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Comparing libev/ev.c (file contents):
Revision 1.339 by root, Tue Mar 16 00:43:22 2010 UTC vs.
Revision 1.409 by root, Sat Feb 4 15:17:34 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 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,
… …
35 * and other provisions required by the GPL. If you do not delete the 35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under 36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL. 37 * either the BSD or the GPL.
38 */ 38 */
39 39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */ 40/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
47# include EV_CONFIG_H 43# include EV_CONFIG_H
48# else 44# else
49# include "config.h" 45# include "config.h"
50# endif 46# endif
47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
51 53
52# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
… …
77# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
78# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
79# endif 81# endif
80# endif 82# endif
81 83
84# if HAVE_NANOSLEEP
82# ifndef EV_USE_NANOSLEEP 85# ifndef EV_USE_NANOSLEEP
83# if HAVE_NANOSLEEP
84# define EV_USE_NANOSLEEP EV_FEATURE_OS 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
85# else 88# else
89# undef EV_USE_NANOSLEEP
86# define EV_USE_NANOSLEEP 0 90# define EV_USE_NANOSLEEP 0
91# endif
92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
94# ifndef EV_USE_SELECT
95# define EV_USE_SELECT EV_FEATURE_BACKENDS
87# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
88# endif 100# endif
89 101
102# if HAVE_POLL && HAVE_POLL_H
90# ifndef EV_USE_SELECT 103# ifndef EV_USE_POLL
91# if HAVE_SELECT && HAVE_SYS_SELECT_H
92# define EV_USE_SELECT EV_FEATURE_BACKENDS 104# define EV_USE_POLL EV_FEATURE_BACKENDS
93# else
94# define EV_USE_SELECT 0
95# endif 105# endif
96# endif
97
98# ifndef EV_USE_POLL
99# if HAVE_POLL && HAVE_POLL_H
100# define EV_USE_POLL EV_FEATURE_BACKENDS
101# else 106# else
107# undef EV_USE_POLL
102# define EV_USE_POLL 0 108# define EV_USE_POLL 0
103# endif
104# endif 109# endif
105 110
106# ifndef EV_USE_EPOLL
107# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
112# ifndef EV_USE_EPOLL
108# define EV_USE_EPOLL EV_FEATURE_BACKENDS 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
109# else
110# define EV_USE_EPOLL 0
111# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
112# endif 118# endif
113 119
114# ifndef EV_USE_KQUEUE
115# if HAVE_KQUEUE && HAVE_SYS_EVENT_H 120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
121# ifndef EV_USE_KQUEUE
116# define EV_USE_KQUEUE EV_FEATURE_BACKENDS 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
117# else
118# define EV_USE_KQUEUE 0
119# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
120# endif 127# endif
121 128
122# ifndef EV_USE_PORT
123# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
130# ifndef EV_USE_PORT
124# define EV_USE_PORT EV_FEATURE_BACKENDS 131# define EV_USE_PORT EV_FEATURE_BACKENDS
125# else
126# define EV_USE_PORT 0
127# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
128# endif 136# endif
129 137
130# ifndef EV_USE_INOTIFY
131# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
139# ifndef EV_USE_INOTIFY
132# define EV_USE_INOTIFY EV_FEATURE_OS 140# define EV_USE_INOTIFY EV_FEATURE_OS
133# else
134# define EV_USE_INOTIFY 0
135# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
136# endif 145# endif
137 146
138# ifndef EV_USE_SIGNALFD
139# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H 147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148# ifndef EV_USE_SIGNALFD
140# define EV_USE_SIGNALFD EV_FEATURE_OS 149# define EV_USE_SIGNALFD EV_FEATURE_OS
141# else
142# define EV_USE_SIGNALFD 0
143# endif 150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
144# endif 154# endif
145 155
156# if HAVE_EVENTFD
146# ifndef EV_USE_EVENTFD 157# ifndef EV_USE_EVENTFD
147# if HAVE_EVENTFD
148# define EV_USE_EVENTFD EV_FEATURE_OS 158# define EV_USE_EVENTFD EV_FEATURE_OS
149# else
150# define EV_USE_EVENTFD 0
151# endif 159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
152# endif 163# endif
153 164
154#endif 165#endif
155 166
156#include <math.h>
157#include <stdlib.h> 167#include <stdlib.h>
158#include <string.h> 168#include <string.h>
159#include <fcntl.h> 169#include <fcntl.h>
160#include <stddef.h> 170#include <stddef.h>
161 171
… …
186# ifndef EV_SELECT_IS_WINSOCKET 196# ifndef EV_SELECT_IS_WINSOCKET
187# define EV_SELECT_IS_WINSOCKET 1 197# define EV_SELECT_IS_WINSOCKET 1
188# endif 198# endif
189# undef EV_AVOID_STDIO 199# undef EV_AVOID_STDIO
190#endif 200#endif
201
202/* OS X, in its infinite idiocy, actually HARDCODES
203 * a limit of 1024 into their select. Where people have brains,
204 * OS X engineers apparently have a vacuum. Or maybe they were
205 * ordered to have a vacuum, or they do anything for money.
206 * This might help. Or not.
207 */
208#define _DARWIN_UNLIMITED_SELECT 1
191 209
192/* this block tries to deduce configuration from header-defined symbols and defaults */ 210/* this block tries to deduce configuration from header-defined symbols and defaults */
193 211
194/* try to deduce the maximum number of signals on this platform */ 212/* try to deduce the maximum number of signals on this platform */
195#if defined (EV_NSIG) 213#if defined (EV_NSIG)
… …
217/* to make it compile regardless, just remove the above line, */ 235/* to make it compile regardless, just remove the above line, */
218/* but consider reporting it, too! :) */ 236/* but consider reporting it, too! :) */
219# define EV_NSIG 65 237# define EV_NSIG 65
220#endif 238#endif
221 239
240#ifndef EV_USE_FLOOR
241# define EV_USE_FLOOR 0
242#endif
243
222#ifndef EV_USE_CLOCK_SYSCALL 244#ifndef EV_USE_CLOCK_SYSCALL
223# if __linux && __GLIBC__ >= 2 245# if __linux && __GLIBC__ >= 2
224# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 246# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
225# else 247# else
226# define EV_USE_CLOCK_SYSCALL 0 248# define EV_USE_CLOCK_SYSCALL 0
… …
361# undef EV_USE_INOTIFY 383# undef EV_USE_INOTIFY
362# define EV_USE_INOTIFY 0 384# define EV_USE_INOTIFY 0
363#endif 385#endif
364 386
365#if !EV_USE_NANOSLEEP 387#if !EV_USE_NANOSLEEP
366# ifndef _WIN32 388/* hp-ux has it in sys/time.h, which we unconditionally include above */
389# if !defined(_WIN32) && !defined(__hpux)
367# include <sys/select.h> 390# include <sys/select.h>
368# endif 391# endif
369#endif 392#endif
370 393
371#if EV_USE_INOTIFY 394#if EV_USE_INOTIFY
372# include <sys/utsname.h>
373# include <sys/statfs.h> 395# include <sys/statfs.h>
374# include <sys/inotify.h> 396# include <sys/inotify.h>
375/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 397/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
376# ifndef IN_DONT_FOLLOW 398# ifndef IN_DONT_FOLLOW
377# undef EV_USE_INOTIFY 399# undef EV_USE_INOTIFY
… …
394# define EFD_CLOEXEC O_CLOEXEC 416# define EFD_CLOEXEC O_CLOEXEC
395# else 417# else
396# define EFD_CLOEXEC 02000000 418# define EFD_CLOEXEC 02000000
397# endif 419# endif
398# endif 420# endif
399# ifdef __cplusplus
400extern "C" {
401# endif
402int (eventfd) (unsigned int initval, int flags); 421EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
403# ifdef __cplusplus
404}
405# endif
406#endif 422#endif
407 423
408#if EV_USE_SIGNALFD 424#if EV_USE_SIGNALFD
409/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 425/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
410# include <stdint.h> 426# include <stdint.h>
… …
416# define SFD_CLOEXEC O_CLOEXEC 432# define SFD_CLOEXEC O_CLOEXEC
417# else 433# else
418# define SFD_CLOEXEC 02000000 434# define SFD_CLOEXEC 02000000
419# endif 435# endif
420# endif 436# endif
421# ifdef __cplusplus
422extern "C" {
423# endif
424int signalfd (int fd, const sigset_t *mask, int flags); 437EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
425 438
426struct signalfd_siginfo 439struct signalfd_siginfo
427{ 440{
428 uint32_t ssi_signo; 441 uint32_t ssi_signo;
429 char pad[128 - sizeof (uint32_t)]; 442 char pad[128 - sizeof (uint32_t)];
430}; 443};
431# ifdef __cplusplus
432}
433# endif 444#endif
434#endif
435
436 445
437/**/ 446/**/
438 447
439#if EV_VERIFY >= 3 448#if EV_VERIFY >= 3
440# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 449# define EV_FREQUENT_CHECK ev_verify (EV_A)
441#else 450#else
442# define EV_FREQUENT_CHECK do { } while (0) 451# define EV_FREQUENT_CHECK do { } while (0)
443#endif 452#endif
444 453
445/* 454/*
446 * This is used to avoid floating point rounding problems. 455 * This is used to work around floating point rounding problems.
447 * It is added to ev_rt_now when scheduling periodics
448 * to ensure progress, time-wise, even when rounding
449 * errors are against us.
450 * This value is good at least till the year 4000. 456 * This value is good at least till the year 4000.
451 * Better solutions welcome.
452 */ 457 */
453#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 458#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
459/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
454 460
455#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 461#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
456#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 462#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
457 463
464#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
465#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
466
467/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
468/* ECB.H BEGIN */
469/*
470 * libecb - http://software.schmorp.de/pkg/libecb
471 *
472 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
473 * Copyright (©) 2011 Emanuele Giaquinta
474 * All rights reserved.
475 *
476 * Redistribution and use in source and binary forms, with or without modifica-
477 * tion, are permitted provided that the following conditions are met:
478 *
479 * 1. Redistributions of source code must retain the above copyright notice,
480 * this list of conditions and the following disclaimer.
481 *
482 * 2. Redistributions in binary form must reproduce the above copyright
483 * notice, this list of conditions and the following disclaimer in the
484 * documentation and/or other materials provided with the distribution.
485 *
486 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
487 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
488 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
489 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
490 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
491 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
492 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
493 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
494 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
495 * OF THE POSSIBILITY OF SUCH DAMAGE.
496 */
497
498#ifndef ECB_H
499#define ECB_H
500
501#ifdef _WIN32
502 typedef signed char int8_t;
503 typedef unsigned char uint8_t;
504 typedef signed short int16_t;
505 typedef unsigned short uint16_t;
506 typedef signed int int32_t;
507 typedef unsigned int uint32_t;
458#if __GNUC__ >= 4 508 #if __GNUC__
459# define expect(expr,value) __builtin_expect ((expr),(value)) 509 typedef signed long long int64_t;
460# define noinline __attribute__ ((noinline)) 510 typedef unsigned long long uint64_t;
511 #else /* _MSC_VER || __BORLANDC__ */
512 typedef signed __int64 int64_t;
513 typedef unsigned __int64 uint64_t;
514 #endif
461#else 515#else
462# define expect(expr,value) (expr) 516 #include <inttypes.h>
463# define noinline
464# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
465# define inline
466# endif 517#endif
518
519/* many compilers define _GNUC_ to some versions but then only implement
520 * what their idiot authors think are the "more important" extensions,
521 * causing enormous grief in return for some better fake benchmark numbers.
522 * or so.
523 * we try to detect these and simply assume they are not gcc - if they have
524 * an issue with that they should have done it right in the first place.
525 */
526#ifndef ECB_GCC_VERSION
527 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__)
528 #define ECB_GCC_VERSION(major,minor) 0
529 #else
530 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
467#endif 531 #endif
532#endif
468 533
534/*****************************************************************************/
535
536/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
537/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
538
539#if ECB_NO_THREADS || ECB_NO_SMP
540 #define ECB_MEMORY_FENCE do { } while (0)
541#endif
542
543#ifndef ECB_MEMORY_FENCE
544 #if ECB_GCC_VERSION(2,5) || defined(__INTEL_COMPILER) || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
545 #if __i386 || __i386__
546 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
547 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
548 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
549 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
550 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
551 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
552 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
553 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
554 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
555 #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \
556 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__)
557 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
558 #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \
559 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ )
560 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
561 #elif __sparc || __sparc__
562 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")
563 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
564 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
565 #elif defined(__s390__) || defined(__s390x__)
566 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
567 #endif
568 #endif
569#endif
570
571#ifndef ECB_MEMORY_FENCE
572 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) || defined(__clang__)
573 #define ECB_MEMORY_FENCE __sync_synchronize ()
574 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
575 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
576 #elif _MSC_VER >= 1400 /* VC++ 2005 */
577 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
578 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
579 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
580 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
581 #elif defined(_WIN32)
582 #include <WinNT.h>
583 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
584 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
585 #include <mbarrier.h>
586 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
587 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
588 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
589 #endif
590#endif
591
592#ifndef ECB_MEMORY_FENCE
593 #if !ECB_AVOID_PTHREADS
594 /*
595 * if you get undefined symbol references to pthread_mutex_lock,
596 * or failure to find pthread.h, then you should implement
597 * the ECB_MEMORY_FENCE operations for your cpu/compiler
598 * OR provide pthread.h and link against the posix thread library
599 * of your system.
600 */
601 #include <pthread.h>
602 #define ECB_NEEDS_PTHREADS 1
603 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
604
605 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
606 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
607 #endif
608#endif
609
610#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)
611 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
612#endif
613
614#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)
615 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
616#endif
617
618/*****************************************************************************/
619
620#define ECB_C99 (__STDC_VERSION__ >= 199901L)
621
622#if __cplusplus
623 #define ecb_inline static inline
624#elif ECB_GCC_VERSION(2,5)
625 #define ecb_inline static __inline__
626#elif ECB_C99
627 #define ecb_inline static inline
628#else
629 #define ecb_inline static
630#endif
631
632#if ECB_GCC_VERSION(3,3)
633 #define ecb_restrict __restrict__
634#elif ECB_C99
635 #define ecb_restrict restrict
636#else
637 #define ecb_restrict
638#endif
639
640typedef int ecb_bool;
641
642#define ECB_CONCAT_(a, b) a ## b
643#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
644#define ECB_STRINGIFY_(a) # a
645#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
646
647#define ecb_function_ ecb_inline
648
649#if ECB_GCC_VERSION(3,1)
650 #define ecb_attribute(attrlist) __attribute__(attrlist)
651 #define ecb_is_constant(expr) __builtin_constant_p (expr)
652 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
653 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
654#else
655 #define ecb_attribute(attrlist)
656 #define ecb_is_constant(expr) 0
657 #define ecb_expect(expr,value) (expr)
658 #define ecb_prefetch(addr,rw,locality)
659#endif
660
661/* no emulation for ecb_decltype */
662#if ECB_GCC_VERSION(4,5)
663 #define ecb_decltype(x) __decltype(x)
664#elif ECB_GCC_VERSION(3,0)
665 #define ecb_decltype(x) __typeof(x)
666#endif
667
668#define ecb_noinline ecb_attribute ((__noinline__))
669#define ecb_noreturn ecb_attribute ((__noreturn__))
670#define ecb_unused ecb_attribute ((__unused__))
671#define ecb_const ecb_attribute ((__const__))
672#define ecb_pure ecb_attribute ((__pure__))
673
674#if ECB_GCC_VERSION(4,3)
675 #define ecb_artificial ecb_attribute ((__artificial__))
676 #define ecb_hot ecb_attribute ((__hot__))
677 #define ecb_cold ecb_attribute ((__cold__))
678#else
679 #define ecb_artificial
680 #define ecb_hot
681 #define ecb_cold
682#endif
683
684/* put around conditional expressions if you are very sure that the */
685/* expression is mostly true or mostly false. note that these return */
686/* booleans, not the expression. */
469#define expect_false(expr) expect ((expr) != 0, 0) 687#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
470#define expect_true(expr) expect ((expr) != 0, 1) 688#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
689/* for compatibility to the rest of the world */
690#define ecb_likely(expr) ecb_expect_true (expr)
691#define ecb_unlikely(expr) ecb_expect_false (expr)
692
693/* count trailing zero bits and count # of one bits */
694#if ECB_GCC_VERSION(3,4)
695 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
696 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
697 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
698 #define ecb_ctz32(x) __builtin_ctz (x)
699 #define ecb_ctz64(x) __builtin_ctzll (x)
700 #define ecb_popcount32(x) __builtin_popcount (x)
701 /* no popcountll */
702#else
703 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
704 ecb_function_ int
705 ecb_ctz32 (uint32_t x)
706 {
707 int r = 0;
708
709 x &= ~x + 1; /* this isolates the lowest bit */
710
711#if ECB_branchless_on_i386
712 r += !!(x & 0xaaaaaaaa) << 0;
713 r += !!(x & 0xcccccccc) << 1;
714 r += !!(x & 0xf0f0f0f0) << 2;
715 r += !!(x & 0xff00ff00) << 3;
716 r += !!(x & 0xffff0000) << 4;
717#else
718 if (x & 0xaaaaaaaa) r += 1;
719 if (x & 0xcccccccc) r += 2;
720 if (x & 0xf0f0f0f0) r += 4;
721 if (x & 0xff00ff00) r += 8;
722 if (x & 0xffff0000) r += 16;
723#endif
724
725 return r;
726 }
727
728 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
729 ecb_function_ int
730 ecb_ctz64 (uint64_t x)
731 {
732 int shift = x & 0xffffffffU ? 0 : 32;
733 return ecb_ctz32 (x >> shift) + shift;
734 }
735
736 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
737 ecb_function_ int
738 ecb_popcount32 (uint32_t x)
739 {
740 x -= (x >> 1) & 0x55555555;
741 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
742 x = ((x >> 4) + x) & 0x0f0f0f0f;
743 x *= 0x01010101;
744
745 return x >> 24;
746 }
747
748 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
749 ecb_function_ int ecb_ld32 (uint32_t x)
750 {
751 int r = 0;
752
753 if (x >> 16) { x >>= 16; r += 16; }
754 if (x >> 8) { x >>= 8; r += 8; }
755 if (x >> 4) { x >>= 4; r += 4; }
756 if (x >> 2) { x >>= 2; r += 2; }
757 if (x >> 1) { r += 1; }
758
759 return r;
760 }
761
762 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
763 ecb_function_ int ecb_ld64 (uint64_t x)
764 {
765 int r = 0;
766
767 if (x >> 32) { x >>= 32; r += 32; }
768
769 return r + ecb_ld32 (x);
770 }
771#endif
772
773ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
774ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
775{
776 return ( (x * 0x0802U & 0x22110U)
777 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
778}
779
780ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
781ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
782{
783 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
784 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
785 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
786 x = ( x >> 8 ) | ( x << 8);
787
788 return x;
789}
790
791ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
792ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
793{
794 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
795 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
796 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
797 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
798 x = ( x >> 16 ) | ( x << 16);
799
800 return x;
801}
802
803/* popcount64 is only available on 64 bit cpus as gcc builtin */
804/* so for this version we are lazy */
805ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
806ecb_function_ int
807ecb_popcount64 (uint64_t x)
808{
809 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
810}
811
812ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
813ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
814ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
815ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
816ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
817ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
818ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
819ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
820
821ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
822ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
823ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
824ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
825ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
826ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
827ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
828ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
829
830#if ECB_GCC_VERSION(4,3)
831 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
832 #define ecb_bswap32(x) __builtin_bswap32 (x)
833 #define ecb_bswap64(x) __builtin_bswap64 (x)
834#else
835 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
836 ecb_function_ uint16_t
837 ecb_bswap16 (uint16_t x)
838 {
839 return ecb_rotl16 (x, 8);
840 }
841
842 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
843 ecb_function_ uint32_t
844 ecb_bswap32 (uint32_t x)
845 {
846 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
847 }
848
849 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
850 ecb_function_ uint64_t
851 ecb_bswap64 (uint64_t x)
852 {
853 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
854 }
855#endif
856
857#if ECB_GCC_VERSION(4,5)
858 #define ecb_unreachable() __builtin_unreachable ()
859#else
860 /* this seems to work fine, but gcc always emits a warning for it :/ */
861 ecb_inline void ecb_unreachable (void) ecb_noreturn;
862 ecb_inline void ecb_unreachable (void) { }
863#endif
864
865/* try to tell the compiler that some condition is definitely true */
866#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
867
868ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
869ecb_inline unsigned char
870ecb_byteorder_helper (void)
871{
872 const uint32_t u = 0x11223344;
873 return *(unsigned char *)&u;
874}
875
876ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
877ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
878ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
879ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
880
881#if ECB_GCC_VERSION(3,0) || ECB_C99
882 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
883#else
884 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
885#endif
886
887#if __cplusplus
888 template<typename T>
889 static inline T ecb_div_rd (T val, T div)
890 {
891 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
892 }
893 template<typename T>
894 static inline T ecb_div_ru (T val, T div)
895 {
896 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
897 }
898#else
899 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
900 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
901#endif
902
903#if ecb_cplusplus_does_not_suck
904 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
905 template<typename T, int N>
906 static inline int ecb_array_length (const T (&arr)[N])
907 {
908 return N;
909 }
910#else
911 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
912#endif
913
914#endif
915
916/* ECB.H END */
917
918#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
919/* if your architecture doesn't need memory fences, e.g. because it is
920 * single-cpu/core, or if you use libev in a project that doesn't use libev
921 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
922 * libev, in which cases the memory fences become nops.
923 * alternatively, you can remove this #error and link against libpthread,
924 * which will then provide the memory fences.
925 */
926# error "memory fences not defined for your architecture, please report"
927#endif
928
929#ifndef ECB_MEMORY_FENCE
930# define ECB_MEMORY_FENCE do { } while (0)
931# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
932# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
933#endif
934
935#define expect_false(cond) ecb_expect_false (cond)
936#define expect_true(cond) ecb_expect_true (cond)
937#define noinline ecb_noinline
938
471#define inline_size static inline 939#define inline_size ecb_inline
472 940
473#if EV_FEATURE_CODE 941#if EV_FEATURE_CODE
474# define inline_speed static inline 942# define inline_speed ecb_inline
475#else 943#else
476# define inline_speed static noinline 944# define inline_speed static noinline
477#endif 945#endif
478 946
479#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 947#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
… …
494#define ev_active(w) ((W)(w))->active 962#define ev_active(w) ((W)(w))->active
495#define ev_at(w) ((WT)(w))->at 963#define ev_at(w) ((WT)(w))->at
496 964
497#if EV_USE_REALTIME 965#if EV_USE_REALTIME
498/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 966/* sig_atomic_t is used to avoid per-thread variables or locking but still */
499/* giving it a reasonably high chance of working on typical architetcures */ 967/* giving it a reasonably high chance of working on typical architectures */
500static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ 968static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
501#endif 969#endif
502 970
503#if EV_USE_MONOTONIC 971#if EV_USE_MONOTONIC
504static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 972static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
… …
518# include "ev_win32.c" 986# include "ev_win32.c"
519#endif 987#endif
520 988
521/*****************************************************************************/ 989/*****************************************************************************/
522 990
991/* define a suitable floor function (only used by periodics atm) */
992
993#if EV_USE_FLOOR
994# include <math.h>
995# define ev_floor(v) floor (v)
996#else
997
998#include <float.h>
999
1000/* a floor() replacement function, should be independent of ev_tstamp type */
1001static ev_tstamp noinline
1002ev_floor (ev_tstamp v)
1003{
1004 /* the choice of shift factor is not terribly important */
1005#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1006 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1007#else
1008 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1009#endif
1010
1011 /* argument too large for an unsigned long? */
1012 if (expect_false (v >= shift))
1013 {
1014 ev_tstamp f;
1015
1016 if (v == v - 1.)
1017 return v; /* very large number */
1018
1019 f = shift * ev_floor (v * (1. / shift));
1020 return f + ev_floor (v - f);
1021 }
1022
1023 /* special treatment for negative args? */
1024 if (expect_false (v < 0.))
1025 {
1026 ev_tstamp f = -ev_floor (-v);
1027
1028 return f - (f == v ? 0 : 1);
1029 }
1030
1031 /* fits into an unsigned long */
1032 return (unsigned long)v;
1033}
1034
1035#endif
1036
1037/*****************************************************************************/
1038
1039#ifdef __linux
1040# include <sys/utsname.h>
1041#endif
1042
1043static unsigned int noinline ecb_cold
1044ev_linux_version (void)
1045{
1046#ifdef __linux
1047 unsigned int v = 0;
1048 struct utsname buf;
1049 int i;
1050 char *p = buf.release;
1051
1052 if (uname (&buf))
1053 return 0;
1054
1055 for (i = 3+1; --i; )
1056 {
1057 unsigned int c = 0;
1058
1059 for (;;)
1060 {
1061 if (*p >= '0' && *p <= '9')
1062 c = c * 10 + *p++ - '0';
1063 else
1064 {
1065 p += *p == '.';
1066 break;
1067 }
1068 }
1069
1070 v = (v << 8) | c;
1071 }
1072
1073 return v;
1074#else
1075 return 0;
1076#endif
1077}
1078
1079/*****************************************************************************/
1080
523#if EV_AVOID_STDIO 1081#if EV_AVOID_STDIO
524static void noinline 1082static void noinline ecb_cold
525ev_printerr (const char *msg) 1083ev_printerr (const char *msg)
526{ 1084{
527 write (STDERR_FILENO, msg, strlen (msg)); 1085 write (STDERR_FILENO, msg, strlen (msg));
528} 1086}
529#endif 1087#endif
530 1088
531static void (*syserr_cb)(const char *msg); 1089static void (*syserr_cb)(const char *msg);
532 1090
533void 1091void ecb_cold
534ev_set_syserr_cb (void (*cb)(const char *msg)) 1092ev_set_syserr_cb (void (*cb)(const char *msg))
535{ 1093{
536 syserr_cb = cb; 1094 syserr_cb = cb;
537} 1095}
538 1096
539static void noinline 1097static void noinline ecb_cold
540ev_syserr (const char *msg) 1098ev_syserr (const char *msg)
541{ 1099{
542 if (!msg) 1100 if (!msg)
543 msg = "(libev) system error"; 1101 msg = "(libev) system error";
544 1102
545 if (syserr_cb) 1103 if (syserr_cb)
546 syserr_cb (msg); 1104 syserr_cb (msg);
547 else 1105 else
548 { 1106 {
549#if EV_AVOID_STDIO 1107#if EV_AVOID_STDIO
550 const char *err = strerror (errno);
551
552 ev_printerr (msg); 1108 ev_printerr (msg);
553 ev_printerr (": "); 1109 ev_printerr (": ");
554 ev_printerr (err); 1110 ev_printerr (strerror (errno));
555 ev_printerr ("\n"); 1111 ev_printerr ("\n");
556#else 1112#else
557 perror (msg); 1113 perror (msg);
558#endif 1114#endif
559 abort (); 1115 abort ();
… …
579#endif 1135#endif
580} 1136}
581 1137
582static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1138static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
583 1139
584void 1140void ecb_cold
585ev_set_allocator (void *(*cb)(void *ptr, long size)) 1141ev_set_allocator (void *(*cb)(void *ptr, long size))
586{ 1142{
587 alloc = cb; 1143 alloc = cb;
588} 1144}
589 1145
… …
593 ptr = alloc (ptr, size); 1149 ptr = alloc (ptr, size);
594 1150
595 if (!ptr && size) 1151 if (!ptr && size)
596 { 1152 {
597#if EV_AVOID_STDIO 1153#if EV_AVOID_STDIO
598 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1154 ev_printerr ("(libev) memory allocation failed, aborting.\n");
599#else 1155#else
600 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1156 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
601#endif 1157#endif
602 abort (); 1158 abort ();
603 } 1159 }
604 1160
605 return ptr; 1161 return ptr;
… …
622 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1178 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
623 unsigned char unused; 1179 unsigned char unused;
624#if EV_USE_EPOLL 1180#if EV_USE_EPOLL
625 unsigned int egen; /* generation counter to counter epoll bugs */ 1181 unsigned int egen; /* generation counter to counter epoll bugs */
626#endif 1182#endif
627#if EV_SELECT_IS_WINSOCKET 1183#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
628 SOCKET handle; 1184 SOCKET handle;
1185#endif
1186#if EV_USE_IOCP
1187 OVERLAPPED or, ow;
629#endif 1188#endif
630} ANFD; 1189} ANFD;
631 1190
632/* stores the pending event set for a given watcher */ 1191/* stores the pending event set for a given watcher */
633typedef struct 1192typedef struct
… …
675 #undef VAR 1234 #undef VAR
676 }; 1235 };
677 #include "ev_wrap.h" 1236 #include "ev_wrap.h"
678 1237
679 static struct ev_loop default_loop_struct; 1238 static struct ev_loop default_loop_struct;
680 struct ev_loop *ev_default_loop_ptr; 1239 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
681 1240
682#else 1241#else
683 1242
684 ev_tstamp ev_rt_now; 1243 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
685 #define VAR(name,decl) static decl; 1244 #define VAR(name,decl) static decl;
686 #include "ev_vars.h" 1245 #include "ev_vars.h"
687 #undef VAR 1246 #undef VAR
688 1247
689 static int ev_default_loop_ptr; 1248 static int ev_default_loop_ptr;
… …
698# define EV_RELEASE_CB (void)0 1257# define EV_RELEASE_CB (void)0
699# define EV_ACQUIRE_CB (void)0 1258# define EV_ACQUIRE_CB (void)0
700# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 1259# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
701#endif 1260#endif
702 1261
703#define EVUNLOOP_RECURSE 0x80 1262#define EVBREAK_RECURSE 0x80
704 1263
705/*****************************************************************************/ 1264/*****************************************************************************/
706 1265
707#ifndef EV_HAVE_EV_TIME 1266#ifndef EV_HAVE_EV_TIME
708ev_tstamp 1267ev_tstamp
… …
752 if (delay > 0.) 1311 if (delay > 0.)
753 { 1312 {
754#if EV_USE_NANOSLEEP 1313#if EV_USE_NANOSLEEP
755 struct timespec ts; 1314 struct timespec ts;
756 1315
757 ts.tv_sec = (time_t)delay; 1316 EV_TS_SET (ts, delay);
758 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
759
760 nanosleep (&ts, 0); 1317 nanosleep (&ts, 0);
761#elif defined(_WIN32) 1318#elif defined(_WIN32)
762 Sleep ((unsigned long)(delay * 1e3)); 1319 Sleep ((unsigned long)(delay * 1e3));
763#else 1320#else
764 struct timeval tv; 1321 struct timeval tv;
765 1322
766 tv.tv_sec = (time_t)delay;
767 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
768
769 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1323 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
770 /* something not guaranteed by newer posix versions, but guaranteed */ 1324 /* something not guaranteed by newer posix versions, but guaranteed */
771 /* by older ones */ 1325 /* by older ones */
1326 EV_TV_SET (tv, delay);
772 select (0, 0, 0, 0, &tv); 1327 select (0, 0, 0, 0, &tv);
773#endif 1328#endif
774 } 1329 }
775} 1330}
776 1331
777/*****************************************************************************/ 1332/*****************************************************************************/
778 1333
779#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1334#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
780 1335
781/* find a suitable new size for the given array, */ 1336/* find a suitable new size for the given array, */
782/* hopefully by rounding to a ncie-to-malloc size */ 1337/* hopefully by rounding to a nice-to-malloc size */
783inline_size int 1338inline_size int
784array_nextsize (int elem, int cur, int cnt) 1339array_nextsize (int elem, int cur, int cnt)
785{ 1340{
786 int ncur = cur + 1; 1341 int ncur = cur + 1;
787 1342
788 do 1343 do
789 ncur <<= 1; 1344 ncur <<= 1;
790 while (cnt > ncur); 1345 while (cnt > ncur);
791 1346
792 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1347 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
793 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1348 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
794 { 1349 {
795 ncur *= elem; 1350 ncur *= elem;
796 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1351 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
797 ncur = ncur - sizeof (void *) * 4; 1352 ncur = ncur - sizeof (void *) * 4;
… …
799 } 1354 }
800 1355
801 return ncur; 1356 return ncur;
802} 1357}
803 1358
804static noinline void * 1359static void * noinline ecb_cold
805array_realloc (int elem, void *base, int *cur, int cnt) 1360array_realloc (int elem, void *base, int *cur, int cnt)
806{ 1361{
807 *cur = array_nextsize (elem, *cur, cnt); 1362 *cur = array_nextsize (elem, *cur, cnt);
808 return ev_realloc (base, elem * *cur); 1363 return ev_realloc (base, elem * *cur);
809} 1364}
… …
812 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1367 memset ((void *)(base), 0, sizeof (*(base)) * (count))
813 1368
814#define array_needsize(type,base,cur,cnt,init) \ 1369#define array_needsize(type,base,cur,cnt,init) \
815 if (expect_false ((cnt) > (cur))) \ 1370 if (expect_false ((cnt) > (cur))) \
816 { \ 1371 { \
817 int ocur_ = (cur); \ 1372 int ecb_unused ocur_ = (cur); \
818 (base) = (type *)array_realloc \ 1373 (base) = (type *)array_realloc \
819 (sizeof (type), (base), &(cur), (cnt)); \ 1374 (sizeof (type), (base), &(cur), (cnt)); \
820 init ((base) + (ocur_), (cur) - ocur_); \ 1375 init ((base) + (ocur_), (cur) - ocur_); \
821 } 1376 }
822 1377
… …
922inline_size void 1477inline_size void
923fd_reify (EV_P) 1478fd_reify (EV_P)
924{ 1479{
925 int i; 1480 int i;
926 1481
1482#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1483 for (i = 0; i < fdchangecnt; ++i)
1484 {
1485 int fd = fdchanges [i];
1486 ANFD *anfd = anfds + fd;
1487
1488 if (anfd->reify & EV__IOFDSET && anfd->head)
1489 {
1490 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1491
1492 if (handle != anfd->handle)
1493 {
1494 unsigned long arg;
1495
1496 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1497
1498 /* handle changed, but fd didn't - we need to do it in two steps */
1499 backend_modify (EV_A_ fd, anfd->events, 0);
1500 anfd->events = 0;
1501 anfd->handle = handle;
1502 }
1503 }
1504 }
1505#endif
1506
927 for (i = 0; i < fdchangecnt; ++i) 1507 for (i = 0; i < fdchangecnt; ++i)
928 { 1508 {
929 int fd = fdchanges [i]; 1509 int fd = fdchanges [i];
930 ANFD *anfd = anfds + fd; 1510 ANFD *anfd = anfds + fd;
931 ev_io *w; 1511 ev_io *w;
932 1512
933 unsigned char events = 0; 1513 unsigned char o_events = anfd->events;
1514 unsigned char o_reify = anfd->reify;
934 1515
935 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1516 anfd->reify = 0;
936 events |= (unsigned char)w->events;
937 1517
938#if EV_SELECT_IS_WINSOCKET 1518 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
939 if (events)
940 { 1519 {
941 unsigned long arg; 1520 anfd->events = 0;
942 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1521
943 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 1522 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1523 anfd->events |= (unsigned char)w->events;
1524
1525 if (o_events != anfd->events)
1526 o_reify = EV__IOFDSET; /* actually |= */
944 } 1527 }
945#endif
946 1528
947 { 1529 if (o_reify & EV__IOFDSET)
948 unsigned char o_events = anfd->events;
949 unsigned char o_reify = anfd->reify;
950
951 anfd->reify = 0;
952 anfd->events = events;
953
954 if (o_events != events || o_reify & EV__IOFDSET)
955 backend_modify (EV_A_ fd, o_events, events); 1530 backend_modify (EV_A_ fd, o_events, anfd->events);
956 }
957 } 1531 }
958 1532
959 fdchangecnt = 0; 1533 fdchangecnt = 0;
960} 1534}
961 1535
… …
973 fdchanges [fdchangecnt - 1] = fd; 1547 fdchanges [fdchangecnt - 1] = fd;
974 } 1548 }
975} 1549}
976 1550
977/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1551/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
978inline_speed void 1552inline_speed void ecb_cold
979fd_kill (EV_P_ int fd) 1553fd_kill (EV_P_ int fd)
980{ 1554{
981 ev_io *w; 1555 ev_io *w;
982 1556
983 while ((w = (ev_io *)anfds [fd].head)) 1557 while ((w = (ev_io *)anfds [fd].head))
… …
986 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1560 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
987 } 1561 }
988} 1562}
989 1563
990/* check whether the given fd is actually valid, for error recovery */ 1564/* check whether the given fd is actually valid, for error recovery */
991inline_size int 1565inline_size int ecb_cold
992fd_valid (int fd) 1566fd_valid (int fd)
993{ 1567{
994#ifdef _WIN32 1568#ifdef _WIN32
995 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1569 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
996#else 1570#else
997 return fcntl (fd, F_GETFD) != -1; 1571 return fcntl (fd, F_GETFD) != -1;
998#endif 1572#endif
999} 1573}
1000 1574
1001/* called on EBADF to verify fds */ 1575/* called on EBADF to verify fds */
1002static void noinline 1576static void noinline ecb_cold
1003fd_ebadf (EV_P) 1577fd_ebadf (EV_P)
1004{ 1578{
1005 int fd; 1579 int fd;
1006 1580
1007 for (fd = 0; fd < anfdmax; ++fd) 1581 for (fd = 0; fd < anfdmax; ++fd)
… …
1009 if (!fd_valid (fd) && errno == EBADF) 1583 if (!fd_valid (fd) && errno == EBADF)
1010 fd_kill (EV_A_ fd); 1584 fd_kill (EV_A_ fd);
1011} 1585}
1012 1586
1013/* called on ENOMEM in select/poll to kill some fds and retry */ 1587/* called on ENOMEM in select/poll to kill some fds and retry */
1014static void noinline 1588static void noinline ecb_cold
1015fd_enomem (EV_P) 1589fd_enomem (EV_P)
1016{ 1590{
1017 int fd; 1591 int fd;
1018 1592
1019 for (fd = anfdmax; fd--; ) 1593 for (fd = anfdmax; fd--; )
… …
1054} 1628}
1055 1629
1056/*****************************************************************************/ 1630/*****************************************************************************/
1057 1631
1058/* 1632/*
1059 * the heap functions want a real array index. array index 0 uis guaranteed to not 1633 * the heap functions want a real array index. array index 0 is guaranteed to not
1060 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives 1634 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1061 * the branching factor of the d-tree. 1635 * the branching factor of the d-tree.
1062 */ 1636 */
1063 1637
1064/* 1638/*
… …
1214 1788
1215/*****************************************************************************/ 1789/*****************************************************************************/
1216 1790
1217#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 1791#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1218 1792
1219static void noinline 1793static void noinline ecb_cold
1220evpipe_init (EV_P) 1794evpipe_init (EV_P)
1221{ 1795{
1222 if (!ev_is_active (&pipe_w)) 1796 if (!ev_is_active (&pipe_w))
1223 { 1797 {
1224# if EV_USE_EVENTFD 1798# if EV_USE_EVENTFD
… …
1246 ev_io_start (EV_A_ &pipe_w); 1820 ev_io_start (EV_A_ &pipe_w);
1247 ev_unref (EV_A); /* watcher should not keep loop alive */ 1821 ev_unref (EV_A); /* watcher should not keep loop alive */
1248 } 1822 }
1249} 1823}
1250 1824
1251inline_size void 1825inline_speed void
1252evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1826evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1253{ 1827{
1254 if (!*flag) 1828 if (expect_true (*flag))
1829 return;
1830
1831 *flag = 1;
1832
1833 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1834
1835 pipe_write_skipped = 1;
1836
1837 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1838
1839 if (pipe_write_wanted)
1255 { 1840 {
1841 int old_errno;
1842
1843 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1844
1256 int old_errno = errno; /* save errno because write might clobber it */ 1845 old_errno = errno; /* save errno because write will clobber it */
1257 char dummy;
1258
1259 *flag = 1;
1260 1846
1261#if EV_USE_EVENTFD 1847#if EV_USE_EVENTFD
1262 if (evfd >= 0) 1848 if (evfd >= 0)
1263 { 1849 {
1264 uint64_t counter = 1; 1850 uint64_t counter = 1;
1265 write (evfd, &counter, sizeof (uint64_t)); 1851 write (evfd, &counter, sizeof (uint64_t));
1266 } 1852 }
1267 else 1853 else
1268#endif 1854#endif
1855 {
1856 /* win32 people keep sending patches that change this write() to send() */
1857 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1858 /* so when you think this write should be a send instead, please find out */
1859 /* where your send() is from - it's definitely not the microsoft send, and */
1860 /* tell me. thank you. */
1269 write (evpipe [1], &dummy, 1); 1861 write (evpipe [1], &(evpipe [1]), 1);
1862 }
1270 1863
1271 errno = old_errno; 1864 errno = old_errno;
1272 } 1865 }
1273} 1866}
1274 1867
… …
1277static void 1870static void
1278pipecb (EV_P_ ev_io *iow, int revents) 1871pipecb (EV_P_ ev_io *iow, int revents)
1279{ 1872{
1280 int i; 1873 int i;
1281 1874
1875 if (revents & EV_READ)
1876 {
1282#if EV_USE_EVENTFD 1877#if EV_USE_EVENTFD
1283 if (evfd >= 0) 1878 if (evfd >= 0)
1284 { 1879 {
1285 uint64_t counter; 1880 uint64_t counter;
1286 read (evfd, &counter, sizeof (uint64_t)); 1881 read (evfd, &counter, sizeof (uint64_t));
1287 } 1882 }
1288 else 1883 else
1289#endif 1884#endif
1290 { 1885 {
1291 char dummy; 1886 char dummy;
1887 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1292 read (evpipe [0], &dummy, 1); 1888 read (evpipe [0], &dummy, 1);
1889 }
1293 } 1890 }
1294 1891
1892 pipe_write_skipped = 0;
1893
1894#if EV_SIGNAL_ENABLE
1295 if (sig_pending) 1895 if (sig_pending)
1296 { 1896 {
1297 sig_pending = 0; 1897 sig_pending = 0;
1298 1898
1299 for (i = EV_NSIG - 1; i--; ) 1899 for (i = EV_NSIG - 1; i--; )
1300 if (expect_false (signals [i].pending)) 1900 if (expect_false (signals [i].pending))
1301 ev_feed_signal_event (EV_A_ i + 1); 1901 ev_feed_signal_event (EV_A_ i + 1);
1302 } 1902 }
1903#endif
1303 1904
1304#if EV_ASYNC_ENABLE 1905#if EV_ASYNC_ENABLE
1305 if (async_pending) 1906 if (async_pending)
1306 { 1907 {
1307 async_pending = 0; 1908 async_pending = 0;
… …
1316#endif 1917#endif
1317} 1918}
1318 1919
1319/*****************************************************************************/ 1920/*****************************************************************************/
1320 1921
1922void
1923ev_feed_signal (int signum)
1924{
1925#if EV_MULTIPLICITY
1926 EV_P = signals [signum - 1].loop;
1927
1928 if (!EV_A)
1929 return;
1930#endif
1931
1932 if (!ev_active (&pipe_w))
1933 return;
1934
1935 signals [signum - 1].pending = 1;
1936 evpipe_write (EV_A_ &sig_pending);
1937}
1938
1321static void 1939static void
1322ev_sighandler (int signum) 1940ev_sighandler (int signum)
1323{ 1941{
1324#if EV_MULTIPLICITY
1325 EV_P = signals [signum - 1].loop;
1326#endif
1327
1328#ifdef _WIN32 1942#ifdef _WIN32
1329 signal (signum, ev_sighandler); 1943 signal (signum, ev_sighandler);
1330#endif 1944#endif
1331 1945
1332 signals [signum - 1].pending = 1; 1946 ev_feed_signal (signum);
1333 evpipe_write (EV_A_ &sig_pending);
1334} 1947}
1335 1948
1336void noinline 1949void noinline
1337ev_feed_signal_event (EV_P_ int signum) 1950ev_feed_signal_event (EV_P_ int signum)
1338{ 1951{
… …
1438 2051
1439#endif 2052#endif
1440 2053
1441/*****************************************************************************/ 2054/*****************************************************************************/
1442 2055
2056#if EV_USE_IOCP
2057# include "ev_iocp.c"
2058#endif
1443#if EV_USE_PORT 2059#if EV_USE_PORT
1444# include "ev_port.c" 2060# include "ev_port.c"
1445#endif 2061#endif
1446#if EV_USE_KQUEUE 2062#if EV_USE_KQUEUE
1447# include "ev_kqueue.c" 2063# include "ev_kqueue.c"
… …
1454#endif 2070#endif
1455#if EV_USE_SELECT 2071#if EV_USE_SELECT
1456# include "ev_select.c" 2072# include "ev_select.c"
1457#endif 2073#endif
1458 2074
1459int 2075int ecb_cold
1460ev_version_major (void) 2076ev_version_major (void)
1461{ 2077{
1462 return EV_VERSION_MAJOR; 2078 return EV_VERSION_MAJOR;
1463} 2079}
1464 2080
1465int 2081int ecb_cold
1466ev_version_minor (void) 2082ev_version_minor (void)
1467{ 2083{
1468 return EV_VERSION_MINOR; 2084 return EV_VERSION_MINOR;
1469} 2085}
1470 2086
1471/* return true if we are running with elevated privileges and should ignore env variables */ 2087/* return true if we are running with elevated privileges and should ignore env variables */
1472int inline_size 2088int inline_size ecb_cold
1473enable_secure (void) 2089enable_secure (void)
1474{ 2090{
1475#ifdef _WIN32 2091#ifdef _WIN32
1476 return 0; 2092 return 0;
1477#else 2093#else
1478 return getuid () != geteuid () 2094 return getuid () != geteuid ()
1479 || getgid () != getegid (); 2095 || getgid () != getegid ();
1480#endif 2096#endif
1481} 2097}
1482 2098
1483unsigned int 2099unsigned int ecb_cold
1484ev_supported_backends (void) 2100ev_supported_backends (void)
1485{ 2101{
1486 unsigned int flags = 0; 2102 unsigned int flags = 0;
1487 2103
1488 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2104 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
1492 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2108 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1493 2109
1494 return flags; 2110 return flags;
1495} 2111}
1496 2112
1497unsigned int 2113unsigned int ecb_cold
1498ev_recommended_backends (void) 2114ev_recommended_backends (void)
1499{ 2115{
1500 unsigned int flags = ev_supported_backends (); 2116 unsigned int flags = ev_supported_backends ();
1501 2117
1502#ifndef __NetBSD__ 2118#ifndef __NetBSD__
… …
1507#ifdef __APPLE__ 2123#ifdef __APPLE__
1508 /* only select works correctly on that "unix-certified" platform */ 2124 /* only select works correctly on that "unix-certified" platform */
1509 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */ 2125 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1510 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */ 2126 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1511#endif 2127#endif
2128#ifdef __FreeBSD__
2129 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2130#endif
1512 2131
1513 return flags; 2132 return flags;
1514} 2133}
1515 2134
1516unsigned int 2135unsigned int ecb_cold
1517ev_embeddable_backends (void) 2136ev_embeddable_backends (void)
1518{ 2137{
1519 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2138 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1520 2139
1521 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2140 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1522 /* please fix it and tell me how to detect the fix */ 2141 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1523 flags &= ~EVBACKEND_EPOLL; 2142 flags &= ~EVBACKEND_EPOLL;
1524 2143
1525 return flags; 2144 return flags;
1526} 2145}
1527 2146
1528unsigned int 2147unsigned int
… …
1531 return backend; 2150 return backend;
1532} 2151}
1533 2152
1534#if EV_FEATURE_API 2153#if EV_FEATURE_API
1535unsigned int 2154unsigned int
1536ev_loop_count (EV_P) 2155ev_iteration (EV_P)
1537{ 2156{
1538 return loop_count; 2157 return loop_count;
1539} 2158}
1540 2159
1541unsigned int 2160unsigned int
1542ev_loop_depth (EV_P) 2161ev_depth (EV_P)
1543{ 2162{
1544 return loop_depth; 2163 return loop_depth;
1545} 2164}
1546 2165
1547void 2166void
… …
1566ev_userdata (EV_P) 2185ev_userdata (EV_P)
1567{ 2186{
1568 return userdata; 2187 return userdata;
1569} 2188}
1570 2189
2190void
1571void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2191ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1572{ 2192{
1573 invoke_cb = invoke_pending_cb; 2193 invoke_cb = invoke_pending_cb;
1574} 2194}
1575 2195
2196void
1576void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2197ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1577{ 2198{
1578 release_cb = release; 2199 release_cb = release;
1579 acquire_cb = acquire; 2200 acquire_cb = acquire;
1580} 2201}
1581#endif 2202#endif
1582 2203
1583/* initialise a loop structure, must be zero-initialised */ 2204/* initialise a loop structure, must be zero-initialised */
1584static void noinline 2205static void noinline ecb_cold
1585loop_init (EV_P_ unsigned int flags) 2206loop_init (EV_P_ unsigned int flags)
1586{ 2207{
1587 if (!backend) 2208 if (!backend)
1588 { 2209 {
2210 origflags = flags;
2211
1589#if EV_USE_REALTIME 2212#if EV_USE_REALTIME
1590 if (!have_realtime) 2213 if (!have_realtime)
1591 { 2214 {
1592 struct timespec ts; 2215 struct timespec ts;
1593 2216
… …
1615 if (!(flags & EVFLAG_NOENV) 2238 if (!(flags & EVFLAG_NOENV)
1616 && !enable_secure () 2239 && !enable_secure ()
1617 && getenv ("LIBEV_FLAGS")) 2240 && getenv ("LIBEV_FLAGS"))
1618 flags = atoi (getenv ("LIBEV_FLAGS")); 2241 flags = atoi (getenv ("LIBEV_FLAGS"));
1619 2242
1620 ev_rt_now = ev_time (); 2243 ev_rt_now = ev_time ();
1621 mn_now = get_clock (); 2244 mn_now = get_clock ();
1622 now_floor = mn_now; 2245 now_floor = mn_now;
1623 rtmn_diff = ev_rt_now - mn_now; 2246 rtmn_diff = ev_rt_now - mn_now;
1624#if EV_FEATURE_API 2247#if EV_FEATURE_API
1625 invoke_cb = ev_invoke_pending; 2248 invoke_cb = ev_invoke_pending;
1626#endif 2249#endif
1627 2250
1628 io_blocktime = 0.; 2251 io_blocktime = 0.;
1629 timeout_blocktime = 0.; 2252 timeout_blocktime = 0.;
1630 backend = 0; 2253 backend = 0;
1631 backend_fd = -1; 2254 backend_fd = -1;
1632 sig_pending = 0; 2255 sig_pending = 0;
1633#if EV_ASYNC_ENABLE 2256#if EV_ASYNC_ENABLE
1634 async_pending = 0; 2257 async_pending = 0;
1635#endif 2258#endif
2259 pipe_write_skipped = 0;
2260 pipe_write_wanted = 0;
1636#if EV_USE_INOTIFY 2261#if EV_USE_INOTIFY
1637 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2262 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1638#endif 2263#endif
1639#if EV_USE_SIGNALFD 2264#if EV_USE_SIGNALFD
1640 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2265 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1641#endif 2266#endif
1642 2267
1643 if (!(flags & 0x0000ffffU)) 2268 if (!(flags & EVBACKEND_MASK))
1644 flags |= ev_recommended_backends (); 2269 flags |= ev_recommended_backends ();
1645 2270
2271#if EV_USE_IOCP
2272 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2273#endif
1646#if EV_USE_PORT 2274#if EV_USE_PORT
1647 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2275 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1648#endif 2276#endif
1649#if EV_USE_KQUEUE 2277#if EV_USE_KQUEUE
1650 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2278 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1667#endif 2295#endif
1668 } 2296 }
1669} 2297}
1670 2298
1671/* free up a loop structure */ 2299/* free up a loop structure */
1672static void noinline 2300void ecb_cold
1673loop_destroy (EV_P) 2301ev_loop_destroy (EV_P)
1674{ 2302{
1675 int i; 2303 int i;
2304
2305#if EV_MULTIPLICITY
2306 /* mimic free (0) */
2307 if (!EV_A)
2308 return;
2309#endif
2310
2311#if EV_CLEANUP_ENABLE
2312 /* queue cleanup watchers (and execute them) */
2313 if (expect_false (cleanupcnt))
2314 {
2315 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2316 EV_INVOKE_PENDING;
2317 }
2318#endif
2319
2320#if EV_CHILD_ENABLE
2321 if (ev_is_active (&childev))
2322 {
2323 ev_ref (EV_A); /* child watcher */
2324 ev_signal_stop (EV_A_ &childev);
2325 }
2326#endif
1676 2327
1677 if (ev_is_active (&pipe_w)) 2328 if (ev_is_active (&pipe_w))
1678 { 2329 {
1679 /*ev_ref (EV_A);*/ 2330 /*ev_ref (EV_A);*/
1680 /*ev_io_stop (EV_A_ &pipe_w);*/ 2331 /*ev_io_stop (EV_A_ &pipe_w);*/
… …
1702#endif 2353#endif
1703 2354
1704 if (backend_fd >= 0) 2355 if (backend_fd >= 0)
1705 close (backend_fd); 2356 close (backend_fd);
1706 2357
2358#if EV_USE_IOCP
2359 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2360#endif
1707#if EV_USE_PORT 2361#if EV_USE_PORT
1708 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2362 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1709#endif 2363#endif
1710#if EV_USE_KQUEUE 2364#if EV_USE_KQUEUE
1711 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2365 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1738 array_free (periodic, EMPTY); 2392 array_free (periodic, EMPTY);
1739#endif 2393#endif
1740#if EV_FORK_ENABLE 2394#if EV_FORK_ENABLE
1741 array_free (fork, EMPTY); 2395 array_free (fork, EMPTY);
1742#endif 2396#endif
2397#if EV_CLEANUP_ENABLE
2398 array_free (cleanup, EMPTY);
2399#endif
1743 array_free (prepare, EMPTY); 2400 array_free (prepare, EMPTY);
1744 array_free (check, EMPTY); 2401 array_free (check, EMPTY);
1745#if EV_ASYNC_ENABLE 2402#if EV_ASYNC_ENABLE
1746 array_free (async, EMPTY); 2403 array_free (async, EMPTY);
1747#endif 2404#endif
1748 2405
1749 backend = 0; 2406 backend = 0;
2407
2408#if EV_MULTIPLICITY
2409 if (ev_is_default_loop (EV_A))
2410#endif
2411 ev_default_loop_ptr = 0;
2412#if EV_MULTIPLICITY
2413 else
2414 ev_free (EV_A);
2415#endif
1750} 2416}
1751 2417
1752#if EV_USE_INOTIFY 2418#if EV_USE_INOTIFY
1753inline_size void infy_fork (EV_P); 2419inline_size void infy_fork (EV_P);
1754#endif 2420#endif
… …
1769 infy_fork (EV_A); 2435 infy_fork (EV_A);
1770#endif 2436#endif
1771 2437
1772 if (ev_is_active (&pipe_w)) 2438 if (ev_is_active (&pipe_w))
1773 { 2439 {
1774 /* this "locks" the handlers against writing to the pipe */ 2440 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1775 /* while we modify the fd vars */
1776 sig_pending = 1;
1777#if EV_ASYNC_ENABLE
1778 async_pending = 1;
1779#endif
1780 2441
1781 ev_ref (EV_A); 2442 ev_ref (EV_A);
1782 ev_io_stop (EV_A_ &pipe_w); 2443 ev_io_stop (EV_A_ &pipe_w);
1783 2444
1784#if EV_USE_EVENTFD 2445#if EV_USE_EVENTFD
… …
1802 postfork = 0; 2463 postfork = 0;
1803} 2464}
1804 2465
1805#if EV_MULTIPLICITY 2466#if EV_MULTIPLICITY
1806 2467
1807struct ev_loop * 2468struct ev_loop * ecb_cold
1808ev_loop_new (unsigned int flags) 2469ev_loop_new (unsigned int flags)
1809{ 2470{
1810 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2471 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1811 2472
1812 memset (EV_A, 0, sizeof (struct ev_loop)); 2473 memset (EV_A, 0, sizeof (struct ev_loop));
1813 loop_init (EV_A_ flags); 2474 loop_init (EV_A_ flags);
1814 2475
1815 if (ev_backend (EV_A)) 2476 if (ev_backend (EV_A))
1816 return EV_A; 2477 return EV_A;
1817 2478
2479 ev_free (EV_A);
1818 return 0; 2480 return 0;
1819} 2481}
1820 2482
1821void
1822ev_loop_destroy (EV_P)
1823{
1824 loop_destroy (EV_A);
1825 ev_free (loop);
1826}
1827
1828void
1829ev_loop_fork (EV_P)
1830{
1831 postfork = 1; /* must be in line with ev_default_fork */
1832}
1833#endif /* multiplicity */ 2483#endif /* multiplicity */
1834 2484
1835#if EV_VERIFY 2485#if EV_VERIFY
1836static void noinline 2486static void noinline ecb_cold
1837verify_watcher (EV_P_ W w) 2487verify_watcher (EV_P_ W w)
1838{ 2488{
1839 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2489 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1840 2490
1841 if (w->pending) 2491 if (w->pending)
1842 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2492 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1843} 2493}
1844 2494
1845static void noinline 2495static void noinline ecb_cold
1846verify_heap (EV_P_ ANHE *heap, int N) 2496verify_heap (EV_P_ ANHE *heap, int N)
1847{ 2497{
1848 int i; 2498 int i;
1849 2499
1850 for (i = HEAP0; i < N + HEAP0; ++i) 2500 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1855 2505
1856 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2506 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1857 } 2507 }
1858} 2508}
1859 2509
1860static void noinline 2510static void noinline ecb_cold
1861array_verify (EV_P_ W *ws, int cnt) 2511array_verify (EV_P_ W *ws, int cnt)
1862{ 2512{
1863 while (cnt--) 2513 while (cnt--)
1864 { 2514 {
1865 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2515 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1867 } 2517 }
1868} 2518}
1869#endif 2519#endif
1870 2520
1871#if EV_FEATURE_API 2521#if EV_FEATURE_API
1872void 2522void ecb_cold
1873ev_loop_verify (EV_P) 2523ev_verify (EV_P)
1874{ 2524{
1875#if EV_VERIFY 2525#if EV_VERIFY
1876 int i; 2526 int i;
1877 WL w; 2527 WL w;
1878 2528
… …
1912#if EV_FORK_ENABLE 2562#if EV_FORK_ENABLE
1913 assert (forkmax >= forkcnt); 2563 assert (forkmax >= forkcnt);
1914 array_verify (EV_A_ (W *)forks, forkcnt); 2564 array_verify (EV_A_ (W *)forks, forkcnt);
1915#endif 2565#endif
1916 2566
2567#if EV_CLEANUP_ENABLE
2568 assert (cleanupmax >= cleanupcnt);
2569 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2570#endif
2571
1917#if EV_ASYNC_ENABLE 2572#if EV_ASYNC_ENABLE
1918 assert (asyncmax >= asynccnt); 2573 assert (asyncmax >= asynccnt);
1919 array_verify (EV_A_ (W *)asyncs, asynccnt); 2574 array_verify (EV_A_ (W *)asyncs, asynccnt);
1920#endif 2575#endif
1921 2576
… …
1938#endif 2593#endif
1939} 2594}
1940#endif 2595#endif
1941 2596
1942#if EV_MULTIPLICITY 2597#if EV_MULTIPLICITY
1943struct ev_loop * 2598struct ev_loop * ecb_cold
1944ev_default_loop_init (unsigned int flags)
1945#else 2599#else
1946int 2600int
2601#endif
1947ev_default_loop (unsigned int flags) 2602ev_default_loop (unsigned int flags)
1948#endif
1949{ 2603{
1950 if (!ev_default_loop_ptr) 2604 if (!ev_default_loop_ptr)
1951 { 2605 {
1952#if EV_MULTIPLICITY 2606#if EV_MULTIPLICITY
1953 EV_P = ev_default_loop_ptr = &default_loop_struct; 2607 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1972 2626
1973 return ev_default_loop_ptr; 2627 return ev_default_loop_ptr;
1974} 2628}
1975 2629
1976void 2630void
1977ev_default_destroy (void) 2631ev_loop_fork (EV_P)
1978{ 2632{
1979#if EV_MULTIPLICITY
1980 EV_P = ev_default_loop_ptr;
1981#endif
1982
1983 ev_default_loop_ptr = 0;
1984
1985#if EV_CHILD_ENABLE
1986 ev_ref (EV_A); /* child watcher */
1987 ev_signal_stop (EV_A_ &childev);
1988#endif
1989
1990 loop_destroy (EV_A);
1991}
1992
1993void
1994ev_default_fork (void)
1995{
1996#if EV_MULTIPLICITY
1997 EV_P = ev_default_loop_ptr;
1998#endif
1999
2000 postfork = 1; /* must be in line with ev_loop_fork */ 2633 postfork = 1; /* must be in line with ev_default_fork */
2001} 2634}
2002 2635
2003/*****************************************************************************/ 2636/*****************************************************************************/
2004 2637
2005void 2638void
… …
2027 2660
2028 for (pri = NUMPRI; pri--; ) 2661 for (pri = NUMPRI; pri--; )
2029 while (pendingcnt [pri]) 2662 while (pendingcnt [pri])
2030 { 2663 {
2031 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2664 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2032
2033 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2034 /* ^ this is no longer true, as pending_w could be here */
2035 2665
2036 p->w->pending = 0; 2666 p->w->pending = 0;
2037 EV_CB_INVOKE (p->w, p->events); 2667 EV_CB_INVOKE (p->w, p->events);
2038 EV_FREQUENT_CHECK; 2668 EV_FREQUENT_CHECK;
2039 } 2669 }
… …
2096 EV_FREQUENT_CHECK; 2726 EV_FREQUENT_CHECK;
2097 feed_reverse (EV_A_ (W)w); 2727 feed_reverse (EV_A_ (W)w);
2098 } 2728 }
2099 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now); 2729 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2100 2730
2101 feed_reverse_done (EV_A_ EV_TIMEOUT); 2731 feed_reverse_done (EV_A_ EV_TIMER);
2102 } 2732 }
2103} 2733}
2104 2734
2105#if EV_PERIODIC_ENABLE 2735#if EV_PERIODIC_ENABLE
2736
2737static void noinline
2738periodic_recalc (EV_P_ ev_periodic *w)
2739{
2740 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2741 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2742
2743 /* the above almost always errs on the low side */
2744 while (at <= ev_rt_now)
2745 {
2746 ev_tstamp nat = at + w->interval;
2747
2748 /* when resolution fails us, we use ev_rt_now */
2749 if (expect_false (nat == at))
2750 {
2751 at = ev_rt_now;
2752 break;
2753 }
2754
2755 at = nat;
2756 }
2757
2758 ev_at (w) = at;
2759}
2760
2106/* make periodics pending */ 2761/* make periodics pending */
2107inline_size void 2762inline_size void
2108periodics_reify (EV_P) 2763periodics_reify (EV_P)
2109{ 2764{
2110 EV_FREQUENT_CHECK; 2765 EV_FREQUENT_CHECK;
… …
2129 ANHE_at_cache (periodics [HEAP0]); 2784 ANHE_at_cache (periodics [HEAP0]);
2130 downheap (periodics, periodiccnt, HEAP0); 2785 downheap (periodics, periodiccnt, HEAP0);
2131 } 2786 }
2132 else if (w->interval) 2787 else if (w->interval)
2133 { 2788 {
2134 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2789 periodic_recalc (EV_A_ w);
2135 /* if next trigger time is not sufficiently in the future, put it there */
2136 /* this might happen because of floating point inexactness */
2137 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2138 {
2139 ev_at (w) += w->interval;
2140
2141 /* if interval is unreasonably low we might still have a time in the past */
2142 /* so correct this. this will make the periodic very inexact, but the user */
2143 /* has effectively asked to get triggered more often than possible */
2144 if (ev_at (w) < ev_rt_now)
2145 ev_at (w) = ev_rt_now;
2146 }
2147
2148 ANHE_at_cache (periodics [HEAP0]); 2790 ANHE_at_cache (periodics [HEAP0]);
2149 downheap (periodics, periodiccnt, HEAP0); 2791 downheap (periodics, periodiccnt, HEAP0);
2150 } 2792 }
2151 else 2793 else
2152 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 2794 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2159 feed_reverse_done (EV_A_ EV_PERIODIC); 2801 feed_reverse_done (EV_A_ EV_PERIODIC);
2160 } 2802 }
2161} 2803}
2162 2804
2163/* simply recalculate all periodics */ 2805/* simply recalculate all periodics */
2164/* TODO: maybe ensure that at leats one event happens when jumping forward? */ 2806/* TODO: maybe ensure that at least one event happens when jumping forward? */
2165static void noinline 2807static void noinline ecb_cold
2166periodics_reschedule (EV_P) 2808periodics_reschedule (EV_P)
2167{ 2809{
2168 int i; 2810 int i;
2169 2811
2170 /* adjust periodics after time jump */ 2812 /* adjust periodics after time jump */
… …
2173 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 2815 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2174 2816
2175 if (w->reschedule_cb) 2817 if (w->reschedule_cb)
2176 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2818 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2177 else if (w->interval) 2819 else if (w->interval)
2178 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2820 periodic_recalc (EV_A_ w);
2179 2821
2180 ANHE_at_cache (periodics [i]); 2822 ANHE_at_cache (periodics [i]);
2181 } 2823 }
2182 2824
2183 reheap (periodics, periodiccnt); 2825 reheap (periodics, periodiccnt);
2184} 2826}
2185#endif 2827#endif
2186 2828
2187/* adjust all timers by a given offset */ 2829/* adjust all timers by a given offset */
2188static void noinline 2830static void noinline ecb_cold
2189timers_reschedule (EV_P_ ev_tstamp adjust) 2831timers_reschedule (EV_P_ ev_tstamp adjust)
2190{ 2832{
2191 int i; 2833 int i;
2192 2834
2193 for (i = 0; i < timercnt; ++i) 2835 for (i = 0; i < timercnt; ++i)
… …
2230 * doesn't hurt either as we only do this on time-jumps or 2872 * doesn't hurt either as we only do this on time-jumps or
2231 * in the unlikely event of having been preempted here. 2873 * in the unlikely event of having been preempted here.
2232 */ 2874 */
2233 for (i = 4; --i; ) 2875 for (i = 4; --i; )
2234 { 2876 {
2877 ev_tstamp diff;
2235 rtmn_diff = ev_rt_now - mn_now; 2878 rtmn_diff = ev_rt_now - mn_now;
2236 2879
2880 diff = odiff - rtmn_diff;
2881
2237 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 2882 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2238 return; /* all is well */ 2883 return; /* all is well */
2239 2884
2240 ev_rt_now = ev_time (); 2885 ev_rt_now = ev_time ();
2241 mn_now = get_clock (); 2886 mn_now = get_clock ();
2242 now_floor = mn_now; 2887 now_floor = mn_now;
… …
2265 mn_now = ev_rt_now; 2910 mn_now = ev_rt_now;
2266 } 2911 }
2267} 2912}
2268 2913
2269void 2914void
2270ev_loop (EV_P_ int flags) 2915ev_run (EV_P_ int flags)
2271{ 2916{
2272#if EV_FEATURE_API 2917#if EV_FEATURE_API
2273 ++loop_depth; 2918 ++loop_depth;
2274#endif 2919#endif
2275 2920
2276 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE)); 2921 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2277 2922
2278 loop_done = EVUNLOOP_CANCEL; 2923 loop_done = EVBREAK_CANCEL;
2279 2924
2280 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ 2925 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2281 2926
2282 do 2927 do
2283 { 2928 {
2284#if EV_VERIFY >= 2 2929#if EV_VERIFY >= 2
2285 ev_loop_verify (EV_A); 2930 ev_verify (EV_A);
2286#endif 2931#endif
2287 2932
2288#ifndef _WIN32 2933#ifndef _WIN32
2289 if (expect_false (curpid)) /* penalise the forking check even more */ 2934 if (expect_false (curpid)) /* penalise the forking check even more */
2290 if (expect_false (getpid () != curpid)) 2935 if (expect_false (getpid () != curpid))
… …
2326 /* calculate blocking time */ 2971 /* calculate blocking time */
2327 { 2972 {
2328 ev_tstamp waittime = 0.; 2973 ev_tstamp waittime = 0.;
2329 ev_tstamp sleeptime = 0.; 2974 ev_tstamp sleeptime = 0.;
2330 2975
2976 /* remember old timestamp for io_blocktime calculation */
2977 ev_tstamp prev_mn_now = mn_now;
2978
2979 /* update time to cancel out callback processing overhead */
2980 time_update (EV_A_ 1e100);
2981
2982 /* from now on, we want a pipe-wake-up */
2983 pipe_write_wanted = 1;
2984
2985 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
2986
2331 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 2987 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2332 { 2988 {
2333 /* remember old timestamp for io_blocktime calculation */
2334 ev_tstamp prev_mn_now = mn_now;
2335
2336 /* update time to cancel out callback processing overhead */
2337 time_update (EV_A_ 1e100);
2338
2339 waittime = MAX_BLOCKTIME; 2989 waittime = MAX_BLOCKTIME;
2340 2990
2341 if (timercnt) 2991 if (timercnt)
2342 { 2992 {
2343 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 2993 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2344 if (waittime > to) waittime = to; 2994 if (waittime > to) waittime = to;
2345 } 2995 }
2346 2996
2347#if EV_PERIODIC_ENABLE 2997#if EV_PERIODIC_ENABLE
2348 if (periodiccnt) 2998 if (periodiccnt)
2349 { 2999 {
2350 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3000 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2351 if (waittime > to) waittime = to; 3001 if (waittime > to) waittime = to;
2352 } 3002 }
2353#endif 3003#endif
2354 3004
2355 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3005 /* don't let timeouts decrease the waittime below timeout_blocktime */
2356 if (expect_false (waittime < timeout_blocktime)) 3006 if (expect_false (waittime < timeout_blocktime))
2357 waittime = timeout_blocktime; 3007 waittime = timeout_blocktime;
3008
3009 /* at this point, we NEED to wait, so we have to ensure */
3010 /* to pass a minimum nonzero value to the backend */
3011 if (expect_false (waittime < backend_mintime))
3012 waittime = backend_mintime;
2358 3013
2359 /* extra check because io_blocktime is commonly 0 */ 3014 /* extra check because io_blocktime is commonly 0 */
2360 if (expect_false (io_blocktime)) 3015 if (expect_false (io_blocktime))
2361 { 3016 {
2362 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3017 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2363 3018
2364 if (sleeptime > waittime - backend_fudge) 3019 if (sleeptime > waittime - backend_mintime)
2365 sleeptime = waittime - backend_fudge; 3020 sleeptime = waittime - backend_mintime;
2366 3021
2367 if (expect_true (sleeptime > 0.)) 3022 if (expect_true (sleeptime > 0.))
2368 { 3023 {
2369 ev_sleep (sleeptime); 3024 ev_sleep (sleeptime);
2370 waittime -= sleeptime; 3025 waittime -= sleeptime;
… …
2373 } 3028 }
2374 3029
2375#if EV_FEATURE_API 3030#if EV_FEATURE_API
2376 ++loop_count; 3031 ++loop_count;
2377#endif 3032#endif
2378 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ 3033 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2379 backend_poll (EV_A_ waittime); 3034 backend_poll (EV_A_ waittime);
2380 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */ 3035 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3036
3037 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3038
3039 if (pipe_write_skipped)
3040 {
3041 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3042 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3043 }
3044
2381 3045
2382 /* update ev_rt_now, do magic */ 3046 /* update ev_rt_now, do magic */
2383 time_update (EV_A_ waittime + sleeptime); 3047 time_update (EV_A_ waittime + sleeptime);
2384 } 3048 }
2385 3049
… …
2403 EV_INVOKE_PENDING; 3067 EV_INVOKE_PENDING;
2404 } 3068 }
2405 while (expect_true ( 3069 while (expect_true (
2406 activecnt 3070 activecnt
2407 && !loop_done 3071 && !loop_done
2408 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3072 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2409 )); 3073 ));
2410 3074
2411 if (loop_done == EVUNLOOP_ONE) 3075 if (loop_done == EVBREAK_ONE)
2412 loop_done = EVUNLOOP_CANCEL; 3076 loop_done = EVBREAK_CANCEL;
2413 3077
2414#if EV_FEATURE_API 3078#if EV_FEATURE_API
2415 --loop_depth; 3079 --loop_depth;
2416#endif 3080#endif
2417} 3081}
2418 3082
2419void 3083void
2420ev_unloop (EV_P_ int how) 3084ev_break (EV_P_ int how)
2421{ 3085{
2422 loop_done = how; 3086 loop_done = how;
2423} 3087}
2424 3088
2425void 3089void
… …
2573 EV_FREQUENT_CHECK; 3237 EV_FREQUENT_CHECK;
2574 3238
2575 wlist_del (&anfds[w->fd].head, (WL)w); 3239 wlist_del (&anfds[w->fd].head, (WL)w);
2576 ev_stop (EV_A_ (W)w); 3240 ev_stop (EV_A_ (W)w);
2577 3241
2578 fd_change (EV_A_ w->fd, 1); 3242 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2579 3243
2580 EV_FREQUENT_CHECK; 3244 EV_FREQUENT_CHECK;
2581} 3245}
2582 3246
2583void noinline 3247void noinline
… …
2636 3300
2637void noinline 3301void noinline
2638ev_timer_again (EV_P_ ev_timer *w) 3302ev_timer_again (EV_P_ ev_timer *w)
2639{ 3303{
2640 EV_FREQUENT_CHECK; 3304 EV_FREQUENT_CHECK;
3305
3306 clear_pending (EV_A_ (W)w);
2641 3307
2642 if (ev_is_active (w)) 3308 if (ev_is_active (w))
2643 { 3309 {
2644 if (w->repeat) 3310 if (w->repeat)
2645 { 3311 {
… …
2675 if (w->reschedule_cb) 3341 if (w->reschedule_cb)
2676 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3342 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2677 else if (w->interval) 3343 else if (w->interval)
2678 { 3344 {
2679 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 3345 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2680 /* this formula differs from the one in periodic_reify because we do not always round up */ 3346 periodic_recalc (EV_A_ w);
2681 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2682 } 3347 }
2683 else 3348 else
2684 ev_at (w) = w->offset; 3349 ev_at (w) = w->offset;
2685 3350
2686 EV_FREQUENT_CHECK; 3351 EV_FREQUENT_CHECK;
… …
2807 sa.sa_handler = ev_sighandler; 3472 sa.sa_handler = ev_sighandler;
2808 sigfillset (&sa.sa_mask); 3473 sigfillset (&sa.sa_mask);
2809 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3474 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2810 sigaction (w->signum, &sa, 0); 3475 sigaction (w->signum, &sa, 0);
2811 3476
3477 if (origflags & EVFLAG_NOSIGMASK)
3478 {
2812 sigemptyset (&sa.sa_mask); 3479 sigemptyset (&sa.sa_mask);
2813 sigaddset (&sa.sa_mask, w->signum); 3480 sigaddset (&sa.sa_mask, w->signum);
2814 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 3481 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3482 }
2815#endif 3483#endif
2816 } 3484 }
2817 3485
2818 EV_FREQUENT_CHECK; 3486 EV_FREQUENT_CHECK;
2819} 3487}
… …
2960 if (!pend || pend == path) 3628 if (!pend || pend == path)
2961 break; 3629 break;
2962 3630
2963 *pend = 0; 3631 *pend = 0;
2964 w->wd = inotify_add_watch (fs_fd, path, mask); 3632 w->wd = inotify_add_watch (fs_fd, path, mask);
2965 } 3633 }
2966 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3634 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2967 } 3635 }
2968 } 3636 }
2969 3637
2970 if (w->wd >= 0) 3638 if (w->wd >= 0)
… …
3037 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3705 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3038 ofs += sizeof (struct inotify_event) + ev->len; 3706 ofs += sizeof (struct inotify_event) + ev->len;
3039 } 3707 }
3040} 3708}
3041 3709
3042inline_size unsigned int
3043ev_linux_version (void)
3044{
3045 struct utsname buf;
3046 unsigned int v;
3047 int i;
3048 char *p = buf.release;
3049
3050 if (uname (&buf))
3051 return 0;
3052
3053 for (i = 3+1; --i; )
3054 {
3055 unsigned int c = 0;
3056
3057 for (;;)
3058 {
3059 if (*p >= '0' && *p <= '9')
3060 c = c * 10 + *p++ - '0';
3061 else
3062 {
3063 p += *p == '.';
3064 break;
3065 }
3066 }
3067
3068 v = (v << 8) | c;
3069 }
3070
3071 return v;
3072}
3073
3074inline_size void 3710inline_size void ecb_cold
3075ev_check_2625 (EV_P) 3711ev_check_2625 (EV_P)
3076{ 3712{
3077 /* kernels < 2.6.25 are borked 3713 /* kernels < 2.6.25 are borked
3078 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 3714 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3079 */ 3715 */
… …
3400 4036
3401#if EV_EMBED_ENABLE 4037#if EV_EMBED_ENABLE
3402void noinline 4038void noinline
3403ev_embed_sweep (EV_P_ ev_embed *w) 4039ev_embed_sweep (EV_P_ ev_embed *w)
3404{ 4040{
3405 ev_loop (w->other, EVLOOP_NONBLOCK); 4041 ev_run (w->other, EVRUN_NOWAIT);
3406} 4042}
3407 4043
3408static void 4044static void
3409embed_io_cb (EV_P_ ev_io *io, int revents) 4045embed_io_cb (EV_P_ ev_io *io, int revents)
3410{ 4046{
3411 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4047 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3412 4048
3413 if (ev_cb (w)) 4049 if (ev_cb (w))
3414 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4050 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3415 else 4051 else
3416 ev_loop (w->other, EVLOOP_NONBLOCK); 4052 ev_run (w->other, EVRUN_NOWAIT);
3417} 4053}
3418 4054
3419static void 4055static void
3420embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4056embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3421{ 4057{
… …
3425 EV_P = w->other; 4061 EV_P = w->other;
3426 4062
3427 while (fdchangecnt) 4063 while (fdchangecnt)
3428 { 4064 {
3429 fd_reify (EV_A); 4065 fd_reify (EV_A);
3430 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4066 ev_run (EV_A_ EVRUN_NOWAIT);
3431 } 4067 }
3432 } 4068 }
3433} 4069}
3434 4070
3435static void 4071static void
… …
3441 4077
3442 { 4078 {
3443 EV_P = w->other; 4079 EV_P = w->other;
3444 4080
3445 ev_loop_fork (EV_A); 4081 ev_loop_fork (EV_A);
3446 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4082 ev_run (EV_A_ EVRUN_NOWAIT);
3447 } 4083 }
3448 4084
3449 ev_embed_start (EV_A_ w); 4085 ev_embed_start (EV_A_ w);
3450} 4086}
3451 4087
… …
3543 4179
3544 EV_FREQUENT_CHECK; 4180 EV_FREQUENT_CHECK;
3545} 4181}
3546#endif 4182#endif
3547 4183
4184#if EV_CLEANUP_ENABLE
4185void
4186ev_cleanup_start (EV_P_ ev_cleanup *w)
4187{
4188 if (expect_false (ev_is_active (w)))
4189 return;
4190
4191 EV_FREQUENT_CHECK;
4192
4193 ev_start (EV_A_ (W)w, ++cleanupcnt);
4194 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4195 cleanups [cleanupcnt - 1] = w;
4196
4197 /* cleanup watchers should never keep a refcount on the loop */
4198 ev_unref (EV_A);
4199 EV_FREQUENT_CHECK;
4200}
4201
4202void
4203ev_cleanup_stop (EV_P_ ev_cleanup *w)
4204{
4205 clear_pending (EV_A_ (W)w);
4206 if (expect_false (!ev_is_active (w)))
4207 return;
4208
4209 EV_FREQUENT_CHECK;
4210 ev_ref (EV_A);
4211
4212 {
4213 int active = ev_active (w);
4214
4215 cleanups [active - 1] = cleanups [--cleanupcnt];
4216 ev_active (cleanups [active - 1]) = active;
4217 }
4218
4219 ev_stop (EV_A_ (W)w);
4220
4221 EV_FREQUENT_CHECK;
4222}
4223#endif
4224
3548#if EV_ASYNC_ENABLE 4225#if EV_ASYNC_ENABLE
3549void 4226void
3550ev_async_start (EV_P_ ev_async *w) 4227ev_async_start (EV_P_ ev_async *w)
3551{ 4228{
3552 if (expect_false (ev_is_active (w))) 4229 if (expect_false (ev_is_active (w)))
3553 return; 4230 return;
4231
4232 w->sent = 0;
3554 4233
3555 evpipe_init (EV_A); 4234 evpipe_init (EV_A);
3556 4235
3557 EV_FREQUENT_CHECK; 4236 EV_FREQUENT_CHECK;
3558 4237
… …
3636{ 4315{
3637 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4316 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3638 4317
3639 if (expect_false (!once)) 4318 if (expect_false (!once))
3640 { 4319 {
3641 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4320 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3642 return; 4321 return;
3643 } 4322 }
3644 4323
3645 once->cb = cb; 4324 once->cb = cb;
3646 once->arg = arg; 4325 once->arg = arg;
… …
3661} 4340}
3662 4341
3663/*****************************************************************************/ 4342/*****************************************************************************/
3664 4343
3665#if EV_WALK_ENABLE 4344#if EV_WALK_ENABLE
3666void 4345void ecb_cold
3667ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4346ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3668{ 4347{
3669 int i, j; 4348 int i, j;
3670 ev_watcher_list *wl, *wn; 4349 ev_watcher_list *wl, *wn;
3671 4350
… …
3715 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4394 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3716#endif 4395#endif
3717 4396
3718#if EV_IDLE_ENABLE 4397#if EV_IDLE_ENABLE
3719 if (types & EV_IDLE) 4398 if (types & EV_IDLE)
3720 for (j = NUMPRI; i--; ) 4399 for (j = NUMPRI; j--; )
3721 for (i = idlecnt [j]; i--; ) 4400 for (i = idlecnt [j]; i--; )
3722 cb (EV_A_ EV_IDLE, idles [j][i]); 4401 cb (EV_A_ EV_IDLE, idles [j][i]);
3723#endif 4402#endif
3724 4403
3725#if EV_FORK_ENABLE 4404#if EV_FORK_ENABLE
… …
3778 4457
3779#if EV_MULTIPLICITY 4458#if EV_MULTIPLICITY
3780 #include "ev_wrap.h" 4459 #include "ev_wrap.h"
3781#endif 4460#endif
3782 4461
3783#ifdef __cplusplus
3784}
3785#endif
3786

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