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Comparing libev/ev.c (file contents):
Revision 1.249 by root, Wed May 21 23:30:52 2008 UTC vs.
Revision 1.254 by root, Wed Jun 4 20:26:55 2008 UTC

… …
126# define EV_USE_EVENTFD 1 126# define EV_USE_EVENTFD 1
127# else 127# else
128# define EV_USE_EVENTFD 0 128# define EV_USE_EVENTFD 0
129# endif 129# endif
130# endif 130# endif
131 131
132#endif 132#endif
133 133
134#include <math.h> 134#include <math.h>
135#include <stdlib.h> 135#include <stdlib.h>
136#include <fcntl.h> 136#include <fcntl.h>
… …
164#endif 164#endif
165 165
166/* this block tries to deduce configuration from header-defined symbols and defaults */ 166/* this block tries to deduce configuration from header-defined symbols and defaults */
167 167
168#ifndef EV_USE_MONOTONIC 168#ifndef EV_USE_MONOTONIC
169# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
170# define EV_USE_MONOTONIC 1
171# else
169# define EV_USE_MONOTONIC 0 172# define EV_USE_MONOTONIC 0
173# endif
170#endif 174#endif
171 175
172#ifndef EV_USE_REALTIME 176#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0 177# define EV_USE_REALTIME 0
174#endif 178#endif
175 179
176#ifndef EV_USE_NANOSLEEP 180#ifndef EV_USE_NANOSLEEP
181# if _POSIX_C_SOURCE >= 199309L
182# define EV_USE_NANOSLEEP 1
183# else
177# define EV_USE_NANOSLEEP 0 184# define EV_USE_NANOSLEEP 0
185# endif
178#endif 186#endif
179 187
180#ifndef EV_USE_SELECT 188#ifndef EV_USE_SELECT
181# define EV_USE_SELECT 1 189# define EV_USE_SELECT 1
182#endif 190#endif
… …
236# define EV_USE_EVENTFD 0 244# define EV_USE_EVENTFD 0
237# endif 245# endif
238#endif 246#endif
239 247
240#if 0 /* debugging */ 248#if 0 /* debugging */
241# define EV_VERIFY 1 249# define EV_VERIFY 3
242# define EV_USE_4HEAP 1 250# define EV_USE_4HEAP 1
243# define EV_HEAP_CACHE_AT 1 251# define EV_HEAP_CACHE_AT 1
252#endif
253
254#ifndef EV_VERIFY
255# define EV_VERIFY !EV_MINIMAL
244#endif 256#endif
245 257
246#ifndef EV_USE_4HEAP 258#ifndef EV_USE_4HEAP
247# define EV_USE_4HEAP !EV_MINIMAL 259# define EV_USE_4HEAP !EV_MINIMAL
248#endif 260#endif
… …
294# endif 306# endif
295#endif 307#endif
296 308
297/**/ 309/**/
298 310
299/* EV_VERIFY: enable internal consistency checks
300 * undefined or zero: no verification done or available
301 * 1 or higher: ev_loop_verify function available
302 * 2 or higher: ev_loop_verify is called frequently
303 */
304#if EV_VERIFY >= 1 311#if EV_VERIFY >= 3
305# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 312# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
306#else 313#else
307# define EV_FREQUENT_CHECK do { } while (0) 314# define EV_FREQUENT_CHECK do { } while (0)
308#endif 315#endif
309 316
… …
700 events |= (unsigned char)w->events; 707 events |= (unsigned char)w->events;
701 708
702#if EV_SELECT_IS_WINSOCKET 709#if EV_SELECT_IS_WINSOCKET
703 if (events) 710 if (events)
704 { 711 {
705 unsigned long argp; 712 unsigned long arg;
706 #ifdef EV_FD_TO_WIN32_HANDLE 713 #ifdef EV_FD_TO_WIN32_HANDLE
707 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 714 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
708 #else 715 #else
709 anfd->handle = _get_osfhandle (fd); 716 anfd->handle = _get_osfhandle (fd);
710 #endif 717 #endif
711 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 718 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
712 } 719 }
713#endif 720#endif
714 721
715 { 722 {
716 unsigned char o_events = anfd->events; 723 unsigned char o_events = anfd->events;
… …
769{ 776{
770 int fd; 777 int fd;
771 778
772 for (fd = 0; fd < anfdmax; ++fd) 779 for (fd = 0; fd < anfdmax; ++fd)
773 if (anfds [fd].events) 780 if (anfds [fd].events)
774 if (!fd_valid (fd) == -1 && errno == EBADF) 781 if (!fd_valid (fd) && errno == EBADF)
775 fd_kill (EV_A_ fd); 782 fd_kill (EV_A_ fd);
776} 783}
777 784
778/* called on ENOMEM in select/poll to kill some fds and retry */ 785/* called on ENOMEM in select/poll to kill some fds and retry */
779static void noinline 786static void noinline
… …
938/* rebuild the heap: this function is used only once and executed rarely */ 945/* rebuild the heap: this function is used only once and executed rarely */
939void inline_size 946void inline_size
940reheap (ANHE *heap, int N) 947reheap (ANHE *heap, int N)
941{ 948{
942 int i; 949 int i;
950
943 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */ 951 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
944 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */ 952 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
945 for (i = 0; i < N; ++i) 953 for (i = 0; i < N; ++i)
946 upheap (heap, i + HEAP0); 954 upheap (heap, i + HEAP0);
947} 955}
948 956
949#if EV_VERIFY
950static void
951checkheap (ANHE *heap, int N)
952{
953 int i;
954
955 for (i = HEAP0; i < N + HEAP0; ++i)
956 {
957 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
958 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
959 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
960 }
961}
962#endif
963
964/*****************************************************************************/ 957/*****************************************************************************/
965 958
966typedef struct 959typedef struct
967{ 960{
968 WL head; 961 WL head;
… …
990 983
991void inline_speed 984void inline_speed
992fd_intern (int fd) 985fd_intern (int fd)
993{ 986{
994#ifdef _WIN32 987#ifdef _WIN32
995 int arg = 1; 988 unsigned long arg = 1;
996 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 989 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
997#else 990#else
998 fcntl (fd, F_SETFD, FD_CLOEXEC); 991 fcntl (fd, F_SETFD, FD_CLOEXEC);
999 fcntl (fd, F_SETFL, O_NONBLOCK); 992 fcntl (fd, F_SETFL, O_NONBLOCK);
1000#endif 993#endif
… …
1484 1477
1485 postfork = 0; 1478 postfork = 0;
1486} 1479}
1487 1480
1488#if EV_MULTIPLICITY 1481#if EV_MULTIPLICITY
1482
1489struct ev_loop * 1483struct ev_loop *
1490ev_loop_new (unsigned int flags) 1484ev_loop_new (unsigned int flags)
1491{ 1485{
1492 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 1486 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1493 1487
… …
1513{ 1507{
1514 postfork = 1; /* must be in line with ev_default_fork */ 1508 postfork = 1; /* must be in line with ev_default_fork */
1515} 1509}
1516 1510
1517#if EV_VERIFY 1511#if EV_VERIFY
1518static void 1512void noinline
1513verify_watcher (EV_P_ W w)
1514{
1515 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1516
1517 if (w->pending)
1518 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1519}
1520
1521static void noinline
1522verify_heap (EV_P_ ANHE *heap, int N)
1523{
1524 int i;
1525
1526 for (i = HEAP0; i < N + HEAP0; ++i)
1527 {
1528 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1529 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1530 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1531
1532 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1533 }
1534}
1535
1536static void noinline
1519array_check (W **ws, int cnt) 1537array_verify (EV_P_ W *ws, int cnt)
1520{ 1538{
1521 while (cnt--) 1539 while (cnt--)
1540 {
1522 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 1541 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1542 verify_watcher (EV_A_ ws [cnt]);
1543 }
1523} 1544}
1545#endif
1524 1546
1525static void 1547void
1526ev_loop_verify (EV_P) 1548ev_loop_verify (EV_P)
1527{ 1549{
1550#if EV_VERIFY
1528 int i; 1551 int i;
1552 WL w;
1529 1553
1554 assert (activecnt >= -1);
1555
1556 assert (fdchangemax >= fdchangecnt);
1557 for (i = 0; i < fdchangecnt; ++i)
1558 assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1559
1560 assert (anfdmax >= 0);
1561 for (i = 0; i < anfdmax; ++i)
1562 for (w = anfds [i].head; w; w = w->next)
1563 {
1564 verify_watcher (EV_A_ (W)w);
1565 assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
1566 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1567 }
1568
1569 assert (timermax >= timercnt);
1530 checkheap (timers, timercnt); 1570 verify_heap (EV_A_ timers, timercnt);
1571
1531#if EV_PERIODIC_ENABLE 1572#if EV_PERIODIC_ENABLE
1573 assert (periodicmax >= periodiccnt);
1532 checkheap (periodics, periodiccnt); 1574 verify_heap (EV_A_ periodics, periodiccnt);
1533#endif 1575#endif
1534 1576
1577 for (i = NUMPRI; i--; )
1578 {
1579 assert (pendingmax [i] >= pendingcnt [i]);
1535#if EV_IDLE_ENABLE 1580#if EV_IDLE_ENABLE
1536 for (i = NUMPRI; i--; ) 1581 assert (idleall >= 0);
1582 assert (idlemax [i] >= idlecnt [i]);
1537 array_check ((W **)idles [i], idlecnt [i]); 1583 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1538#endif 1584#endif
1585 }
1586
1539#if EV_FORK_ENABLE 1587#if EV_FORK_ENABLE
1588 assert (forkmax >= forkcnt);
1540 array_check ((W **)forks, forkcnt); 1589 array_verify (EV_A_ (W *)forks, forkcnt);
1541#endif 1590#endif
1542 array_check ((W **)prepares, preparecnt); 1591
1543 array_check ((W **)checks, checkcnt);
1544#if EV_ASYNC_ENABLE 1592#if EV_ASYNC_ENABLE
1593 assert (asyncmax >= asynccnt);
1545 array_check ((W **)asyncs, asynccnt); 1594 array_verify (EV_A_ (W *)asyncs, asynccnt);
1595#endif
1596
1597 assert (preparemax >= preparecnt);
1598 array_verify (EV_A_ (W *)prepares, preparecnt);
1599
1600 assert (checkmax >= checkcnt);
1601 array_verify (EV_A_ (W *)checks, checkcnt);
1602
1603# if 0
1604 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1605 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1546#endif 1606# endif
1547}
1548#endif 1607#endif
1608}
1549 1609
1550#endif 1610#endif /* multiplicity */
1551 1611
1552#if EV_MULTIPLICITY 1612#if EV_MULTIPLICITY
1553struct ev_loop * 1613struct ev_loop *
1554ev_default_loop_init (unsigned int flags) 1614ev_default_loop_init (unsigned int flags)
1555#else 1615#else
… …
1620void inline_speed 1680void inline_speed
1621call_pending (EV_P) 1681call_pending (EV_P)
1622{ 1682{
1623 int pri; 1683 int pri;
1624 1684
1625 EV_FREQUENT_CHECK;
1626
1627 for (pri = NUMPRI; pri--; ) 1685 for (pri = NUMPRI; pri--; )
1628 while (pendingcnt [pri]) 1686 while (pendingcnt [pri])
1629 { 1687 {
1630 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1688 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1631 1689
… …
1633 { 1691 {
1634 /*assert (("non-pending watcher on pending list", p->w->pending));*/ 1692 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1635 1693
1636 p->w->pending = 0; 1694 p->w->pending = 0;
1637 EV_CB_INVOKE (p->w, p->events); 1695 EV_CB_INVOKE (p->w, p->events);
1696 EV_FREQUENT_CHECK;
1638 } 1697 }
1639 } 1698 }
1640
1641 EV_FREQUENT_CHECK;
1642} 1699}
1643 1700
1644#if EV_IDLE_ENABLE 1701#if EV_IDLE_ENABLE
1645void inline_size 1702void inline_size
1646idle_reify (EV_P) 1703idle_reify (EV_P)
… …
1698#if EV_PERIODIC_ENABLE 1755#if EV_PERIODIC_ENABLE
1699void inline_size 1756void inline_size
1700periodics_reify (EV_P) 1757periodics_reify (EV_P)
1701{ 1758{
1702 EV_FREQUENT_CHECK; 1759 EV_FREQUENT_CHECK;
1760
1703 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 1761 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1704 { 1762 {
1705 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 1763 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1706 1764
1707 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/ 1765 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
1713 1771
1714 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now)); 1772 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1715 1773
1716 ANHE_at_cache (periodics [HEAP0]); 1774 ANHE_at_cache (periodics [HEAP0]);
1717 downheap (periodics, periodiccnt, HEAP0); 1775 downheap (periodics, periodiccnt, HEAP0);
1718 EV_FREQUENT_CHECK;
1719 } 1776 }
1720 else if (w->interval) 1777 else if (w->interval)
1721 { 1778 {
1722 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 1779 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1723 /* if next trigger time is not sufficiently in the future, put it there */ 1780 /* if next trigger time is not sufficiently in the future, put it there */
… …
1859 1916
1860 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 1917 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1861 1918
1862 do 1919 do
1863 { 1920 {
1921#if EV_VERIFY >= 2
1922 ev_loop_verify (EV_A);
1923#endif
1924
1864#ifndef _WIN32 1925#ifndef _WIN32
1865 if (expect_false (curpid)) /* penalise the forking check even more */ 1926 if (expect_false (curpid)) /* penalise the forking check even more */
1866 if (expect_false (getpid () != curpid)) 1927 if (expect_false (getpid () != curpid))
1867 { 1928 {
1868 curpid = getpid (); 1929 curpid = getpid ();

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