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Comparing libev/ev.c (file contents):
Revision 1.45 by root, Sat Nov 3 09:19:58 2007 UTC vs.
Revision 1.162 by root, Mon Dec 3 13:41:24 2007 UTC

26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (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
29 * 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.
30 */ 30 */
31
32#ifdef __cplusplus
33extern "C" {
34#endif
35
36#ifndef EV_STANDALONE
31#if EV_USE_CONFIG_H 37# ifdef EV_CONFIG_H
38# include EV_CONFIG_H
39# else
32# include "config.h" 40# include "config.h"
41# endif
42
43# if HAVE_CLOCK_GETTIME
44# ifndef EV_USE_MONOTONIC
45# define EV_USE_MONOTONIC 1
46# endif
47# ifndef EV_USE_REALTIME
48# define EV_USE_REALTIME 1
49# endif
50# else
51# ifndef EV_USE_MONOTONIC
52# define EV_USE_MONOTONIC 0
53# endif
54# ifndef EV_USE_REALTIME
55# define EV_USE_REALTIME 0
56# endif
57# endif
58
59# ifndef EV_USE_SELECT
60# if HAVE_SELECT && HAVE_SYS_SELECT_H
61# define EV_USE_SELECT 1
62# else
63# define EV_USE_SELECT 0
64# endif
65# endif
66
67# ifndef EV_USE_POLL
68# if HAVE_POLL && HAVE_POLL_H
69# define EV_USE_POLL 1
70# else
71# define EV_USE_POLL 0
72# endif
73# endif
74
75# ifndef EV_USE_EPOLL
76# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
77# define EV_USE_EPOLL 1
78# else
79# define EV_USE_EPOLL 0
80# endif
81# endif
82
83# ifndef EV_USE_KQUEUE
84# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
85# define EV_USE_KQUEUE 1
86# else
87# define EV_USE_KQUEUE 0
88# endif
89# endif
90
91# ifndef EV_USE_PORT
92# if HAVE_PORT_H && HAVE_PORT_CREATE
93# define EV_USE_PORT 1
94# else
95# define EV_USE_PORT 0
96# endif
97# endif
98
99# ifndef EV_USE_INOTIFY
100# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
101# define EV_USE_INOTIFY 1
102# else
103# define EV_USE_INOTIFY 0
104# endif
105# endif
106
33#endif 107#endif
34 108
35#include <math.h> 109#include <math.h>
36#include <stdlib.h> 110#include <stdlib.h>
37#include <unistd.h>
38#include <fcntl.h> 111#include <fcntl.h>
39#include <signal.h>
40#include <stddef.h> 112#include <stddef.h>
41 113
42#include <stdio.h> 114#include <stdio.h>
43 115
44#include <assert.h> 116#include <assert.h>
45#include <errno.h> 117#include <errno.h>
46#include <sys/types.h> 118#include <sys/types.h>
119#include <time.h>
120
121#include <signal.h>
122
123#ifdef EV_H
124# include EV_H
125#else
126# include "ev.h"
127#endif
128
47#ifndef WIN32 129#ifndef _WIN32
130# include <sys/time.h>
48# include <sys/wait.h> 131# include <sys/wait.h>
132# include <unistd.h>
133#else
134# define WIN32_LEAN_AND_MEAN
135# include <windows.h>
136# ifndef EV_SELECT_IS_WINSOCKET
137# define EV_SELECT_IS_WINSOCKET 1
49#endif 138# endif
50#include <sys/time.h> 139#endif
51#include <time.h>
52 140
53/**/ 141/**/
54 142
55#ifndef EV_USE_MONOTONIC 143#ifndef EV_USE_MONOTONIC
56# define EV_USE_MONOTONIC 1 144# define EV_USE_MONOTONIC 0
145#endif
146
147#ifndef EV_USE_REALTIME
148# define EV_USE_REALTIME 0
57#endif 149#endif
58 150
59#ifndef EV_USE_SELECT 151#ifndef EV_USE_SELECT
60# define EV_USE_SELECT 1 152# define EV_USE_SELECT 1
61#endif 153#endif
62 154
63#ifndef EV_USE_POLL 155#ifndef EV_USE_POLL
64# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ 156# ifdef _WIN32
157# define EV_USE_POLL 0
158# else
159# define EV_USE_POLL 1
160# endif
65#endif 161#endif
66 162
67#ifndef EV_USE_EPOLL 163#ifndef EV_USE_EPOLL
68# define EV_USE_EPOLL 0 164# define EV_USE_EPOLL 0
69#endif 165#endif
70 166
71#ifndef EV_USE_KQUEUE 167#ifndef EV_USE_KQUEUE
72# define EV_USE_KQUEUE 0 168# define EV_USE_KQUEUE 0
73#endif 169#endif
74 170
75#ifndef EV_USE_REALTIME 171#ifndef EV_USE_PORT
76# define EV_USE_REALTIME 1 172# define EV_USE_PORT 0
173#endif
174
175#ifndef EV_USE_INOTIFY
176# define EV_USE_INOTIFY 0
177#endif
178
179#ifndef EV_PID_HASHSIZE
180# if EV_MINIMAL
181# define EV_PID_HASHSIZE 1
182# else
183# define EV_PID_HASHSIZE 16
184# endif
185#endif
186
187#ifndef EV_INOTIFY_HASHSIZE
188# if EV_MINIMAL
189# define EV_INOTIFY_HASHSIZE 1
190# else
191# define EV_INOTIFY_HASHSIZE 16
192# endif
77#endif 193#endif
78 194
79/**/ 195/**/
80 196
81#ifndef CLOCK_MONOTONIC 197#ifndef CLOCK_MONOTONIC
86#ifndef CLOCK_REALTIME 202#ifndef CLOCK_REALTIME
87# undef EV_USE_REALTIME 203# undef EV_USE_REALTIME
88# define EV_USE_REALTIME 0 204# define EV_USE_REALTIME 0
89#endif 205#endif
90 206
207#if EV_SELECT_IS_WINSOCKET
208# include <winsock.h>
209#endif
210
211#if !EV_STAT_ENABLE
212# define EV_USE_INOTIFY 0
213#endif
214
215#if EV_USE_INOTIFY
216# include <sys/inotify.h>
217#endif
218
91/**/ 219/**/
92 220
93#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 221#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
94#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 222#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
95#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
96/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ 223/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
97
98#include "ev.h"
99 224
100#if __GNUC__ >= 3 225#if __GNUC__ >= 3
101# define expect(expr,value) __builtin_expect ((expr),(value)) 226# define expect(expr,value) __builtin_expect ((expr),(value))
227# define inline_size static inline /* inline for codesize */
228# if EV_MINIMAL
102# define inline inline 229# define noinline __attribute__ ((noinline))
230# define inline_speed static noinline
231# else
232# define noinline
233# define inline_speed static inline
234# endif
103#else 235#else
104# define expect(expr,value) (expr) 236# define expect(expr,value) (expr)
237# define inline_speed static
105# define inline static 238# define inline_size static
239# define noinline
106#endif 240#endif
107 241
108#define expect_false(expr) expect ((expr) != 0, 0) 242#define expect_false(expr) expect ((expr) != 0, 0)
109#define expect_true(expr) expect ((expr) != 0, 1) 243#define expect_true(expr) expect ((expr) != 0, 1)
110 244
111#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 245#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
112#define ABSPRI(w) ((w)->priority - EV_MINPRI) 246#define ABSPRI(w) ((w)->priority - EV_MINPRI)
113 247
248#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
249#define EMPTY2(a,b) /* used to suppress some warnings */
250
114typedef struct ev_watcher *W; 251typedef ev_watcher *W;
115typedef struct ev_watcher_list *WL; 252typedef ev_watcher_list *WL;
116typedef struct ev_watcher_time *WT; 253typedef ev_watcher_time *WT;
117 254
118static ev_tstamp now_floor, now, diff; /* monotonic clock */ 255static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
256
257#ifdef _WIN32
258# include "ev_win32.c"
259#endif
260
261/*****************************************************************************/
262
263static void (*syserr_cb)(const char *msg);
264
265void
266ev_set_syserr_cb (void (*cb)(const char *msg))
267{
268 syserr_cb = cb;
269}
270
271static void noinline
272syserr (const char *msg)
273{
274 if (!msg)
275 msg = "(libev) system error";
276
277 if (syserr_cb)
278 syserr_cb (msg);
279 else
280 {
281 perror (msg);
282 abort ();
283 }
284}
285
286static void *(*alloc)(void *ptr, long size);
287
288void
289ev_set_allocator (void *(*cb)(void *ptr, long size))
290{
291 alloc = cb;
292}
293
294inline_speed void *
295ev_realloc (void *ptr, long size)
296{
297 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
298
299 if (!ptr && size)
300 {
301 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
302 abort ();
303 }
304
305 return ptr;
306}
307
308#define ev_malloc(size) ev_realloc (0, (size))
309#define ev_free(ptr) ev_realloc ((ptr), 0)
310
311/*****************************************************************************/
312
313typedef struct
314{
315 WL head;
316 unsigned char events;
317 unsigned char reify;
318#if EV_SELECT_IS_WINSOCKET
319 SOCKET handle;
320#endif
321} ANFD;
322
323typedef struct
324{
325 W w;
326 int events;
327} ANPENDING;
328
329#if EV_USE_INOTIFY
330typedef struct
331{
332 WL head;
333} ANFS;
334#endif
335
336#if EV_MULTIPLICITY
337
338 struct ev_loop
339 {
340 ev_tstamp ev_rt_now;
341 #define ev_rt_now ((loop)->ev_rt_now)
342 #define VAR(name,decl) decl;
343 #include "ev_vars.h"
344 #undef VAR
345 };
346 #include "ev_wrap.h"
347
348 static struct ev_loop default_loop_struct;
349 struct ev_loop *ev_default_loop_ptr;
350
351#else
352
119ev_tstamp ev_now; 353 ev_tstamp ev_rt_now;
120int ev_method; 354 #define VAR(name,decl) static decl;
355 #include "ev_vars.h"
356 #undef VAR
121 357
122static int have_monotonic; /* runtime */ 358 static int ev_default_loop_ptr;
123 359
124static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 360#endif
125static void (*method_modify)(int fd, int oev, int nev);
126static void (*method_poll)(ev_tstamp timeout);
127 361
128/*****************************************************************************/ 362/*****************************************************************************/
129 363
130ev_tstamp 364ev_tstamp
131ev_time (void) 365ev_time (void)
139 gettimeofday (&tv, 0); 373 gettimeofday (&tv, 0);
140 return tv.tv_sec + tv.tv_usec * 1e-6; 374 return tv.tv_sec + tv.tv_usec * 1e-6;
141#endif 375#endif
142} 376}
143 377
144static ev_tstamp 378ev_tstamp inline_size
145get_clock (void) 379get_clock (void)
146{ 380{
147#if EV_USE_MONOTONIC 381#if EV_USE_MONOTONIC
148 if (expect_true (have_monotonic)) 382 if (expect_true (have_monotonic))
149 { 383 {
154#endif 388#endif
155 389
156 return ev_time (); 390 return ev_time ();
157} 391}
158 392
393#if EV_MULTIPLICITY
394ev_tstamp
395ev_now (EV_P)
396{
397 return ev_rt_now;
398}
399#endif
400
159#define array_roundsize(base,n) ((n) | 4 & ~3) 401#define array_roundsize(type,n) (((n) | 4) & ~3)
160 402
161#define array_needsize(base,cur,cnt,init) \ 403#define array_needsize(type,base,cur,cnt,init) \
162 if (expect_false ((cnt) > cur)) \ 404 if (expect_false ((cnt) > cur)) \
163 { \ 405 { \
164 int newcnt = cur; \ 406 int newcnt = cur; \
165 do \ 407 do \
166 { \ 408 { \
167 newcnt = array_roundsize (base, newcnt << 1); \ 409 newcnt = array_roundsize (type, newcnt << 1); \
168 } \ 410 } \
169 while ((cnt) > newcnt); \ 411 while ((cnt) > newcnt); \
170 \ 412 \
171 base = realloc (base, sizeof (*base) * (newcnt)); \ 413 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
172 init (base + cur, newcnt - cur); \ 414 init (base + cur, newcnt - cur); \
173 cur = newcnt; \ 415 cur = newcnt; \
174 } 416 }
417
418#define array_slim(type,stem) \
419 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
420 { \
421 stem ## max = array_roundsize (stem ## cnt >> 1); \
422 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
423 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
424 }
425
426#define array_free(stem, idx) \
427 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
175 428
176/*****************************************************************************/ 429/*****************************************************************************/
177 430
178typedef struct 431void noinline
432ev_feed_event (EV_P_ void *w, int revents)
179{ 433{
180 struct ev_io *head; 434 W w_ = (W)w;
181 unsigned char events;
182 unsigned char reify;
183} ANFD;
184 435
185static ANFD *anfds; 436 if (expect_false (w_->pending))
186static int anfdmax; 437 {
438 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
439 return;
440 }
187 441
188static void 442 w_->pending = ++pendingcnt [ABSPRI (w_)];
443 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
444 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
445 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
446}
447
448void inline_size
449queue_events (EV_P_ W *events, int eventcnt, int type)
450{
451 int i;
452
453 for (i = 0; i < eventcnt; ++i)
454 ev_feed_event (EV_A_ events [i], type);
455}
456
457/*****************************************************************************/
458
459void inline_size
189anfds_init (ANFD *base, int count) 460anfds_init (ANFD *base, int count)
190{ 461{
191 while (count--) 462 while (count--)
192 { 463 {
193 base->head = 0; 464 base->head = 0;
196 467
197 ++base; 468 ++base;
198 } 469 }
199} 470}
200 471
201typedef struct 472void inline_speed
202{
203 W w;
204 int events;
205} ANPENDING;
206
207static ANPENDING *pendings [NUMPRI];
208static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
209
210static void
211event (W w, int events)
212{
213 if (w->pending)
214 {
215 pendings [ABSPRI (w)][w->pending - 1].events |= events;
216 return;
217 }
218
219 w->pending = ++pendingcnt [ABSPRI (w)];
220 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
221 pendings [ABSPRI (w)][w->pending - 1].w = w;
222 pendings [ABSPRI (w)][w->pending - 1].events = events;
223}
224
225static void
226queue_events (W *events, int eventcnt, int type)
227{
228 int i;
229
230 for (i = 0; i < eventcnt; ++i)
231 event (events [i], type);
232}
233
234static void
235fd_event (int fd, int events) 473fd_event (EV_P_ int fd, int revents)
236{ 474{
237 ANFD *anfd = anfds + fd; 475 ANFD *anfd = anfds + fd;
238 struct ev_io *w; 476 ev_io *w;
239 477
240 for (w = anfd->head; w; w = w->next) 478 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
241 { 479 {
242 int ev = w->events & events; 480 int ev = w->events & revents;
243 481
244 if (ev) 482 if (ev)
245 event ((W)w, ev); 483 ev_feed_event (EV_A_ (W)w, ev);
246 } 484 }
247} 485}
248 486
249/*****************************************************************************/ 487void
488ev_feed_fd_event (EV_P_ int fd, int revents)
489{
490 fd_event (EV_A_ fd, revents);
491}
250 492
251static int *fdchanges; 493void inline_size
252static int fdchangemax, fdchangecnt; 494fd_reify (EV_P)
253
254static void
255fd_reify (void)
256{ 495{
257 int i; 496 int i;
258 497
259 for (i = 0; i < fdchangecnt; ++i) 498 for (i = 0; i < fdchangecnt; ++i)
260 { 499 {
261 int fd = fdchanges [i]; 500 int fd = fdchanges [i];
262 ANFD *anfd = anfds + fd; 501 ANFD *anfd = anfds + fd;
263 struct ev_io *w; 502 ev_io *w;
264 503
265 int events = 0; 504 int events = 0;
266 505
267 for (w = anfd->head; w; w = w->next) 506 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
268 events |= w->events; 507 events |= w->events;
269 508
509#if EV_SELECT_IS_WINSOCKET
510 if (events)
511 {
512 unsigned long argp;
513 anfd->handle = _get_osfhandle (fd);
514 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
515 }
516#endif
517
270 anfd->reify = 0; 518 anfd->reify = 0;
271 519
272 if (anfd->events != events)
273 {
274 method_modify (fd, anfd->events, events); 520 backend_modify (EV_A_ fd, anfd->events, events);
275 anfd->events = events; 521 anfd->events = events;
276 }
277 } 522 }
278 523
279 fdchangecnt = 0; 524 fdchangecnt = 0;
280} 525}
281 526
282static void 527void inline_size
283fd_change (int fd) 528fd_change (EV_P_ int fd)
284{ 529{
285 if (anfds [fd].reify || fdchangecnt < 0) 530 if (expect_false (anfds [fd].reify))
286 return; 531 return;
287 532
288 anfds [fd].reify = 1; 533 anfds [fd].reify = 1;
289 534
290 ++fdchangecnt; 535 ++fdchangecnt;
291 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 536 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
292 fdchanges [fdchangecnt - 1] = fd; 537 fdchanges [fdchangecnt - 1] = fd;
293} 538}
294 539
295static void 540void inline_speed
296fd_kill (int fd) 541fd_kill (EV_P_ int fd)
297{ 542{
298 struct ev_io *w; 543 ev_io *w;
299 544
300 printf ("killing fd %d\n", fd);//D
301 while ((w = anfds [fd].head)) 545 while ((w = (ev_io *)anfds [fd].head))
302 { 546 {
303 ev_io_stop (w); 547 ev_io_stop (EV_A_ w);
304 event ((W)w, EV_ERROR | EV_READ | EV_WRITE); 548 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
305 } 549 }
550}
551
552int inline_size
553fd_valid (int fd)
554{
555#ifdef _WIN32
556 return _get_osfhandle (fd) != -1;
557#else
558 return fcntl (fd, F_GETFD) != -1;
559#endif
306} 560}
307 561
308/* called on EBADF to verify fds */ 562/* called on EBADF to verify fds */
309static void 563static void noinline
310fd_ebadf (void) 564fd_ebadf (EV_P)
311{ 565{
312 int fd; 566 int fd;
313 567
314 for (fd = 0; fd < anfdmax; ++fd) 568 for (fd = 0; fd < anfdmax; ++fd)
315 if (anfds [fd].events) 569 if (anfds [fd].events)
316 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 570 if (!fd_valid (fd) == -1 && errno == EBADF)
317 fd_kill (fd); 571 fd_kill (EV_A_ fd);
318} 572}
319 573
320/* called on ENOMEM in select/poll to kill some fds and retry */ 574/* called on ENOMEM in select/poll to kill some fds and retry */
321static void 575static void noinline
322fd_enomem (void) 576fd_enomem (EV_P)
323{ 577{
324 int fd = anfdmax; 578 int fd;
325 579
326 while (fd--) 580 for (fd = anfdmax; fd--; )
327 if (anfds [fd].events) 581 if (anfds [fd].events)
328 { 582 {
329 close (fd);
330 fd_kill (fd); 583 fd_kill (EV_A_ fd);
331 return; 584 return;
332 } 585 }
333} 586}
334 587
588/* usually called after fork if backend needs to re-arm all fds from scratch */
589static void noinline
590fd_rearm_all (EV_P)
591{
592 int fd;
593
594 for (fd = 0; fd < anfdmax; ++fd)
595 if (anfds [fd].events)
596 {
597 anfds [fd].events = 0;
598 fd_change (EV_A_ fd);
599 }
600}
601
335/*****************************************************************************/ 602/*****************************************************************************/
336 603
337static struct ev_timer **timers; 604void inline_speed
338static int timermax, timercnt;
339
340static struct ev_periodic **periodics;
341static int periodicmax, periodiccnt;
342
343static void
344upheap (WT *timers, int k) 605upheap (WT *heap, int k)
345{ 606{
346 WT w = timers [k]; 607 WT w = heap [k];
347 608
348 while (k && timers [k >> 1]->at > w->at) 609 while (k && heap [k >> 1]->at > w->at)
349 { 610 {
350 timers [k] = timers [k >> 1]; 611 heap [k] = heap [k >> 1];
351 timers [k]->active = k + 1; 612 ((W)heap [k])->active = k + 1;
352 k >>= 1; 613 k >>= 1;
353 } 614 }
354 615
355 timers [k] = w; 616 heap [k] = w;
356 timers [k]->active = k + 1; 617 ((W)heap [k])->active = k + 1;
357 618
358} 619}
359 620
360static void 621void inline_speed
361downheap (WT *timers, int N, int k) 622downheap (WT *heap, int N, int k)
362{ 623{
363 WT w = timers [k]; 624 WT w = heap [k];
364 625
365 while (k < (N >> 1)) 626 while (k < (N >> 1))
366 { 627 {
367 int j = k << 1; 628 int j = k << 1;
368 629
369 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 630 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
370 ++j; 631 ++j;
371 632
372 if (w->at <= timers [j]->at) 633 if (w->at <= heap [j]->at)
373 break; 634 break;
374 635
375 timers [k] = timers [j]; 636 heap [k] = heap [j];
376 timers [k]->active = k + 1; 637 ((W)heap [k])->active = k + 1;
377 k = j; 638 k = j;
378 } 639 }
379 640
380 timers [k] = w; 641 heap [k] = w;
381 timers [k]->active = k + 1; 642 ((W)heap [k])->active = k + 1;
643}
644
645void inline_size
646adjustheap (WT *heap, int N, int k)
647{
648 upheap (heap, k);
649 downheap (heap, N, k);
382} 650}
383 651
384/*****************************************************************************/ 652/*****************************************************************************/
385 653
386typedef struct 654typedef struct
387{ 655{
388 struct ev_signal *head; 656 WL head;
389 sig_atomic_t volatile gotsig; 657 sig_atomic_t volatile gotsig;
390} ANSIG; 658} ANSIG;
391 659
392static ANSIG *signals; 660static ANSIG *signals;
393static int signalmax; 661static int signalmax;
394 662
395static int sigpipe [2]; 663static int sigpipe [2];
396static sig_atomic_t volatile gotsig; 664static sig_atomic_t volatile gotsig;
397static struct ev_io sigev; 665static ev_io sigev;
398 666
399static void 667void inline_size
400signals_init (ANSIG *base, int count) 668signals_init (ANSIG *base, int count)
401{ 669{
402 while (count--) 670 while (count--)
403 { 671 {
404 base->head = 0; 672 base->head = 0;
409} 677}
410 678
411static void 679static void
412sighandler (int signum) 680sighandler (int signum)
413{ 681{
682#if _WIN32
683 signal (signum, sighandler);
684#endif
685
414 signals [signum - 1].gotsig = 1; 686 signals [signum - 1].gotsig = 1;
415 687
416 if (!gotsig) 688 if (!gotsig)
417 { 689 {
690 int old_errno = errno;
418 gotsig = 1; 691 gotsig = 1;
419 write (sigpipe [1], &signum, 1); 692 write (sigpipe [1], &signum, 1);
693 errno = old_errno;
420 } 694 }
695}
696
697void noinline
698ev_feed_signal_event (EV_P_ int signum)
699{
700 WL w;
701
702#if EV_MULTIPLICITY
703 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
704#endif
705
706 --signum;
707
708 if (signum < 0 || signum >= signalmax)
709 return;
710
711 signals [signum].gotsig = 0;
712
713 for (w = signals [signum].head; w; w = w->next)
714 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
421} 715}
422 716
423static void 717static void
424sigcb (struct ev_io *iow, int revents) 718sigcb (EV_P_ ev_io *iow, int revents)
425{ 719{
426 struct ev_signal *w;
427 int signum; 720 int signum;
428 721
429 read (sigpipe [0], &revents, 1); 722 read (sigpipe [0], &revents, 1);
430 gotsig = 0; 723 gotsig = 0;
431 724
432 for (signum = signalmax; signum--; ) 725 for (signum = signalmax; signum--; )
433 if (signals [signum].gotsig) 726 if (signals [signum].gotsig)
727 ev_feed_signal_event (EV_A_ signum + 1);
728}
729
730void inline_size
731fd_intern (int fd)
732{
733#ifdef _WIN32
734 int arg = 1;
735 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
736#else
737 fcntl (fd, F_SETFD, FD_CLOEXEC);
738 fcntl (fd, F_SETFL, O_NONBLOCK);
739#endif
740}
741
742static void noinline
743siginit (EV_P)
744{
745 fd_intern (sigpipe [0]);
746 fd_intern (sigpipe [1]);
747
748 ev_io_set (&sigev, sigpipe [0], EV_READ);
749 ev_io_start (EV_A_ &sigev);
750 ev_unref (EV_A); /* child watcher should not keep loop alive */
751}
752
753/*****************************************************************************/
754
755static ev_child *childs [EV_PID_HASHSIZE];
756
757#ifndef _WIN32
758
759static ev_signal childev;
760
761void inline_speed
762child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
763{
764 ev_child *w;
765
766 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
767 if (w->pid == pid || !w->pid)
434 { 768 {
435 signals [signum].gotsig = 0; 769 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
436 770 w->rpid = pid;
437 for (w = signals [signum].head; w; w = w->next) 771 w->rstatus = status;
438 event ((W)w, EV_SIGNAL); 772 ev_feed_event (EV_A_ (W)w, EV_CHILD);
439 } 773 }
440} 774}
441
442static void
443siginit (void)
444{
445#ifndef WIN32
446 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
447 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
448
449 /* rather than sort out wether we really need nb, set it */
450 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
451 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
452#endif
453
454 ev_io_set (&sigev, sigpipe [0], EV_READ);
455 ev_io_start (&sigev);
456}
457
458/*****************************************************************************/
459
460static struct ev_idle **idles;
461static int idlemax, idlecnt;
462
463static struct ev_prepare **prepares;
464static int preparemax, preparecnt;
465
466static struct ev_check **checks;
467static int checkmax, checkcnt;
468
469/*****************************************************************************/
470
471static struct ev_child *childs [PID_HASHSIZE];
472static struct ev_signal childev;
473
474#ifndef WIN32
475 775
476#ifndef WCONTINUED 776#ifndef WCONTINUED
477# define WCONTINUED 0 777# define WCONTINUED 0
478#endif 778#endif
479 779
480static void 780static void
481childcb (struct ev_signal *sw, int revents) 781childcb (EV_P_ ev_signal *sw, int revents)
482{ 782{
483 struct ev_child *w;
484 int pid, status; 783 int pid, status;
485 784
785 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
486 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 786 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
487 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 787 if (!WCONTINUED
488 if (w->pid == pid || !w->pid) 788 || errno != EINVAL
489 { 789 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
490 w->status = status; 790 return;
491 event ((W)w, EV_CHILD); 791
492 } 792 /* make sure we are called again until all childs have been reaped */
793 /* we need to do it this way so that the callback gets called before we continue */
794 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
795
796 child_reap (EV_A_ sw, pid, pid, status);
797 if (EV_PID_HASHSIZE > 1)
798 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
493} 799}
494 800
495#endif 801#endif
496 802
497/*****************************************************************************/ 803/*****************************************************************************/
498 804
805#if EV_USE_PORT
806# include "ev_port.c"
807#endif
499#if EV_USE_KQUEUE 808#if EV_USE_KQUEUE
500# include "ev_kqueue.c" 809# include "ev_kqueue.c"
501#endif 810#endif
502#if EV_USE_EPOLL 811#if EV_USE_EPOLL
503# include "ev_epoll.c" 812# include "ev_epoll.c"
519ev_version_minor (void) 828ev_version_minor (void)
520{ 829{
521 return EV_VERSION_MINOR; 830 return EV_VERSION_MINOR;
522} 831}
523 832
524/* return true if we are running with elevated privileges and ignore env variables */ 833/* return true if we are running with elevated privileges and should ignore env variables */
525static int 834int inline_size
526enable_secure () 835enable_secure (void)
527{ 836{
837#ifdef _WIN32
838 return 0;
839#else
528 return getuid () != geteuid () 840 return getuid () != geteuid ()
529 || getgid () != getegid (); 841 || getgid () != getegid ();
842#endif
530} 843}
531 844
532int ev_init (int methods) 845unsigned int
846ev_supported_backends (void)
533{ 847{
534 if (!ev_method) 848 unsigned int flags = 0;
849
850 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
851 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
852 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
853 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
854 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
855
856 return flags;
857}
858
859unsigned int
860ev_recommended_backends (void)
861{
862 unsigned int flags = ev_supported_backends ();
863
864#ifndef __NetBSD__
865 /* kqueue is borked on everything but netbsd apparently */
866 /* it usually doesn't work correctly on anything but sockets and pipes */
867 flags &= ~EVBACKEND_KQUEUE;
868#endif
869#ifdef __APPLE__
870 // flags &= ~EVBACKEND_KQUEUE; for documentation
871 flags &= ~EVBACKEND_POLL;
872#endif
873
874 return flags;
875}
876
877unsigned int
878ev_embeddable_backends (void)
879{
880 return EVBACKEND_EPOLL
881 | EVBACKEND_KQUEUE
882 | EVBACKEND_PORT;
883}
884
885unsigned int
886ev_backend (EV_P)
887{
888 return backend;
889}
890
891unsigned int
892ev_loop_count (EV_P)
893{
894 return loop_count;
895}
896
897static void noinline
898loop_init (EV_P_ unsigned int flags)
899{
900 if (!backend)
535 { 901 {
536#if EV_USE_MONOTONIC 902#if EV_USE_MONOTONIC
537 { 903 {
538 struct timespec ts; 904 struct timespec ts;
539 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 905 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
540 have_monotonic = 1; 906 have_monotonic = 1;
541 } 907 }
542#endif 908#endif
543 909
544 ev_now = ev_time (); 910 ev_rt_now = ev_time ();
545 now = get_clock (); 911 mn_now = get_clock ();
546 now_floor = now; 912 now_floor = mn_now;
547 diff = ev_now - now; 913 rtmn_diff = ev_rt_now - mn_now;
548 914
549 if (pipe (sigpipe)) 915 /* pid check not overridable via env */
550 return 0; 916#ifndef _WIN32
917 if (flags & EVFLAG_FORKCHECK)
918 curpid = getpid ();
919#endif
551 920
552 if (methods == EVMETHOD_AUTO) 921 if (!(flags & EVFLAG_NOENV)
553 if (!enable_secure () && getenv ("LIBEV_METHODS")) 922 && !enable_secure ()
923 && getenv ("LIBEV_FLAGS"))
554 methods = atoi (getenv ("LIBEV_METHODS")); 924 flags = atoi (getenv ("LIBEV_FLAGS"));
555 else
556 methods = EVMETHOD_ANY;
557 925
558 ev_method = 0; 926 if (!(flags & 0x0000ffffUL))
927 flags |= ev_recommended_backends ();
928
929 backend = 0;
930 backend_fd = -1;
931#if EV_USE_INOTIFY
932 fs_fd = -2;
933#endif
934
935#if EV_USE_PORT
936 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
937#endif
559#if EV_USE_KQUEUE 938#if EV_USE_KQUEUE
560 if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods); 939 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
561#endif 940#endif
562#if EV_USE_EPOLL 941#if EV_USE_EPOLL
563 if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods); 942 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
564#endif 943#endif
565#if EV_USE_POLL 944#if EV_USE_POLL
566 if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods); 945 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
567#endif 946#endif
568#if EV_USE_SELECT 947#if EV_USE_SELECT
569 if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods); 948 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
570#endif 949#endif
571 950
572 if (ev_method) 951 ev_init (&sigev, sigcb);
952 ev_set_priority (&sigev, EV_MAXPRI);
953 }
954}
955
956static void noinline
957loop_destroy (EV_P)
958{
959 int i;
960
961#if EV_USE_INOTIFY
962 if (fs_fd >= 0)
963 close (fs_fd);
964#endif
965
966 if (backend_fd >= 0)
967 close (backend_fd);
968
969#if EV_USE_PORT
970 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
971#endif
972#if EV_USE_KQUEUE
973 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
974#endif
975#if EV_USE_EPOLL
976 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
977#endif
978#if EV_USE_POLL
979 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
980#endif
981#if EV_USE_SELECT
982 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
983#endif
984
985 for (i = NUMPRI; i--; )
986 array_free (pending, [i]);
987
988 /* have to use the microsoft-never-gets-it-right macro */
989 array_free (fdchange, EMPTY0);
990 array_free (timer, EMPTY0);
991#if EV_PERIODIC_ENABLE
992 array_free (periodic, EMPTY0);
993#endif
994 array_free (idle, EMPTY0);
995 array_free (prepare, EMPTY0);
996 array_free (check, EMPTY0);
997
998 backend = 0;
999}
1000
1001void inline_size infy_fork (EV_P);
1002
1003void inline_size
1004loop_fork (EV_P)
1005{
1006#if EV_USE_PORT
1007 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1008#endif
1009#if EV_USE_KQUEUE
1010 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1011#endif
1012#if EV_USE_EPOLL
1013 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1014#endif
1015#if EV_USE_INOTIFY
1016 infy_fork (EV_A);
1017#endif
1018
1019 if (ev_is_active (&sigev))
1020 {
1021 /* default loop */
1022
1023 ev_ref (EV_A);
1024 ev_io_stop (EV_A_ &sigev);
1025 close (sigpipe [0]);
1026 close (sigpipe [1]);
1027
1028 while (pipe (sigpipe))
1029 syserr ("(libev) error creating pipe");
1030
1031 siginit (EV_A);
1032 }
1033
1034 postfork = 0;
1035}
1036
1037#if EV_MULTIPLICITY
1038struct ev_loop *
1039ev_loop_new (unsigned int flags)
1040{
1041 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1042
1043 memset (loop, 0, sizeof (struct ev_loop));
1044
1045 loop_init (EV_A_ flags);
1046
1047 if (ev_backend (EV_A))
1048 return loop;
1049
1050 return 0;
1051}
1052
1053void
1054ev_loop_destroy (EV_P)
1055{
1056 loop_destroy (EV_A);
1057 ev_free (loop);
1058}
1059
1060void
1061ev_loop_fork (EV_P)
1062{
1063 postfork = 1;
1064}
1065
1066#endif
1067
1068#if EV_MULTIPLICITY
1069struct ev_loop *
1070ev_default_loop_init (unsigned int flags)
1071#else
1072int
1073ev_default_loop (unsigned int flags)
1074#endif
1075{
1076 if (sigpipe [0] == sigpipe [1])
1077 if (pipe (sigpipe))
1078 return 0;
1079
1080 if (!ev_default_loop_ptr)
1081 {
1082#if EV_MULTIPLICITY
1083 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1084#else
1085 ev_default_loop_ptr = 1;
1086#endif
1087
1088 loop_init (EV_A_ flags);
1089
1090 if (ev_backend (EV_A))
573 { 1091 {
574 ev_watcher_init (&sigev, sigcb);
575 siginit (); 1092 siginit (EV_A);
576 1093
577#ifndef WIN32 1094#ifndef _WIN32
578 ev_signal_init (&childev, childcb, SIGCHLD); 1095 ev_signal_init (&childev, childcb, SIGCHLD);
1096 ev_set_priority (&childev, EV_MAXPRI);
579 ev_signal_start (&childev); 1097 ev_signal_start (EV_A_ &childev);
1098 ev_unref (EV_A); /* child watcher should not keep loop alive */
580#endif 1099#endif
581 } 1100 }
1101 else
1102 ev_default_loop_ptr = 0;
582 } 1103 }
583 1104
584 return ev_method; 1105 return ev_default_loop_ptr;
1106}
1107
1108void
1109ev_default_destroy (void)
1110{
1111#if EV_MULTIPLICITY
1112 struct ev_loop *loop = ev_default_loop_ptr;
1113#endif
1114
1115#ifndef _WIN32
1116 ev_ref (EV_A); /* child watcher */
1117 ev_signal_stop (EV_A_ &childev);
1118#endif
1119
1120 ev_ref (EV_A); /* signal watcher */
1121 ev_io_stop (EV_A_ &sigev);
1122
1123 close (sigpipe [0]); sigpipe [0] = 0;
1124 close (sigpipe [1]); sigpipe [1] = 0;
1125
1126 loop_destroy (EV_A);
1127}
1128
1129void
1130ev_default_fork (void)
1131{
1132#if EV_MULTIPLICITY
1133 struct ev_loop *loop = ev_default_loop_ptr;
1134#endif
1135
1136 if (backend)
1137 postfork = 1;
585} 1138}
586 1139
587/*****************************************************************************/ 1140/*****************************************************************************/
588 1141
589void 1142int inline_size
590ev_fork_prepare (void) 1143any_pending (EV_P)
591{ 1144{
592 /* nop */ 1145 int pri;
593}
594 1146
595void 1147 for (pri = NUMPRI; pri--; )
596ev_fork_parent (void) 1148 if (pendingcnt [pri])
597{ 1149 return 1;
598 /* nop */
599}
600 1150
601void 1151 return 0;
602ev_fork_child (void)
603{
604#if EV_USE_EPOLL
605 if (ev_method == EVMETHOD_EPOLL)
606 epoll_postfork_child ();
607#endif
608
609 ev_io_stop (&sigev);
610 close (sigpipe [0]);
611 close (sigpipe [1]);
612 pipe (sigpipe);
613 siginit ();
614} 1152}
615 1153
616/*****************************************************************************/ 1154void inline_speed
617
618static void
619call_pending (void) 1155call_pending (EV_P)
620{ 1156{
621 int pri; 1157 int pri;
622 1158
623 for (pri = NUMPRI; pri--; ) 1159 for (pri = NUMPRI; pri--; )
624 while (pendingcnt [pri]) 1160 while (pendingcnt [pri])
625 { 1161 {
626 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1162 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
627 1163
628 if (p->w) 1164 if (expect_true (p->w))
629 { 1165 {
1166 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1167
630 p->w->pending = 0; 1168 p->w->pending = 0;
631 p->w->cb (p->w, p->events); 1169 EV_CB_INVOKE (p->w, p->events);
632 } 1170 }
633 } 1171 }
634} 1172}
635 1173
636static void 1174void inline_size
637timers_reify (void) 1175timers_reify (EV_P)
638{ 1176{
639 while (timercnt && timers [0]->at <= now) 1177 while (timercnt && ((WT)timers [0])->at <= mn_now)
640 { 1178 {
641 struct ev_timer *w = timers [0]; 1179 ev_timer *w = timers [0];
1180
1181 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
642 1182
643 /* first reschedule or stop timer */ 1183 /* first reschedule or stop timer */
644 if (w->repeat) 1184 if (w->repeat)
645 { 1185 {
646 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1186 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1187
647 w->at = now + w->repeat; 1188 ((WT)w)->at += w->repeat;
1189 if (((WT)w)->at < mn_now)
1190 ((WT)w)->at = mn_now;
1191
648 downheap ((WT *)timers, timercnt, 0); 1192 downheap ((WT *)timers, timercnt, 0);
649 } 1193 }
650 else 1194 else
651 ev_timer_stop (w); /* nonrepeating: stop timer */ 1195 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
652 1196
653 event ((W)w, EV_TIMEOUT); 1197 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
654 } 1198 }
655} 1199}
656 1200
657static void 1201#if EV_PERIODIC_ENABLE
1202void inline_size
658periodics_reify (void) 1203periodics_reify (EV_P)
659{ 1204{
660 while (periodiccnt && periodics [0]->at <= ev_now) 1205 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
661 { 1206 {
662 struct ev_periodic *w = periodics [0]; 1207 ev_periodic *w = periodics [0];
1208
1209 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
663 1210
664 /* first reschedule or stop timer */ 1211 /* first reschedule or stop timer */
665 if (w->interval) 1212 if (w->reschedule_cb)
666 { 1213 {
1214 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
1215 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1216 downheap ((WT *)periodics, periodiccnt, 0);
1217 }
1218 else if (w->interval)
1219 {
667 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1220 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
668 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now)); 1221 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
669 downheap ((WT *)periodics, periodiccnt, 0); 1222 downheap ((WT *)periodics, periodiccnt, 0);
670 } 1223 }
671 else 1224 else
672 ev_periodic_stop (w); /* nonrepeating: stop timer */ 1225 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
673 1226
674 event ((W)w, EV_PERIODIC); 1227 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
675 } 1228 }
676} 1229}
677 1230
678static void 1231static void noinline
679periodics_reschedule (ev_tstamp diff) 1232periodics_reschedule (EV_P)
680{ 1233{
681 int i; 1234 int i;
682 1235
683 /* adjust periodics after time jump */ 1236 /* adjust periodics after time jump */
684 for (i = 0; i < periodiccnt; ++i) 1237 for (i = 0; i < periodiccnt; ++i)
685 { 1238 {
686 struct ev_periodic *w = periodics [i]; 1239 ev_periodic *w = periodics [i];
687 1240
1241 if (w->reschedule_cb)
1242 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
688 if (w->interval) 1243 else if (w->interval)
689 {
690 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1244 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
691
692 if (fabs (diff) >= 1e-4)
693 {
694 ev_periodic_stop (w);
695 ev_periodic_start (w);
696
697 i = 0; /* restart loop, inefficient, but time jumps should be rare */
698 }
699 }
700 } 1245 }
701}
702 1246
703static int 1247 /* now rebuild the heap */
1248 for (i = periodiccnt >> 1; i--; )
1249 downheap ((WT *)periodics, periodiccnt, i);
1250}
1251#endif
1252
1253int inline_size
704time_update_monotonic (void) 1254time_update_monotonic (EV_P)
705{ 1255{
706 now = get_clock (); 1256 mn_now = get_clock ();
707 1257
708 if (expect_true (now - now_floor < MIN_TIMEJUMP * .5)) 1258 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
709 { 1259 {
710 ev_now = now + diff; 1260 ev_rt_now = rtmn_diff + mn_now;
711 return 0; 1261 return 0;
712 } 1262 }
713 else 1263 else
714 { 1264 {
715 now_floor = now; 1265 now_floor = mn_now;
716 ev_now = ev_time (); 1266 ev_rt_now = ev_time ();
717 return 1; 1267 return 1;
718 } 1268 }
719} 1269}
720 1270
721static void 1271void inline_size
722time_update (void) 1272time_update (EV_P)
723{ 1273{
724 int i; 1274 int i;
725 1275
726#if EV_USE_MONOTONIC 1276#if EV_USE_MONOTONIC
727 if (expect_true (have_monotonic)) 1277 if (expect_true (have_monotonic))
728 { 1278 {
729 if (time_update_monotonic ()) 1279 if (time_update_monotonic (EV_A))
730 { 1280 {
731 ev_tstamp odiff = diff; 1281 ev_tstamp odiff = rtmn_diff;
732 1282
733 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1283 /* loop a few times, before making important decisions.
1284 * on the choice of "4": one iteration isn't enough,
1285 * in case we get preempted during the calls to
1286 * ev_time and get_clock. a second call is almost guaranteed
1287 * to succeed in that case, though. and looping a few more times
1288 * doesn't hurt either as we only do this on time-jumps or
1289 * in the unlikely event of having been preempted here.
1290 */
1291 for (i = 4; --i; )
734 { 1292 {
735 diff = ev_now - now; 1293 rtmn_diff = ev_rt_now - mn_now;
736 1294
737 if (fabs (odiff - diff) < MIN_TIMEJUMP) 1295 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
738 return; /* all is well */ 1296 return; /* all is well */
739 1297
740 ev_now = ev_time (); 1298 ev_rt_now = ev_time ();
741 now = get_clock (); 1299 mn_now = get_clock ();
742 now_floor = now; 1300 now_floor = mn_now;
743 } 1301 }
744 1302
1303# if EV_PERIODIC_ENABLE
745 periodics_reschedule (diff - odiff); 1304 periodics_reschedule (EV_A);
1305# endif
746 /* no timer adjustment, as the monotonic clock doesn't jump */ 1306 /* no timer adjustment, as the monotonic clock doesn't jump */
1307 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
747 } 1308 }
748 } 1309 }
749 else 1310 else
750#endif 1311#endif
751 { 1312 {
752 ev_now = ev_time (); 1313 ev_rt_now = ev_time ();
753 1314
754 if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 1315 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
755 { 1316 {
1317#if EV_PERIODIC_ENABLE
756 periodics_reschedule (ev_now - now); 1318 periodics_reschedule (EV_A);
1319#endif
757 1320
758 /* adjust timers. this is easy, as the offset is the same for all */ 1321 /* adjust timers. this is easy, as the offset is the same for all of them */
759 for (i = 0; i < timercnt; ++i) 1322 for (i = 0; i < timercnt; ++i)
760 timers [i]->at += diff; 1323 ((WT)timers [i])->at += ev_rt_now - mn_now;
761 } 1324 }
762 1325
763 now = ev_now; 1326 mn_now = ev_rt_now;
764 } 1327 }
765} 1328}
766 1329
767int ev_loop_done; 1330void
1331ev_ref (EV_P)
1332{
1333 ++activecnt;
1334}
768 1335
1336void
1337ev_unref (EV_P)
1338{
1339 --activecnt;
1340}
1341
1342static int loop_done;
1343
1344void
769void ev_loop (int flags) 1345ev_loop (EV_P_ int flags)
770{ 1346{
771 double block;
772 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1347 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
1348 ? EVUNLOOP_ONE
1349 : EVUNLOOP_CANCEL;
1350
1351 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
773 1352
774 do 1353 do
775 { 1354 {
1355#ifndef _WIN32
1356 if (expect_false (curpid)) /* penalise the forking check even more */
1357 if (expect_false (getpid () != curpid))
1358 {
1359 curpid = getpid ();
1360 postfork = 1;
1361 }
1362#endif
1363
1364#if EV_FORK_ENABLE
1365 /* we might have forked, so queue fork handlers */
1366 if (expect_false (postfork))
1367 if (forkcnt)
1368 {
1369 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1370 call_pending (EV_A);
1371 }
1372#endif
1373
776 /* queue check watchers (and execute them) */ 1374 /* queue check watchers (and execute them) */
777 if (expect_false (preparecnt)) 1375 if (expect_false (preparecnt))
778 { 1376 {
779 queue_events ((W *)prepares, preparecnt, EV_PREPARE); 1377 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
780 call_pending (); 1378 call_pending (EV_A);
781 } 1379 }
782 1380
1381 if (expect_false (!activecnt))
1382 break;
1383
1384 /* we might have forked, so reify kernel state if necessary */
1385 if (expect_false (postfork))
1386 loop_fork (EV_A);
1387
783 /* update fd-related kernel structures */ 1388 /* update fd-related kernel structures */
784 fd_reify (); 1389 fd_reify (EV_A);
785 1390
786 /* calculate blocking time */ 1391 /* calculate blocking time */
1392 {
1393 ev_tstamp block;
787 1394
788 /* we only need this for !monotonic clockor timers, but as we basically 1395 if (expect_false (flags & EVLOOP_NONBLOCK || idlecnt || !activecnt))
789 always have timers, we just calculate it always */ 1396 block = 0.; /* do not block at all */
1397 else
1398 {
1399 /* update time to cancel out callback processing overhead */
790#if EV_USE_MONOTONIC 1400#if EV_USE_MONOTONIC
791 if (expect_true (have_monotonic)) 1401 if (expect_true (have_monotonic))
792 time_update_monotonic (); 1402 time_update_monotonic (EV_A);
793 else 1403 else
794#endif 1404#endif
795 { 1405 {
796 ev_now = ev_time (); 1406 ev_rt_now = ev_time ();
797 now = ev_now; 1407 mn_now = ev_rt_now;
798 } 1408 }
799 1409
800 if (flags & EVLOOP_NONBLOCK || idlecnt)
801 block = 0.;
802 else
803 {
804 block = MAX_BLOCKTIME; 1410 block = MAX_BLOCKTIME;
805 1411
806 if (timercnt) 1412 if (timercnt)
807 { 1413 {
808 ev_tstamp to = timers [0]->at - now + method_fudge; 1414 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
809 if (block > to) block = to; 1415 if (block > to) block = to;
810 } 1416 }
811 1417
1418#if EV_PERIODIC_ENABLE
812 if (periodiccnt) 1419 if (periodiccnt)
813 { 1420 {
814 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1421 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
815 if (block > to) block = to; 1422 if (block > to) block = to;
816 } 1423 }
1424#endif
817 1425
818 if (block < 0.) block = 0.; 1426 if (expect_false (block < 0.)) block = 0.;
819 } 1427 }
820 1428
821 method_poll (block); 1429 ++loop_count;
1430 backend_poll (EV_A_ block);
1431 }
822 1432
823 /* update ev_now, do magic */ 1433 /* update ev_rt_now, do magic */
824 time_update (); 1434 time_update (EV_A);
825 1435
826 /* queue pending timers and reschedule them */ 1436 /* queue pending timers and reschedule them */
827 timers_reify (); /* relative timers called last */ 1437 timers_reify (EV_A); /* relative timers called last */
1438#if EV_PERIODIC_ENABLE
828 periodics_reify (); /* absolute timers called first */ 1439 periodics_reify (EV_A); /* absolute timers called first */
1440#endif
829 1441
830 /* queue idle watchers unless io or timers are pending */ 1442 /* queue idle watchers unless other events are pending */
831 if (!pendingcnt) 1443 if (idlecnt && !any_pending (EV_A))
832 queue_events ((W *)idles, idlecnt, EV_IDLE); 1444 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
833 1445
834 /* queue check watchers, to be executed first */ 1446 /* queue check watchers, to be executed first */
835 if (checkcnt) 1447 if (expect_false (checkcnt))
836 queue_events ((W *)checks, checkcnt, EV_CHECK); 1448 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
837 1449
838 call_pending (); 1450 call_pending (EV_A);
839 }
840 while (!ev_loop_done);
841 1451
842 if (ev_loop_done != 2) 1452 }
1453 while (expect_true (activecnt && !loop_done));
1454
1455 if (loop_done == EVUNLOOP_ONE)
1456 loop_done = EVUNLOOP_CANCEL;
1457}
1458
1459void
1460ev_unloop (EV_P_ int how)
1461{
843 ev_loop_done = 0; 1462 loop_done = how;
844} 1463}
845 1464
846/*****************************************************************************/ 1465/*****************************************************************************/
847 1466
848static void 1467void inline_size
849wlist_add (WL *head, WL elem) 1468wlist_add (WL *head, WL elem)
850{ 1469{
851 elem->next = *head; 1470 elem->next = *head;
852 *head = elem; 1471 *head = elem;
853} 1472}
854 1473
855static void 1474void inline_size
856wlist_del (WL *head, WL elem) 1475wlist_del (WL *head, WL elem)
857{ 1476{
858 while (*head) 1477 while (*head)
859 { 1478 {
860 if (*head == elem) 1479 if (*head == elem)
865 1484
866 head = &(*head)->next; 1485 head = &(*head)->next;
867 } 1486 }
868} 1487}
869 1488
870static void 1489void inline_speed
871ev_clear_pending (W w) 1490ev_clear_pending (EV_P_ W w)
872{ 1491{
873 if (w->pending) 1492 if (w->pending)
874 { 1493 {
875 pendings [ABSPRI (w)][w->pending - 1].w = 0; 1494 pendings [ABSPRI (w)][w->pending - 1].w = 0;
876 w->pending = 0; 1495 w->pending = 0;
877 } 1496 }
878} 1497}
879 1498
880static void 1499void inline_speed
881ev_start (W w, int active) 1500ev_start (EV_P_ W w, int active)
882{ 1501{
883 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 1502 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
884 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI; 1503 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
885 1504
886 w->active = active; 1505 w->active = active;
1506 ev_ref (EV_A);
887} 1507}
888 1508
889static void 1509void inline_size
890ev_stop (W w) 1510ev_stop (EV_P_ W w)
891{ 1511{
1512 ev_unref (EV_A);
892 w->active = 0; 1513 w->active = 0;
893} 1514}
894 1515
895/*****************************************************************************/ 1516/*****************************************************************************/
896 1517
897void 1518void
898ev_io_start (struct ev_io *w) 1519ev_io_start (EV_P_ ev_io *w)
899{ 1520{
900 int fd = w->fd; 1521 int fd = w->fd;
901 1522
902 if (ev_is_active (w)) 1523 if (expect_false (ev_is_active (w)))
903 return; 1524 return;
904 1525
905 assert (("ev_io_start called with negative fd", fd >= 0)); 1526 assert (("ev_io_start called with negative fd", fd >= 0));
906 1527
907 ev_start ((W)w, 1); 1528 ev_start (EV_A_ (W)w, 1);
908 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1529 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
909 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1530 wlist_add ((WL *)&anfds[fd].head, (WL)w);
910 1531
911 fd_change (fd); 1532 fd_change (EV_A_ fd);
912} 1533}
913 1534
914void 1535void
915ev_io_stop (struct ev_io *w) 1536ev_io_stop (EV_P_ ev_io *w)
916{ 1537{
917 ev_clear_pending ((W)w); 1538 ev_clear_pending (EV_A_ (W)w);
918 if (!ev_is_active (w)) 1539 if (expect_false (!ev_is_active (w)))
919 return; 1540 return;
1541
1542 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
920 1543
921 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1544 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
922 ev_stop ((W)w); 1545 ev_stop (EV_A_ (W)w);
923 1546
924 fd_change (w->fd); 1547 fd_change (EV_A_ w->fd);
925} 1548}
926 1549
927void 1550void
928ev_timer_start (struct ev_timer *w) 1551ev_timer_start (EV_P_ ev_timer *w)
929{ 1552{
930 if (ev_is_active (w)) 1553 if (expect_false (ev_is_active (w)))
931 return; 1554 return;
932 1555
933 w->at += now; 1556 ((WT)w)->at += mn_now;
934 1557
935 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 1558 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
936 1559
937 ev_start ((W)w, ++timercnt); 1560 ev_start (EV_A_ (W)w, ++timercnt);
938 array_needsize (timers, timermax, timercnt, ); 1561 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
939 timers [timercnt - 1] = w; 1562 timers [timercnt - 1] = w;
940 upheap ((WT *)timers, timercnt - 1); 1563 upheap ((WT *)timers, timercnt - 1);
941}
942 1564
1565 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
1566}
1567
943void 1568void
944ev_timer_stop (struct ev_timer *w) 1569ev_timer_stop (EV_P_ ev_timer *w)
945{ 1570{
946 ev_clear_pending ((W)w); 1571 ev_clear_pending (EV_A_ (W)w);
947 if (!ev_is_active (w)) 1572 if (expect_false (!ev_is_active (w)))
948 return; 1573 return;
949 1574
950 if (w->active < timercnt--) 1575 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1576
1577 {
1578 int active = ((W)w)->active;
1579
1580 if (expect_true (--active < --timercnt))
951 { 1581 {
952 timers [w->active - 1] = timers [timercnt]; 1582 timers [active] = timers [timercnt];
953 downheap ((WT *)timers, timercnt, w->active - 1); 1583 adjustheap ((WT *)timers, timercnt, active);
954 } 1584 }
1585 }
955 1586
956 w->at = w->repeat; 1587 ((WT)w)->at -= mn_now;
957 1588
958 ev_stop ((W)w); 1589 ev_stop (EV_A_ (W)w);
959} 1590}
960 1591
961void 1592void
962ev_timer_again (struct ev_timer *w) 1593ev_timer_again (EV_P_ ev_timer *w)
963{ 1594{
964 if (ev_is_active (w)) 1595 if (ev_is_active (w))
965 { 1596 {
966 if (w->repeat) 1597 if (w->repeat)
967 { 1598 {
968 w->at = now + w->repeat; 1599 ((WT)w)->at = mn_now + w->repeat;
969 downheap ((WT *)timers, timercnt, w->active - 1); 1600 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
970 } 1601 }
971 else 1602 else
972 ev_timer_stop (w); 1603 ev_timer_stop (EV_A_ w);
973 } 1604 }
974 else if (w->repeat) 1605 else if (w->repeat)
1606 {
1607 w->at = w->repeat;
975 ev_timer_start (w); 1608 ev_timer_start (EV_A_ w);
1609 }
976} 1610}
977 1611
1612#if EV_PERIODIC_ENABLE
978void 1613void
979ev_periodic_start (struct ev_periodic *w) 1614ev_periodic_start (EV_P_ ev_periodic *w)
980{ 1615{
981 if (ev_is_active (w)) 1616 if (expect_false (ev_is_active (w)))
982 return; 1617 return;
983 1618
1619 if (w->reschedule_cb)
1620 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1621 else if (w->interval)
1622 {
984 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 1623 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
985
986 /* this formula differs from the one in periodic_reify because we do not always round up */ 1624 /* this formula differs from the one in periodic_reify because we do not always round up */
987 if (w->interval)
988 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 1625 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1626 }
989 1627
990 ev_start ((W)w, ++periodiccnt); 1628 ev_start (EV_A_ (W)w, ++periodiccnt);
991 array_needsize (periodics, periodicmax, periodiccnt, ); 1629 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
992 periodics [periodiccnt - 1] = w; 1630 periodics [periodiccnt - 1] = w;
993 upheap ((WT *)periodics, periodiccnt - 1); 1631 upheap ((WT *)periodics, periodiccnt - 1);
994}
995 1632
1633 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
1634}
1635
996void 1636void
997ev_periodic_stop (struct ev_periodic *w) 1637ev_periodic_stop (EV_P_ ev_periodic *w)
998{ 1638{
999 ev_clear_pending ((W)w); 1639 ev_clear_pending (EV_A_ (W)w);
1000 if (!ev_is_active (w)) 1640 if (expect_false (!ev_is_active (w)))
1001 return; 1641 return;
1002 1642
1003 if (w->active < periodiccnt--) 1643 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1644
1645 {
1646 int active = ((W)w)->active;
1647
1648 if (expect_true (--active < --periodiccnt))
1004 { 1649 {
1005 periodics [w->active - 1] = periodics [periodiccnt]; 1650 periodics [active] = periodics [periodiccnt];
1006 downheap ((WT *)periodics, periodiccnt, w->active - 1); 1651 adjustheap ((WT *)periodics, periodiccnt, active);
1007 } 1652 }
1653 }
1008 1654
1009 ev_stop ((W)w); 1655 ev_stop (EV_A_ (W)w);
1010} 1656}
1011 1657
1012void 1658void
1659ev_periodic_again (EV_P_ ev_periodic *w)
1660{
1661 /* TODO: use adjustheap and recalculation */
1662 ev_periodic_stop (EV_A_ w);
1663 ev_periodic_start (EV_A_ w);
1664}
1665#endif
1666
1667#ifndef SA_RESTART
1668# define SA_RESTART 0
1669#endif
1670
1671void
1013ev_signal_start (struct ev_signal *w) 1672ev_signal_start (EV_P_ ev_signal *w)
1014{ 1673{
1674#if EV_MULTIPLICITY
1675 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1676#endif
1015 if (ev_is_active (w)) 1677 if (expect_false (ev_is_active (w)))
1016 return; 1678 return;
1017 1679
1018 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 1680 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1019 1681
1020 ev_start ((W)w, 1); 1682 ev_start (EV_A_ (W)w, 1);
1021 array_needsize (signals, signalmax, w->signum, signals_init); 1683 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1022 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 1684 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1023 1685
1024 if (!w->next) 1686 if (!((WL)w)->next)
1025 { 1687 {
1688#if _WIN32
1689 signal (w->signum, sighandler);
1690#else
1026 struct sigaction sa; 1691 struct sigaction sa;
1027 sa.sa_handler = sighandler; 1692 sa.sa_handler = sighandler;
1028 sigfillset (&sa.sa_mask); 1693 sigfillset (&sa.sa_mask);
1029 sa.sa_flags = 0; 1694 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1030 sigaction (w->signum, &sa, 0); 1695 sigaction (w->signum, &sa, 0);
1696#endif
1031 } 1697 }
1032} 1698}
1033 1699
1034void 1700void
1035ev_signal_stop (struct ev_signal *w) 1701ev_signal_stop (EV_P_ ev_signal *w)
1036{ 1702{
1037 ev_clear_pending ((W)w); 1703 ev_clear_pending (EV_A_ (W)w);
1038 if (!ev_is_active (w)) 1704 if (expect_false (!ev_is_active (w)))
1039 return; 1705 return;
1040 1706
1041 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 1707 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1042 ev_stop ((W)w); 1708 ev_stop (EV_A_ (W)w);
1043 1709
1044 if (!signals [w->signum - 1].head) 1710 if (!signals [w->signum - 1].head)
1045 signal (w->signum, SIG_DFL); 1711 signal (w->signum, SIG_DFL);
1046} 1712}
1047 1713
1048void 1714void
1715ev_child_start (EV_P_ ev_child *w)
1716{
1717#if EV_MULTIPLICITY
1718 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1719#endif
1720 if (expect_false (ev_is_active (w)))
1721 return;
1722
1723 ev_start (EV_A_ (W)w, 1);
1724 wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1725}
1726
1727void
1728ev_child_stop (EV_P_ ev_child *w)
1729{
1730 ev_clear_pending (EV_A_ (W)w);
1731 if (expect_false (!ev_is_active (w)))
1732 return;
1733
1734 wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1735 ev_stop (EV_A_ (W)w);
1736}
1737
1738#if EV_STAT_ENABLE
1739
1740# ifdef _WIN32
1741# undef lstat
1742# define lstat(a,b) _stati64 (a,b)
1743# endif
1744
1745#define DEF_STAT_INTERVAL 5.0074891
1746#define MIN_STAT_INTERVAL 0.1074891
1747
1748static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1749
1750#if EV_USE_INOTIFY
1751# define EV_INOTIFY_BUFSIZE 8192
1752
1753static void noinline
1754infy_add (EV_P_ ev_stat *w)
1755{
1756 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);
1757
1758 if (w->wd < 0)
1759 {
1760 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
1761
1762 /* monitor some parent directory for speedup hints */
1763 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1764 {
1765 char path [4096];
1766 strcpy (path, w->path);
1767
1768 do
1769 {
1770 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1771 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1772
1773 char *pend = strrchr (path, '/');
1774
1775 if (!pend)
1776 break; /* whoops, no '/', complain to your admin */
1777
1778 *pend = 0;
1779 w->wd = inotify_add_watch (fs_fd, path, mask);
1780 }
1781 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1782 }
1783 }
1784 else
1785 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1786
1787 if (w->wd >= 0)
1788 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
1789}
1790
1791static void noinline
1792infy_del (EV_P_ ev_stat *w)
1793{
1794 int slot;
1795 int wd = w->wd;
1796
1797 if (wd < 0)
1798 return;
1799
1800 w->wd = -2;
1801 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
1802 wlist_del (&fs_hash [slot].head, (WL)w);
1803
1804 /* remove this watcher, if others are watching it, they will rearm */
1805 inotify_rm_watch (fs_fd, wd);
1806}
1807
1808static void noinline
1809infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1810{
1811 if (slot < 0)
1812 /* overflow, need to check for all hahs slots */
1813 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
1814 infy_wd (EV_A_ slot, wd, ev);
1815 else
1816 {
1817 WL w_;
1818
1819 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
1820 {
1821 ev_stat *w = (ev_stat *)w_;
1822 w_ = w_->next; /* lets us remove this watcher and all before it */
1823
1824 if (w->wd == wd || wd == -1)
1825 {
1826 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1827 {
1828 w->wd = -1;
1829 infy_add (EV_A_ w); /* re-add, no matter what */
1830 }
1831
1832 stat_timer_cb (EV_A_ &w->timer, 0);
1833 }
1834 }
1835 }
1836}
1837
1838static void
1839infy_cb (EV_P_ ev_io *w, int revents)
1840{
1841 char buf [EV_INOTIFY_BUFSIZE];
1842 struct inotify_event *ev = (struct inotify_event *)buf;
1843 int ofs;
1844 int len = read (fs_fd, buf, sizeof (buf));
1845
1846 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
1847 infy_wd (EV_A_ ev->wd, ev->wd, ev);
1848}
1849
1850void inline_size
1851infy_init (EV_P)
1852{
1853 if (fs_fd != -2)
1854 return;
1855
1856 fs_fd = inotify_init ();
1857
1858 if (fs_fd >= 0)
1859 {
1860 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
1861 ev_set_priority (&fs_w, EV_MAXPRI);
1862 ev_io_start (EV_A_ &fs_w);
1863 }
1864}
1865
1866void inline_size
1867infy_fork (EV_P)
1868{
1869 int slot;
1870
1871 if (fs_fd < 0)
1872 return;
1873
1874 close (fs_fd);
1875 fs_fd = inotify_init ();
1876
1877 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
1878 {
1879 WL w_ = fs_hash [slot].head;
1880 fs_hash [slot].head = 0;
1881
1882 while (w_)
1883 {
1884 ev_stat *w = (ev_stat *)w_;
1885 w_ = w_->next; /* lets us add this watcher */
1886
1887 w->wd = -1;
1888
1889 if (fs_fd >= 0)
1890 infy_add (EV_A_ w); /* re-add, no matter what */
1891 else
1892 ev_timer_start (EV_A_ &w->timer);
1893 }
1894
1895 }
1896}
1897
1898#endif
1899
1900void
1901ev_stat_stat (EV_P_ ev_stat *w)
1902{
1903 if (lstat (w->path, &w->attr) < 0)
1904 w->attr.st_nlink = 0;
1905 else if (!w->attr.st_nlink)
1906 w->attr.st_nlink = 1;
1907}
1908
1909static void noinline
1910stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1911{
1912 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
1913
1914 /* we copy this here each the time so that */
1915 /* prev has the old value when the callback gets invoked */
1916 w->prev = w->attr;
1917 ev_stat_stat (EV_A_ w);
1918
1919 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
1920 if (
1921 w->prev.st_dev != w->attr.st_dev
1922 || w->prev.st_ino != w->attr.st_ino
1923 || w->prev.st_mode != w->attr.st_mode
1924 || w->prev.st_nlink != w->attr.st_nlink
1925 || w->prev.st_uid != w->attr.st_uid
1926 || w->prev.st_gid != w->attr.st_gid
1927 || w->prev.st_rdev != w->attr.st_rdev
1928 || w->prev.st_size != w->attr.st_size
1929 || w->prev.st_atime != w->attr.st_atime
1930 || w->prev.st_mtime != w->attr.st_mtime
1931 || w->prev.st_ctime != w->attr.st_ctime
1932 ) {
1933 #if EV_USE_INOTIFY
1934 infy_del (EV_A_ w);
1935 infy_add (EV_A_ w);
1936 ev_stat_stat (EV_A_ w); /* avoid race... */
1937 #endif
1938
1939 ev_feed_event (EV_A_ w, EV_STAT);
1940 }
1941}
1942
1943void
1944ev_stat_start (EV_P_ ev_stat *w)
1945{
1946 if (expect_false (ev_is_active (w)))
1947 return;
1948
1949 /* since we use memcmp, we need to clear any padding data etc. */
1950 memset (&w->prev, 0, sizeof (ev_statdata));
1951 memset (&w->attr, 0, sizeof (ev_statdata));
1952
1953 ev_stat_stat (EV_A_ w);
1954
1955 if (w->interval < MIN_STAT_INTERVAL)
1956 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
1957
1958 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
1959 ev_set_priority (&w->timer, ev_priority (w));
1960
1961#if EV_USE_INOTIFY
1962 infy_init (EV_A);
1963
1964 if (fs_fd >= 0)
1965 infy_add (EV_A_ w);
1966 else
1967#endif
1968 ev_timer_start (EV_A_ &w->timer);
1969
1970 ev_start (EV_A_ (W)w, 1);
1971}
1972
1973void
1974ev_stat_stop (EV_P_ ev_stat *w)
1975{
1976 ev_clear_pending (EV_A_ (W)w);
1977 if (expect_false (!ev_is_active (w)))
1978 return;
1979
1980#if EV_USE_INOTIFY
1981 infy_del (EV_A_ w);
1982#endif
1983 ev_timer_stop (EV_A_ &w->timer);
1984
1985 ev_stop (EV_A_ (W)w);
1986}
1987#endif
1988
1989void
1049ev_idle_start (struct ev_idle *w) 1990ev_idle_start (EV_P_ ev_idle *w)
1050{ 1991{
1051 if (ev_is_active (w)) 1992 if (expect_false (ev_is_active (w)))
1052 return; 1993 return;
1053 1994
1054 ev_start ((W)w, ++idlecnt); 1995 ev_start (EV_A_ (W)w, ++idlecnt);
1055 array_needsize (idles, idlemax, idlecnt, ); 1996 array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1056 idles [idlecnt - 1] = w; 1997 idles [idlecnt - 1] = w;
1057} 1998}
1058 1999
1059void 2000void
1060ev_idle_stop (struct ev_idle *w) 2001ev_idle_stop (EV_P_ ev_idle *w)
1061{ 2002{
1062 ev_clear_pending ((W)w); 2003 ev_clear_pending (EV_A_ (W)w);
1063 if (ev_is_active (w)) 2004 if (expect_false (!ev_is_active (w)))
1064 return; 2005 return;
1065 2006
2007 {
2008 int active = ((W)w)->active;
1066 idles [w->active - 1] = idles [--idlecnt]; 2009 idles [active - 1] = idles [--idlecnt];
2010 ((W)idles [active - 1])->active = active;
2011 }
2012
1067 ev_stop ((W)w); 2013 ev_stop (EV_A_ (W)w);
1068} 2014}
1069 2015
1070void 2016void
1071ev_prepare_start (struct ev_prepare *w) 2017ev_prepare_start (EV_P_ ev_prepare *w)
1072{ 2018{
1073 if (ev_is_active (w)) 2019 if (expect_false (ev_is_active (w)))
1074 return; 2020 return;
1075 2021
1076 ev_start ((W)w, ++preparecnt); 2022 ev_start (EV_A_ (W)w, ++preparecnt);
1077 array_needsize (prepares, preparemax, preparecnt, ); 2023 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1078 prepares [preparecnt - 1] = w; 2024 prepares [preparecnt - 1] = w;
1079} 2025}
1080 2026
1081void 2027void
1082ev_prepare_stop (struct ev_prepare *w) 2028ev_prepare_stop (EV_P_ ev_prepare *w)
1083{ 2029{
1084 ev_clear_pending ((W)w); 2030 ev_clear_pending (EV_A_ (W)w);
1085 if (ev_is_active (w)) 2031 if (expect_false (!ev_is_active (w)))
1086 return; 2032 return;
1087 2033
2034 {
2035 int active = ((W)w)->active;
1088 prepares [w->active - 1] = prepares [--preparecnt]; 2036 prepares [active - 1] = prepares [--preparecnt];
2037 ((W)prepares [active - 1])->active = active;
2038 }
2039
1089 ev_stop ((W)w); 2040 ev_stop (EV_A_ (W)w);
1090} 2041}
1091 2042
1092void 2043void
1093ev_check_start (struct ev_check *w) 2044ev_check_start (EV_P_ ev_check *w)
1094{ 2045{
1095 if (ev_is_active (w)) 2046 if (expect_false (ev_is_active (w)))
1096 return; 2047 return;
1097 2048
1098 ev_start ((W)w, ++checkcnt); 2049 ev_start (EV_A_ (W)w, ++checkcnt);
1099 array_needsize (checks, checkmax, checkcnt, ); 2050 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1100 checks [checkcnt - 1] = w; 2051 checks [checkcnt - 1] = w;
1101} 2052}
1102 2053
1103void 2054void
1104ev_check_stop (struct ev_check *w) 2055ev_check_stop (EV_P_ ev_check *w)
1105{ 2056{
1106 ev_clear_pending ((W)w); 2057 ev_clear_pending (EV_A_ (W)w);
1107 if (ev_is_active (w)) 2058 if (expect_false (!ev_is_active (w)))
1108 return; 2059 return;
1109 2060
2061 {
2062 int active = ((W)w)->active;
1110 checks [w->active - 1] = checks [--checkcnt]; 2063 checks [active - 1] = checks [--checkcnt];
2064 ((W)checks [active - 1])->active = active;
2065 }
2066
1111 ev_stop ((W)w); 2067 ev_stop (EV_A_ (W)w);
1112} 2068}
1113 2069
1114void 2070#if EV_EMBED_ENABLE
1115ev_child_start (struct ev_child *w) 2071void noinline
2072ev_embed_sweep (EV_P_ ev_embed *w)
1116{ 2073{
2074 ev_loop (w->loop, EVLOOP_NONBLOCK);
2075}
2076
2077static void
2078embed_cb (EV_P_ ev_io *io, int revents)
2079{
2080 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2081
1117 if (ev_is_active (w)) 2082 if (ev_cb (w))
1118 return; 2083 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2084 else
2085 ev_embed_sweep (loop, w);
2086}
1119 2087
2088void
2089ev_embed_start (EV_P_ ev_embed *w)
2090{
2091 if (expect_false (ev_is_active (w)))
2092 return;
2093
2094 {
2095 struct ev_loop *loop = w->loop;
2096 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2097 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
2098 }
2099
2100 ev_set_priority (&w->io, ev_priority (w));
2101 ev_io_start (EV_A_ &w->io);
2102
1120 ev_start ((W)w, 1); 2103 ev_start (EV_A_ (W)w, 1);
1121 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1122} 2104}
1123 2105
1124void 2106void
1125ev_child_stop (struct ev_child *w) 2107ev_embed_stop (EV_P_ ev_embed *w)
1126{ 2108{
1127 ev_clear_pending ((W)w); 2109 ev_clear_pending (EV_A_ (W)w);
1128 if (ev_is_active (w)) 2110 if (expect_false (!ev_is_active (w)))
1129 return; 2111 return;
1130 2112
1131 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2113 ev_io_stop (EV_A_ &w->io);
2114
1132 ev_stop ((W)w); 2115 ev_stop (EV_A_ (W)w);
1133} 2116}
2117#endif
2118
2119#if EV_FORK_ENABLE
2120void
2121ev_fork_start (EV_P_ ev_fork *w)
2122{
2123 if (expect_false (ev_is_active (w)))
2124 return;
2125
2126 ev_start (EV_A_ (W)w, ++forkcnt);
2127 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2128 forks [forkcnt - 1] = w;
2129}
2130
2131void
2132ev_fork_stop (EV_P_ ev_fork *w)
2133{
2134 ev_clear_pending (EV_A_ (W)w);
2135 if (expect_false (!ev_is_active (w)))
2136 return;
2137
2138 {
2139 int active = ((W)w)->active;
2140 forks [active - 1] = forks [--forkcnt];
2141 ((W)forks [active - 1])->active = active;
2142 }
2143
2144 ev_stop (EV_A_ (W)w);
2145}
2146#endif
1134 2147
1135/*****************************************************************************/ 2148/*****************************************************************************/
1136 2149
1137struct ev_once 2150struct ev_once
1138{ 2151{
1139 struct ev_io io; 2152 ev_io io;
1140 struct ev_timer to; 2153 ev_timer to;
1141 void (*cb)(int revents, void *arg); 2154 void (*cb)(int revents, void *arg);
1142 void *arg; 2155 void *arg;
1143}; 2156};
1144 2157
1145static void 2158static void
1146once_cb (struct ev_once *once, int revents) 2159once_cb (EV_P_ struct ev_once *once, int revents)
1147{ 2160{
1148 void (*cb)(int revents, void *arg) = once->cb; 2161 void (*cb)(int revents, void *arg) = once->cb;
1149 void *arg = once->arg; 2162 void *arg = once->arg;
1150 2163
1151 ev_io_stop (&once->io); 2164 ev_io_stop (EV_A_ &once->io);
1152 ev_timer_stop (&once->to); 2165 ev_timer_stop (EV_A_ &once->to);
1153 free (once); 2166 ev_free (once);
1154 2167
1155 cb (revents, arg); 2168 cb (revents, arg);
1156} 2169}
1157 2170
1158static void 2171static void
1159once_cb_io (struct ev_io *w, int revents) 2172once_cb_io (EV_P_ ev_io *w, int revents)
1160{ 2173{
1161 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2174 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1162} 2175}
1163 2176
1164static void 2177static void
1165once_cb_to (struct ev_timer *w, int revents) 2178once_cb_to (EV_P_ ev_timer *w, int revents)
1166{ 2179{
1167 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2180 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1168} 2181}
1169 2182
1170void 2183void
1171ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2184ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1172{ 2185{
1173 struct ev_once *once = malloc (sizeof (struct ev_once)); 2186 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1174 2187
1175 if (!once) 2188 if (expect_false (!once))
2189 {
1176 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 2190 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1177 else 2191 return;
1178 { 2192 }
2193
1179 once->cb = cb; 2194 once->cb = cb;
1180 once->arg = arg; 2195 once->arg = arg;
1181 2196
1182 ev_watcher_init (&once->io, once_cb_io); 2197 ev_init (&once->io, once_cb_io);
1183 if (fd >= 0) 2198 if (fd >= 0)
1184 { 2199 {
1185 ev_io_set (&once->io, fd, events); 2200 ev_io_set (&once->io, fd, events);
1186 ev_io_start (&once->io); 2201 ev_io_start (EV_A_ &once->io);
1187 } 2202 }
1188 2203
1189 ev_watcher_init (&once->to, once_cb_to); 2204 ev_init (&once->to, once_cb_to);
1190 if (timeout >= 0.) 2205 if (timeout >= 0.)
1191 { 2206 {
1192 ev_timer_set (&once->to, timeout, 0.); 2207 ev_timer_set (&once->to, timeout, 0.);
1193 ev_timer_start (&once->to); 2208 ev_timer_start (EV_A_ &once->to);
1194 }
1195 }
1196}
1197
1198/*****************************************************************************/
1199
1200#if 0
1201
1202struct ev_io wio;
1203
1204static void
1205sin_cb (struct ev_io *w, int revents)
1206{
1207 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1208}
1209
1210static void
1211ocb (struct ev_timer *w, int revents)
1212{
1213 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1214 ev_timer_stop (w);
1215 ev_timer_start (w);
1216}
1217
1218static void
1219scb (struct ev_signal *w, int revents)
1220{
1221 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1222 ev_io_stop (&wio);
1223 ev_io_start (&wio);
1224}
1225
1226static void
1227gcb (struct ev_signal *w, int revents)
1228{
1229 fprintf (stderr, "generic %x\n", revents);
1230
1231}
1232
1233int main (void)
1234{
1235 ev_init (0);
1236
1237 ev_io_init (&wio, sin_cb, 0, EV_READ);
1238 ev_io_start (&wio);
1239
1240 struct ev_timer t[10000];
1241
1242#if 0
1243 int i;
1244 for (i = 0; i < 10000; ++i)
1245 { 2209 }
1246 struct ev_timer *w = t + i;
1247 ev_watcher_init (w, ocb, i);
1248 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1249 ev_timer_start (w);
1250 if (drand48 () < 0.5)
1251 ev_timer_stop (w);
1252 }
1253#endif
1254
1255 struct ev_timer t1;
1256 ev_timer_init (&t1, ocb, 5, 10);
1257 ev_timer_start (&t1);
1258
1259 struct ev_signal sig;
1260 ev_signal_init (&sig, scb, SIGQUIT);
1261 ev_signal_start (&sig);
1262
1263 struct ev_check cw;
1264 ev_check_init (&cw, gcb);
1265 ev_check_start (&cw);
1266
1267 struct ev_idle iw;
1268 ev_idle_init (&iw, gcb);
1269 ev_idle_start (&iw);
1270
1271 ev_loop (0);
1272
1273 return 0;
1274} 2210}
1275 2211
2212#ifdef __cplusplus
2213}
1276#endif 2214#endif
1277 2215
1278
1279
1280

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