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Comparing libev/ev.c (file contents):
Revision 1.87 by root, Sat Nov 10 03:36:15 2007 UTC vs.
Revision 1.278 by root, Tue Jan 6 19:46:56 2009 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) 2007,2008,2009 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
51
52# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 0
57# endif
58# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1
60# endif
61# endif
62# endif
38 63
39# if HAVE_CLOCK_GETTIME 64# if HAVE_CLOCK_GETTIME
65# ifndef EV_USE_MONOTONIC
40# define EV_USE_MONOTONIC 1 66# define EV_USE_MONOTONIC 1
67# endif
68# ifndef EV_USE_REALTIME
41# define EV_USE_REALTIME 1 69# define EV_USE_REALTIME 1
70# endif
71# else
72# ifndef EV_USE_MONOTONIC
73# define EV_USE_MONOTONIC 0
74# endif
75# ifndef EV_USE_REALTIME
76# define EV_USE_REALTIME 0
77# endif
42# endif 78# endif
43 79
44# if HAVE_SELECT && HAVE_SYS_SELECT_H 80# ifndef EV_USE_NANOSLEEP
81# if HAVE_NANOSLEEP
45# define EV_USE_SELECT 1 82# define EV_USE_NANOSLEEP 1
83# else
84# define EV_USE_NANOSLEEP 0
85# endif
46# endif 86# endif
47 87
48# if HAVE_POLL && HAVE_POLL_H 88# ifndef EV_USE_SELECT
89# if HAVE_SELECT && HAVE_SYS_SELECT_H
49# define EV_USE_POLL 1 90# define EV_USE_SELECT 1
91# else
92# define EV_USE_SELECT 0
93# endif
50# endif 94# endif
51 95
52# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 96# ifndef EV_USE_POLL
97# if HAVE_POLL && HAVE_POLL_H
53# define EV_USE_EPOLL 1 98# define EV_USE_POLL 1
99# else
100# define EV_USE_POLL 0
101# endif
54# endif 102# endif
55 103
56# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 104# ifndef EV_USE_EPOLL
105# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
57# define EV_USE_KQUEUE 1 106# define EV_USE_EPOLL 1
107# else
108# define EV_USE_EPOLL 0
109# endif
58# endif 110# endif
111
112# ifndef EV_USE_KQUEUE
113# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
114# define EV_USE_KQUEUE 1
115# else
116# define EV_USE_KQUEUE 0
117# endif
118# endif
119
120# ifndef EV_USE_PORT
121# if HAVE_PORT_H && HAVE_PORT_CREATE
122# define EV_USE_PORT 1
123# else
124# define EV_USE_PORT 0
125# endif
126# endif
59 127
128# ifndef EV_USE_INOTIFY
129# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
130# define EV_USE_INOTIFY 1
131# else
132# define EV_USE_INOTIFY 0
133# endif
134# endif
135
136# ifndef EV_USE_EVENTFD
137# if HAVE_EVENTFD
138# define EV_USE_EVENTFD 1
139# else
140# define EV_USE_EVENTFD 0
141# endif
142# endif
143
60#endif 144#endif
61 145
62#include <math.h> 146#include <math.h>
63#include <stdlib.h> 147#include <stdlib.h>
64#include <fcntl.h> 148#include <fcntl.h>
… …
71#include <sys/types.h> 155#include <sys/types.h>
72#include <time.h> 156#include <time.h>
73 157
74#include <signal.h> 158#include <signal.h>
75 159
76#ifndef WIN32
77# include <unistd.h>
78# include <sys/time.h>
79# include <sys/wait.h>
80#endif
81/**/
82
83#ifndef EV_USE_MONOTONIC
84# define EV_USE_MONOTONIC 1
85#endif
86
87#ifndef EV_USE_SELECT
88# define EV_USE_SELECT 1
89#endif
90
91#ifndef EV_USE_POLL
92# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
93#endif
94
95#ifndef EV_USE_EPOLL
96# define EV_USE_EPOLL 0
97#endif
98
99#ifndef EV_USE_KQUEUE
100# define EV_USE_KQUEUE 0
101#endif
102
103#ifndef EV_USE_WIN32
104# ifdef WIN32
105# define EV_USE_WIN32 0 /* it does not exist, use select */
106# undef EV_USE_SELECT
107# define EV_USE_SELECT 1
108# else
109# define EV_USE_WIN32 0
110# endif
111#endif
112
113#ifndef EV_USE_REALTIME
114# define EV_USE_REALTIME 1
115#endif
116
117/**/
118
119#ifndef CLOCK_MONOTONIC
120# undef EV_USE_MONOTONIC
121# define EV_USE_MONOTONIC 0
122#endif
123
124#ifndef CLOCK_REALTIME
125# undef EV_USE_REALTIME
126# define EV_USE_REALTIME 0
127#endif
128
129/**/
130
131#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
132#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
133#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
134/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
135
136#ifdef EV_H 160#ifdef EV_H
137# include EV_H 161# include EV_H
138#else 162#else
139# include "ev.h" 163# include "ev.h"
140#endif 164#endif
141 165
166#ifndef _WIN32
167# include <sys/time.h>
168# include <sys/wait.h>
169# include <unistd.h>
170#else
171# include <io.h>
172# define WIN32_LEAN_AND_MEAN
173# include <windows.h>
174# ifndef EV_SELECT_IS_WINSOCKET
175# define EV_SELECT_IS_WINSOCKET 1
176# endif
177#endif
178
179/* this block tries to deduce configuration from header-defined symbols and defaults */
180
181#ifndef EV_USE_CLOCK_SYSCALL
182# if __linux && __GLIBC__ >= 2
183# define EV_USE_CLOCK_SYSCALL 1
184# else
185# define EV_USE_CLOCK_SYSCALL 0
186# endif
187#endif
188
189#ifndef EV_USE_MONOTONIC
190# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
191# define EV_USE_MONOTONIC 1
192# else
193# define EV_USE_MONOTONIC 0
194# endif
195#endif
196
197#ifndef EV_USE_REALTIME
198# define EV_USE_REALTIME 0
199#endif
200
201#ifndef EV_USE_NANOSLEEP
202# if _POSIX_C_SOURCE >= 199309L
203# define EV_USE_NANOSLEEP 1
204# else
205# define EV_USE_NANOSLEEP 0
206# endif
207#endif
208
209#ifndef EV_USE_SELECT
210# define EV_USE_SELECT 1
211#endif
212
213#ifndef EV_USE_POLL
214# ifdef _WIN32
215# define EV_USE_POLL 0
216# else
217# define EV_USE_POLL 1
218# endif
219#endif
220
221#ifndef EV_USE_EPOLL
222# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
223# define EV_USE_EPOLL 1
224# else
225# define EV_USE_EPOLL 0
226# endif
227#endif
228
229#ifndef EV_USE_KQUEUE
230# define EV_USE_KQUEUE 0
231#endif
232
233#ifndef EV_USE_PORT
234# define EV_USE_PORT 0
235#endif
236
237#ifndef EV_USE_INOTIFY
238# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
239# define EV_USE_INOTIFY 1
240# else
241# define EV_USE_INOTIFY 0
242# endif
243#endif
244
245#ifndef EV_PID_HASHSIZE
246# if EV_MINIMAL
247# define EV_PID_HASHSIZE 1
248# else
249# define EV_PID_HASHSIZE 16
250# endif
251#endif
252
253#ifndef EV_INOTIFY_HASHSIZE
254# if EV_MINIMAL
255# define EV_INOTIFY_HASHSIZE 1
256# else
257# define EV_INOTIFY_HASHSIZE 16
258# endif
259#endif
260
261#ifndef EV_USE_EVENTFD
262# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
263# define EV_USE_EVENTFD 1
264# else
265# define EV_USE_EVENTFD 0
266# endif
267#endif
268
269#if 0 /* debugging */
270# define EV_VERIFY 3
271# define EV_USE_4HEAP 1
272# define EV_HEAP_CACHE_AT 1
273#endif
274
275#ifndef EV_VERIFY
276# define EV_VERIFY !EV_MINIMAL
277#endif
278
279#ifndef EV_USE_4HEAP
280# define EV_USE_4HEAP !EV_MINIMAL
281#endif
282
283#ifndef EV_HEAP_CACHE_AT
284# define EV_HEAP_CACHE_AT !EV_MINIMAL
285#endif
286
287/* this block fixes any misconfiguration where we know we run into trouble otherwise */
288
289#ifndef CLOCK_MONOTONIC
290# undef EV_USE_MONOTONIC
291# define EV_USE_MONOTONIC 0
292#endif
293
294#ifndef CLOCK_REALTIME
295# undef EV_USE_REALTIME
296# define EV_USE_REALTIME 0
297#endif
298
299#if !EV_STAT_ENABLE
300# undef EV_USE_INOTIFY
301# define EV_USE_INOTIFY 0
302#endif
303
304#if !EV_USE_NANOSLEEP
305# ifndef _WIN32
306# include <sys/select.h>
307# endif
308#endif
309
310#if EV_USE_INOTIFY
311# include <sys/utsname.h>
312# include <sys/statfs.h>
313# include <sys/inotify.h>
314/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
315# ifndef IN_DONT_FOLLOW
316# undef EV_USE_INOTIFY
317# define EV_USE_INOTIFY 0
318# endif
319#endif
320
321#if EV_SELECT_IS_WINSOCKET
322# include <winsock.h>
323#endif
324
325/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
326/* which makes programs even slower. might work on other unices, too. */
327#if EV_USE_CLOCK_SYSCALL
328# include <syscall.h>
329# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
330# undef EV_USE_MONOTONIC
331# define EV_USE_MONOTONIC 1
332#endif
333
334#if EV_USE_EVENTFD
335/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
336# include <stdint.h>
337# ifdef __cplusplus
338extern "C" {
339# endif
340int eventfd (unsigned int initval, int flags);
341# ifdef __cplusplus
342}
343# endif
344#endif
345
346/**/
347
348#if EV_VERIFY >= 3
349# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
350#else
351# define EV_FREQUENT_CHECK do { } while (0)
352#endif
353
354/*
355 * This is used to avoid floating point rounding problems.
356 * It is added to ev_rt_now when scheduling periodics
357 * to ensure progress, time-wise, even when rounding
358 * errors are against us.
359 * This value is good at least till the year 4000.
360 * Better solutions welcome.
361 */
362#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
363
364#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
365#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
366/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
367
142#if __GNUC__ >= 3 368#if __GNUC__ >= 4
143# define expect(expr,value) __builtin_expect ((expr),(value)) 369# define expect(expr,value) __builtin_expect ((expr),(value))
144# define inline inline 370# define noinline __attribute__ ((noinline))
145#else 371#else
146# define expect(expr,value) (expr) 372# define expect(expr,value) (expr)
147# define inline static 373# define noinline
374# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
375# define inline
376# endif
148#endif 377#endif
149 378
150#define expect_false(expr) expect ((expr) != 0, 0) 379#define expect_false(expr) expect ((expr) != 0, 0)
151#define expect_true(expr) expect ((expr) != 0, 1) 380#define expect_true(expr) expect ((expr) != 0, 1)
381#define inline_size static inline
382
383#if EV_MINIMAL
384# define inline_speed static noinline
385#else
386# define inline_speed static inline
387#endif
152 388
153#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 389#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
154#define ABSPRI(w) ((w)->priority - EV_MINPRI) 390#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
155 391
392#define EMPTY /* required for microsofts broken pseudo-c compiler */
393#define EMPTY2(a,b) /* used to suppress some warnings */
394
156typedef struct ev_watcher *W; 395typedef ev_watcher *W;
157typedef struct ev_watcher_list *WL; 396typedef ev_watcher_list *WL;
158typedef struct ev_watcher_time *WT; 397typedef ev_watcher_time *WT;
159 398
399#define ev_active(w) ((W)(w))->active
400#define ev_at(w) ((WT)(w))->at
401
402#if EV_USE_MONOTONIC
403/* sig_atomic_t is used to avoid per-thread variables or locking but still */
404/* giving it a reasonably high chance of working on typical architetcures */
160static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 405static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
406#endif
161 407
408#ifdef _WIN32
162#include "ev_win32.c" 409# include "ev_win32.c"
410#endif
163 411
164/*****************************************************************************/ 412/*****************************************************************************/
165 413
166static void (*syserr_cb)(const char *msg); 414static void (*syserr_cb)(const char *msg);
167 415
416void
168void ev_set_syserr_cb (void (*cb)(const char *msg)) 417ev_set_syserr_cb (void (*cb)(const char *msg))
169{ 418{
170 syserr_cb = cb; 419 syserr_cb = cb;
171} 420}
172 421
173static void 422static void noinline
174syserr (const char *msg) 423ev_syserr (const char *msg)
175{ 424{
176 if (!msg) 425 if (!msg)
177 msg = "(libev) system error"; 426 msg = "(libev) system error";
178 427
179 if (syserr_cb) 428 if (syserr_cb)
… …
183 perror (msg); 432 perror (msg);
184 abort (); 433 abort ();
185 } 434 }
186} 435}
187 436
437static void *
438ev_realloc_emul (void *ptr, long size)
439{
440 /* some systems, notably openbsd and darwin, fail to properly
441 * implement realloc (x, 0) (as required by both ansi c-98 and
442 * the single unix specification, so work around them here.
443 */
444
445 if (size)
446 return realloc (ptr, size);
447
448 free (ptr);
449 return 0;
450}
451
188static void *(*alloc)(void *ptr, long size); 452static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
189 453
454void
190void ev_set_allocator (void *(*cb)(void *ptr, long size)) 455ev_set_allocator (void *(*cb)(void *ptr, long size))
191{ 456{
192 alloc = cb; 457 alloc = cb;
193} 458}
194 459
195static void * 460inline_speed void *
196ev_realloc (void *ptr, long size) 461ev_realloc (void *ptr, long size)
197{ 462{
198 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 463 ptr = alloc (ptr, size);
199 464
200 if (!ptr && size) 465 if (!ptr && size)
201 { 466 {
202 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 467 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
203 abort (); 468 abort ();
… …
214typedef struct 479typedef struct
215{ 480{
216 WL head; 481 WL head;
217 unsigned char events; 482 unsigned char events;
218 unsigned char reify; 483 unsigned char reify;
484 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
485 unsigned char unused;
486#if EV_USE_EPOLL
487 unsigned int egen; /* generation counter to counter epoll bugs */
488#endif
489#if EV_SELECT_IS_WINSOCKET
490 SOCKET handle;
491#endif
219} ANFD; 492} ANFD;
220 493
221typedef struct 494typedef struct
222{ 495{
223 W w; 496 W w;
224 int events; 497 int events;
225} ANPENDING; 498} ANPENDING;
226 499
500#if EV_USE_INOTIFY
501/* hash table entry per inotify-id */
502typedef struct
503{
504 WL head;
505} ANFS;
506#endif
507
508/* Heap Entry */
509#if EV_HEAP_CACHE_AT
510 typedef struct {
511 ev_tstamp at;
512 WT w;
513 } ANHE;
514
515 #define ANHE_w(he) (he).w /* access watcher, read-write */
516 #define ANHE_at(he) (he).at /* access cached at, read-only */
517 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
518#else
519 typedef WT ANHE;
520
521 #define ANHE_w(he) (he)
522 #define ANHE_at(he) (he)->at
523 #define ANHE_at_cache(he)
524#endif
525
227#if EV_MULTIPLICITY 526#if EV_MULTIPLICITY
228 527
229 struct ev_loop 528 struct ev_loop
230 { 529 {
231 ev_tstamp ev_rt_now; 530 ev_tstamp ev_rt_now;
531 #define ev_rt_now ((loop)->ev_rt_now)
232 #define VAR(name,decl) decl; 532 #define VAR(name,decl) decl;
233 #include "ev_vars.h" 533 #include "ev_vars.h"
234 #undef VAR 534 #undef VAR
235 }; 535 };
236 #include "ev_wrap.h" 536 #include "ev_wrap.h"
237 537
238 struct ev_loop default_loop_struct; 538 static struct ev_loop default_loop_struct;
239 static struct ev_loop *default_loop; 539 struct ev_loop *ev_default_loop_ptr;
240 540
241#else 541#else
242 542
243 ev_tstamp ev_rt_now; 543 ev_tstamp ev_rt_now;
244 #define VAR(name,decl) static decl; 544 #define VAR(name,decl) static decl;
245 #include "ev_vars.h" 545 #include "ev_vars.h"
246 #undef VAR 546 #undef VAR
247 547
248 static int default_loop; 548 static int ev_default_loop_ptr;
249 549
250#endif 550#endif
251 551
252/*****************************************************************************/ 552/*****************************************************************************/
253 553
254inline ev_tstamp 554ev_tstamp
255ev_time (void) 555ev_time (void)
256{ 556{
257#if EV_USE_REALTIME 557#if EV_USE_REALTIME
258 struct timespec ts; 558 struct timespec ts;
259 clock_gettime (CLOCK_REALTIME, &ts); 559 clock_gettime (CLOCK_REALTIME, &ts);
… …
263 gettimeofday (&tv, 0); 563 gettimeofday (&tv, 0);
264 return tv.tv_sec + tv.tv_usec * 1e-6; 564 return tv.tv_sec + tv.tv_usec * 1e-6;
265#endif 565#endif
266} 566}
267 567
268inline ev_tstamp 568ev_tstamp inline_size
269get_clock (void) 569get_clock (void)
270{ 570{
271#if EV_USE_MONOTONIC 571#if EV_USE_MONOTONIC
272 if (expect_true (have_monotonic)) 572 if (expect_true (have_monotonic))
273 { 573 {
… …
286{ 586{
287 return ev_rt_now; 587 return ev_rt_now;
288} 588}
289#endif 589#endif
290 590
291#define array_roundsize(type,n) ((n) | 4 & ~3) 591void
592ev_sleep (ev_tstamp delay)
593{
594 if (delay > 0.)
595 {
596#if EV_USE_NANOSLEEP
597 struct timespec ts;
598
599 ts.tv_sec = (time_t)delay;
600 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
601
602 nanosleep (&ts, 0);
603#elif defined(_WIN32)
604 Sleep ((unsigned long)(delay * 1e3));
605#else
606 struct timeval tv;
607
608 tv.tv_sec = (time_t)delay;
609 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
610
611 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
612 /* somehting nto guaranteed by newer posix versions, but guaranteed */
613 /* by older ones */
614 select (0, 0, 0, 0, &tv);
615#endif
616 }
617}
618
619/*****************************************************************************/
620
621#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
622
623int inline_size
624array_nextsize (int elem, int cur, int cnt)
625{
626 int ncur = cur + 1;
627
628 do
629 ncur <<= 1;
630 while (cnt > ncur);
631
632 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
633 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
634 {
635 ncur *= elem;
636 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
637 ncur = ncur - sizeof (void *) * 4;
638 ncur /= elem;
639 }
640
641 return ncur;
642}
643
644static noinline void *
645array_realloc (int elem, void *base, int *cur, int cnt)
646{
647 *cur = array_nextsize (elem, *cur, cnt);
648 return ev_realloc (base, elem * *cur);
649}
650
651#define array_init_zero(base,count) \
652 memset ((void *)(base), 0, sizeof (*(base)) * (count))
292 653
293#define array_needsize(type,base,cur,cnt,init) \ 654#define array_needsize(type,base,cur,cnt,init) \
294 if (expect_false ((cnt) > cur)) \ 655 if (expect_false ((cnt) > (cur))) \
295 { \ 656 { \
296 int newcnt = cur; \ 657 int ocur_ = (cur); \
297 do \ 658 (base) = (type *)array_realloc \
298 { \ 659 (sizeof (type), (base), &(cur), (cnt)); \
299 newcnt = array_roundsize (type, newcnt << 1); \ 660 init ((base) + (ocur_), (cur) - ocur_); \
300 } \
301 while ((cnt) > newcnt); \
302 \
303 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
304 init (base + cur, newcnt - cur); \
305 cur = newcnt; \
306 } 661 }
307 662
663#if 0
308#define array_slim(type,stem) \ 664#define array_slim(type,stem) \
309 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 665 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
310 { \ 666 { \
311 stem ## max = array_roundsize (stem ## cnt >> 1); \ 667 stem ## max = array_roundsize (stem ## cnt >> 1); \
312 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 668 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
313 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 669 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
314 } 670 }
315 671#endif
316/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
317/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
318#define array_free_microshit(stem) \
319 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
320 672
321#define array_free(stem, idx) \ 673#define array_free(stem, idx) \
322 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 674 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
323 675
324/*****************************************************************************/ 676/*****************************************************************************/
325 677
326static void 678void noinline
327anfds_init (ANFD *base, int count)
328{
329 while (count--)
330 {
331 base->head = 0;
332 base->events = EV_NONE;
333 base->reify = 0;
334
335 ++base;
336 }
337}
338
339void
340ev_feed_event (EV_P_ void *w, int revents) 679ev_feed_event (EV_P_ void *w, int revents)
341{ 680{
342 W w_ = (W)w; 681 W w_ = (W)w;
682 int pri = ABSPRI (w_);
343 683
344 if (w_->pending) 684 if (expect_false (w_->pending))
685 pendings [pri][w_->pending - 1].events |= revents;
686 else
345 { 687 {
688 w_->pending = ++pendingcnt [pri];
689 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
690 pendings [pri][w_->pending - 1].w = w_;
346 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 691 pendings [pri][w_->pending - 1].events = revents;
347 return;
348 } 692 }
349
350 w_->pending = ++pendingcnt [ABSPRI (w_)];
351 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
352 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
353 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
354} 693}
355 694
356static void 695void inline_speed
357queue_events (EV_P_ W *events, int eventcnt, int type) 696queue_events (EV_P_ W *events, int eventcnt, int type)
358{ 697{
359 int i; 698 int i;
360 699
361 for (i = 0; i < eventcnt; ++i) 700 for (i = 0; i < eventcnt; ++i)
362 ev_feed_event (EV_A_ events [i], type); 701 ev_feed_event (EV_A_ events [i], type);
363} 702}
364 703
365inline void 704/*****************************************************************************/
705
706void inline_speed
366fd_event (EV_P_ int fd, int revents) 707fd_event (EV_P_ int fd, int revents)
367{ 708{
368 ANFD *anfd = anfds + fd; 709 ANFD *anfd = anfds + fd;
369 struct ev_io *w; 710 ev_io *w;
370 711
371 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 712 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
372 { 713 {
373 int ev = w->events & revents; 714 int ev = w->events & revents;
374 715
375 if (ev) 716 if (ev)
376 ev_feed_event (EV_A_ (W)w, ev); 717 ev_feed_event (EV_A_ (W)w, ev);
… …
378} 719}
379 720
380void 721void
381ev_feed_fd_event (EV_P_ int fd, int revents) 722ev_feed_fd_event (EV_P_ int fd, int revents)
382{ 723{
724 if (fd >= 0 && fd < anfdmax)
383 fd_event (EV_A_ fd, revents); 725 fd_event (EV_A_ fd, revents);
384} 726}
385 727
386/*****************************************************************************/ 728void inline_size
387
388static void
389fd_reify (EV_P) 729fd_reify (EV_P)
390{ 730{
391 int i; 731 int i;
392 732
393 for (i = 0; i < fdchangecnt; ++i) 733 for (i = 0; i < fdchangecnt; ++i)
394 { 734 {
395 int fd = fdchanges [i]; 735 int fd = fdchanges [i];
396 ANFD *anfd = anfds + fd; 736 ANFD *anfd = anfds + fd;
397 struct ev_io *w; 737 ev_io *w;
398 738
399 int events = 0; 739 unsigned char events = 0;
400 740
401 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 741 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
402 events |= w->events; 742 events |= (unsigned char)w->events;
403 743
744#if EV_SELECT_IS_WINSOCKET
745 if (events)
746 {
747 unsigned long arg;
748 #ifdef EV_FD_TO_WIN32_HANDLE
749 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
750 #else
751 anfd->handle = _get_osfhandle (fd);
752 #endif
753 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
754 }
755#endif
756
757 {
758 unsigned char o_events = anfd->events;
759 unsigned char o_reify = anfd->reify;
760
404 anfd->reify = 0; 761 anfd->reify = 0;
405
406 method_modify (EV_A_ fd, anfd->events, events);
407 anfd->events = events; 762 anfd->events = events;
763
764 if (o_events != events || o_reify & EV_IOFDSET)
765 backend_modify (EV_A_ fd, o_events, events);
766 }
408 } 767 }
409 768
410 fdchangecnt = 0; 769 fdchangecnt = 0;
411} 770}
412 771
413static void 772void inline_size
414fd_change (EV_P_ int fd) 773fd_change (EV_P_ int fd, int flags)
415{ 774{
416 if (anfds [fd].reify) 775 unsigned char reify = anfds [fd].reify;
417 return;
418
419 anfds [fd].reify = 1; 776 anfds [fd].reify |= flags;
420 777
778 if (expect_true (!reify))
779 {
421 ++fdchangecnt; 780 ++fdchangecnt;
422 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); 781 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
423 fdchanges [fdchangecnt - 1] = fd; 782 fdchanges [fdchangecnt - 1] = fd;
783 }
424} 784}
425 785
426static void 786void inline_speed
427fd_kill (EV_P_ int fd) 787fd_kill (EV_P_ int fd)
428{ 788{
429 struct ev_io *w; 789 ev_io *w;
430 790
431 while ((w = (struct ev_io *)anfds [fd].head)) 791 while ((w = (ev_io *)anfds [fd].head))
432 { 792 {
433 ev_io_stop (EV_A_ w); 793 ev_io_stop (EV_A_ w);
434 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 794 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
435 } 795 }
436} 796}
437 797
438static int 798int inline_size
439fd_valid (int fd) 799fd_valid (int fd)
440{ 800{
441#ifdef WIN32 801#ifdef _WIN32
442 return !!win32_get_osfhandle (fd); 802 return _get_osfhandle (fd) != -1;
443#else 803#else
444 return fcntl (fd, F_GETFD) != -1; 804 return fcntl (fd, F_GETFD) != -1;
445#endif 805#endif
446} 806}
447 807
448/* called on EBADF to verify fds */ 808/* called on EBADF to verify fds */
449static void 809static void noinline
450fd_ebadf (EV_P) 810fd_ebadf (EV_P)
451{ 811{
452 int fd; 812 int fd;
453 813
454 for (fd = 0; fd < anfdmax; ++fd) 814 for (fd = 0; fd < anfdmax; ++fd)
455 if (anfds [fd].events) 815 if (anfds [fd].events)
456 if (!fd_valid (fd) == -1 && errno == EBADF) 816 if (!fd_valid (fd) && errno == EBADF)
457 fd_kill (EV_A_ fd); 817 fd_kill (EV_A_ fd);
458} 818}
459 819
460/* called on ENOMEM in select/poll to kill some fds and retry */ 820/* called on ENOMEM in select/poll to kill some fds and retry */
461static void 821static void noinline
462fd_enomem (EV_P) 822fd_enomem (EV_P)
463{ 823{
464 int fd; 824 int fd;
465 825
466 for (fd = anfdmax; fd--; ) 826 for (fd = anfdmax; fd--; )
… …
469 fd_kill (EV_A_ fd); 829 fd_kill (EV_A_ fd);
470 return; 830 return;
471 } 831 }
472} 832}
473 833
474/* usually called after fork if method needs to re-arm all fds from scratch */ 834/* usually called after fork if backend needs to re-arm all fds from scratch */
475static void 835static void noinline
476fd_rearm_all (EV_P) 836fd_rearm_all (EV_P)
477{ 837{
478 int fd; 838 int fd;
479 839
480 /* this should be highly optimised to not do anything but set a flag */
481 for (fd = 0; fd < anfdmax; ++fd) 840 for (fd = 0; fd < anfdmax; ++fd)
482 if (anfds [fd].events) 841 if (anfds [fd].events)
483 { 842 {
484 anfds [fd].events = 0; 843 anfds [fd].events = 0;
844 anfds [fd].emask = 0;
485 fd_change (EV_A_ fd); 845 fd_change (EV_A_ fd, EV_IOFDSET | 1);
486 } 846 }
487} 847}
488 848
489/*****************************************************************************/ 849/*****************************************************************************/
490 850
491static void 851/*
492upheap (WT *heap, int k) 852 * the heap functions want a real array index. array index 0 uis guaranteed to not
493{ 853 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
494 WT w = heap [k]; 854 * the branching factor of the d-tree.
855 */
495 856
496 while (k && heap [k >> 1]->at > w->at) 857/*
497 { 858 * at the moment we allow libev the luxury of two heaps,
498 heap [k] = heap [k >> 1]; 859 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
499 ((W)heap [k])->active = k + 1; 860 * which is more cache-efficient.
500 k >>= 1; 861 * the difference is about 5% with 50000+ watchers.
501 } 862 */
863#if EV_USE_4HEAP
502 864
503 heap [k] = w; 865#define DHEAP 4
504 ((W)heap [k])->active = k + 1; 866#define HEAP0 (DHEAP - 1) /* index of first element in heap */
867#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
868#define UPHEAP_DONE(p,k) ((p) == (k))
505 869
506} 870/* away from the root */
507 871void inline_speed
508static void
509downheap (WT *heap, int N, int k) 872downheap (ANHE *heap, int N, int k)
510{ 873{
511 WT w = heap [k]; 874 ANHE he = heap [k];
875 ANHE *E = heap + N + HEAP0;
512 876
513 while (k < (N >> 1)) 877 for (;;)
514 { 878 {
515 int j = k << 1; 879 ev_tstamp minat;
880 ANHE *minpos;
881 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
516 882
517 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 883 /* find minimum child */
884 if (expect_true (pos + DHEAP - 1 < E))
518 ++j; 885 {
519 886 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
520 if (w->at <= heap [j]->at) 887 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
888 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
889 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
890 }
891 else if (pos < E)
892 {
893 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
894 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
895 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
896 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
897 }
898 else
521 break; 899 break;
522 900
901 if (ANHE_at (he) <= minat)
902 break;
903
904 heap [k] = *minpos;
905 ev_active (ANHE_w (*minpos)) = k;
906
907 k = minpos - heap;
908 }
909
910 heap [k] = he;
911 ev_active (ANHE_w (he)) = k;
912}
913
914#else /* 4HEAP */
915
916#define HEAP0 1
917#define HPARENT(k) ((k) >> 1)
918#define UPHEAP_DONE(p,k) (!(p))
919
920/* away from the root */
921void inline_speed
922downheap (ANHE *heap, int N, int k)
923{
924 ANHE he = heap [k];
925
926 for (;;)
927 {
928 int c = k << 1;
929
930 if (c > N + HEAP0 - 1)
931 break;
932
933 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
934 ? 1 : 0;
935
936 if (ANHE_at (he) <= ANHE_at (heap [c]))
937 break;
938
523 heap [k] = heap [j]; 939 heap [k] = heap [c];
524 ((W)heap [k])->active = k + 1; 940 ev_active (ANHE_w (heap [k])) = k;
941
525 k = j; 942 k = c;
526 } 943 }
527 944
528 heap [k] = w; 945 heap [k] = he;
529 ((W)heap [k])->active = k + 1; 946 ev_active (ANHE_w (he)) = k;
530} 947}
948#endif
531 949
532inline void 950/* towards the root */
533adjustheap (WT *heap, int N, int k, ev_tstamp at) 951void inline_speed
952upheap (ANHE *heap, int k)
534{ 953{
535 ev_tstamp old_at = heap [k]->at; 954 ANHE he = heap [k];
955
956 for (;;)
957 {
958 int p = HPARENT (k);
959
960 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
961 break;
962
963 heap [k] = heap [p];
964 ev_active (ANHE_w (heap [k])) = k;
965 k = p;
966 }
967
536 heap [k]->at = at; 968 heap [k] = he;
969 ev_active (ANHE_w (he)) = k;
970}
537 971
538 if (old_at < at) 972void inline_size
973adjustheap (ANHE *heap, int N, int k)
974{
975 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
976 upheap (heap, k);
977 else
539 downheap (heap, N, k); 978 downheap (heap, N, k);
540 else 979}
980
981/* rebuild the heap: this function is used only once and executed rarely */
982void inline_size
983reheap (ANHE *heap, int N)
984{
985 int i;
986
987 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
988 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
989 for (i = 0; i < N; ++i)
541 upheap (heap, k); 990 upheap (heap, i + HEAP0);
542} 991}
543 992
544/*****************************************************************************/ 993/*****************************************************************************/
545 994
546typedef struct 995typedef struct
547{ 996{
548 WL head; 997 WL head;
549 sig_atomic_t volatile gotsig; 998 EV_ATOMIC_T gotsig;
550} ANSIG; 999} ANSIG;
551 1000
552static ANSIG *signals; 1001static ANSIG *signals;
553static int signalmax; 1002static int signalmax;
554 1003
555static int sigpipe [2]; 1004static EV_ATOMIC_T gotsig;
556static sig_atomic_t volatile gotsig; 1005
557static struct ev_io sigev; 1006/*****************************************************************************/
1007
1008void inline_speed
1009fd_intern (int fd)
1010{
1011#ifdef _WIN32
1012 unsigned long arg = 1;
1013 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1014#else
1015 fcntl (fd, F_SETFD, FD_CLOEXEC);
1016 fcntl (fd, F_SETFL, O_NONBLOCK);
1017#endif
1018}
1019
1020static void noinline
1021evpipe_init (EV_P)
1022{
1023 if (!ev_is_active (&pipeev))
1024 {
1025#if EV_USE_EVENTFD
1026 if ((evfd = eventfd (0, 0)) >= 0)
1027 {
1028 evpipe [0] = -1;
1029 fd_intern (evfd);
1030 ev_io_set (&pipeev, evfd, EV_READ);
1031 }
1032 else
1033#endif
1034 {
1035 while (pipe (evpipe))
1036 ev_syserr ("(libev) error creating signal/async pipe");
1037
1038 fd_intern (evpipe [0]);
1039 fd_intern (evpipe [1]);
1040 ev_io_set (&pipeev, evpipe [0], EV_READ);
1041 }
1042
1043 ev_io_start (EV_A_ &pipeev);
1044 ev_unref (EV_A); /* watcher should not keep loop alive */
1045 }
1046}
1047
1048void inline_size
1049evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1050{
1051 if (!*flag)
1052 {
1053 int old_errno = errno; /* save errno because write might clobber it */
1054
1055 *flag = 1;
1056
1057#if EV_USE_EVENTFD
1058 if (evfd >= 0)
1059 {
1060 uint64_t counter = 1;
1061 write (evfd, &counter, sizeof (uint64_t));
1062 }
1063 else
1064#endif
1065 write (evpipe [1], &old_errno, 1);
1066
1067 errno = old_errno;
1068 }
1069}
558 1070
559static void 1071static void
560signals_init (ANSIG *base, int count) 1072pipecb (EV_P_ ev_io *iow, int revents)
561{ 1073{
562 while (count--) 1074#if EV_USE_EVENTFD
1075 if (evfd >= 0)
1076 {
1077 uint64_t counter;
1078 read (evfd, &counter, sizeof (uint64_t));
563 { 1079 }
564 base->head = 0; 1080 else
1081#endif
1082 {
1083 char dummy;
1084 read (evpipe [0], &dummy, 1);
1085 }
1086
1087 if (gotsig && ev_is_default_loop (EV_A))
1088 {
1089 int signum;
565 base->gotsig = 0; 1090 gotsig = 0;
566 1091
567 ++base; 1092 for (signum = signalmax; signum--; )
1093 if (signals [signum].gotsig)
1094 ev_feed_signal_event (EV_A_ signum + 1);
1095 }
1096
1097#if EV_ASYNC_ENABLE
1098 if (gotasync)
568 } 1099 {
1100 int i;
1101 gotasync = 0;
1102
1103 for (i = asynccnt; i--; )
1104 if (asyncs [i]->sent)
1105 {
1106 asyncs [i]->sent = 0;
1107 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1108 }
1109 }
1110#endif
569} 1111}
1112
1113/*****************************************************************************/
570 1114
571static void 1115static void
572sighandler (int signum) 1116ev_sighandler (int signum)
573{ 1117{
1118#if EV_MULTIPLICITY
1119 struct ev_loop *loop = &default_loop_struct;
1120#endif
1121
574#if WIN32 1122#if _WIN32
575 signal (signum, sighandler); 1123 signal (signum, ev_sighandler);
576#endif 1124#endif
577 1125
578 signals [signum - 1].gotsig = 1; 1126 signals [signum - 1].gotsig = 1;
579 1127 evpipe_write (EV_A_ &gotsig);
580 if (!gotsig)
581 {
582 int old_errno = errno;
583 gotsig = 1;
584#ifdef WIN32
585 send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
586#else
587 write (sigpipe [1], &signum, 1);
588#endif
589 errno = old_errno;
590 }
591} 1128}
592 1129
593void 1130void noinline
594ev_feed_signal_event (EV_P_ int signum) 1131ev_feed_signal_event (EV_P_ int signum)
595{ 1132{
596 WL w; 1133 WL w;
597 1134
598#if EV_MULTIPLICITY 1135#if EV_MULTIPLICITY
599 assert (("feeding signal events is only supported in the default loop", loop == default_loop)); 1136 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
600#endif 1137#endif
601 1138
602 --signum; 1139 --signum;
603 1140
604 if (signum < 0 || signum >= signalmax) 1141 if (signum < 0 || signum >= signalmax)
… …
608 1145
609 for (w = signals [signum].head; w; w = w->next) 1146 for (w = signals [signum].head; w; w = w->next)
610 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1147 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
611} 1148}
612 1149
613static void
614sigcb (EV_P_ struct ev_io *iow, int revents)
615{
616 int signum;
617
618#ifdef WIN32
619 recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
620#else
621 read (sigpipe [0], &revents, 1);
622#endif
623 gotsig = 0;
624
625 for (signum = signalmax; signum--; )
626 if (signals [signum].gotsig)
627 ev_feed_signal_event (EV_A_ signum + 1);
628}
629
630static void
631siginit (EV_P)
632{
633#ifndef WIN32
634 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
635 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
636
637 /* rather than sort out wether we really need nb, set it */
638 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
639 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
640#endif
641
642 ev_io_set (&sigev, sigpipe [0], EV_READ);
643 ev_io_start (EV_A_ &sigev);
644 ev_unref (EV_A); /* child watcher should not keep loop alive */
645}
646
647/*****************************************************************************/ 1150/*****************************************************************************/
648 1151
649static struct ev_child *childs [PID_HASHSIZE]; 1152static WL childs [EV_PID_HASHSIZE];
650 1153
651#ifndef WIN32 1154#ifndef _WIN32
652 1155
653static struct ev_signal childev; 1156static ev_signal childev;
1157
1158#ifndef WIFCONTINUED
1159# define WIFCONTINUED(status) 0
1160#endif
1161
1162void inline_speed
1163child_reap (EV_P_ int chain, int pid, int status)
1164{
1165 ev_child *w;
1166 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1167
1168 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1169 {
1170 if ((w->pid == pid || !w->pid)
1171 && (!traced || (w->flags & 1)))
1172 {
1173 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1174 w->rpid = pid;
1175 w->rstatus = status;
1176 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1177 }
1178 }
1179}
654 1180
655#ifndef WCONTINUED 1181#ifndef WCONTINUED
656# define WCONTINUED 0 1182# define WCONTINUED 0
657#endif 1183#endif
658 1184
659static void 1185static void
660child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
661{
662 struct ev_child *w;
663
664 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
665 if (w->pid == pid || !w->pid)
666 {
667 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
668 w->rpid = pid;
669 w->rstatus = status;
670 ev_feed_event (EV_A_ (W)w, EV_CHILD);
671 }
672}
673
674static void
675childcb (EV_P_ struct ev_signal *sw, int revents) 1186childcb (EV_P_ ev_signal *sw, int revents)
676{ 1187{
677 int pid, status; 1188 int pid, status;
678 1189
1190 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
679 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1191 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
680 { 1192 if (!WCONTINUED
1193 || errno != EINVAL
1194 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1195 return;
1196
681 /* make sure we are called again until all childs have been reaped */ 1197 /* make sure we are called again until all children have been reaped */
1198 /* we need to do it this way so that the callback gets called before we continue */
682 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1199 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
683 1200
684 child_reap (EV_A_ sw, pid, pid, status); 1201 child_reap (EV_A_ pid, pid, status);
1202 if (EV_PID_HASHSIZE > 1)
685 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1203 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
686 }
687} 1204}
688 1205
689#endif 1206#endif
690 1207
691/*****************************************************************************/ 1208/*****************************************************************************/
692 1209
1210#if EV_USE_PORT
1211# include "ev_port.c"
1212#endif
693#if EV_USE_KQUEUE 1213#if EV_USE_KQUEUE
694# include "ev_kqueue.c" 1214# include "ev_kqueue.c"
695#endif 1215#endif
696#if EV_USE_EPOLL 1216#if EV_USE_EPOLL
697# include "ev_epoll.c" 1217# include "ev_epoll.c"
… …
714{ 1234{
715 return EV_VERSION_MINOR; 1235 return EV_VERSION_MINOR;
716} 1236}
717 1237
718/* return true if we are running with elevated privileges and should ignore env variables */ 1238/* return true if we are running with elevated privileges and should ignore env variables */
719static int 1239int inline_size
720enable_secure (void) 1240enable_secure (void)
721{ 1241{
722#ifdef WIN32 1242#ifdef _WIN32
723 return 0; 1243 return 0;
724#else 1244#else
725 return getuid () != geteuid () 1245 return getuid () != geteuid ()
726 || getgid () != getegid (); 1246 || getgid () != getegid ();
727#endif 1247#endif
728} 1248}
729 1249
730int 1250unsigned int
731ev_method (EV_P) 1251ev_supported_backends (void)
732{ 1252{
733 return method; 1253 unsigned int flags = 0;
734}
735 1254
736static void 1255 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
737loop_init (EV_P_ int methods) 1256 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1257 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1258 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1259 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1260
1261 return flags;
1262}
1263
1264unsigned int
1265ev_recommended_backends (void)
738{ 1266{
739 if (!method) 1267 unsigned int flags = ev_supported_backends ();
1268
1269#ifndef __NetBSD__
1270 /* kqueue is borked on everything but netbsd apparently */
1271 /* it usually doesn't work correctly on anything but sockets and pipes */
1272 flags &= ~EVBACKEND_KQUEUE;
1273#endif
1274#ifdef __APPLE__
1275 /* only select works correctly on that "unix-certified" platform */
1276 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1277 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1278#endif
1279
1280 return flags;
1281}
1282
1283unsigned int
1284ev_embeddable_backends (void)
1285{
1286 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1287
1288 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1289 /* please fix it and tell me how to detect the fix */
1290 flags &= ~EVBACKEND_EPOLL;
1291
1292 return flags;
1293}
1294
1295unsigned int
1296ev_backend (EV_P)
1297{
1298 return backend;
1299}
1300
1301unsigned int
1302ev_loop_count (EV_P)
1303{
1304 return loop_count;
1305}
1306
1307void
1308ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1309{
1310 io_blocktime = interval;
1311}
1312
1313void
1314ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1315{
1316 timeout_blocktime = interval;
1317}
1318
1319static void noinline
1320loop_init (EV_P_ unsigned int flags)
1321{
1322 if (!backend)
740 { 1323 {
741#if EV_USE_MONOTONIC 1324#if EV_USE_MONOTONIC
742 { 1325 {
743 struct timespec ts; 1326 struct timespec ts;
744 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1327 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
745 have_monotonic = 1; 1328 have_monotonic = 1;
746 } 1329 }
747#endif 1330#endif
748 1331
749 ev_rt_now = ev_time (); 1332 ev_rt_now = ev_time ();
750 mn_now = get_clock (); 1333 mn_now = get_clock ();
751 now_floor = mn_now; 1334 now_floor = mn_now;
752 rtmn_diff = ev_rt_now - mn_now; 1335 rtmn_diff = ev_rt_now - mn_now;
753 1336
754 if (methods == EVMETHOD_AUTO) 1337 io_blocktime = 0.;
755 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1338 timeout_blocktime = 0.;
1339 backend = 0;
1340 backend_fd = -1;
1341 gotasync = 0;
1342#if EV_USE_INOTIFY
1343 fs_fd = -2;
1344#endif
1345
1346 /* pid check not overridable via env */
1347#ifndef _WIN32
1348 if (flags & EVFLAG_FORKCHECK)
1349 curpid = getpid ();
1350#endif
1351
1352 if (!(flags & EVFLAG_NOENV)
1353 && !enable_secure ()
1354 && getenv ("LIBEV_FLAGS"))
756 methods = atoi (getenv ("LIBEV_METHODS")); 1355 flags = atoi (getenv ("LIBEV_FLAGS"));
757 else
758 methods = EVMETHOD_ANY;
759 1356
760 method = 0; 1357 if (!(flags & 0x0000ffffU))
761#if EV_USE_WIN32 1358 flags |= ev_recommended_backends ();
762 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods); 1359
1360#if EV_USE_PORT
1361 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
763#endif 1362#endif
764#if EV_USE_KQUEUE 1363#if EV_USE_KQUEUE
765 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); 1364 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
766#endif 1365#endif
767#if EV_USE_EPOLL 1366#if EV_USE_EPOLL
768 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); 1367 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
769#endif 1368#endif
770#if EV_USE_POLL 1369#if EV_USE_POLL
771 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 1370 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
772#endif 1371#endif
773#if EV_USE_SELECT 1372#if EV_USE_SELECT
774 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 1373 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
775#endif 1374#endif
776 1375
777 ev_init (&sigev, sigcb); 1376 ev_init (&pipeev, pipecb);
778 ev_set_priority (&sigev, EV_MAXPRI); 1377 ev_set_priority (&pipeev, EV_MAXPRI);
779 } 1378 }
780} 1379}
781 1380
782void 1381static void noinline
783loop_destroy (EV_P) 1382loop_destroy (EV_P)
784{ 1383{
785 int i; 1384 int i;
786 1385
1386 if (ev_is_active (&pipeev))
1387 {
1388 ev_ref (EV_A); /* signal watcher */
1389 ev_io_stop (EV_A_ &pipeev);
1390
1391#if EV_USE_EVENTFD
1392 if (evfd >= 0)
1393 close (evfd);
1394#endif
1395
1396 if (evpipe [0] >= 0)
1397 {
1398 close (evpipe [0]);
1399 close (evpipe [1]);
1400 }
1401 }
1402
787#if EV_USE_WIN32 1403#if EV_USE_INOTIFY
788 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A); 1404 if (fs_fd >= 0)
1405 close (fs_fd);
1406#endif
1407
1408 if (backend_fd >= 0)
1409 close (backend_fd);
1410
1411#if EV_USE_PORT
1412 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
789#endif 1413#endif
790#if EV_USE_KQUEUE 1414#if EV_USE_KQUEUE
791 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1415 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
792#endif 1416#endif
793#if EV_USE_EPOLL 1417#if EV_USE_EPOLL
794 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1418 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
795#endif 1419#endif
796#if EV_USE_POLL 1420#if EV_USE_POLL
797 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1421 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
798#endif 1422#endif
799#if EV_USE_SELECT 1423#if EV_USE_SELECT
800 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1424 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
801#endif 1425#endif
802 1426
803 for (i = NUMPRI; i--; ) 1427 for (i = NUMPRI; i--; )
1428 {
804 array_free (pending, [i]); 1429 array_free (pending, [i]);
1430#if EV_IDLE_ENABLE
1431 array_free (idle, [i]);
1432#endif
1433 }
1434
1435 ev_free (anfds); anfdmax = 0;
805 1436
806 /* have to use the microsoft-never-gets-it-right macro */ 1437 /* have to use the microsoft-never-gets-it-right macro */
807 array_free_microshit (fdchange); 1438 array_free (fdchange, EMPTY);
808 array_free_microshit (timer); 1439 array_free (timer, EMPTY);
809 array_free_microshit (periodic); 1440#if EV_PERIODIC_ENABLE
810 array_free_microshit (idle); 1441 array_free (periodic, EMPTY);
811 array_free_microshit (prepare); 1442#endif
812 array_free_microshit (check); 1443#if EV_FORK_ENABLE
1444 array_free (fork, EMPTY);
1445#endif
1446 array_free (prepare, EMPTY);
1447 array_free (check, EMPTY);
1448#if EV_ASYNC_ENABLE
1449 array_free (async, EMPTY);
1450#endif
813 1451
814 method = 0; 1452 backend = 0;
815} 1453}
816 1454
817static void 1455#if EV_USE_INOTIFY
1456void inline_size infy_fork (EV_P);
1457#endif
1458
1459void inline_size
818loop_fork (EV_P) 1460loop_fork (EV_P)
819{ 1461{
1462#if EV_USE_PORT
1463 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1464#endif
1465#if EV_USE_KQUEUE
1466 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1467#endif
820#if EV_USE_EPOLL 1468#if EV_USE_EPOLL
821 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1469 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
822#endif 1470#endif
823#if EV_USE_KQUEUE 1471#if EV_USE_INOTIFY
824 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 1472 infy_fork (EV_A);
825#endif 1473#endif
826 1474
827 if (ev_is_active (&sigev)) 1475 if (ev_is_active (&pipeev))
828 { 1476 {
829 /* default loop */ 1477 /* this "locks" the handlers against writing to the pipe */
1478 /* while we modify the fd vars */
1479 gotsig = 1;
1480#if EV_ASYNC_ENABLE
1481 gotasync = 1;
1482#endif
830 1483
831 ev_ref (EV_A); 1484 ev_ref (EV_A);
832 ev_io_stop (EV_A_ &sigev); 1485 ev_io_stop (EV_A_ &pipeev);
1486
1487#if EV_USE_EVENTFD
1488 if (evfd >= 0)
1489 close (evfd);
1490#endif
1491
1492 if (evpipe [0] >= 0)
1493 {
833 close (sigpipe [0]); 1494 close (evpipe [0]);
834 close (sigpipe [1]); 1495 close (evpipe [1]);
1496 }
835 1497
836 while (pipe (sigpipe))
837 syserr ("(libev) error creating pipe");
838
839 siginit (EV_A); 1498 evpipe_init (EV_A);
1499 /* now iterate over everything, in case we missed something */
1500 pipecb (EV_A_ &pipeev, EV_READ);
840 } 1501 }
841 1502
842 postfork = 0; 1503 postfork = 0;
843} 1504}
1505
1506#if EV_MULTIPLICITY
1507
1508struct ev_loop *
1509ev_loop_new (unsigned int flags)
1510{
1511 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1512
1513 memset (loop, 0, sizeof (struct ev_loop));
1514
1515 loop_init (EV_A_ flags);
1516
1517 if (ev_backend (EV_A))
1518 return loop;
1519
1520 return 0;
1521}
1522
1523void
1524ev_loop_destroy (EV_P)
1525{
1526 loop_destroy (EV_A);
1527 ev_free (loop);
1528}
1529
1530void
1531ev_loop_fork (EV_P)
1532{
1533 postfork = 1; /* must be in line with ev_default_fork */
1534}
1535
1536#if EV_VERIFY
1537static void noinline
1538verify_watcher (EV_P_ W w)
1539{
1540 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1541
1542 if (w->pending)
1543 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1544}
1545
1546static void noinline
1547verify_heap (EV_P_ ANHE *heap, int N)
1548{
1549 int i;
1550
1551 for (i = HEAP0; i < N + HEAP0; ++i)
1552 {
1553 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1554 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1555 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1556
1557 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1558 }
1559}
1560
1561static void noinline
1562array_verify (EV_P_ W *ws, int cnt)
1563{
1564 while (cnt--)
1565 {
1566 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1567 verify_watcher (EV_A_ ws [cnt]);
1568 }
1569}
1570#endif
1571
1572void
1573ev_loop_verify (EV_P)
1574{
1575#if EV_VERIFY
1576 int i;
1577 WL w;
1578
1579 assert (activecnt >= -1);
1580
1581 assert (fdchangemax >= fdchangecnt);
1582 for (i = 0; i < fdchangecnt; ++i)
1583 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1584
1585 assert (anfdmax >= 0);
1586 for (i = 0; i < anfdmax; ++i)
1587 for (w = anfds [i].head; w; w = w->next)
1588 {
1589 verify_watcher (EV_A_ (W)w);
1590 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1591 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1592 }
1593
1594 assert (timermax >= timercnt);
1595 verify_heap (EV_A_ timers, timercnt);
1596
1597#if EV_PERIODIC_ENABLE
1598 assert (periodicmax >= periodiccnt);
1599 verify_heap (EV_A_ periodics, periodiccnt);
1600#endif
1601
1602 for (i = NUMPRI; i--; )
1603 {
1604 assert (pendingmax [i] >= pendingcnt [i]);
1605#if EV_IDLE_ENABLE
1606 assert (idleall >= 0);
1607 assert (idlemax [i] >= idlecnt [i]);
1608 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1609#endif
1610 }
1611
1612#if EV_FORK_ENABLE
1613 assert (forkmax >= forkcnt);
1614 array_verify (EV_A_ (W *)forks, forkcnt);
1615#endif
1616
1617#if EV_ASYNC_ENABLE
1618 assert (asyncmax >= asynccnt);
1619 array_verify (EV_A_ (W *)asyncs, asynccnt);
1620#endif
1621
1622 assert (preparemax >= preparecnt);
1623 array_verify (EV_A_ (W *)prepares, preparecnt);
1624
1625 assert (checkmax >= checkcnt);
1626 array_verify (EV_A_ (W *)checks, checkcnt);
1627
1628# if 0
1629 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1630 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1631# endif
1632#endif
1633}
1634
1635#endif /* multiplicity */
844 1636
845#if EV_MULTIPLICITY 1637#if EV_MULTIPLICITY
846struct ev_loop * 1638struct ev_loop *
847ev_loop_new (int methods) 1639ev_default_loop_init (unsigned int flags)
848{
849 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
850
851 memset (loop, 0, sizeof (struct ev_loop));
852
853 loop_init (EV_A_ methods);
854
855 if (ev_method (EV_A))
856 return loop;
857
858 return 0;
859}
860
861void
862ev_loop_destroy (EV_P)
863{
864 loop_destroy (EV_A);
865 ev_free (loop);
866}
867
868void
869ev_loop_fork (EV_P)
870{
871 postfork = 1;
872}
873
874#endif
875
876#if EV_MULTIPLICITY
877struct ev_loop *
878#else 1640#else
879int 1641int
1642ev_default_loop (unsigned int flags)
880#endif 1643#endif
881ev_default_loop (int methods)
882{ 1644{
883 if (sigpipe [0] == sigpipe [1])
884 if (pipe (sigpipe))
885 return 0;
886
887 if (!default_loop) 1645 if (!ev_default_loop_ptr)
888 { 1646 {
889#if EV_MULTIPLICITY 1647#if EV_MULTIPLICITY
890 struct ev_loop *loop = default_loop = &default_loop_struct; 1648 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
891#else 1649#else
892 default_loop = 1; 1650 ev_default_loop_ptr = 1;
893#endif 1651#endif
894 1652
895 loop_init (EV_A_ methods); 1653 loop_init (EV_A_ flags);
896 1654
897 if (ev_method (EV_A)) 1655 if (ev_backend (EV_A))
898 { 1656 {
899 siginit (EV_A);
900
901#ifndef WIN32 1657#ifndef _WIN32
902 ev_signal_init (&childev, childcb, SIGCHLD); 1658 ev_signal_init (&childev, childcb, SIGCHLD);
903 ev_set_priority (&childev, EV_MAXPRI); 1659 ev_set_priority (&childev, EV_MAXPRI);
904 ev_signal_start (EV_A_ &childev); 1660 ev_signal_start (EV_A_ &childev);
905 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1661 ev_unref (EV_A); /* child watcher should not keep loop alive */
906#endif 1662#endif
907 } 1663 }
908 else 1664 else
909 default_loop = 0; 1665 ev_default_loop_ptr = 0;
910 } 1666 }
911 1667
912 return default_loop; 1668 return ev_default_loop_ptr;
913} 1669}
914 1670
915void 1671void
916ev_default_destroy (void) 1672ev_default_destroy (void)
917{ 1673{
918#if EV_MULTIPLICITY 1674#if EV_MULTIPLICITY
919 struct ev_loop *loop = default_loop; 1675 struct ev_loop *loop = ev_default_loop_ptr;
920#endif 1676#endif
921 1677
1678 ev_default_loop_ptr = 0;
1679
922#ifndef WIN32 1680#ifndef _WIN32
923 ev_ref (EV_A); /* child watcher */ 1681 ev_ref (EV_A); /* child watcher */
924 ev_signal_stop (EV_A_ &childev); 1682 ev_signal_stop (EV_A_ &childev);
925#endif 1683#endif
926 1684
927 ev_ref (EV_A); /* signal watcher */
928 ev_io_stop (EV_A_ &sigev);
929
930 close (sigpipe [0]); sigpipe [0] = 0;
931 close (sigpipe [1]); sigpipe [1] = 0;
932
933 loop_destroy (EV_A); 1685 loop_destroy (EV_A);
934} 1686}
935 1687
936void 1688void
937ev_default_fork (void) 1689ev_default_fork (void)
938{ 1690{
939#if EV_MULTIPLICITY 1691#if EV_MULTIPLICITY
940 struct ev_loop *loop = default_loop; 1692 struct ev_loop *loop = ev_default_loop_ptr;
941#endif 1693#endif
942 1694
943 if (method) 1695 postfork = 1; /* must be in line with ev_loop_fork */
944 postfork = 1;
945} 1696}
946 1697
947/*****************************************************************************/ 1698/*****************************************************************************/
948 1699
949static int 1700void
950any_pending (EV_P) 1701ev_invoke (EV_P_ void *w, int revents)
951{ 1702{
952 int pri; 1703 EV_CB_INVOKE ((W)w, revents);
953
954 for (pri = NUMPRI; pri--; )
955 if (pendingcnt [pri])
956 return 1;
957
958 return 0;
959} 1704}
960 1705
961static void 1706void inline_speed
962call_pending (EV_P) 1707call_pending (EV_P)
963{ 1708{
964 int pri; 1709 int pri;
965 1710
966 for (pri = NUMPRI; pri--; ) 1711 for (pri = NUMPRI; pri--; )
967 while (pendingcnt [pri]) 1712 while (pendingcnt [pri])
968 { 1713 {
969 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1714 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
970 1715
971 if (p->w) 1716 if (expect_true (p->w))
972 { 1717 {
1718 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1719
973 p->w->pending = 0; 1720 p->w->pending = 0;
974 EV_CB_INVOKE (p->w, p->events); 1721 EV_CB_INVOKE (p->w, p->events);
1722 EV_FREQUENT_CHECK;
975 } 1723 }
976 } 1724 }
977} 1725}
978 1726
979static void 1727#if EV_IDLE_ENABLE
1728void inline_size
1729idle_reify (EV_P)
1730{
1731 if (expect_false (idleall))
1732 {
1733 int pri;
1734
1735 for (pri = NUMPRI; pri--; )
1736 {
1737 if (pendingcnt [pri])
1738 break;
1739
1740 if (idlecnt [pri])
1741 {
1742 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1743 break;
1744 }
1745 }
1746 }
1747}
1748#endif
1749
1750void inline_size
980timers_reify (EV_P) 1751timers_reify (EV_P)
981{ 1752{
1753 EV_FREQUENT_CHECK;
1754
982 while (timercnt && ((WT)timers [0])->at <= mn_now) 1755 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
983 { 1756 {
984 struct ev_timer *w = timers [0]; 1757 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
985 1758
986 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1759 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
987 1760
988 /* first reschedule or stop timer */ 1761 /* first reschedule or stop timer */
989 if (w->repeat) 1762 if (w->repeat)
990 { 1763 {
1764 ev_at (w) += w->repeat;
1765 if (ev_at (w) < mn_now)
1766 ev_at (w) = mn_now;
1767
991 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1768 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
992 ((WT)w)->at = mn_now + w->repeat; 1769
1770 ANHE_at_cache (timers [HEAP0]);
993 downheap ((WT *)timers, timercnt, 0); 1771 downheap (timers, timercnt, HEAP0);
994 } 1772 }
995 else 1773 else
996 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1774 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
997 1775
1776 EV_FREQUENT_CHECK;
998 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 1777 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
999 } 1778 }
1000} 1779}
1001 1780
1002static void 1781#if EV_PERIODIC_ENABLE
1782void inline_size
1003periodics_reify (EV_P) 1783periodics_reify (EV_P)
1004{ 1784{
1785 EV_FREQUENT_CHECK;
1786
1005 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 1787 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1006 { 1788 {
1007 struct ev_periodic *w = periodics [0]; 1789 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1008 1790
1009 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1791 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1010 1792
1011 /* first reschedule or stop timer */ 1793 /* first reschedule or stop timer */
1012 if (w->reschedule_cb) 1794 if (w->reschedule_cb)
1013 { 1795 {
1014 ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 1796 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1015 1797
1016 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 1798 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1799
1800 ANHE_at_cache (periodics [HEAP0]);
1017 downheap ((WT *)periodics, periodiccnt, 0); 1801 downheap (periodics, periodiccnt, HEAP0);
1018 } 1802 }
1019 else if (w->interval) 1803 else if (w->interval)
1020 { 1804 {
1021 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; 1805 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1022 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now)); 1806 /* if next trigger time is not sufficiently in the future, put it there */
1807 /* this might happen because of floating point inexactness */
1808 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1809 {
1810 ev_at (w) += w->interval;
1811
1812 /* if interval is unreasonably low we might still have a time in the past */
1813 /* so correct this. this will make the periodic very inexact, but the user */
1814 /* has effectively asked to get triggered more often than possible */
1815 if (ev_at (w) < ev_rt_now)
1816 ev_at (w) = ev_rt_now;
1817 }
1818
1819 ANHE_at_cache (periodics [HEAP0]);
1023 downheap ((WT *)periodics, periodiccnt, 0); 1820 downheap (periodics, periodiccnt, HEAP0);
1024 } 1821 }
1025 else 1822 else
1026 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1823 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1027 1824
1825 EV_FREQUENT_CHECK;
1028 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 1826 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1029 } 1827 }
1030} 1828}
1031 1829
1032static void 1830static void noinline
1033periodics_reschedule (EV_P) 1831periodics_reschedule (EV_P)
1034{ 1832{
1035 int i; 1833 int i;
1036 1834
1037 /* adjust periodics after time jump */ 1835 /* adjust periodics after time jump */
1038 for (i = 0; i < periodiccnt; ++i) 1836 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1039 { 1837 {
1040 struct ev_periodic *w = periodics [i]; 1838 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1041 1839
1042 if (w->reschedule_cb) 1840 if (w->reschedule_cb)
1043 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 1841 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1044 else if (w->interval) 1842 else if (w->interval)
1045 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 1843 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1844
1845 ANHE_at_cache (periodics [i]);
1846 }
1847
1848 reheap (periodics, periodiccnt);
1849}
1850#endif
1851
1852void inline_speed
1853time_update (EV_P_ ev_tstamp max_block)
1854{
1855 int i;
1856
1857#if EV_USE_MONOTONIC
1858 if (expect_true (have_monotonic))
1046 } 1859 {
1860 ev_tstamp odiff = rtmn_diff;
1047 1861
1048 /* now rebuild the heap */
1049 for (i = periodiccnt >> 1; i--; )
1050 downheap ((WT *)periodics, periodiccnt, i);
1051}
1052
1053inline int
1054time_update_monotonic (EV_P)
1055{
1056 mn_now = get_clock (); 1862 mn_now = get_clock ();
1057 1863
1864 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1865 /* interpolate in the meantime */
1058 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 1866 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1059 { 1867 {
1060 ev_rt_now = rtmn_diff + mn_now; 1868 ev_rt_now = rtmn_diff + mn_now;
1061 return 0; 1869 return;
1062 } 1870 }
1063 else 1871
1064 {
1065 now_floor = mn_now; 1872 now_floor = mn_now;
1066 ev_rt_now = ev_time (); 1873 ev_rt_now = ev_time ();
1067 return 1;
1068 }
1069}
1070 1874
1071static void 1875 /* loop a few times, before making important decisions.
1072time_update (EV_P) 1876 * on the choice of "4": one iteration isn't enough,
1073{ 1877 * in case we get preempted during the calls to
1074 int i; 1878 * ev_time and get_clock. a second call is almost guaranteed
1075 1879 * to succeed in that case, though. and looping a few more times
1076#if EV_USE_MONOTONIC 1880 * doesn't hurt either as we only do this on time-jumps or
1077 if (expect_true (have_monotonic)) 1881 * in the unlikely event of having been preempted here.
1078 { 1882 */
1079 if (time_update_monotonic (EV_A)) 1883 for (i = 4; --i; )
1080 { 1884 {
1081 ev_tstamp odiff = rtmn_diff; 1885 rtmn_diff = ev_rt_now - mn_now;
1082 1886
1083 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1887 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1888 return; /* all is well */
1889
1890 ev_rt_now = ev_time ();
1891 mn_now = get_clock ();
1892 now_floor = mn_now;
1893 }
1894
1895# if EV_PERIODIC_ENABLE
1896 periodics_reschedule (EV_A);
1897# endif
1898 /* no timer adjustment, as the monotonic clock doesn't jump */
1899 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1900 }
1901 else
1902#endif
1903 {
1904 ev_rt_now = ev_time ();
1905
1906 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1907 {
1908#if EV_PERIODIC_ENABLE
1909 periodics_reschedule (EV_A);
1910#endif
1911 /* adjust timers. this is easy, as the offset is the same for all of them */
1912 for (i = 0; i < timercnt; ++i)
1084 { 1913 {
1085 rtmn_diff = ev_rt_now - mn_now; 1914 ANHE *he = timers + i + HEAP0;
1086 1915 ANHE_w (*he)->at += ev_rt_now - mn_now;
1087 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1916 ANHE_at_cache (*he);
1088 return; /* all is well */
1089
1090 ev_rt_now = ev_time ();
1091 mn_now = get_clock ();
1092 now_floor = mn_now;
1093 } 1917 }
1094
1095 periodics_reschedule (EV_A);
1096 /* no timer adjustment, as the monotonic clock doesn't jump */
1097 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1098 } 1918 }
1099 }
1100 else
1101#endif
1102 {
1103 ev_rt_now = ev_time ();
1104
1105 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1106 {
1107 periodics_reschedule (EV_A);
1108
1109 /* adjust timers. this is easy, as the offset is the same for all */
1110 for (i = 0; i < timercnt; ++i)
1111 ((WT)timers [i])->at += ev_rt_now - mn_now;
1112 }
1113 1919
1114 mn_now = ev_rt_now; 1920 mn_now = ev_rt_now;
1115 } 1921 }
1116} 1922}
1117 1923
… …
1125ev_unref (EV_P) 1931ev_unref (EV_P)
1126{ 1932{
1127 --activecnt; 1933 --activecnt;
1128} 1934}
1129 1935
1936void
1937ev_now_update (EV_P)
1938{
1939 time_update (EV_A_ 1e100);
1940}
1941
1130static int loop_done; 1942static int loop_done;
1131 1943
1132void 1944void
1133ev_loop (EV_P_ int flags) 1945ev_loop (EV_P_ int flags)
1134{ 1946{
1135 double block; 1947 loop_done = EVUNLOOP_CANCEL;
1136 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1948
1949 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1137 1950
1138 do 1951 do
1139 { 1952 {
1953#if EV_VERIFY >= 2
1954 ev_loop_verify (EV_A);
1955#endif
1956
1957#ifndef _WIN32
1958 if (expect_false (curpid)) /* penalise the forking check even more */
1959 if (expect_false (getpid () != curpid))
1960 {
1961 curpid = getpid ();
1962 postfork = 1;
1963 }
1964#endif
1965
1966#if EV_FORK_ENABLE
1967 /* we might have forked, so queue fork handlers */
1968 if (expect_false (postfork))
1969 if (forkcnt)
1970 {
1971 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1972 call_pending (EV_A);
1973 }
1974#endif
1975
1140 /* queue check watchers (and execute them) */ 1976 /* queue prepare watchers (and execute them) */
1141 if (expect_false (preparecnt)) 1977 if (expect_false (preparecnt))
1142 { 1978 {
1143 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1979 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1144 call_pending (EV_A); 1980 call_pending (EV_A);
1145 } 1981 }
1146 1982
1983 if (expect_false (!activecnt))
1984 break;
1985
1147 /* we might have forked, so reify kernel state if necessary */ 1986 /* we might have forked, so reify kernel state if necessary */
1148 if (expect_false (postfork)) 1987 if (expect_false (postfork))
1149 loop_fork (EV_A); 1988 loop_fork (EV_A);
1150 1989
1151 /* update fd-related kernel structures */ 1990 /* update fd-related kernel structures */
1152 fd_reify (EV_A); 1991 fd_reify (EV_A);
1153 1992
1154 /* calculate blocking time */ 1993 /* calculate blocking time */
1994 {
1995 ev_tstamp waittime = 0.;
1996 ev_tstamp sleeptime = 0.;
1155 1997
1156 /* we only need this for !monotonic clock or timers, but as we basically 1998 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1157 always have timers, we just calculate it always */
1158#if EV_USE_MONOTONIC
1159 if (expect_true (have_monotonic))
1160 time_update_monotonic (EV_A);
1161 else
1162#endif
1163 { 1999 {
1164 ev_rt_now = ev_time (); 2000 /* update time to cancel out callback processing overhead */
1165 mn_now = ev_rt_now; 2001 time_update (EV_A_ 1e100);
1166 }
1167 2002
1168 if (flags & EVLOOP_NONBLOCK || idlecnt)
1169 block = 0.;
1170 else
1171 {
1172 block = MAX_BLOCKTIME; 2003 waittime = MAX_BLOCKTIME;
1173 2004
1174 if (timercnt) 2005 if (timercnt)
1175 { 2006 {
1176 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 2007 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1177 if (block > to) block = to; 2008 if (waittime > to) waittime = to;
1178 } 2009 }
1179 2010
2011#if EV_PERIODIC_ENABLE
1180 if (periodiccnt) 2012 if (periodiccnt)
1181 { 2013 {
1182 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; 2014 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1183 if (block > to) block = to; 2015 if (waittime > to) waittime = to;
1184 } 2016 }
2017#endif
1185 2018
1186 if (block < 0.) block = 0.; 2019 if (expect_false (waittime < timeout_blocktime))
2020 waittime = timeout_blocktime;
2021
2022 sleeptime = waittime - backend_fudge;
2023
2024 if (expect_true (sleeptime > io_blocktime))
2025 sleeptime = io_blocktime;
2026
2027 if (sleeptime)
2028 {
2029 ev_sleep (sleeptime);
2030 waittime -= sleeptime;
2031 }
1187 } 2032 }
1188 2033
1189 method_poll (EV_A_ block); 2034 ++loop_count;
2035 backend_poll (EV_A_ waittime);
1190 2036
1191 /* update ev_rt_now, do magic */ 2037 /* update ev_rt_now, do magic */
1192 time_update (EV_A); 2038 time_update (EV_A_ waittime + sleeptime);
2039 }
1193 2040
1194 /* queue pending timers and reschedule them */ 2041 /* queue pending timers and reschedule them */
1195 timers_reify (EV_A); /* relative timers called last */ 2042 timers_reify (EV_A); /* relative timers called last */
2043#if EV_PERIODIC_ENABLE
1196 periodics_reify (EV_A); /* absolute timers called first */ 2044 periodics_reify (EV_A); /* absolute timers called first */
2045#endif
1197 2046
2047#if EV_IDLE_ENABLE
1198 /* queue idle watchers unless io or timers are pending */ 2048 /* queue idle watchers unless other events are pending */
1199 if (idlecnt && !any_pending (EV_A)) 2049 idle_reify (EV_A);
1200 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2050#endif
1201 2051
1202 /* queue check watchers, to be executed first */ 2052 /* queue check watchers, to be executed first */
1203 if (checkcnt) 2053 if (expect_false (checkcnt))
1204 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2054 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1205 2055
1206 call_pending (EV_A); 2056 call_pending (EV_A);
1207 } 2057 }
1208 while (activecnt && !loop_done); 2058 while (expect_true (
2059 activecnt
2060 && !loop_done
2061 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2062 ));
1209 2063
1210 if (loop_done != 2) 2064 if (loop_done == EVUNLOOP_ONE)
1211 loop_done = 0; 2065 loop_done = EVUNLOOP_CANCEL;
1212} 2066}
1213 2067
1214void 2068void
1215ev_unloop (EV_P_ int how) 2069ev_unloop (EV_P_ int how)
1216{ 2070{
1217 loop_done = how; 2071 loop_done = how;
1218} 2072}
1219 2073
1220/*****************************************************************************/ 2074/*****************************************************************************/
1221 2075
1222inline void 2076void inline_size
1223wlist_add (WL *head, WL elem) 2077wlist_add (WL *head, WL elem)
1224{ 2078{
1225 elem->next = *head; 2079 elem->next = *head;
1226 *head = elem; 2080 *head = elem;
1227} 2081}
1228 2082
1229inline void 2083void inline_size
1230wlist_del (WL *head, WL elem) 2084wlist_del (WL *head, WL elem)
1231{ 2085{
1232 while (*head) 2086 while (*head)
1233 { 2087 {
1234 if (*head == elem) 2088 if (*head == elem)
… …
1239 2093
1240 head = &(*head)->next; 2094 head = &(*head)->next;
1241 } 2095 }
1242} 2096}
1243 2097
1244inline void 2098void inline_speed
1245ev_clear_pending (EV_P_ W w) 2099clear_pending (EV_P_ W w)
1246{ 2100{
1247 if (w->pending) 2101 if (w->pending)
1248 { 2102 {
1249 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2103 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1250 w->pending = 0; 2104 w->pending = 0;
1251 } 2105 }
1252} 2106}
1253 2107
1254inline void 2108int
2109ev_clear_pending (EV_P_ void *w)
2110{
2111 W w_ = (W)w;
2112 int pending = w_->pending;
2113
2114 if (expect_true (pending))
2115 {
2116 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2117 w_->pending = 0;
2118 p->w = 0;
2119 return p->events;
2120 }
2121 else
2122 return 0;
2123}
2124
2125void inline_size
2126pri_adjust (EV_P_ W w)
2127{
2128 int pri = w->priority;
2129 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2130 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2131 w->priority = pri;
2132}
2133
2134void inline_speed
1255ev_start (EV_P_ W w, int active) 2135ev_start (EV_P_ W w, int active)
1256{ 2136{
1257 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2137 pri_adjust (EV_A_ w);
1258 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1259
1260 w->active = active; 2138 w->active = active;
1261 ev_ref (EV_A); 2139 ev_ref (EV_A);
1262} 2140}
1263 2141
1264inline void 2142void inline_size
1265ev_stop (EV_P_ W w) 2143ev_stop (EV_P_ W w)
1266{ 2144{
1267 ev_unref (EV_A); 2145 ev_unref (EV_A);
1268 w->active = 0; 2146 w->active = 0;
1269} 2147}
1270 2148
1271/*****************************************************************************/ 2149/*****************************************************************************/
1272 2150
1273void 2151void noinline
1274ev_io_start (EV_P_ struct ev_io *w) 2152ev_io_start (EV_P_ ev_io *w)
1275{ 2153{
1276 int fd = w->fd; 2154 int fd = w->fd;
1277 2155
2156 if (expect_false (ev_is_active (w)))
2157 return;
2158
2159 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2160 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));
2161
2162 EV_FREQUENT_CHECK;
2163
2164 ev_start (EV_A_ (W)w, 1);
2165 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2166 wlist_add (&anfds[fd].head, (WL)w);
2167
2168 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
2169 w->events &= ~EV_IOFDSET;
2170
2171 EV_FREQUENT_CHECK;
2172}
2173
2174void noinline
2175ev_io_stop (EV_P_ ev_io *w)
2176{
2177 clear_pending (EV_A_ (W)w);
2178 if (expect_false (!ev_is_active (w)))
2179 return;
2180
2181 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2182
2183 EV_FREQUENT_CHECK;
2184
2185 wlist_del (&anfds[w->fd].head, (WL)w);
2186 ev_stop (EV_A_ (W)w);
2187
2188 fd_change (EV_A_ w->fd, 1);
2189
2190 EV_FREQUENT_CHECK;
2191}
2192
2193void noinline
2194ev_timer_start (EV_P_ ev_timer *w)
2195{
2196 if (expect_false (ev_is_active (w)))
2197 return;
2198
2199 ev_at (w) += mn_now;
2200
2201 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2202
2203 EV_FREQUENT_CHECK;
2204
2205 ++timercnt;
2206 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2207 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2208 ANHE_w (timers [ev_active (w)]) = (WT)w;
2209 ANHE_at_cache (timers [ev_active (w)]);
2210 upheap (timers, ev_active (w));
2211
2212 EV_FREQUENT_CHECK;
2213
2214 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2215}
2216
2217void noinline
2218ev_timer_stop (EV_P_ ev_timer *w)
2219{
2220 clear_pending (EV_A_ (W)w);
2221 if (expect_false (!ev_is_active (w)))
2222 return;
2223
2224 EV_FREQUENT_CHECK;
2225
2226 {
2227 int active = ev_active (w);
2228
2229 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2230
2231 --timercnt;
2232
2233 if (expect_true (active < timercnt + HEAP0))
2234 {
2235 timers [active] = timers [timercnt + HEAP0];
2236 adjustheap (timers, timercnt, active);
2237 }
2238 }
2239
2240 EV_FREQUENT_CHECK;
2241
2242 ev_at (w) -= mn_now;
2243
2244 ev_stop (EV_A_ (W)w);
2245}
2246
2247void noinline
2248ev_timer_again (EV_P_ ev_timer *w)
2249{
2250 EV_FREQUENT_CHECK;
2251
1278 if (ev_is_active (w)) 2252 if (ev_is_active (w))
1279 return;
1280
1281 assert (("ev_io_start called with negative fd", fd >= 0));
1282
1283 ev_start (EV_A_ (W)w, 1);
1284 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1285 wlist_add ((WL *)&anfds[fd].head, (WL)w);
1286
1287 fd_change (EV_A_ fd);
1288}
1289
1290void
1291ev_io_stop (EV_P_ struct ev_io *w)
1292{
1293 ev_clear_pending (EV_A_ (W)w);
1294 if (!ev_is_active (w))
1295 return;
1296
1297 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
1298 ev_stop (EV_A_ (W)w);
1299
1300 fd_change (EV_A_ w->fd);
1301}
1302
1303void
1304ev_timer_start (EV_P_ struct ev_timer *w)
1305{
1306 if (ev_is_active (w))
1307 return;
1308
1309 ((WT)w)->at += mn_now;
1310
1311 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1312
1313 ev_start (EV_A_ (W)w, ++timercnt);
1314 array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
1315 timers [timercnt - 1] = w;
1316 upheap ((WT *)timers, timercnt - 1);
1317
1318 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1319}
1320
1321void
1322ev_timer_stop (EV_P_ struct ev_timer *w)
1323{
1324 ev_clear_pending (EV_A_ (W)w);
1325 if (!ev_is_active (w))
1326 return;
1327
1328 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1329
1330 if (((W)w)->active < timercnt--)
1331 {
1332 timers [((W)w)->active - 1] = timers [timercnt];
1333 downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1334 }
1335
1336 ((WT)w)->at = w->repeat;
1337
1338 ev_stop (EV_A_ (W)w);
1339}
1340
1341void
1342ev_timer_again (EV_P_ struct ev_timer *w)
1343{
1344 if (ev_is_active (w))
1345 { 2253 {
1346 if (w->repeat) 2254 if (w->repeat)
1347 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat); 2255 {
2256 ev_at (w) = mn_now + w->repeat;
2257 ANHE_at_cache (timers [ev_active (w)]);
2258 adjustheap (timers, timercnt, ev_active (w));
2259 }
1348 else 2260 else
1349 ev_timer_stop (EV_A_ w); 2261 ev_timer_stop (EV_A_ w);
1350 } 2262 }
1351 else if (w->repeat) 2263 else if (w->repeat)
2264 {
2265 ev_at (w) = w->repeat;
1352 ev_timer_start (EV_A_ w); 2266 ev_timer_start (EV_A_ w);
1353} 2267 }
1354 2268
1355void 2269 EV_FREQUENT_CHECK;
2270}
2271
2272#if EV_PERIODIC_ENABLE
2273void noinline
1356ev_periodic_start (EV_P_ struct ev_periodic *w) 2274ev_periodic_start (EV_P_ ev_periodic *w)
1357{ 2275{
1358 if (ev_is_active (w)) 2276 if (expect_false (ev_is_active (w)))
1359 return; 2277 return;
1360 2278
1361 if (w->reschedule_cb) 2279 if (w->reschedule_cb)
1362 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2280 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1363 else if (w->interval) 2281 else if (w->interval)
1364 { 2282 {
1365 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2283 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1366 /* this formula differs from the one in periodic_reify because we do not always round up */ 2284 /* this formula differs from the one in periodic_reify because we do not always round up */
1367 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2285 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1368 } 2286 }
2287 else
2288 ev_at (w) = w->offset;
1369 2289
2290 EV_FREQUENT_CHECK;
2291
2292 ++periodiccnt;
1370 ev_start (EV_A_ (W)w, ++periodiccnt); 2293 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1371 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); 2294 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1372 periodics [periodiccnt - 1] = w; 2295 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1373 upheap ((WT *)periodics, periodiccnt - 1); 2296 ANHE_at_cache (periodics [ev_active (w)]);
2297 upheap (periodics, ev_active (w));
1374 2298
2299 EV_FREQUENT_CHECK;
2300
1375 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2301 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1376} 2302}
1377 2303
1378void 2304void noinline
1379ev_periodic_stop (EV_P_ struct ev_periodic *w) 2305ev_periodic_stop (EV_P_ ev_periodic *w)
1380{ 2306{
1381 ev_clear_pending (EV_A_ (W)w); 2307 clear_pending (EV_A_ (W)w);
1382 if (!ev_is_active (w)) 2308 if (expect_false (!ev_is_active (w)))
1383 return; 2309 return;
1384 2310
2311 EV_FREQUENT_CHECK;
2312
2313 {
2314 int active = ev_active (w);
2315
1385 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2316 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1386 2317
1387 if (((W)w)->active < periodiccnt--) 2318 --periodiccnt;
2319
2320 if (expect_true (active < periodiccnt + HEAP0))
1388 { 2321 {
1389 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2322 periodics [active] = periodics [periodiccnt + HEAP0];
1390 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2323 adjustheap (periodics, periodiccnt, active);
1391 } 2324 }
2325 }
2326
2327 EV_FREQUENT_CHECK;
1392 2328
1393 ev_stop (EV_A_ (W)w); 2329 ev_stop (EV_A_ (W)w);
1394} 2330}
1395 2331
1396void 2332void noinline
1397ev_periodic_again (EV_P_ struct ev_periodic *w) 2333ev_periodic_again (EV_P_ ev_periodic *w)
1398{ 2334{
1399 /* TODO: use adjustheap and recalculation */ 2335 /* TODO: use adjustheap and recalculation */
1400 ev_periodic_stop (EV_A_ w); 2336 ev_periodic_stop (EV_A_ w);
1401 ev_periodic_start (EV_A_ w); 2337 ev_periodic_start (EV_A_ w);
1402} 2338}
1403 2339#endif
1404void
1405ev_idle_start (EV_P_ struct ev_idle *w)
1406{
1407 if (ev_is_active (w))
1408 return;
1409
1410 ev_start (EV_A_ (W)w, ++idlecnt);
1411 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1412 idles [idlecnt - 1] = w;
1413}
1414
1415void
1416ev_idle_stop (EV_P_ struct ev_idle *w)
1417{
1418 ev_clear_pending (EV_A_ (W)w);
1419 if (ev_is_active (w))
1420 return;
1421
1422 idles [((W)w)->active - 1] = idles [--idlecnt];
1423 ev_stop (EV_A_ (W)w);
1424}
1425
1426void
1427ev_prepare_start (EV_P_ struct ev_prepare *w)
1428{
1429 if (ev_is_active (w))
1430 return;
1431
1432 ev_start (EV_A_ (W)w, ++preparecnt);
1433 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1434 prepares [preparecnt - 1] = w;
1435}
1436
1437void
1438ev_prepare_stop (EV_P_ struct ev_prepare *w)
1439{
1440 ev_clear_pending (EV_A_ (W)w);
1441 if (ev_is_active (w))
1442 return;
1443
1444 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1445 ev_stop (EV_A_ (W)w);
1446}
1447
1448void
1449ev_check_start (EV_P_ struct ev_check *w)
1450{
1451 if (ev_is_active (w))
1452 return;
1453
1454 ev_start (EV_A_ (W)w, ++checkcnt);
1455 array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1456 checks [checkcnt - 1] = w;
1457}
1458
1459void
1460ev_check_stop (EV_P_ struct ev_check *w)
1461{
1462 ev_clear_pending (EV_A_ (W)w);
1463 if (ev_is_active (w))
1464 return;
1465
1466 checks [((W)w)->active - 1] = checks [--checkcnt];
1467 ev_stop (EV_A_ (W)w);
1468}
1469 2340
1470#ifndef SA_RESTART 2341#ifndef SA_RESTART
1471# define SA_RESTART 0 2342# define SA_RESTART 0
1472#endif 2343#endif
1473 2344
1474void 2345void noinline
1475ev_signal_start (EV_P_ struct ev_signal *w) 2346ev_signal_start (EV_P_ ev_signal *w)
1476{ 2347{
1477#if EV_MULTIPLICITY 2348#if EV_MULTIPLICITY
1478 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2349 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1479#endif 2350#endif
1480 if (ev_is_active (w)) 2351 if (expect_false (ev_is_active (w)))
1481 return; 2352 return;
1482 2353
1483 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2354 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2355
2356 evpipe_init (EV_A);
2357
2358 EV_FREQUENT_CHECK;
2359
2360 {
2361#ifndef _WIN32
2362 sigset_t full, prev;
2363 sigfillset (&full);
2364 sigprocmask (SIG_SETMASK, &full, &prev);
2365#endif
2366
2367 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2368
2369#ifndef _WIN32
2370 sigprocmask (SIG_SETMASK, &prev, 0);
2371#endif
2372 }
1484 2373
1485 ev_start (EV_A_ (W)w, 1); 2374 ev_start (EV_A_ (W)w, 1);
1486 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1487 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2375 wlist_add (&signals [w->signum - 1].head, (WL)w);
1488 2376
1489 if (!((WL)w)->next) 2377 if (!((WL)w)->next)
1490 { 2378 {
1491#if WIN32 2379#if _WIN32
1492 signal (w->signum, sighandler); 2380 signal (w->signum, ev_sighandler);
1493#else 2381#else
1494 struct sigaction sa; 2382 struct sigaction sa;
1495 sa.sa_handler = sighandler; 2383 sa.sa_handler = ev_sighandler;
1496 sigfillset (&sa.sa_mask); 2384 sigfillset (&sa.sa_mask);
1497 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2385 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1498 sigaction (w->signum, &sa, 0); 2386 sigaction (w->signum, &sa, 0);
1499#endif 2387#endif
1500 } 2388 }
1501}
1502 2389
1503void 2390 EV_FREQUENT_CHECK;
2391}
2392
2393void noinline
1504ev_signal_stop (EV_P_ struct ev_signal *w) 2394ev_signal_stop (EV_P_ ev_signal *w)
1505{ 2395{
1506 ev_clear_pending (EV_A_ (W)w); 2396 clear_pending (EV_A_ (W)w);
1507 if (!ev_is_active (w)) 2397 if (expect_false (!ev_is_active (w)))
1508 return; 2398 return;
1509 2399
2400 EV_FREQUENT_CHECK;
2401
1510 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2402 wlist_del (&signals [w->signum - 1].head, (WL)w);
1511 ev_stop (EV_A_ (W)w); 2403 ev_stop (EV_A_ (W)w);
1512 2404
1513 if (!signals [w->signum - 1].head) 2405 if (!signals [w->signum - 1].head)
1514 signal (w->signum, SIG_DFL); 2406 signal (w->signum, SIG_DFL);
1515}
1516 2407
2408 EV_FREQUENT_CHECK;
2409}
2410
1517void 2411void
1518ev_child_start (EV_P_ struct ev_child *w) 2412ev_child_start (EV_P_ ev_child *w)
1519{ 2413{
1520#if EV_MULTIPLICITY 2414#if EV_MULTIPLICITY
1521 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2415 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1522#endif 2416#endif
1523 if (ev_is_active (w)) 2417 if (expect_false (ev_is_active (w)))
1524 return; 2418 return;
1525 2419
2420 EV_FREQUENT_CHECK;
2421
1526 ev_start (EV_A_ (W)w, 1); 2422 ev_start (EV_A_ (W)w, 1);
1527 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2423 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1528}
1529 2424
2425 EV_FREQUENT_CHECK;
2426}
2427
1530void 2428void
1531ev_child_stop (EV_P_ struct ev_child *w) 2429ev_child_stop (EV_P_ ev_child *w)
1532{ 2430{
1533 ev_clear_pending (EV_A_ (W)w); 2431 clear_pending (EV_A_ (W)w);
1534 if (ev_is_active (w)) 2432 if (expect_false (!ev_is_active (w)))
1535 return; 2433 return;
1536 2434
2435 EV_FREQUENT_CHECK;
2436
1537 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2437 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1538 ev_stop (EV_A_ (W)w); 2438 ev_stop (EV_A_ (W)w);
2439
2440 EV_FREQUENT_CHECK;
1539} 2441}
2442
2443#if EV_STAT_ENABLE
2444
2445# ifdef _WIN32
2446# undef lstat
2447# define lstat(a,b) _stati64 (a,b)
2448# endif
2449
2450#define DEF_STAT_INTERVAL 5.0074891
2451#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2452#define MIN_STAT_INTERVAL 0.1074891
2453
2454static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2455
2456#if EV_USE_INOTIFY
2457# define EV_INOTIFY_BUFSIZE 8192
2458
2459static void noinline
2460infy_add (EV_P_ ev_stat *w)
2461{
2462 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);
2463
2464 if (w->wd < 0)
2465 {
2466 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2467 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2468
2469 /* monitor some parent directory for speedup hints */
2470 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2471 /* but an efficiency issue only */
2472 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2473 {
2474 char path [4096];
2475 strcpy (path, w->path);
2476
2477 do
2478 {
2479 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2480 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2481
2482 char *pend = strrchr (path, '/');
2483
2484 if (!pend || pend == path)
2485 break;
2486
2487 *pend = 0;
2488 w->wd = inotify_add_watch (fs_fd, path, mask);
2489 }
2490 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2491 }
2492 }
2493
2494 if (w->wd >= 0)
2495 {
2496 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2497
2498 /* now local changes will be tracked by inotify, but remote changes won't */
2499 /* unless the filesystem it known to be local, we therefore still poll */
2500 /* also do poll on <2.6.25, but with normal frequency */
2501 struct statfs sfs;
2502
2503 if (fs_2625 && !statfs (w->path, &sfs))
2504 if (sfs.f_type == 0x1373 /* devfs */
2505 || sfs.f_type == 0xEF53 /* ext2/3 */
2506 || sfs.f_type == 0x3153464a /* jfs */
2507 || sfs.f_type == 0x52654973 /* reiser3 */
2508 || sfs.f_type == 0x01021994 /* tempfs */
2509 || sfs.f_type == 0x58465342 /* xfs */)
2510 return;
2511
2512 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2513 ev_timer_again (EV_A_ &w->timer);
2514 }
2515}
2516
2517static void noinline
2518infy_del (EV_P_ ev_stat *w)
2519{
2520 int slot;
2521 int wd = w->wd;
2522
2523 if (wd < 0)
2524 return;
2525
2526 w->wd = -2;
2527 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2528 wlist_del (&fs_hash [slot].head, (WL)w);
2529
2530 /* remove this watcher, if others are watching it, they will rearm */
2531 inotify_rm_watch (fs_fd, wd);
2532}
2533
2534static void noinline
2535infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2536{
2537 if (slot < 0)
2538 /* overflow, need to check for all hash slots */
2539 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2540 infy_wd (EV_A_ slot, wd, ev);
2541 else
2542 {
2543 WL w_;
2544
2545 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2546 {
2547 ev_stat *w = (ev_stat *)w_;
2548 w_ = w_->next; /* lets us remove this watcher and all before it */
2549
2550 if (w->wd == wd || wd == -1)
2551 {
2552 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2553 {
2554 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2555 w->wd = -1;
2556 infy_add (EV_A_ w); /* re-add, no matter what */
2557 }
2558
2559 stat_timer_cb (EV_A_ &w->timer, 0);
2560 }
2561 }
2562 }
2563}
2564
2565static void
2566infy_cb (EV_P_ ev_io *w, int revents)
2567{
2568 char buf [EV_INOTIFY_BUFSIZE];
2569 struct inotify_event *ev = (struct inotify_event *)buf;
2570 int ofs;
2571 int len = read (fs_fd, buf, sizeof (buf));
2572
2573 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2574 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2575}
2576
2577void inline_size
2578check_2625 (EV_P)
2579{
2580 /* kernels < 2.6.25 are borked
2581 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2582 */
2583 struct utsname buf;
2584 int major, minor, micro;
2585
2586 if (uname (&buf))
2587 return;
2588
2589 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2590 return;
2591
2592 if (major < 2
2593 || (major == 2 && minor < 6)
2594 || (major == 2 && minor == 6 && micro < 25))
2595 return;
2596
2597 fs_2625 = 1;
2598}
2599
2600void inline_size
2601infy_init (EV_P)
2602{
2603 if (fs_fd != -2)
2604 return;
2605
2606 fs_fd = -1;
2607
2608 check_2625 (EV_A);
2609
2610 fs_fd = inotify_init ();
2611
2612 if (fs_fd >= 0)
2613 {
2614 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2615 ev_set_priority (&fs_w, EV_MAXPRI);
2616 ev_io_start (EV_A_ &fs_w);
2617 }
2618}
2619
2620void inline_size
2621infy_fork (EV_P)
2622{
2623 int slot;
2624
2625 if (fs_fd < 0)
2626 return;
2627
2628 close (fs_fd);
2629 fs_fd = inotify_init ();
2630
2631 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2632 {
2633 WL w_ = fs_hash [slot].head;
2634 fs_hash [slot].head = 0;
2635
2636 while (w_)
2637 {
2638 ev_stat *w = (ev_stat *)w_;
2639 w_ = w_->next; /* lets us add this watcher */
2640
2641 w->wd = -1;
2642
2643 if (fs_fd >= 0)
2644 infy_add (EV_A_ w); /* re-add, no matter what */
2645 else
2646 ev_timer_again (EV_A_ &w->timer);
2647 }
2648 }
2649}
2650
2651#endif
2652
2653#ifdef _WIN32
2654# define EV_LSTAT(p,b) _stati64 (p, b)
2655#else
2656# define EV_LSTAT(p,b) lstat (p, b)
2657#endif
2658
2659void
2660ev_stat_stat (EV_P_ ev_stat *w)
2661{
2662 if (lstat (w->path, &w->attr) < 0)
2663 w->attr.st_nlink = 0;
2664 else if (!w->attr.st_nlink)
2665 w->attr.st_nlink = 1;
2666}
2667
2668static void noinline
2669stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2670{
2671 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2672
2673 /* we copy this here each the time so that */
2674 /* prev has the old value when the callback gets invoked */
2675 w->prev = w->attr;
2676 ev_stat_stat (EV_A_ w);
2677
2678 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2679 if (
2680 w->prev.st_dev != w->attr.st_dev
2681 || w->prev.st_ino != w->attr.st_ino
2682 || w->prev.st_mode != w->attr.st_mode
2683 || w->prev.st_nlink != w->attr.st_nlink
2684 || w->prev.st_uid != w->attr.st_uid
2685 || w->prev.st_gid != w->attr.st_gid
2686 || w->prev.st_rdev != w->attr.st_rdev
2687 || w->prev.st_size != w->attr.st_size
2688 || w->prev.st_atime != w->attr.st_atime
2689 || w->prev.st_mtime != w->attr.st_mtime
2690 || w->prev.st_ctime != w->attr.st_ctime
2691 ) {
2692 #if EV_USE_INOTIFY
2693 if (fs_fd >= 0)
2694 {
2695 infy_del (EV_A_ w);
2696 infy_add (EV_A_ w);
2697 ev_stat_stat (EV_A_ w); /* avoid race... */
2698 }
2699 #endif
2700
2701 ev_feed_event (EV_A_ w, EV_STAT);
2702 }
2703}
2704
2705void
2706ev_stat_start (EV_P_ ev_stat *w)
2707{
2708 if (expect_false (ev_is_active (w)))
2709 return;
2710
2711 ev_stat_stat (EV_A_ w);
2712
2713 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2714 w->interval = MIN_STAT_INTERVAL;
2715
2716 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2717 ev_set_priority (&w->timer, ev_priority (w));
2718
2719#if EV_USE_INOTIFY
2720 infy_init (EV_A);
2721
2722 if (fs_fd >= 0)
2723 infy_add (EV_A_ w);
2724 else
2725#endif
2726 ev_timer_again (EV_A_ &w->timer);
2727
2728 ev_start (EV_A_ (W)w, 1);
2729
2730 EV_FREQUENT_CHECK;
2731}
2732
2733void
2734ev_stat_stop (EV_P_ ev_stat *w)
2735{
2736 clear_pending (EV_A_ (W)w);
2737 if (expect_false (!ev_is_active (w)))
2738 return;
2739
2740 EV_FREQUENT_CHECK;
2741
2742#if EV_USE_INOTIFY
2743 infy_del (EV_A_ w);
2744#endif
2745 ev_timer_stop (EV_A_ &w->timer);
2746
2747 ev_stop (EV_A_ (W)w);
2748
2749 EV_FREQUENT_CHECK;
2750}
2751#endif
2752
2753#if EV_IDLE_ENABLE
2754void
2755ev_idle_start (EV_P_ ev_idle *w)
2756{
2757 if (expect_false (ev_is_active (w)))
2758 return;
2759
2760 pri_adjust (EV_A_ (W)w);
2761
2762 EV_FREQUENT_CHECK;
2763
2764 {
2765 int active = ++idlecnt [ABSPRI (w)];
2766
2767 ++idleall;
2768 ev_start (EV_A_ (W)w, active);
2769
2770 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2771 idles [ABSPRI (w)][active - 1] = w;
2772 }
2773
2774 EV_FREQUENT_CHECK;
2775}
2776
2777void
2778ev_idle_stop (EV_P_ ev_idle *w)
2779{
2780 clear_pending (EV_A_ (W)w);
2781 if (expect_false (!ev_is_active (w)))
2782 return;
2783
2784 EV_FREQUENT_CHECK;
2785
2786 {
2787 int active = ev_active (w);
2788
2789 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2790 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2791
2792 ev_stop (EV_A_ (W)w);
2793 --idleall;
2794 }
2795
2796 EV_FREQUENT_CHECK;
2797}
2798#endif
2799
2800void
2801ev_prepare_start (EV_P_ ev_prepare *w)
2802{
2803 if (expect_false (ev_is_active (w)))
2804 return;
2805
2806 EV_FREQUENT_CHECK;
2807
2808 ev_start (EV_A_ (W)w, ++preparecnt);
2809 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2810 prepares [preparecnt - 1] = w;
2811
2812 EV_FREQUENT_CHECK;
2813}
2814
2815void
2816ev_prepare_stop (EV_P_ ev_prepare *w)
2817{
2818 clear_pending (EV_A_ (W)w);
2819 if (expect_false (!ev_is_active (w)))
2820 return;
2821
2822 EV_FREQUENT_CHECK;
2823
2824 {
2825 int active = ev_active (w);
2826
2827 prepares [active - 1] = prepares [--preparecnt];
2828 ev_active (prepares [active - 1]) = active;
2829 }
2830
2831 ev_stop (EV_A_ (W)w);
2832
2833 EV_FREQUENT_CHECK;
2834}
2835
2836void
2837ev_check_start (EV_P_ ev_check *w)
2838{
2839 if (expect_false (ev_is_active (w)))
2840 return;
2841
2842 EV_FREQUENT_CHECK;
2843
2844 ev_start (EV_A_ (W)w, ++checkcnt);
2845 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2846 checks [checkcnt - 1] = w;
2847
2848 EV_FREQUENT_CHECK;
2849}
2850
2851void
2852ev_check_stop (EV_P_ ev_check *w)
2853{
2854 clear_pending (EV_A_ (W)w);
2855 if (expect_false (!ev_is_active (w)))
2856 return;
2857
2858 EV_FREQUENT_CHECK;
2859
2860 {
2861 int active = ev_active (w);
2862
2863 checks [active - 1] = checks [--checkcnt];
2864 ev_active (checks [active - 1]) = active;
2865 }
2866
2867 ev_stop (EV_A_ (W)w);
2868
2869 EV_FREQUENT_CHECK;
2870}
2871
2872#if EV_EMBED_ENABLE
2873void noinline
2874ev_embed_sweep (EV_P_ ev_embed *w)
2875{
2876 ev_loop (w->other, EVLOOP_NONBLOCK);
2877}
2878
2879static void
2880embed_io_cb (EV_P_ ev_io *io, int revents)
2881{
2882 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2883
2884 if (ev_cb (w))
2885 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2886 else
2887 ev_loop (w->other, EVLOOP_NONBLOCK);
2888}
2889
2890static void
2891embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2892{
2893 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2894
2895 {
2896 struct ev_loop *loop = w->other;
2897
2898 while (fdchangecnt)
2899 {
2900 fd_reify (EV_A);
2901 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2902 }
2903 }
2904}
2905
2906static void
2907embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2908{
2909 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2910
2911 ev_embed_stop (EV_A_ w);
2912
2913 {
2914 struct ev_loop *loop = w->other;
2915
2916 ev_loop_fork (EV_A);
2917 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2918 }
2919
2920 ev_embed_start (EV_A_ w);
2921}
2922
2923#if 0
2924static void
2925embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2926{
2927 ev_idle_stop (EV_A_ idle);
2928}
2929#endif
2930
2931void
2932ev_embed_start (EV_P_ ev_embed *w)
2933{
2934 if (expect_false (ev_is_active (w)))
2935 return;
2936
2937 {
2938 struct ev_loop *loop = w->other;
2939 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2940 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2941 }
2942
2943 EV_FREQUENT_CHECK;
2944
2945 ev_set_priority (&w->io, ev_priority (w));
2946 ev_io_start (EV_A_ &w->io);
2947
2948 ev_prepare_init (&w->prepare, embed_prepare_cb);
2949 ev_set_priority (&w->prepare, EV_MINPRI);
2950 ev_prepare_start (EV_A_ &w->prepare);
2951
2952 ev_fork_init (&w->fork, embed_fork_cb);
2953 ev_fork_start (EV_A_ &w->fork);
2954
2955 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2956
2957 ev_start (EV_A_ (W)w, 1);
2958
2959 EV_FREQUENT_CHECK;
2960}
2961
2962void
2963ev_embed_stop (EV_P_ ev_embed *w)
2964{
2965 clear_pending (EV_A_ (W)w);
2966 if (expect_false (!ev_is_active (w)))
2967 return;
2968
2969 EV_FREQUENT_CHECK;
2970
2971 ev_io_stop (EV_A_ &w->io);
2972 ev_prepare_stop (EV_A_ &w->prepare);
2973 ev_fork_stop (EV_A_ &w->fork);
2974
2975 EV_FREQUENT_CHECK;
2976}
2977#endif
2978
2979#if EV_FORK_ENABLE
2980void
2981ev_fork_start (EV_P_ ev_fork *w)
2982{
2983 if (expect_false (ev_is_active (w)))
2984 return;
2985
2986 EV_FREQUENT_CHECK;
2987
2988 ev_start (EV_A_ (W)w, ++forkcnt);
2989 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2990 forks [forkcnt - 1] = w;
2991
2992 EV_FREQUENT_CHECK;
2993}
2994
2995void
2996ev_fork_stop (EV_P_ ev_fork *w)
2997{
2998 clear_pending (EV_A_ (W)w);
2999 if (expect_false (!ev_is_active (w)))
3000 return;
3001
3002 EV_FREQUENT_CHECK;
3003
3004 {
3005 int active = ev_active (w);
3006
3007 forks [active - 1] = forks [--forkcnt];
3008 ev_active (forks [active - 1]) = active;
3009 }
3010
3011 ev_stop (EV_A_ (W)w);
3012
3013 EV_FREQUENT_CHECK;
3014}
3015#endif
3016
3017#if EV_ASYNC_ENABLE
3018void
3019ev_async_start (EV_P_ ev_async *w)
3020{
3021 if (expect_false (ev_is_active (w)))
3022 return;
3023
3024 evpipe_init (EV_A);
3025
3026 EV_FREQUENT_CHECK;
3027
3028 ev_start (EV_A_ (W)w, ++asynccnt);
3029 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3030 asyncs [asynccnt - 1] = w;
3031
3032 EV_FREQUENT_CHECK;
3033}
3034
3035void
3036ev_async_stop (EV_P_ ev_async *w)
3037{
3038 clear_pending (EV_A_ (W)w);
3039 if (expect_false (!ev_is_active (w)))
3040 return;
3041
3042 EV_FREQUENT_CHECK;
3043
3044 {
3045 int active = ev_active (w);
3046
3047 asyncs [active - 1] = asyncs [--asynccnt];
3048 ev_active (asyncs [active - 1]) = active;
3049 }
3050
3051 ev_stop (EV_A_ (W)w);
3052
3053 EV_FREQUENT_CHECK;
3054}
3055
3056void
3057ev_async_send (EV_P_ ev_async *w)
3058{
3059 w->sent = 1;
3060 evpipe_write (EV_A_ &gotasync);
3061}
3062#endif
1540 3063
1541/*****************************************************************************/ 3064/*****************************************************************************/
1542 3065
1543struct ev_once 3066struct ev_once
1544{ 3067{
1545 struct ev_io io; 3068 ev_io io;
1546 struct ev_timer to; 3069 ev_timer to;
1547 void (*cb)(int revents, void *arg); 3070 void (*cb)(int revents, void *arg);
1548 void *arg; 3071 void *arg;
1549}; 3072};
1550 3073
1551static void 3074static void
1552once_cb (EV_P_ struct ev_once *once, int revents) 3075once_cb (EV_P_ struct ev_once *once, int revents)
1553{ 3076{
1554 void (*cb)(int revents, void *arg) = once->cb; 3077 void (*cb)(int revents, void *arg) = once->cb;
1555 void *arg = once->arg; 3078 void *arg = once->arg;
1556 3079
1557 ev_io_stop (EV_A_ &once->io); 3080 ev_io_stop (EV_A_ &once->io);
1558 ev_timer_stop (EV_A_ &once->to); 3081 ev_timer_stop (EV_A_ &once->to);
1559 ev_free (once); 3082 ev_free (once);
1560 3083
1561 cb (revents, arg); 3084 cb (revents, arg);
1562} 3085}
1563 3086
1564static void 3087static void
1565once_cb_io (EV_P_ struct ev_io *w, int revents) 3088once_cb_io (EV_P_ ev_io *w, int revents)
1566{ 3089{
1567 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3090 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3091
3092 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1568} 3093}
1569 3094
1570static void 3095static void
1571once_cb_to (EV_P_ struct ev_timer *w, int revents) 3096once_cb_to (EV_P_ ev_timer *w, int revents)
1572{ 3097{
1573 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3098 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3099
3100 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1574} 3101}
1575 3102
1576void 3103void
1577ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3104ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1578{ 3105{
1579 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3106 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1580 3107
1581 if (!once) 3108 if (expect_false (!once))
3109 {
1582 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3110 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1583 else 3111 return;
1584 { 3112 }
3113
1585 once->cb = cb; 3114 once->cb = cb;
1586 once->arg = arg; 3115 once->arg = arg;
1587 3116
1588 ev_init (&once->io, once_cb_io); 3117 ev_init (&once->io, once_cb_io);
1589 if (fd >= 0) 3118 if (fd >= 0)
1590 { 3119 {
1591 ev_io_set (&once->io, fd, events); 3120 ev_io_set (&once->io, fd, events);
1592 ev_io_start (EV_A_ &once->io); 3121 ev_io_start (EV_A_ &once->io);
1593 } 3122 }
1594 3123
1595 ev_init (&once->to, once_cb_to); 3124 ev_init (&once->to, once_cb_to);
1596 if (timeout >= 0.) 3125 if (timeout >= 0.)
1597 { 3126 {
1598 ev_timer_set (&once->to, timeout, 0.); 3127 ev_timer_set (&once->to, timeout, 0.);
1599 ev_timer_start (EV_A_ &once->to); 3128 ev_timer_start (EV_A_ &once->to);
1600 }
1601 } 3129 }
1602} 3130}
3131
3132#if EV_MULTIPLICITY
3133 #include "ev_wrap.h"
3134#endif
1603 3135
1604#ifdef __cplusplus 3136#ifdef __cplusplus
1605} 3137}
1606#endif 3138#endif
1607 3139

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