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 #ifndef EV_USE_MONOTONIC
262 # if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
263 # define EV_USE_MONOTONIC EV_FEATURE_OS
265 # define EV_USE_MONOTONIC 0
269 #ifndef EV_USE_REALTIME
270 # define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
273 #ifndef EV_USE_NANOSLEEP
274 # if _POSIX_C_SOURCE >= 199309L
275 # define EV_USE_NANOSLEEP EV_FEATURE_OS
277 # define EV_USE_NANOSLEEP 0
281 #ifndef EV_USE_SELECT
282 # define EV_USE_SELECT EV_FEATURE_BACKENDS
287 # define EV_USE_POLL 0
289 # define EV_USE_POLL EV_FEATURE_BACKENDS
294 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
295 # define EV_USE_EPOLL EV_FEATURE_BACKENDS
297 # define EV_USE_EPOLL 0
301 #ifndef EV_USE_KQUEUE
302 # define EV_USE_KQUEUE 0
306 # define EV_USE_PORT 0
309 #ifndef EV_USE_INOTIFY
310 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
311 # define EV_USE_INOTIFY EV_FEATURE_OS
313 # define EV_USE_INOTIFY 0
317 #ifndef EV_PID_HASHSIZE
318 # define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
321 #ifndef EV_INOTIFY_HASHSIZE
322 # define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
325 #ifndef EV_USE_EVENTFD
326 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
327 # define EV_USE_EVENTFD EV_FEATURE_OS
329 # define EV_USE_EVENTFD 0
333 #ifndef EV_USE_SIGNALFD
334 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
335 # define EV_USE_SIGNALFD EV_FEATURE_OS
337 # define EV_USE_SIGNALFD 0
341 #if 0 /* debugging */
343 # define EV_USE_4HEAP 1
344 # define EV_HEAP_CACHE_AT 1
348 # define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
352 # define EV_USE_4HEAP EV_FEATURE_DATA
355 #ifndef EV_HEAP_CACHE_AT
356 # define EV_HEAP_CACHE_AT EV_FEATURE_DATA
360 /* supposedly, android doesn't typedef fd_mask */
361 # undef EV_USE_SELECT
362 # define EV_USE_SELECT 0
363 /* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
364 # undef EV_USE_CLOCK_SYSCALL
365 # define EV_USE_CLOCK_SYSCALL 0
368 /* aix's poll.h seems to cause lots of trouble */
370 /* AIX has a completely broken poll.h header */
372 # define EV_USE_POLL 0
375 /* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
376 /* which makes programs even slower. might work on other unices, too. */
377 #if EV_USE_CLOCK_SYSCALL
378 # include <sys/syscall.h>
379 # ifdef SYS_clock_gettime
380 # define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
381 # undef EV_USE_MONOTONIC
382 # define EV_USE_MONOTONIC 1
384 # undef EV_USE_CLOCK_SYSCALL
385 # define EV_USE_CLOCK_SYSCALL 0
389 /* this block fixes any misconfiguration where we know we run into trouble otherwise */
391 #ifndef CLOCK_MONOTONIC
392 # undef EV_USE_MONOTONIC
393 # define EV_USE_MONOTONIC 0
396 #ifndef CLOCK_REALTIME
397 # undef EV_USE_REALTIME
398 # define EV_USE_REALTIME 0
402 # undef EV_USE_INOTIFY
403 # define EV_USE_INOTIFY 0
406 #if !EV_USE_NANOSLEEP
407 /* hp-ux has it in sys/time.h, which we unconditionally include above */
408 # if !defined _WIN32 && !defined __hpux
409 # include <sys/select.h>
414 # include <sys/statfs.h>
415 # include <sys/inotify.h>
416 /* some very old inotify.h headers don't have IN_DONT_FOLLOW */
417 # ifndef IN_DONT_FOLLOW
418 # undef EV_USE_INOTIFY
419 # define EV_USE_INOTIFY 0
424 /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
426 # ifndef EFD_NONBLOCK
427 # define EFD_NONBLOCK O_NONBLOCK
431 # define EFD_CLOEXEC O_CLOEXEC
433 # define EFD_CLOEXEC 02000000
436 EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
440 /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
442 # ifndef SFD_NONBLOCK
443 # define SFD_NONBLOCK O_NONBLOCK
447 # define SFD_CLOEXEC O_CLOEXEC
449 # define SFD_CLOEXEC 02000000
452 EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
454 struct signalfd_siginfo
457 char pad[128 - sizeof (uint32_t)];
464 # define EV_FREQUENT_CHECK ev_verify (EV_A)
466 # define EV_FREQUENT_CHECK do { } while (0)
470 * This is used to work around floating point rounding problems.
471 * This value is good at least till the year 4000.
473 #define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
474 /*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
476 #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
477 #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
479 #define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
480 #define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
482 /* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
485 * libecb - http://software.schmorp.de/pkg/libecb
487 * Copyright (©) 2009-2014 Marc Alexander Lehmann <libecb@schmorp.de>
488 * Copyright (©) 2011 Emanuele Giaquinta
489 * All rights reserved.
491 * Redistribution and use in source and binary forms, with or without modifica-
492 * tion, are permitted provided that the following conditions are met:
494 * 1. Redistributions of source code must retain the above copyright notice,
495 * this list of conditions and the following disclaimer.
497 * 2. Redistributions in binary form must reproduce the above copyright
498 * notice, this list of conditions and the following disclaimer in the
499 * documentation and/or other materials provided with the distribution.
501 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
502 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
503 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
504 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
505 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
506 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
507 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
508 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
509 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
510 * OF THE POSSIBILITY OF SUCH DAMAGE.
512 * Alternatively, the contents of this file may be used under the terms of
513 * the GNU General Public License ("GPL") version 2 or any later version,
514 * in which case the provisions of the GPL are applicable instead of
515 * the above. If you wish to allow the use of your version of this file
516 * only under the terms of the GPL and not to allow others to use your
517 * version of this file under the BSD license, indicate your decision
518 * by deleting the provisions above and replace them with the notice
519 * and other provisions required by the GPL. If you do not delete the
520 * provisions above, a recipient may use your version of this file under
521 * either the BSD or the GPL.
527 /* 16 bits major, 16 bits minor */
528 #define ECB_VERSION 0x00010003
531 typedef signed char int8_t;
532 typedef unsigned char uint8_t;
533 typedef signed short int16_t;
534 typedef unsigned short uint16_t;
535 typedef signed int int32_t;
536 typedef unsigned int uint32_t;
538 typedef signed long long int64_t;
539 typedef unsigned long long uint64_t;
540 #else /* _MSC_VER || __BORLANDC__ */
541 typedef signed __int64 int64_t;
542 typedef unsigned __int64 uint64_t;
545 #define ECB_PTRSIZE 8
546 typedef uint64_t uintptr_t;
547 typedef int64_t intptr_t;
549 #define ECB_PTRSIZE 4
550 typedef uint32_t uintptr_t;
551 typedef int32_t intptr_t;
554 #include <inttypes.h>
555 #if UINTMAX_MAX > 0xffffffffU
556 #define ECB_PTRSIZE 8
558 #define ECB_PTRSIZE 4
562 /* work around x32 idiocy by defining proper macros */
563 #if __amd64 || __x86_64 || _M_AMD64 || _M_X64
565 #define ECB_AMD64_X32 1
571 /* many compilers define _GNUC_ to some versions but then only implement
572 * what their idiot authors think are the "more important" extensions,
573 * causing enormous grief in return for some better fake benchmark numbers.
575 * we try to detect these and simply assume they are not gcc - if they have
576 * an issue with that they should have done it right in the first place.
578 #ifndef ECB_GCC_VERSION
579 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
580 #define ECB_GCC_VERSION(major,minor) 0
582 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
586 #define ECB_CPP (__cplusplus+0)
587 #define ECB_CPP11 (__cplusplus >= 201103L)
591 #define ECB_STDC_VERSION 0
594 #define ECB_STDC_VERSION __STDC_VERSION__
597 #define ECB_C99 (ECB_STDC_VERSION >= 199901L)
598 #define ECB_C11 (ECB_STDC_VERSION >= 201112L)
601 #define ECB_EXTERN_C extern "C"
602 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
603 #define ECB_EXTERN_C_END }
605 #define ECB_EXTERN_C extern
606 #define ECB_EXTERN_C_BEG
607 #define ECB_EXTERN_C_END
610 /*****************************************************************************/
612 /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
613 /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
620 #define ECB_MEMORY_FENCE do { } while (0)
623 #ifndef ECB_MEMORY_FENCE
624 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
625 #if __i386 || __i386__
626 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
627 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
628 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
629 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
630 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
631 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
632 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
633 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
634 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
635 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
636 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
637 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
638 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
639 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
640 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
642 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
643 #elif (__sparc || __sparc__) && !__sparcv8
644 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
645 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
646 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
647 #elif defined __s390__ || defined __s390x__
648 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
649 #elif defined __mips__
650 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
651 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
652 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
653 #elif defined __alpha__
654 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
655 #elif defined __hppa__
656 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
657 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
658 #elif defined __ia64__
659 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
660 #elif defined __m68k__
661 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
662 #elif defined __m88k__
663 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
665 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
670 #ifndef ECB_MEMORY_FENCE
671 #if ECB_GCC_VERSION(4,7)
672 /* see comment below (stdatomic.h) about the C11 memory model. */
673 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
674 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
675 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
677 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
678 * without risking compile time errors with other compilers. We *could*
679 * define our own ecb_clang_has_feature, but I just can't be bothered to work
680 * around this shit time and again.
681 * #elif defined __clang && __has_feature (cxx_atomic)
682 * // see comment below (stdatomic.h) about the C11 memory model.
683 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
684 * #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
685 * #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
688 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
689 #define ECB_MEMORY_FENCE __sync_synchronize ()
690 #elif _MSC_VER >= 1500 /* VC++ 2008 */
691 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
692 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
693 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
694 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
695 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
696 #elif _MSC_VER >= 1400 /* VC++ 2005 */
697 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
698 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
699 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
700 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
703 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
704 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
705 #include <mbarrier.h>
706 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
707 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
708 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
710 #define ECB_MEMORY_FENCE __sync ()
714 #ifndef ECB_MEMORY_FENCE
715 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
716 /* we assume that these memory fences work on all variables/all memory accesses, */
717 /* not just C11 atomics and atomic accesses */
718 #include <stdatomic.h>
719 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
720 /* any fence other than seq_cst, which isn't very efficient for us. */
721 /* Why that is, we don't know - either the C11 memory model is quite useless */
722 /* for most usages, or gcc and clang have a bug */
723 /* I *currently* lean towards the latter, and inefficiently implement */
724 /* all three of ecb's fences as a seq_cst fence */
725 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
726 /* for all __atomic_thread_fence's except seq_cst */
727 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
731 #ifndef ECB_MEMORY_FENCE
732 #if !ECB_AVOID_PTHREADS
734 * if you get undefined symbol references to pthread_mutex_lock,
735 * or failure to find pthread.h, then you should implement
736 * the ECB_MEMORY_FENCE operations for your cpu/compiler
737 * OR provide pthread.h and link against the posix thread library
741 #define ECB_NEEDS_PTHREADS 1
742 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
744 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
745 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
749 #if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
750 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
753 #if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
754 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
757 /*****************************************************************************/
760 #define ecb_inline static inline
761 #elif ECB_GCC_VERSION(2,5)
762 #define ecb_inline static __inline__
764 #define ecb_inline static inline
766 #define ecb_inline static
769 #if ECB_GCC_VERSION(3,3)
770 #define ecb_restrict __restrict__
772 #define ecb_restrict restrict
777 typedef int ecb_bool;
779 #define ECB_CONCAT_(a, b) a ## b
780 #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
781 #define ECB_STRINGIFY_(a) # a
782 #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
784 #define ecb_function_ ecb_inline
786 #if ECB_GCC_VERSION(3,1)
787 #define ecb_attribute(attrlist) __attribute__(attrlist)
788 #define ecb_is_constant(expr) __builtin_constant_p (expr)
789 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
790 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
792 #define ecb_attribute(attrlist)
794 /* possible C11 impl for integral types
795 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
796 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
798 #define ecb_is_constant(expr) 0
799 #define ecb_expect(expr,value) (expr)
800 #define ecb_prefetch(addr,rw,locality)
803 /* no emulation for ecb_decltype */
804 #if ECB_GCC_VERSION(4,5)
805 #define ecb_decltype(x) __decltype(x)
806 #elif ECB_GCC_VERSION(3,0)
807 #define ecb_decltype(x) __typeof(x)
811 #define ecb_deprecated __declspec(deprecated)
813 #define ecb_deprecated ecb_attribute ((__deprecated__))
816 #define ecb_noinline ecb_attribute ((__noinline__))
817 #define ecb_unused ecb_attribute ((__unused__))
818 #define ecb_const ecb_attribute ((__const__))
819 #define ecb_pure ecb_attribute ((__pure__))
821 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */
823 #define ecb_noreturn _Noreturn
825 #define ecb_noreturn ecb_attribute ((__noreturn__))
828 #if ECB_GCC_VERSION(4,3)
829 #define ecb_artificial ecb_attribute ((__artificial__))
830 #define ecb_hot ecb_attribute ((__hot__))
831 #define ecb_cold ecb_attribute ((__cold__))
833 #define ecb_artificial
838 /* put around conditional expressions if you are very sure that the */
839 /* expression is mostly true or mostly false. note that these return */
840 /* booleans, not the expression. */
841 #define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
842 #define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
843 /* for compatibility to the rest of the world */
844 #define ecb_likely(expr) ecb_expect_true (expr)
845 #define ecb_unlikely(expr) ecb_expect_false (expr)
847 /* count trailing zero bits and count # of one bits */
848 #if ECB_GCC_VERSION(3,4)
849 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
850 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
851 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
852 #define ecb_ctz32(x) __builtin_ctz (x)
853 #define ecb_ctz64(x) __builtin_ctzll (x)
854 #define ecb_popcount32(x) __builtin_popcount (x)
857 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
859 ecb_ctz32 (uint32_t x)
863 x &= ~x + 1; /* this isolates the lowest bit */
865 #if ECB_branchless_on_i386
866 r += !!(x & 0xaaaaaaaa) << 0;
867 r += !!(x & 0xcccccccc) << 1;
868 r += !!(x & 0xf0f0f0f0) << 2;
869 r += !!(x & 0xff00ff00) << 3;
870 r += !!(x & 0xffff0000) << 4;
872 if (x & 0xaaaaaaaa) r += 1;
873 if (x & 0xcccccccc) r += 2;
874 if (x & 0xf0f0f0f0) r += 4;
875 if (x & 0xff00ff00) r += 8;
876 if (x & 0xffff0000) r += 16;
882 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
884 ecb_ctz64 (uint64_t x)
886 int shift = x & 0xffffffffU ? 0 : 32;
887 return ecb_ctz32 (x >> shift) + shift;
890 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
892 ecb_popcount32 (uint32_t x)
894 x -= (x >> 1) & 0x55555555;
895 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
896 x = ((x >> 4) + x) & 0x0f0f0f0f;
902 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
903 ecb_function_ int ecb_ld32 (uint32_t x)
907 if (x >> 16) { x >>= 16; r += 16; }
908 if (x >> 8) { x >>= 8; r += 8; }
909 if (x >> 4) { x >>= 4; r += 4; }
910 if (x >> 2) { x >>= 2; r += 2; }
911 if (x >> 1) { r += 1; }
916 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
917 ecb_function_ int ecb_ld64 (uint64_t x)
921 if (x >> 32) { x >>= 32; r += 32; }
923 return r + ecb_ld32 (x);
927 ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
928 ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
929 ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
930 ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
932 ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
933 ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
935 return ( (x * 0x0802U & 0x22110U)
936 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
939 ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
940 ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
942 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
943 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
944 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
945 x = ( x >> 8 ) | ( x << 8);
950 ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
951 ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
953 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
954 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
955 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
956 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
957 x = ( x >> 16 ) | ( x << 16);
962 /* popcount64 is only available on 64 bit cpus as gcc builtin */
963 /* so for this version we are lazy */
964 ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
966 ecb_popcount64 (uint64_t x)
968 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
971 ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
972 ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
973 ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
974 ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
975 ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
976 ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
977 ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
978 ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
980 ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
981 ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
982 ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
983 ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
984 ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
985 ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
986 ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
987 ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
989 #if ECB_GCC_VERSION(4,3)
990 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
991 #define ecb_bswap32(x) __builtin_bswap32 (x)
992 #define ecb_bswap64(x) __builtin_bswap64 (x)
994 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
995 ecb_function_ uint16_t
996 ecb_bswap16 (uint16_t x)
998 return ecb_rotl16 (x, 8);
1001 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
1002 ecb_function_ uint32_t
1003 ecb_bswap32 (uint32_t x)
1005 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1008 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
1009 ecb_function_ uint64_t
1010 ecb_bswap64 (uint64_t x)
1012 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1016 #if ECB_GCC_VERSION(4,5)
1017 #define ecb_unreachable() __builtin_unreachable ()
1019 /* this seems to work fine, but gcc always emits a warning for it :/ */
1020 ecb_inline void ecb_unreachable (void) ecb_noreturn;
1021 ecb_inline void ecb_unreachable (void) { }
1024 /* try to tell the compiler that some condition is definitely true */
1025 #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1027 ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
1028 ecb_inline unsigned char
1029 ecb_byteorder_helper (void)
1031 /* the union code still generates code under pressure in gcc, */
1032 /* but less than using pointers, and always seems to */
1033 /* successfully return a constant. */
1034 /* the reason why we have this horrible preprocessor mess */
1035 /* is to avoid it in all cases, at least on common architectures */
1036 /* or when using a recent enough gcc version (>= 4.6) */
1037 #if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
1039 #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
1041 #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
1048 } u = { 0x11223344 };
1053 ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
1054 ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
1055 ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
1056 ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
1058 #if ECB_GCC_VERSION(3,0) || ECB_C99
1059 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1061 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1065 template<typename T>
1066 static inline T ecb_div_rd (T val, T div)
1068 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1070 template<typename T>
1071 static inline T ecb_div_ru (T val, T div)
1073 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1076 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1077 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1080 #if ecb_cplusplus_does_not_suck
1081 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1082 template<typename T, int N>
1083 static inline int ecb_array_length (const T (&arr)[N])
1088 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1091 /*******************************************************************************/
1092 /* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1094 /* basically, everything uses "ieee pure-endian" floating point numbers */
1095 /* the only noteworthy exception is ancient armle, which uses order 43218765 */
1097 || __i386 || __i386__ \
1098 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1099 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1100 || defined __s390__ || defined __s390x__ \
1101 || defined __mips__ \
1102 || defined __alpha__ \
1103 || defined __hppa__ \
1104 || defined __ia64__ \
1105 || defined __m68k__ \
1106 || defined __m88k__ \
1108 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \
1109 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1110 || defined __aarch64__
1112 #include <string.h> /* for memcpy */
1119 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1121 /* only the oldest of old doesn't have this one. solaris. */
1123 #define ECB_INFINITY INFINITY
1125 #define ECB_INFINITY HUGE_VAL
1131 #define ECB_NAN ECB_INFINITY
1134 /* converts an ieee half/binary16 to a float */
1135 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;
1137 ecb_binary16_to_float (uint16_t x)
1139 int e = (x >> 10) & 0x1f;
1143 if (!e ) r = ldexpf (m , -24);
1144 else if (e != 31) r = ldexpf (m + 0x400, e - 25);
1145 else if (m ) r = ECB_NAN;
1146 else r = ECB_INFINITY;
1148 return x & 0x8000 ? -r : r;
1151 /* convert a float to ieee single/binary32 */
1152 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1153 ecb_function_ uint32_t
1154 ecb_float_to_binary32 (float x)
1161 /* slow emulation, works for anything but -0 */
1165 if (x == 0e0f ) return 0x00000000U;
1166 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1167 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1168 if (x != x ) return 0x7fbfffffU;
1170 m = frexpf (x, &e) * 0x1000000U;
1172 r = m & 0x80000000U;
1184 r |= (e + 126) << 23;
1191 /* converts an ieee single/binary32 to a float */
1192 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1194 ecb_binary32_to_float (uint32_t x)
1201 /* emulation, only works for normals and subnormals and +0 */
1203 int e = (x >> 23) & 0xffU;
1212 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1213 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1221 /* convert a double to ieee double/binary64 */
1222 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1223 ecb_function_ uint64_t
1224 ecb_double_to_binary64 (double x)
1231 /* slow emulation, works for anything but -0 */
1235 if (x == 0e0 ) return 0x0000000000000000U;
1236 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1237 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1238 if (x != x ) return 0X7ff7ffffffffffffU;
1240 m = frexp (x, &e) * 0x20000000000000U;
1242 r = m & 0x8000000000000000;;
1249 m &= 0x1fffffffffffffU;
1254 r |= ((uint64_t)(e + 1022)) << 52;
1255 r |= m & 0xfffffffffffffU;
1261 /* converts an ieee double/binary64 to a double */
1262 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1263 ecb_function_ double
1264 ecb_binary64_to_double (uint64_t x)
1271 /* emulation, only works for normals and subnormals and +0 */
1273 int e = (x >> 52) & 0x7ffU;
1275 x &= 0xfffffffffffffU;
1278 x |= 0x10000000000000U;
1282 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1283 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1297 #if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1298 /* if your architecture doesn't need memory fences, e.g. because it is
1299 * single-cpu/core, or if you use libev in a project that doesn't use libev
1300 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1301 * libev, in which cases the memory fences become nops.
1302 * alternatively, you can remove this #error and link against libpthread,
1303 * which will then provide the memory fences.
1305 # error "memory fences not defined for your architecture, please report"
1308 #ifndef ECB_MEMORY_FENCE
1309 # define ECB_MEMORY_FENCE do { } while (0)
1310 # define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1311 # define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1314 #define expect_false(cond) ecb_expect_false (cond)
1315 #define expect_true(cond) ecb_expect_true (cond)
1316 #define noinline ecb_noinline
1318 #define inline_size ecb_inline
1321 # define inline_speed ecb_inline
1323 # define inline_speed static noinline
1326 #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1328 #if EV_MINPRI == EV_MAXPRI
1329 # define ABSPRI(w) (((W)w), 0)
1331 # define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1334 #define EMPTY /* required for microsofts broken pseudo-c compiler */
1335 #define EMPTY2(a,b) /* used to suppress some warnings */
1337 typedef ev_watcher *W;
1338 typedef ev_watcher_list *WL;
1339 typedef ev_watcher_time *WT;
1341 #define ev_active(w) ((W)(w))->active
1342 #define ev_at(w) ((WT)(w))->at
1345 /* sig_atomic_t is used to avoid per-thread variables or locking but still */
1346 /* giving it a reasonably high chance of working on typical architectures */
1347 static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1350 #if EV_USE_MONOTONIC
1351 static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1354 #ifndef EV_FD_TO_WIN32_HANDLE
1355 # define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1357 #ifndef EV_WIN32_HANDLE_TO_FD
1358 # define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1360 #ifndef EV_WIN32_CLOSE_FD
1361 # define EV_WIN32_CLOSE_FD(fd) close (fd)
1365 # include "ev_win32.c"
1368 /*****************************************************************************/
1370 /* define a suitable floor function (only used by periodics atm) */
1374 # define ev_floor(v) floor (v)
1379 /* a floor() replacement function, should be independent of ev_tstamp type */
1380 static ev_tstamp noinline
1381 ev_floor (ev_tstamp v)
1383 /* the choice of shift factor is not terribly important */
1384 #if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1385 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1387 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1390 /* argument too large for an unsigned long? */
1391 if (expect_false (v >= shift))
1396 return v; /* very large number */
1398 f = shift * ev_floor (v * (1. / shift));
1399 return f + ev_floor (v - f);
1402 /* special treatment for negative args? */
1403 if (expect_false (v < 0.))
1405 ev_tstamp f = -ev_floor (-v);
1407 return f - (f == v ? 0 : 1);
1410 /* fits into an unsigned long */
1411 return (unsigned long)v;
1416 /*****************************************************************************/
1419 # include <sys/utsname.h>
1422 static unsigned int noinline ecb_cold
1423 ev_linux_version (void)
1429 char *p = buf.release;
1434 for (i = 3+1; --i; )
1440 if (*p >= '0' && *p <= '9')
1441 c = c * 10 + *p++ - '0';
1458 /*****************************************************************************/
1461 static void noinline ecb_cold
1462 ev_printerr (const char *msg)
1464 write (STDERR_FILENO, msg, strlen (msg));
1468 static void (*syserr_cb)(const char *msg) EV_THROW;
1471 ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
1476 static void noinline ecb_cold
1477 ev_syserr (const char *msg)
1480 msg = "(libev) system error";
1489 ev_printerr (strerror (errno));
1499 ev_realloc_emul (void *ptr, long size) EV_THROW
1501 /* some systems, notably openbsd and darwin, fail to properly
1502 * implement realloc (x, 0) (as required by both ansi c-89 and
1503 * the single unix specification, so work around them here.
1504 * recently, also (at least) fedora and debian started breaking it,
1505 * despite documenting it otherwise.
1509 return realloc (ptr, size);
1515 static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
1518 ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
1524 ev_realloc (void *ptr, long size)
1526 ptr = alloc (ptr, size);
1531 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1533 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1541 #define ev_malloc(size) ev_realloc (0, (size))
1542 #define ev_free(ptr) ev_realloc ((ptr), 0)
1544 /*****************************************************************************/
1546 /* set in reify when reification needed */
1547 #define EV_ANFD_REIFY 1
1549 /* file descriptor info structure */
1553 unsigned char events; /* the events watched for */
1554 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1555 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
1556 unsigned char unused;
1558 unsigned int egen; /* generation counter to counter epoll bugs */
1560 #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1568 /* stores the pending event set for a given watcher */
1572 int events; /* the pending event set for the given watcher */
1576 /* hash table entry per inotify-id */
1584 #if EV_HEAP_CACHE_AT
1585 /* a heap element */
1591 #define ANHE_w(he) (he).w /* access watcher, read-write */
1592 #define ANHE_at(he) (he).at /* access cached at, read-only */
1593 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1595 /* a heap element */
1598 #define ANHE_w(he) (he)
1599 #define ANHE_at(he) (he)->at
1600 #define ANHE_at_cache(he)
1607 ev_tstamp ev_rt_now;
1608 #define ev_rt_now ((loop)->ev_rt_now)
1609 #define VAR(name,decl) decl;
1610 #include "ev_vars.h"
1613 #include "ev_wrap.h"
1615 static struct ev_loop default_loop_struct;
1616 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
1620 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
1621 #define VAR(name,decl) static decl;
1622 #include "ev_vars.h"
1625 static int ev_default_loop_ptr;
1630 # define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1631 # define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1632 # define EV_INVOKE_PENDING invoke_cb (EV_A)
1634 # define EV_RELEASE_CB (void)0
1635 # define EV_ACQUIRE_CB (void)0
1636 # define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1639 #define EVBREAK_RECURSE 0x80
1641 /*****************************************************************************/
1643 #ifndef EV_HAVE_EV_TIME
1645 ev_time (void) EV_THROW
1648 if (expect_true (have_realtime))
1651 clock_gettime (CLOCK_REALTIME, &ts);
1652 return ts.tv_sec + ts.tv_nsec * 1e-9;
1657 gettimeofday (&tv, 0);
1658 return tv.tv_sec + tv.tv_usec * 1e-6;
1662 inline_size ev_tstamp
1665 #if EV_USE_MONOTONIC
1666 if (expect_true (have_monotonic))
1669 clock_gettime (CLOCK_MONOTONIC, &ts);
1670 return ts.tv_sec + ts.tv_nsec * 1e-9;
1679 ev_now (EV_P) EV_THROW
1686 ev_sleep (ev_tstamp delay) EV_THROW
1690 #if EV_USE_NANOSLEEP
1693 EV_TS_SET (ts, delay);
1695 #elif defined _WIN32
1696 Sleep ((unsigned long)(delay * 1e3));
1700 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1701 /* something not guaranteed by newer posix versions, but guaranteed */
1703 EV_TV_SET (tv, delay);
1704 select (0, 0, 0, 0, &tv);
1709 /*****************************************************************************/
1711 #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1713 /* find a suitable new size for the given array, */
1714 /* hopefully by rounding to a nice-to-malloc size */
1716 array_nextsize (int elem, int cur, int cnt)
1724 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
1725 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
1728 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
1729 ncur = ncur - sizeof (void *) * 4;
1736 static void * noinline ecb_cold
1737 array_realloc (int elem, void *base, int *cur, int cnt)
1739 *cur = array_nextsize (elem, *cur, cnt);
1740 return ev_realloc (base, elem * *cur);
1743 #define array_init_zero(base,count) \
1744 memset ((void *)(base), 0, sizeof (*(base)) * (count))
1746 #define array_needsize(type,base,cur,cnt,init) \
1747 if (expect_false ((cnt) > (cur))) \
1749 int ecb_unused ocur_ = (cur); \
1750 (base) = (type *)array_realloc \
1751 (sizeof (type), (base), &(cur), (cnt)); \
1752 init ((base) + (ocur_), (cur) - ocur_); \
1756 #define array_slim(type,stem) \
1757 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
1759 stem ## max = array_roundsize (stem ## cnt >> 1); \
1760 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
1761 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
1765 #define array_free(stem, idx) \
1766 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
1768 /*****************************************************************************/
1770 /* dummy callback for pending events */
1771 static void noinline
1772 pendingcb (EV_P_ ev_prepare *w, int revents)
1777 ev_feed_event (EV_P_ void *w, int revents) EV_THROW
1780 int pri = ABSPRI (w_);
1782 if (expect_false (w_->pending))
1783 pendings [pri][w_->pending - 1].events |= revents;
1786 w_->pending = ++pendingcnt [pri];
1787 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1788 pendings [pri][w_->pending - 1].w = w_;
1789 pendings [pri][w_->pending - 1].events = revents;
1792 pendingpri = NUMPRI - 1;
1796 feed_reverse (EV_P_ W w)
1798 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1799 rfeeds [rfeedcnt++] = w;
1803 feed_reverse_done (EV_P_ int revents)
1806 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1811 queue_events (EV_P_ W *events, int eventcnt, int type)
1815 for (i = 0; i < eventcnt; ++i)
1816 ev_feed_event (EV_A_ events [i], type);
1819 /*****************************************************************************/
1822 fd_event_nocheck (EV_P_ int fd, int revents)
1824 ANFD *anfd = anfds + fd;
1827 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1829 int ev = w->events & revents;
1832 ev_feed_event (EV_A_ (W)w, ev);
1836 /* do not submit kernel events for fds that have reify set */
1837 /* because that means they changed while we were polling for new events */
1839 fd_event (EV_P_ int fd, int revents)
1841 ANFD *anfd = anfds + fd;
1843 if (expect_true (!anfd->reify))
1844 fd_event_nocheck (EV_A_ fd, revents);
1848 ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
1850 if (fd >= 0 && fd < anfdmax)
1851 fd_event_nocheck (EV_A_ fd, revents);
1854 /* make sure the external fd watch events are in-sync */
1855 /* with the kernel/libev internal state */
1861 #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1862 for (i = 0; i < fdchangecnt; ++i)
1864 int fd = fdchanges [i];
1865 ANFD *anfd = anfds + fd;
1867 if (anfd->reify & EV__IOFDSET && anfd->head)
1869 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1871 if (handle != anfd->handle)
1875 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1877 /* handle changed, but fd didn't - we need to do it in two steps */
1878 backend_modify (EV_A_ fd, anfd->events, 0);
1880 anfd->handle = handle;
1886 for (i = 0; i < fdchangecnt; ++i)
1888 int fd = fdchanges [i];
1889 ANFD *anfd = anfds + fd;
1892 unsigned char o_events = anfd->events;
1893 unsigned char o_reify = anfd->reify;
1897 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1901 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1902 anfd->events |= (unsigned char)w->events;
1904 if (o_events != anfd->events)
1905 o_reify = EV__IOFDSET; /* actually |= */
1908 if (o_reify & EV__IOFDSET)
1909 backend_modify (EV_A_ fd, o_events, anfd->events);
1915 /* something about the given fd changed */
1917 fd_change (EV_P_ int fd, int flags)
1919 unsigned char reify = anfds [fd].reify;
1920 anfds [fd].reify |= flags;
1922 if (expect_true (!reify))
1925 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
1926 fdchanges [fdchangecnt - 1] = fd;
1930 /* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1931 inline_speed void ecb_cold
1932 fd_kill (EV_P_ int fd)
1936 while ((w = (ev_io *)anfds [fd].head))
1938 ev_io_stop (EV_A_ w);
1939 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1943 /* check whether the given fd is actually valid, for error recovery */
1944 inline_size int ecb_cold
1948 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1950 return fcntl (fd, F_GETFD) != -1;
1954 /* called on EBADF to verify fds */
1955 static void noinline ecb_cold
1960 for (fd = 0; fd < anfdmax; ++fd)
1961 if (anfds [fd].events)
1962 if (!fd_valid (fd) && errno == EBADF)
1966 /* called on ENOMEM in select/poll to kill some fds and retry */
1967 static void noinline ecb_cold
1972 for (fd = anfdmax; fd--; )
1973 if (anfds [fd].events)
1980 /* usually called after fork if backend needs to re-arm all fds from scratch */
1981 static void noinline
1986 for (fd = 0; fd < anfdmax; ++fd)
1987 if (anfds [fd].events)
1989 anfds [fd].events = 0;
1990 anfds [fd].emask = 0;
1991 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1995 /* used to prepare libev internal fd's */
1996 /* this is not fork-safe */
2001 unsigned long arg = 1;
2002 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
2004 fcntl (fd, F_SETFD, FD_CLOEXEC);
2005 fcntl (fd, F_SETFL, O_NONBLOCK);
2009 /*****************************************************************************/
2012 * the heap functions want a real array index. array index 0 is guaranteed to not
2013 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
2014 * the branching factor of the d-tree.
2018 * at the moment we allow libev the luxury of two heaps,
2019 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
2020 * which is more cache-efficient.
2021 * the difference is about 5% with 50000+ watchers.
2026 #define HEAP0 (DHEAP - 1) /* index of first element in heap */
2027 #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
2028 #define UPHEAP_DONE(p,k) ((p) == (k))
2030 /* away from the root */
2032 downheap (ANHE *heap, int N, int k)
2035 ANHE *E = heap + N + HEAP0;
2041 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
2043 /* find minimum child */
2044 if (expect_true (pos + DHEAP - 1 < E))
2046 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2047 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2048 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2049 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2053 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2054 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2055 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2056 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2061 if (ANHE_at (he) <= minat)
2065 ev_active (ANHE_w (*minpos)) = k;
2071 ev_active (ANHE_w (he)) = k;
2077 #define HPARENT(k) ((k) >> 1)
2078 #define UPHEAP_DONE(p,k) (!(p))
2080 /* away from the root */
2082 downheap (ANHE *heap, int N, int k)
2093 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
2096 if (ANHE_at (he) <= ANHE_at (heap [c]))
2099 heap [k] = heap [c];
2100 ev_active (ANHE_w (heap [k])) = k;
2106 ev_active (ANHE_w (he)) = k;
2110 /* towards the root */
2112 upheap (ANHE *heap, int k)
2118 int p = HPARENT (k);
2120 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
2123 heap [k] = heap [p];
2124 ev_active (ANHE_w (heap [k])) = k;
2129 ev_active (ANHE_w (he)) = k;
2132 /* move an element suitably so it is in a correct place */
2134 adjustheap (ANHE *heap, int N, int k)
2136 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
2139 downheap (heap, N, k);
2142 /* rebuild the heap: this function is used only once and executed rarely */
2144 reheap (ANHE *heap, int N)
2148 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
2149 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
2150 for (i = 0; i < N; ++i)
2151 upheap (heap, i + HEAP0);
2154 /*****************************************************************************/
2156 /* associate signal watchers to a signal signal */
2159 EV_ATOMIC_T pending;
2166 static ANSIG signals [EV_NSIG - 1];
2168 /*****************************************************************************/
2170 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2172 static void noinline ecb_cold
2175 if (!ev_is_active (&pipe_w))
2181 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2182 if (fds [1] < 0 && errno == EINVAL)
2183 fds [1] = eventfd (0, 0);
2189 ev_syserr ("(libev) error creating signal/async pipe");
2191 fd_intern (fds [0]);
2194 evpipe [0] = fds [0];
2197 evpipe [1] = fds [1]; /* first call, set write fd */
2200 /* on subsequent calls, do not change evpipe [1] */
2201 /* so that evpipe_write can always rely on its value. */
2202 /* this branch does not do anything sensible on windows, */
2203 /* so must not be executed on windows */
2205 dup2 (fds [1], evpipe [1]);
2209 fd_intern (evpipe [1]);
2211 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2212 ev_io_start (EV_A_ &pipe_w);
2213 ev_unref (EV_A); /* watcher should not keep loop alive */
2218 evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2220 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2222 if (expect_true (*flag))
2226 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2228 pipe_write_skipped = 1;
2230 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2232 if (pipe_write_wanted)
2236 pipe_write_skipped = 0;
2237 ECB_MEMORY_FENCE_RELEASE;
2239 old_errno = errno; /* save errno because write will clobber it */
2244 uint64_t counter = 1;
2245 write (evpipe [1], &counter, sizeof (uint64_t));
2255 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2257 write (evpipe [1], &(evpipe [1]), 1);
2265 /* called whenever the libev signal pipe */
2266 /* got some events (signal, async) */
2268 pipecb (EV_P_ ev_io *iow, int revents)
2272 if (revents & EV_READ)
2278 read (evpipe [1], &counter, sizeof (uint64_t));
2289 buf.len = sizeof (dummy);
2290 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2292 read (evpipe [0], &dummy, sizeof (dummy));
2297 pipe_write_skipped = 0;
2299 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2301 #if EV_SIGNAL_ENABLE
2308 for (i = EV_NSIG - 1; i--; )
2309 if (expect_false (signals [i].pending))
2310 ev_feed_signal_event (EV_A_ i + 1);
2321 for (i = asynccnt; i--; )
2322 if (asyncs [i]->sent)
2324 asyncs [i]->sent = 0;
2325 ECB_MEMORY_FENCE_RELEASE;
2326 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
2332 /*****************************************************************************/
2335 ev_feed_signal (int signum) EV_THROW
2339 ECB_MEMORY_FENCE_ACQUIRE;
2340 EV_A = signals [signum - 1].loop;
2346 signals [signum - 1].pending = 1;
2347 evpipe_write (EV_A_ &sig_pending);
2351 ev_sighandler (int signum)
2354 signal (signum, ev_sighandler);
2357 ev_feed_signal (signum);
2361 ev_feed_signal_event (EV_P_ int signum) EV_THROW
2365 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2371 /* it is permissible to try to feed a signal to the wrong loop */
2372 /* or, likely more useful, feeding a signal nobody is waiting for */
2374 if (expect_false (signals [signum].loop != EV_A))
2378 signals [signum].pending = 0;
2379 ECB_MEMORY_FENCE_RELEASE;
2381 for (w = signals [signum].head; w; w = w->next)
2382 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2387 sigfdcb (EV_P_ ev_io *iow, int revents)
2389 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2393 ssize_t res = read (sigfd, si, sizeof (si));
2395 /* not ISO-C, as res might be -1, but works with SuS */
2396 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2397 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2399 if (res < (ssize_t)sizeof (si))
2407 /*****************************************************************************/
2410 static WL childs [EV_PID_HASHSIZE];
2412 static ev_signal childev;
2414 #ifndef WIFCONTINUED
2415 # define WIFCONTINUED(status) 0
2418 /* handle a single child status event */
2420 child_reap (EV_P_ int chain, int pid, int status)
2423 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
2425 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2427 if ((w->pid == pid || !w->pid)
2428 && (!traced || (w->flags & 1)))
2430 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
2432 w->rstatus = status;
2433 ev_feed_event (EV_A_ (W)w, EV_CHILD);
2439 # define WCONTINUED 0
2442 /* called on sigchld etc., calls waitpid */
2444 childcb (EV_P_ ev_signal *sw, int revents)
2448 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
2449 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
2452 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
2455 /* make sure we are called again until all children have been reaped */
2456 /* we need to do it this way so that the callback gets called before we continue */
2457 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
2459 child_reap (EV_A_ pid, pid, status);
2460 if ((EV_PID_HASHSIZE) > 1)
2461 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
2466 /*****************************************************************************/
2469 # include "ev_iocp.c"
2472 # include "ev_port.c"
2475 # include "ev_kqueue.c"
2478 # include "ev_epoll.c"
2481 # include "ev_poll.c"
2484 # include "ev_select.c"
2488 ev_version_major (void) EV_THROW
2490 return EV_VERSION_MAJOR;
2494 ev_version_minor (void) EV_THROW
2496 return EV_VERSION_MINOR;
2499 /* return true if we are running with elevated privileges and should ignore env variables */
2500 int inline_size ecb_cold
2501 enable_secure (void)
2506 return getuid () != geteuid ()
2507 || getgid () != getegid ();
2511 unsigned int ecb_cold
2512 ev_supported_backends (void) EV_THROW
2514 unsigned int flags = 0;
2516 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2517 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
2518 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2519 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2520 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2525 unsigned int ecb_cold
2526 ev_recommended_backends (void) EV_THROW
2528 unsigned int flags = ev_supported_backends ();
2531 /* kqueue is borked on everything but netbsd apparently */
2532 /* it usually doesn't work correctly on anything but sockets and pipes */
2533 flags &= ~EVBACKEND_KQUEUE;
2536 /* only select works correctly on that "unix-certified" platform */
2537 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2538 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2541 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2547 unsigned int ecb_cold
2548 ev_embeddable_backends (void) EV_THROW
2550 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2552 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2553 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2554 flags &= ~EVBACKEND_EPOLL;
2560 ev_backend (EV_P) EV_THROW
2567 ev_iteration (EV_P) EV_THROW
2573 ev_depth (EV_P) EV_THROW
2579 ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2581 io_blocktime = interval;
2585 ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2587 timeout_blocktime = interval;
2591 ev_set_userdata (EV_P_ void *data) EV_THROW
2597 ev_userdata (EV_P) EV_THROW
2603 ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
2605 invoke_cb = invoke_pending_cb;
2609 ev_set_loop_release_cb (EV_P_ ev_loop_callback_nothrow release, ev_loop_callback_nothrow acquire) EV_THROW
2611 release_cb = release;
2612 acquire_cb = acquire;
2616 /* initialise a loop structure, must be zero-initialised */
2617 static void noinline ecb_cold
2618 loop_init (EV_P_ unsigned int flags) EV_THROW
2629 if (!clock_gettime (CLOCK_REALTIME, &ts))
2634 #if EV_USE_MONOTONIC
2635 if (!have_monotonic)
2639 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
2644 /* pid check not overridable via env */
2646 if (flags & EVFLAG_FORKCHECK)
2650 if (!(flags & EVFLAG_NOENV)
2651 && !enable_secure ()
2652 && getenv ("LIBEV_FLAGS"))
2653 flags = atoi (getenv ("LIBEV_FLAGS"));
2655 ev_rt_now = ev_time ();
2656 mn_now = get_clock ();
2658 rtmn_diff = ev_rt_now - mn_now;
2660 invoke_cb = ev_invoke_pending;
2664 timeout_blocktime = 0.;
2671 pipe_write_skipped = 0;
2672 pipe_write_wanted = 0;
2676 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2679 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2682 if (!(flags & EVBACKEND_MASK))
2683 flags |= ev_recommended_backends ();
2686 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2689 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
2692 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
2695 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
2698 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
2701 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
2704 ev_prepare_init (&pending_w, pendingcb);
2706 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2707 ev_init (&pipe_w, pipecb);
2708 ev_set_priority (&pipe_w, EV_MAXPRI);
2713 /* free up a loop structure */
2715 ev_loop_destroy (EV_P)
2720 /* mimic free (0) */
2725 #if EV_CLEANUP_ENABLE
2726 /* queue cleanup watchers (and execute them) */
2727 if (expect_false (cleanupcnt))
2729 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2735 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2737 ev_ref (EV_A); /* child watcher */
2738 ev_signal_stop (EV_A_ &childev);
2742 if (ev_is_active (&pipe_w))
2745 /*ev_io_stop (EV_A_ &pipe_w);*/
2747 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2748 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2752 if (ev_is_active (&sigfd_w))
2761 if (backend_fd >= 0)
2765 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2768 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
2771 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
2774 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
2777 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
2780 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
2783 for (i = NUMPRI; i--; )
2785 array_free (pending, [i]);
2787 array_free (idle, [i]);
2791 ev_free (anfds); anfds = 0; anfdmax = 0;
2793 /* have to use the microsoft-never-gets-it-right macro */
2794 array_free (rfeed, EMPTY);
2795 array_free (fdchange, EMPTY);
2796 array_free (timer, EMPTY);
2797 #if EV_PERIODIC_ENABLE
2798 array_free (periodic, EMPTY);
2801 array_free (fork, EMPTY);
2803 #if EV_CLEANUP_ENABLE
2804 array_free (cleanup, EMPTY);
2806 array_free (prepare, EMPTY);
2807 array_free (check, EMPTY);
2809 array_free (async, EMPTY);
2815 if (ev_is_default_loop (EV_A))
2817 ev_default_loop_ptr = 0;
2825 inline_size void infy_fork (EV_P);
2832 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
2835 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
2838 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
2844 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2845 if (ev_is_active (&pipe_w))
2847 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2850 ev_io_stop (EV_A_ &pipe_w);
2852 if (evpipe [0] >= 0)
2853 EV_WIN32_CLOSE_FD (evpipe [0]);
2856 /* iterate over everything, in case we missed something before */
2857 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2866 struct ev_loop * ecb_cold
2867 ev_loop_new (unsigned int flags) EV_THROW
2869 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2871 memset (EV_A, 0, sizeof (struct ev_loop));
2872 loop_init (EV_A_ flags);
2874 if (ev_backend (EV_A))
2881 #endif /* multiplicity */
2884 static void noinline ecb_cold
2885 verify_watcher (EV_P_ W w)
2887 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2890 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2893 static void noinline ecb_cold
2894 verify_heap (EV_P_ ANHE *heap, int N)
2898 for (i = HEAP0; i < N + HEAP0; ++i)
2900 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2901 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2902 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2904 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2908 static void noinline ecb_cold
2909 array_verify (EV_P_ W *ws, int cnt)
2913 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2914 verify_watcher (EV_A_ ws [cnt]);
2921 ev_verify (EV_P) EV_THROW
2927 assert (activecnt >= -1);
2929 assert (fdchangemax >= fdchangecnt);
2930 for (i = 0; i < fdchangecnt; ++i)
2931 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2933 assert (anfdmax >= 0);
2934 for (i = 0; i < anfdmax; ++i)
2938 for (w = w2 = anfds [i].head; w; w = w->next)
2940 verify_watcher (EV_A_ (W)w);
2944 assert (("libev: io watcher list contains a loop", w != w2));
2948 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2949 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2953 assert (timermax >= timercnt);
2954 verify_heap (EV_A_ timers, timercnt);
2956 #if EV_PERIODIC_ENABLE
2957 assert (periodicmax >= periodiccnt);
2958 verify_heap (EV_A_ periodics, periodiccnt);
2961 for (i = NUMPRI; i--; )
2963 assert (pendingmax [i] >= pendingcnt [i]);
2965 assert (idleall >= 0);
2966 assert (idlemax [i] >= idlecnt [i]);
2967 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2972 assert (forkmax >= forkcnt);
2973 array_verify (EV_A_ (W *)forks, forkcnt);
2976 #if EV_CLEANUP_ENABLE
2977 assert (cleanupmax >= cleanupcnt);
2978 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2982 assert (asyncmax >= asynccnt);
2983 array_verify (EV_A_ (W *)asyncs, asynccnt);
2986 #if EV_PREPARE_ENABLE
2987 assert (preparemax >= preparecnt);
2988 array_verify (EV_A_ (W *)prepares, preparecnt);
2992 assert (checkmax >= checkcnt);
2993 array_verify (EV_A_ (W *)checks, checkcnt);
2998 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2999 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3007 struct ev_loop * ecb_cold
3011 ev_default_loop (unsigned int flags) EV_THROW
3013 if (!ev_default_loop_ptr)
3016 EV_P = ev_default_loop_ptr = &default_loop_struct;
3018 ev_default_loop_ptr = 1;
3021 loop_init (EV_A_ flags);
3023 if (ev_backend (EV_A))
3026 ev_signal_init (&childev, childcb, SIGCHLD);
3027 ev_set_priority (&childev, EV_MAXPRI);
3028 ev_signal_start (EV_A_ &childev);
3029 ev_unref (EV_A); /* child watcher should not keep loop alive */
3033 ev_default_loop_ptr = 0;
3036 return ev_default_loop_ptr;
3040 ev_loop_fork (EV_P) EV_THROW
3045 /*****************************************************************************/
3048 ev_invoke (EV_P_ void *w, int revents)
3050 EV_CB_INVOKE ((W)w, revents);
3054 ev_pending_count (EV_P) EV_THROW
3057 unsigned int count = 0;
3059 for (pri = NUMPRI; pri--; )
3060 count += pendingcnt [pri];
3066 ev_invoke_pending (EV_P)
3068 pendingpri = NUMPRI;
3070 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3074 while (pendingcnt [pendingpri])
3076 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
3079 EV_CB_INVOKE (p->w, p->events);
3086 /* make idle watchers pending. this handles the "call-idle */
3087 /* only when higher priorities are idle" logic */
3091 if (expect_false (idleall))
3095 for (pri = NUMPRI; pri--; )
3097 if (pendingcnt [pri])
3102 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
3110 /* make timers pending */
3116 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
3120 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
3122 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
3124 /* first reschedule or stop timer */
3127 ev_at (w) += w->repeat;
3128 if (ev_at (w) < mn_now)
3131 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
3133 ANHE_at_cache (timers [HEAP0]);
3134 downheap (timers, timercnt, HEAP0);
3137 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
3140 feed_reverse (EV_A_ (W)w);
3142 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
3144 feed_reverse_done (EV_A_ EV_TIMER);
3148 #if EV_PERIODIC_ENABLE
3150 static void noinline
3151 periodic_recalc (EV_P_ ev_periodic *w)
3153 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3154 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3156 /* the above almost always errs on the low side */
3157 while (at <= ev_rt_now)
3159 ev_tstamp nat = at + w->interval;
3161 /* when resolution fails us, we use ev_rt_now */
3162 if (expect_false (nat == at))
3174 /* make periodics pending */
3176 periodics_reify (EV_P)
3180 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
3184 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
3186 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
3188 /* first reschedule or stop timer */
3189 if (w->reschedule_cb)
3191 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3193 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
3195 ANHE_at_cache (periodics [HEAP0]);
3196 downheap (periodics, periodiccnt, HEAP0);
3198 else if (w->interval)
3200 periodic_recalc (EV_A_ w);
3201 ANHE_at_cache (periodics [HEAP0]);
3202 downheap (periodics, periodiccnt, HEAP0);
3205 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
3208 feed_reverse (EV_A_ (W)w);
3210 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
3212 feed_reverse_done (EV_A_ EV_PERIODIC);
3216 /* simply recalculate all periodics */
3217 /* TODO: maybe ensure that at least one event happens when jumping forward? */
3218 static void noinline ecb_cold
3219 periodics_reschedule (EV_P)
3223 /* adjust periodics after time jump */
3224 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
3226 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
3228 if (w->reschedule_cb)
3229 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3230 else if (w->interval)
3231 periodic_recalc (EV_A_ w);
3233 ANHE_at_cache (periodics [i]);
3236 reheap (periodics, periodiccnt);
3240 /* adjust all timers by a given offset */
3241 static void noinline ecb_cold
3242 timers_reschedule (EV_P_ ev_tstamp adjust)
3246 for (i = 0; i < timercnt; ++i)
3248 ANHE *he = timers + i + HEAP0;
3249 ANHE_w (*he)->at += adjust;
3250 ANHE_at_cache (*he);
3254 /* fetch new monotonic and realtime times from the kernel */
3255 /* also detect if there was a timejump, and act accordingly */
3257 time_update (EV_P_ ev_tstamp max_block)
3259 #if EV_USE_MONOTONIC
3260 if (expect_true (have_monotonic))
3263 ev_tstamp odiff = rtmn_diff;
3265 mn_now = get_clock ();
3267 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
3268 /* interpolate in the meantime */
3269 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
3271 ev_rt_now = rtmn_diff + mn_now;
3276 ev_rt_now = ev_time ();
3278 /* loop a few times, before making important decisions.
3279 * on the choice of "4": one iteration isn't enough,
3280 * in case we get preempted during the calls to
3281 * ev_time and get_clock. a second call is almost guaranteed
3282 * to succeed in that case, though. and looping a few more times
3283 * doesn't hurt either as we only do this on time-jumps or
3284 * in the unlikely event of having been preempted here.
3289 rtmn_diff = ev_rt_now - mn_now;
3291 diff = odiff - rtmn_diff;
3293 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
3294 return; /* all is well */
3296 ev_rt_now = ev_time ();
3297 mn_now = get_clock ();
3301 /* no timer adjustment, as the monotonic clock doesn't jump */
3302 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
3303 # if EV_PERIODIC_ENABLE
3304 periodics_reschedule (EV_A);
3310 ev_rt_now = ev_time ();
3312 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
3314 /* adjust timers. this is easy, as the offset is the same for all of them */
3315 timers_reschedule (EV_A_ ev_rt_now - mn_now);
3316 #if EV_PERIODIC_ENABLE
3317 periodics_reschedule (EV_A);
3326 ev_run (EV_P_ int flags)
3332 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3334 loop_done = EVBREAK_CANCEL;
3336 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
3345 if (expect_false (curpid)) /* penalise the forking check even more */
3346 if (expect_false (getpid () != curpid))
3354 /* we might have forked, so queue fork handlers */
3355 if (expect_false (postfork))
3358 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
3363 #if EV_PREPARE_ENABLE
3364 /* queue prepare watchers (and execute them) */
3365 if (expect_false (preparecnt))
3367 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
3372 if (expect_false (loop_done))
3375 /* we might have forked, so reify kernel state if necessary */
3376 if (expect_false (postfork))
3379 /* update fd-related kernel structures */
3382 /* calculate blocking time */
3384 ev_tstamp waittime = 0.;
3385 ev_tstamp sleeptime = 0.;
3387 /* remember old timestamp for io_blocktime calculation */
3388 ev_tstamp prev_mn_now = mn_now;
3390 /* update time to cancel out callback processing overhead */
3391 time_update (EV_A_ 1e100);
3393 /* from now on, we want a pipe-wake-up */
3394 pipe_write_wanted = 1;
3396 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3398 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
3400 waittime = MAX_BLOCKTIME;
3404 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
3405 if (waittime > to) waittime = to;
3408 #if EV_PERIODIC_ENABLE
3411 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
3412 if (waittime > to) waittime = to;
3416 /* don't let timeouts decrease the waittime below timeout_blocktime */
3417 if (expect_false (waittime < timeout_blocktime))
3418 waittime = timeout_blocktime;
3420 /* at this point, we NEED to wait, so we have to ensure */
3421 /* to pass a minimum nonzero value to the backend */
3422 if (expect_false (waittime < backend_mintime))
3423 waittime = backend_mintime;
3425 /* extra check because io_blocktime is commonly 0 */
3426 if (expect_false (io_blocktime))
3428 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3430 if (sleeptime > waittime - backend_mintime)
3431 sleeptime = waittime - backend_mintime;
3433 if (expect_true (sleeptime > 0.))
3435 ev_sleep (sleeptime);
3436 waittime -= sleeptime;
3444 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
3445 backend_poll (EV_A_ waittime);
3446 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3448 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3450 ECB_MEMORY_FENCE_ACQUIRE;
3451 if (pipe_write_skipped)
3453 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3454 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3458 /* update ev_rt_now, do magic */
3459 time_update (EV_A_ waittime + sleeptime);
3462 /* queue pending timers and reschedule them */
3463 timers_reify (EV_A); /* relative timers called last */
3464 #if EV_PERIODIC_ENABLE
3465 periodics_reify (EV_A); /* absolute timers called first */
3469 /* queue idle watchers unless other events are pending */
3474 /* queue check watchers, to be executed first */
3475 if (expect_false (checkcnt))
3476 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3481 while (expect_true (
3484 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3487 if (loop_done == EVBREAK_ONE)
3488 loop_done = EVBREAK_CANCEL;
3498 ev_break (EV_P_ int how) EV_THROW
3504 ev_ref (EV_P) EV_THROW
3510 ev_unref (EV_P) EV_THROW
3516 ev_now_update (EV_P) EV_THROW
3518 time_update (EV_A_ 1e100);
3522 ev_suspend (EV_P) EV_THROW
3524 ev_now_update (EV_A);
3528 ev_resume (EV_P) EV_THROW
3530 ev_tstamp mn_prev = mn_now;
3532 ev_now_update (EV_A);
3533 timers_reschedule (EV_A_ mn_now - mn_prev);
3534 #if EV_PERIODIC_ENABLE
3535 /* TODO: really do this? */
3536 periodics_reschedule (EV_A);
3540 /*****************************************************************************/
3541 /* singly-linked list management, used when the expected list length is short */
3544 wlist_add (WL *head, WL elem)
3551 wlist_del (WL *head, WL elem)
3555 if (expect_true (*head == elem))
3561 head = &(*head)->next;
3565 /* internal, faster, version of ev_clear_pending */
3567 clear_pending (EV_P_ W w)
3571 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
3577 ev_clear_pending (EV_P_ void *w) EV_THROW
3580 int pending = w_->pending;
3582 if (expect_true (pending))
3584 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3585 p->w = (W)&pending_w;
3594 pri_adjust (EV_P_ W w)
3596 int pri = ev_priority (w);
3597 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3598 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3599 ev_set_priority (w, pri);
3603 ev_start (EV_P_ W w, int active)
3605 pri_adjust (EV_A_ w);
3617 /*****************************************************************************/
3620 ev_io_start (EV_P_ ev_io *w) EV_THROW
3624 if (expect_false (ev_is_active (w)))
3627 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3628 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3632 ev_start (EV_A_ (W)w, 1);
3633 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
3634 wlist_add (&anfds[fd].head, (WL)w);
3636 /* common bug, apparently */
3637 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3639 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3640 w->events &= ~EV__IOFDSET;
3646 ev_io_stop (EV_P_ ev_io *w) EV_THROW
3648 clear_pending (EV_A_ (W)w);
3649 if (expect_false (!ev_is_active (w)))
3652 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3656 wlist_del (&anfds[w->fd].head, (WL)w);
3657 ev_stop (EV_A_ (W)w);
3659 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3665 ev_timer_start (EV_P_ ev_timer *w) EV_THROW
3667 if (expect_false (ev_is_active (w)))
3670 ev_at (w) += mn_now;
3672 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
3677 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
3678 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
3679 ANHE_w (timers [ev_active (w)]) = (WT)w;
3680 ANHE_at_cache (timers [ev_active (w)]);
3681 upheap (timers, ev_active (w));
3685 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
3689 ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
3691 clear_pending (EV_A_ (W)w);
3692 if (expect_false (!ev_is_active (w)))
3698 int active = ev_active (w);
3700 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3704 if (expect_true (active < timercnt + HEAP0))
3706 timers [active] = timers [timercnt + HEAP0];
3707 adjustheap (timers, timercnt, active);
3711 ev_at (w) -= mn_now;
3713 ev_stop (EV_A_ (W)w);
3719 ev_timer_again (EV_P_ ev_timer *w) EV_THROW
3723 clear_pending (EV_A_ (W)w);
3725 if (ev_is_active (w))
3729 ev_at (w) = mn_now + w->repeat;
3730 ANHE_at_cache (timers [ev_active (w)]);
3731 adjustheap (timers, timercnt, ev_active (w));
3734 ev_timer_stop (EV_A_ w);
3738 ev_at (w) = w->repeat;
3739 ev_timer_start (EV_A_ w);
3746 ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3748 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3751 #if EV_PERIODIC_ENABLE
3753 ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
3755 if (expect_false (ev_is_active (w)))
3758 if (w->reschedule_cb)
3759 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3760 else if (w->interval)
3762 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
3763 periodic_recalc (EV_A_ w);
3766 ev_at (w) = w->offset;
3771 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
3772 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
3773 ANHE_w (periodics [ev_active (w)]) = (WT)w;
3774 ANHE_at_cache (periodics [ev_active (w)]);
3775 upheap (periodics, ev_active (w));
3779 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
3783 ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
3785 clear_pending (EV_A_ (W)w);
3786 if (expect_false (!ev_is_active (w)))
3792 int active = ev_active (w);
3794 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3798 if (expect_true (active < periodiccnt + HEAP0))
3800 periodics [active] = periodics [periodiccnt + HEAP0];
3801 adjustheap (periodics, periodiccnt, active);
3805 ev_stop (EV_A_ (W)w);
3811 ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
3813 /* TODO: use adjustheap and recalculation */
3814 ev_periodic_stop (EV_A_ w);
3815 ev_periodic_start (EV_A_ w);
3820 # define SA_RESTART 0
3823 #if EV_SIGNAL_ENABLE
3826 ev_signal_start (EV_P_ ev_signal *w) EV_THROW
3828 if (expect_false (ev_is_active (w)))
3831 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3834 assert (("libev: a signal must not be attached to two different loops",
3835 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3837 signals [w->signum - 1].loop = EV_A;
3838 ECB_MEMORY_FENCE_RELEASE;
3846 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3847 if (sigfd < 0 && errno == EINVAL)
3848 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3852 fd_intern (sigfd); /* doing it twice will not hurt */
3854 sigemptyset (&sigfd_set);
3856 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3857 ev_set_priority (&sigfd_w, EV_MAXPRI);
3858 ev_io_start (EV_A_ &sigfd_w);
3859 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3865 /* TODO: check .head */
3866 sigaddset (&sigfd_set, w->signum);
3867 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3869 signalfd (sigfd, &sigfd_set, 0);
3873 ev_start (EV_A_ (W)w, 1);
3874 wlist_add (&signals [w->signum - 1].head, (WL)w);
3877 # if EV_USE_SIGNALFD
3878 if (sigfd < 0) /*TODO*/
3884 signal (w->signum, ev_sighandler);
3886 struct sigaction sa;
3890 sa.sa_handler = ev_sighandler;
3891 sigfillset (&sa.sa_mask);
3892 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3893 sigaction (w->signum, &sa, 0);
3895 if (origflags & EVFLAG_NOSIGMASK)
3897 sigemptyset (&sa.sa_mask);
3898 sigaddset (&sa.sa_mask, w->signum);
3899 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3908 ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
3910 clear_pending (EV_A_ (W)w);
3911 if (expect_false (!ev_is_active (w)))
3916 wlist_del (&signals [w->signum - 1].head, (WL)w);
3917 ev_stop (EV_A_ (W)w);
3919 if (!signals [w->signum - 1].head)
3922 signals [w->signum - 1].loop = 0; /* unattach from signal */
3930 sigaddset (&ss, w->signum);
3931 sigdelset (&sigfd_set, w->signum);
3933 signalfd (sigfd, &sigfd_set, 0);
3934 sigprocmask (SIG_UNBLOCK, &ss, 0);
3938 signal (w->signum, SIG_DFL);
3949 ev_child_start (EV_P_ ev_child *w) EV_THROW
3952 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3954 if (expect_false (ev_is_active (w)))
3959 ev_start (EV_A_ (W)w, 1);
3960 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3966 ev_child_stop (EV_P_ ev_child *w) EV_THROW
3968 clear_pending (EV_A_ (W)w);
3969 if (expect_false (!ev_is_active (w)))
3974 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3975 ev_stop (EV_A_ (W)w);
3986 # define lstat(a,b) _stati64 (a,b)
3989 #define DEF_STAT_INTERVAL 5.0074891
3990 #define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3991 #define MIN_STAT_INTERVAL 0.1074891
3993 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3997 /* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3998 # define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
4000 static void noinline
4001 infy_add (EV_P_ ev_stat *w)
4003 w->wd = inotify_add_watch (fs_fd, w->path,
4004 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4005 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4006 | IN_DONT_FOLLOW | IN_MASK_ADD);
4012 /* now local changes will be tracked by inotify, but remote changes won't */
4013 /* unless the filesystem is known to be local, we therefore still poll */
4014 /* also do poll on <2.6.25, but with normal frequency */
4017 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4018 else if (!statfs (w->path, &sfs)
4019 && (sfs.f_type == 0x1373 /* devfs */
4020 || sfs.f_type == 0x4006 /* fat */
4021 || sfs.f_type == 0x4d44 /* msdos */
4022 || sfs.f_type == 0xEF53 /* ext2/3 */
4023 || sfs.f_type == 0x72b6 /* jffs2 */
4024 || sfs.f_type == 0x858458f6 /* ramfs */
4025 || sfs.f_type == 0x5346544e /* ntfs */
4026 || sfs.f_type == 0x3153464a /* jfs */
4027 || sfs.f_type == 0x9123683e /* btrfs */
4028 || sfs.f_type == 0x52654973 /* reiser3 */
4029 || sfs.f_type == 0x01021994 /* tmpfs */
4030 || sfs.f_type == 0x58465342 /* xfs */))
4031 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4033 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
4037 /* can't use inotify, continue to stat */
4038 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4040 /* if path is not there, monitor some parent directory for speedup hints */
4041 /* note that exceeding the hardcoded path limit is not a correctness issue, */
4042 /* but an efficiency issue only */
4043 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
4046 strcpy (path, w->path);
4050 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
4051 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
4053 char *pend = strrchr (path, '/');
4055 if (!pend || pend == path)
4059 w->wd = inotify_add_watch (fs_fd, path, mask);
4061 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
4066 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4068 /* now re-arm timer, if required */
4069 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4070 ev_timer_again (EV_A_ &w->timer);
4071 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4074 static void noinline
4075 infy_del (EV_P_ ev_stat *w)
4084 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
4085 wlist_del (&fs_hash [slot].head, (WL)w);
4087 /* remove this watcher, if others are watching it, they will rearm */
4088 inotify_rm_watch (fs_fd, wd);
4091 static void noinline
4092 infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
4095 /* overflow, need to check for all hash slots */
4096 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
4097 infy_wd (EV_A_ slot, wd, ev);
4102 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
4104 ev_stat *w = (ev_stat *)w_;
4105 w_ = w_->next; /* lets us remove this watcher and all before it */
4107 if (w->wd == wd || wd == -1)
4109 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
4111 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4113 infy_add (EV_A_ w); /* re-add, no matter what */
4116 stat_timer_cb (EV_A_ &w->timer, 0);
4123 infy_cb (EV_P_ ev_io *w, int revents)
4125 char buf [EV_INOTIFY_BUFSIZE];
4127 int len = read (fs_fd, buf, sizeof (buf));
4129 for (ofs = 0; ofs < len; )
4131 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
4132 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4133 ofs += sizeof (struct inotify_event) + ev->len;
4137 inline_size void ecb_cold
4138 ev_check_2625 (EV_P)
4140 /* kernels < 2.6.25 are borked
4141 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4143 if (ev_linux_version () < 0x020619)
4152 #if defined IN_CLOEXEC && defined IN_NONBLOCK
4153 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4157 return inotify_init ();
4168 ev_check_2625 (EV_A);
4170 fs_fd = infy_newfd ();
4175 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
4176 ev_set_priority (&fs_w, EV_MAXPRI);
4177 ev_io_start (EV_A_ &fs_w);
4191 ev_io_stop (EV_A_ &fs_w);
4193 fs_fd = infy_newfd ();
4198 ev_io_set (&fs_w, fs_fd, EV_READ);
4199 ev_io_start (EV_A_ &fs_w);
4203 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
4205 WL w_ = fs_hash [slot].head;
4206 fs_hash [slot].head = 0;
4210 ev_stat *w = (ev_stat *)w_;
4211 w_ = w_->next; /* lets us add this watcher */
4216 infy_add (EV_A_ w); /* re-add, no matter what */
4219 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4220 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4221 ev_timer_again (EV_A_ &w->timer);
4222 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4231 # define EV_LSTAT(p,b) _stati64 (p, b)
4233 # define EV_LSTAT(p,b) lstat (p, b)
4237 ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
4239 if (lstat (w->path, &w->attr) < 0)
4240 w->attr.st_nlink = 0;
4241 else if (!w->attr.st_nlink)
4242 w->attr.st_nlink = 1;
4245 static void noinline
4246 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
4248 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
4250 ev_statdata prev = w->attr;
4251 ev_stat_stat (EV_A_ w);
4253 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
4255 prev.st_dev != w->attr.st_dev
4256 || prev.st_ino != w->attr.st_ino
4257 || prev.st_mode != w->attr.st_mode
4258 || prev.st_nlink != w->attr.st_nlink
4259 || prev.st_uid != w->attr.st_uid
4260 || prev.st_gid != w->attr.st_gid
4261 || prev.st_rdev != w->attr.st_rdev
4262 || prev.st_size != w->attr.st_size
4263 || prev.st_atime != w->attr.st_atime
4264 || prev.st_mtime != w->attr.st_mtime
4265 || prev.st_ctime != w->attr.st_ctime
4267 /* we only update w->prev on actual differences */
4268 /* in case we test more often than invoke the callback, */
4269 /* to ensure that prev is always different to attr */
4277 ev_stat_stat (EV_A_ w); /* avoid race... */
4281 ev_feed_event (EV_A_ w, EV_STAT);
4286 ev_stat_start (EV_P_ ev_stat *w) EV_THROW
4288 if (expect_false (ev_is_active (w)))
4291 ev_stat_stat (EV_A_ w);
4293 if (w->interval < MIN_STAT_INTERVAL && w->interval)
4294 w->interval = MIN_STAT_INTERVAL;
4296 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
4297 ev_set_priority (&w->timer, ev_priority (w));
4307 ev_timer_again (EV_A_ &w->timer);
4311 ev_start (EV_A_ (W)w, 1);
4317 ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
4319 clear_pending (EV_A_ (W)w);
4320 if (expect_false (!ev_is_active (w)))
4329 if (ev_is_active (&w->timer))
4332 ev_timer_stop (EV_A_ &w->timer);
4335 ev_stop (EV_A_ (W)w);
4343 ev_idle_start (EV_P_ ev_idle *w) EV_THROW
4345 if (expect_false (ev_is_active (w)))
4348 pri_adjust (EV_A_ (W)w);
4353 int active = ++idlecnt [ABSPRI (w)];
4356 ev_start (EV_A_ (W)w, active);
4358 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
4359 idles [ABSPRI (w)][active - 1] = w;
4366 ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
4368 clear_pending (EV_A_ (W)w);
4369 if (expect_false (!ev_is_active (w)))
4375 int active = ev_active (w);
4377 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
4378 ev_active (idles [ABSPRI (w)][active - 1]) = active;
4380 ev_stop (EV_A_ (W)w);
4388 #if EV_PREPARE_ENABLE
4390 ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
4392 if (expect_false (ev_is_active (w)))
4397 ev_start (EV_A_ (W)w, ++preparecnt);
4398 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
4399 prepares [preparecnt - 1] = w;
4405 ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
4407 clear_pending (EV_A_ (W)w);
4408 if (expect_false (!ev_is_active (w)))
4414 int active = ev_active (w);
4416 prepares [active - 1] = prepares [--preparecnt];
4417 ev_active (prepares [active - 1]) = active;
4420 ev_stop (EV_A_ (W)w);
4428 ev_check_start (EV_P_ ev_check *w) EV_THROW
4430 if (expect_false (ev_is_active (w)))
4435 ev_start (EV_A_ (W)w, ++checkcnt);
4436 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
4437 checks [checkcnt - 1] = w;
4443 ev_check_stop (EV_P_ ev_check *w) EV_THROW
4445 clear_pending (EV_A_ (W)w);
4446 if (expect_false (!ev_is_active (w)))
4452 int active = ev_active (w);
4454 checks [active - 1] = checks [--checkcnt];
4455 ev_active (checks [active - 1]) = active;
4458 ev_stop (EV_A_ (W)w);
4466 ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
4468 ev_run (w->other, EVRUN_NOWAIT);
4472 embed_io_cb (EV_P_ ev_io *io, int revents)
4474 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
4477 ev_feed_event (EV_A_ (W)w, EV_EMBED);
4479 ev_run (w->other, EVRUN_NOWAIT);
4483 embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4485 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4493 ev_run (EV_A_ EVRUN_NOWAIT);
4499 embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4501 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4503 ev_embed_stop (EV_A_ w);
4508 ev_loop_fork (EV_A);
4509 ev_run (EV_A_ EVRUN_NOWAIT);
4512 ev_embed_start (EV_A_ w);
4517 embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4519 ev_idle_stop (EV_A_ idle);
4524 ev_embed_start (EV_P_ ev_embed *w) EV_THROW
4526 if (expect_false (ev_is_active (w)))
4531 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4532 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4537 ev_set_priority (&w->io, ev_priority (w));
4538 ev_io_start (EV_A_ &w->io);
4540 ev_prepare_init (&w->prepare, embed_prepare_cb);
4541 ev_set_priority (&w->prepare, EV_MINPRI);
4542 ev_prepare_start (EV_A_ &w->prepare);
4544 ev_fork_init (&w->fork, embed_fork_cb);
4545 ev_fork_start (EV_A_ &w->fork);
4547 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4549 ev_start (EV_A_ (W)w, 1);
4555 ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
4557 clear_pending (EV_A_ (W)w);
4558 if (expect_false (!ev_is_active (w)))
4563 ev_io_stop (EV_A_ &w->io);
4564 ev_prepare_stop (EV_A_ &w->prepare);
4565 ev_fork_stop (EV_A_ &w->fork);
4567 ev_stop (EV_A_ (W)w);
4575 ev_fork_start (EV_P_ ev_fork *w) EV_THROW
4577 if (expect_false (ev_is_active (w)))
4582 ev_start (EV_A_ (W)w, ++forkcnt);
4583 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4584 forks [forkcnt - 1] = w;
4590 ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
4592 clear_pending (EV_A_ (W)w);
4593 if (expect_false (!ev_is_active (w)))
4599 int active = ev_active (w);
4601 forks [active - 1] = forks [--forkcnt];
4602 ev_active (forks [active - 1]) = active;
4605 ev_stop (EV_A_ (W)w);
4611 #if EV_CLEANUP_ENABLE
4613 ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4615 if (expect_false (ev_is_active (w)))
4620 ev_start (EV_A_ (W)w, ++cleanupcnt);
4621 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4622 cleanups [cleanupcnt - 1] = w;
4624 /* cleanup watchers should never keep a refcount on the loop */
4630 ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4632 clear_pending (EV_A_ (W)w);
4633 if (expect_false (!ev_is_active (w)))
4640 int active = ev_active (w);
4642 cleanups [active - 1] = cleanups [--cleanupcnt];
4643 ev_active (cleanups [active - 1]) = active;
4646 ev_stop (EV_A_ (W)w);
4654 ev_async_start (EV_P_ ev_async *w) EV_THROW
4656 if (expect_false (ev_is_active (w)))
4665 ev_start (EV_A_ (W)w, ++asynccnt);
4666 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4667 asyncs [asynccnt - 1] = w;
4673 ev_async_stop (EV_P_ ev_async *w) EV_THROW
4675 clear_pending (EV_A_ (W)w);
4676 if (expect_false (!ev_is_active (w)))
4682 int active = ev_active (w);
4684 asyncs [active - 1] = asyncs [--asynccnt];
4685 ev_active (asyncs [active - 1]) = active;
4688 ev_stop (EV_A_ (W)w);
4694 ev_async_send (EV_P_ ev_async *w) EV_THROW
4697 evpipe_write (EV_A_ &async_pending);
4701 /*****************************************************************************/
4707 void (*cb)(int revents, void *arg);
4712 once_cb (EV_P_ struct ev_once *once, int revents)
4714 void (*cb)(int revents, void *arg) = once->cb;
4715 void *arg = once->arg;
4717 ev_io_stop (EV_A_ &once->io);
4718 ev_timer_stop (EV_A_ &once->to);
4725 once_cb_io (EV_P_ ev_io *w, int revents)
4727 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4729 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
4733 once_cb_to (EV_P_ ev_timer *w, int revents)
4735 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4737 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
4741 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
4743 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
4745 if (expect_false (!once))
4747 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
4754 ev_init (&once->io, once_cb_io);
4757 ev_io_set (&once->io, fd, events);
4758 ev_io_start (EV_A_ &once->io);
4761 ev_init (&once->to, once_cb_to);
4764 ev_timer_set (&once->to, timeout, 0.);
4765 ev_timer_start (EV_A_ &once->to);
4769 /*****************************************************************************/
4773 ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4776 ev_watcher_list *wl, *wn;
4778 if (types & (EV_IO | EV_EMBED))
4779 for (i = 0; i < anfdmax; ++i)
4780 for (wl = anfds [i].head; wl; )
4785 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4787 if (types & EV_EMBED)
4788 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4793 if (ev_cb ((ev_io *)wl) == infy_cb)
4797 if ((ev_io *)wl != &pipe_w)
4799 cb (EV_A_ EV_IO, wl);
4804 if (types & (EV_TIMER | EV_STAT))
4805 for (i = timercnt + HEAP0; i-- > HEAP0; )
4807 /*TODO: timer is not always active*/
4808 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4810 if (types & EV_STAT)
4811 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4815 if (types & EV_TIMER)
4816 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4818 #if EV_PERIODIC_ENABLE
4819 if (types & EV_PERIODIC)
4820 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4821 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4825 if (types & EV_IDLE)
4826 for (j = NUMPRI; j--; )
4827 for (i = idlecnt [j]; i--; )
4828 cb (EV_A_ EV_IDLE, idles [j][i]);
4832 if (types & EV_FORK)
4833 for (i = forkcnt; i--; )
4834 if (ev_cb (forks [i]) != embed_fork_cb)
4835 cb (EV_A_ EV_FORK, forks [i]);
4839 if (types & EV_ASYNC)
4840 for (i = asynccnt; i--; )
4841 cb (EV_A_ EV_ASYNC, asyncs [i]);
4844 #if EV_PREPARE_ENABLE
4845 if (types & EV_PREPARE)
4846 for (i = preparecnt; i--; )
4847 # if EV_EMBED_ENABLE
4848 if (ev_cb (prepares [i]) != embed_prepare_cb)
4850 cb (EV_A_ EV_PREPARE, prepares [i]);
4854 if (types & EV_CHECK)
4855 for (i = checkcnt; i--; )
4856 cb (EV_A_ EV_CHECK, checks [i]);
4859 #if EV_SIGNAL_ENABLE
4860 if (types & EV_SIGNAL)
4861 for (i = 0; i < EV_NSIG - 1; ++i)
4862 for (wl = signals [i].head; wl; )
4865 cb (EV_A_ EV_SIGNAL, wl);
4871 if (types & EV_CHILD)
4872 for (i = (EV_PID_HASHSIZE); i--; )
4873 for (wl = childs [i]; wl; )
4876 cb (EV_A_ EV_CHILD, wl);
4880 /* EV_STAT 0x00001000 /* stat data changed */
4881 /* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4886 #include "ev_wrap.h"