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Comparing libev/ev.c (file contents):
Revision 1.6 by root, Tue Oct 30 23:55:29 2007 UTC vs.
Revision 1.208 by root, Fri Feb 1 13:22:48 2008 UTC

		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without modifica-
		8	* tion, are permitted provided that the following conditions are 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.
		27	*
		28	* Alternatively, the contents of this file may be used under the terms of
		29	* the GNU General Public License ("GPL") version 2 or any later version,
		30	* in which case the provisions of the GPL are applicable instead of
		31	* the above. If you wish to allow the use of your version of this file
		32	* only under the terms of the GPL and not to allow others to use your
		33	* version of this file under the BSD license, indicate your decision
		34	* by deleting the provisions above and replace them with the notice
		35	* and other provisions required by the GPL. If you do not delete the
		36	* provisions above, a recipient may use your version of this file under
		37	* either the BSD or the GPL.
		38	*/
		39
		40	#ifdef __cplusplus
		41	extern "C" {
		42	#endif
		43
		44	#ifndef EV_STANDALONE
		45	# ifdef EV_CONFIG_H
		46	# include EV_CONFIG_H
		47	# else
		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
		123	#endif
		124
1	#include <math.h>	125	#include <math.h>
2	#include <stdlib.h>	126	#include <stdlib.h>
		127	#include <fcntl.h>
		128	#include <stddef.h>
3		129
4	#include <stdio.h>	130	#include <stdio.h>
5		131
6	#include <assert.h>	132	#include <assert.h>
7	#include <errno.h>	133	#include <errno.h>
8	#include <sys/time.h>	134	#include <sys/types.h>
9	#include <time.h>	135	#include <time.h>
10		136
		137	#include <signal.h>
		138
		139	#ifdef EV_H
		140	# include EV_H
		141	#else
		142	# include "ev.h"
		143	#endif
		144
		145	#ifndef _WIN32
		146	# include <sys/time.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
		154	# endif
		155	#endif
		156
		157	/**/
		158
		159	#ifndef EV_USE_MONOTONIC
		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
		169	#endif
		170
		171	#ifndef EV_USE_SELECT
		172	# define EV_USE_SELECT 1
		173	#endif
		174
		175	#ifndef EV_USE_POLL
		176	# ifdef _WIN32
		177	# define EV_USE_POLL 0
		178	# else
		179	# define EV_USE_POLL 1
		180	# endif
		181	#endif
		182
		183	#ifndef EV_USE_EPOLL
		184	# define EV_USE_EPOLL 0
		185	#endif
		186
		187	#ifndef EV_USE_KQUEUE
		188	# define EV_USE_KQUEUE 0
		189	#endif
		190
		191	#ifndef EV_USE_PORT
		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
		213	#endif
		214
		215	/**/
		216
11	#ifdef CLOCK_MONOTONIC	217	#ifndef CLOCK_MONOTONIC
		218	# undef EV_USE_MONOTONIC
12	# define HAVE_MONOTONIC 1	219	# define EV_USE_MONOTONIC 0
		220	#endif
		221
		222	#ifndef CLOCK_REALTIME
		223	# undef EV_USE_REALTIME
		224	# define EV_USE_REALTIME 0
		225	#endif
		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>
13	#endif	235	# endif
		236	#endif
14		237
15	#define HAVE_REALTIME 1	238	#if EV_USE_INOTIFY
16	#define HAVE_EPOLL 1	239	# include <sys/inotify.h>
17	#define HAVE_SELECT 1	240	#endif
		241
		242	#if EV_SELECT_IS_WINSOCKET
		243	# include <winsock.h>
		244	#endif
		245
		246	/**/
		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 */
18		257
19	#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) */
20	#define MAX_BLOCKTIME 60.	259	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		260	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
21		261
		262	#if __GNUC__ >= 4
		263	# define expect(expr,value) __builtin_expect ((expr),(value))
		264	# define noinline __attribute__ ((noinline))
		265	#else
		266	# define expect(expr,value) (expr)
		267	# define noinline
		268	# if __STDC_VERSION__ < 199901L
		269	# define inline
		270	# endif
		271	#endif
		272
		273	#define expect_false(expr) expect ((expr) != 0, 0)
		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
		282
		283	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		284	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		285
		286	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		287	#define EMPTY2(a,b) /* used to suppress some warnings */
		288
		289	typedef ev_watcher *W;
		290	typedef ev_watcher_list *WL;
		291	typedef ev_watcher_time *WT;
		292
		293	#if EV_USE_MONOTONIC
		294	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		295	/* giving it a reasonably high chance of working on typical architetcures */
		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	};
22	#include "ev.h"	388	#include "ev_wrap.h"
23		389
24	struct ev_watcher {	390	static struct ev_loop default_loop_struct;
25	EV_WATCHER (ev_watcher);	391	struct ev_loop *ev_default_loop_ptr;
26	};
27		392
28	struct ev_watcher_list {	393	#else
29	EV_WATCHER_LIST (ev_watcher_list);
30	};
31		394
32	static ev_tstamp now, diff; /* monotonic clock */
33	ev_tstamp ev_now;	395	ev_tstamp ev_rt_now;
34	int ev_method;	396	#define VAR(name,decl) static decl;
		397	#include "ev_vars.h"
		398	#undef VAR
35		399
36	static int have_monotonic; /* runtime */	400	static int ev_default_loop_ptr;
37		401
38	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	402	#endif
39	static void (*method_modify)(int fd, int oev, int nev);	403
40	static void (*method_poll)(ev_tstamp timeout);	404	/*****************************************************************************/
41		405
42	ev_tstamp	406	ev_tstamp
43	ev_time (void)	407	ev_time (void)
44	{	408	{
45	#if HAVE_REALTIME	409	#if EV_USE_REALTIME
46	struct timespec ts;	410	struct timespec ts;
47	clock_gettime (CLOCK_REALTIME, &ts);	411	clock_gettime (CLOCK_REALTIME, &ts);
48	return ts.tv_sec + ts.tv_nsec * 1e-9;	412	return ts.tv_sec + ts.tv_nsec * 1e-9;
49	#else	413	#else
50	struct timeval tv;	414	struct timeval tv;
51	gettimeofday (&tv, 0);	415	gettimeofday (&tv, 0);
52	return tv.tv_sec + tv.tv_usec * 1e-6;	416	return tv.tv_sec + tv.tv_usec * 1e-6;
53	#endif	417	#endif
54	}	418	}
55		419
56	static ev_tstamp	420	ev_tstamp inline_size
57	get_clock (void)	421	get_clock (void)
58	{	422	{
59	#if HAVE_MONOTONIC	423	#if EV_USE_MONOTONIC
60	if (have_monotonic)	424	if (expect_true (have_monotonic))
61	{	425	{
62	struct timespec ts;	426	struct timespec ts;
63	clock_gettime (CLOCK_MONOTONIC, &ts);	427	clock_gettime (CLOCK_MONOTONIC, &ts);
64	return ts.tv_sec + ts.tv_nsec * 1e-9;	428	return ts.tv_sec + ts.tv_nsec * 1e-9;
65	}	429	}
66	#endif	430	#endif
67		431
68	return ev_time ();	432	return ev_time ();
69	}	433	}
70		434
		435	#if EV_MULTIPLICITY
		436	ev_tstamp
		437	ev_now (EV_P)
		438	{
		439	return ev_rt_now;
		440	}
		441	#endif
		442
		443	void
		444	ev_sleep (ev_tstamp delay)
		445	{
		446	if (delay > 0.)
		447	{
		448	#if EV_USE_NANOSLEEP
		449	struct timespec ts;
		450
		451	ts.tv_sec = (time_t)delay;
		452	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		453
		454	nanosleep (&ts, 0);
		455	#elif defined(_WIN32)
		456	Sleep (delay * 1e3);
		457	#else
		458	struct timeval tv;
		459
		460	tv.tv_sec = (time_t)delay;
		461	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		462
		463	select (0, 0, 0, 0, &tv);
		464	#endif
		465	}
		466	}
		467
		468	/*****************************************************************************/
		469
		470	int inline_size
		471	array_nextsize (int elem, int cur, int cnt)
		472	{
		473	int ncur = cur + 1;
		474
		475	do
		476	ncur <<= 1;
		477	while (cnt > ncur);
		478
		479	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		480	if (elem * ncur > 4096)
		481	{
		482	ncur *= elem;
		483	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		484	ncur = ncur - sizeof (void *) * 4;
		485	ncur /= elem;
		486	}
		487
		488	return ncur;
		489	}
		490
		491	static noinline void *
		492	array_realloc (int elem, void *base, int *cur, int cnt)
		493	{
		494	*cur = array_nextsize (elem, *cur, cnt);
		495	return ev_realloc (base, elem * *cur);
		496	}
		497
71	#define array_needsize(base,cur,cnt,init) \	498	#define array_needsize(type,base,cur,cnt,init) \
72	if ((cnt) > cur) \	499	if (expect_false ((cnt) > (cur))) \
73	{ \	500	{ \
74	int newcnt = cur ? cur << 1 : 16; \	501	int ocur_ = (cur); \
75	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	502	(base) = (type *)array_realloc \
76	base = realloc (base, sizeof (*base) * (newcnt)); \	503	(sizeof (type), (base), &(cur), (cnt)); \
77	init (base + cur, newcnt - cur); \	504	init ((base) + (ocur_), (cur) - ocur_); \
78	cur = newcnt; \	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
79	}	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	}
80		538
81	typedef struct	539	void inline_speed
		540	queue_events (EV_P_ W *events, int eventcnt, int type)
82	{	541	{
83	struct ev_io *head;	542	int i;
84	unsigned char wev, rev; /* want, received event set */
85	} ANFD;
86		543
87	static ANFD *anfds;	544	for (i = 0; i < eventcnt; ++i)
88	static int anfdmax;	545	ev_feed_event (EV_A_ events [i], type);
		546	}
89		547
90	static int *fdchanges;	548	/*****************************************************************************/
91	static int fdchangemax, fdchangecnt;
92		549
93	static void	550	void inline_size
94	anfds_init (ANFD *base, int count)	551	anfds_init (ANFD *base, int count)
95	{	552	{
96	while (count--)	553	while (count--)
97	{	554	{
98	base->head = 0;	555	base->head = 0;
99	base->wev = base->rev = EV_NONE;	556	base->events = EV_NONE;
		557	base->reify = 0;
		558
100	++base;	559	++base;
101	}	560	}
102	}	561	}
103		562
104	typedef struct	563	void inline_speed
105	{
106	struct ev_watcher *w;
107	int events;
108	} ANPENDING;
109
110	static ANPENDING *pendings;
111	static int pendingmax, pendingcnt;
112
113	static void
114	event (struct ev_watcher *w, int events)
115	{
116	w->pending = ++pendingcnt;
117	array_needsize (pendings, pendingmax, pendingcnt, );
118	pendings [pendingcnt - 1].w = w;
119	pendings [pendingcnt - 1].events = events;
120	}
121
122	static void
123	fd_event (int fd, int events)	564	fd_event (EV_P_ int fd, int revents)
124	{	565	{
125	ANFD *anfd = anfds + fd;	566	ANFD *anfd = anfds + fd;
126	struct ev_io *w;	567	ev_io *w;
127		568
128	for (w = anfd->head; w; w = w->next)	569	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
129	{	570	{
130	int ev = w->events & events;	571	int ev = w->events & revents;
131		572
132	if (ev)	573	if (ev)
133	event ((struct ev_watcher *)w, ev);	574	ev_feed_event (EV_A_ (W)w, ev);
134	}
135	}
136
137	static struct ev_timer **atimers;
138	static int atimermax, atimercnt;
139
140	static struct ev_timer **rtimers;
141	static int rtimermax, rtimercnt;
142
143	static void
144	upheap (struct ev_timer **timers, int k)
145	{
146	struct ev_timer *w = timers [k];
147
148	while (k && timers [k >> 1]->at > w->at)
149	{	575	}
150	timers [k] = timers [k >> 1];
151	timers [k]->active = k + 1;
152	k >>= 1;
153	}
154
155	timers [k] = w;
156	timers [k]->active = k + 1;
157
158	}	576	}
159		577
160	static void	578	void
161	downheap (struct ev_timer **timers, int N, int k)	579	ev_feed_fd_event (EV_P_ int fd, int revents)
162	{	580	{
163	struct ev_timer *w = timers [k];	581	if (fd >= 0 && fd < anfdmax)
164		582	fd_event (EV_A_ fd, revents);
165	while (k < (N >> 1))
166	{
167	int j = k << 1;
168
169	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
170	++j;
171
172	if (w->at <= timers [j]->at)
173	break;
174
175	timers [k] = timers [j];
176	timers [k]->active = k + 1;
177	k = j;
178	}
179
180	timers [k] = w;
181	timers [k]->active = k + 1;
182	}	583	}
183		584
184	static struct ev_signal **signals;	585	void inline_size
185	static int signalmax;	586	fd_reify (EV_P)
186
187	static void
188	signals_init (struct ev_signal **base, int count)
189	{
190	while (count--)
191	*base++ = 0;
192	}
193
194	#if HAVE_EPOLL
195	# include "ev_epoll.c"
196	#endif
197	#if HAVE_SELECT
198	# include "ev_select.c"
199	#endif
200
201	int ev_init (int flags)
202	{
203	#if HAVE_MONOTONIC
204	{
205	struct timespec ts;
206	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
207	have_monotonic = 1;
208	}
209	#endif
210
211	ev_now = ev_time ();
212	now = get_clock ();
213	diff = ev_now - now;
214
215	#if HAVE_EPOLL
216	if (epoll_init (flags))
217	return ev_method;
218	#endif
219	#if HAVE_SELECT
220	if (select_init (flags))
221	return ev_method;
222	#endif
223
224	ev_method = EVMETHOD_NONE;
225	return ev_method;
226	}
227
228	void ev_prefork (void)
229	{
230	}
231
232	void ev_postfork_parent (void)
233	{
234	}
235
236	void ev_postfork_child (void)
237	{
238	#if HAVE_EPOLL
239	if (ev_method == EVMETHOD_EPOLL)
240	epoll_postfork_child ();
241	#endif
242	}
243
244	static void
245	fd_reify (void)
246	{	587	{
247	int i;	588	int i;
248		589
249	for (i = 0; i < fdchangecnt; ++i)	590	for (i = 0; i < fdchangecnt; ++i)
250	{	591	{
251	int fd = fdchanges [i];	592	int fd = fdchanges [i];
252	ANFD *anfd = anfds + fd;	593	ANFD *anfd = anfds + fd;
253	struct ev_io *w;	594	ev_io *w;
254		595
255	int wev = 0;	596	unsigned char events = 0;
256		597
257	for (w = anfd->head; w; w = w->next)	598	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
258	wev |= w->events;	599	events |= (unsigned char)w->events;
259		600
260	if (anfd->wev != wev)	601	#if EV_SELECT_IS_WINSOCKET
		602	if (events)
261	{	603	{
262	method_modify (fd, anfd->wev, wev);	604	unsigned long argp;
263	anfd->wev = wev;	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));
264	}	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	}
265	}	624	}
266		625
267	fdchangecnt = 0;	626	fdchangecnt = 0;
268	}	627	}
269		628
		629	void inline_size
		630	fd_change (EV_P_ int fd, int flags)
		631	{
		632	unsigned char reify = anfds [fd].reify;
		633	anfds [fd].reify |= flags;
		634
		635	if (expect_true (!reify))
		636	{
		637	++fdchangecnt;
		638	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		639	fdchanges [fdchangecnt - 1] = fd;
		640	}
		641	}
		642
		643	void inline_speed
		644	fd_kill (EV_P_ int fd)
		645	{
		646	ev_io *w;
		647
		648	while ((w = (ev_io *)anfds [fd].head))
		649	{
		650	ev_io_stop (EV_A_ w);
		651	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		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
		663	}
		664
		665	/* called on EBADF to verify fds */
		666	static void noinline
		667	fd_ebadf (EV_P)
		668	{
		669	int fd;
		670
		671	for (fd = 0; fd < anfdmax; ++fd)
		672	if (anfds [fd].events)
		673	if (!fd_valid (fd) == -1 && errno == EBADF)
		674	fd_kill (EV_A_ fd);
		675	}
		676
		677	/* called on ENOMEM in select/poll to kill some fds and retry */
		678	static void noinline
		679	fd_enomem (EV_P)
		680	{
		681	int fd;
		682
		683	for (fd = anfdmax; fd--; )
		684	if (anfds [fd].events)
		685	{
		686	fd_kill (EV_A_ fd);
		687	return;
		688	}
		689	}
		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
		705	/*****************************************************************************/
		706
		707	void inline_speed
		708	upheap (WT *heap, int k)
		709	{
		710	WT w = heap [k];
		711
		712	while (k)
		713	{
		714	int p = (k - 1) >> 1;
		715
		716	if (heap [p]->at <= w->at)
		717	break;
		718
		719	heap [k] = heap [p];
		720	((W)heap [k])->active = k + 1;
		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 (;;)
		734	{
		735	int c = (k << 1) + 1;
		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
		752	heap [k] = w;
		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);
		761	}
		762
		763	/*****************************************************************************/
		764
		765	typedef struct
		766	{
		767	WL head;
		768	EV_ATOMIC_T gotsig;
		769	} ANSIG;
		770
		771	static ANSIG *signals;
		772	static int signalmax;
		773
		774	static EV_ATOMIC_T gotsig;
		775
		776	void inline_size
		777	signals_init (ANSIG *base, int count)
		778	{
		779	while (count--)
		780	{
		781	base->head = 0;
		782	base->gotsig = 0;
		783
		784	++base;
		785	}
		786	}
		787
		788	/*****************************************************************************/
		789
		790	void inline_speed
		791	fd_intern (int fd)
		792	{
		793	#ifdef _WIN32
		794	int arg = 1;
		795	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		796	#else
		797	fcntl (fd, F_SETFD, FD_CLOEXEC);
		798	fcntl (fd, F_SETFL, O_NONBLOCK);
		799	#endif
		800	}
		801
		802	static void noinline
		803	evpipe_init (EV_P)
		804	{
		805	if (!ev_is_active (&pipeev))
		806	{
		807	while (pipe (evpipe))
		808	syserr ("(libev) error creating signal/async pipe");
		809
		810	fd_intern (evpipe [0]);
		811	fd_intern (evpipe [1]);
		812
		813	ev_io_set (&pipeev, evpipe [0], EV_READ);
		814	ev_io_start (EV_A_ &pipeev);
		815	ev_unref (EV_A); /* child watcher should not keep loop alive */
		816	}
		817	}
		818
		819	void inline_size
		820	evpipe_write (EV_P_ int sig, int async)
		821	{
		822	if (!(gotasync || gotsig))
		823	{
		824	int old_errno = errno;
		825
		826	if (sig) gotsig = 1;
		827	if (async) gotasync = 1;
		828
		829	write (evpipe [1], &old_errno, 1);
		830	errno = old_errno;
		831	}
		832	}
		833
270	static void	834	static void
271	call_pending ()	835	pipecb (EV_P_ ev_io *iow, int revents)
		836	{
		837	{
		838	int dummy;
		839	read (evpipe [0], &dummy, 1);
		840	}
		841
		842	if (gotsig)
		843	{
		844	int signum;
		845	gotsig = 0;
		846
		847	for (signum = signalmax; signum--; )
		848	if (signals [signum].gotsig)
		849	ev_feed_signal_event (EV_A_ signum + 1);
		850	}
		851
		852	if (gotasync)
		853	{
		854	int i;
		855	gotasync = 0;
		856
		857	for (i = asynccnt; i--; )
		858	if (asyncs [i]->sent)
		859	{
		860	asyncs [i]->sent = 0;
		861	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		862	}
		863	}
		864	}
		865
		866	/*****************************************************************************/
		867
		868	static void
		869	sighandler (int signum)
		870	{
		871	#if EV_MULTIPLICITY
		872	struct ev_loop *loop = &default_loop_struct;
		873	#endif
		874
		875	#if _WIN32
		876	signal (signum, sighandler);
		877	#endif
		878
		879	signals [signum - 1].gotsig = 1;
		880	evpipe_write (EV_A_ 1, 0);
		881	}
		882
		883	void noinline
		884	ev_feed_signal_event (EV_P_ int signum)
		885	{
		886	WL w;
		887
		888	#if EV_MULTIPLICITY
		889	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		890	#endif
		891
		892	--signum;
		893
		894	if (signum < 0 || signum >= signalmax)
		895	return;
		896
		897	signals [signum].gotsig = 0;
		898
		899	for (w = signals [signum].head; w; w = w->next)
		900	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		901	}
		902
		903	/*****************************************************************************/
		904
		905	static WL childs [EV_PID_HASHSIZE];
		906
		907	#ifndef _WIN32
		908
		909	static ev_signal childev;
		910
		911	#ifndef WIFCONTINUED
		912	# define WIFCONTINUED(status) 0
		913	#endif
		914
		915	void inline_speed
		916	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		917	{
		918	ev_child *w;
		919	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		920
		921	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		922	{
		923	if ((w->pid == pid || !w->pid)
		924	&& (!traced || (w->flags & 1)))
		925	{
		926	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
		927	w->rpid = pid;
		928	w->rstatus = status;
		929	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		930	}
		931	}
		932	}
		933
		934	#ifndef WCONTINUED
		935	# define WCONTINUED 0
		936	#endif
		937
		938	static void
		939	childcb (EV_P_ ev_signal *sw, int revents)
		940	{
		941	int pid, status;
		942
		943	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
		944	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		945	if (!WCONTINUED
		946	|| errno != EINVAL
		947	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		948	return;
		949
		950	/* make sure we are called again until all childs have been reaped */
		951	/* we need to do it this way so that the callback gets called before we continue */
		952	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		953
		954	child_reap (EV_A_ sw, pid, pid, status);
		955	if (EV_PID_HASHSIZE > 1)
		956	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		957	}
		958
		959	#endif
		960
		961	/*****************************************************************************/
		962
		963	#if EV_USE_PORT
		964	# include "ev_port.c"
		965	#endif
		966	#if EV_USE_KQUEUE
		967	# include "ev_kqueue.c"
		968	#endif
		969	#if EV_USE_EPOLL
		970	# include "ev_epoll.c"
		971	#endif
		972	#if EV_USE_POLL
		973	# include "ev_poll.c"
		974	#endif
		975	#if EV_USE_SELECT
		976	# include "ev_select.c"
		977	#endif
		978
		979	int
		980	ev_version_major (void)
		981	{
		982	return EV_VERSION_MAJOR;
		983	}
		984
		985	int
		986	ev_version_minor (void)
		987	{
		988	return EV_VERSION_MINOR;
		989	}
		990
		991	/* return true if we are running with elevated privileges and should ignore env variables */
		992	int inline_size
		993	enable_secure (void)
		994	{
		995	#ifdef _WIN32
		996	return 0;
		997	#else
		998	return getuid () != geteuid ()
		999	|| getgid () != getegid ();
		1000	#endif
		1001	}
		1002
		1003	unsigned int
		1004	ev_supported_backends (void)
		1005	{
		1006	unsigned int flags = 0;
		1007
		1008	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		1009	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1010	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1011	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1012	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1013
		1014	return flags;
		1015	}
		1016
		1017	unsigned int
		1018	ev_recommended_backends (void)
		1019	{
		1020	unsigned int flags = ev_supported_backends ();
		1021
		1022	#ifndef __NetBSD__
		1023	/* kqueue is borked on everything but netbsd apparently */
		1024	/* it usually doesn't work correctly on anything but sockets and pipes */
		1025	flags &= ~EVBACKEND_KQUEUE;
		1026	#endif
		1027	#ifdef __APPLE__
		1028	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1029	flags &= ~EVBACKEND_POLL;
		1030	#endif
		1031
		1032	return flags;
		1033	}
		1034
		1035	unsigned int
		1036	ev_embeddable_backends (void)
		1037	{
		1038	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1039
		1040	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1041	/* please fix it and tell me how to detect the fix */
		1042	flags &= ~EVBACKEND_EPOLL;
		1043
		1044	return flags;
		1045	}
		1046
		1047	unsigned int
		1048	ev_backend (EV_P)
		1049	{
		1050	return backend;
		1051	}
		1052
		1053	unsigned int
		1054	ev_loop_count (EV_P)
		1055	{
		1056	return loop_count;
		1057	}
		1058
		1059	void
		1060	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1061	{
		1062	io_blocktime = interval;
		1063	}
		1064
		1065	void
		1066	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1067	{
		1068	timeout_blocktime = interval;
		1069	}
		1070
		1071	static void noinline
		1072	loop_init (EV_P_ unsigned int flags)
		1073	{
		1074	if (!backend)
		1075	{
		1076	#if EV_USE_MONOTONIC
		1077	{
		1078	struct timespec ts;
		1079	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		1080	have_monotonic = 1;
		1081	}
		1082	#endif
		1083
		1084	ev_rt_now = ev_time ();
		1085	mn_now = get_clock ();
		1086	now_floor = mn_now;
		1087	rtmn_diff = ev_rt_now - mn_now;
		1088
		1089	io_blocktime = 0.;
		1090	timeout_blocktime = 0.;
		1091
		1092	/* pid check not overridable via env */
		1093	#ifndef _WIN32
		1094	if (flags & EVFLAG_FORKCHECK)
		1095	curpid = getpid ();
		1096	#endif
		1097
		1098	if (!(flags & EVFLAG_NOENV)
		1099	&& !enable_secure ()
		1100	&& getenv ("LIBEV_FLAGS"))
		1101	flags = atoi (getenv ("LIBEV_FLAGS"));
		1102
		1103	if (!(flags & 0x0000ffffUL))
		1104	flags |= ev_recommended_backends ();
		1105
		1106	backend = 0;
		1107	backend_fd = -1;
		1108	#if EV_USE_INOTIFY
		1109	fs_fd = -2;
		1110	#endif
		1111
		1112	#if EV_USE_PORT
		1113	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1114	#endif
		1115	#if EV_USE_KQUEUE
		1116	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1117	#endif
		1118	#if EV_USE_EPOLL
		1119	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1120	#endif
		1121	#if EV_USE_POLL
		1122	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1123	#endif
		1124	#if EV_USE_SELECT
		1125	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		1126	#endif
		1127
		1128	ev_init (&pipeev, pipecb);
		1129	ev_set_priority (&pipeev, EV_MAXPRI);
		1130	}
		1131	}
		1132
		1133	static void noinline
		1134	loop_destroy (EV_P)
272	{	1135	{
273	int i;	1136	int i;
274		1137
275	for (i = 0; i < pendingcnt; ++i)	1138	if (ev_is_active (&pipeev))
		1139	{
		1140	ev_ref (EV_A); /* signal watcher */
		1141	ev_io_stop (EV_A_ &pipeev);
		1142
		1143	close (evpipe [0]); evpipe [0] = 0;
		1144	close (evpipe [1]); evpipe [1] = 0;
276	{	1145	}
277	ANPENDING *p = pendings + i;
278		1146
279	if (p->w)	1147	#if EV_USE_INOTIFY
		1148	if (fs_fd >= 0)
		1149	close (fs_fd);
		1150	#endif
		1151
		1152	if (backend_fd >= 0)
		1153	close (backend_fd);
		1154
		1155	#if EV_USE_PORT
		1156	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1157	#endif
		1158	#if EV_USE_KQUEUE
		1159	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1160	#endif
		1161	#if EV_USE_EPOLL
		1162	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1163	#endif
		1164	#if EV_USE_POLL
		1165	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1166	#endif
		1167	#if EV_USE_SELECT
		1168	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1169	#endif
		1170
		1171	for (i = NUMPRI; i--; )
		1172	{
		1173	array_free (pending, [i]);
		1174	#if EV_IDLE_ENABLE
		1175	array_free (idle, [i]);
		1176	#endif
		1177	}
		1178
		1179	ev_free (anfds); anfdmax = 0;
		1180
		1181	/* have to use the microsoft-never-gets-it-right macro */
		1182	array_free (fdchange, EMPTY);
		1183	array_free (timer, EMPTY);
		1184	#if EV_PERIODIC_ENABLE
		1185	array_free (periodic, EMPTY);
		1186	#endif
		1187	#if EV_FORK_ENABLE
		1188	array_free (fork, EMPTY);
		1189	#endif
		1190	array_free (prepare, EMPTY);
		1191	array_free (check, EMPTY);
		1192
		1193	backend = 0;
		1194	}
		1195
		1196	void inline_size infy_fork (EV_P);
		1197
		1198	void inline_size
		1199	loop_fork (EV_P)
		1200	{
		1201	#if EV_USE_PORT
		1202	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1203	#endif
		1204	#if EV_USE_KQUEUE
		1205	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1206	#endif
		1207	#if EV_USE_EPOLL
		1208	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1209	#endif
		1210	#if EV_USE_INOTIFY
		1211	infy_fork (EV_A);
		1212	#endif
		1213
		1214	if (ev_is_active (&pipeev))
		1215	{
		1216	/* this "locks" the handlers against writing to the pipe */
		1217	gotsig = gotasync = 1;
		1218
		1219	ev_ref (EV_A);
		1220	ev_io_stop (EV_A_ &pipeev);
		1221	close (evpipe [0]);
		1222	close (evpipe [1]);
		1223
		1224	evpipe_init (EV_A);
		1225	/* now iterate over everything, in case we missed something */
		1226	pipecb (EV_A_ &pipeev, EV_READ);
		1227	}
		1228
		1229	postfork = 0;
		1230	}
		1231
		1232	#if EV_MULTIPLICITY
		1233	struct ev_loop *
		1234	ev_loop_new (unsigned int flags)
		1235	{
		1236	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1237
		1238	memset (loop, 0, sizeof (struct ev_loop));
		1239
		1240	loop_init (EV_A_ flags);
		1241
		1242	if (ev_backend (EV_A))
		1243	return loop;
		1244
		1245	return 0;
		1246	}
		1247
		1248	void
		1249	ev_loop_destroy (EV_P)
		1250	{
		1251	loop_destroy (EV_A);
		1252	ev_free (loop);
		1253	}
		1254
		1255	void
		1256	ev_loop_fork (EV_P)
		1257	{
		1258	postfork = 1; /* must be in line with ev_default_fork */
		1259	}
		1260
		1261	#endif
		1262
		1263	#if EV_MULTIPLICITY
		1264	struct ev_loop *
		1265	ev_default_loop_init (unsigned int flags)
		1266	#else
		1267	int
		1268	ev_default_loop (unsigned int flags)
		1269	#endif
		1270	{
		1271	if (!ev_default_loop_ptr)
		1272	{
		1273	#if EV_MULTIPLICITY
		1274	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1275	#else
		1276	ev_default_loop_ptr = 1;
		1277	#endif
		1278
		1279	loop_init (EV_A_ flags);
		1280
		1281	if (ev_backend (EV_A))
280	{	1282	{
281	p->w->pending = 0;	1283	#ifndef _WIN32
282	p->w->cb (p->w, p->events);	1284	ev_signal_init (&childev, childcb, SIGCHLD);
		1285	ev_set_priority (&childev, EV_MAXPRI);
		1286	ev_signal_start (EV_A_ &childev);
		1287	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1288	#endif
283	}	1289	}
		1290	else
		1291	ev_default_loop_ptr = 0;
		1292	}
		1293
		1294	return ev_default_loop_ptr;
		1295	}
		1296
		1297	void
		1298	ev_default_destroy (void)
		1299	{
		1300	#if EV_MULTIPLICITY
		1301	struct ev_loop *loop = ev_default_loop_ptr;
		1302	#endif
		1303
		1304	#ifndef _WIN32
		1305	ev_ref (EV_A); /* child watcher */
		1306	ev_signal_stop (EV_A_ &childev);
		1307	#endif
		1308
		1309	loop_destroy (EV_A);
		1310	}
		1311
		1312	void
		1313	ev_default_fork (void)
		1314	{
		1315	#if EV_MULTIPLICITY
		1316	struct ev_loop *loop = ev_default_loop_ptr;
		1317	#endif
		1318
		1319	if (backend)
		1320	postfork = 1; /* must be in line with ev_loop_fork */
		1321	}
		1322
		1323	/*****************************************************************************/
		1324
		1325	void
		1326	ev_invoke (EV_P_ void *w, int revents)
		1327	{
		1328	EV_CB_INVOKE ((W)w, revents);
		1329	}
		1330
		1331	void inline_speed
		1332	call_pending (EV_P)
		1333	{
		1334	int pri;
		1335
		1336	for (pri = NUMPRI; pri--; )
		1337	while (pendingcnt [pri])
		1338	{
		1339	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1340
		1341	if (expect_true (p->w))
		1342	{
		1343	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1344
		1345	p->w->pending = 0;
		1346	EV_CB_INVOKE (p->w, p->events);
		1347	}
284	}	1348	}
285
286	pendingcnt = 0;
287	}	1349	}
288		1350
289	static void	1351	void inline_size
290	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	1352	timers_reify (EV_P)
291	{	1353	{
292	while (timercnt && timers [0]->at <= now)	1354	while (timercnt && ((WT)timers [0])->at <= mn_now)
293	{	1355	{
294	struct ev_timer *w = timers [0];	1356	ev_timer *w = (ev_timer *)timers [0];
		1357
		1358	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
295		1359
296	/* first reschedule or stop timer */	1360	/* first reschedule or stop timer */
297	if (w->repeat)	1361	if (w->repeat)
298	{	1362	{
299	if (w->is_abs)	1363	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
300	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;	1364
301	else
302	w->at = now + w->repeat;	1365	((WT)w)->at += w->repeat;
303		1366	if (((WT)w)->at < mn_now)
304	assert (w->at > now);	1367	((WT)w)->at = mn_now;
305		1368
306	downheap (timers, timercnt, 0);	1369	downheap (timers, timercnt, 0);
307	}	1370	}
308	else	1371	else
		1372	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1373
		1374	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1375	}
		1376	}
		1377
		1378	#if EV_PERIODIC_ENABLE
		1379	void inline_size
		1380	periodics_reify (EV_P)
		1381	{
		1382	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
		1383	{
		1384	ev_periodic *w = (ev_periodic *)periodics [0];
		1385
		1386	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
		1387
		1388	/* first reschedule or stop timer */
		1389	if (w->reschedule_cb)
309	{	1390	{
310	evtimer_stop (w); /* nonrepeating: stop timer */	1391	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
311	--timercnt; /* maybe pass by reference instead? */	1392	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1393	downheap (periodics, periodiccnt, 0);
312	}	1394	}
		1395	else if (w->interval)
		1396	{
		1397	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1398	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
		1399	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1400	downheap (periodics, periodiccnt, 0);
		1401	}
		1402	else
		1403	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
313		1404
314	event ((struct ev_watcher *)w, EV_TIMEOUT);	1405	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
315	}	1406	}
316	}	1407	}
317		1408
318	static void	1409	static void noinline
319	time_update ()	1410	periodics_reschedule (EV_P)
320	{	1411	{
321	int i;	1412	int i;
322	ev_now = ev_time ();
323		1413
324	if (have_monotonic)	1414	/* adjust periodics after time jump */
		1415	for (i = 0; i < periodiccnt; ++i)
		1416	{
		1417	ev_periodic *w = (ev_periodic *)periodics [i];
		1418
		1419	if (w->reschedule_cb)
		1420	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1421	else if (w->interval)
		1422	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
325	{	1423	}
326	ev_tstamp odiff = diff;
327		1424
328	/* detecting time jumps is much more difficult */	1425	/* now rebuild the heap */
329	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1426	for (i = periodiccnt >> 1; i--; )
		1427	downheap (periodics, periodiccnt, i);
		1428	}
		1429	#endif
		1430
		1431	#if EV_IDLE_ENABLE
		1432	void inline_size
		1433	idle_reify (EV_P)
		1434	{
		1435	if (expect_false (idleall))
		1436	{
		1437	int pri;
		1438
		1439	for (pri = NUMPRI; pri--; )
330	{	1440	{
		1441	if (pendingcnt [pri])
		1442	break;
		1443
		1444	if (idlecnt [pri])
		1445	{
		1446	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1447	break;
		1448	}
		1449	}
		1450	}
		1451	}
		1452	#endif
		1453
		1454	void inline_speed
		1455	time_update (EV_P_ ev_tstamp max_block)
		1456	{
		1457	int i;
		1458
		1459	#if EV_USE_MONOTONIC
		1460	if (expect_true (have_monotonic))
		1461	{
		1462	ev_tstamp odiff = rtmn_diff;
		1463
331	now = get_clock ();	1464	mn_now = get_clock ();
		1465
		1466	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1467	/* interpolate in the meantime */
		1468	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1469	{
		1470	ev_rt_now = rtmn_diff + mn_now;
		1471	return;
		1472	}
		1473
		1474	now_floor = mn_now;
		1475	ev_rt_now = ev_time ();
		1476
		1477	/* loop a few times, before making important decisions.
		1478	* on the choice of "4": one iteration isn't enough,
		1479	* in case we get preempted during the calls to
		1480	* ev_time and get_clock. a second call is almost guaranteed
		1481	* to succeed in that case, though. and looping a few more times
		1482	* doesn't hurt either as we only do this on time-jumps or
		1483	* in the unlikely event of having been preempted here.
		1484	*/
		1485	for (i = 4; --i; )
		1486	{
332	diff = ev_now - now;	1487	rtmn_diff = ev_rt_now - mn_now;
333		1488
334	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1489	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
335	return; /* all is well */	1490	return; /* all is well */
336		1491
337	ev_now = ev_time ();	1492	ev_rt_now = ev_time ();
		1493	mn_now = get_clock ();
		1494	now_floor = mn_now;
338	}	1495	}
339		1496
340	/* time jump detected, reschedule atimers */	1497	# if EV_PERIODIC_ENABLE
341	for (i = 0; i < atimercnt; ++i)	1498	periodics_reschedule (EV_A);
		1499	# endif
		1500	/* no timer adjustment, as the monotonic clock doesn't jump */
		1501	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1502	}
		1503	else
		1504	#endif
		1505	{
		1506	ev_rt_now = ev_time ();
		1507
		1508	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
342	{	1509	{
343	struct ev_timer *w = atimers [i];	1510	#if EV_PERIODIC_ENABLE
344	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1511	periodics_reschedule (EV_A);
		1512	#endif
		1513	/* adjust timers. this is easy, as the offset is the same for all of them */
		1514	for (i = 0; i < timercnt; ++i)
		1515	((WT)timers [i])->at += ev_rt_now - mn_now;
345	}	1516	}
346	}
347	else
348	{
349	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
350	/* time jump detected, adjust rtimers */
351	for (i = 0; i < rtimercnt; ++i)
352	rtimers [i]->at += ev_now - now;
353		1517
354	now = ev_now;	1518	mn_now = ev_rt_now;
355	}	1519	}
356	}	1520	}
357		1521
358	int ev_loop_done;	1522	void
		1523	ev_ref (EV_P)
		1524	{
		1525	++activecnt;
		1526	}
359		1527
		1528	void
		1529	ev_unref (EV_P)
		1530	{
		1531	--activecnt;
		1532	}
		1533
		1534	static int loop_done;
		1535
		1536	void
360	void ev_loop (int flags)	1537	ev_loop (EV_P_ int flags)
361	{	1538	{
362	double block;
363	ev_loop_done = flags & EVLOOP_ONESHOT;	1539	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1540	? EVUNLOOP_ONE
		1541	: EVUNLOOP_CANCEL;
		1542
		1543	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
364		1544
365	do	1545	do
366	{	1546	{
		1547	#ifndef _WIN32
		1548	if (expect_false (curpid)) /* penalise the forking check even more */
		1549	if (expect_false (getpid () != curpid))
		1550	{
		1551	curpid = getpid ();
		1552	postfork = 1;
		1553	}
		1554	#endif
		1555
		1556	#if EV_FORK_ENABLE
		1557	/* we might have forked, so queue fork handlers */
		1558	if (expect_false (postfork))
		1559	if (forkcnt)
		1560	{
		1561	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1562	call_pending (EV_A);
		1563	}
		1564	#endif
		1565
		1566	/* queue prepare watchers (and execute them) */
		1567	if (expect_false (preparecnt))
		1568	{
		1569	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1570	call_pending (EV_A);
		1571	}
		1572
		1573	if (expect_false (!activecnt))
		1574	break;
		1575
		1576	/* we might have forked, so reify kernel state if necessary */
		1577	if (expect_false (postfork))
		1578	loop_fork (EV_A);
		1579
367	/* update fd-related kernel structures */	1580	/* update fd-related kernel structures */
368	fd_reify ();	1581	fd_reify (EV_A);
369		1582
370	/* calculate blocking time */	1583	/* calculate blocking time */
371	if (flags & EVLOOP_NONBLOCK)	1584	{
372	block = 0.;	1585	ev_tstamp waittime = 0.;
373	else	1586	ev_tstamp sleeptime = 0.;
		1587
		1588	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
374	{	1589	{
		1590	/* update time to cancel out callback processing overhead */
		1591	time_update (EV_A_ 1e100);
		1592
375	block = MAX_BLOCKTIME;	1593	waittime = MAX_BLOCKTIME;
376		1594
377	if (rtimercnt)	1595	if (timercnt)
378	{	1596	{
379	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1597	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
380	if (block > to) block = to;	1598	if (waittime > to) waittime = to;
381	}	1599	}
382		1600
		1601	#if EV_PERIODIC_ENABLE
383	if (atimercnt)	1602	if (periodiccnt)
384	{	1603	{
385	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1604	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
386	if (block > to) block = to;	1605	if (waittime > to) waittime = to;
387	}	1606	}
		1607	#endif
388		1608
389	if (block < 0.) block = 0.;	1609	if (expect_false (waittime < timeout_blocktime))
		1610	waittime = timeout_blocktime;
		1611
		1612	sleeptime = waittime - backend_fudge;
		1613
		1614	if (expect_true (sleeptime > io_blocktime))
		1615	sleeptime = io_blocktime;
		1616
		1617	if (sleeptime)
		1618	{
		1619	ev_sleep (sleeptime);
		1620	waittime -= sleeptime;
		1621	}
390	}	1622	}
391		1623
392	method_poll (block);	1624	++loop_count;
		1625	backend_poll (EV_A_ waittime);
393		1626
394	/* update ev_now, do magic */	1627	/* update ev_rt_now, do magic */
395	time_update ();	1628	time_update (EV_A_ waittime + sleeptime);
		1629	}
396		1630
397	/* put pending timers into pendign queue and reschedule them */	1631	/* queue pending timers and reschedule them */
398	/* absolute timers first */	1632	timers_reify (EV_A); /* relative timers called last */
399	timers_reify (atimers, atimercnt, ev_now);	1633	#if EV_PERIODIC_ENABLE
400	/* relative timers second */	1634	periodics_reify (EV_A); /* absolute timers called first */
401	timers_reify (rtimers, rtimercnt, now);	1635	#endif
402		1636
		1637	#if EV_IDLE_ENABLE
		1638	/* queue idle watchers unless other events are pending */
		1639	idle_reify (EV_A);
		1640	#endif
		1641
		1642	/* queue check watchers, to be executed first */
		1643	if (expect_false (checkcnt))
		1644	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1645
403	call_pending ();	1646	call_pending (EV_A);
404	}
405	while (!ev_loop_done);
406	}
407		1647
408	static void	1648	}
409	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1649	while (expect_true (activecnt && !loop_done));
		1650
		1651	if (loop_done == EVUNLOOP_ONE)
		1652	loop_done = EVUNLOOP_CANCEL;
		1653	}
		1654
		1655	void
		1656	ev_unloop (EV_P_ int how)
		1657	{
		1658	loop_done = how;
		1659	}
		1660
		1661	/*****************************************************************************/
		1662
		1663	void inline_size
		1664	wlist_add (WL *head, WL elem)
410	{	1665	{
411	elem->next = *head;	1666	elem->next = *head;
412	*head = elem;	1667	*head = elem;
413	}	1668	}
414		1669
415	static void	1670	void inline_size
416	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1671	wlist_del (WL *head, WL elem)
417	{	1672	{
418	while (*head)	1673	while (*head)
419	{	1674	{
420	if (*head == elem)	1675	if (*head == elem)
421	{	1676	{
…		…
425		1680
426	head = &(*head)->next;	1681	head = &(*head)->next;
427	}	1682	}
428	}	1683	}
429		1684
		1685	void inline_speed
		1686	clear_pending (EV_P_ W w)
		1687	{
		1688	if (w->pending)
		1689	{
		1690	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1691	w->pending = 0;
		1692	}
		1693	}
		1694
		1695	int
		1696	ev_clear_pending (EV_P_ void *w)
		1697	{
		1698	W w_ = (W)w;
		1699	int pending = w_->pending;
		1700
		1701	if (expect_true (pending))
		1702	{
		1703	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1704	w_->pending = 0;
		1705	p->w = 0;
		1706	return p->events;
		1707	}
		1708	else
		1709	return 0;
		1710	}
		1711
		1712	void inline_size
		1713	pri_adjust (EV_P_ W w)
		1714	{
		1715	int pri = w->priority;
		1716	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1717	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1718	w->priority = pri;
		1719	}
		1720
		1721	void inline_speed
		1722	ev_start (EV_P_ W w, int active)
		1723	{
		1724	pri_adjust (EV_A_ w);
		1725	w->active = active;
		1726	ev_ref (EV_A);
		1727	}
		1728
		1729	void inline_size
		1730	ev_stop (EV_P_ W w)
		1731	{
		1732	ev_unref (EV_A);
		1733	w->active = 0;
		1734	}
		1735
		1736	/*****************************************************************************/
		1737
		1738	void noinline
		1739	ev_io_start (EV_P_ ev_io *w)
		1740	{
		1741	int fd = w->fd;
		1742
		1743	if (expect_false (ev_is_active (w)))
		1744	return;
		1745
		1746	assert (("ev_io_start called with negative fd", fd >= 0));
		1747
		1748	ev_start (EV_A_ (W)w, 1);
		1749	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1750	wlist_add (&anfds[fd].head, (WL)w);
		1751
		1752	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1753	w->events &= ~EV_IOFDSET;
		1754	}
		1755
		1756	void noinline
		1757	ev_io_stop (EV_P_ ev_io *w)
		1758	{
		1759	clear_pending (EV_A_ (W)w);
		1760	if (expect_false (!ev_is_active (w)))
		1761	return;
		1762
		1763	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1764
		1765	wlist_del (&anfds[w->fd].head, (WL)w);
		1766	ev_stop (EV_A_ (W)w);
		1767
		1768	fd_change (EV_A_ w->fd, 1);
		1769	}
		1770
		1771	void noinline
		1772	ev_timer_start (EV_P_ ev_timer *w)
		1773	{
		1774	if (expect_false (ev_is_active (w)))
		1775	return;
		1776
		1777	((WT)w)->at += mn_now;
		1778
		1779	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1780
		1781	ev_start (EV_A_ (W)w, ++timercnt);
		1782	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
		1783	timers [timercnt - 1] = (WT)w;
		1784	upheap (timers, timercnt - 1);
		1785
		1786	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1787	}
		1788
		1789	void noinline
		1790	ev_timer_stop (EV_P_ ev_timer *w)
		1791	{
		1792	clear_pending (EV_A_ (W)w);
		1793	if (expect_false (!ev_is_active (w)))
		1794	return;
		1795
		1796	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1797
		1798	{
		1799	int active = ((W)w)->active;
		1800
		1801	if (expect_true (--active < --timercnt))
		1802	{
		1803	timers [active] = timers [timercnt];
		1804	adjustheap (timers, timercnt, active);
		1805	}
		1806	}
		1807
		1808	((WT)w)->at -= mn_now;
		1809
		1810	ev_stop (EV_A_ (W)w);
		1811	}
		1812
		1813	void noinline
		1814	ev_timer_again (EV_P_ ev_timer *w)
		1815	{
		1816	if (ev_is_active (w))
		1817	{
		1818	if (w->repeat)
		1819	{
		1820	((WT)w)->at = mn_now + w->repeat;
		1821	adjustheap (timers, timercnt, ((W)w)->active - 1);
		1822	}
		1823	else
		1824	ev_timer_stop (EV_A_ w);
		1825	}
		1826	else if (w->repeat)
		1827	{
		1828	w->at = w->repeat;
		1829	ev_timer_start (EV_A_ w);
		1830	}
		1831	}
		1832
		1833	#if EV_PERIODIC_ENABLE
		1834	void noinline
		1835	ev_periodic_start (EV_P_ ev_periodic *w)
		1836	{
		1837	if (expect_false (ev_is_active (w)))
		1838	return;
		1839
		1840	if (w->reschedule_cb)
		1841	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1842	else if (w->interval)
		1843	{
		1844	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1845	/* this formula differs from the one in periodic_reify because we do not always round up */
		1846	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1847	}
		1848	else
		1849	((WT)w)->at = w->offset;
		1850
		1851	ev_start (EV_A_ (W)w, ++periodiccnt);
		1852	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
		1853	periodics [periodiccnt - 1] = (WT)w;
		1854	upheap (periodics, periodiccnt - 1);
		1855
		1856	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1857	}
		1858
		1859	void noinline
		1860	ev_periodic_stop (EV_P_ ev_periodic *w)
		1861	{
		1862	clear_pending (EV_A_ (W)w);
		1863	if (expect_false (!ev_is_active (w)))
		1864	return;
		1865
		1866	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1867
		1868	{
		1869	int active = ((W)w)->active;
		1870
		1871	if (expect_true (--active < --periodiccnt))
		1872	{
		1873	periodics [active] = periodics [periodiccnt];
		1874	adjustheap (periodics, periodiccnt, active);
		1875	}
		1876	}
		1877
		1878	ev_stop (EV_A_ (W)w);
		1879	}
		1880
		1881	void noinline
		1882	ev_periodic_again (EV_P_ ev_periodic *w)
		1883	{
		1884	/* TODO: use adjustheap and recalculation */
		1885	ev_periodic_stop (EV_A_ w);
		1886	ev_periodic_start (EV_A_ w);
		1887	}
		1888	#endif
		1889
		1890	#ifndef SA_RESTART
		1891	# define SA_RESTART 0
		1892	#endif
		1893
		1894	void noinline
		1895	ev_signal_start (EV_P_ ev_signal *w)
		1896	{
		1897	#if EV_MULTIPLICITY
		1898	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1899	#endif
		1900	if (expect_false (ev_is_active (w)))
		1901	return;
		1902
		1903	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1904
		1905	evpipe_init (EV_A);
		1906
		1907	{
		1908	#ifndef _WIN32
		1909	sigset_t full, prev;
		1910	sigfillset (&full);
		1911	sigprocmask (SIG_SETMASK, &full, &prev);
		1912	#endif
		1913
		1914	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1915
		1916	#ifndef _WIN32
		1917	sigprocmask (SIG_SETMASK, &prev, 0);
		1918	#endif
		1919	}
		1920
		1921	ev_start (EV_A_ (W)w, 1);
		1922	wlist_add (&signals [w->signum - 1].head, (WL)w);
		1923
		1924	if (!((WL)w)->next)
		1925	{
		1926	#if _WIN32
		1927	signal (w->signum, sighandler);
		1928	#else
		1929	struct sigaction sa;
		1930	sa.sa_handler = sighandler;
		1931	sigfillset (&sa.sa_mask);
		1932	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1933	sigaction (w->signum, &sa, 0);
		1934	#endif
		1935	}
		1936	}
		1937
		1938	void noinline
		1939	ev_signal_stop (EV_P_ ev_signal *w)
		1940	{
		1941	clear_pending (EV_A_ (W)w);
		1942	if (expect_false (!ev_is_active (w)))
		1943	return;
		1944
		1945	wlist_del (&signals [w->signum - 1].head, (WL)w);
		1946	ev_stop (EV_A_ (W)w);
		1947
		1948	if (!signals [w->signum - 1].head)
		1949	signal (w->signum, SIG_DFL);
		1950	}
		1951
		1952	void
		1953	ev_child_start (EV_P_ ev_child *w)
		1954	{
		1955	#if EV_MULTIPLICITY
		1956	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1957	#endif
		1958	if (expect_false (ev_is_active (w)))
		1959	return;
		1960
		1961	ev_start (EV_A_ (W)w, 1);
		1962	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1963	}
		1964
		1965	void
		1966	ev_child_stop (EV_P_ ev_child *w)
		1967	{
		1968	clear_pending (EV_A_ (W)w);
		1969	if (expect_false (!ev_is_active (w)))
		1970	return;
		1971
		1972	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1973	ev_stop (EV_A_ (W)w);
		1974	}
		1975
		1976	#if EV_STAT_ENABLE
		1977
		1978	# ifdef _WIN32
		1979	# undef lstat
		1980	# define lstat(a,b) _stati64 (a,b)
		1981	# endif
		1982
		1983	#define DEF_STAT_INTERVAL 5.0074891
		1984	#define MIN_STAT_INTERVAL 0.1074891
		1985
		1986	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1987
		1988	#if EV_USE_INOTIFY
		1989	# define EV_INOTIFY_BUFSIZE 8192
		1990
		1991	static void noinline
		1992	infy_add (EV_P_ ev_stat *w)
		1993	{
		1994	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
		1995
		1996	if (w->wd < 0)
		1997	{
		1998	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1999
		2000	/* monitor some parent directory for speedup hints */
		2001	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2002	{
		2003	char path [4096];
		2004	strcpy (path, w->path);
		2005
		2006	do
		2007	{
		2008	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2009	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2010
		2011	char *pend = strrchr (path, '/');
		2012
		2013	if (!pend)
		2014	break; /* whoops, no '/', complain to your admin */
		2015
		2016	*pend = 0;
		2017	w->wd = inotify_add_watch (fs_fd, path, mask);
		2018	}
		2019	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2020	}
		2021	}
		2022	else
		2023	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2024
		2025	if (w->wd >= 0)
		2026	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2027	}
		2028
		2029	static void noinline
		2030	infy_del (EV_P_ ev_stat *w)
		2031	{
		2032	int slot;
		2033	int wd = w->wd;
		2034
		2035	if (wd < 0)
		2036	return;
		2037
		2038	w->wd = -2;
		2039	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2040	wlist_del (&fs_hash [slot].head, (WL)w);
		2041
		2042	/* remove this watcher, if others are watching it, they will rearm */
		2043	inotify_rm_watch (fs_fd, wd);
		2044	}
		2045
		2046	static void noinline
		2047	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2048	{
		2049	if (slot < 0)
		2050	/* overflow, need to check for all hahs slots */
		2051	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2052	infy_wd (EV_A_ slot, wd, ev);
		2053	else
		2054	{
		2055	WL w_;
		2056
		2057	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2058	{
		2059	ev_stat *w = (ev_stat *)w_;
		2060	w_ = w_->next; /* lets us remove this watcher and all before it */
		2061
		2062	if (w->wd == wd || wd == -1)
		2063	{
		2064	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2065	{
		2066	w->wd = -1;
		2067	infy_add (EV_A_ w); /* re-add, no matter what */
		2068	}
		2069
		2070	stat_timer_cb (EV_A_ &w->timer, 0);
		2071	}
		2072	}
		2073	}
		2074	}
		2075
430	static void	2076	static void
431	ev_start (struct ev_watcher *w, int active)	2077	infy_cb (EV_P_ ev_io *w, int revents)
432	{	2078	{
433	w->pending = 0;	2079	char buf [EV_INOTIFY_BUFSIZE];
434	w->active = active;	2080	struct inotify_event *ev = (struct inotify_event *)buf;
		2081	int ofs;
		2082	int len = read (fs_fd, buf, sizeof (buf));
		2083
		2084	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2085	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2086	}
		2087
		2088	void inline_size
		2089	infy_init (EV_P)
		2090	{
		2091	if (fs_fd != -2)
		2092	return;
		2093
		2094	fs_fd = inotify_init ();
		2095
		2096	if (fs_fd >= 0)
		2097	{
		2098	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2099	ev_set_priority (&fs_w, EV_MAXPRI);
		2100	ev_io_start (EV_A_ &fs_w);
		2101	}
		2102	}
		2103
		2104	void inline_size
		2105	infy_fork (EV_P)
		2106	{
		2107	int slot;
		2108
		2109	if (fs_fd < 0)
		2110	return;
		2111
		2112	close (fs_fd);
		2113	fs_fd = inotify_init ();
		2114
		2115	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2116	{
		2117	WL w_ = fs_hash [slot].head;
		2118	fs_hash [slot].head = 0;
		2119
		2120	while (w_)
		2121	{
		2122	ev_stat *w = (ev_stat *)w_;
		2123	w_ = w_->next; /* lets us add this watcher */
		2124
		2125	w->wd = -1;
		2126
		2127	if (fs_fd >= 0)
		2128	infy_add (EV_A_ w); /* re-add, no matter what */
		2129	else
		2130	ev_timer_start (EV_A_ &w->timer);
		2131	}
		2132
		2133	}
		2134	}
		2135
		2136	#endif
		2137
		2138	void
		2139	ev_stat_stat (EV_P_ ev_stat *w)
		2140	{
		2141	if (lstat (w->path, &w->attr) < 0)
		2142	w->attr.st_nlink = 0;
		2143	else if (!w->attr.st_nlink)
		2144	w->attr.st_nlink = 1;
		2145	}
		2146
		2147	static void noinline
		2148	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2149	{
		2150	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2151
		2152	/* we copy this here each the time so that */
		2153	/* prev has the old value when the callback gets invoked */
		2154	w->prev = w->attr;
		2155	ev_stat_stat (EV_A_ w);
		2156
		2157	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2158	if (
		2159	w->prev.st_dev != w->attr.st_dev
		2160	|| w->prev.st_ino != w->attr.st_ino
		2161	|| w->prev.st_mode != w->attr.st_mode
		2162	|| w->prev.st_nlink != w->attr.st_nlink
		2163	|| w->prev.st_uid != w->attr.st_uid
		2164	|| w->prev.st_gid != w->attr.st_gid
		2165	|| w->prev.st_rdev != w->attr.st_rdev
		2166	|| w->prev.st_size != w->attr.st_size
		2167	|| w->prev.st_atime != w->attr.st_atime
		2168	|| w->prev.st_mtime != w->attr.st_mtime
		2169	|| w->prev.st_ctime != w->attr.st_ctime
		2170	) {
		2171	#if EV_USE_INOTIFY
		2172	infy_del (EV_A_ w);
		2173	infy_add (EV_A_ w);
		2174	ev_stat_stat (EV_A_ w); /* avoid race... */
		2175	#endif
		2176
		2177	ev_feed_event (EV_A_ w, EV_STAT);
		2178	}
		2179	}
		2180
		2181	void
		2182	ev_stat_start (EV_P_ ev_stat *w)
		2183	{
		2184	if (expect_false (ev_is_active (w)))
		2185	return;
		2186
		2187	/* since we use memcmp, we need to clear any padding data etc. */
		2188	memset (&w->prev, 0, sizeof (ev_statdata));
		2189	memset (&w->attr, 0, sizeof (ev_statdata));
		2190
		2191	ev_stat_stat (EV_A_ w);
		2192
		2193	if (w->interval < MIN_STAT_INTERVAL)
		2194	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2195
		2196	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2197	ev_set_priority (&w->timer, ev_priority (w));
		2198
		2199	#if EV_USE_INOTIFY
		2200	infy_init (EV_A);
		2201
		2202	if (fs_fd >= 0)
		2203	infy_add (EV_A_ w);
		2204	else
		2205	#endif
		2206	ev_timer_start (EV_A_ &w->timer);
		2207
		2208	ev_start (EV_A_ (W)w, 1);
		2209	}
		2210
		2211	void
		2212	ev_stat_stop (EV_P_ ev_stat *w)
		2213	{
		2214	clear_pending (EV_A_ (W)w);
		2215	if (expect_false (!ev_is_active (w)))
		2216	return;
		2217
		2218	#if EV_USE_INOTIFY
		2219	infy_del (EV_A_ w);
		2220	#endif
		2221	ev_timer_stop (EV_A_ &w->timer);
		2222
		2223	ev_stop (EV_A_ (W)w);
		2224	}
		2225	#endif
		2226
		2227	#if EV_IDLE_ENABLE
		2228	void
		2229	ev_idle_start (EV_P_ ev_idle *w)
		2230	{
		2231	if (expect_false (ev_is_active (w)))
		2232	return;
		2233
		2234	pri_adjust (EV_A_ (W)w);
		2235
		2236	{
		2237	int active = ++idlecnt [ABSPRI (w)];
		2238
		2239	++idleall;
		2240	ev_start (EV_A_ (W)w, active);
		2241
		2242	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2243	idles [ABSPRI (w)][active - 1] = w;
		2244	}
		2245	}
		2246
		2247	void
		2248	ev_idle_stop (EV_P_ ev_idle *w)
		2249	{
		2250	clear_pending (EV_A_ (W)w);
		2251	if (expect_false (!ev_is_active (w)))
		2252	return;
		2253
		2254	{
		2255	int active = ((W)w)->active;
		2256
		2257	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2258	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2259
		2260	ev_stop (EV_A_ (W)w);
		2261	--idleall;
		2262	}
		2263	}
		2264	#endif
		2265
		2266	void
		2267	ev_prepare_start (EV_P_ ev_prepare *w)
		2268	{
		2269	if (expect_false (ev_is_active (w)))
		2270	return;
		2271
		2272	ev_start (EV_A_ (W)w, ++preparecnt);
		2273	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2274	prepares [preparecnt - 1] = w;
		2275	}
		2276
		2277	void
		2278	ev_prepare_stop (EV_P_ ev_prepare *w)
		2279	{
		2280	clear_pending (EV_A_ (W)w);
		2281	if (expect_false (!ev_is_active (w)))
		2282	return;
		2283
		2284	{
		2285	int active = ((W)w)->active;
		2286	prepares [active - 1] = prepares [--preparecnt];
		2287	((W)prepares [active - 1])->active = active;
		2288	}
		2289
		2290	ev_stop (EV_A_ (W)w);
		2291	}
		2292
		2293	void
		2294	ev_check_start (EV_P_ ev_check *w)
		2295	{
		2296	if (expect_false (ev_is_active (w)))
		2297	return;
		2298
		2299	ev_start (EV_A_ (W)w, ++checkcnt);
		2300	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2301	checks [checkcnt - 1] = w;
		2302	}
		2303
		2304	void
		2305	ev_check_stop (EV_P_ ev_check *w)
		2306	{
		2307	clear_pending (EV_A_ (W)w);
		2308	if (expect_false (!ev_is_active (w)))
		2309	return;
		2310
		2311	{
		2312	int active = ((W)w)->active;
		2313	checks [active - 1] = checks [--checkcnt];
		2314	((W)checks [active - 1])->active = active;
		2315	}
		2316
		2317	ev_stop (EV_A_ (W)w);
		2318	}
		2319
		2320	#if EV_EMBED_ENABLE
		2321	void noinline
		2322	ev_embed_sweep (EV_P_ ev_embed *w)
		2323	{
		2324	ev_loop (w->other, EVLOOP_NONBLOCK);
435	}	2325	}
436		2326
437	static void	2327	static void
438	ev_stop (struct ev_watcher *w)	2328	embed_io_cb (EV_P_ ev_io *io, int revents)
439	{	2329	{
440	if (w->pending)	2330	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
441	pendings [w->pending - 1].w = 0;
442		2331
443	w->active = 0;
444	/* nop */
445	}
446
447	void
448	evio_start (struct ev_io *w)
449	{
450	if (ev_is_active (w))	2332	if (ev_cb (w))
451	return;	2333	ev_feed_event (EV_A_ (W)w, EV_EMBED);
452
453	int fd = w->fd;
454
455	ev_start ((struct ev_watcher *)w, 1);
456	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
457	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
458
459	++fdchangecnt;
460	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
461	fdchanges [fdchangecnt - 1] = fd;
462	}
463
464	void
465	evio_stop (struct ev_io *w)
466	{
467	if (!ev_is_active (w))
468	return;
469
470	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);
471	ev_stop ((struct ev_watcher *)w);
472
473	++fdchangecnt;
474	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
475	fdchanges [fdchangecnt - 1] = w->fd;
476	}
477
478	void
479	evtimer_start (struct ev_timer *w)
480	{
481	if (ev_is_active (w))
482	return;
483
484	if (w->is_abs)
485	{
486	/* this formula differs from the one in timer_reify becuse we do not round up */
487	if (w->repeat)
488	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
489
490	ev_start ((struct ev_watcher *)w, ++atimercnt);
491	array_needsize (atimers, atimermax, atimercnt, );
492	atimers [atimercnt - 1] = w;
493	upheap (atimers, atimercnt - 1);
494	}
495	else	2334	else
		2335	ev_loop (w->other, EVLOOP_NONBLOCK);
		2336	}
		2337
		2338	static void
		2339	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2340	{
		2341	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2342
496	{	2343	{
497	w->at += now;	2344	struct ev_loop *loop = w->other;
498		2345
499	ev_start ((struct ev_watcher *)w, ++rtimercnt);	2346	while (fdchangecnt)
500	array_needsize (rtimers, rtimermax, rtimercnt, );
501	rtimers [rtimercnt - 1] = w;
502	upheap (rtimers, rtimercnt - 1);
503	}
504
505	}
506
507	void
508	evtimer_stop (struct ev_timer *w)
509	{
510	if (!ev_is_active (w))
511	return;
512
513	if (w->is_abs)
514	{
515	if (w->active < atimercnt--)
516	{	2347	{
517	atimers [w->active - 1] = atimers [atimercnt];	2348	fd_reify (EV_A);
518	downheap (atimers, atimercnt, w->active - 1);	2349	ev_loop (EV_A_ EVLOOP_NONBLOCK);
519	}	2350	}
520	}	2351	}
521	else
522	{
523	if (w->active < rtimercnt--)
524	{
525	rtimers [w->active - 1] = rtimers [rtimercnt];
526	downheap (rtimers, rtimercnt, w->active - 1);
527	}
528	}
529
530	ev_stop ((struct ev_watcher *)w);
531	}	2352	}
532		2353
533	void	2354	#if 0
534	evsignal_start (struct ev_signal *w)	2355	static void
		2356	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
535	{	2357	{
		2358	ev_idle_stop (EV_A_ idle);
		2359	}
		2360	#endif
		2361
		2362	void
		2363	ev_embed_start (EV_P_ ev_embed *w)
		2364	{
536	if (ev_is_active (w))	2365	if (expect_false (ev_is_active (w)))
537	return;	2366	return;
538		2367
539	ev_start ((struct ev_watcher *)w, 1);	2368	{
540	array_needsize (signals, signalmax, w->signum, signals_init);	2369	struct ev_loop *loop = w->other;
541	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2370	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
542	}	2371	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2372	}
543		2373
		2374	ev_set_priority (&w->io, ev_priority (w));
		2375	ev_io_start (EV_A_ &w->io);
		2376
		2377	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2378	ev_set_priority (&w->prepare, EV_MINPRI);
		2379	ev_prepare_start (EV_A_ &w->prepare);
		2380
		2381	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2382
		2383	ev_start (EV_A_ (W)w, 1);
		2384	}
		2385
544	void	2386	void
545	evsignal_stop (struct ev_signal *w)	2387	ev_embed_stop (EV_P_ ev_embed *w)
546	{	2388	{
		2389	clear_pending (EV_A_ (W)w);
547	if (!ev_is_active (w))	2390	if (expect_false (!ev_is_active (w)))
548	return;	2391	return;
549		2392
550	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	2393	ev_io_stop (EV_A_ &w->io);
551	ev_stop ((struct ev_watcher *)w);	2394	ev_prepare_stop (EV_A_ &w->prepare);
		2395
		2396	ev_stop (EV_A_ (W)w);
552	}	2397	}
		2398	#endif
		2399
		2400	#if EV_FORK_ENABLE
		2401	void
		2402	ev_fork_start (EV_P_ ev_fork *w)
		2403	{
		2404	if (expect_false (ev_is_active (w)))
		2405	return;
		2406
		2407	ev_start (EV_A_ (W)w, ++forkcnt);
		2408	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2409	forks [forkcnt - 1] = w;
		2410	}
		2411
		2412	void
		2413	ev_fork_stop (EV_P_ ev_fork *w)
		2414	{
		2415	clear_pending (EV_A_ (W)w);
		2416	if (expect_false (!ev_is_active (w)))
		2417	return;
		2418
		2419	{
		2420	int active = ((W)w)->active;
		2421	forks [active - 1] = forks [--forkcnt];
		2422	((W)forks [active - 1])->active = active;
		2423	}
		2424
		2425	ev_stop (EV_A_ (W)w);
		2426	}
		2427	#endif
		2428
		2429	#if EV_ASYNC_ENABLE
		2430	void
		2431	ev_async_start (EV_P_ ev_async *w)
		2432	{
		2433	if (expect_false (ev_is_active (w)))
		2434	return;
		2435
		2436	evpipe_init (EV_A);
		2437
		2438	ev_start (EV_A_ (W)w, ++asynccnt);
		2439	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2440	asyncs [asynccnt - 1] = w;
		2441	}
		2442
		2443	void
		2444	ev_async_stop (EV_P_ ev_async *w)
		2445	{
		2446	clear_pending (EV_A_ (W)w);
		2447	if (expect_false (!ev_is_active (w)))
		2448	return;
		2449
		2450	{
		2451	int active = ((W)w)->active;
		2452	asyncs [active - 1] = asyncs [--asynccnt];
		2453	((W)asyncs [active - 1])->active = active;
		2454	}
		2455
		2456	ev_stop (EV_A_ (W)w);
		2457	}
		2458
		2459	void
		2460	ev_async_send (EV_P_ ev_async *w)
		2461	{
		2462	w->sent = 1;
		2463	evpipe_write (EV_A_ 0, 1);
		2464	}
		2465	#endif
553		2466
554	/*****************************************************************************/	2467	/*****************************************************************************/
555	#if 1	2468
		2469	struct ev_once
		2470	{
		2471	ev_io io;
		2472	ev_timer to;
		2473	void (*cb)(int revents, void *arg);
		2474	void *arg;
		2475	};
556		2476
557	static void	2477	static void
558	sin_cb (struct ev_io *w, int revents)	2478	once_cb (EV_P_ struct ev_once *once, int revents)
559	{	2479	{
560	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2480	void (*cb)(int revents, void *arg) = once->cb;
		2481	void *arg = once->arg;
		2482
		2483	ev_io_stop (EV_A_ &once->io);
		2484	ev_timer_stop (EV_A_ &once->to);
		2485	ev_free (once);
		2486
		2487	cb (revents, arg);
561	}	2488	}
562		2489
563	static void	2490	static void
		2491	once_cb_io (EV_P_ ev_io *w, int revents)
		2492	{
		2493	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		2494	}
		2495
		2496	static void
564	ocb (struct ev_timer *w, int revents)	2497	once_cb_to (EV_P_ ev_timer *w, int revents)
565	{	2498	{
566	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2499	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
567	evtimer_stop (w);
568	evtimer_start (w);
569	}	2500	}
570		2501
571	int main (void)	2502	void
		2503	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
572	{	2504	{
573	struct ev_io sin;	2505	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
574		2506
575	ev_init (0);	2507	if (expect_false (!once))
576
577	evw_init (&sin, sin_cb, 55);
578	evio_set (&sin, 0, EV_READ);
579	evio_start (&sin);
580
581	struct ev_timer t[10000];
582
583	#if 1
584	int i;
585	for (i = 0; i < 10000; ++i)
586	{
587	struct ev_timer *w = t + i;
588	evw_init (w, ocb, i);
589	evtimer_set_abs (w, drand48 (), 0.99775533);
590	evtimer_start (w);
591	if (drand48 () < 0.5)
592	evtimer_stop (w);
593	}	2508	{
594	#endif	2509	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
595
596	struct ev_timer t1;
597	evw_init (&t1, ocb, 0);
598	evtimer_set_abs (&t1, 5, 10);
599	evtimer_start (&t1);
600
601	ev_loop (0);
602
603	return 0;	2510	return;
604	}	2511	}
605		2512
606	#endif	2513	once->cb = cb;
		2514	once->arg = arg;
607		2515
		2516	ev_init (&once->io, once_cb_io);
		2517	if (fd >= 0)
		2518	{
		2519	ev_io_set (&once->io, fd, events);
		2520	ev_io_start (EV_A_ &once->io);
		2521	}
608		2522
		2523	ev_init (&once->to, once_cb_to);
		2524	if (timeout >= 0.)
		2525	{
		2526	ev_timer_set (&once->to, timeout, 0.);
		2527	ev_timer_start (EV_A_ &once->to);
		2528	}
		2529	}
609		2530
		2531	#if EV_MULTIPLICITY
		2532	#include "ev_wrap.h"
		2533	#endif
610		2534
		2535	#ifdef __cplusplus
		2536	}
		2537	#endif
		2538

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