2 * libev event processing core, watcher management
4 * Copyright (c) 2007,2008,2009,2010,2011,2012 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 # error "unable to find value for NSIG, please report"
247 /* to make it compile regardless, just remove the above line, */
248 /* but consider reporting it, too! :) */
253 # define EV_USE_FLOOR 0
256 #ifndef EV_USE_CLOCK_SYSCALL
257 # if __linux && __GLIBC__ >= 2
258 # define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
260 # define EV_USE_CLOCK_SYSCALL 0
264 #ifndef EV_USE_MONOTONIC
265 # if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
266 # define EV_USE_MONOTONIC EV_FEATURE_OS
268 # define EV_USE_MONOTONIC 0
272 #ifndef EV_USE_REALTIME
273 # define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
276 #ifndef EV_USE_NANOSLEEP
277 # if _POSIX_C_SOURCE >= 199309L
278 # define EV_USE_NANOSLEEP EV_FEATURE_OS
280 # define EV_USE_NANOSLEEP 0
284 #ifndef EV_USE_SELECT
285 # define EV_USE_SELECT EV_FEATURE_BACKENDS
290 # define EV_USE_POLL 0
292 # define EV_USE_POLL EV_FEATURE_BACKENDS
297 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
298 # define EV_USE_EPOLL EV_FEATURE_BACKENDS
300 # define EV_USE_EPOLL 0
304 #ifndef EV_USE_KQUEUE
305 # define EV_USE_KQUEUE 0
309 # define EV_USE_PORT 0
312 #ifndef EV_USE_INOTIFY
313 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
314 # define EV_USE_INOTIFY EV_FEATURE_OS
316 # define EV_USE_INOTIFY 0
320 #ifndef EV_PID_HASHSIZE
321 # define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
324 #ifndef EV_INOTIFY_HASHSIZE
325 # define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
328 #ifndef EV_USE_EVENTFD
329 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
330 # define EV_USE_EVENTFD EV_FEATURE_OS
332 # define EV_USE_EVENTFD 0
336 #ifndef EV_USE_SIGNALFD
337 # if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
338 # define EV_USE_SIGNALFD EV_FEATURE_OS
340 # define EV_USE_SIGNALFD 0
344 #if 0 /* debugging */
346 # define EV_USE_4HEAP 1
347 # define EV_HEAP_CACHE_AT 1
351 # define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
355 # define EV_USE_4HEAP EV_FEATURE_DATA
358 #ifndef EV_HEAP_CACHE_AT
359 # define EV_HEAP_CACHE_AT EV_FEATURE_DATA
363 /* supposedly, android doesn't typedef fd_mask */
364 # undef EV_USE_SELECT
365 # define EV_USE_SELECT 0
366 /* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
367 # undef EV_USE_CLOCK_SYSCALL
368 # define EV_USE_CLOCK_SYSCALL 0
371 /* aix's poll.h seems to cause lots of trouble */
373 /* AIX has a completely broken poll.h header */
375 # define EV_USE_POLL 0
378 /* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
379 /* which makes programs even slower. might work on other unices, too. */
380 #if EV_USE_CLOCK_SYSCALL
381 # include <sys/syscall.h>
382 # ifdef SYS_clock_gettime
383 # define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
384 # undef EV_USE_MONOTONIC
385 # define EV_USE_MONOTONIC 1
387 # undef EV_USE_CLOCK_SYSCALL
388 # define EV_USE_CLOCK_SYSCALL 0
392 /* this block fixes any misconfiguration where we know we run into trouble otherwise */
394 #ifndef CLOCK_MONOTONIC
395 # undef EV_USE_MONOTONIC
396 # define EV_USE_MONOTONIC 0
399 #ifndef CLOCK_REALTIME
400 # undef EV_USE_REALTIME
401 # define EV_USE_REALTIME 0
405 # undef EV_USE_INOTIFY
406 # define EV_USE_INOTIFY 0
409 #if !EV_USE_NANOSLEEP
410 /* hp-ux has it in sys/time.h, which we unconditionally include above */
411 # if !defined _WIN32 && !defined __hpux
412 # include <sys/select.h>
417 # include <sys/statfs.h>
418 # include <sys/inotify.h>
419 /* some very old inotify.h headers don't have IN_DONT_FOLLOW */
420 # ifndef IN_DONT_FOLLOW
421 # undef EV_USE_INOTIFY
422 # define EV_USE_INOTIFY 0
427 /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
429 # ifndef EFD_NONBLOCK
430 # define EFD_NONBLOCK O_NONBLOCK
434 # define EFD_CLOEXEC O_CLOEXEC
436 # define EFD_CLOEXEC 02000000
439 EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
443 /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
445 # ifndef SFD_NONBLOCK
446 # define SFD_NONBLOCK O_NONBLOCK
450 # define SFD_CLOEXEC O_CLOEXEC
452 # define SFD_CLOEXEC 02000000
455 EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
457 struct signalfd_siginfo
460 char pad[128 - sizeof (uint32_t)];
467 # define EV_FREQUENT_CHECK ev_verify (EV_A)
469 # define EV_FREQUENT_CHECK do { } while (0)
473 * This is used to work around floating point rounding problems.
474 * This value is good at least till the year 4000.
476 #define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
477 /*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
479 #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
480 #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
482 #define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
483 #define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
485 /* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
488 * libecb - http://software.schmorp.de/pkg/libecb
490 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
491 * Copyright (©) 2011 Emanuele Giaquinta
492 * All rights reserved.
494 * Redistribution and use in source and binary forms, with or without modifica-
495 * tion, are permitted provided that the following conditions are met:
497 * 1. Redistributions of source code must retain the above copyright notice,
498 * this list of conditions and the following disclaimer.
500 * 2. Redistributions in binary form must reproduce the above copyright
501 * notice, this list of conditions and the following disclaimer in the
502 * documentation and/or other materials provided with the distribution.
504 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
505 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
506 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
507 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
508 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
509 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
510 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
511 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
512 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
513 * OF THE POSSIBILITY OF SUCH DAMAGE.
519 /* 16 bits major, 16 bits minor */
520 #define ECB_VERSION 0x00010003
523 typedef signed char int8_t;
524 typedef unsigned char uint8_t;
525 typedef signed short int16_t;
526 typedef unsigned short uint16_t;
527 typedef signed int int32_t;
528 typedef unsigned int uint32_t;
530 typedef signed long long int64_t;
531 typedef unsigned long long uint64_t;
532 #else /* _MSC_VER || __BORLANDC__ */
533 typedef signed __int64 int64_t;
534 typedef unsigned __int64 uint64_t;
537 #define ECB_PTRSIZE 8
538 typedef uint64_t uintptr_t;
539 typedef int64_t intptr_t;
541 #define ECB_PTRSIZE 4
542 typedef uint32_t uintptr_t;
543 typedef int32_t intptr_t;
546 #include <inttypes.h>
547 #if UINTMAX_MAX > 0xffffffffU
548 #define ECB_PTRSIZE 8
550 #define ECB_PTRSIZE 4
554 /* work around x32 idiocy by defining proper macros */
555 #if __x86_64 || _M_AMD64
557 #define ECB_AMD64_X32 1
563 /* many compilers define _GNUC_ to some versions but then only implement
564 * what their idiot authors think are the "more important" extensions,
565 * causing enormous grief in return for some better fake benchmark numbers.
567 * we try to detect these and simply assume they are not gcc - if they have
568 * an issue with that they should have done it right in the first place.
570 #ifndef ECB_GCC_VERSION
571 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
572 #define ECB_GCC_VERSION(major,minor) 0
574 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
578 #define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
579 #define ECB_C99 (__STDC_VERSION__ >= 199901L)
580 #define ECB_C11 (__STDC_VERSION__ >= 201112L)
581 #define ECB_CPP (__cplusplus+0)
582 #define ECB_CPP11 (__cplusplus >= 201103L)
585 #define ECB_EXTERN_C extern "C"
586 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
587 #define ECB_EXTERN_C_END }
589 #define ECB_EXTERN_C extern
590 #define ECB_EXTERN_C_BEG
591 #define ECB_EXTERN_C_END
594 /*****************************************************************************/
596 /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
597 /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
604 #define ECB_MEMORY_FENCE do { } while (0)
607 #ifndef ECB_MEMORY_FENCE
608 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
609 #if __i386 || __i386__
610 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
611 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
612 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
613 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
614 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
615 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
616 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
617 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
618 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
619 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
620 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
621 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
622 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
623 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
624 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
625 #elif __sparc || __sparc__
626 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
627 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
628 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
629 #elif defined __s390__ || defined __s390x__
630 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
631 #elif defined __mips__
632 /* GNU/Linux emulates sync on mips1 architectures, so we force it's use */
633 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
634 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
635 #elif defined __alpha__
636 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
637 #elif defined __hppa__
638 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
639 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
640 #elif defined __ia64__
641 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
646 #ifndef ECB_MEMORY_FENCE
647 #if ECB_GCC_VERSION(4,7)
648 /* see comment below (stdatomic.h) about the C11 memory model. */
649 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
651 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
652 * without risking compile time errors with other compilers. We *could*
653 * define our own ecb_clang_has_feature, but I just can't be bothered to work
654 * around this shit time and again.
655 * #elif defined __clang && __has_feature (cxx_atomic)
656 * // see comment below (stdatomic.h) about the C11 memory model.
657 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
660 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
661 #define ECB_MEMORY_FENCE __sync_synchronize ()
662 #elif _MSC_VER >= 1400 /* VC++ 2005 */
663 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
664 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
665 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
666 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
669 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
670 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
671 #include <mbarrier.h>
672 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
673 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
674 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
676 #define ECB_MEMORY_FENCE __sync ()
680 #ifndef ECB_MEMORY_FENCE
681 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
682 /* we assume that these memory fences work on all variables/all memory accesses, */
683 /* not just C11 atomics and atomic accesses */
684 #include <stdatomic.h>
685 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
686 /* any fence other than seq_cst, which isn't very efficient for us. */
687 /* Why that is, we don't know - either the C11 memory model is quite useless */
688 /* for most usages, or gcc and clang have a bug */
689 /* I *currently* lean towards the latter, and inefficiently implement */
690 /* all three of ecb's fences as a seq_cst fence */
691 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
695 #ifndef ECB_MEMORY_FENCE
696 #if !ECB_AVOID_PTHREADS
698 * if you get undefined symbol references to pthread_mutex_lock,
699 * or failure to find pthread.h, then you should implement
700 * the ECB_MEMORY_FENCE operations for your cpu/compiler
701 * OR provide pthread.h and link against the posix thread library
705 #define ECB_NEEDS_PTHREADS 1
706 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
708 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
709 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
713 #if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
714 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
717 #if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
718 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
721 /*****************************************************************************/
724 #define ecb_inline static inline
725 #elif ECB_GCC_VERSION(2,5)
726 #define ecb_inline static __inline__
728 #define ecb_inline static inline
730 #define ecb_inline static
733 #if ECB_GCC_VERSION(3,3)
734 #define ecb_restrict __restrict__
736 #define ecb_restrict restrict
741 typedef int ecb_bool;
743 #define ECB_CONCAT_(a, b) a ## b
744 #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
745 #define ECB_STRINGIFY_(a) # a
746 #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
748 #define ecb_function_ ecb_inline
750 #if ECB_GCC_VERSION(3,1)
751 #define ecb_attribute(attrlist) __attribute__(attrlist)
752 #define ecb_is_constant(expr) __builtin_constant_p (expr)
753 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
754 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
756 #define ecb_attribute(attrlist)
757 #define ecb_is_constant(expr) 0
758 #define ecb_expect(expr,value) (expr)
759 #define ecb_prefetch(addr,rw,locality)
762 /* no emulation for ecb_decltype */
763 #if ECB_GCC_VERSION(4,5)
764 #define ecb_decltype(x) __decltype(x)
765 #elif ECB_GCC_VERSION(3,0)
766 #define ecb_decltype(x) __typeof(x)
769 #define ecb_noinline ecb_attribute ((__noinline__))
770 #define ecb_unused ecb_attribute ((__unused__))
771 #define ecb_const ecb_attribute ((__const__))
772 #define ecb_pure ecb_attribute ((__pure__))
775 #define ecb_noreturn _Noreturn
777 #define ecb_noreturn ecb_attribute ((__noreturn__))
780 #if ECB_GCC_VERSION(4,3)
781 #define ecb_artificial ecb_attribute ((__artificial__))
782 #define ecb_hot ecb_attribute ((__hot__))
783 #define ecb_cold ecb_attribute ((__cold__))
785 #define ecb_artificial
790 /* put around conditional expressions if you are very sure that the */
791 /* expression is mostly true or mostly false. note that these return */
792 /* booleans, not the expression. */
793 #define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
794 #define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
795 /* for compatibility to the rest of the world */
796 #define ecb_likely(expr) ecb_expect_true (expr)
797 #define ecb_unlikely(expr) ecb_expect_false (expr)
799 /* count trailing zero bits and count # of one bits */
800 #if ECB_GCC_VERSION(3,4)
801 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
802 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
803 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
804 #define ecb_ctz32(x) __builtin_ctz (x)
805 #define ecb_ctz64(x) __builtin_ctzll (x)
806 #define ecb_popcount32(x) __builtin_popcount (x)
809 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
811 ecb_ctz32 (uint32_t x)
815 x &= ~x + 1; /* this isolates the lowest bit */
817 #if ECB_branchless_on_i386
818 r += !!(x & 0xaaaaaaaa) << 0;
819 r += !!(x & 0xcccccccc) << 1;
820 r += !!(x & 0xf0f0f0f0) << 2;
821 r += !!(x & 0xff00ff00) << 3;
822 r += !!(x & 0xffff0000) << 4;
824 if (x & 0xaaaaaaaa) r += 1;
825 if (x & 0xcccccccc) r += 2;
826 if (x & 0xf0f0f0f0) r += 4;
827 if (x & 0xff00ff00) r += 8;
828 if (x & 0xffff0000) r += 16;
834 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
836 ecb_ctz64 (uint64_t x)
838 int shift = x & 0xffffffffU ? 0 : 32;
839 return ecb_ctz32 (x >> shift) + shift;
842 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
844 ecb_popcount32 (uint32_t x)
846 x -= (x >> 1) & 0x55555555;
847 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
848 x = ((x >> 4) + x) & 0x0f0f0f0f;
854 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
855 ecb_function_ int ecb_ld32 (uint32_t x)
859 if (x >> 16) { x >>= 16; r += 16; }
860 if (x >> 8) { x >>= 8; r += 8; }
861 if (x >> 4) { x >>= 4; r += 4; }
862 if (x >> 2) { x >>= 2; r += 2; }
863 if (x >> 1) { r += 1; }
868 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
869 ecb_function_ int ecb_ld64 (uint64_t x)
873 if (x >> 32) { x >>= 32; r += 32; }
875 return r + ecb_ld32 (x);
879 ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
880 ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
881 ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
882 ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
884 ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
885 ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
887 return ( (x * 0x0802U & 0x22110U)
888 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
891 ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
892 ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
894 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
895 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
896 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
897 x = ( x >> 8 ) | ( x << 8);
902 ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
903 ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
905 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
906 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
907 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
908 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
909 x = ( x >> 16 ) | ( x << 16);
914 /* popcount64 is only available on 64 bit cpus as gcc builtin */
915 /* so for this version we are lazy */
916 ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
918 ecb_popcount64 (uint64_t x)
920 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
923 ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
924 ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
925 ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
926 ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
927 ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
928 ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
929 ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
930 ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
932 ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
933 ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
934 ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
935 ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
936 ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
937 ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
938 ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
939 ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
941 #if ECB_GCC_VERSION(4,3)
942 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
943 #define ecb_bswap32(x) __builtin_bswap32 (x)
944 #define ecb_bswap64(x) __builtin_bswap64 (x)
946 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
947 ecb_function_ uint16_t
948 ecb_bswap16 (uint16_t x)
950 return ecb_rotl16 (x, 8);
953 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
954 ecb_function_ uint32_t
955 ecb_bswap32 (uint32_t x)
957 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
960 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
961 ecb_function_ uint64_t
962 ecb_bswap64 (uint64_t x)
964 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
968 #if ECB_GCC_VERSION(4,5)
969 #define ecb_unreachable() __builtin_unreachable ()
971 /* this seems to work fine, but gcc always emits a warning for it :/ */
972 ecb_inline void ecb_unreachable (void) ecb_noreturn;
973 ecb_inline void ecb_unreachable (void) { }
976 /* try to tell the compiler that some condition is definitely true */
977 #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
979 ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
980 ecb_inline unsigned char
981 ecb_byteorder_helper (void)
983 /* the union code still generates code under pressure in gcc, */
984 /* but less than using pointers, and always seems to */
985 /* successfully return a constant. */
986 /* the reason why we have this horrible preprocessor mess */
987 /* is to avoid it in all cases, at least on common architectures */
988 /* or when using a recent enough gcc version (>= 4.6) */
989 #if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
991 #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
993 #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
1000 } u = { 0x11223344 };
1005 ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
1006 ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
1007 ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
1008 ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
1010 #if ECB_GCC_VERSION(3,0) || ECB_C99
1011 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1013 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1017 template<typename T>
1018 static inline T ecb_div_rd (T val, T div)
1020 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1022 template<typename T>
1023 static inline T ecb_div_ru (T val, T div)
1025 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1028 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1029 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1032 #if ecb_cplusplus_does_not_suck
1033 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1034 template<typename T, int N>
1035 static inline int ecb_array_length (const T (&arr)[N])
1040 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1043 /*******************************************************************************/
1044 /* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1046 /* basically, everything uses "ieee pure-endian" floating point numbers */
1047 /* the only noteworthy exception is ancient armle, which uses order 43218765 */
1049 || __i386 || __i386__ \
1050 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1051 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1052 || defined __arm__ && defined __ARM_EABI__ \
1053 || defined __s390__ || defined __s390x__ \
1054 || defined __mips__ \
1055 || defined __alpha__ \
1056 || defined __hppa__ \
1057 || defined __ia64__ \
1058 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64
1060 #include <string.h> /* for memcpy */
1063 #include <math.h> /* for frexp*, ldexp* */
1068 /* convert a float to ieee single/binary32 */
1069 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1070 ecb_function_ uint32_t
1071 ecb_float_to_binary32 (float x)
1078 /* slow emulation, works for anything but -0 */
1082 if (x == 0e0f ) return 0x00000000U;
1083 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1084 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1085 if (x != x ) return 0x7fbfffffU;
1087 m = frexpf (x, &e) * 0x1000000U;
1089 r = m & 0x80000000U;
1101 r |= (e + 126) << 23;
1108 /* converts an ieee single/binary32 to a float */
1109 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1111 ecb_binary32_to_float (uint32_t x)
1118 /* emulation, only works for normals and subnormals and +0 */
1120 int e = (x >> 23) & 0xffU;
1129 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1130 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1138 /* convert a double to ieee double/binary64 */
1139 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1140 ecb_function_ uint64_t
1141 ecb_double_to_binary64 (double x)
1148 /* slow emulation, works for anything but -0 */
1152 if (x == 0e0 ) return 0x0000000000000000U;
1153 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1154 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1155 if (x != x ) return 0X7ff7ffffffffffffU;
1157 m = frexp (x, &e) * 0x20000000000000U;
1159 r = m & 0x8000000000000000;;
1166 m &= 0x1fffffffffffffU;
1171 r |= ((uint64_t)(e + 1022)) << 52;
1172 r |= m & 0xfffffffffffffU;
1178 /* converts an ieee double/binary64 to a double */
1179 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1180 ecb_function_ double
1181 ecb_binary64_to_double (uint64_t x)
1188 /* emulation, only works for normals and subnormals and +0 */
1190 int e = (x >> 52) & 0x7ffU;
1192 x &= 0xfffffffffffffU;
1195 x |= 0x10000000000000U;
1199 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1200 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1214 #if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1215 /* if your architecture doesn't need memory fences, e.g. because it is
1216 * single-cpu/core, or if you use libev in a project that doesn't use libev
1217 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1218 * libev, in which cases the memory fences become nops.
1219 * alternatively, you can remove this #error and link against libpthread,
1220 * which will then provide the memory fences.
1222 # error "memory fences not defined for your architecture, please report"
1225 #ifndef ECB_MEMORY_FENCE
1226 # define ECB_MEMORY_FENCE do { } while (0)
1227 # define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1228 # define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1231 #define expect_false(cond) ecb_expect_false (cond)
1232 #define expect_true(cond) ecb_expect_true (cond)
1233 #define noinline ecb_noinline
1235 #define inline_size ecb_inline
1238 # define inline_speed ecb_inline
1240 # define inline_speed static noinline
1243 #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1245 #if EV_MINPRI == EV_MAXPRI
1246 # define ABSPRI(w) (((W)w), 0)
1248 # define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1251 #define EMPTY /* required for microsofts broken pseudo-c compiler */
1252 #define EMPTY2(a,b) /* used to suppress some warnings */
1254 typedef ev_watcher *W;
1255 typedef ev_watcher_list *WL;
1256 typedef ev_watcher_time *WT;
1258 #define ev_active(w) ((W)(w))->active
1259 #define ev_at(w) ((WT)(w))->at
1262 /* sig_atomic_t is used to avoid per-thread variables or locking but still */
1263 /* giving it a reasonably high chance of working on typical architectures */
1264 static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1267 #if EV_USE_MONOTONIC
1268 static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1271 #ifndef EV_FD_TO_WIN32_HANDLE
1272 # define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1274 #ifndef EV_WIN32_HANDLE_TO_FD
1275 # define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1277 #ifndef EV_WIN32_CLOSE_FD
1278 # define EV_WIN32_CLOSE_FD(fd) close (fd)
1282 # include "ev_win32.c"
1285 /*****************************************************************************/
1287 /* define a suitable floor function (only used by periodics atm) */
1291 # define ev_floor(v) floor (v)
1296 /* a floor() replacement function, should be independent of ev_tstamp type */
1297 static ev_tstamp noinline
1298 ev_floor (ev_tstamp v)
1300 /* the choice of shift factor is not terribly important */
1301 #if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1302 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1304 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1307 /* argument too large for an unsigned long? */
1308 if (expect_false (v >= shift))
1313 return v; /* very large number */
1315 f = shift * ev_floor (v * (1. / shift));
1316 return f + ev_floor (v - f);
1319 /* special treatment for negative args? */
1320 if (expect_false (v < 0.))
1322 ev_tstamp f = -ev_floor (-v);
1324 return f - (f == v ? 0 : 1);
1327 /* fits into an unsigned long */
1328 return (unsigned long)v;
1333 /*****************************************************************************/
1336 # include <sys/utsname.h>
1339 static unsigned int noinline ecb_cold
1340 ev_linux_version (void)
1346 char *p = buf.release;
1351 for (i = 3+1; --i; )
1357 if (*p >= '0' && *p <= '9')
1358 c = c * 10 + *p++ - '0';
1375 /*****************************************************************************/
1378 static void noinline ecb_cold
1379 ev_printerr (const char *msg)
1381 write (STDERR_FILENO, msg, strlen (msg));
1385 static void (*syserr_cb)(const char *msg) EV_THROW;
1388 ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
1393 static void noinline ecb_cold
1394 ev_syserr (const char *msg)
1397 msg = "(libev) system error";
1406 ev_printerr (strerror (errno));
1416 ev_realloc_emul (void *ptr, long size) EV_THROW
1418 /* some systems, notably openbsd and darwin, fail to properly
1419 * implement realloc (x, 0) (as required by both ansi c-89 and
1420 * the single unix specification, so work around them here.
1421 * recently, also (at least) fedora and debian started breaking it,
1422 * despite documenting it otherwise.
1426 return realloc (ptr, size);
1432 static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
1435 ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
1441 ev_realloc (void *ptr, long size)
1443 ptr = alloc (ptr, size);
1448 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1450 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1458 #define ev_malloc(size) ev_realloc (0, (size))
1459 #define ev_free(ptr) ev_realloc ((ptr), 0)
1461 /*****************************************************************************/
1463 /* set in reify when reification needed */
1464 #define EV_ANFD_REIFY 1
1466 /* file descriptor info structure */
1470 unsigned char events; /* the events watched for */
1471 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1472 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
1473 unsigned char unused;
1475 unsigned int egen; /* generation counter to counter epoll bugs */
1477 #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1485 /* stores the pending event set for a given watcher */
1489 int events; /* the pending event set for the given watcher */
1493 /* hash table entry per inotify-id */
1501 #if EV_HEAP_CACHE_AT
1502 /* a heap element */
1508 #define ANHE_w(he) (he).w /* access watcher, read-write */
1509 #define ANHE_at(he) (he).at /* access cached at, read-only */
1510 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1512 /* a heap element */
1515 #define ANHE_w(he) (he)
1516 #define ANHE_at(he) (he)->at
1517 #define ANHE_at_cache(he)
1524 ev_tstamp ev_rt_now;
1525 #define ev_rt_now ((loop)->ev_rt_now)
1526 #define VAR(name,decl) decl;
1527 #include "ev_vars.h"
1530 #include "ev_wrap.h"
1532 static struct ev_loop default_loop_struct;
1533 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
1537 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
1538 #define VAR(name,decl) static decl;
1539 #include "ev_vars.h"
1542 static int ev_default_loop_ptr;
1547 # define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1548 # define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1549 # define EV_INVOKE_PENDING invoke_cb (EV_A)
1551 # define EV_RELEASE_CB (void)0
1552 # define EV_ACQUIRE_CB (void)0
1553 # define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1556 #define EVBREAK_RECURSE 0x80
1558 /*****************************************************************************/
1560 #ifndef EV_HAVE_EV_TIME
1562 ev_time (void) EV_THROW
1565 if (expect_true (have_realtime))
1568 clock_gettime (CLOCK_REALTIME, &ts);
1569 return ts.tv_sec + ts.tv_nsec * 1e-9;
1574 gettimeofday (&tv, 0);
1575 return tv.tv_sec + tv.tv_usec * 1e-6;
1579 inline_size ev_tstamp
1582 #if EV_USE_MONOTONIC
1583 if (expect_true (have_monotonic))
1586 clock_gettime (CLOCK_MONOTONIC, &ts);
1587 return ts.tv_sec + ts.tv_nsec * 1e-9;
1596 ev_now (EV_P) EV_THROW
1603 ev_sleep (ev_tstamp delay) EV_THROW
1607 #if EV_USE_NANOSLEEP
1610 EV_TS_SET (ts, delay);
1612 #elif defined _WIN32
1613 Sleep ((unsigned long)(delay * 1e3));
1617 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1618 /* something not guaranteed by newer posix versions, but guaranteed */
1620 EV_TV_SET (tv, delay);
1621 select (0, 0, 0, 0, &tv);
1626 /*****************************************************************************/
1628 #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1630 /* find a suitable new size for the given array, */
1631 /* hopefully by rounding to a nice-to-malloc size */
1633 array_nextsize (int elem, int cur, int cnt)
1641 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
1642 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
1645 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
1646 ncur = ncur - sizeof (void *) * 4;
1653 static void * noinline ecb_cold
1654 array_realloc (int elem, void *base, int *cur, int cnt)
1656 *cur = array_nextsize (elem, *cur, cnt);
1657 return ev_realloc (base, elem * *cur);
1660 #define array_init_zero(base,count) \
1661 memset ((void *)(base), 0, sizeof (*(base)) * (count))
1663 #define array_needsize(type,base,cur,cnt,init) \
1664 if (expect_false ((cnt) > (cur))) \
1666 int ecb_unused ocur_ = (cur); \
1667 (base) = (type *)array_realloc \
1668 (sizeof (type), (base), &(cur), (cnt)); \
1669 init ((base) + (ocur_), (cur) - ocur_); \
1673 #define array_slim(type,stem) \
1674 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
1676 stem ## max = array_roundsize (stem ## cnt >> 1); \
1677 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
1678 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
1682 #define array_free(stem, idx) \
1683 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
1685 /*****************************************************************************/
1687 /* dummy callback for pending events */
1688 static void noinline
1689 pendingcb (EV_P_ ev_prepare *w, int revents)
1694 ev_feed_event (EV_P_ void *w, int revents) EV_THROW
1697 int pri = ABSPRI (w_);
1699 if (expect_false (w_->pending))
1700 pendings [pri][w_->pending - 1].events |= revents;
1703 w_->pending = ++pendingcnt [pri];
1704 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1705 pendings [pri][w_->pending - 1].w = w_;
1706 pendings [pri][w_->pending - 1].events = revents;
1709 pendingpri = NUMPRI - 1;
1713 feed_reverse (EV_P_ W w)
1715 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1716 rfeeds [rfeedcnt++] = w;
1720 feed_reverse_done (EV_P_ int revents)
1723 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1728 queue_events (EV_P_ W *events, int eventcnt, int type)
1732 for (i = 0; i < eventcnt; ++i)
1733 ev_feed_event (EV_A_ events [i], type);
1736 /*****************************************************************************/
1739 fd_event_nocheck (EV_P_ int fd, int revents)
1741 ANFD *anfd = anfds + fd;
1744 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1746 int ev = w->events & revents;
1749 ev_feed_event (EV_A_ (W)w, ev);
1753 /* do not submit kernel events for fds that have reify set */
1754 /* because that means they changed while we were polling for new events */
1756 fd_event (EV_P_ int fd, int revents)
1758 ANFD *anfd = anfds + fd;
1760 if (expect_true (!anfd->reify))
1761 fd_event_nocheck (EV_A_ fd, revents);
1765 ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
1767 if (fd >= 0 && fd < anfdmax)
1768 fd_event_nocheck (EV_A_ fd, revents);
1771 /* make sure the external fd watch events are in-sync */
1772 /* with the kernel/libev internal state */
1778 #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1779 for (i = 0; i < fdchangecnt; ++i)
1781 int fd = fdchanges [i];
1782 ANFD *anfd = anfds + fd;
1784 if (anfd->reify & EV__IOFDSET && anfd->head)
1786 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1788 if (handle != anfd->handle)
1792 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1794 /* handle changed, but fd didn't - we need to do it in two steps */
1795 backend_modify (EV_A_ fd, anfd->events, 0);
1797 anfd->handle = handle;
1803 for (i = 0; i < fdchangecnt; ++i)
1805 int fd = fdchanges [i];
1806 ANFD *anfd = anfds + fd;
1809 unsigned char o_events = anfd->events;
1810 unsigned char o_reify = anfd->reify;
1814 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1818 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1819 anfd->events |= (unsigned char)w->events;
1821 if (o_events != anfd->events)
1822 o_reify = EV__IOFDSET; /* actually |= */
1825 if (o_reify & EV__IOFDSET)
1826 backend_modify (EV_A_ fd, o_events, anfd->events);
1832 /* something about the given fd changed */
1834 fd_change (EV_P_ int fd, int flags)
1836 unsigned char reify = anfds [fd].reify;
1837 anfds [fd].reify |= flags;
1839 if (expect_true (!reify))
1842 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
1843 fdchanges [fdchangecnt - 1] = fd;
1847 /* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1848 inline_speed void ecb_cold
1849 fd_kill (EV_P_ int fd)
1853 while ((w = (ev_io *)anfds [fd].head))
1855 ev_io_stop (EV_A_ w);
1856 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1860 /* check whether the given fd is actually valid, for error recovery */
1861 inline_size int ecb_cold
1865 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1867 return fcntl (fd, F_GETFD) != -1;
1871 /* called on EBADF to verify fds */
1872 static void noinline ecb_cold
1877 for (fd = 0; fd < anfdmax; ++fd)
1878 if (anfds [fd].events)
1879 if (!fd_valid (fd) && errno == EBADF)
1883 /* called on ENOMEM in select/poll to kill some fds and retry */
1884 static void noinline ecb_cold
1889 for (fd = anfdmax; fd--; )
1890 if (anfds [fd].events)
1897 /* usually called after fork if backend needs to re-arm all fds from scratch */
1898 static void noinline
1903 for (fd = 0; fd < anfdmax; ++fd)
1904 if (anfds [fd].events)
1906 anfds [fd].events = 0;
1907 anfds [fd].emask = 0;
1908 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1912 /* used to prepare libev internal fd's */
1913 /* this is not fork-safe */
1918 unsigned long arg = 1;
1919 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1921 fcntl (fd, F_SETFD, FD_CLOEXEC);
1922 fcntl (fd, F_SETFL, O_NONBLOCK);
1926 /*****************************************************************************/
1929 * the heap functions want a real array index. array index 0 is guaranteed to not
1930 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1931 * the branching factor of the d-tree.
1935 * at the moment we allow libev the luxury of two heaps,
1936 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1937 * which is more cache-efficient.
1938 * the difference is about 5% with 50000+ watchers.
1943 #define HEAP0 (DHEAP - 1) /* index of first element in heap */
1944 #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1945 #define UPHEAP_DONE(p,k) ((p) == (k))
1947 /* away from the root */
1949 downheap (ANHE *heap, int N, int k)
1952 ANHE *E = heap + N + HEAP0;
1958 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1960 /* find minimum child */
1961 if (expect_true (pos + DHEAP - 1 < E))
1963 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1964 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1965 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1966 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1970 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1971 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1972 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1973 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1978 if (ANHE_at (he) <= minat)
1982 ev_active (ANHE_w (*minpos)) = k;
1988 ev_active (ANHE_w (he)) = k;
1994 #define HPARENT(k) ((k) >> 1)
1995 #define UPHEAP_DONE(p,k) (!(p))
1997 /* away from the root */
1999 downheap (ANHE *heap, int N, int k)
2010 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
2013 if (ANHE_at (he) <= ANHE_at (heap [c]))
2016 heap [k] = heap [c];
2017 ev_active (ANHE_w (heap [k])) = k;
2023 ev_active (ANHE_w (he)) = k;
2027 /* towards the root */
2029 upheap (ANHE *heap, int k)
2035 int p = HPARENT (k);
2037 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
2040 heap [k] = heap [p];
2041 ev_active (ANHE_w (heap [k])) = k;
2046 ev_active (ANHE_w (he)) = k;
2049 /* move an element suitably so it is in a correct place */
2051 adjustheap (ANHE *heap, int N, int k)
2053 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
2056 downheap (heap, N, k);
2059 /* rebuild the heap: this function is used only once and executed rarely */
2061 reheap (ANHE *heap, int N)
2065 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
2066 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
2067 for (i = 0; i < N; ++i)
2068 upheap (heap, i + HEAP0);
2071 /*****************************************************************************/
2073 /* associate signal watchers to a signal signal */
2076 EV_ATOMIC_T pending;
2083 static ANSIG signals [EV_NSIG - 1];
2085 /*****************************************************************************/
2087 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2089 static void noinline ecb_cold
2092 if (!ev_is_active (&pipe_w))
2098 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2099 if (fds [1] < 0 && errno == EINVAL)
2100 fds [1] = eventfd (0, 0);
2106 ev_syserr ("(libev) error creating signal/async pipe");
2108 fd_intern (fds [0]);
2111 evpipe [0] = fds [0];
2114 evpipe [1] = fds [1]; /* first call, set write fd */
2117 /* on subsequent calls, do not change evpipe [1] */
2118 /* so that evpipe_write can always rely on its value. */
2119 /* this branch does not do anything sensible on windows, */
2120 /* so must not be executed on windows */
2122 dup2 (fds [1], evpipe [1]);
2126 fd_intern (evpipe [1]);
2128 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2129 ev_io_start (EV_A_ &pipe_w);
2130 ev_unref (EV_A); /* watcher should not keep loop alive */
2135 evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2137 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2139 if (expect_true (*flag))
2143 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2145 pipe_write_skipped = 1;
2147 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2149 if (pipe_write_wanted)
2153 pipe_write_skipped = 0;
2154 ECB_MEMORY_FENCE_RELEASE;
2156 old_errno = errno; /* save errno because write will clobber it */
2161 uint64_t counter = 1;
2162 write (evpipe [1], &counter, sizeof (uint64_t));
2172 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2174 write (evpipe [1], &(evpipe [1]), 1);
2182 /* called whenever the libev signal pipe */
2183 /* got some events (signal, async) */
2185 pipecb (EV_P_ ev_io *iow, int revents)
2189 if (revents & EV_READ)
2195 read (evpipe [1], &counter, sizeof (uint64_t));
2206 buf.len = sizeof (dummy);
2207 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2209 read (evpipe [0], &dummy, sizeof (dummy));
2214 pipe_write_skipped = 0;
2216 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2218 #if EV_SIGNAL_ENABLE
2225 for (i = EV_NSIG - 1; i--; )
2226 if (expect_false (signals [i].pending))
2227 ev_feed_signal_event (EV_A_ i + 1);
2238 for (i = asynccnt; i--; )
2239 if (asyncs [i]->sent)
2241 asyncs [i]->sent = 0;
2242 ECB_MEMORY_FENCE_RELEASE;
2243 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
2249 /*****************************************************************************/
2252 ev_feed_signal (int signum) EV_THROW
2256 ECB_MEMORY_FENCE_ACQUIRE;
2257 EV_A = signals [signum - 1].loop;
2263 signals [signum - 1].pending = 1;
2264 evpipe_write (EV_A_ &sig_pending);
2268 ev_sighandler (int signum)
2271 signal (signum, ev_sighandler);
2274 ev_feed_signal (signum);
2278 ev_feed_signal_event (EV_P_ int signum) EV_THROW
2282 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2288 /* it is permissible to try to feed a signal to the wrong loop */
2289 /* or, likely more useful, feeding a signal nobody is waiting for */
2291 if (expect_false (signals [signum].loop != EV_A))
2295 signals [signum].pending = 0;
2296 ECB_MEMORY_FENCE_RELEASE;
2298 for (w = signals [signum].head; w; w = w->next)
2299 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2304 sigfdcb (EV_P_ ev_io *iow, int revents)
2306 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2310 ssize_t res = read (sigfd, si, sizeof (si));
2312 /* not ISO-C, as res might be -1, but works with SuS */
2313 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2314 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2316 if (res < (ssize_t)sizeof (si))
2324 /*****************************************************************************/
2327 static WL childs [EV_PID_HASHSIZE];
2329 static ev_signal childev;
2331 #ifndef WIFCONTINUED
2332 # define WIFCONTINUED(status) 0
2335 /* handle a single child status event */
2337 child_reap (EV_P_ int chain, int pid, int status)
2340 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
2342 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2344 if ((w->pid == pid || !w->pid)
2345 && (!traced || (w->flags & 1)))
2347 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
2349 w->rstatus = status;
2350 ev_feed_event (EV_A_ (W)w, EV_CHILD);
2356 # define WCONTINUED 0
2359 /* called on sigchld etc., calls waitpid */
2361 childcb (EV_P_ ev_signal *sw, int revents)
2365 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
2366 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
2369 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
2372 /* make sure we are called again until all children have been reaped */
2373 /* we need to do it this way so that the callback gets called before we continue */
2374 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
2376 child_reap (EV_A_ pid, pid, status);
2377 if ((EV_PID_HASHSIZE) > 1)
2378 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
2383 /*****************************************************************************/
2386 # include "ev_iocp.c"
2389 # include "ev_port.c"
2392 # include "ev_kqueue.c"
2395 # include "ev_epoll.c"
2398 # include "ev_poll.c"
2401 # include "ev_select.c"
2405 ev_version_major (void) EV_THROW
2407 return EV_VERSION_MAJOR;
2411 ev_version_minor (void) EV_THROW
2413 return EV_VERSION_MINOR;
2416 /* return true if we are running with elevated privileges and should ignore env variables */
2417 int inline_size ecb_cold
2418 enable_secure (void)
2423 return getuid () != geteuid ()
2424 || getgid () != getegid ();
2428 unsigned int ecb_cold
2429 ev_supported_backends (void) EV_THROW
2431 unsigned int flags = 0;
2433 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2434 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
2435 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2436 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2437 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2442 unsigned int ecb_cold
2443 ev_recommended_backends (void) EV_THROW
2445 unsigned int flags = ev_supported_backends ();
2448 /* kqueue is borked on everything but netbsd apparently */
2449 /* it usually doesn't work correctly on anything but sockets and pipes */
2450 flags &= ~EVBACKEND_KQUEUE;
2453 /* only select works correctly on that "unix-certified" platform */
2454 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2455 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2458 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2464 unsigned int ecb_cold
2465 ev_embeddable_backends (void) EV_THROW
2467 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2469 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2470 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2471 flags &= ~EVBACKEND_EPOLL;
2477 ev_backend (EV_P) EV_THROW
2484 ev_iteration (EV_P) EV_THROW
2490 ev_depth (EV_P) EV_THROW
2496 ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2498 io_blocktime = interval;
2502 ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2504 timeout_blocktime = interval;
2508 ev_set_userdata (EV_P_ void *data) EV_THROW
2514 ev_userdata (EV_P) EV_THROW
2520 ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
2522 invoke_cb = invoke_pending_cb;
2526 ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2528 release_cb = release;
2529 acquire_cb = acquire;
2533 /* initialise a loop structure, must be zero-initialised */
2534 static void noinline ecb_cold
2535 loop_init (EV_P_ unsigned int flags) EV_THROW
2546 if (!clock_gettime (CLOCK_REALTIME, &ts))
2551 #if EV_USE_MONOTONIC
2552 if (!have_monotonic)
2556 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
2561 /* pid check not overridable via env */
2563 if (flags & EVFLAG_FORKCHECK)
2567 if (!(flags & EVFLAG_NOENV)
2568 && !enable_secure ()
2569 && getenv ("LIBEV_FLAGS"))
2570 flags = atoi (getenv ("LIBEV_FLAGS"));
2572 ev_rt_now = ev_time ();
2573 mn_now = get_clock ();
2575 rtmn_diff = ev_rt_now - mn_now;
2577 invoke_cb = ev_invoke_pending;
2581 timeout_blocktime = 0.;
2588 pipe_write_skipped = 0;
2589 pipe_write_wanted = 0;
2593 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2596 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2599 if (!(flags & EVBACKEND_MASK))
2600 flags |= ev_recommended_backends ();
2603 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2606 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
2609 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
2612 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
2615 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
2618 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
2621 ev_prepare_init (&pending_w, pendingcb);
2623 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2624 ev_init (&pipe_w, pipecb);
2625 ev_set_priority (&pipe_w, EV_MAXPRI);
2630 /* free up a loop structure */
2632 ev_loop_destroy (EV_P)
2637 /* mimic free (0) */
2642 #if EV_CLEANUP_ENABLE
2643 /* queue cleanup watchers (and execute them) */
2644 if (expect_false (cleanupcnt))
2646 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2652 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2654 ev_ref (EV_A); /* child watcher */
2655 ev_signal_stop (EV_A_ &childev);
2659 if (ev_is_active (&pipe_w))
2662 /*ev_io_stop (EV_A_ &pipe_w);*/
2664 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2665 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2669 if (ev_is_active (&sigfd_w))
2678 if (backend_fd >= 0)
2682 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2685 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
2688 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
2691 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
2694 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
2697 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
2700 for (i = NUMPRI; i--; )
2702 array_free (pending, [i]);
2704 array_free (idle, [i]);
2708 ev_free (anfds); anfds = 0; anfdmax = 0;
2710 /* have to use the microsoft-never-gets-it-right macro */
2711 array_free (rfeed, EMPTY);
2712 array_free (fdchange, EMPTY);
2713 array_free (timer, EMPTY);
2714 #if EV_PERIODIC_ENABLE
2715 array_free (periodic, EMPTY);
2718 array_free (fork, EMPTY);
2720 #if EV_CLEANUP_ENABLE
2721 array_free (cleanup, EMPTY);
2723 array_free (prepare, EMPTY);
2724 array_free (check, EMPTY);
2726 array_free (async, EMPTY);
2732 if (ev_is_default_loop (EV_A))
2734 ev_default_loop_ptr = 0;
2742 inline_size void infy_fork (EV_P);
2749 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
2752 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
2755 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
2761 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2762 if (ev_is_active (&pipe_w))
2764 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2767 ev_io_stop (EV_A_ &pipe_w);
2769 if (evpipe [0] >= 0)
2770 EV_WIN32_CLOSE_FD (evpipe [0]);
2773 /* iterate over everything, in case we missed something before */
2774 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2783 struct ev_loop * ecb_cold
2784 ev_loop_new (unsigned int flags) EV_THROW
2786 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2788 memset (EV_A, 0, sizeof (struct ev_loop));
2789 loop_init (EV_A_ flags);
2791 if (ev_backend (EV_A))
2798 #endif /* multiplicity */
2801 static void noinline ecb_cold
2802 verify_watcher (EV_P_ W w)
2804 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2807 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2810 static void noinline ecb_cold
2811 verify_heap (EV_P_ ANHE *heap, int N)
2815 for (i = HEAP0; i < N + HEAP0; ++i)
2817 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2818 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2819 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2821 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2825 static void noinline ecb_cold
2826 array_verify (EV_P_ W *ws, int cnt)
2830 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2831 verify_watcher (EV_A_ ws [cnt]);
2838 ev_verify (EV_P) EV_THROW
2844 assert (activecnt >= -1);
2846 assert (fdchangemax >= fdchangecnt);
2847 for (i = 0; i < fdchangecnt; ++i)
2848 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2850 assert (anfdmax >= 0);
2851 for (i = 0; i < anfdmax; ++i)
2855 for (w = w2 = anfds [i].head; w; w = w->next)
2857 verify_watcher (EV_A_ (W)w);
2861 assert (("libev: io watcher list contains a loop", w != w2));
2865 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2866 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2870 assert (timermax >= timercnt);
2871 verify_heap (EV_A_ timers, timercnt);
2873 #if EV_PERIODIC_ENABLE
2874 assert (periodicmax >= periodiccnt);
2875 verify_heap (EV_A_ periodics, periodiccnt);
2878 for (i = NUMPRI; i--; )
2880 assert (pendingmax [i] >= pendingcnt [i]);
2882 assert (idleall >= 0);
2883 assert (idlemax [i] >= idlecnt [i]);
2884 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2889 assert (forkmax >= forkcnt);
2890 array_verify (EV_A_ (W *)forks, forkcnt);
2893 #if EV_CLEANUP_ENABLE
2894 assert (cleanupmax >= cleanupcnt);
2895 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2899 assert (asyncmax >= asynccnt);
2900 array_verify (EV_A_ (W *)asyncs, asynccnt);
2903 #if EV_PREPARE_ENABLE
2904 assert (preparemax >= preparecnt);
2905 array_verify (EV_A_ (W *)prepares, preparecnt);
2909 assert (checkmax >= checkcnt);
2910 array_verify (EV_A_ (W *)checks, checkcnt);
2915 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2916 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2924 struct ev_loop * ecb_cold
2928 ev_default_loop (unsigned int flags) EV_THROW
2930 if (!ev_default_loop_ptr)
2933 EV_P = ev_default_loop_ptr = &default_loop_struct;
2935 ev_default_loop_ptr = 1;
2938 loop_init (EV_A_ flags);
2940 if (ev_backend (EV_A))
2943 ev_signal_init (&childev, childcb, SIGCHLD);
2944 ev_set_priority (&childev, EV_MAXPRI);
2945 ev_signal_start (EV_A_ &childev);
2946 ev_unref (EV_A); /* child watcher should not keep loop alive */
2950 ev_default_loop_ptr = 0;
2953 return ev_default_loop_ptr;
2957 ev_loop_fork (EV_P) EV_THROW
2962 /*****************************************************************************/
2965 ev_invoke (EV_P_ void *w, int revents)
2967 EV_CB_INVOKE ((W)w, revents);
2971 ev_pending_count (EV_P) EV_THROW
2974 unsigned int count = 0;
2976 for (pri = NUMPRI; pri--; )
2977 count += pendingcnt [pri];
2983 ev_invoke_pending (EV_P)
2985 pendingpri = NUMPRI;
2987 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
2991 while (pendingcnt [pendingpri])
2993 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2996 EV_CB_INVOKE (p->w, p->events);
3003 /* make idle watchers pending. this handles the "call-idle */
3004 /* only when higher priorities are idle" logic */
3008 if (expect_false (idleall))
3012 for (pri = NUMPRI; pri--; )
3014 if (pendingcnt [pri])
3019 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
3027 /* make timers pending */
3033 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
3037 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
3039 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
3041 /* first reschedule or stop timer */
3044 ev_at (w) += w->repeat;
3045 if (ev_at (w) < mn_now)
3048 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
3050 ANHE_at_cache (timers [HEAP0]);
3051 downheap (timers, timercnt, HEAP0);
3054 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
3057 feed_reverse (EV_A_ (W)w);
3059 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
3061 feed_reverse_done (EV_A_ EV_TIMER);
3065 #if EV_PERIODIC_ENABLE
3067 static void noinline
3068 periodic_recalc (EV_P_ ev_periodic *w)
3070 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3071 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3073 /* the above almost always errs on the low side */
3074 while (at <= ev_rt_now)
3076 ev_tstamp nat = at + w->interval;
3078 /* when resolution fails us, we use ev_rt_now */
3079 if (expect_false (nat == at))
3091 /* make periodics pending */
3093 periodics_reify (EV_P)
3097 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
3101 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
3103 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
3105 /* first reschedule or stop timer */
3106 if (w->reschedule_cb)
3108 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3110 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
3112 ANHE_at_cache (periodics [HEAP0]);
3113 downheap (periodics, periodiccnt, HEAP0);
3115 else if (w->interval)
3117 periodic_recalc (EV_A_ w);
3118 ANHE_at_cache (periodics [HEAP0]);
3119 downheap (periodics, periodiccnt, HEAP0);
3122 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
3125 feed_reverse (EV_A_ (W)w);
3127 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
3129 feed_reverse_done (EV_A_ EV_PERIODIC);
3133 /* simply recalculate all periodics */
3134 /* TODO: maybe ensure that at least one event happens when jumping forward? */
3135 static void noinline ecb_cold
3136 periodics_reschedule (EV_P)
3140 /* adjust periodics after time jump */
3141 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
3143 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
3145 if (w->reschedule_cb)
3146 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3147 else if (w->interval)
3148 periodic_recalc (EV_A_ w);
3150 ANHE_at_cache (periodics [i]);
3153 reheap (periodics, periodiccnt);
3157 /* adjust all timers by a given offset */
3158 static void noinline ecb_cold
3159 timers_reschedule (EV_P_ ev_tstamp adjust)
3163 for (i = 0; i < timercnt; ++i)
3165 ANHE *he = timers + i + HEAP0;
3166 ANHE_w (*he)->at += adjust;
3167 ANHE_at_cache (*he);
3171 /* fetch new monotonic and realtime times from the kernel */
3172 /* also detect if there was a timejump, and act accordingly */
3174 time_update (EV_P_ ev_tstamp max_block)
3176 #if EV_USE_MONOTONIC
3177 if (expect_true (have_monotonic))
3180 ev_tstamp odiff = rtmn_diff;
3182 mn_now = get_clock ();
3184 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
3185 /* interpolate in the meantime */
3186 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
3188 ev_rt_now = rtmn_diff + mn_now;
3193 ev_rt_now = ev_time ();
3195 /* loop a few times, before making important decisions.
3196 * on the choice of "4": one iteration isn't enough,
3197 * in case we get preempted during the calls to
3198 * ev_time and get_clock. a second call is almost guaranteed
3199 * to succeed in that case, though. and looping a few more times
3200 * doesn't hurt either as we only do this on time-jumps or
3201 * in the unlikely event of having been preempted here.
3206 rtmn_diff = ev_rt_now - mn_now;
3208 diff = odiff - rtmn_diff;
3210 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
3211 return; /* all is well */
3213 ev_rt_now = ev_time ();
3214 mn_now = get_clock ();
3218 /* no timer adjustment, as the monotonic clock doesn't jump */
3219 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
3220 # if EV_PERIODIC_ENABLE
3221 periodics_reschedule (EV_A);
3227 ev_rt_now = ev_time ();
3229 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
3231 /* adjust timers. this is easy, as the offset is the same for all of them */
3232 timers_reschedule (EV_A_ ev_rt_now - mn_now);
3233 #if EV_PERIODIC_ENABLE
3234 periodics_reschedule (EV_A);
3243 ev_run (EV_P_ int flags)
3249 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3251 loop_done = EVBREAK_CANCEL;
3253 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
3262 if (expect_false (curpid)) /* penalise the forking check even more */
3263 if (expect_false (getpid () != curpid))
3271 /* we might have forked, so queue fork handlers */
3272 if (expect_false (postfork))
3275 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
3280 #if EV_PREPARE_ENABLE
3281 /* queue prepare watchers (and execute them) */
3282 if (expect_false (preparecnt))
3284 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
3289 if (expect_false (loop_done))
3292 /* we might have forked, so reify kernel state if necessary */
3293 if (expect_false (postfork))
3296 /* update fd-related kernel structures */
3299 /* calculate blocking time */
3301 ev_tstamp waittime = 0.;
3302 ev_tstamp sleeptime = 0.;
3304 /* remember old timestamp for io_blocktime calculation */
3305 ev_tstamp prev_mn_now = mn_now;
3307 /* update time to cancel out callback processing overhead */
3308 time_update (EV_A_ 1e100);
3310 /* from now on, we want a pipe-wake-up */
3311 pipe_write_wanted = 1;
3313 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3315 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
3317 waittime = MAX_BLOCKTIME;
3321 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
3322 if (waittime > to) waittime = to;
3325 #if EV_PERIODIC_ENABLE
3328 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
3329 if (waittime > to) waittime = to;
3333 /* don't let timeouts decrease the waittime below timeout_blocktime */
3334 if (expect_false (waittime < timeout_blocktime))
3335 waittime = timeout_blocktime;
3337 /* at this point, we NEED to wait, so we have to ensure */
3338 /* to pass a minimum nonzero value to the backend */
3339 if (expect_false (waittime < backend_mintime))
3340 waittime = backend_mintime;
3342 /* extra check because io_blocktime is commonly 0 */
3343 if (expect_false (io_blocktime))
3345 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3347 if (sleeptime > waittime - backend_mintime)
3348 sleeptime = waittime - backend_mintime;
3350 if (expect_true (sleeptime > 0.))
3352 ev_sleep (sleeptime);
3353 waittime -= sleeptime;
3361 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
3362 backend_poll (EV_A_ waittime);
3363 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3365 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3367 ECB_MEMORY_FENCE_ACQUIRE;
3368 if (pipe_write_skipped)
3370 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3371 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3375 /* update ev_rt_now, do magic */
3376 time_update (EV_A_ waittime + sleeptime);
3379 /* queue pending timers and reschedule them */
3380 timers_reify (EV_A); /* relative timers called last */
3381 #if EV_PERIODIC_ENABLE
3382 periodics_reify (EV_A); /* absolute timers called first */
3386 /* queue idle watchers unless other events are pending */
3391 /* queue check watchers, to be executed first */
3392 if (expect_false (checkcnt))
3393 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3398 while (expect_true (
3401 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3404 if (loop_done == EVBREAK_ONE)
3405 loop_done = EVBREAK_CANCEL;
3415 ev_break (EV_P_ int how) EV_THROW
3421 ev_ref (EV_P) EV_THROW
3427 ev_unref (EV_P) EV_THROW
3433 ev_now_update (EV_P) EV_THROW
3435 time_update (EV_A_ 1e100);
3439 ev_suspend (EV_P) EV_THROW
3441 ev_now_update (EV_A);
3445 ev_resume (EV_P) EV_THROW
3447 ev_tstamp mn_prev = mn_now;
3449 ev_now_update (EV_A);
3450 timers_reschedule (EV_A_ mn_now - mn_prev);
3451 #if EV_PERIODIC_ENABLE
3452 /* TODO: really do this? */
3453 periodics_reschedule (EV_A);
3457 /*****************************************************************************/
3458 /* singly-linked list management, used when the expected list length is short */
3461 wlist_add (WL *head, WL elem)
3468 wlist_del (WL *head, WL elem)
3472 if (expect_true (*head == elem))
3478 head = &(*head)->next;
3482 /* internal, faster, version of ev_clear_pending */
3484 clear_pending (EV_P_ W w)
3488 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
3494 ev_clear_pending (EV_P_ void *w) EV_THROW
3497 int pending = w_->pending;
3499 if (expect_true (pending))
3501 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3502 p->w = (W)&pending_w;
3511 pri_adjust (EV_P_ W w)
3513 int pri = ev_priority (w);
3514 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3515 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3516 ev_set_priority (w, pri);
3520 ev_start (EV_P_ W w, int active)
3522 pri_adjust (EV_A_ w);
3534 /*****************************************************************************/
3537 ev_io_start (EV_P_ ev_io *w) EV_THROW
3541 if (expect_false (ev_is_active (w)))
3544 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3545 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3549 ev_start (EV_A_ (W)w, 1);
3550 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
3551 wlist_add (&anfds[fd].head, (WL)w);
3553 /* common bug, apparently */
3554 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3556 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3557 w->events &= ~EV__IOFDSET;
3563 ev_io_stop (EV_P_ ev_io *w) EV_THROW
3565 clear_pending (EV_A_ (W)w);
3566 if (expect_false (!ev_is_active (w)))
3569 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3573 wlist_del (&anfds[w->fd].head, (WL)w);
3574 ev_stop (EV_A_ (W)w);
3576 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3582 ev_timer_start (EV_P_ ev_timer *w) EV_THROW
3584 if (expect_false (ev_is_active (w)))
3587 ev_at (w) += mn_now;
3589 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
3594 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
3595 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
3596 ANHE_w (timers [ev_active (w)]) = (WT)w;
3597 ANHE_at_cache (timers [ev_active (w)]);
3598 upheap (timers, ev_active (w));
3602 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
3606 ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
3608 clear_pending (EV_A_ (W)w);
3609 if (expect_false (!ev_is_active (w)))
3615 int active = ev_active (w);
3617 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3621 if (expect_true (active < timercnt + HEAP0))
3623 timers [active] = timers [timercnt + HEAP0];
3624 adjustheap (timers, timercnt, active);
3628 ev_at (w) -= mn_now;
3630 ev_stop (EV_A_ (W)w);
3636 ev_timer_again (EV_P_ ev_timer *w) EV_THROW
3640 clear_pending (EV_A_ (W)w);
3642 if (ev_is_active (w))
3646 ev_at (w) = mn_now + w->repeat;
3647 ANHE_at_cache (timers [ev_active (w)]);
3648 adjustheap (timers, timercnt, ev_active (w));
3651 ev_timer_stop (EV_A_ w);
3655 ev_at (w) = w->repeat;
3656 ev_timer_start (EV_A_ w);
3663 ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3665 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3668 #if EV_PERIODIC_ENABLE
3670 ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
3672 if (expect_false (ev_is_active (w)))
3675 if (w->reschedule_cb)
3676 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3677 else if (w->interval)
3679 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
3680 periodic_recalc (EV_A_ w);
3683 ev_at (w) = w->offset;
3688 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
3689 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
3690 ANHE_w (periodics [ev_active (w)]) = (WT)w;
3691 ANHE_at_cache (periodics [ev_active (w)]);
3692 upheap (periodics, ev_active (w));
3696 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
3700 ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
3702 clear_pending (EV_A_ (W)w);
3703 if (expect_false (!ev_is_active (w)))
3709 int active = ev_active (w);
3711 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3715 if (expect_true (active < periodiccnt + HEAP0))
3717 periodics [active] = periodics [periodiccnt + HEAP0];
3718 adjustheap (periodics, periodiccnt, active);
3722 ev_stop (EV_A_ (W)w);
3728 ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
3730 /* TODO: use adjustheap and recalculation */
3731 ev_periodic_stop (EV_A_ w);
3732 ev_periodic_start (EV_A_ w);
3737 # define SA_RESTART 0
3740 #if EV_SIGNAL_ENABLE
3743 ev_signal_start (EV_P_ ev_signal *w) EV_THROW
3745 if (expect_false (ev_is_active (w)))
3748 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3751 assert (("libev: a signal must not be attached to two different loops",
3752 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3754 signals [w->signum - 1].loop = EV_A;
3755 ECB_MEMORY_FENCE_RELEASE;
3763 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3764 if (sigfd < 0 && errno == EINVAL)
3765 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3769 fd_intern (sigfd); /* doing it twice will not hurt */
3771 sigemptyset (&sigfd_set);
3773 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3774 ev_set_priority (&sigfd_w, EV_MAXPRI);
3775 ev_io_start (EV_A_ &sigfd_w);
3776 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3782 /* TODO: check .head */
3783 sigaddset (&sigfd_set, w->signum);
3784 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3786 signalfd (sigfd, &sigfd_set, 0);
3790 ev_start (EV_A_ (W)w, 1);
3791 wlist_add (&signals [w->signum - 1].head, (WL)w);
3794 # if EV_USE_SIGNALFD
3795 if (sigfd < 0) /*TODO*/
3801 signal (w->signum, ev_sighandler);
3803 struct sigaction sa;
3807 sa.sa_handler = ev_sighandler;
3808 sigfillset (&sa.sa_mask);
3809 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3810 sigaction (w->signum, &sa, 0);
3812 if (origflags & EVFLAG_NOSIGMASK)
3814 sigemptyset (&sa.sa_mask);
3815 sigaddset (&sa.sa_mask, w->signum);
3816 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3825 ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
3827 clear_pending (EV_A_ (W)w);
3828 if (expect_false (!ev_is_active (w)))
3833 wlist_del (&signals [w->signum - 1].head, (WL)w);
3834 ev_stop (EV_A_ (W)w);
3836 if (!signals [w->signum - 1].head)
3839 signals [w->signum - 1].loop = 0; /* unattach from signal */
3847 sigaddset (&ss, w->signum);
3848 sigdelset (&sigfd_set, w->signum);
3850 signalfd (sigfd, &sigfd_set, 0);
3851 sigprocmask (SIG_UNBLOCK, &ss, 0);
3855 signal (w->signum, SIG_DFL);
3866 ev_child_start (EV_P_ ev_child *w) EV_THROW
3869 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3871 if (expect_false (ev_is_active (w)))
3876 ev_start (EV_A_ (W)w, 1);
3877 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3883 ev_child_stop (EV_P_ ev_child *w) EV_THROW
3885 clear_pending (EV_A_ (W)w);
3886 if (expect_false (!ev_is_active (w)))
3891 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3892 ev_stop (EV_A_ (W)w);
3903 # define lstat(a,b) _stati64 (a,b)
3906 #define DEF_STAT_INTERVAL 5.0074891
3907 #define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3908 #define MIN_STAT_INTERVAL 0.1074891
3910 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3914 /* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3915 # define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3917 static void noinline
3918 infy_add (EV_P_ ev_stat *w)
3920 w->wd = inotify_add_watch (fs_fd, w->path,
3921 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
3922 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
3923 | IN_DONT_FOLLOW | IN_MASK_ADD);
3929 /* now local changes will be tracked by inotify, but remote changes won't */
3930 /* unless the filesystem is known to be local, we therefore still poll */
3931 /* also do poll on <2.6.25, but with normal frequency */
3934 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3935 else if (!statfs (w->path, &sfs)
3936 && (sfs.f_type == 0x1373 /* devfs */
3937 || sfs.f_type == 0x4006 /* fat */
3938 || sfs.f_type == 0x4d44 /* msdos */
3939 || sfs.f_type == 0xEF53 /* ext2/3 */
3940 || sfs.f_type == 0x72b6 /* jffs2 */
3941 || sfs.f_type == 0x858458f6 /* ramfs */
3942 || sfs.f_type == 0x5346544e /* ntfs */
3943 || sfs.f_type == 0x3153464a /* jfs */
3944 || sfs.f_type == 0x9123683e /* btrfs */
3945 || sfs.f_type == 0x52654973 /* reiser3 */
3946 || sfs.f_type == 0x01021994 /* tmpfs */
3947 || sfs.f_type == 0x58465342 /* xfs */))
3948 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3950 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3954 /* can't use inotify, continue to stat */
3955 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3957 /* if path is not there, monitor some parent directory for speedup hints */
3958 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3959 /* but an efficiency issue only */
3960 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
3963 strcpy (path, w->path);
3967 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
3968 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
3970 char *pend = strrchr (path, '/');
3972 if (!pend || pend == path)
3976 w->wd = inotify_add_watch (fs_fd, path, mask);
3978 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3983 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3985 /* now re-arm timer, if required */
3986 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3987 ev_timer_again (EV_A_ &w->timer);
3988 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3991 static void noinline
3992 infy_del (EV_P_ ev_stat *w)
4001 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
4002 wlist_del (&fs_hash [slot].head, (WL)w);
4004 /* remove this watcher, if others are watching it, they will rearm */
4005 inotify_rm_watch (fs_fd, wd);
4008 static void noinline
4009 infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
4012 /* overflow, need to check for all hash slots */
4013 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
4014 infy_wd (EV_A_ slot, wd, ev);
4019 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
4021 ev_stat *w = (ev_stat *)w_;
4022 w_ = w_->next; /* lets us remove this watcher and all before it */
4024 if (w->wd == wd || wd == -1)
4026 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
4028 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4030 infy_add (EV_A_ w); /* re-add, no matter what */
4033 stat_timer_cb (EV_A_ &w->timer, 0);
4040 infy_cb (EV_P_ ev_io *w, int revents)
4042 char buf [EV_INOTIFY_BUFSIZE];
4044 int len = read (fs_fd, buf, sizeof (buf));
4046 for (ofs = 0; ofs < len; )
4048 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
4049 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4050 ofs += sizeof (struct inotify_event) + ev->len;
4054 inline_size void ecb_cold
4055 ev_check_2625 (EV_P)
4057 /* kernels < 2.6.25 are borked
4058 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4060 if (ev_linux_version () < 0x020619)
4069 #if defined IN_CLOEXEC && defined IN_NONBLOCK
4070 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4074 return inotify_init ();
4085 ev_check_2625 (EV_A);
4087 fs_fd = infy_newfd ();
4092 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
4093 ev_set_priority (&fs_w, EV_MAXPRI);
4094 ev_io_start (EV_A_ &fs_w);
4108 ev_io_stop (EV_A_ &fs_w);
4110 fs_fd = infy_newfd ();
4115 ev_io_set (&fs_w, fs_fd, EV_READ);
4116 ev_io_start (EV_A_ &fs_w);
4120 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
4122 WL w_ = fs_hash [slot].head;
4123 fs_hash [slot].head = 0;
4127 ev_stat *w = (ev_stat *)w_;
4128 w_ = w_->next; /* lets us add this watcher */
4133 infy_add (EV_A_ w); /* re-add, no matter what */
4136 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4137 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4138 ev_timer_again (EV_A_ &w->timer);
4139 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4148 # define EV_LSTAT(p,b) _stati64 (p, b)
4150 # define EV_LSTAT(p,b) lstat (p, b)
4154 ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
4156 if (lstat (w->path, &w->attr) < 0)
4157 w->attr.st_nlink = 0;
4158 else if (!w->attr.st_nlink)
4159 w->attr.st_nlink = 1;
4162 static void noinline
4163 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
4165 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
4167 ev_statdata prev = w->attr;
4168 ev_stat_stat (EV_A_ w);
4170 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
4172 prev.st_dev != w->attr.st_dev
4173 || prev.st_ino != w->attr.st_ino
4174 || prev.st_mode != w->attr.st_mode
4175 || prev.st_nlink != w->attr.st_nlink
4176 || prev.st_uid != w->attr.st_uid
4177 || prev.st_gid != w->attr.st_gid
4178 || prev.st_rdev != w->attr.st_rdev
4179 || prev.st_size != w->attr.st_size
4180 || prev.st_atime != w->attr.st_atime
4181 || prev.st_mtime != w->attr.st_mtime
4182 || prev.st_ctime != w->attr.st_ctime
4184 /* we only update w->prev on actual differences */
4185 /* in case we test more often than invoke the callback, */
4186 /* to ensure that prev is always different to attr */
4194 ev_stat_stat (EV_A_ w); /* avoid race... */
4198 ev_feed_event (EV_A_ w, EV_STAT);
4203 ev_stat_start (EV_P_ ev_stat *w) EV_THROW
4205 if (expect_false (ev_is_active (w)))
4208 ev_stat_stat (EV_A_ w);
4210 if (w->interval < MIN_STAT_INTERVAL && w->interval)
4211 w->interval = MIN_STAT_INTERVAL;
4213 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
4214 ev_set_priority (&w->timer, ev_priority (w));
4224 ev_timer_again (EV_A_ &w->timer);
4228 ev_start (EV_A_ (W)w, 1);
4234 ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
4236 clear_pending (EV_A_ (W)w);
4237 if (expect_false (!ev_is_active (w)))
4246 if (ev_is_active (&w->timer))
4249 ev_timer_stop (EV_A_ &w->timer);
4252 ev_stop (EV_A_ (W)w);
4260 ev_idle_start (EV_P_ ev_idle *w) EV_THROW
4262 if (expect_false (ev_is_active (w)))
4265 pri_adjust (EV_A_ (W)w);
4270 int active = ++idlecnt [ABSPRI (w)];
4273 ev_start (EV_A_ (W)w, active);
4275 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
4276 idles [ABSPRI (w)][active - 1] = w;
4283 ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
4285 clear_pending (EV_A_ (W)w);
4286 if (expect_false (!ev_is_active (w)))
4292 int active = ev_active (w);
4294 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
4295 ev_active (idles [ABSPRI (w)][active - 1]) = active;
4297 ev_stop (EV_A_ (W)w);
4305 #if EV_PREPARE_ENABLE
4307 ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
4309 if (expect_false (ev_is_active (w)))
4314 ev_start (EV_A_ (W)w, ++preparecnt);
4315 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
4316 prepares [preparecnt - 1] = w;
4322 ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
4324 clear_pending (EV_A_ (W)w);
4325 if (expect_false (!ev_is_active (w)))
4331 int active = ev_active (w);
4333 prepares [active - 1] = prepares [--preparecnt];
4334 ev_active (prepares [active - 1]) = active;
4337 ev_stop (EV_A_ (W)w);
4345 ev_check_start (EV_P_ ev_check *w) EV_THROW
4347 if (expect_false (ev_is_active (w)))
4352 ev_start (EV_A_ (W)w, ++checkcnt);
4353 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
4354 checks [checkcnt - 1] = w;
4360 ev_check_stop (EV_P_ ev_check *w) EV_THROW
4362 clear_pending (EV_A_ (W)w);
4363 if (expect_false (!ev_is_active (w)))
4369 int active = ev_active (w);
4371 checks [active - 1] = checks [--checkcnt];
4372 ev_active (checks [active - 1]) = active;
4375 ev_stop (EV_A_ (W)w);
4383 ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
4385 ev_run (w->other, EVRUN_NOWAIT);
4389 embed_io_cb (EV_P_ ev_io *io, int revents)
4391 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
4394 ev_feed_event (EV_A_ (W)w, EV_EMBED);
4396 ev_run (w->other, EVRUN_NOWAIT);
4400 embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4402 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4410 ev_run (EV_A_ EVRUN_NOWAIT);
4416 embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4418 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4420 ev_embed_stop (EV_A_ w);
4425 ev_loop_fork (EV_A);
4426 ev_run (EV_A_ EVRUN_NOWAIT);
4429 ev_embed_start (EV_A_ w);
4434 embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4436 ev_idle_stop (EV_A_ idle);
4441 ev_embed_start (EV_P_ ev_embed *w) EV_THROW
4443 if (expect_false (ev_is_active (w)))
4448 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4449 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4454 ev_set_priority (&w->io, ev_priority (w));
4455 ev_io_start (EV_A_ &w->io);
4457 ev_prepare_init (&w->prepare, embed_prepare_cb);
4458 ev_set_priority (&w->prepare, EV_MINPRI);
4459 ev_prepare_start (EV_A_ &w->prepare);
4461 ev_fork_init (&w->fork, embed_fork_cb);
4462 ev_fork_start (EV_A_ &w->fork);
4464 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4466 ev_start (EV_A_ (W)w, 1);
4472 ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
4474 clear_pending (EV_A_ (W)w);
4475 if (expect_false (!ev_is_active (w)))
4480 ev_io_stop (EV_A_ &w->io);
4481 ev_prepare_stop (EV_A_ &w->prepare);
4482 ev_fork_stop (EV_A_ &w->fork);
4484 ev_stop (EV_A_ (W)w);
4492 ev_fork_start (EV_P_ ev_fork *w) EV_THROW
4494 if (expect_false (ev_is_active (w)))
4499 ev_start (EV_A_ (W)w, ++forkcnt);
4500 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4501 forks [forkcnt - 1] = w;
4507 ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
4509 clear_pending (EV_A_ (W)w);
4510 if (expect_false (!ev_is_active (w)))
4516 int active = ev_active (w);
4518 forks [active - 1] = forks [--forkcnt];
4519 ev_active (forks [active - 1]) = active;
4522 ev_stop (EV_A_ (W)w);
4528 #if EV_CLEANUP_ENABLE
4530 ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4532 if (expect_false (ev_is_active (w)))
4537 ev_start (EV_A_ (W)w, ++cleanupcnt);
4538 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4539 cleanups [cleanupcnt - 1] = w;
4541 /* cleanup watchers should never keep a refcount on the loop */
4547 ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4549 clear_pending (EV_A_ (W)w);
4550 if (expect_false (!ev_is_active (w)))
4557 int active = ev_active (w);
4559 cleanups [active - 1] = cleanups [--cleanupcnt];
4560 ev_active (cleanups [active - 1]) = active;
4563 ev_stop (EV_A_ (W)w);
4571 ev_async_start (EV_P_ ev_async *w) EV_THROW
4573 if (expect_false (ev_is_active (w)))
4582 ev_start (EV_A_ (W)w, ++asynccnt);
4583 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4584 asyncs [asynccnt - 1] = w;
4590 ev_async_stop (EV_P_ ev_async *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 asyncs [active - 1] = asyncs [--asynccnt];
4602 ev_active (asyncs [active - 1]) = active;
4605 ev_stop (EV_A_ (W)w);
4611 ev_async_send (EV_P_ ev_async *w) EV_THROW
4614 evpipe_write (EV_A_ &async_pending);
4618 /*****************************************************************************/
4624 void (*cb)(int revents, void *arg);
4629 once_cb (EV_P_ struct ev_once *once, int revents)
4631 void (*cb)(int revents, void *arg) = once->cb;
4632 void *arg = once->arg;
4634 ev_io_stop (EV_A_ &once->io);
4635 ev_timer_stop (EV_A_ &once->to);
4642 once_cb_io (EV_P_ ev_io *w, int revents)
4644 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4646 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
4650 once_cb_to (EV_P_ ev_timer *w, int revents)
4652 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4654 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
4658 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
4660 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
4662 if (expect_false (!once))
4664 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
4671 ev_init (&once->io, once_cb_io);
4674 ev_io_set (&once->io, fd, events);
4675 ev_io_start (EV_A_ &once->io);
4678 ev_init (&once->to, once_cb_to);
4681 ev_timer_set (&once->to, timeout, 0.);
4682 ev_timer_start (EV_A_ &once->to);
4686 /*****************************************************************************/
4690 ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4693 ev_watcher_list *wl, *wn;
4695 if (types & (EV_IO | EV_EMBED))
4696 for (i = 0; i < anfdmax; ++i)
4697 for (wl = anfds [i].head; wl; )
4702 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4704 if (types & EV_EMBED)
4705 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4710 if (ev_cb ((ev_io *)wl) == infy_cb)
4714 if ((ev_io *)wl != &pipe_w)
4716 cb (EV_A_ EV_IO, wl);
4721 if (types & (EV_TIMER | EV_STAT))
4722 for (i = timercnt + HEAP0; i-- > HEAP0; )
4724 /*TODO: timer is not always active*/
4725 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4727 if (types & EV_STAT)
4728 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4732 if (types & EV_TIMER)
4733 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4735 #if EV_PERIODIC_ENABLE
4736 if (types & EV_PERIODIC)
4737 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4738 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4742 if (types & EV_IDLE)
4743 for (j = NUMPRI; j--; )
4744 for (i = idlecnt [j]; i--; )
4745 cb (EV_A_ EV_IDLE, idles [j][i]);
4749 if (types & EV_FORK)
4750 for (i = forkcnt; i--; )
4751 if (ev_cb (forks [i]) != embed_fork_cb)
4752 cb (EV_A_ EV_FORK, forks [i]);
4756 if (types & EV_ASYNC)
4757 for (i = asynccnt; i--; )
4758 cb (EV_A_ EV_ASYNC, asyncs [i]);
4761 #if EV_PREPARE_ENABLE
4762 if (types & EV_PREPARE)
4763 for (i = preparecnt; i--; )
4764 # if EV_EMBED_ENABLE
4765 if (ev_cb (prepares [i]) != embed_prepare_cb)
4767 cb (EV_A_ EV_PREPARE, prepares [i]);
4771 if (types & EV_CHECK)
4772 for (i = checkcnt; i--; )
4773 cb (EV_A_ EV_CHECK, checks [i]);
4776 #if EV_SIGNAL_ENABLE
4777 if (types & EV_SIGNAL)
4778 for (i = 0; i < EV_NSIG - 1; ++i)
4779 for (wl = signals [i].head; wl; )
4782 cb (EV_A_ EV_SIGNAL, wl);
4788 if (types & EV_CHILD)
4789 for (i = (EV_PID_HASHSIZE); i--; )
4790 for (wl = childs [i]; wl; )
4793 cb (EV_A_ EV_CHILD, wl);
4797 /* EV_STAT 0x00001000 /* stat data changed */
4798 /* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4803 #include "ev_wrap.h"