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Comparing libev/ev.c (file contents):
Revision 1.115 by root, Wed Nov 14 04:53:21 2007 UTC vs.
Revision 1.256 by root, Thu Jun 19 06:53:49 2008 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
31 39
32#ifdef __cplusplus 40#ifdef __cplusplus
33extern "C" { 41extern "C" {
34#endif 42#endif
35 43
44/* this big block deduces configuration from config.h */
36#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
37# include "config.h" 49# include "config.h"
50# endif
38 51
39# if HAVE_CLOCK_GETTIME 52# if HAVE_CLOCK_GETTIME
40# ifndef EV_USE_MONOTONIC 53# ifndef EV_USE_MONOTONIC
41# define EV_USE_MONOTONIC 1 54# define EV_USE_MONOTONIC 1
42# endif 55# endif
43# ifndef EV_USE_REALTIME 56# ifndef EV_USE_REALTIME
44# define EV_USE_REALTIME 1 57# define EV_USE_REALTIME 1
45# endif 58# endif
59# else
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0
62# endif
63# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0
65# endif
46# endif 66# endif
47 67
48# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT) 68# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
49# define EV_USE_SELECT 1 70# define EV_USE_NANOSLEEP 1
71# else
72# define EV_USE_NANOSLEEP 0
73# endif
50# endif 74# endif
51 75
52# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL) 76# ifndef EV_USE_SELECT
77# if HAVE_SELECT && HAVE_SYS_SELECT_H
53# define EV_USE_POLL 1 78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif
54# endif 82# endif
55 83
56# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL) 84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
57# define EV_USE_EPOLL 1 86# define EV_USE_POLL 1
87# else
88# define EV_USE_POLL 0
89# endif
58# endif 90# endif
59 91
60# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE) 92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
61# define EV_USE_KQUEUE 1 94# define EV_USE_EPOLL 1
95# else
96# define EV_USE_EPOLL 0
97# endif
62# endif 98# endif
99
100# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif
106# endif
107
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1
111# else
112# define EV_USE_PORT 0
113# endif
114# endif
63 115
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1
119# else
120# define EV_USE_INOTIFY 0
121# endif
122# endif
123
124# ifndef EV_USE_EVENTFD
125# if HAVE_EVENTFD
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif
130# endif
131
64#endif 132#endif
65 133
66#include <math.h> 134#include <math.h>
67#include <stdlib.h> 135#include <stdlib.h>
68#include <fcntl.h> 136#include <fcntl.h>
… …
75#include <sys/types.h> 143#include <sys/types.h>
76#include <time.h> 144#include <time.h>
77 145
78#include <signal.h> 146#include <signal.h>
79 147
148#ifdef EV_H
149# include EV_H
150#else
151# include "ev.h"
152#endif
153
80#ifndef _WIN32 154#ifndef _WIN32
81# include <unistd.h>
82# include <sys/time.h> 155# include <sys/time.h>
83# include <sys/wait.h> 156# include <sys/wait.h>
157# include <unistd.h>
84#else 158#else
159# include <io.h>
85# define WIN32_LEAN_AND_MEAN 160# define WIN32_LEAN_AND_MEAN
86# include <windows.h> 161# include <windows.h>
87# ifndef EV_SELECT_IS_WINSOCKET 162# ifndef EV_SELECT_IS_WINSOCKET
88# define EV_SELECT_IS_WINSOCKET 1 163# define EV_SELECT_IS_WINSOCKET 1
89# endif 164# endif
90#endif 165#endif
91 166
92/**/ 167/* this block tries to deduce configuration from header-defined symbols and defaults */
93 168
94#ifndef EV_USE_MONOTONIC 169#ifndef EV_USE_MONOTONIC
170# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
95# define EV_USE_MONOTONIC 1 171# define EV_USE_MONOTONIC 1
172# else
173# define EV_USE_MONOTONIC 0
174# endif
175#endif
176
177#ifndef EV_USE_REALTIME
178# define EV_USE_REALTIME 0
179#endif
180
181#ifndef EV_USE_NANOSLEEP
182# if _POSIX_C_SOURCE >= 199309L
183# define EV_USE_NANOSLEEP 1
184# else
185# define EV_USE_NANOSLEEP 0
186# endif
96#endif 187#endif
97 188
98#ifndef EV_USE_SELECT 189#ifndef EV_USE_SELECT
99# define EV_USE_SELECT 1 190# define EV_USE_SELECT 1
100# define EV_SELECT_USE_FD_SET 1
101#endif 191#endif
102 192
103#ifndef EV_USE_POLL 193#ifndef EV_USE_POLL
104# ifdef _WIN32 194# ifdef _WIN32
105# define EV_USE_POLL 0 195# define EV_USE_POLL 0
… …
107# define EV_USE_POLL 1 197# define EV_USE_POLL 1
108# endif 198# endif
109#endif 199#endif
110 200
111#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
112# define EV_USE_EPOLL 0 205# define EV_USE_EPOLL 0
206# endif
113#endif 207#endif
114 208
115#ifndef EV_USE_KQUEUE 209#ifndef EV_USE_KQUEUE
116# define EV_USE_KQUEUE 0 210# define EV_USE_KQUEUE 0
117#endif 211#endif
118 212
119#ifndef EV_USE_REALTIME 213#ifndef EV_USE_PORT
214# define EV_USE_PORT 0
215#endif
216
217#ifndef EV_USE_INOTIFY
218# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
120# define EV_USE_REALTIME 1 219# define EV_USE_INOTIFY 1
220# else
221# define EV_USE_INOTIFY 0
121#endif 222# endif
223#endif
122 224
123/**/ 225#ifndef EV_PID_HASHSIZE
124 226# if EV_MINIMAL
125/* darwin simply cannot be helped */ 227# define EV_PID_HASHSIZE 1
126#ifdef __APPLE__ 228# else
127# undef EV_USE_POLL 229# define EV_PID_HASHSIZE 16
128# undef EV_USE_KQUEUE
129#endif 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 */
130 268
131#ifndef CLOCK_MONOTONIC 269#ifndef CLOCK_MONOTONIC
132# undef EV_USE_MONOTONIC 270# undef EV_USE_MONOTONIC
133# define EV_USE_MONOTONIC 0 271# define EV_USE_MONOTONIC 0
134#endif 272#endif
… …
136#ifndef CLOCK_REALTIME 274#ifndef CLOCK_REALTIME
137# undef EV_USE_REALTIME 275# undef EV_USE_REALTIME
138# define EV_USE_REALTIME 0 276# define EV_USE_REALTIME 0
139#endif 277#endif
140 278
279#if !EV_STAT_ENABLE
280# undef EV_USE_INOTIFY
281# define EV_USE_INOTIFY 0
282#endif
283
284#if !EV_USE_NANOSLEEP
285# ifndef _WIN32
286# include <sys/select.h>
287# endif
288#endif
289
290#if EV_USE_INOTIFY
291# include <sys/inotify.h>
292#endif
293
141#if EV_SELECT_IS_WINSOCKET 294#if EV_SELECT_IS_WINSOCKET
142# include <winsock.h> 295# include <winsock.h>
143#endif 296#endif
144 297
298#if EV_USE_EVENTFD
299/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
300# include <stdint.h>
301# ifdef __cplusplus
302extern "C" {
303# endif
304int eventfd (unsigned int initval, int flags);
305# ifdef __cplusplus
306}
307# endif
308#endif
309
145/**/ 310/**/
146 311
312#if EV_VERIFY >= 3
313# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
314#else
315# define EV_FREQUENT_CHECK do { } while (0)
316#endif
317
318/*
319 * This is used to avoid floating point rounding problems.
320 * It is added to ev_rt_now when scheduling periodics
321 * to ensure progress, time-wise, even when rounding
322 * errors are against us.
323 * This value is good at least till the year 4000.
324 * Better solutions welcome.
325 */
326#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
327
147#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 328#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
148#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 329#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
149#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
150/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ 330/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
151 331
152#ifdef EV_H
153# include EV_H
154#else
155# include "ev.h"
156#endif
157
158#if __GNUC__ >= 3 332#if __GNUC__ >= 4
159# define expect(expr,value) __builtin_expect ((expr),(value)) 333# define expect(expr,value) __builtin_expect ((expr),(value))
160# define inline inline 334# define noinline __attribute__ ((noinline))
161#else 335#else
162# define expect(expr,value) (expr) 336# define expect(expr,value) (expr)
163# define inline static 337# define noinline
338# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
339# define inline
340# endif
164#endif 341#endif
165 342
166#define expect_false(expr) expect ((expr) != 0, 0) 343#define expect_false(expr) expect ((expr) != 0, 0)
167#define expect_true(expr) expect ((expr) != 0, 1) 344#define expect_true(expr) expect ((expr) != 0, 1)
345#define inline_size static inline
346
347#if EV_MINIMAL
348# define inline_speed static noinline
349#else
350# define inline_speed static inline
351#endif
168 352
169#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 353#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
170#define ABSPRI(w) ((w)->priority - EV_MINPRI) 354#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
171 355
172#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ 356#define EMPTY /* required for microsofts broken pseudo-c compiler */
173#define EMPTY2(a,b) /* used to suppress some warnings */ 357#define EMPTY2(a,b) /* used to suppress some warnings */
174 358
175typedef struct ev_watcher *W; 359typedef ev_watcher *W;
176typedef struct ev_watcher_list *WL; 360typedef ev_watcher_list *WL;
177typedef struct ev_watcher_time *WT; 361typedef ev_watcher_time *WT;
178 362
363#define ev_active(w) ((W)(w))->active
364#define ev_at(w) ((WT)(w))->at
365
366#if EV_USE_MONOTONIC
367/* sig_atomic_t is used to avoid per-thread variables or locking but still */
368/* giving it a reasonably high chance of working on typical architetcures */
179static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 369static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
370#endif
180 371
181#ifdef _WIN32 372#ifdef _WIN32
182# include "ev_win32.c" 373# include "ev_win32.c"
183#endif 374#endif
184 375
185/*****************************************************************************/ 376/*****************************************************************************/
186 377
187static void (*syserr_cb)(const char *msg); 378static void (*syserr_cb)(const char *msg);
188 379
380void
189void ev_set_syserr_cb (void (*cb)(const char *msg)) 381ev_set_syserr_cb (void (*cb)(const char *msg))
190{ 382{
191 syserr_cb = cb; 383 syserr_cb = cb;
192} 384}
193 385
194static void 386static void noinline
195syserr (const char *msg) 387syserr (const char *msg)
196{ 388{
197 if (!msg) 389 if (!msg)
198 msg = "(libev) system error"; 390 msg = "(libev) system error";
199 391
… …
204 perror (msg); 396 perror (msg);
205 abort (); 397 abort ();
206 } 398 }
207} 399}
208 400
401static void *
402ev_realloc_emul (void *ptr, long size)
403{
404 /* some systems, notably openbsd and darwin, fail to properly
405 * implement realloc (x, 0) (as required by both ansi c-98 and
406 * the single unix specification, so work around them here.
407 */
408
409 if (size)
410 return realloc (ptr, size);
411
412 free (ptr);
413 return 0;
414}
415
209static void *(*alloc)(void *ptr, long size); 416static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
210 417
418void
211void ev_set_allocator (void *(*cb)(void *ptr, long size)) 419ev_set_allocator (void *(*cb)(void *ptr, long size))
212{ 420{
213 alloc = cb; 421 alloc = cb;
214} 422}
215 423
216static void * 424inline_speed void *
217ev_realloc (void *ptr, long size) 425ev_realloc (void *ptr, long size)
218{ 426{
219 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 427 ptr = alloc (ptr, size);
220 428
221 if (!ptr && size) 429 if (!ptr && size)
222 { 430 {
223 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 431 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
224 abort (); 432 abort ();
… …
245typedef struct 453typedef struct
246{ 454{
247 W w; 455 W w;
248 int events; 456 int events;
249} ANPENDING; 457} ANPENDING;
458
459#if EV_USE_INOTIFY
460/* hash table entry per inotify-id */
461typedef struct
462{
463 WL head;
464} ANFS;
465#endif
466
467/* Heap Entry */
468#if EV_HEAP_CACHE_AT
469 typedef struct {
470 ev_tstamp at;
471 WT w;
472 } ANHE;
473
474 #define ANHE_w(he) (he).w /* access watcher, read-write */
475 #define ANHE_at(he) (he).at /* access cached at, read-only */
476 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
477#else
478 typedef WT ANHE;
479
480 #define ANHE_w(he) (he)
481 #define ANHE_at(he) (he)->at
482 #define ANHE_at_cache(he)
483#endif
250 484
251#if EV_MULTIPLICITY 485#if EV_MULTIPLICITY
252 486
253 struct ev_loop 487 struct ev_loop
254 { 488 {
… …
258 #include "ev_vars.h" 492 #include "ev_vars.h"
259 #undef VAR 493 #undef VAR
260 }; 494 };
261 #include "ev_wrap.h" 495 #include "ev_wrap.h"
262 496
263 struct ev_loop default_loop_struct; 497 static struct ev_loop default_loop_struct;
264 static struct ev_loop *default_loop; 498 struct ev_loop *ev_default_loop_ptr;
265 499
266#else 500#else
267 501
268 ev_tstamp ev_rt_now; 502 ev_tstamp ev_rt_now;
269 #define VAR(name,decl) static decl; 503 #define VAR(name,decl) static decl;
270 #include "ev_vars.h" 504 #include "ev_vars.h"
271 #undef VAR 505 #undef VAR
272 506
273 static int default_loop; 507 static int ev_default_loop_ptr;
274 508
275#endif 509#endif
276 510
277/*****************************************************************************/ 511/*****************************************************************************/
278 512
… …
288 gettimeofday (&tv, 0); 522 gettimeofday (&tv, 0);
289 return tv.tv_sec + tv.tv_usec * 1e-6; 523 return tv.tv_sec + tv.tv_usec * 1e-6;
290#endif 524#endif
291} 525}
292 526
293inline ev_tstamp 527ev_tstamp inline_size
294get_clock (void) 528get_clock (void)
295{ 529{
296#if EV_USE_MONOTONIC 530#if EV_USE_MONOTONIC
297 if (expect_true (have_monotonic)) 531 if (expect_true (have_monotonic))
298 { 532 {
… …
311{ 545{
312 return ev_rt_now; 546 return ev_rt_now;
313} 547}
314#endif 548#endif
315 549
316#define array_roundsize(type,n) (((n) | 4) & ~3) 550void
551ev_sleep (ev_tstamp delay)
552{
553 if (delay > 0.)
554 {
555#if EV_USE_NANOSLEEP
556 struct timespec ts;
557
558 ts.tv_sec = (time_t)delay;
559 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
560
561 nanosleep (&ts, 0);
562#elif defined(_WIN32)
563 Sleep ((unsigned long)(delay * 1e3));
564#else
565 struct timeval tv;
566
567 tv.tv_sec = (time_t)delay;
568 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
569
570 select (0, 0, 0, 0, &tv);
571#endif
572 }
573}
574
575/*****************************************************************************/
576
577#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
578
579int inline_size
580array_nextsize (int elem, int cur, int cnt)
581{
582 int ncur = cur + 1;
583
584 do
585 ncur <<= 1;
586 while (cnt > ncur);
587
588 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
589 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
590 {
591 ncur *= elem;
592 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
593 ncur = ncur - sizeof (void *) * 4;
594 ncur /= elem;
595 }
596
597 return ncur;
598}
599
600static noinline void *
601array_realloc (int elem, void *base, int *cur, int cnt)
602{
603 *cur = array_nextsize (elem, *cur, cnt);
604 return ev_realloc (base, elem * *cur);
605}
317 606
318#define array_needsize(type,base,cur,cnt,init) \ 607#define array_needsize(type,base,cur,cnt,init) \
319 if (expect_false ((cnt) > cur)) \ 608 if (expect_false ((cnt) > (cur))) \
320 { \ 609 { \
321 int newcnt = cur; \ 610 int ocur_ = (cur); \
322 do \ 611 (base) = (type *)array_realloc \
323 { \ 612 (sizeof (type), (base), &(cur), (cnt)); \
324 newcnt = array_roundsize (type, newcnt << 1); \ 613 init ((base) + (ocur_), (cur) - ocur_); \
325 } \
326 while ((cnt) > newcnt); \
327 \
328 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
329 init (base + cur, newcnt - cur); \
330 cur = newcnt; \
331 } 614 }
332 615
616#if 0
333#define array_slim(type,stem) \ 617#define array_slim(type,stem) \
334 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 618 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
335 { \ 619 { \
336 stem ## max = array_roundsize (stem ## cnt >> 1); \ 620 stem ## max = array_roundsize (stem ## cnt >> 1); \
337 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 621 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
338 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 622 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
339 } 623 }
624#endif
340 625
341#define array_free(stem, idx) \ 626#define array_free(stem, idx) \
342 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 627 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
343 628
344/*****************************************************************************/ 629/*****************************************************************************/
345 630
346static void 631void noinline
632ev_feed_event (EV_P_ void *w, int revents)
633{
634 W w_ = (W)w;
635 int pri = ABSPRI (w_);
636
637 if (expect_false (w_->pending))
638 pendings [pri][w_->pending - 1].events |= revents;
639 else
640 {
641 w_->pending = ++pendingcnt [pri];
642 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
643 pendings [pri][w_->pending - 1].w = w_;
644 pendings [pri][w_->pending - 1].events = revents;
645 }
646}
647
648void inline_speed
649queue_events (EV_P_ W *events, int eventcnt, int type)
650{
651 int i;
652
653 for (i = 0; i < eventcnt; ++i)
654 ev_feed_event (EV_A_ events [i], type);
655}
656
657/*****************************************************************************/
658
659void inline_size
347anfds_init (ANFD *base, int count) 660anfds_init (ANFD *base, int count)
348{ 661{
349 while (count--) 662 while (count--)
350 { 663 {
351 base->head = 0; 664 base->head = 0;
… …
354 667
355 ++base; 668 ++base;
356 } 669 }
357} 670}
358 671
359void 672void inline_speed
360ev_feed_event (EV_P_ void *w, int revents)
361{
362 W w_ = (W)w;
363
364 if (w_->pending)
365 {
366 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
367 return;
368 }
369
370 w_->pending = ++pendingcnt [ABSPRI (w_)];
371 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
372 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
373 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
374}
375
376static void
377queue_events (EV_P_ W *events, int eventcnt, int type)
378{
379 int i;
380
381 for (i = 0; i < eventcnt; ++i)
382 ev_feed_event (EV_A_ events [i], type);
383}
384
385inline void
386fd_event (EV_P_ int fd, int revents) 673fd_event (EV_P_ int fd, int revents)
387{ 674{
388 ANFD *anfd = anfds + fd; 675 ANFD *anfd = anfds + fd;
389 struct ev_io *w; 676 ev_io *w;
390 677
391 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 678 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
392 { 679 {
393 int ev = w->events & revents; 680 int ev = w->events & revents;
394 681
395 if (ev) 682 if (ev)
396 ev_feed_event (EV_A_ (W)w, ev); 683 ev_feed_event (EV_A_ (W)w, ev);
… …
398} 685}
399 686
400void 687void
401ev_feed_fd_event (EV_P_ int fd, int revents) 688ev_feed_fd_event (EV_P_ int fd, int revents)
402{ 689{
690 if (fd >= 0 && fd < anfdmax)
403 fd_event (EV_A_ fd, revents); 691 fd_event (EV_A_ fd, revents);
404} 692}
405 693
406/*****************************************************************************/ 694void inline_size
407
408static void
409fd_reify (EV_P) 695fd_reify (EV_P)
410{ 696{
411 int i; 697 int i;
412 698
413 for (i = 0; i < fdchangecnt; ++i) 699 for (i = 0; i < fdchangecnt; ++i)
414 { 700 {
415 int fd = fdchanges [i]; 701 int fd = fdchanges [i];
416 ANFD *anfd = anfds + fd; 702 ANFD *anfd = anfds + fd;
417 struct ev_io *w; 703 ev_io *w;
418 704
419 int events = 0; 705 unsigned char events = 0;
420 706
421 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 707 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
422 events |= w->events; 708 events |= (unsigned char)w->events;
423 709
424#if EV_SELECT_IS_WINSOCKET 710#if EV_SELECT_IS_WINSOCKET
425 if (events) 711 if (events)
426 { 712 {
427 unsigned long argp; 713 unsigned long arg;
714 #ifdef EV_FD_TO_WIN32_HANDLE
715 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
716 #else
428 anfd->handle = _get_osfhandle (fd); 717 anfd->handle = _get_osfhandle (fd);
718 #endif
429 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 719 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
430 } 720 }
431#endif 721#endif
432 722
723 {
724 unsigned char o_events = anfd->events;
725 unsigned char o_reify = anfd->reify;
726
433 anfd->reify = 0; 727 anfd->reify = 0;
434
435 method_modify (EV_A_ fd, anfd->events, events);
436 anfd->events = events; 728 anfd->events = events;
729
730 if (o_events != events || o_reify & EV_IOFDSET)
731 backend_modify (EV_A_ fd, o_events, events);
732 }
437 } 733 }
438 734
439 fdchangecnt = 0; 735 fdchangecnt = 0;
440} 736}
441 737
442static void 738void inline_size
443fd_change (EV_P_ int fd) 739fd_change (EV_P_ int fd, int flags)
444{ 740{
445 if (anfds [fd].reify) 741 unsigned char reify = anfds [fd].reify;
446 return;
447
448 anfds [fd].reify = 1; 742 anfds [fd].reify |= flags;
449 743
744 if (expect_true (!reify))
745 {
450 ++fdchangecnt; 746 ++fdchangecnt;
451 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 747 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
452 fdchanges [fdchangecnt - 1] = fd; 748 fdchanges [fdchangecnt - 1] = fd;
749 }
453} 750}
454 751
455static void 752void inline_speed
456fd_kill (EV_P_ int fd) 753fd_kill (EV_P_ int fd)
457{ 754{
458 struct ev_io *w; 755 ev_io *w;
459 756
460 while ((w = (struct ev_io *)anfds [fd].head)) 757 while ((w = (ev_io *)anfds [fd].head))
461 { 758 {
462 ev_io_stop (EV_A_ w); 759 ev_io_stop (EV_A_ w);
463 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 760 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
464 } 761 }
465} 762}
466 763
467static int 764int inline_size
468fd_valid (int fd) 765fd_valid (int fd)
469{ 766{
470#ifdef _WIN32 767#ifdef _WIN32
471 return _get_osfhandle (fd) != -1; 768 return _get_osfhandle (fd) != -1;
472#else 769#else
473 return fcntl (fd, F_GETFD) != -1; 770 return fcntl (fd, F_GETFD) != -1;
474#endif 771#endif
475} 772}
476 773
477/* called on EBADF to verify fds */ 774/* called on EBADF to verify fds */
478static void 775static void noinline
479fd_ebadf (EV_P) 776fd_ebadf (EV_P)
480{ 777{
481 int fd; 778 int fd;
482 779
483 for (fd = 0; fd < anfdmax; ++fd) 780 for (fd = 0; fd < anfdmax; ++fd)
484 if (anfds [fd].events) 781 if (anfds [fd].events)
485 if (!fd_valid (fd) == -1 && errno == EBADF) 782 if (!fd_valid (fd) && errno == EBADF)
486 fd_kill (EV_A_ fd); 783 fd_kill (EV_A_ fd);
487} 784}
488 785
489/* called on ENOMEM in select/poll to kill some fds and retry */ 786/* called on ENOMEM in select/poll to kill some fds and retry */
490static void 787static void noinline
491fd_enomem (EV_P) 788fd_enomem (EV_P)
492{ 789{
493 int fd; 790 int fd;
494 791
495 for (fd = anfdmax; fd--; ) 792 for (fd = anfdmax; fd--; )
… …
498 fd_kill (EV_A_ fd); 795 fd_kill (EV_A_ fd);
499 return; 796 return;
500 } 797 }
501} 798}
502 799
503/* usually called after fork if method needs to re-arm all fds from scratch */ 800/* usually called after fork if backend needs to re-arm all fds from scratch */
504static void 801static void noinline
505fd_rearm_all (EV_P) 802fd_rearm_all (EV_P)
506{ 803{
507 int fd; 804 int fd;
508 805
509 /* this should be highly optimised to not do anything but set a flag */
510 for (fd = 0; fd < anfdmax; ++fd) 806 for (fd = 0; fd < anfdmax; ++fd)
511 if (anfds [fd].events) 807 if (anfds [fd].events)
512 { 808 {
513 anfds [fd].events = 0; 809 anfds [fd].events = 0;
514 fd_change (EV_A_ fd); 810 fd_change (EV_A_ fd, EV_IOFDSET | 1);
515 } 811 }
516} 812}
517 813
518/*****************************************************************************/ 814/*****************************************************************************/
519 815
520static void 816/*
521upheap (WT *heap, int k) 817 * the heap functions want a real array index. array index 0 uis guaranteed to not
522{ 818 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
523 WT w = heap [k]; 819 * the branching factor of the d-tree.
820 */
524 821
525 while (k && heap [k >> 1]->at > w->at) 822/*
526 { 823 * at the moment we allow libev the luxury of two heaps,
527 heap [k] = heap [k >> 1]; 824 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
528 ((W)heap [k])->active = k + 1; 825 * which is more cache-efficient.
529 k >>= 1; 826 * the difference is about 5% with 50000+ watchers.
530 } 827 */
828#if EV_USE_4HEAP
531 829
532 heap [k] = w; 830#define DHEAP 4
533 ((W)heap [k])->active = k + 1; 831#define HEAP0 (DHEAP - 1) /* index of first element in heap */
832#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
833#define UPHEAP_DONE(p,k) ((p) == (k))
534 834
535} 835/* away from the root */
536 836void inline_speed
537static void
538downheap (WT *heap, int N, int k) 837downheap (ANHE *heap, int N, int k)
539{ 838{
540 WT w = heap [k]; 839 ANHE he = heap [k];
840 ANHE *E = heap + N + HEAP0;
541 841
542 while (k < (N >> 1)) 842 for (;;)
543 { 843 {
544 int j = k << 1; 844 ev_tstamp minat;
845 ANHE *minpos;
846 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
545 847
546 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 848 /* find minimum child */
849 if (expect_true (pos + DHEAP - 1 < E))
547 ++j; 850 {
548 851 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
549 if (w->at <= heap [j]->at) 852 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
853 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
854 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
855 }
856 else if (pos < E)
857 {
858 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
859 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
860 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
861 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
862 }
863 else
550 break; 864 break;
551 865
866 if (ANHE_at (he) <= minat)
867 break;
868
869 heap [k] = *minpos;
870 ev_active (ANHE_w (*minpos)) = k;
871
872 k = minpos - heap;
873 }
874
875 heap [k] = he;
876 ev_active (ANHE_w (he)) = k;
877}
878
879#else /* 4HEAP */
880
881#define HEAP0 1
882#define HPARENT(k) ((k) >> 1)
883#define UPHEAP_DONE(p,k) (!(p))
884
885/* away from the root */
886void inline_speed
887downheap (ANHE *heap, int N, int k)
888{
889 ANHE he = heap [k];
890
891 for (;;)
892 {
893 int c = k << 1;
894
895 if (c > N + HEAP0 - 1)
896 break;
897
898 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
899 ? 1 : 0;
900
901 if (ANHE_at (he) <= ANHE_at (heap [c]))
902 break;
903
552 heap [k] = heap [j]; 904 heap [k] = heap [c];
553 ((W)heap [k])->active = k + 1; 905 ev_active (ANHE_w (heap [k])) = k;
906
554 k = j; 907 k = c;
555 } 908 }
556 909
557 heap [k] = w; 910 heap [k] = he;
558 ((W)heap [k])->active = k + 1; 911 ev_active (ANHE_w (he)) = k;
559} 912}
913#endif
560 914
561inline void 915/* towards the root */
916void inline_speed
917upheap (ANHE *heap, int k)
918{
919 ANHE he = heap [k];
920
921 for (;;)
922 {
923 int p = HPARENT (k);
924
925 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
926 break;
927
928 heap [k] = heap [p];
929 ev_active (ANHE_w (heap [k])) = k;
930 k = p;
931 }
932
933 heap [k] = he;
934 ev_active (ANHE_w (he)) = k;
935}
936
937void inline_size
562adjustheap (WT *heap, int N, int k) 938adjustheap (ANHE *heap, int N, int k)
563{ 939{
940 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
564 upheap (heap, k); 941 upheap (heap, k);
942 else
565 downheap (heap, N, k); 943 downheap (heap, N, k);
944}
945
946/* rebuild the heap: this function is used only once and executed rarely */
947void inline_size
948reheap (ANHE *heap, int N)
949{
950 int i;
951
952 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
953 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
954 for (i = 0; i < N; ++i)
955 upheap (heap, i + HEAP0);
566} 956}
567 957
568/*****************************************************************************/ 958/*****************************************************************************/
569 959
570typedef struct 960typedef struct
571{ 961{
572 WL head; 962 WL head;
573 sig_atomic_t volatile gotsig; 963 EV_ATOMIC_T gotsig;
574} ANSIG; 964} ANSIG;
575 965
576static ANSIG *signals; 966static ANSIG *signals;
577static int signalmax; 967static int signalmax;
578 968
579static int sigpipe [2]; 969static EV_ATOMIC_T gotsig;
580static sig_atomic_t volatile gotsig;
581static struct ev_io sigev;
582 970
583static void 971void inline_size
584signals_init (ANSIG *base, int count) 972signals_init (ANSIG *base, int count)
585{ 973{
586 while (count--) 974 while (count--)
587 { 975 {
588 base->head = 0; 976 base->head = 0;
… …
590 978
591 ++base; 979 ++base;
592 } 980 }
593} 981}
594 982
595static void 983/*****************************************************************************/
596sighandler (int signum)
597{
598#if _WIN32
599 signal (signum, sighandler);
600#endif
601 984
602 signals [signum - 1].gotsig = 1; 985void inline_speed
603
604 if (!gotsig)
605 {
606 int old_errno = errno;
607 gotsig = 1;
608 write (sigpipe [1], &signum, 1);
609 errno = old_errno;
610 }
611}
612
613void
614ev_feed_signal_event (EV_P_ int signum)
615{
616 WL w;
617
618#if EV_MULTIPLICITY
619 assert (("feeding signal events is only supported in the default loop", loop == default_loop));
620#endif
621
622 --signum;
623
624 if (signum < 0 || signum >= signalmax)
625 return;
626
627 signals [signum].gotsig = 0;
628
629 for (w = signals [signum].head; w; w = w->next)
630 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
631}
632
633static void
634sigcb (EV_P_ struct ev_io *iow, int revents)
635{
636 int signum;
637
638 read (sigpipe [0], &revents, 1);
639 gotsig = 0;
640
641 for (signum = signalmax; signum--; )
642 if (signals [signum].gotsig)
643 ev_feed_signal_event (EV_A_ signum + 1);
644}
645
646inline void
647fd_intern (int fd) 986fd_intern (int fd)
648{ 987{
649#ifdef _WIN32 988#ifdef _WIN32
650 int arg = 1; 989 unsigned long arg = 1;
651 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 990 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
652#else 991#else
653 fcntl (fd, F_SETFD, FD_CLOEXEC); 992 fcntl (fd, F_SETFD, FD_CLOEXEC);
654 fcntl (fd, F_SETFL, O_NONBLOCK); 993 fcntl (fd, F_SETFL, O_NONBLOCK);
655#endif 994#endif
656} 995}
657 996
997static void noinline
998evpipe_init (EV_P)
999{
1000 if (!ev_is_active (&pipeev))
1001 {
1002#if EV_USE_EVENTFD
1003 if ((evfd = eventfd (0, 0)) >= 0)
1004 {
1005 evpipe [0] = -1;
1006 fd_intern (evfd);
1007 ev_io_set (&pipeev, evfd, EV_READ);
1008 }
1009 else
1010#endif
1011 {
1012 while (pipe (evpipe))
1013 syserr ("(libev) error creating signal/async pipe");
1014
1015 fd_intern (evpipe [0]);
1016 fd_intern (evpipe [1]);
1017 ev_io_set (&pipeev, evpipe [0], EV_READ);
1018 }
1019
1020 ev_io_start (EV_A_ &pipeev);
1021 ev_unref (EV_A); /* watcher should not keep loop alive */
1022 }
1023}
1024
1025void inline_size
1026evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1027{
1028 if (!*flag)
1029 {
1030 int old_errno = errno; /* save errno because write might clobber it */
1031
1032 *flag = 1;
1033
1034#if EV_USE_EVENTFD
1035 if (evfd >= 0)
1036 {
1037 uint64_t counter = 1;
1038 write (evfd, &counter, sizeof (uint64_t));
1039 }
1040 else
1041#endif
1042 write (evpipe [1], &old_errno, 1);
1043
1044 errno = old_errno;
1045 }
1046}
1047
658static void 1048static void
659siginit (EV_P) 1049pipecb (EV_P_ ev_io *iow, int revents)
660{ 1050{
661 fd_intern (sigpipe [0]); 1051#if EV_USE_EVENTFD
662 fd_intern (sigpipe [1]); 1052 if (evfd >= 0)
1053 {
1054 uint64_t counter;
1055 read (evfd, &counter, sizeof (uint64_t));
1056 }
1057 else
1058#endif
1059 {
1060 char dummy;
1061 read (evpipe [0], &dummy, 1);
1062 }
663 1063
664 ev_io_set (&sigev, sigpipe [0], EV_READ); 1064 if (gotsig && ev_is_default_loop (EV_A))
665 ev_io_start (EV_A_ &sigev); 1065 {
666 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1066 int signum;
1067 gotsig = 0;
1068
1069 for (signum = signalmax; signum--; )
1070 if (signals [signum].gotsig)
1071 ev_feed_signal_event (EV_A_ signum + 1);
1072 }
1073
1074#if EV_ASYNC_ENABLE
1075 if (gotasync)
1076 {
1077 int i;
1078 gotasync = 0;
1079
1080 for (i = asynccnt; i--; )
1081 if (asyncs [i]->sent)
1082 {
1083 asyncs [i]->sent = 0;
1084 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1085 }
1086 }
1087#endif
667} 1088}
668 1089
669/*****************************************************************************/ 1090/*****************************************************************************/
670 1091
671static struct ev_child *childs [PID_HASHSIZE]; 1092static void
1093ev_sighandler (int signum)
1094{
1095#if EV_MULTIPLICITY
1096 struct ev_loop *loop = &default_loop_struct;
1097#endif
1098
1099#if _WIN32
1100 signal (signum, ev_sighandler);
1101#endif
1102
1103 signals [signum - 1].gotsig = 1;
1104 evpipe_write (EV_A_ &gotsig);
1105}
1106
1107void noinline
1108ev_feed_signal_event (EV_P_ int signum)
1109{
1110 WL w;
1111
1112#if EV_MULTIPLICITY
1113 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1114#endif
1115
1116 --signum;
1117
1118 if (signum < 0 || signum >= signalmax)
1119 return;
1120
1121 signals [signum].gotsig = 0;
1122
1123 for (w = signals [signum].head; w; w = w->next)
1124 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1125}
1126
1127/*****************************************************************************/
1128
1129static WL childs [EV_PID_HASHSIZE];
672 1130
673#ifndef _WIN32 1131#ifndef _WIN32
674 1132
675static struct ev_signal childev; 1133static ev_signal childev;
1134
1135#ifndef WIFCONTINUED
1136# define WIFCONTINUED(status) 0
1137#endif
1138
1139void inline_speed
1140child_reap (EV_P_ int chain, int pid, int status)
1141{
1142 ev_child *w;
1143 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1144
1145 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1146 {
1147 if ((w->pid == pid || !w->pid)
1148 && (!traced || (w->flags & 1)))
1149 {
1150 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1151 w->rpid = pid;
1152 w->rstatus = status;
1153 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1154 }
1155 }
1156}
676 1157
677#ifndef WCONTINUED 1158#ifndef WCONTINUED
678# define WCONTINUED 0 1159# define WCONTINUED 0
679#endif 1160#endif
680 1161
681static void 1162static void
682child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
683{
684 struct ev_child *w;
685
686 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
687 if (w->pid == pid || !w->pid)
688 {
689 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
690 w->rpid = pid;
691 w->rstatus = status;
692 ev_feed_event (EV_A_ (W)w, EV_CHILD);
693 }
694}
695
696static void
697childcb (EV_P_ struct ev_signal *sw, int revents) 1163childcb (EV_P_ ev_signal *sw, int revents)
698{ 1164{
699 int pid, status; 1165 int pid, status;
700 1166
1167 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
701 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1168 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
702 { 1169 if (!WCONTINUED
1170 || errno != EINVAL
1171 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1172 return;
1173
703 /* make sure we are called again until all childs have been reaped */ 1174 /* make sure we are called again until all children have been reaped */
1175 /* we need to do it this way so that the callback gets called before we continue */
704 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1176 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
705 1177
706 child_reap (EV_A_ sw, pid, pid, status); 1178 child_reap (EV_A_ pid, pid, status);
1179 if (EV_PID_HASHSIZE > 1)
707 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1180 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
708 }
709} 1181}
710 1182
711#endif 1183#endif
712 1184
713/*****************************************************************************/ 1185/*****************************************************************************/
714 1186
1187#if EV_USE_PORT
1188# include "ev_port.c"
1189#endif
715#if EV_USE_KQUEUE 1190#if EV_USE_KQUEUE
716# include "ev_kqueue.c" 1191# include "ev_kqueue.c"
717#endif 1192#endif
718#if EV_USE_EPOLL 1193#if EV_USE_EPOLL
719# include "ev_epoll.c" 1194# include "ev_epoll.c"
… …
736{ 1211{
737 return EV_VERSION_MINOR; 1212 return EV_VERSION_MINOR;
738} 1213}
739 1214
740/* return true if we are running with elevated privileges and should ignore env variables */ 1215/* return true if we are running with elevated privileges and should ignore env variables */
741static int 1216int inline_size
742enable_secure (void) 1217enable_secure (void)
743{ 1218{
744#ifdef _WIN32 1219#ifdef _WIN32
745 return 0; 1220 return 0;
746#else 1221#else
… …
748 || getgid () != getegid (); 1223 || getgid () != getegid ();
749#endif 1224#endif
750} 1225}
751 1226
752unsigned int 1227unsigned int
753ev_method (EV_P) 1228ev_supported_backends (void)
754{ 1229{
755 return method; 1230 unsigned int flags = 0;
756}
757 1231
758static void 1232 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1233 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1234 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1235 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1236 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1237
1238 return flags;
1239}
1240
1241unsigned int
1242ev_recommended_backends (void)
1243{
1244 unsigned int flags = ev_supported_backends ();
1245
1246#ifndef __NetBSD__
1247 /* kqueue is borked on everything but netbsd apparently */
1248 /* it usually doesn't work correctly on anything but sockets and pipes */
1249 flags &= ~EVBACKEND_KQUEUE;
1250#endif
1251#ifdef __APPLE__
1252 // flags &= ~EVBACKEND_KQUEUE; for documentation
1253 flags &= ~EVBACKEND_POLL;
1254#endif
1255
1256 return flags;
1257}
1258
1259unsigned int
1260ev_embeddable_backends (void)
1261{
1262 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1263
1264 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1265 /* please fix it and tell me how to detect the fix */
1266 flags &= ~EVBACKEND_EPOLL;
1267
1268 return flags;
1269}
1270
1271unsigned int
1272ev_backend (EV_P)
1273{
1274 return backend;
1275}
1276
1277unsigned int
1278ev_loop_count (EV_P)
1279{
1280 return loop_count;
1281}
1282
1283void
1284ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1285{
1286 io_blocktime = interval;
1287}
1288
1289void
1290ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1291{
1292 timeout_blocktime = interval;
1293}
1294
1295static void noinline
759loop_init (EV_P_ unsigned int flags) 1296loop_init (EV_P_ unsigned int flags)
760{ 1297{
761 if (!method) 1298 if (!backend)
762 { 1299 {
763#if EV_USE_MONOTONIC 1300#if EV_USE_MONOTONIC
764 { 1301 {
765 struct timespec ts; 1302 struct timespec ts;
766 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1303 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
767 have_monotonic = 1; 1304 have_monotonic = 1;
768 } 1305 }
769#endif 1306#endif
770 1307
771 ev_rt_now = ev_time (); 1308 ev_rt_now = ev_time ();
772 mn_now = get_clock (); 1309 mn_now = get_clock ();
773 now_floor = mn_now; 1310 now_floor = mn_now;
774 rtmn_diff = ev_rt_now - mn_now; 1311 rtmn_diff = ev_rt_now - mn_now;
775 1312
776 if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS")) 1313 io_blocktime = 0.;
1314 timeout_blocktime = 0.;
1315 backend = 0;
1316 backend_fd = -1;
1317 gotasync = 0;
1318#if EV_USE_INOTIFY
1319 fs_fd = -2;
1320#endif
1321
1322 /* pid check not overridable via env */
1323#ifndef _WIN32
1324 if (flags & EVFLAG_FORKCHECK)
1325 curpid = getpid ();
1326#endif
1327
1328 if (!(flags & EVFLAG_NOENV)
1329 && !enable_secure ()
1330 && getenv ("LIBEV_FLAGS"))
777 flags = atoi (getenv ("LIBEV_FLAGS")); 1331 flags = atoi (getenv ("LIBEV_FLAGS"));
778 1332
779 if (!(flags & 0x0000ffff)) 1333 if (!(flags & 0x0000ffffU))
780 flags |= 0x0000ffff; 1334 flags |= ev_recommended_backends ();
781 1335
782 method = 0; 1336#if EV_USE_PORT
1337 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1338#endif
783#if EV_USE_KQUEUE 1339#if EV_USE_KQUEUE
784 if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags); 1340 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
785#endif 1341#endif
786#if EV_USE_EPOLL 1342#if EV_USE_EPOLL
787 if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags); 1343 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
788#endif 1344#endif
789#if EV_USE_POLL 1345#if EV_USE_POLL
790 if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags); 1346 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
791#endif 1347#endif
792#if EV_USE_SELECT 1348#if EV_USE_SELECT
793 if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags); 1349 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
794#endif 1350#endif
795 1351
796 ev_init (&sigev, sigcb); 1352 ev_init (&pipeev, pipecb);
797 ev_set_priority (&sigev, EV_MAXPRI); 1353 ev_set_priority (&pipeev, EV_MAXPRI);
798 } 1354 }
799} 1355}
800 1356
801void 1357static void noinline
802loop_destroy (EV_P) 1358loop_destroy (EV_P)
803{ 1359{
804 int i; 1360 int i;
805 1361
1362 if (ev_is_active (&pipeev))
1363 {
1364 ev_ref (EV_A); /* signal watcher */
1365 ev_io_stop (EV_A_ &pipeev);
1366
1367#if EV_USE_EVENTFD
1368 if (evfd >= 0)
1369 close (evfd);
1370#endif
1371
1372 if (evpipe [0] >= 0)
1373 {
1374 close (evpipe [0]);
1375 close (evpipe [1]);
1376 }
1377 }
1378
1379#if EV_USE_INOTIFY
1380 if (fs_fd >= 0)
1381 close (fs_fd);
1382#endif
1383
1384 if (backend_fd >= 0)
1385 close (backend_fd);
1386
1387#if EV_USE_PORT
1388 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1389#endif
806#if EV_USE_KQUEUE 1390#if EV_USE_KQUEUE
807 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1391 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
808#endif 1392#endif
809#if EV_USE_EPOLL 1393#if EV_USE_EPOLL
810 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1394 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
811#endif 1395#endif
812#if EV_USE_POLL 1396#if EV_USE_POLL
813 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1397 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
814#endif 1398#endif
815#if EV_USE_SELECT 1399#if EV_USE_SELECT
816 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1400 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
817#endif 1401#endif
818 1402
819 for (i = NUMPRI; i--; ) 1403 for (i = NUMPRI; i--; )
1404 {
820 array_free (pending, [i]); 1405 array_free (pending, [i]);
1406#if EV_IDLE_ENABLE
1407 array_free (idle, [i]);
1408#endif
1409 }
1410
1411 ev_free (anfds); anfdmax = 0;
821 1412
822 /* have to use the microsoft-never-gets-it-right macro */ 1413 /* have to use the microsoft-never-gets-it-right macro */
823 array_free (fdchange, EMPTY0); 1414 array_free (fdchange, EMPTY);
824 array_free (timer, EMPTY0); 1415 array_free (timer, EMPTY);
825#if EV_PERIODICS 1416#if EV_PERIODIC_ENABLE
826 array_free (periodic, EMPTY0); 1417 array_free (periodic, EMPTY);
827#endif 1418#endif
1419#if EV_FORK_ENABLE
828 array_free (idle, EMPTY0); 1420 array_free (fork, EMPTY);
1421#endif
829 array_free (prepare, EMPTY0); 1422 array_free (prepare, EMPTY);
830 array_free (check, EMPTY0); 1423 array_free (check, EMPTY);
1424#if EV_ASYNC_ENABLE
1425 array_free (async, EMPTY);
1426#endif
831 1427
832 method = 0; 1428 backend = 0;
833} 1429}
834 1430
835static void 1431#if EV_USE_INOTIFY
1432void inline_size infy_fork (EV_P);
1433#endif
1434
1435void inline_size
836loop_fork (EV_P) 1436loop_fork (EV_P)
837{ 1437{
1438#if EV_USE_PORT
1439 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1440#endif
1441#if EV_USE_KQUEUE
1442 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1443#endif
838#if EV_USE_EPOLL 1444#if EV_USE_EPOLL
839 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1445 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
840#endif 1446#endif
841#if EV_USE_KQUEUE 1447#if EV_USE_INOTIFY
842 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 1448 infy_fork (EV_A);
843#endif 1449#endif
844 1450
845 if (ev_is_active (&sigev)) 1451 if (ev_is_active (&pipeev))
846 { 1452 {
847 /* default loop */ 1453 /* this "locks" the handlers against writing to the pipe */
1454 /* while we modify the fd vars */
1455 gotsig = 1;
1456#if EV_ASYNC_ENABLE
1457 gotasync = 1;
1458#endif
848 1459
849 ev_ref (EV_A); 1460 ev_ref (EV_A);
850 ev_io_stop (EV_A_ &sigev); 1461 ev_io_stop (EV_A_ &pipeev);
1462
1463#if EV_USE_EVENTFD
1464 if (evfd >= 0)
1465 close (evfd);
1466#endif
1467
1468 if (evpipe [0] >= 0)
1469 {
851 close (sigpipe [0]); 1470 close (evpipe [0]);
852 close (sigpipe [1]); 1471 close (evpipe [1]);
1472 }
853 1473
854 while (pipe (sigpipe))
855 syserr ("(libev) error creating pipe");
856
857 siginit (EV_A); 1474 evpipe_init (EV_A);
1475 /* now iterate over everything, in case we missed something */
1476 pipecb (EV_A_ &pipeev, EV_READ);
858 } 1477 }
859 1478
860 postfork = 0; 1479 postfork = 0;
861} 1480}
1481
1482#if EV_MULTIPLICITY
1483
1484struct ev_loop *
1485ev_loop_new (unsigned int flags)
1486{
1487 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1488
1489 memset (loop, 0, sizeof (struct ev_loop));
1490
1491 loop_init (EV_A_ flags);
1492
1493 if (ev_backend (EV_A))
1494 return loop;
1495
1496 return 0;
1497}
1498
1499void
1500ev_loop_destroy (EV_P)
1501{
1502 loop_destroy (EV_A);
1503 ev_free (loop);
1504}
1505
1506void
1507ev_loop_fork (EV_P)
1508{
1509 postfork = 1; /* must be in line with ev_default_fork */
1510}
1511
1512#if EV_VERIFY
1513void noinline
1514verify_watcher (EV_P_ W w)
1515{
1516 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1517
1518 if (w->pending)
1519 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1520}
1521
1522static void noinline
1523verify_heap (EV_P_ ANHE *heap, int N)
1524{
1525 int i;
1526
1527 for (i = HEAP0; i < N + HEAP0; ++i)
1528 {
1529 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1530 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1531 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1532
1533 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1534 }
1535}
1536
1537static void noinline
1538array_verify (EV_P_ W *ws, int cnt)
1539{
1540 while (cnt--)
1541 {
1542 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1543 verify_watcher (EV_A_ ws [cnt]);
1544 }
1545}
1546#endif
1547
1548void
1549ev_loop_verify (EV_P)
1550{
1551#if EV_VERIFY
1552 int i;
1553 WL w;
1554
1555 assert (activecnt >= -1);
1556
1557 assert (fdchangemax >= fdchangecnt);
1558 for (i = 0; i < fdchangecnt; ++i)
1559 assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1560
1561 assert (anfdmax >= 0);
1562 for (i = 0; i < anfdmax; ++i)
1563 for (w = anfds [i].head; w; w = w->next)
1564 {
1565 verify_watcher (EV_A_ (W)w);
1566 assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
1567 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1568 }
1569
1570 assert (timermax >= timercnt);
1571 verify_heap (EV_A_ timers, timercnt);
1572
1573#if EV_PERIODIC_ENABLE
1574 assert (periodicmax >= periodiccnt);
1575 verify_heap (EV_A_ periodics, periodiccnt);
1576#endif
1577
1578 for (i = NUMPRI; i--; )
1579 {
1580 assert (pendingmax [i] >= pendingcnt [i]);
1581#if EV_IDLE_ENABLE
1582 assert (idleall >= 0);
1583 assert (idlemax [i] >= idlecnt [i]);
1584 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1585#endif
1586 }
1587
1588#if EV_FORK_ENABLE
1589 assert (forkmax >= forkcnt);
1590 array_verify (EV_A_ (W *)forks, forkcnt);
1591#endif
1592
1593#if EV_ASYNC_ENABLE
1594 assert (asyncmax >= asynccnt);
1595 array_verify (EV_A_ (W *)asyncs, asynccnt);
1596#endif
1597
1598 assert (preparemax >= preparecnt);
1599 array_verify (EV_A_ (W *)prepares, preparecnt);
1600
1601 assert (checkmax >= checkcnt);
1602 array_verify (EV_A_ (W *)checks, checkcnt);
1603
1604# if 0
1605 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1606 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1607# endif
1608#endif
1609}
1610
1611#endif /* multiplicity */
862 1612
863#if EV_MULTIPLICITY 1613#if EV_MULTIPLICITY
864struct ev_loop * 1614struct ev_loop *
865ev_loop_new (unsigned int flags) 1615ev_default_loop_init (unsigned int flags)
866{
867 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
868
869 memset (loop, 0, sizeof (struct ev_loop));
870
871 loop_init (EV_A_ flags);
872
873 if (ev_method (EV_A))
874 return loop;
875
876 return 0;
877}
878
879void
880ev_loop_destroy (EV_P)
881{
882 loop_destroy (EV_A);
883 ev_free (loop);
884}
885
886void
887ev_loop_fork (EV_P)
888{
889 postfork = 1;
890}
891
892#endif
893
894#if EV_MULTIPLICITY
895struct ev_loop *
896#else 1616#else
897int 1617int
898#endif
899ev_default_loop (unsigned int flags) 1618ev_default_loop (unsigned int flags)
1619#endif
900{ 1620{
901 if (sigpipe [0] == sigpipe [1])
902 if (pipe (sigpipe))
903 return 0;
904
905 if (!default_loop) 1621 if (!ev_default_loop_ptr)
906 { 1622 {
907#if EV_MULTIPLICITY 1623#if EV_MULTIPLICITY
908 struct ev_loop *loop = default_loop = &default_loop_struct; 1624 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
909#else 1625#else
910 default_loop = 1; 1626 ev_default_loop_ptr = 1;
911#endif 1627#endif
912 1628
913 loop_init (EV_A_ flags); 1629 loop_init (EV_A_ flags);
914 1630
915 if (ev_method (EV_A)) 1631 if (ev_backend (EV_A))
916 { 1632 {
917 siginit (EV_A);
918
919#ifndef _WIN32 1633#ifndef _WIN32
920 ev_signal_init (&childev, childcb, SIGCHLD); 1634 ev_signal_init (&childev, childcb, SIGCHLD);
921 ev_set_priority (&childev, EV_MAXPRI); 1635 ev_set_priority (&childev, EV_MAXPRI);
922 ev_signal_start (EV_A_ &childev); 1636 ev_signal_start (EV_A_ &childev);
923 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1637 ev_unref (EV_A); /* child watcher should not keep loop alive */
924#endif 1638#endif
925 } 1639 }
926 else 1640 else
927 default_loop = 0; 1641 ev_default_loop_ptr = 0;
928 } 1642 }
929 1643
930 return default_loop; 1644 return ev_default_loop_ptr;
931} 1645}
932 1646
933void 1647void
934ev_default_destroy (void) 1648ev_default_destroy (void)
935{ 1649{
936#if EV_MULTIPLICITY 1650#if EV_MULTIPLICITY
937 struct ev_loop *loop = default_loop; 1651 struct ev_loop *loop = ev_default_loop_ptr;
938#endif 1652#endif
939 1653
940#ifndef _WIN32 1654#ifndef _WIN32
941 ev_ref (EV_A); /* child watcher */ 1655 ev_ref (EV_A); /* child watcher */
942 ev_signal_stop (EV_A_ &childev); 1656 ev_signal_stop (EV_A_ &childev);
943#endif 1657#endif
944 1658
945 ev_ref (EV_A); /* signal watcher */
946 ev_io_stop (EV_A_ &sigev);
947
948 close (sigpipe [0]); sigpipe [0] = 0;
949 close (sigpipe [1]); sigpipe [1] = 0;
950
951 loop_destroy (EV_A); 1659 loop_destroy (EV_A);
952} 1660}
953 1661
954void 1662void
955ev_default_fork (void) 1663ev_default_fork (void)
956{ 1664{
957#if EV_MULTIPLICITY 1665#if EV_MULTIPLICITY
958 struct ev_loop *loop = default_loop; 1666 struct ev_loop *loop = ev_default_loop_ptr;
959#endif 1667#endif
960 1668
961 if (method) 1669 if (backend)
962 postfork = 1; 1670 postfork = 1; /* must be in line with ev_loop_fork */
963} 1671}
964 1672
965/*****************************************************************************/ 1673/*****************************************************************************/
966 1674
967static int 1675void
968any_pending (EV_P) 1676ev_invoke (EV_P_ void *w, int revents)
969{ 1677{
970 int pri; 1678 EV_CB_INVOKE ((W)w, revents);
971
972 for (pri = NUMPRI; pri--; )
973 if (pendingcnt [pri])
974 return 1;
975
976 return 0;
977} 1679}
978 1680
979static void 1681void inline_speed
980call_pending (EV_P) 1682call_pending (EV_P)
981{ 1683{
982 int pri; 1684 int pri;
983 1685
984 for (pri = NUMPRI; pri--; ) 1686 for (pri = NUMPRI; pri--; )
985 while (pendingcnt [pri]) 1687 while (pendingcnt [pri])
986 { 1688 {
987 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1689 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
988 1690
989 if (p->w) 1691 if (expect_true (p->w))
990 { 1692 {
1693 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1694
991 p->w->pending = 0; 1695 p->w->pending = 0;
992 EV_CB_INVOKE (p->w, p->events); 1696 EV_CB_INVOKE (p->w, p->events);
1697 EV_FREQUENT_CHECK;
993 } 1698 }
994 } 1699 }
995} 1700}
996 1701
997static void 1702#if EV_IDLE_ENABLE
1703void inline_size
1704idle_reify (EV_P)
1705{
1706 if (expect_false (idleall))
1707 {
1708 int pri;
1709
1710 for (pri = NUMPRI; pri--; )
1711 {
1712 if (pendingcnt [pri])
1713 break;
1714
1715 if (idlecnt [pri])
1716 {
1717 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1718 break;
1719 }
1720 }
1721 }
1722}
1723#endif
1724
1725void inline_size
998timers_reify (EV_P) 1726timers_reify (EV_P)
999{ 1727{
1728 EV_FREQUENT_CHECK;
1729
1000 while (timercnt && ((WT)timers [0])->at <= mn_now) 1730 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1001 { 1731 {
1002 struct ev_timer *w = timers [0]; 1732 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1003 1733
1004 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1734 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1005 1735
1006 /* first reschedule or stop timer */ 1736 /* first reschedule or stop timer */
1007 if (w->repeat) 1737 if (w->repeat)
1008 { 1738 {
1739 ev_at (w) += w->repeat;
1740 if (ev_at (w) < mn_now)
1741 ev_at (w) = mn_now;
1742
1009 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1743 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1010 1744
1011 ((WT)w)->at += w->repeat; 1745 ANHE_at_cache (timers [HEAP0]);
1012 if (((WT)w)->at < mn_now)
1013 ((WT)w)->at = mn_now;
1014
1015 downheap ((WT *)timers, timercnt, 0); 1746 downheap (timers, timercnt, HEAP0);
1016 } 1747 }
1017 else 1748 else
1018 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1749 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1019 1750
1751 EV_FREQUENT_CHECK;
1020 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 1752 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1021 } 1753 }
1022} 1754}
1023 1755
1024#if EV_PERIODICS 1756#if EV_PERIODIC_ENABLE
1025static void 1757void inline_size
1026periodics_reify (EV_P) 1758periodics_reify (EV_P)
1027{ 1759{
1760 EV_FREQUENT_CHECK;
1761
1028 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 1762 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1029 { 1763 {
1030 struct ev_periodic *w = periodics [0]; 1764 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1031 1765
1032 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1766 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1033 1767
1034 /* first reschedule or stop timer */ 1768 /* first reschedule or stop timer */
1035 if (w->reschedule_cb) 1769 if (w->reschedule_cb)
1036 { 1770 {
1037 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 1771 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1772
1038 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 1773 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1774
1775 ANHE_at_cache (periodics [HEAP0]);
1039 downheap ((WT *)periodics, periodiccnt, 0); 1776 downheap (periodics, periodiccnt, HEAP0);
1040 } 1777 }
1041 else if (w->interval) 1778 else if (w->interval)
1042 { 1779 {
1043 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; 1780 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1044 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now)); 1781 /* if next trigger time is not sufficiently in the future, put it there */
1782 /* this might happen because of floating point inexactness */
1783 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1784 {
1785 ev_at (w) += w->interval;
1786
1787 /* if interval is unreasonably low we might still have a time in the past */
1788 /* so correct this. this will make the periodic very inexact, but the user */
1789 /* has effectively asked to get triggered more often than possible */
1790 if (ev_at (w) < ev_rt_now)
1791 ev_at (w) = ev_rt_now;
1792 }
1793
1794 ANHE_at_cache (periodics [HEAP0]);
1045 downheap ((WT *)periodics, periodiccnt, 0); 1795 downheap (periodics, periodiccnt, HEAP0);
1046 } 1796 }
1047 else 1797 else
1048 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1798 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1049 1799
1800 EV_FREQUENT_CHECK;
1050 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 1801 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1051 } 1802 }
1052} 1803}
1053 1804
1054static void 1805static void noinline
1055periodics_reschedule (EV_P) 1806periodics_reschedule (EV_P)
1056{ 1807{
1057 int i; 1808 int i;
1058 1809
1059 /* adjust periodics after time jump */ 1810 /* adjust periodics after time jump */
1060 for (i = 0; i < periodiccnt; ++i) 1811 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1061 { 1812 {
1062 struct ev_periodic *w = periodics [i]; 1813 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1063 1814
1064 if (w->reschedule_cb) 1815 if (w->reschedule_cb)
1065 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 1816 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1066 else if (w->interval) 1817 else if (w->interval)
1067 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 1818 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1819
1820 ANHE_at_cache (periodics [i]);
1821 }
1822
1823 reheap (periodics, periodiccnt);
1824}
1825#endif
1826
1827void inline_speed
1828time_update (EV_P_ ev_tstamp max_block)
1829{
1830 int i;
1831
1832#if EV_USE_MONOTONIC
1833 if (expect_true (have_monotonic))
1068 } 1834 {
1835 ev_tstamp odiff = rtmn_diff;
1069 1836
1070 /* now rebuild the heap */
1071 for (i = periodiccnt >> 1; i--; )
1072 downheap ((WT *)periodics, periodiccnt, i);
1073}
1074#endif
1075
1076inline int
1077time_update_monotonic (EV_P)
1078{
1079 mn_now = get_clock (); 1837 mn_now = get_clock ();
1080 1838
1839 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1840 /* interpolate in the meantime */
1081 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 1841 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1082 { 1842 {
1083 ev_rt_now = rtmn_diff + mn_now; 1843 ev_rt_now = rtmn_diff + mn_now;
1084 return 0; 1844 return;
1085 } 1845 }
1086 else 1846
1087 {
1088 now_floor = mn_now; 1847 now_floor = mn_now;
1089 ev_rt_now = ev_time (); 1848 ev_rt_now = ev_time ();
1090 return 1;
1091 }
1092}
1093 1849
1094static void 1850 /* loop a few times, before making important decisions.
1095time_update (EV_P) 1851 * on the choice of "4": one iteration isn't enough,
1096{ 1852 * in case we get preempted during the calls to
1097 int i; 1853 * ev_time and get_clock. a second call is almost guaranteed
1098 1854 * to succeed in that case, though. and looping a few more times
1099#if EV_USE_MONOTONIC 1855 * doesn't hurt either as we only do this on time-jumps or
1100 if (expect_true (have_monotonic)) 1856 * in the unlikely event of having been preempted here.
1101 { 1857 */
1102 if (time_update_monotonic (EV_A)) 1858 for (i = 4; --i; )
1103 { 1859 {
1104 ev_tstamp odiff = rtmn_diff; 1860 rtmn_diff = ev_rt_now - mn_now;
1105 1861
1106 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1862 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1863 return; /* all is well */
1864
1865 ev_rt_now = ev_time ();
1866 mn_now = get_clock ();
1867 now_floor = mn_now;
1868 }
1869
1870# if EV_PERIODIC_ENABLE
1871 periodics_reschedule (EV_A);
1872# endif
1873 /* no timer adjustment, as the monotonic clock doesn't jump */
1874 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1875 }
1876 else
1877#endif
1878 {
1879 ev_rt_now = ev_time ();
1880
1881 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1882 {
1883#if EV_PERIODIC_ENABLE
1884 periodics_reschedule (EV_A);
1885#endif
1886 /* adjust timers. this is easy, as the offset is the same for all of them */
1887 for (i = 0; i < timercnt; ++i)
1107 { 1888 {
1108 rtmn_diff = ev_rt_now - mn_now; 1889 ANHE *he = timers + i + HEAP0;
1109 1890 ANHE_w (*he)->at += ev_rt_now - mn_now;
1110 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1891 ANHE_at_cache (*he);
1111 return; /* all is well */
1112
1113 ev_rt_now = ev_time ();
1114 mn_now = get_clock ();
1115 now_floor = mn_now;
1116 } 1892 }
1117
1118# if EV_PERIODICS
1119 periodics_reschedule (EV_A);
1120# endif
1121 /* no timer adjustment, as the monotonic clock doesn't jump */
1122 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1123 } 1893 }
1124 }
1125 else
1126#endif
1127 {
1128 ev_rt_now = ev_time ();
1129
1130 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1131 {
1132#if EV_PERIODICS
1133 periodics_reschedule (EV_A);
1134#endif
1135
1136 /* adjust timers. this is easy, as the offset is the same for all */
1137 for (i = 0; i < timercnt; ++i)
1138 ((WT)timers [i])->at += ev_rt_now - mn_now;
1139 }
1140 1894
1141 mn_now = ev_rt_now; 1895 mn_now = ev_rt_now;
1142 } 1896 }
1143} 1897}
1144 1898
… …
1157static int loop_done; 1911static int loop_done;
1158 1912
1159void 1913void
1160ev_loop (EV_P_ int flags) 1914ev_loop (EV_P_ int flags)
1161{ 1915{
1162 double block; 1916 loop_done = EVUNLOOP_CANCEL;
1163 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
1164 1917
1165 while (activecnt) 1918 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1919
1920 do
1166 { 1921 {
1922#if EV_VERIFY >= 2
1923 ev_loop_verify (EV_A);
1924#endif
1925
1926#ifndef _WIN32
1927 if (expect_false (curpid)) /* penalise the forking check even more */
1928 if (expect_false (getpid () != curpid))
1929 {
1930 curpid = getpid ();
1931 postfork = 1;
1932 }
1933#endif
1934
1935#if EV_FORK_ENABLE
1936 /* we might have forked, so queue fork handlers */
1937 if (expect_false (postfork))
1938 if (forkcnt)
1939 {
1940 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1941 call_pending (EV_A);
1942 }
1943#endif
1944
1167 /* queue check watchers (and execute them) */ 1945 /* queue prepare watchers (and execute them) */
1168 if (expect_false (preparecnt)) 1946 if (expect_false (preparecnt))
1169 { 1947 {
1170 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1948 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1171 call_pending (EV_A); 1949 call_pending (EV_A);
1172 } 1950 }
1173 1951
1952 if (expect_false (!activecnt))
1953 break;
1954
1174 /* we might have forked, so reify kernel state if necessary */ 1955 /* we might have forked, so reify kernel state if necessary */
1175 if (expect_false (postfork)) 1956 if (expect_false (postfork))
1176 loop_fork (EV_A); 1957 loop_fork (EV_A);
1177 1958
1178 /* update fd-related kernel structures */ 1959 /* update fd-related kernel structures */
1179 fd_reify (EV_A); 1960 fd_reify (EV_A);
1180 1961
1181 /* calculate blocking time */ 1962 /* calculate blocking time */
1963 {
1964 ev_tstamp waittime = 0.;
1965 ev_tstamp sleeptime = 0.;
1182 1966
1183 /* we only need this for !monotonic clock or timers, but as we basically 1967 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1184 always have timers, we just calculate it always */
1185#if EV_USE_MONOTONIC
1186 if (expect_true (have_monotonic))
1187 time_update_monotonic (EV_A);
1188 else
1189#endif
1190 { 1968 {
1191 ev_rt_now = ev_time (); 1969 /* update time to cancel out callback processing overhead */
1192 mn_now = ev_rt_now; 1970 time_update (EV_A_ 1e100);
1193 }
1194 1971
1195 if (flags & EVLOOP_NONBLOCK || idlecnt)
1196 block = 0.;
1197 else
1198 {
1199 block = MAX_BLOCKTIME; 1972 waittime = MAX_BLOCKTIME;
1200 1973
1201 if (timercnt) 1974 if (timercnt)
1202 { 1975 {
1203 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 1976 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1204 if (block > to) block = to; 1977 if (waittime > to) waittime = to;
1205 } 1978 }
1206 1979
1207#if EV_PERIODICS 1980#if EV_PERIODIC_ENABLE
1208 if (periodiccnt) 1981 if (periodiccnt)
1209 { 1982 {
1210 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; 1983 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1211 if (block > to) block = to; 1984 if (waittime > to) waittime = to;
1212 } 1985 }
1213#endif 1986#endif
1214 1987
1215 if (block < 0.) block = 0.; 1988 if (expect_false (waittime < timeout_blocktime))
1989 waittime = timeout_blocktime;
1990
1991 sleeptime = waittime - backend_fudge;
1992
1993 if (expect_true (sleeptime > io_blocktime))
1994 sleeptime = io_blocktime;
1995
1996 if (sleeptime)
1997 {
1998 ev_sleep (sleeptime);
1999 waittime -= sleeptime;
2000 }
1216 } 2001 }
1217 2002
1218 method_poll (EV_A_ block); 2003 ++loop_count;
2004 backend_poll (EV_A_ waittime);
1219 2005
1220 /* update ev_rt_now, do magic */ 2006 /* update ev_rt_now, do magic */
1221 time_update (EV_A); 2007 time_update (EV_A_ waittime + sleeptime);
2008 }
1222 2009
1223 /* queue pending timers and reschedule them */ 2010 /* queue pending timers and reschedule them */
1224 timers_reify (EV_A); /* relative timers called last */ 2011 timers_reify (EV_A); /* relative timers called last */
1225#if EV_PERIODICS 2012#if EV_PERIODIC_ENABLE
1226 periodics_reify (EV_A); /* absolute timers called first */ 2013 periodics_reify (EV_A); /* absolute timers called first */
1227#endif 2014#endif
1228 2015
2016#if EV_IDLE_ENABLE
1229 /* queue idle watchers unless io or timers are pending */ 2017 /* queue idle watchers unless other events are pending */
1230 if (idlecnt && !any_pending (EV_A)) 2018 idle_reify (EV_A);
1231 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2019#endif
1232 2020
1233 /* queue check watchers, to be executed first */ 2021 /* queue check watchers, to be executed first */
1234 if (checkcnt) 2022 if (expect_false (checkcnt))
1235 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2023 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1236 2024
1237 call_pending (EV_A); 2025 call_pending (EV_A);
1238
1239 if (loop_done)
1240 break;
1241 } 2026 }
2027 while (expect_true (
2028 activecnt
2029 && !loop_done
2030 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2031 ));
1242 2032
1243 if (loop_done != 2) 2033 if (loop_done == EVUNLOOP_ONE)
1244 loop_done = 0; 2034 loop_done = EVUNLOOP_CANCEL;
1245} 2035}
1246 2036
1247void 2037void
1248ev_unloop (EV_P_ int how) 2038ev_unloop (EV_P_ int how)
1249{ 2039{
1250 loop_done = how; 2040 loop_done = how;
1251} 2041}
1252 2042
1253/*****************************************************************************/ 2043/*****************************************************************************/
1254 2044
1255inline void 2045void inline_size
1256wlist_add (WL *head, WL elem) 2046wlist_add (WL *head, WL elem)
1257{ 2047{
1258 elem->next = *head; 2048 elem->next = *head;
1259 *head = elem; 2049 *head = elem;
1260} 2050}
1261 2051
1262inline void 2052void inline_size
1263wlist_del (WL *head, WL elem) 2053wlist_del (WL *head, WL elem)
1264{ 2054{
1265 while (*head) 2055 while (*head)
1266 { 2056 {
1267 if (*head == elem) 2057 if (*head == elem)
… …
1272 2062
1273 head = &(*head)->next; 2063 head = &(*head)->next;
1274 } 2064 }
1275} 2065}
1276 2066
1277inline void 2067void inline_speed
1278ev_clear_pending (EV_P_ W w) 2068clear_pending (EV_P_ W w)
1279{ 2069{
1280 if (w->pending) 2070 if (w->pending)
1281 { 2071 {
1282 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2072 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1283 w->pending = 0; 2073 w->pending = 0;
1284 } 2074 }
1285} 2075}
1286 2076
1287inline void 2077int
2078ev_clear_pending (EV_P_ void *w)
2079{
2080 W w_ = (W)w;
2081 int pending = w_->pending;
2082
2083 if (expect_true (pending))
2084 {
2085 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2086 w_->pending = 0;
2087 p->w = 0;
2088 return p->events;
2089 }
2090 else
2091 return 0;
2092}
2093
2094void inline_size
2095pri_adjust (EV_P_ W w)
2096{
2097 int pri = w->priority;
2098 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2099 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2100 w->priority = pri;
2101}
2102
2103void inline_speed
1288ev_start (EV_P_ W w, int active) 2104ev_start (EV_P_ W w, int active)
1289{ 2105{
1290 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2106 pri_adjust (EV_A_ w);
1291 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1292
1293 w->active = active; 2107 w->active = active;
1294 ev_ref (EV_A); 2108 ev_ref (EV_A);
1295} 2109}
1296 2110
1297inline void 2111void inline_size
1298ev_stop (EV_P_ W w) 2112ev_stop (EV_P_ W w)
1299{ 2113{
1300 ev_unref (EV_A); 2114 ev_unref (EV_A);
1301 w->active = 0; 2115 w->active = 0;
1302} 2116}
1303 2117
1304/*****************************************************************************/ 2118/*****************************************************************************/
1305 2119
1306void 2120void noinline
1307ev_io_start (EV_P_ struct ev_io *w) 2121ev_io_start (EV_P_ ev_io *w)
1308{ 2122{
1309 int fd = w->fd; 2123 int fd = w->fd;
1310 2124
1311 if (ev_is_active (w)) 2125 if (expect_false (ev_is_active (w)))
1312 return; 2126 return;
1313 2127
1314 assert (("ev_io_start called with negative fd", fd >= 0)); 2128 assert (("ev_io_start called with negative fd", fd >= 0));
2129
2130 EV_FREQUENT_CHECK;
1315 2131
1316 ev_start (EV_A_ (W)w, 1); 2132 ev_start (EV_A_ (W)w, 1);
1317 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2133 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1318 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2134 wlist_add (&anfds[fd].head, (WL)w);
1319 2135
1320 fd_change (EV_A_ fd); 2136 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1321} 2137 w->events &= ~EV_IOFDSET;
1322 2138
1323void 2139 EV_FREQUENT_CHECK;
2140}
2141
2142void noinline
1324ev_io_stop (EV_P_ struct ev_io *w) 2143ev_io_stop (EV_P_ ev_io *w)
1325{ 2144{
1326 ev_clear_pending (EV_A_ (W)w); 2145 clear_pending (EV_A_ (W)w);
1327 if (!ev_is_active (w)) 2146 if (expect_false (!ev_is_active (w)))
1328 return; 2147 return;
1329 2148
1330 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2149 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1331 2150
2151 EV_FREQUENT_CHECK;
2152
1332 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2153 wlist_del (&anfds[w->fd].head, (WL)w);
1333 ev_stop (EV_A_ (W)w); 2154 ev_stop (EV_A_ (W)w);
1334 2155
1335 fd_change (EV_A_ w->fd); 2156 fd_change (EV_A_ w->fd, 1);
1336}
1337 2157
1338void 2158 EV_FREQUENT_CHECK;
2159}
2160
2161void noinline
1339ev_timer_start (EV_P_ struct ev_timer *w) 2162ev_timer_start (EV_P_ ev_timer *w)
1340{ 2163{
1341 if (ev_is_active (w)) 2164 if (expect_false (ev_is_active (w)))
1342 return; 2165 return;
1343 2166
1344 ((WT)w)->at += mn_now; 2167 ev_at (w) += mn_now;
1345 2168
1346 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2169 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1347 2170
2171 EV_FREQUENT_CHECK;
2172
2173 ++timercnt;
1348 ev_start (EV_A_ (W)w, ++timercnt); 2174 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1349 array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2); 2175 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1350 timers [timercnt - 1] = w; 2176 ANHE_w (timers [ev_active (w)]) = (WT)w;
1351 upheap ((WT *)timers, timercnt - 1); 2177 ANHE_at_cache (timers [ev_active (w)]);
2178 upheap (timers, ev_active (w));
1352 2179
2180 EV_FREQUENT_CHECK;
2181
1353 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2182 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1354} 2183}
1355 2184
1356void 2185void noinline
1357ev_timer_stop (EV_P_ struct ev_timer *w) 2186ev_timer_stop (EV_P_ ev_timer *w)
1358{ 2187{
1359 ev_clear_pending (EV_A_ (W)w); 2188 clear_pending (EV_A_ (W)w);
1360 if (!ev_is_active (w)) 2189 if (expect_false (!ev_is_active (w)))
1361 return; 2190 return;
1362 2191
2192 EV_FREQUENT_CHECK;
2193
2194 {
2195 int active = ev_active (w);
2196
1363 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2197 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1364 2198
1365 if (((W)w)->active < timercnt--) 2199 --timercnt;
2200
2201 if (expect_true (active < timercnt + HEAP0))
1366 { 2202 {
1367 timers [((W)w)->active - 1] = timers [timercnt]; 2203 timers [active] = timers [timercnt + HEAP0];
1368 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2204 adjustheap (timers, timercnt, active);
1369 } 2205 }
2206 }
1370 2207
1371 ((WT)w)->at -= mn_now; 2208 EV_FREQUENT_CHECK;
2209
2210 ev_at (w) -= mn_now;
1372 2211
1373 ev_stop (EV_A_ (W)w); 2212 ev_stop (EV_A_ (W)w);
1374} 2213}
1375 2214
1376void 2215void noinline
1377ev_timer_again (EV_P_ struct ev_timer *w) 2216ev_timer_again (EV_P_ ev_timer *w)
1378{ 2217{
2218 EV_FREQUENT_CHECK;
2219
1379 if (ev_is_active (w)) 2220 if (ev_is_active (w))
1380 { 2221 {
1381 if (w->repeat) 2222 if (w->repeat)
1382 { 2223 {
1383 ((WT)w)->at = mn_now + w->repeat; 2224 ev_at (w) = mn_now + w->repeat;
2225 ANHE_at_cache (timers [ev_active (w)]);
1384 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2226 adjustheap (timers, timercnt, ev_active (w));
1385 } 2227 }
1386 else 2228 else
1387 ev_timer_stop (EV_A_ w); 2229 ev_timer_stop (EV_A_ w);
1388 } 2230 }
1389 else if (w->repeat) 2231 else if (w->repeat)
1390 { 2232 {
1391 w->at = w->repeat; 2233 ev_at (w) = w->repeat;
1392 ev_timer_start (EV_A_ w); 2234 ev_timer_start (EV_A_ w);
1393 } 2235 }
1394}
1395 2236
2237 EV_FREQUENT_CHECK;
2238}
2239
1396#if EV_PERIODICS 2240#if EV_PERIODIC_ENABLE
1397void 2241void noinline
1398ev_periodic_start (EV_P_ struct ev_periodic *w) 2242ev_periodic_start (EV_P_ ev_periodic *w)
1399{ 2243{
1400 if (ev_is_active (w)) 2244 if (expect_false (ev_is_active (w)))
1401 return; 2245 return;
1402 2246
1403 if (w->reschedule_cb) 2247 if (w->reschedule_cb)
1404 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2248 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1405 else if (w->interval) 2249 else if (w->interval)
1406 { 2250 {
1407 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2251 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1408 /* this formula differs from the one in periodic_reify because we do not always round up */ 2252 /* this formula differs from the one in periodic_reify because we do not always round up */
1409 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2253 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1410 } 2254 }
2255 else
2256 ev_at (w) = w->offset;
1411 2257
2258 EV_FREQUENT_CHECK;
2259
2260 ++periodiccnt;
1412 ev_start (EV_A_ (W)w, ++periodiccnt); 2261 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1413 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 2262 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1414 periodics [periodiccnt - 1] = w; 2263 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1415 upheap ((WT *)periodics, periodiccnt - 1); 2264 ANHE_at_cache (periodics [ev_active (w)]);
2265 upheap (periodics, ev_active (w));
1416 2266
2267 EV_FREQUENT_CHECK;
2268
1417 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2269 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1418} 2270}
1419 2271
1420void 2272void noinline
1421ev_periodic_stop (EV_P_ struct ev_periodic *w) 2273ev_periodic_stop (EV_P_ ev_periodic *w)
1422{ 2274{
1423 ev_clear_pending (EV_A_ (W)w); 2275 clear_pending (EV_A_ (W)w);
1424 if (!ev_is_active (w)) 2276 if (expect_false (!ev_is_active (w)))
1425 return; 2277 return;
1426 2278
2279 EV_FREQUENT_CHECK;
2280
2281 {
2282 int active = ev_active (w);
2283
1427 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2284 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1428 2285
1429 if (((W)w)->active < periodiccnt--) 2286 --periodiccnt;
2287
2288 if (expect_true (active < periodiccnt + HEAP0))
1430 { 2289 {
1431 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2290 periodics [active] = periodics [periodiccnt + HEAP0];
1432 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2291 adjustheap (periodics, periodiccnt, active);
1433 } 2292 }
2293 }
2294
2295 EV_FREQUENT_CHECK;
1434 2296
1435 ev_stop (EV_A_ (W)w); 2297 ev_stop (EV_A_ (W)w);
1436} 2298}
1437 2299
1438void 2300void noinline
1439ev_periodic_again (EV_P_ struct ev_periodic *w) 2301ev_periodic_again (EV_P_ ev_periodic *w)
1440{ 2302{
1441 /* TODO: use adjustheap and recalculation */ 2303 /* TODO: use adjustheap and recalculation */
1442 ev_periodic_stop (EV_A_ w); 2304 ev_periodic_stop (EV_A_ w);
1443 ev_periodic_start (EV_A_ w); 2305 ev_periodic_start (EV_A_ w);
1444} 2306}
1445#endif 2307#endif
1446 2308
1447void
1448ev_idle_start (EV_P_ struct ev_idle *w)
1449{
1450 if (ev_is_active (w))
1451 return;
1452
1453 ev_start (EV_A_ (W)w, ++idlecnt);
1454 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1455 idles [idlecnt - 1] = w;
1456}
1457
1458void
1459ev_idle_stop (EV_P_ struct ev_idle *w)
1460{
1461 ev_clear_pending (EV_A_ (W)w);
1462 if (!ev_is_active (w))
1463 return;
1464
1465 idles [((W)w)->active - 1] = idles [--idlecnt];
1466 ev_stop (EV_A_ (W)w);
1467}
1468
1469void
1470ev_prepare_start (EV_P_ struct ev_prepare *w)
1471{
1472 if (ev_is_active (w))
1473 return;
1474
1475 ev_start (EV_A_ (W)w, ++preparecnt);
1476 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1477 prepares [preparecnt - 1] = w;
1478}
1479
1480void
1481ev_prepare_stop (EV_P_ struct ev_prepare *w)
1482{
1483 ev_clear_pending (EV_A_ (W)w);
1484 if (!ev_is_active (w))
1485 return;
1486
1487 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1488 ev_stop (EV_A_ (W)w);
1489}
1490
1491void
1492ev_check_start (EV_P_ struct ev_check *w)
1493{
1494 if (ev_is_active (w))
1495 return;
1496
1497 ev_start (EV_A_ (W)w, ++checkcnt);
1498 array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
1499 checks [checkcnt - 1] = w;
1500}
1501
1502void
1503ev_check_stop (EV_P_ struct ev_check *w)
1504{
1505 ev_clear_pending (EV_A_ (W)w);
1506 if (!ev_is_active (w))
1507 return;
1508
1509 checks [((W)w)->active - 1] = checks [--checkcnt];
1510 ev_stop (EV_A_ (W)w);
1511}
1512
1513#ifndef SA_RESTART 2309#ifndef SA_RESTART
1514# define SA_RESTART 0 2310# define SA_RESTART 0
1515#endif 2311#endif
1516 2312
1517void 2313void noinline
1518ev_signal_start (EV_P_ struct ev_signal *w) 2314ev_signal_start (EV_P_ ev_signal *w)
1519{ 2315{
1520#if EV_MULTIPLICITY 2316#if EV_MULTIPLICITY
1521 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2317 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1522#endif 2318#endif
1523 if (ev_is_active (w)) 2319 if (expect_false (ev_is_active (w)))
1524 return; 2320 return;
1525 2321
1526 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2322 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1527 2323
2324 evpipe_init (EV_A);
2325
2326 EV_FREQUENT_CHECK;
2327
2328 {
2329#ifndef _WIN32
2330 sigset_t full, prev;
2331 sigfillset (&full);
2332 sigprocmask (SIG_SETMASK, &full, &prev);
2333#endif
2334
2335 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2336
2337#ifndef _WIN32
2338 sigprocmask (SIG_SETMASK, &prev, 0);
2339#endif
2340 }
2341
1528 ev_start (EV_A_ (W)w, 1); 2342 ev_start (EV_A_ (W)w, 1);
1529 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1530 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2343 wlist_add (&signals [w->signum - 1].head, (WL)w);
1531 2344
1532 if (!((WL)w)->next) 2345 if (!((WL)w)->next)
1533 { 2346 {
1534#if _WIN32 2347#if _WIN32
1535 signal (w->signum, sighandler); 2348 signal (w->signum, ev_sighandler);
1536#else 2349#else
1537 struct sigaction sa; 2350 struct sigaction sa;
1538 sa.sa_handler = sighandler; 2351 sa.sa_handler = ev_sighandler;
1539 sigfillset (&sa.sa_mask); 2352 sigfillset (&sa.sa_mask);
1540 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2353 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1541 sigaction (w->signum, &sa, 0); 2354 sigaction (w->signum, &sa, 0);
1542#endif 2355#endif
1543 } 2356 }
1544}
1545 2357
1546void 2358 EV_FREQUENT_CHECK;
2359}
2360
2361void noinline
1547ev_signal_stop (EV_P_ struct ev_signal *w) 2362ev_signal_stop (EV_P_ ev_signal *w)
1548{ 2363{
1549 ev_clear_pending (EV_A_ (W)w); 2364 clear_pending (EV_A_ (W)w);
1550 if (!ev_is_active (w)) 2365 if (expect_false (!ev_is_active (w)))
1551 return; 2366 return;
1552 2367
2368 EV_FREQUENT_CHECK;
2369
1553 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2370 wlist_del (&signals [w->signum - 1].head, (WL)w);
1554 ev_stop (EV_A_ (W)w); 2371 ev_stop (EV_A_ (W)w);
1555 2372
1556 if (!signals [w->signum - 1].head) 2373 if (!signals [w->signum - 1].head)
1557 signal (w->signum, SIG_DFL); 2374 signal (w->signum, SIG_DFL);
1558}
1559 2375
2376 EV_FREQUENT_CHECK;
2377}
2378
1560void 2379void
1561ev_child_start (EV_P_ struct ev_child *w) 2380ev_child_start (EV_P_ ev_child *w)
1562{ 2381{
1563#if EV_MULTIPLICITY 2382#if EV_MULTIPLICITY
1564 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2383 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1565#endif 2384#endif
1566 if (ev_is_active (w)) 2385 if (expect_false (ev_is_active (w)))
1567 return; 2386 return;
1568 2387
2388 EV_FREQUENT_CHECK;
2389
1569 ev_start (EV_A_ (W)w, 1); 2390 ev_start (EV_A_ (W)w, 1);
1570 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2391 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1571}
1572 2392
2393 EV_FREQUENT_CHECK;
2394}
2395
1573void 2396void
1574ev_child_stop (EV_P_ struct ev_child *w) 2397ev_child_stop (EV_P_ ev_child *w)
1575{ 2398{
1576 ev_clear_pending (EV_A_ (W)w); 2399 clear_pending (EV_A_ (W)w);
1577 if (!ev_is_active (w)) 2400 if (expect_false (!ev_is_active (w)))
1578 return; 2401 return;
1579 2402
2403 EV_FREQUENT_CHECK;
2404
1580 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2405 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1581 ev_stop (EV_A_ (W)w); 2406 ev_stop (EV_A_ (W)w);
2407
2408 EV_FREQUENT_CHECK;
1582} 2409}
2410
2411#if EV_STAT_ENABLE
2412
2413# ifdef _WIN32
2414# undef lstat
2415# define lstat(a,b) _stati64 (a,b)
2416# endif
2417
2418#define DEF_STAT_INTERVAL 5.0074891
2419#define MIN_STAT_INTERVAL 0.1074891
2420
2421static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2422
2423#if EV_USE_INOTIFY
2424# define EV_INOTIFY_BUFSIZE 8192
2425
2426static void noinline
2427infy_add (EV_P_ ev_stat *w)
2428{
2429 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
2430
2431 if (w->wd < 0)
2432 {
2433 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2434
2435 /* monitor some parent directory for speedup hints */
2436 /* note that exceeding the hardcoded limit is not a correctness issue, */
2437 /* but an efficiency issue only */
2438 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2439 {
2440 char path [4096];
2441 strcpy (path, w->path);
2442
2443 do
2444 {
2445 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2446 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2447
2448 char *pend = strrchr (path, '/');
2449
2450 if (!pend)
2451 break; /* whoops, no '/', complain to your admin */
2452
2453 *pend = 0;
2454 w->wd = inotify_add_watch (fs_fd, path, mask);
2455 }
2456 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2457 }
2458 }
2459 else
2460 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2461
2462 if (w->wd >= 0)
2463 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2464}
2465
2466static void noinline
2467infy_del (EV_P_ ev_stat *w)
2468{
2469 int slot;
2470 int wd = w->wd;
2471
2472 if (wd < 0)
2473 return;
2474
2475 w->wd = -2;
2476 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2477 wlist_del (&fs_hash [slot].head, (WL)w);
2478
2479 /* remove this watcher, if others are watching it, they will rearm */
2480 inotify_rm_watch (fs_fd, wd);
2481}
2482
2483static void noinline
2484infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2485{
2486 if (slot < 0)
2487 /* overflow, need to check for all hahs slots */
2488 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2489 infy_wd (EV_A_ slot, wd, ev);
2490 else
2491 {
2492 WL w_;
2493
2494 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2495 {
2496 ev_stat *w = (ev_stat *)w_;
2497 w_ = w_->next; /* lets us remove this watcher and all before it */
2498
2499 if (w->wd == wd || wd == -1)
2500 {
2501 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2502 {
2503 w->wd = -1;
2504 infy_add (EV_A_ w); /* re-add, no matter what */
2505 }
2506
2507 stat_timer_cb (EV_A_ &w->timer, 0);
2508 }
2509 }
2510 }
2511}
2512
2513static void
2514infy_cb (EV_P_ ev_io *w, int revents)
2515{
2516 char buf [EV_INOTIFY_BUFSIZE];
2517 struct inotify_event *ev = (struct inotify_event *)buf;
2518 int ofs;
2519 int len = read (fs_fd, buf, sizeof (buf));
2520
2521 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2522 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2523}
2524
2525void inline_size
2526infy_init (EV_P)
2527{
2528 if (fs_fd != -2)
2529 return;
2530
2531 fs_fd = inotify_init ();
2532
2533 if (fs_fd >= 0)
2534 {
2535 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2536 ev_set_priority (&fs_w, EV_MAXPRI);
2537 ev_io_start (EV_A_ &fs_w);
2538 }
2539}
2540
2541void inline_size
2542infy_fork (EV_P)
2543{
2544 int slot;
2545
2546 if (fs_fd < 0)
2547 return;
2548
2549 close (fs_fd);
2550 fs_fd = inotify_init ();
2551
2552 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2553 {
2554 WL w_ = fs_hash [slot].head;
2555 fs_hash [slot].head = 0;
2556
2557 while (w_)
2558 {
2559 ev_stat *w = (ev_stat *)w_;
2560 w_ = w_->next; /* lets us add this watcher */
2561
2562 w->wd = -1;
2563
2564 if (fs_fd >= 0)
2565 infy_add (EV_A_ w); /* re-add, no matter what */
2566 else
2567 ev_timer_start (EV_A_ &w->timer);
2568 }
2569
2570 }
2571}
2572
2573#endif
2574
2575#ifdef _WIN32
2576# define EV_LSTAT(p,b) _stati64 (p, b)
2577#else
2578# define EV_LSTAT(p,b) lstat (p, b)
2579#endif
2580
2581void
2582ev_stat_stat (EV_P_ ev_stat *w)
2583{
2584 if (lstat (w->path, &w->attr) < 0)
2585 w->attr.st_nlink = 0;
2586 else if (!w->attr.st_nlink)
2587 w->attr.st_nlink = 1;
2588}
2589
2590static void noinline
2591stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2592{
2593 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2594
2595 /* we copy this here each the time so that */
2596 /* prev has the old value when the callback gets invoked */
2597 w->prev = w->attr;
2598 ev_stat_stat (EV_A_ w);
2599
2600 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2601 if (
2602 w->prev.st_dev != w->attr.st_dev
2603 || w->prev.st_ino != w->attr.st_ino
2604 || w->prev.st_mode != w->attr.st_mode
2605 || w->prev.st_nlink != w->attr.st_nlink
2606 || w->prev.st_uid != w->attr.st_uid
2607 || w->prev.st_gid != w->attr.st_gid
2608 || w->prev.st_rdev != w->attr.st_rdev
2609 || w->prev.st_size != w->attr.st_size
2610 || w->prev.st_atime != w->attr.st_atime
2611 || w->prev.st_mtime != w->attr.st_mtime
2612 || w->prev.st_ctime != w->attr.st_ctime
2613 ) {
2614 #if EV_USE_INOTIFY
2615 infy_del (EV_A_ w);
2616 infy_add (EV_A_ w);
2617 ev_stat_stat (EV_A_ w); /* avoid race... */
2618 #endif
2619
2620 ev_feed_event (EV_A_ w, EV_STAT);
2621 }
2622}
2623
2624void
2625ev_stat_start (EV_P_ ev_stat *w)
2626{
2627 if (expect_false (ev_is_active (w)))
2628 return;
2629
2630 /* since we use memcmp, we need to clear any padding data etc. */
2631 memset (&w->prev, 0, sizeof (ev_statdata));
2632 memset (&w->attr, 0, sizeof (ev_statdata));
2633
2634 ev_stat_stat (EV_A_ w);
2635
2636 if (w->interval < MIN_STAT_INTERVAL)
2637 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2638
2639 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2640 ev_set_priority (&w->timer, ev_priority (w));
2641
2642#if EV_USE_INOTIFY
2643 infy_init (EV_A);
2644
2645 if (fs_fd >= 0)
2646 infy_add (EV_A_ w);
2647 else
2648#endif
2649 ev_timer_start (EV_A_ &w->timer);
2650
2651 ev_start (EV_A_ (W)w, 1);
2652
2653 EV_FREQUENT_CHECK;
2654}
2655
2656void
2657ev_stat_stop (EV_P_ ev_stat *w)
2658{
2659 clear_pending (EV_A_ (W)w);
2660 if (expect_false (!ev_is_active (w)))
2661 return;
2662
2663 EV_FREQUENT_CHECK;
2664
2665#if EV_USE_INOTIFY
2666 infy_del (EV_A_ w);
2667#endif
2668 ev_timer_stop (EV_A_ &w->timer);
2669
2670 ev_stop (EV_A_ (W)w);
2671
2672 EV_FREQUENT_CHECK;
2673}
2674#endif
2675
2676#if EV_IDLE_ENABLE
2677void
2678ev_idle_start (EV_P_ ev_idle *w)
2679{
2680 if (expect_false (ev_is_active (w)))
2681 return;
2682
2683 pri_adjust (EV_A_ (W)w);
2684
2685 EV_FREQUENT_CHECK;
2686
2687 {
2688 int active = ++idlecnt [ABSPRI (w)];
2689
2690 ++idleall;
2691 ev_start (EV_A_ (W)w, active);
2692
2693 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2694 idles [ABSPRI (w)][active - 1] = w;
2695 }
2696
2697 EV_FREQUENT_CHECK;
2698}
2699
2700void
2701ev_idle_stop (EV_P_ ev_idle *w)
2702{
2703 clear_pending (EV_A_ (W)w);
2704 if (expect_false (!ev_is_active (w)))
2705 return;
2706
2707 EV_FREQUENT_CHECK;
2708
2709 {
2710 int active = ev_active (w);
2711
2712 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2713 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2714
2715 ev_stop (EV_A_ (W)w);
2716 --idleall;
2717 }
2718
2719 EV_FREQUENT_CHECK;
2720}
2721#endif
2722
2723void
2724ev_prepare_start (EV_P_ ev_prepare *w)
2725{
2726 if (expect_false (ev_is_active (w)))
2727 return;
2728
2729 EV_FREQUENT_CHECK;
2730
2731 ev_start (EV_A_ (W)w, ++preparecnt);
2732 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2733 prepares [preparecnt - 1] = w;
2734
2735 EV_FREQUENT_CHECK;
2736}
2737
2738void
2739ev_prepare_stop (EV_P_ ev_prepare *w)
2740{
2741 clear_pending (EV_A_ (W)w);
2742 if (expect_false (!ev_is_active (w)))
2743 return;
2744
2745 EV_FREQUENT_CHECK;
2746
2747 {
2748 int active = ev_active (w);
2749
2750 prepares [active - 1] = prepares [--preparecnt];
2751 ev_active (prepares [active - 1]) = active;
2752 }
2753
2754 ev_stop (EV_A_ (W)w);
2755
2756 EV_FREQUENT_CHECK;
2757}
2758
2759void
2760ev_check_start (EV_P_ ev_check *w)
2761{
2762 if (expect_false (ev_is_active (w)))
2763 return;
2764
2765 EV_FREQUENT_CHECK;
2766
2767 ev_start (EV_A_ (W)w, ++checkcnt);
2768 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2769 checks [checkcnt - 1] = w;
2770
2771 EV_FREQUENT_CHECK;
2772}
2773
2774void
2775ev_check_stop (EV_P_ ev_check *w)
2776{
2777 clear_pending (EV_A_ (W)w);
2778 if (expect_false (!ev_is_active (w)))
2779 return;
2780
2781 EV_FREQUENT_CHECK;
2782
2783 {
2784 int active = ev_active (w);
2785
2786 checks [active - 1] = checks [--checkcnt];
2787 ev_active (checks [active - 1]) = active;
2788 }
2789
2790 ev_stop (EV_A_ (W)w);
2791
2792 EV_FREQUENT_CHECK;
2793}
2794
2795#if EV_EMBED_ENABLE
2796void noinline
2797ev_embed_sweep (EV_P_ ev_embed *w)
2798{
2799 ev_loop (w->other, EVLOOP_NONBLOCK);
2800}
2801
2802static void
2803embed_io_cb (EV_P_ ev_io *io, int revents)
2804{
2805 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2806
2807 if (ev_cb (w))
2808 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2809 else
2810 ev_loop (w->other, EVLOOP_NONBLOCK);
2811}
2812
2813static void
2814embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2815{
2816 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2817
2818 {
2819 struct ev_loop *loop = w->other;
2820
2821 while (fdchangecnt)
2822 {
2823 fd_reify (EV_A);
2824 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2825 }
2826 }
2827}
2828
2829#if 0
2830static void
2831embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2832{
2833 ev_idle_stop (EV_A_ idle);
2834}
2835#endif
2836
2837void
2838ev_embed_start (EV_P_ ev_embed *w)
2839{
2840 if (expect_false (ev_is_active (w)))
2841 return;
2842
2843 {
2844 struct ev_loop *loop = w->other;
2845 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2846 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2847 }
2848
2849 EV_FREQUENT_CHECK;
2850
2851 ev_set_priority (&w->io, ev_priority (w));
2852 ev_io_start (EV_A_ &w->io);
2853
2854 ev_prepare_init (&w->prepare, embed_prepare_cb);
2855 ev_set_priority (&w->prepare, EV_MINPRI);
2856 ev_prepare_start (EV_A_ &w->prepare);
2857
2858 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2859
2860 ev_start (EV_A_ (W)w, 1);
2861
2862 EV_FREQUENT_CHECK;
2863}
2864
2865void
2866ev_embed_stop (EV_P_ ev_embed *w)
2867{
2868 clear_pending (EV_A_ (W)w);
2869 if (expect_false (!ev_is_active (w)))
2870 return;
2871
2872 EV_FREQUENT_CHECK;
2873
2874 ev_io_stop (EV_A_ &w->io);
2875 ev_prepare_stop (EV_A_ &w->prepare);
2876
2877 ev_stop (EV_A_ (W)w);
2878
2879 EV_FREQUENT_CHECK;
2880}
2881#endif
2882
2883#if EV_FORK_ENABLE
2884void
2885ev_fork_start (EV_P_ ev_fork *w)
2886{
2887 if (expect_false (ev_is_active (w)))
2888 return;
2889
2890 EV_FREQUENT_CHECK;
2891
2892 ev_start (EV_A_ (W)w, ++forkcnt);
2893 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2894 forks [forkcnt - 1] = w;
2895
2896 EV_FREQUENT_CHECK;
2897}
2898
2899void
2900ev_fork_stop (EV_P_ ev_fork *w)
2901{
2902 clear_pending (EV_A_ (W)w);
2903 if (expect_false (!ev_is_active (w)))
2904 return;
2905
2906 EV_FREQUENT_CHECK;
2907
2908 {
2909 int active = ev_active (w);
2910
2911 forks [active - 1] = forks [--forkcnt];
2912 ev_active (forks [active - 1]) = active;
2913 }
2914
2915 ev_stop (EV_A_ (W)w);
2916
2917 EV_FREQUENT_CHECK;
2918}
2919#endif
2920
2921#if EV_ASYNC_ENABLE
2922void
2923ev_async_start (EV_P_ ev_async *w)
2924{
2925 if (expect_false (ev_is_active (w)))
2926 return;
2927
2928 evpipe_init (EV_A);
2929
2930 EV_FREQUENT_CHECK;
2931
2932 ev_start (EV_A_ (W)w, ++asynccnt);
2933 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2934 asyncs [asynccnt - 1] = w;
2935
2936 EV_FREQUENT_CHECK;
2937}
2938
2939void
2940ev_async_stop (EV_P_ ev_async *w)
2941{
2942 clear_pending (EV_A_ (W)w);
2943 if (expect_false (!ev_is_active (w)))
2944 return;
2945
2946 EV_FREQUENT_CHECK;
2947
2948 {
2949 int active = ev_active (w);
2950
2951 asyncs [active - 1] = asyncs [--asynccnt];
2952 ev_active (asyncs [active - 1]) = active;
2953 }
2954
2955 ev_stop (EV_A_ (W)w);
2956
2957 EV_FREQUENT_CHECK;
2958}
2959
2960void
2961ev_async_send (EV_P_ ev_async *w)
2962{
2963 w->sent = 1;
2964 evpipe_write (EV_A_ &gotasync);
2965}
2966#endif
1583 2967
1584/*****************************************************************************/ 2968/*****************************************************************************/
1585 2969
1586struct ev_once 2970struct ev_once
1587{ 2971{
1588 struct ev_io io; 2972 ev_io io;
1589 struct ev_timer to; 2973 ev_timer to;
1590 void (*cb)(int revents, void *arg); 2974 void (*cb)(int revents, void *arg);
1591 void *arg; 2975 void *arg;
1592}; 2976};
1593 2977
1594static void 2978static void
… …
1603 2987
1604 cb (revents, arg); 2988 cb (revents, arg);
1605} 2989}
1606 2990
1607static void 2991static void
1608once_cb_io (EV_P_ struct ev_io *w, int revents) 2992once_cb_io (EV_P_ ev_io *w, int revents)
1609{ 2993{
1610 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2994 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1611} 2995}
1612 2996
1613static void 2997static void
1614once_cb_to (EV_P_ struct ev_timer *w, int revents) 2998once_cb_to (EV_P_ ev_timer *w, int revents)
1615{ 2999{
1616 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3000 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1617} 3001}
1618 3002
1619void 3003void
1620ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3004ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1621{ 3005{
1622 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3006 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1623 3007
1624 if (!once) 3008 if (expect_false (!once))
3009 {
1625 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3010 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1626 else 3011 return;
1627 { 3012 }
3013
1628 once->cb = cb; 3014 once->cb = cb;
1629 once->arg = arg; 3015 once->arg = arg;
1630 3016
1631 ev_init (&once->io, once_cb_io); 3017 ev_init (&once->io, once_cb_io);
1632 if (fd >= 0) 3018 if (fd >= 0)
1633 { 3019 {
1634 ev_io_set (&once->io, fd, events); 3020 ev_io_set (&once->io, fd, events);
1635 ev_io_start (EV_A_ &once->io); 3021 ev_io_start (EV_A_ &once->io);
1636 } 3022 }
1637 3023
1638 ev_init (&once->to, once_cb_to); 3024 ev_init (&once->to, once_cb_to);
1639 if (timeout >= 0.) 3025 if (timeout >= 0.)
1640 { 3026 {
1641 ev_timer_set (&once->to, timeout, 0.); 3027 ev_timer_set (&once->to, timeout, 0.);
1642 ev_timer_start (EV_A_ &once->to); 3028 ev_timer_start (EV_A_ &once->to);
1643 }
1644 } 3029 }
1645} 3030}
3031
3032#if EV_MULTIPLICITY
3033 #include "ev_wrap.h"
3034#endif
1646 3035
1647#ifdef __cplusplus 3036#ifdef __cplusplus
1648} 3037}
1649#endif 3038#endif
1650 3039

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