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Comparing libev/ev.c (file contents):
Revision 1.343 by root, Fri Apr 2 21:03:46 2010 UTC vs.
Revision 1.457 by root, Thu Sep 5 18:45:29 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 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,
… …
35 * and other provisions required by the GPL. If you do not delete the 35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under 36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL. 37 * either the BSD or the GPL.
38 */ 38 */
39 39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */ 40/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
47# include EV_CONFIG_H 43# include EV_CONFIG_H
48# else 44# else
49# include "config.h" 45# include "config.h"
50# endif 46# endif
47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
51 53
52# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
… …
57# endif 59# endif
58# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
60# endif 62# endif
61# endif 63# endif
62# elif !defined(EV_USE_CLOCK_SYSCALL) 64# elif !defined EV_USE_CLOCK_SYSCALL
63# define EV_USE_CLOCK_SYSCALL 0 65# define EV_USE_CLOCK_SYSCALL 0
64# endif 66# endif
65 67
66# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
67# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
… …
160# define EV_USE_EVENTFD 0 162# define EV_USE_EVENTFD 0
161# endif 163# endif
162 164
163#endif 165#endif
164 166
165#include <math.h>
166#include <stdlib.h> 167#include <stdlib.h>
167#include <string.h> 168#include <string.h>
168#include <fcntl.h> 169#include <fcntl.h>
169#include <stddef.h> 170#include <stddef.h>
170 171
… …
180 181
181#ifdef EV_H 182#ifdef EV_H
182# include EV_H 183# include EV_H
183#else 184#else
184# include "ev.h" 185# include "ev.h"
186#endif
187
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
185#endif 197#endif
186 198
187#ifndef _WIN32 199#ifndef _WIN32
188# include <sys/time.h> 200# include <sys/time.h>
189# include <sys/wait.h> 201# include <sys/wait.h>
190# include <unistd.h> 202# include <unistd.h>
191#else 203#else
192# include <io.h> 204# include <io.h>
193# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
194# include <windows.h> 207# include <windows.h>
195# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
196# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
197# endif 210# endif
198# undef EV_AVOID_STDIO 211# undef EV_AVOID_STDIO
199#endif 212#endif
200 213
214/* OS X, in its infinite idiocy, actually HARDCODES
215 * a limit of 1024 into their select. Where people have brains,
216 * OS X engineers apparently have a vacuum. Or maybe they were
217 * ordered to have a vacuum, or they do anything for money.
218 * This might help. Or not.
219 */
220#define _DARWIN_UNLIMITED_SELECT 1
221
201/* 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 */
202 223
203/* try to deduce the maximum number of signals on this platform */ 224/* try to deduce the maximum number of signals on this platform */
204#if defined (EV_NSIG) 225#if defined EV_NSIG
205/* use what's provided */ 226/* use what's provided */
206#elif defined (NSIG) 227#elif defined NSIG
207# define EV_NSIG (NSIG) 228# define EV_NSIG (NSIG)
208#elif defined(_NSIG) 229#elif defined _NSIG
209# define EV_NSIG (_NSIG) 230# define EV_NSIG (_NSIG)
210#elif defined (SIGMAX) 231#elif defined SIGMAX
211# define EV_NSIG (SIGMAX+1) 232# define EV_NSIG (SIGMAX+1)
212#elif defined (SIG_MAX) 233#elif defined SIG_MAX
213# define EV_NSIG (SIG_MAX+1) 234# define EV_NSIG (SIG_MAX+1)
214#elif defined (_SIG_MAX) 235#elif defined _SIG_MAX
215# define EV_NSIG (_SIG_MAX+1) 236# define EV_NSIG (_SIG_MAX+1)
216#elif defined (MAXSIG) 237#elif defined MAXSIG
217# define EV_NSIG (MAXSIG+1) 238# define EV_NSIG (MAXSIG+1)
218#elif defined (MAX_SIG) 239#elif defined MAX_SIG
219# define EV_NSIG (MAX_SIG+1) 240# define EV_NSIG (MAX_SIG+1)
220#elif defined (SIGARRAYSIZE) 241#elif defined SIGARRAYSIZE
221# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
222#elif defined (_sys_nsig) 243#elif defined _sys_nsig
223# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
224#else 245#else
225# error "unable to find value for NSIG, please report" 246# error "unable to find value for NSIG, please report"
226/* to make it compile regardless, just remove the above line, */ 247/* to make it compile regardless, just remove the above line, */
227/* but consider reporting it, too! :) */ 248/* but consider reporting it, too! :) */
228# define EV_NSIG 65 249# define EV_NSIG 65
229#endif 250#endif
230 251
252#ifndef EV_USE_FLOOR
253# define EV_USE_FLOOR 0
254#endif
255
231#ifndef EV_USE_CLOCK_SYSCALL 256#ifndef EV_USE_CLOCK_SYSCALL
232# if __linux && __GLIBC__ >= 2 257# if __linux && __GLIBC__ >= 2
233# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 258# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
234# else 259# else
235# define EV_USE_CLOCK_SYSCALL 0 260# define EV_USE_CLOCK_SYSCALL 0
236# endif 261# endif
237#endif 262#endif
238 263
239#ifndef EV_USE_MONOTONIC 264#ifndef EV_USE_MONOTONIC
240# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 265# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
241# define EV_USE_MONOTONIC EV_FEATURE_OS 266# define EV_USE_MONOTONIC EV_FEATURE_OS
242# else 267# else
243# define EV_USE_MONOTONIC 0 268# define EV_USE_MONOTONIC 0
244# endif 269# endif
245#endif 270#endif
… …
332 357
333#ifndef EV_HEAP_CACHE_AT 358#ifndef EV_HEAP_CACHE_AT
334# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 359# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
335#endif 360#endif
336 361
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
337/* 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, */
338/* which makes programs even slower. might work on other unices, too. */ 379/* which makes programs even slower. might work on other unices, too. */
339#if EV_USE_CLOCK_SYSCALL 380#if EV_USE_CLOCK_SYSCALL
340# include <syscall.h> 381# include <sys/syscall.h>
341# ifdef SYS_clock_gettime 382# ifdef SYS_clock_gettime
342# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 383# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
343# undef EV_USE_MONOTONIC 384# undef EV_USE_MONOTONIC
344# define EV_USE_MONOTONIC 1 385# define EV_USE_MONOTONIC 1
345# else 386# else
… …
348# endif 389# endif
349#endif 390#endif
350 391
351/* 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 */
352 393
353#ifdef _AIX
354/* AIX has a completely broken poll.h header */
355# undef EV_USE_POLL
356# define EV_USE_POLL 0
357#endif
358
359#ifndef CLOCK_MONOTONIC 394#ifndef CLOCK_MONOTONIC
360# undef EV_USE_MONOTONIC 395# undef EV_USE_MONOTONIC
361# define EV_USE_MONOTONIC 0 396# define EV_USE_MONOTONIC 0
362#endif 397#endif
363 398
… …
370# undef EV_USE_INOTIFY 405# undef EV_USE_INOTIFY
371# define EV_USE_INOTIFY 0 406# define EV_USE_INOTIFY 0
372#endif 407#endif
373 408
374#if !EV_USE_NANOSLEEP 409#if !EV_USE_NANOSLEEP
375# ifndef _WIN32 410/* hp-ux has it in sys/time.h, which we unconditionally include above */
411# if !defined _WIN32 && !defined __hpux
376# include <sys/select.h> 412# include <sys/select.h>
377# endif 413# endif
378#endif 414#endif
379 415
380#if EV_USE_INOTIFY 416#if EV_USE_INOTIFY
381# include <sys/utsname.h>
382# include <sys/statfs.h> 417# include <sys/statfs.h>
383# include <sys/inotify.h> 418# include <sys/inotify.h>
384/* 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 */
385# ifndef IN_DONT_FOLLOW 420# ifndef IN_DONT_FOLLOW
386# undef EV_USE_INOTIFY 421# undef EV_USE_INOTIFY
387# define EV_USE_INOTIFY 0 422# define EV_USE_INOTIFY 0
388# endif 423# endif
389#endif
390
391#if EV_SELECT_IS_WINSOCKET
392# include <winsock.h>
393#endif 424#endif
394 425
395#if EV_USE_EVENTFD 426#if EV_USE_EVENTFD
396/* 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 */
397# include <stdint.h> 428# include <stdint.h>
… …
403# define EFD_CLOEXEC O_CLOEXEC 434# define EFD_CLOEXEC O_CLOEXEC
404# else 435# else
405# define EFD_CLOEXEC 02000000 436# define EFD_CLOEXEC 02000000
406# endif 437# endif
407# endif 438# endif
408# ifdef __cplusplus
409extern "C" {
410# endif
411int (eventfd) (unsigned int initval, int flags); 439EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
412# ifdef __cplusplus
413}
414# endif
415#endif 440#endif
416 441
417#if EV_USE_SIGNALFD 442#if EV_USE_SIGNALFD
418/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 443/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
419# include <stdint.h> 444# include <stdint.h>
… …
425# define SFD_CLOEXEC O_CLOEXEC 450# define SFD_CLOEXEC O_CLOEXEC
426# else 451# else
427# define SFD_CLOEXEC 02000000 452# define SFD_CLOEXEC 02000000
428# endif 453# endif
429# endif 454# endif
430# ifdef __cplusplus
431extern "C" {
432# endif
433int signalfd (int fd, const sigset_t *mask, int flags); 455EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
434 456
435struct signalfd_siginfo 457struct signalfd_siginfo
436{ 458{
437 uint32_t ssi_signo; 459 uint32_t ssi_signo;
438 char pad[128 - sizeof (uint32_t)]; 460 char pad[128 - sizeof (uint32_t)];
439}; 461};
440# ifdef __cplusplus
441}
442# endif 462#endif
443#endif
444
445 463
446/**/ 464/**/
447 465
448#if EV_VERIFY >= 3 466#if EV_VERIFY >= 3
449# define EV_FREQUENT_CHECK ev_verify (EV_A) 467# define EV_FREQUENT_CHECK ev_verify (EV_A)
450#else 468#else
451# define EV_FREQUENT_CHECK do { } while (0) 469# define EV_FREQUENT_CHECK do { } while (0)
452#endif 470#endif
453 471
454/* 472/*
455 * This is used to avoid floating point rounding problems. 473 * This is used to work around floating point rounding problems.
456 * It is added to ev_rt_now when scheduling periodics
457 * to ensure progress, time-wise, even when rounding
458 * errors are against us.
459 * This value is good at least till the year 4000. 474 * This value is good at least till the year 4000.
460 * Better solutions welcome.
461 */ 475 */
462#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 */
463 478
464#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) */
465#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) */
466 481
482#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } 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)
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 0x00010003
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;
467#if __GNUC__ >= 4 529 #if __GNUC__
468# define expect(expr,value) __builtin_expect ((expr),(value)) 530 typedef signed long long int64_t;
469# 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
470#else 545#else
471# define expect(expr,value) (expr) 546 #include <inttypes.h>
472# define noinline 547 #if UINTMAX_MAX > 0xffffffffU
473# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 548 #define ECB_PTRSIZE 8
474# define inline 549 #else
550 #define ECB_PTRSIZE 4
551 #endif
475# endif 552#endif
553
554/* work around x32 idiocy by defining proper macros */
555#if __x86_64 || _M_AMD64
556 #if __ILP32
557 #define ECB_AMD64_X32 1
558 #else
559 #define ECB_AMD64 1
476#endif 560 #endif
561#endif
477 562
563/* many compilers define _GNUC_ to some versions but then only implement
564 * what their idiot authors think are the "more important" extensions,
565 * causing enormous grief in return for some better fake benchmark numbers.
566 * or so.
567 * we try to detect these and simply assume they are not gcc - if they have
568 * an issue with that they should have done it right in the first place.
569 */
570#ifndef ECB_GCC_VERSION
571 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
572 #define ECB_GCC_VERSION(major,minor) 0
573 #else
574 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
575 #endif
576#endif
577
578#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
579#define ECB_C99 (__STDC_VERSION__ >= 199901L)
580#define ECB_C11 (__STDC_VERSION__ >= 201112L)
581#define ECB_CPP (__cplusplus+0)
582#define ECB_CPP11 (__cplusplus >= 201103L)
583
584#if ECB_CPP
585 #define ECB_EXTERN_C extern "C"
586 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
587 #define ECB_EXTERN_C_END }
588#else
589 #define ECB_EXTERN_C extern
590 #define ECB_EXTERN_C_BEG
591 #define ECB_EXTERN_C_END
592#endif
593
594/*****************************************************************************/
595
596/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
597/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
598
599#if ECB_NO_THREADS
600 #define ECB_NO_SMP 1
601#endif
602
603#if ECB_NO_SMP
604 #define ECB_MEMORY_FENCE do { } while (0)
605#endif
606
607#ifndef ECB_MEMORY_FENCE
608 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
609 #if __i386 || __i386__
610 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
611 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
612 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
613 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
614 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
615 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
616 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
617 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
618 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
619 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
620 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
621 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
622 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
623 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
624 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
625 #elif __sparc || __sparc__
626 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
627 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
628 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
629 #elif defined __s390__ || defined __s390x__
630 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
631 #elif defined __mips__
632 /* GNU/Linux emulates sync on mips1 architectures, so we force it's use */
633 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
634 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
635 #elif defined __alpha__
636 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
637 #elif defined __hppa__
638 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
639 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
640 #elif defined __ia64__
641 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
642 #elif defined __m68k__
643 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
644 #elif defined __m88k__
645 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
646 #elif defined __sh__
647 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
648 #endif
649 #endif
650#endif
651
652#ifndef ECB_MEMORY_FENCE
653 #if ECB_GCC_VERSION(4,7)
654 /* see comment below (stdatomic.h) about the C11 memory model. */
655 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
656
657 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
658 * without risking compile time errors with other compilers. We *could*
659 * define our own ecb_clang_has_feature, but I just can't be bothered to work
660 * around this shit time and again.
661 * #elif defined __clang && __has_feature (cxx_atomic)
662 * // see comment below (stdatomic.h) about the C11 memory model.
663 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
664 */
665
666 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
667 #define ECB_MEMORY_FENCE __sync_synchronize ()
668 #elif _MSC_VER >= 1400 /* VC++ 2005 */
669 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
670 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
671 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
672 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
673 #elif defined _WIN32
674 #include <WinNT.h>
675 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
676 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
677 #include <mbarrier.h>
678 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
679 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
680 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
681 #elif __xlC__
682 #define ECB_MEMORY_FENCE __sync ()
683 #endif
684#endif
685
686#ifndef ECB_MEMORY_FENCE
687 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
688 /* we assume that these memory fences work on all variables/all memory accesses, */
689 /* not just C11 atomics and atomic accesses */
690 #include <stdatomic.h>
691 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
692 /* any fence other than seq_cst, which isn't very efficient for us. */
693 /* Why that is, we don't know - either the C11 memory model is quite useless */
694 /* for most usages, or gcc and clang have a bug */
695 /* I *currently* lean towards the latter, and inefficiently implement */
696 /* all three of ecb's fences as a seq_cst fence */
697 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
698 #endif
699#endif
700
701#ifndef ECB_MEMORY_FENCE
702 #if !ECB_AVOID_PTHREADS
703 /*
704 * if you get undefined symbol references to pthread_mutex_lock,
705 * or failure to find pthread.h, then you should implement
706 * the ECB_MEMORY_FENCE operations for your cpu/compiler
707 * OR provide pthread.h and link against the posix thread library
708 * of your system.
709 */
710 #include <pthread.h>
711 #define ECB_NEEDS_PTHREADS 1
712 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
713
714 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
715 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
716 #endif
717#endif
718
719#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
720 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
721#endif
722
723#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
724 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
725#endif
726
727/*****************************************************************************/
728
729#if __cplusplus
730 #define ecb_inline static inline
731#elif ECB_GCC_VERSION(2,5)
732 #define ecb_inline static __inline__
733#elif ECB_C99
734 #define ecb_inline static inline
735#else
736 #define ecb_inline static
737#endif
738
739#if ECB_GCC_VERSION(3,3)
740 #define ecb_restrict __restrict__
741#elif ECB_C99
742 #define ecb_restrict restrict
743#else
744 #define ecb_restrict
745#endif
746
747typedef int ecb_bool;
748
749#define ECB_CONCAT_(a, b) a ## b
750#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
751#define ECB_STRINGIFY_(a) # a
752#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
753
754#define ecb_function_ ecb_inline
755
756#if ECB_GCC_VERSION(3,1)
757 #define ecb_attribute(attrlist) __attribute__(attrlist)
758 #define ecb_is_constant(expr) __builtin_constant_p (expr)
759 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
760 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
761#else
762 #define ecb_attribute(attrlist)
763 #define ecb_is_constant(expr) 0
764 #define ecb_expect(expr,value) (expr)
765 #define ecb_prefetch(addr,rw,locality)
766#endif
767
768/* no emulation for ecb_decltype */
769#if ECB_GCC_VERSION(4,5)
770 #define ecb_decltype(x) __decltype(x)
771#elif ECB_GCC_VERSION(3,0)
772 #define ecb_decltype(x) __typeof(x)
773#endif
774
775#define ecb_noinline ecb_attribute ((__noinline__))
776#define ecb_unused ecb_attribute ((__unused__))
777#define ecb_const ecb_attribute ((__const__))
778#define ecb_pure ecb_attribute ((__pure__))
779
780#if ECB_C11
781 #define ecb_noreturn _Noreturn
782#else
783 #define ecb_noreturn ecb_attribute ((__noreturn__))
784#endif
785
786#if ECB_GCC_VERSION(4,3)
787 #define ecb_artificial ecb_attribute ((__artificial__))
788 #define ecb_hot ecb_attribute ((__hot__))
789 #define ecb_cold ecb_attribute ((__cold__))
790#else
791 #define ecb_artificial
792 #define ecb_hot
793 #define ecb_cold
794#endif
795
796/* put around conditional expressions if you are very sure that the */
797/* expression is mostly true or mostly false. note that these return */
798/* booleans, not the expression. */
478#define expect_false(expr) expect ((expr) != 0, 0) 799#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
479#define expect_true(expr) expect ((expr) != 0, 1) 800#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
801/* for compatibility to the rest of the world */
802#define ecb_likely(expr) ecb_expect_true (expr)
803#define ecb_unlikely(expr) ecb_expect_false (expr)
804
805/* count trailing zero bits and count # of one bits */
806#if ECB_GCC_VERSION(3,4)
807 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
808 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
809 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
810 #define ecb_ctz32(x) __builtin_ctz (x)
811 #define ecb_ctz64(x) __builtin_ctzll (x)
812 #define ecb_popcount32(x) __builtin_popcount (x)
813 /* no popcountll */
814#else
815 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
816 ecb_function_ int
817 ecb_ctz32 (uint32_t x)
818 {
819 int r = 0;
820
821 x &= ~x + 1; /* this isolates the lowest bit */
822
823#if ECB_branchless_on_i386
824 r += !!(x & 0xaaaaaaaa) << 0;
825 r += !!(x & 0xcccccccc) << 1;
826 r += !!(x & 0xf0f0f0f0) << 2;
827 r += !!(x & 0xff00ff00) << 3;
828 r += !!(x & 0xffff0000) << 4;
829#else
830 if (x & 0xaaaaaaaa) r += 1;
831 if (x & 0xcccccccc) r += 2;
832 if (x & 0xf0f0f0f0) r += 4;
833 if (x & 0xff00ff00) r += 8;
834 if (x & 0xffff0000) r += 16;
835#endif
836
837 return r;
838 }
839
840 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
841 ecb_function_ int
842 ecb_ctz64 (uint64_t x)
843 {
844 int shift = x & 0xffffffffU ? 0 : 32;
845 return ecb_ctz32 (x >> shift) + shift;
846 }
847
848 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
849 ecb_function_ int
850 ecb_popcount32 (uint32_t x)
851 {
852 x -= (x >> 1) & 0x55555555;
853 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
854 x = ((x >> 4) + x) & 0x0f0f0f0f;
855 x *= 0x01010101;
856
857 return x >> 24;
858 }
859
860 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
861 ecb_function_ int ecb_ld32 (uint32_t x)
862 {
863 int r = 0;
864
865 if (x >> 16) { x >>= 16; r += 16; }
866 if (x >> 8) { x >>= 8; r += 8; }
867 if (x >> 4) { x >>= 4; r += 4; }
868 if (x >> 2) { x >>= 2; r += 2; }
869 if (x >> 1) { r += 1; }
870
871 return r;
872 }
873
874 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
875 ecb_function_ int ecb_ld64 (uint64_t x)
876 {
877 int r = 0;
878
879 if (x >> 32) { x >>= 32; r += 32; }
880
881 return r + ecb_ld32 (x);
882 }
883#endif
884
885ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
886ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
887ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
888ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
889
890ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
891ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
892{
893 return ( (x * 0x0802U & 0x22110U)
894 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
895}
896
897ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
898ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
899{
900 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
901 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
902 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
903 x = ( x >> 8 ) | ( x << 8);
904
905 return x;
906}
907
908ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
909ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
910{
911 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
912 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
913 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
914 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
915 x = ( x >> 16 ) | ( x << 16);
916
917 return x;
918}
919
920/* popcount64 is only available on 64 bit cpus as gcc builtin */
921/* so for this version we are lazy */
922ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
923ecb_function_ int
924ecb_popcount64 (uint64_t x)
925{
926 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
927}
928
929ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
930ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
931ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
932ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
933ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
934ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
935ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
936ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
937
938ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
939ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
940ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
941ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
942ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
943ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
944ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
945ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
946
947#if ECB_GCC_VERSION(4,3)
948 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
949 #define ecb_bswap32(x) __builtin_bswap32 (x)
950 #define ecb_bswap64(x) __builtin_bswap64 (x)
951#else
952 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
953 ecb_function_ uint16_t
954 ecb_bswap16 (uint16_t x)
955 {
956 return ecb_rotl16 (x, 8);
957 }
958
959 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
960 ecb_function_ uint32_t
961 ecb_bswap32 (uint32_t x)
962 {
963 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
964 }
965
966 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
967 ecb_function_ uint64_t
968 ecb_bswap64 (uint64_t x)
969 {
970 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
971 }
972#endif
973
974#if ECB_GCC_VERSION(4,5)
975 #define ecb_unreachable() __builtin_unreachable ()
976#else
977 /* this seems to work fine, but gcc always emits a warning for it :/ */
978 ecb_inline void ecb_unreachable (void) ecb_noreturn;
979 ecb_inline void ecb_unreachable (void) { }
980#endif
981
982/* try to tell the compiler that some condition is definitely true */
983#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
984
985ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
986ecb_inline unsigned char
987ecb_byteorder_helper (void)
988{
989 /* the union code still generates code under pressure in gcc, */
990 /* but less than using pointers, and always seems to */
991 /* successfully return a constant. */
992 /* the reason why we have this horrible preprocessor mess */
993 /* is to avoid it in all cases, at least on common architectures */
994 /* or when using a recent enough gcc version (>= 4.6) */
995#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
996 return 0x44;
997#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
998 return 0x44;
999#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
1000 return 0x11;
1001#else
1002 union
1003 {
1004 uint32_t i;
1005 uint8_t c;
1006 } u = { 0x11223344 };
1007 return u.c;
1008#endif
1009}
1010
1011ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
1012ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
1013ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
1014ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
1015
1016#if ECB_GCC_VERSION(3,0) || ECB_C99
1017 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1018#else
1019 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1020#endif
1021
1022#if __cplusplus
1023 template<typename T>
1024 static inline T ecb_div_rd (T val, T div)
1025 {
1026 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1027 }
1028 template<typename T>
1029 static inline T ecb_div_ru (T val, T div)
1030 {
1031 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1032 }
1033#else
1034 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1035 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1036#endif
1037
1038#if ecb_cplusplus_does_not_suck
1039 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1040 template<typename T, int N>
1041 static inline int ecb_array_length (const T (&arr)[N])
1042 {
1043 return N;
1044 }
1045#else
1046 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1047#endif
1048
1049/*******************************************************************************/
1050/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1051
1052/* basically, everything uses "ieee pure-endian" floating point numbers */
1053/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1054#if 0 \
1055 || __i386 || __i386__ \
1056 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1057 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1058 || defined __arm__ && defined __ARM_EABI__ \
1059 || defined __s390__ || defined __s390x__ \
1060 || defined __mips__ \
1061 || defined __alpha__ \
1062 || defined __hppa__ \
1063 || defined __ia64__ \
1064 || defined __m68k__ \
1065 || defined __m88k__ \
1066 || defined __sh__ \
1067 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64
1068 #define ECB_STDFP 1
1069 #include <string.h> /* for memcpy */
1070#else
1071 #define ECB_STDFP 0
1072 #include <math.h> /* for frexp*, ldexp* */
1073#endif
1074
1075#ifndef ECB_NO_LIBM
1076
1077 /* convert a float to ieee single/binary32 */
1078 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1079 ecb_function_ uint32_t
1080 ecb_float_to_binary32 (float x)
1081 {
1082 uint32_t r;
1083
1084 #if ECB_STDFP
1085 memcpy (&r, &x, 4);
1086 #else
1087 /* slow emulation, works for anything but -0 */
1088 uint32_t m;
1089 int e;
1090
1091 if (x == 0e0f ) return 0x00000000U;
1092 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1093 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1094 if (x != x ) return 0x7fbfffffU;
1095
1096 m = frexpf (x, &e) * 0x1000000U;
1097
1098 r = m & 0x80000000U;
1099
1100 if (r)
1101 m = -m;
1102
1103 if (e <= -126)
1104 {
1105 m &= 0xffffffU;
1106 m >>= (-125 - e);
1107 e = -126;
1108 }
1109
1110 r |= (e + 126) << 23;
1111 r |= m & 0x7fffffU;
1112 #endif
1113
1114 return r;
1115 }
1116
1117 /* converts an ieee single/binary32 to a float */
1118 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1119 ecb_function_ float
1120 ecb_binary32_to_float (uint32_t x)
1121 {
1122 float r;
1123
1124 #if ECB_STDFP
1125 memcpy (&r, &x, 4);
1126 #else
1127 /* emulation, only works for normals and subnormals and +0 */
1128 int neg = x >> 31;
1129 int e = (x >> 23) & 0xffU;
1130
1131 x &= 0x7fffffU;
1132
1133 if (e)
1134 x |= 0x800000U;
1135 else
1136 e = 1;
1137
1138 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1139 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1140
1141 r = neg ? -r : r;
1142 #endif
1143
1144 return r;
1145 }
1146
1147 /* convert a double to ieee double/binary64 */
1148 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1149 ecb_function_ uint64_t
1150 ecb_double_to_binary64 (double x)
1151 {
1152 uint64_t r;
1153
1154 #if ECB_STDFP
1155 memcpy (&r, &x, 8);
1156 #else
1157 /* slow emulation, works for anything but -0 */
1158 uint64_t m;
1159 int e;
1160
1161 if (x == 0e0 ) return 0x0000000000000000U;
1162 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1163 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1164 if (x != x ) return 0X7ff7ffffffffffffU;
1165
1166 m = frexp (x, &e) * 0x20000000000000U;
1167
1168 r = m & 0x8000000000000000;;
1169
1170 if (r)
1171 m = -m;
1172
1173 if (e <= -1022)
1174 {
1175 m &= 0x1fffffffffffffU;
1176 m >>= (-1021 - e);
1177 e = -1022;
1178 }
1179
1180 r |= ((uint64_t)(e + 1022)) << 52;
1181 r |= m & 0xfffffffffffffU;
1182 #endif
1183
1184 return r;
1185 }
1186
1187 /* converts an ieee double/binary64 to a double */
1188 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1189 ecb_function_ double
1190 ecb_binary64_to_double (uint64_t x)
1191 {
1192 double r;
1193
1194 #if ECB_STDFP
1195 memcpy (&r, &x, 8);
1196 #else
1197 /* emulation, only works for normals and subnormals and +0 */
1198 int neg = x >> 63;
1199 int e = (x >> 52) & 0x7ffU;
1200
1201 x &= 0xfffffffffffffU;
1202
1203 if (e)
1204 x |= 0x10000000000000U;
1205 else
1206 e = 1;
1207
1208 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1209 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1210
1211 r = neg ? -r : r;
1212 #endif
1213
1214 return r;
1215 }
1216
1217#endif
1218
1219#endif
1220
1221/* ECB.H END */
1222
1223#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1224/* if your architecture doesn't need memory fences, e.g. because it is
1225 * single-cpu/core, or if you use libev in a project that doesn't use libev
1226 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1227 * libev, in which cases the memory fences become nops.
1228 * alternatively, you can remove this #error and link against libpthread,
1229 * which will then provide the memory fences.
1230 */
1231# error "memory fences not defined for your architecture, please report"
1232#endif
1233
1234#ifndef ECB_MEMORY_FENCE
1235# define ECB_MEMORY_FENCE do { } while (0)
1236# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1237# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1238#endif
1239
1240#define expect_false(cond) ecb_expect_false (cond)
1241#define expect_true(cond) ecb_expect_true (cond)
1242#define noinline ecb_noinline
1243
480#define inline_size static inline 1244#define inline_size ecb_inline
481 1245
482#if EV_FEATURE_CODE 1246#if EV_FEATURE_CODE
483# define inline_speed static inline 1247# define inline_speed ecb_inline
484#else 1248#else
485# define inline_speed static noinline 1249# define inline_speed static noinline
486#endif 1250#endif
487 1251
488#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1252#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
… …
503#define ev_active(w) ((W)(w))->active 1267#define ev_active(w) ((W)(w))->active
504#define ev_at(w) ((WT)(w))->at 1268#define ev_at(w) ((WT)(w))->at
505 1269
506#if EV_USE_REALTIME 1270#if EV_USE_REALTIME
507/* sig_atomic_t is used to avoid per-thread variables or locking but still */ 1271/* sig_atomic_t is used to avoid per-thread variables or locking but still */
508/* giving it a reasonably high chance of working on typical architetcures */ 1272/* giving it a reasonably high chance of working on typical architectures */
509static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */ 1273static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
510#endif 1274#endif
511 1275
512#if EV_USE_MONOTONIC 1276#if EV_USE_MONOTONIC
513static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 1277static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
… …
527# include "ev_win32.c" 1291# include "ev_win32.c"
528#endif 1292#endif
529 1293
530/*****************************************************************************/ 1294/*****************************************************************************/
531 1295
1296/* define a suitable floor function (only used by periodics atm) */
1297
1298#if EV_USE_FLOOR
1299# include <math.h>
1300# define ev_floor(v) floor (v)
1301#else
1302
1303#include <float.h>
1304
1305/* a floor() replacement function, should be independent of ev_tstamp type */
1306static ev_tstamp noinline
1307ev_floor (ev_tstamp v)
1308{
1309 /* the choice of shift factor is not terribly important */
1310#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1311 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1312#else
1313 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1314#endif
1315
1316 /* argument too large for an unsigned long? */
1317 if (expect_false (v >= shift))
1318 {
1319 ev_tstamp f;
1320
1321 if (v == v - 1.)
1322 return v; /* very large number */
1323
1324 f = shift * ev_floor (v * (1. / shift));
1325 return f + ev_floor (v - f);
1326 }
1327
1328 /* special treatment for negative args? */
1329 if (expect_false (v < 0.))
1330 {
1331 ev_tstamp f = -ev_floor (-v);
1332
1333 return f - (f == v ? 0 : 1);
1334 }
1335
1336 /* fits into an unsigned long */
1337 return (unsigned long)v;
1338}
1339
1340#endif
1341
1342/*****************************************************************************/
1343
1344#ifdef __linux
1345# include <sys/utsname.h>
1346#endif
1347
1348static unsigned int noinline ecb_cold
1349ev_linux_version (void)
1350{
1351#ifdef __linux
1352 unsigned int v = 0;
1353 struct utsname buf;
1354 int i;
1355 char *p = buf.release;
1356
1357 if (uname (&buf))
1358 return 0;
1359
1360 for (i = 3+1; --i; )
1361 {
1362 unsigned int c = 0;
1363
1364 for (;;)
1365 {
1366 if (*p >= '0' && *p <= '9')
1367 c = c * 10 + *p++ - '0';
1368 else
1369 {
1370 p += *p == '.';
1371 break;
1372 }
1373 }
1374
1375 v = (v << 8) | c;
1376 }
1377
1378 return v;
1379#else
1380 return 0;
1381#endif
1382}
1383
1384/*****************************************************************************/
1385
532#if EV_AVOID_STDIO 1386#if EV_AVOID_STDIO
533static void noinline 1387static void noinline ecb_cold
534ev_printerr (const char *msg) 1388ev_printerr (const char *msg)
535{ 1389{
536 write (STDERR_FILENO, msg, strlen (msg)); 1390 write (STDERR_FILENO, msg, strlen (msg));
537} 1391}
538#endif 1392#endif
539 1393
540static void (*syserr_cb)(const char *msg); 1394static void (*syserr_cb)(const char *msg) EV_THROW;
541 1395
542void 1396void ecb_cold
543ev_set_syserr_cb (void (*cb)(const char *msg)) 1397ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
544{ 1398{
545 syserr_cb = cb; 1399 syserr_cb = cb;
546} 1400}
547 1401
548static void noinline 1402static void noinline ecb_cold
549ev_syserr (const char *msg) 1403ev_syserr (const char *msg)
550{ 1404{
551 if (!msg) 1405 if (!msg)
552 msg = "(libev) system error"; 1406 msg = "(libev) system error";
553 1407
554 if (syserr_cb) 1408 if (syserr_cb)
555 syserr_cb (msg); 1409 syserr_cb (msg);
556 else 1410 else
557 { 1411 {
558#if EV_AVOID_STDIO 1412#if EV_AVOID_STDIO
559 const char *err = strerror (errno);
560
561 ev_printerr (msg); 1413 ev_printerr (msg);
562 ev_printerr (": "); 1414 ev_printerr (": ");
563 ev_printerr (err); 1415 ev_printerr (strerror (errno));
564 ev_printerr ("\n"); 1416 ev_printerr ("\n");
565#else 1417#else
566 perror (msg); 1418 perror (msg);
567#endif 1419#endif
568 abort (); 1420 abort ();
569 } 1421 }
570} 1422}
571 1423
572static void * 1424static void *
573ev_realloc_emul (void *ptr, long size) 1425ev_realloc_emul (void *ptr, long size) EV_THROW
574{ 1426{
575#if __GLIBC__
576 return realloc (ptr, size);
577#else
578 /* some systems, notably openbsd and darwin, fail to properly 1427 /* some systems, notably openbsd and darwin, fail to properly
579 * implement realloc (x, 0) (as required by both ansi c-89 and 1428 * implement realloc (x, 0) (as required by both ansi c-89 and
580 * the single unix specification, so work around them here. 1429 * the single unix specification, so work around them here.
1430 * recently, also (at least) fedora and debian started breaking it,
1431 * despite documenting it otherwise.
581 */ 1432 */
582 1433
583 if (size) 1434 if (size)
584 return realloc (ptr, size); 1435 return realloc (ptr, size);
585 1436
586 free (ptr); 1437 free (ptr);
587 return 0; 1438 return 0;
588#endif
589} 1439}
590 1440
591static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1441static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
592 1442
593void 1443void ecb_cold
594ev_set_allocator (void *(*cb)(void *ptr, long size)) 1444ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
595{ 1445{
596 alloc = cb; 1446 alloc = cb;
597} 1447}
598 1448
599inline_speed void * 1449inline_speed void *
… …
602 ptr = alloc (ptr, size); 1452 ptr = alloc (ptr, size);
603 1453
604 if (!ptr && size) 1454 if (!ptr && size)
605 { 1455 {
606#if EV_AVOID_STDIO 1456#if EV_AVOID_STDIO
607 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1457 ev_printerr ("(libev) memory allocation failed, aborting.\n");
608#else 1458#else
609 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1459 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
610#endif 1460#endif
611 abort (); 1461 abort ();
612 } 1462 }
613 1463
614 return ptr; 1464 return ptr;
… …
631 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1481 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
632 unsigned char unused; 1482 unsigned char unused;
633#if EV_USE_EPOLL 1483#if EV_USE_EPOLL
634 unsigned int egen; /* generation counter to counter epoll bugs */ 1484 unsigned int egen; /* generation counter to counter epoll bugs */
635#endif 1485#endif
636#if EV_SELECT_IS_WINSOCKET 1486#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
637 SOCKET handle; 1487 SOCKET handle;
1488#endif
1489#if EV_USE_IOCP
1490 OVERLAPPED or, ow;
638#endif 1491#endif
639} ANFD; 1492} ANFD;
640 1493
641/* stores the pending event set for a given watcher */ 1494/* stores the pending event set for a given watcher */
642typedef struct 1495typedef struct
… …
684 #undef VAR 1537 #undef VAR
685 }; 1538 };
686 #include "ev_wrap.h" 1539 #include "ev_wrap.h"
687 1540
688 static struct ev_loop default_loop_struct; 1541 static struct ev_loop default_loop_struct;
689 struct ev_loop *ev_default_loop_ptr; 1542 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
690 1543
691#else 1544#else
692 1545
693 ev_tstamp ev_rt_now; 1546 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
694 #define VAR(name,decl) static decl; 1547 #define VAR(name,decl) static decl;
695 #include "ev_vars.h" 1548 #include "ev_vars.h"
696 #undef VAR 1549 #undef VAR
697 1550
698 static int ev_default_loop_ptr; 1551 static int ev_default_loop_ptr;
… …
707# define EV_RELEASE_CB (void)0 1560# define EV_RELEASE_CB (void)0
708# define EV_ACQUIRE_CB (void)0 1561# define EV_ACQUIRE_CB (void)0
709# define EV_INVOKE_PENDING ev_invoke_pending (EV_A) 1562# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
710#endif 1563#endif
711 1564
712#define EVUNLOOP_RECURSE 0x80 1565#define EVBREAK_RECURSE 0x80
713 1566
714/*****************************************************************************/ 1567/*****************************************************************************/
715 1568
716#ifndef EV_HAVE_EV_TIME 1569#ifndef EV_HAVE_EV_TIME
717ev_tstamp 1570ev_tstamp
718ev_time (void) 1571ev_time (void) EV_THROW
719{ 1572{
720#if EV_USE_REALTIME 1573#if EV_USE_REALTIME
721 if (expect_true (have_realtime)) 1574 if (expect_true (have_realtime))
722 { 1575 {
723 struct timespec ts; 1576 struct timespec ts;
… …
747 return ev_time (); 1600 return ev_time ();
748} 1601}
749 1602
750#if EV_MULTIPLICITY 1603#if EV_MULTIPLICITY
751ev_tstamp 1604ev_tstamp
752ev_now (EV_P) 1605ev_now (EV_P) EV_THROW
753{ 1606{
754 return ev_rt_now; 1607 return ev_rt_now;
755} 1608}
756#endif 1609#endif
757 1610
758void 1611void
759ev_sleep (ev_tstamp delay) 1612ev_sleep (ev_tstamp delay) EV_THROW
760{ 1613{
761 if (delay > 0.) 1614 if (delay > 0.)
762 { 1615 {
763#if EV_USE_NANOSLEEP 1616#if EV_USE_NANOSLEEP
764 struct timespec ts; 1617 struct timespec ts;
765 1618
766 ts.tv_sec = (time_t)delay; 1619 EV_TS_SET (ts, delay);
767 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
768
769 nanosleep (&ts, 0); 1620 nanosleep (&ts, 0);
770#elif defined(_WIN32) 1621#elif defined _WIN32
771 Sleep ((unsigned long)(delay * 1e3)); 1622 Sleep ((unsigned long)(delay * 1e3));
772#else 1623#else
773 struct timeval tv; 1624 struct timeval tv;
774 1625
775 tv.tv_sec = (time_t)delay;
776 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
777
778 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1626 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
779 /* something not guaranteed by newer posix versions, but guaranteed */ 1627 /* something not guaranteed by newer posix versions, but guaranteed */
780 /* by older ones */ 1628 /* by older ones */
1629 EV_TV_SET (tv, delay);
781 select (0, 0, 0, 0, &tv); 1630 select (0, 0, 0, 0, &tv);
782#endif 1631#endif
783 } 1632 }
784} 1633}
785 1634
786/*****************************************************************************/ 1635/*****************************************************************************/
787 1636
788#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1637#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
789 1638
790/* find a suitable new size for the given array, */ 1639/* find a suitable new size for the given array, */
791/* hopefully by rounding to a ncie-to-malloc size */ 1640/* hopefully by rounding to a nice-to-malloc size */
792inline_size int 1641inline_size int
793array_nextsize (int elem, int cur, int cnt) 1642array_nextsize (int elem, int cur, int cnt)
794{ 1643{
795 int ncur = cur + 1; 1644 int ncur = cur + 1;
796 1645
797 do 1646 do
798 ncur <<= 1; 1647 ncur <<= 1;
799 while (cnt > ncur); 1648 while (cnt > ncur);
800 1649
801 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1650 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
802 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1651 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
803 { 1652 {
804 ncur *= elem; 1653 ncur *= elem;
805 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1654 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
806 ncur = ncur - sizeof (void *) * 4; 1655 ncur = ncur - sizeof (void *) * 4;
… …
808 } 1657 }
809 1658
810 return ncur; 1659 return ncur;
811} 1660}
812 1661
813static noinline void * 1662static void * noinline ecb_cold
814array_realloc (int elem, void *base, int *cur, int cnt) 1663array_realloc (int elem, void *base, int *cur, int cnt)
815{ 1664{
816 *cur = array_nextsize (elem, *cur, cnt); 1665 *cur = array_nextsize (elem, *cur, cnt);
817 return ev_realloc (base, elem * *cur); 1666 return ev_realloc (base, elem * *cur);
818} 1667}
… …
821 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1670 memset ((void *)(base), 0, sizeof (*(base)) * (count))
822 1671
823#define array_needsize(type,base,cur,cnt,init) \ 1672#define array_needsize(type,base,cur,cnt,init) \
824 if (expect_false ((cnt) > (cur))) \ 1673 if (expect_false ((cnt) > (cur))) \
825 { \ 1674 { \
826 int ocur_ = (cur); \ 1675 int ecb_unused ocur_ = (cur); \
827 (base) = (type *)array_realloc \ 1676 (base) = (type *)array_realloc \
828 (sizeof (type), (base), &(cur), (cnt)); \ 1677 (sizeof (type), (base), &(cur), (cnt)); \
829 init ((base) + (ocur_), (cur) - ocur_); \ 1678 init ((base) + (ocur_), (cur) - ocur_); \
830 } 1679 }
831 1680
… …
849pendingcb (EV_P_ ev_prepare *w, int revents) 1698pendingcb (EV_P_ ev_prepare *w, int revents)
850{ 1699{
851} 1700}
852 1701
853void noinline 1702void noinline
854ev_feed_event (EV_P_ void *w, int revents) 1703ev_feed_event (EV_P_ void *w, int revents) EV_THROW
855{ 1704{
856 W w_ = (W)w; 1705 W w_ = (W)w;
857 int pri = ABSPRI (w_); 1706 int pri = ABSPRI (w_);
858 1707
859 if (expect_false (w_->pending)) 1708 if (expect_false (w_->pending))
… …
863 w_->pending = ++pendingcnt [pri]; 1712 w_->pending = ++pendingcnt [pri];
864 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1713 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
865 pendings [pri][w_->pending - 1].w = w_; 1714 pendings [pri][w_->pending - 1].w = w_;
866 pendings [pri][w_->pending - 1].events = revents; 1715 pendings [pri][w_->pending - 1].events = revents;
867 } 1716 }
1717
1718 pendingpri = NUMPRI - 1;
868} 1719}
869 1720
870inline_speed void 1721inline_speed void
871feed_reverse (EV_P_ W w) 1722feed_reverse (EV_P_ W w)
872{ 1723{
… …
918 if (expect_true (!anfd->reify)) 1769 if (expect_true (!anfd->reify))
919 fd_event_nocheck (EV_A_ fd, revents); 1770 fd_event_nocheck (EV_A_ fd, revents);
920} 1771}
921 1772
922void 1773void
923ev_feed_fd_event (EV_P_ int fd, int revents) 1774ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
924{ 1775{
925 if (fd >= 0 && fd < anfdmax) 1776 if (fd >= 0 && fd < anfdmax)
926 fd_event_nocheck (EV_A_ fd, revents); 1777 fd_event_nocheck (EV_A_ fd, revents);
927} 1778}
928 1779
… …
931inline_size void 1782inline_size void
932fd_reify (EV_P) 1783fd_reify (EV_P)
933{ 1784{
934 int i; 1785 int i;
935 1786
1787#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1788 for (i = 0; i < fdchangecnt; ++i)
1789 {
1790 int fd = fdchanges [i];
1791 ANFD *anfd = anfds + fd;
1792
1793 if (anfd->reify & EV__IOFDSET && anfd->head)
1794 {
1795 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1796
1797 if (handle != anfd->handle)
1798 {
1799 unsigned long arg;
1800
1801 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1802
1803 /* handle changed, but fd didn't - we need to do it in two steps */
1804 backend_modify (EV_A_ fd, anfd->events, 0);
1805 anfd->events = 0;
1806 anfd->handle = handle;
1807 }
1808 }
1809 }
1810#endif
1811
936 for (i = 0; i < fdchangecnt; ++i) 1812 for (i = 0; i < fdchangecnt; ++i)
937 { 1813 {
938 int fd = fdchanges [i]; 1814 int fd = fdchanges [i];
939 ANFD *anfd = anfds + fd; 1815 ANFD *anfd = anfds + fd;
940 ev_io *w; 1816 ev_io *w;
941 1817
942 unsigned char events = 0; 1818 unsigned char o_events = anfd->events;
1819 unsigned char o_reify = anfd->reify;
943 1820
944 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1821 anfd->reify = 0;
945 events |= (unsigned char)w->events;
946 1822
947#if EV_SELECT_IS_WINSOCKET 1823 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
948 if (events)
949 { 1824 {
950 unsigned long arg; 1825 anfd->events = 0;
951 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1826
952 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 1827 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1828 anfd->events |= (unsigned char)w->events;
1829
1830 if (o_events != anfd->events)
1831 o_reify = EV__IOFDSET; /* actually |= */
953 } 1832 }
954#endif
955 1833
956 { 1834 if (o_reify & EV__IOFDSET)
957 unsigned char o_events = anfd->events;
958 unsigned char o_reify = anfd->reify;
959
960 anfd->reify = 0;
961 anfd->events = events;
962
963 if (o_events != events || o_reify & EV__IOFDSET)
964 backend_modify (EV_A_ fd, o_events, events); 1835 backend_modify (EV_A_ fd, o_events, anfd->events);
965 }
966 } 1836 }
967 1837
968 fdchangecnt = 0; 1838 fdchangecnt = 0;
969} 1839}
970 1840
… …
982 fdchanges [fdchangecnt - 1] = fd; 1852 fdchanges [fdchangecnt - 1] = fd;
983 } 1853 }
984} 1854}
985 1855
986/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 1856/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
987inline_speed void 1857inline_speed void ecb_cold
988fd_kill (EV_P_ int fd) 1858fd_kill (EV_P_ int fd)
989{ 1859{
990 ev_io *w; 1860 ev_io *w;
991 1861
992 while ((w = (ev_io *)anfds [fd].head)) 1862 while ((w = (ev_io *)anfds [fd].head))
… …
995 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1865 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
996 } 1866 }
997} 1867}
998 1868
999/* check whether the given fd is actually valid, for error recovery */ 1869/* check whether the given fd is actually valid, for error recovery */
1000inline_size int 1870inline_size int ecb_cold
1001fd_valid (int fd) 1871fd_valid (int fd)
1002{ 1872{
1003#ifdef _WIN32 1873#ifdef _WIN32
1004 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 1874 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1005#else 1875#else
1006 return fcntl (fd, F_GETFD) != -1; 1876 return fcntl (fd, F_GETFD) != -1;
1007#endif 1877#endif
1008} 1878}
1009 1879
1010/* called on EBADF to verify fds */ 1880/* called on EBADF to verify fds */
1011static void noinline 1881static void noinline ecb_cold
1012fd_ebadf (EV_P) 1882fd_ebadf (EV_P)
1013{ 1883{
1014 int fd; 1884 int fd;
1015 1885
1016 for (fd = 0; fd < anfdmax; ++fd) 1886 for (fd = 0; fd < anfdmax; ++fd)
… …
1018 if (!fd_valid (fd) && errno == EBADF) 1888 if (!fd_valid (fd) && errno == EBADF)
1019 fd_kill (EV_A_ fd); 1889 fd_kill (EV_A_ fd);
1020} 1890}
1021 1891
1022/* called on ENOMEM in select/poll to kill some fds and retry */ 1892/* called on ENOMEM in select/poll to kill some fds and retry */
1023static void noinline 1893static void noinline ecb_cold
1024fd_enomem (EV_P) 1894fd_enomem (EV_P)
1025{ 1895{
1026 int fd; 1896 int fd;
1027 1897
1028 for (fd = anfdmax; fd--; ) 1898 for (fd = anfdmax; fd--; )
… …
1063} 1933}
1064 1934
1065/*****************************************************************************/ 1935/*****************************************************************************/
1066 1936
1067/* 1937/*
1068 * the heap functions want a real array index. array index 0 uis guaranteed to not 1938 * the heap functions want a real array index. array index 0 is guaranteed to not
1069 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives 1939 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1070 * the branching factor of the d-tree. 1940 * the branching factor of the d-tree.
1071 */ 1941 */
1072 1942
1073/* 1943/*
… …
1223 2093
1224/*****************************************************************************/ 2094/*****************************************************************************/
1225 2095
1226#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2096#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1227 2097
1228static void noinline 2098static void noinline ecb_cold
1229evpipe_init (EV_P) 2099evpipe_init (EV_P)
1230{ 2100{
1231 if (!ev_is_active (&pipe_w)) 2101 if (!ev_is_active (&pipe_w))
1232 { 2102 {
2103 int fds [2];
2104
1233# if EV_USE_EVENTFD 2105# if EV_USE_EVENTFD
2106 fds [0] = -1;
1234 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2107 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1235 if (evfd < 0 && errno == EINVAL) 2108 if (fds [1] < 0 && errno == EINVAL)
1236 evfd = eventfd (0, 0); 2109 fds [1] = eventfd (0, 0);
1237 2110
1238 if (evfd >= 0) 2111 if (fds [1] < 0)
2112# endif
1239 { 2113 {
2114 while (pipe (fds))
2115 ev_syserr ("(libev) error creating signal/async pipe");
2116
2117 fd_intern (fds [0]);
2118 }
2119
1240 evpipe [0] = -1; 2120 evpipe [0] = fds [0];
1241 fd_intern (evfd); /* doing it twice doesn't hurt */ 2121
1242 ev_io_set (&pipe_w, evfd, EV_READ); 2122 if (evpipe [1] < 0)
2123 evpipe [1] = fds [1]; /* first call, set write fd */
2124 else
2125 {
2126 /* on subsequent calls, do not change evpipe [1] */
2127 /* so that evpipe_write can always rely on its value. */
2128 /* this branch does not do anything sensible on windows, */
2129 /* so must not be executed on windows */
2130
2131 dup2 (fds [1], evpipe [1]);
2132 close (fds [1]);
2133 }
2134
2135 fd_intern (evpipe [1]);
2136
2137 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2138 ev_io_start (EV_A_ &pipe_w);
2139 ev_unref (EV_A); /* watcher should not keep loop alive */
2140 }
2141}
2142
2143inline_speed void
2144evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2145{
2146 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2147
2148 if (expect_true (*flag))
2149 return;
2150
2151 *flag = 1;
2152 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2153
2154 pipe_write_skipped = 1;
2155
2156 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2157
2158 if (pipe_write_wanted)
2159 {
2160 int old_errno;
2161
2162 pipe_write_skipped = 0;
2163 ECB_MEMORY_FENCE_RELEASE;
2164
2165 old_errno = errno; /* save errno because write will clobber it */
2166
2167#if EV_USE_EVENTFD
2168 if (evpipe [0] < 0)
2169 {
2170 uint64_t counter = 1;
2171 write (evpipe [1], &counter, sizeof (uint64_t));
1243 } 2172 }
1244 else 2173 else
1245# endif 2174#endif
1246 { 2175 {
1247 while (pipe (evpipe)) 2176#ifdef _WIN32
1248 ev_syserr ("(libev) error creating signal/async pipe"); 2177 WSABUF buf;
1249 2178 DWORD sent;
1250 fd_intern (evpipe [0]); 2179 buf.buf = &buf;
1251 fd_intern (evpipe [1]); 2180 buf.len = 1;
1252 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2181 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2182#else
2183 write (evpipe [1], &(evpipe [1]), 1);
2184#endif
1253 } 2185 }
1254
1255 ev_io_start (EV_A_ &pipe_w);
1256 ev_unref (EV_A); /* watcher should not keep loop alive */
1257 }
1258}
1259
1260inline_size void
1261evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1262{
1263 if (!*flag)
1264 {
1265 int old_errno = errno; /* save errno because write might clobber it */
1266 char dummy;
1267
1268 *flag = 1;
1269
1270#if EV_USE_EVENTFD
1271 if (evfd >= 0)
1272 {
1273 uint64_t counter = 1;
1274 write (evfd, &counter, sizeof (uint64_t));
1275 }
1276 else
1277#endif
1278 write (evpipe [1], &dummy, 1);
1279 2186
1280 errno = old_errno; 2187 errno = old_errno;
1281 } 2188 }
1282} 2189}
1283 2190
… …
1286static void 2193static void
1287pipecb (EV_P_ ev_io *iow, int revents) 2194pipecb (EV_P_ ev_io *iow, int revents)
1288{ 2195{
1289 int i; 2196 int i;
1290 2197
2198 if (revents & EV_READ)
2199 {
1291#if EV_USE_EVENTFD 2200#if EV_USE_EVENTFD
1292 if (evfd >= 0) 2201 if (evpipe [0] < 0)
1293 { 2202 {
1294 uint64_t counter; 2203 uint64_t counter;
1295 read (evfd, &counter, sizeof (uint64_t)); 2204 read (evpipe [1], &counter, sizeof (uint64_t));
1296 } 2205 }
1297 else 2206 else
1298#endif 2207#endif
1299 { 2208 {
1300 char dummy; 2209 char dummy[4];
2210#ifdef _WIN32
2211 WSABUF buf;
2212 DWORD recvd;
2213 DWORD flags = 0;
2214 buf.buf = dummy;
2215 buf.len = sizeof (dummy);
2216 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2217#else
1301 read (evpipe [0], &dummy, 1); 2218 read (evpipe [0], &dummy, sizeof (dummy));
2219#endif
2220 }
1302 } 2221 }
1303 2222
2223 pipe_write_skipped = 0;
2224
2225 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2226
2227#if EV_SIGNAL_ENABLE
1304 if (sig_pending) 2228 if (sig_pending)
1305 { 2229 {
1306 sig_pending = 0; 2230 sig_pending = 0;
2231
2232 ECB_MEMORY_FENCE;
1307 2233
1308 for (i = EV_NSIG - 1; i--; ) 2234 for (i = EV_NSIG - 1; i--; )
1309 if (expect_false (signals [i].pending)) 2235 if (expect_false (signals [i].pending))
1310 ev_feed_signal_event (EV_A_ i + 1); 2236 ev_feed_signal_event (EV_A_ i + 1);
1311 } 2237 }
2238#endif
1312 2239
1313#if EV_ASYNC_ENABLE 2240#if EV_ASYNC_ENABLE
1314 if (async_pending) 2241 if (async_pending)
1315 { 2242 {
1316 async_pending = 0; 2243 async_pending = 0;
2244
2245 ECB_MEMORY_FENCE;
1317 2246
1318 for (i = asynccnt; i--; ) 2247 for (i = asynccnt; i--; )
1319 if (asyncs [i]->sent) 2248 if (asyncs [i]->sent)
1320 { 2249 {
1321 asyncs [i]->sent = 0; 2250 asyncs [i]->sent = 0;
2251 ECB_MEMORY_FENCE_RELEASE;
1322 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2252 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1323 } 2253 }
1324 } 2254 }
1325#endif 2255#endif
1326} 2256}
1327 2257
1328/*****************************************************************************/ 2258/*****************************************************************************/
1329 2259
2260void
2261ev_feed_signal (int signum) EV_THROW
2262{
2263#if EV_MULTIPLICITY
2264 EV_P;
2265 ECB_MEMORY_FENCE_ACQUIRE;
2266 EV_A = signals [signum - 1].loop;
2267
2268 if (!EV_A)
2269 return;
2270#endif
2271
2272 signals [signum - 1].pending = 1;
2273 evpipe_write (EV_A_ &sig_pending);
2274}
2275
1330static void 2276static void
1331ev_sighandler (int signum) 2277ev_sighandler (int signum)
1332{ 2278{
1333#if EV_MULTIPLICITY
1334 EV_P = signals [signum - 1].loop;
1335#endif
1336
1337#ifdef _WIN32 2279#ifdef _WIN32
1338 signal (signum, ev_sighandler); 2280 signal (signum, ev_sighandler);
1339#endif 2281#endif
1340 2282
1341 signals [signum - 1].pending = 1; 2283 ev_feed_signal (signum);
1342 evpipe_write (EV_A_ &sig_pending);
1343} 2284}
1344 2285
1345void noinline 2286void noinline
1346ev_feed_signal_event (EV_P_ int signum) 2287ev_feed_signal_event (EV_P_ int signum) EV_THROW
1347{ 2288{
1348 WL w; 2289 WL w;
1349 2290
1350 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2291 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1351 return; 2292 return;
1352 2293
1353 --signum; 2294 --signum;
1354 2295
1355#if EV_MULTIPLICITY 2296#if EV_MULTIPLICITY
… …
1359 if (expect_false (signals [signum].loop != EV_A)) 2300 if (expect_false (signals [signum].loop != EV_A))
1360 return; 2301 return;
1361#endif 2302#endif
1362 2303
1363 signals [signum].pending = 0; 2304 signals [signum].pending = 0;
2305 ECB_MEMORY_FENCE_RELEASE;
1364 2306
1365 for (w = signals [signum].head; w; w = w->next) 2307 for (w = signals [signum].head; w; w = w->next)
1366 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2308 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1367} 2309}
1368 2310
… …
1447 2389
1448#endif 2390#endif
1449 2391
1450/*****************************************************************************/ 2392/*****************************************************************************/
1451 2393
2394#if EV_USE_IOCP
2395# include "ev_iocp.c"
2396#endif
1452#if EV_USE_PORT 2397#if EV_USE_PORT
1453# include "ev_port.c" 2398# include "ev_port.c"
1454#endif 2399#endif
1455#if EV_USE_KQUEUE 2400#if EV_USE_KQUEUE
1456# include "ev_kqueue.c" 2401# include "ev_kqueue.c"
… …
1463#endif 2408#endif
1464#if EV_USE_SELECT 2409#if EV_USE_SELECT
1465# include "ev_select.c" 2410# include "ev_select.c"
1466#endif 2411#endif
1467 2412
1468int 2413int ecb_cold
1469ev_version_major (void) 2414ev_version_major (void) EV_THROW
1470{ 2415{
1471 return EV_VERSION_MAJOR; 2416 return EV_VERSION_MAJOR;
1472} 2417}
1473 2418
1474int 2419int ecb_cold
1475ev_version_minor (void) 2420ev_version_minor (void) EV_THROW
1476{ 2421{
1477 return EV_VERSION_MINOR; 2422 return EV_VERSION_MINOR;
1478} 2423}
1479 2424
1480/* return true if we are running with elevated privileges and should ignore env variables */ 2425/* return true if we are running with elevated privileges and should ignore env variables */
1481int inline_size 2426int inline_size ecb_cold
1482enable_secure (void) 2427enable_secure (void)
1483{ 2428{
1484#ifdef _WIN32 2429#ifdef _WIN32
1485 return 0; 2430 return 0;
1486#else 2431#else
1487 return getuid () != geteuid () 2432 return getuid () != geteuid ()
1488 || getgid () != getegid (); 2433 || getgid () != getegid ();
1489#endif 2434#endif
1490} 2435}
1491 2436
1492unsigned int 2437unsigned int ecb_cold
1493ev_supported_backends (void) 2438ev_supported_backends (void) EV_THROW
1494{ 2439{
1495 unsigned int flags = 0; 2440 unsigned int flags = 0;
1496 2441
1497 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2442 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1498 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2443 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1501 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2446 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1502 2447
1503 return flags; 2448 return flags;
1504} 2449}
1505 2450
1506unsigned int 2451unsigned int ecb_cold
1507ev_recommended_backends (void) 2452ev_recommended_backends (void) EV_THROW
1508{ 2453{
1509 unsigned int flags = ev_supported_backends (); 2454 unsigned int flags = ev_supported_backends ();
1510 2455
1511#ifndef __NetBSD__ 2456#ifndef __NetBSD__
1512 /* kqueue is borked on everything but netbsd apparently */ 2457 /* kqueue is borked on everything but netbsd apparently */
… …
1523#endif 2468#endif
1524 2469
1525 return flags; 2470 return flags;
1526} 2471}
1527 2472
2473unsigned int ecb_cold
2474ev_embeddable_backends (void) EV_THROW
2475{
2476 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2477
2478 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2479 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2480 flags &= ~EVBACKEND_EPOLL;
2481
2482 return flags;
2483}
2484
1528unsigned int 2485unsigned int
1529ev_embeddable_backends (void)
1530{
1531 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1532
1533 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1534 /* please fix it and tell me how to detect the fix */
1535 flags &= ~EVBACKEND_EPOLL;
1536
1537 return flags;
1538}
1539
1540unsigned int
1541ev_backend (EV_P) 2486ev_backend (EV_P) EV_THROW
1542{ 2487{
1543 return backend; 2488 return backend;
1544} 2489}
1545 2490
1546#if EV_FEATURE_API 2491#if EV_FEATURE_API
1547unsigned int 2492unsigned int
1548ev_iteration (EV_P) 2493ev_iteration (EV_P) EV_THROW
1549{ 2494{
1550 return loop_count; 2495 return loop_count;
1551} 2496}
1552 2497
1553unsigned int 2498unsigned int
1554ev_depth (EV_P) 2499ev_depth (EV_P) EV_THROW
1555{ 2500{
1556 return loop_depth; 2501 return loop_depth;
1557} 2502}
1558 2503
1559void 2504void
1560ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2505ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1561{ 2506{
1562 io_blocktime = interval; 2507 io_blocktime = interval;
1563} 2508}
1564 2509
1565void 2510void
1566ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2511ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1567{ 2512{
1568 timeout_blocktime = interval; 2513 timeout_blocktime = interval;
1569} 2514}
1570 2515
1571void 2516void
1572ev_set_userdata (EV_P_ void *data) 2517ev_set_userdata (EV_P_ void *data) EV_THROW
1573{ 2518{
1574 userdata = data; 2519 userdata = data;
1575} 2520}
1576 2521
1577void * 2522void *
1578ev_userdata (EV_P) 2523ev_userdata (EV_P) EV_THROW
1579{ 2524{
1580 return userdata; 2525 return userdata;
1581} 2526}
1582 2527
2528void
1583void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2529ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
1584{ 2530{
1585 invoke_cb = invoke_pending_cb; 2531 invoke_cb = invoke_pending_cb;
1586} 2532}
1587 2533
2534void
1588void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2535ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
1589{ 2536{
1590 release_cb = release; 2537 release_cb = release;
1591 acquire_cb = acquire; 2538 acquire_cb = acquire;
1592} 2539}
1593#endif 2540#endif
1594 2541
1595/* initialise a loop structure, must be zero-initialised */ 2542/* initialise a loop structure, must be zero-initialised */
1596static void noinline 2543static void noinline ecb_cold
1597loop_init (EV_P_ unsigned int flags) 2544loop_init (EV_P_ unsigned int flags) EV_THROW
1598{ 2545{
1599 if (!backend) 2546 if (!backend)
1600 { 2547 {
2548 origflags = flags;
2549
1601#if EV_USE_REALTIME 2550#if EV_USE_REALTIME
1602 if (!have_realtime) 2551 if (!have_realtime)
1603 { 2552 {
1604 struct timespec ts; 2553 struct timespec ts;
1605 2554
… …
1627 if (!(flags & EVFLAG_NOENV) 2576 if (!(flags & EVFLAG_NOENV)
1628 && !enable_secure () 2577 && !enable_secure ()
1629 && getenv ("LIBEV_FLAGS")) 2578 && getenv ("LIBEV_FLAGS"))
1630 flags = atoi (getenv ("LIBEV_FLAGS")); 2579 flags = atoi (getenv ("LIBEV_FLAGS"));
1631 2580
1632 ev_rt_now = ev_time (); 2581 ev_rt_now = ev_time ();
1633 mn_now = get_clock (); 2582 mn_now = get_clock ();
1634 now_floor = mn_now; 2583 now_floor = mn_now;
1635 rtmn_diff = ev_rt_now - mn_now; 2584 rtmn_diff = ev_rt_now - mn_now;
1636#if EV_FEATURE_API 2585#if EV_FEATURE_API
1637 invoke_cb = ev_invoke_pending; 2586 invoke_cb = ev_invoke_pending;
1638#endif 2587#endif
1639 2588
1640 io_blocktime = 0.; 2589 io_blocktime = 0.;
1641 timeout_blocktime = 0.; 2590 timeout_blocktime = 0.;
1642 backend = 0; 2591 backend = 0;
1643 backend_fd = -1; 2592 backend_fd = -1;
1644 sig_pending = 0; 2593 sig_pending = 0;
1645#if EV_ASYNC_ENABLE 2594#if EV_ASYNC_ENABLE
1646 async_pending = 0; 2595 async_pending = 0;
1647#endif 2596#endif
2597 pipe_write_skipped = 0;
2598 pipe_write_wanted = 0;
2599 evpipe [0] = -1;
2600 evpipe [1] = -1;
1648#if EV_USE_INOTIFY 2601#if EV_USE_INOTIFY
1649 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2602 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1650#endif 2603#endif
1651#if EV_USE_SIGNALFD 2604#if EV_USE_SIGNALFD
1652 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2605 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1653#endif 2606#endif
1654 2607
1655 if (!(flags & 0x0000ffffU)) 2608 if (!(flags & EVBACKEND_MASK))
1656 flags |= ev_recommended_backends (); 2609 flags |= ev_recommended_backends ();
1657 2610
2611#if EV_USE_IOCP
2612 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2613#endif
1658#if EV_USE_PORT 2614#if EV_USE_PORT
1659 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2615 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1660#endif 2616#endif
1661#if EV_USE_KQUEUE 2617#if EV_USE_KQUEUE
1662 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2618 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1679#endif 2635#endif
1680 } 2636 }
1681} 2637}
1682 2638
1683/* free up a loop structure */ 2639/* free up a loop structure */
1684static void noinline 2640void ecb_cold
1685loop_destroy (EV_P) 2641ev_loop_destroy (EV_P)
1686{ 2642{
1687 int i; 2643 int i;
2644
2645#if EV_MULTIPLICITY
2646 /* mimic free (0) */
2647 if (!EV_A)
2648 return;
2649#endif
2650
2651#if EV_CLEANUP_ENABLE
2652 /* queue cleanup watchers (and execute them) */
2653 if (expect_false (cleanupcnt))
2654 {
2655 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2656 EV_INVOKE_PENDING;
2657 }
2658#endif
2659
2660#if EV_CHILD_ENABLE
2661 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2662 {
2663 ev_ref (EV_A); /* child watcher */
2664 ev_signal_stop (EV_A_ &childev);
2665 }
2666#endif
1688 2667
1689 if (ev_is_active (&pipe_w)) 2668 if (ev_is_active (&pipe_w))
1690 { 2669 {
1691 /*ev_ref (EV_A);*/ 2670 /*ev_ref (EV_A);*/
1692 /*ev_io_stop (EV_A_ &pipe_w);*/ 2671 /*ev_io_stop (EV_A_ &pipe_w);*/
1693 2672
1694#if EV_USE_EVENTFD
1695 if (evfd >= 0)
1696 close (evfd);
1697#endif
1698
1699 if (evpipe [0] >= 0)
1700 {
1701 EV_WIN32_CLOSE_FD (evpipe [0]); 2673 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1702 EV_WIN32_CLOSE_FD (evpipe [1]); 2674 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1703 }
1704 } 2675 }
1705 2676
1706#if EV_USE_SIGNALFD 2677#if EV_USE_SIGNALFD
1707 if (ev_is_active (&sigfd_w)) 2678 if (ev_is_active (&sigfd_w))
1708 close (sigfd); 2679 close (sigfd);
… …
1714#endif 2685#endif
1715 2686
1716 if (backend_fd >= 0) 2687 if (backend_fd >= 0)
1717 close (backend_fd); 2688 close (backend_fd);
1718 2689
2690#if EV_USE_IOCP
2691 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2692#endif
1719#if EV_USE_PORT 2693#if EV_USE_PORT
1720 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2694 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1721#endif 2695#endif
1722#if EV_USE_KQUEUE 2696#if EV_USE_KQUEUE
1723 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2697 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1750 array_free (periodic, EMPTY); 2724 array_free (periodic, EMPTY);
1751#endif 2725#endif
1752#if EV_FORK_ENABLE 2726#if EV_FORK_ENABLE
1753 array_free (fork, EMPTY); 2727 array_free (fork, EMPTY);
1754#endif 2728#endif
2729#if EV_CLEANUP_ENABLE
2730 array_free (cleanup, EMPTY);
2731#endif
1755 array_free (prepare, EMPTY); 2732 array_free (prepare, EMPTY);
1756 array_free (check, EMPTY); 2733 array_free (check, EMPTY);
1757#if EV_ASYNC_ENABLE 2734#if EV_ASYNC_ENABLE
1758 array_free (async, EMPTY); 2735 array_free (async, EMPTY);
1759#endif 2736#endif
1760 2737
1761 backend = 0; 2738 backend = 0;
2739
2740#if EV_MULTIPLICITY
2741 if (ev_is_default_loop (EV_A))
2742#endif
2743 ev_default_loop_ptr = 0;
2744#if EV_MULTIPLICITY
2745 else
2746 ev_free (EV_A);
2747#endif
1762} 2748}
1763 2749
1764#if EV_USE_INOTIFY 2750#if EV_USE_INOTIFY
1765inline_size void infy_fork (EV_P); 2751inline_size void infy_fork (EV_P);
1766#endif 2752#endif
… …
1779#endif 2765#endif
1780#if EV_USE_INOTIFY 2766#if EV_USE_INOTIFY
1781 infy_fork (EV_A); 2767 infy_fork (EV_A);
1782#endif 2768#endif
1783 2769
2770#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1784 if (ev_is_active (&pipe_w)) 2771 if (ev_is_active (&pipe_w))
1785 { 2772 {
1786 /* this "locks" the handlers against writing to the pipe */ 2773 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1787 /* while we modify the fd vars */
1788 sig_pending = 1;
1789#if EV_ASYNC_ENABLE
1790 async_pending = 1;
1791#endif
1792 2774
1793 ev_ref (EV_A); 2775 ev_ref (EV_A);
1794 ev_io_stop (EV_A_ &pipe_w); 2776 ev_io_stop (EV_A_ &pipe_w);
1795 2777
1796#if EV_USE_EVENTFD
1797 if (evfd >= 0)
1798 close (evfd);
1799#endif
1800
1801 if (evpipe [0] >= 0) 2778 if (evpipe [0] >= 0)
1802 {
1803 EV_WIN32_CLOSE_FD (evpipe [0]); 2779 EV_WIN32_CLOSE_FD (evpipe [0]);
1804 EV_WIN32_CLOSE_FD (evpipe [1]);
1805 }
1806 2780
1807#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1808 evpipe_init (EV_A); 2781 evpipe_init (EV_A);
1809 /* now iterate over everything, in case we missed something */ 2782 /* iterate over everything, in case we missed something before */
1810 pipecb (EV_A_ &pipe_w, EV_READ); 2783 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1811#endif
1812 } 2784 }
2785#endif
1813 2786
1814 postfork = 0; 2787 postfork = 0;
1815} 2788}
1816 2789
1817#if EV_MULTIPLICITY 2790#if EV_MULTIPLICITY
1818 2791
1819struct ev_loop * 2792struct ev_loop * ecb_cold
1820ev_loop_new (unsigned int flags) 2793ev_loop_new (unsigned int flags) EV_THROW
1821{ 2794{
1822 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2795 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1823 2796
1824 memset (EV_A, 0, sizeof (struct ev_loop)); 2797 memset (EV_A, 0, sizeof (struct ev_loop));
1825 loop_init (EV_A_ flags); 2798 loop_init (EV_A_ flags);
1826 2799
1827 if (ev_backend (EV_A)) 2800 if (ev_backend (EV_A))
1828 return EV_A; 2801 return EV_A;
1829 2802
2803 ev_free (EV_A);
1830 return 0; 2804 return 0;
1831} 2805}
1832 2806
1833void
1834ev_loop_destroy (EV_P)
1835{
1836 loop_destroy (EV_A);
1837 ev_free (loop);
1838}
1839
1840void
1841ev_loop_fork (EV_P)
1842{
1843 postfork = 1; /* must be in line with ev_default_fork */
1844}
1845#endif /* multiplicity */ 2807#endif /* multiplicity */
1846 2808
1847#if EV_VERIFY 2809#if EV_VERIFY
1848static void noinline 2810static void noinline ecb_cold
1849verify_watcher (EV_P_ W w) 2811verify_watcher (EV_P_ W w)
1850{ 2812{
1851 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2813 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1852 2814
1853 if (w->pending) 2815 if (w->pending)
1854 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2816 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1855} 2817}
1856 2818
1857static void noinline 2819static void noinline ecb_cold
1858verify_heap (EV_P_ ANHE *heap, int N) 2820verify_heap (EV_P_ ANHE *heap, int N)
1859{ 2821{
1860 int i; 2822 int i;
1861 2823
1862 for (i = HEAP0; i < N + HEAP0; ++i) 2824 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1867 2829
1868 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2830 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1869 } 2831 }
1870} 2832}
1871 2833
1872static void noinline 2834static void noinline ecb_cold
1873array_verify (EV_P_ W *ws, int cnt) 2835array_verify (EV_P_ W *ws, int cnt)
1874{ 2836{
1875 while (cnt--) 2837 while (cnt--)
1876 { 2838 {
1877 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2839 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1879 } 2841 }
1880} 2842}
1881#endif 2843#endif
1882 2844
1883#if EV_FEATURE_API 2845#if EV_FEATURE_API
1884void 2846void ecb_cold
1885ev_verify (EV_P) 2847ev_verify (EV_P) EV_THROW
1886{ 2848{
1887#if EV_VERIFY 2849#if EV_VERIFY
1888 int i; 2850 int i;
1889 WL w; 2851 WL w, w2;
1890 2852
1891 assert (activecnt >= -1); 2853 assert (activecnt >= -1);
1892 2854
1893 assert (fdchangemax >= fdchangecnt); 2855 assert (fdchangemax >= fdchangecnt);
1894 for (i = 0; i < fdchangecnt; ++i) 2856 for (i = 0; i < fdchangecnt; ++i)
1895 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 2857 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1896 2858
1897 assert (anfdmax >= 0); 2859 assert (anfdmax >= 0);
1898 for (i = 0; i < anfdmax; ++i) 2860 for (i = 0; i < anfdmax; ++i)
2861 {
2862 int j = 0;
2863
1899 for (w = anfds [i].head; w; w = w->next) 2864 for (w = w2 = anfds [i].head; w; w = w->next)
1900 { 2865 {
1901 verify_watcher (EV_A_ (W)w); 2866 verify_watcher (EV_A_ (W)w);
2867
2868 if (j++ & 1)
2869 {
2870 assert (("libev: io watcher list contains a loop", w != w2));
2871 w2 = w2->next;
2872 }
2873
1902 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 2874 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1903 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 2875 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1904 } 2876 }
2877 }
1905 2878
1906 assert (timermax >= timercnt); 2879 assert (timermax >= timercnt);
1907 verify_heap (EV_A_ timers, timercnt); 2880 verify_heap (EV_A_ timers, timercnt);
1908 2881
1909#if EV_PERIODIC_ENABLE 2882#if EV_PERIODIC_ENABLE
… …
1924#if EV_FORK_ENABLE 2897#if EV_FORK_ENABLE
1925 assert (forkmax >= forkcnt); 2898 assert (forkmax >= forkcnt);
1926 array_verify (EV_A_ (W *)forks, forkcnt); 2899 array_verify (EV_A_ (W *)forks, forkcnt);
1927#endif 2900#endif
1928 2901
2902#if EV_CLEANUP_ENABLE
2903 assert (cleanupmax >= cleanupcnt);
2904 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2905#endif
2906
1929#if EV_ASYNC_ENABLE 2907#if EV_ASYNC_ENABLE
1930 assert (asyncmax >= asynccnt); 2908 assert (asyncmax >= asynccnt);
1931 array_verify (EV_A_ (W *)asyncs, asynccnt); 2909 array_verify (EV_A_ (W *)asyncs, asynccnt);
1932#endif 2910#endif
1933 2911
… …
1950#endif 2928#endif
1951} 2929}
1952#endif 2930#endif
1953 2931
1954#if EV_MULTIPLICITY 2932#if EV_MULTIPLICITY
1955struct ev_loop * 2933struct ev_loop * ecb_cold
1956ev_default_loop_init (unsigned int flags)
1957#else 2934#else
1958int 2935int
2936#endif
1959ev_default_loop (unsigned int flags) 2937ev_default_loop (unsigned int flags) EV_THROW
1960#endif
1961{ 2938{
1962 if (!ev_default_loop_ptr) 2939 if (!ev_default_loop_ptr)
1963 { 2940 {
1964#if EV_MULTIPLICITY 2941#if EV_MULTIPLICITY
1965 EV_P = ev_default_loop_ptr = &default_loop_struct; 2942 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1984 2961
1985 return ev_default_loop_ptr; 2962 return ev_default_loop_ptr;
1986} 2963}
1987 2964
1988void 2965void
1989ev_default_destroy (void) 2966ev_loop_fork (EV_P) EV_THROW
1990{ 2967{
1991#if EV_MULTIPLICITY 2968 postfork = 1;
1992 EV_P = ev_default_loop_ptr;
1993#endif
1994
1995 ev_default_loop_ptr = 0;
1996
1997#if EV_CHILD_ENABLE
1998 ev_ref (EV_A); /* child watcher */
1999 ev_signal_stop (EV_A_ &childev);
2000#endif
2001
2002 loop_destroy (EV_A);
2003}
2004
2005void
2006ev_default_fork (void)
2007{
2008#if EV_MULTIPLICITY
2009 EV_P = ev_default_loop_ptr;
2010#endif
2011
2012 postfork = 1; /* must be in line with ev_loop_fork */
2013} 2969}
2014 2970
2015/*****************************************************************************/ 2971/*****************************************************************************/
2016 2972
2017void 2973void
… …
2019{ 2975{
2020 EV_CB_INVOKE ((W)w, revents); 2976 EV_CB_INVOKE ((W)w, revents);
2021} 2977}
2022 2978
2023unsigned int 2979unsigned int
2024ev_pending_count (EV_P) 2980ev_pending_count (EV_P) EV_THROW
2025{ 2981{
2026 int pri; 2982 int pri;
2027 unsigned int count = 0; 2983 unsigned int count = 0;
2028 2984
2029 for (pri = NUMPRI; pri--; ) 2985 for (pri = NUMPRI; pri--; )
… …
2033} 2989}
2034 2990
2035void noinline 2991void noinline
2036ev_invoke_pending (EV_P) 2992ev_invoke_pending (EV_P)
2037{ 2993{
2038 int pri; 2994 pendingpri = NUMPRI;
2039 2995
2040 for (pri = NUMPRI; pri--; ) 2996 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
2997 {
2998 --pendingpri;
2999
2041 while (pendingcnt [pri]) 3000 while (pendingcnt [pendingpri])
2042 { 3001 {
2043 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3002 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2044 3003
2045 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2046 /* ^ this is no longer true, as pending_w could be here */
2047
2048 p->w->pending = 0; 3004 p->w->pending = 0;
2049 EV_CB_INVOKE (p->w, p->events); 3005 EV_CB_INVOKE (p->w, p->events);
2050 EV_FREQUENT_CHECK; 3006 EV_FREQUENT_CHECK;
2051 } 3007 }
3008 }
2052} 3009}
2053 3010
2054#if EV_IDLE_ENABLE 3011#if EV_IDLE_ENABLE
2055/* make idle watchers pending. this handles the "call-idle */ 3012/* make idle watchers pending. this handles the "call-idle */
2056/* only when higher priorities are idle" logic */ 3013/* only when higher priorities are idle" logic */
… …
2113 feed_reverse_done (EV_A_ EV_TIMER); 3070 feed_reverse_done (EV_A_ EV_TIMER);
2114 } 3071 }
2115} 3072}
2116 3073
2117#if EV_PERIODIC_ENABLE 3074#if EV_PERIODIC_ENABLE
3075
3076static void noinline
3077periodic_recalc (EV_P_ ev_periodic *w)
3078{
3079 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3080 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3081
3082 /* the above almost always errs on the low side */
3083 while (at <= ev_rt_now)
3084 {
3085 ev_tstamp nat = at + w->interval;
3086
3087 /* when resolution fails us, we use ev_rt_now */
3088 if (expect_false (nat == at))
3089 {
3090 at = ev_rt_now;
3091 break;
3092 }
3093
3094 at = nat;
3095 }
3096
3097 ev_at (w) = at;
3098}
3099
2118/* make periodics pending */ 3100/* make periodics pending */
2119inline_size void 3101inline_size void
2120periodics_reify (EV_P) 3102periodics_reify (EV_P)
2121{ 3103{
2122 EV_FREQUENT_CHECK; 3104 EV_FREQUENT_CHECK;
2123 3105
2124 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3106 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2125 { 3107 {
2126 int feed_count = 0;
2127
2128 do 3108 do
2129 { 3109 {
2130 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3110 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2131 3111
2132 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3112 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2141 ANHE_at_cache (periodics [HEAP0]); 3121 ANHE_at_cache (periodics [HEAP0]);
2142 downheap (periodics, periodiccnt, HEAP0); 3122 downheap (periodics, periodiccnt, HEAP0);
2143 } 3123 }
2144 else if (w->interval) 3124 else if (w->interval)
2145 { 3125 {
2146 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3126 periodic_recalc (EV_A_ w);
2147 /* if next trigger time is not sufficiently in the future, put it there */
2148 /* this might happen because of floating point inexactness */
2149 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2150 {
2151 ev_at (w) += w->interval;
2152
2153 /* if interval is unreasonably low we might still have a time in the past */
2154 /* so correct this. this will make the periodic very inexact, but the user */
2155 /* has effectively asked to get triggered more often than possible */
2156 if (ev_at (w) < ev_rt_now)
2157 ev_at (w) = ev_rt_now;
2158 }
2159
2160 ANHE_at_cache (periodics [HEAP0]); 3127 ANHE_at_cache (periodics [HEAP0]);
2161 downheap (periodics, periodiccnt, HEAP0); 3128 downheap (periodics, periodiccnt, HEAP0);
2162 } 3129 }
2163 else 3130 else
2164 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3131 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2171 feed_reverse_done (EV_A_ EV_PERIODIC); 3138 feed_reverse_done (EV_A_ EV_PERIODIC);
2172 } 3139 }
2173} 3140}
2174 3141
2175/* simply recalculate all periodics */ 3142/* simply recalculate all periodics */
2176/* TODO: maybe ensure that at leats one event happens when jumping forward? */ 3143/* TODO: maybe ensure that at least one event happens when jumping forward? */
2177static void noinline 3144static void noinline ecb_cold
2178periodics_reschedule (EV_P) 3145periodics_reschedule (EV_P)
2179{ 3146{
2180 int i; 3147 int i;
2181 3148
2182 /* adjust periodics after time jump */ 3149 /* adjust periodics after time jump */
… …
2185 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3152 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2186 3153
2187 if (w->reschedule_cb) 3154 if (w->reschedule_cb)
2188 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3155 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2189 else if (w->interval) 3156 else if (w->interval)
2190 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3157 periodic_recalc (EV_A_ w);
2191 3158
2192 ANHE_at_cache (periodics [i]); 3159 ANHE_at_cache (periodics [i]);
2193 } 3160 }
2194 3161
2195 reheap (periodics, periodiccnt); 3162 reheap (periodics, periodiccnt);
2196} 3163}
2197#endif 3164#endif
2198 3165
2199/* adjust all timers by a given offset */ 3166/* adjust all timers by a given offset */
2200static void noinline 3167static void noinline ecb_cold
2201timers_reschedule (EV_P_ ev_tstamp adjust) 3168timers_reschedule (EV_P_ ev_tstamp adjust)
2202{ 3169{
2203 int i; 3170 int i;
2204 3171
2205 for (i = 0; i < timercnt; ++i) 3172 for (i = 0; i < timercnt; ++i)
… …
2242 * doesn't hurt either as we only do this on time-jumps or 3209 * doesn't hurt either as we only do this on time-jumps or
2243 * in the unlikely event of having been preempted here. 3210 * in the unlikely event of having been preempted here.
2244 */ 3211 */
2245 for (i = 4; --i; ) 3212 for (i = 4; --i; )
2246 { 3213 {
3214 ev_tstamp diff;
2247 rtmn_diff = ev_rt_now - mn_now; 3215 rtmn_diff = ev_rt_now - mn_now;
2248 3216
3217 diff = odiff - rtmn_diff;
3218
2249 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3219 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2250 return; /* all is well */ 3220 return; /* all is well */
2251 3221
2252 ev_rt_now = ev_time (); 3222 ev_rt_now = ev_time ();
2253 mn_now = get_clock (); 3223 mn_now = get_clock ();
2254 now_floor = mn_now; 3224 now_floor = mn_now;
… …
2276 3246
2277 mn_now = ev_rt_now; 3247 mn_now = ev_rt_now;
2278 } 3248 }
2279} 3249}
2280 3250
2281void 3251int
2282ev_loop (EV_P_ int flags) 3252ev_run (EV_P_ int flags)
2283{ 3253{
2284#if EV_FEATURE_API 3254#if EV_FEATURE_API
2285 ++loop_depth; 3255 ++loop_depth;
2286#endif 3256#endif
2287 3257
2288 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE)); 3258 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2289 3259
2290 loop_done = EVUNLOOP_CANCEL; 3260 loop_done = EVBREAK_CANCEL;
2291 3261
2292 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */ 3262 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2293 3263
2294 do 3264 do
2295 { 3265 {
… …
2338 /* calculate blocking time */ 3308 /* calculate blocking time */
2339 { 3309 {
2340 ev_tstamp waittime = 0.; 3310 ev_tstamp waittime = 0.;
2341 ev_tstamp sleeptime = 0.; 3311 ev_tstamp sleeptime = 0.;
2342 3312
3313 /* remember old timestamp for io_blocktime calculation */
3314 ev_tstamp prev_mn_now = mn_now;
3315
3316 /* update time to cancel out callback processing overhead */
3317 time_update (EV_A_ 1e100);
3318
3319 /* from now on, we want a pipe-wake-up */
3320 pipe_write_wanted = 1;
3321
3322 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3323
2343 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3324 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2344 { 3325 {
2345 /* remember old timestamp for io_blocktime calculation */
2346 ev_tstamp prev_mn_now = mn_now;
2347
2348 /* update time to cancel out callback processing overhead */
2349 time_update (EV_A_ 1e100);
2350
2351 waittime = MAX_BLOCKTIME; 3326 waittime = MAX_BLOCKTIME;
2352 3327
2353 if (timercnt) 3328 if (timercnt)
2354 { 3329 {
2355 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3330 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2356 if (waittime > to) waittime = to; 3331 if (waittime > to) waittime = to;
2357 } 3332 }
2358 3333
2359#if EV_PERIODIC_ENABLE 3334#if EV_PERIODIC_ENABLE
2360 if (periodiccnt) 3335 if (periodiccnt)
2361 { 3336 {
2362 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3337 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2363 if (waittime > to) waittime = to; 3338 if (waittime > to) waittime = to;
2364 } 3339 }
2365#endif 3340#endif
2366 3341
2367 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3342 /* don't let timeouts decrease the waittime below timeout_blocktime */
2368 if (expect_false (waittime < timeout_blocktime)) 3343 if (expect_false (waittime < timeout_blocktime))
2369 waittime = timeout_blocktime; 3344 waittime = timeout_blocktime;
3345
3346 /* at this point, we NEED to wait, so we have to ensure */
3347 /* to pass a minimum nonzero value to the backend */
3348 if (expect_false (waittime < backend_mintime))
3349 waittime = backend_mintime;
2370 3350
2371 /* extra check because io_blocktime is commonly 0 */ 3351 /* extra check because io_blocktime is commonly 0 */
2372 if (expect_false (io_blocktime)) 3352 if (expect_false (io_blocktime))
2373 { 3353 {
2374 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3354 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2375 3355
2376 if (sleeptime > waittime - backend_fudge) 3356 if (sleeptime > waittime - backend_mintime)
2377 sleeptime = waittime - backend_fudge; 3357 sleeptime = waittime - backend_mintime;
2378 3358
2379 if (expect_true (sleeptime > 0.)) 3359 if (expect_true (sleeptime > 0.))
2380 { 3360 {
2381 ev_sleep (sleeptime); 3361 ev_sleep (sleeptime);
2382 waittime -= sleeptime; 3362 waittime -= sleeptime;
… …
2385 } 3365 }
2386 3366
2387#if EV_FEATURE_API 3367#if EV_FEATURE_API
2388 ++loop_count; 3368 ++loop_count;
2389#endif 3369#endif
2390 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */ 3370 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2391 backend_poll (EV_A_ waittime); 3371 backend_poll (EV_A_ waittime);
2392 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */ 3372 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3373
3374 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3375
3376 ECB_MEMORY_FENCE_ACQUIRE;
3377 if (pipe_write_skipped)
3378 {
3379 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3380 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3381 }
3382
2393 3383
2394 /* update ev_rt_now, do magic */ 3384 /* update ev_rt_now, do magic */
2395 time_update (EV_A_ waittime + sleeptime); 3385 time_update (EV_A_ waittime + sleeptime);
2396 } 3386 }
2397 3387
… …
2415 EV_INVOKE_PENDING; 3405 EV_INVOKE_PENDING;
2416 } 3406 }
2417 while (expect_true ( 3407 while (expect_true (
2418 activecnt 3408 activecnt
2419 && !loop_done 3409 && !loop_done
2420 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3410 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2421 )); 3411 ));
2422 3412
2423 if (loop_done == EVUNLOOP_ONE) 3413 if (loop_done == EVBREAK_ONE)
2424 loop_done = EVUNLOOP_CANCEL; 3414 loop_done = EVBREAK_CANCEL;
2425 3415
2426#if EV_FEATURE_API 3416#if EV_FEATURE_API
2427 --loop_depth; 3417 --loop_depth;
2428#endif 3418#endif
3419
3420 return activecnt;
2429} 3421}
2430 3422
2431void 3423void
2432ev_unloop (EV_P_ int how) 3424ev_break (EV_P_ int how) EV_THROW
2433{ 3425{
2434 loop_done = how; 3426 loop_done = how;
2435} 3427}
2436 3428
2437void 3429void
2438ev_ref (EV_P) 3430ev_ref (EV_P) EV_THROW
2439{ 3431{
2440 ++activecnt; 3432 ++activecnt;
2441} 3433}
2442 3434
2443void 3435void
2444ev_unref (EV_P) 3436ev_unref (EV_P) EV_THROW
2445{ 3437{
2446 --activecnt; 3438 --activecnt;
2447} 3439}
2448 3440
2449void 3441void
2450ev_now_update (EV_P) 3442ev_now_update (EV_P) EV_THROW
2451{ 3443{
2452 time_update (EV_A_ 1e100); 3444 time_update (EV_A_ 1e100);
2453} 3445}
2454 3446
2455void 3447void
2456ev_suspend (EV_P) 3448ev_suspend (EV_P) EV_THROW
2457{ 3449{
2458 ev_now_update (EV_A); 3450 ev_now_update (EV_A);
2459} 3451}
2460 3452
2461void 3453void
2462ev_resume (EV_P) 3454ev_resume (EV_P) EV_THROW
2463{ 3455{
2464 ev_tstamp mn_prev = mn_now; 3456 ev_tstamp mn_prev = mn_now;
2465 3457
2466 ev_now_update (EV_A); 3458 ev_now_update (EV_A);
2467 timers_reschedule (EV_A_ mn_now - mn_prev); 3459 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2506 w->pending = 0; 3498 w->pending = 0;
2507 } 3499 }
2508} 3500}
2509 3501
2510int 3502int
2511ev_clear_pending (EV_P_ void *w) 3503ev_clear_pending (EV_P_ void *w) EV_THROW
2512{ 3504{
2513 W w_ = (W)w; 3505 W w_ = (W)w;
2514 int pending = w_->pending; 3506 int pending = w_->pending;
2515 3507
2516 if (expect_true (pending)) 3508 if (expect_true (pending))
… …
2549} 3541}
2550 3542
2551/*****************************************************************************/ 3543/*****************************************************************************/
2552 3544
2553void noinline 3545void noinline
2554ev_io_start (EV_P_ ev_io *w) 3546ev_io_start (EV_P_ ev_io *w) EV_THROW
2555{ 3547{
2556 int fd = w->fd; 3548 int fd = w->fd;
2557 3549
2558 if (expect_false (ev_is_active (w))) 3550 if (expect_false (ev_is_active (w)))
2559 return; 3551 return;
… …
2565 3557
2566 ev_start (EV_A_ (W)w, 1); 3558 ev_start (EV_A_ (W)w, 1);
2567 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3559 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2568 wlist_add (&anfds[fd].head, (WL)w); 3560 wlist_add (&anfds[fd].head, (WL)w);
2569 3561
3562 /* common bug, apparently */
3563 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3564
2570 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3565 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2571 w->events &= ~EV__IOFDSET; 3566 w->events &= ~EV__IOFDSET;
2572 3567
2573 EV_FREQUENT_CHECK; 3568 EV_FREQUENT_CHECK;
2574} 3569}
2575 3570
2576void noinline 3571void noinline
2577ev_io_stop (EV_P_ ev_io *w) 3572ev_io_stop (EV_P_ ev_io *w) EV_THROW
2578{ 3573{
2579 clear_pending (EV_A_ (W)w); 3574 clear_pending (EV_A_ (W)w);
2580 if (expect_false (!ev_is_active (w))) 3575 if (expect_false (!ev_is_active (w)))
2581 return; 3576 return;
2582 3577
… …
2585 EV_FREQUENT_CHECK; 3580 EV_FREQUENT_CHECK;
2586 3581
2587 wlist_del (&anfds[w->fd].head, (WL)w); 3582 wlist_del (&anfds[w->fd].head, (WL)w);
2588 ev_stop (EV_A_ (W)w); 3583 ev_stop (EV_A_ (W)w);
2589 3584
2590 fd_change (EV_A_ w->fd, 1); 3585 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2591 3586
2592 EV_FREQUENT_CHECK; 3587 EV_FREQUENT_CHECK;
2593} 3588}
2594 3589
2595void noinline 3590void noinline
2596ev_timer_start (EV_P_ ev_timer *w) 3591ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2597{ 3592{
2598 if (expect_false (ev_is_active (w))) 3593 if (expect_false (ev_is_active (w)))
2599 return; 3594 return;
2600 3595
2601 ev_at (w) += mn_now; 3596 ev_at (w) += mn_now;
… …
2615 3610
2616 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3611 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2617} 3612}
2618 3613
2619void noinline 3614void noinline
2620ev_timer_stop (EV_P_ ev_timer *w) 3615ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2621{ 3616{
2622 clear_pending (EV_A_ (W)w); 3617 clear_pending (EV_A_ (W)w);
2623 if (expect_false (!ev_is_active (w))) 3618 if (expect_false (!ev_is_active (w)))
2624 return; 3619 return;
2625 3620
… …
2645 3640
2646 EV_FREQUENT_CHECK; 3641 EV_FREQUENT_CHECK;
2647} 3642}
2648 3643
2649void noinline 3644void noinline
2650ev_timer_again (EV_P_ ev_timer *w) 3645ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2651{ 3646{
2652 EV_FREQUENT_CHECK; 3647 EV_FREQUENT_CHECK;
3648
3649 clear_pending (EV_A_ (W)w);
2653 3650
2654 if (ev_is_active (w)) 3651 if (ev_is_active (w))
2655 { 3652 {
2656 if (w->repeat) 3653 if (w->repeat)
2657 { 3654 {
… …
2670 3667
2671 EV_FREQUENT_CHECK; 3668 EV_FREQUENT_CHECK;
2672} 3669}
2673 3670
2674ev_tstamp 3671ev_tstamp
2675ev_timer_remaining (EV_P_ ev_timer *w) 3672ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
2676{ 3673{
2677 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 3674 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2678} 3675}
2679 3676
2680#if EV_PERIODIC_ENABLE 3677#if EV_PERIODIC_ENABLE
2681void noinline 3678void noinline
2682ev_periodic_start (EV_P_ ev_periodic *w) 3679ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2683{ 3680{
2684 if (expect_false (ev_is_active (w))) 3681 if (expect_false (ev_is_active (w)))
2685 return; 3682 return;
2686 3683
2687 if (w->reschedule_cb) 3684 if (w->reschedule_cb)
2688 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3685 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2689 else if (w->interval) 3686 else if (w->interval)
2690 { 3687 {
2691 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 3688 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2692 /* this formula differs from the one in periodic_reify because we do not always round up */ 3689 periodic_recalc (EV_A_ w);
2693 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2694 } 3690 }
2695 else 3691 else
2696 ev_at (w) = w->offset; 3692 ev_at (w) = w->offset;
2697 3693
2698 EV_FREQUENT_CHECK; 3694 EV_FREQUENT_CHECK;
… …
2708 3704
2709 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3705 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2710} 3706}
2711 3707
2712void noinline 3708void noinline
2713ev_periodic_stop (EV_P_ ev_periodic *w) 3709ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2714{ 3710{
2715 clear_pending (EV_A_ (W)w); 3711 clear_pending (EV_A_ (W)w);
2716 if (expect_false (!ev_is_active (w))) 3712 if (expect_false (!ev_is_active (w)))
2717 return; 3713 return;
2718 3714
… …
2736 3732
2737 EV_FREQUENT_CHECK; 3733 EV_FREQUENT_CHECK;
2738} 3734}
2739 3735
2740void noinline 3736void noinline
2741ev_periodic_again (EV_P_ ev_periodic *w) 3737ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2742{ 3738{
2743 /* TODO: use adjustheap and recalculation */ 3739 /* TODO: use adjustheap and recalculation */
2744 ev_periodic_stop (EV_A_ w); 3740 ev_periodic_stop (EV_A_ w);
2745 ev_periodic_start (EV_A_ w); 3741 ev_periodic_start (EV_A_ w);
2746} 3742}
… …
2751#endif 3747#endif
2752 3748
2753#if EV_SIGNAL_ENABLE 3749#if EV_SIGNAL_ENABLE
2754 3750
2755void noinline 3751void noinline
2756ev_signal_start (EV_P_ ev_signal *w) 3752ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2757{ 3753{
2758 if (expect_false (ev_is_active (w))) 3754 if (expect_false (ev_is_active (w)))
2759 return; 3755 return;
2760 3756
2761 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 3757 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
2763#if EV_MULTIPLICITY 3759#if EV_MULTIPLICITY
2764 assert (("libev: a signal must not be attached to two different loops", 3760 assert (("libev: a signal must not be attached to two different loops",
2765 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 3761 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2766 3762
2767 signals [w->signum - 1].loop = EV_A; 3763 signals [w->signum - 1].loop = EV_A;
3764 ECB_MEMORY_FENCE_RELEASE;
2768#endif 3765#endif
2769 3766
2770 EV_FREQUENT_CHECK; 3767 EV_FREQUENT_CHECK;
2771 3768
2772#if EV_USE_SIGNALFD 3769#if EV_USE_SIGNALFD
… …
2819 sa.sa_handler = ev_sighandler; 3816 sa.sa_handler = ev_sighandler;
2820 sigfillset (&sa.sa_mask); 3817 sigfillset (&sa.sa_mask);
2821 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3818 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2822 sigaction (w->signum, &sa, 0); 3819 sigaction (w->signum, &sa, 0);
2823 3820
3821 if (origflags & EVFLAG_NOSIGMASK)
3822 {
2824 sigemptyset (&sa.sa_mask); 3823 sigemptyset (&sa.sa_mask);
2825 sigaddset (&sa.sa_mask, w->signum); 3824 sigaddset (&sa.sa_mask, w->signum);
2826 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 3825 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3826 }
2827#endif 3827#endif
2828 } 3828 }
2829 3829
2830 EV_FREQUENT_CHECK; 3830 EV_FREQUENT_CHECK;
2831} 3831}
2832 3832
2833void noinline 3833void noinline
2834ev_signal_stop (EV_P_ ev_signal *w) 3834ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2835{ 3835{
2836 clear_pending (EV_A_ (W)w); 3836 clear_pending (EV_A_ (W)w);
2837 if (expect_false (!ev_is_active (w))) 3837 if (expect_false (!ev_is_active (w)))
2838 return; 3838 return;
2839 3839
… …
2870#endif 3870#endif
2871 3871
2872#if EV_CHILD_ENABLE 3872#if EV_CHILD_ENABLE
2873 3873
2874void 3874void
2875ev_child_start (EV_P_ ev_child *w) 3875ev_child_start (EV_P_ ev_child *w) EV_THROW
2876{ 3876{
2877#if EV_MULTIPLICITY 3877#if EV_MULTIPLICITY
2878 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3878 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2879#endif 3879#endif
2880 if (expect_false (ev_is_active (w))) 3880 if (expect_false (ev_is_active (w)))
… …
2887 3887
2888 EV_FREQUENT_CHECK; 3888 EV_FREQUENT_CHECK;
2889} 3889}
2890 3890
2891void 3891void
2892ev_child_stop (EV_P_ ev_child *w) 3892ev_child_stop (EV_P_ ev_child *w) EV_THROW
2893{ 3893{
2894 clear_pending (EV_A_ (W)w); 3894 clear_pending (EV_A_ (W)w);
2895 if (expect_false (!ev_is_active (w))) 3895 if (expect_false (!ev_is_active (w)))
2896 return; 3896 return;
2897 3897
… …
2924# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 3924# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2925 3925
2926static void noinline 3926static void noinline
2927infy_add (EV_P_ ev_stat *w) 3927infy_add (EV_P_ ev_stat *w)
2928{ 3928{
2929 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); 3929 w->wd = inotify_add_watch (fs_fd, w->path,
3930 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
3931 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
3932 | IN_DONT_FOLLOW | IN_MASK_ADD);
2930 3933
2931 if (w->wd >= 0) 3934 if (w->wd >= 0)
2932 { 3935 {
2933 struct statfs sfs; 3936 struct statfs sfs;
2934 3937
… …
2938 3941
2939 if (!fs_2625) 3942 if (!fs_2625)
2940 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 3943 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2941 else if (!statfs (w->path, &sfs) 3944 else if (!statfs (w->path, &sfs)
2942 && (sfs.f_type == 0x1373 /* devfs */ 3945 && (sfs.f_type == 0x1373 /* devfs */
3946 || sfs.f_type == 0x4006 /* fat */
3947 || sfs.f_type == 0x4d44 /* msdos */
2943 || sfs.f_type == 0xEF53 /* ext2/3 */ 3948 || sfs.f_type == 0xEF53 /* ext2/3 */
3949 || sfs.f_type == 0x72b6 /* jffs2 */
3950 || sfs.f_type == 0x858458f6 /* ramfs */
3951 || sfs.f_type == 0x5346544e /* ntfs */
2944 || sfs.f_type == 0x3153464a /* jfs */ 3952 || sfs.f_type == 0x3153464a /* jfs */
3953 || sfs.f_type == 0x9123683e /* btrfs */
2945 || sfs.f_type == 0x52654973 /* reiser3 */ 3954 || sfs.f_type == 0x52654973 /* reiser3 */
2946 || sfs.f_type == 0x01021994 /* tempfs */ 3955 || sfs.f_type == 0x01021994 /* tmpfs */
2947 || sfs.f_type == 0x58465342 /* xfs */)) 3956 || sfs.f_type == 0x58465342 /* xfs */))
2948 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 3957 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2949 else 3958 else
2950 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 3959 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2951 } 3960 }
… …
2972 if (!pend || pend == path) 3981 if (!pend || pend == path)
2973 break; 3982 break;
2974 3983
2975 *pend = 0; 3984 *pend = 0;
2976 w->wd = inotify_add_watch (fs_fd, path, mask); 3985 w->wd = inotify_add_watch (fs_fd, path, mask);
2977 } 3986 }
2978 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3987 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2979 } 3988 }
2980 } 3989 }
2981 3990
2982 if (w->wd >= 0) 3991 if (w->wd >= 0)
… …
3049 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4058 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3050 ofs += sizeof (struct inotify_event) + ev->len; 4059 ofs += sizeof (struct inotify_event) + ev->len;
3051 } 4060 }
3052} 4061}
3053 4062
3054inline_size unsigned int
3055ev_linux_version (void)
3056{
3057 struct utsname buf;
3058 unsigned int v;
3059 int i;
3060 char *p = buf.release;
3061
3062 if (uname (&buf))
3063 return 0;
3064
3065 for (i = 3+1; --i; )
3066 {
3067 unsigned int c = 0;
3068
3069 for (;;)
3070 {
3071 if (*p >= '0' && *p <= '9')
3072 c = c * 10 + *p++ - '0';
3073 else
3074 {
3075 p += *p == '.';
3076 break;
3077 }
3078 }
3079
3080 v = (v << 8) | c;
3081 }
3082
3083 return v;
3084}
3085
3086inline_size void 4063inline_size void ecb_cold
3087ev_check_2625 (EV_P) 4064ev_check_2625 (EV_P)
3088{ 4065{
3089 /* kernels < 2.6.25 are borked 4066 /* kernels < 2.6.25 are borked
3090 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4067 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3091 */ 4068 */
… …
3096} 4073}
3097 4074
3098inline_size int 4075inline_size int
3099infy_newfd (void) 4076infy_newfd (void)
3100{ 4077{
3101#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4078#if defined IN_CLOEXEC && defined IN_NONBLOCK
3102 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4079 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3103 if (fd >= 0) 4080 if (fd >= 0)
3104 return fd; 4081 return fd;
3105#endif 4082#endif
3106 return inotify_init (); 4083 return inotify_init ();
… …
3181#else 4158#else
3182# define EV_LSTAT(p,b) lstat (p, b) 4159# define EV_LSTAT(p,b) lstat (p, b)
3183#endif 4160#endif
3184 4161
3185void 4162void
3186ev_stat_stat (EV_P_ ev_stat *w) 4163ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3187{ 4164{
3188 if (lstat (w->path, &w->attr) < 0) 4165 if (lstat (w->path, &w->attr) < 0)
3189 w->attr.st_nlink = 0; 4166 w->attr.st_nlink = 0;
3190 else if (!w->attr.st_nlink) 4167 else if (!w->attr.st_nlink)
3191 w->attr.st_nlink = 1; 4168 w->attr.st_nlink = 1;
… …
3230 ev_feed_event (EV_A_ w, EV_STAT); 4207 ev_feed_event (EV_A_ w, EV_STAT);
3231 } 4208 }
3232} 4209}
3233 4210
3234void 4211void
3235ev_stat_start (EV_P_ ev_stat *w) 4212ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3236{ 4213{
3237 if (expect_false (ev_is_active (w))) 4214 if (expect_false (ev_is_active (w)))
3238 return; 4215 return;
3239 4216
3240 ev_stat_stat (EV_A_ w); 4217 ev_stat_stat (EV_A_ w);
… …
3261 4238
3262 EV_FREQUENT_CHECK; 4239 EV_FREQUENT_CHECK;
3263} 4240}
3264 4241
3265void 4242void
3266ev_stat_stop (EV_P_ ev_stat *w) 4243ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3267{ 4244{
3268 clear_pending (EV_A_ (W)w); 4245 clear_pending (EV_A_ (W)w);
3269 if (expect_false (!ev_is_active (w))) 4246 if (expect_false (!ev_is_active (w)))
3270 return; 4247 return;
3271 4248
… …
3287} 4264}
3288#endif 4265#endif
3289 4266
3290#if EV_IDLE_ENABLE 4267#if EV_IDLE_ENABLE
3291void 4268void
3292ev_idle_start (EV_P_ ev_idle *w) 4269ev_idle_start (EV_P_ ev_idle *w) EV_THROW
3293{ 4270{
3294 if (expect_false (ev_is_active (w))) 4271 if (expect_false (ev_is_active (w)))
3295 return; 4272 return;
3296 4273
3297 pri_adjust (EV_A_ (W)w); 4274 pri_adjust (EV_A_ (W)w);
… …
3310 4287
3311 EV_FREQUENT_CHECK; 4288 EV_FREQUENT_CHECK;
3312} 4289}
3313 4290
3314void 4291void
3315ev_idle_stop (EV_P_ ev_idle *w) 4292ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3316{ 4293{
3317 clear_pending (EV_A_ (W)w); 4294 clear_pending (EV_A_ (W)w);
3318 if (expect_false (!ev_is_active (w))) 4295 if (expect_false (!ev_is_active (w)))
3319 return; 4296 return;
3320 4297
… …
3334} 4311}
3335#endif 4312#endif
3336 4313
3337#if EV_PREPARE_ENABLE 4314#if EV_PREPARE_ENABLE
3338void 4315void
3339ev_prepare_start (EV_P_ ev_prepare *w) 4316ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
3340{ 4317{
3341 if (expect_false (ev_is_active (w))) 4318 if (expect_false (ev_is_active (w)))
3342 return; 4319 return;
3343 4320
3344 EV_FREQUENT_CHECK; 4321 EV_FREQUENT_CHECK;
… …
3349 4326
3350 EV_FREQUENT_CHECK; 4327 EV_FREQUENT_CHECK;
3351} 4328}
3352 4329
3353void 4330void
3354ev_prepare_stop (EV_P_ ev_prepare *w) 4331ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
3355{ 4332{
3356 clear_pending (EV_A_ (W)w); 4333 clear_pending (EV_A_ (W)w);
3357 if (expect_false (!ev_is_active (w))) 4334 if (expect_false (!ev_is_active (w)))
3358 return; 4335 return;
3359 4336
… …
3372} 4349}
3373#endif 4350#endif
3374 4351
3375#if EV_CHECK_ENABLE 4352#if EV_CHECK_ENABLE
3376void 4353void
3377ev_check_start (EV_P_ ev_check *w) 4354ev_check_start (EV_P_ ev_check *w) EV_THROW
3378{ 4355{
3379 if (expect_false (ev_is_active (w))) 4356 if (expect_false (ev_is_active (w)))
3380 return; 4357 return;
3381 4358
3382 EV_FREQUENT_CHECK; 4359 EV_FREQUENT_CHECK;
… …
3387 4364
3388 EV_FREQUENT_CHECK; 4365 EV_FREQUENT_CHECK;
3389} 4366}
3390 4367
3391void 4368void
3392ev_check_stop (EV_P_ ev_check *w) 4369ev_check_stop (EV_P_ ev_check *w) EV_THROW
3393{ 4370{
3394 clear_pending (EV_A_ (W)w); 4371 clear_pending (EV_A_ (W)w);
3395 if (expect_false (!ev_is_active (w))) 4372 if (expect_false (!ev_is_active (w)))
3396 return; 4373 return;
3397 4374
… …
3410} 4387}
3411#endif 4388#endif
3412 4389
3413#if EV_EMBED_ENABLE 4390#if EV_EMBED_ENABLE
3414void noinline 4391void noinline
3415ev_embed_sweep (EV_P_ ev_embed *w) 4392ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
3416{ 4393{
3417 ev_loop (w->other, EVLOOP_NONBLOCK); 4394 ev_run (w->other, EVRUN_NOWAIT);
3418} 4395}
3419 4396
3420static void 4397static void
3421embed_io_cb (EV_P_ ev_io *io, int revents) 4398embed_io_cb (EV_P_ ev_io *io, int revents)
3422{ 4399{
3423 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4400 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3424 4401
3425 if (ev_cb (w)) 4402 if (ev_cb (w))
3426 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4403 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3427 else 4404 else
3428 ev_loop (w->other, EVLOOP_NONBLOCK); 4405 ev_run (w->other, EVRUN_NOWAIT);
3429} 4406}
3430 4407
3431static void 4408static void
3432embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4409embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3433{ 4410{
… …
3437 EV_P = w->other; 4414 EV_P = w->other;
3438 4415
3439 while (fdchangecnt) 4416 while (fdchangecnt)
3440 { 4417 {
3441 fd_reify (EV_A); 4418 fd_reify (EV_A);
3442 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4419 ev_run (EV_A_ EVRUN_NOWAIT);
3443 } 4420 }
3444 } 4421 }
3445} 4422}
3446 4423
3447static void 4424static void
… …
3453 4430
3454 { 4431 {
3455 EV_P = w->other; 4432 EV_P = w->other;
3456 4433
3457 ev_loop_fork (EV_A); 4434 ev_loop_fork (EV_A);
3458 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4435 ev_run (EV_A_ EVRUN_NOWAIT);
3459 } 4436 }
3460 4437
3461 ev_embed_start (EV_A_ w); 4438 ev_embed_start (EV_A_ w);
3462} 4439}
3463 4440
… …
3468 ev_idle_stop (EV_A_ idle); 4445 ev_idle_stop (EV_A_ idle);
3469} 4446}
3470#endif 4447#endif
3471 4448
3472void 4449void
3473ev_embed_start (EV_P_ ev_embed *w) 4450ev_embed_start (EV_P_ ev_embed *w) EV_THROW
3474{ 4451{
3475 if (expect_false (ev_is_active (w))) 4452 if (expect_false (ev_is_active (w)))
3476 return; 4453 return;
3477 4454
3478 { 4455 {
… …
3499 4476
3500 EV_FREQUENT_CHECK; 4477 EV_FREQUENT_CHECK;
3501} 4478}
3502 4479
3503void 4480void
3504ev_embed_stop (EV_P_ ev_embed *w) 4481ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
3505{ 4482{
3506 clear_pending (EV_A_ (W)w); 4483 clear_pending (EV_A_ (W)w);
3507 if (expect_false (!ev_is_active (w))) 4484 if (expect_false (!ev_is_active (w)))
3508 return; 4485 return;
3509 4486
… …
3519} 4496}
3520#endif 4497#endif
3521 4498
3522#if EV_FORK_ENABLE 4499#if EV_FORK_ENABLE
3523void 4500void
3524ev_fork_start (EV_P_ ev_fork *w) 4501ev_fork_start (EV_P_ ev_fork *w) EV_THROW
3525{ 4502{
3526 if (expect_false (ev_is_active (w))) 4503 if (expect_false (ev_is_active (w)))
3527 return; 4504 return;
3528 4505
3529 EV_FREQUENT_CHECK; 4506 EV_FREQUENT_CHECK;
… …
3534 4511
3535 EV_FREQUENT_CHECK; 4512 EV_FREQUENT_CHECK;
3536} 4513}
3537 4514
3538void 4515void
3539ev_fork_stop (EV_P_ ev_fork *w) 4516ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
3540{ 4517{
3541 clear_pending (EV_A_ (W)w); 4518 clear_pending (EV_A_ (W)w);
3542 if (expect_false (!ev_is_active (w))) 4519 if (expect_false (!ev_is_active (w)))
3543 return; 4520 return;
3544 4521
… …
3555 4532
3556 EV_FREQUENT_CHECK; 4533 EV_FREQUENT_CHECK;
3557} 4534}
3558#endif 4535#endif
3559 4536
4537#if EV_CLEANUP_ENABLE
4538void
4539ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4540{
4541 if (expect_false (ev_is_active (w)))
4542 return;
4543
4544 EV_FREQUENT_CHECK;
4545
4546 ev_start (EV_A_ (W)w, ++cleanupcnt);
4547 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4548 cleanups [cleanupcnt - 1] = w;
4549
4550 /* cleanup watchers should never keep a refcount on the loop */
4551 ev_unref (EV_A);
4552 EV_FREQUENT_CHECK;
4553}
4554
4555void
4556ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4557{
4558 clear_pending (EV_A_ (W)w);
4559 if (expect_false (!ev_is_active (w)))
4560 return;
4561
4562 EV_FREQUENT_CHECK;
4563 ev_ref (EV_A);
4564
4565 {
4566 int active = ev_active (w);
4567
4568 cleanups [active - 1] = cleanups [--cleanupcnt];
4569 ev_active (cleanups [active - 1]) = active;
4570 }
4571
4572 ev_stop (EV_A_ (W)w);
4573
4574 EV_FREQUENT_CHECK;
4575}
4576#endif
4577
3560#if EV_ASYNC_ENABLE 4578#if EV_ASYNC_ENABLE
3561void 4579void
3562ev_async_start (EV_P_ ev_async *w) 4580ev_async_start (EV_P_ ev_async *w) EV_THROW
3563{ 4581{
3564 if (expect_false (ev_is_active (w))) 4582 if (expect_false (ev_is_active (w)))
3565 return; 4583 return;
4584
4585 w->sent = 0;
3566 4586
3567 evpipe_init (EV_A); 4587 evpipe_init (EV_A);
3568 4588
3569 EV_FREQUENT_CHECK; 4589 EV_FREQUENT_CHECK;
3570 4590
… …
3574 4594
3575 EV_FREQUENT_CHECK; 4595 EV_FREQUENT_CHECK;
3576} 4596}
3577 4597
3578void 4598void
3579ev_async_stop (EV_P_ ev_async *w) 4599ev_async_stop (EV_P_ ev_async *w) EV_THROW
3580{ 4600{
3581 clear_pending (EV_A_ (W)w); 4601 clear_pending (EV_A_ (W)w);
3582 if (expect_false (!ev_is_active (w))) 4602 if (expect_false (!ev_is_active (w)))
3583 return; 4603 return;
3584 4604
… …
3595 4615
3596 EV_FREQUENT_CHECK; 4616 EV_FREQUENT_CHECK;
3597} 4617}
3598 4618
3599void 4619void
3600ev_async_send (EV_P_ ev_async *w) 4620ev_async_send (EV_P_ ev_async *w) EV_THROW
3601{ 4621{
3602 w->sent = 1; 4622 w->sent = 1;
3603 evpipe_write (EV_A_ &async_pending); 4623 evpipe_write (EV_A_ &async_pending);
3604} 4624}
3605#endif 4625#endif
… …
3642 4662
3643 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 4663 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3644} 4664}
3645 4665
3646void 4666void
3647ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4667ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
3648{ 4668{
3649 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4669 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3650 4670
3651 if (expect_false (!once)) 4671 if (expect_false (!once))
3652 { 4672 {
… …
3673} 4693}
3674 4694
3675/*****************************************************************************/ 4695/*****************************************************************************/
3676 4696
3677#if EV_WALK_ENABLE 4697#if EV_WALK_ENABLE
3678void 4698void ecb_cold
3679ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 4699ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
3680{ 4700{
3681 int i, j; 4701 int i, j;
3682 ev_watcher_list *wl, *wn; 4702 ev_watcher_list *wl, *wn;
3683 4703
3684 if (types & (EV_IO | EV_EMBED)) 4704 if (types & (EV_IO | EV_EMBED))
… …
3727 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 4747 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3728#endif 4748#endif
3729 4749
3730#if EV_IDLE_ENABLE 4750#if EV_IDLE_ENABLE
3731 if (types & EV_IDLE) 4751 if (types & EV_IDLE)
3732 for (j = NUMPRI; i--; ) 4752 for (j = NUMPRI; j--; )
3733 for (i = idlecnt [j]; i--; ) 4753 for (i = idlecnt [j]; i--; )
3734 cb (EV_A_ EV_IDLE, idles [j][i]); 4754 cb (EV_A_ EV_IDLE, idles [j][i]);
3735#endif 4755#endif
3736 4756
3737#if EV_FORK_ENABLE 4757#if EV_FORK_ENABLE
… …
3790 4810
3791#if EV_MULTIPLICITY 4811#if EV_MULTIPLICITY
3792 #include "ev_wrap.h" 4812 #include "ev_wrap.h"
3793#endif 4813#endif
3794 4814
3795#ifdef __cplusplus
3796}
3797#endif
3798

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