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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 1.140 by root, Mon Nov 26 19:49:36 2007 UTC

		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without
		8	* modification, are permitted provided that the following conditions are
		9	* met:
		10	*
		11	* * Redistributions of source code must retain the above copyright
		12	* notice, this list of conditions and the following disclaimer.
		13	*
		14	* * Redistributions in binary form must reproduce the above
		15	* copyright notice, this list of conditions and the following
		16	* disclaimer in the documentation and/or other materials provided
		17	* with the distribution.
		18	*
		19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		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	*/
		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
		37	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
		40	# include "config.h"
		41	# endif
		42
		43	# if HAVE_CLOCK_GETTIME
		44	# ifndef EV_USE_MONOTONIC
		45	# define EV_USE_MONOTONIC 1
		46	# endif
		47	# ifndef EV_USE_REALTIME
		48	# define EV_USE_REALTIME 1
		49	# endif
		50	# else
		51	# ifndef EV_USE_MONOTONIC
		52	# define EV_USE_MONOTONIC 0
		53	# endif
		54	# ifndef EV_USE_REALTIME
		55	# define EV_USE_REALTIME 0
		56	# endif
		57	# endif
		58
		59	# ifndef EV_USE_SELECT
		60	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		61	# define EV_USE_SELECT 1
		62	# else
		63	# define EV_USE_SELECT 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_POLL
		68	# if HAVE_POLL && HAVE_POLL_H
		69	# define EV_USE_POLL 1
		70	# else
		71	# define EV_USE_POLL 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_EPOLL
		76	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		77	# define EV_USE_EPOLL 1
		78	# else
		79	# define EV_USE_EPOLL 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_KQUEUE
		84	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		85	# define EV_USE_KQUEUE 1
		86	# else
		87	# define EV_USE_KQUEUE 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_PORT
		92	# if HAVE_PORT_H && HAVE_PORT_CREATE
		93	# define EV_USE_PORT 1
		94	# else
		95	# define EV_USE_PORT 0
		96	# endif
		97	# endif
		98
		99	#endif
		100
1	#include <math.h>	101	#include <math.h>
2	#include <stdlib.h>	102	#include <stdlib.h>
		103	#include <fcntl.h>
		104	#include <stddef.h>
3		105
4	#include <stdio.h>	106	#include <stdio.h>
5		107
6	#include <assert.h>	108	#include <assert.h>
7	#include <errno.h>	109	#include <errno.h>
8	#include <sys/time.h>	110	#include <sys/types.h>
9	#include <time.h>	111	#include <time.h>
10		112
		113	#include <signal.h>
		114
		115	#ifndef _WIN32
		116	# include <sys/time.h>
		117	# include <sys/wait.h>
		118	# include <unistd.h>
		119	#else
		120	# define WIN32_LEAN_AND_MEAN
		121	# include <windows.h>
		122	# ifndef EV_SELECT_IS_WINSOCKET
		123	# define EV_SELECT_IS_WINSOCKET 1
		124	# endif
		125	#endif
		126
		127	/**/
		128
		129	#ifndef EV_USE_MONOTONIC
		130	# define EV_USE_MONOTONIC 0
		131	#endif
		132
		133	#ifndef EV_USE_REALTIME
		134	# define EV_USE_REALTIME 0
		135	#endif
		136
		137	#ifndef EV_USE_SELECT
		138	# define EV_USE_SELECT 1
		139	#endif
		140
		141	#ifndef EV_USE_POLL
		142	# ifdef _WIN32
		143	# define EV_USE_POLL 0
		144	# else
		145	# define EV_USE_POLL 1
		146	# endif
		147	#endif
		148
		149	#ifndef EV_USE_EPOLL
		150	# define EV_USE_EPOLL 0
		151	#endif
		152
		153	#ifndef EV_USE_KQUEUE
		154	# define EV_USE_KQUEUE 0
		155	#endif
		156
		157	#ifndef EV_USE_PORT
		158	# define EV_USE_PORT 0
		159	#endif
		160
		161	/**/
		162
11	#ifdef CLOCK_MONOTONIC	163	#ifndef CLOCK_MONOTONIC
		164	# undef EV_USE_MONOTONIC
12	# define HAVE_MONOTONIC 1	165	# define EV_USE_MONOTONIC 0
13	#endif	166	#endif
14		167
		168	#ifndef CLOCK_REALTIME
		169	# undef EV_USE_REALTIME
15	#define HAVE_REALTIME 1	170	# define EV_USE_REALTIME 0
16	#define HAVE_EPOLL 1	171	#endif
17	#define HAVE_SELECT 1	172
		173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
		175	#endif
		176
		177	/**/
18		178
19	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	179	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
20	#define MAX_BLOCKTIME 60.	180	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		181	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		182	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
21		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
22	#include "ev.h"	187	# include "ev.h"
		188	#endif
23		189
24	struct ev_watcher {	190	#if __GNUC__ >= 3
25	EV_WATCHER (ev_watcher);	191	# define expect(expr,value) __builtin_expect ((expr),(value))
26	};	192	# define inline_size static inline /* inline for codesize */
		193	# if EV_MINIMAL
		194	# define noinline __attribute__ ((noinline))
		195	# define inline_speed static noinline
		196	# else
		197	# define noinline
		198	# define inline_speed static inline
		199	# endif
		200	#else
		201	# define expect(expr,value) (expr)
		202	# define inline_speed static
		203	# define inline_minimal static
		204	# define noinline
		205	#endif
27		206
28	struct ev_watcher_list {	207	#define expect_false(expr) expect ((expr) != 0, 0)
29	EV_WATCHER_LIST (ev_watcher_list);	208	#define expect_true(expr) expect ((expr) != 0, 1)
30	};
31		209
32	static ev_tstamp now, diff; /* monotonic clock */	210	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		211	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		212
		213	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		214	#define EMPTY2(a,b) /* used to suppress some warnings */
		215
		216	typedef ev_watcher *W;
		217	typedef ev_watcher_list *WL;
		218	typedef ev_watcher_time *WT;
		219
		220	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		221
		222	#ifdef _WIN32
		223	# include "ev_win32.c"
		224	#endif
		225
		226	/*****************************************************************************/
		227
		228	static void (*syserr_cb)(const char *msg);
		229
		230	void ev_set_syserr_cb (void (*cb)(const char *msg))
		231	{
		232	syserr_cb = cb;
		233	}
		234
		235	static void
		236	syserr (const char *msg)
		237	{
		238	if (!msg)
		239	msg = "(libev) system error";
		240
		241	if (syserr_cb)
		242	syserr_cb (msg);
		243	else
		244	{
		245	perror (msg);
		246	abort ();
		247	}
		248	}
		249
		250	static void *(*alloc)(void *ptr, long size);
		251
		252	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		253	{
		254	alloc = cb;
		255	}
		256
		257	static void *
		258	ev_realloc (void *ptr, long size)
		259	{
		260	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		261
		262	if (!ptr && size)
		263	{
		264	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		265	abort ();
		266	}
		267
		268	return ptr;
		269	}
		270
		271	#define ev_malloc(size) ev_realloc (0, (size))
		272	#define ev_free(ptr) ev_realloc ((ptr), 0)
		273
		274	/*****************************************************************************/
		275
		276	typedef struct
		277	{
		278	WL head;
		279	unsigned char events;
		280	unsigned char reify;
		281	#if EV_SELECT_IS_WINSOCKET
		282	SOCKET handle;
		283	#endif
		284	} ANFD;
		285
		286	typedef struct
		287	{
		288	W w;
		289	int events;
		290	} ANPENDING;
		291
		292	#if EV_MULTIPLICITY
		293
		294	struct ev_loop
		295	{
		296	ev_tstamp ev_rt_now;
		297	#define ev_rt_now ((loop)->ev_rt_now)
		298	#define VAR(name,decl) decl;
		299	#include "ev_vars.h"
		300	#undef VAR
		301	};
		302	#include "ev_wrap.h"
		303
		304	static struct ev_loop default_loop_struct;
		305	struct ev_loop *ev_default_loop_ptr;
		306
		307	#else
		308
33	ev_tstamp ev_now;	309	ev_tstamp ev_rt_now;
34	int ev_method;	310	#define VAR(name,decl) static decl;
		311	#include "ev_vars.h"
		312	#undef VAR
35		313
36	static int have_monotonic; /* runtime */	314	static int ev_default_loop_ptr;
37		315
38	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	316	#endif
39	static void (*method_modify)(int fd, int oev, int nev);
40	static void (*method_poll)(ev_tstamp timeout);
41		317
42	ev_tstamp	318	/*****************************************************************************/
		319
		320	ev_tstamp noinline
43	ev_time (void)	321	ev_time (void)
44	{	322	{
45	#if HAVE_REALTIME	323	#if EV_USE_REALTIME
46	struct timespec ts;	324	struct timespec ts;
47	clock_gettime (CLOCK_REALTIME, &ts);	325	clock_gettime (CLOCK_REALTIME, &ts);
48	return ts.tv_sec + ts.tv_nsec * 1e-9;	326	return ts.tv_sec + ts.tv_nsec * 1e-9;
49	#else	327	#else
50	struct timeval tv;	328	struct timeval tv;
51	gettimeofday (&tv, 0);	329	gettimeofday (&tv, 0);
52	return tv.tv_sec + tv.tv_usec * 1e-6;	330	return tv.tv_sec + tv.tv_usec * 1e-6;
53	#endif	331	#endif
54	}	332	}
55		333
56	static ev_tstamp	334	ev_tstamp inline_size
57	get_clock (void)	335	get_clock (void)
58	{	336	{
59	#if HAVE_MONOTONIC	337	#if EV_USE_MONOTONIC
60	if (have_monotonic)	338	if (expect_true (have_monotonic))
61	{	339	{
62	struct timespec ts;	340	struct timespec ts;
63	clock_gettime (CLOCK_MONOTONIC, &ts);	341	clock_gettime (CLOCK_MONOTONIC, &ts);
64	return ts.tv_sec + ts.tv_nsec * 1e-9;	342	return ts.tv_sec + ts.tv_nsec * 1e-9;
65	}	343	}
66	#endif	344	#endif
67		345
68	return ev_time ();	346	return ev_time ();
69	}	347	}
70		348
		349	#if EV_MULTIPLICITY
		350	ev_tstamp
		351	ev_now (EV_P)
		352	{
		353	return ev_rt_now;
		354	}
		355	#endif
		356
		357	#define array_roundsize(type,n) (((n) | 4) & ~3)
		358
71	#define array_needsize(base,cur,cnt,init) \	359	#define array_needsize(type,base,cur,cnt,init) \
72	if ((cnt) > cur) \	360	if (expect_false ((cnt) > cur)) \
73	{ \	361	{ \
74	int newcnt = cur ? cur << 1 : 16; \	362	int newcnt = cur; \
75	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	363	do \
		364	{ \
		365	newcnt = array_roundsize (type, newcnt << 1); \
		366	} \
		367	while ((cnt) > newcnt); \
		368	\
76	base = realloc (base, sizeof (*base) * (newcnt)); \	369	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
77	init (base + cur, newcnt - cur); \	370	init (base + cur, newcnt - cur); \
78	cur = newcnt; \	371	cur = newcnt; \
		372	}
		373
		374	#define array_slim(type,stem) \
		375	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		376	{ \
		377	stem ## max = array_roundsize (stem ## cnt >> 1); \
		378	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		379	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		380	}
		381
		382	#define array_free(stem, idx) \
		383	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		384
		385	/*****************************************************************************/
		386
		387	void inline_size
		388	anfds_init (ANFD *base, int count)
		389	{
		390	while (count--)
79	}	391	{
		392	base->head = 0;
		393	base->events = EV_NONE;
		394	base->reify = 0;
80		395
81	typedef struct	396	++base;
82	{	397	}
83	struct ev_io *head;	398	}
84	unsigned char wev, rev; /* want, received event set */
85	} ANFD;
86		399
87	static ANFD *anfds;	400	void noinline
88	static int anfdmax;	401	ev_feed_event (EV_P_ void *w, int revents)
		402	{
		403	W w_ = (W)w;
89		404
90	static int *fdchanges;	405	if (expect_false (w_->pending))
91	static int fdchangemax, fdchangecnt;	406	{
		407	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		408	return;
		409	}
		410
		411	w_->pending = ++pendingcnt [ABSPRI (w_)];
		412	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		413	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		414	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		415	}
92		416
93	static void	417	static void
94	anfds_init (ANFD *base, int count)	418	queue_events (EV_P_ W *events, int eventcnt, int type)
95	{	419	{
96	while (count--)	420	int i;
97	{
98	base->head = 0;
99	base->wev = base->rev = EV_NONE;
100	++base;
101	}
102	}
103		421
104	typedef struct	422	for (i = 0; i < eventcnt; ++i)
105	{	423	ev_feed_event (EV_A_ events [i], type);
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	}	424	}
121		425
122	static void	426	void inline_speed
123	fd_event (int fd, int events)	427	fd_event (EV_P_ int fd, int revents)
124	{	428	{
125	ANFD *anfd = anfds + fd;	429	ANFD *anfd = anfds + fd;
126	struct ev_io *w;	430	ev_io *w;
127		431
128	for (w = anfd->head; w; w = w->next)	432	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
129	{	433	{
130	int ev = w->events & events;	434	int ev = w->events & revents;
131		435
132	if (ev)	436	if (ev)
133	event ((struct ev_watcher *)w, ev);	437	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	{	438	}
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	}	439	}
159		440
160	static void	441	void
161	downheap (struct ev_timer **timers, int N, int k)	442	ev_feed_fd_event (EV_P_ int fd, int revents)
162	{	443	{
163	struct ev_timer *w = timers [k];	444	fd_event (EV_A_ fd, revents);
164
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	}	445	}
183		446
184	static struct ev_signal **signals;	447	/*****************************************************************************/
185	static int signalmax;
186		448
187	static void	449	void inline_size
188	signals_init (struct ev_signal **base, int count)	450	fd_reify (EV_P)
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	{	451	{
247	int i;	452	int i;
248		453
249	for (i = 0; i < fdchangecnt; ++i)	454	for (i = 0; i < fdchangecnt; ++i)
250	{	455	{
251	int fd = fdchanges [i];	456	int fd = fdchanges [i];
252	ANFD *anfd = anfds + fd;	457	ANFD *anfd = anfds + fd;
253	struct ev_io *w;	458	ev_io *w;
254		459
255	int wev = 0;	460	int events = 0;
256		461
257	for (w = anfd->head; w; w = w->next)	462	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
258	wev |= w->events;	463	events |= w->events;
259		464
260	if (anfd->wev != wev)	465	#if EV_SELECT_IS_WINSOCKET
		466	if (events)
261	{	467	{
262	method_modify (fd, anfd->wev, wev);	468	unsigned long argp;
263	anfd->wev = wev;	469	anfd->handle = _get_osfhandle (fd);
		470	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
264	}	471	}
		472	#endif
		473
		474	anfd->reify = 0;
		475
		476	backend_modify (EV_A_ fd, anfd->events, events);
		477	anfd->events = events;
265	}	478	}
266		479
267	fdchangecnt = 0;	480	fdchangecnt = 0;
268	}	481	}
269		482
		483	void inline_size
		484	fd_change (EV_P_ int fd)
		485	{
		486	if (expect_false (anfds [fd].reify))
		487	return;
		488
		489	anfds [fd].reify = 1;
		490
		491	++fdchangecnt;
		492	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		493	fdchanges [fdchangecnt - 1] = fd;
		494	}
		495
		496	void inline_speed
		497	fd_kill (EV_P_ int fd)
		498	{
		499	ev_io *w;
		500
		501	while ((w = (ev_io *)anfds [fd].head))
		502	{
		503	ev_io_stop (EV_A_ w);
		504	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		505	}
		506	}
		507
		508	int inline_size
		509	fd_valid (int fd)
		510	{
		511	#ifdef _WIN32
		512	return _get_osfhandle (fd) != -1;
		513	#else
		514	return fcntl (fd, F_GETFD) != -1;
		515	#endif
		516	}
		517
		518	/* called on EBADF to verify fds */
		519	static void noinline
		520	fd_ebadf (EV_P)
		521	{
		522	int fd;
		523
		524	for (fd = 0; fd < anfdmax; ++fd)
		525	if (anfds [fd].events)
		526	if (!fd_valid (fd) == -1 && errno == EBADF)
		527	fd_kill (EV_A_ fd);
		528	}
		529
		530	/* called on ENOMEM in select/poll to kill some fds and retry */
		531	static void noinline
		532	fd_enomem (EV_P)
		533	{
		534	int fd;
		535
		536	for (fd = anfdmax; fd--; )
		537	if (anfds [fd].events)
		538	{
		539	fd_kill (EV_A_ fd);
		540	return;
		541	}
		542	}
		543
		544	/* usually called after fork if backend needs to re-arm all fds from scratch */
		545	static void noinline
		546	fd_rearm_all (EV_P)
		547	{
		548	int fd;
		549
		550	/* this should be highly optimised to not do anything but set a flag */
		551	for (fd = 0; fd < anfdmax; ++fd)
		552	if (anfds [fd].events)
		553	{
		554	anfds [fd].events = 0;
		555	fd_change (EV_A_ fd);
		556	}
		557	}
		558
		559	/*****************************************************************************/
		560
		561	void inline_speed
		562	upheap (WT *heap, int k)
		563	{
		564	WT w = heap [k];
		565
		566	while (k && heap [k >> 1]->at > w->at)
		567	{
		568	heap [k] = heap [k >> 1];
		569	((W)heap [k])->active = k + 1;
		570	k >>= 1;
		571	}
		572
		573	heap [k] = w;
		574	((W)heap [k])->active = k + 1;
		575
		576	}
		577
		578	void inline_speed
		579	downheap (WT *heap, int N, int k)
		580	{
		581	WT w = heap [k];
		582
		583	while (k < (N >> 1))
		584	{
		585	int j = k << 1;
		586
		587	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		588	++j;
		589
		590	if (w->at <= heap [j]->at)
		591	break;
		592
		593	heap [k] = heap [j];
		594	((W)heap [k])->active = k + 1;
		595	k = j;
		596	}
		597
		598	heap [k] = w;
		599	((W)heap [k])->active = k + 1;
		600	}
		601
		602	void inline_size
		603	adjustheap (WT *heap, int N, int k)
		604	{
		605	upheap (heap, k);
		606	downheap (heap, N, k);
		607	}
		608
		609	/*****************************************************************************/
		610
		611	typedef struct
		612	{
		613	WL head;
		614	sig_atomic_t volatile gotsig;
		615	} ANSIG;
		616
		617	static ANSIG *signals;
		618	static int signalmax;
		619
		620	static int sigpipe [2];
		621	static sig_atomic_t volatile gotsig;
		622	static ev_io sigev;
		623
		624	void inline_size
		625	signals_init (ANSIG *base, int count)
		626	{
		627	while (count--)
		628	{
		629	base->head = 0;
		630	base->gotsig = 0;
		631
		632	++base;
		633	}
		634	}
		635
270	static void	636	static void
271	call_pending ()	637	sighandler (int signum)
		638	{
		639	#if _WIN32
		640	signal (signum, sighandler);
		641	#endif
		642
		643	signals [signum - 1].gotsig = 1;
		644
		645	if (!gotsig)
		646	{
		647	int old_errno = errno;
		648	gotsig = 1;
		649	write (sigpipe [1], &signum, 1);
		650	errno = old_errno;
		651	}
		652	}
		653
		654	void noinline
		655	ev_feed_signal_event (EV_P_ int signum)
		656	{
		657	WL w;
		658
		659	#if EV_MULTIPLICITY
		660	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		661	#endif
		662
		663	--signum;
		664
		665	if (signum < 0 || signum >= signalmax)
		666	return;
		667
		668	signals [signum].gotsig = 0;
		669
		670	for (w = signals [signum].head; w; w = w->next)
		671	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		672	}
		673
		674	static void
		675	sigcb (EV_P_ ev_io *iow, int revents)
		676	{
		677	int signum;
		678
		679	read (sigpipe [0], &revents, 1);
		680	gotsig = 0;
		681
		682	for (signum = signalmax; signum--; )
		683	if (signals [signum].gotsig)
		684	ev_feed_signal_event (EV_A_ signum + 1);
		685	}
		686
		687	void inline_size
		688	fd_intern (int fd)
		689	{
		690	#ifdef _WIN32
		691	int arg = 1;
		692	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		693	#else
		694	fcntl (fd, F_SETFD, FD_CLOEXEC);
		695	fcntl (fd, F_SETFL, O_NONBLOCK);
		696	#endif
		697	}
		698
		699	static void noinline
		700	siginit (EV_P)
		701	{
		702	fd_intern (sigpipe [0]);
		703	fd_intern (sigpipe [1]);
		704
		705	ev_io_set (&sigev, sigpipe [0], EV_READ);
		706	ev_io_start (EV_A_ &sigev);
		707	ev_unref (EV_A); /* child watcher should not keep loop alive */
		708	}
		709
		710	/*****************************************************************************/
		711
		712	static ev_child *childs [PID_HASHSIZE];
		713
		714	#ifndef _WIN32
		715
		716	static ev_signal childev;
		717
		718	#ifndef WCONTINUED
		719	# define WCONTINUED 0
		720	#endif
		721
		722	void inline_speed
		723	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		724	{
		725	ev_child *w;
		726
		727	for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		728	if (w->pid == pid || !w->pid)
		729	{
		730	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		731	w->rpid = pid;
		732	w->rstatus = status;
		733	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		734	}
		735	}
		736
		737	static void
		738	childcb (EV_P_ ev_signal *sw, int revents)
		739	{
		740	int pid, status;
		741
		742	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		743	{
		744	/* make sure we are called again until all childs have been reaped */
		745	/* we need to do it this way so that the callback gets called before we continue */
		746	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		747
		748	child_reap (EV_A_ sw, pid, pid, status);
		749	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		750	}
		751	}
		752
		753	#endif
		754
		755	/*****************************************************************************/
		756
		757	#if EV_USE_PORT
		758	# include "ev_port.c"
		759	#endif
		760	#if EV_USE_KQUEUE
		761	# include "ev_kqueue.c"
		762	#endif
		763	#if EV_USE_EPOLL
		764	# include "ev_epoll.c"
		765	#endif
		766	#if EV_USE_POLL
		767	# include "ev_poll.c"
		768	#endif
		769	#if EV_USE_SELECT
		770	# include "ev_select.c"
		771	#endif
		772
		773	int
		774	ev_version_major (void)
		775	{
		776	return EV_VERSION_MAJOR;
		777	}
		778
		779	int
		780	ev_version_minor (void)
		781	{
		782	return EV_VERSION_MINOR;
		783	}
		784
		785	/* return true if we are running with elevated privileges and should ignore env variables */
		786	int inline_size
		787	enable_secure (void)
		788	{
		789	#ifdef _WIN32
		790	return 0;
		791	#else
		792	return getuid () != geteuid ()
		793	|| getgid () != getegid ();
		794	#endif
		795	}
		796
		797	unsigned int
		798	ev_supported_backends (void)
		799	{
		800	unsigned int flags = 0;
		801
		802	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		803	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		804	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		805	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		806	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		807
		808	return flags;
		809	}
		810
		811	unsigned int
		812	ev_recommended_backends (void)
		813	{
		814	unsigned int flags = ev_supported_backends ();
		815
		816	#ifndef __NetBSD__
		817	/* kqueue is borked on everything but netbsd apparently */
		818	/* it usually doesn't work correctly on anything but sockets and pipes */
		819	flags &= ~EVBACKEND_KQUEUE;
		820	#endif
		821	#ifdef __APPLE__
		822	// flags &= ~EVBACKEND_KQUEUE; for documentation
		823	flags &= ~EVBACKEND_POLL;
		824	#endif
		825
		826	return flags;
		827	}
		828
		829	unsigned int
		830	ev_embeddable_backends (void)
		831	{
		832	return EVBACKEND_EPOLL
		833	| EVBACKEND_KQUEUE
		834	| EVBACKEND_PORT;
		835	}
		836
		837	unsigned int
		838	ev_backend (EV_P)
		839	{
		840	return backend;
		841	}
		842
		843	static void
		844	loop_init (EV_P_ unsigned int flags)
		845	{
		846	if (!backend)
		847	{
		848	#if EV_USE_MONOTONIC
		849	{
		850	struct timespec ts;
		851	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		852	have_monotonic = 1;
		853	}
		854	#endif
		855
		856	ev_rt_now = ev_time ();
		857	mn_now = get_clock ();
		858	now_floor = mn_now;
		859	rtmn_diff = ev_rt_now - mn_now;
		860
		861	if (!(flags & EVFLAG_NOENV)
		862	&& !enable_secure ()
		863	&& getenv ("LIBEV_FLAGS"))
		864	flags = atoi (getenv ("LIBEV_FLAGS"));
		865
		866	if (!(flags & 0x0000ffffUL))
		867	flags |= ev_recommended_backends ();
		868
		869	backend = 0;
		870	#if EV_USE_PORT
		871	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		872	#endif
		873	#if EV_USE_KQUEUE
		874	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		875	#endif
		876	#if EV_USE_EPOLL
		877	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		878	#endif
		879	#if EV_USE_POLL
		880	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		881	#endif
		882	#if EV_USE_SELECT
		883	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		884	#endif
		885
		886	ev_init (&sigev, sigcb);
		887	ev_set_priority (&sigev, EV_MAXPRI);
		888	}
		889	}
		890
		891	static void
		892	loop_destroy (EV_P)
272	{	893	{
273	int i;	894	int i;
274		895
275	for (i = 0; i < pendingcnt; ++i)	896	#if EV_USE_PORT
		897	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		898	#endif
		899	#if EV_USE_KQUEUE
		900	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		901	#endif
		902	#if EV_USE_EPOLL
		903	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		904	#endif
		905	#if EV_USE_POLL
		906	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		907	#endif
		908	#if EV_USE_SELECT
		909	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		910	#endif
		911
		912	for (i = NUMPRI; i--; )
		913	array_free (pending, [i]);
		914
		915	/* have to use the microsoft-never-gets-it-right macro */
		916	array_free (fdchange, EMPTY0);
		917	array_free (timer, EMPTY0);
		918	#if EV_PERIODIC_ENABLE
		919	array_free (periodic, EMPTY0);
		920	#endif
		921	array_free (idle, EMPTY0);
		922	array_free (prepare, EMPTY0);
		923	array_free (check, EMPTY0);
		924
		925	backend = 0;
		926	}
		927
		928	static void
		929	loop_fork (EV_P)
		930	{
		931	#if EV_USE_PORT
		932	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		933	#endif
		934	#if EV_USE_KQUEUE
		935	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		936	#endif
		937	#if EV_USE_EPOLL
		938	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		939	#endif
		940
		941	if (ev_is_active (&sigev))
		942	{
		943	/* default loop */
		944
		945	ev_ref (EV_A);
		946	ev_io_stop (EV_A_ &sigev);
		947	close (sigpipe [0]);
		948	close (sigpipe [1]);
		949
		950	while (pipe (sigpipe))
		951	syserr ("(libev) error creating pipe");
		952
		953	siginit (EV_A);
276	{	954	}
277	ANPENDING *p = pendings + i;
278		955
279	if (p->w)	956	postfork = 0;
		957	}
		958
		959	#if EV_MULTIPLICITY
		960	struct ev_loop *
		961	ev_loop_new (unsigned int flags)
		962	{
		963	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		964
		965	memset (loop, 0, sizeof (struct ev_loop));
		966
		967	loop_init (EV_A_ flags);
		968
		969	if (ev_backend (EV_A))
		970	return loop;
		971
		972	return 0;
		973	}
		974
		975	void
		976	ev_loop_destroy (EV_P)
		977	{
		978	loop_destroy (EV_A);
		979	ev_free (loop);
		980	}
		981
		982	void
		983	ev_loop_fork (EV_P)
		984	{
		985	postfork = 1;
		986	}
		987
		988	#endif
		989
		990	#if EV_MULTIPLICITY
		991	struct ev_loop *
		992	ev_default_loop_init (unsigned int flags)
		993	#else
		994	int
		995	ev_default_loop (unsigned int flags)
		996	#endif
		997	{
		998	if (sigpipe [0] == sigpipe [1])
		999	if (pipe (sigpipe))
		1000	return 0;
		1001
		1002	if (!ev_default_loop_ptr)
		1003	{
		1004	#if EV_MULTIPLICITY
		1005	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1006	#else
		1007	ev_default_loop_ptr = 1;
		1008	#endif
		1009
		1010	loop_init (EV_A_ flags);
		1011
		1012	if (ev_backend (EV_A))
280	{	1013	{
281	p->w->pending = 0;	1014	siginit (EV_A);
282	p->w->cb (p->w, p->events);	1015
		1016	#ifndef _WIN32
		1017	ev_signal_init (&childev, childcb, SIGCHLD);
		1018	ev_set_priority (&childev, EV_MAXPRI);
		1019	ev_signal_start (EV_A_ &childev);
		1020	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1021	#endif
283	}	1022	}
		1023	else
		1024	ev_default_loop_ptr = 0;
		1025	}
		1026
		1027	return ev_default_loop_ptr;
		1028	}
		1029
		1030	void
		1031	ev_default_destroy (void)
		1032	{
		1033	#if EV_MULTIPLICITY
		1034	struct ev_loop *loop = ev_default_loop_ptr;
		1035	#endif
		1036
		1037	#ifndef _WIN32
		1038	ev_ref (EV_A); /* child watcher */
		1039	ev_signal_stop (EV_A_ &childev);
		1040	#endif
		1041
		1042	ev_ref (EV_A); /* signal watcher */
		1043	ev_io_stop (EV_A_ &sigev);
		1044
		1045	close (sigpipe [0]); sigpipe [0] = 0;
		1046	close (sigpipe [1]); sigpipe [1] = 0;
		1047
		1048	loop_destroy (EV_A);
		1049	}
		1050
		1051	void
		1052	ev_default_fork (void)
		1053	{
		1054	#if EV_MULTIPLICITY
		1055	struct ev_loop *loop = ev_default_loop_ptr;
		1056	#endif
		1057
		1058	if (backend)
		1059	postfork = 1;
		1060	}
		1061
		1062	/*****************************************************************************/
		1063
		1064	int inline_size
		1065	any_pending (EV_P)
		1066	{
		1067	int pri;
		1068
		1069	for (pri = NUMPRI; pri--; )
		1070	if (pendingcnt [pri])
		1071	return 1;
		1072
		1073	return 0;
		1074	}
		1075
		1076	void inline_speed
		1077	call_pending (EV_P)
		1078	{
		1079	int pri;
		1080
		1081	for (pri = NUMPRI; pri--; )
		1082	while (pendingcnt [pri])
		1083	{
		1084	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1085
		1086	if (expect_true (p->w))
		1087	{
		1088	assert (("non-pending watcher on pending list", p->w->pending));
		1089
		1090	p->w->pending = 0;
		1091	EV_CB_INVOKE (p->w, p->events);
		1092	}
284	}	1093	}
285
286	pendingcnt = 0;
287	}	1094	}
288		1095
289	static void	1096	void inline_size
290	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	1097	timers_reify (EV_P)
291	{	1098	{
292	while (timercnt && timers [0]->at <= now)	1099	while (timercnt && ((WT)timers [0])->at <= mn_now)
293	{	1100	{
294	struct ev_timer *w = timers [0];	1101	ev_timer *w = timers [0];
		1102
		1103	assert (("inactive timer on timer heap detected", ev_is_active (w)));
295		1104
296	/* first reschedule or stop timer */	1105	/* first reschedule or stop timer */
297	if (w->repeat)	1106	if (w->repeat)
298	{	1107	{
299	if (w->is_abs)	1108	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;	1109
301	else
302	w->at = now + w->repeat;	1110	((WT)w)->at += w->repeat;
		1111	if (((WT)w)->at < mn_now)
		1112	((WT)w)->at = mn_now;
303		1113
304	assert (w->at > now);
305
306	downheap (timers, timercnt, 0);	1114	downheap ((WT *)timers, timercnt, 0);
307	}	1115	}
308	else	1116	else
		1117	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1118
		1119	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1120	}
		1121	}
		1122
		1123	#if EV_PERIODIC_ENABLE
		1124	void inline_size
		1125	periodics_reify (EV_P)
		1126	{
		1127	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
		1128	{
		1129	ev_periodic *w = periodics [0];
		1130
		1131	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1132
		1133	/* first reschedule or stop timer */
		1134	if (w->reschedule_cb)
309	{	1135	{
310	evtimer_stop (w); /* nonrepeating: stop timer */	1136	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
311	--timercnt; /* maybe pass by reference instead? */	1137	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1138	downheap ((WT *)periodics, periodiccnt, 0);
312	}	1139	}
		1140	else if (w->interval)
		1141	{
		1142	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
		1143	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1144	downheap ((WT *)periodics, periodiccnt, 0);
		1145	}
		1146	else
		1147	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
313		1148
314	event ((struct ev_watcher *)w, EV_TIMEOUT);	1149	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
315	}	1150	}
316	}	1151	}
317		1152
318	static void	1153	static void noinline
319	time_update ()	1154	periodics_reschedule (EV_P)
320	{	1155	{
321	int i;	1156	int i;
		1157
		1158	/* adjust periodics after time jump */
		1159	for (i = 0; i < periodiccnt; ++i)
		1160	{
		1161	ev_periodic *w = periodics [i];
		1162
		1163	if (w->reschedule_cb)
		1164	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1165	else if (w->interval)
		1166	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1167	}
		1168
		1169	/* now rebuild the heap */
		1170	for (i = periodiccnt >> 1; i--; )
		1171	downheap ((WT *)periodics, periodiccnt, i);
		1172	}
		1173	#endif
		1174
		1175	int inline_size
		1176	time_update_monotonic (EV_P)
		1177	{
		1178	mn_now = get_clock ();
		1179
		1180	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1181	{
		1182	ev_rt_now = rtmn_diff + mn_now;
		1183	return 0;
		1184	}
		1185	else
		1186	{
		1187	now_floor = mn_now;
322	ev_now = ev_time ();	1188	ev_rt_now = ev_time ();
323		1189	return 1;
324	if (have_monotonic)
325	{	1190	}
326	ev_tstamp odiff = diff;	1191	}
327		1192
328	/* detecting time jumps is much more difficult */	1193	void inline_size
329	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1194	time_update (EV_P)
		1195	{
		1196	int i;
		1197
		1198	#if EV_USE_MONOTONIC
		1199	if (expect_true (have_monotonic))
		1200	{
		1201	if (time_update_monotonic (EV_A))
330	{	1202	{
331	now = get_clock ();	1203	ev_tstamp odiff = rtmn_diff;
		1204
		1205	/* loop a few times, before making important decisions.
		1206	* on the choice of "4": one iteration isn't enough,
		1207	* in case we get preempted during the calls to
		1208	* ev_time and get_clock. a second call is almost guarenteed
		1209	* to succeed in that case, though. and looping a few more times
		1210	* doesn't hurt either as we only do this on time-jumps or
		1211	* in the unlikely event of getting preempted here.
		1212	*/
		1213	for (i = 4; --i; )
		1214	{
332	diff = ev_now - now;	1215	rtmn_diff = ev_rt_now - mn_now;
333		1216
334	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1217	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
335	return; /* all is well */	1218	return; /* all is well */
336		1219
337	ev_now = ev_time ();	1220	ev_rt_now = ev_time ();
		1221	mn_now = get_clock ();
		1222	now_floor = mn_now;
		1223	}
		1224
		1225	# if EV_PERIODIC_ENABLE
		1226	periodics_reschedule (EV_A);
		1227	# endif
		1228	/* no timer adjustment, as the monotonic clock doesn't jump */
		1229	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
338	}	1230	}
		1231	}
		1232	else
		1233	#endif
		1234	{
		1235	ev_rt_now = ev_time ();
339		1236
340	/* time jump detected, reschedule atimers */	1237	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
341	for (i = 0; i < atimercnt; ++i)
342	{	1238	{
343	struct ev_timer *w = atimers [i];	1239	#if EV_PERIODIC_ENABLE
344	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1240	periodics_reschedule (EV_A);
		1241	#endif
		1242
		1243	/* adjust timers. this is easy, as the offset is the same for all */
		1244	for (i = 0; i < timercnt; ++i)
		1245	((WT)timers [i])->at += ev_rt_now - mn_now;
345	}	1246	}
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		1247
354	now = ev_now;	1248	mn_now = ev_rt_now;
355	}
356	}
357
358	int ev_loop_done;
359
360	void ev_loop (int flags)
361	{
362	double block;
363	ev_loop_done = flags & EVLOOP_ONESHOT;
364
365	do
366	{	1249	}
		1250	}
		1251
		1252	void
		1253	ev_ref (EV_P)
		1254	{
		1255	++activecnt;
		1256	}
		1257
		1258	void
		1259	ev_unref (EV_P)
		1260	{
		1261	--activecnt;
		1262	}
		1263
		1264	static int loop_done;
		1265
		1266	void
		1267	ev_loop (EV_P_ int flags)
		1268	{
		1269	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1270	? EVUNLOOP_ONE
		1271	: EVUNLOOP_CANCEL;
		1272
		1273	while (activecnt)
		1274	{
		1275	/* queue check watchers (and execute them) */
		1276	if (expect_false (preparecnt))
		1277	{
		1278	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1279	call_pending (EV_A);
		1280	}
		1281
		1282	/* we might have forked, so reify kernel state if necessary */
		1283	if (expect_false (postfork))
		1284	loop_fork (EV_A);
		1285
367	/* update fd-related kernel structures */	1286	/* update fd-related kernel structures */
368	fd_reify ();	1287	fd_reify (EV_A);
369		1288
370	/* calculate blocking time */	1289	/* calculate blocking time */
		1290	{
		1291	double block;
		1292
371	if (flags & EVLOOP_NONBLOCK)	1293	if (flags & EVLOOP_NONBLOCK || idlecnt)
372	block = 0.;	1294	block = 0.; /* do not block at all */
373	else	1295	else
374	{	1296	{
		1297	/* update time to cancel out callback processing overhead */
		1298	#if EV_USE_MONOTONIC
		1299	if (expect_true (have_monotonic))
		1300	time_update_monotonic (EV_A);
		1301	else
		1302	#endif
		1303	{
		1304	ev_rt_now = ev_time ();
		1305	mn_now = ev_rt_now;
		1306	}
		1307
375	block = MAX_BLOCKTIME;	1308	block = MAX_BLOCKTIME;
376		1309
377	if (rtimercnt)	1310	if (timercnt)
378	{	1311	{
379	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1312	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
380	if (block > to) block = to;	1313	if (block > to) block = to;
381	}	1314	}
382		1315
		1316	#if EV_PERIODIC_ENABLE
383	if (atimercnt)	1317	if (periodiccnt)
384	{	1318	{
385	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1319	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
386	if (block > to) block = to;	1320	if (block > to) block = to;
387	}	1321	}
		1322	#endif
388		1323
389	if (block < 0.) block = 0.;	1324	if (expect_false (block < 0.)) block = 0.;
390	}	1325	}
391		1326
392	method_poll (block);	1327	backend_poll (EV_A_ block);
		1328	}
393		1329
394	/* update ev_now, do magic */	1330	/* update ev_rt_now, do magic */
395	time_update ();	1331	time_update (EV_A);
396		1332
397	/* put pending timers into pendign queue and reschedule them */	1333	/* queue pending timers and reschedule them */
398	/* absolute timers first */	1334	timers_reify (EV_A); /* relative timers called last */
399	timers_reify (atimers, atimercnt, ev_now);	1335	#if EV_PERIODIC_ENABLE
400	/* relative timers second */	1336	periodics_reify (EV_A); /* absolute timers called first */
401	timers_reify (rtimers, rtimercnt, now);	1337	#endif
402		1338
		1339	/* queue idle watchers unless other events are pending */
		1340	if (idlecnt && !any_pending (EV_A))
		1341	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		1342
		1343	/* queue check watchers, to be executed first */
		1344	if (expect_false (checkcnt))
		1345	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1346
403	call_pending ();	1347	call_pending (EV_A);
404	}
405	while (!ev_loop_done);
406	}
407		1348
408	static void	1349	if (expect_false (loop_done))
409	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1350	break;
		1351	}
		1352
		1353	if (loop_done == EVUNLOOP_ONE)
		1354	loop_done = EVUNLOOP_CANCEL;
		1355	}
		1356
		1357	void
		1358	ev_unloop (EV_P_ int how)
		1359	{
		1360	loop_done = how;
		1361	}
		1362
		1363	/*****************************************************************************/
		1364
		1365	void inline_size
		1366	wlist_add (WL *head, WL elem)
410	{	1367	{
411	elem->next = *head;	1368	elem->next = *head;
412	*head = elem;	1369	*head = elem;
413	}	1370	}
414		1371
415	static void	1372	void inline_size
416	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1373	wlist_del (WL *head, WL elem)
417	{	1374	{
418	while (*head)	1375	while (*head)
419	{	1376	{
420	if (*head == elem)	1377	if (*head == elem)
421	{	1378	{
…		…
425		1382
426	head = &(*head)->next;	1383	head = &(*head)->next;
427	}	1384	}
428	}	1385	}
429		1386
		1387	void inline_speed
		1388	ev_clear_pending (EV_P_ W w)
		1389	{
		1390	if (w->pending)
		1391	{
		1392	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1393	w->pending = 0;
		1394	}
		1395	}
		1396
		1397	void inline_speed
		1398	ev_start (EV_P_ W w, int active)
		1399	{
		1400	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1401	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1402
		1403	w->active = active;
		1404	ev_ref (EV_A);
		1405	}
		1406
		1407	void inline_size
		1408	ev_stop (EV_P_ W w)
		1409	{
		1410	ev_unref (EV_A);
		1411	w->active = 0;
		1412	}
		1413
		1414	/*****************************************************************************/
		1415
		1416	void
		1417	ev_io_start (EV_P_ ev_io *w)
		1418	{
		1419	int fd = w->fd;
		1420
		1421	if (expect_false (ev_is_active (w)))
		1422	return;
		1423
		1424	assert (("ev_io_start called with negative fd", fd >= 0));
		1425
		1426	ev_start (EV_A_ (W)w, 1);
		1427	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1428	wlist_add ((WL *)&anfds[fd].head, (WL)w);
		1429
		1430	fd_change (EV_A_ fd);
		1431	}
		1432
		1433	void
		1434	ev_io_stop (EV_P_ ev_io *w)
		1435	{
		1436	ev_clear_pending (EV_A_ (W)w);
		1437	if (expect_false (!ev_is_active (w)))
		1438	return;
		1439
		1440	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1441
		1442	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
		1443	ev_stop (EV_A_ (W)w);
		1444
		1445	fd_change (EV_A_ w->fd);
		1446	}
		1447
		1448	void
		1449	ev_timer_start (EV_P_ ev_timer *w)
		1450	{
		1451	if (expect_false (ev_is_active (w)))
		1452	return;
		1453
		1454	((WT)w)->at += mn_now;
		1455
		1456	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1457
		1458	ev_start (EV_A_ (W)w, ++timercnt);
		1459	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
		1460	timers [timercnt - 1] = w;
		1461	upheap ((WT *)timers, timercnt - 1);
		1462
		1463	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1464	}
		1465
		1466	void
		1467	ev_timer_stop (EV_P_ ev_timer *w)
		1468	{
		1469	ev_clear_pending (EV_A_ (W)w);
		1470	if (expect_false (!ev_is_active (w)))
		1471	return;
		1472
		1473	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1474
		1475	if (expect_true (((W)w)->active < timercnt--))
		1476	{
		1477	timers [((W)w)->active - 1] = timers [timercnt];
		1478	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1479	}
		1480
		1481	((WT)w)->at -= mn_now;
		1482
		1483	ev_stop (EV_A_ (W)w);
		1484	}
		1485
		1486	void
		1487	ev_timer_again (EV_P_ ev_timer *w)
		1488	{
		1489	if (ev_is_active (w))
		1490	{
		1491	if (w->repeat)
		1492	{
		1493	((WT)w)->at = mn_now + w->repeat;
		1494	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1495	}
		1496	else
		1497	ev_timer_stop (EV_A_ w);
		1498	}
		1499	else if (w->repeat)
		1500	{
		1501	w->at = w->repeat;
		1502	ev_timer_start (EV_A_ w);
		1503	}
		1504	}
		1505
		1506	#if EV_PERIODIC_ENABLE
		1507	void
		1508	ev_periodic_start (EV_P_ ev_periodic *w)
		1509	{
		1510	if (expect_false (ev_is_active (w)))
		1511	return;
		1512
		1513	if (w->reschedule_cb)
		1514	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1515	else if (w->interval)
		1516	{
		1517	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1518	/* this formula differs from the one in periodic_reify because we do not always round up */
		1519	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1520	}
		1521
		1522	ev_start (EV_A_ (W)w, ++periodiccnt);
		1523	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
		1524	periodics [periodiccnt - 1] = w;
		1525	upheap ((WT *)periodics, periodiccnt - 1);
		1526
		1527	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1528	}
		1529
		1530	void
		1531	ev_periodic_stop (EV_P_ ev_periodic *w)
		1532	{
		1533	ev_clear_pending (EV_A_ (W)w);
		1534	if (expect_false (!ev_is_active (w)))
		1535	return;
		1536
		1537	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1538
		1539	if (expect_true (((W)w)->active < periodiccnt--))
		1540	{
		1541	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1542	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
		1543	}
		1544
		1545	ev_stop (EV_A_ (W)w);
		1546	}
		1547
		1548	void
		1549	ev_periodic_again (EV_P_ ev_periodic *w)
		1550	{
		1551	/* TODO: use adjustheap and recalculation */
		1552	ev_periodic_stop (EV_A_ w);
		1553	ev_periodic_start (EV_A_ w);
		1554	}
		1555	#endif
		1556
		1557	void
		1558	ev_idle_start (EV_P_ ev_idle *w)
		1559	{
		1560	if (expect_false (ev_is_active (w)))
		1561	return;
		1562
		1563	ev_start (EV_A_ (W)w, ++idlecnt);
		1564	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1565	idles [idlecnt - 1] = w;
		1566	}
		1567
		1568	void
		1569	ev_idle_stop (EV_P_ ev_idle *w)
		1570	{
		1571	ev_clear_pending (EV_A_ (W)w);
		1572	if (expect_false (!ev_is_active (w)))
		1573	return;
		1574
		1575	{
		1576	int active = ((W)w)->active;
		1577	idles [active - 1] = idles [--idlecnt];
		1578	((W)idles [active - 1])->active = active;
		1579	}
		1580
		1581	ev_stop (EV_A_ (W)w);
		1582	}
		1583
		1584	void
		1585	ev_prepare_start (EV_P_ ev_prepare *w)
		1586	{
		1587	if (expect_false (ev_is_active (w)))
		1588	return;
		1589
		1590	ev_start (EV_A_ (W)w, ++preparecnt);
		1591	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1592	prepares [preparecnt - 1] = w;
		1593	}
		1594
		1595	void
		1596	ev_prepare_stop (EV_P_ ev_prepare *w)
		1597	{
		1598	ev_clear_pending (EV_A_ (W)w);
		1599	if (expect_false (!ev_is_active (w)))
		1600	return;
		1601
		1602	{
		1603	int active = ((W)w)->active;
		1604	prepares [active - 1] = prepares [--preparecnt];
		1605	((W)prepares [active - 1])->active = active;
		1606	}
		1607
		1608	ev_stop (EV_A_ (W)w);
		1609	}
		1610
		1611	void
		1612	ev_check_start (EV_P_ ev_check *w)
		1613	{
		1614	if (expect_false (ev_is_active (w)))
		1615	return;
		1616
		1617	ev_start (EV_A_ (W)w, ++checkcnt);
		1618	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1619	checks [checkcnt - 1] = w;
		1620	}
		1621
		1622	void
		1623	ev_check_stop (EV_P_ ev_check *w)
		1624	{
		1625	ev_clear_pending (EV_A_ (W)w);
		1626	if (expect_false (!ev_is_active (w)))
		1627	return;
		1628
		1629	{
		1630	int active = ((W)w)->active;
		1631	checks [active - 1] = checks [--checkcnt];
		1632	((W)checks [active - 1])->active = active;
		1633	}
		1634
		1635	ev_stop (EV_A_ (W)w);
		1636	}
		1637
		1638	#ifndef SA_RESTART
		1639	# define SA_RESTART 0
		1640	#endif
		1641
		1642	void
		1643	ev_signal_start (EV_P_ ev_signal *w)
		1644	{
		1645	#if EV_MULTIPLICITY
		1646	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1647	#endif
		1648	if (expect_false (ev_is_active (w)))
		1649	return;
		1650
		1651	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1652
		1653	ev_start (EV_A_ (W)w, 1);
		1654	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1655	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
		1656
		1657	if (!((WL)w)->next)
		1658	{
		1659	#if _WIN32
		1660	signal (w->signum, sighandler);
		1661	#else
		1662	struct sigaction sa;
		1663	sa.sa_handler = sighandler;
		1664	sigfillset (&sa.sa_mask);
		1665	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1666	sigaction (w->signum, &sa, 0);
		1667	#endif
		1668	}
		1669	}
		1670
		1671	void
		1672	ev_signal_stop (EV_P_ ev_signal *w)
		1673	{
		1674	ev_clear_pending (EV_A_ (W)w);
		1675	if (expect_false (!ev_is_active (w)))
		1676	return;
		1677
		1678	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
		1679	ev_stop (EV_A_ (W)w);
		1680
		1681	if (!signals [w->signum - 1].head)
		1682	signal (w->signum, SIG_DFL);
		1683	}
		1684
		1685	void
		1686	ev_child_start (EV_P_ ev_child *w)
		1687	{
		1688	#if EV_MULTIPLICITY
		1689	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1690	#endif
		1691	if (expect_false (ev_is_active (w)))
		1692	return;
		1693
		1694	ev_start (EV_A_ (W)w, 1);
		1695	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1696	}
		1697
		1698	void
		1699	ev_child_stop (EV_P_ ev_child *w)
		1700	{
		1701	ev_clear_pending (EV_A_ (W)w);
		1702	if (expect_false (!ev_is_active (w)))
		1703	return;
		1704
		1705	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1706	ev_stop (EV_A_ (W)w);
		1707	}
		1708
		1709	#if EV_EMBED_ENABLE
		1710	void noinline
		1711	ev_embed_sweep (EV_P_ ev_embed *w)
		1712	{
		1713	ev_loop (w->loop, EVLOOP_NONBLOCK);
		1714	}
		1715
430	static void	1716	static void
431	ev_start (struct ev_watcher *w, int active)	1717	embed_cb (EV_P_ ev_io *io, int revents)
432	{	1718	{
433	w->pending = 0;	1719	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
434	w->active = active;	1720
		1721	if (ev_cb (w))
		1722	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		1723	else
		1724	ev_embed_sweep (loop, w);
		1725	}
		1726
		1727	void
		1728	ev_embed_start (EV_P_ ev_embed *w)
		1729	{
		1730	if (expect_false (ev_is_active (w)))
		1731	return;
		1732
		1733	{
		1734	struct ev_loop *loop = w->loop;
		1735	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		1736	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		1737	}
		1738
		1739	ev_set_priority (&w->io, ev_priority (w));
		1740	ev_io_start (EV_A_ &w->io);
		1741
		1742	ev_start (EV_A_ (W)w, 1);
		1743	}
		1744
		1745	void
		1746	ev_embed_stop (EV_P_ ev_embed *w)
		1747	{
		1748	ev_clear_pending (EV_A_ (W)w);
		1749	if (expect_false (!ev_is_active (w)))
		1750	return;
		1751
		1752	ev_io_stop (EV_A_ &w->io);
		1753
		1754	ev_stop (EV_A_ (W)w);
		1755	}
		1756	#endif
		1757
		1758	#if EV_STAT_ENABLE
		1759
		1760	# ifdef _WIN32
		1761	# define lstat(a,b) stat(a,b)
		1762	# endif
		1763
		1764	void
		1765	ev_stat_stat (EV_P_ ev_stat *w)
		1766	{
		1767	if (lstat (w->path, &w->attr) < 0)
		1768	w->attr.st_nlink = 0;
		1769	else if (!w->attr.st_nlink)
		1770	w->attr.st_nlink = 1;
435	}	1771	}
436		1772
437	static void	1773	static void
438	ev_stop (struct ev_watcher *w)	1774	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
439	{	1775	{
440	if (w->pending)	1776	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
441	pendings [w->pending - 1].w = 0;
442		1777
443	w->active = 0;	1778	/* we copy this here each the time so that */
444	/* nop */	1779	/* prev has the old value when the callback gets invoked */
445	}	1780	w->prev = w->attr;
		1781	ev_stat_stat (EV_A_ w);
446		1782
		1783	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
		1784	ev_feed_event (EV_A_ w, EV_STAT);
		1785	}
		1786
447	void	1787	void
448	evio_start (struct ev_io *w)	1788	ev_stat_start (EV_P_ ev_stat *w)
449	{	1789	{
450	if (ev_is_active (w))	1790	if (expect_false (ev_is_active (w)))
451	return;	1791	return;
452		1792
453	int fd = w->fd;	1793	/* since we use memcmp, we need to clear any padding data etc. */
		1794	memset (&w->prev, 0, sizeof (ev_statdata));
		1795	memset (&w->attr, 0, sizeof (ev_statdata));
454		1796
455	ev_start ((struct ev_watcher *)w, 1);	1797	ev_stat_stat (EV_A_ w);
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		1798
459	++fdchangecnt;	1799	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
460	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	1800	ev_set_priority (&w->timer, ev_priority (w));
461	fdchanges [fdchangecnt - 1] = fd;	1801	ev_timer_start (EV_A_ &w->timer);
462	}
463		1802
		1803	ev_start (EV_A_ (W)w, 1);
		1804	}
		1805
464	void	1806	void
465	evio_stop (struct ev_io *w)	1807	ev_stat_stop (EV_P_ ev_stat *w)
466	{	1808	{
		1809	ev_clear_pending (EV_A_ (W)w);
467	if (!ev_is_active (w))	1810	if (expect_false (!ev_is_active (w)))
468	return;	1811	return;
469		1812
470	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	1813	ev_timer_stop (EV_A_ &w->timer);
471	ev_stop ((struct ev_watcher *)w);
472		1814
473	++fdchangecnt;	1815	ev_stop (EV_A_ (W)w);
474	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
475	fdchanges [fdchangecnt - 1] = w->fd;
476	}	1816	}
477		1817	#endif
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
496	{
497	w->at += now;
498
499	ev_start ((struct ev_watcher *)w, ++rtimercnt);
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	{
517	atimers [w->active - 1] = atimers [atimercnt];
518	downheap (atimers, atimercnt, w->active - 1);
519	}
520	}
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	}
532
533	void
534	evsignal_start (struct ev_signal *w)
535	{
536	if (ev_is_active (w))
537	return;
538
539	ev_start ((struct ev_watcher *)w, 1);
540	array_needsize (signals, signalmax, w->signum, signals_init);
541	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);
542	}
543
544	void
545	evsignal_stop (struct ev_signal *w)
546	{
547	if (!ev_is_active (w))
548	return;
549
550	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);
551	ev_stop ((struct ev_watcher *)w);
552	}
553		1818
554	/*****************************************************************************/	1819	/*****************************************************************************/
555	#if 1	1820
		1821	struct ev_once
		1822	{
		1823	ev_io io;
		1824	ev_timer to;
		1825	void (*cb)(int revents, void *arg);
		1826	void *arg;
		1827	};
556		1828
557	static void	1829	static void
558	sin_cb (struct ev_io *w, int revents)	1830	once_cb (EV_P_ struct ev_once *once, int revents)
559	{	1831	{
560	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1832	void (*cb)(int revents, void *arg) = once->cb;
		1833	void *arg = once->arg;
		1834
		1835	ev_io_stop (EV_A_ &once->io);
		1836	ev_timer_stop (EV_A_ &once->to);
		1837	ev_free (once);
		1838
		1839	cb (revents, arg);
561	}	1840	}
562		1841
563	static void	1842	static void
		1843	once_cb_io (EV_P_ ev_io *w, int revents)
		1844	{
		1845	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1846	}
		1847
		1848	static void
564	ocb (struct ev_timer *w, int revents)	1849	once_cb_to (EV_P_ ev_timer *w, int revents)
565	{	1850	{
566	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1851	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
567	evtimer_stop (w);
568	evtimer_start (w);
569	}	1852	}
570		1853
571	int main (void)	1854	void
		1855	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
572	{	1856	{
573	struct ev_io sin;	1857	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
574		1858
575	ev_init (0);	1859	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	}	1860	{
594	#endif	1861	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;	1862	return;
604	}	1863	}
605		1864
606	#endif	1865	once->cb = cb;
		1866	once->arg = arg;
607		1867
		1868	ev_init (&once->io, once_cb_io);
		1869	if (fd >= 0)
		1870	{
		1871	ev_io_set (&once->io, fd, events);
		1872	ev_io_start (EV_A_ &once->io);
		1873	}
608		1874
		1875	ev_init (&once->to, once_cb_to);
		1876	if (timeout >= 0.)
		1877	{
		1878	ev_timer_set (&once->to, timeout, 0.);
		1879	ev_timer_start (EV_A_ &once->to);
		1880	}
		1881	}
609		1882
		1883	#ifdef __cplusplus
		1884	}
		1885	#endif
610		1886

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