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

Comparing libev/ev.c (file contents):
Revision 1.148 by root, Tue Nov 27 11:11:13 2007 UTC vs.
Revision 1.206 by root, Fri Jan 25 15:45:08 2008 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
…		…
94	# else	110	# else
95	# define EV_USE_PORT 0	111	# define EV_USE_PORT 0
96	# endif	112	# endif
97	# endif	113	# endif
98		114
		115	# ifndef EV_USE_INOTIFY
		116	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		117	# define EV_USE_INOTIFY 1
		118	# else
		119	# define EV_USE_INOTIFY 0
		120	# endif
		121	# endif
		122
99	#endif	123	#endif
100		124
101	#include <math.h>	125	#include <math.h>
102	#include <stdlib.h>	126	#include <stdlib.h>
103	#include <fcntl.h>	127	#include <fcntl.h>
…		…
109	#include <errno.h>	133	#include <errno.h>
110	#include <sys/types.h>	134	#include <sys/types.h>
111	#include <time.h>	135	#include <time.h>
112		136
113	#include <signal.h>	137	#include <signal.h>
		138
		139	#ifdef EV_H
		140	# include EV_H
		141	#else
		142	# include "ev.h"
		143	#endif
114		144
115	#ifndef _WIN32	145	#ifndef _WIN32
116	# include <sys/time.h>	146	# include <sys/time.h>
117	# include <sys/wait.h>	147	# include <sys/wait.h>
118	# include <unistd.h>	148	# include <unistd.h>
…		…
132		162
133	#ifndef EV_USE_REALTIME	163	#ifndef EV_USE_REALTIME
134	# define EV_USE_REALTIME 0	164	# define EV_USE_REALTIME 0
135	#endif	165	#endif
136		166
		167	#ifndef EV_USE_NANOSLEEP
		168	# define EV_USE_NANOSLEEP 0
		169	#endif
		170
137	#ifndef EV_USE_SELECT	171	#ifndef EV_USE_SELECT
138	# define EV_USE_SELECT 1	172	# define EV_USE_SELECT 1
139	#endif	173	#endif
140		174
141	#ifndef EV_USE_POLL	175	#ifndef EV_USE_POLL
…		…
156		190
157	#ifndef EV_USE_PORT	191	#ifndef EV_USE_PORT
158	# define EV_USE_PORT 0	192	# define EV_USE_PORT 0
159	#endif	193	#endif
160		194
		195	#ifndef EV_USE_INOTIFY
		196	# define EV_USE_INOTIFY 0
		197	#endif
		198
		199	#ifndef EV_PID_HASHSIZE
		200	# if EV_MINIMAL
		201	# define EV_PID_HASHSIZE 1
		202	# else
		203	# define EV_PID_HASHSIZE 16
		204	# endif
		205	#endif
		206
		207	#ifndef EV_INOTIFY_HASHSIZE
		208	# if EV_MINIMAL
		209	# define EV_INOTIFY_HASHSIZE 1
		210	# else
		211	# define EV_INOTIFY_HASHSIZE 16
		212	# endif
		213	#endif
		214
161	/**/	215	/**/
162		216
163	#ifndef CLOCK_MONOTONIC	217	#ifndef CLOCK_MONOTONIC
164	# undef EV_USE_MONOTONIC	218	# undef EV_USE_MONOTONIC
165	# define EV_USE_MONOTONIC 0	219	# define EV_USE_MONOTONIC 0
…		…
168	#ifndef CLOCK_REALTIME	222	#ifndef CLOCK_REALTIME
169	# undef EV_USE_REALTIME	223	# undef EV_USE_REALTIME
170	# define EV_USE_REALTIME 0	224	# define EV_USE_REALTIME 0
171	#endif	225	#endif
172		226
		227	#if !EV_STAT_ENABLE
		228	# undef EV_USE_INOTIFY
		229	# define EV_USE_INOTIFY 0
		230	#endif
		231
		232	#if !EV_USE_NANOSLEEP
		233	# ifndef _WIN32
		234	# include <sys/select.h>
		235	# endif
		236	#endif
		237
		238	#if EV_USE_INOTIFY
		239	# include <sys/inotify.h>
		240	#endif
		241
173	#if EV_SELECT_IS_WINSOCKET	242	#if EV_SELECT_IS_WINSOCKET
174	# include <winsock.h>	243	# include <winsock.h>
175	#endif	244	#endif
176		245
177	/**/	246	/**/
178		247
		248	/*
		249	* This is used to avoid floating point rounding problems.
		250	* It is added to ev_rt_now when scheduling periodics
		251	* to ensure progress, time-wise, even when rounding
		252	* errors are against us.
		253	* This value is good at least till the year 4000.
		254	* Better solutions welcome.
		255	*/
		256	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
		257
179	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	258	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
180	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	259	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
181	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
182	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds */	260	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds, TODO */
183		261
184	#ifdef EV_H
185	# include EV_H
186	#else
187	# include "ev.h"
188	#endif
189
190	#if __GNUC__ >= 3	262	#if __GNUC__ >= 4
191	# define expect(expr,value) __builtin_expect ((expr),(value))	263	# define expect(expr,value) __builtin_expect ((expr),(value))
192	# define inline_size static inline /* inline for codesize */
193	# if EV_MINIMAL
194	# define noinline __attribute__ ((noinline))	264	# define noinline __attribute__ ((noinline))
195	# define inline_speed static noinline
196	# else
197	# define noinline
198	# define inline_speed static inline
199	# endif
200	#else	265	#else
201	# define expect(expr,value) (expr)	266	# define expect(expr,value) (expr)
202	# define inline_speed static
203	# define inline_size static
204	# define noinline	267	# define noinline
		268	# if __STDC_VERSION__ < 199901L
		269	# define inline
		270	# endif
205	#endif	271	#endif
206		272
207	#define expect_false(expr) expect ((expr) != 0, 0)	273	#define expect_false(expr) expect ((expr) != 0, 0)
208	#define expect_true(expr) expect ((expr) != 0, 1)	274	#define expect_true(expr) expect ((expr) != 0, 1)
		275	#define inline_size static inline
		276
		277	#if EV_MINIMAL
		278	# define inline_speed static noinline
		279	#else
		280	# define inline_speed static inline
		281	#endif
209		282
210	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	283	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
211	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	284	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
212		285
213	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */	286	#define EMPTY /* required for microsofts broken pseudo-c compiler */
214	#define EMPTY2(a,b) /* used to suppress some warnings */	287	#define EMPTY2(a,b) /* used to suppress some warnings */
215		288
216	typedef ev_watcher *W;	289	typedef ev_watcher *W;
217	typedef ev_watcher_list *WL;	290	typedef ev_watcher_list *WL;
218	typedef ev_watcher_time *WT;	291	typedef ev_watcher_time *WT;
219		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 */
220	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
221		298
222	#ifdef _WIN32	299	#ifdef _WIN32
223	# include "ev_win32.c"	300	# include "ev_win32.c"
224	#endif	301	#endif
225		302
…		…
254	ev_set_allocator (void (cb)(void *ptr, long size))	331	ev_set_allocator (void (cb)(void *ptr, long size))
255	{	332	{
256	alloc = cb;	333	alloc = cb;
257	}	334	}
258		335
259	static void *	336	inline_speed void *
260	ev_realloc (void *ptr, long size)	337	ev_realloc (void *ptr, long size)
261	{	338	{
262	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	339	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
263		340
264	if (!ptr && size)	341	if (!ptr && size)
…		…
288	typedef struct	365	typedef struct
289	{	366	{
290	W w;	367	W w;
291	int events;	368	int events;
292	} ANPENDING;	369	} ANPENDING;
		370
		371	#if EV_USE_INOTIFY
		372	typedef struct
		373	{
		374	WL head;
		375	} ANFS;
		376	#endif
293		377
294	#if EV_MULTIPLICITY	378	#if EV_MULTIPLICITY
295		379
296	struct ev_loop	380	struct ev_loop
297	{	381	{
…		…
354	{	438	{
355	return ev_rt_now;	439	return ev_rt_now;
356	}	440	}
357	#endif	441	#endif
358		442
359	#define array_roundsize(type,n) (((n) \| 4) & ~3)	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
		470	int inline_size
		471	array_nextsize (int elem, int cur, int cnt)
		472	{
		473	int ncur = cur + 1;
		474
		475	do
		476	ncur <<= 1;
		477	while (cnt > ncur);
		478
		479	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		480	if (elem * ncur > 4096)
		481	{
		482	ncur *= elem;
		483	ncur = (ncur + elem + 4095 + sizeof (void ) 4) & ~4095;
		484	ncur = ncur - sizeof (void ) 4;
		485	ncur /= elem;
		486	}
		487
		488	return ncur;
		489	}
		490
		491	static noinline void *
		492	array_realloc (int elem, void base, int cur, int cnt)
		493	{
		494	cur = array_nextsize (elem, cur, cnt);
		495	return ev_realloc (base, elem * *cur);
		496	}
360		497
361	#define array_needsize(type,base,cur,cnt,init) \	498	#define array_needsize(type,base,cur,cnt,init) \
362	if (expect_false ((cnt) > cur)) \	499	if (expect_false ((cnt) > (cur))) \
363	{ \	500	{ \
364	int newcnt = cur; \	501	int ocur_ = (cur); \
365	do \	502	(base) = (type *)array_realloc \
366	{ \	503	(sizeof (type), (base), &(cur), (cnt)); \
367	newcnt = array_roundsize (type, newcnt << 1); \	504	init ((base) + (ocur_), (cur) - ocur_); \
368	} \
369	while ((cnt) > newcnt); \
370	\
371	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
372	init (base + cur, newcnt - cur); \
373	cur = newcnt; \
374	}	505	}
375		506
		507	#if 0
376	#define array_slim(type,stem) \	508	#define array_slim(type,stem) \
377	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \	509	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
378	{ \	510	{ \
379	stem ## max = array_roundsize (stem ## cnt >> 1); \	511	stem ## max = array_roundsize (stem ## cnt >> 1); \
380	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\	512	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
381	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\	513	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
382	}	514	}
		515	#endif
383		516
384	#define array_free(stem, idx) \	517	#define array_free(stem, idx) \
385	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	518	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
386		519
387	/*****************************************************************************/	520	/*****************************************************************************/
388		521
389	void noinline	522	void noinline
390	ev_feed_event (EV_P_ void *w, int revents)	523	ev_feed_event (EV_P_ void *w, int revents)
391	{	524	{
392	W w_ = (W)w;	525	W w_ = (W)w;
		526	int pri = ABSPRI (w_);
393		527
394	if (expect_false (w_->pending))	528	if (expect_false (w_->pending))
		529	pendings [pri][w_->pending - 1].events \|= revents;
		530	else
395	{	531	{
		532	w_->pending = ++pendingcnt [pri];
		533	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		534	pendings [pri][w_->pending - 1].w = w_;
396	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;	535	pendings [pri][w_->pending - 1].events = revents;
397	return;
398	}	536	}
399
400	w_->pending = ++pendingcnt [ABSPRI (w_)];
401	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
402	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
403	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
404	}	537	}
405		538
406	void inline_size	539	void inline_speed
407	queue_events (EV_P_ W *events, int eventcnt, int type)	540	queue_events (EV_P_ W *events, int eventcnt, int type)
408	{	541	{
409	int i;	542	int i;
410		543
411	for (i = 0; i < eventcnt; ++i)	544	for (i = 0; i < eventcnt; ++i)
…		…
443	}	576	}
444		577
445	void	578	void
446	ev_feed_fd_event (EV_P_ int fd, int revents)	579	ev_feed_fd_event (EV_P_ int fd, int revents)
447	{	580	{
		581	if (fd >= 0 && fd < anfdmax)
448	fd_event (EV_A_ fd, revents);	582	fd_event (EV_A_ fd, revents);
449	}	583	}
450		584
451	void inline_size	585	void inline_size
452	fd_reify (EV_P)	586	fd_reify (EV_P)
453	{	587	{
…		…
457	{	591	{
458	int fd = fdchanges [i];	592	int fd = fdchanges [i];
459	ANFD *anfd = anfds + fd;	593	ANFD *anfd = anfds + fd;
460	ev_io *w;	594	ev_io *w;
461		595
462	int events = 0;	596	unsigned char events = 0;
463		597
464	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)	598	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
465	events \|= w->events;	599	events \|= (unsigned char)w->events;
466		600
467	#if EV_SELECT_IS_WINSOCKET	601	#if EV_SELECT_IS_WINSOCKET
468	if (events)	602	if (events)
469	{	603	{
470	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
471	anfd->handle = _get_osfhandle (fd);	608	anfd->handle = _get_osfhandle (fd);
		609	#endif
472	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));
473	}	611	}
474	#endif	612	#endif
475		613
		614	{
		615	unsigned char o_events = anfd->events;
		616	unsigned char o_reify = anfd->reify;
		617
476	anfd->reify = 0;	618	anfd->reify = 0;
477
478	backend_modify (EV_A_ fd, anfd->events, events);
479	anfd->events = events;	619	anfd->events = events;
		620
		621	if (o_events != events \|\| o_reify & EV_IOFDSET)
		622	backend_modify (EV_A_ fd, o_events, events);
		623	}
480	}	624	}
481		625
482	fdchangecnt = 0;	626	fdchangecnt = 0;
483	}	627	}
484		628
485	void inline_size	629	void inline_size
486	fd_change (EV_P_ int fd)	630	fd_change (EV_P_ int fd, int flags)
487	{	631	{
488	if (expect_false (anfds [fd].reify))	632	unsigned char reify = anfds [fd].reify;
489	return;
490
491	anfds [fd].reify = 1;	633	anfds [fd].reify \|= flags;
492		634
		635	if (expect_true (!reify))
		636	{
493	++fdchangecnt;	637	++fdchangecnt;
494	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	638	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
495	fdchanges [fdchangecnt - 1] = fd;	639	fdchanges [fdchangecnt - 1] = fd;
		640	}
496	}	641	}
497		642
498	void inline_speed	643	void inline_speed
499	fd_kill (EV_P_ int fd)	644	fd_kill (EV_P_ int fd)
500	{	645	{
…		…
547	static void noinline	692	static void noinline
548	fd_rearm_all (EV_P)	693	fd_rearm_all (EV_P)
549	{	694	{
550	int fd;	695	int fd;
551		696
552	/* this should be highly optimised to not do anything but set a flag */
553	for (fd = 0; fd < anfdmax; ++fd)	697	for (fd = 0; fd < anfdmax; ++fd)
554	if (anfds [fd].events)	698	if (anfds [fd].events)
555	{	699	{
556	anfds [fd].events = 0;	700	anfds [fd].events = 0;
557	fd_change (EV_A_ fd);	701	fd_change (EV_A_ fd, EV_IOFDSET \| 1);
558	}	702	}
559	}	703	}
560		704
561	/*****************************************************************************/	705	/*****************************************************************************/
562		706
563	void inline_speed	707	void inline_speed
564	upheap (WT *heap, int k)	708	upheap (WT *heap, int k)
565	{	709	{
566	WT w = heap [k];	710	WT w = heap [k];
567		711
568	while (k && heap [k >> 1]->at > w->at)	712	while (k)
569	{	713	{
		714	int p = (k - 1) >> 1;
		715
		716	if (heap [p]->at <= w->at)
		717	break;
		718
570	heap [k] = heap [k >> 1];	719	heap [k] = heap [p];
571	((W)heap [k])->active = k + 1;	720	((W)heap [k])->active = k + 1;
572	k >>= 1;	721	k = p;
573	}	722	}
574		723
575	heap [k] = w;	724	heap [k] = w;
576	((W)heap [k])->active = k + 1;	725	((W)heap [k])->active = k + 1;
577
578	}	726	}
579		727
580	void inline_speed	728	void inline_speed
581	downheap (WT *heap, int N, int k)	729	downheap (WT *heap, int N, int k)
582	{	730	{
583	WT w = heap [k];	731	WT w = heap [k];
584		732
585	while (k < (N >> 1))	733	for (;;)
586	{	734	{
587	int j = k << 1;	735	int c = (k << 1) + 1;
588		736
589	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	737	if (c >= N)
590	++j;
591
592	if (w->at <= heap [j]->at)
593	break;	738	break;
594		739
		740	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		741	? 1 : 0;
		742
		743	if (w->at <= heap [c]->at)
		744	break;
		745
595	heap [k] = heap [j];	746	heap [k] = heap [c];
596	((W)heap [k])->active = k + 1;	747	((W)heap [k])->active = k + 1;
		748
597	k = j;	749	k = c;
598	}	750	}
599		751
600	heap [k] = w;	752	heap [k] = w;
601	((W)heap [k])->active = k + 1;	753	((W)heap [k])->active = k + 1;
602	}	754	}
…		…
684	for (signum = signalmax; signum--; )	836	for (signum = signalmax; signum--; )
685	if (signals [signum].gotsig)	837	if (signals [signum].gotsig)
686	ev_feed_signal_event (EV_A_ signum + 1);	838	ev_feed_signal_event (EV_A_ signum + 1);
687	}	839	}
688		840
689	void inline_size	841	void inline_speed
690	fd_intern (int fd)	842	fd_intern (int fd)
691	{	843	{
692	#ifdef _WIN32	844	#ifdef _WIN32
693	int arg = 1;	845	int arg = 1;
694	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	846	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
709	ev_unref (EV_A); /* child watcher should not keep loop alive */	861	ev_unref (EV_A); /* child watcher should not keep loop alive */
710	}	862	}
711		863
712	/*****************************************************************************/	864	/*****************************************************************************/
713		865
714	static ev_child *childs [PID_HASHSIZE];	866	static WL childs [EV_PID_HASHSIZE];
715		867
716	#ifndef _WIN32	868	#ifndef _WIN32
717		869
718	static ev_signal childev;	870	static ev_signal childev;
		871
		872	#ifndef WIFCONTINUED
		873	# define WIFCONTINUED(status) 0
		874	#endif
719		875
720	void inline_speed	876	void inline_speed
721	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)	877	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
722	{	878	{
723	ev_child *w;	879	ev_child *w;
		880	int traced = WIFSTOPPED (status) \|\| WIFCONTINUED (status);
724		881
725	for (w = (ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)	882	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)
		883	{
726	if (w->pid == pid \|\| !w->pid)	884	if ((w->pid == pid \|\| !w->pid)
		885	&& (!traced \|\| (w->flags & 1)))
727	{	886	{
728	ev_priority (w) = ev_priority (sw); /* need to do it now */	887	ev_set_priority (w, ev_priority (sw)); /* need to do it now */
729	w->rpid = pid;	888	w->rpid = pid;
730	w->rstatus = status;	889	w->rstatus = status;
731	ev_feed_event (EV_A_ (W)w, EV_CHILD);	890	ev_feed_event (EV_A_ (W)w, EV_CHILD);
732	}	891	}
		892	}
733	}	893	}
734		894
735	#ifndef WCONTINUED	895	#ifndef WCONTINUED
736	# define WCONTINUED 0	896	# define WCONTINUED 0
737	#endif	897	#endif
…		…
751	/* make sure we are called again until all childs have been reaped */	911	/* make sure we are called again until all childs have been reaped */
752	/* we need to do it this way so that the callback gets called before we continue */	912	/* we need to do it this way so that the callback gets called before we continue */
753	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	913	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
754		914
755	child_reap (EV_A_ sw, pid, pid, status);	915	child_reap (EV_A_ sw, pid, pid, status);
		916	if (EV_PID_HASHSIZE > 1)
756	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */	917	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
757	}	918	}
758		919
759	#endif	920	#endif
760		921
761	/*****************************************************************************/	922	/*****************************************************************************/
…		…
833	}	994	}
834		995
835	unsigned int	996	unsigned int
836	ev_embeddable_backends (void)	997	ev_embeddable_backends (void)
837	{	998	{
838	return EVBACKEND_EPOLL	999	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
839	\| EVBACKEND_KQUEUE	1000
840	\| EVBACKEND_PORT;	1001	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1002	/* please fix it and tell me how to detect the fix */
		1003	flags &= ~EVBACKEND_EPOLL;
		1004
		1005	return flags;
841	}	1006	}
842		1007
843	unsigned int	1008	unsigned int
844	ev_backend (EV_P)	1009	ev_backend (EV_P)
845	{	1010	{
846	return backend;	1011	return backend;
847	}	1012	}
848		1013
849	static void	1014	unsigned int
		1015	ev_loop_count (EV_P)
		1016	{
		1017	return loop_count;
		1018	}
		1019
		1020	void
		1021	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1022	{
		1023	io_blocktime = interval;
		1024	}
		1025
		1026	void
		1027	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1028	{
		1029	timeout_blocktime = interval;
		1030	}
		1031
		1032	static void noinline
850	loop_init (EV_P_ unsigned int flags)	1033	loop_init (EV_P_ unsigned int flags)
851	{	1034	{
852	if (!backend)	1035	if (!backend)
853	{	1036	{
854	#if EV_USE_MONOTONIC	1037	#if EV_USE_MONOTONIC
…		…
862	ev_rt_now = ev_time ();	1045	ev_rt_now = ev_time ();
863	mn_now = get_clock ();	1046	mn_now = get_clock ();
864	now_floor = mn_now;	1047	now_floor = mn_now;
865	rtmn_diff = ev_rt_now - mn_now;	1048	rtmn_diff = ev_rt_now - mn_now;
866		1049
		1050	io_blocktime = 0.;
		1051	timeout_blocktime = 0.;
		1052
		1053	/* pid check not overridable via env */
		1054	#ifndef _WIN32
		1055	if (flags & EVFLAG_FORKCHECK)
		1056	curpid = getpid ();
		1057	#endif
		1058
867	if (!(flags & EVFLAG_NOENV)	1059	if (!(flags & EVFLAG_NOENV)
868	&& !enable_secure ()	1060	&& !enable_secure ()
869	&& getenv ("LIBEV_FLAGS"))	1061	&& getenv ("LIBEV_FLAGS"))
870	flags = atoi (getenv ("LIBEV_FLAGS"));	1062	flags = atoi (getenv ("LIBEV_FLAGS"));
871		1063
872	if (!(flags & 0x0000ffffUL))	1064	if (!(flags & 0x0000ffffUL))
873	flags \|= ev_recommended_backends ();	1065	flags \|= ev_recommended_backends ();
874		1066
875	backend = 0;	1067	backend = 0;
		1068	backend_fd = -1;
		1069	#if EV_USE_INOTIFY
		1070	fs_fd = -2;
		1071	#endif
		1072
876	#if EV_USE_PORT	1073	#if EV_USE_PORT
877	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1074	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
878	#endif	1075	#endif
879	#if EV_USE_KQUEUE	1076	#if EV_USE_KQUEUE
880	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);	1077	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
…		…
892	ev_init (&sigev, sigcb);	1089	ev_init (&sigev, sigcb);
893	ev_set_priority (&sigev, EV_MAXPRI);	1090	ev_set_priority (&sigev, EV_MAXPRI);
894	}	1091	}
895	}	1092	}
896		1093
897	static void	1094	static void noinline
898	loop_destroy (EV_P)	1095	loop_destroy (EV_P)
899	{	1096	{
900	int i;	1097	int i;
		1098
		1099	#if EV_USE_INOTIFY
		1100	if (fs_fd >= 0)
		1101	close (fs_fd);
		1102	#endif
		1103
		1104	if (backend_fd >= 0)
		1105	close (backend_fd);
901		1106
902	#if EV_USE_PORT	1107	#if EV_USE_PORT
903	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);	1108	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
904	#endif	1109	#endif
905	#if EV_USE_KQUEUE	1110	#if EV_USE_KQUEUE
…		…
914	#if EV_USE_SELECT	1119	#if EV_USE_SELECT
915	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);	1120	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
916	#endif	1121	#endif
917		1122
918	for (i = NUMPRI; i--; )	1123	for (i = NUMPRI; i--; )
		1124	{
919	array_free (pending, [i]);	1125	array_free (pending, [i]);
		1126	#if EV_IDLE_ENABLE
		1127	array_free (idle, [i]);
		1128	#endif
		1129	}
		1130
		1131	ev_free (anfds); anfdmax = 0;
920		1132
921	/* have to use the microsoft-never-gets-it-right macro */	1133	/* have to use the microsoft-never-gets-it-right macro */
922	array_free (fdchange, EMPTY0);	1134	array_free (fdchange, EMPTY);
923	array_free (timer, EMPTY0);	1135	array_free (timer, EMPTY);
924	#if EV_PERIODIC_ENABLE	1136	#if EV_PERIODIC_ENABLE
925	array_free (periodic, EMPTY0);	1137	array_free (periodic, EMPTY);
926	#endif	1138	#endif
		1139	#if EV_FORK_ENABLE
927	array_free (idle, EMPTY0);	1140	array_free (fork, EMPTY);
		1141	#endif
928	array_free (prepare, EMPTY0);	1142	array_free (prepare, EMPTY);
929	array_free (check, EMPTY0);	1143	array_free (check, EMPTY);
930		1144
931	backend = 0;	1145	backend = 0;
932	}	1146	}
933		1147
934	static void	1148	void inline_size infy_fork (EV_P);
		1149
		1150	void inline_size
935	loop_fork (EV_P)	1151	loop_fork (EV_P)
936	{	1152	{
937	#if EV_USE_PORT	1153	#if EV_USE_PORT
938	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1154	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
939	#endif	1155	#endif
940	#if EV_USE_KQUEUE	1156	#if EV_USE_KQUEUE
941	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);	1157	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
942	#endif	1158	#endif
943	#if EV_USE_EPOLL	1159	#if EV_USE_EPOLL
944	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);	1160	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1161	#endif
		1162	#if EV_USE_INOTIFY
		1163	infy_fork (EV_A);
945	#endif	1164	#endif
946		1165
947	if (ev_is_active (&sigev))	1166	if (ev_is_active (&sigev))
948	{	1167	{
949	/* default loop */	1168	/* default loop */
…		…
955		1174
956	while (pipe (sigpipe))	1175	while (pipe (sigpipe))
957	syserr ("(libev) error creating pipe");	1176	syserr ("(libev) error creating pipe");
958		1177
959	siginit (EV_A);	1178	siginit (EV_A);
		1179	sigcb (EV_A_ &sigev, EV_READ);
960	}	1180	}
961		1181
962	postfork = 0;	1182	postfork = 0;
963	}	1183	}
964		1184
…		…
986	}	1206	}
987		1207
988	void	1208	void
989	ev_loop_fork (EV_P)	1209	ev_loop_fork (EV_P)
990	{	1210	{
991	postfork = 1;	1211	postfork = 1; /* must be in line with ev_default_fork */
992	}	1212	}
993		1213
994	#endif	1214	#endif
995		1215
996	#if EV_MULTIPLICITY	1216	#if EV_MULTIPLICITY
…		…
1060	#if EV_MULTIPLICITY	1280	#if EV_MULTIPLICITY
1061	struct ev_loop *loop = ev_default_loop_ptr;	1281	struct ev_loop *loop = ev_default_loop_ptr;
1062	#endif	1282	#endif
1063		1283
1064	if (backend)	1284	if (backend)
1065	postfork = 1;	1285	postfork = 1; /* must be in line with ev_loop_fork */
1066	}	1286	}
1067		1287
1068	/*****************************************************************************/	1288	/*****************************************************************************/
1069		1289
1070	int inline_size	1290	void
1071	any_pending (EV_P)	1291	ev_invoke (EV_P_ void *w, int revents)
1072	{	1292	{
1073	int pri;	1293	EV_CB_INVOKE ((W)w, revents);
1074
1075	for (pri = NUMPRI; pri--; )
1076	if (pendingcnt [pri])
1077	return 1;
1078
1079	return 0;
1080	}	1294	}
1081		1295
1082	void inline_speed	1296	void inline_speed
1083	call_pending (EV_P)	1297	call_pending (EV_P)
1084	{	1298	{
…		…
1089	{	1303	{
1090	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1304	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1091		1305
1092	if (expect_true (p->w))	1306	if (expect_true (p->w))
1093	{	1307	{
1094	assert (("non-pending watcher on pending list", p->w->pending));	1308	/assert (("non-pending watcher on pending list", p->w->pending));/
1095		1309
1096	p->w->pending = 0;	1310	p->w->pending = 0;
1097	EV_CB_INVOKE (p->w, p->events);	1311	EV_CB_INVOKE (p->w, p->events);
1098	}	1312	}
1099	}	1313	}
…		…
1102	void inline_size	1316	void inline_size
1103	timers_reify (EV_P)	1317	timers_reify (EV_P)
1104	{	1318	{
1105	while (timercnt && ((WT)timers [0])->at <= mn_now)	1319	while (timercnt && ((WT)timers [0])->at <= mn_now)
1106	{	1320	{
1107	ev_timer *w = timers [0];	1321	ev_timer w = (ev_timer )timers [0];
1108		1322
1109	assert (("inactive timer on timer heap detected", ev_is_active (w)));	1323	/assert (("inactive timer on timer heap detected", ev_is_active (w)));/
1110		1324
1111	/* first reschedule or stop timer */	1325	/* first reschedule or stop timer */
1112	if (w->repeat)	1326	if (w->repeat)
1113	{	1327	{
1114	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1328	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1115		1329
1116	((WT)w)->at += w->repeat;	1330	((WT)w)->at += w->repeat;
1117	if (((WT)w)->at < mn_now)	1331	if (((WT)w)->at < mn_now)
1118	((WT)w)->at = mn_now;	1332	((WT)w)->at = mn_now;
1119		1333
1120	downheap ((WT *)timers, timercnt, 0);	1334	downheap (timers, timercnt, 0);
1121	}	1335	}
1122	else	1336	else
1123	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1337	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1124		1338
1125	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1339	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
…		…
1130	void inline_size	1344	void inline_size
1131	periodics_reify (EV_P)	1345	periodics_reify (EV_P)
1132	{	1346	{
1133	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)	1347	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1134	{	1348	{
1135	ev_periodic *w = periodics [0];	1349	ev_periodic w = (ev_periodic )periodics [0];
1136		1350
1137	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	1351	/assert (("inactive timer on periodic heap detected", ev_is_active (w)));/
1138		1352
1139	/* first reschedule or stop timer */	1353	/* first reschedule or stop timer */
1140	if (w->reschedule_cb)	1354	if (w->reschedule_cb)
1141	{	1355	{
1142	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);	1356	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1143	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));	1357	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1144	downheap ((WT *)periodics, periodiccnt, 0);	1358	downheap (periodics, periodiccnt, 0);
1145	}	1359	}
1146	else if (w->interval)	1360	else if (w->interval)
1147	{	1361	{
1148	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;	1362	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1363	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1149	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));	1364	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1150	downheap ((WT *)periodics, periodiccnt, 0);	1365	downheap (periodics, periodiccnt, 0);
1151	}	1366	}
1152	else	1367	else
1153	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1368	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1154		1369
1155	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1370	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
…		…
1162	int i;	1377	int i;
1163		1378
1164	/* adjust periodics after time jump */	1379	/* adjust periodics after time jump */
1165	for (i = 0; i < periodiccnt; ++i)	1380	for (i = 0; i < periodiccnt; ++i)
1166	{	1381	{
1167	ev_periodic *w = periodics [i];	1382	ev_periodic w = (ev_periodic )periodics [i];
1168		1383
1169	if (w->reschedule_cb)	1384	if (w->reschedule_cb)
1170	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	1385	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1171	else if (w->interval)	1386	else if (w->interval)
1172	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	1387	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1173	}	1388	}
1174		1389
1175	/* now rebuild the heap */	1390	/* now rebuild the heap */
1176	for (i = periodiccnt >> 1; i--; )	1391	for (i = periodiccnt >> 1; i--; )
1177	downheap ((WT *)periodics, periodiccnt, i);	1392	downheap (periodics, periodiccnt, i);
1178	}	1393	}
1179	#endif	1394	#endif
1180		1395
		1396	#if EV_IDLE_ENABLE
1181	int inline_size	1397	void inline_size
1182	time_update_monotonic (EV_P)	1398	idle_reify (EV_P)
1183	{	1399	{
		1400	if (expect_false (idleall))
		1401	{
		1402	int pri;
		1403
		1404	for (pri = NUMPRI; pri--; )
		1405	{
		1406	if (pendingcnt [pri])
		1407	break;
		1408
		1409	if (idlecnt [pri])
		1410	{
		1411	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1412	break;
		1413	}
		1414	}
		1415	}
		1416	}
		1417	#endif
		1418
		1419	void inline_speed
		1420	time_update (EV_P_ ev_tstamp max_block)
		1421	{
		1422	int i;
		1423
		1424	#if EV_USE_MONOTONIC
		1425	if (expect_true (have_monotonic))
		1426	{
		1427	ev_tstamp odiff = rtmn_diff;
		1428
1184	mn_now = get_clock ();	1429	mn_now = get_clock ();
1185		1430
		1431	/* only fetch the realtime clock every 0.5MIN_TIMEJUMP seconds /
		1432	/* interpolate in the meantime */
1186	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1433	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1187	{	1434	{
1188	ev_rt_now = rtmn_diff + mn_now;	1435	ev_rt_now = rtmn_diff + mn_now;
1189	return 0;	1436	return;
1190	}	1437	}
1191	else	1438
1192	{
1193	now_floor = mn_now;	1439	now_floor = mn_now;
1194	ev_rt_now = ev_time ();	1440	ev_rt_now = ev_time ();
1195	return 1;
1196	}
1197	}
1198		1441
1199	void inline_size	1442	/* loop a few times, before making important decisions.
1200	time_update (EV_P)	1443	* on the choice of "4": one iteration isn't enough,
1201	{	1444	* in case we get preempted during the calls to
1202	int i;	1445	* ev_time and get_clock. a second call is almost guaranteed
1203		1446	* to succeed in that case, though. and looping a few more times
1204	#if EV_USE_MONOTONIC	1447	* doesn't hurt either as we only do this on time-jumps or
1205	if (expect_true (have_monotonic))	1448	* in the unlikely event of having been preempted here.
1206	{	1449	*/
1207	if (time_update_monotonic (EV_A))	1450	for (i = 4; --i; )
1208	{	1451	{
1209	ev_tstamp odiff = rtmn_diff;
1210
1211	/* loop a few times, before making important decisions.
1212	* on the choice of "4": one iteration isn't enough,
1213	* in case we get preempted during the calls to
1214	* ev_time and get_clock. a second call is almost guarenteed
1215	* to succeed in that case, though. and looping a few more times
1216	* doesn't hurt either as we only do this on time-jumps or
1217	* in the unlikely event of getting preempted here.
1218	*/
1219	for (i = 4; --i; )
1220	{
1221	rtmn_diff = ev_rt_now - mn_now;	1452	rtmn_diff = ev_rt_now - mn_now;
1222		1453
1223	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1454	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
1224	return; /* all is well */	1455	return; /* all is well */
1225		1456
1226	ev_rt_now = ev_time ();	1457	ev_rt_now = ev_time ();
1227	mn_now = get_clock ();	1458	mn_now = get_clock ();
1228	now_floor = mn_now;	1459	now_floor = mn_now;
1229	}	1460	}
1230		1461
1231	# if EV_PERIODIC_ENABLE	1462	# if EV_PERIODIC_ENABLE
1232	periodics_reschedule (EV_A);	1463	periodics_reschedule (EV_A);
1233	# endif	1464	# endif
1234	/* no timer adjustment, as the monotonic clock doesn't jump */	1465	/* no timer adjustment, as the monotonic clock doesn't jump */
1235	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */	1466	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1236	}
1237	}	1467	}
1238	else	1468	else
1239	#endif	1469	#endif
1240	{	1470	{
1241	ev_rt_now = ev_time ();	1471	ev_rt_now = ev_time ();
1242		1472
1243	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1473	if (expect_false (mn_now > ev_rt_now \|\| ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1244	{	1474	{
1245	#if EV_PERIODIC_ENABLE	1475	#if EV_PERIODIC_ENABLE
1246	periodics_reschedule (EV_A);	1476	periodics_reschedule (EV_A);
1247	#endif	1477	#endif
1248
1249	/* adjust timers. this is easy, as the offset is the same for all */	1478	/* adjust timers. this is easy, as the offset is the same for all of them */
1250	for (i = 0; i < timercnt; ++i)	1479	for (i = 0; i < timercnt; ++i)
1251	((WT)timers [i])->at += ev_rt_now - mn_now;	1480	((WT)timers [i])->at += ev_rt_now - mn_now;
1252	}	1481	}
1253		1482
1254	mn_now = ev_rt_now;	1483	mn_now = ev_rt_now;
…		…
1274	{	1503	{
1275	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)	1504	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)
1276	? EVUNLOOP_ONE	1505	? EVUNLOOP_ONE
1277	: EVUNLOOP_CANCEL;	1506	: EVUNLOOP_CANCEL;
1278		1507
1279	while (activecnt)	1508	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
		1509
		1510	do
1280	{	1511	{
1281	/* we might have forked, so reify kernel state if necessary */	1512	#ifndef _WIN32
		1513	if (expect_false (curpid)) /* penalise the forking check even more */
		1514	if (expect_false (getpid () != curpid))
		1515	{
		1516	curpid = getpid ();
		1517	postfork = 1;
		1518	}
		1519	#endif
		1520
1282	#if EV_FORK_ENABLE	1521	#if EV_FORK_ENABLE
		1522	/* we might have forked, so queue fork handlers */
1283	if (expect_false (postfork))	1523	if (expect_false (postfork))
1284	if (forkcnt)	1524	if (forkcnt)
1285	{	1525	{
1286	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	1526	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1287	call_pending (EV_A);	1527	call_pending (EV_A);
1288	}	1528	}
1289	#endif	1529	#endif
1290		1530
1291	/* queue check watchers (and execute them) */	1531	/* queue prepare watchers (and execute them) */
1292	if (expect_false (preparecnt))	1532	if (expect_false (preparecnt))
1293	{	1533	{
1294	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1534	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1295	call_pending (EV_A);	1535	call_pending (EV_A);
1296	}	1536	}
1297		1537
		1538	if (expect_false (!activecnt))
		1539	break;
		1540
1298	/* we might have forked, so reify kernel state if necessary */	1541	/* we might have forked, so reify kernel state if necessary */
1299	if (expect_false (postfork))	1542	if (expect_false (postfork))
1300	loop_fork (EV_A);	1543	loop_fork (EV_A);
1301		1544
1302	/* update fd-related kernel structures */	1545	/* update fd-related kernel structures */
1303	fd_reify (EV_A);	1546	fd_reify (EV_A);
1304		1547
1305	/* calculate blocking time */	1548	/* calculate blocking time */
1306	{	1549	{
1307	double block;	1550	ev_tstamp waittime = 0.;
		1551	ev_tstamp sleeptime = 0.;
1308		1552
1309	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1553	if (expect_true (!(flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt)))
1310	block = 0.; /* do not block at all */
1311	else
1312	{	1554	{
1313	/* update time to cancel out callback processing overhead */	1555	/* update time to cancel out callback processing overhead */
1314	#if EV_USE_MONOTONIC
1315	if (expect_true (have_monotonic))
1316	time_update_monotonic (EV_A);	1556	time_update (EV_A_ 1e100);
1317	else
1318	#endif
1319	{
1320	ev_rt_now = ev_time ();
1321	mn_now = ev_rt_now;
1322	}
1323		1557
1324	block = MAX_BLOCKTIME;	1558	waittime = MAX_BLOCKTIME;
1325		1559
1326	if (timercnt)	1560	if (timercnt)
1327	{	1561	{
1328	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;	1562	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
1329	if (block > to) block = to;	1563	if (waittime > to) waittime = to;
1330	}	1564	}
1331		1565
1332	#if EV_PERIODIC_ENABLE	1566	#if EV_PERIODIC_ENABLE
1333	if (periodiccnt)	1567	if (periodiccnt)
1334	{	1568	{
1335	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;	1569	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
1336	if (block > to) block = to;	1570	if (waittime > to) waittime = to;
1337	}	1571	}
1338	#endif	1572	#endif
1339		1573
1340	if (expect_false (block < 0.)) block = 0.;	1574	if (expect_false (waittime < timeout_blocktime))
		1575	waittime = timeout_blocktime;
		1576
		1577	sleeptime = waittime - backend_fudge;
		1578
		1579	if (expect_true (sleeptime > io_blocktime))
		1580	sleeptime = io_blocktime;
		1581
		1582	if (sleeptime)
		1583	{
		1584	ev_sleep (sleeptime);
		1585	waittime -= sleeptime;
		1586	}
1341	}	1587	}
1342		1588
		1589	++loop_count;
1343	backend_poll (EV_A_ block);	1590	backend_poll (EV_A_ waittime);
		1591
		1592	/* update ev_rt_now, do magic */
		1593	time_update (EV_A_ waittime + sleeptime);
1344	}	1594	}
1345
1346	/* update ev_rt_now, do magic */
1347	time_update (EV_A);
1348		1595
1349	/* queue pending timers and reschedule them */	1596	/* queue pending timers and reschedule them */
1350	timers_reify (EV_A); /* relative timers called last */	1597	timers_reify (EV_A); /* relative timers called last */
1351	#if EV_PERIODIC_ENABLE	1598	#if EV_PERIODIC_ENABLE
1352	periodics_reify (EV_A); /* absolute timers called first */	1599	periodics_reify (EV_A); /* absolute timers called first */
1353	#endif	1600	#endif
1354		1601
		1602	#if EV_IDLE_ENABLE
1355	/* queue idle watchers unless other events are pending */	1603	/* queue idle watchers unless other events are pending */
1356	if (idlecnt && !any_pending (EV_A))	1604	idle_reify (EV_A);
1357	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	1605	#endif
1358		1606
1359	/* queue check watchers, to be executed first */	1607	/* queue check watchers, to be executed first */
1360	if (expect_false (checkcnt))	1608	if (expect_false (checkcnt))
1361	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1609	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1362		1610
1363	call_pending (EV_A);	1611	call_pending (EV_A);
1364		1612
1365	if (expect_false (loop_done))
1366	break;
1367	}	1613	}
		1614	while (expect_true (activecnt && !loop_done));
1368		1615
1369	if (loop_done == EVUNLOOP_ONE)	1616	if (loop_done == EVUNLOOP_ONE)
1370	loop_done = EVUNLOOP_CANCEL;	1617	loop_done = EVUNLOOP_CANCEL;
1371	}	1618	}
1372		1619
…		…
1399	head = &(*head)->next;	1646	head = &(*head)->next;
1400	}	1647	}
1401	}	1648	}
1402		1649
1403	void inline_speed	1650	void inline_speed
1404	ev_clear_pending (EV_P_ W w)	1651	clear_pending (EV_P_ W w)
1405	{	1652	{
1406	if (w->pending)	1653	if (w->pending)
1407	{	1654	{
1408	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1655	pendings [ABSPRI (w)][w->pending - 1].w = 0;
1409	w->pending = 0;	1656	w->pending = 0;
1410	}	1657	}
1411	}	1658	}
1412		1659
		1660	int
		1661	ev_clear_pending (EV_P_ void *w)
		1662	{
		1663	W w_ = (W)w;
		1664	int pending = w_->pending;
		1665
		1666	if (expect_true (pending))
		1667	{
		1668	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1669	w_->pending = 0;
		1670	p->w = 0;
		1671	return p->events;
		1672	}
		1673	else
		1674	return 0;
		1675	}
		1676
		1677	void inline_size
		1678	pri_adjust (EV_P_ W w)
		1679	{
		1680	int pri = w->priority;
		1681	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1682	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1683	w->priority = pri;
		1684	}
		1685
1413	void inline_speed	1686	void inline_speed
1414	ev_start (EV_P_ W w, int active)	1687	ev_start (EV_P_ W w, int active)
1415	{	1688	{
1416	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1689	pri_adjust (EV_A_ w);
1417	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1418
1419	w->active = active;	1690	w->active = active;
1420	ev_ref (EV_A);	1691	ev_ref (EV_A);
1421	}	1692	}
1422		1693
1423	void inline_size	1694	void inline_size
…		…
1427	w->active = 0;	1698	w->active = 0;
1428	}	1699	}
1429		1700
1430	/*****************************************************************************/	1701	/*****************************************************************************/
1431		1702
1432	void	1703	void noinline
1433	ev_io_start (EV_P_ ev_io *w)	1704	ev_io_start (EV_P_ ev_io *w)
1434	{	1705	{
1435	int fd = w->fd;	1706	int fd = w->fd;
1436		1707
1437	if (expect_false (ev_is_active (w)))	1708	if (expect_false (ev_is_active (w)))
…		…
1439		1710
1440	assert (("ev_io_start called with negative fd", fd >= 0));	1711	assert (("ev_io_start called with negative fd", fd >= 0));
1441		1712
1442	ev_start (EV_A_ (W)w, 1);	1713	ev_start (EV_A_ (W)w, 1);
1443	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	1714	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1444	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1715	wlist_add (&anfds[fd].head, (WL)w);
1445		1716
1446	fd_change (EV_A_ fd);	1717	fd_change (EV_A_ fd, w->events & EV_IOFDSET \| 1);
		1718	w->events &= ~EV_IOFDSET;
1447	}	1719	}
1448		1720
1449	void	1721	void noinline
1450	ev_io_stop (EV_P_ ev_io *w)	1722	ev_io_stop (EV_P_ ev_io *w)
1451	{	1723	{
1452	ev_clear_pending (EV_A_ (W)w);	1724	clear_pending (EV_A_ (W)w);
1453	if (expect_false (!ev_is_active (w)))	1725	if (expect_false (!ev_is_active (w)))
1454	return;	1726	return;
1455		1727
1456	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	1728	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1457		1729
1458	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1730	wlist_del (&anfds[w->fd].head, (WL)w);
1459	ev_stop (EV_A_ (W)w);	1731	ev_stop (EV_A_ (W)w);
1460		1732
1461	fd_change (EV_A_ w->fd);	1733	fd_change (EV_A_ w->fd, 1);
1462	}	1734	}
1463		1735
1464	void	1736	void noinline
1465	ev_timer_start (EV_P_ ev_timer *w)	1737	ev_timer_start (EV_P_ ev_timer *w)
1466	{	1738	{
1467	if (expect_false (ev_is_active (w)))	1739	if (expect_false (ev_is_active (w)))
1468	return;	1740	return;
1469		1741
1470	((WT)w)->at += mn_now;	1742	((WT)w)->at += mn_now;
1471		1743
1472	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1744	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1473		1745
1474	ev_start (EV_A_ (W)w, ++timercnt);	1746	ev_start (EV_A_ (W)w, ++timercnt);
1475	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);	1747	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
1476	timers [timercnt - 1] = w;	1748	timers [timercnt - 1] = (WT)w;
1477	upheap ((WT *)timers, timercnt - 1);	1749	upheap (timers, timercnt - 1);
1478		1750
1479	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	1751	/assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));/
1480	}	1752	}
1481		1753
1482	void	1754	void noinline
1483	ev_timer_stop (EV_P_ ev_timer *w)	1755	ev_timer_stop (EV_P_ ev_timer *w)
1484	{	1756	{
1485	ev_clear_pending (EV_A_ (W)w);	1757	clear_pending (EV_A_ (W)w);
1486	if (expect_false (!ev_is_active (w)))	1758	if (expect_false (!ev_is_active (w)))
1487	return;	1759	return;
1488		1760
1489	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	1761	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
1490		1762
		1763	{
		1764	int active = ((W)w)->active;
		1765
1491	if (expect_true (((W)w)->active < timercnt--))	1766	if (expect_true (--active < --timercnt))
1492	{	1767	{
1493	timers [((W)w)->active - 1] = timers [timercnt];	1768	timers [active] = timers [timercnt];
1494	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	1769	adjustheap (timers, timercnt, active);
1495	}	1770	}
		1771	}
1496		1772
1497	((WT)w)->at -= mn_now;	1773	((WT)w)->at -= mn_now;
1498		1774
1499	ev_stop (EV_A_ (W)w);	1775	ev_stop (EV_A_ (W)w);
1500	}	1776	}
1501		1777
1502	void	1778	void noinline
1503	ev_timer_again (EV_P_ ev_timer *w)	1779	ev_timer_again (EV_P_ ev_timer *w)
1504	{	1780	{
1505	if (ev_is_active (w))	1781	if (ev_is_active (w))
1506	{	1782	{
1507	if (w->repeat)	1783	if (w->repeat)
1508	{	1784	{
1509	((WT)w)->at = mn_now + w->repeat;	1785	((WT)w)->at = mn_now + w->repeat;
1510	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	1786	adjustheap (timers, timercnt, ((W)w)->active - 1);
1511	}	1787	}
1512	else	1788	else
1513	ev_timer_stop (EV_A_ w);	1789	ev_timer_stop (EV_A_ w);
1514	}	1790	}
1515	else if (w->repeat)	1791	else if (w->repeat)
…		…
1518	ev_timer_start (EV_A_ w);	1794	ev_timer_start (EV_A_ w);
1519	}	1795	}
1520	}	1796	}
1521		1797
1522	#if EV_PERIODIC_ENABLE	1798	#if EV_PERIODIC_ENABLE
1523	void	1799	void noinline
1524	ev_periodic_start (EV_P_ ev_periodic *w)	1800	ev_periodic_start (EV_P_ ev_periodic *w)
1525	{	1801	{
1526	if (expect_false (ev_is_active (w)))	1802	if (expect_false (ev_is_active (w)))
1527	return;	1803	return;
1528		1804
…		…
1530	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	1806	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1531	else if (w->interval)	1807	else if (w->interval)
1532	{	1808	{
1533	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1809	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1534	/* this formula differs from the one in periodic_reify because we do not always round up */	1810	/* this formula differs from the one in periodic_reify because we do not always round up */
1535	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	1811	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1536	}	1812	}
		1813	else
		1814	((WT)w)->at = w->offset;
1537		1815
1538	ev_start (EV_A_ (W)w, ++periodiccnt);	1816	ev_start (EV_A_ (W)w, ++periodiccnt);
1539	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);	1817	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
1540	periodics [periodiccnt - 1] = w;	1818	periodics [periodiccnt - 1] = (WT)w;
1541	upheap ((WT *)periodics, periodiccnt - 1);	1819	upheap (periodics, periodiccnt - 1);
1542		1820
1543	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	1821	/assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));/
1544	}	1822	}
1545		1823
1546	void	1824	void noinline
1547	ev_periodic_stop (EV_P_ ev_periodic *w)	1825	ev_periodic_stop (EV_P_ ev_periodic *w)
1548	{	1826	{
1549	ev_clear_pending (EV_A_ (W)w);	1827	clear_pending (EV_A_ (W)w);
1550	if (expect_false (!ev_is_active (w)))	1828	if (expect_false (!ev_is_active (w)))
1551	return;	1829	return;
1552		1830
1553	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	1831	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
1554		1832
		1833	{
		1834	int active = ((W)w)->active;
		1835
1555	if (expect_true (((W)w)->active < periodiccnt--))	1836	if (expect_true (--active < --periodiccnt))
1556	{	1837	{
1557	periodics [((W)w)->active - 1] = periodics [periodiccnt];	1838	periodics [active] = periodics [periodiccnt];
1558	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	1839	adjustheap (periodics, periodiccnt, active);
1559	}	1840	}
		1841	}
1560		1842
1561	ev_stop (EV_A_ (W)w);	1843	ev_stop (EV_A_ (W)w);
1562	}	1844	}
1563		1845
1564	void	1846	void noinline
1565	ev_periodic_again (EV_P_ ev_periodic *w)	1847	ev_periodic_again (EV_P_ ev_periodic *w)
1566	{	1848	{
1567	/* TODO: use adjustheap and recalculation */	1849	/* TODO: use adjustheap and recalculation */
1568	ev_periodic_stop (EV_A_ w);	1850	ev_periodic_stop (EV_A_ w);
1569	ev_periodic_start (EV_A_ w);	1851	ev_periodic_start (EV_A_ w);
…		…
1572		1854
1573	#ifndef SA_RESTART	1855	#ifndef SA_RESTART
1574	# define SA_RESTART 0	1856	# define SA_RESTART 0
1575	#endif	1857	#endif
1576		1858
1577	void	1859	void noinline
1578	ev_signal_start (EV_P_ ev_signal *w)	1860	ev_signal_start (EV_P_ ev_signal *w)
1579	{	1861	{
1580	#if EV_MULTIPLICITY	1862	#if EV_MULTIPLICITY
1581	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));	1863	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1582	#endif	1864	#endif
1583	if (expect_false (ev_is_active (w)))	1865	if (expect_false (ev_is_active (w)))
1584	return;	1866	return;
1585		1867
1586	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1868	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1587		1869
		1870	{
		1871	#ifndef _WIN32
		1872	sigset_t full, prev;
		1873	sigfillset (&full);
		1874	sigprocmask (SIG_SETMASK, &full, &prev);
		1875	#endif
		1876
		1877	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1878
		1879	#ifndef _WIN32
		1880	sigprocmask (SIG_SETMASK, &prev, 0);
		1881	#endif
		1882	}
		1883
1588	ev_start (EV_A_ (W)w, 1);	1884	ev_start (EV_A_ (W)w, 1);
1589	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1590	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1885	wlist_add (&signals [w->signum - 1].head, (WL)w);
1591		1886
1592	if (!((WL)w)->next)	1887	if (!((WL)w)->next)
1593	{	1888	{
1594	#if _WIN32	1889	#if _WIN32
1595	signal (w->signum, sighandler);	1890	signal (w->signum, sighandler);
…		…
1601	sigaction (w->signum, &sa, 0);	1896	sigaction (w->signum, &sa, 0);
1602	#endif	1897	#endif
1603	}	1898	}
1604	}	1899	}
1605		1900
1606	void	1901	void noinline
1607	ev_signal_stop (EV_P_ ev_signal *w)	1902	ev_signal_stop (EV_P_ ev_signal *w)
1608	{	1903	{
1609	ev_clear_pending (EV_A_ (W)w);	1904	clear_pending (EV_A_ (W)w);
1610	if (expect_false (!ev_is_active (w)))	1905	if (expect_false (!ev_is_active (w)))
1611	return;	1906	return;
1612		1907
1613	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1908	wlist_del (&signals [w->signum - 1].head, (WL)w);
1614	ev_stop (EV_A_ (W)w);	1909	ev_stop (EV_A_ (W)w);
1615		1910
1616	if (!signals [w->signum - 1].head)	1911	if (!signals [w->signum - 1].head)
1617	signal (w->signum, SIG_DFL);	1912	signal (w->signum, SIG_DFL);
1618	}	1913	}
…		…
1625	#endif	1920	#endif
1626	if (expect_false (ev_is_active (w)))	1921	if (expect_false (ev_is_active (w)))
1627	return;	1922	return;
1628		1923
1629	ev_start (EV_A_ (W)w, 1);	1924	ev_start (EV_A_ (W)w, 1);
1630	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1925	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1631	}	1926	}
1632		1927
1633	void	1928	void
1634	ev_child_stop (EV_P_ ev_child *w)	1929	ev_child_stop (EV_P_ ev_child *w)
1635	{	1930	{
1636	ev_clear_pending (EV_A_ (W)w);	1931	clear_pending (EV_A_ (W)w);
1637	if (expect_false (!ev_is_active (w)))	1932	if (expect_false (!ev_is_active (w)))
1638	return;	1933	return;
1639		1934
1640	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1935	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1641	ev_stop (EV_A_ (W)w);	1936	ev_stop (EV_A_ (W)w);
1642	}	1937	}
1643		1938
1644	#if EV_STAT_ENABLE	1939	#if EV_STAT_ENABLE
1645		1940
…		…
1649	# endif	1944	# endif
1650		1945
1651	#define DEF_STAT_INTERVAL 5.0074891	1946	#define DEF_STAT_INTERVAL 5.0074891
1652	#define MIN_STAT_INTERVAL 0.1074891	1947	#define MIN_STAT_INTERVAL 0.1074891
1653		1948
		1949	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1950
		1951	#if EV_USE_INOTIFY
		1952	# define EV_INOTIFY_BUFSIZE 8192
		1953
		1954	static void noinline
		1955	infy_add (EV_P_ ev_stat *w)
		1956	{
		1957	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB \| IN_DELETE_SELF \| IN_MOVE_SELF \| IN_MODIFY \| IN_DONT_FOLLOW \| IN_MASK_ADD);
		1958
		1959	if (w->wd < 0)
		1960	{
		1961	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1962
		1963	/* monitor some parent directory for speedup hints */
		1964	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)
		1965	{
		1966	char path [4096];
		1967	strcpy (path, w->path);
		1968
		1969	do
		1970	{
		1971	int mask = IN_MASK_ADD \| IN_DELETE_SELF \| IN_MOVE_SELF
		1972	\| (errno == EACCES ? IN_ATTRIB : IN_CREATE \| IN_MOVED_TO);
		1973
		1974	char *pend = strrchr (path, '/');
		1975
		1976	if (!pend)
		1977	break; /* whoops, no '/', complain to your admin */
		1978
		1979	*pend = 0;
		1980	w->wd = inotify_add_watch (fs_fd, path, mask);
		1981	}
		1982	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
		1983	}
		1984	}
		1985	else
		1986	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1987
		1988	if (w->wd >= 0)
		1989	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1990	}
		1991
		1992	static void noinline
		1993	infy_del (EV_P_ ev_stat *w)
		1994	{
		1995	int slot;
		1996	int wd = w->wd;
		1997
		1998	if (wd < 0)
		1999	return;
		2000
		2001	w->wd = -2;
		2002	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2003	wlist_del (&fs_hash [slot].head, (WL)w);
		2004
		2005	/* remove this watcher, if others are watching it, they will rearm */
		2006	inotify_rm_watch (fs_fd, wd);
		2007	}
		2008
		2009	static void noinline
		2010	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2011	{
		2012	if (slot < 0)
		2013	/* overflow, need to check for all hahs slots */
		2014	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2015	infy_wd (EV_A_ slot, wd, ev);
		2016	else
		2017	{
		2018	WL w_;
		2019
		2020	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2021	{
		2022	ev_stat w = (ev_stat )w_;
		2023	w_ = w_->next; /* lets us remove this watcher and all before it */
		2024
		2025	if (w->wd == wd \|\| wd == -1)
		2026	{
		2027	if (ev->mask & (IN_IGNORED \| IN_UNMOUNT \| IN_DELETE_SELF))
		2028	{
		2029	w->wd = -1;
		2030	infy_add (EV_A_ w); /* re-add, no matter what */
		2031	}
		2032
		2033	stat_timer_cb (EV_A_ &w->timer, 0);
		2034	}
		2035	}
		2036	}
		2037	}
		2038
		2039	static void
		2040	infy_cb (EV_P_ ev_io *w, int revents)
		2041	{
		2042	char buf [EV_INOTIFY_BUFSIZE];
		2043	struct inotify_event ev = (struct inotify_event )buf;
		2044	int ofs;
		2045	int len = read (fs_fd, buf, sizeof (buf));
		2046
		2047	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2048	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2049	}
		2050
		2051	void inline_size
		2052	infy_init (EV_P)
		2053	{
		2054	if (fs_fd != -2)
		2055	return;
		2056
		2057	fs_fd = inotify_init ();
		2058
		2059	if (fs_fd >= 0)
		2060	{
		2061	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2062	ev_set_priority (&fs_w, EV_MAXPRI);
		2063	ev_io_start (EV_A_ &fs_w);
		2064	}
		2065	}
		2066
		2067	void inline_size
		2068	infy_fork (EV_P)
		2069	{
		2070	int slot;
		2071
		2072	if (fs_fd < 0)
		2073	return;
		2074
		2075	close (fs_fd);
		2076	fs_fd = inotify_init ();
		2077
		2078	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2079	{
		2080	WL w_ = fs_hash [slot].head;
		2081	fs_hash [slot].head = 0;
		2082
		2083	while (w_)
		2084	{
		2085	ev_stat w = (ev_stat )w_;
		2086	w_ = w_->next; /* lets us add this watcher */
		2087
		2088	w->wd = -1;
		2089
		2090	if (fs_fd >= 0)
		2091	infy_add (EV_A_ w); /* re-add, no matter what */
		2092	else
		2093	ev_timer_start (EV_A_ &w->timer);
		2094	}
		2095
		2096	}
		2097	}
		2098
		2099	#endif
		2100
1654	void	2101	void
1655	ev_stat_stat (EV_P_ ev_stat *w)	2102	ev_stat_stat (EV_P_ ev_stat *w)
1656	{	2103	{
1657	if (lstat (w->path, &w->attr) < 0)	2104	if (lstat (w->path, &w->attr) < 0)
1658	w->attr.st_nlink = 0;	2105	w->attr.st_nlink = 0;
1659	else if (!w->attr.st_nlink)	2106	else if (!w->attr.st_nlink)
1660	w->attr.st_nlink = 1;	2107	w->attr.st_nlink = 1;
1661	}	2108	}
1662		2109
1663	static void	2110	static void noinline
1664	stat_timer_cb (EV_P_ ev_timer *w_, int revents)	2111	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1665	{	2112	{
1666	ev_stat w = (ev_stat )(((char *)w_) - offsetof (ev_stat, timer));	2113	ev_stat w = (ev_stat )(((char *)w_) - offsetof (ev_stat, timer));
1667		2114
1668	/* we copy this here each the time so that */	2115	/* we copy this here each the time so that */
1669	/* prev has the old value when the callback gets invoked */	2116	/* prev has the old value when the callback gets invoked */
1670	w->prev = w->attr;	2117	w->prev = w->attr;
1671	ev_stat_stat (EV_A_ w);	2118	ev_stat_stat (EV_A_ w);
1672		2119
1673	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))	2120	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2121	if (
		2122	w->prev.st_dev != w->attr.st_dev
		2123	\|\| w->prev.st_ino != w->attr.st_ino
		2124	\|\| w->prev.st_mode != w->attr.st_mode
		2125	\|\| w->prev.st_nlink != w->attr.st_nlink
		2126	\|\| w->prev.st_uid != w->attr.st_uid
		2127	\|\| w->prev.st_gid != w->attr.st_gid
		2128	\|\| w->prev.st_rdev != w->attr.st_rdev
		2129	\|\| w->prev.st_size != w->attr.st_size
		2130	\|\| w->prev.st_atime != w->attr.st_atime
		2131	\|\| w->prev.st_mtime != w->attr.st_mtime
		2132	\|\| w->prev.st_ctime != w->attr.st_ctime
		2133	) {
		2134	#if EV_USE_INOTIFY
		2135	infy_del (EV_A_ w);
		2136	infy_add (EV_A_ w);
		2137	ev_stat_stat (EV_A_ w); /* avoid race... */
		2138	#endif
		2139
1674	ev_feed_event (EV_A_ w, EV_STAT);	2140	ev_feed_event (EV_A_ w, EV_STAT);
		2141	}
1675	}	2142	}
1676		2143
1677	void	2144	void
1678	ev_stat_start (EV_P_ ev_stat *w)	2145	ev_stat_start (EV_P_ ev_stat *w)
1679	{	2146	{
…		…
1689	if (w->interval < MIN_STAT_INTERVAL)	2156	if (w->interval < MIN_STAT_INTERVAL)
1690	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;	2157	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
1691		2158
1692	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);	2159	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
1693	ev_set_priority (&w->timer, ev_priority (w));	2160	ev_set_priority (&w->timer, ev_priority (w));
		2161
		2162	#if EV_USE_INOTIFY
		2163	infy_init (EV_A);
		2164
		2165	if (fs_fd >= 0)
		2166	infy_add (EV_A_ w);
		2167	else
		2168	#endif
1694	ev_timer_start (EV_A_ &w->timer);	2169	ev_timer_start (EV_A_ &w->timer);
1695		2170
1696	ev_start (EV_A_ (W)w, 1);	2171	ev_start (EV_A_ (W)w, 1);
1697	}	2172	}
1698		2173
1699	void	2174	void
1700	ev_stat_stop (EV_P_ ev_stat *w)	2175	ev_stat_stop (EV_P_ ev_stat *w)
1701	{	2176	{
1702	ev_clear_pending (EV_A_ (W)w);	2177	clear_pending (EV_A_ (W)w);
1703	if (expect_false (!ev_is_active (w)))	2178	if (expect_false (!ev_is_active (w)))
1704	return;	2179	return;
1705		2180
		2181	#if EV_USE_INOTIFY
		2182	infy_del (EV_A_ w);
		2183	#endif
1706	ev_timer_stop (EV_A_ &w->timer);	2184	ev_timer_stop (EV_A_ &w->timer);
1707		2185
1708	ev_stop (EV_A_ (W)w);	2186	ev_stop (EV_A_ (W)w);
1709	}	2187	}
1710	#endif	2188	#endif
1711		2189
		2190	#if EV_IDLE_ENABLE
1712	void	2191	void
1713	ev_idle_start (EV_P_ ev_idle *w)	2192	ev_idle_start (EV_P_ ev_idle *w)
1714	{	2193	{
1715	if (expect_false (ev_is_active (w)))	2194	if (expect_false (ev_is_active (w)))
1716	return;	2195	return;
1717		2196
		2197	pri_adjust (EV_A_ (W)w);
		2198
		2199	{
		2200	int active = ++idlecnt [ABSPRI (w)];
		2201
		2202	++idleall;
1718	ev_start (EV_A_ (W)w, ++idlecnt);	2203	ev_start (EV_A_ (W)w, active);
		2204
1719	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);	2205	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
1720	idles [idlecnt - 1] = w;	2206	idles [ABSPRI (w)][active - 1] = w;
		2207	}
1721	}	2208	}
1722		2209
1723	void	2210	void
1724	ev_idle_stop (EV_P_ ev_idle *w)	2211	ev_idle_stop (EV_P_ ev_idle *w)
1725	{	2212	{
1726	ev_clear_pending (EV_A_ (W)w);	2213	clear_pending (EV_A_ (W)w);
1727	if (expect_false (!ev_is_active (w)))	2214	if (expect_false (!ev_is_active (w)))
1728	return;	2215	return;
1729		2216
1730	{	2217	{
1731	int active = ((W)w)->active;	2218	int active = ((W)w)->active;
1732	idles [active - 1] = idles [--idlecnt];	2219
		2220	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
1733	((W)idles [active - 1])->active = active;	2221	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2222
		2223	ev_stop (EV_A_ (W)w);
		2224	--idleall;
1734	}	2225	}
1735
1736	ev_stop (EV_A_ (W)w);
1737	}	2226	}
		2227	#endif
1738		2228
1739	void	2229	void
1740	ev_prepare_start (EV_P_ ev_prepare *w)	2230	ev_prepare_start (EV_P_ ev_prepare *w)
1741	{	2231	{
1742	if (expect_false (ev_is_active (w)))	2232	if (expect_false (ev_is_active (w)))
…		…
1748	}	2238	}
1749		2239
1750	void	2240	void
1751	ev_prepare_stop (EV_P_ ev_prepare *w)	2241	ev_prepare_stop (EV_P_ ev_prepare *w)
1752	{	2242	{
1753	ev_clear_pending (EV_A_ (W)w);	2243	clear_pending (EV_A_ (W)w);
1754	if (expect_false (!ev_is_active (w)))	2244	if (expect_false (!ev_is_active (w)))
1755	return;	2245	return;
1756		2246
1757	{	2247	{
1758	int active = ((W)w)->active;	2248	int active = ((W)w)->active;
…		…
1775	}	2265	}
1776		2266
1777	void	2267	void
1778	ev_check_stop (EV_P_ ev_check *w)	2268	ev_check_stop (EV_P_ ev_check *w)
1779	{	2269	{
1780	ev_clear_pending (EV_A_ (W)w);	2270	clear_pending (EV_A_ (W)w);
1781	if (expect_false (!ev_is_active (w)))	2271	if (expect_false (!ev_is_active (w)))
1782	return;	2272	return;
1783		2273
1784	{	2274	{
1785	int active = ((W)w)->active;	2275	int active = ((W)w)->active;
…		…
1792		2282
1793	#if EV_EMBED_ENABLE	2283	#if EV_EMBED_ENABLE
1794	void noinline	2284	void noinline
1795	ev_embed_sweep (EV_P_ ev_embed *w)	2285	ev_embed_sweep (EV_P_ ev_embed *w)
1796	{	2286	{
1797	ev_loop (w->loop, EVLOOP_NONBLOCK);	2287	ev_loop (w->other, EVLOOP_NONBLOCK);
1798	}	2288	}
1799		2289
1800	static void	2290	static void
1801	embed_cb (EV_P_ ev_io *io, int revents)	2291	embed_io_cb (EV_P_ ev_io *io, int revents)
1802	{	2292	{
1803	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));	2293	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
1804		2294
1805	if (ev_cb (w))	2295	if (ev_cb (w))
1806	ev_feed_event (EV_A_ (W)w, EV_EMBED);	2296	ev_feed_event (EV_A_ (W)w, EV_EMBED);
1807	else	2297	else
1808	ev_embed_sweep (loop, w);	2298	ev_loop (w->other, EVLOOP_NONBLOCK);
1809	}	2299	}
		2300
		2301	static void
		2302	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2303	{
		2304	ev_embed w = (ev_embed )(((char *)prepare) - offsetof (ev_embed, prepare));
		2305
		2306	{
		2307	struct ev_loop *loop = w->other;
		2308
		2309	while (fdchangecnt)
		2310	{
		2311	fd_reify (EV_A);
		2312	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2313	}
		2314	}
		2315	}
		2316
		2317	#if 0
		2318	static void
		2319	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2320	{
		2321	ev_idle_stop (EV_A_ idle);
		2322	}
		2323	#endif
1810		2324
1811	void	2325	void
1812	ev_embed_start (EV_P_ ev_embed *w)	2326	ev_embed_start (EV_P_ ev_embed *w)
1813	{	2327	{
1814	if (expect_false (ev_is_active (w)))	2328	if (expect_false (ev_is_active (w)))
1815	return;	2329	return;
1816		2330
1817	{	2331	{
1818	struct ev_loop *loop = w->loop;	2332	struct ev_loop *loop = w->other;
1819	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	2333	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
1820	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);	2334	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
1821	}	2335	}
1822		2336
1823	ev_set_priority (&w->io, ev_priority (w));	2337	ev_set_priority (&w->io, ev_priority (w));
1824	ev_io_start (EV_A_ &w->io);	2338	ev_io_start (EV_A_ &w->io);
1825		2339
		2340	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2341	ev_set_priority (&w->prepare, EV_MINPRI);
		2342	ev_prepare_start (EV_A_ &w->prepare);
		2343
		2344	/ev_idle_init (&w->idle, e,bed_idle_cb);/
		2345
1826	ev_start (EV_A_ (W)w, 1);	2346	ev_start (EV_A_ (W)w, 1);
1827	}	2347	}
1828		2348
1829	void	2349	void
1830	ev_embed_stop (EV_P_ ev_embed *w)	2350	ev_embed_stop (EV_P_ ev_embed *w)
1831	{	2351	{
1832	ev_clear_pending (EV_A_ (W)w);	2352	clear_pending (EV_A_ (W)w);
1833	if (expect_false (!ev_is_active (w)))	2353	if (expect_false (!ev_is_active (w)))
1834	return;	2354	return;
1835		2355
1836	ev_io_stop (EV_A_ &w->io);	2356	ev_io_stop (EV_A_ &w->io);
		2357	ev_prepare_stop (EV_A_ &w->prepare);
1837		2358
1838	ev_stop (EV_A_ (W)w);	2359	ev_stop (EV_A_ (W)w);
1839	}	2360	}
1840	#endif	2361	#endif
1841		2362
…		…
1852	}	2373	}
1853		2374
1854	void	2375	void
1855	ev_fork_stop (EV_P_ ev_fork *w)	2376	ev_fork_stop (EV_P_ ev_fork *w)
1856	{	2377	{
1857	ev_clear_pending (EV_A_ (W)w);	2378	clear_pending (EV_A_ (W)w);
1858	if (expect_false (!ev_is_active (w)))	2379	if (expect_false (!ev_is_active (w)))
1859	return;	2380	return;
1860		2381
1861	{	2382	{
1862	int active = ((W)w)->active;	2383	int active = ((W)w)->active;
…		…
1930	ev_timer_set (&once->to, timeout, 0.);	2451	ev_timer_set (&once->to, timeout, 0.);
1931	ev_timer_start (EV_A_ &once->to);	2452	ev_timer_start (EV_A_ &once->to);
1932	}	2453	}
1933	}	2454	}
1934		2455
		2456	#if EV_MULTIPLICITY
		2457	#include "ev_wrap.h"
		2458	#endif
		2459
1935	#ifdef __cplusplus	2460	#ifdef __cplusplus
1936	}	2461	}
1937	#endif	2462	#endif
1938		2463

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Comparing libev/ev.c (file contents): Revision 1.148 by root, Tue Nov 27 11:11:13 2007 UTC vs. Revision 1.206 by root, Fri Jan 25 15:45:08 2008 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.148 by root, Tue Nov 27 11:11:13 2007 UTC vs.
Revision 1.206 by root, Fri Jan 25 15:45:08 2008 UTC