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Comparing libev/ev.c (file contents):
Revision 1.83 by root, Fri Nov 9 21:48:23 2007 UTC vs.
Revision 1.296 by root, Thu Jul 9 09:11:20 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 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
31#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
32# 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
33 65
34# if HAVE_CLOCK_GETTIME 66# if HAVE_CLOCK_GETTIME
67# ifndef EV_USE_MONOTONIC
35# define EV_USE_MONOTONIC 1 68# define EV_USE_MONOTONIC 1
69# endif
70# ifndef EV_USE_REALTIME
36# 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
79# endif
37# endif 80# endif
38 81
39# if HAVE_SELECT && HAVE_SYS_SELECT_H 82# ifndef EV_USE_NANOSLEEP
83# if HAVE_NANOSLEEP
40# define EV_USE_SELECT 1 84# define EV_USE_NANOSLEEP 1
85# else
86# define EV_USE_NANOSLEEP 0
87# endif
41# endif 88# endif
42 89
43# if HAVE_POLL && HAVE_POLL_H 90# ifndef EV_USE_SELECT
91# if HAVE_SELECT && HAVE_SYS_SELECT_H
44# define EV_USE_POLL 1 92# define EV_USE_SELECT 1
93# else
94# define EV_USE_SELECT 0
95# endif
45# endif 96# endif
46 97
47# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 98# ifndef EV_USE_POLL
99# if HAVE_POLL && HAVE_POLL_H
48# define EV_USE_EPOLL 1 100# define EV_USE_POLL 1
101# else
102# define EV_USE_POLL 0
103# endif
49# endif 104# endif
50 105
51# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 106# ifndef EV_USE_EPOLL
107# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
52# define EV_USE_KQUEUE 1 108# define EV_USE_EPOLL 1
109# else
110# define EV_USE_EPOLL 0
111# endif
53# 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
54 129
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_EVENTFD
139# if HAVE_EVENTFD
140# define EV_USE_EVENTFD 1
141# else
142# define EV_USE_EVENTFD 0
143# endif
144# endif
145
55#endif 146#endif
56 147
57#include <math.h> 148#include <math.h>
58#include <stdlib.h> 149#include <stdlib.h>
59#include <fcntl.h> 150#include <fcntl.h>
… …
66#include <sys/types.h> 157#include <sys/types.h>
67#include <time.h> 158#include <time.h>
68 159
69#include <signal.h> 160#include <signal.h>
70 161
71#ifndef WIN32
72# include <unistd.h>
73# include <sys/time.h>
74# include <sys/wait.h>
75#endif
76/**/
77
78#ifndef EV_USE_MONOTONIC
79# define EV_USE_MONOTONIC 1
80#endif
81
82#ifndef EV_USE_SELECT
83# define EV_USE_SELECT 1
84#endif
85
86#ifndef EV_USE_POLL
87# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
88#endif
89
90#ifndef EV_USE_EPOLL
91# define EV_USE_EPOLL 0
92#endif
93
94#ifndef EV_USE_KQUEUE
95# define EV_USE_KQUEUE 0
96#endif
97
98#ifndef EV_USE_WIN32
99# ifdef WIN32
100# define EV_USE_WIN32 0 /* it does not exist, use select */
101# undef EV_USE_SELECT
102# define EV_USE_SELECT 1
103# else
104# define EV_USE_WIN32 0
105# endif
106#endif
107
108#ifndef EV_USE_REALTIME
109# define EV_USE_REALTIME 1
110#endif
111
112/**/
113
114#ifndef CLOCK_MONOTONIC
115# undef EV_USE_MONOTONIC
116# define EV_USE_MONOTONIC 0
117#endif
118
119#ifndef CLOCK_REALTIME
120# undef EV_USE_REALTIME
121# define EV_USE_REALTIME 0
122#endif
123
124/**/
125
126#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
127#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
128#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
129/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
130
131#ifdef EV_H 162#ifdef EV_H
132# include EV_H 163# include EV_H
133#else 164#else
134# include "ev.h" 165# include "ev.h"
135#endif 166#endif
136 167
168#ifndef _WIN32
169# include <sys/time.h>
170# include <sys/wait.h>
171# include <unistd.h>
172#else
173# include <io.h>
174# define WIN32_LEAN_AND_MEAN
175# include <windows.h>
176# ifndef EV_SELECT_IS_WINSOCKET
177# define EV_SELECT_IS_WINSOCKET 1
178# endif
179#endif
180
181/* this block tries to deduce configuration from header-defined symbols and defaults */
182
183#ifndef EV_USE_CLOCK_SYSCALL
184# if __linux && __GLIBC__ >= 2
185# define EV_USE_CLOCK_SYSCALL 1
186# else
187# define EV_USE_CLOCK_SYSCALL 0
188# endif
189#endif
190
191#ifndef EV_USE_MONOTONIC
192# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
193# define EV_USE_MONOTONIC 1
194# else
195# define EV_USE_MONOTONIC 0
196# endif
197#endif
198
199#ifndef EV_USE_REALTIME
200# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
201#endif
202
203#ifndef EV_USE_NANOSLEEP
204# if _POSIX_C_SOURCE >= 199309L
205# define EV_USE_NANOSLEEP 1
206# else
207# define EV_USE_NANOSLEEP 0
208# endif
209#endif
210
211#ifndef EV_USE_SELECT
212# define EV_USE_SELECT 1
213#endif
214
215#ifndef EV_USE_POLL
216# ifdef _WIN32
217# define EV_USE_POLL 0
218# else
219# define EV_USE_POLL 1
220# endif
221#endif
222
223#ifndef EV_USE_EPOLL
224# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
225# define EV_USE_EPOLL 1
226# else
227# define EV_USE_EPOLL 0
228# endif
229#endif
230
231#ifndef EV_USE_KQUEUE
232# define EV_USE_KQUEUE 0
233#endif
234
235#ifndef EV_USE_PORT
236# define EV_USE_PORT 0
237#endif
238
239#ifndef EV_USE_INOTIFY
240# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
241# define EV_USE_INOTIFY 1
242# else
243# define EV_USE_INOTIFY 0
244# endif
245#endif
246
247#ifndef EV_PID_HASHSIZE
248# if EV_MINIMAL
249# define EV_PID_HASHSIZE 1
250# else
251# define EV_PID_HASHSIZE 16
252# endif
253#endif
254
255#ifndef EV_INOTIFY_HASHSIZE
256# if EV_MINIMAL
257# define EV_INOTIFY_HASHSIZE 1
258# else
259# define EV_INOTIFY_HASHSIZE 16
260# endif
261#endif
262
263#ifndef EV_USE_EVENTFD
264# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
265# define EV_USE_EVENTFD 1
266# else
267# define EV_USE_EVENTFD 0
268# endif
269#endif
270
271#if 0 /* debugging */
272# define EV_VERIFY 3
273# define EV_USE_4HEAP 1
274# define EV_HEAP_CACHE_AT 1
275#endif
276
277#ifndef EV_VERIFY
278# define EV_VERIFY !EV_MINIMAL
279#endif
280
281#ifndef EV_USE_4HEAP
282# define EV_USE_4HEAP !EV_MINIMAL
283#endif
284
285#ifndef EV_HEAP_CACHE_AT
286# define EV_HEAP_CACHE_AT !EV_MINIMAL
287#endif
288
289/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
290/* which makes programs even slower. might work on other unices, too. */
291#if EV_USE_CLOCK_SYSCALL
292# include <syscall.h>
293# ifdef SYS_clock_gettime
294# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
295# undef EV_USE_MONOTONIC
296# define EV_USE_MONOTONIC 1
297# else
298# undef EV_USE_CLOCK_SYSCALL
299# define EV_USE_CLOCK_SYSCALL 0
300# endif
301#endif
302
303/* this block fixes any misconfiguration where we know we run into trouble otherwise */
304
305#ifndef CLOCK_MONOTONIC
306# undef EV_USE_MONOTONIC
307# define EV_USE_MONOTONIC 0
308#endif
309
310#ifndef CLOCK_REALTIME
311# undef EV_USE_REALTIME
312# define EV_USE_REALTIME 0
313#endif
314
315#if !EV_STAT_ENABLE
316# undef EV_USE_INOTIFY
317# define EV_USE_INOTIFY 0
318#endif
319
320#if !EV_USE_NANOSLEEP
321# ifndef _WIN32
322# include <sys/select.h>
323# endif
324#endif
325
326#if EV_USE_INOTIFY
327# include <sys/utsname.h>
328# include <sys/statfs.h>
329# include <sys/inotify.h>
330/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
331# ifndef IN_DONT_FOLLOW
332# undef EV_USE_INOTIFY
333# define EV_USE_INOTIFY 0
334# endif
335#endif
336
337#if EV_SELECT_IS_WINSOCKET
338# include <winsock.h>
339#endif
340
341#if EV_USE_EVENTFD
342/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
343# include <stdint.h>
344# ifdef __cplusplus
345extern "C" {
346# endif
347int eventfd (unsigned int initval, int flags);
348# ifdef __cplusplus
349}
350# endif
351#endif
352
353/**/
354
355#if EV_VERIFY >= 3
356# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
357#else
358# define EV_FREQUENT_CHECK do { } while (0)
359#endif
360
361/*
362 * This is used to avoid floating point rounding problems.
363 * It is added to ev_rt_now when scheduling periodics
364 * to ensure progress, time-wise, even when rounding
365 * errors are against us.
366 * This value is good at least till the year 4000.
367 * Better solutions welcome.
368 */
369#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
370
371#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
372#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
373/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
374
137#if __GNUC__ >= 3 375#if __GNUC__ >= 4
138# define expect(expr,value) __builtin_expect ((expr),(value)) 376# define expect(expr,value) __builtin_expect ((expr),(value))
139# define inline inline 377# define noinline __attribute__ ((noinline))
140#else 378#else
141# define expect(expr,value) (expr) 379# define expect(expr,value) (expr)
142# define inline static 380# define noinline
381# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
382# define inline
383# endif
143#endif 384#endif
144 385
145#define expect_false(expr) expect ((expr) != 0, 0) 386#define expect_false(expr) expect ((expr) != 0, 0)
146#define expect_true(expr) expect ((expr) != 0, 1) 387#define expect_true(expr) expect ((expr) != 0, 1)
388#define inline_size static inline
147 389
390#if EV_MINIMAL
391# define inline_speed static noinline
392#else
393# define inline_speed static inline
394#endif
395
148#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 396#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
397
398#if EV_MINPRI == EV_MAXPRI
399# define ABSPRI(w) (((W)w), 0)
400#else
149#define ABSPRI(w) ((w)->priority - EV_MINPRI) 401# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
402#endif
150 403
404#define EMPTY /* required for microsofts broken pseudo-c compiler */
405#define EMPTY2(a,b) /* used to suppress some warnings */
406
151typedef struct ev_watcher *W; 407typedef ev_watcher *W;
152typedef struct ev_watcher_list *WL; 408typedef ev_watcher_list *WL;
153typedef struct ev_watcher_time *WT; 409typedef ev_watcher_time *WT;
154 410
411#define ev_active(w) ((W)(w))->active
412#define ev_at(w) ((WT)(w))->at
413
414#if EV_USE_REALTIME
415/* sig_atomic_t is used to avoid per-thread variables or locking but still */
416/* giving it a reasonably high chance of working on typical architetcures */
417static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
418#endif
419
420#if EV_USE_MONOTONIC
155static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 421static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
422#endif
156 423
424#ifdef _WIN32
157#include "ev_win32.c" 425# include "ev_win32.c"
426#endif
158 427
159/*****************************************************************************/ 428/*****************************************************************************/
160 429
161static void (*syserr_cb)(const char *msg); 430static void (*syserr_cb)(const char *msg);
162 431
432void
163void ev_set_syserr_cb (void (*cb)(const char *msg)) 433ev_set_syserr_cb (void (*cb)(const char *msg))
164{ 434{
165 syserr_cb = cb; 435 syserr_cb = cb;
166} 436}
167 437
168static void 438static void noinline
169syserr (const char *msg) 439ev_syserr (const char *msg)
170{ 440{
171 if (!msg) 441 if (!msg)
172 msg = "(libev) system error"; 442 msg = "(libev) system error";
173 443
174 if (syserr_cb) 444 if (syserr_cb)
… …
178 perror (msg); 448 perror (msg);
179 abort (); 449 abort ();
180 } 450 }
181} 451}
182 452
453static void *
454ev_realloc_emul (void *ptr, long size)
455{
456 /* some systems, notably openbsd and darwin, fail to properly
457 * implement realloc (x, 0) (as required by both ansi c-98 and
458 * the single unix specification, so work around them here.
459 */
460
461 if (size)
462 return realloc (ptr, size);
463
464 free (ptr);
465 return 0;
466}
467
183static void *(*alloc)(void *ptr, long size); 468static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
184 469
470void
185void ev_set_allocator (void *(*cb)(void *ptr, long size)) 471ev_set_allocator (void *(*cb)(void *ptr, long size))
186{ 472{
187 alloc = cb; 473 alloc = cb;
188} 474}
189 475
190static void * 476inline_speed void *
191ev_realloc (void *ptr, long size) 477ev_realloc (void *ptr, long size)
192{ 478{
193 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 479 ptr = alloc (ptr, size);
194 480
195 if (!ptr && size) 481 if (!ptr && size)
196 { 482 {
197 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 483 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
198 abort (); 484 abort ();
… …
204#define ev_malloc(size) ev_realloc (0, (size)) 490#define ev_malloc(size) ev_realloc (0, (size))
205#define ev_free(ptr) ev_realloc ((ptr), 0) 491#define ev_free(ptr) ev_realloc ((ptr), 0)
206 492
207/*****************************************************************************/ 493/*****************************************************************************/
208 494
495/* file descriptor info structure */
209typedef struct 496typedef struct
210{ 497{
211 WL head; 498 WL head;
212 unsigned char events; 499 unsigned char events; /* the events watched for */
500 unsigned char reify; /* flag set when this ANFD needs reification */
501 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
213 unsigned char reify; 502 unsigned char unused;
503#if EV_USE_EPOLL
504 unsigned int egen; /* generation counter to counter epoll bugs */
505#endif
506#if EV_SELECT_IS_WINSOCKET
507 SOCKET handle;
508#endif
214} ANFD; 509} ANFD;
215 510
511/* stores the pending event set for a given watcher */
216typedef struct 512typedef struct
217{ 513{
218 W w; 514 W w;
219 int events; 515 int events; /* the pending event set for the given watcher */
220} ANPENDING; 516} ANPENDING;
517
518#if EV_USE_INOTIFY
519/* hash table entry per inotify-id */
520typedef struct
521{
522 WL head;
523} ANFS;
524#endif
525
526/* Heap Entry */
527#if EV_HEAP_CACHE_AT
528 /* a heap element */
529 typedef struct {
530 ev_tstamp at;
531 WT w;
532 } ANHE;
533
534 #define ANHE_w(he) (he).w /* access watcher, read-write */
535 #define ANHE_at(he) (he).at /* access cached at, read-only */
536 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
537#else
538 /* a heap element */
539 typedef WT ANHE;
540
541 #define ANHE_w(he) (he)
542 #define ANHE_at(he) (he)->at
543 #define ANHE_at_cache(he)
544#endif
221 545
222#if EV_MULTIPLICITY 546#if EV_MULTIPLICITY
223 547
224 struct ev_loop 548 struct ev_loop
225 { 549 {
550 ev_tstamp ev_rt_now;
551 #define ev_rt_now ((loop)->ev_rt_now)
226 #define VAR(name,decl) decl; 552 #define VAR(name,decl) decl;
227 #include "ev_vars.h" 553 #include "ev_vars.h"
228 #undef VAR 554 #undef VAR
229 }; 555 };
230 #include "ev_wrap.h" 556 #include "ev_wrap.h"
231 557
232 struct ev_loop default_loop_struct; 558 static struct ev_loop default_loop_struct;
233 static struct ev_loop *default_loop; 559 struct ev_loop *ev_default_loop_ptr;
234 560
235#else 561#else
236 562
563 ev_tstamp ev_rt_now;
237 #define VAR(name,decl) static decl; 564 #define VAR(name,decl) static decl;
238 #include "ev_vars.h" 565 #include "ev_vars.h"
239 #undef VAR 566 #undef VAR
240 567
241 static int default_loop; 568 static int ev_default_loop_ptr;
242 569
243#endif 570#endif
244 571
245/*****************************************************************************/ 572/*****************************************************************************/
246 573
247inline ev_tstamp 574#ifndef EV_HAVE_EV_TIME
575ev_tstamp
248ev_time (void) 576ev_time (void)
249{ 577{
250#if EV_USE_REALTIME 578#if EV_USE_REALTIME
579 if (expect_true (have_realtime))
580 {
251 struct timespec ts; 581 struct timespec ts;
252 clock_gettime (CLOCK_REALTIME, &ts); 582 clock_gettime (CLOCK_REALTIME, &ts);
253 return ts.tv_sec + ts.tv_nsec * 1e-9; 583 return ts.tv_sec + ts.tv_nsec * 1e-9;
254#else 584 }
585#endif
586
255 struct timeval tv; 587 struct timeval tv;
256 gettimeofday (&tv, 0); 588 gettimeofday (&tv, 0);
257 return tv.tv_sec + tv.tv_usec * 1e-6; 589 return tv.tv_sec + tv.tv_usec * 1e-6;
258#endif
259} 590}
591#endif
260 592
261inline ev_tstamp 593inline_size ev_tstamp
262get_clock (void) 594get_clock (void)
263{ 595{
264#if EV_USE_MONOTONIC 596#if EV_USE_MONOTONIC
265 if (expect_true (have_monotonic)) 597 if (expect_true (have_monotonic))
266 { 598 {
… …
271#endif 603#endif
272 604
273 return ev_time (); 605 return ev_time ();
274} 606}
275 607
608#if EV_MULTIPLICITY
276ev_tstamp 609ev_tstamp
277ev_now (EV_P) 610ev_now (EV_P)
278{ 611{
279 return rt_now; 612 return ev_rt_now;
280} 613}
614#endif
281 615
282#define array_roundsize(type,n) ((n) | 4 & ~3) 616void
617ev_sleep (ev_tstamp delay)
618{
619 if (delay > 0.)
620 {
621#if EV_USE_NANOSLEEP
622 struct timespec ts;
623
624 ts.tv_sec = (time_t)delay;
625 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
626
627 nanosleep (&ts, 0);
628#elif defined(_WIN32)
629 Sleep ((unsigned long)(delay * 1e3));
630#else
631 struct timeval tv;
632
633 tv.tv_sec = (time_t)delay;
634 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
635
636 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
637 /* somehting not guaranteed by newer posix versions, but guaranteed */
638 /* by older ones */
639 select (0, 0, 0, 0, &tv);
640#endif
641 }
642}
643
644/*****************************************************************************/
645
646#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
647
648/* find a suitable new size for the given array, */
649/* hopefully by rounding to a ncie-to-malloc size */
650inline_size int
651array_nextsize (int elem, int cur, int cnt)
652{
653 int ncur = cur + 1;
654
655 do
656 ncur <<= 1;
657 while (cnt > ncur);
658
659 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
660 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
661 {
662 ncur *= elem;
663 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
664 ncur = ncur - sizeof (void *) * 4;
665 ncur /= elem;
666 }
667
668 return ncur;
669}
670
671static noinline void *
672array_realloc (int elem, void *base, int *cur, int cnt)
673{
674 *cur = array_nextsize (elem, *cur, cnt);
675 return ev_realloc (base, elem * *cur);
676}
677
678#define array_init_zero(base,count) \
679 memset ((void *)(base), 0, sizeof (*(base)) * (count))
283 680
284#define array_needsize(type,base,cur,cnt,init) \ 681#define array_needsize(type,base,cur,cnt,init) \
285 if (expect_false ((cnt) > cur)) \ 682 if (expect_false ((cnt) > (cur))) \
286 { \ 683 { \
287 int newcnt = cur; \ 684 int ocur_ = (cur); \
288 do \ 685 (base) = (type *)array_realloc \
289 { \ 686 (sizeof (type), (base), &(cur), (cnt)); \
290 newcnt = array_roundsize (type, newcnt << 1); \ 687 init ((base) + (ocur_), (cur) - ocur_); \
291 } \
292 while ((cnt) > newcnt); \
293 \
294 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
295 init (base + cur, newcnt - cur); \
296 cur = newcnt; \
297 } 688 }
298 689
690#if 0
299#define array_slim(type,stem) \ 691#define array_slim(type,stem) \
300 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 692 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
301 { \ 693 { \
302 stem ## max = array_roundsize (stem ## cnt >> 1); \ 694 stem ## max = array_roundsize (stem ## cnt >> 1); \
303 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 695 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
304 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 696 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
305 } 697 }
306 698#endif
307/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
308/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
309#define array_free_microshit(stem) \
310 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
311 699
312#define array_free(stem, idx) \ 700#define array_free(stem, idx) \
313 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 701 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
314 702
315/*****************************************************************************/ 703/*****************************************************************************/
316 704
317static void 705/* dummy callback for pending events */
318anfds_init (ANFD *base, int count) 706static void noinline
707pendingcb (EV_P_ ev_prepare *w, int revents)
319{ 708{
320 while (count--)
321 {
322 base->head = 0;
323 base->events = EV_NONE;
324 base->reify = 0;
325
326 ++base;
327 }
328} 709}
329 710
330void 711void noinline
331ev_feed_event (EV_P_ void *w, int revents) 712ev_feed_event (EV_P_ void *w, int revents)
332{ 713{
333 W w_ = (W)w; 714 W w_ = (W)w;
715 int pri = ABSPRI (w_);
334 716
335 if (w_->pending) 717 if (expect_false (w_->pending))
718 pendings [pri][w_->pending - 1].events |= revents;
719 else
336 { 720 {
721 w_->pending = ++pendingcnt [pri];
722 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
723 pendings [pri][w_->pending - 1].w = w_;
337 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 724 pendings [pri][w_->pending - 1].events = revents;
338 return;
339 } 725 }
340
341 w_->pending = ++pendingcnt [ABSPRI (w_)];
342 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
343 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
344 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
345} 726}
346 727
347static void 728inline_speed void
729feed_reverse (EV_P_ W w)
730{
731 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
732 rfeeds [rfeedcnt++] = w;
733}
734
735inline_size void
736feed_reverse_done (EV_P_ int revents)
737{
738 do
739 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
740 while (rfeedcnt);
741}
742
743inline_speed void
348queue_events (EV_P_ W *events, int eventcnt, int type) 744queue_events (EV_P_ W *events, int eventcnt, int type)
349{ 745{
350 int i; 746 int i;
351 747
352 for (i = 0; i < eventcnt; ++i) 748 for (i = 0; i < eventcnt; ++i)
353 ev_feed_event (EV_A_ events [i], type); 749 ev_feed_event (EV_A_ events [i], type);
354} 750}
355 751
752/*****************************************************************************/
753
356inline void 754inline_speed void
357fd_event (EV_P_ int fd, int revents) 755fd_event (EV_P_ int fd, int revents)
358{ 756{
359 ANFD *anfd = anfds + fd; 757 ANFD *anfd = anfds + fd;
360 struct ev_io *w; 758 ev_io *w;
361 759
362 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 760 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
363 { 761 {
364 int ev = w->events & revents; 762 int ev = w->events & revents;
365 763
366 if (ev) 764 if (ev)
367 ev_feed_event (EV_A_ (W)w, ev); 765 ev_feed_event (EV_A_ (W)w, ev);
… …
369} 767}
370 768
371void 769void
372ev_feed_fd_event (EV_P_ int fd, int revents) 770ev_feed_fd_event (EV_P_ int fd, int revents)
373{ 771{
772 if (fd >= 0 && fd < anfdmax)
374 fd_event (EV_A_ fd, revents); 773 fd_event (EV_A_ fd, revents);
375} 774}
376 775
377/*****************************************************************************/ 776/* make sure the external fd watch events are in-sync */
378 777/* with the kernel/libev internal state */
379static void 778inline_size void
380fd_reify (EV_P) 779fd_reify (EV_P)
381{ 780{
382 int i; 781 int i;
383 782
384 for (i = 0; i < fdchangecnt; ++i) 783 for (i = 0; i < fdchangecnt; ++i)
385 { 784 {
386 int fd = fdchanges [i]; 785 int fd = fdchanges [i];
387 ANFD *anfd = anfds + fd; 786 ANFD *anfd = anfds + fd;
388 struct ev_io *w; 787 ev_io *w;
389 788
390 int events = 0; 789 unsigned char events = 0;
391 790
392 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 791 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
393 events |= w->events; 792 events |= (unsigned char)w->events;
394 793
794#if EV_SELECT_IS_WINSOCKET
795 if (events)
796 {
797 unsigned long arg;
798 #ifdef EV_FD_TO_WIN32_HANDLE
799 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
800 #else
801 anfd->handle = _get_osfhandle (fd);
802 #endif
803 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
804 }
805#endif
806
807 {
808 unsigned char o_events = anfd->events;
809 unsigned char o_reify = anfd->reify;
810
395 anfd->reify = 0; 811 anfd->reify = 0;
396
397 method_modify (EV_A_ fd, anfd->events, events);
398 anfd->events = events; 812 anfd->events = events;
813
814 if (o_events != events || o_reify & EV__IOFDSET)
815 backend_modify (EV_A_ fd, o_events, events);
816 }
399 } 817 }
400 818
401 fdchangecnt = 0; 819 fdchangecnt = 0;
402} 820}
403 821
404static void 822/* something about the given fd changed */
823inline_size void
405fd_change (EV_P_ int fd) 824fd_change (EV_P_ int fd, int flags)
406{ 825{
407 if (anfds [fd].reify) 826 unsigned char reify = anfds [fd].reify;
408 return;
409
410 anfds [fd].reify = 1; 827 anfds [fd].reify |= flags;
411 828
829 if (expect_true (!reify))
830 {
412 ++fdchangecnt; 831 ++fdchangecnt;
413 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); 832 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
414 fdchanges [fdchangecnt - 1] = fd; 833 fdchanges [fdchangecnt - 1] = fd;
834 }
415} 835}
416 836
417static void 837/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
838inline_speed void
418fd_kill (EV_P_ int fd) 839fd_kill (EV_P_ int fd)
419{ 840{
420 struct ev_io *w; 841 ev_io *w;
421 842
422 while ((w = (struct ev_io *)anfds [fd].head)) 843 while ((w = (ev_io *)anfds [fd].head))
423 { 844 {
424 ev_io_stop (EV_A_ w); 845 ev_io_stop (EV_A_ w);
425 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 846 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
426 } 847 }
427} 848}
428 849
429static int 850/* check whether the given fd is atcually valid, for error recovery */
851inline_size int
430fd_valid (int fd) 852fd_valid (int fd)
431{ 853{
432#ifdef WIN32 854#ifdef _WIN32
433 return !!win32_get_osfhandle (fd); 855 return _get_osfhandle (fd) != -1;
434#else 856#else
435 return fcntl (fd, F_GETFD) != -1; 857 return fcntl (fd, F_GETFD) != -1;
436#endif 858#endif
437} 859}
438 860
439/* called on EBADF to verify fds */ 861/* called on EBADF to verify fds */
440static void 862static void noinline
441fd_ebadf (EV_P) 863fd_ebadf (EV_P)
442{ 864{
443 int fd; 865 int fd;
444 866
445 for (fd = 0; fd < anfdmax; ++fd) 867 for (fd = 0; fd < anfdmax; ++fd)
446 if (anfds [fd].events) 868 if (anfds [fd].events)
447 if (!fd_valid (fd) == -1 && errno == EBADF) 869 if (!fd_valid (fd) && errno == EBADF)
448 fd_kill (EV_A_ fd); 870 fd_kill (EV_A_ fd);
449} 871}
450 872
451/* called on ENOMEM in select/poll to kill some fds and retry */ 873/* called on ENOMEM in select/poll to kill some fds and retry */
452static void 874static void noinline
453fd_enomem (EV_P) 875fd_enomem (EV_P)
454{ 876{
455 int fd; 877 int fd;
456 878
457 for (fd = anfdmax; fd--; ) 879 for (fd = anfdmax; fd--; )
… …
460 fd_kill (EV_A_ fd); 882 fd_kill (EV_A_ fd);
461 return; 883 return;
462 } 884 }
463} 885}
464 886
465/* usually called after fork if method needs to re-arm all fds from scratch */ 887/* usually called after fork if backend needs to re-arm all fds from scratch */
466static void 888static void noinline
467fd_rearm_all (EV_P) 889fd_rearm_all (EV_P)
468{ 890{
469 int fd; 891 int fd;
470 892
471 /* this should be highly optimised to not do anything but set a flag */
472 for (fd = 0; fd < anfdmax; ++fd) 893 for (fd = 0; fd < anfdmax; ++fd)
473 if (anfds [fd].events) 894 if (anfds [fd].events)
474 { 895 {
475 anfds [fd].events = 0; 896 anfds [fd].events = 0;
897 anfds [fd].emask = 0;
476 fd_change (EV_A_ fd); 898 fd_change (EV_A_ fd, EV__IOFDSET | 1);
477 } 899 }
478} 900}
479 901
480/*****************************************************************************/ 902/*****************************************************************************/
481 903
482static void 904/*
483upheap (WT *heap, int k) 905 * the heap functions want a real array index. array index 0 uis guaranteed to not
484{ 906 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
485 WT w = heap [k]; 907 * the branching factor of the d-tree.
908 */
486 909
487 while (k && heap [k >> 1]->at > w->at) 910/*
488 { 911 * at the moment we allow libev the luxury of two heaps,
489 heap [k] = heap [k >> 1]; 912 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
490 ((W)heap [k])->active = k + 1; 913 * which is more cache-efficient.
491 k >>= 1; 914 * the difference is about 5% with 50000+ watchers.
492 } 915 */
916#if EV_USE_4HEAP
493 917
494 heap [k] = w; 918#define DHEAP 4
495 ((W)heap [k])->active = k + 1; 919#define HEAP0 (DHEAP - 1) /* index of first element in heap */
920#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
921#define UPHEAP_DONE(p,k) ((p) == (k))
496 922
497} 923/* away from the root */
498 924inline_speed void
499static void
500downheap (WT *heap, int N, int k) 925downheap (ANHE *heap, int N, int k)
501{ 926{
502 WT w = heap [k]; 927 ANHE he = heap [k];
928 ANHE *E = heap + N + HEAP0;
503 929
504 while (k < (N >> 1)) 930 for (;;)
505 { 931 {
506 int j = k << 1; 932 ev_tstamp minat;
933 ANHE *minpos;
934 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
507 935
508 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 936 /* find minimum child */
937 if (expect_true (pos + DHEAP - 1 < E))
509 ++j; 938 {
510 939 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
511 if (w->at <= heap [j]->at) 940 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
941 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
942 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
943 }
944 else if (pos < E)
945 {
946 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
947 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
948 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
949 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
950 }
951 else
512 break; 952 break;
513 953
954 if (ANHE_at (he) <= minat)
955 break;
956
957 heap [k] = *minpos;
958 ev_active (ANHE_w (*minpos)) = k;
959
960 k = minpos - heap;
961 }
962
963 heap [k] = he;
964 ev_active (ANHE_w (he)) = k;
965}
966
967#else /* 4HEAP */
968
969#define HEAP0 1
970#define HPARENT(k) ((k) >> 1)
971#define UPHEAP_DONE(p,k) (!(p))
972
973/* away from the root */
974inline_speed void
975downheap (ANHE *heap, int N, int k)
976{
977 ANHE he = heap [k];
978
979 for (;;)
980 {
981 int c = k << 1;
982
983 if (c > N + HEAP0 - 1)
984 break;
985
986 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
987 ? 1 : 0;
988
989 if (ANHE_at (he) <= ANHE_at (heap [c]))
990 break;
991
514 heap [k] = heap [j]; 992 heap [k] = heap [c];
515 ((W)heap [k])->active = k + 1; 993 ev_active (ANHE_w (heap [k])) = k;
994
516 k = j; 995 k = c;
517 } 996 }
518 997
519 heap [k] = w; 998 heap [k] = he;
520 ((W)heap [k])->active = k + 1; 999 ev_active (ANHE_w (he)) = k;
1000}
1001#endif
1002
1003/* towards the root */
1004inline_speed void
1005upheap (ANHE *heap, int k)
1006{
1007 ANHE he = heap [k];
1008
1009 for (;;)
1010 {
1011 int p = HPARENT (k);
1012
1013 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1014 break;
1015
1016 heap [k] = heap [p];
1017 ev_active (ANHE_w (heap [k])) = k;
1018 k = p;
1019 }
1020
1021 heap [k] = he;
1022 ev_active (ANHE_w (he)) = k;
1023}
1024
1025/* move an element suitably so it is in a correct place */
1026inline_size void
1027adjustheap (ANHE *heap, int N, int k)
1028{
1029 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
1030 upheap (heap, k);
1031 else
1032 downheap (heap, N, k);
1033}
1034
1035/* rebuild the heap: this function is used only once and executed rarely */
1036inline_size void
1037reheap (ANHE *heap, int N)
1038{
1039 int i;
1040
1041 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1042 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1043 for (i = 0; i < N; ++i)
1044 upheap (heap, i + HEAP0);
521} 1045}
522 1046
523/*****************************************************************************/ 1047/*****************************************************************************/
524 1048
1049/* associate signal watchers to a signal signal */
525typedef struct 1050typedef struct
526{ 1051{
527 WL head; 1052 WL head;
528 sig_atomic_t volatile gotsig; 1053 EV_ATOMIC_T gotsig;
529} ANSIG; 1054} ANSIG;
530 1055
531static ANSIG *signals; 1056static ANSIG *signals;
532static int signalmax; 1057static int signalmax;
533 1058
534static int sigpipe [2]; 1059static EV_ATOMIC_T gotsig;
535static sig_atomic_t volatile gotsig;
536static struct ev_io sigev;
537 1060
1061/*****************************************************************************/
1062
1063/* used to prepare libev internal fd's */
1064/* this is not fork-safe */
1065inline_speed void
1066fd_intern (int fd)
1067{
1068#ifdef _WIN32
1069 unsigned long arg = 1;
1070 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1071#else
1072 fcntl (fd, F_SETFD, FD_CLOEXEC);
1073 fcntl (fd, F_SETFL, O_NONBLOCK);
1074#endif
1075}
1076
1077static void noinline
1078evpipe_init (EV_P)
1079{
1080 if (!ev_is_active (&pipe_w))
1081 {
1082#if EV_USE_EVENTFD
1083 if ((evfd = eventfd (0, 0)) >= 0)
1084 {
1085 evpipe [0] = -1;
1086 fd_intern (evfd);
1087 ev_io_set (&pipe_w, evfd, EV_READ);
1088 }
1089 else
1090#endif
1091 {
1092 while (pipe (evpipe))
1093 ev_syserr ("(libev) error creating signal/async pipe");
1094
1095 fd_intern (evpipe [0]);
1096 fd_intern (evpipe [1]);
1097 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1098 }
1099
1100 ev_io_start (EV_A_ &pipe_w);
1101 ev_unref (EV_A); /* watcher should not keep loop alive */
1102 }
1103}
1104
1105inline_size void
1106evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1107{
1108 if (!*flag)
1109 {
1110 int old_errno = errno; /* save errno because write might clobber it */
1111
1112 *flag = 1;
1113
1114#if EV_USE_EVENTFD
1115 if (evfd >= 0)
1116 {
1117 uint64_t counter = 1;
1118 write (evfd, &counter, sizeof (uint64_t));
1119 }
1120 else
1121#endif
1122 write (evpipe [1], &old_errno, 1);
1123
1124 errno = old_errno;
1125 }
1126}
1127
1128/* called whenever the libev signal pipe */
1129/* got some events (signal, async) */
538static void 1130static void
539signals_init (ANSIG *base, int count) 1131pipecb (EV_P_ ev_io *iow, int revents)
540{ 1132{
541 while (count--) 1133#if EV_USE_EVENTFD
1134 if (evfd >= 0)
1135 {
1136 uint64_t counter;
1137 read (evfd, &counter, sizeof (uint64_t));
542 { 1138 }
543 base->head = 0; 1139 else
1140#endif
1141 {
1142 char dummy;
1143 read (evpipe [0], &dummy, 1);
1144 }
1145
1146 if (gotsig && ev_is_default_loop (EV_A))
1147 {
1148 int signum;
544 base->gotsig = 0; 1149 gotsig = 0;
545 1150
546 ++base; 1151 for (signum = signalmax; signum--; )
1152 if (signals [signum].gotsig)
1153 ev_feed_signal_event (EV_A_ signum + 1);
1154 }
1155
1156#if EV_ASYNC_ENABLE
1157 if (gotasync)
547 } 1158 {
1159 int i;
1160 gotasync = 0;
1161
1162 for (i = asynccnt; i--; )
1163 if (asyncs [i]->sent)
1164 {
1165 asyncs [i]->sent = 0;
1166 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1167 }
1168 }
1169#endif
548} 1170}
1171
1172/*****************************************************************************/
549 1173
550static void 1174static void
551sighandler (int signum) 1175ev_sighandler (int signum)
552{ 1176{
1177#if EV_MULTIPLICITY
1178 struct ev_loop *loop = &default_loop_struct;
1179#endif
1180
553#if WIN32 1181#if _WIN32
554 signal (signum, sighandler); 1182 signal (signum, ev_sighandler);
555#endif 1183#endif
556 1184
557 signals [signum - 1].gotsig = 1; 1185 signals [signum - 1].gotsig = 1;
558 1186 evpipe_write (EV_A_ &gotsig);
559 if (!gotsig)
560 {
561 int old_errno = errno;
562 gotsig = 1;
563#ifdef WIN32
564 send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
565#else
566 write (sigpipe [1], &signum, 1);
567#endif
568 errno = old_errno;
569 }
570} 1187}
571 1188
572void 1189void noinline
573ev_feed_signal_event (EV_P_ int signum) 1190ev_feed_signal_event (EV_P_ int signum)
574{ 1191{
575 WL w; 1192 WL w;
576 1193
577#if EV_MULTIPLICITY 1194#if EV_MULTIPLICITY
578 assert (("feeding signal events is only supported in the default loop", loop == default_loop)); 1195 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
579#endif 1196#endif
580 1197
581 --signum; 1198 --signum;
582 1199
583 if (signum < 0 || signum >= signalmax) 1200 if (signum < 0 || signum >= signalmax)
… …
587 1204
588 for (w = signals [signum].head; w; w = w->next) 1205 for (w = signals [signum].head; w; w = w->next)
589 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1206 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
590} 1207}
591 1208
592static void
593sigcb (EV_P_ struct ev_io *iow, int revents)
594{
595 int signum;
596
597#ifdef WIN32
598 recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
599#else
600 read (sigpipe [0], &revents, 1);
601#endif
602 gotsig = 0;
603
604 for (signum = signalmax; signum--; )
605 if (signals [signum].gotsig)
606 ev_feed_signal_event (EV_A_ signum + 1);
607}
608
609static void
610siginit (EV_P)
611{
612#ifndef WIN32
613 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
614 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
615
616 /* rather than sort out wether we really need nb, set it */
617 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
618 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
619#endif
620
621 ev_io_set (&sigev, sigpipe [0], EV_READ);
622 ev_io_start (EV_A_ &sigev);
623 ev_unref (EV_A); /* child watcher should not keep loop alive */
624}
625
626/*****************************************************************************/ 1209/*****************************************************************************/
627 1210
628static struct ev_child *childs [PID_HASHSIZE]; 1211static WL childs [EV_PID_HASHSIZE];
629 1212
630#ifndef WIN32 1213#ifndef _WIN32
631 1214
632static struct ev_signal childev; 1215static ev_signal childev;
1216
1217#ifndef WIFCONTINUED
1218# define WIFCONTINUED(status) 0
1219#endif
1220
1221/* handle a single child status event */
1222inline_speed void
1223child_reap (EV_P_ int chain, int pid, int status)
1224{
1225 ev_child *w;
1226 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1227
1228 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1229 {
1230 if ((w->pid == pid || !w->pid)
1231 && (!traced || (w->flags & 1)))
1232 {
1233 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1234 w->rpid = pid;
1235 w->rstatus = status;
1236 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1237 }
1238 }
1239}
633 1240
634#ifndef WCONTINUED 1241#ifndef WCONTINUED
635# define WCONTINUED 0 1242# define WCONTINUED 0
636#endif 1243#endif
637 1244
1245/* called on sigchld etc., calls waitpid */
638static void 1246static void
639child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
640{
641 struct ev_child *w;
642
643 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
644 if (w->pid == pid || !w->pid)
645 {
646 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
647 w->rpid = pid;
648 w->rstatus = status;
649 ev_feed_event (EV_A_ (W)w, EV_CHILD);
650 }
651}
652
653static void
654childcb (EV_P_ struct ev_signal *sw, int revents) 1247childcb (EV_P_ ev_signal *sw, int revents)
655{ 1248{
656 int pid, status; 1249 int pid, status;
657 1250
1251 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
658 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1252 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
659 { 1253 if (!WCONTINUED
1254 || errno != EINVAL
1255 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1256 return;
1257
660 /* make sure we are called again until all childs have been reaped */ 1258 /* make sure we are called again until all children have been reaped */
1259 /* we need to do it this way so that the callback gets called before we continue */
661 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1260 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
662 1261
663 child_reap (EV_A_ sw, pid, pid, status); 1262 child_reap (EV_A_ pid, pid, status);
1263 if (EV_PID_HASHSIZE > 1)
664 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1264 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
665 }
666} 1265}
667 1266
668#endif 1267#endif
669 1268
670/*****************************************************************************/ 1269/*****************************************************************************/
671 1270
1271#if EV_USE_PORT
1272# include "ev_port.c"
1273#endif
672#if EV_USE_KQUEUE 1274#if EV_USE_KQUEUE
673# include "ev_kqueue.c" 1275# include "ev_kqueue.c"
674#endif 1276#endif
675#if EV_USE_EPOLL 1277#if EV_USE_EPOLL
676# include "ev_epoll.c" 1278# include "ev_epoll.c"
… …
693{ 1295{
694 return EV_VERSION_MINOR; 1296 return EV_VERSION_MINOR;
695} 1297}
696 1298
697/* return true if we are running with elevated privileges and should ignore env variables */ 1299/* return true if we are running with elevated privileges and should ignore env variables */
698static int 1300int inline_size
699enable_secure (void) 1301enable_secure (void)
700{ 1302{
701#ifdef WIN32 1303#ifdef _WIN32
702 return 0; 1304 return 0;
703#else 1305#else
704 return getuid () != geteuid () 1306 return getuid () != geteuid ()
705 || getgid () != getegid (); 1307 || getgid () != getegid ();
706#endif 1308#endif
707} 1309}
708 1310
709int 1311unsigned int
710ev_method (EV_P) 1312ev_supported_backends (void)
711{ 1313{
712 return method; 1314 unsigned int flags = 0;
713}
714 1315
715static void 1316 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
716loop_init (EV_P_ int methods) 1317 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1318 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1319 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1320 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1321
1322 return flags;
1323}
1324
1325unsigned int
1326ev_recommended_backends (void)
717{ 1327{
718 if (!method) 1328 unsigned int flags = ev_supported_backends ();
1329
1330#ifndef __NetBSD__
1331 /* kqueue is borked on everything but netbsd apparently */
1332 /* it usually doesn't work correctly on anything but sockets and pipes */
1333 flags &= ~EVBACKEND_KQUEUE;
1334#endif
1335#ifdef __APPLE__
1336 /* only select works correctly on that "unix-certified" platform */
1337 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1338 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1339#endif
1340
1341 return flags;
1342}
1343
1344unsigned int
1345ev_embeddable_backends (void)
1346{
1347 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1348
1349 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1350 /* please fix it and tell me how to detect the fix */
1351 flags &= ~EVBACKEND_EPOLL;
1352
1353 return flags;
1354}
1355
1356unsigned int
1357ev_backend (EV_P)
1358{
1359 return backend;
1360}
1361
1362unsigned int
1363ev_loop_count (EV_P)
1364{
1365 return loop_count;
1366}
1367
1368unsigned int
1369ev_loop_depth (EV_P)
1370{
1371 return loop_depth;
1372}
1373
1374void
1375ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1376{
1377 io_blocktime = interval;
1378}
1379
1380void
1381ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1382{
1383 timeout_blocktime = interval;
1384}
1385
1386/* initialise a loop structure, must be zero-initialised */
1387static void noinline
1388loop_init (EV_P_ unsigned int flags)
1389{
1390 if (!backend)
719 { 1391 {
1392#if EV_USE_REALTIME
1393 if (!have_realtime)
1394 {
1395 struct timespec ts;
1396
1397 if (!clock_gettime (CLOCK_REALTIME, &ts))
1398 have_realtime = 1;
1399 }
1400#endif
1401
720#if EV_USE_MONOTONIC 1402#if EV_USE_MONOTONIC
1403 if (!have_monotonic)
1404 {
1405 struct timespec ts;
1406
1407 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1408 have_monotonic = 1;
1409 }
1410#endif
1411
1412 ev_rt_now = ev_time ();
1413 mn_now = get_clock ();
1414 now_floor = mn_now;
1415 rtmn_diff = ev_rt_now - mn_now;
1416 invoke_cb = ev_invoke_pending;
1417
1418 io_blocktime = 0.;
1419 timeout_blocktime = 0.;
1420 backend = 0;
1421 backend_fd = -1;
1422 gotasync = 0;
1423#if EV_USE_INOTIFY
1424 fs_fd = -2;
1425#endif
1426
1427 /* pid check not overridable via env */
1428#ifndef _WIN32
1429 if (flags & EVFLAG_FORKCHECK)
1430 curpid = getpid ();
1431#endif
1432
1433 if (!(flags & EVFLAG_NOENV)
1434 && !enable_secure ()
1435 && getenv ("LIBEV_FLAGS"))
1436 flags = atoi (getenv ("LIBEV_FLAGS"));
1437
1438 if (!(flags & 0x0000ffffU))
1439 flags |= ev_recommended_backends ();
1440
1441#if EV_USE_PORT
1442 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1443#endif
1444#if EV_USE_KQUEUE
1445 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1446#endif
1447#if EV_USE_EPOLL
1448 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1449#endif
1450#if EV_USE_POLL
1451 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1452#endif
1453#if EV_USE_SELECT
1454 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1455#endif
1456
1457 ev_prepare_init (&pending_w, pendingcb);
1458
1459 ev_init (&pipe_w, pipecb);
1460 ev_set_priority (&pipe_w, EV_MAXPRI);
1461 }
1462}
1463
1464/* free up a loop structure */
1465static void noinline
1466loop_destroy (EV_P)
1467{
1468 int i;
1469
1470 if (ev_is_active (&pipe_w))
1471 {
1472 ev_ref (EV_A); /* signal watcher */
1473 ev_io_stop (EV_A_ &pipe_w);
1474
1475#if EV_USE_EVENTFD
1476 if (evfd >= 0)
1477 close (evfd);
1478#endif
1479
1480 if (evpipe [0] >= 0)
1481 {
1482 close (evpipe [0]);
1483 close (evpipe [1]);
1484 }
1485 }
1486
1487#if EV_USE_INOTIFY
1488 if (fs_fd >= 0)
1489 close (fs_fd);
1490#endif
1491
1492 if (backend_fd >= 0)
1493 close (backend_fd);
1494
1495#if EV_USE_PORT
1496 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1497#endif
1498#if EV_USE_KQUEUE
1499 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1500#endif
1501#if EV_USE_EPOLL
1502 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1503#endif
1504#if EV_USE_POLL
1505 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1506#endif
1507#if EV_USE_SELECT
1508 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1509#endif
1510
1511 for (i = NUMPRI; i--; )
1512 {
1513 array_free (pending, [i]);
1514#if EV_IDLE_ENABLE
1515 array_free (idle, [i]);
1516#endif
1517 }
1518
1519 ev_free (anfds); anfdmax = 0;
1520
1521 /* have to use the microsoft-never-gets-it-right macro */
1522 array_free (rfeed, EMPTY);
1523 array_free (fdchange, EMPTY);
1524 array_free (timer, EMPTY);
1525#if EV_PERIODIC_ENABLE
1526 array_free (periodic, EMPTY);
1527#endif
1528#if EV_FORK_ENABLE
1529 array_free (fork, EMPTY);
1530#endif
1531 array_free (prepare, EMPTY);
1532 array_free (check, EMPTY);
1533#if EV_ASYNC_ENABLE
1534 array_free (async, EMPTY);
1535#endif
1536
1537 backend = 0;
1538}
1539
1540#if EV_USE_INOTIFY
1541inline_size void infy_fork (EV_P);
1542#endif
1543
1544inline_size void
1545loop_fork (EV_P)
1546{
1547#if EV_USE_PORT
1548 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1549#endif
1550#if EV_USE_KQUEUE
1551 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1552#endif
1553#if EV_USE_EPOLL
1554 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1555#endif
1556#if EV_USE_INOTIFY
1557 infy_fork (EV_A);
1558#endif
1559
1560 if (ev_is_active (&pipe_w))
1561 {
1562 /* this "locks" the handlers against writing to the pipe */
1563 /* while we modify the fd vars */
1564 gotsig = 1;
1565#if EV_ASYNC_ENABLE
1566 gotasync = 1;
1567#endif
1568
1569 ev_ref (EV_A);
1570 ev_io_stop (EV_A_ &pipe_w);
1571
1572#if EV_USE_EVENTFD
1573 if (evfd >= 0)
1574 close (evfd);
1575#endif
1576
1577 if (evpipe [0] >= 0)
1578 {
1579 close (evpipe [0]);
1580 close (evpipe [1]);
1581 }
1582
1583 evpipe_init (EV_A);
1584 /* now iterate over everything, in case we missed something */
1585 pipecb (EV_A_ &pipe_w, EV_READ);
1586 }
1587
1588 postfork = 0;
1589}
1590
1591#if EV_MULTIPLICITY
1592
1593struct ev_loop *
1594ev_loop_new (unsigned int flags)
1595{
1596 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1597
1598 memset (loop, 0, sizeof (struct ev_loop));
1599
1600 loop_init (EV_A_ flags);
1601
1602 if (ev_backend (EV_A))
1603 return loop;
1604
1605 return 0;
1606}
1607
1608void
1609ev_loop_destroy (EV_P)
1610{
1611 loop_destroy (EV_A);
1612 ev_free (loop);
1613}
1614
1615void
1616ev_loop_fork (EV_P)
1617{
1618 postfork = 1; /* must be in line with ev_default_fork */
1619}
1620
1621#if EV_VERIFY
1622static void noinline
1623verify_watcher (EV_P_ W w)
1624{
1625 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1626
1627 if (w->pending)
1628 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1629}
1630
1631static void noinline
1632verify_heap (EV_P_ ANHE *heap, int N)
1633{
1634 int i;
1635
1636 for (i = HEAP0; i < N + HEAP0; ++i)
1637 {
1638 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1639 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1640 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1641
1642 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1643 }
1644}
1645
1646static void noinline
1647array_verify (EV_P_ W *ws, int cnt)
1648{
1649 while (cnt--)
1650 {
1651 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1652 verify_watcher (EV_A_ ws [cnt]);
1653 }
1654}
1655#endif
1656
1657void
1658ev_loop_verify (EV_P)
1659{
1660#if EV_VERIFY
1661 int i;
1662 WL w;
1663
1664 assert (activecnt >= -1);
1665
1666 assert (fdchangemax >= fdchangecnt);
1667 for (i = 0; i < fdchangecnt; ++i)
1668 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1669
1670 assert (anfdmax >= 0);
1671 for (i = 0; i < anfdmax; ++i)
1672 for (w = anfds [i].head; w; w = w->next)
721 { 1673 {
722 struct timespec ts; 1674 verify_watcher (EV_A_ (W)w);
723 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1675 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
724 have_monotonic = 1; 1676 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
725 } 1677 }
726#endif
727 1678
728 rt_now = ev_time (); 1679 assert (timermax >= timercnt);
729 mn_now = get_clock (); 1680 verify_heap (EV_A_ timers, timercnt);
730 now_floor = mn_now;
731 rtmn_diff = rt_now - mn_now;
732 1681
733 if (methods == EVMETHOD_AUTO) 1682#if EV_PERIODIC_ENABLE
734 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1683 assert (periodicmax >= periodiccnt);
735 methods = atoi (getenv ("LIBEV_METHODS")); 1684 verify_heap (EV_A_ periodics, periodiccnt);
736 else
737 methods = EVMETHOD_ANY;
738
739 method = 0;
740#if EV_USE_WIN32
741 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
742#endif
743#if EV_USE_KQUEUE
744 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
745#endif
746#if EV_USE_EPOLL
747 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
748#endif
749#if EV_USE_POLL
750 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
751#endif
752#if EV_USE_SELECT
753 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
754#endif
755
756 ev_init (&sigev, sigcb);
757 ev_set_priority (&sigev, EV_MAXPRI);
758 }
759}
760
761void
762loop_destroy (EV_P)
763{
764 int i;
765
766#if EV_USE_WIN32
767 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
768#endif
769#if EV_USE_KQUEUE
770 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
771#endif
772#if EV_USE_EPOLL
773 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
774#endif
775#if EV_USE_POLL
776 if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
777#endif
778#if EV_USE_SELECT
779 if (method == EVMETHOD_SELECT) select_destroy (EV_A);
780#endif 1685#endif
781 1686
782 for (i = NUMPRI; i--; ) 1687 for (i = NUMPRI; i--; )
783 array_free (pending, [i]); 1688 {
1689 assert (pendingmax [i] >= pendingcnt [i]);
1690#if EV_IDLE_ENABLE
1691 assert (idleall >= 0);
1692 assert (idlemax [i] >= idlecnt [i]);
1693 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1694#endif
1695 }
784 1696
785 /* have to use the microsoft-never-gets-it-right macro */ 1697#if EV_FORK_ENABLE
786 array_free_microshit (fdchange); 1698 assert (forkmax >= forkcnt);
787 array_free_microshit (timer); 1699 array_verify (EV_A_ (W *)forks, forkcnt);
788 array_free_microshit (periodic); 1700#endif
789 array_free_microshit (idle);
790 array_free_microshit (prepare);
791 array_free_microshit (check);
792 1701
793 method = 0; 1702#if EV_ASYNC_ENABLE
794} 1703 assert (asyncmax >= asynccnt);
1704 array_verify (EV_A_ (W *)asyncs, asynccnt);
1705#endif
795 1706
796static void 1707 assert (preparemax >= preparecnt);
797loop_fork (EV_P) 1708 array_verify (EV_A_ (W *)prepares, preparecnt);
798{ 1709
799#if EV_USE_EPOLL 1710 assert (checkmax >= checkcnt);
800 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1711 array_verify (EV_A_ (W *)checks, checkcnt);
1712
1713# if 0
1714 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1715 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
801#endif 1716# endif
802#if EV_USE_KQUEUE
803 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
804#endif 1717#endif
805
806 if (ev_is_active (&sigev))
807 {
808 /* default loop */
809
810 ev_ref (EV_A);
811 ev_io_stop (EV_A_ &sigev);
812 close (sigpipe [0]);
813 close (sigpipe [1]);
814
815 while (pipe (sigpipe))
816 syserr ("(libev) error creating pipe");
817
818 siginit (EV_A);
819 }
820
821 postfork = 0;
822} 1718}
1719
1720#endif /* multiplicity */
823 1721
824#if EV_MULTIPLICITY 1722#if EV_MULTIPLICITY
825struct ev_loop * 1723struct ev_loop *
826ev_loop_new (int methods) 1724ev_default_loop_init (unsigned int flags)
827{
828 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
829
830 memset (loop, 0, sizeof (struct ev_loop));
831
832 loop_init (EV_A_ methods);
833
834 if (ev_method (EV_A))
835 return loop;
836
837 return 0;
838}
839
840void
841ev_loop_destroy (EV_P)
842{
843 loop_destroy (EV_A);
844 ev_free (loop);
845}
846
847void
848ev_loop_fork (EV_P)
849{
850 postfork = 1;
851}
852
853#endif
854
855#if EV_MULTIPLICITY
856struct ev_loop *
857#else 1725#else
858int 1726int
1727ev_default_loop (unsigned int flags)
859#endif 1728#endif
860ev_default_loop (int methods)
861{ 1729{
862 if (sigpipe [0] == sigpipe [1])
863 if (pipe (sigpipe))
864 return 0;
865
866 if (!default_loop) 1730 if (!ev_default_loop_ptr)
867 { 1731 {
868#if EV_MULTIPLICITY 1732#if EV_MULTIPLICITY
869 struct ev_loop *loop = default_loop = &default_loop_struct; 1733 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
870#else 1734#else
871 default_loop = 1; 1735 ev_default_loop_ptr = 1;
872#endif 1736#endif
873 1737
874 loop_init (EV_A_ methods); 1738 loop_init (EV_A_ flags);
875 1739
876 if (ev_method (EV_A)) 1740 if (ev_backend (EV_A))
877 { 1741 {
878 siginit (EV_A);
879
880#ifndef WIN32 1742#ifndef _WIN32
881 ev_signal_init (&childev, childcb, SIGCHLD); 1743 ev_signal_init (&childev, childcb, SIGCHLD);
882 ev_set_priority (&childev, EV_MAXPRI); 1744 ev_set_priority (&childev, EV_MAXPRI);
883 ev_signal_start (EV_A_ &childev); 1745 ev_signal_start (EV_A_ &childev);
884 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1746 ev_unref (EV_A); /* child watcher should not keep loop alive */
885#endif 1747#endif
886 } 1748 }
887 else 1749 else
888 default_loop = 0; 1750 ev_default_loop_ptr = 0;
889 } 1751 }
890 1752
891 return default_loop; 1753 return ev_default_loop_ptr;
892} 1754}
893 1755
894void 1756void
895ev_default_destroy (void) 1757ev_default_destroy (void)
896{ 1758{
897#if EV_MULTIPLICITY 1759#if EV_MULTIPLICITY
898 struct ev_loop *loop = default_loop; 1760 struct ev_loop *loop = ev_default_loop_ptr;
899#endif 1761#endif
900 1762
1763 ev_default_loop_ptr = 0;
1764
901#ifndef WIN32 1765#ifndef _WIN32
902 ev_ref (EV_A); /* child watcher */ 1766 ev_ref (EV_A); /* child watcher */
903 ev_signal_stop (EV_A_ &childev); 1767 ev_signal_stop (EV_A_ &childev);
904#endif 1768#endif
905 1769
906 ev_ref (EV_A); /* signal watcher */
907 ev_io_stop (EV_A_ &sigev);
908
909 close (sigpipe [0]); sigpipe [0] = 0;
910 close (sigpipe [1]); sigpipe [1] = 0;
911
912 loop_destroy (EV_A); 1770 loop_destroy (EV_A);
913} 1771}
914 1772
915void 1773void
916ev_default_fork (void) 1774ev_default_fork (void)
917{ 1775{
918#if EV_MULTIPLICITY 1776#if EV_MULTIPLICITY
919 struct ev_loop *loop = default_loop; 1777 struct ev_loop *loop = ev_default_loop_ptr;
920#endif 1778#endif
921 1779
922 if (method) 1780 postfork = 1; /* must be in line with ev_loop_fork */
923 postfork = 1;
924} 1781}
925 1782
926/*****************************************************************************/ 1783/*****************************************************************************/
927 1784
928static int 1785void
1786ev_invoke (EV_P_ void *w, int revents)
1787{
1788 EV_CB_INVOKE ((W)w, revents);
1789}
1790
1791void
929any_pending (EV_P) 1792ev_invoke_pending (EV_P)
930{
931 int pri;
932
933 for (pri = NUMPRI; pri--; )
934 if (pendingcnt [pri])
935 return 1;
936
937 return 0;
938}
939
940static void
941call_pending (EV_P)
942{ 1793{
943 int pri; 1794 int pri;
944 1795
945 for (pri = NUMPRI; pri--; ) 1796 for (pri = NUMPRI; pri--; )
946 while (pendingcnt [pri]) 1797 while (pendingcnt [pri])
947 { 1798 {
948 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1799 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
949 1800
950 if (p->w) 1801 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
951 { 1802 /* ^ this is no longer true, as pending_w could be here */
1803
952 p->w->pending = 0; 1804 p->w->pending = 0;
953 EV_CB_INVOKE (p->w, p->events); 1805 EV_CB_INVOKE (p->w, p->events);
954 } 1806 EV_FREQUENT_CHECK;
955 } 1807 }
956} 1808}
957 1809
958static void 1810#if EV_IDLE_ENABLE
1811/* make idle watchers pending. this handles the "call-idle */
1812/* only when higher priorities are idle" logic */
1813inline_size void
1814idle_reify (EV_P)
1815{
1816 if (expect_false (idleall))
1817 {
1818 int pri;
1819
1820 for (pri = NUMPRI; pri--; )
1821 {
1822 if (pendingcnt [pri])
1823 break;
1824
1825 if (idlecnt [pri])
1826 {
1827 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1828 break;
1829 }
1830 }
1831 }
1832}
1833#endif
1834
1835/* make timers pending */
1836inline_size void
959timers_reify (EV_P) 1837timers_reify (EV_P)
960{ 1838{
1839 EV_FREQUENT_CHECK;
1840
961 while (timercnt && ((WT)timers [0])->at <= mn_now) 1841 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
962 { 1842 {
963 struct ev_timer *w = timers [0]; 1843 do
964
965 assert (("inactive timer on timer heap detected", ev_is_active (w)));
966
967 /* first reschedule or stop timer */
968 if (w->repeat)
969 { 1844 {
1845 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1846
1847 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
1848
1849 /* first reschedule or stop timer */
1850 if (w->repeat)
1851 {
1852 ev_at (w) += w->repeat;
1853 if (ev_at (w) < mn_now)
1854 ev_at (w) = mn_now;
1855
970 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1856 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
971 ((WT)w)->at = mn_now + w->repeat; 1857
1858 ANHE_at_cache (timers [HEAP0]);
972 downheap ((WT *)timers, timercnt, 0); 1859 downheap (timers, timercnt, HEAP0);
1860 }
1861 else
1862 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1863
1864 EV_FREQUENT_CHECK;
1865 feed_reverse (EV_A_ (W)w);
973 } 1866 }
974 else 1867 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
975 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
976 1868
977 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 1869 feed_reverse_done (EV_A_ EV_TIMEOUT);
978 } 1870 }
979} 1871}
980 1872
981static void 1873#if EV_PERIODIC_ENABLE
1874/* make periodics pending */
1875inline_size void
982periodics_reify (EV_P) 1876periodics_reify (EV_P)
983{ 1877{
1878 EV_FREQUENT_CHECK;
1879
984 while (periodiccnt && ((WT)periodics [0])->at <= rt_now) 1880 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
985 { 1881 {
986 struct ev_periodic *w = periodics [0]; 1882 int feed_count = 0;
987 1883
1884 do
1885 {
1886 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1887
988 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1888 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
989 1889
990 /* first reschedule or stop timer */ 1890 /* first reschedule or stop timer */
1891 if (w->reschedule_cb)
1892 {
1893 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1894
1895 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1896
1897 ANHE_at_cache (periodics [HEAP0]);
1898 downheap (periodics, periodiccnt, HEAP0);
1899 }
1900 else if (w->interval)
1901 {
1902 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1903 /* if next trigger time is not sufficiently in the future, put it there */
1904 /* this might happen because of floating point inexactness */
1905 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1906 {
1907 ev_at (w) += w->interval;
1908
1909 /* if interval is unreasonably low we might still have a time in the past */
1910 /* so correct this. this will make the periodic very inexact, but the user */
1911 /* has effectively asked to get triggered more often than possible */
1912 if (ev_at (w) < ev_rt_now)
1913 ev_at (w) = ev_rt_now;
1914 }
1915
1916 ANHE_at_cache (periodics [HEAP0]);
1917 downheap (periodics, periodiccnt, HEAP0);
1918 }
1919 else
1920 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1921
1922 EV_FREQUENT_CHECK;
1923 feed_reverse (EV_A_ (W)w);
1924 }
1925 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1926
1927 feed_reverse_done (EV_A_ EV_PERIODIC);
1928 }
1929}
1930
1931/* simply recalculate all periodics */
1932/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1933static void noinline
1934periodics_reschedule (EV_P)
1935{
1936 int i;
1937
1938 /* adjust periodics after time jump */
1939 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1940 {
1941 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1942
991 if (w->reschedule_cb) 1943 if (w->reschedule_cb)
992 {
993 ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001); 1944 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
994
995 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));
996 downheap ((WT *)periodics, periodiccnt, 0);
997 }
998 else if (w->interval) 1945 else if (w->interval)
999 { 1946 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1000 ((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1001 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
1002 downheap ((WT *)periodics, periodiccnt, 0);
1003 }
1004 else
1005 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1006 1947
1007 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 1948 ANHE_at_cache (periodics [i]);
1008 } 1949 }
1009}
1010 1950
1011static void 1951 reheap (periodics, periodiccnt);
1012periodics_reschedule (EV_P) 1952}
1953#endif
1954
1955/* adjust all timers by a given offset */
1956static void noinline
1957timers_reschedule (EV_P_ ev_tstamp adjust)
1013{ 1958{
1014 int i; 1959 int i;
1015 1960
1016 /* adjust periodics after time jump */
1017 for (i = 0; i < periodiccnt; ++i) 1961 for (i = 0; i < timercnt; ++i)
1018 {
1019 struct ev_periodic *w = periodics [i];
1020
1021 if (w->reschedule_cb)
1022 ((WT)w)->at = w->reschedule_cb (w, rt_now);
1023 else if (w->interval)
1024 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
1025 } 1962 {
1026 1963 ANHE *he = timers + i + HEAP0;
1027 /* now rebuild the heap */ 1964 ANHE_w (*he)->at += adjust;
1028 for (i = periodiccnt >> 1; i--; ) 1965 ANHE_at_cache (*he);
1029 downheap ((WT *)periodics, periodiccnt, i);
1030}
1031
1032inline int
1033time_update_monotonic (EV_P)
1034{
1035 mn_now = get_clock ();
1036
1037 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1038 { 1966 }
1039 rt_now = rtmn_diff + mn_now;
1040 return 0;
1041 }
1042 else
1043 {
1044 now_floor = mn_now;
1045 rt_now = ev_time ();
1046 return 1;
1047 }
1048} 1967}
1049 1968
1050static void 1969/* fetch new monotonic and realtime times from the kernel */
1051time_update (EV_P) 1970/* also detetc if there was a timejump, and act accordingly */
1971inline_speed void
1972time_update (EV_P_ ev_tstamp max_block)
1052{ 1973{
1053 int i;
1054
1055#if EV_USE_MONOTONIC 1974#if EV_USE_MONOTONIC
1056 if (expect_true (have_monotonic)) 1975 if (expect_true (have_monotonic))
1057 { 1976 {
1058 if (time_update_monotonic (EV_A)) 1977 int i;
1978 ev_tstamp odiff = rtmn_diff;
1979
1980 mn_now = get_clock ();
1981
1982 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1983 /* interpolate in the meantime */
1984 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1059 { 1985 {
1060 ev_tstamp odiff = rtmn_diff; 1986 ev_rt_now = rtmn_diff + mn_now;
1987 return;
1988 }
1061 1989
1990 now_floor = mn_now;
1991 ev_rt_now = ev_time ();
1992
1062 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1993 /* loop a few times, before making important decisions.
1994 * on the choice of "4": one iteration isn't enough,
1995 * in case we get preempted during the calls to
1996 * ev_time and get_clock. a second call is almost guaranteed
1997 * to succeed in that case, though. and looping a few more times
1998 * doesn't hurt either as we only do this on time-jumps or
1999 * in the unlikely event of having been preempted here.
2000 */
2001 for (i = 4; --i; )
1063 { 2002 {
1064 rtmn_diff = rt_now - mn_now; 2003 rtmn_diff = ev_rt_now - mn_now;
1065 2004
1066 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2005 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1067 return; /* all is well */ 2006 return; /* all is well */
1068 2007
1069 rt_now = ev_time (); 2008 ev_rt_now = ev_time ();
1070 mn_now = get_clock (); 2009 mn_now = get_clock ();
1071 now_floor = mn_now; 2010 now_floor = mn_now;
1072 } 2011 }
1073 2012
2013 /* no timer adjustment, as the monotonic clock doesn't jump */
2014 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2015# if EV_PERIODIC_ENABLE
2016 periodics_reschedule (EV_A);
2017# endif
2018 }
2019 else
2020#endif
2021 {
2022 ev_rt_now = ev_time ();
2023
2024 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2025 {
2026 /* adjust timers. this is easy, as the offset is the same for all of them */
2027 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2028#if EV_PERIODIC_ENABLE
1074 periodics_reschedule (EV_A); 2029 periodics_reschedule (EV_A);
1075 /* no timer adjustment, as the monotonic clock doesn't jump */ 2030#endif
1076 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1077 } 2031 }
1078 }
1079 else
1080#endif
1081 {
1082 rt_now = ev_time ();
1083 2032
1084 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1085 {
1086 periodics_reschedule (EV_A);
1087
1088 /* adjust timers. this is easy, as the offset is the same for all */
1089 for (i = 0; i < timercnt; ++i)
1090 ((WT)timers [i])->at += rt_now - mn_now;
1091 }
1092
1093 mn_now = rt_now; 2033 mn_now = ev_rt_now;
1094 } 2034 }
1095} 2035}
1096
1097void
1098ev_ref (EV_P)
1099{
1100 ++activecnt;
1101}
1102
1103void
1104ev_unref (EV_P)
1105{
1106 --activecnt;
1107}
1108
1109static int loop_done;
1110 2036
1111void 2037void
1112ev_loop (EV_P_ int flags) 2038ev_loop (EV_P_ int flags)
1113{ 2039{
1114 double block; 2040 ++loop_depth;
1115 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 2041
2042 loop_done = EVUNLOOP_CANCEL;
2043
2044 invoke_cb (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1116 2045
1117 do 2046 do
1118 { 2047 {
2048#if EV_VERIFY >= 2
2049 ev_loop_verify (EV_A);
2050#endif
2051
2052#ifndef _WIN32
2053 if (expect_false (curpid)) /* penalise the forking check even more */
2054 if (expect_false (getpid () != curpid))
2055 {
2056 curpid = getpid ();
2057 postfork = 1;
2058 }
2059#endif
2060
2061#if EV_FORK_ENABLE
2062 /* we might have forked, so queue fork handlers */
2063 if (expect_false (postfork))
2064 if (forkcnt)
2065 {
2066 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2067 invoke_cb (EV_A);
2068 }
2069#endif
2070
1119 /* queue check watchers (and execute them) */ 2071 /* queue prepare watchers (and execute them) */
1120 if (expect_false (preparecnt)) 2072 if (expect_false (preparecnt))
1121 { 2073 {
1122 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2074 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1123 call_pending (EV_A); 2075 invoke_cb (EV_A);
1124 } 2076 }
1125 2077
1126 /* we might have forked, so reify kernel state if necessary */ 2078 /* we might have forked, so reify kernel state if necessary */
1127 if (expect_false (postfork)) 2079 if (expect_false (postfork))
1128 loop_fork (EV_A); 2080 loop_fork (EV_A);
1129 2081
1130 /* update fd-related kernel structures */ 2082 /* update fd-related kernel structures */
1131 fd_reify (EV_A); 2083 fd_reify (EV_A);
1132 2084
1133 /* calculate blocking time */ 2085 /* calculate blocking time */
2086 {
2087 ev_tstamp waittime = 0.;
2088 ev_tstamp sleeptime = 0.;
1134 2089
1135 /* we only need this for !monotonic clock or timers, but as we basically 2090 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1136 always have timers, we just calculate it always */
1137#if EV_USE_MONOTONIC
1138 if (expect_true (have_monotonic))
1139 time_update_monotonic (EV_A);
1140 else
1141#endif
1142 { 2091 {
1143 rt_now = ev_time (); 2092 /* remember old timestamp for io_blocktime calculation */
1144 mn_now = rt_now; 2093 ev_tstamp prev_mn_now = mn_now;
1145 }
1146 2094
1147 if (flags & EVLOOP_NONBLOCK || idlecnt) 2095 /* update time to cancel out callback processing overhead */
1148 block = 0.; 2096 time_update (EV_A_ 1e100);
1149 else 2097
1150 {
1151 block = MAX_BLOCKTIME; 2098 waittime = MAX_BLOCKTIME;
1152 2099
1153 if (timercnt) 2100 if (timercnt)
1154 { 2101 {
1155 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 2102 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1156 if (block > to) block = to; 2103 if (waittime > to) waittime = to;
1157 } 2104 }
1158 2105
2106#if EV_PERIODIC_ENABLE
1159 if (periodiccnt) 2107 if (periodiccnt)
1160 { 2108 {
1161 ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge; 2109 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1162 if (block > to) block = to; 2110 if (waittime > to) waittime = to;
1163 } 2111 }
2112#endif
1164 2113
1165 if (block < 0.) block = 0.; 2114 /* don't let timeouts decrease the waittime below timeout_blocktime */
2115 if (expect_false (waittime < timeout_blocktime))
2116 waittime = timeout_blocktime;
2117
2118 /* extra check because io_blocktime is commonly 0 */
2119 if (expect_false (io_blocktime))
2120 {
2121 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2122
2123 if (sleeptime > waittime - backend_fudge)
2124 sleeptime = waittime - backend_fudge;
2125
2126 if (expect_true (sleeptime > 0.))
2127 {
2128 ev_sleep (sleeptime);
2129 waittime -= sleeptime;
2130 }
2131 }
1166 } 2132 }
1167 2133
1168 method_poll (EV_A_ block); 2134 ++loop_count;
2135 backend_poll (EV_A_ waittime);
1169 2136
1170 /* update rt_now, do magic */ 2137 /* update ev_rt_now, do magic */
1171 time_update (EV_A); 2138 time_update (EV_A_ waittime + sleeptime);
2139 }
1172 2140
1173 /* queue pending timers and reschedule them */ 2141 /* queue pending timers and reschedule them */
1174 timers_reify (EV_A); /* relative timers called last */ 2142 timers_reify (EV_A); /* relative timers called last */
2143#if EV_PERIODIC_ENABLE
1175 periodics_reify (EV_A); /* absolute timers called first */ 2144 periodics_reify (EV_A); /* absolute timers called first */
2145#endif
1176 2146
2147#if EV_IDLE_ENABLE
1177 /* queue idle watchers unless io or timers are pending */ 2148 /* queue idle watchers unless other events are pending */
1178 if (idlecnt && !any_pending (EV_A)) 2149 idle_reify (EV_A);
1179 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2150#endif
1180 2151
1181 /* queue check watchers, to be executed first */ 2152 /* queue check watchers, to be executed first */
1182 if (checkcnt) 2153 if (expect_false (checkcnt))
1183 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2154 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1184 2155
1185 call_pending (EV_A); 2156 invoke_cb (EV_A);
1186 } 2157 }
1187 while (activecnt && !loop_done); 2158 while (expect_true (
2159 activecnt
2160 && !loop_done
2161 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2162 ));
1188 2163
1189 if (loop_done != 2) 2164 if (loop_done == EVUNLOOP_ONE)
1190 loop_done = 0; 2165 loop_done = EVUNLOOP_CANCEL;
2166
2167 --loop_depth;
1191} 2168}
1192 2169
1193void 2170void
1194ev_unloop (EV_P_ int how) 2171ev_unloop (EV_P_ int how)
1195{ 2172{
1196 loop_done = how; 2173 loop_done = how;
1197} 2174}
1198 2175
2176void
2177ev_ref (EV_P)
2178{
2179 ++activecnt;
2180}
2181
2182void
2183ev_unref (EV_P)
2184{
2185 --activecnt;
2186}
2187
2188void
2189ev_now_update (EV_P)
2190{
2191 time_update (EV_A_ 1e100);
2192}
2193
2194void
2195ev_suspend (EV_P)
2196{
2197 ev_now_update (EV_A);
2198}
2199
2200void
2201ev_resume (EV_P)
2202{
2203 ev_tstamp mn_prev = mn_now;
2204
2205 ev_now_update (EV_A);
2206 timers_reschedule (EV_A_ mn_now - mn_prev);
2207#if EV_PERIODIC_ENABLE
2208 /* TODO: really do this? */
2209 periodics_reschedule (EV_A);
2210#endif
2211}
2212
1199/*****************************************************************************/ 2213/*****************************************************************************/
2214/* singly-linked list management, used when the expected list length is short */
1200 2215
1201inline void 2216inline_size void
1202wlist_add (WL *head, WL elem) 2217wlist_add (WL *head, WL elem)
1203{ 2218{
1204 elem->next = *head; 2219 elem->next = *head;
1205 *head = elem; 2220 *head = elem;
1206} 2221}
1207 2222
1208inline void 2223inline_size void
1209wlist_del (WL *head, WL elem) 2224wlist_del (WL *head, WL elem)
1210{ 2225{
1211 while (*head) 2226 while (*head)
1212 { 2227 {
1213 if (*head == elem) 2228 if (*head == elem)
… …
1218 2233
1219 head = &(*head)->next; 2234 head = &(*head)->next;
1220 } 2235 }
1221} 2236}
1222 2237
2238/* internal, faster, version of ev_clear_pending */
1223inline void 2239inline_speed void
1224ev_clear_pending (EV_P_ W w) 2240clear_pending (EV_P_ W w)
1225{ 2241{
1226 if (w->pending) 2242 if (w->pending)
1227 { 2243 {
1228 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2244 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1229 w->pending = 0; 2245 w->pending = 0;
1230 } 2246 }
1231} 2247}
1232 2248
2249int
2250ev_clear_pending (EV_P_ void *w)
2251{
2252 W w_ = (W)w;
2253 int pending = w_->pending;
2254
2255 if (expect_true (pending))
2256 {
2257 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2258 p->w = (W)&pending_w;
2259 w_->pending = 0;
2260 return p->events;
2261 }
2262 else
2263 return 0;
2264}
2265
1233inline void 2266inline_size void
2267pri_adjust (EV_P_ W w)
2268{
2269 int pri = ev_priority (w);
2270 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2271 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2272 ev_set_priority (w, pri);
2273}
2274
2275inline_speed void
1234ev_start (EV_P_ W w, int active) 2276ev_start (EV_P_ W w, int active)
1235{ 2277{
1236 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2278 pri_adjust (EV_A_ w);
1237 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1238
1239 w->active = active; 2279 w->active = active;
1240 ev_ref (EV_A); 2280 ev_ref (EV_A);
1241} 2281}
1242 2282
1243inline void 2283inline_size void
1244ev_stop (EV_P_ W w) 2284ev_stop (EV_P_ W w)
1245{ 2285{
1246 ev_unref (EV_A); 2286 ev_unref (EV_A);
1247 w->active = 0; 2287 w->active = 0;
1248} 2288}
1249 2289
1250/*****************************************************************************/ 2290/*****************************************************************************/
1251 2291
1252void 2292void noinline
1253ev_io_start (EV_P_ struct ev_io *w) 2293ev_io_start (EV_P_ ev_io *w)
1254{ 2294{
1255 int fd = w->fd; 2295 int fd = w->fd;
1256 2296
1257 if (ev_is_active (w)) 2297 if (expect_false (ev_is_active (w)))
1258 return; 2298 return;
1259 2299
1260 assert (("ev_io_start called with negative fd", fd >= 0)); 2300 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2301 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2302
2303 EV_FREQUENT_CHECK;
1261 2304
1262 ev_start (EV_A_ (W)w, 1); 2305 ev_start (EV_A_ (W)w, 1);
1263 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2306 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1264 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2307 wlist_add (&anfds[fd].head, (WL)w);
1265 2308
1266 fd_change (EV_A_ fd); 2309 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
1267} 2310 w->events &= ~EV__IOFDSET;
1268 2311
1269void 2312 EV_FREQUENT_CHECK;
2313}
2314
2315void noinline
1270ev_io_stop (EV_P_ struct ev_io *w) 2316ev_io_stop (EV_P_ ev_io *w)
1271{ 2317{
1272 ev_clear_pending (EV_A_ (W)w); 2318 clear_pending (EV_A_ (W)w);
1273 if (!ev_is_active (w)) 2319 if (expect_false (!ev_is_active (w)))
1274 return; 2320 return;
1275 2321
2322 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2323
2324 EV_FREQUENT_CHECK;
2325
1276 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2326 wlist_del (&anfds[w->fd].head, (WL)w);
1277 ev_stop (EV_A_ (W)w); 2327 ev_stop (EV_A_ (W)w);
1278 2328
1279 fd_change (EV_A_ w->fd); 2329 fd_change (EV_A_ w->fd, 1);
1280}
1281 2330
1282void 2331 EV_FREQUENT_CHECK;
2332}
2333
2334void noinline
1283ev_timer_start (EV_P_ struct ev_timer *w) 2335ev_timer_start (EV_P_ ev_timer *w)
1284{ 2336{
1285 if (ev_is_active (w)) 2337 if (expect_false (ev_is_active (w)))
1286 return; 2338 return;
1287 2339
1288 ((WT)w)->at += mn_now; 2340 ev_at (w) += mn_now;
1289 2341
1290 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2342 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1291 2343
2344 EV_FREQUENT_CHECK;
2345
2346 ++timercnt;
1292 ev_start (EV_A_ (W)w, ++timercnt); 2347 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1293 array_needsize (struct ev_timer *, timers, timermax, timercnt, (void)); 2348 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1294 timers [timercnt - 1] = w; 2349 ANHE_w (timers [ev_active (w)]) = (WT)w;
1295 upheap ((WT *)timers, timercnt - 1); 2350 ANHE_at_cache (timers [ev_active (w)]);
2351 upheap (timers, ev_active (w));
1296 2352
2353 EV_FREQUENT_CHECK;
2354
1297 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2355 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1298} 2356}
1299 2357
1300void 2358void noinline
1301ev_timer_stop (EV_P_ struct ev_timer *w) 2359ev_timer_stop (EV_P_ ev_timer *w)
1302{ 2360{
1303 ev_clear_pending (EV_A_ (W)w); 2361 clear_pending (EV_A_ (W)w);
1304 if (!ev_is_active (w)) 2362 if (expect_false (!ev_is_active (w)))
1305 return; 2363 return;
1306 2364
2365 EV_FREQUENT_CHECK;
2366
2367 {
2368 int active = ev_active (w);
2369
1307 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2370 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1308 2371
1309 if (((W)w)->active < timercnt--) 2372 --timercnt;
2373
2374 if (expect_true (active < timercnt + HEAP0))
1310 { 2375 {
1311 timers [((W)w)->active - 1] = timers [timercnt]; 2376 timers [active] = timers [timercnt + HEAP0];
1312 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2377 adjustheap (timers, timercnt, active);
1313 } 2378 }
2379 }
1314 2380
1315 ((WT)w)->at = w->repeat; 2381 EV_FREQUENT_CHECK;
2382
2383 ev_at (w) -= mn_now;
1316 2384
1317 ev_stop (EV_A_ (W)w); 2385 ev_stop (EV_A_ (W)w);
1318} 2386}
1319 2387
1320void 2388void noinline
1321ev_timer_again (EV_P_ struct ev_timer *w) 2389ev_timer_again (EV_P_ ev_timer *w)
1322{ 2390{
2391 EV_FREQUENT_CHECK;
2392
1323 if (ev_is_active (w)) 2393 if (ev_is_active (w))
1324 { 2394 {
1325 if (w->repeat) 2395 if (w->repeat)
1326 { 2396 {
1327 ((WT)w)->at = mn_now + w->repeat; 2397 ev_at (w) = mn_now + w->repeat;
1328 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2398 ANHE_at_cache (timers [ev_active (w)]);
2399 adjustheap (timers, timercnt, ev_active (w));
1329 } 2400 }
1330 else 2401 else
1331 ev_timer_stop (EV_A_ w); 2402 ev_timer_stop (EV_A_ w);
1332 } 2403 }
1333 else if (w->repeat) 2404 else if (w->repeat)
2405 {
2406 ev_at (w) = w->repeat;
1334 ev_timer_start (EV_A_ w); 2407 ev_timer_start (EV_A_ w);
1335} 2408 }
1336 2409
1337void 2410 EV_FREQUENT_CHECK;
2411}
2412
2413#if EV_PERIODIC_ENABLE
2414void noinline
1338ev_periodic_start (EV_P_ struct ev_periodic *w) 2415ev_periodic_start (EV_P_ ev_periodic *w)
1339{ 2416{
1340 if (ev_is_active (w)) 2417 if (expect_false (ev_is_active (w)))
1341 return; 2418 return;
1342 2419
1343 if (w->reschedule_cb) 2420 if (w->reschedule_cb)
1344 ((WT)w)->at = w->reschedule_cb (w, rt_now); 2421 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1345 else if (w->interval) 2422 else if (w->interval)
1346 { 2423 {
1347 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2424 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1348 /* this formula differs from the one in periodic_reify because we do not always round up */ 2425 /* this formula differs from the one in periodic_reify because we do not always round up */
1349 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; 2426 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1350 } 2427 }
2428 else
2429 ev_at (w) = w->offset;
1351 2430
2431 EV_FREQUENT_CHECK;
2432
2433 ++periodiccnt;
1352 ev_start (EV_A_ (W)w, ++periodiccnt); 2434 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1353 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); 2435 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1354 periodics [periodiccnt - 1] = w; 2436 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1355 upheap ((WT *)periodics, periodiccnt - 1); 2437 ANHE_at_cache (periodics [ev_active (w)]);
2438 upheap (periodics, ev_active (w));
1356 2439
2440 EV_FREQUENT_CHECK;
2441
1357 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2442 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1358} 2443}
1359 2444
1360void 2445void noinline
1361ev_periodic_stop (EV_P_ struct ev_periodic *w) 2446ev_periodic_stop (EV_P_ ev_periodic *w)
1362{ 2447{
1363 ev_clear_pending (EV_A_ (W)w); 2448 clear_pending (EV_A_ (W)w);
1364 if (!ev_is_active (w)) 2449 if (expect_false (!ev_is_active (w)))
1365 return; 2450 return;
1366 2451
2452 EV_FREQUENT_CHECK;
2453
2454 {
2455 int active = ev_active (w);
2456
1367 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2457 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1368 2458
1369 if (((W)w)->active < periodiccnt--) 2459 --periodiccnt;
2460
2461 if (expect_true (active < periodiccnt + HEAP0))
1370 { 2462 {
1371 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2463 periodics [active] = periodics [periodiccnt + HEAP0];
1372 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2464 adjustheap (periodics, periodiccnt, active);
1373 } 2465 }
2466 }
2467
2468 EV_FREQUENT_CHECK;
1374 2469
1375 ev_stop (EV_A_ (W)w); 2470 ev_stop (EV_A_ (W)w);
1376} 2471}
1377 2472
1378void 2473void noinline
1379ev_periodic_again (EV_P_ struct ev_periodic *w) 2474ev_periodic_again (EV_P_ ev_periodic *w)
1380{ 2475{
2476 /* TODO: use adjustheap and recalculation */
1381 ev_periodic_stop (EV_A_ w); 2477 ev_periodic_stop (EV_A_ w);
1382 ev_periodic_start (EV_A_ w); 2478 ev_periodic_start (EV_A_ w);
1383} 2479}
1384 2480#endif
1385void
1386ev_idle_start (EV_P_ struct ev_idle *w)
1387{
1388 if (ev_is_active (w))
1389 return;
1390
1391 ev_start (EV_A_ (W)w, ++idlecnt);
1392 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1393 idles [idlecnt - 1] = w;
1394}
1395
1396void
1397ev_idle_stop (EV_P_ struct ev_idle *w)
1398{
1399 ev_clear_pending (EV_A_ (W)w);
1400 if (ev_is_active (w))
1401 return;
1402
1403 idles [((W)w)->active - 1] = idles [--idlecnt];
1404 ev_stop (EV_A_ (W)w);
1405}
1406
1407void
1408ev_prepare_start (EV_P_ struct ev_prepare *w)
1409{
1410 if (ev_is_active (w))
1411 return;
1412
1413 ev_start (EV_A_ (W)w, ++preparecnt);
1414 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1415 prepares [preparecnt - 1] = w;
1416}
1417
1418void
1419ev_prepare_stop (EV_P_ struct ev_prepare *w)
1420{
1421 ev_clear_pending (EV_A_ (W)w);
1422 if (ev_is_active (w))
1423 return;
1424
1425 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1426 ev_stop (EV_A_ (W)w);
1427}
1428
1429void
1430ev_check_start (EV_P_ struct ev_check *w)
1431{
1432 if (ev_is_active (w))
1433 return;
1434
1435 ev_start (EV_A_ (W)w, ++checkcnt);
1436 array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1437 checks [checkcnt - 1] = w;
1438}
1439
1440void
1441ev_check_stop (EV_P_ struct ev_check *w)
1442{
1443 ev_clear_pending (EV_A_ (W)w);
1444 if (ev_is_active (w))
1445 return;
1446
1447 checks [((W)w)->active - 1] = checks [--checkcnt];
1448 ev_stop (EV_A_ (W)w);
1449}
1450 2481
1451#ifndef SA_RESTART 2482#ifndef SA_RESTART
1452# define SA_RESTART 0 2483# define SA_RESTART 0
1453#endif 2484#endif
1454 2485
1455void 2486void noinline
1456ev_signal_start (EV_P_ struct ev_signal *w) 2487ev_signal_start (EV_P_ ev_signal *w)
1457{ 2488{
1458#if EV_MULTIPLICITY 2489#if EV_MULTIPLICITY
1459 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2490 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1460#endif 2491#endif
1461 if (ev_is_active (w)) 2492 if (expect_false (ev_is_active (w)))
1462 return; 2493 return;
1463 2494
1464 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2495 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2496
2497 evpipe_init (EV_A);
2498
2499 EV_FREQUENT_CHECK;
2500
2501 {
2502#ifndef _WIN32
2503 sigset_t full, prev;
2504 sigfillset (&full);
2505 sigprocmask (SIG_SETMASK, &full, &prev);
2506#endif
2507
2508 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2509
2510#ifndef _WIN32
2511 sigprocmask (SIG_SETMASK, &prev, 0);
2512#endif
2513 }
1465 2514
1466 ev_start (EV_A_ (W)w, 1); 2515 ev_start (EV_A_ (W)w, 1);
1467 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1468 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2516 wlist_add (&signals [w->signum - 1].head, (WL)w);
1469 2517
1470 if (!((WL)w)->next) 2518 if (!((WL)w)->next)
1471 { 2519 {
1472#if WIN32 2520#if _WIN32
1473 signal (w->signum, sighandler); 2521 signal (w->signum, ev_sighandler);
1474#else 2522#else
1475 struct sigaction sa; 2523 struct sigaction sa;
1476 sa.sa_handler = sighandler; 2524 sa.sa_handler = ev_sighandler;
1477 sigfillset (&sa.sa_mask); 2525 sigfillset (&sa.sa_mask);
1478 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2526 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1479 sigaction (w->signum, &sa, 0); 2527 sigaction (w->signum, &sa, 0);
1480#endif 2528#endif
1481 } 2529 }
1482}
1483 2530
1484void 2531 EV_FREQUENT_CHECK;
2532}
2533
2534void noinline
1485ev_signal_stop (EV_P_ struct ev_signal *w) 2535ev_signal_stop (EV_P_ ev_signal *w)
1486{ 2536{
1487 ev_clear_pending (EV_A_ (W)w); 2537 clear_pending (EV_A_ (W)w);
1488 if (!ev_is_active (w)) 2538 if (expect_false (!ev_is_active (w)))
1489 return; 2539 return;
1490 2540
2541 EV_FREQUENT_CHECK;
2542
1491 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2543 wlist_del (&signals [w->signum - 1].head, (WL)w);
1492 ev_stop (EV_A_ (W)w); 2544 ev_stop (EV_A_ (W)w);
1493 2545
1494 if (!signals [w->signum - 1].head) 2546 if (!signals [w->signum - 1].head)
1495 signal (w->signum, SIG_DFL); 2547 signal (w->signum, SIG_DFL);
1496}
1497 2548
2549 EV_FREQUENT_CHECK;
2550}
2551
1498void 2552void
1499ev_child_start (EV_P_ struct ev_child *w) 2553ev_child_start (EV_P_ ev_child *w)
1500{ 2554{
1501#if EV_MULTIPLICITY 2555#if EV_MULTIPLICITY
1502 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2556 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1503#endif 2557#endif
1504 if (ev_is_active (w)) 2558 if (expect_false (ev_is_active (w)))
1505 return; 2559 return;
1506 2560
2561 EV_FREQUENT_CHECK;
2562
1507 ev_start (EV_A_ (W)w, 1); 2563 ev_start (EV_A_ (W)w, 1);
1508 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2564 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1509}
1510 2565
2566 EV_FREQUENT_CHECK;
2567}
2568
1511void 2569void
1512ev_child_stop (EV_P_ struct ev_child *w) 2570ev_child_stop (EV_P_ ev_child *w)
1513{ 2571{
1514 ev_clear_pending (EV_A_ (W)w); 2572 clear_pending (EV_A_ (W)w);
1515 if (ev_is_active (w)) 2573 if (expect_false (!ev_is_active (w)))
1516 return; 2574 return;
1517 2575
2576 EV_FREQUENT_CHECK;
2577
1518 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2578 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1519 ev_stop (EV_A_ (W)w); 2579 ev_stop (EV_A_ (W)w);
2580
2581 EV_FREQUENT_CHECK;
1520} 2582}
2583
2584#if EV_STAT_ENABLE
2585
2586# ifdef _WIN32
2587# undef lstat
2588# define lstat(a,b) _stati64 (a,b)
2589# endif
2590
2591#define DEF_STAT_INTERVAL 5.0074891
2592#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2593#define MIN_STAT_INTERVAL 0.1074891
2594
2595static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2596
2597#if EV_USE_INOTIFY
2598# define EV_INOTIFY_BUFSIZE 8192
2599
2600static void noinline
2601infy_add (EV_P_ ev_stat *w)
2602{
2603 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);
2604
2605 if (w->wd < 0)
2606 {
2607 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2608 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2609
2610 /* monitor some parent directory for speedup hints */
2611 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2612 /* but an efficiency issue only */
2613 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2614 {
2615 char path [4096];
2616 strcpy (path, w->path);
2617
2618 do
2619 {
2620 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2621 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2622
2623 char *pend = strrchr (path, '/');
2624
2625 if (!pend || pend == path)
2626 break;
2627
2628 *pend = 0;
2629 w->wd = inotify_add_watch (fs_fd, path, mask);
2630 }
2631 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2632 }
2633 }
2634
2635 if (w->wd >= 0)
2636 {
2637 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2638
2639 /* now local changes will be tracked by inotify, but remote changes won't */
2640 /* unless the filesystem it known to be local, we therefore still poll */
2641 /* also do poll on <2.6.25, but with normal frequency */
2642 struct statfs sfs;
2643
2644 if (fs_2625 && !statfs (w->path, &sfs))
2645 if (sfs.f_type == 0x1373 /* devfs */
2646 || sfs.f_type == 0xEF53 /* ext2/3 */
2647 || sfs.f_type == 0x3153464a /* jfs */
2648 || sfs.f_type == 0x52654973 /* reiser3 */
2649 || sfs.f_type == 0x01021994 /* tempfs */
2650 || sfs.f_type == 0x58465342 /* xfs */)
2651 return;
2652
2653 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2654 ev_timer_again (EV_A_ &w->timer);
2655 }
2656}
2657
2658static void noinline
2659infy_del (EV_P_ ev_stat *w)
2660{
2661 int slot;
2662 int wd = w->wd;
2663
2664 if (wd < 0)
2665 return;
2666
2667 w->wd = -2;
2668 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2669 wlist_del (&fs_hash [slot].head, (WL)w);
2670
2671 /* remove this watcher, if others are watching it, they will rearm */
2672 inotify_rm_watch (fs_fd, wd);
2673}
2674
2675static void noinline
2676infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2677{
2678 if (slot < 0)
2679 /* overflow, need to check for all hash slots */
2680 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2681 infy_wd (EV_A_ slot, wd, ev);
2682 else
2683 {
2684 WL w_;
2685
2686 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2687 {
2688 ev_stat *w = (ev_stat *)w_;
2689 w_ = w_->next; /* lets us remove this watcher and all before it */
2690
2691 if (w->wd == wd || wd == -1)
2692 {
2693 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2694 {
2695 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2696 w->wd = -1;
2697 infy_add (EV_A_ w); /* re-add, no matter what */
2698 }
2699
2700 stat_timer_cb (EV_A_ &w->timer, 0);
2701 }
2702 }
2703 }
2704}
2705
2706static void
2707infy_cb (EV_P_ ev_io *w, int revents)
2708{
2709 char buf [EV_INOTIFY_BUFSIZE];
2710 struct inotify_event *ev = (struct inotify_event *)buf;
2711 int ofs;
2712 int len = read (fs_fd, buf, sizeof (buf));
2713
2714 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2715 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2716}
2717
2718inline_size void
2719check_2625 (EV_P)
2720{
2721 /* kernels < 2.6.25 are borked
2722 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2723 */
2724 struct utsname buf;
2725 int major, minor, micro;
2726
2727 if (uname (&buf))
2728 return;
2729
2730 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2731 return;
2732
2733 if (major < 2
2734 || (major == 2 && minor < 6)
2735 || (major == 2 && minor == 6 && micro < 25))
2736 return;
2737
2738 fs_2625 = 1;
2739}
2740
2741inline_size void
2742infy_init (EV_P)
2743{
2744 if (fs_fd != -2)
2745 return;
2746
2747 fs_fd = -1;
2748
2749 check_2625 (EV_A);
2750
2751 fs_fd = inotify_init ();
2752
2753 if (fs_fd >= 0)
2754 {
2755 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2756 ev_set_priority (&fs_w, EV_MAXPRI);
2757 ev_io_start (EV_A_ &fs_w);
2758 }
2759}
2760
2761inline_size void
2762infy_fork (EV_P)
2763{
2764 int slot;
2765
2766 if (fs_fd < 0)
2767 return;
2768
2769 close (fs_fd);
2770 fs_fd = inotify_init ();
2771
2772 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2773 {
2774 WL w_ = fs_hash [slot].head;
2775 fs_hash [slot].head = 0;
2776
2777 while (w_)
2778 {
2779 ev_stat *w = (ev_stat *)w_;
2780 w_ = w_->next; /* lets us add this watcher */
2781
2782 w->wd = -1;
2783
2784 if (fs_fd >= 0)
2785 infy_add (EV_A_ w); /* re-add, no matter what */
2786 else
2787 ev_timer_again (EV_A_ &w->timer);
2788 }
2789 }
2790}
2791
2792#endif
2793
2794#ifdef _WIN32
2795# define EV_LSTAT(p,b) _stati64 (p, b)
2796#else
2797# define EV_LSTAT(p,b) lstat (p, b)
2798#endif
2799
2800void
2801ev_stat_stat (EV_P_ ev_stat *w)
2802{
2803 if (lstat (w->path, &w->attr) < 0)
2804 w->attr.st_nlink = 0;
2805 else if (!w->attr.st_nlink)
2806 w->attr.st_nlink = 1;
2807}
2808
2809static void noinline
2810stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2811{
2812 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2813
2814 /* we copy this here each the time so that */
2815 /* prev has the old value when the callback gets invoked */
2816 w->prev = w->attr;
2817 ev_stat_stat (EV_A_ w);
2818
2819 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2820 if (
2821 w->prev.st_dev != w->attr.st_dev
2822 || w->prev.st_ino != w->attr.st_ino
2823 || w->prev.st_mode != w->attr.st_mode
2824 || w->prev.st_nlink != w->attr.st_nlink
2825 || w->prev.st_uid != w->attr.st_uid
2826 || w->prev.st_gid != w->attr.st_gid
2827 || w->prev.st_rdev != w->attr.st_rdev
2828 || w->prev.st_size != w->attr.st_size
2829 || w->prev.st_atime != w->attr.st_atime
2830 || w->prev.st_mtime != w->attr.st_mtime
2831 || w->prev.st_ctime != w->attr.st_ctime
2832 ) {
2833 #if EV_USE_INOTIFY
2834 if (fs_fd >= 0)
2835 {
2836 infy_del (EV_A_ w);
2837 infy_add (EV_A_ w);
2838 ev_stat_stat (EV_A_ w); /* avoid race... */
2839 }
2840 #endif
2841
2842 ev_feed_event (EV_A_ w, EV_STAT);
2843 }
2844}
2845
2846void
2847ev_stat_start (EV_P_ ev_stat *w)
2848{
2849 if (expect_false (ev_is_active (w)))
2850 return;
2851
2852 ev_stat_stat (EV_A_ w);
2853
2854 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2855 w->interval = MIN_STAT_INTERVAL;
2856
2857 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2858 ev_set_priority (&w->timer, ev_priority (w));
2859
2860#if EV_USE_INOTIFY
2861 infy_init (EV_A);
2862
2863 if (fs_fd >= 0)
2864 infy_add (EV_A_ w);
2865 else
2866#endif
2867 ev_timer_again (EV_A_ &w->timer);
2868
2869 ev_start (EV_A_ (W)w, 1);
2870
2871 EV_FREQUENT_CHECK;
2872}
2873
2874void
2875ev_stat_stop (EV_P_ ev_stat *w)
2876{
2877 clear_pending (EV_A_ (W)w);
2878 if (expect_false (!ev_is_active (w)))
2879 return;
2880
2881 EV_FREQUENT_CHECK;
2882
2883#if EV_USE_INOTIFY
2884 infy_del (EV_A_ w);
2885#endif
2886 ev_timer_stop (EV_A_ &w->timer);
2887
2888 ev_stop (EV_A_ (W)w);
2889
2890 EV_FREQUENT_CHECK;
2891}
2892#endif
2893
2894#if EV_IDLE_ENABLE
2895void
2896ev_idle_start (EV_P_ ev_idle *w)
2897{
2898 if (expect_false (ev_is_active (w)))
2899 return;
2900
2901 pri_adjust (EV_A_ (W)w);
2902
2903 EV_FREQUENT_CHECK;
2904
2905 {
2906 int active = ++idlecnt [ABSPRI (w)];
2907
2908 ++idleall;
2909 ev_start (EV_A_ (W)w, active);
2910
2911 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2912 idles [ABSPRI (w)][active - 1] = w;
2913 }
2914
2915 EV_FREQUENT_CHECK;
2916}
2917
2918void
2919ev_idle_stop (EV_P_ ev_idle *w)
2920{
2921 clear_pending (EV_A_ (W)w);
2922 if (expect_false (!ev_is_active (w)))
2923 return;
2924
2925 EV_FREQUENT_CHECK;
2926
2927 {
2928 int active = ev_active (w);
2929
2930 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2931 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2932
2933 ev_stop (EV_A_ (W)w);
2934 --idleall;
2935 }
2936
2937 EV_FREQUENT_CHECK;
2938}
2939#endif
2940
2941void
2942ev_prepare_start (EV_P_ ev_prepare *w)
2943{
2944 if (expect_false (ev_is_active (w)))
2945 return;
2946
2947 EV_FREQUENT_CHECK;
2948
2949 ev_start (EV_A_ (W)w, ++preparecnt);
2950 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2951 prepares [preparecnt - 1] = w;
2952
2953 EV_FREQUENT_CHECK;
2954}
2955
2956void
2957ev_prepare_stop (EV_P_ ev_prepare *w)
2958{
2959 clear_pending (EV_A_ (W)w);
2960 if (expect_false (!ev_is_active (w)))
2961 return;
2962
2963 EV_FREQUENT_CHECK;
2964
2965 {
2966 int active = ev_active (w);
2967
2968 prepares [active - 1] = prepares [--preparecnt];
2969 ev_active (prepares [active - 1]) = active;
2970 }
2971
2972 ev_stop (EV_A_ (W)w);
2973
2974 EV_FREQUENT_CHECK;
2975}
2976
2977void
2978ev_check_start (EV_P_ ev_check *w)
2979{
2980 if (expect_false (ev_is_active (w)))
2981 return;
2982
2983 EV_FREQUENT_CHECK;
2984
2985 ev_start (EV_A_ (W)w, ++checkcnt);
2986 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2987 checks [checkcnt - 1] = w;
2988
2989 EV_FREQUENT_CHECK;
2990}
2991
2992void
2993ev_check_stop (EV_P_ ev_check *w)
2994{
2995 clear_pending (EV_A_ (W)w);
2996 if (expect_false (!ev_is_active (w)))
2997 return;
2998
2999 EV_FREQUENT_CHECK;
3000
3001 {
3002 int active = ev_active (w);
3003
3004 checks [active - 1] = checks [--checkcnt];
3005 ev_active (checks [active - 1]) = active;
3006 }
3007
3008 ev_stop (EV_A_ (W)w);
3009
3010 EV_FREQUENT_CHECK;
3011}
3012
3013#if EV_EMBED_ENABLE
3014void noinline
3015ev_embed_sweep (EV_P_ ev_embed *w)
3016{
3017 ev_loop (w->other, EVLOOP_NONBLOCK);
3018}
3019
3020static void
3021embed_io_cb (EV_P_ ev_io *io, int revents)
3022{
3023 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3024
3025 if (ev_cb (w))
3026 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3027 else
3028 ev_loop (w->other, EVLOOP_NONBLOCK);
3029}
3030
3031static void
3032embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3033{
3034 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3035
3036 {
3037 struct ev_loop *loop = w->other;
3038
3039 while (fdchangecnt)
3040 {
3041 fd_reify (EV_A);
3042 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3043 }
3044 }
3045}
3046
3047static void
3048embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3049{
3050 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3051
3052 ev_embed_stop (EV_A_ w);
3053
3054 {
3055 struct ev_loop *loop = w->other;
3056
3057 ev_loop_fork (EV_A);
3058 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3059 }
3060
3061 ev_embed_start (EV_A_ w);
3062}
3063
3064#if 0
3065static void
3066embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3067{
3068 ev_idle_stop (EV_A_ idle);
3069}
3070#endif
3071
3072void
3073ev_embed_start (EV_P_ ev_embed *w)
3074{
3075 if (expect_false (ev_is_active (w)))
3076 return;
3077
3078 {
3079 struct ev_loop *loop = w->other;
3080 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3081 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3082 }
3083
3084 EV_FREQUENT_CHECK;
3085
3086 ev_set_priority (&w->io, ev_priority (w));
3087 ev_io_start (EV_A_ &w->io);
3088
3089 ev_prepare_init (&w->prepare, embed_prepare_cb);
3090 ev_set_priority (&w->prepare, EV_MINPRI);
3091 ev_prepare_start (EV_A_ &w->prepare);
3092
3093 ev_fork_init (&w->fork, embed_fork_cb);
3094 ev_fork_start (EV_A_ &w->fork);
3095
3096 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3097
3098 ev_start (EV_A_ (W)w, 1);
3099
3100 EV_FREQUENT_CHECK;
3101}
3102
3103void
3104ev_embed_stop (EV_P_ ev_embed *w)
3105{
3106 clear_pending (EV_A_ (W)w);
3107 if (expect_false (!ev_is_active (w)))
3108 return;
3109
3110 EV_FREQUENT_CHECK;
3111
3112 ev_io_stop (EV_A_ &w->io);
3113 ev_prepare_stop (EV_A_ &w->prepare);
3114 ev_fork_stop (EV_A_ &w->fork);
3115
3116 EV_FREQUENT_CHECK;
3117}
3118#endif
3119
3120#if EV_FORK_ENABLE
3121void
3122ev_fork_start (EV_P_ ev_fork *w)
3123{
3124 if (expect_false (ev_is_active (w)))
3125 return;
3126
3127 EV_FREQUENT_CHECK;
3128
3129 ev_start (EV_A_ (W)w, ++forkcnt);
3130 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3131 forks [forkcnt - 1] = w;
3132
3133 EV_FREQUENT_CHECK;
3134}
3135
3136void
3137ev_fork_stop (EV_P_ ev_fork *w)
3138{
3139 clear_pending (EV_A_ (W)w);
3140 if (expect_false (!ev_is_active (w)))
3141 return;
3142
3143 EV_FREQUENT_CHECK;
3144
3145 {
3146 int active = ev_active (w);
3147
3148 forks [active - 1] = forks [--forkcnt];
3149 ev_active (forks [active - 1]) = active;
3150 }
3151
3152 ev_stop (EV_A_ (W)w);
3153
3154 EV_FREQUENT_CHECK;
3155}
3156#endif
3157
3158#if EV_ASYNC_ENABLE
3159void
3160ev_async_start (EV_P_ ev_async *w)
3161{
3162 if (expect_false (ev_is_active (w)))
3163 return;
3164
3165 evpipe_init (EV_A);
3166
3167 EV_FREQUENT_CHECK;
3168
3169 ev_start (EV_A_ (W)w, ++asynccnt);
3170 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3171 asyncs [asynccnt - 1] = w;
3172
3173 EV_FREQUENT_CHECK;
3174}
3175
3176void
3177ev_async_stop (EV_P_ ev_async *w)
3178{
3179 clear_pending (EV_A_ (W)w);
3180 if (expect_false (!ev_is_active (w)))
3181 return;
3182
3183 EV_FREQUENT_CHECK;
3184
3185 {
3186 int active = ev_active (w);
3187
3188 asyncs [active - 1] = asyncs [--asynccnt];
3189 ev_active (asyncs [active - 1]) = active;
3190 }
3191
3192 ev_stop (EV_A_ (W)w);
3193
3194 EV_FREQUENT_CHECK;
3195}
3196
3197void
3198ev_async_send (EV_P_ ev_async *w)
3199{
3200 w->sent = 1;
3201 evpipe_write (EV_A_ &gotasync);
3202}
3203#endif
1521 3204
1522/*****************************************************************************/ 3205/*****************************************************************************/
1523 3206
1524struct ev_once 3207struct ev_once
1525{ 3208{
1526 struct ev_io io; 3209 ev_io io;
1527 struct ev_timer to; 3210 ev_timer to;
1528 void (*cb)(int revents, void *arg); 3211 void (*cb)(int revents, void *arg);
1529 void *arg; 3212 void *arg;
1530}; 3213};
1531 3214
1532static void 3215static void
1533once_cb (EV_P_ struct ev_once *once, int revents) 3216once_cb (EV_P_ struct ev_once *once, int revents)
1534{ 3217{
1535 void (*cb)(int revents, void *arg) = once->cb; 3218 void (*cb)(int revents, void *arg) = once->cb;
1536 void *arg = once->arg; 3219 void *arg = once->arg;
1537 3220
1538 ev_io_stop (EV_A_ &once->io); 3221 ev_io_stop (EV_A_ &once->io);
1539 ev_timer_stop (EV_A_ &once->to); 3222 ev_timer_stop (EV_A_ &once->to);
1540 ev_free (once); 3223 ev_free (once);
1541 3224
1542 cb (revents, arg); 3225 cb (revents, arg);
1543} 3226}
1544 3227
1545static void 3228static void
1546once_cb_io (EV_P_ struct ev_io *w, int revents) 3229once_cb_io (EV_P_ ev_io *w, int revents)
1547{ 3230{
1548 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3231 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3232
3233 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1549} 3234}
1550 3235
1551static void 3236static void
1552once_cb_to (EV_P_ struct ev_timer *w, int revents) 3237once_cb_to (EV_P_ ev_timer *w, int revents)
1553{ 3238{
1554 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3239 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3240
3241 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1555} 3242}
1556 3243
1557void 3244void
1558ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3245ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1559{ 3246{
1560 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3247 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1561 3248
1562 if (!once) 3249 if (expect_false (!once))
3250 {
1563 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3251 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1564 else 3252 return;
1565 { 3253 }
3254
1566 once->cb = cb; 3255 once->cb = cb;
1567 once->arg = arg; 3256 once->arg = arg;
1568 3257
1569 ev_init (&once->io, once_cb_io); 3258 ev_init (&once->io, once_cb_io);
1570 if (fd >= 0) 3259 if (fd >= 0)
3260 {
3261 ev_io_set (&once->io, fd, events);
3262 ev_io_start (EV_A_ &once->io);
3263 }
3264
3265 ev_init (&once->to, once_cb_to);
3266 if (timeout >= 0.)
3267 {
3268 ev_timer_set (&once->to, timeout, 0.);
3269 ev_timer_start (EV_A_ &once->to);
3270 }
3271}
3272
3273/*****************************************************************************/
3274
3275#if EV_WALK_ENABLE
3276void
3277ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3278{
3279 int i, j;
3280 ev_watcher_list *wl, *wn;
3281
3282 if (types & (EV_IO | EV_EMBED))
3283 for (i = 0; i < anfdmax; ++i)
3284 for (wl = anfds [i].head; wl; )
1571 { 3285 {
1572 ev_io_set (&once->io, fd, events); 3286 wn = wl->next;
1573 ev_io_start (EV_A_ &once->io); 3287
3288#if EV_EMBED_ENABLE
3289 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3290 {
3291 if (types & EV_EMBED)
3292 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3293 }
3294 else
3295#endif
3296#if EV_USE_INOTIFY
3297 if (ev_cb ((ev_io *)wl) == infy_cb)
3298 ;
3299 else
3300#endif
3301 if ((ev_io *)wl != &pipe_w)
3302 if (types & EV_IO)
3303 cb (EV_A_ EV_IO, wl);
3304
3305 wl = wn;
1574 } 3306 }
1575 3307
1576 ev_init (&once->to, once_cb_to); 3308 if (types & (EV_TIMER | EV_STAT))
1577 if (timeout >= 0.) 3309 for (i = timercnt + HEAP0; i-- > HEAP0; )
3310#if EV_STAT_ENABLE
3311 /*TODO: timer is not always active*/
3312 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1578 { 3313 {
1579 ev_timer_set (&once->to, timeout, 0.); 3314 if (types & EV_STAT)
1580 ev_timer_start (EV_A_ &once->to); 3315 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1581 } 3316 }
1582 } 3317 else
1583} 3318#endif
3319 if (types & EV_TIMER)
3320 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1584 3321
3322#if EV_PERIODIC_ENABLE
3323 if (types & EV_PERIODIC)
3324 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3325 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3326#endif
3327
3328#if EV_IDLE_ENABLE
3329 if (types & EV_IDLE)
3330 for (j = NUMPRI; i--; )
3331 for (i = idlecnt [j]; i--; )
3332 cb (EV_A_ EV_IDLE, idles [j][i]);
3333#endif
3334
3335#if EV_FORK_ENABLE
3336 if (types & EV_FORK)
3337 for (i = forkcnt; i--; )
3338 if (ev_cb (forks [i]) != embed_fork_cb)
3339 cb (EV_A_ EV_FORK, forks [i]);
3340#endif
3341
3342#if EV_ASYNC_ENABLE
3343 if (types & EV_ASYNC)
3344 for (i = asynccnt; i--; )
3345 cb (EV_A_ EV_ASYNC, asyncs [i]);
3346#endif
3347
3348 if (types & EV_PREPARE)
3349 for (i = preparecnt; i--; )
3350#if EV_EMBED_ENABLE
3351 if (ev_cb (prepares [i]) != embed_prepare_cb)
3352#endif
3353 cb (EV_A_ EV_PREPARE, prepares [i]);
3354
3355 if (types & EV_CHECK)
3356 for (i = checkcnt; i--; )
3357 cb (EV_A_ EV_CHECK, checks [i]);
3358
3359 if (types & EV_SIGNAL)
3360 for (i = 0; i < signalmax; ++i)
3361 for (wl = signals [i].head; wl; )
3362 {
3363 wn = wl->next;
3364 cb (EV_A_ EV_SIGNAL, wl);
3365 wl = wn;
3366 }
3367
3368 if (types & EV_CHILD)
3369 for (i = EV_PID_HASHSIZE; i--; )
3370 for (wl = childs [i]; wl; )
3371 {
3372 wn = wl->next;
3373 cb (EV_A_ EV_CHILD, wl);
3374 wl = wn;
3375 }
3376/* EV_STAT 0x00001000 /* stat data changed */
3377/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3378}
3379#endif
3380
3381#if EV_MULTIPLICITY
3382 #include "ev_wrap.h"
3383#endif
3384
3385#ifdef __cplusplus
3386}
3387#endif
3388

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