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
362 /* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
363 /* which makes programs even slower. might work on other unices, too. */
364 #if EV_USE_CLOCK_SYSCALL
365 # include <sys/syscall.h>
366 # ifdef SYS_clock_gettime
367 # define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
368 # undef EV_USE_MONOTONIC
369 # define EV_USE_MONOTONIC 1
371 # undef EV_USE_CLOCK_SYSCALL
372 # define EV_USE_CLOCK_SYSCALL 0
376 /* this block fixes any misconfiguration where we know we run into trouble otherwise */
379 /* AIX has a completely broken poll.h header */
381 # define EV_USE_POLL 0
384 #ifndef CLOCK_MONOTONIC
385 # undef EV_USE_MONOTONIC
386 # define EV_USE_MONOTONIC 0
389 #ifndef CLOCK_REALTIME
390 # undef EV_USE_REALTIME
391 # define EV_USE_REALTIME 0
395 # undef EV_USE_INOTIFY
396 # define EV_USE_INOTIFY 0
399 #if !EV_USE_NANOSLEEP
400 /* hp-ux has it in sys/time.h, which we unconditionally include above */
401 # if !defined _WIN32 && !defined __hpux
402 # include <sys/select.h>
407 # include <sys/statfs.h>
408 # include <sys/inotify.h>
409 /* some very old inotify.h headers don't have IN_DONT_FOLLOW */
410 # ifndef IN_DONT_FOLLOW
411 # undef EV_USE_INOTIFY
412 # define EV_USE_INOTIFY 0
417 /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
419 # ifndef EFD_NONBLOCK
420 # define EFD_NONBLOCK O_NONBLOCK
424 # define EFD_CLOEXEC O_CLOEXEC
426 # define EFD_CLOEXEC 02000000
429 EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
433 /* our minimum requirement is glibc 2.7 which has the stub, but not the header */
435 # ifndef SFD_NONBLOCK
436 # define SFD_NONBLOCK O_NONBLOCK
440 # define SFD_CLOEXEC O_CLOEXEC
442 # define SFD_CLOEXEC 02000000
445 EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
447 struct signalfd_siginfo
450 char pad[128 - sizeof (uint32_t)];
457 # define EV_FREQUENT_CHECK ev_verify (EV_A)
459 # define EV_FREQUENT_CHECK do { } while (0)
463 * This is used to work around floating point rounding problems.
464 * This value is good at least till the year 4000.
466 #define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
467 /*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
469 #define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
470 #define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
472 #define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
473 #define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
475 /* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
478 * libecb - http://software.schmorp.de/pkg/libecb
480 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
481 * Copyright (©) 2011 Emanuele Giaquinta
482 * All rights reserved.
484 * Redistribution and use in source and binary forms, with or without modifica-
485 * tion, are permitted provided that the following conditions are met:
487 * 1. Redistributions of source code must retain the above copyright notice,
488 * this list of conditions and the following disclaimer.
490 * 2. Redistributions in binary form must reproduce the above copyright
491 * notice, this list of conditions and the following disclaimer in the
492 * documentation and/or other materials provided with the distribution.
494 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
495 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
496 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
497 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
498 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
499 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
500 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
501 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
502 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
503 * OF THE POSSIBILITY OF SUCH DAMAGE.
509 /* 16 bits major, 16 bits minor */
510 #define ECB_VERSION 0x00010002
513 typedef signed char int8_t;
514 typedef unsigned char uint8_t;
515 typedef signed short int16_t;
516 typedef unsigned short uint16_t;
517 typedef signed int int32_t;
518 typedef unsigned int uint32_t;
520 typedef signed long long int64_t;
521 typedef unsigned long long uint64_t;
522 #else /* _MSC_VER || __BORLANDC__ */
523 typedef signed __int64 int64_t;
524 typedef unsigned __int64 uint64_t;
527 #define ECB_PTRSIZE 8
528 typedef uint64_t uintptr_t;
529 typedef int64_t intptr_t;
531 #define ECB_PTRSIZE 4
532 typedef uint32_t uintptr_t;
533 typedef int32_t intptr_t;
536 #include <inttypes.h>
537 #if UINTMAX_MAX > 0xffffffffU
538 #define ECB_PTRSIZE 8
540 #define ECB_PTRSIZE 4
544 /* many compilers define _GNUC_ to some versions but then only implement
545 * what their idiot authors think are the "more important" extensions,
546 * causing enormous grief in return for some better fake benchmark numbers.
548 * we try to detect these and simply assume they are not gcc - if they have
549 * an issue with that they should have done it right in the first place.
551 #ifndef ECB_GCC_VERSION
552 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
553 #define ECB_GCC_VERSION(major,minor) 0
555 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
559 #define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
560 #define ECB_C99 (__STDC_VERSION__ >= 199901L)
561 #define ECB_C11 (__STDC_VERSION__ >= 201112L)
562 #define ECB_CPP (__cplusplus+0)
563 #define ECB_CPP11 (__cplusplus >= 201103L)
566 #define ECB_EXTERN_C extern "C"
567 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
568 #define ECB_EXTERN_C_END }
570 #define ECB_EXTERN_C extern
571 #define ECB_EXTERN_C_BEG
572 #define ECB_EXTERN_C_END
575 /*****************************************************************************/
577 /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
578 /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
585 #define ECB_MEMORY_FENCE do { } while (0)
588 #ifndef ECB_MEMORY_FENCE
589 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
590 #if __i386 || __i386__
591 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
592 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
593 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
594 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
595 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
596 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
597 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
598 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
599 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
600 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
601 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
602 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
603 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
604 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
605 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
606 #elif __sparc || __sparc__
607 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
608 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
609 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
610 #elif defined __s390__ || defined __s390x__
611 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
612 #elif defined __mips__
613 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
614 #elif defined __alpha__
615 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
616 #elif defined __hppa__
617 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
618 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
619 #elif defined __ia64__
620 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
625 #ifndef ECB_MEMORY_FENCE
626 #if ECB_GCC_VERSION(4,7)
627 /* see comment below (stdatomic.h) about the C11 memory model. */
628 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
630 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
631 * without risking compile time errors with other compilers. We *could*
632 * define our own ecb_clang_has_feature, but I just can't be bothered to work
633 * around this shit time and again.
634 * #elif defined __clang && __has_feature (cxx_atomic)
635 * // see comment below (stdatomic.h) about the C11 memory model.
636 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
639 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
640 #define ECB_MEMORY_FENCE __sync_synchronize ()
641 #elif _MSC_VER >= 1400 /* VC++ 2005 */
642 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
643 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
644 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
645 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
648 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
649 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
650 #include <mbarrier.h>
651 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
652 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
653 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
655 #define ECB_MEMORY_FENCE __sync ()
659 #ifndef ECB_MEMORY_FENCE
660 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
661 /* we assume that these memory fences work on all variables/all memory accesses, */
662 /* not just C11 atomics and atomic accesses */
663 #include <stdatomic.h>
664 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
665 /* any fence other than seq_cst, which isn't very efficient for us. */
666 /* Why that is, we don't know - either the C11 memory model is quite useless */
667 /* for most usages, or gcc and clang have a bug */
668 /* I *currently* lean towards the latter, and inefficiently implement */
669 /* all three of ecb's fences as a seq_cst fence */
670 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
674 #ifndef ECB_MEMORY_FENCE
675 #if !ECB_AVOID_PTHREADS
677 * if you get undefined symbol references to pthread_mutex_lock,
678 * or failure to find pthread.h, then you should implement
679 * the ECB_MEMORY_FENCE operations for your cpu/compiler
680 * OR provide pthread.h and link against the posix thread library
684 #define ECB_NEEDS_PTHREADS 1
685 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
687 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
688 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
692 #if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
693 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
696 #if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
697 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
700 /*****************************************************************************/
703 #define ecb_inline static inline
704 #elif ECB_GCC_VERSION(2,5)
705 #define ecb_inline static __inline__
707 #define ecb_inline static inline
709 #define ecb_inline static
712 #if ECB_GCC_VERSION(3,3)
713 #define ecb_restrict __restrict__
715 #define ecb_restrict restrict
720 typedef int ecb_bool;
722 #define ECB_CONCAT_(a, b) a ## b
723 #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
724 #define ECB_STRINGIFY_(a) # a
725 #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
727 #define ecb_function_ ecb_inline
729 #if ECB_GCC_VERSION(3,1)
730 #define ecb_attribute(attrlist) __attribute__(attrlist)
731 #define ecb_is_constant(expr) __builtin_constant_p (expr)
732 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
733 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
735 #define ecb_attribute(attrlist)
736 #define ecb_is_constant(expr) 0
737 #define ecb_expect(expr,value) (expr)
738 #define ecb_prefetch(addr,rw,locality)
741 /* no emulation for ecb_decltype */
742 #if ECB_GCC_VERSION(4,5)
743 #define ecb_decltype(x) __decltype(x)
744 #elif ECB_GCC_VERSION(3,0)
745 #define ecb_decltype(x) __typeof(x)
748 #define ecb_noinline ecb_attribute ((__noinline__))
749 #define ecb_unused ecb_attribute ((__unused__))
750 #define ecb_const ecb_attribute ((__const__))
751 #define ecb_pure ecb_attribute ((__pure__))
754 #define ecb_noreturn _Noreturn
756 #define ecb_noreturn ecb_attribute ((__noreturn__))
759 #if ECB_GCC_VERSION(4,3)
760 #define ecb_artificial ecb_attribute ((__artificial__))
761 #define ecb_hot ecb_attribute ((__hot__))
762 #define ecb_cold ecb_attribute ((__cold__))
764 #define ecb_artificial
769 /* put around conditional expressions if you are very sure that the */
770 /* expression is mostly true or mostly false. note that these return */
771 /* booleans, not the expression. */
772 #define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
773 #define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
774 /* for compatibility to the rest of the world */
775 #define ecb_likely(expr) ecb_expect_true (expr)
776 #define ecb_unlikely(expr) ecb_expect_false (expr)
778 /* count trailing zero bits and count # of one bits */
779 #if ECB_GCC_VERSION(3,4)
780 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
781 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
782 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
783 #define ecb_ctz32(x) __builtin_ctz (x)
784 #define ecb_ctz64(x) __builtin_ctzll (x)
785 #define ecb_popcount32(x) __builtin_popcount (x)
788 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
790 ecb_ctz32 (uint32_t x)
794 x &= ~x + 1; /* this isolates the lowest bit */
796 #if ECB_branchless_on_i386
797 r += !!(x & 0xaaaaaaaa) << 0;
798 r += !!(x & 0xcccccccc) << 1;
799 r += !!(x & 0xf0f0f0f0) << 2;
800 r += !!(x & 0xff00ff00) << 3;
801 r += !!(x & 0xffff0000) << 4;
803 if (x & 0xaaaaaaaa) r += 1;
804 if (x & 0xcccccccc) r += 2;
805 if (x & 0xf0f0f0f0) r += 4;
806 if (x & 0xff00ff00) r += 8;
807 if (x & 0xffff0000) r += 16;
813 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
815 ecb_ctz64 (uint64_t x)
817 int shift = x & 0xffffffffU ? 0 : 32;
818 return ecb_ctz32 (x >> shift) + shift;
821 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
823 ecb_popcount32 (uint32_t x)
825 x -= (x >> 1) & 0x55555555;
826 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
827 x = ((x >> 4) + x) & 0x0f0f0f0f;
833 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
834 ecb_function_ int ecb_ld32 (uint32_t x)
838 if (x >> 16) { x >>= 16; r += 16; }
839 if (x >> 8) { x >>= 8; r += 8; }
840 if (x >> 4) { x >>= 4; r += 4; }
841 if (x >> 2) { x >>= 2; r += 2; }
842 if (x >> 1) { r += 1; }
847 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
848 ecb_function_ int ecb_ld64 (uint64_t x)
852 if (x >> 32) { x >>= 32; r += 32; }
854 return r + ecb_ld32 (x);
858 ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
859 ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
860 ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
861 ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
863 ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
864 ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
866 return ( (x * 0x0802U & 0x22110U)
867 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
870 ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
871 ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
873 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
874 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
875 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
876 x = ( x >> 8 ) | ( x << 8);
881 ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
882 ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
884 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
885 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
886 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
887 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
888 x = ( x >> 16 ) | ( x << 16);
893 /* popcount64 is only available on 64 bit cpus as gcc builtin */
894 /* so for this version we are lazy */
895 ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
897 ecb_popcount64 (uint64_t x)
899 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
902 ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
903 ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
904 ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
905 ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
906 ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
907 ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
908 ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
909 ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
911 ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
912 ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
913 ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
914 ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
915 ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
916 ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
917 ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
918 ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
920 #if ECB_GCC_VERSION(4,3)
921 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
922 #define ecb_bswap32(x) __builtin_bswap32 (x)
923 #define ecb_bswap64(x) __builtin_bswap64 (x)
925 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
926 ecb_function_ uint16_t
927 ecb_bswap16 (uint16_t x)
929 return ecb_rotl16 (x, 8);
932 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
933 ecb_function_ uint32_t
934 ecb_bswap32 (uint32_t x)
936 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
939 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
940 ecb_function_ uint64_t
941 ecb_bswap64 (uint64_t x)
943 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
947 #if ECB_GCC_VERSION(4,5)
948 #define ecb_unreachable() __builtin_unreachable ()
950 /* this seems to work fine, but gcc always emits a warning for it :/ */
951 ecb_inline void ecb_unreachable (void) ecb_noreturn;
952 ecb_inline void ecb_unreachable (void) { }
955 /* try to tell the compiler that some condition is definitely true */
956 #define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
958 ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
959 ecb_inline unsigned char
960 ecb_byteorder_helper (void)
962 /* the union code still generates code under pressure in gcc, */
963 /* but less than using pointers, and always seems to */
964 /* successfully return a constant. */
965 /* the reason why we have this horrible preprocessor mess */
966 /* is to avoid it in all cases, at least on common architectures */
967 /* or when using a recent enough gcc version (>= 4.6) */
968 #if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
970 #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
972 #elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
979 } u = { 0x11223344 };
984 ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
985 ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
986 ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
987 ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
989 #if ECB_GCC_VERSION(3,0) || ECB_C99
990 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
992 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
997 static inline T ecb_div_rd (T val, T div)
999 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1001 template<typename T>
1002 static inline T ecb_div_ru (T val, T div)
1004 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1007 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1008 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1011 #if ecb_cplusplus_does_not_suck
1012 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1013 template<typename T, int N>
1014 static inline int ecb_array_length (const T (&arr)[N])
1019 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1022 /*******************************************************************************/
1023 /* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1025 /* basically, everything uses "ieee pure-endian" floating point numbers */
1026 /* the only noteworthy exception is ancient armle, which uses order 43218765 */
1028 || __i386 || __i386__ \
1029 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1030 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1031 || defined __arm__ && defined __ARM_EABI__ \
1032 || defined __s390__ || defined __s390x__ \
1033 || defined __mips__ \
1034 || defined __alpha__ \
1035 || defined __hppa__ \
1036 || defined __ia64__ \
1037 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64
1039 #include <string.h> /* for memcpy */
1042 #include <math.h> /* for frexp*, ldexp* */
1047 /* convert a float to ieee single/binary32 */
1048 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1049 ecb_function_ uint32_t
1050 ecb_float_to_binary32 (float x)
1057 /* slow emulation, works for anything but -0 */
1061 if (x == 0e0f ) return 0x00000000U;
1062 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1063 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1064 if (x != x ) return 0x7fbfffffU;
1066 m = frexpf (x, &e) * 0x1000000U;
1068 r = m & 0x80000000U;
1080 r |= (e + 126) << 23;
1087 /* converts an ieee single/binary32 to a float */
1088 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1090 ecb_binary32_to_float (uint32_t x)
1097 /* emulation, only works for normals and subnormals and +0 */
1099 int e = (x >> 23) & 0xffU;
1108 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1109 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1117 /* convert a double to ieee double/binary64 */
1118 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1119 ecb_function_ uint64_t
1120 ecb_double_to_binary64 (double x)
1127 /* slow emulation, works for anything but -0 */
1131 if (x == 0e0 ) return 0x0000000000000000U;
1132 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1133 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1134 if (x != x ) return 0X7ff7ffffffffffffU;
1136 m = frexp (x, &e) * 0x20000000000000U;
1138 r = m & 0x8000000000000000;;
1145 m &= 0x1fffffffffffffU;
1150 r |= ((uint64_t)(e + 1022)) << 52;
1151 r |= m & 0xfffffffffffffU;
1157 /* converts an ieee double/binary64 to a double */
1158 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1159 ecb_function_ double
1160 ecb_binary64_to_double (uint64_t x)
1167 /* emulation, only works for normals and subnormals and +0 */
1169 int e = (x >> 52) & 0x7ffU;
1171 x &= 0xfffffffffffffU;
1174 x |= 0x10000000000000U;
1178 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1179 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1193 #if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1194 /* if your architecture doesn't need memory fences, e.g. because it is
1195 * single-cpu/core, or if you use libev in a project that doesn't use libev
1196 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1197 * libev, in which cases the memory fences become nops.
1198 * alternatively, you can remove this #error and link against libpthread,
1199 * which will then provide the memory fences.
1201 # error "memory fences not defined for your architecture, please report"
1204 #ifndef ECB_MEMORY_FENCE
1205 # define ECB_MEMORY_FENCE do { } while (0)
1206 # define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1207 # define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1210 #define expect_false(cond) ecb_expect_false (cond)
1211 #define expect_true(cond) ecb_expect_true (cond)
1212 #define noinline ecb_noinline
1214 #define inline_size ecb_inline
1217 # define inline_speed ecb_inline
1219 # define inline_speed static noinline
1222 #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1224 #if EV_MINPRI == EV_MAXPRI
1225 # define ABSPRI(w) (((W)w), 0)
1227 # define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1230 #define EMPTY /* required for microsofts broken pseudo-c compiler */
1231 #define EMPTY2(a,b) /* used to suppress some warnings */
1233 typedef ev_watcher *W;
1234 typedef ev_watcher_list *WL;
1235 typedef ev_watcher_time *WT;
1237 #define ev_active(w) ((W)(w))->active
1238 #define ev_at(w) ((WT)(w))->at
1241 /* sig_atomic_t is used to avoid per-thread variables or locking but still */
1242 /* giving it a reasonably high chance of working on typical architectures */
1243 static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1246 #if EV_USE_MONOTONIC
1247 static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1250 #ifndef EV_FD_TO_WIN32_HANDLE
1251 # define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1253 #ifndef EV_WIN32_HANDLE_TO_FD
1254 # define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1256 #ifndef EV_WIN32_CLOSE_FD
1257 # define EV_WIN32_CLOSE_FD(fd) close (fd)
1261 # include "ev_win32.c"
1264 /*****************************************************************************/
1266 /* define a suitable floor function (only used by periodics atm) */
1270 # define ev_floor(v) floor (v)
1275 /* a floor() replacement function, should be independent of ev_tstamp type */
1276 static ev_tstamp noinline
1277 ev_floor (ev_tstamp v)
1279 /* the choice of shift factor is not terribly important */
1280 #if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1281 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1283 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1286 /* argument too large for an unsigned long? */
1287 if (expect_false (v >= shift))
1292 return v; /* very large number */
1294 f = shift * ev_floor (v * (1. / shift));
1295 return f + ev_floor (v - f);
1298 /* special treatment for negative args? */
1299 if (expect_false (v < 0.))
1301 ev_tstamp f = -ev_floor (-v);
1303 return f - (f == v ? 0 : 1);
1306 /* fits into an unsigned long */
1307 return (unsigned long)v;
1312 /*****************************************************************************/
1315 # include <sys/utsname.h>
1318 static unsigned int noinline ecb_cold
1319 ev_linux_version (void)
1325 char *p = buf.release;
1330 for (i = 3+1; --i; )
1336 if (*p >= '0' && *p <= '9')
1337 c = c * 10 + *p++ - '0';
1354 /*****************************************************************************/
1357 static void noinline ecb_cold
1358 ev_printerr (const char *msg)
1360 write (STDERR_FILENO, msg, strlen (msg));
1364 static void (*syserr_cb)(const char *msg) EV_THROW;
1367 ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
1372 static void noinline ecb_cold
1373 ev_syserr (const char *msg)
1376 msg = "(libev) system error";
1385 ev_printerr (strerror (errno));
1395 ev_realloc_emul (void *ptr, long size) EV_THROW
1397 /* some systems, notably openbsd and darwin, fail to properly
1398 * implement realloc (x, 0) (as required by both ansi c-89 and
1399 * the single unix specification, so work around them here.
1400 * recently, also (at least) fedora and debian started breaking it,
1401 * despite documenting it otherwise.
1405 return realloc (ptr, size);
1411 static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
1414 ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
1420 ev_realloc (void *ptr, long size)
1422 ptr = alloc (ptr, size);
1427 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1429 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1437 #define ev_malloc(size) ev_realloc (0, (size))
1438 #define ev_free(ptr) ev_realloc ((ptr), 0)
1440 /*****************************************************************************/
1442 /* set in reify when reification needed */
1443 #define EV_ANFD_REIFY 1
1445 /* file descriptor info structure */
1449 unsigned char events; /* the events watched for */
1450 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1451 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
1452 unsigned char unused;
1454 unsigned int egen; /* generation counter to counter epoll bugs */
1456 #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1464 /* stores the pending event set for a given watcher */
1468 int events; /* the pending event set for the given watcher */
1472 /* hash table entry per inotify-id */
1480 #if EV_HEAP_CACHE_AT
1481 /* a heap element */
1487 #define ANHE_w(he) (he).w /* access watcher, read-write */
1488 #define ANHE_at(he) (he).at /* access cached at, read-only */
1489 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1491 /* a heap element */
1494 #define ANHE_w(he) (he)
1495 #define ANHE_at(he) (he)->at
1496 #define ANHE_at_cache(he)
1503 ev_tstamp ev_rt_now;
1504 #define ev_rt_now ((loop)->ev_rt_now)
1505 #define VAR(name,decl) decl;
1506 #include "ev_vars.h"
1509 #include "ev_wrap.h"
1511 static struct ev_loop default_loop_struct;
1512 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
1516 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
1517 #define VAR(name,decl) static decl;
1518 #include "ev_vars.h"
1521 static int ev_default_loop_ptr;
1526 # define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1527 # define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1528 # define EV_INVOKE_PENDING invoke_cb (EV_A)
1530 # define EV_RELEASE_CB (void)0
1531 # define EV_ACQUIRE_CB (void)0
1532 # define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1535 #define EVBREAK_RECURSE 0x80
1537 /*****************************************************************************/
1539 #ifndef EV_HAVE_EV_TIME
1541 ev_time (void) EV_THROW
1544 if (expect_true (have_realtime))
1547 clock_gettime (CLOCK_REALTIME, &ts);
1548 return ts.tv_sec + ts.tv_nsec * 1e-9;
1553 gettimeofday (&tv, 0);
1554 return tv.tv_sec + tv.tv_usec * 1e-6;
1558 inline_size ev_tstamp
1561 #if EV_USE_MONOTONIC
1562 if (expect_true (have_monotonic))
1565 clock_gettime (CLOCK_MONOTONIC, &ts);
1566 return ts.tv_sec + ts.tv_nsec * 1e-9;
1575 ev_now (EV_P) EV_THROW
1582 ev_sleep (ev_tstamp delay) EV_THROW
1586 #if EV_USE_NANOSLEEP
1589 EV_TS_SET (ts, delay);
1591 #elif defined _WIN32
1592 Sleep ((unsigned long)(delay * 1e3));
1596 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1597 /* something not guaranteed by newer posix versions, but guaranteed */
1599 EV_TV_SET (tv, delay);
1600 select (0, 0, 0, 0, &tv);
1605 /*****************************************************************************/
1607 #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1609 /* find a suitable new size for the given array, */
1610 /* hopefully by rounding to a nice-to-malloc size */
1612 array_nextsize (int elem, int cur, int cnt)
1620 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
1621 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
1624 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
1625 ncur = ncur - sizeof (void *) * 4;
1632 static void * noinline ecb_cold
1633 array_realloc (int elem, void *base, int *cur, int cnt)
1635 *cur = array_nextsize (elem, *cur, cnt);
1636 return ev_realloc (base, elem * *cur);
1639 #define array_init_zero(base,count) \
1640 memset ((void *)(base), 0, sizeof (*(base)) * (count))
1642 #define array_needsize(type,base,cur,cnt,init) \
1643 if (expect_false ((cnt) > (cur))) \
1645 int ecb_unused ocur_ = (cur); \
1646 (base) = (type *)array_realloc \
1647 (sizeof (type), (base), &(cur), (cnt)); \
1648 init ((base) + (ocur_), (cur) - ocur_); \
1652 #define array_slim(type,stem) \
1653 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
1655 stem ## max = array_roundsize (stem ## cnt >> 1); \
1656 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
1657 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
1661 #define array_free(stem, idx) \
1662 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
1664 /*****************************************************************************/
1666 /* dummy callback for pending events */
1667 static void noinline
1668 pendingcb (EV_P_ ev_prepare *w, int revents)
1673 ev_feed_event (EV_P_ void *w, int revents) EV_THROW
1676 int pri = ABSPRI (w_);
1678 if (expect_false (w_->pending))
1679 pendings [pri][w_->pending - 1].events |= revents;
1682 w_->pending = ++pendingcnt [pri];
1683 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1684 pendings [pri][w_->pending - 1].w = w_;
1685 pendings [pri][w_->pending - 1].events = revents;
1688 pendingpri = NUMPRI - 1;
1692 feed_reverse (EV_P_ W w)
1694 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1695 rfeeds [rfeedcnt++] = w;
1699 feed_reverse_done (EV_P_ int revents)
1702 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1707 queue_events (EV_P_ W *events, int eventcnt, int type)
1711 for (i = 0; i < eventcnt; ++i)
1712 ev_feed_event (EV_A_ events [i], type);
1715 /*****************************************************************************/
1718 fd_event_nocheck (EV_P_ int fd, int revents)
1720 ANFD *anfd = anfds + fd;
1723 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1725 int ev = w->events & revents;
1728 ev_feed_event (EV_A_ (W)w, ev);
1732 /* do not submit kernel events for fds that have reify set */
1733 /* because that means they changed while we were polling for new events */
1735 fd_event (EV_P_ int fd, int revents)
1737 ANFD *anfd = anfds + fd;
1739 if (expect_true (!anfd->reify))
1740 fd_event_nocheck (EV_A_ fd, revents);
1744 ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
1746 if (fd >= 0 && fd < anfdmax)
1747 fd_event_nocheck (EV_A_ fd, revents);
1750 /* make sure the external fd watch events are in-sync */
1751 /* with the kernel/libev internal state */
1757 #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1758 for (i = 0; i < fdchangecnt; ++i)
1760 int fd = fdchanges [i];
1761 ANFD *anfd = anfds + fd;
1763 if (anfd->reify & EV__IOFDSET && anfd->head)
1765 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1767 if (handle != anfd->handle)
1771 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1773 /* handle changed, but fd didn't - we need to do it in two steps */
1774 backend_modify (EV_A_ fd, anfd->events, 0);
1776 anfd->handle = handle;
1782 for (i = 0; i < fdchangecnt; ++i)
1784 int fd = fdchanges [i];
1785 ANFD *anfd = anfds + fd;
1788 unsigned char o_events = anfd->events;
1789 unsigned char o_reify = anfd->reify;
1793 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1797 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1798 anfd->events |= (unsigned char)w->events;
1800 if (o_events != anfd->events)
1801 o_reify = EV__IOFDSET; /* actually |= */
1804 if (o_reify & EV__IOFDSET)
1805 backend_modify (EV_A_ fd, o_events, anfd->events);
1811 /* something about the given fd changed */
1813 fd_change (EV_P_ int fd, int flags)
1815 unsigned char reify = anfds [fd].reify;
1816 anfds [fd].reify |= flags;
1818 if (expect_true (!reify))
1821 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
1822 fdchanges [fdchangecnt - 1] = fd;
1826 /* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1827 inline_speed void ecb_cold
1828 fd_kill (EV_P_ int fd)
1832 while ((w = (ev_io *)anfds [fd].head))
1834 ev_io_stop (EV_A_ w);
1835 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1839 /* check whether the given fd is actually valid, for error recovery */
1840 inline_size int ecb_cold
1844 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1846 return fcntl (fd, F_GETFD) != -1;
1850 /* called on EBADF to verify fds */
1851 static void noinline ecb_cold
1856 for (fd = 0; fd < anfdmax; ++fd)
1857 if (anfds [fd].events)
1858 if (!fd_valid (fd) && errno == EBADF)
1862 /* called on ENOMEM in select/poll to kill some fds and retry */
1863 static void noinline ecb_cold
1868 for (fd = anfdmax; fd--; )
1869 if (anfds [fd].events)
1876 /* usually called after fork if backend needs to re-arm all fds from scratch */
1877 static void noinline
1882 for (fd = 0; fd < anfdmax; ++fd)
1883 if (anfds [fd].events)
1885 anfds [fd].events = 0;
1886 anfds [fd].emask = 0;
1887 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1891 /* used to prepare libev internal fd's */
1892 /* this is not fork-safe */
1897 unsigned long arg = 1;
1898 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1900 fcntl (fd, F_SETFD, FD_CLOEXEC);
1901 fcntl (fd, F_SETFL, O_NONBLOCK);
1905 /*****************************************************************************/
1908 * the heap functions want a real array index. array index 0 is guaranteed to not
1909 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1910 * the branching factor of the d-tree.
1914 * at the moment we allow libev the luxury of two heaps,
1915 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1916 * which is more cache-efficient.
1917 * the difference is about 5% with 50000+ watchers.
1922 #define HEAP0 (DHEAP - 1) /* index of first element in heap */
1923 #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1924 #define UPHEAP_DONE(p,k) ((p) == (k))
1926 /* away from the root */
1928 downheap (ANHE *heap, int N, int k)
1931 ANHE *E = heap + N + HEAP0;
1937 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1939 /* find minimum child */
1940 if (expect_true (pos + DHEAP - 1 < E))
1942 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1943 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1944 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1945 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1949 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1950 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1951 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1952 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1957 if (ANHE_at (he) <= minat)
1961 ev_active (ANHE_w (*minpos)) = k;
1967 ev_active (ANHE_w (he)) = k;
1973 #define HPARENT(k) ((k) >> 1)
1974 #define UPHEAP_DONE(p,k) (!(p))
1976 /* away from the root */
1978 downheap (ANHE *heap, int N, int k)
1989 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1992 if (ANHE_at (he) <= ANHE_at (heap [c]))
1995 heap [k] = heap [c];
1996 ev_active (ANHE_w (heap [k])) = k;
2002 ev_active (ANHE_w (he)) = k;
2006 /* towards the root */
2008 upheap (ANHE *heap, int k)
2014 int p = HPARENT (k);
2016 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
2019 heap [k] = heap [p];
2020 ev_active (ANHE_w (heap [k])) = k;
2025 ev_active (ANHE_w (he)) = k;
2028 /* move an element suitably so it is in a correct place */
2030 adjustheap (ANHE *heap, int N, int k)
2032 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
2035 downheap (heap, N, k);
2038 /* rebuild the heap: this function is used only once and executed rarely */
2040 reheap (ANHE *heap, int N)
2044 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
2045 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
2046 for (i = 0; i < N; ++i)
2047 upheap (heap, i + HEAP0);
2050 /*****************************************************************************/
2052 /* associate signal watchers to a signal signal */
2055 EV_ATOMIC_T pending;
2062 static ANSIG signals [EV_NSIG - 1];
2064 /*****************************************************************************/
2066 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2068 static void noinline ecb_cold
2071 if (!ev_is_active (&pipe_w))
2077 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2078 if (fds [1] < 0 && errno == EINVAL)
2079 fds [1] = eventfd (0, 0);
2085 ev_syserr ("(libev) error creating signal/async pipe");
2087 fd_intern (fds [0]);
2090 fd_intern (fds [1]);
2092 evpipe [0] = fds [0];
2095 evpipe [1] = fds [1]; /* first call, set write fd */
2098 /* on subsequent calls, do not change evpipe [1] */
2099 /* so that evpipe_write can always rely on its value. */
2100 /* this branch does not do anything sensible on windows, */
2101 /* so must not be executed on windows */
2103 dup2 (fds [1], evpipe [1]);
2107 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2108 ev_io_start (EV_A_ &pipe_w);
2109 ev_unref (EV_A); /* watcher should not keep loop alive */
2114 evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2116 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2118 if (expect_true (*flag))
2122 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2124 pipe_write_skipped = 1;
2126 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2128 if (pipe_write_wanted)
2132 pipe_write_skipped = 0;
2133 ECB_MEMORY_FENCE_RELEASE;
2135 old_errno = errno; /* save errno because write will clobber it */
2140 uint64_t counter = 1;
2141 write (evpipe [1], &counter, sizeof (uint64_t));
2151 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2153 write (evpipe [1], &(evpipe [1]), 1);
2161 /* called whenever the libev signal pipe */
2162 /* got some events (signal, async) */
2164 pipecb (EV_P_ ev_io *iow, int revents)
2168 if (revents & EV_READ)
2174 read (evpipe [1], &counter, sizeof (uint64_t));
2185 buf.len = sizeof (dummy);
2186 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2188 read (evpipe [0], &dummy, sizeof (dummy));
2193 pipe_write_skipped = 0;
2195 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2197 #if EV_SIGNAL_ENABLE
2204 for (i = EV_NSIG - 1; i--; )
2205 if (expect_false (signals [i].pending))
2206 ev_feed_signal_event (EV_A_ i + 1);
2217 for (i = asynccnt; i--; )
2218 if (asyncs [i]->sent)
2220 asyncs [i]->sent = 0;
2221 ECB_MEMORY_FENCE_RELEASE;
2222 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
2228 /*****************************************************************************/
2231 ev_feed_signal (int signum) EV_THROW
2234 ECB_MEMORY_FENCE_ACQUIRE;
2235 EV_P = signals [signum - 1].loop;
2241 signals [signum - 1].pending = 1;
2242 evpipe_write (EV_A_ &sig_pending);
2246 ev_sighandler (int signum)
2249 signal (signum, ev_sighandler);
2252 ev_feed_signal (signum);
2256 ev_feed_signal_event (EV_P_ int signum) EV_THROW
2260 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2266 /* it is permissible to try to feed a signal to the wrong loop */
2267 /* or, likely more useful, feeding a signal nobody is waiting for */
2269 if (expect_false (signals [signum].loop != EV_A))
2273 signals [signum].pending = 0;
2274 ECB_MEMORY_FENCE_RELEASE;
2276 for (w = signals [signum].head; w; w = w->next)
2277 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2282 sigfdcb (EV_P_ ev_io *iow, int revents)
2284 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2288 ssize_t res = read (sigfd, si, sizeof (si));
2290 /* not ISO-C, as res might be -1, but works with SuS */
2291 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2292 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2294 if (res < (ssize_t)sizeof (si))
2302 /*****************************************************************************/
2305 static WL childs [EV_PID_HASHSIZE];
2307 static ev_signal childev;
2309 #ifndef WIFCONTINUED
2310 # define WIFCONTINUED(status) 0
2313 /* handle a single child status event */
2315 child_reap (EV_P_ int chain, int pid, int status)
2318 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
2320 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2322 if ((w->pid == pid || !w->pid)
2323 && (!traced || (w->flags & 1)))
2325 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
2327 w->rstatus = status;
2328 ev_feed_event (EV_A_ (W)w, EV_CHILD);
2334 # define WCONTINUED 0
2337 /* called on sigchld etc., calls waitpid */
2339 childcb (EV_P_ ev_signal *sw, int revents)
2343 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
2344 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
2347 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
2350 /* make sure we are called again until all children have been reaped */
2351 /* we need to do it this way so that the callback gets called before we continue */
2352 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
2354 child_reap (EV_A_ pid, pid, status);
2355 if ((EV_PID_HASHSIZE) > 1)
2356 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
2361 /*****************************************************************************/
2364 # include "ev_iocp.c"
2367 # include "ev_port.c"
2370 # include "ev_kqueue.c"
2373 # include "ev_epoll.c"
2376 # include "ev_poll.c"
2379 # include "ev_select.c"
2383 ev_version_major (void) EV_THROW
2385 return EV_VERSION_MAJOR;
2389 ev_version_minor (void) EV_THROW
2391 return EV_VERSION_MINOR;
2394 /* return true if we are running with elevated privileges and should ignore env variables */
2395 int inline_size ecb_cold
2396 enable_secure (void)
2401 return getuid () != geteuid ()
2402 || getgid () != getegid ();
2406 unsigned int ecb_cold
2407 ev_supported_backends (void) EV_THROW
2409 unsigned int flags = 0;
2411 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2412 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
2413 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2414 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2415 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2420 unsigned int ecb_cold
2421 ev_recommended_backends (void) EV_THROW
2423 unsigned int flags = ev_supported_backends ();
2426 /* kqueue is borked on everything but netbsd apparently */
2427 /* it usually doesn't work correctly on anything but sockets and pipes */
2428 flags &= ~EVBACKEND_KQUEUE;
2431 /* only select works correctly on that "unix-certified" platform */
2432 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2433 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2436 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2442 unsigned int ecb_cold
2443 ev_embeddable_backends (void) EV_THROW
2445 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2447 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2448 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2449 flags &= ~EVBACKEND_EPOLL;
2455 ev_backend (EV_P) EV_THROW
2462 ev_iteration (EV_P) EV_THROW
2468 ev_depth (EV_P) EV_THROW
2474 ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2476 io_blocktime = interval;
2480 ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2482 timeout_blocktime = interval;
2486 ev_set_userdata (EV_P_ void *data) EV_THROW
2492 ev_userdata (EV_P) EV_THROW
2498 ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
2500 invoke_cb = invoke_pending_cb;
2504 ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2506 release_cb = release;
2507 acquire_cb = acquire;
2511 /* initialise a loop structure, must be zero-initialised */
2512 static void noinline ecb_cold
2513 loop_init (EV_P_ unsigned int flags) EV_THROW
2524 if (!clock_gettime (CLOCK_REALTIME, &ts))
2529 #if EV_USE_MONOTONIC
2530 if (!have_monotonic)
2534 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
2539 /* pid check not overridable via env */
2541 if (flags & EVFLAG_FORKCHECK)
2545 if (!(flags & EVFLAG_NOENV)
2546 && !enable_secure ()
2547 && getenv ("LIBEV_FLAGS"))
2548 flags = atoi (getenv ("LIBEV_FLAGS"));
2550 ev_rt_now = ev_time ();
2551 mn_now = get_clock ();
2553 rtmn_diff = ev_rt_now - mn_now;
2555 invoke_cb = ev_invoke_pending;
2559 timeout_blocktime = 0.;
2566 pipe_write_skipped = 0;
2567 pipe_write_wanted = 0;
2571 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2574 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2577 if (!(flags & EVBACKEND_MASK))
2578 flags |= ev_recommended_backends ();
2581 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2584 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
2587 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
2590 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
2593 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
2596 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
2599 ev_prepare_init (&pending_w, pendingcb);
2601 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2602 ev_init (&pipe_w, pipecb);
2603 ev_set_priority (&pipe_w, EV_MAXPRI);
2608 /* free up a loop structure */
2610 ev_loop_destroy (EV_P)
2615 /* mimic free (0) */
2620 #if EV_CLEANUP_ENABLE
2621 /* queue cleanup watchers (and execute them) */
2622 if (expect_false (cleanupcnt))
2624 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2630 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2632 ev_ref (EV_A); /* child watcher */
2633 ev_signal_stop (EV_A_ &childev);
2637 if (ev_is_active (&pipe_w))
2640 /*ev_io_stop (EV_A_ &pipe_w);*/
2642 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2643 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2647 if (ev_is_active (&sigfd_w))
2656 if (backend_fd >= 0)
2660 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2663 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
2666 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
2669 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
2672 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
2675 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
2678 for (i = NUMPRI; i--; )
2680 array_free (pending, [i]);
2682 array_free (idle, [i]);
2686 ev_free (anfds); anfds = 0; anfdmax = 0;
2688 /* have to use the microsoft-never-gets-it-right macro */
2689 array_free (rfeed, EMPTY);
2690 array_free (fdchange, EMPTY);
2691 array_free (timer, EMPTY);
2692 #if EV_PERIODIC_ENABLE
2693 array_free (periodic, EMPTY);
2696 array_free (fork, EMPTY);
2698 #if EV_CLEANUP_ENABLE
2699 array_free (cleanup, EMPTY);
2701 array_free (prepare, EMPTY);
2702 array_free (check, EMPTY);
2704 array_free (async, EMPTY);
2710 if (ev_is_default_loop (EV_A))
2712 ev_default_loop_ptr = 0;
2720 inline_size void infy_fork (EV_P);
2727 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
2730 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
2733 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
2739 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2740 if (ev_is_active (&pipe_w))
2742 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2745 ev_io_stop (EV_A_ &pipe_w);
2747 if (evpipe [0] >= 0)
2748 EV_WIN32_CLOSE_FD (evpipe [0]);
2751 /* iterate over everything, in case we missed something before */
2752 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2761 struct ev_loop * ecb_cold
2762 ev_loop_new (unsigned int flags) EV_THROW
2764 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2766 memset (EV_A, 0, sizeof (struct ev_loop));
2767 loop_init (EV_A_ flags);
2769 if (ev_backend (EV_A))
2776 #endif /* multiplicity */
2779 static void noinline ecb_cold
2780 verify_watcher (EV_P_ W w)
2782 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2785 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2788 static void noinline ecb_cold
2789 verify_heap (EV_P_ ANHE *heap, int N)
2793 for (i = HEAP0; i < N + HEAP0; ++i)
2795 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2796 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2797 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2799 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2803 static void noinline ecb_cold
2804 array_verify (EV_P_ W *ws, int cnt)
2808 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2809 verify_watcher (EV_A_ ws [cnt]);
2816 ev_verify (EV_P) EV_THROW
2822 assert (activecnt >= -1);
2824 assert (fdchangemax >= fdchangecnt);
2825 for (i = 0; i < fdchangecnt; ++i)
2826 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2828 assert (anfdmax >= 0);
2829 for (i = 0; i < anfdmax; ++i)
2833 for (w = w2 = anfds [i].head; w; w = w->next)
2835 verify_watcher (EV_A_ (W)w);
2839 assert (("libev: io watcher list contains a loop", w != w2));
2843 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2844 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2848 assert (timermax >= timercnt);
2849 verify_heap (EV_A_ timers, timercnt);
2851 #if EV_PERIODIC_ENABLE
2852 assert (periodicmax >= periodiccnt);
2853 verify_heap (EV_A_ periodics, periodiccnt);
2856 for (i = NUMPRI; i--; )
2858 assert (pendingmax [i] >= pendingcnt [i]);
2860 assert (idleall >= 0);
2861 assert (idlemax [i] >= idlecnt [i]);
2862 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2867 assert (forkmax >= forkcnt);
2868 array_verify (EV_A_ (W *)forks, forkcnt);
2871 #if EV_CLEANUP_ENABLE
2872 assert (cleanupmax >= cleanupcnt);
2873 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2877 assert (asyncmax >= asynccnt);
2878 array_verify (EV_A_ (W *)asyncs, asynccnt);
2881 #if EV_PREPARE_ENABLE
2882 assert (preparemax >= preparecnt);
2883 array_verify (EV_A_ (W *)prepares, preparecnt);
2887 assert (checkmax >= checkcnt);
2888 array_verify (EV_A_ (W *)checks, checkcnt);
2893 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2894 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2902 struct ev_loop * ecb_cold
2906 ev_default_loop (unsigned int flags) EV_THROW
2908 if (!ev_default_loop_ptr)
2911 EV_P = ev_default_loop_ptr = &default_loop_struct;
2913 ev_default_loop_ptr = 1;
2916 loop_init (EV_A_ flags);
2918 if (ev_backend (EV_A))
2921 ev_signal_init (&childev, childcb, SIGCHLD);
2922 ev_set_priority (&childev, EV_MAXPRI);
2923 ev_signal_start (EV_A_ &childev);
2924 ev_unref (EV_A); /* child watcher should not keep loop alive */
2928 ev_default_loop_ptr = 0;
2931 return ev_default_loop_ptr;
2935 ev_loop_fork (EV_P) EV_THROW
2940 /*****************************************************************************/
2943 ev_invoke (EV_P_ void *w, int revents)
2945 EV_CB_INVOKE ((W)w, revents);
2949 ev_pending_count (EV_P) EV_THROW
2952 unsigned int count = 0;
2954 for (pri = NUMPRI; pri--; )
2955 count += pendingcnt [pri];
2961 ev_invoke_pending (EV_P)
2963 pendingpri = NUMPRI;
2965 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
2969 while (pendingcnt [pendingpri])
2971 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2974 EV_CB_INVOKE (p->w, p->events);
2981 /* make idle watchers pending. this handles the "call-idle */
2982 /* only when higher priorities are idle" logic */
2986 if (expect_false (idleall))
2990 for (pri = NUMPRI; pri--; )
2992 if (pendingcnt [pri])
2997 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
3005 /* make timers pending */
3011 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
3015 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
3017 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
3019 /* first reschedule or stop timer */
3022 ev_at (w) += w->repeat;
3023 if (ev_at (w) < mn_now)
3026 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
3028 ANHE_at_cache (timers [HEAP0]);
3029 downheap (timers, timercnt, HEAP0);
3032 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
3035 feed_reverse (EV_A_ (W)w);
3037 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
3039 feed_reverse_done (EV_A_ EV_TIMER);
3043 #if EV_PERIODIC_ENABLE
3045 static void noinline
3046 periodic_recalc (EV_P_ ev_periodic *w)
3048 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3049 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3051 /* the above almost always errs on the low side */
3052 while (at <= ev_rt_now)
3054 ev_tstamp nat = at + w->interval;
3056 /* when resolution fails us, we use ev_rt_now */
3057 if (expect_false (nat == at))
3069 /* make periodics pending */
3071 periodics_reify (EV_P)
3075 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
3079 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
3081 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
3083 /* first reschedule or stop timer */
3084 if (w->reschedule_cb)
3086 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3088 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
3090 ANHE_at_cache (periodics [HEAP0]);
3091 downheap (periodics, periodiccnt, HEAP0);
3093 else if (w->interval)
3095 periodic_recalc (EV_A_ w);
3096 ANHE_at_cache (periodics [HEAP0]);
3097 downheap (periodics, periodiccnt, HEAP0);
3100 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
3103 feed_reverse (EV_A_ (W)w);
3105 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
3107 feed_reverse_done (EV_A_ EV_PERIODIC);
3111 /* simply recalculate all periodics */
3112 /* TODO: maybe ensure that at least one event happens when jumping forward? */
3113 static void noinline ecb_cold
3114 periodics_reschedule (EV_P)
3118 /* adjust periodics after time jump */
3119 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
3121 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
3123 if (w->reschedule_cb)
3124 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3125 else if (w->interval)
3126 periodic_recalc (EV_A_ w);
3128 ANHE_at_cache (periodics [i]);
3131 reheap (periodics, periodiccnt);
3135 /* adjust all timers by a given offset */
3136 static void noinline ecb_cold
3137 timers_reschedule (EV_P_ ev_tstamp adjust)
3141 for (i = 0; i < timercnt; ++i)
3143 ANHE *he = timers + i + HEAP0;
3144 ANHE_w (*he)->at += adjust;
3145 ANHE_at_cache (*he);
3149 /* fetch new monotonic and realtime times from the kernel */
3150 /* also detect if there was a timejump, and act accordingly */
3152 time_update (EV_P_ ev_tstamp max_block)
3154 #if EV_USE_MONOTONIC
3155 if (expect_true (have_monotonic))
3158 ev_tstamp odiff = rtmn_diff;
3160 mn_now = get_clock ();
3162 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
3163 /* interpolate in the meantime */
3164 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
3166 ev_rt_now = rtmn_diff + mn_now;
3171 ev_rt_now = ev_time ();
3173 /* loop a few times, before making important decisions.
3174 * on the choice of "4": one iteration isn't enough,
3175 * in case we get preempted during the calls to
3176 * ev_time and get_clock. a second call is almost guaranteed
3177 * to succeed in that case, though. and looping a few more times
3178 * doesn't hurt either as we only do this on time-jumps or
3179 * in the unlikely event of having been preempted here.
3184 rtmn_diff = ev_rt_now - mn_now;
3186 diff = odiff - rtmn_diff;
3188 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
3189 return; /* all is well */
3191 ev_rt_now = ev_time ();
3192 mn_now = get_clock ();
3196 /* no timer adjustment, as the monotonic clock doesn't jump */
3197 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
3198 # if EV_PERIODIC_ENABLE
3199 periodics_reschedule (EV_A);
3205 ev_rt_now = ev_time ();
3207 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
3209 /* adjust timers. this is easy, as the offset is the same for all of them */
3210 timers_reschedule (EV_A_ ev_rt_now - mn_now);
3211 #if EV_PERIODIC_ENABLE
3212 periodics_reschedule (EV_A);
3221 ev_run (EV_P_ int flags)
3227 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3229 loop_done = EVBREAK_CANCEL;
3231 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
3240 if (expect_false (curpid)) /* penalise the forking check even more */
3241 if (expect_false (getpid () != curpid))
3249 /* we might have forked, so queue fork handlers */
3250 if (expect_false (postfork))
3253 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
3258 #if EV_PREPARE_ENABLE
3259 /* queue prepare watchers (and execute them) */
3260 if (expect_false (preparecnt))
3262 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
3267 if (expect_false (loop_done))
3270 /* we might have forked, so reify kernel state if necessary */
3271 if (expect_false (postfork))
3274 /* update fd-related kernel structures */
3277 /* calculate blocking time */
3279 ev_tstamp waittime = 0.;
3280 ev_tstamp sleeptime = 0.;
3282 /* remember old timestamp for io_blocktime calculation */
3283 ev_tstamp prev_mn_now = mn_now;
3285 /* update time to cancel out callback processing overhead */
3286 time_update (EV_A_ 1e100);
3288 /* from now on, we want a pipe-wake-up */
3289 pipe_write_wanted = 1;
3291 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3293 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
3295 waittime = MAX_BLOCKTIME;
3299 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
3300 if (waittime > to) waittime = to;
3303 #if EV_PERIODIC_ENABLE
3306 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
3307 if (waittime > to) waittime = to;
3311 /* don't let timeouts decrease the waittime below timeout_blocktime */
3312 if (expect_false (waittime < timeout_blocktime))
3313 waittime = timeout_blocktime;
3315 /* at this point, we NEED to wait, so we have to ensure */
3316 /* to pass a minimum nonzero value to the backend */
3317 if (expect_false (waittime < backend_mintime))
3318 waittime = backend_mintime;
3320 /* extra check because io_blocktime is commonly 0 */
3321 if (expect_false (io_blocktime))
3323 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3325 if (sleeptime > waittime - backend_mintime)
3326 sleeptime = waittime - backend_mintime;
3328 if (expect_true (sleeptime > 0.))
3330 ev_sleep (sleeptime);
3331 waittime -= sleeptime;
3339 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
3340 backend_poll (EV_A_ waittime);
3341 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3343 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3345 ECB_MEMORY_FENCE_ACQUIRE;
3346 if (pipe_write_skipped)
3348 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3349 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3353 /* update ev_rt_now, do magic */
3354 time_update (EV_A_ waittime + sleeptime);
3357 /* queue pending timers and reschedule them */
3358 timers_reify (EV_A); /* relative timers called last */
3359 #if EV_PERIODIC_ENABLE
3360 periodics_reify (EV_A); /* absolute timers called first */
3364 /* queue idle watchers unless other events are pending */
3369 /* queue check watchers, to be executed first */
3370 if (expect_false (checkcnt))
3371 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3376 while (expect_true (
3379 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3382 if (loop_done == EVBREAK_ONE)
3383 loop_done = EVBREAK_CANCEL;
3393 ev_break (EV_P_ int how) EV_THROW
3399 ev_ref (EV_P) EV_THROW
3405 ev_unref (EV_P) EV_THROW
3411 ev_now_update (EV_P) EV_THROW
3413 time_update (EV_A_ 1e100);
3417 ev_suspend (EV_P) EV_THROW
3419 ev_now_update (EV_A);
3423 ev_resume (EV_P) EV_THROW
3425 ev_tstamp mn_prev = mn_now;
3427 ev_now_update (EV_A);
3428 timers_reschedule (EV_A_ mn_now - mn_prev);
3429 #if EV_PERIODIC_ENABLE
3430 /* TODO: really do this? */
3431 periodics_reschedule (EV_A);
3435 /*****************************************************************************/
3436 /* singly-linked list management, used when the expected list length is short */
3439 wlist_add (WL *head, WL elem)
3446 wlist_del (WL *head, WL elem)
3450 if (expect_true (*head == elem))
3456 head = &(*head)->next;
3460 /* internal, faster, version of ev_clear_pending */
3462 clear_pending (EV_P_ W w)
3466 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
3472 ev_clear_pending (EV_P_ void *w) EV_THROW
3475 int pending = w_->pending;
3477 if (expect_true (pending))
3479 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3480 p->w = (W)&pending_w;
3489 pri_adjust (EV_P_ W w)
3491 int pri = ev_priority (w);
3492 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3493 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3494 ev_set_priority (w, pri);
3498 ev_start (EV_P_ W w, int active)
3500 pri_adjust (EV_A_ w);
3512 /*****************************************************************************/
3515 ev_io_start (EV_P_ ev_io *w) EV_THROW
3519 if (expect_false (ev_is_active (w)))
3522 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3523 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3527 ev_start (EV_A_ (W)w, 1);
3528 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
3529 wlist_add (&anfds[fd].head, (WL)w);
3531 /* common bug, apparently */
3532 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3534 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3535 w->events &= ~EV__IOFDSET;
3541 ev_io_stop (EV_P_ ev_io *w) EV_THROW
3543 clear_pending (EV_A_ (W)w);
3544 if (expect_false (!ev_is_active (w)))
3547 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3551 wlist_del (&anfds[w->fd].head, (WL)w);
3552 ev_stop (EV_A_ (W)w);
3554 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3560 ev_timer_start (EV_P_ ev_timer *w) EV_THROW
3562 if (expect_false (ev_is_active (w)))
3565 ev_at (w) += mn_now;
3567 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
3572 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
3573 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
3574 ANHE_w (timers [ev_active (w)]) = (WT)w;
3575 ANHE_at_cache (timers [ev_active (w)]);
3576 upheap (timers, ev_active (w));
3580 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
3584 ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
3586 clear_pending (EV_A_ (W)w);
3587 if (expect_false (!ev_is_active (w)))
3593 int active = ev_active (w);
3595 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3599 if (expect_true (active < timercnt + HEAP0))
3601 timers [active] = timers [timercnt + HEAP0];
3602 adjustheap (timers, timercnt, active);
3606 ev_at (w) -= mn_now;
3608 ev_stop (EV_A_ (W)w);
3614 ev_timer_again (EV_P_ ev_timer *w) EV_THROW
3618 clear_pending (EV_A_ (W)w);
3620 if (ev_is_active (w))
3624 ev_at (w) = mn_now + w->repeat;
3625 ANHE_at_cache (timers [ev_active (w)]);
3626 adjustheap (timers, timercnt, ev_active (w));
3629 ev_timer_stop (EV_A_ w);
3633 ev_at (w) = w->repeat;
3634 ev_timer_start (EV_A_ w);
3641 ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3643 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3646 #if EV_PERIODIC_ENABLE
3648 ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
3650 if (expect_false (ev_is_active (w)))
3653 if (w->reschedule_cb)
3654 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3655 else if (w->interval)
3657 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
3658 periodic_recalc (EV_A_ w);
3661 ev_at (w) = w->offset;
3666 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
3667 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
3668 ANHE_w (periodics [ev_active (w)]) = (WT)w;
3669 ANHE_at_cache (periodics [ev_active (w)]);
3670 upheap (periodics, ev_active (w));
3674 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
3678 ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
3680 clear_pending (EV_A_ (W)w);
3681 if (expect_false (!ev_is_active (w)))
3687 int active = ev_active (w);
3689 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3693 if (expect_true (active < periodiccnt + HEAP0))
3695 periodics [active] = periodics [periodiccnt + HEAP0];
3696 adjustheap (periodics, periodiccnt, active);
3700 ev_stop (EV_A_ (W)w);
3706 ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
3708 /* TODO: use adjustheap and recalculation */
3709 ev_periodic_stop (EV_A_ w);
3710 ev_periodic_start (EV_A_ w);
3715 # define SA_RESTART 0
3718 #if EV_SIGNAL_ENABLE
3721 ev_signal_start (EV_P_ ev_signal *w) EV_THROW
3723 if (expect_false (ev_is_active (w)))
3726 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3729 assert (("libev: a signal must not be attached to two different loops",
3730 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3732 signals [w->signum - 1].loop = EV_A;
3733 ECB_MEMORY_FENCE_RELEASE;
3741 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3742 if (sigfd < 0 && errno == EINVAL)
3743 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3747 fd_intern (sigfd); /* doing it twice will not hurt */
3749 sigemptyset (&sigfd_set);
3751 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3752 ev_set_priority (&sigfd_w, EV_MAXPRI);
3753 ev_io_start (EV_A_ &sigfd_w);
3754 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3760 /* TODO: check .head */
3761 sigaddset (&sigfd_set, w->signum);
3762 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3764 signalfd (sigfd, &sigfd_set, 0);
3768 ev_start (EV_A_ (W)w, 1);
3769 wlist_add (&signals [w->signum - 1].head, (WL)w);
3772 # if EV_USE_SIGNALFD
3773 if (sigfd < 0) /*TODO*/
3779 signal (w->signum, ev_sighandler);
3781 struct sigaction sa;
3785 sa.sa_handler = ev_sighandler;
3786 sigfillset (&sa.sa_mask);
3787 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3788 sigaction (w->signum, &sa, 0);
3790 if (origflags & EVFLAG_NOSIGMASK)
3792 sigemptyset (&sa.sa_mask);
3793 sigaddset (&sa.sa_mask, w->signum);
3794 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3803 ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
3805 clear_pending (EV_A_ (W)w);
3806 if (expect_false (!ev_is_active (w)))
3811 wlist_del (&signals [w->signum - 1].head, (WL)w);
3812 ev_stop (EV_A_ (W)w);
3814 if (!signals [w->signum - 1].head)
3817 signals [w->signum - 1].loop = 0; /* unattach from signal */
3825 sigaddset (&ss, w->signum);
3826 sigdelset (&sigfd_set, w->signum);
3828 signalfd (sigfd, &sigfd_set, 0);
3829 sigprocmask (SIG_UNBLOCK, &ss, 0);
3833 signal (w->signum, SIG_DFL);
3844 ev_child_start (EV_P_ ev_child *w) EV_THROW
3847 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3849 if (expect_false (ev_is_active (w)))
3854 ev_start (EV_A_ (W)w, 1);
3855 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3861 ev_child_stop (EV_P_ ev_child *w) EV_THROW
3863 clear_pending (EV_A_ (W)w);
3864 if (expect_false (!ev_is_active (w)))
3869 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3870 ev_stop (EV_A_ (W)w);
3881 # define lstat(a,b) _stati64 (a,b)
3884 #define DEF_STAT_INTERVAL 5.0074891
3885 #define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3886 #define MIN_STAT_INTERVAL 0.1074891
3888 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3892 /* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3893 # define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3895 static void noinline
3896 infy_add (EV_P_ ev_stat *w)
3898 w->wd = inotify_add_watch (fs_fd, w->path,
3899 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
3900 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
3901 | IN_DONT_FOLLOW | IN_MASK_ADD);
3907 /* now local changes will be tracked by inotify, but remote changes won't */
3908 /* unless the filesystem is known to be local, we therefore still poll */
3909 /* also do poll on <2.6.25, but with normal frequency */
3912 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3913 else if (!statfs (w->path, &sfs)
3914 && (sfs.f_type == 0x1373 /* devfs */
3915 || sfs.f_type == 0x4006 /* fat */
3916 || sfs.f_type == 0x4d44 /* msdos */
3917 || sfs.f_type == 0xEF53 /* ext2/3 */
3918 || sfs.f_type == 0x72b6 /* jffs2 */
3919 || sfs.f_type == 0x858458f6 /* ramfs */
3920 || sfs.f_type == 0x5346544e /* ntfs */
3921 || sfs.f_type == 0x3153464a /* jfs */
3922 || sfs.f_type == 0x9123683e /* btrfs */
3923 || sfs.f_type == 0x52654973 /* reiser3 */
3924 || sfs.f_type == 0x01021994 /* tmpfs */
3925 || sfs.f_type == 0x58465342 /* xfs */))
3926 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3928 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3932 /* can't use inotify, continue to stat */
3933 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3935 /* if path is not there, monitor some parent directory for speedup hints */
3936 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3937 /* but an efficiency issue only */
3938 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
3941 strcpy (path, w->path);
3945 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
3946 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
3948 char *pend = strrchr (path, '/');
3950 if (!pend || pend == path)
3954 w->wd = inotify_add_watch (fs_fd, path, mask);
3956 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3961 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3963 /* now re-arm timer, if required */
3964 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3965 ev_timer_again (EV_A_ &w->timer);
3966 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3969 static void noinline
3970 infy_del (EV_P_ ev_stat *w)
3979 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3980 wlist_del (&fs_hash [slot].head, (WL)w);
3982 /* remove this watcher, if others are watching it, they will rearm */
3983 inotify_rm_watch (fs_fd, wd);
3986 static void noinline
3987 infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3990 /* overflow, need to check for all hash slots */
3991 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3992 infy_wd (EV_A_ slot, wd, ev);
3997 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3999 ev_stat *w = (ev_stat *)w_;
4000 w_ = w_->next; /* lets us remove this watcher and all before it */
4002 if (w->wd == wd || wd == -1)
4004 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
4006 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4008 infy_add (EV_A_ w); /* re-add, no matter what */
4011 stat_timer_cb (EV_A_ &w->timer, 0);
4018 infy_cb (EV_P_ ev_io *w, int revents)
4020 char buf [EV_INOTIFY_BUFSIZE];
4022 int len = read (fs_fd, buf, sizeof (buf));
4024 for (ofs = 0; ofs < len; )
4026 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
4027 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4028 ofs += sizeof (struct inotify_event) + ev->len;
4032 inline_size void ecb_cold
4033 ev_check_2625 (EV_P)
4035 /* kernels < 2.6.25 are borked
4036 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4038 if (ev_linux_version () < 0x020619)
4047 #if defined IN_CLOEXEC && defined IN_NONBLOCK
4048 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4052 return inotify_init ();
4063 ev_check_2625 (EV_A);
4065 fs_fd = infy_newfd ();
4070 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
4071 ev_set_priority (&fs_w, EV_MAXPRI);
4072 ev_io_start (EV_A_ &fs_w);
4086 ev_io_stop (EV_A_ &fs_w);
4088 fs_fd = infy_newfd ();
4093 ev_io_set (&fs_w, fs_fd, EV_READ);
4094 ev_io_start (EV_A_ &fs_w);
4098 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
4100 WL w_ = fs_hash [slot].head;
4101 fs_hash [slot].head = 0;
4105 ev_stat *w = (ev_stat *)w_;
4106 w_ = w_->next; /* lets us add this watcher */
4111 infy_add (EV_A_ w); /* re-add, no matter what */
4114 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4115 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4116 ev_timer_again (EV_A_ &w->timer);
4117 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4126 # define EV_LSTAT(p,b) _stati64 (p, b)
4128 # define EV_LSTAT(p,b) lstat (p, b)
4132 ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
4134 if (lstat (w->path, &w->attr) < 0)
4135 w->attr.st_nlink = 0;
4136 else if (!w->attr.st_nlink)
4137 w->attr.st_nlink = 1;
4140 static void noinline
4141 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
4143 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
4145 ev_statdata prev = w->attr;
4146 ev_stat_stat (EV_A_ w);
4148 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
4150 prev.st_dev != w->attr.st_dev
4151 || prev.st_ino != w->attr.st_ino
4152 || prev.st_mode != w->attr.st_mode
4153 || prev.st_nlink != w->attr.st_nlink
4154 || prev.st_uid != w->attr.st_uid
4155 || prev.st_gid != w->attr.st_gid
4156 || prev.st_rdev != w->attr.st_rdev
4157 || prev.st_size != w->attr.st_size
4158 || prev.st_atime != w->attr.st_atime
4159 || prev.st_mtime != w->attr.st_mtime
4160 || prev.st_ctime != w->attr.st_ctime
4162 /* we only update w->prev on actual differences */
4163 /* in case we test more often than invoke the callback, */
4164 /* to ensure that prev is always different to attr */
4172 ev_stat_stat (EV_A_ w); /* avoid race... */
4176 ev_feed_event (EV_A_ w, EV_STAT);
4181 ev_stat_start (EV_P_ ev_stat *w) EV_THROW
4183 if (expect_false (ev_is_active (w)))
4186 ev_stat_stat (EV_A_ w);
4188 if (w->interval < MIN_STAT_INTERVAL && w->interval)
4189 w->interval = MIN_STAT_INTERVAL;
4191 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
4192 ev_set_priority (&w->timer, ev_priority (w));
4202 ev_timer_again (EV_A_ &w->timer);
4206 ev_start (EV_A_ (W)w, 1);
4212 ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
4214 clear_pending (EV_A_ (W)w);
4215 if (expect_false (!ev_is_active (w)))
4224 if (ev_is_active (&w->timer))
4227 ev_timer_stop (EV_A_ &w->timer);
4230 ev_stop (EV_A_ (W)w);
4238 ev_idle_start (EV_P_ ev_idle *w) EV_THROW
4240 if (expect_false (ev_is_active (w)))
4243 pri_adjust (EV_A_ (W)w);
4248 int active = ++idlecnt [ABSPRI (w)];
4251 ev_start (EV_A_ (W)w, active);
4253 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
4254 idles [ABSPRI (w)][active - 1] = w;
4261 ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
4263 clear_pending (EV_A_ (W)w);
4264 if (expect_false (!ev_is_active (w)))
4270 int active = ev_active (w);
4272 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
4273 ev_active (idles [ABSPRI (w)][active - 1]) = active;
4275 ev_stop (EV_A_ (W)w);
4283 #if EV_PREPARE_ENABLE
4285 ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
4287 if (expect_false (ev_is_active (w)))
4292 ev_start (EV_A_ (W)w, ++preparecnt);
4293 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
4294 prepares [preparecnt - 1] = w;
4300 ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
4302 clear_pending (EV_A_ (W)w);
4303 if (expect_false (!ev_is_active (w)))
4309 int active = ev_active (w);
4311 prepares [active - 1] = prepares [--preparecnt];
4312 ev_active (prepares [active - 1]) = active;
4315 ev_stop (EV_A_ (W)w);
4323 ev_check_start (EV_P_ ev_check *w) EV_THROW
4325 if (expect_false (ev_is_active (w)))
4330 ev_start (EV_A_ (W)w, ++checkcnt);
4331 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
4332 checks [checkcnt - 1] = w;
4338 ev_check_stop (EV_P_ ev_check *w) EV_THROW
4340 clear_pending (EV_A_ (W)w);
4341 if (expect_false (!ev_is_active (w)))
4347 int active = ev_active (w);
4349 checks [active - 1] = checks [--checkcnt];
4350 ev_active (checks [active - 1]) = active;
4353 ev_stop (EV_A_ (W)w);
4361 ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
4363 ev_run (w->other, EVRUN_NOWAIT);
4367 embed_io_cb (EV_P_ ev_io *io, int revents)
4369 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
4372 ev_feed_event (EV_A_ (W)w, EV_EMBED);
4374 ev_run (w->other, EVRUN_NOWAIT);
4378 embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4380 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4388 ev_run (EV_A_ EVRUN_NOWAIT);
4394 embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4396 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4398 ev_embed_stop (EV_A_ w);
4403 ev_loop_fork (EV_A);
4404 ev_run (EV_A_ EVRUN_NOWAIT);
4407 ev_embed_start (EV_A_ w);
4412 embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4414 ev_idle_stop (EV_A_ idle);
4419 ev_embed_start (EV_P_ ev_embed *w) EV_THROW
4421 if (expect_false (ev_is_active (w)))
4426 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4427 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4432 ev_set_priority (&w->io, ev_priority (w));
4433 ev_io_start (EV_A_ &w->io);
4435 ev_prepare_init (&w->prepare, embed_prepare_cb);
4436 ev_set_priority (&w->prepare, EV_MINPRI);
4437 ev_prepare_start (EV_A_ &w->prepare);
4439 ev_fork_init (&w->fork, embed_fork_cb);
4440 ev_fork_start (EV_A_ &w->fork);
4442 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4444 ev_start (EV_A_ (W)w, 1);
4450 ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
4452 clear_pending (EV_A_ (W)w);
4453 if (expect_false (!ev_is_active (w)))
4458 ev_io_stop (EV_A_ &w->io);
4459 ev_prepare_stop (EV_A_ &w->prepare);
4460 ev_fork_stop (EV_A_ &w->fork);
4462 ev_stop (EV_A_ (W)w);
4470 ev_fork_start (EV_P_ ev_fork *w) EV_THROW
4472 if (expect_false (ev_is_active (w)))
4477 ev_start (EV_A_ (W)w, ++forkcnt);
4478 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4479 forks [forkcnt - 1] = w;
4485 ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
4487 clear_pending (EV_A_ (W)w);
4488 if (expect_false (!ev_is_active (w)))
4494 int active = ev_active (w);
4496 forks [active - 1] = forks [--forkcnt];
4497 ev_active (forks [active - 1]) = active;
4500 ev_stop (EV_A_ (W)w);
4506 #if EV_CLEANUP_ENABLE
4508 ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4510 if (expect_false (ev_is_active (w)))
4515 ev_start (EV_A_ (W)w, ++cleanupcnt);
4516 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4517 cleanups [cleanupcnt - 1] = w;
4519 /* cleanup watchers should never keep a refcount on the loop */
4525 ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4527 clear_pending (EV_A_ (W)w);
4528 if (expect_false (!ev_is_active (w)))
4535 int active = ev_active (w);
4537 cleanups [active - 1] = cleanups [--cleanupcnt];
4538 ev_active (cleanups [active - 1]) = active;
4541 ev_stop (EV_A_ (W)w);
4549 ev_async_start (EV_P_ ev_async *w) EV_THROW
4551 if (expect_false (ev_is_active (w)))
4560 ev_start (EV_A_ (W)w, ++asynccnt);
4561 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4562 asyncs [asynccnt - 1] = w;
4568 ev_async_stop (EV_P_ ev_async *w) EV_THROW
4570 clear_pending (EV_A_ (W)w);
4571 if (expect_false (!ev_is_active (w)))
4577 int active = ev_active (w);
4579 asyncs [active - 1] = asyncs [--asynccnt];
4580 ev_active (asyncs [active - 1]) = active;
4583 ev_stop (EV_A_ (W)w);
4589 ev_async_send (EV_P_ ev_async *w) EV_THROW
4592 evpipe_write (EV_A_ &async_pending);
4596 /*****************************************************************************/
4602 void (*cb)(int revents, void *arg);
4607 once_cb (EV_P_ struct ev_once *once, int revents)
4609 void (*cb)(int revents, void *arg) = once->cb;
4610 void *arg = once->arg;
4612 ev_io_stop (EV_A_ &once->io);
4613 ev_timer_stop (EV_A_ &once->to);
4620 once_cb_io (EV_P_ ev_io *w, int revents)
4622 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4624 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
4628 once_cb_to (EV_P_ ev_timer *w, int revents)
4630 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4632 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
4636 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
4638 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
4640 if (expect_false (!once))
4642 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
4649 ev_init (&once->io, once_cb_io);
4652 ev_io_set (&once->io, fd, events);
4653 ev_io_start (EV_A_ &once->io);
4656 ev_init (&once->to, once_cb_to);
4659 ev_timer_set (&once->to, timeout, 0.);
4660 ev_timer_start (EV_A_ &once->to);
4664 /*****************************************************************************/
4668 ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4671 ev_watcher_list *wl, *wn;
4673 if (types & (EV_IO | EV_EMBED))
4674 for (i = 0; i < anfdmax; ++i)
4675 for (wl = anfds [i].head; wl; )
4680 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4682 if (types & EV_EMBED)
4683 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4688 if (ev_cb ((ev_io *)wl) == infy_cb)
4692 if ((ev_io *)wl != &pipe_w)
4694 cb (EV_A_ EV_IO, wl);
4699 if (types & (EV_TIMER | EV_STAT))
4700 for (i = timercnt + HEAP0; i-- > HEAP0; )
4702 /*TODO: timer is not always active*/
4703 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4705 if (types & EV_STAT)
4706 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4710 if (types & EV_TIMER)
4711 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4713 #if EV_PERIODIC_ENABLE
4714 if (types & EV_PERIODIC)
4715 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4716 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4720 if (types & EV_IDLE)
4721 for (j = NUMPRI; j--; )
4722 for (i = idlecnt [j]; i--; )
4723 cb (EV_A_ EV_IDLE, idles [j][i]);
4727 if (types & EV_FORK)
4728 for (i = forkcnt; i--; )
4729 if (ev_cb (forks [i]) != embed_fork_cb)
4730 cb (EV_A_ EV_FORK, forks [i]);
4734 if (types & EV_ASYNC)
4735 for (i = asynccnt; i--; )
4736 cb (EV_A_ EV_ASYNC, asyncs [i]);
4739 #if EV_PREPARE_ENABLE
4740 if (types & EV_PREPARE)
4741 for (i = preparecnt; i--; )
4742 # if EV_EMBED_ENABLE
4743 if (ev_cb (prepares [i]) != embed_prepare_cb)
4745 cb (EV_A_ EV_PREPARE, prepares [i]);
4749 if (types & EV_CHECK)
4750 for (i = checkcnt; i--; )
4751 cb (EV_A_ EV_CHECK, checks [i]);
4754 #if EV_SIGNAL_ENABLE
4755 if (types & EV_SIGNAL)
4756 for (i = 0; i < EV_NSIG - 1; ++i)
4757 for (wl = signals [i].head; wl; )
4760 cb (EV_A_ EV_SIGNAL, wl);
4766 if (types & EV_CHILD)
4767 for (i = (EV_PID_HASHSIZE); i--; )
4768 for (wl = childs [i]; wl; )
4771 cb (EV_A_ EV_CHILD, wl);
4775 /* EV_STAT 0x00001000 /* stat data changed */
4776 /* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4781 #include "ev_wrap.h"