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Comparing libev/ev.c (file contents):
Revision 1.356 by root, Fri Oct 22 11:21:52 2010 UTC vs.
Revision 1.440 by root, Tue May 29 21:37:14 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
389/* 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 */
390# ifndef IN_DONT_FOLLOW 410# ifndef IN_DONT_FOLLOW
391# undef EV_USE_INOTIFY 411# undef EV_USE_INOTIFY
392# define EV_USE_INOTIFY 0 412# define EV_USE_INOTIFY 0
393# endif 413# endif
394#endif
395
396#if EV_SELECT_IS_WINSOCKET
397# include <winsock.h>
398#endif 414#endif
399 415
400#if EV_USE_EVENTFD 416#if EV_USE_EVENTFD
401/* 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 */
402# include <stdint.h> 418# include <stdint.h>
442#else 458#else
443# define EV_FREQUENT_CHECK do { } while (0) 459# define EV_FREQUENT_CHECK do { } while (0)
444#endif 460#endif
445 461
446/* 462/*
447 * This is used to avoid floating point rounding problems. 463 * This is used to work around floating point rounding problems.
448 * It is added to ev_rt_now when scheduling periodics
449 * to ensure progress, time-wise, even when rounding
450 * errors are against us.
451 * This value is good at least till the year 4000. 464 * This value is good at least till the year 4000.
452 * Better solutions welcome.
453 */ 465 */
454#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 */
455 468
456#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) */
457#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) */
458 471
459#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)
460#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)
461 474
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;
462#if __GNUC__ >= 4 519 #if __GNUC__
463# define expect(expr,value) __builtin_expect ((expr),(value)) 520 typedef signed long long int64_t;
464# 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;
465#else 536#else
466# define expect(expr,value) (expr) 537 #include <inttypes.h>
467# define noinline 538 #if UINTMAX_MAX > 0xffffffffU
468# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 539 #define ECB_PTRSIZE 8
469# define inline 540 #else
541 #define ECB_PTRSIZE 4
542 #endif
470# 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)))
471#endif 557 #endif
558#endif
472 559
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_CPP98 (__cplusplus >= 199711L)
565#define ECB_CPP11 (__cplusplus >= 201103L)
566
567/*****************************************************************************/
568
569/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
570/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
571
572#if ECB_NO_THREADS
573 #define ECB_NO_SMP 1
574#endif
575
576#if ECB_NO_SMP
577 #define ECB_MEMORY_FENCE do { } while (0)
578#endif
579
580#ifndef ECB_MEMORY_FENCE
581 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
582 #if __i386 || __i386__
583 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
584 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
585 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
586 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
587 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
588 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
589 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
590 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
591 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
592 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
593 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
594 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
595 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
596 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
597 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
598 #elif __sparc || __sparc__
599 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
600 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
601 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
602 #elif defined __s390__ || defined __s390x__
603 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
604 #elif defined __mips__
605 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
606 #elif defined __alpha__
607 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
608 #elif defined __hppa__
609 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
610 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
611 #elif defined __ia64__
612 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
613 #endif
614 #endif
615#endif
616
617#ifndef ECB_MEMORY_FENCE
618 #if ECB_GCC_VERSION(4,7)
619 /* see comment below about the C11 memory model. in short - avoid */
620 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
621 #elif defined __clang && __has_feature (cxx_atomic)
622 /* see above */
623 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
624 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
625 #define ECB_MEMORY_FENCE __sync_synchronize ()
626 #elif _MSC_VER >= 1400 /* VC++ 2005 */
627 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
628 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
629 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
630 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
631 #elif defined _WIN32
632 #include <WinNT.h>
633 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
634 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
635 #include <mbarrier.h>
636 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
637 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
638 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
639 #elif __xlC__
640 #define ECB_MEMORY_FENCE __sync ()
641 #endif
642#endif
643
644#ifndef ECB_MEMORY_FENCE
645 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
646 /* we assume that these memory fences work on all variables/all memory accesses, */
647 /* not just C11 atomics and atomic accesses */
648 #include <stdatomic.h>
649 /* unfortunately, the C11 memory model seems to be very limited, and unable to express */
650 /* simple barrier semantics. That means we need to take out thor's hammer. */
651 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
652 #endif
653#endif
654
655#ifndef ECB_MEMORY_FENCE
656 #if !ECB_AVOID_PTHREADS
657 /*
658 * if you get undefined symbol references to pthread_mutex_lock,
659 * or failure to find pthread.h, then you should implement
660 * the ECB_MEMORY_FENCE operations for your cpu/compiler
661 * OR provide pthread.h and link against the posix thread library
662 * of your system.
663 */
664 #include <pthread.h>
665 #define ECB_NEEDS_PTHREADS 1
666 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
667
668 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
669 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
670 #endif
671#endif
672
673#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
674 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
675#endif
676
677#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
678 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
679#endif
680
681/*****************************************************************************/
682
683#if __cplusplus
684 #define ecb_inline static inline
685#elif ECB_GCC_VERSION(2,5)
686 #define ecb_inline static __inline__
687#elif ECB_C99
688 #define ecb_inline static inline
689#else
690 #define ecb_inline static
691#endif
692
693#if ECB_GCC_VERSION(3,3)
694 #define ecb_restrict __restrict__
695#elif ECB_C99
696 #define ecb_restrict restrict
697#else
698 #define ecb_restrict
699#endif
700
701typedef int ecb_bool;
702
703#define ECB_CONCAT_(a, b) a ## b
704#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
705#define ECB_STRINGIFY_(a) # a
706#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
707
708#define ecb_function_ ecb_inline
709
710#if ECB_GCC_VERSION(3,1)
711 #define ecb_attribute(attrlist) __attribute__(attrlist)
712 #define ecb_is_constant(expr) __builtin_constant_p (expr)
713 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
714 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
715#else
716 #define ecb_attribute(attrlist)
717 #define ecb_is_constant(expr) 0
718 #define ecb_expect(expr,value) (expr)
719 #define ecb_prefetch(addr,rw,locality)
720#endif
721
722/* no emulation for ecb_decltype */
723#if ECB_GCC_VERSION(4,5)
724 #define ecb_decltype(x) __decltype(x)
725#elif ECB_GCC_VERSION(3,0)
726 #define ecb_decltype(x) __typeof(x)
727#endif
728
729#define ecb_noinline ecb_attribute ((__noinline__))
730#define ecb_unused ecb_attribute ((__unused__))
731#define ecb_const ecb_attribute ((__const__))
732#define ecb_pure ecb_attribute ((__pure__))
733
734#if ECB_C11
735 #define ecb_noreturn _Noreturn
736#else
737 #define ecb_noreturn ecb_attribute ((__noreturn__))
738#endif
739
740#if ECB_GCC_VERSION(4,3)
741 #define ecb_artificial ecb_attribute ((__artificial__))
742 #define ecb_hot ecb_attribute ((__hot__))
743 #define ecb_cold ecb_attribute ((__cold__))
744#else
745 #define ecb_artificial
746 #define ecb_hot
747 #define ecb_cold
748#endif
749
750/* put around conditional expressions if you are very sure that the */
751/* expression is mostly true or mostly false. note that these return */
752/* booleans, not the expression. */
473#define expect_false(expr) expect ((expr) != 0, 0) 753#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
474#define expect_true(expr) expect ((expr) != 0, 1) 754#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
755/* for compatibility to the rest of the world */
756#define ecb_likely(expr) ecb_expect_true (expr)
757#define ecb_unlikely(expr) ecb_expect_false (expr)
758
759/* count trailing zero bits and count # of one bits */
760#if ECB_GCC_VERSION(3,4)
761 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
762 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
763 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
764 #define ecb_ctz32(x) __builtin_ctz (x)
765 #define ecb_ctz64(x) __builtin_ctzll (x)
766 #define ecb_popcount32(x) __builtin_popcount (x)
767 /* no popcountll */
768#else
769 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
770 ecb_function_ int
771 ecb_ctz32 (uint32_t x)
772 {
773 int r = 0;
774
775 x &= ~x + 1; /* this isolates the lowest bit */
776
777#if ECB_branchless_on_i386
778 r += !!(x & 0xaaaaaaaa) << 0;
779 r += !!(x & 0xcccccccc) << 1;
780 r += !!(x & 0xf0f0f0f0) << 2;
781 r += !!(x & 0xff00ff00) << 3;
782 r += !!(x & 0xffff0000) << 4;
783#else
784 if (x & 0xaaaaaaaa) r += 1;
785 if (x & 0xcccccccc) r += 2;
786 if (x & 0xf0f0f0f0) r += 4;
787 if (x & 0xff00ff00) r += 8;
788 if (x & 0xffff0000) r += 16;
789#endif
790
791 return r;
792 }
793
794 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
795 ecb_function_ int
796 ecb_ctz64 (uint64_t x)
797 {
798 int shift = x & 0xffffffffU ? 0 : 32;
799 return ecb_ctz32 (x >> shift) + shift;
800 }
801
802 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
803 ecb_function_ int
804 ecb_popcount32 (uint32_t x)
805 {
806 x -= (x >> 1) & 0x55555555;
807 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
808 x = ((x >> 4) + x) & 0x0f0f0f0f;
809 x *= 0x01010101;
810
811 return x >> 24;
812 }
813
814 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
815 ecb_function_ int ecb_ld32 (uint32_t x)
816 {
817 int r = 0;
818
819 if (x >> 16) { x >>= 16; r += 16; }
820 if (x >> 8) { x >>= 8; r += 8; }
821 if (x >> 4) { x >>= 4; r += 4; }
822 if (x >> 2) { x >>= 2; r += 2; }
823 if (x >> 1) { r += 1; }
824
825 return r;
826 }
827
828 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
829 ecb_function_ int ecb_ld64 (uint64_t x)
830 {
831 int r = 0;
832
833 if (x >> 32) { x >>= 32; r += 32; }
834
835 return r + ecb_ld32 (x);
836 }
837#endif
838
839ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
840ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
841ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
842ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
843
844ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
845ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
846{
847 return ( (x * 0x0802U & 0x22110U)
848 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
849}
850
851ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
852ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
853{
854 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
855 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
856 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
857 x = ( x >> 8 ) | ( x << 8);
858
859 return x;
860}
861
862ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
863ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
864{
865 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
866 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
867 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
868 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
869 x = ( x >> 16 ) | ( x << 16);
870
871 return x;
872}
873
874/* popcount64 is only available on 64 bit cpus as gcc builtin */
875/* so for this version we are lazy */
876ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
877ecb_function_ int
878ecb_popcount64 (uint64_t x)
879{
880 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
881}
882
883ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
884ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
885ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
886ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
887ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
888ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
889ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
890ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
891
892ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
893ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
894ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
895ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
896ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
897ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
898ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
899ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
900
901#if ECB_GCC_VERSION(4,3)
902 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
903 #define ecb_bswap32(x) __builtin_bswap32 (x)
904 #define ecb_bswap64(x) __builtin_bswap64 (x)
905#else
906 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
907 ecb_function_ uint16_t
908 ecb_bswap16 (uint16_t x)
909 {
910 return ecb_rotl16 (x, 8);
911 }
912
913 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
914 ecb_function_ uint32_t
915 ecb_bswap32 (uint32_t x)
916 {
917 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
918 }
919
920 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
921 ecb_function_ uint64_t
922 ecb_bswap64 (uint64_t x)
923 {
924 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
925 }
926#endif
927
928#if ECB_GCC_VERSION(4,5)
929 #define ecb_unreachable() __builtin_unreachable ()
930#else
931 /* this seems to work fine, but gcc always emits a warning for it :/ */
932 ecb_inline void ecb_unreachable (void) ecb_noreturn;
933 ecb_inline void ecb_unreachable (void) { }
934#endif
935
936/* try to tell the compiler that some condition is definitely true */
937#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
938
939ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
940ecb_inline unsigned char
941ecb_byteorder_helper (void)
942{
943 const uint32_t u = 0x11223344;
944 return *(unsigned char *)&u;
945}
946
947ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
948ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
949ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
950ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
951
952#if ECB_GCC_VERSION(3,0) || ECB_C99
953 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
954#else
955 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
956#endif
957
958#if __cplusplus
959 template<typename T>
960 static inline T ecb_div_rd (T val, T div)
961 {
962 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
963 }
964 template<typename T>
965 static inline T ecb_div_ru (T val, T div)
966 {
967 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
968 }
969#else
970 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
971 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
972#endif
973
974#if ecb_cplusplus_does_not_suck
975 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
976 template<typename T, int N>
977 static inline int ecb_array_length (const T (&arr)[N])
978 {
979 return N;
980 }
981#else
982 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
983#endif
984
985#endif
986
987/* ECB.H END */
988
989#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
990/* if your architecture doesn't need memory fences, e.g. because it is
991 * single-cpu/core, or if you use libev in a project that doesn't use libev
992 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
993 * libev, in which cases the memory fences become nops.
994 * alternatively, you can remove this #error and link against libpthread,
995 * which will then provide the memory fences.
996 */
997# error "memory fences not defined for your architecture, please report"
998#endif
999
1000#ifndef ECB_MEMORY_FENCE
1001# define ECB_MEMORY_FENCE do { } while (0)
1002# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1003# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1004#endif
1005
1006#define expect_false(cond) ecb_expect_false (cond)
1007#define expect_true(cond) ecb_expect_true (cond)
1008#define noinline ecb_noinline
1009
475#define inline_size static inline 1010#define inline_size ecb_inline
476 1011
477#if EV_FEATURE_CODE 1012#if EV_FEATURE_CODE
478# define inline_speed static inline 1013# define inline_speed ecb_inline
479#else 1014#else
480# define inline_speed static noinline 1015# define inline_speed static noinline
481#endif 1016#endif
482 1017
483#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1018#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
522# include "ev_win32.c" 1057# include "ev_win32.c"
523#endif 1058#endif
524 1059
525/*****************************************************************************/ 1060/*****************************************************************************/
526 1061
1062/* define a suitable floor function (only used by periodics atm) */
1063
1064#if EV_USE_FLOOR
1065# include <math.h>
1066# define ev_floor(v) floor (v)
1067#else
1068
1069#include <float.h>
1070
1071/* a floor() replacement function, should be independent of ev_tstamp type */
1072static ev_tstamp noinline
1073ev_floor (ev_tstamp v)
1074{
1075 /* the choice of shift factor is not terribly important */
1076#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1077 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1078#else
1079 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1080#endif
1081
1082 /* argument too large for an unsigned long? */
1083 if (expect_false (v >= shift))
1084 {
1085 ev_tstamp f;
1086
1087 if (v == v - 1.)
1088 return v; /* very large number */
1089
1090 f = shift * ev_floor (v * (1. / shift));
1091 return f + ev_floor (v - f);
1092 }
1093
1094 /* special treatment for negative args? */
1095 if (expect_false (v < 0.))
1096 {
1097 ev_tstamp f = -ev_floor (-v);
1098
1099 return f - (f == v ? 0 : 1);
1100 }
1101
1102 /* fits into an unsigned long */
1103 return (unsigned long)v;
1104}
1105
1106#endif
1107
1108/*****************************************************************************/
1109
527#ifdef __linux 1110#ifdef __linux
528# include <sys/utsname.h> 1111# include <sys/utsname.h>
529#endif 1112#endif
530 1113
531static unsigned int noinline 1114static unsigned int noinline ecb_cold
532ev_linux_version (void) 1115ev_linux_version (void)
533{ 1116{
534#ifdef __linux 1117#ifdef __linux
1118 unsigned int v = 0;
535 struct utsname buf; 1119 struct utsname buf;
536 unsigned int v;
537 int i; 1120 int i;
538 char *p = buf.release; 1121 char *p = buf.release;
539 1122
540 if (uname (&buf)) 1123 if (uname (&buf))
541 return 0; 1124 return 0;
565} 1148}
566 1149
567/*****************************************************************************/ 1150/*****************************************************************************/
568 1151
569#if EV_AVOID_STDIO 1152#if EV_AVOID_STDIO
570static void noinline 1153static void noinline ecb_cold
571ev_printerr (const char *msg) 1154ev_printerr (const char *msg)
572{ 1155{
573 write (STDERR_FILENO, msg, strlen (msg)); 1156 write (STDERR_FILENO, msg, strlen (msg));
574} 1157}
575#endif 1158#endif
576 1159
577static void (*syserr_cb)(const char *msg); 1160static void (*syserr_cb)(const char *msg) EV_THROW;
578 1161
579void 1162void ecb_cold
580ev_set_syserr_cb (void (*cb)(const char *msg)) 1163ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
581{ 1164{
582 syserr_cb = cb; 1165 syserr_cb = cb;
583} 1166}
584 1167
585static void noinline 1168static void noinline ecb_cold
586ev_syserr (const char *msg) 1169ev_syserr (const char *msg)
587{ 1170{
588 if (!msg) 1171 if (!msg)
589 msg = "(libev) system error"; 1172 msg = "(libev) system error";
590 1173
591 if (syserr_cb) 1174 if (syserr_cb)
592 syserr_cb (msg); 1175 syserr_cb (msg);
593 else 1176 else
594 { 1177 {
595#if EV_AVOID_STDIO 1178#if EV_AVOID_STDIO
596 const char *err = strerror (errno);
597
598 ev_printerr (msg); 1179 ev_printerr (msg);
599 ev_printerr (": "); 1180 ev_printerr (": ");
600 ev_printerr (err); 1181 ev_printerr (strerror (errno));
601 ev_printerr ("\n"); 1182 ev_printerr ("\n");
602#else 1183#else
603 perror (msg); 1184 perror (msg);
604#endif 1185#endif
605 abort (); 1186 abort ();
606 } 1187 }
607} 1188}
608 1189
609static void * 1190static void *
610ev_realloc_emul (void *ptr, long size) 1191ev_realloc_emul (void *ptr, long size) EV_THROW
611{ 1192{
612#if __GLIBC__ 1193#if __GLIBC__
613 return realloc (ptr, size); 1194 return realloc (ptr, size);
614#else 1195#else
615 /* some systems, notably openbsd and darwin, fail to properly 1196 /* some systems, notably openbsd and darwin, fail to properly
623 free (ptr); 1204 free (ptr);
624 return 0; 1205 return 0;
625#endif 1206#endif
626} 1207}
627 1208
628static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1209static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
629 1210
630void 1211void ecb_cold
631ev_set_allocator (void *(*cb)(void *ptr, long size)) 1212ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
632{ 1213{
633 alloc = cb; 1214 alloc = cb;
634} 1215}
635 1216
636inline_speed void * 1217inline_speed void *
639 ptr = alloc (ptr, size); 1220 ptr = alloc (ptr, size);
640 1221
641 if (!ptr && size) 1222 if (!ptr && size)
642 { 1223 {
643#if EV_AVOID_STDIO 1224#if EV_AVOID_STDIO
644 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1225 ev_printerr ("(libev) memory allocation failed, aborting.\n");
645#else 1226#else
646 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1227 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
647#endif 1228#endif
648 abort (); 1229 abort ();
649 } 1230 }
650 1231
651 return ptr; 1232 return ptr;
668 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1249 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
669 unsigned char unused; 1250 unsigned char unused;
670#if EV_USE_EPOLL 1251#if EV_USE_EPOLL
671 unsigned int egen; /* generation counter to counter epoll bugs */ 1252 unsigned int egen; /* generation counter to counter epoll bugs */
672#endif 1253#endif
673#if EV_SELECT_IS_WINSOCKET 1254#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
674 SOCKET handle; 1255 SOCKET handle;
1256#endif
1257#if EV_USE_IOCP
1258 OVERLAPPED or, ow;
675#endif 1259#endif
676} ANFD; 1260} ANFD;
677 1261
678/* stores the pending event set for a given watcher */ 1262/* stores the pending event set for a given watcher */
679typedef struct 1263typedef struct
721 #undef VAR 1305 #undef VAR
722 }; 1306 };
723 #include "ev_wrap.h" 1307 #include "ev_wrap.h"
724 1308
725 static struct ev_loop default_loop_struct; 1309 static struct ev_loop default_loop_struct;
726 struct ev_loop *ev_default_loop_ptr; 1310 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
727 1311
728#else 1312#else
729 1313
730 ev_tstamp ev_rt_now; 1314 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
731 #define VAR(name,decl) static decl; 1315 #define VAR(name,decl) static decl;
732 #include "ev_vars.h" 1316 #include "ev_vars.h"
733 #undef VAR 1317 #undef VAR
734 1318
735 static int ev_default_loop_ptr; 1319 static int ev_default_loop_ptr;
750 1334
751/*****************************************************************************/ 1335/*****************************************************************************/
752 1336
753#ifndef EV_HAVE_EV_TIME 1337#ifndef EV_HAVE_EV_TIME
754ev_tstamp 1338ev_tstamp
755ev_time (void) 1339ev_time (void) EV_THROW
756{ 1340{
757#if EV_USE_REALTIME 1341#if EV_USE_REALTIME
758 if (expect_true (have_realtime)) 1342 if (expect_true (have_realtime))
759 { 1343 {
760 struct timespec ts; 1344 struct timespec ts;
784 return ev_time (); 1368 return ev_time ();
785} 1369}
786 1370
787#if EV_MULTIPLICITY 1371#if EV_MULTIPLICITY
788ev_tstamp 1372ev_tstamp
789ev_now (EV_P) 1373ev_now (EV_P) EV_THROW
790{ 1374{
791 return ev_rt_now; 1375 return ev_rt_now;
792} 1376}
793#endif 1377#endif
794 1378
795void 1379void
796ev_sleep (ev_tstamp delay) 1380ev_sleep (ev_tstamp delay) EV_THROW
797{ 1381{
798 if (delay > 0.) 1382 if (delay > 0.)
799 { 1383 {
800#if EV_USE_NANOSLEEP 1384#if EV_USE_NANOSLEEP
801 struct timespec ts; 1385 struct timespec ts;
802 1386
803 EV_TS_SET (ts, delay); 1387 EV_TS_SET (ts, delay);
804 nanosleep (&ts, 0); 1388 nanosleep (&ts, 0);
805#elif defined(_WIN32) 1389#elif defined _WIN32
806 Sleep ((unsigned long)(delay * 1e3)); 1390 Sleep ((unsigned long)(delay * 1e3));
807#else 1391#else
808 struct timeval tv; 1392 struct timeval tv;
809 1393
810 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1394 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
829 1413
830 do 1414 do
831 ncur <<= 1; 1415 ncur <<= 1;
832 while (cnt > ncur); 1416 while (cnt > ncur);
833 1417
834 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1418 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
835 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1419 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
836 { 1420 {
837 ncur *= elem; 1421 ncur *= elem;
838 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1422 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
839 ncur = ncur - sizeof (void *) * 4; 1423 ncur = ncur - sizeof (void *) * 4;
841 } 1425 }
842 1426
843 return ncur; 1427 return ncur;
844} 1428}
845 1429
846static noinline void * 1430static void * noinline ecb_cold
847array_realloc (int elem, void *base, int *cur, int cnt) 1431array_realloc (int elem, void *base, int *cur, int cnt)
848{ 1432{
849 *cur = array_nextsize (elem, *cur, cnt); 1433 *cur = array_nextsize (elem, *cur, cnt);
850 return ev_realloc (base, elem * *cur); 1434 return ev_realloc (base, elem * *cur);
851} 1435}
854 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1438 memset ((void *)(base), 0, sizeof (*(base)) * (count))
855 1439
856#define array_needsize(type,base,cur,cnt,init) \ 1440#define array_needsize(type,base,cur,cnt,init) \
857 if (expect_false ((cnt) > (cur))) \ 1441 if (expect_false ((cnt) > (cur))) \
858 { \ 1442 { \
859 int ocur_ = (cur); \ 1443 int ecb_unused ocur_ = (cur); \
860 (base) = (type *)array_realloc \ 1444 (base) = (type *)array_realloc \
861 (sizeof (type), (base), &(cur), (cnt)); \ 1445 (sizeof (type), (base), &(cur), (cnt)); \
862 init ((base) + (ocur_), (cur) - ocur_); \ 1446 init ((base) + (ocur_), (cur) - ocur_); \
863 } 1447 }
864 1448
882pendingcb (EV_P_ ev_prepare *w, int revents) 1466pendingcb (EV_P_ ev_prepare *w, int revents)
883{ 1467{
884} 1468}
885 1469
886void noinline 1470void noinline
887ev_feed_event (EV_P_ void *w, int revents) 1471ev_feed_event (EV_P_ void *w, int revents) EV_THROW
888{ 1472{
889 W w_ = (W)w; 1473 W w_ = (W)w;
890 int pri = ABSPRI (w_); 1474 int pri = ABSPRI (w_);
891 1475
892 if (expect_false (w_->pending)) 1476 if (expect_false (w_->pending))
896 w_->pending = ++pendingcnt [pri]; 1480 w_->pending = ++pendingcnt [pri];
897 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1481 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
898 pendings [pri][w_->pending - 1].w = w_; 1482 pendings [pri][w_->pending - 1].w = w_;
899 pendings [pri][w_->pending - 1].events = revents; 1483 pendings [pri][w_->pending - 1].events = revents;
900 } 1484 }
1485
1486 pendingpri = NUMPRI - 1;
901} 1487}
902 1488
903inline_speed void 1489inline_speed void
904feed_reverse (EV_P_ W w) 1490feed_reverse (EV_P_ W w)
905{ 1491{
951 if (expect_true (!anfd->reify)) 1537 if (expect_true (!anfd->reify))
952 fd_event_nocheck (EV_A_ fd, revents); 1538 fd_event_nocheck (EV_A_ fd, revents);
953} 1539}
954 1540
955void 1541void
956ev_feed_fd_event (EV_P_ int fd, int revents) 1542ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
957{ 1543{
958 if (fd >= 0 && fd < anfdmax) 1544 if (fd >= 0 && fd < anfdmax)
959 fd_event_nocheck (EV_A_ fd, revents); 1545 fd_event_nocheck (EV_A_ fd, revents);
960} 1546}
961 1547
964inline_size void 1550inline_size void
965fd_reify (EV_P) 1551fd_reify (EV_P)
966{ 1552{
967 int i; 1553 int i;
968 1554
1555#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1556 for (i = 0; i < fdchangecnt; ++i)
1557 {
1558 int fd = fdchanges [i];
1559 ANFD *anfd = anfds + fd;
1560
1561 if (anfd->reify & EV__IOFDSET && anfd->head)
1562 {
1563 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1564
1565 if (handle != anfd->handle)
1566 {
1567 unsigned long arg;
1568
1569 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1570
1571 /* handle changed, but fd didn't - we need to do it in two steps */
1572 backend_modify (EV_A_ fd, anfd->events, 0);
1573 anfd->events = 0;
1574 anfd->handle = handle;
1575 }
1576 }
1577 }
1578#endif
1579
969 for (i = 0; i < fdchangecnt; ++i) 1580 for (i = 0; i < fdchangecnt; ++i)
970 { 1581 {
971 int fd = fdchanges [i]; 1582 int fd = fdchanges [i];
972 ANFD *anfd = anfds + fd; 1583 ANFD *anfd = anfds + fd;
973 ev_io *w; 1584 ev_io *w;
975 unsigned char o_events = anfd->events; 1586 unsigned char o_events = anfd->events;
976 unsigned char o_reify = anfd->reify; 1587 unsigned char o_reify = anfd->reify;
977 1588
978 anfd->reify = 0; 1589 anfd->reify = 0;
979 1590
980#if EV_SELECT_IS_WINSOCKET
981 if (o_reify & EV__IOFDSET)
982 {
983 unsigned long arg;
984 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
985 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
986 }
987#endif
988
989 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 1591 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
990 { 1592 {
991 anfd->events = 0; 1593 anfd->events = 0;
992 1594
993 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1595 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1018 fdchanges [fdchangecnt - 1] = fd; 1620 fdchanges [fdchangecnt - 1] = fd;
1019 } 1621 }
1020} 1622}
1021 1623
1022/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1624/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1023inline_speed void 1625inline_speed void ecb_cold
1024fd_kill (EV_P_ int fd) 1626fd_kill (EV_P_ int fd)
1025{ 1627{
1026 ev_io *w; 1628 ev_io *w;
1027 1629
1028 while ((w = (ev_io *)anfds [fd].head)) 1630 while ((w = (ev_io *)anfds [fd].head))
1031 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1633 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1032 } 1634 }
1033} 1635}
1034 1636
1035/* check whether the given fd is actually valid, for error recovery */ 1637/* check whether the given fd is actually valid, for error recovery */
1036inline_size int 1638inline_size int ecb_cold
1037fd_valid (int fd) 1639fd_valid (int fd)
1038{ 1640{
1039#ifdef _WIN32 1641#ifdef _WIN32
1040 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1642 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1041#else 1643#else
1042 return fcntl (fd, F_GETFD) != -1; 1644 return fcntl (fd, F_GETFD) != -1;
1043#endif 1645#endif
1044} 1646}
1045 1647
1046/* called on EBADF to verify fds */ 1648/* called on EBADF to verify fds */
1047static void noinline 1649static void noinline ecb_cold
1048fd_ebadf (EV_P) 1650fd_ebadf (EV_P)
1049{ 1651{
1050 int fd; 1652 int fd;
1051 1653
1052 for (fd = 0; fd < anfdmax; ++fd) 1654 for (fd = 0; fd < anfdmax; ++fd)
1054 if (!fd_valid (fd) && errno == EBADF) 1656 if (!fd_valid (fd) && errno == EBADF)
1055 fd_kill (EV_A_ fd); 1657 fd_kill (EV_A_ fd);
1056} 1658}
1057 1659
1058/* called on ENOMEM in select/poll to kill some fds and retry */ 1660/* called on ENOMEM in select/poll to kill some fds and retry */
1059static void noinline 1661static void noinline ecb_cold
1060fd_enomem (EV_P) 1662fd_enomem (EV_P)
1061{ 1663{
1062 int fd; 1664 int fd;
1063 1665
1064 for (fd = anfdmax; fd--; ) 1666 for (fd = anfdmax; fd--; )
1259 1861
1260/*****************************************************************************/ 1862/*****************************************************************************/
1261 1863
1262#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 1864#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1263 1865
1264static void noinline 1866static void noinline ecb_cold
1265evpipe_init (EV_P) 1867evpipe_init (EV_P)
1266{ 1868{
1267 if (!ev_is_active (&pipe_w)) 1869 if (!ev_is_active (&pipe_w))
1268 { 1870 {
1269# if EV_USE_EVENTFD 1871# if EV_USE_EVENTFD
1291 ev_io_start (EV_A_ &pipe_w); 1893 ev_io_start (EV_A_ &pipe_w);
1292 ev_unref (EV_A); /* watcher should not keep loop alive */ 1894 ev_unref (EV_A); /* watcher should not keep loop alive */
1293 } 1895 }
1294} 1896}
1295 1897
1296inline_size void 1898inline_speed void
1297evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1899evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1298{ 1900{
1299 if (!*flag) 1901 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1902
1903 if (expect_true (*flag))
1904 return;
1905
1906 *flag = 1;
1907 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1908
1909 pipe_write_skipped = 1;
1910
1911 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1912
1913 if (pipe_write_wanted)
1300 { 1914 {
1915 int old_errno;
1916
1917 pipe_write_skipped = 0;
1918 ECB_MEMORY_FENCE_RELEASE;
1919
1301 int old_errno = errno; /* save errno because write might clobber it */ 1920 old_errno = errno; /* save errno because write will clobber it */
1302 char dummy;
1303
1304 *flag = 1;
1305 1921
1306#if EV_USE_EVENTFD 1922#if EV_USE_EVENTFD
1307 if (evfd >= 0) 1923 if (evfd >= 0)
1308 { 1924 {
1309 uint64_t counter = 1; 1925 uint64_t counter = 1;
1310 write (evfd, &counter, sizeof (uint64_t)); 1926 write (evfd, &counter, sizeof (uint64_t));
1311 } 1927 }
1312 else 1928 else
1313#endif 1929#endif
1314 /* win32 people keep sending patches that change this write() to send() */ 1930 {
1315 /* and then run away. but send() is wrong, it wants a socket handle on win32 */ 1931#ifdef _WIN32
1316 /* so when you think this write should be a send instead, please find out */ 1932 WSABUF buf;
1317 /* where your send() is from - it's definitely not the microsoft send, and */ 1933 DWORD sent;
1318 /* tell me. thank you. */ 1934 buf.buf = &buf;
1935 buf.len = 1;
1936 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
1937#else
1319 write (evpipe [1], &dummy, 1); 1938 write (evpipe [1], &(evpipe [1]), 1);
1939#endif
1940 }
1320 1941
1321 errno = old_errno; 1942 errno = old_errno;
1322 } 1943 }
1323} 1944}
1324 1945
1327static void 1948static void
1328pipecb (EV_P_ ev_io *iow, int revents) 1949pipecb (EV_P_ ev_io *iow, int revents)
1329{ 1950{
1330 int i; 1951 int i;
1331 1952
1953 if (revents & EV_READ)
1954 {
1332#if EV_USE_EVENTFD 1955#if EV_USE_EVENTFD
1333 if (evfd >= 0) 1956 if (evfd >= 0)
1334 { 1957 {
1335 uint64_t counter; 1958 uint64_t counter;
1336 read (evfd, &counter, sizeof (uint64_t)); 1959 read (evfd, &counter, sizeof (uint64_t));
1337 } 1960 }
1338 else 1961 else
1339#endif 1962#endif
1340 { 1963 {
1341 char dummy; 1964 char dummy[4];
1342 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 1965#ifdef _WIN32
1966 WSABUF buf;
1967 DWORD recvd;
1968 DWORD flags = 0;
1969 buf.buf = dummy;
1970 buf.len = sizeof (dummy);
1971 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
1972#else
1343 read (evpipe [0], &dummy, 1); 1973 read (evpipe [0], &dummy, sizeof (dummy));
1974#endif
1975 }
1344 } 1976 }
1345 1977
1978 pipe_write_skipped = 0;
1979
1980 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1981
1982#if EV_SIGNAL_ENABLE
1346 if (sig_pending) 1983 if (sig_pending)
1347 { 1984 {
1348 sig_pending = 0; 1985 sig_pending = 0;
1986
1987 ECB_MEMORY_FENCE;
1349 1988
1350 for (i = EV_NSIG - 1; i--; ) 1989 for (i = EV_NSIG - 1; i--; )
1351 if (expect_false (signals [i].pending)) 1990 if (expect_false (signals [i].pending))
1352 ev_feed_signal_event (EV_A_ i + 1); 1991 ev_feed_signal_event (EV_A_ i + 1);
1353 } 1992 }
1993#endif
1354 1994
1355#if EV_ASYNC_ENABLE 1995#if EV_ASYNC_ENABLE
1356 if (async_pending) 1996 if (async_pending)
1357 { 1997 {
1358 async_pending = 0; 1998 async_pending = 0;
1999
2000 ECB_MEMORY_FENCE;
1359 2001
1360 for (i = asynccnt; i--; ) 2002 for (i = asynccnt; i--; )
1361 if (asyncs [i]->sent) 2003 if (asyncs [i]->sent)
1362 { 2004 {
1363 asyncs [i]->sent = 0; 2005 asyncs [i]->sent = 0;
2006 ECB_MEMORY_FENCE_RELEASE;
1364 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2007 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1365 } 2008 }
1366 } 2009 }
1367#endif 2010#endif
1368} 2011}
1369 2012
1370/*****************************************************************************/ 2013/*****************************************************************************/
1371 2014
2015void
2016ev_feed_signal (int signum) EV_THROW
2017{
2018#if EV_MULTIPLICITY
2019 EV_P = signals [signum - 1].loop;
2020
2021 if (!EV_A)
2022 return;
2023#endif
2024
2025 if (!ev_active (&pipe_w))
2026 return;
2027
2028 signals [signum - 1].pending = 1;
2029 evpipe_write (EV_A_ &sig_pending);
2030}
2031
1372static void 2032static void
1373ev_sighandler (int signum) 2033ev_sighandler (int signum)
1374{ 2034{
1375#if EV_MULTIPLICITY
1376 EV_P = signals [signum - 1].loop;
1377#endif
1378
1379#ifdef _WIN32 2035#ifdef _WIN32
1380 signal (signum, ev_sighandler); 2036 signal (signum, ev_sighandler);
1381#endif 2037#endif
1382 2038
1383 signals [signum - 1].pending = 1; 2039 ev_feed_signal (signum);
1384 evpipe_write (EV_A_ &sig_pending);
1385} 2040}
1386 2041
1387void noinline 2042void noinline
1388ev_feed_signal_event (EV_P_ int signum) 2043ev_feed_signal_event (EV_P_ int signum) EV_THROW
1389{ 2044{
1390 WL w; 2045 WL w;
1391 2046
1392 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2047 if (expect_false (signum <= 0 || signum > EV_NSIG))
1393 return; 2048 return;
1401 if (expect_false (signals [signum].loop != EV_A)) 2056 if (expect_false (signals [signum].loop != EV_A))
1402 return; 2057 return;
1403#endif 2058#endif
1404 2059
1405 signals [signum].pending = 0; 2060 signals [signum].pending = 0;
2061 ECB_MEMORY_FENCE_RELEASE;
1406 2062
1407 for (w = signals [signum].head; w; w = w->next) 2063 for (w = signals [signum].head; w; w = w->next)
1408 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2064 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1409} 2065}
1410 2066
1489 2145
1490#endif 2146#endif
1491 2147
1492/*****************************************************************************/ 2148/*****************************************************************************/
1493 2149
2150#if EV_USE_IOCP
2151# include "ev_iocp.c"
2152#endif
1494#if EV_USE_PORT 2153#if EV_USE_PORT
1495# include "ev_port.c" 2154# include "ev_port.c"
1496#endif 2155#endif
1497#if EV_USE_KQUEUE 2156#if EV_USE_KQUEUE
1498# include "ev_kqueue.c" 2157# include "ev_kqueue.c"
1505#endif 2164#endif
1506#if EV_USE_SELECT 2165#if EV_USE_SELECT
1507# include "ev_select.c" 2166# include "ev_select.c"
1508#endif 2167#endif
1509 2168
1510int 2169int ecb_cold
1511ev_version_major (void) 2170ev_version_major (void) EV_THROW
1512{ 2171{
1513 return EV_VERSION_MAJOR; 2172 return EV_VERSION_MAJOR;
1514} 2173}
1515 2174
1516int 2175int ecb_cold
1517ev_version_minor (void) 2176ev_version_minor (void) EV_THROW
1518{ 2177{
1519 return EV_VERSION_MINOR; 2178 return EV_VERSION_MINOR;
1520} 2179}
1521 2180
1522/* return true if we are running with elevated privileges and should ignore env variables */ 2181/* return true if we are running with elevated privileges and should ignore env variables */
1523int inline_size 2182int inline_size ecb_cold
1524enable_secure (void) 2183enable_secure (void)
1525{ 2184{
1526#ifdef _WIN32 2185#ifdef _WIN32
1527 return 0; 2186 return 0;
1528#else 2187#else
1529 return getuid () != geteuid () 2188 return getuid () != geteuid ()
1530 || getgid () != getegid (); 2189 || getgid () != getegid ();
1531#endif 2190#endif
1532} 2191}
1533 2192
1534unsigned int 2193unsigned int ecb_cold
1535ev_supported_backends (void) 2194ev_supported_backends (void) EV_THROW
1536{ 2195{
1537 unsigned int flags = 0; 2196 unsigned int flags = 0;
1538 2197
1539 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2198 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1540 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2199 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1543 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2202 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1544 2203
1545 return flags; 2204 return flags;
1546} 2205}
1547 2206
1548unsigned int 2207unsigned int ecb_cold
1549ev_recommended_backends (void) 2208ev_recommended_backends (void) EV_THROW
1550{ 2209{
1551 unsigned int flags = ev_supported_backends (); 2210 unsigned int flags = ev_supported_backends ();
1552 2211
1553#ifndef __NetBSD__ 2212#ifndef __NetBSD__
1554 /* kqueue is borked on everything but netbsd apparently */ 2213 /* kqueue is borked on everything but netbsd apparently */
1565#endif 2224#endif
1566 2225
1567 return flags; 2226 return flags;
1568} 2227}
1569 2228
1570unsigned int 2229unsigned int ecb_cold
1571ev_embeddable_backends (void) 2230ev_embeddable_backends (void) EV_THROW
1572{ 2231{
1573 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2232 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1574 2233
1575 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2234 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1576 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ 2235 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1578 2237
1579 return flags; 2238 return flags;
1580} 2239}
1581 2240
1582unsigned int 2241unsigned int
1583ev_backend (EV_P) 2242ev_backend (EV_P) EV_THROW
1584{ 2243{
1585 return backend; 2244 return backend;
1586} 2245}
1587 2246
1588#if EV_FEATURE_API 2247#if EV_FEATURE_API
1589unsigned int 2248unsigned int
1590ev_iteration (EV_P) 2249ev_iteration (EV_P) EV_THROW
1591{ 2250{
1592 return loop_count; 2251 return loop_count;
1593} 2252}
1594 2253
1595unsigned int 2254unsigned int
1596ev_depth (EV_P) 2255ev_depth (EV_P) EV_THROW
1597{ 2256{
1598 return loop_depth; 2257 return loop_depth;
1599} 2258}
1600 2259
1601void 2260void
1602ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2261ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1603{ 2262{
1604 io_blocktime = interval; 2263 io_blocktime = interval;
1605} 2264}
1606 2265
1607void 2266void
1608ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2267ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1609{ 2268{
1610 timeout_blocktime = interval; 2269 timeout_blocktime = interval;
1611} 2270}
1612 2271
1613void 2272void
1614ev_set_userdata (EV_P_ void *data) 2273ev_set_userdata (EV_P_ void *data) EV_THROW
1615{ 2274{
1616 userdata = data; 2275 userdata = data;
1617} 2276}
1618 2277
1619void * 2278void *
1620ev_userdata (EV_P) 2279ev_userdata (EV_P) EV_THROW
1621{ 2280{
1622 return userdata; 2281 return userdata;
1623} 2282}
1624 2283
2284void
1625void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2285ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
1626{ 2286{
1627 invoke_cb = invoke_pending_cb; 2287 invoke_cb = invoke_pending_cb;
1628} 2288}
1629 2289
2290void
1630void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2291ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
1631{ 2292{
1632 release_cb = release; 2293 release_cb = release;
1633 acquire_cb = acquire; 2294 acquire_cb = acquire;
1634} 2295}
1635#endif 2296#endif
1636 2297
1637/* initialise a loop structure, must be zero-initialised */ 2298/* initialise a loop structure, must be zero-initialised */
1638static void noinline 2299static void noinline ecb_cold
1639loop_init (EV_P_ unsigned int flags) 2300loop_init (EV_P_ unsigned int flags) EV_THROW
1640{ 2301{
1641 if (!backend) 2302 if (!backend)
1642 { 2303 {
2304 origflags = flags;
2305
1643#if EV_USE_REALTIME 2306#if EV_USE_REALTIME
1644 if (!have_realtime) 2307 if (!have_realtime)
1645 { 2308 {
1646 struct timespec ts; 2309 struct timespec ts;
1647 2310
1669 if (!(flags & EVFLAG_NOENV) 2332 if (!(flags & EVFLAG_NOENV)
1670 && !enable_secure () 2333 && !enable_secure ()
1671 && getenv ("LIBEV_FLAGS")) 2334 && getenv ("LIBEV_FLAGS"))
1672 flags = atoi (getenv ("LIBEV_FLAGS")); 2335 flags = atoi (getenv ("LIBEV_FLAGS"));
1673 2336
1674 ev_rt_now = ev_time (); 2337 ev_rt_now = ev_time ();
1675 mn_now = get_clock (); 2338 mn_now = get_clock ();
1676 now_floor = mn_now; 2339 now_floor = mn_now;
1677 rtmn_diff = ev_rt_now - mn_now; 2340 rtmn_diff = ev_rt_now - mn_now;
1678#if EV_FEATURE_API 2341#if EV_FEATURE_API
1679 invoke_cb = ev_invoke_pending; 2342 invoke_cb = ev_invoke_pending;
1680#endif 2343#endif
1681 2344
1682 io_blocktime = 0.; 2345 io_blocktime = 0.;
1683 timeout_blocktime = 0.; 2346 timeout_blocktime = 0.;
1684 backend = 0; 2347 backend = 0;
1685 backend_fd = -1; 2348 backend_fd = -1;
1686 sig_pending = 0; 2349 sig_pending = 0;
1687#if EV_ASYNC_ENABLE 2350#if EV_ASYNC_ENABLE
1688 async_pending = 0; 2351 async_pending = 0;
1689#endif 2352#endif
2353 pipe_write_skipped = 0;
2354 pipe_write_wanted = 0;
1690#if EV_USE_INOTIFY 2355#if EV_USE_INOTIFY
1691 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2356 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1692#endif 2357#endif
1693#if EV_USE_SIGNALFD 2358#if EV_USE_SIGNALFD
1694 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2359 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1695#endif 2360#endif
1696 2361
1697 if (!(flags & 0x0000ffffU)) 2362 if (!(flags & EVBACKEND_MASK))
1698 flags |= ev_recommended_backends (); 2363 flags |= ev_recommended_backends ();
1699 2364
2365#if EV_USE_IOCP
2366 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2367#endif
1700#if EV_USE_PORT 2368#if EV_USE_PORT
1701 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2369 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1702#endif 2370#endif
1703#if EV_USE_KQUEUE 2371#if EV_USE_KQUEUE
1704 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2372 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1721#endif 2389#endif
1722 } 2390 }
1723} 2391}
1724 2392
1725/* free up a loop structure */ 2393/* free up a loop structure */
1726static void noinline 2394void ecb_cold
1727loop_destroy (EV_P) 2395ev_loop_destroy (EV_P)
1728{ 2396{
1729 int i; 2397 int i;
2398
2399#if EV_MULTIPLICITY
2400 /* mimic free (0) */
2401 if (!EV_A)
2402 return;
2403#endif
2404
2405#if EV_CLEANUP_ENABLE
2406 /* queue cleanup watchers (and execute them) */
2407 if (expect_false (cleanupcnt))
2408 {
2409 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2410 EV_INVOKE_PENDING;
2411 }
2412#endif
2413
2414#if EV_CHILD_ENABLE
2415 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2416 {
2417 ev_ref (EV_A); /* child watcher */
2418 ev_signal_stop (EV_A_ &childev);
2419 }
2420#endif
1730 2421
1731 if (ev_is_active (&pipe_w)) 2422 if (ev_is_active (&pipe_w))
1732 { 2423 {
1733 /*ev_ref (EV_A);*/ 2424 /*ev_ref (EV_A);*/
1734 /*ev_io_stop (EV_A_ &pipe_w);*/ 2425 /*ev_io_stop (EV_A_ &pipe_w);*/
1756#endif 2447#endif
1757 2448
1758 if (backend_fd >= 0) 2449 if (backend_fd >= 0)
1759 close (backend_fd); 2450 close (backend_fd);
1760 2451
2452#if EV_USE_IOCP
2453 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2454#endif
1761#if EV_USE_PORT 2455#if EV_USE_PORT
1762 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2456 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1763#endif 2457#endif
1764#if EV_USE_KQUEUE 2458#if EV_USE_KQUEUE
1765 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2459 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1792 array_free (periodic, EMPTY); 2486 array_free (periodic, EMPTY);
1793#endif 2487#endif
1794#if EV_FORK_ENABLE 2488#if EV_FORK_ENABLE
1795 array_free (fork, EMPTY); 2489 array_free (fork, EMPTY);
1796#endif 2490#endif
2491#if EV_CLEANUP_ENABLE
2492 array_free (cleanup, EMPTY);
2493#endif
1797 array_free (prepare, EMPTY); 2494 array_free (prepare, EMPTY);
1798 array_free (check, EMPTY); 2495 array_free (check, EMPTY);
1799#if EV_ASYNC_ENABLE 2496#if EV_ASYNC_ENABLE
1800 array_free (async, EMPTY); 2497 array_free (async, EMPTY);
1801#endif 2498#endif
1802 2499
1803 backend = 0; 2500 backend = 0;
2501
2502#if EV_MULTIPLICITY
2503 if (ev_is_default_loop (EV_A))
2504#endif
2505 ev_default_loop_ptr = 0;
2506#if EV_MULTIPLICITY
2507 else
2508 ev_free (EV_A);
2509#endif
1804} 2510}
1805 2511
1806#if EV_USE_INOTIFY 2512#if EV_USE_INOTIFY
1807inline_size void infy_fork (EV_P); 2513inline_size void infy_fork (EV_P);
1808#endif 2514#endif
1823 infy_fork (EV_A); 2529 infy_fork (EV_A);
1824#endif 2530#endif
1825 2531
1826 if (ev_is_active (&pipe_w)) 2532 if (ev_is_active (&pipe_w))
1827 { 2533 {
1828 /* this "locks" the handlers against writing to the pipe */ 2534 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1829 /* while we modify the fd vars */
1830 sig_pending = 1;
1831#if EV_ASYNC_ENABLE
1832 async_pending = 1;
1833#endif
1834 2535
1835 ev_ref (EV_A); 2536 ev_ref (EV_A);
1836 ev_io_stop (EV_A_ &pipe_w); 2537 ev_io_stop (EV_A_ &pipe_w);
1837 2538
1838#if EV_USE_EVENTFD 2539#if EV_USE_EVENTFD
1856 postfork = 0; 2557 postfork = 0;
1857} 2558}
1858 2559
1859#if EV_MULTIPLICITY 2560#if EV_MULTIPLICITY
1860 2561
1861struct ev_loop * 2562struct ev_loop * ecb_cold
1862ev_loop_new (unsigned int flags) 2563ev_loop_new (unsigned int flags) EV_THROW
1863{ 2564{
1864 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2565 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1865 2566
1866 memset (EV_A, 0, sizeof (struct ev_loop)); 2567 memset (EV_A, 0, sizeof (struct ev_loop));
1867 loop_init (EV_A_ flags); 2568 loop_init (EV_A_ flags);
1868 2569
1869 if (ev_backend (EV_A)) 2570 if (ev_backend (EV_A))
1870 return EV_A; 2571 return EV_A;
1871 2572
2573 ev_free (EV_A);
1872 return 0; 2574 return 0;
1873} 2575}
1874 2576
1875void
1876ev_loop_destroy (EV_P)
1877{
1878 loop_destroy (EV_A);
1879 ev_free (loop);
1880}
1881
1882void
1883ev_loop_fork (EV_P)
1884{
1885 postfork = 1; /* must be in line with ev_default_fork */
1886}
1887#endif /* multiplicity */ 2577#endif /* multiplicity */
1888 2578
1889#if EV_VERIFY 2579#if EV_VERIFY
1890static void noinline 2580static void noinline ecb_cold
1891verify_watcher (EV_P_ W w) 2581verify_watcher (EV_P_ W w)
1892{ 2582{
1893 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2583 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1894 2584
1895 if (w->pending) 2585 if (w->pending)
1896 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2586 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1897} 2587}
1898 2588
1899static void noinline 2589static void noinline ecb_cold
1900verify_heap (EV_P_ ANHE *heap, int N) 2590verify_heap (EV_P_ ANHE *heap, int N)
1901{ 2591{
1902 int i; 2592 int i;
1903 2593
1904 for (i = HEAP0; i < N + HEAP0; ++i) 2594 for (i = HEAP0; i < N + HEAP0; ++i)
1909 2599
1910 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2600 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1911 } 2601 }
1912} 2602}
1913 2603
1914static void noinline 2604static void noinline ecb_cold
1915array_verify (EV_P_ W *ws, int cnt) 2605array_verify (EV_P_ W *ws, int cnt)
1916{ 2606{
1917 while (cnt--) 2607 while (cnt--)
1918 { 2608 {
1919 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2609 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1921 } 2611 }
1922} 2612}
1923#endif 2613#endif
1924 2614
1925#if EV_FEATURE_API 2615#if EV_FEATURE_API
1926void 2616void ecb_cold
1927ev_verify (EV_P) 2617ev_verify (EV_P) EV_THROW
1928{ 2618{
1929#if EV_VERIFY 2619#if EV_VERIFY
1930 int i; 2620 int i;
1931 WL w; 2621 WL w, w2;
1932 2622
1933 assert (activecnt >= -1); 2623 assert (activecnt >= -1);
1934 2624
1935 assert (fdchangemax >= fdchangecnt); 2625 assert (fdchangemax >= fdchangecnt);
1936 for (i = 0; i < fdchangecnt; ++i) 2626 for (i = 0; i < fdchangecnt; ++i)
1937 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 2627 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1938 2628
1939 assert (anfdmax >= 0); 2629 assert (anfdmax >= 0);
1940 for (i = 0; i < anfdmax; ++i) 2630 for (i = 0; i < anfdmax; ++i)
2631 {
2632 int j = 0;
2633
1941 for (w = anfds [i].head; w; w = w->next) 2634 for (w = w2 = anfds [i].head; w; w = w->next)
1942 { 2635 {
1943 verify_watcher (EV_A_ (W)w); 2636 verify_watcher (EV_A_ (W)w);
2637
2638 if (j++ & 1)
2639 {
2640 assert (("libev: io watcher list contains a loop", w != w2));
2641 w2 = w2->next;
2642 }
2643
1944 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 2644 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1945 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 2645 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1946 } 2646 }
2647 }
1947 2648
1948 assert (timermax >= timercnt); 2649 assert (timermax >= timercnt);
1949 verify_heap (EV_A_ timers, timercnt); 2650 verify_heap (EV_A_ timers, timercnt);
1950 2651
1951#if EV_PERIODIC_ENABLE 2652#if EV_PERIODIC_ENABLE
1966#if EV_FORK_ENABLE 2667#if EV_FORK_ENABLE
1967 assert (forkmax >= forkcnt); 2668 assert (forkmax >= forkcnt);
1968 array_verify (EV_A_ (W *)forks, forkcnt); 2669 array_verify (EV_A_ (W *)forks, forkcnt);
1969#endif 2670#endif
1970 2671
2672#if EV_CLEANUP_ENABLE
2673 assert (cleanupmax >= cleanupcnt);
2674 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2675#endif
2676
1971#if EV_ASYNC_ENABLE 2677#if EV_ASYNC_ENABLE
1972 assert (asyncmax >= asynccnt); 2678 assert (asyncmax >= asynccnt);
1973 array_verify (EV_A_ (W *)asyncs, asynccnt); 2679 array_verify (EV_A_ (W *)asyncs, asynccnt);
1974#endif 2680#endif
1975 2681
1992#endif 2698#endif
1993} 2699}
1994#endif 2700#endif
1995 2701
1996#if EV_MULTIPLICITY 2702#if EV_MULTIPLICITY
1997struct ev_loop * 2703struct ev_loop * ecb_cold
1998ev_default_loop_init (unsigned int flags)
1999#else 2704#else
2000int 2705int
2706#endif
2001ev_default_loop (unsigned int flags) 2707ev_default_loop (unsigned int flags) EV_THROW
2002#endif
2003{ 2708{
2004 if (!ev_default_loop_ptr) 2709 if (!ev_default_loop_ptr)
2005 { 2710 {
2006#if EV_MULTIPLICITY 2711#if EV_MULTIPLICITY
2007 EV_P = ev_default_loop_ptr = &default_loop_struct; 2712 EV_P = ev_default_loop_ptr = &default_loop_struct;
2026 2731
2027 return ev_default_loop_ptr; 2732 return ev_default_loop_ptr;
2028} 2733}
2029 2734
2030void 2735void
2031ev_default_destroy (void) 2736ev_loop_fork (EV_P) EV_THROW
2032{ 2737{
2033#if EV_MULTIPLICITY 2738 postfork = 1;
2034 EV_P = ev_default_loop_ptr;
2035#endif
2036
2037 ev_default_loop_ptr = 0;
2038
2039#if EV_CHILD_ENABLE
2040 ev_ref (EV_A); /* child watcher */
2041 ev_signal_stop (EV_A_ &childev);
2042#endif
2043
2044 loop_destroy (EV_A);
2045}
2046
2047void
2048ev_default_fork (void)
2049{
2050#if EV_MULTIPLICITY
2051 EV_P = ev_default_loop_ptr;
2052#endif
2053
2054 postfork = 1; /* must be in line with ev_loop_fork */
2055} 2739}
2056 2740
2057/*****************************************************************************/ 2741/*****************************************************************************/
2058 2742
2059void 2743void
2061{ 2745{
2062 EV_CB_INVOKE ((W)w, revents); 2746 EV_CB_INVOKE ((W)w, revents);
2063} 2747}
2064 2748
2065unsigned int 2749unsigned int
2066ev_pending_count (EV_P) 2750ev_pending_count (EV_P) EV_THROW
2067{ 2751{
2068 int pri; 2752 int pri;
2069 unsigned int count = 0; 2753 unsigned int count = 0;
2070 2754
2071 for (pri = NUMPRI; pri--; ) 2755 for (pri = NUMPRI; pri--; )
2075} 2759}
2076 2760
2077void noinline 2761void noinline
2078ev_invoke_pending (EV_P) 2762ev_invoke_pending (EV_P)
2079{ 2763{
2080 int pri; 2764 for (pendingpri = NUMPRI; pendingpri--; ) /* pendingpri is modified during the loop */
2081
2082 for (pri = NUMPRI; pri--; )
2083 while (pendingcnt [pri]) 2765 while (pendingcnt [pendingpri])
2084 { 2766 {
2085 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2767 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2086
2087 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2088 /* ^ this is no longer true, as pending_w could be here */
2089 2768
2090 p->w->pending = 0; 2769 p->w->pending = 0;
2091 EV_CB_INVOKE (p->w, p->events); 2770 EV_CB_INVOKE (p->w, p->events);
2092 EV_FREQUENT_CHECK; 2771 EV_FREQUENT_CHECK;
2093 } 2772 }
2155 feed_reverse_done (EV_A_ EV_TIMER); 2834 feed_reverse_done (EV_A_ EV_TIMER);
2156 } 2835 }
2157} 2836}
2158 2837
2159#if EV_PERIODIC_ENABLE 2838#if EV_PERIODIC_ENABLE
2839
2840static void noinline
2841periodic_recalc (EV_P_ ev_periodic *w)
2842{
2843 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2844 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2845
2846 /* the above almost always errs on the low side */
2847 while (at <= ev_rt_now)
2848 {
2849 ev_tstamp nat = at + w->interval;
2850
2851 /* when resolution fails us, we use ev_rt_now */
2852 if (expect_false (nat == at))
2853 {
2854 at = ev_rt_now;
2855 break;
2856 }
2857
2858 at = nat;
2859 }
2860
2861 ev_at (w) = at;
2862}
2863
2160/* make periodics pending */ 2864/* make periodics pending */
2161inline_size void 2865inline_size void
2162periodics_reify (EV_P) 2866periodics_reify (EV_P)
2163{ 2867{
2164 EV_FREQUENT_CHECK; 2868 EV_FREQUENT_CHECK;
2165 2869
2166 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 2870 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2167 { 2871 {
2168 int feed_count = 0;
2169
2170 do 2872 do
2171 { 2873 {
2172 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 2874 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2173 2875
2174 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 2876 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2183 ANHE_at_cache (periodics [HEAP0]); 2885 ANHE_at_cache (periodics [HEAP0]);
2184 downheap (periodics, periodiccnt, HEAP0); 2886 downheap (periodics, periodiccnt, HEAP0);
2185 } 2887 }
2186 else if (w->interval) 2888 else if (w->interval)
2187 { 2889 {
2188 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2890 periodic_recalc (EV_A_ w);
2189 /* if next trigger time is not sufficiently in the future, put it there */
2190 /* this might happen because of floating point inexactness */
2191 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2192 {
2193 ev_at (w) += w->interval;
2194
2195 /* if interval is unreasonably low we might still have a time in the past */
2196 /* so correct this. this will make the periodic very inexact, but the user */
2197 /* has effectively asked to get triggered more often than possible */
2198 if (ev_at (w) < ev_rt_now)
2199 ev_at (w) = ev_rt_now;
2200 }
2201
2202 ANHE_at_cache (periodics [HEAP0]); 2891 ANHE_at_cache (periodics [HEAP0]);
2203 downheap (periodics, periodiccnt, HEAP0); 2892 downheap (periodics, periodiccnt, HEAP0);
2204 } 2893 }
2205 else 2894 else
2206 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 2895 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2214 } 2903 }
2215} 2904}
2216 2905
2217/* simply recalculate all periodics */ 2906/* simply recalculate all periodics */
2218/* TODO: maybe ensure that at least one event happens when jumping forward? */ 2907/* TODO: maybe ensure that at least one event happens when jumping forward? */
2219static void noinline 2908static void noinline ecb_cold
2220periodics_reschedule (EV_P) 2909periodics_reschedule (EV_P)
2221{ 2910{
2222 int i; 2911 int i;
2223 2912
2224 /* adjust periodics after time jump */ 2913 /* adjust periodics after time jump */
2227 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 2916 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2228 2917
2229 if (w->reschedule_cb) 2918 if (w->reschedule_cb)
2230 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2919 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2231 else if (w->interval) 2920 else if (w->interval)
2232 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2921 periodic_recalc (EV_A_ w);
2233 2922
2234 ANHE_at_cache (periodics [i]); 2923 ANHE_at_cache (periodics [i]);
2235 } 2924 }
2236 2925
2237 reheap (periodics, periodiccnt); 2926 reheap (periodics, periodiccnt);
2238} 2927}
2239#endif 2928#endif
2240 2929
2241/* adjust all timers by a given offset */ 2930/* adjust all timers by a given offset */
2242static void noinline 2931static void noinline ecb_cold
2243timers_reschedule (EV_P_ ev_tstamp adjust) 2932timers_reschedule (EV_P_ ev_tstamp adjust)
2244{ 2933{
2245 int i; 2934 int i;
2246 2935
2247 for (i = 0; i < timercnt; ++i) 2936 for (i = 0; i < timercnt; ++i)
2284 * doesn't hurt either as we only do this on time-jumps or 2973 * doesn't hurt either as we only do this on time-jumps or
2285 * in the unlikely event of having been preempted here. 2974 * in the unlikely event of having been preempted here.
2286 */ 2975 */
2287 for (i = 4; --i; ) 2976 for (i = 4; --i; )
2288 { 2977 {
2978 ev_tstamp diff;
2289 rtmn_diff = ev_rt_now - mn_now; 2979 rtmn_diff = ev_rt_now - mn_now;
2290 2980
2981 diff = odiff - rtmn_diff;
2982
2291 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 2983 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2292 return; /* all is well */ 2984 return; /* all is well */
2293 2985
2294 ev_rt_now = ev_time (); 2986 ev_rt_now = ev_time ();
2295 mn_now = get_clock (); 2987 mn_now = get_clock ();
2296 now_floor = mn_now; 2988 now_floor = mn_now;
2318 3010
2319 mn_now = ev_rt_now; 3011 mn_now = ev_rt_now;
2320 } 3012 }
2321} 3013}
2322 3014
2323void 3015int
2324ev_run (EV_P_ int flags) 3016ev_run (EV_P_ int flags)
2325{ 3017{
2326#if EV_FEATURE_API 3018#if EV_FEATURE_API
2327 ++loop_depth; 3019 ++loop_depth;
2328#endif 3020#endif
2386 ev_tstamp prev_mn_now = mn_now; 3078 ev_tstamp prev_mn_now = mn_now;
2387 3079
2388 /* update time to cancel out callback processing overhead */ 3080 /* update time to cancel out callback processing overhead */
2389 time_update (EV_A_ 1e100); 3081 time_update (EV_A_ 1e100);
2390 3082
3083 /* from now on, we want a pipe-wake-up */
3084 pipe_write_wanted = 1;
3085
3086 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3087
2391 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3088 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2392 { 3089 {
2393 waittime = MAX_BLOCKTIME; 3090 waittime = MAX_BLOCKTIME;
2394 3091
2395 if (timercnt) 3092 if (timercnt)
2396 { 3093 {
2397 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3094 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2398 if (waittime > to) waittime = to; 3095 if (waittime > to) waittime = to;
2399 } 3096 }
2400 3097
2401#if EV_PERIODIC_ENABLE 3098#if EV_PERIODIC_ENABLE
2402 if (periodiccnt) 3099 if (periodiccnt)
2403 { 3100 {
2404 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3101 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2405 if (waittime > to) waittime = to; 3102 if (waittime > to) waittime = to;
2406 } 3103 }
2407#endif 3104#endif
2408 3105
2409 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3106 /* don't let timeouts decrease the waittime below timeout_blocktime */
2410 if (expect_false (waittime < timeout_blocktime)) 3107 if (expect_false (waittime < timeout_blocktime))
2411 waittime = timeout_blocktime; 3108 waittime = timeout_blocktime;
3109
3110 /* at this point, we NEED to wait, so we have to ensure */
3111 /* to pass a minimum nonzero value to the backend */
3112 if (expect_false (waittime < backend_mintime))
3113 waittime = backend_mintime;
2412 3114
2413 /* extra check because io_blocktime is commonly 0 */ 3115 /* extra check because io_blocktime is commonly 0 */
2414 if (expect_false (io_blocktime)) 3116 if (expect_false (io_blocktime))
2415 { 3117 {
2416 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3118 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2417 3119
2418 if (sleeptime > waittime - backend_fudge) 3120 if (sleeptime > waittime - backend_mintime)
2419 sleeptime = waittime - backend_fudge; 3121 sleeptime = waittime - backend_mintime;
2420 3122
2421 if (expect_true (sleeptime > 0.)) 3123 if (expect_true (sleeptime > 0.))
2422 { 3124 {
2423 ev_sleep (sleeptime); 3125 ev_sleep (sleeptime);
2424 waittime -= sleeptime; 3126 waittime -= sleeptime;
2431#endif 3133#endif
2432 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3134 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2433 backend_poll (EV_A_ waittime); 3135 backend_poll (EV_A_ waittime);
2434 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3136 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2435 3137
3138 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3139
3140 if (pipe_write_skipped)
3141 {
3142 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3143 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3144 }
3145
3146
2436 /* update ev_rt_now, do magic */ 3147 /* update ev_rt_now, do magic */
2437 time_update (EV_A_ waittime + sleeptime); 3148 time_update (EV_A_ waittime + sleeptime);
2438 } 3149 }
2439 3150
2440 /* queue pending timers and reschedule them */ 3151 /* queue pending timers and reschedule them */
2466 loop_done = EVBREAK_CANCEL; 3177 loop_done = EVBREAK_CANCEL;
2467 3178
2468#if EV_FEATURE_API 3179#if EV_FEATURE_API
2469 --loop_depth; 3180 --loop_depth;
2470#endif 3181#endif
3182
3183 return activecnt;
2471} 3184}
2472 3185
2473void 3186void
2474ev_break (EV_P_ int how) 3187ev_break (EV_P_ int how) EV_THROW
2475{ 3188{
2476 loop_done = how; 3189 loop_done = how;
2477} 3190}
2478 3191
2479void 3192void
2480ev_ref (EV_P) 3193ev_ref (EV_P) EV_THROW
2481{ 3194{
2482 ++activecnt; 3195 ++activecnt;
2483} 3196}
2484 3197
2485void 3198void
2486ev_unref (EV_P) 3199ev_unref (EV_P) EV_THROW
2487{ 3200{
2488 --activecnt; 3201 --activecnt;
2489} 3202}
2490 3203
2491void 3204void
2492ev_now_update (EV_P) 3205ev_now_update (EV_P) EV_THROW
2493{ 3206{
2494 time_update (EV_A_ 1e100); 3207 time_update (EV_A_ 1e100);
2495} 3208}
2496 3209
2497void 3210void
2498ev_suspend (EV_P) 3211ev_suspend (EV_P) EV_THROW
2499{ 3212{
2500 ev_now_update (EV_A); 3213 ev_now_update (EV_A);
2501} 3214}
2502 3215
2503void 3216void
2504ev_resume (EV_P) 3217ev_resume (EV_P) EV_THROW
2505{ 3218{
2506 ev_tstamp mn_prev = mn_now; 3219 ev_tstamp mn_prev = mn_now;
2507 3220
2508 ev_now_update (EV_A); 3221 ev_now_update (EV_A);
2509 timers_reschedule (EV_A_ mn_now - mn_prev); 3222 timers_reschedule (EV_A_ mn_now - mn_prev);
2548 w->pending = 0; 3261 w->pending = 0;
2549 } 3262 }
2550} 3263}
2551 3264
2552int 3265int
2553ev_clear_pending (EV_P_ void *w) 3266ev_clear_pending (EV_P_ void *w) EV_THROW
2554{ 3267{
2555 W w_ = (W)w; 3268 W w_ = (W)w;
2556 int pending = w_->pending; 3269 int pending = w_->pending;
2557 3270
2558 if (expect_true (pending)) 3271 if (expect_true (pending))
2591} 3304}
2592 3305
2593/*****************************************************************************/ 3306/*****************************************************************************/
2594 3307
2595void noinline 3308void noinline
2596ev_io_start (EV_P_ ev_io *w) 3309ev_io_start (EV_P_ ev_io *w) EV_THROW
2597{ 3310{
2598 int fd = w->fd; 3311 int fd = w->fd;
2599 3312
2600 if (expect_false (ev_is_active (w))) 3313 if (expect_false (ev_is_active (w)))
2601 return; 3314 return;
2607 3320
2608 ev_start (EV_A_ (W)w, 1); 3321 ev_start (EV_A_ (W)w, 1);
2609 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3322 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2610 wlist_add (&anfds[fd].head, (WL)w); 3323 wlist_add (&anfds[fd].head, (WL)w);
2611 3324
3325 /* common bug, apparently */
3326 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3327
2612 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3328 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2613 w->events &= ~EV__IOFDSET; 3329 w->events &= ~EV__IOFDSET;
2614 3330
2615 EV_FREQUENT_CHECK; 3331 EV_FREQUENT_CHECK;
2616} 3332}
2617 3333
2618void noinline 3334void noinline
2619ev_io_stop (EV_P_ ev_io *w) 3335ev_io_stop (EV_P_ ev_io *w) EV_THROW
2620{ 3336{
2621 clear_pending (EV_A_ (W)w); 3337 clear_pending (EV_A_ (W)w);
2622 if (expect_false (!ev_is_active (w))) 3338 if (expect_false (!ev_is_active (w)))
2623 return; 3339 return;
2624 3340
2633 3349
2634 EV_FREQUENT_CHECK; 3350 EV_FREQUENT_CHECK;
2635} 3351}
2636 3352
2637void noinline 3353void noinline
2638ev_timer_start (EV_P_ ev_timer *w) 3354ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2639{ 3355{
2640 if (expect_false (ev_is_active (w))) 3356 if (expect_false (ev_is_active (w)))
2641 return; 3357 return;
2642 3358
2643 ev_at (w) += mn_now; 3359 ev_at (w) += mn_now;
2657 3373
2658 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3374 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2659} 3375}
2660 3376
2661void noinline 3377void noinline
2662ev_timer_stop (EV_P_ ev_timer *w) 3378ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2663{ 3379{
2664 clear_pending (EV_A_ (W)w); 3380 clear_pending (EV_A_ (W)w);
2665 if (expect_false (!ev_is_active (w))) 3381 if (expect_false (!ev_is_active (w)))
2666 return; 3382 return;
2667 3383
2687 3403
2688 EV_FREQUENT_CHECK; 3404 EV_FREQUENT_CHECK;
2689} 3405}
2690 3406
2691void noinline 3407void noinline
2692ev_timer_again (EV_P_ ev_timer *w) 3408ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2693{ 3409{
2694 EV_FREQUENT_CHECK; 3410 EV_FREQUENT_CHECK;
3411
3412 clear_pending (EV_A_ (W)w);
2695 3413
2696 if (ev_is_active (w)) 3414 if (ev_is_active (w))
2697 { 3415 {
2698 if (w->repeat) 3416 if (w->repeat)
2699 { 3417 {
2712 3430
2713 EV_FREQUENT_CHECK; 3431 EV_FREQUENT_CHECK;
2714} 3432}
2715 3433
2716ev_tstamp 3434ev_tstamp
2717ev_timer_remaining (EV_P_ ev_timer *w) 3435ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
2718{ 3436{
2719 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 3437 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2720} 3438}
2721 3439
2722#if EV_PERIODIC_ENABLE 3440#if EV_PERIODIC_ENABLE
2723void noinline 3441void noinline
2724ev_periodic_start (EV_P_ ev_periodic *w) 3442ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2725{ 3443{
2726 if (expect_false (ev_is_active (w))) 3444 if (expect_false (ev_is_active (w)))
2727 return; 3445 return;
2728 3446
2729 if (w->reschedule_cb) 3447 if (w->reschedule_cb)
2730 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3448 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2731 else if (w->interval) 3449 else if (w->interval)
2732 { 3450 {
2733 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 3451 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2734 /* this formula differs from the one in periodic_reify because we do not always round up */ 3452 periodic_recalc (EV_A_ w);
2735 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2736 } 3453 }
2737 else 3454 else
2738 ev_at (w) = w->offset; 3455 ev_at (w) = w->offset;
2739 3456
2740 EV_FREQUENT_CHECK; 3457 EV_FREQUENT_CHECK;
2750 3467
2751 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3468 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2752} 3469}
2753 3470
2754void noinline 3471void noinline
2755ev_periodic_stop (EV_P_ ev_periodic *w) 3472ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2756{ 3473{
2757 clear_pending (EV_A_ (W)w); 3474 clear_pending (EV_A_ (W)w);
2758 if (expect_false (!ev_is_active (w))) 3475 if (expect_false (!ev_is_active (w)))
2759 return; 3476 return;
2760 3477
2778 3495
2779 EV_FREQUENT_CHECK; 3496 EV_FREQUENT_CHECK;
2780} 3497}
2781 3498
2782void noinline 3499void noinline
2783ev_periodic_again (EV_P_ ev_periodic *w) 3500ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2784{ 3501{
2785 /* TODO: use adjustheap and recalculation */ 3502 /* TODO: use adjustheap and recalculation */
2786 ev_periodic_stop (EV_A_ w); 3503 ev_periodic_stop (EV_A_ w);
2787 ev_periodic_start (EV_A_ w); 3504 ev_periodic_start (EV_A_ w);
2788} 3505}
2793#endif 3510#endif
2794 3511
2795#if EV_SIGNAL_ENABLE 3512#if EV_SIGNAL_ENABLE
2796 3513
2797void noinline 3514void noinline
2798ev_signal_start (EV_P_ ev_signal *w) 3515ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2799{ 3516{
2800 if (expect_false (ev_is_active (w))) 3517 if (expect_false (ev_is_active (w)))
2801 return; 3518 return;
2802 3519
2803 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 3520 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2861 sa.sa_handler = ev_sighandler; 3578 sa.sa_handler = ev_sighandler;
2862 sigfillset (&sa.sa_mask); 3579 sigfillset (&sa.sa_mask);
2863 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3580 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2864 sigaction (w->signum, &sa, 0); 3581 sigaction (w->signum, &sa, 0);
2865 3582
3583 if (origflags & EVFLAG_NOSIGMASK)
3584 {
2866 sigemptyset (&sa.sa_mask); 3585 sigemptyset (&sa.sa_mask);
2867 sigaddset (&sa.sa_mask, w->signum); 3586 sigaddset (&sa.sa_mask, w->signum);
2868 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 3587 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3588 }
2869#endif 3589#endif
2870 } 3590 }
2871 3591
2872 EV_FREQUENT_CHECK; 3592 EV_FREQUENT_CHECK;
2873} 3593}
2874 3594
2875void noinline 3595void noinline
2876ev_signal_stop (EV_P_ ev_signal *w) 3596ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2877{ 3597{
2878 clear_pending (EV_A_ (W)w); 3598 clear_pending (EV_A_ (W)w);
2879 if (expect_false (!ev_is_active (w))) 3599 if (expect_false (!ev_is_active (w)))
2880 return; 3600 return;
2881 3601
2912#endif 3632#endif
2913 3633
2914#if EV_CHILD_ENABLE 3634#if EV_CHILD_ENABLE
2915 3635
2916void 3636void
2917ev_child_start (EV_P_ ev_child *w) 3637ev_child_start (EV_P_ ev_child *w) EV_THROW
2918{ 3638{
2919#if EV_MULTIPLICITY 3639#if EV_MULTIPLICITY
2920 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3640 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2921#endif 3641#endif
2922 if (expect_false (ev_is_active (w))) 3642 if (expect_false (ev_is_active (w)))
2929 3649
2930 EV_FREQUENT_CHECK; 3650 EV_FREQUENT_CHECK;
2931} 3651}
2932 3652
2933void 3653void
2934ev_child_stop (EV_P_ ev_child *w) 3654ev_child_stop (EV_P_ ev_child *w) EV_THROW
2935{ 3655{
2936 clear_pending (EV_A_ (W)w); 3656 clear_pending (EV_A_ (W)w);
2937 if (expect_false (!ev_is_active (w))) 3657 if (expect_false (!ev_is_active (w)))
2938 return; 3658 return;
2939 3659
3014 if (!pend || pend == path) 3734 if (!pend || pend == path)
3015 break; 3735 break;
3016 3736
3017 *pend = 0; 3737 *pend = 0;
3018 w->wd = inotify_add_watch (fs_fd, path, mask); 3738 w->wd = inotify_add_watch (fs_fd, path, mask);
3019 } 3739 }
3020 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3740 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3021 } 3741 }
3022 } 3742 }
3023 3743
3024 if (w->wd >= 0) 3744 if (w->wd >= 0)
3091 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3811 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3092 ofs += sizeof (struct inotify_event) + ev->len; 3812 ofs += sizeof (struct inotify_event) + ev->len;
3093 } 3813 }
3094} 3814}
3095 3815
3096inline_size void 3816inline_size void ecb_cold
3097ev_check_2625 (EV_P) 3817ev_check_2625 (EV_P)
3098{ 3818{
3099 /* kernels < 2.6.25 are borked 3819 /* kernels < 2.6.25 are borked
3100 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 3820 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3101 */ 3821 */
3106} 3826}
3107 3827
3108inline_size int 3828inline_size int
3109infy_newfd (void) 3829infy_newfd (void)
3110{ 3830{
3111#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 3831#if defined IN_CLOEXEC && defined IN_NONBLOCK
3112 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 3832 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3113 if (fd >= 0) 3833 if (fd >= 0)
3114 return fd; 3834 return fd;
3115#endif 3835#endif
3116 return inotify_init (); 3836 return inotify_init ();
3191#else 3911#else
3192# define EV_LSTAT(p,b) lstat (p, b) 3912# define EV_LSTAT(p,b) lstat (p, b)
3193#endif 3913#endif
3194 3914
3195void 3915void
3196ev_stat_stat (EV_P_ ev_stat *w) 3916ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3197{ 3917{
3198 if (lstat (w->path, &w->attr) < 0) 3918 if (lstat (w->path, &w->attr) < 0)
3199 w->attr.st_nlink = 0; 3919 w->attr.st_nlink = 0;
3200 else if (!w->attr.st_nlink) 3920 else if (!w->attr.st_nlink)
3201 w->attr.st_nlink = 1; 3921 w->attr.st_nlink = 1;
3240 ev_feed_event (EV_A_ w, EV_STAT); 3960 ev_feed_event (EV_A_ w, EV_STAT);
3241 } 3961 }
3242} 3962}
3243 3963
3244void 3964void
3245ev_stat_start (EV_P_ ev_stat *w) 3965ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3246{ 3966{
3247 if (expect_false (ev_is_active (w))) 3967 if (expect_false (ev_is_active (w)))
3248 return; 3968 return;
3249 3969
3250 ev_stat_stat (EV_A_ w); 3970 ev_stat_stat (EV_A_ w);
3271 3991
3272 EV_FREQUENT_CHECK; 3992 EV_FREQUENT_CHECK;
3273} 3993}
3274 3994
3275void 3995void
3276ev_stat_stop (EV_P_ ev_stat *w) 3996ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3277{ 3997{
3278 clear_pending (EV_A_ (W)w); 3998 clear_pending (EV_A_ (W)w);
3279 if (expect_false (!ev_is_active (w))) 3999 if (expect_false (!ev_is_active (w)))
3280 return; 4000 return;
3281 4001
3297} 4017}
3298#endif 4018#endif
3299 4019
3300#if EV_IDLE_ENABLE 4020#if EV_IDLE_ENABLE
3301void 4021void
3302ev_idle_start (EV_P_ ev_idle *w) 4022ev_idle_start (EV_P_ ev_idle *w) EV_THROW
3303{ 4023{
3304 if (expect_false (ev_is_active (w))) 4024 if (expect_false (ev_is_active (w)))
3305 return; 4025 return;
3306 4026
3307 pri_adjust (EV_A_ (W)w); 4027 pri_adjust (EV_A_ (W)w);
3320 4040
3321 EV_FREQUENT_CHECK; 4041 EV_FREQUENT_CHECK;
3322} 4042}
3323 4043
3324void 4044void
3325ev_idle_stop (EV_P_ ev_idle *w) 4045ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3326{ 4046{
3327 clear_pending (EV_A_ (W)w); 4047 clear_pending (EV_A_ (W)w);
3328 if (expect_false (!ev_is_active (w))) 4048 if (expect_false (!ev_is_active (w)))
3329 return; 4049 return;
3330 4050
3344} 4064}
3345#endif 4065#endif
3346 4066
3347#if EV_PREPARE_ENABLE 4067#if EV_PREPARE_ENABLE
3348void 4068void
3349ev_prepare_start (EV_P_ ev_prepare *w) 4069ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
3350{ 4070{
3351 if (expect_false (ev_is_active (w))) 4071 if (expect_false (ev_is_active (w)))
3352 return; 4072 return;
3353 4073
3354 EV_FREQUENT_CHECK; 4074 EV_FREQUENT_CHECK;
3359 4079
3360 EV_FREQUENT_CHECK; 4080 EV_FREQUENT_CHECK;
3361} 4081}
3362 4082
3363void 4083void
3364ev_prepare_stop (EV_P_ ev_prepare *w) 4084ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
3365{ 4085{
3366 clear_pending (EV_A_ (W)w); 4086 clear_pending (EV_A_ (W)w);
3367 if (expect_false (!ev_is_active (w))) 4087 if (expect_false (!ev_is_active (w)))
3368 return; 4088 return;
3369 4089
3382} 4102}
3383#endif 4103#endif
3384 4104
3385#if EV_CHECK_ENABLE 4105#if EV_CHECK_ENABLE
3386void 4106void
3387ev_check_start (EV_P_ ev_check *w) 4107ev_check_start (EV_P_ ev_check *w) EV_THROW
3388{ 4108{
3389 if (expect_false (ev_is_active (w))) 4109 if (expect_false (ev_is_active (w)))
3390 return; 4110 return;
3391 4111
3392 EV_FREQUENT_CHECK; 4112 EV_FREQUENT_CHECK;
3397 4117
3398 EV_FREQUENT_CHECK; 4118 EV_FREQUENT_CHECK;
3399} 4119}
3400 4120
3401void 4121void
3402ev_check_stop (EV_P_ ev_check *w) 4122ev_check_stop (EV_P_ ev_check *w) EV_THROW
3403{ 4123{
3404 clear_pending (EV_A_ (W)w); 4124 clear_pending (EV_A_ (W)w);
3405 if (expect_false (!ev_is_active (w))) 4125 if (expect_false (!ev_is_active (w)))
3406 return; 4126 return;
3407 4127
3420} 4140}
3421#endif 4141#endif
3422 4142
3423#if EV_EMBED_ENABLE 4143#if EV_EMBED_ENABLE
3424void noinline 4144void noinline
3425ev_embed_sweep (EV_P_ ev_embed *w) 4145ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
3426{ 4146{
3427 ev_run (w->other, EVRUN_NOWAIT); 4147 ev_run (w->other, EVRUN_NOWAIT);
3428} 4148}
3429 4149
3430static void 4150static void
3478 ev_idle_stop (EV_A_ idle); 4198 ev_idle_stop (EV_A_ idle);
3479} 4199}
3480#endif 4200#endif
3481 4201
3482void 4202void
3483ev_embed_start (EV_P_ ev_embed *w) 4203ev_embed_start (EV_P_ ev_embed *w) EV_THROW
3484{ 4204{
3485 if (expect_false (ev_is_active (w))) 4205 if (expect_false (ev_is_active (w)))
3486 return; 4206 return;
3487 4207
3488 { 4208 {
3509 4229
3510 EV_FREQUENT_CHECK; 4230 EV_FREQUENT_CHECK;
3511} 4231}
3512 4232
3513void 4233void
3514ev_embed_stop (EV_P_ ev_embed *w) 4234ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
3515{ 4235{
3516 clear_pending (EV_A_ (W)w); 4236 clear_pending (EV_A_ (W)w);
3517 if (expect_false (!ev_is_active (w))) 4237 if (expect_false (!ev_is_active (w)))
3518 return; 4238 return;
3519 4239
3529} 4249}
3530#endif 4250#endif
3531 4251
3532#if EV_FORK_ENABLE 4252#if EV_FORK_ENABLE
3533void 4253void
3534ev_fork_start (EV_P_ ev_fork *w) 4254ev_fork_start (EV_P_ ev_fork *w) EV_THROW
3535{ 4255{
3536 if (expect_false (ev_is_active (w))) 4256 if (expect_false (ev_is_active (w)))
3537 return; 4257 return;
3538 4258
3539 EV_FREQUENT_CHECK; 4259 EV_FREQUENT_CHECK;
3544 4264
3545 EV_FREQUENT_CHECK; 4265 EV_FREQUENT_CHECK;
3546} 4266}
3547 4267
3548void 4268void
3549ev_fork_stop (EV_P_ ev_fork *w) 4269ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
3550{ 4270{
3551 clear_pending (EV_A_ (W)w); 4271 clear_pending (EV_A_ (W)w);
3552 if (expect_false (!ev_is_active (w))) 4272 if (expect_false (!ev_is_active (w)))
3553 return; 4273 return;
3554 4274
3565 4285
3566 EV_FREQUENT_CHECK; 4286 EV_FREQUENT_CHECK;
3567} 4287}
3568#endif 4288#endif
3569 4289
4290#if EV_CLEANUP_ENABLE
4291void
4292ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4293{
4294 if (expect_false (ev_is_active (w)))
4295 return;
4296
4297 EV_FREQUENT_CHECK;
4298
4299 ev_start (EV_A_ (W)w, ++cleanupcnt);
4300 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4301 cleanups [cleanupcnt - 1] = w;
4302
4303 /* cleanup watchers should never keep a refcount on the loop */
4304 ev_unref (EV_A);
4305 EV_FREQUENT_CHECK;
4306}
4307
4308void
4309ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4310{
4311 clear_pending (EV_A_ (W)w);
4312 if (expect_false (!ev_is_active (w)))
4313 return;
4314
4315 EV_FREQUENT_CHECK;
4316 ev_ref (EV_A);
4317
4318 {
4319 int active = ev_active (w);
4320
4321 cleanups [active - 1] = cleanups [--cleanupcnt];
4322 ev_active (cleanups [active - 1]) = active;
4323 }
4324
4325 ev_stop (EV_A_ (W)w);
4326
4327 EV_FREQUENT_CHECK;
4328}
4329#endif
4330
3570#if EV_ASYNC_ENABLE 4331#if EV_ASYNC_ENABLE
3571void 4332void
3572ev_async_start (EV_P_ ev_async *w) 4333ev_async_start (EV_P_ ev_async *w) EV_THROW
3573{ 4334{
3574 if (expect_false (ev_is_active (w))) 4335 if (expect_false (ev_is_active (w)))
3575 return; 4336 return;
3576 4337
3577 w->sent = 0; 4338 w->sent = 0;
3586 4347
3587 EV_FREQUENT_CHECK; 4348 EV_FREQUENT_CHECK;
3588} 4349}
3589 4350
3590void 4351void
3591ev_async_stop (EV_P_ ev_async *w) 4352ev_async_stop (EV_P_ ev_async *w) EV_THROW
3592{ 4353{
3593 clear_pending (EV_A_ (W)w); 4354 clear_pending (EV_A_ (W)w);
3594 if (expect_false (!ev_is_active (w))) 4355 if (expect_false (!ev_is_active (w)))
3595 return; 4356 return;
3596 4357
3607 4368
3608 EV_FREQUENT_CHECK; 4369 EV_FREQUENT_CHECK;
3609} 4370}
3610 4371
3611void 4372void
3612ev_async_send (EV_P_ ev_async *w) 4373ev_async_send (EV_P_ ev_async *w) EV_THROW
3613{ 4374{
3614 w->sent = 1; 4375 w->sent = 1;
3615 evpipe_write (EV_A_ &async_pending); 4376 evpipe_write (EV_A_ &async_pending);
3616} 4377}
3617#endif 4378#endif
3654 4415
3655 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 4416 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3656} 4417}
3657 4418
3658void 4419void
3659ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4420ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
3660{ 4421{
3661 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4422 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3662 4423
3663 if (expect_false (!once)) 4424 if (expect_false (!once))
3664 { 4425 {
3685} 4446}
3686 4447
3687/*****************************************************************************/ 4448/*****************************************************************************/
3688 4449
3689#if EV_WALK_ENABLE 4450#if EV_WALK_ENABLE
3690void 4451void ecb_cold
3691ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4452ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
3692{ 4453{
3693 int i, j; 4454 int i, j;
3694 ev_watcher_list *wl, *wn; 4455 ev_watcher_list *wl, *wn;
3695 4456
3696 if (types & (EV_IO | EV_EMBED)) 4457 if (types & (EV_IO | EV_EMBED))
3739 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4500 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3740#endif 4501#endif
3741 4502
3742#if EV_IDLE_ENABLE 4503#if EV_IDLE_ENABLE
3743 if (types & EV_IDLE) 4504 if (types & EV_IDLE)
3744 for (j = NUMPRI; i--; ) 4505 for (j = NUMPRI; j--; )
3745 for (i = idlecnt [j]; i--; ) 4506 for (i = idlecnt [j]; i--; )
3746 cb (EV_A_ EV_IDLE, idles [j][i]); 4507 cb (EV_A_ EV_IDLE, idles [j][i]);
3747#endif 4508#endif
3748 4509
3749#if EV_FORK_ENABLE 4510#if EV_FORK_ENABLE
3802 4563
3803#if EV_MULTIPLICITY 4564#if EV_MULTIPLICITY
3804 #include "ev_wrap.h" 4565 #include "ev_wrap.h"
3805#endif 4566#endif
3806 4567
3807EV_CPP(})
3808

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