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Comparing libev/ev.c (file contents):
Revision 1.125 by root, Sat Nov 17 02:28:43 2007 UTC vs.
Revision 1.263 by root, Wed Oct 1 18:50:03 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	*/
31		39
32	#ifdef __cplusplus	40	#ifdef __cplusplus
33	extern "C" {	41	extern "C" {
34	#endif	42	#endif
35		43
		44	/* this big block deduces configuration from config.h */
36	#ifndef EV_STANDALONE	45	#ifndef EV_STANDALONE
		46	# ifdef EV_CONFIG_H
		47	# include EV_CONFIG_H
		48	# else
37	# include "config.h"	49	# include "config.h"
		50	# endif
38		51
39	# if HAVE_CLOCK_GETTIME	52	# if HAVE_CLOCK_GETTIME
40	# ifndef EV_USE_MONOTONIC	53	# ifndef EV_USE_MONOTONIC
41	# define EV_USE_MONOTONIC 1	54	# define EV_USE_MONOTONIC 1
42	# endif	55	# endif
43	# ifndef EV_USE_REALTIME	56	# ifndef EV_USE_REALTIME
44	# define EV_USE_REALTIME 1	57	# define EV_USE_REALTIME 1
45	# endif	58	# endif
		59	# else
		60	# ifndef EV_USE_MONOTONIC
		61	# define EV_USE_MONOTONIC 0
		62	# endif
		63	# ifndef EV_USE_REALTIME
		64	# define EV_USE_REALTIME 0
		65	# endif
46	# endif	66	# endif
47		67
48	# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT)	68	# ifndef EV_USE_NANOSLEEP
		69	# if HAVE_NANOSLEEP
49	# define EV_USE_SELECT 1	70	# define EV_USE_NANOSLEEP 1
		71	# else
		72	# define EV_USE_NANOSLEEP 0
		73	# endif
50	# endif	74	# endif
51		75
52	# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL)	76	# ifndef EV_USE_SELECT
		77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
53	# define EV_USE_POLL 1	78	# define EV_USE_SELECT 1
		79	# else
		80	# define EV_USE_SELECT 0
		81	# endif
54	# endif	82	# endif
55		83
56	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL)	84	# ifndef EV_USE_POLL
		85	# if HAVE_POLL && HAVE_POLL_H
57	# define EV_USE_EPOLL 1	86	# define EV_USE_POLL 1
		87	# else
		88	# define EV_USE_POLL 0
		89	# endif
58	# endif	90	# endif
59		91
60	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE)	92	# ifndef EV_USE_EPOLL
		93	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
61	# define EV_USE_KQUEUE 1	94	# define EV_USE_EPOLL 1
		95	# else
		96	# define EV_USE_EPOLL 0
		97	# endif
62	# endif	98	# endif
63		99
64	# if HAVE_PORT_H && HAVE_PORT_CREATE && !defined (EV_USE_PORT)	100	# ifndef EV_USE_KQUEUE
		101	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
65	# define EV_USE_PORT 1	102	# define EV_USE_KQUEUE 1
		103	# else
		104	# define EV_USE_KQUEUE 0
		105	# endif
66	# endif	106	# endif
		107
		108	# ifndef EV_USE_PORT
		109	# if HAVE_PORT_H && HAVE_PORT_CREATE
		110	# define EV_USE_PORT 1
		111	# else
		112	# define EV_USE_PORT 0
		113	# endif
		114	# endif
67		115
		116	# ifndef EV_USE_INOTIFY
		117	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		118	# define EV_USE_INOTIFY 1
		119	# else
		120	# define EV_USE_INOTIFY 0
		121	# endif
		122	# endif
		123
		124	# ifndef EV_USE_EVENTFD
		125	# if HAVE_EVENTFD
		126	# define EV_USE_EVENTFD 1
		127	# else
		128	# define EV_USE_EVENTFD 0
		129	# endif
		130	# endif
		131
68	#endif	132	#endif
69		133
70	#include <math.h>	134	#include <math.h>
71	#include <stdlib.h>	135	#include <stdlib.h>
72	#include <fcntl.h>	136	#include <fcntl.h>
…		…
79	#include <sys/types.h>	143	#include <sys/types.h>
80	#include <time.h>	144	#include <time.h>
81		145
82	#include <signal.h>	146	#include <signal.h>
83		147
		148	#ifdef EV_H
		149	# include EV_H
		150	#else
		151	# include "ev.h"
		152	#endif
		153
84	#ifndef _WIN32	154	#ifndef _WIN32
85	# include <unistd.h>
86	# include <sys/time.h>	155	# include <sys/time.h>
87	# include <sys/wait.h>	156	# include <sys/wait.h>
		157	# include <unistd.h>
88	#else	158	#else
		159	# include <io.h>
89	# define WIN32_LEAN_AND_MEAN	160	# define WIN32_LEAN_AND_MEAN
90	# include <windows.h>	161	# include <windows.h>
91	# ifndef EV_SELECT_IS_WINSOCKET	162	# ifndef EV_SELECT_IS_WINSOCKET
92	# define EV_SELECT_IS_WINSOCKET 1	163	# define EV_SELECT_IS_WINSOCKET 1
93	# endif	164	# endif
94	#endif	165	#endif
95		166
96	/**/	167	/* this block tries to deduce configuration from header-defined symbols and defaults */
97		168
98	#ifndef EV_USE_MONOTONIC	169	#ifndef EV_USE_MONOTONIC
		170	# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
		171	# define EV_USE_MONOTONIC 1
		172	# else
99	# define EV_USE_MONOTONIC 0	173	# define EV_USE_MONOTONIC 0
		174	# endif
100	#endif	175	#endif
101		176
102	#ifndef EV_USE_REALTIME	177	#ifndef EV_USE_REALTIME
103	# define EV_USE_REALTIME 0	178	# define EV_USE_REALTIME 0
		179	#endif
		180
		181	#ifndef EV_USE_NANOSLEEP
		182	# if _POSIX_C_SOURCE >= 199309L
		183	# define EV_USE_NANOSLEEP 1
		184	# else
		185	# define EV_USE_NANOSLEEP 0
		186	# endif
104	#endif	187	#endif
105		188
106	#ifndef EV_USE_SELECT	189	#ifndef EV_USE_SELECT
107	# define EV_USE_SELECT 1	190	# define EV_USE_SELECT 1
108	#endif	191	#endif
…		…
114	# define EV_USE_POLL 1	197	# define EV_USE_POLL 1
115	# endif	198	# endif
116	#endif	199	#endif
117		200
118	#ifndef EV_USE_EPOLL	201	#ifndef EV_USE_EPOLL
		202	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		203	# define EV_USE_EPOLL 1
		204	# else
119	# define EV_USE_EPOLL 0	205	# define EV_USE_EPOLL 0
		206	# endif
120	#endif	207	#endif
121		208
122	#ifndef EV_USE_KQUEUE	209	#ifndef EV_USE_KQUEUE
123	# define EV_USE_KQUEUE 0	210	# define EV_USE_KQUEUE 0
124	#endif	211	#endif
125		212
126	#ifndef EV_USE_PORT	213	#ifndef EV_USE_PORT
127	# define EV_USE_PORT 0	214	# define EV_USE_PORT 0
128	#endif	215	#endif
129		216
130	/**/	217	#ifndef EV_USE_INOTIFY
131		218	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
132	/* darwin simply cannot be helped */	219	# define EV_USE_INOTIFY 1
133	#ifdef __APPLE__	220	# else
134	# undef EV_USE_POLL	221	# define EV_USE_INOTIFY 0
135	# undef EV_USE_KQUEUE
136	#endif	222	# endif
		223	#endif
		224
		225	#ifndef EV_PID_HASHSIZE
		226	# if EV_MINIMAL
		227	# define EV_PID_HASHSIZE 1
		228	# else
		229	# define EV_PID_HASHSIZE 16
		230	# endif
		231	#endif
		232
		233	#ifndef EV_INOTIFY_HASHSIZE
		234	# if EV_MINIMAL
		235	# define EV_INOTIFY_HASHSIZE 1
		236	# else
		237	# define EV_INOTIFY_HASHSIZE 16
		238	# endif
		239	#endif
		240
		241	#ifndef EV_USE_EVENTFD
		242	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		243	# define EV_USE_EVENTFD 1
		244	# else
		245	# define EV_USE_EVENTFD 0
		246	# endif
		247	#endif
		248
		249	#if 0 /* debugging */
		250	# define EV_VERIFY 3
		251	# define EV_USE_4HEAP 1
		252	# define EV_HEAP_CACHE_AT 1
		253	#endif
		254
		255	#ifndef EV_VERIFY
		256	# define EV_VERIFY !EV_MINIMAL
		257	#endif
		258
		259	#ifndef EV_USE_4HEAP
		260	# define EV_USE_4HEAP !EV_MINIMAL
		261	#endif
		262
		263	#ifndef EV_HEAP_CACHE_AT
		264	# define EV_HEAP_CACHE_AT !EV_MINIMAL
		265	#endif
		266
		267	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
137		268
138	#ifndef CLOCK_MONOTONIC	269	#ifndef CLOCK_MONOTONIC
139	# undef EV_USE_MONOTONIC	270	# undef EV_USE_MONOTONIC
140	# define EV_USE_MONOTONIC 0	271	# define EV_USE_MONOTONIC 0
141	#endif	272	#endif
…		…
143	#ifndef CLOCK_REALTIME	274	#ifndef CLOCK_REALTIME
144	# undef EV_USE_REALTIME	275	# undef EV_USE_REALTIME
145	# define EV_USE_REALTIME 0	276	# define EV_USE_REALTIME 0
146	#endif	277	#endif
147		278
		279	#if !EV_STAT_ENABLE
		280	# undef EV_USE_INOTIFY
		281	# define EV_USE_INOTIFY 0
		282	#endif
		283
		284	#if !EV_USE_NANOSLEEP
		285	# ifndef _WIN32
		286	# include <sys/select.h>
		287	# endif
		288	#endif
		289
		290	#if EV_USE_INOTIFY
		291	# include <sys/inotify.h>
		292	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
		293	# ifndef IN_DONT_FOLLOW
		294	# undef EV_USE_INOTIFY
		295	# define EV_USE_INOTIFY 0
		296	# endif
		297	#endif
		298
148	#if EV_SELECT_IS_WINSOCKET	299	#if EV_SELECT_IS_WINSOCKET
149	# include <winsock.h>	300	# include <winsock.h>
150	#endif	301	#endif
151		302
		303	#if EV_USE_EVENTFD
		304	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		305	# include <stdint.h>
		306	# ifdef __cplusplus
		307	extern "C" {
		308	# endif
		309	int eventfd (unsigned int initval, int flags);
		310	# ifdef __cplusplus
		311	}
		312	# endif
		313	#endif
		314
152	/**/	315	/**/
		316
		317	#if EV_VERIFY >= 3
		318	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
		319	#else
		320	# define EV_FREQUENT_CHECK do { } while (0)
		321	#endif
		322
		323	/*
		324	* This is used to avoid floating point rounding problems.
		325	* It is added to ev_rt_now when scheduling periodics
		326	* to ensure progress, time-wise, even when rounding
		327	* errors are against us.
		328	* This value is good at least till the year 4000.
		329	* Better solutions welcome.
		330	*/
		331	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
153		332
154	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	333	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
155	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	334	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
156	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
157	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	335	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
158		336
159	#ifdef EV_H
160	# include EV_H
161	#else
162	# include "ev.h"
163	#endif
164
165	#if __GNUC__ >= 3	337	#if __GNUC__ >= 4
166	# define expect(expr,value) __builtin_expect ((expr),(value))	338	# define expect(expr,value) __builtin_expect ((expr),(value))
167	# define inline static inline	339	# define noinline __attribute__ ((noinline))
168	#else	340	#else
169	# define expect(expr,value) (expr)	341	# define expect(expr,value) (expr)
170	# define inline static	342	# define noinline
		343	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		344	# define inline
		345	# endif
171	#endif	346	#endif
172		347
173	#define expect_false(expr) expect ((expr) != 0, 0)	348	#define expect_false(expr) expect ((expr) != 0, 0)
174	#define expect_true(expr) expect ((expr) != 0, 1)	349	#define expect_true(expr) expect ((expr) != 0, 1)
		350	#define inline_size static inline
		351
		352	#if EV_MINIMAL
		353	# define inline_speed static noinline
		354	#else
		355	# define inline_speed static inline
		356	#endif
175		357
176	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	358	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
177	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	359	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
178		360
179	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */	361	#define EMPTY /* required for microsofts broken pseudo-c compiler */
180	#define EMPTY2(a,b) /* used to suppress some warnings */	362	#define EMPTY2(a,b) /* used to suppress some warnings */
181		363
182	typedef struct ev_watcher *W;	364	typedef ev_watcher *W;
183	typedef struct ev_watcher_list *WL;	365	typedef ev_watcher_list *WL;
184	typedef struct ev_watcher_time *WT;	366	typedef ev_watcher_time *WT;
185		367
		368	#define ev_active(w) ((W)(w))->active
		369	#define ev_at(w) ((WT)(w))->at
		370
		371	#if EV_USE_MONOTONIC
		372	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		373	/* giving it a reasonably high chance of working on typical architetcures */
186	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	374	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		375	#endif
187		376
188	#ifdef _WIN32	377	#ifdef _WIN32
189	# include "ev_win32.c"	378	# include "ev_win32.c"
190	#endif	379	#endif
191		380
192	/*****************************************************************************/	381	/*****************************************************************************/
193		382
194	static void (*syserr_cb)(const char *msg);	383	static void (*syserr_cb)(const char *msg);
195		384
		385	void
196	void ev_set_syserr_cb (void (*cb)(const char *msg))	386	ev_set_syserr_cb (void (*cb)(const char *msg))
197	{	387	{
198	syserr_cb = cb;	388	syserr_cb = cb;
199	}	389	}
200		390
201	static void	391	static void noinline
202	syserr (const char *msg)	392	syserr (const char *msg)
203	{	393	{
204	if (!msg)	394	if (!msg)
205	msg = "(libev) system error";	395	msg = "(libev) system error";
206		396
…		…
211	perror (msg);	401	perror (msg);
212	abort ();	402	abort ();
213	}	403	}
214	}	404	}
215		405
		406	static void *
		407	ev_realloc_emul (void *ptr, long size)
		408	{
		409	/* some systems, notably openbsd and darwin, fail to properly
		410	* implement realloc (x, 0) (as required by both ansi c-98 and
		411	* the single unix specification, so work around them here.
		412	*/
		413
		414	if (size)
		415	return realloc (ptr, size);
		416
		417	free (ptr);
		418	return 0;
		419	}
		420
216	static void *(*alloc)(void *ptr, long size);	421	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
217		422
		423	void
218	void ev_set_allocator (void *(*cb)(void *ptr, long size))	424	ev_set_allocator (void *(*cb)(void *ptr, long size))
219	{	425	{
220	alloc = cb;	426	alloc = cb;
221	}	427	}
222		428
223	static void *	429	inline_speed void *
224	ev_realloc (void *ptr, long size)	430	ev_realloc (void *ptr, long size)
225	{	431	{
226	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	432	ptr = alloc (ptr, size);
227		433
228	if (!ptr && size)	434	if (!ptr && size)
229	{	435	{
230	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	436	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
231	abort ();	437	abort ();
…		…
252	typedef struct	458	typedef struct
253	{	459	{
254	W w;	460	W w;
255	int events;	461	int events;
256	} ANPENDING;	462	} ANPENDING;
		463
		464	#if EV_USE_INOTIFY
		465	/* hash table entry per inotify-id */
		466	typedef struct
		467	{
		468	WL head;
		469	} ANFS;
		470	#endif
		471
		472	/* Heap Entry */
		473	#if EV_HEAP_CACHE_AT
		474	typedef struct {
		475	ev_tstamp at;
		476	WT w;
		477	} ANHE;
		478
		479	#define ANHE_w(he) (he).w /* access watcher, read-write */
		480	#define ANHE_at(he) (he).at /* access cached at, read-only */
		481	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
		482	#else
		483	typedef WT ANHE;
		484
		485	#define ANHE_w(he) (he)
		486	#define ANHE_at(he) (he)->at
		487	#define ANHE_at_cache(he)
		488	#endif
257		489
258	#if EV_MULTIPLICITY	490	#if EV_MULTIPLICITY
259		491
260	struct ev_loop	492	struct ev_loop
261	{	493	{
…		…
295	gettimeofday (&tv, 0);	527	gettimeofday (&tv, 0);
296	return tv.tv_sec + tv.tv_usec * 1e-6;	528	return tv.tv_sec + tv.tv_usec * 1e-6;
297	#endif	529	#endif
298	}	530	}
299		531
300	inline ev_tstamp	532	ev_tstamp inline_size
301	get_clock (void)	533	get_clock (void)
302	{	534	{
303	#if EV_USE_MONOTONIC	535	#if EV_USE_MONOTONIC
304	if (expect_true (have_monotonic))	536	if (expect_true (have_monotonic))
305	{	537	{
…		…
318	{	550	{
319	return ev_rt_now;	551	return ev_rt_now;
320	}	552	}
321	#endif	553	#endif
322		554
323	#define array_roundsize(type,n) (((n) | 4) & ~3)	555	void
		556	ev_sleep (ev_tstamp delay)
		557	{
		558	if (delay > 0.)
		559	{
		560	#if EV_USE_NANOSLEEP
		561	struct timespec ts;
		562
		563	ts.tv_sec = (time_t)delay;
		564	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		565
		566	nanosleep (&ts, 0);
		567	#elif defined(_WIN32)
		568	Sleep ((unsigned long)(delay * 1e3));
		569	#else
		570	struct timeval tv;
		571
		572	tv.tv_sec = (time_t)delay;
		573	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		574
		575	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
		576	/* somehting nto guaranteed by newer posix versions, but guaranteed */
		577	/* by older ones */
		578	select (0, 0, 0, 0, &tv);
		579	#endif
		580	}
		581	}
		582
		583	/*****************************************************************************/
		584
		585	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		586
		587	int inline_size
		588	array_nextsize (int elem, int cur, int cnt)
		589	{
		590	int ncur = cur + 1;
		591
		592	do
		593	ncur <<= 1;
		594	while (cnt > ncur);
		595
		596	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		597	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
		598	{
		599	ncur *= elem;
		600	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
		601	ncur = ncur - sizeof (void *) * 4;
		602	ncur /= elem;
		603	}
		604
		605	return ncur;
		606	}
		607
		608	static noinline void *
		609	array_realloc (int elem, void *base, int *cur, int cnt)
		610	{
		611	*cur = array_nextsize (elem, *cur, cnt);
		612	return ev_realloc (base, elem * *cur);
		613	}
324		614
325	#define array_needsize(type,base,cur,cnt,init) \	615	#define array_needsize(type,base,cur,cnt,init) \
326	if (expect_false ((cnt) > cur)) \	616	if (expect_false ((cnt) > (cur))) \
327	{ \	617	{ \
328	int newcnt = cur; \	618	int ocur_ = (cur); \
329	do \	619	(base) = (type *)array_realloc \
330	{ \	620	(sizeof (type), (base), &(cur), (cnt)); \
331	newcnt = array_roundsize (type, newcnt << 1); \	621	init ((base) + (ocur_), (cur) - ocur_); \
332	} \
333	while ((cnt) > newcnt); \
334	\
335	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
336	init (base + cur, newcnt - cur); \
337	cur = newcnt; \
338	}	622	}
339		623
		624	#if 0
340	#define array_slim(type,stem) \	625	#define array_slim(type,stem) \
341	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \	626	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
342	{ \	627	{ \
343	stem ## max = array_roundsize (stem ## cnt >> 1); \	628	stem ## max = array_roundsize (stem ## cnt >> 1); \
344	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\	629	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
345	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	630	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
346	}	631	}
		632	#endif
347		633
348	#define array_free(stem, idx) \	634	#define array_free(stem, idx) \
349	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	635	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
350		636
351	/*****************************************************************************/	637	/*****************************************************************************/
352		638
353	static void	639	void noinline
		640	ev_feed_event (EV_P_ void *w, int revents)
		641	{
		642	W w_ = (W)w;
		643	int pri = ABSPRI (w_);
		644
		645	if (expect_false (w_->pending))
		646	pendings [pri][w_->pending - 1].events |= revents;
		647	else
		648	{
		649	w_->pending = ++pendingcnt [pri];
		650	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		651	pendings [pri][w_->pending - 1].w = w_;
		652	pendings [pri][w_->pending - 1].events = revents;
		653	}
		654	}
		655
		656	void inline_speed
		657	queue_events (EV_P_ W *events, int eventcnt, int type)
		658	{
		659	int i;
		660
		661	for (i = 0; i < eventcnt; ++i)
		662	ev_feed_event (EV_A_ events [i], type);
		663	}
		664
		665	/*****************************************************************************/
		666
		667	void inline_size
354	anfds_init (ANFD *base, int count)	668	anfds_init (ANFD *base, int count)
355	{	669	{
356	while (count--)	670	while (count--)
357	{	671	{
358	base->head = 0;	672	base->head = 0;
…		…
361		675
362	++base;	676	++base;
363	}	677	}
364	}	678	}
365		679
366	void	680	void inline_speed
367	ev_feed_event (EV_P_ void *w, int revents)
368	{
369	W w_ = (W)w;
370
371	if (expect_false (w_->pending))
372	{
373	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
374	return;
375	}
376
377	w_->pending = ++pendingcnt [ABSPRI (w_)];
378	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
379	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
380	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
381	}
382
383	static void
384	queue_events (EV_P_ W *events, int eventcnt, int type)
385	{
386	int i;
387
388	for (i = 0; i < eventcnt; ++i)
389	ev_feed_event (EV_A_ events [i], type);
390	}
391
392	inline void
393	fd_event (EV_P_ int fd, int revents)	681	fd_event (EV_P_ int fd, int revents)
394	{	682	{
395	ANFD *anfd = anfds + fd;	683	ANFD *anfd = anfds + fd;
396	struct ev_io *w;	684	ev_io *w;
397		685
398	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	686	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
399	{	687	{
400	int ev = w->events & revents;	688	int ev = w->events & revents;
401		689
402	if (ev)	690	if (ev)
403	ev_feed_event (EV_A_ (W)w, ev);	691	ev_feed_event (EV_A_ (W)w, ev);
…		…
405	}	693	}
406		694
407	void	695	void
408	ev_feed_fd_event (EV_P_ int fd, int revents)	696	ev_feed_fd_event (EV_P_ int fd, int revents)
409	{	697	{
		698	if (fd >= 0 && fd < anfdmax)
410	fd_event (EV_A_ fd, revents);	699	fd_event (EV_A_ fd, revents);
411	}	700	}
412		701
413	/*****************************************************************************/	702	void inline_size
414
415	inline void
416	fd_reify (EV_P)	703	fd_reify (EV_P)
417	{	704	{
418	int i;	705	int i;
419		706
420	for (i = 0; i < fdchangecnt; ++i)	707	for (i = 0; i < fdchangecnt; ++i)
421	{	708	{
422	int fd = fdchanges [i];	709	int fd = fdchanges [i];
423	ANFD *anfd = anfds + fd;	710	ANFD *anfd = anfds + fd;
424	struct ev_io *w;	711	ev_io *w;
425		712
426	int events = 0;	713	unsigned char events = 0;
427		714
428	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	715	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
429	events |= w->events;	716	events |= (unsigned char)w->events;
430		717
431	#if EV_SELECT_IS_WINSOCKET	718	#if EV_SELECT_IS_WINSOCKET
432	if (events)	719	if (events)
433	{	720	{
434	unsigned long argp;	721	unsigned long arg;
		722	#ifdef EV_FD_TO_WIN32_HANDLE
		723	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		724	#else
435	anfd->handle = _get_osfhandle (fd);	725	anfd->handle = _get_osfhandle (fd);
		726	#endif
436	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));	727	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
437	}	728	}
438	#endif	729	#endif
439		730
		731	{
		732	unsigned char o_events = anfd->events;
		733	unsigned char o_reify = anfd->reify;
		734
440	anfd->reify = 0;	735	anfd->reify = 0;
441
442	method_modify (EV_A_ fd, anfd->events, events);
443	anfd->events = events;	736	anfd->events = events;
		737
		738	if (o_events != events || o_reify & EV_IOFDSET)
		739	backend_modify (EV_A_ fd, o_events, events);
		740	}
444	}	741	}
445		742
446	fdchangecnt = 0;	743	fdchangecnt = 0;
447	}	744	}
448		745
449	static void	746	void inline_size
450	fd_change (EV_P_ int fd)	747	fd_change (EV_P_ int fd, int flags)
451	{	748	{
452	if (expect_false (anfds [fd].reify))	749	unsigned char reify = anfds [fd].reify;
453	return;
454
455	anfds [fd].reify = 1;	750	anfds [fd].reify |= flags;
456		751
		752	if (expect_true (!reify))
		753	{
457	++fdchangecnt;	754	++fdchangecnt;
458	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	755	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
459	fdchanges [fdchangecnt - 1] = fd;	756	fdchanges [fdchangecnt - 1] = fd;
		757	}
460	}	758	}
461		759
462	static void	760	void inline_speed
463	fd_kill (EV_P_ int fd)	761	fd_kill (EV_P_ int fd)
464	{	762	{
465	struct ev_io *w;	763	ev_io *w;
466		764
467	while ((w = (struct ev_io *)anfds [fd].head))	765	while ((w = (ev_io *)anfds [fd].head))
468	{	766	{
469	ev_io_stop (EV_A_ w);	767	ev_io_stop (EV_A_ w);
470	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	768	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
471	}	769	}
472	}	770	}
473		771
474	inline int	772	int inline_size
475	fd_valid (int fd)	773	fd_valid (int fd)
476	{	774	{
477	#ifdef _WIN32	775	#ifdef _WIN32
478	return _get_osfhandle (fd) != -1;	776	return _get_osfhandle (fd) != -1;
479	#else	777	#else
480	return fcntl (fd, F_GETFD) != -1;	778	return fcntl (fd, F_GETFD) != -1;
481	#endif	779	#endif
482	}	780	}
483		781
484	/* called on EBADF to verify fds */	782	/* called on EBADF to verify fds */
485	static void	783	static void noinline
486	fd_ebadf (EV_P)	784	fd_ebadf (EV_P)
487	{	785	{
488	int fd;	786	int fd;
489		787
490	for (fd = 0; fd < anfdmax; ++fd)	788	for (fd = 0; fd < anfdmax; ++fd)
491	if (anfds [fd].events)	789	if (anfds [fd].events)
492	if (!fd_valid (fd) == -1 && errno == EBADF)	790	if (!fd_valid (fd) && errno == EBADF)
493	fd_kill (EV_A_ fd);	791	fd_kill (EV_A_ fd);
494	}	792	}
495		793
496	/* called on ENOMEM in select/poll to kill some fds and retry */	794	/* called on ENOMEM in select/poll to kill some fds and retry */
497	static void	795	static void noinline
498	fd_enomem (EV_P)	796	fd_enomem (EV_P)
499	{	797	{
500	int fd;	798	int fd;
501		799
502	for (fd = anfdmax; fd--; )	800	for (fd = anfdmax; fd--; )
…		…
505	fd_kill (EV_A_ fd);	803	fd_kill (EV_A_ fd);
506	return;	804	return;
507	}	805	}
508	}	806	}
509		807
510	/* usually called after fork if method needs to re-arm all fds from scratch */	808	/* usually called after fork if backend needs to re-arm all fds from scratch */
511	static void	809	static void noinline
512	fd_rearm_all (EV_P)	810	fd_rearm_all (EV_P)
513	{	811	{
514	int fd;	812	int fd;
515		813
516	/* this should be highly optimised to not do anything but set a flag */
517	for (fd = 0; fd < anfdmax; ++fd)	814	for (fd = 0; fd < anfdmax; ++fd)
518	if (anfds [fd].events)	815	if (anfds [fd].events)
519	{	816	{
520	anfds [fd].events = 0;	817	anfds [fd].events = 0;
521	fd_change (EV_A_ fd);	818	fd_change (EV_A_ fd, EV_IOFDSET | 1);
522	}	819	}
523	}	820	}
524		821
525	/*****************************************************************************/	822	/*****************************************************************************/
526		823
527	static void	824	/*
528	upheap (WT *heap, int k)	825	* the heap functions want a real array index. array index 0 uis guaranteed to not
529	{	826	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
530	WT w = heap [k];	827	* the branching factor of the d-tree.
		828	*/
531		829
532	while (k && heap [k >> 1]->at > w->at)	830	/*
533	{	831	* at the moment we allow libev the luxury of two heaps,
534	heap [k] = heap [k >> 1];	832	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
535	((W)heap [k])->active = k + 1;	833	* which is more cache-efficient.
536	k >>= 1;	834	* the difference is about 5% with 50000+ watchers.
537	}	835	*/
		836	#if EV_USE_4HEAP
538		837
539	heap [k] = w;	838	#define DHEAP 4
540	((W)heap [k])->active = k + 1;	839	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		840	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
		841	#define UPHEAP_DONE(p,k) ((p) == (k))
541		842
542	}	843	/* away from the root */
543		844	void inline_speed
544	static void
545	downheap (WT *heap, int N, int k)	845	downheap (ANHE *heap, int N, int k)
546	{	846	{
547	WT w = heap [k];	847	ANHE he = heap [k];
		848	ANHE *E = heap + N + HEAP0;
548		849
549	while (k < (N >> 1))	850	for (;;)
550	{	851	{
551	int j = k << 1;	852	ev_tstamp minat;
		853	ANHE *minpos;
		854	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
552		855
553	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	856	/* find minimum child */
		857	if (expect_true (pos + DHEAP - 1 < E))
554	++j;	858	{
555		859	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
556	if (w->at <= heap [j]->at)	860	if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		861	if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		862	if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		863	}
		864	else if (pos < E)
		865	{
		866	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		867	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		868	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		869	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		870	}
		871	else
557	break;	872	break;
558		873
		874	if (ANHE_at (he) <= minat)
		875	break;
		876
		877	heap [k] = *minpos;
		878	ev_active (ANHE_w (*minpos)) = k;
		879
		880	k = minpos - heap;
		881	}
		882
		883	heap [k] = he;
		884	ev_active (ANHE_w (he)) = k;
		885	}
		886
		887	#else /* 4HEAP */
		888
		889	#define HEAP0 1
		890	#define HPARENT(k) ((k) >> 1)
		891	#define UPHEAP_DONE(p,k) (!(p))
		892
		893	/* away from the root */
		894	void inline_speed
		895	downheap (ANHE *heap, int N, int k)
		896	{
		897	ANHE he = heap [k];
		898
		899	for (;;)
		900	{
		901	int c = k << 1;
		902
		903	if (c > N + HEAP0 - 1)
		904	break;
		905
		906	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		907	? 1 : 0;
		908
		909	if (ANHE_at (he) <= ANHE_at (heap [c]))
		910	break;
		911
559	heap [k] = heap [j];	912	heap [k] = heap [c];
560	((W)heap [k])->active = k + 1;	913	ev_active (ANHE_w (heap [k])) = k;
		914
561	k = j;	915	k = c;
562	}	916	}
563		917
564	heap [k] = w;	918	heap [k] = he;
565	((W)heap [k])->active = k + 1;	919	ev_active (ANHE_w (he)) = k;
566	}	920	}
		921	#endif
567		922
568	inline void	923	/* towards the root */
		924	void inline_speed
		925	upheap (ANHE *heap, int k)
		926	{
		927	ANHE he = heap [k];
		928
		929	for (;;)
		930	{
		931	int p = HPARENT (k);
		932
		933	if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
		934	break;
		935
		936	heap [k] = heap [p];
		937	ev_active (ANHE_w (heap [k])) = k;
		938	k = p;
		939	}
		940
		941	heap [k] = he;
		942	ev_active (ANHE_w (he)) = k;
		943	}
		944
		945	void inline_size
569	adjustheap (WT *heap, int N, int k)	946	adjustheap (ANHE *heap, int N, int k)
570	{	947	{
		948	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
571	upheap (heap, k);	949	upheap (heap, k);
		950	else
572	downheap (heap, N, k);	951	downheap (heap, N, k);
		952	}
		953
		954	/* rebuild the heap: this function is used only once and executed rarely */
		955	void inline_size
		956	reheap (ANHE *heap, int N)
		957	{
		958	int i;
		959
		960	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
		961	/* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
		962	for (i = 0; i < N; ++i)
		963	upheap (heap, i + HEAP0);
573	}	964	}
574		965
575	/*****************************************************************************/	966	/*****************************************************************************/
576		967
577	typedef struct	968	typedef struct
578	{	969	{
579	WL head;	970	WL head;
580	sig_atomic_t volatile gotsig;	971	EV_ATOMIC_T gotsig;
581	} ANSIG;	972	} ANSIG;
582		973
583	static ANSIG *signals;	974	static ANSIG *signals;
584	static int signalmax;	975	static int signalmax;
585		976
586	static int sigpipe [2];	977	static EV_ATOMIC_T gotsig;
587	static sig_atomic_t volatile gotsig;
588	static struct ev_io sigev;
589		978
590	static void	979	void inline_size
591	signals_init (ANSIG *base, int count)	980	signals_init (ANSIG *base, int count)
592	{	981	{
593	while (count--)	982	while (count--)
594	{	983	{
595	base->head = 0;	984	base->head = 0;
…		…
597		986
598	++base;	987	++base;
599	}	988	}
600	}	989	}
601		990
602	static void	991	/*****************************************************************************/
603	sighandler (int signum)
604	{
605	#if _WIN32
606	signal (signum, sighandler);
607	#endif
608		992
609	signals [signum - 1].gotsig = 1;	993	void inline_speed
610
611	if (!gotsig)
612	{
613	int old_errno = errno;
614	gotsig = 1;
615	write (sigpipe [1], &signum, 1);
616	errno = old_errno;
617	}
618	}
619
620	void
621	ev_feed_signal_event (EV_P_ int signum)
622	{
623	WL w;
624
625	#if EV_MULTIPLICITY
626	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
627	#endif
628
629	--signum;
630
631	if (signum < 0 || signum >= signalmax)
632	return;
633
634	signals [signum].gotsig = 0;
635
636	for (w = signals [signum].head; w; w = w->next)
637	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
638	}
639
640	static void
641	sigcb (EV_P_ struct ev_io *iow, int revents)
642	{
643	int signum;
644
645	read (sigpipe [0], &revents, 1);
646	gotsig = 0;
647
648	for (signum = signalmax; signum--; )
649	if (signals [signum].gotsig)
650	ev_feed_signal_event (EV_A_ signum + 1);
651	}
652
653	static void
654	fd_intern (int fd)	994	fd_intern (int fd)
655	{	995	{
656	#ifdef _WIN32	996	#ifdef _WIN32
657	int arg = 1;	997	unsigned long arg = 1;
658	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	998	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
659	#else	999	#else
660	fcntl (fd, F_SETFD, FD_CLOEXEC);	1000	fcntl (fd, F_SETFD, FD_CLOEXEC);
661	fcntl (fd, F_SETFL, O_NONBLOCK);	1001	fcntl (fd, F_SETFL, O_NONBLOCK);
662	#endif	1002	#endif
663	}	1003	}
664		1004
		1005	static void noinline
		1006	evpipe_init (EV_P)
		1007	{
		1008	if (!ev_is_active (&pipeev))
		1009	{
		1010	#if EV_USE_EVENTFD
		1011	if ((evfd = eventfd (0, 0)) >= 0)
		1012	{
		1013	evpipe [0] = -1;
		1014	fd_intern (evfd);
		1015	ev_io_set (&pipeev, evfd, EV_READ);
		1016	}
		1017	else
		1018	#endif
		1019	{
		1020	while (pipe (evpipe))
		1021	syserr ("(libev) error creating signal/async pipe");
		1022
		1023	fd_intern (evpipe [0]);
		1024	fd_intern (evpipe [1]);
		1025	ev_io_set (&pipeev, evpipe [0], EV_READ);
		1026	}
		1027
		1028	ev_io_start (EV_A_ &pipeev);
		1029	ev_unref (EV_A); /* watcher should not keep loop alive */
		1030	}
		1031	}
		1032
		1033	void inline_size
		1034	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1035	{
		1036	if (!*flag)
		1037	{
		1038	int old_errno = errno; /* save errno because write might clobber it */
		1039
		1040	*flag = 1;
		1041
		1042	#if EV_USE_EVENTFD
		1043	if (evfd >= 0)
		1044	{
		1045	uint64_t counter = 1;
		1046	write (evfd, &counter, sizeof (uint64_t));
		1047	}
		1048	else
		1049	#endif
		1050	write (evpipe [1], &old_errno, 1);
		1051
		1052	errno = old_errno;
		1053	}
		1054	}
		1055
665	static void	1056	static void
666	siginit (EV_P)	1057	pipecb (EV_P_ ev_io *iow, int revents)
667	{	1058	{
668	fd_intern (sigpipe [0]);	1059	#if EV_USE_EVENTFD
669	fd_intern (sigpipe [1]);	1060	if (evfd >= 0)
		1061	{
		1062	uint64_t counter;
		1063	read (evfd, &counter, sizeof (uint64_t));
		1064	}
		1065	else
		1066	#endif
		1067	{
		1068	char dummy;
		1069	read (evpipe [0], &dummy, 1);
		1070	}
670		1071
671	ev_io_set (&sigev, sigpipe [0], EV_READ);	1072	if (gotsig && ev_is_default_loop (EV_A))
672	ev_io_start (EV_A_ &sigev);	1073	{
673	ev_unref (EV_A); /* child watcher should not keep loop alive */	1074	int signum;
		1075	gotsig = 0;
		1076
		1077	for (signum = signalmax; signum--; )
		1078	if (signals [signum].gotsig)
		1079	ev_feed_signal_event (EV_A_ signum + 1);
		1080	}
		1081
		1082	#if EV_ASYNC_ENABLE
		1083	if (gotasync)
		1084	{
		1085	int i;
		1086	gotasync = 0;
		1087
		1088	for (i = asynccnt; i--; )
		1089	if (asyncs [i]->sent)
		1090	{
		1091	asyncs [i]->sent = 0;
		1092	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1093	}
		1094	}
		1095	#endif
674	}	1096	}
675		1097
676	/*****************************************************************************/	1098	/*****************************************************************************/
677		1099
678	static struct ev_child *childs [PID_HASHSIZE];	1100	static void
		1101	ev_sighandler (int signum)
		1102	{
		1103	#if EV_MULTIPLICITY
		1104	struct ev_loop *loop = &default_loop_struct;
		1105	#endif
		1106
		1107	#if _WIN32
		1108	signal (signum, ev_sighandler);
		1109	#endif
		1110
		1111	signals [signum - 1].gotsig = 1;
		1112	evpipe_write (EV_A_ &gotsig);
		1113	}
		1114
		1115	void noinline
		1116	ev_feed_signal_event (EV_P_ int signum)
		1117	{
		1118	WL w;
		1119
		1120	#if EV_MULTIPLICITY
		1121	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1122	#endif
		1123
		1124	--signum;
		1125
		1126	if (signum < 0 || signum >= signalmax)
		1127	return;
		1128
		1129	signals [signum].gotsig = 0;
		1130
		1131	for (w = signals [signum].head; w; w = w->next)
		1132	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1133	}
		1134
		1135	/*****************************************************************************/
		1136
		1137	static WL childs [EV_PID_HASHSIZE];
679		1138
680	#ifndef _WIN32	1139	#ifndef _WIN32
681		1140
682	static struct ev_signal childev;	1141	static ev_signal childev;
		1142
		1143	#ifndef WIFCONTINUED
		1144	# define WIFCONTINUED(status) 0
		1145	#endif
		1146
		1147	void inline_speed
		1148	child_reap (EV_P_ int chain, int pid, int status)
		1149	{
		1150	ev_child *w;
		1151	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1152
		1153	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1154	{
		1155	if ((w->pid == pid || !w->pid)
		1156	&& (!traced || (w->flags & 1)))
		1157	{
		1158	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1159	w->rpid = pid;
		1160	w->rstatus = status;
		1161	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1162	}
		1163	}
		1164	}
683		1165
684	#ifndef WCONTINUED	1166	#ifndef WCONTINUED
685	# define WCONTINUED 0	1167	# define WCONTINUED 0
686	#endif	1168	#endif
687		1169
688	static void	1170	static void
689	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
690	{
691	struct ev_child *w;
692
693	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
694	if (w->pid == pid || !w->pid)
695	{
696	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
697	w->rpid = pid;
698	w->rstatus = status;
699	ev_feed_event (EV_A_ (W)w, EV_CHILD);
700	}
701	}
702
703	static void
704	childcb (EV_P_ struct ev_signal *sw, int revents)	1171	childcb (EV_P_ ev_signal *sw, int revents)
705	{	1172	{
706	int pid, status;	1173	int pid, status;
707		1174
		1175	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
708	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	1176	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
709	{	1177	if (!WCONTINUED
		1178	|| errno != EINVAL
		1179	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1180	return;
		1181
710	/* make sure we are called again until all childs have been reaped */	1182	/* make sure we are called again until all children have been reaped */
		1183	/* we need to do it this way so that the callback gets called before we continue */
711	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1184	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
712		1185
713	child_reap (EV_A_ sw, pid, pid, status);	1186	child_reap (EV_A_ pid, pid, status);
		1187	if (EV_PID_HASHSIZE > 1)
714	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	1188	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
715	}
716	}	1189	}
717		1190
718	#endif	1191	#endif
719		1192
720	/*****************************************************************************/	1193	/*****************************************************************************/
…		…
746	{	1219	{
747	return EV_VERSION_MINOR;	1220	return EV_VERSION_MINOR;
748	}	1221	}
749		1222
750	/* return true if we are running with elevated privileges and should ignore env variables */	1223	/* return true if we are running with elevated privileges and should ignore env variables */
751	static int	1224	int inline_size
752	enable_secure (void)	1225	enable_secure (void)
753	{	1226	{
754	#ifdef _WIN32	1227	#ifdef _WIN32
755	return 0;	1228	return 0;
756	#else	1229	#else
…		…
758	|| getgid () != getegid ();	1231	|| getgid () != getegid ();
759	#endif	1232	#endif
760	}	1233	}
761		1234
762	unsigned int	1235	unsigned int
763	ev_method (EV_P)	1236	ev_supported_backends (void)
764	{	1237	{
765	return method;	1238	unsigned int flags = 0;
766	}
767		1239
768	static void	1240	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1241	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1242	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1243	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1244	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1245
		1246	return flags;
		1247	}
		1248
		1249	unsigned int
		1250	ev_recommended_backends (void)
		1251	{
		1252	unsigned int flags = ev_supported_backends ();
		1253
		1254	#ifndef __NetBSD__
		1255	/* kqueue is borked on everything but netbsd apparently */
		1256	/* it usually doesn't work correctly on anything but sockets and pipes */
		1257	flags &= ~EVBACKEND_KQUEUE;
		1258	#endif
		1259	#ifdef __APPLE__
		1260	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1261	flags &= ~EVBACKEND_POLL;
		1262	#endif
		1263
		1264	return flags;
		1265	}
		1266
		1267	unsigned int
		1268	ev_embeddable_backends (void)
		1269	{
		1270	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1271
		1272	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1273	/* please fix it and tell me how to detect the fix */
		1274	flags &= ~EVBACKEND_EPOLL;
		1275
		1276	return flags;
		1277	}
		1278
		1279	unsigned int
		1280	ev_backend (EV_P)
		1281	{
		1282	return backend;
		1283	}
		1284
		1285	unsigned int
		1286	ev_loop_count (EV_P)
		1287	{
		1288	return loop_count;
		1289	}
		1290
		1291	void
		1292	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1293	{
		1294	io_blocktime = interval;
		1295	}
		1296
		1297	void
		1298	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1299	{
		1300	timeout_blocktime = interval;
		1301	}
		1302
		1303	static void noinline
769	loop_init (EV_P_ unsigned int flags)	1304	loop_init (EV_P_ unsigned int flags)
770	{	1305	{
771	if (!method)	1306	if (!backend)
772	{	1307	{
773	#if EV_USE_MONOTONIC	1308	#if EV_USE_MONOTONIC
774	{	1309	{
775	struct timespec ts;	1310	struct timespec ts;
776	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1311	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
777	have_monotonic = 1;	1312	have_monotonic = 1;
778	}	1313	}
779	#endif	1314	#endif
780		1315
781	ev_rt_now = ev_time ();	1316	ev_rt_now = ev_time ();
782	mn_now = get_clock ();	1317	mn_now = get_clock ();
783	now_floor = mn_now;	1318	now_floor = mn_now;
784	rtmn_diff = ev_rt_now - mn_now;	1319	rtmn_diff = ev_rt_now - mn_now;
785		1320
786	if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS"))	1321	io_blocktime = 0.;
		1322	timeout_blocktime = 0.;
		1323	backend = 0;
		1324	backend_fd = -1;
		1325	gotasync = 0;
		1326	#if EV_USE_INOTIFY
		1327	fs_fd = -2;
		1328	#endif
		1329
		1330	/* pid check not overridable via env */
		1331	#ifndef _WIN32
		1332	if (flags & EVFLAG_FORKCHECK)
		1333	curpid = getpid ();
		1334	#endif
		1335
		1336	if (!(flags & EVFLAG_NOENV)
		1337	&& !enable_secure ()
		1338	&& getenv ("LIBEV_FLAGS"))
787	flags = atoi (getenv ("LIBEV_FLAGS"));	1339	flags = atoi (getenv ("LIBEV_FLAGS"));
788		1340
789	if (!(flags & 0x0000ffff))	1341	if (!(flags & 0x0000ffffU))
790	flags |= 0x0000ffff;	1342	flags |= ev_recommended_backends ();
791		1343
792	method = 0;
793	#if EV_USE_PORT	1344	#if EV_USE_PORT
794	if (!method && (flags & EVMETHOD_PORT )) method = port_init (EV_A_ flags);	1345	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
795	#endif	1346	#endif
796	#if EV_USE_KQUEUE	1347	#if EV_USE_KQUEUE
797	if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags);	1348	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
798	#endif	1349	#endif
799	#if EV_USE_EPOLL	1350	#if EV_USE_EPOLL
800	if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags);	1351	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
801	#endif	1352	#endif
802	#if EV_USE_POLL	1353	#if EV_USE_POLL
803	if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags);	1354	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
804	#endif	1355	#endif
805	#if EV_USE_SELECT	1356	#if EV_USE_SELECT
806	if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags);	1357	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
807	#endif	1358	#endif
808		1359
809	ev_init (&sigev, sigcb);	1360	ev_init (&pipeev, pipecb);
810	ev_set_priority (&sigev, EV_MAXPRI);	1361	ev_set_priority (&pipeev, EV_MAXPRI);
811	}	1362	}
812	}	1363	}
813		1364
814	static void	1365	static void noinline
815	loop_destroy (EV_P)	1366	loop_destroy (EV_P)
816	{	1367	{
817	int i;	1368	int i;
818		1369
		1370	if (ev_is_active (&pipeev))
		1371	{
		1372	ev_ref (EV_A); /* signal watcher */
		1373	ev_io_stop (EV_A_ &pipeev);
		1374
		1375	#if EV_USE_EVENTFD
		1376	if (evfd >= 0)
		1377	close (evfd);
		1378	#endif
		1379
		1380	if (evpipe [0] >= 0)
		1381	{
		1382	close (evpipe [0]);
		1383	close (evpipe [1]);
		1384	}
		1385	}
		1386
		1387	#if EV_USE_INOTIFY
		1388	if (fs_fd >= 0)
		1389	close (fs_fd);
		1390	#endif
		1391
		1392	if (backend_fd >= 0)
		1393	close (backend_fd);
		1394
819	#if EV_USE_PORT	1395	#if EV_USE_PORT
820	if (method == EVMETHOD_PORT ) port_destroy (EV_A);	1396	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
821	#endif	1397	#endif
822	#if EV_USE_KQUEUE	1398	#if EV_USE_KQUEUE
823	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);	1399	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
824	#endif	1400	#endif
825	#if EV_USE_EPOLL	1401	#if EV_USE_EPOLL
826	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);	1402	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
827	#endif	1403	#endif
828	#if EV_USE_POLL	1404	#if EV_USE_POLL
829	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);	1405	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
830	#endif	1406	#endif
831	#if EV_USE_SELECT	1407	#if EV_USE_SELECT
832	if (method == EVMETHOD_SELECT) select_destroy (EV_A);	1408	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
833	#endif	1409	#endif
834		1410
835	for (i = NUMPRI; i--; )	1411	for (i = NUMPRI; i--; )
		1412	{
836	array_free (pending, [i]);	1413	array_free (pending, [i]);
		1414	#if EV_IDLE_ENABLE
		1415	array_free (idle, [i]);
		1416	#endif
		1417	}
		1418
		1419	ev_free (anfds); anfdmax = 0;
837		1420
838	/* have to use the microsoft-never-gets-it-right macro */	1421	/* have to use the microsoft-never-gets-it-right macro */
839	array_free (fdchange, EMPTY0);	1422	array_free (fdchange, EMPTY);
840	array_free (timer, EMPTY0);	1423	array_free (timer, EMPTY);
841	#if EV_PERIODICS	1424	#if EV_PERIODIC_ENABLE
842	array_free (periodic, EMPTY0);	1425	array_free (periodic, EMPTY);
843	#endif	1426	#endif
		1427	#if EV_FORK_ENABLE
844	array_free (idle, EMPTY0);	1428	array_free (fork, EMPTY);
		1429	#endif
845	array_free (prepare, EMPTY0);	1430	array_free (prepare, EMPTY);
846	array_free (check, EMPTY0);	1431	array_free (check, EMPTY);
		1432	#if EV_ASYNC_ENABLE
		1433	array_free (async, EMPTY);
		1434	#endif
847		1435
848	method = 0;	1436	backend = 0;
849	}	1437	}
850		1438
851	static void	1439	#if EV_USE_INOTIFY
		1440	void inline_size infy_fork (EV_P);
		1441	#endif
		1442
		1443	void inline_size
852	loop_fork (EV_P)	1444	loop_fork (EV_P)
853	{	1445	{
854	#if EV_USE_PORT	1446	#if EV_USE_PORT
855	if (method == EVMETHOD_PORT ) port_fork (EV_A);	1447	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
856	#endif	1448	#endif
857	#if EV_USE_KQUEUE	1449	#if EV_USE_KQUEUE
858	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);	1450	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
859	#endif	1451	#endif
860	#if EV_USE_EPOLL	1452	#if EV_USE_EPOLL
861	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);	1453	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
862	#endif	1454	#endif
		1455	#if EV_USE_INOTIFY
		1456	infy_fork (EV_A);
		1457	#endif
863		1458
864	if (ev_is_active (&sigev))	1459	if (ev_is_active (&pipeev))
865	{	1460	{
866	/* default loop */	1461	/* this "locks" the handlers against writing to the pipe */
		1462	/* while we modify the fd vars */
		1463	gotsig = 1;
		1464	#if EV_ASYNC_ENABLE
		1465	gotasync = 1;
		1466	#endif
867		1467
868	ev_ref (EV_A);	1468	ev_ref (EV_A);
869	ev_io_stop (EV_A_ &sigev);	1469	ev_io_stop (EV_A_ &pipeev);
		1470
		1471	#if EV_USE_EVENTFD
		1472	if (evfd >= 0)
		1473	close (evfd);
		1474	#endif
		1475
		1476	if (evpipe [0] >= 0)
		1477	{
870	close (sigpipe [0]);	1478	close (evpipe [0]);
871	close (sigpipe [1]);	1479	close (evpipe [1]);
		1480	}
872		1481
873	while (pipe (sigpipe))
874	syserr ("(libev) error creating pipe");
875
876	siginit (EV_A);	1482	evpipe_init (EV_A);
		1483	/* now iterate over everything, in case we missed something */
		1484	pipecb (EV_A_ &pipeev, EV_READ);
877	}	1485	}
878		1486
879	postfork = 0;	1487	postfork = 0;
880	}	1488	}
881		1489
882	#if EV_MULTIPLICITY	1490	#if EV_MULTIPLICITY
		1491
883	struct ev_loop *	1492	struct ev_loop *
884	ev_loop_new (unsigned int flags)	1493	ev_loop_new (unsigned int flags)
885	{	1494	{
886	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	1495	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
887		1496
888	memset (loop, 0, sizeof (struct ev_loop));	1497	memset (loop, 0, sizeof (struct ev_loop));
889		1498
890	loop_init (EV_A_ flags);	1499	loop_init (EV_A_ flags);
891		1500
892	if (ev_method (EV_A))	1501	if (ev_backend (EV_A))
893	return loop;	1502	return loop;
894		1503
895	return 0;	1504	return 0;
896	}	1505	}
897		1506
…		…
903	}	1512	}
904		1513
905	void	1514	void
906	ev_loop_fork (EV_P)	1515	ev_loop_fork (EV_P)
907	{	1516	{
908	postfork = 1;	1517	postfork = 1; /* must be in line with ev_default_fork */
909	}	1518	}
910		1519
		1520	#if EV_VERIFY
		1521	static void noinline
		1522	verify_watcher (EV_P_ W w)
		1523	{
		1524	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
		1525
		1526	if (w->pending)
		1527	assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
		1528	}
		1529
		1530	static void noinline
		1531	verify_heap (EV_P_ ANHE *heap, int N)
		1532	{
		1533	int i;
		1534
		1535	for (i = HEAP0; i < N + HEAP0; ++i)
		1536	{
		1537	assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
		1538	assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
		1539	assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
		1540
		1541	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
		1542	}
		1543	}
		1544
		1545	static void noinline
		1546	array_verify (EV_P_ W *ws, int cnt)
		1547	{
		1548	while (cnt--)
		1549	{
		1550	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
		1551	verify_watcher (EV_A_ ws [cnt]);
		1552	}
		1553	}
		1554	#endif
		1555
		1556	void
		1557	ev_loop_verify (EV_P)
		1558	{
		1559	#if EV_VERIFY
		1560	int i;
		1561	WL w;
		1562
		1563	assert (activecnt >= -1);
		1564
		1565	assert (fdchangemax >= fdchangecnt);
		1566	for (i = 0; i < fdchangecnt; ++i)
		1567	assert (("negative fd in fdchanges", fdchanges [i] >= 0));
		1568
		1569	assert (anfdmax >= 0);
		1570	for (i = 0; i < anfdmax; ++i)
		1571	for (w = anfds [i].head; w; w = w->next)
		1572	{
		1573	verify_watcher (EV_A_ (W)w);
		1574	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
		1575	assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
		1576	}
		1577
		1578	assert (timermax >= timercnt);
		1579	verify_heap (EV_A_ timers, timercnt);
		1580
		1581	#if EV_PERIODIC_ENABLE
		1582	assert (periodicmax >= periodiccnt);
		1583	verify_heap (EV_A_ periodics, periodiccnt);
		1584	#endif
		1585
		1586	for (i = NUMPRI; i--; )
		1587	{
		1588	assert (pendingmax [i] >= pendingcnt [i]);
		1589	#if EV_IDLE_ENABLE
		1590	assert (idleall >= 0);
		1591	assert (idlemax [i] >= idlecnt [i]);
		1592	array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
		1593	#endif
		1594	}
		1595
		1596	#if EV_FORK_ENABLE
		1597	assert (forkmax >= forkcnt);
		1598	array_verify (EV_A_ (W *)forks, forkcnt);
		1599	#endif
		1600
		1601	#if EV_ASYNC_ENABLE
		1602	assert (asyncmax >= asynccnt);
		1603	array_verify (EV_A_ (W *)asyncs, asynccnt);
		1604	#endif
		1605
		1606	assert (preparemax >= preparecnt);
		1607	array_verify (EV_A_ (W *)prepares, preparecnt);
		1608
		1609	assert (checkmax >= checkcnt);
		1610	array_verify (EV_A_ (W *)checks, checkcnt);
		1611
		1612	# if 0
		1613	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1614	for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
911	#endif	1615	# endif
		1616	#endif
		1617	}
		1618
		1619	#endif /* multiplicity */
912		1620
913	#if EV_MULTIPLICITY	1621	#if EV_MULTIPLICITY
914	struct ev_loop *	1622	struct ev_loop *
915	ev_default_loop_init (unsigned int flags)	1623	ev_default_loop_init (unsigned int flags)
916	#else	1624	#else
917	int	1625	int
918	ev_default_loop (unsigned int flags)	1626	ev_default_loop (unsigned int flags)
919	#endif	1627	#endif
920	{	1628	{
921	if (sigpipe [0] == sigpipe [1])
922	if (pipe (sigpipe))
923	return 0;
924
925	if (!ev_default_loop_ptr)	1629	if (!ev_default_loop_ptr)
926	{	1630	{
927	#if EV_MULTIPLICITY	1631	#if EV_MULTIPLICITY
928	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1632	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
929	#else	1633	#else
930	ev_default_loop_ptr = 1;	1634	ev_default_loop_ptr = 1;
931	#endif	1635	#endif
932		1636
933	loop_init (EV_A_ flags);	1637	loop_init (EV_A_ flags);
934		1638
935	if (ev_method (EV_A))	1639	if (ev_backend (EV_A))
936	{	1640	{
937	siginit (EV_A);
938
939	#ifndef _WIN32	1641	#ifndef _WIN32
940	ev_signal_init (&childev, childcb, SIGCHLD);	1642	ev_signal_init (&childev, childcb, SIGCHLD);
941	ev_set_priority (&childev, EV_MAXPRI);	1643	ev_set_priority (&childev, EV_MAXPRI);
942	ev_signal_start (EV_A_ &childev);	1644	ev_signal_start (EV_A_ &childev);
943	ev_unref (EV_A); /* child watcher should not keep loop alive */	1645	ev_unref (EV_A); /* child watcher should not keep loop alive */
…		…
960	#ifndef _WIN32	1662	#ifndef _WIN32
961	ev_ref (EV_A); /* child watcher */	1663	ev_ref (EV_A); /* child watcher */
962	ev_signal_stop (EV_A_ &childev);	1664	ev_signal_stop (EV_A_ &childev);
963	#endif	1665	#endif
964		1666
965	ev_ref (EV_A); /* signal watcher */
966	ev_io_stop (EV_A_ &sigev);
967
968	close (sigpipe [0]); sigpipe [0] = 0;
969	close (sigpipe [1]); sigpipe [1] = 0;
970
971	loop_destroy (EV_A);	1667	loop_destroy (EV_A);
972	}	1668	}
973		1669
974	void	1670	void
975	ev_default_fork (void)	1671	ev_default_fork (void)
976	{	1672	{
977	#if EV_MULTIPLICITY	1673	#if EV_MULTIPLICITY
978	struct ev_loop *loop = ev_default_loop_ptr;	1674	struct ev_loop *loop = ev_default_loop_ptr;
979	#endif	1675	#endif
980		1676
981	if (method)	1677	if (backend)
982	postfork = 1;	1678	postfork = 1; /* must be in line with ev_loop_fork */
983	}	1679	}
984		1680
985	/*****************************************************************************/	1681	/*****************************************************************************/
986		1682
987	static int	1683	void
988	any_pending (EV_P)	1684	ev_invoke (EV_P_ void *w, int revents)
989	{	1685	{
990	int pri;	1686	EV_CB_INVOKE ((W)w, revents);
991
992	for (pri = NUMPRI; pri--; )
993	if (pendingcnt [pri])
994	return 1;
995
996	return 0;
997	}	1687	}
998		1688
999	inline void	1689	void inline_speed
1000	call_pending (EV_P)	1690	call_pending (EV_P)
1001	{	1691	{
1002	int pri;	1692	int pri;
1003		1693
1004	for (pri = NUMPRI; pri--; )	1694	for (pri = NUMPRI; pri--; )
…		…
1006	{	1696	{
1007	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1697	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1008		1698
1009	if (expect_true (p->w))	1699	if (expect_true (p->w))
1010	{	1700	{
		1701	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1702
1011	p->w->pending = 0;	1703	p->w->pending = 0;
1012	EV_CB_INVOKE (p->w, p->events);	1704	EV_CB_INVOKE (p->w, p->events);
		1705	EV_FREQUENT_CHECK;
1013	}	1706	}
1014	}	1707	}
1015	}	1708	}
1016		1709
1017	inline void	1710	#if EV_IDLE_ENABLE
		1711	void inline_size
		1712	idle_reify (EV_P)
		1713	{
		1714	if (expect_false (idleall))
		1715	{
		1716	int pri;
		1717
		1718	for (pri = NUMPRI; pri--; )
		1719	{
		1720	if (pendingcnt [pri])
		1721	break;
		1722
		1723	if (idlecnt [pri])
		1724	{
		1725	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1726	break;
		1727	}
		1728	}
		1729	}
		1730	}
		1731	#endif
		1732
		1733	void inline_size
1018	timers_reify (EV_P)	1734	timers_reify (EV_P)
1019	{	1735	{
		1736	EV_FREQUENT_CHECK;
		1737
1020	while (timercnt && ((WT)timers [0])->at <= mn_now)	1738	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1021	{	1739	{
1022	struct ev_timer *w = timers [0];	1740	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1023		1741
1024	assert (("inactive timer on timer heap detected", ev_is_active (w)));	1742	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1025		1743
1026	/* first reschedule or stop timer */	1744	/* first reschedule or stop timer */
1027	if (w->repeat)	1745	if (w->repeat)
1028	{	1746	{
		1747	ev_at (w) += w->repeat;
		1748	if (ev_at (w) < mn_now)
		1749	ev_at (w) = mn_now;
		1750
1029	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1751	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1030		1752
1031	((WT)w)->at += w->repeat;	1753	ANHE_at_cache (timers [HEAP0]);
1032	if (((WT)w)->at < mn_now)
1033	((WT)w)->at = mn_now;
1034
1035	downheap ((WT *)timers, timercnt, 0);	1754	downheap (timers, timercnt, HEAP0);
1036	}	1755	}
1037	else	1756	else
1038	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1757	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1039		1758
		1759	EV_FREQUENT_CHECK;
1040	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1760	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1041	}	1761	}
1042	}	1762	}
1043		1763
1044	#if EV_PERIODICS	1764	#if EV_PERIODIC_ENABLE
1045	inline void	1765	void inline_size
1046	periodics_reify (EV_P)	1766	periodics_reify (EV_P)
1047	{	1767	{
		1768	EV_FREQUENT_CHECK;
		1769
1048	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)	1770	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1049	{	1771	{
1050	struct ev_periodic *w = periodics [0];	1772	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1051		1773
1052	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	1774	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1053		1775
1054	/* first reschedule or stop timer */	1776	/* first reschedule or stop timer */
1055	if (w->reschedule_cb)	1777	if (w->reschedule_cb)
1056	{	1778	{
1057	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);	1779	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1780
1058	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));	1781	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		1782
		1783	ANHE_at_cache (periodics [HEAP0]);
1059	downheap ((WT *)periodics, periodiccnt, 0);	1784	downheap (periodics, periodiccnt, HEAP0);
1060	}	1785	}
1061	else if (w->interval)	1786	else if (w->interval)
1062	{	1787	{
1063	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;	1788	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1064	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));	1789	/* if next trigger time is not sufficiently in the future, put it there */
		1790	/* this might happen because of floating point inexactness */
		1791	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1792	{
		1793	ev_at (w) += w->interval;
		1794
		1795	/* if interval is unreasonably low we might still have a time in the past */
		1796	/* so correct this. this will make the periodic very inexact, but the user */
		1797	/* has effectively asked to get triggered more often than possible */
		1798	if (ev_at (w) < ev_rt_now)
		1799	ev_at (w) = ev_rt_now;
		1800	}
		1801
		1802	ANHE_at_cache (periodics [HEAP0]);
1065	downheap ((WT *)periodics, periodiccnt, 0);	1803	downheap (periodics, periodiccnt, HEAP0);
1066	}	1804	}
1067	else	1805	else
1068	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1806	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1069		1807
		1808	EV_FREQUENT_CHECK;
1070	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1809	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1071	}	1810	}
1072	}	1811	}
1073		1812
1074	static void	1813	static void noinline
1075	periodics_reschedule (EV_P)	1814	periodics_reschedule (EV_P)
1076	{	1815	{
1077	int i;	1816	int i;
1078		1817
1079	/* adjust periodics after time jump */	1818	/* adjust periodics after time jump */
1080	for (i = 0; i < periodiccnt; ++i)	1819	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1081	{	1820	{
1082	struct ev_periodic *w = periodics [i];	1821	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1083		1822
1084	if (w->reschedule_cb)	1823	if (w->reschedule_cb)
1085	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	1824	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1086	else if (w->interval)	1825	else if (w->interval)
1087	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	1826	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1827
		1828	ANHE_at_cache (periodics [i]);
		1829	}
		1830
		1831	reheap (periodics, periodiccnt);
		1832	}
		1833	#endif
		1834
		1835	void inline_speed
		1836	time_update (EV_P_ ev_tstamp max_block)
		1837	{
		1838	int i;
		1839
		1840	#if EV_USE_MONOTONIC
		1841	if (expect_true (have_monotonic))
1088	}	1842	{
		1843	ev_tstamp odiff = rtmn_diff;
1089		1844
1090	/* now rebuild the heap */
1091	for (i = periodiccnt >> 1; i--; )
1092	downheap ((WT *)periodics, periodiccnt, i);
1093	}
1094	#endif
1095
1096	inline int
1097	time_update_monotonic (EV_P)
1098	{
1099	mn_now = get_clock ();	1845	mn_now = get_clock ();
1100		1846
		1847	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1848	/* interpolate in the meantime */
1101	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1849	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1102	{	1850	{
1103	ev_rt_now = rtmn_diff + mn_now;	1851	ev_rt_now = rtmn_diff + mn_now;
1104	return 0;	1852	return;
1105	}	1853	}
1106	else	1854
1107	{
1108	now_floor = mn_now;	1855	now_floor = mn_now;
1109	ev_rt_now = ev_time ();	1856	ev_rt_now = ev_time ();
1110	return 1;
1111	}
1112	}
1113		1857
1114	inline void	1858	/* loop a few times, before making important decisions.
1115	time_update (EV_P)	1859	* on the choice of "4": one iteration isn't enough,
1116	{	1860	* in case we get preempted during the calls to
1117	int i;	1861	* ev_time and get_clock. a second call is almost guaranteed
1118		1862	* to succeed in that case, though. and looping a few more times
1119	#if EV_USE_MONOTONIC	1863	* doesn't hurt either as we only do this on time-jumps or
1120	if (expect_true (have_monotonic))	1864	* in the unlikely event of having been preempted here.
1121	{	1865	*/
1122	if (time_update_monotonic (EV_A))	1866	for (i = 4; --i; )
1123	{	1867	{
1124	ev_tstamp odiff = rtmn_diff;	1868	rtmn_diff = ev_rt_now - mn_now;
1125		1869
1126	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1870	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
		1871	return; /* all is well */
		1872
		1873	ev_rt_now = ev_time ();
		1874	mn_now = get_clock ();
		1875	now_floor = mn_now;
		1876	}
		1877
		1878	# if EV_PERIODIC_ENABLE
		1879	periodics_reschedule (EV_A);
		1880	# endif
		1881	/* no timer adjustment, as the monotonic clock doesn't jump */
		1882	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1883	}
		1884	else
		1885	#endif
		1886	{
		1887	ev_rt_now = ev_time ();
		1888
		1889	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1890	{
		1891	#if EV_PERIODIC_ENABLE
		1892	periodics_reschedule (EV_A);
		1893	#endif
		1894	/* adjust timers. this is easy, as the offset is the same for all of them */
		1895	for (i = 0; i < timercnt; ++i)
1127	{	1896	{
1128	rtmn_diff = ev_rt_now - mn_now;	1897	ANHE *he = timers + i + HEAP0;
1129		1898	ANHE_w (*he)->at += ev_rt_now - mn_now;
1130	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1899	ANHE_at_cache (*he);
1131	return; /* all is well */
1132
1133	ev_rt_now = ev_time ();
1134	mn_now = get_clock ();
1135	now_floor = mn_now;
1136	}	1900	}
1137
1138	# if EV_PERIODICS
1139	periodics_reschedule (EV_A);
1140	# endif
1141	/* no timer adjustment, as the monotonic clock doesn't jump */
1142	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1143	}	1901	}
1144	}
1145	else
1146	#endif
1147	{
1148	ev_rt_now = ev_time ();
1149
1150	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1151	{
1152	#if EV_PERIODICS
1153	periodics_reschedule (EV_A);
1154	#endif
1155
1156	/* adjust timers. this is easy, as the offset is the same for all */
1157	for (i = 0; i < timercnt; ++i)
1158	((WT)timers [i])->at += ev_rt_now - mn_now;
1159	}
1160		1902
1161	mn_now = ev_rt_now;	1903	mn_now = ev_rt_now;
1162	}	1904	}
1163	}	1905	}
1164		1906
…		…
1172	ev_unref (EV_P)	1914	ev_unref (EV_P)
1173	{	1915	{
1174	--activecnt;	1916	--activecnt;
1175	}	1917	}
1176		1918
		1919	void
		1920	ev_now_update (EV_P)
		1921	{
		1922	time_update (EV_A_ 1e100);
		1923	}
		1924
1177	static int loop_done;	1925	static int loop_done;
1178		1926
1179	void	1927	void
1180	ev_loop (EV_P_ int flags)	1928	ev_loop (EV_P_ int flags)
1181	{	1929	{
1182	double block;	1930	loop_done = EVUNLOOP_CANCEL;
1183	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
1184		1931
1185	while (activecnt)	1932	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
		1933
		1934	do
1186	{	1935	{
		1936	#if EV_VERIFY >= 2
		1937	ev_loop_verify (EV_A);
		1938	#endif
		1939
		1940	#ifndef _WIN32
		1941	if (expect_false (curpid)) /* penalise the forking check even more */
		1942	if (expect_false (getpid () != curpid))
		1943	{
		1944	curpid = getpid ();
		1945	postfork = 1;
		1946	}
		1947	#endif
		1948
		1949	#if EV_FORK_ENABLE
		1950	/* we might have forked, so queue fork handlers */
		1951	if (expect_false (postfork))
		1952	if (forkcnt)
		1953	{
		1954	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1955	call_pending (EV_A);
		1956	}
		1957	#endif
		1958
1187	/* queue check watchers (and execute them) */	1959	/* queue prepare watchers (and execute them) */
1188	if (expect_false (preparecnt))	1960	if (expect_false (preparecnt))
1189	{	1961	{
1190	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1962	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1191	call_pending (EV_A);	1963	call_pending (EV_A);
1192	}	1964	}
1193		1965
		1966	if (expect_false (!activecnt))
		1967	break;
		1968
1194	/* we might have forked, so reify kernel state if necessary */	1969	/* we might have forked, so reify kernel state if necessary */
1195	if (expect_false (postfork))	1970	if (expect_false (postfork))
1196	loop_fork (EV_A);	1971	loop_fork (EV_A);
1197		1972
1198	/* update fd-related kernel structures */	1973	/* update fd-related kernel structures */
1199	fd_reify (EV_A);	1974	fd_reify (EV_A);
1200		1975
1201	/* calculate blocking time */	1976	/* calculate blocking time */
		1977	{
		1978	ev_tstamp waittime = 0.;
		1979	ev_tstamp sleeptime = 0.;
1202		1980
1203	/* we only need this for !monotonic clock or timers, but as we basically	1981	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1204	always have timers, we just calculate it always */
1205	#if EV_USE_MONOTONIC
1206	if (expect_true (have_monotonic))
1207	time_update_monotonic (EV_A);
1208	else
1209	#endif
1210	{	1982	{
1211	ev_rt_now = ev_time ();	1983	/* update time to cancel out callback processing overhead */
1212	mn_now = ev_rt_now;	1984	time_update (EV_A_ 1e100);
1213	}
1214		1985
1215	if (flags & EVLOOP_NONBLOCK || idlecnt)
1216	block = 0.;
1217	else
1218	{
1219	block = MAX_BLOCKTIME;	1986	waittime = MAX_BLOCKTIME;
1220		1987
1221	if (timercnt)	1988	if (timercnt)
1222	{	1989	{
1223	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;	1990	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1224	if (block > to) block = to;	1991	if (waittime > to) waittime = to;
1225	}	1992	}
1226		1993
1227	#if EV_PERIODICS	1994	#if EV_PERIODIC_ENABLE
1228	if (periodiccnt)	1995	if (periodiccnt)
1229	{	1996	{
1230	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;	1997	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1231	if (block > to) block = to;	1998	if (waittime > to) waittime = to;
1232	}	1999	}
1233	#endif	2000	#endif
1234		2001
1235	if (expect_false (block < 0.)) block = 0.;	2002	if (expect_false (waittime < timeout_blocktime))
		2003	waittime = timeout_blocktime;
		2004
		2005	sleeptime = waittime - backend_fudge;
		2006
		2007	if (expect_true (sleeptime > io_blocktime))
		2008	sleeptime = io_blocktime;
		2009
		2010	if (sleeptime)
		2011	{
		2012	ev_sleep (sleeptime);
		2013	waittime -= sleeptime;
		2014	}
1236	}	2015	}
1237		2016
1238	method_poll (EV_A_ block);	2017	++loop_count;
		2018	backend_poll (EV_A_ waittime);
1239		2019
1240	/* update ev_rt_now, do magic */	2020	/* update ev_rt_now, do magic */
1241	time_update (EV_A);	2021	time_update (EV_A_ waittime + sleeptime);
		2022	}
1242		2023
1243	/* queue pending timers and reschedule them */	2024	/* queue pending timers and reschedule them */
1244	timers_reify (EV_A); /* relative timers called last */	2025	timers_reify (EV_A); /* relative timers called last */
1245	#if EV_PERIODICS	2026	#if EV_PERIODIC_ENABLE
1246	periodics_reify (EV_A); /* absolute timers called first */	2027	periodics_reify (EV_A); /* absolute timers called first */
1247	#endif	2028	#endif
1248		2029
		2030	#if EV_IDLE_ENABLE
1249	/* queue idle watchers unless io or timers are pending */	2031	/* queue idle watchers unless other events are pending */
1250	if (idlecnt && !any_pending (EV_A))	2032	idle_reify (EV_A);
1251	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	2033	#endif
1252		2034
1253	/* queue check watchers, to be executed first */	2035	/* queue check watchers, to be executed first */
1254	if (expect_false (checkcnt))	2036	if (expect_false (checkcnt))
1255	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2037	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1256		2038
1257	call_pending (EV_A);	2039	call_pending (EV_A);
1258
1259	if (expect_false (loop_done))
1260	break;
1261	}	2040	}
		2041	while (expect_true (
		2042	activecnt
		2043	&& !loop_done
		2044	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		2045	));
1262		2046
1263	if (loop_done != 2)	2047	if (loop_done == EVUNLOOP_ONE)
1264	loop_done = 0;	2048	loop_done = EVUNLOOP_CANCEL;
1265	}	2049	}
1266		2050
1267	void	2051	void
1268	ev_unloop (EV_P_ int how)	2052	ev_unloop (EV_P_ int how)
1269	{	2053	{
1270	loop_done = how;	2054	loop_done = how;
1271	}	2055	}
1272		2056
1273	/*****************************************************************************/	2057	/*****************************************************************************/
1274		2058
1275	inline void	2059	void inline_size
1276	wlist_add (WL *head, WL elem)	2060	wlist_add (WL *head, WL elem)
1277	{	2061	{
1278	elem->next = *head;	2062	elem->next = *head;
1279	*head = elem;	2063	*head = elem;
1280	}	2064	}
1281		2065
1282	inline void	2066	void inline_size
1283	wlist_del (WL *head, WL elem)	2067	wlist_del (WL *head, WL elem)
1284	{	2068	{
1285	while (*head)	2069	while (*head)
1286	{	2070	{
1287	if (*head == elem)	2071	if (*head == elem)
…		…
1292		2076
1293	head = &(*head)->next;	2077	head = &(*head)->next;
1294	}	2078	}
1295	}	2079	}
1296		2080
1297	inline void	2081	void inline_speed
1298	ev_clear_pending (EV_P_ W w)	2082	clear_pending (EV_P_ W w)
1299	{	2083	{
1300	if (w->pending)	2084	if (w->pending)
1301	{	2085	{
1302	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2086	pendings [ABSPRI (w)][w->pending - 1].w = 0;
1303	w->pending = 0;	2087	w->pending = 0;
1304	}	2088	}
1305	}	2089	}
1306		2090
1307	inline void	2091	int
		2092	ev_clear_pending (EV_P_ void *w)
		2093	{
		2094	W w_ = (W)w;
		2095	int pending = w_->pending;
		2096
		2097	if (expect_true (pending))
		2098	{
		2099	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2100	w_->pending = 0;
		2101	p->w = 0;
		2102	return p->events;
		2103	}
		2104	else
		2105	return 0;
		2106	}
		2107
		2108	void inline_size
		2109	pri_adjust (EV_P_ W w)
		2110	{
		2111	int pri = w->priority;
		2112	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		2113	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		2114	w->priority = pri;
		2115	}
		2116
		2117	void inline_speed
1308	ev_start (EV_P_ W w, int active)	2118	ev_start (EV_P_ W w, int active)
1309	{	2119	{
1310	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	2120	pri_adjust (EV_A_ w);
1311	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1312
1313	w->active = active;	2121	w->active = active;
1314	ev_ref (EV_A);	2122	ev_ref (EV_A);
1315	}	2123	}
1316		2124
1317	inline void	2125	void inline_size
1318	ev_stop (EV_P_ W w)	2126	ev_stop (EV_P_ W w)
1319	{	2127	{
1320	ev_unref (EV_A);	2128	ev_unref (EV_A);
1321	w->active = 0;	2129	w->active = 0;
1322	}	2130	}
1323		2131
1324	/*****************************************************************************/	2132	/*****************************************************************************/
1325		2133
1326	void	2134	void noinline
1327	ev_io_start (EV_P_ struct ev_io *w)	2135	ev_io_start (EV_P_ ev_io *w)
1328	{	2136	{
1329	int fd = w->fd;	2137	int fd = w->fd;
1330		2138
1331	if (expect_false (ev_is_active (w)))	2139	if (expect_false (ev_is_active (w)))
1332	return;	2140	return;
1333		2141
1334	assert (("ev_io_start called with negative fd", fd >= 0));	2142	assert (("ev_io_start called with negative fd", fd >= 0));
1335		2143
		2144	EV_FREQUENT_CHECK;
		2145
1336	ev_start (EV_A_ (W)w, 1);	2146	ev_start (EV_A_ (W)w, 1);
1337	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	2147	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1338	wlist_add ((WL *)&anfds[fd].head, (WL)w);	2148	wlist_add (&anfds[fd].head, (WL)w);
1339		2149
1340	fd_change (EV_A_ fd);	2150	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1341	}	2151	w->events &= ~EV_IOFDSET;
1342		2152
1343	void	2153	EV_FREQUENT_CHECK;
		2154	}
		2155
		2156	void noinline
1344	ev_io_stop (EV_P_ struct ev_io *w)	2157	ev_io_stop (EV_P_ ev_io *w)
1345	{	2158	{
1346	ev_clear_pending (EV_A_ (W)w);	2159	clear_pending (EV_A_ (W)w);
1347	if (expect_false (!ev_is_active (w)))	2160	if (expect_false (!ev_is_active (w)))
1348	return;	2161	return;
1349		2162
1350	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2163	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1351		2164
		2165	EV_FREQUENT_CHECK;
		2166
1352	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	2167	wlist_del (&anfds[w->fd].head, (WL)w);
1353	ev_stop (EV_A_ (W)w);	2168	ev_stop (EV_A_ (W)w);
1354		2169
1355	fd_change (EV_A_ w->fd);	2170	fd_change (EV_A_ w->fd, 1);
1356	}
1357		2171
1358	void	2172	EV_FREQUENT_CHECK;
		2173	}
		2174
		2175	void noinline
1359	ev_timer_start (EV_P_ struct ev_timer *w)	2176	ev_timer_start (EV_P_ ev_timer *w)
1360	{	2177	{
1361	if (expect_false (ev_is_active (w)))	2178	if (expect_false (ev_is_active (w)))
1362	return;	2179	return;
1363		2180
1364	((WT)w)->at += mn_now;	2181	ev_at (w) += mn_now;
1365		2182
1366	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2183	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1367		2184
		2185	EV_FREQUENT_CHECK;
		2186
		2187	++timercnt;
1368	ev_start (EV_A_ (W)w, ++timercnt);	2188	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1369	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);	2189	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1370	timers [timercnt - 1] = w;	2190	ANHE_w (timers [ev_active (w)]) = (WT)w;
1371	upheap ((WT *)timers, timercnt - 1);	2191	ANHE_at_cache (timers [ev_active (w)]);
		2192	upheap (timers, ev_active (w));
1372		2193
		2194	EV_FREQUENT_CHECK;
		2195
1373	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2196	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1374	}	2197	}
1375		2198
1376	void	2199	void noinline
1377	ev_timer_stop (EV_P_ struct ev_timer *w)	2200	ev_timer_stop (EV_P_ ev_timer *w)
1378	{	2201	{
1379	ev_clear_pending (EV_A_ (W)w);	2202	clear_pending (EV_A_ (W)w);
1380	if (expect_false (!ev_is_active (w)))	2203	if (expect_false (!ev_is_active (w)))
1381	return;	2204	return;
1382		2205
		2206	EV_FREQUENT_CHECK;
		2207
		2208	{
		2209	int active = ev_active (w);
		2210
1383	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2211	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1384		2212
		2213	--timercnt;
		2214
1385	if (expect_true (((W)w)->active < timercnt--))	2215	if (expect_true (active < timercnt + HEAP0))
1386	{	2216	{
1387	timers [((W)w)->active - 1] = timers [timercnt];	2217	timers [active] = timers [timercnt + HEAP0];
1388	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2218	adjustheap (timers, timercnt, active);
1389	}	2219	}
		2220	}
1390		2221
1391	((WT)w)->at -= mn_now;	2222	EV_FREQUENT_CHECK;
		2223
		2224	ev_at (w) -= mn_now;
1392		2225
1393	ev_stop (EV_A_ (W)w);	2226	ev_stop (EV_A_ (W)w);
1394	}	2227	}
1395		2228
1396	void	2229	void noinline
1397	ev_timer_again (EV_P_ struct ev_timer *w)	2230	ev_timer_again (EV_P_ ev_timer *w)
1398	{	2231	{
		2232	EV_FREQUENT_CHECK;
		2233
1399	if (ev_is_active (w))	2234	if (ev_is_active (w))
1400	{	2235	{
1401	if (w->repeat)	2236	if (w->repeat)
1402	{	2237	{
1403	((WT)w)->at = mn_now + w->repeat;	2238	ev_at (w) = mn_now + w->repeat;
		2239	ANHE_at_cache (timers [ev_active (w)]);
1404	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2240	adjustheap (timers, timercnt, ev_active (w));
1405	}	2241	}
1406	else	2242	else
1407	ev_timer_stop (EV_A_ w);	2243	ev_timer_stop (EV_A_ w);
1408	}	2244	}
1409	else if (w->repeat)	2245	else if (w->repeat)
1410	{	2246	{
1411	w->at = w->repeat;	2247	ev_at (w) = w->repeat;
1412	ev_timer_start (EV_A_ w);	2248	ev_timer_start (EV_A_ w);
1413	}	2249	}
1414	}
1415		2250
		2251	EV_FREQUENT_CHECK;
		2252	}
		2253
1416	#if EV_PERIODICS	2254	#if EV_PERIODIC_ENABLE
1417	void	2255	void noinline
1418	ev_periodic_start (EV_P_ struct ev_periodic *w)	2256	ev_periodic_start (EV_P_ ev_periodic *w)
1419	{	2257	{
1420	if (expect_false (ev_is_active (w)))	2258	if (expect_false (ev_is_active (w)))
1421	return;	2259	return;
1422		2260
1423	if (w->reschedule_cb)	2261	if (w->reschedule_cb)
1424	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2262	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1425	else if (w->interval)	2263	else if (w->interval)
1426	{	2264	{
1427	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2265	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1428	/* this formula differs from the one in periodic_reify because we do not always round up */	2266	/* this formula differs from the one in periodic_reify because we do not always round up */
1429	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	2267	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1430	}	2268	}
		2269	else
		2270	ev_at (w) = w->offset;
1431		2271
		2272	EV_FREQUENT_CHECK;
		2273
		2274	++periodiccnt;
1432	ev_start (EV_A_ (W)w, ++periodiccnt);	2275	ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1433	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);	2276	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1434	periodics [periodiccnt - 1] = w;	2277	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1435	upheap ((WT *)periodics, periodiccnt - 1);	2278	ANHE_at_cache (periodics [ev_active (w)]);
		2279	upheap (periodics, ev_active (w));
1436		2280
		2281	EV_FREQUENT_CHECK;
		2282
1437	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2283	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1438	}	2284	}
1439		2285
1440	void	2286	void noinline
1441	ev_periodic_stop (EV_P_ struct ev_periodic *w)	2287	ev_periodic_stop (EV_P_ ev_periodic *w)
1442	{	2288	{
1443	ev_clear_pending (EV_A_ (W)w);	2289	clear_pending (EV_A_ (W)w);
1444	if (expect_false (!ev_is_active (w)))	2290	if (expect_false (!ev_is_active (w)))
1445	return;	2291	return;
1446		2292
		2293	EV_FREQUENT_CHECK;
		2294
		2295	{
		2296	int active = ev_active (w);
		2297
1447	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2298	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1448		2299
		2300	--periodiccnt;
		2301
1449	if (expect_true (((W)w)->active < periodiccnt--))	2302	if (expect_true (active < periodiccnt + HEAP0))
1450	{	2303	{
1451	periodics [((W)w)->active - 1] = periodics [periodiccnt];	2304	periodics [active] = periodics [periodiccnt + HEAP0];
1452	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	2305	adjustheap (periodics, periodiccnt, active);
1453	}	2306	}
		2307	}
		2308
		2309	EV_FREQUENT_CHECK;
1454		2310
1455	ev_stop (EV_A_ (W)w);	2311	ev_stop (EV_A_ (W)w);
1456	}	2312	}
1457		2313
1458	void	2314	void noinline
1459	ev_periodic_again (EV_P_ struct ev_periodic *w)	2315	ev_periodic_again (EV_P_ ev_periodic *w)
1460	{	2316	{
1461	/* TODO: use adjustheap and recalculation */	2317	/* TODO: use adjustheap and recalculation */
1462	ev_periodic_stop (EV_A_ w);	2318	ev_periodic_stop (EV_A_ w);
1463	ev_periodic_start (EV_A_ w);	2319	ev_periodic_start (EV_A_ w);
1464	}	2320	}
1465	#endif	2321	#endif
1466		2322
1467	void	2323	#ifndef SA_RESTART
1468	ev_idle_start (EV_P_ struct ev_idle *w)	2324	# define SA_RESTART 0
		2325	#endif
		2326
		2327	void noinline
		2328	ev_signal_start (EV_P_ ev_signal *w)
1469	{	2329	{
		2330	#if EV_MULTIPLICITY
		2331	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2332	#endif
1470	if (expect_false (ev_is_active (w)))	2333	if (expect_false (ev_is_active (w)))
1471	return;	2334	return;
1472		2335
1473	ev_start (EV_A_ (W)w, ++idlecnt);
1474	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1475	idles [idlecnt - 1] = w;
1476	}
1477
1478	void
1479	ev_idle_stop (EV_P_ struct ev_idle *w)
1480	{
1481	ev_clear_pending (EV_A_ (W)w);
1482	if (expect_false (!ev_is_active (w)))
1483	return;
1484
1485	idles [((W)w)->active - 1] = idles [--idlecnt];
1486	ev_stop (EV_A_ (W)w);
1487	}
1488
1489	void
1490	ev_prepare_start (EV_P_ struct ev_prepare *w)
1491	{
1492	if (expect_false (ev_is_active (w)))
1493	return;
1494
1495	ev_start (EV_A_ (W)w, ++preparecnt);
1496	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1497	prepares [preparecnt - 1] = w;
1498	}
1499
1500	void
1501	ev_prepare_stop (EV_P_ struct ev_prepare *w)
1502	{
1503	ev_clear_pending (EV_A_ (W)w);
1504	if (expect_false (!ev_is_active (w)))
1505	return;
1506
1507	prepares [((W)w)->active - 1] = prepares [--preparecnt];
1508	ev_stop (EV_A_ (W)w);
1509	}
1510
1511	void
1512	ev_check_start (EV_P_ struct ev_check *w)
1513	{
1514	if (expect_false (ev_is_active (w)))
1515	return;
1516
1517	ev_start (EV_A_ (W)w, ++checkcnt);
1518	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
1519	checks [checkcnt - 1] = w;
1520	}
1521
1522	void
1523	ev_check_stop (EV_P_ struct ev_check *w)
1524	{
1525	ev_clear_pending (EV_A_ (W)w);
1526	if (expect_false (!ev_is_active (w)))
1527	return;
1528
1529	checks [((W)w)->active - 1] = checks [--checkcnt];
1530	ev_stop (EV_A_ (W)w);
1531	}
1532
1533	#ifndef SA_RESTART
1534	# define SA_RESTART 0
1535	#endif
1536
1537	void
1538	ev_signal_start (EV_P_ struct ev_signal *w)
1539	{
1540	#if EV_MULTIPLICITY
1541	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1542	#endif
1543	if (expect_false (ev_is_active (w)))
1544	return;
1545
1546	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2336	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1547		2337
		2338	evpipe_init (EV_A);
		2339
		2340	EV_FREQUENT_CHECK;
		2341
		2342	{
		2343	#ifndef _WIN32
		2344	sigset_t full, prev;
		2345	sigfillset (&full);
		2346	sigprocmask (SIG_SETMASK, &full, &prev);
		2347	#endif
		2348
		2349	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2350
		2351	#ifndef _WIN32
		2352	sigprocmask (SIG_SETMASK, &prev, 0);
		2353	#endif
		2354	}
		2355
1548	ev_start (EV_A_ (W)w, 1);	2356	ev_start (EV_A_ (W)w, 1);
1549	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1550	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2357	wlist_add (&signals [w->signum - 1].head, (WL)w);
1551		2358
1552	if (!((WL)w)->next)	2359	if (!((WL)w)->next)
1553	{	2360	{
1554	#if _WIN32	2361	#if _WIN32
1555	signal (w->signum, sighandler);	2362	signal (w->signum, ev_sighandler);
1556	#else	2363	#else
1557	struct sigaction sa;	2364	struct sigaction sa;
1558	sa.sa_handler = sighandler;	2365	sa.sa_handler = ev_sighandler;
1559	sigfillset (&sa.sa_mask);	2366	sigfillset (&sa.sa_mask);
1560	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2367	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1561	sigaction (w->signum, &sa, 0);	2368	sigaction (w->signum, &sa, 0);
1562	#endif	2369	#endif
1563	}	2370	}
1564	}
1565		2371
1566	void	2372	EV_FREQUENT_CHECK;
		2373	}
		2374
		2375	void noinline
1567	ev_signal_stop (EV_P_ struct ev_signal *w)	2376	ev_signal_stop (EV_P_ ev_signal *w)
1568	{	2377	{
1569	ev_clear_pending (EV_A_ (W)w);	2378	clear_pending (EV_A_ (W)w);
1570	if (expect_false (!ev_is_active (w)))	2379	if (expect_false (!ev_is_active (w)))
1571	return;	2380	return;
1572		2381
		2382	EV_FREQUENT_CHECK;
		2383
1573	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2384	wlist_del (&signals [w->signum - 1].head, (WL)w);
1574	ev_stop (EV_A_ (W)w);	2385	ev_stop (EV_A_ (W)w);
1575		2386
1576	if (!signals [w->signum - 1].head)	2387	if (!signals [w->signum - 1].head)
1577	signal (w->signum, SIG_DFL);	2388	signal (w->signum, SIG_DFL);
1578	}
1579		2389
		2390	EV_FREQUENT_CHECK;
		2391	}
		2392
1580	void	2393	void
1581	ev_child_start (EV_P_ struct ev_child *w)	2394	ev_child_start (EV_P_ ev_child *w)
1582	{	2395	{
1583	#if EV_MULTIPLICITY	2396	#if EV_MULTIPLICITY
1584	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2397	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1585	#endif	2398	#endif
1586	if (expect_false (ev_is_active (w)))	2399	if (expect_false (ev_is_active (w)))
1587	return;	2400	return;
1588		2401
		2402	EV_FREQUENT_CHECK;
		2403
1589	ev_start (EV_A_ (W)w, 1);	2404	ev_start (EV_A_ (W)w, 1);
1590	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2405	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1591	}
1592		2406
		2407	EV_FREQUENT_CHECK;
		2408	}
		2409
1593	void	2410	void
1594	ev_child_stop (EV_P_ struct ev_child *w)	2411	ev_child_stop (EV_P_ ev_child *w)
1595	{	2412	{
1596	ev_clear_pending (EV_A_ (W)w);	2413	clear_pending (EV_A_ (W)w);
1597	if (expect_false (!ev_is_active (w)))	2414	if (expect_false (!ev_is_active (w)))
1598	return;	2415	return;
1599		2416
		2417	EV_FREQUENT_CHECK;
		2418
1600	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2419	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1601	ev_stop (EV_A_ (W)w);	2420	ev_stop (EV_A_ (W)w);
		2421
		2422	EV_FREQUENT_CHECK;
1602	}	2423	}
		2424
		2425	#if EV_STAT_ENABLE
		2426
		2427	# ifdef _WIN32
		2428	# undef lstat
		2429	# define lstat(a,b) _stati64 (a,b)
		2430	# endif
		2431
		2432	#define DEF_STAT_INTERVAL 5.0074891
		2433	#define MIN_STAT_INTERVAL 0.1074891
		2434
		2435	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2436
		2437	#if EV_USE_INOTIFY
		2438	# define EV_INOTIFY_BUFSIZE 8192
		2439
		2440	static void noinline
		2441	infy_add (EV_P_ ev_stat *w)
		2442	{
		2443	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);
		2444
		2445	if (w->wd < 0)
		2446	{
		2447	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2448
		2449	/* monitor some parent directory for speedup hints */
		2450	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2451	/* but an efficiency issue only */
		2452	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2453	{
		2454	char path [4096];
		2455	strcpy (path, w->path);
		2456
		2457	do
		2458	{
		2459	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2460	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2461
		2462	char *pend = strrchr (path, '/');
		2463
		2464	if (!pend)
		2465	break; /* whoops, no '/', complain to your admin */
		2466
		2467	*pend = 0;
		2468	w->wd = inotify_add_watch (fs_fd, path, mask);
		2469	}
		2470	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2471	}
		2472	}
		2473	else
		2474	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2475
		2476	if (w->wd >= 0)
		2477	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2478	}
		2479
		2480	static void noinline
		2481	infy_del (EV_P_ ev_stat *w)
		2482	{
		2483	int slot;
		2484	int wd = w->wd;
		2485
		2486	if (wd < 0)
		2487	return;
		2488
		2489	w->wd = -2;
		2490	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2491	wlist_del (&fs_hash [slot].head, (WL)w);
		2492
		2493	/* remove this watcher, if others are watching it, they will rearm */
		2494	inotify_rm_watch (fs_fd, wd);
		2495	}
		2496
		2497	static void noinline
		2498	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2499	{
		2500	if (slot < 0)
		2501	/* overflow, need to check for all hahs slots */
		2502	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2503	infy_wd (EV_A_ slot, wd, ev);
		2504	else
		2505	{
		2506	WL w_;
		2507
		2508	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2509	{
		2510	ev_stat *w = (ev_stat *)w_;
		2511	w_ = w_->next; /* lets us remove this watcher and all before it */
		2512
		2513	if (w->wd == wd || wd == -1)
		2514	{
		2515	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2516	{
		2517	w->wd = -1;
		2518	infy_add (EV_A_ w); /* re-add, no matter what */
		2519	}
		2520
		2521	stat_timer_cb (EV_A_ &w->timer, 0);
		2522	}
		2523	}
		2524	}
		2525	}
		2526
		2527	static void
		2528	infy_cb (EV_P_ ev_io *w, int revents)
		2529	{
		2530	char buf [EV_INOTIFY_BUFSIZE];
		2531	struct inotify_event *ev = (struct inotify_event *)buf;
		2532	int ofs;
		2533	int len = read (fs_fd, buf, sizeof (buf));
		2534
		2535	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2536	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2537	}
		2538
		2539	void inline_size
		2540	infy_init (EV_P)
		2541	{
		2542	if (fs_fd != -2)
		2543	return;
		2544
		2545	fs_fd = inotify_init ();
		2546
		2547	if (fs_fd >= 0)
		2548	{
		2549	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2550	ev_set_priority (&fs_w, EV_MAXPRI);
		2551	ev_io_start (EV_A_ &fs_w);
		2552	}
		2553	}
		2554
		2555	void inline_size
		2556	infy_fork (EV_P)
		2557	{
		2558	int slot;
		2559
		2560	if (fs_fd < 0)
		2561	return;
		2562
		2563	close (fs_fd);
		2564	fs_fd = inotify_init ();
		2565
		2566	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2567	{
		2568	WL w_ = fs_hash [slot].head;
		2569	fs_hash [slot].head = 0;
		2570
		2571	while (w_)
		2572	{
		2573	ev_stat *w = (ev_stat *)w_;
		2574	w_ = w_->next; /* lets us add this watcher */
		2575
		2576	w->wd = -1;
		2577
		2578	if (fs_fd >= 0)
		2579	infy_add (EV_A_ w); /* re-add, no matter what */
		2580	else
		2581	ev_timer_start (EV_A_ &w->timer);
		2582	}
		2583
		2584	}
		2585	}
		2586
		2587	#endif
		2588
		2589	#ifdef _WIN32
		2590	# define EV_LSTAT(p,b) _stati64 (p, b)
		2591	#else
		2592	# define EV_LSTAT(p,b) lstat (p, b)
		2593	#endif
		2594
		2595	void
		2596	ev_stat_stat (EV_P_ ev_stat *w)
		2597	{
		2598	if (lstat (w->path, &w->attr) < 0)
		2599	w->attr.st_nlink = 0;
		2600	else if (!w->attr.st_nlink)
		2601	w->attr.st_nlink = 1;
		2602	}
		2603
		2604	static void noinline
		2605	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2606	{
		2607	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2608
		2609	/* we copy this here each the time so that */
		2610	/* prev has the old value when the callback gets invoked */
		2611	w->prev = w->attr;
		2612	ev_stat_stat (EV_A_ w);
		2613
		2614	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2615	if (
		2616	w->prev.st_dev != w->attr.st_dev
		2617	|| w->prev.st_ino != w->attr.st_ino
		2618	|| w->prev.st_mode != w->attr.st_mode
		2619	|| w->prev.st_nlink != w->attr.st_nlink
		2620	|| w->prev.st_uid != w->attr.st_uid
		2621	|| w->prev.st_gid != w->attr.st_gid
		2622	|| w->prev.st_rdev != w->attr.st_rdev
		2623	|| w->prev.st_size != w->attr.st_size
		2624	|| w->prev.st_atime != w->attr.st_atime
		2625	|| w->prev.st_mtime != w->attr.st_mtime
		2626	|| w->prev.st_ctime != w->attr.st_ctime
		2627	) {
		2628	#if EV_USE_INOTIFY
		2629	infy_del (EV_A_ w);
		2630	infy_add (EV_A_ w);
		2631	ev_stat_stat (EV_A_ w); /* avoid race... */
		2632	#endif
		2633
		2634	ev_feed_event (EV_A_ w, EV_STAT);
		2635	}
		2636	}
		2637
		2638	void
		2639	ev_stat_start (EV_P_ ev_stat *w)
		2640	{
		2641	if (expect_false (ev_is_active (w)))
		2642	return;
		2643
		2644	/* since we use memcmp, we need to clear any padding data etc. */
		2645	memset (&w->prev, 0, sizeof (ev_statdata));
		2646	memset (&w->attr, 0, sizeof (ev_statdata));
		2647
		2648	ev_stat_stat (EV_A_ w);
		2649
		2650	if (w->interval < MIN_STAT_INTERVAL)
		2651	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2652
		2653	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2654	ev_set_priority (&w->timer, ev_priority (w));
		2655
		2656	#if EV_USE_INOTIFY
		2657	infy_init (EV_A);
		2658
		2659	if (fs_fd >= 0)
		2660	infy_add (EV_A_ w);
		2661	else
		2662	#endif
		2663	ev_timer_start (EV_A_ &w->timer);
		2664
		2665	ev_start (EV_A_ (W)w, 1);
		2666
		2667	EV_FREQUENT_CHECK;
		2668	}
		2669
		2670	void
		2671	ev_stat_stop (EV_P_ ev_stat *w)
		2672	{
		2673	clear_pending (EV_A_ (W)w);
		2674	if (expect_false (!ev_is_active (w)))
		2675	return;
		2676
		2677	EV_FREQUENT_CHECK;
		2678
		2679	#if EV_USE_INOTIFY
		2680	infy_del (EV_A_ w);
		2681	#endif
		2682	ev_timer_stop (EV_A_ &w->timer);
		2683
		2684	ev_stop (EV_A_ (W)w);
		2685
		2686	EV_FREQUENT_CHECK;
		2687	}
		2688	#endif
		2689
		2690	#if EV_IDLE_ENABLE
		2691	void
		2692	ev_idle_start (EV_P_ ev_idle *w)
		2693	{
		2694	if (expect_false (ev_is_active (w)))
		2695	return;
		2696
		2697	pri_adjust (EV_A_ (W)w);
		2698
		2699	EV_FREQUENT_CHECK;
		2700
		2701	{
		2702	int active = ++idlecnt [ABSPRI (w)];
		2703
		2704	++idleall;
		2705	ev_start (EV_A_ (W)w, active);
		2706
		2707	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2708	idles [ABSPRI (w)][active - 1] = w;
		2709	}
		2710
		2711	EV_FREQUENT_CHECK;
		2712	}
		2713
		2714	void
		2715	ev_idle_stop (EV_P_ ev_idle *w)
		2716	{
		2717	clear_pending (EV_A_ (W)w);
		2718	if (expect_false (!ev_is_active (w)))
		2719	return;
		2720
		2721	EV_FREQUENT_CHECK;
		2722
		2723	{
		2724	int active = ev_active (w);
		2725
		2726	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2727	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2728
		2729	ev_stop (EV_A_ (W)w);
		2730	--idleall;
		2731	}
		2732
		2733	EV_FREQUENT_CHECK;
		2734	}
		2735	#endif
		2736
		2737	void
		2738	ev_prepare_start (EV_P_ ev_prepare *w)
		2739	{
		2740	if (expect_false (ev_is_active (w)))
		2741	return;
		2742
		2743	EV_FREQUENT_CHECK;
		2744
		2745	ev_start (EV_A_ (W)w, ++preparecnt);
		2746	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2747	prepares [preparecnt - 1] = w;
		2748
		2749	EV_FREQUENT_CHECK;
		2750	}
		2751
		2752	void
		2753	ev_prepare_stop (EV_P_ ev_prepare *w)
		2754	{
		2755	clear_pending (EV_A_ (W)w);
		2756	if (expect_false (!ev_is_active (w)))
		2757	return;
		2758
		2759	EV_FREQUENT_CHECK;
		2760
		2761	{
		2762	int active = ev_active (w);
		2763
		2764	prepares [active - 1] = prepares [--preparecnt];
		2765	ev_active (prepares [active - 1]) = active;
		2766	}
		2767
		2768	ev_stop (EV_A_ (W)w);
		2769
		2770	EV_FREQUENT_CHECK;
		2771	}
		2772
		2773	void
		2774	ev_check_start (EV_P_ ev_check *w)
		2775	{
		2776	if (expect_false (ev_is_active (w)))
		2777	return;
		2778
		2779	EV_FREQUENT_CHECK;
		2780
		2781	ev_start (EV_A_ (W)w, ++checkcnt);
		2782	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2783	checks [checkcnt - 1] = w;
		2784
		2785	EV_FREQUENT_CHECK;
		2786	}
		2787
		2788	void
		2789	ev_check_stop (EV_P_ ev_check *w)
		2790	{
		2791	clear_pending (EV_A_ (W)w);
		2792	if (expect_false (!ev_is_active (w)))
		2793	return;
		2794
		2795	EV_FREQUENT_CHECK;
		2796
		2797	{
		2798	int active = ev_active (w);
		2799
		2800	checks [active - 1] = checks [--checkcnt];
		2801	ev_active (checks [active - 1]) = active;
		2802	}
		2803
		2804	ev_stop (EV_A_ (W)w);
		2805
		2806	EV_FREQUENT_CHECK;
		2807	}
		2808
		2809	#if EV_EMBED_ENABLE
		2810	void noinline
		2811	ev_embed_sweep (EV_P_ ev_embed *w)
		2812	{
		2813	ev_loop (w->other, EVLOOP_NONBLOCK);
		2814	}
		2815
		2816	static void
		2817	embed_io_cb (EV_P_ ev_io *io, int revents)
		2818	{
		2819	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2820
		2821	if (ev_cb (w))
		2822	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2823	else
		2824	ev_loop (w->other, EVLOOP_NONBLOCK);
		2825	}
		2826
		2827	static void
		2828	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2829	{
		2830	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2831
		2832	{
		2833	struct ev_loop *loop = w->other;
		2834
		2835	while (fdchangecnt)
		2836	{
		2837	fd_reify (EV_A);
		2838	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2839	}
		2840	}
		2841	}
		2842
		2843	static void
		2844	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
		2845	{
		2846	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
		2847
		2848	{
		2849	struct ev_loop *loop = w->other;
		2850
		2851	ev_loop_fork (EV_A);
		2852	}
		2853	}
		2854
		2855	#if 0
		2856	static void
		2857	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2858	{
		2859	ev_idle_stop (EV_A_ idle);
		2860	}
		2861	#endif
		2862
		2863	void
		2864	ev_embed_start (EV_P_ ev_embed *w)
		2865	{
		2866	if (expect_false (ev_is_active (w)))
		2867	return;
		2868
		2869	{
		2870	struct ev_loop *loop = w->other;
		2871	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2872	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2873	}
		2874
		2875	EV_FREQUENT_CHECK;
		2876
		2877	ev_set_priority (&w->io, ev_priority (w));
		2878	ev_io_start (EV_A_ &w->io);
		2879
		2880	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2881	ev_set_priority (&w->prepare, EV_MINPRI);
		2882	ev_prepare_start (EV_A_ &w->prepare);
		2883
		2884	ev_fork_init (&w->fork, embed_fork_cb);
		2885	ev_fork_start (EV_A_ &w->fork);
		2886
		2887	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2888
		2889	ev_start (EV_A_ (W)w, 1);
		2890
		2891	EV_FREQUENT_CHECK;
		2892	}
		2893
		2894	void
		2895	ev_embed_stop (EV_P_ ev_embed *w)
		2896	{
		2897	clear_pending (EV_A_ (W)w);
		2898	if (expect_false (!ev_is_active (w)))
		2899	return;
		2900
		2901	EV_FREQUENT_CHECK;
		2902
		2903	ev_io_stop (EV_A_ &w->io);
		2904	ev_prepare_stop (EV_A_ &w->prepare);
		2905	ev_fork_stop (EV_A_ &w->fork);
		2906
		2907	EV_FREQUENT_CHECK;
		2908	}
		2909	#endif
		2910
		2911	#if EV_FORK_ENABLE
		2912	void
		2913	ev_fork_start (EV_P_ ev_fork *w)
		2914	{
		2915	if (expect_false (ev_is_active (w)))
		2916	return;
		2917
		2918	EV_FREQUENT_CHECK;
		2919
		2920	ev_start (EV_A_ (W)w, ++forkcnt);
		2921	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2922	forks [forkcnt - 1] = w;
		2923
		2924	EV_FREQUENT_CHECK;
		2925	}
		2926
		2927	void
		2928	ev_fork_stop (EV_P_ ev_fork *w)
		2929	{
		2930	clear_pending (EV_A_ (W)w);
		2931	if (expect_false (!ev_is_active (w)))
		2932	return;
		2933
		2934	EV_FREQUENT_CHECK;
		2935
		2936	{
		2937	int active = ev_active (w);
		2938
		2939	forks [active - 1] = forks [--forkcnt];
		2940	ev_active (forks [active - 1]) = active;
		2941	}
		2942
		2943	ev_stop (EV_A_ (W)w);
		2944
		2945	EV_FREQUENT_CHECK;
		2946	}
		2947	#endif
		2948
		2949	#if EV_ASYNC_ENABLE
		2950	void
		2951	ev_async_start (EV_P_ ev_async *w)
		2952	{
		2953	if (expect_false (ev_is_active (w)))
		2954	return;
		2955
		2956	evpipe_init (EV_A);
		2957
		2958	EV_FREQUENT_CHECK;
		2959
		2960	ev_start (EV_A_ (W)w, ++asynccnt);
		2961	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2962	asyncs [asynccnt - 1] = w;
		2963
		2964	EV_FREQUENT_CHECK;
		2965	}
		2966
		2967	void
		2968	ev_async_stop (EV_P_ ev_async *w)
		2969	{
		2970	clear_pending (EV_A_ (W)w);
		2971	if (expect_false (!ev_is_active (w)))
		2972	return;
		2973
		2974	EV_FREQUENT_CHECK;
		2975
		2976	{
		2977	int active = ev_active (w);
		2978
		2979	asyncs [active - 1] = asyncs [--asynccnt];
		2980	ev_active (asyncs [active - 1]) = active;
		2981	}
		2982
		2983	ev_stop (EV_A_ (W)w);
		2984
		2985	EV_FREQUENT_CHECK;
		2986	}
		2987
		2988	void
		2989	ev_async_send (EV_P_ ev_async *w)
		2990	{
		2991	w->sent = 1;
		2992	evpipe_write (EV_A_ &gotasync);
		2993	}
		2994	#endif
1603		2995
1604	/*****************************************************************************/	2996	/*****************************************************************************/
1605		2997
1606	struct ev_once	2998	struct ev_once
1607	{	2999	{
1608	struct ev_io io;	3000	ev_io io;
1609	struct ev_timer to;	3001	ev_timer to;
1610	void (*cb)(int revents, void *arg);	3002	void (*cb)(int revents, void *arg);
1611	void *arg;	3003	void *arg;
1612	};	3004	};
1613		3005
1614	static void	3006	static void
1615	once_cb (EV_P_ struct ev_once *once, int revents)	3007	once_cb (EV_P_ struct ev_once *once, int revents)
1616	{	3008	{
1617	void (*cb)(int revents, void *arg) = once->cb;	3009	void (*cb)(int revents, void *arg) = once->cb;
1618	void *arg = once->arg;	3010	void *arg = once->arg;
1619		3011
1620	ev_io_stop (EV_A_ &once->io);	3012	ev_io_stop (EV_A_ &once->io);
1621	ev_timer_stop (EV_A_ &once->to);	3013	ev_timer_stop (EV_A_ &once->to);
1622	ev_free (once);	3014	ev_free (once);
1623		3015
1624	cb (revents, arg);	3016	cb (revents, arg);
1625	}	3017	}
1626		3018
1627	static void	3019	static void
1628	once_cb_io (EV_P_ struct ev_io *w, int revents)	3020	once_cb_io (EV_P_ ev_io *w, int revents)
1629	{	3021	{
1630	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	3022	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
		3023
		3024	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1631	}	3025	}
1632		3026
1633	static void	3027	static void
1634	once_cb_to (EV_P_ struct ev_timer *w, int revents)	3028	once_cb_to (EV_P_ ev_timer *w, int revents)
1635	{	3029	{
1636	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	3030	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
		3031
		3032	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1637	}	3033	}
1638		3034
1639	void	3035	void
1640	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	3036	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1641	{	3037	{
…		…
1663	ev_timer_set (&once->to, timeout, 0.);	3059	ev_timer_set (&once->to, timeout, 0.);
1664	ev_timer_start (EV_A_ &once->to);	3060	ev_timer_start (EV_A_ &once->to);
1665	}	3061	}
1666	}	3062	}
1667		3063
		3064	#if EV_MULTIPLICITY
		3065	#include "ev_wrap.h"
		3066	#endif
		3067
1668	#ifdef __cplusplus	3068	#ifdef __cplusplus
1669	}	3069	}
1670	#endif	3070	#endif
1671		3071

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