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Comparing libev/ev.c (file contents):
Revision 1.140 by root, Mon Nov 26 19:49:36 2007 UTC vs.
Revision 1.272 by root, Mon Nov 3 12:17:40 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
37	# ifdef EV_CONFIG_H	46	# ifdef EV_CONFIG_H
38	# include EV_CONFIG_H	47	# include EV_CONFIG_H
39	# else	48	# else
40	# include "config.h"	49	# include "config.h"
…		…
51	# ifndef EV_USE_MONOTONIC	60	# ifndef EV_USE_MONOTONIC
52	# define EV_USE_MONOTONIC 0	61	# define EV_USE_MONOTONIC 0
53	# endif	62	# endif
54	# ifndef EV_USE_REALTIME	63	# ifndef EV_USE_REALTIME
55	# define EV_USE_REALTIME 0	64	# define EV_USE_REALTIME 0
		65	# endif
		66	# endif
		67
		68	# ifndef EV_USE_NANOSLEEP
		69	# if HAVE_NANOSLEEP
		70	# define EV_USE_NANOSLEEP 1
		71	# else
		72	# define EV_USE_NANOSLEEP 0
56	# endif	73	# endif
57	# endif	74	# endif
58		75
59	# ifndef EV_USE_SELECT	76	# ifndef EV_USE_SELECT
60	# if HAVE_SELECT && HAVE_SYS_SELECT_H	77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
…		…
94	# else	111	# else
95	# define EV_USE_PORT 0	112	# define EV_USE_PORT 0
96	# endif	113	# endif
97	# endif	114	# endif
98		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
99	#endif	132	#endif
100		133
101	#include <math.h>	134	#include <math.h>
102	#include <stdlib.h>	135	#include <stdlib.h>
103	#include <fcntl.h>	136	#include <fcntl.h>
…		…
109	#include <errno.h>	142	#include <errno.h>
110	#include <sys/types.h>	143	#include <sys/types.h>
111	#include <time.h>	144	#include <time.h>
112		145
113	#include <signal.h>	146	#include <signal.h>
		147
		148	#ifdef EV_H
		149	# include EV_H
		150	#else
		151	# include "ev.h"
		152	#endif
114		153
115	#ifndef _WIN32	154	#ifndef _WIN32
116	# include <sys/time.h>	155	# include <sys/time.h>
117	# include <sys/wait.h>	156	# include <sys/wait.h>
118	# include <unistd.h>	157	# include <unistd.h>
119	#else	158	#else
		159	# include <io.h>
120	# define WIN32_LEAN_AND_MEAN	160	# define WIN32_LEAN_AND_MEAN
121	# include <windows.h>	161	# include <windows.h>
122	# ifndef EV_SELECT_IS_WINSOCKET	162	# ifndef EV_SELECT_IS_WINSOCKET
123	# define EV_SELECT_IS_WINSOCKET 1	163	# define EV_SELECT_IS_WINSOCKET 1
124	# endif	164	# endif
125	#endif	165	#endif
126		166
127	/**/	167	/* this block tries to deduce configuration from header-defined symbols and defaults */
128		168
129	#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
130	# define EV_USE_MONOTONIC 0	173	# define EV_USE_MONOTONIC 0
		174	# endif
131	#endif	175	#endif
132		176
133	#ifndef EV_USE_REALTIME	177	#ifndef EV_USE_REALTIME
134	# 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
135	#endif	187	#endif
136		188
137	#ifndef EV_USE_SELECT	189	#ifndef EV_USE_SELECT
138	# define EV_USE_SELECT 1	190	# define EV_USE_SELECT 1
139	#endif	191	#endif
…		…
145	# define EV_USE_POLL 1	197	# define EV_USE_POLL 1
146	# endif	198	# endif
147	#endif	199	#endif
148		200
149	#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
150	# define EV_USE_EPOLL 0	205	# define EV_USE_EPOLL 0
		206	# endif
151	#endif	207	#endif
152		208
153	#ifndef EV_USE_KQUEUE	209	#ifndef EV_USE_KQUEUE
154	# define EV_USE_KQUEUE 0	210	# define EV_USE_KQUEUE 0
155	#endif	211	#endif
156		212
157	#ifndef EV_USE_PORT	213	#ifndef EV_USE_PORT
158	# define EV_USE_PORT 0	214	# define EV_USE_PORT 0
159	#endif	215	#endif
160		216
161	/**/	217	#ifndef EV_USE_INOTIFY
		218	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		219	# define EV_USE_INOTIFY 1
		220	# else
		221	# define EV_USE_INOTIFY 0
		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 */
162		268
163	#ifndef CLOCK_MONOTONIC	269	#ifndef CLOCK_MONOTONIC
164	# undef EV_USE_MONOTONIC	270	# undef EV_USE_MONOTONIC
165	# define EV_USE_MONOTONIC 0	271	# define EV_USE_MONOTONIC 0
166	#endif	272	#endif
…		…
168	#ifndef CLOCK_REALTIME	274	#ifndef CLOCK_REALTIME
169	# undef EV_USE_REALTIME	275	# undef EV_USE_REALTIME
170	# define EV_USE_REALTIME 0	276	# define EV_USE_REALTIME 0
171	#endif	277	#endif
172		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/utsname.h>
		292	# include <sys/inotify.h>
		293	/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
		294	# ifndef IN_DONT_FOLLOW
		295	# undef EV_USE_INOTIFY
		296	# define EV_USE_INOTIFY 0
		297	# endif
		298	#endif
		299
173	#if EV_SELECT_IS_WINSOCKET	300	#if EV_SELECT_IS_WINSOCKET
174	# include <winsock.h>	301	# include <winsock.h>
175	#endif	302	#endif
176		303
		304	#if EV_USE_EVENTFD
		305	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		306	# include <stdint.h>
		307	# ifdef __cplusplus
		308	extern "C" {
		309	# endif
		310	int eventfd (unsigned int initval, int flags);
		311	# ifdef __cplusplus
		312	}
		313	# endif
		314	#endif
		315
177	/**/	316	/**/
		317
		318	#if EV_VERIFY >= 3
		319	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
		320	#else
		321	# define EV_FREQUENT_CHECK do { } while (0)
		322	#endif
		323
		324	/*
		325	* This is used to avoid floating point rounding problems.
		326	* It is added to ev_rt_now when scheduling periodics
		327	* to ensure progress, time-wise, even when rounding
		328	* errors are against us.
		329	* This value is good at least till the year 4000.
		330	* Better solutions welcome.
		331	*/
		332	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
178		333
179	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	334	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
180	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	335	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
181	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
182	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	336	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
183		337
184	#ifdef EV_H
185	# include EV_H
186	#else
187	# include "ev.h"
188	#endif
189
190	#if __GNUC__ >= 3	338	#if __GNUC__ >= 4
191	# define expect(expr,value) __builtin_expect ((expr),(value))	339	# define expect(expr,value) __builtin_expect ((expr),(value))
192	# define inline_size static inline /* inline for codesize */
193	# if EV_MINIMAL
194	# define noinline __attribute__ ((noinline))	340	# define noinline __attribute__ ((noinline))
195	# define inline_speed static noinline
196	# else
197	# define noinline
198	# define inline_speed static inline
199	# endif
200	#else	341	#else
201	# define expect(expr,value) (expr)	342	# define expect(expr,value) (expr)
202	# define inline_speed static
203	# define inline_minimal static
204	# define noinline	343	# define noinline
		344	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		345	# define inline
		346	# endif
205	#endif	347	#endif
206		348
207	#define expect_false(expr) expect ((expr) != 0, 0)	349	#define expect_false(expr) expect ((expr) != 0, 0)
208	#define expect_true(expr) expect ((expr) != 0, 1)	350	#define expect_true(expr) expect ((expr) != 0, 1)
		351	#define inline_size static inline
		352
		353	#if EV_MINIMAL
		354	# define inline_speed static noinline
		355	#else
		356	# define inline_speed static inline
		357	#endif
209		358
210	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	359	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
211	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	360	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
212		361
213	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */	362	#define EMPTY /* required for microsofts broken pseudo-c compiler */
214	#define EMPTY2(a,b) /* used to suppress some warnings */	363	#define EMPTY2(a,b) /* used to suppress some warnings */
215		364
216	typedef ev_watcher *W;	365	typedef ev_watcher *W;
217	typedef ev_watcher_list *WL;	366	typedef ev_watcher_list *WL;
218	typedef ev_watcher_time *WT;	367	typedef ev_watcher_time *WT;
219		368
		369	#define ev_active(w) ((W)(w))->active
		370	#define ev_at(w) ((WT)(w))->at
		371
		372	#if EV_USE_MONOTONIC
		373	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		374	/* giving it a reasonably high chance of working on typical architetcures */
220	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	375	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		376	#endif
221		377
222	#ifdef _WIN32	378	#ifdef _WIN32
223	# include "ev_win32.c"	379	# include "ev_win32.c"
224	#endif	380	#endif
225		381
226	/*****************************************************************************/	382	/*****************************************************************************/
227		383
228	static void (*syserr_cb)(const char *msg);	384	static void (*syserr_cb)(const char *msg);
229		385
		386	void
230	void ev_set_syserr_cb (void (*cb)(const char *msg))	387	ev_set_syserr_cb (void (*cb)(const char *msg))
231	{	388	{
232	syserr_cb = cb;	389	syserr_cb = cb;
233	}	390	}
234		391
235	static void	392	static void noinline
236	syserr (const char *msg)	393	ev_syserr (const char *msg)
237	{	394	{
238	if (!msg)	395	if (!msg)
239	msg = "(libev) system error";	396	msg = "(libev) system error";
240		397
241	if (syserr_cb)	398	if (syserr_cb)
…		…
245	perror (msg);	402	perror (msg);
246	abort ();	403	abort ();
247	}	404	}
248	}	405	}
249		406
		407	static void *
		408	ev_realloc_emul (void *ptr, long size)
		409	{
		410	/* some systems, notably openbsd and darwin, fail to properly
		411	* implement realloc (x, 0) (as required by both ansi c-98 and
		412	* the single unix specification, so work around them here.
		413	*/
		414
		415	if (size)
		416	return realloc (ptr, size);
		417
		418	free (ptr);
		419	return 0;
		420	}
		421
250	static void *(*alloc)(void *ptr, long size);	422	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
251		423
		424	void
252	void ev_set_allocator (void *(*cb)(void *ptr, long size))	425	ev_set_allocator (void *(*cb)(void *ptr, long size))
253	{	426	{
254	alloc = cb;	427	alloc = cb;
255	}	428	}
256		429
257	static void *	430	inline_speed void *
258	ev_realloc (void *ptr, long size)	431	ev_realloc (void *ptr, long size)
259	{	432	{
260	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	433	ptr = alloc (ptr, size);
261		434
262	if (!ptr && size)	435	if (!ptr && size)
263	{	436	{
264	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	437	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
265	abort ();	438	abort ();
…		…
276	typedef struct	449	typedef struct
277	{	450	{
278	WL head;	451	WL head;
279	unsigned char events;	452	unsigned char events;
280	unsigned char reify;	453	unsigned char reify;
		454	unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
		455	unsigned char unused;
		456	#if EV_USE_EPOLL
		457	unsigned int egen; /* generation counter to counter epoll bugs */
		458	#endif
281	#if EV_SELECT_IS_WINSOCKET	459	#if EV_SELECT_IS_WINSOCKET
282	SOCKET handle;	460	SOCKET handle;
283	#endif	461	#endif
284	} ANFD;	462	} ANFD;
285		463
286	typedef struct	464	typedef struct
287	{	465	{
288	W w;	466	W w;
289	int events;	467	int events;
290	} ANPENDING;	468	} ANPENDING;
		469
		470	#if EV_USE_INOTIFY
		471	/* hash table entry per inotify-id */
		472	typedef struct
		473	{
		474	WL head;
		475	} ANFS;
		476	#endif
		477
		478	/* Heap Entry */
		479	#if EV_HEAP_CACHE_AT
		480	typedef struct {
		481	ev_tstamp at;
		482	WT w;
		483	} ANHE;
		484
		485	#define ANHE_w(he) (he).w /* access watcher, read-write */
		486	#define ANHE_at(he) (he).at /* access cached at, read-only */
		487	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
		488	#else
		489	typedef WT ANHE;
		490
		491	#define ANHE_w(he) (he)
		492	#define ANHE_at(he) (he)->at
		493	#define ANHE_at_cache(he)
		494	#endif
291		495
292	#if EV_MULTIPLICITY	496	#if EV_MULTIPLICITY
293		497
294	struct ev_loop	498	struct ev_loop
295	{	499	{
…		…
315		519
316	#endif	520	#endif
317		521
318	/*****************************************************************************/	522	/*****************************************************************************/
319		523
320	ev_tstamp noinline	524	ev_tstamp
321	ev_time (void)	525	ev_time (void)
322	{	526	{
323	#if EV_USE_REALTIME	527	#if EV_USE_REALTIME
324	struct timespec ts;	528	struct timespec ts;
325	clock_gettime (CLOCK_REALTIME, &ts);	529	clock_gettime (CLOCK_REALTIME, &ts);
…		…
352	{	556	{
353	return ev_rt_now;	557	return ev_rt_now;
354	}	558	}
355	#endif	559	#endif
356		560
357	#define array_roundsize(type,n) (((n) | 4) & ~3)	561	void
		562	ev_sleep (ev_tstamp delay)
		563	{
		564	if (delay > 0.)
		565	{
		566	#if EV_USE_NANOSLEEP
		567	struct timespec ts;
		568
		569	ts.tv_sec = (time_t)delay;
		570	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		571
		572	nanosleep (&ts, 0);
		573	#elif defined(_WIN32)
		574	Sleep ((unsigned long)(delay * 1e3));
		575	#else
		576	struct timeval tv;
		577
		578	tv.tv_sec = (time_t)delay;
		579	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		580
		581	/* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
		582	/* somehting nto guaranteed by newer posix versions, but guaranteed */
		583	/* by older ones */
		584	select (0, 0, 0, 0, &tv);
		585	#endif
		586	}
		587	}
		588
		589	/*****************************************************************************/
		590
		591	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		592
		593	int inline_size
		594	array_nextsize (int elem, int cur, int cnt)
		595	{
		596	int ncur = cur + 1;
		597
		598	do
		599	ncur <<= 1;
		600	while (cnt > ncur);
		601
		602	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		603	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
		604	{
		605	ncur *= elem;
		606	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
		607	ncur = ncur - sizeof (void *) * 4;
		608	ncur /= elem;
		609	}
		610
		611	return ncur;
		612	}
		613
		614	static noinline void *
		615	array_realloc (int elem, void *base, int *cur, int cnt)
		616	{
		617	*cur = array_nextsize (elem, *cur, cnt);
		618	return ev_realloc (base, elem * *cur);
		619	}
		620
		621	#define array_init_zero(base,count) \
		622	memset ((void *)(base), 0, sizeof (*(base)) * (count))
358		623
359	#define array_needsize(type,base,cur,cnt,init) \	624	#define array_needsize(type,base,cur,cnt,init) \
360	if (expect_false ((cnt) > cur)) \	625	if (expect_false ((cnt) > (cur))) \
361	{ \	626	{ \
362	int newcnt = cur; \	627	int ocur_ = (cur); \
363	do \	628	(base) = (type *)array_realloc \
364	{ \	629	(sizeof (type), (base), &(cur), (cnt)); \
365	newcnt = array_roundsize (type, newcnt << 1); \	630	init ((base) + (ocur_), (cur) - ocur_); \
366	} \
367	while ((cnt) > newcnt); \
368	\
369	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
370	init (base + cur, newcnt - cur); \
371	cur = newcnt; \
372	}	631	}
373		632
		633	#if 0
374	#define array_slim(type,stem) \	634	#define array_slim(type,stem) \
375	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \	635	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
376	{ \	636	{ \
377	stem ## max = array_roundsize (stem ## cnt >> 1); \	637	stem ## max = array_roundsize (stem ## cnt >> 1); \
378	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\	638	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
379	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	639	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
380	}	640	}
		641	#endif
381		642
382	#define array_free(stem, idx) \	643	#define array_free(stem, idx) \
383	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	644	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
384		645
385	/*****************************************************************************/	646	/*****************************************************************************/
386		647
387	void inline_size
388	anfds_init (ANFD *base, int count)
389	{
390	while (count--)
391	{
392	base->head = 0;
393	base->events = EV_NONE;
394	base->reify = 0;
395
396	++base;
397	}
398	}
399
400	void noinline	648	void noinline
401	ev_feed_event (EV_P_ void *w, int revents)	649	ev_feed_event (EV_P_ void *w, int revents)
402	{	650	{
403	W w_ = (W)w;	651	W w_ = (W)w;
		652	int pri = ABSPRI (w_);
404		653
405	if (expect_false (w_->pending))	654	if (expect_false (w_->pending))
		655	pendings [pri][w_->pending - 1].events |= revents;
		656	else
406	{	657	{
		658	w_->pending = ++pendingcnt [pri];
		659	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		660	pendings [pri][w_->pending - 1].w = w_;
407	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;	661	pendings [pri][w_->pending - 1].events = revents;
408	return;
409	}	662	}
410
411	w_->pending = ++pendingcnt [ABSPRI (w_)];
412	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
413	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
414	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
415	}	663	}
416		664
417	static void	665	void inline_speed
418	queue_events (EV_P_ W *events, int eventcnt, int type)	666	queue_events (EV_P_ W *events, int eventcnt, int type)
419	{	667	{
420	int i;	668	int i;
421		669
422	for (i = 0; i < eventcnt; ++i)	670	for (i = 0; i < eventcnt; ++i)
423	ev_feed_event (EV_A_ events [i], type);	671	ev_feed_event (EV_A_ events [i], type);
424	}	672	}
425		673
		674	/*****************************************************************************/
		675
426	void inline_speed	676	void inline_speed
427	fd_event (EV_P_ int fd, int revents)	677	fd_event (EV_P_ int fd, int revents)
428	{	678	{
429	ANFD *anfd = anfds + fd;	679	ANFD *anfd = anfds + fd;
430	ev_io *w;	680	ev_io *w;
…		…
439	}	689	}
440		690
441	void	691	void
442	ev_feed_fd_event (EV_P_ int fd, int revents)	692	ev_feed_fd_event (EV_P_ int fd, int revents)
443	{	693	{
		694	if (fd >= 0 && fd < anfdmax)
444	fd_event (EV_A_ fd, revents);	695	fd_event (EV_A_ fd, revents);
445	}	696	}
446
447	/*****************************************************************************/
448		697
449	void inline_size	698	void inline_size
450	fd_reify (EV_P)	699	fd_reify (EV_P)
451	{	700	{
452	int i;	701	int i;
…		…
455	{	704	{
456	int fd = fdchanges [i];	705	int fd = fdchanges [i];
457	ANFD *anfd = anfds + fd;	706	ANFD *anfd = anfds + fd;
458	ev_io *w;	707	ev_io *w;
459		708
460	int events = 0;	709	unsigned char events = 0;
461		710
462	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)	711	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
463	events |= w->events;	712	events |= (unsigned char)w->events;
464		713
465	#if EV_SELECT_IS_WINSOCKET	714	#if EV_SELECT_IS_WINSOCKET
466	if (events)	715	if (events)
467	{	716	{
468	unsigned long argp;	717	unsigned long arg;
		718	#ifdef EV_FD_TO_WIN32_HANDLE
		719	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		720	#else
469	anfd->handle = _get_osfhandle (fd);	721	anfd->handle = _get_osfhandle (fd);
		722	#endif
470	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));	723	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
471	}	724	}
472	#endif	725	#endif
473		726
		727	{
		728	unsigned char o_events = anfd->events;
		729	unsigned char o_reify = anfd->reify;
		730
474	anfd->reify = 0;	731	anfd->reify = 0;
475
476	backend_modify (EV_A_ fd, anfd->events, events);
477	anfd->events = events;	732	anfd->events = events;
		733
		734	if (o_events != events || o_reify & EV_IOFDSET)
		735	backend_modify (EV_A_ fd, o_events, events);
		736	}
478	}	737	}
479		738
480	fdchangecnt = 0;	739	fdchangecnt = 0;
481	}	740	}
482		741
483	void inline_size	742	void inline_size
484	fd_change (EV_P_ int fd)	743	fd_change (EV_P_ int fd, int flags)
485	{	744	{
486	if (expect_false (anfds [fd].reify))	745	unsigned char reify = anfds [fd].reify;
487	return;
488
489	anfds [fd].reify = 1;	746	anfds [fd].reify |= flags;
490		747
		748	if (expect_true (!reify))
		749	{
491	++fdchangecnt;	750	++fdchangecnt;
492	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	751	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
493	fdchanges [fdchangecnt - 1] = fd;	752	fdchanges [fdchangecnt - 1] = fd;
		753	}
494	}	754	}
495		755
496	void inline_speed	756	void inline_speed
497	fd_kill (EV_P_ int fd)	757	fd_kill (EV_P_ int fd)
498	{	758	{
…		…
521	{	781	{
522	int fd;	782	int fd;
523		783
524	for (fd = 0; fd < anfdmax; ++fd)	784	for (fd = 0; fd < anfdmax; ++fd)
525	if (anfds [fd].events)	785	if (anfds [fd].events)
526	if (!fd_valid (fd) == -1 && errno == EBADF)	786	if (!fd_valid (fd) && errno == EBADF)
527	fd_kill (EV_A_ fd);	787	fd_kill (EV_A_ fd);
528	}	788	}
529		789
530	/* called on ENOMEM in select/poll to kill some fds and retry */	790	/* called on ENOMEM in select/poll to kill some fds and retry */
531	static void noinline	791	static void noinline
…		…
545	static void noinline	805	static void noinline
546	fd_rearm_all (EV_P)	806	fd_rearm_all (EV_P)
547	{	807	{
548	int fd;	808	int fd;
549		809
550	/* this should be highly optimised to not do anything but set a flag */
551	for (fd = 0; fd < anfdmax; ++fd)	810	for (fd = 0; fd < anfdmax; ++fd)
552	if (anfds [fd].events)	811	if (anfds [fd].events)
553	{	812	{
554	anfds [fd].events = 0;	813	anfds [fd].events = 0;
		814	anfds [fd].emask = 0;
555	fd_change (EV_A_ fd);	815	fd_change (EV_A_ fd, EV_IOFDSET | 1);
556	}	816	}
557	}	817	}
558		818
559	/*****************************************************************************/	819	/*****************************************************************************/
560		820
		821	/*
		822	* the heap functions want a real array index. array index 0 uis guaranteed to not
		823	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		824	* the branching factor of the d-tree.
		825	*/
		826
		827	/*
		828	* at the moment we allow libev the luxury of two heaps,
		829	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		830	* which is more cache-efficient.
		831	* the difference is about 5% with 50000+ watchers.
		832	*/
		833	#if EV_USE_4HEAP
		834
		835	#define DHEAP 4
		836	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		837	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
		838	#define UPHEAP_DONE(p,k) ((p) == (k))
		839
		840	/* away from the root */
561	void inline_speed	841	void inline_speed
562	upheap (WT *heap, int k)	842	downheap (ANHE *heap, int N, int k)
563	{	843	{
564	WT w = heap [k];	844	ANHE he = heap [k];
		845	ANHE *E = heap + N + HEAP0;
565		846
566	while (k && heap [k >> 1]->at > w->at)	847	for (;;)
567	{
568	heap [k] = heap [k >> 1];
569	((W)heap [k])->active = k + 1;
570	k >>= 1;
571	}	848	{
		849	ev_tstamp minat;
		850	ANHE *minpos;
		851	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
572		852
		853	/* find minimum child */
		854	if (expect_true (pos + DHEAP - 1 < E))
		855	{
		856	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		857	if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		858	if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		859	if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		860	}
		861	else if (pos < E)
		862	{
		863	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		864	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		865	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		866	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		867	}
		868	else
		869	break;
		870
		871	if (ANHE_at (he) <= minat)
		872	break;
		873
		874	heap [k] = *minpos;
		875	ev_active (ANHE_w (*minpos)) = k;
		876
		877	k = minpos - heap;
		878	}
		879
573	heap [k] = w;	880	heap [k] = he;
574	((W)heap [k])->active = k + 1;	881	ev_active (ANHE_w (he)) = k;
575
576	}	882	}
577		883
		884	#else /* 4HEAP */
		885
		886	#define HEAP0 1
		887	#define HPARENT(k) ((k) >> 1)
		888	#define UPHEAP_DONE(p,k) (!(p))
		889
		890	/* away from the root */
578	void inline_speed	891	void inline_speed
579	downheap (WT *heap, int N, int k)	892	downheap (ANHE *heap, int N, int k)
580	{	893	{
581	WT w = heap [k];	894	ANHE he = heap [k];
582		895
583	while (k < (N >> 1))	896	for (;;)
584	{	897	{
585	int j = k << 1;	898	int c = k << 1;
586		899
587	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	900	if (c > N + HEAP0 - 1)
588	++j;
589
590	if (w->at <= heap [j]->at)
591	break;	901	break;
592		902
		903	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		904	? 1 : 0;
		905
		906	if (ANHE_at (he) <= ANHE_at (heap [c]))
		907	break;
		908
593	heap [k] = heap [j];	909	heap [k] = heap [c];
594	((W)heap [k])->active = k + 1;	910	ev_active (ANHE_w (heap [k])) = k;
		911
595	k = j;	912	k = c;
596	}	913	}
597		914
598	heap [k] = w;	915	heap [k] = he;
599	((W)heap [k])->active = k + 1;	916	ev_active (ANHE_w (he)) = k;
		917	}
		918	#endif
		919
		920	/* towards the root */
		921	void inline_speed
		922	upheap (ANHE *heap, int k)
		923	{
		924	ANHE he = heap [k];
		925
		926	for (;;)
		927	{
		928	int p = HPARENT (k);
		929
		930	if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
		931	break;
		932
		933	heap [k] = heap [p];
		934	ev_active (ANHE_w (heap [k])) = k;
		935	k = p;
		936	}
		937
		938	heap [k] = he;
		939	ev_active (ANHE_w (he)) = k;
600	}	940	}
601		941
602	void inline_size	942	void inline_size
603	adjustheap (WT *heap, int N, int k)	943	adjustheap (ANHE *heap, int N, int k)
604	{	944	{
		945	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
605	upheap (heap, k);	946	upheap (heap, k);
		947	else
606	downheap (heap, N, k);	948	downheap (heap, N, k);
		949	}
		950
		951	/* rebuild the heap: this function is used only once and executed rarely */
		952	void inline_size
		953	reheap (ANHE *heap, int N)
		954	{
		955	int i;
		956
		957	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
		958	/* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
		959	for (i = 0; i < N; ++i)
		960	upheap (heap, i + HEAP0);
607	}	961	}
608		962
609	/*****************************************************************************/	963	/*****************************************************************************/
610		964
611	typedef struct	965	typedef struct
612	{	966	{
613	WL head;	967	WL head;
614	sig_atomic_t volatile gotsig;	968	EV_ATOMIC_T gotsig;
615	} ANSIG;	969	} ANSIG;
616		970
617	static ANSIG *signals;	971	static ANSIG *signals;
618	static int signalmax;	972	static int signalmax;
619		973
620	static int sigpipe [2];	974	static EV_ATOMIC_T gotsig;
621	static sig_atomic_t volatile gotsig;
622	static ev_io sigev;
623		975
		976	/*****************************************************************************/
		977
624	void inline_size	978	void inline_speed
625	signals_init (ANSIG *base, int count)
626	{
627	while (count--)
628	{
629	base->head = 0;
630	base->gotsig = 0;
631
632	++base;
633	}
634	}
635
636	static void
637	sighandler (int signum)
638	{
639	#if _WIN32
640	signal (signum, sighandler);
641	#endif
642
643	signals [signum - 1].gotsig = 1;
644
645	if (!gotsig)
646	{
647	int old_errno = errno;
648	gotsig = 1;
649	write (sigpipe [1], &signum, 1);
650	errno = old_errno;
651	}
652	}
653
654	void noinline
655	ev_feed_signal_event (EV_P_ int signum)
656	{
657	WL w;
658
659	#if EV_MULTIPLICITY
660	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
661	#endif
662
663	--signum;
664
665	if (signum < 0 || signum >= signalmax)
666	return;
667
668	signals [signum].gotsig = 0;
669
670	for (w = signals [signum].head; w; w = w->next)
671	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
672	}
673
674	static void
675	sigcb (EV_P_ ev_io *iow, int revents)
676	{
677	int signum;
678
679	read (sigpipe [0], &revents, 1);
680	gotsig = 0;
681
682	for (signum = signalmax; signum--; )
683	if (signals [signum].gotsig)
684	ev_feed_signal_event (EV_A_ signum + 1);
685	}
686
687	void inline_size
688	fd_intern (int fd)	979	fd_intern (int fd)
689	{	980	{
690	#ifdef _WIN32	981	#ifdef _WIN32
691	int arg = 1;	982	unsigned long arg = 1;
692	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	983	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
693	#else	984	#else
694	fcntl (fd, F_SETFD, FD_CLOEXEC);	985	fcntl (fd, F_SETFD, FD_CLOEXEC);
695	fcntl (fd, F_SETFL, O_NONBLOCK);	986	fcntl (fd, F_SETFL, O_NONBLOCK);
696	#endif	987	#endif
697	}	988	}
698		989
699	static void noinline	990	static void noinline
700	siginit (EV_P)	991	evpipe_init (EV_P)
701	{	992	{
		993	if (!ev_is_active (&pipeev))
		994	{
		995	#if EV_USE_EVENTFD
		996	if ((evfd = eventfd (0, 0)) >= 0)
		997	{
		998	evpipe [0] = -1;
		999	fd_intern (evfd);
		1000	ev_io_set (&pipeev, evfd, EV_READ);
		1001	}
		1002	else
		1003	#endif
		1004	{
		1005	while (pipe (evpipe))
		1006	ev_syserr ("(libev) error creating signal/async pipe");
		1007
702	fd_intern (sigpipe [0]);	1008	fd_intern (evpipe [0]);
703	fd_intern (sigpipe [1]);	1009	fd_intern (evpipe [1]);
		1010	ev_io_set (&pipeev, evpipe [0], EV_READ);
		1011	}
704		1012
705	ev_io_set (&sigev, sigpipe [0], EV_READ);
706	ev_io_start (EV_A_ &sigev);	1013	ev_io_start (EV_A_ &pipeev);
707	ev_unref (EV_A); /* child watcher should not keep loop alive */	1014	ev_unref (EV_A); /* watcher should not keep loop alive */
		1015	}
		1016	}
		1017
		1018	void inline_size
		1019	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1020	{
		1021	if (!*flag)
		1022	{
		1023	int old_errno = errno; /* save errno because write might clobber it */
		1024
		1025	*flag = 1;
		1026
		1027	#if EV_USE_EVENTFD
		1028	if (evfd >= 0)
		1029	{
		1030	uint64_t counter = 1;
		1031	write (evfd, &counter, sizeof (uint64_t));
		1032	}
		1033	else
		1034	#endif
		1035	write (evpipe [1], &old_errno, 1);
		1036
		1037	errno = old_errno;
		1038	}
		1039	}
		1040
		1041	static void
		1042	pipecb (EV_P_ ev_io *iow, int revents)
		1043	{
		1044	#if EV_USE_EVENTFD
		1045	if (evfd >= 0)
		1046	{
		1047	uint64_t counter;
		1048	read (evfd, &counter, sizeof (uint64_t));
		1049	}
		1050	else
		1051	#endif
		1052	{
		1053	char dummy;
		1054	read (evpipe [0], &dummy, 1);
		1055	}
		1056
		1057	if (gotsig && ev_is_default_loop (EV_A))
		1058	{
		1059	int signum;
		1060	gotsig = 0;
		1061
		1062	for (signum = signalmax; signum--; )
		1063	if (signals [signum].gotsig)
		1064	ev_feed_signal_event (EV_A_ signum + 1);
		1065	}
		1066
		1067	#if EV_ASYNC_ENABLE
		1068	if (gotasync)
		1069	{
		1070	int i;
		1071	gotasync = 0;
		1072
		1073	for (i = asynccnt; i--; )
		1074	if (asyncs [i]->sent)
		1075	{
		1076	asyncs [i]->sent = 0;
		1077	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1078	}
		1079	}
		1080	#endif
708	}	1081	}
709		1082
710	/*****************************************************************************/	1083	/*****************************************************************************/
711		1084
		1085	static void
		1086	ev_sighandler (int signum)
		1087	{
		1088	#if EV_MULTIPLICITY
		1089	struct ev_loop *loop = &default_loop_struct;
		1090	#endif
		1091
		1092	#if _WIN32
		1093	signal (signum, ev_sighandler);
		1094	#endif
		1095
		1096	signals [signum - 1].gotsig = 1;
		1097	evpipe_write (EV_A_ &gotsig);
		1098	}
		1099
		1100	void noinline
		1101	ev_feed_signal_event (EV_P_ int signum)
		1102	{
		1103	WL w;
		1104
		1105	#if EV_MULTIPLICITY
		1106	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1107	#endif
		1108
		1109	--signum;
		1110
		1111	if (signum < 0 || signum >= signalmax)
		1112	return;
		1113
		1114	signals [signum].gotsig = 0;
		1115
		1116	for (w = signals [signum].head; w; w = w->next)
		1117	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1118	}
		1119
		1120	/*****************************************************************************/
		1121
712	static ev_child *childs [PID_HASHSIZE];	1122	static WL childs [EV_PID_HASHSIZE];
713		1123
714	#ifndef _WIN32	1124	#ifndef _WIN32
715		1125
716	static ev_signal childev;	1126	static ev_signal childev;
		1127
		1128	#ifndef WIFCONTINUED
		1129	# define WIFCONTINUED(status) 0
		1130	#endif
		1131
		1132	void inline_speed
		1133	child_reap (EV_P_ int chain, int pid, int status)
		1134	{
		1135	ev_child *w;
		1136	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1137
		1138	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1139	{
		1140	if ((w->pid == pid || !w->pid)
		1141	&& (!traced || (w->flags & 1)))
		1142	{
		1143	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1144	w->rpid = pid;
		1145	w->rstatus = status;
		1146	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1147	}
		1148	}
		1149	}
717		1150
718	#ifndef WCONTINUED	1151	#ifndef WCONTINUED
719	# define WCONTINUED 0	1152	# define WCONTINUED 0
720	#endif	1153	#endif
721		1154
722	void inline_speed
723	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
724	{
725	ev_child *w;
726
727	for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
728	if (w->pid == pid || !w->pid)
729	{
730	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
731	w->rpid = pid;
732	w->rstatus = status;
733	ev_feed_event (EV_A_ (W)w, EV_CHILD);
734	}
735	}
736
737	static void	1155	static void
738	childcb (EV_P_ ev_signal *sw, int revents)	1156	childcb (EV_P_ ev_signal *sw, int revents)
739	{	1157	{
740	int pid, status;	1158	int pid, status;
741		1159
		1160	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
742	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	1161	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
743	{	1162	if (!WCONTINUED
		1163	|| errno != EINVAL
		1164	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1165	return;
		1166
744	/* make sure we are called again until all childs have been reaped */	1167	/* make sure we are called again until all children have been reaped */
745	/* we need to do it this way so that the callback gets called before we continue */	1168	/* we need to do it this way so that the callback gets called before we continue */
746	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1169	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
747		1170
748	child_reap (EV_A_ sw, pid, pid, status);	1171	child_reap (EV_A_ pid, pid, status);
		1172	if (EV_PID_HASHSIZE > 1)
749	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */	1173	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
750	}
751	}	1174	}
752		1175
753	#endif	1176	#endif
754		1177
755	/*****************************************************************************/	1178	/*****************************************************************************/
…		…
827	}	1250	}
828		1251
829	unsigned int	1252	unsigned int
830	ev_embeddable_backends (void)	1253	ev_embeddable_backends (void)
831	{	1254	{
832	return EVBACKEND_EPOLL	1255	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
833	| EVBACKEND_KQUEUE	1256
834	| EVBACKEND_PORT;	1257	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1258	/* please fix it and tell me how to detect the fix */
		1259	flags &= ~EVBACKEND_EPOLL;
		1260
		1261	return flags;
835	}	1262	}
836		1263
837	unsigned int	1264	unsigned int
838	ev_backend (EV_P)	1265	ev_backend (EV_P)
839	{	1266	{
840	return backend;	1267	return backend;
841	}	1268	}
842		1269
843	static void	1270	unsigned int
		1271	ev_loop_count (EV_P)
		1272	{
		1273	return loop_count;
		1274	}
		1275
		1276	void
		1277	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1278	{
		1279	io_blocktime = interval;
		1280	}
		1281
		1282	void
		1283	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1284	{
		1285	timeout_blocktime = interval;
		1286	}
		1287
		1288	static void noinline
844	loop_init (EV_P_ unsigned int flags)	1289	loop_init (EV_P_ unsigned int flags)
845	{	1290	{
846	if (!backend)	1291	if (!backend)
847	{	1292	{
848	#if EV_USE_MONOTONIC	1293	#if EV_USE_MONOTONIC
…		…
851	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1296	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
852	have_monotonic = 1;	1297	have_monotonic = 1;
853	}	1298	}
854	#endif	1299	#endif
855		1300
856	ev_rt_now = ev_time ();	1301	ev_rt_now = ev_time ();
857	mn_now = get_clock ();	1302	mn_now = get_clock ();
858	now_floor = mn_now;	1303	now_floor = mn_now;
859	rtmn_diff = ev_rt_now - mn_now;	1304	rtmn_diff = ev_rt_now - mn_now;
		1305
		1306	io_blocktime = 0.;
		1307	timeout_blocktime = 0.;
		1308	backend = 0;
		1309	backend_fd = -1;
		1310	gotasync = 0;
		1311	#if EV_USE_INOTIFY
		1312	fs_fd = -2;
		1313	#endif
		1314
		1315	/* pid check not overridable via env */
		1316	#ifndef _WIN32
		1317	if (flags & EVFLAG_FORKCHECK)
		1318	curpid = getpid ();
		1319	#endif
860		1320
861	if (!(flags & EVFLAG_NOENV)	1321	if (!(flags & EVFLAG_NOENV)
862	&& !enable_secure ()	1322	&& !enable_secure ()
863	&& getenv ("LIBEV_FLAGS"))	1323	&& getenv ("LIBEV_FLAGS"))
864	flags = atoi (getenv ("LIBEV_FLAGS"));	1324	flags = atoi (getenv ("LIBEV_FLAGS"));
865		1325
866	if (!(flags & 0x0000ffffUL))	1326	if (!(flags & 0x0000ffffU))
867	flags |= ev_recommended_backends ();	1327	flags |= ev_recommended_backends ();
868		1328
869	backend = 0;
870	#if EV_USE_PORT	1329	#if EV_USE_PORT
871	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1330	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
872	#endif	1331	#endif
873	#if EV_USE_KQUEUE	1332	#if EV_USE_KQUEUE
874	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);	1333	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
…		…
881	#endif	1340	#endif
882	#if EV_USE_SELECT	1341	#if EV_USE_SELECT
883	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1342	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
884	#endif	1343	#endif
885		1344
886	ev_init (&sigev, sigcb);	1345	ev_init (&pipeev, pipecb);
887	ev_set_priority (&sigev, EV_MAXPRI);	1346	ev_set_priority (&pipeev, EV_MAXPRI);
888	}	1347	}
889	}	1348	}
890		1349
891	static void	1350	static void noinline
892	loop_destroy (EV_P)	1351	loop_destroy (EV_P)
893	{	1352	{
894	int i;	1353	int i;
		1354
		1355	if (ev_is_active (&pipeev))
		1356	{
		1357	ev_ref (EV_A); /* signal watcher */
		1358	ev_io_stop (EV_A_ &pipeev);
		1359
		1360	#if EV_USE_EVENTFD
		1361	if (evfd >= 0)
		1362	close (evfd);
		1363	#endif
		1364
		1365	if (evpipe [0] >= 0)
		1366	{
		1367	close (evpipe [0]);
		1368	close (evpipe [1]);
		1369	}
		1370	}
		1371
		1372	#if EV_USE_INOTIFY
		1373	if (fs_fd >= 0)
		1374	close (fs_fd);
		1375	#endif
		1376
		1377	if (backend_fd >= 0)
		1378	close (backend_fd);
895		1379
896	#if EV_USE_PORT	1380	#if EV_USE_PORT
897	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);	1381	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
898	#endif	1382	#endif
899	#if EV_USE_KQUEUE	1383	#if EV_USE_KQUEUE
…		…
908	#if EV_USE_SELECT	1392	#if EV_USE_SELECT
909	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);	1393	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
910	#endif	1394	#endif
911		1395
912	for (i = NUMPRI; i--; )	1396	for (i = NUMPRI; i--; )
		1397	{
913	array_free (pending, [i]);	1398	array_free (pending, [i]);
		1399	#if EV_IDLE_ENABLE
		1400	array_free (idle, [i]);
		1401	#endif
		1402	}
		1403
		1404	ev_free (anfds); anfdmax = 0;
914		1405
915	/* have to use the microsoft-never-gets-it-right macro */	1406	/* have to use the microsoft-never-gets-it-right macro */
916	array_free (fdchange, EMPTY0);	1407	array_free (fdchange, EMPTY);
917	array_free (timer, EMPTY0);	1408	array_free (timer, EMPTY);
918	#if EV_PERIODIC_ENABLE	1409	#if EV_PERIODIC_ENABLE
919	array_free (periodic, EMPTY0);	1410	array_free (periodic, EMPTY);
920	#endif	1411	#endif
		1412	#if EV_FORK_ENABLE
921	array_free (idle, EMPTY0);	1413	array_free (fork, EMPTY);
		1414	#endif
922	array_free (prepare, EMPTY0);	1415	array_free (prepare, EMPTY);
923	array_free (check, EMPTY0);	1416	array_free (check, EMPTY);
		1417	#if EV_ASYNC_ENABLE
		1418	array_free (async, EMPTY);
		1419	#endif
924		1420
925	backend = 0;	1421	backend = 0;
926	}	1422	}
927		1423
928	static void	1424	#if EV_USE_INOTIFY
		1425	void inline_size infy_fork (EV_P);
		1426	#endif
		1427
		1428	void inline_size
929	loop_fork (EV_P)	1429	loop_fork (EV_P)
930	{	1430	{
931	#if EV_USE_PORT	1431	#if EV_USE_PORT
932	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1432	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
933	#endif	1433	#endif
…		…
935	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);	1435	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
936	#endif	1436	#endif
937	#if EV_USE_EPOLL	1437	#if EV_USE_EPOLL
938	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);	1438	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
939	#endif	1439	#endif
		1440	#if EV_USE_INOTIFY
		1441	infy_fork (EV_A);
		1442	#endif
940		1443
941	if (ev_is_active (&sigev))	1444	if (ev_is_active (&pipeev))
942	{	1445	{
943	/* default loop */	1446	/* this "locks" the handlers against writing to the pipe */
		1447	/* while we modify the fd vars */
		1448	gotsig = 1;
		1449	#if EV_ASYNC_ENABLE
		1450	gotasync = 1;
		1451	#endif
944		1452
945	ev_ref (EV_A);	1453	ev_ref (EV_A);
946	ev_io_stop (EV_A_ &sigev);	1454	ev_io_stop (EV_A_ &pipeev);
		1455
		1456	#if EV_USE_EVENTFD
		1457	if (evfd >= 0)
		1458	close (evfd);
		1459	#endif
		1460
		1461	if (evpipe [0] >= 0)
		1462	{
947	close (sigpipe [0]);	1463	close (evpipe [0]);
948	close (sigpipe [1]);	1464	close (evpipe [1]);
		1465	}
949		1466
950	while (pipe (sigpipe))
951	syserr ("(libev) error creating pipe");
952
953	siginit (EV_A);	1467	evpipe_init (EV_A);
		1468	/* now iterate over everything, in case we missed something */
		1469	pipecb (EV_A_ &pipeev, EV_READ);
954	}	1470	}
955		1471
956	postfork = 0;	1472	postfork = 0;
957	}	1473	}
958		1474
959	#if EV_MULTIPLICITY	1475	#if EV_MULTIPLICITY
		1476
960	struct ev_loop *	1477	struct ev_loop *
961	ev_loop_new (unsigned int flags)	1478	ev_loop_new (unsigned int flags)
962	{	1479	{
963	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	1480	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
964		1481
…		…
980	}	1497	}
981		1498
982	void	1499	void
983	ev_loop_fork (EV_P)	1500	ev_loop_fork (EV_P)
984	{	1501	{
985	postfork = 1;	1502	postfork = 1; /* must be in line with ev_default_fork */
986	}	1503	}
987		1504
		1505	#if EV_VERIFY
		1506	static void noinline
		1507	verify_watcher (EV_P_ W w)
		1508	{
		1509	assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
		1510
		1511	if (w->pending)
		1512	assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
		1513	}
		1514
		1515	static void noinline
		1516	verify_heap (EV_P_ ANHE *heap, int N)
		1517	{
		1518	int i;
		1519
		1520	for (i = HEAP0; i < N + HEAP0; ++i)
		1521	{
		1522	assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
		1523	assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
		1524	assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
		1525
		1526	verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
		1527	}
		1528	}
		1529
		1530	static void noinline
		1531	array_verify (EV_P_ W *ws, int cnt)
		1532	{
		1533	while (cnt--)
		1534	{
		1535	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
		1536	verify_watcher (EV_A_ ws [cnt]);
		1537	}
		1538	}
		1539	#endif
		1540
		1541	void
		1542	ev_loop_verify (EV_P)
		1543	{
		1544	#if EV_VERIFY
		1545	int i;
		1546	WL w;
		1547
		1548	assert (activecnt >= -1);
		1549
		1550	assert (fdchangemax >= fdchangecnt);
		1551	for (i = 0; i < fdchangecnt; ++i)
		1552	assert (("negative fd in fdchanges", fdchanges [i] >= 0));
		1553
		1554	assert (anfdmax >= 0);
		1555	for (i = 0; i < anfdmax; ++i)
		1556	for (w = anfds [i].head; w; w = w->next)
		1557	{
		1558	verify_watcher (EV_A_ (W)w);
		1559	assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
		1560	assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
		1561	}
		1562
		1563	assert (timermax >= timercnt);
		1564	verify_heap (EV_A_ timers, timercnt);
		1565
		1566	#if EV_PERIODIC_ENABLE
		1567	assert (periodicmax >= periodiccnt);
		1568	verify_heap (EV_A_ periodics, periodiccnt);
		1569	#endif
		1570
		1571	for (i = NUMPRI; i--; )
		1572	{
		1573	assert (pendingmax [i] >= pendingcnt [i]);
		1574	#if EV_IDLE_ENABLE
		1575	assert (idleall >= 0);
		1576	assert (idlemax [i] >= idlecnt [i]);
		1577	array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
		1578	#endif
		1579	}
		1580
		1581	#if EV_FORK_ENABLE
		1582	assert (forkmax >= forkcnt);
		1583	array_verify (EV_A_ (W *)forks, forkcnt);
		1584	#endif
		1585
		1586	#if EV_ASYNC_ENABLE
		1587	assert (asyncmax >= asynccnt);
		1588	array_verify (EV_A_ (W *)asyncs, asynccnt);
		1589	#endif
		1590
		1591	assert (preparemax >= preparecnt);
		1592	array_verify (EV_A_ (W *)prepares, preparecnt);
		1593
		1594	assert (checkmax >= checkcnt);
		1595	array_verify (EV_A_ (W *)checks, checkcnt);
		1596
		1597	# if 0
		1598	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1599	for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
988	#endif	1600	# endif
		1601	#endif
		1602	}
		1603
		1604	#endif /* multiplicity */
989		1605
990	#if EV_MULTIPLICITY	1606	#if EV_MULTIPLICITY
991	struct ev_loop *	1607	struct ev_loop *
992	ev_default_loop_init (unsigned int flags)	1608	ev_default_loop_init (unsigned int flags)
993	#else	1609	#else
994	int	1610	int
995	ev_default_loop (unsigned int flags)	1611	ev_default_loop (unsigned int flags)
996	#endif	1612	#endif
997	{	1613	{
998	if (sigpipe [0] == sigpipe [1])
999	if (pipe (sigpipe))
1000	return 0;
1001
1002	if (!ev_default_loop_ptr)	1614	if (!ev_default_loop_ptr)
1003	{	1615	{
1004	#if EV_MULTIPLICITY	1616	#if EV_MULTIPLICITY
1005	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1617	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1006	#else	1618	#else
…		…
1009		1621
1010	loop_init (EV_A_ flags);	1622	loop_init (EV_A_ flags);
1011		1623
1012	if (ev_backend (EV_A))	1624	if (ev_backend (EV_A))
1013	{	1625	{
1014	siginit (EV_A);
1015
1016	#ifndef _WIN32	1626	#ifndef _WIN32
1017	ev_signal_init (&childev, childcb, SIGCHLD);	1627	ev_signal_init (&childev, childcb, SIGCHLD);
1018	ev_set_priority (&childev, EV_MAXPRI);	1628	ev_set_priority (&childev, EV_MAXPRI);
1019	ev_signal_start (EV_A_ &childev);	1629	ev_signal_start (EV_A_ &childev);
1020	ev_unref (EV_A); /* child watcher should not keep loop alive */	1630	ev_unref (EV_A); /* child watcher should not keep loop alive */
…		…
1032	{	1642	{
1033	#if EV_MULTIPLICITY	1643	#if EV_MULTIPLICITY
1034	struct ev_loop *loop = ev_default_loop_ptr;	1644	struct ev_loop *loop = ev_default_loop_ptr;
1035	#endif	1645	#endif
1036		1646
		1647	ev_default_loop_ptr = 0;
		1648
1037	#ifndef _WIN32	1649	#ifndef _WIN32
1038	ev_ref (EV_A); /* child watcher */	1650	ev_ref (EV_A); /* child watcher */
1039	ev_signal_stop (EV_A_ &childev);	1651	ev_signal_stop (EV_A_ &childev);
1040	#endif	1652	#endif
1041		1653
1042	ev_ref (EV_A); /* signal watcher */
1043	ev_io_stop (EV_A_ &sigev);
1044
1045	close (sigpipe [0]); sigpipe [0] = 0;
1046	close (sigpipe [1]); sigpipe [1] = 0;
1047
1048	loop_destroy (EV_A);	1654	loop_destroy (EV_A);
1049	}	1655	}
1050		1656
1051	void	1657	void
1052	ev_default_fork (void)	1658	ev_default_fork (void)
1053	{	1659	{
1054	#if EV_MULTIPLICITY	1660	#if EV_MULTIPLICITY
1055	struct ev_loop *loop = ev_default_loop_ptr;	1661	struct ev_loop *loop = ev_default_loop_ptr;
1056	#endif	1662	#endif
1057		1663
1058	if (backend)	1664	postfork = 1; /* must be in line with ev_loop_fork */
1059	postfork = 1;
1060	}	1665	}
1061		1666
1062	/*****************************************************************************/	1667	/*****************************************************************************/
1063		1668
1064	int inline_size	1669	void
1065	any_pending (EV_P)	1670	ev_invoke (EV_P_ void *w, int revents)
1066	{	1671	{
1067	int pri;	1672	EV_CB_INVOKE ((W)w, revents);
1068
1069	for (pri = NUMPRI; pri--; )
1070	if (pendingcnt [pri])
1071	return 1;
1072
1073	return 0;
1074	}	1673	}
1075		1674
1076	void inline_speed	1675	void inline_speed
1077	call_pending (EV_P)	1676	call_pending (EV_P)
1078	{	1677	{
…		…
1083	{	1682	{
1084	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1683	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1085		1684
1086	if (expect_true (p->w))	1685	if (expect_true (p->w))
1087	{	1686	{
1088	assert (("non-pending watcher on pending list", p->w->pending));	1687	/*assert (("non-pending watcher on pending list", p->w->pending));*/
1089		1688
1090	p->w->pending = 0;	1689	p->w->pending = 0;
1091	EV_CB_INVOKE (p->w, p->events);	1690	EV_CB_INVOKE (p->w, p->events);
		1691	EV_FREQUENT_CHECK;
1092	}	1692	}
1093	}	1693	}
1094	}	1694	}
1095		1695
		1696	#if EV_IDLE_ENABLE
		1697	void inline_size
		1698	idle_reify (EV_P)
		1699	{
		1700	if (expect_false (idleall))
		1701	{
		1702	int pri;
		1703
		1704	for (pri = NUMPRI; pri--; )
		1705	{
		1706	if (pendingcnt [pri])
		1707	break;
		1708
		1709	if (idlecnt [pri])
		1710	{
		1711	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1712	break;
		1713	}
		1714	}
		1715	}
		1716	}
		1717	#endif
		1718
1096	void inline_size	1719	void inline_size
1097	timers_reify (EV_P)	1720	timers_reify (EV_P)
1098	{	1721	{
		1722	EV_FREQUENT_CHECK;
		1723
1099	while (timercnt && ((WT)timers [0])->at <= mn_now)	1724	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1100	{	1725	{
1101	ev_timer *w = timers [0];	1726	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1102		1727
1103	assert (("inactive timer on timer heap detected", ev_is_active (w)));	1728	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1104		1729
1105	/* first reschedule or stop timer */	1730	/* first reschedule or stop timer */
1106	if (w->repeat)	1731	if (w->repeat)
1107	{	1732	{
		1733	ev_at (w) += w->repeat;
		1734	if (ev_at (w) < mn_now)
		1735	ev_at (w) = mn_now;
		1736
1108	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1737	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1109		1738
1110	((WT)w)->at += w->repeat;	1739	ANHE_at_cache (timers [HEAP0]);
1111	if (((WT)w)->at < mn_now)
1112	((WT)w)->at = mn_now;
1113
1114	downheap ((WT *)timers, timercnt, 0);	1740	downheap (timers, timercnt, HEAP0);
1115	}	1741	}
1116	else	1742	else
1117	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1743	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1118		1744
		1745	EV_FREQUENT_CHECK;
1119	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1746	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1120	}	1747	}
1121	}	1748	}
1122		1749
1123	#if EV_PERIODIC_ENABLE	1750	#if EV_PERIODIC_ENABLE
1124	void inline_size	1751	void inline_size
1125	periodics_reify (EV_P)	1752	periodics_reify (EV_P)
1126	{	1753	{
		1754	EV_FREQUENT_CHECK;
		1755
1127	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)	1756	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1128	{	1757	{
1129	ev_periodic *w = periodics [0];	1758	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1130		1759
1131	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	1760	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1132		1761
1133	/* first reschedule or stop timer */	1762	/* first reschedule or stop timer */
1134	if (w->reschedule_cb)	1763	if (w->reschedule_cb)
1135	{	1764	{
1136	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);	1765	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1766
1137	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));	1767	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		1768
		1769	ANHE_at_cache (periodics [HEAP0]);
1138	downheap ((WT *)periodics, periodiccnt, 0);	1770	downheap (periodics, periodiccnt, HEAP0);
1139	}	1771	}
1140	else if (w->interval)	1772	else if (w->interval)
1141	{	1773	{
1142	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;	1774	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1143	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));	1775	/* if next trigger time is not sufficiently in the future, put it there */
		1776	/* this might happen because of floating point inexactness */
		1777	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1778	{
		1779	ev_at (w) += w->interval;
		1780
		1781	/* if interval is unreasonably low we might still have a time in the past */
		1782	/* so correct this. this will make the periodic very inexact, but the user */
		1783	/* has effectively asked to get triggered more often than possible */
		1784	if (ev_at (w) < ev_rt_now)
		1785	ev_at (w) = ev_rt_now;
		1786	}
		1787
		1788	ANHE_at_cache (periodics [HEAP0]);
1144	downheap ((WT *)periodics, periodiccnt, 0);	1789	downheap (periodics, periodiccnt, HEAP0);
1145	}	1790	}
1146	else	1791	else
1147	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1792	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1148		1793
		1794	EV_FREQUENT_CHECK;
1149	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1795	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1150	}	1796	}
1151	}	1797	}
1152		1798
1153	static void noinline	1799	static void noinline
1154	periodics_reschedule (EV_P)	1800	periodics_reschedule (EV_P)
1155	{	1801	{
1156	int i;	1802	int i;
1157		1803
1158	/* adjust periodics after time jump */	1804	/* adjust periodics after time jump */
1159	for (i = 0; i < periodiccnt; ++i)	1805	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1160	{	1806	{
1161	ev_periodic *w = periodics [i];	1807	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1162		1808
1163	if (w->reschedule_cb)	1809	if (w->reschedule_cb)
1164	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	1810	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1165	else if (w->interval)	1811	else if (w->interval)
1166	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	1812	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1813
		1814	ANHE_at_cache (periodics [i]);
		1815	}
		1816
		1817	reheap (periodics, periodiccnt);
		1818	}
		1819	#endif
		1820
		1821	void inline_speed
		1822	time_update (EV_P_ ev_tstamp max_block)
		1823	{
		1824	int i;
		1825
		1826	#if EV_USE_MONOTONIC
		1827	if (expect_true (have_monotonic))
1167	}	1828	{
		1829	ev_tstamp odiff = rtmn_diff;
1168		1830
1169	/* now rebuild the heap */
1170	for (i = periodiccnt >> 1; i--; )
1171	downheap ((WT *)periodics, periodiccnt, i);
1172	}
1173	#endif
1174
1175	int inline_size
1176	time_update_monotonic (EV_P)
1177	{
1178	mn_now = get_clock ();	1831	mn_now = get_clock ();
1179		1832
		1833	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1834	/* interpolate in the meantime */
1180	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1835	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1181	{	1836	{
1182	ev_rt_now = rtmn_diff + mn_now;	1837	ev_rt_now = rtmn_diff + mn_now;
1183	return 0;	1838	return;
1184	}	1839	}
1185	else	1840
1186	{
1187	now_floor = mn_now;	1841	now_floor = mn_now;
1188	ev_rt_now = ev_time ();	1842	ev_rt_now = ev_time ();
1189	return 1;
1190	}
1191	}
1192		1843
1193	void inline_size	1844	/* loop a few times, before making important decisions.
1194	time_update (EV_P)	1845	* on the choice of "4": one iteration isn't enough,
1195	{	1846	* in case we get preempted during the calls to
1196	int i;	1847	* ev_time and get_clock. a second call is almost guaranteed
1197		1848	* to succeed in that case, though. and looping a few more times
1198	#if EV_USE_MONOTONIC	1849	* doesn't hurt either as we only do this on time-jumps or
1199	if (expect_true (have_monotonic))	1850	* in the unlikely event of having been preempted here.
1200	{	1851	*/
1201	if (time_update_monotonic (EV_A))	1852	for (i = 4; --i; )
1202	{	1853	{
1203	ev_tstamp odiff = rtmn_diff;
1204
1205	/* loop a few times, before making important decisions.
1206	* on the choice of "4": one iteration isn't enough,
1207	* in case we get preempted during the calls to
1208	* ev_time and get_clock. a second call is almost guarenteed
1209	* to succeed in that case, though. and looping a few more times
1210	* doesn't hurt either as we only do this on time-jumps or
1211	* in the unlikely event of getting preempted here.
1212	*/
1213	for (i = 4; --i; )
1214	{
1215	rtmn_diff = ev_rt_now - mn_now;	1854	rtmn_diff = ev_rt_now - mn_now;
1216		1855
1217	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1856	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1218	return; /* all is well */	1857	return; /* all is well */
1219		1858
1220	ev_rt_now = ev_time ();	1859	ev_rt_now = ev_time ();
1221	mn_now = get_clock ();	1860	mn_now = get_clock ();
1222	now_floor = mn_now;	1861	now_floor = mn_now;
1223	}	1862	}
1224		1863
1225	# if EV_PERIODIC_ENABLE	1864	# if EV_PERIODIC_ENABLE
1226	periodics_reschedule (EV_A);	1865	periodics_reschedule (EV_A);
1227	# endif	1866	# endif
1228	/* no timer adjustment, as the monotonic clock doesn't jump */	1867	/* no timer adjustment, as the monotonic clock doesn't jump */
1229	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */	1868	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1230	}
1231	}	1869	}
1232	else	1870	else
1233	#endif	1871	#endif
1234	{	1872	{
1235	ev_rt_now = ev_time ();	1873	ev_rt_now = ev_time ();
1236		1874
1237	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1875	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1238	{	1876	{
1239	#if EV_PERIODIC_ENABLE	1877	#if EV_PERIODIC_ENABLE
1240	periodics_reschedule (EV_A);	1878	periodics_reschedule (EV_A);
1241	#endif	1879	#endif
1242
1243	/* adjust timers. this is easy, as the offset is the same for all */	1880	/* adjust timers. this is easy, as the offset is the same for all of them */
1244	for (i = 0; i < timercnt; ++i)	1881	for (i = 0; i < timercnt; ++i)
		1882	{
		1883	ANHE *he = timers + i + HEAP0;
1245	((WT)timers [i])->at += ev_rt_now - mn_now;	1884	ANHE_w (*he)->at += ev_rt_now - mn_now;
		1885	ANHE_at_cache (*he);
		1886	}
1246	}	1887	}
1247		1888
1248	mn_now = ev_rt_now;	1889	mn_now = ev_rt_now;
1249	}	1890	}
1250	}	1891	}
…		…
1259	ev_unref (EV_P)	1900	ev_unref (EV_P)
1260	{	1901	{
1261	--activecnt;	1902	--activecnt;
1262	}	1903	}
1263		1904
		1905	void
		1906	ev_now_update (EV_P)
		1907	{
		1908	time_update (EV_A_ 1e100);
		1909	}
		1910
1264	static int loop_done;	1911	static int loop_done;
1265		1912
1266	void	1913	void
1267	ev_loop (EV_P_ int flags)	1914	ev_loop (EV_P_ int flags)
1268	{	1915	{
1269	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)	1916	loop_done = EVUNLOOP_CANCEL;
1270	? EVUNLOOP_ONE
1271	: EVUNLOOP_CANCEL;
1272		1917
1273	while (activecnt)	1918	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
		1919
		1920	do
1274	{	1921	{
		1922	#if EV_VERIFY >= 2
		1923	ev_loop_verify (EV_A);
		1924	#endif
		1925
		1926	#ifndef _WIN32
		1927	if (expect_false (curpid)) /* penalise the forking check even more */
		1928	if (expect_false (getpid () != curpid))
		1929	{
		1930	curpid = getpid ();
		1931	postfork = 1;
		1932	}
		1933	#endif
		1934
		1935	#if EV_FORK_ENABLE
		1936	/* we might have forked, so queue fork handlers */
		1937	if (expect_false (postfork))
		1938	if (forkcnt)
		1939	{
		1940	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1941	call_pending (EV_A);
		1942	}
		1943	#endif
		1944
1275	/* queue check watchers (and execute them) */	1945	/* queue prepare watchers (and execute them) */
1276	if (expect_false (preparecnt))	1946	if (expect_false (preparecnt))
1277	{	1947	{
1278	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1948	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1279	call_pending (EV_A);	1949	call_pending (EV_A);
1280	}	1950	}
1281		1951
		1952	if (expect_false (!activecnt))
		1953	break;
		1954
1282	/* we might have forked, so reify kernel state if necessary */	1955	/* we might have forked, so reify kernel state if necessary */
1283	if (expect_false (postfork))	1956	if (expect_false (postfork))
1284	loop_fork (EV_A);	1957	loop_fork (EV_A);
1285		1958
1286	/* update fd-related kernel structures */	1959	/* update fd-related kernel structures */
1287	fd_reify (EV_A);	1960	fd_reify (EV_A);
1288		1961
1289	/* calculate blocking time */	1962	/* calculate blocking time */
1290	{	1963	{
1291	double block;	1964	ev_tstamp waittime = 0.;
		1965	ev_tstamp sleeptime = 0.;
1292		1966
1293	if (flags & EVLOOP_NONBLOCK || idlecnt)	1967	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1294	block = 0.; /* do not block at all */
1295	else
1296	{	1968	{
1297	/* update time to cancel out callback processing overhead */	1969	/* update time to cancel out callback processing overhead */
1298	#if EV_USE_MONOTONIC
1299	if (expect_true (have_monotonic))
1300	time_update_monotonic (EV_A);	1970	time_update (EV_A_ 1e100);
1301	else
1302	#endif
1303	{
1304	ev_rt_now = ev_time ();
1305	mn_now = ev_rt_now;
1306	}
1307		1971
1308	block = MAX_BLOCKTIME;	1972	waittime = MAX_BLOCKTIME;
1309		1973
1310	if (timercnt)	1974	if (timercnt)
1311	{	1975	{
1312	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;	1976	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1313	if (block > to) block = to;	1977	if (waittime > to) waittime = to;
1314	}	1978	}
1315		1979
1316	#if EV_PERIODIC_ENABLE	1980	#if EV_PERIODIC_ENABLE
1317	if (periodiccnt)	1981	if (periodiccnt)
1318	{	1982	{
1319	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;	1983	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1320	if (block > to) block = to;	1984	if (waittime > to) waittime = to;
1321	}	1985	}
1322	#endif	1986	#endif
1323		1987
1324	if (expect_false (block < 0.)) block = 0.;	1988	if (expect_false (waittime < timeout_blocktime))
		1989	waittime = timeout_blocktime;
		1990
		1991	sleeptime = waittime - backend_fudge;
		1992
		1993	if (expect_true (sleeptime > io_blocktime))
		1994	sleeptime = io_blocktime;
		1995
		1996	if (sleeptime)
		1997	{
		1998	ev_sleep (sleeptime);
		1999	waittime -= sleeptime;
		2000	}
1325	}	2001	}
1326		2002
		2003	++loop_count;
1327	backend_poll (EV_A_ block);	2004	backend_poll (EV_A_ waittime);
		2005
		2006	/* update ev_rt_now, do magic */
		2007	time_update (EV_A_ waittime + sleeptime);
1328	}	2008	}
1329
1330	/* update ev_rt_now, do magic */
1331	time_update (EV_A);
1332		2009
1333	/* queue pending timers and reschedule them */	2010	/* queue pending timers and reschedule them */
1334	timers_reify (EV_A); /* relative timers called last */	2011	timers_reify (EV_A); /* relative timers called last */
1335	#if EV_PERIODIC_ENABLE	2012	#if EV_PERIODIC_ENABLE
1336	periodics_reify (EV_A); /* absolute timers called first */	2013	periodics_reify (EV_A); /* absolute timers called first */
1337	#endif	2014	#endif
1338		2015
		2016	#if EV_IDLE_ENABLE
1339	/* queue idle watchers unless other events are pending */	2017	/* queue idle watchers unless other events are pending */
1340	if (idlecnt && !any_pending (EV_A))	2018	idle_reify (EV_A);
1341	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	2019	#endif
1342		2020
1343	/* queue check watchers, to be executed first */	2021	/* queue check watchers, to be executed first */
1344	if (expect_false (checkcnt))	2022	if (expect_false (checkcnt))
1345	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	2023	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1346		2024
1347	call_pending (EV_A);	2025	call_pending (EV_A);
1348
1349	if (expect_false (loop_done))
1350	break;
1351	}	2026	}
		2027	while (expect_true (
		2028	activecnt
		2029	&& !loop_done
		2030	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		2031	));
1352		2032
1353	if (loop_done == EVUNLOOP_ONE)	2033	if (loop_done == EVUNLOOP_ONE)
1354	loop_done = EVUNLOOP_CANCEL;	2034	loop_done = EVUNLOOP_CANCEL;
1355	}	2035	}
1356		2036
…		…
1383	head = &(*head)->next;	2063	head = &(*head)->next;
1384	}	2064	}
1385	}	2065	}
1386		2066
1387	void inline_speed	2067	void inline_speed
1388	ev_clear_pending (EV_P_ W w)	2068	clear_pending (EV_P_ W w)
1389	{	2069	{
1390	if (w->pending)	2070	if (w->pending)
1391	{	2071	{
1392	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2072	pendings [ABSPRI (w)][w->pending - 1].w = 0;
1393	w->pending = 0;	2073	w->pending = 0;
1394	}	2074	}
1395	}	2075	}
1396		2076
		2077	int
		2078	ev_clear_pending (EV_P_ void *w)
		2079	{
		2080	W w_ = (W)w;
		2081	int pending = w_->pending;
		2082
		2083	if (expect_true (pending))
		2084	{
		2085	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2086	w_->pending = 0;
		2087	p->w = 0;
		2088	return p->events;
		2089	}
		2090	else
		2091	return 0;
		2092	}
		2093
		2094	void inline_size
		2095	pri_adjust (EV_P_ W w)
		2096	{
		2097	int pri = w->priority;
		2098	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		2099	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		2100	w->priority = pri;
		2101	}
		2102
1397	void inline_speed	2103	void inline_speed
1398	ev_start (EV_P_ W w, int active)	2104	ev_start (EV_P_ W w, int active)
1399	{	2105	{
1400	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	2106	pri_adjust (EV_A_ w);
1401	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1402
1403	w->active = active;	2107	w->active = active;
1404	ev_ref (EV_A);	2108	ev_ref (EV_A);
1405	}	2109	}
1406		2110
1407	void inline_size	2111	void inline_size
…		…
1411	w->active = 0;	2115	w->active = 0;
1412	}	2116	}
1413		2117
1414	/*****************************************************************************/	2118	/*****************************************************************************/
1415		2119
1416	void	2120	void noinline
1417	ev_io_start (EV_P_ ev_io *w)	2121	ev_io_start (EV_P_ ev_io *w)
1418	{	2122	{
1419	int fd = w->fd;	2123	int fd = w->fd;
1420		2124
1421	if (expect_false (ev_is_active (w)))	2125	if (expect_false (ev_is_active (w)))
1422	return;	2126	return;
1423		2127
1424	assert (("ev_io_start called with negative fd", fd >= 0));	2128	assert (("ev_io_start called with negative fd", fd >= 0));
		2129	assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));
		2130
		2131	EV_FREQUENT_CHECK;
1425		2132
1426	ev_start (EV_A_ (W)w, 1);	2133	ev_start (EV_A_ (W)w, 1);
1427	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	2134	array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1428	wlist_add ((WL *)&anfds[fd].head, (WL)w);	2135	wlist_add (&anfds[fd].head, (WL)w);
1429		2136
1430	fd_change (EV_A_ fd);	2137	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1431	}	2138	w->events &= ~EV_IOFDSET;
1432		2139
1433	void	2140	EV_FREQUENT_CHECK;
		2141	}
		2142
		2143	void noinline
1434	ev_io_stop (EV_P_ ev_io *w)	2144	ev_io_stop (EV_P_ ev_io *w)
1435	{	2145	{
1436	ev_clear_pending (EV_A_ (W)w);	2146	clear_pending (EV_A_ (W)w);
1437	if (expect_false (!ev_is_active (w)))	2147	if (expect_false (!ev_is_active (w)))
1438	return;	2148	return;
1439		2149
1440	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2150	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1441		2151
		2152	EV_FREQUENT_CHECK;
		2153
1442	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	2154	wlist_del (&anfds[w->fd].head, (WL)w);
1443	ev_stop (EV_A_ (W)w);	2155	ev_stop (EV_A_ (W)w);
1444		2156
1445	fd_change (EV_A_ w->fd);	2157	fd_change (EV_A_ w->fd, 1);
1446	}
1447		2158
1448	void	2159	EV_FREQUENT_CHECK;
		2160	}
		2161
		2162	void noinline
1449	ev_timer_start (EV_P_ ev_timer *w)	2163	ev_timer_start (EV_P_ ev_timer *w)
1450	{	2164	{
1451	if (expect_false (ev_is_active (w)))	2165	if (expect_false (ev_is_active (w)))
1452	return;	2166	return;
1453		2167
1454	((WT)w)->at += mn_now;	2168	ev_at (w) += mn_now;
1455		2169
1456	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2170	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1457		2171
		2172	EV_FREQUENT_CHECK;
		2173
		2174	++timercnt;
1458	ev_start (EV_A_ (W)w, ++timercnt);	2175	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1459	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);	2176	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1460	timers [timercnt - 1] = w;	2177	ANHE_w (timers [ev_active (w)]) = (WT)w;
1461	upheap ((WT *)timers, timercnt - 1);	2178	ANHE_at_cache (timers [ev_active (w)]);
		2179	upheap (timers, ev_active (w));
1462		2180
		2181	EV_FREQUENT_CHECK;
		2182
1463	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2183	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1464	}	2184	}
1465		2185
1466	void	2186	void noinline
1467	ev_timer_stop (EV_P_ ev_timer *w)	2187	ev_timer_stop (EV_P_ ev_timer *w)
1468	{	2188	{
1469	ev_clear_pending (EV_A_ (W)w);	2189	clear_pending (EV_A_ (W)w);
1470	if (expect_false (!ev_is_active (w)))	2190	if (expect_false (!ev_is_active (w)))
1471	return;	2191	return;
1472		2192
		2193	EV_FREQUENT_CHECK;
		2194
		2195	{
		2196	int active = ev_active (w);
		2197
1473	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2198	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1474		2199
		2200	--timercnt;
		2201
1475	if (expect_true (((W)w)->active < timercnt--))	2202	if (expect_true (active < timercnt + HEAP0))
1476	{	2203	{
1477	timers [((W)w)->active - 1] = timers [timercnt];	2204	timers [active] = timers [timercnt + HEAP0];
1478	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2205	adjustheap (timers, timercnt, active);
1479	}	2206	}
		2207	}
1480		2208
1481	((WT)w)->at -= mn_now;	2209	EV_FREQUENT_CHECK;
		2210
		2211	ev_at (w) -= mn_now;
1482		2212
1483	ev_stop (EV_A_ (W)w);	2213	ev_stop (EV_A_ (W)w);
1484	}	2214	}
1485		2215
1486	void	2216	void noinline
1487	ev_timer_again (EV_P_ ev_timer *w)	2217	ev_timer_again (EV_P_ ev_timer *w)
1488	{	2218	{
		2219	EV_FREQUENT_CHECK;
		2220
1489	if (ev_is_active (w))	2221	if (ev_is_active (w))
1490	{	2222	{
1491	if (w->repeat)	2223	if (w->repeat)
1492	{	2224	{
1493	((WT)w)->at = mn_now + w->repeat;	2225	ev_at (w) = mn_now + w->repeat;
		2226	ANHE_at_cache (timers [ev_active (w)]);
1494	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2227	adjustheap (timers, timercnt, ev_active (w));
1495	}	2228	}
1496	else	2229	else
1497	ev_timer_stop (EV_A_ w);	2230	ev_timer_stop (EV_A_ w);
1498	}	2231	}
1499	else if (w->repeat)	2232	else if (w->repeat)
1500	{	2233	{
1501	w->at = w->repeat;	2234	ev_at (w) = w->repeat;
1502	ev_timer_start (EV_A_ w);	2235	ev_timer_start (EV_A_ w);
1503	}	2236	}
		2237
		2238	EV_FREQUENT_CHECK;
1504	}	2239	}
1505		2240
1506	#if EV_PERIODIC_ENABLE	2241	#if EV_PERIODIC_ENABLE
1507	void	2242	void noinline
1508	ev_periodic_start (EV_P_ ev_periodic *w)	2243	ev_periodic_start (EV_P_ ev_periodic *w)
1509	{	2244	{
1510	if (expect_false (ev_is_active (w)))	2245	if (expect_false (ev_is_active (w)))
1511	return;	2246	return;
1512		2247
1513	if (w->reschedule_cb)	2248	if (w->reschedule_cb)
1514	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2249	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1515	else if (w->interval)	2250	else if (w->interval)
1516	{	2251	{
1517	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2252	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1518	/* this formula differs from the one in periodic_reify because we do not always round up */	2253	/* this formula differs from the one in periodic_reify because we do not always round up */
1519	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	2254	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1520	}	2255	}
		2256	else
		2257	ev_at (w) = w->offset;
1521		2258
		2259	EV_FREQUENT_CHECK;
		2260
		2261	++periodiccnt;
1522	ev_start (EV_A_ (W)w, ++periodiccnt);	2262	ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1523	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);	2263	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1524	periodics [periodiccnt - 1] = w;	2264	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1525	upheap ((WT *)periodics, periodiccnt - 1);	2265	ANHE_at_cache (periodics [ev_active (w)]);
		2266	upheap (periodics, ev_active (w));
1526		2267
		2268	EV_FREQUENT_CHECK;
		2269
1527	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2270	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1528	}	2271	}
1529		2272
1530	void	2273	void noinline
1531	ev_periodic_stop (EV_P_ ev_periodic *w)	2274	ev_periodic_stop (EV_P_ ev_periodic *w)
1532	{	2275	{
1533	ev_clear_pending (EV_A_ (W)w);	2276	clear_pending (EV_A_ (W)w);
1534	if (expect_false (!ev_is_active (w)))	2277	if (expect_false (!ev_is_active (w)))
1535	return;	2278	return;
1536		2279
		2280	EV_FREQUENT_CHECK;
		2281
		2282	{
		2283	int active = ev_active (w);
		2284
1537	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2285	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1538		2286
		2287	--periodiccnt;
		2288
1539	if (expect_true (((W)w)->active < periodiccnt--))	2289	if (expect_true (active < periodiccnt + HEAP0))
1540	{	2290	{
1541	periodics [((W)w)->active - 1] = periodics [periodiccnt];	2291	periodics [active] = periodics [periodiccnt + HEAP0];
1542	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	2292	adjustheap (periodics, periodiccnt, active);
1543	}	2293	}
		2294	}
		2295
		2296	EV_FREQUENT_CHECK;
1544		2297
1545	ev_stop (EV_A_ (W)w);	2298	ev_stop (EV_A_ (W)w);
1546	}	2299	}
1547		2300
1548	void	2301	void noinline
1549	ev_periodic_again (EV_P_ ev_periodic *w)	2302	ev_periodic_again (EV_P_ ev_periodic *w)
1550	{	2303	{
1551	/* TODO: use adjustheap and recalculation */	2304	/* TODO: use adjustheap and recalculation */
1552	ev_periodic_stop (EV_A_ w);	2305	ev_periodic_stop (EV_A_ w);
1553	ev_periodic_start (EV_A_ w);	2306	ev_periodic_start (EV_A_ w);
1554	}	2307	}
1555	#endif	2308	#endif
1556		2309
1557	void	2310	#ifndef SA_RESTART
		2311	# define SA_RESTART 0
		2312	#endif
		2313
		2314	void noinline
1558	ev_idle_start (EV_P_ ev_idle *w)	2315	ev_signal_start (EV_P_ ev_signal *w)
1559	{	2316	{
		2317	#if EV_MULTIPLICITY
		2318	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2319	#endif
1560	if (expect_false (ev_is_active (w)))	2320	if (expect_false (ev_is_active (w)))
1561	return;	2321	return;
1562		2322
1563	ev_start (EV_A_ (W)w, ++idlecnt);	2323	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1564	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1565	idles [idlecnt - 1] = w;
1566	}
1567		2324
1568	void	2325	evpipe_init (EV_A);
1569	ev_idle_stop (EV_P_ ev_idle *w)	2326
1570	{	2327	EV_FREQUENT_CHECK;
1571	ev_clear_pending (EV_A_ (W)w);
1572	if (expect_false (!ev_is_active (w)))
1573	return;
1574		2328
1575	{	2329	{
1576	int active = ((W)w)->active;	2330	#ifndef _WIN32
1577	idles [active - 1] = idles [--idlecnt];	2331	sigset_t full, prev;
1578	((W)idles [active - 1])->active = active;	2332	sigfillset (&full);
		2333	sigprocmask (SIG_SETMASK, &full, &prev);
		2334	#endif
		2335
		2336	array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
		2337
		2338	#ifndef _WIN32
		2339	sigprocmask (SIG_SETMASK, &prev, 0);
		2340	#endif
1579	}	2341	}
1580		2342
1581	ev_stop (EV_A_ (W)w);
1582	}
1583
1584	void
1585	ev_prepare_start (EV_P_ ev_prepare *w)
1586	{
1587	if (expect_false (ev_is_active (w)))
1588	return;
1589
1590	ev_start (EV_A_ (W)w, ++preparecnt);
1591	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1592	prepares [preparecnt - 1] = w;
1593	}
1594
1595	void
1596	ev_prepare_stop (EV_P_ ev_prepare *w)
1597	{
1598	ev_clear_pending (EV_A_ (W)w);
1599	if (expect_false (!ev_is_active (w)))
1600	return;
1601
1602	{
1603	int active = ((W)w)->active;
1604	prepares [active - 1] = prepares [--preparecnt];
1605	((W)prepares [active - 1])->active = active;
1606	}
1607
1608	ev_stop (EV_A_ (W)w);
1609	}
1610
1611	void
1612	ev_check_start (EV_P_ ev_check *w)
1613	{
1614	if (expect_false (ev_is_active (w)))
1615	return;
1616
1617	ev_start (EV_A_ (W)w, ++checkcnt);
1618	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1619	checks [checkcnt - 1] = w;
1620	}
1621
1622	void
1623	ev_check_stop (EV_P_ ev_check *w)
1624	{
1625	ev_clear_pending (EV_A_ (W)w);
1626	if (expect_false (!ev_is_active (w)))
1627	return;
1628
1629	{
1630	int active = ((W)w)->active;
1631	checks [active - 1] = checks [--checkcnt];
1632	((W)checks [active - 1])->active = active;
1633	}
1634
1635	ev_stop (EV_A_ (W)w);
1636	}
1637
1638	#ifndef SA_RESTART
1639	# define SA_RESTART 0
1640	#endif
1641
1642	void
1643	ev_signal_start (EV_P_ ev_signal *w)
1644	{
1645	#if EV_MULTIPLICITY
1646	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1647	#endif
1648	if (expect_false (ev_is_active (w)))
1649	return;
1650
1651	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1652
1653	ev_start (EV_A_ (W)w, 1);	2343	ev_start (EV_A_ (W)w, 1);
1654	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1655	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2344	wlist_add (&signals [w->signum - 1].head, (WL)w);
1656		2345
1657	if (!((WL)w)->next)	2346	if (!((WL)w)->next)
1658	{	2347	{
1659	#if _WIN32	2348	#if _WIN32
1660	signal (w->signum, sighandler);	2349	signal (w->signum, ev_sighandler);
1661	#else	2350	#else
1662	struct sigaction sa;	2351	struct sigaction sa;
1663	sa.sa_handler = sighandler;	2352	sa.sa_handler = ev_sighandler;
1664	sigfillset (&sa.sa_mask);	2353	sigfillset (&sa.sa_mask);
1665	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2354	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1666	sigaction (w->signum, &sa, 0);	2355	sigaction (w->signum, &sa, 0);
1667	#endif	2356	#endif
1668	}	2357	}
1669	}
1670		2358
1671	void	2359	EV_FREQUENT_CHECK;
		2360	}
		2361
		2362	void noinline
1672	ev_signal_stop (EV_P_ ev_signal *w)	2363	ev_signal_stop (EV_P_ ev_signal *w)
1673	{	2364	{
1674	ev_clear_pending (EV_A_ (W)w);	2365	clear_pending (EV_A_ (W)w);
1675	if (expect_false (!ev_is_active (w)))	2366	if (expect_false (!ev_is_active (w)))
1676	return;	2367	return;
1677		2368
		2369	EV_FREQUENT_CHECK;
		2370
1678	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2371	wlist_del (&signals [w->signum - 1].head, (WL)w);
1679	ev_stop (EV_A_ (W)w);	2372	ev_stop (EV_A_ (W)w);
1680		2373
1681	if (!signals [w->signum - 1].head)	2374	if (!signals [w->signum - 1].head)
1682	signal (w->signum, SIG_DFL);	2375	signal (w->signum, SIG_DFL);
		2376
		2377	EV_FREQUENT_CHECK;
1683	}	2378	}
1684		2379
1685	void	2380	void
1686	ev_child_start (EV_P_ ev_child *w)	2381	ev_child_start (EV_P_ ev_child *w)
1687	{	2382	{
…		…
1689	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));	2384	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1690	#endif	2385	#endif
1691	if (expect_false (ev_is_active (w)))	2386	if (expect_false (ev_is_active (w)))
1692	return;	2387	return;
1693		2388
		2389	EV_FREQUENT_CHECK;
		2390
1694	ev_start (EV_A_ (W)w, 1);	2391	ev_start (EV_A_ (W)w, 1);
1695	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2392	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		2393
		2394	EV_FREQUENT_CHECK;
1696	}	2395	}
1697		2396
1698	void	2397	void
1699	ev_child_stop (EV_P_ ev_child *w)	2398	ev_child_stop (EV_P_ ev_child *w)
1700	{	2399	{
1701	ev_clear_pending (EV_A_ (W)w);	2400	clear_pending (EV_A_ (W)w);
1702	if (expect_false (!ev_is_active (w)))	2401	if (expect_false (!ev_is_active (w)))
1703	return;	2402	return;
1704		2403
		2404	EV_FREQUENT_CHECK;
		2405
1705	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2406	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1706	ev_stop (EV_A_ (W)w);	2407	ev_stop (EV_A_ (W)w);
1707	}
1708		2408
		2409	EV_FREQUENT_CHECK;
		2410	}
		2411
1709	#if EV_EMBED_ENABLE	2412	#if EV_STAT_ENABLE
		2413
		2414	# ifdef _WIN32
		2415	# undef lstat
		2416	# define lstat(a,b) _stati64 (a,b)
		2417	# endif
		2418
		2419	#define DEF_STAT_INTERVAL 5.0074891
		2420	#define MIN_STAT_INTERVAL 0.1074891
		2421
		2422	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2423
		2424	#if EV_USE_INOTIFY
		2425	# define EV_INOTIFY_BUFSIZE 8192
		2426
1710	void noinline	2427	static void noinline
1711	ev_embed_sweep (EV_P_ ev_embed *w)	2428	infy_add (EV_P_ ev_stat *w)
1712	{	2429	{
1713	ev_loop (w->loop, EVLOOP_NONBLOCK);	2430	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);
		2431
		2432	if (w->wd < 0)
		2433	{
		2434	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2435
		2436	/* monitor some parent directory for speedup hints */
		2437	/* note that exceeding the hardcoded path limit is not a correctness issue, */
		2438	/* but an efficiency issue only */
		2439	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2440	{
		2441	char path [4096];
		2442	strcpy (path, w->path);
		2443
		2444	do
		2445	{
		2446	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2447	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2448
		2449	char *pend = strrchr (path, '/');
		2450
		2451	if (!pend)
		2452	break; /* whoops, no '/', complain to your admin */
		2453
		2454	*pend = 0;
		2455	w->wd = inotify_add_watch (fs_fd, path, mask);
		2456	}
		2457	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2458	}
		2459	}
		2460	else
		2461	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2462
		2463	if (w->wd >= 0)
		2464	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2465	}
		2466
		2467	static void noinline
		2468	infy_del (EV_P_ ev_stat *w)
		2469	{
		2470	int slot;
		2471	int wd = w->wd;
		2472
		2473	if (wd < 0)
		2474	return;
		2475
		2476	w->wd = -2;
		2477	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2478	wlist_del (&fs_hash [slot].head, (WL)w);
		2479
		2480	/* remove this watcher, if others are watching it, they will rearm */
		2481	inotify_rm_watch (fs_fd, wd);
		2482	}
		2483
		2484	static void noinline
		2485	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2486	{
		2487	if (slot < 0)
		2488	/* overflow, need to check for all hash slots */
		2489	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2490	infy_wd (EV_A_ slot, wd, ev);
		2491	else
		2492	{
		2493	WL w_;
		2494
		2495	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2496	{
		2497	ev_stat *w = (ev_stat *)w_;
		2498	w_ = w_->next; /* lets us remove this watcher and all before it */
		2499
		2500	if (w->wd == wd || wd == -1)
		2501	{
		2502	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2503	{
		2504	w->wd = -1;
		2505	infy_add (EV_A_ w); /* re-add, no matter what */
		2506	}
		2507
		2508	stat_timer_cb (EV_A_ &w->timer, 0);
		2509	}
		2510	}
		2511	}
1714	}	2512	}
1715		2513
1716	static void	2514	static void
1717	embed_cb (EV_P_ ev_io *io, int revents)	2515	infy_cb (EV_P_ ev_io *w, int revents)
1718	{	2516	{
1719	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));	2517	char buf [EV_INOTIFY_BUFSIZE];
		2518	struct inotify_event *ev = (struct inotify_event *)buf;
		2519	int ofs;
		2520	int len = read (fs_fd, buf, sizeof (buf));
1720		2521
1721	if (ev_cb (w))	2522	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
1722	ev_feed_event (EV_A_ (W)w, EV_EMBED);	2523	infy_wd (EV_A_ ev->wd, ev->wd, ev);
1723	else
1724	ev_embed_sweep (loop, w);
1725	}	2524	}
1726		2525
1727	void	2526	void inline_size
1728	ev_embed_start (EV_P_ ev_embed *w)	2527	infy_init (EV_P)
1729	{	2528	{
1730	if (expect_false (ev_is_active (w)))	2529	if (fs_fd != -2)
1731	return;	2530	return;
1732		2531
		2532	/* kernels < 2.6.25 are borked
		2533	* http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
		2534	*/
1733	{	2535	{
1734	struct ev_loop *loop = w->loop;	2536	struct utsname buf;
1735	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	2537	int major, minor, micro;
1736	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);	2538
		2539	fs_fd = -1;
		2540
		2541	if (uname (&buf))
		2542	return;
		2543
		2544	if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
		2545	return;
		2546
		2547	if (major < 2
		2548	|| (major == 2 && minor < 6)
		2549	|| (major == 2 && minor == 6 && micro < 25))
		2550	return;
1737	}	2551	}
1738		2552
1739	ev_set_priority (&w->io, ev_priority (w));	2553	fs_fd = inotify_init ();
		2554
		2555	if (fs_fd >= 0)
		2556	{
		2557	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2558	ev_set_priority (&fs_w, EV_MAXPRI);
1740	ev_io_start (EV_A_ &w->io);	2559	ev_io_start (EV_A_ &fs_w);
1741		2560	}
1742	ev_start (EV_A_ (W)w, 1);
1743	}	2561	}
1744		2562
1745	void	2563	void inline_size
1746	ev_embed_stop (EV_P_ ev_embed *w)	2564	infy_fork (EV_P)
1747	{	2565	{
1748	ev_clear_pending (EV_A_ (W)w);	2566	int slot;
1749	if (expect_false (!ev_is_active (w)))	2567
		2568	if (fs_fd < 0)
1750	return;	2569	return;
1751		2570
1752	ev_io_stop (EV_A_ &w->io);	2571	close (fs_fd);
		2572	fs_fd = inotify_init ();
1753		2573
1754	ev_stop (EV_A_ (W)w);	2574	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
1755	}	2575	{
1756	#endif	2576	WL w_ = fs_hash [slot].head;
		2577	fs_hash [slot].head = 0;
1757		2578
1758	#if EV_STAT_ENABLE	2579	while (w_)
		2580	{
		2581	ev_stat *w = (ev_stat *)w_;
		2582	w_ = w_->next; /* lets us add this watcher */
1759		2583
		2584	w->wd = -1;
		2585
		2586	if (fs_fd >= 0)
		2587	infy_add (EV_A_ w); /* re-add, no matter what */
		2588	else
		2589	ev_timer_start (EV_A_ &w->timer);
		2590	}
		2591	}
		2592	}
		2593
		2594	#endif
		2595
1760	# ifdef _WIN32	2596	#ifdef _WIN32
1761	# define lstat(a,b) stat(a,b)	2597	# define EV_LSTAT(p,b) _stati64 (p, b)
		2598	#else
		2599	# define EV_LSTAT(p,b) lstat (p, b)
1762	# endif	2600	#endif
1763		2601
1764	void	2602	void
1765	ev_stat_stat (EV_P_ ev_stat *w)	2603	ev_stat_stat (EV_P_ ev_stat *w)
1766	{	2604	{
1767	if (lstat (w->path, &w->attr) < 0)	2605	if (lstat (w->path, &w->attr) < 0)
1768	w->attr.st_nlink = 0;	2606	w->attr.st_nlink = 0;
1769	else if (!w->attr.st_nlink)	2607	else if (!w->attr.st_nlink)
1770	w->attr.st_nlink = 1;	2608	w->attr.st_nlink = 1;
1771	}	2609	}
1772		2610
1773	static void	2611	static void noinline
1774	stat_timer_cb (EV_P_ ev_timer *w_, int revents)	2612	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1775	{	2613	{
1776	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));	2614	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
1777		2615
1778	/* we copy this here each the time so that */	2616	/* we copy this here each the time so that */
1779	/* prev has the old value when the callback gets invoked */	2617	/* prev has the old value when the callback gets invoked */
1780	w->prev = w->attr;	2618	w->prev = w->attr;
1781	ev_stat_stat (EV_A_ w);	2619	ev_stat_stat (EV_A_ w);
1782		2620
1783	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))	2621	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2622	if (
		2623	w->prev.st_dev != w->attr.st_dev
		2624	|| w->prev.st_ino != w->attr.st_ino
		2625	|| w->prev.st_mode != w->attr.st_mode
		2626	|| w->prev.st_nlink != w->attr.st_nlink
		2627	|| w->prev.st_uid != w->attr.st_uid
		2628	|| w->prev.st_gid != w->attr.st_gid
		2629	|| w->prev.st_rdev != w->attr.st_rdev
		2630	|| w->prev.st_size != w->attr.st_size
		2631	|| w->prev.st_atime != w->attr.st_atime
		2632	|| w->prev.st_mtime != w->attr.st_mtime
		2633	|| w->prev.st_ctime != w->attr.st_ctime
		2634	) {
		2635	#if EV_USE_INOTIFY
		2636	if (fs_fd >= 0)
		2637	{
		2638	infy_del (EV_A_ w);
		2639	infy_add (EV_A_ w);
		2640	ev_stat_stat (EV_A_ w); /* avoid race... */
		2641	}
		2642	#endif
		2643
1784	ev_feed_event (EV_A_ w, EV_STAT);	2644	ev_feed_event (EV_A_ w, EV_STAT);
		2645	}
1785	}	2646	}
1786		2647
1787	void	2648	void
1788	ev_stat_start (EV_P_ ev_stat *w)	2649	ev_stat_start (EV_P_ ev_stat *w)
1789	{	2650	{
…		…
1794	memset (&w->prev, 0, sizeof (ev_statdata));	2655	memset (&w->prev, 0, sizeof (ev_statdata));
1795	memset (&w->attr, 0, sizeof (ev_statdata));	2656	memset (&w->attr, 0, sizeof (ev_statdata));
1796		2657
1797	ev_stat_stat (EV_A_ w);	2658	ev_stat_stat (EV_A_ w);
1798		2659
		2660	if (w->interval < MIN_STAT_INTERVAL)
		2661	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2662
1799	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);	2663	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
1800	ev_set_priority (&w->timer, ev_priority (w));	2664	ev_set_priority (&w->timer, ev_priority (w));
		2665
		2666	#if EV_USE_INOTIFY
		2667	infy_init (EV_A);
		2668
		2669	if (fs_fd >= 0)
		2670	infy_add (EV_A_ w);
		2671	else
		2672	#endif
1801	ev_timer_start (EV_A_ &w->timer);	2673	ev_timer_start (EV_A_ &w->timer);
1802		2674
1803	ev_start (EV_A_ (W)w, 1);	2675	ev_start (EV_A_ (W)w, 1);
		2676
		2677	EV_FREQUENT_CHECK;
1804	}	2678	}
1805		2679
1806	void	2680	void
1807	ev_stat_stop (EV_P_ ev_stat *w)	2681	ev_stat_stop (EV_P_ ev_stat *w)
1808	{	2682	{
1809	ev_clear_pending (EV_A_ (W)w);	2683	clear_pending (EV_A_ (W)w);
1810	if (expect_false (!ev_is_active (w)))	2684	if (expect_false (!ev_is_active (w)))
1811	return;	2685	return;
1812		2686
		2687	EV_FREQUENT_CHECK;
		2688
		2689	#if EV_USE_INOTIFY
		2690	infy_del (EV_A_ w);
		2691	#endif
1813	ev_timer_stop (EV_A_ &w->timer);	2692	ev_timer_stop (EV_A_ &w->timer);
1814		2693
1815	ev_stop (EV_A_ (W)w);	2694	ev_stop (EV_A_ (W)w);
		2695
		2696	EV_FREQUENT_CHECK;
		2697	}
		2698	#endif
		2699
		2700	#if EV_IDLE_ENABLE
		2701	void
		2702	ev_idle_start (EV_P_ ev_idle *w)
		2703	{
		2704	if (expect_false (ev_is_active (w)))
		2705	return;
		2706
		2707	pri_adjust (EV_A_ (W)w);
		2708
		2709	EV_FREQUENT_CHECK;
		2710
		2711	{
		2712	int active = ++idlecnt [ABSPRI (w)];
		2713
		2714	++idleall;
		2715	ev_start (EV_A_ (W)w, active);
		2716
		2717	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2718	idles [ABSPRI (w)][active - 1] = w;
		2719	}
		2720
		2721	EV_FREQUENT_CHECK;
		2722	}
		2723
		2724	void
		2725	ev_idle_stop (EV_P_ ev_idle *w)
		2726	{
		2727	clear_pending (EV_A_ (W)w);
		2728	if (expect_false (!ev_is_active (w)))
		2729	return;
		2730
		2731	EV_FREQUENT_CHECK;
		2732
		2733	{
		2734	int active = ev_active (w);
		2735
		2736	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2737	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2738
		2739	ev_stop (EV_A_ (W)w);
		2740	--idleall;
		2741	}
		2742
		2743	EV_FREQUENT_CHECK;
		2744	}
		2745	#endif
		2746
		2747	void
		2748	ev_prepare_start (EV_P_ ev_prepare *w)
		2749	{
		2750	if (expect_false (ev_is_active (w)))
		2751	return;
		2752
		2753	EV_FREQUENT_CHECK;
		2754
		2755	ev_start (EV_A_ (W)w, ++preparecnt);
		2756	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2757	prepares [preparecnt - 1] = w;
		2758
		2759	EV_FREQUENT_CHECK;
		2760	}
		2761
		2762	void
		2763	ev_prepare_stop (EV_P_ ev_prepare *w)
		2764	{
		2765	clear_pending (EV_A_ (W)w);
		2766	if (expect_false (!ev_is_active (w)))
		2767	return;
		2768
		2769	EV_FREQUENT_CHECK;
		2770
		2771	{
		2772	int active = ev_active (w);
		2773
		2774	prepares [active - 1] = prepares [--preparecnt];
		2775	ev_active (prepares [active - 1]) = active;
		2776	}
		2777
		2778	ev_stop (EV_A_ (W)w);
		2779
		2780	EV_FREQUENT_CHECK;
		2781	}
		2782
		2783	void
		2784	ev_check_start (EV_P_ ev_check *w)
		2785	{
		2786	if (expect_false (ev_is_active (w)))
		2787	return;
		2788
		2789	EV_FREQUENT_CHECK;
		2790
		2791	ev_start (EV_A_ (W)w, ++checkcnt);
		2792	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2793	checks [checkcnt - 1] = w;
		2794
		2795	EV_FREQUENT_CHECK;
		2796	}
		2797
		2798	void
		2799	ev_check_stop (EV_P_ ev_check *w)
		2800	{
		2801	clear_pending (EV_A_ (W)w);
		2802	if (expect_false (!ev_is_active (w)))
		2803	return;
		2804
		2805	EV_FREQUENT_CHECK;
		2806
		2807	{
		2808	int active = ev_active (w);
		2809
		2810	checks [active - 1] = checks [--checkcnt];
		2811	ev_active (checks [active - 1]) = active;
		2812	}
		2813
		2814	ev_stop (EV_A_ (W)w);
		2815
		2816	EV_FREQUENT_CHECK;
		2817	}
		2818
		2819	#if EV_EMBED_ENABLE
		2820	void noinline
		2821	ev_embed_sweep (EV_P_ ev_embed *w)
		2822	{
		2823	ev_loop (w->other, EVLOOP_NONBLOCK);
		2824	}
		2825
		2826	static void
		2827	embed_io_cb (EV_P_ ev_io *io, int revents)
		2828	{
		2829	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2830
		2831	if (ev_cb (w))
		2832	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2833	else
		2834	ev_loop (w->other, EVLOOP_NONBLOCK);
		2835	}
		2836
		2837	static void
		2838	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2839	{
		2840	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2841
		2842	{
		2843	struct ev_loop *loop = w->other;
		2844
		2845	while (fdchangecnt)
		2846	{
		2847	fd_reify (EV_A);
		2848	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2849	}
		2850	}
		2851	}
		2852
		2853	static void
		2854	embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
		2855	{
		2856	ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
		2857
		2858	{
		2859	struct ev_loop *loop = w->other;
		2860
		2861	ev_loop_fork (EV_A);
		2862	}
		2863	}
		2864
		2865	#if 0
		2866	static void
		2867	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2868	{
		2869	ev_idle_stop (EV_A_ idle);
		2870	}
		2871	#endif
		2872
		2873	void
		2874	ev_embed_start (EV_P_ ev_embed *w)
		2875	{
		2876	if (expect_false (ev_is_active (w)))
		2877	return;
		2878
		2879	{
		2880	struct ev_loop *loop = w->other;
		2881	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2882	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2883	}
		2884
		2885	EV_FREQUENT_CHECK;
		2886
		2887	ev_set_priority (&w->io, ev_priority (w));
		2888	ev_io_start (EV_A_ &w->io);
		2889
		2890	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2891	ev_set_priority (&w->prepare, EV_MINPRI);
		2892	ev_prepare_start (EV_A_ &w->prepare);
		2893
		2894	ev_fork_init (&w->fork, embed_fork_cb);
		2895	ev_fork_start (EV_A_ &w->fork);
		2896
		2897	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2898
		2899	ev_start (EV_A_ (W)w, 1);
		2900
		2901	EV_FREQUENT_CHECK;
		2902	}
		2903
		2904	void
		2905	ev_embed_stop (EV_P_ ev_embed *w)
		2906	{
		2907	clear_pending (EV_A_ (W)w);
		2908	if (expect_false (!ev_is_active (w)))
		2909	return;
		2910
		2911	EV_FREQUENT_CHECK;
		2912
		2913	ev_io_stop (EV_A_ &w->io);
		2914	ev_prepare_stop (EV_A_ &w->prepare);
		2915	ev_fork_stop (EV_A_ &w->fork);
		2916
		2917	EV_FREQUENT_CHECK;
		2918	}
		2919	#endif
		2920
		2921	#if EV_FORK_ENABLE
		2922	void
		2923	ev_fork_start (EV_P_ ev_fork *w)
		2924	{
		2925	if (expect_false (ev_is_active (w)))
		2926	return;
		2927
		2928	EV_FREQUENT_CHECK;
		2929
		2930	ev_start (EV_A_ (W)w, ++forkcnt);
		2931	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2932	forks [forkcnt - 1] = w;
		2933
		2934	EV_FREQUENT_CHECK;
		2935	}
		2936
		2937	void
		2938	ev_fork_stop (EV_P_ ev_fork *w)
		2939	{
		2940	clear_pending (EV_A_ (W)w);
		2941	if (expect_false (!ev_is_active (w)))
		2942	return;
		2943
		2944	EV_FREQUENT_CHECK;
		2945
		2946	{
		2947	int active = ev_active (w);
		2948
		2949	forks [active - 1] = forks [--forkcnt];
		2950	ev_active (forks [active - 1]) = active;
		2951	}
		2952
		2953	ev_stop (EV_A_ (W)w);
		2954
		2955	EV_FREQUENT_CHECK;
		2956	}
		2957	#endif
		2958
		2959	#if EV_ASYNC_ENABLE
		2960	void
		2961	ev_async_start (EV_P_ ev_async *w)
		2962	{
		2963	if (expect_false (ev_is_active (w)))
		2964	return;
		2965
		2966	evpipe_init (EV_A);
		2967
		2968	EV_FREQUENT_CHECK;
		2969
		2970	ev_start (EV_A_ (W)w, ++asynccnt);
		2971	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2972	asyncs [asynccnt - 1] = w;
		2973
		2974	EV_FREQUENT_CHECK;
		2975	}
		2976
		2977	void
		2978	ev_async_stop (EV_P_ ev_async *w)
		2979	{
		2980	clear_pending (EV_A_ (W)w);
		2981	if (expect_false (!ev_is_active (w)))
		2982	return;
		2983
		2984	EV_FREQUENT_CHECK;
		2985
		2986	{
		2987	int active = ev_active (w);
		2988
		2989	asyncs [active - 1] = asyncs [--asynccnt];
		2990	ev_active (asyncs [active - 1]) = active;
		2991	}
		2992
		2993	ev_stop (EV_A_ (W)w);
		2994
		2995	EV_FREQUENT_CHECK;
		2996	}
		2997
		2998	void
		2999	ev_async_send (EV_P_ ev_async *w)
		3000	{
		3001	w->sent = 1;
		3002	evpipe_write (EV_A_ &gotasync);
1816	}	3003	}
1817	#endif	3004	#endif
1818		3005
1819	/*****************************************************************************/	3006	/*****************************************************************************/
1820		3007
…		…
1830	once_cb (EV_P_ struct ev_once *once, int revents)	3017	once_cb (EV_P_ struct ev_once *once, int revents)
1831	{	3018	{
1832	void (*cb)(int revents, void *arg) = once->cb;	3019	void (*cb)(int revents, void *arg) = once->cb;
1833	void *arg = once->arg;	3020	void *arg = once->arg;
1834		3021
1835	ev_io_stop (EV_A_ &once->io);	3022	ev_io_stop (EV_A_ &once->io);
1836	ev_timer_stop (EV_A_ &once->to);	3023	ev_timer_stop (EV_A_ &once->to);
1837	ev_free (once);	3024	ev_free (once);
1838		3025
1839	cb (revents, arg);	3026	cb (revents, arg);
1840	}	3027	}
1841		3028
1842	static void	3029	static void
1843	once_cb_io (EV_P_ ev_io *w, int revents)	3030	once_cb_io (EV_P_ ev_io *w, int revents)
1844	{	3031	{
1845	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	3032	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
		3033
		3034	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1846	}	3035	}
1847		3036
1848	static void	3037	static void
1849	once_cb_to (EV_P_ ev_timer *w, int revents)	3038	once_cb_to (EV_P_ ev_timer *w, int revents)
1850	{	3039	{
1851	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	3040	struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
		3041
		3042	once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1852	}	3043	}
1853		3044
1854	void	3045	void
1855	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	3046	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1856	{	3047	{
…		…
1878	ev_timer_set (&once->to, timeout, 0.);	3069	ev_timer_set (&once->to, timeout, 0.);
1879	ev_timer_start (EV_A_ &once->to);	3070	ev_timer_start (EV_A_ &once->to);
1880	}	3071	}
1881	}	3072	}
1882		3073
		3074	#if EV_MULTIPLICITY
		3075	#include "ev_wrap.h"
		3076	#endif
		3077
1883	#ifdef __cplusplus	3078	#ifdef __cplusplus
1884	}	3079	}
1885	#endif	3080	#endif
1886		3081

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