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Comparing libev/ev.c (file contents):
Revision 1.72 by root, Tue Nov 6 16:09:37 2007 UTC vs.
Revision 1.227 by root, Fri May 2 07:20:01 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 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
31#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
32# include "config.h" 49# include "config.h"
50# endif
33 51
34# if HAVE_CLOCK_GETTIME 52# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC
35# define EV_USE_MONOTONIC 1 54# define EV_USE_MONOTONIC 1
55# endif
56# ifndef EV_USE_REALTIME
36# define EV_USE_REALTIME 1 57# define EV_USE_REALTIME 1
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
37# endif 66# endif
38 67
39# if HAVE_SELECT && HAVE_SYS_SELECT_H 68# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
40# define EV_USE_SELECT 1 70# define EV_USE_NANOSLEEP 1
71# else
72# define EV_USE_NANOSLEEP 0
73# endif
41# endif 74# endif
42 75
43# if HAVE_POLL && HAVE_POLL_H 76# ifndef EV_USE_SELECT
77# if HAVE_SELECT && HAVE_SYS_SELECT_H
44# define EV_USE_POLL 1 78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif
45# endif 82# endif
46 83
47# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
48# define EV_USE_EPOLL 1 86# define EV_USE_POLL 1
87# else
88# define EV_USE_POLL 0
89# endif
49# endif 90# endif
50 91
51# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
52# define EV_USE_KQUEUE 1 94# define EV_USE_EPOLL 1
95# else
96# define EV_USE_EPOLL 0
97# endif
53# 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
54 115
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
55#endif 132#endif
56 133
57#include <math.h> 134#include <math.h>
58#include <stdlib.h> 135#include <stdlib.h>
59#include <fcntl.h> 136#include <fcntl.h>
… …
66#include <sys/types.h> 143#include <sys/types.h>
67#include <time.h> 144#include <time.h>
68 145
69#include <signal.h> 146#include <signal.h>
70 147
148#ifdef EV_H
149# include EV_H
150#else
151# include "ev.h"
152#endif
153
71#ifndef WIN32 154#ifndef _WIN32
72# include <unistd.h>
73# include <sys/time.h> 155# include <sys/time.h>
74# include <sys/wait.h> 156# include <sys/wait.h>
157# include <unistd.h>
158#else
159# define WIN32_LEAN_AND_MEAN
160# include <windows.h>
161# ifndef EV_SELECT_IS_WINSOCKET
162# define EV_SELECT_IS_WINSOCKET 1
75#endif 163# endif
76/**/ 164#endif
165
166/* this block tries to deduce configuration from header-defined symbols and defaults */
77 167
78#ifndef EV_USE_MONOTONIC 168#ifndef EV_USE_MONOTONIC
79# define EV_USE_MONOTONIC 1 169# define EV_USE_MONOTONIC 0
170#endif
171
172#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0
174#endif
175
176#ifndef EV_USE_NANOSLEEP
177# define EV_USE_NANOSLEEP 0
80#endif 178#endif
81 179
82#ifndef EV_USE_SELECT 180#ifndef EV_USE_SELECT
83# define EV_USE_SELECT 1 181# define EV_USE_SELECT 1
84#endif 182#endif
85 183
86#ifndef EV_USE_POLL 184#ifndef EV_USE_POLL
87# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ 185# ifdef _WIN32
186# define EV_USE_POLL 0
187# else
188# define EV_USE_POLL 1
189# endif
88#endif 190#endif
89 191
90#ifndef EV_USE_EPOLL 192#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1
195# else
91# define EV_USE_EPOLL 0 196# define EV_USE_EPOLL 0
197# endif
92#endif 198#endif
93 199
94#ifndef EV_USE_KQUEUE 200#ifndef EV_USE_KQUEUE
95# define EV_USE_KQUEUE 0 201# define EV_USE_KQUEUE 0
96#endif 202#endif
97 203
204#ifndef EV_USE_PORT
205# define EV_USE_PORT 0
206#endif
207
98#ifndef EV_USE_WIN32 208#ifndef EV_USE_INOTIFY
99# ifdef WIN32 209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
100# define EV_USE_WIN32 0 /* it does not exist, use select */
101# undef EV_USE_SELECT
102# define EV_USE_SELECT 1 210# define EV_USE_INOTIFY 1
103# else 211# else
104# define EV_USE_WIN32 0 212# define EV_USE_INOTIFY 0
105# endif 213# endif
106#endif 214#endif
107 215
108#ifndef EV_USE_REALTIME 216#ifndef EV_PID_HASHSIZE
109# define EV_USE_REALTIME 1 217# if EV_MINIMAL
218# define EV_PID_HASHSIZE 1
219# else
220# define EV_PID_HASHSIZE 16
110#endif 221# endif
222#endif
111 223
112/**/ 224#ifndef EV_INOTIFY_HASHSIZE
225# if EV_MINIMAL
226# define EV_INOTIFY_HASHSIZE 1
227# else
228# define EV_INOTIFY_HASHSIZE 16
229# endif
230#endif
231
232#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1
235# else
236# define EV_USE_EVENTFD 0
237# endif
238#endif
239
240/* this block fixes any misconfiguration where we know we run into trouble otherwise */
113 241
114#ifndef CLOCK_MONOTONIC 242#ifndef CLOCK_MONOTONIC
115# undef EV_USE_MONOTONIC 243# undef EV_USE_MONOTONIC
116# define EV_USE_MONOTONIC 0 244# define EV_USE_MONOTONIC 0
117#endif 245#endif
… …
119#ifndef CLOCK_REALTIME 247#ifndef CLOCK_REALTIME
120# undef EV_USE_REALTIME 248# undef EV_USE_REALTIME
121# define EV_USE_REALTIME 0 249# define EV_USE_REALTIME 0
122#endif 250#endif
123 251
252#if !EV_STAT_ENABLE
253# undef EV_USE_INOTIFY
254# define EV_USE_INOTIFY 0
255#endif
256
257#if !EV_USE_NANOSLEEP
258# ifndef _WIN32
259# include <sys/select.h>
260# endif
261#endif
262
263#if EV_USE_INOTIFY
264# include <sys/inotify.h>
265#endif
266
267#if EV_SELECT_IS_WINSOCKET
268# include <winsock.h>
269#endif
270
271#if EV_USE_EVENTFD
272/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
273# include <stdint.h>
274# ifdef __cplusplus
275extern "C" {
276# endif
277int eventfd (unsigned int initval, int flags);
278# ifdef __cplusplus
279}
280# endif
281#endif
282
124/**/ 283/**/
125 284
285/*
286 * This is used to avoid floating point rounding problems.
287 * It is added to ev_rt_now when scheduling periodics
288 * to ensure progress, time-wise, even when rounding
289 * errors are against us.
290 * This value is good at least till the year 4000.
291 * Better solutions welcome.
292 */
293#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
294
126#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 295#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
127#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 296#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
128#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
129/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ 297/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
130 298
131#include "ev.h"
132
133#if __GNUC__ >= 3 299#if __GNUC__ >= 4
134# define expect(expr,value) __builtin_expect ((expr),(value)) 300# define expect(expr,value) __builtin_expect ((expr),(value))
135# define inline inline 301# define noinline __attribute__ ((noinline))
136#else 302#else
137# define expect(expr,value) (expr) 303# define expect(expr,value) (expr)
138# define inline static 304# define noinline
305# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
306# define inline
307# endif
139#endif 308#endif
140 309
141#define expect_false(expr) expect ((expr) != 0, 0) 310#define expect_false(expr) expect ((expr) != 0, 0)
142#define expect_true(expr) expect ((expr) != 0, 1) 311#define expect_true(expr) expect ((expr) != 0, 1)
312#define inline_size static inline
313
314#if EV_MINIMAL
315# define inline_speed static noinline
316#else
317# define inline_speed static inline
318#endif
143 319
144#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 320#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
145#define ABSPRI(w) ((w)->priority - EV_MINPRI) 321#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
146 322
323#define EMPTY /* required for microsofts broken pseudo-c compiler */
324#define EMPTY2(a,b) /* used to suppress some warnings */
325
147typedef struct ev_watcher *W; 326typedef ev_watcher *W;
148typedef struct ev_watcher_list *WL; 327typedef ev_watcher_list *WL;
149typedef struct ev_watcher_time *WT; 328typedef ev_watcher_time *WT;
150 329
330#if EV_USE_MONOTONIC
331/* sig_atomic_t is used to avoid per-thread variables or locking but still */
332/* giving it a reasonably high chance of working on typical architetcures */
151static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 333static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
334#endif
152 335
153#if WIN32 336#ifdef _WIN32
154/* note: the comment below could not be substantiated, but what would I care */ 337# include "ev_win32.c"
155/* MSDN says this is required to handle SIGFPE */
156volatile double SIGFPE_REQ = 0.0f;
157
158static int
159ev_socketpair_tcp (int filedes [2])
160{
161 struct sockaddr_in addr = { 0 };
162 int addr_size = sizeof (addr);
163 SOCKET listener;
164 SOCKET sock [2] = { -1, -1 };
165
166 if ((listener = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)
167 return -1;
168
169 addr.sin_family = AF_INET;
170 addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
171 addr.sin_port = 0;
172
173 if (bind (listener, (struct sockaddr *)&addr, addr_size))
174 goto fail;
175
176 if (getsockname(listener, (struct sockaddr *)&addr, &addr_size))
177 goto fail;
178
179 if (listen (listener, 1))
180 goto fail;
181
182 if ((sock [0] = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)
183 goto fail;
184
185 if (connect (sock[0], (struct sockaddr *)&addr, addr_size))
186 goto fail;
187
188 if ((sock[1] = accept (listener, 0, 0)) < 0)
189 goto fail;
190
191 closesocket (listener);
192
193 filedes [0] = sock [0];
194 filedes [1] = sock [1];
195
196 return 0;
197
198fail:
199 closesocket (listener);
200
201 if (sock [0] != INVALID_SOCKET) closesocket (sock [0]);
202 if (sock [1] != INVALID_SOCKET) closesocket (sock [1]);
203
204 return -1;
205}
206
207# define ev_pipe(filedes) ev_socketpair_tcp (filedes)
208#else
209# define ev_pipe(filedes) pipe (filedes)
210#endif 338#endif
211 339
212/*****************************************************************************/ 340/*****************************************************************************/
213 341
214static void (*syserr_cb)(const char *msg); 342static void (*syserr_cb)(const char *msg);
215 343
344void
216void ev_set_syserr_cb (void (*cb)(const char *msg)) 345ev_set_syserr_cb (void (*cb)(const char *msg))
217{ 346{
218 syserr_cb = cb; 347 syserr_cb = cb;
219} 348}
220 349
221static void 350static void noinline
222syserr (const char *msg) 351syserr (const char *msg)
223{ 352{
224 if (!msg) 353 if (!msg)
225 msg = "(libev) system error"; 354 msg = "(libev) system error";
226 355
… …
231 perror (msg); 360 perror (msg);
232 abort (); 361 abort ();
233 } 362 }
234} 363}
235 364
365static void *
366ev_realloc_emul (void *ptr, long size)
367{
368 /* some systems, notably openbsd and darwin, fail to properly
369 * implement realloc (x, 0) (as required by both ansi c-98 and
370 * the single unix specification, so work around them here.
371 */
372
373 if (size)
374 return realloc (ptr, size);
375
376 free (ptr);
377 return 0;
378}
379
236static void *(*alloc)(void *ptr, long size); 380static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
237 381
382void
238void ev_set_allocator (void *(*cb)(void *ptr, long size)) 383ev_set_allocator (void *(*cb)(void *ptr, long size))
239{ 384{
240 alloc = cb; 385 alloc = cb;
241} 386}
242 387
243static void * 388inline_speed void *
244ev_realloc (void *ptr, long size) 389ev_realloc (void *ptr, long size)
245{ 390{
246 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 391 ptr = alloc (ptr, size);
247 392
248 if (!ptr && size) 393 if (!ptr && size)
249 { 394 {
250 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 395 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
251 abort (); 396 abort ();
… …
262typedef struct 407typedef struct
263{ 408{
264 WL head; 409 WL head;
265 unsigned char events; 410 unsigned char events;
266 unsigned char reify; 411 unsigned char reify;
412#if EV_SELECT_IS_WINSOCKET
413 SOCKET handle;
414#endif
267} ANFD; 415} ANFD;
268 416
269typedef struct 417typedef struct
270{ 418{
271 W w; 419 W w;
272 int events; 420 int events;
273} ANPENDING; 421} ANPENDING;
274 422
423#if EV_USE_INOTIFY
424typedef struct
425{
426 WL head;
427} ANFS;
428#endif
429
275#if EV_MULTIPLICITY 430#if EV_MULTIPLICITY
276 431
277struct ev_loop 432 struct ev_loop
278{ 433 {
434 ev_tstamp ev_rt_now;
435 #define ev_rt_now ((loop)->ev_rt_now)
279# define VAR(name,decl) decl; 436 #define VAR(name,decl) decl;
280# include "ev_vars.h" 437 #include "ev_vars.h"
281};
282# undef VAR 438 #undef VAR
439 };
283# include "ev_wrap.h" 440 #include "ev_wrap.h"
441
442 static struct ev_loop default_loop_struct;
443 struct ev_loop *ev_default_loop_ptr;
284 444
285#else 445#else
286 446
447 ev_tstamp ev_rt_now;
287# define VAR(name,decl) static decl; 448 #define VAR(name,decl) static decl;
288# include "ev_vars.h" 449 #include "ev_vars.h"
289# undef VAR 450 #undef VAR
451
452 static int ev_default_loop_ptr;
290 453
291#endif 454#endif
292 455
293/*****************************************************************************/ 456/*****************************************************************************/
294 457
295inline ev_tstamp 458ev_tstamp
296ev_time (void) 459ev_time (void)
297{ 460{
298#if EV_USE_REALTIME 461#if EV_USE_REALTIME
299 struct timespec ts; 462 struct timespec ts;
300 clock_gettime (CLOCK_REALTIME, &ts); 463 clock_gettime (CLOCK_REALTIME, &ts);
… …
304 gettimeofday (&tv, 0); 467 gettimeofday (&tv, 0);
305 return tv.tv_sec + tv.tv_usec * 1e-6; 468 return tv.tv_sec + tv.tv_usec * 1e-6;
306#endif 469#endif
307} 470}
308 471
309inline ev_tstamp 472ev_tstamp inline_size
310get_clock (void) 473get_clock (void)
311{ 474{
312#if EV_USE_MONOTONIC 475#if EV_USE_MONOTONIC
313 if (expect_true (have_monotonic)) 476 if (expect_true (have_monotonic))
314 { 477 {
… …
319#endif 482#endif
320 483
321 return ev_time (); 484 return ev_time ();
322} 485}
323 486
487#if EV_MULTIPLICITY
324ev_tstamp 488ev_tstamp
325ev_now (EV_P) 489ev_now (EV_P)
326{ 490{
327 return rt_now; 491 return ev_rt_now;
328} 492}
493#endif
329 494
330#define array_roundsize(base,n) ((n) | 4 & ~3) 495void
496ev_sleep (ev_tstamp delay)
497{
498 if (delay > 0.)
499 {
500#if EV_USE_NANOSLEEP
501 struct timespec ts;
331 502
503 ts.tv_sec = (time_t)delay;
504 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
505
506 nanosleep (&ts, 0);
507#elif defined(_WIN32)
508 Sleep ((unsigned long)(delay * 1e3));
509#else
510 struct timeval tv;
511
512 tv.tv_sec = (time_t)delay;
513 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
514
515 select (0, 0, 0, 0, &tv);
516#endif
517 }
518}
519
520/*****************************************************************************/
521
522int inline_size
523array_nextsize (int elem, int cur, int cnt)
524{
525 int ncur = cur + 1;
526
527 do
528 ncur <<= 1;
529 while (cnt > ncur);
530
531 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
532 if (elem * ncur > 4096)
533 {
534 ncur *= elem;
535 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
536 ncur = ncur - sizeof (void *) * 4;
537 ncur /= elem;
538 }
539
540 return ncur;
541}
542
543static noinline void *
544array_realloc (int elem, void *base, int *cur, int cnt)
545{
546 *cur = array_nextsize (elem, *cur, cnt);
547 return ev_realloc (base, elem * *cur);
548}
549
332#define array_needsize(base,cur,cnt,init) \ 550#define array_needsize(type,base,cur,cnt,init) \
333 if (expect_false ((cnt) > cur)) \ 551 if (expect_false ((cnt) > (cur))) \
334 { \ 552 { \
335 int newcnt = cur; \ 553 int ocur_ = (cur); \
336 do \ 554 (base) = (type *)array_realloc \
337 { \ 555 (sizeof (type), (base), &(cur), (cnt)); \
338 newcnt = array_roundsize (base, newcnt << 1); \ 556 init ((base) + (ocur_), (cur) - ocur_); \
339 } \
340 while ((cnt) > newcnt); \
341 \
342 base = ev_realloc (base, sizeof (*base) * (newcnt)); \
343 init (base + cur, newcnt - cur); \
344 cur = newcnt; \
345 } 557 }
346 558
559#if 0
347#define array_slim(stem) \ 560#define array_slim(type,stem) \
348 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 561 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
349 { \ 562 { \
350 stem ## max = array_roundsize (stem ## cnt >> 1); \ 563 stem ## max = array_roundsize (stem ## cnt >> 1); \
351 base = ev_realloc (base, sizeof (*base) * (stem ## max)); \ 564 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
352 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 565 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
353 } 566 }
354 567#endif
355/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
356/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
357#define array_free_microshit(stem) \
358 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
359 568
360#define array_free(stem, idx) \ 569#define array_free(stem, idx) \
361 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 570 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
362 571
363/*****************************************************************************/ 572/*****************************************************************************/
364 573
365static void 574void noinline
575ev_feed_event (EV_P_ void *w, int revents)
576{
577 W w_ = (W)w;
578 int pri = ABSPRI (w_);
579
580 if (expect_false (w_->pending))
581 pendings [pri][w_->pending - 1].events |= revents;
582 else
583 {
584 w_->pending = ++pendingcnt [pri];
585 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
586 pendings [pri][w_->pending - 1].w = w_;
587 pendings [pri][w_->pending - 1].events = revents;
588 }
589}
590
591void inline_speed
592queue_events (EV_P_ W *events, int eventcnt, int type)
593{
594 int i;
595
596 for (i = 0; i < eventcnt; ++i)
597 ev_feed_event (EV_A_ events [i], type);
598}
599
600/*****************************************************************************/
601
602void inline_size
366anfds_init (ANFD *base, int count) 603anfds_init (ANFD *base, int count)
367{ 604{
368 while (count--) 605 while (count--)
369 { 606 {
370 base->head = 0; 607 base->head = 0;
… …
373 610
374 ++base; 611 ++base;
375 } 612 }
376} 613}
377 614
378static void 615void inline_speed
379event (EV_P_ W w, int events)
380{
381 if (w->pending)
382 {
383 pendings [ABSPRI (w)][w->pending - 1].events |= events;
384 return;
385 }
386
387 w->pending = ++pendingcnt [ABSPRI (w)];
388 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
389 pendings [ABSPRI (w)][w->pending - 1].w = w;
390 pendings [ABSPRI (w)][w->pending - 1].events = events;
391}
392
393static void
394queue_events (EV_P_ W *events, int eventcnt, int type)
395{
396 int i;
397
398 for (i = 0; i < eventcnt; ++i)
399 event (EV_A_ events [i], type);
400}
401
402static void
403fd_event (EV_P_ int fd, int events) 616fd_event (EV_P_ int fd, int revents)
404{ 617{
405 ANFD *anfd = anfds + fd; 618 ANFD *anfd = anfds + fd;
406 struct ev_io *w; 619 ev_io *w;
407 620
408 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 621 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
409 { 622 {
410 int ev = w->events & events; 623 int ev = w->events & revents;
411 624
412 if (ev) 625 if (ev)
413 event (EV_A_ (W)w, ev); 626 ev_feed_event (EV_A_ (W)w, ev);
414 } 627 }
415} 628}
416 629
417/*****************************************************************************/ 630void
631ev_feed_fd_event (EV_P_ int fd, int revents)
632{
633 if (fd >= 0 && fd < anfdmax)
634 fd_event (EV_A_ fd, revents);
635}
418 636
419static void 637void inline_size
420fd_reify (EV_P) 638fd_reify (EV_P)
421{ 639{
422 int i; 640 int i;
423 641
424 for (i = 0; i < fdchangecnt; ++i) 642 for (i = 0; i < fdchangecnt; ++i)
425 { 643 {
426 int fd = fdchanges [i]; 644 int fd = fdchanges [i];
427 ANFD *anfd = anfds + fd; 645 ANFD *anfd = anfds + fd;
428 struct ev_io *w; 646 ev_io *w;
429 647
430 int events = 0; 648 unsigned char events = 0;
431 649
432 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 650 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
433 events |= w->events; 651 events |= (unsigned char)w->events;
434 652
653#if EV_SELECT_IS_WINSOCKET
654 if (events)
655 {
656 unsigned long argp;
657 #ifdef EV_FD_TO_WIN32_HANDLE
658 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
659 #else
660 anfd->handle = _get_osfhandle (fd);
661 #endif
662 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
663 }
664#endif
665
666 {
667 unsigned char o_events = anfd->events;
668 unsigned char o_reify = anfd->reify;
669
435 anfd->reify = 0; 670 anfd->reify = 0;
436
437 method_modify (EV_A_ fd, anfd->events, events);
438 anfd->events = events; 671 anfd->events = events;
672
673 if (o_events != events || o_reify & EV_IOFDSET)
674 backend_modify (EV_A_ fd, o_events, events);
675 }
439 } 676 }
440 677
441 fdchangecnt = 0; 678 fdchangecnt = 0;
442} 679}
443 680
444static void 681void inline_size
445fd_change (EV_P_ int fd) 682fd_change (EV_P_ int fd, int flags)
446{ 683{
447 if (anfds [fd].reify) 684 unsigned char reify = anfds [fd].reify;
448 return;
449
450 anfds [fd].reify = 1; 685 anfds [fd].reify |= flags;
451 686
687 if (expect_true (!reify))
688 {
452 ++fdchangecnt; 689 ++fdchangecnt;
453 array_needsize (fdchanges, fdchangemax, fdchangecnt, (void)); 690 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
454 fdchanges [fdchangecnt - 1] = fd; 691 fdchanges [fdchangecnt - 1] = fd;
692 }
455} 693}
456 694
457static void 695void inline_speed
458fd_kill (EV_P_ int fd) 696fd_kill (EV_P_ int fd)
459{ 697{
460 struct ev_io *w; 698 ev_io *w;
461 699
462 while ((w = (struct ev_io *)anfds [fd].head)) 700 while ((w = (ev_io *)anfds [fd].head))
463 { 701 {
464 ev_io_stop (EV_A_ w); 702 ev_io_stop (EV_A_ w);
465 event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 703 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
466 } 704 }
467} 705}
468 706
469static int 707int inline_size
470fd_valid (int fd) 708fd_valid (int fd)
471{ 709{
472#ifdef WIN32 710#ifdef _WIN32
473 return !!win32_get_osfhandle (fd); 711 return _get_osfhandle (fd) != -1;
474#else 712#else
475 return fcntl (fd, F_GETFD) != -1; 713 return fcntl (fd, F_GETFD) != -1;
476#endif 714#endif
477} 715}
478 716
479/* called on EBADF to verify fds */ 717/* called on EBADF to verify fds */
480static void 718static void noinline
481fd_ebadf (EV_P) 719fd_ebadf (EV_P)
482{ 720{
483 int fd; 721 int fd;
484 722
485 for (fd = 0; fd < anfdmax; ++fd) 723 for (fd = 0; fd < anfdmax; ++fd)
… …
487 if (!fd_valid (fd) == -1 && errno == EBADF) 725 if (!fd_valid (fd) == -1 && errno == EBADF)
488 fd_kill (EV_A_ fd); 726 fd_kill (EV_A_ fd);
489} 727}
490 728
491/* called on ENOMEM in select/poll to kill some fds and retry */ 729/* called on ENOMEM in select/poll to kill some fds and retry */
492static void 730static void noinline
493fd_enomem (EV_P) 731fd_enomem (EV_P)
494{ 732{
495 int fd; 733 int fd;
496 734
497 for (fd = anfdmax; fd--; ) 735 for (fd = anfdmax; fd--; )
… …
500 fd_kill (EV_A_ fd); 738 fd_kill (EV_A_ fd);
501 return; 739 return;
502 } 740 }
503} 741}
504 742
505/* usually called after fork if method needs to re-arm all fds from scratch */ 743/* usually called after fork if backend needs to re-arm all fds from scratch */
506static void 744static void noinline
507fd_rearm_all (EV_P) 745fd_rearm_all (EV_P)
508{ 746{
509 int fd; 747 int fd;
510 748
511 /* this should be highly optimised to not do anything but set a flag */
512 for (fd = 0; fd < anfdmax; ++fd) 749 for (fd = 0; fd < anfdmax; ++fd)
513 if (anfds [fd].events) 750 if (anfds [fd].events)
514 { 751 {
515 anfds [fd].events = 0; 752 anfds [fd].events = 0;
516 fd_change (EV_A_ fd); 753 fd_change (EV_A_ fd, EV_IOFDSET | 1);
517 } 754 }
518} 755}
519 756
520/*****************************************************************************/ 757/*****************************************************************************/
521 758
522static void 759/* towards the root */
760void inline_speed
523upheap (WT *heap, int k) 761upheap (WT *heap, int k)
524{ 762{
525 WT w = heap [k]; 763 WT w = heap [k];
526 764
527 while (k && heap [k >> 1]->at > w->at) 765 while (k)
528 { 766 {
767 int p = (k - 1) >> 1;
768
769 if (heap [p]->at <= w->at)
770 break;
771
529 heap [k] = heap [k >> 1]; 772 heap [k] = heap [p];
530 ((W)heap [k])->active = k + 1; 773 ((W)heap [k])->active = k + 1;
531 k >>= 1; 774 k = p;
532 } 775 }
533 776
534 heap [k] = w; 777 heap [k] = w;
535 ((W)heap [k])->active = k + 1; 778 ((W)heap [k])->active = k + 1;
536
537} 779}
538 780
539static void 781/* away from the root */
782void inline_speed
540downheap (WT *heap, int N, int k) 783downheap (WT *heap, int N, int k)
541{ 784{
542 WT w = heap [k]; 785 WT w = heap [k];
543 786
544 while (k < (N >> 1)) 787 for (;;)
545 { 788 {
546 int j = k << 1; 789 int c = (k << 1) + 1;
547 790
548 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 791 if (c >= N)
549 ++j;
550
551 if (w->at <= heap [j]->at)
552 break; 792 break;
553 793
794 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
795 ? 1 : 0;
796
797 if (w->at <= heap [c]->at)
798 break;
799
554 heap [k] = heap [j]; 800 heap [k] = heap [c];
555 ((W)heap [k])->active = k + 1; 801 ((W)heap [k])->active = k + 1;
802
556 k = j; 803 k = c;
557 } 804 }
558 805
559 heap [k] = w; 806 heap [k] = w;
560 ((W)heap [k])->active = k + 1; 807 ((W)heap [k])->active = k + 1;
561} 808}
562 809
810void inline_size
811adjustheap (WT *heap, int N, int k)
812{
813 upheap (heap, k);
814 downheap (heap, N, k);
815}
816
563/*****************************************************************************/ 817/*****************************************************************************/
564 818
565typedef struct 819typedef struct
566{ 820{
567 WL head; 821 WL head;
568 sig_atomic_t volatile gotsig; 822 EV_ATOMIC_T gotsig;
569} ANSIG; 823} ANSIG;
570 824
571static ANSIG *signals; 825static ANSIG *signals;
572static int signalmax; 826static int signalmax;
573 827
574static int sigpipe [2]; 828static EV_ATOMIC_T gotsig;
575static sig_atomic_t volatile gotsig;
576static struct ev_io sigev;
577 829
578static void 830void inline_size
579signals_init (ANSIG *base, int count) 831signals_init (ANSIG *base, int count)
580{ 832{
581 while (count--) 833 while (count--)
582 { 834 {
583 base->head = 0; 835 base->head = 0;
… …
585 837
586 ++base; 838 ++base;
587 } 839 }
588} 840}
589 841
842/*****************************************************************************/
843
844void inline_speed
845fd_intern (int fd)
846{
847#ifdef _WIN32
848 int arg = 1;
849 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
850#else
851 fcntl (fd, F_SETFD, FD_CLOEXEC);
852 fcntl (fd, F_SETFL, O_NONBLOCK);
853#endif
854}
855
856static void noinline
857evpipe_init (EV_P)
858{
859 if (!ev_is_active (&pipeev))
860 {
861#if EV_USE_EVENTFD
862 if ((evfd = eventfd (0, 0)) >= 0)
863 {
864 evpipe [0] = -1;
865 fd_intern (evfd);
866 ev_io_set (&pipeev, evfd, EV_READ);
867 }
868 else
869#endif
870 {
871 while (pipe (evpipe))
872 syserr ("(libev) error creating signal/async pipe");
873
874 fd_intern (evpipe [0]);
875 fd_intern (evpipe [1]);
876 ev_io_set (&pipeev, evpipe [0], EV_READ);
877 }
878
879 ev_io_start (EV_A_ &pipeev);
880 ev_unref (EV_A); /* watcher should not keep loop alive */
881 }
882}
883
884void inline_size
885evpipe_write (EV_P_ EV_ATOMIC_T *flag)
886{
887 if (!*flag)
888 {
889 int old_errno = errno; /* save errno because write might clobber it */
890
891 *flag = 1;
892
893#if EV_USE_EVENTFD
894 if (evfd >= 0)
895 {
896 uint64_t counter = 1;
897 write (evfd, &counter, sizeof (uint64_t));
898 }
899 else
900#endif
901 write (evpipe [1], &old_errno, 1);
902
903 errno = old_errno;
904 }
905}
906
590static void 907static void
908pipecb (EV_P_ ev_io *iow, int revents)
909{
910#if EV_USE_EVENTFD
911 if (evfd >= 0)
912 {
913 uint64_t counter = 1;
914 read (evfd, &counter, sizeof (uint64_t));
915 }
916 else
917#endif
918 {
919 char dummy;
920 read (evpipe [0], &dummy, 1);
921 }
922
923 if (gotsig && ev_is_default_loop (EV_A))
924 {
925 int signum;
926 gotsig = 0;
927
928 for (signum = signalmax; signum--; )
929 if (signals [signum].gotsig)
930 ev_feed_signal_event (EV_A_ signum + 1);
931 }
932
933#if EV_ASYNC_ENABLE
934 if (gotasync)
935 {
936 int i;
937 gotasync = 0;
938
939 for (i = asynccnt; i--; )
940 if (asyncs [i]->sent)
941 {
942 asyncs [i]->sent = 0;
943 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
944 }
945 }
946#endif
947}
948
949/*****************************************************************************/
950
951static void
591sighandler (int signum) 952ev_sighandler (int signum)
592{ 953{
954#if EV_MULTIPLICITY
955 struct ev_loop *loop = &default_loop_struct;
956#endif
957
593#if WIN32 958#if _WIN32
594 signal (signum, sighandler); 959 signal (signum, ev_sighandler);
595#endif 960#endif
596 961
597 signals [signum - 1].gotsig = 1; 962 signals [signum - 1].gotsig = 1;
598 963 evpipe_write (EV_A_ &gotsig);
599 if (!gotsig)
600 {
601 int old_errno = errno;
602 gotsig = 1;
603 write (sigpipe [1], &signum, 1);
604 errno = old_errno;
605 }
606} 964}
607 965
608static void 966void noinline
609sigcb (EV_P_ struct ev_io *iow, int revents) 967ev_feed_signal_event (EV_P_ int signum)
610{ 968{
611 WL w; 969 WL w;
970
971#if EV_MULTIPLICITY
972 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
973#endif
974
612 int signum; 975 --signum;
613 976
614 read (sigpipe [0], &revents, 1); 977 if (signum < 0 || signum >= signalmax)
615 gotsig = 0; 978 return;
616 979
617 for (signum = signalmax; signum--; )
618 if (signals [signum].gotsig)
619 {
620 signals [signum].gotsig = 0; 980 signals [signum].gotsig = 0;
621 981
622 for (w = signals [signum].head; w; w = w->next) 982 for (w = signals [signum].head; w; w = w->next)
623 event (EV_A_ (W)w, EV_SIGNAL); 983 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
624 }
625}
626
627static void
628siginit (EV_P)
629{
630#ifndef WIN32
631 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
632 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
633
634 /* rather than sort out wether we really need nb, set it */
635 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
636 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
637#endif
638
639 ev_io_set (&sigev, sigpipe [0], EV_READ);
640 ev_io_start (EV_A_ &sigev);
641 ev_unref (EV_A); /* child watcher should not keep loop alive */
642} 984}
643 985
644/*****************************************************************************/ 986/*****************************************************************************/
645 987
646static struct ev_child *childs [PID_HASHSIZE]; 988static WL childs [EV_PID_HASHSIZE];
647 989
648#ifndef WIN32 990#ifndef _WIN32
649 991
650static struct ev_signal childev; 992static ev_signal childev;
993
994#ifndef WIFCONTINUED
995# define WIFCONTINUED(status) 0
996#endif
997
998void inline_speed
999child_reap (EV_P_ int chain, int pid, int status)
1000{
1001 ev_child *w;
1002 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1003
1004 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1005 {
1006 if ((w->pid == pid || !w->pid)
1007 && (!traced || (w->flags & 1)))
1008 {
1009 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1010 w->rpid = pid;
1011 w->rstatus = status;
1012 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1013 }
1014 }
1015}
651 1016
652#ifndef WCONTINUED 1017#ifndef WCONTINUED
653# define WCONTINUED 0 1018# define WCONTINUED 0
654#endif 1019#endif
655 1020
656static void 1021static void
657child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
658{
659 struct ev_child *w;
660
661 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
662 if (w->pid == pid || !w->pid)
663 {
664 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
665 w->rpid = pid;
666 w->rstatus = status;
667 event (EV_A_ (W)w, EV_CHILD);
668 }
669}
670
671static void
672childcb (EV_P_ struct ev_signal *sw, int revents) 1022childcb (EV_P_ ev_signal *sw, int revents)
673{ 1023{
674 int pid, status; 1024 int pid, status;
675 1025
1026 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
676 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1027 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
677 { 1028 if (!WCONTINUED
1029 || errno != EINVAL
1030 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1031 return;
1032
678 /* make sure we are called again until all childs have been reaped */ 1033 /* make sure we are called again until all children have been reaped */
1034 /* we need to do it this way so that the callback gets called before we continue */
679 event (EV_A_ (W)sw, EV_SIGNAL); 1035 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
680 1036
681 child_reap (EV_A_ sw, pid, pid, status); 1037 child_reap (EV_A_ pid, pid, status);
1038 if (EV_PID_HASHSIZE > 1)
682 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1039 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
683 }
684} 1040}
685 1041
686#endif 1042#endif
687 1043
688/*****************************************************************************/ 1044/*****************************************************************************/
689 1045
1046#if EV_USE_PORT
1047# include "ev_port.c"
1048#endif
690#if EV_USE_KQUEUE 1049#if EV_USE_KQUEUE
691# include "ev_kqueue.c" 1050# include "ev_kqueue.c"
692#endif 1051#endif
693#if EV_USE_EPOLL 1052#if EV_USE_EPOLL
694# include "ev_epoll.c" 1053# include "ev_epoll.c"
… …
711{ 1070{
712 return EV_VERSION_MINOR; 1071 return EV_VERSION_MINOR;
713} 1072}
714 1073
715/* return true if we are running with elevated privileges and should ignore env variables */ 1074/* return true if we are running with elevated privileges and should ignore env variables */
716static int 1075int inline_size
717enable_secure (void) 1076enable_secure (void)
718{ 1077{
719#ifdef WIN32 1078#ifdef _WIN32
720 return 0; 1079 return 0;
721#else 1080#else
722 return getuid () != geteuid () 1081 return getuid () != geteuid ()
723 || getgid () != getegid (); 1082 || getgid () != getegid ();
724#endif 1083#endif
725} 1084}
726 1085
727int 1086unsigned int
728ev_method (EV_P) 1087ev_supported_backends (void)
729{ 1088{
730 return method; 1089 unsigned int flags = 0;
731}
732 1090
733static void 1091 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
734loop_init (EV_P_ int methods) 1092 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1093 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1094 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1095 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1096
1097 return flags;
1098}
1099
1100unsigned int
1101ev_recommended_backends (void)
735{ 1102{
736 if (!method) 1103 unsigned int flags = ev_supported_backends ();
1104
1105#ifndef __NetBSD__
1106 /* kqueue is borked on everything but netbsd apparently */
1107 /* it usually doesn't work correctly on anything but sockets and pipes */
1108 flags &= ~EVBACKEND_KQUEUE;
1109#endif
1110#ifdef __APPLE__
1111 // flags &= ~EVBACKEND_KQUEUE; for documentation
1112 flags &= ~EVBACKEND_POLL;
1113#endif
1114
1115 return flags;
1116}
1117
1118unsigned int
1119ev_embeddable_backends (void)
1120{
1121 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1122
1123 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1124 /* please fix it and tell me how to detect the fix */
1125 flags &= ~EVBACKEND_EPOLL;
1126
1127 return flags;
1128}
1129
1130unsigned int
1131ev_backend (EV_P)
1132{
1133 return backend;
1134}
1135
1136unsigned int
1137ev_loop_count (EV_P)
1138{
1139 return loop_count;
1140}
1141
1142void
1143ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1144{
1145 io_blocktime = interval;
1146}
1147
1148void
1149ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1150{
1151 timeout_blocktime = interval;
1152}
1153
1154static void noinline
1155loop_init (EV_P_ unsigned int flags)
1156{
1157 if (!backend)
737 { 1158 {
738#if EV_USE_MONOTONIC 1159#if EV_USE_MONOTONIC
739 { 1160 {
740 struct timespec ts; 1161 struct timespec ts;
741 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1162 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
742 have_monotonic = 1; 1163 have_monotonic = 1;
743 } 1164 }
744#endif 1165#endif
745 1166
746 rt_now = ev_time (); 1167 ev_rt_now = ev_time ();
747 mn_now = get_clock (); 1168 mn_now = get_clock ();
748 now_floor = mn_now; 1169 now_floor = mn_now;
749 rtmn_diff = rt_now - mn_now; 1170 rtmn_diff = ev_rt_now - mn_now;
750 1171
751 if (methods == EVMETHOD_AUTO) 1172 io_blocktime = 0.;
752 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1173 timeout_blocktime = 0.;
1174 backend = 0;
1175 backend_fd = -1;
1176 gotasync = 0;
1177#if EV_USE_INOTIFY
1178 fs_fd = -2;
1179#endif
1180
1181 /* pid check not overridable via env */
1182#ifndef _WIN32
1183 if (flags & EVFLAG_FORKCHECK)
1184 curpid = getpid ();
1185#endif
1186
1187 if (!(flags & EVFLAG_NOENV)
1188 && !enable_secure ()
1189 && getenv ("LIBEV_FLAGS"))
753 methods = atoi (getenv ("LIBEV_METHODS")); 1190 flags = atoi (getenv ("LIBEV_FLAGS"));
754 else
755 methods = EVMETHOD_ANY;
756 1191
757 method = 0; 1192 if (!(flags & 0x0000ffffU))
758#if EV_USE_WIN32 1193 flags |= ev_recommended_backends ();
759 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods); 1194
1195#if EV_USE_PORT
1196 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
760#endif 1197#endif
761#if EV_USE_KQUEUE 1198#if EV_USE_KQUEUE
762 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); 1199 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
763#endif 1200#endif
764#if EV_USE_EPOLL 1201#if EV_USE_EPOLL
765 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); 1202 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
766#endif 1203#endif
767#if EV_USE_POLL 1204#if EV_USE_POLL
768 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 1205 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
769#endif 1206#endif
770#if EV_USE_SELECT 1207#if EV_USE_SELECT
771 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 1208 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
772#endif 1209#endif
773 1210
774 ev_watcher_init (&sigev, sigcb); 1211 ev_init (&pipeev, pipecb);
775 ev_set_priority (&sigev, EV_MAXPRI); 1212 ev_set_priority (&pipeev, EV_MAXPRI);
776 } 1213 }
777} 1214}
778 1215
779void 1216static void noinline
780loop_destroy (EV_P) 1217loop_destroy (EV_P)
781{ 1218{
782 int i; 1219 int i;
783 1220
1221 if (ev_is_active (&pipeev))
1222 {
1223 ev_ref (EV_A); /* signal watcher */
1224 ev_io_stop (EV_A_ &pipeev);
1225
1226#if EV_USE_EVENTFD
1227 if (evfd >= 0)
1228 close (evfd);
1229#endif
1230
1231 if (evpipe [0] >= 0)
1232 {
1233 close (evpipe [0]);
1234 close (evpipe [1]);
1235 }
1236 }
1237
784#if EV_USE_WIN32 1238#if EV_USE_INOTIFY
785 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A); 1239 if (fs_fd >= 0)
1240 close (fs_fd);
1241#endif
1242
1243 if (backend_fd >= 0)
1244 close (backend_fd);
1245
1246#if EV_USE_PORT
1247 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
786#endif 1248#endif
787#if EV_USE_KQUEUE 1249#if EV_USE_KQUEUE
788 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1250 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
789#endif 1251#endif
790#if EV_USE_EPOLL 1252#if EV_USE_EPOLL
791 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1253 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
792#endif 1254#endif
793#if EV_USE_POLL 1255#if EV_USE_POLL
794 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1256 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
795#endif 1257#endif
796#if EV_USE_SELECT 1258#if EV_USE_SELECT
797 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1259 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
798#endif 1260#endif
799 1261
800 for (i = NUMPRI; i--; ) 1262 for (i = NUMPRI; i--; )
1263 {
801 array_free (pending, [i]); 1264 array_free (pending, [i]);
1265#if EV_IDLE_ENABLE
1266 array_free (idle, [i]);
1267#endif
1268 }
1269
1270 ev_free (anfds); anfdmax = 0;
802 1271
803 /* have to use the microsoft-never-gets-it-right macro */ 1272 /* have to use the microsoft-never-gets-it-right macro */
804 array_free_microshit (fdchange); 1273 array_free (fdchange, EMPTY);
805 array_free_microshit (timer); 1274 array_free (timer, EMPTY);
806 array_free_microshit (periodic); 1275#if EV_PERIODIC_ENABLE
807 array_free_microshit (idle); 1276 array_free (periodic, EMPTY);
808 array_free_microshit (prepare); 1277#endif
809 array_free_microshit (check); 1278#if EV_FORK_ENABLE
1279 array_free (fork, EMPTY);
1280#endif
1281 array_free (prepare, EMPTY);
1282 array_free (check, EMPTY);
1283#if EV_ASYNC_ENABLE
1284 array_free (async, EMPTY);
1285#endif
810 1286
811 method = 0; 1287 backend = 0;
812} 1288}
813 1289
814static void 1290#if EV_USE_INOTIFY
1291void inline_size infy_fork (EV_P);
1292#endif
1293
1294void inline_size
815loop_fork (EV_P) 1295loop_fork (EV_P)
816{ 1296{
1297#if EV_USE_PORT
1298 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1299#endif
1300#if EV_USE_KQUEUE
1301 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1302#endif
817#if EV_USE_EPOLL 1303#if EV_USE_EPOLL
818 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1304 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
819#endif 1305#endif
820#if EV_USE_KQUEUE 1306#if EV_USE_INOTIFY
821 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 1307 infy_fork (EV_A);
822#endif 1308#endif
823 1309
824 if (ev_is_active (&sigev)) 1310 if (ev_is_active (&pipeev))
825 { 1311 {
826 /* default loop */ 1312 /* this "locks" the handlers against writing to the pipe */
1313 /* while we modify the fd vars */
1314 gotsig = 1;
1315#if EV_ASYNC_ENABLE
1316 gotasync = 1;
1317#endif
827 1318
828 ev_ref (EV_A); 1319 ev_ref (EV_A);
829 ev_io_stop (EV_A_ &sigev); 1320 ev_io_stop (EV_A_ &pipeev);
1321
1322#if EV_USE_EVENTFD
1323 if (evfd >= 0)
1324 close (evfd);
1325#endif
1326
1327 if (evpipe [0] >= 0)
1328 {
830 close (sigpipe [0]); 1329 close (evpipe [0]);
831 close (sigpipe [1]); 1330 close (evpipe [1]);
1331 }
832 1332
833 while (ev_pipe (sigpipe))
834 syserr ("(libev) error creating pipe");
835
836 siginit (EV_A); 1333 evpipe_init (EV_A);
1334 /* now iterate over everything, in case we missed something */
1335 pipecb (EV_A_ &pipeev, EV_READ);
837 } 1336 }
838 1337
839 postfork = 0; 1338 postfork = 0;
840} 1339}
841 1340
842#if EV_MULTIPLICITY 1341#if EV_MULTIPLICITY
843struct ev_loop * 1342struct ev_loop *
844ev_loop_new (int methods) 1343ev_loop_new (unsigned int flags)
845{ 1344{
846 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 1345 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
847 1346
848 memset (loop, 0, sizeof (struct ev_loop)); 1347 memset (loop, 0, sizeof (struct ev_loop));
849 1348
850 loop_init (EV_A_ methods); 1349 loop_init (EV_A_ flags);
851 1350
852 if (ev_method (EV_A)) 1351 if (ev_backend (EV_A))
853 return loop; 1352 return loop;
854 1353
855 return 0; 1354 return 0;
856} 1355}
857 1356
… …
863} 1362}
864 1363
865void 1364void
866ev_loop_fork (EV_P) 1365ev_loop_fork (EV_P)
867{ 1366{
868 postfork = 1; 1367 postfork = 1; /* must be in line with ev_default_fork */
869} 1368}
870 1369
871#endif 1370#endif
872 1371
873#if EV_MULTIPLICITY 1372#if EV_MULTIPLICITY
874struct ev_loop default_loop_struct;
875static struct ev_loop *default_loop;
876
877struct ev_loop * 1373struct ev_loop *
1374ev_default_loop_init (unsigned int flags)
878#else 1375#else
879static int default_loop;
880
881int 1376int
1377ev_default_loop (unsigned int flags)
882#endif 1378#endif
883ev_default_loop (int methods)
884{ 1379{
885 if (sigpipe [0] == sigpipe [1])
886 if (ev_pipe (sigpipe))
887 return 0;
888
889 if (!default_loop) 1380 if (!ev_default_loop_ptr)
890 { 1381 {
891#if EV_MULTIPLICITY 1382#if EV_MULTIPLICITY
892 struct ev_loop *loop = default_loop = &default_loop_struct; 1383 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
893#else 1384#else
894 default_loop = 1; 1385 ev_default_loop_ptr = 1;
895#endif 1386#endif
896 1387
897 loop_init (EV_A_ methods); 1388 loop_init (EV_A_ flags);
898 1389
899 if (ev_method (EV_A)) 1390 if (ev_backend (EV_A))
900 { 1391 {
901 siginit (EV_A);
902
903#ifndef WIN32 1392#ifndef _WIN32
904 ev_signal_init (&childev, childcb, SIGCHLD); 1393 ev_signal_init (&childev, childcb, SIGCHLD);
905 ev_set_priority (&childev, EV_MAXPRI); 1394 ev_set_priority (&childev, EV_MAXPRI);
906 ev_signal_start (EV_A_ &childev); 1395 ev_signal_start (EV_A_ &childev);
907 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1396 ev_unref (EV_A); /* child watcher should not keep loop alive */
908#endif 1397#endif
909 } 1398 }
910 else 1399 else
911 default_loop = 0; 1400 ev_default_loop_ptr = 0;
912 } 1401 }
913 1402
914 return default_loop; 1403 return ev_default_loop_ptr;
915} 1404}
916 1405
917void 1406void
918ev_default_destroy (void) 1407ev_default_destroy (void)
919{ 1408{
920#if EV_MULTIPLICITY 1409#if EV_MULTIPLICITY
921 struct ev_loop *loop = default_loop; 1410 struct ev_loop *loop = ev_default_loop_ptr;
922#endif 1411#endif
923 1412
924#ifndef WIN32 1413#ifndef _WIN32
925 ev_ref (EV_A); /* child watcher */ 1414 ev_ref (EV_A); /* child watcher */
926 ev_signal_stop (EV_A_ &childev); 1415 ev_signal_stop (EV_A_ &childev);
927#endif 1416#endif
928 1417
929 ev_ref (EV_A); /* signal watcher */
930 ev_io_stop (EV_A_ &sigev);
931
932 close (sigpipe [0]); sigpipe [0] = 0;
933 close (sigpipe [1]); sigpipe [1] = 0;
934
935 loop_destroy (EV_A); 1418 loop_destroy (EV_A);
936} 1419}
937 1420
938void 1421void
939ev_default_fork (void) 1422ev_default_fork (void)
940{ 1423{
941#if EV_MULTIPLICITY 1424#if EV_MULTIPLICITY
942 struct ev_loop *loop = default_loop; 1425 struct ev_loop *loop = ev_default_loop_ptr;
943#endif 1426#endif
944 1427
945 if (method) 1428 if (backend)
946 postfork = 1; 1429 postfork = 1; /* must be in line with ev_loop_fork */
947} 1430}
948 1431
949/*****************************************************************************/ 1432/*****************************************************************************/
950 1433
951static void 1434void
1435ev_invoke (EV_P_ void *w, int revents)
1436{
1437 EV_CB_INVOKE ((W)w, revents);
1438}
1439
1440void inline_speed
952call_pending (EV_P) 1441call_pending (EV_P)
953{ 1442{
954 int pri; 1443 int pri;
955 1444
956 for (pri = NUMPRI; pri--; ) 1445 for (pri = NUMPRI; pri--; )
957 while (pendingcnt [pri]) 1446 while (pendingcnt [pri])
958 { 1447 {
959 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1448 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
960 1449
961 if (p->w) 1450 if (expect_true (p->w))
962 { 1451 {
1452 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1453
963 p->w->pending = 0; 1454 p->w->pending = 0;
964 p->w->cb (EV_A_ p->w, p->events); 1455 EV_CB_INVOKE (p->w, p->events);
965 } 1456 }
966 } 1457 }
967} 1458}
968 1459
969static void 1460void inline_size
970timers_reify (EV_P) 1461timers_reify (EV_P)
971{ 1462{
972 while (timercnt && ((WT)timers [0])->at <= mn_now) 1463 while (timercnt && ((WT)timers [0])->at <= mn_now)
973 { 1464 {
974 struct ev_timer *w = timers [0]; 1465 ev_timer *w = (ev_timer *)timers [0];
975 1466
976 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1467 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
977 1468
978 /* first reschedule or stop timer */ 1469 /* first reschedule or stop timer */
979 if (w->repeat) 1470 if (w->repeat)
980 { 1471 {
981 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1472 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1473
982 ((WT)w)->at = mn_now + w->repeat; 1474 ((WT)w)->at += w->repeat;
1475 if (((WT)w)->at < mn_now)
1476 ((WT)w)->at = mn_now;
1477
983 downheap ((WT *)timers, timercnt, 0); 1478 downheap (timers, timercnt, 0);
984 } 1479 }
985 else 1480 else
986 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1481 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
987 1482
988 event (EV_A_ (W)w, EV_TIMEOUT); 1483 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
989 } 1484 }
990} 1485}
991 1486
992static void 1487#if EV_PERIODIC_ENABLE
1488void inline_size
993periodics_reify (EV_P) 1489periodics_reify (EV_P)
994{ 1490{
995 while (periodiccnt && ((WT)periodics [0])->at <= rt_now) 1491 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
996 { 1492 {
997 struct ev_periodic *w = periodics [0]; 1493 ev_periodic *w = (ev_periodic *)periodics [0];
998 1494
999 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1495 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1000 1496
1001 /* first reschedule or stop timer */ 1497 /* first reschedule or stop timer */
1002 if (w->interval) 1498 if (w->reschedule_cb)
1003 { 1499 {
1500 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1501 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1502 downheap (periodics, periodiccnt, 0);
1503 }
1504 else if (w->interval)
1505 {
1004 ((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; 1506 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1507 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1005 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now)); 1508 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1006 downheap ((WT *)periodics, periodiccnt, 0); 1509 downheap (periodics, periodiccnt, 0);
1007 } 1510 }
1008 else 1511 else
1009 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1512 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1010 1513
1011 event (EV_A_ (W)w, EV_PERIODIC); 1514 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1012 } 1515 }
1013} 1516}
1014 1517
1015static void 1518static void noinline
1016periodics_reschedule (EV_P) 1519periodics_reschedule (EV_P)
1017{ 1520{
1018 int i; 1521 int i;
1019 1522
1020 /* adjust periodics after time jump */ 1523 /* adjust periodics after time jump */
1021 for (i = 0; i < periodiccnt; ++i) 1524 for (i = 0; i < periodiccnt; ++i)
1022 { 1525 {
1023 struct ev_periodic *w = periodics [i]; 1526 ev_periodic *w = (ev_periodic *)periodics [i];
1024 1527
1528 if (w->reschedule_cb)
1529 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1025 if (w->interval) 1530 else if (w->interval)
1531 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1532 }
1533
1534 /* now rebuild the heap */
1535 for (i = periodiccnt >> 1; i--; )
1536 downheap (periodics, periodiccnt, i);
1537}
1538#endif
1539
1540#if EV_IDLE_ENABLE
1541void inline_size
1542idle_reify (EV_P)
1543{
1544 if (expect_false (idleall))
1545 {
1546 int pri;
1547
1548 for (pri = NUMPRI; pri--; )
1026 { 1549 {
1027 ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; 1550 if (pendingcnt [pri])
1551 break;
1028 1552
1029 if (fabs (diff) >= 1e-4) 1553 if (idlecnt [pri])
1030 { 1554 {
1031 ev_periodic_stop (EV_A_ w); 1555 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1032 ev_periodic_start (EV_A_ w); 1556 break;
1033
1034 i = 0; /* restart loop, inefficient, but time jumps should be rare */
1035 } 1557 }
1036 } 1558 }
1037 } 1559 }
1038} 1560}
1561#endif
1039 1562
1040inline int 1563void inline_speed
1041time_update_monotonic (EV_P) 1564time_update (EV_P_ ev_tstamp max_block)
1042{
1043 mn_now = get_clock ();
1044
1045 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1046 {
1047 rt_now = rtmn_diff + mn_now;
1048 return 0;
1049 }
1050 else
1051 {
1052 now_floor = mn_now;
1053 rt_now = ev_time ();
1054 return 1;
1055 }
1056}
1057
1058static void
1059time_update (EV_P)
1060{ 1565{
1061 int i; 1566 int i;
1062 1567
1063#if EV_USE_MONOTONIC 1568#if EV_USE_MONOTONIC
1064 if (expect_true (have_monotonic)) 1569 if (expect_true (have_monotonic))
1065 { 1570 {
1066 if (time_update_monotonic (EV_A)) 1571 ev_tstamp odiff = rtmn_diff;
1572
1573 mn_now = get_clock ();
1574
1575 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1576 /* interpolate in the meantime */
1577 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1067 { 1578 {
1068 ev_tstamp odiff = rtmn_diff; 1579 ev_rt_now = rtmn_diff + mn_now;
1580 return;
1581 }
1069 1582
1583 now_floor = mn_now;
1584 ev_rt_now = ev_time ();
1585
1070 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1586 /* loop a few times, before making important decisions.
1587 * on the choice of "4": one iteration isn't enough,
1588 * in case we get preempted during the calls to
1589 * ev_time and get_clock. a second call is almost guaranteed
1590 * to succeed in that case, though. and looping a few more times
1591 * doesn't hurt either as we only do this on time-jumps or
1592 * in the unlikely event of having been preempted here.
1593 */
1594 for (i = 4; --i; )
1071 { 1595 {
1072 rtmn_diff = rt_now - mn_now; 1596 rtmn_diff = ev_rt_now - mn_now;
1073 1597
1074 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1598 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
1075 return; /* all is well */ 1599 return; /* all is well */
1076 1600
1077 rt_now = ev_time (); 1601 ev_rt_now = ev_time ();
1078 mn_now = get_clock (); 1602 mn_now = get_clock ();
1079 now_floor = mn_now; 1603 now_floor = mn_now;
1080 } 1604 }
1081 1605
1606# if EV_PERIODIC_ENABLE
1607 periodics_reschedule (EV_A);
1608# endif
1609 /* no timer adjustment, as the monotonic clock doesn't jump */
1610 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1611 }
1612 else
1613#endif
1614 {
1615 ev_rt_now = ev_time ();
1616
1617 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1618 {
1619#if EV_PERIODIC_ENABLE
1082 periodics_reschedule (EV_A); 1620 periodics_reschedule (EV_A);
1083 /* no timer adjustment, as the monotonic clock doesn't jump */ 1621#endif
1084 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */ 1622 /* adjust timers. this is easy, as the offset is the same for all of them */
1623 for (i = 0; i < timercnt; ++i)
1624 ((WT)timers [i])->at += ev_rt_now - mn_now;
1085 } 1625 }
1086 }
1087 else
1088#endif
1089 {
1090 rt_now = ev_time ();
1091 1626
1092 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1093 {
1094 periodics_reschedule (EV_A);
1095
1096 /* adjust timers. this is easy, as the offset is the same for all */
1097 for (i = 0; i < timercnt; ++i)
1098 ((WT)timers [i])->at += rt_now - mn_now;
1099 }
1100
1101 mn_now = rt_now; 1627 mn_now = ev_rt_now;
1102 } 1628 }
1103} 1629}
1104 1630
1105void 1631void
1106ev_ref (EV_P) 1632ev_ref (EV_P)
… …
1117static int loop_done; 1643static int loop_done;
1118 1644
1119void 1645void
1120ev_loop (EV_P_ int flags) 1646ev_loop (EV_P_ int flags)
1121{ 1647{
1122 double block; 1648 loop_done = EVUNLOOP_CANCEL;
1123 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1649
1650 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1124 1651
1125 do 1652 do
1126 { 1653 {
1654#ifndef _WIN32
1655 if (expect_false (curpid)) /* penalise the forking check even more */
1656 if (expect_false (getpid () != curpid))
1657 {
1658 curpid = getpid ();
1659 postfork = 1;
1660 }
1661#endif
1662
1663#if EV_FORK_ENABLE
1664 /* we might have forked, so queue fork handlers */
1665 if (expect_false (postfork))
1666 if (forkcnt)
1667 {
1668 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1669 call_pending (EV_A);
1670 }
1671#endif
1672
1127 /* queue check watchers (and execute them) */ 1673 /* queue prepare watchers (and execute them) */
1128 if (expect_false (preparecnt)) 1674 if (expect_false (preparecnt))
1129 { 1675 {
1130 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1676 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1131 call_pending (EV_A); 1677 call_pending (EV_A);
1132 } 1678 }
1133 1679
1680 if (expect_false (!activecnt))
1681 break;
1682
1134 /* we might have forked, so reify kernel state if necessary */ 1683 /* we might have forked, so reify kernel state if necessary */
1135 if (expect_false (postfork)) 1684 if (expect_false (postfork))
1136 loop_fork (EV_A); 1685 loop_fork (EV_A);
1137 1686
1138 /* update fd-related kernel structures */ 1687 /* update fd-related kernel structures */
1139 fd_reify (EV_A); 1688 fd_reify (EV_A);
1140 1689
1141 /* calculate blocking time */ 1690 /* calculate blocking time */
1691 {
1692 ev_tstamp waittime = 0.;
1693 ev_tstamp sleeptime = 0.;
1142 1694
1143 /* we only need this for !monotonic clockor timers, but as we basically 1695 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1144 always have timers, we just calculate it always */
1145#if EV_USE_MONOTONIC
1146 if (expect_true (have_monotonic))
1147 time_update_monotonic (EV_A);
1148 else
1149#endif
1150 { 1696 {
1151 rt_now = ev_time (); 1697 /* update time to cancel out callback processing overhead */
1152 mn_now = rt_now; 1698 time_update (EV_A_ 1e100);
1153 }
1154 1699
1155 if (flags & EVLOOP_NONBLOCK || idlecnt)
1156 block = 0.;
1157 else
1158 {
1159 block = MAX_BLOCKTIME; 1700 waittime = MAX_BLOCKTIME;
1160 1701
1161 if (timercnt) 1702 if (timercnt)
1162 { 1703 {
1163 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 1704 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
1164 if (block > to) block = to; 1705 if (waittime > to) waittime = to;
1165 } 1706 }
1166 1707
1708#if EV_PERIODIC_ENABLE
1167 if (periodiccnt) 1709 if (periodiccnt)
1168 { 1710 {
1169 ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge; 1711 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
1170 if (block > to) block = to; 1712 if (waittime > to) waittime = to;
1171 } 1713 }
1714#endif
1172 1715
1173 if (block < 0.) block = 0.; 1716 if (expect_false (waittime < timeout_blocktime))
1717 waittime = timeout_blocktime;
1718
1719 sleeptime = waittime - backend_fudge;
1720
1721 if (expect_true (sleeptime > io_blocktime))
1722 sleeptime = io_blocktime;
1723
1724 if (sleeptime)
1725 {
1726 ev_sleep (sleeptime);
1727 waittime -= sleeptime;
1728 }
1174 } 1729 }
1175 1730
1176 method_poll (EV_A_ block); 1731 ++loop_count;
1732 backend_poll (EV_A_ waittime);
1177 1733
1178 /* update rt_now, do magic */ 1734 /* update ev_rt_now, do magic */
1179 time_update (EV_A); 1735 time_update (EV_A_ waittime + sleeptime);
1736 }
1180 1737
1181 /* queue pending timers and reschedule them */ 1738 /* queue pending timers and reschedule them */
1182 timers_reify (EV_A); /* relative timers called last */ 1739 timers_reify (EV_A); /* relative timers called last */
1740#if EV_PERIODIC_ENABLE
1183 periodics_reify (EV_A); /* absolute timers called first */ 1741 periodics_reify (EV_A); /* absolute timers called first */
1742#endif
1184 1743
1744#if EV_IDLE_ENABLE
1185 /* queue idle watchers unless io or timers are pending */ 1745 /* queue idle watchers unless other events are pending */
1186 if (!pendingcnt) 1746 idle_reify (EV_A);
1187 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 1747#endif
1188 1748
1189 /* queue check watchers, to be executed first */ 1749 /* queue check watchers, to be executed first */
1190 if (checkcnt) 1750 if (expect_false (checkcnt))
1191 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 1751 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1192 1752
1193 call_pending (EV_A); 1753 call_pending (EV_A);
1194 } 1754 }
1195 while (activecnt && !loop_done); 1755 while (expect_true (
1756 activecnt
1757 && !loop_done
1758 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1759 ));
1196 1760
1197 if (loop_done != 2) 1761 if (loop_done == EVUNLOOP_ONE)
1198 loop_done = 0; 1762 loop_done = EVUNLOOP_CANCEL;
1199} 1763}
1200 1764
1201void 1765void
1202ev_unloop (EV_P_ int how) 1766ev_unloop (EV_P_ int how)
1203{ 1767{
1204 loop_done = how; 1768 loop_done = how;
1205} 1769}
1206 1770
1207/*****************************************************************************/ 1771/*****************************************************************************/
1208 1772
1209inline void 1773void inline_size
1210wlist_add (WL *head, WL elem) 1774wlist_add (WL *head, WL elem)
1211{ 1775{
1212 elem->next = *head; 1776 elem->next = *head;
1213 *head = elem; 1777 *head = elem;
1214} 1778}
1215 1779
1216inline void 1780void inline_size
1217wlist_del (WL *head, WL elem) 1781wlist_del (WL *head, WL elem)
1218{ 1782{
1219 while (*head) 1783 while (*head)
1220 { 1784 {
1221 if (*head == elem) 1785 if (*head == elem)
… …
1226 1790
1227 head = &(*head)->next; 1791 head = &(*head)->next;
1228 } 1792 }
1229} 1793}
1230 1794
1231inline void 1795void inline_speed
1232ev_clear_pending (EV_P_ W w) 1796clear_pending (EV_P_ W w)
1233{ 1797{
1234 if (w->pending) 1798 if (w->pending)
1235 { 1799 {
1236 pendings [ABSPRI (w)][w->pending - 1].w = 0; 1800 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1237 w->pending = 0; 1801 w->pending = 0;
1238 } 1802 }
1239} 1803}
1240 1804
1241inline void 1805int
1806ev_clear_pending (EV_P_ void *w)
1807{
1808 W w_ = (W)w;
1809 int pending = w_->pending;
1810
1811 if (expect_true (pending))
1812 {
1813 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1814 w_->pending = 0;
1815 p->w = 0;
1816 return p->events;
1817 }
1818 else
1819 return 0;
1820}
1821
1822void inline_size
1823pri_adjust (EV_P_ W w)
1824{
1825 int pri = w->priority;
1826 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1827 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1828 w->priority = pri;
1829}
1830
1831void inline_speed
1242ev_start (EV_P_ W w, int active) 1832ev_start (EV_P_ W w, int active)
1243{ 1833{
1244 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 1834 pri_adjust (EV_A_ w);
1245 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1246
1247 w->active = active; 1835 w->active = active;
1248 ev_ref (EV_A); 1836 ev_ref (EV_A);
1249} 1837}
1250 1838
1251inline void 1839void inline_size
1252ev_stop (EV_P_ W w) 1840ev_stop (EV_P_ W w)
1253{ 1841{
1254 ev_unref (EV_A); 1842 ev_unref (EV_A);
1255 w->active = 0; 1843 w->active = 0;
1256} 1844}
1257 1845
1258/*****************************************************************************/ 1846/*****************************************************************************/
1259 1847
1260void 1848void noinline
1261ev_io_start (EV_P_ struct ev_io *w) 1849ev_io_start (EV_P_ ev_io *w)
1262{ 1850{
1263 int fd = w->fd; 1851 int fd = w->fd;
1264 1852
1265 if (ev_is_active (w)) 1853 if (expect_false (ev_is_active (w)))
1266 return; 1854 return;
1267 1855
1268 assert (("ev_io_start called with negative fd", fd >= 0)); 1856 assert (("ev_io_start called with negative fd", fd >= 0));
1269 1857
1270 ev_start (EV_A_ (W)w, 1); 1858 ev_start (EV_A_ (W)w, 1);
1271 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1859 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1272 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1860 wlist_add (&anfds[fd].head, (WL)w);
1273 1861
1274 fd_change (EV_A_ fd); 1862 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1863 w->events &= ~EV_IOFDSET;
1275} 1864}
1276 1865
1277void 1866void noinline
1278ev_io_stop (EV_P_ struct ev_io *w) 1867ev_io_stop (EV_P_ ev_io *w)
1279{ 1868{
1280 ev_clear_pending (EV_A_ (W)w); 1869 clear_pending (EV_A_ (W)w);
1281 if (!ev_is_active (w)) 1870 if (expect_false (!ev_is_active (w)))
1282 return; 1871 return;
1283 1872
1873 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1874
1284 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1875 wlist_del (&anfds[w->fd].head, (WL)w);
1285 ev_stop (EV_A_ (W)w); 1876 ev_stop (EV_A_ (W)w);
1286 1877
1287 fd_change (EV_A_ w->fd); 1878 fd_change (EV_A_ w->fd, 1);
1288} 1879}
1289 1880
1290void 1881void noinline
1291ev_timer_start (EV_P_ struct ev_timer *w) 1882ev_timer_start (EV_P_ ev_timer *w)
1292{ 1883{
1293 if (ev_is_active (w)) 1884 if (expect_false (ev_is_active (w)))
1294 return; 1885 return;
1295 1886
1296 ((WT)w)->at += mn_now; 1887 ((WT)w)->at += mn_now;
1297 1888
1298 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 1889 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1299 1890
1300 ev_start (EV_A_ (W)w, ++timercnt); 1891 ev_start (EV_A_ (W)w, ++timercnt);
1301 array_needsize (timers, timermax, timercnt, (void)); 1892 array_needsize (WT, timers, timermax, timercnt, EMPTY2);
1302 timers [timercnt - 1] = w; 1893 timers [timercnt - 1] = (WT)w;
1303 upheap ((WT *)timers, timercnt - 1); 1894 upheap (timers, timercnt - 1);
1304 1895
1305 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 1896 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
1306} 1897}
1307 1898
1308void 1899void noinline
1309ev_timer_stop (EV_P_ struct ev_timer *w) 1900ev_timer_stop (EV_P_ ev_timer *w)
1310{ 1901{
1311 ev_clear_pending (EV_A_ (W)w); 1902 clear_pending (EV_A_ (W)w);
1312 if (!ev_is_active (w)) 1903 if (expect_false (!ev_is_active (w)))
1313 return; 1904 return;
1314 1905
1315 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 1906 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
1316 1907
1317 if (((W)w)->active < timercnt--) 1908 {
1909 int active = ((W)w)->active;
1910
1911 if (expect_true (--active < --timercnt))
1318 { 1912 {
1319 timers [((W)w)->active - 1] = timers [timercnt]; 1913 timers [active] = timers [timercnt];
1320 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 1914 adjustheap (timers, timercnt, active);
1321 } 1915 }
1916 }
1322 1917
1323 ((WT)w)->at = w->repeat; 1918 ((WT)w)->at -= mn_now;
1324 1919
1325 ev_stop (EV_A_ (W)w); 1920 ev_stop (EV_A_ (W)w);
1326} 1921}
1327 1922
1328void 1923void noinline
1329ev_timer_again (EV_P_ struct ev_timer *w) 1924ev_timer_again (EV_P_ ev_timer *w)
1330{ 1925{
1331 if (ev_is_active (w)) 1926 if (ev_is_active (w))
1332 { 1927 {
1333 if (w->repeat) 1928 if (w->repeat)
1334 { 1929 {
1335 ((WT)w)->at = mn_now + w->repeat; 1930 ((WT)w)->at = mn_now + w->repeat;
1336 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 1931 adjustheap (timers, timercnt, ((W)w)->active - 1);
1337 } 1932 }
1338 else 1933 else
1339 ev_timer_stop (EV_A_ w); 1934 ev_timer_stop (EV_A_ w);
1340 } 1935 }
1341 else if (w->repeat) 1936 else if (w->repeat)
1937 {
1938 w->at = w->repeat;
1342 ev_timer_start (EV_A_ w); 1939 ev_timer_start (EV_A_ w);
1940 }
1343} 1941}
1344 1942
1345void 1943#if EV_PERIODIC_ENABLE
1944void noinline
1346ev_periodic_start (EV_P_ struct ev_periodic *w) 1945ev_periodic_start (EV_P_ ev_periodic *w)
1347{ 1946{
1348 if (ev_is_active (w)) 1947 if (expect_false (ev_is_active (w)))
1349 return; 1948 return;
1350 1949
1950 if (w->reschedule_cb)
1951 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1952 else if (w->interval)
1953 {
1351 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 1954 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1352
1353 /* this formula differs from the one in periodic_reify because we do not always round up */ 1955 /* this formula differs from the one in periodic_reify because we do not always round up */
1354 if (w->interval)
1355 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; 1956 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1957 }
1958 else
1959 ((WT)w)->at = w->offset;
1356 1960
1357 ev_start (EV_A_ (W)w, ++periodiccnt); 1961 ev_start (EV_A_ (W)w, ++periodiccnt);
1358 array_needsize (periodics, periodicmax, periodiccnt, (void)); 1962 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
1359 periodics [periodiccnt - 1] = w; 1963 periodics [periodiccnt - 1] = (WT)w;
1360 upheap ((WT *)periodics, periodiccnt - 1); 1964 upheap (periodics, periodiccnt - 1);
1361 1965
1362 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 1966 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
1363} 1967}
1364 1968
1365void 1969void noinline
1366ev_periodic_stop (EV_P_ struct ev_periodic *w) 1970ev_periodic_stop (EV_P_ ev_periodic *w)
1367{ 1971{
1368 ev_clear_pending (EV_A_ (W)w); 1972 clear_pending (EV_A_ (W)w);
1369 if (!ev_is_active (w)) 1973 if (expect_false (!ev_is_active (w)))
1370 return; 1974 return;
1371 1975
1372 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 1976 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
1373 1977
1374 if (((W)w)->active < periodiccnt--) 1978 {
1979 int active = ((W)w)->active;
1980
1981 if (expect_true (--active < --periodiccnt))
1375 { 1982 {
1376 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 1983 periodics [active] = periodics [periodiccnt];
1377 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 1984 adjustheap (periodics, periodiccnt, active);
1378 } 1985 }
1986 }
1379 1987
1380 ev_stop (EV_A_ (W)w); 1988 ev_stop (EV_A_ (W)w);
1381} 1989}
1382 1990
1383void 1991void noinline
1384ev_idle_start (EV_P_ struct ev_idle *w) 1992ev_periodic_again (EV_P_ ev_periodic *w)
1385{ 1993{
1386 if (ev_is_active (w)) 1994 /* TODO: use adjustheap and recalculation */
1387 return;
1388
1389 ev_start (EV_A_ (W)w, ++idlecnt);
1390 array_needsize (idles, idlemax, idlecnt, (void));
1391 idles [idlecnt - 1] = w;
1392}
1393
1394void
1395ev_idle_stop (EV_P_ struct ev_idle *w)
1396{
1397 ev_clear_pending (EV_A_ (W)w);
1398 if (ev_is_active (w))
1399 return;
1400
1401 idles [((W)w)->active - 1] = idles [--idlecnt];
1402 ev_stop (EV_A_ (W)w); 1995 ev_periodic_stop (EV_A_ w);
1996 ev_periodic_start (EV_A_ w);
1403} 1997}
1404 1998#endif
1405void
1406ev_prepare_start (EV_P_ struct ev_prepare *w)
1407{
1408 if (ev_is_active (w))
1409 return;
1410
1411 ev_start (EV_A_ (W)w, ++preparecnt);
1412 array_needsize (prepares, preparemax, preparecnt, (void));
1413 prepares [preparecnt - 1] = w;
1414}
1415
1416void
1417ev_prepare_stop (EV_P_ struct ev_prepare *w)
1418{
1419 ev_clear_pending (EV_A_ (W)w);
1420 if (ev_is_active (w))
1421 return;
1422
1423 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1424 ev_stop (EV_A_ (W)w);
1425}
1426
1427void
1428ev_check_start (EV_P_ struct ev_check *w)
1429{
1430 if (ev_is_active (w))
1431 return;
1432
1433 ev_start (EV_A_ (W)w, ++checkcnt);
1434 array_needsize (checks, checkmax, checkcnt, (void));
1435 checks [checkcnt - 1] = w;
1436}
1437
1438void
1439ev_check_stop (EV_P_ struct ev_check *w)
1440{
1441 ev_clear_pending (EV_A_ (W)w);
1442 if (ev_is_active (w))
1443 return;
1444
1445 checks [((W)w)->active - 1] = checks [--checkcnt];
1446 ev_stop (EV_A_ (W)w);
1447}
1448 1999
1449#ifndef SA_RESTART 2000#ifndef SA_RESTART
1450# define SA_RESTART 0 2001# define SA_RESTART 0
1451#endif 2002#endif
1452 2003
1453void 2004void noinline
1454ev_signal_start (EV_P_ struct ev_signal *w) 2005ev_signal_start (EV_P_ ev_signal *w)
1455{ 2006{
1456#if EV_MULTIPLICITY 2007#if EV_MULTIPLICITY
1457 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2008 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1458#endif 2009#endif
1459 if (ev_is_active (w)) 2010 if (expect_false (ev_is_active (w)))
1460 return; 2011 return;
1461 2012
1462 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2013 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1463 2014
2015 evpipe_init (EV_A);
2016
2017 {
2018#ifndef _WIN32
2019 sigset_t full, prev;
2020 sigfillset (&full);
2021 sigprocmask (SIG_SETMASK, &full, &prev);
2022#endif
2023
2024 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2025
2026#ifndef _WIN32
2027 sigprocmask (SIG_SETMASK, &prev, 0);
2028#endif
2029 }
2030
1464 ev_start (EV_A_ (W)w, 1); 2031 ev_start (EV_A_ (W)w, 1);
1465 array_needsize (signals, signalmax, w->signum, signals_init);
1466 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2032 wlist_add (&signals [w->signum - 1].head, (WL)w);
1467 2033
1468 if (!((WL)w)->next) 2034 if (!((WL)w)->next)
1469 { 2035 {
1470#if WIN32 2036#if _WIN32
1471 signal (w->signum, sighandler); 2037 signal (w->signum, ev_sighandler);
1472#else 2038#else
1473 struct sigaction sa; 2039 struct sigaction sa;
1474 sa.sa_handler = sighandler; 2040 sa.sa_handler = ev_sighandler;
1475 sigfillset (&sa.sa_mask); 2041 sigfillset (&sa.sa_mask);
1476 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2042 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1477 sigaction (w->signum, &sa, 0); 2043 sigaction (w->signum, &sa, 0);
1478#endif 2044#endif
1479 } 2045 }
1480} 2046}
1481 2047
1482void 2048void noinline
1483ev_signal_stop (EV_P_ struct ev_signal *w) 2049ev_signal_stop (EV_P_ ev_signal *w)
1484{ 2050{
1485 ev_clear_pending (EV_A_ (W)w); 2051 clear_pending (EV_A_ (W)w);
1486 if (!ev_is_active (w)) 2052 if (expect_false (!ev_is_active (w)))
1487 return; 2053 return;
1488 2054
1489 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2055 wlist_del (&signals [w->signum - 1].head, (WL)w);
1490 ev_stop (EV_A_ (W)w); 2056 ev_stop (EV_A_ (W)w);
1491 2057
1492 if (!signals [w->signum - 1].head) 2058 if (!signals [w->signum - 1].head)
1493 signal (w->signum, SIG_DFL); 2059 signal (w->signum, SIG_DFL);
1494} 2060}
1495 2061
1496void 2062void
1497ev_child_start (EV_P_ struct ev_child *w) 2063ev_child_start (EV_P_ ev_child *w)
1498{ 2064{
1499#if EV_MULTIPLICITY 2065#if EV_MULTIPLICITY
1500 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2066 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1501#endif 2067#endif
1502 if (ev_is_active (w)) 2068 if (expect_false (ev_is_active (w)))
1503 return; 2069 return;
1504 2070
1505 ev_start (EV_A_ (W)w, 1); 2071 ev_start (EV_A_ (W)w, 1);
1506 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2072 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1507} 2073}
1508 2074
1509void 2075void
1510ev_child_stop (EV_P_ struct ev_child *w) 2076ev_child_stop (EV_P_ ev_child *w)
1511{ 2077{
1512 ev_clear_pending (EV_A_ (W)w); 2078 clear_pending (EV_A_ (W)w);
1513 if (ev_is_active (w)) 2079 if (expect_false (!ev_is_active (w)))
1514 return; 2080 return;
1515 2081
1516 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2082 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1517 ev_stop (EV_A_ (W)w); 2083 ev_stop (EV_A_ (W)w);
1518} 2084}
1519 2085
2086#if EV_STAT_ENABLE
2087
2088# ifdef _WIN32
2089# undef lstat
2090# define lstat(a,b) _stati64 (a,b)
2091# endif
2092
2093#define DEF_STAT_INTERVAL 5.0074891
2094#define MIN_STAT_INTERVAL 0.1074891
2095
2096static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2097
2098#if EV_USE_INOTIFY
2099# define EV_INOTIFY_BUFSIZE 8192
2100
2101static void noinline
2102infy_add (EV_P_ ev_stat *w)
2103{
2104 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);
2105
2106 if (w->wd < 0)
2107 {
2108 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2109
2110 /* monitor some parent directory for speedup hints */
2111 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2112 {
2113 char path [4096];
2114 strcpy (path, w->path);
2115
2116 do
2117 {
2118 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2119 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2120
2121 char *pend = strrchr (path, '/');
2122
2123 if (!pend)
2124 break; /* whoops, no '/', complain to your admin */
2125
2126 *pend = 0;
2127 w->wd = inotify_add_watch (fs_fd, path, mask);
2128 }
2129 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2130 }
2131 }
2132 else
2133 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2134
2135 if (w->wd >= 0)
2136 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2137}
2138
2139static void noinline
2140infy_del (EV_P_ ev_stat *w)
2141{
2142 int slot;
2143 int wd = w->wd;
2144
2145 if (wd < 0)
2146 return;
2147
2148 w->wd = -2;
2149 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2150 wlist_del (&fs_hash [slot].head, (WL)w);
2151
2152 /* remove this watcher, if others are watching it, they will rearm */
2153 inotify_rm_watch (fs_fd, wd);
2154}
2155
2156static void noinline
2157infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2158{
2159 if (slot < 0)
2160 /* overflow, need to check for all hahs slots */
2161 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2162 infy_wd (EV_A_ slot, wd, ev);
2163 else
2164 {
2165 WL w_;
2166
2167 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2168 {
2169 ev_stat *w = (ev_stat *)w_;
2170 w_ = w_->next; /* lets us remove this watcher and all before it */
2171
2172 if (w->wd == wd || wd == -1)
2173 {
2174 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2175 {
2176 w->wd = -1;
2177 infy_add (EV_A_ w); /* re-add, no matter what */
2178 }
2179
2180 stat_timer_cb (EV_A_ &w->timer, 0);
2181 }
2182 }
2183 }
2184}
2185
2186static void
2187infy_cb (EV_P_ ev_io *w, int revents)
2188{
2189 char buf [EV_INOTIFY_BUFSIZE];
2190 struct inotify_event *ev = (struct inotify_event *)buf;
2191 int ofs;
2192 int len = read (fs_fd, buf, sizeof (buf));
2193
2194 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2195 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2196}
2197
2198void inline_size
2199infy_init (EV_P)
2200{
2201 if (fs_fd != -2)
2202 return;
2203
2204 fs_fd = inotify_init ();
2205
2206 if (fs_fd >= 0)
2207 {
2208 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2209 ev_set_priority (&fs_w, EV_MAXPRI);
2210 ev_io_start (EV_A_ &fs_w);
2211 }
2212}
2213
2214void inline_size
2215infy_fork (EV_P)
2216{
2217 int slot;
2218
2219 if (fs_fd < 0)
2220 return;
2221
2222 close (fs_fd);
2223 fs_fd = inotify_init ();
2224
2225 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2226 {
2227 WL w_ = fs_hash [slot].head;
2228 fs_hash [slot].head = 0;
2229
2230 while (w_)
2231 {
2232 ev_stat *w = (ev_stat *)w_;
2233 w_ = w_->next; /* lets us add this watcher */
2234
2235 w->wd = -1;
2236
2237 if (fs_fd >= 0)
2238 infy_add (EV_A_ w); /* re-add, no matter what */
2239 else
2240 ev_timer_start (EV_A_ &w->timer);
2241 }
2242
2243 }
2244}
2245
2246#endif
2247
2248void
2249ev_stat_stat (EV_P_ ev_stat *w)
2250{
2251 if (lstat (w->path, &w->attr) < 0)
2252 w->attr.st_nlink = 0;
2253 else if (!w->attr.st_nlink)
2254 w->attr.st_nlink = 1;
2255}
2256
2257static void noinline
2258stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2259{
2260 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2261
2262 /* we copy this here each the time so that */
2263 /* prev has the old value when the callback gets invoked */
2264 w->prev = w->attr;
2265 ev_stat_stat (EV_A_ w);
2266
2267 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2268 if (
2269 w->prev.st_dev != w->attr.st_dev
2270 || w->prev.st_ino != w->attr.st_ino
2271 || w->prev.st_mode != w->attr.st_mode
2272 || w->prev.st_nlink != w->attr.st_nlink
2273 || w->prev.st_uid != w->attr.st_uid
2274 || w->prev.st_gid != w->attr.st_gid
2275 || w->prev.st_rdev != w->attr.st_rdev
2276 || w->prev.st_size != w->attr.st_size
2277 || w->prev.st_atime != w->attr.st_atime
2278 || w->prev.st_mtime != w->attr.st_mtime
2279 || w->prev.st_ctime != w->attr.st_ctime
2280 ) {
2281 #if EV_USE_INOTIFY
2282 infy_del (EV_A_ w);
2283 infy_add (EV_A_ w);
2284 ev_stat_stat (EV_A_ w); /* avoid race... */
2285 #endif
2286
2287 ev_feed_event (EV_A_ w, EV_STAT);
2288 }
2289}
2290
2291void
2292ev_stat_start (EV_P_ ev_stat *w)
2293{
2294 if (expect_false (ev_is_active (w)))
2295 return;
2296
2297 /* since we use memcmp, we need to clear any padding data etc. */
2298 memset (&w->prev, 0, sizeof (ev_statdata));
2299 memset (&w->attr, 0, sizeof (ev_statdata));
2300
2301 ev_stat_stat (EV_A_ w);
2302
2303 if (w->interval < MIN_STAT_INTERVAL)
2304 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2305
2306 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2307 ev_set_priority (&w->timer, ev_priority (w));
2308
2309#if EV_USE_INOTIFY
2310 infy_init (EV_A);
2311
2312 if (fs_fd >= 0)
2313 infy_add (EV_A_ w);
2314 else
2315#endif
2316 ev_timer_start (EV_A_ &w->timer);
2317
2318 ev_start (EV_A_ (W)w, 1);
2319}
2320
2321void
2322ev_stat_stop (EV_P_ ev_stat *w)
2323{
2324 clear_pending (EV_A_ (W)w);
2325 if (expect_false (!ev_is_active (w)))
2326 return;
2327
2328#if EV_USE_INOTIFY
2329 infy_del (EV_A_ w);
2330#endif
2331 ev_timer_stop (EV_A_ &w->timer);
2332
2333 ev_stop (EV_A_ (W)w);
2334}
2335#endif
2336
2337#if EV_IDLE_ENABLE
2338void
2339ev_idle_start (EV_P_ ev_idle *w)
2340{
2341 if (expect_false (ev_is_active (w)))
2342 return;
2343
2344 pri_adjust (EV_A_ (W)w);
2345
2346 {
2347 int active = ++idlecnt [ABSPRI (w)];
2348
2349 ++idleall;
2350 ev_start (EV_A_ (W)w, active);
2351
2352 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2353 idles [ABSPRI (w)][active - 1] = w;
2354 }
2355}
2356
2357void
2358ev_idle_stop (EV_P_ ev_idle *w)
2359{
2360 clear_pending (EV_A_ (W)w);
2361 if (expect_false (!ev_is_active (w)))
2362 return;
2363
2364 {
2365 int active = ((W)w)->active;
2366
2367 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2368 ((W)idles [ABSPRI (w)][active - 1])->active = active;
2369
2370 ev_stop (EV_A_ (W)w);
2371 --idleall;
2372 }
2373}
2374#endif
2375
2376void
2377ev_prepare_start (EV_P_ ev_prepare *w)
2378{
2379 if (expect_false (ev_is_active (w)))
2380 return;
2381
2382 ev_start (EV_A_ (W)w, ++preparecnt);
2383 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2384 prepares [preparecnt - 1] = w;
2385}
2386
2387void
2388ev_prepare_stop (EV_P_ ev_prepare *w)
2389{
2390 clear_pending (EV_A_ (W)w);
2391 if (expect_false (!ev_is_active (w)))
2392 return;
2393
2394 {
2395 int active = ((W)w)->active;
2396 prepares [active - 1] = prepares [--preparecnt];
2397 ((W)prepares [active - 1])->active = active;
2398 }
2399
2400 ev_stop (EV_A_ (W)w);
2401}
2402
2403void
2404ev_check_start (EV_P_ ev_check *w)
2405{
2406 if (expect_false (ev_is_active (w)))
2407 return;
2408
2409 ev_start (EV_A_ (W)w, ++checkcnt);
2410 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2411 checks [checkcnt - 1] = w;
2412}
2413
2414void
2415ev_check_stop (EV_P_ ev_check *w)
2416{
2417 clear_pending (EV_A_ (W)w);
2418 if (expect_false (!ev_is_active (w)))
2419 return;
2420
2421 {
2422 int active = ((W)w)->active;
2423 checks [active - 1] = checks [--checkcnt];
2424 ((W)checks [active - 1])->active = active;
2425 }
2426
2427 ev_stop (EV_A_ (W)w);
2428}
2429
2430#if EV_EMBED_ENABLE
2431void noinline
2432ev_embed_sweep (EV_P_ ev_embed *w)
2433{
2434 ev_loop (w->other, EVLOOP_NONBLOCK);
2435}
2436
2437static void
2438embed_io_cb (EV_P_ ev_io *io, int revents)
2439{
2440 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2441
2442 if (ev_cb (w))
2443 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2444 else
2445 ev_loop (w->other, EVLOOP_NONBLOCK);
2446}
2447
2448static void
2449embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2450{
2451 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2452
2453 {
2454 struct ev_loop *loop = w->other;
2455
2456 while (fdchangecnt)
2457 {
2458 fd_reify (EV_A);
2459 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2460 }
2461 }
2462}
2463
2464#if 0
2465static void
2466embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2467{
2468 ev_idle_stop (EV_A_ idle);
2469}
2470#endif
2471
2472void
2473ev_embed_start (EV_P_ ev_embed *w)
2474{
2475 if (expect_false (ev_is_active (w)))
2476 return;
2477
2478 {
2479 struct ev_loop *loop = w->other;
2480 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2481 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2482 }
2483
2484 ev_set_priority (&w->io, ev_priority (w));
2485 ev_io_start (EV_A_ &w->io);
2486
2487 ev_prepare_init (&w->prepare, embed_prepare_cb);
2488 ev_set_priority (&w->prepare, EV_MINPRI);
2489 ev_prepare_start (EV_A_ &w->prepare);
2490
2491 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2492
2493 ev_start (EV_A_ (W)w, 1);
2494}
2495
2496void
2497ev_embed_stop (EV_P_ ev_embed *w)
2498{
2499 clear_pending (EV_A_ (W)w);
2500 if (expect_false (!ev_is_active (w)))
2501 return;
2502
2503 ev_io_stop (EV_A_ &w->io);
2504 ev_prepare_stop (EV_A_ &w->prepare);
2505
2506 ev_stop (EV_A_ (W)w);
2507}
2508#endif
2509
2510#if EV_FORK_ENABLE
2511void
2512ev_fork_start (EV_P_ ev_fork *w)
2513{
2514 if (expect_false (ev_is_active (w)))
2515 return;
2516
2517 ev_start (EV_A_ (W)w, ++forkcnt);
2518 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2519 forks [forkcnt - 1] = w;
2520}
2521
2522void
2523ev_fork_stop (EV_P_ ev_fork *w)
2524{
2525 clear_pending (EV_A_ (W)w);
2526 if (expect_false (!ev_is_active (w)))
2527 return;
2528
2529 {
2530 int active = ((W)w)->active;
2531 forks [active - 1] = forks [--forkcnt];
2532 ((W)forks [active - 1])->active = active;
2533 }
2534
2535 ev_stop (EV_A_ (W)w);
2536}
2537#endif
2538
2539#if EV_ASYNC_ENABLE
2540void
2541ev_async_start (EV_P_ ev_async *w)
2542{
2543 if (expect_false (ev_is_active (w)))
2544 return;
2545
2546 evpipe_init (EV_A);
2547
2548 ev_start (EV_A_ (W)w, ++asynccnt);
2549 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2550 asyncs [asynccnt - 1] = w;
2551}
2552
2553void
2554ev_async_stop (EV_P_ ev_async *w)
2555{
2556 clear_pending (EV_A_ (W)w);
2557 if (expect_false (!ev_is_active (w)))
2558 return;
2559
2560 {
2561 int active = ((W)w)->active;
2562 asyncs [active - 1] = asyncs [--asynccnt];
2563 ((W)asyncs [active - 1])->active = active;
2564 }
2565
2566 ev_stop (EV_A_ (W)w);
2567}
2568
2569void
2570ev_async_send (EV_P_ ev_async *w)
2571{
2572 w->sent = 1;
2573 evpipe_write (EV_A_ &gotasync);
2574}
2575#endif
2576
1520/*****************************************************************************/ 2577/*****************************************************************************/
1521 2578
1522struct ev_once 2579struct ev_once
1523{ 2580{
1524 struct ev_io io; 2581 ev_io io;
1525 struct ev_timer to; 2582 ev_timer to;
1526 void (*cb)(int revents, void *arg); 2583 void (*cb)(int revents, void *arg);
1527 void *arg; 2584 void *arg;
1528}; 2585};
1529 2586
1530static void 2587static void
… …
1539 2596
1540 cb (revents, arg); 2597 cb (revents, arg);
1541} 2598}
1542 2599
1543static void 2600static void
1544once_cb_io (EV_P_ struct ev_io *w, int revents) 2601once_cb_io (EV_P_ ev_io *w, int revents)
1545{ 2602{
1546 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2603 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1547} 2604}
1548 2605
1549static void 2606static void
1550once_cb_to (EV_P_ struct ev_timer *w, int revents) 2607once_cb_to (EV_P_ ev_timer *w, int revents)
1551{ 2608{
1552 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2609 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1553} 2610}
1554 2611
1555void 2612void
1556ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2613ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1557{ 2614{
1558 struct ev_once *once = ev_malloc (sizeof (struct ev_once)); 2615 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1559 2616
1560 if (!once) 2617 if (expect_false (!once))
2618 {
1561 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 2619 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1562 else 2620 return;
1563 { 2621 }
2622
1564 once->cb = cb; 2623 once->cb = cb;
1565 once->arg = arg; 2624 once->arg = arg;
1566 2625
1567 ev_watcher_init (&once->io, once_cb_io); 2626 ev_init (&once->io, once_cb_io);
1568 if (fd >= 0) 2627 if (fd >= 0)
1569 { 2628 {
1570 ev_io_set (&once->io, fd, events); 2629 ev_io_set (&once->io, fd, events);
1571 ev_io_start (EV_A_ &once->io); 2630 ev_io_start (EV_A_ &once->io);
1572 } 2631 }
1573 2632
1574 ev_watcher_init (&once->to, once_cb_to); 2633 ev_init (&once->to, once_cb_to);
1575 if (timeout >= 0.) 2634 if (timeout >= 0.)
1576 { 2635 {
1577 ev_timer_set (&once->to, timeout, 0.); 2636 ev_timer_set (&once->to, timeout, 0.);
1578 ev_timer_start (EV_A_ &once->to); 2637 ev_timer_start (EV_A_ &once->to);
1579 }
1580 } 2638 }
1581} 2639}
1582 2640
2641#if EV_MULTIPLICITY
2642 #include "ev_wrap.h"
2643#endif
2644
2645#ifdef __cplusplus
2646}
2647#endif
2648

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