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

Comparing libev/ev.c (file contents):
Revision 1.188 by root, Thu Dec 20 07:12:57 2007 UTC vs.
Revision 1.200 by root, Wed Dec 26 08:06:09 2007 UTC

…		…
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* modification, are permitted provided that the following conditions are	8	* tion, are permitted provided that the following conditions are met:
9	* met:	9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
10	*	27	*
11	* * Redistributions of source code must retain the above copyright	28	* Alternatively, the contents of this file may be used under the terms of
12	* notice, this list of conditions and the following disclaimer.	29	* the GNU General Public License ("GPL") version 2 or any later version,
13	*	30	* in which case the provisions of the GPL are applicable instead of
14	* * Redistributions in binary form must reproduce the above	31	* the above. If you wish to allow the use of your version of this file
15	* copyright notice, this list of conditions and the following	32	* only under the terms of the GPL and not to allow others to use your
16	* disclaimer in the documentation and/or other materials provided	33	* version of this file under the BSD license, indicate your decision
17	* with the distribution.	34	* by deleting the provisions above and replace them with the notice
18	*	35	* and other provisions required by the GPL. If you do not delete the
19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	36	* provisions above, a recipient may use your version of this file under
20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	37	* either the BSD or the GPL.
21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30	*/	38	*/
31		39
32	#ifdef __cplusplus	40	#ifdef __cplusplus
33	extern "C" {	41	extern "C" {
34	#endif	42	#endif
…		…
51	# ifndef EV_USE_MONOTONIC	59	# ifndef EV_USE_MONOTONIC
52	# define EV_USE_MONOTONIC 0	60	# define EV_USE_MONOTONIC 0
53	# endif	61	# endif
54	# ifndef EV_USE_REALTIME	62	# ifndef EV_USE_REALTIME
55	# define EV_USE_REALTIME 0	63	# define EV_USE_REALTIME 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_NANOSLEEP
		68	# if HAVE_NANOSLEEP
		69	# define EV_USE_NANOSLEEP 1
		70	# else
		71	# define EV_USE_NANOSLEEP 0
56	# endif	72	# endif
57	# endif	73	# endif
58		74
59	# ifndef EV_USE_SELECT	75	# ifndef EV_USE_SELECT
60	# if HAVE_SELECT && HAVE_SYS_SELECT_H	76	# if HAVE_SELECT && HAVE_SYS_SELECT_H
…		…
146		162
147	#ifndef EV_USE_REALTIME	163	#ifndef EV_USE_REALTIME
148	# define EV_USE_REALTIME 0	164	# define EV_USE_REALTIME 0
149	#endif	165	#endif
150		166
		167	#ifndef EV_USE_NANOSLEEP
		168	# define EV_USE_NANOSLEEP 0
		169	#endif
		170
151	#ifndef EV_USE_SELECT	171	#ifndef EV_USE_SELECT
152	# define EV_USE_SELECT 1	172	# define EV_USE_SELECT 1
153	#endif	173	#endif
154		174
155	#ifndef EV_USE_POLL	175	#ifndef EV_USE_POLL
…		…
205	#endif	225	#endif
206		226
207	#if !EV_STAT_ENABLE	227	#if !EV_STAT_ENABLE
208	# undef EV_USE_INOTIFY	228	# undef EV_USE_INOTIFY
209	# define EV_USE_INOTIFY 0	229	# define EV_USE_INOTIFY 0
		230	#endif
		231
		232	#if !EV_USE_NANOSLEEP
		233	# ifndef _WIN32
		234	# include <sys/select.h>
		235	# endif
210	#endif	236	#endif
211		237
212	#if EV_USE_INOTIFY	238	#if EV_USE_INOTIFY
213	# include <sys/inotify.h>	239	# include <sys/inotify.h>
214	#endif	240	#endif
…		…
262		288
263	typedef ev_watcher *W;	289	typedef ev_watcher *W;
264	typedef ev_watcher_list *WL;	290	typedef ev_watcher_list *WL;
265	typedef ev_watcher_time *WT;	291	typedef ev_watcher_time *WT;
266		292
		293	#if EV_USE_MONOTONIC
		294	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		295	/* giving it a reasonably high chance of working on typical architetcures */
267	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	296	static sig_atomic_t have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		297	#endif
268		298
269	#ifdef _WIN32	299	#ifdef _WIN32
270	# include "ev_win32.c"	300	# include "ev_win32.c"
271	#endif	301	#endif
272		302
…		…
408	{	438	{
409	return ev_rt_now;	439	return ev_rt_now;
410	}	440	}
411	#endif	441	#endif
412		442
		443	void
		444	ev_sleep (ev_tstamp delay)
		445	{
		446	if (delay > 0.)
		447	{
		448	#if EV_USE_NANOSLEEP
		449	struct timespec ts;
		450
		451	ts.tv_sec = (time_t)delay;
		452	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		453
		454	nanosleep (&ts, 0);
		455	#elif defined(_WIN32)
		456	Sleep (delay * 1e3);
		457	#else
		458	struct timeval tv;
		459
		460	tv.tv_sec = (time_t)delay;
		461	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		462
		463	select (0, 0, 0, 0, &tv);
		464	#endif
		465	}
		466	}
		467
		468	/*****************************************************************************/
		469
413	int inline_size	470	int inline_size
414	array_nextsize (int elem, int cur, int cnt)	471	array_nextsize (int elem, int cur, int cnt)
415	{	472	{
416	int ncur = cur + 1;	473	int ncur = cur + 1;
417		474
…		…
543		600
544	#if EV_SELECT_IS_WINSOCKET	601	#if EV_SELECT_IS_WINSOCKET
545	if (events)	602	if (events)
546	{	603	{
547	unsigned long argp;	604	unsigned long argp;
		605	#ifdef EV_FD_TO_WIN32_HANDLE
		606	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		607	#else
548	anfd->handle = _get_osfhandle (fd);	608	anfd->handle = _get_osfhandle (fd);
		609	#endif
549	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));	610	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
550	}	611	}
551	#endif	612	#endif
552		613
553	{	614	{
…		…
925	}	986	}
926		987
927	unsigned int	988	unsigned int
928	ev_embeddable_backends (void)	989	ev_embeddable_backends (void)
929	{	990	{
930	return EVBACKEND_EPOLL	991	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
931	\| EVBACKEND_KQUEUE	992
932	\| EVBACKEND_PORT;	993	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		994	/* please fix it and tell me how to detect the fix */
		995	flags &= ~EVBACKEND_EPOLL;
		996
		997	return flags;
933	}	998	}
934		999
935	unsigned int	1000	unsigned int
936	ev_backend (EV_P)	1001	ev_backend (EV_P)
937	{	1002	{
…		…
940		1005
941	unsigned int	1006	unsigned int
942	ev_loop_count (EV_P)	1007	ev_loop_count (EV_P)
943	{	1008	{
944	return loop_count;	1009	return loop_count;
		1010	}
		1011
		1012	void
		1013	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1014	{
		1015	io_blocktime = interval;
		1016	}
		1017
		1018	void
		1019	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1020	{
		1021	timeout_blocktime = interval;
945	}	1022	}
946		1023
947	static void noinline	1024	static void noinline
948	loop_init (EV_P_ unsigned int flags)	1025	loop_init (EV_P_ unsigned int flags)
949	{	1026	{
…		…
959		1036
960	ev_rt_now = ev_time ();	1037	ev_rt_now = ev_time ();
961	mn_now = get_clock ();	1038	mn_now = get_clock ();
962	now_floor = mn_now;	1039	now_floor = mn_now;
963	rtmn_diff = ev_rt_now - mn_now;	1040	rtmn_diff = ev_rt_now - mn_now;
		1041
		1042	io_blocktime = 0.;
		1043	timeout_blocktime = 0.;
964		1044
965	/* pid check not overridable via env */	1045	/* pid check not overridable via env */
966	#ifndef _WIN32	1046	#ifndef _WIN32
967	if (flags & EVFLAG_FORKCHECK)	1047	if (flags & EVFLAG_FORKCHECK)
968	curpid = getpid ();	1048	curpid = getpid ();
…		…
1456	/* update fd-related kernel structures */	1536	/* update fd-related kernel structures */
1457	fd_reify (EV_A);	1537	fd_reify (EV_A);
1458		1538
1459	/* calculate blocking time */	1539	/* calculate blocking time */
1460	{	1540	{
1461	ev_tstamp block;	1541	ev_tstamp waittime = 0.;
		1542	ev_tstamp sleeptime = 0.;
1462		1543
1463	if (expect_false (flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt))	1544	if (expect_true (!(flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt)))
1464	block = 0.; /* do not block at all */
1465	else
1466	{	1545	{
1467	/* update time to cancel out callback processing overhead */	1546	/* update time to cancel out callback processing overhead */
1468	time_update (EV_A_ 1e100);	1547	time_update (EV_A_ 1e100);
1469		1548
1470	block = MAX_BLOCKTIME;	1549	waittime = MAX_BLOCKTIME;
1471		1550
1472	if (timercnt)	1551	if (timercnt)
1473	{	1552	{
1474	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;	1553	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
1475	if (block > to) block = to;	1554	if (waittime > to) waittime = to;
1476	}	1555	}
1477		1556
1478	#if EV_PERIODIC_ENABLE	1557	#if EV_PERIODIC_ENABLE
1479	if (periodiccnt)	1558	if (periodiccnt)
1480	{	1559	{
1481	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;	1560	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
1482	if (block > to) block = to;	1561	if (waittime > to) waittime = to;
1483	}	1562	}
1484	#endif	1563	#endif
1485		1564
1486	if (expect_false (block < 0.)) block = 0.;	1565	if (expect_false (waittime < timeout_blocktime))
		1566	waittime = timeout_blocktime;
		1567
		1568	sleeptime = waittime - backend_fudge;
		1569
		1570	if (expect_true (sleeptime > io_blocktime))
		1571	sleeptime = io_blocktime;
		1572
		1573	if (sleeptime)
		1574	{
		1575	ev_sleep (sleeptime);
		1576	waittime -= sleeptime;
		1577	}
1487	}	1578	}
1488		1579
1489	++loop_count;	1580	++loop_count;
1490	backend_poll (EV_A_ block);	1581	backend_poll (EV_A_ waittime);
1491		1582
1492	/* update ev_rt_now, do magic */	1583	/* update ev_rt_now, do magic */
1493	time_update (EV_A_ block);	1584	time_update (EV_A_ waittime + sleeptime);
1494	}	1585	}
1495		1586
1496	/* queue pending timers and reschedule them */	1587	/* queue pending timers and reschedule them */
1497	timers_reify (EV_A); /* relative timers called last */	1588	timers_reify (EV_A); /* relative timers called last */
1498	#if EV_PERIODIC_ENABLE	1589	#if EV_PERIODIC_ENABLE
…		…
2186	{	2277	{
2187	ev_loop (w->other, EVLOOP_NONBLOCK);	2278	ev_loop (w->other, EVLOOP_NONBLOCK);
2188	}	2279	}
2189		2280
2190	static void	2281	static void
2191	embed_cb (EV_P_ ev_io *io, int revents)	2282	embed_io_cb (EV_P_ ev_io *io, int revents)
2192	{	2283	{
2193	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));	2284	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
2194		2285
2195	if (ev_cb (w))	2286	if (ev_cb (w))
2196	ev_feed_event (EV_A_ (W)w, EV_EMBED);	2287	ev_feed_event (EV_A_ (W)w, EV_EMBED);
2197	else	2288	else
2198	ev_embed_sweep (loop, w);	2289	ev_loop (w->other, EVLOOP_NONBLOCK);
2199	}	2290	}
		2291
		2292	static void
		2293	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2294	{
		2295	ev_embed w = (ev_embed )(((char *)prepare) - offsetof (ev_embed, prepare));
		2296
		2297	{
		2298	struct ev_loop *loop = w->other;
		2299
		2300	while (fdchangecnt)
		2301	{
		2302	fd_reify (EV_A);
		2303	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2304	}
		2305	}
		2306	}
		2307
		2308	#if 0
		2309	static void
		2310	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2311	{
		2312	ev_idle_stop (EV_A_ idle);
		2313	}
		2314	#endif
2200		2315
2201	void	2316	void
2202	ev_embed_start (EV_P_ ev_embed *w)	2317	ev_embed_start (EV_P_ ev_embed *w)
2203	{	2318	{
2204	if (expect_false (ev_is_active (w)))	2319	if (expect_false (ev_is_active (w)))
2205	return;	2320	return;
2206		2321
2207	{	2322	{
2208	struct ev_loop *loop = w->other;	2323	struct ev_loop *loop = w->other;
2209	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	2324	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2210	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);	2325	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2211	}	2326	}
2212		2327
2213	ev_set_priority (&w->io, ev_priority (w));	2328	ev_set_priority (&w->io, ev_priority (w));
2214	ev_io_start (EV_A_ &w->io);	2329	ev_io_start (EV_A_ &w->io);
2215		2330
		2331	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2332	ev_set_priority (&w->prepare, EV_MINPRI);
		2333	ev_prepare_start (EV_A_ &w->prepare);
		2334
		2335	/ev_idle_init (&w->idle, e,bed_idle_cb);/
		2336
2216	ev_start (EV_A_ (W)w, 1);	2337	ev_start (EV_A_ (W)w, 1);
2217	}	2338	}
2218		2339
2219	void	2340	void
2220	ev_embed_stop (EV_P_ ev_embed *w)	2341	ev_embed_stop (EV_P_ ev_embed *w)
…		…
2222	clear_pending (EV_A_ (W)w);	2343	clear_pending (EV_A_ (W)w);
2223	if (expect_false (!ev_is_active (w)))	2344	if (expect_false (!ev_is_active (w)))
2224	return;	2345	return;
2225		2346
2226	ev_io_stop (EV_A_ &w->io);	2347	ev_io_stop (EV_A_ &w->io);
		2348	ev_prepare_stop (EV_A_ &w->prepare);
2227		2349
2228	ev_stop (EV_A_ (W)w);	2350	ev_stop (EV_A_ (W)w);
2229	}	2351	}
2230	#endif	2352	#endif
2231		2353

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Comparing libev/ev.c (file contents): Revision 1.188 by root, Thu Dec 20 07:12:57 2007 UTC vs. Revision 1.200 by root, Wed Dec 26 08:06:09 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.188 by root, Thu Dec 20 07:12:57 2007 UTC vs.
Revision 1.200 by root, Wed Dec 26 08:06:09 2007 UTC