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Comparing libev/ev.c (file contents):
Revision 1.105 by root, Mon Nov 12 01:02:09 2007 UTC vs.
Revision 1.294 by root, Wed Jul 8 02:46:05 2009 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
31 39
32#ifdef __cplusplus 40#ifdef __cplusplus
33extern "C" { 41extern "C" {
34#endif 42#endif
35 43
44/* this big block deduces configuration from config.h */
36#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
37# include "config.h" 49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 0
57# endif
58# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1
60# endif
61# endif
62# elif !defined(EV_USE_CLOCK_SYSCALL)
63# define EV_USE_CLOCK_SYSCALL 0
64# endif
38 65
39# if HAVE_CLOCK_GETTIME 66# if HAVE_CLOCK_GETTIME
40# ifndef EV_USE_MONOTONIC 67# ifndef EV_USE_MONOTONIC
41# define EV_USE_MONOTONIC 1 68# define EV_USE_MONOTONIC 1
42# endif 69# endif
43# ifndef EV_USE_REALTIME 70# ifndef EV_USE_REALTIME
44# define EV_USE_REALTIME 1 71# define EV_USE_REALTIME 0
72# endif
73# else
74# ifndef EV_USE_MONOTONIC
75# define EV_USE_MONOTONIC 0
76# endif
77# ifndef EV_USE_REALTIME
78# define EV_USE_REALTIME 0
45# endif 79# endif
46# endif 80# endif
47 81
48# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT) 82# ifndef EV_USE_NANOSLEEP
83# if HAVE_NANOSLEEP
49# define EV_USE_SELECT 1 84# define EV_USE_NANOSLEEP 1
85# else
86# define EV_USE_NANOSLEEP 0
87# endif
50# endif 88# endif
51 89
52# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL) && !defined (__APPLE__) 90# ifndef EV_USE_SELECT
91# if HAVE_SELECT && HAVE_SYS_SELECT_H
53# define EV_USE_POLL 1 92# define EV_USE_SELECT 1
93# else
94# define EV_USE_SELECT 0
95# endif
54# endif 96# endif
55 97
56# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL) 98# ifndef EV_USE_POLL
99# if HAVE_POLL && HAVE_POLL_H
57# define EV_USE_EPOLL 1 100# define EV_USE_POLL 1
101# else
102# define EV_USE_POLL 0
103# endif
58# endif 104# endif
59 105
60# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE) && !defined (__APPLE__) 106# ifndef EV_USE_EPOLL
107# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
61# define EV_USE_KQUEUE 1 108# define EV_USE_EPOLL 1
109# else
110# define EV_USE_EPOLL 0
111# endif
62# endif 112# endif
113
114# ifndef EV_USE_KQUEUE
115# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
116# define EV_USE_KQUEUE 1
117# else
118# define EV_USE_KQUEUE 0
119# endif
120# endif
121
122# ifndef EV_USE_PORT
123# if HAVE_PORT_H && HAVE_PORT_CREATE
124# define EV_USE_PORT 1
125# else
126# define EV_USE_PORT 0
127# endif
128# endif
63 129
130# ifndef EV_USE_INOTIFY
131# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
132# define EV_USE_INOTIFY 1
133# else
134# define EV_USE_INOTIFY 0
135# endif
136# endif
137
138# ifndef EV_USE_EVENTFD
139# if HAVE_EVENTFD
140# define EV_USE_EVENTFD 1
141# else
142# define EV_USE_EVENTFD 0
143# endif
144# endif
145
64#endif 146#endif
65 147
66#include <math.h> 148#include <math.h>
67#include <stdlib.h> 149#include <stdlib.h>
68#include <fcntl.h> 150#include <fcntl.h>
… …
75#include <sys/types.h> 157#include <sys/types.h>
76#include <time.h> 158#include <time.h>
77 159
78#include <signal.h> 160#include <signal.h>
79 161
162#ifdef EV_H
163# include EV_H
164#else
165# include "ev.h"
166#endif
167
80#ifndef _WIN32 168#ifndef _WIN32
81# include <unistd.h>
82# include <sys/time.h> 169# include <sys/time.h>
83# include <sys/wait.h> 170# include <sys/wait.h>
171# include <unistd.h>
84#else 172#else
173# include <io.h>
85# define WIN32_LEAN_AND_MEAN 174# define WIN32_LEAN_AND_MEAN
86# include <windows.h> 175# include <windows.h>
87# ifndef EV_SELECT_IS_WINSOCKET 176# ifndef EV_SELECT_IS_WINSOCKET
88# define EV_SELECT_IS_WINSOCKET 1 177# define EV_SELECT_IS_WINSOCKET 1
89# endif 178# endif
90#endif 179#endif
91 180
92/**/ 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
93 190
94#ifndef EV_USE_MONOTONIC 191#ifndef EV_USE_MONOTONIC
192# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
95# define EV_USE_MONOTONIC 1 193# 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
96#endif 209#endif
97 210
98#ifndef EV_USE_SELECT 211#ifndef EV_USE_SELECT
99# define EV_USE_SELECT 1 212# define EV_USE_SELECT 1
100# define EV_SELECT_USE_FD_SET 1
101#endif 213#endif
102 214
103#ifndef EV_USE_POLL 215#ifndef EV_USE_POLL
104# ifdef _WIN32 216# ifdef _WIN32
105# define EV_USE_POLL 0 217# define EV_USE_POLL 0
… …
107# define EV_USE_POLL 1 219# define EV_USE_POLL 1
108# endif 220# endif
109#endif 221#endif
110 222
111#ifndef EV_USE_EPOLL 223#ifndef EV_USE_EPOLL
224# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
225# define EV_USE_EPOLL 1
226# else
112# define EV_USE_EPOLL 0 227# define EV_USE_EPOLL 0
228# endif
113#endif 229#endif
114 230
115#ifndef EV_USE_KQUEUE 231#ifndef EV_USE_KQUEUE
116# define EV_USE_KQUEUE 0 232# define EV_USE_KQUEUE 0
117#endif 233#endif
118 234
119#ifndef EV_USE_REALTIME 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))
120# define EV_USE_REALTIME 1 241# define EV_USE_INOTIFY 1
242# else
243# define EV_USE_INOTIFY 0
121#endif 244# endif
245#endif
122 246
123/**/ 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 */
124 304
125#ifndef CLOCK_MONOTONIC 305#ifndef CLOCK_MONOTONIC
126# undef EV_USE_MONOTONIC 306# undef EV_USE_MONOTONIC
127# define EV_USE_MONOTONIC 0 307# define EV_USE_MONOTONIC 0
128#endif 308#endif
… …
130#ifndef CLOCK_REALTIME 310#ifndef CLOCK_REALTIME
131# undef EV_USE_REALTIME 311# undef EV_USE_REALTIME
132# define EV_USE_REALTIME 0 312# define EV_USE_REALTIME 0
133#endif 313#endif
134 314
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
135#if EV_SELECT_IS_WINSOCKET 337#if EV_SELECT_IS_WINSOCKET
136# include <winsock.h> 338# include <winsock.h>
137#endif 339#endif
138 340
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
139/**/ 353/**/
140 354
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
141#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 371#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
142#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 372#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
143#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
144/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ 373/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
145 374
146#ifdef EV_H
147# include EV_H
148#else
149# include "ev.h"
150#endif
151
152#if __GNUC__ >= 3 375#if __GNUC__ >= 4
153# define expect(expr,value) __builtin_expect ((expr),(value)) 376# define expect(expr,value) __builtin_expect ((expr),(value))
154# define inline inline 377# define noinline __attribute__ ((noinline))
155#else 378#else
156# define expect(expr,value) (expr) 379# define expect(expr,value) (expr)
157# define inline static 380# define noinline
381# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
382# define inline
383# endif
158#endif 384#endif
159 385
160#define expect_false(expr) expect ((expr) != 0, 0) 386#define expect_false(expr) expect ((expr) != 0, 0)
161#define expect_true(expr) expect ((expr) != 0, 1) 387#define expect_true(expr) expect ((expr) != 0, 1)
388#define inline_size static inline
389
390#if EV_MINIMAL
391# define inline_speed static noinline
392#else
393# define inline_speed static inline
394#endif
162 395
163#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 396#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
164#define ABSPRI(w) ((w)->priority - EV_MINPRI) 397#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
165 398
166#define EMPTY /* required for microsofts broken pseudo-c compiler */ 399#define EMPTY /* required for microsofts broken pseudo-c compiler */
400#define EMPTY2(a,b) /* used to suppress some warnings */
167 401
168typedef struct ev_watcher *W; 402typedef ev_watcher *W;
169typedef struct ev_watcher_list *WL; 403typedef ev_watcher_list *WL;
170typedef struct ev_watcher_time *WT; 404typedef ev_watcher_time *WT;
171 405
406#define ev_active(w) ((W)(w))->active
407#define ev_at(w) ((WT)(w))->at
408
409#if EV_USE_REALTIME
410/* sig_atomic_t is used to avoid per-thread variables or locking but still */
411/* giving it a reasonably high chance of working on typical architetcures */
412static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
413#endif
414
415#if EV_USE_MONOTONIC
172static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 416static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
417#endif
173 418
174#ifdef _WIN32 419#ifdef _WIN32
175# include "ev_win32.c" 420# include "ev_win32.c"
176#endif 421#endif
177 422
178/*****************************************************************************/ 423/*****************************************************************************/
179 424
180static void (*syserr_cb)(const char *msg); 425static void (*syserr_cb)(const char *msg);
181 426
427void
182void ev_set_syserr_cb (void (*cb)(const char *msg)) 428ev_set_syserr_cb (void (*cb)(const char *msg))
183{ 429{
184 syserr_cb = cb; 430 syserr_cb = cb;
185} 431}
186 432
187static void 433static void noinline
188syserr (const char *msg) 434ev_syserr (const char *msg)
189{ 435{
190 if (!msg) 436 if (!msg)
191 msg = "(libev) system error"; 437 msg = "(libev) system error";
192 438
193 if (syserr_cb) 439 if (syserr_cb)
… …
197 perror (msg); 443 perror (msg);
198 abort (); 444 abort ();
199 } 445 }
200} 446}
201 447
448static void *
449ev_realloc_emul (void *ptr, long size)
450{
451 /* some systems, notably openbsd and darwin, fail to properly
452 * implement realloc (x, 0) (as required by both ansi c-98 and
453 * the single unix specification, so work around them here.
454 */
455
456 if (size)
457 return realloc (ptr, size);
458
459 free (ptr);
460 return 0;
461}
462
202static void *(*alloc)(void *ptr, long size); 463static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
203 464
465void
204void ev_set_allocator (void *(*cb)(void *ptr, long size)) 466ev_set_allocator (void *(*cb)(void *ptr, long size))
205{ 467{
206 alloc = cb; 468 alloc = cb;
207} 469}
208 470
209static void * 471inline_speed void *
210ev_realloc (void *ptr, long size) 472ev_realloc (void *ptr, long size)
211{ 473{
212 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 474 ptr = alloc (ptr, size);
213 475
214 if (!ptr && size) 476 if (!ptr && size)
215 { 477 {
216 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 478 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
217 abort (); 479 abort ();
… …
223#define ev_malloc(size) ev_realloc (0, (size)) 485#define ev_malloc(size) ev_realloc (0, (size))
224#define ev_free(ptr) ev_realloc ((ptr), 0) 486#define ev_free(ptr) ev_realloc ((ptr), 0)
225 487
226/*****************************************************************************/ 488/*****************************************************************************/
227 489
490/* file descriptor info structure */
228typedef struct 491typedef struct
229{ 492{
230 WL head; 493 WL head;
231 unsigned char events; 494 unsigned char events; /* the events watched for */
495 unsigned char reify; /* flag set when this ANFD needs reification */
496 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
232 unsigned char reify; 497 unsigned char unused;
498#if EV_USE_EPOLL
499 unsigned int egen; /* generation counter to counter epoll bugs */
500#endif
233#if EV_SELECT_IS_WINSOCKET 501#if EV_SELECT_IS_WINSOCKET
234 SOCKET handle; 502 SOCKET handle;
235#endif 503#endif
236} ANFD; 504} ANFD;
237 505
506/* stores the pending event set for a given watcher */
238typedef struct 507typedef struct
239{ 508{
240 W w; 509 W w;
241 int events; 510 int events; /* the pending event set for the given watcher */
242} ANPENDING; 511} ANPENDING;
512
513#if EV_USE_INOTIFY
514/* hash table entry per inotify-id */
515typedef struct
516{
517 WL head;
518} ANFS;
519#endif
520
521/* Heap Entry */
522#if EV_HEAP_CACHE_AT
523 /* a heap element */
524 typedef struct {
525 ev_tstamp at;
526 WT w;
527 } ANHE;
528
529 #define ANHE_w(he) (he).w /* access watcher, read-write */
530 #define ANHE_at(he) (he).at /* access cached at, read-only */
531 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
532#else
533 /* a heap element */
534 typedef WT ANHE;
535
536 #define ANHE_w(he) (he)
537 #define ANHE_at(he) (he)->at
538 #define ANHE_at_cache(he)
539#endif
243 540
244#if EV_MULTIPLICITY 541#if EV_MULTIPLICITY
245 542
246 struct ev_loop 543 struct ev_loop
247 { 544 {
… …
251 #include "ev_vars.h" 548 #include "ev_vars.h"
252 #undef VAR 549 #undef VAR
253 }; 550 };
254 #include "ev_wrap.h" 551 #include "ev_wrap.h"
255 552
256 struct ev_loop default_loop_struct; 553 static struct ev_loop default_loop_struct;
257 static struct ev_loop *default_loop; 554 struct ev_loop *ev_default_loop_ptr;
258 555
259#else 556#else
260 557
261 ev_tstamp ev_rt_now; 558 ev_tstamp ev_rt_now;
262 #define VAR(name,decl) static decl; 559 #define VAR(name,decl) static decl;
263 #include "ev_vars.h" 560 #include "ev_vars.h"
264 #undef VAR 561 #undef VAR
265 562
266 static int default_loop; 563 static int ev_default_loop_ptr;
267 564
268#endif 565#endif
269 566
270/*****************************************************************************/ 567/*****************************************************************************/
271 568
569#ifndef EV_HAVE_EV_TIME
272ev_tstamp 570ev_tstamp
273ev_time (void) 571ev_time (void)
274{ 572{
275#if EV_USE_REALTIME 573#if EV_USE_REALTIME
574 if (expect_true (have_realtime))
575 {
276 struct timespec ts; 576 struct timespec ts;
277 clock_gettime (CLOCK_REALTIME, &ts); 577 clock_gettime (CLOCK_REALTIME, &ts);
278 return ts.tv_sec + ts.tv_nsec * 1e-9; 578 return ts.tv_sec + ts.tv_nsec * 1e-9;
279#else 579 }
580#endif
581
280 struct timeval tv; 582 struct timeval tv;
281 gettimeofday (&tv, 0); 583 gettimeofday (&tv, 0);
282 return tv.tv_sec + tv.tv_usec * 1e-6; 584 return tv.tv_sec + tv.tv_usec * 1e-6;
283#endif
284} 585}
586#endif
285 587
286inline ev_tstamp 588inline_size ev_tstamp
287get_clock (void) 589get_clock (void)
288{ 590{
289#if EV_USE_MONOTONIC 591#if EV_USE_MONOTONIC
290 if (expect_true (have_monotonic)) 592 if (expect_true (have_monotonic))
291 { 593 {
… …
304{ 606{
305 return ev_rt_now; 607 return ev_rt_now;
306} 608}
307#endif 609#endif
308 610
309#define array_roundsize(type,n) ((n) | 4 & ~3) 611void
612ev_sleep (ev_tstamp delay)
613{
614 if (delay > 0.)
615 {
616#if EV_USE_NANOSLEEP
617 struct timespec ts;
618
619 ts.tv_sec = (time_t)delay;
620 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
621
622 nanosleep (&ts, 0);
623#elif defined(_WIN32)
624 Sleep ((unsigned long)(delay * 1e3));
625#else
626 struct timeval tv;
627
628 tv.tv_sec = (time_t)delay;
629 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
630
631 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
632 /* somehting not guaranteed by newer posix versions, but guaranteed */
633 /* by older ones */
634 select (0, 0, 0, 0, &tv);
635#endif
636 }
637}
638
639/*****************************************************************************/
640
641#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
642
643/* find a suitable new size for the given array, */
644/* hopefully by rounding to a ncie-to-malloc size */
645inline_size int
646array_nextsize (int elem, int cur, int cnt)
647{
648 int ncur = cur + 1;
649
650 do
651 ncur <<= 1;
652 while (cnt > ncur);
653
654 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
655 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
656 {
657 ncur *= elem;
658 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
659 ncur = ncur - sizeof (void *) * 4;
660 ncur /= elem;
661 }
662
663 return ncur;
664}
665
666static noinline void *
667array_realloc (int elem, void *base, int *cur, int cnt)
668{
669 *cur = array_nextsize (elem, *cur, cnt);
670 return ev_realloc (base, elem * *cur);
671}
672
673#define array_init_zero(base,count) \
674 memset ((void *)(base), 0, sizeof (*(base)) * (count))
310 675
311#define array_needsize(type,base,cur,cnt,init) \ 676#define array_needsize(type,base,cur,cnt,init) \
312 if (expect_false ((cnt) > cur)) \ 677 if (expect_false ((cnt) > (cur))) \
313 { \ 678 { \
314 int newcnt = cur; \ 679 int ocur_ = (cur); \
315 do \ 680 (base) = (type *)array_realloc \
316 { \ 681 (sizeof (type), (base), &(cur), (cnt)); \
317 newcnt = array_roundsize (type, newcnt << 1); \ 682 init ((base) + (ocur_), (cur) - ocur_); \
318 } \
319 while ((cnt) > newcnt); \
320 \
321 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
322 init (base + cur, newcnt - cur); \
323 cur = newcnt; \
324 } 683 }
325 684
685#if 0
326#define array_slim(type,stem) \ 686#define array_slim(type,stem) \
327 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 687 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
328 { \ 688 { \
329 stem ## max = array_roundsize (stem ## cnt >> 1); \ 689 stem ## max = array_roundsize (stem ## cnt >> 1); \
330 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 690 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
331 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 691 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
332 } 692 }
693#endif
333 694
334#define array_free(stem, idx) \ 695#define array_free(stem, idx) \
335 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 696 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
336 697
337/*****************************************************************************/ 698/*****************************************************************************/
338 699
339static void 700/* dummy callback for pending events */
340anfds_init (ANFD *base, int count) 701static void noinline
702pendingcb (EV_P_ ev_prepare *w, int revents)
341{ 703{
342 while (count--)
343 {
344 base->head = 0;
345 base->events = EV_NONE;
346 base->reify = 0;
347
348 ++base;
349 }
350} 704}
351 705
352void 706void noinline
353ev_feed_event (EV_P_ void *w, int revents) 707ev_feed_event (EV_P_ void *w, int revents)
354{ 708{
355 W w_ = (W)w; 709 W w_ = (W)w;
710 int pri = ABSPRI (w_);
356 711
357 if (w_->pending) 712 if (expect_false (w_->pending))
713 pendings [pri][w_->pending - 1].events |= revents;
714 else
358 { 715 {
716 w_->pending = ++pendingcnt [pri];
717 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
718 pendings [pri][w_->pending - 1].w = w_;
359 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 719 pendings [pri][w_->pending - 1].events = revents;
360 return;
361 } 720 }
362
363 w_->pending = ++pendingcnt [ABSPRI (w_)];
364 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
365 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
366 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
367} 721}
368 722
369static void 723inline_speed void
724feed_reverse (EV_P_ W w)
725{
726 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
727 rfeeds [rfeedcnt++] = w;
728}
729
730inline_size void
731feed_reverse_done (EV_P_ int revents)
732{
733 do
734 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
735 while (rfeedcnt);
736}
737
738inline_speed void
370queue_events (EV_P_ W *events, int eventcnt, int type) 739queue_events (EV_P_ W *events, int eventcnt, int type)
371{ 740{
372 int i; 741 int i;
373 742
374 for (i = 0; i < eventcnt; ++i) 743 for (i = 0; i < eventcnt; ++i)
375 ev_feed_event (EV_A_ events [i], type); 744 ev_feed_event (EV_A_ events [i], type);
376} 745}
377 746
747/*****************************************************************************/
748
378inline void 749inline_speed void
379fd_event (EV_P_ int fd, int revents) 750fd_event (EV_P_ int fd, int revents)
380{ 751{
381 ANFD *anfd = anfds + fd; 752 ANFD *anfd = anfds + fd;
382 struct ev_io *w; 753 ev_io *w;
383 754
384 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 755 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
385 { 756 {
386 int ev = w->events & revents; 757 int ev = w->events & revents;
387 758
388 if (ev) 759 if (ev)
389 ev_feed_event (EV_A_ (W)w, ev); 760 ev_feed_event (EV_A_ (W)w, ev);
… …
391} 762}
392 763
393void 764void
394ev_feed_fd_event (EV_P_ int fd, int revents) 765ev_feed_fd_event (EV_P_ int fd, int revents)
395{ 766{
767 if (fd >= 0 && fd < anfdmax)
396 fd_event (EV_A_ fd, revents); 768 fd_event (EV_A_ fd, revents);
397} 769}
398 770
399/*****************************************************************************/ 771/* make sure the external fd watch events are in-sync */
400 772/* with the kernel/libev internal state */
401static void 773inline_size void
402fd_reify (EV_P) 774fd_reify (EV_P)
403{ 775{
404 int i; 776 int i;
405 777
406 for (i = 0; i < fdchangecnt; ++i) 778 for (i = 0; i < fdchangecnt; ++i)
407 { 779 {
408 int fd = fdchanges [i]; 780 int fd = fdchanges [i];
409 ANFD *anfd = anfds + fd; 781 ANFD *anfd = anfds + fd;
410 struct ev_io *w; 782 ev_io *w;
411 783
412 int events = 0; 784 unsigned char events = 0;
413 785
414 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 786 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
415 events |= w->events; 787 events |= (unsigned char)w->events;
416 788
417#if EV_SELECT_IS_WINSOCKET 789#if EV_SELECT_IS_WINSOCKET
418 if (events) 790 if (events)
419 { 791 {
420 unsigned long argp; 792 unsigned long arg;
793 #ifdef EV_FD_TO_WIN32_HANDLE
794 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
795 #else
421 anfd->handle = _get_osfhandle (fd); 796 anfd->handle = _get_osfhandle (fd);
797 #endif
422 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 798 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
423 } 799 }
424#endif 800#endif
425 801
802 {
803 unsigned char o_events = anfd->events;
804 unsigned char o_reify = anfd->reify;
805
426 anfd->reify = 0; 806 anfd->reify = 0;
427
428 method_modify (EV_A_ fd, anfd->events, events);
429 anfd->events = events; 807 anfd->events = events;
808
809 if (o_events != events || o_reify & EV__IOFDSET)
810 backend_modify (EV_A_ fd, o_events, events);
811 }
430 } 812 }
431 813
432 fdchangecnt = 0; 814 fdchangecnt = 0;
433} 815}
434 816
435static void 817/* something about the given fd changed */
818inline_size void
436fd_change (EV_P_ int fd) 819fd_change (EV_P_ int fd, int flags)
437{ 820{
438 if (anfds [fd].reify) 821 unsigned char reify = anfds [fd].reify;
439 return;
440
441 anfds [fd].reify = 1; 822 anfds [fd].reify |= flags;
442 823
824 if (expect_true (!reify))
825 {
443 ++fdchangecnt; 826 ++fdchangecnt;
444 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); 827 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
445 fdchanges [fdchangecnt - 1] = fd; 828 fdchanges [fdchangecnt - 1] = fd;
829 }
446} 830}
447 831
448static void 832/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
833inline_speed void
449fd_kill (EV_P_ int fd) 834fd_kill (EV_P_ int fd)
450{ 835{
451 struct ev_io *w; 836 ev_io *w;
452 837
453 while ((w = (struct ev_io *)anfds [fd].head)) 838 while ((w = (ev_io *)anfds [fd].head))
454 { 839 {
455 ev_io_stop (EV_A_ w); 840 ev_io_stop (EV_A_ w);
456 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 841 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
457 } 842 }
458} 843}
459 844
460static int 845/* check whether the given fd is atcually valid, for error recovery */
846inline_size int
461fd_valid (int fd) 847fd_valid (int fd)
462{ 848{
463#ifdef _WIN32 849#ifdef _WIN32
464 return _get_osfhandle (fd) != -1; 850 return _get_osfhandle (fd) != -1;
465#else 851#else
466 return fcntl (fd, F_GETFD) != -1; 852 return fcntl (fd, F_GETFD) != -1;
467#endif 853#endif
468} 854}
469 855
470/* called on EBADF to verify fds */ 856/* called on EBADF to verify fds */
471static void 857static void noinline
472fd_ebadf (EV_P) 858fd_ebadf (EV_P)
473{ 859{
474 int fd; 860 int fd;
475 861
476 for (fd = 0; fd < anfdmax; ++fd) 862 for (fd = 0; fd < anfdmax; ++fd)
477 if (anfds [fd].events) 863 if (anfds [fd].events)
478 if (!fd_valid (fd) == -1 && errno == EBADF) 864 if (!fd_valid (fd) && errno == EBADF)
479 fd_kill (EV_A_ fd); 865 fd_kill (EV_A_ fd);
480} 866}
481 867
482/* called on ENOMEM in select/poll to kill some fds and retry */ 868/* called on ENOMEM in select/poll to kill some fds and retry */
483static void 869static void noinline
484fd_enomem (EV_P) 870fd_enomem (EV_P)
485{ 871{
486 int fd; 872 int fd;
487 873
488 for (fd = anfdmax; fd--; ) 874 for (fd = anfdmax; fd--; )
… …
491 fd_kill (EV_A_ fd); 877 fd_kill (EV_A_ fd);
492 return; 878 return;
493 } 879 }
494} 880}
495 881
496/* usually called after fork if method needs to re-arm all fds from scratch */ 882/* usually called after fork if backend needs to re-arm all fds from scratch */
497static void 883static void noinline
498fd_rearm_all (EV_P) 884fd_rearm_all (EV_P)
499{ 885{
500 int fd; 886 int fd;
501 887
502 /* this should be highly optimised to not do anything but set a flag */
503 for (fd = 0; fd < anfdmax; ++fd) 888 for (fd = 0; fd < anfdmax; ++fd)
504 if (anfds [fd].events) 889 if (anfds [fd].events)
505 { 890 {
506 anfds [fd].events = 0; 891 anfds [fd].events = 0;
892 anfds [fd].emask = 0;
507 fd_change (EV_A_ fd); 893 fd_change (EV_A_ fd, EV__IOFDSET | 1);
508 } 894 }
509} 895}
510 896
511/*****************************************************************************/ 897/*****************************************************************************/
512 898
513static void 899/*
514upheap (WT *heap, int k) 900 * the heap functions want a real array index. array index 0 uis guaranteed to not
515{ 901 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
516 WT w = heap [k]; 902 * the branching factor of the d-tree.
903 */
517 904
518 while (k && heap [k >> 1]->at > w->at) 905/*
519 { 906 * at the moment we allow libev the luxury of two heaps,
520 heap [k] = heap [k >> 1]; 907 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
521 ((W)heap [k])->active = k + 1; 908 * which is more cache-efficient.
522 k >>= 1; 909 * the difference is about 5% with 50000+ watchers.
523 } 910 */
911#if EV_USE_4HEAP
524 912
525 heap [k] = w; 913#define DHEAP 4
526 ((W)heap [k])->active = k + 1; 914#define HEAP0 (DHEAP - 1) /* index of first element in heap */
915#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
916#define UPHEAP_DONE(p,k) ((p) == (k))
527 917
528} 918/* away from the root */
529 919inline_speed void
530static void
531downheap (WT *heap, int N, int k) 920downheap (ANHE *heap, int N, int k)
532{ 921{
533 WT w = heap [k]; 922 ANHE he = heap [k];
923 ANHE *E = heap + N + HEAP0;
534 924
535 while (k < (N >> 1)) 925 for (;;)
536 { 926 {
537 int j = k << 1; 927 ev_tstamp minat;
928 ANHE *minpos;
929 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
538 930
539 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 931 /* find minimum child */
932 if (expect_true (pos + DHEAP - 1 < E))
540 ++j; 933 {
541 934 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
542 if (w->at <= heap [j]->at) 935 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
936 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
937 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
938 }
939 else if (pos < E)
940 {
941 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
942 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
943 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
944 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
945 }
946 else
543 break; 947 break;
544 948
949 if (ANHE_at (he) <= minat)
950 break;
951
952 heap [k] = *minpos;
953 ev_active (ANHE_w (*minpos)) = k;
954
955 k = minpos - heap;
956 }
957
958 heap [k] = he;
959 ev_active (ANHE_w (he)) = k;
960}
961
962#else /* 4HEAP */
963
964#define HEAP0 1
965#define HPARENT(k) ((k) >> 1)
966#define UPHEAP_DONE(p,k) (!(p))
967
968/* away from the root */
969inline_speed void
970downheap (ANHE *heap, int N, int k)
971{
972 ANHE he = heap [k];
973
974 for (;;)
975 {
976 int c = k << 1;
977
978 if (c > N + HEAP0 - 1)
979 break;
980
981 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
982 ? 1 : 0;
983
984 if (ANHE_at (he) <= ANHE_at (heap [c]))
985 break;
986
545 heap [k] = heap [j]; 987 heap [k] = heap [c];
546 ((W)heap [k])->active = k + 1; 988 ev_active (ANHE_w (heap [k])) = k;
989
547 k = j; 990 k = c;
548 } 991 }
549 992
550 heap [k] = w; 993 heap [k] = he;
551 ((W)heap [k])->active = k + 1; 994 ev_active (ANHE_w (he)) = k;
552} 995}
996#endif
553 997
998/* towards the root */
999inline_speed void
1000upheap (ANHE *heap, int k)
1001{
1002 ANHE he = heap [k];
1003
1004 for (;;)
1005 {
1006 int p = HPARENT (k);
1007
1008 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1009 break;
1010
1011 heap [k] = heap [p];
1012 ev_active (ANHE_w (heap [k])) = k;
1013 k = p;
1014 }
1015
1016 heap [k] = he;
1017 ev_active (ANHE_w (he)) = k;
1018}
1019
1020/* move an element suitably so it is in a correct place */
554inline void 1021inline_size void
555adjustheap (WT *heap, int N, int k) 1022adjustheap (ANHE *heap, int N, int k)
556{ 1023{
1024 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
557 upheap (heap, k); 1025 upheap (heap, k);
1026 else
558 downheap (heap, N, k); 1027 downheap (heap, N, k);
1028}
1029
1030/* rebuild the heap: this function is used only once and executed rarely */
1031inline_size void
1032reheap (ANHE *heap, int N)
1033{
1034 int i;
1035
1036 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1037 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1038 for (i = 0; i < N; ++i)
1039 upheap (heap, i + HEAP0);
559} 1040}
560 1041
561/*****************************************************************************/ 1042/*****************************************************************************/
562 1043
1044/* associate signal watchers to a signal signal */
563typedef struct 1045typedef struct
564{ 1046{
565 WL head; 1047 WL head;
566 sig_atomic_t volatile gotsig; 1048 EV_ATOMIC_T gotsig;
567} ANSIG; 1049} ANSIG;
568 1050
569static ANSIG *signals; 1051static ANSIG *signals;
570static int signalmax; 1052static int signalmax;
571 1053
572static int sigpipe [2]; 1054static EV_ATOMIC_T gotsig;
573static sig_atomic_t volatile gotsig;
574static struct ev_io sigev;
575 1055
576static void 1056/*****************************************************************************/
577signals_init (ANSIG *base, int count)
578{
579 while (count--)
580 {
581 base->head = 0;
582 base->gotsig = 0;
583 1057
584 ++base; 1058/* used to prepare libev internal fd's */
585 } 1059/* this is not fork-safe */
586}
587
588static void
589sighandler (int signum)
590{
591#if _WIN32
592 signal (signum, sighandler);
593#endif
594
595 signals [signum - 1].gotsig = 1;
596
597 if (!gotsig)
598 {
599 int old_errno = errno;
600 gotsig = 1;
601 write (sigpipe [1], &signum, 1);
602 errno = old_errno;
603 }
604}
605
606void
607ev_feed_signal_event (EV_P_ int signum)
608{
609 WL w;
610
611#if EV_MULTIPLICITY
612 assert (("feeding signal events is only supported in the default loop", loop == default_loop));
613#endif
614
615 --signum;
616
617 if (signum < 0 || signum >= signalmax)
618 return;
619
620 signals [signum].gotsig = 0;
621
622 for (w = signals [signum].head; w; w = w->next)
623 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
624}
625
626static void
627sigcb (EV_P_ struct ev_io *iow, int revents)
628{
629 int signum;
630
631 read (sigpipe [0], &revents, 1);
632 gotsig = 0;
633
634 for (signum = signalmax; signum--; )
635 if (signals [signum].gotsig)
636 ev_feed_signal_event (EV_A_ signum + 1);
637}
638
639inline void 1060inline_speed void
640fd_intern (int fd) 1061fd_intern (int fd)
641{ 1062{
642#ifdef _WIN32 1063#ifdef _WIN32
643 int arg = 1; 1064 unsigned long arg = 1;
644 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1065 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
645#else 1066#else
646 fcntl (fd, F_SETFD, FD_CLOEXEC); 1067 fcntl (fd, F_SETFD, FD_CLOEXEC);
647 fcntl (fd, F_SETFL, O_NONBLOCK); 1068 fcntl (fd, F_SETFL, O_NONBLOCK);
648#endif 1069#endif
649} 1070}
650 1071
1072static void noinline
1073evpipe_init (EV_P)
1074{
1075 if (!ev_is_active (&pipe_w))
1076 {
1077#if EV_USE_EVENTFD
1078 if ((evfd = eventfd (0, 0)) >= 0)
1079 {
1080 evpipe [0] = -1;
1081 fd_intern (evfd);
1082 ev_io_set (&pipe_w, evfd, EV_READ);
1083 }
1084 else
1085#endif
1086 {
1087 while (pipe (evpipe))
1088 ev_syserr ("(libev) error creating signal/async pipe");
1089
1090 fd_intern (evpipe [0]);
1091 fd_intern (evpipe [1]);
1092 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1093 }
1094
1095 ev_io_start (EV_A_ &pipe_w);
1096 ev_unref (EV_A); /* watcher should not keep loop alive */
1097 }
1098}
1099
1100inline_size void
1101evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1102{
1103 if (!*flag)
1104 {
1105 int old_errno = errno; /* save errno because write might clobber it */
1106
1107 *flag = 1;
1108
1109#if EV_USE_EVENTFD
1110 if (evfd >= 0)
1111 {
1112 uint64_t counter = 1;
1113 write (evfd, &counter, sizeof (uint64_t));
1114 }
1115 else
1116#endif
1117 write (evpipe [1], &old_errno, 1);
1118
1119 errno = old_errno;
1120 }
1121}
1122
1123/* called whenever the libev signal pipe */
1124/* got some events (signal, async) */
651static void 1125static void
652siginit (EV_P) 1126pipecb (EV_P_ ev_io *iow, int revents)
653{ 1127{
654 fd_intern (sigpipe [0]); 1128#if EV_USE_EVENTFD
655 fd_intern (sigpipe [1]); 1129 if (evfd >= 0)
1130 {
1131 uint64_t counter;
1132 read (evfd, &counter, sizeof (uint64_t));
1133 }
1134 else
1135#endif
1136 {
1137 char dummy;
1138 read (evpipe [0], &dummy, 1);
1139 }
656 1140
657 ev_io_set (&sigev, sigpipe [0], EV_READ); 1141 if (gotsig && ev_is_default_loop (EV_A))
658 ev_io_start (EV_A_ &sigev); 1142 {
659 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1143 int signum;
1144 gotsig = 0;
1145
1146 for (signum = signalmax; signum--; )
1147 if (signals [signum].gotsig)
1148 ev_feed_signal_event (EV_A_ signum + 1);
1149 }
1150
1151#if EV_ASYNC_ENABLE
1152 if (gotasync)
1153 {
1154 int i;
1155 gotasync = 0;
1156
1157 for (i = asynccnt; i--; )
1158 if (asyncs [i]->sent)
1159 {
1160 asyncs [i]->sent = 0;
1161 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1162 }
1163 }
1164#endif
660} 1165}
661 1166
662/*****************************************************************************/ 1167/*****************************************************************************/
663 1168
664static struct ev_child *childs [PID_HASHSIZE]; 1169static void
1170ev_sighandler (int signum)
1171{
1172#if EV_MULTIPLICITY
1173 struct ev_loop *loop = &default_loop_struct;
1174#endif
1175
1176#if _WIN32
1177 signal (signum, ev_sighandler);
1178#endif
1179
1180 signals [signum - 1].gotsig = 1;
1181 evpipe_write (EV_A_ &gotsig);
1182}
1183
1184void noinline
1185ev_feed_signal_event (EV_P_ int signum)
1186{
1187 WL w;
1188
1189#if EV_MULTIPLICITY
1190 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1191#endif
1192
1193 --signum;
1194
1195 if (signum < 0 || signum >= signalmax)
1196 return;
1197
1198 signals [signum].gotsig = 0;
1199
1200 for (w = signals [signum].head; w; w = w->next)
1201 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1202}
1203
1204/*****************************************************************************/
1205
1206static WL childs [EV_PID_HASHSIZE];
665 1207
666#ifndef _WIN32 1208#ifndef _WIN32
667 1209
668static struct ev_signal childev; 1210static ev_signal childev;
1211
1212#ifndef WIFCONTINUED
1213# define WIFCONTINUED(status) 0
1214#endif
1215
1216/* handle a single child status event */
1217inline_speed void
1218child_reap (EV_P_ int chain, int pid, int status)
1219{
1220 ev_child *w;
1221 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1222
1223 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1224 {
1225 if ((w->pid == pid || !w->pid)
1226 && (!traced || (w->flags & 1)))
1227 {
1228 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1229 w->rpid = pid;
1230 w->rstatus = status;
1231 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1232 }
1233 }
1234}
669 1235
670#ifndef WCONTINUED 1236#ifndef WCONTINUED
671# define WCONTINUED 0 1237# define WCONTINUED 0
672#endif 1238#endif
673 1239
1240/* called on sigchld etc., calls waitpid */
674static void 1241static void
675child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
676{
677 struct ev_child *w;
678
679 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
680 if (w->pid == pid || !w->pid)
681 {
682 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
683 w->rpid = pid;
684 w->rstatus = status;
685 ev_feed_event (EV_A_ (W)w, EV_CHILD);
686 }
687}
688
689static void
690childcb (EV_P_ struct ev_signal *sw, int revents) 1242childcb (EV_P_ ev_signal *sw, int revents)
691{ 1243{
692 int pid, status; 1244 int pid, status;
693 1245
1246 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
694 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1247 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
695 { 1248 if (!WCONTINUED
1249 || errno != EINVAL
1250 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1251 return;
1252
696 /* make sure we are called again until all childs have been reaped */ 1253 /* make sure we are called again until all children have been reaped */
1254 /* we need to do it this way so that the callback gets called before we continue */
697 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1255 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
698 1256
699 child_reap (EV_A_ sw, pid, pid, status); 1257 child_reap (EV_A_ pid, pid, status);
1258 if (EV_PID_HASHSIZE > 1)
700 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1259 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
701 }
702} 1260}
703 1261
704#endif 1262#endif
705 1263
706/*****************************************************************************/ 1264/*****************************************************************************/
707 1265
1266#if EV_USE_PORT
1267# include "ev_port.c"
1268#endif
708#if EV_USE_KQUEUE 1269#if EV_USE_KQUEUE
709# include "ev_kqueue.c" 1270# include "ev_kqueue.c"
710#endif 1271#endif
711#if EV_USE_EPOLL 1272#if EV_USE_EPOLL
712# include "ev_epoll.c" 1273# include "ev_epoll.c"
… …
729{ 1290{
730 return EV_VERSION_MINOR; 1291 return EV_VERSION_MINOR;
731} 1292}
732 1293
733/* return true if we are running with elevated privileges and should ignore env variables */ 1294/* return true if we are running with elevated privileges and should ignore env variables */
734static int 1295int inline_size
735enable_secure (void) 1296enable_secure (void)
736{ 1297{
737#ifdef _WIN32 1298#ifdef _WIN32
738 return 0; 1299 return 0;
739#else 1300#else
740 return getuid () != geteuid () 1301 return getuid () != geteuid ()
741 || getgid () != getegid (); 1302 || getgid () != getegid ();
742#endif 1303#endif
743} 1304}
744 1305
745int 1306unsigned int
746ev_method (EV_P) 1307ev_supported_backends (void)
747{ 1308{
748 return method; 1309 unsigned int flags = 0;
749}
750 1310
751static void 1311 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
752loop_init (EV_P_ int methods) 1312 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1313 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1314 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1315 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1316
1317 return flags;
1318}
1319
1320unsigned int
1321ev_recommended_backends (void)
753{ 1322{
754 if (!method) 1323 unsigned int flags = ev_supported_backends ();
1324
1325#ifndef __NetBSD__
1326 /* kqueue is borked on everything but netbsd apparently */
1327 /* it usually doesn't work correctly on anything but sockets and pipes */
1328 flags &= ~EVBACKEND_KQUEUE;
1329#endif
1330#ifdef __APPLE__
1331 /* only select works correctly on that "unix-certified" platform */
1332 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1333 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1334#endif
1335
1336 return flags;
1337}
1338
1339unsigned int
1340ev_embeddable_backends (void)
1341{
1342 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1343
1344 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1345 /* please fix it and tell me how to detect the fix */
1346 flags &= ~EVBACKEND_EPOLL;
1347
1348 return flags;
1349}
1350
1351unsigned int
1352ev_backend (EV_P)
1353{
1354 return backend;
1355}
1356
1357unsigned int
1358ev_loop_count (EV_P)
1359{
1360 return loop_count;
1361}
1362
1363unsigned int
1364ev_loop_depth (EV_P)
1365{
1366 return loop_depth;
1367}
1368
1369void
1370ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1371{
1372 io_blocktime = interval;
1373}
1374
1375void
1376ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1377{
1378 timeout_blocktime = interval;
1379}
1380
1381/* initialise a loop structure, must be zero-initialised */
1382static void noinline
1383loop_init (EV_P_ unsigned int flags)
1384{
1385 if (!backend)
755 { 1386 {
1387#if EV_USE_REALTIME
1388 if (!have_realtime)
1389 {
1390 struct timespec ts;
1391
1392 if (!clock_gettime (CLOCK_REALTIME, &ts))
1393 have_realtime = 1;
1394 }
1395#endif
1396
756#if EV_USE_MONOTONIC 1397#if EV_USE_MONOTONIC
1398 if (!have_monotonic)
757 { 1399 {
758 struct timespec ts; 1400 struct timespec ts;
1401
759 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1402 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
760 have_monotonic = 1; 1403 have_monotonic = 1;
761 } 1404 }
762#endif 1405#endif
763 1406
764 ev_rt_now = ev_time (); 1407 ev_rt_now = ev_time ();
765 mn_now = get_clock (); 1408 mn_now = get_clock ();
766 now_floor = mn_now; 1409 now_floor = mn_now;
767 rtmn_diff = ev_rt_now - mn_now; 1410 rtmn_diff = ev_rt_now - mn_now;
768 1411
769 if (methods == EVMETHOD_AUTO) 1412 io_blocktime = 0.;
770 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1413 timeout_blocktime = 0.;
1414 backend = 0;
1415 backend_fd = -1;
1416 gotasync = 0;
1417#if EV_USE_INOTIFY
1418 fs_fd = -2;
1419#endif
1420
1421 /* pid check not overridable via env */
1422#ifndef _WIN32
1423 if (flags & EVFLAG_FORKCHECK)
1424 curpid = getpid ();
1425#endif
1426
1427 if (!(flags & EVFLAG_NOENV)
1428 && !enable_secure ()
1429 && getenv ("LIBEV_FLAGS"))
771 methods = atoi (getenv ("LIBEV_METHODS")); 1430 flags = atoi (getenv ("LIBEV_FLAGS"));
772 else
773 methods = EVMETHOD_ANY;
774 1431
775 method = 0; 1432 if (!(flags & 0x0000ffffU))
1433 flags |= ev_recommended_backends ();
1434
1435#if EV_USE_PORT
1436 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1437#endif
776#if EV_USE_KQUEUE 1438#if EV_USE_KQUEUE
777 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); 1439 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
778#endif 1440#endif
779#if EV_USE_EPOLL 1441#if EV_USE_EPOLL
780 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); 1442 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
781#endif 1443#endif
782#if EV_USE_POLL 1444#if EV_USE_POLL
783 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 1445 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
784#endif 1446#endif
785#if EV_USE_SELECT 1447#if EV_USE_SELECT
786 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 1448 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
787#endif 1449#endif
788 1450
1451 ev_prepare_init (&pending_w, pendingcb);
1452
789 ev_init (&sigev, sigcb); 1453 ev_init (&pipe_w, pipecb);
790 ev_set_priority (&sigev, EV_MAXPRI); 1454 ev_set_priority (&pipe_w, EV_MAXPRI);
791 } 1455 }
792} 1456}
793 1457
794void 1458/* free up a loop structure */
1459static void noinline
795loop_destroy (EV_P) 1460loop_destroy (EV_P)
796{ 1461{
797 int i; 1462 int i;
798 1463
1464 if (ev_is_active (&pipe_w))
1465 {
1466 ev_ref (EV_A); /* signal watcher */
1467 ev_io_stop (EV_A_ &pipe_w);
1468
1469#if EV_USE_EVENTFD
1470 if (evfd >= 0)
1471 close (evfd);
1472#endif
1473
1474 if (evpipe [0] >= 0)
1475 {
1476 close (evpipe [0]);
1477 close (evpipe [1]);
1478 }
1479 }
1480
1481#if EV_USE_INOTIFY
1482 if (fs_fd >= 0)
1483 close (fs_fd);
1484#endif
1485
1486 if (backend_fd >= 0)
1487 close (backend_fd);
1488
1489#if EV_USE_PORT
1490 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1491#endif
799#if EV_USE_KQUEUE 1492#if EV_USE_KQUEUE
800 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1493 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
801#endif 1494#endif
802#if EV_USE_EPOLL 1495#if EV_USE_EPOLL
803 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1496 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
804#endif 1497#endif
805#if EV_USE_POLL 1498#if EV_USE_POLL
806 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1499 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
807#endif 1500#endif
808#if EV_USE_SELECT 1501#if EV_USE_SELECT
809 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1502 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
810#endif 1503#endif
811 1504
812 for (i = NUMPRI; i--; ) 1505 for (i = NUMPRI; i--; )
1506 {
813 array_free (pending, [i]); 1507 array_free (pending, [i]);
1508#if EV_IDLE_ENABLE
1509 array_free (idle, [i]);
1510#endif
1511 }
1512
1513 ev_free (anfds); anfdmax = 0;
814 1514
815 /* have to use the microsoft-never-gets-it-right macro */ 1515 /* have to use the microsoft-never-gets-it-right macro */
1516 array_free (rfeed, EMPTY);
816 array_free (fdchange, EMPTY); 1517 array_free (fdchange, EMPTY);
817 array_free (timer, EMPTY); 1518 array_free (timer, EMPTY);
818#if EV_PERIODICS 1519#if EV_PERIODIC_ENABLE
819 array_free (periodic, EMPTY); 1520 array_free (periodic, EMPTY);
820#endif 1521#endif
1522#if EV_FORK_ENABLE
821 array_free (idle, EMPTY); 1523 array_free (fork, EMPTY);
1524#endif
822 array_free (prepare, EMPTY); 1525 array_free (prepare, EMPTY);
823 array_free (check, EMPTY); 1526 array_free (check, EMPTY);
1527#if EV_ASYNC_ENABLE
1528 array_free (async, EMPTY);
1529#endif
824 1530
825 method = 0; 1531 backend = 0;
826} 1532}
827 1533
828static void 1534#if EV_USE_INOTIFY
1535inline_size void infy_fork (EV_P);
1536#endif
1537
1538inline_size void
829loop_fork (EV_P) 1539loop_fork (EV_P)
830{ 1540{
1541#if EV_USE_PORT
1542 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1543#endif
1544#if EV_USE_KQUEUE
1545 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1546#endif
831#if EV_USE_EPOLL 1547#if EV_USE_EPOLL
832 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1548 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
833#endif 1549#endif
834#if EV_USE_KQUEUE 1550#if EV_USE_INOTIFY
835 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 1551 infy_fork (EV_A);
836#endif 1552#endif
837 1553
838 if (ev_is_active (&sigev)) 1554 if (ev_is_active (&pipe_w))
839 { 1555 {
840 /* default loop */ 1556 /* this "locks" the handlers against writing to the pipe */
1557 /* while we modify the fd vars */
1558 gotsig = 1;
1559#if EV_ASYNC_ENABLE
1560 gotasync = 1;
1561#endif
841 1562
842 ev_ref (EV_A); 1563 ev_ref (EV_A);
843 ev_io_stop (EV_A_ &sigev); 1564 ev_io_stop (EV_A_ &pipe_w);
1565
1566#if EV_USE_EVENTFD
1567 if (evfd >= 0)
1568 close (evfd);
1569#endif
1570
1571 if (evpipe [0] >= 0)
1572 {
844 close (sigpipe [0]); 1573 close (evpipe [0]);
845 close (sigpipe [1]); 1574 close (evpipe [1]);
1575 }
846 1576
847 while (pipe (sigpipe))
848 syserr ("(libev) error creating pipe");
849
850 siginit (EV_A); 1577 evpipe_init (EV_A);
1578 /* now iterate over everything, in case we missed something */
1579 pipecb (EV_A_ &pipe_w, EV_READ);
851 } 1580 }
852 1581
853 postfork = 0; 1582 postfork = 0;
854} 1583}
1584
1585#if EV_MULTIPLICITY
1586
1587struct ev_loop *
1588ev_loop_new (unsigned int flags)
1589{
1590 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1591
1592 memset (loop, 0, sizeof (struct ev_loop));
1593
1594 loop_init (EV_A_ flags);
1595
1596 if (ev_backend (EV_A))
1597 return loop;
1598
1599 return 0;
1600}
1601
1602void
1603ev_loop_destroy (EV_P)
1604{
1605 loop_destroy (EV_A);
1606 ev_free (loop);
1607}
1608
1609void
1610ev_loop_fork (EV_P)
1611{
1612 postfork = 1; /* must be in line with ev_default_fork */
1613}
1614
1615#if EV_VERIFY
1616static void noinline
1617verify_watcher (EV_P_ W w)
1618{
1619 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1620
1621 if (w->pending)
1622 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1623}
1624
1625static void noinline
1626verify_heap (EV_P_ ANHE *heap, int N)
1627{
1628 int i;
1629
1630 for (i = HEAP0; i < N + HEAP0; ++i)
1631 {
1632 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1633 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1634 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1635
1636 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1637 }
1638}
1639
1640static void noinline
1641array_verify (EV_P_ W *ws, int cnt)
1642{
1643 while (cnt--)
1644 {
1645 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1646 verify_watcher (EV_A_ ws [cnt]);
1647 }
1648}
1649#endif
1650
1651void
1652ev_loop_verify (EV_P)
1653{
1654#if EV_VERIFY
1655 int i;
1656 WL w;
1657
1658 assert (activecnt >= -1);
1659
1660 assert (fdchangemax >= fdchangecnt);
1661 for (i = 0; i < fdchangecnt; ++i)
1662 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1663
1664 assert (anfdmax >= 0);
1665 for (i = 0; i < anfdmax; ++i)
1666 for (w = anfds [i].head; w; w = w->next)
1667 {
1668 verify_watcher (EV_A_ (W)w);
1669 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1670 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1671 }
1672
1673 assert (timermax >= timercnt);
1674 verify_heap (EV_A_ timers, timercnt);
1675
1676#if EV_PERIODIC_ENABLE
1677 assert (periodicmax >= periodiccnt);
1678 verify_heap (EV_A_ periodics, periodiccnt);
1679#endif
1680
1681 for (i = NUMPRI; i--; )
1682 {
1683 assert (pendingmax [i] >= pendingcnt [i]);
1684#if EV_IDLE_ENABLE
1685 assert (idleall >= 0);
1686 assert (idlemax [i] >= idlecnt [i]);
1687 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1688#endif
1689 }
1690
1691#if EV_FORK_ENABLE
1692 assert (forkmax >= forkcnt);
1693 array_verify (EV_A_ (W *)forks, forkcnt);
1694#endif
1695
1696#if EV_ASYNC_ENABLE
1697 assert (asyncmax >= asynccnt);
1698 array_verify (EV_A_ (W *)asyncs, asynccnt);
1699#endif
1700
1701 assert (preparemax >= preparecnt);
1702 array_verify (EV_A_ (W *)prepares, preparecnt);
1703
1704 assert (checkmax >= checkcnt);
1705 array_verify (EV_A_ (W *)checks, checkcnt);
1706
1707# if 0
1708 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1709 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1710# endif
1711#endif
1712}
1713
1714#endif /* multiplicity */
855 1715
856#if EV_MULTIPLICITY 1716#if EV_MULTIPLICITY
857struct ev_loop * 1717struct ev_loop *
858ev_loop_new (int methods) 1718ev_default_loop_init (unsigned int flags)
859{
860 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
861
862 memset (loop, 0, sizeof (struct ev_loop));
863
864 loop_init (EV_A_ methods);
865
866 if (ev_method (EV_A))
867 return loop;
868
869 return 0;
870}
871
872void
873ev_loop_destroy (EV_P)
874{
875 loop_destroy (EV_A);
876 ev_free (loop);
877}
878
879void
880ev_loop_fork (EV_P)
881{
882 postfork = 1;
883}
884
885#endif
886
887#if EV_MULTIPLICITY
888struct ev_loop *
889#else 1719#else
890int 1720int
1721ev_default_loop (unsigned int flags)
891#endif 1722#endif
892ev_default_loop (int methods)
893{ 1723{
894 if (sigpipe [0] == sigpipe [1])
895 if (pipe (sigpipe))
896 return 0;
897
898 if (!default_loop) 1724 if (!ev_default_loop_ptr)
899 { 1725 {
900#if EV_MULTIPLICITY 1726#if EV_MULTIPLICITY
901 struct ev_loop *loop = default_loop = &default_loop_struct; 1727 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
902#else 1728#else
903 default_loop = 1; 1729 ev_default_loop_ptr = 1;
904#endif 1730#endif
905 1731
906 loop_init (EV_A_ methods); 1732 loop_init (EV_A_ flags);
907 1733
908 if (ev_method (EV_A)) 1734 if (ev_backend (EV_A))
909 { 1735 {
910 siginit (EV_A);
911
912#ifndef _WIN32 1736#ifndef _WIN32
913 ev_signal_init (&childev, childcb, SIGCHLD); 1737 ev_signal_init (&childev, childcb, SIGCHLD);
914 ev_set_priority (&childev, EV_MAXPRI); 1738 ev_set_priority (&childev, EV_MAXPRI);
915 ev_signal_start (EV_A_ &childev); 1739 ev_signal_start (EV_A_ &childev);
916 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1740 ev_unref (EV_A); /* child watcher should not keep loop alive */
917#endif 1741#endif
918 } 1742 }
919 else 1743 else
920 default_loop = 0; 1744 ev_default_loop_ptr = 0;
921 } 1745 }
922 1746
923 return default_loop; 1747 return ev_default_loop_ptr;
924} 1748}
925 1749
926void 1750void
927ev_default_destroy (void) 1751ev_default_destroy (void)
928{ 1752{
929#if EV_MULTIPLICITY 1753#if EV_MULTIPLICITY
930 struct ev_loop *loop = default_loop; 1754 struct ev_loop *loop = ev_default_loop_ptr;
931#endif 1755#endif
1756
1757 ev_default_loop_ptr = 0;
932 1758
933#ifndef _WIN32 1759#ifndef _WIN32
934 ev_ref (EV_A); /* child watcher */ 1760 ev_ref (EV_A); /* child watcher */
935 ev_signal_stop (EV_A_ &childev); 1761 ev_signal_stop (EV_A_ &childev);
936#endif 1762#endif
937 1763
938 ev_ref (EV_A); /* signal watcher */
939 ev_io_stop (EV_A_ &sigev);
940
941 close (sigpipe [0]); sigpipe [0] = 0;
942 close (sigpipe [1]); sigpipe [1] = 0;
943
944 loop_destroy (EV_A); 1764 loop_destroy (EV_A);
945} 1765}
946 1766
947void 1767void
948ev_default_fork (void) 1768ev_default_fork (void)
949{ 1769{
950#if EV_MULTIPLICITY 1770#if EV_MULTIPLICITY
951 struct ev_loop *loop = default_loop; 1771 struct ev_loop *loop = ev_default_loop_ptr;
952#endif 1772#endif
953 1773
954 if (method) 1774 postfork = 1; /* must be in line with ev_loop_fork */
955 postfork = 1;
956} 1775}
957 1776
958/*****************************************************************************/ 1777/*****************************************************************************/
959 1778
960static int 1779void
961any_pending (EV_P) 1780ev_invoke (EV_P_ void *w, int revents)
962{ 1781{
963 int pri; 1782 EV_CB_INVOKE ((W)w, revents);
964
965 for (pri = NUMPRI; pri--; )
966 if (pendingcnt [pri])
967 return 1;
968
969 return 0;
970} 1783}
971 1784
972static void 1785inline_speed void
973call_pending (EV_P) 1786call_pending (EV_P)
974{ 1787{
975 int pri; 1788 int pri;
976 1789
977 for (pri = NUMPRI; pri--; ) 1790 for (pri = NUMPRI; pri--; )
978 while (pendingcnt [pri]) 1791 while (pendingcnt [pri])
979 { 1792 {
980 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1793 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
981 1794
982 if (p->w) 1795 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
983 { 1796 /* ^ this is no longer true, as pending_w could be here */
1797
984 p->w->pending = 0; 1798 p->w->pending = 0;
985 EV_CB_INVOKE (p->w, p->events); 1799 EV_CB_INVOKE (p->w, p->events);
986 } 1800 EV_FREQUENT_CHECK;
987 } 1801 }
988} 1802}
989 1803
990static void 1804#if EV_IDLE_ENABLE
1805/* make idle watchers pending. this handles the "call-idle */
1806/* only when higher priorities are idle" logic */
1807inline_size void
1808idle_reify (EV_P)
1809{
1810 if (expect_false (idleall))
1811 {
1812 int pri;
1813
1814 for (pri = NUMPRI; pri--; )
1815 {
1816 if (pendingcnt [pri])
1817 break;
1818
1819 if (idlecnt [pri])
1820 {
1821 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1822 break;
1823 }
1824 }
1825 }
1826}
1827#endif
1828
1829/* make timers pending */
1830inline_size void
991timers_reify (EV_P) 1831timers_reify (EV_P)
992{ 1832{
1833 EV_FREQUENT_CHECK;
1834
993 while (timercnt && ((WT)timers [0])->at <= mn_now) 1835 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
994 { 1836 {
995 struct ev_timer *w = timers [0]; 1837 do
996
997 assert (("inactive timer on timer heap detected", ev_is_active (w)));
998
999 /* first reschedule or stop timer */
1000 if (w->repeat)
1001 { 1838 {
1839 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1840
1841 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
1842
1843 /* first reschedule or stop timer */
1844 if (w->repeat)
1845 {
1846 ev_at (w) += w->repeat;
1847 if (ev_at (w) < mn_now)
1848 ev_at (w) = mn_now;
1849
1002 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1850 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1003 1851
1004 ((WT)w)->at += w->repeat; 1852 ANHE_at_cache (timers [HEAP0]);
1005 if (((WT)w)->at < mn_now)
1006 ((WT)w)->at = mn_now;
1007
1008 downheap ((WT *)timers, timercnt, 0); 1853 downheap (timers, timercnt, HEAP0);
1854 }
1855 else
1856 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1857
1858 EV_FREQUENT_CHECK;
1859 feed_reverse (EV_A_ (W)w);
1009 } 1860 }
1010 else 1861 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1011 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1012 1862
1013 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 1863 feed_reverse_done (EV_A_ EV_TIMEOUT);
1014 } 1864 }
1015} 1865}
1016 1866
1017#if EV_PERIODICS 1867#if EV_PERIODIC_ENABLE
1018static void 1868/* make periodics pending */
1869inline_size void
1019periodics_reify (EV_P) 1870periodics_reify (EV_P)
1020{ 1871{
1872 EV_FREQUENT_CHECK;
1873
1021 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 1874 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1022 { 1875 {
1023 struct ev_periodic *w = periodics [0]; 1876 int feed_count = 0;
1024 1877
1878 do
1879 {
1880 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1881
1025 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1882 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1026 1883
1027 /* first reschedule or stop timer */ 1884 /* first reschedule or stop timer */
1885 if (w->reschedule_cb)
1886 {
1887 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1888
1889 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1890
1891 ANHE_at_cache (periodics [HEAP0]);
1892 downheap (periodics, periodiccnt, HEAP0);
1893 }
1894 else if (w->interval)
1895 {
1896 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1897 /* if next trigger time is not sufficiently in the future, put it there */
1898 /* this might happen because of floating point inexactness */
1899 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1900 {
1901 ev_at (w) += w->interval;
1902
1903 /* if interval is unreasonably low we might still have a time in the past */
1904 /* so correct this. this will make the periodic very inexact, but the user */
1905 /* has effectively asked to get triggered more often than possible */
1906 if (ev_at (w) < ev_rt_now)
1907 ev_at (w) = ev_rt_now;
1908 }
1909
1910 ANHE_at_cache (periodics [HEAP0]);
1911 downheap (periodics, periodiccnt, HEAP0);
1912 }
1913 else
1914 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1915
1916 EV_FREQUENT_CHECK;
1917 feed_reverse (EV_A_ (W)w);
1918 }
1919 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1920
1921 feed_reverse_done (EV_A_ EV_PERIODIC);
1922 }
1923}
1924
1925/* simply recalculate all periodics */
1926/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1927static void noinline
1928periodics_reschedule (EV_P)
1929{
1930 int i;
1931
1932 /* adjust periodics after time jump */
1933 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1934 {
1935 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1936
1028 if (w->reschedule_cb) 1937 if (w->reschedule_cb)
1938 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1939 else if (w->interval)
1940 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1941
1942 ANHE_at_cache (periodics [i]);
1943 }
1944
1945 reheap (periodics, periodiccnt);
1946}
1947#endif
1948
1949/* adjust all timers by a given offset */
1950static void noinline
1951timers_reschedule (EV_P_ ev_tstamp adjust)
1952{
1953 int i;
1954
1955 for (i = 0; i < timercnt; ++i)
1956 {
1957 ANHE *he = timers + i + HEAP0;
1958 ANHE_w (*he)->at += adjust;
1959 ANHE_at_cache (*he);
1960 }
1961}
1962
1963/* fetch new monotonic and realtime times from the kernel */
1964/* also detetc if there was a timejump, and act accordingly */
1965inline_speed void
1966time_update (EV_P_ ev_tstamp max_block)
1967{
1968#if EV_USE_MONOTONIC
1969 if (expect_true (have_monotonic))
1970 {
1971 int i;
1972 ev_tstamp odiff = rtmn_diff;
1973
1974 mn_now = get_clock ();
1975
1976 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1977 /* interpolate in the meantime */
1978 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1029 { 1979 {
1030 ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 1980 ev_rt_now = rtmn_diff + mn_now;
1031 1981 return;
1032 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1033 downheap ((WT *)periodics, periodiccnt, 0);
1034 } 1982 }
1035 else if (w->interval)
1036 {
1037 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1038 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1039 downheap ((WT *)periodics, periodiccnt, 0);
1040 }
1041 else
1042 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1043 1983
1044 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1045 }
1046}
1047
1048static void
1049periodics_reschedule (EV_P)
1050{
1051 int i;
1052
1053 /* adjust periodics after time jump */
1054 for (i = 0; i < periodiccnt; ++i)
1055 {
1056 struct ev_periodic *w = periodics [i];
1057
1058 if (w->reschedule_cb)
1059 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1060 else if (w->interval)
1061 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1062 }
1063
1064 /* now rebuild the heap */
1065 for (i = periodiccnt >> 1; i--; )
1066 downheap ((WT *)periodics, periodiccnt, i);
1067}
1068#endif
1069
1070inline int
1071time_update_monotonic (EV_P)
1072{
1073 mn_now = get_clock ();
1074
1075 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1076 {
1077 ev_rt_now = rtmn_diff + mn_now;
1078 return 0;
1079 }
1080 else
1081 {
1082 now_floor = mn_now; 1984 now_floor = mn_now;
1083 ev_rt_now = ev_time (); 1985 ev_rt_now = ev_time ();
1084 return 1;
1085 }
1086}
1087 1986
1088static void 1987 /* loop a few times, before making important decisions.
1089time_update (EV_P) 1988 * on the choice of "4": one iteration isn't enough,
1090{ 1989 * in case we get preempted during the calls to
1091 int i; 1990 * ev_time and get_clock. a second call is almost guaranteed
1092 1991 * to succeed in that case, though. and looping a few more times
1093#if EV_USE_MONOTONIC 1992 * doesn't hurt either as we only do this on time-jumps or
1094 if (expect_true (have_monotonic)) 1993 * in the unlikely event of having been preempted here.
1095 { 1994 */
1096 if (time_update_monotonic (EV_A)) 1995 for (i = 4; --i; )
1097 { 1996 {
1098 ev_tstamp odiff = rtmn_diff;
1099
1100 for (i = 4; --i; ) /* loop a few times, before making important decisions */
1101 {
1102 rtmn_diff = ev_rt_now - mn_now; 1997 rtmn_diff = ev_rt_now - mn_now;
1103 1998
1104 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1999 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1105 return; /* all is well */ 2000 return; /* all is well */
1106 2001
1107 ev_rt_now = ev_time (); 2002 ev_rt_now = ev_time ();
1108 mn_now = get_clock (); 2003 mn_now = get_clock ();
1109 now_floor = mn_now; 2004 now_floor = mn_now;
1110 } 2005 }
1111 2006
2007 /* no timer adjustment, as the monotonic clock doesn't jump */
2008 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1112# if EV_PERIODICS 2009# if EV_PERIODIC_ENABLE
2010 periodics_reschedule (EV_A);
2011# endif
2012 }
2013 else
2014#endif
2015 {
2016 ev_rt_now = ev_time ();
2017
2018 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2019 {
2020 /* adjust timers. this is easy, as the offset is the same for all of them */
2021 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2022#if EV_PERIODIC_ENABLE
1113 periodics_reschedule (EV_A); 2023 periodics_reschedule (EV_A);
1114# endif 2024#endif
1115 /* no timer adjustment, as the monotonic clock doesn't jump */
1116 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1117 } 2025 }
1118 }
1119 else
1120#endif
1121 {
1122 ev_rt_now = ev_time ();
1123
1124 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1125 {
1126#if EV_PERIODICS
1127 periodics_reschedule (EV_A);
1128#endif
1129
1130 /* adjust timers. this is easy, as the offset is the same for all */
1131 for (i = 0; i < timercnt; ++i)
1132 ((WT)timers [i])->at += ev_rt_now - mn_now;
1133 }
1134 2026
1135 mn_now = ev_rt_now; 2027 mn_now = ev_rt_now;
1136 } 2028 }
1137} 2029}
1138 2030
1139void 2031void
1140ev_ref (EV_P)
1141{
1142 ++activecnt;
1143}
1144
1145void
1146ev_unref (EV_P)
1147{
1148 --activecnt;
1149}
1150
1151static int loop_done;
1152
1153void
1154ev_loop (EV_P_ int flags) 2032ev_loop (EV_P_ int flags)
1155{ 2033{
1156 double block; 2034 ++loop_depth;
1157 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 2035
2036 loop_done = EVUNLOOP_CANCEL;
2037
2038 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1158 2039
1159 do 2040 do
1160 { 2041 {
2042#if EV_VERIFY >= 2
2043 ev_loop_verify (EV_A);
2044#endif
2045
2046#ifndef _WIN32
2047 if (expect_false (curpid)) /* penalise the forking check even more */
2048 if (expect_false (getpid () != curpid))
2049 {
2050 curpid = getpid ();
2051 postfork = 1;
2052 }
2053#endif
2054
2055#if EV_FORK_ENABLE
2056 /* we might have forked, so queue fork handlers */
2057 if (expect_false (postfork))
2058 if (forkcnt)
2059 {
2060 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2061 call_pending (EV_A);
2062 }
2063#endif
2064
1161 /* queue check watchers (and execute them) */ 2065 /* queue prepare watchers (and execute them) */
1162 if (expect_false (preparecnt)) 2066 if (expect_false (preparecnt))
1163 { 2067 {
1164 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2068 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1165 call_pending (EV_A); 2069 call_pending (EV_A);
1166 } 2070 }
… …
1171 2075
1172 /* update fd-related kernel structures */ 2076 /* update fd-related kernel structures */
1173 fd_reify (EV_A); 2077 fd_reify (EV_A);
1174 2078
1175 /* calculate blocking time */ 2079 /* calculate blocking time */
2080 {
2081 ev_tstamp waittime = 0.;
2082 ev_tstamp sleeptime = 0.;
1176 2083
1177 /* we only need this for !monotonic clock or timers, but as we basically 2084 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1178 always have timers, we just calculate it always */
1179#if EV_USE_MONOTONIC
1180 if (expect_true (have_monotonic))
1181 time_update_monotonic (EV_A);
1182 else
1183#endif
1184 { 2085 {
1185 ev_rt_now = ev_time (); 2086 /* remember old timestamp for io_blocktime calculation */
1186 mn_now = ev_rt_now; 2087 ev_tstamp prev_mn_now = mn_now;
1187 }
1188 2088
1189 if (flags & EVLOOP_NONBLOCK || idlecnt) 2089 /* update time to cancel out callback processing overhead */
1190 block = 0.; 2090 time_update (EV_A_ 1e100);
1191 else 2091
1192 {
1193 block = MAX_BLOCKTIME; 2092 waittime = MAX_BLOCKTIME;
1194 2093
1195 if (timercnt) 2094 if (timercnt)
1196 { 2095 {
1197 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 2096 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1198 if (block > to) block = to; 2097 if (waittime > to) waittime = to;
1199 } 2098 }
1200 2099
1201#if EV_PERIODICS 2100#if EV_PERIODIC_ENABLE
1202 if (periodiccnt) 2101 if (periodiccnt)
1203 { 2102 {
1204 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; 2103 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1205 if (block > to) block = to; 2104 if (waittime > to) waittime = to;
1206 } 2105 }
1207#endif 2106#endif
1208 2107
1209 if (block < 0.) block = 0.; 2108 /* don't let timeouts decrease the waittime below timeout_blocktime */
2109 if (expect_false (waittime < timeout_blocktime))
2110 waittime = timeout_blocktime;
2111
2112 /* extra check because io_blocktime is commonly 0 */
2113 if (expect_false (io_blocktime))
2114 {
2115 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2116
2117 if (sleeptime > waittime - backend_fudge)
2118 sleeptime = waittime - backend_fudge;
2119
2120 if (expect_true (sleeptime > 0.))
2121 {
2122 ev_sleep (sleeptime);
2123 waittime -= sleeptime;
2124 }
2125 }
1210 } 2126 }
1211 2127
1212 method_poll (EV_A_ block); 2128 ++loop_count;
2129 backend_poll (EV_A_ waittime);
1213 2130
1214 /* update ev_rt_now, do magic */ 2131 /* update ev_rt_now, do magic */
1215 time_update (EV_A); 2132 time_update (EV_A_ waittime + sleeptime);
2133 }
1216 2134
1217 /* queue pending timers and reschedule them */ 2135 /* queue pending timers and reschedule them */
1218 timers_reify (EV_A); /* relative timers called last */ 2136 timers_reify (EV_A); /* relative timers called last */
1219#if EV_PERIODICS 2137#if EV_PERIODIC_ENABLE
1220 periodics_reify (EV_A); /* absolute timers called first */ 2138 periodics_reify (EV_A); /* absolute timers called first */
1221#endif 2139#endif
1222 2140
2141#if EV_IDLE_ENABLE
1223 /* queue idle watchers unless io or timers are pending */ 2142 /* queue idle watchers unless other events are pending */
1224 if (idlecnt && !any_pending (EV_A)) 2143 idle_reify (EV_A);
1225 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2144#endif
1226 2145
1227 /* queue check watchers, to be executed first */ 2146 /* queue check watchers, to be executed first */
1228 if (checkcnt) 2147 if (expect_false (checkcnt))
1229 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2148 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1230 2149
1231 call_pending (EV_A); 2150 call_pending (EV_A);
1232 } 2151 }
1233 while (activecnt && !loop_done); 2152 while (expect_true (
2153 activecnt
2154 && !loop_done
2155 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2156 ));
1234 2157
1235 if (loop_done != 2) 2158 if (loop_done == EVUNLOOP_ONE)
1236 loop_done = 0; 2159 loop_done = EVUNLOOP_CANCEL;
2160
2161 --loop_depth;
1237} 2162}
1238 2163
1239void 2164void
1240ev_unloop (EV_P_ int how) 2165ev_unloop (EV_P_ int how)
1241{ 2166{
1242 loop_done = how; 2167 loop_done = how;
1243} 2168}
1244 2169
2170void
2171ev_ref (EV_P)
2172{
2173 ++activecnt;
2174}
2175
2176void
2177ev_unref (EV_P)
2178{
2179 --activecnt;
2180}
2181
2182void
2183ev_now_update (EV_P)
2184{
2185 time_update (EV_A_ 1e100);
2186}
2187
2188void
2189ev_suspend (EV_P)
2190{
2191 ev_now_update (EV_A);
2192}
2193
2194void
2195ev_resume (EV_P)
2196{
2197 ev_tstamp mn_prev = mn_now;
2198
2199 ev_now_update (EV_A);
2200 timers_reschedule (EV_A_ mn_now - mn_prev);
2201#if EV_PERIODIC_ENABLE
2202 /* TODO: really do this? */
2203 periodics_reschedule (EV_A);
2204#endif
2205}
2206
1245/*****************************************************************************/ 2207/*****************************************************************************/
2208/* singly-linked list management, used when the expected list length is short */
1246 2209
1247inline void 2210inline_size void
1248wlist_add (WL *head, WL elem) 2211wlist_add (WL *head, WL elem)
1249{ 2212{
1250 elem->next = *head; 2213 elem->next = *head;
1251 *head = elem; 2214 *head = elem;
1252} 2215}
1253 2216
1254inline void 2217inline_size void
1255wlist_del (WL *head, WL elem) 2218wlist_del (WL *head, WL elem)
1256{ 2219{
1257 while (*head) 2220 while (*head)
1258 { 2221 {
1259 if (*head == elem) 2222 if (*head == elem)
… …
1264 2227
1265 head = &(*head)->next; 2228 head = &(*head)->next;
1266 } 2229 }
1267} 2230}
1268 2231
2232/* internal, faster, version of ev_clear_pending */
1269inline void 2233inline_speed void
1270ev_clear_pending (EV_P_ W w) 2234clear_pending (EV_P_ W w)
1271{ 2235{
1272 if (w->pending) 2236 if (w->pending)
1273 { 2237 {
1274 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2238 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1275 w->pending = 0; 2239 w->pending = 0;
1276 } 2240 }
1277} 2241}
1278 2242
2243int
2244ev_clear_pending (EV_P_ void *w)
2245{
2246 W w_ = (W)w;
2247 int pending = w_->pending;
2248
2249 if (expect_true (pending))
2250 {
2251 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2252 p->w = (W)&pending_w;
2253 w_->pending = 0;
2254 return p->events;
2255 }
2256 else
2257 return 0;
2258}
2259
1279inline void 2260inline_size void
2261pri_adjust (EV_P_ W w)
2262{
2263 int pri = w->priority;
2264 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2265 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2266 w->priority = pri;
2267}
2268
2269inline_speed void
1280ev_start (EV_P_ W w, int active) 2270ev_start (EV_P_ W w, int active)
1281{ 2271{
1282 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2272 pri_adjust (EV_A_ w);
1283 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1284
1285 w->active = active; 2273 w->active = active;
1286 ev_ref (EV_A); 2274 ev_ref (EV_A);
1287} 2275}
1288 2276
1289inline void 2277inline_size void
1290ev_stop (EV_P_ W w) 2278ev_stop (EV_P_ W w)
1291{ 2279{
1292 ev_unref (EV_A); 2280 ev_unref (EV_A);
1293 w->active = 0; 2281 w->active = 0;
1294} 2282}
1295 2283
1296/*****************************************************************************/ 2284/*****************************************************************************/
1297 2285
1298void 2286void noinline
1299ev_io_start (EV_P_ struct ev_io *w) 2287ev_io_start (EV_P_ ev_io *w)
1300{ 2288{
1301 int fd = w->fd; 2289 int fd = w->fd;
1302 2290
1303 if (ev_is_active (w)) 2291 if (expect_false (ev_is_active (w)))
1304 return; 2292 return;
1305 2293
1306 assert (("ev_io_start called with negative fd", fd >= 0)); 2294 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2295 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2296
2297 EV_FREQUENT_CHECK;
1307 2298
1308 ev_start (EV_A_ (W)w, 1); 2299 ev_start (EV_A_ (W)w, 1);
1309 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2300 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1310 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2301 wlist_add (&anfds[fd].head, (WL)w);
1311 2302
1312 fd_change (EV_A_ fd); 2303 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
1313} 2304 w->events &= ~EV__IOFDSET;
1314 2305
1315void 2306 EV_FREQUENT_CHECK;
2307}
2308
2309void noinline
1316ev_io_stop (EV_P_ struct ev_io *w) 2310ev_io_stop (EV_P_ ev_io *w)
1317{ 2311{
1318 ev_clear_pending (EV_A_ (W)w); 2312 clear_pending (EV_A_ (W)w);
1319 if (!ev_is_active (w)) 2313 if (expect_false (!ev_is_active (w)))
1320 return; 2314 return;
1321 2315
1322 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2316 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1323 2317
2318 EV_FREQUENT_CHECK;
2319
1324 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2320 wlist_del (&anfds[w->fd].head, (WL)w);
1325 ev_stop (EV_A_ (W)w); 2321 ev_stop (EV_A_ (W)w);
1326 2322
1327 fd_change (EV_A_ w->fd); 2323 fd_change (EV_A_ w->fd, 1);
1328}
1329 2324
1330void 2325 EV_FREQUENT_CHECK;
2326}
2327
2328void noinline
1331ev_timer_start (EV_P_ struct ev_timer *w) 2329ev_timer_start (EV_P_ ev_timer *w)
1332{ 2330{
1333 if (ev_is_active (w)) 2331 if (expect_false (ev_is_active (w)))
1334 return; 2332 return;
1335 2333
1336 ((WT)w)->at += mn_now; 2334 ev_at (w) += mn_now;
1337 2335
1338 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2336 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1339 2337
2338 EV_FREQUENT_CHECK;
2339
2340 ++timercnt;
1340 ev_start (EV_A_ (W)w, ++timercnt); 2341 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1341 array_needsize (struct ev_timer *, timers, timermax, timercnt, (void)); 2342 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1342 timers [timercnt - 1] = w; 2343 ANHE_w (timers [ev_active (w)]) = (WT)w;
1343 upheap ((WT *)timers, timercnt - 1); 2344 ANHE_at_cache (timers [ev_active (w)]);
2345 upheap (timers, ev_active (w));
1344 2346
2347 EV_FREQUENT_CHECK;
2348
1345 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2349 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1346} 2350}
1347 2351
1348void 2352void noinline
1349ev_timer_stop (EV_P_ struct ev_timer *w) 2353ev_timer_stop (EV_P_ ev_timer *w)
1350{ 2354{
1351 ev_clear_pending (EV_A_ (W)w); 2355 clear_pending (EV_A_ (W)w);
1352 if (!ev_is_active (w)) 2356 if (expect_false (!ev_is_active (w)))
1353 return; 2357 return;
1354 2358
2359 EV_FREQUENT_CHECK;
2360
2361 {
2362 int active = ev_active (w);
2363
1355 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2364 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1356 2365
1357 if (((W)w)->active < timercnt--) 2366 --timercnt;
2367
2368 if (expect_true (active < timercnt + HEAP0))
1358 { 2369 {
1359 timers [((W)w)->active - 1] = timers [timercnt]; 2370 timers [active] = timers [timercnt + HEAP0];
1360 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2371 adjustheap (timers, timercnt, active);
1361 } 2372 }
2373 }
1362 2374
1363 ((WT)w)->at -= mn_now; 2375 EV_FREQUENT_CHECK;
2376
2377 ev_at (w) -= mn_now;
1364 2378
1365 ev_stop (EV_A_ (W)w); 2379 ev_stop (EV_A_ (W)w);
1366} 2380}
1367 2381
1368void 2382void noinline
1369ev_timer_again (EV_P_ struct ev_timer *w) 2383ev_timer_again (EV_P_ ev_timer *w)
1370{ 2384{
2385 EV_FREQUENT_CHECK;
2386
1371 if (ev_is_active (w)) 2387 if (ev_is_active (w))
1372 { 2388 {
1373 if (w->repeat) 2389 if (w->repeat)
1374 { 2390 {
1375 ((WT)w)->at = mn_now + w->repeat; 2391 ev_at (w) = mn_now + w->repeat;
2392 ANHE_at_cache (timers [ev_active (w)]);
1376 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2393 adjustheap (timers, timercnt, ev_active (w));
1377 } 2394 }
1378 else 2395 else
1379 ev_timer_stop (EV_A_ w); 2396 ev_timer_stop (EV_A_ w);
1380 } 2397 }
1381 else if (w->repeat) 2398 else if (w->repeat)
2399 {
2400 ev_at (w) = w->repeat;
1382 ev_timer_start (EV_A_ w); 2401 ev_timer_start (EV_A_ w);
1383} 2402 }
1384 2403
2404 EV_FREQUENT_CHECK;
2405}
2406
1385#if EV_PERIODICS 2407#if EV_PERIODIC_ENABLE
1386void 2408void noinline
1387ev_periodic_start (EV_P_ struct ev_periodic *w) 2409ev_periodic_start (EV_P_ ev_periodic *w)
1388{ 2410{
1389 if (ev_is_active (w)) 2411 if (expect_false (ev_is_active (w)))
1390 return; 2412 return;
1391 2413
1392 if (w->reschedule_cb) 2414 if (w->reschedule_cb)
1393 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2415 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1394 else if (w->interval) 2416 else if (w->interval)
1395 { 2417 {
1396 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2418 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1397 /* this formula differs from the one in periodic_reify because we do not always round up */ 2419 /* this formula differs from the one in periodic_reify because we do not always round up */
1398 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2420 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1399 } 2421 }
2422 else
2423 ev_at (w) = w->offset;
1400 2424
2425 EV_FREQUENT_CHECK;
2426
2427 ++periodiccnt;
1401 ev_start (EV_A_ (W)w, ++periodiccnt); 2428 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1402 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); 2429 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1403 periodics [periodiccnt - 1] = w; 2430 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1404 upheap ((WT *)periodics, periodiccnt - 1); 2431 ANHE_at_cache (periodics [ev_active (w)]);
2432 upheap (periodics, ev_active (w));
1405 2433
2434 EV_FREQUENT_CHECK;
2435
1406 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2436 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1407} 2437}
1408 2438
1409void 2439void noinline
1410ev_periodic_stop (EV_P_ struct ev_periodic *w) 2440ev_periodic_stop (EV_P_ ev_periodic *w)
1411{ 2441{
1412 ev_clear_pending (EV_A_ (W)w); 2442 clear_pending (EV_A_ (W)w);
1413 if (!ev_is_active (w)) 2443 if (expect_false (!ev_is_active (w)))
1414 return; 2444 return;
1415 2445
2446 EV_FREQUENT_CHECK;
2447
2448 {
2449 int active = ev_active (w);
2450
1416 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2451 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1417 2452
1418 if (((W)w)->active < periodiccnt--) 2453 --periodiccnt;
2454
2455 if (expect_true (active < periodiccnt + HEAP0))
1419 { 2456 {
1420 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2457 periodics [active] = periodics [periodiccnt + HEAP0];
1421 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2458 adjustheap (periodics, periodiccnt, active);
1422 } 2459 }
2460 }
2461
2462 EV_FREQUENT_CHECK;
1423 2463
1424 ev_stop (EV_A_ (W)w); 2464 ev_stop (EV_A_ (W)w);
1425} 2465}
1426 2466
1427void 2467void noinline
1428ev_periodic_again (EV_P_ struct ev_periodic *w) 2468ev_periodic_again (EV_P_ ev_periodic *w)
1429{ 2469{
1430 /* TODO: use adjustheap and recalculation */ 2470 /* TODO: use adjustheap and recalculation */
1431 ev_periodic_stop (EV_A_ w); 2471 ev_periodic_stop (EV_A_ w);
1432 ev_periodic_start (EV_A_ w); 2472 ev_periodic_start (EV_A_ w);
1433} 2473}
1434#endif 2474#endif
1435 2475
1436void
1437ev_idle_start (EV_P_ struct ev_idle *w)
1438{
1439 if (ev_is_active (w))
1440 return;
1441
1442 ev_start (EV_A_ (W)w, ++idlecnt);
1443 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1444 idles [idlecnt - 1] = w;
1445}
1446
1447void
1448ev_idle_stop (EV_P_ struct ev_idle *w)
1449{
1450 ev_clear_pending (EV_A_ (W)w);
1451 if (!ev_is_active (w))
1452 return;
1453
1454 idles [((W)w)->active - 1] = idles [--idlecnt];
1455 ev_stop (EV_A_ (W)w);
1456}
1457
1458void
1459ev_prepare_start (EV_P_ struct ev_prepare *w)
1460{
1461 if (ev_is_active (w))
1462 return;
1463
1464 ev_start (EV_A_ (W)w, ++preparecnt);
1465 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1466 prepares [preparecnt - 1] = w;
1467}
1468
1469void
1470ev_prepare_stop (EV_P_ struct ev_prepare *w)
1471{
1472 ev_clear_pending (EV_A_ (W)w);
1473 if (!ev_is_active (w))
1474 return;
1475
1476 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1477 ev_stop (EV_A_ (W)w);
1478}
1479
1480void
1481ev_check_start (EV_P_ struct ev_check *w)
1482{
1483 if (ev_is_active (w))
1484 return;
1485
1486 ev_start (EV_A_ (W)w, ++checkcnt);
1487 array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1488 checks [checkcnt - 1] = w;
1489}
1490
1491void
1492ev_check_stop (EV_P_ struct ev_check *w)
1493{
1494 ev_clear_pending (EV_A_ (W)w);
1495 if (!ev_is_active (w))
1496 return;
1497
1498 checks [((W)w)->active - 1] = checks [--checkcnt];
1499 ev_stop (EV_A_ (W)w);
1500}
1501
1502#ifndef SA_RESTART 2476#ifndef SA_RESTART
1503# define SA_RESTART 0 2477# define SA_RESTART 0
1504#endif 2478#endif
1505 2479
1506void 2480void noinline
1507ev_signal_start (EV_P_ struct ev_signal *w) 2481ev_signal_start (EV_P_ ev_signal *w)
1508{ 2482{
1509#if EV_MULTIPLICITY 2483#if EV_MULTIPLICITY
1510 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2484 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1511#endif 2485#endif
1512 if (ev_is_active (w)) 2486 if (expect_false (ev_is_active (w)))
1513 return; 2487 return;
1514 2488
1515 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2489 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2490
2491 evpipe_init (EV_A);
2492
2493 EV_FREQUENT_CHECK;
2494
2495 {
2496#ifndef _WIN32
2497 sigset_t full, prev;
2498 sigfillset (&full);
2499 sigprocmask (SIG_SETMASK, &full, &prev);
2500#endif
2501
2502 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2503
2504#ifndef _WIN32
2505 sigprocmask (SIG_SETMASK, &prev, 0);
2506#endif
2507 }
1516 2508
1517 ev_start (EV_A_ (W)w, 1); 2509 ev_start (EV_A_ (W)w, 1);
1518 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1519 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2510 wlist_add (&signals [w->signum - 1].head, (WL)w);
1520 2511
1521 if (!((WL)w)->next) 2512 if (!((WL)w)->next)
1522 { 2513 {
1523#if _WIN32 2514#if _WIN32
1524 signal (w->signum, sighandler); 2515 signal (w->signum, ev_sighandler);
1525#else 2516#else
1526 struct sigaction sa; 2517 struct sigaction sa;
1527 sa.sa_handler = sighandler; 2518 sa.sa_handler = ev_sighandler;
1528 sigfillset (&sa.sa_mask); 2519 sigfillset (&sa.sa_mask);
1529 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2520 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1530 sigaction (w->signum, &sa, 0); 2521 sigaction (w->signum, &sa, 0);
1531#endif 2522#endif
1532 } 2523 }
1533}
1534 2524
1535void 2525 EV_FREQUENT_CHECK;
2526}
2527
2528void noinline
1536ev_signal_stop (EV_P_ struct ev_signal *w) 2529ev_signal_stop (EV_P_ ev_signal *w)
1537{ 2530{
1538 ev_clear_pending (EV_A_ (W)w); 2531 clear_pending (EV_A_ (W)w);
1539 if (!ev_is_active (w)) 2532 if (expect_false (!ev_is_active (w)))
1540 return; 2533 return;
1541 2534
2535 EV_FREQUENT_CHECK;
2536
1542 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2537 wlist_del (&signals [w->signum - 1].head, (WL)w);
1543 ev_stop (EV_A_ (W)w); 2538 ev_stop (EV_A_ (W)w);
1544 2539
1545 if (!signals [w->signum - 1].head) 2540 if (!signals [w->signum - 1].head)
1546 signal (w->signum, SIG_DFL); 2541 signal (w->signum, SIG_DFL);
1547}
1548 2542
2543 EV_FREQUENT_CHECK;
2544}
2545
1549void 2546void
1550ev_child_start (EV_P_ struct ev_child *w) 2547ev_child_start (EV_P_ ev_child *w)
1551{ 2548{
1552#if EV_MULTIPLICITY 2549#if EV_MULTIPLICITY
1553 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2550 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1554#endif 2551#endif
1555 if (ev_is_active (w)) 2552 if (expect_false (ev_is_active (w)))
1556 return; 2553 return;
1557 2554
2555 EV_FREQUENT_CHECK;
2556
1558 ev_start (EV_A_ (W)w, 1); 2557 ev_start (EV_A_ (W)w, 1);
1559 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2558 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1560}
1561 2559
2560 EV_FREQUENT_CHECK;
2561}
2562
1562void 2563void
1563ev_child_stop (EV_P_ struct ev_child *w) 2564ev_child_stop (EV_P_ ev_child *w)
1564{ 2565{
1565 ev_clear_pending (EV_A_ (W)w); 2566 clear_pending (EV_A_ (W)w);
1566 if (!ev_is_active (w)) 2567 if (expect_false (!ev_is_active (w)))
1567 return; 2568 return;
1568 2569
2570 EV_FREQUENT_CHECK;
2571
1569 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2572 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1570 ev_stop (EV_A_ (W)w); 2573 ev_stop (EV_A_ (W)w);
2574
2575 EV_FREQUENT_CHECK;
1571} 2576}
2577
2578#if EV_STAT_ENABLE
2579
2580# ifdef _WIN32
2581# undef lstat
2582# define lstat(a,b) _stati64 (a,b)
2583# endif
2584
2585#define DEF_STAT_INTERVAL 5.0074891
2586#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2587#define MIN_STAT_INTERVAL 0.1074891
2588
2589static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2590
2591#if EV_USE_INOTIFY
2592# define EV_INOTIFY_BUFSIZE 8192
2593
2594static void noinline
2595infy_add (EV_P_ ev_stat *w)
2596{
2597 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);
2598
2599 if (w->wd < 0)
2600 {
2601 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2602 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2603
2604 /* monitor some parent directory for speedup hints */
2605 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2606 /* but an efficiency issue only */
2607 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2608 {
2609 char path [4096];
2610 strcpy (path, w->path);
2611
2612 do
2613 {
2614 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2615 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2616
2617 char *pend = strrchr (path, '/');
2618
2619 if (!pend || pend == path)
2620 break;
2621
2622 *pend = 0;
2623 w->wd = inotify_add_watch (fs_fd, path, mask);
2624 }
2625 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2626 }
2627 }
2628
2629 if (w->wd >= 0)
2630 {
2631 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2632
2633 /* now local changes will be tracked by inotify, but remote changes won't */
2634 /* unless the filesystem it known to be local, we therefore still poll */
2635 /* also do poll on <2.6.25, but with normal frequency */
2636 struct statfs sfs;
2637
2638 if (fs_2625 && !statfs (w->path, &sfs))
2639 if (sfs.f_type == 0x1373 /* devfs */
2640 || sfs.f_type == 0xEF53 /* ext2/3 */
2641 || sfs.f_type == 0x3153464a /* jfs */
2642 || sfs.f_type == 0x52654973 /* reiser3 */
2643 || sfs.f_type == 0x01021994 /* tempfs */
2644 || sfs.f_type == 0x58465342 /* xfs */)
2645 return;
2646
2647 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2648 ev_timer_again (EV_A_ &w->timer);
2649 }
2650}
2651
2652static void noinline
2653infy_del (EV_P_ ev_stat *w)
2654{
2655 int slot;
2656 int wd = w->wd;
2657
2658 if (wd < 0)
2659 return;
2660
2661 w->wd = -2;
2662 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2663 wlist_del (&fs_hash [slot].head, (WL)w);
2664
2665 /* remove this watcher, if others are watching it, they will rearm */
2666 inotify_rm_watch (fs_fd, wd);
2667}
2668
2669static void noinline
2670infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2671{
2672 if (slot < 0)
2673 /* overflow, need to check for all hash slots */
2674 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2675 infy_wd (EV_A_ slot, wd, ev);
2676 else
2677 {
2678 WL w_;
2679
2680 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2681 {
2682 ev_stat *w = (ev_stat *)w_;
2683 w_ = w_->next; /* lets us remove this watcher and all before it */
2684
2685 if (w->wd == wd || wd == -1)
2686 {
2687 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2688 {
2689 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2690 w->wd = -1;
2691 infy_add (EV_A_ w); /* re-add, no matter what */
2692 }
2693
2694 stat_timer_cb (EV_A_ &w->timer, 0);
2695 }
2696 }
2697 }
2698}
2699
2700static void
2701infy_cb (EV_P_ ev_io *w, int revents)
2702{
2703 char buf [EV_INOTIFY_BUFSIZE];
2704 struct inotify_event *ev = (struct inotify_event *)buf;
2705 int ofs;
2706 int len = read (fs_fd, buf, sizeof (buf));
2707
2708 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2709 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2710}
2711
2712inline_size void
2713check_2625 (EV_P)
2714{
2715 /* kernels < 2.6.25 are borked
2716 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2717 */
2718 struct utsname buf;
2719 int major, minor, micro;
2720
2721 if (uname (&buf))
2722 return;
2723
2724 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2725 return;
2726
2727 if (major < 2
2728 || (major == 2 && minor < 6)
2729 || (major == 2 && minor == 6 && micro < 25))
2730 return;
2731
2732 fs_2625 = 1;
2733}
2734
2735inline_size void
2736infy_init (EV_P)
2737{
2738 if (fs_fd != -2)
2739 return;
2740
2741 fs_fd = -1;
2742
2743 check_2625 (EV_A);
2744
2745 fs_fd = inotify_init ();
2746
2747 if (fs_fd >= 0)
2748 {
2749 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2750 ev_set_priority (&fs_w, EV_MAXPRI);
2751 ev_io_start (EV_A_ &fs_w);
2752 }
2753}
2754
2755inline_size void
2756infy_fork (EV_P)
2757{
2758 int slot;
2759
2760 if (fs_fd < 0)
2761 return;
2762
2763 close (fs_fd);
2764 fs_fd = inotify_init ();
2765
2766 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2767 {
2768 WL w_ = fs_hash [slot].head;
2769 fs_hash [slot].head = 0;
2770
2771 while (w_)
2772 {
2773 ev_stat *w = (ev_stat *)w_;
2774 w_ = w_->next; /* lets us add this watcher */
2775
2776 w->wd = -1;
2777
2778 if (fs_fd >= 0)
2779 infy_add (EV_A_ w); /* re-add, no matter what */
2780 else
2781 ev_timer_again (EV_A_ &w->timer);
2782 }
2783 }
2784}
2785
2786#endif
2787
2788#ifdef _WIN32
2789# define EV_LSTAT(p,b) _stati64 (p, b)
2790#else
2791# define EV_LSTAT(p,b) lstat (p, b)
2792#endif
2793
2794void
2795ev_stat_stat (EV_P_ ev_stat *w)
2796{
2797 if (lstat (w->path, &w->attr) < 0)
2798 w->attr.st_nlink = 0;
2799 else if (!w->attr.st_nlink)
2800 w->attr.st_nlink = 1;
2801}
2802
2803static void noinline
2804stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2805{
2806 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2807
2808 /* we copy this here each the time so that */
2809 /* prev has the old value when the callback gets invoked */
2810 w->prev = w->attr;
2811 ev_stat_stat (EV_A_ w);
2812
2813 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2814 if (
2815 w->prev.st_dev != w->attr.st_dev
2816 || w->prev.st_ino != w->attr.st_ino
2817 || w->prev.st_mode != w->attr.st_mode
2818 || w->prev.st_nlink != w->attr.st_nlink
2819 || w->prev.st_uid != w->attr.st_uid
2820 || w->prev.st_gid != w->attr.st_gid
2821 || w->prev.st_rdev != w->attr.st_rdev
2822 || w->prev.st_size != w->attr.st_size
2823 || w->prev.st_atime != w->attr.st_atime
2824 || w->prev.st_mtime != w->attr.st_mtime
2825 || w->prev.st_ctime != w->attr.st_ctime
2826 ) {
2827 #if EV_USE_INOTIFY
2828 if (fs_fd >= 0)
2829 {
2830 infy_del (EV_A_ w);
2831 infy_add (EV_A_ w);
2832 ev_stat_stat (EV_A_ w); /* avoid race... */
2833 }
2834 #endif
2835
2836 ev_feed_event (EV_A_ w, EV_STAT);
2837 }
2838}
2839
2840void
2841ev_stat_start (EV_P_ ev_stat *w)
2842{
2843 if (expect_false (ev_is_active (w)))
2844 return;
2845
2846 ev_stat_stat (EV_A_ w);
2847
2848 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2849 w->interval = MIN_STAT_INTERVAL;
2850
2851 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2852 ev_set_priority (&w->timer, ev_priority (w));
2853
2854#if EV_USE_INOTIFY
2855 infy_init (EV_A);
2856
2857 if (fs_fd >= 0)
2858 infy_add (EV_A_ w);
2859 else
2860#endif
2861 ev_timer_again (EV_A_ &w->timer);
2862
2863 ev_start (EV_A_ (W)w, 1);
2864
2865 EV_FREQUENT_CHECK;
2866}
2867
2868void
2869ev_stat_stop (EV_P_ ev_stat *w)
2870{
2871 clear_pending (EV_A_ (W)w);
2872 if (expect_false (!ev_is_active (w)))
2873 return;
2874
2875 EV_FREQUENT_CHECK;
2876
2877#if EV_USE_INOTIFY
2878 infy_del (EV_A_ w);
2879#endif
2880 ev_timer_stop (EV_A_ &w->timer);
2881
2882 ev_stop (EV_A_ (W)w);
2883
2884 EV_FREQUENT_CHECK;
2885}
2886#endif
2887
2888#if EV_IDLE_ENABLE
2889void
2890ev_idle_start (EV_P_ ev_idle *w)
2891{
2892 if (expect_false (ev_is_active (w)))
2893 return;
2894
2895 pri_adjust (EV_A_ (W)w);
2896
2897 EV_FREQUENT_CHECK;
2898
2899 {
2900 int active = ++idlecnt [ABSPRI (w)];
2901
2902 ++idleall;
2903 ev_start (EV_A_ (W)w, active);
2904
2905 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2906 idles [ABSPRI (w)][active - 1] = w;
2907 }
2908
2909 EV_FREQUENT_CHECK;
2910}
2911
2912void
2913ev_idle_stop (EV_P_ ev_idle *w)
2914{
2915 clear_pending (EV_A_ (W)w);
2916 if (expect_false (!ev_is_active (w)))
2917 return;
2918
2919 EV_FREQUENT_CHECK;
2920
2921 {
2922 int active = ev_active (w);
2923
2924 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2925 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2926
2927 ev_stop (EV_A_ (W)w);
2928 --idleall;
2929 }
2930
2931 EV_FREQUENT_CHECK;
2932}
2933#endif
2934
2935void
2936ev_prepare_start (EV_P_ ev_prepare *w)
2937{
2938 if (expect_false (ev_is_active (w)))
2939 return;
2940
2941 EV_FREQUENT_CHECK;
2942
2943 ev_start (EV_A_ (W)w, ++preparecnt);
2944 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2945 prepares [preparecnt - 1] = w;
2946
2947 EV_FREQUENT_CHECK;
2948}
2949
2950void
2951ev_prepare_stop (EV_P_ ev_prepare *w)
2952{
2953 clear_pending (EV_A_ (W)w);
2954 if (expect_false (!ev_is_active (w)))
2955 return;
2956
2957 EV_FREQUENT_CHECK;
2958
2959 {
2960 int active = ev_active (w);
2961
2962 prepares [active - 1] = prepares [--preparecnt];
2963 ev_active (prepares [active - 1]) = active;
2964 }
2965
2966 ev_stop (EV_A_ (W)w);
2967
2968 EV_FREQUENT_CHECK;
2969}
2970
2971void
2972ev_check_start (EV_P_ ev_check *w)
2973{
2974 if (expect_false (ev_is_active (w)))
2975 return;
2976
2977 EV_FREQUENT_CHECK;
2978
2979 ev_start (EV_A_ (W)w, ++checkcnt);
2980 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2981 checks [checkcnt - 1] = w;
2982
2983 EV_FREQUENT_CHECK;
2984}
2985
2986void
2987ev_check_stop (EV_P_ ev_check *w)
2988{
2989 clear_pending (EV_A_ (W)w);
2990 if (expect_false (!ev_is_active (w)))
2991 return;
2992
2993 EV_FREQUENT_CHECK;
2994
2995 {
2996 int active = ev_active (w);
2997
2998 checks [active - 1] = checks [--checkcnt];
2999 ev_active (checks [active - 1]) = active;
3000 }
3001
3002 ev_stop (EV_A_ (W)w);
3003
3004 EV_FREQUENT_CHECK;
3005}
3006
3007#if EV_EMBED_ENABLE
3008void noinline
3009ev_embed_sweep (EV_P_ ev_embed *w)
3010{
3011 ev_loop (w->other, EVLOOP_NONBLOCK);
3012}
3013
3014static void
3015embed_io_cb (EV_P_ ev_io *io, int revents)
3016{
3017 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3018
3019 if (ev_cb (w))
3020 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3021 else
3022 ev_loop (w->other, EVLOOP_NONBLOCK);
3023}
3024
3025static void
3026embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3027{
3028 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3029
3030 {
3031 struct ev_loop *loop = w->other;
3032
3033 while (fdchangecnt)
3034 {
3035 fd_reify (EV_A);
3036 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3037 }
3038 }
3039}
3040
3041static void
3042embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3043{
3044 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3045
3046 ev_embed_stop (EV_A_ w);
3047
3048 {
3049 struct ev_loop *loop = w->other;
3050
3051 ev_loop_fork (EV_A);
3052 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3053 }
3054
3055 ev_embed_start (EV_A_ w);
3056}
3057
3058#if 0
3059static void
3060embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3061{
3062 ev_idle_stop (EV_A_ idle);
3063}
3064#endif
3065
3066void
3067ev_embed_start (EV_P_ ev_embed *w)
3068{
3069 if (expect_false (ev_is_active (w)))
3070 return;
3071
3072 {
3073 struct ev_loop *loop = w->other;
3074 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3075 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3076 }
3077
3078 EV_FREQUENT_CHECK;
3079
3080 ev_set_priority (&w->io, ev_priority (w));
3081 ev_io_start (EV_A_ &w->io);
3082
3083 ev_prepare_init (&w->prepare, embed_prepare_cb);
3084 ev_set_priority (&w->prepare, EV_MINPRI);
3085 ev_prepare_start (EV_A_ &w->prepare);
3086
3087 ev_fork_init (&w->fork, embed_fork_cb);
3088 ev_fork_start (EV_A_ &w->fork);
3089
3090 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3091
3092 ev_start (EV_A_ (W)w, 1);
3093
3094 EV_FREQUENT_CHECK;
3095}
3096
3097void
3098ev_embed_stop (EV_P_ ev_embed *w)
3099{
3100 clear_pending (EV_A_ (W)w);
3101 if (expect_false (!ev_is_active (w)))
3102 return;
3103
3104 EV_FREQUENT_CHECK;
3105
3106 ev_io_stop (EV_A_ &w->io);
3107 ev_prepare_stop (EV_A_ &w->prepare);
3108 ev_fork_stop (EV_A_ &w->fork);
3109
3110 EV_FREQUENT_CHECK;
3111}
3112#endif
3113
3114#if EV_FORK_ENABLE
3115void
3116ev_fork_start (EV_P_ ev_fork *w)
3117{
3118 if (expect_false (ev_is_active (w)))
3119 return;
3120
3121 EV_FREQUENT_CHECK;
3122
3123 ev_start (EV_A_ (W)w, ++forkcnt);
3124 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3125 forks [forkcnt - 1] = w;
3126
3127 EV_FREQUENT_CHECK;
3128}
3129
3130void
3131ev_fork_stop (EV_P_ ev_fork *w)
3132{
3133 clear_pending (EV_A_ (W)w);
3134 if (expect_false (!ev_is_active (w)))
3135 return;
3136
3137 EV_FREQUENT_CHECK;
3138
3139 {
3140 int active = ev_active (w);
3141
3142 forks [active - 1] = forks [--forkcnt];
3143 ev_active (forks [active - 1]) = active;
3144 }
3145
3146 ev_stop (EV_A_ (W)w);
3147
3148 EV_FREQUENT_CHECK;
3149}
3150#endif
3151
3152#if EV_ASYNC_ENABLE
3153void
3154ev_async_start (EV_P_ ev_async *w)
3155{
3156 if (expect_false (ev_is_active (w)))
3157 return;
3158
3159 evpipe_init (EV_A);
3160
3161 EV_FREQUENT_CHECK;
3162
3163 ev_start (EV_A_ (W)w, ++asynccnt);
3164 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3165 asyncs [asynccnt - 1] = w;
3166
3167 EV_FREQUENT_CHECK;
3168}
3169
3170void
3171ev_async_stop (EV_P_ ev_async *w)
3172{
3173 clear_pending (EV_A_ (W)w);
3174 if (expect_false (!ev_is_active (w)))
3175 return;
3176
3177 EV_FREQUENT_CHECK;
3178
3179 {
3180 int active = ev_active (w);
3181
3182 asyncs [active - 1] = asyncs [--asynccnt];
3183 ev_active (asyncs [active - 1]) = active;
3184 }
3185
3186 ev_stop (EV_A_ (W)w);
3187
3188 EV_FREQUENT_CHECK;
3189}
3190
3191void
3192ev_async_send (EV_P_ ev_async *w)
3193{
3194 w->sent = 1;
3195 evpipe_write (EV_A_ &gotasync);
3196}
3197#endif
1572 3198
1573/*****************************************************************************/ 3199/*****************************************************************************/
1574 3200
1575struct ev_once 3201struct ev_once
1576{ 3202{
1577 struct ev_io io; 3203 ev_io io;
1578 struct ev_timer to; 3204 ev_timer to;
1579 void (*cb)(int revents, void *arg); 3205 void (*cb)(int revents, void *arg);
1580 void *arg; 3206 void *arg;
1581}; 3207};
1582 3208
1583static void 3209static void
1584once_cb (EV_P_ struct ev_once *once, int revents) 3210once_cb (EV_P_ struct ev_once *once, int revents)
1585{ 3211{
1586 void (*cb)(int revents, void *arg) = once->cb; 3212 void (*cb)(int revents, void *arg) = once->cb;
1587 void *arg = once->arg; 3213 void *arg = once->arg;
1588 3214
1589 ev_io_stop (EV_A_ &once->io); 3215 ev_io_stop (EV_A_ &once->io);
1590 ev_timer_stop (EV_A_ &once->to); 3216 ev_timer_stop (EV_A_ &once->to);
1591 ev_free (once); 3217 ev_free (once);
1592 3218
1593 cb (revents, arg); 3219 cb (revents, arg);
1594} 3220}
1595 3221
1596static void 3222static void
1597once_cb_io (EV_P_ struct ev_io *w, int revents) 3223once_cb_io (EV_P_ ev_io *w, int revents)
1598{ 3224{
1599 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3225 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3226
3227 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1600} 3228}
1601 3229
1602static void 3230static void
1603once_cb_to (EV_P_ struct ev_timer *w, int revents) 3231once_cb_to (EV_P_ ev_timer *w, int revents)
1604{ 3232{
1605 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3233 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3234
3235 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1606} 3236}
1607 3237
1608void 3238void
1609ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3239ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1610{ 3240{
1611 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3241 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1612 3242
1613 if (!once) 3243 if (expect_false (!once))
3244 {
1614 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3245 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1615 else 3246 return;
1616 { 3247 }
3248
1617 once->cb = cb; 3249 once->cb = cb;
1618 once->arg = arg; 3250 once->arg = arg;
1619 3251
1620 ev_init (&once->io, once_cb_io); 3252 ev_init (&once->io, once_cb_io);
1621 if (fd >= 0) 3253 if (fd >= 0)
3254 {
3255 ev_io_set (&once->io, fd, events);
3256 ev_io_start (EV_A_ &once->io);
3257 }
3258
3259 ev_init (&once->to, once_cb_to);
3260 if (timeout >= 0.)
3261 {
3262 ev_timer_set (&once->to, timeout, 0.);
3263 ev_timer_start (EV_A_ &once->to);
3264 }
3265}
3266
3267/*****************************************************************************/
3268
3269#if EV_WALK_ENABLE
3270void
3271ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3272{
3273 int i, j;
3274 ev_watcher_list *wl, *wn;
3275
3276 if (types & (EV_IO | EV_EMBED))
3277 for (i = 0; i < anfdmax; ++i)
3278 for (wl = anfds [i].head; wl; )
1622 { 3279 {
1623 ev_io_set (&once->io, fd, events); 3280 wn = wl->next;
1624 ev_io_start (EV_A_ &once->io); 3281
3282#if EV_EMBED_ENABLE
3283 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3284 {
3285 if (types & EV_EMBED)
3286 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3287 }
3288 else
3289#endif
3290#if EV_USE_INOTIFY
3291 if (ev_cb ((ev_io *)wl) == infy_cb)
3292 ;
3293 else
3294#endif
3295 if ((ev_io *)wl != &pipe_w)
3296 if (types & EV_IO)
3297 cb (EV_A_ EV_IO, wl);
3298
3299 wl = wn;
1625 } 3300 }
1626 3301
1627 ev_init (&once->to, once_cb_to); 3302 if (types & (EV_TIMER | EV_STAT))
1628 if (timeout >= 0.) 3303 for (i = timercnt + HEAP0; i-- > HEAP0; )
3304#if EV_STAT_ENABLE
3305 /*TODO: timer is not always active*/
3306 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1629 { 3307 {
1630 ev_timer_set (&once->to, timeout, 0.); 3308 if (types & EV_STAT)
1631 ev_timer_start (EV_A_ &once->to); 3309 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1632 } 3310 }
1633 } 3311 else
3312#endif
3313 if (types & EV_TIMER)
3314 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3315
3316#if EV_PERIODIC_ENABLE
3317 if (types & EV_PERIODIC)
3318 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3319 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3320#endif
3321
3322#if EV_IDLE_ENABLE
3323 if (types & EV_IDLE)
3324 for (j = NUMPRI; i--; )
3325 for (i = idlecnt [j]; i--; )
3326 cb (EV_A_ EV_IDLE, idles [j][i]);
3327#endif
3328
3329#if EV_FORK_ENABLE
3330 if (types & EV_FORK)
3331 for (i = forkcnt; i--; )
3332 if (ev_cb (forks [i]) != embed_fork_cb)
3333 cb (EV_A_ EV_FORK, forks [i]);
3334#endif
3335
3336#if EV_ASYNC_ENABLE
3337 if (types & EV_ASYNC)
3338 for (i = asynccnt; i--; )
3339 cb (EV_A_ EV_ASYNC, asyncs [i]);
3340#endif
3341
3342 if (types & EV_PREPARE)
3343 for (i = preparecnt; i--; )
3344#if EV_EMBED_ENABLE
3345 if (ev_cb (prepares [i]) != embed_prepare_cb)
3346#endif
3347 cb (EV_A_ EV_PREPARE, prepares [i]);
3348
3349 if (types & EV_CHECK)
3350 for (i = checkcnt; i--; )
3351 cb (EV_A_ EV_CHECK, checks [i]);
3352
3353 if (types & EV_SIGNAL)
3354 for (i = 0; i < signalmax; ++i)
3355 for (wl = signals [i].head; wl; )
3356 {
3357 wn = wl->next;
3358 cb (EV_A_ EV_SIGNAL, wl);
3359 wl = wn;
3360 }
3361
3362 if (types & EV_CHILD)
3363 for (i = EV_PID_HASHSIZE; i--; )
3364 for (wl = childs [i]; wl; )
3365 {
3366 wn = wl->next;
3367 cb (EV_A_ EV_CHILD, wl);
3368 wl = wn;
3369 }
3370/* EV_STAT 0x00001000 /* stat data changed */
3371/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
1634} 3372}
3373#endif
3374
3375#if EV_MULTIPLICITY
3376 #include "ev_wrap.h"
3377#endif
1635 3378
1636#ifdef __cplusplus 3379#ifdef __cplusplus
1637} 3380}
1638#endif 3381#endif
1639 3382

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