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Comparing libev/ev.c (file contents):
Revision 1.354 by root, Fri Oct 22 09:24:11 2010 UTC vs.
Revision 1.449 by root, Sun Sep 23 21:21:58 2012 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 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- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 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- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
43# include EV_CONFIG_H 43# include EV_CONFIG_H
44# else 44# else
45# include "config.h" 45# include "config.h"
46# endif 46# endif
47 47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
48# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
49# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
50# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
51# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
52# define EV_USE_REALTIME 0 58# define EV_USE_REALTIME 0
53# endif 59# endif
54# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
55# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
56# endif 62# endif
57# endif 63# endif
58# elif !defined(EV_USE_CLOCK_SYSCALL) 64# elif !defined EV_USE_CLOCK_SYSCALL
59# define EV_USE_CLOCK_SYSCALL 0 65# define EV_USE_CLOCK_SYSCALL 0
60# endif 66# endif
61 67
62# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
63# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
… …
156# define EV_USE_EVENTFD 0 162# define EV_USE_EVENTFD 0
157# endif 163# endif
158 164
159#endif 165#endif
160 166
161#include <math.h>
162#include <stdlib.h> 167#include <stdlib.h>
163#include <string.h> 168#include <string.h>
164#include <fcntl.h> 169#include <fcntl.h>
165#include <stddef.h> 170#include <stddef.h>
166 171
… …
178# include EV_H 183# include EV_H
179#else 184#else
180# include "ev.h" 185# include "ev.h"
181#endif 186#endif
182 187
183EV_CPP(extern "C" {) 188#if EV_NO_THREADS
189# undef EV_NO_SMP
190# define EV_NO_SMP 1
191# undef ECB_NO_THREADS
192# define ECB_NO_THREADS 1
193#endif
194#if EV_NO_SMP
195# undef EV_NO_SMP
196# define ECB_NO_SMP 1
197#endif
184 198
185#ifndef _WIN32 199#ifndef _WIN32
186# include <sys/time.h> 200# include <sys/time.h>
187# include <sys/wait.h> 201# include <sys/wait.h>
188# include <unistd.h> 202# include <unistd.h>
189#else 203#else
190# include <io.h> 204# include <io.h>
191# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
192# include <windows.h> 207# include <windows.h>
193# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
194# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
195# endif 210# endif
196# undef EV_AVOID_STDIO 211# undef EV_AVOID_STDIO
… …
205#define _DARWIN_UNLIMITED_SELECT 1 220#define _DARWIN_UNLIMITED_SELECT 1
206 221
207/* this block tries to deduce configuration from header-defined symbols and defaults */ 222/* this block tries to deduce configuration from header-defined symbols and defaults */
208 223
209/* try to deduce the maximum number of signals on this platform */ 224/* try to deduce the maximum number of signals on this platform */
210#if defined (EV_NSIG) 225#if defined EV_NSIG
211/* use what's provided */ 226/* use what's provided */
212#elif defined (NSIG) 227#elif defined NSIG
213# define EV_NSIG (NSIG) 228# define EV_NSIG (NSIG)
214#elif defined(_NSIG) 229#elif defined _NSIG
215# define EV_NSIG (_NSIG) 230# define EV_NSIG (_NSIG)
216#elif defined (SIGMAX) 231#elif defined SIGMAX
217# define EV_NSIG (SIGMAX+1) 232# define EV_NSIG (SIGMAX+1)
218#elif defined (SIG_MAX) 233#elif defined SIG_MAX
219# define EV_NSIG (SIG_MAX+1) 234# define EV_NSIG (SIG_MAX+1)
220#elif defined (_SIG_MAX) 235#elif defined _SIG_MAX
221# define EV_NSIG (_SIG_MAX+1) 236# define EV_NSIG (_SIG_MAX+1)
222#elif defined (MAXSIG) 237#elif defined MAXSIG
223# define EV_NSIG (MAXSIG+1) 238# define EV_NSIG (MAXSIG+1)
224#elif defined (MAX_SIG) 239#elif defined MAX_SIG
225# define EV_NSIG (MAX_SIG+1) 240# define EV_NSIG (MAX_SIG+1)
226#elif defined (SIGARRAYSIZE) 241#elif defined SIGARRAYSIZE
227# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
228#elif defined (_sys_nsig) 243#elif defined _sys_nsig
229# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
230#else 245#else
231# error "unable to find value for NSIG, please report" 246# error "unable to find value for NSIG, please report"
232/* to make it compile regardless, just remove the above line, */ 247/* to make it compile regardless, just remove the above line, */
233/* but consider reporting it, too! :) */ 248/* but consider reporting it, too! :) */
234# define EV_NSIG 65 249# define EV_NSIG 65
235#endif 250#endif
236 251
252#ifndef EV_USE_FLOOR
253# define EV_USE_FLOOR 0
254#endif
255
237#ifndef EV_USE_CLOCK_SYSCALL 256#ifndef EV_USE_CLOCK_SYSCALL
238# if __linux && __GLIBC__ >= 2 257# if __linux && __GLIBC__ >= 2
239# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 258# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240# else 259# else
241# define EV_USE_CLOCK_SYSCALL 0 260# define EV_USE_CLOCK_SYSCALL 0
242# endif 261# endif
243#endif 262#endif
244 263
245#ifndef EV_USE_MONOTONIC 264#ifndef EV_USE_MONOTONIC
246# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 265# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
247# define EV_USE_MONOTONIC EV_FEATURE_OS 266# define EV_USE_MONOTONIC EV_FEATURE_OS
248# else 267# else
249# define EV_USE_MONOTONIC 0 268# define EV_USE_MONOTONIC 0
250# endif 269# endif
251#endif 270#endif
… …
341#endif 360#endif
342 361
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 362/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
344/* which makes programs even slower. might work on other unices, too. */ 363/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL 364#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h> 365# include <sys/syscall.h>
347# ifdef SYS_clock_gettime 366# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 367# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC 368# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 1 369# define EV_USE_MONOTONIC 1
351# else 370# else
… …
376# undef EV_USE_INOTIFY 395# undef EV_USE_INOTIFY
377# define EV_USE_INOTIFY 0 396# define EV_USE_INOTIFY 0
378#endif 397#endif
379 398
380#if !EV_USE_NANOSLEEP 399#if !EV_USE_NANOSLEEP
381# ifndef _WIN32 400/* hp-ux has it in sys/time.h, which we unconditionally include above */
401# if !defined _WIN32 && !defined __hpux
382# include <sys/select.h> 402# include <sys/select.h>
383# endif 403# endif
384#endif 404#endif
385 405
386#if EV_USE_INOTIFY 406#if EV_USE_INOTIFY
387# include <sys/utsname.h>
388# include <sys/statfs.h> 407# include <sys/statfs.h>
389# include <sys/inotify.h> 408# include <sys/inotify.h>
390/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 409/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
391# ifndef IN_DONT_FOLLOW 410# ifndef IN_DONT_FOLLOW
392# undef EV_USE_INOTIFY 411# undef EV_USE_INOTIFY
393# define EV_USE_INOTIFY 0 412# define EV_USE_INOTIFY 0
394# endif 413# endif
395#endif
396
397#if EV_SELECT_IS_WINSOCKET
398# include <winsock.h>
399#endif 414#endif
400 415
401#if EV_USE_EVENTFD 416#if EV_USE_EVENTFD
402/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 417/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
403# include <stdint.h> 418# include <stdint.h>
… …
443#else 458#else
444# define EV_FREQUENT_CHECK do { } while (0) 459# define EV_FREQUENT_CHECK do { } while (0)
445#endif 460#endif
446 461
447/* 462/*
448 * This is used to avoid floating point rounding problems. 463 * This is used to work around floating point rounding problems.
449 * It is added to ev_rt_now when scheduling periodics
450 * to ensure progress, time-wise, even when rounding
451 * errors are against us.
452 * This value is good at least till the year 4000. 464 * This value is good at least till the year 4000.
453 * Better solutions welcome.
454 */ 465 */
455#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 466#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
467/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
456 468
457#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 469#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
458#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 470#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
459 471
460#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 472#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
461#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } 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)
462 474
475/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
476/* ECB.H BEGIN */
477/*
478 * libecb - http://software.schmorp.de/pkg/libecb
479 *
480 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
481 * Copyright (©) 2011 Emanuele Giaquinta
482 * All rights reserved.
483 *
484 * Redistribution and use in source and binary forms, with or without modifica-
485 * tion, are permitted provided that the following conditions are met:
486 *
487 * 1. Redistributions of source code must retain the above copyright notice,
488 * this list of conditions and the following disclaimer.
489 *
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.
493 *
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.
504 */
505
506#ifndef ECB_H
507#define ECB_H
508
509/* 16 bits major, 16 bits minor */
510#define ECB_VERSION 0x00010001
511
512#ifdef _WIN32
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;
463#if __GNUC__ >= 4 519 #if __GNUC__
464# define expect(expr,value) __builtin_expect ((expr),(value)) 520 typedef signed long long int64_t;
465# define noinline __attribute__ ((noinline)) 521 typedef unsigned long long uint64_t;
522 #else /* _MSC_VER || __BORLANDC__ */
523 typedef signed __int64 int64_t;
524 typedef unsigned __int64 uint64_t;
525 #endif
526 #ifdef _WIN64
527 #define ECB_PTRSIZE 8
528 typedef uint64_t uintptr_t;
529 typedef int64_t intptr_t;
530 #else
531 #define ECB_PTRSIZE 4
532 typedef uint32_t uintptr_t;
533 typedef int32_t intptr_t;
534 #endif
535 typedef intptr_t ptrdiff_t;
466#else 536#else
467# define expect(expr,value) (expr) 537 #include <inttypes.h>
468# define noinline 538 #if UINTMAX_MAX > 0xffffffffU
469# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 539 #define ECB_PTRSIZE 8
470# define inline 540 #else
541 #define ECB_PTRSIZE 4
542 #endif
471# endif 543#endif
544
545/* many compilers define _GNUC_ to some versions but then only implement
546 * what their idiot authors think are the "more important" extensions,
547 * causing enormous grief in return for some better fake benchmark numbers.
548 * or so.
549 * we try to detect these and simply assume they are not gcc - if they have
550 * an issue with that they should have done it right in the first place.
551 */
552#ifndef ECB_GCC_VERSION
553 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
554 #define ECB_GCC_VERSION(major,minor) 0
555 #else
556 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
472#endif 557 #endif
558#endif
473 559
560#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
561#define ECB_C99 (__STDC_VERSION__ >= 199901L)
562#define ECB_C11 (__STDC_VERSION__ >= 201112L)
563#define ECB_CPP (__cplusplus+0)
564#define ECB_CPP11 (__cplusplus >= 201103L)
565
566/*****************************************************************************/
567
568/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
569/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
570
571#if ECB_NO_THREADS
572 #define ECB_NO_SMP 1
573#endif
574
575#if ECB_NO_SMP
576 #define ECB_MEMORY_FENCE do { } while (0)
577#endif
578
579#ifndef ECB_MEMORY_FENCE
580 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
581 #if __i386 || __i386__
582 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
583 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
584 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
585 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
586 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
587 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
588 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
589 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
590 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
591 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
592 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
593 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
594 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
595 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
596 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
597 #elif __sparc || __sparc__
598 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
599 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
600 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
601 #elif defined __s390__ || defined __s390x__
602 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
603 #elif defined __mips__
604 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
605 #elif defined __alpha__
606 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
607 #elif defined __hppa__
608 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
609 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
610 #elif defined __ia64__
611 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
612 #endif
613 #endif
614#endif
615
616#ifndef ECB_MEMORY_FENCE
617 #if ECB_GCC_VERSION(4,7)
618 /* see comment below (stdatomic.h) about the C11 memory model. */
619 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
620 #elif defined __clang && __has_feature (cxx_atomic)
621 /* see comment below (stdatomic.h) about the C11 memory model. */
622 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
623 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
624 #define ECB_MEMORY_FENCE __sync_synchronize ()
625 #elif _MSC_VER >= 1400 /* VC++ 2005 */
626 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
627 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
628 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
629 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
630 #elif defined _WIN32
631 #include <WinNT.h>
632 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
633 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
634 #include <mbarrier.h>
635 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
636 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
637 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
638 #elif __xlC__
639 #define ECB_MEMORY_FENCE __sync ()
640 #endif
641#endif
642
643#ifndef ECB_MEMORY_FENCE
644 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
645 /* we assume that these memory fences work on all variables/all memory accesses, */
646 /* not just C11 atomics and atomic accesses */
647 #include <stdatomic.h>
648 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
649 /* any fence other than seq_cst, which isn't very efficient for us. */
650 /* Why that is, we don't know - either the C11 memory model is quite useless */
651 /* for most usages, or gcc and clang have a bug */
652 /* I *currently* lean towards the latter, and inefficiently implement */
653 /* all three of ecb's fences as a seq_cst fence */
654 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
655 #endif
656#endif
657
658#ifndef ECB_MEMORY_FENCE
659 #if !ECB_AVOID_PTHREADS
660 /*
661 * if you get undefined symbol references to pthread_mutex_lock,
662 * or failure to find pthread.h, then you should implement
663 * the ECB_MEMORY_FENCE operations for your cpu/compiler
664 * OR provide pthread.h and link against the posix thread library
665 * of your system.
666 */
667 #include <pthread.h>
668 #define ECB_NEEDS_PTHREADS 1
669 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
670
671 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
672 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
673 #endif
674#endif
675
676#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
677 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
678#endif
679
680#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
681 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
682#endif
683
684/*****************************************************************************/
685
686#if __cplusplus
687 #define ecb_inline static inline
688#elif ECB_GCC_VERSION(2,5)
689 #define ecb_inline static __inline__
690#elif ECB_C99
691 #define ecb_inline static inline
692#else
693 #define ecb_inline static
694#endif
695
696#if ECB_GCC_VERSION(3,3)
697 #define ecb_restrict __restrict__
698#elif ECB_C99
699 #define ecb_restrict restrict
700#else
701 #define ecb_restrict
702#endif
703
704typedef int ecb_bool;
705
706#define ECB_CONCAT_(a, b) a ## b
707#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
708#define ECB_STRINGIFY_(a) # a
709#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
710
711#define ecb_function_ ecb_inline
712
713#if ECB_GCC_VERSION(3,1)
714 #define ecb_attribute(attrlist) __attribute__(attrlist)
715 #define ecb_is_constant(expr) __builtin_constant_p (expr)
716 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
717 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
718#else
719 #define ecb_attribute(attrlist)
720 #define ecb_is_constant(expr) 0
721 #define ecb_expect(expr,value) (expr)
722 #define ecb_prefetch(addr,rw,locality)
723#endif
724
725/* no emulation for ecb_decltype */
726#if ECB_GCC_VERSION(4,5)
727 #define ecb_decltype(x) __decltype(x)
728#elif ECB_GCC_VERSION(3,0)
729 #define ecb_decltype(x) __typeof(x)
730#endif
731
732#define ecb_noinline ecb_attribute ((__noinline__))
733#define ecb_unused ecb_attribute ((__unused__))
734#define ecb_const ecb_attribute ((__const__))
735#define ecb_pure ecb_attribute ((__pure__))
736
737#if ECB_C11
738 #define ecb_noreturn _Noreturn
739#else
740 #define ecb_noreturn ecb_attribute ((__noreturn__))
741#endif
742
743#if ECB_GCC_VERSION(4,3)
744 #define ecb_artificial ecb_attribute ((__artificial__))
745 #define ecb_hot ecb_attribute ((__hot__))
746 #define ecb_cold ecb_attribute ((__cold__))
747#else
748 #define ecb_artificial
749 #define ecb_hot
750 #define ecb_cold
751#endif
752
753/* put around conditional expressions if you are very sure that the */
754/* expression is mostly true or mostly false. note that these return */
755/* booleans, not the expression. */
474#define expect_false(expr) expect ((expr) != 0, 0) 756#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475#define expect_true(expr) expect ((expr) != 0, 1) 757#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
758/* for compatibility to the rest of the world */
759#define ecb_likely(expr) ecb_expect_true (expr)
760#define ecb_unlikely(expr) ecb_expect_false (expr)
761
762/* count trailing zero bits and count # of one bits */
763#if ECB_GCC_VERSION(3,4)
764 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
765 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
766 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
767 #define ecb_ctz32(x) __builtin_ctz (x)
768 #define ecb_ctz64(x) __builtin_ctzll (x)
769 #define ecb_popcount32(x) __builtin_popcount (x)
770 /* no popcountll */
771#else
772 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
773 ecb_function_ int
774 ecb_ctz32 (uint32_t x)
775 {
776 int r = 0;
777
778 x &= ~x + 1; /* this isolates the lowest bit */
779
780#if ECB_branchless_on_i386
781 r += !!(x & 0xaaaaaaaa) << 0;
782 r += !!(x & 0xcccccccc) << 1;
783 r += !!(x & 0xf0f0f0f0) << 2;
784 r += !!(x & 0xff00ff00) << 3;
785 r += !!(x & 0xffff0000) << 4;
786#else
787 if (x & 0xaaaaaaaa) r += 1;
788 if (x & 0xcccccccc) r += 2;
789 if (x & 0xf0f0f0f0) r += 4;
790 if (x & 0xff00ff00) r += 8;
791 if (x & 0xffff0000) r += 16;
792#endif
793
794 return r;
795 }
796
797 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
798 ecb_function_ int
799 ecb_ctz64 (uint64_t x)
800 {
801 int shift = x & 0xffffffffU ? 0 : 32;
802 return ecb_ctz32 (x >> shift) + shift;
803 }
804
805 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
806 ecb_function_ int
807 ecb_popcount32 (uint32_t x)
808 {
809 x -= (x >> 1) & 0x55555555;
810 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
811 x = ((x >> 4) + x) & 0x0f0f0f0f;
812 x *= 0x01010101;
813
814 return x >> 24;
815 }
816
817 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
818 ecb_function_ int ecb_ld32 (uint32_t x)
819 {
820 int r = 0;
821
822 if (x >> 16) { x >>= 16; r += 16; }
823 if (x >> 8) { x >>= 8; r += 8; }
824 if (x >> 4) { x >>= 4; r += 4; }
825 if (x >> 2) { x >>= 2; r += 2; }
826 if (x >> 1) { r += 1; }
827
828 return r;
829 }
830
831 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
832 ecb_function_ int ecb_ld64 (uint64_t x)
833 {
834 int r = 0;
835
836 if (x >> 32) { x >>= 32; r += 32; }
837
838 return r + ecb_ld32 (x);
839 }
840#endif
841
842ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
843ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
844ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
845ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
846
847ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
848ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
849{
850 return ( (x * 0x0802U & 0x22110U)
851 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
852}
853
854ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
855ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
856{
857 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
858 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
859 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
860 x = ( x >> 8 ) | ( x << 8);
861
862 return x;
863}
864
865ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
866ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
867{
868 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
869 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
870 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
871 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
872 x = ( x >> 16 ) | ( x << 16);
873
874 return x;
875}
876
877/* popcount64 is only available on 64 bit cpus as gcc builtin */
878/* so for this version we are lazy */
879ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
880ecb_function_ int
881ecb_popcount64 (uint64_t x)
882{
883 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
884}
885
886ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
887ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
888ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
889ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
890ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
891ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
892ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
893ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
894
895ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
896ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
897ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
898ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
899ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
900ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
901ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
902ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
903
904#if ECB_GCC_VERSION(4,3)
905 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
906 #define ecb_bswap32(x) __builtin_bswap32 (x)
907 #define ecb_bswap64(x) __builtin_bswap64 (x)
908#else
909 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
910 ecb_function_ uint16_t
911 ecb_bswap16 (uint16_t x)
912 {
913 return ecb_rotl16 (x, 8);
914 }
915
916 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
917 ecb_function_ uint32_t
918 ecb_bswap32 (uint32_t x)
919 {
920 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
921 }
922
923 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
924 ecb_function_ uint64_t
925 ecb_bswap64 (uint64_t x)
926 {
927 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
928 }
929#endif
930
931#if ECB_GCC_VERSION(4,5)
932 #define ecb_unreachable() __builtin_unreachable ()
933#else
934 /* this seems to work fine, but gcc always emits a warning for it :/ */
935 ecb_inline void ecb_unreachable (void) ecb_noreturn;
936 ecb_inline void ecb_unreachable (void) { }
937#endif
938
939/* try to tell the compiler that some condition is definitely true */
940#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
941
942ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
943ecb_inline unsigned char
944ecb_byteorder_helper (void)
945{
946 const uint32_t u = 0x11223344;
947 return *(unsigned char *)&u;
948}
949
950ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
951ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
952ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
953ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
954
955#if ECB_GCC_VERSION(3,0) || ECB_C99
956 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
957#else
958 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
959#endif
960
961#if __cplusplus
962 template<typename T>
963 static inline T ecb_div_rd (T val, T div)
964 {
965 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
966 }
967 template<typename T>
968 static inline T ecb_div_ru (T val, T div)
969 {
970 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
971 }
972#else
973 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
974 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
975#endif
976
977#if ecb_cplusplus_does_not_suck
978 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
979 template<typename T, int N>
980 static inline int ecb_array_length (const T (&arr)[N])
981 {
982 return N;
983 }
984#else
985 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
986#endif
987
988#endif
989
990/* ECB.H END */
991
992#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
993/* if your architecture doesn't need memory fences, e.g. because it is
994 * single-cpu/core, or if you use libev in a project that doesn't use libev
995 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
996 * libev, in which cases the memory fences become nops.
997 * alternatively, you can remove this #error and link against libpthread,
998 * which will then provide the memory fences.
999 */
1000# error "memory fences not defined for your architecture, please report"
1001#endif
1002
1003#ifndef ECB_MEMORY_FENCE
1004# define ECB_MEMORY_FENCE do { } while (0)
1005# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1006# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1007#endif
1008
1009#define expect_false(cond) ecb_expect_false (cond)
1010#define expect_true(cond) ecb_expect_true (cond)
1011#define noinline ecb_noinline
1012
476#define inline_size static inline 1013#define inline_size ecb_inline
477 1014
478#if EV_FEATURE_CODE 1015#if EV_FEATURE_CODE
479# define inline_speed static inline 1016# define inline_speed ecb_inline
480#else 1017#else
481# define inline_speed static noinline 1018# define inline_speed static noinline
482#endif 1019#endif
483 1020
484#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1021#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
… …
523# include "ev_win32.c" 1060# include "ev_win32.c"
524#endif 1061#endif
525 1062
526/*****************************************************************************/ 1063/*****************************************************************************/
527 1064
1065/* define a suitable floor function (only used by periodics atm) */
1066
1067#if EV_USE_FLOOR
1068# include <math.h>
1069# define ev_floor(v) floor (v)
1070#else
1071
1072#include <float.h>
1073
1074/* a floor() replacement function, should be independent of ev_tstamp type */
1075static ev_tstamp noinline
1076ev_floor (ev_tstamp v)
1077{
1078 /* the choice of shift factor is not terribly important */
1079#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1080 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1081#else
1082 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1083#endif
1084
1085 /* argument too large for an unsigned long? */
1086 if (expect_false (v >= shift))
1087 {
1088 ev_tstamp f;
1089
1090 if (v == v - 1.)
1091 return v; /* very large number */
1092
1093 f = shift * ev_floor (v * (1. / shift));
1094 return f + ev_floor (v - f);
1095 }
1096
1097 /* special treatment for negative args? */
1098 if (expect_false (v < 0.))
1099 {
1100 ev_tstamp f = -ev_floor (-v);
1101
1102 return f - (f == v ? 0 : 1);
1103 }
1104
1105 /* fits into an unsigned long */
1106 return (unsigned long)v;
1107}
1108
1109#endif
1110
1111/*****************************************************************************/
1112
1113#ifdef __linux
1114# include <sys/utsname.h>
1115#endif
1116
1117static unsigned int noinline ecb_cold
1118ev_linux_version (void)
1119{
1120#ifdef __linux
1121 unsigned int v = 0;
1122 struct utsname buf;
1123 int i;
1124 char *p = buf.release;
1125
1126 if (uname (&buf))
1127 return 0;
1128
1129 for (i = 3+1; --i; )
1130 {
1131 unsigned int c = 0;
1132
1133 for (;;)
1134 {
1135 if (*p >= '0' && *p <= '9')
1136 c = c * 10 + *p++ - '0';
1137 else
1138 {
1139 p += *p == '.';
1140 break;
1141 }
1142 }
1143
1144 v = (v << 8) | c;
1145 }
1146
1147 return v;
1148#else
1149 return 0;
1150#endif
1151}
1152
1153/*****************************************************************************/
1154
528#if EV_AVOID_STDIO 1155#if EV_AVOID_STDIO
529static void noinline 1156static void noinline ecb_cold
530ev_printerr (const char *msg) 1157ev_printerr (const char *msg)
531{ 1158{
532 write (STDERR_FILENO, msg, strlen (msg)); 1159 write (STDERR_FILENO, msg, strlen (msg));
533} 1160}
534#endif 1161#endif
535 1162
536static void (*syserr_cb)(const char *msg); 1163static void (*syserr_cb)(const char *msg) EV_THROW;
537 1164
538void 1165void ecb_cold
539ev_set_syserr_cb (void (*cb)(const char *msg)) 1166ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
540{ 1167{
541 syserr_cb = cb; 1168 syserr_cb = cb;
542} 1169}
543 1170
544static void noinline 1171static void noinline ecb_cold
545ev_syserr (const char *msg) 1172ev_syserr (const char *msg)
546{ 1173{
547 if (!msg) 1174 if (!msg)
548 msg = "(libev) system error"; 1175 msg = "(libev) system error";
549 1176
550 if (syserr_cb) 1177 if (syserr_cb)
551 syserr_cb (msg); 1178 syserr_cb (msg);
552 else 1179 else
553 { 1180 {
554#if EV_AVOID_STDIO 1181#if EV_AVOID_STDIO
555 const char *err = strerror (errno);
556
557 ev_printerr (msg); 1182 ev_printerr (msg);
558 ev_printerr (": "); 1183 ev_printerr (": ");
559 ev_printerr (err); 1184 ev_printerr (strerror (errno));
560 ev_printerr ("\n"); 1185 ev_printerr ("\n");
561#else 1186#else
562 perror (msg); 1187 perror (msg);
563#endif 1188#endif
564 abort (); 1189 abort ();
565 } 1190 }
566} 1191}
567 1192
568static void * 1193static void *
569ev_realloc_emul (void *ptr, long size) 1194ev_realloc_emul (void *ptr, long size) EV_THROW
570{ 1195{
571#if __GLIBC__
572 return realloc (ptr, size);
573#else
574 /* some systems, notably openbsd and darwin, fail to properly 1196 /* some systems, notably openbsd and darwin, fail to properly
575 * implement realloc (x, 0) (as required by both ansi c-89 and 1197 * implement realloc (x, 0) (as required by both ansi c-89 and
576 * the single unix specification, so work around them here. 1198 * the single unix specification, so work around them here.
1199 * recently, also (at least) fedora and debian started breaking it,
1200 * despite documenting it otherwise.
577 */ 1201 */
578 1202
579 if (size) 1203 if (size)
580 return realloc (ptr, size); 1204 return realloc (ptr, size);
581 1205
582 free (ptr); 1206 free (ptr);
583 return 0; 1207 return 0;
584#endif
585} 1208}
586 1209
587static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1210static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
588 1211
589void 1212void ecb_cold
590ev_set_allocator (void *(*cb)(void *ptr, long size)) 1213ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
591{ 1214{
592 alloc = cb; 1215 alloc = cb;
593} 1216}
594 1217
595inline_speed void * 1218inline_speed void *
… …
598 ptr = alloc (ptr, size); 1221 ptr = alloc (ptr, size);
599 1222
600 if (!ptr && size) 1223 if (!ptr && size)
601 { 1224 {
602#if EV_AVOID_STDIO 1225#if EV_AVOID_STDIO
603 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1226 ev_printerr ("(libev) memory allocation failed, aborting.\n");
604#else 1227#else
605 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1228 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
606#endif 1229#endif
607 abort (); 1230 abort ();
608 } 1231 }
609 1232
610 return ptr; 1233 return ptr;
… …
627 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1250 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
628 unsigned char unused; 1251 unsigned char unused;
629#if EV_USE_EPOLL 1252#if EV_USE_EPOLL
630 unsigned int egen; /* generation counter to counter epoll bugs */ 1253 unsigned int egen; /* generation counter to counter epoll bugs */
631#endif 1254#endif
632#if EV_SELECT_IS_WINSOCKET 1255#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
633 SOCKET handle; 1256 SOCKET handle;
1257#endif
1258#if EV_USE_IOCP
1259 OVERLAPPED or, ow;
634#endif 1260#endif
635} ANFD; 1261} ANFD;
636 1262
637/* stores the pending event set for a given watcher */ 1263/* stores the pending event set for a given watcher */
638typedef struct 1264typedef struct
… …
680 #undef VAR 1306 #undef VAR
681 }; 1307 };
682 #include "ev_wrap.h" 1308 #include "ev_wrap.h"
683 1309
684 static struct ev_loop default_loop_struct; 1310 static struct ev_loop default_loop_struct;
685 struct ev_loop *ev_default_loop_ptr; 1311 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
686 1312
687#else 1313#else
688 1314
689 ev_tstamp ev_rt_now; 1315 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
690 #define VAR(name,decl) static decl; 1316 #define VAR(name,decl) static decl;
691 #include "ev_vars.h" 1317 #include "ev_vars.h"
692 #undef VAR 1318 #undef VAR
693 1319
694 static int ev_default_loop_ptr; 1320 static int ev_default_loop_ptr;
… …
709 1335
710/*****************************************************************************/ 1336/*****************************************************************************/
711 1337
712#ifndef EV_HAVE_EV_TIME 1338#ifndef EV_HAVE_EV_TIME
713ev_tstamp 1339ev_tstamp
714ev_time (void) 1340ev_time (void) EV_THROW
715{ 1341{
716#if EV_USE_REALTIME 1342#if EV_USE_REALTIME
717 if (expect_true (have_realtime)) 1343 if (expect_true (have_realtime))
718 { 1344 {
719 struct timespec ts; 1345 struct timespec ts;
… …
743 return ev_time (); 1369 return ev_time ();
744} 1370}
745 1371
746#if EV_MULTIPLICITY 1372#if EV_MULTIPLICITY
747ev_tstamp 1373ev_tstamp
748ev_now (EV_P) 1374ev_now (EV_P) EV_THROW
749{ 1375{
750 return ev_rt_now; 1376 return ev_rt_now;
751} 1377}
752#endif 1378#endif
753 1379
754void 1380void
755ev_sleep (ev_tstamp delay) 1381ev_sleep (ev_tstamp delay) EV_THROW
756{ 1382{
757 if (delay > 0.) 1383 if (delay > 0.)
758 { 1384 {
759#if EV_USE_NANOSLEEP 1385#if EV_USE_NANOSLEEP
760 struct timespec ts; 1386 struct timespec ts;
761 1387
762 EV_TS_SET (ts, delay); 1388 EV_TS_SET (ts, delay);
763 nanosleep (&ts, 0); 1389 nanosleep (&ts, 0);
764#elif defined(_WIN32) 1390#elif defined _WIN32
765 Sleep ((unsigned long)(delay * 1e3)); 1391 Sleep ((unsigned long)(delay * 1e3));
766#else 1392#else
767 struct timeval tv; 1393 struct timeval tv;
768 1394
769 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1395 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
788 1414
789 do 1415 do
790 ncur <<= 1; 1416 ncur <<= 1;
791 while (cnt > ncur); 1417 while (cnt > ncur);
792 1418
793 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1419 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
794 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1420 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
795 { 1421 {
796 ncur *= elem; 1422 ncur *= elem;
797 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1423 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
798 ncur = ncur - sizeof (void *) * 4; 1424 ncur = ncur - sizeof (void *) * 4;
… …
800 } 1426 }
801 1427
802 return ncur; 1428 return ncur;
803} 1429}
804 1430
805static noinline void * 1431static void * noinline ecb_cold
806array_realloc (int elem, void *base, int *cur, int cnt) 1432array_realloc (int elem, void *base, int *cur, int cnt)
807{ 1433{
808 *cur = array_nextsize (elem, *cur, cnt); 1434 *cur = array_nextsize (elem, *cur, cnt);
809 return ev_realloc (base, elem * *cur); 1435 return ev_realloc (base, elem * *cur);
810} 1436}
… …
813 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1439 memset ((void *)(base), 0, sizeof (*(base)) * (count))
814 1440
815#define array_needsize(type,base,cur,cnt,init) \ 1441#define array_needsize(type,base,cur,cnt,init) \
816 if (expect_false ((cnt) > (cur))) \ 1442 if (expect_false ((cnt) > (cur))) \
817 { \ 1443 { \
818 int ocur_ = (cur); \ 1444 int ecb_unused ocur_ = (cur); \
819 (base) = (type *)array_realloc \ 1445 (base) = (type *)array_realloc \
820 (sizeof (type), (base), &(cur), (cnt)); \ 1446 (sizeof (type), (base), &(cur), (cnt)); \
821 init ((base) + (ocur_), (cur) - ocur_); \ 1447 init ((base) + (ocur_), (cur) - ocur_); \
822 } 1448 }
823 1449
… …
841pendingcb (EV_P_ ev_prepare *w, int revents) 1467pendingcb (EV_P_ ev_prepare *w, int revents)
842{ 1468{
843} 1469}
844 1470
845void noinline 1471void noinline
846ev_feed_event (EV_P_ void *w, int revents) 1472ev_feed_event (EV_P_ void *w, int revents) EV_THROW
847{ 1473{
848 W w_ = (W)w; 1474 W w_ = (W)w;
849 int pri = ABSPRI (w_); 1475 int pri = ABSPRI (w_);
850 1476
851 if (expect_false (w_->pending)) 1477 if (expect_false (w_->pending))
… …
855 w_->pending = ++pendingcnt [pri]; 1481 w_->pending = ++pendingcnt [pri];
856 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1482 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
857 pendings [pri][w_->pending - 1].w = w_; 1483 pendings [pri][w_->pending - 1].w = w_;
858 pendings [pri][w_->pending - 1].events = revents; 1484 pendings [pri][w_->pending - 1].events = revents;
859 } 1485 }
1486
1487 pendingpri = NUMPRI - 1;
860} 1488}
861 1489
862inline_speed void 1490inline_speed void
863feed_reverse (EV_P_ W w) 1491feed_reverse (EV_P_ W w)
864{ 1492{
… …
910 if (expect_true (!anfd->reify)) 1538 if (expect_true (!anfd->reify))
911 fd_event_nocheck (EV_A_ fd, revents); 1539 fd_event_nocheck (EV_A_ fd, revents);
912} 1540}
913 1541
914void 1542void
915ev_feed_fd_event (EV_P_ int fd, int revents) 1543ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
916{ 1544{
917 if (fd >= 0 && fd < anfdmax) 1545 if (fd >= 0 && fd < anfdmax)
918 fd_event_nocheck (EV_A_ fd, revents); 1546 fd_event_nocheck (EV_A_ fd, revents);
919} 1547}
920 1548
… …
923inline_size void 1551inline_size void
924fd_reify (EV_P) 1552fd_reify (EV_P)
925{ 1553{
926 int i; 1554 int i;
927 1555
1556#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1557 for (i = 0; i < fdchangecnt; ++i)
1558 {
1559 int fd = fdchanges [i];
1560 ANFD *anfd = anfds + fd;
1561
1562 if (anfd->reify & EV__IOFDSET && anfd->head)
1563 {
1564 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1565
1566 if (handle != anfd->handle)
1567 {
1568 unsigned long arg;
1569
1570 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1571
1572 /* handle changed, but fd didn't - we need to do it in two steps */
1573 backend_modify (EV_A_ fd, anfd->events, 0);
1574 anfd->events = 0;
1575 anfd->handle = handle;
1576 }
1577 }
1578 }
1579#endif
1580
928 for (i = 0; i < fdchangecnt; ++i) 1581 for (i = 0; i < fdchangecnt; ++i)
929 { 1582 {
930 int fd = fdchanges [i]; 1583 int fd = fdchanges [i];
931 ANFD *anfd = anfds + fd; 1584 ANFD *anfd = anfds + fd;
932 ev_io *w; 1585 ev_io *w;
… …
934 unsigned char o_events = anfd->events; 1587 unsigned char o_events = anfd->events;
935 unsigned char o_reify = anfd->reify; 1588 unsigned char o_reify = anfd->reify;
936 1589
937 anfd->reify = 0; 1590 anfd->reify = 0;
938 1591
939#if EV_SELECT_IS_WINSOCKET
940 if (o_reify & EV__IOFDSET)
941 {
942 unsigned long arg;
943 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
944 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
945 }
946#endif
947
948 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 1592 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
949 { 1593 {
950 anfd->events = 0; 1594 anfd->events = 0;
951 1595
952 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1596 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
977 fdchanges [fdchangecnt - 1] = fd; 1621 fdchanges [fdchangecnt - 1] = fd;
978 } 1622 }
979} 1623}
980 1624
981/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1625/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
982inline_speed void 1626inline_speed void ecb_cold
983fd_kill (EV_P_ int fd) 1627fd_kill (EV_P_ int fd)
984{ 1628{
985 ev_io *w; 1629 ev_io *w;
986 1630
987 while ((w = (ev_io *)anfds [fd].head)) 1631 while ((w = (ev_io *)anfds [fd].head))
… …
990 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1634 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
991 } 1635 }
992} 1636}
993 1637
994/* check whether the given fd is actually valid, for error recovery */ 1638/* check whether the given fd is actually valid, for error recovery */
995inline_size int 1639inline_size int ecb_cold
996fd_valid (int fd) 1640fd_valid (int fd)
997{ 1641{
998#ifdef _WIN32 1642#ifdef _WIN32
999 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1643 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1000#else 1644#else
1001 return fcntl (fd, F_GETFD) != -1; 1645 return fcntl (fd, F_GETFD) != -1;
1002#endif 1646#endif
1003} 1647}
1004 1648
1005/* called on EBADF to verify fds */ 1649/* called on EBADF to verify fds */
1006static void noinline 1650static void noinline ecb_cold
1007fd_ebadf (EV_P) 1651fd_ebadf (EV_P)
1008{ 1652{
1009 int fd; 1653 int fd;
1010 1654
1011 for (fd = 0; fd < anfdmax; ++fd) 1655 for (fd = 0; fd < anfdmax; ++fd)
… …
1013 if (!fd_valid (fd) && errno == EBADF) 1657 if (!fd_valid (fd) && errno == EBADF)
1014 fd_kill (EV_A_ fd); 1658 fd_kill (EV_A_ fd);
1015} 1659}
1016 1660
1017/* called on ENOMEM in select/poll to kill some fds and retry */ 1661/* called on ENOMEM in select/poll to kill some fds and retry */
1018static void noinline 1662static void noinline ecb_cold
1019fd_enomem (EV_P) 1663fd_enomem (EV_P)
1020{ 1664{
1021 int fd; 1665 int fd;
1022 1666
1023 for (fd = anfdmax; fd--; ) 1667 for (fd = anfdmax; fd--; )
… …
1218 1862
1219/*****************************************************************************/ 1863/*****************************************************************************/
1220 1864
1221#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 1865#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1222 1866
1223static void noinline 1867static void noinline ecb_cold
1224evpipe_init (EV_P) 1868evpipe_init (EV_P)
1225{ 1869{
1226 if (!ev_is_active (&pipe_w)) 1870 if (!ev_is_active (&pipe_w))
1227 { 1871 {
1872 int fds [2];
1873
1228# if EV_USE_EVENTFD 1874# if EV_USE_EVENTFD
1875 fds [0] = -1;
1229 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 1876 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1230 if (evfd < 0 && errno == EINVAL) 1877 if (fds [1] < 0 && errno == EINVAL)
1231 evfd = eventfd (0, 0); 1878 fds [1] = eventfd (0, 0);
1232 1879
1233 if (evfd >= 0) 1880 if (fds [1] < 0)
1881# endif
1234 { 1882 {
1883 while (pipe (fds))
1884 ev_syserr ("(libev) error creating signal/async pipe");
1885
1886 fd_intern (fds [0]);
1887 }
1888
1889 fd_intern (fds [1]);
1890
1235 evpipe [0] = -1; 1891 evpipe [0] = fds [0];
1236 fd_intern (evfd); /* doing it twice doesn't hurt */ 1892
1237 ev_io_set (&pipe_w, evfd, EV_READ); 1893 if (evpipe [1] < 0)
1894 evpipe [1] = fds [1]; /* first call, set write fd */
1895 else
1896 {
1897 /* on subsequent calls, do not change evpipe [1] */
1898 /* so that evpipe_write can always rely on its value. */
1899 /* this branch does not do anything sensible on windows, */
1900 /* so must not be executed on windows */
1901
1902 dup2 (fds [1], evpipe [1]);
1903 close (fds [1]);
1904 }
1905
1906 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
1907 ev_io_start (EV_A_ &pipe_w);
1908 ev_unref (EV_A); /* watcher should not keep loop alive */
1909 }
1910}
1911
1912inline_speed void
1913evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1914{
1915 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1916
1917 if (expect_true (*flag))
1918 return;
1919
1920 *flag = 1;
1921 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1922
1923 pipe_write_skipped = 1;
1924
1925 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1926
1927 if (pipe_write_wanted)
1928 {
1929 int old_errno;
1930
1931 pipe_write_skipped = 0;
1932 ECB_MEMORY_FENCE_RELEASE;
1933
1934 old_errno = errno; /* save errno because write will clobber it */
1935
1936#if EV_USE_EVENTFD
1937 if (evpipe [0] < 0)
1938 {
1939 uint64_t counter = 1;
1940 write (evpipe [1], &counter, sizeof (uint64_t));
1238 } 1941 }
1239 else 1942 else
1240# endif 1943#endif
1241 { 1944 {
1242 while (pipe (evpipe)) 1945#ifdef _WIN32
1243 ev_syserr ("(libev) error creating signal/async pipe"); 1946 WSABUF buf;
1244 1947 DWORD sent;
1245 fd_intern (evpipe [0]); 1948 buf.buf = &buf;
1246 fd_intern (evpipe [1]); 1949 buf.len = 1;
1247 ev_io_set (&pipe_w, evpipe [0], EV_READ); 1950 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
1951#else
1952 write (evpipe [1], &(evpipe [1]), 1);
1953#endif
1248 } 1954 }
1249
1250 ev_io_start (EV_A_ &pipe_w);
1251 ev_unref (EV_A); /* watcher should not keep loop alive */
1252 }
1253}
1254
1255inline_size void
1256evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1257{
1258 if (!*flag)
1259 {
1260 int old_errno = errno; /* save errno because write might clobber it */
1261 char dummy;
1262
1263 *flag = 1;
1264
1265#if EV_USE_EVENTFD
1266 if (evfd >= 0)
1267 {
1268 uint64_t counter = 1;
1269 write (evfd, &counter, sizeof (uint64_t));
1270 }
1271 else
1272#endif
1273 /* win32 people keep sending patches that change this write() to send() */
1274 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1275 /* so when you think this write should be a send instead, please find out */
1276 /* where your send() is from - it's definitely not the microsoft send, and */
1277 /* tell me. thank you. */
1278 write (evpipe [1], &dummy, 1);
1279 1955
1280 errno = old_errno; 1956 errno = old_errno;
1281 } 1957 }
1282} 1958}
1283 1959
… …
1286static void 1962static void
1287pipecb (EV_P_ ev_io *iow, int revents) 1963pipecb (EV_P_ ev_io *iow, int revents)
1288{ 1964{
1289 int i; 1965 int i;
1290 1966
1967 if (revents & EV_READ)
1968 {
1291#if EV_USE_EVENTFD 1969#if EV_USE_EVENTFD
1292 if (evfd >= 0) 1970 if (evpipe [0] < 0)
1293 { 1971 {
1294 uint64_t counter; 1972 uint64_t counter;
1295 read (evfd, &counter, sizeof (uint64_t)); 1973 read (evpipe [1], &counter, sizeof (uint64_t));
1296 } 1974 }
1297 else 1975 else
1298#endif 1976#endif
1299 { 1977 {
1300 char dummy; 1978 char dummy[4];
1301 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 1979#ifdef _WIN32
1980 WSABUF buf;
1981 DWORD recvd;
1982 DWORD flags = 0;
1983 buf.buf = dummy;
1984 buf.len = sizeof (dummy);
1985 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
1986#else
1302 read (evpipe [0], &dummy, 1); 1987 read (evpipe [0], &dummy, sizeof (dummy));
1988#endif
1989 }
1303 } 1990 }
1304 1991
1992 pipe_write_skipped = 0;
1993
1994 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1995
1996#if EV_SIGNAL_ENABLE
1305 if (sig_pending) 1997 if (sig_pending)
1306 { 1998 {
1307 sig_pending = 0; 1999 sig_pending = 0;
2000
2001 ECB_MEMORY_FENCE;
1308 2002
1309 for (i = EV_NSIG - 1; i--; ) 2003 for (i = EV_NSIG - 1; i--; )
1310 if (expect_false (signals [i].pending)) 2004 if (expect_false (signals [i].pending))
1311 ev_feed_signal_event (EV_A_ i + 1); 2005 ev_feed_signal_event (EV_A_ i + 1);
1312 } 2006 }
2007#endif
1313 2008
1314#if EV_ASYNC_ENABLE 2009#if EV_ASYNC_ENABLE
1315 if (async_pending) 2010 if (async_pending)
1316 { 2011 {
1317 async_pending = 0; 2012 async_pending = 0;
2013
2014 ECB_MEMORY_FENCE;
1318 2015
1319 for (i = asynccnt; i--; ) 2016 for (i = asynccnt; i--; )
1320 if (asyncs [i]->sent) 2017 if (asyncs [i]->sent)
1321 { 2018 {
1322 asyncs [i]->sent = 0; 2019 asyncs [i]->sent = 0;
2020 ECB_MEMORY_FENCE_RELEASE;
1323 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2021 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1324 } 2022 }
1325 } 2023 }
1326#endif 2024#endif
1327} 2025}
1328 2026
1329/*****************************************************************************/ 2027/*****************************************************************************/
1330 2028
2029void
2030ev_feed_signal (int signum) EV_THROW
2031{
2032#if EV_MULTIPLICITY
2033 ECB_MEMORY_FENCE_ACQUIRE;
2034 EV_P = signals [signum - 1].loop;
2035
2036 if (!EV_A)
2037 return;
2038#endif
2039
2040 signals [signum - 1].pending = 1;
2041 evpipe_write (EV_A_ &sig_pending);
2042}
2043
1331static void 2044static void
1332ev_sighandler (int signum) 2045ev_sighandler (int signum)
1333{ 2046{
1334#if EV_MULTIPLICITY
1335 EV_P = signals [signum - 1].loop;
1336#endif
1337
1338#ifdef _WIN32 2047#ifdef _WIN32
1339 signal (signum, ev_sighandler); 2048 signal (signum, ev_sighandler);
1340#endif 2049#endif
1341 2050
1342 signals [signum - 1].pending = 1; 2051 ev_feed_signal (signum);
1343 evpipe_write (EV_A_ &sig_pending);
1344} 2052}
1345 2053
1346void noinline 2054void noinline
1347ev_feed_signal_event (EV_P_ int signum) 2055ev_feed_signal_event (EV_P_ int signum) EV_THROW
1348{ 2056{
1349 WL w; 2057 WL w;
1350 2058
1351 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2059 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1352 return; 2060 return;
1353 2061
1354 --signum; 2062 --signum;
1355 2063
1356#if EV_MULTIPLICITY 2064#if EV_MULTIPLICITY
… …
1360 if (expect_false (signals [signum].loop != EV_A)) 2068 if (expect_false (signals [signum].loop != EV_A))
1361 return; 2069 return;
1362#endif 2070#endif
1363 2071
1364 signals [signum].pending = 0; 2072 signals [signum].pending = 0;
2073 ECB_MEMORY_FENCE_RELEASE;
1365 2074
1366 for (w = signals [signum].head; w; w = w->next) 2075 for (w = signals [signum].head; w; w = w->next)
1367 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2076 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1368} 2077}
1369 2078
… …
1448 2157
1449#endif 2158#endif
1450 2159
1451/*****************************************************************************/ 2160/*****************************************************************************/
1452 2161
2162#if EV_USE_IOCP
2163# include "ev_iocp.c"
2164#endif
1453#if EV_USE_PORT 2165#if EV_USE_PORT
1454# include "ev_port.c" 2166# include "ev_port.c"
1455#endif 2167#endif
1456#if EV_USE_KQUEUE 2168#if EV_USE_KQUEUE
1457# include "ev_kqueue.c" 2169# include "ev_kqueue.c"
… …
1464#endif 2176#endif
1465#if EV_USE_SELECT 2177#if EV_USE_SELECT
1466# include "ev_select.c" 2178# include "ev_select.c"
1467#endif 2179#endif
1468 2180
1469int 2181int ecb_cold
1470ev_version_major (void) 2182ev_version_major (void) EV_THROW
1471{ 2183{
1472 return EV_VERSION_MAJOR; 2184 return EV_VERSION_MAJOR;
1473} 2185}
1474 2186
1475int 2187int ecb_cold
1476ev_version_minor (void) 2188ev_version_minor (void) EV_THROW
1477{ 2189{
1478 return EV_VERSION_MINOR; 2190 return EV_VERSION_MINOR;
1479} 2191}
1480 2192
1481/* return true if we are running with elevated privileges and should ignore env variables */ 2193/* return true if we are running with elevated privileges and should ignore env variables */
1482int inline_size 2194int inline_size ecb_cold
1483enable_secure (void) 2195enable_secure (void)
1484{ 2196{
1485#ifdef _WIN32 2197#ifdef _WIN32
1486 return 0; 2198 return 0;
1487#else 2199#else
1488 return getuid () != geteuid () 2200 return getuid () != geteuid ()
1489 || getgid () != getegid (); 2201 || getgid () != getegid ();
1490#endif 2202#endif
1491} 2203}
1492 2204
1493unsigned int 2205unsigned int ecb_cold
1494ev_supported_backends (void) 2206ev_supported_backends (void) EV_THROW
1495{ 2207{
1496 unsigned int flags = 0; 2208 unsigned int flags = 0;
1497 2209
1498 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2210 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1499 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2211 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1502 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2214 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1503 2215
1504 return flags; 2216 return flags;
1505} 2217}
1506 2218
1507unsigned int 2219unsigned int ecb_cold
1508ev_recommended_backends (void) 2220ev_recommended_backends (void) EV_THROW
1509{ 2221{
1510 unsigned int flags = ev_supported_backends (); 2222 unsigned int flags = ev_supported_backends ();
1511 2223
1512#ifndef __NetBSD__ 2224#ifndef __NetBSD__
1513 /* kqueue is borked on everything but netbsd apparently */ 2225 /* kqueue is borked on everything but netbsd apparently */
… …
1524#endif 2236#endif
1525 2237
1526 return flags; 2238 return flags;
1527} 2239}
1528 2240
2241unsigned int ecb_cold
2242ev_embeddable_backends (void) EV_THROW
2243{
2244 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2245
2246 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2247 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2248 flags &= ~EVBACKEND_EPOLL;
2249
2250 return flags;
2251}
2252
1529unsigned int 2253unsigned int
1530ev_embeddable_backends (void)
1531{
1532 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1533
1534 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1535 /* please fix it and tell me how to detect the fix */
1536 flags &= ~EVBACKEND_EPOLL;
1537
1538 return flags;
1539}
1540
1541unsigned int
1542ev_backend (EV_P) 2254ev_backend (EV_P) EV_THROW
1543{ 2255{
1544 return backend; 2256 return backend;
1545} 2257}
1546 2258
1547#if EV_FEATURE_API 2259#if EV_FEATURE_API
1548unsigned int 2260unsigned int
1549ev_iteration (EV_P) 2261ev_iteration (EV_P) EV_THROW
1550{ 2262{
1551 return loop_count; 2263 return loop_count;
1552} 2264}
1553 2265
1554unsigned int 2266unsigned int
1555ev_depth (EV_P) 2267ev_depth (EV_P) EV_THROW
1556{ 2268{
1557 return loop_depth; 2269 return loop_depth;
1558} 2270}
1559 2271
1560void 2272void
1561ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2273ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1562{ 2274{
1563 io_blocktime = interval; 2275 io_blocktime = interval;
1564} 2276}
1565 2277
1566void 2278void
1567ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2279ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1568{ 2280{
1569 timeout_blocktime = interval; 2281 timeout_blocktime = interval;
1570} 2282}
1571 2283
1572void 2284void
1573ev_set_userdata (EV_P_ void *data) 2285ev_set_userdata (EV_P_ void *data) EV_THROW
1574{ 2286{
1575 userdata = data; 2287 userdata = data;
1576} 2288}
1577 2289
1578void * 2290void *
1579ev_userdata (EV_P) 2291ev_userdata (EV_P) EV_THROW
1580{ 2292{
1581 return userdata; 2293 return userdata;
1582} 2294}
1583 2295
2296void
1584void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2297ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
1585{ 2298{
1586 invoke_cb = invoke_pending_cb; 2299 invoke_cb = invoke_pending_cb;
1587} 2300}
1588 2301
2302void
1589void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2303ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
1590{ 2304{
1591 release_cb = release; 2305 release_cb = release;
1592 acquire_cb = acquire; 2306 acquire_cb = acquire;
1593} 2307}
1594#endif 2308#endif
1595 2309
1596/* initialise a loop structure, must be zero-initialised */ 2310/* initialise a loop structure, must be zero-initialised */
1597static void noinline 2311static void noinline ecb_cold
1598loop_init (EV_P_ unsigned int flags) 2312loop_init (EV_P_ unsigned int flags) EV_THROW
1599{ 2313{
1600 if (!backend) 2314 if (!backend)
1601 { 2315 {
2316 origflags = flags;
2317
1602#if EV_USE_REALTIME 2318#if EV_USE_REALTIME
1603 if (!have_realtime) 2319 if (!have_realtime)
1604 { 2320 {
1605 struct timespec ts; 2321 struct timespec ts;
1606 2322
… …
1628 if (!(flags & EVFLAG_NOENV) 2344 if (!(flags & EVFLAG_NOENV)
1629 && !enable_secure () 2345 && !enable_secure ()
1630 && getenv ("LIBEV_FLAGS")) 2346 && getenv ("LIBEV_FLAGS"))
1631 flags = atoi (getenv ("LIBEV_FLAGS")); 2347 flags = atoi (getenv ("LIBEV_FLAGS"));
1632 2348
1633 ev_rt_now = ev_time (); 2349 ev_rt_now = ev_time ();
1634 mn_now = get_clock (); 2350 mn_now = get_clock ();
1635 now_floor = mn_now; 2351 now_floor = mn_now;
1636 rtmn_diff = ev_rt_now - mn_now; 2352 rtmn_diff = ev_rt_now - mn_now;
1637#if EV_FEATURE_API 2353#if EV_FEATURE_API
1638 invoke_cb = ev_invoke_pending; 2354 invoke_cb = ev_invoke_pending;
1639#endif 2355#endif
1640 2356
1641 io_blocktime = 0.; 2357 io_blocktime = 0.;
1642 timeout_blocktime = 0.; 2358 timeout_blocktime = 0.;
1643 backend = 0; 2359 backend = 0;
1644 backend_fd = -1; 2360 backend_fd = -1;
1645 sig_pending = 0; 2361 sig_pending = 0;
1646#if EV_ASYNC_ENABLE 2362#if EV_ASYNC_ENABLE
1647 async_pending = 0; 2363 async_pending = 0;
1648#endif 2364#endif
2365 pipe_write_skipped = 0;
2366 pipe_write_wanted = 0;
2367 evpipe [0] = -1;
2368 evpipe [1] = -1;
1649#if EV_USE_INOTIFY 2369#if EV_USE_INOTIFY
1650 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2370 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1651#endif 2371#endif
1652#if EV_USE_SIGNALFD 2372#if EV_USE_SIGNALFD
1653 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2373 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1654#endif 2374#endif
1655 2375
1656 if (!(flags & 0x0000ffffU)) 2376 if (!(flags & EVBACKEND_MASK))
1657 flags |= ev_recommended_backends (); 2377 flags |= ev_recommended_backends ();
1658 2378
2379#if EV_USE_IOCP
2380 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2381#endif
1659#if EV_USE_PORT 2382#if EV_USE_PORT
1660 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2383 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1661#endif 2384#endif
1662#if EV_USE_KQUEUE 2385#if EV_USE_KQUEUE
1663 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2386 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1680#endif 2403#endif
1681 } 2404 }
1682} 2405}
1683 2406
1684/* free up a loop structure */ 2407/* free up a loop structure */
1685static void noinline 2408void ecb_cold
1686loop_destroy (EV_P) 2409ev_loop_destroy (EV_P)
1687{ 2410{
1688 int i; 2411 int i;
2412
2413#if EV_MULTIPLICITY
2414 /* mimic free (0) */
2415 if (!EV_A)
2416 return;
2417#endif
2418
2419#if EV_CLEANUP_ENABLE
2420 /* queue cleanup watchers (and execute them) */
2421 if (expect_false (cleanupcnt))
2422 {
2423 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2424 EV_INVOKE_PENDING;
2425 }
2426#endif
2427
2428#if EV_CHILD_ENABLE
2429 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2430 {
2431 ev_ref (EV_A); /* child watcher */
2432 ev_signal_stop (EV_A_ &childev);
2433 }
2434#endif
1689 2435
1690 if (ev_is_active (&pipe_w)) 2436 if (ev_is_active (&pipe_w))
1691 { 2437 {
1692 /*ev_ref (EV_A);*/ 2438 /*ev_ref (EV_A);*/
1693 /*ev_io_stop (EV_A_ &pipe_w);*/ 2439 /*ev_io_stop (EV_A_ &pipe_w);*/
1694 2440
1695#if EV_USE_EVENTFD
1696 if (evfd >= 0)
1697 close (evfd);
1698#endif
1699
1700 if (evpipe [0] >= 0)
1701 {
1702 EV_WIN32_CLOSE_FD (evpipe [0]); 2441 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1703 EV_WIN32_CLOSE_FD (evpipe [1]); 2442 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1704 }
1705 } 2443 }
1706 2444
1707#if EV_USE_SIGNALFD 2445#if EV_USE_SIGNALFD
1708 if (ev_is_active (&sigfd_w)) 2446 if (ev_is_active (&sigfd_w))
1709 close (sigfd); 2447 close (sigfd);
… …
1715#endif 2453#endif
1716 2454
1717 if (backend_fd >= 0) 2455 if (backend_fd >= 0)
1718 close (backend_fd); 2456 close (backend_fd);
1719 2457
2458#if EV_USE_IOCP
2459 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2460#endif
1720#if EV_USE_PORT 2461#if EV_USE_PORT
1721 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2462 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1722#endif 2463#endif
1723#if EV_USE_KQUEUE 2464#if EV_USE_KQUEUE
1724 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2465 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1751 array_free (periodic, EMPTY); 2492 array_free (periodic, EMPTY);
1752#endif 2493#endif
1753#if EV_FORK_ENABLE 2494#if EV_FORK_ENABLE
1754 array_free (fork, EMPTY); 2495 array_free (fork, EMPTY);
1755#endif 2496#endif
2497#if EV_CLEANUP_ENABLE
2498 array_free (cleanup, EMPTY);
2499#endif
1756 array_free (prepare, EMPTY); 2500 array_free (prepare, EMPTY);
1757 array_free (check, EMPTY); 2501 array_free (check, EMPTY);
1758#if EV_ASYNC_ENABLE 2502#if EV_ASYNC_ENABLE
1759 array_free (async, EMPTY); 2503 array_free (async, EMPTY);
1760#endif 2504#endif
1761 2505
1762 backend = 0; 2506 backend = 0;
2507
2508#if EV_MULTIPLICITY
2509 if (ev_is_default_loop (EV_A))
2510#endif
2511 ev_default_loop_ptr = 0;
2512#if EV_MULTIPLICITY
2513 else
2514 ev_free (EV_A);
2515#endif
1763} 2516}
1764 2517
1765#if EV_USE_INOTIFY 2518#if EV_USE_INOTIFY
1766inline_size void infy_fork (EV_P); 2519inline_size void infy_fork (EV_P);
1767#endif 2520#endif
… …
1780#endif 2533#endif
1781#if EV_USE_INOTIFY 2534#if EV_USE_INOTIFY
1782 infy_fork (EV_A); 2535 infy_fork (EV_A);
1783#endif 2536#endif
1784 2537
2538#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1785 if (ev_is_active (&pipe_w)) 2539 if (ev_is_active (&pipe_w))
1786 { 2540 {
1787 /* this "locks" the handlers against writing to the pipe */ 2541 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1788 /* while we modify the fd vars */
1789 sig_pending = 1;
1790#if EV_ASYNC_ENABLE
1791 async_pending = 1;
1792#endif
1793 2542
1794 ev_ref (EV_A); 2543 ev_ref (EV_A);
1795 ev_io_stop (EV_A_ &pipe_w); 2544 ev_io_stop (EV_A_ &pipe_w);
1796 2545
1797#if EV_USE_EVENTFD
1798 if (evfd >= 0)
1799 close (evfd);
1800#endif
1801
1802 if (evpipe [0] >= 0) 2546 if (evpipe [0] >= 0)
1803 {
1804 EV_WIN32_CLOSE_FD (evpipe [0]); 2547 EV_WIN32_CLOSE_FD (evpipe [0]);
1805 EV_WIN32_CLOSE_FD (evpipe [1]);
1806 }
1807 2548
1808#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1809 evpipe_init (EV_A); 2549 evpipe_init (EV_A);
1810 /* now iterate over everything, in case we missed something */ 2550 /* iterate over everything, in case we missed something before */
1811 pipecb (EV_A_ &pipe_w, EV_READ); 2551 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1812#endif
1813 } 2552 }
2553#endif
1814 2554
1815 postfork = 0; 2555 postfork = 0;
1816} 2556}
1817 2557
1818#if EV_MULTIPLICITY 2558#if EV_MULTIPLICITY
1819 2559
1820struct ev_loop * 2560struct ev_loop * ecb_cold
1821ev_loop_new (unsigned int flags) 2561ev_loop_new (unsigned int flags) EV_THROW
1822{ 2562{
1823 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2563 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1824 2564
1825 memset (EV_A, 0, sizeof (struct ev_loop)); 2565 memset (EV_A, 0, sizeof (struct ev_loop));
1826 loop_init (EV_A_ flags); 2566 loop_init (EV_A_ flags);
1827 2567
1828 if (ev_backend (EV_A)) 2568 if (ev_backend (EV_A))
1829 return EV_A; 2569 return EV_A;
1830 2570
2571 ev_free (EV_A);
1831 return 0; 2572 return 0;
1832} 2573}
1833 2574
1834void
1835ev_loop_destroy (EV_P)
1836{
1837 loop_destroy (EV_A);
1838 ev_free (loop);
1839}
1840
1841void
1842ev_loop_fork (EV_P)
1843{
1844 postfork = 1; /* must be in line with ev_default_fork */
1845}
1846#endif /* multiplicity */ 2575#endif /* multiplicity */
1847 2576
1848#if EV_VERIFY 2577#if EV_VERIFY
1849static void noinline 2578static void noinline ecb_cold
1850verify_watcher (EV_P_ W w) 2579verify_watcher (EV_P_ W w)
1851{ 2580{
1852 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2581 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1853 2582
1854 if (w->pending) 2583 if (w->pending)
1855 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2584 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1856} 2585}
1857 2586
1858static void noinline 2587static void noinline ecb_cold
1859verify_heap (EV_P_ ANHE *heap, int N) 2588verify_heap (EV_P_ ANHE *heap, int N)
1860{ 2589{
1861 int i; 2590 int i;
1862 2591
1863 for (i = HEAP0; i < N + HEAP0; ++i) 2592 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1868 2597
1869 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2598 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1870 } 2599 }
1871} 2600}
1872 2601
1873static void noinline 2602static void noinline ecb_cold
1874array_verify (EV_P_ W *ws, int cnt) 2603array_verify (EV_P_ W *ws, int cnt)
1875{ 2604{
1876 while (cnt--) 2605 while (cnt--)
1877 { 2606 {
1878 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2607 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1880 } 2609 }
1881} 2610}
1882#endif 2611#endif
1883 2612
1884#if EV_FEATURE_API 2613#if EV_FEATURE_API
1885void 2614void ecb_cold
1886ev_verify (EV_P) 2615ev_verify (EV_P) EV_THROW
1887{ 2616{
1888#if EV_VERIFY 2617#if EV_VERIFY
1889 int i; 2618 int i;
1890 WL w; 2619 WL w, w2;
1891 2620
1892 assert (activecnt >= -1); 2621 assert (activecnt >= -1);
1893 2622
1894 assert (fdchangemax >= fdchangecnt); 2623 assert (fdchangemax >= fdchangecnt);
1895 for (i = 0; i < fdchangecnt; ++i) 2624 for (i = 0; i < fdchangecnt; ++i)
1896 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 2625 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1897 2626
1898 assert (anfdmax >= 0); 2627 assert (anfdmax >= 0);
1899 for (i = 0; i < anfdmax; ++i) 2628 for (i = 0; i < anfdmax; ++i)
2629 {
2630 int j = 0;
2631
1900 for (w = anfds [i].head; w; w = w->next) 2632 for (w = w2 = anfds [i].head; w; w = w->next)
1901 { 2633 {
1902 verify_watcher (EV_A_ (W)w); 2634 verify_watcher (EV_A_ (W)w);
2635
2636 if (j++ & 1)
2637 {
2638 assert (("libev: io watcher list contains a loop", w != w2));
2639 w2 = w2->next;
2640 }
2641
1903 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 2642 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1904 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 2643 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1905 } 2644 }
2645 }
1906 2646
1907 assert (timermax >= timercnt); 2647 assert (timermax >= timercnt);
1908 verify_heap (EV_A_ timers, timercnt); 2648 verify_heap (EV_A_ timers, timercnt);
1909 2649
1910#if EV_PERIODIC_ENABLE 2650#if EV_PERIODIC_ENABLE
… …
1925#if EV_FORK_ENABLE 2665#if EV_FORK_ENABLE
1926 assert (forkmax >= forkcnt); 2666 assert (forkmax >= forkcnt);
1927 array_verify (EV_A_ (W *)forks, forkcnt); 2667 array_verify (EV_A_ (W *)forks, forkcnt);
1928#endif 2668#endif
1929 2669
2670#if EV_CLEANUP_ENABLE
2671 assert (cleanupmax >= cleanupcnt);
2672 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2673#endif
2674
1930#if EV_ASYNC_ENABLE 2675#if EV_ASYNC_ENABLE
1931 assert (asyncmax >= asynccnt); 2676 assert (asyncmax >= asynccnt);
1932 array_verify (EV_A_ (W *)asyncs, asynccnt); 2677 array_verify (EV_A_ (W *)asyncs, asynccnt);
1933#endif 2678#endif
1934 2679
… …
1951#endif 2696#endif
1952} 2697}
1953#endif 2698#endif
1954 2699
1955#if EV_MULTIPLICITY 2700#if EV_MULTIPLICITY
1956struct ev_loop * 2701struct ev_loop * ecb_cold
1957ev_default_loop_init (unsigned int flags)
1958#else 2702#else
1959int 2703int
2704#endif
1960ev_default_loop (unsigned int flags) 2705ev_default_loop (unsigned int flags) EV_THROW
1961#endif
1962{ 2706{
1963 if (!ev_default_loop_ptr) 2707 if (!ev_default_loop_ptr)
1964 { 2708 {
1965#if EV_MULTIPLICITY 2709#if EV_MULTIPLICITY
1966 EV_P = ev_default_loop_ptr = &default_loop_struct; 2710 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1985 2729
1986 return ev_default_loop_ptr; 2730 return ev_default_loop_ptr;
1987} 2731}
1988 2732
1989void 2733void
1990ev_default_destroy (void) 2734ev_loop_fork (EV_P) EV_THROW
1991{ 2735{
1992#if EV_MULTIPLICITY 2736 postfork = 1;
1993 EV_P = ev_default_loop_ptr;
1994#endif
1995
1996 ev_default_loop_ptr = 0;
1997
1998#if EV_CHILD_ENABLE
1999 ev_ref (EV_A); /* child watcher */
2000 ev_signal_stop (EV_A_ &childev);
2001#endif
2002
2003 loop_destroy (EV_A);
2004}
2005
2006void
2007ev_default_fork (void)
2008{
2009#if EV_MULTIPLICITY
2010 EV_P = ev_default_loop_ptr;
2011#endif
2012
2013 postfork = 1; /* must be in line with ev_loop_fork */
2014} 2737}
2015 2738
2016/*****************************************************************************/ 2739/*****************************************************************************/
2017 2740
2018void 2741void
… …
2020{ 2743{
2021 EV_CB_INVOKE ((W)w, revents); 2744 EV_CB_INVOKE ((W)w, revents);
2022} 2745}
2023 2746
2024unsigned int 2747unsigned int
2025ev_pending_count (EV_P) 2748ev_pending_count (EV_P) EV_THROW
2026{ 2749{
2027 int pri; 2750 int pri;
2028 unsigned int count = 0; 2751 unsigned int count = 0;
2029 2752
2030 for (pri = NUMPRI; pri--; ) 2753 for (pri = NUMPRI; pri--; )
… …
2034} 2757}
2035 2758
2036void noinline 2759void noinline
2037ev_invoke_pending (EV_P) 2760ev_invoke_pending (EV_P)
2038{ 2761{
2039 int pri; 2762 pendingpri = NUMPRI;
2040 2763
2041 for (pri = NUMPRI; pri--; ) 2764 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
2765 {
2766 --pendingpri;
2767
2042 while (pendingcnt [pri]) 2768 while (pendingcnt [pendingpri])
2043 { 2769 {
2044 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2770 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2045 2771
2046 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2047 /* ^ this is no longer true, as pending_w could be here */
2048
2049 p->w->pending = 0; 2772 p->w->pending = 0;
2050 EV_CB_INVOKE (p->w, p->events); 2773 EV_CB_INVOKE (p->w, p->events);
2051 EV_FREQUENT_CHECK; 2774 EV_FREQUENT_CHECK;
2052 } 2775 }
2776 }
2053} 2777}
2054 2778
2055#if EV_IDLE_ENABLE 2779#if EV_IDLE_ENABLE
2056/* make idle watchers pending. this handles the "call-idle */ 2780/* make idle watchers pending. this handles the "call-idle */
2057/* only when higher priorities are idle" logic */ 2781/* only when higher priorities are idle" logic */
… …
2114 feed_reverse_done (EV_A_ EV_TIMER); 2838 feed_reverse_done (EV_A_ EV_TIMER);
2115 } 2839 }
2116} 2840}
2117 2841
2118#if EV_PERIODIC_ENABLE 2842#if EV_PERIODIC_ENABLE
2843
2844static void noinline
2845periodic_recalc (EV_P_ ev_periodic *w)
2846{
2847 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2848 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2849
2850 /* the above almost always errs on the low side */
2851 while (at <= ev_rt_now)
2852 {
2853 ev_tstamp nat = at + w->interval;
2854
2855 /* when resolution fails us, we use ev_rt_now */
2856 if (expect_false (nat == at))
2857 {
2858 at = ev_rt_now;
2859 break;
2860 }
2861
2862 at = nat;
2863 }
2864
2865 ev_at (w) = at;
2866}
2867
2119/* make periodics pending */ 2868/* make periodics pending */
2120inline_size void 2869inline_size void
2121periodics_reify (EV_P) 2870periodics_reify (EV_P)
2122{ 2871{
2123 EV_FREQUENT_CHECK; 2872 EV_FREQUENT_CHECK;
2124 2873
2125 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 2874 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2126 { 2875 {
2127 int feed_count = 0;
2128
2129 do 2876 do
2130 { 2877 {
2131 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 2878 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2132 2879
2133 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 2880 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2142 ANHE_at_cache (periodics [HEAP0]); 2889 ANHE_at_cache (periodics [HEAP0]);
2143 downheap (periodics, periodiccnt, HEAP0); 2890 downheap (periodics, periodiccnt, HEAP0);
2144 } 2891 }
2145 else if (w->interval) 2892 else if (w->interval)
2146 { 2893 {
2147 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2894 periodic_recalc (EV_A_ w);
2148 /* if next trigger time is not sufficiently in the future, put it there */
2149 /* this might happen because of floating point inexactness */
2150 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2151 {
2152 ev_at (w) += w->interval;
2153
2154 /* if interval is unreasonably low we might still have a time in the past */
2155 /* so correct this. this will make the periodic very inexact, but the user */
2156 /* has effectively asked to get triggered more often than possible */
2157 if (ev_at (w) < ev_rt_now)
2158 ev_at (w) = ev_rt_now;
2159 }
2160
2161 ANHE_at_cache (periodics [HEAP0]); 2895 ANHE_at_cache (periodics [HEAP0]);
2162 downheap (periodics, periodiccnt, HEAP0); 2896 downheap (periodics, periodiccnt, HEAP0);
2163 } 2897 }
2164 else 2898 else
2165 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 2899 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2173 } 2907 }
2174} 2908}
2175 2909
2176/* simply recalculate all periodics */ 2910/* simply recalculate all periodics */
2177/* TODO: maybe ensure that at least one event happens when jumping forward? */ 2911/* TODO: maybe ensure that at least one event happens when jumping forward? */
2178static void noinline 2912static void noinline ecb_cold
2179periodics_reschedule (EV_P) 2913periodics_reschedule (EV_P)
2180{ 2914{
2181 int i; 2915 int i;
2182 2916
2183 /* adjust periodics after time jump */ 2917 /* adjust periodics after time jump */
… …
2186 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 2920 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2187 2921
2188 if (w->reschedule_cb) 2922 if (w->reschedule_cb)
2189 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2923 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2190 else if (w->interval) 2924 else if (w->interval)
2191 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2925 periodic_recalc (EV_A_ w);
2192 2926
2193 ANHE_at_cache (periodics [i]); 2927 ANHE_at_cache (periodics [i]);
2194 } 2928 }
2195 2929
2196 reheap (periodics, periodiccnt); 2930 reheap (periodics, periodiccnt);
2197} 2931}
2198#endif 2932#endif
2199 2933
2200/* adjust all timers by a given offset */ 2934/* adjust all timers by a given offset */
2201static void noinline 2935static void noinline ecb_cold
2202timers_reschedule (EV_P_ ev_tstamp adjust) 2936timers_reschedule (EV_P_ ev_tstamp adjust)
2203{ 2937{
2204 int i; 2938 int i;
2205 2939
2206 for (i = 0; i < timercnt; ++i) 2940 for (i = 0; i < timercnt; ++i)
… …
2243 * doesn't hurt either as we only do this on time-jumps or 2977 * doesn't hurt either as we only do this on time-jumps or
2244 * in the unlikely event of having been preempted here. 2978 * in the unlikely event of having been preempted here.
2245 */ 2979 */
2246 for (i = 4; --i; ) 2980 for (i = 4; --i; )
2247 { 2981 {
2982 ev_tstamp diff;
2248 rtmn_diff = ev_rt_now - mn_now; 2983 rtmn_diff = ev_rt_now - mn_now;
2249 2984
2985 diff = odiff - rtmn_diff;
2986
2250 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 2987 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2251 return; /* all is well */ 2988 return; /* all is well */
2252 2989
2253 ev_rt_now = ev_time (); 2990 ev_rt_now = ev_time ();
2254 mn_now = get_clock (); 2991 mn_now = get_clock ();
2255 now_floor = mn_now; 2992 now_floor = mn_now;
… …
2277 3014
2278 mn_now = ev_rt_now; 3015 mn_now = ev_rt_now;
2279 } 3016 }
2280} 3017}
2281 3018
2282void 3019int
2283ev_run (EV_P_ int flags) 3020ev_run (EV_P_ int flags)
2284{ 3021{
2285#if EV_FEATURE_API 3022#if EV_FEATURE_API
2286 ++loop_depth; 3023 ++loop_depth;
2287#endif 3024#endif
… …
2345 ev_tstamp prev_mn_now = mn_now; 3082 ev_tstamp prev_mn_now = mn_now;
2346 3083
2347 /* update time to cancel out callback processing overhead */ 3084 /* update time to cancel out callback processing overhead */
2348 time_update (EV_A_ 1e100); 3085 time_update (EV_A_ 1e100);
2349 3086
3087 /* from now on, we want a pipe-wake-up */
3088 pipe_write_wanted = 1;
3089
3090 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3091
2350 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3092 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2351 { 3093 {
2352 waittime = MAX_BLOCKTIME; 3094 waittime = MAX_BLOCKTIME;
2353 3095
2354 if (timercnt) 3096 if (timercnt)
2355 { 3097 {
2356 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3098 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2357 if (waittime > to) waittime = to; 3099 if (waittime > to) waittime = to;
2358 } 3100 }
2359 3101
2360#if EV_PERIODIC_ENABLE 3102#if EV_PERIODIC_ENABLE
2361 if (periodiccnt) 3103 if (periodiccnt)
2362 { 3104 {
2363 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3105 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2364 if (waittime > to) waittime = to; 3106 if (waittime > to) waittime = to;
2365 } 3107 }
2366#endif 3108#endif
2367 3109
2368 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3110 /* don't let timeouts decrease the waittime below timeout_blocktime */
2369 if (expect_false (waittime < timeout_blocktime)) 3111 if (expect_false (waittime < timeout_blocktime))
2370 waittime = timeout_blocktime; 3112 waittime = timeout_blocktime;
3113
3114 /* at this point, we NEED to wait, so we have to ensure */
3115 /* to pass a minimum nonzero value to the backend */
3116 if (expect_false (waittime < backend_mintime))
3117 waittime = backend_mintime;
2371 3118
2372 /* extra check because io_blocktime is commonly 0 */ 3119 /* extra check because io_blocktime is commonly 0 */
2373 if (expect_false (io_blocktime)) 3120 if (expect_false (io_blocktime))
2374 { 3121 {
2375 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3122 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2376 3123
2377 if (sleeptime > waittime - backend_fudge) 3124 if (sleeptime > waittime - backend_mintime)
2378 sleeptime = waittime - backend_fudge; 3125 sleeptime = waittime - backend_mintime;
2379 3126
2380 if (expect_true (sleeptime > 0.)) 3127 if (expect_true (sleeptime > 0.))
2381 { 3128 {
2382 ev_sleep (sleeptime); 3129 ev_sleep (sleeptime);
2383 waittime -= sleeptime; 3130 waittime -= sleeptime;
… …
2390#endif 3137#endif
2391 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3138 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2392 backend_poll (EV_A_ waittime); 3139 backend_poll (EV_A_ waittime);
2393 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3140 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2394 3141
3142 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3143
3144 ECB_MEMORY_FENCE_ACQUIRE;
3145 if (pipe_write_skipped)
3146 {
3147 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3148 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3149 }
3150
3151
2395 /* update ev_rt_now, do magic */ 3152 /* update ev_rt_now, do magic */
2396 time_update (EV_A_ waittime + sleeptime); 3153 time_update (EV_A_ waittime + sleeptime);
2397 } 3154 }
2398 3155
2399 /* queue pending timers and reschedule them */ 3156 /* queue pending timers and reschedule them */
… …
2425 loop_done = EVBREAK_CANCEL; 3182 loop_done = EVBREAK_CANCEL;
2426 3183
2427#if EV_FEATURE_API 3184#if EV_FEATURE_API
2428 --loop_depth; 3185 --loop_depth;
2429#endif 3186#endif
3187
3188 return activecnt;
2430} 3189}
2431 3190
2432void 3191void
2433ev_break (EV_P_ int how) 3192ev_break (EV_P_ int how) EV_THROW
2434{ 3193{
2435 loop_done = how; 3194 loop_done = how;
2436} 3195}
2437 3196
2438void 3197void
2439ev_ref (EV_P) 3198ev_ref (EV_P) EV_THROW
2440{ 3199{
2441 ++activecnt; 3200 ++activecnt;
2442} 3201}
2443 3202
2444void 3203void
2445ev_unref (EV_P) 3204ev_unref (EV_P) EV_THROW
2446{ 3205{
2447 --activecnt; 3206 --activecnt;
2448} 3207}
2449 3208
2450void 3209void
2451ev_now_update (EV_P) 3210ev_now_update (EV_P) EV_THROW
2452{ 3211{
2453 time_update (EV_A_ 1e100); 3212 time_update (EV_A_ 1e100);
2454} 3213}
2455 3214
2456void 3215void
2457ev_suspend (EV_P) 3216ev_suspend (EV_P) EV_THROW
2458{ 3217{
2459 ev_now_update (EV_A); 3218 ev_now_update (EV_A);
2460} 3219}
2461 3220
2462void 3221void
2463ev_resume (EV_P) 3222ev_resume (EV_P) EV_THROW
2464{ 3223{
2465 ev_tstamp mn_prev = mn_now; 3224 ev_tstamp mn_prev = mn_now;
2466 3225
2467 ev_now_update (EV_A); 3226 ev_now_update (EV_A);
2468 timers_reschedule (EV_A_ mn_now - mn_prev); 3227 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2507 w->pending = 0; 3266 w->pending = 0;
2508 } 3267 }
2509} 3268}
2510 3269
2511int 3270int
2512ev_clear_pending (EV_P_ void *w) 3271ev_clear_pending (EV_P_ void *w) EV_THROW
2513{ 3272{
2514 W w_ = (W)w; 3273 W w_ = (W)w;
2515 int pending = w_->pending; 3274 int pending = w_->pending;
2516 3275
2517 if (expect_true (pending)) 3276 if (expect_true (pending))
… …
2550} 3309}
2551 3310
2552/*****************************************************************************/ 3311/*****************************************************************************/
2553 3312
2554void noinline 3313void noinline
2555ev_io_start (EV_P_ ev_io *w) 3314ev_io_start (EV_P_ ev_io *w) EV_THROW
2556{ 3315{
2557 int fd = w->fd; 3316 int fd = w->fd;
2558 3317
2559 if (expect_false (ev_is_active (w))) 3318 if (expect_false (ev_is_active (w)))
2560 return; 3319 return;
… …
2566 3325
2567 ev_start (EV_A_ (W)w, 1); 3326 ev_start (EV_A_ (W)w, 1);
2568 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3327 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2569 wlist_add (&anfds[fd].head, (WL)w); 3328 wlist_add (&anfds[fd].head, (WL)w);
2570 3329
3330 /* common bug, apparently */
3331 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3332
2571 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3333 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2572 w->events &= ~EV__IOFDSET; 3334 w->events &= ~EV__IOFDSET;
2573 3335
2574 EV_FREQUENT_CHECK; 3336 EV_FREQUENT_CHECK;
2575} 3337}
2576 3338
2577void noinline 3339void noinline
2578ev_io_stop (EV_P_ ev_io *w) 3340ev_io_stop (EV_P_ ev_io *w) EV_THROW
2579{ 3341{
2580 clear_pending (EV_A_ (W)w); 3342 clear_pending (EV_A_ (W)w);
2581 if (expect_false (!ev_is_active (w))) 3343 if (expect_false (!ev_is_active (w)))
2582 return; 3344 return;
2583 3345
… …
2592 3354
2593 EV_FREQUENT_CHECK; 3355 EV_FREQUENT_CHECK;
2594} 3356}
2595 3357
2596void noinline 3358void noinline
2597ev_timer_start (EV_P_ ev_timer *w) 3359ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2598{ 3360{
2599 if (expect_false (ev_is_active (w))) 3361 if (expect_false (ev_is_active (w)))
2600 return; 3362 return;
2601 3363
2602 ev_at (w) += mn_now; 3364 ev_at (w) += mn_now;
… …
2616 3378
2617 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3379 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2618} 3380}
2619 3381
2620void noinline 3382void noinline
2621ev_timer_stop (EV_P_ ev_timer *w) 3383ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2622{ 3384{
2623 clear_pending (EV_A_ (W)w); 3385 clear_pending (EV_A_ (W)w);
2624 if (expect_false (!ev_is_active (w))) 3386 if (expect_false (!ev_is_active (w)))
2625 return; 3387 return;
2626 3388
… …
2646 3408
2647 EV_FREQUENT_CHECK; 3409 EV_FREQUENT_CHECK;
2648} 3410}
2649 3411
2650void noinline 3412void noinline
2651ev_timer_again (EV_P_ ev_timer *w) 3413ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2652{ 3414{
2653 EV_FREQUENT_CHECK; 3415 EV_FREQUENT_CHECK;
3416
3417 clear_pending (EV_A_ (W)w);
2654 3418
2655 if (ev_is_active (w)) 3419 if (ev_is_active (w))
2656 { 3420 {
2657 if (w->repeat) 3421 if (w->repeat)
2658 { 3422 {
… …
2671 3435
2672 EV_FREQUENT_CHECK; 3436 EV_FREQUENT_CHECK;
2673} 3437}
2674 3438
2675ev_tstamp 3439ev_tstamp
2676ev_timer_remaining (EV_P_ ev_timer *w) 3440ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
2677{ 3441{
2678 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 3442 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2679} 3443}
2680 3444
2681#if EV_PERIODIC_ENABLE 3445#if EV_PERIODIC_ENABLE
2682void noinline 3446void noinline
2683ev_periodic_start (EV_P_ ev_periodic *w) 3447ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2684{ 3448{
2685 if (expect_false (ev_is_active (w))) 3449 if (expect_false (ev_is_active (w)))
2686 return; 3450 return;
2687 3451
2688 if (w->reschedule_cb) 3452 if (w->reschedule_cb)
2689 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3453 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2690 else if (w->interval) 3454 else if (w->interval)
2691 { 3455 {
2692 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 3456 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2693 /* this formula differs from the one in periodic_reify because we do not always round up */ 3457 periodic_recalc (EV_A_ w);
2694 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2695 } 3458 }
2696 else 3459 else
2697 ev_at (w) = w->offset; 3460 ev_at (w) = w->offset;
2698 3461
2699 EV_FREQUENT_CHECK; 3462 EV_FREQUENT_CHECK;
… …
2709 3472
2710 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3473 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2711} 3474}
2712 3475
2713void noinline 3476void noinline
2714ev_periodic_stop (EV_P_ ev_periodic *w) 3477ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2715{ 3478{
2716 clear_pending (EV_A_ (W)w); 3479 clear_pending (EV_A_ (W)w);
2717 if (expect_false (!ev_is_active (w))) 3480 if (expect_false (!ev_is_active (w)))
2718 return; 3481 return;
2719 3482
… …
2737 3500
2738 EV_FREQUENT_CHECK; 3501 EV_FREQUENT_CHECK;
2739} 3502}
2740 3503
2741void noinline 3504void noinline
2742ev_periodic_again (EV_P_ ev_periodic *w) 3505ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2743{ 3506{
2744 /* TODO: use adjustheap and recalculation */ 3507 /* TODO: use adjustheap and recalculation */
2745 ev_periodic_stop (EV_A_ w); 3508 ev_periodic_stop (EV_A_ w);
2746 ev_periodic_start (EV_A_ w); 3509 ev_periodic_start (EV_A_ w);
2747} 3510}
… …
2752#endif 3515#endif
2753 3516
2754#if EV_SIGNAL_ENABLE 3517#if EV_SIGNAL_ENABLE
2755 3518
2756void noinline 3519void noinline
2757ev_signal_start (EV_P_ ev_signal *w) 3520ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2758{ 3521{
2759 if (expect_false (ev_is_active (w))) 3522 if (expect_false (ev_is_active (w)))
2760 return; 3523 return;
2761 3524
2762 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 3525 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
2764#if EV_MULTIPLICITY 3527#if EV_MULTIPLICITY
2765 assert (("libev: a signal must not be attached to two different loops", 3528 assert (("libev: a signal must not be attached to two different loops",
2766 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 3529 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2767 3530
2768 signals [w->signum - 1].loop = EV_A; 3531 signals [w->signum - 1].loop = EV_A;
3532 ECB_MEMORY_FENCE_RELEASE;
2769#endif 3533#endif
2770 3534
2771 EV_FREQUENT_CHECK; 3535 EV_FREQUENT_CHECK;
2772 3536
2773#if EV_USE_SIGNALFD 3537#if EV_USE_SIGNALFD
… …
2820 sa.sa_handler = ev_sighandler; 3584 sa.sa_handler = ev_sighandler;
2821 sigfillset (&sa.sa_mask); 3585 sigfillset (&sa.sa_mask);
2822 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3586 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2823 sigaction (w->signum, &sa, 0); 3587 sigaction (w->signum, &sa, 0);
2824 3588
3589 if (origflags & EVFLAG_NOSIGMASK)
3590 {
2825 sigemptyset (&sa.sa_mask); 3591 sigemptyset (&sa.sa_mask);
2826 sigaddset (&sa.sa_mask, w->signum); 3592 sigaddset (&sa.sa_mask, w->signum);
2827 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 3593 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3594 }
2828#endif 3595#endif
2829 } 3596 }
2830 3597
2831 EV_FREQUENT_CHECK; 3598 EV_FREQUENT_CHECK;
2832} 3599}
2833 3600
2834void noinline 3601void noinline
2835ev_signal_stop (EV_P_ ev_signal *w) 3602ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2836{ 3603{
2837 clear_pending (EV_A_ (W)w); 3604 clear_pending (EV_A_ (W)w);
2838 if (expect_false (!ev_is_active (w))) 3605 if (expect_false (!ev_is_active (w)))
2839 return; 3606 return;
2840 3607
… …
2871#endif 3638#endif
2872 3639
2873#if EV_CHILD_ENABLE 3640#if EV_CHILD_ENABLE
2874 3641
2875void 3642void
2876ev_child_start (EV_P_ ev_child *w) 3643ev_child_start (EV_P_ ev_child *w) EV_THROW
2877{ 3644{
2878#if EV_MULTIPLICITY 3645#if EV_MULTIPLICITY
2879 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3646 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2880#endif 3647#endif
2881 if (expect_false (ev_is_active (w))) 3648 if (expect_false (ev_is_active (w)))
… …
2888 3655
2889 EV_FREQUENT_CHECK; 3656 EV_FREQUENT_CHECK;
2890} 3657}
2891 3658
2892void 3659void
2893ev_child_stop (EV_P_ ev_child *w) 3660ev_child_stop (EV_P_ ev_child *w) EV_THROW
2894{ 3661{
2895 clear_pending (EV_A_ (W)w); 3662 clear_pending (EV_A_ (W)w);
2896 if (expect_false (!ev_is_active (w))) 3663 if (expect_false (!ev_is_active (w)))
2897 return; 3664 return;
2898 3665
… …
2973 if (!pend || pend == path) 3740 if (!pend || pend == path)
2974 break; 3741 break;
2975 3742
2976 *pend = 0; 3743 *pend = 0;
2977 w->wd = inotify_add_watch (fs_fd, path, mask); 3744 w->wd = inotify_add_watch (fs_fd, path, mask);
2978 } 3745 }
2979 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3746 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2980 } 3747 }
2981 } 3748 }
2982 3749
2983 if (w->wd >= 0) 3750 if (w->wd >= 0)
… …
3050 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3817 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3051 ofs += sizeof (struct inotify_event) + ev->len; 3818 ofs += sizeof (struct inotify_event) + ev->len;
3052 } 3819 }
3053} 3820}
3054 3821
3055inline_size unsigned int
3056ev_linux_version (void)
3057{
3058 struct utsname buf;
3059 unsigned int v;
3060 int i;
3061 char *p = buf.release;
3062
3063 if (uname (&buf))
3064 return 0;
3065
3066 for (i = 3+1; --i; )
3067 {
3068 unsigned int c = 0;
3069
3070 for (;;)
3071 {
3072 if (*p >= '0' && *p <= '9')
3073 c = c * 10 + *p++ - '0';
3074 else
3075 {
3076 p += *p == '.';
3077 break;
3078 }
3079 }
3080
3081 v = (v << 8) | c;
3082 }
3083
3084 return v;
3085}
3086
3087inline_size void 3822inline_size void ecb_cold
3088ev_check_2625 (EV_P) 3823ev_check_2625 (EV_P)
3089{ 3824{
3090 /* kernels < 2.6.25 are borked 3825 /* kernels < 2.6.25 are borked
3091 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 3826 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3092 */ 3827 */
… …
3097} 3832}
3098 3833
3099inline_size int 3834inline_size int
3100infy_newfd (void) 3835infy_newfd (void)
3101{ 3836{
3102#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 3837#if defined IN_CLOEXEC && defined IN_NONBLOCK
3103 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 3838 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3104 if (fd >= 0) 3839 if (fd >= 0)
3105 return fd; 3840 return fd;
3106#endif 3841#endif
3107 return inotify_init (); 3842 return inotify_init ();
… …
3182#else 3917#else
3183# define EV_LSTAT(p,b) lstat (p, b) 3918# define EV_LSTAT(p,b) lstat (p, b)
3184#endif 3919#endif
3185 3920
3186void 3921void
3187ev_stat_stat (EV_P_ ev_stat *w) 3922ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3188{ 3923{
3189 if (lstat (w->path, &w->attr) < 0) 3924 if (lstat (w->path, &w->attr) < 0)
3190 w->attr.st_nlink = 0; 3925 w->attr.st_nlink = 0;
3191 else if (!w->attr.st_nlink) 3926 else if (!w->attr.st_nlink)
3192 w->attr.st_nlink = 1; 3927 w->attr.st_nlink = 1;
… …
3231 ev_feed_event (EV_A_ w, EV_STAT); 3966 ev_feed_event (EV_A_ w, EV_STAT);
3232 } 3967 }
3233} 3968}
3234 3969
3235void 3970void
3236ev_stat_start (EV_P_ ev_stat *w) 3971ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3237{ 3972{
3238 if (expect_false (ev_is_active (w))) 3973 if (expect_false (ev_is_active (w)))
3239 return; 3974 return;
3240 3975
3241 ev_stat_stat (EV_A_ w); 3976 ev_stat_stat (EV_A_ w);
… …
3262 3997
3263 EV_FREQUENT_CHECK; 3998 EV_FREQUENT_CHECK;
3264} 3999}
3265 4000
3266void 4001void
3267ev_stat_stop (EV_P_ ev_stat *w) 4002ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3268{ 4003{
3269 clear_pending (EV_A_ (W)w); 4004 clear_pending (EV_A_ (W)w);
3270 if (expect_false (!ev_is_active (w))) 4005 if (expect_false (!ev_is_active (w)))
3271 return; 4006 return;
3272 4007
… …
3288} 4023}
3289#endif 4024#endif
3290 4025
3291#if EV_IDLE_ENABLE 4026#if EV_IDLE_ENABLE
3292void 4027void
3293ev_idle_start (EV_P_ ev_idle *w) 4028ev_idle_start (EV_P_ ev_idle *w) EV_THROW
3294{ 4029{
3295 if (expect_false (ev_is_active (w))) 4030 if (expect_false (ev_is_active (w)))
3296 return; 4031 return;
3297 4032
3298 pri_adjust (EV_A_ (W)w); 4033 pri_adjust (EV_A_ (W)w);
… …
3311 4046
3312 EV_FREQUENT_CHECK; 4047 EV_FREQUENT_CHECK;
3313} 4048}
3314 4049
3315void 4050void
3316ev_idle_stop (EV_P_ ev_idle *w) 4051ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3317{ 4052{
3318 clear_pending (EV_A_ (W)w); 4053 clear_pending (EV_A_ (W)w);
3319 if (expect_false (!ev_is_active (w))) 4054 if (expect_false (!ev_is_active (w)))
3320 return; 4055 return;
3321 4056
… …
3335} 4070}
3336#endif 4071#endif
3337 4072
3338#if EV_PREPARE_ENABLE 4073#if EV_PREPARE_ENABLE
3339void 4074void
3340ev_prepare_start (EV_P_ ev_prepare *w) 4075ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
3341{ 4076{
3342 if (expect_false (ev_is_active (w))) 4077 if (expect_false (ev_is_active (w)))
3343 return; 4078 return;
3344 4079
3345 EV_FREQUENT_CHECK; 4080 EV_FREQUENT_CHECK;
… …
3350 4085
3351 EV_FREQUENT_CHECK; 4086 EV_FREQUENT_CHECK;
3352} 4087}
3353 4088
3354void 4089void
3355ev_prepare_stop (EV_P_ ev_prepare *w) 4090ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
3356{ 4091{
3357 clear_pending (EV_A_ (W)w); 4092 clear_pending (EV_A_ (W)w);
3358 if (expect_false (!ev_is_active (w))) 4093 if (expect_false (!ev_is_active (w)))
3359 return; 4094 return;
3360 4095
… …
3373} 4108}
3374#endif 4109#endif
3375 4110
3376#if EV_CHECK_ENABLE 4111#if EV_CHECK_ENABLE
3377void 4112void
3378ev_check_start (EV_P_ ev_check *w) 4113ev_check_start (EV_P_ ev_check *w) EV_THROW
3379{ 4114{
3380 if (expect_false (ev_is_active (w))) 4115 if (expect_false (ev_is_active (w)))
3381 return; 4116 return;
3382 4117
3383 EV_FREQUENT_CHECK; 4118 EV_FREQUENT_CHECK;
… …
3388 4123
3389 EV_FREQUENT_CHECK; 4124 EV_FREQUENT_CHECK;
3390} 4125}
3391 4126
3392void 4127void
3393ev_check_stop (EV_P_ ev_check *w) 4128ev_check_stop (EV_P_ ev_check *w) EV_THROW
3394{ 4129{
3395 clear_pending (EV_A_ (W)w); 4130 clear_pending (EV_A_ (W)w);
3396 if (expect_false (!ev_is_active (w))) 4131 if (expect_false (!ev_is_active (w)))
3397 return; 4132 return;
3398 4133
… …
3411} 4146}
3412#endif 4147#endif
3413 4148
3414#if EV_EMBED_ENABLE 4149#if EV_EMBED_ENABLE
3415void noinline 4150void noinline
3416ev_embed_sweep (EV_P_ ev_embed *w) 4151ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
3417{ 4152{
3418 ev_run (w->other, EVRUN_NOWAIT); 4153 ev_run (w->other, EVRUN_NOWAIT);
3419} 4154}
3420 4155
3421static void 4156static void
… …
3469 ev_idle_stop (EV_A_ idle); 4204 ev_idle_stop (EV_A_ idle);
3470} 4205}
3471#endif 4206#endif
3472 4207
3473void 4208void
3474ev_embed_start (EV_P_ ev_embed *w) 4209ev_embed_start (EV_P_ ev_embed *w) EV_THROW
3475{ 4210{
3476 if (expect_false (ev_is_active (w))) 4211 if (expect_false (ev_is_active (w)))
3477 return; 4212 return;
3478 4213
3479 { 4214 {
… …
3500 4235
3501 EV_FREQUENT_CHECK; 4236 EV_FREQUENT_CHECK;
3502} 4237}
3503 4238
3504void 4239void
3505ev_embed_stop (EV_P_ ev_embed *w) 4240ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
3506{ 4241{
3507 clear_pending (EV_A_ (W)w); 4242 clear_pending (EV_A_ (W)w);
3508 if (expect_false (!ev_is_active (w))) 4243 if (expect_false (!ev_is_active (w)))
3509 return; 4244 return;
3510 4245
… …
3520} 4255}
3521#endif 4256#endif
3522 4257
3523#if EV_FORK_ENABLE 4258#if EV_FORK_ENABLE
3524void 4259void
3525ev_fork_start (EV_P_ ev_fork *w) 4260ev_fork_start (EV_P_ ev_fork *w) EV_THROW
3526{ 4261{
3527 if (expect_false (ev_is_active (w))) 4262 if (expect_false (ev_is_active (w)))
3528 return; 4263 return;
3529 4264
3530 EV_FREQUENT_CHECK; 4265 EV_FREQUENT_CHECK;
… …
3535 4270
3536 EV_FREQUENT_CHECK; 4271 EV_FREQUENT_CHECK;
3537} 4272}
3538 4273
3539void 4274void
3540ev_fork_stop (EV_P_ ev_fork *w) 4275ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
3541{ 4276{
3542 clear_pending (EV_A_ (W)w); 4277 clear_pending (EV_A_ (W)w);
3543 if (expect_false (!ev_is_active (w))) 4278 if (expect_false (!ev_is_active (w)))
3544 return; 4279 return;
3545 4280
… …
3556 4291
3557 EV_FREQUENT_CHECK; 4292 EV_FREQUENT_CHECK;
3558} 4293}
3559#endif 4294#endif
3560 4295
4296#if EV_CLEANUP_ENABLE
4297void
4298ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4299{
4300 if (expect_false (ev_is_active (w)))
4301 return;
4302
4303 EV_FREQUENT_CHECK;
4304
4305 ev_start (EV_A_ (W)w, ++cleanupcnt);
4306 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4307 cleanups [cleanupcnt - 1] = w;
4308
4309 /* cleanup watchers should never keep a refcount on the loop */
4310 ev_unref (EV_A);
4311 EV_FREQUENT_CHECK;
4312}
4313
4314void
4315ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4316{
4317 clear_pending (EV_A_ (W)w);
4318 if (expect_false (!ev_is_active (w)))
4319 return;
4320
4321 EV_FREQUENT_CHECK;
4322 ev_ref (EV_A);
4323
4324 {
4325 int active = ev_active (w);
4326
4327 cleanups [active - 1] = cleanups [--cleanupcnt];
4328 ev_active (cleanups [active - 1]) = active;
4329 }
4330
4331 ev_stop (EV_A_ (W)w);
4332
4333 EV_FREQUENT_CHECK;
4334}
4335#endif
4336
3561#if EV_ASYNC_ENABLE 4337#if EV_ASYNC_ENABLE
3562void 4338void
3563ev_async_start (EV_P_ ev_async *w) 4339ev_async_start (EV_P_ ev_async *w) EV_THROW
3564{ 4340{
3565 if (expect_false (ev_is_active (w))) 4341 if (expect_false (ev_is_active (w)))
3566 return; 4342 return;
3567 4343
3568 w->sent = 0; 4344 w->sent = 0;
… …
3577 4353
3578 EV_FREQUENT_CHECK; 4354 EV_FREQUENT_CHECK;
3579} 4355}
3580 4356
3581void 4357void
3582ev_async_stop (EV_P_ ev_async *w) 4358ev_async_stop (EV_P_ ev_async *w) EV_THROW
3583{ 4359{
3584 clear_pending (EV_A_ (W)w); 4360 clear_pending (EV_A_ (W)w);
3585 if (expect_false (!ev_is_active (w))) 4361 if (expect_false (!ev_is_active (w)))
3586 return; 4362 return;
3587 4363
… …
3598 4374
3599 EV_FREQUENT_CHECK; 4375 EV_FREQUENT_CHECK;
3600} 4376}
3601 4377
3602void 4378void
3603ev_async_send (EV_P_ ev_async *w) 4379ev_async_send (EV_P_ ev_async *w) EV_THROW
3604{ 4380{
3605 w->sent = 1; 4381 w->sent = 1;
3606 evpipe_write (EV_A_ &async_pending); 4382 evpipe_write (EV_A_ &async_pending);
3607} 4383}
3608#endif 4384#endif
… …
3645 4421
3646 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 4422 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3647} 4423}
3648 4424
3649void 4425void
3650ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4426ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
3651{ 4427{
3652 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4428 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3653 4429
3654 if (expect_false (!once)) 4430 if (expect_false (!once))
3655 { 4431 {
… …
3676} 4452}
3677 4453
3678/*****************************************************************************/ 4454/*****************************************************************************/
3679 4455
3680#if EV_WALK_ENABLE 4456#if EV_WALK_ENABLE
3681void 4457void ecb_cold
3682ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4458ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
3683{ 4459{
3684 int i, j; 4460 int i, j;
3685 ev_watcher_list *wl, *wn; 4461 ev_watcher_list *wl, *wn;
3686 4462
3687 if (types & (EV_IO | EV_EMBED)) 4463 if (types & (EV_IO | EV_EMBED))
… …
3730 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4506 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3731#endif 4507#endif
3732 4508
3733#if EV_IDLE_ENABLE 4509#if EV_IDLE_ENABLE
3734 if (types & EV_IDLE) 4510 if (types & EV_IDLE)
3735 for (j = NUMPRI; i--; ) 4511 for (j = NUMPRI; j--; )
3736 for (i = idlecnt [j]; i--; ) 4512 for (i = idlecnt [j]; i--; )
3737 cb (EV_A_ EV_IDLE, idles [j][i]); 4513 cb (EV_A_ EV_IDLE, idles [j][i]);
3738#endif 4514#endif
3739 4515
3740#if EV_FORK_ENABLE 4516#if EV_FORK_ENABLE
… …
3793 4569
3794#if EV_MULTIPLICITY 4570#if EV_MULTIPLICITY
3795 #include "ev_wrap.h" 4571 #include "ev_wrap.h"
3796#endif 4572#endif
3797 4573
3798EV_CPP(})
3799

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