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Comparing libev/ev.c (file contents):
Revision 1.77 by root, Thu Nov 8 00:44:17 2007 UTC vs.
Revision 1.234 by root, Tue May 6 23:42:16 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 */
273# include <stdint.h>
274# ifdef __cplusplus
275extern "C" {
276# endif
277int eventfd (unsigned int initval, int flags);
278# ifdef __cplusplus
279}
280# endif
281#endif
282
124/**/ 283/**/
125 284
285/*
286 * This is used to avoid floating point rounding problems.
287 * It is added to ev_rt_now when scheduling periodics
288 * to ensure progress, time-wise, even when rounding
289 * errors are against us.
290 * This value is good at least till the year 4000.
291 * Better solutions welcome.
292 */
293#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
294
126#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 295#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) */ 296#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 */ 297/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
130 298
131#include "ev.h"
132
133#if __GNUC__ >= 3 299#if __GNUC__ >= 4
134# define expect(expr,value) __builtin_expect ((expr),(value)) 300# define expect(expr,value) __builtin_expect ((expr),(value))
135# define inline inline 301# define noinline __attribute__ ((noinline))
136#else 302#else
137# define expect(expr,value) (expr) 303# define expect(expr,value) (expr)
138# define inline static 304# define noinline
305# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
306# define inline
307# endif
139#endif 308#endif
140 309
141#define expect_false(expr) expect ((expr) != 0, 0) 310#define expect_false(expr) expect ((expr) != 0, 0)
142#define expect_true(expr) expect ((expr) != 0, 1) 311#define expect_true(expr) expect ((expr) != 0, 1)
312#define inline_size static inline
313
314#if EV_MINIMAL
315# define inline_speed static noinline
316#else
317# define inline_speed static inline
318#endif
143 319
144#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 320#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
145#define ABSPRI(w) ((w)->priority - EV_MINPRI) 321#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
146 322
323#define EMPTY /* required for microsofts broken pseudo-c compiler */
324#define EMPTY2(a,b) /* used to suppress some warnings */
325
147typedef struct ev_watcher *W; 326typedef ev_watcher *W;
148typedef struct ev_watcher_list *WL; 327typedef ev_watcher_list *WL;
149typedef struct ev_watcher_time *WT; 328typedef ev_watcher_time *WT;
150 329
330#define ev_active(w) ((W)(w))->active
331#define ev_at(w) ((WT)(w))->at
332
333#if EV_USE_MONOTONIC
334/* sig_atomic_t is used to avoid per-thread variables or locking but still */
335/* giving it a reasonably high chance of working on typical architetcures */
151static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 336static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
337#endif
152 338
339#ifdef _WIN32
153#include "ev_win32.c" 340# include "ev_win32.c"
341#endif
154 342
155/*****************************************************************************/ 343/*****************************************************************************/
156 344
157static void (*syserr_cb)(const char *msg); 345static void (*syserr_cb)(const char *msg);
158 346
347void
159void ev_set_syserr_cb (void (*cb)(const char *msg)) 348ev_set_syserr_cb (void (*cb)(const char *msg))
160{ 349{
161 syserr_cb = cb; 350 syserr_cb = cb;
162} 351}
163 352
164static void 353static void noinline
165syserr (const char *msg) 354syserr (const char *msg)
166{ 355{
167 if (!msg) 356 if (!msg)
168 msg = "(libev) system error"; 357 msg = "(libev) system error";
169 358
… …
174 perror (msg); 363 perror (msg);
175 abort (); 364 abort ();
176 } 365 }
177} 366}
178 367
368static void *
369ev_realloc_emul (void *ptr, long size)
370{
371 /* some systems, notably openbsd and darwin, fail to properly
372 * implement realloc (x, 0) (as required by both ansi c-98 and
373 * the single unix specification, so work around them here.
374 */
375
376 if (size)
377 return realloc (ptr, size);
378
379 free (ptr);
380 return 0;
381}
382
179static void *(*alloc)(void *ptr, long size); 383static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
180 384
385void
181void ev_set_allocator (void *(*cb)(void *ptr, long size)) 386ev_set_allocator (void *(*cb)(void *ptr, long size))
182{ 387{
183 alloc = cb; 388 alloc = cb;
184} 389}
185 390
186static void * 391inline_speed void *
187ev_realloc (void *ptr, long size) 392ev_realloc (void *ptr, long size)
188{ 393{
189 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 394 ptr = alloc (ptr, size);
190 395
191 if (!ptr && size) 396 if (!ptr && size)
192 { 397 {
193 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 398 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
194 abort (); 399 abort ();
… …
205typedef struct 410typedef struct
206{ 411{
207 WL head; 412 WL head;
208 unsigned char events; 413 unsigned char events;
209 unsigned char reify; 414 unsigned char reify;
415#if EV_SELECT_IS_WINSOCKET
416 SOCKET handle;
417#endif
210} ANFD; 418} ANFD;
211 419
212typedef struct 420typedef struct
213{ 421{
214 W w; 422 W w;
215 int events; 423 int events;
216} ANPENDING; 424} ANPENDING;
217 425
426#if EV_USE_INOTIFY
427typedef struct
428{
429 WL head;
430} ANFS;
431#endif
432
218#if EV_MULTIPLICITY 433#if EV_MULTIPLICITY
219 434
220struct ev_loop 435 struct ev_loop
221{ 436 {
437 ev_tstamp ev_rt_now;
438 #define ev_rt_now ((loop)->ev_rt_now)
222# define VAR(name,decl) decl; 439 #define VAR(name,decl) decl;
223# include "ev_vars.h" 440 #include "ev_vars.h"
224};
225# undef VAR 441 #undef VAR
442 };
226# include "ev_wrap.h" 443 #include "ev_wrap.h"
444
445 static struct ev_loop default_loop_struct;
446 struct ev_loop *ev_default_loop_ptr;
227 447
228#else 448#else
229 449
450 ev_tstamp ev_rt_now;
230# define VAR(name,decl) static decl; 451 #define VAR(name,decl) static decl;
231# include "ev_vars.h" 452 #include "ev_vars.h"
232# undef VAR 453 #undef VAR
454
455 static int ev_default_loop_ptr;
233 456
234#endif 457#endif
235 458
236/*****************************************************************************/ 459/*****************************************************************************/
237 460
238inline ev_tstamp 461ev_tstamp
239ev_time (void) 462ev_time (void)
240{ 463{
241#if EV_USE_REALTIME 464#if EV_USE_REALTIME
242 struct timespec ts; 465 struct timespec ts;
243 clock_gettime (CLOCK_REALTIME, &ts); 466 clock_gettime (CLOCK_REALTIME, &ts);
… …
247 gettimeofday (&tv, 0); 470 gettimeofday (&tv, 0);
248 return tv.tv_sec + tv.tv_usec * 1e-6; 471 return tv.tv_sec + tv.tv_usec * 1e-6;
249#endif 472#endif
250} 473}
251 474
252inline ev_tstamp 475ev_tstamp inline_size
253get_clock (void) 476get_clock (void)
254{ 477{
255#if EV_USE_MONOTONIC 478#if EV_USE_MONOTONIC
256 if (expect_true (have_monotonic)) 479 if (expect_true (have_monotonic))
257 { 480 {
… …
262#endif 485#endif
263 486
264 return ev_time (); 487 return ev_time ();
265} 488}
266 489
490#if EV_MULTIPLICITY
267ev_tstamp 491ev_tstamp
268ev_now (EV_P) 492ev_now (EV_P)
269{ 493{
270 return rt_now; 494 return ev_rt_now;
271} 495}
496#endif
272 497
273#define array_roundsize(type,n) ((n) | 4 & ~3) 498void
499ev_sleep (ev_tstamp delay)
500{
501 if (delay > 0.)
502 {
503#if EV_USE_NANOSLEEP
504 struct timespec ts;
505
506 ts.tv_sec = (time_t)delay;
507 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
508
509 nanosleep (&ts, 0);
510#elif defined(_WIN32)
511 Sleep ((unsigned long)(delay * 1e3));
512#else
513 struct timeval tv;
514
515 tv.tv_sec = (time_t)delay;
516 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
517
518 select (0, 0, 0, 0, &tv);
519#endif
520 }
521}
522
523/*****************************************************************************/
524
525#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
526
527int inline_size
528array_nextsize (int elem, int cur, int cnt)
529{
530 int ncur = cur + 1;
531
532 do
533 ncur <<= 1;
534 while (cnt > ncur);
535
536 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
537 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
538 {
539 ncur *= elem;
540 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
541 ncur = ncur - sizeof (void *) * 4;
542 ncur /= elem;
543 }
544
545 return ncur;
546}
547
548static noinline void *
549array_realloc (int elem, void *base, int *cur, int cnt)
550{
551 *cur = array_nextsize (elem, *cur, cnt);
552 return ev_realloc (base, elem * *cur);
553}
274 554
275#define array_needsize(type,base,cur,cnt,init) \ 555#define array_needsize(type,base,cur,cnt,init) \
276 if (expect_false ((cnt) > cur)) \ 556 if (expect_false ((cnt) > (cur))) \
277 { \ 557 { \
278 int newcnt = cur; \ 558 int ocur_ = (cur); \
279 do \ 559 (base) = (type *)array_realloc \
280 { \ 560 (sizeof (type), (base), &(cur), (cnt)); \
281 newcnt = array_roundsize (type, newcnt << 1); \ 561 init ((base) + (ocur_), (cur) - ocur_); \
282 } \
283 while ((cnt) > newcnt); \
284 \
285 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
286 init (base + cur, newcnt - cur); \
287 cur = newcnt; \
288 } 562 }
289 563
564#if 0
290#define array_slim(type,stem) \ 565#define array_slim(type,stem) \
291 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 566 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
292 { \ 567 { \
293 stem ## max = array_roundsize (stem ## cnt >> 1); \ 568 stem ## max = array_roundsize (stem ## cnt >> 1); \
294 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 569 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
295 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 570 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
296 } 571 }
297 572#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;
302 573
303#define array_free(stem, idx) \ 574#define array_free(stem, idx) \
304 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 575 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
305 576
306/*****************************************************************************/ 577/*****************************************************************************/
307 578
308static void 579void noinline
580ev_feed_event (EV_P_ void *w, int revents)
581{
582 W w_ = (W)w;
583 int pri = ABSPRI (w_);
584
585 if (expect_false (w_->pending))
586 pendings [pri][w_->pending - 1].events |= revents;
587 else
588 {
589 w_->pending = ++pendingcnt [pri];
590 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
591 pendings [pri][w_->pending - 1].w = w_;
592 pendings [pri][w_->pending - 1].events = revents;
593 }
594}
595
596void inline_speed
597queue_events (EV_P_ W *events, int eventcnt, int type)
598{
599 int i;
600
601 for (i = 0; i < eventcnt; ++i)
602 ev_feed_event (EV_A_ events [i], type);
603}
604
605/*****************************************************************************/
606
607void inline_size
309anfds_init (ANFD *base, int count) 608anfds_init (ANFD *base, int count)
310{ 609{
311 while (count--) 610 while (count--)
312 { 611 {
313 base->head = 0; 612 base->head = 0;
… …
316 615
317 ++base; 616 ++base;
318 } 617 }
319} 618}
320 619
321static void 620void 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 (ANPENDING, 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) 621fd_event (EV_P_ int fd, int revents)
347{ 622{
348 ANFD *anfd = anfds + fd; 623 ANFD *anfd = anfds + fd;
349 struct ev_io *w; 624 ev_io *w;
350 625
351 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 626 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
352 { 627 {
353 int ev = w->events & events; 628 int ev = w->events & revents;
354 629
355 if (ev) 630 if (ev)
356 event (EV_A_ (W)w, ev); 631 ev_feed_event (EV_A_ (W)w, ev);
357 } 632 }
358} 633}
359 634
360/*****************************************************************************/ 635void
636ev_feed_fd_event (EV_P_ int fd, int revents)
637{
638 if (fd >= 0 && fd < anfdmax)
639 fd_event (EV_A_ fd, revents);
640}
361 641
362static void 642void inline_size
363fd_reify (EV_P) 643fd_reify (EV_P)
364{ 644{
365 int i; 645 int i;
366 646
367 for (i = 0; i < fdchangecnt; ++i) 647 for (i = 0; i < fdchangecnt; ++i)
368 { 648 {
369 int fd = fdchanges [i]; 649 int fd = fdchanges [i];
370 ANFD *anfd = anfds + fd; 650 ANFD *anfd = anfds + fd;
371 struct ev_io *w; 651 ev_io *w;
372 652
373 int events = 0; 653 unsigned char events = 0;
374 654
375 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 655 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
376 events |= w->events; 656 events |= (unsigned char)w->events;
377 657
658#if EV_SELECT_IS_WINSOCKET
659 if (events)
660 {
661 unsigned long argp;
662 #ifdef EV_FD_TO_WIN32_HANDLE
663 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
664 #else
665 anfd->handle = _get_osfhandle (fd);
666 #endif
667 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
668 }
669#endif
670
671 {
672 unsigned char o_events = anfd->events;
673 unsigned char o_reify = anfd->reify;
674
378 anfd->reify = 0; 675 anfd->reify = 0;
379
380 method_modify (EV_A_ fd, anfd->events, events);
381 anfd->events = events; 676 anfd->events = events;
677
678 if (o_events != events || o_reify & EV_IOFDSET)
679 backend_modify (EV_A_ fd, o_events, events);
680 }
382 } 681 }
383 682
384 fdchangecnt = 0; 683 fdchangecnt = 0;
385} 684}
386 685
387static void 686void inline_size
388fd_change (EV_P_ int fd) 687fd_change (EV_P_ int fd, int flags)
389{ 688{
390 if (anfds [fd].reify) 689 unsigned char reify = anfds [fd].reify;
391 return;
392
393 anfds [fd].reify = 1; 690 anfds [fd].reify |= flags;
394 691
692 if (expect_true (!reify))
693 {
395 ++fdchangecnt; 694 ++fdchangecnt;
396 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); 695 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
397 fdchanges [fdchangecnt - 1] = fd; 696 fdchanges [fdchangecnt - 1] = fd;
697 }
398} 698}
399 699
400static void 700void inline_speed
401fd_kill (EV_P_ int fd) 701fd_kill (EV_P_ int fd)
402{ 702{
403 struct ev_io *w; 703 ev_io *w;
404 704
405 while ((w = (struct ev_io *)anfds [fd].head)) 705 while ((w = (ev_io *)anfds [fd].head))
406 { 706 {
407 ev_io_stop (EV_A_ w); 707 ev_io_stop (EV_A_ w);
408 event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 708 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
409 } 709 }
410} 710}
411 711
412static int 712int inline_size
413fd_valid (int fd) 713fd_valid (int fd)
414{ 714{
415#ifdef WIN32 715#ifdef _WIN32
416 return !!win32_get_osfhandle (fd); 716 return _get_osfhandle (fd) != -1;
417#else 717#else
418 return fcntl (fd, F_GETFD) != -1; 718 return fcntl (fd, F_GETFD) != -1;
419#endif 719#endif
420} 720}
421 721
422/* called on EBADF to verify fds */ 722/* called on EBADF to verify fds */
423static void 723static void noinline
424fd_ebadf (EV_P) 724fd_ebadf (EV_P)
425{ 725{
426 int fd; 726 int fd;
427 727
428 for (fd = 0; fd < anfdmax; ++fd) 728 for (fd = 0; fd < anfdmax; ++fd)
… …
430 if (!fd_valid (fd) == -1 && errno == EBADF) 730 if (!fd_valid (fd) == -1 && errno == EBADF)
431 fd_kill (EV_A_ fd); 731 fd_kill (EV_A_ fd);
432} 732}
433 733
434/* called on ENOMEM in select/poll to kill some fds and retry */ 734/* called on ENOMEM in select/poll to kill some fds and retry */
435static void 735static void noinline
436fd_enomem (EV_P) 736fd_enomem (EV_P)
437{ 737{
438 int fd; 738 int fd;
439 739
440 for (fd = anfdmax; fd--; ) 740 for (fd = anfdmax; fd--; )
… …
443 fd_kill (EV_A_ fd); 743 fd_kill (EV_A_ fd);
444 return; 744 return;
445 } 745 }
446} 746}
447 747
448/* usually called after fork if method needs to re-arm all fds from scratch */ 748/* usually called after fork if backend needs to re-arm all fds from scratch */
449static void 749static void noinline
450fd_rearm_all (EV_P) 750fd_rearm_all (EV_P)
451{ 751{
452 int fd; 752 int fd;
453 753
454 /* this should be highly optimised to not do anything but set a flag */
455 for (fd = 0; fd < anfdmax; ++fd) 754 for (fd = 0; fd < anfdmax; ++fd)
456 if (anfds [fd].events) 755 if (anfds [fd].events)
457 { 756 {
458 anfds [fd].events = 0; 757 anfds [fd].events = 0;
459 fd_change (EV_A_ fd); 758 fd_change (EV_A_ fd, EV_IOFDSET | 1);
460 } 759 }
461} 760}
462 761
463/*****************************************************************************/ 762/*****************************************************************************/
464 763
465static void 764/* towards the root */
765void inline_speed
466upheap (WT *heap, int k) 766upheap (WT *heap, int k)
467{ 767{
468 WT w = heap [k]; 768 WT w = heap [k];
469 769
470 while (k && heap [k >> 1]->at > w->at) 770 for (;;)
471 { 771 {
772 int p = k >> 1;
773
774 /* maybe we could use a dummy element at heap [0]? */
775 if (!p || heap [p]->at <= w->at)
776 break;
777
472 heap [k] = heap [k >> 1]; 778 heap [k] = heap [p];
473 ((W)heap [k])->active = k + 1; 779 ev_active (heap [k]) = k;
474 k >>= 1; 780 k = p;
475 } 781 }
476 782
477 heap [k] = w; 783 heap [k] = w;
478 ((W)heap [k])->active = k + 1; 784 ev_active (heap [k]) = k;
479
480} 785}
481 786
482static void 787/* away from the root */
788void inline_speed
483downheap (WT *heap, int N, int k) 789downheap (WT *heap, int N, int k)
484{ 790{
485 WT w = heap [k]; 791 WT w = heap [k];
486 792
487 while (k < (N >> 1)) 793 for (;;)
488 { 794 {
489 int j = k << 1; 795 int c = k << 1;
490 796
491 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 797 if (c > N)
492 ++j;
493
494 if (w->at <= heap [j]->at)
495 break; 798 break;
496 799
800 c += c < N && heap [c]->at > heap [c + 1]->at
801 ? 1 : 0;
802
803 if (w->at <= heap [c]->at)
804 break;
805
497 heap [k] = heap [j]; 806 heap [k] = heap [c];
498 ((W)heap [k])->active = k + 1; 807 ev_active (heap [k]) = k;
808
499 k = j; 809 k = c;
500 } 810 }
501 811
502 heap [k] = w; 812 heap [k] = w;
503 ((W)heap [k])->active = k + 1; 813 ev_active (heap [k]) = k;
814}
815
816void inline_size
817adjustheap (WT *heap, int N, int k)
818{
819 upheap (heap, k);
820 downheap (heap, N, k);
504} 821}
505 822
506/*****************************************************************************/ 823/*****************************************************************************/
507 824
508typedef struct 825typedef struct
509{ 826{
510 WL head; 827 WL head;
511 sig_atomic_t volatile gotsig; 828 EV_ATOMIC_T gotsig;
512} ANSIG; 829} ANSIG;
513 830
514static ANSIG *signals; 831static ANSIG *signals;
515static int signalmax; 832static int signalmax;
516 833
517static int sigpipe [2]; 834static EV_ATOMIC_T gotsig;
518static sig_atomic_t volatile gotsig;
519static struct ev_io sigev;
520 835
521static void 836void inline_size
522signals_init (ANSIG *base, int count) 837signals_init (ANSIG *base, int count)
523{ 838{
524 while (count--) 839 while (count--)
525 { 840 {
526 base->head = 0; 841 base->head = 0;
… …
528 843
529 ++base; 844 ++base;
530 } 845 }
531} 846}
532 847
848/*****************************************************************************/
849
850void inline_speed
851fd_intern (int fd)
852{
853#ifdef _WIN32
854 int arg = 1;
855 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
856#else
857 fcntl (fd, F_SETFD, FD_CLOEXEC);
858 fcntl (fd, F_SETFL, O_NONBLOCK);
859#endif
860}
861
862static void noinline
863evpipe_init (EV_P)
864{
865 if (!ev_is_active (&pipeev))
866 {
867#if EV_USE_EVENTFD
868 if ((evfd = eventfd (0, 0)) >= 0)
869 {
870 evpipe [0] = -1;
871 fd_intern (evfd);
872 ev_io_set (&pipeev, evfd, EV_READ);
873 }
874 else
875#endif
876 {
877 while (pipe (evpipe))
878 syserr ("(libev) error creating signal/async pipe");
879
880 fd_intern (evpipe [0]);
881 fd_intern (evpipe [1]);
882 ev_io_set (&pipeev, evpipe [0], EV_READ);
883 }
884
885 ev_io_start (EV_A_ &pipeev);
886 ev_unref (EV_A); /* watcher should not keep loop alive */
887 }
888}
889
890void inline_size
891evpipe_write (EV_P_ EV_ATOMIC_T *flag)
892{
893 if (!*flag)
894 {
895 int old_errno = errno; /* save errno because write might clobber it */
896
897 *flag = 1;
898
899#if EV_USE_EVENTFD
900 if (evfd >= 0)
901 {
902 uint64_t counter = 1;
903 write (evfd, &counter, sizeof (uint64_t));
904 }
905 else
906#endif
907 write (evpipe [1], &old_errno, 1);
908
909 errno = old_errno;
910 }
911}
912
533static void 913static void
914pipecb (EV_P_ ev_io *iow, int revents)
915{
916#if EV_USE_EVENTFD
917 if (evfd >= 0)
918 {
919 uint64_t counter;
920 read (evfd, &counter, sizeof (uint64_t));
921 }
922 else
923#endif
924 {
925 char dummy;
926 read (evpipe [0], &dummy, 1);
927 }
928
929 if (gotsig && ev_is_default_loop (EV_A))
930 {
931 int signum;
932 gotsig = 0;
933
934 for (signum = signalmax; signum--; )
935 if (signals [signum].gotsig)
936 ev_feed_signal_event (EV_A_ signum + 1);
937 }
938
939#if EV_ASYNC_ENABLE
940 if (gotasync)
941 {
942 int i;
943 gotasync = 0;
944
945 for (i = asynccnt; i--; )
946 if (asyncs [i]->sent)
947 {
948 asyncs [i]->sent = 0;
949 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
950 }
951 }
952#endif
953}
954
955/*****************************************************************************/
956
957static void
534sighandler (int signum) 958ev_sighandler (int signum)
535{ 959{
960#if EV_MULTIPLICITY
961 struct ev_loop *loop = &default_loop_struct;
962#endif
963
536#if WIN32 964#if _WIN32
537 signal (signum, sighandler); 965 signal (signum, ev_sighandler);
538#endif 966#endif
539 967
540 signals [signum - 1].gotsig = 1; 968 signals [signum - 1].gotsig = 1;
541 969 evpipe_write (EV_A_ &gotsig);
542 if (!gotsig)
543 {
544 int old_errno = errno;
545 gotsig = 1;
546#ifdef WIN32
547 send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
548#else
549 write (sigpipe [1], &signum, 1);
550#endif
551 errno = old_errno;
552 }
553} 970}
554 971
555static void 972void noinline
556sigcb (EV_P_ struct ev_io *iow, int revents) 973ev_feed_signal_event (EV_P_ int signum)
557{ 974{
558 WL w; 975 WL w;
976
977#if EV_MULTIPLICITY
978 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
979#endif
980
559 int signum; 981 --signum;
560 982
561#ifdef WIN32 983 if (signum < 0 || signum >= signalmax)
562 recv (sigpipe [0], &revents, 1, MSG_DONTWAIT); 984 return;
563#else
564 read (sigpipe [0], &revents, 1);
565#endif
566 gotsig = 0;
567 985
568 for (signum = signalmax; signum--; )
569 if (signals [signum].gotsig)
570 {
571 signals [signum].gotsig = 0; 986 signals [signum].gotsig = 0;
572 987
573 for (w = signals [signum].head; w; w = w->next) 988 for (w = signals [signum].head; w; w = w->next)
574 event (EV_A_ (W)w, EV_SIGNAL); 989 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
575 }
576}
577
578static void
579siginit (EV_P)
580{
581#ifndef WIN32
582 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
583 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
584
585 /* rather than sort out wether we really need nb, set it */
586 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
587 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
588#endif
589
590 ev_io_set (&sigev, sigpipe [0], EV_READ);
591 ev_io_start (EV_A_ &sigev);
592 ev_unref (EV_A); /* child watcher should not keep loop alive */
593} 990}
594 991
595/*****************************************************************************/ 992/*****************************************************************************/
596 993
597static struct ev_child *childs [PID_HASHSIZE]; 994static WL childs [EV_PID_HASHSIZE];
598 995
599#ifndef WIN32 996#ifndef _WIN32
600 997
601static struct ev_signal childev; 998static ev_signal childev;
999
1000#ifndef WIFCONTINUED
1001# define WIFCONTINUED(status) 0
1002#endif
1003
1004void inline_speed
1005child_reap (EV_P_ int chain, int pid, int status)
1006{
1007 ev_child *w;
1008 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1009
1010 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1011 {
1012 if ((w->pid == pid || !w->pid)
1013 && (!traced || (w->flags & 1)))
1014 {
1015 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1016 w->rpid = pid;
1017 w->rstatus = status;
1018 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1019 }
1020 }
1021}
602 1022
603#ifndef WCONTINUED 1023#ifndef WCONTINUED
604# define WCONTINUED 0 1024# define WCONTINUED 0
605#endif 1025#endif
606 1026
607static void 1027static void
608child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
609{
610 struct ev_child *w;
611
612 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
613 if (w->pid == pid || !w->pid)
614 {
615 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
616 w->rpid = pid;
617 w->rstatus = status;
618 event (EV_A_ (W)w, EV_CHILD);
619 }
620}
621
622static void
623childcb (EV_P_ struct ev_signal *sw, int revents) 1028childcb (EV_P_ ev_signal *sw, int revents)
624{ 1029{
625 int pid, status; 1030 int pid, status;
626 1031
1032 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
627 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1033 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
628 { 1034 if (!WCONTINUED
1035 || errno != EINVAL
1036 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1037 return;
1038
629 /* make sure we are called again until all childs have been reaped */ 1039 /* make sure we are called again until all children have been reaped */
1040 /* we need to do it this way so that the callback gets called before we continue */
630 event (EV_A_ (W)sw, EV_SIGNAL); 1041 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
631 1042
632 child_reap (EV_A_ sw, pid, pid, status); 1043 child_reap (EV_A_ pid, pid, status);
1044 if (EV_PID_HASHSIZE > 1)
633 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1045 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
634 }
635} 1046}
636 1047
637#endif 1048#endif
638 1049
639/*****************************************************************************/ 1050/*****************************************************************************/
640 1051
1052#if EV_USE_PORT
1053# include "ev_port.c"
1054#endif
641#if EV_USE_KQUEUE 1055#if EV_USE_KQUEUE
642# include "ev_kqueue.c" 1056# include "ev_kqueue.c"
643#endif 1057#endif
644#if EV_USE_EPOLL 1058#if EV_USE_EPOLL
645# include "ev_epoll.c" 1059# include "ev_epoll.c"
… …
662{ 1076{
663 return EV_VERSION_MINOR; 1077 return EV_VERSION_MINOR;
664} 1078}
665 1079
666/* return true if we are running with elevated privileges and should ignore env variables */ 1080/* return true if we are running with elevated privileges and should ignore env variables */
667static int 1081int inline_size
668enable_secure (void) 1082enable_secure (void)
669{ 1083{
670#ifdef WIN32 1084#ifdef _WIN32
671 return 0; 1085 return 0;
672#else 1086#else
673 return getuid () != geteuid () 1087 return getuid () != geteuid ()
674 || getgid () != getegid (); 1088 || getgid () != getegid ();
675#endif 1089#endif
676} 1090}
677 1091
678int 1092unsigned int
679ev_method (EV_P) 1093ev_supported_backends (void)
680{ 1094{
681 return method; 1095 unsigned int flags = 0;
682}
683 1096
684static void 1097 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
685loop_init (EV_P_ int methods) 1098 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1099 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1100 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1101 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1102
1103 return flags;
1104}
1105
1106unsigned int
1107ev_recommended_backends (void)
686{ 1108{
687 if (!method) 1109 unsigned int flags = ev_supported_backends ();
1110
1111#ifndef __NetBSD__
1112 /* kqueue is borked on everything but netbsd apparently */
1113 /* it usually doesn't work correctly on anything but sockets and pipes */
1114 flags &= ~EVBACKEND_KQUEUE;
1115#endif
1116#ifdef __APPLE__
1117 // flags &= ~EVBACKEND_KQUEUE; for documentation
1118 flags &= ~EVBACKEND_POLL;
1119#endif
1120
1121 return flags;
1122}
1123
1124unsigned int
1125ev_embeddable_backends (void)
1126{
1127 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1128
1129 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1130 /* please fix it and tell me how to detect the fix */
1131 flags &= ~EVBACKEND_EPOLL;
1132
1133 return flags;
1134}
1135
1136unsigned int
1137ev_backend (EV_P)
1138{
1139 return backend;
1140}
1141
1142unsigned int
1143ev_loop_count (EV_P)
1144{
1145 return loop_count;
1146}
1147
1148void
1149ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1150{
1151 io_blocktime = interval;
1152}
1153
1154void
1155ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1156{
1157 timeout_blocktime = interval;
1158}
1159
1160static void noinline
1161loop_init (EV_P_ unsigned int flags)
1162{
1163 if (!backend)
688 { 1164 {
689#if EV_USE_MONOTONIC 1165#if EV_USE_MONOTONIC
690 { 1166 {
691 struct timespec ts; 1167 struct timespec ts;
692 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1168 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
693 have_monotonic = 1; 1169 have_monotonic = 1;
694 } 1170 }
695#endif 1171#endif
696 1172
697 rt_now = ev_time (); 1173 ev_rt_now = ev_time ();
698 mn_now = get_clock (); 1174 mn_now = get_clock ();
699 now_floor = mn_now; 1175 now_floor = mn_now;
700 rtmn_diff = rt_now - mn_now; 1176 rtmn_diff = ev_rt_now - mn_now;
701 1177
702 if (methods == EVMETHOD_AUTO) 1178 io_blocktime = 0.;
703 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1179 timeout_blocktime = 0.;
1180 backend = 0;
1181 backend_fd = -1;
1182 gotasync = 0;
1183#if EV_USE_INOTIFY
1184 fs_fd = -2;
1185#endif
1186
1187 /* pid check not overridable via env */
1188#ifndef _WIN32
1189 if (flags & EVFLAG_FORKCHECK)
1190 curpid = getpid ();
1191#endif
1192
1193 if (!(flags & EVFLAG_NOENV)
1194 && !enable_secure ()
1195 && getenv ("LIBEV_FLAGS"))
704 methods = atoi (getenv ("LIBEV_METHODS")); 1196 flags = atoi (getenv ("LIBEV_FLAGS"));
705 else
706 methods = EVMETHOD_ANY;
707 1197
708 method = 0; 1198 if (!(flags & 0x0000ffffU))
709#if EV_USE_WIN32 1199 flags |= ev_recommended_backends ();
710 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods); 1200
1201#if EV_USE_PORT
1202 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
711#endif 1203#endif
712#if EV_USE_KQUEUE 1204#if EV_USE_KQUEUE
713 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); 1205 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
714#endif 1206#endif
715#if EV_USE_EPOLL 1207#if EV_USE_EPOLL
716 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); 1208 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
717#endif 1209#endif
718#if EV_USE_POLL 1210#if EV_USE_POLL
719 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 1211 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
720#endif 1212#endif
721#if EV_USE_SELECT 1213#if EV_USE_SELECT
722 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 1214 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
723#endif 1215#endif
724 1216
725 ev_watcher_init (&sigev, sigcb); 1217 ev_init (&pipeev, pipecb);
726 ev_set_priority (&sigev, EV_MAXPRI); 1218 ev_set_priority (&pipeev, EV_MAXPRI);
727 } 1219 }
728} 1220}
729 1221
730void 1222static void noinline
731loop_destroy (EV_P) 1223loop_destroy (EV_P)
732{ 1224{
733 int i; 1225 int i;
734 1226
1227 if (ev_is_active (&pipeev))
1228 {
1229 ev_ref (EV_A); /* signal watcher */
1230 ev_io_stop (EV_A_ &pipeev);
1231
1232#if EV_USE_EVENTFD
1233 if (evfd >= 0)
1234 close (evfd);
1235#endif
1236
1237 if (evpipe [0] >= 0)
1238 {
1239 close (evpipe [0]);
1240 close (evpipe [1]);
1241 }
1242 }
1243
735#if EV_USE_WIN32 1244#if EV_USE_INOTIFY
736 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A); 1245 if (fs_fd >= 0)
1246 close (fs_fd);
1247#endif
1248
1249 if (backend_fd >= 0)
1250 close (backend_fd);
1251
1252#if EV_USE_PORT
1253 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
737#endif 1254#endif
738#if EV_USE_KQUEUE 1255#if EV_USE_KQUEUE
739 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1256 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
740#endif 1257#endif
741#if EV_USE_EPOLL 1258#if EV_USE_EPOLL
742 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1259 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
743#endif 1260#endif
744#if EV_USE_POLL 1261#if EV_USE_POLL
745 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1262 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
746#endif 1263#endif
747#if EV_USE_SELECT 1264#if EV_USE_SELECT
748 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1265 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
749#endif 1266#endif
750 1267
751 for (i = NUMPRI; i--; ) 1268 for (i = NUMPRI; i--; )
1269 {
752 array_free (pending, [i]); 1270 array_free (pending, [i]);
1271#if EV_IDLE_ENABLE
1272 array_free (idle, [i]);
1273#endif
1274 }
1275
1276 ev_free (anfds); anfdmax = 0;
753 1277
754 /* have to use the microsoft-never-gets-it-right macro */ 1278 /* have to use the microsoft-never-gets-it-right macro */
755 array_free_microshit (fdchange); 1279 array_free (fdchange, EMPTY);
756 array_free_microshit (timer); 1280 array_free (timer, EMPTY);
757 array_free_microshit (periodic); 1281#if EV_PERIODIC_ENABLE
758 array_free_microshit (idle); 1282 array_free (periodic, EMPTY);
759 array_free_microshit (prepare); 1283#endif
760 array_free_microshit (check); 1284#if EV_FORK_ENABLE
1285 array_free (fork, EMPTY);
1286#endif
1287 array_free (prepare, EMPTY);
1288 array_free (check, EMPTY);
1289#if EV_ASYNC_ENABLE
1290 array_free (async, EMPTY);
1291#endif
761 1292
762 method = 0; 1293 backend = 0;
763} 1294}
764 1295
765static void 1296#if EV_USE_INOTIFY
1297void inline_size infy_fork (EV_P);
1298#endif
1299
1300void inline_size
766loop_fork (EV_P) 1301loop_fork (EV_P)
767{ 1302{
1303#if EV_USE_PORT
1304 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1305#endif
1306#if EV_USE_KQUEUE
1307 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1308#endif
768#if EV_USE_EPOLL 1309#if EV_USE_EPOLL
769 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1310 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
770#endif 1311#endif
771#if EV_USE_KQUEUE 1312#if EV_USE_INOTIFY
772 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 1313 infy_fork (EV_A);
773#endif 1314#endif
774 1315
775 if (ev_is_active (&sigev)) 1316 if (ev_is_active (&pipeev))
776 { 1317 {
777 /* default loop */ 1318 /* this "locks" the handlers against writing to the pipe */
1319 /* while we modify the fd vars */
1320 gotsig = 1;
1321#if EV_ASYNC_ENABLE
1322 gotasync = 1;
1323#endif
778 1324
779 ev_ref (EV_A); 1325 ev_ref (EV_A);
780 ev_io_stop (EV_A_ &sigev); 1326 ev_io_stop (EV_A_ &pipeev);
1327
1328#if EV_USE_EVENTFD
1329 if (evfd >= 0)
1330 close (evfd);
1331#endif
1332
1333 if (evpipe [0] >= 0)
1334 {
781 close (sigpipe [0]); 1335 close (evpipe [0]);
782 close (sigpipe [1]); 1336 close (evpipe [1]);
1337 }
783 1338
784 while (pipe (sigpipe))
785 syserr ("(libev) error creating pipe");
786
787 siginit (EV_A); 1339 evpipe_init (EV_A);
1340 /* now iterate over everything, in case we missed something */
1341 pipecb (EV_A_ &pipeev, EV_READ);
788 } 1342 }
789 1343
790 postfork = 0; 1344 postfork = 0;
791} 1345}
792 1346
793#if EV_MULTIPLICITY 1347#if EV_MULTIPLICITY
794struct ev_loop * 1348struct ev_loop *
795ev_loop_new (int methods) 1349ev_loop_new (unsigned int flags)
796{ 1350{
797 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 1351 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
798 1352
799 memset (loop, 0, sizeof (struct ev_loop)); 1353 memset (loop, 0, sizeof (struct ev_loop));
800 1354
801 loop_init (EV_A_ methods); 1355 loop_init (EV_A_ flags);
802 1356
803 if (ev_method (EV_A)) 1357 if (ev_backend (EV_A))
804 return loop; 1358 return loop;
805 1359
806 return 0; 1360 return 0;
807} 1361}
808 1362
… …
814} 1368}
815 1369
816void 1370void
817ev_loop_fork (EV_P) 1371ev_loop_fork (EV_P)
818{ 1372{
819 postfork = 1; 1373 postfork = 1; /* must be in line with ev_default_fork */
820} 1374}
821
822#endif 1375#endif
823 1376
824#if EV_MULTIPLICITY 1377#if EV_MULTIPLICITY
825struct ev_loop default_loop_struct;
826static struct ev_loop *default_loop;
827
828struct ev_loop * 1378struct ev_loop *
1379ev_default_loop_init (unsigned int flags)
829#else 1380#else
830static int default_loop;
831
832int 1381int
1382ev_default_loop (unsigned int flags)
833#endif 1383#endif
834ev_default_loop (int methods)
835{ 1384{
836 if (sigpipe [0] == sigpipe [1])
837 if (pipe (sigpipe))
838 return 0;
839
840 if (!default_loop) 1385 if (!ev_default_loop_ptr)
841 { 1386 {
842#if EV_MULTIPLICITY 1387#if EV_MULTIPLICITY
843 struct ev_loop *loop = default_loop = &default_loop_struct; 1388 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
844#else 1389#else
845 default_loop = 1; 1390 ev_default_loop_ptr = 1;
846#endif 1391#endif
847 1392
848 loop_init (EV_A_ methods); 1393 loop_init (EV_A_ flags);
849 1394
850 if (ev_method (EV_A)) 1395 if (ev_backend (EV_A))
851 { 1396 {
852 siginit (EV_A);
853
854#ifndef WIN32 1397#ifndef _WIN32
855 ev_signal_init (&childev, childcb, SIGCHLD); 1398 ev_signal_init (&childev, childcb, SIGCHLD);
856 ev_set_priority (&childev, EV_MAXPRI); 1399 ev_set_priority (&childev, EV_MAXPRI);
857 ev_signal_start (EV_A_ &childev); 1400 ev_signal_start (EV_A_ &childev);
858 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1401 ev_unref (EV_A); /* child watcher should not keep loop alive */
859#endif 1402#endif
860 } 1403 }
861 else 1404 else
862 default_loop = 0; 1405 ev_default_loop_ptr = 0;
863 } 1406 }
864 1407
865 return default_loop; 1408 return ev_default_loop_ptr;
866} 1409}
867 1410
868void 1411void
869ev_default_destroy (void) 1412ev_default_destroy (void)
870{ 1413{
871#if EV_MULTIPLICITY 1414#if EV_MULTIPLICITY
872 struct ev_loop *loop = default_loop; 1415 struct ev_loop *loop = ev_default_loop_ptr;
873#endif 1416#endif
874 1417
875#ifndef WIN32 1418#ifndef _WIN32
876 ev_ref (EV_A); /* child watcher */ 1419 ev_ref (EV_A); /* child watcher */
877 ev_signal_stop (EV_A_ &childev); 1420 ev_signal_stop (EV_A_ &childev);
878#endif 1421#endif
879 1422
880 ev_ref (EV_A); /* signal watcher */
881 ev_io_stop (EV_A_ &sigev);
882
883 close (sigpipe [0]); sigpipe [0] = 0;
884 close (sigpipe [1]); sigpipe [1] = 0;
885
886 loop_destroy (EV_A); 1423 loop_destroy (EV_A);
887} 1424}
888 1425
889void 1426void
890ev_default_fork (void) 1427ev_default_fork (void)
891{ 1428{
892#if EV_MULTIPLICITY 1429#if EV_MULTIPLICITY
893 struct ev_loop *loop = default_loop; 1430 struct ev_loop *loop = ev_default_loop_ptr;
894#endif 1431#endif
895 1432
896 if (method) 1433 if (backend)
897 postfork = 1; 1434 postfork = 1; /* must be in line with ev_loop_fork */
898} 1435}
899 1436
900/*****************************************************************************/ 1437/*****************************************************************************/
901 1438
902static int 1439void
903any_pending (EV_P) 1440ev_invoke (EV_P_ void *w, int revents)
904{ 1441{
905 int pri; 1442 EV_CB_INVOKE ((W)w, revents);
906
907 for (pri = NUMPRI; pri--; )
908 if (pendingcnt [pri])
909 return 1;
910
911 return 0;
912} 1443}
913 1444
914static void 1445void inline_speed
915call_pending (EV_P) 1446call_pending (EV_P)
916{ 1447{
917 int pri; 1448 int pri;
918 1449
919 for (pri = NUMPRI; pri--; ) 1450 for (pri = NUMPRI; pri--; )
920 while (pendingcnt [pri]) 1451 while (pendingcnt [pri])
921 { 1452 {
922 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1453 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
923 1454
924 if (p->w) 1455 if (expect_true (p->w))
925 { 1456 {
1457 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1458
926 p->w->pending = 0; 1459 p->w->pending = 0;
927 p->w->cb (EV_A_ p->w, p->events); 1460 EV_CB_INVOKE (p->w, p->events);
928 } 1461 }
929 } 1462 }
930} 1463}
931 1464
932static void 1465#if EV_IDLE_ENABLE
1466void inline_size
1467idle_reify (EV_P)
1468{
1469 if (expect_false (idleall))
1470 {
1471 int pri;
1472
1473 for (pri = NUMPRI; pri--; )
1474 {
1475 if (pendingcnt [pri])
1476 break;
1477
1478 if (idlecnt [pri])
1479 {
1480 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1481 break;
1482 }
1483 }
1484 }
1485}
1486#endif
1487
1488void inline_size
933timers_reify (EV_P) 1489timers_reify (EV_P)
934{ 1490{
935 while (timercnt && ((WT)timers [0])->at <= mn_now) 1491 while (timercnt && ev_at (timers [1]) <= mn_now)
936 { 1492 {
937 struct ev_timer *w = timers [0]; 1493 ev_timer *w = (ev_timer *)timers [1];
938 1494
939 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1495 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
940 1496
941 /* first reschedule or stop timer */ 1497 /* first reschedule or stop timer */
942 if (w->repeat) 1498 if (w->repeat)
943 { 1499 {
944 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1500 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
945 ((WT)w)->at = mn_now + w->repeat; 1501
1502 ev_at (w) += w->repeat;
1503 if (ev_at (w) < mn_now)
1504 ev_at (w) = mn_now;
1505
946 downheap ((WT *)timers, timercnt, 0); 1506 downheap (timers, timercnt, 1);
947 } 1507 }
948 else 1508 else
949 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1509 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
950 1510
951 event (EV_A_ (W)w, EV_TIMEOUT); 1511 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
952 } 1512 }
953} 1513}
954 1514
955static void 1515#if EV_PERIODIC_ENABLE
1516void inline_size
956periodics_reify (EV_P) 1517periodics_reify (EV_P)
957{ 1518{
958 while (periodiccnt && ((WT)periodics [0])->at <= rt_now) 1519 while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
959 { 1520 {
960 struct ev_periodic *w = periodics [0]; 1521 ev_periodic *w = (ev_periodic *)periodics [1];
961 1522
962 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1523 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
963 1524
964 /* first reschedule or stop timer */ 1525 /* first reschedule or stop timer */
965 if (w->reschedule_cb) 1526 if (w->reschedule_cb)
966 { 1527 {
967 ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001); 1528 ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
968
969 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now)); 1529 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
970 downheap ((WT *)periodics, periodiccnt, 0); 1530 downheap (periodics, periodiccnt, 1);
971 } 1531 }
972 else if (w->interval) 1532 else if (w->interval)
973 { 1533 {
974 ((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; 1534 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1535 if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
975 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now)); 1536 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
976 downheap ((WT *)periodics, periodiccnt, 0); 1537 downheap (periodics, periodiccnt, 1);
977 } 1538 }
978 else 1539 else
979 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1540 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
980 1541
981 event (EV_A_ (W)w, EV_PERIODIC); 1542 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
982 } 1543 }
983} 1544}
984 1545
985static void 1546static void noinline
986periodics_reschedule (EV_P) 1547periodics_reschedule (EV_P)
987{ 1548{
988 int i; 1549 int i;
989 1550
990 /* adjust periodics after time jump */ 1551 /* adjust periodics after time jump */
991 for (i = 0; i < periodiccnt; ++i) 1552 for (i = 1; i <= periodiccnt; ++i)
992 { 1553 {
993 struct ev_periodic *w = periodics [i]; 1554 ev_periodic *w = (ev_periodic *)periodics [i];
994 1555
995 if (w->reschedule_cb) 1556 if (w->reschedule_cb)
996 ((WT)w)->at = w->reschedule_cb (w, rt_now); 1557 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
997 else if (w->interval) 1558 else if (w->interval)
998 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; 1559 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
999 } 1560 }
1000 1561
1001 /* now rebuild the heap */ 1562 /* now rebuild the heap */
1002 for (i = periodiccnt >> 1; i--; ) 1563 for (i = periodiccnt >> 1; i--; )
1003 downheap ((WT *)periodics, periodiccnt, i); 1564 downheap (periodics, periodiccnt, i);
1004} 1565}
1566#endif
1005 1567
1006inline int 1568void inline_speed
1007time_update_monotonic (EV_P) 1569time_update (EV_P_ ev_tstamp max_block)
1008{
1009 mn_now = get_clock ();
1010
1011 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1012 {
1013 rt_now = rtmn_diff + mn_now;
1014 return 0;
1015 }
1016 else
1017 {
1018 now_floor = mn_now;
1019 rt_now = ev_time ();
1020 return 1;
1021 }
1022}
1023
1024static void
1025time_update (EV_P)
1026{ 1570{
1027 int i; 1571 int i;
1028 1572
1029#if EV_USE_MONOTONIC 1573#if EV_USE_MONOTONIC
1030 if (expect_true (have_monotonic)) 1574 if (expect_true (have_monotonic))
1031 { 1575 {
1032 if (time_update_monotonic (EV_A)) 1576 ev_tstamp odiff = rtmn_diff;
1577
1578 mn_now = get_clock ();
1579
1580 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1581 /* interpolate in the meantime */
1582 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1033 { 1583 {
1034 ev_tstamp odiff = rtmn_diff; 1584 ev_rt_now = rtmn_diff + mn_now;
1585 return;
1586 }
1035 1587
1588 now_floor = mn_now;
1589 ev_rt_now = ev_time ();
1590
1036 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1591 /* loop a few times, before making important decisions.
1592 * on the choice of "4": one iteration isn't enough,
1593 * in case we get preempted during the calls to
1594 * ev_time and get_clock. a second call is almost guaranteed
1595 * to succeed in that case, though. and looping a few more times
1596 * doesn't hurt either as we only do this on time-jumps or
1597 * in the unlikely event of having been preempted here.
1598 */
1599 for (i = 4; --i; )
1037 { 1600 {
1038 rtmn_diff = rt_now - mn_now; 1601 rtmn_diff = ev_rt_now - mn_now;
1039 1602
1040 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1603 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1041 return; /* all is well */ 1604 return; /* all is well */
1042 1605
1043 rt_now = ev_time (); 1606 ev_rt_now = ev_time ();
1044 mn_now = get_clock (); 1607 mn_now = get_clock ();
1045 now_floor = mn_now; 1608 now_floor = mn_now;
1046 } 1609 }
1047 1610
1611# if EV_PERIODIC_ENABLE
1612 periodics_reschedule (EV_A);
1613# endif
1614 /* no timer adjustment, as the monotonic clock doesn't jump */
1615 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1616 }
1617 else
1618#endif
1619 {
1620 ev_rt_now = ev_time ();
1621
1622 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1623 {
1624#if EV_PERIODIC_ENABLE
1048 periodics_reschedule (EV_A); 1625 periodics_reschedule (EV_A);
1049 /* no timer adjustment, as the monotonic clock doesn't jump */ 1626#endif
1050 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */ 1627 /* adjust timers. this is easy, as the offset is the same for all of them */
1628 for (i = 1; i <= timercnt; ++i)
1629 ev_at (timers [i]) += ev_rt_now - mn_now;
1051 } 1630 }
1052 }
1053 else
1054#endif
1055 {
1056 rt_now = ev_time ();
1057 1631
1058 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1059 {
1060 periodics_reschedule (EV_A);
1061
1062 /* adjust timers. this is easy, as the offset is the same for all */
1063 for (i = 0; i < timercnt; ++i)
1064 ((WT)timers [i])->at += rt_now - mn_now;
1065 }
1066
1067 mn_now = rt_now; 1632 mn_now = ev_rt_now;
1068 } 1633 }
1069} 1634}
1070 1635
1071void 1636void
1072ev_ref (EV_P) 1637ev_ref (EV_P)
… …
1083static int loop_done; 1648static int loop_done;
1084 1649
1085void 1650void
1086ev_loop (EV_P_ int flags) 1651ev_loop (EV_P_ int flags)
1087{ 1652{
1088 double block; 1653 loop_done = EVUNLOOP_CANCEL;
1089 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1654
1655 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1090 1656
1091 do 1657 do
1092 { 1658 {
1659#ifndef _WIN32
1660 if (expect_false (curpid)) /* penalise the forking check even more */
1661 if (expect_false (getpid () != curpid))
1662 {
1663 curpid = getpid ();
1664 postfork = 1;
1665 }
1666#endif
1667
1668#if EV_FORK_ENABLE
1669 /* we might have forked, so queue fork handlers */
1670 if (expect_false (postfork))
1671 if (forkcnt)
1672 {
1673 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1674 call_pending (EV_A);
1675 }
1676#endif
1677
1093 /* queue check watchers (and execute them) */ 1678 /* queue prepare watchers (and execute them) */
1094 if (expect_false (preparecnt)) 1679 if (expect_false (preparecnt))
1095 { 1680 {
1096 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1681 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1097 call_pending (EV_A); 1682 call_pending (EV_A);
1098 } 1683 }
1099 1684
1685 if (expect_false (!activecnt))
1686 break;
1687
1100 /* we might have forked, so reify kernel state if necessary */ 1688 /* we might have forked, so reify kernel state if necessary */
1101 if (expect_false (postfork)) 1689 if (expect_false (postfork))
1102 loop_fork (EV_A); 1690 loop_fork (EV_A);
1103 1691
1104 /* update fd-related kernel structures */ 1692 /* update fd-related kernel structures */
1105 fd_reify (EV_A); 1693 fd_reify (EV_A);
1106 1694
1107 /* calculate blocking time */ 1695 /* calculate blocking time */
1696 {
1697 ev_tstamp waittime = 0.;
1698 ev_tstamp sleeptime = 0.;
1108 1699
1109 /* we only need this for !monotonic clock or timers, but as we basically 1700 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1110 always have timers, we just calculate it always */
1111#if EV_USE_MONOTONIC
1112 if (expect_true (have_monotonic))
1113 time_update_monotonic (EV_A);
1114 else
1115#endif
1116 { 1701 {
1117 rt_now = ev_time (); 1702 /* update time to cancel out callback processing overhead */
1118 mn_now = rt_now; 1703 time_update (EV_A_ 1e100);
1119 }
1120 1704
1121 if (flags & EVLOOP_NONBLOCK || idlecnt)
1122 block = 0.;
1123 else
1124 {
1125 block = MAX_BLOCKTIME; 1705 waittime = MAX_BLOCKTIME;
1126 1706
1127 if (timercnt) 1707 if (timercnt)
1128 { 1708 {
1129 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 1709 ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge;
1130 if (block > to) block = to; 1710 if (waittime > to) waittime = to;
1131 } 1711 }
1132 1712
1713#if EV_PERIODIC_ENABLE
1133 if (periodiccnt) 1714 if (periodiccnt)
1134 { 1715 {
1135 ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge; 1716 ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge;
1136 if (block > to) block = to; 1717 if (waittime > to) waittime = to;
1137 } 1718 }
1719#endif
1138 1720
1139 if (block < 0.) block = 0.; 1721 if (expect_false (waittime < timeout_blocktime))
1722 waittime = timeout_blocktime;
1723
1724 sleeptime = waittime - backend_fudge;
1725
1726 if (expect_true (sleeptime > io_blocktime))
1727 sleeptime = io_blocktime;
1728
1729 if (sleeptime)
1730 {
1731 ev_sleep (sleeptime);
1732 waittime -= sleeptime;
1733 }
1140 } 1734 }
1141 1735
1142 method_poll (EV_A_ block); 1736 ++loop_count;
1737 backend_poll (EV_A_ waittime);
1143 1738
1144 /* update rt_now, do magic */ 1739 /* update ev_rt_now, do magic */
1145 time_update (EV_A); 1740 time_update (EV_A_ waittime + sleeptime);
1741 }
1146 1742
1147 /* queue pending timers and reschedule them */ 1743 /* queue pending timers and reschedule them */
1148 timers_reify (EV_A); /* relative timers called last */ 1744 timers_reify (EV_A); /* relative timers called last */
1745#if EV_PERIODIC_ENABLE
1149 periodics_reify (EV_A); /* absolute timers called first */ 1746 periodics_reify (EV_A); /* absolute timers called first */
1747#endif
1150 1748
1749#if EV_IDLE_ENABLE
1151 /* queue idle watchers unless io or timers are pending */ 1750 /* queue idle watchers unless other events are pending */
1152 if (idlecnt && !any_pending (EV_A)) 1751 idle_reify (EV_A);
1153 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 1752#endif
1154 1753
1155 /* queue check watchers, to be executed first */ 1754 /* queue check watchers, to be executed first */
1156 if (checkcnt) 1755 if (expect_false (checkcnt))
1157 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 1756 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1158 1757
1159 call_pending (EV_A); 1758 call_pending (EV_A);
1160 } 1759 }
1161 while (activecnt && !loop_done); 1760 while (expect_true (
1761 activecnt
1762 && !loop_done
1763 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1764 ));
1162 1765
1163 if (loop_done != 2) 1766 if (loop_done == EVUNLOOP_ONE)
1164 loop_done = 0; 1767 loop_done = EVUNLOOP_CANCEL;
1165} 1768}
1166 1769
1167void 1770void
1168ev_unloop (EV_P_ int how) 1771ev_unloop (EV_P_ int how)
1169{ 1772{
1170 loop_done = how; 1773 loop_done = how;
1171} 1774}
1172 1775
1173/*****************************************************************************/ 1776/*****************************************************************************/
1174 1777
1175inline void 1778void inline_size
1176wlist_add (WL *head, WL elem) 1779wlist_add (WL *head, WL elem)
1177{ 1780{
1178 elem->next = *head; 1781 elem->next = *head;
1179 *head = elem; 1782 *head = elem;
1180} 1783}
1181 1784
1182inline void 1785void inline_size
1183wlist_del (WL *head, WL elem) 1786wlist_del (WL *head, WL elem)
1184{ 1787{
1185 while (*head) 1788 while (*head)
1186 { 1789 {
1187 if (*head == elem) 1790 if (*head == elem)
… …
1192 1795
1193 head = &(*head)->next; 1796 head = &(*head)->next;
1194 } 1797 }
1195} 1798}
1196 1799
1197inline void 1800void inline_speed
1198ev_clear_pending (EV_P_ W w) 1801clear_pending (EV_P_ W w)
1199{ 1802{
1200 if (w->pending) 1803 if (w->pending)
1201 { 1804 {
1202 pendings [ABSPRI (w)][w->pending - 1].w = 0; 1805 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1203 w->pending = 0; 1806 w->pending = 0;
1204 } 1807 }
1205} 1808}
1206 1809
1207inline void 1810int
1811ev_clear_pending (EV_P_ void *w)
1812{
1813 W w_ = (W)w;
1814 int pending = w_->pending;
1815
1816 if (expect_true (pending))
1817 {
1818 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1819 w_->pending = 0;
1820 p->w = 0;
1821 return p->events;
1822 }
1823 else
1824 return 0;
1825}
1826
1827void inline_size
1828pri_adjust (EV_P_ W w)
1829{
1830 int pri = w->priority;
1831 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1832 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1833 w->priority = pri;
1834}
1835
1836void inline_speed
1208ev_start (EV_P_ W w, int active) 1837ev_start (EV_P_ W w, int active)
1209{ 1838{
1210 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 1839 pri_adjust (EV_A_ w);
1211 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1212
1213 w->active = active; 1840 w->active = active;
1214 ev_ref (EV_A); 1841 ev_ref (EV_A);
1215} 1842}
1216 1843
1217inline void 1844void inline_size
1218ev_stop (EV_P_ W w) 1845ev_stop (EV_P_ W w)
1219{ 1846{
1220 ev_unref (EV_A); 1847 ev_unref (EV_A);
1221 w->active = 0; 1848 w->active = 0;
1222} 1849}
1223 1850
1224/*****************************************************************************/ 1851/*****************************************************************************/
1225 1852
1226void 1853void noinline
1227ev_io_start (EV_P_ struct ev_io *w) 1854ev_io_start (EV_P_ ev_io *w)
1228{ 1855{
1229 int fd = w->fd; 1856 int fd = w->fd;
1230 1857
1231 if (ev_is_active (w)) 1858 if (expect_false (ev_is_active (w)))
1232 return; 1859 return;
1233 1860
1234 assert (("ev_io_start called with negative fd", fd >= 0)); 1861 assert (("ev_io_start called with negative fd", fd >= 0));
1235 1862
1236 ev_start (EV_A_ (W)w, 1); 1863 ev_start (EV_A_ (W)w, 1);
1237 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 1864 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1238 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1865 wlist_add (&anfds[fd].head, (WL)w);
1239 1866
1240 fd_change (EV_A_ fd); 1867 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1868 w->events &= ~EV_IOFDSET;
1241} 1869}
1242 1870
1243void 1871void noinline
1244ev_io_stop (EV_P_ struct ev_io *w) 1872ev_io_stop (EV_P_ ev_io *w)
1245{ 1873{
1246 ev_clear_pending (EV_A_ (W)w); 1874 clear_pending (EV_A_ (W)w);
1247 if (!ev_is_active (w)) 1875 if (expect_false (!ev_is_active (w)))
1248 return; 1876 return;
1249 1877
1878 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1879
1250 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1880 wlist_del (&anfds[w->fd].head, (WL)w);
1251 ev_stop (EV_A_ (W)w); 1881 ev_stop (EV_A_ (W)w);
1252 1882
1253 fd_change (EV_A_ w->fd); 1883 fd_change (EV_A_ w->fd, 1);
1254} 1884}
1255 1885
1256void 1886void noinline
1257ev_timer_start (EV_P_ struct ev_timer *w) 1887ev_timer_start (EV_P_ ev_timer *w)
1258{ 1888{
1259 if (ev_is_active (w)) 1889 if (expect_false (ev_is_active (w)))
1260 return; 1890 return;
1261 1891
1262 ((WT)w)->at += mn_now; 1892 ev_at (w) += mn_now;
1263 1893
1264 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 1894 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1265 1895
1266 ev_start (EV_A_ (W)w, ++timercnt); 1896 ev_start (EV_A_ (W)w, ++timercnt);
1267 array_needsize (struct ev_timer *, timers, timermax, timercnt, (void)); 1897 array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2);
1268 timers [timercnt - 1] = w; 1898 timers [timercnt] = (WT)w;
1269 upheap ((WT *)timers, timercnt - 1); 1899 upheap (timers, timercnt);
1270 1900
1271 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 1901 /*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
1272} 1902}
1273 1903
1274void 1904void noinline
1275ev_timer_stop (EV_P_ struct ev_timer *w) 1905ev_timer_stop (EV_P_ ev_timer *w)
1276{ 1906{
1277 ev_clear_pending (EV_A_ (W)w); 1907 clear_pending (EV_A_ (W)w);
1278 if (!ev_is_active (w)) 1908 if (expect_false (!ev_is_active (w)))
1279 return; 1909 return;
1280 1910
1911 {
1912 int active = ev_active (w);
1913
1281 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 1914 assert (("internal timer heap corruption", timers [active] == (WT)w));
1282 1915
1283 if (((W)w)->active < timercnt--) 1916 if (expect_true (active < timercnt))
1284 { 1917 {
1285 timers [((W)w)->active - 1] = timers [timercnt]; 1918 timers [active] = timers [timercnt];
1286 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 1919 adjustheap (timers, timercnt, active);
1287 } 1920 }
1288 1921
1289 ((WT)w)->at = w->repeat; 1922 --timercnt;
1923 }
1924
1925 ev_at (w) -= mn_now;
1290 1926
1291 ev_stop (EV_A_ (W)w); 1927 ev_stop (EV_A_ (W)w);
1292} 1928}
1293 1929
1294void 1930void noinline
1295ev_timer_again (EV_P_ struct ev_timer *w) 1931ev_timer_again (EV_P_ ev_timer *w)
1296{ 1932{
1297 if (ev_is_active (w)) 1933 if (ev_is_active (w))
1298 { 1934 {
1299 if (w->repeat) 1935 if (w->repeat)
1300 { 1936 {
1301 ((WT)w)->at = mn_now + w->repeat; 1937 ev_at (w) = mn_now + w->repeat;
1302 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 1938 adjustheap (timers, timercnt, ev_active (w));
1303 } 1939 }
1304 else 1940 else
1305 ev_timer_stop (EV_A_ w); 1941 ev_timer_stop (EV_A_ w);
1306 } 1942 }
1307 else if (w->repeat) 1943 else if (w->repeat)
1944 {
1945 ev_at (w) = w->repeat;
1308 ev_timer_start (EV_A_ w); 1946 ev_timer_start (EV_A_ w);
1947 }
1309} 1948}
1310 1949
1311void 1950#if EV_PERIODIC_ENABLE
1951void noinline
1312ev_periodic_start (EV_P_ struct ev_periodic *w) 1952ev_periodic_start (EV_P_ ev_periodic *w)
1313{ 1953{
1314 if (ev_is_active (w)) 1954 if (expect_false (ev_is_active (w)))
1315 return; 1955 return;
1316 1956
1317 if (w->reschedule_cb) 1957 if (w->reschedule_cb)
1318 ((WT)w)->at = w->reschedule_cb (w, rt_now); 1958 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1319 else if (w->interval) 1959 else if (w->interval)
1320 { 1960 {
1321 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 1961 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1322 /* this formula differs from the one in periodic_reify because we do not always round up */ 1962 /* this formula differs from the one in periodic_reify because we do not always round up */
1323 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; 1963 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1324 } 1964 }
1965 else
1966 ev_at (w) = w->offset;
1325 1967
1326 ev_start (EV_A_ (W)w, ++periodiccnt); 1968 ev_start (EV_A_ (W)w, ++periodiccnt);
1327 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); 1969 array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2);
1328 periodics [periodiccnt - 1] = w; 1970 periodics [periodiccnt] = (WT)w;
1329 upheap ((WT *)periodics, periodiccnt - 1); 1971 upheap (periodics, periodiccnt);
1330 1972
1331 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 1973 /*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
1332} 1974}
1333 1975
1334void 1976void noinline
1335ev_periodic_stop (EV_P_ struct ev_periodic *w) 1977ev_periodic_stop (EV_P_ ev_periodic *w)
1336{ 1978{
1337 ev_clear_pending (EV_A_ (W)w); 1979 clear_pending (EV_A_ (W)w);
1338 if (!ev_is_active (w)) 1980 if (expect_false (!ev_is_active (w)))
1339 return; 1981 return;
1340 1982
1983 {
1984 int active = ev_active (w);
1985
1341 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 1986 assert (("internal periodic heap corruption", periodics [active] == (WT)w));
1342 1987
1343 if (((W)w)->active < periodiccnt--) 1988 if (expect_true (active < periodiccnt))
1344 { 1989 {
1345 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 1990 periodics [active] = periodics [periodiccnt];
1346 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 1991 adjustheap (periodics, periodiccnt, active);
1347 } 1992 }
1993
1994 --periodiccnt;
1995 }
1348 1996
1349 ev_stop (EV_A_ (W)w); 1997 ev_stop (EV_A_ (W)w);
1350} 1998}
1351 1999
1352void 2000void noinline
1353ev_periodic_again (EV_P_ struct ev_periodic *w) 2001ev_periodic_again (EV_P_ ev_periodic *w)
1354{ 2002{
2003 /* TODO: use adjustheap and recalculation */
1355 ev_periodic_stop (EV_A_ w); 2004 ev_periodic_stop (EV_A_ w);
1356 ev_periodic_start (EV_A_ w); 2005 ev_periodic_start (EV_A_ w);
1357} 2006}
1358 2007#endif
1359void
1360ev_idle_start (EV_P_ struct ev_idle *w)
1361{
1362 if (ev_is_active (w))
1363 return;
1364
1365 ev_start (EV_A_ (W)w, ++idlecnt);
1366 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1367 idles [idlecnt - 1] = w;
1368}
1369
1370void
1371ev_idle_stop (EV_P_ struct ev_idle *w)
1372{
1373 ev_clear_pending (EV_A_ (W)w);
1374 if (ev_is_active (w))
1375 return;
1376
1377 idles [((W)w)->active - 1] = idles [--idlecnt];
1378 ev_stop (EV_A_ (W)w);
1379}
1380
1381void
1382ev_prepare_start (EV_P_ struct ev_prepare *w)
1383{
1384 if (ev_is_active (w))
1385 return;
1386
1387 ev_start (EV_A_ (W)w, ++preparecnt);
1388 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1389 prepares [preparecnt - 1] = w;
1390}
1391
1392void
1393ev_prepare_stop (EV_P_ struct ev_prepare *w)
1394{
1395 ev_clear_pending (EV_A_ (W)w);
1396 if (ev_is_active (w))
1397 return;
1398
1399 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1400 ev_stop (EV_A_ (W)w);
1401}
1402
1403void
1404ev_check_start (EV_P_ struct ev_check *w)
1405{
1406 if (ev_is_active (w))
1407 return;
1408
1409 ev_start (EV_A_ (W)w, ++checkcnt);
1410 array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1411 checks [checkcnt - 1] = w;
1412}
1413
1414void
1415ev_check_stop (EV_P_ struct ev_check *w)
1416{
1417 ev_clear_pending (EV_A_ (W)w);
1418 if (ev_is_active (w))
1419 return;
1420
1421 checks [((W)w)->active - 1] = checks [--checkcnt];
1422 ev_stop (EV_A_ (W)w);
1423}
1424 2008
1425#ifndef SA_RESTART 2009#ifndef SA_RESTART
1426# define SA_RESTART 0 2010# define SA_RESTART 0
1427#endif 2011#endif
1428 2012
1429void 2013void noinline
1430ev_signal_start (EV_P_ struct ev_signal *w) 2014ev_signal_start (EV_P_ ev_signal *w)
1431{ 2015{
1432#if EV_MULTIPLICITY 2016#if EV_MULTIPLICITY
1433 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2017 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1434#endif 2018#endif
1435 if (ev_is_active (w)) 2019 if (expect_false (ev_is_active (w)))
1436 return; 2020 return;
1437 2021
1438 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2022 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1439 2023
2024 evpipe_init (EV_A);
2025
2026 {
2027#ifndef _WIN32
2028 sigset_t full, prev;
2029 sigfillset (&full);
2030 sigprocmask (SIG_SETMASK, &full, &prev);
2031#endif
2032
2033 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2034
2035#ifndef _WIN32
2036 sigprocmask (SIG_SETMASK, &prev, 0);
2037#endif
2038 }
2039
1440 ev_start (EV_A_ (W)w, 1); 2040 ev_start (EV_A_ (W)w, 1);
1441 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1442 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2041 wlist_add (&signals [w->signum - 1].head, (WL)w);
1443 2042
1444 if (!((WL)w)->next) 2043 if (!((WL)w)->next)
1445 { 2044 {
1446#if WIN32 2045#if _WIN32
1447 signal (w->signum, sighandler); 2046 signal (w->signum, ev_sighandler);
1448#else 2047#else
1449 struct sigaction sa; 2048 struct sigaction sa;
1450 sa.sa_handler = sighandler; 2049 sa.sa_handler = ev_sighandler;
1451 sigfillset (&sa.sa_mask); 2050 sigfillset (&sa.sa_mask);
1452 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2051 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1453 sigaction (w->signum, &sa, 0); 2052 sigaction (w->signum, &sa, 0);
1454#endif 2053#endif
1455 } 2054 }
1456} 2055}
1457 2056
1458void 2057void noinline
1459ev_signal_stop (EV_P_ struct ev_signal *w) 2058ev_signal_stop (EV_P_ ev_signal *w)
1460{ 2059{
1461 ev_clear_pending (EV_A_ (W)w); 2060 clear_pending (EV_A_ (W)w);
1462 if (!ev_is_active (w)) 2061 if (expect_false (!ev_is_active (w)))
1463 return; 2062 return;
1464 2063
1465 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2064 wlist_del (&signals [w->signum - 1].head, (WL)w);
1466 ev_stop (EV_A_ (W)w); 2065 ev_stop (EV_A_ (W)w);
1467 2066
1468 if (!signals [w->signum - 1].head) 2067 if (!signals [w->signum - 1].head)
1469 signal (w->signum, SIG_DFL); 2068 signal (w->signum, SIG_DFL);
1470} 2069}
1471 2070
1472void 2071void
1473ev_child_start (EV_P_ struct ev_child *w) 2072ev_child_start (EV_P_ ev_child *w)
1474{ 2073{
1475#if EV_MULTIPLICITY 2074#if EV_MULTIPLICITY
1476 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2075 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1477#endif 2076#endif
1478 if (ev_is_active (w)) 2077 if (expect_false (ev_is_active (w)))
1479 return; 2078 return;
1480 2079
1481 ev_start (EV_A_ (W)w, 1); 2080 ev_start (EV_A_ (W)w, 1);
1482 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2081 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1483} 2082}
1484 2083
1485void 2084void
1486ev_child_stop (EV_P_ struct ev_child *w) 2085ev_child_stop (EV_P_ ev_child *w)
1487{ 2086{
1488 ev_clear_pending (EV_A_ (W)w); 2087 clear_pending (EV_A_ (W)w);
1489 if (ev_is_active (w)) 2088 if (expect_false (!ev_is_active (w)))
1490 return; 2089 return;
1491 2090
1492 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2091 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1493 ev_stop (EV_A_ (W)w); 2092 ev_stop (EV_A_ (W)w);
1494} 2093}
1495 2094
2095#if EV_STAT_ENABLE
2096
2097# ifdef _WIN32
2098# undef lstat
2099# define lstat(a,b) _stati64 (a,b)
2100# endif
2101
2102#define DEF_STAT_INTERVAL 5.0074891
2103#define MIN_STAT_INTERVAL 0.1074891
2104
2105static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2106
2107#if EV_USE_INOTIFY
2108# define EV_INOTIFY_BUFSIZE 8192
2109
2110static void noinline
2111infy_add (EV_P_ ev_stat *w)
2112{
2113 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);
2114
2115 if (w->wd < 0)
2116 {
2117 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2118
2119 /* monitor some parent directory for speedup hints */
2120 /* note that exceeding the hardcoded limit is not a correctness issue, */
2121 /* but an efficiency issue only */
2122 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2123 {
2124 char path [4096];
2125 strcpy (path, w->path);
2126
2127 do
2128 {
2129 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2130 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2131
2132 char *pend = strrchr (path, '/');
2133
2134 if (!pend)
2135 break; /* whoops, no '/', complain to your admin */
2136
2137 *pend = 0;
2138 w->wd = inotify_add_watch (fs_fd, path, mask);
2139 }
2140 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2141 }
2142 }
2143 else
2144 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2145
2146 if (w->wd >= 0)
2147 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2148}
2149
2150static void noinline
2151infy_del (EV_P_ ev_stat *w)
2152{
2153 int slot;
2154 int wd = w->wd;
2155
2156 if (wd < 0)
2157 return;
2158
2159 w->wd = -2;
2160 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2161 wlist_del (&fs_hash [slot].head, (WL)w);
2162
2163 /* remove this watcher, if others are watching it, they will rearm */
2164 inotify_rm_watch (fs_fd, wd);
2165}
2166
2167static void noinline
2168infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2169{
2170 if (slot < 0)
2171 /* overflow, need to check for all hahs slots */
2172 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2173 infy_wd (EV_A_ slot, wd, ev);
2174 else
2175 {
2176 WL w_;
2177
2178 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2179 {
2180 ev_stat *w = (ev_stat *)w_;
2181 w_ = w_->next; /* lets us remove this watcher and all before it */
2182
2183 if (w->wd == wd || wd == -1)
2184 {
2185 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2186 {
2187 w->wd = -1;
2188 infy_add (EV_A_ w); /* re-add, no matter what */
2189 }
2190
2191 stat_timer_cb (EV_A_ &w->timer, 0);
2192 }
2193 }
2194 }
2195}
2196
2197static void
2198infy_cb (EV_P_ ev_io *w, int revents)
2199{
2200 char buf [EV_INOTIFY_BUFSIZE];
2201 struct inotify_event *ev = (struct inotify_event *)buf;
2202 int ofs;
2203 int len = read (fs_fd, buf, sizeof (buf));
2204
2205 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2206 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2207}
2208
2209void inline_size
2210infy_init (EV_P)
2211{
2212 if (fs_fd != -2)
2213 return;
2214
2215 fs_fd = inotify_init ();
2216
2217 if (fs_fd >= 0)
2218 {
2219 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2220 ev_set_priority (&fs_w, EV_MAXPRI);
2221 ev_io_start (EV_A_ &fs_w);
2222 }
2223}
2224
2225void inline_size
2226infy_fork (EV_P)
2227{
2228 int slot;
2229
2230 if (fs_fd < 0)
2231 return;
2232
2233 close (fs_fd);
2234 fs_fd = inotify_init ();
2235
2236 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2237 {
2238 WL w_ = fs_hash [slot].head;
2239 fs_hash [slot].head = 0;
2240
2241 while (w_)
2242 {
2243 ev_stat *w = (ev_stat *)w_;
2244 w_ = w_->next; /* lets us add this watcher */
2245
2246 w->wd = -1;
2247
2248 if (fs_fd >= 0)
2249 infy_add (EV_A_ w); /* re-add, no matter what */
2250 else
2251 ev_timer_start (EV_A_ &w->timer);
2252 }
2253
2254 }
2255}
2256
2257#endif
2258
2259void
2260ev_stat_stat (EV_P_ ev_stat *w)
2261{
2262 if (lstat (w->path, &w->attr) < 0)
2263 w->attr.st_nlink = 0;
2264 else if (!w->attr.st_nlink)
2265 w->attr.st_nlink = 1;
2266}
2267
2268static void noinline
2269stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2270{
2271 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2272
2273 /* we copy this here each the time so that */
2274 /* prev has the old value when the callback gets invoked */
2275 w->prev = w->attr;
2276 ev_stat_stat (EV_A_ w);
2277
2278 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2279 if (
2280 w->prev.st_dev != w->attr.st_dev
2281 || w->prev.st_ino != w->attr.st_ino
2282 || w->prev.st_mode != w->attr.st_mode
2283 || w->prev.st_nlink != w->attr.st_nlink
2284 || w->prev.st_uid != w->attr.st_uid
2285 || w->prev.st_gid != w->attr.st_gid
2286 || w->prev.st_rdev != w->attr.st_rdev
2287 || w->prev.st_size != w->attr.st_size
2288 || w->prev.st_atime != w->attr.st_atime
2289 || w->prev.st_mtime != w->attr.st_mtime
2290 || w->prev.st_ctime != w->attr.st_ctime
2291 ) {
2292 #if EV_USE_INOTIFY
2293 infy_del (EV_A_ w);
2294 infy_add (EV_A_ w);
2295 ev_stat_stat (EV_A_ w); /* avoid race... */
2296 #endif
2297
2298 ev_feed_event (EV_A_ w, EV_STAT);
2299 }
2300}
2301
2302void
2303ev_stat_start (EV_P_ ev_stat *w)
2304{
2305 if (expect_false (ev_is_active (w)))
2306 return;
2307
2308 /* since we use memcmp, we need to clear any padding data etc. */
2309 memset (&w->prev, 0, sizeof (ev_statdata));
2310 memset (&w->attr, 0, sizeof (ev_statdata));
2311
2312 ev_stat_stat (EV_A_ w);
2313
2314 if (w->interval < MIN_STAT_INTERVAL)
2315 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2316
2317 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2318 ev_set_priority (&w->timer, ev_priority (w));
2319
2320#if EV_USE_INOTIFY
2321 infy_init (EV_A);
2322
2323 if (fs_fd >= 0)
2324 infy_add (EV_A_ w);
2325 else
2326#endif
2327 ev_timer_start (EV_A_ &w->timer);
2328
2329 ev_start (EV_A_ (W)w, 1);
2330}
2331
2332void
2333ev_stat_stop (EV_P_ ev_stat *w)
2334{
2335 clear_pending (EV_A_ (W)w);
2336 if (expect_false (!ev_is_active (w)))
2337 return;
2338
2339#if EV_USE_INOTIFY
2340 infy_del (EV_A_ w);
2341#endif
2342 ev_timer_stop (EV_A_ &w->timer);
2343
2344 ev_stop (EV_A_ (W)w);
2345}
2346#endif
2347
2348#if EV_IDLE_ENABLE
2349void
2350ev_idle_start (EV_P_ ev_idle *w)
2351{
2352 if (expect_false (ev_is_active (w)))
2353 return;
2354
2355 pri_adjust (EV_A_ (W)w);
2356
2357 {
2358 int active = ++idlecnt [ABSPRI (w)];
2359
2360 ++idleall;
2361 ev_start (EV_A_ (W)w, active);
2362
2363 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2364 idles [ABSPRI (w)][active - 1] = w;
2365 }
2366}
2367
2368void
2369ev_idle_stop (EV_P_ ev_idle *w)
2370{
2371 clear_pending (EV_A_ (W)w);
2372 if (expect_false (!ev_is_active (w)))
2373 return;
2374
2375 {
2376 int active = ev_active (w);
2377
2378 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2379 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2380
2381 ev_stop (EV_A_ (W)w);
2382 --idleall;
2383 }
2384}
2385#endif
2386
2387void
2388ev_prepare_start (EV_P_ ev_prepare *w)
2389{
2390 if (expect_false (ev_is_active (w)))
2391 return;
2392
2393 ev_start (EV_A_ (W)w, ++preparecnt);
2394 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2395 prepares [preparecnt - 1] = w;
2396}
2397
2398void
2399ev_prepare_stop (EV_P_ ev_prepare *w)
2400{
2401 clear_pending (EV_A_ (W)w);
2402 if (expect_false (!ev_is_active (w)))
2403 return;
2404
2405 {
2406 int active = ev_active (w);
2407
2408 prepares [active - 1] = prepares [--preparecnt];
2409 ev_active (prepares [active - 1]) = active;
2410 }
2411
2412 ev_stop (EV_A_ (W)w);
2413}
2414
2415void
2416ev_check_start (EV_P_ ev_check *w)
2417{
2418 if (expect_false (ev_is_active (w)))
2419 return;
2420
2421 ev_start (EV_A_ (W)w, ++checkcnt);
2422 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2423 checks [checkcnt - 1] = w;
2424}
2425
2426void
2427ev_check_stop (EV_P_ ev_check *w)
2428{
2429 clear_pending (EV_A_ (W)w);
2430 if (expect_false (!ev_is_active (w)))
2431 return;
2432
2433 {
2434 int active = ev_active (w);
2435
2436 checks [active - 1] = checks [--checkcnt];
2437 ev_active (checks [active - 1]) = active;
2438 }
2439
2440 ev_stop (EV_A_ (W)w);
2441}
2442
2443#if EV_EMBED_ENABLE
2444void noinline
2445ev_embed_sweep (EV_P_ ev_embed *w)
2446{
2447 ev_loop (w->other, EVLOOP_NONBLOCK);
2448}
2449
2450static void
2451embed_io_cb (EV_P_ ev_io *io, int revents)
2452{
2453 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2454
2455 if (ev_cb (w))
2456 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2457 else
2458 ev_loop (w->other, EVLOOP_NONBLOCK);
2459}
2460
2461static void
2462embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2463{
2464 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2465
2466 {
2467 struct ev_loop *loop = w->other;
2468
2469 while (fdchangecnt)
2470 {
2471 fd_reify (EV_A);
2472 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2473 }
2474 }
2475}
2476
2477#if 0
2478static void
2479embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2480{
2481 ev_idle_stop (EV_A_ idle);
2482}
2483#endif
2484
2485void
2486ev_embed_start (EV_P_ ev_embed *w)
2487{
2488 if (expect_false (ev_is_active (w)))
2489 return;
2490
2491 {
2492 struct ev_loop *loop = w->other;
2493 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2494 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2495 }
2496
2497 ev_set_priority (&w->io, ev_priority (w));
2498 ev_io_start (EV_A_ &w->io);
2499
2500 ev_prepare_init (&w->prepare, embed_prepare_cb);
2501 ev_set_priority (&w->prepare, EV_MINPRI);
2502 ev_prepare_start (EV_A_ &w->prepare);
2503
2504 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2505
2506 ev_start (EV_A_ (W)w, 1);
2507}
2508
2509void
2510ev_embed_stop (EV_P_ ev_embed *w)
2511{
2512 clear_pending (EV_A_ (W)w);
2513 if (expect_false (!ev_is_active (w)))
2514 return;
2515
2516 ev_io_stop (EV_A_ &w->io);
2517 ev_prepare_stop (EV_A_ &w->prepare);
2518
2519 ev_stop (EV_A_ (W)w);
2520}
2521#endif
2522
2523#if EV_FORK_ENABLE
2524void
2525ev_fork_start (EV_P_ ev_fork *w)
2526{
2527 if (expect_false (ev_is_active (w)))
2528 return;
2529
2530 ev_start (EV_A_ (W)w, ++forkcnt);
2531 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2532 forks [forkcnt - 1] = w;
2533}
2534
2535void
2536ev_fork_stop (EV_P_ ev_fork *w)
2537{
2538 clear_pending (EV_A_ (W)w);
2539 if (expect_false (!ev_is_active (w)))
2540 return;
2541
2542 {
2543 int active = ev_active (w);
2544
2545 forks [active - 1] = forks [--forkcnt];
2546 ev_active (forks [active - 1]) = active;
2547 }
2548
2549 ev_stop (EV_A_ (W)w);
2550}
2551#endif
2552
2553#if EV_ASYNC_ENABLE
2554void
2555ev_async_start (EV_P_ ev_async *w)
2556{
2557 if (expect_false (ev_is_active (w)))
2558 return;
2559
2560 evpipe_init (EV_A);
2561
2562 ev_start (EV_A_ (W)w, ++asynccnt);
2563 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2564 asyncs [asynccnt - 1] = w;
2565}
2566
2567void
2568ev_async_stop (EV_P_ ev_async *w)
2569{
2570 clear_pending (EV_A_ (W)w);
2571 if (expect_false (!ev_is_active (w)))
2572 return;
2573
2574 {
2575 int active = ev_active (w);
2576
2577 asyncs [active - 1] = asyncs [--asynccnt];
2578 ev_active (asyncs [active - 1]) = active;
2579 }
2580
2581 ev_stop (EV_A_ (W)w);
2582}
2583
2584void
2585ev_async_send (EV_P_ ev_async *w)
2586{
2587 w->sent = 1;
2588 evpipe_write (EV_A_ &gotasync);
2589}
2590#endif
2591
1496/*****************************************************************************/ 2592/*****************************************************************************/
1497 2593
1498struct ev_once 2594struct ev_once
1499{ 2595{
1500 struct ev_io io; 2596 ev_io io;
1501 struct ev_timer to; 2597 ev_timer to;
1502 void (*cb)(int revents, void *arg); 2598 void (*cb)(int revents, void *arg);
1503 void *arg; 2599 void *arg;
1504}; 2600};
1505 2601
1506static void 2602static void
… …
1515 2611
1516 cb (revents, arg); 2612 cb (revents, arg);
1517} 2613}
1518 2614
1519static void 2615static void
1520once_cb_io (EV_P_ struct ev_io *w, int revents) 2616once_cb_io (EV_P_ ev_io *w, int revents)
1521{ 2617{
1522 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2618 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1523} 2619}
1524 2620
1525static void 2621static void
1526once_cb_to (EV_P_ struct ev_timer *w, int revents) 2622once_cb_to (EV_P_ ev_timer *w, int revents)
1527{ 2623{
1528 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2624 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1529} 2625}
1530 2626
1531void 2627void
1532ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2628ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1533{ 2629{
1534 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 2630 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1535 2631
1536 if (!once) 2632 if (expect_false (!once))
2633 {
1537 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 2634 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1538 else 2635 return;
1539 { 2636 }
2637
1540 once->cb = cb; 2638 once->cb = cb;
1541 once->arg = arg; 2639 once->arg = arg;
1542 2640
1543 ev_watcher_init (&once->io, once_cb_io); 2641 ev_init (&once->io, once_cb_io);
1544 if (fd >= 0) 2642 if (fd >= 0)
1545 { 2643 {
1546 ev_io_set (&once->io, fd, events); 2644 ev_io_set (&once->io, fd, events);
1547 ev_io_start (EV_A_ &once->io); 2645 ev_io_start (EV_A_ &once->io);
1548 } 2646 }
1549 2647
1550 ev_watcher_init (&once->to, once_cb_to); 2648 ev_init (&once->to, once_cb_to);
1551 if (timeout >= 0.) 2649 if (timeout >= 0.)
1552 { 2650 {
1553 ev_timer_set (&once->to, timeout, 0.); 2651 ev_timer_set (&once->to, timeout, 0.);
1554 ev_timer_start (EV_A_ &once->to); 2652 ev_timer_start (EV_A_ &once->to);
1555 }
1556 } 2653 }
1557} 2654}
1558 2655
2656#if EV_MULTIPLICITY
2657 #include "ev_wrap.h"
2658#endif
2659
2660#ifdef __cplusplus
2661}
2662#endif
2663

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