2 * libev event processing core, watcher management
4 * Copyright (c) 2007,2008,2009,2010,2011,2012,2013 Marc Alexander Lehmann <libev@schmorp.de>
7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met:
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
40 /* this big block deduces configuration from config.h */
50 # define EV_USE_FLOOR 1
54 # if HAVE_CLOCK_SYSCALL
55 # ifndef EV_USE_CLOCK_SYSCALL
56 # define EV_USE_CLOCK_SYSCALL 1
57 # ifndef EV_USE_REALTIME
58 # define EV_USE_REALTIME 0
60 # ifndef EV_USE_MONOTONIC
61 # define EV_USE_MONOTONIC 1
64 # elif !defined EV_USE_CLOCK_SYSCALL
65 # define EV_USE_CLOCK_SYSCALL 0
68 # if HAVE_CLOCK_GETTIME
69 # ifndef EV_USE_MONOTONIC
70 # define EV_USE_MONOTONIC 1
72 # ifndef EV_USE_REALTIME
73 # define EV_USE_REALTIME 0
76 # ifndef EV_USE_MONOTONIC
77 # define EV_USE_MONOTONIC 0
79 # ifndef EV_USE_REALTIME
80 # define EV_USE_REALTIME 0
85 # ifndef EV_USE_NANOSLEEP
86 # define EV_USE_NANOSLEEP EV_FEATURE_OS
89 # undef EV_USE_NANOSLEEP
90 # define EV_USE_NANOSLEEP 0
93 # if HAVE_SELECT && HAVE_SYS_SELECT_H
94 # ifndef EV_USE_SELECT
95 # define EV_USE_SELECT EV_FEATURE_BACKENDS
99 # define EV_USE_SELECT 0
102 # if HAVE_POLL && HAVE_POLL_H
104 # define EV_USE_POLL EV_FEATURE_BACKENDS
108 # define EV_USE_POLL 0
111 # if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
112 # ifndef EV_USE_EPOLL
113 # define EV_USE_EPOLL EV_FEATURE_BACKENDS
117 # define EV_USE_EPOLL 0
120 # if HAVE_KQUEUE && HAVE_SYS_EVENT_H
121 # ifndef EV_USE_KQUEUE
122 # define EV_USE_KQUEUE EV_FEATURE_BACKENDS
125 # undef EV_USE_KQUEUE
126 # define EV_USE_KQUEUE 0
129 # if HAVE_PORT_H && HAVE_PORT_CREATE
131 # define EV_USE_PORT EV_FEATURE_BACKENDS
135 # define EV_USE_PORT 0
138 # if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
139 # ifndef EV_USE_INOTIFY
140 # define EV_USE_INOTIFY EV_FEATURE_OS
143 # undef EV_USE_INOTIFY
144 # define EV_USE_INOTIFY 0
147 # if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148 # ifndef EV_USE_SIGNALFD
149 # define EV_USE_SIGNALFD EV_FEATURE_OS
152 # undef EV_USE_SIGNALFD
153 # define EV_USE_SIGNALFD 0
157 # ifndef EV_USE_EVENTFD
158 # define EV_USE_EVENTFD EV_FEATURE_OS
161 # undef EV_USE_EVENTFD
162 # define EV_USE_EVENTFD 0
176 #include <sys/types.h>
191 # undef ECB_NO_THREADS
192 # define ECB_NO_THREADS 1
196 # define ECB_NO_SMP 1
200 # include <sys/time.h>
201 # include <sys/wait.h>
205 # define WIN32_LEAN_AND_MEAN
206 # include <winsock2.h>
207 # include <windows.h>
208 # ifndef EV_SELECT_IS_WINSOCKET
209 # define EV_SELECT_IS_WINSOCKET 1
211 # undef EV_AVOID_STDIO
214 /* OS X, in its infinite idiocy, actually HARDCODES
215 * a limit of 1024 into their select. Where people have brains,
216 * OS X engineers apparently have a vacuum. Or maybe they were
217 * ordered to have a vacuum, or they do anything for money.
218 * This might help. Or not.
220 #define _DARWIN_UNLIMITED_SELECT 1
222 /* this block tries to deduce configuration from header-defined symbols and defaults */
224 /* try to deduce the maximum number of signals on this platform */
226 /* use what's provided */
228 # define EV_NSIG (NSIG)
230 # define EV_NSIG (_NSIG)
232 # define EV_NSIG (SIGMAX+1)
233 #elif defined SIG_MAX
234 # define EV_NSIG (SIG_MAX+1)
235 #elif defined _SIG_MAX
236 # define EV_NSIG (_SIG_MAX+1)
238 # define EV_NSIG (MAXSIG+1)
239 #elif defined MAX_SIG
240 # define EV_NSIG (MAX_SIG+1)
241 #elif defined SIGARRAYSIZE
242 # define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
243 #elif defined _sys_nsig
244 # define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
246 # define EV_NSIG (8 * sizeof (sigset_t) + 1)
250 # define EV_USE_FLOOR 0
253 #ifndef EV_USE_CLOCK_SYSCALL
254 # if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
255 # define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
257 # define EV_USE_CLOCK_SYSCALL 0
261 #if !(_POSIX_TIMERS > 0)
262 # ifndef EV_USE_MONOTONIC
263 # define EV_USE_MONOTONIC 0
265 # ifndef EV_USE_REALTIME
266 # define EV_USE_REALTIME 0
270 #ifndef EV_USE_MONOTONIC
271 # if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
272 # define EV_USE_MONOTONIC EV_FEATURE_OS
274 # define EV_USE_MONOTONIC 0
278 #ifndef EV_USE_REALTIME
279 # define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
282 #ifndef EV_USE_NANOSLEEP
283 # if _POSIX_C_SOURCE >= 199309L
284 # define EV_USE_NANOSLEEP EV_FEATURE_OS
286 # define EV_USE_NANOSLEEP 0
290 #ifndef EV_USE_SELECT
291 # define EV_USE_SELECT EV_FEATURE_BACKENDS
296 # define EV_USE_POLL 0
298 # define EV_USE_POLL EV_FEATURE_BACKENDS
303 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
304 # define EV_USE_EPOLL EV_FEATURE_BACKENDS
306 # define EV_USE_EPOLL 0
310 #ifndef EV_USE_KQUEUE
311 # define EV_USE_KQUEUE 0
315 # define EV_USE_PORT 0
318 #ifndef EV_USE_INOTIFY
319 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
320 # define EV_USE_INOTIFY EV_FEATURE_OS
322 # define EV_USE_INOTIFY 0
326 #ifndef EV_PID_HASHSIZE
327 # define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
330 #ifndef EV_INOTIFY_HASHSIZE
331 # define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
334 #ifndef EV_USE_EVENTFD
335 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
336 # define EV_USE_EVENTFD EV_FEATURE_OS
338 # define EV_USE_EVENTFD 0
342 #ifndef EV_USE_SIGNALFD
343 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
344 # define EV_USE_SIGNALFD EV_FEATURE_OS
346 # define EV_USE_SIGNALFD 0
350 #if 0 /* debugging */
352 # define EV_USE_4HEAP 1
353 # define EV_HEAP_CACHE_AT 1
357 # define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
361 # define EV_USE_4HEAP EV_FEATURE_DATA
364 #ifndef EV_HEAP_CACHE_AT
365 # define EV_HEAP_CACHE_AT EV_FEATURE_DATA
369 /* supposedly, android doesn't typedef fd_mask */
370 # undef EV_USE_SELECT
371 # define EV_USE_SELECT 0
372 /* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
373 # undef EV_USE_CLOCK_SYSCALL
374 # define EV_USE_CLOCK_SYSCALL 0
377 /* aix's poll.h seems to cause lots of trouble */
379 /* AIX has a completely broken poll.h header */
381 # define EV_USE_POLL 0
384 /* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
385 /* which makes programs even slower. might work on other unices, too. */
386 #if EV_USE_CLOCK_SYSCALL
387 # include <sys/syscall.h>
388 # ifdef SYS_clock_gettime
389 # define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
390 # undef EV_USE_MONOTONIC
391 # define EV_USE_MONOTONIC 1
393 # undef EV_USE_CLOCK_SYSCALL
394 # define EV_USE_CLOCK_SYSCALL 0
398 /* this block fixes any misconfiguration where we know we run into trouble otherwise */
400 #ifndef CLOCK_MONOTONIC
401 # undef EV_USE_MONOTONIC
402 # define EV_USE_MONOTONIC 0
405 #ifndef CLOCK_REALTIME
406 # undef EV_USE_REALTIME
407 # define EV_USE_REALTIME 0
411 # undef EV_USE_INOTIFY
412 # define EV_USE_INOTIFY 0
415 #if !EV_USE_NANOSLEEP
416 /* hp-ux has it in sys/time.h, which we unconditionally include above */
417 # if !defined _WIN32 && !defined __hpux
418 # include <sys/select.h>
423 # include <sys/statfs.h>
424 # include <sys/inotify.h>
425 /* some very old inotify.h headers don't have IN_DONT_FOLLOW */
426 # ifndef IN_DONT_FOLLOW
427 # undef EV_USE_INOTIFY
428 # define EV_USE_INOTIFY 0
433 /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
435 # ifndef EFD_NONBLOCK
436 # define EFD_NONBLOCK O_NONBLOCK
440 # define EFD_CLOEXEC O_CLOEXEC
442 # define EFD_CLOEXEC 02000000
445 EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
449 /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
451 # ifndef SFD_NONBLOCK
452 # define SFD_NONBLOCK O_NONBLOCK
456 # define SFD_CLOEXEC O_CLOEXEC
458 # define SFD_CLOEXEC 02000000
461 EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
463 struct signalfd_siginfo
466 char pad[128 - sizeof (uint32_t)];
473 # define EV_FREQUENT_CHECK ev_verify (EV_A)
475 # define EV_FREQUENT_CHECK do { } while (0)
479 * This is used to work around floating point rounding problems.
480 * This value is good at least till the year 4000.
482 #define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
483 /*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
485 #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
486 #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
488 #define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
489 #define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
491 /* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
494 * libecb - http://software.schmorp.de/pkg/libecb
496 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
497 * Copyright (©) 2011 Emanuele Giaquinta
498 * All rights reserved.
500 * Redistribution and use in source and binary forms, with or without modifica-
501 * tion, are permitted provided that the following conditions are met:
503 * 1. Redistributions of source code must retain the above copyright notice,
504 * this list of conditions and the following disclaimer.
506 * 2. Redistributions in binary form must reproduce the above copyright
507 * notice, this list of conditions and the following disclaimer in the
508 * documentation and/or other materials provided with the distribution.
510 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
511 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
512 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
513 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
514 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
515 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
516 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
517 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
518 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
519 * OF THE POSSIBILITY OF SUCH DAMAGE.
521 * Alternatively, the contents of this file may be used under the terms of
522 * the GNU General Public License ("GPL") version 2 or any later version,
523 * in which case the provisions of the GPL are applicable instead of
524 * the above. If you wish to allow the use of your version of this file
525 * only under the terms of the GPL and not to allow others to use your
526 * version of this file under the BSD license, indicate your decision
527 * by deleting the provisions above and replace them with the notice
528 * and other provisions required by the GPL. If you do not delete the
529 * provisions above, a recipient may use your version of this file under
530 * either the BSD or the GPL.
536 /* 16 bits major, 16 bits minor */
537 #define ECB_VERSION 0x00010005
540 typedef signed char int8_t;
541 typedef unsigned char uint8_t;
542 typedef signed short int16_t;
543 typedef unsigned short uint16_t;
544 typedef signed int int32_t;
545 typedef unsigned int uint32_t;
547 typedef signed long long int64_t;
548 typedef unsigned long long uint64_t;
549 #else /* _MSC_VER || __BORLANDC__ */
550 typedef signed __int64 int64_t;
551 typedef unsigned __int64 uint64_t;
554 #define ECB_PTRSIZE 8
555 typedef uint64_t uintptr_t;
556 typedef int64_t intptr_t;
558 #define ECB_PTRSIZE 4
559 typedef uint32_t uintptr_t;
560 typedef int32_t intptr_t;
563 #include <inttypes.h>
564 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
565 #define ECB_PTRSIZE 8
567 #define ECB_PTRSIZE 4
571 #define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
572 #define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
574 /* work around x32 idiocy by defining proper macros */
575 #if ECB_GCC_AMD64 || ECB_MSVC_AMD64
577 #define ECB_AMD64_X32 1
583 /* many compilers define _GNUC_ to some versions but then only implement
584 * what their idiot authors think are the "more important" extensions,
585 * causing enormous grief in return for some better fake benchmark numbers.
587 * we try to detect these and simply assume they are not gcc - if they have
588 * an issue with that they should have done it right in the first place.
590 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
591 #define ECB_GCC_VERSION(major,minor) 0
593 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
596 #define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
598 #if __clang__ && defined __has_builtin
599 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
601 #define ECB_CLANG_BUILTIN(x) 0
604 #if __clang__ && defined __has_extension
605 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
607 #define ECB_CLANG_EXTENSION(x) 0
610 #define ECB_CPP (__cplusplus+0)
611 #define ECB_CPP11 (__cplusplus >= 201103L)
615 #define ECB_STDC_VERSION 0
618 #define ECB_STDC_VERSION __STDC_VERSION__
621 #define ECB_C99 (ECB_STDC_VERSION >= 199901L)
622 #define ECB_C11 (ECB_STDC_VERSION >= 201112L)
625 #define ECB_EXTERN_C extern "C"
626 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
627 #define ECB_EXTERN_C_END }
629 #define ECB_EXTERN_C extern
630 #define ECB_EXTERN_C_BEG
631 #define ECB_EXTERN_C_END
634 /*****************************************************************************/
636 /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
637 /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
644 #define ECB_MEMORY_FENCE do { } while (0)
647 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
648 #if __xlC__ && ECB_CPP
649 #include <builtins.h>
653 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
656 #ifndef ECB_MEMORY_FENCE
657 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
658 #if __i386 || __i386__
659 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
660 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
661 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
663 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
664 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
665 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
666 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
667 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
668 #elif defined __ARM_ARCH_2__ \
669 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
670 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
671 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
672 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
673 || defined __ARM_ARCH_5TEJ__
674 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
675 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
676 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
677 || defined __ARM_ARCH_6T2__
678 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
679 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
680 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
681 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
683 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
684 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
685 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
686 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
687 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
688 #elif defined __s390__ || defined __s390x__
689 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
690 #elif defined __mips__
691 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
692 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
693 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
694 #elif defined __alpha__
695 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
696 #elif defined __hppa__
697 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
698 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
699 #elif defined __ia64__
700 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
701 #elif defined __m68k__
702 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
703 #elif defined __m88k__
704 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
706 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
711 #ifndef ECB_MEMORY_FENCE
712 #if ECB_GCC_VERSION(4,7)
713 /* see comment below (stdatomic.h) about the C11 memory model. */
714 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
715 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
716 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
718 #elif ECB_CLANG_EXTENSION(c_atomic)
719 /* see comment below (stdatomic.h) about the C11 memory model. */
720 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
721 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
722 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
724 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
725 #define ECB_MEMORY_FENCE __sync_synchronize ()
726 #elif _MSC_VER >= 1500 /* VC++ 2008 */
727 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
728 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
729 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
730 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
731 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
732 #elif _MSC_VER >= 1400 /* VC++ 2005 */
733 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
734 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
735 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
736 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
739 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
740 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
741 #include <mbarrier.h>
742 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
743 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
744 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
746 #define ECB_MEMORY_FENCE __sync ()
750 #ifndef ECB_MEMORY_FENCE
751 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
752 /* we assume that these memory fences work on all variables/all memory accesses, */
753 /* not just C11 atomics and atomic accesses */
754 #include <stdatomic.h>
755 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
756 /* any fence other than seq_cst, which isn't very efficient for us. */
757 /* Why that is, we don't know - either the C11 memory model is quite useless */
758 /* for most usages, or gcc and clang have a bug */
759 /* I *currently* lean towards the latter, and inefficiently implement */
760 /* all three of ecb's fences as a seq_cst fence */
761 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
762 /* for all __atomic_thread_fence's except seq_cst */
763 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
767 #ifndef ECB_MEMORY_FENCE
768 #if !ECB_AVOID_PTHREADS
770 * if you get undefined symbol references to pthread_mutex_lock,
771 * or failure to find pthread.h, then you should implement
772 * the ECB_MEMORY_FENCE operations for your cpu/compiler
773 * OR provide pthread.h and link against the posix thread library
777 #define ECB_NEEDS_PTHREADS 1
778 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
780 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
781 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
785 #if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
786 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
789 #if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
790 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
793 /*****************************************************************************/
796 #define ecb_inline static inline
797 #elif ECB_GCC_VERSION(2,5)
798 #define ecb_inline static __inline__
800 #define ecb_inline static inline
802 #define ecb_inline static
805 #if ECB_GCC_VERSION(3,3)
806 #define ecb_restrict __restrict__
808 #define ecb_restrict restrict
813 typedef int ecb_bool;
815 #define ECB_CONCAT_(a, b) a ## b
816 #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
817 #define ECB_STRINGIFY_(a) # a
818 #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
819 #define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
821 #define ecb_function_ ecb_inline
823 #if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
824 #define ecb_attribute(attrlist) __attribute__ (attrlist)
826 #define ecb_attribute(attrlist)
829 #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
830 #define ecb_is_constant(expr) __builtin_constant_p (expr)
832 /* possible C11 impl for integral types
833 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
834 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
836 #define ecb_is_constant(expr) 0
839 #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
840 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
842 #define ecb_expect(expr,value) (expr)
845 #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
846 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
848 #define ecb_prefetch(addr,rw,locality)
851 /* no emulation for ecb_decltype */
853 // older implementations might have problems with decltype(x)::type, work around it
854 template<class T> struct ecb_decltype_t { typedef T type; };
855 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
856 #elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
857 #define ecb_decltype(x) __typeof__ (x)
861 #define ecb_deprecated __declspec (deprecated)
863 #define ecb_deprecated ecb_attribute ((__deprecated__))
867 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
868 #elif ECB_GCC_VERSION(4,5)
869 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
871 #define ecb_deprecated_message(msg) ecb_deprecated
875 #define ecb_noinline __declspec (noinline)
877 #define ecb_noinline ecb_attribute ((__noinline__))
880 #define ecb_unused ecb_attribute ((__unused__))
881 #define ecb_const ecb_attribute ((__const__))
882 #define ecb_pure ecb_attribute ((__pure__))
884 #if ECB_C11 || __IBMC_NORETURN
885 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
886 #define ecb_noreturn _Noreturn
888 #define ecb_noreturn [[noreturn]]
889 #elif _MSC_VER >= 1200
890 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
891 #define ecb_noreturn __declspec (noreturn)
893 #define ecb_noreturn ecb_attribute ((__noreturn__))
896 #if ECB_GCC_VERSION(4,3)
897 #define ecb_artificial ecb_attribute ((__artificial__))
898 #define ecb_hot ecb_attribute ((__hot__))
899 #define ecb_cold ecb_attribute ((__cold__))
901 #define ecb_artificial
906 /* put around conditional expressions if you are very sure that the */
907 /* expression is mostly true or mostly false. note that these return */
908 /* booleans, not the expression. */
909 #define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
910 #define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
911 /* for compatibility to the rest of the world */
912 #define ecb_likely(expr) ecb_expect_true (expr)
913 #define ecb_unlikely(expr) ecb_expect_false (expr)
915 /* count trailing zero bits and count # of one bits */
916 #if ECB_GCC_VERSION(3,4) \
917 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
918 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
919 && ECB_CLANG_BUILTIN(__builtin_popcount))
920 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
921 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
922 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
923 #define ecb_ctz32(x) __builtin_ctz (x)
924 #define ecb_ctz64(x) __builtin_ctzll (x)
925 #define ecb_popcount32(x) __builtin_popcount (x)
928 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
929 ecb_function_ ecb_const int
930 ecb_ctz32 (uint32_t x)
932 #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
934 _BitScanForward (&r, x);
939 x &= ~x + 1; /* this isolates the lowest bit */
941 #if ECB_branchless_on_i386
942 r += !!(x & 0xaaaaaaaa) << 0;
943 r += !!(x & 0xcccccccc) << 1;
944 r += !!(x & 0xf0f0f0f0) << 2;
945 r += !!(x & 0xff00ff00) << 3;
946 r += !!(x & 0xffff0000) << 4;
948 if (x & 0xaaaaaaaa) r += 1;
949 if (x & 0xcccccccc) r += 2;
950 if (x & 0xf0f0f0f0) r += 4;
951 if (x & 0xff00ff00) r += 8;
952 if (x & 0xffff0000) r += 16;
959 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
960 ecb_function_ ecb_const int
961 ecb_ctz64 (uint64_t x)
963 #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
965 _BitScanForward64 (&r, x);
968 int shift = x & 0xffffffff ? 0 : 32;
969 return ecb_ctz32 (x >> shift) + shift;
973 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
974 ecb_function_ ecb_const int
975 ecb_popcount32 (uint32_t x)
977 x -= (x >> 1) & 0x55555555;
978 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
979 x = ((x >> 4) + x) & 0x0f0f0f0f;
985 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
986 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
988 #if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
990 _BitScanReverse (&r, x);
995 if (x >> 16) { x >>= 16; r += 16; }
996 if (x >> 8) { x >>= 8; r += 8; }
997 if (x >> 4) { x >>= 4; r += 4; }
998 if (x >> 2) { x >>= 2; r += 2; }
999 if (x >> 1) { r += 1; }
1005 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1006 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1008 #if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1010 _BitScanReverse64 (&r, x);
1015 if (x >> 32) { x >>= 32; r += 32; }
1017 return r + ecb_ld32 (x);
1022 ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1023 ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1024 ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1025 ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1027 ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1028 ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1030 return ( (x * 0x0802U & 0x22110U)
1031 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1034 ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1035 ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1037 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1038 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1039 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1040 x = ( x >> 8 ) | ( x << 8);
1045 ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1046 ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1048 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1049 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1050 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1051 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1052 x = ( x >> 16 ) | ( x << 16);
1057 /* popcount64 is only available on 64 bit cpus as gcc builtin */
1058 /* so for this version we are lazy */
1059 ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1060 ecb_function_ ecb_const int
1061 ecb_popcount64 (uint64_t x)
1063 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1066 ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1067 ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1068 ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1069 ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1070 ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1071 ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1072 ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1073 ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1075 ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1076 ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1077 ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1078 ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1079 ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1080 ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1081 ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1082 ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1084 #if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1085 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1086 #define ecb_bswap16(x) __builtin_bswap16 (x)
1088 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1090 #define ecb_bswap32(x) __builtin_bswap32 (x)
1091 #define ecb_bswap64(x) __builtin_bswap64 (x)
1094 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1095 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1096 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1098 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1099 ecb_function_ ecb_const uint16_t
1100 ecb_bswap16 (uint16_t x)
1102 return ecb_rotl16 (x, 8);
1105 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1106 ecb_function_ ecb_const uint32_t
1107 ecb_bswap32 (uint32_t x)
1109 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1112 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1113 ecb_function_ ecb_const uint64_t
1114 ecb_bswap64 (uint64_t x)
1116 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1120 #if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1121 #define ecb_unreachable() __builtin_unreachable ()
1123 /* this seems to work fine, but gcc always emits a warning for it :/ */
1124 ecb_inline ecb_noreturn void ecb_unreachable (void);
1125 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1128 /* try to tell the compiler that some condition is definitely true */
1129 #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1131 ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1132 ecb_inline ecb_const uint32_t
1133 ecb_byteorder_helper (void)
1135 /* the union code still generates code under pressure in gcc, */
1136 /* but less than using pointers, and always seems to */
1137 /* successfully return a constant. */
1138 /* the reason why we have this horrible preprocessor mess */
1139 /* is to avoid it in all cases, at least on common architectures */
1140 /* or when using a recent enough gcc version (>= 4.6) */
1141 #if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1142 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1143 #define ECB_LITTLE_ENDIAN 1
1145 #elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1146 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1147 #define ECB_BIG_ENDIAN 1
1154 } u = { 0x11, 0x22, 0x33, 0x44 };
1159 ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1160 ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1161 ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1162 ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1164 #if ECB_GCC_VERSION(3,0) || ECB_C99
1165 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1167 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1171 template<typename T>
1172 static inline T ecb_div_rd (T val, T div)
1174 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1176 template<typename T>
1177 static inline T ecb_div_ru (T val, T div)
1179 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1182 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1183 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1186 #if ecb_cplusplus_does_not_suck
1187 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1188 template<typename T, int N>
1189 static inline int ecb_array_length (const T (&arr)[N])
1194 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1197 ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1198 ecb_function_ ecb_const uint32_t
1199 ecb_binary16_to_binary32 (uint32_t x)
1201 unsigned int s = (x & 0x8000) << (31 - 15);
1202 int e = (x >> 10) & 0x001f;
1203 unsigned int m = x & 0x03ff;
1205 if (ecb_expect_false (e == 31))
1206 /* infinity or NaN */
1207 e = 255 - (127 - 15);
1208 else if (ecb_expect_false (!e))
1210 if (ecb_expect_true (!m))
1211 /* zero, handled by code below by forcing e to 0 */
1215 /* subnormal, renormalise */
1216 unsigned int s = 10 - ecb_ld32 (m);
1218 m = (m << s) & 0x3ff; /* mask implicit bit */
1223 /* e and m now are normalised, or zero, (or inf or nan) */
1226 return s | (e << 23) | (m << (23 - 10));
1229 ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1230 ecb_function_ ecb_const uint16_t
1231 ecb_binary32_to_binary16 (uint32_t x)
1233 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1234 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1235 unsigned int m = x & 0x007fffff;
1239 /* if it's within range of binary16 normals, use fast path */
1240 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1242 /* mantissa round-to-even */
1243 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1245 /* handle overflow */
1246 if (ecb_expect_false (m >= 0x00800000))
1252 return s | (e << 10) | (m >> (23 - 10));
1255 /* handle large numbers and infinity */
1256 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1259 /* handle zero, subnormals and small numbers */
1260 if (ecb_expect_true (x < 0x38800000))
1263 if (ecb_expect_true (!x))
1266 /* handle subnormals */
1268 /* too small, will be zero */
1269 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1272 m |= 0x00800000; /* make implicit bit explicit */
1274 /* very tricky - we need to round to the nearest e (+10) bit value */
1276 unsigned int bits = 14 - e;
1277 unsigned int half = (1 << (bits - 1)) - 1;
1278 unsigned int even = (m >> bits) & 1;
1280 /* if this overflows, we will end up with a normalised number */
1281 m = (m + half + even) >> bits;
1287 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1290 return s | 0x7c00 | m | !m;
1293 /*******************************************************************************/
1294 /* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1296 /* basically, everything uses "ieee pure-endian" floating point numbers */
1297 /* the only noteworthy exception is ancient armle, which uses order 43218765 */
1299 || __i386 || __i386__ \
1301 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1302 || defined __s390__ || defined __s390x__ \
1303 || defined __mips__ \
1304 || defined __alpha__ \
1305 || defined __hppa__ \
1306 || defined __ia64__ \
1307 || defined __m68k__ \
1308 || defined __m88k__ \
1310 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1311 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1312 || defined __aarch64__
1314 #include <string.h> /* for memcpy */
1321 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1323 /* only the oldest of old doesn't have this one. solaris. */
1325 #define ECB_INFINITY INFINITY
1327 #define ECB_INFINITY HUGE_VAL
1333 #define ECB_NAN ECB_INFINITY
1336 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1337 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1338 #define ecb_frexpf(x,e) frexpf ((x), (e))
1340 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1341 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1344 /* convert a float to ieee single/binary32 */
1345 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1346 ecb_function_ ecb_const uint32_t
1347 ecb_float_to_binary32 (float x)
1354 /* slow emulation, works for anything but -0 */
1358 if (x == 0e0f ) return 0x00000000U;
1359 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1360 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1361 if (x != x ) return 0x7fbfffffU;
1363 m = ecb_frexpf (x, &e) * 0x1000000U;
1365 r = m & 0x80000000U;
1377 r |= (e + 126) << 23;
1384 /* converts an ieee single/binary32 to a float */
1385 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1386 ecb_function_ ecb_const float
1387 ecb_binary32_to_float (uint32_t x)
1394 /* emulation, only works for normals and subnormals and +0 */
1396 int e = (x >> 23) & 0xffU;
1405 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1406 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1414 /* convert a double to ieee double/binary64 */
1415 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1416 ecb_function_ ecb_const uint64_t
1417 ecb_double_to_binary64 (double x)
1424 /* slow emulation, works for anything but -0 */
1428 if (x == 0e0 ) return 0x0000000000000000U;
1429 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1430 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1431 if (x != x ) return 0X7ff7ffffffffffffU;
1433 m = frexp (x, &e) * 0x20000000000000U;
1435 r = m & 0x8000000000000000;;
1442 m &= 0x1fffffffffffffU;
1447 r |= ((uint64_t)(e + 1022)) << 52;
1448 r |= m & 0xfffffffffffffU;
1454 /* converts an ieee double/binary64 to a double */
1455 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1456 ecb_function_ ecb_const double
1457 ecb_binary64_to_double (uint64_t x)
1464 /* emulation, only works for normals and subnormals and +0 */
1466 int e = (x >> 52) & 0x7ffU;
1468 x &= 0xfffffffffffffU;
1471 x |= 0x10000000000000U;
1475 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1476 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1484 /* convert a float to ieee half/binary16 */
1485 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1486 ecb_function_ ecb_const uint16_t
1487 ecb_float_to_binary16 (float x)
1489 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1492 /* convert an ieee half/binary16 to float */
1493 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1494 ecb_function_ ecb_const float
1495 ecb_binary16_to_float (uint16_t x)
1497 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1506 #if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1507 /* if your architecture doesn't need memory fences, e.g. because it is
1508 * single-cpu/core, or if you use libev in a project that doesn't use libev
1509 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1510 * libev, in which cases the memory fences become nops.
1511 * alternatively, you can remove this #error and link against libpthread,
1512 * which will then provide the memory fences.
1514 # error "memory fences not defined for your architecture, please report"
1517 #ifndef ECB_MEMORY_FENCE
1518 # define ECB_MEMORY_FENCE do { } while (0)
1519 # define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1520 # define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1523 #define expect_false(cond) ecb_expect_false (cond)
1524 #define expect_true(cond) ecb_expect_true (cond)
1525 #define noinline ecb_noinline
1527 #define inline_size ecb_inline
1530 # define inline_speed ecb_inline
1532 # define inline_speed static noinline
1535 #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1537 #if EV_MINPRI == EV_MAXPRI
1538 # define ABSPRI(w) (((W)w), 0)
1540 # define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1543 #define EMPTY /* required for microsofts broken pseudo-c compiler */
1544 #define EMPTY2(a,b) /* used to suppress some warnings */
1546 typedef ev_watcher *W;
1547 typedef ev_watcher_list *WL;
1548 typedef ev_watcher_time *WT;
1550 #define ev_active(w) ((W)(w))->active
1551 #define ev_at(w) ((WT)(w))->at
1554 /* sig_atomic_t is used to avoid per-thread variables or locking but still */
1555 /* giving it a reasonably high chance of working on typical architectures */
1556 static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1559 #if EV_USE_MONOTONIC
1560 static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1563 #ifndef EV_FD_TO_WIN32_HANDLE
1564 # define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1566 #ifndef EV_WIN32_HANDLE_TO_FD
1567 # define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1569 #ifndef EV_WIN32_CLOSE_FD
1570 # define EV_WIN32_CLOSE_FD(fd) close (fd)
1574 # include "ev_win32.c"
1577 /*****************************************************************************/
1579 /* define a suitable floor function (only used by periodics atm) */
1583 # define ev_floor(v) floor (v)
1588 /* a floor() replacement function, should be independent of ev_tstamp type */
1589 static ev_tstamp noinline
1590 ev_floor (ev_tstamp v)
1592 /* the choice of shift factor is not terribly important */
1593 #if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1594 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1596 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1599 /* argument too large for an unsigned long? */
1600 if (expect_false (v >= shift))
1605 return v; /* very large number */
1607 f = shift * ev_floor (v * (1. / shift));
1608 return f + ev_floor (v - f);
1611 /* special treatment for negative args? */
1612 if (expect_false (v < 0.))
1614 ev_tstamp f = -ev_floor (-v);
1616 return f - (f == v ? 0 : 1);
1619 /* fits into an unsigned long */
1620 return (unsigned long)v;
1625 /*****************************************************************************/
1628 # include <sys/utsname.h>
1631 static unsigned int noinline ecb_cold
1632 ev_linux_version (void)
1638 char *p = buf.release;
1643 for (i = 3+1; --i; )
1649 if (*p >= '0' && *p <= '9')
1650 c = c * 10 + *p++ - '0';
1667 /*****************************************************************************/
1670 static void noinline ecb_cold
1671 ev_printerr (const char *msg)
1673 write (STDERR_FILENO, msg, strlen (msg));
1677 static void (*syserr_cb)(const char *msg) EV_THROW;
1680 ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
1685 static void noinline ecb_cold
1686 ev_syserr (const char *msg)
1689 msg = "(libev) system error";
1698 ev_printerr (strerror (errno));
1708 ev_realloc_emul (void *ptr, long size) EV_THROW
1710 /* some systems, notably openbsd and darwin, fail to properly
1711 * implement realloc (x, 0) (as required by both ansi c-89 and
1712 * the single unix specification, so work around them here.
1713 * recently, also (at least) fedora and debian started breaking it,
1714 * despite documenting it otherwise.
1718 return realloc (ptr, size);
1724 static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
1727 ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
1733 ev_realloc (void *ptr, long size)
1735 ptr = alloc (ptr, size);
1740 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1742 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1750 #define ev_malloc(size) ev_realloc (0, (size))
1751 #define ev_free(ptr) ev_realloc ((ptr), 0)
1753 /*****************************************************************************/
1755 /* set in reify when reification needed */
1756 #define EV_ANFD_REIFY 1
1758 /* file descriptor info structure */
1762 unsigned char events; /* the events watched for */
1763 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1764 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
1765 unsigned char unused;
1767 unsigned int egen; /* generation counter to counter epoll bugs */
1769 #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1777 /* stores the pending event set for a given watcher */
1781 int events; /* the pending event set for the given watcher */
1785 /* hash table entry per inotify-id */
1793 #if EV_HEAP_CACHE_AT
1794 /* a heap element */
1800 #define ANHE_w(he) (he).w /* access watcher, read-write */
1801 #define ANHE_at(he) (he).at /* access cached at, read-only */
1802 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1804 /* a heap element */
1807 #define ANHE_w(he) (he)
1808 #define ANHE_at(he) (he)->at
1809 #define ANHE_at_cache(he)
1816 ev_tstamp ev_rt_now;
1817 #define ev_rt_now ((loop)->ev_rt_now)
1818 #define VAR(name,decl) decl;
1819 #include "ev_vars.h"
1822 #include "ev_wrap.h"
1824 static struct ev_loop default_loop_struct;
1825 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
1829 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
1830 #define VAR(name,decl) static decl;
1831 #include "ev_vars.h"
1834 static int ev_default_loop_ptr;
1839 # define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1840 # define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1841 # define EV_INVOKE_PENDING invoke_cb (EV_A)
1843 # define EV_RELEASE_CB (void)0
1844 # define EV_ACQUIRE_CB (void)0
1845 # define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1848 #define EVBREAK_RECURSE 0x80
1850 /*****************************************************************************/
1852 #ifndef EV_HAVE_EV_TIME
1854 ev_time (void) EV_THROW
1857 if (expect_true (have_realtime))
1860 clock_gettime (CLOCK_REALTIME, &ts);
1861 return ts.tv_sec + ts.tv_nsec * 1e-9;
1866 gettimeofday (&tv, 0);
1867 return tv.tv_sec + tv.tv_usec * 1e-6;
1871 inline_size ev_tstamp
1874 #if EV_USE_MONOTONIC
1875 if (expect_true (have_monotonic))
1878 clock_gettime (CLOCK_MONOTONIC, &ts);
1879 return ts.tv_sec + ts.tv_nsec * 1e-9;
1888 ev_now (EV_P) EV_THROW
1895 ev_sleep (ev_tstamp delay) EV_THROW
1899 #if EV_USE_NANOSLEEP
1902 EV_TS_SET (ts, delay);
1904 #elif defined _WIN32
1905 Sleep ((unsigned long)(delay * 1e3));
1909 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1910 /* something not guaranteed by newer posix versions, but guaranteed */
1912 EV_TV_SET (tv, delay);
1913 select (0, 0, 0, 0, &tv);
1918 /*****************************************************************************/
1920 #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1922 /* find a suitable new size for the given array, */
1923 /* hopefully by rounding to a nice-to-malloc size */
1925 array_nextsize (int elem, int cur, int cnt)
1933 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
1934 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
1937 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
1938 ncur = ncur - sizeof (void *) * 4;
1945 static void * noinline ecb_cold
1946 array_realloc (int elem, void *base, int *cur, int cnt)
1948 *cur = array_nextsize (elem, *cur, cnt);
1949 return ev_realloc (base, elem * *cur);
1952 #define array_init_zero(base,count) \
1953 memset ((void *)(base), 0, sizeof (*(base)) * (count))
1955 #define array_needsize(type,base,cur,cnt,init) \
1956 if (expect_false ((cnt) > (cur))) \
1958 int ecb_unused ocur_ = (cur); \
1959 (base) = (type *)array_realloc \
1960 (sizeof (type), (base), &(cur), (cnt)); \
1961 init ((base) + (ocur_), (cur) - ocur_); \
1965 #define array_slim(type,stem) \
1966 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
1968 stem ## max = array_roundsize (stem ## cnt >> 1); \
1969 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
1970 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
1974 #define array_free(stem, idx) \
1975 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
1977 /*****************************************************************************/
1979 /* dummy callback for pending events */
1980 static void noinline
1981 pendingcb (EV_P_ ev_prepare *w, int revents)
1986 ev_feed_event (EV_P_ void *w, int revents) EV_THROW
1989 int pri = ABSPRI (w_);
1991 if (expect_false (w_->pending))
1992 pendings [pri][w_->pending - 1].events |= revents;
1995 w_->pending = ++pendingcnt [pri];
1996 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1997 pendings [pri][w_->pending - 1].w = w_;
1998 pendings [pri][w_->pending - 1].events = revents;
2001 pendingpri = NUMPRI - 1;
2005 feed_reverse (EV_P_ W w)
2007 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
2008 rfeeds [rfeedcnt++] = w;
2012 feed_reverse_done (EV_P_ int revents)
2015 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
2020 queue_events (EV_P_ W *events, int eventcnt, int type)
2024 for (i = 0; i < eventcnt; ++i)
2025 ev_feed_event (EV_A_ events [i], type);
2028 /*****************************************************************************/
2031 fd_event_nocheck (EV_P_ int fd, int revents)
2033 ANFD *anfd = anfds + fd;
2036 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
2038 int ev = w->events & revents;
2041 ev_feed_event (EV_A_ (W)w, ev);
2045 /* do not submit kernel events for fds that have reify set */
2046 /* because that means they changed while we were polling for new events */
2048 fd_event (EV_P_ int fd, int revents)
2050 ANFD *anfd = anfds + fd;
2052 if (expect_true (!anfd->reify))
2053 fd_event_nocheck (EV_A_ fd, revents);
2057 ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
2059 if (fd >= 0 && fd < anfdmax)
2060 fd_event_nocheck (EV_A_ fd, revents);
2063 /* make sure the external fd watch events are in-sync */
2064 /* with the kernel/libev internal state */
2070 #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2071 for (i = 0; i < fdchangecnt; ++i)
2073 int fd = fdchanges [i];
2074 ANFD *anfd = anfds + fd;
2076 if (anfd->reify & EV__IOFDSET && anfd->head)
2078 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2080 if (handle != anfd->handle)
2084 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2086 /* handle changed, but fd didn't - we need to do it in two steps */
2087 backend_modify (EV_A_ fd, anfd->events, 0);
2089 anfd->handle = handle;
2095 for (i = 0; i < fdchangecnt; ++i)
2097 int fd = fdchanges [i];
2098 ANFD *anfd = anfds + fd;
2101 unsigned char o_events = anfd->events;
2102 unsigned char o_reify = anfd->reify;
2106 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
2110 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
2111 anfd->events |= (unsigned char)w->events;
2113 if (o_events != anfd->events)
2114 o_reify = EV__IOFDSET; /* actually |= */
2117 if (o_reify & EV__IOFDSET)
2118 backend_modify (EV_A_ fd, o_events, anfd->events);
2124 /* something about the given fd changed */
2126 fd_change (EV_P_ int fd, int flags)
2128 unsigned char reify = anfds [fd].reify;
2129 anfds [fd].reify |= flags;
2131 if (expect_true (!reify))
2134 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
2135 fdchanges [fdchangecnt - 1] = fd;
2139 /* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
2140 inline_speed void ecb_cold
2141 fd_kill (EV_P_ int fd)
2145 while ((w = (ev_io *)anfds [fd].head))
2147 ev_io_stop (EV_A_ w);
2148 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
2152 /* check whether the given fd is actually valid, for error recovery */
2153 inline_size int ecb_cold
2157 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
2159 return fcntl (fd, F_GETFD) != -1;
2163 /* called on EBADF to verify fds */
2164 static void noinline ecb_cold
2169 for (fd = 0; fd < anfdmax; ++fd)
2170 if (anfds [fd].events)
2171 if (!fd_valid (fd) && errno == EBADF)
2175 /* called on ENOMEM in select/poll to kill some fds and retry */
2176 static void noinline ecb_cold
2181 for (fd = anfdmax; fd--; )
2182 if (anfds [fd].events)
2189 /* usually called after fork if backend needs to re-arm all fds from scratch */
2190 static void noinline
2195 for (fd = 0; fd < anfdmax; ++fd)
2196 if (anfds [fd].events)
2198 anfds [fd].events = 0;
2199 anfds [fd].emask = 0;
2200 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
2204 /* used to prepare libev internal fd's */
2205 /* this is not fork-safe */
2210 unsigned long arg = 1;
2211 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
2213 fcntl (fd, F_SETFD, FD_CLOEXEC);
2214 fcntl (fd, F_SETFL, O_NONBLOCK);
2218 /*****************************************************************************/
2221 * the heap functions want a real array index. array index 0 is guaranteed to not
2222 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
2223 * the branching factor of the d-tree.
2227 * at the moment we allow libev the luxury of two heaps,
2228 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
2229 * which is more cache-efficient.
2230 * the difference is about 5% with 50000+ watchers.
2235 #define HEAP0 (DHEAP - 1) /* index of first element in heap */
2236 #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
2237 #define UPHEAP_DONE(p,k) ((p) == (k))
2239 /* away from the root */
2241 downheap (ANHE *heap, int N, int k)
2244 ANHE *E = heap + N + HEAP0;
2250 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
2252 /* find minimum child */
2253 if (expect_true (pos + DHEAP - 1 < E))
2255 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2256 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2257 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2258 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2262 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2263 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2264 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2265 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2270 if (ANHE_at (he) <= minat)
2274 ev_active (ANHE_w (*minpos)) = k;
2280 ev_active (ANHE_w (he)) = k;
2286 #define HPARENT(k) ((k) >> 1)
2287 #define UPHEAP_DONE(p,k) (!(p))
2289 /* away from the root */
2291 downheap (ANHE *heap, int N, int k)
2302 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
2305 if (ANHE_at (he) <= ANHE_at (heap [c]))
2308 heap [k] = heap [c];
2309 ev_active (ANHE_w (heap [k])) = k;
2315 ev_active (ANHE_w (he)) = k;
2319 /* towards the root */
2321 upheap (ANHE *heap, int k)
2327 int p = HPARENT (k);
2329 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
2332 heap [k] = heap [p];
2333 ev_active (ANHE_w (heap [k])) = k;
2338 ev_active (ANHE_w (he)) = k;
2341 /* move an element suitably so it is in a correct place */
2343 adjustheap (ANHE *heap, int N, int k)
2345 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
2348 downheap (heap, N, k);
2351 /* rebuild the heap: this function is used only once and executed rarely */
2353 reheap (ANHE *heap, int N)
2357 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
2358 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
2359 for (i = 0; i < N; ++i)
2360 upheap (heap, i + HEAP0);
2363 /*****************************************************************************/
2365 /* associate signal watchers to a signal signal */
2368 EV_ATOMIC_T pending;
2375 static ANSIG signals [EV_NSIG - 1];
2377 /*****************************************************************************/
2379 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2381 static void noinline ecb_cold
2384 if (!ev_is_active (&pipe_w))
2390 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2391 if (fds [1] < 0 && errno == EINVAL)
2392 fds [1] = eventfd (0, 0);
2398 ev_syserr ("(libev) error creating signal/async pipe");
2400 fd_intern (fds [0]);
2403 evpipe [0] = fds [0];
2406 evpipe [1] = fds [1]; /* first call, set write fd */
2409 /* on subsequent calls, do not change evpipe [1] */
2410 /* so that evpipe_write can always rely on its value. */
2411 /* this branch does not do anything sensible on windows, */
2412 /* so must not be executed on windows */
2414 dup2 (fds [1], evpipe [1]);
2418 fd_intern (evpipe [1]);
2420 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2421 ev_io_start (EV_A_ &pipe_w);
2422 ev_unref (EV_A); /* watcher should not keep loop alive */
2427 evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2429 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2431 if (expect_true (*flag))
2435 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2437 pipe_write_skipped = 1;
2439 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2441 if (pipe_write_wanted)
2445 pipe_write_skipped = 0;
2446 ECB_MEMORY_FENCE_RELEASE;
2448 old_errno = errno; /* save errno because write will clobber it */
2453 uint64_t counter = 1;
2454 write (evpipe [1], &counter, sizeof (uint64_t));
2464 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2466 write (evpipe [1], &(evpipe [1]), 1);
2474 /* called whenever the libev signal pipe */
2475 /* got some events (signal, async) */
2477 pipecb (EV_P_ ev_io *iow, int revents)
2481 if (revents & EV_READ)
2487 read (evpipe [1], &counter, sizeof (uint64_t));
2498 buf.len = sizeof (dummy);
2499 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2501 read (evpipe [0], &dummy, sizeof (dummy));
2506 pipe_write_skipped = 0;
2508 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2510 #if EV_SIGNAL_ENABLE
2517 for (i = EV_NSIG - 1; i--; )
2518 if (expect_false (signals [i].pending))
2519 ev_feed_signal_event (EV_A_ i + 1);
2530 for (i = asynccnt; i--; )
2531 if (asyncs [i]->sent)
2533 asyncs [i]->sent = 0;
2534 ECB_MEMORY_FENCE_RELEASE;
2535 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
2541 /*****************************************************************************/
2544 ev_feed_signal (int signum) EV_THROW
2548 ECB_MEMORY_FENCE_ACQUIRE;
2549 EV_A = signals [signum - 1].loop;
2555 signals [signum - 1].pending = 1;
2556 evpipe_write (EV_A_ &sig_pending);
2560 ev_sighandler (int signum)
2563 signal (signum, ev_sighandler);
2566 ev_feed_signal (signum);
2570 ev_feed_signal_event (EV_P_ int signum) EV_THROW
2574 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2580 /* it is permissible to try to feed a signal to the wrong loop */
2581 /* or, likely more useful, feeding a signal nobody is waiting for */
2583 if (expect_false (signals [signum].loop != EV_A))
2587 signals [signum].pending = 0;
2588 ECB_MEMORY_FENCE_RELEASE;
2590 for (w = signals [signum].head; w; w = w->next)
2591 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2596 sigfdcb (EV_P_ ev_io *iow, int revents)
2598 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2602 ssize_t res = read (sigfd, si, sizeof (si));
2604 /* not ISO-C, as res might be -1, but works with SuS */
2605 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2606 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2608 if (res < (ssize_t)sizeof (si))
2616 /*****************************************************************************/
2619 static WL childs [EV_PID_HASHSIZE];
2621 static ev_signal childev;
2623 #ifndef WIFCONTINUED
2624 # define WIFCONTINUED(status) 0
2627 /* handle a single child status event */
2629 child_reap (EV_P_ int chain, int pid, int status)
2632 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
2634 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2636 if ((w->pid == pid || !w->pid)
2637 && (!traced || (w->flags & 1)))
2639 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
2641 w->rstatus = status;
2642 ev_feed_event (EV_A_ (W)w, EV_CHILD);
2648 # define WCONTINUED 0
2651 /* called on sigchld etc., calls waitpid */
2653 childcb (EV_P_ ev_signal *sw, int revents)
2657 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
2658 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
2661 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
2664 /* make sure we are called again until all children have been reaped */
2665 /* we need to do it this way so that the callback gets called before we continue */
2666 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
2668 child_reap (EV_A_ pid, pid, status);
2669 if ((EV_PID_HASHSIZE) > 1)
2670 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
2675 /*****************************************************************************/
2678 # include "ev_iocp.c"
2681 # include "ev_port.c"
2684 # include "ev_kqueue.c"
2687 # include "ev_epoll.c"
2690 # include "ev_poll.c"
2693 # include "ev_select.c"
2697 ev_version_major (void) EV_THROW
2699 return EV_VERSION_MAJOR;
2703 ev_version_minor (void) EV_THROW
2705 return EV_VERSION_MINOR;
2708 /* return true if we are running with elevated privileges and should ignore env variables */
2709 int inline_size ecb_cold
2710 enable_secure (void)
2715 return getuid () != geteuid ()
2716 || getgid () != getegid ();
2720 unsigned int ecb_cold
2721 ev_supported_backends (void) EV_THROW
2723 unsigned int flags = 0;
2725 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2726 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
2727 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2728 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2729 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2734 unsigned int ecb_cold
2735 ev_recommended_backends (void) EV_THROW
2737 unsigned int flags = ev_supported_backends ();
2740 /* kqueue is borked on everything but netbsd apparently */
2741 /* it usually doesn't work correctly on anything but sockets and pipes */
2742 flags &= ~EVBACKEND_KQUEUE;
2745 /* only select works correctly on that "unix-certified" platform */
2746 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2747 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2750 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2756 unsigned int ecb_cold
2757 ev_embeddable_backends (void) EV_THROW
2759 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2761 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2762 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2763 flags &= ~EVBACKEND_EPOLL;
2769 ev_backend (EV_P) EV_THROW
2776 ev_iteration (EV_P) EV_THROW
2782 ev_depth (EV_P) EV_THROW
2788 ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2790 io_blocktime = interval;
2794 ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2796 timeout_blocktime = interval;
2800 ev_set_userdata (EV_P_ void *data) EV_THROW
2806 ev_userdata (EV_P) EV_THROW
2812 ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
2814 invoke_cb = invoke_pending_cb;
2818 ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2820 release_cb = release;
2821 acquire_cb = acquire;
2825 /* initialise a loop structure, must be zero-initialised */
2826 static void noinline ecb_cold
2827 loop_init (EV_P_ unsigned int flags) EV_THROW
2838 if (!clock_gettime (CLOCK_REALTIME, &ts))
2843 #if EV_USE_MONOTONIC
2844 if (!have_monotonic)
2848 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
2853 /* pid check not overridable via env */
2855 if (flags & EVFLAG_FORKCHECK)
2859 if (!(flags & EVFLAG_NOENV)
2860 && !enable_secure ()
2861 && getenv ("LIBEV_FLAGS"))
2862 flags = atoi (getenv ("LIBEV_FLAGS"));
2864 ev_rt_now = ev_time ();
2865 mn_now = get_clock ();
2867 rtmn_diff = ev_rt_now - mn_now;
2869 invoke_cb = ev_invoke_pending;
2873 timeout_blocktime = 0.;
2880 pipe_write_skipped = 0;
2881 pipe_write_wanted = 0;
2885 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2888 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2891 if (!(flags & EVBACKEND_MASK))
2892 flags |= ev_recommended_backends ();
2895 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2898 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
2901 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
2904 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
2907 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
2910 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
2913 ev_prepare_init (&pending_w, pendingcb);
2915 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2916 ev_init (&pipe_w, pipecb);
2917 ev_set_priority (&pipe_w, EV_MAXPRI);
2922 /* free up a loop structure */
2924 ev_loop_destroy (EV_P)
2929 /* mimic free (0) */
2934 #if EV_CLEANUP_ENABLE
2935 /* queue cleanup watchers (and execute them) */
2936 if (expect_false (cleanupcnt))
2938 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2944 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2946 ev_ref (EV_A); /* child watcher */
2947 ev_signal_stop (EV_A_ &childev);
2951 if (ev_is_active (&pipe_w))
2954 /*ev_io_stop (EV_A_ &pipe_w);*/
2956 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2957 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2961 if (ev_is_active (&sigfd_w))
2970 if (backend_fd >= 0)
2974 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2977 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
2980 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
2983 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
2986 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
2989 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
2992 for (i = NUMPRI; i--; )
2994 array_free (pending, [i]);
2996 array_free (idle, [i]);
3000 ev_free (anfds); anfds = 0; anfdmax = 0;
3002 /* have to use the microsoft-never-gets-it-right macro */
3003 array_free (rfeed, EMPTY);
3004 array_free (fdchange, EMPTY);
3005 array_free (timer, EMPTY);
3006 #if EV_PERIODIC_ENABLE
3007 array_free (periodic, EMPTY);
3010 array_free (fork, EMPTY);
3012 #if EV_CLEANUP_ENABLE
3013 array_free (cleanup, EMPTY);
3015 array_free (prepare, EMPTY);
3016 array_free (check, EMPTY);
3018 array_free (async, EMPTY);
3024 if (ev_is_default_loop (EV_A))
3026 ev_default_loop_ptr = 0;
3034 inline_size void infy_fork (EV_P);
3041 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
3044 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
3047 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
3053 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
3054 if (ev_is_active (&pipe_w) && postfork != 2)
3056 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
3059 ev_io_stop (EV_A_ &pipe_w);
3061 if (evpipe [0] >= 0)
3062 EV_WIN32_CLOSE_FD (evpipe [0]);
3065 /* iterate over everything, in case we missed something before */
3066 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3075 struct ev_loop * ecb_cold
3076 ev_loop_new (unsigned int flags) EV_THROW
3078 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
3080 memset (EV_A, 0, sizeof (struct ev_loop));
3081 loop_init (EV_A_ flags);
3083 if (ev_backend (EV_A))
3090 #endif /* multiplicity */
3093 static void noinline ecb_cold
3094 verify_watcher (EV_P_ W w)
3096 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
3099 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
3102 static void noinline ecb_cold
3103 verify_heap (EV_P_ ANHE *heap, int N)
3107 for (i = HEAP0; i < N + HEAP0; ++i)
3109 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
3110 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
3111 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
3113 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
3117 static void noinline ecb_cold
3118 array_verify (EV_P_ W *ws, int cnt)
3122 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
3123 verify_watcher (EV_A_ ws [cnt]);
3130 ev_verify (EV_P) EV_THROW
3136 assert (activecnt >= -1);
3138 assert (fdchangemax >= fdchangecnt);
3139 for (i = 0; i < fdchangecnt; ++i)
3140 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
3142 assert (anfdmax >= 0);
3143 for (i = 0; i < anfdmax; ++i)
3147 for (w = w2 = anfds [i].head; w; w = w->next)
3149 verify_watcher (EV_A_ (W)w);
3153 assert (("libev: io watcher list contains a loop", w != w2));
3157 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
3158 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
3162 assert (timermax >= timercnt);
3163 verify_heap (EV_A_ timers, timercnt);
3165 #if EV_PERIODIC_ENABLE
3166 assert (periodicmax >= periodiccnt);
3167 verify_heap (EV_A_ periodics, periodiccnt);
3170 for (i = NUMPRI; i--; )
3172 assert (pendingmax [i] >= pendingcnt [i]);
3174 assert (idleall >= 0);
3175 assert (idlemax [i] >= idlecnt [i]);
3176 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
3181 assert (forkmax >= forkcnt);
3182 array_verify (EV_A_ (W *)forks, forkcnt);
3185 #if EV_CLEANUP_ENABLE
3186 assert (cleanupmax >= cleanupcnt);
3187 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3191 assert (asyncmax >= asynccnt);
3192 array_verify (EV_A_ (W *)asyncs, asynccnt);
3195 #if EV_PREPARE_ENABLE
3196 assert (preparemax >= preparecnt);
3197 array_verify (EV_A_ (W *)prepares, preparecnt);
3201 assert (checkmax >= checkcnt);
3202 array_verify (EV_A_ (W *)checks, checkcnt);
3207 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
3208 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3216 struct ev_loop * ecb_cold
3220 ev_default_loop (unsigned int flags) EV_THROW
3222 if (!ev_default_loop_ptr)
3225 EV_P = ev_default_loop_ptr = &default_loop_struct;
3227 ev_default_loop_ptr = 1;
3230 loop_init (EV_A_ flags);
3232 if (ev_backend (EV_A))
3235 ev_signal_init (&childev, childcb, SIGCHLD);
3236 ev_set_priority (&childev, EV_MAXPRI);
3237 ev_signal_start (EV_A_ &childev);
3238 ev_unref (EV_A); /* child watcher should not keep loop alive */
3242 ev_default_loop_ptr = 0;
3245 return ev_default_loop_ptr;
3249 ev_loop_fork (EV_P) EV_THROW
3254 /*****************************************************************************/
3257 ev_invoke (EV_P_ void *w, int revents)
3259 EV_CB_INVOKE ((W)w, revents);
3263 ev_pending_count (EV_P) EV_THROW
3266 unsigned int count = 0;
3268 for (pri = NUMPRI; pri--; )
3269 count += pendingcnt [pri];
3275 ev_invoke_pending (EV_P)
3277 pendingpri = NUMPRI;
3279 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3283 while (pendingcnt [pendingpri])
3285 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
3288 EV_CB_INVOKE (p->w, p->events);
3295 /* make idle watchers pending. this handles the "call-idle */
3296 /* only when higher priorities are idle" logic */
3300 if (expect_false (idleall))
3304 for (pri = NUMPRI; pri--; )
3306 if (pendingcnt [pri])
3311 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
3319 /* make timers pending */
3325 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
3329 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
3331 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
3333 /* first reschedule or stop timer */
3336 ev_at (w) += w->repeat;
3337 if (ev_at (w) < mn_now)
3340 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
3342 ANHE_at_cache (timers [HEAP0]);
3343 downheap (timers, timercnt, HEAP0);
3346 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
3349 feed_reverse (EV_A_ (W)w);
3351 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
3353 feed_reverse_done (EV_A_ EV_TIMER);
3357 #if EV_PERIODIC_ENABLE
3359 static void noinline
3360 periodic_recalc (EV_P_ ev_periodic *w)
3362 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3363 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3365 /* the above almost always errs on the low side */
3366 while (at <= ev_rt_now)
3368 ev_tstamp nat = at + w->interval;
3370 /* when resolution fails us, we use ev_rt_now */
3371 if (expect_false (nat == at))
3383 /* make periodics pending */
3385 periodics_reify (EV_P)
3389 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
3393 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
3395 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
3397 /* first reschedule or stop timer */
3398 if (w->reschedule_cb)
3400 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3402 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
3404 ANHE_at_cache (periodics [HEAP0]);
3405 downheap (periodics, periodiccnt, HEAP0);
3407 else if (w->interval)
3409 periodic_recalc (EV_A_ w);
3410 ANHE_at_cache (periodics [HEAP0]);
3411 downheap (periodics, periodiccnt, HEAP0);
3414 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
3417 feed_reverse (EV_A_ (W)w);
3419 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
3421 feed_reverse_done (EV_A_ EV_PERIODIC);
3425 /* simply recalculate all periodics */
3426 /* TODO: maybe ensure that at least one event happens when jumping forward? */
3427 static void noinline ecb_cold
3428 periodics_reschedule (EV_P)
3432 /* adjust periodics after time jump */
3433 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
3435 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
3437 if (w->reschedule_cb)
3438 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3439 else if (w->interval)
3440 periodic_recalc (EV_A_ w);
3442 ANHE_at_cache (periodics [i]);
3445 reheap (periodics, periodiccnt);
3449 /* adjust all timers by a given offset */
3450 static void noinline ecb_cold
3451 timers_reschedule (EV_P_ ev_tstamp adjust)
3455 for (i = 0; i < timercnt; ++i)
3457 ANHE *he = timers + i + HEAP0;
3458 ANHE_w (*he)->at += adjust;
3459 ANHE_at_cache (*he);
3463 /* fetch new monotonic and realtime times from the kernel */
3464 /* also detect if there was a timejump, and act accordingly */
3466 time_update (EV_P_ ev_tstamp max_block)
3468 #if EV_USE_MONOTONIC
3469 if (expect_true (have_monotonic))
3472 ev_tstamp odiff = rtmn_diff;
3474 mn_now = get_clock ();
3476 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
3477 /* interpolate in the meantime */
3478 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
3480 ev_rt_now = rtmn_diff + mn_now;
3485 ev_rt_now = ev_time ();
3487 /* loop a few times, before making important decisions.
3488 * on the choice of "4": one iteration isn't enough,
3489 * in case we get preempted during the calls to
3490 * ev_time and get_clock. a second call is almost guaranteed
3491 * to succeed in that case, though. and looping a few more times
3492 * doesn't hurt either as we only do this on time-jumps or
3493 * in the unlikely event of having been preempted here.
3498 rtmn_diff = ev_rt_now - mn_now;
3500 diff = odiff - rtmn_diff;
3502 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
3503 return; /* all is well */
3505 ev_rt_now = ev_time ();
3506 mn_now = get_clock ();
3510 /* no timer adjustment, as the monotonic clock doesn't jump */
3511 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
3512 # if EV_PERIODIC_ENABLE
3513 periodics_reschedule (EV_A);
3519 ev_rt_now = ev_time ();
3521 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
3523 /* adjust timers. this is easy, as the offset is the same for all of them */
3524 timers_reschedule (EV_A_ ev_rt_now - mn_now);
3525 #if EV_PERIODIC_ENABLE
3526 periodics_reschedule (EV_A);
3535 ev_run (EV_P_ int flags)
3541 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3543 loop_done = EVBREAK_CANCEL;
3545 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
3554 if (expect_false (curpid)) /* penalise the forking check even more */
3555 if (expect_false (getpid () != curpid))
3563 /* we might have forked, so queue fork handlers */
3564 if (expect_false (postfork))
3567 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
3572 #if EV_PREPARE_ENABLE
3573 /* queue prepare watchers (and execute them) */
3574 if (expect_false (preparecnt))
3576 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
3581 if (expect_false (loop_done))
3584 /* we might have forked, so reify kernel state if necessary */
3585 if (expect_false (postfork))
3588 /* update fd-related kernel structures */
3591 /* calculate blocking time */
3593 ev_tstamp waittime = 0.;
3594 ev_tstamp sleeptime = 0.;
3596 /* remember old timestamp for io_blocktime calculation */
3597 ev_tstamp prev_mn_now = mn_now;
3599 /* update time to cancel out callback processing overhead */
3600 time_update (EV_A_ 1e100);
3602 /* from now on, we want a pipe-wake-up */
3603 pipe_write_wanted = 1;
3605 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3607 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
3609 waittime = MAX_BLOCKTIME;
3613 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
3614 if (waittime > to) waittime = to;
3617 #if EV_PERIODIC_ENABLE
3620 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
3621 if (waittime > to) waittime = to;
3625 /* don't let timeouts decrease the waittime below timeout_blocktime */
3626 if (expect_false (waittime < timeout_blocktime))
3627 waittime = timeout_blocktime;
3629 /* at this point, we NEED to wait, so we have to ensure */
3630 /* to pass a minimum nonzero value to the backend */
3631 if (expect_false (waittime < backend_mintime))
3632 waittime = backend_mintime;
3634 /* extra check because io_blocktime is commonly 0 */
3635 if (expect_false (io_blocktime))
3637 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3639 if (sleeptime > waittime - backend_mintime)
3640 sleeptime = waittime - backend_mintime;
3642 if (expect_true (sleeptime > 0.))
3644 ev_sleep (sleeptime);
3645 waittime -= sleeptime;
3653 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
3654 backend_poll (EV_A_ waittime);
3655 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3657 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3659 ECB_MEMORY_FENCE_ACQUIRE;
3660 if (pipe_write_skipped)
3662 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3663 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3667 /* update ev_rt_now, do magic */
3668 time_update (EV_A_ waittime + sleeptime);
3671 /* queue pending timers and reschedule them */
3672 timers_reify (EV_A); /* relative timers called last */
3673 #if EV_PERIODIC_ENABLE
3674 periodics_reify (EV_A); /* absolute timers called first */
3678 /* queue idle watchers unless other events are pending */
3683 /* queue check watchers, to be executed first */
3684 if (expect_false (checkcnt))
3685 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3690 while (expect_true (
3693 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3696 if (loop_done == EVBREAK_ONE)
3697 loop_done = EVBREAK_CANCEL;
3707 ev_break (EV_P_ int how) EV_THROW
3713 ev_ref (EV_P) EV_THROW
3719 ev_unref (EV_P) EV_THROW
3725 ev_now_update (EV_P) EV_THROW
3727 time_update (EV_A_ 1e100);
3731 ev_suspend (EV_P) EV_THROW
3733 ev_now_update (EV_A);
3737 ev_resume (EV_P) EV_THROW
3739 ev_tstamp mn_prev = mn_now;
3741 ev_now_update (EV_A);
3742 timers_reschedule (EV_A_ mn_now - mn_prev);
3743 #if EV_PERIODIC_ENABLE
3744 /* TODO: really do this? */
3745 periodics_reschedule (EV_A);
3749 /*****************************************************************************/
3750 /* singly-linked list management, used when the expected list length is short */
3753 wlist_add (WL *head, WL elem)
3760 wlist_del (WL *head, WL elem)
3764 if (expect_true (*head == elem))
3770 head = &(*head)->next;
3774 /* internal, faster, version of ev_clear_pending */
3776 clear_pending (EV_P_ W w)
3780 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
3786 ev_clear_pending (EV_P_ void *w) EV_THROW
3789 int pending = w_->pending;
3791 if (expect_true (pending))
3793 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3794 p->w = (W)&pending_w;
3803 pri_adjust (EV_P_ W w)
3805 int pri = ev_priority (w);
3806 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3807 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3808 ev_set_priority (w, pri);
3812 ev_start (EV_P_ W w, int active)
3814 pri_adjust (EV_A_ w);
3826 /*****************************************************************************/
3829 ev_io_start (EV_P_ ev_io *w) EV_THROW
3833 if (expect_false (ev_is_active (w)))
3836 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3837 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3841 ev_start (EV_A_ (W)w, 1);
3842 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
3843 wlist_add (&anfds[fd].head, (WL)w);
3845 /* common bug, apparently */
3846 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3848 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3849 w->events &= ~EV__IOFDSET;
3855 ev_io_stop (EV_P_ ev_io *w) EV_THROW
3857 clear_pending (EV_A_ (W)w);
3858 if (expect_false (!ev_is_active (w)))
3861 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3865 wlist_del (&anfds[w->fd].head, (WL)w);
3866 ev_stop (EV_A_ (W)w);
3868 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3874 ev_timer_start (EV_P_ ev_timer *w) EV_THROW
3876 if (expect_false (ev_is_active (w)))
3879 ev_at (w) += mn_now;
3881 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
3886 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
3887 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
3888 ANHE_w (timers [ev_active (w)]) = (WT)w;
3889 ANHE_at_cache (timers [ev_active (w)]);
3890 upheap (timers, ev_active (w));
3894 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
3898 ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
3900 clear_pending (EV_A_ (W)w);
3901 if (expect_false (!ev_is_active (w)))
3907 int active = ev_active (w);
3909 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3913 if (expect_true (active < timercnt + HEAP0))
3915 timers [active] = timers [timercnt + HEAP0];
3916 adjustheap (timers, timercnt, active);
3920 ev_at (w) -= mn_now;
3922 ev_stop (EV_A_ (W)w);
3928 ev_timer_again (EV_P_ ev_timer *w) EV_THROW
3932 clear_pending (EV_A_ (W)w);
3934 if (ev_is_active (w))
3938 ev_at (w) = mn_now + w->repeat;
3939 ANHE_at_cache (timers [ev_active (w)]);
3940 adjustheap (timers, timercnt, ev_active (w));
3943 ev_timer_stop (EV_A_ w);
3947 ev_at (w) = w->repeat;
3948 ev_timer_start (EV_A_ w);
3955 ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3957 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3960 #if EV_PERIODIC_ENABLE
3962 ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
3964 if (expect_false (ev_is_active (w)))
3967 if (w->reschedule_cb)
3968 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3969 else if (w->interval)
3971 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
3972 periodic_recalc (EV_A_ w);
3975 ev_at (w) = w->offset;
3980 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
3981 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
3982 ANHE_w (periodics [ev_active (w)]) = (WT)w;
3983 ANHE_at_cache (periodics [ev_active (w)]);
3984 upheap (periodics, ev_active (w));
3988 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
3992 ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
3994 clear_pending (EV_A_ (W)w);
3995 if (expect_false (!ev_is_active (w)))
4001 int active = ev_active (w);
4003 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
4007 if (expect_true (active < periodiccnt + HEAP0))
4009 periodics [active] = periodics [periodiccnt + HEAP0];
4010 adjustheap (periodics, periodiccnt, active);
4014 ev_stop (EV_A_ (W)w);
4020 ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
4022 /* TODO: use adjustheap and recalculation */
4023 ev_periodic_stop (EV_A_ w);
4024 ev_periodic_start (EV_A_ w);
4029 # define SA_RESTART 0
4032 #if EV_SIGNAL_ENABLE
4035 ev_signal_start (EV_P_ ev_signal *w) EV_THROW
4037 if (expect_false (ev_is_active (w)))
4040 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
4043 assert (("libev: a signal must not be attached to two different loops",
4044 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
4046 signals [w->signum - 1].loop = EV_A;
4047 ECB_MEMORY_FENCE_RELEASE;
4055 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
4056 if (sigfd < 0 && errno == EINVAL)
4057 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
4061 fd_intern (sigfd); /* doing it twice will not hurt */
4063 sigemptyset (&sigfd_set);
4065 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
4066 ev_set_priority (&sigfd_w, EV_MAXPRI);
4067 ev_io_start (EV_A_ &sigfd_w);
4068 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
4074 /* TODO: check .head */
4075 sigaddset (&sigfd_set, w->signum);
4076 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
4078 signalfd (sigfd, &sigfd_set, 0);
4082 ev_start (EV_A_ (W)w, 1);
4083 wlist_add (&signals [w->signum - 1].head, (WL)w);
4086 # if EV_USE_SIGNALFD
4087 if (sigfd < 0) /*TODO*/
4093 signal (w->signum, ev_sighandler);
4095 struct sigaction sa;
4099 sa.sa_handler = ev_sighandler;
4100 sigfillset (&sa.sa_mask);
4101 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
4102 sigaction (w->signum, &sa, 0);
4104 if (origflags & EVFLAG_NOSIGMASK)
4106 sigemptyset (&sa.sa_mask);
4107 sigaddset (&sa.sa_mask, w->signum);
4108 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4117 ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
4119 clear_pending (EV_A_ (W)w);
4120 if (expect_false (!ev_is_active (w)))
4125 wlist_del (&signals [w->signum - 1].head, (WL)w);
4126 ev_stop (EV_A_ (W)w);
4128 if (!signals [w->signum - 1].head)
4131 signals [w->signum - 1].loop = 0; /* unattach from signal */
4139 sigaddset (&ss, w->signum);
4140 sigdelset (&sigfd_set, w->signum);
4142 signalfd (sigfd, &sigfd_set, 0);
4143 sigprocmask (SIG_UNBLOCK, &ss, 0);
4147 signal (w->signum, SIG_DFL);
4158 ev_child_start (EV_P_ ev_child *w) EV_THROW
4161 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
4163 if (expect_false (ev_is_active (w)))
4168 ev_start (EV_A_ (W)w, 1);
4169 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
4175 ev_child_stop (EV_P_ ev_child *w) EV_THROW
4177 clear_pending (EV_A_ (W)w);
4178 if (expect_false (!ev_is_active (w)))
4183 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
4184 ev_stop (EV_A_ (W)w);
4195 # define lstat(a,b) _stati64 (a,b)
4198 #define DEF_STAT_INTERVAL 5.0074891
4199 #define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
4200 #define MIN_STAT_INTERVAL 0.1074891
4202 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
4206 /* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
4207 # define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
4209 static void noinline
4210 infy_add (EV_P_ ev_stat *w)
4212 w->wd = inotify_add_watch (fs_fd, w->path,
4213 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4214 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4215 | IN_DONT_FOLLOW | IN_MASK_ADD);
4221 /* now local changes will be tracked by inotify, but remote changes won't */
4222 /* unless the filesystem is known to be local, we therefore still poll */
4223 /* also do poll on <2.6.25, but with normal frequency */
4226 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4227 else if (!statfs (w->path, &sfs)
4228 && (sfs.f_type == 0x1373 /* devfs */
4229 || sfs.f_type == 0x4006 /* fat */
4230 || sfs.f_type == 0x4d44 /* msdos */
4231 || sfs.f_type == 0xEF53 /* ext2/3 */
4232 || sfs.f_type == 0x72b6 /* jffs2 */
4233 || sfs.f_type == 0x858458f6 /* ramfs */
4234 || sfs.f_type == 0x5346544e /* ntfs */
4235 || sfs.f_type == 0x3153464a /* jfs */
4236 || sfs.f_type == 0x9123683e /* btrfs */
4237 || sfs.f_type == 0x52654973 /* reiser3 */
4238 || sfs.f_type == 0x01021994 /* tmpfs */
4239 || sfs.f_type == 0x58465342 /* xfs */))
4240 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4242 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
4246 /* can't use inotify, continue to stat */
4247 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4249 /* if path is not there, monitor some parent directory for speedup hints */
4250 /* note that exceeding the hardcoded path limit is not a correctness issue, */
4251 /* but an efficiency issue only */
4252 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
4255 strcpy (path, w->path);
4259 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
4260 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
4262 char *pend = strrchr (path, '/');
4264 if (!pend || pend == path)
4268 w->wd = inotify_add_watch (fs_fd, path, mask);
4270 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
4275 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4277 /* now re-arm timer, if required */
4278 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4279 ev_timer_again (EV_A_ &w->timer);
4280 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4283 static void noinline
4284 infy_del (EV_P_ ev_stat *w)
4293 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
4294 wlist_del (&fs_hash [slot].head, (WL)w);
4296 /* remove this watcher, if others are watching it, they will rearm */
4297 inotify_rm_watch (fs_fd, wd);
4300 static void noinline
4301 infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
4304 /* overflow, need to check for all hash slots */
4305 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
4306 infy_wd (EV_A_ slot, wd, ev);
4311 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
4313 ev_stat *w = (ev_stat *)w_;
4314 w_ = w_->next; /* lets us remove this watcher and all before it */
4316 if (w->wd == wd || wd == -1)
4318 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
4320 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4322 infy_add (EV_A_ w); /* re-add, no matter what */
4325 stat_timer_cb (EV_A_ &w->timer, 0);
4332 infy_cb (EV_P_ ev_io *w, int revents)
4334 char buf [EV_INOTIFY_BUFSIZE];
4336 int len = read (fs_fd, buf, sizeof (buf));
4338 for (ofs = 0; ofs < len; )
4340 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
4341 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4342 ofs += sizeof (struct inotify_event) + ev->len;
4346 inline_size void ecb_cold
4347 ev_check_2625 (EV_P)
4349 /* kernels < 2.6.25 are borked
4350 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4352 if (ev_linux_version () < 0x020619)
4361 #if defined IN_CLOEXEC && defined IN_NONBLOCK
4362 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4366 return inotify_init ();
4377 ev_check_2625 (EV_A);
4379 fs_fd = infy_newfd ();
4384 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
4385 ev_set_priority (&fs_w, EV_MAXPRI);
4386 ev_io_start (EV_A_ &fs_w);
4400 ev_io_stop (EV_A_ &fs_w);
4402 fs_fd = infy_newfd ();
4407 ev_io_set (&fs_w, fs_fd, EV_READ);
4408 ev_io_start (EV_A_ &fs_w);
4412 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
4414 WL w_ = fs_hash [slot].head;
4415 fs_hash [slot].head = 0;
4419 ev_stat *w = (ev_stat *)w_;
4420 w_ = w_->next; /* lets us add this watcher */
4425 infy_add (EV_A_ w); /* re-add, no matter what */
4428 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4429 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4430 ev_timer_again (EV_A_ &w->timer);
4431 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4440 # define EV_LSTAT(p,b) _stati64 (p, b)
4442 # define EV_LSTAT(p,b) lstat (p, b)
4446 ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
4448 if (lstat (w->path, &w->attr) < 0)
4449 w->attr.st_nlink = 0;
4450 else if (!w->attr.st_nlink)
4451 w->attr.st_nlink = 1;
4454 static void noinline
4455 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
4457 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
4459 ev_statdata prev = w->attr;
4460 ev_stat_stat (EV_A_ w);
4462 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
4464 prev.st_dev != w->attr.st_dev
4465 || prev.st_ino != w->attr.st_ino
4466 || prev.st_mode != w->attr.st_mode
4467 || prev.st_nlink != w->attr.st_nlink
4468 || prev.st_uid != w->attr.st_uid
4469 || prev.st_gid != w->attr.st_gid
4470 || prev.st_rdev != w->attr.st_rdev
4471 || prev.st_size != w->attr.st_size
4472 || prev.st_atime != w->attr.st_atime
4473 || prev.st_mtime != w->attr.st_mtime
4474 || prev.st_ctime != w->attr.st_ctime
4476 /* we only update w->prev on actual differences */
4477 /* in case we test more often than invoke the callback, */
4478 /* to ensure that prev is always different to attr */
4486 ev_stat_stat (EV_A_ w); /* avoid race... */
4490 ev_feed_event (EV_A_ w, EV_STAT);
4495 ev_stat_start (EV_P_ ev_stat *w) EV_THROW
4497 if (expect_false (ev_is_active (w)))
4500 ev_stat_stat (EV_A_ w);
4502 if (w->interval < MIN_STAT_INTERVAL && w->interval)
4503 w->interval = MIN_STAT_INTERVAL;
4505 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
4506 ev_set_priority (&w->timer, ev_priority (w));
4516 ev_timer_again (EV_A_ &w->timer);
4520 ev_start (EV_A_ (W)w, 1);
4526 ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
4528 clear_pending (EV_A_ (W)w);
4529 if (expect_false (!ev_is_active (w)))
4538 if (ev_is_active (&w->timer))
4541 ev_timer_stop (EV_A_ &w->timer);
4544 ev_stop (EV_A_ (W)w);
4552 ev_idle_start (EV_P_ ev_idle *w) EV_THROW
4554 if (expect_false (ev_is_active (w)))
4557 pri_adjust (EV_A_ (W)w);
4562 int active = ++idlecnt [ABSPRI (w)];
4565 ev_start (EV_A_ (W)w, active);
4567 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
4568 idles [ABSPRI (w)][active - 1] = w;
4575 ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
4577 clear_pending (EV_A_ (W)w);
4578 if (expect_false (!ev_is_active (w)))
4584 int active = ev_active (w);
4586 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
4587 ev_active (idles [ABSPRI (w)][active - 1]) = active;
4589 ev_stop (EV_A_ (W)w);
4597 #if EV_PREPARE_ENABLE
4599 ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
4601 if (expect_false (ev_is_active (w)))
4606 ev_start (EV_A_ (W)w, ++preparecnt);
4607 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
4608 prepares [preparecnt - 1] = w;
4614 ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
4616 clear_pending (EV_A_ (W)w);
4617 if (expect_false (!ev_is_active (w)))
4623 int active = ev_active (w);
4625 prepares [active - 1] = prepares [--preparecnt];
4626 ev_active (prepares [active - 1]) = active;
4629 ev_stop (EV_A_ (W)w);
4637 ev_check_start (EV_P_ ev_check *w) EV_THROW
4639 if (expect_false (ev_is_active (w)))
4644 ev_start (EV_A_ (W)w, ++checkcnt);
4645 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
4646 checks [checkcnt - 1] = w;
4652 ev_check_stop (EV_P_ ev_check *w) EV_THROW
4654 clear_pending (EV_A_ (W)w);
4655 if (expect_false (!ev_is_active (w)))
4661 int active = ev_active (w);
4663 checks [active - 1] = checks [--checkcnt];
4664 ev_active (checks [active - 1]) = active;
4667 ev_stop (EV_A_ (W)w);
4675 ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
4677 ev_run (w->other, EVRUN_NOWAIT);
4681 embed_io_cb (EV_P_ ev_io *io, int revents)
4683 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
4686 ev_feed_event (EV_A_ (W)w, EV_EMBED);
4688 ev_run (w->other, EVRUN_NOWAIT);
4692 embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4694 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4702 ev_run (EV_A_ EVRUN_NOWAIT);
4708 embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4710 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4712 ev_embed_stop (EV_A_ w);
4717 ev_loop_fork (EV_A);
4718 ev_run (EV_A_ EVRUN_NOWAIT);
4721 ev_embed_start (EV_A_ w);
4726 embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4728 ev_idle_stop (EV_A_ idle);
4733 ev_embed_start (EV_P_ ev_embed *w) EV_THROW
4735 if (expect_false (ev_is_active (w)))
4740 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4741 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4746 ev_set_priority (&w->io, ev_priority (w));
4747 ev_io_start (EV_A_ &w->io);
4749 ev_prepare_init (&w->prepare, embed_prepare_cb);
4750 ev_set_priority (&w->prepare, EV_MINPRI);
4751 ev_prepare_start (EV_A_ &w->prepare);
4753 ev_fork_init (&w->fork, embed_fork_cb);
4754 ev_fork_start (EV_A_ &w->fork);
4756 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4758 ev_start (EV_A_ (W)w, 1);
4764 ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
4766 clear_pending (EV_A_ (W)w);
4767 if (expect_false (!ev_is_active (w)))
4772 ev_io_stop (EV_A_ &w->io);
4773 ev_prepare_stop (EV_A_ &w->prepare);
4774 ev_fork_stop (EV_A_ &w->fork);
4776 ev_stop (EV_A_ (W)w);
4784 ev_fork_start (EV_P_ ev_fork *w) EV_THROW
4786 if (expect_false (ev_is_active (w)))
4791 ev_start (EV_A_ (W)w, ++forkcnt);
4792 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4793 forks [forkcnt - 1] = w;
4799 ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
4801 clear_pending (EV_A_ (W)w);
4802 if (expect_false (!ev_is_active (w)))
4808 int active = ev_active (w);
4810 forks [active - 1] = forks [--forkcnt];
4811 ev_active (forks [active - 1]) = active;
4814 ev_stop (EV_A_ (W)w);
4820 #if EV_CLEANUP_ENABLE
4822 ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4824 if (expect_false (ev_is_active (w)))
4829 ev_start (EV_A_ (W)w, ++cleanupcnt);
4830 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4831 cleanups [cleanupcnt - 1] = w;
4833 /* cleanup watchers should never keep a refcount on the loop */
4839 ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4841 clear_pending (EV_A_ (W)w);
4842 if (expect_false (!ev_is_active (w)))
4849 int active = ev_active (w);
4851 cleanups [active - 1] = cleanups [--cleanupcnt];
4852 ev_active (cleanups [active - 1]) = active;
4855 ev_stop (EV_A_ (W)w);
4863 ev_async_start (EV_P_ ev_async *w) EV_THROW
4865 if (expect_false (ev_is_active (w)))
4874 ev_start (EV_A_ (W)w, ++asynccnt);
4875 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4876 asyncs [asynccnt - 1] = w;
4882 ev_async_stop (EV_P_ ev_async *w) EV_THROW
4884 clear_pending (EV_A_ (W)w);
4885 if (expect_false (!ev_is_active (w)))
4891 int active = ev_active (w);
4893 asyncs [active - 1] = asyncs [--asynccnt];
4894 ev_active (asyncs [active - 1]) = active;
4897 ev_stop (EV_A_ (W)w);
4903 ev_async_send (EV_P_ ev_async *w) EV_THROW
4906 evpipe_write (EV_A_ &async_pending);
4910 /*****************************************************************************/
4916 void (*cb)(int revents, void *arg);
4921 once_cb (EV_P_ struct ev_once *once, int revents)
4923 void (*cb)(int revents, void *arg) = once->cb;
4924 void *arg = once->arg;
4926 ev_io_stop (EV_A_ &once->io);
4927 ev_timer_stop (EV_A_ &once->to);
4934 once_cb_io (EV_P_ ev_io *w, int revents)
4936 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4938 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
4942 once_cb_to (EV_P_ ev_timer *w, int revents)
4944 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4946 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
4950 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
4952 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
4954 if (expect_false (!once))
4956 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
4963 ev_init (&once->io, once_cb_io);
4966 ev_io_set (&once->io, fd, events);
4967 ev_io_start (EV_A_ &once->io);
4970 ev_init (&once->to, once_cb_to);
4973 ev_timer_set (&once->to, timeout, 0.);
4974 ev_timer_start (EV_A_ &once->to);
4978 /*****************************************************************************/
4982 ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4985 ev_watcher_list *wl, *wn;
4987 if (types & (EV_IO | EV_EMBED))
4988 for (i = 0; i < anfdmax; ++i)
4989 for (wl = anfds [i].head; wl; )
4994 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4996 if (types & EV_EMBED)
4997 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
5002 if (ev_cb ((ev_io *)wl) == infy_cb)
5006 if ((ev_io *)wl != &pipe_w)
5008 cb (EV_A_ EV_IO, wl);
5013 if (types & (EV_TIMER | EV_STAT))
5014 for (i = timercnt + HEAP0; i-- > HEAP0; )
5016 /*TODO: timer is not always active*/
5017 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
5019 if (types & EV_STAT)
5020 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
5024 if (types & EV_TIMER)
5025 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
5027 #if EV_PERIODIC_ENABLE
5028 if (types & EV_PERIODIC)
5029 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
5030 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
5034 if (types & EV_IDLE)
5035 for (j = NUMPRI; j--; )
5036 for (i = idlecnt [j]; i--; )
5037 cb (EV_A_ EV_IDLE, idles [j][i]);
5041 if (types & EV_FORK)
5042 for (i = forkcnt; i--; )
5043 if (ev_cb (forks [i]) != embed_fork_cb)
5044 cb (EV_A_ EV_FORK, forks [i]);
5048 if (types & EV_ASYNC)
5049 for (i = asynccnt; i--; )
5050 cb (EV_A_ EV_ASYNC, asyncs [i]);
5053 #if EV_PREPARE_ENABLE
5054 if (types & EV_PREPARE)
5055 for (i = preparecnt; i--; )
5056 # if EV_EMBED_ENABLE
5057 if (ev_cb (prepares [i]) != embed_prepare_cb)
5059 cb (EV_A_ EV_PREPARE, prepares [i]);
5063 if (types & EV_CHECK)
5064 for (i = checkcnt; i--; )
5065 cb (EV_A_ EV_CHECK, checks [i]);
5068 #if EV_SIGNAL_ENABLE
5069 if (types & EV_SIGNAL)
5070 for (i = 0; i < EV_NSIG - 1; ++i)
5071 for (wl = signals [i].head; wl; )
5074 cb (EV_A_ EV_SIGNAL, wl);
5080 if (types & EV_CHILD)
5081 for (i = (EV_PID_HASHSIZE); i--; )
5082 for (wl = childs [i]; wl; )
5085 cb (EV_A_ EV_CHILD, wl);
5089 /* EV_STAT 0x00001000 /* stat data changed */
5090 /* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
5095 #include "ev_wrap.h"