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.
510 typedef signed char int8_t;
511 typedef unsigned char uint8_t;
512 typedef signed short int16_t;
513 typedef unsigned short uint16_t;
514 typedef signed int int32_t;
515 typedef unsigned int uint32_t;
517 typedef signed long long int64_t;
518 typedef unsigned long long uint64_t;
519 #else /* _MSC_VER || __BORLANDC__ */
520 typedef signed __int64 int64_t;
521 typedef unsigned __int64 uint64_t;
524 #include <inttypes.h>
527 /* many compilers define _GNUC_ to some versions but then only implement
528 * what their idiot authors think are the "more important" extensions,
529 * causing enormous grief in return for some better fake benchmark numbers.
531 * we try to detect these and simply assume they are not gcc - if they have
532 * an issue with that they should have done it right in the first place.
534 #ifndef ECB_GCC_VERSION
535 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
536 #define ECB_GCC_VERSION(major,minor) 0
538 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
542 /*****************************************************************************/
544 /* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
545 /* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
548 # define ECB_NO_SMP 1
551 #if ECB_NO_THREADS || ECB_NO_SMP
552 #define ECB_MEMORY_FENCE do { } while (0)
555 #ifndef ECB_MEMORY_FENCE
556 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
557 #if __i386 || __i386__
558 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
559 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
560 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
561 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
562 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
563 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
564 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
565 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
566 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
567 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
568 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
569 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
570 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
571 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
572 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
573 #elif __sparc || __sparc__
574 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")
575 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
576 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
577 #elif defined __s390__ || defined __s390x__
578 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
579 #elif defined __mips__
580 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
581 #elif defined __alpha__
582 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
587 #ifndef ECB_MEMORY_FENCE
588 #if ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
589 #define ECB_MEMORY_FENCE __sync_synchronize ()
590 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
591 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
592 #elif _MSC_VER >= 1400 /* VC++ 2005 */
593 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
594 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
595 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
596 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
599 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
600 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
601 #include <mbarrier.h>
602 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
603 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
604 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
606 #define ECB_MEMORY_FENCE __sync ()
610 #ifndef ECB_MEMORY_FENCE
611 #if !ECB_AVOID_PTHREADS
613 * if you get undefined symbol references to pthread_mutex_lock,
614 * or failure to find pthread.h, then you should implement
615 * the ECB_MEMORY_FENCE operations for your cpu/compiler
616 * OR provide pthread.h and link against the posix thread library
620 #define ECB_NEEDS_PTHREADS 1
621 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
623 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
624 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
628 #if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
629 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
632 #if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
633 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
636 /*****************************************************************************/
638 #define ECB_C99 (__STDC_VERSION__ >= 199901L)
641 #define ecb_inline static inline
642 #elif ECB_GCC_VERSION(2,5)
643 #define ecb_inline static __inline__
645 #define ecb_inline static inline
647 #define ecb_inline static
650 #if ECB_GCC_VERSION(3,3)
651 #define ecb_restrict __restrict__
653 #define ecb_restrict restrict
658 typedef int ecb_bool;
660 #define ECB_CONCAT_(a, b) a ## b
661 #define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
662 #define ECB_STRINGIFY_(a) # a
663 #define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
665 #define ecb_function_ ecb_inline
667 #if ECB_GCC_VERSION(3,1)
668 #define ecb_attribute(attrlist) __attribute__(attrlist)
669 #define ecb_is_constant(expr) __builtin_constant_p (expr)
670 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
671 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
673 #define ecb_attribute(attrlist)
674 #define ecb_is_constant(expr) 0
675 #define ecb_expect(expr,value) (expr)
676 #define ecb_prefetch(addr,rw,locality)
679 /* no emulation for ecb_decltype */
680 #if ECB_GCC_VERSION(4,5)
681 #define ecb_decltype(x) __decltype(x)
682 #elif ECB_GCC_VERSION(3,0)
683 #define ecb_decltype(x) __typeof(x)
686 #define ecb_noinline ecb_attribute ((__noinline__))
687 #define ecb_noreturn ecb_attribute ((__noreturn__))
688 #define ecb_unused ecb_attribute ((__unused__))
689 #define ecb_const ecb_attribute ((__const__))
690 #define ecb_pure ecb_attribute ((__pure__))
692 #if ECB_GCC_VERSION(4,3)
693 #define ecb_artificial ecb_attribute ((__artificial__))
694 #define ecb_hot ecb_attribute ((__hot__))
695 #define ecb_cold ecb_attribute ((__cold__))
697 #define ecb_artificial
702 /* put around conditional expressions if you are very sure that the */
703 /* expression is mostly true or mostly false. note that these return */
704 /* booleans, not the expression. */
705 #define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
706 #define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
707 /* for compatibility to the rest of the world */
708 #define ecb_likely(expr) ecb_expect_true (expr)
709 #define ecb_unlikely(expr) ecb_expect_false (expr)
711 /* count trailing zero bits and count # of one bits */
712 #if ECB_GCC_VERSION(3,4)
713 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
714 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
715 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
716 #define ecb_ctz32(x) __builtin_ctz (x)
717 #define ecb_ctz64(x) __builtin_ctzll (x)
718 #define ecb_popcount32(x) __builtin_popcount (x)
721 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
723 ecb_ctz32 (uint32_t x)
727 x &= ~x + 1; /* this isolates the lowest bit */
729 #if ECB_branchless_on_i386
730 r += !!(x & 0xaaaaaaaa) << 0;
731 r += !!(x & 0xcccccccc) << 1;
732 r += !!(x & 0xf0f0f0f0) << 2;
733 r += !!(x & 0xff00ff00) << 3;
734 r += !!(x & 0xffff0000) << 4;
736 if (x & 0xaaaaaaaa) r += 1;
737 if (x & 0xcccccccc) r += 2;
738 if (x & 0xf0f0f0f0) r += 4;
739 if (x & 0xff00ff00) r += 8;
740 if (x & 0xffff0000) r += 16;
746 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
748 ecb_ctz64 (uint64_t x)
750 int shift = x & 0xffffffffU ? 0 : 32;
751 return ecb_ctz32 (x >> shift) + shift;
754 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
756 ecb_popcount32 (uint32_t x)
758 x -= (x >> 1) & 0x55555555;
759 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
760 x = ((x >> 4) + x) & 0x0f0f0f0f;
766 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
767 ecb_function_ int ecb_ld32 (uint32_t x)
771 if (x >> 16) { x >>= 16; r += 16; }
772 if (x >> 8) { x >>= 8; r += 8; }
773 if (x >> 4) { x >>= 4; r += 4; }
774 if (x >> 2) { x >>= 2; r += 2; }
775 if (x >> 1) { r += 1; }
780 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
781 ecb_function_ int ecb_ld64 (uint64_t x)
785 if (x >> 32) { x >>= 32; r += 32; }
787 return r + ecb_ld32 (x);
791 ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
792 ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
794 return ( (x * 0x0802U & 0x22110U)
795 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
798 ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
799 ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
801 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
802 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
803 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
804 x = ( x >> 8 ) | ( x << 8);
809 ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
810 ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
812 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
813 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
814 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
815 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
816 x = ( x >> 16 ) | ( x << 16);
821 /* popcount64 is only available on 64 bit cpus as gcc builtin */
822 /* so for this version we are lazy */
823 ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
825 ecb_popcount64 (uint64_t x)
827 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
830 ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
831 ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
832 ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
833 ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
834 ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
835 ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
836 ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
837 ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
839 ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
840 ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
841 ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
842 ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
843 ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
844 ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
845 ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
846 ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
848 #if ECB_GCC_VERSION(4,3)
849 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
850 #define ecb_bswap32(x) __builtin_bswap32 (x)
851 #define ecb_bswap64(x) __builtin_bswap64 (x)
853 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
854 ecb_function_ uint16_t
855 ecb_bswap16 (uint16_t x)
857 return ecb_rotl16 (x, 8);
860 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
861 ecb_function_ uint32_t
862 ecb_bswap32 (uint32_t x)
864 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
867 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
868 ecb_function_ uint64_t
869 ecb_bswap64 (uint64_t x)
871 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
875 #if ECB_GCC_VERSION(4,5)
876 #define ecb_unreachable() __builtin_unreachable ()
878 /* this seems to work fine, but gcc always emits a warning for it :/ */
879 ecb_inline void ecb_unreachable (void) ecb_noreturn;
880 ecb_inline void ecb_unreachable (void) { }
883 /* try to tell the compiler that some condition is definitely true */
884 #define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
886 ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
887 ecb_inline unsigned char
888 ecb_byteorder_helper (void)
890 const uint32_t u = 0x11223344;
891 return *(unsigned char *)&u;
894 ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
895 ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
896 ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
897 ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
899 #if ECB_GCC_VERSION(3,0) || ECB_C99
900 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
902 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
907 static inline T ecb_div_rd (T val, T div)
909 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
912 static inline T ecb_div_ru (T val, T div)
914 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
917 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
918 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
921 #if ecb_cplusplus_does_not_suck
922 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
923 template<typename T, int N>
924 static inline int ecb_array_length (const T (&arr)[N])
929 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
936 #if ECB_MEMORY_FENCE_NEEDS_PTHREADS
937 /* if your architecture doesn't need memory fences, e.g. because it is
938 * single-cpu/core, or if you use libev in a project that doesn't use libev
939 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
940 * libev, in which cases the memory fences become nops.
941 * alternatively, you can remove this #error and link against libpthread,
942 * which will then provide the memory fences.
944 # error "memory fences not defined for your architecture, please report"
947 #ifndef ECB_MEMORY_FENCE
948 # define ECB_MEMORY_FENCE do { } while (0)
949 # define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
950 # define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
953 #define expect_false(cond) ecb_expect_false (cond)
954 #define expect_true(cond) ecb_expect_true (cond)
955 #define noinline ecb_noinline
957 #define inline_size ecb_inline
960 # define inline_speed ecb_inline
962 # define inline_speed static noinline
965 #define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
967 #if EV_MINPRI == EV_MAXPRI
968 # define ABSPRI(w) (((W)w), 0)
970 # define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
973 #define EMPTY /* required for microsofts broken pseudo-c compiler */
974 #define EMPTY2(a,b) /* used to suppress some warnings */
976 typedef ev_watcher *W;
977 typedef ev_watcher_list *WL;
978 typedef ev_watcher_time *WT;
980 #define ev_active(w) ((W)(w))->active
981 #define ev_at(w) ((WT)(w))->at
984 /* sig_atomic_t is used to avoid per-thread variables or locking but still */
985 /* giving it a reasonably high chance of working on typical architectures */
986 static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
990 static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
993 #ifndef EV_FD_TO_WIN32_HANDLE
994 # define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
996 #ifndef EV_WIN32_HANDLE_TO_FD
997 # define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
999 #ifndef EV_WIN32_CLOSE_FD
1000 # define EV_WIN32_CLOSE_FD(fd) close (fd)
1004 # include "ev_win32.c"
1007 /*****************************************************************************/
1009 /* define a suitable floor function (only used by periodics atm) */
1013 # define ev_floor(v) floor (v)
1018 /* a floor() replacement function, should be independent of ev_tstamp type */
1019 static ev_tstamp noinline
1020 ev_floor (ev_tstamp v)
1022 /* the choice of shift factor is not terribly important */
1023 #if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1024 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1026 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1029 /* argument too large for an unsigned long? */
1030 if (expect_false (v >= shift))
1035 return v; /* very large number */
1037 f = shift * ev_floor (v * (1. / shift));
1038 return f + ev_floor (v - f);
1041 /* special treatment for negative args? */
1042 if (expect_false (v < 0.))
1044 ev_tstamp f = -ev_floor (-v);
1046 return f - (f == v ? 0 : 1);
1049 /* fits into an unsigned long */
1050 return (unsigned long)v;
1055 /*****************************************************************************/
1058 # include <sys/utsname.h>
1061 static unsigned int noinline ecb_cold
1062 ev_linux_version (void)
1068 char *p = buf.release;
1073 for (i = 3+1; --i; )
1079 if (*p >= '0' && *p <= '9')
1080 c = c * 10 + *p++ - '0';
1097 /*****************************************************************************/
1100 static void noinline ecb_cold
1101 ev_printerr (const char *msg)
1103 write (STDERR_FILENO, msg, strlen (msg));
1107 static void (*syserr_cb)(const char *msg) EV_THROW;
1110 ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
1115 static void noinline ecb_cold
1116 ev_syserr (const char *msg)
1119 msg = "(libev) system error";
1128 ev_printerr (strerror (errno));
1138 ev_realloc_emul (void *ptr, long size) EV_THROW
1141 return realloc (ptr, size);
1143 /* some systems, notably openbsd and darwin, fail to properly
1144 * implement realloc (x, 0) (as required by both ansi c-89 and
1145 * the single unix specification, so work around them here.
1149 return realloc (ptr, size);
1156 static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
1159 ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
1165 ev_realloc (void *ptr, long size)
1167 ptr = alloc (ptr, size);
1172 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1174 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1182 #define ev_malloc(size) ev_realloc (0, (size))
1183 #define ev_free(ptr) ev_realloc ((ptr), 0)
1185 /*****************************************************************************/
1187 /* set in reify when reification needed */
1188 #define EV_ANFD_REIFY 1
1190 /* file descriptor info structure */
1194 unsigned char events; /* the events watched for */
1195 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1196 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
1197 unsigned char unused;
1199 unsigned int egen; /* generation counter to counter epoll bugs */
1201 #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1209 /* stores the pending event set for a given watcher */
1213 int events; /* the pending event set for the given watcher */
1217 /* hash table entry per inotify-id */
1225 #if EV_HEAP_CACHE_AT
1226 /* a heap element */
1232 #define ANHE_w(he) (he).w /* access watcher, read-write */
1233 #define ANHE_at(he) (he).at /* access cached at, read-only */
1234 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1236 /* a heap element */
1239 #define ANHE_w(he) (he)
1240 #define ANHE_at(he) (he)->at
1241 #define ANHE_at_cache(he)
1248 ev_tstamp ev_rt_now;
1249 #define ev_rt_now ((loop)->ev_rt_now)
1250 #define VAR(name,decl) decl;
1251 #include "ev_vars.h"
1254 #include "ev_wrap.h"
1256 static struct ev_loop default_loop_struct;
1257 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
1261 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
1262 #define VAR(name,decl) static decl;
1263 #include "ev_vars.h"
1266 static int ev_default_loop_ptr;
1271 # define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1272 # define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1273 # define EV_INVOKE_PENDING invoke_cb (EV_A)
1275 # define EV_RELEASE_CB (void)0
1276 # define EV_ACQUIRE_CB (void)0
1277 # define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1280 #define EVBREAK_RECURSE 0x80
1282 /*****************************************************************************/
1284 #ifndef EV_HAVE_EV_TIME
1286 ev_time (void) EV_THROW
1289 if (expect_true (have_realtime))
1292 clock_gettime (CLOCK_REALTIME, &ts);
1293 return ts.tv_sec + ts.tv_nsec * 1e-9;
1298 gettimeofday (&tv, 0);
1299 return tv.tv_sec + tv.tv_usec * 1e-6;
1303 inline_size ev_tstamp
1306 #if EV_USE_MONOTONIC
1307 if (expect_true (have_monotonic))
1310 clock_gettime (CLOCK_MONOTONIC, &ts);
1311 return ts.tv_sec + ts.tv_nsec * 1e-9;
1320 ev_now (EV_P) EV_THROW
1327 ev_sleep (ev_tstamp delay) EV_THROW
1331 #if EV_USE_NANOSLEEP
1334 EV_TS_SET (ts, delay);
1336 #elif defined _WIN32
1337 Sleep ((unsigned long)(delay * 1e3));
1341 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1342 /* something not guaranteed by newer posix versions, but guaranteed */
1344 EV_TV_SET (tv, delay);
1345 select (0, 0, 0, 0, &tv);
1350 /*****************************************************************************/
1352 #define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1354 /* find a suitable new size for the given array, */
1355 /* hopefully by rounding to a nice-to-malloc size */
1357 array_nextsize (int elem, int cur, int cnt)
1365 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
1366 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
1369 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
1370 ncur = ncur - sizeof (void *) * 4;
1377 static void * noinline ecb_cold
1378 array_realloc (int elem, void *base, int *cur, int cnt)
1380 *cur = array_nextsize (elem, *cur, cnt);
1381 return ev_realloc (base, elem * *cur);
1384 #define array_init_zero(base,count) \
1385 memset ((void *)(base), 0, sizeof (*(base)) * (count))
1387 #define array_needsize(type,base,cur,cnt,init) \
1388 if (expect_false ((cnt) > (cur))) \
1390 int ecb_unused ocur_ = (cur); \
1391 (base) = (type *)array_realloc \
1392 (sizeof (type), (base), &(cur), (cnt)); \
1393 init ((base) + (ocur_), (cur) - ocur_); \
1397 #define array_slim(type,stem) \
1398 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
1400 stem ## max = array_roundsize (stem ## cnt >> 1); \
1401 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
1402 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
1406 #define array_free(stem, idx) \
1407 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
1409 /*****************************************************************************/
1411 /* dummy callback for pending events */
1412 static void noinline
1413 pendingcb (EV_P_ ev_prepare *w, int revents)
1418 ev_feed_event (EV_P_ void *w, int revents) EV_THROW
1421 int pri = ABSPRI (w_);
1423 if (expect_false (w_->pending))
1424 pendings [pri][w_->pending - 1].events |= revents;
1427 w_->pending = ++pendingcnt [pri];
1428 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1429 pendings [pri][w_->pending - 1].w = w_;
1430 pendings [pri][w_->pending - 1].events = revents;
1433 pendingpri = NUMPRI - 1;
1437 feed_reverse (EV_P_ W w)
1439 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1440 rfeeds [rfeedcnt++] = w;
1444 feed_reverse_done (EV_P_ int revents)
1447 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1452 queue_events (EV_P_ W *events, int eventcnt, int type)
1456 for (i = 0; i < eventcnt; ++i)
1457 ev_feed_event (EV_A_ events [i], type);
1460 /*****************************************************************************/
1463 fd_event_nocheck (EV_P_ int fd, int revents)
1465 ANFD *anfd = anfds + fd;
1468 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1470 int ev = w->events & revents;
1473 ev_feed_event (EV_A_ (W)w, ev);
1477 /* do not submit kernel events for fds that have reify set */
1478 /* because that means they changed while we were polling for new events */
1480 fd_event (EV_P_ int fd, int revents)
1482 ANFD *anfd = anfds + fd;
1484 if (expect_true (!anfd->reify))
1485 fd_event_nocheck (EV_A_ fd, revents);
1489 ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
1491 if (fd >= 0 && fd < anfdmax)
1492 fd_event_nocheck (EV_A_ fd, revents);
1495 /* make sure the external fd watch events are in-sync */
1496 /* with the kernel/libev internal state */
1502 #if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1503 for (i = 0; i < fdchangecnt; ++i)
1505 int fd = fdchanges [i];
1506 ANFD *anfd = anfds + fd;
1508 if (anfd->reify & EV__IOFDSET && anfd->head)
1510 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1512 if (handle != anfd->handle)
1516 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1518 /* handle changed, but fd didn't - we need to do it in two steps */
1519 backend_modify (EV_A_ fd, anfd->events, 0);
1521 anfd->handle = handle;
1527 for (i = 0; i < fdchangecnt; ++i)
1529 int fd = fdchanges [i];
1530 ANFD *anfd = anfds + fd;
1533 unsigned char o_events = anfd->events;
1534 unsigned char o_reify = anfd->reify;
1538 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1542 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1543 anfd->events |= (unsigned char)w->events;
1545 if (o_events != anfd->events)
1546 o_reify = EV__IOFDSET; /* actually |= */
1549 if (o_reify & EV__IOFDSET)
1550 backend_modify (EV_A_ fd, o_events, anfd->events);
1556 /* something about the given fd changed */
1558 fd_change (EV_P_ int fd, int flags)
1560 unsigned char reify = anfds [fd].reify;
1561 anfds [fd].reify |= flags;
1563 if (expect_true (!reify))
1566 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
1567 fdchanges [fdchangecnt - 1] = fd;
1571 /* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1572 inline_speed void ecb_cold
1573 fd_kill (EV_P_ int fd)
1577 while ((w = (ev_io *)anfds [fd].head))
1579 ev_io_stop (EV_A_ w);
1580 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1584 /* check whether the given fd is actually valid, for error recovery */
1585 inline_size int ecb_cold
1589 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1591 return fcntl (fd, F_GETFD) != -1;
1595 /* called on EBADF to verify fds */
1596 static void noinline ecb_cold
1601 for (fd = 0; fd < anfdmax; ++fd)
1602 if (anfds [fd].events)
1603 if (!fd_valid (fd) && errno == EBADF)
1607 /* called on ENOMEM in select/poll to kill some fds and retry */
1608 static void noinline ecb_cold
1613 for (fd = anfdmax; fd--; )
1614 if (anfds [fd].events)
1621 /* usually called after fork if backend needs to re-arm all fds from scratch */
1622 static void noinline
1627 for (fd = 0; fd < anfdmax; ++fd)
1628 if (anfds [fd].events)
1630 anfds [fd].events = 0;
1631 anfds [fd].emask = 0;
1632 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1636 /* used to prepare libev internal fd's */
1637 /* this is not fork-safe */
1642 unsigned long arg = 1;
1643 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1645 fcntl (fd, F_SETFD, FD_CLOEXEC);
1646 fcntl (fd, F_SETFL, O_NONBLOCK);
1650 /*****************************************************************************/
1653 * the heap functions want a real array index. array index 0 is guaranteed to not
1654 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1655 * the branching factor of the d-tree.
1659 * at the moment we allow libev the luxury of two heaps,
1660 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1661 * which is more cache-efficient.
1662 * the difference is about 5% with 50000+ watchers.
1667 #define HEAP0 (DHEAP - 1) /* index of first element in heap */
1668 #define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1669 #define UPHEAP_DONE(p,k) ((p) == (k))
1671 /* away from the root */
1673 downheap (ANHE *heap, int N, int k)
1676 ANHE *E = heap + N + HEAP0;
1682 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1684 /* find minimum child */
1685 if (expect_true (pos + DHEAP - 1 < E))
1687 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1688 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1689 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1690 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1694 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1695 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1696 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1697 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1702 if (ANHE_at (he) <= minat)
1706 ev_active (ANHE_w (*minpos)) = k;
1712 ev_active (ANHE_w (he)) = k;
1718 #define HPARENT(k) ((k) >> 1)
1719 #define UPHEAP_DONE(p,k) (!(p))
1721 /* away from the root */
1723 downheap (ANHE *heap, int N, int k)
1734 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1737 if (ANHE_at (he) <= ANHE_at (heap [c]))
1740 heap [k] = heap [c];
1741 ev_active (ANHE_w (heap [k])) = k;
1747 ev_active (ANHE_w (he)) = k;
1751 /* towards the root */
1753 upheap (ANHE *heap, int k)
1759 int p = HPARENT (k);
1761 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1764 heap [k] = heap [p];
1765 ev_active (ANHE_w (heap [k])) = k;
1770 ev_active (ANHE_w (he)) = k;
1773 /* move an element suitably so it is in a correct place */
1775 adjustheap (ANHE *heap, int N, int k)
1777 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1780 downheap (heap, N, k);
1783 /* rebuild the heap: this function is used only once and executed rarely */
1785 reheap (ANHE *heap, int N)
1789 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1790 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1791 for (i = 0; i < N; ++i)
1792 upheap (heap, i + HEAP0);
1795 /*****************************************************************************/
1797 /* associate signal watchers to a signal signal */
1800 EV_ATOMIC_T pending;
1807 static ANSIG signals [EV_NSIG - 1];
1809 /*****************************************************************************/
1811 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1813 static void noinline ecb_cold
1816 if (!ev_is_active (&pipe_w))
1819 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1820 if (evfd < 0 && errno == EINVAL)
1821 evfd = eventfd (0, 0);
1826 fd_intern (evfd); /* doing it twice doesn't hurt */
1827 ev_io_set (&pipe_w, evfd, EV_READ);
1832 while (pipe (evpipe))
1833 ev_syserr ("(libev) error creating signal/async pipe");
1835 fd_intern (evpipe [0]);
1836 fd_intern (evpipe [1]);
1837 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1840 ev_io_start (EV_A_ &pipe_w);
1841 ev_unref (EV_A); /* watcher should not keep loop alive */
1846 evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1848 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1850 if (expect_true (*flag))
1855 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1857 pipe_write_skipped = 1;
1859 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1861 if (pipe_write_wanted)
1865 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1867 old_errno = errno; /* save errno because write will clobber it */
1872 uint64_t counter = 1;
1873 write (evfd, &counter, sizeof (uint64_t));
1883 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
1885 write (evpipe [1], &(evpipe [1]), 1);
1893 /* called whenever the libev signal pipe */
1894 /* got some events (signal, async) */
1896 pipecb (EV_P_ ev_io *iow, int revents)
1900 if (revents & EV_READ)
1906 read (evfd, &counter, sizeof (uint64_t));
1917 buf.len = sizeof (dummy);
1918 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
1920 read (evpipe [0], &dummy, sizeof (dummy));
1925 pipe_write_skipped = 0;
1927 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1929 #if EV_SIGNAL_ENABLE
1934 ECB_MEMORY_FENCE_RELEASE;
1936 for (i = EV_NSIG - 1; i--; )
1937 if (expect_false (signals [i].pending))
1938 ev_feed_signal_event (EV_A_ i + 1);
1947 ECB_MEMORY_FENCE_RELEASE;
1949 for (i = asynccnt; i--; )
1950 if (asyncs [i]->sent)
1952 asyncs [i]->sent = 0;
1953 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1959 /*****************************************************************************/
1962 ev_feed_signal (int signum) EV_THROW
1965 EV_P = signals [signum - 1].loop;
1971 if (!ev_active (&pipe_w))
1974 signals [signum - 1].pending = 1;
1975 evpipe_write (EV_A_ &sig_pending);
1979 ev_sighandler (int signum)
1982 signal (signum, ev_sighandler);
1985 ev_feed_signal (signum);
1989 ev_feed_signal_event (EV_P_ int signum) EV_THROW
1993 if (expect_false (signum <= 0 || signum > EV_NSIG))
1999 /* it is permissible to try to feed a signal to the wrong loop */
2000 /* or, likely more useful, feeding a signal nobody is waiting for */
2002 if (expect_false (signals [signum].loop != EV_A))
2006 signals [signum].pending = 0;
2008 for (w = signals [signum].head; w; w = w->next)
2009 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2014 sigfdcb (EV_P_ ev_io *iow, int revents)
2016 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2020 ssize_t res = read (sigfd, si, sizeof (si));
2022 /* not ISO-C, as res might be -1, but works with SuS */
2023 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2024 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2026 if (res < (ssize_t)sizeof (si))
2034 /*****************************************************************************/
2037 static WL childs [EV_PID_HASHSIZE];
2039 static ev_signal childev;
2041 #ifndef WIFCONTINUED
2042 # define WIFCONTINUED(status) 0
2045 /* handle a single child status event */
2047 child_reap (EV_P_ int chain, int pid, int status)
2050 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
2052 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2054 if ((w->pid == pid || !w->pid)
2055 && (!traced || (w->flags & 1)))
2057 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
2059 w->rstatus = status;
2060 ev_feed_event (EV_A_ (W)w, EV_CHILD);
2066 # define WCONTINUED 0
2069 /* called on sigchld etc., calls waitpid */
2071 childcb (EV_P_ ev_signal *sw, int revents)
2075 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
2076 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
2079 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
2082 /* make sure we are called again until all children have been reaped */
2083 /* we need to do it this way so that the callback gets called before we continue */
2084 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
2086 child_reap (EV_A_ pid, pid, status);
2087 if ((EV_PID_HASHSIZE) > 1)
2088 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
2093 /*****************************************************************************/
2096 # include "ev_iocp.c"
2099 # include "ev_port.c"
2102 # include "ev_kqueue.c"
2105 # include "ev_epoll.c"
2108 # include "ev_poll.c"
2111 # include "ev_select.c"
2115 ev_version_major (void) EV_THROW
2117 return EV_VERSION_MAJOR;
2121 ev_version_minor (void) EV_THROW
2123 return EV_VERSION_MINOR;
2126 /* return true if we are running with elevated privileges and should ignore env variables */
2127 int inline_size ecb_cold
2128 enable_secure (void)
2133 return getuid () != geteuid ()
2134 || getgid () != getegid ();
2138 unsigned int ecb_cold
2139 ev_supported_backends (void) EV_THROW
2141 unsigned int flags = 0;
2143 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2144 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
2145 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2146 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2147 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2152 unsigned int ecb_cold
2153 ev_recommended_backends (void) EV_THROW
2155 unsigned int flags = ev_supported_backends ();
2158 /* kqueue is borked on everything but netbsd apparently */
2159 /* it usually doesn't work correctly on anything but sockets and pipes */
2160 flags &= ~EVBACKEND_KQUEUE;
2163 /* only select works correctly on that "unix-certified" platform */
2164 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2165 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2168 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2174 unsigned int ecb_cold
2175 ev_embeddable_backends (void) EV_THROW
2177 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2179 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2180 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2181 flags &= ~EVBACKEND_EPOLL;
2187 ev_backend (EV_P) EV_THROW
2194 ev_iteration (EV_P) EV_THROW
2200 ev_depth (EV_P) EV_THROW
2206 ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2208 io_blocktime = interval;
2212 ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2214 timeout_blocktime = interval;
2218 ev_set_userdata (EV_P_ void *data) EV_THROW
2224 ev_userdata (EV_P) EV_THROW
2230 ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
2232 invoke_cb = invoke_pending_cb;
2236 ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2238 release_cb = release;
2239 acquire_cb = acquire;
2243 /* initialise a loop structure, must be zero-initialised */
2244 static void noinline ecb_cold
2245 loop_init (EV_P_ unsigned int flags) EV_THROW
2256 if (!clock_gettime (CLOCK_REALTIME, &ts))
2261 #if EV_USE_MONOTONIC
2262 if (!have_monotonic)
2266 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
2271 /* pid check not overridable via env */
2273 if (flags & EVFLAG_FORKCHECK)
2277 if (!(flags & EVFLAG_NOENV)
2278 && !enable_secure ()
2279 && getenv ("LIBEV_FLAGS"))
2280 flags = atoi (getenv ("LIBEV_FLAGS"));
2282 ev_rt_now = ev_time ();
2283 mn_now = get_clock ();
2285 rtmn_diff = ev_rt_now - mn_now;
2287 invoke_cb = ev_invoke_pending;
2291 timeout_blocktime = 0.;
2298 pipe_write_skipped = 0;
2299 pipe_write_wanted = 0;
2301 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2304 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2307 if (!(flags & EVBACKEND_MASK))
2308 flags |= ev_recommended_backends ();
2311 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2314 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
2317 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
2320 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
2323 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
2326 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
2329 ev_prepare_init (&pending_w, pendingcb);
2331 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2332 ev_init (&pipe_w, pipecb);
2333 ev_set_priority (&pipe_w, EV_MAXPRI);
2338 /* free up a loop structure */
2340 ev_loop_destroy (EV_P)
2345 /* mimic free (0) */
2350 #if EV_CLEANUP_ENABLE
2351 /* queue cleanup watchers (and execute them) */
2352 if (expect_false (cleanupcnt))
2354 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2360 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2362 ev_ref (EV_A); /* child watcher */
2363 ev_signal_stop (EV_A_ &childev);
2367 if (ev_is_active (&pipe_w))
2370 /*ev_io_stop (EV_A_ &pipe_w);*/
2377 if (evpipe [0] >= 0)
2379 EV_WIN32_CLOSE_FD (evpipe [0]);
2380 EV_WIN32_CLOSE_FD (evpipe [1]);
2385 if (ev_is_active (&sigfd_w))
2394 if (backend_fd >= 0)
2398 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2401 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
2404 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
2407 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
2410 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
2413 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
2416 for (i = NUMPRI; i--; )
2418 array_free (pending, [i]);
2420 array_free (idle, [i]);
2424 ev_free (anfds); anfds = 0; anfdmax = 0;
2426 /* have to use the microsoft-never-gets-it-right macro */
2427 array_free (rfeed, EMPTY);
2428 array_free (fdchange, EMPTY);
2429 array_free (timer, EMPTY);
2430 #if EV_PERIODIC_ENABLE
2431 array_free (periodic, EMPTY);
2434 array_free (fork, EMPTY);
2436 #if EV_CLEANUP_ENABLE
2437 array_free (cleanup, EMPTY);
2439 array_free (prepare, EMPTY);
2440 array_free (check, EMPTY);
2442 array_free (async, EMPTY);
2448 if (ev_is_default_loop (EV_A))
2450 ev_default_loop_ptr = 0;
2458 inline_size void infy_fork (EV_P);
2465 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
2468 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
2471 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
2477 if (ev_is_active (&pipe_w))
2479 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2482 ev_io_stop (EV_A_ &pipe_w);
2489 if (evpipe [0] >= 0)
2491 EV_WIN32_CLOSE_FD (evpipe [0]);
2492 EV_WIN32_CLOSE_FD (evpipe [1]);
2495 #if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2497 /* now iterate over everything, in case we missed something */
2498 pipecb (EV_A_ &pipe_w, EV_READ);
2507 struct ev_loop * ecb_cold
2508 ev_loop_new (unsigned int flags) EV_THROW
2510 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2512 memset (EV_A, 0, sizeof (struct ev_loop));
2513 loop_init (EV_A_ flags);
2515 if (ev_backend (EV_A))
2522 #endif /* multiplicity */
2525 static void noinline ecb_cold
2526 verify_watcher (EV_P_ W w)
2528 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2531 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2534 static void noinline ecb_cold
2535 verify_heap (EV_P_ ANHE *heap, int N)
2539 for (i = HEAP0; i < N + HEAP0; ++i)
2541 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2542 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2543 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2545 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2549 static void noinline ecb_cold
2550 array_verify (EV_P_ W *ws, int cnt)
2554 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2555 verify_watcher (EV_A_ ws [cnt]);
2562 ev_verify (EV_P) EV_THROW
2568 assert (activecnt >= -1);
2570 assert (fdchangemax >= fdchangecnt);
2571 for (i = 0; i < fdchangecnt; ++i)
2572 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2574 assert (anfdmax >= 0);
2575 for (i = 0; i < anfdmax; ++i)
2579 for (w = w2 = anfds [i].head; w; w = w->next)
2581 verify_watcher (EV_A_ (W)w);
2585 assert (("libev: io watcher list contains a loop", w != w2));
2589 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2590 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2594 assert (timermax >= timercnt);
2595 verify_heap (EV_A_ timers, timercnt);
2597 #if EV_PERIODIC_ENABLE
2598 assert (periodicmax >= periodiccnt);
2599 verify_heap (EV_A_ periodics, periodiccnt);
2602 for (i = NUMPRI; i--; )
2604 assert (pendingmax [i] >= pendingcnt [i]);
2606 assert (idleall >= 0);
2607 assert (idlemax [i] >= idlecnt [i]);
2608 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2613 assert (forkmax >= forkcnt);
2614 array_verify (EV_A_ (W *)forks, forkcnt);
2617 #if EV_CLEANUP_ENABLE
2618 assert (cleanupmax >= cleanupcnt);
2619 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2623 assert (asyncmax >= asynccnt);
2624 array_verify (EV_A_ (W *)asyncs, asynccnt);
2627 #if EV_PREPARE_ENABLE
2628 assert (preparemax >= preparecnt);
2629 array_verify (EV_A_ (W *)prepares, preparecnt);
2633 assert (checkmax >= checkcnt);
2634 array_verify (EV_A_ (W *)checks, checkcnt);
2639 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2640 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2648 struct ev_loop * ecb_cold
2652 ev_default_loop (unsigned int flags) EV_THROW
2654 if (!ev_default_loop_ptr)
2657 EV_P = ev_default_loop_ptr = &default_loop_struct;
2659 ev_default_loop_ptr = 1;
2662 loop_init (EV_A_ flags);
2664 if (ev_backend (EV_A))
2667 ev_signal_init (&childev, childcb, SIGCHLD);
2668 ev_set_priority (&childev, EV_MAXPRI);
2669 ev_signal_start (EV_A_ &childev);
2670 ev_unref (EV_A); /* child watcher should not keep loop alive */
2674 ev_default_loop_ptr = 0;
2677 return ev_default_loop_ptr;
2681 ev_loop_fork (EV_P) EV_THROW
2683 postfork = 1; /* must be in line with ev_default_fork */
2686 /*****************************************************************************/
2689 ev_invoke (EV_P_ void *w, int revents)
2691 EV_CB_INVOKE ((W)w, revents);
2695 ev_pending_count (EV_P) EV_THROW
2698 unsigned int count = 0;
2700 for (pri = NUMPRI; pri--; )
2701 count += pendingcnt [pri];
2707 ev_invoke_pending (EV_P)
2709 for (pendingpri = NUMPRI; pendingpri--; ) /* pendingpri is modified during the loop */
2710 while (pendingcnt [pendingpri])
2712 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2715 EV_CB_INVOKE (p->w, p->events);
2721 /* make idle watchers pending. this handles the "call-idle */
2722 /* only when higher priorities are idle" logic */
2726 if (expect_false (idleall))
2730 for (pri = NUMPRI; pri--; )
2732 if (pendingcnt [pri])
2737 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2745 /* make timers pending */
2751 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2755 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2757 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2759 /* first reschedule or stop timer */
2762 ev_at (w) += w->repeat;
2763 if (ev_at (w) < mn_now)
2766 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2768 ANHE_at_cache (timers [HEAP0]);
2769 downheap (timers, timercnt, HEAP0);
2772 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2775 feed_reverse (EV_A_ (W)w);
2777 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2779 feed_reverse_done (EV_A_ EV_TIMER);
2783 #if EV_PERIODIC_ENABLE
2785 static void noinline
2786 periodic_recalc (EV_P_ ev_periodic *w)
2788 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2789 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2791 /* the above almost always errs on the low side */
2792 while (at <= ev_rt_now)
2794 ev_tstamp nat = at + w->interval;
2796 /* when resolution fails us, we use ev_rt_now */
2797 if (expect_false (nat == at))
2809 /* make periodics pending */
2811 periodics_reify (EV_P)
2815 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2819 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2821 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2823 /* first reschedule or stop timer */
2824 if (w->reschedule_cb)
2826 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2828 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2830 ANHE_at_cache (periodics [HEAP0]);
2831 downheap (periodics, periodiccnt, HEAP0);
2833 else if (w->interval)
2835 periodic_recalc (EV_A_ w);
2836 ANHE_at_cache (periodics [HEAP0]);
2837 downheap (periodics, periodiccnt, HEAP0);
2840 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2843 feed_reverse (EV_A_ (W)w);
2845 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2847 feed_reverse_done (EV_A_ EV_PERIODIC);
2851 /* simply recalculate all periodics */
2852 /* TODO: maybe ensure that at least one event happens when jumping forward? */
2853 static void noinline ecb_cold
2854 periodics_reschedule (EV_P)
2858 /* adjust periodics after time jump */
2859 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2861 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2863 if (w->reschedule_cb)
2864 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2865 else if (w->interval)
2866 periodic_recalc (EV_A_ w);
2868 ANHE_at_cache (periodics [i]);
2871 reheap (periodics, periodiccnt);
2875 /* adjust all timers by a given offset */
2876 static void noinline ecb_cold
2877 timers_reschedule (EV_P_ ev_tstamp adjust)
2881 for (i = 0; i < timercnt; ++i)
2883 ANHE *he = timers + i + HEAP0;
2884 ANHE_w (*he)->at += adjust;
2885 ANHE_at_cache (*he);
2889 /* fetch new monotonic and realtime times from the kernel */
2890 /* also detect if there was a timejump, and act accordingly */
2892 time_update (EV_P_ ev_tstamp max_block)
2894 #if EV_USE_MONOTONIC
2895 if (expect_true (have_monotonic))
2898 ev_tstamp odiff = rtmn_diff;
2900 mn_now = get_clock ();
2902 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2903 /* interpolate in the meantime */
2904 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2906 ev_rt_now = rtmn_diff + mn_now;
2911 ev_rt_now = ev_time ();
2913 /* loop a few times, before making important decisions.
2914 * on the choice of "4": one iteration isn't enough,
2915 * in case we get preempted during the calls to
2916 * ev_time and get_clock. a second call is almost guaranteed
2917 * to succeed in that case, though. and looping a few more times
2918 * doesn't hurt either as we only do this on time-jumps or
2919 * in the unlikely event of having been preempted here.
2924 rtmn_diff = ev_rt_now - mn_now;
2926 diff = odiff - rtmn_diff;
2928 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2929 return; /* all is well */
2931 ev_rt_now = ev_time ();
2932 mn_now = get_clock ();
2936 /* no timer adjustment, as the monotonic clock doesn't jump */
2937 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2938 # if EV_PERIODIC_ENABLE
2939 periodics_reschedule (EV_A);
2945 ev_rt_now = ev_time ();
2947 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2949 /* adjust timers. this is easy, as the offset is the same for all of them */
2950 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2951 #if EV_PERIODIC_ENABLE
2952 periodics_reschedule (EV_A);
2961 ev_run (EV_P_ int flags)
2967 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2969 loop_done = EVBREAK_CANCEL;
2971 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2980 if (expect_false (curpid)) /* penalise the forking check even more */
2981 if (expect_false (getpid () != curpid))
2989 /* we might have forked, so queue fork handlers */
2990 if (expect_false (postfork))
2993 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2998 #if EV_PREPARE_ENABLE
2999 /* queue prepare watchers (and execute them) */
3000 if (expect_false (preparecnt))
3002 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
3007 if (expect_false (loop_done))
3010 /* we might have forked, so reify kernel state if necessary */
3011 if (expect_false (postfork))
3014 /* update fd-related kernel structures */
3017 /* calculate blocking time */
3019 ev_tstamp waittime = 0.;
3020 ev_tstamp sleeptime = 0.;
3022 /* remember old timestamp for io_blocktime calculation */
3023 ev_tstamp prev_mn_now = mn_now;
3025 /* update time to cancel out callback processing overhead */
3026 time_update (EV_A_ 1e100);
3028 /* from now on, we want a pipe-wake-up */
3029 pipe_write_wanted = 1;
3031 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3033 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
3035 waittime = MAX_BLOCKTIME;
3039 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
3040 if (waittime > to) waittime = to;
3043 #if EV_PERIODIC_ENABLE
3046 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
3047 if (waittime > to) waittime = to;
3051 /* don't let timeouts decrease the waittime below timeout_blocktime */
3052 if (expect_false (waittime < timeout_blocktime))
3053 waittime = timeout_blocktime;
3055 /* at this point, we NEED to wait, so we have to ensure */
3056 /* to pass a minimum nonzero value to the backend */
3057 if (expect_false (waittime < backend_mintime))
3058 waittime = backend_mintime;
3060 /* extra check because io_blocktime is commonly 0 */
3061 if (expect_false (io_blocktime))
3063 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3065 if (sleeptime > waittime - backend_mintime)
3066 sleeptime = waittime - backend_mintime;
3068 if (expect_true (sleeptime > 0.))
3070 ev_sleep (sleeptime);
3071 waittime -= sleeptime;
3079 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
3080 backend_poll (EV_A_ waittime);
3081 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3083 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3085 if (pipe_write_skipped)
3087 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3088 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3092 /* update ev_rt_now, do magic */
3093 time_update (EV_A_ waittime + sleeptime);
3096 /* queue pending timers and reschedule them */
3097 timers_reify (EV_A); /* relative timers called last */
3098 #if EV_PERIODIC_ENABLE
3099 periodics_reify (EV_A); /* absolute timers called first */
3103 /* queue idle watchers unless other events are pending */
3108 /* queue check watchers, to be executed first */
3109 if (expect_false (checkcnt))
3110 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3115 while (expect_true (
3118 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3121 if (loop_done == EVBREAK_ONE)
3122 loop_done = EVBREAK_CANCEL;
3132 ev_break (EV_P_ int how) EV_THROW
3138 ev_ref (EV_P) EV_THROW
3144 ev_unref (EV_P) EV_THROW
3150 ev_now_update (EV_P) EV_THROW
3152 time_update (EV_A_ 1e100);
3156 ev_suspend (EV_P) EV_THROW
3158 ev_now_update (EV_A);
3162 ev_resume (EV_P) EV_THROW
3164 ev_tstamp mn_prev = mn_now;
3166 ev_now_update (EV_A);
3167 timers_reschedule (EV_A_ mn_now - mn_prev);
3168 #if EV_PERIODIC_ENABLE
3169 /* TODO: really do this? */
3170 periodics_reschedule (EV_A);
3174 /*****************************************************************************/
3175 /* singly-linked list management, used when the expected list length is short */
3178 wlist_add (WL *head, WL elem)
3185 wlist_del (WL *head, WL elem)
3189 if (expect_true (*head == elem))
3195 head = &(*head)->next;
3199 /* internal, faster, version of ev_clear_pending */
3201 clear_pending (EV_P_ W w)
3205 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
3211 ev_clear_pending (EV_P_ void *w) EV_THROW
3214 int pending = w_->pending;
3216 if (expect_true (pending))
3218 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3219 p->w = (W)&pending_w;
3228 pri_adjust (EV_P_ W w)
3230 int pri = ev_priority (w);
3231 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3232 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3233 ev_set_priority (w, pri);
3237 ev_start (EV_P_ W w, int active)
3239 pri_adjust (EV_A_ w);
3251 /*****************************************************************************/
3254 ev_io_start (EV_P_ ev_io *w) EV_THROW
3258 if (expect_false (ev_is_active (w)))
3261 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3262 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3266 ev_start (EV_A_ (W)w, 1);
3267 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
3268 wlist_add (&anfds[fd].head, (WL)w);
3270 /* common bug, apparently */
3271 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3273 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3274 w->events &= ~EV__IOFDSET;
3280 ev_io_stop (EV_P_ ev_io *w) EV_THROW
3282 clear_pending (EV_A_ (W)w);
3283 if (expect_false (!ev_is_active (w)))
3286 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3290 wlist_del (&anfds[w->fd].head, (WL)w);
3291 ev_stop (EV_A_ (W)w);
3293 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3299 ev_timer_start (EV_P_ ev_timer *w) EV_THROW
3301 if (expect_false (ev_is_active (w)))
3304 ev_at (w) += mn_now;
3306 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
3311 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
3312 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
3313 ANHE_w (timers [ev_active (w)]) = (WT)w;
3314 ANHE_at_cache (timers [ev_active (w)]);
3315 upheap (timers, ev_active (w));
3319 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
3323 ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
3325 clear_pending (EV_A_ (W)w);
3326 if (expect_false (!ev_is_active (w)))
3332 int active = ev_active (w);
3334 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3338 if (expect_true (active < timercnt + HEAP0))
3340 timers [active] = timers [timercnt + HEAP0];
3341 adjustheap (timers, timercnt, active);
3345 ev_at (w) -= mn_now;
3347 ev_stop (EV_A_ (W)w);
3353 ev_timer_again (EV_P_ ev_timer *w) EV_THROW
3357 clear_pending (EV_A_ (W)w);
3359 if (ev_is_active (w))
3363 ev_at (w) = mn_now + w->repeat;
3364 ANHE_at_cache (timers [ev_active (w)]);
3365 adjustheap (timers, timercnt, ev_active (w));
3368 ev_timer_stop (EV_A_ w);
3372 ev_at (w) = w->repeat;
3373 ev_timer_start (EV_A_ w);
3380 ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3382 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3385 #if EV_PERIODIC_ENABLE
3387 ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
3389 if (expect_false (ev_is_active (w)))
3392 if (w->reschedule_cb)
3393 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3394 else if (w->interval)
3396 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
3397 periodic_recalc (EV_A_ w);
3400 ev_at (w) = w->offset;
3405 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
3406 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
3407 ANHE_w (periodics [ev_active (w)]) = (WT)w;
3408 ANHE_at_cache (periodics [ev_active (w)]);
3409 upheap (periodics, ev_active (w));
3413 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
3417 ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
3419 clear_pending (EV_A_ (W)w);
3420 if (expect_false (!ev_is_active (w)))
3426 int active = ev_active (w);
3428 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3432 if (expect_true (active < periodiccnt + HEAP0))
3434 periodics [active] = periodics [periodiccnt + HEAP0];
3435 adjustheap (periodics, periodiccnt, active);
3439 ev_stop (EV_A_ (W)w);
3445 ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
3447 /* TODO: use adjustheap and recalculation */
3448 ev_periodic_stop (EV_A_ w);
3449 ev_periodic_start (EV_A_ w);
3454 # define SA_RESTART 0
3457 #if EV_SIGNAL_ENABLE
3460 ev_signal_start (EV_P_ ev_signal *w) EV_THROW
3462 if (expect_false (ev_is_active (w)))
3465 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3468 assert (("libev: a signal must not be attached to two different loops",
3469 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3471 signals [w->signum - 1].loop = EV_A;
3479 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3480 if (sigfd < 0 && errno == EINVAL)
3481 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3485 fd_intern (sigfd); /* doing it twice will not hurt */
3487 sigemptyset (&sigfd_set);
3489 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3490 ev_set_priority (&sigfd_w, EV_MAXPRI);
3491 ev_io_start (EV_A_ &sigfd_w);
3492 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3498 /* TODO: check .head */
3499 sigaddset (&sigfd_set, w->signum);
3500 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3502 signalfd (sigfd, &sigfd_set, 0);
3506 ev_start (EV_A_ (W)w, 1);
3507 wlist_add (&signals [w->signum - 1].head, (WL)w);
3510 # if EV_USE_SIGNALFD
3511 if (sigfd < 0) /*TODO*/
3517 signal (w->signum, ev_sighandler);
3519 struct sigaction sa;
3523 sa.sa_handler = ev_sighandler;
3524 sigfillset (&sa.sa_mask);
3525 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3526 sigaction (w->signum, &sa, 0);
3528 if (origflags & EVFLAG_NOSIGMASK)
3530 sigemptyset (&sa.sa_mask);
3531 sigaddset (&sa.sa_mask, w->signum);
3532 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3541 ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
3543 clear_pending (EV_A_ (W)w);
3544 if (expect_false (!ev_is_active (w)))
3549 wlist_del (&signals [w->signum - 1].head, (WL)w);
3550 ev_stop (EV_A_ (W)w);
3552 if (!signals [w->signum - 1].head)
3555 signals [w->signum - 1].loop = 0; /* unattach from signal */
3563 sigaddset (&ss, w->signum);
3564 sigdelset (&sigfd_set, w->signum);
3566 signalfd (sigfd, &sigfd_set, 0);
3567 sigprocmask (SIG_UNBLOCK, &ss, 0);
3571 signal (w->signum, SIG_DFL);
3582 ev_child_start (EV_P_ ev_child *w) EV_THROW
3585 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3587 if (expect_false (ev_is_active (w)))
3592 ev_start (EV_A_ (W)w, 1);
3593 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3599 ev_child_stop (EV_P_ ev_child *w) EV_THROW
3601 clear_pending (EV_A_ (W)w);
3602 if (expect_false (!ev_is_active (w)))
3607 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3608 ev_stop (EV_A_ (W)w);
3619 # define lstat(a,b) _stati64 (a,b)
3622 #define DEF_STAT_INTERVAL 5.0074891
3623 #define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3624 #define MIN_STAT_INTERVAL 0.1074891
3626 static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3630 /* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3631 # define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3633 static void noinline
3634 infy_add (EV_P_ ev_stat *w)
3636 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
3642 /* now local changes will be tracked by inotify, but remote changes won't */
3643 /* unless the filesystem is known to be local, we therefore still poll */
3644 /* also do poll on <2.6.25, but with normal frequency */
3647 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3648 else if (!statfs (w->path, &sfs)
3649 && (sfs.f_type == 0x1373 /* devfs */
3650 || sfs.f_type == 0xEF53 /* ext2/3 */
3651 || sfs.f_type == 0x3153464a /* jfs */
3652 || sfs.f_type == 0x52654973 /* reiser3 */
3653 || sfs.f_type == 0x01021994 /* tempfs */
3654 || sfs.f_type == 0x58465342 /* xfs */))
3655 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3657 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3661 /* can't use inotify, continue to stat */
3662 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3664 /* if path is not there, monitor some parent directory for speedup hints */
3665 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3666 /* but an efficiency issue only */
3667 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
3670 strcpy (path, w->path);
3674 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
3675 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
3677 char *pend = strrchr (path, '/');
3679 if (!pend || pend == path)
3683 w->wd = inotify_add_watch (fs_fd, path, mask);
3685 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3690 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3692 /* now re-arm timer, if required */
3693 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3694 ev_timer_again (EV_A_ &w->timer);
3695 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3698 static void noinline
3699 infy_del (EV_P_ ev_stat *w)
3708 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3709 wlist_del (&fs_hash [slot].head, (WL)w);
3711 /* remove this watcher, if others are watching it, they will rearm */
3712 inotify_rm_watch (fs_fd, wd);
3715 static void noinline
3716 infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3719 /* overflow, need to check for all hash slots */
3720 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3721 infy_wd (EV_A_ slot, wd, ev);
3726 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3728 ev_stat *w = (ev_stat *)w_;
3729 w_ = w_->next; /* lets us remove this watcher and all before it */
3731 if (w->wd == wd || wd == -1)
3733 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3735 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3737 infy_add (EV_A_ w); /* re-add, no matter what */
3740 stat_timer_cb (EV_A_ &w->timer, 0);
3747 infy_cb (EV_P_ ev_io *w, int revents)
3749 char buf [EV_INOTIFY_BUFSIZE];
3751 int len = read (fs_fd, buf, sizeof (buf));
3753 for (ofs = 0; ofs < len; )
3755 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3756 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3757 ofs += sizeof (struct inotify_event) + ev->len;
3761 inline_size void ecb_cold
3762 ev_check_2625 (EV_P)
3764 /* kernels < 2.6.25 are borked
3765 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3767 if (ev_linux_version () < 0x020619)
3776 #if defined IN_CLOEXEC && defined IN_NONBLOCK
3777 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3781 return inotify_init ();
3792 ev_check_2625 (EV_A);
3794 fs_fd = infy_newfd ();
3799 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3800 ev_set_priority (&fs_w, EV_MAXPRI);
3801 ev_io_start (EV_A_ &fs_w);
3815 ev_io_stop (EV_A_ &fs_w);
3817 fs_fd = infy_newfd ();
3822 ev_io_set (&fs_w, fs_fd, EV_READ);
3823 ev_io_start (EV_A_ &fs_w);
3827 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3829 WL w_ = fs_hash [slot].head;
3830 fs_hash [slot].head = 0;
3834 ev_stat *w = (ev_stat *)w_;
3835 w_ = w_->next; /* lets us add this watcher */
3840 infy_add (EV_A_ w); /* re-add, no matter what */
3843 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3844 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3845 ev_timer_again (EV_A_ &w->timer);
3846 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3855 # define EV_LSTAT(p,b) _stati64 (p, b)
3857 # define EV_LSTAT(p,b) lstat (p, b)
3861 ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3863 if (lstat (w->path, &w->attr) < 0)
3864 w->attr.st_nlink = 0;
3865 else if (!w->attr.st_nlink)
3866 w->attr.st_nlink = 1;
3869 static void noinline
3870 stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3872 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3874 ev_statdata prev = w->attr;
3875 ev_stat_stat (EV_A_ w);
3877 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3879 prev.st_dev != w->attr.st_dev
3880 || prev.st_ino != w->attr.st_ino
3881 || prev.st_mode != w->attr.st_mode
3882 || prev.st_nlink != w->attr.st_nlink
3883 || prev.st_uid != w->attr.st_uid
3884 || prev.st_gid != w->attr.st_gid
3885 || prev.st_rdev != w->attr.st_rdev
3886 || prev.st_size != w->attr.st_size
3887 || prev.st_atime != w->attr.st_atime
3888 || prev.st_mtime != w->attr.st_mtime
3889 || prev.st_ctime != w->attr.st_ctime
3891 /* we only update w->prev on actual differences */
3892 /* in case we test more often than invoke the callback, */
3893 /* to ensure that prev is always different to attr */
3901 ev_stat_stat (EV_A_ w); /* avoid race... */
3905 ev_feed_event (EV_A_ w, EV_STAT);
3910 ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3912 if (expect_false (ev_is_active (w)))
3915 ev_stat_stat (EV_A_ w);
3917 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3918 w->interval = MIN_STAT_INTERVAL;
3920 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3921 ev_set_priority (&w->timer, ev_priority (w));
3931 ev_timer_again (EV_A_ &w->timer);
3935 ev_start (EV_A_ (W)w, 1);
3941 ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3943 clear_pending (EV_A_ (W)w);
3944 if (expect_false (!ev_is_active (w)))
3953 if (ev_is_active (&w->timer))
3956 ev_timer_stop (EV_A_ &w->timer);
3959 ev_stop (EV_A_ (W)w);
3967 ev_idle_start (EV_P_ ev_idle *w) EV_THROW
3969 if (expect_false (ev_is_active (w)))
3972 pri_adjust (EV_A_ (W)w);
3977 int active = ++idlecnt [ABSPRI (w)];
3980 ev_start (EV_A_ (W)w, active);
3982 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3983 idles [ABSPRI (w)][active - 1] = w;
3990 ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3992 clear_pending (EV_A_ (W)w);
3993 if (expect_false (!ev_is_active (w)))
3999 int active = ev_active (w);
4001 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
4002 ev_active (idles [ABSPRI (w)][active - 1]) = active;
4004 ev_stop (EV_A_ (W)w);
4012 #if EV_PREPARE_ENABLE
4014 ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
4016 if (expect_false (ev_is_active (w)))
4021 ev_start (EV_A_ (W)w, ++preparecnt);
4022 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
4023 prepares [preparecnt - 1] = w;
4029 ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
4031 clear_pending (EV_A_ (W)w);
4032 if (expect_false (!ev_is_active (w)))
4038 int active = ev_active (w);
4040 prepares [active - 1] = prepares [--preparecnt];
4041 ev_active (prepares [active - 1]) = active;
4044 ev_stop (EV_A_ (W)w);
4052 ev_check_start (EV_P_ ev_check *w) EV_THROW
4054 if (expect_false (ev_is_active (w)))
4059 ev_start (EV_A_ (W)w, ++checkcnt);
4060 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
4061 checks [checkcnt - 1] = w;
4067 ev_check_stop (EV_P_ ev_check *w) EV_THROW
4069 clear_pending (EV_A_ (W)w);
4070 if (expect_false (!ev_is_active (w)))
4076 int active = ev_active (w);
4078 checks [active - 1] = checks [--checkcnt];
4079 ev_active (checks [active - 1]) = active;
4082 ev_stop (EV_A_ (W)w);
4090 ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
4092 ev_run (w->other, EVRUN_NOWAIT);
4096 embed_io_cb (EV_P_ ev_io *io, int revents)
4098 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
4101 ev_feed_event (EV_A_ (W)w, EV_EMBED);
4103 ev_run (w->other, EVRUN_NOWAIT);
4107 embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4109 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4117 ev_run (EV_A_ EVRUN_NOWAIT);
4123 embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4125 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4127 ev_embed_stop (EV_A_ w);
4132 ev_loop_fork (EV_A);
4133 ev_run (EV_A_ EVRUN_NOWAIT);
4136 ev_embed_start (EV_A_ w);
4141 embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4143 ev_idle_stop (EV_A_ idle);
4148 ev_embed_start (EV_P_ ev_embed *w) EV_THROW
4150 if (expect_false (ev_is_active (w)))
4155 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4156 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4161 ev_set_priority (&w->io, ev_priority (w));
4162 ev_io_start (EV_A_ &w->io);
4164 ev_prepare_init (&w->prepare, embed_prepare_cb);
4165 ev_set_priority (&w->prepare, EV_MINPRI);
4166 ev_prepare_start (EV_A_ &w->prepare);
4168 ev_fork_init (&w->fork, embed_fork_cb);
4169 ev_fork_start (EV_A_ &w->fork);
4171 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4173 ev_start (EV_A_ (W)w, 1);
4179 ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
4181 clear_pending (EV_A_ (W)w);
4182 if (expect_false (!ev_is_active (w)))
4187 ev_io_stop (EV_A_ &w->io);
4188 ev_prepare_stop (EV_A_ &w->prepare);
4189 ev_fork_stop (EV_A_ &w->fork);
4191 ev_stop (EV_A_ (W)w);
4199 ev_fork_start (EV_P_ ev_fork *w) EV_THROW
4201 if (expect_false (ev_is_active (w)))
4206 ev_start (EV_A_ (W)w, ++forkcnt);
4207 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4208 forks [forkcnt - 1] = w;
4214 ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
4216 clear_pending (EV_A_ (W)w);
4217 if (expect_false (!ev_is_active (w)))
4223 int active = ev_active (w);
4225 forks [active - 1] = forks [--forkcnt];
4226 ev_active (forks [active - 1]) = active;
4229 ev_stop (EV_A_ (W)w);
4235 #if EV_CLEANUP_ENABLE
4237 ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4239 if (expect_false (ev_is_active (w)))
4244 ev_start (EV_A_ (W)w, ++cleanupcnt);
4245 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4246 cleanups [cleanupcnt - 1] = w;
4248 /* cleanup watchers should never keep a refcount on the loop */
4254 ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4256 clear_pending (EV_A_ (W)w);
4257 if (expect_false (!ev_is_active (w)))
4264 int active = ev_active (w);
4266 cleanups [active - 1] = cleanups [--cleanupcnt];
4267 ev_active (cleanups [active - 1]) = active;
4270 ev_stop (EV_A_ (W)w);
4278 ev_async_start (EV_P_ ev_async *w) EV_THROW
4280 if (expect_false (ev_is_active (w)))
4289 ev_start (EV_A_ (W)w, ++asynccnt);
4290 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4291 asyncs [asynccnt - 1] = w;
4297 ev_async_stop (EV_P_ ev_async *w) EV_THROW
4299 clear_pending (EV_A_ (W)w);
4300 if (expect_false (!ev_is_active (w)))
4306 int active = ev_active (w);
4308 asyncs [active - 1] = asyncs [--asynccnt];
4309 ev_active (asyncs [active - 1]) = active;
4312 ev_stop (EV_A_ (W)w);
4318 ev_async_send (EV_P_ ev_async *w) EV_THROW
4321 evpipe_write (EV_A_ &async_pending);
4325 /*****************************************************************************/
4331 void (*cb)(int revents, void *arg);
4336 once_cb (EV_P_ struct ev_once *once, int revents)
4338 void (*cb)(int revents, void *arg) = once->cb;
4339 void *arg = once->arg;
4341 ev_io_stop (EV_A_ &once->io);
4342 ev_timer_stop (EV_A_ &once->to);
4349 once_cb_io (EV_P_ ev_io *w, int revents)
4351 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4353 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
4357 once_cb_to (EV_P_ ev_timer *w, int revents)
4359 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4361 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
4365 ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
4367 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
4369 if (expect_false (!once))
4371 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
4378 ev_init (&once->io, once_cb_io);
4381 ev_io_set (&once->io, fd, events);
4382 ev_io_start (EV_A_ &once->io);
4385 ev_init (&once->to, once_cb_to);
4388 ev_timer_set (&once->to, timeout, 0.);
4389 ev_timer_start (EV_A_ &once->to);
4393 /*****************************************************************************/
4397 ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4400 ev_watcher_list *wl, *wn;
4402 if (types & (EV_IO | EV_EMBED))
4403 for (i = 0; i < anfdmax; ++i)
4404 for (wl = anfds [i].head; wl; )
4409 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4411 if (types & EV_EMBED)
4412 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4417 if (ev_cb ((ev_io *)wl) == infy_cb)
4421 if ((ev_io *)wl != &pipe_w)
4423 cb (EV_A_ EV_IO, wl);
4428 if (types & (EV_TIMER | EV_STAT))
4429 for (i = timercnt + HEAP0; i-- > HEAP0; )
4431 /*TODO: timer is not always active*/
4432 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4434 if (types & EV_STAT)
4435 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4439 if (types & EV_TIMER)
4440 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4442 #if EV_PERIODIC_ENABLE
4443 if (types & EV_PERIODIC)
4444 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4445 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4449 if (types & EV_IDLE)
4450 for (j = NUMPRI; j--; )
4451 for (i = idlecnt [j]; i--; )
4452 cb (EV_A_ EV_IDLE, idles [j][i]);
4456 if (types & EV_FORK)
4457 for (i = forkcnt; i--; )
4458 if (ev_cb (forks [i]) != embed_fork_cb)
4459 cb (EV_A_ EV_FORK, forks [i]);
4463 if (types & EV_ASYNC)
4464 for (i = asynccnt; i--; )
4465 cb (EV_A_ EV_ASYNC, asyncs [i]);
4468 #if EV_PREPARE_ENABLE
4469 if (types & EV_PREPARE)
4470 for (i = preparecnt; i--; )
4471 # if EV_EMBED_ENABLE
4472 if (ev_cb (prepares [i]) != embed_prepare_cb)
4474 cb (EV_A_ EV_PREPARE, prepares [i]);
4478 if (types & EV_CHECK)
4479 for (i = checkcnt; i--; )
4480 cb (EV_A_ EV_CHECK, checks [i]);
4483 #if EV_SIGNAL_ENABLE
4484 if (types & EV_SIGNAL)
4485 for (i = 0; i < EV_NSIG - 1; ++i)
4486 for (wl = signals [i].head; wl; )
4489 cb (EV_A_ EV_SIGNAL, wl);
4495 if (types & EV_CHILD)
4496 for (i = (EV_PID_HASHSIZE); i--; )
4497 for (wl = childs [i]; wl; )
4500 cb (EV_A_ EV_CHILD, wl);
4504 /* EV_STAT 0x00001000 /* stat data changed */
4505 /* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4510 #include "ev_wrap.h"