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Comparing libev/ev.c (file contents):
Revision 1.115 by root, Wed Nov 14 04:53:21 2007 UTC vs.
Revision 1.305 by root, Sun Jul 19 03:49:04 2009 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009 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 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
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-
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-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
31 39
32#ifdef __cplusplus 40#ifdef __cplusplus
33extern "C" { 41extern "C" {
34#endif 42#endif
35 43
44/* this big block deduces configuration from config.h */
36#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
37# include "config.h" 49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 0
57# endif
58# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1
60# endif
61# endif
62# elif !defined(EV_USE_CLOCK_SYSCALL)
63# define EV_USE_CLOCK_SYSCALL 0
64# endif
38 65
39# if HAVE_CLOCK_GETTIME 66# if HAVE_CLOCK_GETTIME
40# ifndef EV_USE_MONOTONIC 67# ifndef EV_USE_MONOTONIC
41# define EV_USE_MONOTONIC 1 68# define EV_USE_MONOTONIC 1
42# endif 69# endif
43# ifndef EV_USE_REALTIME 70# ifndef EV_USE_REALTIME
44# define EV_USE_REALTIME 1 71# define EV_USE_REALTIME 0
72# endif
73# else
74# ifndef EV_USE_MONOTONIC
75# define EV_USE_MONOTONIC 0
76# endif
77# ifndef EV_USE_REALTIME
78# define EV_USE_REALTIME 0
45# endif 79# endif
46# endif 80# endif
47 81
48# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT) 82# ifndef EV_USE_NANOSLEEP
83# if HAVE_NANOSLEEP
49# define EV_USE_SELECT 1 84# define EV_USE_NANOSLEEP 1
85# else
86# define EV_USE_NANOSLEEP 0
87# endif
50# endif 88# endif
51 89
52# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL) 90# ifndef EV_USE_SELECT
91# if HAVE_SELECT && HAVE_SYS_SELECT_H
53# define EV_USE_POLL 1 92# define EV_USE_SELECT 1
93# else
94# define EV_USE_SELECT 0
95# endif
54# endif 96# endif
55 97
56# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL) 98# ifndef EV_USE_POLL
99# if HAVE_POLL && HAVE_POLL_H
57# define EV_USE_EPOLL 1 100# define EV_USE_POLL 1
101# else
102# define EV_USE_POLL 0
103# endif
58# endif 104# endif
59 105
60# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE) 106# ifndef EV_USE_EPOLL
107# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
61# define EV_USE_KQUEUE 1 108# define EV_USE_EPOLL 1
109# else
110# define EV_USE_EPOLL 0
111# endif
62# endif 112# endif
113
114# ifndef EV_USE_KQUEUE
115# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
116# define EV_USE_KQUEUE 1
117# else
118# define EV_USE_KQUEUE 0
119# endif
120# endif
121
122# ifndef EV_USE_PORT
123# if HAVE_PORT_H && HAVE_PORT_CREATE
124# define EV_USE_PORT 1
125# else
126# define EV_USE_PORT 0
127# endif
128# endif
63 129
130# ifndef EV_USE_INOTIFY
131# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
132# define EV_USE_INOTIFY 1
133# else
134# define EV_USE_INOTIFY 0
135# endif
136# endif
137
138# ifndef EV_USE_SIGNALFD
139# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
140# define EV_USE_SIGNALFD 1
141# else
142# define EV_USE_SIGNALFD 0
143# endif
144# endif
145
146# ifndef EV_USE_EVENTFD
147# if HAVE_EVENTFD
148# define EV_USE_EVENTFD 1
149# else
150# define EV_USE_EVENTFD 0
151# endif
152# endif
153
64#endif 154#endif
65 155
66#include <math.h> 156#include <math.h>
67#include <stdlib.h> 157#include <stdlib.h>
68#include <fcntl.h> 158#include <fcntl.h>
… …
75#include <sys/types.h> 165#include <sys/types.h>
76#include <time.h> 166#include <time.h>
77 167
78#include <signal.h> 168#include <signal.h>
79 169
170#ifdef EV_H
171# include EV_H
172#else
173# include "ev.h"
174#endif
175
80#ifndef _WIN32 176#ifndef _WIN32
81# include <unistd.h>
82# include <sys/time.h> 177# include <sys/time.h>
83# include <sys/wait.h> 178# include <sys/wait.h>
179# include <unistd.h>
84#else 180#else
181# include <io.h>
85# define WIN32_LEAN_AND_MEAN 182# define WIN32_LEAN_AND_MEAN
86# include <windows.h> 183# include <windows.h>
87# ifndef EV_SELECT_IS_WINSOCKET 184# ifndef EV_SELECT_IS_WINSOCKET
88# define EV_SELECT_IS_WINSOCKET 1 185# define EV_SELECT_IS_WINSOCKET 1
89# endif 186# endif
90#endif 187#endif
91 188
92/**/ 189/* this block tries to deduce configuration from header-defined symbols and defaults */
190
191/* try to deduce the maximum number of signals on this platform */
192#if defined (EV_NSIG)
193/* use what's provided */
194#elif defined (NSIG)
195# define EV_NSIG (NSIG)
196#elif defined(_NSIG)
197# define EV_NSIG (_NSIG)
198#elif defined (SIGMAX)
199# define EV_NSIG (SIGMAX+1)
200#elif defined (SIG_MAX)
201# define EV_NSIG (SIG_MAX+1)
202#elif defined (_SIG_MAX)
203# define EV_NSIG (_SIG_MAX+1)
204#elif defined (MAXSIG)
205# define EV_NSIG (MAXSIG+1)
206#elif defined (MAX_SIG)
207# define EV_NSIG (MAX_SIG+1)
208#elif defined (SIGARRAYSIZE)
209# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */
210#elif defined (_sys_nsig)
211# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
212#else
213# error "unable to find value for NSIG, please report"
214/* to make it compile regardless, just remove the above line */
215# define EV_NSIG 64
216#endif
217
218/* Default to some arbitrary number that's big enough to get most
219 of the common signals.
220*/
221#ifndef NSIG
222# define NSIG 50
223#endif
224/* <-- NSIG logic from Configure */
225#ifndef EV_USE_CLOCK_SYSCALL
226# if __linux && __GLIBC__ >= 2
227# define EV_USE_CLOCK_SYSCALL 1
228# else
229# define EV_USE_CLOCK_SYSCALL 0
230# endif
231#endif
93 232
94#ifndef EV_USE_MONOTONIC 233#ifndef EV_USE_MONOTONIC
234# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
95# define EV_USE_MONOTONIC 1 235# define EV_USE_MONOTONIC 1
236# else
237# define EV_USE_MONOTONIC 0
238# endif
239#endif
240
241#ifndef EV_USE_REALTIME
242# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
243#endif
244
245#ifndef EV_USE_NANOSLEEP
246# if _POSIX_C_SOURCE >= 199309L
247# define EV_USE_NANOSLEEP 1
248# else
249# define EV_USE_NANOSLEEP 0
250# endif
96#endif 251#endif
97 252
98#ifndef EV_USE_SELECT 253#ifndef EV_USE_SELECT
99# define EV_USE_SELECT 1 254# define EV_USE_SELECT 1
100# define EV_SELECT_USE_FD_SET 1
101#endif 255#endif
102 256
103#ifndef EV_USE_POLL 257#ifndef EV_USE_POLL
104# ifdef _WIN32 258# ifdef _WIN32
105# define EV_USE_POLL 0 259# define EV_USE_POLL 0
… …
107# define EV_USE_POLL 1 261# define EV_USE_POLL 1
108# endif 262# endif
109#endif 263#endif
110 264
111#ifndef EV_USE_EPOLL 265#ifndef EV_USE_EPOLL
266# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
267# define EV_USE_EPOLL 1
268# else
112# define EV_USE_EPOLL 0 269# define EV_USE_EPOLL 0
270# endif
113#endif 271#endif
114 272
115#ifndef EV_USE_KQUEUE 273#ifndef EV_USE_KQUEUE
116# define EV_USE_KQUEUE 0 274# define EV_USE_KQUEUE 0
117#endif 275#endif
118 276
119#ifndef EV_USE_REALTIME 277#ifndef EV_USE_PORT
278# define EV_USE_PORT 0
279#endif
280
281#ifndef EV_USE_INOTIFY
282# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
120# define EV_USE_REALTIME 1 283# define EV_USE_INOTIFY 1
284# else
285# define EV_USE_INOTIFY 0
121#endif 286# endif
287#endif
122 288
123/**/ 289#ifndef EV_PID_HASHSIZE
124 290# if EV_MINIMAL
125/* darwin simply cannot be helped */ 291# define EV_PID_HASHSIZE 1
126#ifdef __APPLE__ 292# else
127# undef EV_USE_POLL 293# define EV_PID_HASHSIZE 16
128# undef EV_USE_KQUEUE
129#endif 294# endif
295#endif
296
297#ifndef EV_INOTIFY_HASHSIZE
298# if EV_MINIMAL
299# define EV_INOTIFY_HASHSIZE 1
300# else
301# define EV_INOTIFY_HASHSIZE 16
302# endif
303#endif
304
305#ifndef EV_USE_EVENTFD
306# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
307# define EV_USE_EVENTFD 1
308# else
309# define EV_USE_EVENTFD 0
310# endif
311#endif
312
313#ifndef EV_USE_SIGNALFD
314# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 9))
315# define EV_USE_SIGNALFD 1
316# else
317# define EV_USE_SIGNALFD 0
318# endif
319#endif
320
321#if 0 /* debugging */
322# define EV_VERIFY 3
323# define EV_USE_4HEAP 1
324# define EV_HEAP_CACHE_AT 1
325#endif
326
327#ifndef EV_VERIFY
328# define EV_VERIFY !EV_MINIMAL
329#endif
330
331#ifndef EV_USE_4HEAP
332# define EV_USE_4HEAP !EV_MINIMAL
333#endif
334
335#ifndef EV_HEAP_CACHE_AT
336# define EV_HEAP_CACHE_AT !EV_MINIMAL
337#endif
338
339/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
340/* which makes programs even slower. might work on other unices, too. */
341#if EV_USE_CLOCK_SYSCALL
342# include <syscall.h>
343# ifdef SYS_clock_gettime
344# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
345# undef EV_USE_MONOTONIC
346# define EV_USE_MONOTONIC 1
347# else
348# undef EV_USE_CLOCK_SYSCALL
349# define EV_USE_CLOCK_SYSCALL 0
350# endif
351#endif
352
353/* this block fixes any misconfiguration where we know we run into trouble otherwise */
130 354
131#ifndef CLOCK_MONOTONIC 355#ifndef CLOCK_MONOTONIC
132# undef EV_USE_MONOTONIC 356# undef EV_USE_MONOTONIC
133# define EV_USE_MONOTONIC 0 357# define EV_USE_MONOTONIC 0
134#endif 358#endif
… …
136#ifndef CLOCK_REALTIME 360#ifndef CLOCK_REALTIME
137# undef EV_USE_REALTIME 361# undef EV_USE_REALTIME
138# define EV_USE_REALTIME 0 362# define EV_USE_REALTIME 0
139#endif 363#endif
140 364
365#if !EV_STAT_ENABLE
366# undef EV_USE_INOTIFY
367# define EV_USE_INOTIFY 0
368#endif
369
370#if !EV_USE_NANOSLEEP
371# ifndef _WIN32
372# include <sys/select.h>
373# endif
374#endif
375
376#if EV_USE_INOTIFY
377# include <sys/utsname.h>
378# include <sys/statfs.h>
379# include <sys/inotify.h>
380/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
381# ifndef IN_DONT_FOLLOW
382# undef EV_USE_INOTIFY
383# define EV_USE_INOTIFY 0
384# endif
385#endif
386
141#if EV_SELECT_IS_WINSOCKET 387#if EV_SELECT_IS_WINSOCKET
142# include <winsock.h> 388# include <winsock.h>
143#endif 389#endif
144 390
391#if EV_USE_EVENTFD
392/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
393# include <stdint.h>
394# ifndef EFD_NONBLOCK
395# define EFD_NONBLOCK O_NONBLOCK
396# endif
397# ifndef EFD_CLOEXEC
398# define EFD_CLOEXEC O_CLOEXEC
399# endif
400# ifdef __cplusplus
401extern "C" {
402# endif
403int eventfd (unsigned int initval, int flags);
404# ifdef __cplusplus
405}
406# endif
407#endif
408
409#if EV_USE_SIGNALFD
410# include <sys/signalfd.h>
411#endif
412
145/**/ 413/**/
146 414
415#if EV_VERIFY >= 3
416# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
417#else
418# define EV_FREQUENT_CHECK do { } while (0)
419#endif
420
421/*
422 * This is used to avoid floating point rounding problems.
423 * It is added to ev_rt_now when scheduling periodics
424 * to ensure progress, time-wise, even when rounding
425 * errors are against us.
426 * This value is good at least till the year 4000.
427 * Better solutions welcome.
428 */
429#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
430
147#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 431#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
148#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 432#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
149#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
150/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ 433/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
151 434
152#ifdef EV_H
153# include EV_H
154#else
155# include "ev.h"
156#endif
157
158#if __GNUC__ >= 3 435#if __GNUC__ >= 4
159# define expect(expr,value) __builtin_expect ((expr),(value)) 436# define expect(expr,value) __builtin_expect ((expr),(value))
160# define inline inline 437# define noinline __attribute__ ((noinline))
161#else 438#else
162# define expect(expr,value) (expr) 439# define expect(expr,value) (expr)
163# define inline static 440# define noinline
441# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
442# define inline
443# endif
164#endif 444#endif
165 445
166#define expect_false(expr) expect ((expr) != 0, 0) 446#define expect_false(expr) expect ((expr) != 0, 0)
167#define expect_true(expr) expect ((expr) != 0, 1) 447#define expect_true(expr) expect ((expr) != 0, 1)
448#define inline_size static inline
168 449
450#if EV_MINIMAL
451# define inline_speed static noinline
452#else
453# define inline_speed static inline
454#endif
455
169#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 456#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
457
458#if EV_MINPRI == EV_MAXPRI
459# define ABSPRI(w) (((W)w), 0)
460#else
170#define ABSPRI(w) ((w)->priority - EV_MINPRI) 461# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
462#endif
171 463
172#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ 464#define EMPTY /* required for microsofts broken pseudo-c compiler */
173#define EMPTY2(a,b) /* used to suppress some warnings */ 465#define EMPTY2(a,b) /* used to suppress some warnings */
174 466
175typedef struct ev_watcher *W; 467typedef ev_watcher *W;
176typedef struct ev_watcher_list *WL; 468typedef ev_watcher_list *WL;
177typedef struct ev_watcher_time *WT; 469typedef ev_watcher_time *WT;
178 470
471#define ev_active(w) ((W)(w))->active
472#define ev_at(w) ((WT)(w))->at
473
474#if EV_USE_REALTIME
475/* sig_atomic_t is used to avoid per-thread variables or locking but still */
476/* giving it a reasonably high chance of working on typical architetcures */
477static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
478#endif
479
480#if EV_USE_MONOTONIC
179static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 481static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
482#endif
180 483
181#ifdef _WIN32 484#ifdef _WIN32
182# include "ev_win32.c" 485# include "ev_win32.c"
183#endif 486#endif
184 487
185/*****************************************************************************/ 488/*****************************************************************************/
186 489
187static void (*syserr_cb)(const char *msg); 490static void (*syserr_cb)(const char *msg);
188 491
492void
189void ev_set_syserr_cb (void (*cb)(const char *msg)) 493ev_set_syserr_cb (void (*cb)(const char *msg))
190{ 494{
191 syserr_cb = cb; 495 syserr_cb = cb;
192} 496}
193 497
194static void 498static void noinline
195syserr (const char *msg) 499ev_syserr (const char *msg)
196{ 500{
197 if (!msg) 501 if (!msg)
198 msg = "(libev) system error"; 502 msg = "(libev) system error";
199 503
200 if (syserr_cb) 504 if (syserr_cb)
… …
204 perror (msg); 508 perror (msg);
205 abort (); 509 abort ();
206 } 510 }
207} 511}
208 512
513static void *
514ev_realloc_emul (void *ptr, long size)
515{
516 /* some systems, notably openbsd and darwin, fail to properly
517 * implement realloc (x, 0) (as required by both ansi c-98 and
518 * the single unix specification, so work around them here.
519 */
520
521 if (size)
522 return realloc (ptr, size);
523
524 free (ptr);
525 return 0;
526}
527
209static void *(*alloc)(void *ptr, long size); 528static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
210 529
530void
211void ev_set_allocator (void *(*cb)(void *ptr, long size)) 531ev_set_allocator (void *(*cb)(void *ptr, long size))
212{ 532{
213 alloc = cb; 533 alloc = cb;
214} 534}
215 535
216static void * 536inline_speed void *
217ev_realloc (void *ptr, long size) 537ev_realloc (void *ptr, long size)
218{ 538{
219 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 539 ptr = alloc (ptr, size);
220 540
221 if (!ptr && size) 541 if (!ptr && size)
222 { 542 {
223 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 543 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
224 abort (); 544 abort ();
… …
230#define ev_malloc(size) ev_realloc (0, (size)) 550#define ev_malloc(size) ev_realloc (0, (size))
231#define ev_free(ptr) ev_realloc ((ptr), 0) 551#define ev_free(ptr) ev_realloc ((ptr), 0)
232 552
233/*****************************************************************************/ 553/*****************************************************************************/
234 554
555/* set in reify when reification needed */
556#define EV_ANFD_REIFY 1
557
558/* file descriptor info structure */
235typedef struct 559typedef struct
236{ 560{
237 WL head; 561 WL head;
238 unsigned char events; 562 unsigned char events; /* the events watched for */
563 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
564 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
239 unsigned char reify; 565 unsigned char unused;
566#if EV_USE_EPOLL
567 unsigned int egen; /* generation counter to counter epoll bugs */
568#endif
240#if EV_SELECT_IS_WINSOCKET 569#if EV_SELECT_IS_WINSOCKET
241 SOCKET handle; 570 SOCKET handle;
242#endif 571#endif
243} ANFD; 572} ANFD;
244 573
574/* stores the pending event set for a given watcher */
245typedef struct 575typedef struct
246{ 576{
247 W w; 577 W w;
248 int events; 578 int events; /* the pending event set for the given watcher */
249} ANPENDING; 579} ANPENDING;
580
581#if EV_USE_INOTIFY
582/* hash table entry per inotify-id */
583typedef struct
584{
585 WL head;
586} ANFS;
587#endif
588
589/* Heap Entry */
590#if EV_HEAP_CACHE_AT
591 /* a heap element */
592 typedef struct {
593 ev_tstamp at;
594 WT w;
595 } ANHE;
596
597 #define ANHE_w(he) (he).w /* access watcher, read-write */
598 #define ANHE_at(he) (he).at /* access cached at, read-only */
599 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
600#else
601 /* a heap element */
602 typedef WT ANHE;
603
604 #define ANHE_w(he) (he)
605 #define ANHE_at(he) (he)->at
606 #define ANHE_at_cache(he)
607#endif
250 608
251#if EV_MULTIPLICITY 609#if EV_MULTIPLICITY
252 610
253 struct ev_loop 611 struct ev_loop
254 { 612 {
… …
258 #include "ev_vars.h" 616 #include "ev_vars.h"
259 #undef VAR 617 #undef VAR
260 }; 618 };
261 #include "ev_wrap.h" 619 #include "ev_wrap.h"
262 620
263 struct ev_loop default_loop_struct; 621 static struct ev_loop default_loop_struct;
264 static struct ev_loop *default_loop; 622 struct ev_loop *ev_default_loop_ptr;
265 623
266#else 624#else
267 625
268 ev_tstamp ev_rt_now; 626 ev_tstamp ev_rt_now;
269 #define VAR(name,decl) static decl; 627 #define VAR(name,decl) static decl;
270 #include "ev_vars.h" 628 #include "ev_vars.h"
271 #undef VAR 629 #undef VAR
272 630
273 static int default_loop; 631 static int ev_default_loop_ptr;
274 632
275#endif 633#endif
634
635#if EV_MINIMAL < 2
636# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
637# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
638# define EV_INVOKE_PENDING invoke_cb (EV_A)
639#else
640# define EV_RELEASE_CB (void)0
641# define EV_ACQUIRE_CB (void)0
642# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
643#endif
644
645#define EVUNLOOP_RECURSE 0x80
276 646
277/*****************************************************************************/ 647/*****************************************************************************/
278 648
649#ifndef EV_HAVE_EV_TIME
279ev_tstamp 650ev_tstamp
280ev_time (void) 651ev_time (void)
281{ 652{
282#if EV_USE_REALTIME 653#if EV_USE_REALTIME
654 if (expect_true (have_realtime))
655 {
283 struct timespec ts; 656 struct timespec ts;
284 clock_gettime (CLOCK_REALTIME, &ts); 657 clock_gettime (CLOCK_REALTIME, &ts);
285 return ts.tv_sec + ts.tv_nsec * 1e-9; 658 return ts.tv_sec + ts.tv_nsec * 1e-9;
286#else 659 }
660#endif
661
287 struct timeval tv; 662 struct timeval tv;
288 gettimeofday (&tv, 0); 663 gettimeofday (&tv, 0);
289 return tv.tv_sec + tv.tv_usec * 1e-6; 664 return tv.tv_sec + tv.tv_usec * 1e-6;
290#endif
291} 665}
666#endif
292 667
293inline ev_tstamp 668inline_size ev_tstamp
294get_clock (void) 669get_clock (void)
295{ 670{
296#if EV_USE_MONOTONIC 671#if EV_USE_MONOTONIC
297 if (expect_true (have_monotonic)) 672 if (expect_true (have_monotonic))
298 { 673 {
… …
311{ 686{
312 return ev_rt_now; 687 return ev_rt_now;
313} 688}
314#endif 689#endif
315 690
316#define array_roundsize(type,n) (((n) | 4) & ~3) 691void
692ev_sleep (ev_tstamp delay)
693{
694 if (delay > 0.)
695 {
696#if EV_USE_NANOSLEEP
697 struct timespec ts;
698
699 ts.tv_sec = (time_t)delay;
700 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
701
702 nanosleep (&ts, 0);
703#elif defined(_WIN32)
704 Sleep ((unsigned long)(delay * 1e3));
705#else
706 struct timeval tv;
707
708 tv.tv_sec = (time_t)delay;
709 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
710
711 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
712 /* something not guaranteed by newer posix versions, but guaranteed */
713 /* by older ones */
714 select (0, 0, 0, 0, &tv);
715#endif
716 }
717}
718
719/*****************************************************************************/
720
721#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
722
723/* find a suitable new size for the given array, */
724/* hopefully by rounding to a ncie-to-malloc size */
725inline_size int
726array_nextsize (int elem, int cur, int cnt)
727{
728 int ncur = cur + 1;
729
730 do
731 ncur <<= 1;
732 while (cnt > ncur);
733
734 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
735 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
736 {
737 ncur *= elem;
738 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
739 ncur = ncur - sizeof (void *) * 4;
740 ncur /= elem;
741 }
742
743 return ncur;
744}
745
746static noinline void *
747array_realloc (int elem, void *base, int *cur, int cnt)
748{
749 *cur = array_nextsize (elem, *cur, cnt);
750 return ev_realloc (base, elem * *cur);
751}
752
753#define array_init_zero(base,count) \
754 memset ((void *)(base), 0, sizeof (*(base)) * (count))
317 755
318#define array_needsize(type,base,cur,cnt,init) \ 756#define array_needsize(type,base,cur,cnt,init) \
319 if (expect_false ((cnt) > cur)) \ 757 if (expect_false ((cnt) > (cur))) \
320 { \ 758 { \
321 int newcnt = cur; \ 759 int ocur_ = (cur); \
322 do \ 760 (base) = (type *)array_realloc \
323 { \ 761 (sizeof (type), (base), &(cur), (cnt)); \
324 newcnt = array_roundsize (type, newcnt << 1); \ 762 init ((base) + (ocur_), (cur) - ocur_); \
325 } \
326 while ((cnt) > newcnt); \
327 \
328 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
329 init (base + cur, newcnt - cur); \
330 cur = newcnt; \
331 } 763 }
332 764
765#if 0
333#define array_slim(type,stem) \ 766#define array_slim(type,stem) \
334 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 767 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
335 { \ 768 { \
336 stem ## max = array_roundsize (stem ## cnt >> 1); \ 769 stem ## max = array_roundsize (stem ## cnt >> 1); \
337 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 770 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
338 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 771 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
339 } 772 }
773#endif
340 774
341#define array_free(stem, idx) \ 775#define array_free(stem, idx) \
342 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 776 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
343 777
344/*****************************************************************************/ 778/*****************************************************************************/
345 779
346static void 780/* dummy callback for pending events */
347anfds_init (ANFD *base, int count) 781static void noinline
782pendingcb (EV_P_ ev_prepare *w, int revents)
348{ 783{
349 while (count--)
350 {
351 base->head = 0;
352 base->events = EV_NONE;
353 base->reify = 0;
354
355 ++base;
356 }
357} 784}
358 785
359void 786void noinline
360ev_feed_event (EV_P_ void *w, int revents) 787ev_feed_event (EV_P_ void *w, int revents)
361{ 788{
362 W w_ = (W)w; 789 W w_ = (W)w;
790 int pri = ABSPRI (w_);
363 791
364 if (w_->pending) 792 if (expect_false (w_->pending))
793 pendings [pri][w_->pending - 1].events |= revents;
794 else
365 { 795 {
796 w_->pending = ++pendingcnt [pri];
797 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
798 pendings [pri][w_->pending - 1].w = w_;
366 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 799 pendings [pri][w_->pending - 1].events = revents;
367 return;
368 } 800 }
369
370 w_->pending = ++pendingcnt [ABSPRI (w_)];
371 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
372 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
373 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
374} 801}
375 802
376static void 803inline_speed void
804feed_reverse (EV_P_ W w)
805{
806 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
807 rfeeds [rfeedcnt++] = w;
808}
809
810inline_size void
811feed_reverse_done (EV_P_ int revents)
812{
813 do
814 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
815 while (rfeedcnt);
816}
817
818inline_speed void
377queue_events (EV_P_ W *events, int eventcnt, int type) 819queue_events (EV_P_ W *events, int eventcnt, int type)
378{ 820{
379 int i; 821 int i;
380 822
381 for (i = 0; i < eventcnt; ++i) 823 for (i = 0; i < eventcnt; ++i)
382 ev_feed_event (EV_A_ events [i], type); 824 ev_feed_event (EV_A_ events [i], type);
383} 825}
384 826
827/*****************************************************************************/
828
385inline void 829inline_speed void
386fd_event (EV_P_ int fd, int revents) 830fd_event_nc (EV_P_ int fd, int revents)
387{ 831{
388 ANFD *anfd = anfds + fd; 832 ANFD *anfd = anfds + fd;
389 struct ev_io *w; 833 ev_io *w;
390 834
391 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 835 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
392 { 836 {
393 int ev = w->events & revents; 837 int ev = w->events & revents;
394 838
395 if (ev) 839 if (ev)
396 ev_feed_event (EV_A_ (W)w, ev); 840 ev_feed_event (EV_A_ (W)w, ev);
397 } 841 }
398} 842}
399 843
844/* do not submit kernel events for fds that have reify set */
845/* because that means they changed while we were polling for new events */
846inline_speed void
847fd_event (EV_P_ int fd, int revents)
848{
849 ANFD *anfd = anfds + fd;
850
851 if (expect_true (!anfd->reify))
852 fd_event_nc (EV_A_ fd, revents);
853}
854
400void 855void
401ev_feed_fd_event (EV_P_ int fd, int revents) 856ev_feed_fd_event (EV_P_ int fd, int revents)
402{ 857{
858 if (fd >= 0 && fd < anfdmax)
403 fd_event (EV_A_ fd, revents); 859 fd_event_nc (EV_A_ fd, revents);
404} 860}
405 861
406/*****************************************************************************/ 862/* make sure the external fd watch events are in-sync */
407 863/* with the kernel/libev internal state */
408static void 864inline_size void
409fd_reify (EV_P) 865fd_reify (EV_P)
410{ 866{
411 int i; 867 int i;
412 868
413 for (i = 0; i < fdchangecnt; ++i) 869 for (i = 0; i < fdchangecnt; ++i)
414 { 870 {
415 int fd = fdchanges [i]; 871 int fd = fdchanges [i];
416 ANFD *anfd = anfds + fd; 872 ANFD *anfd = anfds + fd;
417 struct ev_io *w; 873 ev_io *w;
418 874
419 int events = 0; 875 unsigned char events = 0;
420 876
421 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 877 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
422 events |= w->events; 878 events |= (unsigned char)w->events;
423 879
424#if EV_SELECT_IS_WINSOCKET 880#if EV_SELECT_IS_WINSOCKET
425 if (events) 881 if (events)
426 { 882 {
427 unsigned long argp; 883 unsigned long arg;
884 #ifdef EV_FD_TO_WIN32_HANDLE
885 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
886 #else
428 anfd->handle = _get_osfhandle (fd); 887 anfd->handle = _get_osfhandle (fd);
888 #endif
429 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 889 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
430 } 890 }
431#endif 891#endif
432 892
893 {
894 unsigned char o_events = anfd->events;
895 unsigned char o_reify = anfd->reify;
896
433 anfd->reify = 0; 897 anfd->reify = 0;
434
435 method_modify (EV_A_ fd, anfd->events, events);
436 anfd->events = events; 898 anfd->events = events;
899
900 if (o_events != events || o_reify & EV__IOFDSET)
901 backend_modify (EV_A_ fd, o_events, events);
902 }
437 } 903 }
438 904
439 fdchangecnt = 0; 905 fdchangecnt = 0;
440} 906}
441 907
442static void 908/* something about the given fd changed */
909inline_size void
443fd_change (EV_P_ int fd) 910fd_change (EV_P_ int fd, int flags)
444{ 911{
445 if (anfds [fd].reify) 912 unsigned char reify = anfds [fd].reify;
446 return;
447
448 anfds [fd].reify = 1; 913 anfds [fd].reify |= flags;
449 914
915 if (expect_true (!reify))
916 {
450 ++fdchangecnt; 917 ++fdchangecnt;
451 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 918 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
452 fdchanges [fdchangecnt - 1] = fd; 919 fdchanges [fdchangecnt - 1] = fd;
920 }
453} 921}
454 922
455static void 923/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
924inline_speed void
456fd_kill (EV_P_ int fd) 925fd_kill (EV_P_ int fd)
457{ 926{
458 struct ev_io *w; 927 ev_io *w;
459 928
460 while ((w = (struct ev_io *)anfds [fd].head)) 929 while ((w = (ev_io *)anfds [fd].head))
461 { 930 {
462 ev_io_stop (EV_A_ w); 931 ev_io_stop (EV_A_ w);
463 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 932 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
464 } 933 }
465} 934}
466 935
467static int 936/* check whether the given fd is atcually valid, for error recovery */
937inline_size int
468fd_valid (int fd) 938fd_valid (int fd)
469{ 939{
470#ifdef _WIN32 940#ifdef _WIN32
471 return _get_osfhandle (fd) != -1; 941 return _get_osfhandle (fd) != -1;
472#else 942#else
473 return fcntl (fd, F_GETFD) != -1; 943 return fcntl (fd, F_GETFD) != -1;
474#endif 944#endif
475} 945}
476 946
477/* called on EBADF to verify fds */ 947/* called on EBADF to verify fds */
478static void 948static void noinline
479fd_ebadf (EV_P) 949fd_ebadf (EV_P)
480{ 950{
481 int fd; 951 int fd;
482 952
483 for (fd = 0; fd < anfdmax; ++fd) 953 for (fd = 0; fd < anfdmax; ++fd)
484 if (anfds [fd].events) 954 if (anfds [fd].events)
485 if (!fd_valid (fd) == -1 && errno == EBADF) 955 if (!fd_valid (fd) && errno == EBADF)
486 fd_kill (EV_A_ fd); 956 fd_kill (EV_A_ fd);
487} 957}
488 958
489/* called on ENOMEM in select/poll to kill some fds and retry */ 959/* called on ENOMEM in select/poll to kill some fds and retry */
490static void 960static void noinline
491fd_enomem (EV_P) 961fd_enomem (EV_P)
492{ 962{
493 int fd; 963 int fd;
494 964
495 for (fd = anfdmax; fd--; ) 965 for (fd = anfdmax; fd--; )
… …
498 fd_kill (EV_A_ fd); 968 fd_kill (EV_A_ fd);
499 return; 969 return;
500 } 970 }
501} 971}
502 972
503/* usually called after fork if method needs to re-arm all fds from scratch */ 973/* usually called after fork if backend needs to re-arm all fds from scratch */
504static void 974static void noinline
505fd_rearm_all (EV_P) 975fd_rearm_all (EV_P)
506{ 976{
507 int fd; 977 int fd;
508 978
509 /* this should be highly optimised to not do anything but set a flag */
510 for (fd = 0; fd < anfdmax; ++fd) 979 for (fd = 0; fd < anfdmax; ++fd)
511 if (anfds [fd].events) 980 if (anfds [fd].events)
512 { 981 {
513 anfds [fd].events = 0; 982 anfds [fd].events = 0;
514 fd_change (EV_A_ fd); 983 anfds [fd].emask = 0;
984 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
515 } 985 }
516} 986}
517 987
518/*****************************************************************************/ 988/*****************************************************************************/
519 989
520static void 990/*
521upheap (WT *heap, int k) 991 * the heap functions want a real array index. array index 0 uis guaranteed to not
522{ 992 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
523 WT w = heap [k]; 993 * the branching factor of the d-tree.
994 */
524 995
525 while (k && heap [k >> 1]->at > w->at) 996/*
526 { 997 * at the moment we allow libev the luxury of two heaps,
527 heap [k] = heap [k >> 1]; 998 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
528 ((W)heap [k])->active = k + 1; 999 * which is more cache-efficient.
529 k >>= 1; 1000 * the difference is about 5% with 50000+ watchers.
530 } 1001 */
1002#if EV_USE_4HEAP
531 1003
532 heap [k] = w; 1004#define DHEAP 4
533 ((W)heap [k])->active = k + 1; 1005#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1006#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1007#define UPHEAP_DONE(p,k) ((p) == (k))
534 1008
535} 1009/* away from the root */
536 1010inline_speed void
537static void
538downheap (WT *heap, int N, int k) 1011downheap (ANHE *heap, int N, int k)
539{ 1012{
540 WT w = heap [k]; 1013 ANHE he = heap [k];
1014 ANHE *E = heap + N + HEAP0;
541 1015
542 while (k < (N >> 1)) 1016 for (;;)
543 { 1017 {
544 int j = k << 1; 1018 ev_tstamp minat;
1019 ANHE *minpos;
1020 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
545 1021
546 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 1022 /* find minimum child */
1023 if (expect_true (pos + DHEAP - 1 < E))
547 ++j; 1024 {
548 1025 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
549 if (w->at <= heap [j]->at) 1026 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1027 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1028 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1029 }
1030 else if (pos < E)
1031 {
1032 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1033 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1034 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1035 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1036 }
1037 else
550 break; 1038 break;
551 1039
1040 if (ANHE_at (he) <= minat)
1041 break;
1042
1043 heap [k] = *minpos;
1044 ev_active (ANHE_w (*minpos)) = k;
1045
1046 k = minpos - heap;
1047 }
1048
1049 heap [k] = he;
1050 ev_active (ANHE_w (he)) = k;
1051}
1052
1053#else /* 4HEAP */
1054
1055#define HEAP0 1
1056#define HPARENT(k) ((k) >> 1)
1057#define UPHEAP_DONE(p,k) (!(p))
1058
1059/* away from the root */
1060inline_speed void
1061downheap (ANHE *heap, int N, int k)
1062{
1063 ANHE he = heap [k];
1064
1065 for (;;)
1066 {
1067 int c = k << 1;
1068
1069 if (c > N + HEAP0 - 1)
1070 break;
1071
1072 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1073 ? 1 : 0;
1074
1075 if (ANHE_at (he) <= ANHE_at (heap [c]))
1076 break;
1077
552 heap [k] = heap [j]; 1078 heap [k] = heap [c];
553 ((W)heap [k])->active = k + 1; 1079 ev_active (ANHE_w (heap [k])) = k;
1080
554 k = j; 1081 k = c;
555 } 1082 }
556 1083
557 heap [k] = w; 1084 heap [k] = he;
558 ((W)heap [k])->active = k + 1; 1085 ev_active (ANHE_w (he)) = k;
559} 1086}
1087#endif
560 1088
1089/* towards the root */
1090inline_speed void
1091upheap (ANHE *heap, int k)
1092{
1093 ANHE he = heap [k];
1094
1095 for (;;)
1096 {
1097 int p = HPARENT (k);
1098
1099 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1100 break;
1101
1102 heap [k] = heap [p];
1103 ev_active (ANHE_w (heap [k])) = k;
1104 k = p;
1105 }
1106
1107 heap [k] = he;
1108 ev_active (ANHE_w (he)) = k;
1109}
1110
1111/* move an element suitably so it is in a correct place */
561inline void 1112inline_size void
562adjustheap (WT *heap, int N, int k) 1113adjustheap (ANHE *heap, int N, int k)
563{ 1114{
1115 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
564 upheap (heap, k); 1116 upheap (heap, k);
1117 else
565 downheap (heap, N, k); 1118 downheap (heap, N, k);
1119}
1120
1121/* rebuild the heap: this function is used only once and executed rarely */
1122inline_size void
1123reheap (ANHE *heap, int N)
1124{
1125 int i;
1126
1127 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1128 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1129 for (i = 0; i < N; ++i)
1130 upheap (heap, i + HEAP0);
566} 1131}
567 1132
568/*****************************************************************************/ 1133/*****************************************************************************/
569 1134
1135/* associate signal watchers to a signal signal */
570typedef struct 1136typedef struct
571{ 1137{
572 WL head; 1138 WL head;
573 sig_atomic_t volatile gotsig; 1139 EV_ATOMIC_T gotsig;
574} ANSIG; 1140} ANSIG;
575 1141
576static ANSIG *signals; 1142static ANSIG *signals;
577static int signalmax; 1143static int signalmax;
578 1144
579static int sigpipe [2]; 1145static EV_ATOMIC_T gotsig;
580static sig_atomic_t volatile gotsig;
581static struct ev_io sigev;
582 1146
583static void 1147/*****************************************************************************/
584signals_init (ANSIG *base, int count)
585{
586 while (count--)
587 {
588 base->head = 0;
589 base->gotsig = 0;
590 1148
591 ++base; 1149/* used to prepare libev internal fd's */
592 } 1150/* this is not fork-safe */
593}
594
595static void
596sighandler (int signum)
597{
598#if _WIN32
599 signal (signum, sighandler);
600#endif
601
602 signals [signum - 1].gotsig = 1;
603
604 if (!gotsig)
605 {
606 int old_errno = errno;
607 gotsig = 1;
608 write (sigpipe [1], &signum, 1);
609 errno = old_errno;
610 }
611}
612
613void
614ev_feed_signal_event (EV_P_ int signum)
615{
616 WL w;
617
618#if EV_MULTIPLICITY
619 assert (("feeding signal events is only supported in the default loop", loop == default_loop));
620#endif
621
622 --signum;
623
624 if (signum < 0 || signum >= signalmax)
625 return;
626
627 signals [signum].gotsig = 0;
628
629 for (w = signals [signum].head; w; w = w->next)
630 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
631}
632
633static void
634sigcb (EV_P_ struct ev_io *iow, int revents)
635{
636 int signum;
637
638 read (sigpipe [0], &revents, 1);
639 gotsig = 0;
640
641 for (signum = signalmax; signum--; )
642 if (signals [signum].gotsig)
643 ev_feed_signal_event (EV_A_ signum + 1);
644}
645
646inline void 1151inline_speed void
647fd_intern (int fd) 1152fd_intern (int fd)
648{ 1153{
649#ifdef _WIN32 1154#ifdef _WIN32
650 int arg = 1; 1155 unsigned long arg = 1;
651 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1156 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
652#else 1157#else
653 fcntl (fd, F_SETFD, FD_CLOEXEC); 1158 fcntl (fd, F_SETFD, FD_CLOEXEC);
654 fcntl (fd, F_SETFL, O_NONBLOCK); 1159 fcntl (fd, F_SETFL, O_NONBLOCK);
655#endif 1160#endif
656} 1161}
657 1162
1163static void noinline
1164evpipe_init (EV_P)
1165{
1166 if (!ev_is_active (&pipe_w))
1167 {
1168#if EV_USE_EVENTFD
1169 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1170 if (evfd < 0 && errno == EINVAL)
1171 evfd = eventfd (0, 0);
1172
1173 if (evfd >= 0)
1174 {
1175 evpipe [0] = -1;
1176 fd_intern (evfd); /* doing it twice doesn't hurt */
1177 ev_io_set (&pipe_w, evfd, EV_READ);
1178 }
1179 else
1180#endif
1181 {
1182 while (pipe (evpipe))
1183 ev_syserr ("(libev) error creating signal/async pipe");
1184
1185 fd_intern (evpipe [0]);
1186 fd_intern (evpipe [1]);
1187 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1188 }
1189
1190 ev_io_start (EV_A_ &pipe_w);
1191 ev_unref (EV_A); /* watcher should not keep loop alive */
1192 }
1193}
1194
1195inline_size void
1196evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1197{
1198 if (!*flag)
1199 {
1200 int old_errno = errno; /* save errno because write might clobber it */
1201
1202 *flag = 1;
1203
1204#if EV_USE_EVENTFD
1205 if (evfd >= 0)
1206 {
1207 uint64_t counter = 1;
1208 write (evfd, &counter, sizeof (uint64_t));
1209 }
1210 else
1211#endif
1212 write (evpipe [1], &old_errno, 1);
1213
1214 errno = old_errno;
1215 }
1216}
1217
1218/* called whenever the libev signal pipe */
1219/* got some events (signal, async) */
658static void 1220static void
659siginit (EV_P) 1221pipecb (EV_P_ ev_io *iow, int revents)
660{ 1222{
661 fd_intern (sigpipe [0]); 1223#if EV_USE_EVENTFD
662 fd_intern (sigpipe [1]); 1224 if (evfd >= 0)
1225 {
1226 uint64_t counter;
1227 read (evfd, &counter, sizeof (uint64_t));
1228 }
1229 else
1230#endif
1231 {
1232 char dummy;
1233 read (evpipe [0], &dummy, 1);
1234 }
663 1235
664 ev_io_set (&sigev, sigpipe [0], EV_READ); 1236 if (gotsig && ev_is_default_loop (EV_A))
665 ev_io_start (EV_A_ &sigev); 1237 {
666 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1238 int signum;
1239 gotsig = 0;
1240
1241 for (signum = signalmax; signum--; )
1242 if (signals [signum].gotsig)
1243 ev_feed_signal_event (EV_A_ signum + 1);
1244 }
1245
1246#if EV_ASYNC_ENABLE
1247 if (gotasync)
1248 {
1249 int i;
1250 gotasync = 0;
1251
1252 for (i = asynccnt; i--; )
1253 if (asyncs [i]->sent)
1254 {
1255 asyncs [i]->sent = 0;
1256 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1257 }
1258 }
1259#endif
667} 1260}
668 1261
669/*****************************************************************************/ 1262/*****************************************************************************/
670 1263
671static struct ev_child *childs [PID_HASHSIZE]; 1264static void
1265ev_sighandler (int signum)
1266{
1267#if EV_MULTIPLICITY
1268 struct ev_loop *loop = &default_loop_struct;
1269#endif
1270
1271#if _WIN32
1272 signal (signum, ev_sighandler);
1273#endif
1274
1275 signals [signum - 1].gotsig = 1;
1276 evpipe_write (EV_A_ &gotsig);
1277}
1278
1279void noinline
1280ev_feed_signal_event (EV_P_ int signum)
1281{
1282 WL w;
1283
1284#if EV_MULTIPLICITY
1285 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1286#endif
1287
1288 --signum;
1289
1290 if (signum < 0 || signum >= signalmax)
1291 return;
1292
1293 signals [signum].gotsig = 0;
1294
1295 for (w = signals [signum].head; w; w = w->next)
1296 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1297}
1298
1299#if EV_USE_SIGNALFD
1300static void
1301sigfdcb (EV_P_ ev_io *iow, int revents)
1302{
1303 struct signalfd_siginfo si[4], *sip;
1304
1305 for (;;)
1306 {
1307 ssize_t res = read (sigfd, si, sizeof (si));
1308
1309 /* not ISO-C, as res might be -1, but works with SuS */
1310 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1311 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1312
1313 if (res < (ssize_t)sizeof (si))
1314 break;
1315 }
1316}
1317#endif
1318
1319/*****************************************************************************/
1320
1321static WL childs [EV_PID_HASHSIZE];
672 1322
673#ifndef _WIN32 1323#ifndef _WIN32
674 1324
675static struct ev_signal childev; 1325static ev_signal childev;
1326
1327#ifndef WIFCONTINUED
1328# define WIFCONTINUED(status) 0
1329#endif
1330
1331/* handle a single child status event */
1332inline_speed void
1333child_reap (EV_P_ int chain, int pid, int status)
1334{
1335 ev_child *w;
1336 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1337
1338 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1339 {
1340 if ((w->pid == pid || !w->pid)
1341 && (!traced || (w->flags & 1)))
1342 {
1343 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1344 w->rpid = pid;
1345 w->rstatus = status;
1346 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1347 }
1348 }
1349}
676 1350
677#ifndef WCONTINUED 1351#ifndef WCONTINUED
678# define WCONTINUED 0 1352# define WCONTINUED 0
679#endif 1353#endif
680 1354
1355/* called on sigchld etc., calls waitpid */
681static void 1356static void
682child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
683{
684 struct ev_child *w;
685
686 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
687 if (w->pid == pid || !w->pid)
688 {
689 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
690 w->rpid = pid;
691 w->rstatus = status;
692 ev_feed_event (EV_A_ (W)w, EV_CHILD);
693 }
694}
695
696static void
697childcb (EV_P_ struct ev_signal *sw, int revents) 1357childcb (EV_P_ ev_signal *sw, int revents)
698{ 1358{
699 int pid, status; 1359 int pid, status;
700 1360
1361 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
701 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1362 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
702 { 1363 if (!WCONTINUED
1364 || errno != EINVAL
1365 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1366 return;
1367
703 /* make sure we are called again until all childs have been reaped */ 1368 /* make sure we are called again until all children have been reaped */
1369 /* we need to do it this way so that the callback gets called before we continue */
704 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1370 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
705 1371
706 child_reap (EV_A_ sw, pid, pid, status); 1372 child_reap (EV_A_ pid, pid, status);
1373 if (EV_PID_HASHSIZE > 1)
707 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1374 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
708 }
709} 1375}
710 1376
711#endif 1377#endif
712 1378
713/*****************************************************************************/ 1379/*****************************************************************************/
714 1380
1381#if EV_USE_PORT
1382# include "ev_port.c"
1383#endif
715#if EV_USE_KQUEUE 1384#if EV_USE_KQUEUE
716# include "ev_kqueue.c" 1385# include "ev_kqueue.c"
717#endif 1386#endif
718#if EV_USE_EPOLL 1387#if EV_USE_EPOLL
719# include "ev_epoll.c" 1388# include "ev_epoll.c"
… …
736{ 1405{
737 return EV_VERSION_MINOR; 1406 return EV_VERSION_MINOR;
738} 1407}
739 1408
740/* return true if we are running with elevated privileges and should ignore env variables */ 1409/* return true if we are running with elevated privileges and should ignore env variables */
741static int 1410int inline_size
742enable_secure (void) 1411enable_secure (void)
743{ 1412{
744#ifdef _WIN32 1413#ifdef _WIN32
745 return 0; 1414 return 0;
746#else 1415#else
… …
748 || getgid () != getegid (); 1417 || getgid () != getegid ();
749#endif 1418#endif
750} 1419}
751 1420
752unsigned int 1421unsigned int
753ev_method (EV_P) 1422ev_supported_backends (void)
754{ 1423{
755 return method; 1424 unsigned int flags = 0;
756}
757 1425
758static void 1426 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1427 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1428 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1429 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1430 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1431
1432 return flags;
1433}
1434
1435unsigned int
1436ev_recommended_backends (void)
1437{
1438 unsigned int flags = ev_supported_backends ();
1439
1440#ifndef __NetBSD__
1441 /* kqueue is borked on everything but netbsd apparently */
1442 /* it usually doesn't work correctly on anything but sockets and pipes */
1443 flags &= ~EVBACKEND_KQUEUE;
1444#endif
1445#ifdef __APPLE__
1446 /* only select works correctly on that "unix-certified" platform */
1447 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1448 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1449#endif
1450
1451 return flags;
1452}
1453
1454unsigned int
1455ev_embeddable_backends (void)
1456{
1457 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1458
1459 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1460 /* please fix it and tell me how to detect the fix */
1461 flags &= ~EVBACKEND_EPOLL;
1462
1463 return flags;
1464}
1465
1466unsigned int
1467ev_backend (EV_P)
1468{
1469 return backend;
1470}
1471
1472#if EV_MINIMAL < 2
1473unsigned int
1474ev_loop_count (EV_P)
1475{
1476 return loop_count;
1477}
1478
1479unsigned int
1480ev_loop_depth (EV_P)
1481{
1482 return loop_depth;
1483}
1484
1485void
1486ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1487{
1488 io_blocktime = interval;
1489}
1490
1491void
1492ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1493{
1494 timeout_blocktime = interval;
1495}
1496
1497void
1498ev_set_userdata (EV_P_ void *data)
1499{
1500 userdata = data;
1501}
1502
1503void *
1504ev_userdata (EV_P)
1505{
1506 return userdata;
1507}
1508
1509void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1510{
1511 invoke_cb = invoke_pending_cb;
1512}
1513
1514void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1515{
1516 release_cb = release;
1517 acquire_cb = acquire;
1518}
1519#endif
1520
1521/* initialise a loop structure, must be zero-initialised */
1522static void noinline
759loop_init (EV_P_ unsigned int flags) 1523loop_init (EV_P_ unsigned int flags)
760{ 1524{
761 if (!method) 1525 if (!backend)
762 { 1526 {
1527#if EV_USE_REALTIME
1528 if (!have_realtime)
1529 {
1530 struct timespec ts;
1531
1532 if (!clock_gettime (CLOCK_REALTIME, &ts))
1533 have_realtime = 1;
1534 }
1535#endif
1536
763#if EV_USE_MONOTONIC 1537#if EV_USE_MONOTONIC
1538 if (!have_monotonic)
1539 {
1540 struct timespec ts;
1541
1542 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1543 have_monotonic = 1;
1544 }
1545#endif
1546
1547 ev_rt_now = ev_time ();
1548 mn_now = get_clock ();
1549 now_floor = mn_now;
1550 rtmn_diff = ev_rt_now - mn_now;
1551#if EV_MINIMAL < 2
1552 invoke_cb = ev_invoke_pending;
1553#endif
1554
1555 io_blocktime = 0.;
1556 timeout_blocktime = 0.;
1557 backend = 0;
1558 backend_fd = -1;
1559 gotasync = 0;
1560#if EV_USE_INOTIFY
1561 fs_fd = -2;
1562#endif
1563#if EV_USE_SIGNALFD
1564 sigfd = -2;
1565#endif
1566
1567 /* pid check not overridable via env */
1568#ifndef _WIN32
1569 if (flags & EVFLAG_FORKCHECK)
1570 curpid = getpid ();
1571#endif
1572
1573 if (!(flags & EVFLAG_NOENV)
1574 && !enable_secure ()
1575 && getenv ("LIBEV_FLAGS"))
1576 flags = atoi (getenv ("LIBEV_FLAGS"));
1577
1578 if (!(flags & 0x0000ffffU))
1579 flags |= ev_recommended_backends ();
1580
1581#if EV_USE_PORT
1582 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1583#endif
1584#if EV_USE_KQUEUE
1585 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1586#endif
1587#if EV_USE_EPOLL
1588 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1589#endif
1590#if EV_USE_POLL
1591 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1592#endif
1593#if EV_USE_SELECT
1594 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1595#endif
1596
1597 ev_prepare_init (&pending_w, pendingcb);
1598
1599 ev_init (&pipe_w, pipecb);
1600 ev_set_priority (&pipe_w, EV_MAXPRI);
1601 }
1602}
1603
1604/* free up a loop structure */
1605static void noinline
1606loop_destroy (EV_P)
1607{
1608 int i;
1609
1610 if (ev_is_active (&pipe_w))
1611 {
1612 /*ev_ref (EV_A);*/
1613 /*ev_io_stop (EV_A_ &pipe_w);*/
1614
1615#if EV_USE_EVENTFD
1616 if (evfd >= 0)
1617 close (evfd);
1618#endif
1619
1620 if (evpipe [0] >= 0)
1621 {
1622 close (evpipe [0]);
1623 close (evpipe [1]);
1624 }
1625 }
1626
1627#if EV_USE_SIGNALFD
1628 if (ev_is_active (&sigfd_w))
1629 {
1630 /*ev_ref (EV_A);*/
1631 /*ev_io_stop (EV_A_ &sigfd_w);*/
1632
1633 close (sigfd);
1634 }
1635#endif
1636
1637#if EV_USE_INOTIFY
1638 if (fs_fd >= 0)
1639 close (fs_fd);
1640#endif
1641
1642 if (backend_fd >= 0)
1643 close (backend_fd);
1644
1645#if EV_USE_PORT
1646 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1647#endif
1648#if EV_USE_KQUEUE
1649 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1650#endif
1651#if EV_USE_EPOLL
1652 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1653#endif
1654#if EV_USE_POLL
1655 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1656#endif
1657#if EV_USE_SELECT
1658 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1659#endif
1660
1661 for (i = NUMPRI; i--; )
1662 {
1663 array_free (pending, [i]);
1664#if EV_IDLE_ENABLE
1665 array_free (idle, [i]);
1666#endif
1667 }
1668
1669 ev_free (anfds); anfds = 0; anfdmax = 0;
1670
1671 /* have to use the microsoft-never-gets-it-right macro */
1672 array_free (rfeed, EMPTY);
1673 array_free (fdchange, EMPTY);
1674 array_free (timer, EMPTY);
1675#if EV_PERIODIC_ENABLE
1676 array_free (periodic, EMPTY);
1677#endif
1678#if EV_FORK_ENABLE
1679 array_free (fork, EMPTY);
1680#endif
1681 array_free (prepare, EMPTY);
1682 array_free (check, EMPTY);
1683#if EV_ASYNC_ENABLE
1684 array_free (async, EMPTY);
1685#endif
1686
1687 backend = 0;
1688}
1689
1690#if EV_USE_INOTIFY
1691inline_size void infy_fork (EV_P);
1692#endif
1693
1694inline_size void
1695loop_fork (EV_P)
1696{
1697#if EV_USE_PORT
1698 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1699#endif
1700#if EV_USE_KQUEUE
1701 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1702#endif
1703#if EV_USE_EPOLL
1704 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1705#endif
1706#if EV_USE_INOTIFY
1707 infy_fork (EV_A);
1708#endif
1709
1710 if (ev_is_active (&pipe_w))
1711 {
1712 /* this "locks" the handlers against writing to the pipe */
1713 /* while we modify the fd vars */
1714 gotsig = 1;
1715#if EV_ASYNC_ENABLE
1716 gotasync = 1;
1717#endif
1718
1719 ev_ref (EV_A);
1720 ev_io_stop (EV_A_ &pipe_w);
1721
1722#if EV_USE_EVENTFD
1723 if (evfd >= 0)
1724 close (evfd);
1725#endif
1726
1727 if (evpipe [0] >= 0)
1728 {
1729 close (evpipe [0]);
1730 close (evpipe [1]);
1731 }
1732
1733 evpipe_init (EV_A);
1734 /* now iterate over everything, in case we missed something */
1735 pipecb (EV_A_ &pipe_w, EV_READ);
1736 }
1737
1738 postfork = 0;
1739}
1740
1741#if EV_MULTIPLICITY
1742
1743struct ev_loop *
1744ev_loop_new (unsigned int flags)
1745{
1746 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1747
1748 memset (loop, 0, sizeof (struct ev_loop));
1749 loop_init (EV_A_ flags);
1750
1751 if (ev_backend (EV_A))
1752 return loop;
1753
1754 return 0;
1755}
1756
1757void
1758ev_loop_destroy (EV_P)
1759{
1760 loop_destroy (EV_A);
1761 ev_free (loop);
1762}
1763
1764void
1765ev_loop_fork (EV_P)
1766{
1767 postfork = 1; /* must be in line with ev_default_fork */
1768}
1769#endif /* multiplicity */
1770
1771#if EV_VERIFY
1772static void noinline
1773verify_watcher (EV_P_ W w)
1774{
1775 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1776
1777 if (w->pending)
1778 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1779}
1780
1781static void noinline
1782verify_heap (EV_P_ ANHE *heap, int N)
1783{
1784 int i;
1785
1786 for (i = HEAP0; i < N + HEAP0; ++i)
1787 {
1788 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1789 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1790 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1791
1792 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1793 }
1794}
1795
1796static void noinline
1797array_verify (EV_P_ W *ws, int cnt)
1798{
1799 while (cnt--)
1800 {
1801 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1802 verify_watcher (EV_A_ ws [cnt]);
1803 }
1804}
1805#endif
1806
1807#if EV_MINIMAL < 2
1808void
1809ev_loop_verify (EV_P)
1810{
1811#if EV_VERIFY
1812 int i;
1813 WL w;
1814
1815 assert (activecnt >= -1);
1816
1817 assert (fdchangemax >= fdchangecnt);
1818 for (i = 0; i < fdchangecnt; ++i)
1819 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1820
1821 assert (anfdmax >= 0);
1822 for (i = 0; i < anfdmax; ++i)
1823 for (w = anfds [i].head; w; w = w->next)
764 { 1824 {
765 struct timespec ts; 1825 verify_watcher (EV_A_ (W)w);
766 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1826 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
767 have_monotonic = 1; 1827 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
768 } 1828 }
769#endif
770 1829
771 ev_rt_now = ev_time (); 1830 assert (timermax >= timercnt);
772 mn_now = get_clock (); 1831 verify_heap (EV_A_ timers, timercnt);
773 now_floor = mn_now;
774 rtmn_diff = ev_rt_now - mn_now;
775 1832
776 if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS")) 1833#if EV_PERIODIC_ENABLE
777 flags = atoi (getenv ("LIBEV_FLAGS")); 1834 assert (periodicmax >= periodiccnt);
778 1835 verify_heap (EV_A_ periodics, periodiccnt);
779 if (!(flags & 0x0000ffff))
780 flags |= 0x0000ffff;
781
782 method = 0;
783#if EV_USE_KQUEUE
784 if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags);
785#endif
786#if EV_USE_EPOLL
787 if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags);
788#endif
789#if EV_USE_POLL
790 if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags);
791#endif
792#if EV_USE_SELECT
793 if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags);
794#endif
795
796 ev_init (&sigev, sigcb);
797 ev_set_priority (&sigev, EV_MAXPRI);
798 }
799}
800
801void
802loop_destroy (EV_P)
803{
804 int i;
805
806#if EV_USE_KQUEUE
807 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
808#endif
809#if EV_USE_EPOLL
810 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
811#endif
812#if EV_USE_POLL
813 if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
814#endif
815#if EV_USE_SELECT
816 if (method == EVMETHOD_SELECT) select_destroy (EV_A);
817#endif 1836#endif
818 1837
819 for (i = NUMPRI; i--; ) 1838 for (i = NUMPRI; i--; )
820 array_free (pending, [i]); 1839 {
1840 assert (pendingmax [i] >= pendingcnt [i]);
1841#if EV_IDLE_ENABLE
1842 assert (idleall >= 0);
1843 assert (idlemax [i] >= idlecnt [i]);
1844 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1845#endif
1846 }
821 1847
822 /* have to use the microsoft-never-gets-it-right macro */ 1848#if EV_FORK_ENABLE
823 array_free (fdchange, EMPTY0); 1849 assert (forkmax >= forkcnt);
824 array_free (timer, EMPTY0); 1850 array_verify (EV_A_ (W *)forks, forkcnt);
825#if EV_PERIODICS 1851#endif
826 array_free (periodic, EMPTY0); 1852
1853#if EV_ASYNC_ENABLE
1854 assert (asyncmax >= asynccnt);
1855 array_verify (EV_A_ (W *)asyncs, asynccnt);
1856#endif
1857
1858 assert (preparemax >= preparecnt);
1859 array_verify (EV_A_ (W *)prepares, preparecnt);
1860
1861 assert (checkmax >= checkcnt);
1862 array_verify (EV_A_ (W *)checks, checkcnt);
1863
1864# if 0
1865 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1866 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
827#endif 1867# endif
828 array_free (idle, EMPTY0);
829 array_free (prepare, EMPTY0);
830 array_free (check, EMPTY0);
831
832 method = 0;
833}
834
835static void
836loop_fork (EV_P)
837{
838#if EV_USE_EPOLL
839 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
840#endif 1868#endif
841#if EV_USE_KQUEUE
842 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
843#endif
844
845 if (ev_is_active (&sigev))
846 {
847 /* default loop */
848
849 ev_ref (EV_A);
850 ev_io_stop (EV_A_ &sigev);
851 close (sigpipe [0]);
852 close (sigpipe [1]);
853
854 while (pipe (sigpipe))
855 syserr ("(libev) error creating pipe");
856
857 siginit (EV_A);
858 }
859
860 postfork = 0;
861} 1869}
1870#endif
862 1871
863#if EV_MULTIPLICITY 1872#if EV_MULTIPLICITY
864struct ev_loop * 1873struct ev_loop *
865ev_loop_new (unsigned int flags) 1874ev_default_loop_init (unsigned int flags)
866{
867 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
868
869 memset (loop, 0, sizeof (struct ev_loop));
870
871 loop_init (EV_A_ flags);
872
873 if (ev_method (EV_A))
874 return loop;
875
876 return 0;
877}
878
879void
880ev_loop_destroy (EV_P)
881{
882 loop_destroy (EV_A);
883 ev_free (loop);
884}
885
886void
887ev_loop_fork (EV_P)
888{
889 postfork = 1;
890}
891
892#endif
893
894#if EV_MULTIPLICITY
895struct ev_loop *
896#else 1875#else
897int 1876int
898#endif
899ev_default_loop (unsigned int flags) 1877ev_default_loop (unsigned int flags)
1878#endif
900{ 1879{
901 if (sigpipe [0] == sigpipe [1])
902 if (pipe (sigpipe))
903 return 0;
904
905 if (!default_loop) 1880 if (!ev_default_loop_ptr)
906 { 1881 {
907#if EV_MULTIPLICITY 1882#if EV_MULTIPLICITY
908 struct ev_loop *loop = default_loop = &default_loop_struct; 1883 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
909#else 1884#else
910 default_loop = 1; 1885 ev_default_loop_ptr = 1;
911#endif 1886#endif
912 1887
913 loop_init (EV_A_ flags); 1888 loop_init (EV_A_ flags);
914 1889
915 if (ev_method (EV_A)) 1890 if (ev_backend (EV_A))
916 { 1891 {
917 siginit (EV_A);
918
919#ifndef _WIN32 1892#ifndef _WIN32
920 ev_signal_init (&childev, childcb, SIGCHLD); 1893 ev_signal_init (&childev, childcb, SIGCHLD);
921 ev_set_priority (&childev, EV_MAXPRI); 1894 ev_set_priority (&childev, EV_MAXPRI);
922 ev_signal_start (EV_A_ &childev); 1895 ev_signal_start (EV_A_ &childev);
923 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1896 ev_unref (EV_A); /* child watcher should not keep loop alive */
924#endif 1897#endif
925 } 1898 }
926 else 1899 else
927 default_loop = 0; 1900 ev_default_loop_ptr = 0;
928 } 1901 }
929 1902
930 return default_loop; 1903 return ev_default_loop_ptr;
931} 1904}
932 1905
933void 1906void
934ev_default_destroy (void) 1907ev_default_destroy (void)
935{ 1908{
936#if EV_MULTIPLICITY 1909#if EV_MULTIPLICITY
937 struct ev_loop *loop = default_loop; 1910 struct ev_loop *loop = ev_default_loop_ptr;
938#endif 1911#endif
1912
1913 ev_default_loop_ptr = 0;
939 1914
940#ifndef _WIN32 1915#ifndef _WIN32
941 ev_ref (EV_A); /* child watcher */ 1916 ev_ref (EV_A); /* child watcher */
942 ev_signal_stop (EV_A_ &childev); 1917 ev_signal_stop (EV_A_ &childev);
943#endif 1918#endif
944 1919
945 ev_ref (EV_A); /* signal watcher */
946 ev_io_stop (EV_A_ &sigev);
947
948 close (sigpipe [0]); sigpipe [0] = 0;
949 close (sigpipe [1]); sigpipe [1] = 0;
950
951 loop_destroy (EV_A); 1920 loop_destroy (EV_A);
952} 1921}
953 1922
954void 1923void
955ev_default_fork (void) 1924ev_default_fork (void)
956{ 1925{
957#if EV_MULTIPLICITY 1926#if EV_MULTIPLICITY
958 struct ev_loop *loop = default_loop; 1927 struct ev_loop *loop = ev_default_loop_ptr;
959#endif 1928#endif
960 1929
961 if (method) 1930 postfork = 1; /* must be in line with ev_loop_fork */
962 postfork = 1;
963} 1931}
964 1932
965/*****************************************************************************/ 1933/*****************************************************************************/
966 1934
967static int 1935void
968any_pending (EV_P) 1936ev_invoke (EV_P_ void *w, int revents)
1937{
1938 EV_CB_INVOKE ((W)w, revents);
1939}
1940
1941unsigned int
1942ev_pending_count (EV_P)
969{ 1943{
970 int pri; 1944 int pri;
1945 unsigned int count = 0;
971 1946
972 for (pri = NUMPRI; pri--; ) 1947 for (pri = NUMPRI; pri--; )
973 if (pendingcnt [pri]) 1948 count += pendingcnt [pri];
974 return 1;
975 1949
976 return 0; 1950 return count;
977} 1951}
978 1952
979static void 1953void noinline
980call_pending (EV_P) 1954ev_invoke_pending (EV_P)
981{ 1955{
982 int pri; 1956 int pri;
983 1957
984 for (pri = NUMPRI; pri--; ) 1958 for (pri = NUMPRI; pri--; )
985 while (pendingcnt [pri]) 1959 while (pendingcnt [pri])
986 { 1960 {
987 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1961 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
988 1962
989 if (p->w) 1963 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
990 { 1964 /* ^ this is no longer true, as pending_w could be here */
1965
991 p->w->pending = 0; 1966 p->w->pending = 0;
992 EV_CB_INVOKE (p->w, p->events); 1967 EV_CB_INVOKE (p->w, p->events);
993 } 1968 EV_FREQUENT_CHECK;
994 } 1969 }
995} 1970}
996 1971
997static void 1972#if EV_IDLE_ENABLE
1973/* make idle watchers pending. this handles the "call-idle */
1974/* only when higher priorities are idle" logic */
1975inline_size void
1976idle_reify (EV_P)
1977{
1978 if (expect_false (idleall))
1979 {
1980 int pri;
1981
1982 for (pri = NUMPRI; pri--; )
1983 {
1984 if (pendingcnt [pri])
1985 break;
1986
1987 if (idlecnt [pri])
1988 {
1989 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1990 break;
1991 }
1992 }
1993 }
1994}
1995#endif
1996
1997/* make timers pending */
1998inline_size void
998timers_reify (EV_P) 1999timers_reify (EV_P)
999{ 2000{
2001 EV_FREQUENT_CHECK;
2002
1000 while (timercnt && ((WT)timers [0])->at <= mn_now) 2003 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1001 { 2004 {
1002 struct ev_timer *w = timers [0]; 2005 do
1003
1004 assert (("inactive timer on timer heap detected", ev_is_active (w)));
1005
1006 /* first reschedule or stop timer */
1007 if (w->repeat)
1008 { 2006 {
2007 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2008
2009 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2010
2011 /* first reschedule or stop timer */
2012 if (w->repeat)
2013 {
2014 ev_at (w) += w->repeat;
2015 if (ev_at (w) < mn_now)
2016 ev_at (w) = mn_now;
2017
1009 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2018 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1010 2019
1011 ((WT)w)->at += w->repeat; 2020 ANHE_at_cache (timers [HEAP0]);
1012 if (((WT)w)->at < mn_now)
1013 ((WT)w)->at = mn_now;
1014
1015 downheap ((WT *)timers, timercnt, 0); 2021 downheap (timers, timercnt, HEAP0);
2022 }
2023 else
2024 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2025
2026 EV_FREQUENT_CHECK;
2027 feed_reverse (EV_A_ (W)w);
1016 } 2028 }
1017 else 2029 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1018 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1019 2030
1020 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2031 feed_reverse_done (EV_A_ EV_TIMEOUT);
1021 } 2032 }
1022} 2033}
1023 2034
1024#if EV_PERIODICS 2035#if EV_PERIODIC_ENABLE
1025static void 2036/* make periodics pending */
2037inline_size void
1026periodics_reify (EV_P) 2038periodics_reify (EV_P)
1027{ 2039{
2040 EV_FREQUENT_CHECK;
2041
1028 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 2042 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1029 { 2043 {
1030 struct ev_periodic *w = periodics [0]; 2044 int feed_count = 0;
1031 2045
2046 do
2047 {
2048 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2049
1032 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 2050 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1033 2051
1034 /* first reschedule or stop timer */ 2052 /* first reschedule or stop timer */
2053 if (w->reschedule_cb)
2054 {
2055 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2056
2057 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2058
2059 ANHE_at_cache (periodics [HEAP0]);
2060 downheap (periodics, periodiccnt, HEAP0);
2061 }
2062 else if (w->interval)
2063 {
2064 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2065 /* if next trigger time is not sufficiently in the future, put it there */
2066 /* this might happen because of floating point inexactness */
2067 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2068 {
2069 ev_at (w) += w->interval;
2070
2071 /* if interval is unreasonably low we might still have a time in the past */
2072 /* so correct this. this will make the periodic very inexact, but the user */
2073 /* has effectively asked to get triggered more often than possible */
2074 if (ev_at (w) < ev_rt_now)
2075 ev_at (w) = ev_rt_now;
2076 }
2077
2078 ANHE_at_cache (periodics [HEAP0]);
2079 downheap (periodics, periodiccnt, HEAP0);
2080 }
2081 else
2082 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2083
2084 EV_FREQUENT_CHECK;
2085 feed_reverse (EV_A_ (W)w);
2086 }
2087 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2088
2089 feed_reverse_done (EV_A_ EV_PERIODIC);
2090 }
2091}
2092
2093/* simply recalculate all periodics */
2094/* TODO: maybe ensure that at leats one event happens when jumping forward? */
2095static void noinline
2096periodics_reschedule (EV_P)
2097{
2098 int i;
2099
2100 /* adjust periodics after time jump */
2101 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2102 {
2103 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2104
1035 if (w->reschedule_cb) 2105 if (w->reschedule_cb)
2106 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2107 else if (w->interval)
2108 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2109
2110 ANHE_at_cache (periodics [i]);
2111 }
2112
2113 reheap (periodics, periodiccnt);
2114}
2115#endif
2116
2117/* adjust all timers by a given offset */
2118static void noinline
2119timers_reschedule (EV_P_ ev_tstamp adjust)
2120{
2121 int i;
2122
2123 for (i = 0; i < timercnt; ++i)
2124 {
2125 ANHE *he = timers + i + HEAP0;
2126 ANHE_w (*he)->at += adjust;
2127 ANHE_at_cache (*he);
2128 }
2129}
2130
2131/* fetch new monotonic and realtime times from the kernel */
2132/* also detetc if there was a timejump, and act accordingly */
2133inline_speed void
2134time_update (EV_P_ ev_tstamp max_block)
2135{
2136#if EV_USE_MONOTONIC
2137 if (expect_true (have_monotonic))
2138 {
2139 int i;
2140 ev_tstamp odiff = rtmn_diff;
2141
2142 mn_now = get_clock ();
2143
2144 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2145 /* interpolate in the meantime */
2146 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1036 { 2147 {
1037 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 2148 ev_rt_now = rtmn_diff + mn_now;
1038 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 2149 return;
1039 downheap ((WT *)periodics, periodiccnt, 0);
1040 } 2150 }
1041 else if (w->interval)
1042 {
1043 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1044 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1045 downheap ((WT *)periodics, periodiccnt, 0);
1046 }
1047 else
1048 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1049 2151
1050 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1051 }
1052}
1053
1054static void
1055periodics_reschedule (EV_P)
1056{
1057 int i;
1058
1059 /* adjust periodics after time jump */
1060 for (i = 0; i < periodiccnt; ++i)
1061 {
1062 struct ev_periodic *w = periodics [i];
1063
1064 if (w->reschedule_cb)
1065 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1066 else if (w->interval)
1067 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1068 }
1069
1070 /* now rebuild the heap */
1071 for (i = periodiccnt >> 1; i--; )
1072 downheap ((WT *)periodics, periodiccnt, i);
1073}
1074#endif
1075
1076inline int
1077time_update_monotonic (EV_P)
1078{
1079 mn_now = get_clock ();
1080
1081 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1082 {
1083 ev_rt_now = rtmn_diff + mn_now;
1084 return 0;
1085 }
1086 else
1087 {
1088 now_floor = mn_now; 2152 now_floor = mn_now;
1089 ev_rt_now = ev_time (); 2153 ev_rt_now = ev_time ();
1090 return 1;
1091 }
1092}
1093 2154
1094static void 2155 /* loop a few times, before making important decisions.
1095time_update (EV_P) 2156 * on the choice of "4": one iteration isn't enough,
1096{ 2157 * in case we get preempted during the calls to
1097 int i; 2158 * ev_time and get_clock. a second call is almost guaranteed
1098 2159 * to succeed in that case, though. and looping a few more times
1099#if EV_USE_MONOTONIC 2160 * doesn't hurt either as we only do this on time-jumps or
1100 if (expect_true (have_monotonic)) 2161 * in the unlikely event of having been preempted here.
1101 { 2162 */
1102 if (time_update_monotonic (EV_A)) 2163 for (i = 4; --i; )
1103 { 2164 {
1104 ev_tstamp odiff = rtmn_diff;
1105
1106 for (i = 4; --i; ) /* loop a few times, before making important decisions */
1107 {
1108 rtmn_diff = ev_rt_now - mn_now; 2165 rtmn_diff = ev_rt_now - mn_now;
1109 2166
1110 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2167 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1111 return; /* all is well */ 2168 return; /* all is well */
1112 2169
1113 ev_rt_now = ev_time (); 2170 ev_rt_now = ev_time ();
1114 mn_now = get_clock (); 2171 mn_now = get_clock ();
1115 now_floor = mn_now; 2172 now_floor = mn_now;
1116 } 2173 }
1117 2174
2175 /* no timer adjustment, as the monotonic clock doesn't jump */
2176 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1118# if EV_PERIODICS 2177# if EV_PERIODIC_ENABLE
2178 periodics_reschedule (EV_A);
2179# endif
2180 }
2181 else
2182#endif
2183 {
2184 ev_rt_now = ev_time ();
2185
2186 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2187 {
2188 /* adjust timers. this is easy, as the offset is the same for all of them */
2189 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2190#if EV_PERIODIC_ENABLE
1119 periodics_reschedule (EV_A); 2191 periodics_reschedule (EV_A);
1120# endif 2192#endif
1121 /* no timer adjustment, as the monotonic clock doesn't jump */
1122 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1123 } 2193 }
1124 }
1125 else
1126#endif
1127 {
1128 ev_rt_now = ev_time ();
1129
1130 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1131 {
1132#if EV_PERIODICS
1133 periodics_reschedule (EV_A);
1134#endif
1135
1136 /* adjust timers. this is easy, as the offset is the same for all */
1137 for (i = 0; i < timercnt; ++i)
1138 ((WT)timers [i])->at += ev_rt_now - mn_now;
1139 }
1140 2194
1141 mn_now = ev_rt_now; 2195 mn_now = ev_rt_now;
1142 } 2196 }
1143} 2197}
1144 2198
1145void 2199void
1146ev_ref (EV_P)
1147{
1148 ++activecnt;
1149}
1150
1151void
1152ev_unref (EV_P)
1153{
1154 --activecnt;
1155}
1156
1157static int loop_done;
1158
1159void
1160ev_loop (EV_P_ int flags) 2200ev_loop (EV_P_ int flags)
1161{ 2201{
1162 double block; 2202#if EV_MINIMAL < 2
1163 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 2203 ++loop_depth;
2204#endif
1164 2205
1165 while (activecnt) 2206 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2207
2208 loop_done = EVUNLOOP_CANCEL;
2209
2210 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2211
2212 do
1166 { 2213 {
2214#if EV_VERIFY >= 2
2215 ev_loop_verify (EV_A);
2216#endif
2217
2218#ifndef _WIN32
2219 if (expect_false (curpid)) /* penalise the forking check even more */
2220 if (expect_false (getpid () != curpid))
2221 {
2222 curpid = getpid ();
2223 postfork = 1;
2224 }
2225#endif
2226
2227#if EV_FORK_ENABLE
2228 /* we might have forked, so queue fork handlers */
2229 if (expect_false (postfork))
2230 if (forkcnt)
2231 {
2232 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2233 EV_INVOKE_PENDING;
2234 }
2235#endif
2236
1167 /* queue check watchers (and execute them) */ 2237 /* queue prepare watchers (and execute them) */
1168 if (expect_false (preparecnt)) 2238 if (expect_false (preparecnt))
1169 { 2239 {
1170 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2240 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1171 call_pending (EV_A); 2241 EV_INVOKE_PENDING;
1172 } 2242 }
2243
2244 if (expect_false (loop_done))
2245 break;
1173 2246
1174 /* we might have forked, so reify kernel state if necessary */ 2247 /* we might have forked, so reify kernel state if necessary */
1175 if (expect_false (postfork)) 2248 if (expect_false (postfork))
1176 loop_fork (EV_A); 2249 loop_fork (EV_A);
1177 2250
1178 /* update fd-related kernel structures */ 2251 /* update fd-related kernel structures */
1179 fd_reify (EV_A); 2252 fd_reify (EV_A);
1180 2253
1181 /* calculate blocking time */ 2254 /* calculate blocking time */
2255 {
2256 ev_tstamp waittime = 0.;
2257 ev_tstamp sleeptime = 0.;
1182 2258
1183 /* we only need this for !monotonic clock or timers, but as we basically 2259 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1184 always have timers, we just calculate it always */
1185#if EV_USE_MONOTONIC
1186 if (expect_true (have_monotonic))
1187 time_update_monotonic (EV_A);
1188 else
1189#endif
1190 { 2260 {
1191 ev_rt_now = ev_time (); 2261 /* remember old timestamp for io_blocktime calculation */
1192 mn_now = ev_rt_now; 2262 ev_tstamp prev_mn_now = mn_now;
1193 }
1194 2263
1195 if (flags & EVLOOP_NONBLOCK || idlecnt) 2264 /* update time to cancel out callback processing overhead */
1196 block = 0.; 2265 time_update (EV_A_ 1e100);
1197 else 2266
1198 {
1199 block = MAX_BLOCKTIME; 2267 waittime = MAX_BLOCKTIME;
1200 2268
1201 if (timercnt) 2269 if (timercnt)
1202 { 2270 {
1203 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 2271 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1204 if (block > to) block = to; 2272 if (waittime > to) waittime = to;
1205 } 2273 }
1206 2274
1207#if EV_PERIODICS 2275#if EV_PERIODIC_ENABLE
1208 if (periodiccnt) 2276 if (periodiccnt)
1209 { 2277 {
1210 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; 2278 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1211 if (block > to) block = to; 2279 if (waittime > to) waittime = to;
1212 } 2280 }
1213#endif 2281#endif
1214 2282
1215 if (block < 0.) block = 0.; 2283 /* don't let timeouts decrease the waittime below timeout_blocktime */
2284 if (expect_false (waittime < timeout_blocktime))
2285 waittime = timeout_blocktime;
2286
2287 /* extra check because io_blocktime is commonly 0 */
2288 if (expect_false (io_blocktime))
2289 {
2290 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2291
2292 if (sleeptime > waittime - backend_fudge)
2293 sleeptime = waittime - backend_fudge;
2294
2295 if (expect_true (sleeptime > 0.))
2296 {
2297 ev_sleep (sleeptime);
2298 waittime -= sleeptime;
2299 }
2300 }
1216 } 2301 }
1217 2302
1218 method_poll (EV_A_ block); 2303#if EV_MINIMAL < 2
2304 ++loop_count;
2305#endif
2306 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2307 backend_poll (EV_A_ waittime);
2308 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
1219 2309
1220 /* update ev_rt_now, do magic */ 2310 /* update ev_rt_now, do magic */
1221 time_update (EV_A); 2311 time_update (EV_A_ waittime + sleeptime);
2312 }
1222 2313
1223 /* queue pending timers and reschedule them */ 2314 /* queue pending timers and reschedule them */
1224 timers_reify (EV_A); /* relative timers called last */ 2315 timers_reify (EV_A); /* relative timers called last */
1225#if EV_PERIODICS 2316#if EV_PERIODIC_ENABLE
1226 periodics_reify (EV_A); /* absolute timers called first */ 2317 periodics_reify (EV_A); /* absolute timers called first */
1227#endif 2318#endif
1228 2319
2320#if EV_IDLE_ENABLE
1229 /* queue idle watchers unless io or timers are pending */ 2321 /* queue idle watchers unless other events are pending */
1230 if (idlecnt && !any_pending (EV_A)) 2322 idle_reify (EV_A);
1231 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2323#endif
1232 2324
1233 /* queue check watchers, to be executed first */ 2325 /* queue check watchers, to be executed first */
1234 if (checkcnt) 2326 if (expect_false (checkcnt))
1235 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2327 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1236 2328
1237 call_pending (EV_A); 2329 EV_INVOKE_PENDING;
1238
1239 if (loop_done)
1240 break;
1241 } 2330 }
2331 while (expect_true (
2332 activecnt
2333 && !loop_done
2334 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2335 ));
1242 2336
1243 if (loop_done != 2) 2337 if (loop_done == EVUNLOOP_ONE)
1244 loop_done = 0; 2338 loop_done = EVUNLOOP_CANCEL;
2339
2340#if EV_MINIMAL < 2
2341 --loop_depth;
2342#endif
1245} 2343}
1246 2344
1247void 2345void
1248ev_unloop (EV_P_ int how) 2346ev_unloop (EV_P_ int how)
1249{ 2347{
1250 loop_done = how; 2348 loop_done = how;
1251} 2349}
1252 2350
2351void
2352ev_ref (EV_P)
2353{
2354 ++activecnt;
2355}
2356
2357void
2358ev_unref (EV_P)
2359{
2360 --activecnt;
2361}
2362
2363void
2364ev_now_update (EV_P)
2365{
2366 time_update (EV_A_ 1e100);
2367}
2368
2369void
2370ev_suspend (EV_P)
2371{
2372 ev_now_update (EV_A);
2373}
2374
2375void
2376ev_resume (EV_P)
2377{
2378 ev_tstamp mn_prev = mn_now;
2379
2380 ev_now_update (EV_A);
2381 timers_reschedule (EV_A_ mn_now - mn_prev);
2382#if EV_PERIODIC_ENABLE
2383 /* TODO: really do this? */
2384 periodics_reschedule (EV_A);
2385#endif
2386}
2387
1253/*****************************************************************************/ 2388/*****************************************************************************/
2389/* singly-linked list management, used when the expected list length is short */
1254 2390
1255inline void 2391inline_size void
1256wlist_add (WL *head, WL elem) 2392wlist_add (WL *head, WL elem)
1257{ 2393{
1258 elem->next = *head; 2394 elem->next = *head;
1259 *head = elem; 2395 *head = elem;
1260} 2396}
1261 2397
1262inline void 2398inline_size void
1263wlist_del (WL *head, WL elem) 2399wlist_del (WL *head, WL elem)
1264{ 2400{
1265 while (*head) 2401 while (*head)
1266 { 2402 {
1267 if (*head == elem) 2403 if (*head == elem)
… …
1272 2408
1273 head = &(*head)->next; 2409 head = &(*head)->next;
1274 } 2410 }
1275} 2411}
1276 2412
2413/* internal, faster, version of ev_clear_pending */
1277inline void 2414inline_speed void
1278ev_clear_pending (EV_P_ W w) 2415clear_pending (EV_P_ W w)
1279{ 2416{
1280 if (w->pending) 2417 if (w->pending)
1281 { 2418 {
1282 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2419 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1283 w->pending = 0; 2420 w->pending = 0;
1284 } 2421 }
1285} 2422}
1286 2423
2424int
2425ev_clear_pending (EV_P_ void *w)
2426{
2427 W w_ = (W)w;
2428 int pending = w_->pending;
2429
2430 if (expect_true (pending))
2431 {
2432 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2433 p->w = (W)&pending_w;
2434 w_->pending = 0;
2435 return p->events;
2436 }
2437 else
2438 return 0;
2439}
2440
1287inline void 2441inline_size void
2442pri_adjust (EV_P_ W w)
2443{
2444 int pri = ev_priority (w);
2445 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2446 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2447 ev_set_priority (w, pri);
2448}
2449
2450inline_speed void
1288ev_start (EV_P_ W w, int active) 2451ev_start (EV_P_ W w, int active)
1289{ 2452{
1290 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2453 pri_adjust (EV_A_ w);
1291 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1292
1293 w->active = active; 2454 w->active = active;
1294 ev_ref (EV_A); 2455 ev_ref (EV_A);
1295} 2456}
1296 2457
1297inline void 2458inline_size void
1298ev_stop (EV_P_ W w) 2459ev_stop (EV_P_ W w)
1299{ 2460{
1300 ev_unref (EV_A); 2461 ev_unref (EV_A);
1301 w->active = 0; 2462 w->active = 0;
1302} 2463}
1303 2464
1304/*****************************************************************************/ 2465/*****************************************************************************/
1305 2466
1306void 2467void noinline
1307ev_io_start (EV_P_ struct ev_io *w) 2468ev_io_start (EV_P_ ev_io *w)
1308{ 2469{
1309 int fd = w->fd; 2470 int fd = w->fd;
1310 2471
1311 if (ev_is_active (w)) 2472 if (expect_false (ev_is_active (w)))
1312 return; 2473 return;
1313 2474
1314 assert (("ev_io_start called with negative fd", fd >= 0)); 2475 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2476 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2477
2478 EV_FREQUENT_CHECK;
1315 2479
1316 ev_start (EV_A_ (W)w, 1); 2480 ev_start (EV_A_ (W)w, 1);
1317 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2481 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1318 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2482 wlist_add (&anfds[fd].head, (WL)w);
1319 2483
1320 fd_change (EV_A_ fd); 2484 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1321} 2485 w->events &= ~EV__IOFDSET;
1322 2486
1323void 2487 EV_FREQUENT_CHECK;
2488}
2489
2490void noinline
1324ev_io_stop (EV_P_ struct ev_io *w) 2491ev_io_stop (EV_P_ ev_io *w)
1325{ 2492{
1326 ev_clear_pending (EV_A_ (W)w); 2493 clear_pending (EV_A_ (W)w);
1327 if (!ev_is_active (w)) 2494 if (expect_false (!ev_is_active (w)))
1328 return; 2495 return;
1329 2496
1330 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2497 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1331 2498
2499 EV_FREQUENT_CHECK;
2500
1332 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2501 wlist_del (&anfds[w->fd].head, (WL)w);
1333 ev_stop (EV_A_ (W)w); 2502 ev_stop (EV_A_ (W)w);
1334 2503
1335 fd_change (EV_A_ w->fd); 2504 fd_change (EV_A_ w->fd, 1);
1336}
1337 2505
1338void 2506 EV_FREQUENT_CHECK;
2507}
2508
2509void noinline
1339ev_timer_start (EV_P_ struct ev_timer *w) 2510ev_timer_start (EV_P_ ev_timer *w)
1340{ 2511{
1341 if (ev_is_active (w)) 2512 if (expect_false (ev_is_active (w)))
1342 return; 2513 return;
1343 2514
1344 ((WT)w)->at += mn_now; 2515 ev_at (w) += mn_now;
1345 2516
1346 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2517 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1347 2518
2519 EV_FREQUENT_CHECK;
2520
2521 ++timercnt;
1348 ev_start (EV_A_ (W)w, ++timercnt); 2522 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1349 array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2); 2523 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1350 timers [timercnt - 1] = w; 2524 ANHE_w (timers [ev_active (w)]) = (WT)w;
1351 upheap ((WT *)timers, timercnt - 1); 2525 ANHE_at_cache (timers [ev_active (w)]);
2526 upheap (timers, ev_active (w));
1352 2527
2528 EV_FREQUENT_CHECK;
2529
1353 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2530 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1354} 2531}
1355 2532
1356void 2533void noinline
1357ev_timer_stop (EV_P_ struct ev_timer *w) 2534ev_timer_stop (EV_P_ ev_timer *w)
1358{ 2535{
1359 ev_clear_pending (EV_A_ (W)w); 2536 clear_pending (EV_A_ (W)w);
1360 if (!ev_is_active (w)) 2537 if (expect_false (!ev_is_active (w)))
1361 return; 2538 return;
1362 2539
2540 EV_FREQUENT_CHECK;
2541
2542 {
2543 int active = ev_active (w);
2544
1363 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2545 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1364 2546
1365 if (((W)w)->active < timercnt--) 2547 --timercnt;
2548
2549 if (expect_true (active < timercnt + HEAP0))
1366 { 2550 {
1367 timers [((W)w)->active - 1] = timers [timercnt]; 2551 timers [active] = timers [timercnt + HEAP0];
1368 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2552 adjustheap (timers, timercnt, active);
1369 } 2553 }
2554 }
1370 2555
1371 ((WT)w)->at -= mn_now; 2556 EV_FREQUENT_CHECK;
2557
2558 ev_at (w) -= mn_now;
1372 2559
1373 ev_stop (EV_A_ (W)w); 2560 ev_stop (EV_A_ (W)w);
1374} 2561}
1375 2562
1376void 2563void noinline
1377ev_timer_again (EV_P_ struct ev_timer *w) 2564ev_timer_again (EV_P_ ev_timer *w)
1378{ 2565{
2566 EV_FREQUENT_CHECK;
2567
1379 if (ev_is_active (w)) 2568 if (ev_is_active (w))
1380 { 2569 {
1381 if (w->repeat) 2570 if (w->repeat)
1382 { 2571 {
1383 ((WT)w)->at = mn_now + w->repeat; 2572 ev_at (w) = mn_now + w->repeat;
2573 ANHE_at_cache (timers [ev_active (w)]);
1384 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2574 adjustheap (timers, timercnt, ev_active (w));
1385 } 2575 }
1386 else 2576 else
1387 ev_timer_stop (EV_A_ w); 2577 ev_timer_stop (EV_A_ w);
1388 } 2578 }
1389 else if (w->repeat) 2579 else if (w->repeat)
1390 { 2580 {
1391 w->at = w->repeat; 2581 ev_at (w) = w->repeat;
1392 ev_timer_start (EV_A_ w); 2582 ev_timer_start (EV_A_ w);
1393 } 2583 }
1394}
1395 2584
2585 EV_FREQUENT_CHECK;
2586}
2587
2588ev_tstamp
2589ev_timer_remaining (EV_P_ ev_timer *w)
2590{
2591 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2592}
2593
1396#if EV_PERIODICS 2594#if EV_PERIODIC_ENABLE
1397void 2595void noinline
1398ev_periodic_start (EV_P_ struct ev_periodic *w) 2596ev_periodic_start (EV_P_ ev_periodic *w)
1399{ 2597{
1400 if (ev_is_active (w)) 2598 if (expect_false (ev_is_active (w)))
1401 return; 2599 return;
1402 2600
1403 if (w->reschedule_cb) 2601 if (w->reschedule_cb)
1404 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2602 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1405 else if (w->interval) 2603 else if (w->interval)
1406 { 2604 {
1407 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2605 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1408 /* this formula differs from the one in periodic_reify because we do not always round up */ 2606 /* this formula differs from the one in periodic_reify because we do not always round up */
1409 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2607 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1410 } 2608 }
2609 else
2610 ev_at (w) = w->offset;
1411 2611
2612 EV_FREQUENT_CHECK;
2613
2614 ++periodiccnt;
1412 ev_start (EV_A_ (W)w, ++periodiccnt); 2615 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1413 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 2616 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1414 periodics [periodiccnt - 1] = w; 2617 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1415 upheap ((WT *)periodics, periodiccnt - 1); 2618 ANHE_at_cache (periodics [ev_active (w)]);
2619 upheap (periodics, ev_active (w));
1416 2620
2621 EV_FREQUENT_CHECK;
2622
1417 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2623 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1418} 2624}
1419 2625
1420void 2626void noinline
1421ev_periodic_stop (EV_P_ struct ev_periodic *w) 2627ev_periodic_stop (EV_P_ ev_periodic *w)
1422{ 2628{
1423 ev_clear_pending (EV_A_ (W)w); 2629 clear_pending (EV_A_ (W)w);
1424 if (!ev_is_active (w)) 2630 if (expect_false (!ev_is_active (w)))
1425 return; 2631 return;
1426 2632
2633 EV_FREQUENT_CHECK;
2634
2635 {
2636 int active = ev_active (w);
2637
1427 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2638 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1428 2639
1429 if (((W)w)->active < periodiccnt--) 2640 --periodiccnt;
2641
2642 if (expect_true (active < periodiccnt + HEAP0))
1430 { 2643 {
1431 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2644 periodics [active] = periodics [periodiccnt + HEAP0];
1432 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2645 adjustheap (periodics, periodiccnt, active);
1433 } 2646 }
2647 }
2648
2649 EV_FREQUENT_CHECK;
1434 2650
1435 ev_stop (EV_A_ (W)w); 2651 ev_stop (EV_A_ (W)w);
1436} 2652}
1437 2653
1438void 2654void noinline
1439ev_periodic_again (EV_P_ struct ev_periodic *w) 2655ev_periodic_again (EV_P_ ev_periodic *w)
1440{ 2656{
1441 /* TODO: use adjustheap and recalculation */ 2657 /* TODO: use adjustheap and recalculation */
1442 ev_periodic_stop (EV_A_ w); 2658 ev_periodic_stop (EV_A_ w);
1443 ev_periodic_start (EV_A_ w); 2659 ev_periodic_start (EV_A_ w);
1444} 2660}
1445#endif 2661#endif
1446 2662
1447void
1448ev_idle_start (EV_P_ struct ev_idle *w)
1449{
1450 if (ev_is_active (w))
1451 return;
1452
1453 ev_start (EV_A_ (W)w, ++idlecnt);
1454 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1455 idles [idlecnt - 1] = w;
1456}
1457
1458void
1459ev_idle_stop (EV_P_ struct ev_idle *w)
1460{
1461 ev_clear_pending (EV_A_ (W)w);
1462 if (!ev_is_active (w))
1463 return;
1464
1465 idles [((W)w)->active - 1] = idles [--idlecnt];
1466 ev_stop (EV_A_ (W)w);
1467}
1468
1469void
1470ev_prepare_start (EV_P_ struct ev_prepare *w)
1471{
1472 if (ev_is_active (w))
1473 return;
1474
1475 ev_start (EV_A_ (W)w, ++preparecnt);
1476 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1477 prepares [preparecnt - 1] = w;
1478}
1479
1480void
1481ev_prepare_stop (EV_P_ struct ev_prepare *w)
1482{
1483 ev_clear_pending (EV_A_ (W)w);
1484 if (!ev_is_active (w))
1485 return;
1486
1487 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1488 ev_stop (EV_A_ (W)w);
1489}
1490
1491void
1492ev_check_start (EV_P_ struct ev_check *w)
1493{
1494 if (ev_is_active (w))
1495 return;
1496
1497 ev_start (EV_A_ (W)w, ++checkcnt);
1498 array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
1499 checks [checkcnt - 1] = w;
1500}
1501
1502void
1503ev_check_stop (EV_P_ struct ev_check *w)
1504{
1505 ev_clear_pending (EV_A_ (W)w);
1506 if (!ev_is_active (w))
1507 return;
1508
1509 checks [((W)w)->active - 1] = checks [--checkcnt];
1510 ev_stop (EV_A_ (W)w);
1511}
1512
1513#ifndef SA_RESTART 2663#ifndef SA_RESTART
1514# define SA_RESTART 0 2664# define SA_RESTART 0
1515#endif 2665#endif
1516 2666
1517void 2667void noinline
1518ev_signal_start (EV_P_ struct ev_signal *w) 2668ev_signal_start (EV_P_ ev_signal *w)
1519{ 2669{
1520#if EV_MULTIPLICITY 2670#if EV_MULTIPLICITY
1521 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2671 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1522#endif 2672#endif
1523 if (ev_is_active (w)) 2673 if (expect_false (ev_is_active (w)))
1524 return; 2674 return;
1525 2675
1526 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2676 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2677
2678 EV_FREQUENT_CHECK;
2679
2680#if EV_USE_SIGNALFD
2681 if (sigfd == -2)
2682 {
2683 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2684 if (sigfd < 0 && errno == EINVAL)
2685 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2686
2687 if (sigfd >= 0)
2688 {
2689 fd_intern (sigfd); /* doing it twice will not hurt */
2690
2691 sigemptyset (&sigfd_set);
2692
2693 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2694 ev_set_priority (&sigfd_w, EV_MAXPRI);
2695 ev_io_start (EV_A_ &sigfd_w);
2696 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2697 }
2698 }
2699
2700 if (sigfd >= 0)
2701 {
2702 /* TODO: check .head */
2703 sigaddset (&sigfd_set, w->signum);
2704 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2705
2706 signalfd (sigfd, &sigfd_set, 0);
2707 }
2708 else
2709#endif
2710 evpipe_init (EV_A);
2711
2712 {
2713#ifndef _WIN32
2714 sigset_t full, prev;
2715 sigfillset (&full);
2716 sigprocmask (SIG_SETMASK, &full, &prev);
2717#endif
2718
2719 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2720
2721#ifndef _WIN32
2722# if EV_USE_SIGNALFD
2723 if (sigfd < 0)/*TODO*/
2724# endif
2725 sigdelset (&prev, w->signum);
2726 sigprocmask (SIG_SETMASK, &prev, 0);
2727#endif
2728 }
1527 2729
1528 ev_start (EV_A_ (W)w, 1); 2730 ev_start (EV_A_ (W)w, 1);
1529 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1530 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2731 wlist_add (&signals [w->signum - 1].head, (WL)w);
1531 2732
1532 if (!((WL)w)->next) 2733 if (!((WL)w)->next)
1533 { 2734 {
1534#if _WIN32 2735#if _WIN32
1535 signal (w->signum, sighandler); 2736 signal (w->signum, ev_sighandler);
1536#else 2737#else
2738# if EV_USE_SIGNALFD
2739 if (sigfd < 0) /*TODO*/
2740# endif
2741 {
1537 struct sigaction sa; 2742 struct sigaction sa = { };
1538 sa.sa_handler = sighandler; 2743 sa.sa_handler = ev_sighandler;
1539 sigfillset (&sa.sa_mask); 2744 sigfillset (&sa.sa_mask);
1540 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2745 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1541 sigaction (w->signum, &sa, 0); 2746 sigaction (w->signum, &sa, 0);
2747 }
1542#endif 2748#endif
1543 } 2749 }
1544}
1545 2750
1546void 2751 EV_FREQUENT_CHECK;
2752}
2753
2754void noinline
1547ev_signal_stop (EV_P_ struct ev_signal *w) 2755ev_signal_stop (EV_P_ ev_signal *w)
1548{ 2756{
1549 ev_clear_pending (EV_A_ (W)w); 2757 clear_pending (EV_A_ (W)w);
1550 if (!ev_is_active (w)) 2758 if (expect_false (!ev_is_active (w)))
1551 return; 2759 return;
1552 2760
2761 EV_FREQUENT_CHECK;
2762
1553 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2763 wlist_del (&signals [w->signum - 1].head, (WL)w);
1554 ev_stop (EV_A_ (W)w); 2764 ev_stop (EV_A_ (W)w);
1555 2765
1556 if (!signals [w->signum - 1].head) 2766 if (!signals [w->signum - 1].head)
2767#if EV_USE_SIGNALFD
2768 if (sigfd >= 0)
2769 {
2770 sigprocmask (SIG_UNBLOCK, &sigfd_set, 0);//D
2771 sigdelset (&sigfd_set, w->signum);
2772 signalfd (sigfd, &sigfd_set, 0);
2773 sigprocmask (SIG_BLOCK, &sigfd_set, 0);//D
2774 /*TODO: maybe unblock signal? */
2775 }
2776 else
2777#endif
1557 signal (w->signum, SIG_DFL); 2778 signal (w->signum, SIG_DFL);
1558}
1559 2779
2780 EV_FREQUENT_CHECK;
2781}
2782
1560void 2783void
1561ev_child_start (EV_P_ struct ev_child *w) 2784ev_child_start (EV_P_ ev_child *w)
1562{ 2785{
1563#if EV_MULTIPLICITY 2786#if EV_MULTIPLICITY
1564 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2787 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1565#endif 2788#endif
1566 if (ev_is_active (w)) 2789 if (expect_false (ev_is_active (w)))
1567 return; 2790 return;
1568 2791
2792 EV_FREQUENT_CHECK;
2793
1569 ev_start (EV_A_ (W)w, 1); 2794 ev_start (EV_A_ (W)w, 1);
1570 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2795 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1571}
1572 2796
2797 EV_FREQUENT_CHECK;
2798}
2799
1573void 2800void
1574ev_child_stop (EV_P_ struct ev_child *w) 2801ev_child_stop (EV_P_ ev_child *w)
1575{ 2802{
1576 ev_clear_pending (EV_A_ (W)w); 2803 clear_pending (EV_A_ (W)w);
1577 if (!ev_is_active (w)) 2804 if (expect_false (!ev_is_active (w)))
1578 return; 2805 return;
1579 2806
2807 EV_FREQUENT_CHECK;
2808
1580 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2809 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1581 ev_stop (EV_A_ (W)w); 2810 ev_stop (EV_A_ (W)w);
2811
2812 EV_FREQUENT_CHECK;
1582} 2813}
2814
2815#if EV_STAT_ENABLE
2816
2817# ifdef _WIN32
2818# undef lstat
2819# define lstat(a,b) _stati64 (a,b)
2820# endif
2821
2822#define DEF_STAT_INTERVAL 5.0074891
2823#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2824#define MIN_STAT_INTERVAL 0.1074891
2825
2826static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2827
2828#if EV_USE_INOTIFY
2829# define EV_INOTIFY_BUFSIZE 8192
2830
2831static void noinline
2832infy_add (EV_P_ ev_stat *w)
2833{
2834 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);
2835
2836 if (w->wd < 0)
2837 {
2838 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2839 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2840
2841 /* monitor some parent directory for speedup hints */
2842 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2843 /* but an efficiency issue only */
2844 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2845 {
2846 char path [4096];
2847 strcpy (path, w->path);
2848
2849 do
2850 {
2851 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2852 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2853
2854 char *pend = strrchr (path, '/');
2855
2856 if (!pend || pend == path)
2857 break;
2858
2859 *pend = 0;
2860 w->wd = inotify_add_watch (fs_fd, path, mask);
2861 }
2862 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2863 }
2864 }
2865
2866 if (w->wd >= 0)
2867 {
2868 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2869
2870 /* now local changes will be tracked by inotify, but remote changes won't */
2871 /* unless the filesystem it known to be local, we therefore still poll */
2872 /* also do poll on <2.6.25, but with normal frequency */
2873 struct statfs sfs;
2874
2875 if (fs_2625 && !statfs (w->path, &sfs))
2876 if (sfs.f_type == 0x1373 /* devfs */
2877 || sfs.f_type == 0xEF53 /* ext2/3 */
2878 || sfs.f_type == 0x3153464a /* jfs */
2879 || sfs.f_type == 0x52654973 /* reiser3 */
2880 || sfs.f_type == 0x01021994 /* tempfs */
2881 || sfs.f_type == 0x58465342 /* xfs */)
2882 return;
2883
2884 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2885 ev_timer_again (EV_A_ &w->timer);
2886 }
2887}
2888
2889static void noinline
2890infy_del (EV_P_ ev_stat *w)
2891{
2892 int slot;
2893 int wd = w->wd;
2894
2895 if (wd < 0)
2896 return;
2897
2898 w->wd = -2;
2899 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2900 wlist_del (&fs_hash [slot].head, (WL)w);
2901
2902 /* remove this watcher, if others are watching it, they will rearm */
2903 inotify_rm_watch (fs_fd, wd);
2904}
2905
2906static void noinline
2907infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2908{
2909 if (slot < 0)
2910 /* overflow, need to check for all hash slots */
2911 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2912 infy_wd (EV_A_ slot, wd, ev);
2913 else
2914 {
2915 WL w_;
2916
2917 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2918 {
2919 ev_stat *w = (ev_stat *)w_;
2920 w_ = w_->next; /* lets us remove this watcher and all before it */
2921
2922 if (w->wd == wd || wd == -1)
2923 {
2924 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2925 {
2926 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2927 w->wd = -1;
2928 infy_add (EV_A_ w); /* re-add, no matter what */
2929 }
2930
2931 stat_timer_cb (EV_A_ &w->timer, 0);
2932 }
2933 }
2934 }
2935}
2936
2937static void
2938infy_cb (EV_P_ ev_io *w, int revents)
2939{
2940 char buf [EV_INOTIFY_BUFSIZE];
2941 struct inotify_event *ev = (struct inotify_event *)buf;
2942 int ofs;
2943 int len = read (fs_fd, buf, sizeof (buf));
2944
2945 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2946 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2947}
2948
2949inline_size void
2950check_2625 (EV_P)
2951{
2952 /* kernels < 2.6.25 are borked
2953 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2954 */
2955 struct utsname buf;
2956 int major, minor, micro;
2957
2958 if (uname (&buf))
2959 return;
2960
2961 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2962 return;
2963
2964 if (major < 2
2965 || (major == 2 && minor < 6)
2966 || (major == 2 && minor == 6 && micro < 25))
2967 return;
2968
2969 fs_2625 = 1;
2970}
2971
2972inline_size void
2973infy_init (EV_P)
2974{
2975 if (fs_fd != -2)
2976 return;
2977
2978 fs_fd = -1;
2979
2980 check_2625 (EV_A);
2981
2982 fs_fd = inotify_init ();
2983
2984 if (fs_fd >= 0)
2985 {
2986 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2987 ev_set_priority (&fs_w, EV_MAXPRI);
2988 ev_io_start (EV_A_ &fs_w);
2989 }
2990}
2991
2992inline_size void
2993infy_fork (EV_P)
2994{
2995 int slot;
2996
2997 if (fs_fd < 0)
2998 return;
2999
3000 close (fs_fd);
3001 fs_fd = inotify_init ();
3002
3003 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
3004 {
3005 WL w_ = fs_hash [slot].head;
3006 fs_hash [slot].head = 0;
3007
3008 while (w_)
3009 {
3010 ev_stat *w = (ev_stat *)w_;
3011 w_ = w_->next; /* lets us add this watcher */
3012
3013 w->wd = -1;
3014
3015 if (fs_fd >= 0)
3016 infy_add (EV_A_ w); /* re-add, no matter what */
3017 else
3018 ev_timer_again (EV_A_ &w->timer);
3019 }
3020 }
3021}
3022
3023#endif
3024
3025#ifdef _WIN32
3026# define EV_LSTAT(p,b) _stati64 (p, b)
3027#else
3028# define EV_LSTAT(p,b) lstat (p, b)
3029#endif
3030
3031void
3032ev_stat_stat (EV_P_ ev_stat *w)
3033{
3034 if (lstat (w->path, &w->attr) < 0)
3035 w->attr.st_nlink = 0;
3036 else if (!w->attr.st_nlink)
3037 w->attr.st_nlink = 1;
3038}
3039
3040static void noinline
3041stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3042{
3043 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3044
3045 /* we copy this here each the time so that */
3046 /* prev has the old value when the callback gets invoked */
3047 w->prev = w->attr;
3048 ev_stat_stat (EV_A_ w);
3049
3050 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3051 if (
3052 w->prev.st_dev != w->attr.st_dev
3053 || w->prev.st_ino != w->attr.st_ino
3054 || w->prev.st_mode != w->attr.st_mode
3055 || w->prev.st_nlink != w->attr.st_nlink
3056 || w->prev.st_uid != w->attr.st_uid
3057 || w->prev.st_gid != w->attr.st_gid
3058 || w->prev.st_rdev != w->attr.st_rdev
3059 || w->prev.st_size != w->attr.st_size
3060 || w->prev.st_atime != w->attr.st_atime
3061 || w->prev.st_mtime != w->attr.st_mtime
3062 || w->prev.st_ctime != w->attr.st_ctime
3063 ) {
3064 #if EV_USE_INOTIFY
3065 if (fs_fd >= 0)
3066 {
3067 infy_del (EV_A_ w);
3068 infy_add (EV_A_ w);
3069 ev_stat_stat (EV_A_ w); /* avoid race... */
3070 }
3071 #endif
3072
3073 ev_feed_event (EV_A_ w, EV_STAT);
3074 }
3075}
3076
3077void
3078ev_stat_start (EV_P_ ev_stat *w)
3079{
3080 if (expect_false (ev_is_active (w)))
3081 return;
3082
3083 ev_stat_stat (EV_A_ w);
3084
3085 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3086 w->interval = MIN_STAT_INTERVAL;
3087
3088 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3089 ev_set_priority (&w->timer, ev_priority (w));
3090
3091#if EV_USE_INOTIFY
3092 infy_init (EV_A);
3093
3094 if (fs_fd >= 0)
3095 infy_add (EV_A_ w);
3096 else
3097#endif
3098 ev_timer_again (EV_A_ &w->timer);
3099
3100 ev_start (EV_A_ (W)w, 1);
3101
3102 EV_FREQUENT_CHECK;
3103}
3104
3105void
3106ev_stat_stop (EV_P_ ev_stat *w)
3107{
3108 clear_pending (EV_A_ (W)w);
3109 if (expect_false (!ev_is_active (w)))
3110 return;
3111
3112 EV_FREQUENT_CHECK;
3113
3114#if EV_USE_INOTIFY
3115 infy_del (EV_A_ w);
3116#endif
3117 ev_timer_stop (EV_A_ &w->timer);
3118
3119 ev_stop (EV_A_ (W)w);
3120
3121 EV_FREQUENT_CHECK;
3122}
3123#endif
3124
3125#if EV_IDLE_ENABLE
3126void
3127ev_idle_start (EV_P_ ev_idle *w)
3128{
3129 if (expect_false (ev_is_active (w)))
3130 return;
3131
3132 pri_adjust (EV_A_ (W)w);
3133
3134 EV_FREQUENT_CHECK;
3135
3136 {
3137 int active = ++idlecnt [ABSPRI (w)];
3138
3139 ++idleall;
3140 ev_start (EV_A_ (W)w, active);
3141
3142 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3143 idles [ABSPRI (w)][active - 1] = w;
3144 }
3145
3146 EV_FREQUENT_CHECK;
3147}
3148
3149void
3150ev_idle_stop (EV_P_ ev_idle *w)
3151{
3152 clear_pending (EV_A_ (W)w);
3153 if (expect_false (!ev_is_active (w)))
3154 return;
3155
3156 EV_FREQUENT_CHECK;
3157
3158 {
3159 int active = ev_active (w);
3160
3161 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3162 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3163
3164 ev_stop (EV_A_ (W)w);
3165 --idleall;
3166 }
3167
3168 EV_FREQUENT_CHECK;
3169}
3170#endif
3171
3172void
3173ev_prepare_start (EV_P_ ev_prepare *w)
3174{
3175 if (expect_false (ev_is_active (w)))
3176 return;
3177
3178 EV_FREQUENT_CHECK;
3179
3180 ev_start (EV_A_ (W)w, ++preparecnt);
3181 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3182 prepares [preparecnt - 1] = w;
3183
3184 EV_FREQUENT_CHECK;
3185}
3186
3187void
3188ev_prepare_stop (EV_P_ ev_prepare *w)
3189{
3190 clear_pending (EV_A_ (W)w);
3191 if (expect_false (!ev_is_active (w)))
3192 return;
3193
3194 EV_FREQUENT_CHECK;
3195
3196 {
3197 int active = ev_active (w);
3198
3199 prepares [active - 1] = prepares [--preparecnt];
3200 ev_active (prepares [active - 1]) = active;
3201 }
3202
3203 ev_stop (EV_A_ (W)w);
3204
3205 EV_FREQUENT_CHECK;
3206}
3207
3208void
3209ev_check_start (EV_P_ ev_check *w)
3210{
3211 if (expect_false (ev_is_active (w)))
3212 return;
3213
3214 EV_FREQUENT_CHECK;
3215
3216 ev_start (EV_A_ (W)w, ++checkcnt);
3217 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3218 checks [checkcnt - 1] = w;
3219
3220 EV_FREQUENT_CHECK;
3221}
3222
3223void
3224ev_check_stop (EV_P_ ev_check *w)
3225{
3226 clear_pending (EV_A_ (W)w);
3227 if (expect_false (!ev_is_active (w)))
3228 return;
3229
3230 EV_FREQUENT_CHECK;
3231
3232 {
3233 int active = ev_active (w);
3234
3235 checks [active - 1] = checks [--checkcnt];
3236 ev_active (checks [active - 1]) = active;
3237 }
3238
3239 ev_stop (EV_A_ (W)w);
3240
3241 EV_FREQUENT_CHECK;
3242}
3243
3244#if EV_EMBED_ENABLE
3245void noinline
3246ev_embed_sweep (EV_P_ ev_embed *w)
3247{
3248 ev_loop (w->other, EVLOOP_NONBLOCK);
3249}
3250
3251static void
3252embed_io_cb (EV_P_ ev_io *io, int revents)
3253{
3254 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3255
3256 if (ev_cb (w))
3257 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3258 else
3259 ev_loop (w->other, EVLOOP_NONBLOCK);
3260}
3261
3262static void
3263embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3264{
3265 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3266
3267 {
3268 struct ev_loop *loop = w->other;
3269
3270 while (fdchangecnt)
3271 {
3272 fd_reify (EV_A);
3273 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3274 }
3275 }
3276}
3277
3278static void
3279embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3280{
3281 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3282
3283 ev_embed_stop (EV_A_ w);
3284
3285 {
3286 struct ev_loop *loop = w->other;
3287
3288 ev_loop_fork (EV_A);
3289 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3290 }
3291
3292 ev_embed_start (EV_A_ w);
3293}
3294
3295#if 0
3296static void
3297embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3298{
3299 ev_idle_stop (EV_A_ idle);
3300}
3301#endif
3302
3303void
3304ev_embed_start (EV_P_ ev_embed *w)
3305{
3306 if (expect_false (ev_is_active (w)))
3307 return;
3308
3309 {
3310 struct ev_loop *loop = w->other;
3311 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3312 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3313 }
3314
3315 EV_FREQUENT_CHECK;
3316
3317 ev_set_priority (&w->io, ev_priority (w));
3318 ev_io_start (EV_A_ &w->io);
3319
3320 ev_prepare_init (&w->prepare, embed_prepare_cb);
3321 ev_set_priority (&w->prepare, EV_MINPRI);
3322 ev_prepare_start (EV_A_ &w->prepare);
3323
3324 ev_fork_init (&w->fork, embed_fork_cb);
3325 ev_fork_start (EV_A_ &w->fork);
3326
3327 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3328
3329 ev_start (EV_A_ (W)w, 1);
3330
3331 EV_FREQUENT_CHECK;
3332}
3333
3334void
3335ev_embed_stop (EV_P_ ev_embed *w)
3336{
3337 clear_pending (EV_A_ (W)w);
3338 if (expect_false (!ev_is_active (w)))
3339 return;
3340
3341 EV_FREQUENT_CHECK;
3342
3343 ev_io_stop (EV_A_ &w->io);
3344 ev_prepare_stop (EV_A_ &w->prepare);
3345 ev_fork_stop (EV_A_ &w->fork);
3346
3347 EV_FREQUENT_CHECK;
3348}
3349#endif
3350
3351#if EV_FORK_ENABLE
3352void
3353ev_fork_start (EV_P_ ev_fork *w)
3354{
3355 if (expect_false (ev_is_active (w)))
3356 return;
3357
3358 EV_FREQUENT_CHECK;
3359
3360 ev_start (EV_A_ (W)w, ++forkcnt);
3361 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3362 forks [forkcnt - 1] = w;
3363
3364 EV_FREQUENT_CHECK;
3365}
3366
3367void
3368ev_fork_stop (EV_P_ ev_fork *w)
3369{
3370 clear_pending (EV_A_ (W)w);
3371 if (expect_false (!ev_is_active (w)))
3372 return;
3373
3374 EV_FREQUENT_CHECK;
3375
3376 {
3377 int active = ev_active (w);
3378
3379 forks [active - 1] = forks [--forkcnt];
3380 ev_active (forks [active - 1]) = active;
3381 }
3382
3383 ev_stop (EV_A_ (W)w);
3384
3385 EV_FREQUENT_CHECK;
3386}
3387#endif
3388
3389#if EV_ASYNC_ENABLE
3390void
3391ev_async_start (EV_P_ ev_async *w)
3392{
3393 if (expect_false (ev_is_active (w)))
3394 return;
3395
3396 evpipe_init (EV_A);
3397
3398 EV_FREQUENT_CHECK;
3399
3400 ev_start (EV_A_ (W)w, ++asynccnt);
3401 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3402 asyncs [asynccnt - 1] = w;
3403
3404 EV_FREQUENT_CHECK;
3405}
3406
3407void
3408ev_async_stop (EV_P_ ev_async *w)
3409{
3410 clear_pending (EV_A_ (W)w);
3411 if (expect_false (!ev_is_active (w)))
3412 return;
3413
3414 EV_FREQUENT_CHECK;
3415
3416 {
3417 int active = ev_active (w);
3418
3419 asyncs [active - 1] = asyncs [--asynccnt];
3420 ev_active (asyncs [active - 1]) = active;
3421 }
3422
3423 ev_stop (EV_A_ (W)w);
3424
3425 EV_FREQUENT_CHECK;
3426}
3427
3428void
3429ev_async_send (EV_P_ ev_async *w)
3430{
3431 w->sent = 1;
3432 evpipe_write (EV_A_ &gotasync);
3433}
3434#endif
1583 3435
1584/*****************************************************************************/ 3436/*****************************************************************************/
1585 3437
1586struct ev_once 3438struct ev_once
1587{ 3439{
1588 struct ev_io io; 3440 ev_io io;
1589 struct ev_timer to; 3441 ev_timer to;
1590 void (*cb)(int revents, void *arg); 3442 void (*cb)(int revents, void *arg);
1591 void *arg; 3443 void *arg;
1592}; 3444};
1593 3445
1594static void 3446static void
1595once_cb (EV_P_ struct ev_once *once, int revents) 3447once_cb (EV_P_ struct ev_once *once, int revents)
1596{ 3448{
1597 void (*cb)(int revents, void *arg) = once->cb; 3449 void (*cb)(int revents, void *arg) = once->cb;
1598 void *arg = once->arg; 3450 void *arg = once->arg;
1599 3451
1600 ev_io_stop (EV_A_ &once->io); 3452 ev_io_stop (EV_A_ &once->io);
1601 ev_timer_stop (EV_A_ &once->to); 3453 ev_timer_stop (EV_A_ &once->to);
1602 ev_free (once); 3454 ev_free (once);
1603 3455
1604 cb (revents, arg); 3456 cb (revents, arg);
1605} 3457}
1606 3458
1607static void 3459static void
1608once_cb_io (EV_P_ struct ev_io *w, int revents) 3460once_cb_io (EV_P_ ev_io *w, int revents)
1609{ 3461{
1610 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3462 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3463
3464 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1611} 3465}
1612 3466
1613static void 3467static void
1614once_cb_to (EV_P_ struct ev_timer *w, int revents) 3468once_cb_to (EV_P_ ev_timer *w, int revents)
1615{ 3469{
1616 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3470 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3471
3472 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1617} 3473}
1618 3474
1619void 3475void
1620ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3476ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1621{ 3477{
1622 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3478 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1623 3479
1624 if (!once) 3480 if (expect_false (!once))
3481 {
1625 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3482 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1626 else 3483 return;
1627 { 3484 }
3485
1628 once->cb = cb; 3486 once->cb = cb;
1629 once->arg = arg; 3487 once->arg = arg;
1630 3488
1631 ev_init (&once->io, once_cb_io); 3489 ev_init (&once->io, once_cb_io);
1632 if (fd >= 0) 3490 if (fd >= 0)
3491 {
3492 ev_io_set (&once->io, fd, events);
3493 ev_io_start (EV_A_ &once->io);
3494 }
3495
3496 ev_init (&once->to, once_cb_to);
3497 if (timeout >= 0.)
3498 {
3499 ev_timer_set (&once->to, timeout, 0.);
3500 ev_timer_start (EV_A_ &once->to);
3501 }
3502}
3503
3504/*****************************************************************************/
3505
3506#if EV_WALK_ENABLE
3507void
3508ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3509{
3510 int i, j;
3511 ev_watcher_list *wl, *wn;
3512
3513 if (types & (EV_IO | EV_EMBED))
3514 for (i = 0; i < anfdmax; ++i)
3515 for (wl = anfds [i].head; wl; )
1633 { 3516 {
1634 ev_io_set (&once->io, fd, events); 3517 wn = wl->next;
1635 ev_io_start (EV_A_ &once->io); 3518
3519#if EV_EMBED_ENABLE
3520 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3521 {
3522 if (types & EV_EMBED)
3523 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3524 }
3525 else
3526#endif
3527#if EV_USE_INOTIFY
3528 if (ev_cb ((ev_io *)wl) == infy_cb)
3529 ;
3530 else
3531#endif
3532 if ((ev_io *)wl != &pipe_w)
3533 if (types & EV_IO)
3534 cb (EV_A_ EV_IO, wl);
3535
3536 wl = wn;
1636 } 3537 }
1637 3538
1638 ev_init (&once->to, once_cb_to); 3539 if (types & (EV_TIMER | EV_STAT))
1639 if (timeout >= 0.) 3540 for (i = timercnt + HEAP0; i-- > HEAP0; )
3541#if EV_STAT_ENABLE
3542 /*TODO: timer is not always active*/
3543 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1640 { 3544 {
1641 ev_timer_set (&once->to, timeout, 0.); 3545 if (types & EV_STAT)
1642 ev_timer_start (EV_A_ &once->to); 3546 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1643 } 3547 }
1644 } 3548 else
3549#endif
3550 if (types & EV_TIMER)
3551 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3552
3553#if EV_PERIODIC_ENABLE
3554 if (types & EV_PERIODIC)
3555 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3556 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3557#endif
3558
3559#if EV_IDLE_ENABLE
3560 if (types & EV_IDLE)
3561 for (j = NUMPRI; i--; )
3562 for (i = idlecnt [j]; i--; )
3563 cb (EV_A_ EV_IDLE, idles [j][i]);
3564#endif
3565
3566#if EV_FORK_ENABLE
3567 if (types & EV_FORK)
3568 for (i = forkcnt; i--; )
3569 if (ev_cb (forks [i]) != embed_fork_cb)
3570 cb (EV_A_ EV_FORK, forks [i]);
3571#endif
3572
3573#if EV_ASYNC_ENABLE
3574 if (types & EV_ASYNC)
3575 for (i = asynccnt; i--; )
3576 cb (EV_A_ EV_ASYNC, asyncs [i]);
3577#endif
3578
3579 if (types & EV_PREPARE)
3580 for (i = preparecnt; i--; )
3581#if EV_EMBED_ENABLE
3582 if (ev_cb (prepares [i]) != embed_prepare_cb)
3583#endif
3584 cb (EV_A_ EV_PREPARE, prepares [i]);
3585
3586 if (types & EV_CHECK)
3587 for (i = checkcnt; i--; )
3588 cb (EV_A_ EV_CHECK, checks [i]);
3589
3590 if (types & EV_SIGNAL)
3591 for (i = 0; i < signalmax; ++i)
3592 for (wl = signals [i].head; wl; )
3593 {
3594 wn = wl->next;
3595 cb (EV_A_ EV_SIGNAL, wl);
3596 wl = wn;
3597 }
3598
3599 if (types & EV_CHILD)
3600 for (i = EV_PID_HASHSIZE; i--; )
3601 for (wl = childs [i]; wl; )
3602 {
3603 wn = wl->next;
3604 cb (EV_A_ EV_CHILD, wl);
3605 wl = wn;
3606 }
3607/* EV_STAT 0x00001000 /* stat data changed */
3608/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
1645} 3609}
3610#endif
3611
3612#if EV_MULTIPLICITY
3613 #include "ev_wrap.h"
3614#endif
1646 3615
1647#ifdef __cplusplus 3616#ifdef __cplusplus
1648} 3617}
1649#endif 3618#endif
1650 3619

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