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Comparing libev/ev.c (file contents):
Revision 1.367 by root, Tue Jan 11 02:15:58 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
… …
376# undef EV_USE_INOTIFY 405# undef EV_USE_INOTIFY
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# ifndef _WIN32 410/* hp-ux has it in sys/time.h, which we unconditionally include above */
411# if !defined _WIN32 && !defined __hpux
382# include <sys/select.h> 412# include <sys/select.h>
383# endif 413# endif
384#endif 414#endif
385 415
386#if EV_USE_INOTIFY 416#if EV_USE_INOTIFY
… …
389/* 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 */
390# ifndef IN_DONT_FOLLOW 420# ifndef IN_DONT_FOLLOW
391# undef EV_USE_INOTIFY 421# undef EV_USE_INOTIFY
392# define EV_USE_INOTIFY 0 422# define EV_USE_INOTIFY 0
393# endif 423# endif
394#endif
395
396#if EV_SELECT_IS_WINSOCKET
397# include <winsock.h>
398#endif 424#endif
399 425
400#if EV_USE_EVENTFD 426#if EV_USE_EVENTFD
401/* 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 */
402# include <stdint.h> 428# include <stdint.h>
… …
442#else 468#else
443# define EV_FREQUENT_CHECK do { } while (0) 469# define EV_FREQUENT_CHECK do { } while (0)
444#endif 470#endif
445 471
446/* 472/*
447 * This is used to avoid floating point rounding problems. 473 * This is used to work around floating point rounding problems.
448 * It is added to ev_rt_now when scheduling periodics
449 * to ensure progress, time-wise, even when rounding
450 * errors are against us.
451 * This value is good at least till the year 4000. 474 * This value is good at least till the year 4000.
452 * Better solutions welcome.
453 */ 475 */
454#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 */
455 478
456#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) */
457#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) */
458 481
459#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)
460#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)
461 484
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;
462#if __GNUC__ >= 4 529 #if __GNUC__
463# define expect(expr,value) __builtin_expect ((expr),(value)) 530 typedef signed long long int64_t;
464# 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
465#else 545#else
466# define expect(expr,value) (expr) 546 #include <inttypes.h>
467# define noinline 547 #if UINTMAX_MAX > 0xffffffffU
468# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 548 #define ECB_PTRSIZE 8
469# define inline 549 #else
550 #define ECB_PTRSIZE 4
551 #endif
470# 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)))
471#endif 566 #endif
567#endif
472 568
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. */
473#define expect_false(expr) expect ((expr) != 0, 0) 782#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
474#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
475#define inline_size static inline 1224#define inline_size ecb_inline
476 1225
477#if EV_FEATURE_CODE 1226#if EV_FEATURE_CODE
478# define inline_speed static inline 1227# define inline_speed ecb_inline
479#else 1228#else
480# define inline_speed static noinline 1229# define inline_speed static noinline
481#endif 1230#endif
482 1231
483#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1232#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
… …
522# include "ev_win32.c" 1271# include "ev_win32.c"
523#endif 1272#endif
524 1273
525/*****************************************************************************/ 1274/*****************************************************************************/
526 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
527#ifdef __linux 1324#ifdef __linux
528# include <sys/utsname.h> 1325# include <sys/utsname.h>
529#endif 1326#endif
530 1327
531static unsigned int noinline 1328static unsigned int noinline ecb_cold
532ev_linux_version (void) 1329ev_linux_version (void)
533{ 1330{
534#ifdef __linux 1331#ifdef __linux
535 unsigned int v = 0; 1332 unsigned int v = 0;
536 struct utsname buf; 1333 struct utsname buf;
… …
565} 1362}
566 1363
567/*****************************************************************************/ 1364/*****************************************************************************/
568 1365
569#if EV_AVOID_STDIO 1366#if EV_AVOID_STDIO
570static void noinline 1367static void noinline ecb_cold
571ev_printerr (const char *msg) 1368ev_printerr (const char *msg)
572{ 1369{
573 write (STDERR_FILENO, msg, strlen (msg)); 1370 write (STDERR_FILENO, msg, strlen (msg));
574} 1371}
575#endif 1372#endif
576 1373
577static void (*syserr_cb)(const char *msg); 1374static void (*syserr_cb)(const char *msg) EV_THROW;
578 1375
579void 1376void ecb_cold
580ev_set_syserr_cb (void (*cb)(const char *msg)) 1377ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
581{ 1378{
582 syserr_cb = cb; 1379 syserr_cb = cb;
583} 1380}
584 1381
585static void noinline 1382static void noinline ecb_cold
586ev_syserr (const char *msg) 1383ev_syserr (const char *msg)
587{ 1384{
588 if (!msg) 1385 if (!msg)
589 msg = "(libev) system error"; 1386 msg = "(libev) system error";
590 1387
… …
603 abort (); 1400 abort ();
604 } 1401 }
605} 1402}
606 1403
607static void * 1404static void *
608ev_realloc_emul (void *ptr, long size) 1405ev_realloc_emul (void *ptr, long size) EV_THROW
609{ 1406{
610#if __GLIBC__
611 return realloc (ptr, size);
612#else
613 /* some systems, notably openbsd and darwin, fail to properly 1407 /* some systems, notably openbsd and darwin, fail to properly
614 * 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
615 * 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.
616 */ 1412 */
617 1413
618 if (size) 1414 if (size)
619 return realloc (ptr, size); 1415 return realloc (ptr, size);
620 1416
621 free (ptr); 1417 free (ptr);
622 return 0; 1418 return 0;
623#endif
624} 1419}
625 1420
626static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1421static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
627 1422
628void 1423void ecb_cold
629ev_set_allocator (void *(*cb)(void *ptr, long size)) 1424ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
630{ 1425{
631 alloc = cb; 1426 alloc = cb;
632} 1427}
633 1428
634inline_speed void * 1429inline_speed void *
… …
722 #undef VAR 1517 #undef VAR
723 }; 1518 };
724 #include "ev_wrap.h" 1519 #include "ev_wrap.h"
725 1520
726 static struct ev_loop default_loop_struct; 1521 static struct ev_loop default_loop_struct;
727 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 */
728 1523
729#else 1524#else
730 1525
731 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 */
732 #define VAR(name,decl) static decl; 1527 #define VAR(name,decl) static decl;
733 #include "ev_vars.h" 1528 #include "ev_vars.h"
734 #undef VAR 1529 #undef VAR
735 1530
736 static int ev_default_loop_ptr; 1531 static int ev_default_loop_ptr;
… …
751 1546
752/*****************************************************************************/ 1547/*****************************************************************************/
753 1548
754#ifndef EV_HAVE_EV_TIME 1549#ifndef EV_HAVE_EV_TIME
755ev_tstamp 1550ev_tstamp
756ev_time (void) 1551ev_time (void) EV_THROW
757{ 1552{
758#if EV_USE_REALTIME 1553#if EV_USE_REALTIME
759 if (expect_true (have_realtime)) 1554 if (expect_true (have_realtime))
760 { 1555 {
761 struct timespec ts; 1556 struct timespec ts;
… …
785 return ev_time (); 1580 return ev_time ();
786} 1581}
787 1582
788#if EV_MULTIPLICITY 1583#if EV_MULTIPLICITY
789ev_tstamp 1584ev_tstamp
790ev_now (EV_P) 1585ev_now (EV_P) EV_THROW
791{ 1586{
792 return ev_rt_now; 1587 return ev_rt_now;
793} 1588}
794#endif 1589#endif
795 1590
796void 1591void
797ev_sleep (ev_tstamp delay) 1592ev_sleep (ev_tstamp delay) EV_THROW
798{ 1593{
799 if (delay > 0.) 1594 if (delay > 0.)
800 { 1595 {
801#if EV_USE_NANOSLEEP 1596#if EV_USE_NANOSLEEP
802 struct timespec ts; 1597 struct timespec ts;
803 1598
804 EV_TS_SET (ts, delay); 1599 EV_TS_SET (ts, delay);
805 nanosleep (&ts, 0); 1600 nanosleep (&ts, 0);
806#elif defined(_WIN32) 1601#elif defined _WIN32
807 Sleep ((unsigned long)(delay * 1e3)); 1602 Sleep ((unsigned long)(delay * 1e3));
808#else 1603#else
809 struct timeval tv; 1604 struct timeval tv;
810 1605
811 /* 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 */
… …
830 1625
831 do 1626 do
832 ncur <<= 1; 1627 ncur <<= 1;
833 while (cnt > ncur); 1628 while (cnt > ncur);
834 1629
835 /* 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 */
836 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1631 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
837 { 1632 {
838 ncur *= elem; 1633 ncur *= elem;
839 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);
840 ncur = ncur - sizeof (void *) * 4; 1635 ncur = ncur - sizeof (void *) * 4;
… …
842 } 1637 }
843 1638
844 return ncur; 1639 return ncur;
845} 1640}
846 1641
847static noinline void * 1642static void * noinline ecb_cold
848array_realloc (int elem, void *base, int *cur, int cnt) 1643array_realloc (int elem, void *base, int *cur, int cnt)
849{ 1644{
850 *cur = array_nextsize (elem, *cur, cnt); 1645 *cur = array_nextsize (elem, *cur, cnt);
851 return ev_realloc (base, elem * *cur); 1646 return ev_realloc (base, elem * *cur);
852} 1647}
… …
855 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1650 memset ((void *)(base), 0, sizeof (*(base)) * (count))
856 1651
857#define array_needsize(type,base,cur,cnt,init) \ 1652#define array_needsize(type,base,cur,cnt,init) \
858 if (expect_false ((cnt) > (cur))) \ 1653 if (expect_false ((cnt) > (cur))) \
859 { \ 1654 { \
860 int ocur_ = (cur); \ 1655 int ecb_unused ocur_ = (cur); \
861 (base) = (type *)array_realloc \ 1656 (base) = (type *)array_realloc \
862 (sizeof (type), (base), &(cur), (cnt)); \ 1657 (sizeof (type), (base), &(cur), (cnt)); \
863 init ((base) + (ocur_), (cur) - ocur_); \ 1658 init ((base) + (ocur_), (cur) - ocur_); \
864 } 1659 }
865 1660
… …
883pendingcb (EV_P_ ev_prepare *w, int revents) 1678pendingcb (EV_P_ ev_prepare *w, int revents)
884{ 1679{
885} 1680}
886 1681
887void noinline 1682void noinline
888ev_feed_event (EV_P_ void *w, int revents) 1683ev_feed_event (EV_P_ void *w, int revents) EV_THROW
889{ 1684{
890 W w_ = (W)w; 1685 W w_ = (W)w;
891 int pri = ABSPRI (w_); 1686 int pri = ABSPRI (w_);
892 1687
893 if (expect_false (w_->pending)) 1688 if (expect_false (w_->pending))
… …
897 w_->pending = ++pendingcnt [pri]; 1692 w_->pending = ++pendingcnt [pri];
898 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1693 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
899 pendings [pri][w_->pending - 1].w = w_; 1694 pendings [pri][w_->pending - 1].w = w_;
900 pendings [pri][w_->pending - 1].events = revents; 1695 pendings [pri][w_->pending - 1].events = revents;
901 } 1696 }
1697
1698 pendingpri = NUMPRI - 1;
902} 1699}
903 1700
904inline_speed void 1701inline_speed void
905feed_reverse (EV_P_ W w) 1702feed_reverse (EV_P_ W w)
906{ 1703{
… …
952 if (expect_true (!anfd->reify)) 1749 if (expect_true (!anfd->reify))
953 fd_event_nocheck (EV_A_ fd, revents); 1750 fd_event_nocheck (EV_A_ fd, revents);
954} 1751}
955 1752
956void 1753void
957ev_feed_fd_event (EV_P_ int fd, int revents) 1754ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
958{ 1755{
959 if (fd >= 0 && fd < anfdmax) 1756 if (fd >= 0 && fd < anfdmax)
960 fd_event_nocheck (EV_A_ fd, revents); 1757 fd_event_nocheck (EV_A_ fd, revents);
961} 1758}
962 1759
… …
965inline_size void 1762inline_size void
966fd_reify (EV_P) 1763fd_reify (EV_P)
967{ 1764{
968 int i; 1765 int i;
969 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
970 for (i = 0; i < fdchangecnt; ++i) 1792 for (i = 0; i < fdchangecnt; ++i)
971 { 1793 {
972 int fd = fdchanges [i]; 1794 int fd = fdchanges [i];
973 ANFD *anfd = anfds + fd; 1795 ANFD *anfd = anfds + fd;
974 ev_io *w; 1796 ev_io *w;
… …
976 unsigned char o_events = anfd->events; 1798 unsigned char o_events = anfd->events;
977 unsigned char o_reify = anfd->reify; 1799 unsigned char o_reify = anfd->reify;
978 1800
979 anfd->reify = 0; 1801 anfd->reify = 0;
980 1802
981#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
982 if (o_reify & EV__IOFDSET)
983 {
984 unsigned long arg;
985 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
986 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
987 printf ("oi %d %x\n", fd, anfd->handle);//D
988 }
989#endif
990
991 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 1803 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
992 { 1804 {
993 anfd->events = 0; 1805 anfd->events = 0;
994 1806
995 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)
… …
1020 fdchanges [fdchangecnt - 1] = fd; 1832 fdchanges [fdchangecnt - 1] = fd;
1021 } 1833 }
1022} 1834}
1023 1835
1024/* 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 */
1025inline_speed void 1837inline_speed void ecb_cold
1026fd_kill (EV_P_ int fd) 1838fd_kill (EV_P_ int fd)
1027{ 1839{
1028 ev_io *w; 1840 ev_io *w;
1029 1841
1030 while ((w = (ev_io *)anfds [fd].head)) 1842 while ((w = (ev_io *)anfds [fd].head))
… …
1033 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);
1034 } 1846 }
1035} 1847}
1036 1848
1037/* check whether the given fd is actually valid, for error recovery */ 1849/* check whether the given fd is actually valid, for error recovery */
1038inline_size int 1850inline_size int ecb_cold
1039fd_valid (int fd) 1851fd_valid (int fd)
1040{ 1852{
1041#ifdef _WIN32 1853#ifdef _WIN32
1042 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1854 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1043#else 1855#else
1044 return fcntl (fd, F_GETFD) != -1; 1856 return fcntl (fd, F_GETFD) != -1;
1045#endif 1857#endif
1046} 1858}
1047 1859
1048/* called on EBADF to verify fds */ 1860/* called on EBADF to verify fds */
1049static void noinline 1861static void noinline ecb_cold
1050fd_ebadf (EV_P) 1862fd_ebadf (EV_P)
1051{ 1863{
1052 int fd; 1864 int fd;
1053 1865
1054 for (fd = 0; fd < anfdmax; ++fd) 1866 for (fd = 0; fd < anfdmax; ++fd)
… …
1056 if (!fd_valid (fd) && errno == EBADF) 1868 if (!fd_valid (fd) && errno == EBADF)
1057 fd_kill (EV_A_ fd); 1869 fd_kill (EV_A_ fd);
1058} 1870}
1059 1871
1060/* 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 */
1061static void noinline 1873static void noinline ecb_cold
1062fd_enomem (EV_P) 1874fd_enomem (EV_P)
1063{ 1875{
1064 int fd; 1876 int fd;
1065 1877
1066 for (fd = anfdmax; fd--; ) 1878 for (fd = anfdmax; fd--; )
… …
1261 2073
1262/*****************************************************************************/ 2074/*****************************************************************************/
1263 2075
1264#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2076#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1265 2077
1266static void noinline 2078static void noinline ecb_cold
1267evpipe_init (EV_P) 2079evpipe_init (EV_P)
1268{ 2080{
1269 if (!ev_is_active (&pipe_w)) 2081 if (!ev_is_active (&pipe_w))
1270 { 2082 {
2083 int fds [2];
2084
1271# if EV_USE_EVENTFD 2085# if EV_USE_EVENTFD
2086 fds [0] = -1;
1272 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2087 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1273 if (evfd < 0 && errno == EINVAL) 2088 if (fds [1] < 0 && errno == EINVAL)
1274 evfd = eventfd (0, 0); 2089 fds [1] = eventfd (0, 0);
1275 2090
1276 if (evfd >= 0) 2091 if (fds [1] < 0)
2092# endif
1277 { 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
1278 evpipe [0] = -1; 2102 evpipe [0] = fds [0];
1279 fd_intern (evfd); /* doing it twice doesn't hurt */ 2103
1280 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));
1281 } 2152 }
1282 else 2153 else
1283# endif 2154#endif
1284 { 2155 {
1285 while (pipe (evpipe)) 2156#ifdef _WIN32
1286 ev_syserr ("(libev) error creating signal/async pipe"); 2157 WSABUF buf;
1287 2158 DWORD sent;
1288 fd_intern (evpipe [0]); 2159 buf.buf = &buf;
1289 fd_intern (evpipe [1]); 2160 buf.len = 1;
1290 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
1291 } 2165 }
1292
1293 ev_io_start (EV_A_ &pipe_w);
1294 ev_unref (EV_A); /* watcher should not keep loop alive */
1295 }
1296}
1297
1298inline_size void
1299evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1300{
1301 if (!*flag)
1302 {
1303 int old_errno = errno; /* save errno because write might clobber it */
1304 char dummy;
1305
1306 *flag = 1;
1307
1308#if EV_USE_EVENTFD
1309 if (evfd >= 0)
1310 {
1311 uint64_t counter = 1;
1312 write (evfd, &counter, sizeof (uint64_t));
1313 }
1314 else
1315#endif
1316 /* win32 people keep sending patches that change this write() to send() */
1317 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1318 /* so when you think this write should be a send instead, please find out */
1319 /* where your send() is from - it's definitely not the microsoft send, and */
1320 /* tell me. thank you. */
1321 write (evpipe [1], &dummy, 1);
1322 2166
1323 errno = old_errno; 2167 errno = old_errno;
1324 } 2168 }
1325} 2169}
1326 2170
… …
1329static void 2173static void
1330pipecb (EV_P_ ev_io *iow, int revents) 2174pipecb (EV_P_ ev_io *iow, int revents)
1331{ 2175{
1332 int i; 2176 int i;
1333 2177
2178 if (revents & EV_READ)
2179 {
1334#if EV_USE_EVENTFD 2180#if EV_USE_EVENTFD
1335 if (evfd >= 0) 2181 if (evpipe [0] < 0)
1336 { 2182 {
1337 uint64_t counter; 2183 uint64_t counter;
1338 read (evfd, &counter, sizeof (uint64_t)); 2184 read (evpipe [1], &counter, sizeof (uint64_t));
1339 } 2185 }
1340 else 2186 else
1341#endif 2187#endif
1342 { 2188 {
1343 char dummy; 2189 char dummy[4];
1344 /* 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
1345 read (evpipe [0], &dummy, 1); 2198 read (evpipe [0], &dummy, sizeof (dummy));
2199#endif
2200 }
1346 } 2201 }
1347 2202
2203 pipe_write_skipped = 0;
2204
2205 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2206
2207#if EV_SIGNAL_ENABLE
1348 if (sig_pending) 2208 if (sig_pending)
1349 { 2209 {
1350 sig_pending = 0; 2210 sig_pending = 0;
2211
2212 ECB_MEMORY_FENCE;
1351 2213
1352 for (i = EV_NSIG - 1; i--; ) 2214 for (i = EV_NSIG - 1; i--; )
1353 if (expect_false (signals [i].pending)) 2215 if (expect_false (signals [i].pending))
1354 ev_feed_signal_event (EV_A_ i + 1); 2216 ev_feed_signal_event (EV_A_ i + 1);
1355 } 2217 }
2218#endif
1356 2219
1357#if EV_ASYNC_ENABLE 2220#if EV_ASYNC_ENABLE
1358 if (async_pending) 2221 if (async_pending)
1359 { 2222 {
1360 async_pending = 0; 2223 async_pending = 0;
2224
2225 ECB_MEMORY_FENCE;
1361 2226
1362 for (i = asynccnt; i--; ) 2227 for (i = asynccnt; i--; )
1363 if (asyncs [i]->sent) 2228 if (asyncs [i]->sent)
1364 { 2229 {
1365 asyncs [i]->sent = 0; 2230 asyncs [i]->sent = 0;
2231 ECB_MEMORY_FENCE_RELEASE;
1366 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2232 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1367 } 2233 }
1368 } 2234 }
1369#endif 2235#endif
1370} 2236}
1371 2237
1372/*****************************************************************************/ 2238/*****************************************************************************/
1373 2239
1374void 2240void
1375ev_feed_signal (int signum) 2241ev_feed_signal (int signum) EV_THROW
1376{ 2242{
1377#if EV_MULTIPLICITY 2243#if EV_MULTIPLICITY
2244 ECB_MEMORY_FENCE_ACQUIRE;
1378 EV_P = signals [signum - 1].loop; 2245 EV_P = signals [signum - 1].loop;
1379 2246
1380 if (!EV_A) 2247 if (!EV_A)
1381 return; 2248 return;
1382#endif 2249#endif
… …
1394 2261
1395 ev_feed_signal (signum); 2262 ev_feed_signal (signum);
1396} 2263}
1397 2264
1398void noinline 2265void noinline
1399ev_feed_signal_event (EV_P_ int signum) 2266ev_feed_signal_event (EV_P_ int signum) EV_THROW
1400{ 2267{
1401 WL w; 2268 WL w;
1402 2269
1403 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2270 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1404 return; 2271 return;
1405 2272
1406 --signum; 2273 --signum;
1407 2274
1408#if EV_MULTIPLICITY 2275#if EV_MULTIPLICITY
… …
1412 if (expect_false (signals [signum].loop != EV_A)) 2279 if (expect_false (signals [signum].loop != EV_A))
1413 return; 2280 return;
1414#endif 2281#endif
1415 2282
1416 signals [signum].pending = 0; 2283 signals [signum].pending = 0;
2284 ECB_MEMORY_FENCE_RELEASE;
1417 2285
1418 for (w = signals [signum].head; w; w = w->next) 2286 for (w = signals [signum].head; w; w = w->next)
1419 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2287 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1420} 2288}
1421 2289
… …
1519#endif 2387#endif
1520#if EV_USE_SELECT 2388#if EV_USE_SELECT
1521# include "ev_select.c" 2389# include "ev_select.c"
1522#endif 2390#endif
1523 2391
1524int 2392int ecb_cold
1525ev_version_major (void) 2393ev_version_major (void) EV_THROW
1526{ 2394{
1527 return EV_VERSION_MAJOR; 2395 return EV_VERSION_MAJOR;
1528} 2396}
1529 2397
1530int 2398int ecb_cold
1531ev_version_minor (void) 2399ev_version_minor (void) EV_THROW
1532{ 2400{
1533 return EV_VERSION_MINOR; 2401 return EV_VERSION_MINOR;
1534} 2402}
1535 2403
1536/* 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 */
1537int inline_size 2405int inline_size ecb_cold
1538enable_secure (void) 2406enable_secure (void)
1539{ 2407{
1540#ifdef _WIN32 2408#ifdef _WIN32
1541 return 0; 2409 return 0;
1542#else 2410#else
1543 return getuid () != geteuid () 2411 return getuid () != geteuid ()
1544 || getgid () != getegid (); 2412 || getgid () != getegid ();
1545#endif 2413#endif
1546} 2414}
1547 2415
1548unsigned int 2416unsigned int ecb_cold
1549ev_supported_backends (void) 2417ev_supported_backends (void) EV_THROW
1550{ 2418{
1551 unsigned int flags = 0; 2419 unsigned int flags = 0;
1552 2420
1553 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2421 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1554 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2422 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1557 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2425 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1558 2426
1559 return flags; 2427 return flags;
1560} 2428}
1561 2429
1562unsigned int 2430unsigned int ecb_cold
1563ev_recommended_backends (void) 2431ev_recommended_backends (void) EV_THROW
1564{ 2432{
1565 unsigned int flags = ev_supported_backends (); 2433 unsigned int flags = ev_supported_backends ();
1566 2434
1567#ifndef __NetBSD__ 2435#ifndef __NetBSD__
1568 /* kqueue is borked on everything but netbsd apparently */ 2436 /* kqueue is borked on everything but netbsd apparently */
… …
1579#endif 2447#endif
1580 2448
1581 return flags; 2449 return flags;
1582} 2450}
1583 2451
1584unsigned int 2452unsigned int ecb_cold
1585ev_embeddable_backends (void) 2453ev_embeddable_backends (void) EV_THROW
1586{ 2454{
1587 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2455 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1588 2456
1589 /* 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 */
1590 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 */
… …
1592 2460
1593 return flags; 2461 return flags;
1594} 2462}
1595 2463
1596unsigned int 2464unsigned int
1597ev_backend (EV_P) 2465ev_backend (EV_P) EV_THROW
1598{ 2466{
1599 return backend; 2467 return backend;
1600} 2468}
1601 2469
1602#if EV_FEATURE_API 2470#if EV_FEATURE_API
1603unsigned int 2471unsigned int
1604ev_iteration (EV_P) 2472ev_iteration (EV_P) EV_THROW
1605{ 2473{
1606 return loop_count; 2474 return loop_count;
1607} 2475}
1608 2476
1609unsigned int 2477unsigned int
1610ev_depth (EV_P) 2478ev_depth (EV_P) EV_THROW
1611{ 2479{
1612 return loop_depth; 2480 return loop_depth;
1613} 2481}
1614 2482
1615void 2483void
1616ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2484ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1617{ 2485{
1618 io_blocktime = interval; 2486 io_blocktime = interval;
1619} 2487}
1620 2488
1621void 2489void
1622ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2490ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1623{ 2491{
1624 timeout_blocktime = interval; 2492 timeout_blocktime = interval;
1625} 2493}
1626 2494
1627void 2495void
1628ev_set_userdata (EV_P_ void *data) 2496ev_set_userdata (EV_P_ void *data) EV_THROW
1629{ 2497{
1630 userdata = data; 2498 userdata = data;
1631} 2499}
1632 2500
1633void * 2501void *
1634ev_userdata (EV_P) 2502ev_userdata (EV_P) EV_THROW
1635{ 2503{
1636 return userdata; 2504 return userdata;
1637} 2505}
1638 2506
2507void
1639void 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
1640{ 2509{
1641 invoke_cb = invoke_pending_cb; 2510 invoke_cb = invoke_pending_cb;
1642} 2511}
1643 2512
2513void
1644void 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
1645{ 2515{
1646 release_cb = release; 2516 release_cb = release;
1647 acquire_cb = acquire; 2517 acquire_cb = acquire;
1648} 2518}
1649#endif 2519#endif
1650 2520
1651/* initialise a loop structure, must be zero-initialised */ 2521/* initialise a loop structure, must be zero-initialised */
1652static void noinline 2522static void noinline ecb_cold
1653loop_init (EV_P_ unsigned int flags) 2523loop_init (EV_P_ unsigned int flags) EV_THROW
1654{ 2524{
1655 if (!backend) 2525 if (!backend)
1656 { 2526 {
1657 origflags = flags; 2527 origflags = flags;
1658 2528
… …
1685 if (!(flags & EVFLAG_NOENV) 2555 if (!(flags & EVFLAG_NOENV)
1686 && !enable_secure () 2556 && !enable_secure ()
1687 && getenv ("LIBEV_FLAGS")) 2557 && getenv ("LIBEV_FLAGS"))
1688 flags = atoi (getenv ("LIBEV_FLAGS")); 2558 flags = atoi (getenv ("LIBEV_FLAGS"));
1689 2559
1690 ev_rt_now = ev_time (); 2560 ev_rt_now = ev_time ();
1691 mn_now = get_clock (); 2561 mn_now = get_clock ();
1692 now_floor = mn_now; 2562 now_floor = mn_now;
1693 rtmn_diff = ev_rt_now - mn_now; 2563 rtmn_diff = ev_rt_now - mn_now;
1694#if EV_FEATURE_API 2564#if EV_FEATURE_API
1695 invoke_cb = ev_invoke_pending; 2565 invoke_cb = ev_invoke_pending;
1696#endif 2566#endif
1697 2567
1698 io_blocktime = 0.; 2568 io_blocktime = 0.;
1699 timeout_blocktime = 0.; 2569 timeout_blocktime = 0.;
1700 backend = 0; 2570 backend = 0;
1701 backend_fd = -1; 2571 backend_fd = -1;
1702 sig_pending = 0; 2572 sig_pending = 0;
1703#if EV_ASYNC_ENABLE 2573#if EV_ASYNC_ENABLE
1704 async_pending = 0; 2574 async_pending = 0;
1705#endif 2575#endif
2576 pipe_write_skipped = 0;
2577 pipe_write_wanted = 0;
2578 evpipe [0] = -1;
2579 evpipe [1] = -1;
1706#if EV_USE_INOTIFY 2580#if EV_USE_INOTIFY
1707 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2581 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1708#endif 2582#endif
1709#if EV_USE_SIGNALFD 2583#if EV_USE_SIGNALFD
1710 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2584 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1711#endif 2585#endif
1712 2586
1713 if (!(flags & EVBACKEND_MASK)) 2587 if (!(flags & EVBACKEND_MASK))
1714 flags |= ev_recommended_backends (); 2588 flags |= ev_recommended_backends ();
1715 2589
… …
1740#endif 2614#endif
1741 } 2615 }
1742} 2616}
1743 2617
1744/* free up a loop structure */ 2618/* free up a loop structure */
1745void 2619void ecb_cold
1746ev_loop_destroy (EV_P) 2620ev_loop_destroy (EV_P)
1747{ 2621{
1748 int i; 2622 int i;
1749 2623
1750#if EV_MULTIPLICITY 2624#if EV_MULTIPLICITY
… …
1761 EV_INVOKE_PENDING; 2635 EV_INVOKE_PENDING;
1762 } 2636 }
1763#endif 2637#endif
1764 2638
1765#if EV_CHILD_ENABLE 2639#if EV_CHILD_ENABLE
1766 if (ev_is_active (&childev)) 2640 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
1767 { 2641 {
1768 ev_ref (EV_A); /* child watcher */ 2642 ev_ref (EV_A); /* child watcher */
1769 ev_signal_stop (EV_A_ &childev); 2643 ev_signal_stop (EV_A_ &childev);
1770 } 2644 }
1771#endif 2645#endif
… …
1773 if (ev_is_active (&pipe_w)) 2647 if (ev_is_active (&pipe_w))
1774 { 2648 {
1775 /*ev_ref (EV_A);*/ 2649 /*ev_ref (EV_A);*/
1776 /*ev_io_stop (EV_A_ &pipe_w);*/ 2650 /*ev_io_stop (EV_A_ &pipe_w);*/
1777 2651
1778#if EV_USE_EVENTFD
1779 if (evfd >= 0)
1780 close (evfd);
1781#endif
1782
1783 if (evpipe [0] >= 0)
1784 {
1785 EV_WIN32_CLOSE_FD (evpipe [0]); 2652 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1786 EV_WIN32_CLOSE_FD (evpipe [1]); 2653 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1787 }
1788 } 2654 }
1789 2655
1790#if EV_USE_SIGNALFD 2656#if EV_USE_SIGNALFD
1791 if (ev_is_active (&sigfd_w)) 2657 if (ev_is_active (&sigfd_w))
1792 close (sigfd); 2658 close (sigfd);
… …
1878#endif 2744#endif
1879#if EV_USE_INOTIFY 2745#if EV_USE_INOTIFY
1880 infy_fork (EV_A); 2746 infy_fork (EV_A);
1881#endif 2747#endif
1882 2748
2749#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1883 if (ev_is_active (&pipe_w)) 2750 if (ev_is_active (&pipe_w))
1884 { 2751 {
1885 /* this "locks" the handlers against writing to the pipe */ 2752 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1886 /* while we modify the fd vars */
1887 sig_pending = 1;
1888#if EV_ASYNC_ENABLE
1889 async_pending = 1;
1890#endif
1891 2753
1892 ev_ref (EV_A); 2754 ev_ref (EV_A);
1893 ev_io_stop (EV_A_ &pipe_w); 2755 ev_io_stop (EV_A_ &pipe_w);
1894 2756
1895#if EV_USE_EVENTFD
1896 if (evfd >= 0)
1897 close (evfd);
1898#endif
1899
1900 if (evpipe [0] >= 0) 2757 if (evpipe [0] >= 0)
1901 {
1902 EV_WIN32_CLOSE_FD (evpipe [0]); 2758 EV_WIN32_CLOSE_FD (evpipe [0]);
1903 EV_WIN32_CLOSE_FD (evpipe [1]);
1904 }
1905 2759
1906#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1907 evpipe_init (EV_A); 2760 evpipe_init (EV_A);
1908 /* now iterate over everything, in case we missed something */ 2761 /* iterate over everything, in case we missed something before */
1909 pipecb (EV_A_ &pipe_w, EV_READ); 2762 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1910#endif
1911 } 2763 }
2764#endif
1912 2765
1913 postfork = 0; 2766 postfork = 0;
1914} 2767}
1915 2768
1916#if EV_MULTIPLICITY 2769#if EV_MULTIPLICITY
1917 2770
1918struct ev_loop * 2771struct ev_loop * ecb_cold
1919ev_loop_new (unsigned int flags) 2772ev_loop_new (unsigned int flags) EV_THROW
1920{ 2773{
1921 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2774 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1922 2775
1923 memset (EV_A, 0, sizeof (struct ev_loop)); 2776 memset (EV_A, 0, sizeof (struct ev_loop));
1924 loop_init (EV_A_ flags); 2777 loop_init (EV_A_ flags);
… …
1931} 2784}
1932 2785
1933#endif /* multiplicity */ 2786#endif /* multiplicity */
1934 2787
1935#if EV_VERIFY 2788#if EV_VERIFY
1936static void noinline 2789static void noinline ecb_cold
1937verify_watcher (EV_P_ W w) 2790verify_watcher (EV_P_ W w)
1938{ 2791{
1939 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));
1940 2793
1941 if (w->pending) 2794 if (w->pending)
1942 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));
1943} 2796}
1944 2797
1945static void noinline 2798static void noinline ecb_cold
1946verify_heap (EV_P_ ANHE *heap, int N) 2799verify_heap (EV_P_ ANHE *heap, int N)
1947{ 2800{
1948 int i; 2801 int i;
1949 2802
1950 for (i = HEAP0; i < N + HEAP0; ++i) 2803 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1955 2808
1956 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2809 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1957 } 2810 }
1958} 2811}
1959 2812
1960static void noinline 2813static void noinline ecb_cold
1961array_verify (EV_P_ W *ws, int cnt) 2814array_verify (EV_P_ W *ws, int cnt)
1962{ 2815{
1963 while (cnt--) 2816 while (cnt--)
1964 { 2817 {
1965 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2818 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1967 } 2820 }
1968} 2821}
1969#endif 2822#endif
1970 2823
1971#if EV_FEATURE_API 2824#if EV_FEATURE_API
1972void 2825void ecb_cold
1973ev_verify (EV_P) 2826ev_verify (EV_P) EV_THROW
1974{ 2827{
1975#if EV_VERIFY 2828#if EV_VERIFY
1976 int i; 2829 int i;
1977 WL w; 2830 WL w, w2;
1978 2831
1979 assert (activecnt >= -1); 2832 assert (activecnt >= -1);
1980 2833
1981 assert (fdchangemax >= fdchangecnt); 2834 assert (fdchangemax >= fdchangecnt);
1982 for (i = 0; i < fdchangecnt; ++i) 2835 for (i = 0; i < fdchangecnt; ++i)
1983 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 2836 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1984 2837
1985 assert (anfdmax >= 0); 2838 assert (anfdmax >= 0);
1986 for (i = 0; i < anfdmax; ++i) 2839 for (i = 0; i < anfdmax; ++i)
2840 {
2841 int j = 0;
2842
1987 for (w = anfds [i].head; w; w = w->next) 2843 for (w = w2 = anfds [i].head; w; w = w->next)
1988 { 2844 {
1989 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
1990 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));
1991 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));
1992 } 2855 }
2856 }
1993 2857
1994 assert (timermax >= timercnt); 2858 assert (timermax >= timercnt);
1995 verify_heap (EV_A_ timers, timercnt); 2859 verify_heap (EV_A_ timers, timercnt);
1996 2860
1997#if EV_PERIODIC_ENABLE 2861#if EV_PERIODIC_ENABLE
… …
2043#endif 2907#endif
2044} 2908}
2045#endif 2909#endif
2046 2910
2047#if EV_MULTIPLICITY 2911#if EV_MULTIPLICITY
2048struct ev_loop * 2912struct ev_loop * ecb_cold
2049#else 2913#else
2050int 2914int
2051#endif 2915#endif
2052ev_default_loop (unsigned int flags) 2916ev_default_loop (unsigned int flags) EV_THROW
2053{ 2917{
2054 if (!ev_default_loop_ptr) 2918 if (!ev_default_loop_ptr)
2055 { 2919 {
2056#if EV_MULTIPLICITY 2920#if EV_MULTIPLICITY
2057 EV_P = ev_default_loop_ptr = &default_loop_struct; 2921 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2076 2940
2077 return ev_default_loop_ptr; 2941 return ev_default_loop_ptr;
2078} 2942}
2079 2943
2080void 2944void
2081ev_loop_fork (EV_P) 2945ev_loop_fork (EV_P) EV_THROW
2082{ 2946{
2083 postfork = 1; /* must be in line with ev_default_fork */ 2947 postfork = 1;
2084} 2948}
2085 2949
2086/*****************************************************************************/ 2950/*****************************************************************************/
2087 2951
2088void 2952void
… …
2090{ 2954{
2091 EV_CB_INVOKE ((W)w, revents); 2955 EV_CB_INVOKE ((W)w, revents);
2092} 2956}
2093 2957
2094unsigned int 2958unsigned int
2095ev_pending_count (EV_P) 2959ev_pending_count (EV_P) EV_THROW
2096{ 2960{
2097 int pri; 2961 int pri;
2098 unsigned int count = 0; 2962 unsigned int count = 0;
2099 2963
2100 for (pri = NUMPRI; pri--; ) 2964 for (pri = NUMPRI; pri--; )
… …
2104} 2968}
2105 2969
2106void noinline 2970void noinline
2107ev_invoke_pending (EV_P) 2971ev_invoke_pending (EV_P)
2108{ 2972{
2109 int pri; 2973 pendingpri = NUMPRI;
2110 2974
2111 for (pri = NUMPRI; pri--; ) 2975 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
2976 {
2977 --pendingpri;
2978
2112 while (pendingcnt [pri]) 2979 while (pendingcnt [pendingpri])
2113 { 2980 {
2114 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2981 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2115 2982
2116 p->w->pending = 0; 2983 p->w->pending = 0;
2117 EV_CB_INVOKE (p->w, p->events); 2984 EV_CB_INVOKE (p->w, p->events);
2118 EV_FREQUENT_CHECK; 2985 EV_FREQUENT_CHECK;
2119 } 2986 }
2987 }
2120} 2988}
2121 2989
2122#if EV_IDLE_ENABLE 2990#if EV_IDLE_ENABLE
2123/* make idle watchers pending. this handles the "call-idle */ 2991/* make idle watchers pending. this handles the "call-idle */
2124/* only when higher priorities are idle" logic */ 2992/* only when higher priorities are idle" logic */
… …
2181 feed_reverse_done (EV_A_ EV_TIMER); 3049 feed_reverse_done (EV_A_ EV_TIMER);
2182 } 3050 }
2183} 3051}
2184 3052
2185#if EV_PERIODIC_ENABLE 3053#if EV_PERIODIC_ENABLE
3054
3055static void noinline
3056periodic_recalc (EV_P_ ev_periodic *w)
3057{
3058 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3059 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / 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;
3077}
3078
2186/* make periodics pending */ 3079/* make periodics pending */
2187inline_size void 3080inline_size void
2188periodics_reify (EV_P) 3081periodics_reify (EV_P)
2189{ 3082{
2190 EV_FREQUENT_CHECK; 3083 EV_FREQUENT_CHECK;
2191 3084
2192 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3085 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2193 { 3086 {
2194 int feed_count = 0;
2195
2196 do 3087 do
2197 { 3088 {
2198 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3089 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2199 3090
2200 /*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)));*/
… …
2209 ANHE_at_cache (periodics [HEAP0]); 3100 ANHE_at_cache (periodics [HEAP0]);
2210 downheap (periodics, periodiccnt, HEAP0); 3101 downheap (periodics, periodiccnt, HEAP0);
2211 } 3102 }
2212 else if (w->interval) 3103 else if (w->interval)
2213 { 3104 {
2214 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3105 periodic_recalc (EV_A_ w);
2215 /* if next trigger time is not sufficiently in the future, put it there */
2216 /* this might happen because of floating point inexactness */
2217 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2218 {
2219 ev_at (w) += w->interval;
2220
2221 /* if interval is unreasonably low we might still have a time in the past */
2222 /* so correct this. this will make the periodic very inexact, but the user */
2223 /* has effectively asked to get triggered more often than possible */
2224 if (ev_at (w) < ev_rt_now)
2225 ev_at (w) = ev_rt_now;
2226 }
2227
2228 ANHE_at_cache (periodics [HEAP0]); 3106 ANHE_at_cache (periodics [HEAP0]);
2229 downheap (periodics, periodiccnt, HEAP0); 3107 downheap (periodics, periodiccnt, HEAP0);
2230 } 3108 }
2231 else 3109 else
2232 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3110 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2240 } 3118 }
2241} 3119}
2242 3120
2243/* simply recalculate all periodics */ 3121/* simply recalculate all periodics */
2244/* 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? */
2245static void noinline 3123static void noinline ecb_cold
2246periodics_reschedule (EV_P) 3124periodics_reschedule (EV_P)
2247{ 3125{
2248 int i; 3126 int i;
2249 3127
2250 /* adjust periodics after time jump */ 3128 /* adjust periodics after time jump */
… …
2253 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3131 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2254 3132
2255 if (w->reschedule_cb) 3133 if (w->reschedule_cb)
2256 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3134 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2257 else if (w->interval) 3135 else if (w->interval)
2258 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3136 periodic_recalc (EV_A_ w);
2259 3137
2260 ANHE_at_cache (periodics [i]); 3138 ANHE_at_cache (periodics [i]);
2261 } 3139 }
2262 3140
2263 reheap (periodics, periodiccnt); 3141 reheap (periodics, periodiccnt);
2264} 3142}
2265#endif 3143#endif
2266 3144
2267/* adjust all timers by a given offset */ 3145/* adjust all timers by a given offset */
2268static void noinline 3146static void noinline ecb_cold
2269timers_reschedule (EV_P_ ev_tstamp adjust) 3147timers_reschedule (EV_P_ ev_tstamp adjust)
2270{ 3148{
2271 int i; 3149 int i;
2272 3150
2273 for (i = 0; i < timercnt; ++i) 3151 for (i = 0; i < timercnt; ++i)
… …
2310 * 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
2311 * in the unlikely event of having been preempted here. 3189 * in the unlikely event of having been preempted here.
2312 */ 3190 */
2313 for (i = 4; --i; ) 3191 for (i = 4; --i; )
2314 { 3192 {
3193 ev_tstamp diff;
2315 rtmn_diff = ev_rt_now - mn_now; 3194 rtmn_diff = ev_rt_now - mn_now;
2316 3195
3196 diff = odiff - rtmn_diff;
3197
2317 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3198 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2318 return; /* all is well */ 3199 return; /* all is well */
2319 3200
2320 ev_rt_now = ev_time (); 3201 ev_rt_now = ev_time ();
2321 mn_now = get_clock (); 3202 mn_now = get_clock ();
2322 now_floor = mn_now; 3203 now_floor = mn_now;
… …
2344 3225
2345 mn_now = ev_rt_now; 3226 mn_now = ev_rt_now;
2346 } 3227 }
2347} 3228}
2348 3229
2349void 3230int
2350ev_run (EV_P_ int flags) 3231ev_run (EV_P_ int flags)
2351{ 3232{
2352#if EV_FEATURE_API 3233#if EV_FEATURE_API
2353 ++loop_depth; 3234 ++loop_depth;
2354#endif 3235#endif
… …
2412 ev_tstamp prev_mn_now = mn_now; 3293 ev_tstamp prev_mn_now = mn_now;
2413 3294
2414 /* update time to cancel out callback processing overhead */ 3295 /* update time to cancel out callback processing overhead */
2415 time_update (EV_A_ 1e100); 3296 time_update (EV_A_ 1e100);
2416 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
2417 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3303 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2418 { 3304 {
2419 waittime = MAX_BLOCKTIME; 3305 waittime = MAX_BLOCKTIME;
2420 3306
2421 if (timercnt) 3307 if (timercnt)
2422 { 3308 {
2423 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3309 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2424 if (waittime > to) waittime = to; 3310 if (waittime > to) waittime = to;
2425 } 3311 }
2426 3312
2427#if EV_PERIODIC_ENABLE 3313#if EV_PERIODIC_ENABLE
2428 if (periodiccnt) 3314 if (periodiccnt)
2429 { 3315 {
2430 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3316 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2431 if (waittime > to) waittime = to; 3317 if (waittime > to) waittime = to;
2432 } 3318 }
2433#endif 3319#endif
2434 3320
2435 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3321 /* don't let timeouts decrease the waittime below timeout_blocktime */
2436 if (expect_false (waittime < timeout_blocktime)) 3322 if (expect_false (waittime < timeout_blocktime))
2437 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;
2438 3329
2439 /* extra check because io_blocktime is commonly 0 */ 3330 /* extra check because io_blocktime is commonly 0 */
2440 if (expect_false (io_blocktime)) 3331 if (expect_false (io_blocktime))
2441 { 3332 {
2442 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3333 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2443 3334
2444 if (sleeptime > waittime - backend_fudge) 3335 if (sleeptime > waittime - backend_mintime)
2445 sleeptime = waittime - backend_fudge; 3336 sleeptime = waittime - backend_mintime;
2446 3337
2447 if (expect_true (sleeptime > 0.)) 3338 if (expect_true (sleeptime > 0.))
2448 { 3339 {
2449 ev_sleep (sleeptime); 3340 ev_sleep (sleeptime);
2450 waittime -= sleeptime; 3341 waittime -= sleeptime;
… …
2457#endif 3348#endif
2458 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3349 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2459 backend_poll (EV_A_ waittime); 3350 backend_poll (EV_A_ waittime);
2460 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3351 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2461 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
2462 /* update ev_rt_now, do magic */ 3363 /* update ev_rt_now, do magic */
2463 time_update (EV_A_ waittime + sleeptime); 3364 time_update (EV_A_ waittime + sleeptime);
2464 } 3365 }
2465 3366
2466 /* queue pending timers and reschedule them */ 3367 /* queue pending timers and reschedule them */
… …
2492 loop_done = EVBREAK_CANCEL; 3393 loop_done = EVBREAK_CANCEL;
2493 3394
2494#if EV_FEATURE_API 3395#if EV_FEATURE_API
2495 --loop_depth; 3396 --loop_depth;
2496#endif 3397#endif
3398
3399 return activecnt;
2497} 3400}
2498 3401
2499void 3402void
2500ev_break (EV_P_ int how) 3403ev_break (EV_P_ int how) EV_THROW
2501{ 3404{
2502 loop_done = how; 3405 loop_done = how;
2503} 3406}
2504 3407
2505void 3408void
2506ev_ref (EV_P) 3409ev_ref (EV_P) EV_THROW
2507{ 3410{
2508 ++activecnt; 3411 ++activecnt;
2509} 3412}
2510 3413
2511void 3414void
2512ev_unref (EV_P) 3415ev_unref (EV_P) EV_THROW
2513{ 3416{
2514 --activecnt; 3417 --activecnt;
2515} 3418}
2516 3419
2517void 3420void
2518ev_now_update (EV_P) 3421ev_now_update (EV_P) EV_THROW
2519{ 3422{
2520 time_update (EV_A_ 1e100); 3423 time_update (EV_A_ 1e100);
2521} 3424}
2522 3425
2523void 3426void
2524ev_suspend (EV_P) 3427ev_suspend (EV_P) EV_THROW
2525{ 3428{
2526 ev_now_update (EV_A); 3429 ev_now_update (EV_A);
2527} 3430}
2528 3431
2529void 3432void
2530ev_resume (EV_P) 3433ev_resume (EV_P) EV_THROW
2531{ 3434{
2532 ev_tstamp mn_prev = mn_now; 3435 ev_tstamp mn_prev = mn_now;
2533 3436
2534 ev_now_update (EV_A); 3437 ev_now_update (EV_A);
2535 timers_reschedule (EV_A_ mn_now - mn_prev); 3438 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2574 w->pending = 0; 3477 w->pending = 0;
2575 } 3478 }
2576} 3479}
2577 3480
2578int 3481int
2579ev_clear_pending (EV_P_ void *w) 3482ev_clear_pending (EV_P_ void *w) EV_THROW
2580{ 3483{
2581 W w_ = (W)w; 3484 W w_ = (W)w;
2582 int pending = w_->pending; 3485 int pending = w_->pending;
2583 3486
2584 if (expect_true (pending)) 3487 if (expect_true (pending))
… …
2617} 3520}
2618 3521
2619/*****************************************************************************/ 3522/*****************************************************************************/
2620 3523
2621void noinline 3524void noinline
2622ev_io_start (EV_P_ ev_io *w) 3525ev_io_start (EV_P_ ev_io *w) EV_THROW
2623{ 3526{
2624 int fd = w->fd; 3527 int fd = w->fd;
2625 3528
2626 if (expect_false (ev_is_active (w))) 3529 if (expect_false (ev_is_active (w)))
2627 return; 3530 return;
… …
2633 3536
2634 ev_start (EV_A_ (W)w, 1); 3537 ev_start (EV_A_ (W)w, 1);
2635 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3538 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2636 wlist_add (&anfds[fd].head, (WL)w); 3539 wlist_add (&anfds[fd].head, (WL)w);
2637 3540
3541 /* common bug, apparently */
3542 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3543
2638 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);
2639 w->events &= ~EV__IOFDSET; 3545 w->events &= ~EV__IOFDSET;
2640 3546
2641 EV_FREQUENT_CHECK; 3547 EV_FREQUENT_CHECK;
2642} 3548}
2643 3549
2644void noinline 3550void noinline
2645ev_io_stop (EV_P_ ev_io *w) 3551ev_io_stop (EV_P_ ev_io *w) EV_THROW
2646{ 3552{
2647 clear_pending (EV_A_ (W)w); 3553 clear_pending (EV_A_ (W)w);
2648 if (expect_false (!ev_is_active (w))) 3554 if (expect_false (!ev_is_active (w)))
2649 return; 3555 return;
2650 3556
… …
2659 3565
2660 EV_FREQUENT_CHECK; 3566 EV_FREQUENT_CHECK;
2661} 3567}
2662 3568
2663void noinline 3569void noinline
2664ev_timer_start (EV_P_ ev_timer *w) 3570ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2665{ 3571{
2666 if (expect_false (ev_is_active (w))) 3572 if (expect_false (ev_is_active (w)))
2667 return; 3573 return;
2668 3574
2669 ev_at (w) += mn_now; 3575 ev_at (w) += mn_now;
… …
2683 3589
2684 /*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));*/
2685} 3591}
2686 3592
2687void noinline 3593void noinline
2688ev_timer_stop (EV_P_ ev_timer *w) 3594ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2689{ 3595{
2690 clear_pending (EV_A_ (W)w); 3596 clear_pending (EV_A_ (W)w);
2691 if (expect_false (!ev_is_active (w))) 3597 if (expect_false (!ev_is_active (w)))
2692 return; 3598 return;
2693 3599
… …
2713 3619
2714 EV_FREQUENT_CHECK; 3620 EV_FREQUENT_CHECK;
2715} 3621}
2716 3622
2717void noinline 3623void noinline
2718ev_timer_again (EV_P_ ev_timer *w) 3624ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2719{ 3625{
2720 EV_FREQUENT_CHECK; 3626 EV_FREQUENT_CHECK;
3627
3628 clear_pending (EV_A_ (W)w);
2721 3629
2722 if (ev_is_active (w)) 3630 if (ev_is_active (w))
2723 { 3631 {
2724 if (w->repeat) 3632 if (w->repeat)
2725 { 3633 {
… …
2738 3646
2739 EV_FREQUENT_CHECK; 3647 EV_FREQUENT_CHECK;
2740} 3648}
2741 3649
2742ev_tstamp 3650ev_tstamp
2743ev_timer_remaining (EV_P_ ev_timer *w) 3651ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
2744{ 3652{
2745 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 3653 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2746} 3654}
2747 3655
2748#if EV_PERIODIC_ENABLE 3656#if EV_PERIODIC_ENABLE
2749void noinline 3657void noinline
2750ev_periodic_start (EV_P_ ev_periodic *w) 3658ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2751{ 3659{
2752 if (expect_false (ev_is_active (w))) 3660 if (expect_false (ev_is_active (w)))
2753 return; 3661 return;
2754 3662
2755 if (w->reschedule_cb) 3663 if (w->reschedule_cb)
2756 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3664 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2757 else if (w->interval) 3665 else if (w->interval)
2758 { 3666 {
2759 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 3667 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2760 /* this formula differs from the one in periodic_reify because we do not always round up */ 3668 periodic_recalc (EV_A_ w);
2761 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2762 } 3669 }
2763 else 3670 else
2764 ev_at (w) = w->offset; 3671 ev_at (w) = w->offset;
2765 3672
2766 EV_FREQUENT_CHECK; 3673 EV_FREQUENT_CHECK;
… …
2776 3683
2777 /*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));*/
2778} 3685}
2779 3686
2780void noinline 3687void noinline
2781ev_periodic_stop (EV_P_ ev_periodic *w) 3688ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2782{ 3689{
2783 clear_pending (EV_A_ (W)w); 3690 clear_pending (EV_A_ (W)w);
2784 if (expect_false (!ev_is_active (w))) 3691 if (expect_false (!ev_is_active (w)))
2785 return; 3692 return;
2786 3693
… …
2804 3711
2805 EV_FREQUENT_CHECK; 3712 EV_FREQUENT_CHECK;
2806} 3713}
2807 3714
2808void noinline 3715void noinline
2809ev_periodic_again (EV_P_ ev_periodic *w) 3716ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2810{ 3717{
2811 /* TODO: use adjustheap and recalculation */ 3718 /* TODO: use adjustheap and recalculation */
2812 ev_periodic_stop (EV_A_ w); 3719 ev_periodic_stop (EV_A_ w);
2813 ev_periodic_start (EV_A_ w); 3720 ev_periodic_start (EV_A_ w);
2814} 3721}
… …
2819#endif 3726#endif
2820 3727
2821#if EV_SIGNAL_ENABLE 3728#if EV_SIGNAL_ENABLE
2822 3729
2823void noinline 3730void noinline
2824ev_signal_start (EV_P_ ev_signal *w) 3731ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2825{ 3732{
2826 if (expect_false (ev_is_active (w))) 3733 if (expect_false (ev_is_active (w)))
2827 return; 3734 return;
2828 3735
2829 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));
… …
2831#if EV_MULTIPLICITY 3738#if EV_MULTIPLICITY
2832 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",
2833 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 3740 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2834 3741
2835 signals [w->signum - 1].loop = EV_A; 3742 signals [w->signum - 1].loop = EV_A;
3743 ECB_MEMORY_FENCE_RELEASE;
2836#endif 3744#endif
2837 3745
2838 EV_FREQUENT_CHECK; 3746 EV_FREQUENT_CHECK;
2839 3747
2840#if EV_USE_SIGNALFD 3748#if EV_USE_SIGNALFD
… …
2900 3808
2901 EV_FREQUENT_CHECK; 3809 EV_FREQUENT_CHECK;
2902} 3810}
2903 3811
2904void noinline 3812void noinline
2905ev_signal_stop (EV_P_ ev_signal *w) 3813ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2906{ 3814{
2907 clear_pending (EV_A_ (W)w); 3815 clear_pending (EV_A_ (W)w);
2908 if (expect_false (!ev_is_active (w))) 3816 if (expect_false (!ev_is_active (w)))
2909 return; 3817 return;
2910 3818
… …
2941#endif 3849#endif
2942 3850
2943#if EV_CHILD_ENABLE 3851#if EV_CHILD_ENABLE
2944 3852
2945void 3853void
2946ev_child_start (EV_P_ ev_child *w) 3854ev_child_start (EV_P_ ev_child *w) EV_THROW
2947{ 3855{
2948#if EV_MULTIPLICITY 3856#if EV_MULTIPLICITY
2949 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));
2950#endif 3858#endif
2951 if (expect_false (ev_is_active (w))) 3859 if (expect_false (ev_is_active (w)))
… …
2958 3866
2959 EV_FREQUENT_CHECK; 3867 EV_FREQUENT_CHECK;
2960} 3868}
2961 3869
2962void 3870void
2963ev_child_stop (EV_P_ ev_child *w) 3871ev_child_stop (EV_P_ ev_child *w) EV_THROW
2964{ 3872{
2965 clear_pending (EV_A_ (W)w); 3873 clear_pending (EV_A_ (W)w);
2966 if (expect_false (!ev_is_active (w))) 3874 if (expect_false (!ev_is_active (w)))
2967 return; 3875 return;
2968 3876
… …
2995# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 3903# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2996 3904
2997static void noinline 3905static void noinline
2998infy_add (EV_P_ ev_stat *w) 3906infy_add (EV_P_ ev_stat *w)
2999{ 3907{
3000 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);
3001 3912
3002 if (w->wd >= 0) 3913 if (w->wd >= 0)
3003 { 3914 {
3004 struct statfs sfs; 3915 struct statfs sfs;
3005 3916
… …
3009 3920
3010 if (!fs_2625) 3921 if (!fs_2625)
3011 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 3922 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3012 else if (!statfs (w->path, &sfs) 3923 else if (!statfs (w->path, &sfs)
3013 && (sfs.f_type == 0x1373 /* devfs */ 3924 && (sfs.f_type == 0x1373 /* devfs */
3925 || sfs.f_type == 0x4006 /* fat */
3926 || sfs.f_type == 0x4d44 /* msdos */
3014 || 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 */
3015 || sfs.f_type == 0x3153464a /* jfs */ 3931 || sfs.f_type == 0x3153464a /* jfs */
3932 || sfs.f_type == 0x9123683e /* btrfs */
3016 || sfs.f_type == 0x52654973 /* reiser3 */ 3933 || sfs.f_type == 0x52654973 /* reiser3 */
3017 || sfs.f_type == 0x01021994 /* tempfs */ 3934 || sfs.f_type == 0x01021994 /* tmpfs */
3018 || sfs.f_type == 0x58465342 /* xfs */)) 3935 || sfs.f_type == 0x58465342 /* xfs */))
3019 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 3936 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3020 else 3937 else
3021 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 */
3022 } 3939 }
… …
3043 if (!pend || pend == path) 3960 if (!pend || pend == path)
3044 break; 3961 break;
3045 3962
3046 *pend = 0; 3963 *pend = 0;
3047 w->wd = inotify_add_watch (fs_fd, path, mask); 3964 w->wd = inotify_add_watch (fs_fd, path, mask);
3048 } 3965 }
3049 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3966 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3050 } 3967 }
3051 } 3968 }
3052 3969
3053 if (w->wd >= 0) 3970 if (w->wd >= 0)
… …
3120 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4037 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3121 ofs += sizeof (struct inotify_event) + ev->len; 4038 ofs += sizeof (struct inotify_event) + ev->len;
3122 } 4039 }
3123} 4040}
3124 4041
3125inline_size void 4042inline_size void ecb_cold
3126ev_check_2625 (EV_P) 4043ev_check_2625 (EV_P)
3127{ 4044{
3128 /* kernels < 2.6.25 are borked 4045 /* kernels < 2.6.25 are borked
3129 * 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
3130 */ 4047 */
… …
3135} 4052}
3136 4053
3137inline_size int 4054inline_size int
3138infy_newfd (void) 4055infy_newfd (void)
3139{ 4056{
3140#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4057#if defined IN_CLOEXEC && defined IN_NONBLOCK
3141 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4058 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3142 if (fd >= 0) 4059 if (fd >= 0)
3143 return fd; 4060 return fd;
3144#endif 4061#endif
3145 return inotify_init (); 4062 return inotify_init ();
… …
3220#else 4137#else
3221# define EV_LSTAT(p,b) lstat (p, b) 4138# define EV_LSTAT(p,b) lstat (p, b)
3222#endif 4139#endif
3223 4140
3224void 4141void
3225ev_stat_stat (EV_P_ ev_stat *w) 4142ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3226{ 4143{
3227 if (lstat (w->path, &w->attr) < 0) 4144 if (lstat (w->path, &w->attr) < 0)
3228 w->attr.st_nlink = 0; 4145 w->attr.st_nlink = 0;
3229 else if (!w->attr.st_nlink) 4146 else if (!w->attr.st_nlink)
3230 w->attr.st_nlink = 1; 4147 w->attr.st_nlink = 1;
… …
3269 ev_feed_event (EV_A_ w, EV_STAT); 4186 ev_feed_event (EV_A_ w, EV_STAT);
3270 } 4187 }
3271} 4188}
3272 4189
3273void 4190void
3274ev_stat_start (EV_P_ ev_stat *w) 4191ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3275{ 4192{
3276 if (expect_false (ev_is_active (w))) 4193 if (expect_false (ev_is_active (w)))
3277 return; 4194 return;
3278 4195
3279 ev_stat_stat (EV_A_ w); 4196 ev_stat_stat (EV_A_ w);
… …
3300 4217
3301 EV_FREQUENT_CHECK; 4218 EV_FREQUENT_CHECK;
3302} 4219}
3303 4220
3304void 4221void
3305ev_stat_stop (EV_P_ ev_stat *w) 4222ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3306{ 4223{
3307 clear_pending (EV_A_ (W)w); 4224 clear_pending (EV_A_ (W)w);
3308 if (expect_false (!ev_is_active (w))) 4225 if (expect_false (!ev_is_active (w)))
3309 return; 4226 return;
3310 4227
… …
3326} 4243}
3327#endif 4244#endif
3328 4245
3329#if EV_IDLE_ENABLE 4246#if EV_IDLE_ENABLE
3330void 4247void
3331ev_idle_start (EV_P_ ev_idle *w) 4248ev_idle_start (EV_P_ ev_idle *w) EV_THROW
3332{ 4249{
3333 if (expect_false (ev_is_active (w))) 4250 if (expect_false (ev_is_active (w)))
3334 return; 4251 return;
3335 4252
3336 pri_adjust (EV_A_ (W)w); 4253 pri_adjust (EV_A_ (W)w);
… …
3349 4266
3350 EV_FREQUENT_CHECK; 4267 EV_FREQUENT_CHECK;
3351} 4268}
3352 4269
3353void 4270void
3354ev_idle_stop (EV_P_ ev_idle *w) 4271ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3355{ 4272{
3356 clear_pending (EV_A_ (W)w); 4273 clear_pending (EV_A_ (W)w);
3357 if (expect_false (!ev_is_active (w))) 4274 if (expect_false (!ev_is_active (w)))
3358 return; 4275 return;
3359 4276
… …
3373} 4290}
3374#endif 4291#endif
3375 4292
3376#if EV_PREPARE_ENABLE 4293#if EV_PREPARE_ENABLE
3377void 4294void
3378ev_prepare_start (EV_P_ ev_prepare *w) 4295ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
3379{ 4296{
3380 if (expect_false (ev_is_active (w))) 4297 if (expect_false (ev_is_active (w)))
3381 return; 4298 return;
3382 4299
3383 EV_FREQUENT_CHECK; 4300 EV_FREQUENT_CHECK;
… …
3388 4305
3389 EV_FREQUENT_CHECK; 4306 EV_FREQUENT_CHECK;
3390} 4307}
3391 4308
3392void 4309void
3393ev_prepare_stop (EV_P_ ev_prepare *w) 4310ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
3394{ 4311{
3395 clear_pending (EV_A_ (W)w); 4312 clear_pending (EV_A_ (W)w);
3396 if (expect_false (!ev_is_active (w))) 4313 if (expect_false (!ev_is_active (w)))
3397 return; 4314 return;
3398 4315
… …
3411} 4328}
3412#endif 4329#endif
3413 4330
3414#if EV_CHECK_ENABLE 4331#if EV_CHECK_ENABLE
3415void 4332void
3416ev_check_start (EV_P_ ev_check *w) 4333ev_check_start (EV_P_ ev_check *w) EV_THROW
3417{ 4334{
3418 if (expect_false (ev_is_active (w))) 4335 if (expect_false (ev_is_active (w)))
3419 return; 4336 return;
3420 4337
3421 EV_FREQUENT_CHECK; 4338 EV_FREQUENT_CHECK;
… …
3426 4343
3427 EV_FREQUENT_CHECK; 4344 EV_FREQUENT_CHECK;
3428} 4345}
3429 4346
3430void 4347void
3431ev_check_stop (EV_P_ ev_check *w) 4348ev_check_stop (EV_P_ ev_check *w) EV_THROW
3432{ 4349{
3433 clear_pending (EV_A_ (W)w); 4350 clear_pending (EV_A_ (W)w);
3434 if (expect_false (!ev_is_active (w))) 4351 if (expect_false (!ev_is_active (w)))
3435 return; 4352 return;
3436 4353
… …
3449} 4366}
3450#endif 4367#endif
3451 4368
3452#if EV_EMBED_ENABLE 4369#if EV_EMBED_ENABLE
3453void noinline 4370void noinline
3454ev_embed_sweep (EV_P_ ev_embed *w) 4371ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
3455{ 4372{
3456 ev_run (w->other, EVRUN_NOWAIT); 4373 ev_run (w->other, EVRUN_NOWAIT);
3457} 4374}
3458 4375
3459static void 4376static void
… …
3507 ev_idle_stop (EV_A_ idle); 4424 ev_idle_stop (EV_A_ idle);
3508} 4425}
3509#endif 4426#endif
3510 4427
3511void 4428void
3512ev_embed_start (EV_P_ ev_embed *w) 4429ev_embed_start (EV_P_ ev_embed *w) EV_THROW
3513{ 4430{
3514 if (expect_false (ev_is_active (w))) 4431 if (expect_false (ev_is_active (w)))
3515 return; 4432 return;
3516 4433
3517 { 4434 {
… …
3538 4455
3539 EV_FREQUENT_CHECK; 4456 EV_FREQUENT_CHECK;
3540} 4457}
3541 4458
3542void 4459void
3543ev_embed_stop (EV_P_ ev_embed *w) 4460ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
3544{ 4461{
3545 clear_pending (EV_A_ (W)w); 4462 clear_pending (EV_A_ (W)w);
3546 if (expect_false (!ev_is_active (w))) 4463 if (expect_false (!ev_is_active (w)))
3547 return; 4464 return;
3548 4465
… …
3558} 4475}
3559#endif 4476#endif
3560 4477
3561#if EV_FORK_ENABLE 4478#if EV_FORK_ENABLE
3562void 4479void
3563ev_fork_start (EV_P_ ev_fork *w) 4480ev_fork_start (EV_P_ ev_fork *w) EV_THROW
3564{ 4481{
3565 if (expect_false (ev_is_active (w))) 4482 if (expect_false (ev_is_active (w)))
3566 return; 4483 return;
3567 4484
3568 EV_FREQUENT_CHECK; 4485 EV_FREQUENT_CHECK;
… …
3573 4490
3574 EV_FREQUENT_CHECK; 4491 EV_FREQUENT_CHECK;
3575} 4492}
3576 4493
3577void 4494void
3578ev_fork_stop (EV_P_ ev_fork *w) 4495ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
3579{ 4496{
3580 clear_pending (EV_A_ (W)w); 4497 clear_pending (EV_A_ (W)w);
3581 if (expect_false (!ev_is_active (w))) 4498 if (expect_false (!ev_is_active (w)))
3582 return; 4499 return;
3583 4500
… …
3596} 4513}
3597#endif 4514#endif
3598 4515
3599#if EV_CLEANUP_ENABLE 4516#if EV_CLEANUP_ENABLE
3600void 4517void
3601ev_cleanup_start (EV_P_ ev_cleanup *w) 4518ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
3602{ 4519{
3603 if (expect_false (ev_is_active (w))) 4520 if (expect_false (ev_is_active (w)))
3604 return; 4521 return;
3605 4522
3606 EV_FREQUENT_CHECK; 4523 EV_FREQUENT_CHECK;
… …
3613 ev_unref (EV_A); 4530 ev_unref (EV_A);
3614 EV_FREQUENT_CHECK; 4531 EV_FREQUENT_CHECK;
3615} 4532}
3616 4533
3617void 4534void
3618ev_cleanup_stop (EV_P_ ev_cleanup *w) 4535ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
3619{ 4536{
3620 clear_pending (EV_A_ (W)w); 4537 clear_pending (EV_A_ (W)w);
3621 if (expect_false (!ev_is_active (w))) 4538 if (expect_false (!ev_is_active (w)))
3622 return; 4539 return;
3623 4540
… …
3637} 4554}
3638#endif 4555#endif
3639 4556
3640#if EV_ASYNC_ENABLE 4557#if EV_ASYNC_ENABLE
3641void 4558void
3642ev_async_start (EV_P_ ev_async *w) 4559ev_async_start (EV_P_ ev_async *w) EV_THROW
3643{ 4560{
3644 if (expect_false (ev_is_active (w))) 4561 if (expect_false (ev_is_active (w)))
3645 return; 4562 return;
3646 4563
3647 w->sent = 0; 4564 w->sent = 0;
… …
3656 4573
3657 EV_FREQUENT_CHECK; 4574 EV_FREQUENT_CHECK;
3658} 4575}
3659 4576
3660void 4577void
3661ev_async_stop (EV_P_ ev_async *w) 4578ev_async_stop (EV_P_ ev_async *w) EV_THROW
3662{ 4579{
3663 clear_pending (EV_A_ (W)w); 4580 clear_pending (EV_A_ (W)w);
3664 if (expect_false (!ev_is_active (w))) 4581 if (expect_false (!ev_is_active (w)))
3665 return; 4582 return;
3666 4583
… …
3677 4594
3678 EV_FREQUENT_CHECK; 4595 EV_FREQUENT_CHECK;
3679} 4596}
3680 4597
3681void 4598void
3682ev_async_send (EV_P_ ev_async *w) 4599ev_async_send (EV_P_ ev_async *w) EV_THROW
3683{ 4600{
3684 w->sent = 1; 4601 w->sent = 1;
3685 evpipe_write (EV_A_ &async_pending); 4602 evpipe_write (EV_A_ &async_pending);
3686} 4603}
3687#endif 4604#endif
… …
3724 4641
3725 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));
3726} 4643}
3727 4644
3728void 4645void
3729ev_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
3730{ 4647{
3731 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));
3732 4649
3733 if (expect_false (!once)) 4650 if (expect_false (!once))
3734 { 4651 {
… …
3755} 4672}
3756 4673
3757/*****************************************************************************/ 4674/*****************************************************************************/
3758 4675
3759#if EV_WALK_ENABLE 4676#if EV_WALK_ENABLE
3760void 4677void ecb_cold
3761ev_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
3762{ 4679{
3763 int i, j; 4680 int i, j;
3764 ev_watcher_list *wl, *wn; 4681 ev_watcher_list *wl, *wn;
3765 4682
3766 if (types & (EV_IO | EV_EMBED)) 4683 if (types & (EV_IO | EV_EMBED))
… …
3809 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4726 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3810#endif 4727#endif
3811 4728
3812#if EV_IDLE_ENABLE 4729#if EV_IDLE_ENABLE
3813 if (types & EV_IDLE) 4730 if (types & EV_IDLE)
3814 for (j = NUMPRI; i--; ) 4731 for (j = NUMPRI; j--; )
3815 for (i = idlecnt [j]; i--; ) 4732 for (i = idlecnt [j]; i--; )
3816 cb (EV_A_ EV_IDLE, idles [j][i]); 4733 cb (EV_A_ EV_IDLE, idles [j][i]);
3817#endif 4734#endif
3818 4735
3819#if EV_FORK_ENABLE 4736#if EV_FORK_ENABLE
… …
3872 4789
3873#if EV_MULTIPLICITY 4790#if EV_MULTIPLICITY
3874 #include "ev_wrap.h" 4791 #include "ev_wrap.h"
3875#endif 4792#endif
3876 4793
3877EV_CPP(})
3878

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