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

Comparing libev/ev.c (file contents):
Revision 1.54 by root, Sun Nov 4 00:24:16 2007 UTC vs.
Revision 1.58 by root, Sun Nov 4 16:52:52 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#ifndef EV_STANDALONE 31#ifndef EV_EMBED
32# include "config.h" 32# include "config.h"
33#endif 33#endif
34 34
35#include <math.h> 35#include <math.h>
36#include <stdlib.h> 36#include <stdlib.h>
… …
93#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 93#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) */ 94#define MAX_BLOCKTIME 59.731 /* 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 */ 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 */ 96/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
97 97
98#ifndef EV_EMBED
98#include "ev.h" 99# include "ev.h"
100#endif
99 101
100#if __GNUC__ >= 3 102#if __GNUC__ >= 3
101# define expect(expr,value) __builtin_expect ((expr),(value)) 103# define expect(expr,value) __builtin_expect ((expr),(value))
102# define inline inline 104# define inline inline
103#else 105#else
… …
130{ 132{
131 W w; 133 W w;
132 int events; 134 int events;
133} ANPENDING; 135} ANPENDING;
134 136
135#ifdef EV_MULTIPLICITY 137#if EV_MULTIPLICITY
136 138
137struct ev_loop 139struct ev_loop
138{ 140{
139# define VAR(name,decl) decl; 141# define VAR(name,decl) decl;
140# include "ev_vars.h" 142# include "ev_vars.h"
… …
338 fd_kill (EV_A_ fd); 340 fd_kill (EV_A_ fd);
339 return; 341 return;
340 } 342 }
341} 343}
342 344
345/* susually called after fork if method needs to re-arm all fds from scratch */
346static void
347fd_rearm_all (EV_P)
348{
349 int fd;
350
351 /* this should be highly optimised to not do anything but set a flag */
352 for (fd = 0; fd < anfdmax; ++fd)
353 if (anfds [fd].events)
354 {
355 anfds [fd].events = 0;
356 fd_change (fd);
357 }
358}
359
343/*****************************************************************************/ 360/*****************************************************************************/
344 361
345static void 362static void
346upheap (WT *heap, int k) 363upheap (WT *heap, int k)
347{ 364{
… …
560 rt_now = ev_time (); 577 rt_now = ev_time ();
561 mn_now = get_clock (); 578 mn_now = get_clock ();
562 now_floor = mn_now; 579 now_floor = mn_now;
563 rtmn_diff = rt_now - mn_now; 580 rtmn_diff = rt_now - mn_now;
564 581
565 if (pipe (sigpipe))
566 return 0;
567
568 if (methods == EVMETHOD_AUTO) 582 if (methods == EVMETHOD_AUTO)
569 if (!enable_secure () && getenv ("LIBmethodS")) 583 if (!enable_secure () && getenv ("LIBEV_METHODS"))
570 methods = atoi (getenv ("LIBmethodS")); 584 methods = atoi (getenv ("LIBEV_METHODS"));
571 else 585 else
572 methods = EVMETHOD_ANY; 586 methods = EVMETHOD_ANY;
573 587
574 method = 0; 588 method = 0;
575#if EV_USE_KQUEUE 589#if EV_USE_KQUEUE
… …
582 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 596 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
583#endif 597#endif
584#if EV_USE_SELECT 598#if EV_USE_SELECT
585 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 599 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
586#endif 600#endif
601 }
602}
587 603
604void
605loop_destroy (EV_P)
606{
607#if EV_USE_KQUEUE
608 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
609#endif
610#if EV_USE_EPOLL
611 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
612#endif
613#if EV_USEV_POLL
614 if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
615#endif
616#if EV_USE_SELECT
617 if (method == EVMETHOD_SELECT) select_destroy (EV_A);
618#endif
619
620 method = 0;
621 /*TODO*/
622}
623
624void
625loop_fork (EV_P)
626{
627 /*TODO*/
628#if EV_USE_EPOLL
629 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
630#endif
631#if EV_USE_KQUEUE
632 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
633#endif
634}
635
636#if EV_MULTIPLICITY
637struct ev_loop *
638ev_loop_new (int methods)
639{
640 struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
641
642 loop_init (EV_A_ methods);
643
644 if (ev_methods (EV_A))
645 return loop;
646
647 return 0;
648}
649
650void
651ev_loop_destroy (EV_P)
652{
653 loop_destroy (EV_A);
654 free (loop);
655}
656
657void
658ev_loop_fork (EV_P)
659{
660 loop_fork (EV_A);
661}
662
663#endif
664
665#if EV_MULTIPLICITY
666struct ev_loop default_loop_struct;
667static struct ev_loop *default_loop;
668
669struct ev_loop *
670#else
671static int default_loop;
672
673int
674#endif
675ev_default_loop (int methods)
676{
677 if (sigpipe [0] == sigpipe [1])
678 if (pipe (sigpipe))
679 return 0;
680
681 if (!default_loop)
682 {
683#if EV_MULTIPLICITY
684 struct ev_loop *loop = default_loop = &default_loop_struct;
685#else
686 default_loop = 1;
687#endif
688
689 loop_init (EV_A_ methods);
690
588 if (method) 691 if (ev_method (EV_A))
589 { 692 {
590 ev_watcher_init (&sigev, sigcb); 693 ev_watcher_init (&sigev, sigcb);
591 ev_set_priority (&sigev, EV_MAXPRI); 694 ev_set_priority (&sigev, EV_MAXPRI);
592 siginit (EV_A); 695 siginit (EV_A);
593 696
… …
596 ev_set_priority (&childev, EV_MAXPRI); 699 ev_set_priority (&childev, EV_MAXPRI);
597 ev_signal_start (EV_A_ &childev); 700 ev_signal_start (EV_A_ &childev);
598 ev_unref (EV_A); /* child watcher should not keep loop alive */ 701 ev_unref (EV_A); /* child watcher should not keep loop alive */
599#endif 702#endif
600 } 703 }
704 else
705 default_loop = 0;
601 } 706 }
602 707
603 return method;
604}
605
606#ifdef EV_MULTIPLICITY
607
608struct ev_loop *
609ev_loop_new (int methods)
610{
611 struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
612
613 loop_init (EV_A_ methods);
614
615 return loop; 708 return default_loop;
616} 709}
617 710
618void 711void
619ev_loop_delete (EV_P) 712ev_default_destroy (void)
620{ 713{
621 /*TODO*/
622 free (loop);
623}
624
625#else
626
627int
628ev_init (int methods)
629{
630 loop_init ();
631}
632
633#endif
634
635/*****************************************************************************/
636
637void
638ev_fork_prepare (void)
639{
640 /* nop */
641}
642
643void
644ev_fork_parent (void)
645{
646 /* nop */
647}
648
649void
650ev_fork_child (void)
651{
652 /*TODO*/
653#if !EV_MULTIPLICITY 714#if EV_MULTIPLICITY
654#if EV_USE_EPOLL 715 struct ev_loop *loop = default_loop;
655 if (method == EVMETHOD_EPOLL)
656 epoll_postfork_child (EV_A);
657#endif 716#endif
717
718 ev_ref (EV_A); /* child watcher */
719 ev_signal_stop (EV_A_ &childev);
720
721 ev_ref (EV_A); /* signal watcher */
722 ev_io_stop (EV_A_ &sigev);
723
724 close (sigpipe [0]); sigpipe [0] = 0;
725 close (sigpipe [1]); sigpipe [1] = 0;
726
727 loop_destroy (EV_A);
728}
729
730void
731ev_default_fork (EV_P)
732{
733 loop_fork (EV_A);
658 734
659 ev_io_stop (EV_A_ &sigev); 735 ev_io_stop (EV_A_ &sigev);
660 close (sigpipe [0]); 736 close (sigpipe [0]);
661 close (sigpipe [1]); 737 close (sigpipe [1]);
662 pipe (sigpipe); 738 pipe (sigpipe);
739
740 ev_ref (EV_A); /* signal watcher */
663 siginit (EV_A); 741 siginit (EV_A);
664#endif
665} 742}
666 743
667/*****************************************************************************/ 744/*****************************************************************************/
668 745
669static void 746static void
… …
1080 } 1157 }
1081 1158
1082 ev_stop (EV_A_ (W)w); 1159 ev_stop (EV_A_ (W)w);
1083} 1160}
1084 1161
1162void
1163ev_idle_start (EV_P_ struct ev_idle *w)
1164{
1165 if (ev_is_active (w))
1166 return;
1167
1168 ev_start (EV_A_ (W)w, ++idlecnt);
1169 array_needsize (idles, idlemax, idlecnt, );
1170 idles [idlecnt - 1] = w;
1171}
1172
1173void
1174ev_idle_stop (EV_P_ struct ev_idle *w)
1175{
1176 ev_clear_pending (EV_A_ (W)w);
1177 if (ev_is_active (w))
1178 return;
1179
1180 idles [w->active - 1] = idles [--idlecnt];
1181 ev_stop (EV_A_ (W)w);
1182}
1183
1184void
1185ev_prepare_start (EV_P_ struct ev_prepare *w)
1186{
1187 if (ev_is_active (w))
1188 return;
1189
1190 ev_start (EV_A_ (W)w, ++preparecnt);
1191 array_needsize (prepares, preparemax, preparecnt, );
1192 prepares [preparecnt - 1] = w;
1193}
1194
1195void
1196ev_prepare_stop (EV_P_ struct ev_prepare *w)
1197{
1198 ev_clear_pending (EV_A_ (W)w);
1199 if (ev_is_active (w))
1200 return;
1201
1202 prepares [w->active - 1] = prepares [--preparecnt];
1203 ev_stop (EV_A_ (W)w);
1204}
1205
1206void
1207ev_check_start (EV_P_ struct ev_check *w)
1208{
1209 if (ev_is_active (w))
1210 return;
1211
1212 ev_start (EV_A_ (W)w, ++checkcnt);
1213 array_needsize (checks, checkmax, checkcnt, );
1214 checks [checkcnt - 1] = w;
1215}
1216
1217void
1218ev_check_stop (EV_P_ struct ev_check *w)
1219{
1220 ev_clear_pending (EV_A_ (W)w);
1221 if (ev_is_active (w))
1222 return;
1223
1224 checks [w->active - 1] = checks [--checkcnt];
1225 ev_stop (EV_A_ (W)w);
1226}
1227
1085#ifndef SA_RESTART 1228#ifndef SA_RESTART
1086# define SA_RESTART 0 1229# define SA_RESTART 0
1087#endif 1230#endif
1088 1231
1089void 1232void
1090ev_signal_start (EV_P_ struct ev_signal *w) 1233ev_signal_start (EV_P_ struct ev_signal *w)
1091{ 1234{
1235#if EV_MULTIPLICITY
1236 assert (("signal watchers are only supported in the default loop", loop == default_loop));
1237#endif
1092 if (ev_is_active (w)) 1238 if (ev_is_active (w))
1093 return; 1239 return;
1094 1240
1095 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 1241 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1096 1242
… …
1121 if (!signals [w->signum - 1].head) 1267 if (!signals [w->signum - 1].head)
1122 signal (w->signum, SIG_DFL); 1268 signal (w->signum, SIG_DFL);
1123} 1269}
1124 1270
1125void 1271void
1126ev_idle_start (EV_P_ struct ev_idle *w)
1127{
1128 if (ev_is_active (w))
1129 return;
1130
1131 ev_start (EV_A_ (W)w, ++idlecnt);
1132 array_needsize (idles, idlemax, idlecnt, );
1133 idles [idlecnt - 1] = w;
1134}
1135
1136void
1137ev_idle_stop (EV_P_ struct ev_idle *w)
1138{
1139 ev_clear_pending (EV_A_ (W)w);
1140 if (ev_is_active (w))
1141 return;
1142
1143 idles [w->active - 1] = idles [--idlecnt];
1144 ev_stop (EV_A_ (W)w);
1145}
1146
1147void
1148ev_prepare_start (EV_P_ struct ev_prepare *w)
1149{
1150 if (ev_is_active (w))
1151 return;
1152
1153 ev_start (EV_A_ (W)w, ++preparecnt);
1154 array_needsize (prepares, preparemax, preparecnt, );
1155 prepares [preparecnt - 1] = w;
1156}
1157
1158void
1159ev_prepare_stop (EV_P_ struct ev_prepare *w)
1160{
1161 ev_clear_pending (EV_A_ (W)w);
1162 if (ev_is_active (w))
1163 return;
1164
1165 prepares [w->active - 1] = prepares [--preparecnt];
1166 ev_stop (EV_A_ (W)w);
1167}
1168
1169void
1170ev_check_start (EV_P_ struct ev_check *w)
1171{
1172 if (ev_is_active (w))
1173 return;
1174
1175 ev_start (EV_A_ (W)w, ++checkcnt);
1176 array_needsize (checks, checkmax, checkcnt, );
1177 checks [checkcnt - 1] = w;
1178}
1179
1180void
1181ev_check_stop (EV_P_ struct ev_check *w)
1182{
1183 ev_clear_pending (EV_A_ (W)w);
1184 if (ev_is_active (w))
1185 return;
1186
1187 checks [w->active - 1] = checks [--checkcnt];
1188 ev_stop (EV_A_ (W)w);
1189}
1190
1191void
1192ev_child_start (EV_P_ struct ev_child *w) 1272ev_child_start (EV_P_ struct ev_child *w)
1193{ 1273{
1274#if EV_MULTIPLICITY
1275 assert (("child watchers are only supported in the default loop", loop == default_loop));
1276#endif
1194 if (ev_is_active (w)) 1277 if (ev_is_active (w))
1195 return; 1278 return;
1196 1279
1197 ev_start (EV_A_ (W)w, 1); 1280 ev_start (EV_A_ (W)w, 1);
1198 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 1281 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
… …
1270 ev_timer_start (EV_A_ &once->to); 1353 ev_timer_start (EV_A_ &once->to);
1271 } 1354 }
1272 } 1355 }
1273} 1356}
1274 1357
1275/*****************************************************************************/
1276
1277#if 0
1278
1279struct ev_io wio;
1280
1281static void
1282sin_cb (struct ev_io *w, int revents)
1283{
1284 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1285}
1286
1287static void
1288ocb (struct ev_timer *w, int revents)
1289{
1290 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1291 ev_timer_stop (w);
1292 ev_timer_start (w);
1293}
1294
1295static void
1296scb (struct ev_signal *w, int revents)
1297{
1298 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1299 ev_io_stop (&wio);
1300 ev_io_start (&wio);
1301}
1302
1303static void
1304gcb (struct ev_signal *w, int revents)
1305{
1306 fprintf (stderr, "generic %x\n", revents);
1307
1308}
1309
1310int main (void)
1311{
1312 ev_init (0);
1313
1314 ev_io_init (&wio, sin_cb, 0, EV_READ);
1315 ev_io_start (&wio);
1316
1317 struct ev_timer t[10000];
1318
1319#if 0
1320 int i;
1321 for (i = 0; i < 10000; ++i)
1322 {
1323 struct ev_timer *w = t + i;
1324 ev_watcher_init (w, ocb, i);
1325 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1326 ev_timer_start (w);
1327 if (drand48 () < 0.5)
1328 ev_timer_stop (w);
1329 }
1330#endif
1331
1332 struct ev_timer t1;
1333 ev_timer_init (&t1, ocb, 5, 10);
1334 ev_timer_start (&t1);
1335
1336 struct ev_signal sig;
1337 ev_signal_init (&sig, scb, SIGQUIT);
1338 ev_signal_start (&sig);
1339
1340 struct ev_check cw;
1341 ev_check_init (&cw, gcb);
1342 ev_check_start (&cw);
1343
1344 struct ev_idle iw;
1345 ev_idle_init (&iw, gcb);
1346 ev_idle_start (&iw);
1347
1348 ev_loop (0);
1349
1350 return 0;
1351}
1352
1353#endif
1354
1355
1356
1357

Diff Legend

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