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Comparing libev/ev.c (file contents):
Revision 1.370 by root, Sun Jan 30 19:05:41 2011 UTC vs.
Revision 1.452 by root, Mon Feb 18 03:20:29 2013 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010,2011 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
… …
338 357
339#ifndef EV_HEAP_CACHE_AT 358#ifndef EV_HEAP_CACHE_AT
340# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 359# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
341#endif 360#endif
342 361
362#ifdef ANDROID
363/* supposedly, android doesn't typedef fd_mask */
364# undef EV_USE_SELECT
365# define EV_USE_SELECT 0
366/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
367# undef EV_USE_CLOCK_SYSCALL
368# define EV_USE_CLOCK_SYSCALL 0
369#endif
370
371/* aix's poll.h seems to cause lots of trouble */
372#ifdef _AIX
373/* AIX has a completely broken poll.h header */
374# undef EV_USE_POLL
375# define EV_USE_POLL 0
376#endif
377
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 378/* 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. */ 379/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL 380#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h> 381# include <sys/syscall.h>
347# ifdef SYS_clock_gettime 382# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 383# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC 384# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 1 385# define EV_USE_MONOTONIC 1
351# else 386# else
… …
354# endif 389# endif
355#endif 390#endif
356 391
357/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 392/* this block fixes any misconfiguration where we know we run into trouble otherwise */
358 393
359#ifdef _AIX
360/* AIX has a completely broken poll.h header */
361# undef EV_USE_POLL
362# define EV_USE_POLL 0
363#endif
364
365#ifndef CLOCK_MONOTONIC 394#ifndef CLOCK_MONOTONIC
366# undef EV_USE_MONOTONIC 395# undef EV_USE_MONOTONIC
367# define EV_USE_MONOTONIC 0 396# define EV_USE_MONOTONIC 0
368#endif 397#endif
369 398
… …
377# define EV_USE_INOTIFY 0 406# define EV_USE_INOTIFY 0
378#endif 407#endif
379 408
380#if !EV_USE_NANOSLEEP 409#if !EV_USE_NANOSLEEP
381/* hp-ux has it in sys/time.h, which we unconditionally include above */ 410/* hp-ux has it in sys/time.h, which we unconditionally include above */
382# if !defined(_WIN32) && !defined(__hpux) 411# if !defined _WIN32 && !defined __hpux
383# include <sys/select.h> 412# include <sys/select.h>
384# endif 413# endif
385#endif 414#endif
386 415
387#if EV_USE_INOTIFY 416#if EV_USE_INOTIFY
… …
390/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 419/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
391# ifndef IN_DONT_FOLLOW 420# ifndef IN_DONT_FOLLOW
392# undef EV_USE_INOTIFY 421# undef EV_USE_INOTIFY
393# define EV_USE_INOTIFY 0 422# define EV_USE_INOTIFY 0
394# endif 423# endif
395#endif
396
397#if EV_SELECT_IS_WINSOCKET
398# include <winsock.h>
399#endif 424#endif
400 425
401#if EV_USE_EVENTFD 426#if EV_USE_EVENTFD
402/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 427/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
403# include <stdint.h> 428# include <stdint.h>
… …
443#else 468#else
444# define EV_FREQUENT_CHECK do { } while (0) 469# define EV_FREQUENT_CHECK do { } while (0)
445#endif 470#endif
446 471
447/* 472/*
448 * This is used to avoid floating point rounding problems. 473 * This is used to work around floating point rounding problems.
449 * It is added to ev_rt_now when scheduling periodics
450 * to ensure progress, time-wise, even when rounding
451 * errors are against us.
452 * This value is good at least till the year 4000. 474 * This value is good at least till the year 4000.
453 * Better solutions welcome.
454 */ 475 */
455#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 476#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
477/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
456 478
457#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 479#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
458#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 480#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
459 481
460#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 482#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
461#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0) 483#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
462 484
485/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
486/* ECB.H BEGIN */
487/*
488 * libecb - http://software.schmorp.de/pkg/libecb
489 *
490 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
491 * Copyright (©) 2011 Emanuele Giaquinta
492 * All rights reserved.
493 *
494 * Redistribution and use in source and binary forms, with or without modifica-
495 * tion, are permitted provided that the following conditions are met:
496 *
497 * 1. Redistributions of source code must retain the above copyright notice,
498 * this list of conditions and the following disclaimer.
499 *
500 * 2. Redistributions in binary form must reproduce the above copyright
501 * notice, this list of conditions and the following disclaimer in the
502 * documentation and/or other materials provided with the distribution.
503 *
504 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
505 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
506 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
507 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
508 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
509 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
510 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
511 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
512 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
513 * OF THE POSSIBILITY OF SUCH DAMAGE.
514 */
515
516#ifndef ECB_H
517#define ECB_H
518
519/* 16 bits major, 16 bits minor */
520#define ECB_VERSION 0x00010002
521
522#ifdef _WIN32
523 typedef signed char int8_t;
524 typedef unsigned char uint8_t;
525 typedef signed short int16_t;
526 typedef unsigned short uint16_t;
527 typedef signed int int32_t;
528 typedef unsigned int uint32_t;
463#if __GNUC__ >= 4 529 #if __GNUC__
464# define expect(expr,value) __builtin_expect ((expr),(value)) 530 typedef signed long long int64_t;
465# define noinline __attribute__ ((noinline)) 531 typedef unsigned long long uint64_t;
532 #else /* _MSC_VER || __BORLANDC__ */
533 typedef signed __int64 int64_t;
534 typedef unsigned __int64 uint64_t;
535 #endif
536 #ifdef _WIN64
537 #define ECB_PTRSIZE 8
538 typedef uint64_t uintptr_t;
539 typedef int64_t intptr_t;
540 #else
541 #define ECB_PTRSIZE 4
542 typedef uint32_t uintptr_t;
543 typedef int32_t intptr_t;
544 #endif
466#else 545#else
467# define expect(expr,value) (expr) 546 #include <inttypes.h>
468# define noinline 547 #if UINTMAX_MAX > 0xffffffffU
469# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 548 #define ECB_PTRSIZE 8
470# define inline 549 #else
550 #define ECB_PTRSIZE 4
551 #endif
471# endif 552#endif
553
554/* many compilers define _GNUC_ to some versions but then only implement
555 * what their idiot authors think are the "more important" extensions,
556 * causing enormous grief in return for some better fake benchmark numbers.
557 * or so.
558 * we try to detect these and simply assume they are not gcc - if they have
559 * an issue with that they should have done it right in the first place.
560 */
561#ifndef ECB_GCC_VERSION
562 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
563 #define ECB_GCC_VERSION(major,minor) 0
564 #else
565 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
472#endif 566 #endif
567#endif
473 568
569#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
570#define ECB_C99 (__STDC_VERSION__ >= 199901L)
571#define ECB_C11 (__STDC_VERSION__ >= 201112L)
572#define ECB_CPP (__cplusplus+0)
573#define ECB_CPP11 (__cplusplus >= 201103L)
574
575#if ECB_CPP
576 #define ECB_EXTERN_C extern "C"
577 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
578 #define ECB_EXTERN_C_END }
579#else
580 #define ECB_EXTERN_C extern
581 #define ECB_EXTERN_C_BEG
582 #define ECB_EXTERN_C_END
583#endif
584
585/*****************************************************************************/
586
587/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
588/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
589
590#if ECB_NO_THREADS
591 #define ECB_NO_SMP 1
592#endif
593
594#if ECB_NO_SMP
595 #define ECB_MEMORY_FENCE do { } while (0)
596#endif
597
598#ifndef ECB_MEMORY_FENCE
599 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
600 #if __i386 || __i386__
601 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
602 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
603 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
604 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
605 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
606 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
607 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
608 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
609 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
610 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
611 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
612 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
613 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
614 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
615 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
616 #elif __sparc || __sparc__
617 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
618 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
619 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
620 #elif defined __s390__ || defined __s390x__
621 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
622 #elif defined __mips__
623 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
624 #elif defined __alpha__
625 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
626 #elif defined __hppa__
627 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
628 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
629 #elif defined __ia64__
630 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
631 #endif
632 #endif
633#endif
634
635#ifndef ECB_MEMORY_FENCE
636 #if ECB_GCC_VERSION(4,7)
637 /* see comment below (stdatomic.h) about the C11 memory model. */
638 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
639
640 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
641 * without risking compile time errors with other compilers. We *could*
642 * define our own ecb_clang_has_feature, but I just can't be bothered to work
643 * around this shit time and again.
644 * #elif defined __clang && __has_feature (cxx_atomic)
645 * // see comment below (stdatomic.h) about the C11 memory model.
646 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
647 */
648
649 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
650 #define ECB_MEMORY_FENCE __sync_synchronize ()
651 #elif _MSC_VER >= 1400 /* VC++ 2005 */
652 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
653 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
654 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
655 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
656 #elif defined _WIN32
657 #include <WinNT.h>
658 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
659 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
660 #include <mbarrier.h>
661 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
662 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
663 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
664 #elif __xlC__
665 #define ECB_MEMORY_FENCE __sync ()
666 #endif
667#endif
668
669#ifndef ECB_MEMORY_FENCE
670 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
671 /* we assume that these memory fences work on all variables/all memory accesses, */
672 /* not just C11 atomics and atomic accesses */
673 #include <stdatomic.h>
674 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
675 /* any fence other than seq_cst, which isn't very efficient for us. */
676 /* Why that is, we don't know - either the C11 memory model is quite useless */
677 /* for most usages, or gcc and clang have a bug */
678 /* I *currently* lean towards the latter, and inefficiently implement */
679 /* all three of ecb's fences as a seq_cst fence */
680 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
681 #endif
682#endif
683
684#ifndef ECB_MEMORY_FENCE
685 #if !ECB_AVOID_PTHREADS
686 /*
687 * if you get undefined symbol references to pthread_mutex_lock,
688 * or failure to find pthread.h, then you should implement
689 * the ECB_MEMORY_FENCE operations for your cpu/compiler
690 * OR provide pthread.h and link against the posix thread library
691 * of your system.
692 */
693 #include <pthread.h>
694 #define ECB_NEEDS_PTHREADS 1
695 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
696
697 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
698 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
699 #endif
700#endif
701
702#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
703 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
704#endif
705
706#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
707 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
708#endif
709
710/*****************************************************************************/
711
712#if __cplusplus
713 #define ecb_inline static inline
714#elif ECB_GCC_VERSION(2,5)
715 #define ecb_inline static __inline__
716#elif ECB_C99
717 #define ecb_inline static inline
718#else
719 #define ecb_inline static
720#endif
721
722#if ECB_GCC_VERSION(3,3)
723 #define ecb_restrict __restrict__
724#elif ECB_C99
725 #define ecb_restrict restrict
726#else
727 #define ecb_restrict
728#endif
729
730typedef int ecb_bool;
731
732#define ECB_CONCAT_(a, b) a ## b
733#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
734#define ECB_STRINGIFY_(a) # a
735#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
736
737#define ecb_function_ ecb_inline
738
739#if ECB_GCC_VERSION(3,1)
740 #define ecb_attribute(attrlist) __attribute__(attrlist)
741 #define ecb_is_constant(expr) __builtin_constant_p (expr)
742 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
743 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
744#else
745 #define ecb_attribute(attrlist)
746 #define ecb_is_constant(expr) 0
747 #define ecb_expect(expr,value) (expr)
748 #define ecb_prefetch(addr,rw,locality)
749#endif
750
751/* no emulation for ecb_decltype */
752#if ECB_GCC_VERSION(4,5)
753 #define ecb_decltype(x) __decltype(x)
754#elif ECB_GCC_VERSION(3,0)
755 #define ecb_decltype(x) __typeof(x)
756#endif
757
758#define ecb_noinline ecb_attribute ((__noinline__))
759#define ecb_unused ecb_attribute ((__unused__))
760#define ecb_const ecb_attribute ((__const__))
761#define ecb_pure ecb_attribute ((__pure__))
762
763#if ECB_C11
764 #define ecb_noreturn _Noreturn
765#else
766 #define ecb_noreturn ecb_attribute ((__noreturn__))
767#endif
768
769#if ECB_GCC_VERSION(4,3)
770 #define ecb_artificial ecb_attribute ((__artificial__))
771 #define ecb_hot ecb_attribute ((__hot__))
772 #define ecb_cold ecb_attribute ((__cold__))
773#else
774 #define ecb_artificial
775 #define ecb_hot
776 #define ecb_cold
777#endif
778
779/* put around conditional expressions if you are very sure that the */
780/* expression is mostly true or mostly false. note that these return */
781/* booleans, not the expression. */
474#define expect_false(expr) expect ((expr) != 0, 0) 782#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475#define expect_true(expr) expect ((expr) != 0, 1) 783#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
784/* for compatibility to the rest of the world */
785#define ecb_likely(expr) ecb_expect_true (expr)
786#define ecb_unlikely(expr) ecb_expect_false (expr)
787
788/* count trailing zero bits and count # of one bits */
789#if ECB_GCC_VERSION(3,4)
790 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
791 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
792 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
793 #define ecb_ctz32(x) __builtin_ctz (x)
794 #define ecb_ctz64(x) __builtin_ctzll (x)
795 #define ecb_popcount32(x) __builtin_popcount (x)
796 /* no popcountll */
797#else
798 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
799 ecb_function_ int
800 ecb_ctz32 (uint32_t x)
801 {
802 int r = 0;
803
804 x &= ~x + 1; /* this isolates the lowest bit */
805
806#if ECB_branchless_on_i386
807 r += !!(x & 0xaaaaaaaa) << 0;
808 r += !!(x & 0xcccccccc) << 1;
809 r += !!(x & 0xf0f0f0f0) << 2;
810 r += !!(x & 0xff00ff00) << 3;
811 r += !!(x & 0xffff0000) << 4;
812#else
813 if (x & 0xaaaaaaaa) r += 1;
814 if (x & 0xcccccccc) r += 2;
815 if (x & 0xf0f0f0f0) r += 4;
816 if (x & 0xff00ff00) r += 8;
817 if (x & 0xffff0000) r += 16;
818#endif
819
820 return r;
821 }
822
823 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
824 ecb_function_ int
825 ecb_ctz64 (uint64_t x)
826 {
827 int shift = x & 0xffffffffU ? 0 : 32;
828 return ecb_ctz32 (x >> shift) + shift;
829 }
830
831 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
832 ecb_function_ int
833 ecb_popcount32 (uint32_t x)
834 {
835 x -= (x >> 1) & 0x55555555;
836 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
837 x = ((x >> 4) + x) & 0x0f0f0f0f;
838 x *= 0x01010101;
839
840 return x >> 24;
841 }
842
843 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
844 ecb_function_ int ecb_ld32 (uint32_t x)
845 {
846 int r = 0;
847
848 if (x >> 16) { x >>= 16; r += 16; }
849 if (x >> 8) { x >>= 8; r += 8; }
850 if (x >> 4) { x >>= 4; r += 4; }
851 if (x >> 2) { x >>= 2; r += 2; }
852 if (x >> 1) { r += 1; }
853
854 return r;
855 }
856
857 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
858 ecb_function_ int ecb_ld64 (uint64_t x)
859 {
860 int r = 0;
861
862 if (x >> 32) { x >>= 32; r += 32; }
863
864 return r + ecb_ld32 (x);
865 }
866#endif
867
868ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
869ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
870ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
871ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
872
873ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
874ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
875{
876 return ( (x * 0x0802U & 0x22110U)
877 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
878}
879
880ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
881ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
882{
883 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
884 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
885 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
886 x = ( x >> 8 ) | ( x << 8);
887
888 return x;
889}
890
891ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
892ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
893{
894 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
895 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
896 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
897 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
898 x = ( x >> 16 ) | ( x << 16);
899
900 return x;
901}
902
903/* popcount64 is only available on 64 bit cpus as gcc builtin */
904/* so for this version we are lazy */
905ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
906ecb_function_ int
907ecb_popcount64 (uint64_t x)
908{
909 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
910}
911
912ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
913ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
914ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
915ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
916ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
917ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
918ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
919ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
920
921ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
922ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
923ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
924ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
925ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
926ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
927ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
928ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
929
930#if ECB_GCC_VERSION(4,3)
931 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
932 #define ecb_bswap32(x) __builtin_bswap32 (x)
933 #define ecb_bswap64(x) __builtin_bswap64 (x)
934#else
935 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
936 ecb_function_ uint16_t
937 ecb_bswap16 (uint16_t x)
938 {
939 return ecb_rotl16 (x, 8);
940 }
941
942 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
943 ecb_function_ uint32_t
944 ecb_bswap32 (uint32_t x)
945 {
946 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
947 }
948
949 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
950 ecb_function_ uint64_t
951 ecb_bswap64 (uint64_t x)
952 {
953 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
954 }
955#endif
956
957#if ECB_GCC_VERSION(4,5)
958 #define ecb_unreachable() __builtin_unreachable ()
959#else
960 /* this seems to work fine, but gcc always emits a warning for it :/ */
961 ecb_inline void ecb_unreachable (void) ecb_noreturn;
962 ecb_inline void ecb_unreachable (void) { }
963#endif
964
965/* try to tell the compiler that some condition is definitely true */
966#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
967
968ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
969ecb_inline unsigned char
970ecb_byteorder_helper (void)
971{
972 /* the union code still generates code under pressure in gcc, */
973 /* but less than using pointers, and always seems to */
974 /* successfully return a constant. */
975 /* the reason why we have this horrible preprocessor mess */
976 /* is to avoid it in all cases, at least on common architectures */
977 /* or when using a recent enough gcc version (>= 4.6) */
978#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
979 return 0x44;
980#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
981 return 0x44;
982#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
983 return 0x11;
984#else
985 union
986 {
987 uint32_t i;
988 uint8_t c;
989 } u = { 0x11223344 };
990 return u.c;
991#endif
992}
993
994ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
995ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
996ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
997ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
998
999#if ECB_GCC_VERSION(3,0) || ECB_C99
1000 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1001#else
1002 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1003#endif
1004
1005#if __cplusplus
1006 template<typename T>
1007 static inline T ecb_div_rd (T val, T div)
1008 {
1009 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1010 }
1011 template<typename T>
1012 static inline T ecb_div_ru (T val, T div)
1013 {
1014 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1015 }
1016#else
1017 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1018 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1019#endif
1020
1021#if ecb_cplusplus_does_not_suck
1022 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1023 template<typename T, int N>
1024 static inline int ecb_array_length (const T (&arr)[N])
1025 {
1026 return N;
1027 }
1028#else
1029 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1030#endif
1031
1032/*******************************************************************************/
1033/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1034
1035/* basically, everything uses "ieee pure-endian" floating point numbers */
1036/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1037#if 0 \
1038 || __i386 || __i386__ \
1039 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1040 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1041 || defined __arm__ && defined __ARM_EABI__ \
1042 || defined __s390__ || defined __s390x__ \
1043 || defined __mips__ \
1044 || defined __alpha__ \
1045 || defined __hppa__ \
1046 || defined __ia64__ \
1047 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64
1048 #define ECB_STDFP 1
1049 #include <string.h> /* for memcpy */
1050#else
1051 #define ECB_STDFP 0
1052 #include <math.h> /* for frexp*, ldexp* */
1053#endif
1054
1055#ifndef ECB_NO_LIBM
1056
1057 /* convert a float to ieee single/binary32 */
1058 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1059 ecb_function_ uint32_t
1060 ecb_float_to_binary32 (float x)
1061 {
1062 uint32_t r;
1063
1064 #if ECB_STDFP
1065 memcpy (&r, &x, 4);
1066 #else
1067 /* slow emulation, works for anything but -0 */
1068 uint32_t m;
1069 int e;
1070
1071 if (x == 0e0f ) return 0x00000000U;
1072 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1073 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1074 if (x != x ) return 0x7fbfffffU;
1075
1076 m = frexpf (x, &e) * 0x1000000U;
1077
1078 r = m & 0x80000000U;
1079
1080 if (r)
1081 m = -m;
1082
1083 if (e <= -126)
1084 {
1085 m &= 0xffffffU;
1086 m >>= (-125 - e);
1087 e = -126;
1088 }
1089
1090 r |= (e + 126) << 23;
1091 r |= m & 0x7fffffU;
1092 #endif
1093
1094 return r;
1095 }
1096
1097 /* converts an ieee single/binary32 to a float */
1098 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1099 ecb_function_ float
1100 ecb_binary32_to_float (uint32_t x)
1101 {
1102 float r;
1103
1104 #if ECB_STDFP
1105 memcpy (&r, &x, 4);
1106 #else
1107 /* emulation, only works for normals and subnormals and +0 */
1108 int neg = x >> 31;
1109 int e = (x >> 23) & 0xffU;
1110
1111 x &= 0x7fffffU;
1112
1113 if (e)
1114 x |= 0x800000U;
1115 else
1116 e = 1;
1117
1118 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1119 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1120
1121 r = neg ? -r : r;
1122 #endif
1123
1124 return r;
1125 }
1126
1127 /* convert a double to ieee double/binary64 */
1128 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1129 ecb_function_ uint64_t
1130 ecb_double_to_binary64 (double x)
1131 {
1132 uint64_t r;
1133
1134 #if ECB_STDFP
1135 memcpy (&r, &x, 8);
1136 #else
1137 /* slow emulation, works for anything but -0 */
1138 uint64_t m;
1139 int e;
1140
1141 if (x == 0e0 ) return 0x0000000000000000U;
1142 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1143 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1144 if (x != x ) return 0X7ff7ffffffffffffU;
1145
1146 m = frexp (x, &e) * 0x20000000000000U;
1147
1148 r = m & 0x8000000000000000;;
1149
1150 if (r)
1151 m = -m;
1152
1153 if (e <= -1022)
1154 {
1155 m &= 0x1fffffffffffffU;
1156 m >>= (-1021 - e);
1157 e = -1022;
1158 }
1159
1160 r |= ((uint64_t)(e + 1022)) << 52;
1161 r |= m & 0xfffffffffffffU;
1162 #endif
1163
1164 return r;
1165 }
1166
1167 /* converts an ieee double/binary64 to a double */
1168 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1169 ecb_function_ double
1170 ecb_binary64_to_double (uint64_t x)
1171 {
1172 double r;
1173
1174 #if ECB_STDFP
1175 memcpy (&r, &x, 8);
1176 #else
1177 /* emulation, only works for normals and subnormals and +0 */
1178 int neg = x >> 63;
1179 int e = (x >> 52) & 0x7ffU;
1180
1181 x &= 0xfffffffffffffU;
1182
1183 if (e)
1184 x |= 0x10000000000000U;
1185 else
1186 e = 1;
1187
1188 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1189 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1190
1191 r = neg ? -r : r;
1192 #endif
1193
1194 return r;
1195 }
1196
1197#endif
1198
1199#endif
1200
1201/* ECB.H END */
1202
1203#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1204/* if your architecture doesn't need memory fences, e.g. because it is
1205 * single-cpu/core, or if you use libev in a project that doesn't use libev
1206 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1207 * libev, in which cases the memory fences become nops.
1208 * alternatively, you can remove this #error and link against libpthread,
1209 * which will then provide the memory fences.
1210 */
1211# error "memory fences not defined for your architecture, please report"
1212#endif
1213
1214#ifndef ECB_MEMORY_FENCE
1215# define ECB_MEMORY_FENCE do { } while (0)
1216# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1217# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1218#endif
1219
1220#define expect_false(cond) ecb_expect_false (cond)
1221#define expect_true(cond) ecb_expect_true (cond)
1222#define noinline ecb_noinline
1223
476#define inline_size static inline 1224#define inline_size ecb_inline
477 1225
478#if EV_FEATURE_CODE 1226#if EV_FEATURE_CODE
479# define inline_speed static inline 1227# define inline_speed ecb_inline
480#else 1228#else
481# define inline_speed static noinline 1229# define inline_speed static noinline
482#endif 1230#endif
483 1231
484#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1232#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
… …
523# include "ev_win32.c" 1271# include "ev_win32.c"
524#endif 1272#endif
525 1273
526/*****************************************************************************/ 1274/*****************************************************************************/
527 1275
1276/* define a suitable floor function (only used by periodics atm) */
1277
1278#if EV_USE_FLOOR
1279# include <math.h>
1280# define ev_floor(v) floor (v)
1281#else
1282
1283#include <float.h>
1284
1285/* a floor() replacement function, should be independent of ev_tstamp type */
1286static ev_tstamp noinline
1287ev_floor (ev_tstamp v)
1288{
1289 /* the choice of shift factor is not terribly important */
1290#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1291 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1292#else
1293 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1294#endif
1295
1296 /* argument too large for an unsigned long? */
1297 if (expect_false (v >= shift))
1298 {
1299 ev_tstamp f;
1300
1301 if (v == v - 1.)
1302 return v; /* very large number */
1303
1304 f = shift * ev_floor (v * (1. / shift));
1305 return f + ev_floor (v - f);
1306 }
1307
1308 /* special treatment for negative args? */
1309 if (expect_false (v < 0.))
1310 {
1311 ev_tstamp f = -ev_floor (-v);
1312
1313 return f - (f == v ? 0 : 1);
1314 }
1315
1316 /* fits into an unsigned long */
1317 return (unsigned long)v;
1318}
1319
1320#endif
1321
1322/*****************************************************************************/
1323
528#ifdef __linux 1324#ifdef __linux
529# include <sys/utsname.h> 1325# include <sys/utsname.h>
530#endif 1326#endif
531 1327
532static unsigned int noinline 1328static unsigned int noinline ecb_cold
533ev_linux_version (void) 1329ev_linux_version (void)
534{ 1330{
535#ifdef __linux 1331#ifdef __linux
536 unsigned int v = 0; 1332 unsigned int v = 0;
537 struct utsname buf; 1333 struct utsname buf;
… …
566} 1362}
567 1363
568/*****************************************************************************/ 1364/*****************************************************************************/
569 1365
570#if EV_AVOID_STDIO 1366#if EV_AVOID_STDIO
571static void noinline 1367static void noinline ecb_cold
572ev_printerr (const char *msg) 1368ev_printerr (const char *msg)
573{ 1369{
574 write (STDERR_FILENO, msg, strlen (msg)); 1370 write (STDERR_FILENO, msg, strlen (msg));
575} 1371}
576#endif 1372#endif
577 1373
578static void (*syserr_cb)(const char *msg); 1374static void (*syserr_cb)(const char *msg) EV_THROW;
579 1375
580void 1376void ecb_cold
581ev_set_syserr_cb (void (*cb)(const char *msg)) 1377ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
582{ 1378{
583 syserr_cb = cb; 1379 syserr_cb = cb;
584} 1380}
585 1381
586static void noinline 1382static void noinline ecb_cold
587ev_syserr (const char *msg) 1383ev_syserr (const char *msg)
588{ 1384{
589 if (!msg) 1385 if (!msg)
590 msg = "(libev) system error"; 1386 msg = "(libev) system error";
591 1387
… …
604 abort (); 1400 abort ();
605 } 1401 }
606} 1402}
607 1403
608static void * 1404static void *
609ev_realloc_emul (void *ptr, long size) 1405ev_realloc_emul (void *ptr, long size) EV_THROW
610{ 1406{
611#if __GLIBC__
612 return realloc (ptr, size);
613#else
614 /* some systems, notably openbsd and darwin, fail to properly 1407 /* some systems, notably openbsd and darwin, fail to properly
615 * implement realloc (x, 0) (as required by both ansi c-89 and 1408 * implement realloc (x, 0) (as required by both ansi c-89 and
616 * the single unix specification, so work around them here. 1409 * the single unix specification, so work around them here.
1410 * recently, also (at least) fedora and debian started breaking it,
1411 * despite documenting it otherwise.
617 */ 1412 */
618 1413
619 if (size) 1414 if (size)
620 return realloc (ptr, size); 1415 return realloc (ptr, size);
621 1416
622 free (ptr); 1417 free (ptr);
623 return 0; 1418 return 0;
624#endif
625} 1419}
626 1420
627static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1421static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
628 1422
629void 1423void ecb_cold
630ev_set_allocator (void *(*cb)(void *ptr, long size)) 1424ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
631{ 1425{
632 alloc = cb; 1426 alloc = cb;
633} 1427}
634 1428
635inline_speed void * 1429inline_speed void *
… …
723 #undef VAR 1517 #undef VAR
724 }; 1518 };
725 #include "ev_wrap.h" 1519 #include "ev_wrap.h"
726 1520
727 static struct ev_loop default_loop_struct; 1521 static struct ev_loop default_loop_struct;
728 struct ev_loop *ev_default_loop_ptr; 1522 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
729 1523
730#else 1524#else
731 1525
732 ev_tstamp ev_rt_now; 1526 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
733 #define VAR(name,decl) static decl; 1527 #define VAR(name,decl) static decl;
734 #include "ev_vars.h" 1528 #include "ev_vars.h"
735 #undef VAR 1529 #undef VAR
736 1530
737 static int ev_default_loop_ptr; 1531 static int ev_default_loop_ptr;
… …
752 1546
753/*****************************************************************************/ 1547/*****************************************************************************/
754 1548
755#ifndef EV_HAVE_EV_TIME 1549#ifndef EV_HAVE_EV_TIME
756ev_tstamp 1550ev_tstamp
757ev_time (void) 1551ev_time (void) EV_THROW
758{ 1552{
759#if EV_USE_REALTIME 1553#if EV_USE_REALTIME
760 if (expect_true (have_realtime)) 1554 if (expect_true (have_realtime))
761 { 1555 {
762 struct timespec ts; 1556 struct timespec ts;
… …
786 return ev_time (); 1580 return ev_time ();
787} 1581}
788 1582
789#if EV_MULTIPLICITY 1583#if EV_MULTIPLICITY
790ev_tstamp 1584ev_tstamp
791ev_now (EV_P) 1585ev_now (EV_P) EV_THROW
792{ 1586{
793 return ev_rt_now; 1587 return ev_rt_now;
794} 1588}
795#endif 1589#endif
796 1590
797void 1591void
798ev_sleep (ev_tstamp delay) 1592ev_sleep (ev_tstamp delay) EV_THROW
799{ 1593{
800 if (delay > 0.) 1594 if (delay > 0.)
801 { 1595 {
802#if EV_USE_NANOSLEEP 1596#if EV_USE_NANOSLEEP
803 struct timespec ts; 1597 struct timespec ts;
804 1598
805 EV_TS_SET (ts, delay); 1599 EV_TS_SET (ts, delay);
806 nanosleep (&ts, 0); 1600 nanosleep (&ts, 0);
807#elif defined(_WIN32) 1601#elif defined _WIN32
808 Sleep ((unsigned long)(delay * 1e3)); 1602 Sleep ((unsigned long)(delay * 1e3));
809#else 1603#else
810 struct timeval tv; 1604 struct timeval tv;
811 1605
812 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1606 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
816 select (0, 0, 0, 0, &tv); 1610 select (0, 0, 0, 0, &tv);
817#endif 1611#endif
818 } 1612 }
819} 1613}
820 1614
821inline_speed int
822ev_timeout_to_ms (ev_tstamp timeout)
823{
824 int ms = timeout * 1000. + .999999;
825
826 return expect_true (ms) ? ms : timeout < 1e-6 ? 0 : 1;
827}
828
829/*****************************************************************************/ 1615/*****************************************************************************/
830 1616
831#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1617#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
832 1618
833/* find a suitable new size for the given array, */ 1619/* find a suitable new size for the given array, */
… …
839 1625
840 do 1626 do
841 ncur <<= 1; 1627 ncur <<= 1;
842 while (cnt > ncur); 1628 while (cnt > ncur);
843 1629
844 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1630 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
845 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1631 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
846 { 1632 {
847 ncur *= elem; 1633 ncur *= elem;
848 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1634 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
849 ncur = ncur - sizeof (void *) * 4; 1635 ncur = ncur - sizeof (void *) * 4;
… …
851 } 1637 }
852 1638
853 return ncur; 1639 return ncur;
854} 1640}
855 1641
856static noinline void * 1642static void * noinline ecb_cold
857array_realloc (int elem, void *base, int *cur, int cnt) 1643array_realloc (int elem, void *base, int *cur, int cnt)
858{ 1644{
859 *cur = array_nextsize (elem, *cur, cnt); 1645 *cur = array_nextsize (elem, *cur, cnt);
860 return ev_realloc (base, elem * *cur); 1646 return ev_realloc (base, elem * *cur);
861} 1647}
… …
864 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1650 memset ((void *)(base), 0, sizeof (*(base)) * (count))
865 1651
866#define array_needsize(type,base,cur,cnt,init) \ 1652#define array_needsize(type,base,cur,cnt,init) \
867 if (expect_false ((cnt) > (cur))) \ 1653 if (expect_false ((cnt) > (cur))) \
868 { \ 1654 { \
869 int ocur_ = (cur); \ 1655 int ecb_unused ocur_ = (cur); \
870 (base) = (type *)array_realloc \ 1656 (base) = (type *)array_realloc \
871 (sizeof (type), (base), &(cur), (cnt)); \ 1657 (sizeof (type), (base), &(cur), (cnt)); \
872 init ((base) + (ocur_), (cur) - ocur_); \ 1658 init ((base) + (ocur_), (cur) - ocur_); \
873 } 1659 }
874 1660
… …
892pendingcb (EV_P_ ev_prepare *w, int revents) 1678pendingcb (EV_P_ ev_prepare *w, int revents)
893{ 1679{
894} 1680}
895 1681
896void noinline 1682void noinline
897ev_feed_event (EV_P_ void *w, int revents) 1683ev_feed_event (EV_P_ void *w, int revents) EV_THROW
898{ 1684{
899 W w_ = (W)w; 1685 W w_ = (W)w;
900 int pri = ABSPRI (w_); 1686 int pri = ABSPRI (w_);
901 1687
902 if (expect_false (w_->pending)) 1688 if (expect_false (w_->pending))
… …
906 w_->pending = ++pendingcnt [pri]; 1692 w_->pending = ++pendingcnt [pri];
907 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1693 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
908 pendings [pri][w_->pending - 1].w = w_; 1694 pendings [pri][w_->pending - 1].w = w_;
909 pendings [pri][w_->pending - 1].events = revents; 1695 pendings [pri][w_->pending - 1].events = revents;
910 } 1696 }
1697
1698 pendingpri = NUMPRI - 1;
911} 1699}
912 1700
913inline_speed void 1701inline_speed void
914feed_reverse (EV_P_ W w) 1702feed_reverse (EV_P_ W w)
915{ 1703{
… …
961 if (expect_true (!anfd->reify)) 1749 if (expect_true (!anfd->reify))
962 fd_event_nocheck (EV_A_ fd, revents); 1750 fd_event_nocheck (EV_A_ fd, revents);
963} 1751}
964 1752
965void 1753void
966ev_feed_fd_event (EV_P_ int fd, int revents) 1754ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
967{ 1755{
968 if (fd >= 0 && fd < anfdmax) 1756 if (fd >= 0 && fd < anfdmax)
969 fd_event_nocheck (EV_A_ fd, revents); 1757 fd_event_nocheck (EV_A_ fd, revents);
970} 1758}
971 1759
… …
974inline_size void 1762inline_size void
975fd_reify (EV_P) 1763fd_reify (EV_P)
976{ 1764{
977 int i; 1765 int i;
978 1766
1767#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1768 for (i = 0; i < fdchangecnt; ++i)
1769 {
1770 int fd = fdchanges [i];
1771 ANFD *anfd = anfds + fd;
1772
1773 if (anfd->reify & EV__IOFDSET && anfd->head)
1774 {
1775 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1776
1777 if (handle != anfd->handle)
1778 {
1779 unsigned long arg;
1780
1781 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1782
1783 /* handle changed, but fd didn't - we need to do it in two steps */
1784 backend_modify (EV_A_ fd, anfd->events, 0);
1785 anfd->events = 0;
1786 anfd->handle = handle;
1787 }
1788 }
1789 }
1790#endif
1791
979 for (i = 0; i < fdchangecnt; ++i) 1792 for (i = 0; i < fdchangecnt; ++i)
980 { 1793 {
981 int fd = fdchanges [i]; 1794 int fd = fdchanges [i];
982 ANFD *anfd = anfds + fd; 1795 ANFD *anfd = anfds + fd;
983 ev_io *w; 1796 ev_io *w;
… …
985 unsigned char o_events = anfd->events; 1798 unsigned char o_events = anfd->events;
986 unsigned char o_reify = anfd->reify; 1799 unsigned char o_reify = anfd->reify;
987 1800
988 anfd->reify = 0; 1801 anfd->reify = 0;
989 1802
990#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
991 if (o_reify & EV__IOFDSET)
992 {
993 unsigned long arg;
994 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
995 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
996 printf ("oi %d %x\n", fd, anfd->handle);//D
997 }
998#endif
999
1000 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 1803 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1001 { 1804 {
1002 anfd->events = 0; 1805 anfd->events = 0;
1003 1806
1004 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1807 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
1029 fdchanges [fdchangecnt - 1] = fd; 1832 fdchanges [fdchangecnt - 1] = fd;
1030 } 1833 }
1031} 1834}
1032 1835
1033/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1836/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1034inline_speed void 1837inline_speed void ecb_cold
1035fd_kill (EV_P_ int fd) 1838fd_kill (EV_P_ int fd)
1036{ 1839{
1037 ev_io *w; 1840 ev_io *w;
1038 1841
1039 while ((w = (ev_io *)anfds [fd].head)) 1842 while ((w = (ev_io *)anfds [fd].head))
… …
1042 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1845 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1043 } 1846 }
1044} 1847}
1045 1848
1046/* check whether the given fd is actually valid, for error recovery */ 1849/* check whether the given fd is actually valid, for error recovery */
1047inline_size int 1850inline_size int ecb_cold
1048fd_valid (int fd) 1851fd_valid (int fd)
1049{ 1852{
1050#ifdef _WIN32 1853#ifdef _WIN32
1051 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1854 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1052#else 1855#else
1053 return fcntl (fd, F_GETFD) != -1; 1856 return fcntl (fd, F_GETFD) != -1;
1054#endif 1857#endif
1055} 1858}
1056 1859
1057/* called on EBADF to verify fds */ 1860/* called on EBADF to verify fds */
1058static void noinline 1861static void noinline ecb_cold
1059fd_ebadf (EV_P) 1862fd_ebadf (EV_P)
1060{ 1863{
1061 int fd; 1864 int fd;
1062 1865
1063 for (fd = 0; fd < anfdmax; ++fd) 1866 for (fd = 0; fd < anfdmax; ++fd)
… …
1065 if (!fd_valid (fd) && errno == EBADF) 1868 if (!fd_valid (fd) && errno == EBADF)
1066 fd_kill (EV_A_ fd); 1869 fd_kill (EV_A_ fd);
1067} 1870}
1068 1871
1069/* called on ENOMEM in select/poll to kill some fds and retry */ 1872/* called on ENOMEM in select/poll to kill some fds and retry */
1070static void noinline 1873static void noinline ecb_cold
1071fd_enomem (EV_P) 1874fd_enomem (EV_P)
1072{ 1875{
1073 int fd; 1876 int fd;
1074 1877
1075 for (fd = anfdmax; fd--; ) 1878 for (fd = anfdmax; fd--; )
… …
1270 2073
1271/*****************************************************************************/ 2074/*****************************************************************************/
1272 2075
1273#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2076#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1274 2077
1275static void noinline 2078static void noinline ecb_cold
1276evpipe_init (EV_P) 2079evpipe_init (EV_P)
1277{ 2080{
1278 if (!ev_is_active (&pipe_w)) 2081 if (!ev_is_active (&pipe_w))
1279 { 2082 {
2083 int fds [2];
2084
1280# if EV_USE_EVENTFD 2085# if EV_USE_EVENTFD
2086 fds [0] = -1;
1281 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2087 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1282 if (evfd < 0 && errno == EINVAL) 2088 if (fds [1] < 0 && errno == EINVAL)
1283 evfd = eventfd (0, 0); 2089 fds [1] = eventfd (0, 0);
1284 2090
1285 if (evfd >= 0) 2091 if (fds [1] < 0)
2092# endif
1286 { 2093 {
2094 while (pipe (fds))
2095 ev_syserr ("(libev) error creating signal/async pipe");
2096
2097 fd_intern (fds [0]);
2098 }
2099
2100 fd_intern (fds [1]);
2101
1287 evpipe [0] = -1; 2102 evpipe [0] = fds [0];
1288 fd_intern (evfd); /* doing it twice doesn't hurt */ 2103
1289 ev_io_set (&pipe_w, evfd, EV_READ); 2104 if (evpipe [1] < 0)
2105 evpipe [1] = fds [1]; /* first call, set write fd */
2106 else
2107 {
2108 /* on subsequent calls, do not change evpipe [1] */
2109 /* so that evpipe_write can always rely on its value. */
2110 /* this branch does not do anything sensible on windows, */
2111 /* so must not be executed on windows */
2112
2113 dup2 (fds [1], evpipe [1]);
2114 close (fds [1]);
2115 }
2116
2117 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2118 ev_io_start (EV_A_ &pipe_w);
2119 ev_unref (EV_A); /* watcher should not keep loop alive */
2120 }
2121}
2122
2123inline_speed void
2124evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2125{
2126 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2127
2128 if (expect_true (*flag))
2129 return;
2130
2131 *flag = 1;
2132 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2133
2134 pipe_write_skipped = 1;
2135
2136 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2137
2138 if (pipe_write_wanted)
2139 {
2140 int old_errno;
2141
2142 pipe_write_skipped = 0;
2143 ECB_MEMORY_FENCE_RELEASE;
2144
2145 old_errno = errno; /* save errno because write will clobber it */
2146
2147#if EV_USE_EVENTFD
2148 if (evpipe [0] < 0)
2149 {
2150 uint64_t counter = 1;
2151 write (evpipe [1], &counter, sizeof (uint64_t));
1290 } 2152 }
1291 else 2153 else
1292# endif 2154#endif
1293 { 2155 {
1294 while (pipe (evpipe)) 2156#ifdef _WIN32
1295 ev_syserr ("(libev) error creating signal/async pipe"); 2157 WSABUF buf;
1296 2158 DWORD sent;
1297 fd_intern (evpipe [0]); 2159 buf.buf = &buf;
1298 fd_intern (evpipe [1]); 2160 buf.len = 1;
1299 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2161 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2162#else
2163 write (evpipe [1], &(evpipe [1]), 1);
2164#endif
1300 } 2165 }
1301
1302 ev_io_start (EV_A_ &pipe_w);
1303 ev_unref (EV_A); /* watcher should not keep loop alive */
1304 }
1305}
1306
1307inline_size void
1308evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1309{
1310 if (!*flag)
1311 {
1312 int old_errno = errno; /* save errno because write might clobber it */
1313 char dummy;
1314
1315 *flag = 1;
1316
1317#if EV_USE_EVENTFD
1318 if (evfd >= 0)
1319 {
1320 uint64_t counter = 1;
1321 write (evfd, &counter, sizeof (uint64_t));
1322 }
1323 else
1324#endif
1325 /* win32 people keep sending patches that change this write() to send() */
1326 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1327 /* so when you think this write should be a send instead, please find out */
1328 /* where your send() is from - it's definitely not the microsoft send, and */
1329 /* tell me. thank you. */
1330 write (evpipe [1], &dummy, 1);
1331 2166
1332 errno = old_errno; 2167 errno = old_errno;
1333 } 2168 }
1334} 2169}
1335 2170
… …
1338static void 2173static void
1339pipecb (EV_P_ ev_io *iow, int revents) 2174pipecb (EV_P_ ev_io *iow, int revents)
1340{ 2175{
1341 int i; 2176 int i;
1342 2177
2178 if (revents & EV_READ)
2179 {
1343#if EV_USE_EVENTFD 2180#if EV_USE_EVENTFD
1344 if (evfd >= 0) 2181 if (evpipe [0] < 0)
1345 { 2182 {
1346 uint64_t counter; 2183 uint64_t counter;
1347 read (evfd, &counter, sizeof (uint64_t)); 2184 read (evpipe [1], &counter, sizeof (uint64_t));
1348 } 2185 }
1349 else 2186 else
1350#endif 2187#endif
1351 { 2188 {
1352 char dummy; 2189 char dummy[4];
1353 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2190#ifdef _WIN32
2191 WSABUF buf;
2192 DWORD recvd;
2193 DWORD flags = 0;
2194 buf.buf = dummy;
2195 buf.len = sizeof (dummy);
2196 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2197#else
1354 read (evpipe [0], &dummy, 1); 2198 read (evpipe [0], &dummy, sizeof (dummy));
2199#endif
2200 }
1355 } 2201 }
2202
2203 pipe_write_skipped = 0;
2204
2205 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1356 2206
1357#if EV_SIGNAL_ENABLE 2207#if EV_SIGNAL_ENABLE
1358 if (sig_pending) 2208 if (sig_pending)
1359 { 2209 {
1360 sig_pending = 0; 2210 sig_pending = 0;
2211
2212 ECB_MEMORY_FENCE;
1361 2213
1362 for (i = EV_NSIG - 1; i--; ) 2214 for (i = EV_NSIG - 1; i--; )
1363 if (expect_false (signals [i].pending)) 2215 if (expect_false (signals [i].pending))
1364 ev_feed_signal_event (EV_A_ i + 1); 2216 ev_feed_signal_event (EV_A_ i + 1);
1365 } 2217 }
… …
1367 2219
1368#if EV_ASYNC_ENABLE 2220#if EV_ASYNC_ENABLE
1369 if (async_pending) 2221 if (async_pending)
1370 { 2222 {
1371 async_pending = 0; 2223 async_pending = 0;
2224
2225 ECB_MEMORY_FENCE;
1372 2226
1373 for (i = asynccnt; i--; ) 2227 for (i = asynccnt; i--; )
1374 if (asyncs [i]->sent) 2228 if (asyncs [i]->sent)
1375 { 2229 {
1376 asyncs [i]->sent = 0; 2230 asyncs [i]->sent = 0;
2231 ECB_MEMORY_FENCE_RELEASE;
1377 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2232 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1378 } 2233 }
1379 } 2234 }
1380#endif 2235#endif
1381} 2236}
1382 2237
1383/*****************************************************************************/ 2238/*****************************************************************************/
1384 2239
1385void 2240void
1386ev_feed_signal (int signum) 2241ev_feed_signal (int signum) EV_THROW
1387{ 2242{
1388#if EV_MULTIPLICITY 2243#if EV_MULTIPLICITY
2244 ECB_MEMORY_FENCE_ACQUIRE;
1389 EV_P = signals [signum - 1].loop; 2245 EV_P = signals [signum - 1].loop;
1390 2246
1391 if (!EV_A) 2247 if (!EV_A)
1392 return; 2248 return;
1393#endif 2249#endif
… …
1405 2261
1406 ev_feed_signal (signum); 2262 ev_feed_signal (signum);
1407} 2263}
1408 2264
1409void noinline 2265void noinline
1410ev_feed_signal_event (EV_P_ int signum) 2266ev_feed_signal_event (EV_P_ int signum) EV_THROW
1411{ 2267{
1412 WL w; 2268 WL w;
1413 2269
1414 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2270 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1415 return; 2271 return;
1416 2272
1417 --signum; 2273 --signum;
1418 2274
1419#if EV_MULTIPLICITY 2275#if EV_MULTIPLICITY
… …
1423 if (expect_false (signals [signum].loop != EV_A)) 2279 if (expect_false (signals [signum].loop != EV_A))
1424 return; 2280 return;
1425#endif 2281#endif
1426 2282
1427 signals [signum].pending = 0; 2283 signals [signum].pending = 0;
2284 ECB_MEMORY_FENCE_RELEASE;
1428 2285
1429 for (w = signals [signum].head; w; w = w->next) 2286 for (w = signals [signum].head; w; w = w->next)
1430 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2287 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1431} 2288}
1432 2289
… …
1530#endif 2387#endif
1531#if EV_USE_SELECT 2388#if EV_USE_SELECT
1532# include "ev_select.c" 2389# include "ev_select.c"
1533#endif 2390#endif
1534 2391
1535int 2392int ecb_cold
1536ev_version_major (void) 2393ev_version_major (void) EV_THROW
1537{ 2394{
1538 return EV_VERSION_MAJOR; 2395 return EV_VERSION_MAJOR;
1539} 2396}
1540 2397
1541int 2398int ecb_cold
1542ev_version_minor (void) 2399ev_version_minor (void) EV_THROW
1543{ 2400{
1544 return EV_VERSION_MINOR; 2401 return EV_VERSION_MINOR;
1545} 2402}
1546 2403
1547/* return true if we are running with elevated privileges and should ignore env variables */ 2404/* return true if we are running with elevated privileges and should ignore env variables */
1548int inline_size 2405int inline_size ecb_cold
1549enable_secure (void) 2406enable_secure (void)
1550{ 2407{
1551#ifdef _WIN32 2408#ifdef _WIN32
1552 return 0; 2409 return 0;
1553#else 2410#else
1554 return getuid () != geteuid () 2411 return getuid () != geteuid ()
1555 || getgid () != getegid (); 2412 || getgid () != getegid ();
1556#endif 2413#endif
1557} 2414}
1558 2415
1559unsigned int 2416unsigned int ecb_cold
1560ev_supported_backends (void) 2417ev_supported_backends (void) EV_THROW
1561{ 2418{
1562 unsigned int flags = 0; 2419 unsigned int flags = 0;
1563 2420
1564 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2421 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1565 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2422 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1568 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2425 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1569 2426
1570 return flags; 2427 return flags;
1571} 2428}
1572 2429
1573unsigned int 2430unsigned int ecb_cold
1574ev_recommended_backends (void) 2431ev_recommended_backends (void) EV_THROW
1575{ 2432{
1576 unsigned int flags = ev_supported_backends (); 2433 unsigned int flags = ev_supported_backends ();
1577 2434
1578#ifndef __NetBSD__ 2435#ifndef __NetBSD__
1579 /* kqueue is borked on everything but netbsd apparently */ 2436 /* kqueue is borked on everything but netbsd apparently */
… …
1590#endif 2447#endif
1591 2448
1592 return flags; 2449 return flags;
1593} 2450}
1594 2451
1595unsigned int 2452unsigned int ecb_cold
1596ev_embeddable_backends (void) 2453ev_embeddable_backends (void) EV_THROW
1597{ 2454{
1598 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2455 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1599 2456
1600 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2457 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1601 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ 2458 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
… …
1603 2460
1604 return flags; 2461 return flags;
1605} 2462}
1606 2463
1607unsigned int 2464unsigned int
1608ev_backend (EV_P) 2465ev_backend (EV_P) EV_THROW
1609{ 2466{
1610 return backend; 2467 return backend;
1611} 2468}
1612 2469
1613#if EV_FEATURE_API 2470#if EV_FEATURE_API
1614unsigned int 2471unsigned int
1615ev_iteration (EV_P) 2472ev_iteration (EV_P) EV_THROW
1616{ 2473{
1617 return loop_count; 2474 return loop_count;
1618} 2475}
1619 2476
1620unsigned int 2477unsigned int
1621ev_depth (EV_P) 2478ev_depth (EV_P) EV_THROW
1622{ 2479{
1623 return loop_depth; 2480 return loop_depth;
1624} 2481}
1625 2482
1626void 2483void
1627ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2484ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1628{ 2485{
1629 io_blocktime = interval; 2486 io_blocktime = interval;
1630} 2487}
1631 2488
1632void 2489void
1633ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2490ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1634{ 2491{
1635 timeout_blocktime = interval; 2492 timeout_blocktime = interval;
1636} 2493}
1637 2494
1638void 2495void
1639ev_set_userdata (EV_P_ void *data) 2496ev_set_userdata (EV_P_ void *data) EV_THROW
1640{ 2497{
1641 userdata = data; 2498 userdata = data;
1642} 2499}
1643 2500
1644void * 2501void *
1645ev_userdata (EV_P) 2502ev_userdata (EV_P) EV_THROW
1646{ 2503{
1647 return userdata; 2504 return userdata;
1648} 2505}
1649 2506
2507void
1650void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2508ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
1651{ 2509{
1652 invoke_cb = invoke_pending_cb; 2510 invoke_cb = invoke_pending_cb;
1653} 2511}
1654 2512
2513void
1655void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2514ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
1656{ 2515{
1657 release_cb = release; 2516 release_cb = release;
1658 acquire_cb = acquire; 2517 acquire_cb = acquire;
1659} 2518}
1660#endif 2519#endif
1661 2520
1662/* initialise a loop structure, must be zero-initialised */ 2521/* initialise a loop structure, must be zero-initialised */
1663static void noinline 2522static void noinline ecb_cold
1664loop_init (EV_P_ unsigned int flags) 2523loop_init (EV_P_ unsigned int flags) EV_THROW
1665{ 2524{
1666 if (!backend) 2525 if (!backend)
1667 { 2526 {
1668 origflags = flags; 2527 origflags = flags;
1669 2528
… …
1696 if (!(flags & EVFLAG_NOENV) 2555 if (!(flags & EVFLAG_NOENV)
1697 && !enable_secure () 2556 && !enable_secure ()
1698 && getenv ("LIBEV_FLAGS")) 2557 && getenv ("LIBEV_FLAGS"))
1699 flags = atoi (getenv ("LIBEV_FLAGS")); 2558 flags = atoi (getenv ("LIBEV_FLAGS"));
1700 2559
1701 ev_rt_now = ev_time (); 2560 ev_rt_now = ev_time ();
1702 mn_now = get_clock (); 2561 mn_now = get_clock ();
1703 now_floor = mn_now; 2562 now_floor = mn_now;
1704 rtmn_diff = ev_rt_now - mn_now; 2563 rtmn_diff = ev_rt_now - mn_now;
1705#if EV_FEATURE_API 2564#if EV_FEATURE_API
1706 invoke_cb = ev_invoke_pending; 2565 invoke_cb = ev_invoke_pending;
1707#endif 2566#endif
1708 2567
1709 io_blocktime = 0.; 2568 io_blocktime = 0.;
1710 timeout_blocktime = 0.; 2569 timeout_blocktime = 0.;
1711 backend = 0; 2570 backend = 0;
1712 backend_fd = -1; 2571 backend_fd = -1;
1713 sig_pending = 0; 2572 sig_pending = 0;
1714#if EV_ASYNC_ENABLE 2573#if EV_ASYNC_ENABLE
1715 async_pending = 0; 2574 async_pending = 0;
1716#endif 2575#endif
2576 pipe_write_skipped = 0;
2577 pipe_write_wanted = 0;
2578 evpipe [0] = -1;
2579 evpipe [1] = -1;
1717#if EV_USE_INOTIFY 2580#if EV_USE_INOTIFY
1718 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2581 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1719#endif 2582#endif
1720#if EV_USE_SIGNALFD 2583#if EV_USE_SIGNALFD
1721 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2584 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1722#endif 2585#endif
1723 2586
1724 if (!(flags & EVBACKEND_MASK)) 2587 if (!(flags & EVBACKEND_MASK))
1725 flags |= ev_recommended_backends (); 2588 flags |= ev_recommended_backends ();
1726 2589
… …
1751#endif 2614#endif
1752 } 2615 }
1753} 2616}
1754 2617
1755/* free up a loop structure */ 2618/* free up a loop structure */
1756void 2619void ecb_cold
1757ev_loop_destroy (EV_P) 2620ev_loop_destroy (EV_P)
1758{ 2621{
1759 int i; 2622 int i;
1760 2623
1761#if EV_MULTIPLICITY 2624#if EV_MULTIPLICITY
… …
1772 EV_INVOKE_PENDING; 2635 EV_INVOKE_PENDING;
1773 } 2636 }
1774#endif 2637#endif
1775 2638
1776#if EV_CHILD_ENABLE 2639#if EV_CHILD_ENABLE
1777 if (ev_is_active (&childev)) 2640 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
1778 { 2641 {
1779 ev_ref (EV_A); /* child watcher */ 2642 ev_ref (EV_A); /* child watcher */
1780 ev_signal_stop (EV_A_ &childev); 2643 ev_signal_stop (EV_A_ &childev);
1781 } 2644 }
1782#endif 2645#endif
… …
1784 if (ev_is_active (&pipe_w)) 2647 if (ev_is_active (&pipe_w))
1785 { 2648 {
1786 /*ev_ref (EV_A);*/ 2649 /*ev_ref (EV_A);*/
1787 /*ev_io_stop (EV_A_ &pipe_w);*/ 2650 /*ev_io_stop (EV_A_ &pipe_w);*/
1788 2651
1789#if EV_USE_EVENTFD
1790 if (evfd >= 0)
1791 close (evfd);
1792#endif
1793
1794 if (evpipe [0] >= 0)
1795 {
1796 EV_WIN32_CLOSE_FD (evpipe [0]); 2652 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1797 EV_WIN32_CLOSE_FD (evpipe [1]); 2653 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1798 }
1799 } 2654 }
1800 2655
1801#if EV_USE_SIGNALFD 2656#if EV_USE_SIGNALFD
1802 if (ev_is_active (&sigfd_w)) 2657 if (ev_is_active (&sigfd_w))
1803 close (sigfd); 2658 close (sigfd);
… …
1889#endif 2744#endif
1890#if EV_USE_INOTIFY 2745#if EV_USE_INOTIFY
1891 infy_fork (EV_A); 2746 infy_fork (EV_A);
1892#endif 2747#endif
1893 2748
2749#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1894 if (ev_is_active (&pipe_w)) 2750 if (ev_is_active (&pipe_w))
1895 { 2751 {
1896 /* this "locks" the handlers against writing to the pipe */ 2752 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1897 /* while we modify the fd vars */
1898 sig_pending = 1;
1899#if EV_ASYNC_ENABLE
1900 async_pending = 1;
1901#endif
1902 2753
1903 ev_ref (EV_A); 2754 ev_ref (EV_A);
1904 ev_io_stop (EV_A_ &pipe_w); 2755 ev_io_stop (EV_A_ &pipe_w);
1905 2756
1906#if EV_USE_EVENTFD
1907 if (evfd >= 0)
1908 close (evfd);
1909#endif
1910
1911 if (evpipe [0] >= 0) 2757 if (evpipe [0] >= 0)
1912 {
1913 EV_WIN32_CLOSE_FD (evpipe [0]); 2758 EV_WIN32_CLOSE_FD (evpipe [0]);
1914 EV_WIN32_CLOSE_FD (evpipe [1]);
1915 }
1916 2759
1917#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1918 evpipe_init (EV_A); 2760 evpipe_init (EV_A);
1919 /* now iterate over everything, in case we missed something */ 2761 /* iterate over everything, in case we missed something before */
1920 pipecb (EV_A_ &pipe_w, EV_READ); 2762 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1921#endif
1922 } 2763 }
2764#endif
1923 2765
1924 postfork = 0; 2766 postfork = 0;
1925} 2767}
1926 2768
1927#if EV_MULTIPLICITY 2769#if EV_MULTIPLICITY
1928 2770
1929struct ev_loop * 2771struct ev_loop * ecb_cold
1930ev_loop_new (unsigned int flags) 2772ev_loop_new (unsigned int flags) EV_THROW
1931{ 2773{
1932 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2774 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1933 2775
1934 memset (EV_A, 0, sizeof (struct ev_loop)); 2776 memset (EV_A, 0, sizeof (struct ev_loop));
1935 loop_init (EV_A_ flags); 2777 loop_init (EV_A_ flags);
… …
1942} 2784}
1943 2785
1944#endif /* multiplicity */ 2786#endif /* multiplicity */
1945 2787
1946#if EV_VERIFY 2788#if EV_VERIFY
1947static void noinline 2789static void noinline ecb_cold
1948verify_watcher (EV_P_ W w) 2790verify_watcher (EV_P_ W w)
1949{ 2791{
1950 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2792 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1951 2793
1952 if (w->pending) 2794 if (w->pending)
1953 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2795 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1954} 2796}
1955 2797
1956static void noinline 2798static void noinline ecb_cold
1957verify_heap (EV_P_ ANHE *heap, int N) 2799verify_heap (EV_P_ ANHE *heap, int N)
1958{ 2800{
1959 int i; 2801 int i;
1960 2802
1961 for (i = HEAP0; i < N + HEAP0; ++i) 2803 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1966 2808
1967 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2809 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1968 } 2810 }
1969} 2811}
1970 2812
1971static void noinline 2813static void noinline ecb_cold
1972array_verify (EV_P_ W *ws, int cnt) 2814array_verify (EV_P_ W *ws, int cnt)
1973{ 2815{
1974 while (cnt--) 2816 while (cnt--)
1975 { 2817 {
1976 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2818 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1978 } 2820 }
1979} 2821}
1980#endif 2822#endif
1981 2823
1982#if EV_FEATURE_API 2824#if EV_FEATURE_API
1983void 2825void ecb_cold
1984ev_verify (EV_P) 2826ev_verify (EV_P) EV_THROW
1985{ 2827{
1986#if EV_VERIFY 2828#if EV_VERIFY
1987 int i; 2829 int i;
1988 WL w; 2830 WL w, w2;
1989 2831
1990 assert (activecnt >= -1); 2832 assert (activecnt >= -1);
1991 2833
1992 assert (fdchangemax >= fdchangecnt); 2834 assert (fdchangemax >= fdchangecnt);
1993 for (i = 0; i < fdchangecnt; ++i) 2835 for (i = 0; i < fdchangecnt; ++i)
1994 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 2836 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1995 2837
1996 assert (anfdmax >= 0); 2838 assert (anfdmax >= 0);
1997 for (i = 0; i < anfdmax; ++i) 2839 for (i = 0; i < anfdmax; ++i)
2840 {
2841 int j = 0;
2842
1998 for (w = anfds [i].head; w; w = w->next) 2843 for (w = w2 = anfds [i].head; w; w = w->next)
1999 { 2844 {
2000 verify_watcher (EV_A_ (W)w); 2845 verify_watcher (EV_A_ (W)w);
2846
2847 if (j++ & 1)
2848 {
2849 assert (("libev: io watcher list contains a loop", w != w2));
2850 w2 = w2->next;
2851 }
2852
2001 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 2853 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2002 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 2854 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2003 } 2855 }
2856 }
2004 2857
2005 assert (timermax >= timercnt); 2858 assert (timermax >= timercnt);
2006 verify_heap (EV_A_ timers, timercnt); 2859 verify_heap (EV_A_ timers, timercnt);
2007 2860
2008#if EV_PERIODIC_ENABLE 2861#if EV_PERIODIC_ENABLE
… …
2054#endif 2907#endif
2055} 2908}
2056#endif 2909#endif
2057 2910
2058#if EV_MULTIPLICITY 2911#if EV_MULTIPLICITY
2059struct ev_loop * 2912struct ev_loop * ecb_cold
2060#else 2913#else
2061int 2914int
2062#endif 2915#endif
2063ev_default_loop (unsigned int flags) 2916ev_default_loop (unsigned int flags) EV_THROW
2064{ 2917{
2065 if (!ev_default_loop_ptr) 2918 if (!ev_default_loop_ptr)
2066 { 2919 {
2067#if EV_MULTIPLICITY 2920#if EV_MULTIPLICITY
2068 EV_P = ev_default_loop_ptr = &default_loop_struct; 2921 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2087 2940
2088 return ev_default_loop_ptr; 2941 return ev_default_loop_ptr;
2089} 2942}
2090 2943
2091void 2944void
2092ev_loop_fork (EV_P) 2945ev_loop_fork (EV_P) EV_THROW
2093{ 2946{
2094 postfork = 1; /* must be in line with ev_default_fork */ 2947 postfork = 1;
2095} 2948}
2096 2949
2097/*****************************************************************************/ 2950/*****************************************************************************/
2098 2951
2099void 2952void
… …
2101{ 2954{
2102 EV_CB_INVOKE ((W)w, revents); 2955 EV_CB_INVOKE ((W)w, revents);
2103} 2956}
2104 2957
2105unsigned int 2958unsigned int
2106ev_pending_count (EV_P) 2959ev_pending_count (EV_P) EV_THROW
2107{ 2960{
2108 int pri; 2961 int pri;
2109 unsigned int count = 0; 2962 unsigned int count = 0;
2110 2963
2111 for (pri = NUMPRI; pri--; ) 2964 for (pri = NUMPRI; pri--; )
… …
2115} 2968}
2116 2969
2117void noinline 2970void noinline
2118ev_invoke_pending (EV_P) 2971ev_invoke_pending (EV_P)
2119{ 2972{
2120 int pri; 2973 pendingpri = NUMPRI;
2121 2974
2122 for (pri = NUMPRI; pri--; ) 2975 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
2976 {
2977 --pendingpri;
2978
2123 while (pendingcnt [pri]) 2979 while (pendingcnt [pendingpri])
2124 { 2980 {
2125 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2981 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2126 2982
2127 p->w->pending = 0; 2983 p->w->pending = 0;
2128 EV_CB_INVOKE (p->w, p->events); 2984 EV_CB_INVOKE (p->w, p->events);
2129 EV_FREQUENT_CHECK; 2985 EV_FREQUENT_CHECK;
2130 } 2986 }
2987 }
2131} 2988}
2132 2989
2133#if EV_IDLE_ENABLE 2990#if EV_IDLE_ENABLE
2134/* make idle watchers pending. this handles the "call-idle */ 2991/* make idle watchers pending. this handles the "call-idle */
2135/* only when higher priorities are idle" logic */ 2992/* only when higher priorities are idle" logic */
… …
2193 } 3050 }
2194} 3051}
2195 3052
2196#if EV_PERIODIC_ENABLE 3053#if EV_PERIODIC_ENABLE
2197 3054
2198inline_speed 3055static void noinline
2199periodic_recalc (EV_P_ ev_periodic *w) 3056periodic_recalc (EV_P_ ev_periodic *w)
2200{ 3057{
2201 /* TODO: use slow but potentially more correct incremental algo, */ 3058 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2202 /* also do not rely on ceil */ 3059 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2203 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3060
3061 /* the above almost always errs on the low side */
3062 while (at <= ev_rt_now)
3063 {
3064 ev_tstamp nat = at + w->interval;
3065
3066 /* when resolution fails us, we use ev_rt_now */
3067 if (expect_false (nat == at))
3068 {
3069 at = ev_rt_now;
3070 break;
3071 }
3072
3073 at = nat;
3074 }
3075
3076 ev_at (w) = at;
2204} 3077}
2205 3078
2206/* make periodics pending */ 3079/* make periodics pending */
2207inline_size void 3080inline_size void
2208periodics_reify (EV_P) 3081periodics_reify (EV_P)
2209{ 3082{
2210 EV_FREQUENT_CHECK; 3083 EV_FREQUENT_CHECK;
2211 3084
2212 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3085 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2213 { 3086 {
2214 int feed_count = 0;
2215
2216 do 3087 do
2217 { 3088 {
2218 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3089 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2219 3090
2220 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3091 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2230 downheap (periodics, periodiccnt, HEAP0); 3101 downheap (periodics, periodiccnt, HEAP0);
2231 } 3102 }
2232 else if (w->interval) 3103 else if (w->interval)
2233 { 3104 {
2234 periodic_recalc (EV_A_ w); 3105 periodic_recalc (EV_A_ w);
2235
2236 /* if next trigger time is not sufficiently in the future, put it there */
2237 /* this might happen because of floating point inexactness */
2238 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2239 {
2240 ev_at (w) += w->interval;
2241
2242 /* if interval is unreasonably low we might still have a time in the past */
2243 /* so correct this. this will make the periodic very inexact, but the user */
2244 /* has effectively asked to get triggered more often than possible */
2245 if (ev_at (w) < ev_rt_now)
2246 ev_at (w) = ev_rt_now;
2247 }
2248
2249 ANHE_at_cache (periodics [HEAP0]); 3106 ANHE_at_cache (periodics [HEAP0]);
2250 downheap (periodics, periodiccnt, HEAP0); 3107 downheap (periodics, periodiccnt, HEAP0);
2251 } 3108 }
2252 else 3109 else
2253 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3110 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2261 } 3118 }
2262} 3119}
2263 3120
2264/* simply recalculate all periodics */ 3121/* simply recalculate all periodics */
2265/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3122/* TODO: maybe ensure that at least one event happens when jumping forward? */
2266static void noinline 3123static void noinline ecb_cold
2267periodics_reschedule (EV_P) 3124periodics_reschedule (EV_P)
2268{ 3125{
2269 int i; 3126 int i;
2270 3127
2271 /* adjust periodics after time jump */ 3128 /* adjust periodics after time jump */
… …
2284 reheap (periodics, periodiccnt); 3141 reheap (periodics, periodiccnt);
2285} 3142}
2286#endif 3143#endif
2287 3144
2288/* adjust all timers by a given offset */ 3145/* adjust all timers by a given offset */
2289static void noinline 3146static void noinline ecb_cold
2290timers_reschedule (EV_P_ ev_tstamp adjust) 3147timers_reschedule (EV_P_ ev_tstamp adjust)
2291{ 3148{
2292 int i; 3149 int i;
2293 3150
2294 for (i = 0; i < timercnt; ++i) 3151 for (i = 0; i < timercnt; ++i)
… …
2331 * doesn't hurt either as we only do this on time-jumps or 3188 * doesn't hurt either as we only do this on time-jumps or
2332 * in the unlikely event of having been preempted here. 3189 * in the unlikely event of having been preempted here.
2333 */ 3190 */
2334 for (i = 4; --i; ) 3191 for (i = 4; --i; )
2335 { 3192 {
3193 ev_tstamp diff;
2336 rtmn_diff = ev_rt_now - mn_now; 3194 rtmn_diff = ev_rt_now - mn_now;
2337 3195
3196 diff = odiff - rtmn_diff;
3197
2338 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3198 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2339 return; /* all is well */ 3199 return; /* all is well */
2340 3200
2341 ev_rt_now = ev_time (); 3201 ev_rt_now = ev_time ();
2342 mn_now = get_clock (); 3202 mn_now = get_clock ();
2343 now_floor = mn_now; 3203 now_floor = mn_now;
… …
2365 3225
2366 mn_now = ev_rt_now; 3226 mn_now = ev_rt_now;
2367 } 3227 }
2368} 3228}
2369 3229
2370void 3230int
2371ev_run (EV_P_ int flags) 3231ev_run (EV_P_ int flags)
2372{ 3232{
2373#if EV_FEATURE_API 3233#if EV_FEATURE_API
2374 ++loop_depth; 3234 ++loop_depth;
2375#endif 3235#endif
… …
2433 ev_tstamp prev_mn_now = mn_now; 3293 ev_tstamp prev_mn_now = mn_now;
2434 3294
2435 /* update time to cancel out callback processing overhead */ 3295 /* update time to cancel out callback processing overhead */
2436 time_update (EV_A_ 1e100); 3296 time_update (EV_A_ 1e100);
2437 3297
3298 /* from now on, we want a pipe-wake-up */
3299 pipe_write_wanted = 1;
3300
3301 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3302
2438 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3303 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2439 { 3304 {
2440 waittime = MAX_BLOCKTIME; 3305 waittime = MAX_BLOCKTIME;
2441 3306
2442 if (timercnt) 3307 if (timercnt)
2443 { 3308 {
2444 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3309 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2445 if (waittime > to) waittime = to; 3310 if (waittime > to) waittime = to;
2446 } 3311 }
2447 3312
2448#if EV_PERIODIC_ENABLE 3313#if EV_PERIODIC_ENABLE
2449 if (periodiccnt) 3314 if (periodiccnt)
2450 { 3315 {
2451 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3316 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2452 if (waittime > to) waittime = to; 3317 if (waittime > to) waittime = to;
2453 } 3318 }
2454#endif 3319#endif
2455 3320
2456 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3321 /* don't let timeouts decrease the waittime below timeout_blocktime */
2457 if (expect_false (waittime < timeout_blocktime)) 3322 if (expect_false (waittime < timeout_blocktime))
2458 waittime = timeout_blocktime; 3323 waittime = timeout_blocktime;
3324
3325 /* at this point, we NEED to wait, so we have to ensure */
3326 /* to pass a minimum nonzero value to the backend */
3327 if (expect_false (waittime < backend_mintime))
3328 waittime = backend_mintime;
2459 3329
2460 /* extra check because io_blocktime is commonly 0 */ 3330 /* extra check because io_blocktime is commonly 0 */
2461 if (expect_false (io_blocktime)) 3331 if (expect_false (io_blocktime))
2462 { 3332 {
2463 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3333 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2464 3334
2465 if (sleeptime > waittime - backend_fudge) 3335 if (sleeptime > waittime - backend_mintime)
2466 sleeptime = waittime - backend_fudge; 3336 sleeptime = waittime - backend_mintime;
2467 3337
2468 if (expect_true (sleeptime > 0.)) 3338 if (expect_true (sleeptime > 0.))
2469 { 3339 {
2470 ev_sleep (sleeptime); 3340 ev_sleep (sleeptime);
2471 waittime -= sleeptime; 3341 waittime -= sleeptime;
… …
2478#endif 3348#endif
2479 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3349 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2480 backend_poll (EV_A_ waittime); 3350 backend_poll (EV_A_ waittime);
2481 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3351 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2482 3352
3353 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3354
3355 ECB_MEMORY_FENCE_ACQUIRE;
3356 if (pipe_write_skipped)
3357 {
3358 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3359 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3360 }
3361
3362
2483 /* update ev_rt_now, do magic */ 3363 /* update ev_rt_now, do magic */
2484 time_update (EV_A_ waittime + sleeptime); 3364 time_update (EV_A_ waittime + sleeptime);
2485 } 3365 }
2486 3366
2487 /* queue pending timers and reschedule them */ 3367 /* queue pending timers and reschedule them */
… …
2513 loop_done = EVBREAK_CANCEL; 3393 loop_done = EVBREAK_CANCEL;
2514 3394
2515#if EV_FEATURE_API 3395#if EV_FEATURE_API
2516 --loop_depth; 3396 --loop_depth;
2517#endif 3397#endif
3398
3399 return activecnt;
2518} 3400}
2519 3401
2520void 3402void
2521ev_break (EV_P_ int how) 3403ev_break (EV_P_ int how) EV_THROW
2522{ 3404{
2523 loop_done = how; 3405 loop_done = how;
2524} 3406}
2525 3407
2526void 3408void
2527ev_ref (EV_P) 3409ev_ref (EV_P) EV_THROW
2528{ 3410{
2529 ++activecnt; 3411 ++activecnt;
2530} 3412}
2531 3413
2532void 3414void
2533ev_unref (EV_P) 3415ev_unref (EV_P) EV_THROW
2534{ 3416{
2535 --activecnt; 3417 --activecnt;
2536} 3418}
2537 3419
2538void 3420void
2539ev_now_update (EV_P) 3421ev_now_update (EV_P) EV_THROW
2540{ 3422{
2541 time_update (EV_A_ 1e100); 3423 time_update (EV_A_ 1e100);
2542} 3424}
2543 3425
2544void 3426void
2545ev_suspend (EV_P) 3427ev_suspend (EV_P) EV_THROW
2546{ 3428{
2547 ev_now_update (EV_A); 3429 ev_now_update (EV_A);
2548} 3430}
2549 3431
2550void 3432void
2551ev_resume (EV_P) 3433ev_resume (EV_P) EV_THROW
2552{ 3434{
2553 ev_tstamp mn_prev = mn_now; 3435 ev_tstamp mn_prev = mn_now;
2554 3436
2555 ev_now_update (EV_A); 3437 ev_now_update (EV_A);
2556 timers_reschedule (EV_A_ mn_now - mn_prev); 3438 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2595 w->pending = 0; 3477 w->pending = 0;
2596 } 3478 }
2597} 3479}
2598 3480
2599int 3481int
2600ev_clear_pending (EV_P_ void *w) 3482ev_clear_pending (EV_P_ void *w) EV_THROW
2601{ 3483{
2602 W w_ = (W)w; 3484 W w_ = (W)w;
2603 int pending = w_->pending; 3485 int pending = w_->pending;
2604 3486
2605 if (expect_true (pending)) 3487 if (expect_true (pending))
… …
2638} 3520}
2639 3521
2640/*****************************************************************************/ 3522/*****************************************************************************/
2641 3523
2642void noinline 3524void noinline
2643ev_io_start (EV_P_ ev_io *w) 3525ev_io_start (EV_P_ ev_io *w) EV_THROW
2644{ 3526{
2645 int fd = w->fd; 3527 int fd = w->fd;
2646 3528
2647 if (expect_false (ev_is_active (w))) 3529 if (expect_false (ev_is_active (w)))
2648 return; 3530 return;
… …
2654 3536
2655 ev_start (EV_A_ (W)w, 1); 3537 ev_start (EV_A_ (W)w, 1);
2656 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3538 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2657 wlist_add (&anfds[fd].head, (WL)w); 3539 wlist_add (&anfds[fd].head, (WL)w);
2658 3540
3541 /* common bug, apparently */
3542 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3543
2659 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3544 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2660 w->events &= ~EV__IOFDSET; 3545 w->events &= ~EV__IOFDSET;
2661 3546
2662 EV_FREQUENT_CHECK; 3547 EV_FREQUENT_CHECK;
2663} 3548}
2664 3549
2665void noinline 3550void noinline
2666ev_io_stop (EV_P_ ev_io *w) 3551ev_io_stop (EV_P_ ev_io *w) EV_THROW
2667{ 3552{
2668 clear_pending (EV_A_ (W)w); 3553 clear_pending (EV_A_ (W)w);
2669 if (expect_false (!ev_is_active (w))) 3554 if (expect_false (!ev_is_active (w)))
2670 return; 3555 return;
2671 3556
… …
2680 3565
2681 EV_FREQUENT_CHECK; 3566 EV_FREQUENT_CHECK;
2682} 3567}
2683 3568
2684void noinline 3569void noinline
2685ev_timer_start (EV_P_ ev_timer *w) 3570ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2686{ 3571{
2687 if (expect_false (ev_is_active (w))) 3572 if (expect_false (ev_is_active (w)))
2688 return; 3573 return;
2689 3574
2690 ev_at (w) += mn_now; 3575 ev_at (w) += mn_now;
… …
2704 3589
2705 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3590 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2706} 3591}
2707 3592
2708void noinline 3593void noinline
2709ev_timer_stop (EV_P_ ev_timer *w) 3594ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2710{ 3595{
2711 clear_pending (EV_A_ (W)w); 3596 clear_pending (EV_A_ (W)w);
2712 if (expect_false (!ev_is_active (w))) 3597 if (expect_false (!ev_is_active (w)))
2713 return; 3598 return;
2714 3599
… …
2734 3619
2735 EV_FREQUENT_CHECK; 3620 EV_FREQUENT_CHECK;
2736} 3621}
2737 3622
2738void noinline 3623void noinline
2739ev_timer_again (EV_P_ ev_timer *w) 3624ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2740{ 3625{
2741 EV_FREQUENT_CHECK; 3626 EV_FREQUENT_CHECK;
3627
3628 clear_pending (EV_A_ (W)w);
2742 3629
2743 if (ev_is_active (w)) 3630 if (ev_is_active (w))
2744 { 3631 {
2745 if (w->repeat) 3632 if (w->repeat)
2746 { 3633 {
… …
2759 3646
2760 EV_FREQUENT_CHECK; 3647 EV_FREQUENT_CHECK;
2761} 3648}
2762 3649
2763ev_tstamp 3650ev_tstamp
2764ev_timer_remaining (EV_P_ ev_timer *w) 3651ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
2765{ 3652{
2766 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 3653 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2767} 3654}
2768 3655
2769#if EV_PERIODIC_ENABLE 3656#if EV_PERIODIC_ENABLE
2770void noinline 3657void noinline
2771ev_periodic_start (EV_P_ ev_periodic *w) 3658ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2772{ 3659{
2773 if (expect_false (ev_is_active (w))) 3660 if (expect_false (ev_is_active (w)))
2774 return; 3661 return;
2775 3662
2776 if (w->reschedule_cb) 3663 if (w->reschedule_cb)
… …
2796 3683
2797 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3684 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2798} 3685}
2799 3686
2800void noinline 3687void noinline
2801ev_periodic_stop (EV_P_ ev_periodic *w) 3688ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2802{ 3689{
2803 clear_pending (EV_A_ (W)w); 3690 clear_pending (EV_A_ (W)w);
2804 if (expect_false (!ev_is_active (w))) 3691 if (expect_false (!ev_is_active (w)))
2805 return; 3692 return;
2806 3693
… …
2824 3711
2825 EV_FREQUENT_CHECK; 3712 EV_FREQUENT_CHECK;
2826} 3713}
2827 3714
2828void noinline 3715void noinline
2829ev_periodic_again (EV_P_ ev_periodic *w) 3716ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2830{ 3717{
2831 /* TODO: use adjustheap and recalculation */ 3718 /* TODO: use adjustheap and recalculation */
2832 ev_periodic_stop (EV_A_ w); 3719 ev_periodic_stop (EV_A_ w);
2833 ev_periodic_start (EV_A_ w); 3720 ev_periodic_start (EV_A_ w);
2834} 3721}
… …
2839#endif 3726#endif
2840 3727
2841#if EV_SIGNAL_ENABLE 3728#if EV_SIGNAL_ENABLE
2842 3729
2843void noinline 3730void noinline
2844ev_signal_start (EV_P_ ev_signal *w) 3731ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2845{ 3732{
2846 if (expect_false (ev_is_active (w))) 3733 if (expect_false (ev_is_active (w)))
2847 return; 3734 return;
2848 3735
2849 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 3736 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
2851#if EV_MULTIPLICITY 3738#if EV_MULTIPLICITY
2852 assert (("libev: a signal must not be attached to two different loops", 3739 assert (("libev: a signal must not be attached to two different loops",
2853 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 3740 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2854 3741
2855 signals [w->signum - 1].loop = EV_A; 3742 signals [w->signum - 1].loop = EV_A;
3743 ECB_MEMORY_FENCE_RELEASE;
2856#endif 3744#endif
2857 3745
2858 EV_FREQUENT_CHECK; 3746 EV_FREQUENT_CHECK;
2859 3747
2860#if EV_USE_SIGNALFD 3748#if EV_USE_SIGNALFD
… …
2920 3808
2921 EV_FREQUENT_CHECK; 3809 EV_FREQUENT_CHECK;
2922} 3810}
2923 3811
2924void noinline 3812void noinline
2925ev_signal_stop (EV_P_ ev_signal *w) 3813ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2926{ 3814{
2927 clear_pending (EV_A_ (W)w); 3815 clear_pending (EV_A_ (W)w);
2928 if (expect_false (!ev_is_active (w))) 3816 if (expect_false (!ev_is_active (w)))
2929 return; 3817 return;
2930 3818
… …
2961#endif 3849#endif
2962 3850
2963#if EV_CHILD_ENABLE 3851#if EV_CHILD_ENABLE
2964 3852
2965void 3853void
2966ev_child_start (EV_P_ ev_child *w) 3854ev_child_start (EV_P_ ev_child *w) EV_THROW
2967{ 3855{
2968#if EV_MULTIPLICITY 3856#if EV_MULTIPLICITY
2969 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3857 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2970#endif 3858#endif
2971 if (expect_false (ev_is_active (w))) 3859 if (expect_false (ev_is_active (w)))
… …
2978 3866
2979 EV_FREQUENT_CHECK; 3867 EV_FREQUENT_CHECK;
2980} 3868}
2981 3869
2982void 3870void
2983ev_child_stop (EV_P_ ev_child *w) 3871ev_child_stop (EV_P_ ev_child *w) EV_THROW
2984{ 3872{
2985 clear_pending (EV_A_ (W)w); 3873 clear_pending (EV_A_ (W)w);
2986 if (expect_false (!ev_is_active (w))) 3874 if (expect_false (!ev_is_active (w)))
2987 return; 3875 return;
2988 3876
… …
3015# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 3903# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3016 3904
3017static void noinline 3905static void noinline
3018infy_add (EV_P_ ev_stat *w) 3906infy_add (EV_P_ ev_stat *w)
3019{ 3907{
3020 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD); 3908 w->wd = inotify_add_watch (fs_fd, w->path,
3909 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
3910 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
3911 | IN_DONT_FOLLOW | IN_MASK_ADD);
3021 3912
3022 if (w->wd >= 0) 3913 if (w->wd >= 0)
3023 { 3914 {
3024 struct statfs sfs; 3915 struct statfs sfs;
3025 3916
… …
3029 3920
3030 if (!fs_2625) 3921 if (!fs_2625)
3031 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 3922 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3032 else if (!statfs (w->path, &sfs) 3923 else if (!statfs (w->path, &sfs)
3033 && (sfs.f_type == 0x1373 /* devfs */ 3924 && (sfs.f_type == 0x1373 /* devfs */
3925 || sfs.f_type == 0x4006 /* fat */
3926 || sfs.f_type == 0x4d44 /* msdos */
3034 || sfs.f_type == 0xEF53 /* ext2/3 */ 3927 || sfs.f_type == 0xEF53 /* ext2/3 */
3928 || sfs.f_type == 0x72b6 /* jffs2 */
3929 || sfs.f_type == 0x858458f6 /* ramfs */
3930 || sfs.f_type == 0x5346544e /* ntfs */
3035 || sfs.f_type == 0x3153464a /* jfs */ 3931 || sfs.f_type == 0x3153464a /* jfs */
3932 || sfs.f_type == 0x9123683e /* btrfs */
3036 || sfs.f_type == 0x52654973 /* reiser3 */ 3933 || sfs.f_type == 0x52654973 /* reiser3 */
3037 || sfs.f_type == 0x01021994 /* tempfs */ 3934 || sfs.f_type == 0x01021994 /* tmpfs */
3038 || sfs.f_type == 0x58465342 /* xfs */)) 3935 || sfs.f_type == 0x58465342 /* xfs */))
3039 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 3936 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3040 else 3937 else
3041 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 3938 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3042 } 3939 }
… …
3063 if (!pend || pend == path) 3960 if (!pend || pend == path)
3064 break; 3961 break;
3065 3962
3066 *pend = 0; 3963 *pend = 0;
3067 w->wd = inotify_add_watch (fs_fd, path, mask); 3964 w->wd = inotify_add_watch (fs_fd, path, mask);
3068 } 3965 }
3069 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3966 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3070 } 3967 }
3071 } 3968 }
3072 3969
3073 if (w->wd >= 0) 3970 if (w->wd >= 0)
… …
3140 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4037 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3141 ofs += sizeof (struct inotify_event) + ev->len; 4038 ofs += sizeof (struct inotify_event) + ev->len;
3142 } 4039 }
3143} 4040}
3144 4041
3145inline_size void 4042inline_size void ecb_cold
3146ev_check_2625 (EV_P) 4043ev_check_2625 (EV_P)
3147{ 4044{
3148 /* kernels < 2.6.25 are borked 4045 /* kernels < 2.6.25 are borked
3149 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4046 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3150 */ 4047 */
… …
3155} 4052}
3156 4053
3157inline_size int 4054inline_size int
3158infy_newfd (void) 4055infy_newfd (void)
3159{ 4056{
3160#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4057#if defined IN_CLOEXEC && defined IN_NONBLOCK
3161 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4058 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3162 if (fd >= 0) 4059 if (fd >= 0)
3163 return fd; 4060 return fd;
3164#endif 4061#endif
3165 return inotify_init (); 4062 return inotify_init ();
… …
3240#else 4137#else
3241# define EV_LSTAT(p,b) lstat (p, b) 4138# define EV_LSTAT(p,b) lstat (p, b)
3242#endif 4139#endif
3243 4140
3244void 4141void
3245ev_stat_stat (EV_P_ ev_stat *w) 4142ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3246{ 4143{
3247 if (lstat (w->path, &w->attr) < 0) 4144 if (lstat (w->path, &w->attr) < 0)
3248 w->attr.st_nlink = 0; 4145 w->attr.st_nlink = 0;
3249 else if (!w->attr.st_nlink) 4146 else if (!w->attr.st_nlink)
3250 w->attr.st_nlink = 1; 4147 w->attr.st_nlink = 1;
… …
3289 ev_feed_event (EV_A_ w, EV_STAT); 4186 ev_feed_event (EV_A_ w, EV_STAT);
3290 } 4187 }
3291} 4188}
3292 4189
3293void 4190void
3294ev_stat_start (EV_P_ ev_stat *w) 4191ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3295{ 4192{
3296 if (expect_false (ev_is_active (w))) 4193 if (expect_false (ev_is_active (w)))
3297 return; 4194 return;
3298 4195
3299 ev_stat_stat (EV_A_ w); 4196 ev_stat_stat (EV_A_ w);
… …
3320 4217
3321 EV_FREQUENT_CHECK; 4218 EV_FREQUENT_CHECK;
3322} 4219}
3323 4220
3324void 4221void
3325ev_stat_stop (EV_P_ ev_stat *w) 4222ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3326{ 4223{
3327 clear_pending (EV_A_ (W)w); 4224 clear_pending (EV_A_ (W)w);
3328 if (expect_false (!ev_is_active (w))) 4225 if (expect_false (!ev_is_active (w)))
3329 return; 4226 return;
3330 4227
… …
3346} 4243}
3347#endif 4244#endif
3348 4245
3349#if EV_IDLE_ENABLE 4246#if EV_IDLE_ENABLE
3350void 4247void
3351ev_idle_start (EV_P_ ev_idle *w) 4248ev_idle_start (EV_P_ ev_idle *w) EV_THROW
3352{ 4249{
3353 if (expect_false (ev_is_active (w))) 4250 if (expect_false (ev_is_active (w)))
3354 return; 4251 return;
3355 4252
3356 pri_adjust (EV_A_ (W)w); 4253 pri_adjust (EV_A_ (W)w);
… …
3369 4266
3370 EV_FREQUENT_CHECK; 4267 EV_FREQUENT_CHECK;
3371} 4268}
3372 4269
3373void 4270void
3374ev_idle_stop (EV_P_ ev_idle *w) 4271ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3375{ 4272{
3376 clear_pending (EV_A_ (W)w); 4273 clear_pending (EV_A_ (W)w);
3377 if (expect_false (!ev_is_active (w))) 4274 if (expect_false (!ev_is_active (w)))
3378 return; 4275 return;
3379 4276
… …
3393} 4290}
3394#endif 4291#endif
3395 4292
3396#if EV_PREPARE_ENABLE 4293#if EV_PREPARE_ENABLE
3397void 4294void
3398ev_prepare_start (EV_P_ ev_prepare *w) 4295ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
3399{ 4296{
3400 if (expect_false (ev_is_active (w))) 4297 if (expect_false (ev_is_active (w)))
3401 return; 4298 return;
3402 4299
3403 EV_FREQUENT_CHECK; 4300 EV_FREQUENT_CHECK;
… …
3408 4305
3409 EV_FREQUENT_CHECK; 4306 EV_FREQUENT_CHECK;
3410} 4307}
3411 4308
3412void 4309void
3413ev_prepare_stop (EV_P_ ev_prepare *w) 4310ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
3414{ 4311{
3415 clear_pending (EV_A_ (W)w); 4312 clear_pending (EV_A_ (W)w);
3416 if (expect_false (!ev_is_active (w))) 4313 if (expect_false (!ev_is_active (w)))
3417 return; 4314 return;
3418 4315
… …
3431} 4328}
3432#endif 4329#endif
3433 4330
3434#if EV_CHECK_ENABLE 4331#if EV_CHECK_ENABLE
3435void 4332void
3436ev_check_start (EV_P_ ev_check *w) 4333ev_check_start (EV_P_ ev_check *w) EV_THROW
3437{ 4334{
3438 if (expect_false (ev_is_active (w))) 4335 if (expect_false (ev_is_active (w)))
3439 return; 4336 return;
3440 4337
3441 EV_FREQUENT_CHECK; 4338 EV_FREQUENT_CHECK;
… …
3446 4343
3447 EV_FREQUENT_CHECK; 4344 EV_FREQUENT_CHECK;
3448} 4345}
3449 4346
3450void 4347void
3451ev_check_stop (EV_P_ ev_check *w) 4348ev_check_stop (EV_P_ ev_check *w) EV_THROW
3452{ 4349{
3453 clear_pending (EV_A_ (W)w); 4350 clear_pending (EV_A_ (W)w);
3454 if (expect_false (!ev_is_active (w))) 4351 if (expect_false (!ev_is_active (w)))
3455 return; 4352 return;
3456 4353
… …
3469} 4366}
3470#endif 4367#endif
3471 4368
3472#if EV_EMBED_ENABLE 4369#if EV_EMBED_ENABLE
3473void noinline 4370void noinline
3474ev_embed_sweep (EV_P_ ev_embed *w) 4371ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
3475{ 4372{
3476 ev_run (w->other, EVRUN_NOWAIT); 4373 ev_run (w->other, EVRUN_NOWAIT);
3477} 4374}
3478 4375
3479static void 4376static void
… …
3527 ev_idle_stop (EV_A_ idle); 4424 ev_idle_stop (EV_A_ idle);
3528} 4425}
3529#endif 4426#endif
3530 4427
3531void 4428void
3532ev_embed_start (EV_P_ ev_embed *w) 4429ev_embed_start (EV_P_ ev_embed *w) EV_THROW
3533{ 4430{
3534 if (expect_false (ev_is_active (w))) 4431 if (expect_false (ev_is_active (w)))
3535 return; 4432 return;
3536 4433
3537 { 4434 {
… …
3558 4455
3559 EV_FREQUENT_CHECK; 4456 EV_FREQUENT_CHECK;
3560} 4457}
3561 4458
3562void 4459void
3563ev_embed_stop (EV_P_ ev_embed *w) 4460ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
3564{ 4461{
3565 clear_pending (EV_A_ (W)w); 4462 clear_pending (EV_A_ (W)w);
3566 if (expect_false (!ev_is_active (w))) 4463 if (expect_false (!ev_is_active (w)))
3567 return; 4464 return;
3568 4465
… …
3578} 4475}
3579#endif 4476#endif
3580 4477
3581#if EV_FORK_ENABLE 4478#if EV_FORK_ENABLE
3582void 4479void
3583ev_fork_start (EV_P_ ev_fork *w) 4480ev_fork_start (EV_P_ ev_fork *w) EV_THROW
3584{ 4481{
3585 if (expect_false (ev_is_active (w))) 4482 if (expect_false (ev_is_active (w)))
3586 return; 4483 return;
3587 4484
3588 EV_FREQUENT_CHECK; 4485 EV_FREQUENT_CHECK;
… …
3593 4490
3594 EV_FREQUENT_CHECK; 4491 EV_FREQUENT_CHECK;
3595} 4492}
3596 4493
3597void 4494void
3598ev_fork_stop (EV_P_ ev_fork *w) 4495ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
3599{ 4496{
3600 clear_pending (EV_A_ (W)w); 4497 clear_pending (EV_A_ (W)w);
3601 if (expect_false (!ev_is_active (w))) 4498 if (expect_false (!ev_is_active (w)))
3602 return; 4499 return;
3603 4500
… …
3616} 4513}
3617#endif 4514#endif
3618 4515
3619#if EV_CLEANUP_ENABLE 4516#if EV_CLEANUP_ENABLE
3620void 4517void
3621ev_cleanup_start (EV_P_ ev_cleanup *w) 4518ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
3622{ 4519{
3623 if (expect_false (ev_is_active (w))) 4520 if (expect_false (ev_is_active (w)))
3624 return; 4521 return;
3625 4522
3626 EV_FREQUENT_CHECK; 4523 EV_FREQUENT_CHECK;
… …
3633 ev_unref (EV_A); 4530 ev_unref (EV_A);
3634 EV_FREQUENT_CHECK; 4531 EV_FREQUENT_CHECK;
3635} 4532}
3636 4533
3637void 4534void
3638ev_cleanup_stop (EV_P_ ev_cleanup *w) 4535ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
3639{ 4536{
3640 clear_pending (EV_A_ (W)w); 4537 clear_pending (EV_A_ (W)w);
3641 if (expect_false (!ev_is_active (w))) 4538 if (expect_false (!ev_is_active (w)))
3642 return; 4539 return;
3643 4540
… …
3657} 4554}
3658#endif 4555#endif
3659 4556
3660#if EV_ASYNC_ENABLE 4557#if EV_ASYNC_ENABLE
3661void 4558void
3662ev_async_start (EV_P_ ev_async *w) 4559ev_async_start (EV_P_ ev_async *w) EV_THROW
3663{ 4560{
3664 if (expect_false (ev_is_active (w))) 4561 if (expect_false (ev_is_active (w)))
3665 return; 4562 return;
3666 4563
3667 w->sent = 0; 4564 w->sent = 0;
… …
3676 4573
3677 EV_FREQUENT_CHECK; 4574 EV_FREQUENT_CHECK;
3678} 4575}
3679 4576
3680void 4577void
3681ev_async_stop (EV_P_ ev_async *w) 4578ev_async_stop (EV_P_ ev_async *w) EV_THROW
3682{ 4579{
3683 clear_pending (EV_A_ (W)w); 4580 clear_pending (EV_A_ (W)w);
3684 if (expect_false (!ev_is_active (w))) 4581 if (expect_false (!ev_is_active (w)))
3685 return; 4582 return;
3686 4583
… …
3697 4594
3698 EV_FREQUENT_CHECK; 4595 EV_FREQUENT_CHECK;
3699} 4596}
3700 4597
3701void 4598void
3702ev_async_send (EV_P_ ev_async *w) 4599ev_async_send (EV_P_ ev_async *w) EV_THROW
3703{ 4600{
3704 w->sent = 1; 4601 w->sent = 1;
3705 evpipe_write (EV_A_ &async_pending); 4602 evpipe_write (EV_A_ &async_pending);
3706} 4603}
3707#endif 4604#endif
… …
3744 4641
3745 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 4642 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3746} 4643}
3747 4644
3748void 4645void
3749ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4646ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
3750{ 4647{
3751 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4648 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3752 4649
3753 if (expect_false (!once)) 4650 if (expect_false (!once))
3754 { 4651 {
… …
3775} 4672}
3776 4673
3777/*****************************************************************************/ 4674/*****************************************************************************/
3778 4675
3779#if EV_WALK_ENABLE 4676#if EV_WALK_ENABLE
3780void 4677void ecb_cold
3781ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4678ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
3782{ 4679{
3783 int i, j; 4680 int i, j;
3784 ev_watcher_list *wl, *wn; 4681 ev_watcher_list *wl, *wn;
3785 4682
3786 if (types & (EV_IO | EV_EMBED)) 4683 if (types & (EV_IO | EV_EMBED))
… …
3829 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4726 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3830#endif 4727#endif
3831 4728
3832#if EV_IDLE_ENABLE 4729#if EV_IDLE_ENABLE
3833 if (types & EV_IDLE) 4730 if (types & EV_IDLE)
3834 for (j = NUMPRI; i--; ) 4731 for (j = NUMPRI; j--; )
3835 for (i = idlecnt [j]; i--; ) 4732 for (i = idlecnt [j]; i--; )
3836 cb (EV_A_ EV_IDLE, idles [j][i]); 4733 cb (EV_A_ EV_IDLE, idles [j][i]);
3837#endif 4734#endif
3838 4735
3839#if EV_FORK_ENABLE 4736#if EV_FORK_ENABLE
… …
3892 4789
3893#if EV_MULTIPLICITY 4790#if EV_MULTIPLICITY
3894 #include "ev_wrap.h" 4791 #include "ev_wrap.h"
3895#endif 4792#endif
3896 4793
3897EV_CPP(})
3898

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