ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libev/ev.c
(Generate patch)

Comparing libev/ev.c (file contents):
Revision 1.127 by root, Sun Nov 18 02:17:57 2007 UTC vs.
Revision 1.268 by root, Mon Oct 27 13:39:18 2008 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
31 39
32#ifdef __cplusplus 40#ifdef __cplusplus
33extern "C" { 41extern "C" {
34#endif 42#endif
35 43
44/* this big block deduces configuration from config.h */
36#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
37# include "config.h" 49# include "config.h"
50# endif
38 51
39# if HAVE_CLOCK_GETTIME 52# if HAVE_CLOCK_GETTIME
40# ifndef EV_USE_MONOTONIC 53# ifndef EV_USE_MONOTONIC
41# define EV_USE_MONOTONIC 1 54# define EV_USE_MONOTONIC 1
42# endif 55# endif
… …
47# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
48# define EV_USE_MONOTONIC 0 61# define EV_USE_MONOTONIC 0
49# endif 62# endif
50# ifndef EV_USE_REALTIME 63# ifndef EV_USE_REALTIME
51# define EV_USE_REALTIME 0 64# define EV_USE_REALTIME 0
65# endif
66# endif
67
68# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
70# define EV_USE_NANOSLEEP 1
71# else
72# define EV_USE_NANOSLEEP 0
52# endif 73# endif
53# endif 74# endif
54 75
55# ifndef EV_USE_SELECT 76# ifndef EV_USE_SELECT
56# if HAVE_SELECT && HAVE_SYS_SELECT_H 77# if HAVE_SELECT && HAVE_SYS_SELECT_H
… …
90# else 111# else
91# define EV_USE_PORT 0 112# define EV_USE_PORT 0
92# endif 113# endif
93# endif 114# endif
94 115
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1
119# else
120# define EV_USE_INOTIFY 0
121# endif
122# endif
123
124# ifndef EV_USE_EVENTFD
125# if HAVE_EVENTFD
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif
130# endif
131
95#endif 132#endif
96 133
97#include <math.h> 134#include <math.h>
98#include <stdlib.h> 135#include <stdlib.h>
99#include <fcntl.h> 136#include <fcntl.h>
… …
106#include <sys/types.h> 143#include <sys/types.h>
107#include <time.h> 144#include <time.h>
108 145
109#include <signal.h> 146#include <signal.h>
110 147
148#ifdef EV_H
149# include EV_H
150#else
151# include "ev.h"
152#endif
153
111#ifndef _WIN32 154#ifndef _WIN32
112# include <unistd.h>
113# include <sys/time.h> 155# include <sys/time.h>
114# include <sys/wait.h> 156# include <sys/wait.h>
157# include <unistd.h>
115#else 158#else
159# include <io.h>
116# define WIN32_LEAN_AND_MEAN 160# define WIN32_LEAN_AND_MEAN
117# include <windows.h> 161# include <windows.h>
118# ifndef EV_SELECT_IS_WINSOCKET 162# ifndef EV_SELECT_IS_WINSOCKET
119# define EV_SELECT_IS_WINSOCKET 1 163# define EV_SELECT_IS_WINSOCKET 1
120# endif 164# endif
121#endif 165#endif
122 166
123/**/ 167/* this block tries to deduce configuration from header-defined symbols and defaults */
124 168
125#ifndef EV_USE_MONOTONIC 169#ifndef EV_USE_MONOTONIC
170# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
171# define EV_USE_MONOTONIC 1
172# else
126# define EV_USE_MONOTONIC 0 173# define EV_USE_MONOTONIC 0
174# endif
127#endif 175#endif
128 176
129#ifndef EV_USE_REALTIME 177#ifndef EV_USE_REALTIME
130# define EV_USE_REALTIME 0 178# define EV_USE_REALTIME 0
179#endif
180
181#ifndef EV_USE_NANOSLEEP
182# if _POSIX_C_SOURCE >= 199309L
183# define EV_USE_NANOSLEEP 1
184# else
185# define EV_USE_NANOSLEEP 0
186# endif
131#endif 187#endif
132 188
133#ifndef EV_USE_SELECT 189#ifndef EV_USE_SELECT
134# define EV_USE_SELECT 1 190# define EV_USE_SELECT 1
135#endif 191#endif
… …
141# define EV_USE_POLL 1 197# define EV_USE_POLL 1
142# endif 198# endif
143#endif 199#endif
144 200
145#ifndef EV_USE_EPOLL 201#ifndef EV_USE_EPOLL
202# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
203# define EV_USE_EPOLL 1
204# else
146# define EV_USE_EPOLL 0 205# define EV_USE_EPOLL 0
206# endif
147#endif 207#endif
148 208
149#ifndef EV_USE_KQUEUE 209#ifndef EV_USE_KQUEUE
150# define EV_USE_KQUEUE 0 210# define EV_USE_KQUEUE 0
151#endif 211#endif
152 212
153#ifndef EV_USE_PORT 213#ifndef EV_USE_PORT
154# define EV_USE_PORT 0 214# define EV_USE_PORT 0
155#endif 215#endif
156 216
157/**/ 217#ifndef EV_USE_INOTIFY
158 218# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
159/* darwin simply cannot be helped */ 219# define EV_USE_INOTIFY 1
160#ifdef __APPLE__ 220# else
161# undef EV_USE_POLL 221# define EV_USE_INOTIFY 0
162# undef EV_USE_KQUEUE
163#endif 222# endif
223#endif
224
225#ifndef EV_PID_HASHSIZE
226# if EV_MINIMAL
227# define EV_PID_HASHSIZE 1
228# else
229# define EV_PID_HASHSIZE 16
230# endif
231#endif
232
233#ifndef EV_INOTIFY_HASHSIZE
234# if EV_MINIMAL
235# define EV_INOTIFY_HASHSIZE 1
236# else
237# define EV_INOTIFY_HASHSIZE 16
238# endif
239#endif
240
241#ifndef EV_USE_EVENTFD
242# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
243# define EV_USE_EVENTFD 1
244# else
245# define EV_USE_EVENTFD 0
246# endif
247#endif
248
249#if 0 /* debugging */
250# define EV_VERIFY 3
251# define EV_USE_4HEAP 1
252# define EV_HEAP_CACHE_AT 1
253#endif
254
255#ifndef EV_VERIFY
256# define EV_VERIFY !EV_MINIMAL
257#endif
258
259#ifndef EV_USE_4HEAP
260# define EV_USE_4HEAP !EV_MINIMAL
261#endif
262
263#ifndef EV_HEAP_CACHE_AT
264# define EV_HEAP_CACHE_AT !EV_MINIMAL
265#endif
266
267/* this block fixes any misconfiguration where we know we run into trouble otherwise */
164 268
165#ifndef CLOCK_MONOTONIC 269#ifndef CLOCK_MONOTONIC
166# undef EV_USE_MONOTONIC 270# undef EV_USE_MONOTONIC
167# define EV_USE_MONOTONIC 0 271# define EV_USE_MONOTONIC 0
168#endif 272#endif
… …
170#ifndef CLOCK_REALTIME 274#ifndef CLOCK_REALTIME
171# undef EV_USE_REALTIME 275# undef EV_USE_REALTIME
172# define EV_USE_REALTIME 0 276# define EV_USE_REALTIME 0
173#endif 277#endif
174 278
279#if !EV_STAT_ENABLE
280# undef EV_USE_INOTIFY
281# define EV_USE_INOTIFY 0
282#endif
283
284#if !EV_USE_NANOSLEEP
285# ifndef _WIN32
286# include <sys/select.h>
287# endif
288#endif
289
290#if EV_USE_INOTIFY
291# include <sys/utsname.h>
292# include <sys/inotify.h>
293/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
294# ifndef IN_DONT_FOLLOW
295# undef EV_USE_INOTIFY
296# define EV_USE_INOTIFY 0
297# endif
298#endif
299
175#if EV_SELECT_IS_WINSOCKET 300#if EV_SELECT_IS_WINSOCKET
176# include <winsock.h> 301# include <winsock.h>
177#endif 302#endif
178 303
304#if EV_USE_EVENTFD
305/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
306# include <stdint.h>
307# ifdef __cplusplus
308extern "C" {
309# endif
310int eventfd (unsigned int initval, int flags);
311# ifdef __cplusplus
312}
313# endif
314#endif
315
179/**/ 316/**/
317
318#if EV_VERIFY >= 3
319# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
320#else
321# define EV_FREQUENT_CHECK do { } while (0)
322#endif
323
324/*
325 * This is used to avoid floating point rounding problems.
326 * It is added to ev_rt_now when scheduling periodics
327 * to ensure progress, time-wise, even when rounding
328 * errors are against us.
329 * This value is good at least till the year 4000.
330 * Better solutions welcome.
331 */
332#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
180 333
181#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 334#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
182#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 335#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
183#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
184/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */ 336/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
185 337
186#ifdef EV_H
187# include EV_H
188#else
189# include "ev.h"
190#endif
191
192#if __GNUC__ >= 3 338#if __GNUC__ >= 4
193# define expect(expr,value) __builtin_expect ((expr),(value)) 339# define expect(expr,value) __builtin_expect ((expr),(value))
194# define inline static inline 340# define noinline __attribute__ ((noinline))
195#else 341#else
196# define expect(expr,value) (expr) 342# define expect(expr,value) (expr)
197# define inline static 343# define noinline
344# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
345# define inline
346# endif
198#endif 347#endif
199 348
200#define expect_false(expr) expect ((expr) != 0, 0) 349#define expect_false(expr) expect ((expr) != 0, 0)
201#define expect_true(expr) expect ((expr) != 0, 1) 350#define expect_true(expr) expect ((expr) != 0, 1)
351#define inline_size static inline
352
353#if EV_MINIMAL
354# define inline_speed static noinline
355#else
356# define inline_speed static inline
357#endif
202 358
203#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 359#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
204#define ABSPRI(w) ((w)->priority - EV_MINPRI) 360#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
205 361
206#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ 362#define EMPTY /* required for microsofts broken pseudo-c compiler */
207#define EMPTY2(a,b) /* used to suppress some warnings */ 363#define EMPTY2(a,b) /* used to suppress some warnings */
208 364
209typedef struct ev_watcher *W; 365typedef ev_watcher *W;
210typedef struct ev_watcher_list *WL; 366typedef ev_watcher_list *WL;
211typedef struct ev_watcher_time *WT; 367typedef ev_watcher_time *WT;
212 368
369#define ev_active(w) ((W)(w))->active
370#define ev_at(w) ((WT)(w))->at
371
372#if EV_USE_MONOTONIC
373/* sig_atomic_t is used to avoid per-thread variables or locking but still */
374/* giving it a reasonably high chance of working on typical architetcures */
213static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 375static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
376#endif
214 377
215#ifdef _WIN32 378#ifdef _WIN32
216# include "ev_win32.c" 379# include "ev_win32.c"
217#endif 380#endif
218 381
219/*****************************************************************************/ 382/*****************************************************************************/
220 383
221static void (*syserr_cb)(const char *msg); 384static void (*syserr_cb)(const char *msg);
222 385
386void
223void ev_set_syserr_cb (void (*cb)(const char *msg)) 387ev_set_syserr_cb (void (*cb)(const char *msg))
224{ 388{
225 syserr_cb = cb; 389 syserr_cb = cb;
226} 390}
227 391
228static void 392static void noinline
229syserr (const char *msg) 393syserr (const char *msg)
230{ 394{
231 if (!msg) 395 if (!msg)
232 msg = "(libev) system error"; 396 msg = "(libev) system error";
233 397
… …
238 perror (msg); 402 perror (msg);
239 abort (); 403 abort ();
240 } 404 }
241} 405}
242 406
407static void *
408ev_realloc_emul (void *ptr, long size)
409{
410 /* some systems, notably openbsd and darwin, fail to properly
411 * implement realloc (x, 0) (as required by both ansi c-98 and
412 * the single unix specification, so work around them here.
413 */
414
415 if (size)
416 return realloc (ptr, size);
417
418 free (ptr);
419 return 0;
420}
421
243static void *(*alloc)(void *ptr, long size); 422static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
244 423
424void
245void ev_set_allocator (void *(*cb)(void *ptr, long size)) 425ev_set_allocator (void *(*cb)(void *ptr, long size))
246{ 426{
247 alloc = cb; 427 alloc = cb;
248} 428}
249 429
250static void * 430inline_speed void *
251ev_realloc (void *ptr, long size) 431ev_realloc (void *ptr, long size)
252{ 432{
253 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 433 ptr = alloc (ptr, size);
254 434
255 if (!ptr && size) 435 if (!ptr && size)
256 { 436 {
257 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 437 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
258 abort (); 438 abort ();
… …
269typedef struct 449typedef struct
270{ 450{
271 WL head; 451 WL head;
272 unsigned char events; 452 unsigned char events;
273 unsigned char reify; 453 unsigned char reify;
454 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
455 unsigned char egen; /* generation counter to counter epoll bugs */
274#if EV_SELECT_IS_WINSOCKET 456#if EV_SELECT_IS_WINSOCKET
275 SOCKET handle; 457 SOCKET handle;
276#endif 458#endif
277} ANFD; 459} ANFD;
278 460
279typedef struct 461typedef struct
280{ 462{
281 W w; 463 W w;
282 int events; 464 int events;
283} ANPENDING; 465} ANPENDING;
466
467#if EV_USE_INOTIFY
468/* hash table entry per inotify-id */
469typedef struct
470{
471 WL head;
472} ANFS;
473#endif
474
475/* Heap Entry */
476#if EV_HEAP_CACHE_AT
477 typedef struct {
478 ev_tstamp at;
479 WT w;
480 } ANHE;
481
482 #define ANHE_w(he) (he).w /* access watcher, read-write */
483 #define ANHE_at(he) (he).at /* access cached at, read-only */
484 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
485#else
486 typedef WT ANHE;
487
488 #define ANHE_w(he) (he)
489 #define ANHE_at(he) (he)->at
490 #define ANHE_at_cache(he)
491#endif
284 492
285#if EV_MULTIPLICITY 493#if EV_MULTIPLICITY
286 494
287 struct ev_loop 495 struct ev_loop
288 { 496 {
… …
322 gettimeofday (&tv, 0); 530 gettimeofday (&tv, 0);
323 return tv.tv_sec + tv.tv_usec * 1e-6; 531 return tv.tv_sec + tv.tv_usec * 1e-6;
324#endif 532#endif
325} 533}
326 534
327inline ev_tstamp 535ev_tstamp inline_size
328get_clock (void) 536get_clock (void)
329{ 537{
330#if EV_USE_MONOTONIC 538#if EV_USE_MONOTONIC
331 if (expect_true (have_monotonic)) 539 if (expect_true (have_monotonic))
332 { 540 {
… …
345{ 553{
346 return ev_rt_now; 554 return ev_rt_now;
347} 555}
348#endif 556#endif
349 557
350#define array_roundsize(type,n) (((n) | 4) & ~3) 558void
559ev_sleep (ev_tstamp delay)
560{
561 if (delay > 0.)
562 {
563#if EV_USE_NANOSLEEP
564 struct timespec ts;
565
566 ts.tv_sec = (time_t)delay;
567 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
568
569 nanosleep (&ts, 0);
570#elif defined(_WIN32)
571 Sleep ((unsigned long)(delay * 1e3));
572#else
573 struct timeval tv;
574
575 tv.tv_sec = (time_t)delay;
576 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
577
578 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
579 /* somehting nto guaranteed by newer posix versions, but guaranteed */
580 /* by older ones */
581 select (0, 0, 0, 0, &tv);
582#endif
583 }
584}
585
586/*****************************************************************************/
587
588#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
589
590int inline_size
591array_nextsize (int elem, int cur, int cnt)
592{
593 int ncur = cur + 1;
594
595 do
596 ncur <<= 1;
597 while (cnt > ncur);
598
599 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
600 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
601 {
602 ncur *= elem;
603 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
604 ncur = ncur - sizeof (void *) * 4;
605 ncur /= elem;
606 }
607
608 return ncur;
609}
610
611static noinline void *
612array_realloc (int elem, void *base, int *cur, int cnt)
613{
614 *cur = array_nextsize (elem, *cur, cnt);
615 return ev_realloc (base, elem * *cur);
616}
617
618#define array_init_zero(base,count) \
619 memset ((void *)(base), 0, sizeof (*(base)) * (count))
351 620
352#define array_needsize(type,base,cur,cnt,init) \ 621#define array_needsize(type,base,cur,cnt,init) \
353 if (expect_false ((cnt) > cur)) \ 622 if (expect_false ((cnt) > (cur))) \
354 { \ 623 { \
355 int newcnt = cur; \ 624 int ocur_ = (cur); \
356 do \ 625 (base) = (type *)array_realloc \
357 { \ 626 (sizeof (type), (base), &(cur), (cnt)); \
358 newcnt = array_roundsize (type, newcnt << 1); \ 627 init ((base) + (ocur_), (cur) - ocur_); \
359 } \
360 while ((cnt) > newcnt); \
361 \
362 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
363 init (base + cur, newcnt - cur); \
364 cur = newcnt; \
365 } 628 }
366 629
630#if 0
367#define array_slim(type,stem) \ 631#define array_slim(type,stem) \
368 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 632 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
369 { \ 633 { \
370 stem ## max = array_roundsize (stem ## cnt >> 1); \ 634 stem ## max = array_roundsize (stem ## cnt >> 1); \
371 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 635 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
372 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 636 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
373 } 637 }
638#endif
374 639
375#define array_free(stem, idx) \ 640#define array_free(stem, idx) \
376 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 641 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
377 642
378/*****************************************************************************/ 643/*****************************************************************************/
379 644
380static void 645void noinline
381anfds_init (ANFD *base, int count)
382{
383 while (count--)
384 {
385 base->head = 0;
386 base->events = EV_NONE;
387 base->reify = 0;
388
389 ++base;
390 }
391}
392
393void
394ev_feed_event (EV_P_ void *w, int revents) 646ev_feed_event (EV_P_ void *w, int revents)
395{ 647{
396 W w_ = (W)w; 648 W w_ = (W)w;
649 int pri = ABSPRI (w_);
397 650
398 if (expect_false (w_->pending)) 651 if (expect_false (w_->pending))
652 pendings [pri][w_->pending - 1].events |= revents;
653 else
399 { 654 {
655 w_->pending = ++pendingcnt [pri];
656 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
657 pendings [pri][w_->pending - 1].w = w_;
400 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 658 pendings [pri][w_->pending - 1].events = revents;
401 return;
402 } 659 }
403
404 w_->pending = ++pendingcnt [ABSPRI (w_)];
405 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
406 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
407 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
408} 660}
409 661
410static void 662void inline_speed
411queue_events (EV_P_ W *events, int eventcnt, int type) 663queue_events (EV_P_ W *events, int eventcnt, int type)
412{ 664{
413 int i; 665 int i;
414 666
415 for (i = 0; i < eventcnt; ++i) 667 for (i = 0; i < eventcnt; ++i)
416 ev_feed_event (EV_A_ events [i], type); 668 ev_feed_event (EV_A_ events [i], type);
417} 669}
418 670
419inline void 671/*****************************************************************************/
672
673void inline_speed
420fd_event (EV_P_ int fd, int revents) 674fd_event (EV_P_ int fd, int revents)
421{ 675{
422 ANFD *anfd = anfds + fd; 676 ANFD *anfd = anfds + fd;
423 struct ev_io *w; 677 ev_io *w;
424 678
425 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 679 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
426 { 680 {
427 int ev = w->events & revents; 681 int ev = w->events & revents;
428 682
429 if (ev) 683 if (ev)
430 ev_feed_event (EV_A_ (W)w, ev); 684 ev_feed_event (EV_A_ (W)w, ev);
… …
432} 686}
433 687
434void 688void
435ev_feed_fd_event (EV_P_ int fd, int revents) 689ev_feed_fd_event (EV_P_ int fd, int revents)
436{ 690{
691 if (fd >= 0 && fd < anfdmax)
437 fd_event (EV_A_ fd, revents); 692 fd_event (EV_A_ fd, revents);
438} 693}
439 694
440/*****************************************************************************/ 695void inline_size
441
442inline void
443fd_reify (EV_P) 696fd_reify (EV_P)
444{ 697{
445 int i; 698 int i;
446 699
447 for (i = 0; i < fdchangecnt; ++i) 700 for (i = 0; i < fdchangecnt; ++i)
448 { 701 {
449 int fd = fdchanges [i]; 702 int fd = fdchanges [i];
450 ANFD *anfd = anfds + fd; 703 ANFD *anfd = anfds + fd;
451 struct ev_io *w; 704 ev_io *w;
452 705
453 int events = 0; 706 unsigned char events = 0;
454 707
455 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 708 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
456 events |= w->events; 709 events |= (unsigned char)w->events;
457 710
458#if EV_SELECT_IS_WINSOCKET 711#if EV_SELECT_IS_WINSOCKET
459 if (events) 712 if (events)
460 { 713 {
461 unsigned long argp; 714 unsigned long arg;
715 #ifdef EV_FD_TO_WIN32_HANDLE
716 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
717 #else
462 anfd->handle = _get_osfhandle (fd); 718 anfd->handle = _get_osfhandle (fd);
719 #endif
463 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 720 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
464 } 721 }
465#endif 722#endif
466 723
724 {
725 unsigned char o_events = anfd->events;
726 unsigned char o_reify = anfd->reify;
727
467 anfd->reify = 0; 728 anfd->reify = 0;
468
469 method_modify (EV_A_ fd, anfd->events, events);
470 anfd->events = events; 729 anfd->events = events;
730
731 if (o_events != events || o_reify & EV_IOFDSET)
732 backend_modify (EV_A_ fd, o_events, events);
733 }
471 } 734 }
472 735
473 fdchangecnt = 0; 736 fdchangecnt = 0;
474} 737}
475 738
476static void 739void inline_size
477fd_change (EV_P_ int fd) 740fd_change (EV_P_ int fd, int flags)
478{ 741{
479 if (expect_false (anfds [fd].reify)) 742 unsigned char reify = anfds [fd].reify;
480 return;
481
482 anfds [fd].reify = 1; 743 anfds [fd].reify |= flags;
483 744
745 if (expect_true (!reify))
746 {
484 ++fdchangecnt; 747 ++fdchangecnt;
485 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 748 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
486 fdchanges [fdchangecnt - 1] = fd; 749 fdchanges [fdchangecnt - 1] = fd;
750 }
487} 751}
488 752
489static void 753void inline_speed
490fd_kill (EV_P_ int fd) 754fd_kill (EV_P_ int fd)
491{ 755{
492 struct ev_io *w; 756 ev_io *w;
493 757
494 while ((w = (struct ev_io *)anfds [fd].head)) 758 while ((w = (ev_io *)anfds [fd].head))
495 { 759 {
496 ev_io_stop (EV_A_ w); 760 ev_io_stop (EV_A_ w);
497 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 761 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
498 } 762 }
499} 763}
500 764
501inline int 765int inline_size
502fd_valid (int fd) 766fd_valid (int fd)
503{ 767{
504#ifdef _WIN32 768#ifdef _WIN32
505 return _get_osfhandle (fd) != -1; 769 return _get_osfhandle (fd) != -1;
506#else 770#else
507 return fcntl (fd, F_GETFD) != -1; 771 return fcntl (fd, F_GETFD) != -1;
508#endif 772#endif
509} 773}
510 774
511/* called on EBADF to verify fds */ 775/* called on EBADF to verify fds */
512static void 776static void noinline
513fd_ebadf (EV_P) 777fd_ebadf (EV_P)
514{ 778{
515 int fd; 779 int fd;
516 780
517 for (fd = 0; fd < anfdmax; ++fd) 781 for (fd = 0; fd < anfdmax; ++fd)
518 if (anfds [fd].events) 782 if (anfds [fd].events)
519 if (!fd_valid (fd) == -1 && errno == EBADF) 783 if (!fd_valid (fd) && errno == EBADF)
520 fd_kill (EV_A_ fd); 784 fd_kill (EV_A_ fd);
521} 785}
522 786
523/* called on ENOMEM in select/poll to kill some fds and retry */ 787/* called on ENOMEM in select/poll to kill some fds and retry */
524static void 788static void noinline
525fd_enomem (EV_P) 789fd_enomem (EV_P)
526{ 790{
527 int fd; 791 int fd;
528 792
529 for (fd = anfdmax; fd--; ) 793 for (fd = anfdmax; fd--; )
… …
532 fd_kill (EV_A_ fd); 796 fd_kill (EV_A_ fd);
533 return; 797 return;
534 } 798 }
535} 799}
536 800
537/* usually called after fork if method needs to re-arm all fds from scratch */ 801/* usually called after fork if backend needs to re-arm all fds from scratch */
538static void 802static void noinline
539fd_rearm_all (EV_P) 803fd_rearm_all (EV_P)
540{ 804{
541 int fd; 805 int fd;
542 806
543 /* this should be highly optimised to not do anything but set a flag */
544 for (fd = 0; fd < anfdmax; ++fd) 807 for (fd = 0; fd < anfdmax; ++fd)
545 if (anfds [fd].events) 808 if (anfds [fd].events)
546 { 809 {
547 anfds [fd].events = 0; 810 anfds [fd].events = 0;
811 anfds [fd].emask = 0;
548 fd_change (EV_A_ fd); 812 fd_change (EV_A_ fd, EV_IOFDSET | 1);
549 } 813 }
550} 814}
551 815
552/*****************************************************************************/ 816/*****************************************************************************/
553 817
554static void 818/*
555upheap (WT *heap, int k) 819 * the heap functions want a real array index. array index 0 uis guaranteed to not
556{ 820 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
557 WT w = heap [k]; 821 * the branching factor of the d-tree.
822 */
558 823
559 while (k && heap [k >> 1]->at > w->at) 824/*
560 { 825 * at the moment we allow libev the luxury of two heaps,
561 heap [k] = heap [k >> 1]; 826 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
562 ((W)heap [k])->active = k + 1; 827 * which is more cache-efficient.
563 k >>= 1; 828 * the difference is about 5% with 50000+ watchers.
564 } 829 */
830#if EV_USE_4HEAP
565 831
566 heap [k] = w; 832#define DHEAP 4
567 ((W)heap [k])->active = k + 1; 833#define HEAP0 (DHEAP - 1) /* index of first element in heap */
834#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
835#define UPHEAP_DONE(p,k) ((p) == (k))
568 836
569} 837/* away from the root */
570 838void inline_speed
571static void
572downheap (WT *heap, int N, int k) 839downheap (ANHE *heap, int N, int k)
573{ 840{
574 WT w = heap [k]; 841 ANHE he = heap [k];
842 ANHE *E = heap + N + HEAP0;
575 843
576 while (k < (N >> 1)) 844 for (;;)
577 { 845 {
578 int j = k << 1; 846 ev_tstamp minat;
847 ANHE *minpos;
848 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
579 849
580 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 850 /* find minimum child */
851 if (expect_true (pos + DHEAP - 1 < E))
581 ++j; 852 {
582 853 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
583 if (w->at <= heap [j]->at) 854 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
855 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
856 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
857 }
858 else if (pos < E)
859 {
860 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
861 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
862 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
863 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
864 }
865 else
584 break; 866 break;
585 867
868 if (ANHE_at (he) <= minat)
869 break;
870
871 heap [k] = *minpos;
872 ev_active (ANHE_w (*minpos)) = k;
873
874 k = minpos - heap;
875 }
876
877 heap [k] = he;
878 ev_active (ANHE_w (he)) = k;
879}
880
881#else /* 4HEAP */
882
883#define HEAP0 1
884#define HPARENT(k) ((k) >> 1)
885#define UPHEAP_DONE(p,k) (!(p))
886
887/* away from the root */
888void inline_speed
889downheap (ANHE *heap, int N, int k)
890{
891 ANHE he = heap [k];
892
893 for (;;)
894 {
895 int c = k << 1;
896
897 if (c > N + HEAP0 - 1)
898 break;
899
900 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
901 ? 1 : 0;
902
903 if (ANHE_at (he) <= ANHE_at (heap [c]))
904 break;
905
586 heap [k] = heap [j]; 906 heap [k] = heap [c];
587 ((W)heap [k])->active = k + 1; 907 ev_active (ANHE_w (heap [k])) = k;
908
588 k = j; 909 k = c;
589 } 910 }
590 911
591 heap [k] = w; 912 heap [k] = he;
592 ((W)heap [k])->active = k + 1; 913 ev_active (ANHE_w (he)) = k;
593} 914}
915#endif
594 916
595inline void 917/* towards the root */
918void inline_speed
919upheap (ANHE *heap, int k)
920{
921 ANHE he = heap [k];
922
923 for (;;)
924 {
925 int p = HPARENT (k);
926
927 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
928 break;
929
930 heap [k] = heap [p];
931 ev_active (ANHE_w (heap [k])) = k;
932 k = p;
933 }
934
935 heap [k] = he;
936 ev_active (ANHE_w (he)) = k;
937}
938
939void inline_size
596adjustheap (WT *heap, int N, int k) 940adjustheap (ANHE *heap, int N, int k)
597{ 941{
942 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
598 upheap (heap, k); 943 upheap (heap, k);
944 else
599 downheap (heap, N, k); 945 downheap (heap, N, k);
946}
947
948/* rebuild the heap: this function is used only once and executed rarely */
949void inline_size
950reheap (ANHE *heap, int N)
951{
952 int i;
953
954 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
955 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
956 for (i = 0; i < N; ++i)
957 upheap (heap, i + HEAP0);
600} 958}
601 959
602/*****************************************************************************/ 960/*****************************************************************************/
603 961
604typedef struct 962typedef struct
605{ 963{
606 WL head; 964 WL head;
607 sig_atomic_t volatile gotsig; 965 EV_ATOMIC_T gotsig;
608} ANSIG; 966} ANSIG;
609 967
610static ANSIG *signals; 968static ANSIG *signals;
611static int signalmax; 969static int signalmax;
612 970
613static int sigpipe [2]; 971static EV_ATOMIC_T gotsig;
614static sig_atomic_t volatile gotsig;
615static struct ev_io sigev;
616 972
617static void 973/*****************************************************************************/
618signals_init (ANSIG *base, int count)
619{
620 while (count--)
621 {
622 base->head = 0;
623 base->gotsig = 0;
624 974
625 ++base; 975void inline_speed
626 }
627}
628
629static void
630sighandler (int signum)
631{
632#if _WIN32
633 signal (signum, sighandler);
634#endif
635
636 signals [signum - 1].gotsig = 1;
637
638 if (!gotsig)
639 {
640 int old_errno = errno;
641 gotsig = 1;
642 write (sigpipe [1], &signum, 1);
643 errno = old_errno;
644 }
645}
646
647void
648ev_feed_signal_event (EV_P_ int signum)
649{
650 WL w;
651
652#if EV_MULTIPLICITY
653 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
654#endif
655
656 --signum;
657
658 if (signum < 0 || signum >= signalmax)
659 return;
660
661 signals [signum].gotsig = 0;
662
663 for (w = signals [signum].head; w; w = w->next)
664 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
665}
666
667static void
668sigcb (EV_P_ struct ev_io *iow, int revents)
669{
670 int signum;
671
672 read (sigpipe [0], &revents, 1);
673 gotsig = 0;
674
675 for (signum = signalmax; signum--; )
676 if (signals [signum].gotsig)
677 ev_feed_signal_event (EV_A_ signum + 1);
678}
679
680static void
681fd_intern (int fd) 976fd_intern (int fd)
682{ 977{
683#ifdef _WIN32 978#ifdef _WIN32
684 int arg = 1; 979 unsigned long arg = 1;
685 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 980 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
686#else 981#else
687 fcntl (fd, F_SETFD, FD_CLOEXEC); 982 fcntl (fd, F_SETFD, FD_CLOEXEC);
688 fcntl (fd, F_SETFL, O_NONBLOCK); 983 fcntl (fd, F_SETFL, O_NONBLOCK);
689#endif 984#endif
690} 985}
691 986
987static void noinline
988evpipe_init (EV_P)
989{
990 if (!ev_is_active (&pipeev))
991 {
992#if EV_USE_EVENTFD
993 if ((evfd = eventfd (0, 0)) >= 0)
994 {
995 evpipe [0] = -1;
996 fd_intern (evfd);
997 ev_io_set (&pipeev, evfd, EV_READ);
998 }
999 else
1000#endif
1001 {
1002 while (pipe (evpipe))
1003 syserr ("(libev) error creating signal/async pipe");
1004
1005 fd_intern (evpipe [0]);
1006 fd_intern (evpipe [1]);
1007 ev_io_set (&pipeev, evpipe [0], EV_READ);
1008 }
1009
1010 ev_io_start (EV_A_ &pipeev);
1011 ev_unref (EV_A); /* watcher should not keep loop alive */
1012 }
1013}
1014
1015void inline_size
1016evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1017{
1018 if (!*flag)
1019 {
1020 int old_errno = errno; /* save errno because write might clobber it */
1021
1022 *flag = 1;
1023
1024#if EV_USE_EVENTFD
1025 if (evfd >= 0)
1026 {
1027 uint64_t counter = 1;
1028 write (evfd, &counter, sizeof (uint64_t));
1029 }
1030 else
1031#endif
1032 write (evpipe [1], &old_errno, 1);
1033
1034 errno = old_errno;
1035 }
1036}
1037
692static void 1038static void
693siginit (EV_P) 1039pipecb (EV_P_ ev_io *iow, int revents)
694{ 1040{
695 fd_intern (sigpipe [0]); 1041#if EV_USE_EVENTFD
696 fd_intern (sigpipe [1]); 1042 if (evfd >= 0)
1043 {
1044 uint64_t counter;
1045 read (evfd, &counter, sizeof (uint64_t));
1046 }
1047 else
1048#endif
1049 {
1050 char dummy;
1051 read (evpipe [0], &dummy, 1);
1052 }
697 1053
698 ev_io_set (&sigev, sigpipe [0], EV_READ); 1054 if (gotsig && ev_is_default_loop (EV_A))
699 ev_io_start (EV_A_ &sigev); 1055 {
700 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1056 int signum;
1057 gotsig = 0;
1058
1059 for (signum = signalmax; signum--; )
1060 if (signals [signum].gotsig)
1061 ev_feed_signal_event (EV_A_ signum + 1);
1062 }
1063
1064#if EV_ASYNC_ENABLE
1065 if (gotasync)
1066 {
1067 int i;
1068 gotasync = 0;
1069
1070 for (i = asynccnt; i--; )
1071 if (asyncs [i]->sent)
1072 {
1073 asyncs [i]->sent = 0;
1074 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1075 }
1076 }
1077#endif
701} 1078}
702 1079
703/*****************************************************************************/ 1080/*****************************************************************************/
704 1081
705static struct ev_child *childs [PID_HASHSIZE]; 1082static void
1083ev_sighandler (int signum)
1084{
1085#if EV_MULTIPLICITY
1086 struct ev_loop *loop = &default_loop_struct;
1087#endif
1088
1089#if _WIN32
1090 signal (signum, ev_sighandler);
1091#endif
1092
1093 signals [signum - 1].gotsig = 1;
1094 evpipe_write (EV_A_ &gotsig);
1095}
1096
1097void noinline
1098ev_feed_signal_event (EV_P_ int signum)
1099{
1100 WL w;
1101
1102#if EV_MULTIPLICITY
1103 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1104#endif
1105
1106 --signum;
1107
1108 if (signum < 0 || signum >= signalmax)
1109 return;
1110
1111 signals [signum].gotsig = 0;
1112
1113 for (w = signals [signum].head; w; w = w->next)
1114 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1115}
1116
1117/*****************************************************************************/
1118
1119static WL childs [EV_PID_HASHSIZE];
706 1120
707#ifndef _WIN32 1121#ifndef _WIN32
708 1122
709static struct ev_signal childev; 1123static ev_signal childev;
1124
1125#ifndef WIFCONTINUED
1126# define WIFCONTINUED(status) 0
1127#endif
1128
1129void inline_speed
1130child_reap (EV_P_ int chain, int pid, int status)
1131{
1132 ev_child *w;
1133 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1134
1135 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1136 {
1137 if ((w->pid == pid || !w->pid)
1138 && (!traced || (w->flags & 1)))
1139 {
1140 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1141 w->rpid = pid;
1142 w->rstatus = status;
1143 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1144 }
1145 }
1146}
710 1147
711#ifndef WCONTINUED 1148#ifndef WCONTINUED
712# define WCONTINUED 0 1149# define WCONTINUED 0
713#endif 1150#endif
714 1151
715static void 1152static void
716child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
717{
718 struct ev_child *w;
719
720 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
721 if (w->pid == pid || !w->pid)
722 {
723 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
724 w->rpid = pid;
725 w->rstatus = status;
726 ev_feed_event (EV_A_ (W)w, EV_CHILD);
727 }
728}
729
730static void
731childcb (EV_P_ struct ev_signal *sw, int revents) 1153childcb (EV_P_ ev_signal *sw, int revents)
732{ 1154{
733 int pid, status; 1155 int pid, status;
734 1156
1157 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
735 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1158 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
736 { 1159 if (!WCONTINUED
1160 || errno != EINVAL
1161 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1162 return;
1163
737 /* make sure we are called again until all childs have been reaped */ 1164 /* make sure we are called again until all children have been reaped */
1165 /* we need to do it this way so that the callback gets called before we continue */
738 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1166 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
739 1167
740 child_reap (EV_A_ sw, pid, pid, status); 1168 child_reap (EV_A_ pid, pid, status);
1169 if (EV_PID_HASHSIZE > 1)
741 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1170 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
742 }
743} 1171}
744 1172
745#endif 1173#endif
746 1174
747/*****************************************************************************/ 1175/*****************************************************************************/
… …
773{ 1201{
774 return EV_VERSION_MINOR; 1202 return EV_VERSION_MINOR;
775} 1203}
776 1204
777/* return true if we are running with elevated privileges and should ignore env variables */ 1205/* return true if we are running with elevated privileges and should ignore env variables */
778static int 1206int inline_size
779enable_secure (void) 1207enable_secure (void)
780{ 1208{
781#ifdef _WIN32 1209#ifdef _WIN32
782 return 0; 1210 return 0;
783#else 1211#else
… …
785 || getgid () != getegid (); 1213 || getgid () != getegid ();
786#endif 1214#endif
787} 1215}
788 1216
789unsigned int 1217unsigned int
790ev_method (EV_P) 1218ev_supported_backends (void)
791{ 1219{
792 return method; 1220 unsigned int flags = 0;
793}
794 1221
795static void 1222 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1223 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1224 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1225 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1226 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1227
1228 return flags;
1229}
1230
1231unsigned int
1232ev_recommended_backends (void)
1233{
1234 unsigned int flags = ev_supported_backends ();
1235
1236#ifndef __NetBSD__
1237 /* kqueue is borked on everything but netbsd apparently */
1238 /* it usually doesn't work correctly on anything but sockets and pipes */
1239 flags &= ~EVBACKEND_KQUEUE;
1240#endif
1241#ifdef __APPLE__
1242 // flags &= ~EVBACKEND_KQUEUE; for documentation
1243 flags &= ~EVBACKEND_POLL;
1244#endif
1245
1246 return flags;
1247}
1248
1249unsigned int
1250ev_embeddable_backends (void)
1251{
1252 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1253
1254 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1255 /* please fix it and tell me how to detect the fix */
1256 flags &= ~EVBACKEND_EPOLL;
1257
1258 return flags;
1259}
1260
1261unsigned int
1262ev_backend (EV_P)
1263{
1264 return backend;
1265}
1266
1267unsigned int
1268ev_loop_count (EV_P)
1269{
1270 return loop_count;
1271}
1272
1273void
1274ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1275{
1276 io_blocktime = interval;
1277}
1278
1279void
1280ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1281{
1282 timeout_blocktime = interval;
1283}
1284
1285static void noinline
796loop_init (EV_P_ unsigned int flags) 1286loop_init (EV_P_ unsigned int flags)
797{ 1287{
798 if (!method) 1288 if (!backend)
799 { 1289 {
800#if EV_USE_MONOTONIC 1290#if EV_USE_MONOTONIC
801 { 1291 {
802 struct timespec ts; 1292 struct timespec ts;
803 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1293 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
804 have_monotonic = 1; 1294 have_monotonic = 1;
805 } 1295 }
806#endif 1296#endif
807 1297
808 ev_rt_now = ev_time (); 1298 ev_rt_now = ev_time ();
809 mn_now = get_clock (); 1299 mn_now = get_clock ();
810 now_floor = mn_now; 1300 now_floor = mn_now;
811 rtmn_diff = ev_rt_now - mn_now; 1301 rtmn_diff = ev_rt_now - mn_now;
812 1302
813 if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS")) 1303 io_blocktime = 0.;
1304 timeout_blocktime = 0.;
1305 backend = 0;
1306 backend_fd = -1;
1307 gotasync = 0;
1308#if EV_USE_INOTIFY
1309 fs_fd = -2;
1310#endif
1311
1312 /* pid check not overridable via env */
1313#ifndef _WIN32
1314 if (flags & EVFLAG_FORKCHECK)
1315 curpid = getpid ();
1316#endif
1317
1318 if (!(flags & EVFLAG_NOENV)
1319 && !enable_secure ()
1320 && getenv ("LIBEV_FLAGS"))
814 flags = atoi (getenv ("LIBEV_FLAGS")); 1321 flags = atoi (getenv ("LIBEV_FLAGS"));
815 1322
816 if (!(flags & 0x0000ffff)) 1323 if (!(flags & 0x0000ffffU))
817 flags |= 0x0000ffff; 1324 flags |= ev_recommended_backends ();
818 1325
819 method = 0;
820#if EV_USE_PORT 1326#if EV_USE_PORT
821 if (!method && (flags & EVMETHOD_PORT )) method = port_init (EV_A_ flags); 1327 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
822#endif 1328#endif
823#if EV_USE_KQUEUE 1329#if EV_USE_KQUEUE
824 if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags); 1330 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
825#endif 1331#endif
826#if EV_USE_EPOLL 1332#if EV_USE_EPOLL
827 if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags); 1333 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
828#endif 1334#endif
829#if EV_USE_POLL 1335#if EV_USE_POLL
830 if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags); 1336 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
831#endif 1337#endif
832#if EV_USE_SELECT 1338#if EV_USE_SELECT
833 if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags); 1339 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
834#endif 1340#endif
835 1341
836 ev_init (&sigev, sigcb); 1342 ev_init (&pipeev, pipecb);
837 ev_set_priority (&sigev, EV_MAXPRI); 1343 ev_set_priority (&pipeev, EV_MAXPRI);
838 } 1344 }
839} 1345}
840 1346
841static void 1347static void noinline
842loop_destroy (EV_P) 1348loop_destroy (EV_P)
843{ 1349{
844 int i; 1350 int i;
845 1351
1352 if (ev_is_active (&pipeev))
1353 {
1354 ev_ref (EV_A); /* signal watcher */
1355 ev_io_stop (EV_A_ &pipeev);
1356
1357#if EV_USE_EVENTFD
1358 if (evfd >= 0)
1359 close (evfd);
1360#endif
1361
1362 if (evpipe [0] >= 0)
1363 {
1364 close (evpipe [0]);
1365 close (evpipe [1]);
1366 }
1367 }
1368
1369#if EV_USE_INOTIFY
1370 if (fs_fd >= 0)
1371 close (fs_fd);
1372#endif
1373
1374 if (backend_fd >= 0)
1375 close (backend_fd);
1376
846#if EV_USE_PORT 1377#if EV_USE_PORT
847 if (method == EVMETHOD_PORT ) port_destroy (EV_A); 1378 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
848#endif 1379#endif
849#if EV_USE_KQUEUE 1380#if EV_USE_KQUEUE
850 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1381 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
851#endif 1382#endif
852#if EV_USE_EPOLL 1383#if EV_USE_EPOLL
853 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1384 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
854#endif 1385#endif
855#if EV_USE_POLL 1386#if EV_USE_POLL
856 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1387 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
857#endif 1388#endif
858#if EV_USE_SELECT 1389#if EV_USE_SELECT
859 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1390 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
860#endif 1391#endif
861 1392
862 for (i = NUMPRI; i--; ) 1393 for (i = NUMPRI; i--; )
1394 {
863 array_free (pending, [i]); 1395 array_free (pending, [i]);
1396#if EV_IDLE_ENABLE
1397 array_free (idle, [i]);
1398#endif
1399 }
1400
1401 ev_free (anfds); anfdmax = 0;
864 1402
865 /* have to use the microsoft-never-gets-it-right macro */ 1403 /* have to use the microsoft-never-gets-it-right macro */
866 array_free (fdchange, EMPTY0); 1404 array_free (fdchange, EMPTY);
867 array_free (timer, EMPTY0); 1405 array_free (timer, EMPTY);
868#if EV_PERIODICS 1406#if EV_PERIODIC_ENABLE
869 array_free (periodic, EMPTY0); 1407 array_free (periodic, EMPTY);
870#endif 1408#endif
1409#if EV_FORK_ENABLE
871 array_free (idle, EMPTY0); 1410 array_free (fork, EMPTY);
1411#endif
872 array_free (prepare, EMPTY0); 1412 array_free (prepare, EMPTY);
873 array_free (check, EMPTY0); 1413 array_free (check, EMPTY);
1414#if EV_ASYNC_ENABLE
1415 array_free (async, EMPTY);
1416#endif
874 1417
875 method = 0; 1418 backend = 0;
876} 1419}
877 1420
878static void 1421#if EV_USE_INOTIFY
1422void inline_size infy_fork (EV_P);
1423#endif
1424
1425void inline_size
879loop_fork (EV_P) 1426loop_fork (EV_P)
880{ 1427{
881#if EV_USE_PORT 1428#if EV_USE_PORT
882 if (method == EVMETHOD_PORT ) port_fork (EV_A); 1429 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
883#endif 1430#endif
884#if EV_USE_KQUEUE 1431#if EV_USE_KQUEUE
885 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 1432 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
886#endif 1433#endif
887#if EV_USE_EPOLL 1434#if EV_USE_EPOLL
888 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1435 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
889#endif 1436#endif
1437#if EV_USE_INOTIFY
1438 infy_fork (EV_A);
1439#endif
890 1440
891 if (ev_is_active (&sigev)) 1441 if (ev_is_active (&pipeev))
892 { 1442 {
893 /* default loop */ 1443 /* this "locks" the handlers against writing to the pipe */
1444 /* while we modify the fd vars */
1445 gotsig = 1;
1446#if EV_ASYNC_ENABLE
1447 gotasync = 1;
1448#endif
894 1449
895 ev_ref (EV_A); 1450 ev_ref (EV_A);
896 ev_io_stop (EV_A_ &sigev); 1451 ev_io_stop (EV_A_ &pipeev);
1452
1453#if EV_USE_EVENTFD
1454 if (evfd >= 0)
1455 close (evfd);
1456#endif
1457
1458 if (evpipe [0] >= 0)
1459 {
897 close (sigpipe [0]); 1460 close (evpipe [0]);
898 close (sigpipe [1]); 1461 close (evpipe [1]);
1462 }
899 1463
900 while (pipe (sigpipe))
901 syserr ("(libev) error creating pipe");
902
903 siginit (EV_A); 1464 evpipe_init (EV_A);
1465 /* now iterate over everything, in case we missed something */
1466 pipecb (EV_A_ &pipeev, EV_READ);
904 } 1467 }
905 1468
906 postfork = 0; 1469 postfork = 0;
907} 1470}
908 1471
909#if EV_MULTIPLICITY 1472#if EV_MULTIPLICITY
1473
910struct ev_loop * 1474struct ev_loop *
911ev_loop_new (unsigned int flags) 1475ev_loop_new (unsigned int flags)
912{ 1476{
913 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 1477 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
914 1478
915 memset (loop, 0, sizeof (struct ev_loop)); 1479 memset (loop, 0, sizeof (struct ev_loop));
916 1480
917 loop_init (EV_A_ flags); 1481 loop_init (EV_A_ flags);
918 1482
919 if (ev_method (EV_A)) 1483 if (ev_backend (EV_A))
920 return loop; 1484 return loop;
921 1485
922 return 0; 1486 return 0;
923} 1487}
924 1488
… …
930} 1494}
931 1495
932void 1496void
933ev_loop_fork (EV_P) 1497ev_loop_fork (EV_P)
934{ 1498{
935 postfork = 1; 1499 postfork = 1; /* must be in line with ev_default_fork */
936} 1500}
937 1501
1502#if EV_VERIFY
1503static void noinline
1504verify_watcher (EV_P_ W w)
1505{
1506 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1507
1508 if (w->pending)
1509 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1510}
1511
1512static void noinline
1513verify_heap (EV_P_ ANHE *heap, int N)
1514{
1515 int i;
1516
1517 for (i = HEAP0; i < N + HEAP0; ++i)
1518 {
1519 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1520 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1521 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1522
1523 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1524 }
1525}
1526
1527static void noinline
1528array_verify (EV_P_ W *ws, int cnt)
1529{
1530 while (cnt--)
1531 {
1532 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1533 verify_watcher (EV_A_ ws [cnt]);
1534 }
1535}
1536#endif
1537
1538void
1539ev_loop_verify (EV_P)
1540{
1541#if EV_VERIFY
1542 int i;
1543 WL w;
1544
1545 assert (activecnt >= -1);
1546
1547 assert (fdchangemax >= fdchangecnt);
1548 for (i = 0; i < fdchangecnt; ++i)
1549 assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1550
1551 assert (anfdmax >= 0);
1552 for (i = 0; i < anfdmax; ++i)
1553 for (w = anfds [i].head; w; w = w->next)
1554 {
1555 verify_watcher (EV_A_ (W)w);
1556 assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
1557 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1558 }
1559
1560 assert (timermax >= timercnt);
1561 verify_heap (EV_A_ timers, timercnt);
1562
1563#if EV_PERIODIC_ENABLE
1564 assert (periodicmax >= periodiccnt);
1565 verify_heap (EV_A_ periodics, periodiccnt);
1566#endif
1567
1568 for (i = NUMPRI; i--; )
1569 {
1570 assert (pendingmax [i] >= pendingcnt [i]);
1571#if EV_IDLE_ENABLE
1572 assert (idleall >= 0);
1573 assert (idlemax [i] >= idlecnt [i]);
1574 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1575#endif
1576 }
1577
1578#if EV_FORK_ENABLE
1579 assert (forkmax >= forkcnt);
1580 array_verify (EV_A_ (W *)forks, forkcnt);
1581#endif
1582
1583#if EV_ASYNC_ENABLE
1584 assert (asyncmax >= asynccnt);
1585 array_verify (EV_A_ (W *)asyncs, asynccnt);
1586#endif
1587
1588 assert (preparemax >= preparecnt);
1589 array_verify (EV_A_ (W *)prepares, preparecnt);
1590
1591 assert (checkmax >= checkcnt);
1592 array_verify (EV_A_ (W *)checks, checkcnt);
1593
1594# if 0
1595 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1596 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
938#endif 1597# endif
1598#endif
1599}
1600
1601#endif /* multiplicity */
939 1602
940#if EV_MULTIPLICITY 1603#if EV_MULTIPLICITY
941struct ev_loop * 1604struct ev_loop *
942ev_default_loop_init (unsigned int flags) 1605ev_default_loop_init (unsigned int flags)
943#else 1606#else
944int 1607int
945ev_default_loop (unsigned int flags) 1608ev_default_loop (unsigned int flags)
946#endif 1609#endif
947{ 1610{
948 if (sigpipe [0] == sigpipe [1])
949 if (pipe (sigpipe))
950 return 0;
951
952 if (!ev_default_loop_ptr) 1611 if (!ev_default_loop_ptr)
953 { 1612 {
954#if EV_MULTIPLICITY 1613#if EV_MULTIPLICITY
955 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 1614 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
956#else 1615#else
957 ev_default_loop_ptr = 1; 1616 ev_default_loop_ptr = 1;
958#endif 1617#endif
959 1618
960 loop_init (EV_A_ flags); 1619 loop_init (EV_A_ flags);
961 1620
962 if (ev_method (EV_A)) 1621 if (ev_backend (EV_A))
963 { 1622 {
964 siginit (EV_A);
965
966#ifndef _WIN32 1623#ifndef _WIN32
967 ev_signal_init (&childev, childcb, SIGCHLD); 1624 ev_signal_init (&childev, childcb, SIGCHLD);
968 ev_set_priority (&childev, EV_MAXPRI); 1625 ev_set_priority (&childev, EV_MAXPRI);
969 ev_signal_start (EV_A_ &childev); 1626 ev_signal_start (EV_A_ &childev);
970 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1627 ev_unref (EV_A); /* child watcher should not keep loop alive */
… …
982{ 1639{
983#if EV_MULTIPLICITY 1640#if EV_MULTIPLICITY
984 struct ev_loop *loop = ev_default_loop_ptr; 1641 struct ev_loop *loop = ev_default_loop_ptr;
985#endif 1642#endif
986 1643
1644 ev_default_loop_ptr = 0;
1645
987#ifndef _WIN32 1646#ifndef _WIN32
988 ev_ref (EV_A); /* child watcher */ 1647 ev_ref (EV_A); /* child watcher */
989 ev_signal_stop (EV_A_ &childev); 1648 ev_signal_stop (EV_A_ &childev);
990#endif 1649#endif
991 1650
992 ev_ref (EV_A); /* signal watcher */
993 ev_io_stop (EV_A_ &sigev);
994
995 close (sigpipe [0]); sigpipe [0] = 0;
996 close (sigpipe [1]); sigpipe [1] = 0;
997
998 loop_destroy (EV_A); 1651 loop_destroy (EV_A);
999} 1652}
1000 1653
1001void 1654void
1002ev_default_fork (void) 1655ev_default_fork (void)
1003{ 1656{
1004#if EV_MULTIPLICITY 1657#if EV_MULTIPLICITY
1005 struct ev_loop *loop = ev_default_loop_ptr; 1658 struct ev_loop *loop = ev_default_loop_ptr;
1006#endif 1659#endif
1007 1660
1008 if (method) 1661 if (backend)
1009 postfork = 1; 1662 postfork = 1; /* must be in line with ev_loop_fork */
1010} 1663}
1011 1664
1012/*****************************************************************************/ 1665/*****************************************************************************/
1013 1666
1014static int 1667void
1015any_pending (EV_P) 1668ev_invoke (EV_P_ void *w, int revents)
1016{ 1669{
1017 int pri; 1670 EV_CB_INVOKE ((W)w, revents);
1018
1019 for (pri = NUMPRI; pri--; )
1020 if (pendingcnt [pri])
1021 return 1;
1022
1023 return 0;
1024} 1671}
1025 1672
1026inline void 1673void inline_speed
1027call_pending (EV_P) 1674call_pending (EV_P)
1028{ 1675{
1029 int pri; 1676 int pri;
1030 1677
1031 for (pri = NUMPRI; pri--; ) 1678 for (pri = NUMPRI; pri--; )
… …
1033 { 1680 {
1034 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1681 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1035 1682
1036 if (expect_true (p->w)) 1683 if (expect_true (p->w))
1037 { 1684 {
1685 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1686
1038 p->w->pending = 0; 1687 p->w->pending = 0;
1039 EV_CB_INVOKE (p->w, p->events); 1688 EV_CB_INVOKE (p->w, p->events);
1689 EV_FREQUENT_CHECK;
1040 } 1690 }
1041 } 1691 }
1042} 1692}
1043 1693
1044inline void 1694#if EV_IDLE_ENABLE
1695void inline_size
1696idle_reify (EV_P)
1697{
1698 if (expect_false (idleall))
1699 {
1700 int pri;
1701
1702 for (pri = NUMPRI; pri--; )
1703 {
1704 if (pendingcnt [pri])
1705 break;
1706
1707 if (idlecnt [pri])
1708 {
1709 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1710 break;
1711 }
1712 }
1713 }
1714}
1715#endif
1716
1717void inline_size
1045timers_reify (EV_P) 1718timers_reify (EV_P)
1046{ 1719{
1720 EV_FREQUENT_CHECK;
1721
1047 while (timercnt && ((WT)timers [0])->at <= mn_now) 1722 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1048 { 1723 {
1049 struct ev_timer *w = timers [0]; 1724 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1050 1725
1051 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1726 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1052 1727
1053 /* first reschedule or stop timer */ 1728 /* first reschedule or stop timer */
1054 if (w->repeat) 1729 if (w->repeat)
1055 { 1730 {
1731 ev_at (w) += w->repeat;
1732 if (ev_at (w) < mn_now)
1733 ev_at (w) = mn_now;
1734
1056 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1735 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1057 1736
1058 ((WT)w)->at += w->repeat; 1737 ANHE_at_cache (timers [HEAP0]);
1059 if (((WT)w)->at < mn_now)
1060 ((WT)w)->at = mn_now;
1061
1062 downheap ((WT *)timers, timercnt, 0); 1738 downheap (timers, timercnt, HEAP0);
1063 } 1739 }
1064 else 1740 else
1065 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1741 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1066 1742
1743 EV_FREQUENT_CHECK;
1067 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 1744 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1068 } 1745 }
1069} 1746}
1070 1747
1071#if EV_PERIODICS 1748#if EV_PERIODIC_ENABLE
1072inline void 1749void inline_size
1073periodics_reify (EV_P) 1750periodics_reify (EV_P)
1074{ 1751{
1752 EV_FREQUENT_CHECK;
1753
1075 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 1754 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1076 { 1755 {
1077 struct ev_periodic *w = periodics [0]; 1756 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1078 1757
1079 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1758 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1080 1759
1081 /* first reschedule or stop timer */ 1760 /* first reschedule or stop timer */
1082 if (w->reschedule_cb) 1761 if (w->reschedule_cb)
1083 { 1762 {
1084 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 1763 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1764
1085 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 1765 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1766
1767 ANHE_at_cache (periodics [HEAP0]);
1086 downheap ((WT *)periodics, periodiccnt, 0); 1768 downheap (periodics, periodiccnt, HEAP0);
1087 } 1769 }
1088 else if (w->interval) 1770 else if (w->interval)
1089 { 1771 {
1090 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; 1772 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1091 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now)); 1773 /* if next trigger time is not sufficiently in the future, put it there */
1774 /* this might happen because of floating point inexactness */
1775 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1776 {
1777 ev_at (w) += w->interval;
1778
1779 /* if interval is unreasonably low we might still have a time in the past */
1780 /* so correct this. this will make the periodic very inexact, but the user */
1781 /* has effectively asked to get triggered more often than possible */
1782 if (ev_at (w) < ev_rt_now)
1783 ev_at (w) = ev_rt_now;
1784 }
1785
1786 ANHE_at_cache (periodics [HEAP0]);
1092 downheap ((WT *)periodics, periodiccnt, 0); 1787 downheap (periodics, periodiccnt, HEAP0);
1093 } 1788 }
1094 else 1789 else
1095 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1790 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1096 1791
1792 EV_FREQUENT_CHECK;
1097 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 1793 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1098 } 1794 }
1099} 1795}
1100 1796
1101static void 1797static void noinline
1102periodics_reschedule (EV_P) 1798periodics_reschedule (EV_P)
1103{ 1799{
1104 int i; 1800 int i;
1105 1801
1106 /* adjust periodics after time jump */ 1802 /* adjust periodics after time jump */
1107 for (i = 0; i < periodiccnt; ++i) 1803 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1108 { 1804 {
1109 struct ev_periodic *w = periodics [i]; 1805 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1110 1806
1111 if (w->reschedule_cb) 1807 if (w->reschedule_cb)
1112 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 1808 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1113 else if (w->interval) 1809 else if (w->interval)
1114 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 1810 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1811
1812 ANHE_at_cache (periodics [i]);
1813 }
1814
1815 reheap (periodics, periodiccnt);
1816}
1817#endif
1818
1819void inline_speed
1820time_update (EV_P_ ev_tstamp max_block)
1821{
1822 int i;
1823
1824#if EV_USE_MONOTONIC
1825 if (expect_true (have_monotonic))
1115 } 1826 {
1827 ev_tstamp odiff = rtmn_diff;
1116 1828
1117 /* now rebuild the heap */
1118 for (i = periodiccnt >> 1; i--; )
1119 downheap ((WT *)periodics, periodiccnt, i);
1120}
1121#endif
1122
1123inline int
1124time_update_monotonic (EV_P)
1125{
1126 mn_now = get_clock (); 1829 mn_now = get_clock ();
1127 1830
1831 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1832 /* interpolate in the meantime */
1128 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 1833 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1129 { 1834 {
1130 ev_rt_now = rtmn_diff + mn_now; 1835 ev_rt_now = rtmn_diff + mn_now;
1131 return 0; 1836 return;
1132 } 1837 }
1133 else 1838
1134 {
1135 now_floor = mn_now; 1839 now_floor = mn_now;
1136 ev_rt_now = ev_time (); 1840 ev_rt_now = ev_time ();
1137 return 1;
1138 }
1139}
1140 1841
1141inline void 1842 /* loop a few times, before making important decisions.
1142time_update (EV_P) 1843 * on the choice of "4": one iteration isn't enough,
1143{ 1844 * in case we get preempted during the calls to
1144 int i; 1845 * ev_time and get_clock. a second call is almost guaranteed
1145 1846 * to succeed in that case, though. and looping a few more times
1146#if EV_USE_MONOTONIC 1847 * doesn't hurt either as we only do this on time-jumps or
1147 if (expect_true (have_monotonic)) 1848 * in the unlikely event of having been preempted here.
1148 { 1849 */
1149 if (time_update_monotonic (EV_A)) 1850 for (i = 4; --i; )
1150 { 1851 {
1151 ev_tstamp odiff = rtmn_diff; 1852 rtmn_diff = ev_rt_now - mn_now;
1152 1853
1153 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1854 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1855 return; /* all is well */
1856
1857 ev_rt_now = ev_time ();
1858 mn_now = get_clock ();
1859 now_floor = mn_now;
1860 }
1861
1862# if EV_PERIODIC_ENABLE
1863 periodics_reschedule (EV_A);
1864# endif
1865 /* no timer adjustment, as the monotonic clock doesn't jump */
1866 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1867 }
1868 else
1869#endif
1870 {
1871 ev_rt_now = ev_time ();
1872
1873 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1874 {
1875#if EV_PERIODIC_ENABLE
1876 periodics_reschedule (EV_A);
1877#endif
1878 /* adjust timers. this is easy, as the offset is the same for all of them */
1879 for (i = 0; i < timercnt; ++i)
1154 { 1880 {
1155 rtmn_diff = ev_rt_now - mn_now; 1881 ANHE *he = timers + i + HEAP0;
1156 1882 ANHE_w (*he)->at += ev_rt_now - mn_now;
1157 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1883 ANHE_at_cache (*he);
1158 return; /* all is well */
1159
1160 ev_rt_now = ev_time ();
1161 mn_now = get_clock ();
1162 now_floor = mn_now;
1163 } 1884 }
1164
1165# if EV_PERIODICS
1166 periodics_reschedule (EV_A);
1167# endif
1168 /* no timer adjustment, as the monotonic clock doesn't jump */
1169 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1170 } 1885 }
1171 }
1172 else
1173#endif
1174 {
1175 ev_rt_now = ev_time ();
1176
1177 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1178 {
1179#if EV_PERIODICS
1180 periodics_reschedule (EV_A);
1181#endif
1182
1183 /* adjust timers. this is easy, as the offset is the same for all */
1184 for (i = 0; i < timercnt; ++i)
1185 ((WT)timers [i])->at += ev_rt_now - mn_now;
1186 }
1187 1886
1188 mn_now = ev_rt_now; 1887 mn_now = ev_rt_now;
1189 } 1888 }
1190} 1889}
1191 1890
… …
1199ev_unref (EV_P) 1898ev_unref (EV_P)
1200{ 1899{
1201 --activecnt; 1900 --activecnt;
1202} 1901}
1203 1902
1903void
1904ev_now_update (EV_P)
1905{
1906 time_update (EV_A_ 1e100);
1907}
1908
1204static int loop_done; 1909static int loop_done;
1205 1910
1206void 1911void
1207ev_loop (EV_P_ int flags) 1912ev_loop (EV_P_ int flags)
1208{ 1913{
1209 double block; 1914 loop_done = EVUNLOOP_CANCEL;
1210 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
1211 1915
1212 while (activecnt) 1916 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1917
1918 do
1213 { 1919 {
1920#if EV_VERIFY >= 2
1921 ev_loop_verify (EV_A);
1922#endif
1923
1924#ifndef _WIN32
1925 if (expect_false (curpid)) /* penalise the forking check even more */
1926 if (expect_false (getpid () != curpid))
1927 {
1928 curpid = getpid ();
1929 postfork = 1;
1930 }
1931#endif
1932
1933#if EV_FORK_ENABLE
1934 /* we might have forked, so queue fork handlers */
1935 if (expect_false (postfork))
1936 if (forkcnt)
1937 {
1938 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1939 call_pending (EV_A);
1940 }
1941#endif
1942
1214 /* queue check watchers (and execute them) */ 1943 /* queue prepare watchers (and execute them) */
1215 if (expect_false (preparecnt)) 1944 if (expect_false (preparecnt))
1216 { 1945 {
1217 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1946 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1218 call_pending (EV_A); 1947 call_pending (EV_A);
1219 } 1948 }
1220 1949
1950 if (expect_false (!activecnt))
1951 break;
1952
1221 /* we might have forked, so reify kernel state if necessary */ 1953 /* we might have forked, so reify kernel state if necessary */
1222 if (expect_false (postfork)) 1954 if (expect_false (postfork))
1223 loop_fork (EV_A); 1955 loop_fork (EV_A);
1224 1956
1225 /* update fd-related kernel structures */ 1957 /* update fd-related kernel structures */
1226 fd_reify (EV_A); 1958 fd_reify (EV_A);
1227 1959
1228 /* calculate blocking time */ 1960 /* calculate blocking time */
1961 {
1962 ev_tstamp waittime = 0.;
1963 ev_tstamp sleeptime = 0.;
1229 1964
1230 /* we only need this for !monotonic clock or timers, but as we basically 1965 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1231 always have timers, we just calculate it always */
1232#if EV_USE_MONOTONIC
1233 if (expect_true (have_monotonic))
1234 time_update_monotonic (EV_A);
1235 else
1236#endif
1237 { 1966 {
1238 ev_rt_now = ev_time (); 1967 /* update time to cancel out callback processing overhead */
1239 mn_now = ev_rt_now; 1968 time_update (EV_A_ 1e100);
1240 }
1241 1969
1242 if (flags & EVLOOP_NONBLOCK || idlecnt)
1243 block = 0.;
1244 else
1245 {
1246 block = MAX_BLOCKTIME; 1970 waittime = MAX_BLOCKTIME;
1247 1971
1248 if (timercnt) 1972 if (timercnt)
1249 { 1973 {
1250 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 1974 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1251 if (block > to) block = to; 1975 if (waittime > to) waittime = to;
1252 } 1976 }
1253 1977
1254#if EV_PERIODICS 1978#if EV_PERIODIC_ENABLE
1255 if (periodiccnt) 1979 if (periodiccnt)
1256 { 1980 {
1257 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; 1981 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1258 if (block > to) block = to; 1982 if (waittime > to) waittime = to;
1259 } 1983 }
1260#endif 1984#endif
1261 1985
1262 if (expect_false (block < 0.)) block = 0.; 1986 if (expect_false (waittime < timeout_blocktime))
1987 waittime = timeout_blocktime;
1988
1989 sleeptime = waittime - backend_fudge;
1990
1991 if (expect_true (sleeptime > io_blocktime))
1992 sleeptime = io_blocktime;
1993
1994 if (sleeptime)
1995 {
1996 ev_sleep (sleeptime);
1997 waittime -= sleeptime;
1998 }
1263 } 1999 }
1264 2000
1265 method_poll (EV_A_ block); 2001 ++loop_count;
2002 backend_poll (EV_A_ waittime);
1266 2003
1267 /* update ev_rt_now, do magic */ 2004 /* update ev_rt_now, do magic */
1268 time_update (EV_A); 2005 time_update (EV_A_ waittime + sleeptime);
2006 }
1269 2007
1270 /* queue pending timers and reschedule them */ 2008 /* queue pending timers and reschedule them */
1271 timers_reify (EV_A); /* relative timers called last */ 2009 timers_reify (EV_A); /* relative timers called last */
1272#if EV_PERIODICS 2010#if EV_PERIODIC_ENABLE
1273 periodics_reify (EV_A); /* absolute timers called first */ 2011 periodics_reify (EV_A); /* absolute timers called first */
1274#endif 2012#endif
1275 2013
2014#if EV_IDLE_ENABLE
1276 /* queue idle watchers unless io or timers are pending */ 2015 /* queue idle watchers unless other events are pending */
1277 if (idlecnt && !any_pending (EV_A)) 2016 idle_reify (EV_A);
1278 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2017#endif
1279 2018
1280 /* queue check watchers, to be executed first */ 2019 /* queue check watchers, to be executed first */
1281 if (expect_false (checkcnt)) 2020 if (expect_false (checkcnt))
1282 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2021 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1283 2022
1284 call_pending (EV_A); 2023 call_pending (EV_A);
1285
1286 if (expect_false (loop_done))
1287 break;
1288 } 2024 }
2025 while (expect_true (
2026 activecnt
2027 && !loop_done
2028 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2029 ));
1289 2030
1290 if (loop_done != 2) 2031 if (loop_done == EVUNLOOP_ONE)
1291 loop_done = 0; 2032 loop_done = EVUNLOOP_CANCEL;
1292} 2033}
1293 2034
1294void 2035void
1295ev_unloop (EV_P_ int how) 2036ev_unloop (EV_P_ int how)
1296{ 2037{
1297 loop_done = how; 2038 loop_done = how;
1298} 2039}
1299 2040
1300/*****************************************************************************/ 2041/*****************************************************************************/
1301 2042
1302inline void 2043void inline_size
1303wlist_add (WL *head, WL elem) 2044wlist_add (WL *head, WL elem)
1304{ 2045{
1305 elem->next = *head; 2046 elem->next = *head;
1306 *head = elem; 2047 *head = elem;
1307} 2048}
1308 2049
1309inline void 2050void inline_size
1310wlist_del (WL *head, WL elem) 2051wlist_del (WL *head, WL elem)
1311{ 2052{
1312 while (*head) 2053 while (*head)
1313 { 2054 {
1314 if (*head == elem) 2055 if (*head == elem)
… …
1319 2060
1320 head = &(*head)->next; 2061 head = &(*head)->next;
1321 } 2062 }
1322} 2063}
1323 2064
1324inline void 2065void inline_speed
1325ev_clear_pending (EV_P_ W w) 2066clear_pending (EV_P_ W w)
1326{ 2067{
1327 if (w->pending) 2068 if (w->pending)
1328 { 2069 {
1329 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2070 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1330 w->pending = 0; 2071 w->pending = 0;
1331 } 2072 }
1332} 2073}
1333 2074
1334inline void 2075int
2076ev_clear_pending (EV_P_ void *w)
2077{
2078 W w_ = (W)w;
2079 int pending = w_->pending;
2080
2081 if (expect_true (pending))
2082 {
2083 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2084 w_->pending = 0;
2085 p->w = 0;
2086 return p->events;
2087 }
2088 else
2089 return 0;
2090}
2091
2092void inline_size
2093pri_adjust (EV_P_ W w)
2094{
2095 int pri = w->priority;
2096 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2097 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2098 w->priority = pri;
2099}
2100
2101void inline_speed
1335ev_start (EV_P_ W w, int active) 2102ev_start (EV_P_ W w, int active)
1336{ 2103{
1337 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2104 pri_adjust (EV_A_ w);
1338 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1339
1340 w->active = active; 2105 w->active = active;
1341 ev_ref (EV_A); 2106 ev_ref (EV_A);
1342} 2107}
1343 2108
1344inline void 2109void inline_size
1345ev_stop (EV_P_ W w) 2110ev_stop (EV_P_ W w)
1346{ 2111{
1347 ev_unref (EV_A); 2112 ev_unref (EV_A);
1348 w->active = 0; 2113 w->active = 0;
1349} 2114}
1350 2115
1351/*****************************************************************************/ 2116/*****************************************************************************/
1352 2117
1353void 2118void noinline
1354ev_io_start (EV_P_ struct ev_io *w) 2119ev_io_start (EV_P_ ev_io *w)
1355{ 2120{
1356 int fd = w->fd; 2121 int fd = w->fd;
1357 2122
1358 if (expect_false (ev_is_active (w))) 2123 if (expect_false (ev_is_active (w)))
1359 return; 2124 return;
1360 2125
1361 assert (("ev_io_start called with negative fd", fd >= 0)); 2126 assert (("ev_io_start called with negative fd", fd >= 0));
2127 assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));
2128
2129 EV_FREQUENT_CHECK;
1362 2130
1363 ev_start (EV_A_ (W)w, 1); 2131 ev_start (EV_A_ (W)w, 1);
1364 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2132 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1365 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2133 wlist_add (&anfds[fd].head, (WL)w);
1366 2134
1367 fd_change (EV_A_ fd); 2135 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1368} 2136 w->events &= ~EV_IOFDSET;
1369 2137
1370void 2138 EV_FREQUENT_CHECK;
2139}
2140
2141void noinline
1371ev_io_stop (EV_P_ struct ev_io *w) 2142ev_io_stop (EV_P_ ev_io *w)
1372{ 2143{
1373 ev_clear_pending (EV_A_ (W)w); 2144 clear_pending (EV_A_ (W)w);
1374 if (expect_false (!ev_is_active (w))) 2145 if (expect_false (!ev_is_active (w)))
1375 return; 2146 return;
1376 2147
1377 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2148 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1378 2149
2150 EV_FREQUENT_CHECK;
2151
1379 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2152 wlist_del (&anfds[w->fd].head, (WL)w);
1380 ev_stop (EV_A_ (W)w); 2153 ev_stop (EV_A_ (W)w);
1381 2154
1382 fd_change (EV_A_ w->fd); 2155 fd_change (EV_A_ w->fd, 1);
1383}
1384 2156
1385void 2157 EV_FREQUENT_CHECK;
2158}
2159
2160void noinline
1386ev_timer_start (EV_P_ struct ev_timer *w) 2161ev_timer_start (EV_P_ ev_timer *w)
1387{ 2162{
1388 if (expect_false (ev_is_active (w))) 2163 if (expect_false (ev_is_active (w)))
1389 return; 2164 return;
1390 2165
1391 ((WT)w)->at += mn_now; 2166 ev_at (w) += mn_now;
1392 2167
1393 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2168 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1394 2169
2170 EV_FREQUENT_CHECK;
2171
2172 ++timercnt;
1395 ev_start (EV_A_ (W)w, ++timercnt); 2173 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1396 array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2); 2174 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1397 timers [timercnt - 1] = w; 2175 ANHE_w (timers [ev_active (w)]) = (WT)w;
1398 upheap ((WT *)timers, timercnt - 1); 2176 ANHE_at_cache (timers [ev_active (w)]);
2177 upheap (timers, ev_active (w));
1399 2178
2179 EV_FREQUENT_CHECK;
2180
1400 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2181 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1401} 2182}
1402 2183
1403void 2184void noinline
1404ev_timer_stop (EV_P_ struct ev_timer *w) 2185ev_timer_stop (EV_P_ ev_timer *w)
1405{ 2186{
1406 ev_clear_pending (EV_A_ (W)w); 2187 clear_pending (EV_A_ (W)w);
1407 if (expect_false (!ev_is_active (w))) 2188 if (expect_false (!ev_is_active (w)))
1408 return; 2189 return;
1409 2190
2191 EV_FREQUENT_CHECK;
2192
2193 {
2194 int active = ev_active (w);
2195
1410 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2196 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1411 2197
2198 --timercnt;
2199
1412 if (expect_true (((W)w)->active < timercnt--)) 2200 if (expect_true (active < timercnt + HEAP0))
1413 { 2201 {
1414 timers [((W)w)->active - 1] = timers [timercnt]; 2202 timers [active] = timers [timercnt + HEAP0];
1415 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2203 adjustheap (timers, timercnt, active);
1416 } 2204 }
2205 }
1417 2206
1418 ((WT)w)->at -= mn_now; 2207 EV_FREQUENT_CHECK;
2208
2209 ev_at (w) -= mn_now;
1419 2210
1420 ev_stop (EV_A_ (W)w); 2211 ev_stop (EV_A_ (W)w);
1421} 2212}
1422 2213
1423void 2214void noinline
1424ev_timer_again (EV_P_ struct ev_timer *w) 2215ev_timer_again (EV_P_ ev_timer *w)
1425{ 2216{
2217 EV_FREQUENT_CHECK;
2218
1426 if (ev_is_active (w)) 2219 if (ev_is_active (w))
1427 { 2220 {
1428 if (w->repeat) 2221 if (w->repeat)
1429 { 2222 {
1430 ((WT)w)->at = mn_now + w->repeat; 2223 ev_at (w) = mn_now + w->repeat;
2224 ANHE_at_cache (timers [ev_active (w)]);
1431 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2225 adjustheap (timers, timercnt, ev_active (w));
1432 } 2226 }
1433 else 2227 else
1434 ev_timer_stop (EV_A_ w); 2228 ev_timer_stop (EV_A_ w);
1435 } 2229 }
1436 else if (w->repeat) 2230 else if (w->repeat)
1437 { 2231 {
1438 w->at = w->repeat; 2232 ev_at (w) = w->repeat;
1439 ev_timer_start (EV_A_ w); 2233 ev_timer_start (EV_A_ w);
1440 } 2234 }
1441}
1442 2235
2236 EV_FREQUENT_CHECK;
2237}
2238
1443#if EV_PERIODICS 2239#if EV_PERIODIC_ENABLE
1444void 2240void noinline
1445ev_periodic_start (EV_P_ struct ev_periodic *w) 2241ev_periodic_start (EV_P_ ev_periodic *w)
1446{ 2242{
1447 if (expect_false (ev_is_active (w))) 2243 if (expect_false (ev_is_active (w)))
1448 return; 2244 return;
1449 2245
1450 if (w->reschedule_cb) 2246 if (w->reschedule_cb)
1451 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2247 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1452 else if (w->interval) 2248 else if (w->interval)
1453 { 2249 {
1454 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2250 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1455 /* this formula differs from the one in periodic_reify because we do not always round up */ 2251 /* this formula differs from the one in periodic_reify because we do not always round up */
1456 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2252 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1457 } 2253 }
2254 else
2255 ev_at (w) = w->offset;
1458 2256
2257 EV_FREQUENT_CHECK;
2258
2259 ++periodiccnt;
1459 ev_start (EV_A_ (W)w, ++periodiccnt); 2260 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1460 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 2261 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1461 periodics [periodiccnt - 1] = w; 2262 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1462 upheap ((WT *)periodics, periodiccnt - 1); 2263 ANHE_at_cache (periodics [ev_active (w)]);
2264 upheap (periodics, ev_active (w));
1463 2265
2266 EV_FREQUENT_CHECK;
2267
1464 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2268 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1465} 2269}
1466 2270
1467void 2271void noinline
1468ev_periodic_stop (EV_P_ struct ev_periodic *w) 2272ev_periodic_stop (EV_P_ ev_periodic *w)
1469{ 2273{
1470 ev_clear_pending (EV_A_ (W)w); 2274 clear_pending (EV_A_ (W)w);
1471 if (expect_false (!ev_is_active (w))) 2275 if (expect_false (!ev_is_active (w)))
1472 return; 2276 return;
1473 2277
2278 EV_FREQUENT_CHECK;
2279
2280 {
2281 int active = ev_active (w);
2282
1474 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2283 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1475 2284
2285 --periodiccnt;
2286
1476 if (expect_true (((W)w)->active < periodiccnt--)) 2287 if (expect_true (active < periodiccnt + HEAP0))
1477 { 2288 {
1478 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2289 periodics [active] = periodics [periodiccnt + HEAP0];
1479 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2290 adjustheap (periodics, periodiccnt, active);
1480 } 2291 }
2292 }
2293
2294 EV_FREQUENT_CHECK;
1481 2295
1482 ev_stop (EV_A_ (W)w); 2296 ev_stop (EV_A_ (W)w);
1483} 2297}
1484 2298
1485void 2299void noinline
1486ev_periodic_again (EV_P_ struct ev_periodic *w) 2300ev_periodic_again (EV_P_ ev_periodic *w)
1487{ 2301{
1488 /* TODO: use adjustheap and recalculation */ 2302 /* TODO: use adjustheap and recalculation */
1489 ev_periodic_stop (EV_A_ w); 2303 ev_periodic_stop (EV_A_ w);
1490 ev_periodic_start (EV_A_ w); 2304 ev_periodic_start (EV_A_ w);
1491} 2305}
1492#endif 2306#endif
1493 2307
1494void 2308#ifndef SA_RESTART
1495ev_idle_start (EV_P_ struct ev_idle *w) 2309# define SA_RESTART 0
2310#endif
2311
2312void noinline
2313ev_signal_start (EV_P_ ev_signal *w)
1496{ 2314{
2315#if EV_MULTIPLICITY
2316 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2317#endif
1497 if (expect_false (ev_is_active (w))) 2318 if (expect_false (ev_is_active (w)))
1498 return; 2319 return;
1499 2320
1500 ev_start (EV_A_ (W)w, ++idlecnt);
1501 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1502 idles [idlecnt - 1] = w;
1503}
1504
1505void
1506ev_idle_stop (EV_P_ struct ev_idle *w)
1507{
1508 ev_clear_pending (EV_A_ (W)w);
1509 if (expect_false (!ev_is_active (w)))
1510 return;
1511
1512 idles [((W)w)->active - 1] = idles [--idlecnt];
1513 ev_stop (EV_A_ (W)w);
1514}
1515
1516void
1517ev_prepare_start (EV_P_ struct ev_prepare *w)
1518{
1519 if (expect_false (ev_is_active (w)))
1520 return;
1521
1522 ev_start (EV_A_ (W)w, ++preparecnt);
1523 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1524 prepares [preparecnt - 1] = w;
1525}
1526
1527void
1528ev_prepare_stop (EV_P_ struct ev_prepare *w)
1529{
1530 ev_clear_pending (EV_A_ (W)w);
1531 if (expect_false (!ev_is_active (w)))
1532 return;
1533
1534 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1535 ev_stop (EV_A_ (W)w);
1536}
1537
1538void
1539ev_check_start (EV_P_ struct ev_check *w)
1540{
1541 if (expect_false (ev_is_active (w)))
1542 return;
1543
1544 ev_start (EV_A_ (W)w, ++checkcnt);
1545 array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
1546 checks [checkcnt - 1] = w;
1547}
1548
1549void
1550ev_check_stop (EV_P_ struct ev_check *w)
1551{
1552 ev_clear_pending (EV_A_ (W)w);
1553 if (expect_false (!ev_is_active (w)))
1554 return;
1555
1556 checks [((W)w)->active - 1] = checks [--checkcnt];
1557 ev_stop (EV_A_ (W)w);
1558}
1559
1560#ifndef SA_RESTART
1561# define SA_RESTART 0
1562#endif
1563
1564void
1565ev_signal_start (EV_P_ struct ev_signal *w)
1566{
1567#if EV_MULTIPLICITY
1568 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1569#endif
1570 if (expect_false (ev_is_active (w)))
1571 return;
1572
1573 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2321 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1574 2322
2323 evpipe_init (EV_A);
2324
2325 EV_FREQUENT_CHECK;
2326
2327 {
2328#ifndef _WIN32
2329 sigset_t full, prev;
2330 sigfillset (&full);
2331 sigprocmask (SIG_SETMASK, &full, &prev);
2332#endif
2333
2334 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2335
2336#ifndef _WIN32
2337 sigprocmask (SIG_SETMASK, &prev, 0);
2338#endif
2339 }
2340
1575 ev_start (EV_A_ (W)w, 1); 2341 ev_start (EV_A_ (W)w, 1);
1576 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1577 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2342 wlist_add (&signals [w->signum - 1].head, (WL)w);
1578 2343
1579 if (!((WL)w)->next) 2344 if (!((WL)w)->next)
1580 { 2345 {
1581#if _WIN32 2346#if _WIN32
1582 signal (w->signum, sighandler); 2347 signal (w->signum, ev_sighandler);
1583#else 2348#else
1584 struct sigaction sa; 2349 struct sigaction sa;
1585 sa.sa_handler = sighandler; 2350 sa.sa_handler = ev_sighandler;
1586 sigfillset (&sa.sa_mask); 2351 sigfillset (&sa.sa_mask);
1587 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2352 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1588 sigaction (w->signum, &sa, 0); 2353 sigaction (w->signum, &sa, 0);
1589#endif 2354#endif
1590 } 2355 }
1591}
1592 2356
1593void 2357 EV_FREQUENT_CHECK;
2358}
2359
2360void noinline
1594ev_signal_stop (EV_P_ struct ev_signal *w) 2361ev_signal_stop (EV_P_ ev_signal *w)
1595{ 2362{
1596 ev_clear_pending (EV_A_ (W)w); 2363 clear_pending (EV_A_ (W)w);
1597 if (expect_false (!ev_is_active (w))) 2364 if (expect_false (!ev_is_active (w)))
1598 return; 2365 return;
1599 2366
2367 EV_FREQUENT_CHECK;
2368
1600 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2369 wlist_del (&signals [w->signum - 1].head, (WL)w);
1601 ev_stop (EV_A_ (W)w); 2370 ev_stop (EV_A_ (W)w);
1602 2371
1603 if (!signals [w->signum - 1].head) 2372 if (!signals [w->signum - 1].head)
1604 signal (w->signum, SIG_DFL); 2373 signal (w->signum, SIG_DFL);
1605}
1606 2374
2375 EV_FREQUENT_CHECK;
2376}
2377
1607void 2378void
1608ev_child_start (EV_P_ struct ev_child *w) 2379ev_child_start (EV_P_ ev_child *w)
1609{ 2380{
1610#if EV_MULTIPLICITY 2381#if EV_MULTIPLICITY
1611 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 2382 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1612#endif 2383#endif
1613 if (expect_false (ev_is_active (w))) 2384 if (expect_false (ev_is_active (w)))
1614 return; 2385 return;
1615 2386
2387 EV_FREQUENT_CHECK;
2388
1616 ev_start (EV_A_ (W)w, 1); 2389 ev_start (EV_A_ (W)w, 1);
1617 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2390 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1618}
1619 2391
2392 EV_FREQUENT_CHECK;
2393}
2394
1620void 2395void
1621ev_child_stop (EV_P_ struct ev_child *w) 2396ev_child_stop (EV_P_ ev_child *w)
1622{ 2397{
1623 ev_clear_pending (EV_A_ (W)w); 2398 clear_pending (EV_A_ (W)w);
1624 if (expect_false (!ev_is_active (w))) 2399 if (expect_false (!ev_is_active (w)))
1625 return; 2400 return;
1626 2401
2402 EV_FREQUENT_CHECK;
2403
1627 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2404 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1628 ev_stop (EV_A_ (W)w); 2405 ev_stop (EV_A_ (W)w);
2406
2407 EV_FREQUENT_CHECK;
1629} 2408}
2409
2410#if EV_STAT_ENABLE
2411
2412# ifdef _WIN32
2413# undef lstat
2414# define lstat(a,b) _stati64 (a,b)
2415# endif
2416
2417#define DEF_STAT_INTERVAL 5.0074891
2418#define MIN_STAT_INTERVAL 0.1074891
2419
2420static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2421
2422#if EV_USE_INOTIFY
2423# define EV_INOTIFY_BUFSIZE 8192
2424
2425static void noinline
2426infy_add (EV_P_ ev_stat *w)
2427{
2428 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
2429
2430 if (w->wd < 0)
2431 {
2432 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2433
2434 /* monitor some parent directory for speedup hints */
2435 /* note that exceeding the hardcoded limit is not a correctness issue, */
2436 /* but an efficiency issue only */
2437 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2438 {
2439 char path [4096];
2440 strcpy (path, w->path);
2441
2442 do
2443 {
2444 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2445 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2446
2447 char *pend = strrchr (path, '/');
2448
2449 if (!pend)
2450 break; /* whoops, no '/', complain to your admin */
2451
2452 *pend = 0;
2453 w->wd = inotify_add_watch (fs_fd, path, mask);
2454 }
2455 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2456 }
2457 }
2458 else
2459 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2460
2461 if (w->wd >= 0)
2462 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2463}
2464
2465static void noinline
2466infy_del (EV_P_ ev_stat *w)
2467{
2468 int slot;
2469 int wd = w->wd;
2470
2471 if (wd < 0)
2472 return;
2473
2474 w->wd = -2;
2475 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2476 wlist_del (&fs_hash [slot].head, (WL)w);
2477
2478 /* remove this watcher, if others are watching it, they will rearm */
2479 inotify_rm_watch (fs_fd, wd);
2480}
2481
2482static void noinline
2483infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2484{
2485 if (slot < 0)
2486 /* overflow, need to check for all hash slots */
2487 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2488 infy_wd (EV_A_ slot, wd, ev);
2489 else
2490 {
2491 WL w_;
2492
2493 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2494 {
2495 ev_stat *w = (ev_stat *)w_;
2496 w_ = w_->next; /* lets us remove this watcher and all before it */
2497
2498 if (w->wd == wd || wd == -1)
2499 {
2500 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2501 {
2502 w->wd = -1;
2503 infy_add (EV_A_ w); /* re-add, no matter what */
2504 }
2505
2506 stat_timer_cb (EV_A_ &w->timer, 0);
2507 }
2508 }
2509 }
2510}
2511
2512static void
2513infy_cb (EV_P_ ev_io *w, int revents)
2514{
2515 char buf [EV_INOTIFY_BUFSIZE];
2516 struct inotify_event *ev = (struct inotify_event *)buf;
2517 int ofs;
2518 int len = read (fs_fd, buf, sizeof (buf));
2519
2520 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2521 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2522}
2523
2524void inline_size
2525infy_init (EV_P)
2526{
2527 if (fs_fd != -2)
2528 return;
2529
2530 /* kernels < 2.6.25 are borked
2531 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2532 */
2533 {
2534 struct utsname buf;
2535 int major, minor, micro;
2536
2537 fs_fd = -1;
2538
2539 if (uname (&buf))
2540 return;
2541
2542 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2543 return;
2544
2545 if (major < 2
2546 || (major == 2 && minor < 6)
2547 || (major == 2 && minor == 6 && micro < 25))
2548 return;
2549 }
2550
2551 fs_fd = inotify_init ();
2552
2553 if (fs_fd >= 0)
2554 {
2555 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2556 ev_set_priority (&fs_w, EV_MAXPRI);
2557 ev_io_start (EV_A_ &fs_w);
2558 }
2559}
2560
2561void inline_size
2562infy_fork (EV_P)
2563{
2564 int slot;
2565
2566 if (fs_fd < 0)
2567 return;
2568
2569 close (fs_fd);
2570 fs_fd = inotify_init ();
2571
2572 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2573 {
2574 WL w_ = fs_hash [slot].head;
2575 fs_hash [slot].head = 0;
2576
2577 while (w_)
2578 {
2579 ev_stat *w = (ev_stat *)w_;
2580 w_ = w_->next; /* lets us add this watcher */
2581
2582 w->wd = -1;
2583
2584 if (fs_fd >= 0)
2585 infy_add (EV_A_ w); /* re-add, no matter what */
2586 else
2587 ev_timer_start (EV_A_ &w->timer);
2588 }
2589 }
2590}
2591
2592#endif
2593
2594#ifdef _WIN32
2595# define EV_LSTAT(p,b) _stati64 (p, b)
2596#else
2597# define EV_LSTAT(p,b) lstat (p, b)
2598#endif
2599
2600void
2601ev_stat_stat (EV_P_ ev_stat *w)
2602{
2603 if (lstat (w->path, &w->attr) < 0)
2604 w->attr.st_nlink = 0;
2605 else if (!w->attr.st_nlink)
2606 w->attr.st_nlink = 1;
2607}
2608
2609static void noinline
2610stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2611{
2612 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2613
2614 /* we copy this here each the time so that */
2615 /* prev has the old value when the callback gets invoked */
2616 w->prev = w->attr;
2617 ev_stat_stat (EV_A_ w);
2618
2619 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2620 if (
2621 w->prev.st_dev != w->attr.st_dev
2622 || w->prev.st_ino != w->attr.st_ino
2623 || w->prev.st_mode != w->attr.st_mode
2624 || w->prev.st_nlink != w->attr.st_nlink
2625 || w->prev.st_uid != w->attr.st_uid
2626 || w->prev.st_gid != w->attr.st_gid
2627 || w->prev.st_rdev != w->attr.st_rdev
2628 || w->prev.st_size != w->attr.st_size
2629 || w->prev.st_atime != w->attr.st_atime
2630 || w->prev.st_mtime != w->attr.st_mtime
2631 || w->prev.st_ctime != w->attr.st_ctime
2632 ) {
2633 #if EV_USE_INOTIFY
2634 if (fs_fd >= 0)
2635 {
2636 infy_del (EV_A_ w);
2637 infy_add (EV_A_ w);
2638 ev_stat_stat (EV_A_ w); /* avoid race... */
2639 }
2640 #endif
2641
2642 ev_feed_event (EV_A_ w, EV_STAT);
2643 }
2644}
2645
2646void
2647ev_stat_start (EV_P_ ev_stat *w)
2648{
2649 if (expect_false (ev_is_active (w)))
2650 return;
2651
2652 /* since we use memcmp, we need to clear any padding data etc. */
2653 memset (&w->prev, 0, sizeof (ev_statdata));
2654 memset (&w->attr, 0, sizeof (ev_statdata));
2655
2656 ev_stat_stat (EV_A_ w);
2657
2658 if (w->interval < MIN_STAT_INTERVAL)
2659 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2660
2661 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2662 ev_set_priority (&w->timer, ev_priority (w));
2663
2664#if EV_USE_INOTIFY
2665 infy_init (EV_A);
2666
2667 if (fs_fd >= 0)
2668 infy_add (EV_A_ w);
2669 else
2670#endif
2671 ev_timer_start (EV_A_ &w->timer);
2672
2673 ev_start (EV_A_ (W)w, 1);
2674
2675 EV_FREQUENT_CHECK;
2676}
2677
2678void
2679ev_stat_stop (EV_P_ ev_stat *w)
2680{
2681 clear_pending (EV_A_ (W)w);
2682 if (expect_false (!ev_is_active (w)))
2683 return;
2684
2685 EV_FREQUENT_CHECK;
2686
2687#if EV_USE_INOTIFY
2688 infy_del (EV_A_ w);
2689#endif
2690 ev_timer_stop (EV_A_ &w->timer);
2691
2692 ev_stop (EV_A_ (W)w);
2693
2694 EV_FREQUENT_CHECK;
2695}
2696#endif
2697
2698#if EV_IDLE_ENABLE
2699void
2700ev_idle_start (EV_P_ ev_idle *w)
2701{
2702 if (expect_false (ev_is_active (w)))
2703 return;
2704
2705 pri_adjust (EV_A_ (W)w);
2706
2707 EV_FREQUENT_CHECK;
2708
2709 {
2710 int active = ++idlecnt [ABSPRI (w)];
2711
2712 ++idleall;
2713 ev_start (EV_A_ (W)w, active);
2714
2715 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2716 idles [ABSPRI (w)][active - 1] = w;
2717 }
2718
2719 EV_FREQUENT_CHECK;
2720}
2721
2722void
2723ev_idle_stop (EV_P_ ev_idle *w)
2724{
2725 clear_pending (EV_A_ (W)w);
2726 if (expect_false (!ev_is_active (w)))
2727 return;
2728
2729 EV_FREQUENT_CHECK;
2730
2731 {
2732 int active = ev_active (w);
2733
2734 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2735 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2736
2737 ev_stop (EV_A_ (W)w);
2738 --idleall;
2739 }
2740
2741 EV_FREQUENT_CHECK;
2742}
2743#endif
2744
2745void
2746ev_prepare_start (EV_P_ ev_prepare *w)
2747{
2748 if (expect_false (ev_is_active (w)))
2749 return;
2750
2751 EV_FREQUENT_CHECK;
2752
2753 ev_start (EV_A_ (W)w, ++preparecnt);
2754 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2755 prepares [preparecnt - 1] = w;
2756
2757 EV_FREQUENT_CHECK;
2758}
2759
2760void
2761ev_prepare_stop (EV_P_ ev_prepare *w)
2762{
2763 clear_pending (EV_A_ (W)w);
2764 if (expect_false (!ev_is_active (w)))
2765 return;
2766
2767 EV_FREQUENT_CHECK;
2768
2769 {
2770 int active = ev_active (w);
2771
2772 prepares [active - 1] = prepares [--preparecnt];
2773 ev_active (prepares [active - 1]) = active;
2774 }
2775
2776 ev_stop (EV_A_ (W)w);
2777
2778 EV_FREQUENT_CHECK;
2779}
2780
2781void
2782ev_check_start (EV_P_ ev_check *w)
2783{
2784 if (expect_false (ev_is_active (w)))
2785 return;
2786
2787 EV_FREQUENT_CHECK;
2788
2789 ev_start (EV_A_ (W)w, ++checkcnt);
2790 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2791 checks [checkcnt - 1] = w;
2792
2793 EV_FREQUENT_CHECK;
2794}
2795
2796void
2797ev_check_stop (EV_P_ ev_check *w)
2798{
2799 clear_pending (EV_A_ (W)w);
2800 if (expect_false (!ev_is_active (w)))
2801 return;
2802
2803 EV_FREQUENT_CHECK;
2804
2805 {
2806 int active = ev_active (w);
2807
2808 checks [active - 1] = checks [--checkcnt];
2809 ev_active (checks [active - 1]) = active;
2810 }
2811
2812 ev_stop (EV_A_ (W)w);
2813
2814 EV_FREQUENT_CHECK;
2815}
2816
2817#if EV_EMBED_ENABLE
2818void noinline
2819ev_embed_sweep (EV_P_ ev_embed *w)
2820{
2821 ev_loop (w->other, EVLOOP_NONBLOCK);
2822}
2823
2824static void
2825embed_io_cb (EV_P_ ev_io *io, int revents)
2826{
2827 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2828
2829 if (ev_cb (w))
2830 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2831 else
2832 ev_loop (w->other, EVLOOP_NONBLOCK);
2833}
2834
2835static void
2836embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2837{
2838 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2839
2840 {
2841 struct ev_loop *loop = w->other;
2842
2843 while (fdchangecnt)
2844 {
2845 fd_reify (EV_A);
2846 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2847 }
2848 }
2849}
2850
2851static void
2852embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2853{
2854 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2855
2856 {
2857 struct ev_loop *loop = w->other;
2858
2859 ev_loop_fork (EV_A);
2860 }
2861}
2862
2863#if 0
2864static void
2865embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2866{
2867 ev_idle_stop (EV_A_ idle);
2868}
2869#endif
2870
2871void
2872ev_embed_start (EV_P_ ev_embed *w)
2873{
2874 if (expect_false (ev_is_active (w)))
2875 return;
2876
2877 {
2878 struct ev_loop *loop = w->other;
2879 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2880 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2881 }
2882
2883 EV_FREQUENT_CHECK;
2884
2885 ev_set_priority (&w->io, ev_priority (w));
2886 ev_io_start (EV_A_ &w->io);
2887
2888 ev_prepare_init (&w->prepare, embed_prepare_cb);
2889 ev_set_priority (&w->prepare, EV_MINPRI);
2890 ev_prepare_start (EV_A_ &w->prepare);
2891
2892 ev_fork_init (&w->fork, embed_fork_cb);
2893 ev_fork_start (EV_A_ &w->fork);
2894
2895 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2896
2897 ev_start (EV_A_ (W)w, 1);
2898
2899 EV_FREQUENT_CHECK;
2900}
2901
2902void
2903ev_embed_stop (EV_P_ ev_embed *w)
2904{
2905 clear_pending (EV_A_ (W)w);
2906 if (expect_false (!ev_is_active (w)))
2907 return;
2908
2909 EV_FREQUENT_CHECK;
2910
2911 ev_io_stop (EV_A_ &w->io);
2912 ev_prepare_stop (EV_A_ &w->prepare);
2913 ev_fork_stop (EV_A_ &w->fork);
2914
2915 EV_FREQUENT_CHECK;
2916}
2917#endif
2918
2919#if EV_FORK_ENABLE
2920void
2921ev_fork_start (EV_P_ ev_fork *w)
2922{
2923 if (expect_false (ev_is_active (w)))
2924 return;
2925
2926 EV_FREQUENT_CHECK;
2927
2928 ev_start (EV_A_ (W)w, ++forkcnt);
2929 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2930 forks [forkcnt - 1] = w;
2931
2932 EV_FREQUENT_CHECK;
2933}
2934
2935void
2936ev_fork_stop (EV_P_ ev_fork *w)
2937{
2938 clear_pending (EV_A_ (W)w);
2939 if (expect_false (!ev_is_active (w)))
2940 return;
2941
2942 EV_FREQUENT_CHECK;
2943
2944 {
2945 int active = ev_active (w);
2946
2947 forks [active - 1] = forks [--forkcnt];
2948 ev_active (forks [active - 1]) = active;
2949 }
2950
2951 ev_stop (EV_A_ (W)w);
2952
2953 EV_FREQUENT_CHECK;
2954}
2955#endif
2956
2957#if EV_ASYNC_ENABLE
2958void
2959ev_async_start (EV_P_ ev_async *w)
2960{
2961 if (expect_false (ev_is_active (w)))
2962 return;
2963
2964 evpipe_init (EV_A);
2965
2966 EV_FREQUENT_CHECK;
2967
2968 ev_start (EV_A_ (W)w, ++asynccnt);
2969 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2970 asyncs [asynccnt - 1] = w;
2971
2972 EV_FREQUENT_CHECK;
2973}
2974
2975void
2976ev_async_stop (EV_P_ ev_async *w)
2977{
2978 clear_pending (EV_A_ (W)w);
2979 if (expect_false (!ev_is_active (w)))
2980 return;
2981
2982 EV_FREQUENT_CHECK;
2983
2984 {
2985 int active = ev_active (w);
2986
2987 asyncs [active - 1] = asyncs [--asynccnt];
2988 ev_active (asyncs [active - 1]) = active;
2989 }
2990
2991 ev_stop (EV_A_ (W)w);
2992
2993 EV_FREQUENT_CHECK;
2994}
2995
2996void
2997ev_async_send (EV_P_ ev_async *w)
2998{
2999 w->sent = 1;
3000 evpipe_write (EV_A_ &gotasync);
3001}
3002#endif
1630 3003
1631/*****************************************************************************/ 3004/*****************************************************************************/
1632 3005
1633struct ev_once 3006struct ev_once
1634{ 3007{
1635 struct ev_io io; 3008 ev_io io;
1636 struct ev_timer to; 3009 ev_timer to;
1637 void (*cb)(int revents, void *arg); 3010 void (*cb)(int revents, void *arg);
1638 void *arg; 3011 void *arg;
1639}; 3012};
1640 3013
1641static void 3014static void
1642once_cb (EV_P_ struct ev_once *once, int revents) 3015once_cb (EV_P_ struct ev_once *once, int revents)
1643{ 3016{
1644 void (*cb)(int revents, void *arg) = once->cb; 3017 void (*cb)(int revents, void *arg) = once->cb;
1645 void *arg = once->arg; 3018 void *arg = once->arg;
1646 3019
1647 ev_io_stop (EV_A_ &once->io); 3020 ev_io_stop (EV_A_ &once->io);
1648 ev_timer_stop (EV_A_ &once->to); 3021 ev_timer_stop (EV_A_ &once->to);
1649 ev_free (once); 3022 ev_free (once);
1650 3023
1651 cb (revents, arg); 3024 cb (revents, arg);
1652} 3025}
1653 3026
1654static void 3027static void
1655once_cb_io (EV_P_ struct ev_io *w, int revents) 3028once_cb_io (EV_P_ ev_io *w, int revents)
1656{ 3029{
1657 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3030 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3031
3032 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1658} 3033}
1659 3034
1660static void 3035static void
1661once_cb_to (EV_P_ struct ev_timer *w, int revents) 3036once_cb_to (EV_P_ ev_timer *w, int revents)
1662{ 3037{
1663 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3038 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3039
3040 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1664} 3041}
1665 3042
1666void 3043void
1667ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3044ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1668{ 3045{
… …
1690 ev_timer_set (&once->to, timeout, 0.); 3067 ev_timer_set (&once->to, timeout, 0.);
1691 ev_timer_start (EV_A_ &once->to); 3068 ev_timer_start (EV_A_ &once->to);
1692 } 3069 }
1693} 3070}
1694 3071
3072#if EV_MULTIPLICITY
3073 #include "ev_wrap.h"
3074#endif
3075
1695#ifdef __cplusplus 3076#ifdef __cplusplus
1696} 3077}
1697#endif 3078#endif
1698 3079

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines