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Comparing libev/ev.c (file contents):
Revision 1.30 by root, Thu Nov 1 08:28:33 2007 UTC vs.
Revision 1.79 by root, Fri Nov 9 15:15:20 2007 UTC

1/* 1/*
2 * libev event processing core, watcher management
3 *
2 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3 * All rights reserved. 5 * All rights reserved.
4 * 6 *
5 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are 8 * modification, are permitted provided that the following conditions are
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */ 30 */
29#if EV_USE_CONFIG_H 31#ifndef EV_STANDALONE
30# include "config.h" 32# include "config.h"
33
34# if HAVE_CLOCK_GETTIME
35# define EV_USE_MONOTONIC 1
36# define EV_USE_REALTIME 1
37# endif
38
39# if HAVE_SELECT && HAVE_SYS_SELECT_H
40# define EV_USE_SELECT 1
41# endif
42
43# if HAVE_POLL && HAVE_POLL_H
44# define EV_USE_POLL 1
45# endif
46
47# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
48# define EV_USE_EPOLL 1
49# endif
50
51# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
52# define EV_USE_KQUEUE 1
53# endif
54
31#endif 55#endif
32 56
33#include <math.h> 57#include <math.h>
34#include <stdlib.h> 58#include <stdlib.h>
35#include <unistd.h>
36#include <fcntl.h> 59#include <fcntl.h>
37#include <signal.h>
38#include <stddef.h> 60#include <stddef.h>
39 61
40#include <stdio.h> 62#include <stdio.h>
41 63
42#include <assert.h> 64#include <assert.h>
43#include <errno.h> 65#include <errno.h>
44#include <sys/types.h> 66#include <sys/types.h>
45#include <sys/wait.h>
46#include <sys/time.h>
47#include <time.h> 67#include <time.h>
48 68
69#include <signal.h>
70
71#ifndef WIN32
72# include <unistd.h>
73# include <sys/time.h>
74# include <sys/wait.h>
75#endif
76/**/
77
49#ifndef EV_USE_MONOTONIC 78#ifndef EV_USE_MONOTONIC
50# ifdef CLOCK_MONOTONIC
51# define EV_USE_MONOTONIC 1 79# define EV_USE_MONOTONIC 1
52# endif
53#endif 80#endif
54 81
55#ifndef EV_USE_SELECT 82#ifndef EV_USE_SELECT
56# define EV_USE_SELECT 1 83# define EV_USE_SELECT 1
57#endif 84#endif
58 85
86#ifndef EV_USE_POLL
87# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
88#endif
89
59#ifndef EV_USE_EPOLL 90#ifndef EV_USE_EPOLL
60# define EV_USE_EPOLL 0 91# define EV_USE_EPOLL 0
61#endif 92#endif
62 93
94#ifndef EV_USE_KQUEUE
95# define EV_USE_KQUEUE 0
96#endif
97
98#ifndef EV_USE_WIN32
99# ifdef WIN32
100# define EV_USE_WIN32 0 /* it does not exist, use select */
101# undef EV_USE_SELECT
102# define EV_USE_SELECT 1
103# else
104# define EV_USE_WIN32 0
105# endif
106#endif
107
63#ifndef EV_USE_REALTIME 108#ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */ 109# define EV_USE_REALTIME 1
65#endif 110#endif
111
112/**/
113
114#ifndef CLOCK_MONOTONIC
115# undef EV_USE_MONOTONIC
116# define EV_USE_MONOTONIC 0
117#endif
118
119#ifndef CLOCK_REALTIME
120# undef EV_USE_REALTIME
121# define EV_USE_REALTIME 0
122#endif
123
124/**/
66 125
67#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 126#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
68#define MAX_BLOCKTIME 59.731 127#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
69#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */ 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 */
70 130
71#include "ev.h" 131#include "ev.h"
132
133#if __GNUC__ >= 3
134# define expect(expr,value) __builtin_expect ((expr),(value))
135# define inline inline
136#else
137# define expect(expr,value) (expr)
138# define inline static
139#endif
140
141#define expect_false(expr) expect ((expr) != 0, 0)
142#define expect_true(expr) expect ((expr) != 0, 1)
143
144#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
145#define ABSPRI(w) ((w)->priority - EV_MINPRI)
72 146
73typedef struct ev_watcher *W; 147typedef struct ev_watcher *W;
74typedef struct ev_watcher_list *WL; 148typedef struct ev_watcher_list *WL;
75typedef struct ev_watcher_time *WT; 149typedef struct ev_watcher_time *WT;
76 150
77static ev_tstamp now, diff; /* monotonic clock */ 151static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
78ev_tstamp ev_now;
79int ev_method;
80 152
81static int have_monotonic; /* runtime */ 153#include "ev_win32.c"
82
83static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
84static void (*method_modify)(int fd, int oev, int nev);
85static void (*method_poll)(ev_tstamp timeout);
86 154
87/*****************************************************************************/ 155/*****************************************************************************/
88 156
89ev_tstamp 157static void (*syserr_cb)(const char *msg);
158
159void ev_set_syserr_cb (void (*cb)(const char *msg))
160{
161 syserr_cb = cb;
162}
163
164static void
165syserr (const char *msg)
166{
167 if (!msg)
168 msg = "(libev) system error";
169
170 if (syserr_cb)
171 syserr_cb (msg);
172 else
173 {
174 perror (msg);
175 abort ();
176 }
177}
178
179static void *(*alloc)(void *ptr, long size);
180
181void ev_set_allocator (void *(*cb)(void *ptr, long size))
182{
183 alloc = cb;
184}
185
186static void *
187ev_realloc (void *ptr, long size)
188{
189 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
190
191 if (!ptr && size)
192 {
193 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
194 abort ();
195 }
196
197 return ptr;
198}
199
200#define ev_malloc(size) ev_realloc (0, (size))
201#define ev_free(ptr) ev_realloc ((ptr), 0)
202
203/*****************************************************************************/
204
205typedef struct
206{
207 WL head;
208 unsigned char events;
209 unsigned char reify;
210} ANFD;
211
212typedef struct
213{
214 W w;
215 int events;
216} ANPENDING;
217
218#if EV_MULTIPLICITY
219
220struct ev_loop
221{
222# define VAR(name,decl) decl;
223# include "ev_vars.h"
224};
225# undef VAR
226# include "ev_wrap.h"
227
228#else
229
230# define VAR(name,decl) static decl;
231# include "ev_vars.h"
232# undef VAR
233
234#endif
235
236/*****************************************************************************/
237
238inline ev_tstamp
90ev_time (void) 239ev_time (void)
91{ 240{
92#if EV_USE_REALTIME 241#if EV_USE_REALTIME
93 struct timespec ts; 242 struct timespec ts;
94 clock_gettime (CLOCK_REALTIME, &ts); 243 clock_gettime (CLOCK_REALTIME, &ts);
98 gettimeofday (&tv, 0); 247 gettimeofday (&tv, 0);
99 return tv.tv_sec + tv.tv_usec * 1e-6; 248 return tv.tv_sec + tv.tv_usec * 1e-6;
100#endif 249#endif
101} 250}
102 251
103static ev_tstamp 252inline ev_tstamp
104get_clock (void) 253get_clock (void)
105{ 254{
106#if EV_USE_MONOTONIC 255#if EV_USE_MONOTONIC
107 if (have_monotonic) 256 if (expect_true (have_monotonic))
108 { 257 {
109 struct timespec ts; 258 struct timespec ts;
110 clock_gettime (CLOCK_MONOTONIC, &ts); 259 clock_gettime (CLOCK_MONOTONIC, &ts);
111 return ts.tv_sec + ts.tv_nsec * 1e-9; 260 return ts.tv_sec + ts.tv_nsec * 1e-9;
112 } 261 }
113#endif 262#endif
114 263
115 return ev_time (); 264 return ev_time ();
116} 265}
117 266
267ev_tstamp
268ev_now (EV_P)
269{
270 return rt_now;
271}
272
118#define array_roundsize(base,n) ((n) | 4 & ~3) 273#define array_roundsize(type,n) ((n) | 4 & ~3)
119 274
120#define array_needsize(base,cur,cnt,init) \ 275#define array_needsize(type,base,cur,cnt,init) \
121 if ((cnt) > cur) \ 276 if (expect_false ((cnt) > cur)) \
122 { \ 277 { \
123 int newcnt = cur; \ 278 int newcnt = cur; \
124 do \ 279 do \
125 { \ 280 { \
126 newcnt = array_roundsize (base, newcnt << 1); \ 281 newcnt = array_roundsize (type, newcnt << 1); \
127 } \ 282 } \
128 while ((cnt) > newcnt); \ 283 while ((cnt) > newcnt); \
129 \ 284 \
130 base = realloc (base, sizeof (*base) * (newcnt)); \ 285 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
131 init (base + cur, newcnt - cur); \ 286 init (base + cur, newcnt - cur); \
132 cur = newcnt; \ 287 cur = newcnt; \
133 } 288 }
289
290#define array_slim(type,stem) \
291 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
292 { \
293 stem ## max = array_roundsize (stem ## cnt >> 1); \
294 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
295 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
296 }
297
298/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
299/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
300#define array_free_microshit(stem) \
301 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
302
303#define array_free(stem, idx) \
304 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
134 305
135/*****************************************************************************/ 306/*****************************************************************************/
136
137typedef struct
138{
139 struct ev_io *head;
140 int events;
141} ANFD;
142
143static ANFD *anfds;
144static int anfdmax;
145 307
146static void 308static void
147anfds_init (ANFD *base, int count) 309anfds_init (ANFD *base, int count)
148{ 310{
149 while (count--) 311 while (count--)
150 { 312 {
151 base->head = 0; 313 base->head = 0;
152 base->events = EV_NONE; 314 base->events = EV_NONE;
315 base->reify = 0;
316
153 ++base; 317 ++base;
154 } 318 }
155} 319}
156 320
157typedef struct 321void
322ev_feed_event (EV_P_ void *w, int revents)
158{ 323{
159 W w; 324 W w_ = (W)w;
160 int events;
161} ANPENDING;
162 325
163static ANPENDING *pendings; 326 if (w_->pending)
164static int pendingmax, pendingcnt; 327 {
328 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
329 return;
330 }
165 331
166static void
167event (W w, int events)
168{
169 w->pending = ++pendingcnt; 332 w_->pending = ++pendingcnt [ABSPRI (w_)];
170 array_needsize (pendings, pendingmax, pendingcnt, ); 333 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
171 pendings [pendingcnt - 1].w = w; 334 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
172 pendings [pendingcnt - 1].events = events; 335 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
173} 336}
174 337
175static void 338static void
176queue_events (W *events, int eventcnt, int type) 339queue_events (EV_P_ W *events, int eventcnt, int type)
177{ 340{
178 int i; 341 int i;
179 342
180 for (i = 0; i < eventcnt; ++i) 343 for (i = 0; i < eventcnt; ++i)
181 event (events [i], type); 344 ev_feed_event (EV_A_ events [i], type);
182} 345}
183 346
184static void 347inline void
185fd_event (int fd, int events) 348fd_event (EV_P_ int fd, int revents)
186{ 349{
187 ANFD *anfd = anfds + fd; 350 ANFD *anfd = anfds + fd;
188 struct ev_io *w; 351 struct ev_io *w;
189 352
190 for (w = anfd->head; w; w = w->next) 353 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
191 { 354 {
192 int ev = w->events & events; 355 int ev = w->events & revents;
193 356
194 if (ev) 357 if (ev)
195 event ((W)w, ev); 358 ev_feed_event (EV_A_ (W)w, ev);
196 } 359 }
360}
361
362void
363ev_feed_fd_event (EV_P_ int fd, int revents)
364{
365 fd_event (EV_A_ fd, revents);
197} 366}
198 367
199/*****************************************************************************/ 368/*****************************************************************************/
200 369
201static int *fdchanges;
202static int fdchangemax, fdchangecnt;
203
204static void 370static void
205fd_reify (void) 371fd_reify (EV_P)
206{ 372{
207 int i; 373 int i;
208 374
209 for (i = 0; i < fdchangecnt; ++i) 375 for (i = 0; i < fdchangecnt; ++i)
210 { 376 {
212 ANFD *anfd = anfds + fd; 378 ANFD *anfd = anfds + fd;
213 struct ev_io *w; 379 struct ev_io *w;
214 380
215 int events = 0; 381 int events = 0;
216 382
217 for (w = anfd->head; w; w = w->next) 383 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
218 events |= w->events; 384 events |= w->events;
219 385
220 anfd->events &= ~EV_REIFY; 386 anfd->reify = 0;
221 387
222 if (anfd->events != events)
223 {
224 method_modify (fd, anfd->events, events); 388 method_modify (EV_A_ fd, anfd->events, events);
225 anfd->events = events; 389 anfd->events = events;
226 }
227 } 390 }
228 391
229 fdchangecnt = 0; 392 fdchangecnt = 0;
230} 393}
231 394
232static void 395static void
233fd_change (int fd) 396fd_change (EV_P_ int fd)
234{ 397{
235 if (anfds [fd].events & EV_REIFY || fdchangecnt < 0) 398 if (anfds [fd].reify)
236 return; 399 return;
237 400
238 anfds [fd].events |= EV_REIFY; 401 anfds [fd].reify = 1;
239 402
240 ++fdchangecnt; 403 ++fdchangecnt;
241 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 404 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
242 fdchanges [fdchangecnt - 1] = fd; 405 fdchanges [fdchangecnt - 1] = fd;
243} 406}
244 407
408static void
409fd_kill (EV_P_ int fd)
410{
411 struct ev_io *w;
412
413 while ((w = (struct ev_io *)anfds [fd].head))
414 {
415 ev_io_stop (EV_A_ w);
416 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
417 }
418}
419
420static int
421fd_valid (int fd)
422{
423#ifdef WIN32
424 return !!win32_get_osfhandle (fd);
425#else
426 return fcntl (fd, F_GETFD) != -1;
427#endif
428}
429
245/* called on EBADF to verify fds */ 430/* called on EBADF to verify fds */
246static void 431static void
247fd_recheck (void) 432fd_ebadf (EV_P)
248{ 433{
249 int fd; 434 int fd;
250 435
251 for (fd = 0; fd < anfdmax; ++fd) 436 for (fd = 0; fd < anfdmax; ++fd)
252 if (anfds [fd].events) 437 if (anfds [fd].events)
253 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 438 if (!fd_valid (fd) == -1 && errno == EBADF)
254 while (anfds [fd].head) 439 fd_kill (EV_A_ fd);
440}
441
442/* called on ENOMEM in select/poll to kill some fds and retry */
443static void
444fd_enomem (EV_P)
445{
446 int fd;
447
448 for (fd = anfdmax; fd--; )
449 if (anfds [fd].events)
255 { 450 {
256 event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT); 451 fd_kill (EV_A_ fd);
257 ev_io_stop (anfds [fd].head); 452 return;
258 } 453 }
454}
455
456/* usually called after fork if method needs to re-arm all fds from scratch */
457static void
458fd_rearm_all (EV_P)
459{
460 int fd;
461
462 /* this should be highly optimised to not do anything but set a flag */
463 for (fd = 0; fd < anfdmax; ++fd)
464 if (anfds [fd].events)
465 {
466 anfds [fd].events = 0;
467 fd_change (EV_A_ fd);
468 }
259} 469}
260 470
261/*****************************************************************************/ 471/*****************************************************************************/
262 472
263static struct ev_timer **timers;
264static int timermax, timercnt;
265
266static struct ev_periodic **periodics;
267static int periodicmax, periodiccnt;
268
269static void 473static void
270upheap (WT *timers, int k) 474upheap (WT *heap, int k)
271{ 475{
272 WT w = timers [k]; 476 WT w = heap [k];
273 477
274 while (k && timers [k >> 1]->at > w->at) 478 while (k && heap [k >> 1]->at > w->at)
275 { 479 {
276 timers [k] = timers [k >> 1]; 480 heap [k] = heap [k >> 1];
277 timers [k]->active = k + 1; 481 ((W)heap [k])->active = k + 1;
278 k >>= 1; 482 k >>= 1;
279 } 483 }
280 484
281 timers [k] = w; 485 heap [k] = w;
282 timers [k]->active = k + 1; 486 ((W)heap [k])->active = k + 1;
283 487
284} 488}
285 489
286static void 490static void
287downheap (WT *timers, int N, int k) 491downheap (WT *heap, int N, int k)
288{ 492{
289 WT w = timers [k]; 493 WT w = heap [k];
290 494
291 while (k < (N >> 1)) 495 while (k < (N >> 1))
292 { 496 {
293 int j = k << 1; 497 int j = k << 1;
294 498
295 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 499 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
296 ++j; 500 ++j;
297 501
298 if (w->at <= timers [j]->at) 502 if (w->at <= heap [j]->at)
299 break; 503 break;
300 504
301 timers [k] = timers [j]; 505 heap [k] = heap [j];
302 timers [k]->active = k + 1; 506 ((W)heap [k])->active = k + 1;
303 k = j; 507 k = j;
304 } 508 }
305 509
306 timers [k] = w; 510 heap [k] = w;
307 timers [k]->active = k + 1; 511 ((W)heap [k])->active = k + 1;
308} 512}
309 513
310/*****************************************************************************/ 514/*****************************************************************************/
311 515
312typedef struct 516typedef struct
313{ 517{
314 struct ev_signal *head; 518 WL head;
315 sig_atomic_t gotsig; 519 sig_atomic_t volatile gotsig;
316} ANSIG; 520} ANSIG;
317 521
318static ANSIG *signals; 522static ANSIG *signals;
319static int signalmax; 523static int signalmax;
320 524
321static int sigpipe [2]; 525static int sigpipe [2];
322static sig_atomic_t gotsig; 526static sig_atomic_t volatile gotsig;
323static struct ev_io sigev; 527static struct ev_io sigev;
324 528
325static void 529static void
326signals_init (ANSIG *base, int count) 530signals_init (ANSIG *base, int count)
327{ 531{
328 while (count--) 532 while (count--)
329 { 533 {
330 base->head = 0; 534 base->head = 0;
331 base->gotsig = 0; 535 base->gotsig = 0;
536
332 ++base; 537 ++base;
333 } 538 }
334} 539}
335 540
336static void 541static void
337sighandler (int signum) 542sighandler (int signum)
338{ 543{
544#if WIN32
545 signal (signum, sighandler);
546#endif
547
339 signals [signum - 1].gotsig = 1; 548 signals [signum - 1].gotsig = 1;
340 549
341 if (!gotsig) 550 if (!gotsig)
342 { 551 {
552 int old_errno = errno;
343 gotsig = 1; 553 gotsig = 1;
554#ifdef WIN32
555 send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
556#else
344 write (sigpipe [1], &gotsig, 1); 557 write (sigpipe [1], &signum, 1);
558#endif
559 errno = old_errno;
345 } 560 }
346} 561}
347 562
563void
564ev_feed_signal_event (EV_P_ int signum)
565{
566#if EV_MULTIPLICITY
567 assert (("feeding signal events is only supported in the default loop", loop == default_loop));
568#endif
569
570 --signum;
571
572 if (signum < 0 || signum >= signalmax)
573 return;
574
575 signals [signum].gotsig = 0;
576
577 for (w = signals [signum].head; w; w = w->next)
578 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
579}
580
348static void 581static void
349sigcb (struct ev_io *iow, int revents) 582sigcb (EV_P_ struct ev_io *iow, int revents)
350{ 583{
351 struct ev_signal *w; 584 WL w;
352 int sig; 585 int signum;
353 586
587#ifdef WIN32
588 recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
589#else
590 read (sigpipe [0], &revents, 1);
591#endif
354 gotsig = 0; 592 gotsig = 0;
355 read (sigpipe [0], &revents, 1);
356 593
357 for (sig = signalmax; sig--; ) 594 for (signum = signalmax; signum--; )
358 if (signals [sig].gotsig) 595 if (signals [signum].gotsig)
359 { 596 sigevent (EV_A_ signum + 1);
360 signals [sig].gotsig = 0;
361
362 for (w = signals [sig].head; w; w = w->next)
363 event ((W)w, EV_SIGNAL);
364 }
365} 597}
366 598
367static void 599static void
368siginit (void) 600siginit (EV_P)
369{ 601{
602#ifndef WIN32
370 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC); 603 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
371 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC); 604 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
372 605
373 /* rather than sort out wether we really need nb, set it */ 606 /* rather than sort out wether we really need nb, set it */
374 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK); 607 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
375 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK); 608 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
609#endif
376 610
377 ev_io_set (&sigev, sigpipe [0], EV_READ); 611 ev_io_set (&sigev, sigpipe [0], EV_READ);
378 ev_io_start (&sigev); 612 ev_io_start (EV_A_ &sigev);
613 ev_unref (EV_A); /* child watcher should not keep loop alive */
379} 614}
380 615
381/*****************************************************************************/ 616/*****************************************************************************/
382 617
383static struct ev_idle **idles;
384static int idlemax, idlecnt;
385
386static struct ev_prepare **prepares;
387static int preparemax, preparecnt;
388
389static struct ev_check **checks;
390static int checkmax, checkcnt;
391
392/*****************************************************************************/
393
394static struct ev_child *childs [PID_HASHSIZE]; 618static struct ev_child *childs [PID_HASHSIZE];
619
620#ifndef WIN32
621
395static struct ev_signal childev; 622static struct ev_signal childev;
396 623
397#ifndef WCONTINUED 624#ifndef WCONTINUED
398# define WCONTINUED 0 625# define WCONTINUED 0
399#endif 626#endif
400 627
401static void 628static void
402childcb (struct ev_signal *sw, int revents) 629child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
403{ 630{
404 struct ev_child *w; 631 struct ev_child *w;
632
633 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
634 if (w->pid == pid || !w->pid)
635 {
636 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
637 w->rpid = pid;
638 w->rstatus = status;
639 ev_feed_event (EV_A_ (W)w, EV_CHILD);
640 }
641}
642
643static void
644childcb (EV_P_ struct ev_signal *sw, int revents)
645{
405 int pid, status; 646 int pid, status;
406 647
407 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 648 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
408 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 649 {
409 if (w->pid == pid || w->pid == -1) 650 /* make sure we are called again until all childs have been reaped */
410 { 651 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
411 w->status = status; 652
412 event ((W)w, EV_CHILD); 653 child_reap (EV_A_ sw, pid, pid, status);
413 } 654 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
655 }
414} 656}
657
658#endif
415 659
416/*****************************************************************************/ 660/*****************************************************************************/
417 661
662#if EV_USE_KQUEUE
663# include "ev_kqueue.c"
664#endif
418#if EV_USE_EPOLL 665#if EV_USE_EPOLL
419# include "ev_epoll.c" 666# include "ev_epoll.c"
420#endif 667#endif
668#if EV_USE_POLL
669# include "ev_poll.c"
670#endif
421#if EV_USE_SELECT 671#if EV_USE_SELECT
422# include "ev_select.c" 672# include "ev_select.c"
423#endif 673#endif
424 674
425int 675int
432ev_version_minor (void) 682ev_version_minor (void)
433{ 683{
434 return EV_VERSION_MINOR; 684 return EV_VERSION_MINOR;
435} 685}
436 686
437int ev_init (int flags) 687/* return true if we are running with elevated privileges and should ignore env variables */
688static int
689enable_secure (void)
438{ 690{
691#ifdef WIN32
692 return 0;
693#else
694 return getuid () != geteuid ()
695 || getgid () != getegid ();
696#endif
697}
698
699int
700ev_method (EV_P)
701{
702 return method;
703}
704
705static void
706loop_init (EV_P_ int methods)
707{
439 if (!ev_method) 708 if (!method)
440 { 709 {
441#if EV_USE_MONOTONIC 710#if EV_USE_MONOTONIC
442 { 711 {
443 struct timespec ts; 712 struct timespec ts;
444 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 713 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
445 have_monotonic = 1; 714 have_monotonic = 1;
446 } 715 }
447#endif 716#endif
448 717
449 ev_now = ev_time (); 718 rt_now = ev_time ();
450 now = get_clock (); 719 mn_now = get_clock ();
720 now_floor = mn_now;
451 diff = ev_now - now; 721 rtmn_diff = rt_now - mn_now;
452 722
453 if (pipe (sigpipe)) 723 if (methods == EVMETHOD_AUTO)
454 return 0; 724 if (!enable_secure () && getenv ("LIBEV_METHODS"))
455 725 methods = atoi (getenv ("LIBEV_METHODS"));
726 else
456 ev_method = EVMETHOD_NONE; 727 methods = EVMETHOD_ANY;
728
729 method = 0;
730#if EV_USE_WIN32
731 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
732#endif
733#if EV_USE_KQUEUE
734 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
735#endif
457#if EV_USE_EPOLL 736#if EV_USE_EPOLL
458 if (ev_method == EVMETHOD_NONE) epoll_init (flags); 737 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
738#endif
739#if EV_USE_POLL
740 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
459#endif 741#endif
460#if EV_USE_SELECT 742#if EV_USE_SELECT
461 if (ev_method == EVMETHOD_NONE) select_init (flags); 743 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
462#endif 744#endif
463 745
746 ev_watcher_init (&sigev, sigcb);
747 ev_set_priority (&sigev, EV_MAXPRI);
748 }
749}
750
751void
752loop_destroy (EV_P)
753{
754 int i;
755
756#if EV_USE_WIN32
757 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
758#endif
759#if EV_USE_KQUEUE
760 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
761#endif
762#if EV_USE_EPOLL
763 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
764#endif
765#if EV_USE_POLL
766 if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
767#endif
768#if EV_USE_SELECT
769 if (method == EVMETHOD_SELECT) select_destroy (EV_A);
770#endif
771
772 for (i = NUMPRI; i--; )
773 array_free (pending, [i]);
774
775 /* have to use the microsoft-never-gets-it-right macro */
776 array_free_microshit (fdchange);
777 array_free_microshit (timer);
778 array_free_microshit (periodic);
779 array_free_microshit (idle);
780 array_free_microshit (prepare);
781 array_free_microshit (check);
782
783 method = 0;
784}
785
786static void
787loop_fork (EV_P)
788{
789#if EV_USE_EPOLL
790 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
791#endif
792#if EV_USE_KQUEUE
793 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
794#endif
795
796 if (ev_is_active (&sigev))
797 {
798 /* default loop */
799
800 ev_ref (EV_A);
801 ev_io_stop (EV_A_ &sigev);
802 close (sigpipe [0]);
803 close (sigpipe [1]);
804
805 while (pipe (sigpipe))
806 syserr ("(libev) error creating pipe");
807
808 siginit (EV_A);
809 }
810
811 postfork = 0;
812}
813
814#if EV_MULTIPLICITY
815struct ev_loop *
816ev_loop_new (int methods)
817{
818 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
819
820 memset (loop, 0, sizeof (struct ev_loop));
821
822 loop_init (EV_A_ methods);
823
824 if (ev_method (EV_A))
825 return loop;
826
827 return 0;
828}
829
830void
831ev_loop_destroy (EV_P)
832{
833 loop_destroy (EV_A);
834 ev_free (loop);
835}
836
837void
838ev_loop_fork (EV_P)
839{
840 postfork = 1;
841}
842
843#endif
844
845#if EV_MULTIPLICITY
846struct ev_loop default_loop_struct;
847static struct ev_loop *default_loop;
848
849struct ev_loop *
850#else
851static int default_loop;
852
853int
854#endif
855ev_default_loop (int methods)
856{
857 if (sigpipe [0] == sigpipe [1])
858 if (pipe (sigpipe))
859 return 0;
860
861 if (!default_loop)
862 {
863#if EV_MULTIPLICITY
864 struct ev_loop *loop = default_loop = &default_loop_struct;
865#else
866 default_loop = 1;
867#endif
868
869 loop_init (EV_A_ methods);
870
464 if (ev_method) 871 if (ev_method (EV_A))
465 { 872 {
466 ev_watcher_init (&sigev, sigcb);
467 siginit (); 873 siginit (EV_A);
468 874
875#ifndef WIN32
469 ev_signal_init (&childev, childcb, SIGCHLD); 876 ev_signal_init (&childev, childcb, SIGCHLD);
877 ev_set_priority (&childev, EV_MAXPRI);
470 ev_signal_start (&childev); 878 ev_signal_start (EV_A_ &childev);
879 ev_unref (EV_A); /* child watcher should not keep loop alive */
880#endif
471 } 881 }
882 else
883 default_loop = 0;
472 } 884 }
473 885
474 return ev_method; 886 return default_loop;
887}
888
889void
890ev_default_destroy (void)
891{
892#if EV_MULTIPLICITY
893 struct ev_loop *loop = default_loop;
894#endif
895
896#ifndef WIN32
897 ev_ref (EV_A); /* child watcher */
898 ev_signal_stop (EV_A_ &childev);
899#endif
900
901 ev_ref (EV_A); /* signal watcher */
902 ev_io_stop (EV_A_ &sigev);
903
904 close (sigpipe [0]); sigpipe [0] = 0;
905 close (sigpipe [1]); sigpipe [1] = 0;
906
907 loop_destroy (EV_A);
908}
909
910void
911ev_default_fork (void)
912{
913#if EV_MULTIPLICITY
914 struct ev_loop *loop = default_loop;
915#endif
916
917 if (method)
918 postfork = 1;
475} 919}
476 920
477/*****************************************************************************/ 921/*****************************************************************************/
478 922
479void
480ev_prefork (void)
481{
482 /* nop */
483}
484
485void
486ev_postfork_parent (void)
487{
488 /* nop */
489}
490
491void
492ev_postfork_child (void)
493{
494#if EV_USE_EPOLL
495 if (ev_method == EVMETHOD_EPOLL)
496 epoll_postfork_child ();
497#endif
498
499 ev_io_stop (&sigev);
500 close (sigpipe [0]);
501 close (sigpipe [1]);
502 pipe (sigpipe);
503 siginit ();
504}
505
506/*****************************************************************************/
507
508static void 923static int
924any_pending (EV_P)
925{
926 int pri;
927
928 for (pri = NUMPRI; pri--; )
929 if (pendingcnt [pri])
930 return 1;
931
932 return 0;
933}
934
935static void
509call_pending (void) 936call_pending (EV_P)
510{ 937{
938 int pri;
939
940 for (pri = NUMPRI; pri--; )
511 while (pendingcnt) 941 while (pendingcnt [pri])
512 { 942 {
513 ANPENDING *p = pendings + --pendingcnt; 943 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
514 944
515 if (p->w) 945 if (p->w)
516 { 946 {
517 p->w->pending = 0; 947 p->w->pending = 0;
518 p->w->cb (p->w, p->events); 948 p->w->cb (EV_A_ p->w, p->events);
519 } 949 }
520 } 950 }
521} 951}
522 952
523static void 953static void
524timers_reify (void) 954timers_reify (EV_P)
525{ 955{
526 while (timercnt && timers [0]->at <= now) 956 while (timercnt && ((WT)timers [0])->at <= mn_now)
527 { 957 {
528 struct ev_timer *w = timers [0]; 958 struct ev_timer *w = timers [0];
959
960 assert (("inactive timer on timer heap detected", ev_is_active (w)));
529 961
530 /* first reschedule or stop timer */ 962 /* first reschedule or stop timer */
531 if (w->repeat) 963 if (w->repeat)
532 { 964 {
965 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
533 w->at = now + w->repeat; 966 ((WT)w)->at = mn_now + w->repeat;
534 assert (("timer timeout in the past, negative repeat?", w->at > now));
535 downheap ((WT *)timers, timercnt, 0); 967 downheap ((WT *)timers, timercnt, 0);
536 } 968 }
537 else 969 else
538 ev_timer_stop (w); /* nonrepeating: stop timer */ 970 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
539 971
540 event ((W)w, EV_TIMEOUT); 972 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
541 } 973 }
542} 974}
543 975
544static void 976static void
545periodics_reify (void) 977periodics_reify (EV_P)
546{ 978{
547 while (periodiccnt && periodics [0]->at <= ev_now) 979 while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
548 { 980 {
549 struct ev_periodic *w = periodics [0]; 981 struct ev_periodic *w = periodics [0];
550 982
983 assert (("inactive timer on periodic heap detected", ev_is_active (w)));
984
551 /* first reschedule or stop timer */ 985 /* first reschedule or stop timer */
552 if (w->interval) 986 if (w->reschedule_cb)
553 { 987 {
988 ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001);
989
990 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));
991 downheap ((WT *)periodics, periodiccnt, 0);
992 }
993 else if (w->interval)
994 {
554 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 995 ((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
555 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 996 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
556 downheap ((WT *)periodics, periodiccnt, 0); 997 downheap ((WT *)periodics, periodiccnt, 0);
557 } 998 }
558 else 999 else
559 ev_periodic_stop (w); /* nonrepeating: stop timer */ 1000 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
560 1001
561 event ((W)w, EV_TIMEOUT); 1002 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
562 } 1003 }
563} 1004}
564 1005
565static void 1006static void
566periodics_reschedule (ev_tstamp diff) 1007periodics_reschedule (EV_P)
567{ 1008{
568 int i; 1009 int i;
569 1010
570 /* adjust periodics after time jump */ 1011 /* adjust periodics after time jump */
571 for (i = 0; i < periodiccnt; ++i) 1012 for (i = 0; i < periodiccnt; ++i)
572 { 1013 {
573 struct ev_periodic *w = periodics [i]; 1014 struct ev_periodic *w = periodics [i];
574 1015
1016 if (w->reschedule_cb)
1017 ((WT)w)->at = w->reschedule_cb (w, rt_now);
575 if (w->interval) 1018 else if (w->interval)
1019 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
1020 }
1021
1022 /* now rebuild the heap */
1023 for (i = periodiccnt >> 1; i--; )
1024 downheap ((WT *)periodics, periodiccnt, i);
1025}
1026
1027inline int
1028time_update_monotonic (EV_P)
1029{
1030 mn_now = get_clock ();
1031
1032 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1033 {
1034 rt_now = rtmn_diff + mn_now;
1035 return 0;
1036 }
1037 else
1038 {
1039 now_floor = mn_now;
1040 rt_now = ev_time ();
1041 return 1;
1042 }
1043}
1044
1045static void
1046time_update (EV_P)
1047{
1048 int i;
1049
1050#if EV_USE_MONOTONIC
1051 if (expect_true (have_monotonic))
1052 {
1053 if (time_update_monotonic (EV_A))
576 { 1054 {
577 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1055 ev_tstamp odiff = rtmn_diff;
578 1056
579 if (fabs (diff) >= 1e-4) 1057 for (i = 4; --i; ) /* loop a few times, before making important decisions */
580 { 1058 {
581 ev_periodic_stop (w); 1059 rtmn_diff = rt_now - mn_now;
582 ev_periodic_start (w);
583 1060
584 i = 0; /* restart loop, inefficient, but time jumps should be rare */ 1061 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
1062 return; /* all is well */
1063
1064 rt_now = ev_time ();
1065 mn_now = get_clock ();
1066 now_floor = mn_now;
585 } 1067 }
1068
1069 periodics_reschedule (EV_A);
1070 /* no timer adjustment, as the monotonic clock doesn't jump */
1071 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
586 } 1072 }
587 } 1073 }
588} 1074 else
589 1075#endif
590static void 1076 {
591time_update (void)
592{
593 int i;
594
595 ev_now = ev_time (); 1077 rt_now = ev_time ();
596 1078
597 if (have_monotonic) 1079 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
598 {
599 ev_tstamp odiff = diff;
600
601 for (i = 4; --i; ) /* loop a few times, before making important decisions */
602 { 1080 {
603 now = get_clock ();
604 diff = ev_now - now;
605
606 if (fabs (odiff - diff) < MIN_TIMEJUMP)
607 return; /* all is well */
608
609 ev_now = ev_time ();
610 }
611
612 periodics_reschedule (diff - odiff);
613 /* no timer adjustment, as the monotonic clock doesn't jump */
614 }
615 else
616 {
617 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
618 {
619 periodics_reschedule (ev_now - now); 1081 periodics_reschedule (EV_A);
620 1082
621 /* adjust timers. this is easy, as the offset is the same for all */ 1083 /* adjust timers. this is easy, as the offset is the same for all */
622 for (i = 0; i < timercnt; ++i) 1084 for (i = 0; i < timercnt; ++i)
623 timers [i]->at += diff; 1085 ((WT)timers [i])->at += rt_now - mn_now;
624 } 1086 }
625 1087
626 now = ev_now; 1088 mn_now = rt_now;
627 } 1089 }
628} 1090}
629 1091
630int ev_loop_done; 1092void
1093ev_ref (EV_P)
1094{
1095 ++activecnt;
1096}
631 1097
1098void
1099ev_unref (EV_P)
1100{
1101 --activecnt;
1102}
1103
1104static int loop_done;
1105
1106void
632void ev_loop (int flags) 1107ev_loop (EV_P_ int flags)
633{ 1108{
634 double block; 1109 double block;
635 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1110 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
636 1111
637 do 1112 do
638 { 1113 {
639 /* queue check watchers (and execute them) */ 1114 /* queue check watchers (and execute them) */
640 if (preparecnt) 1115 if (expect_false (preparecnt))
641 { 1116 {
642 queue_events ((W *)prepares, preparecnt, EV_PREPARE); 1117 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
643 call_pending (); 1118 call_pending (EV_A);
644 } 1119 }
645 1120
1121 /* we might have forked, so reify kernel state if necessary */
1122 if (expect_false (postfork))
1123 loop_fork (EV_A);
1124
646 /* update fd-related kernel structures */ 1125 /* update fd-related kernel structures */
647 fd_reify (); 1126 fd_reify (EV_A);
648 1127
649 /* calculate blocking time */ 1128 /* calculate blocking time */
650 1129
651 /* we only need this for !monotonic clockor timers, but as we basically 1130 /* we only need this for !monotonic clock or timers, but as we basically
652 always have timers, we just calculate it always */ 1131 always have timers, we just calculate it always */
1132#if EV_USE_MONOTONIC
1133 if (expect_true (have_monotonic))
1134 time_update_monotonic (EV_A);
1135 else
1136#endif
1137 {
653 ev_now = ev_time (); 1138 rt_now = ev_time ();
1139 mn_now = rt_now;
1140 }
654 1141
655 if (flags & EVLOOP_NONBLOCK || idlecnt) 1142 if (flags & EVLOOP_NONBLOCK || idlecnt)
656 block = 0.; 1143 block = 0.;
657 else 1144 else
658 { 1145 {
659 block = MAX_BLOCKTIME; 1146 block = MAX_BLOCKTIME;
660 1147
661 if (timercnt) 1148 if (timercnt)
662 { 1149 {
663 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 1150 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
664 if (block > to) block = to; 1151 if (block > to) block = to;
665 } 1152 }
666 1153
667 if (periodiccnt) 1154 if (periodiccnt)
668 { 1155 {
669 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1156 ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
670 if (block > to) block = to; 1157 if (block > to) block = to;
671 } 1158 }
672 1159
673 if (block < 0.) block = 0.; 1160 if (block < 0.) block = 0.;
674 } 1161 }
675 1162
676 method_poll (block); 1163 method_poll (EV_A_ block);
677 1164
678 /* update ev_now, do magic */ 1165 /* update rt_now, do magic */
679 time_update (); 1166 time_update (EV_A);
680 1167
681 /* queue pending timers and reschedule them */ 1168 /* queue pending timers and reschedule them */
682 timers_reify (); /* relative timers called last */ 1169 timers_reify (EV_A); /* relative timers called last */
683 periodics_reify (); /* absolute timers called first */ 1170 periodics_reify (EV_A); /* absolute timers called first */
684 1171
685 /* queue idle watchers unless io or timers are pending */ 1172 /* queue idle watchers unless io or timers are pending */
686 if (!pendingcnt) 1173 if (idlecnt && !any_pending (EV_A))
687 queue_events ((W *)idles, idlecnt, EV_IDLE); 1174 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
688 1175
689 /* queue check watchers, to be executed first */ 1176 /* queue check watchers, to be executed first */
690 if (checkcnt) 1177 if (checkcnt)
691 queue_events ((W *)checks, checkcnt, EV_CHECK); 1178 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
692 1179
693 call_pending (); 1180 call_pending (EV_A);
694 } 1181 }
695 while (!ev_loop_done); 1182 while (activecnt && !loop_done);
696 1183
697 if (ev_loop_done != 2) 1184 if (loop_done != 2)
698 ev_loop_done = 0; 1185 loop_done = 0;
1186}
1187
1188void
1189ev_unloop (EV_P_ int how)
1190{
1191 loop_done = how;
699} 1192}
700 1193
701/*****************************************************************************/ 1194/*****************************************************************************/
702 1195
703static void 1196inline void
704wlist_add (WL *head, WL elem) 1197wlist_add (WL *head, WL elem)
705{ 1198{
706 elem->next = *head; 1199 elem->next = *head;
707 *head = elem; 1200 *head = elem;
708} 1201}
709 1202
710static void 1203inline void
711wlist_del (WL *head, WL elem) 1204wlist_del (WL *head, WL elem)
712{ 1205{
713 while (*head) 1206 while (*head)
714 { 1207 {
715 if (*head == elem) 1208 if (*head == elem)
720 1213
721 head = &(*head)->next; 1214 head = &(*head)->next;
722 } 1215 }
723} 1216}
724 1217
725static void 1218inline void
726ev_clear (W w) 1219ev_clear_pending (EV_P_ W w)
727{ 1220{
728 if (w->pending) 1221 if (w->pending)
729 { 1222 {
730 pendings [w->pending - 1].w = 0; 1223 pendings [ABSPRI (w)][w->pending - 1].w = 0;
731 w->pending = 0; 1224 w->pending = 0;
732 } 1225 }
733} 1226}
734 1227
735static void 1228inline void
736ev_start (W w, int active) 1229ev_start (EV_P_ W w, int active)
737{ 1230{
1231 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
1232 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1233
738 w->active = active; 1234 w->active = active;
1235 ev_ref (EV_A);
739} 1236}
740 1237
741static void 1238inline void
742ev_stop (W w) 1239ev_stop (EV_P_ W w)
743{ 1240{
1241 ev_unref (EV_A);
744 w->active = 0; 1242 w->active = 0;
745} 1243}
746 1244
747/*****************************************************************************/ 1245/*****************************************************************************/
748 1246
749void 1247void
750ev_io_start (struct ev_io *w) 1248ev_io_start (EV_P_ struct ev_io *w)
751{ 1249{
1250 int fd = w->fd;
1251
752 if (ev_is_active (w)) 1252 if (ev_is_active (w))
753 return; 1253 return;
754 1254
755 int fd = w->fd; 1255 assert (("ev_io_start called with negative fd", fd >= 0));
756 1256
757 ev_start ((W)w, 1); 1257 ev_start (EV_A_ (W)w, 1);
758 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1258 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
759 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1259 wlist_add ((WL *)&anfds[fd].head, (WL)w);
760 1260
761 fd_change (fd); 1261 fd_change (EV_A_ fd);
762} 1262}
763 1263
764void 1264void
765ev_io_stop (struct ev_io *w) 1265ev_io_stop (EV_P_ struct ev_io *w)
766{ 1266{
767 ev_clear ((W)w); 1267 ev_clear_pending (EV_A_ (W)w);
768 if (!ev_is_active (w)) 1268 if (!ev_is_active (w))
769 return; 1269 return;
770 1270
771 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1271 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
772 ev_stop ((W)w); 1272 ev_stop (EV_A_ (W)w);
773 1273
774 fd_change (w->fd); 1274 fd_change (EV_A_ w->fd);
775} 1275}
776 1276
777void 1277void
778ev_timer_start (struct ev_timer *w) 1278ev_timer_start (EV_P_ struct ev_timer *w)
779{ 1279{
780 if (ev_is_active (w)) 1280 if (ev_is_active (w))
781 return; 1281 return;
782 1282
783 w->at += now; 1283 ((WT)w)->at += mn_now;
784 1284
785 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 1285 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
786 1286
787 ev_start ((W)w, ++timercnt); 1287 ev_start (EV_A_ (W)w, ++timercnt);
788 array_needsize (timers, timermax, timercnt, ); 1288 array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
789 timers [timercnt - 1] = w; 1289 timers [timercnt - 1] = w;
790 upheap ((WT *)timers, timercnt - 1); 1290 upheap ((WT *)timers, timercnt - 1);
791}
792 1291
1292 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1293}
1294
793void 1295void
794ev_timer_stop (struct ev_timer *w) 1296ev_timer_stop (EV_P_ struct ev_timer *w)
795{ 1297{
796 ev_clear ((W)w); 1298 ev_clear_pending (EV_A_ (W)w);
797 if (!ev_is_active (w)) 1299 if (!ev_is_active (w))
798 return; 1300 return;
799 1301
1302 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1303
800 if (w->active < timercnt--) 1304 if (((W)w)->active < timercnt--)
801 { 1305 {
802 timers [w->active - 1] = timers [timercnt]; 1306 timers [((W)w)->active - 1] = timers [timercnt];
803 downheap ((WT *)timers, timercnt, w->active - 1); 1307 downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
804 } 1308 }
805 1309
806 w->at = w->repeat; 1310 ((WT)w)->at = w->repeat;
807 1311
808 ev_stop ((W)w); 1312 ev_stop (EV_A_ (W)w);
809} 1313}
810 1314
811void 1315void
812ev_timer_again (struct ev_timer *w) 1316ev_timer_again (EV_P_ struct ev_timer *w)
813{ 1317{
814 if (ev_is_active (w)) 1318 if (ev_is_active (w))
815 { 1319 {
816 if (w->repeat) 1320 if (w->repeat)
817 { 1321 {
818 w->at = now + w->repeat; 1322 ((WT)w)->at = mn_now + w->repeat;
819 downheap ((WT *)timers, timercnt, w->active - 1); 1323 downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
820 } 1324 }
821 else 1325 else
822 ev_timer_stop (w); 1326 ev_timer_stop (EV_A_ w);
823 } 1327 }
824 else if (w->repeat) 1328 else if (w->repeat)
825 ev_timer_start (w); 1329 ev_timer_start (EV_A_ w);
826} 1330}
827 1331
828void 1332void
829ev_periodic_start (struct ev_periodic *w) 1333ev_periodic_start (EV_P_ struct ev_periodic *w)
830{ 1334{
831 if (ev_is_active (w)) 1335 if (ev_is_active (w))
832 return; 1336 return;
833 1337
834 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 1338 if (w->reschedule_cb)
835 1339 ((WT)w)->at = w->reschedule_cb (w, rt_now);
1340 else if (w->interval)
1341 {
1342 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
836 /* this formula differs from the one in periodic_reify because we do not always round up */ 1343 /* this formula differs from the one in periodic_reify because we do not always round up */
837 if (w->interval)
838 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 1344 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
1345 }
839 1346
840 ev_start ((W)w, ++periodiccnt); 1347 ev_start (EV_A_ (W)w, ++periodiccnt);
841 array_needsize (periodics, periodicmax, periodiccnt, ); 1348 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
842 periodics [periodiccnt - 1] = w; 1349 periodics [periodiccnt - 1] = w;
843 upheap ((WT *)periodics, periodiccnt - 1); 1350 upheap ((WT *)periodics, periodiccnt - 1);
844}
845 1351
1352 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1353}
1354
846void 1355void
847ev_periodic_stop (struct ev_periodic *w) 1356ev_periodic_stop (EV_P_ struct ev_periodic *w)
848{ 1357{
849 ev_clear ((W)w); 1358 ev_clear_pending (EV_A_ (W)w);
850 if (!ev_is_active (w)) 1359 if (!ev_is_active (w))
851 return; 1360 return;
852 1361
1362 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1363
853 if (w->active < periodiccnt--) 1364 if (((W)w)->active < periodiccnt--)
854 { 1365 {
855 periodics [w->active - 1] = periodics [periodiccnt]; 1366 periodics [((W)w)->active - 1] = periodics [periodiccnt];
856 downheap ((WT *)periodics, periodiccnt, w->active - 1); 1367 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
857 } 1368 }
858 1369
859 ev_stop ((W)w); 1370 ev_stop (EV_A_ (W)w);
860} 1371}
861 1372
862void 1373void
1374ev_periodic_again (EV_P_ struct ev_periodic *w)
1375{
1376 ev_periodic_stop (EV_A_ w);
1377 ev_periodic_start (EV_A_ w);
1378}
1379
1380void
863ev_signal_start (struct ev_signal *w) 1381ev_idle_start (EV_P_ struct ev_idle *w)
864{ 1382{
865 if (ev_is_active (w)) 1383 if (ev_is_active (w))
866 return; 1384 return;
867 1385
1386 ev_start (EV_A_ (W)w, ++idlecnt);
1387 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1388 idles [idlecnt - 1] = w;
1389}
1390
1391void
1392ev_idle_stop (EV_P_ struct ev_idle *w)
1393{
1394 ev_clear_pending (EV_A_ (W)w);
1395 if (ev_is_active (w))
1396 return;
1397
1398 idles [((W)w)->active - 1] = idles [--idlecnt];
1399 ev_stop (EV_A_ (W)w);
1400}
1401
1402void
1403ev_prepare_start (EV_P_ struct ev_prepare *w)
1404{
1405 if (ev_is_active (w))
1406 return;
1407
1408 ev_start (EV_A_ (W)w, ++preparecnt);
1409 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1410 prepares [preparecnt - 1] = w;
1411}
1412
1413void
1414ev_prepare_stop (EV_P_ struct ev_prepare *w)
1415{
1416 ev_clear_pending (EV_A_ (W)w);
1417 if (ev_is_active (w))
1418 return;
1419
1420 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1421 ev_stop (EV_A_ (W)w);
1422}
1423
1424void
1425ev_check_start (EV_P_ struct ev_check *w)
1426{
1427 if (ev_is_active (w))
1428 return;
1429
1430 ev_start (EV_A_ (W)w, ++checkcnt);
1431 array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1432 checks [checkcnt - 1] = w;
1433}
1434
1435void
1436ev_check_stop (EV_P_ struct ev_check *w)
1437{
1438 ev_clear_pending (EV_A_ (W)w);
1439 if (ev_is_active (w))
1440 return;
1441
1442 checks [((W)w)->active - 1] = checks [--checkcnt];
1443 ev_stop (EV_A_ (W)w);
1444}
1445
1446#ifndef SA_RESTART
1447# define SA_RESTART 0
1448#endif
1449
1450void
1451ev_signal_start (EV_P_ struct ev_signal *w)
1452{
1453#if EV_MULTIPLICITY
1454 assert (("signal watchers are only supported in the default loop", loop == default_loop));
1455#endif
1456 if (ev_is_active (w))
1457 return;
1458
1459 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1460
868 ev_start ((W)w, 1); 1461 ev_start (EV_A_ (W)w, 1);
869 array_needsize (signals, signalmax, w->signum, signals_init); 1462 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
870 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 1463 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
871 1464
872 if (!w->next) 1465 if (!((WL)w)->next)
873 { 1466 {
1467#if WIN32
1468 signal (w->signum, sighandler);
1469#else
874 struct sigaction sa; 1470 struct sigaction sa;
875 sa.sa_handler = sighandler; 1471 sa.sa_handler = sighandler;
876 sigfillset (&sa.sa_mask); 1472 sigfillset (&sa.sa_mask);
877 sa.sa_flags = 0; 1473 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
878 sigaction (w->signum, &sa, 0); 1474 sigaction (w->signum, &sa, 0);
1475#endif
879 } 1476 }
880} 1477}
881 1478
882void 1479void
883ev_signal_stop (struct ev_signal *w) 1480ev_signal_stop (EV_P_ struct ev_signal *w)
884{ 1481{
885 ev_clear ((W)w); 1482 ev_clear_pending (EV_A_ (W)w);
886 if (!ev_is_active (w)) 1483 if (!ev_is_active (w))
887 return; 1484 return;
888 1485
889 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 1486 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
890 ev_stop ((W)w); 1487 ev_stop (EV_A_ (W)w);
891 1488
892 if (!signals [w->signum - 1].head) 1489 if (!signals [w->signum - 1].head)
893 signal (w->signum, SIG_DFL); 1490 signal (w->signum, SIG_DFL);
894} 1491}
895 1492
896void 1493void
897ev_idle_start (struct ev_idle *w) 1494ev_child_start (EV_P_ struct ev_child *w)
898{ 1495{
1496#if EV_MULTIPLICITY
1497 assert (("child watchers are only supported in the default loop", loop == default_loop));
1498#endif
899 if (ev_is_active (w)) 1499 if (ev_is_active (w))
900 return; 1500 return;
901 1501
902 ev_start ((W)w, ++idlecnt); 1502 ev_start (EV_A_ (W)w, 1);
903 array_needsize (idles, idlemax, idlecnt, ); 1503 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
904 idles [idlecnt - 1] = w;
905} 1504}
906 1505
907void 1506void
908ev_idle_stop (struct ev_idle *w) 1507ev_child_stop (EV_P_ struct ev_child *w)
909{ 1508{
910 ev_clear ((W)w); 1509 ev_clear_pending (EV_A_ (W)w);
911 if (ev_is_active (w)) 1510 if (ev_is_active (w))
912 return; 1511 return;
913 1512
914 idles [w->active - 1] = idles [--idlecnt];
915 ev_stop ((W)w);
916}
917
918void
919ev_prepare_start (struct ev_prepare *w)
920{
921 if (ev_is_active (w))
922 return;
923
924 ev_start ((W)w, ++preparecnt);
925 array_needsize (prepares, preparemax, preparecnt, );
926 prepares [preparecnt - 1] = w;
927}
928
929void
930ev_prepare_stop (struct ev_prepare *w)
931{
932 ev_clear ((W)w);
933 if (ev_is_active (w))
934 return;
935
936 prepares [w->active - 1] = prepares [--preparecnt];
937 ev_stop ((W)w);
938}
939
940void
941ev_check_start (struct ev_check *w)
942{
943 if (ev_is_active (w))
944 return;
945
946 ev_start ((W)w, ++checkcnt);
947 array_needsize (checks, checkmax, checkcnt, );
948 checks [checkcnt - 1] = w;
949}
950
951void
952ev_check_stop (struct ev_check *w)
953{
954 ev_clear ((W)w);
955 if (ev_is_active (w))
956 return;
957
958 checks [w->active - 1] = checks [--checkcnt];
959 ev_stop ((W)w);
960}
961
962void
963ev_child_start (struct ev_child *w)
964{
965 if (ev_is_active (w))
966 return;
967
968 ev_start ((W)w, 1);
969 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
970}
971
972void
973ev_child_stop (struct ev_child *w)
974{
975 ev_clear ((W)w);
976 if (ev_is_active (w))
977 return;
978
979 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 1513 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
980 ev_stop ((W)w); 1514 ev_stop (EV_A_ (W)w);
981} 1515}
982 1516
983/*****************************************************************************/ 1517/*****************************************************************************/
984 1518
985struct ev_once 1519struct ev_once
989 void (*cb)(int revents, void *arg); 1523 void (*cb)(int revents, void *arg);
990 void *arg; 1524 void *arg;
991}; 1525};
992 1526
993static void 1527static void
994once_cb (struct ev_once *once, int revents) 1528once_cb (EV_P_ struct ev_once *once, int revents)
995{ 1529{
996 void (*cb)(int revents, void *arg) = once->cb; 1530 void (*cb)(int revents, void *arg) = once->cb;
997 void *arg = once->arg; 1531 void *arg = once->arg;
998 1532
999 ev_io_stop (&once->io); 1533 ev_io_stop (EV_A_ &once->io);
1000 ev_timer_stop (&once->to); 1534 ev_timer_stop (EV_A_ &once->to);
1001 free (once); 1535 ev_free (once);
1002 1536
1003 cb (revents, arg); 1537 cb (revents, arg);
1004} 1538}
1005 1539
1006static void 1540static void
1007once_cb_io (struct ev_io *w, int revents) 1541once_cb_io (EV_P_ struct ev_io *w, int revents)
1008{ 1542{
1009 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 1543 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1010} 1544}
1011 1545
1012static void 1546static void
1013once_cb_to (struct ev_timer *w, int revents) 1547once_cb_to (EV_P_ struct ev_timer *w, int revents)
1014{ 1548{
1015 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 1549 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1016} 1550}
1017 1551
1018void 1552void
1019ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 1553ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1020{ 1554{
1021 struct ev_once *once = malloc (sizeof (struct ev_once)); 1555 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1022 1556
1023 if (!once) 1557 if (!once)
1024 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 1558 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1025 else 1559 else
1026 { 1560 {
1029 1563
1030 ev_watcher_init (&once->io, once_cb_io); 1564 ev_watcher_init (&once->io, once_cb_io);
1031 if (fd >= 0) 1565 if (fd >= 0)
1032 { 1566 {
1033 ev_io_set (&once->io, fd, events); 1567 ev_io_set (&once->io, fd, events);
1034 ev_io_start (&once->io); 1568 ev_io_start (EV_A_ &once->io);
1035 } 1569 }
1036 1570
1037 ev_watcher_init (&once->to, once_cb_to); 1571 ev_watcher_init (&once->to, once_cb_to);
1038 if (timeout >= 0.) 1572 if (timeout >= 0.)
1039 { 1573 {
1040 ev_timer_set (&once->to, timeout, 0.); 1574 ev_timer_set (&once->to, timeout, 0.);
1041 ev_timer_start (&once->to); 1575 ev_timer_start (EV_A_ &once->to);
1042 } 1576 }
1043 } 1577 }
1044} 1578}
1045 1579
1046/*****************************************************************************/
1047
1048#if 0
1049
1050struct ev_io wio;
1051
1052static void
1053sin_cb (struct ev_io *w, int revents)
1054{
1055 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1056}
1057
1058static void
1059ocb (struct ev_timer *w, int revents)
1060{
1061 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1062 ev_timer_stop (w);
1063 ev_timer_start (w);
1064}
1065
1066static void
1067scb (struct ev_signal *w, int revents)
1068{
1069 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1070 ev_io_stop (&wio);
1071 ev_io_start (&wio);
1072}
1073
1074static void
1075gcb (struct ev_signal *w, int revents)
1076{
1077 fprintf (stderr, "generic %x\n", revents);
1078
1079}
1080
1081int main (void)
1082{
1083 ev_init (0);
1084
1085 ev_io_init (&wio, sin_cb, 0, EV_READ);
1086 ev_io_start (&wio);
1087
1088 struct ev_timer t[10000];
1089
1090#if 0
1091 int i;
1092 for (i = 0; i < 10000; ++i)
1093 {
1094 struct ev_timer *w = t + i;
1095 ev_watcher_init (w, ocb, i);
1096 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1097 ev_timer_start (w);
1098 if (drand48 () < 0.5)
1099 ev_timer_stop (w);
1100 }
1101#endif
1102
1103 struct ev_timer t1;
1104 ev_timer_init (&t1, ocb, 5, 10);
1105 ev_timer_start (&t1);
1106
1107 struct ev_signal sig;
1108 ev_signal_init (&sig, scb, SIGQUIT);
1109 ev_signal_start (&sig);
1110
1111 struct ev_check cw;
1112 ev_check_init (&cw, gcb);
1113 ev_check_start (&cw);
1114
1115 struct ev_idle iw;
1116 ev_idle_init (&iw, gcb);
1117 ev_idle_start (&iw);
1118
1119 ev_loop (0);
1120
1121 return 0;
1122}
1123
1124#endif
1125
1126
1127
1128

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