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 0x00010004
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 UINTMAX_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>
652 #ifndef ECB_MEMORY_FENCE
653 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
654 #if __i386 || __i386__
655 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
656 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
657 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
659 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
660 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
661 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
662 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
663 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
664 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
665 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
666 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
667 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
668 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
669 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
671 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
672 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
673 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
674 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
675 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
676 #elif defined __s390__ || defined __s390x__
677 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
678 #elif defined __mips__
679 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
680 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
681 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
682 #elif defined __alpha__
683 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
684 #elif defined __hppa__
685 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
686 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
687 #elif defined __ia64__
688 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
689 #elif defined __m68k__
690 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
691 #elif defined __m88k__
692 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
694 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
699 #ifndef ECB_MEMORY_FENCE
700 #if ECB_GCC_VERSION(4,7)
701 /* see comment below (stdatomic.h) about the C11 memory model. */
702 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
703 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
704 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
706 #elif ECB_CLANG_EXTENSION(c_atomic)
707 /* see comment below (stdatomic.h) about the C11 memory model. */
708 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
709 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
710 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
712 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
713 #define ECB_MEMORY_FENCE __sync_synchronize ()
714 #elif _MSC_VER >= 1500 /* VC++ 2008 */
715 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
716 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
717 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
718 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
719 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
720 #elif _MSC_VER >= 1400 /* VC++ 2005 */
721 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
722 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
723 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
724 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
727 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
728 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
729 #include <mbarrier.h>
730 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
731 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
732 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
734 #define ECB_MEMORY_FENCE __sync ()
738 #ifndef ECB_MEMORY_FENCE
739 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
740 /* we assume that these memory fences work on all variables/all memory accesses, */
741 /* not just C11 atomics and atomic accesses */
742 #include <stdatomic.h>
743 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
744 /* any fence other than seq_cst, which isn't very efficient for us. */
745 /* Why that is, we don't know - either the C11 memory model is quite useless */
746 /* for most usages, or gcc and clang have a bug */
747 /* I *currently* lean towards the latter, and inefficiently implement */
748 /* all three of ecb's fences as a seq_cst fence */
749 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
750 /* for all __atomic_thread_fence's except seq_cst */
751 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
755 #ifndef ECB_MEMORY_FENCE
756 #if !ECB_AVOID_PTHREADS
758 * if you get undefined symbol references to pthread_mutex_lock,
759 * or failure to find pthread.h, then you should implement
760 * the ECB_MEMORY_FENCE operations for your cpu/compiler
761 * OR provide pthread.h and link against the posix thread library
765 #define ECB_NEEDS_PTHREADS 1
766 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
768 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
769 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
773 #if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
774 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
777 #if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
778 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
781 /*****************************************************************************/
784 #define ecb_inline static inline
785 #elif ECB_GCC_VERSION(2,5)
786 #define ecb_inline static __inline__
788 #define ecb_inline static inline
790 #define ecb_inline static
793 #if ECB_GCC_VERSION(3,3)
794 #define ecb_restrict __restrict__
796 #define ecb_restrict restrict
801 typedef int ecb_bool;
803 #define ECB_CONCAT_(a, b) a ## b
804 #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
805 #define ECB_STRINGIFY_(a) # a
806 #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
807 #define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
809 #define ecb_function_ ecb_inline
811 #if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
812 #define ecb_attribute(attrlist) __attribute__ (attrlist)
814 #define ecb_attribute(attrlist)
817 #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
818 #define ecb_is_constant(expr) __builtin_constant_p (expr)
820 /* possible C11 impl for integral types
821 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
822 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
824 #define ecb_is_constant(expr) 0
827 #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
828 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
830 #define ecb_expect(expr,value) (expr)
833 #if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
834 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
836 #define ecb_prefetch(addr,rw,locality)
839 /* no emulation for ecb_decltype */
841 // older implementations might have problems with decltype(x)::type, work around it
842 template<class T> struct ecb_decltype_t { typedef T type; };
843 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
844 #elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
845 #define ecb_decltype(x) __typeof__ (x)
849 #define ecb_deprecated __declspec (deprecated)
851 #define ecb_deprecated ecb_attribute ((__deprecated__))
855 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
856 #elif ECB_GCC_VERSION(4,5)
857 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
859 #define ecb_deprecated_message(msg) ecb_deprecated
863 #define ecb_noinline __declspec (noinline)
865 #define ecb_noinline ecb_attribute ((__noinline__))
868 #define ecb_unused ecb_attribute ((__unused__))
869 #define ecb_const ecb_attribute ((__const__))
870 #define ecb_pure ecb_attribute ((__pure__))
872 #if ECB_C11 || __IBMC_NORETURN
873 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
874 #define ecb_noreturn _Noreturn
876 #define ecb_noreturn [[noreturn]]
877 #elif _MSC_VER >= 1200
878 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
879 #define ecb_noreturn __declspec (noreturn)
881 #define ecb_noreturn ecb_attribute ((__noreturn__))
884 #if ECB_GCC_VERSION(4,3)
885 #define ecb_artificial ecb_attribute ((__artificial__))
886 #define ecb_hot ecb_attribute ((__hot__))
887 #define ecb_cold ecb_attribute ((__cold__))
889 #define ecb_artificial
894 /* put around conditional expressions if you are very sure that the */
895 /* expression is mostly true or mostly false. note that these return */
896 /* booleans, not the expression. */
897 #define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
898 #define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
899 /* for compatibility to the rest of the world */
900 #define ecb_likely(expr) ecb_expect_true (expr)
901 #define ecb_unlikely(expr) ecb_expect_false (expr)
903 /* count trailing zero bits and count # of one bits */
904 #if ECB_GCC_VERSION(3,4) \
905 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
906 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
907 && ECB_CLANG_BUILTIN(__builtin_popcount))
908 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
909 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
910 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
911 #define ecb_ctz32(x) __builtin_ctz (x)
912 #define ecb_ctz64(x) __builtin_ctzll (x)
913 #define ecb_popcount32(x) __builtin_popcount (x)
916 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
917 ecb_function_ ecb_const int
918 ecb_ctz32 (uint32_t x)
922 x &= ~x + 1; /* this isolates the lowest bit */
924 #if ECB_branchless_on_i386
925 r += !!(x & 0xaaaaaaaa) << 0;
926 r += !!(x & 0xcccccccc) << 1;
927 r += !!(x & 0xf0f0f0f0) << 2;
928 r += !!(x & 0xff00ff00) << 3;
929 r += !!(x & 0xffff0000) << 4;
931 if (x & 0xaaaaaaaa) r += 1;
932 if (x & 0xcccccccc) r += 2;
933 if (x & 0xf0f0f0f0) r += 4;
934 if (x & 0xff00ff00) r += 8;
935 if (x & 0xffff0000) r += 16;
941 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
942 ecb_function_ ecb_const int
943 ecb_ctz64 (uint64_t x)
945 int shift = x & 0xffffffffU ? 0 : 32;
946 return ecb_ctz32 (x >> shift) + shift;
949 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
950 ecb_function_ ecb_const int
951 ecb_popcount32 (uint32_t x)
953 x -= (x >> 1) & 0x55555555;
954 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
955 x = ((x >> 4) + x) & 0x0f0f0f0f;
961 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
962 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
966 if (x >> 16) { x >>= 16; r += 16; }
967 if (x >> 8) { x >>= 8; r += 8; }
968 if (x >> 4) { x >>= 4; r += 4; }
969 if (x >> 2) { x >>= 2; r += 2; }
970 if (x >> 1) { r += 1; }
975 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
976 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
980 if (x >> 32) { x >>= 32; r += 32; }
982 return r + ecb_ld32 (x);
986 ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
987 ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
988 ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
989 ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
991 ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
992 ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
994 return ( (x * 0x0802U & 0x22110U)
995 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
998 ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
999 ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1001 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1002 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1003 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1004 x = ( x >> 8 ) | ( x << 8);
1009 ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1010 ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1012 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1013 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1014 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1015 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1016 x = ( x >> 16 ) | ( x << 16);
1021 /* popcount64 is only available on 64 bit cpus as gcc builtin */
1022 /* so for this version we are lazy */
1023 ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1024 ecb_function_ ecb_const int
1025 ecb_popcount64 (uint64_t x)
1027 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1030 ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1031 ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1032 ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1033 ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1034 ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1035 ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1036 ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1037 ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1039 ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1040 ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1041 ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1042 ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1043 ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1044 ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1045 ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1046 ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1048 #if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1049 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1050 #define ecb_bswap16(x) __builtin_bswap16 (x)
1052 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1054 #define ecb_bswap32(x) __builtin_bswap32 (x)
1055 #define ecb_bswap64(x) __builtin_bswap64 (x)
1058 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1059 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1060 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1062 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1063 ecb_function_ ecb_const uint16_t
1064 ecb_bswap16 (uint16_t x)
1066 return ecb_rotl16 (x, 8);
1069 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1070 ecb_function_ ecb_const uint32_t
1071 ecb_bswap32 (uint32_t x)
1073 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1076 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1077 ecb_function_ ecb_const uint64_t
1078 ecb_bswap64 (uint64_t x)
1080 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1084 #if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1085 #define ecb_unreachable() __builtin_unreachable ()
1087 /* this seems to work fine, but gcc always emits a warning for it :/ */
1088 ecb_inline ecb_noreturn void ecb_unreachable (void);
1089 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1092 /* try to tell the compiler that some condition is definitely true */
1093 #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1095 ecb_inline ecb_const unsigned char ecb_byteorder_helper (void);
1096 ecb_inline ecb_const unsigned char
1097 ecb_byteorder_helper (void)
1099 /* the union code still generates code under pressure in gcc, */
1100 /* but less than using pointers, and always seems to */
1101 /* successfully return a constant. */
1102 /* the reason why we have this horrible preprocessor mess */
1103 /* is to avoid it in all cases, at least on common architectures */
1104 /* or when using a recent enough gcc version (>= 4.6) */
1105 #if ((__i386 || __i386__) && !__VOS__) || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64
1107 #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
1109 #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
1116 } u = { 0x11223344 };
1121 ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1122 ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
1123 ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1124 ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
1126 #if ECB_GCC_VERSION(3,0) || ECB_C99
1127 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1129 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1133 template<typename T>
1134 static inline T ecb_div_rd (T val, T div)
1136 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1138 template<typename T>
1139 static inline T ecb_div_ru (T val, T div)
1141 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1144 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1145 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1148 #if ecb_cplusplus_does_not_suck
1149 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1150 template<typename T, int N>
1151 static inline int ecb_array_length (const T (&arr)[N])
1156 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1159 /*******************************************************************************/
1160 /* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1162 /* basically, everything uses "ieee pure-endian" floating point numbers */
1163 /* the only noteworthy exception is ancient armle, which uses order 43218765 */
1165 || __i386 || __i386__ \
1167 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1168 || defined __s390__ || defined __s390x__ \
1169 || defined __mips__ \
1170 || defined __alpha__ \
1171 || defined __hppa__ \
1172 || defined __ia64__ \
1173 || defined __m68k__ \
1174 || defined __m88k__ \
1176 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1177 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1178 || defined __aarch64__
1180 #include <string.h> /* for memcpy */
1187 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1189 /* only the oldest of old doesn't have this one. solaris. */
1191 #define ECB_INFINITY INFINITY
1193 #define ECB_INFINITY HUGE_VAL
1199 #define ECB_NAN ECB_INFINITY
1202 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1203 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1204 #define ecb_frexpf(x,e) frexpf ((x), (e))
1206 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1207 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1210 /* converts an ieee half/binary16 to a float */
1211 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1212 ecb_function_ ecb_const float
1213 ecb_binary16_to_float (uint16_t x)
1215 int e = (x >> 10) & 0x1f;
1219 if (!e ) r = ecb_ldexpf (m , -24);
1220 else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25);
1221 else if (m ) r = ECB_NAN;
1222 else r = ECB_INFINITY;
1224 return x & 0x8000 ? -r : r;
1227 /* convert a float to ieee single/binary32 */
1228 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1229 ecb_function_ ecb_const uint32_t
1230 ecb_float_to_binary32 (float x)
1237 /* slow emulation, works for anything but -0 */
1241 if (x == 0e0f ) return 0x00000000U;
1242 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1243 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1244 if (x != x ) return 0x7fbfffffU;
1246 m = ecb_frexpf (x, &e) * 0x1000000U;
1248 r = m & 0x80000000U;
1260 r |= (e + 126) << 23;
1267 /* converts an ieee single/binary32 to a float */
1268 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1269 ecb_function_ ecb_const float
1270 ecb_binary32_to_float (uint32_t x)
1277 /* emulation, only works for normals and subnormals and +0 */
1279 int e = (x >> 23) & 0xffU;
1288 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1289 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1297 /* convert a double to ieee double/binary64 */
1298 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1299 ecb_function_ ecb_const uint64_t
1300 ecb_double_to_binary64 (double x)
1307 /* slow emulation, works for anything but -0 */
1311 if (x == 0e0 ) return 0x0000000000000000U;
1312 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1313 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1314 if (x != x ) return 0X7ff7ffffffffffffU;
1316 m = frexp (x, &e) * 0x20000000000000U;
1318 r = m & 0x8000000000000000;;
1325 m &= 0x1fffffffffffffU;
1330 r |= ((uint64_t)(e + 1022)) << 52;
1331 r |= m & 0xfffffffffffffU;
1337 /* converts an ieee double/binary64 to a double */
1338 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1339 ecb_function_ ecb_const double
1340 ecb_binary64_to_double (uint64_t x)
1347 /* emulation, only works for normals and subnormals and +0 */
1349 int e = (x >> 52) & 0x7ffU;
1351 x &= 0xfffffffffffffU;
1354 x |= 0x10000000000000U;
1358 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1359 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1373 #if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1374 /* if your architecture doesn't need memory fences, e.g. because it is
1375 * single-cpu/core, or if you use libev in a project that doesn't use libev
1376 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1377 * libev, in which cases the memory fences become nops.
1378 * alternatively, you can remove this #error and link against libpthread,
1379 * which will then provide the memory fences.
1381 # error "memory fences not defined for your architecture, please report"
1384 #ifndef ECB_MEMORY_FENCE
1385 # define ECB_MEMORY_FENCE do { } while (0)
1386 # define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1387 # define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1390 #define expect_false(cond) ecb_expect_false (cond)
1391 #define expect_true(cond) ecb_expect_true (cond)
1392 #define noinline ecb_noinline
1394 #define inline_size ecb_inline
1397 # define inline_speed ecb_inline
1399 # define inline_speed static noinline
1402 #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1404 #if EV_MINPRI == EV_MAXPRI
1405 # define ABSPRI(w) (((W)w), 0)
1407 # define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1410 #define EMPTY /* required for microsofts broken pseudo-c compiler */
1411 #define EMPTY2(a,b) /* used to suppress some warnings */
1413 typedef ev_watcher *W;
1414 typedef ev_watcher_list *WL;
1415 typedef ev_watcher_time *WT;
1417 #define ev_active(w) ((W)(w))->active
1418 #define ev_at(w) ((WT)(w))->at
1421 /* sig_atomic_t is used to avoid per-thread variables or locking but still */
1422 /* giving it a reasonably high chance of working on typical architectures */
1423 static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1426 #if EV_USE_MONOTONIC
1427 static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1430 #ifndef EV_FD_TO_WIN32_HANDLE
1431 # define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1433 #ifndef EV_WIN32_HANDLE_TO_FD
1434 # define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1436 #ifndef EV_WIN32_CLOSE_FD
1437 # define EV_WIN32_CLOSE_FD(fd) close (fd)
1441 # include "ev_win32.c"
1444 /*****************************************************************************/
1446 /* define a suitable floor function (only used by periodics atm) */
1450 # define ev_floor(v) floor (v)
1455 /* a floor() replacement function, should be independent of ev_tstamp type */
1456 static ev_tstamp noinline
1457 ev_floor (ev_tstamp v)
1459 /* the choice of shift factor is not terribly important */
1460 #if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1461 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1463 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1466 /* argument too large for an unsigned long? */
1467 if (expect_false (v >= shift))
1472 return v; /* very large number */
1474 f = shift * ev_floor (v * (1. / shift));
1475 return f + ev_floor (v - f);
1478 /* special treatment for negative args? */
1479 if (expect_false (v < 0.))
1481 ev_tstamp f = -ev_floor (-v);
1483 return f - (f == v ? 0 : 1);
1486 /* fits into an unsigned long */
1487 return (unsigned long)v;
1492 /*****************************************************************************/
1495 # include <sys/utsname.h>
1498 static unsigned int noinline ecb_cold
1499 ev_linux_version (void)
1505 char *p = buf.release;
1510 for (i = 3+1; --i; )
1516 if (*p >= '0' && *p <= '9')
1517 c = c * 10 + *p++ - '0';
1534 /*****************************************************************************/
1537 static void noinline ecb_cold
1538 ev_printerr (const char *msg)
1540 write (STDERR_FILENO, msg, strlen (msg));
1544 static void (*syserr_cb)(const char *msg) EV_THROW;
1547 ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
1552 static void noinline ecb_cold
1553 ev_syserr (const char *msg)
1556 msg = "(libev) system error";
1565 ev_printerr (strerror (errno));
1575 ev_realloc_emul (void *ptr, long size) EV_THROW
1577 /* some systems, notably openbsd and darwin, fail to properly
1578 * implement realloc (x, 0) (as required by both ansi c-89 and
1579 * the single unix specification, so work around them here.
1580 * recently, also (at least) fedora and debian started breaking it,
1581 * despite documenting it otherwise.
1585 return realloc (ptr, size);
1591 static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
1594 ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
1600 ev_realloc (void *ptr, long size)
1602 ptr = alloc (ptr, size);
1607 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1609 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1617 #define ev_malloc(size) ev_realloc (0, (size))
1618 #define ev_free(ptr) ev_realloc ((ptr), 0)
1620 /*****************************************************************************/
1622 /* set in reify when reification needed */
1623 #define EV_ANFD_REIFY 1
1625 /* file descriptor info structure */
1629 unsigned char events; /* the events watched for */
1630 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1631 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
1632 unsigned char unused;
1634 unsigned int egen; /* generation counter to counter epoll bugs */
1636 #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1644 /* stores the pending event set for a given watcher */
1648 int events; /* the pending event set for the given watcher */
1652 /* hash table entry per inotify-id */
1660 #if EV_HEAP_CACHE_AT
1661 /* a heap element */
1667 #define ANHE_w(he) (he).w /* access watcher, read-write */
1668 #define ANHE_at(he) (he).at /* access cached at, read-only */
1669 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1671 /* a heap element */
1674 #define ANHE_w(he) (he)
1675 #define ANHE_at(he) (he)->at
1676 #define ANHE_at_cache(he)
1683 ev_tstamp ev_rt_now;
1684 #define ev_rt_now ((loop)->ev_rt_now)
1685 #define VAR(name,decl) decl;
1686 #include "ev_vars.h"
1689 #include "ev_wrap.h"
1691 static struct ev_loop default_loop_struct;
1692 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
1696 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
1697 #define VAR(name,decl) static decl;
1698 #include "ev_vars.h"
1701 static int ev_default_loop_ptr;
1706 # define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1707 # define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1708 # define EV_INVOKE_PENDING invoke_cb (EV_A)
1710 # define EV_RELEASE_CB (void)0
1711 # define EV_ACQUIRE_CB (void)0
1712 # define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1715 #define EVBREAK_RECURSE 0x80
1717 /*****************************************************************************/
1719 #ifndef EV_HAVE_EV_TIME
1721 ev_time (void) EV_THROW
1724 if (expect_true (have_realtime))
1727 clock_gettime (CLOCK_REALTIME, &ts);
1728 return ts.tv_sec + ts.tv_nsec * 1e-9;
1733 gettimeofday (&tv, 0);
1734 return tv.tv_sec + tv.tv_usec * 1e-6;
1738 inline_size ev_tstamp
1741 #if EV_USE_MONOTONIC
1742 if (expect_true (have_monotonic))
1745 clock_gettime (CLOCK_MONOTONIC, &ts);
1746 return ts.tv_sec + ts.tv_nsec * 1e-9;
1755 ev_now (EV_P) EV_THROW
1762 ev_sleep (ev_tstamp delay) EV_THROW
1766 #if EV_USE_NANOSLEEP
1769 EV_TS_SET (ts, delay);
1771 #elif defined _WIN32
1772 Sleep ((unsigned long)(delay * 1e3));
1776 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1777 /* something not guaranteed by newer posix versions, but guaranteed */
1779 EV_TV_SET (tv, delay);
1780 select (0, 0, 0, 0, &tv);
1785 /*****************************************************************************/
1787 #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1789 /* find a suitable new size for the given array, */
1790 /* hopefully by rounding to a nice-to-malloc size */
1792 array_nextsize (int elem, int cur, int cnt)
1800 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
1801 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
1804 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
1805 ncur = ncur - sizeof (void *) * 4;
1812 static void * noinline ecb_cold
1813 array_realloc (int elem, void *base, int *cur, int cnt)
1815 *cur = array_nextsize (elem, *cur, cnt);
1816 return ev_realloc (base, elem * *cur);
1819 #define array_init_zero(base,count) \
1820 memset ((void *)(base), 0, sizeof (*(base)) * (count))
1822 #define array_needsize(type,base,cur,cnt,init) \
1823 if (expect_false ((cnt) > (cur))) \
1825 int ecb_unused ocur_ = (cur); \
1826 (base) = (type *)array_realloc \
1827 (sizeof (type), (base), &(cur), (cnt)); \
1828 init ((base) + (ocur_), (cur) - ocur_); \
1832 #define array_slim(type,stem) \
1833 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
1835 stem ## max = array_roundsize (stem ## cnt >> 1); \
1836 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
1837 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
1841 #define array_free(stem, idx) \
1842 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
1844 /*****************************************************************************/
1846 /* dummy callback for pending events */
1847 static void noinline
1848 pendingcb (EV_P_ ev_prepare *w, int revents)
1853 ev_feed_event (EV_P_ void *w, int revents) EV_THROW
1856 int pri = ABSPRI (w_);
1858 if (expect_false (w_->pending))
1859 pendings [pri][w_->pending - 1].events |= revents;
1862 w_->pending = ++pendingcnt [pri];
1863 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1864 pendings [pri][w_->pending - 1].w = w_;
1865 pendings [pri][w_->pending - 1].events = revents;
1868 pendingpri = NUMPRI - 1;
1872 feed_reverse (EV_P_ W w)
1874 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1875 rfeeds [rfeedcnt++] = w;
1879 feed_reverse_done (EV_P_ int revents)
1882 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1887 queue_events (EV_P_ W *events, int eventcnt, int type)
1891 for (i = 0; i < eventcnt; ++i)
1892 ev_feed_event (EV_A_ events [i], type);
1895 /*****************************************************************************/
1898 fd_event_nocheck (EV_P_ int fd, int revents)
1900 ANFD *anfd = anfds + fd;
1903 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1905 int ev = w->events & revents;
1908 ev_feed_event (EV_A_ (W)w, ev);
1912 /* do not submit kernel events for fds that have reify set */
1913 /* because that means they changed while we were polling for new events */
1915 fd_event (EV_P_ int fd, int revents)
1917 ANFD *anfd = anfds + fd;
1919 if (expect_true (!anfd->reify))
1920 fd_event_nocheck (EV_A_ fd, revents);
1924 ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
1926 if (fd >= 0 && fd < anfdmax)
1927 fd_event_nocheck (EV_A_ fd, revents);
1930 /* make sure the external fd watch events are in-sync */
1931 /* with the kernel/libev internal state */
1937 #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1938 for (i = 0; i < fdchangecnt; ++i)
1940 int fd = fdchanges [i];
1941 ANFD *anfd = anfds + fd;
1943 if (anfd->reify & EV__IOFDSET && anfd->head)
1945 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1947 if (handle != anfd->handle)
1951 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1953 /* handle changed, but fd didn't - we need to do it in two steps */
1954 backend_modify (EV_A_ fd, anfd->events, 0);
1956 anfd->handle = handle;
1962 for (i = 0; i < fdchangecnt; ++i)
1964 int fd = fdchanges [i];
1965 ANFD *anfd = anfds + fd;
1968 unsigned char o_events = anfd->events;
1969 unsigned char o_reify = anfd->reify;
1973 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1977 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1978 anfd->events |= (unsigned char)w->events;
1980 if (o_events != anfd->events)
1981 o_reify = EV__IOFDSET; /* actually |= */
1984 if (o_reify & EV__IOFDSET)
1985 backend_modify (EV_A_ fd, o_events, anfd->events);
1991 /* something about the given fd changed */
1993 fd_change (EV_P_ int fd, int flags)
1995 unsigned char reify = anfds [fd].reify;
1996 anfds [fd].reify |= flags;
1998 if (expect_true (!reify))
2001 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
2002 fdchanges [fdchangecnt - 1] = fd;
2006 /* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
2007 inline_speed void ecb_cold
2008 fd_kill (EV_P_ int fd)
2012 while ((w = (ev_io *)anfds [fd].head))
2014 ev_io_stop (EV_A_ w);
2015 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
2019 /* check whether the given fd is actually valid, for error recovery */
2020 inline_size int ecb_cold
2024 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
2026 return fcntl (fd, F_GETFD) != -1;
2030 /* called on EBADF to verify fds */
2031 static void noinline ecb_cold
2036 for (fd = 0; fd < anfdmax; ++fd)
2037 if (anfds [fd].events)
2038 if (!fd_valid (fd) && errno == EBADF)
2042 /* called on ENOMEM in select/poll to kill some fds and retry */
2043 static void noinline ecb_cold
2048 for (fd = anfdmax; fd--; )
2049 if (anfds [fd].events)
2056 /* usually called after fork if backend needs to re-arm all fds from scratch */
2057 static void noinline
2062 for (fd = 0; fd < anfdmax; ++fd)
2063 if (anfds [fd].events)
2065 anfds [fd].events = 0;
2066 anfds [fd].emask = 0;
2067 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
2071 /* used to prepare libev internal fd's */
2072 /* this is not fork-safe */
2077 unsigned long arg = 1;
2078 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
2080 fcntl (fd, F_SETFD, FD_CLOEXEC);
2081 fcntl (fd, F_SETFL, O_NONBLOCK);
2085 /*****************************************************************************/
2088 * the heap functions want a real array index. array index 0 is guaranteed to not
2089 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
2090 * the branching factor of the d-tree.
2094 * at the moment we allow libev the luxury of two heaps,
2095 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
2096 * which is more cache-efficient.
2097 * the difference is about 5% with 50000+ watchers.
2102 #define HEAP0 (DHEAP - 1) /* index of first element in heap */
2103 #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
2104 #define UPHEAP_DONE(p,k) ((p) == (k))
2106 /* away from the root */
2108 downheap (ANHE *heap, int N, int k)
2111 ANHE *E = heap + N + HEAP0;
2117 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
2119 /* find minimum child */
2120 if (expect_true (pos + DHEAP - 1 < E))
2122 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2123 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2124 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2125 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2129 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2130 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2131 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2132 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2137 if (ANHE_at (he) <= minat)
2141 ev_active (ANHE_w (*minpos)) = k;
2147 ev_active (ANHE_w (he)) = k;
2153 #define HPARENT(k) ((k) >> 1)
2154 #define UPHEAP_DONE(p,k) (!(p))
2156 /* away from the root */
2158 downheap (ANHE *heap, int N, int k)
2169 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
2172 if (ANHE_at (he) <= ANHE_at (heap [c]))
2175 heap [k] = heap [c];
2176 ev_active (ANHE_w (heap [k])) = k;
2182 ev_active (ANHE_w (he)) = k;
2186 /* towards the root */
2188 upheap (ANHE *heap, int k)
2194 int p = HPARENT (k);
2196 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
2199 heap [k] = heap [p];
2200 ev_active (ANHE_w (heap [k])) = k;
2205 ev_active (ANHE_w (he)) = k;
2208 /* move an element suitably so it is in a correct place */
2210 adjustheap (ANHE *heap, int N, int k)
2212 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
2215 downheap (heap, N, k);
2218 /* rebuild the heap: this function is used only once and executed rarely */
2220 reheap (ANHE *heap, int N)
2224 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
2225 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
2226 for (i = 0; i < N; ++i)
2227 upheap (heap, i + HEAP0);
2230 /*****************************************************************************/
2232 /* associate signal watchers to a signal signal */
2235 EV_ATOMIC_T pending;
2242 static ANSIG signals [EV_NSIG - 1];
2244 /*****************************************************************************/
2246 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2248 static void noinline ecb_cold
2251 if (!ev_is_active (&pipe_w))
2257 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2258 if (fds [1] < 0 && errno == EINVAL)
2259 fds [1] = eventfd (0, 0);
2265 ev_syserr ("(libev) error creating signal/async pipe");
2267 fd_intern (fds [0]);
2270 evpipe [0] = fds [0];
2273 evpipe [1] = fds [1]; /* first call, set write fd */
2276 /* on subsequent calls, do not change evpipe [1] */
2277 /* so that evpipe_write can always rely on its value. */
2278 /* this branch does not do anything sensible on windows, */
2279 /* so must not be executed on windows */
2281 dup2 (fds [1], evpipe [1]);
2285 fd_intern (evpipe [1]);
2287 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2288 ev_io_start (EV_A_ &pipe_w);
2289 ev_unref (EV_A); /* watcher should not keep loop alive */
2294 evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2296 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2298 if (expect_true (*flag))
2302 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2304 pipe_write_skipped = 1;
2306 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2308 if (pipe_write_wanted)
2312 pipe_write_skipped = 0;
2313 ECB_MEMORY_FENCE_RELEASE;
2315 old_errno = errno; /* save errno because write will clobber it */
2320 uint64_t counter = 1;
2321 write (evpipe [1], &counter, sizeof (uint64_t));
2331 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2333 write (evpipe [1], &(evpipe [1]), 1);
2341 /* called whenever the libev signal pipe */
2342 /* got some events (signal, async) */
2344 pipecb (EV_P_ ev_io *iow, int revents)
2348 if (revents & EV_READ)
2354 read (evpipe [1], &counter, sizeof (uint64_t));
2365 buf.len = sizeof (dummy);
2366 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2368 read (evpipe [0], &dummy, sizeof (dummy));
2373 pipe_write_skipped = 0;
2375 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2377 #if EV_SIGNAL_ENABLE
2384 for (i = EV_NSIG - 1; i--; )
2385 if (expect_false (signals [i].pending))
2386 ev_feed_signal_event (EV_A_ i + 1);
2397 for (i = asynccnt; i--; )
2398 if (asyncs [i]->sent)
2400 asyncs [i]->sent = 0;
2401 ECB_MEMORY_FENCE_RELEASE;
2402 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
2408 /*****************************************************************************/
2411 ev_feed_signal (int signum) EV_THROW
2415 ECB_MEMORY_FENCE_ACQUIRE;
2416 EV_A = signals [signum - 1].loop;
2422 signals [signum - 1].pending = 1;
2423 evpipe_write (EV_A_ &sig_pending);
2427 ev_sighandler (int signum)
2430 signal (signum, ev_sighandler);
2433 ev_feed_signal (signum);
2437 ev_feed_signal_event (EV_P_ int signum) EV_THROW
2441 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2447 /* it is permissible to try to feed a signal to the wrong loop */
2448 /* or, likely more useful, feeding a signal nobody is waiting for */
2450 if (expect_false (signals [signum].loop != EV_A))
2454 signals [signum].pending = 0;
2455 ECB_MEMORY_FENCE_RELEASE;
2457 for (w = signals [signum].head; w; w = w->next)
2458 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2463 sigfdcb (EV_P_ ev_io *iow, int revents)
2465 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2469 ssize_t res = read (sigfd, si, sizeof (si));
2471 /* not ISO-C, as res might be -1, but works with SuS */
2472 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2473 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2475 if (res < (ssize_t)sizeof (si))
2483 /*****************************************************************************/
2486 static WL childs [EV_PID_HASHSIZE];
2488 static ev_signal childev;
2490 #ifndef WIFCONTINUED
2491 # define WIFCONTINUED(status) 0
2494 /* handle a single child status event */
2496 child_reap (EV_P_ int chain, int pid, int status)
2499 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
2501 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2503 if ((w->pid == pid || !w->pid)
2504 && (!traced || (w->flags & 1)))
2506 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
2508 w->rstatus = status;
2509 ev_feed_event (EV_A_ (W)w, EV_CHILD);
2515 # define WCONTINUED 0
2518 /* called on sigchld etc., calls waitpid */
2520 childcb (EV_P_ ev_signal *sw, int revents)
2524 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
2525 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
2528 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
2531 /* make sure we are called again until all children have been reaped */
2532 /* we need to do it this way so that the callback gets called before we continue */
2533 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
2535 child_reap (EV_A_ pid, pid, status);
2536 if ((EV_PID_HASHSIZE) > 1)
2537 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
2542 /*****************************************************************************/
2545 # include "ev_iocp.c"
2548 # include "ev_port.c"
2551 # include "ev_kqueue.c"
2554 # include "ev_epoll.c"
2557 # include "ev_poll.c"
2560 # include "ev_select.c"
2564 ev_version_major (void) EV_THROW
2566 return EV_VERSION_MAJOR;
2570 ev_version_minor (void) EV_THROW
2572 return EV_VERSION_MINOR;
2575 /* return true if we are running with elevated privileges and should ignore env variables */
2576 int inline_size ecb_cold
2577 enable_secure (void)
2582 return getuid () != geteuid ()
2583 || getgid () != getegid ();
2587 unsigned int ecb_cold
2588 ev_supported_backends (void) EV_THROW
2590 unsigned int flags = 0;
2592 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2593 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
2594 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2595 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2596 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2601 unsigned int ecb_cold
2602 ev_recommended_backends (void) EV_THROW
2604 unsigned int flags = ev_supported_backends ();
2607 /* kqueue is borked on everything but netbsd apparently */
2608 /* it usually doesn't work correctly on anything but sockets and pipes */
2609 flags &= ~EVBACKEND_KQUEUE;
2612 /* only select works correctly on that "unix-certified" platform */
2613 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2614 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2617 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2623 unsigned int ecb_cold
2624 ev_embeddable_backends (void) EV_THROW
2626 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2628 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2629 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2630 flags &= ~EVBACKEND_EPOLL;
2636 ev_backend (EV_P) EV_THROW
2643 ev_iteration (EV_P) EV_THROW
2649 ev_depth (EV_P) EV_THROW
2655 ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2657 io_blocktime = interval;
2661 ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2663 timeout_blocktime = interval;
2667 ev_set_userdata (EV_P_ void *data) EV_THROW
2673 ev_userdata (EV_P) EV_THROW
2679 ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
2681 invoke_cb = invoke_pending_cb;
2685 ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2687 release_cb = release;
2688 acquire_cb = acquire;
2692 /* initialise a loop structure, must be zero-initialised */
2693 static void noinline ecb_cold
2694 loop_init (EV_P_ unsigned int flags) EV_THROW
2705 if (!clock_gettime (CLOCK_REALTIME, &ts))
2710 #if EV_USE_MONOTONIC
2711 if (!have_monotonic)
2715 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
2720 /* pid check not overridable via env */
2722 if (flags & EVFLAG_FORKCHECK)
2726 if (!(flags & EVFLAG_NOENV)
2727 && !enable_secure ()
2728 && getenv ("LIBEV_FLAGS"))
2729 flags = atoi (getenv ("LIBEV_FLAGS"));
2731 ev_rt_now = ev_time ();
2732 mn_now = get_clock ();
2734 rtmn_diff = ev_rt_now - mn_now;
2736 invoke_cb = ev_invoke_pending;
2740 timeout_blocktime = 0.;
2747 pipe_write_skipped = 0;
2748 pipe_write_wanted = 0;
2752 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2755 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2758 if (!(flags & EVBACKEND_MASK))
2759 flags |= ev_recommended_backends ();
2762 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2765 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
2768 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
2771 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
2774 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
2777 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
2780 ev_prepare_init (&pending_w, pendingcb);
2782 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2783 ev_init (&pipe_w, pipecb);
2784 ev_set_priority (&pipe_w, EV_MAXPRI);
2789 /* free up a loop structure */
2791 ev_loop_destroy (EV_P)
2796 /* mimic free (0) */
2801 #if EV_CLEANUP_ENABLE
2802 /* queue cleanup watchers (and execute them) */
2803 if (expect_false (cleanupcnt))
2805 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2811 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2813 ev_ref (EV_A); /* child watcher */
2814 ev_signal_stop (EV_A_ &childev);
2818 if (ev_is_active (&pipe_w))
2821 /*ev_io_stop (EV_A_ &pipe_w);*/
2823 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2824 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2828 if (ev_is_active (&sigfd_w))
2837 if (backend_fd >= 0)
2841 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2844 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
2847 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
2850 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
2853 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
2856 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
2859 for (i = NUMPRI; i--; )
2861 array_free (pending, [i]);
2863 array_free (idle, [i]);
2867 ev_free (anfds); anfds = 0; anfdmax = 0;
2869 /* have to use the microsoft-never-gets-it-right macro */
2870 array_free (rfeed, EMPTY);
2871 array_free (fdchange, EMPTY);
2872 array_free (timer, EMPTY);
2873 #if EV_PERIODIC_ENABLE
2874 array_free (periodic, EMPTY);
2877 array_free (fork, EMPTY);
2879 #if EV_CLEANUP_ENABLE
2880 array_free (cleanup, EMPTY);
2882 array_free (prepare, EMPTY);
2883 array_free (check, EMPTY);
2885 array_free (async, EMPTY);
2891 if (ev_is_default_loop (EV_A))
2893 ev_default_loop_ptr = 0;
2901 inline_size void infy_fork (EV_P);
2908 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
2911 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
2914 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
2920 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2921 if (ev_is_active (&pipe_w))
2923 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2926 ev_io_stop (EV_A_ &pipe_w);
2928 if (evpipe [0] >= 0)
2929 EV_WIN32_CLOSE_FD (evpipe [0]);
2932 /* iterate over everything, in case we missed something before */
2933 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2942 struct ev_loop * ecb_cold
2943 ev_loop_new (unsigned int flags) EV_THROW
2945 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2947 memset (EV_A, 0, sizeof (struct ev_loop));
2948 loop_init (EV_A_ flags);
2950 if (ev_backend (EV_A))
2957 #endif /* multiplicity */
2960 static void noinline ecb_cold
2961 verify_watcher (EV_P_ W w)
2963 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2966 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2969 static void noinline ecb_cold
2970 verify_heap (EV_P_ ANHE *heap, int N)
2974 for (i = HEAP0; i < N + HEAP0; ++i)
2976 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2977 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2978 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2980 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2984 static void noinline ecb_cold
2985 array_verify (EV_P_ W *ws, int cnt)
2989 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2990 verify_watcher (EV_A_ ws [cnt]);
2997 ev_verify (EV_P) EV_THROW
3003 assert (activecnt >= -1);
3005 assert (fdchangemax >= fdchangecnt);
3006 for (i = 0; i < fdchangecnt; ++i)
3007 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
3009 assert (anfdmax >= 0);
3010 for (i = 0; i < anfdmax; ++i)
3014 for (w = w2 = anfds [i].head; w; w = w->next)
3016 verify_watcher (EV_A_ (W)w);
3020 assert (("libev: io watcher list contains a loop", w != w2));
3024 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
3025 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
3029 assert (timermax >= timercnt);
3030 verify_heap (EV_A_ timers, timercnt);
3032 #if EV_PERIODIC_ENABLE
3033 assert (periodicmax >= periodiccnt);
3034 verify_heap (EV_A_ periodics, periodiccnt);
3037 for (i = NUMPRI; i--; )
3039 assert (pendingmax [i] >= pendingcnt [i]);
3041 assert (idleall >= 0);
3042 assert (idlemax [i] >= idlecnt [i]);
3043 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
3048 assert (forkmax >= forkcnt);
3049 array_verify (EV_A_ (W *)forks, forkcnt);
3052 #if EV_CLEANUP_ENABLE
3053 assert (cleanupmax >= cleanupcnt);
3054 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3058 assert (asyncmax >= asynccnt);
3059 array_verify (EV_A_ (W *)asyncs, asynccnt);
3062 #if EV_PREPARE_ENABLE
3063 assert (preparemax >= preparecnt);
3064 array_verify (EV_A_ (W *)prepares, preparecnt);
3068 assert (checkmax >= checkcnt);
3069 array_verify (EV_A_ (W *)checks, checkcnt);
3074 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
3075 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3083 struct ev_loop * ecb_cold
3087 ev_default_loop (unsigned int flags) EV_THROW
3089 if (!ev_default_loop_ptr)
3092 EV_P = ev_default_loop_ptr = &default_loop_struct;
3094 ev_default_loop_ptr = 1;
3097 loop_init (EV_A_ flags);
3099 if (ev_backend (EV_A))
3102 ev_signal_init (&childev, childcb, SIGCHLD);
3103 ev_set_priority (&childev, EV_MAXPRI);
3104 ev_signal_start (EV_A_ &childev);
3105 ev_unref (EV_A); /* child watcher should not keep loop alive */
3109 ev_default_loop_ptr = 0;
3112 return ev_default_loop_ptr;
3116 ev_loop_fork (EV_P) EV_THROW
3121 /*****************************************************************************/
3124 ev_invoke (EV_P_ void *w, int revents)
3126 EV_CB_INVOKE ((W)w, revents);
3130 ev_pending_count (EV_P) EV_THROW
3133 unsigned int count = 0;
3135 for (pri = NUMPRI; pri--; )
3136 count += pendingcnt [pri];
3142 ev_invoke_pending (EV_P)
3144 pendingpri = NUMPRI;
3146 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3150 while (pendingcnt [pendingpri])
3152 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
3155 EV_CB_INVOKE (p->w, p->events);
3162 /* make idle watchers pending. this handles the "call-idle */
3163 /* only when higher priorities are idle" logic */
3167 if (expect_false (idleall))
3171 for (pri = NUMPRI; pri--; )
3173 if (pendingcnt [pri])
3178 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
3186 /* make timers pending */
3192 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
3196 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
3198 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
3200 /* first reschedule or stop timer */
3203 ev_at (w) += w->repeat;
3204 if (ev_at (w) < mn_now)
3207 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
3209 ANHE_at_cache (timers [HEAP0]);
3210 downheap (timers, timercnt, HEAP0);
3213 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
3216 feed_reverse (EV_A_ (W)w);
3218 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
3220 feed_reverse_done (EV_A_ EV_TIMER);
3224 #if EV_PERIODIC_ENABLE
3226 static void noinline
3227 periodic_recalc (EV_P_ ev_periodic *w)
3229 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3230 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3232 /* the above almost always errs on the low side */
3233 while (at <= ev_rt_now)
3235 ev_tstamp nat = at + w->interval;
3237 /* when resolution fails us, we use ev_rt_now */
3238 if (expect_false (nat == at))
3250 /* make periodics pending */
3252 periodics_reify (EV_P)
3256 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
3260 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
3262 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
3264 /* first reschedule or stop timer */
3265 if (w->reschedule_cb)
3267 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3269 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
3271 ANHE_at_cache (periodics [HEAP0]);
3272 downheap (periodics, periodiccnt, HEAP0);
3274 else if (w->interval)
3276 periodic_recalc (EV_A_ w);
3277 ANHE_at_cache (periodics [HEAP0]);
3278 downheap (periodics, periodiccnt, HEAP0);
3281 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
3284 feed_reverse (EV_A_ (W)w);
3286 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
3288 feed_reverse_done (EV_A_ EV_PERIODIC);
3292 /* simply recalculate all periodics */
3293 /* TODO: maybe ensure that at least one event happens when jumping forward? */
3294 static void noinline ecb_cold
3295 periodics_reschedule (EV_P)
3299 /* adjust periodics after time jump */
3300 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
3302 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
3304 if (w->reschedule_cb)
3305 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3306 else if (w->interval)
3307 periodic_recalc (EV_A_ w);
3309 ANHE_at_cache (periodics [i]);
3312 reheap (periodics, periodiccnt);
3316 /* adjust all timers by a given offset */
3317 static void noinline ecb_cold
3318 timers_reschedule (EV_P_ ev_tstamp adjust)
3322 for (i = 0; i < timercnt; ++i)
3324 ANHE *he = timers + i + HEAP0;
3325 ANHE_w (*he)->at += adjust;
3326 ANHE_at_cache (*he);
3330 /* fetch new monotonic and realtime times from the kernel */
3331 /* also detect if there was a timejump, and act accordingly */
3333 time_update (EV_P_ ev_tstamp max_block)
3335 #if EV_USE_MONOTONIC
3336 if (expect_true (have_monotonic))
3339 ev_tstamp odiff = rtmn_diff;
3341 mn_now = get_clock ();
3343 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
3344 /* interpolate in the meantime */
3345 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
3347 ev_rt_now = rtmn_diff + mn_now;
3352 ev_rt_now = ev_time ();
3354 /* loop a few times, before making important decisions.
3355 * on the choice of "4": one iteration isn't enough,
3356 * in case we get preempted during the calls to
3357 * ev_time and get_clock. a second call is almost guaranteed
3358 * to succeed in that case, though. and looping a few more times
3359 * doesn't hurt either as we only do this on time-jumps or
3360 * in the unlikely event of having been preempted here.
3365 rtmn_diff = ev_rt_now - mn_now;
3367 diff = odiff - rtmn_diff;
3369 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
3370 return; /* all is well */
3372 ev_rt_now = ev_time ();
3373 mn_now = get_clock ();
3377 /* no timer adjustment, as the monotonic clock doesn't jump */
3378 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
3379 # if EV_PERIODIC_ENABLE
3380 periodics_reschedule (EV_A);
3386 ev_rt_now = ev_time ();
3388 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
3390 /* adjust timers. this is easy, as the offset is the same for all of them */
3391 timers_reschedule (EV_A_ ev_rt_now - mn_now);
3392 #if EV_PERIODIC_ENABLE
3393 periodics_reschedule (EV_A);
3402 ev_run (EV_P_ int flags)
3408 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3410 loop_done = EVBREAK_CANCEL;
3412 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
3421 if (expect_false (curpid)) /* penalise the forking check even more */
3422 if (expect_false (getpid () != curpid))
3430 /* we might have forked, so queue fork handlers */
3431 if (expect_false (postfork))
3434 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
3439 #if EV_PREPARE_ENABLE
3440 /* queue prepare watchers (and execute them) */
3441 if (expect_false (preparecnt))
3443 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
3448 if (expect_false (loop_done))
3451 /* we might have forked, so reify kernel state if necessary */
3452 if (expect_false (postfork))
3455 /* update fd-related kernel structures */
3458 /* calculate blocking time */
3460 ev_tstamp waittime = 0.;
3461 ev_tstamp sleeptime = 0.;
3463 /* remember old timestamp for io_blocktime calculation */
3464 ev_tstamp prev_mn_now = mn_now;
3466 /* update time to cancel out callback processing overhead */
3467 time_update (EV_A_ 1e100);
3469 /* from now on, we want a pipe-wake-up */
3470 pipe_write_wanted = 1;
3472 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3474 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
3476 waittime = MAX_BLOCKTIME;
3480 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
3481 if (waittime > to) waittime = to;
3484 #if EV_PERIODIC_ENABLE
3487 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
3488 if (waittime > to) waittime = to;
3492 /* don't let timeouts decrease the waittime below timeout_blocktime */
3493 if (expect_false (waittime < timeout_blocktime))
3494 waittime = timeout_blocktime;
3496 /* at this point, we NEED to wait, so we have to ensure */
3497 /* to pass a minimum nonzero value to the backend */
3498 if (expect_false (waittime < backend_mintime))
3499 waittime = backend_mintime;
3501 /* extra check because io_blocktime is commonly 0 */
3502 if (expect_false (io_blocktime))
3504 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3506 if (sleeptime > waittime - backend_mintime)
3507 sleeptime = waittime - backend_mintime;
3509 if (expect_true (sleeptime > 0.))
3511 ev_sleep (sleeptime);
3512 waittime -= sleeptime;
3520 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
3521 backend_poll (EV_A_ waittime);
3522 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3524 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3526 ECB_MEMORY_FENCE_ACQUIRE;
3527 if (pipe_write_skipped)
3529 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3530 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3534 /* update ev_rt_now, do magic */
3535 time_update (EV_A_ waittime + sleeptime);
3538 /* queue pending timers and reschedule them */
3539 timers_reify (EV_A); /* relative timers called last */
3540 #if EV_PERIODIC_ENABLE
3541 periodics_reify (EV_A); /* absolute timers called first */
3545 /* queue idle watchers unless other events are pending */
3550 /* queue check watchers, to be executed first */
3551 if (expect_false (checkcnt))
3552 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3557 while (expect_true (
3560 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3563 if (loop_done == EVBREAK_ONE)
3564 loop_done = EVBREAK_CANCEL;
3574 ev_break (EV_P_ int how) EV_THROW
3580 ev_ref (EV_P) EV_THROW
3586 ev_unref (EV_P) EV_THROW
3592 ev_now_update (EV_P) EV_THROW
3594 time_update (EV_A_ 1e100);
3598 ev_suspend (EV_P) EV_THROW
3600 ev_now_update (EV_A);
3604 ev_resume (EV_P) EV_THROW
3606 ev_tstamp mn_prev = mn_now;
3608 ev_now_update (EV_A);
3609 timers_reschedule (EV_A_ mn_now - mn_prev);
3610 #if EV_PERIODIC_ENABLE
3611 /* TODO: really do this? */
3612 periodics_reschedule (EV_A);
3616 /*****************************************************************************/
3617 /* singly-linked list management, used when the expected list length is short */
3620 wlist_add (WL *head, WL elem)
3627 wlist_del (WL *head, WL elem)
3631 if (expect_true (*head == elem))
3637 head = &(*head)->next;
3641 /* internal, faster, version of ev_clear_pending */
3643 clear_pending (EV_P_ W w)
3647 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
3653 ev_clear_pending (EV_P_ void *w) EV_THROW
3656 int pending = w_->pending;
3658 if (expect_true (pending))
3660 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3661 p->w = (W)&pending_w;
3670 pri_adjust (EV_P_ W w)
3672 int pri = ev_priority (w);
3673 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3674 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3675 ev_set_priority (w, pri);
3679 ev_start (EV_P_ W w, int active)
3681 pri_adjust (EV_A_ w);
3693 /*****************************************************************************/
3696 ev_io_start (EV_P_ ev_io *w) EV_THROW
3700 if (expect_false (ev_is_active (w)))
3703 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3704 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3708 ev_start (EV_A_ (W)w, 1);
3709 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
3710 wlist_add (&anfds[fd].head, (WL)w);
3712 /* common bug, apparently */
3713 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3715 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3716 w->events &= ~EV__IOFDSET;
3722 ev_io_stop (EV_P_ ev_io *w) EV_THROW
3724 clear_pending (EV_A_ (W)w);
3725 if (expect_false (!ev_is_active (w)))
3728 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3732 wlist_del (&anfds[w->fd].head, (WL)w);
3733 ev_stop (EV_A_ (W)w);
3735 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3741 ev_timer_start (EV_P_ ev_timer *w) EV_THROW
3743 if (expect_false (ev_is_active (w)))
3746 ev_at (w) += mn_now;
3748 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
3753 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
3754 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
3755 ANHE_w (timers [ev_active (w)]) = (WT)w;
3756 ANHE_at_cache (timers [ev_active (w)]);
3757 upheap (timers, ev_active (w));
3761 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
3765 ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
3767 clear_pending (EV_A_ (W)w);
3768 if (expect_false (!ev_is_active (w)))
3774 int active = ev_active (w);
3776 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3780 if (expect_true (active < timercnt + HEAP0))
3782 timers [active] = timers [timercnt + HEAP0];
3783 adjustheap (timers, timercnt, active);
3787 ev_at (w) -= mn_now;
3789 ev_stop (EV_A_ (W)w);
3795 ev_timer_again (EV_P_ ev_timer *w) EV_THROW
3799 clear_pending (EV_A_ (W)w);
3801 if (ev_is_active (w))
3805 ev_at (w) = mn_now + w->repeat;
3806 ANHE_at_cache (timers [ev_active (w)]);
3807 adjustheap (timers, timercnt, ev_active (w));
3810 ev_timer_stop (EV_A_ w);
3814 ev_at (w) = w->repeat;
3815 ev_timer_start (EV_A_ w);
3822 ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3824 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3827 #if EV_PERIODIC_ENABLE
3829 ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
3831 if (expect_false (ev_is_active (w)))
3834 if (w->reschedule_cb)
3835 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3836 else if (w->interval)
3838 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
3839 periodic_recalc (EV_A_ w);
3842 ev_at (w) = w->offset;
3847 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
3848 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
3849 ANHE_w (periodics [ev_active (w)]) = (WT)w;
3850 ANHE_at_cache (periodics [ev_active (w)]);
3851 upheap (periodics, ev_active (w));
3855 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
3859 ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
3861 clear_pending (EV_A_ (W)w);
3862 if (expect_false (!ev_is_active (w)))
3868 int active = ev_active (w);
3870 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3874 if (expect_true (active < periodiccnt + HEAP0))
3876 periodics [active] = periodics [periodiccnt + HEAP0];
3877 adjustheap (periodics, periodiccnt, active);
3881 ev_stop (EV_A_ (W)w);
3887 ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
3889 /* TODO: use adjustheap and recalculation */
3890 ev_periodic_stop (EV_A_ w);
3891 ev_periodic_start (EV_A_ w);
3896 # define SA_RESTART 0
3899 #if EV_SIGNAL_ENABLE
3902 ev_signal_start (EV_P_ ev_signal *w) EV_THROW
3904 if (expect_false (ev_is_active (w)))
3907 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3910 assert (("libev: a signal must not be attached to two different loops",
3911 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3913 signals [w->signum - 1].loop = EV_A;
3914 ECB_MEMORY_FENCE_RELEASE;
3922 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3923 if (sigfd < 0 && errno == EINVAL)
3924 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3928 fd_intern (sigfd); /* doing it twice will not hurt */
3930 sigemptyset (&sigfd_set);
3932 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3933 ev_set_priority (&sigfd_w, EV_MAXPRI);
3934 ev_io_start (EV_A_ &sigfd_w);
3935 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3941 /* TODO: check .head */
3942 sigaddset (&sigfd_set, w->signum);
3943 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3945 signalfd (sigfd, &sigfd_set, 0);
3949 ev_start (EV_A_ (W)w, 1);
3950 wlist_add (&signals [w->signum - 1].head, (WL)w);
3953 # if EV_USE_SIGNALFD
3954 if (sigfd < 0) /*TODO*/
3960 signal (w->signum, ev_sighandler);
3962 struct sigaction sa;
3966 sa.sa_handler = ev_sighandler;
3967 sigfillset (&sa.sa_mask);
3968 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3969 sigaction (w->signum, &sa, 0);
3971 if (origflags & EVFLAG_NOSIGMASK)
3973 sigemptyset (&sa.sa_mask);
3974 sigaddset (&sa.sa_mask, w->signum);
3975 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3984 ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
3986 clear_pending (EV_A_ (W)w);
3987 if (expect_false (!ev_is_active (w)))
3992 wlist_del (&signals [w->signum - 1].head, (WL)w);
3993 ev_stop (EV_A_ (W)w);
3995 if (!signals [w->signum - 1].head)
3998 signals [w->signum - 1].loop = 0; /* unattach from signal */
4006 sigaddset (&ss, w->signum);
4007 sigdelset (&sigfd_set, w->signum);
4009 signalfd (sigfd, &sigfd_set, 0);
4010 sigprocmask (SIG_UNBLOCK, &ss, 0);
4014 signal (w->signum, SIG_DFL);
4025 ev_child_start (EV_P_ ev_child *w) EV_THROW
4028 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
4030 if (expect_false (ev_is_active (w)))
4035 ev_start (EV_A_ (W)w, 1);
4036 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
4042 ev_child_stop (EV_P_ ev_child *w) EV_THROW
4044 clear_pending (EV_A_ (W)w);
4045 if (expect_false (!ev_is_active (w)))
4050 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
4051 ev_stop (EV_A_ (W)w);
4062 # define lstat(a,b) _stati64 (a,b)
4065 #define DEF_STAT_INTERVAL 5.0074891
4066 #define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
4067 #define MIN_STAT_INTERVAL 0.1074891
4069 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
4073 /* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
4074 # define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
4076 static void noinline
4077 infy_add (EV_P_ ev_stat *w)
4079 w->wd = inotify_add_watch (fs_fd, w->path,
4080 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4081 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4082 | IN_DONT_FOLLOW | IN_MASK_ADD);
4088 /* now local changes will be tracked by inotify, but remote changes won't */
4089 /* unless the filesystem is known to be local, we therefore still poll */
4090 /* also do poll on <2.6.25, but with normal frequency */
4093 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4094 else if (!statfs (w->path, &sfs)
4095 && (sfs.f_type == 0x1373 /* devfs */
4096 || sfs.f_type == 0x4006 /* fat */
4097 || sfs.f_type == 0x4d44 /* msdos */
4098 || sfs.f_type == 0xEF53 /* ext2/3 */
4099 || sfs.f_type == 0x72b6 /* jffs2 */
4100 || sfs.f_type == 0x858458f6 /* ramfs */
4101 || sfs.f_type == 0x5346544e /* ntfs */
4102 || sfs.f_type == 0x3153464a /* jfs */
4103 || sfs.f_type == 0x9123683e /* btrfs */
4104 || sfs.f_type == 0x52654973 /* reiser3 */
4105 || sfs.f_type == 0x01021994 /* tmpfs */
4106 || sfs.f_type == 0x58465342 /* xfs */))
4107 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4109 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
4113 /* can't use inotify, continue to stat */
4114 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4116 /* if path is not there, monitor some parent directory for speedup hints */
4117 /* note that exceeding the hardcoded path limit is not a correctness issue, */
4118 /* but an efficiency issue only */
4119 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
4122 strcpy (path, w->path);
4126 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
4127 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
4129 char *pend = strrchr (path, '/');
4131 if (!pend || pend == path)
4135 w->wd = inotify_add_watch (fs_fd, path, mask);
4137 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
4142 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4144 /* now re-arm timer, if required */
4145 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4146 ev_timer_again (EV_A_ &w->timer);
4147 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4150 static void noinline
4151 infy_del (EV_P_ ev_stat *w)
4160 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
4161 wlist_del (&fs_hash [slot].head, (WL)w);
4163 /* remove this watcher, if others are watching it, they will rearm */
4164 inotify_rm_watch (fs_fd, wd);
4167 static void noinline
4168 infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
4171 /* overflow, need to check for all hash slots */
4172 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
4173 infy_wd (EV_A_ slot, wd, ev);
4178 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
4180 ev_stat *w = (ev_stat *)w_;
4181 w_ = w_->next; /* lets us remove this watcher and all before it */
4183 if (w->wd == wd || wd == -1)
4185 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
4187 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4189 infy_add (EV_A_ w); /* re-add, no matter what */
4192 stat_timer_cb (EV_A_ &w->timer, 0);
4199 infy_cb (EV_P_ ev_io *w, int revents)
4201 char buf [EV_INOTIFY_BUFSIZE];
4203 int len = read (fs_fd, buf, sizeof (buf));
4205 for (ofs = 0; ofs < len; )
4207 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
4208 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4209 ofs += sizeof (struct inotify_event) + ev->len;
4213 inline_size void ecb_cold
4214 ev_check_2625 (EV_P)
4216 /* kernels < 2.6.25 are borked
4217 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4219 if (ev_linux_version () < 0x020619)
4228 #if defined IN_CLOEXEC && defined IN_NONBLOCK
4229 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4233 return inotify_init ();
4244 ev_check_2625 (EV_A);
4246 fs_fd = infy_newfd ();
4251 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
4252 ev_set_priority (&fs_w, EV_MAXPRI);
4253 ev_io_start (EV_A_ &fs_w);
4267 ev_io_stop (EV_A_ &fs_w);
4269 fs_fd = infy_newfd ();
4274 ev_io_set (&fs_w, fs_fd, EV_READ);
4275 ev_io_start (EV_A_ &fs_w);
4279 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
4281 WL w_ = fs_hash [slot].head;
4282 fs_hash [slot].head = 0;
4286 ev_stat *w = (ev_stat *)w_;
4287 w_ = w_->next; /* lets us add this watcher */
4292 infy_add (EV_A_ w); /* re-add, no matter what */
4295 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4296 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4297 ev_timer_again (EV_A_ &w->timer);
4298 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4307 # define EV_LSTAT(p,b) _stati64 (p, b)
4309 # define EV_LSTAT(p,b) lstat (p, b)
4313 ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
4315 if (lstat (w->path, &w->attr) < 0)
4316 w->attr.st_nlink = 0;
4317 else if (!w->attr.st_nlink)
4318 w->attr.st_nlink = 1;
4321 static void noinline
4322 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
4324 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
4326 ev_statdata prev = w->attr;
4327 ev_stat_stat (EV_A_ w);
4329 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
4331 prev.st_dev != w->attr.st_dev
4332 || prev.st_ino != w->attr.st_ino
4333 || prev.st_mode != w->attr.st_mode
4334 || prev.st_nlink != w->attr.st_nlink
4335 || prev.st_uid != w->attr.st_uid
4336 || prev.st_gid != w->attr.st_gid
4337 || prev.st_rdev != w->attr.st_rdev
4338 || prev.st_size != w->attr.st_size
4339 || prev.st_atime != w->attr.st_atime
4340 || prev.st_mtime != w->attr.st_mtime
4341 || prev.st_ctime != w->attr.st_ctime
4343 /* we only update w->prev on actual differences */
4344 /* in case we test more often than invoke the callback, */
4345 /* to ensure that prev is always different to attr */
4353 ev_stat_stat (EV_A_ w); /* avoid race... */
4357 ev_feed_event (EV_A_ w, EV_STAT);
4362 ev_stat_start (EV_P_ ev_stat *w) EV_THROW
4364 if (expect_false (ev_is_active (w)))
4367 ev_stat_stat (EV_A_ w);
4369 if (w->interval < MIN_STAT_INTERVAL && w->interval)
4370 w->interval = MIN_STAT_INTERVAL;
4372 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
4373 ev_set_priority (&w->timer, ev_priority (w));
4383 ev_timer_again (EV_A_ &w->timer);
4387 ev_start (EV_A_ (W)w, 1);
4393 ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
4395 clear_pending (EV_A_ (W)w);
4396 if (expect_false (!ev_is_active (w)))
4405 if (ev_is_active (&w->timer))
4408 ev_timer_stop (EV_A_ &w->timer);
4411 ev_stop (EV_A_ (W)w);
4419 ev_idle_start (EV_P_ ev_idle *w) EV_THROW
4421 if (expect_false (ev_is_active (w)))
4424 pri_adjust (EV_A_ (W)w);
4429 int active = ++idlecnt [ABSPRI (w)];
4432 ev_start (EV_A_ (W)w, active);
4434 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
4435 idles [ABSPRI (w)][active - 1] = w;
4442 ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
4444 clear_pending (EV_A_ (W)w);
4445 if (expect_false (!ev_is_active (w)))
4451 int active = ev_active (w);
4453 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
4454 ev_active (idles [ABSPRI (w)][active - 1]) = active;
4456 ev_stop (EV_A_ (W)w);
4464 #if EV_PREPARE_ENABLE
4466 ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
4468 if (expect_false (ev_is_active (w)))
4473 ev_start (EV_A_ (W)w, ++preparecnt);
4474 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
4475 prepares [preparecnt - 1] = w;
4481 ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
4483 clear_pending (EV_A_ (W)w);
4484 if (expect_false (!ev_is_active (w)))
4490 int active = ev_active (w);
4492 prepares [active - 1] = prepares [--preparecnt];
4493 ev_active (prepares [active - 1]) = active;
4496 ev_stop (EV_A_ (W)w);
4504 ev_check_start (EV_P_ ev_check *w) EV_THROW
4506 if (expect_false (ev_is_active (w)))
4511 ev_start (EV_A_ (W)w, ++checkcnt);
4512 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
4513 checks [checkcnt - 1] = w;
4519 ev_check_stop (EV_P_ ev_check *w) EV_THROW
4521 clear_pending (EV_A_ (W)w);
4522 if (expect_false (!ev_is_active (w)))
4528 int active = ev_active (w);
4530 checks [active - 1] = checks [--checkcnt];
4531 ev_active (checks [active - 1]) = active;
4534 ev_stop (EV_A_ (W)w);
4542 ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
4544 ev_run (w->other, EVRUN_NOWAIT);
4548 embed_io_cb (EV_P_ ev_io *io, int revents)
4550 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
4553 ev_feed_event (EV_A_ (W)w, EV_EMBED);
4555 ev_run (w->other, EVRUN_NOWAIT);
4559 embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4561 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4569 ev_run (EV_A_ EVRUN_NOWAIT);
4575 embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4577 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4579 ev_embed_stop (EV_A_ w);
4584 ev_loop_fork (EV_A);
4585 ev_run (EV_A_ EVRUN_NOWAIT);
4588 ev_embed_start (EV_A_ w);
4593 embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4595 ev_idle_stop (EV_A_ idle);
4600 ev_embed_start (EV_P_ ev_embed *w) EV_THROW
4602 if (expect_false (ev_is_active (w)))
4607 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4608 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4613 ev_set_priority (&w->io, ev_priority (w));
4614 ev_io_start (EV_A_ &w->io);
4616 ev_prepare_init (&w->prepare, embed_prepare_cb);
4617 ev_set_priority (&w->prepare, EV_MINPRI);
4618 ev_prepare_start (EV_A_ &w->prepare);
4620 ev_fork_init (&w->fork, embed_fork_cb);
4621 ev_fork_start (EV_A_ &w->fork);
4623 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4625 ev_start (EV_A_ (W)w, 1);
4631 ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
4633 clear_pending (EV_A_ (W)w);
4634 if (expect_false (!ev_is_active (w)))
4639 ev_io_stop (EV_A_ &w->io);
4640 ev_prepare_stop (EV_A_ &w->prepare);
4641 ev_fork_stop (EV_A_ &w->fork);
4643 ev_stop (EV_A_ (W)w);
4651 ev_fork_start (EV_P_ ev_fork *w) EV_THROW
4653 if (expect_false (ev_is_active (w)))
4658 ev_start (EV_A_ (W)w, ++forkcnt);
4659 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4660 forks [forkcnt - 1] = w;
4666 ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
4668 clear_pending (EV_A_ (W)w);
4669 if (expect_false (!ev_is_active (w)))
4675 int active = ev_active (w);
4677 forks [active - 1] = forks [--forkcnt];
4678 ev_active (forks [active - 1]) = active;
4681 ev_stop (EV_A_ (W)w);
4687 #if EV_CLEANUP_ENABLE
4689 ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4691 if (expect_false (ev_is_active (w)))
4696 ev_start (EV_A_ (W)w, ++cleanupcnt);
4697 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4698 cleanups [cleanupcnt - 1] = w;
4700 /* cleanup watchers should never keep a refcount on the loop */
4706 ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4708 clear_pending (EV_A_ (W)w);
4709 if (expect_false (!ev_is_active (w)))
4716 int active = ev_active (w);
4718 cleanups [active - 1] = cleanups [--cleanupcnt];
4719 ev_active (cleanups [active - 1]) = active;
4722 ev_stop (EV_A_ (W)w);
4730 ev_async_start (EV_P_ ev_async *w) EV_THROW
4732 if (expect_false (ev_is_active (w)))
4741 ev_start (EV_A_ (W)w, ++asynccnt);
4742 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4743 asyncs [asynccnt - 1] = w;
4749 ev_async_stop (EV_P_ ev_async *w) EV_THROW
4751 clear_pending (EV_A_ (W)w);
4752 if (expect_false (!ev_is_active (w)))
4758 int active = ev_active (w);
4760 asyncs [active - 1] = asyncs [--asynccnt];
4761 ev_active (asyncs [active - 1]) = active;
4764 ev_stop (EV_A_ (W)w);
4770 ev_async_send (EV_P_ ev_async *w) EV_THROW
4773 evpipe_write (EV_A_ &async_pending);
4777 /*****************************************************************************/
4783 void (*cb)(int revents, void *arg);
4788 once_cb (EV_P_ struct ev_once *once, int revents)
4790 void (*cb)(int revents, void *arg) = once->cb;
4791 void *arg = once->arg;
4793 ev_io_stop (EV_A_ &once->io);
4794 ev_timer_stop (EV_A_ &once->to);
4801 once_cb_io (EV_P_ ev_io *w, int revents)
4803 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4805 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
4809 once_cb_to (EV_P_ ev_timer *w, int revents)
4811 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4813 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
4817 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
4819 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
4821 if (expect_false (!once))
4823 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
4830 ev_init (&once->io, once_cb_io);
4833 ev_io_set (&once->io, fd, events);
4834 ev_io_start (EV_A_ &once->io);
4837 ev_init (&once->to, once_cb_to);
4840 ev_timer_set (&once->to, timeout, 0.);
4841 ev_timer_start (EV_A_ &once->to);
4845 /*****************************************************************************/
4849 ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4852 ev_watcher_list *wl, *wn;
4854 if (types & (EV_IO | EV_EMBED))
4855 for (i = 0; i < anfdmax; ++i)
4856 for (wl = anfds [i].head; wl; )
4861 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4863 if (types & EV_EMBED)
4864 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4869 if (ev_cb ((ev_io *)wl) == infy_cb)
4873 if ((ev_io *)wl != &pipe_w)
4875 cb (EV_A_ EV_IO, wl);
4880 if (types & (EV_TIMER | EV_STAT))
4881 for (i = timercnt + HEAP0; i-- > HEAP0; )
4883 /*TODO: timer is not always active*/
4884 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4886 if (types & EV_STAT)
4887 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4891 if (types & EV_TIMER)
4892 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4894 #if EV_PERIODIC_ENABLE
4895 if (types & EV_PERIODIC)
4896 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4897 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4901 if (types & EV_IDLE)
4902 for (j = NUMPRI; j--; )
4903 for (i = idlecnt [j]; i--; )
4904 cb (EV_A_ EV_IDLE, idles [j][i]);
4908 if (types & EV_FORK)
4909 for (i = forkcnt; i--; )
4910 if (ev_cb (forks [i]) != embed_fork_cb)
4911 cb (EV_A_ EV_FORK, forks [i]);
4915 if (types & EV_ASYNC)
4916 for (i = asynccnt; i--; )
4917 cb (EV_A_ EV_ASYNC, asyncs [i]);
4920 #if EV_PREPARE_ENABLE
4921 if (types & EV_PREPARE)
4922 for (i = preparecnt; i--; )
4923 # if EV_EMBED_ENABLE
4924 if (ev_cb (prepares [i]) != embed_prepare_cb)
4926 cb (EV_A_ EV_PREPARE, prepares [i]);
4930 if (types & EV_CHECK)
4931 for (i = checkcnt; i--; )
4932 cb (EV_A_ EV_CHECK, checks [i]);
4935 #if EV_SIGNAL_ENABLE
4936 if (types & EV_SIGNAL)
4937 for (i = 0; i < EV_NSIG - 1; ++i)
4938 for (wl = signals [i].head; wl; )
4941 cb (EV_A_ EV_SIGNAL, wl);
4947 if (types & EV_CHILD)
4948 for (i = (EV_PID_HASHSIZE); i--; )
4949 for (wl = childs [i]; wl; )
4952 cb (EV_A_ EV_CHILD, wl);
4956 /* EV_STAT 0x00001000 /* stat data changed */
4957 /* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4962 #include "ev_wrap.h"