[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.13 by root, Wed Oct 31 10:50:05 2007 UTC vs.
Revision 1.134 by root, Fri Nov 23 19:13:33 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>
3	#include <unistd.h>
4	#include <fcntl.h>	103	#include <fcntl.h>
5	#include <signal.h>	104	#include <stddef.h>
6		105
7	#include <stdio.h>	106	#include <stdio.h>
8		107
9	#include <assert.h>	108	#include <assert.h>
10	#include <errno.h>	109	#include <errno.h>
11	#include <sys/time.h>	110	#include <sys/types.h>
12	#include <time.h>	111	#include <time.h>
13		112
14	#define HAVE_EPOLL 1	113	#include <signal.h>
15		114
16	#ifndef HAVE_MONOTONIC	115	#ifndef _WIN32
17	# ifdef CLOCK_MONOTONIC	116	# include <unistd.h>
18	# define HAVE_MONOTONIC 1	117	# include <sys/time.h>
		118	# include <sys/wait.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
19	# endif	124	# endif
20	#endif	125	#endif
21		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
22	#ifndef HAVE_SELECT	137	#ifndef EV_USE_SELECT
23	# define HAVE_SELECT 1	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
24	#endif	146	# endif
		147	#endif
25		148
26	#ifndef HAVE_EPOLL	149	#ifndef EV_USE_EPOLL
27	# define HAVE_EPOLL 0	150	# define EV_USE_EPOLL 0
28	#endif	151	#endif
29		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
		163	#ifndef CLOCK_MONOTONIC
		164	# undef EV_USE_MONOTONIC
		165	# define EV_USE_MONOTONIC 0
		166	#endif
		167
30	#ifndef HAVE_REALTIME	168	#ifndef CLOCK_REALTIME
31	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	169	# undef EV_USE_REALTIME
		170	# define EV_USE_REALTIME 0
32	#endif	171	#endif
		172
		173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
		175	#endif
		176
		177	/**/
33		178
34	#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) */
35	#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 */
36		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
37	#include "ev.h"	187	# include "ev.h"
		188	#endif
		189
		190	#if __GNUC__ >= 3
		191	# define expect(expr,value) __builtin_expect ((expr),(value))
		192	# define inline static inline
		193	#else
		194	# define expect(expr,value) (expr)
		195	# define inline static
		196	#endif
		197
		198	#define expect_false(expr) expect ((expr) != 0, 0)
		199	#define expect_true(expr) expect ((expr) != 0, 1)
		200
		201	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		202	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		203
		204	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		205	#define EMPTY2(a,b) /* used to suppress some warnings */
38		206
39	typedef struct ev_watcher *W;	207	typedef struct ev_watcher *W;
40	typedef struct ev_watcher_list *WL;	208	typedef struct ev_watcher_list *WL;
41	typedef struct ev_watcher_time *WT;	209	typedef struct ev_watcher_time *WT;
42		210
43	static ev_tstamp now, diff; /* monotonic clock */	211	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		212
		213	#ifdef _WIN32
		214	# include "ev_win32.c"
		215	#endif
		216
		217	/*****************************************************************************/
		218
		219	static void (syserr_cb)(const char msg);
		220
		221	void ev_set_syserr_cb (void (cb)(const char msg))
		222	{
		223	syserr_cb = cb;
		224	}
		225
		226	static void
		227	syserr (const char *msg)
		228	{
		229	if (!msg)
		230	msg = "(libev) system error";
		231
		232	if (syserr_cb)
		233	syserr_cb (msg);
		234	else
		235	{
		236	perror (msg);
		237	abort ();
		238	}
		239	}
		240
		241	static void (alloc)(void *ptr, long size);
		242
		243	void ev_set_allocator (void (cb)(void *ptr, long size))
		244	{
		245	alloc = cb;
		246	}
		247
		248	static void *
		249	ev_realloc (void *ptr, long size)
		250	{
		251	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		252
		253	if (!ptr && size)
		254	{
		255	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		256	abort ();
		257	}
		258
		259	return ptr;
		260	}
		261
		262	#define ev_malloc(size) ev_realloc (0, (size))
		263	#define ev_free(ptr) ev_realloc ((ptr), 0)
		264
		265	/*****************************************************************************/
		266
		267	typedef struct
		268	{
		269	WL head;
		270	unsigned char events;
		271	unsigned char reify;
		272	#if EV_SELECT_IS_WINSOCKET
		273	SOCKET handle;
		274	#endif
		275	} ANFD;
		276
		277	typedef struct
		278	{
		279	W w;
		280	int events;
		281	} ANPENDING;
		282
		283	#if EV_MULTIPLICITY
		284
		285	struct ev_loop
		286	{
		287	ev_tstamp ev_rt_now;
		288	#define ev_rt_now ((loop)->ev_rt_now)
		289	#define VAR(name,decl) decl;
		290	#include "ev_vars.h"
		291	#undef VAR
		292	};
		293	#include "ev_wrap.h"
		294
		295	static struct ev_loop default_loop_struct;
		296	struct ev_loop *ev_default_loop_ptr;
		297
		298	#else
		299
44	ev_tstamp ev_now;	300	ev_tstamp ev_rt_now;
45	int ev_method;	301	#define VAR(name,decl) static decl;
		302	#include "ev_vars.h"
		303	#undef VAR
46		304
47	static int have_monotonic; /* runtime */	305	static int ev_default_loop_ptr;
48		306
49	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	307	#endif
50	static void (*method_modify)(int fd, int oev, int nev);
51	static void (*method_poll)(ev_tstamp timeout);
52		308
53	/*****************************************************************************/	309	/*****************************************************************************/
54		310
55	ev_tstamp	311	ev_tstamp
56	ev_time (void)	312	ev_time (void)
57	{	313	{
58	#if HAVE_REALTIME	314	#if EV_USE_REALTIME
59	struct timespec ts;	315	struct timespec ts;
60	clock_gettime (CLOCK_REALTIME, &ts);	316	clock_gettime (CLOCK_REALTIME, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	317	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	#else	318	#else
63	struct timeval tv;	319	struct timeval tv;
64	gettimeofday (&tv, 0);	320	gettimeofday (&tv, 0);
65	return tv.tv_sec + tv.tv_usec * 1e-6;	321	return tv.tv_sec + tv.tv_usec * 1e-6;
66	#endif	322	#endif
67	}	323	}
68		324
69	static ev_tstamp	325	inline ev_tstamp
70	get_clock (void)	326	get_clock (void)
71	{	327	{
72	#if HAVE_MONOTONIC	328	#if EV_USE_MONOTONIC
73	if (have_monotonic)	329	if (expect_true (have_monotonic))
74	{	330	{
75	struct timespec ts;	331	struct timespec ts;
76	clock_gettime (CLOCK_MONOTONIC, &ts);	332	clock_gettime (CLOCK_MONOTONIC, &ts);
77	return ts.tv_sec + ts.tv_nsec * 1e-9;	333	return ts.tv_sec + ts.tv_nsec * 1e-9;
78	}	334	}
79	#endif	335	#endif
80		336
81	return ev_time ();	337	return ev_time ();
82	}	338	}
83		339
		340	#if EV_MULTIPLICITY
		341	ev_tstamp
		342	ev_now (EV_P)
		343	{
		344	return ev_rt_now;
		345	}
		346	#endif
		347
		348	#define array_roundsize(type,n) (((n) \| 4) & ~3)
		349
84	#define array_needsize(base,cur,cnt,init) \	350	#define array_needsize(type,base,cur,cnt,init) \
85	if ((cnt) > cur) \	351	if (expect_false ((cnt) > cur)) \
86	{ \	352	{ \
87	int newcnt = cur ? cur << 1 : 16; \	353	int newcnt = cur; \
88	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	354	do \
		355	{ \
		356	newcnt = array_roundsize (type, newcnt << 1); \
		357	} \
		358	while ((cnt) > newcnt); \
		359	\
89	base = realloc (base, sizeof (base) (newcnt)); \	360	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
90	init (base + cur, newcnt - cur); \	361	init (base + cur, newcnt - cur); \
91	cur = newcnt; \	362	cur = newcnt; \
92	}	363	}
		364
		365	#define array_slim(type,stem) \
		366	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		367	{ \
		368	stem ## max = array_roundsize (stem ## cnt >> 1); \
		369	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
		370	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		371	}
		372
		373	#define array_free(stem, idx) \
		374	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
93		375
94	/*****************************************************************************/	376	/*****************************************************************************/
95		377
96	typedef struct
97	{
98	struct ev_io *head;
99	unsigned char wev, rev; /* want, received event set */
100	} ANFD;
101
102	static ANFD *anfds;
103	static int anfdmax;
104
105	static int *fdchanges;
106	static int fdchangemax, fdchangecnt;
107
108	static void	378	static void
109	anfds_init (ANFD *base, int count)	379	anfds_init (ANFD *base, int count)
110	{	380	{
111	while (count--)	381	while (count--)
112	{	382	{
113	base->head = 0;	383	base->head = 0;
114	base->wev = base->rev = EV_NONE;	384	base->events = EV_NONE;
		385	base->reify = 0;
		386
115	++base;	387	++base;
116	}	388	}
117	}	389	}
118		390
119	typedef struct	391	void
		392	ev_feed_event (EV_P_ void *w, int revents)
120	{	393	{
121	W w;	394	W w_ = (W)w;
122	int events;
123	} ANPENDING;
124		395
125	static ANPENDING *pendings;	396	if (expect_false (w_->pending))
126	static int pendingmax, pendingcnt;	397	{
		398	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		399	return;
		400	}
127		401
128	static void	402	if (expect_false (!w_->cb))
129	event (W w, int events)	403	return;
130	{	404
131	w->pending = ++pendingcnt;	405	w_->pending = ++pendingcnt [ABSPRI (w_)];
132	array_needsize (pendings, pendingmax, pendingcnt, );	406	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
133	pendings [pendingcnt - 1].w = w;	407	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
134	pendings [pendingcnt - 1].events = events;	408	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
135	}	409	}
136		410
137	static void	411	static void
		412	queue_events (EV_P_ W *events, int eventcnt, int type)
		413	{
		414	int i;
		415
		416	for (i = 0; i < eventcnt; ++i)
		417	ev_feed_event (EV_A_ events [i], type);
		418	}
		419
		420	inline void
138	fd_event (int fd, int events)	421	fd_event (EV_P_ int fd, int revents)
139	{	422	{
140	ANFD *anfd = anfds + fd;	423	ANFD *anfd = anfds + fd;
141	struct ev_io *w;	424	struct ev_io *w;
142		425
143	for (w = anfd->head; w; w = w->next)	426	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
144	{	427	{
145	int ev = w->events & events;	428	int ev = w->events & revents;
146		429
147	if (ev)	430	if (ev)
148	event ((W)w, ev);	431	ev_feed_event (EV_A_ (W)w, ev);
149	}	432	}
150	}	433	}
151		434
152	static void	435	void
153	queue_events (W *events, int eventcnt, int type)	436	ev_feed_fd_event (EV_P_ int fd, int revents)
154	{	437	{
155	int i;	438	fd_event (EV_A_ fd, revents);
156
157	for (i = 0; i < eventcnt; ++i)
158	event (events [i], type);
159	}	439	}
160		440
161	/*****************************************************************************/	441	/*****************************************************************************/
162		442
163	static struct ev_timer **timers;	443	inline void
164	static int timermax, timercnt;	444	fd_reify (EV_P)
165
166	static struct ev_periodic **periodics;
167	static int periodicmax, periodiccnt;
168
169	static void
170	upheap (WT *timers, int k)
171	{
172	WT w = timers [k];
173
174	while (k && timers [k >> 1]->at > w->at)
175	{
176	timers [k] = timers [k >> 1];
177	timers [k]->active = k + 1;
178	k >>= 1;
179	}
180
181	timers [k] = w;
182	timers [k]->active = k + 1;
183
184	}
185
186	static void
187	downheap (WT *timers, int N, int k)
188	{
189	WT w = timers [k];
190
191	while (k < (N >> 1))
192	{
193	int j = k << 1;
194
195	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
196	++j;
197
198	if (w->at <= timers [j]->at)
199	break;
200
201	timers [k] = timers [j];
202	timers [k]->active = k + 1;
203	k = j;
204	}
205
206	timers [k] = w;
207	timers [k]->active = k + 1;
208	}
209
210	/*****************************************************************************/
211
212	typedef struct
213	{
214	struct ev_signal *head;
215	sig_atomic_t gotsig;
216	} ANSIG;
217
218	static ANSIG *signals;
219	static int signalmax;
220
221	static int sigpipe [2];
222	static sig_atomic_t gotsig;
223	static struct ev_io sigev;
224
225	static void
226	signals_init (ANSIG *base, int count)
227	{
228	while (count--)
229	{
230	base->head = 0;
231	base->gotsig = 0;
232	++base;
233	}
234	}
235
236	static void
237	sighandler (int signum)
238	{
239	signals [signum - 1].gotsig = 1;
240
241	if (!gotsig)
242	{
243	gotsig = 1;
244	write (sigpipe [1], &gotsig, 1);
245	}
246	}
247
248	static void
249	sigcb (struct ev_io *iow, int revents)
250	{
251	struct ev_signal *w;
252	int sig;
253
254	gotsig = 0;
255	read (sigpipe [0], &revents, 1);
256
257	for (sig = signalmax; sig--; )
258	if (signals [sig].gotsig)
259	{
260	signals [sig].gotsig = 0;
261
262	for (w = signals [sig].head; w; w = w->next)
263	event ((W)w, EV_SIGNAL);
264	}
265	}
266
267	static void
268	siginit (void)
269	{
270	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
271	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
272
273	/* rather than sort out wether we really need nb, set it */
274	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
275	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
276
277	evio_set (&sigev, sigpipe [0], EV_READ);
278	evio_start (&sigev);
279	}
280
281	/*****************************************************************************/
282
283	static struct ev_idle **idles;
284	static int idlemax, idlecnt;
285
286	static struct ev_check **checks;
287	static int checkmax, checkcnt;
288
289	/*****************************************************************************/
290
291	#if HAVE_EPOLL
292	# include "ev_epoll.c"
293	#endif
294	#if HAVE_SELECT
295	# include "ev_select.c"
296	#endif
297
298	int ev_init (int flags)
299	{
300	#if HAVE_MONOTONIC
301	{
302	struct timespec ts;
303	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
304	have_monotonic = 1;
305	}
306	#endif
307
308	ev_now = ev_time ();
309	now = get_clock ();
310	diff = ev_now - now;
311
312	if (pipe (sigpipe))
313	return 0;
314
315	ev_method = EVMETHOD_NONE;
316	#if HAVE_EPOLL
317	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
318	#endif
319	#if HAVE_SELECT
320	if (ev_method == EVMETHOD_NONE) select_init (flags);
321	#endif
322
323	if (ev_method)
324	{
325	evw_init (&sigev, sigcb);
326	siginit ();
327	}
328
329	return ev_method;
330	}
331
332	/*****************************************************************************/
333
334	void ev_prefork (void)
335	{
336	/* nop */
337	}
338
339	void ev_postfork_parent (void)
340	{
341	/* nop */
342	}
343
344	void ev_postfork_child (void)
345	{
346	#if HAVE_EPOLL
347	if (ev_method == EVMETHOD_EPOLL)
348	epoll_postfork_child ();
349	#endif
350
351	evio_stop (&sigev);
352	close (sigpipe [0]);
353	close (sigpipe [1]);
354	pipe (sigpipe);
355	siginit ();
356	}
357
358	/*****************************************************************************/
359
360	static void
361	fd_reify (void)
362	{	445	{
363	int i;	446	int i;
364		447
365	for (i = 0; i < fdchangecnt; ++i)	448	for (i = 0; i < fdchangecnt; ++i)
366	{	449	{
367	int fd = fdchanges [i];	450	int fd = fdchanges [i];
368	ANFD *anfd = anfds + fd;	451	ANFD *anfd = anfds + fd;
369	struct ev_io *w;	452	struct ev_io *w;
370		453
371	int wev = 0;	454	int events = 0;
372		455
373	for (w = anfd->head; w; w = w->next)	456	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
374	wev \|= w->events;	457	events \|= w->events;
375		458
376	if (anfd->wev != wev)	459	#if EV_SELECT_IS_WINSOCKET
		460	if (events)
377	{	461	{
378	method_modify (fd, anfd->wev, wev);	462	unsigned long argp;
379	anfd->wev = wev;	463	anfd->handle = _get_osfhandle (fd);
		464	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
380	}	465	}
		466	#endif
		467
		468	anfd->reify = 0;
		469
		470	backend_modify (EV_A_ fd, anfd->events, events);
		471	anfd->events = events;
381	}	472	}
382		473
383	fdchangecnt = 0;	474	fdchangecnt = 0;
384	}	475	}
385		476
386	static void	477	static void
387	call_pending ()	478	fd_change (EV_P_ int fd)
		479	{
		480	if (expect_false (anfds [fd].reify))
		481	return;
		482
		483	anfds [fd].reify = 1;
		484
		485	++fdchangecnt;
		486	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		487	fdchanges [fdchangecnt - 1] = fd;
		488	}
		489
		490	static void
		491	fd_kill (EV_P_ int fd)
		492	{
		493	struct ev_io *w;
		494
		495	while ((w = (struct ev_io *)anfds [fd].head))
		496	{
		497	ev_io_stop (EV_A_ w);
		498	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		499	}
		500	}
		501
		502	inline int
		503	fd_valid (int fd)
		504	{
		505	#ifdef _WIN32
		506	return _get_osfhandle (fd) != -1;
		507	#else
		508	return fcntl (fd, F_GETFD) != -1;
		509	#endif
		510	}
		511
		512	/* called on EBADF to verify fds */
		513	static void
		514	fd_ebadf (EV_P)
		515	{
		516	int fd;
		517
		518	for (fd = 0; fd < anfdmax; ++fd)
		519	if (anfds [fd].events)
		520	if (!fd_valid (fd) == -1 && errno == EBADF)
		521	fd_kill (EV_A_ fd);
		522	}
		523
		524	/* called on ENOMEM in select/poll to kill some fds and retry */
		525	static void
		526	fd_enomem (EV_P)
		527	{
		528	int fd;
		529
		530	for (fd = anfdmax; fd--; )
		531	if (anfds [fd].events)
		532	{
		533	fd_kill (EV_A_ fd);
		534	return;
		535	}
		536	}
		537
		538	/* usually called after fork if backend needs to re-arm all fds from scratch */
		539	static void
		540	fd_rearm_all (EV_P)
		541	{
		542	int fd;
		543
		544	/* this should be highly optimised to not do anything but set a flag */
		545	for (fd = 0; fd < anfdmax; ++fd)
		546	if (anfds [fd].events)
		547	{
		548	anfds [fd].events = 0;
		549	fd_change (EV_A_ fd);
		550	}
		551	}
		552
		553	/*****************************************************************************/
		554
		555	static void
		556	upheap (WT *heap, int k)
		557	{
		558	WT w = heap [k];
		559
		560	while (k && heap [k >> 1]->at > w->at)
		561	{
		562	heap [k] = heap [k >> 1];
		563	((W)heap [k])->active = k + 1;
		564	k >>= 1;
		565	}
		566
		567	heap [k] = w;
		568	((W)heap [k])->active = k + 1;
		569
		570	}
		571
		572	static void
		573	downheap (WT *heap, int N, int k)
		574	{
		575	WT w = heap [k];
		576
		577	while (k < (N >> 1))
		578	{
		579	int j = k << 1;
		580
		581	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		582	++j;
		583
		584	if (w->at <= heap [j]->at)
		585	break;
		586
		587	heap [k] = heap [j];
		588	((W)heap [k])->active = k + 1;
		589	k = j;
		590	}
		591
		592	heap [k] = w;
		593	((W)heap [k])->active = k + 1;
		594	}
		595
		596	inline void
		597	adjustheap (WT *heap, int N, int k)
		598	{
		599	upheap (heap, k);
		600	downheap (heap, N, k);
		601	}
		602
		603	/*****************************************************************************/
		604
		605	typedef struct
		606	{
		607	WL head;
		608	sig_atomic_t volatile gotsig;
		609	} ANSIG;
		610
		611	static ANSIG *signals;
		612	static int signalmax;
		613
		614	static int sigpipe [2];
		615	static sig_atomic_t volatile gotsig;
		616	static struct ev_io sigev;
		617
		618	static void
		619	signals_init (ANSIG *base, int count)
		620	{
		621	while (count--)
		622	{
		623	base->head = 0;
		624	base->gotsig = 0;
		625
		626	++base;
		627	}
		628	}
		629
		630	static void
		631	sighandler (int signum)
		632	{
		633	#if _WIN32
		634	signal (signum, sighandler);
		635	#endif
		636
		637	signals [signum - 1].gotsig = 1;
		638
		639	if (!gotsig)
		640	{
		641	int old_errno = errno;
		642	gotsig = 1;
		643	write (sigpipe [1], &signum, 1);
		644	errno = old_errno;
		645	}
		646	}
		647
		648	void
		649	ev_feed_signal_event (EV_P_ int signum)
		650	{
		651	WL w;
		652
		653	#if EV_MULTIPLICITY
		654	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		655	#endif
		656
		657	--signum;
		658
		659	if (signum < 0 \|\| signum >= signalmax)
		660	return;
		661
		662	signals [signum].gotsig = 0;
		663
		664	for (w = signals [signum].head; w; w = w->next)
		665	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		666	}
		667
		668	static void
		669	sigcb (EV_P_ struct ev_io *iow, int revents)
		670	{
		671	int signum;
		672
		673	read (sigpipe [0], &revents, 1);
		674	gotsig = 0;
		675
		676	for (signum = signalmax; signum--; )
		677	if (signals [signum].gotsig)
		678	ev_feed_signal_event (EV_A_ signum + 1);
		679	}
		680
		681	static void
		682	fd_intern (int fd)
		683	{
		684	#ifdef _WIN32
		685	int arg = 1;
		686	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		687	#else
		688	fcntl (fd, F_SETFD, FD_CLOEXEC);
		689	fcntl (fd, F_SETFL, O_NONBLOCK);
		690	#endif
		691	}
		692
		693	static void
		694	siginit (EV_P)
		695	{
		696	fd_intern (sigpipe [0]);
		697	fd_intern (sigpipe [1]);
		698
		699	ev_io_set (&sigev, sigpipe [0], EV_READ);
		700	ev_io_start (EV_A_ &sigev);
		701	ev_unref (EV_A); /* child watcher should not keep loop alive */
		702	}
		703
		704	/*****************************************************************************/
		705
		706	static struct ev_child *childs [PID_HASHSIZE];
		707
		708	#ifndef _WIN32
		709
		710	static struct ev_signal childev;
		711
		712	#ifndef WCONTINUED
		713	# define WCONTINUED 0
		714	#endif
		715
		716	static void
		717	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		718	{
		719	struct ev_child *w;
		720
		721	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		722	if (w->pid == pid \|\| !w->pid)
		723	{
		724	ev_priority (w) = ev_priority (sw); /* need to do it now */
		725	w->rpid = pid;
		726	w->rstatus = status;
		727	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		728	}
		729	}
		730
		731	static void
		732	childcb (EV_P_ struct ev_signal *sw, int revents)
		733	{
		734	int pid, status;
		735
		736	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		737	{
		738	/* make sure we are called again until all childs have been reaped */
		739	/* we need to do it this way so that the callback gets called before we continue */
		740	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		741
		742	child_reap (EV_A_ sw, pid, pid, status);
		743	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		744	}
		745	}
		746
		747	#endif
		748
		749	/*****************************************************************************/
		750
		751	#if EV_USE_PORT
		752	# include "ev_port.c"
		753	#endif
		754	#if EV_USE_KQUEUE
		755	# include "ev_kqueue.c"
		756	#endif
		757	#if EV_USE_EPOLL
		758	# include "ev_epoll.c"
		759	#endif
		760	#if EV_USE_POLL
		761	# include "ev_poll.c"
		762	#endif
		763	#if EV_USE_SELECT
		764	# include "ev_select.c"
		765	#endif
		766
		767	int
		768	ev_version_major (void)
		769	{
		770	return EV_VERSION_MAJOR;
		771	}
		772
		773	int
		774	ev_version_minor (void)
		775	{
		776	return EV_VERSION_MINOR;
		777	}
		778
		779	/* return true if we are running with elevated privileges and should ignore env variables */
		780	static int
		781	enable_secure (void)
		782	{
		783	#ifdef _WIN32
		784	return 0;
		785	#else
		786	return getuid () != geteuid ()
		787	\|\| getgid () != getegid ();
		788	#endif
		789	}
		790
		791	unsigned int
		792	ev_supported_backends (void)
		793	{
		794	unsigned int flags = 0;
		795
		796	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
		797	if (EV_USE_KQUEUE) flags \|= EVBACKEND_KQUEUE;
		798	if (EV_USE_EPOLL ) flags \|= EVBACKEND_EPOLL;
		799	if (EV_USE_POLL ) flags \|= EVBACKEND_POLL;
		800	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
		801
		802	return flags;
		803	}
		804
		805	unsigned int
		806	ev_recommended_backends (void)
		807	{
		808	unsigned int flags = ev_supported_backends ();
		809
		810	#ifndef __NetBSD__
		811	/* kqueue is borked on everything but netbsd apparently */
		812	/* it usually doesn't work correctly on anything but sockets and pipes */
		813	flags &= ~EVBACKEND_KQUEUE;
		814	#endif
		815	#ifdef __APPLE__
		816	// flags &= ~EVBACKEND_KQUEUE; for documentation
		817	flags &= ~EVBACKEND_POLL;
		818	#endif
		819
		820	return flags;
		821	}
		822
		823	unsigned int
		824	ev_embeddable_backends (void)
		825	{
		826	return EVBACKEND_EPOLL
		827	\| EVBACKEND_KQUEUE
		828	\| EVBACKEND_PORT;
		829	}
		830
		831	unsigned int
		832	ev_backend (EV_P)
		833	{
		834	return backend;
		835	}
		836
		837	static void
		838	loop_init (EV_P_ unsigned int flags)
		839	{
		840	if (!backend)
		841	{
		842	#if EV_USE_MONOTONIC
		843	{
		844	struct timespec ts;
		845	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		846	have_monotonic = 1;
		847	}
		848	#endif
		849
		850	ev_rt_now = ev_time ();
		851	mn_now = get_clock ();
		852	now_floor = mn_now;
		853	rtmn_diff = ev_rt_now - mn_now;
		854
		855	if (!(flags & EVFLAG_NOENV)
		856	&& !enable_secure ()
		857	&& getenv ("LIBEV_FLAGS"))
		858	flags = atoi (getenv ("LIBEV_FLAGS"));
		859
		860	if (!(flags & 0x0000ffffUL))
		861	flags \|= ev_recommended_backends ();
		862
		863	backend = 0;
		864	#if EV_USE_PORT
		865	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		866	#endif
		867	#if EV_USE_KQUEUE
		868	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		869	#endif
		870	#if EV_USE_EPOLL
		871	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		872	#endif
		873	#if EV_USE_POLL
		874	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		875	#endif
		876	#if EV_USE_SELECT
		877	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		878	#endif
		879
		880	ev_init (&sigev, sigcb);
		881	ev_set_priority (&sigev, EV_MAXPRI);
		882	}
		883	}
		884
		885	static void
		886	loop_destroy (EV_P)
388	{	887	{
389	int i;	888	int i;
390		889
391	for (i = 0; i < pendingcnt; ++i)	890	#if EV_USE_PORT
		891	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		892	#endif
		893	#if EV_USE_KQUEUE
		894	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		895	#endif
		896	#if EV_USE_EPOLL
		897	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		898	#endif
		899	#if EV_USE_POLL
		900	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		901	#endif
		902	#if EV_USE_SELECT
		903	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		904	#endif
		905
		906	for (i = NUMPRI; i--; )
		907	array_free (pending, [i]);
		908
		909	/* have to use the microsoft-never-gets-it-right macro */
		910	array_free (fdchange, EMPTY0);
		911	array_free (timer, EMPTY0);
		912	#if EV_PERIODICS
		913	array_free (periodic, EMPTY0);
		914	#endif
		915	array_free (idle, EMPTY0);
		916	array_free (prepare, EMPTY0);
		917	array_free (check, EMPTY0);
		918
		919	backend = 0;
		920	}
		921
		922	static void
		923	loop_fork (EV_P)
		924	{
		925	#if EV_USE_PORT
		926	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		927	#endif
		928	#if EV_USE_KQUEUE
		929	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		930	#endif
		931	#if EV_USE_EPOLL
		932	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		933	#endif
		934
		935	if (ev_is_active (&sigev))
		936	{
		937	/* default loop */
		938
		939	ev_ref (EV_A);
		940	ev_io_stop (EV_A_ &sigev);
		941	close (sigpipe [0]);
		942	close (sigpipe [1]);
		943
		944	while (pipe (sigpipe))
		945	syserr ("(libev) error creating pipe");
		946
		947	siginit (EV_A);
392	{	948	}
393	ANPENDING *p = pendings + i;
394		949
395	if (p->w)	950	postfork = 0;
		951	}
		952
		953	#if EV_MULTIPLICITY
		954	struct ev_loop *
		955	ev_loop_new (unsigned int flags)
		956	{
		957	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		958
		959	memset (loop, 0, sizeof (struct ev_loop));
		960
		961	loop_init (EV_A_ flags);
		962
		963	if (ev_backend (EV_A))
		964	return loop;
		965
		966	return 0;
		967	}
		968
		969	void
		970	ev_loop_destroy (EV_P)
		971	{
		972	loop_destroy (EV_A);
		973	ev_free (loop);
		974	}
		975
		976	void
		977	ev_loop_fork (EV_P)
		978	{
		979	postfork = 1;
		980	}
		981
		982	#endif
		983
		984	#if EV_MULTIPLICITY
		985	struct ev_loop *
		986	ev_default_loop_init (unsigned int flags)
		987	#else
		988	int
		989	ev_default_loop (unsigned int flags)
		990	#endif
		991	{
		992	if (sigpipe [0] == sigpipe [1])
		993	if (pipe (sigpipe))
		994	return 0;
		995
		996	if (!ev_default_loop_ptr)
		997	{
		998	#if EV_MULTIPLICITY
		999	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1000	#else
		1001	ev_default_loop_ptr = 1;
		1002	#endif
		1003
		1004	loop_init (EV_A_ flags);
		1005
		1006	if (ev_backend (EV_A))
396	{	1007	{
397	p->w->pending = 0;	1008	siginit (EV_A);
398	p->w->cb (p->w, p->events);	1009
		1010	#ifndef _WIN32
		1011	ev_signal_init (&childev, childcb, SIGCHLD);
		1012	ev_set_priority (&childev, EV_MAXPRI);
		1013	ev_signal_start (EV_A_ &childev);
		1014	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1015	#endif
399	}	1016	}
		1017	else
		1018	ev_default_loop_ptr = 0;
		1019	}
		1020
		1021	return ev_default_loop_ptr;
		1022	}
		1023
		1024	void
		1025	ev_default_destroy (void)
		1026	{
		1027	#if EV_MULTIPLICITY
		1028	struct ev_loop *loop = ev_default_loop_ptr;
		1029	#endif
		1030
		1031	#ifndef _WIN32
		1032	ev_ref (EV_A); /* child watcher */
		1033	ev_signal_stop (EV_A_ &childev);
		1034	#endif
		1035
		1036	ev_ref (EV_A); /* signal watcher */
		1037	ev_io_stop (EV_A_ &sigev);
		1038
		1039	close (sigpipe [0]); sigpipe [0] = 0;
		1040	close (sigpipe [1]); sigpipe [1] = 0;
		1041
		1042	loop_destroy (EV_A);
		1043	}
		1044
		1045	void
		1046	ev_default_fork (void)
		1047	{
		1048	#if EV_MULTIPLICITY
		1049	struct ev_loop *loop = ev_default_loop_ptr;
		1050	#endif
		1051
		1052	if (backend)
		1053	postfork = 1;
		1054	}
		1055
		1056	/*****************************************************************************/
		1057
		1058	static int
		1059	any_pending (EV_P)
		1060	{
		1061	int pri;
		1062
		1063	for (pri = NUMPRI; pri--; )
		1064	if (pendingcnt [pri])
		1065	return 1;
		1066
		1067	return 0;
		1068	}
		1069
		1070	inline void
		1071	call_pending (EV_P)
		1072	{
		1073	int pri;
		1074
		1075	for (pri = NUMPRI; pri--; )
		1076	while (pendingcnt [pri])
		1077	{
		1078	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1079
		1080	if (expect_true (p->w))
		1081	{
		1082	p->w->pending = 0;
		1083	EV_CB_INVOKE (p->w, p->events);
		1084	}
400	}	1085	}
401
402	pendingcnt = 0;
403	}	1086	}
404		1087
405	static void	1088	inline void
406	timers_reify ()	1089	timers_reify (EV_P)
407	{	1090	{
408	while (timercnt && timers [0]->at <= now)	1091	while (timercnt && ((WT)timers [0])->at <= mn_now)
409	{	1092	{
410	struct ev_timer *w = timers [0];	1093	struct ev_timer *w = timers [0];
		1094
		1095	assert (("inactive timer on timer heap detected", ev_is_active (w)));
411		1096
412	/* first reschedule or stop timer */	1097	/* first reschedule or stop timer */
413	if (w->repeat)	1098	if (w->repeat)
414	{	1099	{
		1100	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1101
415	w->at = now + w->repeat;	1102	((WT)w)->at += w->repeat;
416	assert (("timer timeout in the past, negative repeat?", w->at > now));	1103	if (((WT)w)->at < mn_now)
		1104	((WT)w)->at = mn_now;
		1105
417	downheap ((WT *)timers, timercnt, 0);	1106	downheap ((WT *)timers, timercnt, 0);
418	}	1107	}
419	else	1108	else
420	evtimer_stop (w); /* nonrepeating: stop timer */	1109	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
421		1110
422	event ((W)w, EV_TIMEOUT);	1111	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
423	}	1112	}
424	}	1113	}
425		1114
426	static void	1115	#if EV_PERIODICS
		1116	inline void
427	periodics_reify ()	1117	periodics_reify (EV_P)
428	{	1118	{
429	while (periodiccnt && periodics [0]->at <= ev_now)	1119	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
430	{	1120	{
431	struct ev_periodic *w = periodics [0];	1121	struct ev_periodic *w = periodics [0];
432		1122
		1123	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1124
433	/* first reschedule or stop timer */	1125	/* first reschedule or stop timer */
434	if (w->interval)	1126	if (w->reschedule_cb)
435	{	1127	{
		1128	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1129	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1130	downheap ((WT *)periodics, periodiccnt, 0);
		1131	}
		1132	else if (w->interval)
		1133	{
436	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1134	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
437	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1135	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
438	downheap ((WT *)periodics, periodiccnt, 0);	1136	downheap ((WT *)periodics, periodiccnt, 0);
439	}	1137	}
440	else	1138	else
441	evperiodic_stop (w); /* nonrepeating: stop timer */	1139	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
442		1140
443	event ((W)w, EV_TIMEOUT);	1141	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
444	}	1142	}
445	}	1143	}
446		1144
447	static void	1145	static void
448	periodics_reschedule (ev_tstamp diff)	1146	periodics_reschedule (EV_P)
449	{	1147	{
450	int i;	1148	int i;
451		1149
452	/* adjust periodics after time jump */	1150	/* adjust periodics after time jump */
453	for (i = 0; i < periodiccnt; ++i)	1151	for (i = 0; i < periodiccnt; ++i)
454	{	1152	{
455	struct ev_periodic *w = periodics [i];	1153	struct ev_periodic *w = periodics [i];
456		1154
		1155	if (w->reschedule_cb)
		1156	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
457	if (w->interval)	1157	else if (w->interval)
		1158	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1159	}
		1160
		1161	/* now rebuild the heap */
		1162	for (i = periodiccnt >> 1; i--; )
		1163	downheap ((WT *)periodics, periodiccnt, i);
		1164	}
		1165	#endif
		1166
		1167	inline int
		1168	time_update_monotonic (EV_P)
		1169	{
		1170	mn_now = get_clock ();
		1171
		1172	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1173	{
		1174	ev_rt_now = rtmn_diff + mn_now;
		1175	return 0;
		1176	}
		1177	else
		1178	{
		1179	now_floor = mn_now;
		1180	ev_rt_now = ev_time ();
		1181	return 1;
		1182	}
		1183	}
		1184
		1185	inline void
		1186	time_update (EV_P)
		1187	{
		1188	int i;
		1189
		1190	#if EV_USE_MONOTONIC
		1191	if (expect_true (have_monotonic))
		1192	{
		1193	if (time_update_monotonic (EV_A))
458	{	1194	{
459	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1195	ev_tstamp odiff = rtmn_diff;
460		1196
461	if (fabs (diff) >= 1e-4)	1197	for (i = 4; --i; ) /* loop a few times, before making important decisions */
462	{	1198	{
463	evperiodic_stop (w);	1199	rtmn_diff = ev_rt_now - mn_now;
464	evperiodic_start (w);
465		1200
466	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1201	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1202	return; /* all is well */
		1203
		1204	ev_rt_now = ev_time ();
		1205	mn_now = get_clock ();
		1206	now_floor = mn_now;
467	}	1207	}
		1208
		1209	# if EV_PERIODICS
		1210	periodics_reschedule (EV_A);
		1211	# endif
		1212	/* no timer adjustment, as the monotonic clock doesn't jump */
		1213	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
468	}	1214	}
469	}	1215	}
470	}	1216	else
471		1217	#endif
472	static void	1218	{
473	time_update ()
474	{
475	int i;
476
477	ev_now = ev_time ();	1219	ev_rt_now = ev_time ();
478		1220
479	if (have_monotonic)	1221	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
480	{
481	ev_tstamp odiff = diff;
482
483	for (i = 4; --i; ) /* loop a few times, before making important decisions */
484	{	1222	{
485	now = get_clock ();	1223	#if EV_PERIODICS
486	diff = ev_now - now;
487
488	if (fabs (odiff - diff) < MIN_TIMEJUMP)
489	return; /* all is well */
490
491	ev_now = ev_time ();
492	}
493
494	periodics_reschedule (diff - odiff);
495	/* no timer adjustment, as the monotonic clock doesn't jump */
496	}
497	else
498	{
499	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
500	{
501	periodics_reschedule (ev_now - now);	1224	periodics_reschedule (EV_A);
		1225	#endif
502		1226
503	/* adjust timers. this is easy, as the offset is the same for all */	1227	/* adjust timers. this is easy, as the offset is the same for all */
504	for (i = 0; i < timercnt; ++i)	1228	for (i = 0; i < timercnt; ++i)
505	timers [i]->at += diff;	1229	((WT)timers [i])->at += ev_rt_now - mn_now;
506	}	1230	}
507		1231
508	now = ev_now;	1232	mn_now = ev_rt_now;
509	}	1233	}
510	}	1234	}
511		1235
512	int ev_loop_done;	1236	void
		1237	ev_ref (EV_P)
		1238	{
		1239	++activecnt;
		1240	}
513		1241
		1242	void
		1243	ev_unref (EV_P)
		1244	{
		1245	--activecnt;
		1246	}
		1247
		1248	static int loop_done;
		1249
		1250	void
514	void ev_loop (int flags)	1251	ev_loop (EV_P_ int flags)
515	{	1252	{
516	double block;	1253	double block;
517	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1254	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
518		1255
519	if (checkcnt)	1256	while (activecnt)
520	{	1257	{
521	queue_events ((W *)checks, checkcnt, EV_CHECK);	1258	/* queue check watchers (and execute them) */
		1259	if (expect_false (preparecnt))
		1260	{
		1261	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
522	call_pending ();	1262	call_pending (EV_A);
523	}	1263	}
524		1264
525	do	1265	/* we might have forked, so reify kernel state if necessary */
526	{	1266	if (expect_false (postfork))
		1267	loop_fork (EV_A);
		1268
527	/* update fd-related kernel structures */	1269	/* update fd-related kernel structures */
528	fd_reify ();	1270	fd_reify (EV_A);
529		1271
530	/* calculate blocking time */	1272	/* calculate blocking time */
531		1273
532	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1274	/* we only need this for !monotonic clock or timers, but as we basically
		1275	always have timers, we just calculate it always */
		1276	#if EV_USE_MONOTONIC
		1277	if (expect_true (have_monotonic))
		1278	time_update_monotonic (EV_A);
		1279	else
		1280	#endif
		1281	{
533	ev_now = ev_time ();	1282	ev_rt_now = ev_time ();
		1283	mn_now = ev_rt_now;
		1284	}
534		1285
535	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1286	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
536	block = 0.;	1287	block = 0.;
537	else	1288	else
538	{	1289	{
539	block = MAX_BLOCKTIME;	1290	block = MAX_BLOCKTIME;
540		1291
541	if (timercnt)	1292	if (timercnt)
542	{	1293	{
543	ev_tstamp to = timers [0]->at - get_clock () + method_fudge;	1294	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
544	if (block > to) block = to;	1295	if (block > to) block = to;
545	}	1296	}
546		1297
		1298	#if EV_PERIODICS
547	if (periodiccnt)	1299	if (periodiccnt)
548	{	1300	{
549	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1301	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
550	if (block > to) block = to;	1302	if (block > to) block = to;
551	}	1303	}
		1304	#endif
552		1305
553	if (block < 0.) block = 0.;	1306	if (expect_false (block < 0.)) block = 0.;
554	}	1307	}
555		1308
556	method_poll (block);	1309	backend_poll (EV_A_ block);
557		1310
558	/* update ev_now, do magic */	1311	/* update ev_rt_now, do magic */
559	time_update ();	1312	time_update (EV_A);
560		1313
561	/* queue pending timers and reschedule them */	1314	/* queue pending timers and reschedule them */
		1315	timers_reify (EV_A); /* relative timers called last */
		1316	#if EV_PERIODICS
562	periodics_reify (); /* absolute timers first */	1317	periodics_reify (EV_A); /* absolute timers called first */
563	timers_reify (); /* relative timers second */	1318	#endif
564		1319
565	/* queue idle watchers unless io or timers are pending */	1320	/* queue idle watchers unless io or timers are pending */
566	if (!pendingcnt)	1321	if (idlecnt && !any_pending (EV_A))
567	queue_events ((W *)idles, idlecnt, EV_IDLE);	1322	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
568		1323
569	/* queue check and possibly idle watchers */	1324	/* queue check watchers, to be executed first */
		1325	if (expect_false (checkcnt))
570	queue_events ((W *)checks, checkcnt, EV_CHECK);	1326	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
571		1327
572	call_pending ();	1328	call_pending (EV_A);
573	}
574	while (!ev_loop_done);
575		1329
		1330	if (expect_false (loop_done))
		1331	break;
		1332	}
		1333
576	if (ev_loop_done != 2)	1334	if (loop_done != 2)
577	ev_loop_done = 0;	1335	loop_done = 0;
		1336	}
		1337
		1338	void
		1339	ev_unloop (EV_P_ int how)
		1340	{
		1341	loop_done = how;
578	}	1342	}
579		1343
580	/*****************************************************************************/	1344	/*****************************************************************************/
581		1345
582	static void	1346	inline void
583	wlist_add (WL *head, WL elem)	1347	wlist_add (WL *head, WL elem)
584	{	1348	{
585	elem->next = *head;	1349	elem->next = *head;
586	*head = elem;	1350	*head = elem;
587	}	1351	}
588		1352
589	static void	1353	inline void
590	wlist_del (WL *head, WL elem)	1354	wlist_del (WL *head, WL elem)
591	{	1355	{
592	while (*head)	1356	while (*head)
593	{	1357	{
594	if (*head == elem)	1358	if (*head == elem)
599		1363
600	head = &(*head)->next;	1364	head = &(*head)->next;
601	}	1365	}
602	}	1366	}
603		1367
604	static void	1368	inline void
		1369	ev_clear_pending (EV_P_ W w)
		1370	{
		1371	if (w->pending)
		1372	{
		1373	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1374	w->pending = 0;
		1375	}
		1376	}
		1377
		1378	inline void
605	ev_start (W w, int active)	1379	ev_start (EV_P_ W w, int active)
606	{	1380	{
607	w->pending = 0;	1381	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1382	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1383
608	w->active = active;	1384	w->active = active;
		1385	ev_ref (EV_A);
609	}	1386	}
610		1387
611	static void	1388	inline void
612	ev_stop (W w)	1389	ev_stop (EV_P_ W w)
613	{	1390	{
614	if (w->pending)	1391	ev_unref (EV_A);
615	pendings [w->pending - 1].w = 0;
616
617	w->active = 0;	1392	w->active = 0;
618	}	1393	}
619		1394
620	/*****************************************************************************/	1395	/*****************************************************************************/
621		1396
622	void	1397	void
623	evio_start (struct ev_io *w)	1398	ev_io_start (EV_P_ struct ev_io *w)
624	{	1399	{
625	if (ev_is_active (w))
626	return;
627
628	int fd = w->fd;	1400	int fd = w->fd;
629		1401
		1402	if (expect_false (ev_is_active (w)))
		1403	return;
		1404
		1405	assert (("ev_io_start called with negative fd", fd >= 0));
		1406
630	ev_start ((W)w, 1);	1407	ev_start (EV_A_ (W)w, 1);
631	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1408	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
632	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1409	wlist_add ((WL *)&anfds[fd].head, (WL)w);
633		1410
634	++fdchangecnt;	1411	fd_change (EV_A_ fd);
635	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
636	fdchanges [fdchangecnt - 1] = fd;
637	}	1412	}
638		1413
639	void	1414	void
640	evio_stop (struct ev_io *w)	1415	ev_io_stop (EV_P_ struct ev_io *w)
641	{	1416	{
		1417	ev_clear_pending (EV_A_ (W)w);
642	if (!ev_is_active (w))	1418	if (expect_false (!ev_is_active (w)))
643	return;	1419	return;
		1420
		1421	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
644		1422
645	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1423	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
646	ev_stop ((W)w);	1424	ev_stop (EV_A_ (W)w);
647		1425
648	++fdchangecnt;	1426	fd_change (EV_A_ w->fd);
649	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
650	fdchanges [fdchangecnt - 1] = w->fd;
651	}	1427	}
652		1428
653
654	void	1429	void
655	evtimer_start (struct ev_timer *w)	1430	ev_timer_start (EV_P_ struct ev_timer *w)
656	{	1431	{
657	if (ev_is_active (w))	1432	if (expect_false (ev_is_active (w)))
658	return;	1433	return;
659		1434
660	w->at += now;	1435	((WT)w)->at += mn_now;
661		1436
662	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1437	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
663		1438
664	ev_start ((W)w, ++timercnt);	1439	ev_start (EV_A_ (W)w, ++timercnt);
665	array_needsize (timers, timermax, timercnt, );	1440	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
666	timers [timercnt - 1] = w;	1441	timers [timercnt - 1] = w;
667	upheap ((WT *)timers, timercnt - 1);	1442	upheap ((WT *)timers, timercnt - 1);
668	}
669		1443
		1444	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1445	}
		1446
670	void	1447	void
671	evtimer_stop (struct ev_timer *w)	1448	ev_timer_stop (EV_P_ struct ev_timer *w)
672	{	1449	{
		1450	ev_clear_pending (EV_A_ (W)w);
673	if (!ev_is_active (w))	1451	if (expect_false (!ev_is_active (w)))
674	return;	1452	return;
675		1453
		1454	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1455
676	if (w->active < timercnt--)	1456	if (expect_true (((W)w)->active < timercnt--))
677	{	1457	{
678	timers [w->active - 1] = timers [timercnt];	1458	timers [((W)w)->active - 1] = timers [timercnt];
679	downheap ((WT *)timers, timercnt, w->active - 1);	1459	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
680	}	1460	}
681		1461
		1462	((WT)w)->at -= mn_now;
		1463
682	ev_stop ((W)w);	1464	ev_stop (EV_A_ (W)w);
683	}	1465	}
684		1466
685	void	1467	void
686	evperiodic_start (struct ev_periodic *w)	1468	ev_timer_again (EV_P_ struct ev_timer *w)
687	{	1469	{
688	if (ev_is_active (w))	1470	if (ev_is_active (w))
689	return;	1471	{
		1472	if (w->repeat)
		1473	{
		1474	((WT)w)->at = mn_now + w->repeat;
		1475	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1476	}
		1477	else
		1478	ev_timer_stop (EV_A_ w);
		1479	}
		1480	else if (w->repeat)
		1481	{
		1482	w->at = w->repeat;
		1483	ev_timer_start (EV_A_ w);
		1484	}
		1485	}
690		1486
691	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1487	#if EV_PERIODICS
		1488	void
		1489	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1490	{
		1491	if (expect_false (ev_is_active (w)))
		1492	return;
692		1493
		1494	if (w->reschedule_cb)
		1495	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1496	else if (w->interval)
		1497	{
		1498	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
693	/* this formula differs from the one in periodic_reify because we do not always round up */	1499	/* this formula differs from the one in periodic_reify because we do not always round up */
694	if (w->interval)
695	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1500	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1501	}
696		1502
697	ev_start ((W)w, ++periodiccnt);	1503	ev_start (EV_A_ (W)w, ++periodiccnt);
698	array_needsize (periodics, periodicmax, periodiccnt, );	1504	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
699	periodics [periodiccnt - 1] = w;	1505	periodics [periodiccnt - 1] = w;
700	upheap ((WT *)periodics, periodiccnt - 1);	1506	upheap ((WT *)periodics, periodiccnt - 1);
701	}
702		1507
		1508	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1509	}
		1510
703	void	1511	void
704	evperiodic_stop (struct ev_periodic *w)	1512	ev_periodic_stop (EV_P_ struct ev_periodic *w)
705	{	1513	{
		1514	ev_clear_pending (EV_A_ (W)w);
706	if (!ev_is_active (w))	1515	if (expect_false (!ev_is_active (w)))
707	return;	1516	return;
708		1517
		1518	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1519
709	if (w->active < periodiccnt--)	1520	if (expect_true (((W)w)->active < periodiccnt--))
710	{	1521	{
711	periodics [w->active - 1] = periodics [periodiccnt];	1522	periodics [((W)w)->active - 1] = periodics [periodiccnt];
712	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1523	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
713	}	1524	}
714		1525
715	ev_stop ((W)w);	1526	ev_stop (EV_A_ (W)w);
716	}	1527	}
717		1528
718	void	1529	void
		1530	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1531	{
		1532	/* TODO: use adjustheap and recalculation */
		1533	ev_periodic_stop (EV_A_ w);
		1534	ev_periodic_start (EV_A_ w);
		1535	}
		1536	#endif
		1537
		1538	void
		1539	ev_idle_start (EV_P_ struct ev_idle *w)
		1540	{
		1541	if (expect_false (ev_is_active (w)))
		1542	return;
		1543
		1544	ev_start (EV_A_ (W)w, ++idlecnt);
		1545	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1546	idles [idlecnt - 1] = w;
		1547	}
		1548
		1549	void
		1550	ev_idle_stop (EV_P_ struct ev_idle *w)
		1551	{
		1552	ev_clear_pending (EV_A_ (W)w);
		1553	if (expect_false (!ev_is_active (w)))
		1554	return;
		1555
		1556	idles [((W)w)->active - 1] = idles [--idlecnt];
		1557	ev_stop (EV_A_ (W)w);
		1558	}
		1559
		1560	void
		1561	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1562	{
		1563	if (expect_false (ev_is_active (w)))
		1564	return;
		1565
		1566	ev_start (EV_A_ (W)w, ++preparecnt);
		1567	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1568	prepares [preparecnt - 1] = w;
		1569	}
		1570
		1571	void
		1572	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1573	{
		1574	ev_clear_pending (EV_A_ (W)w);
		1575	if (expect_false (!ev_is_active (w)))
		1576	return;
		1577
		1578	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1579	ev_stop (EV_A_ (W)w);
		1580	}
		1581
		1582	void
		1583	ev_check_start (EV_P_ struct ev_check *w)
		1584	{
		1585	if (expect_false (ev_is_active (w)))
		1586	return;
		1587
		1588	ev_start (EV_A_ (W)w, ++checkcnt);
		1589	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1590	checks [checkcnt - 1] = w;
		1591	}
		1592
		1593	void
		1594	ev_check_stop (EV_P_ struct ev_check *w)
		1595	{
		1596	ev_clear_pending (EV_A_ (W)w);
		1597	if (expect_false (!ev_is_active (w)))
		1598	return;
		1599
		1600	checks [((W)w)->active - 1] = checks [--checkcnt];
		1601	ev_stop (EV_A_ (W)w);
		1602	}
		1603
		1604	#ifndef SA_RESTART
		1605	# define SA_RESTART 0
		1606	#endif
		1607
		1608	void
719	evsignal_start (struct ev_signal *w)	1609	ev_signal_start (EV_P_ struct ev_signal *w)
720	{	1610	{
		1611	#if EV_MULTIPLICITY
		1612	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1613	#endif
721	if (ev_is_active (w))	1614	if (expect_false (ev_is_active (w)))
722	return;	1615	return;
723		1616
		1617	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1618
724	ev_start ((W)w, 1);	1619	ev_start (EV_A_ (W)w, 1);
725	array_needsize (signals, signalmax, w->signum, signals_init);	1620	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
726	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1621	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
727		1622
728	if (!w->next)	1623	if (!((WL)w)->next)
729	{	1624	{
		1625	#if _WIN32
		1626	signal (w->signum, sighandler);
		1627	#else
730	struct sigaction sa;	1628	struct sigaction sa;
731	sa.sa_handler = sighandler;	1629	sa.sa_handler = sighandler;
732	sigfillset (&sa.sa_mask);	1630	sigfillset (&sa.sa_mask);
733	sa.sa_flags = 0;	1631	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
734	sigaction (w->signum, &sa, 0);	1632	sigaction (w->signum, &sa, 0);
		1633	#endif
735	}	1634	}
736	}	1635	}
737		1636
738	void	1637	void
739	evsignal_stop (struct ev_signal *w)	1638	ev_signal_stop (EV_P_ struct ev_signal *w)
740	{	1639	{
		1640	ev_clear_pending (EV_A_ (W)w);
741	if (!ev_is_active (w))	1641	if (expect_false (!ev_is_active (w)))
742	return;	1642	return;
743		1643
744	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1644	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
745	ev_stop ((W)w);	1645	ev_stop (EV_A_ (W)w);
746		1646
747	if (!signals [w->signum - 1].head)	1647	if (!signals [w->signum - 1].head)
748	signal (w->signum, SIG_DFL);	1648	signal (w->signum, SIG_DFL);
749	}	1649	}
750		1650
751	void evidle_start (struct ev_idle *w)	1651	void
		1652	ev_child_start (EV_P_ struct ev_child *w)
752	{	1653	{
		1654	#if EV_MULTIPLICITY
		1655	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1656	#endif
753	if (ev_is_active (w))	1657	if (expect_false (ev_is_active (w)))
754	return;	1658	return;
755		1659
756	ev_start ((W)w, ++idlecnt);	1660	ev_start (EV_A_ (W)w, 1);
757	array_needsize (idles, idlemax, idlecnt, );	1661	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
758	idles [idlecnt - 1] = w;
759	}	1662	}
760		1663
761	void evidle_stop (struct ev_idle *w)	1664	void
		1665	ev_child_stop (EV_P_ struct ev_child *w)
762	{	1666	{
763	idles [w->active - 1] = idles [--idlecnt];	1667	ev_clear_pending (EV_A_ (W)w);
		1668	if (expect_false (!ev_is_active (w)))
		1669	return;
		1670
		1671	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
764	ev_stop ((W)w);	1672	ev_stop (EV_A_ (W)w);
765	}	1673	}
766		1674
767	void evcheck_start (struct ev_check *w)	1675	#if EV_MULTIPLICITY
		1676	static void
		1677	embed_cb (EV_P_ struct ev_io *io, int revents)
768	{	1678	{
		1679	struct ev_embed w = (struct ev_embed )(((char *)io) - offsetof (struct ev_embed, io));
		1680
		1681	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		1682	ev_loop (w->loop, EVLOOP_NONBLOCK);
		1683	}
		1684
		1685	void
		1686	ev_embed_start (EV_P_ struct ev_embed *w)
		1687	{
769	if (ev_is_active (w))	1688	if (expect_false (ev_is_active (w)))
770	return;	1689	return;
771		1690
772	ev_start ((W)w, ++checkcnt);	1691	{
773	array_needsize (checks, checkmax, checkcnt, );	1692	struct ev_loop *loop = w->loop;
774	checks [checkcnt - 1] = w;	1693	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
775	}	1694	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		1695	}
776		1696
777	void evcheck_stop (struct ev_check *w)	1697	ev_io_start (EV_A_ &w->io);
		1698	ev_start (EV_A_ (W)w, 1);
		1699	}
		1700
		1701	void
		1702	ev_embed_stop (EV_P_ struct ev_embed *w)
778	{	1703	{
779	checks [w->active - 1] = checks [--checkcnt];	1704	ev_clear_pending (EV_A_ (W)w);
		1705	if (expect_false (!ev_is_active (w)))
		1706	return;
		1707
		1708	ev_io_stop (EV_A_ &w->io);
780	ev_stop ((W)w);	1709	ev_stop (EV_A_ (W)w);
781	}	1710	}
		1711	#endif
782		1712
783	/*****************************************************************************/	1713	/*****************************************************************************/
784		1714
785	#if 0	1715	struct ev_once
786		1716	{
787	struct ev_io wio;	1717	struct ev_io io;
788
789	static void
790	sin_cb (struct ev_io *w, int revents)
791	{
792	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
793	}
794
795	static void
796	ocb (struct ev_timer *w, int revents)
797	{
798	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
799	evtimer_stop (w);
800	evtimer_start (w);
801	}
802
803	static void
804	scb (struct ev_signal *w, int revents)
805	{
806	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
807	evio_stop (&wio);
808	evio_start (&wio);
809	}
810
811	static void
812	gcb (struct ev_signal *w, int revents)
813	{
814	fprintf (stderr, "generic %x\n", revents);
815
816	}
817
818	int main (void)
819	{
820	ev_init (0);
821
822	evio_init (&wio, sin_cb, 0, EV_READ);
823	evio_start (&wio);
824
825	struct ev_timer t[10000];
826
827	#if 0
828	int i;
829	for (i = 0; i < 10000; ++i)
830	{
831	struct ev_timer *w = t + i;
832	evw_init (w, ocb, i);
833	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
834	evtimer_start (w);
835	if (drand48 () < 0.5)
836	evtimer_stop (w);
837	}
838	#endif
839
840	struct ev_timer t1;	1718	struct ev_timer to;
841	evtimer_init (&t1, ocb, 5, 10);	1719	void (cb)(int revents, void arg);
842	evtimer_start (&t1);	1720	void *arg;
		1721	};
843		1722
844	struct ev_signal sig;	1723	static void
845	evsignal_init (&sig, scb, SIGQUIT);	1724	once_cb (EV_P_ struct ev_once *once, int revents)
846	evsignal_start (&sig);	1725	{
		1726	void (cb)(int revents, void arg) = once->cb;
		1727	void *arg = once->arg;
847		1728
848	struct ev_check cw;	1729	ev_io_stop (EV_A_ &once->io);
849	evcheck_init (&cw, gcb);	1730	ev_timer_stop (EV_A_ &once->to);
850	evcheck_start (&cw);	1731	ev_free (once);
851		1732
852	struct ev_idle iw;	1733	cb (revents, arg);
853	evidle_init (&iw, gcb);	1734	}
854	evidle_start (&iw);
855		1735
856	ev_loop (0);	1736	static void
		1737	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1738	{
		1739	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1740	}
857		1741
		1742	static void
		1743	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1744	{
		1745	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1746	}
		1747
		1748	void
		1749	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1750	{
		1751	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
		1752
		1753	if (expect_false (!once))
		1754	{
		1755	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
858	return 0;	1756	return;
859	}	1757	}
860		1758
861	#endif	1759	once->cb = cb;
		1760	once->arg = arg;
862		1761
		1762	ev_init (&once->io, once_cb_io);
		1763	if (fd >= 0)
		1764	{
		1765	ev_io_set (&once->io, fd, events);
		1766	ev_io_start (EV_A_ &once->io);
		1767	}
863		1768
		1769	ev_init (&once->to, once_cb_to);
		1770	if (timeout >= 0.)
		1771	{
		1772	ev_timer_set (&once->to, timeout, 0.);
		1773	ev_timer_start (EV_A_ &once->to);
		1774	}
		1775	}
864		1776
		1777	#ifdef __cplusplus
		1778	}
		1779	#endif
865		1780

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Comparing libev/ev.c (file contents): Revision 1.13 by root, Wed Oct 31 10:50:05 2007 UTC vs. Revision 1.134 by root, Fri Nov 23 19:13:33 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.13 by root, Wed Oct 31 10:50:05 2007 UTC vs.
Revision 1.134 by root, Fri Nov 23 19:13:33 2007 UTC