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Comparing libev/ev.c (file contents):
Revision 1.141 by root, Mon Nov 26 20:33:58 2007 UTC vs.
Revision 1.153 by root, Wed Nov 28 11:41:18 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
… …
198# define inline_speed static inline 233# define inline_speed static inline
199# endif 234# endif
200#else 235#else
201# define expect(expr,value) (expr) 236# define expect(expr,value) (expr)
202# define inline_speed static 237# define inline_speed static
203# define inline_minimal static 238# define inline_size static
204# define noinline 239# define noinline
205#endif 240#endif
206 241
207#define expect_false(expr) expect ((expr) != 0, 0) 242#define expect_false(expr) expect ((expr) != 0, 0)
208#define expect_true(expr) expect ((expr) != 0, 1) 243#define expect_true(expr) expect ((expr) != 0, 1)
… …
246 perror (msg); 281 perror (msg);
247 abort (); 282 abort ();
248 } 283 }
249} 284}
250 285
251static void *(*alloc)(void *ptr, long size); 286static void *(*alloc)(void *ptr, size_t size) = realloc;
252 287
253void 288void
254ev_set_allocator (void *(*cb)(void *ptr, long size)) 289ev_set_allocator (void *(*cb)(void *ptr, size_t 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, size_t size)
261{ 296{
262 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 297 ptr = alloc (ptr, size);
263 298
264 if (!ptr && size) 299 if (!ptr && size)
265 { 300 {
266 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 301 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", (long)size);
267 abort (); 302 abort ();
268 } 303 }
269 304
270 return ptr; 305 return ptr;
271} 306}
… …
288typedef struct 323typedef struct
289{ 324{
290 W w; 325 W w;
291 int events; 326 int events;
292} ANPENDING; 327} ANPENDING;
328
329typedef struct
330{
331#if EV_USE_INOTIFY
332 WL head;
333#endif
334} ANFS;
293 335
294#if EV_MULTIPLICITY 336#if EV_MULTIPLICITY
295 337
296 struct ev_loop 338 struct ev_loop
297 { 339 {
… …
709 ev_unref (EV_A); /* child watcher should not keep loop alive */ 751 ev_unref (EV_A); /* child watcher should not keep loop alive */
710} 752}
711 753
712/*****************************************************************************/ 754/*****************************************************************************/
713 755
714static ev_child *childs [PID_HASHSIZE]; 756static ev_child *childs [EV_PID_HASHSIZE];
715 757
716#ifndef _WIN32 758#ifndef _WIN32
717 759
718static ev_signal childev; 760static ev_signal childev;
719
720#ifndef WCONTINUED
721# define WCONTINUED 0
722#endif
723 761
724void inline_speed 762void inline_speed
725child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 763child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
726{ 764{
727 ev_child *w; 765 ev_child *w;
728 766
729 for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 767 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
730 if (w->pid == pid || !w->pid) 768 if (w->pid == pid || !w->pid)
731 { 769 {
732 ev_priority (w) = ev_priority (sw); /* need to do it *now* */ 770 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
733 w->rpid = pid; 771 w->rpid = pid;
734 w->rstatus = status; 772 w->rstatus = status;
735 ev_feed_event (EV_A_ (W)w, EV_CHILD); 773 ev_feed_event (EV_A_ (W)w, EV_CHILD);
736 } 774 }
737} 775}
738 776
777#ifndef WCONTINUED
778# define WCONTINUED 0
779#endif
780
739static void 781static void
740childcb (EV_P_ ev_signal *sw, int revents) 782childcb (EV_P_ ev_signal *sw, int revents)
741{ 783{
742 int pid, status; 784 int pid, status;
743 785
786 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
744 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 787 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
745 { 788 if (!WCONTINUED
789 || errno != EINVAL
790 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
791 return;
792
746 /* make sure we are called again until all childs have been reaped */ 793 /* make sure we are called again until all childs have been reaped */
747 /* we need to do it this way so that the callback gets called before we continue */ 794 /* we need to do it this way so that the callback gets called before we continue */
748 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 795 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
749 796
750 child_reap (EV_A_ sw, pid, pid, status); 797 child_reap (EV_A_ sw, pid, pid, status);
798 if (EV_PID_HASHSIZE > 1)
751 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 799 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
752 }
753} 800}
754 801
755#endif 802#endif
756 803
757/*****************************************************************************/ 804/*****************************************************************************/
… …
840ev_backend (EV_P) 887ev_backend (EV_P)
841{ 888{
842 return backend; 889 return backend;
843} 890}
844 891
845static void 892static void noinline
846loop_init (EV_P_ unsigned int flags) 893loop_init (EV_P_ unsigned int flags)
847{ 894{
848 if (!backend) 895 if (!backend)
849 { 896 {
850#if EV_USE_MONOTONIC 897#if EV_USE_MONOTONIC
… …
867 914
868 if (!(flags & 0x0000ffffUL)) 915 if (!(flags & 0x0000ffffUL))
869 flags |= ev_recommended_backends (); 916 flags |= ev_recommended_backends ();
870 917
871 backend = 0; 918 backend = 0;
919 backend_fd = -1;
920#if EV_USE_INOTIFY
921 fs_fd = -2;
922#endif
923
872#if EV_USE_PORT 924#if EV_USE_PORT
873 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 925 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
874#endif 926#endif
875#if EV_USE_KQUEUE 927#if EV_USE_KQUEUE
876 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 928 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
888 ev_init (&sigev, sigcb); 940 ev_init (&sigev, sigcb);
889 ev_set_priority (&sigev, EV_MAXPRI); 941 ev_set_priority (&sigev, EV_MAXPRI);
890 } 942 }
891} 943}
892 944
893static void 945static void noinline
894loop_destroy (EV_P) 946loop_destroy (EV_P)
895{ 947{
896 int i; 948 int i;
949
950#if EV_USE_INOTIFY
951 if (fs_fd >= 0)
952 close (fs_fd);
953#endif
954
955 if (backend_fd >= 0)
956 close (backend_fd);
897 957
898#if EV_USE_PORT 958#if EV_USE_PORT
899 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 959 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
900#endif 960#endif
901#if EV_USE_KQUEUE 961#if EV_USE_KQUEUE
… …
925 array_free (check, EMPTY0); 985 array_free (check, EMPTY0);
926 986
927 backend = 0; 987 backend = 0;
928} 988}
929 989
930static void 990void inline_size
931loop_fork (EV_P) 991loop_fork (EV_P)
932{ 992{
933#if EV_USE_PORT 993#if EV_USE_PORT
934 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 994 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
935#endif 995#endif
… …
1085 { 1145 {
1086 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1146 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1087 1147
1088 if (expect_true (p->w)) 1148 if (expect_true (p->w))
1089 { 1149 {
1090 assert (("non-pending watcher on pending list", p->w->pending)); 1150 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1091 1151
1092 p->w->pending = 0; 1152 p->w->pending = 0;
1093 EV_CB_INVOKE (p->w, p->events); 1153 EV_CB_INVOKE (p->w, p->events);
1094 } 1154 }
1095 } 1155 }
… …
1100{ 1160{
1101 while (timercnt && ((WT)timers [0])->at <= mn_now) 1161 while (timercnt && ((WT)timers [0])->at <= mn_now)
1102 { 1162 {
1103 ev_timer *w = timers [0]; 1163 ev_timer *w = timers [0];
1104 1164
1105 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1165 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1106 1166
1107 /* first reschedule or stop timer */ 1167 /* first reschedule or stop timer */
1108 if (w->repeat) 1168 if (w->repeat)
1109 { 1169 {
1110 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1170 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
… …
1128{ 1188{
1129 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 1189 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1130 { 1190 {
1131 ev_periodic *w = periodics [0]; 1191 ev_periodic *w = periodics [0];
1132 1192
1133 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1193 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1134 1194
1135 /* first reschedule or stop timer */ 1195 /* first reschedule or stop timer */
1136 if (w->reschedule_cb) 1196 if (w->reschedule_cb)
1137 { 1197 {
1138 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 1198 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
… …
1272 ? EVUNLOOP_ONE 1332 ? EVUNLOOP_ONE
1273 : EVUNLOOP_CANCEL; 1333 : EVUNLOOP_CANCEL;
1274 1334
1275 while (activecnt) 1335 while (activecnt)
1276 { 1336 {
1337 /* we might have forked, so reify kernel state if necessary */
1338 #if EV_FORK_ENABLE
1339 if (expect_false (postfork))
1340 if (forkcnt)
1341 {
1342 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1343 call_pending (EV_A);
1344 }
1345 #endif
1346
1277 /* queue check watchers (and execute them) */ 1347 /* queue check watchers (and execute them) */
1278 if (expect_false (preparecnt)) 1348 if (expect_false (preparecnt))
1279 { 1349 {
1280 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1350 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1281 call_pending (EV_A); 1351 call_pending (EV_A);
… …
1460 ev_start (EV_A_ (W)w, ++timercnt); 1530 ev_start (EV_A_ (W)w, ++timercnt);
1461 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 1531 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
1462 timers [timercnt - 1] = w; 1532 timers [timercnt - 1] = w;
1463 upheap ((WT *)timers, timercnt - 1); 1533 upheap ((WT *)timers, timercnt - 1);
1464 1534
1465 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 1535 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
1466} 1536}
1467 1537
1468void 1538void
1469ev_timer_stop (EV_P_ ev_timer *w) 1539ev_timer_stop (EV_P_ ev_timer *w)
1470{ 1540{
… …
1472 if (expect_false (!ev_is_active (w))) 1542 if (expect_false (!ev_is_active (w)))
1473 return; 1543 return;
1474 1544
1475 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 1545 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1476 1546
1547 {
1548 int active = ((W)w)->active;
1549
1477 if (expect_true (((W)w)->active < timercnt--)) 1550 if (expect_true (--active < --timercnt))
1478 { 1551 {
1479 timers [((W)w)->active - 1] = timers [timercnt]; 1552 timers [active] = timers [timercnt];
1480 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 1553 adjustheap ((WT *)timers, timercnt, active);
1481 } 1554 }
1555 }
1482 1556
1483 ((WT)w)->at -= mn_now; 1557 ((WT)w)->at -= mn_now;
1484 1558
1485 ev_stop (EV_A_ (W)w); 1559 ev_stop (EV_A_ (W)w);
1486} 1560}
… …
1524 ev_start (EV_A_ (W)w, ++periodiccnt); 1598 ev_start (EV_A_ (W)w, ++periodiccnt);
1525 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 1599 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
1526 periodics [periodiccnt - 1] = w; 1600 periodics [periodiccnt - 1] = w;
1527 upheap ((WT *)periodics, periodiccnt - 1); 1601 upheap ((WT *)periodics, periodiccnt - 1);
1528 1602
1529 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 1603 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
1530} 1604}
1531 1605
1532void 1606void
1533ev_periodic_stop (EV_P_ ev_periodic *w) 1607ev_periodic_stop (EV_P_ ev_periodic *w)
1534{ 1608{
… …
1536 if (expect_false (!ev_is_active (w))) 1610 if (expect_false (!ev_is_active (w)))
1537 return; 1611 return;
1538 1612
1539 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 1613 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1540 1614
1615 {
1616 int active = ((W)w)->active;
1617
1541 if (expect_true (((W)w)->active < periodiccnt--)) 1618 if (expect_true (--active < --periodiccnt))
1542 { 1619 {
1543 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 1620 periodics [active] = periodics [periodiccnt];
1544 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 1621 adjustheap ((WT *)periodics, periodiccnt, active);
1545 } 1622 }
1623 }
1546 1624
1547 ev_stop (EV_A_ (W)w); 1625 ev_stop (EV_A_ (W)w);
1548} 1626}
1549 1627
1550void 1628void
… …
1553 /* TODO: use adjustheap and recalculation */ 1631 /* TODO: use adjustheap and recalculation */
1554 ev_periodic_stop (EV_A_ w); 1632 ev_periodic_stop (EV_A_ w);
1555 ev_periodic_start (EV_A_ w); 1633 ev_periodic_start (EV_A_ w);
1556} 1634}
1557#endif 1635#endif
1558
1559void
1560ev_idle_start (EV_P_ ev_idle *w)
1561{
1562 if (expect_false (ev_is_active (w)))
1563 return;
1564
1565 ev_start (EV_A_ (W)w, ++idlecnt);
1566 array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1567 idles [idlecnt - 1] = w;
1568}
1569
1570void
1571ev_idle_stop (EV_P_ ev_idle *w)
1572{
1573 ev_clear_pending (EV_A_ (W)w);
1574 if (expect_false (!ev_is_active (w)))
1575 return;
1576
1577 {
1578 int active = ((W)w)->active;
1579 idles [active - 1] = idles [--idlecnt];
1580 ((W)idles [active - 1])->active = active;
1581 }
1582
1583 ev_stop (EV_A_ (W)w);
1584}
1585
1586void
1587ev_prepare_start (EV_P_ ev_prepare *w)
1588{
1589 if (expect_false (ev_is_active (w)))
1590 return;
1591
1592 ev_start (EV_A_ (W)w, ++preparecnt);
1593 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1594 prepares [preparecnt - 1] = w;
1595}
1596
1597void
1598ev_prepare_stop (EV_P_ ev_prepare *w)
1599{
1600 ev_clear_pending (EV_A_ (W)w);
1601 if (expect_false (!ev_is_active (w)))
1602 return;
1603
1604 {
1605 int active = ((W)w)->active;
1606 prepares [active - 1] = prepares [--preparecnt];
1607 ((W)prepares [active - 1])->active = active;
1608 }
1609
1610 ev_stop (EV_A_ (W)w);
1611}
1612
1613void
1614ev_check_start (EV_P_ ev_check *w)
1615{
1616 if (expect_false (ev_is_active (w)))
1617 return;
1618
1619 ev_start (EV_A_ (W)w, ++checkcnt);
1620 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1621 checks [checkcnt - 1] = w;
1622}
1623
1624void
1625ev_check_stop (EV_P_ ev_check *w)
1626{
1627 ev_clear_pending (EV_A_ (W)w);
1628 if (expect_false (!ev_is_active (w)))
1629 return;
1630
1631 {
1632 int active = ((W)w)->active;
1633 checks [active - 1] = checks [--checkcnt];
1634 ((W)checks [active - 1])->active = active;
1635 }
1636
1637 ev_stop (EV_A_ (W)w);
1638}
1639 1636
1640#ifndef SA_RESTART 1637#ifndef SA_RESTART
1641# define SA_RESTART 0 1638# define SA_RESTART 0
1642#endif 1639#endif
1643 1640
… …
1692#endif 1689#endif
1693 if (expect_false (ev_is_active (w))) 1690 if (expect_false (ev_is_active (w)))
1694 return; 1691 return;
1695 1692
1696 ev_start (EV_A_ (W)w, 1); 1693 ev_start (EV_A_ (W)w, 1);
1697 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 1694 wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1698} 1695}
1699 1696
1700void 1697void
1701ev_child_stop (EV_P_ ev_child *w) 1698ev_child_stop (EV_P_ ev_child *w)
1702{ 1699{
1703 ev_clear_pending (EV_A_ (W)w); 1700 ev_clear_pending (EV_A_ (W)w);
1704 if (expect_false (!ev_is_active (w))) 1701 if (expect_false (!ev_is_active (w)))
1705 return; 1702 return;
1706 1703
1707 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 1704 wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1705 ev_stop (EV_A_ (W)w);
1706}
1707
1708#if EV_STAT_ENABLE
1709
1710# ifdef _WIN32
1711# undef lstat
1712# define lstat(a,b) _stati64 (a,b)
1713# endif
1714
1715#define DEF_STAT_INTERVAL 5.0074891
1716#define MIN_STAT_INTERVAL 0.1074891
1717
1718void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1719
1720#if EV_USE_INOTIFY
1721# define EV_INOTIFY_BUFSIZE 8192
1722
1723static void noinline
1724infy_add (EV_P_ ev_stat *w)
1725{
1726 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);
1727
1728 if (w->wd < 0)
1729 {
1730 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
1731
1732 /* monitor some parent directory for speedup hints */
1733 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1734 {
1735 char path [4096];
1736 strcpy (path, w->path);
1737
1738 do
1739 {
1740 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1741 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1742
1743 char *pend = strrchr (path, '/');
1744
1745 if (!pend)
1746 break; /* whoops, no '/', complain to your admin */
1747
1748 *pend = 0;
1749 w->wd = inotify_add_watch (fs_fd, path, mask);
1750 }
1751 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1752 }
1753 }
1754 else
1755 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1756
1757 if (w->wd >= 0)
1758 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
1759}
1760
1761static void noinline
1762infy_del (EV_P_ ev_stat *w)
1763{
1764 int slot;
1765 int wd = w->wd;
1766
1767 if (wd < 0)
1768 return;
1769
1770 w->wd = -2;
1771 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
1772 wlist_del (&fs_hash [slot].head, (WL)w);
1773
1774 /* remove this watcher, if others are watching it, they will rearm */
1775 inotify_rm_watch (fs_fd, wd);
1776}
1777
1778static void noinline
1779infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1780{
1781 if (slot < 0)
1782 /* overflow, need to check for all hahs slots */
1783 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
1784 infy_wd (EV_A_ slot, wd, ev);
1785 else
1786 {
1787 WL w_;
1788
1789 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
1790 {
1791 ev_stat *w = (ev_stat *)w_;
1792 w_ = w_->next; /* lets us remove this watcher and all before it */
1793
1794 if (w->wd == wd || wd == -1)
1795 {
1796 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1797 {
1798 w->wd = -1;
1799 infy_add (EV_A_ w); /* re-add, no matter what */
1800 }
1801
1802 stat_timer_cb (EV_A_ &w->timer, 0);
1803 }
1804 }
1805 }
1806}
1807
1808static void
1809infy_cb (EV_P_ ev_io *w, int revents)
1810{
1811 char buf [EV_INOTIFY_BUFSIZE];
1812 struct inotify_event *ev = (struct inotify_event *)buf;
1813 int ofs;
1814 int len = read (fs_fd, buf, sizeof (buf));
1815
1816 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
1817 infy_wd (EV_A_ ev->wd, ev->wd, ev);
1818}
1819
1820void inline_size
1821infy_init (EV_P)
1822{
1823 if (fs_fd != -2)
1824 return;
1825
1826 fs_fd = inotify_init ();
1827
1828 if (fs_fd >= 0)
1829 {
1830 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
1831 ev_set_priority (&fs_w, EV_MAXPRI);
1832 ev_io_start (EV_A_ &fs_w);
1833 }
1834}
1835
1836#endif
1837
1838void
1839ev_stat_stat (EV_P_ ev_stat *w)
1840{
1841 if (lstat (w->path, &w->attr) < 0)
1842 w->attr.st_nlink = 0;
1843 else if (!w->attr.st_nlink)
1844 w->attr.st_nlink = 1;
1845}
1846
1847void noinline
1848stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1849{
1850 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
1851
1852 /* we copy this here each the time so that */
1853 /* prev has the old value when the callback gets invoked */
1854 w->prev = w->attr;
1855 ev_stat_stat (EV_A_ w);
1856
1857 if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
1858 {
1859 #if EV_USE_INOTIFY
1860 infy_del (EV_A_ w);
1861 infy_add (EV_A_ w);
1862 ev_stat_stat (EV_A_ w); /* avoid race... */
1863 #endif
1864
1865 ev_feed_event (EV_A_ w, EV_STAT);
1866 }
1867}
1868
1869void
1870ev_stat_start (EV_P_ ev_stat *w)
1871{
1872 if (expect_false (ev_is_active (w)))
1873 return;
1874
1875 /* since we use memcmp, we need to clear any padding data etc. */
1876 memset (&w->prev, 0, sizeof (ev_statdata));
1877 memset (&w->attr, 0, sizeof (ev_statdata));
1878
1879 ev_stat_stat (EV_A_ w);
1880
1881 if (w->interval < MIN_STAT_INTERVAL)
1882 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
1883
1884 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
1885 ev_set_priority (&w->timer, ev_priority (w));
1886
1887#if EV_USE_INOTIFY
1888 infy_init (EV_A);
1889
1890 if (fs_fd >= 0)
1891 infy_add (EV_A_ w);
1892 else
1893#endif
1894 ev_timer_start (EV_A_ &w->timer);
1895
1896 ev_start (EV_A_ (W)w, 1);
1897}
1898
1899void
1900ev_stat_stop (EV_P_ ev_stat *w)
1901{
1902 ev_clear_pending (EV_A_ (W)w);
1903 if (expect_false (!ev_is_active (w)))
1904 return;
1905
1906#if EV_USE_INOTIFY
1907 infy_del (EV_A_ w);
1908#endif
1909 ev_timer_stop (EV_A_ &w->timer);
1910
1911 ev_stop (EV_A_ (W)w);
1912}
1913#endif
1914
1915void
1916ev_idle_start (EV_P_ ev_idle *w)
1917{
1918 if (expect_false (ev_is_active (w)))
1919 return;
1920
1921 ev_start (EV_A_ (W)w, ++idlecnt);
1922 array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1923 idles [idlecnt - 1] = w;
1924}
1925
1926void
1927ev_idle_stop (EV_P_ ev_idle *w)
1928{
1929 ev_clear_pending (EV_A_ (W)w);
1930 if (expect_false (!ev_is_active (w)))
1931 return;
1932
1933 {
1934 int active = ((W)w)->active;
1935 idles [active - 1] = idles [--idlecnt];
1936 ((W)idles [active - 1])->active = active;
1937 }
1938
1939 ev_stop (EV_A_ (W)w);
1940}
1941
1942void
1943ev_prepare_start (EV_P_ ev_prepare *w)
1944{
1945 if (expect_false (ev_is_active (w)))
1946 return;
1947
1948 ev_start (EV_A_ (W)w, ++preparecnt);
1949 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1950 prepares [preparecnt - 1] = w;
1951}
1952
1953void
1954ev_prepare_stop (EV_P_ ev_prepare *w)
1955{
1956 ev_clear_pending (EV_A_ (W)w);
1957 if (expect_false (!ev_is_active (w)))
1958 return;
1959
1960 {
1961 int active = ((W)w)->active;
1962 prepares [active - 1] = prepares [--preparecnt];
1963 ((W)prepares [active - 1])->active = active;
1964 }
1965
1966 ev_stop (EV_A_ (W)w);
1967}
1968
1969void
1970ev_check_start (EV_P_ ev_check *w)
1971{
1972 if (expect_false (ev_is_active (w)))
1973 return;
1974
1975 ev_start (EV_A_ (W)w, ++checkcnt);
1976 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1977 checks [checkcnt - 1] = w;
1978}
1979
1980void
1981ev_check_stop (EV_P_ ev_check *w)
1982{
1983 ev_clear_pending (EV_A_ (W)w);
1984 if (expect_false (!ev_is_active (w)))
1985 return;
1986
1987 {
1988 int active = ((W)w)->active;
1989 checks [active - 1] = checks [--checkcnt];
1990 ((W)checks [active - 1])->active = active;
1991 }
1992
1708 ev_stop (EV_A_ (W)w); 1993 ev_stop (EV_A_ (W)w);
1709} 1994}
1710 1995
1711#if EV_EMBED_ENABLE 1996#if EV_EMBED_ENABLE
1712void noinline 1997void noinline
… …
1755 2040
1756 ev_stop (EV_A_ (W)w); 2041 ev_stop (EV_A_ (W)w);
1757} 2042}
1758#endif 2043#endif
1759 2044
1760#if EV_STAT_ENABLE 2045#if EV_FORK_ENABLE
1761
1762# ifdef _WIN32
1763# define lstat(a,b) stat(a,b)
1764# endif
1765
1766void 2046void
1767ev_stat_stat (EV_P_ ev_stat *w)
1768{
1769 if (lstat (w->path, &w->attr) < 0)
1770 w->attr.st_nlink = 0;
1771 else if (!w->attr.st_nlink)
1772 w->attr.st_nlink = 1;
1773}
1774
1775static void
1776stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1777{
1778 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
1779
1780 /* we copy this here each the time so that */
1781 /* prev has the old value when the callback gets invoked */
1782 w->prev = w->attr;
1783 ev_stat_stat (EV_A_ w);
1784
1785 if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
1786 ev_feed_event (EV_A_ w, EV_STAT);
1787}
1788
1789void
1790ev_stat_start (EV_P_ ev_stat *w) 2047ev_fork_start (EV_P_ ev_fork *w)
1791{ 2048{
1792 if (expect_false (ev_is_active (w))) 2049 if (expect_false (ev_is_active (w)))
1793 return; 2050 return;
1794 2051
1795 /* since we use memcmp, we need to clear any padding data etc. */
1796 memset (&w->prev, 0, sizeof (ev_statdata));
1797 memset (&w->attr, 0, sizeof (ev_statdata));
1798
1799 ev_stat_stat (EV_A_ w);
1800
1801 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
1802 ev_set_priority (&w->timer, ev_priority (w));
1803 ev_timer_start (EV_A_ &w->timer);
1804
1805 ev_start (EV_A_ (W)w, 1); 2052 ev_start (EV_A_ (W)w, ++forkcnt);
2053 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2054 forks [forkcnt - 1] = w;
1806} 2055}
1807 2056
1808void 2057void
1809ev_stat_stop (EV_P_ ev_stat *w) 2058ev_fork_stop (EV_P_ ev_fork *w)
1810{ 2059{
1811 ev_clear_pending (EV_A_ (W)w); 2060 ev_clear_pending (EV_A_ (W)w);
1812 if (expect_false (!ev_is_active (w))) 2061 if (expect_false (!ev_is_active (w)))
1813 return; 2062 return;
1814 2063
1815 ev_timer_stop (EV_A_ &w->timer); 2064 {
2065 int active = ((W)w)->active;
2066 forks [active - 1] = forks [--forkcnt];
2067 ((W)forks [active - 1])->active = active;
2068 }
1816 2069
1817 ev_stop (EV_A_ (W)w); 2070 ev_stop (EV_A_ (W)w);
1818} 2071}
1819#endif 2072#endif
1820 2073

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