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Comparing libev/ev.c (file contents):
Revision 1.168 by root, Sat Dec 8 14:12:07 2007 UTC vs.
Revision 1.311 by root, Wed Jul 29 09:36:05 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
37# ifdef EV_CONFIG_H 46# ifdef EV_CONFIG_H
38# include EV_CONFIG_H 47# include EV_CONFIG_H
39# else 48# else
40# include "config.h" 49# include "config.h"
41# endif 50# endif
42 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# elif !defined(EV_USE_CLOCK_SYSCALL)
63# define EV_USE_CLOCK_SYSCALL 0
64# endif
65
43# if HAVE_CLOCK_GETTIME 66# if HAVE_CLOCK_GETTIME
44# ifndef EV_USE_MONOTONIC 67# ifndef EV_USE_MONOTONIC
45# define EV_USE_MONOTONIC 1 68# define EV_USE_MONOTONIC 1
46# endif 69# endif
47# ifndef EV_USE_REALTIME 70# ifndef EV_USE_REALTIME
48# define EV_USE_REALTIME 1 71# define EV_USE_REALTIME 0
49# endif 72# endif
50# else 73# else
51# ifndef EV_USE_MONOTONIC 74# ifndef EV_USE_MONOTONIC
52# define EV_USE_MONOTONIC 0 75# define EV_USE_MONOTONIC 0
53# endif 76# endif
54# ifndef EV_USE_REALTIME 77# ifndef EV_USE_REALTIME
55# define EV_USE_REALTIME 0 78# define EV_USE_REALTIME 0
79# endif
80# endif
81
82# ifndef EV_USE_NANOSLEEP
83# if HAVE_NANOSLEEP
84# define EV_USE_NANOSLEEP 1
85# else
86# define EV_USE_NANOSLEEP 0
56# endif 87# endif
57# endif 88# endif
58 89
59# ifndef EV_USE_SELECT 90# ifndef EV_USE_SELECT
60# if HAVE_SELECT && HAVE_SYS_SELECT_H 91# if HAVE_SELECT && HAVE_SYS_SELECT_H
… …
102# else 133# else
103# define EV_USE_INOTIFY 0 134# define EV_USE_INOTIFY 0
104# endif 135# endif
105# endif 136# endif
106 137
138# ifndef EV_USE_SIGNALFD
139# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
140# define EV_USE_SIGNALFD 1
141# else
142# define EV_USE_SIGNALFD 0
143# endif
144# endif
145
146# ifndef EV_USE_EVENTFD
147# if HAVE_EVENTFD
148# define EV_USE_EVENTFD 1
149# else
150# define EV_USE_EVENTFD 0
151# endif
152# endif
153
107#endif 154#endif
108 155
109#include <math.h> 156#include <math.h>
110#include <stdlib.h> 157#include <stdlib.h>
111#include <fcntl.h> 158#include <fcntl.h>
… …
129#ifndef _WIN32 176#ifndef _WIN32
130# include <sys/time.h> 177# include <sys/time.h>
131# include <sys/wait.h> 178# include <sys/wait.h>
132# include <unistd.h> 179# include <unistd.h>
133#else 180#else
181# include <io.h>
134# define WIN32_LEAN_AND_MEAN 182# define WIN32_LEAN_AND_MEAN
135# include <windows.h> 183# include <windows.h>
136# ifndef EV_SELECT_IS_WINSOCKET 184# ifndef EV_SELECT_IS_WINSOCKET
137# define EV_SELECT_IS_WINSOCKET 1 185# define EV_SELECT_IS_WINSOCKET 1
138# endif 186# endif
139#endif 187#endif
140 188
141/**/ 189/* this block tries to deduce configuration from header-defined symbols and defaults */
190
191/* try to deduce the maximum number of signals on this platform */
192#if defined (EV_NSIG)
193/* use what's provided */
194#elif defined (NSIG)
195# define EV_NSIG (NSIG)
196#elif defined(_NSIG)
197# define EV_NSIG (_NSIG)
198#elif defined (SIGMAX)
199# define EV_NSIG (SIGMAX+1)
200#elif defined (SIG_MAX)
201# define EV_NSIG (SIG_MAX+1)
202#elif defined (_SIG_MAX)
203# define EV_NSIG (_SIG_MAX+1)
204#elif defined (MAXSIG)
205# define EV_NSIG (MAXSIG+1)
206#elif defined (MAX_SIG)
207# define EV_NSIG (MAX_SIG+1)
208#elif defined (SIGARRAYSIZE)
209# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */
210#elif defined (_sys_nsig)
211# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
212#else
213# error "unable to find value for NSIG, please report"
214/* to make it compile regardless, just remove the above line */
215# define EV_NSIG 65
216#endif
217
218#ifndef EV_USE_CLOCK_SYSCALL
219# if __linux && __GLIBC__ >= 2
220# define EV_USE_CLOCK_SYSCALL 1
221# else
222# define EV_USE_CLOCK_SYSCALL 0
223# endif
224#endif
142 225
143#ifndef EV_USE_MONOTONIC 226#ifndef EV_USE_MONOTONIC
227# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
228# define EV_USE_MONOTONIC 1
229# else
144# define EV_USE_MONOTONIC 0 230# define EV_USE_MONOTONIC 0
231# endif
145#endif 232#endif
146 233
147#ifndef EV_USE_REALTIME 234#ifndef EV_USE_REALTIME
148# define EV_USE_REALTIME 0 235# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
236#endif
237
238#ifndef EV_USE_NANOSLEEP
239# if _POSIX_C_SOURCE >= 199309L
240# define EV_USE_NANOSLEEP 1
241# else
242# define EV_USE_NANOSLEEP 0
243# endif
149#endif 244#endif
150 245
151#ifndef EV_USE_SELECT 246#ifndef EV_USE_SELECT
152# define EV_USE_SELECT 1 247# define EV_USE_SELECT 1
153#endif 248#endif
… …
159# define EV_USE_POLL 1 254# define EV_USE_POLL 1
160# endif 255# endif
161#endif 256#endif
162 257
163#ifndef EV_USE_EPOLL 258#ifndef EV_USE_EPOLL
259# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
260# define EV_USE_EPOLL 1
261# else
164# define EV_USE_EPOLL 0 262# define EV_USE_EPOLL 0
263# endif
165#endif 264#endif
166 265
167#ifndef EV_USE_KQUEUE 266#ifndef EV_USE_KQUEUE
168# define EV_USE_KQUEUE 0 267# define EV_USE_KQUEUE 0
169#endif 268#endif
… …
171#ifndef EV_USE_PORT 270#ifndef EV_USE_PORT
172# define EV_USE_PORT 0 271# define EV_USE_PORT 0
173#endif 272#endif
174 273
175#ifndef EV_USE_INOTIFY 274#ifndef EV_USE_INOTIFY
275# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
276# define EV_USE_INOTIFY 1
277# else
176# define EV_USE_INOTIFY 0 278# define EV_USE_INOTIFY 0
279# endif
177#endif 280#endif
178 281
179#ifndef EV_PID_HASHSIZE 282#ifndef EV_PID_HASHSIZE
180# if EV_MINIMAL 283# if EV_MINIMAL
181# define EV_PID_HASHSIZE 1 284# define EV_PID_HASHSIZE 1
… …
190# else 293# else
191# define EV_INOTIFY_HASHSIZE 16 294# define EV_INOTIFY_HASHSIZE 16
192# endif 295# endif
193#endif 296#endif
194 297
195/**/ 298#ifndef EV_USE_EVENTFD
299# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
300# define EV_USE_EVENTFD 1
301# else
302# define EV_USE_EVENTFD 0
303# endif
304#endif
305
306#ifndef EV_USE_SIGNALFD
307# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 9))
308# define EV_USE_SIGNALFD 1
309# else
310# define EV_USE_SIGNALFD 0
311# endif
312#endif
313
314#if 0 /* debugging */
315# define EV_VERIFY 3
316# define EV_USE_4HEAP 1
317# define EV_HEAP_CACHE_AT 1
318#endif
319
320#ifndef EV_VERIFY
321# define EV_VERIFY !EV_MINIMAL
322#endif
323
324#ifndef EV_USE_4HEAP
325# define EV_USE_4HEAP !EV_MINIMAL
326#endif
327
328#ifndef EV_HEAP_CACHE_AT
329# define EV_HEAP_CACHE_AT !EV_MINIMAL
330#endif
331
332/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
333/* which makes programs even slower. might work on other unices, too. */
334#if EV_USE_CLOCK_SYSCALL
335# include <syscall.h>
336# ifdef SYS_clock_gettime
337# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
338# undef EV_USE_MONOTONIC
339# define EV_USE_MONOTONIC 1
340# else
341# undef EV_USE_CLOCK_SYSCALL
342# define EV_USE_CLOCK_SYSCALL 0
343# endif
344#endif
345
346/* this block fixes any misconfiguration where we know we run into trouble otherwise */
196 347
197#ifndef CLOCK_MONOTONIC 348#ifndef CLOCK_MONOTONIC
198# undef EV_USE_MONOTONIC 349# undef EV_USE_MONOTONIC
199# define EV_USE_MONOTONIC 0 350# define EV_USE_MONOTONIC 0
200#endif 351#endif
… …
202#ifndef CLOCK_REALTIME 353#ifndef CLOCK_REALTIME
203# undef EV_USE_REALTIME 354# undef EV_USE_REALTIME
204# define EV_USE_REALTIME 0 355# define EV_USE_REALTIME 0
205#endif 356#endif
206 357
358#if !EV_STAT_ENABLE
359# undef EV_USE_INOTIFY
360# define EV_USE_INOTIFY 0
361#endif
362
363#if !EV_USE_NANOSLEEP
364# ifndef _WIN32
365# include <sys/select.h>
366# endif
367#endif
368
369#if EV_USE_INOTIFY
370# include <sys/utsname.h>
371# include <sys/statfs.h>
372# include <sys/inotify.h>
373/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
374# ifndef IN_DONT_FOLLOW
375# undef EV_USE_INOTIFY
376# define EV_USE_INOTIFY 0
377# endif
378#endif
379
207#if EV_SELECT_IS_WINSOCKET 380#if EV_SELECT_IS_WINSOCKET
208# include <winsock.h> 381# include <winsock.h>
209#endif 382#endif
210 383
211#if !EV_STAT_ENABLE 384#if EV_USE_EVENTFD
212# define EV_USE_INOTIFY 0 385/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
386# include <stdint.h>
387# ifndef EFD_NONBLOCK
388# define EFD_NONBLOCK O_NONBLOCK
213#endif 389# endif
390# ifndef EFD_CLOEXEC
391# ifdef O_CLOEXEC
392# define EFD_CLOEXEC O_CLOEXEC
393# else
394# define EFD_CLOEXEC 02000000
395# endif
396# endif
397# ifdef __cplusplus
398extern "C" {
399# endif
400int eventfd (unsigned int initval, int flags);
401# ifdef __cplusplus
402}
403# endif
404#endif
214 405
215#if EV_USE_INOTIFY 406#if EV_USE_SIGNALFD
216# include <sys/inotify.h> 407# include <sys/signalfd.h>
217#endif 408#endif
218 409
219/**/ 410/**/
411
412#if EV_VERIFY >= 3
413# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
414#else
415# define EV_FREQUENT_CHECK do { } while (0)
416#endif
417
418/*
419 * This is used to avoid floating point rounding problems.
420 * It is added to ev_rt_now when scheduling periodics
421 * to ensure progress, time-wise, even when rounding
422 * errors are against us.
423 * This value is good at least till the year 4000.
424 * Better solutions welcome.
425 */
426#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
220 427
221#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 428#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
222#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 429#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
223/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */ 430/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
224 431
225#if __GNUC__ >= 3 432#if __GNUC__ >= 4
226# define expect(expr,value) __builtin_expect ((expr),(value)) 433# define expect(expr,value) __builtin_expect ((expr),(value))
227# define inline_size static inline /* inline for codesize */
228# if EV_MINIMAL
229# define noinline __attribute__ ((noinline)) 434# define noinline __attribute__ ((noinline))
230# define inline_speed static noinline
231# else
232# define noinline
233# define inline_speed static inline
234# endif
235#else 435#else
236# define expect(expr,value) (expr) 436# define expect(expr,value) (expr)
237# define inline_speed static
238# define inline_size static
239# define noinline 437# define noinline
438# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
439# define inline
440# endif
240#endif 441#endif
241 442
242#define expect_false(expr) expect ((expr) != 0, 0) 443#define expect_false(expr) expect ((expr) != 0, 0)
243#define expect_true(expr) expect ((expr) != 0, 1) 444#define expect_true(expr) expect ((expr) != 0, 1)
445#define inline_size static inline
244 446
447#if EV_MINIMAL
448# define inline_speed static noinline
449#else
450# define inline_speed static inline
451#endif
452
245#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 453#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
454
455#if EV_MINPRI == EV_MAXPRI
456# define ABSPRI(w) (((W)w), 0)
457#else
246#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 458# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
459#endif
247 460
248#define EMPTY /* required for microsofts broken pseudo-c compiler */ 461#define EMPTY /* required for microsofts broken pseudo-c compiler */
249#define EMPTY2(a,b) /* used to suppress some warnings */ 462#define EMPTY2(a,b) /* used to suppress some warnings */
250 463
251typedef ev_watcher *W; 464typedef ev_watcher *W;
252typedef ev_watcher_list *WL; 465typedef ev_watcher_list *WL;
253typedef ev_watcher_time *WT; 466typedef ev_watcher_time *WT;
254 467
468#define ev_active(w) ((W)(w))->active
469#define ev_at(w) ((WT)(w))->at
470
471#if EV_USE_REALTIME
472/* sig_atomic_t is used to avoid per-thread variables or locking but still */
473/* giving it a reasonably high chance of working on typical architetcures */
474static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
475#endif
476
477#if EV_USE_MONOTONIC
255static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 478static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
479#endif
256 480
257#ifdef _WIN32 481#ifdef _WIN32
258# include "ev_win32.c" 482# include "ev_win32.c"
259#endif 483#endif
260 484
… …
267{ 491{
268 syserr_cb = cb; 492 syserr_cb = cb;
269} 493}
270 494
271static void noinline 495static void noinline
272syserr (const char *msg) 496ev_syserr (const char *msg)
273{ 497{
274 if (!msg) 498 if (!msg)
275 msg = "(libev) system error"; 499 msg = "(libev) system error";
276 500
277 if (syserr_cb) 501 if (syserr_cb)
… …
281 perror (msg); 505 perror (msg);
282 abort (); 506 abort ();
283 } 507 }
284} 508}
285 509
510static void *
511ev_realloc_emul (void *ptr, long size)
512{
513 /* some systems, notably openbsd and darwin, fail to properly
514 * implement realloc (x, 0) (as required by both ansi c-98 and
515 * the single unix specification, so work around them here.
516 */
517
518 if (size)
519 return realloc (ptr, size);
520
521 free (ptr);
522 return 0;
523}
524
286static void *(*alloc)(void *ptr, long size); 525static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
287 526
288void 527void
289ev_set_allocator (void *(*cb)(void *ptr, long size)) 528ev_set_allocator (void *(*cb)(void *ptr, long size))
290{ 529{
291 alloc = cb; 530 alloc = cb;
292} 531}
293 532
294inline_speed void * 533inline_speed void *
295ev_realloc (void *ptr, long size) 534ev_realloc (void *ptr, long size)
296{ 535{
297 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 536 ptr = alloc (ptr, size);
298 537
299 if (!ptr && size) 538 if (!ptr && size)
300 { 539 {
301 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 540 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
302 abort (); 541 abort ();
… …
308#define ev_malloc(size) ev_realloc (0, (size)) 547#define ev_malloc(size) ev_realloc (0, (size))
309#define ev_free(ptr) ev_realloc ((ptr), 0) 548#define ev_free(ptr) ev_realloc ((ptr), 0)
310 549
311/*****************************************************************************/ 550/*****************************************************************************/
312 551
552/* set in reify when reification needed */
553#define EV_ANFD_REIFY 1
554
555/* file descriptor info structure */
313typedef struct 556typedef struct
314{ 557{
315 WL head; 558 WL head;
316 unsigned char events; 559 unsigned char events; /* the events watched for */
560 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
561 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
317 unsigned char reify; 562 unsigned char unused;
563#if EV_USE_EPOLL
564 unsigned int egen; /* generation counter to counter epoll bugs */
565#endif
318#if EV_SELECT_IS_WINSOCKET 566#if EV_SELECT_IS_WINSOCKET
319 SOCKET handle; 567 SOCKET handle;
320#endif 568#endif
321} ANFD; 569} ANFD;
322 570
571/* stores the pending event set for a given watcher */
323typedef struct 572typedef struct
324{ 573{
325 W w; 574 W w;
326 int events; 575 int events; /* the pending event set for the given watcher */
327} ANPENDING; 576} ANPENDING;
328 577
329#if EV_USE_INOTIFY 578#if EV_USE_INOTIFY
579/* hash table entry per inotify-id */
330typedef struct 580typedef struct
331{ 581{
332 WL head; 582 WL head;
333} ANFS; 583} ANFS;
584#endif
585
586/* Heap Entry */
587#if EV_HEAP_CACHE_AT
588 /* a heap element */
589 typedef struct {
590 ev_tstamp at;
591 WT w;
592 } ANHE;
593
594 #define ANHE_w(he) (he).w /* access watcher, read-write */
595 #define ANHE_at(he) (he).at /* access cached at, read-only */
596 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
597#else
598 /* a heap element */
599 typedef WT ANHE;
600
601 #define ANHE_w(he) (he)
602 #define ANHE_at(he) (he)->at
603 #define ANHE_at_cache(he)
334#endif 604#endif
335 605
336#if EV_MULTIPLICITY 606#if EV_MULTIPLICITY
337 607
338 struct ev_loop 608 struct ev_loop
… …
357 627
358 static int ev_default_loop_ptr; 628 static int ev_default_loop_ptr;
359 629
360#endif 630#endif
361 631
632#if EV_MINIMAL < 2
633# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
634# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
635# define EV_INVOKE_PENDING invoke_cb (EV_A)
636#else
637# define EV_RELEASE_CB (void)0
638# define EV_ACQUIRE_CB (void)0
639# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
640#endif
641
642#define EVUNLOOP_RECURSE 0x80
643
362/*****************************************************************************/ 644/*****************************************************************************/
363 645
646#ifndef EV_HAVE_EV_TIME
364ev_tstamp 647ev_tstamp
365ev_time (void) 648ev_time (void)
366{ 649{
367#if EV_USE_REALTIME 650#if EV_USE_REALTIME
651 if (expect_true (have_realtime))
652 {
368 struct timespec ts; 653 struct timespec ts;
369 clock_gettime (CLOCK_REALTIME, &ts); 654 clock_gettime (CLOCK_REALTIME, &ts);
370 return ts.tv_sec + ts.tv_nsec * 1e-9; 655 return ts.tv_sec + ts.tv_nsec * 1e-9;
371#else 656 }
657#endif
658
372 struct timeval tv; 659 struct timeval tv;
373 gettimeofday (&tv, 0); 660 gettimeofday (&tv, 0);
374 return tv.tv_sec + tv.tv_usec * 1e-6; 661 return tv.tv_sec + tv.tv_usec * 1e-6;
375#endif
376} 662}
663#endif
377 664
378ev_tstamp inline_size 665inline_size ev_tstamp
379get_clock (void) 666get_clock (void)
380{ 667{
381#if EV_USE_MONOTONIC 668#if EV_USE_MONOTONIC
382 if (expect_true (have_monotonic)) 669 if (expect_true (have_monotonic))
383 { 670 {
… …
396{ 683{
397 return ev_rt_now; 684 return ev_rt_now;
398} 685}
399#endif 686#endif
400 687
401int inline_size 688void
689ev_sleep (ev_tstamp delay)
690{
691 if (delay > 0.)
692 {
693#if EV_USE_NANOSLEEP
694 struct timespec ts;
695
696 ts.tv_sec = (time_t)delay;
697 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
698
699 nanosleep (&ts, 0);
700#elif defined(_WIN32)
701 Sleep ((unsigned long)(delay * 1e3));
702#else
703 struct timeval tv;
704
705 tv.tv_sec = (time_t)delay;
706 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
707
708 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
709 /* something not guaranteed by newer posix versions, but guaranteed */
710 /* by older ones */
711 select (0, 0, 0, 0, &tv);
712#endif
713 }
714}
715
716/*****************************************************************************/
717
718#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
719
720/* find a suitable new size for the given array, */
721/* hopefully by rounding to a ncie-to-malloc size */
722inline_size int
402array_nextsize (int elem, int cur, int cnt) 723array_nextsize (int elem, int cur, int cnt)
403{ 724{
404 int ncur = cur + 1; 725 int ncur = cur + 1;
405 726
406 do 727 do
407 ncur <<= 1; 728 ncur <<= 1;
408 while (cnt > ncur); 729 while (cnt > ncur);
409 730
410 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 731 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
411 if (elem * ncur > 4096) 732 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
412 { 733 {
413 ncur *= elem; 734 ncur *= elem;
414 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 735 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
415 ncur = ncur - sizeof (void *) * 4; 736 ncur = ncur - sizeof (void *) * 4;
416 ncur /= elem; 737 ncur /= elem;
417 } 738 }
418 739
419 return ncur; 740 return ncur;
420} 741}
421 742
422inline_speed void * 743static noinline void *
423array_realloc (int elem, void *base, int *cur, int cnt) 744array_realloc (int elem, void *base, int *cur, int cnt)
424{ 745{
425 *cur = array_nextsize (elem, *cur, cnt); 746 *cur = array_nextsize (elem, *cur, cnt);
426 return ev_realloc (base, elem * *cur); 747 return ev_realloc (base, elem * *cur);
427} 748}
749
750#define array_init_zero(base,count) \
751 memset ((void *)(base), 0, sizeof (*(base)) * (count))
428 752
429#define array_needsize(type,base,cur,cnt,init) \ 753#define array_needsize(type,base,cur,cnt,init) \
430 if (expect_false ((cnt) > (cur))) \ 754 if (expect_false ((cnt) > (cur))) \
431 { \ 755 { \
432 int ocur_ = (cur); \ 756 int ocur_ = (cur); \
… …
444 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 768 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
445 } 769 }
446#endif 770#endif
447 771
448#define array_free(stem, idx) \ 772#define array_free(stem, idx) \
449 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 773 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
450 774
451/*****************************************************************************/ 775/*****************************************************************************/
776
777/* dummy callback for pending events */
778static void noinline
779pendingcb (EV_P_ ev_prepare *w, int revents)
780{
781}
452 782
453void noinline 783void noinline
454ev_feed_event (EV_P_ void *w, int revents) 784ev_feed_event (EV_P_ void *w, int revents)
455{ 785{
456 W w_ = (W)w; 786 W w_ = (W)w;
787 int pri = ABSPRI (w_);
457 788
458 if (expect_false (w_->pending)) 789 if (expect_false (w_->pending))
790 pendings [pri][w_->pending - 1].events |= revents;
791 else
459 { 792 {
793 w_->pending = ++pendingcnt [pri];
794 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
795 pendings [pri][w_->pending - 1].w = w_;
460 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 796 pendings [pri][w_->pending - 1].events = revents;
461 return;
462 } 797 }
463
464 w_->pending = ++pendingcnt [ABSPRI (w_)];
465 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
466 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
467 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
468} 798}
469 799
470void inline_size 800inline_speed void
801feed_reverse (EV_P_ W w)
802{
803 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
804 rfeeds [rfeedcnt++] = w;
805}
806
807inline_size void
808feed_reverse_done (EV_P_ int revents)
809{
810 do
811 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
812 while (rfeedcnt);
813}
814
815inline_speed void
471queue_events (EV_P_ W *events, int eventcnt, int type) 816queue_events (EV_P_ W *events, int eventcnt, int type)
472{ 817{
473 int i; 818 int i;
474 819
475 for (i = 0; i < eventcnt; ++i) 820 for (i = 0; i < eventcnt; ++i)
476 ev_feed_event (EV_A_ events [i], type); 821 ev_feed_event (EV_A_ events [i], type);
477} 822}
478 823
479/*****************************************************************************/ 824/*****************************************************************************/
480 825
481void inline_size 826inline_speed void
482anfds_init (ANFD *base, int count)
483{
484 while (count--)
485 {
486 base->head = 0;
487 base->events = EV_NONE;
488 base->reify = 0;
489
490 ++base;
491 }
492}
493
494void inline_speed
495fd_event (EV_P_ int fd, int revents) 827fd_event_nc (EV_P_ int fd, int revents)
496{ 828{
497 ANFD *anfd = anfds + fd; 829 ANFD *anfd = anfds + fd;
498 ev_io *w; 830 ev_io *w;
499 831
500 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 832 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
504 if (ev) 836 if (ev)
505 ev_feed_event (EV_A_ (W)w, ev); 837 ev_feed_event (EV_A_ (W)w, ev);
506 } 838 }
507} 839}
508 840
841/* do not submit kernel events for fds that have reify set */
842/* because that means they changed while we were polling for new events */
843inline_speed void
844fd_event (EV_P_ int fd, int revents)
845{
846 ANFD *anfd = anfds + fd;
847
848 if (expect_true (!anfd->reify))
849 fd_event_nc (EV_A_ fd, revents);
850}
851
509void 852void
510ev_feed_fd_event (EV_P_ int fd, int revents) 853ev_feed_fd_event (EV_P_ int fd, int revents)
511{ 854{
512 if (fd >= 0 && fd < anfdmax) 855 if (fd >= 0 && fd < anfdmax)
513 fd_event (EV_A_ fd, revents); 856 fd_event_nc (EV_A_ fd, revents);
514} 857}
515 858
516void inline_size 859/* make sure the external fd watch events are in-sync */
860/* with the kernel/libev internal state */
861inline_size void
517fd_reify (EV_P) 862fd_reify (EV_P)
518{ 863{
519 int i; 864 int i;
520 865
521 for (i = 0; i < fdchangecnt; ++i) 866 for (i = 0; i < fdchangecnt; ++i)
522 { 867 {
523 int fd = fdchanges [i]; 868 int fd = fdchanges [i];
524 ANFD *anfd = anfds + fd; 869 ANFD *anfd = anfds + fd;
525 ev_io *w; 870 ev_io *w;
526 871
527 int events = 0; 872 unsigned char events = 0;
528 873
529 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 874 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
530 events |= w->events; 875 events |= (unsigned char)w->events;
531 876
532#if EV_SELECT_IS_WINSOCKET 877#if EV_SELECT_IS_WINSOCKET
533 if (events) 878 if (events)
534 { 879 {
535 unsigned long argp; 880 unsigned long arg;
881 #ifdef EV_FD_TO_WIN32_HANDLE
882 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
883 #else
536 anfd->handle = _get_osfhandle (fd); 884 anfd->handle = _get_osfhandle (fd);
885 #endif
537 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 886 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
538 } 887 }
539#endif 888#endif
540 889
890 {
891 unsigned char o_events = anfd->events;
892 unsigned char o_reify = anfd->reify;
893
541 anfd->reify = 0; 894 anfd->reify = 0;
542
543 backend_modify (EV_A_ fd, anfd->events, events);
544 anfd->events = events; 895 anfd->events = events;
896
897 if (o_events != events || o_reify & EV__IOFDSET)
898 backend_modify (EV_A_ fd, o_events, events);
899 }
545 } 900 }
546 901
547 fdchangecnt = 0; 902 fdchangecnt = 0;
548} 903}
549 904
550void inline_size 905/* something about the given fd changed */
906inline_size void
551fd_change (EV_P_ int fd) 907fd_change (EV_P_ int fd, int flags)
552{ 908{
553 if (expect_false (anfds [fd].reify)) 909 unsigned char reify = anfds [fd].reify;
554 return;
555
556 anfds [fd].reify = 1; 910 anfds [fd].reify |= flags;
557 911
912 if (expect_true (!reify))
913 {
558 ++fdchangecnt; 914 ++fdchangecnt;
559 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 915 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
560 fdchanges [fdchangecnt - 1] = fd; 916 fdchanges [fdchangecnt - 1] = fd;
917 }
561} 918}
562 919
563void inline_speed 920/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
921inline_speed void
564fd_kill (EV_P_ int fd) 922fd_kill (EV_P_ int fd)
565{ 923{
566 ev_io *w; 924 ev_io *w;
567 925
568 while ((w = (ev_io *)anfds [fd].head)) 926 while ((w = (ev_io *)anfds [fd].head))
… …
570 ev_io_stop (EV_A_ w); 928 ev_io_stop (EV_A_ w);
571 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 929 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
572 } 930 }
573} 931}
574 932
575int inline_size 933/* check whether the given fd is atcually valid, for error recovery */
934inline_size int
576fd_valid (int fd) 935fd_valid (int fd)
577{ 936{
578#ifdef _WIN32 937#ifdef _WIN32
579 return _get_osfhandle (fd) != -1; 938 return _get_osfhandle (fd) != -1;
580#else 939#else
… …
588{ 947{
589 int fd; 948 int fd;
590 949
591 for (fd = 0; fd < anfdmax; ++fd) 950 for (fd = 0; fd < anfdmax; ++fd)
592 if (anfds [fd].events) 951 if (anfds [fd].events)
593 if (!fd_valid (fd) == -1 && errno == EBADF) 952 if (!fd_valid (fd) && errno == EBADF)
594 fd_kill (EV_A_ fd); 953 fd_kill (EV_A_ fd);
595} 954}
596 955
597/* called on ENOMEM in select/poll to kill some fds and retry */ 956/* called on ENOMEM in select/poll to kill some fds and retry */
598static void noinline 957static void noinline
… …
602 961
603 for (fd = anfdmax; fd--; ) 962 for (fd = anfdmax; fd--; )
604 if (anfds [fd].events) 963 if (anfds [fd].events)
605 { 964 {
606 fd_kill (EV_A_ fd); 965 fd_kill (EV_A_ fd);
607 return; 966 break;
608 } 967 }
609} 968}
610 969
611/* usually called after fork if backend needs to re-arm all fds from scratch */ 970/* usually called after fork if backend needs to re-arm all fds from scratch */
612static void noinline 971static void noinline
… …
616 975
617 for (fd = 0; fd < anfdmax; ++fd) 976 for (fd = 0; fd < anfdmax; ++fd)
618 if (anfds [fd].events) 977 if (anfds [fd].events)
619 { 978 {
620 anfds [fd].events = 0; 979 anfds [fd].events = 0;
621 fd_change (EV_A_ fd); 980 anfds [fd].emask = 0;
981 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
622 } 982 }
623} 983}
624 984
625/*****************************************************************************/ 985/*****************************************************************************/
626 986
627void inline_speed 987/*
628upheap (WT *heap, int k) 988 * the heap functions want a real array index. array index 0 uis guaranteed to not
629{ 989 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
630 WT w = heap [k]; 990 * the branching factor of the d-tree.
991 */
631 992
632 while (k && heap [k >> 1]->at > w->at) 993/*
633 { 994 * at the moment we allow libev the luxury of two heaps,
634 heap [k] = heap [k >> 1]; 995 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
635 ((W)heap [k])->active = k + 1; 996 * which is more cache-efficient.
636 k >>= 1; 997 * the difference is about 5% with 50000+ watchers.
637 } 998 */
999#if EV_USE_4HEAP
638 1000
639 heap [k] = w; 1001#define DHEAP 4
640 ((W)heap [k])->active = k + 1; 1002#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1003#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1004#define UPHEAP_DONE(p,k) ((p) == (k))
641 1005
642} 1006/* away from the root */
643 1007inline_speed void
644void inline_speed
645downheap (WT *heap, int N, int k) 1008downheap (ANHE *heap, int N, int k)
646{ 1009{
647 WT w = heap [k]; 1010 ANHE he = heap [k];
1011 ANHE *E = heap + N + HEAP0;
648 1012
649 while (k < (N >> 1)) 1013 for (;;)
650 { 1014 {
651 int j = k << 1; 1015 ev_tstamp minat;
1016 ANHE *minpos;
1017 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
652 1018
653 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 1019 /* find minimum child */
1020 if (expect_true (pos + DHEAP - 1 < E))
654 ++j; 1021 {
655 1022 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
656 if (w->at <= heap [j]->at) 1023 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1024 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1025 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1026 }
1027 else if (pos < E)
1028 {
1029 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1030 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1031 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1032 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1033 }
1034 else
657 break; 1035 break;
658 1036
1037 if (ANHE_at (he) <= minat)
1038 break;
1039
1040 heap [k] = *minpos;
1041 ev_active (ANHE_w (*minpos)) = k;
1042
1043 k = minpos - heap;
1044 }
1045
1046 heap [k] = he;
1047 ev_active (ANHE_w (he)) = k;
1048}
1049
1050#else /* 4HEAP */
1051
1052#define HEAP0 1
1053#define HPARENT(k) ((k) >> 1)
1054#define UPHEAP_DONE(p,k) (!(p))
1055
1056/* away from the root */
1057inline_speed void
1058downheap (ANHE *heap, int N, int k)
1059{
1060 ANHE he = heap [k];
1061
1062 for (;;)
1063 {
1064 int c = k << 1;
1065
1066 if (c >= N + HEAP0)
1067 break;
1068
1069 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1070 ? 1 : 0;
1071
1072 if (ANHE_at (he) <= ANHE_at (heap [c]))
1073 break;
1074
659 heap [k] = heap [j]; 1075 heap [k] = heap [c];
660 ((W)heap [k])->active = k + 1; 1076 ev_active (ANHE_w (heap [k])) = k;
1077
661 k = j; 1078 k = c;
662 } 1079 }
663 1080
664 heap [k] = w; 1081 heap [k] = he;
665 ((W)heap [k])->active = k + 1; 1082 ev_active (ANHE_w (he)) = k;
666} 1083}
1084#endif
667 1085
668void inline_size 1086/* towards the root */
1087inline_speed void
1088upheap (ANHE *heap, int k)
1089{
1090 ANHE he = heap [k];
1091
1092 for (;;)
1093 {
1094 int p = HPARENT (k);
1095
1096 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1097 break;
1098
1099 heap [k] = heap [p];
1100 ev_active (ANHE_w (heap [k])) = k;
1101 k = p;
1102 }
1103
1104 heap [k] = he;
1105 ev_active (ANHE_w (he)) = k;
1106}
1107
1108/* move an element suitably so it is in a correct place */
1109inline_size void
669adjustheap (WT *heap, int N, int k) 1110adjustheap (ANHE *heap, int N, int k)
670{ 1111{
1112 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
671 upheap (heap, k); 1113 upheap (heap, k);
1114 else
672 downheap (heap, N, k); 1115 downheap (heap, N, k);
1116}
1117
1118/* rebuild the heap: this function is used only once and executed rarely */
1119inline_size void
1120reheap (ANHE *heap, int N)
1121{
1122 int i;
1123
1124 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1125 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1126 for (i = 0; i < N; ++i)
1127 upheap (heap, i + HEAP0);
673} 1128}
674 1129
675/*****************************************************************************/ 1130/*****************************************************************************/
676 1131
1132/* associate signal watchers to a signal signal */
677typedef struct 1133typedef struct
678{ 1134{
1135 EV_ATOMIC_T pending;
1136#if EV_MULTIPLICITY
1137 EV_P;
1138#endif
679 WL head; 1139 WL head;
680 sig_atomic_t volatile gotsig;
681} ANSIG; 1140} ANSIG;
682 1141
683static ANSIG *signals; 1142static ANSIG signals [EV_NSIG - 1];
684static int signalmax;
685 1143
686static int sigpipe [2]; 1144/*****************************************************************************/
687static sig_atomic_t volatile gotsig;
688static ev_io sigev;
689 1145
690void inline_size 1146/* used to prepare libev internal fd's */
691signals_init (ANSIG *base, int count) 1147/* this is not fork-safe */
692{ 1148inline_speed void
693 while (count--)
694 {
695 base->head = 0;
696 base->gotsig = 0;
697
698 ++base;
699 }
700}
701
702static void
703sighandler (int signum)
704{
705#if _WIN32
706 signal (signum, sighandler);
707#endif
708
709 signals [signum - 1].gotsig = 1;
710
711 if (!gotsig)
712 {
713 int old_errno = errno;
714 gotsig = 1;
715 write (sigpipe [1], &signum, 1);
716 errno = old_errno;
717 }
718}
719
720void noinline
721ev_feed_signal_event (EV_P_ int signum)
722{
723 WL w;
724
725#if EV_MULTIPLICITY
726 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
727#endif
728
729 --signum;
730
731 if (signum < 0 || signum >= signalmax)
732 return;
733
734 signals [signum].gotsig = 0;
735
736 for (w = signals [signum].head; w; w = w->next)
737 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
738}
739
740static void
741sigcb (EV_P_ ev_io *iow, int revents)
742{
743 int signum;
744
745 read (sigpipe [0], &revents, 1);
746 gotsig = 0;
747
748 for (signum = signalmax; signum--; )
749 if (signals [signum].gotsig)
750 ev_feed_signal_event (EV_A_ signum + 1);
751}
752
753void inline_size
754fd_intern (int fd) 1149fd_intern (int fd)
755{ 1150{
756#ifdef _WIN32 1151#ifdef _WIN32
757 int arg = 1; 1152 unsigned long arg = 1;
758 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1153 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
759#else 1154#else
760 fcntl (fd, F_SETFD, FD_CLOEXEC); 1155 fcntl (fd, F_SETFD, FD_CLOEXEC);
761 fcntl (fd, F_SETFL, O_NONBLOCK); 1156 fcntl (fd, F_SETFL, O_NONBLOCK);
762#endif 1157#endif
763} 1158}
764 1159
765static void noinline 1160static void noinline
766siginit (EV_P) 1161evpipe_init (EV_P)
767{ 1162{
1163 if (!ev_is_active (&pipe_w))
1164 {
1165#if EV_USE_EVENTFD
1166 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1167 if (evfd < 0 && errno == EINVAL)
1168 evfd = eventfd (0, 0);
1169
1170 if (evfd >= 0)
1171 {
1172 evpipe [0] = -1;
1173 fd_intern (evfd); /* doing it twice doesn't hurt */
1174 ev_io_set (&pipe_w, evfd, EV_READ);
1175 }
1176 else
1177#endif
1178 {
1179 while (pipe (evpipe))
1180 ev_syserr ("(libev) error creating signal/async pipe");
1181
768 fd_intern (sigpipe [0]); 1182 fd_intern (evpipe [0]);
769 fd_intern (sigpipe [1]); 1183 fd_intern (evpipe [1]);
1184 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1185 }
770 1186
771 ev_io_set (&sigev, sigpipe [0], EV_READ);
772 ev_io_start (EV_A_ &sigev); 1187 ev_io_start (EV_A_ &pipe_w);
773 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1188 ev_unref (EV_A); /* watcher should not keep loop alive */
1189 }
1190}
1191
1192inline_size void
1193evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1194{
1195 if (!*flag)
1196 {
1197 int old_errno = errno; /* save errno because write might clobber it */
1198
1199 *flag = 1;
1200
1201#if EV_USE_EVENTFD
1202 if (evfd >= 0)
1203 {
1204 uint64_t counter = 1;
1205 write (evfd, &counter, sizeof (uint64_t));
1206 }
1207 else
1208#endif
1209 write (evpipe [1], &old_errno, 1);
1210
1211 errno = old_errno;
1212 }
1213}
1214
1215/* called whenever the libev signal pipe */
1216/* got some events (signal, async) */
1217static void
1218pipecb (EV_P_ ev_io *iow, int revents)
1219{
1220 int i;
1221
1222#if EV_USE_EVENTFD
1223 if (evfd >= 0)
1224 {
1225 uint64_t counter;
1226 read (evfd, &counter, sizeof (uint64_t));
1227 }
1228 else
1229#endif
1230 {
1231 char dummy;
1232 read (evpipe [0], &dummy, 1);
1233 }
1234
1235 if (sig_pending)
1236 {
1237 sig_pending = 0;
1238
1239 for (i = EV_NSIG - 1; i--; )
1240 if (expect_false (signals [i].pending))
1241 ev_feed_signal_event (EV_A_ i + 1);
1242 }
1243
1244#if EV_ASYNC_ENABLE
1245 if (async_pending)
1246 {
1247 async_pending = 0;
1248
1249 for (i = asynccnt; i--; )
1250 if (asyncs [i]->sent)
1251 {
1252 asyncs [i]->sent = 0;
1253 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1254 }
1255 }
1256#endif
774} 1257}
775 1258
776/*****************************************************************************/ 1259/*****************************************************************************/
777 1260
1261static void
1262ev_sighandler (int signum)
1263{
1264#if EV_MULTIPLICITY
1265 EV_P = signals [signum - 1].loop;
1266#endif
1267
1268#if _WIN32
1269 signal (signum, ev_sighandler);
1270#endif
1271
1272 signals [signum - 1].pending = 1;
1273 evpipe_write (EV_A_ &sig_pending);
1274}
1275
1276void noinline
1277ev_feed_signal_event (EV_P_ int signum)
1278{
1279 WL w;
1280
1281 if (expect_false (signum <= 0 || signum > EV_NSIG))
1282 return;
1283
1284 --signum;
1285
1286#if EV_MULTIPLICITY
1287 /* it is permissible to try to feed a signal to the wrong loop */
1288 /* or, likely more useful, feeding a signal nobody is waiting for */
1289
1290 if (expect_false (signals [signum].loop != EV_A))
1291 return;
1292#endif
1293
1294 signals [signum].pending = 0;
1295
1296 for (w = signals [signum].head; w; w = w->next)
1297 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1298}
1299
1300#if EV_USE_SIGNALFD
1301static void
1302sigfdcb (EV_P_ ev_io *iow, int revents)
1303{
1304 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1305
1306 for (;;)
1307 {
1308 ssize_t res = read (sigfd, si, sizeof (si));
1309
1310 /* not ISO-C, as res might be -1, but works with SuS */
1311 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1312 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1313
1314 if (res < (ssize_t)sizeof (si))
1315 break;
1316 }
1317}
1318#endif
1319
1320/*****************************************************************************/
1321
778static ev_child *childs [EV_PID_HASHSIZE]; 1322static WL childs [EV_PID_HASHSIZE];
779 1323
780#ifndef _WIN32 1324#ifndef _WIN32
781 1325
782static ev_signal childev; 1326static ev_signal childev;
783 1327
784void inline_speed 1328#ifndef WIFCONTINUED
1329# define WIFCONTINUED(status) 0
1330#endif
1331
1332/* handle a single child status event */
1333inline_speed void
785child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 1334child_reap (EV_P_ int chain, int pid, int status)
786{ 1335{
787 ev_child *w; 1336 ev_child *w;
1337 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
788 1338
789 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1339 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1340 {
790 if (w->pid == pid || !w->pid) 1341 if ((w->pid == pid || !w->pid)
1342 && (!traced || (w->flags & 1)))
791 { 1343 {
792 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 1344 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
793 w->rpid = pid; 1345 w->rpid = pid;
794 w->rstatus = status; 1346 w->rstatus = status;
795 ev_feed_event (EV_A_ (W)w, EV_CHILD); 1347 ev_feed_event (EV_A_ (W)w, EV_CHILD);
796 } 1348 }
1349 }
797} 1350}
798 1351
799#ifndef WCONTINUED 1352#ifndef WCONTINUED
800# define WCONTINUED 0 1353# define WCONTINUED 0
801#endif 1354#endif
802 1355
1356/* called on sigchld etc., calls waitpid */
803static void 1357static void
804childcb (EV_P_ ev_signal *sw, int revents) 1358childcb (EV_P_ ev_signal *sw, int revents)
805{ 1359{
806 int pid, status; 1360 int pid, status;
807 1361
… …
810 if (!WCONTINUED 1364 if (!WCONTINUED
811 || errno != EINVAL 1365 || errno != EINVAL
812 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 1366 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
813 return; 1367 return;
814 1368
815 /* make sure we are called again until all childs have been reaped */ 1369 /* make sure we are called again until all children have been reaped */
816 /* we need to do it this way so that the callback gets called before we continue */ 1370 /* we need to do it this way so that the callback gets called before we continue */
817 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1371 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
818 1372
819 child_reap (EV_A_ sw, pid, pid, status); 1373 child_reap (EV_A_ pid, pid, status);
820 if (EV_PID_HASHSIZE > 1) 1374 if (EV_PID_HASHSIZE > 1)
821 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1375 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
822} 1376}
823 1377
824#endif 1378#endif
825 1379
826/*****************************************************************************/ 1380/*****************************************************************************/
… …
888 /* kqueue is borked on everything but netbsd apparently */ 1442 /* kqueue is borked on everything but netbsd apparently */
889 /* it usually doesn't work correctly on anything but sockets and pipes */ 1443 /* it usually doesn't work correctly on anything but sockets and pipes */
890 flags &= ~EVBACKEND_KQUEUE; 1444 flags &= ~EVBACKEND_KQUEUE;
891#endif 1445#endif
892#ifdef __APPLE__ 1446#ifdef __APPLE__
893 // flags &= ~EVBACKEND_KQUEUE; for documentation 1447 /* only select works correctly on that "unix-certified" platform */
894 flags &= ~EVBACKEND_POLL; 1448 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1449 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
895#endif 1450#endif
896 1451
897 return flags; 1452 return flags;
898} 1453}
899 1454
900unsigned int 1455unsigned int
901ev_embeddable_backends (void) 1456ev_embeddable_backends (void)
902{ 1457{
903 return EVBACKEND_EPOLL 1458 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
904 | EVBACKEND_KQUEUE 1459
905 | EVBACKEND_PORT; 1460 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1461 /* please fix it and tell me how to detect the fix */
1462 flags &= ~EVBACKEND_EPOLL;
1463
1464 return flags;
906} 1465}
907 1466
908unsigned int 1467unsigned int
909ev_backend (EV_P) 1468ev_backend (EV_P)
910{ 1469{
911 return backend; 1470 return backend;
912} 1471}
913 1472
1473#if EV_MINIMAL < 2
914unsigned int 1474unsigned int
915ev_loop_count (EV_P) 1475ev_loop_count (EV_P)
916{ 1476{
917 return loop_count; 1477 return loop_count;
918} 1478}
919 1479
1480unsigned int
1481ev_loop_depth (EV_P)
1482{
1483 return loop_depth;
1484}
1485
1486void
1487ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1488{
1489 io_blocktime = interval;
1490}
1491
1492void
1493ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1494{
1495 timeout_blocktime = interval;
1496}
1497
1498void
1499ev_set_userdata (EV_P_ void *data)
1500{
1501 userdata = data;
1502}
1503
1504void *
1505ev_userdata (EV_P)
1506{
1507 return userdata;
1508}
1509
1510void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1511{
1512 invoke_cb = invoke_pending_cb;
1513}
1514
1515void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1516{
1517 release_cb = release;
1518 acquire_cb = acquire;
1519}
1520#endif
1521
1522/* initialise a loop structure, must be zero-initialised */
920static void noinline 1523static void noinline
921loop_init (EV_P_ unsigned int flags) 1524loop_init (EV_P_ unsigned int flags)
922{ 1525{
923 if (!backend) 1526 if (!backend)
924 { 1527 {
1528#if EV_USE_REALTIME
1529 if (!have_realtime)
1530 {
1531 struct timespec ts;
1532
1533 if (!clock_gettime (CLOCK_REALTIME, &ts))
1534 have_realtime = 1;
1535 }
1536#endif
1537
925#if EV_USE_MONOTONIC 1538#if EV_USE_MONOTONIC
1539 if (!have_monotonic)
926 { 1540 {
927 struct timespec ts; 1541 struct timespec ts;
1542
928 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1543 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
929 have_monotonic = 1; 1544 have_monotonic = 1;
930 } 1545 }
931#endif 1546#endif
932
933 ev_rt_now = ev_time ();
934 mn_now = get_clock ();
935 now_floor = mn_now;
936 rtmn_diff = ev_rt_now - mn_now;
937 1547
938 /* pid check not overridable via env */ 1548 /* pid check not overridable via env */
939#ifndef _WIN32 1549#ifndef _WIN32
940 if (flags & EVFLAG_FORKCHECK) 1550 if (flags & EVFLAG_FORKCHECK)
941 curpid = getpid (); 1551 curpid = getpid ();
… …
944 if (!(flags & EVFLAG_NOENV) 1554 if (!(flags & EVFLAG_NOENV)
945 && !enable_secure () 1555 && !enable_secure ()
946 && getenv ("LIBEV_FLAGS")) 1556 && getenv ("LIBEV_FLAGS"))
947 flags = atoi (getenv ("LIBEV_FLAGS")); 1557 flags = atoi (getenv ("LIBEV_FLAGS"));
948 1558
1559 ev_rt_now = ev_time ();
1560 mn_now = get_clock ();
1561 now_floor = mn_now;
1562 rtmn_diff = ev_rt_now - mn_now;
1563#if EV_MINIMAL < 2
1564 invoke_cb = ev_invoke_pending;
1565#endif
1566
1567 io_blocktime = 0.;
1568 timeout_blocktime = 0.;
1569 backend = 0;
1570 backend_fd = -1;
1571 sig_pending = 0;
1572#if EV_ASYNC_ENABLE
1573 async_pending = 0;
1574#endif
1575#if EV_USE_INOTIFY
1576 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1577#endif
1578#if EV_USE_SIGNALFD
1579 sigfd = flags & EVFLAG_NOSIGFD ? -1 : -2;
1580#endif
1581
949 if (!(flags & 0x0000ffffUL)) 1582 if (!(flags & 0x0000ffffU))
950 flags |= ev_recommended_backends (); 1583 flags |= ev_recommended_backends ();
951
952 backend = 0;
953 backend_fd = -1;
954#if EV_USE_INOTIFY
955 fs_fd = -2;
956#endif
957 1584
958#if EV_USE_PORT 1585#if EV_USE_PORT
959 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1586 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
960#endif 1587#endif
961#if EV_USE_KQUEUE 1588#if EV_USE_KQUEUE
… …
969#endif 1596#endif
970#if EV_USE_SELECT 1597#if EV_USE_SELECT
971 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1598 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
972#endif 1599#endif
973 1600
1601 ev_prepare_init (&pending_w, pendingcb);
1602
974 ev_init (&sigev, sigcb); 1603 ev_init (&pipe_w, pipecb);
975 ev_set_priority (&sigev, EV_MAXPRI); 1604 ev_set_priority (&pipe_w, EV_MAXPRI);
976 } 1605 }
977} 1606}
978 1607
1608/* free up a loop structure */
979static void noinline 1609static void noinline
980loop_destroy (EV_P) 1610loop_destroy (EV_P)
981{ 1611{
982 int i; 1612 int i;
1613
1614 if (ev_is_active (&pipe_w))
1615 {
1616 /*ev_ref (EV_A);*/
1617 /*ev_io_stop (EV_A_ &pipe_w);*/
1618
1619#if EV_USE_EVENTFD
1620 if (evfd >= 0)
1621 close (evfd);
1622#endif
1623
1624 if (evpipe [0] >= 0)
1625 {
1626 close (evpipe [0]);
1627 close (evpipe [1]);
1628 }
1629 }
1630
1631#if EV_USE_SIGNALFD
1632 if (ev_is_active (&sigfd_w))
1633 {
1634 /*ev_ref (EV_A);*/
1635 /*ev_io_stop (EV_A_ &sigfd_w);*/
1636
1637 close (sigfd);
1638 }
1639#endif
983 1640
984#if EV_USE_INOTIFY 1641#if EV_USE_INOTIFY
985 if (fs_fd >= 0) 1642 if (fs_fd >= 0)
986 close (fs_fd); 1643 close (fs_fd);
987#endif 1644#endif
… …
1011#if EV_IDLE_ENABLE 1668#if EV_IDLE_ENABLE
1012 array_free (idle, [i]); 1669 array_free (idle, [i]);
1013#endif 1670#endif
1014 } 1671 }
1015 1672
1673 ev_free (anfds); anfds = 0; anfdmax = 0;
1674
1016 /* have to use the microsoft-never-gets-it-right macro */ 1675 /* have to use the microsoft-never-gets-it-right macro */
1676 array_free (rfeed, EMPTY);
1017 array_free (fdchange, EMPTY); 1677 array_free (fdchange, EMPTY);
1018 array_free (timer, EMPTY); 1678 array_free (timer, EMPTY);
1019#if EV_PERIODIC_ENABLE 1679#if EV_PERIODIC_ENABLE
1020 array_free (periodic, EMPTY); 1680 array_free (periodic, EMPTY);
1021#endif 1681#endif
1682#if EV_FORK_ENABLE
1683 array_free (fork, EMPTY);
1684#endif
1022 array_free (prepare, EMPTY); 1685 array_free (prepare, EMPTY);
1023 array_free (check, EMPTY); 1686 array_free (check, EMPTY);
1687#if EV_ASYNC_ENABLE
1688 array_free (async, EMPTY);
1689#endif
1024 1690
1025 backend = 0; 1691 backend = 0;
1026} 1692}
1027 1693
1694#if EV_USE_INOTIFY
1028void inline_size infy_fork (EV_P); 1695inline_size void infy_fork (EV_P);
1696#endif
1029 1697
1030void inline_size 1698inline_size void
1031loop_fork (EV_P) 1699loop_fork (EV_P)
1032{ 1700{
1033#if EV_USE_PORT 1701#if EV_USE_PORT
1034 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 1702 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1035#endif 1703#endif
… …
1041#endif 1709#endif
1042#if EV_USE_INOTIFY 1710#if EV_USE_INOTIFY
1043 infy_fork (EV_A); 1711 infy_fork (EV_A);
1044#endif 1712#endif
1045 1713
1046 if (ev_is_active (&sigev)) 1714 if (ev_is_active (&pipe_w))
1047 { 1715 {
1048 /* default loop */ 1716 /* this "locks" the handlers against writing to the pipe */
1717 /* while we modify the fd vars */
1718 sig_pending = 1;
1719#if EV_ASYNC_ENABLE
1720 async_pending = 1;
1721#endif
1049 1722
1050 ev_ref (EV_A); 1723 ev_ref (EV_A);
1051 ev_io_stop (EV_A_ &sigev); 1724 ev_io_stop (EV_A_ &pipe_w);
1725
1726#if EV_USE_EVENTFD
1727 if (evfd >= 0)
1728 close (evfd);
1729#endif
1730
1731 if (evpipe [0] >= 0)
1732 {
1052 close (sigpipe [0]); 1733 close (evpipe [0]);
1053 close (sigpipe [1]); 1734 close (evpipe [1]);
1735 }
1054 1736
1055 while (pipe (sigpipe))
1056 syserr ("(libev) error creating pipe");
1057
1058 siginit (EV_A); 1737 evpipe_init (EV_A);
1738 /* now iterate over everything, in case we missed something */
1739 pipecb (EV_A_ &pipe_w, EV_READ);
1059 } 1740 }
1060 1741
1061 postfork = 0; 1742 postfork = 0;
1062} 1743}
1063 1744
1064#if EV_MULTIPLICITY 1745#if EV_MULTIPLICITY
1746
1065struct ev_loop * 1747struct ev_loop *
1066ev_loop_new (unsigned int flags) 1748ev_loop_new (unsigned int flags)
1067{ 1749{
1068 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 1750 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1069 1751
1070 memset (loop, 0, sizeof (struct ev_loop)); 1752 memset (EV_A, 0, sizeof (struct ev_loop));
1071
1072 loop_init (EV_A_ flags); 1753 loop_init (EV_A_ flags);
1073 1754
1074 if (ev_backend (EV_A)) 1755 if (ev_backend (EV_A))
1075 return loop; 1756 return EV_A;
1076 1757
1077 return 0; 1758 return 0;
1078} 1759}
1079 1760
1080void 1761void
… …
1085} 1766}
1086 1767
1087void 1768void
1088ev_loop_fork (EV_P) 1769ev_loop_fork (EV_P)
1089{ 1770{
1090 postfork = 1; 1771 postfork = 1; /* must be in line with ev_default_fork */
1091} 1772}
1773#endif /* multiplicity */
1092 1774
1775#if EV_VERIFY
1776static void noinline
1777verify_watcher (EV_P_ W w)
1778{
1779 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1780
1781 if (w->pending)
1782 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1783}
1784
1785static void noinline
1786verify_heap (EV_P_ ANHE *heap, int N)
1787{
1788 int i;
1789
1790 for (i = HEAP0; i < N + HEAP0; ++i)
1791 {
1792 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1793 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1794 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1795
1796 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1797 }
1798}
1799
1800static void noinline
1801array_verify (EV_P_ W *ws, int cnt)
1802{
1803 while (cnt--)
1804 {
1805 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1806 verify_watcher (EV_A_ ws [cnt]);
1807 }
1808}
1809#endif
1810
1811#if EV_MINIMAL < 2
1812void
1813ev_loop_verify (EV_P)
1814{
1815#if EV_VERIFY
1816 int i;
1817 WL w;
1818
1819 assert (activecnt >= -1);
1820
1821 assert (fdchangemax >= fdchangecnt);
1822 for (i = 0; i < fdchangecnt; ++i)
1823 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1824
1825 assert (anfdmax >= 0);
1826 for (i = 0; i < anfdmax; ++i)
1827 for (w = anfds [i].head; w; w = w->next)
1828 {
1829 verify_watcher (EV_A_ (W)w);
1830 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1831 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1832 }
1833
1834 assert (timermax >= timercnt);
1835 verify_heap (EV_A_ timers, timercnt);
1836
1837#if EV_PERIODIC_ENABLE
1838 assert (periodicmax >= periodiccnt);
1839 verify_heap (EV_A_ periodics, periodiccnt);
1840#endif
1841
1842 for (i = NUMPRI; i--; )
1843 {
1844 assert (pendingmax [i] >= pendingcnt [i]);
1845#if EV_IDLE_ENABLE
1846 assert (idleall >= 0);
1847 assert (idlemax [i] >= idlecnt [i]);
1848 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1849#endif
1850 }
1851
1852#if EV_FORK_ENABLE
1853 assert (forkmax >= forkcnt);
1854 array_verify (EV_A_ (W *)forks, forkcnt);
1855#endif
1856
1857#if EV_ASYNC_ENABLE
1858 assert (asyncmax >= asynccnt);
1859 array_verify (EV_A_ (W *)asyncs, asynccnt);
1860#endif
1861
1862 assert (preparemax >= preparecnt);
1863 array_verify (EV_A_ (W *)prepares, preparecnt);
1864
1865 assert (checkmax >= checkcnt);
1866 array_verify (EV_A_ (W *)checks, checkcnt);
1867
1868# if 0
1869 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1870 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1871# endif
1872#endif
1873}
1093#endif 1874#endif
1094 1875
1095#if EV_MULTIPLICITY 1876#if EV_MULTIPLICITY
1096struct ev_loop * 1877struct ev_loop *
1097ev_default_loop_init (unsigned int flags) 1878ev_default_loop_init (unsigned int flags)
1098#else 1879#else
1099int 1880int
1100ev_default_loop (unsigned int flags) 1881ev_default_loop (unsigned int flags)
1101#endif 1882#endif
1102{ 1883{
1103 if (sigpipe [0] == sigpipe [1])
1104 if (pipe (sigpipe))
1105 return 0;
1106
1107 if (!ev_default_loop_ptr) 1884 if (!ev_default_loop_ptr)
1108 { 1885 {
1109#if EV_MULTIPLICITY 1886#if EV_MULTIPLICITY
1110 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 1887 EV_P = ev_default_loop_ptr = &default_loop_struct;
1111#else 1888#else
1112 ev_default_loop_ptr = 1; 1889 ev_default_loop_ptr = 1;
1113#endif 1890#endif
1114 1891
1115 loop_init (EV_A_ flags); 1892 loop_init (EV_A_ flags);
1116 1893
1117 if (ev_backend (EV_A)) 1894 if (ev_backend (EV_A))
1118 { 1895 {
1119 siginit (EV_A);
1120
1121#ifndef _WIN32 1896#ifndef _WIN32
1122 ev_signal_init (&childev, childcb, SIGCHLD); 1897 ev_signal_init (&childev, childcb, SIGCHLD);
1123 ev_set_priority (&childev, EV_MAXPRI); 1898 ev_set_priority (&childev, EV_MAXPRI);
1124 ev_signal_start (EV_A_ &childev); 1899 ev_signal_start (EV_A_ &childev);
1125 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1900 ev_unref (EV_A); /* child watcher should not keep loop alive */
… …
1134 1909
1135void 1910void
1136ev_default_destroy (void) 1911ev_default_destroy (void)
1137{ 1912{
1138#if EV_MULTIPLICITY 1913#if EV_MULTIPLICITY
1139 struct ev_loop *loop = ev_default_loop_ptr; 1914 EV_P = ev_default_loop_ptr;
1140#endif 1915#endif
1916
1917 ev_default_loop_ptr = 0;
1141 1918
1142#ifndef _WIN32 1919#ifndef _WIN32
1143 ev_ref (EV_A); /* child watcher */ 1920 ev_ref (EV_A); /* child watcher */
1144 ev_signal_stop (EV_A_ &childev); 1921 ev_signal_stop (EV_A_ &childev);
1145#endif 1922#endif
1146 1923
1147 ev_ref (EV_A); /* signal watcher */
1148 ev_io_stop (EV_A_ &sigev);
1149
1150 close (sigpipe [0]); sigpipe [0] = 0;
1151 close (sigpipe [1]); sigpipe [1] = 0;
1152
1153 loop_destroy (EV_A); 1924 loop_destroy (EV_A);
1154} 1925}
1155 1926
1156void 1927void
1157ev_default_fork (void) 1928ev_default_fork (void)
1158{ 1929{
1159#if EV_MULTIPLICITY 1930#if EV_MULTIPLICITY
1160 struct ev_loop *loop = ev_default_loop_ptr; 1931 EV_P = ev_default_loop_ptr;
1161#endif 1932#endif
1162 1933
1163 if (backend) 1934 postfork = 1; /* must be in line with ev_loop_fork */
1164 postfork = 1;
1165} 1935}
1166 1936
1167/*****************************************************************************/ 1937/*****************************************************************************/
1168 1938
1169void 1939void
1170ev_invoke (EV_P_ void *w, int revents) 1940ev_invoke (EV_P_ void *w, int revents)
1171{ 1941{
1172 EV_CB_INVOKE ((W)w, revents); 1942 EV_CB_INVOKE ((W)w, revents);
1173} 1943}
1174 1944
1175void inline_speed 1945unsigned int
1176call_pending (EV_P) 1946ev_pending_count (EV_P)
1947{
1948 int pri;
1949 unsigned int count = 0;
1950
1951 for (pri = NUMPRI; pri--; )
1952 count += pendingcnt [pri];
1953
1954 return count;
1955}
1956
1957void noinline
1958ev_invoke_pending (EV_P)
1177{ 1959{
1178 int pri; 1960 int pri;
1179 1961
1180 for (pri = NUMPRI; pri--; ) 1962 for (pri = NUMPRI; pri--; )
1181 while (pendingcnt [pri]) 1963 while (pendingcnt [pri])
1182 { 1964 {
1183 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1965 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1184 1966
1185 if (expect_true (p->w))
1186 {
1187 /*assert (("non-pending watcher on pending list", p->w->pending));*/ 1967 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1968 /* ^ this is no longer true, as pending_w could be here */
1188 1969
1189 p->w->pending = 0; 1970 p->w->pending = 0;
1190 EV_CB_INVOKE (p->w, p->events); 1971 EV_CB_INVOKE (p->w, p->events);
1191 } 1972 EV_FREQUENT_CHECK;
1192 } 1973 }
1193} 1974}
1194 1975
1195void inline_size
1196timers_reify (EV_P)
1197{
1198 while (timercnt && ((WT)timers [0])->at <= mn_now)
1199 {
1200 ev_timer *w = timers [0];
1201
1202 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1203
1204 /* first reschedule or stop timer */
1205 if (w->repeat)
1206 {
1207 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1208
1209 ((WT)w)->at += w->repeat;
1210 if (((WT)w)->at < mn_now)
1211 ((WT)w)->at = mn_now;
1212
1213 downheap ((WT *)timers, timercnt, 0);
1214 }
1215 else
1216 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1217
1218 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1219 }
1220}
1221
1222#if EV_PERIODIC_ENABLE
1223void inline_size
1224periodics_reify (EV_P)
1225{
1226 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1227 {
1228 ev_periodic *w = periodics [0];
1229
1230 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1231
1232 /* first reschedule or stop timer */
1233 if (w->reschedule_cb)
1234 {
1235 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
1236 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1237 downheap ((WT *)periodics, periodiccnt, 0);
1238 }
1239 else if (w->interval)
1240 {
1241 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1242 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1243 downheap ((WT *)periodics, periodiccnt, 0);
1244 }
1245 else
1246 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1247
1248 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1249 }
1250}
1251
1252static void noinline
1253periodics_reschedule (EV_P)
1254{
1255 int i;
1256
1257 /* adjust periodics after time jump */
1258 for (i = 0; i < periodiccnt; ++i)
1259 {
1260 ev_periodic *w = periodics [i];
1261
1262 if (w->reschedule_cb)
1263 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1264 else if (w->interval)
1265 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1266 }
1267
1268 /* now rebuild the heap */
1269 for (i = periodiccnt >> 1; i--; )
1270 downheap ((WT *)periodics, periodiccnt, i);
1271}
1272#endif
1273
1274#if EV_IDLE_ENABLE 1976#if EV_IDLE_ENABLE
1275void inline_size 1977/* make idle watchers pending. this handles the "call-idle */
1978/* only when higher priorities are idle" logic */
1979inline_size void
1276idle_reify (EV_P) 1980idle_reify (EV_P)
1277{ 1981{
1278 if (expect_false (idleall)) 1982 if (expect_false (idleall))
1279 { 1983 {
1280 int pri; 1984 int pri;
… …
1292 } 1996 }
1293 } 1997 }
1294} 1998}
1295#endif 1999#endif
1296 2000
1297int inline_size 2001/* make timers pending */
1298time_update_monotonic (EV_P) 2002inline_size void
2003timers_reify (EV_P)
1299{ 2004{
2005 EV_FREQUENT_CHECK;
2006
2007 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2008 {
2009 do
2010 {
2011 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2012
2013 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2014
2015 /* first reschedule or stop timer */
2016 if (w->repeat)
2017 {
2018 ev_at (w) += w->repeat;
2019 if (ev_at (w) < mn_now)
2020 ev_at (w) = mn_now;
2021
2022 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2023
2024 ANHE_at_cache (timers [HEAP0]);
2025 downheap (timers, timercnt, HEAP0);
2026 }
2027 else
2028 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2029
2030 EV_FREQUENT_CHECK;
2031 feed_reverse (EV_A_ (W)w);
2032 }
2033 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2034
2035 feed_reverse_done (EV_A_ EV_TIMEOUT);
2036 }
2037}
2038
2039#if EV_PERIODIC_ENABLE
2040/* make periodics pending */
2041inline_size void
2042periodics_reify (EV_P)
2043{
2044 EV_FREQUENT_CHECK;
2045
2046 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2047 {
2048 int feed_count = 0;
2049
2050 do
2051 {
2052 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2053
2054 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2055
2056 /* first reschedule or stop timer */
2057 if (w->reschedule_cb)
2058 {
2059 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2060
2061 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2062
2063 ANHE_at_cache (periodics [HEAP0]);
2064 downheap (periodics, periodiccnt, HEAP0);
2065 }
2066 else if (w->interval)
2067 {
2068 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2069 /* if next trigger time is not sufficiently in the future, put it there */
2070 /* this might happen because of floating point inexactness */
2071 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2072 {
2073 ev_at (w) += w->interval;
2074
2075 /* if interval is unreasonably low we might still have a time in the past */
2076 /* so correct this. this will make the periodic very inexact, but the user */
2077 /* has effectively asked to get triggered more often than possible */
2078 if (ev_at (w) < ev_rt_now)
2079 ev_at (w) = ev_rt_now;
2080 }
2081
2082 ANHE_at_cache (periodics [HEAP0]);
2083 downheap (periodics, periodiccnt, HEAP0);
2084 }
2085 else
2086 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2087
2088 EV_FREQUENT_CHECK;
2089 feed_reverse (EV_A_ (W)w);
2090 }
2091 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2092
2093 feed_reverse_done (EV_A_ EV_PERIODIC);
2094 }
2095}
2096
2097/* simply recalculate all periodics */
2098/* TODO: maybe ensure that at leats one event happens when jumping forward? */
2099static void noinline
2100periodics_reschedule (EV_P)
2101{
2102 int i;
2103
2104 /* adjust periodics after time jump */
2105 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2106 {
2107 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2108
2109 if (w->reschedule_cb)
2110 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2111 else if (w->interval)
2112 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2113
2114 ANHE_at_cache (periodics [i]);
2115 }
2116
2117 reheap (periodics, periodiccnt);
2118}
2119#endif
2120
2121/* adjust all timers by a given offset */
2122static void noinline
2123timers_reschedule (EV_P_ ev_tstamp adjust)
2124{
2125 int i;
2126
2127 for (i = 0; i < timercnt; ++i)
2128 {
2129 ANHE *he = timers + i + HEAP0;
2130 ANHE_w (*he)->at += adjust;
2131 ANHE_at_cache (*he);
2132 }
2133}
2134
2135/* fetch new monotonic and realtime times from the kernel */
2136/* also detetc if there was a timejump, and act accordingly */
2137inline_speed void
2138time_update (EV_P_ ev_tstamp max_block)
2139{
2140#if EV_USE_MONOTONIC
2141 if (expect_true (have_monotonic))
2142 {
2143 int i;
2144 ev_tstamp odiff = rtmn_diff;
2145
1300 mn_now = get_clock (); 2146 mn_now = get_clock ();
1301 2147
2148 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2149 /* interpolate in the meantime */
1302 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 2150 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1303 { 2151 {
1304 ev_rt_now = rtmn_diff + mn_now; 2152 ev_rt_now = rtmn_diff + mn_now;
1305 return 0; 2153 return;
1306 } 2154 }
1307 else 2155
1308 {
1309 now_floor = mn_now; 2156 now_floor = mn_now;
1310 ev_rt_now = ev_time (); 2157 ev_rt_now = ev_time ();
1311 return 1;
1312 }
1313}
1314 2158
1315void inline_size 2159 /* loop a few times, before making important decisions.
1316time_update (EV_P) 2160 * on the choice of "4": one iteration isn't enough,
1317{ 2161 * in case we get preempted during the calls to
1318 int i; 2162 * ev_time and get_clock. a second call is almost guaranteed
1319 2163 * to succeed in that case, though. and looping a few more times
1320#if EV_USE_MONOTONIC 2164 * doesn't hurt either as we only do this on time-jumps or
1321 if (expect_true (have_monotonic)) 2165 * in the unlikely event of having been preempted here.
1322 { 2166 */
1323 if (time_update_monotonic (EV_A)) 2167 for (i = 4; --i; )
1324 { 2168 {
1325 ev_tstamp odiff = rtmn_diff;
1326
1327 /* loop a few times, before making important decisions.
1328 * on the choice of "4": one iteration isn't enough,
1329 * in case we get preempted during the calls to
1330 * ev_time and get_clock. a second call is almost guaranteed
1331 * to succeed in that case, though. and looping a few more times
1332 * doesn't hurt either as we only do this on time-jumps or
1333 * in the unlikely event of having been preempted here.
1334 */
1335 for (i = 4; --i; )
1336 {
1337 rtmn_diff = ev_rt_now - mn_now; 2169 rtmn_diff = ev_rt_now - mn_now;
1338 2170
1339 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2171 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1340 return; /* all is well */ 2172 return; /* all is well */
1341 2173
1342 ev_rt_now = ev_time (); 2174 ev_rt_now = ev_time ();
1343 mn_now = get_clock (); 2175 mn_now = get_clock ();
1344 now_floor = mn_now; 2176 now_floor = mn_now;
1345 } 2177 }
1346 2178
2179 /* no timer adjustment, as the monotonic clock doesn't jump */
2180 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1347# if EV_PERIODIC_ENABLE 2181# if EV_PERIODIC_ENABLE
1348 periodics_reschedule (EV_A); 2182 periodics_reschedule (EV_A);
1349# endif 2183# endif
1350 /* no timer adjustment, as the monotonic clock doesn't jump */
1351 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1352 }
1353 } 2184 }
1354 else 2185 else
1355#endif 2186#endif
1356 { 2187 {
1357 ev_rt_now = ev_time (); 2188 ev_rt_now = ev_time ();
1358 2189
1359 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 2190 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1360 { 2191 {
2192 /* adjust timers. this is easy, as the offset is the same for all of them */
2193 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1361#if EV_PERIODIC_ENABLE 2194#if EV_PERIODIC_ENABLE
1362 periodics_reschedule (EV_A); 2195 periodics_reschedule (EV_A);
1363#endif 2196#endif
1364
1365 /* adjust timers. this is easy, as the offset is the same for all of them */
1366 for (i = 0; i < timercnt; ++i)
1367 ((WT)timers [i])->at += ev_rt_now - mn_now;
1368 } 2197 }
1369 2198
1370 mn_now = ev_rt_now; 2199 mn_now = ev_rt_now;
1371 } 2200 }
1372} 2201}
1373 2202
1374void 2203void
1375ev_ref (EV_P)
1376{
1377 ++activecnt;
1378}
1379
1380void
1381ev_unref (EV_P)
1382{
1383 --activecnt;
1384}
1385
1386static int loop_done;
1387
1388void
1389ev_loop (EV_P_ int flags) 2204ev_loop (EV_P_ int flags)
1390{ 2205{
1391 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2206#if EV_MINIMAL < 2
1392 ? EVUNLOOP_ONE 2207 ++loop_depth;
1393 : EVUNLOOP_CANCEL; 2208#endif
1394 2209
2210 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2211
2212 loop_done = EVUNLOOP_CANCEL;
2213
1395 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2214 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1396 2215
1397 do 2216 do
1398 { 2217 {
2218#if EV_VERIFY >= 2
2219 ev_loop_verify (EV_A);
2220#endif
2221
1399#ifndef _WIN32 2222#ifndef _WIN32
1400 if (expect_false (curpid)) /* penalise the forking check even more */ 2223 if (expect_false (curpid)) /* penalise the forking check even more */
1401 if (expect_false (getpid () != curpid)) 2224 if (expect_false (getpid () != curpid))
1402 { 2225 {
1403 curpid = getpid (); 2226 curpid = getpid ();
… …
1409 /* we might have forked, so queue fork handlers */ 2232 /* we might have forked, so queue fork handlers */
1410 if (expect_false (postfork)) 2233 if (expect_false (postfork))
1411 if (forkcnt) 2234 if (forkcnt)
1412 { 2235 {
1413 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2236 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1414 call_pending (EV_A); 2237 EV_INVOKE_PENDING;
1415 } 2238 }
1416#endif 2239#endif
1417 2240
1418 /* queue check watchers (and execute them) */ 2241 /* queue prepare watchers (and execute them) */
1419 if (expect_false (preparecnt)) 2242 if (expect_false (preparecnt))
1420 { 2243 {
1421 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2244 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1422 call_pending (EV_A); 2245 EV_INVOKE_PENDING;
1423 } 2246 }
1424 2247
1425 if (expect_false (!activecnt)) 2248 if (expect_false (loop_done))
1426 break; 2249 break;
1427 2250
1428 /* we might have forked, so reify kernel state if necessary */ 2251 /* we might have forked, so reify kernel state if necessary */
1429 if (expect_false (postfork)) 2252 if (expect_false (postfork))
1430 loop_fork (EV_A); 2253 loop_fork (EV_A);
… …
1432 /* update fd-related kernel structures */ 2255 /* update fd-related kernel structures */
1433 fd_reify (EV_A); 2256 fd_reify (EV_A);
1434 2257
1435 /* calculate blocking time */ 2258 /* calculate blocking time */
1436 { 2259 {
1437 ev_tstamp block; 2260 ev_tstamp waittime = 0.;
2261 ev_tstamp sleeptime = 0.;
1438 2262
1439 if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt)) 2263 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1440 block = 0.; /* do not block at all */
1441 else
1442 { 2264 {
2265 /* remember old timestamp for io_blocktime calculation */
2266 ev_tstamp prev_mn_now = mn_now;
2267
1443 /* update time to cancel out callback processing overhead */ 2268 /* update time to cancel out callback processing overhead */
1444#if EV_USE_MONOTONIC
1445 if (expect_true (have_monotonic))
1446 time_update_monotonic (EV_A); 2269 time_update (EV_A_ 1e100);
1447 else
1448#endif
1449 {
1450 ev_rt_now = ev_time ();
1451 mn_now = ev_rt_now;
1452 }
1453 2270
1454 block = MAX_BLOCKTIME; 2271 waittime = MAX_BLOCKTIME;
1455 2272
1456 if (timercnt) 2273 if (timercnt)
1457 { 2274 {
1458 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 2275 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1459 if (block > to) block = to; 2276 if (waittime > to) waittime = to;
1460 } 2277 }
1461 2278
1462#if EV_PERIODIC_ENABLE 2279#if EV_PERIODIC_ENABLE
1463 if (periodiccnt) 2280 if (periodiccnt)
1464 { 2281 {
1465 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 2282 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1466 if (block > to) block = to; 2283 if (waittime > to) waittime = to;
1467 } 2284 }
1468#endif 2285#endif
1469 2286
2287 /* don't let timeouts decrease the waittime below timeout_blocktime */
2288 if (expect_false (waittime < timeout_blocktime))
2289 waittime = timeout_blocktime;
2290
2291 /* extra check because io_blocktime is commonly 0 */
1470 if (expect_false (block < 0.)) block = 0.; 2292 if (expect_false (io_blocktime))
2293 {
2294 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2295
2296 if (sleeptime > waittime - backend_fudge)
2297 sleeptime = waittime - backend_fudge;
2298
2299 if (expect_true (sleeptime > 0.))
2300 {
2301 ev_sleep (sleeptime);
2302 waittime -= sleeptime;
2303 }
2304 }
1471 } 2305 }
1472 2306
2307#if EV_MINIMAL < 2
1473 ++loop_count; 2308 ++loop_count;
2309#endif
2310 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
1474 backend_poll (EV_A_ block); 2311 backend_poll (EV_A_ waittime);
2312 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2313
2314 /* update ev_rt_now, do magic */
2315 time_update (EV_A_ waittime + sleeptime);
1475 } 2316 }
1476
1477 /* update ev_rt_now, do magic */
1478 time_update (EV_A);
1479 2317
1480 /* queue pending timers and reschedule them */ 2318 /* queue pending timers and reschedule them */
1481 timers_reify (EV_A); /* relative timers called last */ 2319 timers_reify (EV_A); /* relative timers called last */
1482#if EV_PERIODIC_ENABLE 2320#if EV_PERIODIC_ENABLE
1483 periodics_reify (EV_A); /* absolute timers called first */ 2321 periodics_reify (EV_A); /* absolute timers called first */
… …
1490 2328
1491 /* queue check watchers, to be executed first */ 2329 /* queue check watchers, to be executed first */
1492 if (expect_false (checkcnt)) 2330 if (expect_false (checkcnt))
1493 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2331 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1494 2332
1495 call_pending (EV_A); 2333 EV_INVOKE_PENDING;
1496
1497 } 2334 }
1498 while (expect_true (activecnt && !loop_done)); 2335 while (expect_true (
2336 activecnt
2337 && !loop_done
2338 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2339 ));
1499 2340
1500 if (loop_done == EVUNLOOP_ONE) 2341 if (loop_done == EVUNLOOP_ONE)
1501 loop_done = EVUNLOOP_CANCEL; 2342 loop_done = EVUNLOOP_CANCEL;
2343
2344#if EV_MINIMAL < 2
2345 --loop_depth;
2346#endif
1502} 2347}
1503 2348
1504void 2349void
1505ev_unloop (EV_P_ int how) 2350ev_unloop (EV_P_ int how)
1506{ 2351{
1507 loop_done = how; 2352 loop_done = how;
1508} 2353}
1509 2354
2355void
2356ev_ref (EV_P)
2357{
2358 ++activecnt;
2359}
2360
2361void
2362ev_unref (EV_P)
2363{
2364 --activecnt;
2365}
2366
2367void
2368ev_now_update (EV_P)
2369{
2370 time_update (EV_A_ 1e100);
2371}
2372
2373void
2374ev_suspend (EV_P)
2375{
2376 ev_now_update (EV_A);
2377}
2378
2379void
2380ev_resume (EV_P)
2381{
2382 ev_tstamp mn_prev = mn_now;
2383
2384 ev_now_update (EV_A);
2385 timers_reschedule (EV_A_ mn_now - mn_prev);
2386#if EV_PERIODIC_ENABLE
2387 /* TODO: really do this? */
2388 periodics_reschedule (EV_A);
2389#endif
2390}
2391
1510/*****************************************************************************/ 2392/*****************************************************************************/
2393/* singly-linked list management, used when the expected list length is short */
1511 2394
1512void inline_size 2395inline_size void
1513wlist_add (WL *head, WL elem) 2396wlist_add (WL *head, WL elem)
1514{ 2397{
1515 elem->next = *head; 2398 elem->next = *head;
1516 *head = elem; 2399 *head = elem;
1517} 2400}
1518 2401
1519void inline_size 2402inline_size void
1520wlist_del (WL *head, WL elem) 2403wlist_del (WL *head, WL elem)
1521{ 2404{
1522 while (*head) 2405 while (*head)
1523 { 2406 {
1524 if (*head == elem) 2407 if (expect_true (*head == elem))
1525 { 2408 {
1526 *head = elem->next; 2409 *head = elem->next;
1527 return; 2410 break;
1528 } 2411 }
1529 2412
1530 head = &(*head)->next; 2413 head = &(*head)->next;
1531 } 2414 }
1532} 2415}
1533 2416
1534void inline_speed 2417/* internal, faster, version of ev_clear_pending */
2418inline_speed void
1535clear_pending (EV_P_ W w) 2419clear_pending (EV_P_ W w)
1536{ 2420{
1537 if (w->pending) 2421 if (w->pending)
1538 { 2422 {
1539 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2423 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1540 w->pending = 0; 2424 w->pending = 0;
1541 } 2425 }
1542} 2426}
1543 2427
1544int 2428int
1545ev_clear_pending (EV_P_ void *w) 2429ev_clear_pending (EV_P_ void *w)
1546{ 2430{
1547 W w_ = (W)w; 2431 W w_ = (W)w;
1548 int pending = w_->pending; 2432 int pending = w_->pending;
1549 2433
1550 if (!pending) 2434 if (expect_true (pending))
2435 {
2436 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2437 p->w = (W)&pending_w;
2438 w_->pending = 0;
2439 return p->events;
2440 }
2441 else
1551 return 0; 2442 return 0;
1552
1553 w_->pending = 0;
1554 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1555 p->w = 0;
1556
1557 return p->events;
1558} 2443}
1559 2444
1560void inline_size 2445inline_size void
1561pri_adjust (EV_P_ W w) 2446pri_adjust (EV_P_ W w)
1562{ 2447{
1563 int pri = w->priority; 2448 int pri = ev_priority (w);
1564 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 2449 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1565 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 2450 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1566 w->priority = pri; 2451 ev_set_priority (w, pri);
1567} 2452}
1568 2453
1569void inline_speed 2454inline_speed void
1570ev_start (EV_P_ W w, int active) 2455ev_start (EV_P_ W w, int active)
1571{ 2456{
1572 pri_adjust (EV_A_ w); 2457 pri_adjust (EV_A_ w);
1573 w->active = active; 2458 w->active = active;
1574 ev_ref (EV_A); 2459 ev_ref (EV_A);
1575} 2460}
1576 2461
1577void inline_size 2462inline_size void
1578ev_stop (EV_P_ W w) 2463ev_stop (EV_P_ W w)
1579{ 2464{
1580 ev_unref (EV_A); 2465 ev_unref (EV_A);
1581 w->active = 0; 2466 w->active = 0;
1582} 2467}
1583 2468
1584/*****************************************************************************/ 2469/*****************************************************************************/
1585 2470
1586void 2471void noinline
1587ev_io_start (EV_P_ ev_io *w) 2472ev_io_start (EV_P_ ev_io *w)
1588{ 2473{
1589 int fd = w->fd; 2474 int fd = w->fd;
1590 2475
1591 if (expect_false (ev_is_active (w))) 2476 if (expect_false (ev_is_active (w)))
1592 return; 2477 return;
1593 2478
1594 assert (("ev_io_start called with negative fd", fd >= 0)); 2479 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2480 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2481
2482 EV_FREQUENT_CHECK;
1595 2483
1596 ev_start (EV_A_ (W)w, 1); 2484 ev_start (EV_A_ (W)w, 1);
1597 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2485 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1598 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2486 wlist_add (&anfds[fd].head, (WL)w);
1599 2487
1600 fd_change (EV_A_ fd); 2488 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1601} 2489 w->events &= ~EV__IOFDSET;
1602 2490
1603void 2491 EV_FREQUENT_CHECK;
2492}
2493
2494void noinline
1604ev_io_stop (EV_P_ ev_io *w) 2495ev_io_stop (EV_P_ ev_io *w)
1605{ 2496{
1606 clear_pending (EV_A_ (W)w); 2497 clear_pending (EV_A_ (W)w);
1607 if (expect_false (!ev_is_active (w))) 2498 if (expect_false (!ev_is_active (w)))
1608 return; 2499 return;
1609 2500
1610 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2501 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1611 2502
2503 EV_FREQUENT_CHECK;
2504
1612 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2505 wlist_del (&anfds[w->fd].head, (WL)w);
1613 ev_stop (EV_A_ (W)w); 2506 ev_stop (EV_A_ (W)w);
1614 2507
1615 fd_change (EV_A_ w->fd); 2508 fd_change (EV_A_ w->fd, 1);
1616}
1617 2509
1618void 2510 EV_FREQUENT_CHECK;
2511}
2512
2513void noinline
1619ev_timer_start (EV_P_ ev_timer *w) 2514ev_timer_start (EV_P_ ev_timer *w)
1620{ 2515{
1621 if (expect_false (ev_is_active (w))) 2516 if (expect_false (ev_is_active (w)))
1622 return; 2517 return;
1623 2518
1624 ((WT)w)->at += mn_now; 2519 ev_at (w) += mn_now;
1625 2520
1626 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2521 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1627 2522
2523 EV_FREQUENT_CHECK;
2524
2525 ++timercnt;
1628 ev_start (EV_A_ (W)w, ++timercnt); 2526 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1629 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 2527 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1630 timers [timercnt - 1] = w; 2528 ANHE_w (timers [ev_active (w)]) = (WT)w;
1631 upheap ((WT *)timers, timercnt - 1); 2529 ANHE_at_cache (timers [ev_active (w)]);
2530 upheap (timers, ev_active (w));
1632 2531
2532 EV_FREQUENT_CHECK;
2533
1633 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 2534 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1634} 2535}
1635 2536
1636void 2537void noinline
1637ev_timer_stop (EV_P_ ev_timer *w) 2538ev_timer_stop (EV_P_ ev_timer *w)
1638{ 2539{
1639 clear_pending (EV_A_ (W)w); 2540 clear_pending (EV_A_ (W)w);
1640 if (expect_false (!ev_is_active (w))) 2541 if (expect_false (!ev_is_active (w)))
1641 return; 2542 return;
1642 2543
1643 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2544 EV_FREQUENT_CHECK;
1644 2545
1645 { 2546 {
1646 int active = ((W)w)->active; 2547 int active = ev_active (w);
1647 2548
2549 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2550
2551 --timercnt;
2552
1648 if (expect_true (--active < --timercnt)) 2553 if (expect_true (active < timercnt + HEAP0))
1649 { 2554 {
1650 timers [active] = timers [timercnt]; 2555 timers [active] = timers [timercnt + HEAP0];
1651 adjustheap ((WT *)timers, timercnt, active); 2556 adjustheap (timers, timercnt, active);
1652 } 2557 }
1653 } 2558 }
1654 2559
1655 ((WT)w)->at -= mn_now; 2560 EV_FREQUENT_CHECK;
2561
2562 ev_at (w) -= mn_now;
1656 2563
1657 ev_stop (EV_A_ (W)w); 2564 ev_stop (EV_A_ (W)w);
1658} 2565}
1659 2566
1660void 2567void noinline
1661ev_timer_again (EV_P_ ev_timer *w) 2568ev_timer_again (EV_P_ ev_timer *w)
1662{ 2569{
2570 EV_FREQUENT_CHECK;
2571
1663 if (ev_is_active (w)) 2572 if (ev_is_active (w))
1664 { 2573 {
1665 if (w->repeat) 2574 if (w->repeat)
1666 { 2575 {
1667 ((WT)w)->at = mn_now + w->repeat; 2576 ev_at (w) = mn_now + w->repeat;
2577 ANHE_at_cache (timers [ev_active (w)]);
1668 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2578 adjustheap (timers, timercnt, ev_active (w));
1669 } 2579 }
1670 else 2580 else
1671 ev_timer_stop (EV_A_ w); 2581 ev_timer_stop (EV_A_ w);
1672 } 2582 }
1673 else if (w->repeat) 2583 else if (w->repeat)
1674 { 2584 {
1675 w->at = w->repeat; 2585 ev_at (w) = w->repeat;
1676 ev_timer_start (EV_A_ w); 2586 ev_timer_start (EV_A_ w);
1677 } 2587 }
2588
2589 EV_FREQUENT_CHECK;
2590}
2591
2592ev_tstamp
2593ev_timer_remaining (EV_P_ ev_timer *w)
2594{
2595 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1678} 2596}
1679 2597
1680#if EV_PERIODIC_ENABLE 2598#if EV_PERIODIC_ENABLE
1681void 2599void noinline
1682ev_periodic_start (EV_P_ ev_periodic *w) 2600ev_periodic_start (EV_P_ ev_periodic *w)
1683{ 2601{
1684 if (expect_false (ev_is_active (w))) 2602 if (expect_false (ev_is_active (w)))
1685 return; 2603 return;
1686 2604
1687 if (w->reschedule_cb) 2605 if (w->reschedule_cb)
1688 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2606 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1689 else if (w->interval) 2607 else if (w->interval)
1690 { 2608 {
1691 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2609 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1692 /* this formula differs from the one in periodic_reify because we do not always round up */ 2610 /* this formula differs from the one in periodic_reify because we do not always round up */
1693 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2611 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1694 } 2612 }
2613 else
2614 ev_at (w) = w->offset;
1695 2615
2616 EV_FREQUENT_CHECK;
2617
2618 ++periodiccnt;
1696 ev_start (EV_A_ (W)w, ++periodiccnt); 2619 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1697 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 2620 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1698 periodics [periodiccnt - 1] = w; 2621 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1699 upheap ((WT *)periodics, periodiccnt - 1); 2622 ANHE_at_cache (periodics [ev_active (w)]);
2623 upheap (periodics, ev_active (w));
1700 2624
2625 EV_FREQUENT_CHECK;
2626
1701 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 2627 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1702} 2628}
1703 2629
1704void 2630void noinline
1705ev_periodic_stop (EV_P_ ev_periodic *w) 2631ev_periodic_stop (EV_P_ ev_periodic *w)
1706{ 2632{
1707 clear_pending (EV_A_ (W)w); 2633 clear_pending (EV_A_ (W)w);
1708 if (expect_false (!ev_is_active (w))) 2634 if (expect_false (!ev_is_active (w)))
1709 return; 2635 return;
1710 2636
1711 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2637 EV_FREQUENT_CHECK;
1712 2638
1713 { 2639 {
1714 int active = ((W)w)->active; 2640 int active = ev_active (w);
1715 2641
2642 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2643
2644 --periodiccnt;
2645
1716 if (expect_true (--active < --periodiccnt)) 2646 if (expect_true (active < periodiccnt + HEAP0))
1717 { 2647 {
1718 periodics [active] = periodics [periodiccnt]; 2648 periodics [active] = periodics [periodiccnt + HEAP0];
1719 adjustheap ((WT *)periodics, periodiccnt, active); 2649 adjustheap (periodics, periodiccnt, active);
1720 } 2650 }
1721 } 2651 }
1722 2652
2653 EV_FREQUENT_CHECK;
2654
1723 ev_stop (EV_A_ (W)w); 2655 ev_stop (EV_A_ (W)w);
1724} 2656}
1725 2657
1726void 2658void noinline
1727ev_periodic_again (EV_P_ ev_periodic *w) 2659ev_periodic_again (EV_P_ ev_periodic *w)
1728{ 2660{
1729 /* TODO: use adjustheap and recalculation */ 2661 /* TODO: use adjustheap and recalculation */
1730 ev_periodic_stop (EV_A_ w); 2662 ev_periodic_stop (EV_A_ w);
1731 ev_periodic_start (EV_A_ w); 2663 ev_periodic_start (EV_A_ w);
… …
1734 2666
1735#ifndef SA_RESTART 2667#ifndef SA_RESTART
1736# define SA_RESTART 0 2668# define SA_RESTART 0
1737#endif 2669#endif
1738 2670
1739void 2671void noinline
1740ev_signal_start (EV_P_ ev_signal *w) 2672ev_signal_start (EV_P_ ev_signal *w)
1741{ 2673{
1742#if EV_MULTIPLICITY
1743 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1744#endif
1745 if (expect_false (ev_is_active (w))) 2674 if (expect_false (ev_is_active (w)))
1746 return; 2675 return;
1747 2676
1748 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2677 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2678
2679#if EV_MULTIPLICITY
2680 assert (("libev: a signal must not be attached to two different loops",
2681 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2682
2683 signals [w->signum - 1].loop = EV_A;
2684#endif
2685
2686 EV_FREQUENT_CHECK;
2687
2688#if EV_USE_SIGNALFD
2689 if (sigfd == -2)
2690 {
2691 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2692 if (sigfd < 0 && errno == EINVAL)
2693 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2694
2695 if (sigfd >= 0)
2696 {
2697 fd_intern (sigfd); /* doing it twice will not hurt */
2698
2699 sigemptyset (&sigfd_set);
2700
2701 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2702 ev_set_priority (&sigfd_w, EV_MAXPRI);
2703 ev_io_start (EV_A_ &sigfd_w);
2704 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2705 }
2706 }
2707
2708 if (sigfd >= 0)
2709 {
2710 /* TODO: check .head */
2711 sigaddset (&sigfd_set, w->signum);
2712 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2713
2714 signalfd (sigfd, &sigfd_set, 0);
2715 }
2716#endif
1749 2717
1750 ev_start (EV_A_ (W)w, 1); 2718 ev_start (EV_A_ (W)w, 1);
1751 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1752 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2719 wlist_add (&signals [w->signum - 1].head, (WL)w);
1753 2720
1754 if (!((WL)w)->next) 2721 if (!((WL)w)->next)
2722# if EV_USE_SIGNALFD
2723 if (sigfd < 0) /*TODO*/
2724# endif
1755 { 2725 {
1756#if _WIN32 2726# if _WIN32
1757 signal (w->signum, sighandler); 2727 signal (w->signum, ev_sighandler);
1758#else 2728# else
1759 struct sigaction sa; 2729 struct sigaction sa;
2730
2731 evpipe_init (EV_A);
2732
1760 sa.sa_handler = sighandler; 2733 sa.sa_handler = ev_sighandler;
1761 sigfillset (&sa.sa_mask); 2734 sigfillset (&sa.sa_mask);
1762 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2735 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1763 sigaction (w->signum, &sa, 0); 2736 sigaction (w->signum, &sa, 0);
2737
2738 sigemptyset (&sa.sa_mask);
2739 sigaddset (&sa.sa_mask, w->signum);
2740 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
1764#endif 2741#endif
1765 } 2742 }
1766}
1767 2743
1768void 2744 EV_FREQUENT_CHECK;
2745}
2746
2747void noinline
1769ev_signal_stop (EV_P_ ev_signal *w) 2748ev_signal_stop (EV_P_ ev_signal *w)
1770{ 2749{
1771 clear_pending (EV_A_ (W)w); 2750 clear_pending (EV_A_ (W)w);
1772 if (expect_false (!ev_is_active (w))) 2751 if (expect_false (!ev_is_active (w)))
1773 return; 2752 return;
1774 2753
2754 EV_FREQUENT_CHECK;
2755
1775 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2756 wlist_del (&signals [w->signum - 1].head, (WL)w);
1776 ev_stop (EV_A_ (W)w); 2757 ev_stop (EV_A_ (W)w);
1777 2758
1778 if (!signals [w->signum - 1].head) 2759 if (!signals [w->signum - 1].head)
2760 {
2761#if EV_MULTIPLICITY
2762 signals [w->signum - 1].loop = 0; /* unattach from signal */
2763#endif
2764#if EV_USE_SIGNALFD
2765 if (sigfd >= 0)
2766 {
2767 sigprocmask (SIG_UNBLOCK, &sigfd_set, 0);//D
2768 sigdelset (&sigfd_set, w->signum);
2769 signalfd (sigfd, &sigfd_set, 0);
2770 sigprocmask (SIG_BLOCK, &sigfd_set, 0);//D
2771 /*TODO: maybe unblock signal? */
2772 }
2773 else
2774#endif
1779 signal (w->signum, SIG_DFL); 2775 signal (w->signum, SIG_DFL);
2776 }
2777
2778 EV_FREQUENT_CHECK;
1780} 2779}
1781 2780
1782void 2781void
1783ev_child_start (EV_P_ ev_child *w) 2782ev_child_start (EV_P_ ev_child *w)
1784{ 2783{
1785#if EV_MULTIPLICITY 2784#if EV_MULTIPLICITY
1786 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 2785 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1787#endif 2786#endif
1788 if (expect_false (ev_is_active (w))) 2787 if (expect_false (ev_is_active (w)))
1789 return; 2788 return;
1790 2789
2790 EV_FREQUENT_CHECK;
2791
1791 ev_start (EV_A_ (W)w, 1); 2792 ev_start (EV_A_ (W)w, 1);
1792 wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 2793 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2794
2795 EV_FREQUENT_CHECK;
1793} 2796}
1794 2797
1795void 2798void
1796ev_child_stop (EV_P_ ev_child *w) 2799ev_child_stop (EV_P_ ev_child *w)
1797{ 2800{
1798 clear_pending (EV_A_ (W)w); 2801 clear_pending (EV_A_ (W)w);
1799 if (expect_false (!ev_is_active (w))) 2802 if (expect_false (!ev_is_active (w)))
1800 return; 2803 return;
1801 2804
2805 EV_FREQUENT_CHECK;
2806
1802 wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 2807 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1803 ev_stop (EV_A_ (W)w); 2808 ev_stop (EV_A_ (W)w);
2809
2810 EV_FREQUENT_CHECK;
1804} 2811}
1805 2812
1806#if EV_STAT_ENABLE 2813#if EV_STAT_ENABLE
1807 2814
1808# ifdef _WIN32 2815# ifdef _WIN32
1809# undef lstat 2816# undef lstat
1810# define lstat(a,b) _stati64 (a,b) 2817# define lstat(a,b) _stati64 (a,b)
1811# endif 2818# endif
1812 2819
1813#define DEF_STAT_INTERVAL 5.0074891 2820#define DEF_STAT_INTERVAL 5.0074891
2821#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1814#define MIN_STAT_INTERVAL 0.1074891 2822#define MIN_STAT_INTERVAL 0.1074891
1815 2823
1816static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 2824static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1817 2825
1818#if EV_USE_INOTIFY 2826#if EV_USE_INOTIFY
1819# define EV_INOTIFY_BUFSIZE 8192 2827# define EV_INOTIFY_BUFSIZE 8192
… …
1823{ 2831{
1824 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); 2832 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);
1825 2833
1826 if (w->wd < 0) 2834 if (w->wd < 0)
1827 { 2835 {
2836 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1828 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 2837 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
1829 2838
1830 /* monitor some parent directory for speedup hints */ 2839 /* monitor some parent directory for speedup hints */
2840 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2841 /* but an efficiency issue only */
1831 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 2842 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1832 { 2843 {
1833 char path [4096]; 2844 char path [4096];
1834 strcpy (path, w->path); 2845 strcpy (path, w->path);
1835 2846
… …
1838 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 2849 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1839 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 2850 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1840 2851
1841 char *pend = strrchr (path, '/'); 2852 char *pend = strrchr (path, '/');
1842 2853
1843 if (!pend) 2854 if (!pend || pend == path)
1844 break; /* whoops, no '/', complain to your admin */ 2855 break;
1845 2856
1846 *pend = 0; 2857 *pend = 0;
1847 w->wd = inotify_add_watch (fs_fd, path, mask); 2858 w->wd = inotify_add_watch (fs_fd, path, mask);
1848 } 2859 }
1849 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 2860 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1850 } 2861 }
1851 } 2862 }
1852 else
1853 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1854 2863
1855 if (w->wd >= 0) 2864 if (w->wd >= 0)
2865 {
1856 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 2866 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2867
2868 /* now local changes will be tracked by inotify, but remote changes won't */
2869 /* unless the filesystem it known to be local, we therefore still poll */
2870 /* also do poll on <2.6.25, but with normal frequency */
2871 struct statfs sfs;
2872
2873 if (fs_2625 && !statfs (w->path, &sfs))
2874 if (sfs.f_type == 0x1373 /* devfs */
2875 || sfs.f_type == 0xEF53 /* ext2/3 */
2876 || sfs.f_type == 0x3153464a /* jfs */
2877 || sfs.f_type == 0x52654973 /* reiser3 */
2878 || sfs.f_type == 0x01021994 /* tempfs */
2879 || sfs.f_type == 0x58465342 /* xfs */)
2880 return;
2881
2882 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2883 ev_timer_again (EV_A_ &w->timer);
2884 }
1857} 2885}
1858 2886
1859static void noinline 2887static void noinline
1860infy_del (EV_P_ ev_stat *w) 2888infy_del (EV_P_ ev_stat *w)
1861{ 2889{
… …
1875 2903
1876static void noinline 2904static void noinline
1877infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 2905infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1878{ 2906{
1879 if (slot < 0) 2907 if (slot < 0)
1880 /* overflow, need to check for all hahs slots */ 2908 /* overflow, need to check for all hash slots */
1881 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 2909 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
1882 infy_wd (EV_A_ slot, wd, ev); 2910 infy_wd (EV_A_ slot, wd, ev);
1883 else 2911 else
1884 { 2912 {
1885 WL w_; 2913 WL w_;
… …
1891 2919
1892 if (w->wd == wd || wd == -1) 2920 if (w->wd == wd || wd == -1)
1893 { 2921 {
1894 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 2922 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1895 { 2923 {
2924 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
1896 w->wd = -1; 2925 w->wd = -1;
1897 infy_add (EV_A_ w); /* re-add, no matter what */ 2926 infy_add (EV_A_ w); /* re-add, no matter what */
1898 } 2927 }
1899 2928
1900 stat_timer_cb (EV_A_ &w->timer, 0); 2929 stat_timer_cb (EV_A_ &w->timer, 0);
… …
1913 2942
1914 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 2943 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
1915 infy_wd (EV_A_ ev->wd, ev->wd, ev); 2944 infy_wd (EV_A_ ev->wd, ev->wd, ev);
1916} 2945}
1917 2946
1918void inline_size 2947inline_size void
2948check_2625 (EV_P)
2949{
2950 /* kernels < 2.6.25 are borked
2951 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2952 */
2953 struct utsname buf;
2954 int major, minor, micro;
2955
2956 if (uname (&buf))
2957 return;
2958
2959 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2960 return;
2961
2962 if (major < 2
2963 || (major == 2 && minor < 6)
2964 || (major == 2 && minor == 6 && micro < 25))
2965 return;
2966
2967 fs_2625 = 1;
2968}
2969
2970inline_size void
1919infy_init (EV_P) 2971infy_init (EV_P)
1920{ 2972{
1921 if (fs_fd != -2) 2973 if (fs_fd != -2)
1922 return; 2974 return;
2975
2976 fs_fd = -1;
2977
2978 check_2625 (EV_A);
1923 2979
1924 fs_fd = inotify_init (); 2980 fs_fd = inotify_init ();
1925 2981
1926 if (fs_fd >= 0) 2982 if (fs_fd >= 0)
1927 { 2983 {
… …
1929 ev_set_priority (&fs_w, EV_MAXPRI); 2985 ev_set_priority (&fs_w, EV_MAXPRI);
1930 ev_io_start (EV_A_ &fs_w); 2986 ev_io_start (EV_A_ &fs_w);
1931 } 2987 }
1932} 2988}
1933 2989
1934void inline_size 2990inline_size void
1935infy_fork (EV_P) 2991infy_fork (EV_P)
1936{ 2992{
1937 int slot; 2993 int slot;
1938 2994
1939 if (fs_fd < 0) 2995 if (fs_fd < 0)
… …
1955 w->wd = -1; 3011 w->wd = -1;
1956 3012
1957 if (fs_fd >= 0) 3013 if (fs_fd >= 0)
1958 infy_add (EV_A_ w); /* re-add, no matter what */ 3014 infy_add (EV_A_ w); /* re-add, no matter what */
1959 else 3015 else
1960 ev_timer_start (EV_A_ &w->timer); 3016 ev_timer_again (EV_A_ &w->timer);
1961 } 3017 }
1962
1963 } 3018 }
1964} 3019}
1965 3020
3021#endif
3022
3023#ifdef _WIN32
3024# define EV_LSTAT(p,b) _stati64 (p, b)
3025#else
3026# define EV_LSTAT(p,b) lstat (p, b)
1966#endif 3027#endif
1967 3028
1968void 3029void
1969ev_stat_stat (EV_P_ ev_stat *w) 3030ev_stat_stat (EV_P_ ev_stat *w)
1970{ 3031{
… …
1997 || w->prev.st_atime != w->attr.st_atime 3058 || w->prev.st_atime != w->attr.st_atime
1998 || w->prev.st_mtime != w->attr.st_mtime 3059 || w->prev.st_mtime != w->attr.st_mtime
1999 || w->prev.st_ctime != w->attr.st_ctime 3060 || w->prev.st_ctime != w->attr.st_ctime
2000 ) { 3061 ) {
2001 #if EV_USE_INOTIFY 3062 #if EV_USE_INOTIFY
3063 if (fs_fd >= 0)
3064 {
2002 infy_del (EV_A_ w); 3065 infy_del (EV_A_ w);
2003 infy_add (EV_A_ w); 3066 infy_add (EV_A_ w);
2004 ev_stat_stat (EV_A_ w); /* avoid race... */ 3067 ev_stat_stat (EV_A_ w); /* avoid race... */
3068 }
2005 #endif 3069 #endif
2006 3070
2007 ev_feed_event (EV_A_ w, EV_STAT); 3071 ev_feed_event (EV_A_ w, EV_STAT);
2008 } 3072 }
2009} 3073}
… …
2012ev_stat_start (EV_P_ ev_stat *w) 3076ev_stat_start (EV_P_ ev_stat *w)
2013{ 3077{
2014 if (expect_false (ev_is_active (w))) 3078 if (expect_false (ev_is_active (w)))
2015 return; 3079 return;
2016 3080
2017 /* since we use memcmp, we need to clear any padding data etc. */
2018 memset (&w->prev, 0, sizeof (ev_statdata));
2019 memset (&w->attr, 0, sizeof (ev_statdata));
2020
2021 ev_stat_stat (EV_A_ w); 3081 ev_stat_stat (EV_A_ w);
2022 3082
3083 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2023 if (w->interval < MIN_STAT_INTERVAL) 3084 w->interval = MIN_STAT_INTERVAL;
2024 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2025 3085
2026 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3086 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2027 ev_set_priority (&w->timer, ev_priority (w)); 3087 ev_set_priority (&w->timer, ev_priority (w));
2028 3088
2029#if EV_USE_INOTIFY 3089#if EV_USE_INOTIFY
2030 infy_init (EV_A); 3090 infy_init (EV_A);
2031 3091
2032 if (fs_fd >= 0) 3092 if (fs_fd >= 0)
2033 infy_add (EV_A_ w); 3093 infy_add (EV_A_ w);
2034 else 3094 else
2035#endif 3095#endif
2036 ev_timer_start (EV_A_ &w->timer); 3096 ev_timer_again (EV_A_ &w->timer);
2037 3097
2038 ev_start (EV_A_ (W)w, 1); 3098 ev_start (EV_A_ (W)w, 1);
3099
3100 EV_FREQUENT_CHECK;
2039} 3101}
2040 3102
2041void 3103void
2042ev_stat_stop (EV_P_ ev_stat *w) 3104ev_stat_stop (EV_P_ ev_stat *w)
2043{ 3105{
2044 clear_pending (EV_A_ (W)w); 3106 clear_pending (EV_A_ (W)w);
2045 if (expect_false (!ev_is_active (w))) 3107 if (expect_false (!ev_is_active (w)))
2046 return; 3108 return;
2047 3109
3110 EV_FREQUENT_CHECK;
3111
2048#if EV_USE_INOTIFY 3112#if EV_USE_INOTIFY
2049 infy_del (EV_A_ w); 3113 infy_del (EV_A_ w);
2050#endif 3114#endif
2051 ev_timer_stop (EV_A_ &w->timer); 3115 ev_timer_stop (EV_A_ &w->timer);
2052 3116
2053 ev_stop (EV_A_ (W)w); 3117 ev_stop (EV_A_ (W)w);
3118
3119 EV_FREQUENT_CHECK;
2054} 3120}
2055#endif 3121#endif
2056 3122
2057#if EV_IDLE_ENABLE 3123#if EV_IDLE_ENABLE
2058void 3124void
… …
2060{ 3126{
2061 if (expect_false (ev_is_active (w))) 3127 if (expect_false (ev_is_active (w)))
2062 return; 3128 return;
2063 3129
2064 pri_adjust (EV_A_ (W)w); 3130 pri_adjust (EV_A_ (W)w);
3131
3132 EV_FREQUENT_CHECK;
2065 3133
2066 { 3134 {
2067 int active = ++idlecnt [ABSPRI (w)]; 3135 int active = ++idlecnt [ABSPRI (w)];
2068 3136
2069 ++idleall; 3137 ++idleall;
2070 ev_start (EV_A_ (W)w, active); 3138 ev_start (EV_A_ (W)w, active);
2071 3139
2072 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 3140 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2073 idles [ABSPRI (w)][active - 1] = w; 3141 idles [ABSPRI (w)][active - 1] = w;
2074 } 3142 }
3143
3144 EV_FREQUENT_CHECK;
2075} 3145}
2076 3146
2077void 3147void
2078ev_idle_stop (EV_P_ ev_idle *w) 3148ev_idle_stop (EV_P_ ev_idle *w)
2079{ 3149{
2080 clear_pending (EV_A_ (W)w); 3150 clear_pending (EV_A_ (W)w);
2081 if (expect_false (!ev_is_active (w))) 3151 if (expect_false (!ev_is_active (w)))
2082 return; 3152 return;
2083 3153
3154 EV_FREQUENT_CHECK;
3155
2084 { 3156 {
2085 int active = ((W)w)->active; 3157 int active = ev_active (w);
2086 3158
2087 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 3159 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2088 ((W)idles [ABSPRI (w)][active - 1])->active = active; 3160 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2089 3161
2090 ev_stop (EV_A_ (W)w); 3162 ev_stop (EV_A_ (W)w);
2091 --idleall; 3163 --idleall;
2092 } 3164 }
3165
3166 EV_FREQUENT_CHECK;
2093} 3167}
2094#endif 3168#endif
2095 3169
2096void 3170void
2097ev_prepare_start (EV_P_ ev_prepare *w) 3171ev_prepare_start (EV_P_ ev_prepare *w)
2098{ 3172{
2099 if (expect_false (ev_is_active (w))) 3173 if (expect_false (ev_is_active (w)))
2100 return; 3174 return;
3175
3176 EV_FREQUENT_CHECK;
2101 3177
2102 ev_start (EV_A_ (W)w, ++preparecnt); 3178 ev_start (EV_A_ (W)w, ++preparecnt);
2103 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 3179 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2104 prepares [preparecnt - 1] = w; 3180 prepares [preparecnt - 1] = w;
3181
3182 EV_FREQUENT_CHECK;
2105} 3183}
2106 3184
2107void 3185void
2108ev_prepare_stop (EV_P_ ev_prepare *w) 3186ev_prepare_stop (EV_P_ ev_prepare *w)
2109{ 3187{
2110 clear_pending (EV_A_ (W)w); 3188 clear_pending (EV_A_ (W)w);
2111 if (expect_false (!ev_is_active (w))) 3189 if (expect_false (!ev_is_active (w)))
2112 return; 3190 return;
2113 3191
3192 EV_FREQUENT_CHECK;
3193
2114 { 3194 {
2115 int active = ((W)w)->active; 3195 int active = ev_active (w);
3196
2116 prepares [active - 1] = prepares [--preparecnt]; 3197 prepares [active - 1] = prepares [--preparecnt];
2117 ((W)prepares [active - 1])->active = active; 3198 ev_active (prepares [active - 1]) = active;
2118 } 3199 }
2119 3200
2120 ev_stop (EV_A_ (W)w); 3201 ev_stop (EV_A_ (W)w);
3202
3203 EV_FREQUENT_CHECK;
2121} 3204}
2122 3205
2123void 3206void
2124ev_check_start (EV_P_ ev_check *w) 3207ev_check_start (EV_P_ ev_check *w)
2125{ 3208{
2126 if (expect_false (ev_is_active (w))) 3209 if (expect_false (ev_is_active (w)))
2127 return; 3210 return;
3211
3212 EV_FREQUENT_CHECK;
2128 3213
2129 ev_start (EV_A_ (W)w, ++checkcnt); 3214 ev_start (EV_A_ (W)w, ++checkcnt);
2130 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 3215 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2131 checks [checkcnt - 1] = w; 3216 checks [checkcnt - 1] = w;
3217
3218 EV_FREQUENT_CHECK;
2132} 3219}
2133 3220
2134void 3221void
2135ev_check_stop (EV_P_ ev_check *w) 3222ev_check_stop (EV_P_ ev_check *w)
2136{ 3223{
2137 clear_pending (EV_A_ (W)w); 3224 clear_pending (EV_A_ (W)w);
2138 if (expect_false (!ev_is_active (w))) 3225 if (expect_false (!ev_is_active (w)))
2139 return; 3226 return;
2140 3227
3228 EV_FREQUENT_CHECK;
3229
2141 { 3230 {
2142 int active = ((W)w)->active; 3231 int active = ev_active (w);
3232
2143 checks [active - 1] = checks [--checkcnt]; 3233 checks [active - 1] = checks [--checkcnt];
2144 ((W)checks [active - 1])->active = active; 3234 ev_active (checks [active - 1]) = active;
2145 } 3235 }
2146 3236
2147 ev_stop (EV_A_ (W)w); 3237 ev_stop (EV_A_ (W)w);
3238
3239 EV_FREQUENT_CHECK;
2148} 3240}
2149 3241
2150#if EV_EMBED_ENABLE 3242#if EV_EMBED_ENABLE
2151void noinline 3243void noinline
2152ev_embed_sweep (EV_P_ ev_embed *w) 3244ev_embed_sweep (EV_P_ ev_embed *w)
2153{ 3245{
2154 ev_loop (w->loop, EVLOOP_NONBLOCK); 3246 ev_loop (w->other, EVLOOP_NONBLOCK);
2155} 3247}
2156 3248
2157static void 3249static void
2158embed_cb (EV_P_ ev_io *io, int revents) 3250embed_io_cb (EV_P_ ev_io *io, int revents)
2159{ 3251{
2160 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3252 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2161 3253
2162 if (ev_cb (w)) 3254 if (ev_cb (w))
2163 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3255 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2164 else 3256 else
2165 ev_embed_sweep (loop, w); 3257 ev_loop (w->other, EVLOOP_NONBLOCK);
2166} 3258}
3259
3260static void
3261embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3262{
3263 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3264
3265 {
3266 EV_P = w->other;
3267
3268 while (fdchangecnt)
3269 {
3270 fd_reify (EV_A);
3271 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3272 }
3273 }
3274}
3275
3276static void
3277embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3278{
3279 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3280
3281 ev_embed_stop (EV_A_ w);
3282
3283 {
3284 EV_P = w->other;
3285
3286 ev_loop_fork (EV_A);
3287 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3288 }
3289
3290 ev_embed_start (EV_A_ w);
3291}
3292
3293#if 0
3294static void
3295embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3296{
3297 ev_idle_stop (EV_A_ idle);
3298}
3299#endif
2167 3300
2168void 3301void
2169ev_embed_start (EV_P_ ev_embed *w) 3302ev_embed_start (EV_P_ ev_embed *w)
2170{ 3303{
2171 if (expect_false (ev_is_active (w))) 3304 if (expect_false (ev_is_active (w)))
2172 return; 3305 return;
2173 3306
2174 { 3307 {
2175 struct ev_loop *loop = w->loop; 3308 EV_P = w->other;
2176 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 3309 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2177 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 3310 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2178 } 3311 }
3312
3313 EV_FREQUENT_CHECK;
2179 3314
2180 ev_set_priority (&w->io, ev_priority (w)); 3315 ev_set_priority (&w->io, ev_priority (w));
2181 ev_io_start (EV_A_ &w->io); 3316 ev_io_start (EV_A_ &w->io);
2182 3317
3318 ev_prepare_init (&w->prepare, embed_prepare_cb);
3319 ev_set_priority (&w->prepare, EV_MINPRI);
3320 ev_prepare_start (EV_A_ &w->prepare);
3321
3322 ev_fork_init (&w->fork, embed_fork_cb);
3323 ev_fork_start (EV_A_ &w->fork);
3324
3325 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3326
2183 ev_start (EV_A_ (W)w, 1); 3327 ev_start (EV_A_ (W)w, 1);
3328
3329 EV_FREQUENT_CHECK;
2184} 3330}
2185 3331
2186void 3332void
2187ev_embed_stop (EV_P_ ev_embed *w) 3333ev_embed_stop (EV_P_ ev_embed *w)
2188{ 3334{
2189 clear_pending (EV_A_ (W)w); 3335 clear_pending (EV_A_ (W)w);
2190 if (expect_false (!ev_is_active (w))) 3336 if (expect_false (!ev_is_active (w)))
2191 return; 3337 return;
2192 3338
3339 EV_FREQUENT_CHECK;
3340
2193 ev_io_stop (EV_A_ &w->io); 3341 ev_io_stop (EV_A_ &w->io);
3342 ev_prepare_stop (EV_A_ &w->prepare);
3343 ev_fork_stop (EV_A_ &w->fork);
2194 3344
2195 ev_stop (EV_A_ (W)w); 3345 EV_FREQUENT_CHECK;
2196} 3346}
2197#endif 3347#endif
2198 3348
2199#if EV_FORK_ENABLE 3349#if EV_FORK_ENABLE
2200void 3350void
2201ev_fork_start (EV_P_ ev_fork *w) 3351ev_fork_start (EV_P_ ev_fork *w)
2202{ 3352{
2203 if (expect_false (ev_is_active (w))) 3353 if (expect_false (ev_is_active (w)))
2204 return; 3354 return;
3355
3356 EV_FREQUENT_CHECK;
2205 3357
2206 ev_start (EV_A_ (W)w, ++forkcnt); 3358 ev_start (EV_A_ (W)w, ++forkcnt);
2207 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 3359 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2208 forks [forkcnt - 1] = w; 3360 forks [forkcnt - 1] = w;
3361
3362 EV_FREQUENT_CHECK;
2209} 3363}
2210 3364
2211void 3365void
2212ev_fork_stop (EV_P_ ev_fork *w) 3366ev_fork_stop (EV_P_ ev_fork *w)
2213{ 3367{
2214 clear_pending (EV_A_ (W)w); 3368 clear_pending (EV_A_ (W)w);
2215 if (expect_false (!ev_is_active (w))) 3369 if (expect_false (!ev_is_active (w)))
2216 return; 3370 return;
2217 3371
3372 EV_FREQUENT_CHECK;
3373
2218 { 3374 {
2219 int active = ((W)w)->active; 3375 int active = ev_active (w);
3376
2220 forks [active - 1] = forks [--forkcnt]; 3377 forks [active - 1] = forks [--forkcnt];
2221 ((W)forks [active - 1])->active = active; 3378 ev_active (forks [active - 1]) = active;
2222 } 3379 }
2223 3380
2224 ev_stop (EV_A_ (W)w); 3381 ev_stop (EV_A_ (W)w);
3382
3383 EV_FREQUENT_CHECK;
3384}
3385#endif
3386
3387#if EV_ASYNC_ENABLE
3388void
3389ev_async_start (EV_P_ ev_async *w)
3390{
3391 if (expect_false (ev_is_active (w)))
3392 return;
3393
3394 evpipe_init (EV_A);
3395
3396 EV_FREQUENT_CHECK;
3397
3398 ev_start (EV_A_ (W)w, ++asynccnt);
3399 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3400 asyncs [asynccnt - 1] = w;
3401
3402 EV_FREQUENT_CHECK;
3403}
3404
3405void
3406ev_async_stop (EV_P_ ev_async *w)
3407{
3408 clear_pending (EV_A_ (W)w);
3409 if (expect_false (!ev_is_active (w)))
3410 return;
3411
3412 EV_FREQUENT_CHECK;
3413
3414 {
3415 int active = ev_active (w);
3416
3417 asyncs [active - 1] = asyncs [--asynccnt];
3418 ev_active (asyncs [active - 1]) = active;
3419 }
3420
3421 ev_stop (EV_A_ (W)w);
3422
3423 EV_FREQUENT_CHECK;
3424}
3425
3426void
3427ev_async_send (EV_P_ ev_async *w)
3428{
3429 w->sent = 1;
3430 evpipe_write (EV_A_ &async_pending);
2225} 3431}
2226#endif 3432#endif
2227 3433
2228/*****************************************************************************/ 3434/*****************************************************************************/
2229 3435
… …
2239once_cb (EV_P_ struct ev_once *once, int revents) 3445once_cb (EV_P_ struct ev_once *once, int revents)
2240{ 3446{
2241 void (*cb)(int revents, void *arg) = once->cb; 3447 void (*cb)(int revents, void *arg) = once->cb;
2242 void *arg = once->arg; 3448 void *arg = once->arg;
2243 3449
2244 ev_io_stop (EV_A_ &once->io); 3450 ev_io_stop (EV_A_ &once->io);
2245 ev_timer_stop (EV_A_ &once->to); 3451 ev_timer_stop (EV_A_ &once->to);
2246 ev_free (once); 3452 ev_free (once);
2247 3453
2248 cb (revents, arg); 3454 cb (revents, arg);
2249} 3455}
2250 3456
2251static void 3457static void
2252once_cb_io (EV_P_ ev_io *w, int revents) 3458once_cb_io (EV_P_ ev_io *w, int revents)
2253{ 3459{
2254 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3460 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3461
3462 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2255} 3463}
2256 3464
2257static void 3465static void
2258once_cb_to (EV_P_ ev_timer *w, int revents) 3466once_cb_to (EV_P_ ev_timer *w, int revents)
2259{ 3467{
2260 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3468 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3469
3470 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2261} 3471}
2262 3472
2263void 3473void
2264ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3474ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2265{ 3475{
… …
2287 ev_timer_set (&once->to, timeout, 0.); 3497 ev_timer_set (&once->to, timeout, 0.);
2288 ev_timer_start (EV_A_ &once->to); 3498 ev_timer_start (EV_A_ &once->to);
2289 } 3499 }
2290} 3500}
2291 3501
3502/*****************************************************************************/
3503
3504#if EV_WALK_ENABLE
3505void
3506ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3507{
3508 int i, j;
3509 ev_watcher_list *wl, *wn;
3510
3511 if (types & (EV_IO | EV_EMBED))
3512 for (i = 0; i < anfdmax; ++i)
3513 for (wl = anfds [i].head; wl; )
3514 {
3515 wn = wl->next;
3516
3517#if EV_EMBED_ENABLE
3518 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3519 {
3520 if (types & EV_EMBED)
3521 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3522 }
3523 else
3524#endif
3525#if EV_USE_INOTIFY
3526 if (ev_cb ((ev_io *)wl) == infy_cb)
3527 ;
3528 else
3529#endif
3530 if ((ev_io *)wl != &pipe_w)
3531 if (types & EV_IO)
3532 cb (EV_A_ EV_IO, wl);
3533
3534 wl = wn;
3535 }
3536
3537 if (types & (EV_TIMER | EV_STAT))
3538 for (i = timercnt + HEAP0; i-- > HEAP0; )
3539#if EV_STAT_ENABLE
3540 /*TODO: timer is not always active*/
3541 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3542 {
3543 if (types & EV_STAT)
3544 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3545 }
3546 else
3547#endif
3548 if (types & EV_TIMER)
3549 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3550
3551#if EV_PERIODIC_ENABLE
3552 if (types & EV_PERIODIC)
3553 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3554 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3555#endif
3556
3557#if EV_IDLE_ENABLE
3558 if (types & EV_IDLE)
3559 for (j = NUMPRI; i--; )
3560 for (i = idlecnt [j]; i--; )
3561 cb (EV_A_ EV_IDLE, idles [j][i]);
3562#endif
3563
3564#if EV_FORK_ENABLE
3565 if (types & EV_FORK)
3566 for (i = forkcnt; i--; )
3567 if (ev_cb (forks [i]) != embed_fork_cb)
3568 cb (EV_A_ EV_FORK, forks [i]);
3569#endif
3570
3571#if EV_ASYNC_ENABLE
3572 if (types & EV_ASYNC)
3573 for (i = asynccnt; i--; )
3574 cb (EV_A_ EV_ASYNC, asyncs [i]);
3575#endif
3576
3577 if (types & EV_PREPARE)
3578 for (i = preparecnt; i--; )
3579#if EV_EMBED_ENABLE
3580 if (ev_cb (prepares [i]) != embed_prepare_cb)
3581#endif
3582 cb (EV_A_ EV_PREPARE, prepares [i]);
3583
3584 if (types & EV_CHECK)
3585 for (i = checkcnt; i--; )
3586 cb (EV_A_ EV_CHECK, checks [i]);
3587
3588 if (types & EV_SIGNAL)
3589 for (i = 0; i < EV_NSIG - 1; ++i)
3590 for (wl = signals [i].head; wl; )
3591 {
3592 wn = wl->next;
3593 cb (EV_A_ EV_SIGNAL, wl);
3594 wl = wn;
3595 }
3596
3597 if (types & EV_CHILD)
3598 for (i = EV_PID_HASHSIZE; i--; )
3599 for (wl = childs [i]; wl; )
3600 {
3601 wn = wl->next;
3602 cb (EV_A_ EV_CHILD, wl);
3603 wl = wn;
3604 }
3605/* EV_STAT 0x00001000 /* stat data changed */
3606/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3607}
3608#endif
3609
3610#if EV_MULTIPLICITY
3611 #include "ev_wrap.h"
3612#endif
3613
2292#ifdef __cplusplus 3614#ifdef __cplusplus
2293} 3615}
2294#endif 3616#endif
2295 3617

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