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Comparing libev/ev.c (file contents):
Revision 1.99 by root, Sun Nov 11 02:26:47 2007 UTC vs.
Revision 1.268 by root, Mon Oct 27 13:39:18 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/utsname.h>
292# include <sys/inotify.h>
293/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
294# ifndef IN_DONT_FOLLOW
295# undef EV_USE_INOTIFY
296# define EV_USE_INOTIFY 0
297# endif
298#endif
299
300#if EV_SELECT_IS_WINSOCKET
301# include <winsock.h>
302#endif
303
304#if EV_USE_EVENTFD
305/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
306# include <stdint.h>
307# ifdef __cplusplus
308extern "C" {
309# endif
310int eventfd (unsigned int initval, int flags);
311# ifdef __cplusplus
312}
313# endif
314#endif
315
316/**/
317
318#if EV_VERIFY >= 3
319# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
320#else
321# define EV_FREQUENT_CHECK do { } while (0)
322#endif
323
324/*
325 * This is used to avoid floating point rounding problems.
326 * It is added to ev_rt_now when scheduling periodics
327 * to ensure progress, time-wise, even when rounding
328 * errors are against us.
329 * This value is good at least till the year 4000.
330 * Better solutions welcome.
331 */
332#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
333
334#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
335#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
336/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
337
146#if __GNUC__ >= 3 338#if __GNUC__ >= 4
147# define expect(expr,value) __builtin_expect ((expr),(value)) 339# define expect(expr,value) __builtin_expect ((expr),(value))
148# define inline inline 340# define noinline __attribute__ ((noinline))
149#else 341#else
150# define expect(expr,value) (expr) 342# define expect(expr,value) (expr)
151# define inline static 343# define noinline
344# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
345# define inline
346# endif
152#endif 347#endif
153 348
154#define expect_false(expr) expect ((expr) != 0, 0) 349#define expect_false(expr) expect ((expr) != 0, 0)
155#define expect_true(expr) expect ((expr) != 0, 1) 350#define expect_true(expr) expect ((expr) != 0, 1)
351#define inline_size static inline
352
353#if EV_MINIMAL
354# define inline_speed static noinline
355#else
356# define inline_speed static inline
357#endif
156 358
157#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 359#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
158#define ABSPRI(w) ((w)->priority - EV_MINPRI) 360#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
159 361
362#define EMPTY /* required for microsofts broken pseudo-c compiler */
363#define EMPTY2(a,b) /* used to suppress some warnings */
364
160typedef struct ev_watcher *W; 365typedef ev_watcher *W;
161typedef struct ev_watcher_list *WL; 366typedef ev_watcher_list *WL;
162typedef struct ev_watcher_time *WT; 367typedef ev_watcher_time *WT;
163 368
369#define ev_active(w) ((W)(w))->active
370#define ev_at(w) ((WT)(w))->at
371
372#if EV_USE_MONOTONIC
373/* sig_atomic_t is used to avoid per-thread variables or locking but still */
374/* giving it a reasonably high chance of working on typical architetcures */
164static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 375static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
376#endif
165 377
166#ifdef WIN32 378#ifdef _WIN32
167# include "ev_win32.c" 379# include "ev_win32.c"
168#endif 380#endif
169 381
170/*****************************************************************************/ 382/*****************************************************************************/
171 383
172static void (*syserr_cb)(const char *msg); 384static void (*syserr_cb)(const char *msg);
173 385
386void
174void ev_set_syserr_cb (void (*cb)(const char *msg)) 387ev_set_syserr_cb (void (*cb)(const char *msg))
175{ 388{
176 syserr_cb = cb; 389 syserr_cb = cb;
177} 390}
178 391
179static void 392static void noinline
180syserr (const char *msg) 393syserr (const char *msg)
181{ 394{
182 if (!msg) 395 if (!msg)
183 msg = "(libev) system error"; 396 msg = "(libev) system error";
184 397
… …
189 perror (msg); 402 perror (msg);
190 abort (); 403 abort ();
191 } 404 }
192} 405}
193 406
407static void *
408ev_realloc_emul (void *ptr, long size)
409{
410 /* some systems, notably openbsd and darwin, fail to properly
411 * implement realloc (x, 0) (as required by both ansi c-98 and
412 * the single unix specification, so work around them here.
413 */
414
415 if (size)
416 return realloc (ptr, size);
417
418 free (ptr);
419 return 0;
420}
421
194static void *(*alloc)(void *ptr, long size); 422static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
195 423
424void
196void ev_set_allocator (void *(*cb)(void *ptr, long size)) 425ev_set_allocator (void *(*cb)(void *ptr, long size))
197{ 426{
198 alloc = cb; 427 alloc = cb;
199} 428}
200 429
201static void * 430inline_speed void *
202ev_realloc (void *ptr, long size) 431ev_realloc (void *ptr, long size)
203{ 432{
204 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 433 ptr = alloc (ptr, size);
205 434
206 if (!ptr && size) 435 if (!ptr && size)
207 { 436 {
208 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 437 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
209 abort (); 438 abort ();
… …
220typedef struct 449typedef struct
221{ 450{
222 WL head; 451 WL head;
223 unsigned char events; 452 unsigned char events;
224 unsigned char reify; 453 unsigned char reify;
454 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
455 unsigned char egen; /* generation counter to counter epoll bugs */
456#if EV_SELECT_IS_WINSOCKET
457 SOCKET handle;
458#endif
225} ANFD; 459} ANFD;
226 460
227typedef struct 461typedef struct
228{ 462{
229 W w; 463 W w;
230 int events; 464 int events;
231} ANPENDING; 465} ANPENDING;
466
467#if EV_USE_INOTIFY
468/* hash table entry per inotify-id */
469typedef struct
470{
471 WL head;
472} ANFS;
473#endif
474
475/* Heap Entry */
476#if EV_HEAP_CACHE_AT
477 typedef struct {
478 ev_tstamp at;
479 WT w;
480 } ANHE;
481
482 #define ANHE_w(he) (he).w /* access watcher, read-write */
483 #define ANHE_at(he) (he).at /* access cached at, read-only */
484 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
485#else
486 typedef WT ANHE;
487
488 #define ANHE_w(he) (he)
489 #define ANHE_at(he) (he)->at
490 #define ANHE_at_cache(he)
491#endif
232 492
233#if EV_MULTIPLICITY 493#if EV_MULTIPLICITY
234 494
235 struct ev_loop 495 struct ev_loop
236 { 496 {
… …
240 #include "ev_vars.h" 500 #include "ev_vars.h"
241 #undef VAR 501 #undef VAR
242 }; 502 };
243 #include "ev_wrap.h" 503 #include "ev_wrap.h"
244 504
245 struct ev_loop default_loop_struct; 505 static struct ev_loop default_loop_struct;
246 static struct ev_loop *default_loop; 506 struct ev_loop *ev_default_loop_ptr;
247 507
248#else 508#else
249 509
250 ev_tstamp ev_rt_now; 510 ev_tstamp ev_rt_now;
251 #define VAR(name,decl) static decl; 511 #define VAR(name,decl) static decl;
252 #include "ev_vars.h" 512 #include "ev_vars.h"
253 #undef VAR 513 #undef VAR
254 514
255 static int default_loop; 515 static int ev_default_loop_ptr;
256 516
257#endif 517#endif
258 518
259/*****************************************************************************/ 519/*****************************************************************************/
260 520
… …
270 gettimeofday (&tv, 0); 530 gettimeofday (&tv, 0);
271 return tv.tv_sec + tv.tv_usec * 1e-6; 531 return tv.tv_sec + tv.tv_usec * 1e-6;
272#endif 532#endif
273} 533}
274 534
275inline ev_tstamp 535ev_tstamp inline_size
276get_clock (void) 536get_clock (void)
277{ 537{
278#if EV_USE_MONOTONIC 538#if EV_USE_MONOTONIC
279 if (expect_true (have_monotonic)) 539 if (expect_true (have_monotonic))
280 { 540 {
… …
293{ 553{
294 return ev_rt_now; 554 return ev_rt_now;
295} 555}
296#endif 556#endif
297 557
298#define array_roundsize(type,n) ((n) | 4 & ~3) 558void
559ev_sleep (ev_tstamp delay)
560{
561 if (delay > 0.)
562 {
563#if EV_USE_NANOSLEEP
564 struct timespec ts;
565
566 ts.tv_sec = (time_t)delay;
567 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
568
569 nanosleep (&ts, 0);
570#elif defined(_WIN32)
571 Sleep ((unsigned long)(delay * 1e3));
572#else
573 struct timeval tv;
574
575 tv.tv_sec = (time_t)delay;
576 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
577
578 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
579 /* somehting nto guaranteed by newer posix versions, but guaranteed */
580 /* by older ones */
581 select (0, 0, 0, 0, &tv);
582#endif
583 }
584}
585
586/*****************************************************************************/
587
588#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
589
590int inline_size
591array_nextsize (int elem, int cur, int cnt)
592{
593 int ncur = cur + 1;
594
595 do
596 ncur <<= 1;
597 while (cnt > ncur);
598
599 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
600 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
601 {
602 ncur *= elem;
603 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
604 ncur = ncur - sizeof (void *) * 4;
605 ncur /= elem;
606 }
607
608 return ncur;
609}
610
611static noinline void *
612array_realloc (int elem, void *base, int *cur, int cnt)
613{
614 *cur = array_nextsize (elem, *cur, cnt);
615 return ev_realloc (base, elem * *cur);
616}
617
618#define array_init_zero(base,count) \
619 memset ((void *)(base), 0, sizeof (*(base)) * (count))
299 620
300#define array_needsize(type,base,cur,cnt,init) \ 621#define array_needsize(type,base,cur,cnt,init) \
301 if (expect_false ((cnt) > cur)) \ 622 if (expect_false ((cnt) > (cur))) \
302 { \ 623 { \
303 int newcnt = cur; \ 624 int ocur_ = (cur); \
304 do \ 625 (base) = (type *)array_realloc \
305 { \ 626 (sizeof (type), (base), &(cur), (cnt)); \
306 newcnt = array_roundsize (type, newcnt << 1); \ 627 init ((base) + (ocur_), (cur) - ocur_); \
307 } \
308 while ((cnt) > newcnt); \
309 \
310 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
311 init (base + cur, newcnt - cur); \
312 cur = newcnt; \
313 } 628 }
314 629
630#if 0
315#define array_slim(type,stem) \ 631#define array_slim(type,stem) \
316 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 632 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
317 { \ 633 { \
318 stem ## max = array_roundsize (stem ## cnt >> 1); \ 634 stem ## max = array_roundsize (stem ## cnt >> 1); \
319 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 635 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
320 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 636 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
321 } 637 }
322 638#endif
323/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
324/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
325#define array_free_microshit(stem) \
326 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
327 639
328#define array_free(stem, idx) \ 640#define array_free(stem, idx) \
329 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 641 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
330 642
331/*****************************************************************************/ 643/*****************************************************************************/
332 644
333static void 645void noinline
334anfds_init (ANFD *base, int count)
335{
336 while (count--)
337 {
338 base->head = 0;
339 base->events = EV_NONE;
340 base->reify = 0;
341
342 ++base;
343 }
344}
345
346void
347ev_feed_event (EV_P_ void *w, int revents) 646ev_feed_event (EV_P_ void *w, int revents)
348{ 647{
349 W w_ = (W)w; 648 W w_ = (W)w;
649 int pri = ABSPRI (w_);
350 650
351 if (w_->pending) 651 if (expect_false (w_->pending))
652 pendings [pri][w_->pending - 1].events |= revents;
653 else
352 { 654 {
655 w_->pending = ++pendingcnt [pri];
656 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
657 pendings [pri][w_->pending - 1].w = w_;
353 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 658 pendings [pri][w_->pending - 1].events = revents;
354 return;
355 } 659 }
356
357 w_->pending = ++pendingcnt [ABSPRI (w_)];
358 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
359 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
360 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
361} 660}
362 661
363static void 662void inline_speed
364queue_events (EV_P_ W *events, int eventcnt, int type) 663queue_events (EV_P_ W *events, int eventcnt, int type)
365{ 664{
366 int i; 665 int i;
367 666
368 for (i = 0; i < eventcnt; ++i) 667 for (i = 0; i < eventcnt; ++i)
369 ev_feed_event (EV_A_ events [i], type); 668 ev_feed_event (EV_A_ events [i], type);
370} 669}
371 670
372inline void 671/*****************************************************************************/
672
673void inline_speed
373fd_event (EV_P_ int fd, int revents) 674fd_event (EV_P_ int fd, int revents)
374{ 675{
375 ANFD *anfd = anfds + fd; 676 ANFD *anfd = anfds + fd;
376 struct ev_io *w; 677 ev_io *w;
377 678
378 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 679 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
379 { 680 {
380 int ev = w->events & revents; 681 int ev = w->events & revents;
381 682
382 if (ev) 683 if (ev)
383 ev_feed_event (EV_A_ (W)w, ev); 684 ev_feed_event (EV_A_ (W)w, ev);
… …
385} 686}
386 687
387void 688void
388ev_feed_fd_event (EV_P_ int fd, int revents) 689ev_feed_fd_event (EV_P_ int fd, int revents)
389{ 690{
691 if (fd >= 0 && fd < anfdmax)
390 fd_event (EV_A_ fd, revents); 692 fd_event (EV_A_ fd, revents);
391} 693}
392 694
393/*****************************************************************************/ 695void inline_size
394
395static void
396fd_reify (EV_P) 696fd_reify (EV_P)
397{ 697{
398 int i; 698 int i;
399 699
400 for (i = 0; i < fdchangecnt; ++i) 700 for (i = 0; i < fdchangecnt; ++i)
401 { 701 {
402 int fd = fdchanges [i]; 702 int fd = fdchanges [i];
403 ANFD *anfd = anfds + fd; 703 ANFD *anfd = anfds + fd;
404 struct ev_io *w; 704 ev_io *w;
405 705
406 int events = 0; 706 unsigned char events = 0;
407 707
408 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 708 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
409 events |= w->events; 709 events |= (unsigned char)w->events;
410 710
711#if EV_SELECT_IS_WINSOCKET
712 if (events)
713 {
714 unsigned long arg;
715 #ifdef EV_FD_TO_WIN32_HANDLE
716 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
717 #else
718 anfd->handle = _get_osfhandle (fd);
719 #endif
720 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
721 }
722#endif
723
724 {
725 unsigned char o_events = anfd->events;
726 unsigned char o_reify = anfd->reify;
727
411 anfd->reify = 0; 728 anfd->reify = 0;
412
413 method_modify (EV_A_ fd, anfd->events, events);
414 anfd->events = events; 729 anfd->events = events;
730
731 if (o_events != events || o_reify & EV_IOFDSET)
732 backend_modify (EV_A_ fd, o_events, events);
733 }
415 } 734 }
416 735
417 fdchangecnt = 0; 736 fdchangecnt = 0;
418} 737}
419 738
420static void 739void inline_size
421fd_change (EV_P_ int fd) 740fd_change (EV_P_ int fd, int flags)
422{ 741{
423 if (anfds [fd].reify) 742 unsigned char reify = anfds [fd].reify;
424 return;
425
426 anfds [fd].reify = 1; 743 anfds [fd].reify |= flags;
427 744
745 if (expect_true (!reify))
746 {
428 ++fdchangecnt; 747 ++fdchangecnt;
429 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); 748 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
430 fdchanges [fdchangecnt - 1] = fd; 749 fdchanges [fdchangecnt - 1] = fd;
750 }
431} 751}
432 752
433static void 753void inline_speed
434fd_kill (EV_P_ int fd) 754fd_kill (EV_P_ int fd)
435{ 755{
436 struct ev_io *w; 756 ev_io *w;
437 757
438 while ((w = (struct ev_io *)anfds [fd].head)) 758 while ((w = (ev_io *)anfds [fd].head))
439 { 759 {
440 ev_io_stop (EV_A_ w); 760 ev_io_stop (EV_A_ w);
441 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 761 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
442 } 762 }
443} 763}
444 764
445static int 765int inline_size
446fd_valid (int fd) 766fd_valid (int fd)
447{ 767{
448#ifdef WIN32 768#ifdef _WIN32
449 return !!win32_get_osfhandle (fd); 769 return _get_osfhandle (fd) != -1;
450#else 770#else
451 return fcntl (fd, F_GETFD) != -1; 771 return fcntl (fd, F_GETFD) != -1;
452#endif 772#endif
453} 773}
454 774
455/* called on EBADF to verify fds */ 775/* called on EBADF to verify fds */
456static void 776static void noinline
457fd_ebadf (EV_P) 777fd_ebadf (EV_P)
458{ 778{
459 int fd; 779 int fd;
460 780
461 for (fd = 0; fd < anfdmax; ++fd) 781 for (fd = 0; fd < anfdmax; ++fd)
462 if (anfds [fd].events) 782 if (anfds [fd].events)
463 if (!fd_valid (fd) == -1 && errno == EBADF) 783 if (!fd_valid (fd) && errno == EBADF)
464 fd_kill (EV_A_ fd); 784 fd_kill (EV_A_ fd);
465} 785}
466 786
467/* called on ENOMEM in select/poll to kill some fds and retry */ 787/* called on ENOMEM in select/poll to kill some fds and retry */
468static void 788static void noinline
469fd_enomem (EV_P) 789fd_enomem (EV_P)
470{ 790{
471 int fd; 791 int fd;
472 792
473 for (fd = anfdmax; fd--; ) 793 for (fd = anfdmax; fd--; )
… …
476 fd_kill (EV_A_ fd); 796 fd_kill (EV_A_ fd);
477 return; 797 return;
478 } 798 }
479} 799}
480 800
481/* usually called after fork if method needs to re-arm all fds from scratch */ 801/* usually called after fork if backend needs to re-arm all fds from scratch */
482static void 802static void noinline
483fd_rearm_all (EV_P) 803fd_rearm_all (EV_P)
484{ 804{
485 int fd; 805 int fd;
486 806
487 /* this should be highly optimised to not do anything but set a flag */
488 for (fd = 0; fd < anfdmax; ++fd) 807 for (fd = 0; fd < anfdmax; ++fd)
489 if (anfds [fd].events) 808 if (anfds [fd].events)
490 { 809 {
491 anfds [fd].events = 0; 810 anfds [fd].events = 0;
811 anfds [fd].emask = 0;
492 fd_change (EV_A_ fd); 812 fd_change (EV_A_ fd, EV_IOFDSET | 1);
493 } 813 }
494} 814}
495 815
496/*****************************************************************************/ 816/*****************************************************************************/
497 817
498static void 818/*
499upheap (WT *heap, int k) 819 * the heap functions want a real array index. array index 0 uis guaranteed to not
500{ 820 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
501 WT w = heap [k]; 821 * the branching factor of the d-tree.
822 */
502 823
503 while (k && heap [k >> 1]->at > w->at) 824/*
504 { 825 * at the moment we allow libev the luxury of two heaps,
505 heap [k] = heap [k >> 1]; 826 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
506 ((W)heap [k])->active = k + 1; 827 * which is more cache-efficient.
507 k >>= 1; 828 * the difference is about 5% with 50000+ watchers.
508 } 829 */
830#if EV_USE_4HEAP
509 831
510 heap [k] = w; 832#define DHEAP 4
511 ((W)heap [k])->active = k + 1; 833#define HEAP0 (DHEAP - 1) /* index of first element in heap */
834#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
835#define UPHEAP_DONE(p,k) ((p) == (k))
512 836
513} 837/* away from the root */
514 838void inline_speed
515static void
516downheap (WT *heap, int N, int k) 839downheap (ANHE *heap, int N, int k)
517{ 840{
518 WT w = heap [k]; 841 ANHE he = heap [k];
842 ANHE *E = heap + N + HEAP0;
519 843
520 while (k < (N >> 1)) 844 for (;;)
521 { 845 {
522 int j = k << 1; 846 ev_tstamp minat;
847 ANHE *minpos;
848 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
523 849
524 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 850 /* find minimum child */
851 if (expect_true (pos + DHEAP - 1 < E))
525 ++j; 852 {
526 853 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
527 if (w->at <= heap [j]->at) 854 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
855 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
856 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
857 }
858 else if (pos < E)
859 {
860 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
861 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
862 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
863 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
864 }
865 else
528 break; 866 break;
529 867
868 if (ANHE_at (he) <= minat)
869 break;
870
871 heap [k] = *minpos;
872 ev_active (ANHE_w (*minpos)) = k;
873
874 k = minpos - heap;
875 }
876
877 heap [k] = he;
878 ev_active (ANHE_w (he)) = k;
879}
880
881#else /* 4HEAP */
882
883#define HEAP0 1
884#define HPARENT(k) ((k) >> 1)
885#define UPHEAP_DONE(p,k) (!(p))
886
887/* away from the root */
888void inline_speed
889downheap (ANHE *heap, int N, int k)
890{
891 ANHE he = heap [k];
892
893 for (;;)
894 {
895 int c = k << 1;
896
897 if (c > N + HEAP0 - 1)
898 break;
899
900 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
901 ? 1 : 0;
902
903 if (ANHE_at (he) <= ANHE_at (heap [c]))
904 break;
905
530 heap [k] = heap [j]; 906 heap [k] = heap [c];
531 ((W)heap [k])->active = k + 1; 907 ev_active (ANHE_w (heap [k])) = k;
908
532 k = j; 909 k = c;
533 } 910 }
534 911
535 heap [k] = w; 912 heap [k] = he;
536 ((W)heap [k])->active = k + 1; 913 ev_active (ANHE_w (he)) = k;
537} 914}
915#endif
538 916
539inline void 917/* towards the root */
918void inline_speed
919upheap (ANHE *heap, int k)
920{
921 ANHE he = heap [k];
922
923 for (;;)
924 {
925 int p = HPARENT (k);
926
927 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
928 break;
929
930 heap [k] = heap [p];
931 ev_active (ANHE_w (heap [k])) = k;
932 k = p;
933 }
934
935 heap [k] = he;
936 ev_active (ANHE_w (he)) = k;
937}
938
939void inline_size
540adjustheap (WT *heap, int N, int k) 940adjustheap (ANHE *heap, int N, int k)
541{ 941{
942 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
542 upheap (heap, k); 943 upheap (heap, k);
944 else
543 downheap (heap, N, k); 945 downheap (heap, N, k);
946}
947
948/* rebuild the heap: this function is used only once and executed rarely */
949void inline_size
950reheap (ANHE *heap, int N)
951{
952 int i;
953
954 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
955 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
956 for (i = 0; i < N; ++i)
957 upheap (heap, i + HEAP0);
544} 958}
545 959
546/*****************************************************************************/ 960/*****************************************************************************/
547 961
548typedef struct 962typedef struct
549{ 963{
550 WL head; 964 WL head;
551 sig_atomic_t volatile gotsig; 965 EV_ATOMIC_T gotsig;
552} ANSIG; 966} ANSIG;
553 967
554static ANSIG *signals; 968static ANSIG *signals;
555static int signalmax; 969static int signalmax;
556 970
557static int sigpipe [2]; 971static EV_ATOMIC_T gotsig;
558static sig_atomic_t volatile gotsig; 972
559static struct ev_io sigev; 973/*****************************************************************************/
974
975void inline_speed
976fd_intern (int fd)
977{
978#ifdef _WIN32
979 unsigned long arg = 1;
980 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
981#else
982 fcntl (fd, F_SETFD, FD_CLOEXEC);
983 fcntl (fd, F_SETFL, O_NONBLOCK);
984#endif
985}
986
987static void noinline
988evpipe_init (EV_P)
989{
990 if (!ev_is_active (&pipeev))
991 {
992#if EV_USE_EVENTFD
993 if ((evfd = eventfd (0, 0)) >= 0)
994 {
995 evpipe [0] = -1;
996 fd_intern (evfd);
997 ev_io_set (&pipeev, evfd, EV_READ);
998 }
999 else
1000#endif
1001 {
1002 while (pipe (evpipe))
1003 syserr ("(libev) error creating signal/async pipe");
1004
1005 fd_intern (evpipe [0]);
1006 fd_intern (evpipe [1]);
1007 ev_io_set (&pipeev, evpipe [0], EV_READ);
1008 }
1009
1010 ev_io_start (EV_A_ &pipeev);
1011 ev_unref (EV_A); /* watcher should not keep loop alive */
1012 }
1013}
1014
1015void inline_size
1016evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1017{
1018 if (!*flag)
1019 {
1020 int old_errno = errno; /* save errno because write might clobber it */
1021
1022 *flag = 1;
1023
1024#if EV_USE_EVENTFD
1025 if (evfd >= 0)
1026 {
1027 uint64_t counter = 1;
1028 write (evfd, &counter, sizeof (uint64_t));
1029 }
1030 else
1031#endif
1032 write (evpipe [1], &old_errno, 1);
1033
1034 errno = old_errno;
1035 }
1036}
560 1037
561static void 1038static void
562signals_init (ANSIG *base, int count) 1039pipecb (EV_P_ ev_io *iow, int revents)
563{ 1040{
564 while (count--) 1041#if EV_USE_EVENTFD
1042 if (evfd >= 0)
1043 {
1044 uint64_t counter;
1045 read (evfd, &counter, sizeof (uint64_t));
565 { 1046 }
566 base->head = 0; 1047 else
1048#endif
1049 {
1050 char dummy;
1051 read (evpipe [0], &dummy, 1);
1052 }
1053
1054 if (gotsig && ev_is_default_loop (EV_A))
1055 {
1056 int signum;
567 base->gotsig = 0; 1057 gotsig = 0;
568 1058
569 ++base; 1059 for (signum = signalmax; signum--; )
1060 if (signals [signum].gotsig)
1061 ev_feed_signal_event (EV_A_ signum + 1);
1062 }
1063
1064#if EV_ASYNC_ENABLE
1065 if (gotasync)
570 } 1066 {
1067 int i;
1068 gotasync = 0;
1069
1070 for (i = asynccnt; i--; )
1071 if (asyncs [i]->sent)
1072 {
1073 asyncs [i]->sent = 0;
1074 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1075 }
1076 }
1077#endif
571} 1078}
1079
1080/*****************************************************************************/
572 1081
573static void 1082static void
574sighandler (int signum) 1083ev_sighandler (int signum)
575{ 1084{
1085#if EV_MULTIPLICITY
1086 struct ev_loop *loop = &default_loop_struct;
1087#endif
1088
576#if WIN32 1089#if _WIN32
577 signal (signum, sighandler); 1090 signal (signum, ev_sighandler);
578#endif 1091#endif
579 1092
580 signals [signum - 1].gotsig = 1; 1093 signals [signum - 1].gotsig = 1;
581 1094 evpipe_write (EV_A_ &gotsig);
582 if (!gotsig)
583 {
584 int old_errno = errno;
585 gotsig = 1;
586#ifdef WIN32
587 send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
588#else
589 write (sigpipe [1], &signum, 1);
590#endif
591 errno = old_errno;
592 }
593} 1095}
594 1096
595void 1097void noinline
596ev_feed_signal_event (EV_P_ int signum) 1098ev_feed_signal_event (EV_P_ int signum)
597{ 1099{
598 WL w; 1100 WL w;
599 1101
600#if EV_MULTIPLICITY 1102#if EV_MULTIPLICITY
601 assert (("feeding signal events is only supported in the default loop", loop == default_loop)); 1103 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
602#endif 1104#endif
603 1105
604 --signum; 1106 --signum;
605 1107
606 if (signum < 0 || signum >= signalmax) 1108 if (signum < 0 || signum >= signalmax)
… …
610 1112
611 for (w = signals [signum].head; w; w = w->next) 1113 for (w = signals [signum].head; w; w = w->next)
612 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1114 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
613} 1115}
614 1116
615static void
616sigcb (EV_P_ struct ev_io *iow, int revents)
617{
618 int signum;
619
620#ifdef WIN32
621 recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
622#else
623 read (sigpipe [0], &revents, 1);
624#endif
625 gotsig = 0;
626
627 for (signum = signalmax; signum--; )
628 if (signals [signum].gotsig)
629 ev_feed_signal_event (EV_A_ signum + 1);
630}
631
632static void
633siginit (EV_P)
634{
635#ifndef WIN32
636 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
637 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
638
639 /* rather than sort out wether we really need nb, set it */
640 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
641 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
642#endif
643
644 ev_io_set (&sigev, sigpipe [0], EV_READ);
645 ev_io_start (EV_A_ &sigev);
646 ev_unref (EV_A); /* child watcher should not keep loop alive */
647}
648
649/*****************************************************************************/ 1117/*****************************************************************************/
650 1118
651static struct ev_child *childs [PID_HASHSIZE]; 1119static WL childs [EV_PID_HASHSIZE];
652 1120
653#ifndef WIN32 1121#ifndef _WIN32
654 1122
655static struct ev_signal childev; 1123static ev_signal childev;
1124
1125#ifndef WIFCONTINUED
1126# define WIFCONTINUED(status) 0
1127#endif
1128
1129void inline_speed
1130child_reap (EV_P_ int chain, int pid, int status)
1131{
1132 ev_child *w;
1133 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1134
1135 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1136 {
1137 if ((w->pid == pid || !w->pid)
1138 && (!traced || (w->flags & 1)))
1139 {
1140 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1141 w->rpid = pid;
1142 w->rstatus = status;
1143 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1144 }
1145 }
1146}
656 1147
657#ifndef WCONTINUED 1148#ifndef WCONTINUED
658# define WCONTINUED 0 1149# define WCONTINUED 0
659#endif 1150#endif
660 1151
661static void 1152static void
662child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
663{
664 struct ev_child *w;
665
666 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
667 if (w->pid == pid || !w->pid)
668 {
669 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
670 w->rpid = pid;
671 w->rstatus = status;
672 ev_feed_event (EV_A_ (W)w, EV_CHILD);
673 }
674}
675
676static void
677childcb (EV_P_ struct ev_signal *sw, int revents) 1153childcb (EV_P_ ev_signal *sw, int revents)
678{ 1154{
679 int pid, status; 1155 int pid, status;
680 1156
1157 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
681 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1158 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
682 { 1159 if (!WCONTINUED
1160 || errno != EINVAL
1161 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1162 return;
1163
683 /* make sure we are called again until all childs have been reaped */ 1164 /* make sure we are called again until all children have been reaped */
1165 /* we need to do it this way so that the callback gets called before we continue */
684 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1166 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
685 1167
686 child_reap (EV_A_ sw, pid, pid, status); 1168 child_reap (EV_A_ pid, pid, status);
1169 if (EV_PID_HASHSIZE > 1)
687 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1170 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
688 }
689} 1171}
690 1172
691#endif 1173#endif
692 1174
693/*****************************************************************************/ 1175/*****************************************************************************/
694 1176
1177#if EV_USE_PORT
1178# include "ev_port.c"
1179#endif
695#if EV_USE_KQUEUE 1180#if EV_USE_KQUEUE
696# include "ev_kqueue.c" 1181# include "ev_kqueue.c"
697#endif 1182#endif
698#if EV_USE_EPOLL 1183#if EV_USE_EPOLL
699# include "ev_epoll.c" 1184# include "ev_epoll.c"
… …
716{ 1201{
717 return EV_VERSION_MINOR; 1202 return EV_VERSION_MINOR;
718} 1203}
719 1204
720/* return true if we are running with elevated privileges and should ignore env variables */ 1205/* return true if we are running with elevated privileges and should ignore env variables */
721static int 1206int inline_size
722enable_secure (void) 1207enable_secure (void)
723{ 1208{
724#ifdef WIN32 1209#ifdef _WIN32
725 return 0; 1210 return 0;
726#else 1211#else
727 return getuid () != geteuid () 1212 return getuid () != geteuid ()
728 || getgid () != getegid (); 1213 || getgid () != getegid ();
729#endif 1214#endif
730} 1215}
731 1216
732int 1217unsigned int
733ev_method (EV_P) 1218ev_supported_backends (void)
734{ 1219{
735 return method; 1220 unsigned int flags = 0;
736}
737 1221
738static void 1222 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
739loop_init (EV_P_ int methods) 1223 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1224 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1225 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1226 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1227
1228 return flags;
1229}
1230
1231unsigned int
1232ev_recommended_backends (void)
740{ 1233{
741 if (!method) 1234 unsigned int flags = ev_supported_backends ();
1235
1236#ifndef __NetBSD__
1237 /* kqueue is borked on everything but netbsd apparently */
1238 /* it usually doesn't work correctly on anything but sockets and pipes */
1239 flags &= ~EVBACKEND_KQUEUE;
1240#endif
1241#ifdef __APPLE__
1242 // flags &= ~EVBACKEND_KQUEUE; for documentation
1243 flags &= ~EVBACKEND_POLL;
1244#endif
1245
1246 return flags;
1247}
1248
1249unsigned int
1250ev_embeddable_backends (void)
1251{
1252 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1253
1254 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1255 /* please fix it and tell me how to detect the fix */
1256 flags &= ~EVBACKEND_EPOLL;
1257
1258 return flags;
1259}
1260
1261unsigned int
1262ev_backend (EV_P)
1263{
1264 return backend;
1265}
1266
1267unsigned int
1268ev_loop_count (EV_P)
1269{
1270 return loop_count;
1271}
1272
1273void
1274ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1275{
1276 io_blocktime = interval;
1277}
1278
1279void
1280ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1281{
1282 timeout_blocktime = interval;
1283}
1284
1285static void noinline
1286loop_init (EV_P_ unsigned int flags)
1287{
1288 if (!backend)
742 { 1289 {
743#if EV_USE_MONOTONIC 1290#if EV_USE_MONOTONIC
744 { 1291 {
745 struct timespec ts; 1292 struct timespec ts;
746 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1293 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
747 have_monotonic = 1; 1294 have_monotonic = 1;
748 } 1295 }
749#endif 1296#endif
750 1297
751 ev_rt_now = ev_time (); 1298 ev_rt_now = ev_time ();
752 mn_now = get_clock (); 1299 mn_now = get_clock ();
753 now_floor = mn_now; 1300 now_floor = mn_now;
754 rtmn_diff = ev_rt_now - mn_now; 1301 rtmn_diff = ev_rt_now - mn_now;
755 1302
756 if (methods == EVMETHOD_AUTO) 1303 io_blocktime = 0.;
757 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1304 timeout_blocktime = 0.;
1305 backend = 0;
1306 backend_fd = -1;
1307 gotasync = 0;
1308#if EV_USE_INOTIFY
1309 fs_fd = -2;
1310#endif
1311
1312 /* pid check not overridable via env */
1313#ifndef _WIN32
1314 if (flags & EVFLAG_FORKCHECK)
1315 curpid = getpid ();
1316#endif
1317
1318 if (!(flags & EVFLAG_NOENV)
1319 && !enable_secure ()
1320 && getenv ("LIBEV_FLAGS"))
758 methods = atoi (getenv ("LIBEV_METHODS")); 1321 flags = atoi (getenv ("LIBEV_FLAGS"));
759 else
760 methods = EVMETHOD_ANY;
761 1322
762 method = 0; 1323 if (!(flags & 0x0000ffffU))
763#if EV_USE_WIN32 1324 flags |= ev_recommended_backends ();
764 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods); 1325
1326#if EV_USE_PORT
1327 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
765#endif 1328#endif
766#if EV_USE_KQUEUE 1329#if EV_USE_KQUEUE
767 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); 1330 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
768#endif 1331#endif
769#if EV_USE_EPOLL 1332#if EV_USE_EPOLL
770 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); 1333 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
771#endif 1334#endif
772#if EV_USE_POLL 1335#if EV_USE_POLL
773 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 1336 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
774#endif 1337#endif
775#if EV_USE_SELECT 1338#if EV_USE_SELECT
776 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 1339 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
777#endif 1340#endif
778 1341
779 ev_init (&sigev, sigcb); 1342 ev_init (&pipeev, pipecb);
780 ev_set_priority (&sigev, EV_MAXPRI); 1343 ev_set_priority (&pipeev, EV_MAXPRI);
781 } 1344 }
782} 1345}
783 1346
784void 1347static void noinline
785loop_destroy (EV_P) 1348loop_destroy (EV_P)
786{ 1349{
787 int i; 1350 int i;
788 1351
1352 if (ev_is_active (&pipeev))
1353 {
1354 ev_ref (EV_A); /* signal watcher */
1355 ev_io_stop (EV_A_ &pipeev);
1356
1357#if EV_USE_EVENTFD
1358 if (evfd >= 0)
1359 close (evfd);
1360#endif
1361
1362 if (evpipe [0] >= 0)
1363 {
1364 close (evpipe [0]);
1365 close (evpipe [1]);
1366 }
1367 }
1368
789#if EV_USE_WIN32 1369#if EV_USE_INOTIFY
790 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A); 1370 if (fs_fd >= 0)
1371 close (fs_fd);
1372#endif
1373
1374 if (backend_fd >= 0)
1375 close (backend_fd);
1376
1377#if EV_USE_PORT
1378 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
791#endif 1379#endif
792#if EV_USE_KQUEUE 1380#if EV_USE_KQUEUE
793 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1381 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
794#endif 1382#endif
795#if EV_USE_EPOLL 1383#if EV_USE_EPOLL
796 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1384 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
797#endif 1385#endif
798#if EV_USE_POLL 1386#if EV_USE_POLL
799 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1387 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
800#endif 1388#endif
801#if EV_USE_SELECT 1389#if EV_USE_SELECT
802 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1390 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
803#endif 1391#endif
804 1392
805 for (i = NUMPRI; i--; ) 1393 for (i = NUMPRI; i--; )
1394 {
806 array_free (pending, [i]); 1395 array_free (pending, [i]);
1396#if EV_IDLE_ENABLE
1397 array_free (idle, [i]);
1398#endif
1399 }
1400
1401 ev_free (anfds); anfdmax = 0;
807 1402
808 /* have to use the microsoft-never-gets-it-right macro */ 1403 /* have to use the microsoft-never-gets-it-right macro */
809 array_free_microshit (fdchange); 1404 array_free (fdchange, EMPTY);
810 array_free_microshit (timer); 1405 array_free (timer, EMPTY);
811#if EV_PERIODICS 1406#if EV_PERIODIC_ENABLE
812 array_free_microshit (periodic); 1407 array_free (periodic, EMPTY);
813#endif 1408#endif
814 array_free_microshit (idle); 1409#if EV_FORK_ENABLE
815 array_free_microshit (prepare); 1410 array_free (fork, EMPTY);
816 array_free_microshit (check); 1411#endif
1412 array_free (prepare, EMPTY);
1413 array_free (check, EMPTY);
1414#if EV_ASYNC_ENABLE
1415 array_free (async, EMPTY);
1416#endif
817 1417
818 method = 0; 1418 backend = 0;
819} 1419}
820 1420
821static void 1421#if EV_USE_INOTIFY
1422void inline_size infy_fork (EV_P);
1423#endif
1424
1425void inline_size
822loop_fork (EV_P) 1426loop_fork (EV_P)
823{ 1427{
1428#if EV_USE_PORT
1429 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1430#endif
1431#if EV_USE_KQUEUE
1432 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1433#endif
824#if EV_USE_EPOLL 1434#if EV_USE_EPOLL
825 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1435 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
826#endif 1436#endif
827#if EV_USE_KQUEUE 1437#if EV_USE_INOTIFY
828 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 1438 infy_fork (EV_A);
829#endif 1439#endif
830 1440
831 if (ev_is_active (&sigev)) 1441 if (ev_is_active (&pipeev))
832 { 1442 {
833 /* default loop */ 1443 /* this "locks" the handlers against writing to the pipe */
1444 /* while we modify the fd vars */
1445 gotsig = 1;
1446#if EV_ASYNC_ENABLE
1447 gotasync = 1;
1448#endif
834 1449
835 ev_ref (EV_A); 1450 ev_ref (EV_A);
836 ev_io_stop (EV_A_ &sigev); 1451 ev_io_stop (EV_A_ &pipeev);
1452
1453#if EV_USE_EVENTFD
1454 if (evfd >= 0)
1455 close (evfd);
1456#endif
1457
1458 if (evpipe [0] >= 0)
1459 {
837 close (sigpipe [0]); 1460 close (evpipe [0]);
838 close (sigpipe [1]); 1461 close (evpipe [1]);
1462 }
839 1463
840 while (pipe (sigpipe))
841 syserr ("(libev) error creating pipe");
842
843 siginit (EV_A); 1464 evpipe_init (EV_A);
1465 /* now iterate over everything, in case we missed something */
1466 pipecb (EV_A_ &pipeev, EV_READ);
844 } 1467 }
845 1468
846 postfork = 0; 1469 postfork = 0;
847} 1470}
1471
1472#if EV_MULTIPLICITY
1473
1474struct ev_loop *
1475ev_loop_new (unsigned int flags)
1476{
1477 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1478
1479 memset (loop, 0, sizeof (struct ev_loop));
1480
1481 loop_init (EV_A_ flags);
1482
1483 if (ev_backend (EV_A))
1484 return loop;
1485
1486 return 0;
1487}
1488
1489void
1490ev_loop_destroy (EV_P)
1491{
1492 loop_destroy (EV_A);
1493 ev_free (loop);
1494}
1495
1496void
1497ev_loop_fork (EV_P)
1498{
1499 postfork = 1; /* must be in line with ev_default_fork */
1500}
1501
1502#if EV_VERIFY
1503static void noinline
1504verify_watcher (EV_P_ W w)
1505{
1506 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1507
1508 if (w->pending)
1509 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1510}
1511
1512static void noinline
1513verify_heap (EV_P_ ANHE *heap, int N)
1514{
1515 int i;
1516
1517 for (i = HEAP0; i < N + HEAP0; ++i)
1518 {
1519 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1520 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1521 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1522
1523 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1524 }
1525}
1526
1527static void noinline
1528array_verify (EV_P_ W *ws, int cnt)
1529{
1530 while (cnt--)
1531 {
1532 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1533 verify_watcher (EV_A_ ws [cnt]);
1534 }
1535}
1536#endif
1537
1538void
1539ev_loop_verify (EV_P)
1540{
1541#if EV_VERIFY
1542 int i;
1543 WL w;
1544
1545 assert (activecnt >= -1);
1546
1547 assert (fdchangemax >= fdchangecnt);
1548 for (i = 0; i < fdchangecnt; ++i)
1549 assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1550
1551 assert (anfdmax >= 0);
1552 for (i = 0; i < anfdmax; ++i)
1553 for (w = anfds [i].head; w; w = w->next)
1554 {
1555 verify_watcher (EV_A_ (W)w);
1556 assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
1557 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1558 }
1559
1560 assert (timermax >= timercnt);
1561 verify_heap (EV_A_ timers, timercnt);
1562
1563#if EV_PERIODIC_ENABLE
1564 assert (periodicmax >= periodiccnt);
1565 verify_heap (EV_A_ periodics, periodiccnt);
1566#endif
1567
1568 for (i = NUMPRI; i--; )
1569 {
1570 assert (pendingmax [i] >= pendingcnt [i]);
1571#if EV_IDLE_ENABLE
1572 assert (idleall >= 0);
1573 assert (idlemax [i] >= idlecnt [i]);
1574 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1575#endif
1576 }
1577
1578#if EV_FORK_ENABLE
1579 assert (forkmax >= forkcnt);
1580 array_verify (EV_A_ (W *)forks, forkcnt);
1581#endif
1582
1583#if EV_ASYNC_ENABLE
1584 assert (asyncmax >= asynccnt);
1585 array_verify (EV_A_ (W *)asyncs, asynccnt);
1586#endif
1587
1588 assert (preparemax >= preparecnt);
1589 array_verify (EV_A_ (W *)prepares, preparecnt);
1590
1591 assert (checkmax >= checkcnt);
1592 array_verify (EV_A_ (W *)checks, checkcnt);
1593
1594# if 0
1595 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1596 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1597# endif
1598#endif
1599}
1600
1601#endif /* multiplicity */
848 1602
849#if EV_MULTIPLICITY 1603#if EV_MULTIPLICITY
850struct ev_loop * 1604struct ev_loop *
851ev_loop_new (int methods) 1605ev_default_loop_init (unsigned int flags)
852{
853 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
854
855 memset (loop, 0, sizeof (struct ev_loop));
856
857 loop_init (EV_A_ methods);
858
859 if (ev_method (EV_A))
860 return loop;
861
862 return 0;
863}
864
865void
866ev_loop_destroy (EV_P)
867{
868 loop_destroy (EV_A);
869 ev_free (loop);
870}
871
872void
873ev_loop_fork (EV_P)
874{
875 postfork = 1;
876}
877
878#endif
879
880#if EV_MULTIPLICITY
881struct ev_loop *
882#else 1606#else
883int 1607int
1608ev_default_loop (unsigned int flags)
884#endif 1609#endif
885ev_default_loop (int methods)
886{ 1610{
887 if (sigpipe [0] == sigpipe [1])
888 if (pipe (sigpipe))
889 return 0;
890
891 if (!default_loop) 1611 if (!ev_default_loop_ptr)
892 { 1612 {
893#if EV_MULTIPLICITY 1613#if EV_MULTIPLICITY
894 struct ev_loop *loop = default_loop = &default_loop_struct; 1614 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
895#else 1615#else
896 default_loop = 1; 1616 ev_default_loop_ptr = 1;
897#endif 1617#endif
898 1618
899 loop_init (EV_A_ methods); 1619 loop_init (EV_A_ flags);
900 1620
901 if (ev_method (EV_A)) 1621 if (ev_backend (EV_A))
902 { 1622 {
903 siginit (EV_A);
904
905#ifndef WIN32 1623#ifndef _WIN32
906 ev_signal_init (&childev, childcb, SIGCHLD); 1624 ev_signal_init (&childev, childcb, SIGCHLD);
907 ev_set_priority (&childev, EV_MAXPRI); 1625 ev_set_priority (&childev, EV_MAXPRI);
908 ev_signal_start (EV_A_ &childev); 1626 ev_signal_start (EV_A_ &childev);
909 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1627 ev_unref (EV_A); /* child watcher should not keep loop alive */
910#endif 1628#endif
911 } 1629 }
912 else 1630 else
913 default_loop = 0; 1631 ev_default_loop_ptr = 0;
914 } 1632 }
915 1633
916 return default_loop; 1634 return ev_default_loop_ptr;
917} 1635}
918 1636
919void 1637void
920ev_default_destroy (void) 1638ev_default_destroy (void)
921{ 1639{
922#if EV_MULTIPLICITY 1640#if EV_MULTIPLICITY
923 struct ev_loop *loop = default_loop; 1641 struct ev_loop *loop = ev_default_loop_ptr;
924#endif 1642#endif
925 1643
1644 ev_default_loop_ptr = 0;
1645
926#ifndef WIN32 1646#ifndef _WIN32
927 ev_ref (EV_A); /* child watcher */ 1647 ev_ref (EV_A); /* child watcher */
928 ev_signal_stop (EV_A_ &childev); 1648 ev_signal_stop (EV_A_ &childev);
929#endif 1649#endif
930 1650
931 ev_ref (EV_A); /* signal watcher */
932 ev_io_stop (EV_A_ &sigev);
933
934 close (sigpipe [0]); sigpipe [0] = 0;
935 close (sigpipe [1]); sigpipe [1] = 0;
936
937 loop_destroy (EV_A); 1651 loop_destroy (EV_A);
938} 1652}
939 1653
940void 1654void
941ev_default_fork (void) 1655ev_default_fork (void)
942{ 1656{
943#if EV_MULTIPLICITY 1657#if EV_MULTIPLICITY
944 struct ev_loop *loop = default_loop; 1658 struct ev_loop *loop = ev_default_loop_ptr;
945#endif 1659#endif
946 1660
947 if (method) 1661 if (backend)
948 postfork = 1; 1662 postfork = 1; /* must be in line with ev_loop_fork */
949} 1663}
950 1664
951/*****************************************************************************/ 1665/*****************************************************************************/
952 1666
953static int 1667void
954any_pending (EV_P) 1668ev_invoke (EV_P_ void *w, int revents)
955{ 1669{
956 int pri; 1670 EV_CB_INVOKE ((W)w, revents);
957
958 for (pri = NUMPRI; pri--; )
959 if (pendingcnt [pri])
960 return 1;
961
962 return 0;
963} 1671}
964 1672
965static void 1673void inline_speed
966call_pending (EV_P) 1674call_pending (EV_P)
967{ 1675{
968 int pri; 1676 int pri;
969 1677
970 for (pri = NUMPRI; pri--; ) 1678 for (pri = NUMPRI; pri--; )
971 while (pendingcnt [pri]) 1679 while (pendingcnt [pri])
972 { 1680 {
973 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1681 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
974 1682
975 if (p->w) 1683 if (expect_true (p->w))
976 { 1684 {
1685 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1686
977 p->w->pending = 0; 1687 p->w->pending = 0;
978 EV_CB_INVOKE (p->w, p->events); 1688 EV_CB_INVOKE (p->w, p->events);
1689 EV_FREQUENT_CHECK;
979 } 1690 }
980 } 1691 }
981} 1692}
982 1693
983static void 1694#if EV_IDLE_ENABLE
1695void inline_size
1696idle_reify (EV_P)
1697{
1698 if (expect_false (idleall))
1699 {
1700 int pri;
1701
1702 for (pri = NUMPRI; pri--; )
1703 {
1704 if (pendingcnt [pri])
1705 break;
1706
1707 if (idlecnt [pri])
1708 {
1709 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1710 break;
1711 }
1712 }
1713 }
1714}
1715#endif
1716
1717void inline_size
984timers_reify (EV_P) 1718timers_reify (EV_P)
985{ 1719{
1720 EV_FREQUENT_CHECK;
1721
986 while (timercnt && ((WT)timers [0])->at <= mn_now) 1722 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
987 { 1723 {
988 struct ev_timer *w = timers [0]; 1724 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
989 1725
990 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1726 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
991 1727
992 /* first reschedule or stop timer */ 1728 /* first reschedule or stop timer */
993 if (w->repeat) 1729 if (w->repeat)
994 { 1730 {
1731 ev_at (w) += w->repeat;
1732 if (ev_at (w) < mn_now)
1733 ev_at (w) = mn_now;
1734
995 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1735 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
996 1736
997 ((WT)w)->at += w->repeat; 1737 ANHE_at_cache (timers [HEAP0]);
998 if (((WT)w)->at < mn_now)
999 ((WT)w)->at = mn_now;
1000
1001 downheap ((WT *)timers, timercnt, 0); 1738 downheap (timers, timercnt, HEAP0);
1002 } 1739 }
1003 else 1740 else
1004 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1741 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1005 1742
1743 EV_FREQUENT_CHECK;
1006 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 1744 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1007 } 1745 }
1008} 1746}
1009 1747
1010#if EV_PERIODICS 1748#if EV_PERIODIC_ENABLE
1011static void 1749void inline_size
1012periodics_reify (EV_P) 1750periodics_reify (EV_P)
1013{ 1751{
1752 EV_FREQUENT_CHECK;
1753
1014 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 1754 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1015 { 1755 {
1016 struct ev_periodic *w = periodics [0]; 1756 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1017 1757
1018 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1758 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1019 1759
1020 /* first reschedule or stop timer */ 1760 /* first reschedule or stop timer */
1021 if (w->reschedule_cb) 1761 if (w->reschedule_cb)
1022 { 1762 {
1023 ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 1763 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1024 1764
1025 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 1765 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1766
1767 ANHE_at_cache (periodics [HEAP0]);
1026 downheap ((WT *)periodics, periodiccnt, 0); 1768 downheap (periodics, periodiccnt, HEAP0);
1027 } 1769 }
1028 else if (w->interval) 1770 else if (w->interval)
1029 { 1771 {
1030 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; 1772 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1031 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now)); 1773 /* if next trigger time is not sufficiently in the future, put it there */
1774 /* this might happen because of floating point inexactness */
1775 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1776 {
1777 ev_at (w) += w->interval;
1778
1779 /* if interval is unreasonably low we might still have a time in the past */
1780 /* so correct this. this will make the periodic very inexact, but the user */
1781 /* has effectively asked to get triggered more often than possible */
1782 if (ev_at (w) < ev_rt_now)
1783 ev_at (w) = ev_rt_now;
1784 }
1785
1786 ANHE_at_cache (periodics [HEAP0]);
1032 downheap ((WT *)periodics, periodiccnt, 0); 1787 downheap (periodics, periodiccnt, HEAP0);
1033 } 1788 }
1034 else 1789 else
1035 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1790 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1036 1791
1792 EV_FREQUENT_CHECK;
1037 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 1793 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1038 } 1794 }
1039} 1795}
1040 1796
1041static void 1797static void noinline
1042periodics_reschedule (EV_P) 1798periodics_reschedule (EV_P)
1043{ 1799{
1044 int i; 1800 int i;
1045 1801
1046 /* adjust periodics after time jump */ 1802 /* adjust periodics after time jump */
1047 for (i = 0; i < periodiccnt; ++i) 1803 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1048 { 1804 {
1049 struct ev_periodic *w = periodics [i]; 1805 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1050 1806
1051 if (w->reschedule_cb) 1807 if (w->reschedule_cb)
1052 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 1808 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1053 else if (w->interval) 1809 else if (w->interval)
1054 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 1810 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1811
1812 ANHE_at_cache (periodics [i]);
1813 }
1814
1815 reheap (periodics, periodiccnt);
1816}
1817#endif
1818
1819void inline_speed
1820time_update (EV_P_ ev_tstamp max_block)
1821{
1822 int i;
1823
1824#if EV_USE_MONOTONIC
1825 if (expect_true (have_monotonic))
1055 } 1826 {
1827 ev_tstamp odiff = rtmn_diff;
1056 1828
1057 /* now rebuild the heap */
1058 for (i = periodiccnt >> 1; i--; )
1059 downheap ((WT *)periodics, periodiccnt, i);
1060}
1061#endif
1062
1063inline int
1064time_update_monotonic (EV_P)
1065{
1066 mn_now = get_clock (); 1829 mn_now = get_clock ();
1067 1830
1831 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1832 /* interpolate in the meantime */
1068 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 1833 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1069 { 1834 {
1070 ev_rt_now = rtmn_diff + mn_now; 1835 ev_rt_now = rtmn_diff + mn_now;
1071 return 0; 1836 return;
1072 } 1837 }
1073 else 1838
1074 {
1075 now_floor = mn_now; 1839 now_floor = mn_now;
1076 ev_rt_now = ev_time (); 1840 ev_rt_now = ev_time ();
1077 return 1;
1078 }
1079}
1080 1841
1081static void 1842 /* loop a few times, before making important decisions.
1082time_update (EV_P) 1843 * on the choice of "4": one iteration isn't enough,
1083{ 1844 * in case we get preempted during the calls to
1084 int i; 1845 * ev_time and get_clock. a second call is almost guaranteed
1085 1846 * to succeed in that case, though. and looping a few more times
1086#if EV_USE_MONOTONIC 1847 * doesn't hurt either as we only do this on time-jumps or
1087 if (expect_true (have_monotonic)) 1848 * in the unlikely event of having been preempted here.
1088 { 1849 */
1089 if (time_update_monotonic (EV_A)) 1850 for (i = 4; --i; )
1090 { 1851 {
1091 ev_tstamp odiff = rtmn_diff; 1852 rtmn_diff = ev_rt_now - mn_now;
1092 1853
1093 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1854 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1855 return; /* all is well */
1856
1857 ev_rt_now = ev_time ();
1858 mn_now = get_clock ();
1859 now_floor = mn_now;
1860 }
1861
1862# if EV_PERIODIC_ENABLE
1863 periodics_reschedule (EV_A);
1864# endif
1865 /* no timer adjustment, as the monotonic clock doesn't jump */
1866 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1867 }
1868 else
1869#endif
1870 {
1871 ev_rt_now = ev_time ();
1872
1873 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1874 {
1875#if EV_PERIODIC_ENABLE
1876 periodics_reschedule (EV_A);
1877#endif
1878 /* adjust timers. this is easy, as the offset is the same for all of them */
1879 for (i = 0; i < timercnt; ++i)
1094 { 1880 {
1095 rtmn_diff = ev_rt_now - mn_now; 1881 ANHE *he = timers + i + HEAP0;
1096 1882 ANHE_w (*he)->at += ev_rt_now - mn_now;
1097 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1883 ANHE_at_cache (*he);
1098 return; /* all is well */
1099
1100 ev_rt_now = ev_time ();
1101 mn_now = get_clock ();
1102 now_floor = mn_now;
1103 } 1884 }
1104
1105# if EV_PERIODICS
1106 periodics_reschedule (EV_A);
1107# endif
1108 /* no timer adjustment, as the monotonic clock doesn't jump */
1109 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1110 } 1885 }
1111 }
1112 else
1113#endif
1114 {
1115 ev_rt_now = ev_time ();
1116
1117 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1118 {
1119#if EV_PERIODICS
1120 periodics_reschedule (EV_A);
1121#endif
1122
1123 /* adjust timers. this is easy, as the offset is the same for all */
1124 for (i = 0; i < timercnt; ++i)
1125 ((WT)timers [i])->at += ev_rt_now - mn_now;
1126 }
1127 1886
1128 mn_now = ev_rt_now; 1887 mn_now = ev_rt_now;
1129 } 1888 }
1130} 1889}
1131 1890
… …
1139ev_unref (EV_P) 1898ev_unref (EV_P)
1140{ 1899{
1141 --activecnt; 1900 --activecnt;
1142} 1901}
1143 1902
1903void
1904ev_now_update (EV_P)
1905{
1906 time_update (EV_A_ 1e100);
1907}
1908
1144static int loop_done; 1909static int loop_done;
1145 1910
1146void 1911void
1147ev_loop (EV_P_ int flags) 1912ev_loop (EV_P_ int flags)
1148{ 1913{
1149 double block; 1914 loop_done = EVUNLOOP_CANCEL;
1150 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1915
1916 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1151 1917
1152 do 1918 do
1153 { 1919 {
1920#if EV_VERIFY >= 2
1921 ev_loop_verify (EV_A);
1922#endif
1923
1924#ifndef _WIN32
1925 if (expect_false (curpid)) /* penalise the forking check even more */
1926 if (expect_false (getpid () != curpid))
1927 {
1928 curpid = getpid ();
1929 postfork = 1;
1930 }
1931#endif
1932
1933#if EV_FORK_ENABLE
1934 /* we might have forked, so queue fork handlers */
1935 if (expect_false (postfork))
1936 if (forkcnt)
1937 {
1938 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1939 call_pending (EV_A);
1940 }
1941#endif
1942
1154 /* queue check watchers (and execute them) */ 1943 /* queue prepare watchers (and execute them) */
1155 if (expect_false (preparecnt)) 1944 if (expect_false (preparecnt))
1156 { 1945 {
1157 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1946 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1158 call_pending (EV_A); 1947 call_pending (EV_A);
1159 } 1948 }
1160 1949
1950 if (expect_false (!activecnt))
1951 break;
1952
1161 /* we might have forked, so reify kernel state if necessary */ 1953 /* we might have forked, so reify kernel state if necessary */
1162 if (expect_false (postfork)) 1954 if (expect_false (postfork))
1163 loop_fork (EV_A); 1955 loop_fork (EV_A);
1164 1956
1165 /* update fd-related kernel structures */ 1957 /* update fd-related kernel structures */
1166 fd_reify (EV_A); 1958 fd_reify (EV_A);
1167 1959
1168 /* calculate blocking time */ 1960 /* calculate blocking time */
1961 {
1962 ev_tstamp waittime = 0.;
1963 ev_tstamp sleeptime = 0.;
1169 1964
1170 /* we only need this for !monotonic clock or timers, but as we basically 1965 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1171 always have timers, we just calculate it always */
1172#if EV_USE_MONOTONIC
1173 if (expect_true (have_monotonic))
1174 time_update_monotonic (EV_A);
1175 else
1176#endif
1177 { 1966 {
1178 ev_rt_now = ev_time (); 1967 /* update time to cancel out callback processing overhead */
1179 mn_now = ev_rt_now; 1968 time_update (EV_A_ 1e100);
1180 }
1181 1969
1182 if (flags & EVLOOP_NONBLOCK || idlecnt)
1183 block = 0.;
1184 else
1185 {
1186 block = MAX_BLOCKTIME; 1970 waittime = MAX_BLOCKTIME;
1187 1971
1188 if (timercnt) 1972 if (timercnt)
1189 { 1973 {
1190 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 1974 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1191 if (block > to) block = to; 1975 if (waittime > to) waittime = to;
1192 } 1976 }
1193 1977
1194#if EV_PERIODICS 1978#if EV_PERIODIC_ENABLE
1195 if (periodiccnt) 1979 if (periodiccnt)
1196 { 1980 {
1197 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; 1981 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1198 if (block > to) block = to; 1982 if (waittime > to) waittime = to;
1199 } 1983 }
1200#endif 1984#endif
1201 1985
1202 if (block < 0.) block = 0.; 1986 if (expect_false (waittime < timeout_blocktime))
1987 waittime = timeout_blocktime;
1988
1989 sleeptime = waittime - backend_fudge;
1990
1991 if (expect_true (sleeptime > io_blocktime))
1992 sleeptime = io_blocktime;
1993
1994 if (sleeptime)
1995 {
1996 ev_sleep (sleeptime);
1997 waittime -= sleeptime;
1998 }
1203 } 1999 }
1204 2000
1205 method_poll (EV_A_ block); 2001 ++loop_count;
2002 backend_poll (EV_A_ waittime);
1206 2003
1207 /* update ev_rt_now, do magic */ 2004 /* update ev_rt_now, do magic */
1208 time_update (EV_A); 2005 time_update (EV_A_ waittime + sleeptime);
2006 }
1209 2007
1210 /* queue pending timers and reschedule them */ 2008 /* queue pending timers and reschedule them */
1211 timers_reify (EV_A); /* relative timers called last */ 2009 timers_reify (EV_A); /* relative timers called last */
1212#if EV_PERIODICS 2010#if EV_PERIODIC_ENABLE
1213 periodics_reify (EV_A); /* absolute timers called first */ 2011 periodics_reify (EV_A); /* absolute timers called first */
1214#endif 2012#endif
1215 2013
2014#if EV_IDLE_ENABLE
1216 /* queue idle watchers unless io or timers are pending */ 2015 /* queue idle watchers unless other events are pending */
1217 if (idlecnt && !any_pending (EV_A)) 2016 idle_reify (EV_A);
1218 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2017#endif
1219 2018
1220 /* queue check watchers, to be executed first */ 2019 /* queue check watchers, to be executed first */
1221 if (checkcnt) 2020 if (expect_false (checkcnt))
1222 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2021 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1223 2022
1224 call_pending (EV_A); 2023 call_pending (EV_A);
1225 } 2024 }
1226 while (activecnt && !loop_done); 2025 while (expect_true (
2026 activecnt
2027 && !loop_done
2028 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2029 ));
1227 2030
1228 if (loop_done != 2) 2031 if (loop_done == EVUNLOOP_ONE)
1229 loop_done = 0; 2032 loop_done = EVUNLOOP_CANCEL;
1230} 2033}
1231 2034
1232void 2035void
1233ev_unloop (EV_P_ int how) 2036ev_unloop (EV_P_ int how)
1234{ 2037{
1235 loop_done = how; 2038 loop_done = how;
1236} 2039}
1237 2040
1238/*****************************************************************************/ 2041/*****************************************************************************/
1239 2042
1240inline void 2043void inline_size
1241wlist_add (WL *head, WL elem) 2044wlist_add (WL *head, WL elem)
1242{ 2045{
1243 elem->next = *head; 2046 elem->next = *head;
1244 *head = elem; 2047 *head = elem;
1245} 2048}
1246 2049
1247inline void 2050void inline_size
1248wlist_del (WL *head, WL elem) 2051wlist_del (WL *head, WL elem)
1249{ 2052{
1250 while (*head) 2053 while (*head)
1251 { 2054 {
1252 if (*head == elem) 2055 if (*head == elem)
… …
1257 2060
1258 head = &(*head)->next; 2061 head = &(*head)->next;
1259 } 2062 }
1260} 2063}
1261 2064
1262inline void 2065void inline_speed
1263ev_clear_pending (EV_P_ W w) 2066clear_pending (EV_P_ W w)
1264{ 2067{
1265 if (w->pending) 2068 if (w->pending)
1266 { 2069 {
1267 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2070 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1268 w->pending = 0; 2071 w->pending = 0;
1269 } 2072 }
1270} 2073}
1271 2074
1272inline void 2075int
2076ev_clear_pending (EV_P_ void *w)
2077{
2078 W w_ = (W)w;
2079 int pending = w_->pending;
2080
2081 if (expect_true (pending))
2082 {
2083 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2084 w_->pending = 0;
2085 p->w = 0;
2086 return p->events;
2087 }
2088 else
2089 return 0;
2090}
2091
2092void inline_size
2093pri_adjust (EV_P_ W w)
2094{
2095 int pri = w->priority;
2096 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2097 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2098 w->priority = pri;
2099}
2100
2101void inline_speed
1273ev_start (EV_P_ W w, int active) 2102ev_start (EV_P_ W w, int active)
1274{ 2103{
1275 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2104 pri_adjust (EV_A_ w);
1276 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1277
1278 w->active = active; 2105 w->active = active;
1279 ev_ref (EV_A); 2106 ev_ref (EV_A);
1280} 2107}
1281 2108
1282inline void 2109void inline_size
1283ev_stop (EV_P_ W w) 2110ev_stop (EV_P_ W w)
1284{ 2111{
1285 ev_unref (EV_A); 2112 ev_unref (EV_A);
1286 w->active = 0; 2113 w->active = 0;
1287} 2114}
1288 2115
1289/*****************************************************************************/ 2116/*****************************************************************************/
1290 2117
1291void 2118void noinline
1292ev_io_start (EV_P_ struct ev_io *w) 2119ev_io_start (EV_P_ ev_io *w)
1293{ 2120{
1294 int fd = w->fd; 2121 int fd = w->fd;
1295 2122
1296 if (ev_is_active (w)) 2123 if (expect_false (ev_is_active (w)))
1297 return; 2124 return;
1298 2125
1299 assert (("ev_io_start called with negative fd", fd >= 0)); 2126 assert (("ev_io_start called with negative fd", fd >= 0));
2127 assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));
2128
2129 EV_FREQUENT_CHECK;
1300 2130
1301 ev_start (EV_A_ (W)w, 1); 2131 ev_start (EV_A_ (W)w, 1);
1302 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2132 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1303 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2133 wlist_add (&anfds[fd].head, (WL)w);
1304 2134
1305 fd_change (EV_A_ fd); 2135 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1306} 2136 w->events &= ~EV_IOFDSET;
1307 2137
1308void 2138 EV_FREQUENT_CHECK;
2139}
2140
2141void noinline
1309ev_io_stop (EV_P_ struct ev_io *w) 2142ev_io_stop (EV_P_ ev_io *w)
1310{ 2143{
1311 ev_clear_pending (EV_A_ (W)w); 2144 clear_pending (EV_A_ (W)w);
1312 if (!ev_is_active (w)) 2145 if (expect_false (!ev_is_active (w)))
1313 return; 2146 return;
1314 2147
1315 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2148 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1316 2149
2150 EV_FREQUENT_CHECK;
2151
1317 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2152 wlist_del (&anfds[w->fd].head, (WL)w);
1318 ev_stop (EV_A_ (W)w); 2153 ev_stop (EV_A_ (W)w);
1319 2154
1320 fd_change (EV_A_ w->fd); 2155 fd_change (EV_A_ w->fd, 1);
1321}
1322 2156
1323void 2157 EV_FREQUENT_CHECK;
2158}
2159
2160void noinline
1324ev_timer_start (EV_P_ struct ev_timer *w) 2161ev_timer_start (EV_P_ ev_timer *w)
1325{ 2162{
1326 if (ev_is_active (w)) 2163 if (expect_false (ev_is_active (w)))
1327 return; 2164 return;
1328 2165
1329 ((WT)w)->at += mn_now; 2166 ev_at (w) += mn_now;
1330 2167
1331 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2168 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1332 2169
2170 EV_FREQUENT_CHECK;
2171
2172 ++timercnt;
1333 ev_start (EV_A_ (W)w, ++timercnt); 2173 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1334 array_needsize (struct ev_timer *, timers, timermax, timercnt, (void)); 2174 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1335 timers [timercnt - 1] = w; 2175 ANHE_w (timers [ev_active (w)]) = (WT)w;
1336 upheap ((WT *)timers, timercnt - 1); 2176 ANHE_at_cache (timers [ev_active (w)]);
2177 upheap (timers, ev_active (w));
1337 2178
2179 EV_FREQUENT_CHECK;
2180
1338 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2181 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1339} 2182}
1340 2183
1341void 2184void noinline
1342ev_timer_stop (EV_P_ struct ev_timer *w) 2185ev_timer_stop (EV_P_ ev_timer *w)
1343{ 2186{
1344 ev_clear_pending (EV_A_ (W)w); 2187 clear_pending (EV_A_ (W)w);
1345 if (!ev_is_active (w)) 2188 if (expect_false (!ev_is_active (w)))
1346 return; 2189 return;
1347 2190
2191 EV_FREQUENT_CHECK;
2192
2193 {
2194 int active = ev_active (w);
2195
1348 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2196 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1349 2197
1350 if (((W)w)->active < timercnt--) 2198 --timercnt;
2199
2200 if (expect_true (active < timercnt + HEAP0))
1351 { 2201 {
1352 timers [((W)w)->active - 1] = timers [timercnt]; 2202 timers [active] = timers [timercnt + HEAP0];
1353 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2203 adjustheap (timers, timercnt, active);
1354 } 2204 }
2205 }
1355 2206
1356 ((WT)w)->at -= mn_now; 2207 EV_FREQUENT_CHECK;
2208
2209 ev_at (w) -= mn_now;
1357 2210
1358 ev_stop (EV_A_ (W)w); 2211 ev_stop (EV_A_ (W)w);
1359} 2212}
1360 2213
1361void 2214void noinline
1362ev_timer_again (EV_P_ struct ev_timer *w) 2215ev_timer_again (EV_P_ ev_timer *w)
1363{ 2216{
2217 EV_FREQUENT_CHECK;
2218
1364 if (ev_is_active (w)) 2219 if (ev_is_active (w))
1365 { 2220 {
1366 if (w->repeat) 2221 if (w->repeat)
1367 { 2222 {
1368 ((WT)w)->at = mn_now + w->repeat; 2223 ev_at (w) = mn_now + w->repeat;
2224 ANHE_at_cache (timers [ev_active (w)]);
1369 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2225 adjustheap (timers, timercnt, ev_active (w));
1370 } 2226 }
1371 else 2227 else
1372 ev_timer_stop (EV_A_ w); 2228 ev_timer_stop (EV_A_ w);
1373 } 2229 }
1374 else if (w->repeat) 2230 else if (w->repeat)
2231 {
2232 ev_at (w) = w->repeat;
1375 ev_timer_start (EV_A_ w); 2233 ev_timer_start (EV_A_ w);
1376} 2234 }
1377 2235
2236 EV_FREQUENT_CHECK;
2237}
2238
1378#if EV_PERIODICS 2239#if EV_PERIODIC_ENABLE
1379void 2240void noinline
1380ev_periodic_start (EV_P_ struct ev_periodic *w) 2241ev_periodic_start (EV_P_ ev_periodic *w)
1381{ 2242{
1382 if (ev_is_active (w)) 2243 if (expect_false (ev_is_active (w)))
1383 return; 2244 return;
1384 2245
1385 if (w->reschedule_cb) 2246 if (w->reschedule_cb)
1386 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2247 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1387 else if (w->interval) 2248 else if (w->interval)
1388 { 2249 {
1389 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2250 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1390 /* this formula differs from the one in periodic_reify because we do not always round up */ 2251 /* this formula differs from the one in periodic_reify because we do not always round up */
1391 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2252 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1392 } 2253 }
2254 else
2255 ev_at (w) = w->offset;
1393 2256
2257 EV_FREQUENT_CHECK;
2258
2259 ++periodiccnt;
1394 ev_start (EV_A_ (W)w, ++periodiccnt); 2260 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1395 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); 2261 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1396 periodics [periodiccnt - 1] = w; 2262 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1397 upheap ((WT *)periodics, periodiccnt - 1); 2263 ANHE_at_cache (periodics [ev_active (w)]);
2264 upheap (periodics, ev_active (w));
1398 2265
2266 EV_FREQUENT_CHECK;
2267
1399 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2268 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1400} 2269}
1401 2270
1402void 2271void noinline
1403ev_periodic_stop (EV_P_ struct ev_periodic *w) 2272ev_periodic_stop (EV_P_ ev_periodic *w)
1404{ 2273{
1405 ev_clear_pending (EV_A_ (W)w); 2274 clear_pending (EV_A_ (W)w);
1406 if (!ev_is_active (w)) 2275 if (expect_false (!ev_is_active (w)))
1407 return; 2276 return;
1408 2277
2278 EV_FREQUENT_CHECK;
2279
2280 {
2281 int active = ev_active (w);
2282
1409 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2283 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1410 2284
1411 if (((W)w)->active < periodiccnt--) 2285 --periodiccnt;
2286
2287 if (expect_true (active < periodiccnt + HEAP0))
1412 { 2288 {
1413 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2289 periodics [active] = periodics [periodiccnt + HEAP0];
1414 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2290 adjustheap (periodics, periodiccnt, active);
1415 } 2291 }
2292 }
2293
2294 EV_FREQUENT_CHECK;
1416 2295
1417 ev_stop (EV_A_ (W)w); 2296 ev_stop (EV_A_ (W)w);
1418} 2297}
1419 2298
1420void 2299void noinline
1421ev_periodic_again (EV_P_ struct ev_periodic *w) 2300ev_periodic_again (EV_P_ ev_periodic *w)
1422{ 2301{
1423 /* TODO: use adjustheap and recalculation */ 2302 /* TODO: use adjustheap and recalculation */
1424 ev_periodic_stop (EV_A_ w); 2303 ev_periodic_stop (EV_A_ w);
1425 ev_periodic_start (EV_A_ w); 2304 ev_periodic_start (EV_A_ w);
1426} 2305}
1427#endif 2306#endif
1428 2307
1429void
1430ev_idle_start (EV_P_ struct ev_idle *w)
1431{
1432 if (ev_is_active (w))
1433 return;
1434
1435 ev_start (EV_A_ (W)w, ++idlecnt);
1436 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1437 idles [idlecnt - 1] = w;
1438}
1439
1440void
1441ev_idle_stop (EV_P_ struct ev_idle *w)
1442{
1443 ev_clear_pending (EV_A_ (W)w);
1444 if (ev_is_active (w))
1445 return;
1446
1447 idles [((W)w)->active - 1] = idles [--idlecnt];
1448 ev_stop (EV_A_ (W)w);
1449}
1450
1451void
1452ev_prepare_start (EV_P_ struct ev_prepare *w)
1453{
1454 if (ev_is_active (w))
1455 return;
1456
1457 ev_start (EV_A_ (W)w, ++preparecnt);
1458 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1459 prepares [preparecnt - 1] = w;
1460}
1461
1462void
1463ev_prepare_stop (EV_P_ struct ev_prepare *w)
1464{
1465 ev_clear_pending (EV_A_ (W)w);
1466 if (ev_is_active (w))
1467 return;
1468
1469 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1470 ev_stop (EV_A_ (W)w);
1471}
1472
1473void
1474ev_check_start (EV_P_ struct ev_check *w)
1475{
1476 if (ev_is_active (w))
1477 return;
1478
1479 ev_start (EV_A_ (W)w, ++checkcnt);
1480 array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1481 checks [checkcnt - 1] = w;
1482}
1483
1484void
1485ev_check_stop (EV_P_ struct ev_check *w)
1486{
1487 ev_clear_pending (EV_A_ (W)w);
1488 if (!ev_is_active (w))
1489 return;
1490
1491 checks [((W)w)->active - 1] = checks [--checkcnt];
1492 ev_stop (EV_A_ (W)w);
1493}
1494
1495#ifndef SA_RESTART 2308#ifndef SA_RESTART
1496# define SA_RESTART 0 2309# define SA_RESTART 0
1497#endif 2310#endif
1498 2311
1499void 2312void noinline
1500ev_signal_start (EV_P_ struct ev_signal *w) 2313ev_signal_start (EV_P_ ev_signal *w)
1501{ 2314{
1502#if EV_MULTIPLICITY 2315#if EV_MULTIPLICITY
1503 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2316 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1504#endif 2317#endif
1505 if (ev_is_active (w)) 2318 if (expect_false (ev_is_active (w)))
1506 return; 2319 return;
1507 2320
1508 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2321 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1509 2322
2323 evpipe_init (EV_A);
2324
2325 EV_FREQUENT_CHECK;
2326
2327 {
2328#ifndef _WIN32
2329 sigset_t full, prev;
2330 sigfillset (&full);
2331 sigprocmask (SIG_SETMASK, &full, &prev);
2332#endif
2333
2334 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2335
2336#ifndef _WIN32
2337 sigprocmask (SIG_SETMASK, &prev, 0);
2338#endif
2339 }
2340
1510 ev_start (EV_A_ (W)w, 1); 2341 ev_start (EV_A_ (W)w, 1);
1511 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1512 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2342 wlist_add (&signals [w->signum - 1].head, (WL)w);
1513 2343
1514 if (!((WL)w)->next) 2344 if (!((WL)w)->next)
1515 { 2345 {
1516#if WIN32 2346#if _WIN32
1517 signal (w->signum, sighandler); 2347 signal (w->signum, ev_sighandler);
1518#else 2348#else
1519 struct sigaction sa; 2349 struct sigaction sa;
1520 sa.sa_handler = sighandler; 2350 sa.sa_handler = ev_sighandler;
1521 sigfillset (&sa.sa_mask); 2351 sigfillset (&sa.sa_mask);
1522 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2352 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1523 sigaction (w->signum, &sa, 0); 2353 sigaction (w->signum, &sa, 0);
1524#endif 2354#endif
1525 } 2355 }
1526}
1527 2356
1528void 2357 EV_FREQUENT_CHECK;
2358}
2359
2360void noinline
1529ev_signal_stop (EV_P_ struct ev_signal *w) 2361ev_signal_stop (EV_P_ ev_signal *w)
1530{ 2362{
1531 ev_clear_pending (EV_A_ (W)w); 2363 clear_pending (EV_A_ (W)w);
1532 if (!ev_is_active (w)) 2364 if (expect_false (!ev_is_active (w)))
1533 return; 2365 return;
1534 2366
2367 EV_FREQUENT_CHECK;
2368
1535 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2369 wlist_del (&signals [w->signum - 1].head, (WL)w);
1536 ev_stop (EV_A_ (W)w); 2370 ev_stop (EV_A_ (W)w);
1537 2371
1538 if (!signals [w->signum - 1].head) 2372 if (!signals [w->signum - 1].head)
1539 signal (w->signum, SIG_DFL); 2373 signal (w->signum, SIG_DFL);
1540}
1541 2374
2375 EV_FREQUENT_CHECK;
2376}
2377
1542void 2378void
1543ev_child_start (EV_P_ struct ev_child *w) 2379ev_child_start (EV_P_ ev_child *w)
1544{ 2380{
1545#if EV_MULTIPLICITY 2381#if EV_MULTIPLICITY
1546 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2382 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1547#endif 2383#endif
1548 if (ev_is_active (w)) 2384 if (expect_false (ev_is_active (w)))
1549 return; 2385 return;
1550 2386
2387 EV_FREQUENT_CHECK;
2388
1551 ev_start (EV_A_ (W)w, 1); 2389 ev_start (EV_A_ (W)w, 1);
1552 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2390 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1553}
1554 2391
2392 EV_FREQUENT_CHECK;
2393}
2394
1555void 2395void
1556ev_child_stop (EV_P_ struct ev_child *w) 2396ev_child_stop (EV_P_ ev_child *w)
1557{ 2397{
1558 ev_clear_pending (EV_A_ (W)w); 2398 clear_pending (EV_A_ (W)w);
1559 if (!ev_is_active (w)) 2399 if (expect_false (!ev_is_active (w)))
1560 return; 2400 return;
1561 2401
2402 EV_FREQUENT_CHECK;
2403
1562 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2404 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1563 ev_stop (EV_A_ (W)w); 2405 ev_stop (EV_A_ (W)w);
2406
2407 EV_FREQUENT_CHECK;
1564} 2408}
2409
2410#if EV_STAT_ENABLE
2411
2412# ifdef _WIN32
2413# undef lstat
2414# define lstat(a,b) _stati64 (a,b)
2415# endif
2416
2417#define DEF_STAT_INTERVAL 5.0074891
2418#define MIN_STAT_INTERVAL 0.1074891
2419
2420static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2421
2422#if EV_USE_INOTIFY
2423# define EV_INOTIFY_BUFSIZE 8192
2424
2425static void noinline
2426infy_add (EV_P_ ev_stat *w)
2427{
2428 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);
2429
2430 if (w->wd < 0)
2431 {
2432 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2433
2434 /* monitor some parent directory for speedup hints */
2435 /* note that exceeding the hardcoded limit is not a correctness issue, */
2436 /* but an efficiency issue only */
2437 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2438 {
2439 char path [4096];
2440 strcpy (path, w->path);
2441
2442 do
2443 {
2444 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2445 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2446
2447 char *pend = strrchr (path, '/');
2448
2449 if (!pend)
2450 break; /* whoops, no '/', complain to your admin */
2451
2452 *pend = 0;
2453 w->wd = inotify_add_watch (fs_fd, path, mask);
2454 }
2455 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2456 }
2457 }
2458 else
2459 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2460
2461 if (w->wd >= 0)
2462 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2463}
2464
2465static void noinline
2466infy_del (EV_P_ ev_stat *w)
2467{
2468 int slot;
2469 int wd = w->wd;
2470
2471 if (wd < 0)
2472 return;
2473
2474 w->wd = -2;
2475 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2476 wlist_del (&fs_hash [slot].head, (WL)w);
2477
2478 /* remove this watcher, if others are watching it, they will rearm */
2479 inotify_rm_watch (fs_fd, wd);
2480}
2481
2482static void noinline
2483infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2484{
2485 if (slot < 0)
2486 /* overflow, need to check for all hash slots */
2487 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2488 infy_wd (EV_A_ slot, wd, ev);
2489 else
2490 {
2491 WL w_;
2492
2493 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2494 {
2495 ev_stat *w = (ev_stat *)w_;
2496 w_ = w_->next; /* lets us remove this watcher and all before it */
2497
2498 if (w->wd == wd || wd == -1)
2499 {
2500 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2501 {
2502 w->wd = -1;
2503 infy_add (EV_A_ w); /* re-add, no matter what */
2504 }
2505
2506 stat_timer_cb (EV_A_ &w->timer, 0);
2507 }
2508 }
2509 }
2510}
2511
2512static void
2513infy_cb (EV_P_ ev_io *w, int revents)
2514{
2515 char buf [EV_INOTIFY_BUFSIZE];
2516 struct inotify_event *ev = (struct inotify_event *)buf;
2517 int ofs;
2518 int len = read (fs_fd, buf, sizeof (buf));
2519
2520 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2521 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2522}
2523
2524void inline_size
2525infy_init (EV_P)
2526{
2527 if (fs_fd != -2)
2528 return;
2529
2530 /* kernels < 2.6.25 are borked
2531 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2532 */
2533 {
2534 struct utsname buf;
2535 int major, minor, micro;
2536
2537 fs_fd = -1;
2538
2539 if (uname (&buf))
2540 return;
2541
2542 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2543 return;
2544
2545 if (major < 2
2546 || (major == 2 && minor < 6)
2547 || (major == 2 && minor == 6 && micro < 25))
2548 return;
2549 }
2550
2551 fs_fd = inotify_init ();
2552
2553 if (fs_fd >= 0)
2554 {
2555 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2556 ev_set_priority (&fs_w, EV_MAXPRI);
2557 ev_io_start (EV_A_ &fs_w);
2558 }
2559}
2560
2561void inline_size
2562infy_fork (EV_P)
2563{
2564 int slot;
2565
2566 if (fs_fd < 0)
2567 return;
2568
2569 close (fs_fd);
2570 fs_fd = inotify_init ();
2571
2572 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2573 {
2574 WL w_ = fs_hash [slot].head;
2575 fs_hash [slot].head = 0;
2576
2577 while (w_)
2578 {
2579 ev_stat *w = (ev_stat *)w_;
2580 w_ = w_->next; /* lets us add this watcher */
2581
2582 w->wd = -1;
2583
2584 if (fs_fd >= 0)
2585 infy_add (EV_A_ w); /* re-add, no matter what */
2586 else
2587 ev_timer_start (EV_A_ &w->timer);
2588 }
2589 }
2590}
2591
2592#endif
2593
2594#ifdef _WIN32
2595# define EV_LSTAT(p,b) _stati64 (p, b)
2596#else
2597# define EV_LSTAT(p,b) lstat (p, b)
2598#endif
2599
2600void
2601ev_stat_stat (EV_P_ ev_stat *w)
2602{
2603 if (lstat (w->path, &w->attr) < 0)
2604 w->attr.st_nlink = 0;
2605 else if (!w->attr.st_nlink)
2606 w->attr.st_nlink = 1;
2607}
2608
2609static void noinline
2610stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2611{
2612 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2613
2614 /* we copy this here each the time so that */
2615 /* prev has the old value when the callback gets invoked */
2616 w->prev = w->attr;
2617 ev_stat_stat (EV_A_ w);
2618
2619 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2620 if (
2621 w->prev.st_dev != w->attr.st_dev
2622 || w->prev.st_ino != w->attr.st_ino
2623 || w->prev.st_mode != w->attr.st_mode
2624 || w->prev.st_nlink != w->attr.st_nlink
2625 || w->prev.st_uid != w->attr.st_uid
2626 || w->prev.st_gid != w->attr.st_gid
2627 || w->prev.st_rdev != w->attr.st_rdev
2628 || w->prev.st_size != w->attr.st_size
2629 || w->prev.st_atime != w->attr.st_atime
2630 || w->prev.st_mtime != w->attr.st_mtime
2631 || w->prev.st_ctime != w->attr.st_ctime
2632 ) {
2633 #if EV_USE_INOTIFY
2634 if (fs_fd >= 0)
2635 {
2636 infy_del (EV_A_ w);
2637 infy_add (EV_A_ w);
2638 ev_stat_stat (EV_A_ w); /* avoid race... */
2639 }
2640 #endif
2641
2642 ev_feed_event (EV_A_ w, EV_STAT);
2643 }
2644}
2645
2646void
2647ev_stat_start (EV_P_ ev_stat *w)
2648{
2649 if (expect_false (ev_is_active (w)))
2650 return;
2651
2652 /* since we use memcmp, we need to clear any padding data etc. */
2653 memset (&w->prev, 0, sizeof (ev_statdata));
2654 memset (&w->attr, 0, sizeof (ev_statdata));
2655
2656 ev_stat_stat (EV_A_ w);
2657
2658 if (w->interval < MIN_STAT_INTERVAL)
2659 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2660
2661 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2662 ev_set_priority (&w->timer, ev_priority (w));
2663
2664#if EV_USE_INOTIFY
2665 infy_init (EV_A);
2666
2667 if (fs_fd >= 0)
2668 infy_add (EV_A_ w);
2669 else
2670#endif
2671 ev_timer_start (EV_A_ &w->timer);
2672
2673 ev_start (EV_A_ (W)w, 1);
2674
2675 EV_FREQUENT_CHECK;
2676}
2677
2678void
2679ev_stat_stop (EV_P_ ev_stat *w)
2680{
2681 clear_pending (EV_A_ (W)w);
2682 if (expect_false (!ev_is_active (w)))
2683 return;
2684
2685 EV_FREQUENT_CHECK;
2686
2687#if EV_USE_INOTIFY
2688 infy_del (EV_A_ w);
2689#endif
2690 ev_timer_stop (EV_A_ &w->timer);
2691
2692 ev_stop (EV_A_ (W)w);
2693
2694 EV_FREQUENT_CHECK;
2695}
2696#endif
2697
2698#if EV_IDLE_ENABLE
2699void
2700ev_idle_start (EV_P_ ev_idle *w)
2701{
2702 if (expect_false (ev_is_active (w)))
2703 return;
2704
2705 pri_adjust (EV_A_ (W)w);
2706
2707 EV_FREQUENT_CHECK;
2708
2709 {
2710 int active = ++idlecnt [ABSPRI (w)];
2711
2712 ++idleall;
2713 ev_start (EV_A_ (W)w, active);
2714
2715 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2716 idles [ABSPRI (w)][active - 1] = w;
2717 }
2718
2719 EV_FREQUENT_CHECK;
2720}
2721
2722void
2723ev_idle_stop (EV_P_ ev_idle *w)
2724{
2725 clear_pending (EV_A_ (W)w);
2726 if (expect_false (!ev_is_active (w)))
2727 return;
2728
2729 EV_FREQUENT_CHECK;
2730
2731 {
2732 int active = ev_active (w);
2733
2734 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2735 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2736
2737 ev_stop (EV_A_ (W)w);
2738 --idleall;
2739 }
2740
2741 EV_FREQUENT_CHECK;
2742}
2743#endif
2744
2745void
2746ev_prepare_start (EV_P_ ev_prepare *w)
2747{
2748 if (expect_false (ev_is_active (w)))
2749 return;
2750
2751 EV_FREQUENT_CHECK;
2752
2753 ev_start (EV_A_ (W)w, ++preparecnt);
2754 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2755 prepares [preparecnt - 1] = w;
2756
2757 EV_FREQUENT_CHECK;
2758}
2759
2760void
2761ev_prepare_stop (EV_P_ ev_prepare *w)
2762{
2763 clear_pending (EV_A_ (W)w);
2764 if (expect_false (!ev_is_active (w)))
2765 return;
2766
2767 EV_FREQUENT_CHECK;
2768
2769 {
2770 int active = ev_active (w);
2771
2772 prepares [active - 1] = prepares [--preparecnt];
2773 ev_active (prepares [active - 1]) = active;
2774 }
2775
2776 ev_stop (EV_A_ (W)w);
2777
2778 EV_FREQUENT_CHECK;
2779}
2780
2781void
2782ev_check_start (EV_P_ ev_check *w)
2783{
2784 if (expect_false (ev_is_active (w)))
2785 return;
2786
2787 EV_FREQUENT_CHECK;
2788
2789 ev_start (EV_A_ (W)w, ++checkcnt);
2790 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2791 checks [checkcnt - 1] = w;
2792
2793 EV_FREQUENT_CHECK;
2794}
2795
2796void
2797ev_check_stop (EV_P_ ev_check *w)
2798{
2799 clear_pending (EV_A_ (W)w);
2800 if (expect_false (!ev_is_active (w)))
2801 return;
2802
2803 EV_FREQUENT_CHECK;
2804
2805 {
2806 int active = ev_active (w);
2807
2808 checks [active - 1] = checks [--checkcnt];
2809 ev_active (checks [active - 1]) = active;
2810 }
2811
2812 ev_stop (EV_A_ (W)w);
2813
2814 EV_FREQUENT_CHECK;
2815}
2816
2817#if EV_EMBED_ENABLE
2818void noinline
2819ev_embed_sweep (EV_P_ ev_embed *w)
2820{
2821 ev_loop (w->other, EVLOOP_NONBLOCK);
2822}
2823
2824static void
2825embed_io_cb (EV_P_ ev_io *io, int revents)
2826{
2827 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2828
2829 if (ev_cb (w))
2830 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2831 else
2832 ev_loop (w->other, EVLOOP_NONBLOCK);
2833}
2834
2835static void
2836embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2837{
2838 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2839
2840 {
2841 struct ev_loop *loop = w->other;
2842
2843 while (fdchangecnt)
2844 {
2845 fd_reify (EV_A);
2846 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2847 }
2848 }
2849}
2850
2851static void
2852embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2853{
2854 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2855
2856 {
2857 struct ev_loop *loop = w->other;
2858
2859 ev_loop_fork (EV_A);
2860 }
2861}
2862
2863#if 0
2864static void
2865embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2866{
2867 ev_idle_stop (EV_A_ idle);
2868}
2869#endif
2870
2871void
2872ev_embed_start (EV_P_ ev_embed *w)
2873{
2874 if (expect_false (ev_is_active (w)))
2875 return;
2876
2877 {
2878 struct ev_loop *loop = w->other;
2879 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2880 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2881 }
2882
2883 EV_FREQUENT_CHECK;
2884
2885 ev_set_priority (&w->io, ev_priority (w));
2886 ev_io_start (EV_A_ &w->io);
2887
2888 ev_prepare_init (&w->prepare, embed_prepare_cb);
2889 ev_set_priority (&w->prepare, EV_MINPRI);
2890 ev_prepare_start (EV_A_ &w->prepare);
2891
2892 ev_fork_init (&w->fork, embed_fork_cb);
2893 ev_fork_start (EV_A_ &w->fork);
2894
2895 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2896
2897 ev_start (EV_A_ (W)w, 1);
2898
2899 EV_FREQUENT_CHECK;
2900}
2901
2902void
2903ev_embed_stop (EV_P_ ev_embed *w)
2904{
2905 clear_pending (EV_A_ (W)w);
2906 if (expect_false (!ev_is_active (w)))
2907 return;
2908
2909 EV_FREQUENT_CHECK;
2910
2911 ev_io_stop (EV_A_ &w->io);
2912 ev_prepare_stop (EV_A_ &w->prepare);
2913 ev_fork_stop (EV_A_ &w->fork);
2914
2915 EV_FREQUENT_CHECK;
2916}
2917#endif
2918
2919#if EV_FORK_ENABLE
2920void
2921ev_fork_start (EV_P_ ev_fork *w)
2922{
2923 if (expect_false (ev_is_active (w)))
2924 return;
2925
2926 EV_FREQUENT_CHECK;
2927
2928 ev_start (EV_A_ (W)w, ++forkcnt);
2929 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2930 forks [forkcnt - 1] = w;
2931
2932 EV_FREQUENT_CHECK;
2933}
2934
2935void
2936ev_fork_stop (EV_P_ ev_fork *w)
2937{
2938 clear_pending (EV_A_ (W)w);
2939 if (expect_false (!ev_is_active (w)))
2940 return;
2941
2942 EV_FREQUENT_CHECK;
2943
2944 {
2945 int active = ev_active (w);
2946
2947 forks [active - 1] = forks [--forkcnt];
2948 ev_active (forks [active - 1]) = active;
2949 }
2950
2951 ev_stop (EV_A_ (W)w);
2952
2953 EV_FREQUENT_CHECK;
2954}
2955#endif
2956
2957#if EV_ASYNC_ENABLE
2958void
2959ev_async_start (EV_P_ ev_async *w)
2960{
2961 if (expect_false (ev_is_active (w)))
2962 return;
2963
2964 evpipe_init (EV_A);
2965
2966 EV_FREQUENT_CHECK;
2967
2968 ev_start (EV_A_ (W)w, ++asynccnt);
2969 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2970 asyncs [asynccnt - 1] = w;
2971
2972 EV_FREQUENT_CHECK;
2973}
2974
2975void
2976ev_async_stop (EV_P_ ev_async *w)
2977{
2978 clear_pending (EV_A_ (W)w);
2979 if (expect_false (!ev_is_active (w)))
2980 return;
2981
2982 EV_FREQUENT_CHECK;
2983
2984 {
2985 int active = ev_active (w);
2986
2987 asyncs [active - 1] = asyncs [--asynccnt];
2988 ev_active (asyncs [active - 1]) = active;
2989 }
2990
2991 ev_stop (EV_A_ (W)w);
2992
2993 EV_FREQUENT_CHECK;
2994}
2995
2996void
2997ev_async_send (EV_P_ ev_async *w)
2998{
2999 w->sent = 1;
3000 evpipe_write (EV_A_ &gotasync);
3001}
3002#endif
1565 3003
1566/*****************************************************************************/ 3004/*****************************************************************************/
1567 3005
1568struct ev_once 3006struct ev_once
1569{ 3007{
1570 struct ev_io io; 3008 ev_io io;
1571 struct ev_timer to; 3009 ev_timer to;
1572 void (*cb)(int revents, void *arg); 3010 void (*cb)(int revents, void *arg);
1573 void *arg; 3011 void *arg;
1574}; 3012};
1575 3013
1576static void 3014static void
1577once_cb (EV_P_ struct ev_once *once, int revents) 3015once_cb (EV_P_ struct ev_once *once, int revents)
1578{ 3016{
1579 void (*cb)(int revents, void *arg) = once->cb; 3017 void (*cb)(int revents, void *arg) = once->cb;
1580 void *arg = once->arg; 3018 void *arg = once->arg;
1581 3019
1582 ev_io_stop (EV_A_ &once->io); 3020 ev_io_stop (EV_A_ &once->io);
1583 ev_timer_stop (EV_A_ &once->to); 3021 ev_timer_stop (EV_A_ &once->to);
1584 ev_free (once); 3022 ev_free (once);
1585 3023
1586 cb (revents, arg); 3024 cb (revents, arg);
1587} 3025}
1588 3026
1589static void 3027static void
1590once_cb_io (EV_P_ struct ev_io *w, int revents) 3028once_cb_io (EV_P_ ev_io *w, int revents)
1591{ 3029{
1592 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3030 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3031
3032 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1593} 3033}
1594 3034
1595static void 3035static void
1596once_cb_to (EV_P_ struct ev_timer *w, int revents) 3036once_cb_to (EV_P_ ev_timer *w, int revents)
1597{ 3037{
1598 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3038 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3039
3040 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1599} 3041}
1600 3042
1601void 3043void
1602ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3044ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1603{ 3045{
1604 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3046 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1605 3047
1606 if (!once) 3048 if (expect_false (!once))
3049 {
1607 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3050 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1608 else 3051 return;
1609 { 3052 }
3053
1610 once->cb = cb; 3054 once->cb = cb;
1611 once->arg = arg; 3055 once->arg = arg;
1612 3056
1613 ev_init (&once->io, once_cb_io); 3057 ev_init (&once->io, once_cb_io);
1614 if (fd >= 0) 3058 if (fd >= 0)
1615 { 3059 {
1616 ev_io_set (&once->io, fd, events); 3060 ev_io_set (&once->io, fd, events);
1617 ev_io_start (EV_A_ &once->io); 3061 ev_io_start (EV_A_ &once->io);
1618 } 3062 }
1619 3063
1620 ev_init (&once->to, once_cb_to); 3064 ev_init (&once->to, once_cb_to);
1621 if (timeout >= 0.) 3065 if (timeout >= 0.)
1622 { 3066 {
1623 ev_timer_set (&once->to, timeout, 0.); 3067 ev_timer_set (&once->to, timeout, 0.);
1624 ev_timer_start (EV_A_ &once->to); 3068 ev_timer_start (EV_A_ &once->to);
1625 }
1626 } 3069 }
1627} 3070}
3071
3072#if EV_MULTIPLICITY
3073 #include "ev_wrap.h"
3074#endif
1628 3075
1629#ifdef __cplusplus 3076#ifdef __cplusplus
1630} 3077}
1631#endif 3078#endif
1632 3079

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