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Comparing libev/ev.c (file contents):
Revision 1.146 by root, Tue Nov 27 09:17:51 2007 UTC vs.
Revision 1.158 by root, Thu Nov 29 17:28:13 2007 UTC

… …
94# else 94# else
95# define EV_USE_PORT 0 95# define EV_USE_PORT 0
96# endif 96# endif
97# endif 97# endif
98 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
99#endif 107#endif
100 108
101#include <math.h> 109#include <math.h>
102#include <stdlib.h> 110#include <stdlib.h>
103#include <fcntl.h> 111#include <fcntl.h>
… …
109#include <errno.h> 117#include <errno.h>
110#include <sys/types.h> 118#include <sys/types.h>
111#include <time.h> 119#include <time.h>
112 120
113#include <signal.h> 121#include <signal.h>
122
123#ifdef EV_H
124# include EV_H
125#else
126# include "ev.h"
127#endif
114 128
115#ifndef _WIN32 129#ifndef _WIN32
116# include <sys/time.h> 130# include <sys/time.h>
117# include <sys/wait.h> 131# include <sys/wait.h>
118# include <unistd.h> 132# include <unistd.h>
… …
156 170
157#ifndef EV_USE_PORT 171#ifndef EV_USE_PORT
158# define EV_USE_PORT 0 172# define EV_USE_PORT 0
159#endif 173#endif
160 174
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
193#endif
194
161/**/ 195/**/
162 196
163#ifndef CLOCK_MONOTONIC 197#ifndef CLOCK_MONOTONIC
164# undef EV_USE_MONOTONIC 198# undef EV_USE_MONOTONIC
165# define EV_USE_MONOTONIC 0 199# define EV_USE_MONOTONIC 0
… …
172 206
173#if EV_SELECT_IS_WINSOCKET 207#if EV_SELECT_IS_WINSOCKET
174# include <winsock.h> 208# include <winsock.h>
175#endif 209#endif
176 210
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
177/**/ 219/**/
178 220
179#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) */
180#define MAX_BLOCKTIME 59.743 /* 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) */
181#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
182/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* 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 */
183
184#ifdef EV_H
185# include EV_H
186#else
187# include "ev.h"
188#endif
189 224
190#if __GNUC__ >= 3 225#if __GNUC__ >= 3
191# define expect(expr,value) __builtin_expect ((expr),(value)) 226# define expect(expr,value) __builtin_expect ((expr),(value))
192# define inline_size static inline /* inline for codesize */ 227# define inline_size static inline /* inline for codesize */
193# if EV_MINIMAL 228# if EV_MINIMAL
… …
254ev_set_allocator (void *(*cb)(void *ptr, long size)) 289ev_set_allocator (void *(*cb)(void *ptr, long size))
255{ 290{
256 alloc = cb; 291 alloc = cb;
257} 292}
258 293
259static void * 294inline_speed void *
260ev_realloc (void *ptr, long size) 295ev_realloc (void *ptr, long size)
261{ 296{
262 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 297 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
263 298
264 if (!ptr && size) 299 if (!ptr && size)
… …
288typedef struct 323typedef struct
289{ 324{
290 W w; 325 W w;
291 int events; 326 int events;
292} ANPENDING; 327} ANPENDING;
328
329#if EV_USE_INOTIFY
330typedef struct
331{
332 WL head;
333} ANFS;
334#endif
293 335
294#if EV_MULTIPLICITY 336#if EV_MULTIPLICITY
295 337
296 struct ev_loop 338 struct ev_loop
297 { 339 {
… …
547static void noinline 589static void noinline
548fd_rearm_all (EV_P) 590fd_rearm_all (EV_P)
549{ 591{
550 int fd; 592 int fd;
551 593
552 /* this should be highly optimised to not do anything but set a flag */
553 for (fd = 0; fd < anfdmax; ++fd) 594 for (fd = 0; fd < anfdmax; ++fd)
554 if (anfds [fd].events) 595 if (anfds [fd].events)
555 { 596 {
556 anfds [fd].events = 0; 597 anfds [fd].events = 0;
557 fd_change (EV_A_ fd); 598 fd_change (EV_A_ fd);
… …
709 ev_unref (EV_A); /* child watcher should not keep loop alive */ 750 ev_unref (EV_A); /* child watcher should not keep loop alive */
710} 751}
711 752
712/*****************************************************************************/ 753/*****************************************************************************/
713 754
714static ev_child *childs [PID_HASHSIZE]; 755static ev_child *childs [EV_PID_HASHSIZE];
715 756
716#ifndef _WIN32 757#ifndef _WIN32
717 758
718static ev_signal childev; 759static ev_signal childev;
719 760
720void inline_speed 761void inline_speed
721child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 762child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
722{ 763{
723 ev_child *w; 764 ev_child *w;
724 765
725 for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 766 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
726 if (w->pid == pid || !w->pid) 767 if (w->pid == pid || !w->pid)
727 { 768 {
728 ev_priority (w) = ev_priority (sw); /* need to do it *now* */ 769 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
729 w->rpid = pid; 770 w->rpid = pid;
730 w->rstatus = status; 771 w->rstatus = status;
… …
751 /* make sure we are called again until all childs have been reaped */ 792 /* make sure we are called again until all childs have been reaped */
752 /* we need to do it this way so that the callback gets called before we continue */ 793 /* we need to do it this way so that the callback gets called before we continue */
753 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 794 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
754 795
755 child_reap (EV_A_ sw, pid, pid, status); 796 child_reap (EV_A_ sw, pid, pid, status);
797 if (EV_PID_HASHSIZE > 1)
756 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 798 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
757} 799}
758 800
759#endif 801#endif
760 802
761/*****************************************************************************/ 803/*****************************************************************************/
… …
844ev_backend (EV_P) 886ev_backend (EV_P)
845{ 887{
846 return backend; 888 return backend;
847} 889}
848 890
849static void 891static void noinline
850loop_init (EV_P_ unsigned int flags) 892loop_init (EV_P_ unsigned int flags)
851{ 893{
852 if (!backend) 894 if (!backend)
853 { 895 {
854#if EV_USE_MONOTONIC 896#if EV_USE_MONOTONIC
… …
862 ev_rt_now = ev_time (); 904 ev_rt_now = ev_time ();
863 mn_now = get_clock (); 905 mn_now = get_clock ();
864 now_floor = mn_now; 906 now_floor = mn_now;
865 rtmn_diff = ev_rt_now - mn_now; 907 rtmn_diff = ev_rt_now - mn_now;
866 908
909 /* pid check not overridable via env */
910#ifndef _WIN32
911 if (flags & EVFLAG_FORKCHECK)
912 curpid = getpid ();
913#endif
914
867 if (!(flags & EVFLAG_NOENV) 915 if (!(flags & EVFLAG_NOENV)
868 && !enable_secure () 916 && !enable_secure ()
869 && getenv ("LIBEV_FLAGS")) 917 && getenv ("LIBEV_FLAGS"))
870 flags = atoi (getenv ("LIBEV_FLAGS")); 918 flags = atoi (getenv ("LIBEV_FLAGS"));
871 919
872 if (!(flags & 0x0000ffffUL)) 920 if (!(flags & 0x0000ffffUL))
873 flags |= ev_recommended_backends (); 921 flags |= ev_recommended_backends ();
874 922
875 backend = 0; 923 backend = 0;
924 backend_fd = -1;
925#if EV_USE_INOTIFY
926 fs_fd = -2;
927#endif
928
876#if EV_USE_PORT 929#if EV_USE_PORT
877 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 930 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
878#endif 931#endif
879#if EV_USE_KQUEUE 932#if EV_USE_KQUEUE
880 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 933 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
892 ev_init (&sigev, sigcb); 945 ev_init (&sigev, sigcb);
893 ev_set_priority (&sigev, EV_MAXPRI); 946 ev_set_priority (&sigev, EV_MAXPRI);
894 } 947 }
895} 948}
896 949
897static void 950static void noinline
898loop_destroy (EV_P) 951loop_destroy (EV_P)
899{ 952{
900 int i; 953 int i;
954
955#if EV_USE_INOTIFY
956 if (fs_fd >= 0)
957 close (fs_fd);
958#endif
959
960 if (backend_fd >= 0)
961 close (backend_fd);
901 962
902#if EV_USE_PORT 963#if EV_USE_PORT
903 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 964 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
904#endif 965#endif
905#if EV_USE_KQUEUE 966#if EV_USE_KQUEUE
… …
929 array_free (check, EMPTY0); 990 array_free (check, EMPTY0);
930 991
931 backend = 0; 992 backend = 0;
932} 993}
933 994
934static void 995void inline_size infy_fork (EV_P);
996
997void inline_size
935loop_fork (EV_P) 998loop_fork (EV_P)
936{ 999{
937#if EV_USE_PORT 1000#if EV_USE_PORT
938 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 1001 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
939#endif 1002#endif
940#if EV_USE_KQUEUE 1003#if EV_USE_KQUEUE
941 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 1004 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
942#endif 1005#endif
943#if EV_USE_EPOLL 1006#if EV_USE_EPOLL
944 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 1007 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1008#endif
1009#if EV_USE_INOTIFY
1010 infy_fork (EV_A);
945#endif 1011#endif
946 1012
947 if (ev_is_active (&sigev)) 1013 if (ev_is_active (&sigev))
948 { 1014 {
949 /* default loop */ 1015 /* default loop */
… …
1089 { 1155 {
1090 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1156 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1091 1157
1092 if (expect_true (p->w)) 1158 if (expect_true (p->w))
1093 { 1159 {
1094 assert (("non-pending watcher on pending list", p->w->pending)); 1160 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1095 1161
1096 p->w->pending = 0; 1162 p->w->pending = 0;
1097 EV_CB_INVOKE (p->w, p->events); 1163 EV_CB_INVOKE (p->w, p->events);
1098 } 1164 }
1099 } 1165 }
… …
1104{ 1170{
1105 while (timercnt && ((WT)timers [0])->at <= mn_now) 1171 while (timercnt && ((WT)timers [0])->at <= mn_now)
1106 { 1172 {
1107 ev_timer *w = timers [0]; 1173 ev_timer *w = timers [0];
1108 1174
1109 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1175 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1110 1176
1111 /* first reschedule or stop timer */ 1177 /* first reschedule or stop timer */
1112 if (w->repeat) 1178 if (w->repeat)
1113 { 1179 {
1114 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1180 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
… …
1132{ 1198{
1133 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 1199 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1134 { 1200 {
1135 ev_periodic *w = periodics [0]; 1201 ev_periodic *w = periodics [0];
1136 1202
1137 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1203 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1138 1204
1139 /* first reschedule or stop timer */ 1205 /* first reschedule or stop timer */
1140 if (w->reschedule_cb) 1206 if (w->reschedule_cb)
1141 { 1207 {
1142 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 1208 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
… …
1209 ev_tstamp odiff = rtmn_diff; 1275 ev_tstamp odiff = rtmn_diff;
1210 1276
1211 /* loop a few times, before making important decisions. 1277 /* loop a few times, before making important decisions.
1212 * on the choice of "4": one iteration isn't enough, 1278 * on the choice of "4": one iteration isn't enough,
1213 * in case we get preempted during the calls to 1279 * in case we get preempted during the calls to
1214 * ev_time and get_clock. a second call is almost guarenteed 1280 * ev_time and get_clock. a second call is almost guaranteed
1215 * to succeed in that case, though. and looping a few more times 1281 * to succeed in that case, though. and looping a few more times
1216 * doesn't hurt either as we only do this on time-jumps or 1282 * doesn't hurt either as we only do this on time-jumps or
1217 * in the unlikely event of getting preempted here. 1283 * in the unlikely event of having been preempted here.
1218 */ 1284 */
1219 for (i = 4; --i; ) 1285 for (i = 4; --i; )
1220 { 1286 {
1221 rtmn_diff = ev_rt_now - mn_now; 1287 rtmn_diff = ev_rt_now - mn_now;
1222 1288
… …
1244 { 1310 {
1245#if EV_PERIODIC_ENABLE 1311#if EV_PERIODIC_ENABLE
1246 periodics_reschedule (EV_A); 1312 periodics_reschedule (EV_A);
1247#endif 1313#endif
1248 1314
1249 /* adjust timers. this is easy, as the offset is the same for all */ 1315 /* adjust timers. this is easy, as the offset is the same for all of them */
1250 for (i = 0; i < timercnt; ++i) 1316 for (i = 0; i < timercnt; ++i)
1251 ((WT)timers [i])->at += ev_rt_now - mn_now; 1317 ((WT)timers [i])->at += ev_rt_now - mn_now;
1252 } 1318 }
1253 1319
1254 mn_now = ev_rt_now; 1320 mn_now = ev_rt_now;
… …
1274{ 1340{
1275 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 1341 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
1276 ? EVUNLOOP_ONE 1342 ? EVUNLOOP_ONE
1277 : EVUNLOOP_CANCEL; 1343 : EVUNLOOP_CANCEL;
1278 1344
1345 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1346
1279 while (activecnt) 1347 while (activecnt)
1280 { 1348 {
1349#ifndef _WIN32
1350 if (expect_false (curpid)) /* penalise the forking check even more */
1351 if (expect_false (getpid () != curpid))
1352 {
1353 curpid = getpid ();
1354 postfork = 1;
1355 }
1356#endif
1357
1358#if EV_FORK_ENABLE
1359 /* we might have forked, so queue fork handlers */
1360 if (expect_false (postfork))
1361 if (forkcnt)
1362 {
1363 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1364 call_pending (EV_A);
1365 }
1366#endif
1367
1281 /* queue check watchers (and execute them) */ 1368 /* queue check watchers (and execute them) */
1282 if (expect_false (preparecnt)) 1369 if (expect_false (preparecnt))
1283 { 1370 {
1284 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1371 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1285 call_pending (EV_A); 1372 call_pending (EV_A);
… …
1292 /* update fd-related kernel structures */ 1379 /* update fd-related kernel structures */
1293 fd_reify (EV_A); 1380 fd_reify (EV_A);
1294 1381
1295 /* calculate blocking time */ 1382 /* calculate blocking time */
1296 { 1383 {
1297 double block; 1384 ev_tstamp block;
1298 1385
1299 if (flags & EVLOOP_NONBLOCK || idlecnt) 1386 if (flags & EVLOOP_NONBLOCK || idlecnt)
1300 block = 0.; /* do not block at all */ 1387 block = 0.; /* do not block at all */
1301 else 1388 else
1302 { 1389 {
… …
1464 ev_start (EV_A_ (W)w, ++timercnt); 1551 ev_start (EV_A_ (W)w, ++timercnt);
1465 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 1552 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
1466 timers [timercnt - 1] = w; 1553 timers [timercnt - 1] = w;
1467 upheap ((WT *)timers, timercnt - 1); 1554 upheap ((WT *)timers, timercnt - 1);
1468 1555
1469 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 1556 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
1470} 1557}
1471 1558
1472void 1559void
1473ev_timer_stop (EV_P_ ev_timer *w) 1560ev_timer_stop (EV_P_ ev_timer *w)
1474{ 1561{
… …
1476 if (expect_false (!ev_is_active (w))) 1563 if (expect_false (!ev_is_active (w)))
1477 return; 1564 return;
1478 1565
1479 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 1566 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1480 1567
1568 {
1569 int active = ((W)w)->active;
1570
1481 if (expect_true (((W)w)->active < timercnt--)) 1571 if (expect_true (--active < --timercnt))
1482 { 1572 {
1483 timers [((W)w)->active - 1] = timers [timercnt]; 1573 timers [active] = timers [timercnt];
1484 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 1574 adjustheap ((WT *)timers, timercnt, active);
1485 } 1575 }
1576 }
1486 1577
1487 ((WT)w)->at -= mn_now; 1578 ((WT)w)->at -= mn_now;
1488 1579
1489 ev_stop (EV_A_ (W)w); 1580 ev_stop (EV_A_ (W)w);
1490} 1581}
… …
1528 ev_start (EV_A_ (W)w, ++periodiccnt); 1619 ev_start (EV_A_ (W)w, ++periodiccnt);
1529 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 1620 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
1530 periodics [periodiccnt - 1] = w; 1621 periodics [periodiccnt - 1] = w;
1531 upheap ((WT *)periodics, periodiccnt - 1); 1622 upheap ((WT *)periodics, periodiccnt - 1);
1532 1623
1533 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 1624 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
1534} 1625}
1535 1626
1536void 1627void
1537ev_periodic_stop (EV_P_ ev_periodic *w) 1628ev_periodic_stop (EV_P_ ev_periodic *w)
1538{ 1629{
… …
1540 if (expect_false (!ev_is_active (w))) 1631 if (expect_false (!ev_is_active (w)))
1541 return; 1632 return;
1542 1633
1543 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 1634 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1544 1635
1636 {
1637 int active = ((W)w)->active;
1638
1545 if (expect_true (((W)w)->active < periodiccnt--)) 1639 if (expect_true (--active < --periodiccnt))
1546 { 1640 {
1547 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 1641 periodics [active] = periodics [periodiccnt];
1548 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 1642 adjustheap ((WT *)periodics, periodiccnt, active);
1549 } 1643 }
1644 }
1550 1645
1551 ev_stop (EV_A_ (W)w); 1646 ev_stop (EV_A_ (W)w);
1552} 1647}
1553 1648
1554void 1649void
… …
1615#endif 1710#endif
1616 if (expect_false (ev_is_active (w))) 1711 if (expect_false (ev_is_active (w)))
1617 return; 1712 return;
1618 1713
1619 ev_start (EV_A_ (W)w, 1); 1714 ev_start (EV_A_ (W)w, 1);
1620 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 1715 wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1621} 1716}
1622 1717
1623void 1718void
1624ev_child_stop (EV_P_ ev_child *w) 1719ev_child_stop (EV_P_ ev_child *w)
1625{ 1720{
1626 ev_clear_pending (EV_A_ (W)w); 1721 ev_clear_pending (EV_A_ (W)w);
1627 if (expect_false (!ev_is_active (w))) 1722 if (expect_false (!ev_is_active (w)))
1628 return; 1723 return;
1629 1724
1630 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 1725 wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1631 ev_stop (EV_A_ (W)w); 1726 ev_stop (EV_A_ (W)w);
1632} 1727}
1633 1728
1634#if EV_STAT_ENABLE 1729#if EV_STAT_ENABLE
1635 1730
… …
1639# endif 1734# endif
1640 1735
1641#define DEF_STAT_INTERVAL 5.0074891 1736#define DEF_STAT_INTERVAL 5.0074891
1642#define MIN_STAT_INTERVAL 0.1074891 1737#define MIN_STAT_INTERVAL 0.1074891
1643 1738
1739static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1740
1741#if EV_USE_INOTIFY
1742# define EV_INOTIFY_BUFSIZE 8192
1743
1744static void noinline
1745infy_add (EV_P_ ev_stat *w)
1746{
1747 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);
1748
1749 if (w->wd < 0)
1750 {
1751 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
1752
1753 /* monitor some parent directory for speedup hints */
1754 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1755 {
1756 char path [4096];
1757 strcpy (path, w->path);
1758
1759 do
1760 {
1761 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1762 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1763
1764 char *pend = strrchr (path, '/');
1765
1766 if (!pend)
1767 break; /* whoops, no '/', complain to your admin */
1768
1769 *pend = 0;
1770 w->wd = inotify_add_watch (fs_fd, path, mask);
1771 }
1772 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1773 }
1774 }
1775 else
1776 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1777
1778 if (w->wd >= 0)
1779 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
1780}
1781
1782static void noinline
1783infy_del (EV_P_ ev_stat *w)
1784{
1785 int slot;
1786 int wd = w->wd;
1787
1788 if (wd < 0)
1789 return;
1790
1791 w->wd = -2;
1792 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
1793 wlist_del (&fs_hash [slot].head, (WL)w);
1794
1795 /* remove this watcher, if others are watching it, they will rearm */
1796 inotify_rm_watch (fs_fd, wd);
1797}
1798
1799static void noinline
1800infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1801{
1802 if (slot < 0)
1803 /* overflow, need to check for all hahs slots */
1804 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
1805 infy_wd (EV_A_ slot, wd, ev);
1806 else
1807 {
1808 WL w_;
1809
1810 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
1811 {
1812 ev_stat *w = (ev_stat *)w_;
1813 w_ = w_->next; /* lets us remove this watcher and all before it */
1814
1815 if (w->wd == wd || wd == -1)
1816 {
1817 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1818 {
1819 w->wd = -1;
1820 infy_add (EV_A_ w); /* re-add, no matter what */
1821 }
1822
1823 stat_timer_cb (EV_A_ &w->timer, 0);
1824 }
1825 }
1826 }
1827}
1828
1829static void
1830infy_cb (EV_P_ ev_io *w, int revents)
1831{
1832 char buf [EV_INOTIFY_BUFSIZE];
1833 struct inotify_event *ev = (struct inotify_event *)buf;
1834 int ofs;
1835 int len = read (fs_fd, buf, sizeof (buf));
1836
1837 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
1838 infy_wd (EV_A_ ev->wd, ev->wd, ev);
1839}
1840
1841void inline_size
1842infy_init (EV_P)
1843{
1844 if (fs_fd != -2)
1845 return;
1846
1847 fs_fd = inotify_init ();
1848
1849 if (fs_fd >= 0)
1850 {
1851 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
1852 ev_set_priority (&fs_w, EV_MAXPRI);
1853 ev_io_start (EV_A_ &fs_w);
1854 }
1855}
1856
1857void inline_size
1858infy_fork (EV_P)
1859{
1860 int slot;
1861
1862 if (fs_fd < 0)
1863 return;
1864
1865 close (fs_fd);
1866 fs_fd = inotify_init ();
1867
1868 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
1869 {
1870 WL w_ = fs_hash [slot].head;
1871 fs_hash [slot].head = 0;
1872
1873 while (w_)
1874 {
1875 ev_stat *w = (ev_stat *)w_;
1876 w_ = w_->next; /* lets us add this watcher */
1877
1878 w->wd = -1;
1879
1880 if (fs_fd >= 0)
1881 infy_add (EV_A_ w); /* re-add, no matter what */
1882 else
1883 ev_timer_start (EV_A_ &w->timer);
1884 }
1885
1886 }
1887}
1888
1889#endif
1890
1644void 1891void
1645ev_stat_stat (EV_P_ ev_stat *w) 1892ev_stat_stat (EV_P_ ev_stat *w)
1646{ 1893{
1647 if (lstat (w->path, &w->attr) < 0) 1894 if (lstat (w->path, &w->attr) < 0)
1648 w->attr.st_nlink = 0; 1895 w->attr.st_nlink = 0;
1649 else if (!w->attr.st_nlink) 1896 else if (!w->attr.st_nlink)
1650 w->attr.st_nlink = 1; 1897 w->attr.st_nlink = 1;
1651} 1898}
1652 1899
1653static void 1900static void noinline
1654stat_timer_cb (EV_P_ ev_timer *w_, int revents) 1901stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1655{ 1902{
1656 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 1903 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
1657 1904
1658 /* we copy this here each the time so that */ 1905 /* we copy this here each the time so that */
1659 /* prev has the old value when the callback gets invoked */ 1906 /* prev has the old value when the callback gets invoked */
1660 w->prev = w->attr; 1907 w->prev = w->attr;
1661 ev_stat_stat (EV_A_ w); 1908 ev_stat_stat (EV_A_ w);
1662 1909
1663 if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata))) 1910 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
1911 if (
1912 w->prev.st_dev != w->attr.st_dev
1913 || w->prev.st_ino != w->attr.st_ino
1914 || w->prev.st_mode != w->attr.st_mode
1915 || w->prev.st_nlink != w->attr.st_nlink
1916 || w->prev.st_uid != w->attr.st_uid
1917 || w->prev.st_gid != w->attr.st_gid
1918 || w->prev.st_rdev != w->attr.st_rdev
1919 || w->prev.st_size != w->attr.st_size
1920 || w->prev.st_atime != w->attr.st_atime
1921 || w->prev.st_mtime != w->attr.st_mtime
1922 || w->prev.st_ctime != w->attr.st_ctime
1923 ) {
1924 #if EV_USE_INOTIFY
1925 infy_del (EV_A_ w);
1926 infy_add (EV_A_ w);
1927 ev_stat_stat (EV_A_ w); /* avoid race... */
1928 #endif
1929
1664 ev_feed_event (EV_A_ w, EV_STAT); 1930 ev_feed_event (EV_A_ w, EV_STAT);
1931 }
1665} 1932}
1666 1933
1667void 1934void
1668ev_stat_start (EV_P_ ev_stat *w) 1935ev_stat_start (EV_P_ ev_stat *w)
1669{ 1936{
… …
1679 if (w->interval < MIN_STAT_INTERVAL) 1946 if (w->interval < MIN_STAT_INTERVAL)
1680 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL; 1947 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
1681 1948
1682 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 1949 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
1683 ev_set_priority (&w->timer, ev_priority (w)); 1950 ev_set_priority (&w->timer, ev_priority (w));
1951
1952#if EV_USE_INOTIFY
1953 infy_init (EV_A);
1954
1955 if (fs_fd >= 0)
1956 infy_add (EV_A_ w);
1957 else
1958#endif
1684 ev_timer_start (EV_A_ &w->timer); 1959 ev_timer_start (EV_A_ &w->timer);
1685 1960
1686 ev_start (EV_A_ (W)w, 1); 1961 ev_start (EV_A_ (W)w, 1);
1687} 1962}
1688 1963
1689void 1964void
… …
1691{ 1966{
1692 ev_clear_pending (EV_A_ (W)w); 1967 ev_clear_pending (EV_A_ (W)w);
1693 if (expect_false (!ev_is_active (w))) 1968 if (expect_false (!ev_is_active (w)))
1694 return; 1969 return;
1695 1970
1971#if EV_USE_INOTIFY
1972 infy_del (EV_A_ w);
1973#endif
1696 ev_timer_stop (EV_A_ &w->timer); 1974 ev_timer_stop (EV_A_ &w->timer);
1697 1975
1698 ev_stop (EV_A_ (W)w); 1976 ev_stop (EV_A_ (W)w);
1699} 1977}
1700#endif 1978#endif
… …
1827 2105
1828 ev_stop (EV_A_ (W)w); 2106 ev_stop (EV_A_ (W)w);
1829} 2107}
1830#endif 2108#endif
1831 2109
2110#if EV_FORK_ENABLE
2111void
2112ev_fork_start (EV_P_ ev_fork *w)
2113{
2114 if (expect_false (ev_is_active (w)))
2115 return;
2116
2117 ev_start (EV_A_ (W)w, ++forkcnt);
2118 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2119 forks [forkcnt - 1] = w;
2120}
2121
2122void
2123ev_fork_stop (EV_P_ ev_fork *w)
2124{
2125 ev_clear_pending (EV_A_ (W)w);
2126 if (expect_false (!ev_is_active (w)))
2127 return;
2128
2129 {
2130 int active = ((W)w)->active;
2131 forks [active - 1] = forks [--forkcnt];
2132 ((W)forks [active - 1])->active = active;
2133 }
2134
2135 ev_stop (EV_A_ (W)w);
2136}
2137#endif
2138
1832/*****************************************************************************/ 2139/*****************************************************************************/
1833 2140
1834struct ev_once 2141struct ev_once
1835{ 2142{
1836 ev_io io; 2143 ev_io io;

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