[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.373 by root, Sun Feb 20 02:56:23 2011 UTC vs.
Revision 1.388 by root, Fri Jul 29 12:17:26 2011 UTC

…		…
464	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	464	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
465		465
466	#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)	466	#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
467	#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)	467	#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
468		468
469	#if __GNUC__ >= 4	469	/* the following are taken from libecb */
470	# define expect(expr,value) __builtin_expect ((expr),(value))	470	/* ecb.h start */
471	# define noinline __attribute__ ((noinline))	471
		472	/* many compilers define _GNUC_ to some versions but then only implement
		473	* what their idiot authors think are the "more important" extensions,
		474	* causing enourmous grief in return for some better fake benchmark numbers.
		475	* or so.
		476	* we try to detect these and simply assume they are not gcc - if they have
		477	* an issue with that they should have done it right in the first place.
		478	*/
		479	#ifndef ECB_GCC_VERSION
		480	#if !defined(__GNUC_MINOR__) \|\| defined(__INTEL_COMPILER) \|\| defined(__SUNPRO_C) \|\| defined(__SUNPRO_CC) \|\| defined(__llvm__) \|\| defined(__clang__)
		481	#define ECB_GCC_VERSION(major,minor) 0
		482	#else
		483	#define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) \|\| (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
		484	#endif
		485	#endif
		486
		487	#if __cplusplus
		488	#define ecb_inline static inline
		489	#elif ECB_GCC_VERSION(2,5)
		490	#define ecb_inline static __inline__
		491	#elif ECB_C99
		492	#define ecb_inline static inline
472	#else	493	#else
473	# define expect(expr,value) (expr)	494	#define ecb_inline static
474	# define noinline
475	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
476	# define inline
477	# endif	495	#endif
		496
		497	#ifndef ECB_MEMORY_FENCE
		498	#if ECB_GCC_VERSION(2,5)
		499	#if __x86
		500	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
		501	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		502	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE /* better be safe than sorry */
		503	#elif __amd64
		504	#define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
		505	#define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
		506	#define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence")
		507	#endif
478	#endif	508	#endif
		509	#endif
479		510
		511	#ifndef ECB_MEMORY_FENCE
		512	#if ECB_GCC_VERSION(4,4)
		513	#define ECB_MEMORY_FENCE __sync_synchronize ()
		514	#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); })
		515	#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); })
		516	#elif _MSC_VER >= 1400 && 0 /* TODO: only true when using volatiles */
		517	#define ECB_MEMORY_FENCE do { } while (0)
		518	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		519	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		520	#elif defined(_WIN32)
		521	#include <WinNT.h>
		522	#define ECB_MEMORY_FENCE MemoryBarrier ()
		523	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		524	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		525	#endif
		526	#endif
		527
		528	#ifndef ECB_MEMORY_FENCE
		529	#include <pthread.h>
		530
		531	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		532	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		533	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		534	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		535	#endif
		536
		537	#if ECB_GCC_VERSION(3,1)
		538	#define ecb_attribute(attrlist) __attribute__(attrlist)
		539	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		540	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		541	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
		542	#else
		543	#define ecb_attribute(attrlist)
		544	#define ecb_is_constant(expr) 0
		545	#define ecb_expect(expr,value) (expr)
		546	#define ecb_prefetch(addr,rw,locality)
		547	#endif
		548
		549	#define ecb_noinline ecb_attribute ((__noinline__))
		550	#define ecb_noreturn ecb_attribute ((__noreturn__))
		551	#define ecb_unused ecb_attribute ((__unused__))
		552	#define ecb_const ecb_attribute ((__const__))
		553	#define ecb_pure ecb_attribute ((__pure__))
		554
		555	#if ECB_GCC_VERSION(4,3)
		556	#define ecb_artificial ecb_attribute ((__artificial__))
		557	#define ecb_hot ecb_attribute ((__hot__))
		558	#define ecb_cold ecb_attribute ((__cold__))
		559	#else
		560	#define ecb_artificial
		561	#define ecb_hot
		562	#define ecb_cold
		563	#endif
		564
		565	/* put around conditional expressions if you are very sure that the */
		566	/* expression is mostly true or mostly false. note that these return */
		567	/* booleans, not the expression. */
480	#define expect_false(expr) expect ((expr) != 0, 0)	568	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
481	#define expect_true(expr) expect ((expr) != 0, 1)	569	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		570	/* ecb.h end */
		571
		572	#define expect_false(cond) ecb_expect_false (cond)
		573	#define expect_true(cond) ecb_expect_true (cond)
		574	#define noinline ecb_noinline
		575
482	#define inline_size static inline	576	#define inline_size ecb_inline
483		577
484	#if EV_FEATURE_CODE	578	#if EV_FEATURE_CODE
485	# define inline_speed static inline	579	# define inline_speed ecb_inline
486	#else	580	#else
487	# define inline_speed static noinline	581	# define inline_speed static noinline
488	#endif	582	#endif
489		583
490	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	584	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
…		…
581		675
582	#ifdef __linux	676	#ifdef __linux
583	# include <sys/utsname.h>	677	# include <sys/utsname.h>
584	#endif	678	#endif
585		679
586	static unsigned int noinline	680	static unsigned int noinline ecb_cold
587	ev_linux_version (void)	681	ev_linux_version (void)
588	{	682	{
589	#ifdef __linux	683	#ifdef __linux
590	unsigned int v = 0;	684	unsigned int v = 0;
591	struct utsname buf;	685	struct utsname buf;
…		…
620	}	714	}
621		715
622	/*****************************************************************************/	716	/*****************************************************************************/
623		717
624	#if EV_AVOID_STDIO	718	#if EV_AVOID_STDIO
625	static void noinline	719	static void noinline ecb_cold
626	ev_printerr (const char *msg)	720	ev_printerr (const char *msg)
627	{	721	{
628	write (STDERR_FILENO, msg, strlen (msg));	722	write (STDERR_FILENO, msg, strlen (msg));
629	}	723	}
630	#endif	724	#endif
631		725
632	static void (syserr_cb)(const char msg);	726	static void (syserr_cb)(const char msg);
633		727
634	void	728	void ecb_cold
635	ev_set_syserr_cb (void (cb)(const char msg))	729	ev_set_syserr_cb (void (cb)(const char msg))
636	{	730	{
637	syserr_cb = cb;	731	syserr_cb = cb;
638	}	732	}
639		733
640	static void noinline	734	static void noinline ecb_cold
641	ev_syserr (const char *msg)	735	ev_syserr (const char *msg)
642	{	736	{
643	if (!msg)	737	if (!msg)
644	msg = "(libev) system error";	738	msg = "(libev) system error";
645		739
…		…
678	#endif	772	#endif
679	}	773	}
680		774
681	static void (alloc)(void *ptr, long size) = ev_realloc_emul;	775	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
682		776
683	void	777	void ecb_cold
684	ev_set_allocator (void (cb)(void *ptr, long size))	778	ev_set_allocator (void (cb)(void *ptr, long size))
685	{	779	{
686	alloc = cb;	780	alloc = cb;
687	}	781	}
688		782
…		…
870	select (0, 0, 0, 0, &tv);	964	select (0, 0, 0, 0, &tv);
871	#endif	965	#endif
872	}	966	}
873	}	967	}
874		968
875	inline_speed int
876	ev_timeout_to_ms (ev_tstamp timeout)
877	{
878	int ms = timeout * 1000. + .999999;
879
880	return expect_true (ms) ? ms : timeout < 1e-6 ? 0 : 1;
881	}
882
883	/*****************************************************************************/	969	/*****************************************************************************/
884		970
885	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /	971	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /
886		972
887	/* find a suitable new size for the given array, */	973	/* find a suitable new size for the given array, */
…		…
905	}	991	}
906		992
907	return ncur;	993	return ncur;
908	}	994	}
909		995
910	static noinline void *	996	static void * noinline ecb_cold
911	array_realloc (int elem, void base, int cur, int cnt)	997	array_realloc (int elem, void base, int cur, int cnt)
912	{	998	{
913	cur = array_nextsize (elem, cur, cnt);	999	cur = array_nextsize (elem, cur, cnt);
914	return ev_realloc (base, elem * *cur);	1000	return ev_realloc (base, elem * *cur);
915	}	1001	}
…		…
918	memset ((void )(base), 0, sizeof ((base)) * (count))	1004	memset ((void )(base), 0, sizeof ((base)) * (count))
919		1005
920	#define array_needsize(type,base,cur,cnt,init) \	1006	#define array_needsize(type,base,cur,cnt,init) \
921	if (expect_false ((cnt) > (cur))) \	1007	if (expect_false ((cnt) > (cur))) \
922	{ \	1008	{ \
923	int ocur_ = (cur); \	1009	int ecb_unused ocur_ = (cur); \
924	(base) = (type *)array_realloc \	1010	(base) = (type *)array_realloc \
925	(sizeof (type), (base), &(cur), (cnt)); \	1011	(sizeof (type), (base), &(cur), (cnt)); \
926	init ((base) + (ocur_), (cur) - ocur_); \	1012	init ((base) + (ocur_), (cur) - ocur_); \
927	}	1013	}
928		1014
…		…
1034	for (i = 0; i < fdchangecnt; ++i)	1120	for (i = 0; i < fdchangecnt; ++i)
1035	{	1121	{
1036	int fd = fdchanges [i];	1122	int fd = fdchanges [i];
1037	ANFD *anfd = anfds + fd;	1123	ANFD *anfd = anfds + fd;
1038		1124
1039	if (anfd->reify & EV__IOFDSET)	1125	if (anfd->reify & EV__IOFDSET && anfd->head)
1040	{	1126	{
1041	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);	1127	SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1042		1128
1043	if (handle != anfd->handle)	1129	if (handle != anfd->handle)
1044	{	1130	{
…		…
1098	fdchanges [fdchangecnt - 1] = fd;	1184	fdchanges [fdchangecnt - 1] = fd;
1099	}	1185	}
1100	}	1186	}
1101		1187
1102	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */	1188	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1103	inline_speed void	1189	inline_speed void ecb_cold
1104	fd_kill (EV_P_ int fd)	1190	fd_kill (EV_P_ int fd)
1105	{	1191	{
1106	ev_io *w;	1192	ev_io *w;
1107		1193
1108	while ((w = (ev_io *)anfds [fd].head))	1194	while ((w = (ev_io *)anfds [fd].head))
…		…
1111	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);	1197	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
1112	}	1198	}
1113	}	1199	}
1114		1200
1115	/* check whether the given fd is actually valid, for error recovery */	1201	/* check whether the given fd is actually valid, for error recovery */
1116	inline_size int	1202	inline_size int ecb_cold
1117	fd_valid (int fd)	1203	fd_valid (int fd)
1118	{	1204	{
1119	#ifdef _WIN32	1205	#ifdef _WIN32
1120	return EV_FD_TO_WIN32_HANDLE (fd) != -1;	1206	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1121	#else	1207	#else
1122	return fcntl (fd, F_GETFD) != -1;	1208	return fcntl (fd, F_GETFD) != -1;
1123	#endif	1209	#endif
1124	}	1210	}
1125		1211
1126	/* called on EBADF to verify fds */	1212	/* called on EBADF to verify fds */
1127	static void noinline	1213	static void noinline ecb_cold
1128	fd_ebadf (EV_P)	1214	fd_ebadf (EV_P)
1129	{	1215	{
1130	int fd;	1216	int fd;
1131		1217
1132	for (fd = 0; fd < anfdmax; ++fd)	1218	for (fd = 0; fd < anfdmax; ++fd)
…		…
1134	if (!fd_valid (fd) && errno == EBADF)	1220	if (!fd_valid (fd) && errno == EBADF)
1135	fd_kill (EV_A_ fd);	1221	fd_kill (EV_A_ fd);
1136	}	1222	}
1137		1223
1138	/* called on ENOMEM in select/poll to kill some fds and retry */	1224	/* called on ENOMEM in select/poll to kill some fds and retry */
1139	static void noinline	1225	static void noinline ecb_cold
1140	fd_enomem (EV_P)	1226	fd_enomem (EV_P)
1141	{	1227	{
1142	int fd;	1228	int fd;
1143		1229
1144	for (fd = anfdmax; fd--; )	1230	for (fd = anfdmax; fd--; )
…		…
1339		1425
1340	/*****************************************************************************/	1426	/*****************************************************************************/
1341		1427
1342	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE	1428	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE
1343		1429
1344	static void noinline	1430	static void noinline ecb_cold
1345	evpipe_init (EV_P)	1431	evpipe_init (EV_P)
1346	{	1432	{
1347	if (!ev_is_active (&pipe_w))	1433	if (!ev_is_active (&pipe_w))
1348	{	1434	{
1349	# if EV_USE_EVENTFD	1435	# if EV_USE_EVENTFD
…		…
1371	ev_io_start (EV_A_ &pipe_w);	1457	ev_io_start (EV_A_ &pipe_w);
1372	ev_unref (EV_A); /* watcher should not keep loop alive */	1458	ev_unref (EV_A); /* watcher should not keep loop alive */
1373	}	1459	}
1374	}	1460	}
1375		1461
1376	inline_size void	1462	inline_speed void
1377	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1463	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1378	{	1464	{
1379	if (!*flag)	1465	if (expect_true (*flag))
		1466	return;
		1467
		1468	*flag = 1;
		1469
		1470	ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
		1471
		1472	pipe_write_skipped = 1;
		1473
		1474	ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
		1475
		1476	if (pipe_write_wanted)
1380	{	1477	{
		1478	int old_errno;
		1479
		1480	pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
		1481
1381	int old_errno = errno; /* save errno because write might clobber it */	1482	old_errno = errno; /* save errno because write will clobber it */
1382	char dummy;
1383
1384	*flag = 1;
1385		1483
1386	#if EV_USE_EVENTFD	1484	#if EV_USE_EVENTFD
1387	if (evfd >= 0)	1485	if (evfd >= 0)
1388	{	1486	{
1389	uint64_t counter = 1;	1487	uint64_t counter = 1;
1390	write (evfd, &counter, sizeof (uint64_t));	1488	write (evfd, &counter, sizeof (uint64_t));
1391	}	1489	}
1392	else	1490	else
1393	#endif	1491	#endif
		1492	{
1394	/* win32 people keep sending patches that change this write() to send() */	1493	/* win32 people keep sending patches that change this write() to send() */
1395	/* and then run away. but send() is wrong, it wants a socket handle on win32 */	1494	/* and then run away. but send() is wrong, it wants a socket handle on win32 */
1396	/* so when you think this write should be a send instead, please find out */	1495	/* so when you think this write should be a send instead, please find out */
1397	/* where your send() is from - it's definitely not the microsoft send, and */	1496	/* where your send() is from - it's definitely not the microsoft send, and */
1398	/* tell me. thank you. */	1497	/* tell me. thank you. */
1399	write (evpipe [1], &dummy, 1);	1498	write (evpipe [1], &(evpipe [1]), 1);
		1499	}
1400		1500
1401	errno = old_errno;	1501	errno = old_errno;
1402	}	1502	}
1403	}	1503	}
1404		1504
…		…
1407	static void	1507	static void
1408	pipecb (EV_P_ ev_io *iow, int revents)	1508	pipecb (EV_P_ ev_io *iow, int revents)
1409	{	1509	{
1410	int i;	1510	int i;
1411		1511
		1512	if (revents & EV_READ)
		1513	{
1412	#if EV_USE_EVENTFD	1514	#if EV_USE_EVENTFD
1413	if (evfd >= 0)	1515	if (evfd >= 0)
1414	{	1516	{
1415	uint64_t counter;	1517	uint64_t counter;
1416	read (evfd, &counter, sizeof (uint64_t));	1518	read (evfd, &counter, sizeof (uint64_t));
1417	}	1519	}
1418	else	1520	else
1419	#endif	1521	#endif
1420	{	1522	{
1421	char dummy;	1523	char dummy;
1422	/* see discussion in evpipe_write when you think this read should be recv in win32 */	1524	/* see discussion in evpipe_write when you think this read should be recv in win32 */
1423	read (evpipe [0], &dummy, 1);	1525	read (evpipe [0], &dummy, 1);
		1526	}
1424	}	1527	}
		1528
		1529	pipe_write_skipped = 0;
1425		1530
1426	#if EV_SIGNAL_ENABLE	1531	#if EV_SIGNAL_ENABLE
1427	if (sig_pending)	1532	if (sig_pending)
1428	{	1533	{
1429	sig_pending = 0;	1534	sig_pending = 0;
…		…
1458	EV_P = signals [signum - 1].loop;	1563	EV_P = signals [signum - 1].loop;
1459		1564
1460	if (!EV_A)	1565	if (!EV_A)
1461	return;	1566	return;
1462	#endif	1567	#endif
		1568
		1569	if (!ev_active (&pipe_w))
		1570	return;
1463		1571
1464	signals [signum - 1].pending = 1;	1572	signals [signum - 1].pending = 1;
1465	evpipe_write (EV_A_ &sig_pending);	1573	evpipe_write (EV_A_ &sig_pending);
1466	}	1574	}
1467		1575
…		…
1599	#endif	1707	#endif
1600	#if EV_USE_SELECT	1708	#if EV_USE_SELECT
1601	# include "ev_select.c"	1709	# include "ev_select.c"
1602	#endif	1710	#endif
1603		1711
1604	int	1712	int ecb_cold
1605	ev_version_major (void)	1713	ev_version_major (void)
1606	{	1714	{
1607	return EV_VERSION_MAJOR;	1715	return EV_VERSION_MAJOR;
1608	}	1716	}
1609		1717
1610	int	1718	int ecb_cold
1611	ev_version_minor (void)	1719	ev_version_minor (void)
1612	{	1720	{
1613	return EV_VERSION_MINOR;	1721	return EV_VERSION_MINOR;
1614	}	1722	}
1615		1723
1616	/* return true if we are running with elevated privileges and should ignore env variables */	1724	/* return true if we are running with elevated privileges and should ignore env variables */
1617	int inline_size	1725	int inline_size ecb_cold
1618	enable_secure (void)	1726	enable_secure (void)
1619	{	1727	{
1620	#ifdef _WIN32	1728	#ifdef _WIN32
1621	return 0;	1729	return 0;
1622	#else	1730	#else
1623	return getuid () != geteuid ()	1731	return getuid () != geteuid ()
1624	\|\| getgid () != getegid ();	1732	\|\| getgid () != getegid ();
1625	#endif	1733	#endif
1626	}	1734	}
1627		1735
1628	unsigned int	1736	unsigned int ecb_cold
1629	ev_supported_backends (void)	1737	ev_supported_backends (void)
1630	{	1738	{
1631	unsigned int flags = 0;	1739	unsigned int flags = 0;
1632		1740
1633	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;	1741	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
…		…
1637	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;	1745	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
1638		1746
1639	return flags;	1747	return flags;
1640	}	1748	}
1641		1749
1642	unsigned int	1750	unsigned int ecb_cold
1643	ev_recommended_backends (void)	1751	ev_recommended_backends (void)
1644	{	1752	{
1645	unsigned int flags = ev_supported_backends ();	1753	unsigned int flags = ev_supported_backends ();
1646		1754
1647	#ifndef __NetBSD__	1755	#ifndef __NetBSD__
…		…
1659	#endif	1767	#endif
1660		1768
1661	return flags;	1769	return flags;
1662	}	1770	}
1663		1771
1664	unsigned int	1772	unsigned int ecb_cold
1665	ev_embeddable_backends (void)	1773	ev_embeddable_backends (void)
1666	{	1774	{
1667	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;	1775	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
1668		1776
1669	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */	1777	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
…		…
1714	ev_userdata (EV_P)	1822	ev_userdata (EV_P)
1715	{	1823	{
1716	return userdata;	1824	return userdata;
1717	}	1825	}
1718		1826
		1827	void
1719	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))	1828	ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1720	{	1829	{
1721	invoke_cb = invoke_pending_cb;	1830	invoke_cb = invoke_pending_cb;
1722	}	1831	}
1723		1832
		1833	void
1724	void ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))	1834	ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))
1725	{	1835	{
1726	release_cb = release;	1836	release_cb = release;
1727	acquire_cb = acquire;	1837	acquire_cb = acquire;
1728	}	1838	}
1729	#endif	1839	#endif
1730		1840
1731	/* initialise a loop structure, must be zero-initialised */	1841	/* initialise a loop structure, must be zero-initialised */
1732	static void noinline	1842	static void noinline ecb_cold
1733	loop_init (EV_P_ unsigned int flags)	1843	loop_init (EV_P_ unsigned int flags)
1734	{	1844	{
1735	if (!backend)	1845	if (!backend)
1736	{	1846	{
1737	origflags = flags;	1847	origflags = flags;
…		…
1765	if (!(flags & EVFLAG_NOENV)	1875	if (!(flags & EVFLAG_NOENV)
1766	&& !enable_secure ()	1876	&& !enable_secure ()
1767	&& getenv ("LIBEV_FLAGS"))	1877	&& getenv ("LIBEV_FLAGS"))
1768	flags = atoi (getenv ("LIBEV_FLAGS"));	1878	flags = atoi (getenv ("LIBEV_FLAGS"));
1769		1879
1770	ev_rt_now = ev_time ();	1880	ev_rt_now = ev_time ();
1771	mn_now = get_clock ();	1881	mn_now = get_clock ();
1772	now_floor = mn_now;	1882	now_floor = mn_now;
1773	rtmn_diff = ev_rt_now - mn_now;	1883	rtmn_diff = ev_rt_now - mn_now;
1774	#if EV_FEATURE_API	1884	#if EV_FEATURE_API
1775	invoke_cb = ev_invoke_pending;	1885	invoke_cb = ev_invoke_pending;
1776	#endif	1886	#endif
1777		1887
1778	io_blocktime = 0.;	1888	io_blocktime = 0.;
1779	timeout_blocktime = 0.;	1889	timeout_blocktime = 0.;
1780	backend = 0;	1890	backend = 0;
1781	backend_fd = -1;	1891	backend_fd = -1;
1782	sig_pending = 0;	1892	sig_pending = 0;
1783	#if EV_ASYNC_ENABLE	1893	#if EV_ASYNC_ENABLE
1784	async_pending = 0;	1894	async_pending = 0;
1785	#endif	1895	#endif
		1896	pipe_write_skipped = 0;
		1897	pipe_write_wanted = 0;
1786	#if EV_USE_INOTIFY	1898	#if EV_USE_INOTIFY
1787	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;	1899	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1788	#endif	1900	#endif
1789	#if EV_USE_SIGNALFD	1901	#if EV_USE_SIGNALFD
1790	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;	1902	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1791	#endif	1903	#endif
1792		1904
1793	if (!(flags & EVBACKEND_MASK))	1905	if (!(flags & EVBACKEND_MASK))
1794	flags \|= ev_recommended_backends ();	1906	flags \|= ev_recommended_backends ();
1795		1907
…		…
1820	#endif	1932	#endif
1821	}	1933	}
1822	}	1934	}
1823		1935
1824	/* free up a loop structure */	1936	/* free up a loop structure */
1825	void	1937	void ecb_cold
1826	ev_loop_destroy (EV_P)	1938	ev_loop_destroy (EV_P)
1827	{	1939	{
1828	int i;	1940	int i;
1829		1941
1830	#if EV_MULTIPLICITY	1942	#if EV_MULTIPLICITY
…		…
1960	infy_fork (EV_A);	2072	infy_fork (EV_A);
1961	#endif	2073	#endif
1962		2074
1963	if (ev_is_active (&pipe_w))	2075	if (ev_is_active (&pipe_w))
1964	{	2076	{
1965	/* this "locks" the handlers against writing to the pipe */	2077	/* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1966	/* while we modify the fd vars */
1967	sig_pending = 1;
1968	#if EV_ASYNC_ENABLE
1969	async_pending = 1;
1970	#endif
1971		2078
1972	ev_ref (EV_A);	2079	ev_ref (EV_A);
1973	ev_io_stop (EV_A_ &pipe_w);	2080	ev_io_stop (EV_A_ &pipe_w);
1974		2081
1975	#if EV_USE_EVENTFD	2082	#if EV_USE_EVENTFD
…		…
1993	postfork = 0;	2100	postfork = 0;
1994	}	2101	}
1995		2102
1996	#if EV_MULTIPLICITY	2103	#if EV_MULTIPLICITY
1997		2104
1998	struct ev_loop *	2105	struct ev_loop * ecb_cold
1999	ev_loop_new (unsigned int flags)	2106	ev_loop_new (unsigned int flags)
2000	{	2107	{
2001	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	2108	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2002		2109
2003	memset (EV_A, 0, sizeof (struct ev_loop));	2110	memset (EV_A, 0, sizeof (struct ev_loop));
…		…
2011	}	2118	}
2012		2119
2013	#endif /* multiplicity */	2120	#endif /* multiplicity */
2014		2121
2015	#if EV_VERIFY	2122	#if EV_VERIFY
2016	static void noinline	2123	static void noinline ecb_cold
2017	verify_watcher (EV_P_ W w)	2124	verify_watcher (EV_P_ W w)
2018	{	2125	{
2019	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	2126	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2020		2127
2021	if (w->pending)	2128	if (w->pending)
2022	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	2129	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2023	}	2130	}
2024		2131
2025	static void noinline	2132	static void noinline ecb_cold
2026	verify_heap (EV_P_ ANHE *heap, int N)	2133	verify_heap (EV_P_ ANHE *heap, int N)
2027	{	2134	{
2028	int i;	2135	int i;
2029		2136
2030	for (i = HEAP0; i < N + HEAP0; ++i)	2137	for (i = HEAP0; i < N + HEAP0; ++i)
…		…
2035		2142
2036	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	2143	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2037	}	2144	}
2038	}	2145	}
2039		2146
2040	static void noinline	2147	static void noinline ecb_cold
2041	array_verify (EV_P_ W *ws, int cnt)	2148	array_verify (EV_P_ W *ws, int cnt)
2042	{	2149	{
2043	while (cnt--)	2150	while (cnt--)
2044	{	2151	{
2045	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));	2152	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
…		…
2047	}	2154	}
2048	}	2155	}
2049	#endif	2156	#endif
2050		2157
2051	#if EV_FEATURE_API	2158	#if EV_FEATURE_API
2052	void	2159	void ecb_cold
2053	ev_verify (EV_P)	2160	ev_verify (EV_P)
2054	{	2161	{
2055	#if EV_VERIFY	2162	#if EV_VERIFY
2056	int i;	2163	int i;
2057	WL w;	2164	WL w;
…		…
2123	#endif	2230	#endif
2124	}	2231	}
2125	#endif	2232	#endif
2126		2233
2127	#if EV_MULTIPLICITY	2234	#if EV_MULTIPLICITY
2128	struct ev_loop *	2235	struct ev_loop * ecb_cold
2129	#else	2236	#else
2130	int	2237	int
2131	#endif	2238	#endif
2132	ev_default_loop (unsigned int flags)	2239	ev_default_loop (unsigned int flags)
2133	{	2240	{
…		…
2332	}	2439	}
2333	}	2440	}
2334		2441
2335	/* simply recalculate all periodics */	2442	/* simply recalculate all periodics */
2336	/* TODO: maybe ensure that at least one event happens when jumping forward? */	2443	/* TODO: maybe ensure that at least one event happens when jumping forward? */
2337	static void noinline	2444	static void noinline ecb_cold
2338	periodics_reschedule (EV_P)	2445	periodics_reschedule (EV_P)
2339	{	2446	{
2340	int i;	2447	int i;
2341		2448
2342	/* adjust periodics after time jump */	2449	/* adjust periodics after time jump */
…		…
2355	reheap (periodics, periodiccnt);	2462	reheap (periodics, periodiccnt);
2356	}	2463	}
2357	#endif	2464	#endif
2358		2465
2359	/* adjust all timers by a given offset */	2466	/* adjust all timers by a given offset */
2360	static void noinline	2467	static void noinline ecb_cold
2361	timers_reschedule (EV_P_ ev_tstamp adjust)	2468	timers_reschedule (EV_P_ ev_tstamp adjust)
2362	{	2469	{
2363	int i;	2470	int i;
2364		2471
2365	for (i = 0; i < timercnt; ++i)	2472	for (i = 0; i < timercnt; ++i)
…		…
2507	ev_tstamp prev_mn_now = mn_now;	2614	ev_tstamp prev_mn_now = mn_now;
2508		2615
2509	/* update time to cancel out callback processing overhead */	2616	/* update time to cancel out callback processing overhead */
2510	time_update (EV_A_ 1e100);	2617	time_update (EV_A_ 1e100);
2511		2618
		2619	/* from now on, we want a pipe-wake-up */
		2620	pipe_write_wanted = 1;
		2621
		2622	ECB_MEMORY_FENCE; /* amke sure pipe_write_wanted is visible before we check for potential skips */
		2623
2512	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt)))	2624	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt \|\| pipe_write_skipped)))
2513	{	2625	{
2514	waittime = MAX_BLOCKTIME;	2626	waittime = MAX_BLOCKTIME;
2515		2627
2516	if (timercnt)	2628	if (timercnt)
2517	{	2629	{
2518	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;	2630	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2519	if (waittime > to) waittime = to;	2631	if (waittime > to) waittime = to;
2520	}	2632	}
2521		2633
2522	#if EV_PERIODIC_ENABLE	2634	#if EV_PERIODIC_ENABLE
2523	if (periodiccnt)	2635	if (periodiccnt)
2524	{	2636	{
2525	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2637	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2526	if (waittime > to) waittime = to;	2638	if (waittime > to) waittime = to;
2527	}	2639	}
2528	#endif	2640	#endif
2529		2641
2530	/* don't let timeouts decrease the waittime below timeout_blocktime */	2642	/* don't let timeouts decrease the waittime below timeout_blocktime */
2531	if (expect_false (waittime < timeout_blocktime))	2643	if (expect_false (waittime < timeout_blocktime))
2532	waittime = timeout_blocktime;	2644	waittime = timeout_blocktime;
		2645
		2646	/* at this point, we NEED to wait, so we have to ensure */
		2647	/* to pass a minimum nonzero value to the backend */
		2648	if (expect_false (waittime < backend_mintime))
		2649	waittime = backend_mintime;
2533		2650
2534	/* extra check because io_blocktime is commonly 0 */	2651	/* extra check because io_blocktime is commonly 0 */
2535	if (expect_false (io_blocktime))	2652	if (expect_false (io_blocktime))
2536	{	2653	{
2537	sleeptime = io_blocktime - (mn_now - prev_mn_now);	2654	sleeptime = io_blocktime - (mn_now - prev_mn_now);
2538		2655
2539	if (sleeptime > waittime - backend_fudge)	2656	if (sleeptime > waittime - backend_mintime)
2540	sleeptime = waittime - backend_fudge;	2657	sleeptime = waittime - backend_mintime;
2541		2658
2542	if (expect_true (sleeptime > 0.))	2659	if (expect_true (sleeptime > 0.))
2543	{	2660	{
2544	ev_sleep (sleeptime);	2661	ev_sleep (sleeptime);
2545	waittime -= sleeptime;	2662	waittime -= sleeptime;
…		…
2551	++loop_count;	2668	++loop_count;
2552	#endif	2669	#endif
2553	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */	2670	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2554	backend_poll (EV_A_ waittime);	2671	backend_poll (EV_A_ waittime);
2555	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */	2672	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
		2673
		2674	pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
		2675
		2676	if (pipe_write_skipped)
		2677	{
		2678	assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
		2679	ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
		2680	}
		2681
2556		2682
2557	/* update ev_rt_now, do magic */	2683	/* update ev_rt_now, do magic */
2558	time_update (EV_A_ waittime + sleeptime);	2684	time_update (EV_A_ waittime + sleeptime);
2559	}	2685	}
2560		2686
…		…
3214	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3340	infy_wd (EV_A_ ev->wd, ev->wd, ev);
3215	ofs += sizeof (struct inotify_event) + ev->len;	3341	ofs += sizeof (struct inotify_event) + ev->len;
3216	}	3342	}
3217	}	3343	}
3218		3344
3219	inline_size void	3345	inline_size void ecb_cold
3220	ev_check_2625 (EV_P)	3346	ev_check_2625 (EV_P)
3221	{	3347	{
3222	/* kernels < 2.6.25 are borked	3348	/* kernels < 2.6.25 are borked
3223	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3349	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3224	*/	3350	*/
…		…
3849	}	3975	}
3850		3976
3851	/*****************************************************************************/	3977	/*****************************************************************************/
3852		3978
3853	#if EV_WALK_ENABLE	3979	#if EV_WALK_ENABLE
3854	void	3980	void ecb_cold
3855	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))	3981	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))
3856	{	3982	{
3857	int i, j;	3983	int i, j;
3858	ev_watcher_list wl, wn;	3984	ev_watcher_list wl, wn;
3859		3985

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Comparing libev/ev.c (file contents): Revision 1.373 by root, Sun Feb 20 02:56:23 2011 UTC vs. Revision 1.388 by root, Fri Jul 29 12:17:26 2011 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.373 by root, Sun Feb 20 02:56:23 2011 UTC vs.
Revision 1.388 by root, Fri Jul 29 12:17:26 2011 UTC