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Comparing libev/ev.c (file contents):
Revision 1.55 by root, Sun Nov 4 00:39:24 2007 UTC vs.
Revision 1.208 by root, Fri Feb 1 13:22:48 2008 UTC

1	/*	1	/*
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) 2007,2008 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	*/
		39
		40	#ifdef __cplusplus
		41	extern "C" {
		42	#endif
		43
31	#ifndef EV_STANDALONE	44	#ifndef EV_STANDALONE
		45	# ifdef EV_CONFIG_H
		46	# include EV_CONFIG_H
		47	# else
32	# include "config.h"	48	# include "config.h"
		49	# endif
		50
		51	# if HAVE_CLOCK_GETTIME
		52	# ifndef EV_USE_MONOTONIC
		53	# define EV_USE_MONOTONIC 1
		54	# endif
		55	# ifndef EV_USE_REALTIME
		56	# define EV_USE_REALTIME 1
		57	# endif
		58	# else
		59	# ifndef EV_USE_MONOTONIC
		60	# define EV_USE_MONOTONIC 0
		61	# endif
		62	# ifndef EV_USE_REALTIME
		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
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_SELECT
		76	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		77	# define EV_USE_SELECT 1
		78	# else
		79	# define EV_USE_SELECT 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_POLL
		84	# if HAVE_POLL && HAVE_POLL_H
		85	# define EV_USE_POLL 1
		86	# else
		87	# define EV_USE_POLL 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_EPOLL
		92	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		93	# define EV_USE_EPOLL 1
		94	# else
		95	# define EV_USE_EPOLL 0
		96	# endif
		97	# endif
		98
		99	# ifndef EV_USE_KQUEUE
		100	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		101	# define EV_USE_KQUEUE 1
		102	# else
		103	# define EV_USE_KQUEUE 0
		104	# endif
		105	# endif
		106
		107	# ifndef EV_USE_PORT
		108	# if HAVE_PORT_H && HAVE_PORT_CREATE
		109	# define EV_USE_PORT 1
		110	# else
		111	# define EV_USE_PORT 0
		112	# endif
		113	# endif
		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
33	#endif	123	#endif
34		124
35	#include <math.h>	125	#include <math.h>
36	#include <stdlib.h>	126	#include <stdlib.h>
37	#include <unistd.h>
38	#include <fcntl.h>	127	#include <fcntl.h>
39	#include <signal.h>
40	#include <stddef.h>	128	#include <stddef.h>
41		129
42	#include <stdio.h>	130	#include <stdio.h>
43		131
44	#include <assert.h>	132	#include <assert.h>
45	#include <errno.h>	133	#include <errno.h>
46	#include <sys/types.h>	134	#include <sys/types.h>
		135	#include <time.h>
		136
		137	#include <signal.h>
		138
		139	#ifdef EV_H
		140	# include EV_H
		141	#else
		142	# include "ev.h"
		143	#endif
		144
47	#ifndef WIN32	145	#ifndef _WIN32
		146	# include <sys/time.h>
48	# include <sys/wait.h>	147	# include <sys/wait.h>
		148	# include <unistd.h>
		149	#else
		150	# define WIN32_LEAN_AND_MEAN
		151	# include <windows.h>
		152	# ifndef EV_SELECT_IS_WINSOCKET
		153	# define EV_SELECT_IS_WINSOCKET 1
49	#endif	154	# endif
50	#include <sys/time.h>	155	#endif
51	#include <time.h>
52		156
53	/**/	157	/**/
54		158
55	#ifndef EV_USE_MONOTONIC	159	#ifndef EV_USE_MONOTONIC
56	# define EV_USE_MONOTONIC 1	160	# define EV_USE_MONOTONIC 0
		161	#endif
		162
		163	#ifndef EV_USE_REALTIME
		164	# define EV_USE_REALTIME 0
		165	#endif
		166
		167	#ifndef EV_USE_NANOSLEEP
		168	# define EV_USE_NANOSLEEP 0
57	#endif	169	#endif
58		170
59	#ifndef EV_USE_SELECT	171	#ifndef EV_USE_SELECT
60	# define EV_USE_SELECT 1	172	# define EV_USE_SELECT 1
61	#endif	173	#endif
62		174
63	#ifndef EV_USEV_POLL	175	#ifndef EV_USE_POLL
64	# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */	176	# ifdef _WIN32
		177	# define EV_USE_POLL 0
		178	# else
		179	# define EV_USE_POLL 1
		180	# endif
65	#endif	181	#endif
66		182
67	#ifndef EV_USE_EPOLL	183	#ifndef EV_USE_EPOLL
68	# define EV_USE_EPOLL 0	184	# define EV_USE_EPOLL 0
69	#endif	185	#endif
70		186
71	#ifndef EV_USE_KQUEUE	187	#ifndef EV_USE_KQUEUE
72	# define EV_USE_KQUEUE 0	188	# define EV_USE_KQUEUE 0
73	#endif	189	#endif
74		190
75	#ifndef EV_USE_REALTIME	191	#ifndef EV_USE_PORT
76	# define EV_USE_REALTIME 1	192	# define EV_USE_PORT 0
		193	#endif
		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
77	#endif	213	#endif
78		214
79	/**/	215	/**/
80		216
81	#ifndef CLOCK_MONOTONIC	217	#ifndef CLOCK_MONOTONIC
…		…
86	#ifndef CLOCK_REALTIME	222	#ifndef CLOCK_REALTIME
87	# undef EV_USE_REALTIME	223	# undef EV_USE_REALTIME
88	# define EV_USE_REALTIME 0	224	# define EV_USE_REALTIME 0
89	#endif	225	#endif
90		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
		242	#if EV_SELECT_IS_WINSOCKET
		243	# include <winsock.h>
		244	#endif
		245
91	/**/	246	/**/
92		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
93	#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) */
94	#define MAX_BLOCKTIME 59.731 /* 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) */
95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
96	/*#define CLEANUP_INTERVAL 300. /* 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 */
97		261
98	#include "ev.h"
99
100	#if __GNUC__ >= 3	262	#if __GNUC__ >= 4
101	# define expect(expr,value) __builtin_expect ((expr),(value))	263	# define expect(expr,value) __builtin_expect ((expr),(value))
102	# define inline inline	264	# define noinline __attribute__ ((noinline))
103	#else	265	#else
104	# define expect(expr,value) (expr)	266	# define expect(expr,value) (expr)
105	# define inline static	267	# define noinline
		268	# if __STDC_VERSION__ < 199901L
		269	# define inline
		270	# endif
106	#endif	271	#endif
107		272
108	#define expect_false(expr) expect ((expr) != 0, 0)	273	#define expect_false(expr) expect ((expr) != 0, 0)
109	#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
110		282
111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	283	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	284	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
113		285
		286	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		287	#define EMPTY2(a,b) /* used to suppress some warnings */
		288
114	typedef struct ev_watcher *W;	289	typedef ev_watcher *W;
115	typedef struct ev_watcher_list *WL;	290	typedef ev_watcher_list *WL;
116	typedef struct ev_watcher_time *WT;	291	typedef ev_watcher_time *WT;
117		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 */
118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	296	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		297	#endif
		298
		299	#ifdef _WIN32
		300	# include "ev_win32.c"
		301	#endif
119		302
120	/*****************************************************************************/	303	/*****************************************************************************/
121		304
		305	static void (*syserr_cb)(const char *msg);
		306
		307	void
		308	ev_set_syserr_cb (void (*cb)(const char *msg))
		309	{
		310	syserr_cb = cb;
		311	}
		312
		313	static void noinline
		314	syserr (const char *msg)
		315	{
		316	if (!msg)
		317	msg = "(libev) system error";
		318
		319	if (syserr_cb)
		320	syserr_cb (msg);
		321	else
		322	{
		323	perror (msg);
		324	abort ();
		325	}
		326	}
		327
		328	static void *(*alloc)(void *ptr, long size);
		329
		330	void
		331	ev_set_allocator (void *(*cb)(void *ptr, long size))
		332	{
		333	alloc = cb;
		334	}
		335
		336	inline_speed void *
		337	ev_realloc (void *ptr, long size)
		338	{
		339	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		340
		341	if (!ptr && size)
		342	{
		343	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		344	abort ();
		345	}
		346
		347	return ptr;
		348	}
		349
		350	#define ev_malloc(size) ev_realloc (0, (size))
		351	#define ev_free(ptr) ev_realloc ((ptr), 0)
		352
		353	/*****************************************************************************/
		354
122	typedef struct	355	typedef struct
123	{	356	{
124	struct ev_watcher_list *head;	357	WL head;
125	unsigned char events;	358	unsigned char events;
126	unsigned char reify;	359	unsigned char reify;
		360	#if EV_SELECT_IS_WINSOCKET
		361	SOCKET handle;
		362	#endif
127	} ANFD;	363	} ANFD;
128		364
129	typedef struct	365	typedef struct
130	{	366	{
131	W w;	367	W w;
132	int events;	368	int events;
133	} ANPENDING;	369	} ANPENDING;
134		370
		371	#if EV_USE_INOTIFY
		372	typedef struct
		373	{
		374	WL head;
		375	} ANFS;
		376	#endif
		377
135	#if EV_MULTIPLICITY	378	#if EV_MULTIPLICITY
136		379
137	struct ev_loop	380	struct ev_loop
138	{	381	{
		382	ev_tstamp ev_rt_now;
		383	#define ev_rt_now ((loop)->ev_rt_now)
139	# define VAR(name,decl) decl;	384	#define VAR(name,decl) decl;
140	# include "ev_vars.h"	385	#include "ev_vars.h"
141	};
142	# undef VAR	386	#undef VAR
		387	};
143	# include "ev_wrap.h"	388	#include "ev_wrap.h"
		389
		390	static struct ev_loop default_loop_struct;
		391	struct ev_loop *ev_default_loop_ptr;
144		392
145	#else	393	#else
146		394
		395	ev_tstamp ev_rt_now;
147	# define VAR(name,decl) static decl;	396	#define VAR(name,decl) static decl;
148	# include "ev_vars.h"	397	#include "ev_vars.h"
149	# undef VAR	398	#undef VAR
		399
		400	static int ev_default_loop_ptr;
150		401
151	#endif	402	#endif
152		403
153	/*****************************************************************************/	404	/*****************************************************************************/
154		405
155	inline ev_tstamp	406	ev_tstamp
156	ev_time (void)	407	ev_time (void)
157	{	408	{
158	#if EV_USE_REALTIME	409	#if EV_USE_REALTIME
159	struct timespec ts;	410	struct timespec ts;
160	clock_gettime (CLOCK_REALTIME, &ts);	411	clock_gettime (CLOCK_REALTIME, &ts);
…		…
164	gettimeofday (&tv, 0);	415	gettimeofday (&tv, 0);
165	return tv.tv_sec + tv.tv_usec * 1e-6;	416	return tv.tv_sec + tv.tv_usec * 1e-6;
166	#endif	417	#endif
167	}	418	}
168		419
169	inline ev_tstamp	420	ev_tstamp inline_size
170	get_clock (void)	421	get_clock (void)
171	{	422	{
172	#if EV_USE_MONOTONIC	423	#if EV_USE_MONOTONIC
173	if (expect_true (have_monotonic))	424	if (expect_true (have_monotonic))
174	{	425	{
…		…
179	#endif	430	#endif
180		431
181	return ev_time ();	432	return ev_time ();
182	}	433	}
183		434
		435	#if EV_MULTIPLICITY
184	ev_tstamp	436	ev_tstamp
185	ev_now (EV_P)	437	ev_now (EV_P)
186	{	438	{
187	return rt_now;	439	return ev_rt_now;
188	}	440	}
		441	#endif
189		442
190	#define array_roundsize(base,n) ((n) | 4 & ~3)	443	void
191		444	ev_sleep (ev_tstamp delay)
192	#define array_needsize(base,cur,cnt,init) \	445	{
193	if (expect_false ((cnt) > cur)) \	446	if (delay > 0.)
194	{ \
195	int newcnt = cur; \
196	do \
197	{ \
198	newcnt = array_roundsize (base, newcnt << 1); \
199	} \
200	while ((cnt) > newcnt); \
201	\
202	base = realloc (base, sizeof (*base) * (newcnt)); \
203	init (base + cur, newcnt - cur); \
204	cur = newcnt; \
205	}	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	}
206		467
207	/*****************************************************************************/	468	/*****************************************************************************/
208		469
209	static void	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	}
		497
		498	#define array_needsize(type,base,cur,cnt,init) \
		499	if (expect_false ((cnt) > (cur))) \
		500	{ \
		501	int ocur_ = (cur); \
		502	(base) = (type *)array_realloc \
		503	(sizeof (type), (base), &(cur), (cnt)); \
		504	init ((base) + (ocur_), (cur) - ocur_); \
		505	}
		506
		507	#if 0
		508	#define array_slim(type,stem) \
		509	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		510	{ \
		511	stem ## max = array_roundsize (stem ## cnt >> 1); \
		512	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		513	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		514	}
		515	#endif
		516
		517	#define array_free(stem, idx) \
		518	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		519
		520	/*****************************************************************************/
		521
		522	void noinline
		523	ev_feed_event (EV_P_ void *w, int revents)
		524	{
		525	W w_ = (W)w;
		526	int pri = ABSPRI (w_);
		527
		528	if (expect_false (w_->pending))
		529	pendings [pri][w_->pending - 1].events |= revents;
		530	else
		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_;
		535	pendings [pri][w_->pending - 1].events = revents;
		536	}
		537	}
		538
		539	void inline_speed
		540	queue_events (EV_P_ W *events, int eventcnt, int type)
		541	{
		542	int i;
		543
		544	for (i = 0; i < eventcnt; ++i)
		545	ev_feed_event (EV_A_ events [i], type);
		546	}
		547
		548	/*****************************************************************************/
		549
		550	void inline_size
210	anfds_init (ANFD *base, int count)	551	anfds_init (ANFD *base, int count)
211	{	552	{
212	while (count--)	553	while (count--)
213	{	554	{
214	base->head = 0;	555	base->head = 0;
…		…
217		558
218	++base;	559	++base;
219	}	560	}
220	}	561	}
221		562
222	static void	563	void inline_speed
223	event (EV_P_ W w, int events)
224	{
225	if (w->pending)
226	{
227	pendings [ABSPRI (w)][w->pending - 1].events |= events;
228	return;
229	}
230
231	w->pending = ++pendingcnt [ABSPRI (w)];
232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
233	pendings [ABSPRI (w)][w->pending - 1].w = w;
234	pendings [ABSPRI (w)][w->pending - 1].events = events;
235	}
236
237	static void
238	queue_events (EV_P_ W *events, int eventcnt, int type)
239	{
240	int i;
241
242	for (i = 0; i < eventcnt; ++i)
243	event (EV_A_ events [i], type);
244	}
245
246	static void
247	fd_event (EV_P_ int fd, int events)	564	fd_event (EV_P_ int fd, int revents)
248	{	565	{
249	ANFD *anfd = anfds + fd;	566	ANFD *anfd = anfds + fd;
250	struct ev_io *w;	567	ev_io *w;
251		568
252	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	569	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
253	{	570	{
254	int ev = w->events & events;	571	int ev = w->events & revents;
255		572
256	if (ev)	573	if (ev)
257	event (EV_A_ (W)w, ev);	574	ev_feed_event (EV_A_ (W)w, ev);
258	}	575	}
259	}	576	}
260		577
261	/*****************************************************************************/	578	void
		579	ev_feed_fd_event (EV_P_ int fd, int revents)
		580	{
		581	if (fd >= 0 && fd < anfdmax)
		582	fd_event (EV_A_ fd, revents);
		583	}
262		584
263	static void	585	void inline_size
264	fd_reify (EV_P)	586	fd_reify (EV_P)
265	{	587	{
266	int i;	588	int i;
267		589
268	for (i = 0; i < fdchangecnt; ++i)	590	for (i = 0; i < fdchangecnt; ++i)
269	{	591	{
270	int fd = fdchanges [i];	592	int fd = fdchanges [i];
271	ANFD *anfd = anfds + fd;	593	ANFD *anfd = anfds + fd;
272	struct ev_io *w;	594	ev_io *w;
273		595
274	int events = 0;	596	unsigned char events = 0;
275		597
276	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	598	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
277	events |= w->events;	599	events |= (unsigned char)w->events;
278		600
279	anfd->reify = 0;	601	#if EV_SELECT_IS_WINSOCKET
280		602	if (events)
281	if (anfd->events != events)
282	{	603	{
283	method_modify (EV_A_ fd, anfd->events, events);	604	unsigned long argp;
284	anfd->events = events;	605	#ifdef EV_FD_TO_WIN32_HANDLE
		606	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		607	#else
		608	anfd->handle = _get_osfhandle (fd);
		609	#endif
		610	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
285	}	611	}
		612	#endif
		613
		614	{
		615	unsigned char o_events = anfd->events;
		616	unsigned char o_reify = anfd->reify;
		617
		618	anfd->reify = 0;
		619	anfd->events = events;
		620
		621	if (o_events != events || o_reify & EV_IOFDSET)
		622	backend_modify (EV_A_ fd, o_events, events);
		623	}
286	}	624	}
287		625
288	fdchangecnt = 0;	626	fdchangecnt = 0;
289	}	627	}
290		628
291	static void	629	void inline_size
292	fd_change (EV_P_ int fd)	630	fd_change (EV_P_ int fd, int flags)
293	{	631	{
294	if (anfds [fd].reify || fdchangecnt < 0)	632	unsigned char reify = anfds [fd].reify;
295	return;
296
297	anfds [fd].reify = 1;	633	anfds [fd].reify |= flags;
298		634
		635	if (expect_true (!reify))
		636	{
299	++fdchangecnt;	637	++fdchangecnt;
300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	638	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
301	fdchanges [fdchangecnt - 1] = fd;	639	fdchanges [fdchangecnt - 1] = fd;
		640	}
302	}	641	}
303		642
304	static void	643	void inline_speed
305	fd_kill (EV_P_ int fd)	644	fd_kill (EV_P_ int fd)
306	{	645	{
307	struct ev_io *w;	646	ev_io *w;
308		647
309	while ((w = (struct ev_io *)anfds [fd].head))	648	while ((w = (ev_io *)anfds [fd].head))
310	{	649	{
311	ev_io_stop (EV_A_ w);	650	ev_io_stop (EV_A_ w);
312	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	651	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
313	}	652	}
		653	}
		654
		655	int inline_size
		656	fd_valid (int fd)
		657	{
		658	#ifdef _WIN32
		659	return _get_osfhandle (fd) != -1;
		660	#else
		661	return fcntl (fd, F_GETFD) != -1;
		662	#endif
314	}	663	}
315		664
316	/* called on EBADF to verify fds */	665	/* called on EBADF to verify fds */
317	static void	666	static void noinline
318	fd_ebadf (EV_P)	667	fd_ebadf (EV_P)
319	{	668	{
320	int fd;	669	int fd;
321		670
322	for (fd = 0; fd < anfdmax; ++fd)	671	for (fd = 0; fd < anfdmax; ++fd)
323	if (anfds [fd].events)	672	if (anfds [fd].events)
324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	673	if (!fd_valid (fd) == -1 && errno == EBADF)
325	fd_kill (EV_A_ fd);	674	fd_kill (EV_A_ fd);
326	}	675	}
327		676
328	/* called on ENOMEM in select/poll to kill some fds and retry */	677	/* called on ENOMEM in select/poll to kill some fds and retry */
329	static void	678	static void noinline
330	fd_enomem (EV_P)	679	fd_enomem (EV_P)
331	{	680	{
332	int fd = anfdmax;	681	int fd;
333		682
334	while (fd--)	683	for (fd = anfdmax; fd--; )
335	if (anfds [fd].events)	684	if (anfds [fd].events)
336	{	685	{
337	close (fd);
338	fd_kill (EV_A_ fd);	686	fd_kill (EV_A_ fd);
339	return;	687	return;
340	}	688	}
341	}	689	}
342		690
		691	/* usually called after fork if backend needs to re-arm all fds from scratch */
		692	static void noinline
		693	fd_rearm_all (EV_P)
		694	{
		695	int fd;
		696
		697	for (fd = 0; fd < anfdmax; ++fd)
		698	if (anfds [fd].events)
		699	{
		700	anfds [fd].events = 0;
		701	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		702	}
		703	}
		704
343	/*****************************************************************************/	705	/*****************************************************************************/
344		706
345	static void	707	void inline_speed
346	upheap (WT *heap, int k)	708	upheap (WT *heap, int k)
347	{	709	{
348	WT w = heap [k];	710	WT w = heap [k];
349		711
350	while (k && heap [k >> 1]->at > w->at)	712	while (k)
351	{	713	{
		714	int p = (k - 1) >> 1;
		715
		716	if (heap [p]->at <= w->at)
		717	break;
		718
352	heap [k] = heap [k >> 1];	719	heap [k] = heap [p];
353	heap [k]->active = k + 1;	720	((W)heap [k])->active = k + 1;
354	k >>= 1;	721	k = p;
355	}	722	}
356		723
357	heap [k] = w;	724	heap [k] = w;
358	heap [k]->active = k + 1;	725	((W)heap [k])->active = k + 1;
359
360	}	726	}
361		727
362	static void	728	void inline_speed
363	downheap (WT *heap, int N, int k)	729	downheap (WT *heap, int N, int k)
364	{	730	{
365	WT w = heap [k];	731	WT w = heap [k];
366		732
367	while (k < (N >> 1))	733	for (;;)
368	{	734	{
369	int j = k << 1;	735	int c = (k << 1) + 1;
370		736
371	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	737	if (c >= N)
372	++j;
373
374	if (w->at <= heap [j]->at)
375	break;	738	break;
376		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
377	heap [k] = heap [j];	746	heap [k] = heap [c];
378	heap [k]->active = k + 1;	747	((W)heap [k])->active = k + 1;
		748
379	k = j;	749	k = c;
380	}	750	}
381		751
382	heap [k] = w;	752	heap [k] = w;
383	heap [k]->active = k + 1;	753	((W)heap [k])->active = k + 1;
		754	}
		755
		756	void inline_size
		757	adjustheap (WT *heap, int N, int k)
		758	{
		759	upheap (heap, k);
		760	downheap (heap, N, k);
384	}	761	}
385		762
386	/*****************************************************************************/	763	/*****************************************************************************/
387		764
388	typedef struct	765	typedef struct
389	{	766	{
390	struct ev_watcher_list *head;	767	WL head;
391	sig_atomic_t volatile gotsig;	768	EV_ATOMIC_T gotsig;
392	} ANSIG;	769	} ANSIG;
393		770
394	static ANSIG *signals;	771	static ANSIG *signals;
395	static int signalmax;	772	static int signalmax;
396		773
397	static int sigpipe [2];	774	static EV_ATOMIC_T gotsig;
398	static sig_atomic_t volatile gotsig;
399		775
400	static void	776	void inline_size
401	signals_init (ANSIG *base, int count)	777	signals_init (ANSIG *base, int count)
402	{	778	{
403	while (count--)	779	while (count--)
404	{	780	{
405	base->head = 0;	781	base->head = 0;
…		…
407		783
408	++base;	784	++base;
409	}	785	}
410	}	786	}
411		787
		788	/*****************************************************************************/
		789
		790	void inline_speed
		791	fd_intern (int fd)
		792	{
		793	#ifdef _WIN32
		794	int arg = 1;
		795	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		796	#else
		797	fcntl (fd, F_SETFD, FD_CLOEXEC);
		798	fcntl (fd, F_SETFL, O_NONBLOCK);
		799	#endif
		800	}
		801
		802	static void noinline
		803	evpipe_init (EV_P)
		804	{
		805	if (!ev_is_active (&pipeev))
		806	{
		807	while (pipe (evpipe))
		808	syserr ("(libev) error creating signal/async pipe");
		809
		810	fd_intern (evpipe [0]);
		811	fd_intern (evpipe [1]);
		812
		813	ev_io_set (&pipeev, evpipe [0], EV_READ);
		814	ev_io_start (EV_A_ &pipeev);
		815	ev_unref (EV_A); /* child watcher should not keep loop alive */
		816	}
		817	}
		818
		819	void inline_size
		820	evpipe_write (EV_P_ int sig, int async)
		821	{
		822	if (!(gotasync || gotsig))
		823	{
		824	int old_errno = errno;
		825
		826	if (sig) gotsig = 1;
		827	if (async) gotasync = 1;
		828
		829	write (evpipe [1], &old_errno, 1);
		830	errno = old_errno;
		831	}
		832	}
		833
		834	static void
		835	pipecb (EV_P_ ev_io *iow, int revents)
		836	{
		837	{
		838	int dummy;
		839	read (evpipe [0], &dummy, 1);
		840	}
		841
		842	if (gotsig)
		843	{
		844	int signum;
		845	gotsig = 0;
		846
		847	for (signum = signalmax; signum--; )
		848	if (signals [signum].gotsig)
		849	ev_feed_signal_event (EV_A_ signum + 1);
		850	}
		851
		852	if (gotasync)
		853	{
		854	int i;
		855	gotasync = 0;
		856
		857	for (i = asynccnt; i--; )
		858	if (asyncs [i]->sent)
		859	{
		860	asyncs [i]->sent = 0;
		861	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		862	}
		863	}
		864	}
		865
		866	/*****************************************************************************/
		867
412	static void	868	static void
413	sighandler (int signum)	869	sighandler (int signum)
414	{	870	{
		871	#if EV_MULTIPLICITY
		872	struct ev_loop *loop = &default_loop_struct;
		873	#endif
		874
		875	#if _WIN32
		876	signal (signum, sighandler);
		877	#endif
		878
415	signals [signum - 1].gotsig = 1;	879	signals [signum - 1].gotsig = 1;
416		880	evpipe_write (EV_A_ 1, 0);
417	if (!gotsig)
418	{
419	int old_errno = errno;
420	gotsig = 1;
421	write (sigpipe [1], &signum, 1);
422	errno = old_errno;
423	}
424	}	881	}
425		882
426	static void	883	void noinline
427	sigcb (EV_P_ struct ev_io *iow, int revents)	884	ev_feed_signal_event (EV_P_ int signum)
428	{	885	{
429	struct ev_watcher_list *w;	886	WL w;
		887
		888	#if EV_MULTIPLICITY
		889	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		890	#endif
		891
430	int signum;	892	--signum;
431		893
432	read (sigpipe [0], &revents, 1);	894	if (signum < 0 || signum >= signalmax)
433	gotsig = 0;	895	return;
434		896
435	for (signum = signalmax; signum--; )
436	if (signals [signum].gotsig)
437	{
438	signals [signum].gotsig = 0;	897	signals [signum].gotsig = 0;
439		898
440	for (w = signals [signum].head; w; w = w->next)	899	for (w = signals [signum].head; w; w = w->next)
441	event (EV_A_ (W)w, EV_SIGNAL);	900	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
442	}
443	}
444
445	static void
446	siginit (EV_P)
447	{
448	#ifndef WIN32
449	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
450	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
451
452	/* rather than sort out wether we really need nb, set it */
453	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
454	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
455	#endif
456
457	ev_io_set (&sigev, sigpipe [0], EV_READ);
458	ev_io_start (EV_A_ &sigev);
459	ev_unref (EV_A); /* child watcher should not keep loop alive */
460	}	901	}
461		902
462	/*****************************************************************************/	903	/*****************************************************************************/
463		904
		905	static WL childs [EV_PID_HASHSIZE];
		906
464	#ifndef WIN32	907	#ifndef _WIN32
		908
		909	static ev_signal childev;
		910
		911	#ifndef WIFCONTINUED
		912	# define WIFCONTINUED(status) 0
		913	#endif
		914
		915	void inline_speed
		916	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		917	{
		918	ev_child *w;
		919	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		920
		921	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		922	{
		923	if ((w->pid == pid || !w->pid)
		924	&& (!traced || (w->flags & 1)))
		925	{
		926	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
		927	w->rpid = pid;
		928	w->rstatus = status;
		929	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		930	}
		931	}
		932	}
465		933
466	#ifndef WCONTINUED	934	#ifndef WCONTINUED
467	# define WCONTINUED 0	935	# define WCONTINUED 0
468	#endif	936	#endif
469		937
470	static void	938	static void
471	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
472	{
473	struct ev_child *w;
474
475	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
476	if (w->pid == pid || !w->pid)
477	{
478	w->priority = sw->priority; /* need to do it *now* */
479	w->rpid = pid;
480	w->rstatus = status;
481	event (EV_A_ (W)w, EV_CHILD);
482	}
483	}
484
485	static void
486	childcb (EV_P_ struct ev_signal *sw, int revents)	939	childcb (EV_P_ ev_signal *sw, int revents)
487	{	940	{
488	int pid, status;	941	int pid, status;
489		942
		943	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
490	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	944	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
491	{	945	if (!WCONTINUED
		946	|| errno != EINVAL
		947	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		948	return;
		949
492	/* make sure we are called again until all childs have been reaped */	950	/* make sure we are called again until all childs have been reaped */
		951	/* we need to do it this way so that the callback gets called before we continue */
493	event (EV_A_ (W)sw, EV_SIGNAL);	952	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
494		953
495	child_reap (EV_A_ sw, pid, pid, status);	954	child_reap (EV_A_ sw, pid, pid, status);
		955	if (EV_PID_HASHSIZE > 1)
496	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	956	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
497	}
498	}	957	}
499		958
500	#endif	959	#endif
501		960
502	/*****************************************************************************/	961	/*****************************************************************************/
503		962
		963	#if EV_USE_PORT
		964	# include "ev_port.c"
		965	#endif
504	#if EV_USE_KQUEUE	966	#if EV_USE_KQUEUE
505	# include "ev_kqueue.c"	967	# include "ev_kqueue.c"
506	#endif	968	#endif
507	#if EV_USE_EPOLL	969	#if EV_USE_EPOLL
508	# include "ev_epoll.c"	970	# include "ev_epoll.c"
509	#endif	971	#endif
510	#if EV_USEV_POLL	972	#if EV_USE_POLL
511	# include "ev_poll.c"	973	# include "ev_poll.c"
512	#endif	974	#endif
513	#if EV_USE_SELECT	975	#if EV_USE_SELECT
514	# include "ev_select.c"	976	# include "ev_select.c"
515	#endif	977	#endif
…		…
525	{	987	{
526	return EV_VERSION_MINOR;	988	return EV_VERSION_MINOR;
527	}	989	}
528		990
529	/* return true if we are running with elevated privileges and should ignore env variables */	991	/* return true if we are running with elevated privileges and should ignore env variables */
530	static int	992	int inline_size
531	enable_secure (void)	993	enable_secure (void)
532	{	994	{
533	#ifdef WIN32	995	#ifdef _WIN32
534	return 0;	996	return 0;
535	#else	997	#else
536	return getuid () != geteuid ()	998	return getuid () != geteuid ()
537	|| getgid () != getegid ();	999	|| getgid () != getegid ();
538	#endif	1000	#endif
539	}	1001	}
540		1002
541	int	1003	unsigned int
542	ev_method (EV_P)	1004	ev_supported_backends (void)
543	{	1005	{
544	return method;	1006	unsigned int flags = 0;
545	}
546		1007
547	inline int	1008	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
548	loop_init (EV_P_ int methods)	1009	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1010	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1011	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1012	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1013
		1014	return flags;
		1015	}
		1016
		1017	unsigned int
		1018	ev_recommended_backends (void)
549	{	1019	{
550	if (!method)	1020	unsigned int flags = ev_supported_backends ();
		1021
		1022	#ifndef __NetBSD__
		1023	/* kqueue is borked on everything but netbsd apparently */
		1024	/* it usually doesn't work correctly on anything but sockets and pipes */
		1025	flags &= ~EVBACKEND_KQUEUE;
		1026	#endif
		1027	#ifdef __APPLE__
		1028	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1029	flags &= ~EVBACKEND_POLL;
		1030	#endif
		1031
		1032	return flags;
		1033	}
		1034
		1035	unsigned int
		1036	ev_embeddable_backends (void)
		1037	{
		1038	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1039
		1040	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1041	/* please fix it and tell me how to detect the fix */
		1042	flags &= ~EVBACKEND_EPOLL;
		1043
		1044	return flags;
		1045	}
		1046
		1047	unsigned int
		1048	ev_backend (EV_P)
		1049	{
		1050	return backend;
		1051	}
		1052
		1053	unsigned int
		1054	ev_loop_count (EV_P)
		1055	{
		1056	return loop_count;
		1057	}
		1058
		1059	void
		1060	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1061	{
		1062	io_blocktime = interval;
		1063	}
		1064
		1065	void
		1066	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1067	{
		1068	timeout_blocktime = interval;
		1069	}
		1070
		1071	static void noinline
		1072	loop_init (EV_P_ unsigned int flags)
		1073	{
		1074	if (!backend)
551	{	1075	{
552	#if EV_USE_MONOTONIC	1076	#if EV_USE_MONOTONIC
553	{	1077	{
554	struct timespec ts;	1078	struct timespec ts;
555	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1079	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
556	have_monotonic = 1;	1080	have_monotonic = 1;
557	}	1081	}
558	#endif	1082	#endif
559		1083
560	rt_now = ev_time ();	1084	ev_rt_now = ev_time ();
561	mn_now = get_clock ();	1085	mn_now = get_clock ();
562	now_floor = mn_now;	1086	now_floor = mn_now;
563	rtmn_diff = rt_now - mn_now;	1087	rtmn_diff = ev_rt_now - mn_now;
564		1088
565	if (pipe (sigpipe))	1089	io_blocktime = 0.;
566	return 0;	1090	timeout_blocktime = 0.;
567		1091
568	if (methods == EVMETHOD_AUTO)	1092	/* pid check not overridable via env */
569	if (!enable_secure () && getenv ("LIBmethodS"))	1093	#ifndef _WIN32
570	methods = atoi (getenv ("LIBmethodS"));	1094	if (flags & EVFLAG_FORKCHECK)
571	else	1095	curpid = getpid ();
572	methods = EVMETHOD_ANY;	1096	#endif
573		1097
574	method = 0;	1098	if (!(flags & EVFLAG_NOENV)
		1099	&& !enable_secure ()
		1100	&& getenv ("LIBEV_FLAGS"))
		1101	flags = atoi (getenv ("LIBEV_FLAGS"));
		1102
		1103	if (!(flags & 0x0000ffffUL))
		1104	flags |= ev_recommended_backends ();
		1105
		1106	backend = 0;
		1107	backend_fd = -1;
		1108	#if EV_USE_INOTIFY
		1109	fs_fd = -2;
		1110	#endif
		1111
		1112	#if EV_USE_PORT
		1113	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1114	#endif
575	#if EV_USE_KQUEUE	1115	#if EV_USE_KQUEUE
576	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);	1116	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
577	#endif	1117	#endif
578	#if EV_USE_EPOLL	1118	#if EV_USE_EPOLL
579	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);	1119	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
580	#endif	1120	#endif
581	#if EV_USEV_POLL	1121	#if EV_USE_POLL
582	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);	1122	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
583	#endif	1123	#endif
584	#if EV_USE_SELECT	1124	#if EV_USE_SELECT
585	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);	1125	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
586	#endif	1126	#endif
587		1127
588	if (method)	1128	ev_init (&pipeev, pipecb);
		1129	ev_set_priority (&pipeev, EV_MAXPRI);
		1130	}
		1131	}
		1132
		1133	static void noinline
		1134	loop_destroy (EV_P)
		1135	{
		1136	int i;
		1137
		1138	if (ev_is_active (&pipeev))
		1139	{
		1140	ev_ref (EV_A); /* signal watcher */
		1141	ev_io_stop (EV_A_ &pipeev);
		1142
		1143	close (evpipe [0]); evpipe [0] = 0;
		1144	close (evpipe [1]); evpipe [1] = 0;
		1145	}
		1146
		1147	#if EV_USE_INOTIFY
		1148	if (fs_fd >= 0)
		1149	close (fs_fd);
		1150	#endif
		1151
		1152	if (backend_fd >= 0)
		1153	close (backend_fd);
		1154
		1155	#if EV_USE_PORT
		1156	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1157	#endif
		1158	#if EV_USE_KQUEUE
		1159	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1160	#endif
		1161	#if EV_USE_EPOLL
		1162	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1163	#endif
		1164	#if EV_USE_POLL
		1165	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1166	#endif
		1167	#if EV_USE_SELECT
		1168	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1169	#endif
		1170
		1171	for (i = NUMPRI; i--; )
		1172	{
		1173	array_free (pending, [i]);
		1174	#if EV_IDLE_ENABLE
		1175	array_free (idle, [i]);
		1176	#endif
		1177	}
		1178
		1179	ev_free (anfds); anfdmax = 0;
		1180
		1181	/* have to use the microsoft-never-gets-it-right macro */
		1182	array_free (fdchange, EMPTY);
		1183	array_free (timer, EMPTY);
		1184	#if EV_PERIODIC_ENABLE
		1185	array_free (periodic, EMPTY);
		1186	#endif
		1187	#if EV_FORK_ENABLE
		1188	array_free (fork, EMPTY);
		1189	#endif
		1190	array_free (prepare, EMPTY);
		1191	array_free (check, EMPTY);
		1192
		1193	backend = 0;
		1194	}
		1195
		1196	void inline_size infy_fork (EV_P);
		1197
		1198	void inline_size
		1199	loop_fork (EV_P)
		1200	{
		1201	#if EV_USE_PORT
		1202	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1203	#endif
		1204	#if EV_USE_KQUEUE
		1205	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1206	#endif
		1207	#if EV_USE_EPOLL
		1208	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1209	#endif
		1210	#if EV_USE_INOTIFY
		1211	infy_fork (EV_A);
		1212	#endif
		1213
		1214	if (ev_is_active (&pipeev))
		1215	{
		1216	/* this "locks" the handlers against writing to the pipe */
		1217	gotsig = gotasync = 1;
		1218
		1219	ev_ref (EV_A);
		1220	ev_io_stop (EV_A_ &pipeev);
		1221	close (evpipe [0]);
		1222	close (evpipe [1]);
		1223
		1224	evpipe_init (EV_A);
		1225	/* now iterate over everything, in case we missed something */
		1226	pipecb (EV_A_ &pipeev, EV_READ);
		1227	}
		1228
		1229	postfork = 0;
		1230	}
		1231
		1232	#if EV_MULTIPLICITY
		1233	struct ev_loop *
		1234	ev_loop_new (unsigned int flags)
		1235	{
		1236	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1237
		1238	memset (loop, 0, sizeof (struct ev_loop));
		1239
		1240	loop_init (EV_A_ flags);
		1241
		1242	if (ev_backend (EV_A))
		1243	return loop;
		1244
		1245	return 0;
		1246	}
		1247
		1248	void
		1249	ev_loop_destroy (EV_P)
		1250	{
		1251	loop_destroy (EV_A);
		1252	ev_free (loop);
		1253	}
		1254
		1255	void
		1256	ev_loop_fork (EV_P)
		1257	{
		1258	postfork = 1; /* must be in line with ev_default_fork */
		1259	}
		1260
		1261	#endif
		1262
		1263	#if EV_MULTIPLICITY
		1264	struct ev_loop *
		1265	ev_default_loop_init (unsigned int flags)
		1266	#else
		1267	int
		1268	ev_default_loop (unsigned int flags)
		1269	#endif
		1270	{
		1271	if (!ev_default_loop_ptr)
		1272	{
		1273	#if EV_MULTIPLICITY
		1274	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1275	#else
		1276	ev_default_loop_ptr = 1;
		1277	#endif
		1278
		1279	loop_init (EV_A_ flags);
		1280
		1281	if (ev_backend (EV_A))
589	{	1282	{
590	ev_watcher_init (&sigev, sigcb);
591	ev_set_priority (&sigev, EV_MAXPRI);
592	siginit (EV_A);
593
594	#ifndef WIN32	1283	#ifndef _WIN32
595	ev_signal_init (&childev, childcb, SIGCHLD);	1284	ev_signal_init (&childev, childcb, SIGCHLD);
596	ev_set_priority (&childev, EV_MAXPRI);	1285	ev_set_priority (&childev, EV_MAXPRI);
597	ev_signal_start (EV_A_ &childev);	1286	ev_signal_start (EV_A_ &childev);
598	ev_unref (EV_A); /* child watcher should not keep loop alive */	1287	ev_unref (EV_A); /* child watcher should not keep loop alive */
599	#endif	1288	#endif
600	}	1289	}
		1290	else
		1291	ev_default_loop_ptr = 0;
601	}	1292	}
602		1293
603	return method;	1294	return ev_default_loop_ptr;
604	}	1295	}
605		1296
		1297	void
		1298	ev_default_destroy (void)
		1299	{
606	#if EV_MULTIPLICITY	1300	#if EV_MULTIPLICITY
607		1301	struct ev_loop *loop = ev_default_loop_ptr;
608	struct ev_loop *
609	ev_loop_new (int methods)
610	{
611	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
612
613	if (loop_init (EV_A_ methods))
614	return loop;
615
616	ev_loop_delete (loop);
617
618	return 0;
619	}
620
621	void
622	ev_loop_delete (EV_P)
623	{
624	/*TODO*/
625	free (loop);
626	}
627
628	#else
629
630	int
631	ev_init (int methods)
632	{
633	return loop_init (methods);
634	}
635
636	#endif	1302	#endif
		1303
		1304	#ifndef _WIN32
		1305	ev_ref (EV_A); /* child watcher */
		1306	ev_signal_stop (EV_A_ &childev);
		1307	#endif
		1308
		1309	loop_destroy (EV_A);
		1310	}
		1311
		1312	void
		1313	ev_default_fork (void)
		1314	{
		1315	#if EV_MULTIPLICITY
		1316	struct ev_loop *loop = ev_default_loop_ptr;
		1317	#endif
		1318
		1319	if (backend)
		1320	postfork = 1; /* must be in line with ev_loop_fork */
		1321	}
637		1322
638	/*****************************************************************************/	1323	/*****************************************************************************/
639		1324
640	void	1325	void
641	ev_fork_prepare (void)	1326	ev_invoke (EV_P_ void *w, int revents)
642	{	1327	{
643	/* nop */	1328	EV_CB_INVOKE ((W)w, revents);
644	}	1329	}
645		1330
646	void	1331	void inline_speed
647	ev_fork_parent (void)
648	{
649	/* nop */
650	}
651
652	void
653	ev_fork_child (void)
654	{
655	/*TODO*/
656	#if !EV_MULTIPLICITY
657	#if EV_USE_EPOLL
658	if (method == EVMETHOD_EPOLL)
659	epoll_postfork_child (EV_A);
660	#endif
661
662	ev_io_stop (EV_A_ &sigev);
663	close (sigpipe [0]);
664	close (sigpipe [1]);
665	pipe (sigpipe);
666	siginit (EV_A);
667	#endif
668	}
669
670	/*****************************************************************************/
671
672	static void
673	call_pending (EV_P)	1332	call_pending (EV_P)
674	{	1333	{
675	int pri;	1334	int pri;
676		1335
677	for (pri = NUMPRI; pri--; )	1336	for (pri = NUMPRI; pri--; )
678	while (pendingcnt [pri])	1337	while (pendingcnt [pri])
679	{	1338	{
680	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1339	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
681		1340
682	if (p->w)	1341	if (expect_true (p->w))
683	{	1342	{
		1343	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1344
684	p->w->pending = 0;	1345	p->w->pending = 0;
685	p->w->cb (EV_A_ p->w, p->events);	1346	EV_CB_INVOKE (p->w, p->events);
686	}	1347	}
687	}	1348	}
688	}	1349	}
689		1350
690	static void	1351	void inline_size
691	timers_reify (EV_P)	1352	timers_reify (EV_P)
692	{	1353	{
693	while (timercnt && timers [0]->at <= mn_now)	1354	while (timercnt && ((WT)timers [0])->at <= mn_now)
694	{	1355	{
695	struct ev_timer *w = timers [0];	1356	ev_timer *w = (ev_timer *)timers [0];
		1357
		1358	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
696		1359
697	/* first reschedule or stop timer */	1360	/* first reschedule or stop timer */
698	if (w->repeat)	1361	if (w->repeat)
699	{	1362	{
700	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1363	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1364
701	w->at = mn_now + w->repeat;	1365	((WT)w)->at += w->repeat;
		1366	if (((WT)w)->at < mn_now)
		1367	((WT)w)->at = mn_now;
		1368
702	downheap ((WT *)timers, timercnt, 0);	1369	downheap (timers, timercnt, 0);
703	}	1370	}
704	else	1371	else
705	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1372	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
706		1373
707	event (EV_A_ (W)w, EV_TIMEOUT);	1374	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
708	}	1375	}
709	}	1376	}
710		1377
711	static void	1378	#if EV_PERIODIC_ENABLE
		1379	void inline_size
712	periodics_reify (EV_P)	1380	periodics_reify (EV_P)
713	{	1381	{
714	while (periodiccnt && periodics [0]->at <= rt_now)	1382	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
715	{	1383	{
716	struct ev_periodic *w = periodics [0];	1384	ev_periodic *w = (ev_periodic *)periodics [0];
		1385
		1386	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
717		1387
718	/* first reschedule or stop timer */	1388	/* first reschedule or stop timer */
719	if (w->interval)	1389	if (w->reschedule_cb)
720	{	1390	{
		1391	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1392	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1393	downheap (periodics, periodiccnt, 0);
		1394	}
		1395	else if (w->interval)
		1396	{
721	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;	1397	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1398	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
722	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));	1399	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
723	downheap ((WT *)periodics, periodiccnt, 0);	1400	downheap (periodics, periodiccnt, 0);
724	}	1401	}
725	else	1402	else
726	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1403	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
727		1404
728	event (EV_A_ (W)w, EV_PERIODIC);	1405	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
729	}	1406	}
730	}	1407	}
731		1408
732	static void	1409	static void noinline
733	periodics_reschedule (EV_P)	1410	periodics_reschedule (EV_P)
734	{	1411	{
735	int i;	1412	int i;
736		1413
737	/* adjust periodics after time jump */	1414	/* adjust periodics after time jump */
738	for (i = 0; i < periodiccnt; ++i)	1415	for (i = 0; i < periodiccnt; ++i)
739	{	1416	{
740	struct ev_periodic *w = periodics [i];	1417	ev_periodic *w = (ev_periodic *)periodics [i];
741		1418
		1419	if (w->reschedule_cb)
		1420	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
742	if (w->interval)	1421	else if (w->interval)
		1422	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1423	}
		1424
		1425	/* now rebuild the heap */
		1426	for (i = periodiccnt >> 1; i--; )
		1427	downheap (periodics, periodiccnt, i);
		1428	}
		1429	#endif
		1430
		1431	#if EV_IDLE_ENABLE
		1432	void inline_size
		1433	idle_reify (EV_P)
		1434	{
		1435	if (expect_false (idleall))
		1436	{
		1437	int pri;
		1438
		1439	for (pri = NUMPRI; pri--; )
743	{	1440	{
744	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;	1441	if (pendingcnt [pri])
		1442	break;
745		1443
746	if (fabs (diff) >= 1e-4)	1444	if (idlecnt [pri])
747	{	1445	{
748	ev_periodic_stop (EV_A_ w);	1446	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
749	ev_periodic_start (EV_A_ w);	1447	break;
750
751	i = 0; /* restart loop, inefficient, but time jumps should be rare */
752	}	1448	}
753	}	1449	}
754	}	1450	}
755	}	1451	}
		1452	#endif
756		1453
757	inline int	1454	void inline_speed
758	time_update_monotonic (EV_P)	1455	time_update (EV_P_ ev_tstamp max_block)
759	{
760	mn_now = get_clock ();
761
762	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
763	{
764	rt_now = rtmn_diff + mn_now;
765	return 0;
766	}
767	else
768	{
769	now_floor = mn_now;
770	rt_now = ev_time ();
771	return 1;
772	}
773	}
774
775	static void
776	time_update (EV_P)
777	{	1456	{
778	int i;	1457	int i;
779		1458
780	#if EV_USE_MONOTONIC	1459	#if EV_USE_MONOTONIC
781	if (expect_true (have_monotonic))	1460	if (expect_true (have_monotonic))
782	{	1461	{
783	if (time_update_monotonic (EV_A))	1462	ev_tstamp odiff = rtmn_diff;
		1463
		1464	mn_now = get_clock ();
		1465
		1466	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1467	/* interpolate in the meantime */
		1468	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
784	{	1469	{
785	ev_tstamp odiff = rtmn_diff;	1470	ev_rt_now = rtmn_diff + mn_now;
		1471	return;
		1472	}
786		1473
		1474	now_floor = mn_now;
		1475	ev_rt_now = ev_time ();
		1476
787	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1477	/* loop a few times, before making important decisions.
		1478	* on the choice of "4": one iteration isn't enough,
		1479	* in case we get preempted during the calls to
		1480	* ev_time and get_clock. a second call is almost guaranteed
		1481	* to succeed in that case, though. and looping a few more times
		1482	* doesn't hurt either as we only do this on time-jumps or
		1483	* in the unlikely event of having been preempted here.
		1484	*/
		1485	for (i = 4; --i; )
788	{	1486	{
789	rtmn_diff = rt_now - mn_now;	1487	rtmn_diff = ev_rt_now - mn_now;
790		1488
791	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1489	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
792	return; /* all is well */	1490	return; /* all is well */
793		1491
794	rt_now = ev_time ();	1492	ev_rt_now = ev_time ();
795	mn_now = get_clock ();	1493	mn_now = get_clock ();
796	now_floor = mn_now;	1494	now_floor = mn_now;
797	}	1495	}
798		1496
		1497	# if EV_PERIODIC_ENABLE
		1498	periodics_reschedule (EV_A);
		1499	# endif
		1500	/* no timer adjustment, as the monotonic clock doesn't jump */
		1501	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1502	}
		1503	else
		1504	#endif
		1505	{
		1506	ev_rt_now = ev_time ();
		1507
		1508	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1509	{
		1510	#if EV_PERIODIC_ENABLE
799	periodics_reschedule (EV_A);	1511	periodics_reschedule (EV_A);
800	/* no timer adjustment, as the monotonic clock doesn't jump */	1512	#endif
801	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */	1513	/* adjust timers. this is easy, as the offset is the same for all of them */
		1514	for (i = 0; i < timercnt; ++i)
		1515	((WT)timers [i])->at += ev_rt_now - mn_now;
802	}	1516	}
803	}
804	else
805	#endif
806	{
807	rt_now = ev_time ();
808		1517
809	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
810	{
811	periodics_reschedule (EV_A);
812
813	/* adjust timers. this is easy, as the offset is the same for all */
814	for (i = 0; i < timercnt; ++i)
815	timers [i]->at += rt_now - mn_now;
816	}
817
818	mn_now = rt_now;	1518	mn_now = ev_rt_now;
819	}	1519	}
820	}	1520	}
821		1521
822	void	1522	void
823	ev_ref (EV_P)	1523	ev_ref (EV_P)
…		…
834	static int loop_done;	1534	static int loop_done;
835		1535
836	void	1536	void
837	ev_loop (EV_P_ int flags)	1537	ev_loop (EV_P_ int flags)
838	{	1538	{
839	double block;
840	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1539	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1540	? EVUNLOOP_ONE
		1541	: EVUNLOOP_CANCEL;
		1542
		1543	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
841		1544
842	do	1545	do
843	{	1546	{
		1547	#ifndef _WIN32
		1548	if (expect_false (curpid)) /* penalise the forking check even more */
		1549	if (expect_false (getpid () != curpid))
		1550	{
		1551	curpid = getpid ();
		1552	postfork = 1;
		1553	}
		1554	#endif
		1555
		1556	#if EV_FORK_ENABLE
		1557	/* we might have forked, so queue fork handlers */
		1558	if (expect_false (postfork))
		1559	if (forkcnt)
		1560	{
		1561	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1562	call_pending (EV_A);
		1563	}
		1564	#endif
		1565
844	/* queue check watchers (and execute them) */	1566	/* queue prepare watchers (and execute them) */
845	if (expect_false (preparecnt))	1567	if (expect_false (preparecnt))
846	{	1568	{
847	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1569	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
848	call_pending (EV_A);	1570	call_pending (EV_A);
849	}	1571	}
850		1572
		1573	if (expect_false (!activecnt))
		1574	break;
		1575
		1576	/* we might have forked, so reify kernel state if necessary */
		1577	if (expect_false (postfork))
		1578	loop_fork (EV_A);
		1579
851	/* update fd-related kernel structures */	1580	/* update fd-related kernel structures */
852	fd_reify (EV_A);	1581	fd_reify (EV_A);
853		1582
854	/* calculate blocking time */	1583	/* calculate blocking time */
		1584	{
		1585	ev_tstamp waittime = 0.;
		1586	ev_tstamp sleeptime = 0.;
855		1587
856	/* we only need this for !monotonic clockor timers, but as we basically	1588	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
857	always have timers, we just calculate it always */
858	#if EV_USE_MONOTONIC
859	if (expect_true (have_monotonic))
860	time_update_monotonic (EV_A);
861	else
862	#endif
863	{	1589	{
864	rt_now = ev_time ();	1590	/* update time to cancel out callback processing overhead */
865	mn_now = rt_now;	1591	time_update (EV_A_ 1e100);
866	}
867		1592
868	if (flags & EVLOOP_NONBLOCK || idlecnt)
869	block = 0.;
870	else
871	{
872	block = MAX_BLOCKTIME;	1593	waittime = MAX_BLOCKTIME;
873		1594
874	if (timercnt)	1595	if (timercnt)
875	{	1596	{
876	ev_tstamp to = timers [0]->at - mn_now + method_fudge;	1597	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
877	if (block > to) block = to;	1598	if (waittime > to) waittime = to;
878	}	1599	}
879		1600
		1601	#if EV_PERIODIC_ENABLE
880	if (periodiccnt)	1602	if (periodiccnt)
881	{	1603	{
882	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;	1604	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
883	if (block > to) block = to;	1605	if (waittime > to) waittime = to;
884	}	1606	}
		1607	#endif
885		1608
886	if (block < 0.) block = 0.;	1609	if (expect_false (waittime < timeout_blocktime))
		1610	waittime = timeout_blocktime;
		1611
		1612	sleeptime = waittime - backend_fudge;
		1613
		1614	if (expect_true (sleeptime > io_blocktime))
		1615	sleeptime = io_blocktime;
		1616
		1617	if (sleeptime)
		1618	{
		1619	ev_sleep (sleeptime);
		1620	waittime -= sleeptime;
		1621	}
887	}	1622	}
888		1623
889	method_poll (EV_A_ block);	1624	++loop_count;
		1625	backend_poll (EV_A_ waittime);
890		1626
891	/* update rt_now, do magic */	1627	/* update ev_rt_now, do magic */
892	time_update (EV_A);	1628	time_update (EV_A_ waittime + sleeptime);
		1629	}
893		1630
894	/* queue pending timers and reschedule them */	1631	/* queue pending timers and reschedule them */
895	timers_reify (EV_A); /* relative timers called last */	1632	timers_reify (EV_A); /* relative timers called last */
		1633	#if EV_PERIODIC_ENABLE
896	periodics_reify (EV_A); /* absolute timers called first */	1634	periodics_reify (EV_A); /* absolute timers called first */
		1635	#endif
897		1636
		1637	#if EV_IDLE_ENABLE
898	/* queue idle watchers unless io or timers are pending */	1638	/* queue idle watchers unless other events are pending */
899	if (!pendingcnt)	1639	idle_reify (EV_A);
900	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	1640	#endif
901		1641
902	/* queue check watchers, to be executed first */	1642	/* queue check watchers, to be executed first */
903	if (checkcnt)	1643	if (expect_false (checkcnt))
904	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1644	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
905		1645
906	call_pending (EV_A);	1646	call_pending (EV_A);
		1647
907	}	1648	}
908	while (activecnt && !loop_done);	1649	while (expect_true (activecnt && !loop_done));
909		1650
910	if (loop_done != 2)	1651	if (loop_done == EVUNLOOP_ONE)
911	loop_done = 0;	1652	loop_done = EVUNLOOP_CANCEL;
912	}	1653	}
913		1654
914	void	1655	void
915	ev_unloop (EV_P_ int how)	1656	ev_unloop (EV_P_ int how)
916	{	1657	{
917	loop_done = how;	1658	loop_done = how;
918	}	1659	}
919		1660
920	/*****************************************************************************/	1661	/*****************************************************************************/
921		1662
922	inline void	1663	void inline_size
923	wlist_add (WL *head, WL elem)	1664	wlist_add (WL *head, WL elem)
924	{	1665	{
925	elem->next = *head;	1666	elem->next = *head;
926	*head = elem;	1667	*head = elem;
927	}	1668	}
928		1669
929	inline void	1670	void inline_size
930	wlist_del (WL *head, WL elem)	1671	wlist_del (WL *head, WL elem)
931	{	1672	{
932	while (*head)	1673	while (*head)
933	{	1674	{
934	if (*head == elem)	1675	if (*head == elem)
…		…
939		1680
940	head = &(*head)->next;	1681	head = &(*head)->next;
941	}	1682	}
942	}	1683	}
943		1684
944	inline void	1685	void inline_speed
945	ev_clear_pending (EV_P_ W w)	1686	clear_pending (EV_P_ W w)
946	{	1687	{
947	if (w->pending)	1688	if (w->pending)
948	{	1689	{
949	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1690	pendings [ABSPRI (w)][w->pending - 1].w = 0;
950	w->pending = 0;	1691	w->pending = 0;
951	}	1692	}
952	}	1693	}
953		1694
954	inline void	1695	int
		1696	ev_clear_pending (EV_P_ void *w)
		1697	{
		1698	W w_ = (W)w;
		1699	int pending = w_->pending;
		1700
		1701	if (expect_true (pending))
		1702	{
		1703	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1704	w_->pending = 0;
		1705	p->w = 0;
		1706	return p->events;
		1707	}
		1708	else
		1709	return 0;
		1710	}
		1711
		1712	void inline_size
		1713	pri_adjust (EV_P_ W w)
		1714	{
		1715	int pri = w->priority;
		1716	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1717	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1718	w->priority = pri;
		1719	}
		1720
		1721	void inline_speed
955	ev_start (EV_P_ W w, int active)	1722	ev_start (EV_P_ W w, int active)
956	{	1723	{
957	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1724	pri_adjust (EV_A_ w);
958	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
959
960	w->active = active;	1725	w->active = active;
961	ev_ref (EV_A);	1726	ev_ref (EV_A);
962	}	1727	}
963		1728
964	inline void	1729	void inline_size
965	ev_stop (EV_P_ W w)	1730	ev_stop (EV_P_ W w)
966	{	1731	{
967	ev_unref (EV_A);	1732	ev_unref (EV_A);
968	w->active = 0;	1733	w->active = 0;
969	}	1734	}
970		1735
971	/*****************************************************************************/	1736	/*****************************************************************************/
972		1737
973	void	1738	void noinline
974	ev_io_start (EV_P_ struct ev_io *w)	1739	ev_io_start (EV_P_ ev_io *w)
975	{	1740	{
976	int fd = w->fd;	1741	int fd = w->fd;
977		1742
978	if (ev_is_active (w))	1743	if (expect_false (ev_is_active (w)))
979	return;	1744	return;
980		1745
981	assert (("ev_io_start called with negative fd", fd >= 0));	1746	assert (("ev_io_start called with negative fd", fd >= 0));
982		1747
983	ev_start (EV_A_ (W)w, 1);	1748	ev_start (EV_A_ (W)w, 1);
984	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1749	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
985	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1750	wlist_add (&anfds[fd].head, (WL)w);
986		1751
987	fd_change (EV_A_ fd);	1752	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1753	w->events &= ~EV_IOFDSET;
988	}	1754	}
989		1755
990	void	1756	void noinline
991	ev_io_stop (EV_P_ struct ev_io *w)	1757	ev_io_stop (EV_P_ ev_io *w)
992	{	1758	{
993	ev_clear_pending (EV_A_ (W)w);	1759	clear_pending (EV_A_ (W)w);
994	if (!ev_is_active (w))	1760	if (expect_false (!ev_is_active (w)))
995	return;	1761	return;
996		1762
		1763	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1764
997	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1765	wlist_del (&anfds[w->fd].head, (WL)w);
998	ev_stop (EV_A_ (W)w);	1766	ev_stop (EV_A_ (W)w);
999		1767
1000	fd_change (EV_A_ w->fd);	1768	fd_change (EV_A_ w->fd, 1);
1001	}	1769	}
1002		1770
1003	void	1771	void noinline
1004	ev_timer_start (EV_P_ struct ev_timer *w)	1772	ev_timer_start (EV_P_ ev_timer *w)
1005	{	1773	{
1006	if (ev_is_active (w))	1774	if (expect_false (ev_is_active (w)))
1007	return;	1775	return;
1008		1776
1009	w->at += mn_now;	1777	((WT)w)->at += mn_now;
1010		1778
1011	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1779	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1012		1780
1013	ev_start (EV_A_ (W)w, ++timercnt);	1781	ev_start (EV_A_ (W)w, ++timercnt);
1014	array_needsize (timers, timermax, timercnt, );	1782	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
1015	timers [timercnt - 1] = w;	1783	timers [timercnt - 1] = (WT)w;
1016	upheap ((WT *)timers, timercnt - 1);	1784	upheap (timers, timercnt - 1);
1017	}
1018		1785
1019	void	1786	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1787	}
		1788
		1789	void noinline
1020	ev_timer_stop (EV_P_ struct ev_timer *w)	1790	ev_timer_stop (EV_P_ ev_timer *w)
1021	{	1791	{
1022	ev_clear_pending (EV_A_ (W)w);	1792	clear_pending (EV_A_ (W)w);
1023	if (!ev_is_active (w))	1793	if (expect_false (!ev_is_active (w)))
1024	return;	1794	return;
1025		1795
1026	if (w->active < timercnt--)	1796	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1797
		1798	{
		1799	int active = ((W)w)->active;
		1800
		1801	if (expect_true (--active < --timercnt))
1027	{	1802	{
1028	timers [w->active - 1] = timers [timercnt];	1803	timers [active] = timers [timercnt];
1029	downheap ((WT *)timers, timercnt, w->active - 1);	1804	adjustheap (timers, timercnt, active);
1030	}	1805	}
		1806	}
1031		1807
1032	w->at = w->repeat;	1808	((WT)w)->at -= mn_now;
1033		1809
1034	ev_stop (EV_A_ (W)w);	1810	ev_stop (EV_A_ (W)w);
1035	}	1811	}
1036		1812
1037	void	1813	void noinline
1038	ev_timer_again (EV_P_ struct ev_timer *w)	1814	ev_timer_again (EV_P_ ev_timer *w)
1039	{	1815	{
1040	if (ev_is_active (w))	1816	if (ev_is_active (w))
1041	{	1817	{
1042	if (w->repeat)	1818	if (w->repeat)
1043	{	1819	{
1044	w->at = mn_now + w->repeat;	1820	((WT)w)->at = mn_now + w->repeat;
1045	downheap ((WT *)timers, timercnt, w->active - 1);	1821	adjustheap (timers, timercnt, ((W)w)->active - 1);
1046	}	1822	}
1047	else	1823	else
1048	ev_timer_stop (EV_A_ w);	1824	ev_timer_stop (EV_A_ w);
1049	}	1825	}
1050	else if (w->repeat)	1826	else if (w->repeat)
		1827	{
		1828	w->at = w->repeat;
1051	ev_timer_start (EV_A_ w);	1829	ev_timer_start (EV_A_ w);
		1830	}
1052	}	1831	}
1053		1832
1054	void	1833	#if EV_PERIODIC_ENABLE
		1834	void noinline
1055	ev_periodic_start (EV_P_ struct ev_periodic *w)	1835	ev_periodic_start (EV_P_ ev_periodic *w)
1056	{	1836	{
1057	if (ev_is_active (w))	1837	if (expect_false (ev_is_active (w)))
1058	return;	1838	return;
1059		1839
		1840	if (w->reschedule_cb)
		1841	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1842	else if (w->interval)
		1843	{
1060	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1844	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1061
1062	/* this formula differs from the one in periodic_reify because we do not always round up */	1845	/* this formula differs from the one in periodic_reify because we do not always round up */
1063	if (w->interval)
1064	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;	1846	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1847	}
		1848	else
		1849	((WT)w)->at = w->offset;
1065		1850
1066	ev_start (EV_A_ (W)w, ++periodiccnt);	1851	ev_start (EV_A_ (W)w, ++periodiccnt);
1067	array_needsize (periodics, periodicmax, periodiccnt, );	1852	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
1068	periodics [periodiccnt - 1] = w;	1853	periodics [periodiccnt - 1] = (WT)w;
1069	upheap ((WT *)periodics, periodiccnt - 1);	1854	upheap (periodics, periodiccnt - 1);
1070	}
1071		1855
1072	void	1856	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1857	}
		1858
		1859	void noinline
1073	ev_periodic_stop (EV_P_ struct ev_periodic *w)	1860	ev_periodic_stop (EV_P_ ev_periodic *w)
1074	{	1861	{
1075	ev_clear_pending (EV_A_ (W)w);	1862	clear_pending (EV_A_ (W)w);
1076	if (!ev_is_active (w))	1863	if (expect_false (!ev_is_active (w)))
1077	return;	1864	return;
1078		1865
1079	if (w->active < periodiccnt--)	1866	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1867
		1868	{
		1869	int active = ((W)w)->active;
		1870
		1871	if (expect_true (--active < --periodiccnt))
1080	{	1872	{
1081	periodics [w->active - 1] = periodics [periodiccnt];	1873	periodics [active] = periodics [periodiccnt];
1082	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1874	adjustheap (periodics, periodiccnt, active);
1083	}	1875	}
		1876	}
1084		1877
1085	ev_stop (EV_A_ (W)w);	1878	ev_stop (EV_A_ (W)w);
1086	}	1879	}
		1880
		1881	void noinline
		1882	ev_periodic_again (EV_P_ ev_periodic *w)
		1883	{
		1884	/* TODO: use adjustheap and recalculation */
		1885	ev_periodic_stop (EV_A_ w);
		1886	ev_periodic_start (EV_A_ w);
		1887	}
		1888	#endif
1087		1889
1088	#ifndef SA_RESTART	1890	#ifndef SA_RESTART
1089	# define SA_RESTART 0	1891	# define SA_RESTART 0
1090	#endif	1892	#endif
1091		1893
1092	void	1894	void noinline
1093	ev_signal_start (EV_P_ struct ev_signal *w)	1895	ev_signal_start (EV_P_ ev_signal *w)
1094	{	1896	{
		1897	#if EV_MULTIPLICITY
		1898	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1899	#endif
1095	if (ev_is_active (w))	1900	if (expect_false (ev_is_active (w)))
1096	return;	1901	return;
1097		1902
1098	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1903	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1099		1904
		1905	evpipe_init (EV_A);
		1906
		1907	{
		1908	#ifndef _WIN32
		1909	sigset_t full, prev;
		1910	sigfillset (&full);
		1911	sigprocmask (SIG_SETMASK, &full, &prev);
		1912	#endif
		1913
		1914	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1915
		1916	#ifndef _WIN32
		1917	sigprocmask (SIG_SETMASK, &prev, 0);
		1918	#endif
		1919	}
		1920
1100	ev_start (EV_A_ (W)w, 1);	1921	ev_start (EV_A_ (W)w, 1);
1101	array_needsize (signals, signalmax, w->signum, signals_init);
1102	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1922	wlist_add (&signals [w->signum - 1].head, (WL)w);
1103		1923
1104	if (!w->next)	1924	if (!((WL)w)->next)
1105	{	1925	{
		1926	#if _WIN32
		1927	signal (w->signum, sighandler);
		1928	#else
1106	struct sigaction sa;	1929	struct sigaction sa;
1107	sa.sa_handler = sighandler;	1930	sa.sa_handler = sighandler;
1108	sigfillset (&sa.sa_mask);	1931	sigfillset (&sa.sa_mask);
1109	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	1932	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1110	sigaction (w->signum, &sa, 0);	1933	sigaction (w->signum, &sa, 0);
		1934	#endif
1111	}	1935	}
1112	}	1936	}
1113		1937
1114	void	1938	void noinline
1115	ev_signal_stop (EV_P_ struct ev_signal *w)	1939	ev_signal_stop (EV_P_ ev_signal *w)
1116	{	1940	{
1117	ev_clear_pending (EV_A_ (W)w);	1941	clear_pending (EV_A_ (W)w);
1118	if (!ev_is_active (w))	1942	if (expect_false (!ev_is_active (w)))
1119	return;	1943	return;
1120		1944
1121	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1945	wlist_del (&signals [w->signum - 1].head, (WL)w);
1122	ev_stop (EV_A_ (W)w);	1946	ev_stop (EV_A_ (W)w);
1123		1947
1124	if (!signals [w->signum - 1].head)	1948	if (!signals [w->signum - 1].head)
1125	signal (w->signum, SIG_DFL);	1949	signal (w->signum, SIG_DFL);
1126	}	1950	}
1127		1951
1128	void	1952	void
1129	ev_idle_start (EV_P_ struct ev_idle *w)	1953	ev_child_start (EV_P_ ev_child *w)
1130	{	1954	{
		1955	#if EV_MULTIPLICITY
		1956	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1957	#endif
1131	if (ev_is_active (w))	1958	if (expect_false (ev_is_active (w)))
1132	return;	1959	return;
1133		1960
1134	ev_start (EV_A_ (W)w, ++idlecnt);	1961	ev_start (EV_A_ (W)w, 1);
1135	array_needsize (idles, idlemax, idlecnt, );	1962	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1136	idles [idlecnt - 1] = w;
1137	}	1963	}
1138		1964
1139	void	1965	void
1140	ev_idle_stop (EV_P_ struct ev_idle *w)	1966	ev_child_stop (EV_P_ ev_child *w)
1141	{	1967	{
1142	ev_clear_pending (EV_A_ (W)w);	1968	clear_pending (EV_A_ (W)w);
1143	if (ev_is_active (w))	1969	if (expect_false (!ev_is_active (w)))
1144	return;	1970	return;
1145		1971
1146	idles [w->active - 1] = idles [--idlecnt];	1972	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1147	ev_stop (EV_A_ (W)w);	1973	ev_stop (EV_A_ (W)w);
1148	}	1974	}
1149		1975
		1976	#if EV_STAT_ENABLE
		1977
		1978	# ifdef _WIN32
		1979	# undef lstat
		1980	# define lstat(a,b) _stati64 (a,b)
		1981	# endif
		1982
		1983	#define DEF_STAT_INTERVAL 5.0074891
		1984	#define MIN_STAT_INTERVAL 0.1074891
		1985
		1986	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1987
		1988	#if EV_USE_INOTIFY
		1989	# define EV_INOTIFY_BUFSIZE 8192
		1990
		1991	static void noinline
		1992	infy_add (EV_P_ ev_stat *w)
		1993	{
		1994	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);
		1995
		1996	if (w->wd < 0)
		1997	{
		1998	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1999
		2000	/* monitor some parent directory for speedup hints */
		2001	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2002	{
		2003	char path [4096];
		2004	strcpy (path, w->path);
		2005
		2006	do
		2007	{
		2008	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2009	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2010
		2011	char *pend = strrchr (path, '/');
		2012
		2013	if (!pend)
		2014	break; /* whoops, no '/', complain to your admin */
		2015
		2016	*pend = 0;
		2017	w->wd = inotify_add_watch (fs_fd, path, mask);
		2018	}
		2019	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2020	}
		2021	}
		2022	else
		2023	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2024
		2025	if (w->wd >= 0)
		2026	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2027	}
		2028
		2029	static void noinline
		2030	infy_del (EV_P_ ev_stat *w)
		2031	{
		2032	int slot;
		2033	int wd = w->wd;
		2034
		2035	if (wd < 0)
		2036	return;
		2037
		2038	w->wd = -2;
		2039	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2040	wlist_del (&fs_hash [slot].head, (WL)w);
		2041
		2042	/* remove this watcher, if others are watching it, they will rearm */
		2043	inotify_rm_watch (fs_fd, wd);
		2044	}
		2045
		2046	static void noinline
		2047	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2048	{
		2049	if (slot < 0)
		2050	/* overflow, need to check for all hahs slots */
		2051	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2052	infy_wd (EV_A_ slot, wd, ev);
		2053	else
		2054	{
		2055	WL w_;
		2056
		2057	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2058	{
		2059	ev_stat *w = (ev_stat *)w_;
		2060	w_ = w_->next; /* lets us remove this watcher and all before it */
		2061
		2062	if (w->wd == wd || wd == -1)
		2063	{
		2064	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2065	{
		2066	w->wd = -1;
		2067	infy_add (EV_A_ w); /* re-add, no matter what */
		2068	}
		2069
		2070	stat_timer_cb (EV_A_ &w->timer, 0);
		2071	}
		2072	}
		2073	}
		2074	}
		2075
		2076	static void
		2077	infy_cb (EV_P_ ev_io *w, int revents)
		2078	{
		2079	char buf [EV_INOTIFY_BUFSIZE];
		2080	struct inotify_event *ev = (struct inotify_event *)buf;
		2081	int ofs;
		2082	int len = read (fs_fd, buf, sizeof (buf));
		2083
		2084	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2085	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2086	}
		2087
		2088	void inline_size
		2089	infy_init (EV_P)
		2090	{
		2091	if (fs_fd != -2)
		2092	return;
		2093
		2094	fs_fd = inotify_init ();
		2095
		2096	if (fs_fd >= 0)
		2097	{
		2098	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2099	ev_set_priority (&fs_w, EV_MAXPRI);
		2100	ev_io_start (EV_A_ &fs_w);
		2101	}
		2102	}
		2103
		2104	void inline_size
		2105	infy_fork (EV_P)
		2106	{
		2107	int slot;
		2108
		2109	if (fs_fd < 0)
		2110	return;
		2111
		2112	close (fs_fd);
		2113	fs_fd = inotify_init ();
		2114
		2115	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2116	{
		2117	WL w_ = fs_hash [slot].head;
		2118	fs_hash [slot].head = 0;
		2119
		2120	while (w_)
		2121	{
		2122	ev_stat *w = (ev_stat *)w_;
		2123	w_ = w_->next; /* lets us add this watcher */
		2124
		2125	w->wd = -1;
		2126
		2127	if (fs_fd >= 0)
		2128	infy_add (EV_A_ w); /* re-add, no matter what */
		2129	else
		2130	ev_timer_start (EV_A_ &w->timer);
		2131	}
		2132
		2133	}
		2134	}
		2135
		2136	#endif
		2137
1150	void	2138	void
		2139	ev_stat_stat (EV_P_ ev_stat *w)
		2140	{
		2141	if (lstat (w->path, &w->attr) < 0)
		2142	w->attr.st_nlink = 0;
		2143	else if (!w->attr.st_nlink)
		2144	w->attr.st_nlink = 1;
		2145	}
		2146
		2147	static void noinline
		2148	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2149	{
		2150	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2151
		2152	/* we copy this here each the time so that */
		2153	/* prev has the old value when the callback gets invoked */
		2154	w->prev = w->attr;
		2155	ev_stat_stat (EV_A_ w);
		2156
		2157	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2158	if (
		2159	w->prev.st_dev != w->attr.st_dev
		2160	|| w->prev.st_ino != w->attr.st_ino
		2161	|| w->prev.st_mode != w->attr.st_mode
		2162	|| w->prev.st_nlink != w->attr.st_nlink
		2163	|| w->prev.st_uid != w->attr.st_uid
		2164	|| w->prev.st_gid != w->attr.st_gid
		2165	|| w->prev.st_rdev != w->attr.st_rdev
		2166	|| w->prev.st_size != w->attr.st_size
		2167	|| w->prev.st_atime != w->attr.st_atime
		2168	|| w->prev.st_mtime != w->attr.st_mtime
		2169	|| w->prev.st_ctime != w->attr.st_ctime
		2170	) {
		2171	#if EV_USE_INOTIFY
		2172	infy_del (EV_A_ w);
		2173	infy_add (EV_A_ w);
		2174	ev_stat_stat (EV_A_ w); /* avoid race... */
		2175	#endif
		2176
		2177	ev_feed_event (EV_A_ w, EV_STAT);
		2178	}
		2179	}
		2180
		2181	void
		2182	ev_stat_start (EV_P_ ev_stat *w)
		2183	{
		2184	if (expect_false (ev_is_active (w)))
		2185	return;
		2186
		2187	/* since we use memcmp, we need to clear any padding data etc. */
		2188	memset (&w->prev, 0, sizeof (ev_statdata));
		2189	memset (&w->attr, 0, sizeof (ev_statdata));
		2190
		2191	ev_stat_stat (EV_A_ w);
		2192
		2193	if (w->interval < MIN_STAT_INTERVAL)
		2194	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2195
		2196	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2197	ev_set_priority (&w->timer, ev_priority (w));
		2198
		2199	#if EV_USE_INOTIFY
		2200	infy_init (EV_A);
		2201
		2202	if (fs_fd >= 0)
		2203	infy_add (EV_A_ w);
		2204	else
		2205	#endif
		2206	ev_timer_start (EV_A_ &w->timer);
		2207
		2208	ev_start (EV_A_ (W)w, 1);
		2209	}
		2210
		2211	void
		2212	ev_stat_stop (EV_P_ ev_stat *w)
		2213	{
		2214	clear_pending (EV_A_ (W)w);
		2215	if (expect_false (!ev_is_active (w)))
		2216	return;
		2217
		2218	#if EV_USE_INOTIFY
		2219	infy_del (EV_A_ w);
		2220	#endif
		2221	ev_timer_stop (EV_A_ &w->timer);
		2222
		2223	ev_stop (EV_A_ (W)w);
		2224	}
		2225	#endif
		2226
		2227	#if EV_IDLE_ENABLE
		2228	void
		2229	ev_idle_start (EV_P_ ev_idle *w)
		2230	{
		2231	if (expect_false (ev_is_active (w)))
		2232	return;
		2233
		2234	pri_adjust (EV_A_ (W)w);
		2235
		2236	{
		2237	int active = ++idlecnt [ABSPRI (w)];
		2238
		2239	++idleall;
		2240	ev_start (EV_A_ (W)w, active);
		2241
		2242	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2243	idles [ABSPRI (w)][active - 1] = w;
		2244	}
		2245	}
		2246
		2247	void
		2248	ev_idle_stop (EV_P_ ev_idle *w)
		2249	{
		2250	clear_pending (EV_A_ (W)w);
		2251	if (expect_false (!ev_is_active (w)))
		2252	return;
		2253
		2254	{
		2255	int active = ((W)w)->active;
		2256
		2257	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2258	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2259
		2260	ev_stop (EV_A_ (W)w);
		2261	--idleall;
		2262	}
		2263	}
		2264	#endif
		2265
		2266	void
1151	ev_prepare_start (EV_P_ struct ev_prepare *w)	2267	ev_prepare_start (EV_P_ ev_prepare *w)
1152	{	2268	{
1153	if (ev_is_active (w))	2269	if (expect_false (ev_is_active (w)))
1154	return;	2270	return;
1155		2271
1156	ev_start (EV_A_ (W)w, ++preparecnt);	2272	ev_start (EV_A_ (W)w, ++preparecnt);
1157	array_needsize (prepares, preparemax, preparecnt, );	2273	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1158	prepares [preparecnt - 1] = w;	2274	prepares [preparecnt - 1] = w;
1159	}	2275	}
1160		2276
1161	void	2277	void
1162	ev_prepare_stop (EV_P_ struct ev_prepare *w)	2278	ev_prepare_stop (EV_P_ ev_prepare *w)
1163	{	2279	{
1164	ev_clear_pending (EV_A_ (W)w);	2280	clear_pending (EV_A_ (W)w);
1165	if (ev_is_active (w))	2281	if (expect_false (!ev_is_active (w)))
1166	return;	2282	return;
1167		2283
		2284	{
		2285	int active = ((W)w)->active;
1168	prepares [w->active - 1] = prepares [--preparecnt];	2286	prepares [active - 1] = prepares [--preparecnt];
		2287	((W)prepares [active - 1])->active = active;
		2288	}
		2289
1169	ev_stop (EV_A_ (W)w);	2290	ev_stop (EV_A_ (W)w);
1170	}	2291	}
1171		2292
1172	void	2293	void
1173	ev_check_start (EV_P_ struct ev_check *w)	2294	ev_check_start (EV_P_ ev_check *w)
1174	{	2295	{
1175	if (ev_is_active (w))	2296	if (expect_false (ev_is_active (w)))
1176	return;	2297	return;
1177		2298
1178	ev_start (EV_A_ (W)w, ++checkcnt);	2299	ev_start (EV_A_ (W)w, ++checkcnt);
1179	array_needsize (checks, checkmax, checkcnt, );	2300	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1180	checks [checkcnt - 1] = w;	2301	checks [checkcnt - 1] = w;
1181	}	2302	}
1182		2303
1183	void	2304	void
1184	ev_check_stop (EV_P_ struct ev_check *w)	2305	ev_check_stop (EV_P_ ev_check *w)
1185	{	2306	{
1186	ev_clear_pending (EV_A_ (W)w);	2307	clear_pending (EV_A_ (W)w);
1187	if (ev_is_active (w))	2308	if (expect_false (!ev_is_active (w)))
1188	return;	2309	return;
1189		2310
		2311	{
		2312	int active = ((W)w)->active;
1190	checks [w->active - 1] = checks [--checkcnt];	2313	checks [active - 1] = checks [--checkcnt];
		2314	((W)checks [active - 1])->active = active;
		2315	}
		2316
1191	ev_stop (EV_A_ (W)w);	2317	ev_stop (EV_A_ (W)w);
1192	}	2318	}
1193		2319
1194	void	2320	#if EV_EMBED_ENABLE
1195	ev_child_start (EV_P_ struct ev_child *w)	2321	void noinline
		2322	ev_embed_sweep (EV_P_ ev_embed *w)
1196	{	2323	{
		2324	ev_loop (w->other, EVLOOP_NONBLOCK);
		2325	}
		2326
		2327	static void
		2328	embed_io_cb (EV_P_ ev_io *io, int revents)
		2329	{
		2330	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2331
1197	if (ev_is_active (w))	2332	if (ev_cb (w))
		2333	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2334	else
		2335	ev_loop (w->other, EVLOOP_NONBLOCK);
		2336	}
		2337
		2338	static void
		2339	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2340	{
		2341	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2342
		2343	{
		2344	struct ev_loop *loop = w->other;
		2345
		2346	while (fdchangecnt)
		2347	{
		2348	fd_reify (EV_A);
		2349	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2350	}
		2351	}
		2352	}
		2353
		2354	#if 0
		2355	static void
		2356	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2357	{
		2358	ev_idle_stop (EV_A_ idle);
		2359	}
		2360	#endif
		2361
		2362	void
		2363	ev_embed_start (EV_P_ ev_embed *w)
		2364	{
		2365	if (expect_false (ev_is_active (w)))
1198	return;	2366	return;
		2367
		2368	{
		2369	struct ev_loop *loop = w->other;
		2370	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2371	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2372	}
		2373
		2374	ev_set_priority (&w->io, ev_priority (w));
		2375	ev_io_start (EV_A_ &w->io);
		2376
		2377	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2378	ev_set_priority (&w->prepare, EV_MINPRI);
		2379	ev_prepare_start (EV_A_ &w->prepare);
		2380
		2381	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
1199		2382
1200	ev_start (EV_A_ (W)w, 1);	2383	ev_start (EV_A_ (W)w, 1);
1201	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1202	}	2384	}
1203		2385
1204	void	2386	void
1205	ev_child_stop (EV_P_ struct ev_child *w)	2387	ev_embed_stop (EV_P_ ev_embed *w)
1206	{	2388	{
1207	ev_clear_pending (EV_A_ (W)w);	2389	clear_pending (EV_A_ (W)w);
1208	if (ev_is_active (w))	2390	if (expect_false (!ev_is_active (w)))
1209	return;	2391	return;
1210		2392
1211	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2393	ev_io_stop (EV_A_ &w->io);
		2394	ev_prepare_stop (EV_A_ &w->prepare);
		2395
1212	ev_stop (EV_A_ (W)w);	2396	ev_stop (EV_A_ (W)w);
1213	}	2397	}
		2398	#endif
		2399
		2400	#if EV_FORK_ENABLE
		2401	void
		2402	ev_fork_start (EV_P_ ev_fork *w)
		2403	{
		2404	if (expect_false (ev_is_active (w)))
		2405	return;
		2406
		2407	ev_start (EV_A_ (W)w, ++forkcnt);
		2408	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2409	forks [forkcnt - 1] = w;
		2410	}
		2411
		2412	void
		2413	ev_fork_stop (EV_P_ ev_fork *w)
		2414	{
		2415	clear_pending (EV_A_ (W)w);
		2416	if (expect_false (!ev_is_active (w)))
		2417	return;
		2418
		2419	{
		2420	int active = ((W)w)->active;
		2421	forks [active - 1] = forks [--forkcnt];
		2422	((W)forks [active - 1])->active = active;
		2423	}
		2424
		2425	ev_stop (EV_A_ (W)w);
		2426	}
		2427	#endif
		2428
		2429	#if EV_ASYNC_ENABLE
		2430	void
		2431	ev_async_start (EV_P_ ev_async *w)
		2432	{
		2433	if (expect_false (ev_is_active (w)))
		2434	return;
		2435
		2436	evpipe_init (EV_A);
		2437
		2438	ev_start (EV_A_ (W)w, ++asynccnt);
		2439	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2440	asyncs [asynccnt - 1] = w;
		2441	}
		2442
		2443	void
		2444	ev_async_stop (EV_P_ ev_async *w)
		2445	{
		2446	clear_pending (EV_A_ (W)w);
		2447	if (expect_false (!ev_is_active (w)))
		2448	return;
		2449
		2450	{
		2451	int active = ((W)w)->active;
		2452	asyncs [active - 1] = asyncs [--asynccnt];
		2453	((W)asyncs [active - 1])->active = active;
		2454	}
		2455
		2456	ev_stop (EV_A_ (W)w);
		2457	}
		2458
		2459	void
		2460	ev_async_send (EV_P_ ev_async *w)
		2461	{
		2462	w->sent = 1;
		2463	evpipe_write (EV_A_ 0, 1);
		2464	}
		2465	#endif
1214		2466
1215	/*****************************************************************************/	2467	/*****************************************************************************/
1216		2468
1217	struct ev_once	2469	struct ev_once
1218	{	2470	{
1219	struct ev_io io;	2471	ev_io io;
1220	struct ev_timer to;	2472	ev_timer to;
1221	void (*cb)(int revents, void *arg);	2473	void (*cb)(int revents, void *arg);
1222	void *arg;	2474	void *arg;
1223	};	2475	};
1224		2476
1225	static void	2477	static void
…		…
1228	void (*cb)(int revents, void *arg) = once->cb;	2480	void (*cb)(int revents, void *arg) = once->cb;
1229	void *arg = once->arg;	2481	void *arg = once->arg;
1230		2482
1231	ev_io_stop (EV_A_ &once->io);	2483	ev_io_stop (EV_A_ &once->io);
1232	ev_timer_stop (EV_A_ &once->to);	2484	ev_timer_stop (EV_A_ &once->to);
1233	free (once);	2485	ev_free (once);
1234		2486
1235	cb (revents, arg);	2487	cb (revents, arg);
1236	}	2488	}
1237		2489
1238	static void	2490	static void
1239	once_cb_io (EV_P_ struct ev_io *w, int revents)	2491	once_cb_io (EV_P_ ev_io *w, int revents)
1240	{	2492	{
1241	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2493	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1242	}	2494	}
1243		2495
1244	static void	2496	static void
1245	once_cb_to (EV_P_ struct ev_timer *w, int revents)	2497	once_cb_to (EV_P_ ev_timer *w, int revents)
1246	{	2498	{
1247	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2499	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1248	}	2500	}
1249		2501
1250	void	2502	void
1251	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2503	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1252	{	2504	{
1253	struct ev_once *once = malloc (sizeof (struct ev_once));	2505	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1254		2506
1255	if (!once)	2507	if (expect_false (!once))
		2508	{
1256	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	2509	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1257	else	2510	return;
1258	{	2511	}
		2512
1259	once->cb = cb;	2513	once->cb = cb;
1260	once->arg = arg;	2514	once->arg = arg;
1261		2515
1262	ev_watcher_init (&once->io, once_cb_io);	2516	ev_init (&once->io, once_cb_io);
1263	if (fd >= 0)	2517	if (fd >= 0)
1264	{	2518	{
1265	ev_io_set (&once->io, fd, events);	2519	ev_io_set (&once->io, fd, events);
1266	ev_io_start (EV_A_ &once->io);	2520	ev_io_start (EV_A_ &once->io);
1267	}	2521	}
1268		2522
1269	ev_watcher_init (&once->to, once_cb_to);	2523	ev_init (&once->to, once_cb_to);
1270	if (timeout >= 0.)	2524	if (timeout >= 0.)
1271	{	2525	{
1272	ev_timer_set (&once->to, timeout, 0.);	2526	ev_timer_set (&once->to, timeout, 0.);
1273	ev_timer_start (EV_A_ &once->to);	2527	ev_timer_start (EV_A_ &once->to);
1274	}
1275	}
1276	}
1277
1278	/*****************************************************************************/
1279
1280	#if 0
1281
1282	struct ev_io wio;
1283
1284	static void
1285	sin_cb (struct ev_io *w, int revents)
1286	{
1287	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1288	}
1289
1290	static void
1291	ocb (struct ev_timer *w, int revents)
1292	{
1293	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1294	ev_timer_stop (w);
1295	ev_timer_start (w);
1296	}
1297
1298	static void
1299	scb (struct ev_signal *w, int revents)
1300	{
1301	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1302	ev_io_stop (&wio);
1303	ev_io_start (&wio);
1304	}
1305
1306	static void
1307	gcb (struct ev_signal *w, int revents)
1308	{
1309	fprintf (stderr, "generic %x\n", revents);
1310
1311	}
1312
1313	int main (void)
1314	{
1315	ev_init (0);
1316
1317	ev_io_init (&wio, sin_cb, 0, EV_READ);
1318	ev_io_start (&wio);
1319
1320	struct ev_timer t[10000];
1321
1322	#if 0
1323	int i;
1324	for (i = 0; i < 10000; ++i)
1325	{	2528	}
1326	struct ev_timer *w = t + i;
1327	ev_watcher_init (w, ocb, i);
1328	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1329	ev_timer_start (w);
1330	if (drand48 () < 0.5)
1331	ev_timer_stop (w);
1332	}
1333	#endif
1334
1335	struct ev_timer t1;
1336	ev_timer_init (&t1, ocb, 5, 10);
1337	ev_timer_start (&t1);
1338
1339	struct ev_signal sig;
1340	ev_signal_init (&sig, scb, SIGQUIT);
1341	ev_signal_start (&sig);
1342
1343	struct ev_check cw;
1344	ev_check_init (&cw, gcb);
1345	ev_check_start (&cw);
1346
1347	struct ev_idle iw;
1348	ev_idle_init (&iw, gcb);
1349	ev_idle_start (&iw);
1350
1351	ev_loop (0);
1352
1353	return 0;
1354	}	2529	}
1355		2530
		2531	#if EV_MULTIPLICITY
		2532	#include "ev_wrap.h"
1356	#endif	2533	#endif
1357		2534
		2535	#ifdef __cplusplus
		2536	}
		2537	#endif
1358		2538
1359
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