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Comparing libev/ev.c (file contents):
Revision 1.82 by root, Fri Nov 9 20:55:09 2007 UTC vs.
Revision 1.225 by root, Wed Apr 16 01:37:14 2008 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 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
31#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
32# include "config.h" 49# include "config.h"
50# endif
33 51
34# if HAVE_CLOCK_GETTIME 52# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC
35# define EV_USE_MONOTONIC 1 54# define EV_USE_MONOTONIC 1
55# endif
56# ifndef EV_USE_REALTIME
36# define EV_USE_REALTIME 1 57# define EV_USE_REALTIME 1
58# endif
59# else
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0
62# endif
63# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0
65# endif
37# endif 66# endif
38 67
39# if HAVE_SELECT && HAVE_SYS_SELECT_H 68# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
40# define EV_USE_SELECT 1 70# define EV_USE_NANOSLEEP 1
71# else
72# define EV_USE_NANOSLEEP 0
73# endif
41# endif 74# endif
42 75
43# if HAVE_POLL && HAVE_POLL_H 76# ifndef EV_USE_SELECT
77# if HAVE_SELECT && HAVE_SYS_SELECT_H
44# define EV_USE_POLL 1 78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif
45# endif 82# endif
46 83
47# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
48# define EV_USE_EPOLL 1 86# define EV_USE_POLL 1
87# else
88# define EV_USE_POLL 0
89# endif
49# endif 90# endif
50 91
51# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
52# define EV_USE_KQUEUE 1 94# define EV_USE_EPOLL 1
95# else
96# define EV_USE_EPOLL 0
97# endif
53# endif 98# endif
99
100# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif
106# endif
107
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1
111# else
112# define EV_USE_PORT 0
113# endif
114# endif
54 115
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1
119# else
120# define EV_USE_INOTIFY 0
121# endif
122# endif
123
124# ifndef EV_USE_EVENTFD
125# if HAVE_EVENTFD
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif
130# endif
131
55#endif 132#endif
56 133
57#include <math.h> 134#include <math.h>
58#include <stdlib.h> 135#include <stdlib.h>
59#include <fcntl.h> 136#include <fcntl.h>
… …
66#include <sys/types.h> 143#include <sys/types.h>
67#include <time.h> 144#include <time.h>
68 145
69#include <signal.h> 146#include <signal.h>
70 147
71#ifndef WIN32
72# include <unistd.h>
73# include <sys/time.h>
74# include <sys/wait.h>
75#endif
76/**/
77
78#ifndef EV_USE_MONOTONIC
79# define EV_USE_MONOTONIC 1
80#endif
81
82#ifndef EV_USE_SELECT
83# define EV_USE_SELECT 1
84#endif
85
86#ifndef EV_USE_POLL
87# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
88#endif
89
90#ifndef EV_USE_EPOLL
91# define EV_USE_EPOLL 0
92#endif
93
94#ifndef EV_USE_KQUEUE
95# define EV_USE_KQUEUE 0
96#endif
97
98#ifndef EV_USE_WIN32
99# ifdef WIN32
100# define EV_USE_WIN32 0 /* it does not exist, use select */
101# undef EV_USE_SELECT
102# define EV_USE_SELECT 1
103# else
104# define EV_USE_WIN32 0
105# endif
106#endif
107
108#ifndef EV_USE_REALTIME
109# define EV_USE_REALTIME 1
110#endif
111
112/**/
113
114#ifndef CLOCK_MONOTONIC
115# undef EV_USE_MONOTONIC
116# define EV_USE_MONOTONIC 0
117#endif
118
119#ifndef CLOCK_REALTIME
120# undef EV_USE_REALTIME
121# define EV_USE_REALTIME 0
122#endif
123
124/**/
125
126#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
127#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
128#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
129/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
130
131#ifdef EV_H 148#ifdef EV_H
132# include EV_H 149# include EV_H
133#else 150#else
134# include "ev.h" 151# include "ev.h"
135#endif 152#endif
136 153
154#ifndef _WIN32
155# include <sys/time.h>
156# include <sys/wait.h>
157# include <unistd.h>
158#else
159# define WIN32_LEAN_AND_MEAN
160# include <windows.h>
161# ifndef EV_SELECT_IS_WINSOCKET
162# define EV_SELECT_IS_WINSOCKET 1
163# endif
164#endif
165
166/* this block tries to deduce configuration from header-defined symbols and defaults */
167
168#ifndef EV_USE_MONOTONIC
169# define EV_USE_MONOTONIC 0
170#endif
171
172#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0
174#endif
175
176#ifndef EV_USE_NANOSLEEP
177# define EV_USE_NANOSLEEP 0
178#endif
179
180#ifndef EV_USE_SELECT
181# define EV_USE_SELECT 1
182#endif
183
184#ifndef EV_USE_POLL
185# ifdef _WIN32
186# define EV_USE_POLL 0
187# else
188# define EV_USE_POLL 1
189# endif
190#endif
191
192#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1
195# else
196# define EV_USE_EPOLL 0
197# endif
198#endif
199
200#ifndef EV_USE_KQUEUE
201# define EV_USE_KQUEUE 0
202#endif
203
204#ifndef EV_USE_PORT
205# define EV_USE_PORT 0
206#endif
207
208#ifndef EV_USE_INOTIFY
209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210# define EV_USE_INOTIFY 1
211# else
212# define EV_USE_INOTIFY 0
213# endif
214#endif
215
216#ifndef EV_PID_HASHSIZE
217# if EV_MINIMAL
218# define EV_PID_HASHSIZE 1
219# else
220# define EV_PID_HASHSIZE 16
221# endif
222#endif
223
224#ifndef EV_INOTIFY_HASHSIZE
225# if EV_MINIMAL
226# define EV_INOTIFY_HASHSIZE 1
227# else
228# define EV_INOTIFY_HASHSIZE 16
229# endif
230#endif
231
232#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1
235# else
236# define EV_USE_EVENTFD 0
237# endif
238#endif
239
240/* this block fixes any misconfiguration where we know we run into trouble otherwise */
241
242#ifndef CLOCK_MONOTONIC
243# undef EV_USE_MONOTONIC
244# define EV_USE_MONOTONIC 0
245#endif
246
247#ifndef CLOCK_REALTIME
248# undef EV_USE_REALTIME
249# define EV_USE_REALTIME 0
250#endif
251
252#if !EV_STAT_ENABLE
253# undef EV_USE_INOTIFY
254# define EV_USE_INOTIFY 0
255#endif
256
257#if !EV_USE_NANOSLEEP
258# ifndef _WIN32
259# include <sys/select.h>
260# endif
261#endif
262
263#if EV_USE_INOTIFY
264# include <sys/inotify.h>
265#endif
266
267#if EV_SELECT_IS_WINSOCKET
268# include <winsock.h>
269#endif
270
271#if EV_USE_EVENTFD
272/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
273# include <stdint.h>
274# ifdef __cplusplus
275extern "C" {
276# endif
277int eventfd (unsigned int initval, int flags);
278# ifdef __cplusplus
279}
280# endif
281#endif
282
283/**/
284
285/*
286 * This is used to avoid floating point rounding problems.
287 * It is added to ev_rt_now when scheduling periodics
288 * to ensure progress, time-wise, even when rounding
289 * errors are against us.
290 * This value is good at least till the year 4000.
291 * Better solutions welcome.
292 */
293#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
294
295#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
296#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
297/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
298
137#if __GNUC__ >= 3 299#if __GNUC__ >= 4
138# define expect(expr,value) __builtin_expect ((expr),(value)) 300# define expect(expr,value) __builtin_expect ((expr),(value))
139# define inline inline 301# define noinline __attribute__ ((noinline))
140#else 302#else
141# define expect(expr,value) (expr) 303# define expect(expr,value) (expr)
142# define inline static 304# define noinline
305# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
306# define inline
307# endif
143#endif 308#endif
144 309
145#define expect_false(expr) expect ((expr) != 0, 0) 310#define expect_false(expr) expect ((expr) != 0, 0)
146#define expect_true(expr) expect ((expr) != 0, 1) 311#define expect_true(expr) expect ((expr) != 0, 1)
312#define inline_size static inline
313
314#if EV_MINIMAL
315# define inline_speed static noinline
316#else
317# define inline_speed static inline
318#endif
147 319
148#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 320#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
149#define ABSPRI(w) ((w)->priority - EV_MINPRI) 321#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
150 322
323#define EMPTY /* required for microsofts broken pseudo-c compiler */
324#define EMPTY2(a,b) /* used to suppress some warnings */
325
151typedef struct ev_watcher *W; 326typedef ev_watcher *W;
152typedef struct ev_watcher_list *WL; 327typedef ev_watcher_list *WL;
153typedef struct ev_watcher_time *WT; 328typedef ev_watcher_time *WT;
154 329
330#if EV_USE_MONOTONIC
331/* sig_atomic_t is used to avoid per-thread variables or locking but still */
332/* giving it a reasonably high chance of working on typical architetcures */
155static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 333static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
334#endif
156 335
336#ifdef _WIN32
157#include "ev_win32.c" 337# include "ev_win32.c"
338#endif
158 339
159/*****************************************************************************/ 340/*****************************************************************************/
160 341
161static void (*syserr_cb)(const char *msg); 342static void (*syserr_cb)(const char *msg);
162 343
344void
163void ev_set_syserr_cb (void (*cb)(const char *msg)) 345ev_set_syserr_cb (void (*cb)(const char *msg))
164{ 346{
165 syserr_cb = cb; 347 syserr_cb = cb;
166} 348}
167 349
168static void 350static void noinline
169syserr (const char *msg) 351syserr (const char *msg)
170{ 352{
171 if (!msg) 353 if (!msg)
172 msg = "(libev) system error"; 354 msg = "(libev) system error";
173 355
… …
178 perror (msg); 360 perror (msg);
179 abort (); 361 abort ();
180 } 362 }
181} 363}
182 364
365static void *
366ev_realloc_emul (void *ptr, long size)
367{
368 /* some systems, notably openbsd and darwin, fail to properly
369 * implement realloc (x, 0) (as required by both ansi c-98 and
370 * the single unix specification, so work around them here.
371 */
372
373 if (size)
374 return realloc (ptr, size);
375
376 free (ptr);
377 return 0;
378}
379
183static void *(*alloc)(void *ptr, long size); 380static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
184 381
382void
185void ev_set_allocator (void *(*cb)(void *ptr, long size)) 383ev_set_allocator (void *(*cb)(void *ptr, long size))
186{ 384{
187 alloc = cb; 385 alloc = cb;
188} 386}
189 387
190static void * 388inline_speed void *
191ev_realloc (void *ptr, long size) 389ev_realloc (void *ptr, long size)
192{ 390{
193 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 391 ptr = alloc (ptr, size);
194 392
195 if (!ptr && size) 393 if (!ptr && size)
196 { 394 {
197 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 395 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
198 abort (); 396 abort ();
… …
209typedef struct 407typedef struct
210{ 408{
211 WL head; 409 WL head;
212 unsigned char events; 410 unsigned char events;
213 unsigned char reify; 411 unsigned char reify;
412#if EV_SELECT_IS_WINSOCKET
413 SOCKET handle;
414#endif
214} ANFD; 415} ANFD;
215 416
216typedef struct 417typedef struct
217{ 418{
218 W w; 419 W w;
219 int events; 420 int events;
220} ANPENDING; 421} ANPENDING;
221 422
423#if EV_USE_INOTIFY
424typedef struct
425{
426 WL head;
427} ANFS;
428#endif
429
222#if EV_MULTIPLICITY 430#if EV_MULTIPLICITY
223 431
224 struct ev_loop 432 struct ev_loop
225 { 433 {
434 ev_tstamp ev_rt_now;
435 #define ev_rt_now ((loop)->ev_rt_now)
226 #define VAR(name,decl) decl; 436 #define VAR(name,decl) decl;
227 #include "ev_vars.h" 437 #include "ev_vars.h"
228 #undef VAR 438 #undef VAR
229 }; 439 };
230 #include "ev_wrap.h" 440 #include "ev_wrap.h"
231 441
232 struct ev_loop default_loop_struct; 442 static struct ev_loop default_loop_struct;
233 static struct ev_loop *default_loop; 443 struct ev_loop *ev_default_loop_ptr;
234 444
235#else 445#else
236 446
447 ev_tstamp ev_rt_now;
237 #define VAR(name,decl) static decl; 448 #define VAR(name,decl) static decl;
238 #include "ev_vars.h" 449 #include "ev_vars.h"
239 #undef VAR 450 #undef VAR
240 451
241 static int default_loop; 452 static int ev_default_loop_ptr;
242 453
243#endif 454#endif
244 455
245/*****************************************************************************/ 456/*****************************************************************************/
246 457
247inline ev_tstamp 458ev_tstamp
248ev_time (void) 459ev_time (void)
249{ 460{
250#if EV_USE_REALTIME 461#if EV_USE_REALTIME
251 struct timespec ts; 462 struct timespec ts;
252 clock_gettime (CLOCK_REALTIME, &ts); 463 clock_gettime (CLOCK_REALTIME, &ts);
… …
256 gettimeofday (&tv, 0); 467 gettimeofday (&tv, 0);
257 return tv.tv_sec + tv.tv_usec * 1e-6; 468 return tv.tv_sec + tv.tv_usec * 1e-6;
258#endif 469#endif
259} 470}
260 471
261inline ev_tstamp 472ev_tstamp inline_size
262get_clock (void) 473get_clock (void)
263{ 474{
264#if EV_USE_MONOTONIC 475#if EV_USE_MONOTONIC
265 if (expect_true (have_monotonic)) 476 if (expect_true (have_monotonic))
266 { 477 {
… …
271#endif 482#endif
272 483
273 return ev_time (); 484 return ev_time ();
274} 485}
275 486
487#if EV_MULTIPLICITY
276ev_tstamp 488ev_tstamp
277ev_now (EV_P) 489ev_now (EV_P)
278{ 490{
279 return rt_now; 491 return ev_rt_now;
280} 492}
493#endif
281 494
282#define array_roundsize(type,n) ((n) | 4 & ~3) 495void
496ev_sleep (ev_tstamp delay)
497{
498 if (delay > 0.)
499 {
500#if EV_USE_NANOSLEEP
501 struct timespec ts;
502
503 ts.tv_sec = (time_t)delay;
504 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
505
506 nanosleep (&ts, 0);
507#elif defined(_WIN32)
508 Sleep ((unsigned long)(delay * 1e3));
509#else
510 struct timeval tv;
511
512 tv.tv_sec = (time_t)delay;
513 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
514
515 select (0, 0, 0, 0, &tv);
516#endif
517 }
518}
519
520/*****************************************************************************/
521
522int inline_size
523array_nextsize (int elem, int cur, int cnt)
524{
525 int ncur = cur + 1;
526
527 do
528 ncur <<= 1;
529 while (cnt > ncur);
530
531 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
532 if (elem * ncur > 4096)
533 {
534 ncur *= elem;
535 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
536 ncur = ncur - sizeof (void *) * 4;
537 ncur /= elem;
538 }
539
540 return ncur;
541}
542
543static noinline void *
544array_realloc (int elem, void *base, int *cur, int cnt)
545{
546 *cur = array_nextsize (elem, *cur, cnt);
547 return ev_realloc (base, elem * *cur);
548}
283 549
284#define array_needsize(type,base,cur,cnt,init) \ 550#define array_needsize(type,base,cur,cnt,init) \
285 if (expect_false ((cnt) > cur)) \ 551 if (expect_false ((cnt) > (cur))) \
286 { \ 552 { \
287 int newcnt = cur; \ 553 int ocur_ = (cur); \
288 do \ 554 (base) = (type *)array_realloc \
289 { \ 555 (sizeof (type), (base), &(cur), (cnt)); \
290 newcnt = array_roundsize (type, newcnt << 1); \ 556 init ((base) + (ocur_), (cur) - ocur_); \
291 } \
292 while ((cnt) > newcnt); \
293 \
294 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
295 init (base + cur, newcnt - cur); \
296 cur = newcnt; \
297 } 557 }
298 558
559#if 0
299#define array_slim(type,stem) \ 560#define array_slim(type,stem) \
300 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 561 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
301 { \ 562 { \
302 stem ## max = array_roundsize (stem ## cnt >> 1); \ 563 stem ## max = array_roundsize (stem ## cnt >> 1); \
303 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 564 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
304 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 565 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
305 } 566 }
306 567#endif
307/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
308/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
309#define array_free_microshit(stem) \
310 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
311 568
312#define array_free(stem, idx) \ 569#define array_free(stem, idx) \
313 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 570 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
314 571
315/*****************************************************************************/ 572/*****************************************************************************/
316 573
317static void 574void noinline
575ev_feed_event (EV_P_ void *w, int revents)
576{
577 W w_ = (W)w;
578 int pri = ABSPRI (w_);
579
580 if (expect_false (w_->pending))
581 pendings [pri][w_->pending - 1].events |= revents;
582 else
583 {
584 w_->pending = ++pendingcnt [pri];
585 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
586 pendings [pri][w_->pending - 1].w = w_;
587 pendings [pri][w_->pending - 1].events = revents;
588 }
589}
590
591void inline_speed
592queue_events (EV_P_ W *events, int eventcnt, int type)
593{
594 int i;
595
596 for (i = 0; i < eventcnt; ++i)
597 ev_feed_event (EV_A_ events [i], type);
598}
599
600/*****************************************************************************/
601
602void inline_size
318anfds_init (ANFD *base, int count) 603anfds_init (ANFD *base, int count)
319{ 604{
320 while (count--) 605 while (count--)
321 { 606 {
322 base->head = 0; 607 base->head = 0;
… …
325 610
326 ++base; 611 ++base;
327 } 612 }
328} 613}
329 614
330void 615void inline_speed
331ev_feed_event (EV_P_ void *w, int revents)
332{
333 W w_ = (W)w;
334
335 if (w_->pending)
336 {
337 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
338 return;
339 }
340
341 w_->pending = ++pendingcnt [ABSPRI (w_)];
342 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
343 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
344 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
345}
346
347static void
348queue_events (EV_P_ W *events, int eventcnt, int type)
349{
350 int i;
351
352 for (i = 0; i < eventcnt; ++i)
353 ev_feed_event (EV_A_ events [i], type);
354}
355
356inline void
357fd_event (EV_P_ int fd, int revents) 616fd_event (EV_P_ int fd, int revents)
358{ 617{
359 ANFD *anfd = anfds + fd; 618 ANFD *anfd = anfds + fd;
360 struct ev_io *w; 619 ev_io *w;
361 620
362 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 621 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
363 { 622 {
364 int ev = w->events & revents; 623 int ev = w->events & revents;
365 624
366 if (ev) 625 if (ev)
367 ev_feed_event (EV_A_ (W)w, ev); 626 ev_feed_event (EV_A_ (W)w, ev);
… …
369} 628}
370 629
371void 630void
372ev_feed_fd_event (EV_P_ int fd, int revents) 631ev_feed_fd_event (EV_P_ int fd, int revents)
373{ 632{
633 if (fd >= 0 && fd < anfdmax)
374 fd_event (EV_A_ fd, revents); 634 fd_event (EV_A_ fd, revents);
375} 635}
376 636
377/*****************************************************************************/ 637void inline_size
378
379static void
380fd_reify (EV_P) 638fd_reify (EV_P)
381{ 639{
382 int i; 640 int i;
383 641
384 for (i = 0; i < fdchangecnt; ++i) 642 for (i = 0; i < fdchangecnt; ++i)
385 { 643 {
386 int fd = fdchanges [i]; 644 int fd = fdchanges [i];
387 ANFD *anfd = anfds + fd; 645 ANFD *anfd = anfds + fd;
388 struct ev_io *w; 646 ev_io *w;
389 647
390 int events = 0; 648 unsigned char events = 0;
391 649
392 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 650 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
393 events |= w->events; 651 events |= (unsigned char)w->events;
394 652
653#if EV_SELECT_IS_WINSOCKET
654 if (events)
655 {
656 unsigned long argp;
657 #ifdef EV_FD_TO_WIN32_HANDLE
658 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
659 #else
660 anfd->handle = _get_osfhandle (fd);
661 #endif
662 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
663 }
664#endif
665
666 {
667 unsigned char o_events = anfd->events;
668 unsigned char o_reify = anfd->reify;
669
395 anfd->reify = 0; 670 anfd->reify = 0;
396
397 method_modify (EV_A_ fd, anfd->events, events);
398 anfd->events = events; 671 anfd->events = events;
672
673 if (o_events != events || o_reify & EV_IOFDSET)
674 backend_modify (EV_A_ fd, o_events, events);
675 }
399 } 676 }
400 677
401 fdchangecnt = 0; 678 fdchangecnt = 0;
402} 679}
403 680
404static void 681void inline_size
405fd_change (EV_P_ int fd) 682fd_change (EV_P_ int fd, int flags)
406{ 683{
407 if (anfds [fd].reify) 684 unsigned char reify = anfds [fd].reify;
408 return;
409
410 anfds [fd].reify = 1; 685 anfds [fd].reify |= flags;
411 686
687 if (expect_true (!reify))
688 {
412 ++fdchangecnt; 689 ++fdchangecnt;
413 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); 690 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
414 fdchanges [fdchangecnt - 1] = fd; 691 fdchanges [fdchangecnt - 1] = fd;
692 }
415} 693}
416 694
417static void 695void inline_speed
418fd_kill (EV_P_ int fd) 696fd_kill (EV_P_ int fd)
419{ 697{
420 struct ev_io *w; 698 ev_io *w;
421 699
422 while ((w = (struct ev_io *)anfds [fd].head)) 700 while ((w = (ev_io *)anfds [fd].head))
423 { 701 {
424 ev_io_stop (EV_A_ w); 702 ev_io_stop (EV_A_ w);
425 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 703 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
426 } 704 }
427} 705}
428 706
429static int 707int inline_size
430fd_valid (int fd) 708fd_valid (int fd)
431{ 709{
432#ifdef WIN32 710#ifdef _WIN32
433 return !!win32_get_osfhandle (fd); 711 return _get_osfhandle (fd) != -1;
434#else 712#else
435 return fcntl (fd, F_GETFD) != -1; 713 return fcntl (fd, F_GETFD) != -1;
436#endif 714#endif
437} 715}
438 716
439/* called on EBADF to verify fds */ 717/* called on EBADF to verify fds */
440static void 718static void noinline
441fd_ebadf (EV_P) 719fd_ebadf (EV_P)
442{ 720{
443 int fd; 721 int fd;
444 722
445 for (fd = 0; fd < anfdmax; ++fd) 723 for (fd = 0; fd < anfdmax; ++fd)
… …
447 if (!fd_valid (fd) == -1 && errno == EBADF) 725 if (!fd_valid (fd) == -1 && errno == EBADF)
448 fd_kill (EV_A_ fd); 726 fd_kill (EV_A_ fd);
449} 727}
450 728
451/* called on ENOMEM in select/poll to kill some fds and retry */ 729/* called on ENOMEM in select/poll to kill some fds and retry */
452static void 730static void noinline
453fd_enomem (EV_P) 731fd_enomem (EV_P)
454{ 732{
455 int fd; 733 int fd;
456 734
457 for (fd = anfdmax; fd--; ) 735 for (fd = anfdmax; fd--; )
… …
460 fd_kill (EV_A_ fd); 738 fd_kill (EV_A_ fd);
461 return; 739 return;
462 } 740 }
463} 741}
464 742
465/* usually called after fork if method needs to re-arm all fds from scratch */ 743/* usually called after fork if backend needs to re-arm all fds from scratch */
466static void 744static void noinline
467fd_rearm_all (EV_P) 745fd_rearm_all (EV_P)
468{ 746{
469 int fd; 747 int fd;
470 748
471 /* this should be highly optimised to not do anything but set a flag */
472 for (fd = 0; fd < anfdmax; ++fd) 749 for (fd = 0; fd < anfdmax; ++fd)
473 if (anfds [fd].events) 750 if (anfds [fd].events)
474 { 751 {
475 anfds [fd].events = 0; 752 anfds [fd].events = 0;
476 fd_change (EV_A_ fd); 753 fd_change (EV_A_ fd, EV_IOFDSET | 1);
477 } 754 }
478} 755}
479 756
480/*****************************************************************************/ 757/*****************************************************************************/
481 758
482static void 759void inline_speed
483upheap (WT *heap, int k) 760upheap (WT *heap, int k)
484{ 761{
485 WT w = heap [k]; 762 WT w = heap [k];
486 763
487 while (k && heap [k >> 1]->at > w->at) 764 while (k)
488 { 765 {
766 int p = (k - 1) >> 1;
767
768 if (heap [p]->at <= w->at)
769 break;
770
489 heap [k] = heap [k >> 1]; 771 heap [k] = heap [p];
490 ((W)heap [k])->active = k + 1; 772 ((W)heap [k])->active = k + 1;
491 k >>= 1; 773 k = p;
492 } 774 }
493 775
494 heap [k] = w; 776 heap [k] = w;
495 ((W)heap [k])->active = k + 1; 777 ((W)heap [k])->active = k + 1;
496
497} 778}
498 779
499static void 780void inline_speed
500downheap (WT *heap, int N, int k) 781downheap (WT *heap, int N, int k)
501{ 782{
502 WT w = heap [k]; 783 WT w = heap [k];
503 784
504 while (k < (N >> 1)) 785 for (;;)
505 { 786 {
506 int j = k << 1; 787 int c = (k << 1) + 1;
507 788
508 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 789 if (c >= N)
509 ++j;
510
511 if (w->at <= heap [j]->at)
512 break; 790 break;
513 791
792 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
793 ? 1 : 0;
794
795 if (w->at <= heap [c]->at)
796 break;
797
514 heap [k] = heap [j]; 798 heap [k] = heap [c];
515 ((W)heap [k])->active = k + 1; 799 ((W)heap [k])->active = k + 1;
800
516 k = j; 801 k = c;
517 } 802 }
518 803
519 heap [k] = w; 804 heap [k] = w;
520 ((W)heap [k])->active = k + 1; 805 ((W)heap [k])->active = k + 1;
521} 806}
522 807
808void inline_size
809adjustheap (WT *heap, int N, int k)
810{
811 upheap (heap, k);
812 downheap (heap, N, k);
813}
814
523/*****************************************************************************/ 815/*****************************************************************************/
524 816
525typedef struct 817typedef struct
526{ 818{
527 WL head; 819 WL head;
528 sig_atomic_t volatile gotsig; 820 EV_ATOMIC_T gotsig;
529} ANSIG; 821} ANSIG;
530 822
531static ANSIG *signals; 823static ANSIG *signals;
532static int signalmax; 824static int signalmax;
533 825
534static int sigpipe [2]; 826static EV_ATOMIC_T gotsig;
535static sig_atomic_t volatile gotsig;
536static struct ev_io sigev;
537 827
538static void 828void inline_size
539signals_init (ANSIG *base, int count) 829signals_init (ANSIG *base, int count)
540{ 830{
541 while (count--) 831 while (count--)
542 { 832 {
543 base->head = 0; 833 base->head = 0;
… …
545 835
546 ++base; 836 ++base;
547 } 837 }
548} 838}
549 839
840/*****************************************************************************/
841
842void inline_speed
843fd_intern (int fd)
844{
845#ifdef _WIN32
846 int arg = 1;
847 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
848#else
849 fcntl (fd, F_SETFD, FD_CLOEXEC);
850 fcntl (fd, F_SETFL, O_NONBLOCK);
851#endif
852}
853
854static void noinline
855evpipe_init (EV_P)
856{
857 if (!ev_is_active (&pipeev))
858 {
859#if EV_USE_EVENTFD
860 if ((evfd = eventfd (0, 0)) >= 0)
861 {
862 evpipe [0] = -1;
863 fd_intern (evfd);
864 ev_io_set (&pipeev, evfd, EV_READ);
865 }
866 else
867#endif
868 {
869 while (pipe (evpipe))
870 syserr ("(libev) error creating signal/async pipe");
871
872 fd_intern (evpipe [0]);
873 fd_intern (evpipe [1]);
874 ev_io_set (&pipeev, evpipe [0], EV_READ);
875 }
876
877 ev_io_start (EV_A_ &pipeev);
878 ev_unref (EV_A); /* watcher should not keep loop alive */
879 }
880}
881
882void inline_size
883evpipe_write (EV_P_ EV_ATOMIC_T *flag)
884{
885 if (!*flag)
886 {
887 int old_errno = errno; /* save errno because write might clobber it */
888
889 *flag = 1;
890
891#if EV_USE_EVENTFD
892 if (evfd >= 0)
893 {
894 uint64_t counter = 1;
895 write (evfd, &counter, sizeof (uint64_t));
896 }
897 else
898#endif
899 write (evpipe [1], &old_errno, 1);
900
901 errno = old_errno;
902 }
903}
904
550static void 905static void
906pipecb (EV_P_ ev_io *iow, int revents)
907{
908#if EV_USE_EVENTFD
909 if (evfd >= 0)
910 {
911 uint64_t counter = 1;
912 read (evfd, &counter, sizeof (uint64_t));
913 }
914 else
915#endif
916 {
917 char dummy;
918 read (evpipe [0], &dummy, 1);
919 }
920
921 if (gotsig && ev_is_default_loop (EV_A))
922 {
923 int signum;
924 gotsig = 0;
925
926 for (signum = signalmax; signum--; )
927 if (signals [signum].gotsig)
928 ev_feed_signal_event (EV_A_ signum + 1);
929 }
930
931#if EV_ASYNC_ENABLE
932 if (gotasync)
933 {
934 int i;
935 gotasync = 0;
936
937 for (i = asynccnt; i--; )
938 if (asyncs [i]->sent)
939 {
940 asyncs [i]->sent = 0;
941 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
942 }
943 }
944#endif
945}
946
947/*****************************************************************************/
948
949static void
551sighandler (int signum) 950ev_sighandler (int signum)
552{ 951{
952#if EV_MULTIPLICITY
953 struct ev_loop *loop = &default_loop_struct;
954#endif
955
553#if WIN32 956#if _WIN32
554 signal (signum, sighandler); 957 signal (signum, ev_sighandler);
555#endif 958#endif
556 959
557 signals [signum - 1].gotsig = 1; 960 signals [signum - 1].gotsig = 1;
558 961 evpipe_write (EV_A_ &gotsig);
559 if (!gotsig)
560 {
561 int old_errno = errno;
562 gotsig = 1;
563#ifdef WIN32
564 send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
565#else
566 write (sigpipe [1], &signum, 1);
567#endif
568 errno = old_errno;
569 }
570} 962}
571 963
572void 964void noinline
573ev_feed_signal_event (EV_P_ int signum) 965ev_feed_signal_event (EV_P_ int signum)
574{ 966{
575 WL w; 967 WL w;
576 968
577#if EV_MULTIPLICITY 969#if EV_MULTIPLICITY
578 assert (("feeding signal events is only supported in the default loop", loop == default_loop)); 970 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
579#endif 971#endif
580 972
581 --signum; 973 --signum;
582 974
583 if (signum < 0 || signum >= signalmax) 975 if (signum < 0 || signum >= signalmax)
… …
587 979
588 for (w = signals [signum].head; w; w = w->next) 980 for (w = signals [signum].head; w; w = w->next)
589 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 981 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
590} 982}
591 983
592static void
593sigcb (EV_P_ struct ev_io *iow, int revents)
594{
595 int signum;
596
597#ifdef WIN32
598 recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
599#else
600 read (sigpipe [0], &revents, 1);
601#endif
602 gotsig = 0;
603
604 for (signum = signalmax; signum--; )
605 if (signals [signum].gotsig)
606 ev_feed_signal_event (EV_A_ signum + 1);
607}
608
609static void
610siginit (EV_P)
611{
612#ifndef WIN32
613 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
614 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
615
616 /* rather than sort out wether we really need nb, set it */
617 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
618 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
619#endif
620
621 ev_io_set (&sigev, sigpipe [0], EV_READ);
622 ev_io_start (EV_A_ &sigev);
623 ev_unref (EV_A); /* child watcher should not keep loop alive */
624}
625
626/*****************************************************************************/ 984/*****************************************************************************/
627 985
628static struct ev_child *childs [PID_HASHSIZE]; 986static WL childs [EV_PID_HASHSIZE];
629 987
630#ifndef WIN32 988#ifndef _WIN32
631 989
632static struct ev_signal childev; 990static ev_signal childev;
991
992#ifndef WIFCONTINUED
993# define WIFCONTINUED(status) 0
994#endif
995
996void inline_speed
997child_reap (EV_P_ int chain, int pid, int status)
998{
999 ev_child *w;
1000 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1001
1002 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1003 {
1004 if ((w->pid == pid || !w->pid)
1005 && (!traced || (w->flags & 1)))
1006 {
1007 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1008 w->rpid = pid;
1009 w->rstatus = status;
1010 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1011 }
1012 }
1013}
633 1014
634#ifndef WCONTINUED 1015#ifndef WCONTINUED
635# define WCONTINUED 0 1016# define WCONTINUED 0
636#endif 1017#endif
637 1018
638static void 1019static void
639child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
640{
641 struct ev_child *w;
642
643 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
644 if (w->pid == pid || !w->pid)
645 {
646 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
647 w->rpid = pid;
648 w->rstatus = status;
649 ev_feed_event (EV_A_ (W)w, EV_CHILD);
650 }
651}
652
653static void
654childcb (EV_P_ struct ev_signal *sw, int revents) 1020childcb (EV_P_ ev_signal *sw, int revents)
655{ 1021{
656 int pid, status; 1022 int pid, status;
657 1023
1024 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
658 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1025 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
659 { 1026 if (!WCONTINUED
1027 || errno != EINVAL
1028 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1029 return;
1030
660 /* make sure we are called again until all childs have been reaped */ 1031 /* make sure we are called again until all children have been reaped */
1032 /* we need to do it this way so that the callback gets called before we continue */
661 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1033 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
662 1034
663 child_reap (EV_A_ sw, pid, pid, status); 1035 child_reap (EV_A_ pid, pid, status);
1036 if (EV_PID_HASHSIZE > 1)
664 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1037 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
665 }
666} 1038}
667 1039
668#endif 1040#endif
669 1041
670/*****************************************************************************/ 1042/*****************************************************************************/
671 1043
1044#if EV_USE_PORT
1045# include "ev_port.c"
1046#endif
672#if EV_USE_KQUEUE 1047#if EV_USE_KQUEUE
673# include "ev_kqueue.c" 1048# include "ev_kqueue.c"
674#endif 1049#endif
675#if EV_USE_EPOLL 1050#if EV_USE_EPOLL
676# include "ev_epoll.c" 1051# include "ev_epoll.c"
… …
693{ 1068{
694 return EV_VERSION_MINOR; 1069 return EV_VERSION_MINOR;
695} 1070}
696 1071
697/* return true if we are running with elevated privileges and should ignore env variables */ 1072/* return true if we are running with elevated privileges and should ignore env variables */
698static int 1073int inline_size
699enable_secure (void) 1074enable_secure (void)
700{ 1075{
701#ifdef WIN32 1076#ifdef _WIN32
702 return 0; 1077 return 0;
703#else 1078#else
704 return getuid () != geteuid () 1079 return getuid () != geteuid ()
705 || getgid () != getegid (); 1080 || getgid () != getegid ();
706#endif 1081#endif
707} 1082}
708 1083
709int 1084unsigned int
710ev_method (EV_P) 1085ev_supported_backends (void)
711{ 1086{
712 return method; 1087 unsigned int flags = 0;
713}
714 1088
715static void 1089 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
716loop_init (EV_P_ int methods) 1090 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1091 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1092 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1093 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1094
1095 return flags;
1096}
1097
1098unsigned int
1099ev_recommended_backends (void)
717{ 1100{
718 if (!method) 1101 unsigned int flags = ev_supported_backends ();
1102
1103#ifndef __NetBSD__
1104 /* kqueue is borked on everything but netbsd apparently */
1105 /* it usually doesn't work correctly on anything but sockets and pipes */
1106 flags &= ~EVBACKEND_KQUEUE;
1107#endif
1108#ifdef __APPLE__
1109 // flags &= ~EVBACKEND_KQUEUE; for documentation
1110 flags &= ~EVBACKEND_POLL;
1111#endif
1112
1113 return flags;
1114}
1115
1116unsigned int
1117ev_embeddable_backends (void)
1118{
1119 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1120
1121 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1122 /* please fix it and tell me how to detect the fix */
1123 flags &= ~EVBACKEND_EPOLL;
1124
1125 return flags;
1126}
1127
1128unsigned int
1129ev_backend (EV_P)
1130{
1131 return backend;
1132}
1133
1134unsigned int
1135ev_loop_count (EV_P)
1136{
1137 return loop_count;
1138}
1139
1140void
1141ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1142{
1143 io_blocktime = interval;
1144}
1145
1146void
1147ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1148{
1149 timeout_blocktime = interval;
1150}
1151
1152static void noinline
1153loop_init (EV_P_ unsigned int flags)
1154{
1155 if (!backend)
719 { 1156 {
720#if EV_USE_MONOTONIC 1157#if EV_USE_MONOTONIC
721 { 1158 {
722 struct timespec ts; 1159 struct timespec ts;
723 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1160 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
724 have_monotonic = 1; 1161 have_monotonic = 1;
725 } 1162 }
726#endif 1163#endif
727 1164
728 rt_now = ev_time (); 1165 ev_rt_now = ev_time ();
729 mn_now = get_clock (); 1166 mn_now = get_clock ();
730 now_floor = mn_now; 1167 now_floor = mn_now;
731 rtmn_diff = rt_now - mn_now; 1168 rtmn_diff = ev_rt_now - mn_now;
732 1169
733 if (methods == EVMETHOD_AUTO) 1170 io_blocktime = 0.;
734 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1171 timeout_blocktime = 0.;
1172 backend = 0;
1173 backend_fd = -1;
1174 gotasync = 0;
1175#if EV_USE_INOTIFY
1176 fs_fd = -2;
1177#endif
1178
1179 /* pid check not overridable via env */
1180#ifndef _WIN32
1181 if (flags & EVFLAG_FORKCHECK)
1182 curpid = getpid ();
1183#endif
1184
1185 if (!(flags & EVFLAG_NOENV)
1186 && !enable_secure ()
1187 && getenv ("LIBEV_FLAGS"))
735 methods = atoi (getenv ("LIBEV_METHODS")); 1188 flags = atoi (getenv ("LIBEV_FLAGS"));
736 else
737 methods = EVMETHOD_ANY;
738 1189
739 method = 0; 1190 if (!(flags & 0x0000ffffU))
740#if EV_USE_WIN32 1191 flags |= ev_recommended_backends ();
741 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods); 1192
1193#if EV_USE_PORT
1194 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
742#endif 1195#endif
743#if EV_USE_KQUEUE 1196#if EV_USE_KQUEUE
744 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); 1197 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
745#endif 1198#endif
746#if EV_USE_EPOLL 1199#if EV_USE_EPOLL
747 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); 1200 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
748#endif 1201#endif
749#if EV_USE_POLL 1202#if EV_USE_POLL
750 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 1203 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
751#endif 1204#endif
752#if EV_USE_SELECT 1205#if EV_USE_SELECT
753 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 1206 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
754#endif 1207#endif
755 1208
756 ev_watcher_init (&sigev, sigcb); 1209 ev_init (&pipeev, pipecb);
757 ev_set_priority (&sigev, EV_MAXPRI); 1210 ev_set_priority (&pipeev, EV_MAXPRI);
758 } 1211 }
759} 1212}
760 1213
761void 1214static void noinline
762loop_destroy (EV_P) 1215loop_destroy (EV_P)
763{ 1216{
764 int i; 1217 int i;
765 1218
1219 if (ev_is_active (&pipeev))
1220 {
1221 ev_ref (EV_A); /* signal watcher */
1222 ev_io_stop (EV_A_ &pipeev);
1223
1224#if EV_USE_EVENTFD
1225 if (evfd >= 0)
1226 close (evfd);
1227#endif
1228
1229 if (evpipe [0] >= 0)
1230 {
1231 close (evpipe [0]);
1232 close (evpipe [1]);
1233 }
1234 }
1235
766#if EV_USE_WIN32 1236#if EV_USE_INOTIFY
767 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A); 1237 if (fs_fd >= 0)
1238 close (fs_fd);
1239#endif
1240
1241 if (backend_fd >= 0)
1242 close (backend_fd);
1243
1244#if EV_USE_PORT
1245 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
768#endif 1246#endif
769#if EV_USE_KQUEUE 1247#if EV_USE_KQUEUE
770 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1248 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
771#endif 1249#endif
772#if EV_USE_EPOLL 1250#if EV_USE_EPOLL
773 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1251 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
774#endif 1252#endif
775#if EV_USE_POLL 1253#if EV_USE_POLL
776 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1254 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
777#endif 1255#endif
778#if EV_USE_SELECT 1256#if EV_USE_SELECT
779 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1257 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
780#endif 1258#endif
781 1259
782 for (i = NUMPRI; i--; ) 1260 for (i = NUMPRI; i--; )
1261 {
783 array_free (pending, [i]); 1262 array_free (pending, [i]);
1263#if EV_IDLE_ENABLE
1264 array_free (idle, [i]);
1265#endif
1266 }
1267
1268 ev_free (anfds); anfdmax = 0;
784 1269
785 /* have to use the microsoft-never-gets-it-right macro */ 1270 /* have to use the microsoft-never-gets-it-right macro */
786 array_free_microshit (fdchange); 1271 array_free (fdchange, EMPTY);
787 array_free_microshit (timer); 1272 array_free (timer, EMPTY);
788 array_free_microshit (periodic); 1273#if EV_PERIODIC_ENABLE
789 array_free_microshit (idle); 1274 array_free (periodic, EMPTY);
790 array_free_microshit (prepare); 1275#endif
791 array_free_microshit (check); 1276#if EV_FORK_ENABLE
1277 array_free (fork, EMPTY);
1278#endif
1279 array_free (prepare, EMPTY);
1280 array_free (check, EMPTY);
1281#if EV_ASYNC_ENABLE
1282 array_free (async, EMPTY);
1283#endif
792 1284
793 method = 0; 1285 backend = 0;
794} 1286}
795 1287
796static void 1288void inline_size infy_fork (EV_P);
1289
1290void inline_size
797loop_fork (EV_P) 1291loop_fork (EV_P)
798{ 1292{
1293#if EV_USE_PORT
1294 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1295#endif
1296#if EV_USE_KQUEUE
1297 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1298#endif
799#if EV_USE_EPOLL 1299#if EV_USE_EPOLL
800 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1300 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
801#endif 1301#endif
802#if EV_USE_KQUEUE 1302#if EV_USE_INOTIFY
803 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 1303 infy_fork (EV_A);
804#endif 1304#endif
805 1305
806 if (ev_is_active (&sigev)) 1306 if (ev_is_active (&pipeev))
807 { 1307 {
808 /* default loop */ 1308 /* this "locks" the handlers against writing to the pipe */
1309 /* while we modify the fd vars */
1310 gotsig = 1;
1311#if EV_ASYNC_ENABLE
1312 gotasync = 1;
1313#endif
809 1314
810 ev_ref (EV_A); 1315 ev_ref (EV_A);
811 ev_io_stop (EV_A_ &sigev); 1316 ev_io_stop (EV_A_ &pipeev);
1317
1318#if EV_USE_EVENTFD
1319 if (evfd >= 0)
1320 close (evfd);
1321#endif
1322
1323 if (evpipe [0] >= 0)
1324 {
812 close (sigpipe [0]); 1325 close (evpipe [0]);
813 close (sigpipe [1]); 1326 close (evpipe [1]);
1327 }
814 1328
815 while (pipe (sigpipe))
816 syserr ("(libev) error creating pipe");
817
818 siginit (EV_A); 1329 evpipe_init (EV_A);
1330 /* now iterate over everything, in case we missed something */
1331 pipecb (EV_A_ &pipeev, EV_READ);
819 } 1332 }
820 1333
821 postfork = 0; 1334 postfork = 0;
822} 1335}
823 1336
824#if EV_MULTIPLICITY 1337#if EV_MULTIPLICITY
825struct ev_loop * 1338struct ev_loop *
826ev_loop_new (int methods) 1339ev_loop_new (unsigned int flags)
827{ 1340{
828 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 1341 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
829 1342
830 memset (loop, 0, sizeof (struct ev_loop)); 1343 memset (loop, 0, sizeof (struct ev_loop));
831 1344
832 loop_init (EV_A_ methods); 1345 loop_init (EV_A_ flags);
833 1346
834 if (ev_method (EV_A)) 1347 if (ev_backend (EV_A))
835 return loop; 1348 return loop;
836 1349
837 return 0; 1350 return 0;
838} 1351}
839 1352
… …
845} 1358}
846 1359
847void 1360void
848ev_loop_fork (EV_P) 1361ev_loop_fork (EV_P)
849{ 1362{
850 postfork = 1; 1363 postfork = 1; /* must be in line with ev_default_fork */
851} 1364}
852 1365
853#endif 1366#endif
854 1367
855#if EV_MULTIPLICITY 1368#if EV_MULTIPLICITY
856struct ev_loop * 1369struct ev_loop *
1370ev_default_loop_init (unsigned int flags)
857#else 1371#else
858int 1372int
1373ev_default_loop (unsigned int flags)
859#endif 1374#endif
860ev_default_loop (int methods)
861{ 1375{
862 if (sigpipe [0] == sigpipe [1])
863 if (pipe (sigpipe))
864 return 0;
865
866 if (!default_loop) 1376 if (!ev_default_loop_ptr)
867 { 1377 {
868#if EV_MULTIPLICITY 1378#if EV_MULTIPLICITY
869 struct ev_loop *loop = default_loop = &default_loop_struct; 1379 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
870#else 1380#else
871 default_loop = 1; 1381 ev_default_loop_ptr = 1;
872#endif 1382#endif
873 1383
874 loop_init (EV_A_ methods); 1384 loop_init (EV_A_ flags);
875 1385
876 if (ev_method (EV_A)) 1386 if (ev_backend (EV_A))
877 { 1387 {
878 siginit (EV_A);
879
880#ifndef WIN32 1388#ifndef _WIN32
881 ev_signal_init (&childev, childcb, SIGCHLD); 1389 ev_signal_init (&childev, childcb, SIGCHLD);
882 ev_set_priority (&childev, EV_MAXPRI); 1390 ev_set_priority (&childev, EV_MAXPRI);
883 ev_signal_start (EV_A_ &childev); 1391 ev_signal_start (EV_A_ &childev);
884 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1392 ev_unref (EV_A); /* child watcher should not keep loop alive */
885#endif 1393#endif
886 } 1394 }
887 else 1395 else
888 default_loop = 0; 1396 ev_default_loop_ptr = 0;
889 } 1397 }
890 1398
891 return default_loop; 1399 return ev_default_loop_ptr;
892} 1400}
893 1401
894void 1402void
895ev_default_destroy (void) 1403ev_default_destroy (void)
896{ 1404{
897#if EV_MULTIPLICITY 1405#if EV_MULTIPLICITY
898 struct ev_loop *loop = default_loop; 1406 struct ev_loop *loop = ev_default_loop_ptr;
899#endif 1407#endif
900 1408
901#ifndef WIN32 1409#ifndef _WIN32
902 ev_ref (EV_A); /* child watcher */ 1410 ev_ref (EV_A); /* child watcher */
903 ev_signal_stop (EV_A_ &childev); 1411 ev_signal_stop (EV_A_ &childev);
904#endif 1412#endif
905 1413
906 ev_ref (EV_A); /* signal watcher */
907 ev_io_stop (EV_A_ &sigev);
908
909 close (sigpipe [0]); sigpipe [0] = 0;
910 close (sigpipe [1]); sigpipe [1] = 0;
911
912 loop_destroy (EV_A); 1414 loop_destroy (EV_A);
913} 1415}
914 1416
915void 1417void
916ev_default_fork (void) 1418ev_default_fork (void)
917{ 1419{
918#if EV_MULTIPLICITY 1420#if EV_MULTIPLICITY
919 struct ev_loop *loop = default_loop; 1421 struct ev_loop *loop = ev_default_loop_ptr;
920#endif 1422#endif
921 1423
922 if (method) 1424 if (backend)
923 postfork = 1; 1425 postfork = 1; /* must be in line with ev_loop_fork */
924} 1426}
925 1427
926/*****************************************************************************/ 1428/*****************************************************************************/
927 1429
928static int 1430void
929any_pending (EV_P) 1431ev_invoke (EV_P_ void *w, int revents)
930{ 1432{
931 int pri; 1433 EV_CB_INVOKE ((W)w, revents);
932
933 for (pri = NUMPRI; pri--; )
934 if (pendingcnt [pri])
935 return 1;
936
937 return 0;
938} 1434}
939 1435
940static void 1436void inline_speed
941call_pending (EV_P) 1437call_pending (EV_P)
942{ 1438{
943 int pri; 1439 int pri;
944 1440
945 for (pri = NUMPRI; pri--; ) 1441 for (pri = NUMPRI; pri--; )
946 while (pendingcnt [pri]) 1442 while (pendingcnt [pri])
947 { 1443 {
948 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1444 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
949 1445
950 if (p->w) 1446 if (expect_true (p->w))
951 { 1447 {
1448 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1449
952 p->w->pending = 0; 1450 p->w->pending = 0;
953 EV_CB_INVOKE (p->w, p->events); 1451 EV_CB_INVOKE (p->w, p->events);
954 } 1452 }
955 } 1453 }
956} 1454}
957 1455
958static void 1456void inline_size
959timers_reify (EV_P) 1457timers_reify (EV_P)
960{ 1458{
961 while (timercnt && ((WT)timers [0])->at <= mn_now) 1459 while (timercnt && ((WT)timers [0])->at <= mn_now)
962 { 1460 {
963 struct ev_timer *w = timers [0]; 1461 ev_timer *w = (ev_timer *)timers [0];
964 1462
965 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1463 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
966 1464
967 /* first reschedule or stop timer */ 1465 /* first reschedule or stop timer */
968 if (w->repeat) 1466 if (w->repeat)
969 { 1467 {
970 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1468 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1469
971 ((WT)w)->at = mn_now + w->repeat; 1470 ((WT)w)->at += w->repeat;
1471 if (((WT)w)->at < mn_now)
1472 ((WT)w)->at = mn_now;
1473
972 downheap ((WT *)timers, timercnt, 0); 1474 downheap (timers, timercnt, 0);
973 } 1475 }
974 else 1476 else
975 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1477 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
976 1478
977 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 1479 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
978 } 1480 }
979} 1481}
980 1482
981static void 1483#if EV_PERIODIC_ENABLE
1484void inline_size
982periodics_reify (EV_P) 1485periodics_reify (EV_P)
983{ 1486{
984 while (periodiccnt && ((WT)periodics [0])->at <= rt_now) 1487 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
985 { 1488 {
986 struct ev_periodic *w = periodics [0]; 1489 ev_periodic *w = (ev_periodic *)periodics [0];
987 1490
988 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1491 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
989 1492
990 /* first reschedule or stop timer */ 1493 /* first reschedule or stop timer */
991 if (w->reschedule_cb) 1494 if (w->reschedule_cb)
992 { 1495 {
993 ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001); 1496 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
994
995 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now)); 1497 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
996 downheap ((WT *)periodics, periodiccnt, 0); 1498 downheap (periodics, periodiccnt, 0);
997 } 1499 }
998 else if (w->interval) 1500 else if (w->interval)
999 { 1501 {
1000 ((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; 1502 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1503 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1001 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now)); 1504 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1002 downheap ((WT *)periodics, periodiccnt, 0); 1505 downheap (periodics, periodiccnt, 0);
1003 } 1506 }
1004 else 1507 else
1005 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1508 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1006 1509
1007 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 1510 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1008 } 1511 }
1009} 1512}
1010 1513
1011static void 1514static void noinline
1012periodics_reschedule (EV_P) 1515periodics_reschedule (EV_P)
1013{ 1516{
1014 int i; 1517 int i;
1015 1518
1016 /* adjust periodics after time jump */ 1519 /* adjust periodics after time jump */
1017 for (i = 0; i < periodiccnt; ++i) 1520 for (i = 0; i < periodiccnt; ++i)
1018 { 1521 {
1019 struct ev_periodic *w = periodics [i]; 1522 ev_periodic *w = (ev_periodic *)periodics [i];
1020 1523
1021 if (w->reschedule_cb) 1524 if (w->reschedule_cb)
1022 ((WT)w)->at = w->reschedule_cb (w, rt_now); 1525 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1023 else if (w->interval) 1526 else if (w->interval)
1024 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; 1527 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1025 } 1528 }
1026 1529
1027 /* now rebuild the heap */ 1530 /* now rebuild the heap */
1028 for (i = periodiccnt >> 1; i--; ) 1531 for (i = periodiccnt >> 1; i--; )
1029 downheap ((WT *)periodics, periodiccnt, i); 1532 downheap (periodics, periodiccnt, i);
1030} 1533}
1534#endif
1031 1535
1032inline int 1536#if EV_IDLE_ENABLE
1033time_update_monotonic (EV_P) 1537void inline_size
1538idle_reify (EV_P)
1034{ 1539{
1035 mn_now = get_clock (); 1540 if (expect_false (idleall))
1036
1037 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1038 {
1039 rt_now = rtmn_diff + mn_now;
1040 return 0;
1041 } 1541 {
1042 else 1542 int pri;
1543
1544 for (pri = NUMPRI; pri--; )
1545 {
1546 if (pendingcnt [pri])
1547 break;
1548
1549 if (idlecnt [pri])
1550 {
1551 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1552 break;
1553 }
1554 }
1043 { 1555 }
1044 now_floor = mn_now;
1045 rt_now = ev_time ();
1046 return 1;
1047 }
1048} 1556}
1557#endif
1049 1558
1050static void 1559void inline_speed
1051time_update (EV_P) 1560time_update (EV_P_ ev_tstamp max_block)
1052{ 1561{
1053 int i; 1562 int i;
1054 1563
1055#if EV_USE_MONOTONIC 1564#if EV_USE_MONOTONIC
1056 if (expect_true (have_monotonic)) 1565 if (expect_true (have_monotonic))
1057 { 1566 {
1058 if (time_update_monotonic (EV_A)) 1567 ev_tstamp odiff = rtmn_diff;
1568
1569 mn_now = get_clock ();
1570
1571 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1572 /* interpolate in the meantime */
1573 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1059 { 1574 {
1060 ev_tstamp odiff = rtmn_diff; 1575 ev_rt_now = rtmn_diff + mn_now;
1576 return;
1577 }
1061 1578
1579 now_floor = mn_now;
1580 ev_rt_now = ev_time ();
1581
1062 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1582 /* loop a few times, before making important decisions.
1583 * on the choice of "4": one iteration isn't enough,
1584 * in case we get preempted during the calls to
1585 * ev_time and get_clock. a second call is almost guaranteed
1586 * to succeed in that case, though. and looping a few more times
1587 * doesn't hurt either as we only do this on time-jumps or
1588 * in the unlikely event of having been preempted here.
1589 */
1590 for (i = 4; --i; )
1063 { 1591 {
1064 rtmn_diff = rt_now - mn_now; 1592 rtmn_diff = ev_rt_now - mn_now;
1065 1593
1066 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1594 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
1067 return; /* all is well */ 1595 return; /* all is well */
1068 1596
1069 rt_now = ev_time (); 1597 ev_rt_now = ev_time ();
1070 mn_now = get_clock (); 1598 mn_now = get_clock ();
1071 now_floor = mn_now; 1599 now_floor = mn_now;
1072 } 1600 }
1073 1601
1602# if EV_PERIODIC_ENABLE
1603 periodics_reschedule (EV_A);
1604# endif
1605 /* no timer adjustment, as the monotonic clock doesn't jump */
1606 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1607 }
1608 else
1609#endif
1610 {
1611 ev_rt_now = ev_time ();
1612
1613 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1614 {
1615#if EV_PERIODIC_ENABLE
1074 periodics_reschedule (EV_A); 1616 periodics_reschedule (EV_A);
1075 /* no timer adjustment, as the monotonic clock doesn't jump */ 1617#endif
1076 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */ 1618 /* adjust timers. this is easy, as the offset is the same for all of them */
1619 for (i = 0; i < timercnt; ++i)
1620 ((WT)timers [i])->at += ev_rt_now - mn_now;
1077 } 1621 }
1078 }
1079 else
1080#endif
1081 {
1082 rt_now = ev_time ();
1083 1622
1084 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1085 {
1086 periodics_reschedule (EV_A);
1087
1088 /* adjust timers. this is easy, as the offset is the same for all */
1089 for (i = 0; i < timercnt; ++i)
1090 ((WT)timers [i])->at += rt_now - mn_now;
1091 }
1092
1093 mn_now = rt_now; 1623 mn_now = ev_rt_now;
1094 } 1624 }
1095} 1625}
1096 1626
1097void 1627void
1098ev_ref (EV_P) 1628ev_ref (EV_P)
… …
1109static int loop_done; 1639static int loop_done;
1110 1640
1111void 1641void
1112ev_loop (EV_P_ int flags) 1642ev_loop (EV_P_ int flags)
1113{ 1643{
1114 double block; 1644 loop_done = EVUNLOOP_CANCEL;
1115 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1645
1646 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1116 1647
1117 do 1648 do
1118 { 1649 {
1650#ifndef _WIN32
1651 if (expect_false (curpid)) /* penalise the forking check even more */
1652 if (expect_false (getpid () != curpid))
1653 {
1654 curpid = getpid ();
1655 postfork = 1;
1656 }
1657#endif
1658
1659#if EV_FORK_ENABLE
1660 /* we might have forked, so queue fork handlers */
1661 if (expect_false (postfork))
1662 if (forkcnt)
1663 {
1664 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1665 call_pending (EV_A);
1666 }
1667#endif
1668
1119 /* queue check watchers (and execute them) */ 1669 /* queue prepare watchers (and execute them) */
1120 if (expect_false (preparecnt)) 1670 if (expect_false (preparecnt))
1121 { 1671 {
1122 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1672 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1123 call_pending (EV_A); 1673 call_pending (EV_A);
1124 } 1674 }
1125 1675
1676 if (expect_false (!activecnt))
1677 break;
1678
1126 /* we might have forked, so reify kernel state if necessary */ 1679 /* we might have forked, so reify kernel state if necessary */
1127 if (expect_false (postfork)) 1680 if (expect_false (postfork))
1128 loop_fork (EV_A); 1681 loop_fork (EV_A);
1129 1682
1130 /* update fd-related kernel structures */ 1683 /* update fd-related kernel structures */
1131 fd_reify (EV_A); 1684 fd_reify (EV_A);
1132 1685
1133 /* calculate blocking time */ 1686 /* calculate blocking time */
1687 {
1688 ev_tstamp waittime = 0.;
1689 ev_tstamp sleeptime = 0.;
1134 1690
1135 /* we only need this for !monotonic clock or timers, but as we basically 1691 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1136 always have timers, we just calculate it always */
1137#if EV_USE_MONOTONIC
1138 if (expect_true (have_monotonic))
1139 time_update_monotonic (EV_A);
1140 else
1141#endif
1142 { 1692 {
1143 rt_now = ev_time (); 1693 /* update time to cancel out callback processing overhead */
1144 mn_now = rt_now; 1694 time_update (EV_A_ 1e100);
1145 }
1146 1695
1147 if (flags & EVLOOP_NONBLOCK || idlecnt)
1148 block = 0.;
1149 else
1150 {
1151 block = MAX_BLOCKTIME; 1696 waittime = MAX_BLOCKTIME;
1152 1697
1153 if (timercnt) 1698 if (timercnt)
1154 { 1699 {
1155 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 1700 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
1156 if (block > to) block = to; 1701 if (waittime > to) waittime = to;
1157 } 1702 }
1158 1703
1704#if EV_PERIODIC_ENABLE
1159 if (periodiccnt) 1705 if (periodiccnt)
1160 { 1706 {
1161 ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge; 1707 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
1162 if (block > to) block = to; 1708 if (waittime > to) waittime = to;
1163 } 1709 }
1710#endif
1164 1711
1165 if (block < 0.) block = 0.; 1712 if (expect_false (waittime < timeout_blocktime))
1713 waittime = timeout_blocktime;
1714
1715 sleeptime = waittime - backend_fudge;
1716
1717 if (expect_true (sleeptime > io_blocktime))
1718 sleeptime = io_blocktime;
1719
1720 if (sleeptime)
1721 {
1722 ev_sleep (sleeptime);
1723 waittime -= sleeptime;
1724 }
1166 } 1725 }
1167 1726
1168 method_poll (EV_A_ block); 1727 ++loop_count;
1728 backend_poll (EV_A_ waittime);
1169 1729
1170 /* update rt_now, do magic */ 1730 /* update ev_rt_now, do magic */
1171 time_update (EV_A); 1731 time_update (EV_A_ waittime + sleeptime);
1732 }
1172 1733
1173 /* queue pending timers and reschedule them */ 1734 /* queue pending timers and reschedule them */
1174 timers_reify (EV_A); /* relative timers called last */ 1735 timers_reify (EV_A); /* relative timers called last */
1736#if EV_PERIODIC_ENABLE
1175 periodics_reify (EV_A); /* absolute timers called first */ 1737 periodics_reify (EV_A); /* absolute timers called first */
1738#endif
1176 1739
1740#if EV_IDLE_ENABLE
1177 /* queue idle watchers unless io or timers are pending */ 1741 /* queue idle watchers unless other events are pending */
1178 if (idlecnt && !any_pending (EV_A)) 1742 idle_reify (EV_A);
1179 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 1743#endif
1180 1744
1181 /* queue check watchers, to be executed first */ 1745 /* queue check watchers, to be executed first */
1182 if (checkcnt) 1746 if (expect_false (checkcnt))
1183 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 1747 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1184 1748
1185 call_pending (EV_A); 1749 call_pending (EV_A);
1186 } 1750 }
1187 while (activecnt && !loop_done); 1751 while (expect_true (
1752 activecnt
1753 && !loop_done
1754 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1755 ));
1188 1756
1189 if (loop_done != 2) 1757 if (loop_done == EVUNLOOP_ONE)
1190 loop_done = 0; 1758 loop_done = EVUNLOOP_CANCEL;
1191} 1759}
1192 1760
1193void 1761void
1194ev_unloop (EV_P_ int how) 1762ev_unloop (EV_P_ int how)
1195{ 1763{
1196 loop_done = how; 1764 loop_done = how;
1197} 1765}
1198 1766
1199/*****************************************************************************/ 1767/*****************************************************************************/
1200 1768
1201inline void 1769void inline_size
1202wlist_add (WL *head, WL elem) 1770wlist_add (WL *head, WL elem)
1203{ 1771{
1204 elem->next = *head; 1772 elem->next = *head;
1205 *head = elem; 1773 *head = elem;
1206} 1774}
1207 1775
1208inline void 1776void inline_size
1209wlist_del (WL *head, WL elem) 1777wlist_del (WL *head, WL elem)
1210{ 1778{
1211 while (*head) 1779 while (*head)
1212 { 1780 {
1213 if (*head == elem) 1781 if (*head == elem)
… …
1218 1786
1219 head = &(*head)->next; 1787 head = &(*head)->next;
1220 } 1788 }
1221} 1789}
1222 1790
1223inline void 1791void inline_speed
1224ev_clear_pending (EV_P_ W w) 1792clear_pending (EV_P_ W w)
1225{ 1793{
1226 if (w->pending) 1794 if (w->pending)
1227 { 1795 {
1228 pendings [ABSPRI (w)][w->pending - 1].w = 0; 1796 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1229 w->pending = 0; 1797 w->pending = 0;
1230 } 1798 }
1231} 1799}
1232 1800
1233inline void 1801int
1802ev_clear_pending (EV_P_ void *w)
1803{
1804 W w_ = (W)w;
1805 int pending = w_->pending;
1806
1807 if (expect_true (pending))
1808 {
1809 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1810 w_->pending = 0;
1811 p->w = 0;
1812 return p->events;
1813 }
1814 else
1815 return 0;
1816}
1817
1818void inline_size
1819pri_adjust (EV_P_ W w)
1820{
1821 int pri = w->priority;
1822 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1823 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1824 w->priority = pri;
1825}
1826
1827void inline_speed
1234ev_start (EV_P_ W w, int active) 1828ev_start (EV_P_ W w, int active)
1235{ 1829{
1236 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 1830 pri_adjust (EV_A_ w);
1237 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1238
1239 w->active = active; 1831 w->active = active;
1240 ev_ref (EV_A); 1832 ev_ref (EV_A);
1241} 1833}
1242 1834
1243inline void 1835void inline_size
1244ev_stop (EV_P_ W w) 1836ev_stop (EV_P_ W w)
1245{ 1837{
1246 ev_unref (EV_A); 1838 ev_unref (EV_A);
1247 w->active = 0; 1839 w->active = 0;
1248} 1840}
1249 1841
1250/*****************************************************************************/ 1842/*****************************************************************************/
1251 1843
1252void 1844void noinline
1253ev_io_start (EV_P_ struct ev_io *w) 1845ev_io_start (EV_P_ ev_io *w)
1254{ 1846{
1255 int fd = w->fd; 1847 int fd = w->fd;
1256 1848
1257 if (ev_is_active (w)) 1849 if (expect_false (ev_is_active (w)))
1258 return; 1850 return;
1259 1851
1260 assert (("ev_io_start called with negative fd", fd >= 0)); 1852 assert (("ev_io_start called with negative fd", fd >= 0));
1261 1853
1262 ev_start (EV_A_ (W)w, 1); 1854 ev_start (EV_A_ (W)w, 1);
1263 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 1855 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1264 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1856 wlist_add (&anfds[fd].head, (WL)w);
1265 1857
1266 fd_change (EV_A_ fd); 1858 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1859 w->events &= ~EV_IOFDSET;
1267} 1860}
1268 1861
1269void 1862void noinline
1270ev_io_stop (EV_P_ struct ev_io *w) 1863ev_io_stop (EV_P_ ev_io *w)
1271{ 1864{
1272 ev_clear_pending (EV_A_ (W)w); 1865 clear_pending (EV_A_ (W)w);
1273 if (!ev_is_active (w)) 1866 if (expect_false (!ev_is_active (w)))
1274 return; 1867 return;
1275 1868
1869 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1870
1276 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1871 wlist_del (&anfds[w->fd].head, (WL)w);
1277 ev_stop (EV_A_ (W)w); 1872 ev_stop (EV_A_ (W)w);
1278 1873
1279 fd_change (EV_A_ w->fd); 1874 fd_change (EV_A_ w->fd, 1);
1280} 1875}
1281 1876
1282void 1877void noinline
1283ev_timer_start (EV_P_ struct ev_timer *w) 1878ev_timer_start (EV_P_ ev_timer *w)
1284{ 1879{
1285 if (ev_is_active (w)) 1880 if (expect_false (ev_is_active (w)))
1286 return; 1881 return;
1287 1882
1288 ((WT)w)->at += mn_now; 1883 ((WT)w)->at += mn_now;
1289 1884
1290 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 1885 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1291 1886
1292 ev_start (EV_A_ (W)w, ++timercnt); 1887 ev_start (EV_A_ (W)w, ++timercnt);
1293 array_needsize (struct ev_timer *, timers, timermax, timercnt, (void)); 1888 array_needsize (WT, timers, timermax, timercnt, EMPTY2);
1294 timers [timercnt - 1] = w; 1889 timers [timercnt - 1] = (WT)w;
1295 upheap ((WT *)timers, timercnt - 1); 1890 upheap (timers, timercnt - 1);
1296 1891
1297 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 1892 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
1298} 1893}
1299 1894
1300void 1895void noinline
1301ev_timer_stop (EV_P_ struct ev_timer *w) 1896ev_timer_stop (EV_P_ ev_timer *w)
1302{ 1897{
1303 ev_clear_pending (EV_A_ (W)w); 1898 clear_pending (EV_A_ (W)w);
1304 if (!ev_is_active (w)) 1899 if (expect_false (!ev_is_active (w)))
1305 return; 1900 return;
1306 1901
1307 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 1902 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
1308 1903
1309 if (((W)w)->active < timercnt--) 1904 {
1905 int active = ((W)w)->active;
1906
1907 if (expect_true (--active < --timercnt))
1310 { 1908 {
1311 timers [((W)w)->active - 1] = timers [timercnt]; 1909 timers [active] = timers [timercnt];
1312 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 1910 adjustheap (timers, timercnt, active);
1313 } 1911 }
1912 }
1314 1913
1315 ((WT)w)->at = w->repeat; 1914 ((WT)w)->at -= mn_now;
1316 1915
1317 ev_stop (EV_A_ (W)w); 1916 ev_stop (EV_A_ (W)w);
1318} 1917}
1319 1918
1320void 1919void noinline
1321ev_timer_again (EV_P_ struct ev_timer *w) 1920ev_timer_again (EV_P_ ev_timer *w)
1322{ 1921{
1323 if (ev_is_active (w)) 1922 if (ev_is_active (w))
1324 { 1923 {
1325 if (w->repeat) 1924 if (w->repeat)
1326 { 1925 {
1327 ((WT)w)->at = mn_now + w->repeat; 1926 ((WT)w)->at = mn_now + w->repeat;
1328 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 1927 adjustheap (timers, timercnt, ((W)w)->active - 1);
1329 } 1928 }
1330 else 1929 else
1331 ev_timer_stop (EV_A_ w); 1930 ev_timer_stop (EV_A_ w);
1332 } 1931 }
1333 else if (w->repeat) 1932 else if (w->repeat)
1933 {
1934 w->at = w->repeat;
1334 ev_timer_start (EV_A_ w); 1935 ev_timer_start (EV_A_ w);
1936 }
1335} 1937}
1336 1938
1337void 1939#if EV_PERIODIC_ENABLE
1940void noinline
1338ev_periodic_start (EV_P_ struct ev_periodic *w) 1941ev_periodic_start (EV_P_ ev_periodic *w)
1339{ 1942{
1340 if (ev_is_active (w)) 1943 if (expect_false (ev_is_active (w)))
1341 return; 1944 return;
1342 1945
1343 if (w->reschedule_cb) 1946 if (w->reschedule_cb)
1344 ((WT)w)->at = w->reschedule_cb (w, rt_now); 1947 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1345 else if (w->interval) 1948 else if (w->interval)
1346 { 1949 {
1347 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 1950 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1348 /* this formula differs from the one in periodic_reify because we do not always round up */ 1951 /* this formula differs from the one in periodic_reify because we do not always round up */
1349 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; 1952 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1350 } 1953 }
1954 else
1955 ((WT)w)->at = w->offset;
1351 1956
1352 ev_start (EV_A_ (W)w, ++periodiccnt); 1957 ev_start (EV_A_ (W)w, ++periodiccnt);
1353 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); 1958 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
1354 periodics [periodiccnt - 1] = w; 1959 periodics [periodiccnt - 1] = (WT)w;
1355 upheap ((WT *)periodics, periodiccnt - 1); 1960 upheap (periodics, periodiccnt - 1);
1356 1961
1357 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 1962 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
1358} 1963}
1359 1964
1360void 1965void noinline
1361ev_periodic_stop (EV_P_ struct ev_periodic *w) 1966ev_periodic_stop (EV_P_ ev_periodic *w)
1362{ 1967{
1363 ev_clear_pending (EV_A_ (W)w); 1968 clear_pending (EV_A_ (W)w);
1364 if (!ev_is_active (w)) 1969 if (expect_false (!ev_is_active (w)))
1365 return; 1970 return;
1366 1971
1367 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 1972 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
1368 1973
1369 if (((W)w)->active < periodiccnt--) 1974 {
1975 int active = ((W)w)->active;
1976
1977 if (expect_true (--active < --periodiccnt))
1370 { 1978 {
1371 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 1979 periodics [active] = periodics [periodiccnt];
1372 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 1980 adjustheap (periodics, periodiccnt, active);
1373 } 1981 }
1982 }
1374 1983
1375 ev_stop (EV_A_ (W)w); 1984 ev_stop (EV_A_ (W)w);
1376} 1985}
1377 1986
1378void 1987void noinline
1379ev_periodic_again (EV_P_ struct ev_periodic *w) 1988ev_periodic_again (EV_P_ ev_periodic *w)
1380{ 1989{
1990 /* TODO: use adjustheap and recalculation */
1381 ev_periodic_stop (EV_A_ w); 1991 ev_periodic_stop (EV_A_ w);
1382 ev_periodic_start (EV_A_ w); 1992 ev_periodic_start (EV_A_ w);
1383} 1993}
1384 1994#endif
1385void
1386ev_idle_start (EV_P_ struct ev_idle *w)
1387{
1388 if (ev_is_active (w))
1389 return;
1390
1391 ev_start (EV_A_ (W)w, ++idlecnt);
1392 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1393 idles [idlecnt - 1] = w;
1394}
1395
1396void
1397ev_idle_stop (EV_P_ struct ev_idle *w)
1398{
1399 ev_clear_pending (EV_A_ (W)w);
1400 if (ev_is_active (w))
1401 return;
1402
1403 idles [((W)w)->active - 1] = idles [--idlecnt];
1404 ev_stop (EV_A_ (W)w);
1405}
1406
1407void
1408ev_prepare_start (EV_P_ struct ev_prepare *w)
1409{
1410 if (ev_is_active (w))
1411 return;
1412
1413 ev_start (EV_A_ (W)w, ++preparecnt);
1414 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1415 prepares [preparecnt - 1] = w;
1416}
1417
1418void
1419ev_prepare_stop (EV_P_ struct ev_prepare *w)
1420{
1421 ev_clear_pending (EV_A_ (W)w);
1422 if (ev_is_active (w))
1423 return;
1424
1425 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1426 ev_stop (EV_A_ (W)w);
1427}
1428
1429void
1430ev_check_start (EV_P_ struct ev_check *w)
1431{
1432 if (ev_is_active (w))
1433 return;
1434
1435 ev_start (EV_A_ (W)w, ++checkcnt);
1436 array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1437 checks [checkcnt - 1] = w;
1438}
1439
1440void
1441ev_check_stop (EV_P_ struct ev_check *w)
1442{
1443 ev_clear_pending (EV_A_ (W)w);
1444 if (ev_is_active (w))
1445 return;
1446
1447 checks [((W)w)->active - 1] = checks [--checkcnt];
1448 ev_stop (EV_A_ (W)w);
1449}
1450 1995
1451#ifndef SA_RESTART 1996#ifndef SA_RESTART
1452# define SA_RESTART 0 1997# define SA_RESTART 0
1453#endif 1998#endif
1454 1999
1455void 2000void noinline
1456ev_signal_start (EV_P_ struct ev_signal *w) 2001ev_signal_start (EV_P_ ev_signal *w)
1457{ 2002{
1458#if EV_MULTIPLICITY 2003#if EV_MULTIPLICITY
1459 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2004 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1460#endif 2005#endif
1461 if (ev_is_active (w)) 2006 if (expect_false (ev_is_active (w)))
1462 return; 2007 return;
1463 2008
1464 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2009 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1465 2010
2011 evpipe_init (EV_A);
2012
2013 {
2014#ifndef _WIN32
2015 sigset_t full, prev;
2016 sigfillset (&full);
2017 sigprocmask (SIG_SETMASK, &full, &prev);
2018#endif
2019
2020 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2021
2022#ifndef _WIN32
2023 sigprocmask (SIG_SETMASK, &prev, 0);
2024#endif
2025 }
2026
1466 ev_start (EV_A_ (W)w, 1); 2027 ev_start (EV_A_ (W)w, 1);
1467 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1468 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2028 wlist_add (&signals [w->signum - 1].head, (WL)w);
1469 2029
1470 if (!((WL)w)->next) 2030 if (!((WL)w)->next)
1471 { 2031 {
1472#if WIN32 2032#if _WIN32
1473 signal (w->signum, sighandler); 2033 signal (w->signum, ev_sighandler);
1474#else 2034#else
1475 struct sigaction sa; 2035 struct sigaction sa;
1476 sa.sa_handler = sighandler; 2036 sa.sa_handler = ev_sighandler;
1477 sigfillset (&sa.sa_mask); 2037 sigfillset (&sa.sa_mask);
1478 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2038 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1479 sigaction (w->signum, &sa, 0); 2039 sigaction (w->signum, &sa, 0);
1480#endif 2040#endif
1481 } 2041 }
1482} 2042}
1483 2043
1484void 2044void noinline
1485ev_signal_stop (EV_P_ struct ev_signal *w) 2045ev_signal_stop (EV_P_ ev_signal *w)
1486{ 2046{
1487 ev_clear_pending (EV_A_ (W)w); 2047 clear_pending (EV_A_ (W)w);
1488 if (!ev_is_active (w)) 2048 if (expect_false (!ev_is_active (w)))
1489 return; 2049 return;
1490 2050
1491 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2051 wlist_del (&signals [w->signum - 1].head, (WL)w);
1492 ev_stop (EV_A_ (W)w); 2052 ev_stop (EV_A_ (W)w);
1493 2053
1494 if (!signals [w->signum - 1].head) 2054 if (!signals [w->signum - 1].head)
1495 signal (w->signum, SIG_DFL); 2055 signal (w->signum, SIG_DFL);
1496} 2056}
1497 2057
1498void 2058void
1499ev_child_start (EV_P_ struct ev_child *w) 2059ev_child_start (EV_P_ ev_child *w)
1500{ 2060{
1501#if EV_MULTIPLICITY 2061#if EV_MULTIPLICITY
1502 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2062 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1503#endif 2063#endif
1504 if (ev_is_active (w)) 2064 if (expect_false (ev_is_active (w)))
1505 return; 2065 return;
1506 2066
1507 ev_start (EV_A_ (W)w, 1); 2067 ev_start (EV_A_ (W)w, 1);
1508 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2068 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1509} 2069}
1510 2070
1511void 2071void
1512ev_child_stop (EV_P_ struct ev_child *w) 2072ev_child_stop (EV_P_ ev_child *w)
1513{ 2073{
1514 ev_clear_pending (EV_A_ (W)w); 2074 clear_pending (EV_A_ (W)w);
1515 if (ev_is_active (w)) 2075 if (expect_false (!ev_is_active (w)))
1516 return; 2076 return;
1517 2077
1518 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2078 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1519 ev_stop (EV_A_ (W)w); 2079 ev_stop (EV_A_ (W)w);
1520} 2080}
1521 2081
2082#if EV_STAT_ENABLE
2083
2084# ifdef _WIN32
2085# undef lstat
2086# define lstat(a,b) _stati64 (a,b)
2087# endif
2088
2089#define DEF_STAT_INTERVAL 5.0074891
2090#define MIN_STAT_INTERVAL 0.1074891
2091
2092static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2093
2094#if EV_USE_INOTIFY
2095# define EV_INOTIFY_BUFSIZE 8192
2096
2097static void noinline
2098infy_add (EV_P_ ev_stat *w)
2099{
2100 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);
2101
2102 if (w->wd < 0)
2103 {
2104 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2105
2106 /* monitor some parent directory for speedup hints */
2107 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2108 {
2109 char path [4096];
2110 strcpy (path, w->path);
2111
2112 do
2113 {
2114 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2115 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2116
2117 char *pend = strrchr (path, '/');
2118
2119 if (!pend)
2120 break; /* whoops, no '/', complain to your admin */
2121
2122 *pend = 0;
2123 w->wd = inotify_add_watch (fs_fd, path, mask);
2124 }
2125 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2126 }
2127 }
2128 else
2129 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2130
2131 if (w->wd >= 0)
2132 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2133}
2134
2135static void noinline
2136infy_del (EV_P_ ev_stat *w)
2137{
2138 int slot;
2139 int wd = w->wd;
2140
2141 if (wd < 0)
2142 return;
2143
2144 w->wd = -2;
2145 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2146 wlist_del (&fs_hash [slot].head, (WL)w);
2147
2148 /* remove this watcher, if others are watching it, they will rearm */
2149 inotify_rm_watch (fs_fd, wd);
2150}
2151
2152static void noinline
2153infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2154{
2155 if (slot < 0)
2156 /* overflow, need to check for all hahs slots */
2157 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2158 infy_wd (EV_A_ slot, wd, ev);
2159 else
2160 {
2161 WL w_;
2162
2163 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2164 {
2165 ev_stat *w = (ev_stat *)w_;
2166 w_ = w_->next; /* lets us remove this watcher and all before it */
2167
2168 if (w->wd == wd || wd == -1)
2169 {
2170 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2171 {
2172 w->wd = -1;
2173 infy_add (EV_A_ w); /* re-add, no matter what */
2174 }
2175
2176 stat_timer_cb (EV_A_ &w->timer, 0);
2177 }
2178 }
2179 }
2180}
2181
2182static void
2183infy_cb (EV_P_ ev_io *w, int revents)
2184{
2185 char buf [EV_INOTIFY_BUFSIZE];
2186 struct inotify_event *ev = (struct inotify_event *)buf;
2187 int ofs;
2188 int len = read (fs_fd, buf, sizeof (buf));
2189
2190 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2191 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2192}
2193
2194void inline_size
2195infy_init (EV_P)
2196{
2197 if (fs_fd != -2)
2198 return;
2199
2200 fs_fd = inotify_init ();
2201
2202 if (fs_fd >= 0)
2203 {
2204 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2205 ev_set_priority (&fs_w, EV_MAXPRI);
2206 ev_io_start (EV_A_ &fs_w);
2207 }
2208}
2209
2210void inline_size
2211infy_fork (EV_P)
2212{
2213 int slot;
2214
2215 if (fs_fd < 0)
2216 return;
2217
2218 close (fs_fd);
2219 fs_fd = inotify_init ();
2220
2221 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2222 {
2223 WL w_ = fs_hash [slot].head;
2224 fs_hash [slot].head = 0;
2225
2226 while (w_)
2227 {
2228 ev_stat *w = (ev_stat *)w_;
2229 w_ = w_->next; /* lets us add this watcher */
2230
2231 w->wd = -1;
2232
2233 if (fs_fd >= 0)
2234 infy_add (EV_A_ w); /* re-add, no matter what */
2235 else
2236 ev_timer_start (EV_A_ &w->timer);
2237 }
2238
2239 }
2240}
2241
2242#endif
2243
2244void
2245ev_stat_stat (EV_P_ ev_stat *w)
2246{
2247 if (lstat (w->path, &w->attr) < 0)
2248 w->attr.st_nlink = 0;
2249 else if (!w->attr.st_nlink)
2250 w->attr.st_nlink = 1;
2251}
2252
2253static void noinline
2254stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2255{
2256 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2257
2258 /* we copy this here each the time so that */
2259 /* prev has the old value when the callback gets invoked */
2260 w->prev = w->attr;
2261 ev_stat_stat (EV_A_ w);
2262
2263 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2264 if (
2265 w->prev.st_dev != w->attr.st_dev
2266 || w->prev.st_ino != w->attr.st_ino
2267 || w->prev.st_mode != w->attr.st_mode
2268 || w->prev.st_nlink != w->attr.st_nlink
2269 || w->prev.st_uid != w->attr.st_uid
2270 || w->prev.st_gid != w->attr.st_gid
2271 || w->prev.st_rdev != w->attr.st_rdev
2272 || w->prev.st_size != w->attr.st_size
2273 || w->prev.st_atime != w->attr.st_atime
2274 || w->prev.st_mtime != w->attr.st_mtime
2275 || w->prev.st_ctime != w->attr.st_ctime
2276 ) {
2277 #if EV_USE_INOTIFY
2278 infy_del (EV_A_ w);
2279 infy_add (EV_A_ w);
2280 ev_stat_stat (EV_A_ w); /* avoid race... */
2281 #endif
2282
2283 ev_feed_event (EV_A_ w, EV_STAT);
2284 }
2285}
2286
2287void
2288ev_stat_start (EV_P_ ev_stat *w)
2289{
2290 if (expect_false (ev_is_active (w)))
2291 return;
2292
2293 /* since we use memcmp, we need to clear any padding data etc. */
2294 memset (&w->prev, 0, sizeof (ev_statdata));
2295 memset (&w->attr, 0, sizeof (ev_statdata));
2296
2297 ev_stat_stat (EV_A_ w);
2298
2299 if (w->interval < MIN_STAT_INTERVAL)
2300 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2301
2302 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2303 ev_set_priority (&w->timer, ev_priority (w));
2304
2305#if EV_USE_INOTIFY
2306 infy_init (EV_A);
2307
2308 if (fs_fd >= 0)
2309 infy_add (EV_A_ w);
2310 else
2311#endif
2312 ev_timer_start (EV_A_ &w->timer);
2313
2314 ev_start (EV_A_ (W)w, 1);
2315}
2316
2317void
2318ev_stat_stop (EV_P_ ev_stat *w)
2319{
2320 clear_pending (EV_A_ (W)w);
2321 if (expect_false (!ev_is_active (w)))
2322 return;
2323
2324#if EV_USE_INOTIFY
2325 infy_del (EV_A_ w);
2326#endif
2327 ev_timer_stop (EV_A_ &w->timer);
2328
2329 ev_stop (EV_A_ (W)w);
2330}
2331#endif
2332
2333#if EV_IDLE_ENABLE
2334void
2335ev_idle_start (EV_P_ ev_idle *w)
2336{
2337 if (expect_false (ev_is_active (w)))
2338 return;
2339
2340 pri_adjust (EV_A_ (W)w);
2341
2342 {
2343 int active = ++idlecnt [ABSPRI (w)];
2344
2345 ++idleall;
2346 ev_start (EV_A_ (W)w, active);
2347
2348 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2349 idles [ABSPRI (w)][active - 1] = w;
2350 }
2351}
2352
2353void
2354ev_idle_stop (EV_P_ ev_idle *w)
2355{
2356 clear_pending (EV_A_ (W)w);
2357 if (expect_false (!ev_is_active (w)))
2358 return;
2359
2360 {
2361 int active = ((W)w)->active;
2362
2363 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2364 ((W)idles [ABSPRI (w)][active - 1])->active = active;
2365
2366 ev_stop (EV_A_ (W)w);
2367 --idleall;
2368 }
2369}
2370#endif
2371
2372void
2373ev_prepare_start (EV_P_ ev_prepare *w)
2374{
2375 if (expect_false (ev_is_active (w)))
2376 return;
2377
2378 ev_start (EV_A_ (W)w, ++preparecnt);
2379 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2380 prepares [preparecnt - 1] = w;
2381}
2382
2383void
2384ev_prepare_stop (EV_P_ ev_prepare *w)
2385{
2386 clear_pending (EV_A_ (W)w);
2387 if (expect_false (!ev_is_active (w)))
2388 return;
2389
2390 {
2391 int active = ((W)w)->active;
2392 prepares [active - 1] = prepares [--preparecnt];
2393 ((W)prepares [active - 1])->active = active;
2394 }
2395
2396 ev_stop (EV_A_ (W)w);
2397}
2398
2399void
2400ev_check_start (EV_P_ ev_check *w)
2401{
2402 if (expect_false (ev_is_active (w)))
2403 return;
2404
2405 ev_start (EV_A_ (W)w, ++checkcnt);
2406 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2407 checks [checkcnt - 1] = w;
2408}
2409
2410void
2411ev_check_stop (EV_P_ ev_check *w)
2412{
2413 clear_pending (EV_A_ (W)w);
2414 if (expect_false (!ev_is_active (w)))
2415 return;
2416
2417 {
2418 int active = ((W)w)->active;
2419 checks [active - 1] = checks [--checkcnt];
2420 ((W)checks [active - 1])->active = active;
2421 }
2422
2423 ev_stop (EV_A_ (W)w);
2424}
2425
2426#if EV_EMBED_ENABLE
2427void noinline
2428ev_embed_sweep (EV_P_ ev_embed *w)
2429{
2430 ev_loop (w->other, EVLOOP_NONBLOCK);
2431}
2432
2433static void
2434embed_io_cb (EV_P_ ev_io *io, int revents)
2435{
2436 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2437
2438 if (ev_cb (w))
2439 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2440 else
2441 ev_loop (w->other, EVLOOP_NONBLOCK);
2442}
2443
2444static void
2445embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2446{
2447 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2448
2449 {
2450 struct ev_loop *loop = w->other;
2451
2452 while (fdchangecnt)
2453 {
2454 fd_reify (EV_A);
2455 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2456 }
2457 }
2458}
2459
2460#if 0
2461static void
2462embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2463{
2464 ev_idle_stop (EV_A_ idle);
2465}
2466#endif
2467
2468void
2469ev_embed_start (EV_P_ ev_embed *w)
2470{
2471 if (expect_false (ev_is_active (w)))
2472 return;
2473
2474 {
2475 struct ev_loop *loop = w->other;
2476 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2477 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2478 }
2479
2480 ev_set_priority (&w->io, ev_priority (w));
2481 ev_io_start (EV_A_ &w->io);
2482
2483 ev_prepare_init (&w->prepare, embed_prepare_cb);
2484 ev_set_priority (&w->prepare, EV_MINPRI);
2485 ev_prepare_start (EV_A_ &w->prepare);
2486
2487 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2488
2489 ev_start (EV_A_ (W)w, 1);
2490}
2491
2492void
2493ev_embed_stop (EV_P_ ev_embed *w)
2494{
2495 clear_pending (EV_A_ (W)w);
2496 if (expect_false (!ev_is_active (w)))
2497 return;
2498
2499 ev_io_stop (EV_A_ &w->io);
2500 ev_prepare_stop (EV_A_ &w->prepare);
2501
2502 ev_stop (EV_A_ (W)w);
2503}
2504#endif
2505
2506#if EV_FORK_ENABLE
2507void
2508ev_fork_start (EV_P_ ev_fork *w)
2509{
2510 if (expect_false (ev_is_active (w)))
2511 return;
2512
2513 ev_start (EV_A_ (W)w, ++forkcnt);
2514 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2515 forks [forkcnt - 1] = w;
2516}
2517
2518void
2519ev_fork_stop (EV_P_ ev_fork *w)
2520{
2521 clear_pending (EV_A_ (W)w);
2522 if (expect_false (!ev_is_active (w)))
2523 return;
2524
2525 {
2526 int active = ((W)w)->active;
2527 forks [active - 1] = forks [--forkcnt];
2528 ((W)forks [active - 1])->active = active;
2529 }
2530
2531 ev_stop (EV_A_ (W)w);
2532}
2533#endif
2534
2535#if EV_ASYNC_ENABLE
2536void
2537ev_async_start (EV_P_ ev_async *w)
2538{
2539 if (expect_false (ev_is_active (w)))
2540 return;
2541
2542 evpipe_init (EV_A);
2543
2544 ev_start (EV_A_ (W)w, ++asynccnt);
2545 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2546 asyncs [asynccnt - 1] = w;
2547}
2548
2549void
2550ev_async_stop (EV_P_ ev_async *w)
2551{
2552 clear_pending (EV_A_ (W)w);
2553 if (expect_false (!ev_is_active (w)))
2554 return;
2555
2556 {
2557 int active = ((W)w)->active;
2558 asyncs [active - 1] = asyncs [--asynccnt];
2559 ((W)asyncs [active - 1])->active = active;
2560 }
2561
2562 ev_stop (EV_A_ (W)w);
2563}
2564
2565void
2566ev_async_send (EV_P_ ev_async *w)
2567{
2568 w->sent = 1;
2569 evpipe_write (EV_A_ &gotasync);
2570}
2571#endif
2572
1522/*****************************************************************************/ 2573/*****************************************************************************/
1523 2574
1524struct ev_once 2575struct ev_once
1525{ 2576{
1526 struct ev_io io; 2577 ev_io io;
1527 struct ev_timer to; 2578 ev_timer to;
1528 void (*cb)(int revents, void *arg); 2579 void (*cb)(int revents, void *arg);
1529 void *arg; 2580 void *arg;
1530}; 2581};
1531 2582
1532static void 2583static void
… …
1541 2592
1542 cb (revents, arg); 2593 cb (revents, arg);
1543} 2594}
1544 2595
1545static void 2596static void
1546once_cb_io (EV_P_ struct ev_io *w, int revents) 2597once_cb_io (EV_P_ ev_io *w, int revents)
1547{ 2598{
1548 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2599 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1549} 2600}
1550 2601
1551static void 2602static void
1552once_cb_to (EV_P_ struct ev_timer *w, int revents) 2603once_cb_to (EV_P_ ev_timer *w, int revents)
1553{ 2604{
1554 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2605 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1555} 2606}
1556 2607
1557void 2608void
1558ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2609ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1559{ 2610{
1560 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 2611 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1561 2612
1562 if (!once) 2613 if (expect_false (!once))
2614 {
1563 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 2615 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1564 else 2616 return;
1565 { 2617 }
2618
1566 once->cb = cb; 2619 once->cb = cb;
1567 once->arg = arg; 2620 once->arg = arg;
1568 2621
1569 ev_watcher_init (&once->io, once_cb_io); 2622 ev_init (&once->io, once_cb_io);
1570 if (fd >= 0) 2623 if (fd >= 0)
1571 { 2624 {
1572 ev_io_set (&once->io, fd, events); 2625 ev_io_set (&once->io, fd, events);
1573 ev_io_start (EV_A_ &once->io); 2626 ev_io_start (EV_A_ &once->io);
1574 } 2627 }
1575 2628
1576 ev_watcher_init (&once->to, once_cb_to); 2629 ev_init (&once->to, once_cb_to);
1577 if (timeout >= 0.) 2630 if (timeout >= 0.)
1578 { 2631 {
1579 ev_timer_set (&once->to, timeout, 0.); 2632 ev_timer_set (&once->to, timeout, 0.);
1580 ev_timer_start (EV_A_ &once->to); 2633 ev_timer_start (EV_A_ &once->to);
1581 }
1582 } 2634 }
1583} 2635}
1584 2636
2637#if EV_MULTIPLICITY
2638 #include "ev_wrap.h"
2639#endif
2640
2641#ifdef __cplusplus
2642}
2643#endif
2644

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