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Comparing libev/ev.c (file contents):
Revision 1.48 by root, Sat Nov 3 12:19:31 2007 UTC vs.
Revision 1.212 by root, Tue Feb 19 19:01:13 2008 UTC

1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* modification, are permitted provided that the following conditions are	8	* tion, are permitted provided that the following conditions are met:
9	* met:	9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
10	*	27	*
11	* * Redistributions of source code must retain the above copyright	28	* Alternatively, the contents of this file may be used under the terms of
12	* notice, this list of conditions and the following disclaimer.	29	* the GNU General Public License ("GPL") version 2 or any later version,
13	*	30	* in which case the provisions of the GPL are applicable instead of
14	* * Redistributions in binary form must reproduce the above	31	* the above. If you wish to allow the use of your version of this file
15	* copyright notice, this list of conditions and the following	32	* only under the terms of the GPL and not to allow others to use your
16	* disclaimer in the documentation and/or other materials provided	33	* version of this file under the BSD license, indicate your decision
17	* with the distribution.	34	* by deleting the provisions above and replace them with the notice
18	*	35	* and other provisions required by the GPL. If you do not delete the
19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	36	* provisions above, a recipient may use your version of this file under
20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	37	* either the BSD or the GPL.
21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30	*/	38	*/
		39
		40	#ifdef __cplusplus
		41	extern "C" {
		42	#endif
		43
		44	#ifndef EV_STANDALONE
31	#if EV_USE_CONFIG_H	45	# ifdef EV_CONFIG_H
		46	# include EV_CONFIG_H
		47	# else
32	# include "config.h"	48	# include "config.h"
		49	# endif
		50
		51	# if HAVE_CLOCK_GETTIME
		52	# ifndef EV_USE_MONOTONIC
		53	# define EV_USE_MONOTONIC 1
		54	# endif
		55	# ifndef EV_USE_REALTIME
		56	# define EV_USE_REALTIME 1
		57	# endif
		58	# else
		59	# ifndef EV_USE_MONOTONIC
		60	# define EV_USE_MONOTONIC 0
		61	# endif
		62	# ifndef EV_USE_REALTIME
		63	# define EV_USE_REALTIME 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_NANOSLEEP
		68	# if HAVE_NANOSLEEP
		69	# define EV_USE_NANOSLEEP 1
		70	# else
		71	# define EV_USE_NANOSLEEP 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_SELECT
		76	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		77	# define EV_USE_SELECT 1
		78	# else
		79	# define EV_USE_SELECT 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_POLL
		84	# if HAVE_POLL && HAVE_POLL_H
		85	# define EV_USE_POLL 1
		86	# else
		87	# define EV_USE_POLL 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_EPOLL
		92	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		93	# define EV_USE_EPOLL 1
		94	# else
		95	# define EV_USE_EPOLL 0
		96	# endif
		97	# endif
		98
		99	# ifndef EV_USE_KQUEUE
		100	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		101	# define EV_USE_KQUEUE 1
		102	# else
		103	# define EV_USE_KQUEUE 0
		104	# endif
		105	# endif
		106
		107	# ifndef EV_USE_PORT
		108	# if HAVE_PORT_H && HAVE_PORT_CREATE
		109	# define EV_USE_PORT 1
		110	# else
		111	# define EV_USE_PORT 0
		112	# endif
		113	# endif
		114
		115	# ifndef EV_USE_INOTIFY
		116	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		117	# define EV_USE_INOTIFY 1
		118	# else
		119	# define EV_USE_INOTIFY 0
		120	# endif
		121	# endif
		122
33	#endif	123	#endif
34		124
35	#include <math.h>	125	#include <math.h>
36	#include <stdlib.h>	126	#include <stdlib.h>
37	#include <unistd.h>
38	#include <fcntl.h>	127	#include <fcntl.h>
39	#include <signal.h>
40	#include <stddef.h>	128	#include <stddef.h>
41		129
42	#include <stdio.h>	130	#include <stdio.h>
43		131
44	#include <assert.h>	132	#include <assert.h>
45	#include <errno.h>	133	#include <errno.h>
46	#include <sys/types.h>	134	#include <sys/types.h>
		135	#include <time.h>
		136
		137	#include <signal.h>
		138
		139	#ifdef EV_H
		140	# include EV_H
		141	#else
		142	# include "ev.h"
		143	#endif
		144
47	#ifndef WIN32	145	#ifndef _WIN32
		146	# include <sys/time.h>
48	# include <sys/wait.h>	147	# include <sys/wait.h>
		148	# include <unistd.h>
		149	#else
		150	# define WIN32_LEAN_AND_MEAN
		151	# include <windows.h>
		152	# ifndef EV_SELECT_IS_WINSOCKET
		153	# define EV_SELECT_IS_WINSOCKET 1
49	#endif	154	# endif
50	#include <sys/time.h>	155	#endif
51	#include <time.h>
52		156
53	/**/	157	/**/
54		158
55	#ifndef EV_USE_MONOTONIC	159	#ifndef EV_USE_MONOTONIC
56	# define EV_USE_MONOTONIC 1	160	# define EV_USE_MONOTONIC 0
		161	#endif
		162
		163	#ifndef EV_USE_REALTIME
		164	# define EV_USE_REALTIME 0
		165	#endif
		166
		167	#ifndef EV_USE_NANOSLEEP
		168	# define EV_USE_NANOSLEEP 0
57	#endif	169	#endif
58		170
59	#ifndef EV_USE_SELECT	171	#ifndef EV_USE_SELECT
60	# define EV_USE_SELECT 1	172	# define EV_USE_SELECT 1
61	#endif	173	#endif
62		174
63	#ifndef EV_USE_POLL	175	#ifndef EV_USE_POLL
64	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */	176	# ifdef _WIN32
		177	# define EV_USE_POLL 0
		178	# else
		179	# define EV_USE_POLL 1
		180	# endif
65	#endif	181	#endif
66		182
67	#ifndef EV_USE_EPOLL	183	#ifndef EV_USE_EPOLL
68	# define EV_USE_EPOLL 0	184	# define EV_USE_EPOLL 0
69	#endif	185	#endif
70		186
71	#ifndef EV_USE_KQUEUE	187	#ifndef EV_USE_KQUEUE
72	# define EV_USE_KQUEUE 0	188	# define EV_USE_KQUEUE 0
73	#endif	189	#endif
74		190
75	#ifndef EV_USE_REALTIME	191	#ifndef EV_USE_PORT
76	# define EV_USE_REALTIME 1	192	# define EV_USE_PORT 0
		193	#endif
		194
		195	#ifndef EV_USE_INOTIFY
		196	# define EV_USE_INOTIFY 0
		197	#endif
		198
		199	#ifndef EV_PID_HASHSIZE
		200	# if EV_MINIMAL
		201	# define EV_PID_HASHSIZE 1
		202	# else
		203	# define EV_PID_HASHSIZE 16
		204	# endif
		205	#endif
		206
		207	#ifndef EV_INOTIFY_HASHSIZE
		208	# if EV_MINIMAL
		209	# define EV_INOTIFY_HASHSIZE 1
		210	# else
		211	# define EV_INOTIFY_HASHSIZE 16
		212	# endif
77	#endif	213	#endif
78		214
79	/**/	215	/**/
80		216
81	#ifndef CLOCK_MONOTONIC	217	#ifndef CLOCK_MONOTONIC
…		…
86	#ifndef CLOCK_REALTIME	222	#ifndef CLOCK_REALTIME
87	# undef EV_USE_REALTIME	223	# undef EV_USE_REALTIME
88	# define EV_USE_REALTIME 0	224	# define EV_USE_REALTIME 0
89	#endif	225	#endif
90		226
		227	#if !EV_STAT_ENABLE
		228	# undef EV_USE_INOTIFY
		229	# define EV_USE_INOTIFY 0
		230	#endif
		231
		232	#if !EV_USE_NANOSLEEP
		233	# ifndef _WIN32
		234	# include <sys/select.h>
		235	# endif
		236	#endif
		237
		238	#if EV_USE_INOTIFY
		239	# include <sys/inotify.h>
		240	#endif
		241
		242	#if EV_SELECT_IS_WINSOCKET
		243	# include <winsock.h>
		244	#endif
		245
91	/**/	246	/**/
92		247
		248	/*
		249	* This is used to avoid floating point rounding problems.
		250	* It is added to ev_rt_now when scheduling periodics
		251	* to ensure progress, time-wise, even when rounding
		252	* errors are against us.
		253	* This value is good at least till the year 4000.
		254	* Better solutions welcome.
		255	*/
		256	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
		257
93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	258	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */	259	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
96	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */	260	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
97		261
98	#include "ev.h"
99
100	#if __GNUC__ >= 3	262	#if __GNUC__ >= 4
101	# define expect(expr,value) __builtin_expect ((expr),(value))	263	# define expect(expr,value) __builtin_expect ((expr),(value))
102	# define inline inline	264	# define noinline __attribute__ ((noinline))
103	#else	265	#else
104	# define expect(expr,value) (expr)	266	# define expect(expr,value) (expr)
105	# define inline static	267	# define noinline
		268	# if __STDC_VERSION__ < 199901L
		269	# define inline
		270	# endif
106	#endif	271	#endif
107		272
108	#define expect_false(expr) expect ((expr) != 0, 0)	273	#define expect_false(expr) expect ((expr) != 0, 0)
109	#define expect_true(expr) expect ((expr) != 0, 1)	274	#define expect_true(expr) expect ((expr) != 0, 1)
		275	#define inline_size static inline
		276
		277	#if EV_MINIMAL
		278	# define inline_speed static noinline
		279	#else
		280	# define inline_speed static inline
		281	#endif
110		282
111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	283	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	284	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
113		285
		286	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		287	#define EMPTY2(a,b) /* used to suppress some warnings */
		288
114	typedef struct ev_watcher *W;	289	typedef ev_watcher *W;
115	typedef struct ev_watcher_list *WL;	290	typedef ev_watcher_list *WL;
116	typedef struct ev_watcher_time *WT;	291	typedef ev_watcher_time *WT;
117		292
118	static ev_tstamp now_floor, now, diff; /* monotonic clock */	293	#if EV_USE_MONOTONIC
		294	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		295	/* giving it a reasonably high chance of working on typical architetcures */
		296	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		297	#endif
		298
		299	#ifdef _WIN32
		300	# include "ev_win32.c"
		301	#endif
		302
		303	/*****************************************************************************/
		304
		305	static void (*syserr_cb)(const char *msg);
		306
		307	void
		308	ev_set_syserr_cb (void (*cb)(const char *msg))
		309	{
		310	syserr_cb = cb;
		311	}
		312
		313	static void noinline
		314	syserr (const char *msg)
		315	{
		316	if (!msg)
		317	msg = "(libev) system error";
		318
		319	if (syserr_cb)
		320	syserr_cb (msg);
		321	else
		322	{
		323	perror (msg);
		324	abort ();
		325	}
		326	}
		327
		328	static void *(*alloc)(void *ptr, long size);
		329
		330	void
		331	ev_set_allocator (void *(*cb)(void *ptr, long size))
		332	{
		333	alloc = cb;
		334	}
		335
		336	inline_speed void *
		337	ev_realloc (void *ptr, long size)
		338	{
		339	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		340
		341	if (!ptr && size)
		342	{
		343	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		344	abort ();
		345	}
		346
		347	return ptr;
		348	}
		349
		350	#define ev_malloc(size) ev_realloc (0, (size))
		351	#define ev_free(ptr) ev_realloc ((ptr), 0)
		352
		353	/*****************************************************************************/
		354
		355	typedef struct
		356	{
		357	WL head;
		358	unsigned char events;
		359	unsigned char reify;
		360	#if EV_SELECT_IS_WINSOCKET
		361	SOCKET handle;
		362	#endif
		363	} ANFD;
		364
		365	typedef struct
		366	{
		367	W w;
		368	int events;
		369	} ANPENDING;
		370
		371	#if EV_USE_INOTIFY
		372	typedef struct
		373	{
		374	WL head;
		375	} ANFS;
		376	#endif
		377
		378	#if EV_MULTIPLICITY
		379
		380	struct ev_loop
		381	{
		382	ev_tstamp ev_rt_now;
		383	#define ev_rt_now ((loop)->ev_rt_now)
		384	#define VAR(name,decl) decl;
		385	#include "ev_vars.h"
		386	#undef VAR
		387	};
		388	#include "ev_wrap.h"
		389
		390	static struct ev_loop default_loop_struct;
		391	struct ev_loop *ev_default_loop_ptr;
		392
		393	#else
		394
119	ev_tstamp ev_now;	395	ev_tstamp ev_rt_now;
120	int ev_method;	396	#define VAR(name,decl) static decl;
		397	#include "ev_vars.h"
		398	#undef VAR
121		399
122	static int have_monotonic; /* runtime */	400	static int ev_default_loop_ptr;
123		401
124	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	402	#endif
125	static void (*method_modify)(int fd, int oev, int nev);
126	static void (*method_poll)(ev_tstamp timeout);
127		403
128	/*****************************************************************************/	404	/*****************************************************************************/
129		405
130	ev_tstamp	406	ev_tstamp
131	ev_time (void)	407	ev_time (void)
…		…
139	gettimeofday (&tv, 0);	415	gettimeofday (&tv, 0);
140	return tv.tv_sec + tv.tv_usec * 1e-6;	416	return tv.tv_sec + tv.tv_usec * 1e-6;
141	#endif	417	#endif
142	}	418	}
143		419
144	static ev_tstamp	420	ev_tstamp inline_size
145	get_clock (void)	421	get_clock (void)
146	{	422	{
147	#if EV_USE_MONOTONIC	423	#if EV_USE_MONOTONIC
148	if (expect_true (have_monotonic))	424	if (expect_true (have_monotonic))
149	{	425	{
…		…
154	#endif	430	#endif
155		431
156	return ev_time ();	432	return ev_time ();
157	}	433	}
158		434
159	#define array_roundsize(base,n) ((n) | 4 & ~3)	435	#if EV_MULTIPLICITY
		436	ev_tstamp
		437	ev_now (EV_P)
		438	{
		439	return ev_rt_now;
		440	}
		441	#endif
160		442
161	#define array_needsize(base,cur,cnt,init) \	443	void
162	if (expect_false ((cnt) > cur)) \	444	ev_sleep (ev_tstamp delay)
163	{ \	445	{
164	int newcnt = cur; \	446	if (delay > 0.)
165	do \
166	{ \
167	newcnt = array_roundsize (base, newcnt << 1); \
168	} \
169	while ((cnt) > newcnt); \
170	\
171	base = realloc (base, sizeof (*base) * (newcnt)); \
172	init (base + cur, newcnt - cur); \
173	cur = newcnt; \
174	}	447	{
		448	#if EV_USE_NANOSLEEP
		449	struct timespec ts;
		450
		451	ts.tv_sec = (time_t)delay;
		452	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		453
		454	nanosleep (&ts, 0);
		455	#elif defined(_WIN32)
		456	Sleep (delay * 1e3);
		457	#else
		458	struct timeval tv;
		459
		460	tv.tv_sec = (time_t)delay;
		461	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		462
		463	select (0, 0, 0, 0, &tv);
		464	#endif
		465	}
		466	}
175		467
176	/*****************************************************************************/	468	/*****************************************************************************/
177		469
178	typedef struct	470	int inline_size
		471	array_nextsize (int elem, int cur, int cnt)
179	{	472	{
180	struct ev_io *head;	473	int ncur = cur + 1;
181	unsigned char events;
182	unsigned char reify;
183	} ANFD;
184		474
185	static ANFD *anfds;	475	do
186	static int anfdmax;	476	ncur <<= 1;
		477	while (cnt > ncur);
187		478
188	static void	479	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		480	if (elem * ncur > 4096)
		481	{
		482	ncur *= elem;
		483	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		484	ncur = ncur - sizeof (void *) * 4;
		485	ncur /= elem;
		486	}
		487
		488	return ncur;
		489	}
		490
		491	static noinline void *
		492	array_realloc (int elem, void *base, int *cur, int cnt)
		493	{
		494	*cur = array_nextsize (elem, *cur, cnt);
		495	return ev_realloc (base, elem * *cur);
		496	}
		497
		498	#define array_needsize(type,base,cur,cnt,init) \
		499	if (expect_false ((cnt) > (cur))) \
		500	{ \
		501	int ocur_ = (cur); \
		502	(base) = (type *)array_realloc \
		503	(sizeof (type), (base), &(cur), (cnt)); \
		504	init ((base) + (ocur_), (cur) - ocur_); \
		505	}
		506
		507	#if 0
		508	#define array_slim(type,stem) \
		509	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		510	{ \
		511	stem ## max = array_roundsize (stem ## cnt >> 1); \
		512	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		513	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		514	}
		515	#endif
		516
		517	#define array_free(stem, idx) \
		518	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		519
		520	/*****************************************************************************/
		521
		522	void noinline
		523	ev_feed_event (EV_P_ void *w, int revents)
		524	{
		525	W w_ = (W)w;
		526	int pri = ABSPRI (w_);
		527
		528	if (expect_false (w_->pending))
		529	pendings [pri][w_->pending - 1].events |= revents;
		530	else
		531	{
		532	w_->pending = ++pendingcnt [pri];
		533	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		534	pendings [pri][w_->pending - 1].w = w_;
		535	pendings [pri][w_->pending - 1].events = revents;
		536	}
		537	}
		538
		539	void inline_speed
		540	queue_events (EV_P_ W *events, int eventcnt, int type)
		541	{
		542	int i;
		543
		544	for (i = 0; i < eventcnt; ++i)
		545	ev_feed_event (EV_A_ events [i], type);
		546	}
		547
		548	/*****************************************************************************/
		549
		550	void inline_size
189	anfds_init (ANFD *base, int count)	551	anfds_init (ANFD *base, int count)
190	{	552	{
191	while (count--)	553	while (count--)
192	{	554	{
193	base->head = 0;	555	base->head = 0;
…		…
196		558
197	++base;	559	++base;
198	}	560	}
199	}	561	}
200		562
201	typedef struct	563	void inline_speed
202	{
203	W w;
204	int events;
205	} ANPENDING;
206
207	static ANPENDING *pendings [NUMPRI];
208	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
209
210	static void
211	event (W w, int events)
212	{
213	if (w->pending)
214	{
215	pendings [ABSPRI (w)][w->pending - 1].events |= events;
216	return;
217	}
218
219	w->pending = ++pendingcnt [ABSPRI (w)];
220	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
221	pendings [ABSPRI (w)][w->pending - 1].w = w;
222	pendings [ABSPRI (w)][w->pending - 1].events = events;
223	}
224
225	static void
226	queue_events (W *events, int eventcnt, int type)
227	{
228	int i;
229
230	for (i = 0; i < eventcnt; ++i)
231	event (events [i], type);
232	}
233
234	static void
235	fd_event (int fd, int events)	564	fd_event (EV_P_ int fd, int revents)
236	{	565	{
237	ANFD *anfd = anfds + fd;	566	ANFD *anfd = anfds + fd;
238	struct ev_io *w;	567	ev_io *w;
239		568
240	for (w = anfd->head; w; w = w->next)	569	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
241	{	570	{
242	int ev = w->events & events;	571	int ev = w->events & revents;
243		572
244	if (ev)	573	if (ev)
245	event ((W)w, ev);	574	ev_feed_event (EV_A_ (W)w, ev);
246	}	575	}
247	}	576	}
248		577
249	/*****************************************************************************/	578	void
		579	ev_feed_fd_event (EV_P_ int fd, int revents)
		580	{
		581	if (fd >= 0 && fd < anfdmax)
		582	fd_event (EV_A_ fd, revents);
		583	}
250		584
251	static int *fdchanges;	585	void inline_size
252	static int fdchangemax, fdchangecnt;	586	fd_reify (EV_P)
253
254	static void
255	fd_reify (void)
256	{	587	{
257	int i;	588	int i;
258		589
259	for (i = 0; i < fdchangecnt; ++i)	590	for (i = 0; i < fdchangecnt; ++i)
260	{	591	{
261	int fd = fdchanges [i];	592	int fd = fdchanges [i];
262	ANFD *anfd = anfds + fd;	593	ANFD *anfd = anfds + fd;
263	struct ev_io *w;	594	ev_io *w;
264		595
265	int events = 0;	596	unsigned char events = 0;
266		597
267	for (w = anfd->head; w; w = w->next)	598	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
268	events |= w->events;	599	events |= (unsigned char)w->events;
269		600
270	anfd->reify = 0;	601	#if EV_SELECT_IS_WINSOCKET
271		602	if (events)
272	if (anfd->events != events)
273	{	603	{
274	method_modify (fd, anfd->events, events);	604	unsigned long argp;
275	anfd->events = events;	605	#ifdef EV_FD_TO_WIN32_HANDLE
		606	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		607	#else
		608	anfd->handle = _get_osfhandle (fd);
		609	#endif
		610	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
276	}	611	}
		612	#endif
		613
		614	{
		615	unsigned char o_events = anfd->events;
		616	unsigned char o_reify = anfd->reify;
		617
		618	anfd->reify = 0;
		619	anfd->events = events;
		620
		621	if (o_events != events || o_reify & EV_IOFDSET)
		622	backend_modify (EV_A_ fd, o_events, events);
		623	}
277	}	624	}
278		625
279	fdchangecnt = 0;	626	fdchangecnt = 0;
280	}	627	}
281		628
282	static void	629	void inline_size
283	fd_change (int fd)	630	fd_change (EV_P_ int fd, int flags)
284	{	631	{
285	if (anfds [fd].reify || fdchangecnt < 0)	632	unsigned char reify = anfds [fd].reify;
286	return;
287
288	anfds [fd].reify = 1;	633	anfds [fd].reify |= flags;
289		634
		635	if (expect_true (!reify))
		636	{
290	++fdchangecnt;	637	++fdchangecnt;
291	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	638	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
292	fdchanges [fdchangecnt - 1] = fd;	639	fdchanges [fdchangecnt - 1] = fd;
		640	}
293	}	641	}
294		642
295	static void	643	void inline_speed
296	fd_kill (int fd)	644	fd_kill (EV_P_ int fd)
297	{	645	{
298	struct ev_io *w;	646	ev_io *w;
299		647
300	printf ("killing fd %d\n", fd);//D
301	while ((w = anfds [fd].head))	648	while ((w = (ev_io *)anfds [fd].head))
302	{	649	{
303	ev_io_stop (w);	650	ev_io_stop (EV_A_ w);
304	event ((W)w, EV_ERROR | EV_READ | EV_WRITE);	651	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
305	}	652	}
		653	}
		654
		655	int inline_size
		656	fd_valid (int fd)
		657	{
		658	#ifdef _WIN32
		659	return _get_osfhandle (fd) != -1;
		660	#else
		661	return fcntl (fd, F_GETFD) != -1;
		662	#endif
306	}	663	}
307		664
308	/* called on EBADF to verify fds */	665	/* called on EBADF to verify fds */
309	static void	666	static void noinline
310	fd_ebadf (void)	667	fd_ebadf (EV_P)
311	{	668	{
312	int fd;	669	int fd;
313		670
314	for (fd = 0; fd < anfdmax; ++fd)	671	for (fd = 0; fd < anfdmax; ++fd)
315	if (anfds [fd].events)	672	if (anfds [fd].events)
316	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	673	if (!fd_valid (fd) == -1 && errno == EBADF)
317	fd_kill (fd);	674	fd_kill (EV_A_ fd);
318	}	675	}
319		676
320	/* called on ENOMEM in select/poll to kill some fds and retry */	677	/* called on ENOMEM in select/poll to kill some fds and retry */
321	static void	678	static void noinline
322	fd_enomem (void)	679	fd_enomem (EV_P)
323	{	680	{
324	int fd = anfdmax;	681	int fd;
325		682
326	while (fd--)	683	for (fd = anfdmax; fd--; )
327	if (anfds [fd].events)	684	if (anfds [fd].events)
328	{	685	{
329	close (fd);
330	fd_kill (fd);	686	fd_kill (EV_A_ fd);
331	return;	687	return;
332	}	688	}
333	}	689	}
334		690
		691	/* usually called after fork if backend needs to re-arm all fds from scratch */
		692	static void noinline
		693	fd_rearm_all (EV_P)
		694	{
		695	int fd;
		696
		697	for (fd = 0; fd < anfdmax; ++fd)
		698	if (anfds [fd].events)
		699	{
		700	anfds [fd].events = 0;
		701	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		702	}
		703	}
		704
335	/*****************************************************************************/	705	/*****************************************************************************/
336		706
337	static struct ev_timer **timers;	707	void inline_speed
338	static int timermax, timercnt;
339
340	static struct ev_periodic **periodics;
341	static int periodicmax, periodiccnt;
342
343	static void
344	upheap (WT *timers, int k)	708	upheap (WT *heap, int k)
345	{	709	{
346	WT w = timers [k];	710	WT w = heap [k];
347		711
348	while (k && timers [k >> 1]->at > w->at)	712	while (k)
349	{
350	timers [k] = timers [k >> 1];
351	timers [k]->active = k + 1;
352	k >>= 1;
353	}	713	{
354
355	timers [k] = w;
356	timers [k]->active = k + 1;
357
358	}
359
360	static void
361	downheap (WT *timers, int N, int k)
362	{
363	WT w = timers [k];
364
365	while (k < (N >> 1))
366	{
367	int j = k << 1;	714	int p = (k - 1) >> 1;
368		715
369	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	716	if (heap [p]->at <= w->at)
370	++j;
371
372	if (w->at <= timers [j]->at)
373	break;	717	break;
374		718
375	timers [k] = timers [j];	719	heap [k] = heap [p];
376	timers [k]->active = k + 1;	720	((W)heap [k])->active = k + 1;
377	k = j;	721	k = p;
		722	}
		723
		724	heap [k] = w;
		725	((W)heap [k])->active = k + 1;
		726	}
		727
		728	void inline_speed
		729	downheap (WT *heap, int N, int k)
		730	{
		731	WT w = heap [k];
		732
		733	for (;;)
378	}	734	{
		735	int c = (k << 1) + 1;
379		736
		737	if (c >= N)
		738	break;
		739
		740	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		741	? 1 : 0;
		742
		743	if (w->at <= heap [c]->at)
		744	break;
		745
		746	heap [k] = heap [c];
		747	((W)heap [k])->active = k + 1;
		748
		749	k = c;
		750	}
		751
380	timers [k] = w;	752	heap [k] = w;
381	timers [k]->active = k + 1;	753	((W)heap [k])->active = k + 1;
		754	}
		755
		756	void inline_size
		757	adjustheap (WT *heap, int N, int k)
		758	{
		759	upheap (heap, k);
		760	downheap (heap, N, k);
382	}	761	}
383		762
384	/*****************************************************************************/	763	/*****************************************************************************/
385		764
386	typedef struct	765	typedef struct
387	{	766	{
388	struct ev_signal *head;	767	WL head;
389	sig_atomic_t volatile gotsig;	768	EV_ATOMIC_T gotsig;
390	} ANSIG;	769	} ANSIG;
391		770
392	static ANSIG *signals;	771	static ANSIG *signals;
393	static int signalmax;	772	static int signalmax;
394		773
395	static int sigpipe [2];	774	static EV_ATOMIC_T gotsig;
396	static sig_atomic_t volatile gotsig;
397	static struct ev_io sigev;
398		775
399	static void	776	void inline_size
400	signals_init (ANSIG *base, int count)	777	signals_init (ANSIG *base, int count)
401	{	778	{
402	while (count--)	779	while (count--)
403	{	780	{
404	base->head = 0;	781	base->head = 0;
…		…
406		783
407	++base;	784	++base;
408	}	785	}
409	}	786	}
410		787
		788	/*****************************************************************************/
		789
		790	void inline_speed
		791	fd_intern (int fd)
		792	{
		793	#ifdef _WIN32
		794	int arg = 1;
		795	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		796	#else
		797	fcntl (fd, F_SETFD, FD_CLOEXEC);
		798	fcntl (fd, F_SETFL, O_NONBLOCK);
		799	#endif
		800	}
		801
		802	static void noinline
		803	evpipe_init (EV_P)
		804	{
		805	if (!ev_is_active (&pipeev))
		806	{
		807	while (pipe (evpipe))
		808	syserr ("(libev) error creating signal/async pipe");
		809
		810	fd_intern (evpipe [0]);
		811	fd_intern (evpipe [1]);
		812
		813	ev_io_set (&pipeev, evpipe [0], EV_READ);
		814	ev_io_start (EV_A_ &pipeev);
		815	ev_unref (EV_A); /* watcher should not keep loop alive */
		816	}
		817	}
		818
		819	void inline_size
		820	evpipe_write (EV_P_ int sig, int async)
		821	{
		822	if (!(gotasync || gotsig))
		823	{
		824	int old_errno = errno; /* save errno becaue write might clobber it */
		825
		826	if (sig) gotsig = 1;
		827	if (async) gotasync = 1;
		828
		829	write (evpipe [1], &old_errno, 1);
		830
		831	errno = old_errno;
		832	}
		833	}
		834
		835	static void
		836	pipecb (EV_P_ ev_io *iow, int revents)
		837	{
		838	{
		839	int dummy;
		840	read (evpipe [0], &dummy, 1);
		841	}
		842
		843	if (gotsig && ev_is_default_loop (EV_A))
		844	{
		845	int signum;
		846	gotsig = 0;
		847
		848	for (signum = signalmax; signum--; )
		849	if (signals [signum].gotsig)
		850	ev_feed_signal_event (EV_A_ signum + 1);
		851	}
		852
		853	#if EV_ASYNC_ENABLE
		854	if (gotasync)
		855	{
		856	int i;
		857	gotasync = 0;
		858
		859	for (i = asynccnt; i--; )
		860	if (asyncs [i]->sent)
		861	{
		862	asyncs [i]->sent = 0;
		863	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		864	}
		865	}
		866	#endif
		867	}
		868
		869	/*****************************************************************************/
		870
411	static void	871	static void
412	sighandler (int signum)	872	sighandler (int signum)
413	{	873	{
		874	#if EV_MULTIPLICITY
		875	struct ev_loop *loop = &default_loop_struct;
		876	#endif
		877
		878	#if _WIN32
		879	signal (signum, sighandler);
		880	#endif
		881
414	signals [signum - 1].gotsig = 1;	882	signals [signum - 1].gotsig = 1;
415		883	evpipe_write (EV_A_ 1, 0);
416	if (!gotsig)
417	{
418	int old_errno = errno;
419	gotsig = 1;
420	write (sigpipe [1], &signum, 1);
421	errno = old_errno;
422	}
423	}	884	}
424		885
425	static void	886	void noinline
426	sigcb (struct ev_io *iow, int revents)	887	ev_feed_signal_event (EV_P_ int signum)
427	{	888	{
428	struct ev_signal *w;	889	WL w;
		890
		891	#if EV_MULTIPLICITY
		892	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		893	#endif
		894
429	int signum;	895	--signum;
430		896
431	read (sigpipe [0], &revents, 1);	897	if (signum < 0 || signum >= signalmax)
432	gotsig = 0;	898	return;
433		899
434	for (signum = signalmax; signum--; )
435	if (signals [signum].gotsig)
436	{
437	signals [signum].gotsig = 0;	900	signals [signum].gotsig = 0;
438		901
439	for (w = signals [signum].head; w; w = w->next)	902	for (w = signals [signum].head; w; w = w->next)
440	event ((W)w, EV_SIGNAL);	903	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
441	}
442	}
443
444	static void
445	siginit (void)
446	{
447	#ifndef WIN32
448	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
449	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
450
451	/* rather than sort out wether we really need nb, set it */
452	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
453	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
454	#endif
455
456	ev_io_set (&sigev, sigpipe [0], EV_READ);
457	ev_io_start (&sigev);
458	}	904	}
459		905
460	/*****************************************************************************/	906	/*****************************************************************************/
461		907
462	static struct ev_idle **idles;	908	static WL childs [EV_PID_HASHSIZE];
463	static int idlemax, idlecnt;
464		909
465	static struct ev_prepare **prepares;
466	static int preparemax, preparecnt;
467
468	static struct ev_check **checks;
469	static int checkmax, checkcnt;
470
471	/*****************************************************************************/
472
473	static struct ev_child *childs [PID_HASHSIZE];
474	static struct ev_signal childev;
475
476	#ifndef WIN32	910	#ifndef _WIN32
		911
		912	static ev_signal childev;
		913
		914	#ifndef WIFCONTINUED
		915	# define WIFCONTINUED(status) 0
		916	#endif
		917
		918	void inline_speed
		919	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		920	{
		921	ev_child *w;
		922	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		923
		924	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		925	{
		926	if ((w->pid == pid || !w->pid)
		927	&& (!traced || (w->flags & 1)))
		928	{
		929	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
		930	w->rpid = pid;
		931	w->rstatus = status;
		932	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		933	}
		934	}
		935	}
477		936
478	#ifndef WCONTINUED	937	#ifndef WCONTINUED
479	# define WCONTINUED 0	938	# define WCONTINUED 0
480	#endif	939	#endif
481		940
482	static void	941	static void
483	child_reap (struct ev_signal *sw, int chain, int pid, int status)
484	{
485	struct ev_child *w;
486
487	for (w = childs [chain & (PID_HASHSIZE - 1)]; w; w = w->next)
488	if (w->pid == pid || !w->pid)
489	{
490	w->priority = sw->priority; /* need to do it *now* */
491	w->rpid = pid;
492	w->rstatus = status;
493	printf ("rpid %p %d %d\n", w, pid, w->pid);//D
494	event ((W)w, EV_CHILD);
495	}
496	}
497
498	static void
499	childcb (struct ev_signal *sw, int revents)	942	childcb (EV_P_ ev_signal *sw, int revents)
500	{	943	{
501	int pid, status;	944	int pid, status;
502		945
503	printf ("chld %x\n", revents);//D	946	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
504	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	947	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
505	{	948	if (!WCONTINUED
		949	|| errno != EINVAL
		950	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		951	return;
		952
506	/* make sure we are called again until all childs have been reaped */	953	/* make sure we are called again until all childs have been reaped */
		954	/* we need to do it this way so that the callback gets called before we continue */
507	event ((W)sw, EV_SIGNAL);	955	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
508		956
509	child_reap (sw, pid, pid, status);	957	child_reap (EV_A_ sw, pid, pid, status);
		958	if (EV_PID_HASHSIZE > 1)
510	child_reap (sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	959	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
511	}
512	}	960	}
513		961
514	#endif	962	#endif
515		963
516	/*****************************************************************************/	964	/*****************************************************************************/
517		965
		966	#if EV_USE_PORT
		967	# include "ev_port.c"
		968	#endif
518	#if EV_USE_KQUEUE	969	#if EV_USE_KQUEUE
519	# include "ev_kqueue.c"	970	# include "ev_kqueue.c"
520	#endif	971	#endif
521	#if EV_USE_EPOLL	972	#if EV_USE_EPOLL
522	# include "ev_epoll.c"	973	# include "ev_epoll.c"
…		…
538	ev_version_minor (void)	989	ev_version_minor (void)
539	{	990	{
540	return EV_VERSION_MINOR;	991	return EV_VERSION_MINOR;
541	}	992	}
542		993
543	/* return true if we are running with elevated privileges and ignore env variables */	994	/* return true if we are running with elevated privileges and should ignore env variables */
544	static int	995	int inline_size
545	enable_secure ()	996	enable_secure (void)
546	{	997	{
		998	#ifdef _WIN32
		999	return 0;
		1000	#else
547	return getuid () != geteuid ()	1001	return getuid () != geteuid ()
548	|| getgid () != getegid ();	1002	|| getgid () != getegid ();
		1003	#endif
549	}	1004	}
550		1005
551	int ev_init (int methods)	1006	unsigned int
		1007	ev_supported_backends (void)
552	{	1008	{
553	if (!ev_method)	1009	unsigned int flags = 0;
		1010
		1011	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1012	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1013	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1014	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1015	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1016
		1017	return flags;
		1018	}
		1019
		1020	unsigned int
		1021	ev_recommended_backends (void)
		1022	{
		1023	unsigned int flags = ev_supported_backends ();
		1024
		1025	#ifndef __NetBSD__
		1026	/* kqueue is borked on everything but netbsd apparently */
		1027	/* it usually doesn't work correctly on anything but sockets and pipes */
		1028	flags &= ~EVBACKEND_KQUEUE;
		1029	#endif
		1030	#ifdef __APPLE__
		1031	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1032	flags &= ~EVBACKEND_POLL;
		1033	#endif
		1034
		1035	return flags;
		1036	}
		1037
		1038	unsigned int
		1039	ev_embeddable_backends (void)
		1040	{
		1041	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1042
		1043	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1044	/* please fix it and tell me how to detect the fix */
		1045	flags &= ~EVBACKEND_EPOLL;
		1046
		1047	return flags;
		1048	}
		1049
		1050	unsigned int
		1051	ev_backend (EV_P)
		1052	{
		1053	return backend;
		1054	}
		1055
		1056	unsigned int
		1057	ev_loop_count (EV_P)
		1058	{
		1059	return loop_count;
		1060	}
		1061
		1062	void
		1063	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1064	{
		1065	io_blocktime = interval;
		1066	}
		1067
		1068	void
		1069	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1070	{
		1071	timeout_blocktime = interval;
		1072	}
		1073
		1074	static void noinline
		1075	loop_init (EV_P_ unsigned int flags)
		1076	{
		1077	if (!backend)
554	{	1078	{
555	#if EV_USE_MONOTONIC	1079	#if EV_USE_MONOTONIC
556	{	1080	{
557	struct timespec ts;	1081	struct timespec ts;
558	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1082	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
559	have_monotonic = 1;	1083	have_monotonic = 1;
560	}	1084	}
561	#endif	1085	#endif
562		1086
563	ev_now = ev_time ();	1087	ev_rt_now = ev_time ();
564	now = get_clock ();	1088	mn_now = get_clock ();
565	now_floor = now;	1089	now_floor = mn_now;
566	diff = ev_now - now;	1090	rtmn_diff = ev_rt_now - mn_now;
567		1091
568	if (pipe (sigpipe))	1092	io_blocktime = 0.;
569	return 0;	1093	timeout_blocktime = 0.;
		1094	backend = 0;
		1095	backend_fd = -1;
		1096	gotasync = 0;
		1097	#if EV_USE_INOTIFY
		1098	fs_fd = -2;
		1099	#endif
570		1100
571	if (methods == EVMETHOD_AUTO)	1101	/* pid check not overridable via env */
572	if (!enable_secure () && getenv ("LIBEV_METHODS"))	1102	#ifndef _WIN32
		1103	if (flags & EVFLAG_FORKCHECK)
		1104	curpid = getpid ();
		1105	#endif
		1106
		1107	if (!(flags & EVFLAG_NOENV)
		1108	&& !enable_secure ()
		1109	&& getenv ("LIBEV_FLAGS"))
573	methods = atoi (getenv ("LIBEV_METHODS"));	1110	flags = atoi (getenv ("LIBEV_FLAGS"));
574	else
575	methods = EVMETHOD_ANY;
576		1111
577	ev_method = 0;	1112	if (!(flags & 0x0000ffffUL))
		1113	flags |= ev_recommended_backends ();
		1114
		1115	#if EV_USE_PORT
		1116	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1117	#endif
578	#if EV_USE_KQUEUE	1118	#if EV_USE_KQUEUE
579	if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);	1119	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
580	#endif	1120	#endif
581	#if EV_USE_EPOLL	1121	#if EV_USE_EPOLL
582	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);	1122	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
583	#endif	1123	#endif
584	#if EV_USE_POLL	1124	#if EV_USE_POLL
585	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);	1125	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
586	#endif	1126	#endif
587	#if EV_USE_SELECT	1127	#if EV_USE_SELECT
588	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);	1128	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
589	#endif	1129	#endif
590		1130
591	if (ev_method)	1131	ev_init (&pipeev, pipecb);
		1132	ev_set_priority (&pipeev, EV_MAXPRI);
		1133	}
		1134	}
		1135
		1136	static void noinline
		1137	loop_destroy (EV_P)
		1138	{
		1139	int i;
		1140
		1141	if (ev_is_active (&pipeev))
		1142	{
		1143	ev_ref (EV_A); /* signal watcher */
		1144	ev_io_stop (EV_A_ &pipeev);
		1145
		1146	close (evpipe [0]); evpipe [0] = 0;
		1147	close (evpipe [1]); evpipe [1] = 0;
		1148	}
		1149
		1150	#if EV_USE_INOTIFY
		1151	if (fs_fd >= 0)
		1152	close (fs_fd);
		1153	#endif
		1154
		1155	if (backend_fd >= 0)
		1156	close (backend_fd);
		1157
		1158	#if EV_USE_PORT
		1159	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1160	#endif
		1161	#if EV_USE_KQUEUE
		1162	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1163	#endif
		1164	#if EV_USE_EPOLL
		1165	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1166	#endif
		1167	#if EV_USE_POLL
		1168	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1169	#endif
		1170	#if EV_USE_SELECT
		1171	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1172	#endif
		1173
		1174	for (i = NUMPRI; i--; )
		1175	{
		1176	array_free (pending, [i]);
		1177	#if EV_IDLE_ENABLE
		1178	array_free (idle, [i]);
		1179	#endif
		1180	}
		1181
		1182	ev_free (anfds); anfdmax = 0;
		1183
		1184	/* have to use the microsoft-never-gets-it-right macro */
		1185	array_free (fdchange, EMPTY);
		1186	array_free (timer, EMPTY);
		1187	#if EV_PERIODIC_ENABLE
		1188	array_free (periodic, EMPTY);
		1189	#endif
		1190	#if EV_FORK_ENABLE
		1191	array_free (fork, EMPTY);
		1192	#endif
		1193	array_free (prepare, EMPTY);
		1194	array_free (check, EMPTY);
		1195	#if EV_ASYNC_ENABLE
		1196	array_free (async, EMPTY);
		1197	#endif
		1198
		1199	backend = 0;
		1200	}
		1201
		1202	void inline_size infy_fork (EV_P);
		1203
		1204	void inline_size
		1205	loop_fork (EV_P)
		1206	{
		1207	#if EV_USE_PORT
		1208	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1209	#endif
		1210	#if EV_USE_KQUEUE
		1211	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1212	#endif
		1213	#if EV_USE_EPOLL
		1214	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1215	#endif
		1216	#if EV_USE_INOTIFY
		1217	infy_fork (EV_A);
		1218	#endif
		1219
		1220	if (ev_is_active (&pipeev))
		1221	{
		1222	/* this "locks" the handlers against writing to the pipe */
		1223	/* while we modify the fd vars */
		1224	gotsig = 1;
		1225	#if EV_ASYNC_ENABLE
		1226	gotasync = 1;
		1227	#endif
		1228
		1229	ev_ref (EV_A);
		1230	ev_io_stop (EV_A_ &pipeev);
		1231	close (evpipe [0]);
		1232	close (evpipe [1]);
		1233
		1234	evpipe_init (EV_A);
		1235	/* now iterate over everything, in case we missed something */
		1236	pipecb (EV_A_ &pipeev, EV_READ);
		1237	}
		1238
		1239	postfork = 0;
		1240	}
		1241
		1242	#if EV_MULTIPLICITY
		1243	struct ev_loop *
		1244	ev_loop_new (unsigned int flags)
		1245	{
		1246	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1247
		1248	memset (loop, 0, sizeof (struct ev_loop));
		1249
		1250	loop_init (EV_A_ flags);
		1251
		1252	if (ev_backend (EV_A))
		1253	return loop;
		1254
		1255	return 0;
		1256	}
		1257
		1258	void
		1259	ev_loop_destroy (EV_P)
		1260	{
		1261	loop_destroy (EV_A);
		1262	ev_free (loop);
		1263	}
		1264
		1265	void
		1266	ev_loop_fork (EV_P)
		1267	{
		1268	postfork = 1; /* must be in line with ev_default_fork */
		1269	}
		1270
		1271	#endif
		1272
		1273	#if EV_MULTIPLICITY
		1274	struct ev_loop *
		1275	ev_default_loop_init (unsigned int flags)
		1276	#else
		1277	int
		1278	ev_default_loop (unsigned int flags)
		1279	#endif
		1280	{
		1281	if (!ev_default_loop_ptr)
		1282	{
		1283	#if EV_MULTIPLICITY
		1284	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1285	#else
		1286	ev_default_loop_ptr = 1;
		1287	#endif
		1288
		1289	loop_init (EV_A_ flags);
		1290
		1291	if (ev_backend (EV_A))
592	{	1292	{
593	ev_watcher_init (&sigev, sigcb);
594	ev_set_priority (&sigev, EV_MAXPRI);
595	siginit ();
596
597	#ifndef WIN32	1293	#ifndef _WIN32
598	ev_signal_init (&childev, childcb, SIGCHLD);	1294	ev_signal_init (&childev, childcb, SIGCHLD);
599	ev_set_priority (&childev, EV_MAXPRI);	1295	ev_set_priority (&childev, EV_MAXPRI);
600	ev_signal_start (&childev);	1296	ev_signal_start (EV_A_ &childev);
		1297	ev_unref (EV_A); /* child watcher should not keep loop alive */
601	#endif	1298	#endif
602	}	1299	}
		1300	else
		1301	ev_default_loop_ptr = 0;
603	}	1302	}
604		1303
605	return ev_method;	1304	return ev_default_loop_ptr;
		1305	}
		1306
		1307	void
		1308	ev_default_destroy (void)
		1309	{
		1310	#if EV_MULTIPLICITY
		1311	struct ev_loop *loop = ev_default_loop_ptr;
		1312	#endif
		1313
		1314	#ifndef _WIN32
		1315	ev_ref (EV_A); /* child watcher */
		1316	ev_signal_stop (EV_A_ &childev);
		1317	#endif
		1318
		1319	loop_destroy (EV_A);
		1320	}
		1321
		1322	void
		1323	ev_default_fork (void)
		1324	{
		1325	#if EV_MULTIPLICITY
		1326	struct ev_loop *loop = ev_default_loop_ptr;
		1327	#endif
		1328
		1329	if (backend)
		1330	postfork = 1; /* must be in line with ev_loop_fork */
606	}	1331	}
607		1332
608	/*****************************************************************************/	1333	/*****************************************************************************/
609		1334
610	void	1335	void
611	ev_fork_prepare (void)	1336	ev_invoke (EV_P_ void *w, int revents)
612	{	1337	{
613	/* nop */	1338	EV_CB_INVOKE ((W)w, revents);
614	}	1339	}
615		1340
616	void	1341	void inline_speed
617	ev_fork_parent (void)
618	{
619	/* nop */
620	}
621
622	void
623	ev_fork_child (void)
624	{
625	#if EV_USE_EPOLL
626	if (ev_method == EVMETHOD_EPOLL)
627	epoll_postfork_child ();
628	#endif
629
630	ev_io_stop (&sigev);
631	close (sigpipe [0]);
632	close (sigpipe [1]);
633	pipe (sigpipe);
634	siginit ();
635	}
636
637	/*****************************************************************************/
638
639	static void
640	call_pending (void)	1342	call_pending (EV_P)
641	{	1343	{
642	int pri;	1344	int pri;
643		1345
644	for (pri = NUMPRI; pri--; )	1346	for (pri = NUMPRI; pri--; )
645	while (pendingcnt [pri])	1347	while (pendingcnt [pri])
646	{	1348	{
647	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1349	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
648		1350
649	if (p->w)	1351	if (expect_true (p->w))
650	{	1352	{
		1353	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1354
651	p->w->pending = 0;	1355	p->w->pending = 0;
652	p->w->cb (p->w, p->events);	1356	EV_CB_INVOKE (p->w, p->events);
653	}	1357	}
654	}	1358	}
655	}	1359	}
656		1360
657	static void	1361	void inline_size
658	timers_reify (void)	1362	timers_reify (EV_P)
659	{	1363	{
660	while (timercnt && timers [0]->at <= now)	1364	while (timercnt && ((WT)timers [0])->at <= mn_now)
661	{	1365	{
662	struct ev_timer *w = timers [0];	1366	ev_timer *w = (ev_timer *)timers [0];
		1367
		1368	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
663		1369
664	/* first reschedule or stop timer */	1370	/* first reschedule or stop timer */
665	if (w->repeat)	1371	if (w->repeat)
666	{	1372	{
667	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1373	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1374
668	w->at = now + w->repeat;	1375	((WT)w)->at += w->repeat;
		1376	if (((WT)w)->at < mn_now)
		1377	((WT)w)->at = mn_now;
		1378
669	downheap ((WT *)timers, timercnt, 0);	1379	downheap (timers, timercnt, 0);
670	}	1380	}
671	else	1381	else
672	ev_timer_stop (w); /* nonrepeating: stop timer */	1382	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
673		1383
674	event ((W)w, EV_TIMEOUT);	1384	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
675	}	1385	}
676	}	1386	}
677		1387
678	static void	1388	#if EV_PERIODIC_ENABLE
		1389	void inline_size
679	periodics_reify (void)	1390	periodics_reify (EV_P)
680	{	1391	{
681	while (periodiccnt && periodics [0]->at <= ev_now)	1392	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
682	{	1393	{
683	struct ev_periodic *w = periodics [0];	1394	ev_periodic *w = (ev_periodic *)periodics [0];
		1395
		1396	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
684		1397
685	/* first reschedule or stop timer */	1398	/* first reschedule or stop timer */
686	if (w->interval)	1399	if (w->reschedule_cb)
687	{	1400	{
		1401	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1402	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1403	downheap (periodics, periodiccnt, 0);
		1404	}
		1405	else if (w->interval)
		1406	{
688	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1407	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1408	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
689	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	1409	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
690	downheap ((WT *)periodics, periodiccnt, 0);	1410	downheap (periodics, periodiccnt, 0);
691	}	1411	}
692	else	1412	else
693	ev_periodic_stop (w); /* nonrepeating: stop timer */	1413	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
694		1414
695	event ((W)w, EV_PERIODIC);	1415	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
696	}	1416	}
697	}	1417	}
698		1418
699	static void	1419	static void noinline
700	periodics_reschedule (ev_tstamp diff)	1420	periodics_reschedule (EV_P)
701	{	1421	{
702	int i;	1422	int i;
703		1423
704	/* adjust periodics after time jump */	1424	/* adjust periodics after time jump */
705	for (i = 0; i < periodiccnt; ++i)	1425	for (i = 0; i < periodiccnt; ++i)
706	{	1426	{
707	struct ev_periodic *w = periodics [i];	1427	ev_periodic *w = (ev_periodic *)periodics [i];
708		1428
		1429	if (w->reschedule_cb)
		1430	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
709	if (w->interval)	1431	else if (w->interval)
		1432	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1433	}
		1434
		1435	/* now rebuild the heap */
		1436	for (i = periodiccnt >> 1; i--; )
		1437	downheap (periodics, periodiccnt, i);
		1438	}
		1439	#endif
		1440
		1441	#if EV_IDLE_ENABLE
		1442	void inline_size
		1443	idle_reify (EV_P)
		1444	{
		1445	if (expect_false (idleall))
		1446	{
		1447	int pri;
		1448
		1449	for (pri = NUMPRI; pri--; )
710	{	1450	{
711	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1451	if (pendingcnt [pri])
		1452	break;
712		1453
713	if (fabs (diff) >= 1e-4)	1454	if (idlecnt [pri])
714	{	1455	{
715	ev_periodic_stop (w);	1456	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
716	ev_periodic_start (w);	1457	break;
717
718	i = 0; /* restart loop, inefficient, but time jumps should be rare */
719	}	1458	}
720	}	1459	}
721	}	1460	}
722	}	1461	}
		1462	#endif
723		1463
724	static int	1464	void inline_speed
725	time_update_monotonic (void)	1465	time_update (EV_P_ ev_tstamp max_block)
726	{
727	now = get_clock ();
728
729	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))
730	{
731	ev_now = now + diff;
732	return 0;
733	}
734	else
735	{
736	now_floor = now;
737	ev_now = ev_time ();
738	return 1;
739	}
740	}
741
742	static void
743	time_update (void)
744	{	1466	{
745	int i;	1467	int i;
746		1468
747	#if EV_USE_MONOTONIC	1469	#if EV_USE_MONOTONIC
748	if (expect_true (have_monotonic))	1470	if (expect_true (have_monotonic))
749	{	1471	{
750	if (time_update_monotonic ())	1472	ev_tstamp odiff = rtmn_diff;
		1473
		1474	mn_now = get_clock ();
		1475
		1476	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1477	/* interpolate in the meantime */
		1478	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
751	{	1479	{
752	ev_tstamp odiff = diff;	1480	ev_rt_now = rtmn_diff + mn_now;
753		1481	return;
754	for (i = 4; --i; ) /* loop a few times, before making important decisions */
755	{
756	diff = ev_now - now;
757
758	if (fabs (odiff - diff) < MIN_TIMEJUMP)
759	return; /* all is well */
760
761	ev_now = ev_time ();
762	now = get_clock ();
763	now_floor = now;
764	}
765
766	periodics_reschedule (diff - odiff);
767	/* no timer adjustment, as the monotonic clock doesn't jump */
768	}	1482	}
		1483
		1484	now_floor = mn_now;
		1485	ev_rt_now = ev_time ();
		1486
		1487	/* loop a few times, before making important decisions.
		1488	* on the choice of "4": one iteration isn't enough,
		1489	* in case we get preempted during the calls to
		1490	* ev_time and get_clock. a second call is almost guaranteed
		1491	* to succeed in that case, though. and looping a few more times
		1492	* doesn't hurt either as we only do this on time-jumps or
		1493	* in the unlikely event of having been preempted here.
		1494	*/
		1495	for (i = 4; --i; )
		1496	{
		1497	rtmn_diff = ev_rt_now - mn_now;
		1498
		1499	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1500	return; /* all is well */
		1501
		1502	ev_rt_now = ev_time ();
		1503	mn_now = get_clock ();
		1504	now_floor = mn_now;
		1505	}
		1506
		1507	# if EV_PERIODIC_ENABLE
		1508	periodics_reschedule (EV_A);
		1509	# endif
		1510	/* no timer adjustment, as the monotonic clock doesn't jump */
		1511	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
769	}	1512	}
770	else	1513	else
771	#endif	1514	#endif
772	{	1515	{
773	ev_now = ev_time ();	1516	ev_rt_now = ev_time ();
774		1517
775	if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1518	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
776	{	1519	{
		1520	#if EV_PERIODIC_ENABLE
777	periodics_reschedule (ev_now - now);	1521	periodics_reschedule (EV_A);
778		1522	#endif
779	/* adjust timers. this is easy, as the offset is the same for all */	1523	/* adjust timers. this is easy, as the offset is the same for all of them */
780	for (i = 0; i < timercnt; ++i)	1524	for (i = 0; i < timercnt; ++i)
781	timers [i]->at += diff;	1525	((WT)timers [i])->at += ev_rt_now - mn_now;
782	}	1526	}
783		1527
784	now = ev_now;	1528	mn_now = ev_rt_now;
785	}	1529	}
786	}	1530	}
787		1531
788	int ev_loop_done;	1532	void
		1533	ev_ref (EV_P)
		1534	{
		1535	++activecnt;
		1536	}
789		1537
		1538	void
		1539	ev_unref (EV_P)
		1540	{
		1541	--activecnt;
		1542	}
		1543
		1544	static int loop_done;
		1545
		1546	void
790	void ev_loop (int flags)	1547	ev_loop (EV_P_ int flags)
791	{	1548	{
792	double block;
793	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1549	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1550	? EVUNLOOP_ONE
		1551	: EVUNLOOP_CANCEL;
		1552
		1553	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
794		1554
795	do	1555	do
796	{	1556	{
		1557	#ifndef _WIN32
		1558	if (expect_false (curpid)) /* penalise the forking check even more */
		1559	if (expect_false (getpid () != curpid))
		1560	{
		1561	curpid = getpid ();
		1562	postfork = 1;
		1563	}
		1564	#endif
		1565
		1566	#if EV_FORK_ENABLE
		1567	/* we might have forked, so queue fork handlers */
		1568	if (expect_false (postfork))
		1569	if (forkcnt)
		1570	{
		1571	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1572	call_pending (EV_A);
		1573	}
		1574	#endif
		1575
797	/* queue check watchers (and execute them) */	1576	/* queue prepare watchers (and execute them) */
798	if (expect_false (preparecnt))	1577	if (expect_false (preparecnt))
799	{	1578	{
800	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1579	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
801	call_pending ();	1580	call_pending (EV_A);
802	}	1581	}
803		1582
		1583	if (expect_false (!activecnt))
		1584	break;
		1585
		1586	/* we might have forked, so reify kernel state if necessary */
		1587	if (expect_false (postfork))
		1588	loop_fork (EV_A);
		1589
804	/* update fd-related kernel structures */	1590	/* update fd-related kernel structures */
805	fd_reify ();	1591	fd_reify (EV_A);
806		1592
807	/* calculate blocking time */	1593	/* calculate blocking time */
		1594	{
		1595	ev_tstamp waittime = 0.;
		1596	ev_tstamp sleeptime = 0.;
808		1597
809	/* we only need this for !monotonic clockor timers, but as we basically	1598	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
810	always have timers, we just calculate it always */
811	#if EV_USE_MONOTONIC
812	if (expect_true (have_monotonic))
813	time_update_monotonic ();
814	else
815	#endif
816	{	1599	{
817	ev_now = ev_time ();	1600	/* update time to cancel out callback processing overhead */
818	now = ev_now;	1601	time_update (EV_A_ 1e100);
819	}
820		1602
821	if (flags & EVLOOP_NONBLOCK || idlecnt)
822	block = 0.;
823	else
824	{
825	block = MAX_BLOCKTIME;	1603	waittime = MAX_BLOCKTIME;
826		1604
827	if (timercnt)	1605	if (timercnt)
828	{	1606	{
829	ev_tstamp to = timers [0]->at - now + method_fudge;	1607	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
830	if (block > to) block = to;	1608	if (waittime > to) waittime = to;
831	}	1609	}
832		1610
		1611	#if EV_PERIODIC_ENABLE
833	if (periodiccnt)	1612	if (periodiccnt)
834	{	1613	{
835	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1614	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
836	if (block > to) block = to;	1615	if (waittime > to) waittime = to;
837	}	1616	}
		1617	#endif
838		1618
839	if (block < 0.) block = 0.;	1619	if (expect_false (waittime < timeout_blocktime))
		1620	waittime = timeout_blocktime;
		1621
		1622	sleeptime = waittime - backend_fudge;
		1623
		1624	if (expect_true (sleeptime > io_blocktime))
		1625	sleeptime = io_blocktime;
		1626
		1627	if (sleeptime)
		1628	{
		1629	ev_sleep (sleeptime);
		1630	waittime -= sleeptime;
		1631	}
840	}	1632	}
841		1633
842	method_poll (block);	1634	++loop_count;
		1635	backend_poll (EV_A_ waittime);
843		1636
844	/* update ev_now, do magic */	1637	/* update ev_rt_now, do magic */
845	time_update ();	1638	time_update (EV_A_ waittime + sleeptime);
		1639	}
846		1640
847	/* queue pending timers and reschedule them */	1641	/* queue pending timers and reschedule them */
848	timers_reify (); /* relative timers called last */	1642	timers_reify (EV_A); /* relative timers called last */
		1643	#if EV_PERIODIC_ENABLE
849	periodics_reify (); /* absolute timers called first */	1644	periodics_reify (EV_A); /* absolute timers called first */
		1645	#endif
850		1646
		1647	#if EV_IDLE_ENABLE
851	/* queue idle watchers unless io or timers are pending */	1648	/* queue idle watchers unless other events are pending */
852	if (!pendingcnt)	1649	idle_reify (EV_A);
853	queue_events ((W *)idles, idlecnt, EV_IDLE);	1650	#endif
854		1651
855	/* queue check watchers, to be executed first */	1652	/* queue check watchers, to be executed first */
856	if (checkcnt)	1653	if (expect_false (checkcnt))
857	queue_events ((W *)checks, checkcnt, EV_CHECK);	1654	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
858		1655
859	call_pending ();	1656	call_pending (EV_A);
860	}
861	while (!ev_loop_done);
862		1657
863	if (ev_loop_done != 2)	1658	}
		1659	while (expect_true (activecnt && !loop_done));
		1660
		1661	if (loop_done == EVUNLOOP_ONE)
		1662	loop_done = EVUNLOOP_CANCEL;
		1663	}
		1664
		1665	void
		1666	ev_unloop (EV_P_ int how)
		1667	{
864	ev_loop_done = 0;	1668	loop_done = how;
865	}	1669	}
866		1670
867	/*****************************************************************************/	1671	/*****************************************************************************/
868		1672
869	static void	1673	void inline_size
870	wlist_add (WL *head, WL elem)	1674	wlist_add (WL *head, WL elem)
871	{	1675	{
872	elem->next = *head;	1676	elem->next = *head;
873	*head = elem;	1677	*head = elem;
874	}	1678	}
875		1679
876	static void	1680	void inline_size
877	wlist_del (WL *head, WL elem)	1681	wlist_del (WL *head, WL elem)
878	{	1682	{
879	while (*head)	1683	while (*head)
880	{	1684	{
881	if (*head == elem)	1685	if (*head == elem)
…		…
886		1690
887	head = &(*head)->next;	1691	head = &(*head)->next;
888	}	1692	}
889	}	1693	}
890		1694
891	static void	1695	void inline_speed
892	ev_clear_pending (W w)	1696	clear_pending (EV_P_ W w)
893	{	1697	{
894	if (w->pending)	1698	if (w->pending)
895	{	1699	{
896	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1700	pendings [ABSPRI (w)][w->pending - 1].w = 0;
897	w->pending = 0;	1701	w->pending = 0;
898	}	1702	}
899	}	1703	}
900		1704
901	static void	1705	int
		1706	ev_clear_pending (EV_P_ void *w)
		1707	{
		1708	W w_ = (W)w;
		1709	int pending = w_->pending;
		1710
		1711	if (expect_true (pending))
		1712	{
		1713	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1714	w_->pending = 0;
		1715	p->w = 0;
		1716	return p->events;
		1717	}
		1718	else
		1719	return 0;
		1720	}
		1721
		1722	void inline_size
		1723	pri_adjust (EV_P_ W w)
		1724	{
		1725	int pri = w->priority;
		1726	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1727	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1728	w->priority = pri;
		1729	}
		1730
		1731	void inline_speed
902	ev_start (W w, int active)	1732	ev_start (EV_P_ W w, int active)
903	{	1733	{
904	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1734	pri_adjust (EV_A_ w);
905	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
906
907	w->active = active;	1735	w->active = active;
		1736	ev_ref (EV_A);
908	}	1737	}
909		1738
910	static void	1739	void inline_size
911	ev_stop (W w)	1740	ev_stop (EV_P_ W w)
912	{	1741	{
		1742	ev_unref (EV_A);
913	w->active = 0;	1743	w->active = 0;
914	}	1744	}
915		1745
916	/*****************************************************************************/	1746	/*****************************************************************************/
917		1747
918	void	1748	void noinline
919	ev_io_start (struct ev_io *w)	1749	ev_io_start (EV_P_ ev_io *w)
920	{	1750	{
921	int fd = w->fd;	1751	int fd = w->fd;
922		1752
923	if (ev_is_active (w))	1753	if (expect_false (ev_is_active (w)))
924	return;	1754	return;
925		1755
926	assert (("ev_io_start called with negative fd", fd >= 0));	1756	assert (("ev_io_start called with negative fd", fd >= 0));
927		1757
928	ev_start ((W)w, 1);	1758	ev_start (EV_A_ (W)w, 1);
929	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1759	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
930	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1760	wlist_add (&anfds[fd].head, (WL)w);
931		1761
932	fd_change (fd);	1762	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1763	w->events &= ~EV_IOFDSET;
933	}	1764	}
934		1765
935	void	1766	void noinline
936	ev_io_stop (struct ev_io *w)	1767	ev_io_stop (EV_P_ ev_io *w)
937	{	1768	{
938	ev_clear_pending ((W)w);	1769	clear_pending (EV_A_ (W)w);
939	if (!ev_is_active (w))	1770	if (expect_false (!ev_is_active (w)))
940	return;	1771	return;
941		1772
		1773	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1774
942	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1775	wlist_del (&anfds[w->fd].head, (WL)w);
943	ev_stop ((W)w);	1776	ev_stop (EV_A_ (W)w);
944		1777
945	fd_change (w->fd);	1778	fd_change (EV_A_ w->fd, 1);
946	}	1779	}
947		1780
948	void	1781	void noinline
949	ev_timer_start (struct ev_timer *w)	1782	ev_timer_start (EV_P_ ev_timer *w)
950	{	1783	{
951	if (ev_is_active (w))	1784	if (expect_false (ev_is_active (w)))
952	return;	1785	return;
953		1786
954	w->at += now;	1787	((WT)w)->at += mn_now;
955		1788
956	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1789	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
957		1790
958	ev_start ((W)w, ++timercnt);	1791	ev_start (EV_A_ (W)w, ++timercnt);
959	array_needsize (timers, timermax, timercnt, );	1792	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
960	timers [timercnt - 1] = w;	1793	timers [timercnt - 1] = (WT)w;
961	upheap ((WT *)timers, timercnt - 1);	1794	upheap (timers, timercnt - 1);
962	}
963		1795
964	void	1796	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1797	}
		1798
		1799	void noinline
965	ev_timer_stop (struct ev_timer *w)	1800	ev_timer_stop (EV_P_ ev_timer *w)
966	{	1801	{
967	ev_clear_pending ((W)w);	1802	clear_pending (EV_A_ (W)w);
968	if (!ev_is_active (w))	1803	if (expect_false (!ev_is_active (w)))
969	return;	1804	return;
970		1805
971	if (w->active < timercnt--)	1806	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1807
		1808	{
		1809	int active = ((W)w)->active;
		1810
		1811	if (expect_true (--active < --timercnt))
972	{	1812	{
973	timers [w->active - 1] = timers [timercnt];	1813	timers [active] = timers [timercnt];
974	downheap ((WT *)timers, timercnt, w->active - 1);	1814	adjustheap (timers, timercnt, active);
975	}	1815	}
		1816	}
976		1817
977	w->at = w->repeat;	1818	((WT)w)->at -= mn_now;
978		1819
979	ev_stop ((W)w);	1820	ev_stop (EV_A_ (W)w);
980	}	1821	}
981		1822
982	void	1823	void noinline
983	ev_timer_again (struct ev_timer *w)	1824	ev_timer_again (EV_P_ ev_timer *w)
984	{	1825	{
985	if (ev_is_active (w))	1826	if (ev_is_active (w))
986	{	1827	{
987	if (w->repeat)	1828	if (w->repeat)
988	{	1829	{
989	w->at = now + w->repeat;	1830	((WT)w)->at = mn_now + w->repeat;
990	downheap ((WT *)timers, timercnt, w->active - 1);	1831	adjustheap (timers, timercnt, ((W)w)->active - 1);
991	}	1832	}
992	else	1833	else
993	ev_timer_stop (w);	1834	ev_timer_stop (EV_A_ w);
994	}	1835	}
995	else if (w->repeat)	1836	else if (w->repeat)
		1837	{
		1838	w->at = w->repeat;
996	ev_timer_start (w);	1839	ev_timer_start (EV_A_ w);
		1840	}
997	}	1841	}
998		1842
999	void	1843	#if EV_PERIODIC_ENABLE
		1844	void noinline
1000	ev_periodic_start (struct ev_periodic *w)	1845	ev_periodic_start (EV_P_ ev_periodic *w)
1001	{	1846	{
1002	if (ev_is_active (w))	1847	if (expect_false (ev_is_active (w)))
1003	return;	1848	return;
1004		1849
		1850	if (w->reschedule_cb)
		1851	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1852	else if (w->interval)
		1853	{
1005	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1854	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1006
1007	/* this formula differs from the one in periodic_reify because we do not always round up */	1855	/* this formula differs from the one in periodic_reify because we do not always round up */
1008	if (w->interval)
1009	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1856	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1857	}
		1858	else
		1859	((WT)w)->at = w->offset;
1010		1860
1011	ev_start ((W)w, ++periodiccnt);	1861	ev_start (EV_A_ (W)w, ++periodiccnt);
1012	array_needsize (periodics, periodicmax, periodiccnt, );	1862	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
1013	periodics [periodiccnt - 1] = w;	1863	periodics [periodiccnt - 1] = (WT)w;
1014	upheap ((WT *)periodics, periodiccnt - 1);	1864	upheap (periodics, periodiccnt - 1);
1015	}
1016		1865
1017	void	1866	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1867	}
		1868
		1869	void noinline
1018	ev_periodic_stop (struct ev_periodic *w)	1870	ev_periodic_stop (EV_P_ ev_periodic *w)
1019	{	1871	{
1020	ev_clear_pending ((W)w);	1872	clear_pending (EV_A_ (W)w);
1021	if (!ev_is_active (w))	1873	if (expect_false (!ev_is_active (w)))
1022	return;	1874	return;
1023		1875
1024	if (w->active < periodiccnt--)	1876	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1877
		1878	{
		1879	int active = ((W)w)->active;
		1880
		1881	if (expect_true (--active < --periodiccnt))
1025	{	1882	{
1026	periodics [w->active - 1] = periodics [periodiccnt];	1883	periodics [active] = periodics [periodiccnt];
1027	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1884	adjustheap (periodics, periodiccnt, active);
1028	}	1885	}
		1886	}
1029		1887
1030	ev_stop ((W)w);	1888	ev_stop (EV_A_ (W)w);
1031	}	1889	}
		1890
		1891	void noinline
		1892	ev_periodic_again (EV_P_ ev_periodic *w)
		1893	{
		1894	/* TODO: use adjustheap and recalculation */
		1895	ev_periodic_stop (EV_A_ w);
		1896	ev_periodic_start (EV_A_ w);
		1897	}
		1898	#endif
1032		1899
1033	#ifndef SA_RESTART	1900	#ifndef SA_RESTART
1034	# define SA_RESTART 0	1901	# define SA_RESTART 0
1035	#endif	1902	#endif
1036		1903
1037	void	1904	void noinline
1038	ev_signal_start (struct ev_signal *w)	1905	ev_signal_start (EV_P_ ev_signal *w)
1039	{	1906	{
		1907	#if EV_MULTIPLICITY
		1908	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1909	#endif
1040	if (ev_is_active (w))	1910	if (expect_false (ev_is_active (w)))
1041	return;	1911	return;
1042		1912
1043	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1913	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1044		1914
1045	ev_start ((W)w, 1);	1915	evpipe_init (EV_A);
		1916
		1917	{
		1918	#ifndef _WIN32
		1919	sigset_t full, prev;
		1920	sigfillset (&full);
		1921	sigprocmask (SIG_SETMASK, &full, &prev);
		1922	#endif
		1923
1046	array_needsize (signals, signalmax, w->signum, signals_init);	1924	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1925
		1926	#ifndef _WIN32
		1927	sigprocmask (SIG_SETMASK, &prev, 0);
		1928	#endif
		1929	}
		1930
		1931	ev_start (EV_A_ (W)w, 1);
1047	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1932	wlist_add (&signals [w->signum - 1].head, (WL)w);
1048		1933
1049	if (!w->next)	1934	if (!((WL)w)->next)
1050	{	1935	{
		1936	#if _WIN32
		1937	signal (w->signum, sighandler);
		1938	#else
1051	struct sigaction sa;	1939	struct sigaction sa;
1052	sa.sa_handler = sighandler;	1940	sa.sa_handler = sighandler;
1053	sigfillset (&sa.sa_mask);	1941	sigfillset (&sa.sa_mask);
1054	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	1942	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1055	sigaction (w->signum, &sa, 0);	1943	sigaction (w->signum, &sa, 0);
		1944	#endif
1056	}	1945	}
1057	}	1946	}
1058		1947
1059	void	1948	void noinline
1060	ev_signal_stop (struct ev_signal *w)	1949	ev_signal_stop (EV_P_ ev_signal *w)
1061	{	1950	{
1062	ev_clear_pending ((W)w);	1951	clear_pending (EV_A_ (W)w);
1063	if (!ev_is_active (w))	1952	if (expect_false (!ev_is_active (w)))
1064	return;	1953	return;
1065		1954
1066	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1955	wlist_del (&signals [w->signum - 1].head, (WL)w);
1067	ev_stop ((W)w);	1956	ev_stop (EV_A_ (W)w);
1068		1957
1069	if (!signals [w->signum - 1].head)	1958	if (!signals [w->signum - 1].head)
1070	signal (w->signum, SIG_DFL);	1959	signal (w->signum, SIG_DFL);
1071	}	1960	}
1072		1961
1073	void	1962	void
1074	ev_idle_start (struct ev_idle *w)	1963	ev_child_start (EV_P_ ev_child *w)
1075	{	1964	{
		1965	#if EV_MULTIPLICITY
		1966	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1967	#endif
1076	if (ev_is_active (w))	1968	if (expect_false (ev_is_active (w)))
1077	return;	1969	return;
1078		1970
1079	ev_start ((W)w, ++idlecnt);	1971	ev_start (EV_A_ (W)w, 1);
1080	array_needsize (idles, idlemax, idlecnt, );	1972	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1081	idles [idlecnt - 1] = w;
1082	}	1973	}
1083		1974
1084	void	1975	void
1085	ev_idle_stop (struct ev_idle *w)	1976	ev_child_stop (EV_P_ ev_child *w)
1086	{	1977	{
1087	ev_clear_pending ((W)w);	1978	clear_pending (EV_A_ (W)w);
1088	if (ev_is_active (w))	1979	if (expect_false (!ev_is_active (w)))
1089	return;	1980	return;
1090		1981
1091	idles [w->active - 1] = idles [--idlecnt];	1982	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1092	ev_stop ((W)w);	1983	ev_stop (EV_A_ (W)w);
1093	}	1984	}
1094		1985
		1986	#if EV_STAT_ENABLE
		1987
		1988	# ifdef _WIN32
		1989	# undef lstat
		1990	# define lstat(a,b) _stati64 (a,b)
		1991	# endif
		1992
		1993	#define DEF_STAT_INTERVAL 5.0074891
		1994	#define MIN_STAT_INTERVAL 0.1074891
		1995
		1996	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1997
		1998	#if EV_USE_INOTIFY
		1999	# define EV_INOTIFY_BUFSIZE 8192
		2000
		2001	static void noinline
		2002	infy_add (EV_P_ ev_stat *w)
		2003	{
		2004	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);
		2005
		2006	if (w->wd < 0)
		2007	{
		2008	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2009
		2010	/* monitor some parent directory for speedup hints */
		2011	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2012	{
		2013	char path [4096];
		2014	strcpy (path, w->path);
		2015
		2016	do
		2017	{
		2018	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2019	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2020
		2021	char *pend = strrchr (path, '/');
		2022
		2023	if (!pend)
		2024	break; /* whoops, no '/', complain to your admin */
		2025
		2026	*pend = 0;
		2027	w->wd = inotify_add_watch (fs_fd, path, mask);
		2028	}
		2029	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2030	}
		2031	}
		2032	else
		2033	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2034
		2035	if (w->wd >= 0)
		2036	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2037	}
		2038
		2039	static void noinline
		2040	infy_del (EV_P_ ev_stat *w)
		2041	{
		2042	int slot;
		2043	int wd = w->wd;
		2044
		2045	if (wd < 0)
		2046	return;
		2047
		2048	w->wd = -2;
		2049	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2050	wlist_del (&fs_hash [slot].head, (WL)w);
		2051
		2052	/* remove this watcher, if others are watching it, they will rearm */
		2053	inotify_rm_watch (fs_fd, wd);
		2054	}
		2055
		2056	static void noinline
		2057	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2058	{
		2059	if (slot < 0)
		2060	/* overflow, need to check for all hahs slots */
		2061	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2062	infy_wd (EV_A_ slot, wd, ev);
		2063	else
		2064	{
		2065	WL w_;
		2066
		2067	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2068	{
		2069	ev_stat *w = (ev_stat *)w_;
		2070	w_ = w_->next; /* lets us remove this watcher and all before it */
		2071
		2072	if (w->wd == wd || wd == -1)
		2073	{
		2074	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2075	{
		2076	w->wd = -1;
		2077	infy_add (EV_A_ w); /* re-add, no matter what */
		2078	}
		2079
		2080	stat_timer_cb (EV_A_ &w->timer, 0);
		2081	}
		2082	}
		2083	}
		2084	}
		2085
		2086	static void
		2087	infy_cb (EV_P_ ev_io *w, int revents)
		2088	{
		2089	char buf [EV_INOTIFY_BUFSIZE];
		2090	struct inotify_event *ev = (struct inotify_event *)buf;
		2091	int ofs;
		2092	int len = read (fs_fd, buf, sizeof (buf));
		2093
		2094	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2095	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2096	}
		2097
		2098	void inline_size
		2099	infy_init (EV_P)
		2100	{
		2101	if (fs_fd != -2)
		2102	return;
		2103
		2104	fs_fd = inotify_init ();
		2105
		2106	if (fs_fd >= 0)
		2107	{
		2108	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2109	ev_set_priority (&fs_w, EV_MAXPRI);
		2110	ev_io_start (EV_A_ &fs_w);
		2111	}
		2112	}
		2113
		2114	void inline_size
		2115	infy_fork (EV_P)
		2116	{
		2117	int slot;
		2118
		2119	if (fs_fd < 0)
		2120	return;
		2121
		2122	close (fs_fd);
		2123	fs_fd = inotify_init ();
		2124
		2125	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2126	{
		2127	WL w_ = fs_hash [slot].head;
		2128	fs_hash [slot].head = 0;
		2129
		2130	while (w_)
		2131	{
		2132	ev_stat *w = (ev_stat *)w_;
		2133	w_ = w_->next; /* lets us add this watcher */
		2134
		2135	w->wd = -1;
		2136
		2137	if (fs_fd >= 0)
		2138	infy_add (EV_A_ w); /* re-add, no matter what */
		2139	else
		2140	ev_timer_start (EV_A_ &w->timer);
		2141	}
		2142
		2143	}
		2144	}
		2145
		2146	#endif
		2147
1095	void	2148	void
		2149	ev_stat_stat (EV_P_ ev_stat *w)
		2150	{
		2151	if (lstat (w->path, &w->attr) < 0)
		2152	w->attr.st_nlink = 0;
		2153	else if (!w->attr.st_nlink)
		2154	w->attr.st_nlink = 1;
		2155	}
		2156
		2157	static void noinline
		2158	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2159	{
		2160	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2161
		2162	/* we copy this here each the time so that */
		2163	/* prev has the old value when the callback gets invoked */
		2164	w->prev = w->attr;
		2165	ev_stat_stat (EV_A_ w);
		2166
		2167	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2168	if (
		2169	w->prev.st_dev != w->attr.st_dev
		2170	|| w->prev.st_ino != w->attr.st_ino
		2171	|| w->prev.st_mode != w->attr.st_mode
		2172	|| w->prev.st_nlink != w->attr.st_nlink
		2173	|| w->prev.st_uid != w->attr.st_uid
		2174	|| w->prev.st_gid != w->attr.st_gid
		2175	|| w->prev.st_rdev != w->attr.st_rdev
		2176	|| w->prev.st_size != w->attr.st_size
		2177	|| w->prev.st_atime != w->attr.st_atime
		2178	|| w->prev.st_mtime != w->attr.st_mtime
		2179	|| w->prev.st_ctime != w->attr.st_ctime
		2180	) {
		2181	#if EV_USE_INOTIFY
		2182	infy_del (EV_A_ w);
		2183	infy_add (EV_A_ w);
		2184	ev_stat_stat (EV_A_ w); /* avoid race... */
		2185	#endif
		2186
		2187	ev_feed_event (EV_A_ w, EV_STAT);
		2188	}
		2189	}
		2190
		2191	void
		2192	ev_stat_start (EV_P_ ev_stat *w)
		2193	{
		2194	if (expect_false (ev_is_active (w)))
		2195	return;
		2196
		2197	/* since we use memcmp, we need to clear any padding data etc. */
		2198	memset (&w->prev, 0, sizeof (ev_statdata));
		2199	memset (&w->attr, 0, sizeof (ev_statdata));
		2200
		2201	ev_stat_stat (EV_A_ w);
		2202
		2203	if (w->interval < MIN_STAT_INTERVAL)
		2204	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2205
		2206	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2207	ev_set_priority (&w->timer, ev_priority (w));
		2208
		2209	#if EV_USE_INOTIFY
		2210	infy_init (EV_A);
		2211
		2212	if (fs_fd >= 0)
		2213	infy_add (EV_A_ w);
		2214	else
		2215	#endif
		2216	ev_timer_start (EV_A_ &w->timer);
		2217
		2218	ev_start (EV_A_ (W)w, 1);
		2219	}
		2220
		2221	void
		2222	ev_stat_stop (EV_P_ ev_stat *w)
		2223	{
		2224	clear_pending (EV_A_ (W)w);
		2225	if (expect_false (!ev_is_active (w)))
		2226	return;
		2227
		2228	#if EV_USE_INOTIFY
		2229	infy_del (EV_A_ w);
		2230	#endif
		2231	ev_timer_stop (EV_A_ &w->timer);
		2232
		2233	ev_stop (EV_A_ (W)w);
		2234	}
		2235	#endif
		2236
		2237	#if EV_IDLE_ENABLE
		2238	void
		2239	ev_idle_start (EV_P_ ev_idle *w)
		2240	{
		2241	if (expect_false (ev_is_active (w)))
		2242	return;
		2243
		2244	pri_adjust (EV_A_ (W)w);
		2245
		2246	{
		2247	int active = ++idlecnt [ABSPRI (w)];
		2248
		2249	++idleall;
		2250	ev_start (EV_A_ (W)w, active);
		2251
		2252	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2253	idles [ABSPRI (w)][active - 1] = w;
		2254	}
		2255	}
		2256
		2257	void
		2258	ev_idle_stop (EV_P_ ev_idle *w)
		2259	{
		2260	clear_pending (EV_A_ (W)w);
		2261	if (expect_false (!ev_is_active (w)))
		2262	return;
		2263
		2264	{
		2265	int active = ((W)w)->active;
		2266
		2267	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2268	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2269
		2270	ev_stop (EV_A_ (W)w);
		2271	--idleall;
		2272	}
		2273	}
		2274	#endif
		2275
		2276	void
1096	ev_prepare_start (struct ev_prepare *w)	2277	ev_prepare_start (EV_P_ ev_prepare *w)
1097	{	2278	{
1098	if (ev_is_active (w))	2279	if (expect_false (ev_is_active (w)))
1099	return;	2280	return;
1100		2281
1101	ev_start ((W)w, ++preparecnt);	2282	ev_start (EV_A_ (W)w, ++preparecnt);
1102	array_needsize (prepares, preparemax, preparecnt, );	2283	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1103	prepares [preparecnt - 1] = w;	2284	prepares [preparecnt - 1] = w;
1104	}	2285	}
1105		2286
1106	void	2287	void
1107	ev_prepare_stop (struct ev_prepare *w)	2288	ev_prepare_stop (EV_P_ ev_prepare *w)
1108	{	2289	{
1109	ev_clear_pending ((W)w);	2290	clear_pending (EV_A_ (W)w);
1110	if (ev_is_active (w))	2291	if (expect_false (!ev_is_active (w)))
1111	return;	2292	return;
1112		2293
		2294	{
		2295	int active = ((W)w)->active;
1113	prepares [w->active - 1] = prepares [--preparecnt];	2296	prepares [active - 1] = prepares [--preparecnt];
		2297	((W)prepares [active - 1])->active = active;
		2298	}
		2299
1114	ev_stop ((W)w);	2300	ev_stop (EV_A_ (W)w);
1115	}	2301	}
1116		2302
1117	void	2303	void
1118	ev_check_start (struct ev_check *w)	2304	ev_check_start (EV_P_ ev_check *w)
1119	{	2305	{
1120	if (ev_is_active (w))	2306	if (expect_false (ev_is_active (w)))
1121	return;	2307	return;
1122		2308
1123	ev_start ((W)w, ++checkcnt);	2309	ev_start (EV_A_ (W)w, ++checkcnt);
1124	array_needsize (checks, checkmax, checkcnt, );	2310	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1125	checks [checkcnt - 1] = w;	2311	checks [checkcnt - 1] = w;
1126	}	2312	}
1127		2313
1128	void	2314	void
1129	ev_check_stop (struct ev_check *w)	2315	ev_check_stop (EV_P_ ev_check *w)
1130	{	2316	{
1131	ev_clear_pending ((W)w);	2317	clear_pending (EV_A_ (W)w);
1132	if (ev_is_active (w))	2318	if (expect_false (!ev_is_active (w)))
1133	return;	2319	return;
1134		2320
		2321	{
		2322	int active = ((W)w)->active;
1135	checks [w->active - 1] = checks [--checkcnt];	2323	checks [active - 1] = checks [--checkcnt];
		2324	((W)checks [active - 1])->active = active;
		2325	}
		2326
1136	ev_stop ((W)w);	2327	ev_stop (EV_A_ (W)w);
1137	}	2328	}
1138		2329
1139	void	2330	#if EV_EMBED_ENABLE
1140	ev_child_start (struct ev_child *w)	2331	void noinline
		2332	ev_embed_sweep (EV_P_ ev_embed *w)
1141	{	2333	{
		2334	ev_loop (w->other, EVLOOP_NONBLOCK);
		2335	}
		2336
		2337	static void
		2338	embed_io_cb (EV_P_ ev_io *io, int revents)
		2339	{
		2340	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2341
1142	if (ev_is_active (w))	2342	if (ev_cb (w))
1143	return;	2343	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2344	else
		2345	ev_loop (w->other, EVLOOP_NONBLOCK);
		2346	}
1144		2347
		2348	static void
		2349	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2350	{
		2351	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2352
		2353	{
		2354	struct ev_loop *loop = w->other;
		2355
		2356	while (fdchangecnt)
		2357	{
		2358	fd_reify (EV_A);
		2359	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2360	}
		2361	}
		2362	}
		2363
		2364	#if 0
		2365	static void
		2366	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2367	{
		2368	ev_idle_stop (EV_A_ idle);
		2369	}
		2370	#endif
		2371
		2372	void
		2373	ev_embed_start (EV_P_ ev_embed *w)
		2374	{
		2375	if (expect_false (ev_is_active (w)))
		2376	return;
		2377
		2378	{
		2379	struct ev_loop *loop = w->other;
		2380	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2381	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2382	}
		2383
		2384	ev_set_priority (&w->io, ev_priority (w));
		2385	ev_io_start (EV_A_ &w->io);
		2386
		2387	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2388	ev_set_priority (&w->prepare, EV_MINPRI);
		2389	ev_prepare_start (EV_A_ &w->prepare);
		2390
		2391	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2392
1145	ev_start ((W)w, 1);	2393	ev_start (EV_A_ (W)w, 1);
1146	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1147	}	2394	}
1148		2395
1149	void	2396	void
1150	ev_child_stop (struct ev_child *w)	2397	ev_embed_stop (EV_P_ ev_embed *w)
1151	{	2398	{
1152	ev_clear_pending ((W)w);	2399	clear_pending (EV_A_ (W)w);
1153	if (ev_is_active (w))	2400	if (expect_false (!ev_is_active (w)))
1154	return;	2401	return;
1155		2402
1156	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2403	ev_io_stop (EV_A_ &w->io);
		2404	ev_prepare_stop (EV_A_ &w->prepare);
		2405
1157	ev_stop ((W)w);	2406	ev_stop (EV_A_ (W)w);
1158	}	2407	}
		2408	#endif
		2409
		2410	#if EV_FORK_ENABLE
		2411	void
		2412	ev_fork_start (EV_P_ ev_fork *w)
		2413	{
		2414	if (expect_false (ev_is_active (w)))
		2415	return;
		2416
		2417	ev_start (EV_A_ (W)w, ++forkcnt);
		2418	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2419	forks [forkcnt - 1] = w;
		2420	}
		2421
		2422	void
		2423	ev_fork_stop (EV_P_ ev_fork *w)
		2424	{
		2425	clear_pending (EV_A_ (W)w);
		2426	if (expect_false (!ev_is_active (w)))
		2427	return;
		2428
		2429	{
		2430	int active = ((W)w)->active;
		2431	forks [active - 1] = forks [--forkcnt];
		2432	((W)forks [active - 1])->active = active;
		2433	}
		2434
		2435	ev_stop (EV_A_ (W)w);
		2436	}
		2437	#endif
		2438
		2439	#if EV_ASYNC_ENABLE
		2440	void
		2441	ev_async_start (EV_P_ ev_async *w)
		2442	{
		2443	if (expect_false (ev_is_active (w)))
		2444	return;
		2445
		2446	evpipe_init (EV_A);
		2447
		2448	ev_start (EV_A_ (W)w, ++asynccnt);
		2449	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2450	asyncs [asynccnt - 1] = w;
		2451	}
		2452
		2453	void
		2454	ev_async_stop (EV_P_ ev_async *w)
		2455	{
		2456	clear_pending (EV_A_ (W)w);
		2457	if (expect_false (!ev_is_active (w)))
		2458	return;
		2459
		2460	{
		2461	int active = ((W)w)->active;
		2462	asyncs [active - 1] = asyncs [--asynccnt];
		2463	((W)asyncs [active - 1])->active = active;
		2464	}
		2465
		2466	ev_stop (EV_A_ (W)w);
		2467	}
		2468
		2469	void
		2470	ev_async_send (EV_P_ ev_async *w)
		2471	{
		2472	w->sent = 1;
		2473	evpipe_write (EV_A_ 0, 1);
		2474	}
		2475	#endif
1159		2476
1160	/*****************************************************************************/	2477	/*****************************************************************************/
1161		2478
1162	struct ev_once	2479	struct ev_once
1163	{	2480	{
1164	struct ev_io io;	2481	ev_io io;
1165	struct ev_timer to;	2482	ev_timer to;
1166	void (*cb)(int revents, void *arg);	2483	void (*cb)(int revents, void *arg);
1167	void *arg;	2484	void *arg;
1168	};	2485	};
1169		2486
1170	static void	2487	static void
1171	once_cb (struct ev_once *once, int revents)	2488	once_cb (EV_P_ struct ev_once *once, int revents)
1172	{	2489	{
1173	void (*cb)(int revents, void *arg) = once->cb;	2490	void (*cb)(int revents, void *arg) = once->cb;
1174	void *arg = once->arg;	2491	void *arg = once->arg;
1175		2492
1176	ev_io_stop (&once->io);	2493	ev_io_stop (EV_A_ &once->io);
1177	ev_timer_stop (&once->to);	2494	ev_timer_stop (EV_A_ &once->to);
1178	free (once);	2495	ev_free (once);
1179		2496
1180	cb (revents, arg);	2497	cb (revents, arg);
1181	}	2498	}
1182		2499
1183	static void	2500	static void
1184	once_cb_io (struct ev_io *w, int revents)	2501	once_cb_io (EV_P_ ev_io *w, int revents)
1185	{	2502	{
1186	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2503	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1187	}	2504	}
1188		2505
1189	static void	2506	static void
1190	once_cb_to (struct ev_timer *w, int revents)	2507	once_cb_to (EV_P_ ev_timer *w, int revents)
1191	{	2508	{
1192	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2509	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1193	}	2510	}
1194		2511
1195	void	2512	void
1196	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2513	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1197	{	2514	{
1198	struct ev_once *once = malloc (sizeof (struct ev_once));	2515	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1199		2516
1200	if (!once)	2517	if (expect_false (!once))
		2518	{
1201	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	2519	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1202	else	2520	return;
1203	{	2521	}
		2522
1204	once->cb = cb;	2523	once->cb = cb;
1205	once->arg = arg;	2524	once->arg = arg;
1206		2525
1207	ev_watcher_init (&once->io, once_cb_io);	2526	ev_init (&once->io, once_cb_io);
1208	if (fd >= 0)	2527	if (fd >= 0)
1209	{	2528	{
1210	ev_io_set (&once->io, fd, events);	2529	ev_io_set (&once->io, fd, events);
1211	ev_io_start (&once->io);	2530	ev_io_start (EV_A_ &once->io);
1212	}	2531	}
1213		2532
1214	ev_watcher_init (&once->to, once_cb_to);	2533	ev_init (&once->to, once_cb_to);
1215	if (timeout >= 0.)	2534	if (timeout >= 0.)
1216	{	2535	{
1217	ev_timer_set (&once->to, timeout, 0.);	2536	ev_timer_set (&once->to, timeout, 0.);
1218	ev_timer_start (&once->to);	2537	ev_timer_start (EV_A_ &once->to);
1219	}
1220	}
1221	}
1222
1223	/*****************************************************************************/
1224
1225	#if 0
1226
1227	struct ev_io wio;
1228
1229	static void
1230	sin_cb (struct ev_io *w, int revents)
1231	{
1232	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1233	}
1234
1235	static void
1236	ocb (struct ev_timer *w, int revents)
1237	{
1238	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1239	ev_timer_stop (w);
1240	ev_timer_start (w);
1241	}
1242
1243	static void
1244	scb (struct ev_signal *w, int revents)
1245	{
1246	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1247	ev_io_stop (&wio);
1248	ev_io_start (&wio);
1249	}
1250
1251	static void
1252	gcb (struct ev_signal *w, int revents)
1253	{
1254	fprintf (stderr, "generic %x\n", revents);
1255
1256	}
1257
1258	int main (void)
1259	{
1260	ev_init (0);
1261
1262	ev_io_init (&wio, sin_cb, 0, EV_READ);
1263	ev_io_start (&wio);
1264
1265	struct ev_timer t[10000];
1266
1267	#if 0
1268	int i;
1269	for (i = 0; i < 10000; ++i)
1270	{	2538	}
1271	struct ev_timer *w = t + i;
1272	ev_watcher_init (w, ocb, i);
1273	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1274	ev_timer_start (w);
1275	if (drand48 () < 0.5)
1276	ev_timer_stop (w);
1277	}
1278	#endif
1279
1280	struct ev_timer t1;
1281	ev_timer_init (&t1, ocb, 5, 10);
1282	ev_timer_start (&t1);
1283
1284	struct ev_signal sig;
1285	ev_signal_init (&sig, scb, SIGQUIT);
1286	ev_signal_start (&sig);
1287
1288	struct ev_check cw;
1289	ev_check_init (&cw, gcb);
1290	ev_check_start (&cw);
1291
1292	struct ev_idle iw;
1293	ev_idle_init (&iw, gcb);
1294	ev_idle_start (&iw);
1295
1296	ev_loop (0);
1297
1298	return 0;
1299	}	2539	}
1300		2540
		2541	#if EV_MULTIPLICITY
		2542	#include "ev_wrap.h"
1301	#endif	2543	#endif
1302		2544
		2545	#ifdef __cplusplus
		2546	}
		2547	#endif
1303		2548
1304
1305

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