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Comparing libev/ev.c (file contents):
Revision 1.98 by root, Sun Nov 11 02:05:20 2007 UTC vs.
Revision 1.256 by root, Thu Jun 19 06:53:49 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 */
31 39
32#ifdef __cplusplus 40#ifdef __cplusplus
33extern "C" { 41extern "C" {
34#endif 42#endif
35 43
44/* this big block deduces configuration from config.h */
36#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
37# include "config.h" 49# include "config.h"
50# endif
38 51
39# if HAVE_CLOCK_GETTIME 52# if HAVE_CLOCK_GETTIME
40# ifndef EV_USE_MONOTONIC 53# ifndef EV_USE_MONOTONIC
41# define EV_USE_MONOTONIC 1 54# define EV_USE_MONOTONIC 1
42# endif 55# endif
43# ifndef EV_USE_REALTIME 56# ifndef EV_USE_REALTIME
44# define EV_USE_REALTIME 1 57# define EV_USE_REALTIME 1
45# endif 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
46# endif 66# endif
47 67
48# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT) 68# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
49# define EV_USE_SELECT 1 70# define EV_USE_NANOSLEEP 1
71# else
72# define EV_USE_NANOSLEEP 0
73# endif
50# endif 74# endif
51 75
52# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL) 76# ifndef EV_USE_SELECT
77# if HAVE_SELECT && HAVE_SYS_SELECT_H
53# define EV_USE_POLL 1 78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif
54# endif 82# endif
55 83
56# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL) 84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
57# define EV_USE_EPOLL 1 86# define EV_USE_POLL 1
87# else
88# define EV_USE_POLL 0
89# endif
58# endif 90# endif
59 91
60# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE) 92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
61# define EV_USE_KQUEUE 1 94# define EV_USE_EPOLL 1
95# else
96# define EV_USE_EPOLL 0
97# endif
62# 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
63 115
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
64#endif 132#endif
65 133
66#include <math.h> 134#include <math.h>
67#include <stdlib.h> 135#include <stdlib.h>
68#include <fcntl.h> 136#include <fcntl.h>
… …
75#include <sys/types.h> 143#include <sys/types.h>
76#include <time.h> 144#include <time.h>
77 145
78#include <signal.h> 146#include <signal.h>
79 147
80#ifndef WIN32
81# include <unistd.h>
82# include <sys/time.h>
83# include <sys/wait.h>
84#endif
85/**/
86
87#ifndef EV_USE_MONOTONIC
88# define EV_USE_MONOTONIC 1
89#endif
90
91#ifndef EV_USE_SELECT
92# define EV_USE_SELECT 1
93#endif
94
95#ifndef EV_USE_POLL
96# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
97#endif
98
99#ifndef EV_USE_EPOLL
100# define EV_USE_EPOLL 0
101#endif
102
103#ifndef EV_USE_KQUEUE
104# define EV_USE_KQUEUE 0
105#endif
106
107#ifndef EV_USE_WIN32
108# ifdef WIN32
109# define EV_USE_WIN32 0 /* it does not exist, use select */
110# undef EV_USE_SELECT
111# define EV_USE_SELECT 1
112# else
113# define EV_USE_WIN32 0
114# endif
115#endif
116
117#ifndef EV_USE_REALTIME
118# define EV_USE_REALTIME 1
119#endif
120
121/**/
122
123#ifndef CLOCK_MONOTONIC
124# undef EV_USE_MONOTONIC
125# define EV_USE_MONOTONIC 0
126#endif
127
128#ifndef CLOCK_REALTIME
129# undef EV_USE_REALTIME
130# define EV_USE_REALTIME 0
131#endif
132
133/**/
134
135#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
136#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
137#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
138/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
139
140#ifdef EV_H 148#ifdef EV_H
141# include EV_H 149# include EV_H
142#else 150#else
143# include "ev.h" 151# include "ev.h"
144#endif 152#endif
145 153
154#ifndef _WIN32
155# include <sys/time.h>
156# include <sys/wait.h>
157# include <unistd.h>
158#else
159# include <io.h>
160# define WIN32_LEAN_AND_MEAN
161# include <windows.h>
162# ifndef EV_SELECT_IS_WINSOCKET
163# define EV_SELECT_IS_WINSOCKET 1
164# endif
165#endif
166
167/* this block tries to deduce configuration from header-defined symbols and defaults */
168
169#ifndef EV_USE_MONOTONIC
170# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
171# define EV_USE_MONOTONIC 1
172# else
173# define EV_USE_MONOTONIC 0
174# endif
175#endif
176
177#ifndef EV_USE_REALTIME
178# define EV_USE_REALTIME 0
179#endif
180
181#ifndef EV_USE_NANOSLEEP
182# if _POSIX_C_SOURCE >= 199309L
183# define EV_USE_NANOSLEEP 1
184# else
185# define EV_USE_NANOSLEEP 0
186# endif
187#endif
188
189#ifndef EV_USE_SELECT
190# define EV_USE_SELECT 1
191#endif
192
193#ifndef EV_USE_POLL
194# ifdef _WIN32
195# define EV_USE_POLL 0
196# else
197# define EV_USE_POLL 1
198# endif
199#endif
200
201#ifndef EV_USE_EPOLL
202# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
203# define EV_USE_EPOLL 1
204# else
205# define EV_USE_EPOLL 0
206# endif
207#endif
208
209#ifndef EV_USE_KQUEUE
210# define EV_USE_KQUEUE 0
211#endif
212
213#ifndef EV_USE_PORT
214# define EV_USE_PORT 0
215#endif
216
217#ifndef EV_USE_INOTIFY
218# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
219# define EV_USE_INOTIFY 1
220# else
221# define EV_USE_INOTIFY 0
222# endif
223#endif
224
225#ifndef EV_PID_HASHSIZE
226# if EV_MINIMAL
227# define EV_PID_HASHSIZE 1
228# else
229# define EV_PID_HASHSIZE 16
230# endif
231#endif
232
233#ifndef EV_INOTIFY_HASHSIZE
234# if EV_MINIMAL
235# define EV_INOTIFY_HASHSIZE 1
236# else
237# define EV_INOTIFY_HASHSIZE 16
238# endif
239#endif
240
241#ifndef EV_USE_EVENTFD
242# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
243# define EV_USE_EVENTFD 1
244# else
245# define EV_USE_EVENTFD 0
246# endif
247#endif
248
249#if 0 /* debugging */
250# define EV_VERIFY 3
251# define EV_USE_4HEAP 1
252# define EV_HEAP_CACHE_AT 1
253#endif
254
255#ifndef EV_VERIFY
256# define EV_VERIFY !EV_MINIMAL
257#endif
258
259#ifndef EV_USE_4HEAP
260# define EV_USE_4HEAP !EV_MINIMAL
261#endif
262
263#ifndef EV_HEAP_CACHE_AT
264# define EV_HEAP_CACHE_AT !EV_MINIMAL
265#endif
266
267/* this block fixes any misconfiguration where we know we run into trouble otherwise */
268
269#ifndef CLOCK_MONOTONIC
270# undef EV_USE_MONOTONIC
271# define EV_USE_MONOTONIC 0
272#endif
273
274#ifndef CLOCK_REALTIME
275# undef EV_USE_REALTIME
276# define EV_USE_REALTIME 0
277#endif
278
279#if !EV_STAT_ENABLE
280# undef EV_USE_INOTIFY
281# define EV_USE_INOTIFY 0
282#endif
283
284#if !EV_USE_NANOSLEEP
285# ifndef _WIN32
286# include <sys/select.h>
287# endif
288#endif
289
290#if EV_USE_INOTIFY
291# include <sys/inotify.h>
292#endif
293
294#if EV_SELECT_IS_WINSOCKET
295# include <winsock.h>
296#endif
297
298#if EV_USE_EVENTFD
299/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
300# include <stdint.h>
301# ifdef __cplusplus
302extern "C" {
303# endif
304int eventfd (unsigned int initval, int flags);
305# ifdef __cplusplus
306}
307# endif
308#endif
309
310/**/
311
312#if EV_VERIFY >= 3
313# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
314#else
315# define EV_FREQUENT_CHECK do { } while (0)
316#endif
317
318/*
319 * This is used to avoid floating point rounding problems.
320 * It is added to ev_rt_now when scheduling periodics
321 * to ensure progress, time-wise, even when rounding
322 * errors are against us.
323 * This value is good at least till the year 4000.
324 * Better solutions welcome.
325 */
326#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
327
328#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
329#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
330/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
331
146#if __GNUC__ >= 3 332#if __GNUC__ >= 4
147# define expect(expr,value) __builtin_expect ((expr),(value)) 333# define expect(expr,value) __builtin_expect ((expr),(value))
148# define inline inline 334# define noinline __attribute__ ((noinline))
149#else 335#else
150# define expect(expr,value) (expr) 336# define expect(expr,value) (expr)
151# define inline static 337# define noinline
338# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
339# define inline
340# endif
152#endif 341#endif
153 342
154#define expect_false(expr) expect ((expr) != 0, 0) 343#define expect_false(expr) expect ((expr) != 0, 0)
155#define expect_true(expr) expect ((expr) != 0, 1) 344#define expect_true(expr) expect ((expr) != 0, 1)
345#define inline_size static inline
346
347#if EV_MINIMAL
348# define inline_speed static noinline
349#else
350# define inline_speed static inline
351#endif
156 352
157#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 353#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
158#define ABSPRI(w) ((w)->priority - EV_MINPRI) 354#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
159 355
356#define EMPTY /* required for microsofts broken pseudo-c compiler */
357#define EMPTY2(a,b) /* used to suppress some warnings */
358
160typedef struct ev_watcher *W; 359typedef ev_watcher *W;
161typedef struct ev_watcher_list *WL; 360typedef ev_watcher_list *WL;
162typedef struct ev_watcher_time *WT; 361typedef ev_watcher_time *WT;
163 362
363#define ev_active(w) ((W)(w))->active
364#define ev_at(w) ((WT)(w))->at
365
366#if EV_USE_MONOTONIC
367/* sig_atomic_t is used to avoid per-thread variables or locking but still */
368/* giving it a reasonably high chance of working on typical architetcures */
164static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 369static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
370#endif
165 371
166#ifdef WIN32 372#ifdef _WIN32
167# include "ev_win32.c" 373# include "ev_win32.c"
168#endif 374#endif
169 375
170/*****************************************************************************/ 376/*****************************************************************************/
171 377
172static void (*syserr_cb)(const char *msg); 378static void (*syserr_cb)(const char *msg);
173 379
380void
174void ev_set_syserr_cb (void (*cb)(const char *msg)) 381ev_set_syserr_cb (void (*cb)(const char *msg))
175{ 382{
176 syserr_cb = cb; 383 syserr_cb = cb;
177} 384}
178 385
179static void 386static void noinline
180syserr (const char *msg) 387syserr (const char *msg)
181{ 388{
182 if (!msg) 389 if (!msg)
183 msg = "(libev) system error"; 390 msg = "(libev) system error";
184 391
… …
189 perror (msg); 396 perror (msg);
190 abort (); 397 abort ();
191 } 398 }
192} 399}
193 400
401static void *
402ev_realloc_emul (void *ptr, long size)
403{
404 /* some systems, notably openbsd and darwin, fail to properly
405 * implement realloc (x, 0) (as required by both ansi c-98 and
406 * the single unix specification, so work around them here.
407 */
408
409 if (size)
410 return realloc (ptr, size);
411
412 free (ptr);
413 return 0;
414}
415
194static void *(*alloc)(void *ptr, long size); 416static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
195 417
418void
196void ev_set_allocator (void *(*cb)(void *ptr, long size)) 419ev_set_allocator (void *(*cb)(void *ptr, long size))
197{ 420{
198 alloc = cb; 421 alloc = cb;
199} 422}
200 423
201static void * 424inline_speed void *
202ev_realloc (void *ptr, long size) 425ev_realloc (void *ptr, long size)
203{ 426{
204 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 427 ptr = alloc (ptr, size);
205 428
206 if (!ptr && size) 429 if (!ptr && size)
207 { 430 {
208 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 431 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
209 abort (); 432 abort ();
… …
220typedef struct 443typedef struct
221{ 444{
222 WL head; 445 WL head;
223 unsigned char events; 446 unsigned char events;
224 unsigned char reify; 447 unsigned char reify;
448#if EV_SELECT_IS_WINSOCKET
449 SOCKET handle;
450#endif
225} ANFD; 451} ANFD;
226 452
227typedef struct 453typedef struct
228{ 454{
229 W w; 455 W w;
230 int events; 456 int events;
231} ANPENDING; 457} ANPENDING;
232 458
459#if EV_USE_INOTIFY
460/* hash table entry per inotify-id */
461typedef struct
462{
463 WL head;
464} ANFS;
465#endif
466
467/* Heap Entry */
468#if EV_HEAP_CACHE_AT
469 typedef struct {
470 ev_tstamp at;
471 WT w;
472 } ANHE;
473
474 #define ANHE_w(he) (he).w /* access watcher, read-write */
475 #define ANHE_at(he) (he).at /* access cached at, read-only */
476 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
477#else
478 typedef WT ANHE;
479
480 #define ANHE_w(he) (he)
481 #define ANHE_at(he) (he)->at
482 #define ANHE_at_cache(he)
483#endif
484
233#if EV_MULTIPLICITY 485#if EV_MULTIPLICITY
234 486
235 struct ev_loop 487 struct ev_loop
236 { 488 {
237 ev_tstamp ev_rt_now; 489 ev_tstamp ev_rt_now;
490 #define ev_rt_now ((loop)->ev_rt_now)
238 #define VAR(name,decl) decl; 491 #define VAR(name,decl) decl;
239 #include "ev_vars.h" 492 #include "ev_vars.h"
240 #undef VAR 493 #undef VAR
241 }; 494 };
242 #include "ev_wrap.h" 495 #include "ev_wrap.h"
243 496
244 struct ev_loop default_loop_struct; 497 static struct ev_loop default_loop_struct;
245 static struct ev_loop *default_loop; 498 struct ev_loop *ev_default_loop_ptr;
246 499
247#else 500#else
248 501
249 ev_tstamp ev_rt_now; 502 ev_tstamp ev_rt_now;
250 #define VAR(name,decl) static decl; 503 #define VAR(name,decl) static decl;
251 #include "ev_vars.h" 504 #include "ev_vars.h"
252 #undef VAR 505 #undef VAR
253 506
254 static int default_loop; 507 static int ev_default_loop_ptr;
255 508
256#endif 509#endif
257 510
258/*****************************************************************************/ 511/*****************************************************************************/
259 512
… …
269 gettimeofday (&tv, 0); 522 gettimeofday (&tv, 0);
270 return tv.tv_sec + tv.tv_usec * 1e-6; 523 return tv.tv_sec + tv.tv_usec * 1e-6;
271#endif 524#endif
272} 525}
273 526
274inline ev_tstamp 527ev_tstamp inline_size
275get_clock (void) 528get_clock (void)
276{ 529{
277#if EV_USE_MONOTONIC 530#if EV_USE_MONOTONIC
278 if (expect_true (have_monotonic)) 531 if (expect_true (have_monotonic))
279 { 532 {
… …
292{ 545{
293 return ev_rt_now; 546 return ev_rt_now;
294} 547}
295#endif 548#endif
296 549
297#define array_roundsize(type,n) ((n) | 4 & ~3) 550void
551ev_sleep (ev_tstamp delay)
552{
553 if (delay > 0.)
554 {
555#if EV_USE_NANOSLEEP
556 struct timespec ts;
557
558 ts.tv_sec = (time_t)delay;
559 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
560
561 nanosleep (&ts, 0);
562#elif defined(_WIN32)
563 Sleep ((unsigned long)(delay * 1e3));
564#else
565 struct timeval tv;
566
567 tv.tv_sec = (time_t)delay;
568 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
569
570 select (0, 0, 0, 0, &tv);
571#endif
572 }
573}
574
575/*****************************************************************************/
576
577#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
578
579int inline_size
580array_nextsize (int elem, int cur, int cnt)
581{
582 int ncur = cur + 1;
583
584 do
585 ncur <<= 1;
586 while (cnt > ncur);
587
588 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
589 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
590 {
591 ncur *= elem;
592 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
593 ncur = ncur - sizeof (void *) * 4;
594 ncur /= elem;
595 }
596
597 return ncur;
598}
599
600static noinline void *
601array_realloc (int elem, void *base, int *cur, int cnt)
602{
603 *cur = array_nextsize (elem, *cur, cnt);
604 return ev_realloc (base, elem * *cur);
605}
298 606
299#define array_needsize(type,base,cur,cnt,init) \ 607#define array_needsize(type,base,cur,cnt,init) \
300 if (expect_false ((cnt) > cur)) \ 608 if (expect_false ((cnt) > (cur))) \
301 { \ 609 { \
302 int newcnt = cur; \ 610 int ocur_ = (cur); \
303 do \ 611 (base) = (type *)array_realloc \
304 { \ 612 (sizeof (type), (base), &(cur), (cnt)); \
305 newcnt = array_roundsize (type, newcnt << 1); \ 613 init ((base) + (ocur_), (cur) - ocur_); \
306 } \
307 while ((cnt) > newcnt); \
308 \
309 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
310 init (base + cur, newcnt - cur); \
311 cur = newcnt; \
312 } 614 }
313 615
616#if 0
314#define array_slim(type,stem) \ 617#define array_slim(type,stem) \
315 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 618 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
316 { \ 619 { \
317 stem ## max = array_roundsize (stem ## cnt >> 1); \ 620 stem ## max = array_roundsize (stem ## cnt >> 1); \
318 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 621 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
319 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 622 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
320 } 623 }
321 624#endif
322/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
323/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
324#define array_free_microshit(stem) \
325 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
326 625
327#define array_free(stem, idx) \ 626#define array_free(stem, idx) \
328 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 627 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
329 628
330/*****************************************************************************/ 629/*****************************************************************************/
331 630
332static void 631void noinline
632ev_feed_event (EV_P_ void *w, int revents)
633{
634 W w_ = (W)w;
635 int pri = ABSPRI (w_);
636
637 if (expect_false (w_->pending))
638 pendings [pri][w_->pending - 1].events |= revents;
639 else
640 {
641 w_->pending = ++pendingcnt [pri];
642 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
643 pendings [pri][w_->pending - 1].w = w_;
644 pendings [pri][w_->pending - 1].events = revents;
645 }
646}
647
648void inline_speed
649queue_events (EV_P_ W *events, int eventcnt, int type)
650{
651 int i;
652
653 for (i = 0; i < eventcnt; ++i)
654 ev_feed_event (EV_A_ events [i], type);
655}
656
657/*****************************************************************************/
658
659void inline_size
333anfds_init (ANFD *base, int count) 660anfds_init (ANFD *base, int count)
334{ 661{
335 while (count--) 662 while (count--)
336 { 663 {
337 base->head = 0; 664 base->head = 0;
… …
340 667
341 ++base; 668 ++base;
342 } 669 }
343} 670}
344 671
345void 672void inline_speed
346ev_feed_event (EV_P_ void *w, int revents)
347{
348 W w_ = (W)w;
349
350 if (w_->pending)
351 {
352 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
353 return;
354 }
355
356 w_->pending = ++pendingcnt [ABSPRI (w_)];
357 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
358 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
359 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
360}
361
362static void
363queue_events (EV_P_ W *events, int eventcnt, int type)
364{
365 int i;
366
367 for (i = 0; i < eventcnt; ++i)
368 ev_feed_event (EV_A_ events [i], type);
369}
370
371inline void
372fd_event (EV_P_ int fd, int revents) 673fd_event (EV_P_ int fd, int revents)
373{ 674{
374 ANFD *anfd = anfds + fd; 675 ANFD *anfd = anfds + fd;
375 struct ev_io *w; 676 ev_io *w;
376 677
377 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 678 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
378 { 679 {
379 int ev = w->events & revents; 680 int ev = w->events & revents;
380 681
381 if (ev) 682 if (ev)
382 ev_feed_event (EV_A_ (W)w, ev); 683 ev_feed_event (EV_A_ (W)w, ev);
… …
384} 685}
385 686
386void 687void
387ev_feed_fd_event (EV_P_ int fd, int revents) 688ev_feed_fd_event (EV_P_ int fd, int revents)
388{ 689{
690 if (fd >= 0 && fd < anfdmax)
389 fd_event (EV_A_ fd, revents); 691 fd_event (EV_A_ fd, revents);
390} 692}
391 693
392/*****************************************************************************/ 694void inline_size
393
394static void
395fd_reify (EV_P) 695fd_reify (EV_P)
396{ 696{
397 int i; 697 int i;
398 698
399 for (i = 0; i < fdchangecnt; ++i) 699 for (i = 0; i < fdchangecnt; ++i)
400 { 700 {
401 int fd = fdchanges [i]; 701 int fd = fdchanges [i];
402 ANFD *anfd = anfds + fd; 702 ANFD *anfd = anfds + fd;
403 struct ev_io *w; 703 ev_io *w;
404 704
405 int events = 0; 705 unsigned char events = 0;
406 706
407 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 707 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
408 events |= w->events; 708 events |= (unsigned char)w->events;
409 709
710#if EV_SELECT_IS_WINSOCKET
711 if (events)
712 {
713 unsigned long arg;
714 #ifdef EV_FD_TO_WIN32_HANDLE
715 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
716 #else
717 anfd->handle = _get_osfhandle (fd);
718 #endif
719 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
720 }
721#endif
722
723 {
724 unsigned char o_events = anfd->events;
725 unsigned char o_reify = anfd->reify;
726
410 anfd->reify = 0; 727 anfd->reify = 0;
411
412 method_modify (EV_A_ fd, anfd->events, events);
413 anfd->events = events; 728 anfd->events = events;
729
730 if (o_events != events || o_reify & EV_IOFDSET)
731 backend_modify (EV_A_ fd, o_events, events);
732 }
414 } 733 }
415 734
416 fdchangecnt = 0; 735 fdchangecnt = 0;
417} 736}
418 737
419static void 738void inline_size
420fd_change (EV_P_ int fd) 739fd_change (EV_P_ int fd, int flags)
421{ 740{
422 if (anfds [fd].reify) 741 unsigned char reify = anfds [fd].reify;
423 return;
424
425 anfds [fd].reify = 1; 742 anfds [fd].reify |= flags;
426 743
744 if (expect_true (!reify))
745 {
427 ++fdchangecnt; 746 ++fdchangecnt;
428 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); 747 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
429 fdchanges [fdchangecnt - 1] = fd; 748 fdchanges [fdchangecnt - 1] = fd;
749 }
430} 750}
431 751
432static void 752void inline_speed
433fd_kill (EV_P_ int fd) 753fd_kill (EV_P_ int fd)
434{ 754{
435 struct ev_io *w; 755 ev_io *w;
436 756
437 while ((w = (struct ev_io *)anfds [fd].head)) 757 while ((w = (ev_io *)anfds [fd].head))
438 { 758 {
439 ev_io_stop (EV_A_ w); 759 ev_io_stop (EV_A_ w);
440 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 760 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
441 } 761 }
442} 762}
443 763
444static int 764int inline_size
445fd_valid (int fd) 765fd_valid (int fd)
446{ 766{
447#ifdef WIN32 767#ifdef _WIN32
448 return !!win32_get_osfhandle (fd); 768 return _get_osfhandle (fd) != -1;
449#else 769#else
450 return fcntl (fd, F_GETFD) != -1; 770 return fcntl (fd, F_GETFD) != -1;
451#endif 771#endif
452} 772}
453 773
454/* called on EBADF to verify fds */ 774/* called on EBADF to verify fds */
455static void 775static void noinline
456fd_ebadf (EV_P) 776fd_ebadf (EV_P)
457{ 777{
458 int fd; 778 int fd;
459 779
460 for (fd = 0; fd < anfdmax; ++fd) 780 for (fd = 0; fd < anfdmax; ++fd)
461 if (anfds [fd].events) 781 if (anfds [fd].events)
462 if (!fd_valid (fd) == -1 && errno == EBADF) 782 if (!fd_valid (fd) && errno == EBADF)
463 fd_kill (EV_A_ fd); 783 fd_kill (EV_A_ fd);
464} 784}
465 785
466/* called on ENOMEM in select/poll to kill some fds and retry */ 786/* called on ENOMEM in select/poll to kill some fds and retry */
467static void 787static void noinline
468fd_enomem (EV_P) 788fd_enomem (EV_P)
469{ 789{
470 int fd; 790 int fd;
471 791
472 for (fd = anfdmax; fd--; ) 792 for (fd = anfdmax; fd--; )
… …
475 fd_kill (EV_A_ fd); 795 fd_kill (EV_A_ fd);
476 return; 796 return;
477 } 797 }
478} 798}
479 799
480/* usually called after fork if method needs to re-arm all fds from scratch */ 800/* usually called after fork if backend needs to re-arm all fds from scratch */
481static void 801static void noinline
482fd_rearm_all (EV_P) 802fd_rearm_all (EV_P)
483{ 803{
484 int fd; 804 int fd;
485 805
486 /* this should be highly optimised to not do anything but set a flag */
487 for (fd = 0; fd < anfdmax; ++fd) 806 for (fd = 0; fd < anfdmax; ++fd)
488 if (anfds [fd].events) 807 if (anfds [fd].events)
489 { 808 {
490 anfds [fd].events = 0; 809 anfds [fd].events = 0;
491 fd_change (EV_A_ fd); 810 fd_change (EV_A_ fd, EV_IOFDSET | 1);
492 } 811 }
493} 812}
494 813
495/*****************************************************************************/ 814/*****************************************************************************/
496 815
497static void 816/*
498upheap (WT *heap, int k) 817 * the heap functions want a real array index. array index 0 uis guaranteed to not
499{ 818 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
500 WT w = heap [k]; 819 * the branching factor of the d-tree.
820 */
501 821
502 while (k && heap [k >> 1]->at > w->at) 822/*
503 { 823 * at the moment we allow libev the luxury of two heaps,
504 heap [k] = heap [k >> 1]; 824 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
505 ((W)heap [k])->active = k + 1; 825 * which is more cache-efficient.
506 k >>= 1; 826 * the difference is about 5% with 50000+ watchers.
507 } 827 */
828#if EV_USE_4HEAP
508 829
509 heap [k] = w; 830#define DHEAP 4
510 ((W)heap [k])->active = k + 1; 831#define HEAP0 (DHEAP - 1) /* index of first element in heap */
832#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
833#define UPHEAP_DONE(p,k) ((p) == (k))
511 834
512} 835/* away from the root */
513 836void inline_speed
514static void
515downheap (WT *heap, int N, int k) 837downheap (ANHE *heap, int N, int k)
516{ 838{
517 WT w = heap [k]; 839 ANHE he = heap [k];
840 ANHE *E = heap + N + HEAP0;
518 841
519 while (k < (N >> 1)) 842 for (;;)
520 { 843 {
521 int j = k << 1; 844 ev_tstamp minat;
845 ANHE *minpos;
846 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
522 847
523 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 848 /* find minimum child */
849 if (expect_true (pos + DHEAP - 1 < E))
524 ++j; 850 {
525 851 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
526 if (w->at <= heap [j]->at) 852 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
853 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
854 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
855 }
856 else if (pos < E)
857 {
858 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
859 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
860 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
861 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
862 }
863 else
527 break; 864 break;
528 865
866 if (ANHE_at (he) <= minat)
867 break;
868
869 heap [k] = *minpos;
870 ev_active (ANHE_w (*minpos)) = k;
871
872 k = minpos - heap;
873 }
874
875 heap [k] = he;
876 ev_active (ANHE_w (he)) = k;
877}
878
879#else /* 4HEAP */
880
881#define HEAP0 1
882#define HPARENT(k) ((k) >> 1)
883#define UPHEAP_DONE(p,k) (!(p))
884
885/* away from the root */
886void inline_speed
887downheap (ANHE *heap, int N, int k)
888{
889 ANHE he = heap [k];
890
891 for (;;)
892 {
893 int c = k << 1;
894
895 if (c > N + HEAP0 - 1)
896 break;
897
898 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
899 ? 1 : 0;
900
901 if (ANHE_at (he) <= ANHE_at (heap [c]))
902 break;
903
529 heap [k] = heap [j]; 904 heap [k] = heap [c];
530 ((W)heap [k])->active = k + 1; 905 ev_active (ANHE_w (heap [k])) = k;
906
531 k = j; 907 k = c;
532 } 908 }
533 909
534 heap [k] = w; 910 heap [k] = he;
535 ((W)heap [k])->active = k + 1; 911 ev_active (ANHE_w (he)) = k;
536} 912}
913#endif
537 914
538inline void 915/* towards the root */
539adjustheap (WT *heap, int N, int k, ev_tstamp at) 916void inline_speed
917upheap (ANHE *heap, int k)
540{ 918{
541 ev_tstamp old_at = heap [k]->at; 919 ANHE he = heap [k];
920
921 for (;;)
922 {
923 int p = HPARENT (k);
924
925 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
926 break;
927
928 heap [k] = heap [p];
929 ev_active (ANHE_w (heap [k])) = k;
930 k = p;
931 }
932
542 heap [k]->at = at; 933 heap [k] = he;
934 ev_active (ANHE_w (he)) = k;
935}
543 936
544 if (old_at < at) 937void inline_size
938adjustheap (ANHE *heap, int N, int k)
939{
940 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
941 upheap (heap, k);
942 else
545 downheap (heap, N, k); 943 downheap (heap, N, k);
546 else 944}
945
946/* rebuild the heap: this function is used only once and executed rarely */
947void inline_size
948reheap (ANHE *heap, int N)
949{
950 int i;
951
952 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
953 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
954 for (i = 0; i < N; ++i)
547 upheap (heap, k); 955 upheap (heap, i + HEAP0);
548} 956}
549 957
550/*****************************************************************************/ 958/*****************************************************************************/
551 959
552typedef struct 960typedef struct
553{ 961{
554 WL head; 962 WL head;
555 sig_atomic_t volatile gotsig; 963 EV_ATOMIC_T gotsig;
556} ANSIG; 964} ANSIG;
557 965
558static ANSIG *signals; 966static ANSIG *signals;
559static int signalmax; 967static int signalmax;
560 968
561static int sigpipe [2]; 969static EV_ATOMIC_T gotsig;
562static sig_atomic_t volatile gotsig;
563static struct ev_io sigev;
564 970
565static void 971void inline_size
566signals_init (ANSIG *base, int count) 972signals_init (ANSIG *base, int count)
567{ 973{
568 while (count--) 974 while (count--)
569 { 975 {
570 base->head = 0; 976 base->head = 0;
… …
572 978
573 ++base; 979 ++base;
574 } 980 }
575} 981}
576 982
983/*****************************************************************************/
984
985void inline_speed
986fd_intern (int fd)
987{
988#ifdef _WIN32
989 unsigned long arg = 1;
990 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
991#else
992 fcntl (fd, F_SETFD, FD_CLOEXEC);
993 fcntl (fd, F_SETFL, O_NONBLOCK);
994#endif
995}
996
997static void noinline
998evpipe_init (EV_P)
999{
1000 if (!ev_is_active (&pipeev))
1001 {
1002#if EV_USE_EVENTFD
1003 if ((evfd = eventfd (0, 0)) >= 0)
1004 {
1005 evpipe [0] = -1;
1006 fd_intern (evfd);
1007 ev_io_set (&pipeev, evfd, EV_READ);
1008 }
1009 else
1010#endif
1011 {
1012 while (pipe (evpipe))
1013 syserr ("(libev) error creating signal/async pipe");
1014
1015 fd_intern (evpipe [0]);
1016 fd_intern (evpipe [1]);
1017 ev_io_set (&pipeev, evpipe [0], EV_READ);
1018 }
1019
1020 ev_io_start (EV_A_ &pipeev);
1021 ev_unref (EV_A); /* watcher should not keep loop alive */
1022 }
1023}
1024
1025void inline_size
1026evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1027{
1028 if (!*flag)
1029 {
1030 int old_errno = errno; /* save errno because write might clobber it */
1031
1032 *flag = 1;
1033
1034#if EV_USE_EVENTFD
1035 if (evfd >= 0)
1036 {
1037 uint64_t counter = 1;
1038 write (evfd, &counter, sizeof (uint64_t));
1039 }
1040 else
1041#endif
1042 write (evpipe [1], &old_errno, 1);
1043
1044 errno = old_errno;
1045 }
1046}
1047
577static void 1048static void
1049pipecb (EV_P_ ev_io *iow, int revents)
1050{
1051#if EV_USE_EVENTFD
1052 if (evfd >= 0)
1053 {
1054 uint64_t counter;
1055 read (evfd, &counter, sizeof (uint64_t));
1056 }
1057 else
1058#endif
1059 {
1060 char dummy;
1061 read (evpipe [0], &dummy, 1);
1062 }
1063
1064 if (gotsig && ev_is_default_loop (EV_A))
1065 {
1066 int signum;
1067 gotsig = 0;
1068
1069 for (signum = signalmax; signum--; )
1070 if (signals [signum].gotsig)
1071 ev_feed_signal_event (EV_A_ signum + 1);
1072 }
1073
1074#if EV_ASYNC_ENABLE
1075 if (gotasync)
1076 {
1077 int i;
1078 gotasync = 0;
1079
1080 for (i = asynccnt; i--; )
1081 if (asyncs [i]->sent)
1082 {
1083 asyncs [i]->sent = 0;
1084 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1085 }
1086 }
1087#endif
1088}
1089
1090/*****************************************************************************/
1091
1092static void
578sighandler (int signum) 1093ev_sighandler (int signum)
579{ 1094{
1095#if EV_MULTIPLICITY
1096 struct ev_loop *loop = &default_loop_struct;
1097#endif
1098
580#if WIN32 1099#if _WIN32
581 signal (signum, sighandler); 1100 signal (signum, ev_sighandler);
582#endif 1101#endif
583 1102
584 signals [signum - 1].gotsig = 1; 1103 signals [signum - 1].gotsig = 1;
585 1104 evpipe_write (EV_A_ &gotsig);
586 if (!gotsig)
587 {
588 int old_errno = errno;
589 gotsig = 1;
590#ifdef WIN32
591 send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
592#else
593 write (sigpipe [1], &signum, 1);
594#endif
595 errno = old_errno;
596 }
597} 1105}
598 1106
599void 1107void noinline
600ev_feed_signal_event (EV_P_ int signum) 1108ev_feed_signal_event (EV_P_ int signum)
601{ 1109{
602 WL w; 1110 WL w;
603 1111
604#if EV_MULTIPLICITY 1112#if EV_MULTIPLICITY
605 assert (("feeding signal events is only supported in the default loop", loop == default_loop)); 1113 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
606#endif 1114#endif
607 1115
608 --signum; 1116 --signum;
609 1117
610 if (signum < 0 || signum >= signalmax) 1118 if (signum < 0 || signum >= signalmax)
… …
614 1122
615 for (w = signals [signum].head; w; w = w->next) 1123 for (w = signals [signum].head; w; w = w->next)
616 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1124 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
617} 1125}
618 1126
619static void
620sigcb (EV_P_ struct ev_io *iow, int revents)
621{
622 int signum;
623
624#ifdef WIN32
625 recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
626#else
627 read (sigpipe [0], &revents, 1);
628#endif
629 gotsig = 0;
630
631 for (signum = signalmax; signum--; )
632 if (signals [signum].gotsig)
633 ev_feed_signal_event (EV_A_ signum + 1);
634}
635
636static void
637siginit (EV_P)
638{
639#ifndef WIN32
640 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
641 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
642
643 /* rather than sort out wether we really need nb, set it */
644 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
645 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
646#endif
647
648 ev_io_set (&sigev, sigpipe [0], EV_READ);
649 ev_io_start (EV_A_ &sigev);
650 ev_unref (EV_A); /* child watcher should not keep loop alive */
651}
652
653/*****************************************************************************/ 1127/*****************************************************************************/
654 1128
655static struct ev_child *childs [PID_HASHSIZE]; 1129static WL childs [EV_PID_HASHSIZE];
656 1130
657#ifndef WIN32 1131#ifndef _WIN32
658 1132
659static struct ev_signal childev; 1133static ev_signal childev;
1134
1135#ifndef WIFCONTINUED
1136# define WIFCONTINUED(status) 0
1137#endif
1138
1139void inline_speed
1140child_reap (EV_P_ int chain, int pid, int status)
1141{
1142 ev_child *w;
1143 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1144
1145 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1146 {
1147 if ((w->pid == pid || !w->pid)
1148 && (!traced || (w->flags & 1)))
1149 {
1150 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1151 w->rpid = pid;
1152 w->rstatus = status;
1153 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1154 }
1155 }
1156}
660 1157
661#ifndef WCONTINUED 1158#ifndef WCONTINUED
662# define WCONTINUED 0 1159# define WCONTINUED 0
663#endif 1160#endif
664 1161
665static void 1162static void
666child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
667{
668 struct ev_child *w;
669
670 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
671 if (w->pid == pid || !w->pid)
672 {
673 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
674 w->rpid = pid;
675 w->rstatus = status;
676 ev_feed_event (EV_A_ (W)w, EV_CHILD);
677 }
678}
679
680static void
681childcb (EV_P_ struct ev_signal *sw, int revents) 1163childcb (EV_P_ ev_signal *sw, int revents)
682{ 1164{
683 int pid, status; 1165 int pid, status;
684 1166
1167 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
685 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1168 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
686 { 1169 if (!WCONTINUED
1170 || errno != EINVAL
1171 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1172 return;
1173
687 /* make sure we are called again until all childs have been reaped */ 1174 /* make sure we are called again until all children have been reaped */
1175 /* we need to do it this way so that the callback gets called before we continue */
688 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1176 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
689 1177
690 child_reap (EV_A_ sw, pid, pid, status); 1178 child_reap (EV_A_ pid, pid, status);
1179 if (EV_PID_HASHSIZE > 1)
691 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1180 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
692 }
693} 1181}
694 1182
695#endif 1183#endif
696 1184
697/*****************************************************************************/ 1185/*****************************************************************************/
698 1186
1187#if EV_USE_PORT
1188# include "ev_port.c"
1189#endif
699#if EV_USE_KQUEUE 1190#if EV_USE_KQUEUE
700# include "ev_kqueue.c" 1191# include "ev_kqueue.c"
701#endif 1192#endif
702#if EV_USE_EPOLL 1193#if EV_USE_EPOLL
703# include "ev_epoll.c" 1194# include "ev_epoll.c"
… …
720{ 1211{
721 return EV_VERSION_MINOR; 1212 return EV_VERSION_MINOR;
722} 1213}
723 1214
724/* return true if we are running with elevated privileges and should ignore env variables */ 1215/* return true if we are running with elevated privileges and should ignore env variables */
725static int 1216int inline_size
726enable_secure (void) 1217enable_secure (void)
727{ 1218{
728#ifdef WIN32 1219#ifdef _WIN32
729 return 0; 1220 return 0;
730#else 1221#else
731 return getuid () != geteuid () 1222 return getuid () != geteuid ()
732 || getgid () != getegid (); 1223 || getgid () != getegid ();
733#endif 1224#endif
734} 1225}
735 1226
736int 1227unsigned int
737ev_method (EV_P) 1228ev_supported_backends (void)
738{ 1229{
739 return method; 1230 unsigned int flags = 0;
740}
741 1231
742static void 1232 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
743loop_init (EV_P_ int methods) 1233 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1234 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1235 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1236 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1237
1238 return flags;
1239}
1240
1241unsigned int
1242ev_recommended_backends (void)
744{ 1243{
745 if (!method) 1244 unsigned int flags = ev_supported_backends ();
1245
1246#ifndef __NetBSD__
1247 /* kqueue is borked on everything but netbsd apparently */
1248 /* it usually doesn't work correctly on anything but sockets and pipes */
1249 flags &= ~EVBACKEND_KQUEUE;
1250#endif
1251#ifdef __APPLE__
1252 // flags &= ~EVBACKEND_KQUEUE; for documentation
1253 flags &= ~EVBACKEND_POLL;
1254#endif
1255
1256 return flags;
1257}
1258
1259unsigned int
1260ev_embeddable_backends (void)
1261{
1262 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1263
1264 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1265 /* please fix it and tell me how to detect the fix */
1266 flags &= ~EVBACKEND_EPOLL;
1267
1268 return flags;
1269}
1270
1271unsigned int
1272ev_backend (EV_P)
1273{
1274 return backend;
1275}
1276
1277unsigned int
1278ev_loop_count (EV_P)
1279{
1280 return loop_count;
1281}
1282
1283void
1284ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1285{
1286 io_blocktime = interval;
1287}
1288
1289void
1290ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1291{
1292 timeout_blocktime = interval;
1293}
1294
1295static void noinline
1296loop_init (EV_P_ unsigned int flags)
1297{
1298 if (!backend)
746 { 1299 {
747#if EV_USE_MONOTONIC 1300#if EV_USE_MONOTONIC
748 { 1301 {
749 struct timespec ts; 1302 struct timespec ts;
750 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1303 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
751 have_monotonic = 1; 1304 have_monotonic = 1;
752 } 1305 }
753#endif 1306#endif
754 1307
755 ev_rt_now = ev_time (); 1308 ev_rt_now = ev_time ();
756 mn_now = get_clock (); 1309 mn_now = get_clock ();
757 now_floor = mn_now; 1310 now_floor = mn_now;
758 rtmn_diff = ev_rt_now - mn_now; 1311 rtmn_diff = ev_rt_now - mn_now;
759 1312
760 if (methods == EVMETHOD_AUTO) 1313 io_blocktime = 0.;
761 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1314 timeout_blocktime = 0.;
1315 backend = 0;
1316 backend_fd = -1;
1317 gotasync = 0;
1318#if EV_USE_INOTIFY
1319 fs_fd = -2;
1320#endif
1321
1322 /* pid check not overridable via env */
1323#ifndef _WIN32
1324 if (flags & EVFLAG_FORKCHECK)
1325 curpid = getpid ();
1326#endif
1327
1328 if (!(flags & EVFLAG_NOENV)
1329 && !enable_secure ()
1330 && getenv ("LIBEV_FLAGS"))
762 methods = atoi (getenv ("LIBEV_METHODS")); 1331 flags = atoi (getenv ("LIBEV_FLAGS"));
763 else
764 methods = EVMETHOD_ANY;
765 1332
766 method = 0; 1333 if (!(flags & 0x0000ffffU))
767#if EV_USE_WIN32 1334 flags |= ev_recommended_backends ();
768 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods); 1335
1336#if EV_USE_PORT
1337 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
769#endif 1338#endif
770#if EV_USE_KQUEUE 1339#if EV_USE_KQUEUE
771 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); 1340 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
772#endif 1341#endif
773#if EV_USE_EPOLL 1342#if EV_USE_EPOLL
774 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); 1343 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
775#endif 1344#endif
776#if EV_USE_POLL 1345#if EV_USE_POLL
777 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 1346 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
778#endif 1347#endif
779#if EV_USE_SELECT 1348#if EV_USE_SELECT
780 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 1349 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
781#endif 1350#endif
782 1351
783 ev_init (&sigev, sigcb); 1352 ev_init (&pipeev, pipecb);
784 ev_set_priority (&sigev, EV_MAXPRI); 1353 ev_set_priority (&pipeev, EV_MAXPRI);
785 } 1354 }
786} 1355}
787 1356
788void 1357static void noinline
789loop_destroy (EV_P) 1358loop_destroy (EV_P)
790{ 1359{
791 int i; 1360 int i;
792 1361
1362 if (ev_is_active (&pipeev))
1363 {
1364 ev_ref (EV_A); /* signal watcher */
1365 ev_io_stop (EV_A_ &pipeev);
1366
1367#if EV_USE_EVENTFD
1368 if (evfd >= 0)
1369 close (evfd);
1370#endif
1371
1372 if (evpipe [0] >= 0)
1373 {
1374 close (evpipe [0]);
1375 close (evpipe [1]);
1376 }
1377 }
1378
793#if EV_USE_WIN32 1379#if EV_USE_INOTIFY
794 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A); 1380 if (fs_fd >= 0)
1381 close (fs_fd);
1382#endif
1383
1384 if (backend_fd >= 0)
1385 close (backend_fd);
1386
1387#if EV_USE_PORT
1388 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
795#endif 1389#endif
796#if EV_USE_KQUEUE 1390#if EV_USE_KQUEUE
797 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1391 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
798#endif 1392#endif
799#if EV_USE_EPOLL 1393#if EV_USE_EPOLL
800 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1394 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
801#endif 1395#endif
802#if EV_USE_POLL 1396#if EV_USE_POLL
803 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1397 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
804#endif 1398#endif
805#if EV_USE_SELECT 1399#if EV_USE_SELECT
806 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1400 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
807#endif 1401#endif
808 1402
809 for (i = NUMPRI; i--; ) 1403 for (i = NUMPRI; i--; )
1404 {
810 array_free (pending, [i]); 1405 array_free (pending, [i]);
1406#if EV_IDLE_ENABLE
1407 array_free (idle, [i]);
1408#endif
1409 }
1410
1411 ev_free (anfds); anfdmax = 0;
811 1412
812 /* have to use the microsoft-never-gets-it-right macro */ 1413 /* have to use the microsoft-never-gets-it-right macro */
813 array_free_microshit (fdchange); 1414 array_free (fdchange, EMPTY);
814 array_free_microshit (timer); 1415 array_free (timer, EMPTY);
815#if EV_PERIODICS 1416#if EV_PERIODIC_ENABLE
816 array_free_microshit (periodic); 1417 array_free (periodic, EMPTY);
817#endif 1418#endif
818 array_free_microshit (idle); 1419#if EV_FORK_ENABLE
819 array_free_microshit (prepare); 1420 array_free (fork, EMPTY);
820 array_free_microshit (check); 1421#endif
1422 array_free (prepare, EMPTY);
1423 array_free (check, EMPTY);
1424#if EV_ASYNC_ENABLE
1425 array_free (async, EMPTY);
1426#endif
821 1427
822 method = 0; 1428 backend = 0;
823} 1429}
824 1430
825static void 1431#if EV_USE_INOTIFY
1432void inline_size infy_fork (EV_P);
1433#endif
1434
1435void inline_size
826loop_fork (EV_P) 1436loop_fork (EV_P)
827{ 1437{
1438#if EV_USE_PORT
1439 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1440#endif
1441#if EV_USE_KQUEUE
1442 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1443#endif
828#if EV_USE_EPOLL 1444#if EV_USE_EPOLL
829 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1445 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
830#endif 1446#endif
831#if EV_USE_KQUEUE 1447#if EV_USE_INOTIFY
832 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 1448 infy_fork (EV_A);
833#endif 1449#endif
834 1450
835 if (ev_is_active (&sigev)) 1451 if (ev_is_active (&pipeev))
836 { 1452 {
837 /* default loop */ 1453 /* this "locks" the handlers against writing to the pipe */
1454 /* while we modify the fd vars */
1455 gotsig = 1;
1456#if EV_ASYNC_ENABLE
1457 gotasync = 1;
1458#endif
838 1459
839 ev_ref (EV_A); 1460 ev_ref (EV_A);
840 ev_io_stop (EV_A_ &sigev); 1461 ev_io_stop (EV_A_ &pipeev);
1462
1463#if EV_USE_EVENTFD
1464 if (evfd >= 0)
1465 close (evfd);
1466#endif
1467
1468 if (evpipe [0] >= 0)
1469 {
841 close (sigpipe [0]); 1470 close (evpipe [0]);
842 close (sigpipe [1]); 1471 close (evpipe [1]);
1472 }
843 1473
844 while (pipe (sigpipe))
845 syserr ("(libev) error creating pipe");
846
847 siginit (EV_A); 1474 evpipe_init (EV_A);
1475 /* now iterate over everything, in case we missed something */
1476 pipecb (EV_A_ &pipeev, EV_READ);
848 } 1477 }
849 1478
850 postfork = 0; 1479 postfork = 0;
851} 1480}
1481
1482#if EV_MULTIPLICITY
1483
1484struct ev_loop *
1485ev_loop_new (unsigned int flags)
1486{
1487 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1488
1489 memset (loop, 0, sizeof (struct ev_loop));
1490
1491 loop_init (EV_A_ flags);
1492
1493 if (ev_backend (EV_A))
1494 return loop;
1495
1496 return 0;
1497}
1498
1499void
1500ev_loop_destroy (EV_P)
1501{
1502 loop_destroy (EV_A);
1503 ev_free (loop);
1504}
1505
1506void
1507ev_loop_fork (EV_P)
1508{
1509 postfork = 1; /* must be in line with ev_default_fork */
1510}
1511
1512#if EV_VERIFY
1513void noinline
1514verify_watcher (EV_P_ W w)
1515{
1516 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1517
1518 if (w->pending)
1519 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1520}
1521
1522static void noinline
1523verify_heap (EV_P_ ANHE *heap, int N)
1524{
1525 int i;
1526
1527 for (i = HEAP0; i < N + HEAP0; ++i)
1528 {
1529 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1530 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1531 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1532
1533 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1534 }
1535}
1536
1537static void noinline
1538array_verify (EV_P_ W *ws, int cnt)
1539{
1540 while (cnt--)
1541 {
1542 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1543 verify_watcher (EV_A_ ws [cnt]);
1544 }
1545}
1546#endif
1547
1548void
1549ev_loop_verify (EV_P)
1550{
1551#if EV_VERIFY
1552 int i;
1553 WL w;
1554
1555 assert (activecnt >= -1);
1556
1557 assert (fdchangemax >= fdchangecnt);
1558 for (i = 0; i < fdchangecnt; ++i)
1559 assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1560
1561 assert (anfdmax >= 0);
1562 for (i = 0; i < anfdmax; ++i)
1563 for (w = anfds [i].head; w; w = w->next)
1564 {
1565 verify_watcher (EV_A_ (W)w);
1566 assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
1567 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1568 }
1569
1570 assert (timermax >= timercnt);
1571 verify_heap (EV_A_ timers, timercnt);
1572
1573#if EV_PERIODIC_ENABLE
1574 assert (periodicmax >= periodiccnt);
1575 verify_heap (EV_A_ periodics, periodiccnt);
1576#endif
1577
1578 for (i = NUMPRI; i--; )
1579 {
1580 assert (pendingmax [i] >= pendingcnt [i]);
1581#if EV_IDLE_ENABLE
1582 assert (idleall >= 0);
1583 assert (idlemax [i] >= idlecnt [i]);
1584 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1585#endif
1586 }
1587
1588#if EV_FORK_ENABLE
1589 assert (forkmax >= forkcnt);
1590 array_verify (EV_A_ (W *)forks, forkcnt);
1591#endif
1592
1593#if EV_ASYNC_ENABLE
1594 assert (asyncmax >= asynccnt);
1595 array_verify (EV_A_ (W *)asyncs, asynccnt);
1596#endif
1597
1598 assert (preparemax >= preparecnt);
1599 array_verify (EV_A_ (W *)prepares, preparecnt);
1600
1601 assert (checkmax >= checkcnt);
1602 array_verify (EV_A_ (W *)checks, checkcnt);
1603
1604# if 0
1605 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1606 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1607# endif
1608#endif
1609}
1610
1611#endif /* multiplicity */
852 1612
853#if EV_MULTIPLICITY 1613#if EV_MULTIPLICITY
854struct ev_loop * 1614struct ev_loop *
855ev_loop_new (int methods) 1615ev_default_loop_init (unsigned int flags)
856{
857 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
858
859 memset (loop, 0, sizeof (struct ev_loop));
860
861 loop_init (EV_A_ methods);
862
863 if (ev_method (EV_A))
864 return loop;
865
866 return 0;
867}
868
869void
870ev_loop_destroy (EV_P)
871{
872 loop_destroy (EV_A);
873 ev_free (loop);
874}
875
876void
877ev_loop_fork (EV_P)
878{
879 postfork = 1;
880}
881
882#endif
883
884#if EV_MULTIPLICITY
885struct ev_loop *
886#else 1616#else
887int 1617int
1618ev_default_loop (unsigned int flags)
888#endif 1619#endif
889ev_default_loop (int methods)
890{ 1620{
891 if (sigpipe [0] == sigpipe [1])
892 if (pipe (sigpipe))
893 return 0;
894
895 if (!default_loop) 1621 if (!ev_default_loop_ptr)
896 { 1622 {
897#if EV_MULTIPLICITY 1623#if EV_MULTIPLICITY
898 struct ev_loop *loop = default_loop = &default_loop_struct; 1624 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
899#else 1625#else
900 default_loop = 1; 1626 ev_default_loop_ptr = 1;
901#endif 1627#endif
902 1628
903 loop_init (EV_A_ methods); 1629 loop_init (EV_A_ flags);
904 1630
905 if (ev_method (EV_A)) 1631 if (ev_backend (EV_A))
906 { 1632 {
907 siginit (EV_A);
908
909#ifndef WIN32 1633#ifndef _WIN32
910 ev_signal_init (&childev, childcb, SIGCHLD); 1634 ev_signal_init (&childev, childcb, SIGCHLD);
911 ev_set_priority (&childev, EV_MAXPRI); 1635 ev_set_priority (&childev, EV_MAXPRI);
912 ev_signal_start (EV_A_ &childev); 1636 ev_signal_start (EV_A_ &childev);
913 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1637 ev_unref (EV_A); /* child watcher should not keep loop alive */
914#endif 1638#endif
915 } 1639 }
916 else 1640 else
917 default_loop = 0; 1641 ev_default_loop_ptr = 0;
918 } 1642 }
919 1643
920 return default_loop; 1644 return ev_default_loop_ptr;
921} 1645}
922 1646
923void 1647void
924ev_default_destroy (void) 1648ev_default_destroy (void)
925{ 1649{
926#if EV_MULTIPLICITY 1650#if EV_MULTIPLICITY
927 struct ev_loop *loop = default_loop; 1651 struct ev_loop *loop = ev_default_loop_ptr;
928#endif 1652#endif
929 1653
930#ifndef WIN32 1654#ifndef _WIN32
931 ev_ref (EV_A); /* child watcher */ 1655 ev_ref (EV_A); /* child watcher */
932 ev_signal_stop (EV_A_ &childev); 1656 ev_signal_stop (EV_A_ &childev);
933#endif 1657#endif
934 1658
935 ev_ref (EV_A); /* signal watcher */
936 ev_io_stop (EV_A_ &sigev);
937
938 close (sigpipe [0]); sigpipe [0] = 0;
939 close (sigpipe [1]); sigpipe [1] = 0;
940
941 loop_destroy (EV_A); 1659 loop_destroy (EV_A);
942} 1660}
943 1661
944void 1662void
945ev_default_fork (void) 1663ev_default_fork (void)
946{ 1664{
947#if EV_MULTIPLICITY 1665#if EV_MULTIPLICITY
948 struct ev_loop *loop = default_loop; 1666 struct ev_loop *loop = ev_default_loop_ptr;
949#endif 1667#endif
950 1668
951 if (method) 1669 if (backend)
952 postfork = 1; 1670 postfork = 1; /* must be in line with ev_loop_fork */
953} 1671}
954 1672
955/*****************************************************************************/ 1673/*****************************************************************************/
956 1674
957static int 1675void
958any_pending (EV_P) 1676ev_invoke (EV_P_ void *w, int revents)
959{ 1677{
960 int pri; 1678 EV_CB_INVOKE ((W)w, revents);
961
962 for (pri = NUMPRI; pri--; )
963 if (pendingcnt [pri])
964 return 1;
965
966 return 0;
967} 1679}
968 1680
969static void 1681void inline_speed
970call_pending (EV_P) 1682call_pending (EV_P)
971{ 1683{
972 int pri; 1684 int pri;
973 1685
974 for (pri = NUMPRI; pri--; ) 1686 for (pri = NUMPRI; pri--; )
975 while (pendingcnt [pri]) 1687 while (pendingcnt [pri])
976 { 1688 {
977 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1689 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
978 1690
979 if (p->w) 1691 if (expect_true (p->w))
980 { 1692 {
1693 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1694
981 p->w->pending = 0; 1695 p->w->pending = 0;
982 EV_CB_INVOKE (p->w, p->events); 1696 EV_CB_INVOKE (p->w, p->events);
1697 EV_FREQUENT_CHECK;
983 } 1698 }
984 } 1699 }
985} 1700}
986 1701
987static void 1702#if EV_IDLE_ENABLE
1703void inline_size
1704idle_reify (EV_P)
1705{
1706 if (expect_false (idleall))
1707 {
1708 int pri;
1709
1710 for (pri = NUMPRI; pri--; )
1711 {
1712 if (pendingcnt [pri])
1713 break;
1714
1715 if (idlecnt [pri])
1716 {
1717 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1718 break;
1719 }
1720 }
1721 }
1722}
1723#endif
1724
1725void inline_size
988timers_reify (EV_P) 1726timers_reify (EV_P)
989{ 1727{
1728 EV_FREQUENT_CHECK;
1729
990 while (timercnt && ((WT)timers [0])->at <= mn_now) 1730 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
991 { 1731 {
992 struct ev_timer *w = timers [0]; 1732 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
993 1733
994 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1734 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
995 1735
996 /* first reschedule or stop timer */ 1736 /* first reschedule or stop timer */
997 if (w->repeat) 1737 if (w->repeat)
998 { 1738 {
1739 ev_at (w) += w->repeat;
1740 if (ev_at (w) < mn_now)
1741 ev_at (w) = mn_now;
1742
999 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1743 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1000 1744
1001 ((WT)w)->at += w->repeat; 1745 ANHE_at_cache (timers [HEAP0]);
1002 if (((WT)w)->at < mn_now)
1003 ((WT)w)->at = mn_now;
1004
1005 downheap ((WT *)timers, timercnt, 0); 1746 downheap (timers, timercnt, HEAP0);
1006 } 1747 }
1007 else 1748 else
1008 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1749 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1009 1750
1751 EV_FREQUENT_CHECK;
1010 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 1752 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1011 } 1753 }
1012} 1754}
1013 1755
1014#if EV_PERIODICS 1756#if EV_PERIODIC_ENABLE
1015static void 1757void inline_size
1016periodics_reify (EV_P) 1758periodics_reify (EV_P)
1017{ 1759{
1760 EV_FREQUENT_CHECK;
1761
1018 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 1762 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1019 { 1763 {
1020 struct ev_periodic *w = periodics [0]; 1764 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1021 1765
1022 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1766 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1023 1767
1024 /* first reschedule or stop timer */ 1768 /* first reschedule or stop timer */
1025 if (w->reschedule_cb) 1769 if (w->reschedule_cb)
1026 { 1770 {
1027 ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 1771 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1028 1772
1029 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 1773 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1774
1775 ANHE_at_cache (periodics [HEAP0]);
1030 downheap ((WT *)periodics, periodiccnt, 0); 1776 downheap (periodics, periodiccnt, HEAP0);
1031 } 1777 }
1032 else if (w->interval) 1778 else if (w->interval)
1033 { 1779 {
1034 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; 1780 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1035 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now)); 1781 /* if next trigger time is not sufficiently in the future, put it there */
1782 /* this might happen because of floating point inexactness */
1783 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1784 {
1785 ev_at (w) += w->interval;
1786
1787 /* if interval is unreasonably low we might still have a time in the past */
1788 /* so correct this. this will make the periodic very inexact, but the user */
1789 /* has effectively asked to get triggered more often than possible */
1790 if (ev_at (w) < ev_rt_now)
1791 ev_at (w) = ev_rt_now;
1792 }
1793
1794 ANHE_at_cache (periodics [HEAP0]);
1036 downheap ((WT *)periodics, periodiccnt, 0); 1795 downheap (periodics, periodiccnt, HEAP0);
1037 } 1796 }
1038 else 1797 else
1039 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1798 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1040 1799
1800 EV_FREQUENT_CHECK;
1041 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 1801 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1042 } 1802 }
1043} 1803}
1044 1804
1045static void 1805static void noinline
1046periodics_reschedule (EV_P) 1806periodics_reschedule (EV_P)
1047{ 1807{
1048 int i; 1808 int i;
1049 1809
1050 /* adjust periodics after time jump */ 1810 /* adjust periodics after time jump */
1051 for (i = 0; i < periodiccnt; ++i) 1811 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1052 { 1812 {
1053 struct ev_periodic *w = periodics [i]; 1813 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1054 1814
1055 if (w->reschedule_cb) 1815 if (w->reschedule_cb)
1056 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 1816 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1057 else if (w->interval) 1817 else if (w->interval)
1058 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 1818 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1819
1820 ANHE_at_cache (periodics [i]);
1821 }
1822
1823 reheap (periodics, periodiccnt);
1824}
1825#endif
1826
1827void inline_speed
1828time_update (EV_P_ ev_tstamp max_block)
1829{
1830 int i;
1831
1832#if EV_USE_MONOTONIC
1833 if (expect_true (have_monotonic))
1059 } 1834 {
1835 ev_tstamp odiff = rtmn_diff;
1060 1836
1061 /* now rebuild the heap */
1062 for (i = periodiccnt >> 1; i--; )
1063 downheap ((WT *)periodics, periodiccnt, i);
1064}
1065#endif
1066
1067inline int
1068time_update_monotonic (EV_P)
1069{
1070 mn_now = get_clock (); 1837 mn_now = get_clock ();
1071 1838
1839 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1840 /* interpolate in the meantime */
1072 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 1841 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1073 { 1842 {
1074 ev_rt_now = rtmn_diff + mn_now; 1843 ev_rt_now = rtmn_diff + mn_now;
1075 return 0; 1844 return;
1076 } 1845 }
1077 else 1846
1078 {
1079 now_floor = mn_now; 1847 now_floor = mn_now;
1080 ev_rt_now = ev_time (); 1848 ev_rt_now = ev_time ();
1081 return 1;
1082 }
1083}
1084 1849
1085static void 1850 /* loop a few times, before making important decisions.
1086time_update (EV_P) 1851 * on the choice of "4": one iteration isn't enough,
1087{ 1852 * in case we get preempted during the calls to
1088 int i; 1853 * ev_time and get_clock. a second call is almost guaranteed
1089 1854 * to succeed in that case, though. and looping a few more times
1090#if EV_USE_MONOTONIC 1855 * doesn't hurt either as we only do this on time-jumps or
1091 if (expect_true (have_monotonic)) 1856 * in the unlikely event of having been preempted here.
1092 { 1857 */
1093 if (time_update_monotonic (EV_A)) 1858 for (i = 4; --i; )
1094 { 1859 {
1095 ev_tstamp odiff = rtmn_diff; 1860 rtmn_diff = ev_rt_now - mn_now;
1096 1861
1097 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1862 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1863 return; /* all is well */
1864
1865 ev_rt_now = ev_time ();
1866 mn_now = get_clock ();
1867 now_floor = mn_now;
1868 }
1869
1870# if EV_PERIODIC_ENABLE
1871 periodics_reschedule (EV_A);
1872# endif
1873 /* no timer adjustment, as the monotonic clock doesn't jump */
1874 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1875 }
1876 else
1877#endif
1878 {
1879 ev_rt_now = ev_time ();
1880
1881 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1882 {
1883#if EV_PERIODIC_ENABLE
1884 periodics_reschedule (EV_A);
1885#endif
1886 /* adjust timers. this is easy, as the offset is the same for all of them */
1887 for (i = 0; i < timercnt; ++i)
1098 { 1888 {
1099 rtmn_diff = ev_rt_now - mn_now; 1889 ANHE *he = timers + i + HEAP0;
1100 1890 ANHE_w (*he)->at += ev_rt_now - mn_now;
1101 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1891 ANHE_at_cache (*he);
1102 return; /* all is well */
1103
1104 ev_rt_now = ev_time ();
1105 mn_now = get_clock ();
1106 now_floor = mn_now;
1107 } 1892 }
1108
1109# if EV_PERIODICS
1110 periodics_reschedule (EV_A);
1111# endif
1112 /* no timer adjustment, as the monotonic clock doesn't jump */
1113 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1114 } 1893 }
1115 }
1116 else
1117#endif
1118 {
1119 ev_rt_now = ev_time ();
1120
1121 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1122 {
1123#if EV_PERIODICS
1124 periodics_reschedule (EV_A);
1125#endif
1126
1127 /* adjust timers. this is easy, as the offset is the same for all */
1128 for (i = 0; i < timercnt; ++i)
1129 ((WT)timers [i])->at += ev_rt_now - mn_now;
1130 }
1131 1894
1132 mn_now = ev_rt_now; 1895 mn_now = ev_rt_now;
1133 } 1896 }
1134} 1897}
1135 1898
… …
1148static int loop_done; 1911static int loop_done;
1149 1912
1150void 1913void
1151ev_loop (EV_P_ int flags) 1914ev_loop (EV_P_ int flags)
1152{ 1915{
1153 double block; 1916 loop_done = EVUNLOOP_CANCEL;
1154 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1917
1918 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1155 1919
1156 do 1920 do
1157 { 1921 {
1922#if EV_VERIFY >= 2
1923 ev_loop_verify (EV_A);
1924#endif
1925
1926#ifndef _WIN32
1927 if (expect_false (curpid)) /* penalise the forking check even more */
1928 if (expect_false (getpid () != curpid))
1929 {
1930 curpid = getpid ();
1931 postfork = 1;
1932 }
1933#endif
1934
1935#if EV_FORK_ENABLE
1936 /* we might have forked, so queue fork handlers */
1937 if (expect_false (postfork))
1938 if (forkcnt)
1939 {
1940 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1941 call_pending (EV_A);
1942 }
1943#endif
1944
1158 /* queue check watchers (and execute them) */ 1945 /* queue prepare watchers (and execute them) */
1159 if (expect_false (preparecnt)) 1946 if (expect_false (preparecnt))
1160 { 1947 {
1161 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1948 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1162 call_pending (EV_A); 1949 call_pending (EV_A);
1163 } 1950 }
1164 1951
1952 if (expect_false (!activecnt))
1953 break;
1954
1165 /* we might have forked, so reify kernel state if necessary */ 1955 /* we might have forked, so reify kernel state if necessary */
1166 if (expect_false (postfork)) 1956 if (expect_false (postfork))
1167 loop_fork (EV_A); 1957 loop_fork (EV_A);
1168 1958
1169 /* update fd-related kernel structures */ 1959 /* update fd-related kernel structures */
1170 fd_reify (EV_A); 1960 fd_reify (EV_A);
1171 1961
1172 /* calculate blocking time */ 1962 /* calculate blocking time */
1963 {
1964 ev_tstamp waittime = 0.;
1965 ev_tstamp sleeptime = 0.;
1173 1966
1174 /* we only need this for !monotonic clock or timers, but as we basically 1967 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1175 always have timers, we just calculate it always */
1176#if EV_USE_MONOTONIC
1177 if (expect_true (have_monotonic))
1178 time_update_monotonic (EV_A);
1179 else
1180#endif
1181 { 1968 {
1182 ev_rt_now = ev_time (); 1969 /* update time to cancel out callback processing overhead */
1183 mn_now = ev_rt_now; 1970 time_update (EV_A_ 1e100);
1184 }
1185 1971
1186 if (flags & EVLOOP_NONBLOCK || idlecnt)
1187 block = 0.;
1188 else
1189 {
1190 block = MAX_BLOCKTIME; 1972 waittime = MAX_BLOCKTIME;
1191 1973
1192 if (timercnt) 1974 if (timercnt)
1193 { 1975 {
1194 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 1976 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1195 if (block > to) block = to; 1977 if (waittime > to) waittime = to;
1196 } 1978 }
1197 1979
1198#if EV_PERIODICS 1980#if EV_PERIODIC_ENABLE
1199 if (periodiccnt) 1981 if (periodiccnt)
1200 { 1982 {
1201 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; 1983 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1202 if (block > to) block = to; 1984 if (waittime > to) waittime = to;
1203 } 1985 }
1204#endif 1986#endif
1205 1987
1206 if (block < 0.) block = 0.; 1988 if (expect_false (waittime < timeout_blocktime))
1989 waittime = timeout_blocktime;
1990
1991 sleeptime = waittime - backend_fudge;
1992
1993 if (expect_true (sleeptime > io_blocktime))
1994 sleeptime = io_blocktime;
1995
1996 if (sleeptime)
1997 {
1998 ev_sleep (sleeptime);
1999 waittime -= sleeptime;
2000 }
1207 } 2001 }
1208 2002
1209 method_poll (EV_A_ block); 2003 ++loop_count;
2004 backend_poll (EV_A_ waittime);
1210 2005
1211 /* update ev_rt_now, do magic */ 2006 /* update ev_rt_now, do magic */
1212 time_update (EV_A); 2007 time_update (EV_A_ waittime + sleeptime);
2008 }
1213 2009
1214 /* queue pending timers and reschedule them */ 2010 /* queue pending timers and reschedule them */
1215 timers_reify (EV_A); /* relative timers called last */ 2011 timers_reify (EV_A); /* relative timers called last */
1216#if EV_PERIODICS 2012#if EV_PERIODIC_ENABLE
1217 periodics_reify (EV_A); /* absolute timers called first */ 2013 periodics_reify (EV_A); /* absolute timers called first */
1218#endif 2014#endif
1219 2015
2016#if EV_IDLE_ENABLE
1220 /* queue idle watchers unless io or timers are pending */ 2017 /* queue idle watchers unless other events are pending */
1221 if (idlecnt && !any_pending (EV_A)) 2018 idle_reify (EV_A);
1222 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2019#endif
1223 2020
1224 /* queue check watchers, to be executed first */ 2021 /* queue check watchers, to be executed first */
1225 if (checkcnt) 2022 if (expect_false (checkcnt))
1226 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2023 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1227 2024
1228 call_pending (EV_A); 2025 call_pending (EV_A);
1229 } 2026 }
1230 while (activecnt && !loop_done); 2027 while (expect_true (
2028 activecnt
2029 && !loop_done
2030 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2031 ));
1231 2032
1232 if (loop_done != 2) 2033 if (loop_done == EVUNLOOP_ONE)
1233 loop_done = 0; 2034 loop_done = EVUNLOOP_CANCEL;
1234} 2035}
1235 2036
1236void 2037void
1237ev_unloop (EV_P_ int how) 2038ev_unloop (EV_P_ int how)
1238{ 2039{
1239 loop_done = how; 2040 loop_done = how;
1240} 2041}
1241 2042
1242/*****************************************************************************/ 2043/*****************************************************************************/
1243 2044
1244inline void 2045void inline_size
1245wlist_add (WL *head, WL elem) 2046wlist_add (WL *head, WL elem)
1246{ 2047{
1247 elem->next = *head; 2048 elem->next = *head;
1248 *head = elem; 2049 *head = elem;
1249} 2050}
1250 2051
1251inline void 2052void inline_size
1252wlist_del (WL *head, WL elem) 2053wlist_del (WL *head, WL elem)
1253{ 2054{
1254 while (*head) 2055 while (*head)
1255 { 2056 {
1256 if (*head == elem) 2057 if (*head == elem)
… …
1261 2062
1262 head = &(*head)->next; 2063 head = &(*head)->next;
1263 } 2064 }
1264} 2065}
1265 2066
1266inline void 2067void inline_speed
1267ev_clear_pending (EV_P_ W w) 2068clear_pending (EV_P_ W w)
1268{ 2069{
1269 if (w->pending) 2070 if (w->pending)
1270 { 2071 {
1271 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2072 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1272 w->pending = 0; 2073 w->pending = 0;
1273 } 2074 }
1274} 2075}
1275 2076
1276inline void 2077int
2078ev_clear_pending (EV_P_ void *w)
2079{
2080 W w_ = (W)w;
2081 int pending = w_->pending;
2082
2083 if (expect_true (pending))
2084 {
2085 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2086 w_->pending = 0;
2087 p->w = 0;
2088 return p->events;
2089 }
2090 else
2091 return 0;
2092}
2093
2094void inline_size
2095pri_adjust (EV_P_ W w)
2096{
2097 int pri = w->priority;
2098 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2099 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2100 w->priority = pri;
2101}
2102
2103void inline_speed
1277ev_start (EV_P_ W w, int active) 2104ev_start (EV_P_ W w, int active)
1278{ 2105{
1279 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2106 pri_adjust (EV_A_ w);
1280 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1281
1282 w->active = active; 2107 w->active = active;
1283 ev_ref (EV_A); 2108 ev_ref (EV_A);
1284} 2109}
1285 2110
1286inline void 2111void inline_size
1287ev_stop (EV_P_ W w) 2112ev_stop (EV_P_ W w)
1288{ 2113{
1289 ev_unref (EV_A); 2114 ev_unref (EV_A);
1290 w->active = 0; 2115 w->active = 0;
1291} 2116}
1292 2117
1293/*****************************************************************************/ 2118/*****************************************************************************/
1294 2119
1295void 2120void noinline
1296ev_io_start (EV_P_ struct ev_io *w) 2121ev_io_start (EV_P_ ev_io *w)
1297{ 2122{
1298 int fd = w->fd; 2123 int fd = w->fd;
1299 2124
1300 if (ev_is_active (w)) 2125 if (expect_false (ev_is_active (w)))
1301 return; 2126 return;
1302 2127
1303 assert (("ev_io_start called with negative fd", fd >= 0)); 2128 assert (("ev_io_start called with negative fd", fd >= 0));
2129
2130 EV_FREQUENT_CHECK;
1304 2131
1305 ev_start (EV_A_ (W)w, 1); 2132 ev_start (EV_A_ (W)w, 1);
1306 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2133 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1307 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2134 wlist_add (&anfds[fd].head, (WL)w);
1308 2135
1309 fd_change (EV_A_ fd); 2136 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1310} 2137 w->events &= ~EV_IOFDSET;
1311 2138
1312void 2139 EV_FREQUENT_CHECK;
2140}
2141
2142void noinline
1313ev_io_stop (EV_P_ struct ev_io *w) 2143ev_io_stop (EV_P_ ev_io *w)
1314{ 2144{
1315 ev_clear_pending (EV_A_ (W)w); 2145 clear_pending (EV_A_ (W)w);
1316 if (!ev_is_active (w)) 2146 if (expect_false (!ev_is_active (w)))
1317 return; 2147 return;
1318 2148
1319 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2149 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1320 2150
2151 EV_FREQUENT_CHECK;
2152
1321 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2153 wlist_del (&anfds[w->fd].head, (WL)w);
1322 ev_stop (EV_A_ (W)w); 2154 ev_stop (EV_A_ (W)w);
1323 2155
1324 fd_change (EV_A_ w->fd); 2156 fd_change (EV_A_ w->fd, 1);
1325}
1326 2157
1327void 2158 EV_FREQUENT_CHECK;
2159}
2160
2161void noinline
1328ev_timer_start (EV_P_ struct ev_timer *w) 2162ev_timer_start (EV_P_ ev_timer *w)
1329{ 2163{
2164 if (expect_false (ev_is_active (w)))
2165 return;
2166
2167 ev_at (w) += mn_now;
2168
2169 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2170
2171 EV_FREQUENT_CHECK;
2172
2173 ++timercnt;
2174 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2175 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2176 ANHE_w (timers [ev_active (w)]) = (WT)w;
2177 ANHE_at_cache (timers [ev_active (w)]);
2178 upheap (timers, ev_active (w));
2179
2180 EV_FREQUENT_CHECK;
2181
2182 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2183}
2184
2185void noinline
2186ev_timer_stop (EV_P_ ev_timer *w)
2187{
2188 clear_pending (EV_A_ (W)w);
2189 if (expect_false (!ev_is_active (w)))
2190 return;
2191
2192 EV_FREQUENT_CHECK;
2193
2194 {
2195 int active = ev_active (w);
2196
2197 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2198
2199 --timercnt;
2200
2201 if (expect_true (active < timercnt + HEAP0))
2202 {
2203 timers [active] = timers [timercnt + HEAP0];
2204 adjustheap (timers, timercnt, active);
2205 }
2206 }
2207
2208 EV_FREQUENT_CHECK;
2209
2210 ev_at (w) -= mn_now;
2211
2212 ev_stop (EV_A_ (W)w);
2213}
2214
2215void noinline
2216ev_timer_again (EV_P_ ev_timer *w)
2217{
2218 EV_FREQUENT_CHECK;
2219
1330 if (ev_is_active (w)) 2220 if (ev_is_active (w))
1331 return;
1332
1333 ((WT)w)->at += mn_now;
1334
1335 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1336
1337 ev_start (EV_A_ (W)w, ++timercnt);
1338 array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
1339 timers [timercnt - 1] = w;
1340 upheap ((WT *)timers, timercnt - 1);
1341
1342 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1343}
1344
1345void
1346ev_timer_stop (EV_P_ struct ev_timer *w)
1347{
1348 ev_clear_pending (EV_A_ (W)w);
1349 if (!ev_is_active (w))
1350 return;
1351
1352 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1353
1354 if (((W)w)->active < timercnt--)
1355 {
1356 timers [((W)w)->active - 1] = timers [timercnt];
1357 downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1358 }
1359
1360 ((WT)w)->at -= mn_now;
1361
1362 ev_stop (EV_A_ (W)w);
1363}
1364
1365void
1366ev_timer_again (EV_P_ struct ev_timer *w)
1367{
1368 if (ev_is_active (w))
1369 { 2221 {
1370 if (w->repeat) 2222 if (w->repeat)
1371 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat); 2223 {
2224 ev_at (w) = mn_now + w->repeat;
2225 ANHE_at_cache (timers [ev_active (w)]);
2226 adjustheap (timers, timercnt, ev_active (w));
2227 }
1372 else 2228 else
1373 ev_timer_stop (EV_A_ w); 2229 ev_timer_stop (EV_A_ w);
1374 } 2230 }
1375 else if (w->repeat) 2231 else if (w->repeat)
2232 {
2233 ev_at (w) = w->repeat;
1376 ev_timer_start (EV_A_ w); 2234 ev_timer_start (EV_A_ w);
1377} 2235 }
1378 2236
2237 EV_FREQUENT_CHECK;
2238}
2239
1379#if EV_PERIODICS 2240#if EV_PERIODIC_ENABLE
1380void 2241void noinline
1381ev_periodic_start (EV_P_ struct ev_periodic *w) 2242ev_periodic_start (EV_P_ ev_periodic *w)
1382{ 2243{
1383 if (ev_is_active (w)) 2244 if (expect_false (ev_is_active (w)))
1384 return; 2245 return;
1385 2246
1386 if (w->reschedule_cb) 2247 if (w->reschedule_cb)
1387 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2248 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1388 else if (w->interval) 2249 else if (w->interval)
1389 { 2250 {
1390 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2251 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1391 /* this formula differs from the one in periodic_reify because we do not always round up */ 2252 /* this formula differs from the one in periodic_reify because we do not always round up */
1392 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2253 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1393 } 2254 }
2255 else
2256 ev_at (w) = w->offset;
1394 2257
2258 EV_FREQUENT_CHECK;
2259
2260 ++periodiccnt;
1395 ev_start (EV_A_ (W)w, ++periodiccnt); 2261 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1396 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); 2262 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1397 periodics [periodiccnt - 1] = w; 2263 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1398 upheap ((WT *)periodics, periodiccnt - 1); 2264 ANHE_at_cache (periodics [ev_active (w)]);
2265 upheap (periodics, ev_active (w));
1399 2266
2267 EV_FREQUENT_CHECK;
2268
1400 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2269 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1401} 2270}
1402 2271
1403void 2272void noinline
1404ev_periodic_stop (EV_P_ struct ev_periodic *w) 2273ev_periodic_stop (EV_P_ ev_periodic *w)
1405{ 2274{
1406 ev_clear_pending (EV_A_ (W)w); 2275 clear_pending (EV_A_ (W)w);
1407 if (!ev_is_active (w)) 2276 if (expect_false (!ev_is_active (w)))
1408 return; 2277 return;
1409 2278
2279 EV_FREQUENT_CHECK;
2280
2281 {
2282 int active = ev_active (w);
2283
1410 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2284 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1411 2285
1412 if (((W)w)->active < periodiccnt--) 2286 --periodiccnt;
2287
2288 if (expect_true (active < periodiccnt + HEAP0))
1413 { 2289 {
1414 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2290 periodics [active] = periodics [periodiccnt + HEAP0];
1415 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2291 adjustheap (periodics, periodiccnt, active);
1416 } 2292 }
2293 }
2294
2295 EV_FREQUENT_CHECK;
1417 2296
1418 ev_stop (EV_A_ (W)w); 2297 ev_stop (EV_A_ (W)w);
1419} 2298}
1420 2299
1421void 2300void noinline
1422ev_periodic_again (EV_P_ struct ev_periodic *w) 2301ev_periodic_again (EV_P_ ev_periodic *w)
1423{ 2302{
1424 /* TODO: use adjustheap and recalculation */ 2303 /* TODO: use adjustheap and recalculation */
1425 ev_periodic_stop (EV_A_ w); 2304 ev_periodic_stop (EV_A_ w);
1426 ev_periodic_start (EV_A_ w); 2305 ev_periodic_start (EV_A_ w);
1427} 2306}
1428#endif 2307#endif
1429 2308
1430void
1431ev_idle_start (EV_P_ struct ev_idle *w)
1432{
1433 if (ev_is_active (w))
1434 return;
1435
1436 ev_start (EV_A_ (W)w, ++idlecnt);
1437 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1438 idles [idlecnt - 1] = w;
1439}
1440
1441void
1442ev_idle_stop (EV_P_ struct ev_idle *w)
1443{
1444 ev_clear_pending (EV_A_ (W)w);
1445 if (ev_is_active (w))
1446 return;
1447
1448 idles [((W)w)->active - 1] = idles [--idlecnt];
1449 ev_stop (EV_A_ (W)w);
1450}
1451
1452void
1453ev_prepare_start (EV_P_ struct ev_prepare *w)
1454{
1455 if (ev_is_active (w))
1456 return;
1457
1458 ev_start (EV_A_ (W)w, ++preparecnt);
1459 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1460 prepares [preparecnt - 1] = w;
1461}
1462
1463void
1464ev_prepare_stop (EV_P_ struct ev_prepare *w)
1465{
1466 ev_clear_pending (EV_A_ (W)w);
1467 if (ev_is_active (w))
1468 return;
1469
1470 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1471 ev_stop (EV_A_ (W)w);
1472}
1473
1474void
1475ev_check_start (EV_P_ struct ev_check *w)
1476{
1477 if (ev_is_active (w))
1478 return;
1479
1480 ev_start (EV_A_ (W)w, ++checkcnt);
1481 array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1482 checks [checkcnt - 1] = w;
1483}
1484
1485void
1486ev_check_stop (EV_P_ struct ev_check *w)
1487{
1488 ev_clear_pending (EV_A_ (W)w);
1489 if (!ev_is_active (w))
1490 return;
1491
1492 checks [((W)w)->active - 1] = checks [--checkcnt];
1493 ev_stop (EV_A_ (W)w);
1494}
1495
1496#ifndef SA_RESTART 2309#ifndef SA_RESTART
1497# define SA_RESTART 0 2310# define SA_RESTART 0
1498#endif 2311#endif
1499 2312
1500void 2313void noinline
1501ev_signal_start (EV_P_ struct ev_signal *w) 2314ev_signal_start (EV_P_ ev_signal *w)
1502{ 2315{
1503#if EV_MULTIPLICITY 2316#if EV_MULTIPLICITY
1504 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2317 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1505#endif 2318#endif
1506 if (ev_is_active (w)) 2319 if (expect_false (ev_is_active (w)))
1507 return; 2320 return;
1508 2321
1509 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2322 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1510 2323
2324 evpipe_init (EV_A);
2325
2326 EV_FREQUENT_CHECK;
2327
2328 {
2329#ifndef _WIN32
2330 sigset_t full, prev;
2331 sigfillset (&full);
2332 sigprocmask (SIG_SETMASK, &full, &prev);
2333#endif
2334
2335 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2336
2337#ifndef _WIN32
2338 sigprocmask (SIG_SETMASK, &prev, 0);
2339#endif
2340 }
2341
1511 ev_start (EV_A_ (W)w, 1); 2342 ev_start (EV_A_ (W)w, 1);
1512 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1513 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2343 wlist_add (&signals [w->signum - 1].head, (WL)w);
1514 2344
1515 if (!((WL)w)->next) 2345 if (!((WL)w)->next)
1516 { 2346 {
1517#if WIN32 2347#if _WIN32
1518 signal (w->signum, sighandler); 2348 signal (w->signum, ev_sighandler);
1519#else 2349#else
1520 struct sigaction sa; 2350 struct sigaction sa;
1521 sa.sa_handler = sighandler; 2351 sa.sa_handler = ev_sighandler;
1522 sigfillset (&sa.sa_mask); 2352 sigfillset (&sa.sa_mask);
1523 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2353 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1524 sigaction (w->signum, &sa, 0); 2354 sigaction (w->signum, &sa, 0);
1525#endif 2355#endif
1526 } 2356 }
1527}
1528 2357
1529void 2358 EV_FREQUENT_CHECK;
2359}
2360
2361void noinline
1530ev_signal_stop (EV_P_ struct ev_signal *w) 2362ev_signal_stop (EV_P_ ev_signal *w)
1531{ 2363{
1532 ev_clear_pending (EV_A_ (W)w); 2364 clear_pending (EV_A_ (W)w);
1533 if (!ev_is_active (w)) 2365 if (expect_false (!ev_is_active (w)))
1534 return; 2366 return;
1535 2367
2368 EV_FREQUENT_CHECK;
2369
1536 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2370 wlist_del (&signals [w->signum - 1].head, (WL)w);
1537 ev_stop (EV_A_ (W)w); 2371 ev_stop (EV_A_ (W)w);
1538 2372
1539 if (!signals [w->signum - 1].head) 2373 if (!signals [w->signum - 1].head)
1540 signal (w->signum, SIG_DFL); 2374 signal (w->signum, SIG_DFL);
1541}
1542 2375
2376 EV_FREQUENT_CHECK;
2377}
2378
1543void 2379void
1544ev_child_start (EV_P_ struct ev_child *w) 2380ev_child_start (EV_P_ ev_child *w)
1545{ 2381{
1546#if EV_MULTIPLICITY 2382#if EV_MULTIPLICITY
1547 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2383 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1548#endif 2384#endif
1549 if (ev_is_active (w)) 2385 if (expect_false (ev_is_active (w)))
1550 return; 2386 return;
1551 2387
2388 EV_FREQUENT_CHECK;
2389
1552 ev_start (EV_A_ (W)w, 1); 2390 ev_start (EV_A_ (W)w, 1);
1553 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2391 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1554}
1555 2392
2393 EV_FREQUENT_CHECK;
2394}
2395
1556void 2396void
1557ev_child_stop (EV_P_ struct ev_child *w) 2397ev_child_stop (EV_P_ ev_child *w)
1558{ 2398{
1559 ev_clear_pending (EV_A_ (W)w); 2399 clear_pending (EV_A_ (W)w);
1560 if (!ev_is_active (w)) 2400 if (expect_false (!ev_is_active (w)))
1561 return; 2401 return;
1562 2402
2403 EV_FREQUENT_CHECK;
2404
1563 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2405 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1564 ev_stop (EV_A_ (W)w); 2406 ev_stop (EV_A_ (W)w);
2407
2408 EV_FREQUENT_CHECK;
1565} 2409}
2410
2411#if EV_STAT_ENABLE
2412
2413# ifdef _WIN32
2414# undef lstat
2415# define lstat(a,b) _stati64 (a,b)
2416# endif
2417
2418#define DEF_STAT_INTERVAL 5.0074891
2419#define MIN_STAT_INTERVAL 0.1074891
2420
2421static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2422
2423#if EV_USE_INOTIFY
2424# define EV_INOTIFY_BUFSIZE 8192
2425
2426static void noinline
2427infy_add (EV_P_ ev_stat *w)
2428{
2429 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);
2430
2431 if (w->wd < 0)
2432 {
2433 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2434
2435 /* monitor some parent directory for speedup hints */
2436 /* note that exceeding the hardcoded limit is not a correctness issue, */
2437 /* but an efficiency issue only */
2438 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2439 {
2440 char path [4096];
2441 strcpy (path, w->path);
2442
2443 do
2444 {
2445 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2446 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2447
2448 char *pend = strrchr (path, '/');
2449
2450 if (!pend)
2451 break; /* whoops, no '/', complain to your admin */
2452
2453 *pend = 0;
2454 w->wd = inotify_add_watch (fs_fd, path, mask);
2455 }
2456 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2457 }
2458 }
2459 else
2460 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2461
2462 if (w->wd >= 0)
2463 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2464}
2465
2466static void noinline
2467infy_del (EV_P_ ev_stat *w)
2468{
2469 int slot;
2470 int wd = w->wd;
2471
2472 if (wd < 0)
2473 return;
2474
2475 w->wd = -2;
2476 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2477 wlist_del (&fs_hash [slot].head, (WL)w);
2478
2479 /* remove this watcher, if others are watching it, they will rearm */
2480 inotify_rm_watch (fs_fd, wd);
2481}
2482
2483static void noinline
2484infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2485{
2486 if (slot < 0)
2487 /* overflow, need to check for all hahs slots */
2488 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2489 infy_wd (EV_A_ slot, wd, ev);
2490 else
2491 {
2492 WL w_;
2493
2494 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2495 {
2496 ev_stat *w = (ev_stat *)w_;
2497 w_ = w_->next; /* lets us remove this watcher and all before it */
2498
2499 if (w->wd == wd || wd == -1)
2500 {
2501 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2502 {
2503 w->wd = -1;
2504 infy_add (EV_A_ w); /* re-add, no matter what */
2505 }
2506
2507 stat_timer_cb (EV_A_ &w->timer, 0);
2508 }
2509 }
2510 }
2511}
2512
2513static void
2514infy_cb (EV_P_ ev_io *w, int revents)
2515{
2516 char buf [EV_INOTIFY_BUFSIZE];
2517 struct inotify_event *ev = (struct inotify_event *)buf;
2518 int ofs;
2519 int len = read (fs_fd, buf, sizeof (buf));
2520
2521 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2522 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2523}
2524
2525void inline_size
2526infy_init (EV_P)
2527{
2528 if (fs_fd != -2)
2529 return;
2530
2531 fs_fd = inotify_init ();
2532
2533 if (fs_fd >= 0)
2534 {
2535 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2536 ev_set_priority (&fs_w, EV_MAXPRI);
2537 ev_io_start (EV_A_ &fs_w);
2538 }
2539}
2540
2541void inline_size
2542infy_fork (EV_P)
2543{
2544 int slot;
2545
2546 if (fs_fd < 0)
2547 return;
2548
2549 close (fs_fd);
2550 fs_fd = inotify_init ();
2551
2552 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2553 {
2554 WL w_ = fs_hash [slot].head;
2555 fs_hash [slot].head = 0;
2556
2557 while (w_)
2558 {
2559 ev_stat *w = (ev_stat *)w_;
2560 w_ = w_->next; /* lets us add this watcher */
2561
2562 w->wd = -1;
2563
2564 if (fs_fd >= 0)
2565 infy_add (EV_A_ w); /* re-add, no matter what */
2566 else
2567 ev_timer_start (EV_A_ &w->timer);
2568 }
2569
2570 }
2571}
2572
2573#endif
2574
2575#ifdef _WIN32
2576# define EV_LSTAT(p,b) _stati64 (p, b)
2577#else
2578# define EV_LSTAT(p,b) lstat (p, b)
2579#endif
2580
2581void
2582ev_stat_stat (EV_P_ ev_stat *w)
2583{
2584 if (lstat (w->path, &w->attr) < 0)
2585 w->attr.st_nlink = 0;
2586 else if (!w->attr.st_nlink)
2587 w->attr.st_nlink = 1;
2588}
2589
2590static void noinline
2591stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2592{
2593 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2594
2595 /* we copy this here each the time so that */
2596 /* prev has the old value when the callback gets invoked */
2597 w->prev = w->attr;
2598 ev_stat_stat (EV_A_ w);
2599
2600 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2601 if (
2602 w->prev.st_dev != w->attr.st_dev
2603 || w->prev.st_ino != w->attr.st_ino
2604 || w->prev.st_mode != w->attr.st_mode
2605 || w->prev.st_nlink != w->attr.st_nlink
2606 || w->prev.st_uid != w->attr.st_uid
2607 || w->prev.st_gid != w->attr.st_gid
2608 || w->prev.st_rdev != w->attr.st_rdev
2609 || w->prev.st_size != w->attr.st_size
2610 || w->prev.st_atime != w->attr.st_atime
2611 || w->prev.st_mtime != w->attr.st_mtime
2612 || w->prev.st_ctime != w->attr.st_ctime
2613 ) {
2614 #if EV_USE_INOTIFY
2615 infy_del (EV_A_ w);
2616 infy_add (EV_A_ w);
2617 ev_stat_stat (EV_A_ w); /* avoid race... */
2618 #endif
2619
2620 ev_feed_event (EV_A_ w, EV_STAT);
2621 }
2622}
2623
2624void
2625ev_stat_start (EV_P_ ev_stat *w)
2626{
2627 if (expect_false (ev_is_active (w)))
2628 return;
2629
2630 /* since we use memcmp, we need to clear any padding data etc. */
2631 memset (&w->prev, 0, sizeof (ev_statdata));
2632 memset (&w->attr, 0, sizeof (ev_statdata));
2633
2634 ev_stat_stat (EV_A_ w);
2635
2636 if (w->interval < MIN_STAT_INTERVAL)
2637 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2638
2639 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2640 ev_set_priority (&w->timer, ev_priority (w));
2641
2642#if EV_USE_INOTIFY
2643 infy_init (EV_A);
2644
2645 if (fs_fd >= 0)
2646 infy_add (EV_A_ w);
2647 else
2648#endif
2649 ev_timer_start (EV_A_ &w->timer);
2650
2651 ev_start (EV_A_ (W)w, 1);
2652
2653 EV_FREQUENT_CHECK;
2654}
2655
2656void
2657ev_stat_stop (EV_P_ ev_stat *w)
2658{
2659 clear_pending (EV_A_ (W)w);
2660 if (expect_false (!ev_is_active (w)))
2661 return;
2662
2663 EV_FREQUENT_CHECK;
2664
2665#if EV_USE_INOTIFY
2666 infy_del (EV_A_ w);
2667#endif
2668 ev_timer_stop (EV_A_ &w->timer);
2669
2670 ev_stop (EV_A_ (W)w);
2671
2672 EV_FREQUENT_CHECK;
2673}
2674#endif
2675
2676#if EV_IDLE_ENABLE
2677void
2678ev_idle_start (EV_P_ ev_idle *w)
2679{
2680 if (expect_false (ev_is_active (w)))
2681 return;
2682
2683 pri_adjust (EV_A_ (W)w);
2684
2685 EV_FREQUENT_CHECK;
2686
2687 {
2688 int active = ++idlecnt [ABSPRI (w)];
2689
2690 ++idleall;
2691 ev_start (EV_A_ (W)w, active);
2692
2693 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2694 idles [ABSPRI (w)][active - 1] = w;
2695 }
2696
2697 EV_FREQUENT_CHECK;
2698}
2699
2700void
2701ev_idle_stop (EV_P_ ev_idle *w)
2702{
2703 clear_pending (EV_A_ (W)w);
2704 if (expect_false (!ev_is_active (w)))
2705 return;
2706
2707 EV_FREQUENT_CHECK;
2708
2709 {
2710 int active = ev_active (w);
2711
2712 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2713 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2714
2715 ev_stop (EV_A_ (W)w);
2716 --idleall;
2717 }
2718
2719 EV_FREQUENT_CHECK;
2720}
2721#endif
2722
2723void
2724ev_prepare_start (EV_P_ ev_prepare *w)
2725{
2726 if (expect_false (ev_is_active (w)))
2727 return;
2728
2729 EV_FREQUENT_CHECK;
2730
2731 ev_start (EV_A_ (W)w, ++preparecnt);
2732 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2733 prepares [preparecnt - 1] = w;
2734
2735 EV_FREQUENT_CHECK;
2736}
2737
2738void
2739ev_prepare_stop (EV_P_ ev_prepare *w)
2740{
2741 clear_pending (EV_A_ (W)w);
2742 if (expect_false (!ev_is_active (w)))
2743 return;
2744
2745 EV_FREQUENT_CHECK;
2746
2747 {
2748 int active = ev_active (w);
2749
2750 prepares [active - 1] = prepares [--preparecnt];
2751 ev_active (prepares [active - 1]) = active;
2752 }
2753
2754 ev_stop (EV_A_ (W)w);
2755
2756 EV_FREQUENT_CHECK;
2757}
2758
2759void
2760ev_check_start (EV_P_ ev_check *w)
2761{
2762 if (expect_false (ev_is_active (w)))
2763 return;
2764
2765 EV_FREQUENT_CHECK;
2766
2767 ev_start (EV_A_ (W)w, ++checkcnt);
2768 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2769 checks [checkcnt - 1] = w;
2770
2771 EV_FREQUENT_CHECK;
2772}
2773
2774void
2775ev_check_stop (EV_P_ ev_check *w)
2776{
2777 clear_pending (EV_A_ (W)w);
2778 if (expect_false (!ev_is_active (w)))
2779 return;
2780
2781 EV_FREQUENT_CHECK;
2782
2783 {
2784 int active = ev_active (w);
2785
2786 checks [active - 1] = checks [--checkcnt];
2787 ev_active (checks [active - 1]) = active;
2788 }
2789
2790 ev_stop (EV_A_ (W)w);
2791
2792 EV_FREQUENT_CHECK;
2793}
2794
2795#if EV_EMBED_ENABLE
2796void noinline
2797ev_embed_sweep (EV_P_ ev_embed *w)
2798{
2799 ev_loop (w->other, EVLOOP_NONBLOCK);
2800}
2801
2802static void
2803embed_io_cb (EV_P_ ev_io *io, int revents)
2804{
2805 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2806
2807 if (ev_cb (w))
2808 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2809 else
2810 ev_loop (w->other, EVLOOP_NONBLOCK);
2811}
2812
2813static void
2814embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2815{
2816 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2817
2818 {
2819 struct ev_loop *loop = w->other;
2820
2821 while (fdchangecnt)
2822 {
2823 fd_reify (EV_A);
2824 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2825 }
2826 }
2827}
2828
2829#if 0
2830static void
2831embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2832{
2833 ev_idle_stop (EV_A_ idle);
2834}
2835#endif
2836
2837void
2838ev_embed_start (EV_P_ ev_embed *w)
2839{
2840 if (expect_false (ev_is_active (w)))
2841 return;
2842
2843 {
2844 struct ev_loop *loop = w->other;
2845 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2846 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2847 }
2848
2849 EV_FREQUENT_CHECK;
2850
2851 ev_set_priority (&w->io, ev_priority (w));
2852 ev_io_start (EV_A_ &w->io);
2853
2854 ev_prepare_init (&w->prepare, embed_prepare_cb);
2855 ev_set_priority (&w->prepare, EV_MINPRI);
2856 ev_prepare_start (EV_A_ &w->prepare);
2857
2858 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2859
2860 ev_start (EV_A_ (W)w, 1);
2861
2862 EV_FREQUENT_CHECK;
2863}
2864
2865void
2866ev_embed_stop (EV_P_ ev_embed *w)
2867{
2868 clear_pending (EV_A_ (W)w);
2869 if (expect_false (!ev_is_active (w)))
2870 return;
2871
2872 EV_FREQUENT_CHECK;
2873
2874 ev_io_stop (EV_A_ &w->io);
2875 ev_prepare_stop (EV_A_ &w->prepare);
2876
2877 ev_stop (EV_A_ (W)w);
2878
2879 EV_FREQUENT_CHECK;
2880}
2881#endif
2882
2883#if EV_FORK_ENABLE
2884void
2885ev_fork_start (EV_P_ ev_fork *w)
2886{
2887 if (expect_false (ev_is_active (w)))
2888 return;
2889
2890 EV_FREQUENT_CHECK;
2891
2892 ev_start (EV_A_ (W)w, ++forkcnt);
2893 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2894 forks [forkcnt - 1] = w;
2895
2896 EV_FREQUENT_CHECK;
2897}
2898
2899void
2900ev_fork_stop (EV_P_ ev_fork *w)
2901{
2902 clear_pending (EV_A_ (W)w);
2903 if (expect_false (!ev_is_active (w)))
2904 return;
2905
2906 EV_FREQUENT_CHECK;
2907
2908 {
2909 int active = ev_active (w);
2910
2911 forks [active - 1] = forks [--forkcnt];
2912 ev_active (forks [active - 1]) = active;
2913 }
2914
2915 ev_stop (EV_A_ (W)w);
2916
2917 EV_FREQUENT_CHECK;
2918}
2919#endif
2920
2921#if EV_ASYNC_ENABLE
2922void
2923ev_async_start (EV_P_ ev_async *w)
2924{
2925 if (expect_false (ev_is_active (w)))
2926 return;
2927
2928 evpipe_init (EV_A);
2929
2930 EV_FREQUENT_CHECK;
2931
2932 ev_start (EV_A_ (W)w, ++asynccnt);
2933 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2934 asyncs [asynccnt - 1] = w;
2935
2936 EV_FREQUENT_CHECK;
2937}
2938
2939void
2940ev_async_stop (EV_P_ ev_async *w)
2941{
2942 clear_pending (EV_A_ (W)w);
2943 if (expect_false (!ev_is_active (w)))
2944 return;
2945
2946 EV_FREQUENT_CHECK;
2947
2948 {
2949 int active = ev_active (w);
2950
2951 asyncs [active - 1] = asyncs [--asynccnt];
2952 ev_active (asyncs [active - 1]) = active;
2953 }
2954
2955 ev_stop (EV_A_ (W)w);
2956
2957 EV_FREQUENT_CHECK;
2958}
2959
2960void
2961ev_async_send (EV_P_ ev_async *w)
2962{
2963 w->sent = 1;
2964 evpipe_write (EV_A_ &gotasync);
2965}
2966#endif
1566 2967
1567/*****************************************************************************/ 2968/*****************************************************************************/
1568 2969
1569struct ev_once 2970struct ev_once
1570{ 2971{
1571 struct ev_io io; 2972 ev_io io;
1572 struct ev_timer to; 2973 ev_timer to;
1573 void (*cb)(int revents, void *arg); 2974 void (*cb)(int revents, void *arg);
1574 void *arg; 2975 void *arg;
1575}; 2976};
1576 2977
1577static void 2978static void
… …
1586 2987
1587 cb (revents, arg); 2988 cb (revents, arg);
1588} 2989}
1589 2990
1590static void 2991static void
1591once_cb_io (EV_P_ struct ev_io *w, int revents) 2992once_cb_io (EV_P_ ev_io *w, int revents)
1592{ 2993{
1593 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2994 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1594} 2995}
1595 2996
1596static void 2997static void
1597once_cb_to (EV_P_ struct ev_timer *w, int revents) 2998once_cb_to (EV_P_ ev_timer *w, int revents)
1598{ 2999{
1599 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3000 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1600} 3001}
1601 3002
1602void 3003void
1603ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3004ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1604{ 3005{
1605 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3006 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1606 3007
1607 if (!once) 3008 if (expect_false (!once))
3009 {
1608 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3010 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1609 else 3011 return;
1610 { 3012 }
3013
1611 once->cb = cb; 3014 once->cb = cb;
1612 once->arg = arg; 3015 once->arg = arg;
1613 3016
1614 ev_init (&once->io, once_cb_io); 3017 ev_init (&once->io, once_cb_io);
1615 if (fd >= 0) 3018 if (fd >= 0)
1616 { 3019 {
1617 ev_io_set (&once->io, fd, events); 3020 ev_io_set (&once->io, fd, events);
1618 ev_io_start (EV_A_ &once->io); 3021 ev_io_start (EV_A_ &once->io);
1619 } 3022 }
1620 3023
1621 ev_init (&once->to, once_cb_to); 3024 ev_init (&once->to, once_cb_to);
1622 if (timeout >= 0.) 3025 if (timeout >= 0.)
1623 { 3026 {
1624 ev_timer_set (&once->to, timeout, 0.); 3027 ev_timer_set (&once->to, timeout, 0.);
1625 ev_timer_start (EV_A_ &once->to); 3028 ev_timer_start (EV_A_ &once->to);
1626 }
1627 } 3029 }
1628} 3030}
3031
3032#if EV_MULTIPLICITY
3033 #include "ev_wrap.h"
3034#endif
1629 3035
1630#ifdef __cplusplus 3036#ifdef __cplusplus
1631} 3037}
1632#endif 3038#endif
1633 3039

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