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Comparing libev/ev.c (file contents):
Revision 1.73 by root, Tue Nov 6 16:27:10 2007 UTC vs.
Revision 1.220 by root, Sun Apr 6 09:53:17 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
148#ifdef EV_H
149# include EV_H
150#else
151# include "ev.h"
152#endif
153
71#ifndef WIN32 154#ifndef _WIN32
72# include <unistd.h>
73# include <sys/time.h> 155# include <sys/time.h>
74# include <sys/wait.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
75#endif 163# endif
76/**/ 164#endif
165
166/* this block tries to deduce configuration from header-defined symbols and defaults */
77 167
78#ifndef EV_USE_MONOTONIC 168#ifndef EV_USE_MONOTONIC
79# define EV_USE_MONOTONIC 1 169# 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
80#endif 178#endif
81 179
82#ifndef EV_USE_SELECT 180#ifndef EV_USE_SELECT
83# define EV_USE_SELECT 1 181# define EV_USE_SELECT 1
84#endif 182#endif
85 183
86#ifndef EV_USE_POLL 184#ifndef EV_USE_POLL
87# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ 185# ifdef _WIN32
186# define EV_USE_POLL 0
187# else
188# define EV_USE_POLL 1
189# endif
88#endif 190#endif
89 191
90#ifndef EV_USE_EPOLL 192#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1
195# else
91# define EV_USE_EPOLL 0 196# define EV_USE_EPOLL 0
197# endif
92#endif 198#endif
93 199
94#ifndef EV_USE_KQUEUE 200#ifndef EV_USE_KQUEUE
95# define EV_USE_KQUEUE 0 201# define EV_USE_KQUEUE 0
96#endif 202#endif
97 203
204#ifndef EV_USE_PORT
205# define EV_USE_PORT 0
206#endif
207
98#ifndef EV_USE_WIN32 208#ifndef EV_USE_INOTIFY
99# ifdef WIN32 209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
100# define EV_USE_WIN32 0 /* it does not exist, use select */
101# undef EV_USE_SELECT
102# define EV_USE_SELECT 1 210# define EV_USE_INOTIFY 1
103# else 211# else
104# define EV_USE_WIN32 0 212# define EV_USE_INOTIFY 0
105# endif 213# endif
106#endif 214#endif
107 215
108#ifndef EV_USE_REALTIME 216#ifndef EV_PID_HASHSIZE
109# define EV_USE_REALTIME 1 217# if EV_MINIMAL
218# define EV_PID_HASHSIZE 1
219# else
220# define EV_PID_HASHSIZE 16
110#endif 221# endif
222#endif
111 223
112/**/ 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 */
113 241
114#ifndef CLOCK_MONOTONIC 242#ifndef CLOCK_MONOTONIC
115# undef EV_USE_MONOTONIC 243# undef EV_USE_MONOTONIC
116# define EV_USE_MONOTONIC 0 244# define EV_USE_MONOTONIC 0
117#endif 245#endif
… …
119#ifndef CLOCK_REALTIME 247#ifndef CLOCK_REALTIME
120# undef EV_USE_REALTIME 248# undef EV_USE_REALTIME
121# define EV_USE_REALTIME 0 249# define EV_USE_REALTIME 0
122#endif 250#endif
123 251
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 */
273int eventfd (unsigned int initval, int flags);
274#endif
275
124/**/ 276/**/
125 277
278/*
279 * This is used to avoid floating point rounding problems.
280 * It is added to ev_rt_now when scheduling periodics
281 * to ensure progress, time-wise, even when rounding
282 * errors are against us.
283 * This value is good at least till the year 4000.
284 * Better solutions welcome.
285 */
286#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
287
126#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 288#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) */ 289#define MAX_BLOCKTIME 59.743 /* 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 */ 290/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
130 291
131#include "ev.h"
132
133#if __GNUC__ >= 3 292#if __GNUC__ >= 4
134# define expect(expr,value) __builtin_expect ((expr),(value)) 293# define expect(expr,value) __builtin_expect ((expr),(value))
135# define inline inline 294# define noinline __attribute__ ((noinline))
136#else 295#else
137# define expect(expr,value) (expr) 296# define expect(expr,value) (expr)
138# define inline static 297# define noinline
298# if __STDC_VERSION__ < 199901L
299# define inline
300# endif
139#endif 301#endif
140 302
141#define expect_false(expr) expect ((expr) != 0, 0) 303#define expect_false(expr) expect ((expr) != 0, 0)
142#define expect_true(expr) expect ((expr) != 0, 1) 304#define expect_true(expr) expect ((expr) != 0, 1)
305#define inline_size static inline
306
307#if EV_MINIMAL
308# define inline_speed static noinline
309#else
310# define inline_speed static inline
311#endif
143 312
144#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 313#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
145#define ABSPRI(w) ((w)->priority - EV_MINPRI) 314#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
146 315
316#define EMPTY /* required for microsofts broken pseudo-c compiler */
317#define EMPTY2(a,b) /* used to suppress some warnings */
318
147typedef struct ev_watcher *W; 319typedef ev_watcher *W;
148typedef struct ev_watcher_list *WL; 320typedef ev_watcher_list *WL;
149typedef struct ev_watcher_time *WT; 321typedef ev_watcher_time *WT;
150 322
323#if EV_USE_MONOTONIC
324/* sig_atomic_t is used to avoid per-thread variables or locking but still */
325/* giving it a reasonably high chance of working on typical architetcures */
151static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 326static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
327#endif
152 328
329#ifdef _WIN32
153#include "ev_win32.c" 330# include "ev_win32.c"
331#endif
154 332
155/*****************************************************************************/ 333/*****************************************************************************/
156 334
157static void (*syserr_cb)(const char *msg); 335static void (*syserr_cb)(const char *msg);
158 336
337void
159void ev_set_syserr_cb (void (*cb)(const char *msg)) 338ev_set_syserr_cb (void (*cb)(const char *msg))
160{ 339{
161 syserr_cb = cb; 340 syserr_cb = cb;
162} 341}
163 342
164static void 343static void noinline
165syserr (const char *msg) 344syserr (const char *msg)
166{ 345{
167 if (!msg) 346 if (!msg)
168 msg = "(libev) system error"; 347 msg = "(libev) system error";
169 348
… …
176 } 355 }
177} 356}
178 357
179static void *(*alloc)(void *ptr, long size); 358static void *(*alloc)(void *ptr, long size);
180 359
360void
181void ev_set_allocator (void *(*cb)(void *ptr, long size)) 361ev_set_allocator (void *(*cb)(void *ptr, long size))
182{ 362{
183 alloc = cb; 363 alloc = cb;
184} 364}
185 365
186static void * 366inline_speed void *
187ev_realloc (void *ptr, long size) 367ev_realloc (void *ptr, long size)
188{ 368{
189 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 369 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
190 370
191 if (!ptr && size) 371 if (!ptr && size)
… …
205typedef struct 385typedef struct
206{ 386{
207 WL head; 387 WL head;
208 unsigned char events; 388 unsigned char events;
209 unsigned char reify; 389 unsigned char reify;
390#if EV_SELECT_IS_WINSOCKET
391 SOCKET handle;
392#endif
210} ANFD; 393} ANFD;
211 394
212typedef struct 395typedef struct
213{ 396{
214 W w; 397 W w;
215 int events; 398 int events;
216} ANPENDING; 399} ANPENDING;
217 400
401#if EV_USE_INOTIFY
402typedef struct
403{
404 WL head;
405} ANFS;
406#endif
407
218#if EV_MULTIPLICITY 408#if EV_MULTIPLICITY
219 409
220struct ev_loop 410 struct ev_loop
221{ 411 {
412 ev_tstamp ev_rt_now;
413 #define ev_rt_now ((loop)->ev_rt_now)
222# define VAR(name,decl) decl; 414 #define VAR(name,decl) decl;
223# include "ev_vars.h" 415 #include "ev_vars.h"
224};
225# undef VAR 416 #undef VAR
417 };
226# include "ev_wrap.h" 418 #include "ev_wrap.h"
419
420 static struct ev_loop default_loop_struct;
421 struct ev_loop *ev_default_loop_ptr;
227 422
228#else 423#else
229 424
425 ev_tstamp ev_rt_now;
230# define VAR(name,decl) static decl; 426 #define VAR(name,decl) static decl;
231# include "ev_vars.h" 427 #include "ev_vars.h"
232# undef VAR 428 #undef VAR
429
430 static int ev_default_loop_ptr;
233 431
234#endif 432#endif
235 433
236/*****************************************************************************/ 434/*****************************************************************************/
237 435
238inline ev_tstamp 436ev_tstamp
239ev_time (void) 437ev_time (void)
240{ 438{
241#if EV_USE_REALTIME 439#if EV_USE_REALTIME
242 struct timespec ts; 440 struct timespec ts;
243 clock_gettime (CLOCK_REALTIME, &ts); 441 clock_gettime (CLOCK_REALTIME, &ts);
… …
247 gettimeofday (&tv, 0); 445 gettimeofday (&tv, 0);
248 return tv.tv_sec + tv.tv_usec * 1e-6; 446 return tv.tv_sec + tv.tv_usec * 1e-6;
249#endif 447#endif
250} 448}
251 449
252inline ev_tstamp 450ev_tstamp inline_size
253get_clock (void) 451get_clock (void)
254{ 452{
255#if EV_USE_MONOTONIC 453#if EV_USE_MONOTONIC
256 if (expect_true (have_monotonic)) 454 if (expect_true (have_monotonic))
257 { 455 {
… …
262#endif 460#endif
263 461
264 return ev_time (); 462 return ev_time ();
265} 463}
266 464
465#if EV_MULTIPLICITY
267ev_tstamp 466ev_tstamp
268ev_now (EV_P) 467ev_now (EV_P)
269{ 468{
270 return rt_now; 469 return ev_rt_now;
271} 470}
471#endif
272 472
273#define array_roundsize(base,n) ((n) | 4 & ~3) 473void
474ev_sleep (ev_tstamp delay)
475{
476 if (delay > 0.)
477 {
478#if EV_USE_NANOSLEEP
479 struct timespec ts;
274 480
481 ts.tv_sec = (time_t)delay;
482 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
483
484 nanosleep (&ts, 0);
485#elif defined(_WIN32)
486 Sleep ((unsigned long)(delay * 1e3));
487#else
488 struct timeval tv;
489
490 tv.tv_sec = (time_t)delay;
491 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
492
493 select (0, 0, 0, 0, &tv);
494#endif
495 }
496}
497
498/*****************************************************************************/
499
500int inline_size
501array_nextsize (int elem, int cur, int cnt)
502{
503 int ncur = cur + 1;
504
505 do
506 ncur <<= 1;
507 while (cnt > ncur);
508
509 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
510 if (elem * ncur > 4096)
511 {
512 ncur *= elem;
513 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
514 ncur = ncur - sizeof (void *) * 4;
515 ncur /= elem;
516 }
517
518 return ncur;
519}
520
521static noinline void *
522array_realloc (int elem, void *base, int *cur, int cnt)
523{
524 *cur = array_nextsize (elem, *cur, cnt);
525 return ev_realloc (base, elem * *cur);
526}
527
275#define array_needsize(base,cur,cnt,init) \ 528#define array_needsize(type,base,cur,cnt,init) \
276 if (expect_false ((cnt) > cur)) \ 529 if (expect_false ((cnt) > (cur))) \
277 { \ 530 { \
278 int newcnt = cur; \ 531 int ocur_ = (cur); \
279 do \ 532 (base) = (type *)array_realloc \
280 { \ 533 (sizeof (type), (base), &(cur), (cnt)); \
281 newcnt = array_roundsize (base, newcnt << 1); \ 534 init ((base) + (ocur_), (cur) - ocur_); \
282 } \
283 while ((cnt) > newcnt); \
284 \
285 base = ev_realloc (base, sizeof (*base) * (newcnt)); \
286 init (base + cur, newcnt - cur); \
287 cur = newcnt; \
288 } 535 }
289 536
537#if 0
290#define array_slim(stem) \ 538#define array_slim(type,stem) \
291 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 539 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
292 { \ 540 { \
293 stem ## max = array_roundsize (stem ## cnt >> 1); \ 541 stem ## max = array_roundsize (stem ## cnt >> 1); \
294 base = ev_realloc (base, sizeof (*base) * (stem ## max)); \ 542 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
295 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 543 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
296 } 544 }
297 545#endif
298/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
299/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
300#define array_free_microshit(stem) \
301 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
302 546
303#define array_free(stem, idx) \ 547#define array_free(stem, idx) \
304 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 548 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
305 549
306/*****************************************************************************/ 550/*****************************************************************************/
307 551
308static void 552void noinline
553ev_feed_event (EV_P_ void *w, int revents)
554{
555 W w_ = (W)w;
556 int pri = ABSPRI (w_);
557
558 if (expect_false (w_->pending))
559 pendings [pri][w_->pending - 1].events |= revents;
560 else
561 {
562 w_->pending = ++pendingcnt [pri];
563 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
564 pendings [pri][w_->pending - 1].w = w_;
565 pendings [pri][w_->pending - 1].events = revents;
566 }
567}
568
569void inline_speed
570queue_events (EV_P_ W *events, int eventcnt, int type)
571{
572 int i;
573
574 for (i = 0; i < eventcnt; ++i)
575 ev_feed_event (EV_A_ events [i], type);
576}
577
578/*****************************************************************************/
579
580void inline_size
309anfds_init (ANFD *base, int count) 581anfds_init (ANFD *base, int count)
310{ 582{
311 while (count--) 583 while (count--)
312 { 584 {
313 base->head = 0; 585 base->head = 0;
… …
316 588
317 ++base; 589 ++base;
318 } 590 }
319} 591}
320 592
321static void 593void inline_speed
322event (EV_P_ W w, int events)
323{
324 if (w->pending)
325 {
326 pendings [ABSPRI (w)][w->pending - 1].events |= events;
327 return;
328 }
329
330 w->pending = ++pendingcnt [ABSPRI (w)];
331 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
332 pendings [ABSPRI (w)][w->pending - 1].w = w;
333 pendings [ABSPRI (w)][w->pending - 1].events = events;
334}
335
336static void
337queue_events (EV_P_ W *events, int eventcnt, int type)
338{
339 int i;
340
341 for (i = 0; i < eventcnt; ++i)
342 event (EV_A_ events [i], type);
343}
344
345static void
346fd_event (EV_P_ int fd, int events) 594fd_event (EV_P_ int fd, int revents)
347{ 595{
348 ANFD *anfd = anfds + fd; 596 ANFD *anfd = anfds + fd;
349 struct ev_io *w; 597 ev_io *w;
350 598
351 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 599 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
352 { 600 {
353 int ev = w->events & events; 601 int ev = w->events & revents;
354 602
355 if (ev) 603 if (ev)
356 event (EV_A_ (W)w, ev); 604 ev_feed_event (EV_A_ (W)w, ev);
357 } 605 }
358} 606}
359 607
360/*****************************************************************************/ 608void
609ev_feed_fd_event (EV_P_ int fd, int revents)
610{
611 if (fd >= 0 && fd < anfdmax)
612 fd_event (EV_A_ fd, revents);
613}
361 614
362static void 615void inline_size
363fd_reify (EV_P) 616fd_reify (EV_P)
364{ 617{
365 int i; 618 int i;
366 619
367 for (i = 0; i < fdchangecnt; ++i) 620 for (i = 0; i < fdchangecnt; ++i)
368 { 621 {
369 int fd = fdchanges [i]; 622 int fd = fdchanges [i];
370 ANFD *anfd = anfds + fd; 623 ANFD *anfd = anfds + fd;
371 struct ev_io *w; 624 ev_io *w;
372 625
373 int events = 0; 626 unsigned char events = 0;
374 627
375 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 628 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
376 events |= w->events; 629 events |= (unsigned char)w->events;
377 630
631#if EV_SELECT_IS_WINSOCKET
632 if (events)
633 {
634 unsigned long argp;
635 #ifdef EV_FD_TO_WIN32_HANDLE
636 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
637 #else
638 anfd->handle = _get_osfhandle (fd);
639 #endif
640 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
641 }
642#endif
643
644 {
645 unsigned char o_events = anfd->events;
646 unsigned char o_reify = anfd->reify;
647
378 anfd->reify = 0; 648 anfd->reify = 0;
379
380 method_modify (EV_A_ fd, anfd->events, events);
381 anfd->events = events; 649 anfd->events = events;
650
651 if (o_events != events || o_reify & EV_IOFDSET)
652 backend_modify (EV_A_ fd, o_events, events);
653 }
382 } 654 }
383 655
384 fdchangecnt = 0; 656 fdchangecnt = 0;
385} 657}
386 658
387static void 659void inline_size
388fd_change (EV_P_ int fd) 660fd_change (EV_P_ int fd, int flags)
389{ 661{
390 if (anfds [fd].reify) 662 unsigned char reify = anfds [fd].reify;
391 return;
392
393 anfds [fd].reify = 1; 663 anfds [fd].reify |= flags;
394 664
665 if (expect_true (!reify))
666 {
395 ++fdchangecnt; 667 ++fdchangecnt;
396 array_needsize (fdchanges, fdchangemax, fdchangecnt, (void)); 668 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
397 fdchanges [fdchangecnt - 1] = fd; 669 fdchanges [fdchangecnt - 1] = fd;
670 }
398} 671}
399 672
400static void 673void inline_speed
401fd_kill (EV_P_ int fd) 674fd_kill (EV_P_ int fd)
402{ 675{
403 struct ev_io *w; 676 ev_io *w;
404 677
405 while ((w = (struct ev_io *)anfds [fd].head)) 678 while ((w = (ev_io *)anfds [fd].head))
406 { 679 {
407 ev_io_stop (EV_A_ w); 680 ev_io_stop (EV_A_ w);
408 event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 681 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
409 } 682 }
410} 683}
411 684
412static int 685int inline_size
413fd_valid (int fd) 686fd_valid (int fd)
414{ 687{
415#ifdef WIN32 688#ifdef _WIN32
416 return !!win32_get_osfhandle (fd); 689 return _get_osfhandle (fd) != -1;
417#else 690#else
418 return fcntl (fd, F_GETFD) != -1; 691 return fcntl (fd, F_GETFD) != -1;
419#endif 692#endif
420} 693}
421 694
422/* called on EBADF to verify fds */ 695/* called on EBADF to verify fds */
423static void 696static void noinline
424fd_ebadf (EV_P) 697fd_ebadf (EV_P)
425{ 698{
426 int fd; 699 int fd;
427 700
428 for (fd = 0; fd < anfdmax; ++fd) 701 for (fd = 0; fd < anfdmax; ++fd)
… …
430 if (!fd_valid (fd) == -1 && errno == EBADF) 703 if (!fd_valid (fd) == -1 && errno == EBADF)
431 fd_kill (EV_A_ fd); 704 fd_kill (EV_A_ fd);
432} 705}
433 706
434/* called on ENOMEM in select/poll to kill some fds and retry */ 707/* called on ENOMEM in select/poll to kill some fds and retry */
435static void 708static void noinline
436fd_enomem (EV_P) 709fd_enomem (EV_P)
437{ 710{
438 int fd; 711 int fd;
439 712
440 for (fd = anfdmax; fd--; ) 713 for (fd = anfdmax; fd--; )
… …
443 fd_kill (EV_A_ fd); 716 fd_kill (EV_A_ fd);
444 return; 717 return;
445 } 718 }
446} 719}
447 720
448/* usually called after fork if method needs to re-arm all fds from scratch */ 721/* usually called after fork if backend needs to re-arm all fds from scratch */
449static void 722static void noinline
450fd_rearm_all (EV_P) 723fd_rearm_all (EV_P)
451{ 724{
452 int fd; 725 int fd;
453 726
454 /* this should be highly optimised to not do anything but set a flag */
455 for (fd = 0; fd < anfdmax; ++fd) 727 for (fd = 0; fd < anfdmax; ++fd)
456 if (anfds [fd].events) 728 if (anfds [fd].events)
457 { 729 {
458 anfds [fd].events = 0; 730 anfds [fd].events = 0;
459 fd_change (EV_A_ fd); 731 fd_change (EV_A_ fd, EV_IOFDSET | 1);
460 } 732 }
461} 733}
462 734
463/*****************************************************************************/ 735/*****************************************************************************/
464 736
465static void 737void inline_speed
466upheap (WT *heap, int k) 738upheap (WT *heap, int k)
467{ 739{
468 WT w = heap [k]; 740 WT w = heap [k];
469 741
470 while (k && heap [k >> 1]->at > w->at) 742 while (k)
471 { 743 {
744 int p = (k - 1) >> 1;
745
746 if (heap [p]->at <= w->at)
747 break;
748
472 heap [k] = heap [k >> 1]; 749 heap [k] = heap [p];
473 ((W)heap [k])->active = k + 1; 750 ((W)heap [k])->active = k + 1;
474 k >>= 1; 751 k = p;
475 } 752 }
476 753
477 heap [k] = w; 754 heap [k] = w;
478 ((W)heap [k])->active = k + 1; 755 ((W)heap [k])->active = k + 1;
479
480} 756}
481 757
482static void 758void inline_speed
483downheap (WT *heap, int N, int k) 759downheap (WT *heap, int N, int k)
484{ 760{
485 WT w = heap [k]; 761 WT w = heap [k];
486 762
487 while (k < (N >> 1)) 763 for (;;)
488 { 764 {
489 int j = k << 1; 765 int c = (k << 1) + 1;
490 766
491 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 767 if (c >= N)
492 ++j;
493
494 if (w->at <= heap [j]->at)
495 break; 768 break;
496 769
770 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
771 ? 1 : 0;
772
773 if (w->at <= heap [c]->at)
774 break;
775
497 heap [k] = heap [j]; 776 heap [k] = heap [c];
498 ((W)heap [k])->active = k + 1; 777 ((W)heap [k])->active = k + 1;
778
499 k = j; 779 k = c;
500 } 780 }
501 781
502 heap [k] = w; 782 heap [k] = w;
503 ((W)heap [k])->active = k + 1; 783 ((W)heap [k])->active = k + 1;
504} 784}
505 785
786void inline_size
787adjustheap (WT *heap, int N, int k)
788{
789 upheap (heap, k);
790 downheap (heap, N, k);
791}
792
506/*****************************************************************************/ 793/*****************************************************************************/
507 794
508typedef struct 795typedef struct
509{ 796{
510 WL head; 797 WL head;
511 sig_atomic_t volatile gotsig; 798 EV_ATOMIC_T gotsig;
512} ANSIG; 799} ANSIG;
513 800
514static ANSIG *signals; 801static ANSIG *signals;
515static int signalmax; 802static int signalmax;
516 803
517static int sigpipe [2]; 804static EV_ATOMIC_T gotsig;
518static sig_atomic_t volatile gotsig;
519static struct ev_io sigev;
520 805
521static void 806void inline_size
522signals_init (ANSIG *base, int count) 807signals_init (ANSIG *base, int count)
523{ 808{
524 while (count--) 809 while (count--)
525 { 810 {
526 base->head = 0; 811 base->head = 0;
… …
528 813
529 ++base; 814 ++base;
530 } 815 }
531} 816}
532 817
818/*****************************************************************************/
819
820void inline_speed
821fd_intern (int fd)
822{
823#ifdef _WIN32
824 int arg = 1;
825 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
826#else
827 fcntl (fd, F_SETFD, FD_CLOEXEC);
828 fcntl (fd, F_SETFL, O_NONBLOCK);
829#endif
830}
831
832static void noinline
833evpipe_init (EV_P)
834{
835 if (!ev_is_active (&pipeev))
836 {
837#if EV_USE_EVENTFD
838 if ((evfd = eventfd (0, 0)) >= 0)
839 {
840 evpipe [0] = -1;
841 fd_intern (evfd);
842 ev_io_set (&pipeev, evfd, EV_READ);
843 }
844 else
845#endif
846 {
847 while (pipe (evpipe))
848 syserr ("(libev) error creating signal/async pipe");
849
850 fd_intern (evpipe [0]);
851 fd_intern (evpipe [1]);
852 ev_io_set (&pipeev, evpipe [0], EV_READ);
853 }
854
855 ev_io_start (EV_A_ &pipeev);
856 ev_unref (EV_A); /* watcher should not keep loop alive */
857 }
858}
859
860void inline_size
861evpipe_write (EV_P_ EV_ATOMIC_T *flag)
862{
863 if (!*flag)
864 {
865 int old_errno = errno; /* save errno because write might clobber it */
866
867 *flag = 1;
868
869#if EV_USE_EVENTFD
870 if (evfd >= 0)
871 {
872 uint64_t counter = 1;
873 write (evfd, &counter, sizeof (uint64_t));
874 }
875 else
876#endif
877 write (evpipe [1], &old_errno, 1);
878
879 errno = old_errno;
880 }
881}
882
533static void 883static void
884pipecb (EV_P_ ev_io *iow, int revents)
885{
886#if EV_USE_EVENTFD
887 if (evfd >= 0)
888 {
889 uint64_t counter = 1;
890 read (evfd, &counter, sizeof (uint64_t));
891 }
892 else
893#endif
894 {
895 char dummy;
896 read (evpipe [0], &dummy, 1);
897 }
898
899 if (gotsig && ev_is_default_loop (EV_A))
900 {
901 int signum;
902 gotsig = 0;
903
904 for (signum = signalmax; signum--; )
905 if (signals [signum].gotsig)
906 ev_feed_signal_event (EV_A_ signum + 1);
907 }
908
909#if EV_ASYNC_ENABLE
910 if (gotasync)
911 {
912 int i;
913 gotasync = 0;
914
915 for (i = asynccnt; i--; )
916 if (asyncs [i]->sent)
917 {
918 asyncs [i]->sent = 0;
919 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
920 }
921 }
922#endif
923}
924
925/*****************************************************************************/
926
927static void
534sighandler (int signum) 928ev_sighandler (int signum)
535{ 929{
930#if EV_MULTIPLICITY
931 struct ev_loop *loop = &default_loop_struct;
932#endif
933
536#if WIN32 934#if _WIN32
537 signal (signum, sighandler); 935 signal (signum, ev_sighandler);
538#endif 936#endif
539 937
540 signals [signum - 1].gotsig = 1; 938 signals [signum - 1].gotsig = 1;
541 939 evpipe_write (EV_A_ &gotsig);
542 if (!gotsig)
543 {
544 int old_errno = errno;
545 gotsig = 1;
546 write (sigpipe [1], &signum, 1);
547 errno = old_errno;
548 }
549} 940}
550 941
551static void 942void noinline
552sigcb (EV_P_ struct ev_io *iow, int revents) 943ev_feed_signal_event (EV_P_ int signum)
553{ 944{
554 WL w; 945 WL w;
946
947#if EV_MULTIPLICITY
948 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
949#endif
950
555 int signum; 951 --signum;
556 952
557 read (sigpipe [0], &revents, 1); 953 if (signum < 0 || signum >= signalmax)
558 gotsig = 0; 954 return;
559 955
560 for (signum = signalmax; signum--; )
561 if (signals [signum].gotsig)
562 {
563 signals [signum].gotsig = 0; 956 signals [signum].gotsig = 0;
564 957
565 for (w = signals [signum].head; w; w = w->next) 958 for (w = signals [signum].head; w; w = w->next)
566 event (EV_A_ (W)w, EV_SIGNAL); 959 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
567 }
568}
569
570static void
571siginit (EV_P)
572{
573#ifndef WIN32
574 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
575 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
576
577 /* rather than sort out wether we really need nb, set it */
578 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
579 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
580#endif
581
582 ev_io_set (&sigev, sigpipe [0], EV_READ);
583 ev_io_start (EV_A_ &sigev);
584 ev_unref (EV_A); /* child watcher should not keep loop alive */
585} 960}
586 961
587/*****************************************************************************/ 962/*****************************************************************************/
588 963
589static struct ev_child *childs [PID_HASHSIZE]; 964static WL childs [EV_PID_HASHSIZE];
590 965
591#ifndef WIN32 966#ifndef _WIN32
592 967
593static struct ev_signal childev; 968static ev_signal childev;
969
970#ifndef WIFCONTINUED
971# define WIFCONTINUED(status) 0
972#endif
973
974void inline_speed
975child_reap (EV_P_ int chain, int pid, int status)
976{
977 ev_child *w;
978 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
979
980 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
981 {
982 if ((w->pid == pid || !w->pid)
983 && (!traced || (w->flags & 1)))
984 {
985 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
986 w->rpid = pid;
987 w->rstatus = status;
988 ev_feed_event (EV_A_ (W)w, EV_CHILD);
989 }
990 }
991}
594 992
595#ifndef WCONTINUED 993#ifndef WCONTINUED
596# define WCONTINUED 0 994# define WCONTINUED 0
597#endif 995#endif
598 996
599static void 997static void
600child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
601{
602 struct ev_child *w;
603
604 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
605 if (w->pid == pid || !w->pid)
606 {
607 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
608 w->rpid = pid;
609 w->rstatus = status;
610 event (EV_A_ (W)w, EV_CHILD);
611 }
612}
613
614static void
615childcb (EV_P_ struct ev_signal *sw, int revents) 998childcb (EV_P_ ev_signal *sw, int revents)
616{ 999{
617 int pid, status; 1000 int pid, status;
618 1001
1002 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
619 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1003 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
620 { 1004 if (!WCONTINUED
1005 || errno != EINVAL
1006 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1007 return;
1008
621 /* make sure we are called again until all childs have been reaped */ 1009 /* make sure we are called again until all children have been reaped */
1010 /* we need to do it this way so that the callback gets called before we continue */
622 event (EV_A_ (W)sw, EV_SIGNAL); 1011 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
623 1012
624 child_reap (EV_A_ sw, pid, pid, status); 1013 child_reap (EV_A_ pid, pid, status);
1014 if (EV_PID_HASHSIZE > 1)
625 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1015 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
626 }
627} 1016}
628 1017
629#endif 1018#endif
630 1019
631/*****************************************************************************/ 1020/*****************************************************************************/
632 1021
1022#if EV_USE_PORT
1023# include "ev_port.c"
1024#endif
633#if EV_USE_KQUEUE 1025#if EV_USE_KQUEUE
634# include "ev_kqueue.c" 1026# include "ev_kqueue.c"
635#endif 1027#endif
636#if EV_USE_EPOLL 1028#if EV_USE_EPOLL
637# include "ev_epoll.c" 1029# include "ev_epoll.c"
… …
654{ 1046{
655 return EV_VERSION_MINOR; 1047 return EV_VERSION_MINOR;
656} 1048}
657 1049
658/* return true if we are running with elevated privileges and should ignore env variables */ 1050/* return true if we are running with elevated privileges and should ignore env variables */
659static int 1051int inline_size
660enable_secure (void) 1052enable_secure (void)
661{ 1053{
662#ifdef WIN32 1054#ifdef _WIN32
663 return 0; 1055 return 0;
664#else 1056#else
665 return getuid () != geteuid () 1057 return getuid () != geteuid ()
666 || getgid () != getegid (); 1058 || getgid () != getegid ();
667#endif 1059#endif
668} 1060}
669 1061
670int 1062unsigned int
671ev_method (EV_P) 1063ev_supported_backends (void)
672{ 1064{
673 return method; 1065 unsigned int flags = 0;
674}
675 1066
676static void 1067 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
677loop_init (EV_P_ int methods) 1068 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1069 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1070 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1071 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1072
1073 return flags;
1074}
1075
1076unsigned int
1077ev_recommended_backends (void)
678{ 1078{
679 if (!method) 1079 unsigned int flags = ev_supported_backends ();
1080
1081#ifndef __NetBSD__
1082 /* kqueue is borked on everything but netbsd apparently */
1083 /* it usually doesn't work correctly on anything but sockets and pipes */
1084 flags &= ~EVBACKEND_KQUEUE;
1085#endif
1086#ifdef __APPLE__
1087 // flags &= ~EVBACKEND_KQUEUE; for documentation
1088 flags &= ~EVBACKEND_POLL;
1089#endif
1090
1091 return flags;
1092}
1093
1094unsigned int
1095ev_embeddable_backends (void)
1096{
1097 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1098
1099 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1100 /* please fix it and tell me how to detect the fix */
1101 flags &= ~EVBACKEND_EPOLL;
1102
1103 return flags;
1104}
1105
1106unsigned int
1107ev_backend (EV_P)
1108{
1109 return backend;
1110}
1111
1112unsigned int
1113ev_loop_count (EV_P)
1114{
1115 return loop_count;
1116}
1117
1118void
1119ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1120{
1121 io_blocktime = interval;
1122}
1123
1124void
1125ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1126{
1127 timeout_blocktime = interval;
1128}
1129
1130static void noinline
1131loop_init (EV_P_ unsigned int flags)
1132{
1133 if (!backend)
680 { 1134 {
681#if EV_USE_MONOTONIC 1135#if EV_USE_MONOTONIC
682 { 1136 {
683 struct timespec ts; 1137 struct timespec ts;
684 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1138 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
685 have_monotonic = 1; 1139 have_monotonic = 1;
686 } 1140 }
687#endif 1141#endif
688 1142
689 rt_now = ev_time (); 1143 ev_rt_now = ev_time ();
690 mn_now = get_clock (); 1144 mn_now = get_clock ();
691 now_floor = mn_now; 1145 now_floor = mn_now;
692 rtmn_diff = rt_now - mn_now; 1146 rtmn_diff = ev_rt_now - mn_now;
693 1147
694 if (methods == EVMETHOD_AUTO) 1148 io_blocktime = 0.;
695 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1149 timeout_blocktime = 0.;
1150 backend = 0;
1151 backend_fd = -1;
1152 gotasync = 0;
1153#if EV_USE_INOTIFY
1154 fs_fd = -2;
1155#endif
1156
1157 /* pid check not overridable via env */
1158#ifndef _WIN32
1159 if (flags & EVFLAG_FORKCHECK)
1160 curpid = getpid ();
1161#endif
1162
1163 if (!(flags & EVFLAG_NOENV)
1164 && !enable_secure ()
1165 && getenv ("LIBEV_FLAGS"))
696 methods = atoi (getenv ("LIBEV_METHODS")); 1166 flags = atoi (getenv ("LIBEV_FLAGS"));
697 else
698 methods = EVMETHOD_ANY;
699 1167
700 method = 0; 1168 if (!(flags & 0x0000ffffUL))
701#if EV_USE_WIN32 1169 flags |= ev_recommended_backends ();
702 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods); 1170
1171#if EV_USE_PORT
1172 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
703#endif 1173#endif
704#if EV_USE_KQUEUE 1174#if EV_USE_KQUEUE
705 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); 1175 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
706#endif 1176#endif
707#if EV_USE_EPOLL 1177#if EV_USE_EPOLL
708 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); 1178 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
709#endif 1179#endif
710#if EV_USE_POLL 1180#if EV_USE_POLL
711 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 1181 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
712#endif 1182#endif
713#if EV_USE_SELECT 1183#if EV_USE_SELECT
714 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 1184 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
715#endif 1185#endif
716 1186
717 ev_watcher_init (&sigev, sigcb); 1187 ev_init (&pipeev, pipecb);
718 ev_set_priority (&sigev, EV_MAXPRI); 1188 ev_set_priority (&pipeev, EV_MAXPRI);
719 } 1189 }
720} 1190}
721 1191
722void 1192static void noinline
723loop_destroy (EV_P) 1193loop_destroy (EV_P)
724{ 1194{
725 int i; 1195 int i;
726 1196
1197 if (ev_is_active (&pipeev))
1198 {
1199 ev_ref (EV_A); /* signal watcher */
1200 ev_io_stop (EV_A_ &pipeev);
1201
1202#if EV_USE_EVENTFD
1203 if (evfd >= 0)
1204 close (evfd);
1205#endif
1206
1207 if (evpipe [0] >= 0)
1208 {
1209 close (evpipe [0]);
1210 close (evpipe [1]);
1211 }
1212 }
1213
727#if EV_USE_WIN32 1214#if EV_USE_INOTIFY
728 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A); 1215 if (fs_fd >= 0)
1216 close (fs_fd);
1217#endif
1218
1219 if (backend_fd >= 0)
1220 close (backend_fd);
1221
1222#if EV_USE_PORT
1223 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
729#endif 1224#endif
730#if EV_USE_KQUEUE 1225#if EV_USE_KQUEUE
731 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1226 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
732#endif 1227#endif
733#if EV_USE_EPOLL 1228#if EV_USE_EPOLL
734 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1229 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
735#endif 1230#endif
736#if EV_USE_POLL 1231#if EV_USE_POLL
737 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1232 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
738#endif 1233#endif
739#if EV_USE_SELECT 1234#if EV_USE_SELECT
740 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1235 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
741#endif 1236#endif
742 1237
743 for (i = NUMPRI; i--; ) 1238 for (i = NUMPRI; i--; )
1239 {
744 array_free (pending, [i]); 1240 array_free (pending, [i]);
1241#if EV_IDLE_ENABLE
1242 array_free (idle, [i]);
1243#endif
1244 }
1245
1246 ev_free (anfds); anfdmax = 0;
745 1247
746 /* have to use the microsoft-never-gets-it-right macro */ 1248 /* have to use the microsoft-never-gets-it-right macro */
747 array_free_microshit (fdchange); 1249 array_free (fdchange, EMPTY);
748 array_free_microshit (timer); 1250 array_free (timer, EMPTY);
749 array_free_microshit (periodic); 1251#if EV_PERIODIC_ENABLE
750 array_free_microshit (idle); 1252 array_free (periodic, EMPTY);
751 array_free_microshit (prepare); 1253#endif
752 array_free_microshit (check); 1254#if EV_FORK_ENABLE
1255 array_free (fork, EMPTY);
1256#endif
1257 array_free (prepare, EMPTY);
1258 array_free (check, EMPTY);
1259#if EV_ASYNC_ENABLE
1260 array_free (async, EMPTY);
1261#endif
753 1262
754 method = 0; 1263 backend = 0;
755} 1264}
756 1265
757static void 1266void inline_size infy_fork (EV_P);
1267
1268void inline_size
758loop_fork (EV_P) 1269loop_fork (EV_P)
759{ 1270{
1271#if EV_USE_PORT
1272 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1273#endif
1274#if EV_USE_KQUEUE
1275 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1276#endif
760#if EV_USE_EPOLL 1277#if EV_USE_EPOLL
761 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1278 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
762#endif 1279#endif
763#if EV_USE_KQUEUE 1280#if EV_USE_INOTIFY
764 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 1281 infy_fork (EV_A);
765#endif 1282#endif
766 1283
767 if (ev_is_active (&sigev)) 1284 if (ev_is_active (&pipeev))
768 { 1285 {
769 /* default loop */ 1286 /* this "locks" the handlers against writing to the pipe */
1287 /* while we modify the fd vars */
1288 gotsig = 1;
1289#if EV_ASYNC_ENABLE
1290 gotasync = 1;
1291#endif
770 1292
771 ev_ref (EV_A); 1293 ev_ref (EV_A);
772 ev_io_stop (EV_A_ &sigev); 1294 ev_io_stop (EV_A_ &pipeev);
1295
1296#if EV_USE_EVENTFD
1297 if (evfd >= 0)
1298 close (evfd);
1299#endif
1300
1301 if (evpipe [0] >= 0)
1302 {
773 close (sigpipe [0]); 1303 close (evpipe [0]);
774 close (sigpipe [1]); 1304 close (evpipe [1]);
1305 }
775 1306
776 while (pipe (sigpipe))
777 syserr ("(libev) error creating pipe");
778
779 siginit (EV_A); 1307 evpipe_init (EV_A);
1308 /* now iterate over everything, in case we missed something */
1309 pipecb (EV_A_ &pipeev, EV_READ);
780 } 1310 }
781 1311
782 postfork = 0; 1312 postfork = 0;
783} 1313}
784 1314
785#if EV_MULTIPLICITY 1315#if EV_MULTIPLICITY
786struct ev_loop * 1316struct ev_loop *
787ev_loop_new (int methods) 1317ev_loop_new (unsigned int flags)
788{ 1318{
789 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 1319 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
790 1320
791 memset (loop, 0, sizeof (struct ev_loop)); 1321 memset (loop, 0, sizeof (struct ev_loop));
792 1322
793 loop_init (EV_A_ methods); 1323 loop_init (EV_A_ flags);
794 1324
795 if (ev_method (EV_A)) 1325 if (ev_backend (EV_A))
796 return loop; 1326 return loop;
797 1327
798 return 0; 1328 return 0;
799} 1329}
800 1330
… …
806} 1336}
807 1337
808void 1338void
809ev_loop_fork (EV_P) 1339ev_loop_fork (EV_P)
810{ 1340{
811 postfork = 1; 1341 postfork = 1; /* must be in line with ev_default_fork */
812} 1342}
813 1343
814#endif 1344#endif
815 1345
816#if EV_MULTIPLICITY 1346#if EV_MULTIPLICITY
817struct ev_loop default_loop_struct;
818static struct ev_loop *default_loop;
819
820struct ev_loop * 1347struct ev_loop *
1348ev_default_loop_init (unsigned int flags)
821#else 1349#else
822static int default_loop;
823
824int 1350int
1351ev_default_loop (unsigned int flags)
825#endif 1352#endif
826ev_default_loop (int methods)
827{ 1353{
828 if (sigpipe [0] == sigpipe [1])
829 if (pipe (sigpipe))
830 return 0;
831
832 if (!default_loop) 1354 if (!ev_default_loop_ptr)
833 { 1355 {
834#if EV_MULTIPLICITY 1356#if EV_MULTIPLICITY
835 struct ev_loop *loop = default_loop = &default_loop_struct; 1357 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
836#else 1358#else
837 default_loop = 1; 1359 ev_default_loop_ptr = 1;
838#endif 1360#endif
839 1361
840 loop_init (EV_A_ methods); 1362 loop_init (EV_A_ flags);
841 1363
842 if (ev_method (EV_A)) 1364 if (ev_backend (EV_A))
843 { 1365 {
844 siginit (EV_A);
845
846#ifndef WIN32 1366#ifndef _WIN32
847 ev_signal_init (&childev, childcb, SIGCHLD); 1367 ev_signal_init (&childev, childcb, SIGCHLD);
848 ev_set_priority (&childev, EV_MAXPRI); 1368 ev_set_priority (&childev, EV_MAXPRI);
849 ev_signal_start (EV_A_ &childev); 1369 ev_signal_start (EV_A_ &childev);
850 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1370 ev_unref (EV_A); /* child watcher should not keep loop alive */
851#endif 1371#endif
852 } 1372 }
853 else 1373 else
854 default_loop = 0; 1374 ev_default_loop_ptr = 0;
855 } 1375 }
856 1376
857 return default_loop; 1377 return ev_default_loop_ptr;
858} 1378}
859 1379
860void 1380void
861ev_default_destroy (void) 1381ev_default_destroy (void)
862{ 1382{
863#if EV_MULTIPLICITY 1383#if EV_MULTIPLICITY
864 struct ev_loop *loop = default_loop; 1384 struct ev_loop *loop = ev_default_loop_ptr;
865#endif 1385#endif
866 1386
867#ifndef WIN32 1387#ifndef _WIN32
868 ev_ref (EV_A); /* child watcher */ 1388 ev_ref (EV_A); /* child watcher */
869 ev_signal_stop (EV_A_ &childev); 1389 ev_signal_stop (EV_A_ &childev);
870#endif 1390#endif
871 1391
872 ev_ref (EV_A); /* signal watcher */
873 ev_io_stop (EV_A_ &sigev);
874
875 close (sigpipe [0]); sigpipe [0] = 0;
876 close (sigpipe [1]); sigpipe [1] = 0;
877
878 loop_destroy (EV_A); 1392 loop_destroy (EV_A);
879} 1393}
880 1394
881void 1395void
882ev_default_fork (void) 1396ev_default_fork (void)
883{ 1397{
884#if EV_MULTIPLICITY 1398#if EV_MULTIPLICITY
885 struct ev_loop *loop = default_loop; 1399 struct ev_loop *loop = ev_default_loop_ptr;
886#endif 1400#endif
887 1401
888 if (method) 1402 if (backend)
889 postfork = 1; 1403 postfork = 1; /* must be in line with ev_loop_fork */
890} 1404}
891 1405
892/*****************************************************************************/ 1406/*****************************************************************************/
893 1407
894static void 1408void
1409ev_invoke (EV_P_ void *w, int revents)
1410{
1411 EV_CB_INVOKE ((W)w, revents);
1412}
1413
1414void inline_speed
895call_pending (EV_P) 1415call_pending (EV_P)
896{ 1416{
897 int pri; 1417 int pri;
898 1418
899 for (pri = NUMPRI; pri--; ) 1419 for (pri = NUMPRI; pri--; )
900 while (pendingcnt [pri]) 1420 while (pendingcnt [pri])
901 { 1421 {
902 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1422 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
903 1423
904 if (p->w) 1424 if (expect_true (p->w))
905 { 1425 {
1426 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1427
906 p->w->pending = 0; 1428 p->w->pending = 0;
907 p->w->cb (EV_A_ p->w, p->events); 1429 EV_CB_INVOKE (p->w, p->events);
908 } 1430 }
909 } 1431 }
910} 1432}
911 1433
912static void 1434void inline_size
913timers_reify (EV_P) 1435timers_reify (EV_P)
914{ 1436{
915 while (timercnt && ((WT)timers [0])->at <= mn_now) 1437 while (timercnt && ((WT)timers [0])->at <= mn_now)
916 { 1438 {
917 struct ev_timer *w = timers [0]; 1439 ev_timer *w = (ev_timer *)timers [0];
918 1440
919 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1441 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
920 1442
921 /* first reschedule or stop timer */ 1443 /* first reschedule or stop timer */
922 if (w->repeat) 1444 if (w->repeat)
923 { 1445 {
924 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1446 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1447
925 ((WT)w)->at = mn_now + w->repeat; 1448 ((WT)w)->at += w->repeat;
1449 if (((WT)w)->at < mn_now)
1450 ((WT)w)->at = mn_now;
1451
926 downheap ((WT *)timers, timercnt, 0); 1452 downheap (timers, timercnt, 0);
927 } 1453 }
928 else 1454 else
929 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1455 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
930 1456
931 event (EV_A_ (W)w, EV_TIMEOUT); 1457 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
932 } 1458 }
933} 1459}
934 1460
935static void 1461#if EV_PERIODIC_ENABLE
1462void inline_size
936periodics_reify (EV_P) 1463periodics_reify (EV_P)
937{ 1464{
938 while (periodiccnt && ((WT)periodics [0])->at <= rt_now) 1465 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
939 { 1466 {
940 struct ev_periodic *w = periodics [0]; 1467 ev_periodic *w = (ev_periodic *)periodics [0];
941 1468
942 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1469 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
943 1470
944 /* first reschedule or stop timer */ 1471 /* first reschedule or stop timer */
945 if (w->interval) 1472 if (w->reschedule_cb)
946 { 1473 {
1474 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1475 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1476 downheap (periodics, periodiccnt, 0);
1477 }
1478 else if (w->interval)
1479 {
947 ((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; 1480 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1481 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
948 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now)); 1482 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
949 downheap ((WT *)periodics, periodiccnt, 0); 1483 downheap (periodics, periodiccnt, 0);
950 } 1484 }
951 else 1485 else
952 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1486 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
953 1487
954 event (EV_A_ (W)w, EV_PERIODIC); 1488 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
955 } 1489 }
956} 1490}
957 1491
958static void 1492static void noinline
959periodics_reschedule (EV_P) 1493periodics_reschedule (EV_P)
960{ 1494{
961 int i; 1495 int i;
962 1496
963 /* adjust periodics after time jump */ 1497 /* adjust periodics after time jump */
964 for (i = 0; i < periodiccnt; ++i) 1498 for (i = 0; i < periodiccnt; ++i)
965 { 1499 {
966 struct ev_periodic *w = periodics [i]; 1500 ev_periodic *w = (ev_periodic *)periodics [i];
967 1501
1502 if (w->reschedule_cb)
1503 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
968 if (w->interval) 1504 else if (w->interval)
1505 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1506 }
1507
1508 /* now rebuild the heap */
1509 for (i = periodiccnt >> 1; i--; )
1510 downheap (periodics, periodiccnt, i);
1511}
1512#endif
1513
1514#if EV_IDLE_ENABLE
1515void inline_size
1516idle_reify (EV_P)
1517{
1518 if (expect_false (idleall))
1519 {
1520 int pri;
1521
1522 for (pri = NUMPRI; pri--; )
969 { 1523 {
970 ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; 1524 if (pendingcnt [pri])
1525 break;
971 1526
972 if (fabs (diff) >= 1e-4) 1527 if (idlecnt [pri])
973 { 1528 {
974 ev_periodic_stop (EV_A_ w); 1529 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
975 ev_periodic_start (EV_A_ w); 1530 break;
976
977 i = 0; /* restart loop, inefficient, but time jumps should be rare */
978 } 1531 }
979 } 1532 }
980 } 1533 }
981} 1534}
1535#endif
982 1536
983inline int 1537void inline_speed
984time_update_monotonic (EV_P) 1538time_update (EV_P_ ev_tstamp max_block)
985{
986 mn_now = get_clock ();
987
988 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
989 {
990 rt_now = rtmn_diff + mn_now;
991 return 0;
992 }
993 else
994 {
995 now_floor = mn_now;
996 rt_now = ev_time ();
997 return 1;
998 }
999}
1000
1001static void
1002time_update (EV_P)
1003{ 1539{
1004 int i; 1540 int i;
1005 1541
1006#if EV_USE_MONOTONIC 1542#if EV_USE_MONOTONIC
1007 if (expect_true (have_monotonic)) 1543 if (expect_true (have_monotonic))
1008 { 1544 {
1009 if (time_update_monotonic (EV_A)) 1545 ev_tstamp odiff = rtmn_diff;
1546
1547 mn_now = get_clock ();
1548
1549 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1550 /* interpolate in the meantime */
1551 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1010 { 1552 {
1011 ev_tstamp odiff = rtmn_diff; 1553 ev_rt_now = rtmn_diff + mn_now;
1554 return;
1555 }
1012 1556
1557 now_floor = mn_now;
1558 ev_rt_now = ev_time ();
1559
1013 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1560 /* loop a few times, before making important decisions.
1561 * on the choice of "4": one iteration isn't enough,
1562 * in case we get preempted during the calls to
1563 * ev_time and get_clock. a second call is almost guaranteed
1564 * to succeed in that case, though. and looping a few more times
1565 * doesn't hurt either as we only do this on time-jumps or
1566 * in the unlikely event of having been preempted here.
1567 */
1568 for (i = 4; --i; )
1014 { 1569 {
1015 rtmn_diff = rt_now - mn_now; 1570 rtmn_diff = ev_rt_now - mn_now;
1016 1571
1017 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1572 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
1018 return; /* all is well */ 1573 return; /* all is well */
1019 1574
1020 rt_now = ev_time (); 1575 ev_rt_now = ev_time ();
1021 mn_now = get_clock (); 1576 mn_now = get_clock ();
1022 now_floor = mn_now; 1577 now_floor = mn_now;
1023 } 1578 }
1024 1579
1580# if EV_PERIODIC_ENABLE
1581 periodics_reschedule (EV_A);
1582# endif
1583 /* no timer adjustment, as the monotonic clock doesn't jump */
1584 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1585 }
1586 else
1587#endif
1588 {
1589 ev_rt_now = ev_time ();
1590
1591 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1592 {
1593#if EV_PERIODIC_ENABLE
1025 periodics_reschedule (EV_A); 1594 periodics_reschedule (EV_A);
1026 /* no timer adjustment, as the monotonic clock doesn't jump */ 1595#endif
1027 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */ 1596 /* adjust timers. this is easy, as the offset is the same for all of them */
1597 for (i = 0; i < timercnt; ++i)
1598 ((WT)timers [i])->at += ev_rt_now - mn_now;
1028 } 1599 }
1029 }
1030 else
1031#endif
1032 {
1033 rt_now = ev_time ();
1034 1600
1035 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1036 {
1037 periodics_reschedule (EV_A);
1038
1039 /* adjust timers. this is easy, as the offset is the same for all */
1040 for (i = 0; i < timercnt; ++i)
1041 ((WT)timers [i])->at += rt_now - mn_now;
1042 }
1043
1044 mn_now = rt_now; 1601 mn_now = ev_rt_now;
1045 } 1602 }
1046} 1603}
1047 1604
1048void 1605void
1049ev_ref (EV_P) 1606ev_ref (EV_P)
… …
1060static int loop_done; 1617static int loop_done;
1061 1618
1062void 1619void
1063ev_loop (EV_P_ int flags) 1620ev_loop (EV_P_ int flags)
1064{ 1621{
1065 double block; 1622 loop_done = EVUNLOOP_CANCEL;
1066 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1623
1624 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1067 1625
1068 do 1626 do
1069 { 1627 {
1628#ifndef _WIN32
1629 if (expect_false (curpid)) /* penalise the forking check even more */
1630 if (expect_false (getpid () != curpid))
1631 {
1632 curpid = getpid ();
1633 postfork = 1;
1634 }
1635#endif
1636
1637#if EV_FORK_ENABLE
1638 /* we might have forked, so queue fork handlers */
1639 if (expect_false (postfork))
1640 if (forkcnt)
1641 {
1642 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1643 call_pending (EV_A);
1644 }
1645#endif
1646
1070 /* queue check watchers (and execute them) */ 1647 /* queue prepare watchers (and execute them) */
1071 if (expect_false (preparecnt)) 1648 if (expect_false (preparecnt))
1072 { 1649 {
1073 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1650 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1074 call_pending (EV_A); 1651 call_pending (EV_A);
1075 } 1652 }
1076 1653
1654 if (expect_false (!activecnt))
1655 break;
1656
1077 /* we might have forked, so reify kernel state if necessary */ 1657 /* we might have forked, so reify kernel state if necessary */
1078 if (expect_false (postfork)) 1658 if (expect_false (postfork))
1079 loop_fork (EV_A); 1659 loop_fork (EV_A);
1080 1660
1081 /* update fd-related kernel structures */ 1661 /* update fd-related kernel structures */
1082 fd_reify (EV_A); 1662 fd_reify (EV_A);
1083 1663
1084 /* calculate blocking time */ 1664 /* calculate blocking time */
1665 {
1666 ev_tstamp waittime = 0.;
1667 ev_tstamp sleeptime = 0.;
1085 1668
1086 /* we only need this for !monotonic clockor timers, but as we basically 1669 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1087 always have timers, we just calculate it always */
1088#if EV_USE_MONOTONIC
1089 if (expect_true (have_monotonic))
1090 time_update_monotonic (EV_A);
1091 else
1092#endif
1093 { 1670 {
1094 rt_now = ev_time (); 1671 /* update time to cancel out callback processing overhead */
1095 mn_now = rt_now; 1672 time_update (EV_A_ 1e100);
1096 }
1097 1673
1098 if (flags & EVLOOP_NONBLOCK || idlecnt)
1099 block = 0.;
1100 else
1101 {
1102 block = MAX_BLOCKTIME; 1674 waittime = MAX_BLOCKTIME;
1103 1675
1104 if (timercnt) 1676 if (timercnt)
1105 { 1677 {
1106 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 1678 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
1107 if (block > to) block = to; 1679 if (waittime > to) waittime = to;
1108 } 1680 }
1109 1681
1682#if EV_PERIODIC_ENABLE
1110 if (periodiccnt) 1683 if (periodiccnt)
1111 { 1684 {
1112 ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge; 1685 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
1113 if (block > to) block = to; 1686 if (waittime > to) waittime = to;
1114 } 1687 }
1688#endif
1115 1689
1116 if (block < 0.) block = 0.; 1690 if (expect_false (waittime < timeout_blocktime))
1691 waittime = timeout_blocktime;
1692
1693 sleeptime = waittime - backend_fudge;
1694
1695 if (expect_true (sleeptime > io_blocktime))
1696 sleeptime = io_blocktime;
1697
1698 if (sleeptime)
1699 {
1700 ev_sleep (sleeptime);
1701 waittime -= sleeptime;
1702 }
1117 } 1703 }
1118 1704
1119 method_poll (EV_A_ block); 1705 ++loop_count;
1706 backend_poll (EV_A_ waittime);
1120 1707
1121 /* update rt_now, do magic */ 1708 /* update ev_rt_now, do magic */
1122 time_update (EV_A); 1709 time_update (EV_A_ waittime + sleeptime);
1710 }
1123 1711
1124 /* queue pending timers and reschedule them */ 1712 /* queue pending timers and reschedule them */
1125 timers_reify (EV_A); /* relative timers called last */ 1713 timers_reify (EV_A); /* relative timers called last */
1714#if EV_PERIODIC_ENABLE
1126 periodics_reify (EV_A); /* absolute timers called first */ 1715 periodics_reify (EV_A); /* absolute timers called first */
1716#endif
1127 1717
1718#if EV_IDLE_ENABLE
1128 /* queue idle watchers unless io or timers are pending */ 1719 /* queue idle watchers unless other events are pending */
1129 if (!pendingcnt) 1720 idle_reify (EV_A);
1130 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 1721#endif
1131 1722
1132 /* queue check watchers, to be executed first */ 1723 /* queue check watchers, to be executed first */
1133 if (checkcnt) 1724 if (expect_false (checkcnt))
1134 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 1725 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1135 1726
1136 call_pending (EV_A); 1727 call_pending (EV_A);
1137 } 1728 }
1138 while (activecnt && !loop_done); 1729 while (expect_true (
1730 activecnt
1731 && !loop_done
1732 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1733 ));
1139 1734
1140 if (loop_done != 2) 1735 if (loop_done == EVUNLOOP_ONE)
1141 loop_done = 0; 1736 loop_done = EVUNLOOP_CANCEL;
1142} 1737}
1143 1738
1144void 1739void
1145ev_unloop (EV_P_ int how) 1740ev_unloop (EV_P_ int how)
1146{ 1741{
1147 loop_done = how; 1742 loop_done = how;
1148} 1743}
1149 1744
1150/*****************************************************************************/ 1745/*****************************************************************************/
1151 1746
1152inline void 1747void inline_size
1153wlist_add (WL *head, WL elem) 1748wlist_add (WL *head, WL elem)
1154{ 1749{
1155 elem->next = *head; 1750 elem->next = *head;
1156 *head = elem; 1751 *head = elem;
1157} 1752}
1158 1753
1159inline void 1754void inline_size
1160wlist_del (WL *head, WL elem) 1755wlist_del (WL *head, WL elem)
1161{ 1756{
1162 while (*head) 1757 while (*head)
1163 { 1758 {
1164 if (*head == elem) 1759 if (*head == elem)
… …
1169 1764
1170 head = &(*head)->next; 1765 head = &(*head)->next;
1171 } 1766 }
1172} 1767}
1173 1768
1174inline void 1769void inline_speed
1175ev_clear_pending (EV_P_ W w) 1770clear_pending (EV_P_ W w)
1176{ 1771{
1177 if (w->pending) 1772 if (w->pending)
1178 { 1773 {
1179 pendings [ABSPRI (w)][w->pending - 1].w = 0; 1774 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1180 w->pending = 0; 1775 w->pending = 0;
1181 } 1776 }
1182} 1777}
1183 1778
1184inline void 1779int
1780ev_clear_pending (EV_P_ void *w)
1781{
1782 W w_ = (W)w;
1783 int pending = w_->pending;
1784
1785 if (expect_true (pending))
1786 {
1787 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1788 w_->pending = 0;
1789 p->w = 0;
1790 return p->events;
1791 }
1792 else
1793 return 0;
1794}
1795
1796void inline_size
1797pri_adjust (EV_P_ W w)
1798{
1799 int pri = w->priority;
1800 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1801 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1802 w->priority = pri;
1803}
1804
1805void inline_speed
1185ev_start (EV_P_ W w, int active) 1806ev_start (EV_P_ W w, int active)
1186{ 1807{
1187 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 1808 pri_adjust (EV_A_ w);
1188 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1189
1190 w->active = active; 1809 w->active = active;
1191 ev_ref (EV_A); 1810 ev_ref (EV_A);
1192} 1811}
1193 1812
1194inline void 1813void inline_size
1195ev_stop (EV_P_ W w) 1814ev_stop (EV_P_ W w)
1196{ 1815{
1197 ev_unref (EV_A); 1816 ev_unref (EV_A);
1198 w->active = 0; 1817 w->active = 0;
1199} 1818}
1200 1819
1201/*****************************************************************************/ 1820/*****************************************************************************/
1202 1821
1203void 1822void noinline
1204ev_io_start (EV_P_ struct ev_io *w) 1823ev_io_start (EV_P_ ev_io *w)
1205{ 1824{
1206 int fd = w->fd; 1825 int fd = w->fd;
1207 1826
1208 if (ev_is_active (w)) 1827 if (expect_false (ev_is_active (w)))
1209 return; 1828 return;
1210 1829
1211 assert (("ev_io_start called with negative fd", fd >= 0)); 1830 assert (("ev_io_start called with negative fd", fd >= 0));
1212 1831
1213 ev_start (EV_A_ (W)w, 1); 1832 ev_start (EV_A_ (W)w, 1);
1214 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1833 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1215 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1834 wlist_add (&anfds[fd].head, (WL)w);
1216 1835
1217 fd_change (EV_A_ fd); 1836 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1837 w->events &= ~EV_IOFDSET;
1218} 1838}
1219 1839
1220void 1840void noinline
1221ev_io_stop (EV_P_ struct ev_io *w) 1841ev_io_stop (EV_P_ ev_io *w)
1222{ 1842{
1223 ev_clear_pending (EV_A_ (W)w); 1843 clear_pending (EV_A_ (W)w);
1224 if (!ev_is_active (w)) 1844 if (expect_false (!ev_is_active (w)))
1225 return; 1845 return;
1226 1846
1847 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1848
1227 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1849 wlist_del (&anfds[w->fd].head, (WL)w);
1228 ev_stop (EV_A_ (W)w); 1850 ev_stop (EV_A_ (W)w);
1229 1851
1230 fd_change (EV_A_ w->fd); 1852 fd_change (EV_A_ w->fd, 1);
1231} 1853}
1232 1854
1233void 1855void noinline
1234ev_timer_start (EV_P_ struct ev_timer *w) 1856ev_timer_start (EV_P_ ev_timer *w)
1235{ 1857{
1236 if (ev_is_active (w)) 1858 if (expect_false (ev_is_active (w)))
1237 return; 1859 return;
1238 1860
1239 ((WT)w)->at += mn_now; 1861 ((WT)w)->at += mn_now;
1240 1862
1241 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 1863 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1242 1864
1243 ev_start (EV_A_ (W)w, ++timercnt); 1865 ev_start (EV_A_ (W)w, ++timercnt);
1244 array_needsize (timers, timermax, timercnt, (void)); 1866 array_needsize (WT, timers, timermax, timercnt, EMPTY2);
1245 timers [timercnt - 1] = w; 1867 timers [timercnt - 1] = (WT)w;
1246 upheap ((WT *)timers, timercnt - 1); 1868 upheap (timers, timercnt - 1);
1247 1869
1248 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 1870 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
1249} 1871}
1250 1872
1251void 1873void noinline
1252ev_timer_stop (EV_P_ struct ev_timer *w) 1874ev_timer_stop (EV_P_ ev_timer *w)
1253{ 1875{
1254 ev_clear_pending (EV_A_ (W)w); 1876 clear_pending (EV_A_ (W)w);
1255 if (!ev_is_active (w)) 1877 if (expect_false (!ev_is_active (w)))
1256 return; 1878 return;
1257 1879
1258 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 1880 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
1259 1881
1260 if (((W)w)->active < timercnt--) 1882 {
1883 int active = ((W)w)->active;
1884
1885 if (expect_true (--active < --timercnt))
1261 { 1886 {
1262 timers [((W)w)->active - 1] = timers [timercnt]; 1887 timers [active] = timers [timercnt];
1263 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 1888 adjustheap (timers, timercnt, active);
1264 } 1889 }
1890 }
1265 1891
1266 ((WT)w)->at = w->repeat; 1892 ((WT)w)->at -= mn_now;
1267 1893
1268 ev_stop (EV_A_ (W)w); 1894 ev_stop (EV_A_ (W)w);
1269} 1895}
1270 1896
1271void 1897void noinline
1272ev_timer_again (EV_P_ struct ev_timer *w) 1898ev_timer_again (EV_P_ ev_timer *w)
1273{ 1899{
1274 if (ev_is_active (w)) 1900 if (ev_is_active (w))
1275 { 1901 {
1276 if (w->repeat) 1902 if (w->repeat)
1277 { 1903 {
1278 ((WT)w)->at = mn_now + w->repeat; 1904 ((WT)w)->at = mn_now + w->repeat;
1279 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 1905 adjustheap (timers, timercnt, ((W)w)->active - 1);
1280 } 1906 }
1281 else 1907 else
1282 ev_timer_stop (EV_A_ w); 1908 ev_timer_stop (EV_A_ w);
1283 } 1909 }
1284 else if (w->repeat) 1910 else if (w->repeat)
1911 {
1912 w->at = w->repeat;
1285 ev_timer_start (EV_A_ w); 1913 ev_timer_start (EV_A_ w);
1914 }
1286} 1915}
1287 1916
1288void 1917#if EV_PERIODIC_ENABLE
1918void noinline
1289ev_periodic_start (EV_P_ struct ev_periodic *w) 1919ev_periodic_start (EV_P_ ev_periodic *w)
1290{ 1920{
1291 if (ev_is_active (w)) 1921 if (expect_false (ev_is_active (w)))
1292 return; 1922 return;
1293 1923
1924 if (w->reschedule_cb)
1925 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1926 else if (w->interval)
1927 {
1294 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 1928 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1295
1296 /* this formula differs from the one in periodic_reify because we do not always round up */ 1929 /* this formula differs from the one in periodic_reify because we do not always round up */
1297 if (w->interval)
1298 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; 1930 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1931 }
1932 else
1933 ((WT)w)->at = w->offset;
1299 1934
1300 ev_start (EV_A_ (W)w, ++periodiccnt); 1935 ev_start (EV_A_ (W)w, ++periodiccnt);
1301 array_needsize (periodics, periodicmax, periodiccnt, (void)); 1936 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
1302 periodics [periodiccnt - 1] = w; 1937 periodics [periodiccnt - 1] = (WT)w;
1303 upheap ((WT *)periodics, periodiccnt - 1); 1938 upheap (periodics, periodiccnt - 1);
1304 1939
1305 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 1940 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
1306} 1941}
1307 1942
1308void 1943void noinline
1309ev_periodic_stop (EV_P_ struct ev_periodic *w) 1944ev_periodic_stop (EV_P_ ev_periodic *w)
1310{ 1945{
1311 ev_clear_pending (EV_A_ (W)w); 1946 clear_pending (EV_A_ (W)w);
1312 if (!ev_is_active (w)) 1947 if (expect_false (!ev_is_active (w)))
1313 return; 1948 return;
1314 1949
1315 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 1950 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
1316 1951
1317 if (((W)w)->active < periodiccnt--) 1952 {
1953 int active = ((W)w)->active;
1954
1955 if (expect_true (--active < --periodiccnt))
1318 { 1956 {
1319 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 1957 periodics [active] = periodics [periodiccnt];
1320 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 1958 adjustheap (periodics, periodiccnt, active);
1321 } 1959 }
1960 }
1322 1961
1323 ev_stop (EV_A_ (W)w); 1962 ev_stop (EV_A_ (W)w);
1324} 1963}
1325 1964
1326void 1965void noinline
1327ev_idle_start (EV_P_ struct ev_idle *w) 1966ev_periodic_again (EV_P_ ev_periodic *w)
1328{ 1967{
1329 if (ev_is_active (w)) 1968 /* TODO: use adjustheap and recalculation */
1330 return;
1331
1332 ev_start (EV_A_ (W)w, ++idlecnt);
1333 array_needsize (idles, idlemax, idlecnt, (void));
1334 idles [idlecnt - 1] = w;
1335}
1336
1337void
1338ev_idle_stop (EV_P_ struct ev_idle *w)
1339{
1340 ev_clear_pending (EV_A_ (W)w);
1341 if (ev_is_active (w))
1342 return;
1343
1344 idles [((W)w)->active - 1] = idles [--idlecnt];
1345 ev_stop (EV_A_ (W)w); 1969 ev_periodic_stop (EV_A_ w);
1970 ev_periodic_start (EV_A_ w);
1346} 1971}
1347 1972#endif
1348void
1349ev_prepare_start (EV_P_ struct ev_prepare *w)
1350{
1351 if (ev_is_active (w))
1352 return;
1353
1354 ev_start (EV_A_ (W)w, ++preparecnt);
1355 array_needsize (prepares, preparemax, preparecnt, (void));
1356 prepares [preparecnt - 1] = w;
1357}
1358
1359void
1360ev_prepare_stop (EV_P_ struct ev_prepare *w)
1361{
1362 ev_clear_pending (EV_A_ (W)w);
1363 if (ev_is_active (w))
1364 return;
1365
1366 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1367 ev_stop (EV_A_ (W)w);
1368}
1369
1370void
1371ev_check_start (EV_P_ struct ev_check *w)
1372{
1373 if (ev_is_active (w))
1374 return;
1375
1376 ev_start (EV_A_ (W)w, ++checkcnt);
1377 array_needsize (checks, checkmax, checkcnt, (void));
1378 checks [checkcnt - 1] = w;
1379}
1380
1381void
1382ev_check_stop (EV_P_ struct ev_check *w)
1383{
1384 ev_clear_pending (EV_A_ (W)w);
1385 if (ev_is_active (w))
1386 return;
1387
1388 checks [((W)w)->active - 1] = checks [--checkcnt];
1389 ev_stop (EV_A_ (W)w);
1390}
1391 1973
1392#ifndef SA_RESTART 1974#ifndef SA_RESTART
1393# define SA_RESTART 0 1975# define SA_RESTART 0
1394#endif 1976#endif
1395 1977
1396void 1978void noinline
1397ev_signal_start (EV_P_ struct ev_signal *w) 1979ev_signal_start (EV_P_ ev_signal *w)
1398{ 1980{
1399#if EV_MULTIPLICITY 1981#if EV_MULTIPLICITY
1400 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 1982 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1401#endif 1983#endif
1402 if (ev_is_active (w)) 1984 if (expect_false (ev_is_active (w)))
1403 return; 1985 return;
1404 1986
1405 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 1987 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1406 1988
1989 evpipe_init (EV_A);
1990
1991 {
1992#ifndef _WIN32
1993 sigset_t full, prev;
1994 sigfillset (&full);
1995 sigprocmask (SIG_SETMASK, &full, &prev);
1996#endif
1997
1998 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1999
2000#ifndef _WIN32
2001 sigprocmask (SIG_SETMASK, &prev, 0);
2002#endif
2003 }
2004
1407 ev_start (EV_A_ (W)w, 1); 2005 ev_start (EV_A_ (W)w, 1);
1408 array_needsize (signals, signalmax, w->signum, signals_init);
1409 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2006 wlist_add (&signals [w->signum - 1].head, (WL)w);
1410 2007
1411 if (!((WL)w)->next) 2008 if (!((WL)w)->next)
1412 { 2009 {
1413#if WIN32 2010#if _WIN32
1414 signal (w->signum, sighandler); 2011 signal (w->signum, ev_sighandler);
1415#else 2012#else
1416 struct sigaction sa; 2013 struct sigaction sa;
1417 sa.sa_handler = sighandler; 2014 sa.sa_handler = ev_sighandler;
1418 sigfillset (&sa.sa_mask); 2015 sigfillset (&sa.sa_mask);
1419 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2016 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1420 sigaction (w->signum, &sa, 0); 2017 sigaction (w->signum, &sa, 0);
1421#endif 2018#endif
1422 } 2019 }
1423} 2020}
1424 2021
1425void 2022void noinline
1426ev_signal_stop (EV_P_ struct ev_signal *w) 2023ev_signal_stop (EV_P_ ev_signal *w)
1427{ 2024{
1428 ev_clear_pending (EV_A_ (W)w); 2025 clear_pending (EV_A_ (W)w);
1429 if (!ev_is_active (w)) 2026 if (expect_false (!ev_is_active (w)))
1430 return; 2027 return;
1431 2028
1432 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2029 wlist_del (&signals [w->signum - 1].head, (WL)w);
1433 ev_stop (EV_A_ (W)w); 2030 ev_stop (EV_A_ (W)w);
1434 2031
1435 if (!signals [w->signum - 1].head) 2032 if (!signals [w->signum - 1].head)
1436 signal (w->signum, SIG_DFL); 2033 signal (w->signum, SIG_DFL);
1437} 2034}
1438 2035
1439void 2036void
1440ev_child_start (EV_P_ struct ev_child *w) 2037ev_child_start (EV_P_ ev_child *w)
1441{ 2038{
1442#if EV_MULTIPLICITY 2039#if EV_MULTIPLICITY
1443 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2040 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1444#endif 2041#endif
1445 if (ev_is_active (w)) 2042 if (expect_false (ev_is_active (w)))
1446 return; 2043 return;
1447 2044
1448 ev_start (EV_A_ (W)w, 1); 2045 ev_start (EV_A_ (W)w, 1);
1449 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2046 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1450} 2047}
1451 2048
1452void 2049void
1453ev_child_stop (EV_P_ struct ev_child *w) 2050ev_child_stop (EV_P_ ev_child *w)
1454{ 2051{
1455 ev_clear_pending (EV_A_ (W)w); 2052 clear_pending (EV_A_ (W)w);
1456 if (ev_is_active (w)) 2053 if (expect_false (!ev_is_active (w)))
1457 return; 2054 return;
1458 2055
1459 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2056 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1460 ev_stop (EV_A_ (W)w); 2057 ev_stop (EV_A_ (W)w);
1461} 2058}
1462 2059
2060#if EV_STAT_ENABLE
2061
2062# ifdef _WIN32
2063# undef lstat
2064# define lstat(a,b) _stati64 (a,b)
2065# endif
2066
2067#define DEF_STAT_INTERVAL 5.0074891
2068#define MIN_STAT_INTERVAL 0.1074891
2069
2070static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2071
2072#if EV_USE_INOTIFY
2073# define EV_INOTIFY_BUFSIZE 8192
2074
2075static void noinline
2076infy_add (EV_P_ ev_stat *w)
2077{
2078 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);
2079
2080 if (w->wd < 0)
2081 {
2082 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2083
2084 /* monitor some parent directory for speedup hints */
2085 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2086 {
2087 char path [4096];
2088 strcpy (path, w->path);
2089
2090 do
2091 {
2092 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2093 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2094
2095 char *pend = strrchr (path, '/');
2096
2097 if (!pend)
2098 break; /* whoops, no '/', complain to your admin */
2099
2100 *pend = 0;
2101 w->wd = inotify_add_watch (fs_fd, path, mask);
2102 }
2103 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2104 }
2105 }
2106 else
2107 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2108
2109 if (w->wd >= 0)
2110 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2111}
2112
2113static void noinline
2114infy_del (EV_P_ ev_stat *w)
2115{
2116 int slot;
2117 int wd = w->wd;
2118
2119 if (wd < 0)
2120 return;
2121
2122 w->wd = -2;
2123 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2124 wlist_del (&fs_hash [slot].head, (WL)w);
2125
2126 /* remove this watcher, if others are watching it, they will rearm */
2127 inotify_rm_watch (fs_fd, wd);
2128}
2129
2130static void noinline
2131infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2132{
2133 if (slot < 0)
2134 /* overflow, need to check for all hahs slots */
2135 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2136 infy_wd (EV_A_ slot, wd, ev);
2137 else
2138 {
2139 WL w_;
2140
2141 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2142 {
2143 ev_stat *w = (ev_stat *)w_;
2144 w_ = w_->next; /* lets us remove this watcher and all before it */
2145
2146 if (w->wd == wd || wd == -1)
2147 {
2148 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2149 {
2150 w->wd = -1;
2151 infy_add (EV_A_ w); /* re-add, no matter what */
2152 }
2153
2154 stat_timer_cb (EV_A_ &w->timer, 0);
2155 }
2156 }
2157 }
2158}
2159
2160static void
2161infy_cb (EV_P_ ev_io *w, int revents)
2162{
2163 char buf [EV_INOTIFY_BUFSIZE];
2164 struct inotify_event *ev = (struct inotify_event *)buf;
2165 int ofs;
2166 int len = read (fs_fd, buf, sizeof (buf));
2167
2168 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2169 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2170}
2171
2172void inline_size
2173infy_init (EV_P)
2174{
2175 if (fs_fd != -2)
2176 return;
2177
2178 fs_fd = inotify_init ();
2179
2180 if (fs_fd >= 0)
2181 {
2182 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2183 ev_set_priority (&fs_w, EV_MAXPRI);
2184 ev_io_start (EV_A_ &fs_w);
2185 }
2186}
2187
2188void inline_size
2189infy_fork (EV_P)
2190{
2191 int slot;
2192
2193 if (fs_fd < 0)
2194 return;
2195
2196 close (fs_fd);
2197 fs_fd = inotify_init ();
2198
2199 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2200 {
2201 WL w_ = fs_hash [slot].head;
2202 fs_hash [slot].head = 0;
2203
2204 while (w_)
2205 {
2206 ev_stat *w = (ev_stat *)w_;
2207 w_ = w_->next; /* lets us add this watcher */
2208
2209 w->wd = -1;
2210
2211 if (fs_fd >= 0)
2212 infy_add (EV_A_ w); /* re-add, no matter what */
2213 else
2214 ev_timer_start (EV_A_ &w->timer);
2215 }
2216
2217 }
2218}
2219
2220#endif
2221
2222void
2223ev_stat_stat (EV_P_ ev_stat *w)
2224{
2225 if (lstat (w->path, &w->attr) < 0)
2226 w->attr.st_nlink = 0;
2227 else if (!w->attr.st_nlink)
2228 w->attr.st_nlink = 1;
2229}
2230
2231static void noinline
2232stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2233{
2234 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2235
2236 /* we copy this here each the time so that */
2237 /* prev has the old value when the callback gets invoked */
2238 w->prev = w->attr;
2239 ev_stat_stat (EV_A_ w);
2240
2241 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2242 if (
2243 w->prev.st_dev != w->attr.st_dev
2244 || w->prev.st_ino != w->attr.st_ino
2245 || w->prev.st_mode != w->attr.st_mode
2246 || w->prev.st_nlink != w->attr.st_nlink
2247 || w->prev.st_uid != w->attr.st_uid
2248 || w->prev.st_gid != w->attr.st_gid
2249 || w->prev.st_rdev != w->attr.st_rdev
2250 || w->prev.st_size != w->attr.st_size
2251 || w->prev.st_atime != w->attr.st_atime
2252 || w->prev.st_mtime != w->attr.st_mtime
2253 || w->prev.st_ctime != w->attr.st_ctime
2254 ) {
2255 #if EV_USE_INOTIFY
2256 infy_del (EV_A_ w);
2257 infy_add (EV_A_ w);
2258 ev_stat_stat (EV_A_ w); /* avoid race... */
2259 #endif
2260
2261 ev_feed_event (EV_A_ w, EV_STAT);
2262 }
2263}
2264
2265void
2266ev_stat_start (EV_P_ ev_stat *w)
2267{
2268 if (expect_false (ev_is_active (w)))
2269 return;
2270
2271 /* since we use memcmp, we need to clear any padding data etc. */
2272 memset (&w->prev, 0, sizeof (ev_statdata));
2273 memset (&w->attr, 0, sizeof (ev_statdata));
2274
2275 ev_stat_stat (EV_A_ w);
2276
2277 if (w->interval < MIN_STAT_INTERVAL)
2278 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2279
2280 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2281 ev_set_priority (&w->timer, ev_priority (w));
2282
2283#if EV_USE_INOTIFY
2284 infy_init (EV_A);
2285
2286 if (fs_fd >= 0)
2287 infy_add (EV_A_ w);
2288 else
2289#endif
2290 ev_timer_start (EV_A_ &w->timer);
2291
2292 ev_start (EV_A_ (W)w, 1);
2293}
2294
2295void
2296ev_stat_stop (EV_P_ ev_stat *w)
2297{
2298 clear_pending (EV_A_ (W)w);
2299 if (expect_false (!ev_is_active (w)))
2300 return;
2301
2302#if EV_USE_INOTIFY
2303 infy_del (EV_A_ w);
2304#endif
2305 ev_timer_stop (EV_A_ &w->timer);
2306
2307 ev_stop (EV_A_ (W)w);
2308}
2309#endif
2310
2311#if EV_IDLE_ENABLE
2312void
2313ev_idle_start (EV_P_ ev_idle *w)
2314{
2315 if (expect_false (ev_is_active (w)))
2316 return;
2317
2318 pri_adjust (EV_A_ (W)w);
2319
2320 {
2321 int active = ++idlecnt [ABSPRI (w)];
2322
2323 ++idleall;
2324 ev_start (EV_A_ (W)w, active);
2325
2326 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2327 idles [ABSPRI (w)][active - 1] = w;
2328 }
2329}
2330
2331void
2332ev_idle_stop (EV_P_ ev_idle *w)
2333{
2334 clear_pending (EV_A_ (W)w);
2335 if (expect_false (!ev_is_active (w)))
2336 return;
2337
2338 {
2339 int active = ((W)w)->active;
2340
2341 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2342 ((W)idles [ABSPRI (w)][active - 1])->active = active;
2343
2344 ev_stop (EV_A_ (W)w);
2345 --idleall;
2346 }
2347}
2348#endif
2349
2350void
2351ev_prepare_start (EV_P_ ev_prepare *w)
2352{
2353 if (expect_false (ev_is_active (w)))
2354 return;
2355
2356 ev_start (EV_A_ (W)w, ++preparecnt);
2357 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2358 prepares [preparecnt - 1] = w;
2359}
2360
2361void
2362ev_prepare_stop (EV_P_ ev_prepare *w)
2363{
2364 clear_pending (EV_A_ (W)w);
2365 if (expect_false (!ev_is_active (w)))
2366 return;
2367
2368 {
2369 int active = ((W)w)->active;
2370 prepares [active - 1] = prepares [--preparecnt];
2371 ((W)prepares [active - 1])->active = active;
2372 }
2373
2374 ev_stop (EV_A_ (W)w);
2375}
2376
2377void
2378ev_check_start (EV_P_ ev_check *w)
2379{
2380 if (expect_false (ev_is_active (w)))
2381 return;
2382
2383 ev_start (EV_A_ (W)w, ++checkcnt);
2384 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2385 checks [checkcnt - 1] = w;
2386}
2387
2388void
2389ev_check_stop (EV_P_ ev_check *w)
2390{
2391 clear_pending (EV_A_ (W)w);
2392 if (expect_false (!ev_is_active (w)))
2393 return;
2394
2395 {
2396 int active = ((W)w)->active;
2397 checks [active - 1] = checks [--checkcnt];
2398 ((W)checks [active - 1])->active = active;
2399 }
2400
2401 ev_stop (EV_A_ (W)w);
2402}
2403
2404#if EV_EMBED_ENABLE
2405void noinline
2406ev_embed_sweep (EV_P_ ev_embed *w)
2407{
2408 ev_loop (w->other, EVLOOP_NONBLOCK);
2409}
2410
2411static void
2412embed_io_cb (EV_P_ ev_io *io, int revents)
2413{
2414 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2415
2416 if (ev_cb (w))
2417 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2418 else
2419 ev_loop (w->other, EVLOOP_NONBLOCK);
2420}
2421
2422static void
2423embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2424{
2425 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2426
2427 {
2428 struct ev_loop *loop = w->other;
2429
2430 while (fdchangecnt)
2431 {
2432 fd_reify (EV_A);
2433 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2434 }
2435 }
2436}
2437
2438#if 0
2439static void
2440embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2441{
2442 ev_idle_stop (EV_A_ idle);
2443}
2444#endif
2445
2446void
2447ev_embed_start (EV_P_ ev_embed *w)
2448{
2449 if (expect_false (ev_is_active (w)))
2450 return;
2451
2452 {
2453 struct ev_loop *loop = w->other;
2454 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2455 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2456 }
2457
2458 ev_set_priority (&w->io, ev_priority (w));
2459 ev_io_start (EV_A_ &w->io);
2460
2461 ev_prepare_init (&w->prepare, embed_prepare_cb);
2462 ev_set_priority (&w->prepare, EV_MINPRI);
2463 ev_prepare_start (EV_A_ &w->prepare);
2464
2465 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2466
2467 ev_start (EV_A_ (W)w, 1);
2468}
2469
2470void
2471ev_embed_stop (EV_P_ ev_embed *w)
2472{
2473 clear_pending (EV_A_ (W)w);
2474 if (expect_false (!ev_is_active (w)))
2475 return;
2476
2477 ev_io_stop (EV_A_ &w->io);
2478 ev_prepare_stop (EV_A_ &w->prepare);
2479
2480 ev_stop (EV_A_ (W)w);
2481}
2482#endif
2483
2484#if EV_FORK_ENABLE
2485void
2486ev_fork_start (EV_P_ ev_fork *w)
2487{
2488 if (expect_false (ev_is_active (w)))
2489 return;
2490
2491 ev_start (EV_A_ (W)w, ++forkcnt);
2492 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2493 forks [forkcnt - 1] = w;
2494}
2495
2496void
2497ev_fork_stop (EV_P_ ev_fork *w)
2498{
2499 clear_pending (EV_A_ (W)w);
2500 if (expect_false (!ev_is_active (w)))
2501 return;
2502
2503 {
2504 int active = ((W)w)->active;
2505 forks [active - 1] = forks [--forkcnt];
2506 ((W)forks [active - 1])->active = active;
2507 }
2508
2509 ev_stop (EV_A_ (W)w);
2510}
2511#endif
2512
2513#if EV_ASYNC_ENABLE
2514void
2515ev_async_start (EV_P_ ev_async *w)
2516{
2517 if (expect_false (ev_is_active (w)))
2518 return;
2519
2520 evpipe_init (EV_A);
2521
2522 ev_start (EV_A_ (W)w, ++asynccnt);
2523 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2524 asyncs [asynccnt - 1] = w;
2525}
2526
2527void
2528ev_async_stop (EV_P_ ev_async *w)
2529{
2530 clear_pending (EV_A_ (W)w);
2531 if (expect_false (!ev_is_active (w)))
2532 return;
2533
2534 {
2535 int active = ((W)w)->active;
2536 asyncs [active - 1] = asyncs [--asynccnt];
2537 ((W)asyncs [active - 1])->active = active;
2538 }
2539
2540 ev_stop (EV_A_ (W)w);
2541}
2542
2543void
2544ev_async_send (EV_P_ ev_async *w)
2545{
2546 w->sent = 1;
2547 evpipe_write (EV_A_ &gotasync);
2548}
2549#endif
2550
1463/*****************************************************************************/ 2551/*****************************************************************************/
1464 2552
1465struct ev_once 2553struct ev_once
1466{ 2554{
1467 struct ev_io io; 2555 ev_io io;
1468 struct ev_timer to; 2556 ev_timer to;
1469 void (*cb)(int revents, void *arg); 2557 void (*cb)(int revents, void *arg);
1470 void *arg; 2558 void *arg;
1471}; 2559};
1472 2560
1473static void 2561static void
… …
1482 2570
1483 cb (revents, arg); 2571 cb (revents, arg);
1484} 2572}
1485 2573
1486static void 2574static void
1487once_cb_io (EV_P_ struct ev_io *w, int revents) 2575once_cb_io (EV_P_ ev_io *w, int revents)
1488{ 2576{
1489 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2577 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1490} 2578}
1491 2579
1492static void 2580static void
1493once_cb_to (EV_P_ struct ev_timer *w, int revents) 2581once_cb_to (EV_P_ ev_timer *w, int revents)
1494{ 2582{
1495 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2583 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1496} 2584}
1497 2585
1498void 2586void
1499ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2587ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1500{ 2588{
1501 struct ev_once *once = ev_malloc (sizeof (struct ev_once)); 2589 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1502 2590
1503 if (!once) 2591 if (expect_false (!once))
2592 {
1504 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 2593 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1505 else 2594 return;
1506 { 2595 }
2596
1507 once->cb = cb; 2597 once->cb = cb;
1508 once->arg = arg; 2598 once->arg = arg;
1509 2599
1510 ev_watcher_init (&once->io, once_cb_io); 2600 ev_init (&once->io, once_cb_io);
1511 if (fd >= 0) 2601 if (fd >= 0)
1512 { 2602 {
1513 ev_io_set (&once->io, fd, events); 2603 ev_io_set (&once->io, fd, events);
1514 ev_io_start (EV_A_ &once->io); 2604 ev_io_start (EV_A_ &once->io);
1515 } 2605 }
1516 2606
1517 ev_watcher_init (&once->to, once_cb_to); 2607 ev_init (&once->to, once_cb_to);
1518 if (timeout >= 0.) 2608 if (timeout >= 0.)
1519 { 2609 {
1520 ev_timer_set (&once->to, timeout, 0.); 2610 ev_timer_set (&once->to, timeout, 0.);
1521 ev_timer_start (EV_A_ &once->to); 2611 ev_timer_start (EV_A_ &once->to);
1522 }
1523 } 2612 }
1524} 2613}
1525 2614
2615#if EV_MULTIPLICITY
2616 #include "ev_wrap.h"
2617#endif
2618
2619#ifdef __cplusplus
2620}
2621#endif
2622

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