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

Comparing libev/ev.c (file contents):
Revision 1.374 by root, Sat Feb 26 15:21:01 2011 UTC vs.
Revision 1.384 by root, Wed Jul 20 00:58:45 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
		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) && defined(MemoryBarrier)
		521	#define ECB_MEMORY_FENCE MemoryBarrier ()
		522	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		523	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		524	#endif
		525	#endif
		526
		527	#ifndef ECB_MEMORY_FENCE
		528	#include <pthread.h>
		529
		530	static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
		531	#define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
		532	#define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
		533	#define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
		534	#endif
		535
		536	#if ECB_GCC_VERSION(3,1)
		537	#define ecb_attribute(attrlist) __attribute__(attrlist)
		538	#define ecb_is_constant(expr) __builtin_constant_p (expr)
		539	#define ecb_expect(expr,value) __builtin_expect ((expr),(value))
		540	#define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
		541	#else
		542	#define ecb_attribute(attrlist)
		543	#define ecb_is_constant(expr) 0
		544	#define ecb_expect(expr,value) (expr)
		545	#define ecb_prefetch(addr,rw,locality)
		546	#endif
		547
		548	#define ecb_noinline ecb_attribute ((__noinline__))
		549	#define ecb_noreturn ecb_attribute ((__noreturn__))
		550	#define ecb_unused ecb_attribute ((__unused__))
		551	#define ecb_const ecb_attribute ((__const__))
		552	#define ecb_pure ecb_attribute ((__pure__))
		553
		554	#if ECB_GCC_VERSION(4,3)
		555	#define ecb_artificial ecb_attribute ((__artificial__))
		556	#define ecb_hot ecb_attribute ((__hot__))
		557	#define ecb_cold ecb_attribute ((__cold__))
		558	#else
		559	#define ecb_artificial
		560	#define ecb_hot
		561	#define ecb_cold
		562	#endif
		563
		564	/* put around conditional expressions if you are very sure that the */
		565	/* expression is mostly true or mostly false. note that these return */
		566	/* booleans, not the expression. */
480	#define expect_false(expr) expect ((expr) != 0, 0)	567	#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
481	#define expect_true(expr) expect ((expr) != 0, 1)	568	#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
		569	/* ecb.h end */
		570
		571	#define expect_false(cond) ecb_expect_false (cond)
		572	#define expect_true(cond) ecb_expect_true (cond)
		573	#define noinline ecb_noinline
		574
482	#define inline_size static inline	575	#define inline_size ecb_inline
483		576
484	#if EV_FEATURE_CODE	577	#if EV_FEATURE_CODE
485	# define inline_speed static inline	578	# define inline_speed ecb_inline
486	#else	579	#else
487	# define inline_speed static noinline	580	# define inline_speed static noinline
488	#endif	581	#endif
489		582
490	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	583	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
…		…
581		674
582	#ifdef __linux	675	#ifdef __linux
583	# include <sys/utsname.h>	676	# include <sys/utsname.h>
584	#endif	677	#endif
585		678
586	static unsigned int noinline	679	static unsigned int noinline ecb_cold
587	ev_linux_version (void)	680	ev_linux_version (void)
588	{	681	{
589	#ifdef __linux	682	#ifdef __linux
590	unsigned int v = 0;	683	unsigned int v = 0;
591	struct utsname buf;	684	struct utsname buf;
…		…
620	}	713	}
621		714
622	/*****************************************************************************/	715	/*****************************************************************************/
623		716
624	#if EV_AVOID_STDIO	717	#if EV_AVOID_STDIO
625	static void noinline	718	static void noinline ecb_cold
626	ev_printerr (const char *msg)	719	ev_printerr (const char *msg)
627	{	720	{
628	write (STDERR_FILENO, msg, strlen (msg));	721	write (STDERR_FILENO, msg, strlen (msg));
629	}	722	}
630	#endif	723	#endif
631		724
632	static void (syserr_cb)(const char msg);	725	static void (syserr_cb)(const char msg);
633		726
634	void	727	void ecb_cold
635	ev_set_syserr_cb (void (cb)(const char msg))	728	ev_set_syserr_cb (void (cb)(const char msg))
636	{	729	{
637	syserr_cb = cb;	730	syserr_cb = cb;
638	}	731	}
639		732
640	static void noinline	733	static void noinline ecb_cold
641	ev_syserr (const char *msg)	734	ev_syserr (const char *msg)
642	{	735	{
643	if (!msg)	736	if (!msg)
644	msg = "(libev) system error";	737	msg = "(libev) system error";
645		738
…		…
678	#endif	771	#endif
679	}	772	}
680		773
681	static void (alloc)(void *ptr, long size) = ev_realloc_emul;	774	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
682		775
683	void	776	void ecb_cold
684	ev_set_allocator (void (cb)(void *ptr, long size))	777	ev_set_allocator (void (cb)(void *ptr, long size))
685	{	778	{
686	alloc = cb;	779	alloc = cb;
687	}	780	}
688		781
…		…
870	select (0, 0, 0, 0, &tv);	963	select (0, 0, 0, 0, &tv);
871	#endif	964	#endif
872	}	965	}
873	}	966	}
874		967
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	/*****************************************************************************/	968	/*****************************************************************************/
884		969
885	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /	970	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /
886		971
887	/* find a suitable new size for the given array, */	972	/* find a suitable new size for the given array, */
…		…
905	}	990	}
906		991
907	return ncur;	992	return ncur;
908	}	993	}
909		994
910	static noinline void *	995	static void * noinline ecb_cold
911	array_realloc (int elem, void base, int cur, int cnt)	996	array_realloc (int elem, void base, int cur, int cnt)
912	{	997	{
913	cur = array_nextsize (elem, cur, cnt);	998	cur = array_nextsize (elem, cur, cnt);
914	return ev_realloc (base, elem * *cur);	999	return ev_realloc (base, elem * *cur);
915	}	1000	}
…		…
918	memset ((void )(base), 0, sizeof ((base)) * (count))	1003	memset ((void )(base), 0, sizeof ((base)) * (count))
919		1004
920	#define array_needsize(type,base,cur,cnt,init) \	1005	#define array_needsize(type,base,cur,cnt,init) \
921	if (expect_false ((cnt) > (cur))) \	1006	if (expect_false ((cnt) > (cur))) \
922	{ \	1007	{ \
923	int ocur_ = (cur); \	1008	int ecb_unused ocur_ = (cur); \
924	(base) = (type *)array_realloc \	1009	(base) = (type *)array_realloc \
925	(sizeof (type), (base), &(cur), (cnt)); \	1010	(sizeof (type), (base), &(cur), (cnt)); \
926	init ((base) + (ocur_), (cur) - ocur_); \	1011	init ((base) + (ocur_), (cur) - ocur_); \
927	}	1012	}
928		1013
…		…
1098	fdchanges [fdchangecnt - 1] = fd;	1183	fdchanges [fdchangecnt - 1] = fd;
1099	}	1184	}
1100	}	1185	}
1101		1186
1102	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */	1187	/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1103	inline_speed void	1188	inline_speed void ecb_cold
1104	fd_kill (EV_P_ int fd)	1189	fd_kill (EV_P_ int fd)
1105	{	1190	{
1106	ev_io *w;	1191	ev_io *w;
1107		1192
1108	while ((w = (ev_io *)anfds [fd].head))	1193	while ((w = (ev_io *)anfds [fd].head))
…		…
1111	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);	1196	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
1112	}	1197	}
1113	}	1198	}
1114		1199
1115	/* check whether the given fd is actually valid, for error recovery */	1200	/* check whether the given fd is actually valid, for error recovery */
1116	inline_size int	1201	inline_size int ecb_cold
1117	fd_valid (int fd)	1202	fd_valid (int fd)
1118	{	1203	{
1119	#ifdef _WIN32	1204	#ifdef _WIN32
1120	return EV_FD_TO_WIN32_HANDLE (fd) != -1;	1205	return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1121	#else	1206	#else
1122	return fcntl (fd, F_GETFD) != -1;	1207	return fcntl (fd, F_GETFD) != -1;
1123	#endif	1208	#endif
1124	}	1209	}
1125		1210
1126	/* called on EBADF to verify fds */	1211	/* called on EBADF to verify fds */
1127	static void noinline	1212	static void noinline ecb_cold
1128	fd_ebadf (EV_P)	1213	fd_ebadf (EV_P)
1129	{	1214	{
1130	int fd;	1215	int fd;
1131		1216
1132	for (fd = 0; fd < anfdmax; ++fd)	1217	for (fd = 0; fd < anfdmax; ++fd)
…		…
1134	if (!fd_valid (fd) && errno == EBADF)	1219	if (!fd_valid (fd) && errno == EBADF)
1135	fd_kill (EV_A_ fd);	1220	fd_kill (EV_A_ fd);
1136	}	1221	}
1137		1222
1138	/* called on ENOMEM in select/poll to kill some fds and retry */	1223	/* called on ENOMEM in select/poll to kill some fds and retry */
1139	static void noinline	1224	static void noinline ecb_cold
1140	fd_enomem (EV_P)	1225	fd_enomem (EV_P)
1141	{	1226	{
1142	int fd;	1227	int fd;
1143		1228
1144	for (fd = anfdmax; fd--; )	1229	for (fd = anfdmax; fd--; )
…		…
1339		1424
1340	/*****************************************************************************/	1425	/*****************************************************************************/
1341		1426
1342	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE	1427	#if EV_SIGNAL_ENABLE \|\| EV_ASYNC_ENABLE
1343		1428
1344	static void noinline	1429	static void noinline ecb_cold
1345	evpipe_init (EV_P)	1430	evpipe_init (EV_P)
1346	{	1431	{
1347	if (!ev_is_active (&pipe_w))	1432	if (!ev_is_active (&pipe_w))
1348	{	1433	{
1349	# if EV_USE_EVENTFD	1434	# if EV_USE_EVENTFD
…		…
1371	ev_io_start (EV_A_ &pipe_w);	1456	ev_io_start (EV_A_ &pipe_w);
1372	ev_unref (EV_A); /* watcher should not keep loop alive */	1457	ev_unref (EV_A); /* watcher should not keep loop alive */
1373	}	1458	}
1374	}	1459	}
1375		1460
1376	inline_size void	1461	inline_speed void
1377	evpipe_write (EV_P_ EV_ATOMIC_T *flag)	1462	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1378	{	1463	{
1379	if (!*flag)	1464	if (expect_true (*flag))
		1465	return;
		1466
		1467	*flag = 1;
		1468
		1469	ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
		1470
		1471	pipe_write_skipped = 1;
		1472
		1473	ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
		1474
		1475	if (pipe_write_wanted)
1380	{	1476	{
		1477	int old_errno;
		1478
		1479	pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
		1480
1381	int old_errno = errno; /* save errno because write might clobber it */	1481	old_errno = errno; /* save errno because write will clobber it */
1382	char dummy;
1383
1384	*flag = 1;
1385		1482
1386	#if EV_USE_EVENTFD	1483	#if EV_USE_EVENTFD
1387	if (evfd >= 0)	1484	if (evfd >= 0)
1388	{	1485	{
1389	uint64_t counter = 1;	1486	uint64_t counter = 1;
1390	write (evfd, &counter, sizeof (uint64_t));	1487	write (evfd, &counter, sizeof (uint64_t));
1391	}	1488	}
1392	else	1489	else
1393	#endif	1490	#endif
		1491	{
1394	/* win32 people keep sending patches that change this write() to send() */	1492	/* 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 */	1493	/* 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 */	1494	/* 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 */	1495	/* where your send() is from - it's definitely not the microsoft send, and */
1398	/* tell me. thank you. */	1496	/* tell me. thank you. */
1399	write (evpipe [1], &dummy, 1);	1497	write (evpipe [1], &(evpipe [1]), 1);
		1498	}
1400		1499
1401	errno = old_errno;	1500	errno = old_errno;
1402	}	1501	}
1403	}	1502	}
1404		1503
…		…
1407	static void	1506	static void
1408	pipecb (EV_P_ ev_io *iow, int revents)	1507	pipecb (EV_P_ ev_io *iow, int revents)
1409	{	1508	{
1410	int i;	1509	int i;
1411		1510
		1511	if (revents & EV_READ)
		1512	{
1412	#if EV_USE_EVENTFD	1513	#if EV_USE_EVENTFD
1413	if (evfd >= 0)	1514	if (evfd >= 0)
1414	{	1515	{
1415	uint64_t counter;	1516	uint64_t counter;
1416	read (evfd, &counter, sizeof (uint64_t));	1517	read (evfd, &counter, sizeof (uint64_t));
1417	}	1518	}
1418	else	1519	else
1419	#endif	1520	#endif
1420	{	1521	{
1421	char dummy;	1522	char dummy;
1422	/* see discussion in evpipe_write when you think this read should be recv in win32 */	1523	/* see discussion in evpipe_write when you think this read should be recv in win32 */
1423	read (evpipe [0], &dummy, 1);	1524	read (evpipe [0], &dummy, 1);
		1525	}
1424	}	1526	}
		1527
		1528	pipe_write_skipped = 0;
1425		1529
1426	#if EV_SIGNAL_ENABLE	1530	#if EV_SIGNAL_ENABLE
1427	if (sig_pending)	1531	if (sig_pending)
1428	{	1532	{
1429	sig_pending = 0;	1533	sig_pending = 0;
…		…
1458	EV_P = signals [signum - 1].loop;	1562	EV_P = signals [signum - 1].loop;
1459		1563
1460	if (!EV_A)	1564	if (!EV_A)
1461	return;	1565	return;
1462	#endif	1566	#endif
		1567
		1568	if (!ev_active (&pipe_w))
		1569	return;
1463		1570
1464	signals [signum - 1].pending = 1;	1571	signals [signum - 1].pending = 1;
1465	evpipe_write (EV_A_ &sig_pending);	1572	evpipe_write (EV_A_ &sig_pending);
1466	}	1573	}
1467		1574
…		…
1599	#endif	1706	#endif
1600	#if EV_USE_SELECT	1707	#if EV_USE_SELECT
1601	# include "ev_select.c"	1708	# include "ev_select.c"
1602	#endif	1709	#endif
1603		1710
1604	int	1711	int ecb_cold
1605	ev_version_major (void)	1712	ev_version_major (void)
1606	{	1713	{
1607	return EV_VERSION_MAJOR;	1714	return EV_VERSION_MAJOR;
1608	}	1715	}
1609		1716
1610	int	1717	int ecb_cold
1611	ev_version_minor (void)	1718	ev_version_minor (void)
1612	{	1719	{
1613	return EV_VERSION_MINOR;	1720	return EV_VERSION_MINOR;
1614	}	1721	}
1615		1722
1616	/* return true if we are running with elevated privileges and should ignore env variables */	1723	/* return true if we are running with elevated privileges and should ignore env variables */
1617	int inline_size	1724	int inline_size ecb_cold
1618	enable_secure (void)	1725	enable_secure (void)
1619	{	1726	{
1620	#ifdef _WIN32	1727	#ifdef _WIN32
1621	return 0;	1728	return 0;
1622	#else	1729	#else
1623	return getuid () != geteuid ()	1730	return getuid () != geteuid ()
1624	\|\| getgid () != getegid ();	1731	\|\| getgid () != getegid ();
1625	#endif	1732	#endif
1626	}	1733	}
1627		1734
1628	unsigned int	1735	unsigned int ecb_cold
1629	ev_supported_backends (void)	1736	ev_supported_backends (void)
1630	{	1737	{
1631	unsigned int flags = 0;	1738	unsigned int flags = 0;
1632		1739
1633	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;	1740	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
…		…
1637	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;	1744	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
1638		1745
1639	return flags;	1746	return flags;
1640	}	1747	}
1641		1748
1642	unsigned int	1749	unsigned int ecb_cold
1643	ev_recommended_backends (void)	1750	ev_recommended_backends (void)
1644	{	1751	{
1645	unsigned int flags = ev_supported_backends ();	1752	unsigned int flags = ev_supported_backends ();
1646		1753
1647	#ifndef __NetBSD__	1754	#ifndef __NetBSD__
…		…
1659	#endif	1766	#endif
1660		1767
1661	return flags;	1768	return flags;
1662	}	1769	}
1663		1770
1664	unsigned int	1771	unsigned int ecb_cold
1665	ev_embeddable_backends (void)	1772	ev_embeddable_backends (void)
1666	{	1773	{
1667	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;	1774	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
1668		1775
1669	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */	1776	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
…		…
1714	ev_userdata (EV_P)	1821	ev_userdata (EV_P)
1715	{	1822	{
1716	return userdata;	1823	return userdata;
1717	}	1824	}
1718		1825
		1826	void
1719	void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))	1827	ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1720	{	1828	{
1721	invoke_cb = invoke_pending_cb;	1829	invoke_cb = invoke_pending_cb;
1722	}	1830	}
1723		1831
		1832	void
1724	void ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))	1833	ev_set_loop_release_cb (EV_P_ void (release)(EV_P), void (acquire)(EV_P))
1725	{	1834	{
1726	release_cb = release;	1835	release_cb = release;
1727	acquire_cb = acquire;	1836	acquire_cb = acquire;
1728	}	1837	}
1729	#endif	1838	#endif
1730		1839
1731	/* initialise a loop structure, must be zero-initialised */	1840	/* initialise a loop structure, must be zero-initialised */
1732	static void noinline	1841	static void noinline ecb_cold
1733	loop_init (EV_P_ unsigned int flags)	1842	loop_init (EV_P_ unsigned int flags)
1734	{	1843	{
1735	if (!backend)	1844	if (!backend)
1736	{	1845	{
1737	origflags = flags;	1846	origflags = flags;
…		…
1765	if (!(flags & EVFLAG_NOENV)	1874	if (!(flags & EVFLAG_NOENV)
1766	&& !enable_secure ()	1875	&& !enable_secure ()
1767	&& getenv ("LIBEV_FLAGS"))	1876	&& getenv ("LIBEV_FLAGS"))
1768	flags = atoi (getenv ("LIBEV_FLAGS"));	1877	flags = atoi (getenv ("LIBEV_FLAGS"));
1769		1878
1770	ev_rt_now = ev_time ();	1879	ev_rt_now = ev_time ();
1771	mn_now = get_clock ();	1880	mn_now = get_clock ();
1772	now_floor = mn_now;	1881	now_floor = mn_now;
1773	rtmn_diff = ev_rt_now - mn_now;	1882	rtmn_diff = ev_rt_now - mn_now;
1774	#if EV_FEATURE_API	1883	#if EV_FEATURE_API
1775	invoke_cb = ev_invoke_pending;	1884	invoke_cb = ev_invoke_pending;
1776	#endif	1885	#endif
1777		1886
1778	io_blocktime = 0.;	1887	io_blocktime = 0.;
1779	timeout_blocktime = 0.;	1888	timeout_blocktime = 0.;
1780	backend = 0;	1889	backend = 0;
1781	backend_fd = -1;	1890	backend_fd = -1;
1782	sig_pending = 0;	1891	sig_pending = 0;
1783	#if EV_ASYNC_ENABLE	1892	#if EV_ASYNC_ENABLE
1784	async_pending = 0;	1893	async_pending = 0;
1785	#endif	1894	#endif
		1895	pipe_write_skipped = 0;
		1896	pipe_write_wanted = 0;
1786	#if EV_USE_INOTIFY	1897	#if EV_USE_INOTIFY
1787	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;	1898	fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1788	#endif	1899	#endif
1789	#if EV_USE_SIGNALFD	1900	#if EV_USE_SIGNALFD
1790	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;	1901	sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1791	#endif	1902	#endif
1792		1903
1793	if (!(flags & EVBACKEND_MASK))	1904	if (!(flags & EVBACKEND_MASK))
1794	flags \|= ev_recommended_backends ();	1905	flags \|= ev_recommended_backends ();
1795		1906
…		…
1820	#endif	1931	#endif
1821	}	1932	}
1822	}	1933	}
1823		1934
1824	/* free up a loop structure */	1935	/* free up a loop structure */
1825	void	1936	void ecb_cold
1826	ev_loop_destroy (EV_P)	1937	ev_loop_destroy (EV_P)
1827	{	1938	{
1828	int i;	1939	int i;
1829		1940
1830	#if EV_MULTIPLICITY	1941	#if EV_MULTIPLICITY
…		…
1960	infy_fork (EV_A);	2071	infy_fork (EV_A);
1961	#endif	2072	#endif
1962		2073
1963	if (ev_is_active (&pipe_w))	2074	if (ev_is_active (&pipe_w))
1964	{	2075	{
1965	/* this "locks" the handlers against writing to the pipe */	2076	/* 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		2077
1972	ev_ref (EV_A);	2078	ev_ref (EV_A);
1973	ev_io_stop (EV_A_ &pipe_w);	2079	ev_io_stop (EV_A_ &pipe_w);
1974		2080
1975	#if EV_USE_EVENTFD	2081	#if EV_USE_EVENTFD
…		…
1993	postfork = 0;	2099	postfork = 0;
1994	}	2100	}
1995		2101
1996	#if EV_MULTIPLICITY	2102	#if EV_MULTIPLICITY
1997		2103
1998	struct ev_loop *	2104	struct ev_loop * ecb_cold
1999	ev_loop_new (unsigned int flags)	2105	ev_loop_new (unsigned int flags)
2000	{	2106	{
2001	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	2107	EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2002		2108
2003	memset (EV_A, 0, sizeof (struct ev_loop));	2109	memset (EV_A, 0, sizeof (struct ev_loop));
…		…
2011	}	2117	}
2012		2118
2013	#endif /* multiplicity */	2119	#endif /* multiplicity */
2014		2120
2015	#if EV_VERIFY	2121	#if EV_VERIFY
2016	static void noinline	2122	static void noinline ecb_cold
2017	verify_watcher (EV_P_ W w)	2123	verify_watcher (EV_P_ W w)
2018	{	2124	{
2019	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));	2125	assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2020		2126
2021	if (w->pending)	2127	if (w->pending)
2022	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));	2128	assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2023	}	2129	}
2024		2130
2025	static void noinline	2131	static void noinline ecb_cold
2026	verify_heap (EV_P_ ANHE *heap, int N)	2132	verify_heap (EV_P_ ANHE *heap, int N)
2027	{	2133	{
2028	int i;	2134	int i;
2029		2135
2030	for (i = HEAP0; i < N + HEAP0; ++i)	2136	for (i = HEAP0; i < N + HEAP0; ++i)
…		…
2035		2141
2036	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));	2142	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2037	}	2143	}
2038	}	2144	}
2039		2145
2040	static void noinline	2146	static void noinline ecb_cold
2041	array_verify (EV_P_ W *ws, int cnt)	2147	array_verify (EV_P_ W *ws, int cnt)
2042	{	2148	{
2043	while (cnt--)	2149	while (cnt--)
2044	{	2150	{
2045	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));	2151	assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
…		…
2047	}	2153	}
2048	}	2154	}
2049	#endif	2155	#endif
2050		2156
2051	#if EV_FEATURE_API	2157	#if EV_FEATURE_API
2052	void	2158	void ecb_cold
2053	ev_verify (EV_P)	2159	ev_verify (EV_P)
2054	{	2160	{
2055	#if EV_VERIFY	2161	#if EV_VERIFY
2056	int i;	2162	int i;
2057	WL w;	2163	WL w;
…		…
2123	#endif	2229	#endif
2124	}	2230	}
2125	#endif	2231	#endif
2126		2232
2127	#if EV_MULTIPLICITY	2233	#if EV_MULTIPLICITY
2128	struct ev_loop *	2234	struct ev_loop * ecb_cold
2129	#else	2235	#else
2130	int	2236	int
2131	#endif	2237	#endif
2132	ev_default_loop (unsigned int flags)	2238	ev_default_loop (unsigned int flags)
2133	{	2239	{
…		…
2332	}	2438	}
2333	}	2439	}
2334		2440
2335	/* simply recalculate all periodics */	2441	/* simply recalculate all periodics */
2336	/* TODO: maybe ensure that at least one event happens when jumping forward? */	2442	/* TODO: maybe ensure that at least one event happens when jumping forward? */
2337	static void noinline	2443	static void noinline ecb_cold
2338	periodics_reschedule (EV_P)	2444	periodics_reschedule (EV_P)
2339	{	2445	{
2340	int i;	2446	int i;
2341		2447
2342	/* adjust periodics after time jump */	2448	/* adjust periodics after time jump */
…		…
2355	reheap (periodics, periodiccnt);	2461	reheap (periodics, periodiccnt);
2356	}	2462	}
2357	#endif	2463	#endif
2358		2464
2359	/* adjust all timers by a given offset */	2465	/* adjust all timers by a given offset */
2360	static void noinline	2466	static void noinline ecb_cold
2361	timers_reschedule (EV_P_ ev_tstamp adjust)	2467	timers_reschedule (EV_P_ ev_tstamp adjust)
2362	{	2468	{
2363	int i;	2469	int i;
2364		2470
2365	for (i = 0; i < timercnt; ++i)	2471	for (i = 0; i < timercnt; ++i)
…		…
2507	ev_tstamp prev_mn_now = mn_now;	2613	ev_tstamp prev_mn_now = mn_now;
2508		2614
2509	/* update time to cancel out callback processing overhead */	2615	/* update time to cancel out callback processing overhead */
2510	time_update (EV_A_ 1e100);	2616	time_update (EV_A_ 1e100);
2511		2617
		2618	/* from now on, we want a pipe-wake-up */
		2619	pipe_write_wanted = 1;
		2620
		2621	ECB_MEMORY_FENCE; /* amke sure pipe_write_wanted is visible before we check for potential skips */
		2622
2512	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt)))	2623	if (expect_true (!(flags & EVRUN_NOWAIT \|\| idleall \|\| !activecnt \|\| pipe_write_skipped)))
2513	{	2624	{
2514	waittime = MAX_BLOCKTIME;	2625	waittime = MAX_BLOCKTIME;
2515		2626
2516	if (timercnt)	2627	if (timercnt)
2517	{	2628	{
2518	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;	2629	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2519	if (waittime > to) waittime = to;	2630	if (waittime > to) waittime = to;
2520	}	2631	}
2521		2632
2522	#if EV_PERIODIC_ENABLE	2633	#if EV_PERIODIC_ENABLE
2523	if (periodiccnt)	2634	if (periodiccnt)
2524	{	2635	{
2525	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;	2636	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2526	if (waittime > to) waittime = to;	2637	if (waittime > to) waittime = to;
2527	}	2638	}
2528	#endif	2639	#endif
2529		2640
2530	/* don't let timeouts decrease the waittime below timeout_blocktime */	2641	/* don't let timeouts decrease the waittime below timeout_blocktime */
2531	if (expect_false (waittime < timeout_blocktime))	2642	if (expect_false (waittime < timeout_blocktime))
2532	waittime = timeout_blocktime;	2643	waittime = timeout_blocktime;
		2644
		2645	/* at this point, we NEED to wait, so we have to ensure */
		2646	/* to pass a minimum nonzero value to the backend */
		2647	if (expect_false (waittime < backend_mintime))
		2648	waittime = backend_mintime;
2533		2649
2534	/* extra check because io_blocktime is commonly 0 */	2650	/* extra check because io_blocktime is commonly 0 */
2535	if (expect_false (io_blocktime))	2651	if (expect_false (io_blocktime))
2536	{	2652	{
2537	sleeptime = io_blocktime - (mn_now - prev_mn_now);	2653	sleeptime = io_blocktime - (mn_now - prev_mn_now);
2538		2654
2539	if (sleeptime > waittime - backend_fudge)	2655	if (sleeptime > waittime - backend_mintime)
2540	sleeptime = waittime - backend_fudge;	2656	sleeptime = waittime - backend_mintime;
2541		2657
2542	if (expect_true (sleeptime > 0.))	2658	if (expect_true (sleeptime > 0.))
2543	{	2659	{
2544	ev_sleep (sleeptime);	2660	ev_sleep (sleeptime);
2545	waittime -= sleeptime;	2661	waittime -= sleeptime;
…		…
2551	++loop_count;	2667	++loop_count;
2552	#endif	2668	#endif
2553	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */	2669	assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2554	backend_poll (EV_A_ waittime);	2670	backend_poll (EV_A_ waittime);
2555	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */	2671	assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
		2672
		2673	pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
		2674
		2675	if (pipe_write_skipped)
		2676	{
		2677	assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
		2678	ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
		2679	}
		2680
2556		2681
2557	/* update ev_rt_now, do magic */	2682	/* update ev_rt_now, do magic */
2558	time_update (EV_A_ waittime + sleeptime);	2683	time_update (EV_A_ waittime + sleeptime);
2559	}	2684	}
2560		2685
…		…
3214	infy_wd (EV_A_ ev->wd, ev->wd, ev);	3339	infy_wd (EV_A_ ev->wd, ev->wd, ev);
3215	ofs += sizeof (struct inotify_event) + ev->len;	3340	ofs += sizeof (struct inotify_event) + ev->len;
3216	}	3341	}
3217	}	3342	}
3218		3343
3219	inline_size void	3344	inline_size void ecb_cold
3220	ev_check_2625 (EV_P)	3345	ev_check_2625 (EV_P)
3221	{	3346	{
3222	/* kernels < 2.6.25 are borked	3347	/* kernels < 2.6.25 are borked
3223	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html	3348	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3224	*/	3349	*/
…		…
3849	}	3974	}
3850		3975
3851	/*****************************************************************************/	3976	/*****************************************************************************/
3852		3977
3853	#if EV_WALK_ENABLE	3978	#if EV_WALK_ENABLE
3854	void	3979	void ecb_cold
3855	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))	3980	ev_walk (EV_P_ int types, void (cb)(EV_P_ int type, void w))
3856	{	3981	{
3857	int i, j;	3982	int i, j;
3858	ev_watcher_list wl, wn;	3983	ev_watcher_list wl, wn;
3859		3984

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Comparing libev/ev.c (file contents): Revision 1.374 by root, Sat Feb 26 15:21:01 2011 UTC vs. Revision 1.384 by root, Wed Jul 20 00:58:45 2011 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.374 by root, Sat Feb 26 15:21:01 2011 UTC vs.
Revision 1.384 by root, Wed Jul 20 00:58:45 2011 UTC