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

Comparing libev/ev.c (file contents):
Revision 1.9 by root, Wed Oct 31 07:24:17 2007 UTC vs.
Revision 1.114 by root, Mon Nov 12 20:03:39 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	# include "config.h"
		38
		39	# if HAVE_CLOCK_GETTIME
		40	# ifndef EV_USE_MONOTONIC
		41	# define EV_USE_MONOTONIC 1
		42	# endif
		43	# ifndef EV_USE_REALTIME
		44	# define EV_USE_REALTIME 1
		45	# endif
		46	# endif
		47
		48	# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT)
		49	# define EV_USE_SELECT 1
		50	# endif
		51
		52	# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL)
		53	# define EV_USE_POLL 1
		54	# endif
		55
		56	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL)
		57	# define EV_USE_EPOLL 1
		58	# endif
		59
		60	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE)
		61	# define EV_USE_KQUEUE 1
		62	# endif
		63
		64	#endif
		65
1	#include <math.h>	66	#include <math.h>
2	#include <stdlib.h>	67	#include <stdlib.h>
3	#include <unistd.h>
4	#include <fcntl.h>	68	#include <fcntl.h>
5	#include <signal.h>	69	#include <stddef.h>
6		70
7	#include <stdio.h>	71	#include <stdio.h>
8		72
9	#include <assert.h>	73	#include <assert.h>
10	#include <errno.h>	74	#include <errno.h>
11	#include <sys/time.h>	75	#include <sys/types.h>
12	#include <time.h>	76	#include <time.h>
13		77
		78	#include <signal.h>
		79
		80	#ifndef _WIN32
		81	# include <unistd.h>
		82	# include <sys/time.h>
		83	# include <sys/wait.h>
		84	#else
		85	# define WIN32_LEAN_AND_MEAN
		86	# include <windows.h>
		87	# ifndef EV_SELECT_IS_WINSOCKET
		88	# define EV_SELECT_IS_WINSOCKET 1
		89	# endif
		90	#endif
		91
		92	/**/
		93
		94	#ifndef EV_USE_MONOTONIC
		95	# define EV_USE_MONOTONIC 1
		96	#endif
		97
		98	#ifndef EV_USE_SELECT
		99	# define EV_USE_SELECT 1
		100	# define EV_SELECT_USE_FD_SET 1
		101	#endif
		102
		103	#ifndef EV_USE_POLL
		104	# ifdef _WIN32
		105	# define EV_USE_POLL 0
		106	# else
		107	# define EV_USE_POLL 1
		108	# endif
		109	#endif
		110
		111	#ifndef EV_USE_EPOLL
		112	# define EV_USE_EPOLL 0
		113	#endif
		114
		115	#ifndef EV_USE_KQUEUE
		116	# define EV_USE_KQUEUE 0
		117	#endif
		118
		119	#ifndef EV_USE_REALTIME
		120	# define EV_USE_REALTIME 1
		121	#endif
		122
		123	/**/
		124
		125	/* darwin simply cannot be helped */
		126	#ifdef __APPLE__
		127	# undef EV_USE_POLL
		128	# undef EV_USE_KQUEUE
		129	#endif
		130
14	#ifdef CLOCK_MONOTONIC	131	#ifndef CLOCK_MONOTONIC
		132	# undef EV_USE_MONOTONIC
15	# define HAVE_MONOTONIC 1	133	# define EV_USE_MONOTONIC 0
16	#endif	134	#endif
17		135
		136	#ifndef CLOCK_REALTIME
		137	# undef EV_USE_REALTIME
18	#define HAVE_REALTIME 1	138	# define EV_USE_REALTIME 0
19	#define HAVE_EPOLL 1	139	#endif
20	#define HAVE_SELECT 1	140
		141	#if EV_SELECT_IS_WINSOCKET
		142	# include <winsock.h>
		143	#endif
		144
		145	/**/
21		146
22	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	147	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
23	#define MAX_BLOCKTIME 60.	148	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		149	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		150	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
24		151
		152	#ifdef EV_H
		153	# include EV_H
		154	#else
25	#include "ev.h"	155	# include "ev.h"
		156	#endif
26		157
		158	#if __GNUC__ >= 3
		159	# define expect(expr,value) __builtin_expect ((expr),(value))
		160	# define inline inline
		161	#else
		162	# define expect(expr,value) (expr)
		163	# define inline static
		164	#endif
		165
		166	#define expect_false(expr) expect ((expr) != 0, 0)
		167	#define expect_true(expr) expect ((expr) != 0, 1)
		168
		169	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		170	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		171
		172	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		173	#define EMPTY2(a,b) /* used to suppress some warnings */
		174
27	struct ev_watcher {	175	typedef struct ev_watcher *W;
28	EV_WATCHER (ev_watcher);
29	};
30
31	struct ev_watcher_list {	176	typedef struct ev_watcher_list *WL;
32	EV_WATCHER_LIST (ev_watcher_list);	177	typedef struct ev_watcher_time *WT;
33	};
34		178
35	static ev_tstamp now, diff; /* monotonic clock */	179	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		180
		181	#ifdef _WIN32
		182	# include "ev_win32.c"
		183	#endif
		184
		185	/*****************************************************************************/
		186
		187	static void (syserr_cb)(const char msg);
		188
		189	void ev_set_syserr_cb (void (cb)(const char msg))
		190	{
		191	syserr_cb = cb;
		192	}
		193
		194	static void
		195	syserr (const char *msg)
		196	{
		197	if (!msg)
		198	msg = "(libev) system error";
		199
		200	if (syserr_cb)
		201	syserr_cb (msg);
		202	else
		203	{
		204	perror (msg);
		205	abort ();
		206	}
		207	}
		208
		209	static void (alloc)(void *ptr, long size);
		210
		211	void ev_set_allocator (void (cb)(void *ptr, long size))
		212	{
		213	alloc = cb;
		214	}
		215
		216	static void *
		217	ev_realloc (void *ptr, long size)
		218	{
		219	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		220
		221	if (!ptr && size)
		222	{
		223	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		224	abort ();
		225	}
		226
		227	return ptr;
		228	}
		229
		230	#define ev_malloc(size) ev_realloc (0, (size))
		231	#define ev_free(ptr) ev_realloc ((ptr), 0)
		232
		233	/*****************************************************************************/
		234
		235	typedef struct
		236	{
		237	WL head;
		238	unsigned char events;
		239	unsigned char reify;
		240	#if EV_SELECT_IS_WINSOCKET
		241	SOCKET handle;
		242	#endif
		243	} ANFD;
		244
		245	typedef struct
		246	{
		247	W w;
		248	int events;
		249	} ANPENDING;
		250
		251	#if EV_MULTIPLICITY
		252
		253	struct ev_loop
		254	{
		255	ev_tstamp ev_rt_now;
		256	#define ev_rt_now ((loop)->ev_rt_now)
		257	#define VAR(name,decl) decl;
		258	#include "ev_vars.h"
		259	#undef VAR
		260	};
		261	#include "ev_wrap.h"
		262
		263	struct ev_loop default_loop_struct;
		264	static struct ev_loop *default_loop;
		265
		266	#else
		267
36	ev_tstamp ev_now;	268	ev_tstamp ev_rt_now;
37	int ev_method;	269	#define VAR(name,decl) static decl;
		270	#include "ev_vars.h"
		271	#undef VAR
38		272
39	static int have_monotonic; /* runtime */	273	static int default_loop;
40		274
41	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	275	#endif
42	static void (*method_modify)(int fd, int oev, int nev);
43	static void (*method_poll)(ev_tstamp timeout);
44		276
45	/*****************************************************************************/	277	/*****************************************************************************/
46		278
47	ev_tstamp	279	ev_tstamp
48	ev_time (void)	280	ev_time (void)
49	{	281	{
50	#if HAVE_REALTIME	282	#if EV_USE_REALTIME
51	struct timespec ts;	283	struct timespec ts;
52	clock_gettime (CLOCK_REALTIME, &ts);	284	clock_gettime (CLOCK_REALTIME, &ts);
53	return ts.tv_sec + ts.tv_nsec * 1e-9;	285	return ts.tv_sec + ts.tv_nsec * 1e-9;
54	#else	286	#else
55	struct timeval tv;	287	struct timeval tv;
56	gettimeofday (&tv, 0);	288	gettimeofday (&tv, 0);
57	return tv.tv_sec + tv.tv_usec * 1e-6;	289	return tv.tv_sec + tv.tv_usec * 1e-6;
58	#endif	290	#endif
59	}	291	}
60		292
61	static ev_tstamp	293	inline ev_tstamp
62	get_clock (void)	294	get_clock (void)
63	{	295	{
64	#if HAVE_MONOTONIC	296	#if EV_USE_MONOTONIC
65	if (have_monotonic)	297	if (expect_true (have_monotonic))
66	{	298	{
67	struct timespec ts;	299	struct timespec ts;
68	clock_gettime (CLOCK_MONOTONIC, &ts);	300	clock_gettime (CLOCK_MONOTONIC, &ts);
69	return ts.tv_sec + ts.tv_nsec * 1e-9;	301	return ts.tv_sec + ts.tv_nsec * 1e-9;
70	}	302	}
71	#endif	303	#endif
72		304
73	return ev_time ();	305	return ev_time ();
74	}	306	}
75		307
		308	#if EV_MULTIPLICITY
		309	ev_tstamp
		310	ev_now (EV_P)
		311	{
		312	return ev_rt_now;
		313	}
		314	#endif
		315
		316	#define array_roundsize(type,n) (((n) \| 4) & ~3)
		317
76	#define array_needsize(base,cur,cnt,init) \	318	#define array_needsize(type,base,cur,cnt,init) \
77	if ((cnt) > cur) \	319	if (expect_false ((cnt) > cur)) \
78	{ \	320	{ \
79	int newcnt = cur ? cur << 1 : 16; \	321	int newcnt = cur; \
80	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	322	do \
		323	{ \
		324	newcnt = array_roundsize (type, newcnt << 1); \
		325	} \
		326	while ((cnt) > newcnt); \
		327	\
81	base = realloc (base, sizeof (base) (newcnt)); \	328	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
82	init (base + cur, newcnt - cur); \	329	init (base + cur, newcnt - cur); \
83	cur = newcnt; \	330	cur = newcnt; \
84	}	331	}
		332
		333	#define array_slim(type,stem) \
		334	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		335	{ \
		336	stem ## max = array_roundsize (stem ## cnt >> 1); \
		337	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
		338	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		339	}
		340
		341	#define array_free(stem, idx) \
		342	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
85		343
86	/*****************************************************************************/	344	/*****************************************************************************/
87		345
88	typedef struct
89	{
90	struct ev_io *head;
91	unsigned char wev, rev; /* want, received event set */
92	} ANFD;
93
94	static ANFD *anfds;
95	static int anfdmax;
96
97	static int *fdchanges;
98	static int fdchangemax, fdchangecnt;
99
100	static void	346	static void
101	anfds_init (ANFD *base, int count)	347	anfds_init (ANFD *base, int count)
102	{	348	{
103	while (count--)	349	while (count--)
104	{	350	{
105	base->head = 0;	351	base->head = 0;
106	base->wev = base->rev = EV_NONE;	352	base->events = EV_NONE;
		353	base->reify = 0;
		354
107	++base;	355	++base;
108	}	356	}
109	}	357	}
110		358
111	typedef struct	359	void
		360	ev_feed_event (EV_P_ void *w, int revents)
112	{	361	{
113	struct ev_watcher *w;	362	W w_ = (W)w;
114	int events;
115	} ANPENDING;
116		363
117	static ANPENDING *pendings;	364	if (w_->pending)
118	static int pendingmax, pendingcnt;	365	{
		366	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		367	return;
		368	}
119		369
120	static void
121	event (struct ev_watcher *w, int events)
122	{
123	w->pending = ++pendingcnt;	370	w_->pending = ++pendingcnt [ABSPRI (w_)];
124	array_needsize (pendings, pendingmax, pendingcnt, );	371	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
125	pendings [pendingcnt - 1].w = w;	372	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
126	pendings [pendingcnt - 1].events = events;	373	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
127	}	374	}
128		375
129	static void	376	static void
		377	queue_events (EV_P_ W *events, int eventcnt, int type)
		378	{
		379	int i;
		380
		381	for (i = 0; i < eventcnt; ++i)
		382	ev_feed_event (EV_A_ events [i], type);
		383	}
		384
		385	inline void
130	fd_event (int fd, int events)	386	fd_event (EV_P_ int fd, int revents)
131	{	387	{
132	ANFD *anfd = anfds + fd;	388	ANFD *anfd = anfds + fd;
133	struct ev_io *w;	389	struct ev_io *w;
134		390
135	for (w = anfd->head; w; w = w->next)	391	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
136	{	392	{
137	int ev = w->events & events;	393	int ev = w->events & revents;
138		394
139	if (ev)	395	if (ev)
140	event ((struct ev_watcher *)w, ev);	396	ev_feed_event (EV_A_ (W)w, ev);
141	}	397	}
142	}	398	}
143		399
144	static void	400	void
145	queue_events (struct ev_watcher **events, int eventcnt, int type)	401	ev_feed_fd_event (EV_P_ int fd, int revents)
146	{	402	{
147	int i;	403	fd_event (EV_A_ fd, revents);
148
149	for (i = 0; i < eventcnt; ++i)
150	event (events [i], type);
151	}	404	}
152		405
153	/*****************************************************************************/	406	/*****************************************************************************/
154		407
155	static struct ev_timer **atimers;
156	static int atimermax, atimercnt;
157
158	static struct ev_timer **rtimers;
159	static int rtimermax, rtimercnt;
160
161	static void	408	static void
162	upheap (struct ev_timer **timers, int k)	409	fd_reify (EV_P)
163	{
164	struct ev_timer *w = timers [k];
165
166	while (k && timers [k >> 1]->at > w->at)
167	{
168	timers [k] = timers [k >> 1];
169	timers [k]->active = k + 1;
170	k >>= 1;
171	}
172
173	timers [k] = w;
174	timers [k]->active = k + 1;
175
176	}
177
178	static void
179	downheap (struct ev_timer **timers, int N, int k)
180	{
181	struct ev_timer *w = timers [k];
182
183	while (k < (N >> 1))
184	{
185	int j = k << 1;
186
187	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
188	++j;
189
190	if (w->at <= timers [j]->at)
191	break;
192
193	timers [k] = timers [j];
194	timers [k]->active = k + 1;
195	k = j;
196	}
197
198	timers [k] = w;
199	timers [k]->active = k + 1;
200	}
201
202	/*****************************************************************************/
203
204	typedef struct
205	{
206	struct ev_signal *head;
207	sig_atomic_t gotsig;
208	} ANSIG;
209
210	static ANSIG *signals;
211	static int signalmax;
212
213	static int sigpipe [2];
214	static sig_atomic_t gotsig;
215	static struct ev_io sigev;
216
217	static void
218	signals_init (ANSIG *base, int count)
219	{
220	while (count--)
221	{
222	base->head = 0;
223	base->gotsig = 0;
224	++base;
225	}
226	}
227
228	static void
229	sighandler (int signum)
230	{
231	signals [signum - 1].gotsig = 1;
232
233	if (!gotsig)
234	{
235	gotsig = 1;
236	write (sigpipe [1], &gotsig, 1);
237	}
238	}
239
240	static void
241	sigcb (struct ev_io *iow, int revents)
242	{
243	struct ev_signal *w;
244	int sig;
245
246	gotsig = 0;
247	read (sigpipe [0], &revents, 1);
248
249	for (sig = signalmax; sig--; )
250	if (signals [sig].gotsig)
251	{
252	signals [sig].gotsig = 0;
253
254	for (w = signals [sig].head; w; w = w->next)
255	event ((struct ev_watcher *)w, EV_SIGNAL);
256	}
257	}
258
259	static void
260	siginit (void)
261	{
262	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
263	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
264
265	/* rather than sort out wether we really need nb, set it */
266	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
267	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
268
269	evio_set (&sigev, sigpipe [0], EV_READ);
270	evio_start (&sigev);
271	}
272
273	/*****************************************************************************/
274
275	static struct ev_idle **idles;
276	static int idlemax, idlecnt;
277
278	static struct ev_check **checks;
279	static int checkmax, checkcnt;
280
281	/*****************************************************************************/
282
283	#if HAVE_EPOLL
284	# include "ev_epoll.c"
285	#endif
286	#if HAVE_SELECT
287	# include "ev_select.c"
288	#endif
289
290	int ev_init (int flags)
291	{
292	#if HAVE_MONOTONIC
293	{
294	struct timespec ts;
295	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
296	have_monotonic = 1;
297	}
298	#endif
299
300	ev_now = ev_time ();
301	now = get_clock ();
302	diff = ev_now - now;
303
304	if (pipe (sigpipe))
305	return 0;
306
307	ev_method = EVMETHOD_NONE;
308	#if HAVE_EPOLL
309	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
310	#endif
311	#if HAVE_SELECT
312	if (ev_method == EVMETHOD_NONE) select_init (flags);
313	#endif
314
315	if (ev_method)
316	{
317	evw_init (&sigev, sigcb, 0);
318	siginit ();
319	}
320
321	return ev_method;
322	}
323
324	/*****************************************************************************/
325
326	void ev_prefork (void)
327	{
328	}
329
330	void ev_postfork_parent (void)
331	{
332	}
333
334	void ev_postfork_child (void)
335	{
336	#if HAVE_EPOLL
337	if (ev_method == EVMETHOD_EPOLL)
338	epoll_postfork_child ();
339	#endif
340
341	evio_stop (&sigev);
342	close (sigpipe [0]);
343	close (sigpipe [1]);
344	pipe (sigpipe);
345	siginit ();
346	}
347
348	/*****************************************************************************/
349
350	static void
351	fd_reify (void)
352	{	410	{
353	int i;	411	int i;
354		412
355	for (i = 0; i < fdchangecnt; ++i)	413	for (i = 0; i < fdchangecnt; ++i)
356	{	414	{
357	int fd = fdchanges [i];	415	int fd = fdchanges [i];
358	ANFD *anfd = anfds + fd;	416	ANFD *anfd = anfds + fd;
359	struct ev_io *w;	417	struct ev_io *w;
360		418
361	int wev = 0;	419	int events = 0;
362		420
363	for (w = anfd->head; w; w = w->next)	421	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
364	wev \|= w->events;	422	events \|= w->events;
365		423
366	if (anfd->wev != wev)	424	#if EV_SELECT_IS_WINSOCKET
		425	if (events)
367	{	426	{
368	method_modify (fd, anfd->wev, wev);	427	unsigned long argp;
369	anfd->wev = wev;	428	anfd->handle = _get_osfhandle (fd);
		429	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
370	}	430	}
		431	#endif
		432
		433	anfd->reify = 0;
		434
		435	method_modify (EV_A_ fd, anfd->events, events);
		436	anfd->events = events;
371	}	437	}
372		438
373	fdchangecnt = 0;	439	fdchangecnt = 0;
374	}	440	}
375		441
376	static void	442	static void
377	call_pending ()	443	fd_change (EV_P_ int fd)
		444	{
		445	if (anfds [fd].reify)
		446	return;
		447
		448	anfds [fd].reify = 1;
		449
		450	++fdchangecnt;
		451	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		452	fdchanges [fdchangecnt - 1] = fd;
		453	}
		454
		455	static void
		456	fd_kill (EV_P_ int fd)
		457	{
		458	struct ev_io *w;
		459
		460	while ((w = (struct ev_io *)anfds [fd].head))
		461	{
		462	ev_io_stop (EV_A_ w);
		463	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		464	}
		465	}
		466
		467	static int
		468	fd_valid (int fd)
		469	{
		470	#ifdef _WIN32
		471	return _get_osfhandle (fd) != -1;
		472	#else
		473	return fcntl (fd, F_GETFD) != -1;
		474	#endif
		475	}
		476
		477	/* called on EBADF to verify fds */
		478	static void
		479	fd_ebadf (EV_P)
		480	{
		481	int fd;
		482
		483	for (fd = 0; fd < anfdmax; ++fd)
		484	if (anfds [fd].events)
		485	if (!fd_valid (fd) == -1 && errno == EBADF)
		486	fd_kill (EV_A_ fd);
		487	}
		488
		489	/* called on ENOMEM in select/poll to kill some fds and retry */
		490	static void
		491	fd_enomem (EV_P)
		492	{
		493	int fd;
		494
		495	for (fd = anfdmax; fd--; )
		496	if (anfds [fd].events)
		497	{
		498	fd_kill (EV_A_ fd);
		499	return;
		500	}
		501	}
		502
		503	/* usually called after fork if method needs to re-arm all fds from scratch */
		504	static void
		505	fd_rearm_all (EV_P)
		506	{
		507	int fd;
		508
		509	/* this should be highly optimised to not do anything but set a flag */
		510	for (fd = 0; fd < anfdmax; ++fd)
		511	if (anfds [fd].events)
		512	{
		513	anfds [fd].events = 0;
		514	fd_change (EV_A_ fd);
		515	}
		516	}
		517
		518	/*****************************************************************************/
		519
		520	static void
		521	upheap (WT *heap, int k)
		522	{
		523	WT w = heap [k];
		524
		525	while (k && heap [k >> 1]->at > w->at)
		526	{
		527	heap [k] = heap [k >> 1];
		528	((W)heap [k])->active = k + 1;
		529	k >>= 1;
		530	}
		531
		532	heap [k] = w;
		533	((W)heap [k])->active = k + 1;
		534
		535	}
		536
		537	static void
		538	downheap (WT *heap, int N, int k)
		539	{
		540	WT w = heap [k];
		541
		542	while (k < (N >> 1))
		543	{
		544	int j = k << 1;
		545
		546	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		547	++j;
		548
		549	if (w->at <= heap [j]->at)
		550	break;
		551
		552	heap [k] = heap [j];
		553	((W)heap [k])->active = k + 1;
		554	k = j;
		555	}
		556
		557	heap [k] = w;
		558	((W)heap [k])->active = k + 1;
		559	}
		560
		561	inline void
		562	adjustheap (WT *heap, int N, int k)
		563	{
		564	upheap (heap, k);
		565	downheap (heap, N, k);
		566	}
		567
		568	/*****************************************************************************/
		569
		570	typedef struct
		571	{
		572	WL head;
		573	sig_atomic_t volatile gotsig;
		574	} ANSIG;
		575
		576	static ANSIG *signals;
		577	static int signalmax;
		578
		579	static int sigpipe [2];
		580	static sig_atomic_t volatile gotsig;
		581	static struct ev_io sigev;
		582
		583	static void
		584	signals_init (ANSIG *base, int count)
		585	{
		586	while (count--)
		587	{
		588	base->head = 0;
		589	base->gotsig = 0;
		590
		591	++base;
		592	}
		593	}
		594
		595	static void
		596	sighandler (int signum)
		597	{
		598	#if _WIN32
		599	signal (signum, sighandler);
		600	#endif
		601
		602	signals [signum - 1].gotsig = 1;
		603
		604	if (!gotsig)
		605	{
		606	int old_errno = errno;
		607	gotsig = 1;
		608	write (sigpipe [1], &signum, 1);
		609	errno = old_errno;
		610	}
		611	}
		612
		613	void
		614	ev_feed_signal_event (EV_P_ int signum)
		615	{
		616	WL w;
		617
		618	#if EV_MULTIPLICITY
		619	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		620	#endif
		621
		622	--signum;
		623
		624	if (signum < 0 \|\| signum >= signalmax)
		625	return;
		626
		627	signals [signum].gotsig = 0;
		628
		629	for (w = signals [signum].head; w; w = w->next)
		630	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		631	}
		632
		633	static void
		634	sigcb (EV_P_ struct ev_io *iow, int revents)
		635	{
		636	int signum;
		637
		638	read (sigpipe [0], &revents, 1);
		639	gotsig = 0;
		640
		641	for (signum = signalmax; signum--; )
		642	if (signals [signum].gotsig)
		643	ev_feed_signal_event (EV_A_ signum + 1);
		644	}
		645
		646	inline void
		647	fd_intern (int fd)
		648	{
		649	#ifdef _WIN32
		650	int arg = 1;
		651	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		652	#else
		653	fcntl (fd, F_SETFD, FD_CLOEXEC);
		654	fcntl (fd, F_SETFL, O_NONBLOCK);
		655	#endif
		656	}
		657
		658	static void
		659	siginit (EV_P)
		660	{
		661	fd_intern (sigpipe [0]);
		662	fd_intern (sigpipe [1]);
		663
		664	ev_io_set (&sigev, sigpipe [0], EV_READ);
		665	ev_io_start (EV_A_ &sigev);
		666	ev_unref (EV_A); /* child watcher should not keep loop alive */
		667	}
		668
		669	/*****************************************************************************/
		670
		671	static struct ev_child *childs [PID_HASHSIZE];
		672
		673	#ifndef _WIN32
		674
		675	static struct ev_signal childev;
		676
		677	#ifndef WCONTINUED
		678	# define WCONTINUED 0
		679	#endif
		680
		681	static void
		682	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		683	{
		684	struct ev_child *w;
		685
		686	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		687	if (w->pid == pid \|\| !w->pid)
		688	{
		689	ev_priority (w) = ev_priority (sw); /* need to do it now */
		690	w->rpid = pid;
		691	w->rstatus = status;
		692	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		693	}
		694	}
		695
		696	static void
		697	childcb (EV_P_ struct ev_signal *sw, int revents)
		698	{
		699	int pid, status;
		700
		701	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		702	{
		703	/* make sure we are called again until all childs have been reaped */
		704	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		705
		706	child_reap (EV_A_ sw, pid, pid, status);
		707	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		708	}
		709	}
		710
		711	#endif
		712
		713	/*****************************************************************************/
		714
		715	#if EV_USE_KQUEUE
		716	# include "ev_kqueue.c"
		717	#endif
		718	#if EV_USE_EPOLL
		719	# include "ev_epoll.c"
		720	#endif
		721	#if EV_USE_POLL
		722	# include "ev_poll.c"
		723	#endif
		724	#if EV_USE_SELECT
		725	# include "ev_select.c"
		726	#endif
		727
		728	int
		729	ev_version_major (void)
		730	{
		731	return EV_VERSION_MAJOR;
		732	}
		733
		734	int
		735	ev_version_minor (void)
		736	{
		737	return EV_VERSION_MINOR;
		738	}
		739
		740	/* return true if we are running with elevated privileges and should ignore env variables */
		741	static int
		742	enable_secure (void)
		743	{
		744	#ifdef _WIN32
		745	return 0;
		746	#else
		747	return getuid () != geteuid ()
		748	\|\| getgid () != getegid ();
		749	#endif
		750	}
		751
		752	unsigned int
		753	ev_method (EV_P)
		754	{
		755	return method;
		756	}
		757
		758	static void
		759	loop_init (EV_P_ unsigned int flags)
		760	{
		761	if (!method)
		762	{
		763	#if EV_USE_MONOTONIC
		764	{
		765	struct timespec ts;
		766	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		767	have_monotonic = 1;
		768	}
		769	#endif
		770
		771	ev_rt_now = ev_time ();
		772	mn_now = get_clock ();
		773	now_floor = mn_now;
		774	rtmn_diff = ev_rt_now - mn_now;
		775
		776	if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS"))
		777	flags = atoi (getenv ("LIBEV_FLAGS"));
		778
		779	if (!(flags & 0x0000ffff))
		780	flags \|= 0x0000ffff;
		781
		782	method = 0;
		783	#if EV_USE_KQUEUE
		784	if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags);
		785	#endif
		786	#if EV_USE_EPOLL
		787	if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags);
		788	#endif
		789	#if EV_USE_POLL
		790	if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags);
		791	#endif
		792	#if EV_USE_SELECT
		793	if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags);
		794	#endif
		795
		796	ev_init (&sigev, sigcb);
		797	ev_set_priority (&sigev, EV_MAXPRI);
		798	}
		799	}
		800
		801	void
		802	loop_destroy (EV_P)
378	{	803	{
379	int i;	804	int i;
380		805
381	for (i = 0; i < pendingcnt; ++i)	806	#if EV_USE_KQUEUE
		807	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		808	#endif
		809	#if EV_USE_EPOLL
		810	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		811	#endif
		812	#if EV_USE_POLL
		813	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		814	#endif
		815	#if EV_USE_SELECT
		816	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		817	#endif
		818
		819	for (i = NUMPRI; i--; )
		820	array_free (pending, [i]);
		821
		822	/* have to use the microsoft-never-gets-it-right macro */
		823	array_free (fdchange, EMPTY0);
		824	array_free (timer, EMPTY0);
		825	#if EV_PERIODICS
		826	array_free (periodic, EMPTY0);
		827	#endif
		828	array_free (idle, EMPTY0);
		829	array_free (prepare, EMPTY0);
		830	array_free (check, EMPTY0);
		831
		832	method = 0;
		833	}
		834
		835	static void
		836	loop_fork (EV_P)
		837	{
		838	#if EV_USE_EPOLL
		839	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		840	#endif
		841	#if EV_USE_KQUEUE
		842	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		843	#endif
		844
		845	if (ev_is_active (&sigev))
		846	{
		847	/* default loop */
		848
		849	ev_ref (EV_A);
		850	ev_io_stop (EV_A_ &sigev);
		851	close (sigpipe [0]);
		852	close (sigpipe [1]);
		853
		854	while (pipe (sigpipe))
		855	syserr ("(libev) error creating pipe");
		856
		857	siginit (EV_A);
382	{	858	}
383	ANPENDING *p = pendings + i;
384		859
385	if (p->w)	860	postfork = 0;
		861	}
		862
		863	#if EV_MULTIPLICITY
		864	struct ev_loop *
		865	ev_loop_new (unsigned int flags)
		866	{
		867	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		868
		869	memset (loop, 0, sizeof (struct ev_loop));
		870
		871	loop_init (EV_A_ flags);
		872
		873	if (ev_method (EV_A))
		874	return loop;
		875
		876	return 0;
		877	}
		878
		879	void
		880	ev_loop_destroy (EV_P)
		881	{
		882	loop_destroy (EV_A);
		883	ev_free (loop);
		884	}
		885
		886	void
		887	ev_loop_fork (EV_P)
		888	{
		889	postfork = 1;
		890	}
		891
		892	#endif
		893
		894	#if EV_MULTIPLICITY
		895	struct ev_loop *
		896	#else
		897	int
		898	#endif
		899	ev_default_loop (unsigned int flags)
		900	{
		901	if (sigpipe [0] == sigpipe [1])
		902	if (pipe (sigpipe))
		903	return 0;
		904
		905	if (!default_loop)
		906	{
		907	#if EV_MULTIPLICITY
		908	struct ev_loop *loop = default_loop = &default_loop_struct;
		909	#else
		910	default_loop = 1;
		911	#endif
		912
		913	loop_init (EV_A_ flags);
		914
		915	if (ev_method (EV_A))
386	{	916	{
387	p->w->pending = 0;	917	siginit (EV_A);
388	p->w->cb (p->w, p->events);	918
		919	#ifndef _WIN32
		920	ev_signal_init (&childev, childcb, SIGCHLD);
		921	ev_set_priority (&childev, EV_MAXPRI);
		922	ev_signal_start (EV_A_ &childev);
		923	ev_unref (EV_A); /* child watcher should not keep loop alive */
		924	#endif
389	}	925	}
		926	else
		927	default_loop = 0;
		928	}
		929
		930	return default_loop;
		931	}
		932
		933	void
		934	ev_default_destroy (void)
		935	{
		936	#if EV_MULTIPLICITY
		937	struct ev_loop *loop = default_loop;
		938	#endif
		939
		940	#ifndef _WIN32
		941	ev_ref (EV_A); /* child watcher */
		942	ev_signal_stop (EV_A_ &childev);
		943	#endif
		944
		945	ev_ref (EV_A); /* signal watcher */
		946	ev_io_stop (EV_A_ &sigev);
		947
		948	close (sigpipe [0]); sigpipe [0] = 0;
		949	close (sigpipe [1]); sigpipe [1] = 0;
		950
		951	loop_destroy (EV_A);
		952	}
		953
		954	void
		955	ev_default_fork (void)
		956	{
		957	#if EV_MULTIPLICITY
		958	struct ev_loop *loop = default_loop;
		959	#endif
		960
		961	if (method)
		962	postfork = 1;
		963	}
		964
		965	/*****************************************************************************/
		966
		967	static int
		968	any_pending (EV_P)
		969	{
		970	int pri;
		971
		972	for (pri = NUMPRI; pri--; )
		973	if (pendingcnt [pri])
		974	return 1;
		975
		976	return 0;
		977	}
		978
		979	static void
		980	call_pending (EV_P)
		981	{
		982	int pri;
		983
		984	for (pri = NUMPRI; pri--; )
		985	while (pendingcnt [pri])
		986	{
		987	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		988
		989	if (p->w)
		990	{
		991	p->w->pending = 0;
		992	EV_CB_INVOKE (p->w, p->events);
		993	}
390	}	994	}
391
392	pendingcnt = 0;
393	}	995	}
394		996
395	static void	997	static void
396	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	998	timers_reify (EV_P)
397	{	999	{
398	while (timercnt && timers [0]->at <= now)	1000	while (timercnt && ((WT)timers [0])->at <= mn_now)
399	{	1001	{
400	struct ev_timer *w = timers [0];	1002	struct ev_timer *w = timers [0];
		1003
		1004	assert (("inactive timer on timer heap detected", ev_is_active (w)));
401		1005
402	/* first reschedule or stop timer */	1006	/* first reschedule or stop timer */
403	if (w->repeat)	1007	if (w->repeat)
404	{	1008	{
405	if (w->is_abs)	1009	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
406	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;	1010
407	else
408	w->at = now + w->repeat;	1011	((WT)w)->at += w->repeat;
		1012	if (((WT)w)->at < mn_now)
		1013	((WT)w)->at = mn_now;
409		1014
410	assert (w->at > now);
411
412	downheap (timers, timercnt, 0);	1015	downheap ((WT *)timers, timercnt, 0);
413	}	1016	}
414	else	1017	else
		1018	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1019
		1020	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1021	}
		1022	}
		1023
		1024	#if EV_PERIODICS
		1025	static void
		1026	periodics_reify (EV_P)
		1027	{
		1028	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
		1029	{
		1030	struct ev_periodic *w = periodics [0];
		1031
		1032	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1033
		1034	/* first reschedule or stop timer */
		1035	if (w->reschedule_cb)
415	{	1036	{
416	evtimer_stop (w); /* nonrepeating: stop timer */	1037	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
417	--timercnt; /* maybe pass by reference instead? */	1038	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1039	downheap ((WT *)periodics, periodiccnt, 0);
418	}	1040	}
		1041	else if (w->interval)
		1042	{
		1043	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
		1044	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1045	downheap ((WT *)periodics, periodiccnt, 0);
		1046	}
		1047	else
		1048	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
419		1049
420	event ((struct ev_watcher *)w, EV_TIMEOUT);	1050	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
421	}	1051	}
422	}	1052	}
423		1053
424	static void	1054	static void
425	time_update ()	1055	periodics_reschedule (EV_P)
426	{	1056	{
427	int i;	1057	int i;
		1058
		1059	/* adjust periodics after time jump */
		1060	for (i = 0; i < periodiccnt; ++i)
		1061	{
		1062	struct ev_periodic *w = periodics [i];
		1063
		1064	if (w->reschedule_cb)
		1065	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1066	else if (w->interval)
		1067	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1068	}
		1069
		1070	/* now rebuild the heap */
		1071	for (i = periodiccnt >> 1; i--; )
		1072	downheap ((WT *)periodics, periodiccnt, i);
		1073	}
		1074	#endif
		1075
		1076	inline int
		1077	time_update_monotonic (EV_P)
		1078	{
		1079	mn_now = get_clock ();
		1080
		1081	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1082	{
		1083	ev_rt_now = rtmn_diff + mn_now;
		1084	return 0;
		1085	}
		1086	else
		1087	{
		1088	now_floor = mn_now;
428	ev_now = ev_time ();	1089	ev_rt_now = ev_time ();
429		1090	return 1;
430	if (have_monotonic)
431	{	1091	}
432	ev_tstamp odiff = diff;	1092	}
433		1093
434	/* detecting time jumps is much more difficult */	1094	static void
435	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1095	time_update (EV_P)
		1096	{
		1097	int i;
		1098
		1099	#if EV_USE_MONOTONIC
		1100	if (expect_true (have_monotonic))
		1101	{
		1102	if (time_update_monotonic (EV_A))
436	{	1103	{
437	now = get_clock ();	1104	ev_tstamp odiff = rtmn_diff;
		1105
		1106	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1107	{
438	diff = ev_now - now;	1108	rtmn_diff = ev_rt_now - mn_now;
439		1109
440	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1110	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
441	return; /* all is well */	1111	return; /* all is well */
442		1112
443	ev_now = ev_time ();	1113	ev_rt_now = ev_time ();
		1114	mn_now = get_clock ();
		1115	now_floor = mn_now;
		1116	}
		1117
		1118	# if EV_PERIODICS
		1119	periodics_reschedule (EV_A);
		1120	# endif
		1121	/* no timer adjustment, as the monotonic clock doesn't jump */
		1122	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
444	}	1123	}
		1124	}
		1125	else
		1126	#endif
		1127	{
		1128	ev_rt_now = ev_time ();
445		1129
446	/* time jump detected, reschedule atimers */	1130	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
447	for (i = 0; i < atimercnt; ++i)
448	{	1131	{
449	struct ev_timer *w = atimers [i];	1132	#if EV_PERIODICS
450	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1133	periodics_reschedule (EV_A);
		1134	#endif
		1135
		1136	/* adjust timers. this is easy, as the offset is the same for all */
		1137	for (i = 0; i < timercnt; ++i)
		1138	((WT)timers [i])->at += ev_rt_now - mn_now;
451	}	1139	}
452	}
453	else
454	{
455	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
456	/* time jump detected, adjust rtimers */
457	for (i = 0; i < rtimercnt; ++i)
458	rtimers [i]->at += ev_now - now;
459		1140
460	now = ev_now;	1141	mn_now = ev_rt_now;
461	}	1142	}
462	}	1143	}
463		1144
464	int ev_loop_done;	1145	void
		1146	ev_ref (EV_P)
		1147	{
		1148	++activecnt;
		1149	}
465		1150
		1151	void
		1152	ev_unref (EV_P)
		1153	{
		1154	--activecnt;
		1155	}
		1156
		1157	static int loop_done;
		1158
		1159	void
466	void ev_loop (int flags)	1160	ev_loop (EV_P_ int flags)
467	{	1161	{
468	double block;	1162	double block;
469	ev_loop_done = flags & EVLOOP_ONESHOT;	1163	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
470
471	if (checkcnt)
472	{
473	queue_events (checks, checkcnt, EV_CHECK);
474	call_pending ();
475	}
476		1164
477	do	1165	do
478	{	1166	{
		1167	/* queue check watchers (and execute them) */
		1168	if (expect_false (preparecnt))
		1169	{
		1170	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1171	call_pending (EV_A);
		1172	}
		1173
		1174	/* we might have forked, so reify kernel state if necessary */
		1175	if (expect_false (postfork))
		1176	loop_fork (EV_A);
		1177
479	/* update fd-related kernel structures */	1178	/* update fd-related kernel structures */
480	fd_reify ();	1179	fd_reify (EV_A);
481		1180
482	/* calculate blocking time */	1181	/* calculate blocking time */
		1182
		1183	/* we only need this for !monotonic clock or timers, but as we basically
		1184	always have timers, we just calculate it always */
		1185	#if EV_USE_MONOTONIC
		1186	if (expect_true (have_monotonic))
		1187	time_update_monotonic (EV_A);
		1188	else
		1189	#endif
		1190	{
		1191	ev_rt_now = ev_time ();
		1192	mn_now = ev_rt_now;
		1193	}
		1194
483	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1195	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
484	block = 0.;	1196	block = 0.;
485	else	1197	else
486	{	1198	{
487	block = MAX_BLOCKTIME;	1199	block = MAX_BLOCKTIME;
488		1200
489	if (rtimercnt)	1201	if (timercnt)
490	{	1202	{
491	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1203	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
492	if (block > to) block = to;	1204	if (block > to) block = to;
493	}	1205	}
494		1206
		1207	#if EV_PERIODICS
495	if (atimercnt)	1208	if (periodiccnt)
496	{	1209	{
497	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1210	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
498	if (block > to) block = to;	1211	if (block > to) block = to;
499	}	1212	}
		1213	#endif
500		1214
501	if (block < 0.) block = 0.;	1215	if (block < 0.) block = 0.;
502	}	1216	}
503		1217
504	method_poll (block);	1218	method_poll (EV_A_ block);
505		1219
506	/* update ev_now, do magic */	1220	/* update ev_rt_now, do magic */
507	time_update ();	1221	time_update (EV_A);
508		1222
509	/* queue pending timers and reschedule them */	1223	/* queue pending timers and reschedule them */
510	/* absolute timers first */	1224	timers_reify (EV_A); /* relative timers called last */
511	timers_reify (atimers, atimercnt, ev_now);	1225	#if EV_PERIODICS
512	/* relative timers second */	1226	periodics_reify (EV_A); /* absolute timers called first */
513	timers_reify (rtimers, rtimercnt, now);	1227	#endif
514		1228
515	/* queue idle watchers unless io or timers are pending */	1229	/* queue idle watchers unless io or timers are pending */
516	if (!pendingcnt)	1230	if (idlecnt && !any_pending (EV_A))
517	queue_events (idles, idlecnt, EV_IDLE);	1231	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
518		1232
519	/* queue check and possibly idle watchers */	1233	/* queue check watchers, to be executed first */
		1234	if (checkcnt)
520	queue_events (checks, checkcnt, EV_CHECK);	1235	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
521		1236
522	call_pending ();	1237	call_pending (EV_A);
523	}	1238	}
524	while (!ev_loop_done);	1239	while (activecnt && !loop_done);
		1240
		1241	if (loop_done != 2)
		1242	loop_done = 0;
		1243	}
		1244
		1245	void
		1246	ev_unloop (EV_P_ int how)
		1247	{
		1248	loop_done = how;
525	}	1249	}
526		1250
527	/*****************************************************************************/	1251	/*****************************************************************************/
528		1252
529	static void	1253	inline void
530	wlist_add (struct ev_watcher_list *head, struct ev_watcher_list elem)	1254	wlist_add (WL *head, WL elem)
531	{	1255	{
532	elem->next = *head;	1256	elem->next = *head;
533	*head = elem;	1257	*head = elem;
534	}	1258	}
535		1259
536	static void	1260	inline void
537	wlist_del (struct ev_watcher_list *head, struct ev_watcher_list elem)	1261	wlist_del (WL *head, WL elem)
538	{	1262	{
539	while (*head)	1263	while (*head)
540	{	1264	{
541	if (*head == elem)	1265	if (*head == elem)
542	{	1266	{
546		1270
547	head = &(*head)->next;	1271	head = &(*head)->next;
548	}	1272	}
549	}	1273	}
550		1274
551	static void	1275	inline void
552	ev_start (struct ev_watcher *w, int active)	1276	ev_clear_pending (EV_P_ W w)
553	{	1277	{
		1278	if (w->pending)
		1279	{
		1280	pendings [ABSPRI (w)][w->pending - 1].w = 0;
554	w->pending = 0;	1281	w->pending = 0;
		1282	}
		1283	}
		1284
		1285	inline void
		1286	ev_start (EV_P_ W w, int active)
		1287	{
		1288	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1289	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1290
555	w->active = active;	1291	w->active = active;
		1292	ev_ref (EV_A);
556	}	1293	}
557		1294
558	static void	1295	inline void
559	ev_stop (struct ev_watcher *w)	1296	ev_stop (EV_P_ W w)
560	{	1297	{
561	if (w->pending)	1298	ev_unref (EV_A);
562	pendings [w->pending - 1].w = 0;
563
564	w->active = 0;	1299	w->active = 0;
565	/* nop */
566	}	1300	}
567		1301
568	/*****************************************************************************/	1302	/*****************************************************************************/
569		1303
570	void	1304	void
571	evio_start (struct ev_io *w)	1305	ev_io_start (EV_P_ struct ev_io *w)
572	{	1306	{
		1307	int fd = w->fd;
		1308
573	if (ev_is_active (w))	1309	if (ev_is_active (w))
574	return;	1310	return;
575		1311
576	int fd = w->fd;	1312	assert (("ev_io_start called with negative fd", fd >= 0));
577		1313
578	ev_start ((struct ev_watcher *)w, 1);	1314	ev_start (EV_A_ (W)w, 1);
579	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1315	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
580	wlist_add ((struct ev_watcher_list *)&anfds[fd].head, (struct ev_watcher_list )w);	1316	wlist_add ((WL *)&anfds[fd].head, (WL)w);
581		1317
582	++fdchangecnt;	1318	fd_change (EV_A_ fd);
583	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
584	fdchanges [fdchangecnt - 1] = fd;
585	}	1319	}
586		1320
587	void	1321	void
588	evio_stop (struct ev_io *w)	1322	ev_io_stop (EV_P_ struct ev_io *w)
589	{	1323	{
		1324	ev_clear_pending (EV_A_ (W)w);
590	if (!ev_is_active (w))	1325	if (!ev_is_active (w))
591	return;	1326	return;
592		1327
593	wlist_del ((struct ev_watcher_list *)&anfds[w->fd].head, (struct ev_watcher_list )w);	1328	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
594	ev_stop ((struct ev_watcher *)w);
595		1329
596	++fdchangecnt;	1330	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
597	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	1331	ev_stop (EV_A_ (W)w);
598	fdchanges [fdchangecnt - 1] = w->fd;
599	}
600		1332
		1333	fd_change (EV_A_ w->fd);
		1334	}
		1335
601	void	1336	void
602	evtimer_start (struct ev_timer *w)	1337	ev_timer_start (EV_P_ struct ev_timer *w)
603	{	1338	{
604	if (ev_is_active (w))	1339	if (ev_is_active (w))
605	return;	1340	return;
606		1341
607	if (w->is_abs)	1342	((WT)w)->at += mn_now;
		1343
		1344	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1345
		1346	ev_start (EV_A_ (W)w, ++timercnt);
		1347	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
		1348	timers [timercnt - 1] = w;
		1349	upheap ((WT *)timers, timercnt - 1);
		1350
		1351	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1352	}
		1353
		1354	void
		1355	ev_timer_stop (EV_P_ struct ev_timer *w)
		1356	{
		1357	ev_clear_pending (EV_A_ (W)w);
		1358	if (!ev_is_active (w))
		1359	return;
		1360
		1361	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1362
		1363	if (((W)w)->active < timercnt--)
		1364	{
		1365	timers [((W)w)->active - 1] = timers [timercnt];
		1366	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
608	{	1367	}
609	/* this formula differs from the one in timer_reify becuse we do not round up */	1368
		1369	((WT)w)->at -= mn_now;
		1370
		1371	ev_stop (EV_A_ (W)w);
		1372	}
		1373
		1374	void
		1375	ev_timer_again (EV_P_ struct ev_timer *w)
		1376	{
		1377	if (ev_is_active (w))
		1378	{
610	if (w->repeat)	1379	if (w->repeat)
611	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1380	{
612		1381	((WT)w)->at = mn_now + w->repeat;
613	ev_start ((struct ev_watcher *)w, ++atimercnt);	1382	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
614	array_needsize (atimers, atimermax, atimercnt, );	1383	}
615	atimers [atimercnt - 1] = w;
616	upheap (atimers, atimercnt - 1);
617	}
618	else	1384	else
		1385	ev_timer_stop (EV_A_ w);
619	{	1386	}
620	w->at += now;	1387	else if (w->repeat)
621
622	ev_start ((struct ev_watcher *)w, ++rtimercnt);
623	array_needsize (rtimers, rtimermax, rtimercnt, );
624	rtimers [rtimercnt - 1] = w;
625	upheap (rtimers, rtimercnt - 1);
626	}	1388	{
627		1389	w->at = w->repeat;
		1390	ev_timer_start (EV_A_ w);
		1391	}
628	}	1392	}
629		1393
		1394	#if EV_PERIODICS
630	void	1395	void
631	evtimer_stop (struct ev_timer *w)	1396	ev_periodic_start (EV_P_ struct ev_periodic *w)
632	{	1397	{
		1398	if (ev_is_active (w))
		1399	return;
		1400
		1401	if (w->reschedule_cb)
		1402	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1403	else if (w->interval)
		1404	{
		1405	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1406	/* this formula differs from the one in periodic_reify because we do not always round up */
		1407	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1408	}
		1409
		1410	ev_start (EV_A_ (W)w, ++periodiccnt);
		1411	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
		1412	periodics [periodiccnt - 1] = w;
		1413	upheap ((WT *)periodics, periodiccnt - 1);
		1414
		1415	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1416	}
		1417
		1418	void
		1419	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1420	{
		1421	ev_clear_pending (EV_A_ (W)w);
633	if (!ev_is_active (w))	1422	if (!ev_is_active (w))
634	return;	1423	return;
635		1424
636	if (w->is_abs)	1425	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
637	{	1426
638	if (w->active < atimercnt--)	1427	if (((W)w)->active < periodiccnt--)
639	{
640	atimers [w->active - 1] = atimers [atimercnt];
641	downheap (atimers, atimercnt, w->active - 1);
642	}
643	}	1428	{
644	else	1429	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1430	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
645	{	1431	}
646	if (w->active < rtimercnt--)
647	{
648	rtimers [w->active - 1] = rtimers [rtimercnt];
649	downheap (rtimers, rtimercnt, w->active - 1);
650	}
651	}
652		1432
653	ev_stop ((struct ev_watcher *)w);	1433	ev_stop (EV_A_ (W)w);
654	}	1434	}
655		1435
656	void	1436	void
657	evsignal_start (struct ev_signal *w)	1437	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1438	{
		1439	/* TODO: use adjustheap and recalculation */
		1440	ev_periodic_stop (EV_A_ w);
		1441	ev_periodic_start (EV_A_ w);
		1442	}
		1443	#endif
		1444
		1445	void
		1446	ev_idle_start (EV_P_ struct ev_idle *w)
658	{	1447	{
659	if (ev_is_active (w))	1448	if (ev_is_active (w))
660	return;	1449	return;
661		1450
662	ev_start ((struct ev_watcher *)w, 1);	1451	ev_start (EV_A_ (W)w, ++idlecnt);
		1452	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1453	idles [idlecnt - 1] = w;
		1454	}
		1455
		1456	void
		1457	ev_idle_stop (EV_P_ struct ev_idle *w)
		1458	{
		1459	ev_clear_pending (EV_A_ (W)w);
		1460	if (!ev_is_active (w))
		1461	return;
		1462
		1463	idles [((W)w)->active - 1] = idles [--idlecnt];
		1464	ev_stop (EV_A_ (W)w);
		1465	}
		1466
		1467	void
		1468	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1469	{
		1470	if (ev_is_active (w))
		1471	return;
		1472
		1473	ev_start (EV_A_ (W)w, ++preparecnt);
		1474	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1475	prepares [preparecnt - 1] = w;
		1476	}
		1477
		1478	void
		1479	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1480	{
		1481	ev_clear_pending (EV_A_ (W)w);
		1482	if (!ev_is_active (w))
		1483	return;
		1484
		1485	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1486	ev_stop (EV_A_ (W)w);
		1487	}
		1488
		1489	void
		1490	ev_check_start (EV_P_ struct ev_check *w)
		1491	{
		1492	if (ev_is_active (w))
		1493	return;
		1494
		1495	ev_start (EV_A_ (W)w, ++checkcnt);
		1496	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1497	checks [checkcnt - 1] = w;
		1498	}
		1499
		1500	void
		1501	ev_check_stop (EV_P_ struct ev_check *w)
		1502	{
		1503	ev_clear_pending (EV_A_ (W)w);
		1504	if (!ev_is_active (w))
		1505	return;
		1506
		1507	checks [((W)w)->active - 1] = checks [--checkcnt];
		1508	ev_stop (EV_A_ (W)w);
		1509	}
		1510
		1511	#ifndef SA_RESTART
		1512	# define SA_RESTART 0
		1513	#endif
		1514
		1515	void
		1516	ev_signal_start (EV_P_ struct ev_signal *w)
		1517	{
		1518	#if EV_MULTIPLICITY
		1519	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1520	#endif
		1521	if (ev_is_active (w))
		1522	return;
		1523
		1524	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1525
		1526	ev_start (EV_A_ (W)w, 1);
663	array_needsize (signals, signalmax, w->signum, signals_init);	1527	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
664	wlist_add ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	1528	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
665		1529
666	if (!w->next)	1530	if (!((WL)w)->next)
667	{	1531	{
		1532	#if _WIN32
		1533	signal (w->signum, sighandler);
		1534	#else
668	struct sigaction sa;	1535	struct sigaction sa;
669	sa.sa_handler = sighandler;	1536	sa.sa_handler = sighandler;
670	sigfillset (&sa.sa_mask);	1537	sigfillset (&sa.sa_mask);
671	sa.sa_flags = 0;	1538	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
672	sigaction (w->signum, &sa, 0);	1539	sigaction (w->signum, &sa, 0);
		1540	#endif
673	}	1541	}
674	}	1542	}
675		1543
676	void	1544	void
677	evsignal_stop (struct ev_signal *w)	1545	ev_signal_stop (EV_P_ struct ev_signal *w)
678	{	1546	{
		1547	ev_clear_pending (EV_A_ (W)w);
679	if (!ev_is_active (w))	1548	if (!ev_is_active (w))
680	return;	1549	return;
681		1550
682	wlist_del ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	1551	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
683	ev_stop ((struct ev_watcher *)w);	1552	ev_stop (EV_A_ (W)w);
684		1553
685	if (!signals [w->signum - 1].head)	1554	if (!signals [w->signum - 1].head)
686	signal (w->signum, SIG_DFL);	1555	signal (w->signum, SIG_DFL);
687	}	1556	}
688		1557
689	void evidle_start (struct ev_idle *w)	1558	void
		1559	ev_child_start (EV_P_ struct ev_child *w)
690	{	1560	{
		1561	#if EV_MULTIPLICITY
		1562	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1563	#endif
691	if (ev_is_active (w))	1564	if (ev_is_active (w))
692	return;	1565	return;
693		1566
694	ev_start ((struct ev_watcher *)w, ++idlecnt);	1567	ev_start (EV_A_ (W)w, 1);
695	array_needsize (idles, idlemax, idlecnt, );	1568	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
696	idles [idlecnt - 1] = w;
697	}	1569	}
698		1570
699	void evidle_stop (struct ev_idle *w)	1571	void
		1572	ev_child_stop (EV_P_ struct ev_child *w)
700	{	1573	{
701	idles [w->active - 1] = idles [--idlecnt];	1574	ev_clear_pending (EV_A_ (W)w);
702	ev_stop ((struct ev_watcher *)w);
703	}
704
705	void evcheck_start (struct ev_check *w)
706	{
707	if (ev_is_active (w))	1575	if (!ev_is_active (w))
708	return;	1576	return;
709		1577
710	ev_start ((struct ev_watcher *)w, ++checkcnt);	1578	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
711	array_needsize (checks, checkmax, checkcnt, );	1579	ev_stop (EV_A_ (W)w);
712	checks [checkcnt - 1] = w;
713	}
714
715	void evcheck_stop (struct ev_check *w)
716	{
717	checks [w->active - 1] = checks [--checkcnt];
718	ev_stop ((struct ev_watcher *)w);
719	}	1580	}
720		1581
721	/*****************************************************************************/	1582	/*****************************************************************************/
722	#if 1
723		1583
724	static void	1584	struct ev_once
725	sin_cb (struct ev_io *w, int revents)
726	{	1585	{
727	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
728	}
729
730	static void
731	ocb (struct ev_timer *w, int revents)
732	{
733	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
734	evtimer_stop (w);
735	evtimer_start (w);
736	}
737
738	static void
739	scb (struct ev_signal *w, int revents)
740	{
741	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
742	}
743
744	static void
745	gcb (struct ev_signal *w, int revents)
746	{
747	fprintf (stderr, "generic %x\n", revents);
748	}
749
750	int main (void)
751	{
752	struct ev_io sin;	1586	struct ev_io io;
753
754	ev_init (0);
755
756	evw_init (&sin, sin_cb, 55);
757	evio_set (&sin, 0, EV_READ);
758	evio_start (&sin);
759
760	struct ev_timer t[10000];
761
762	#if 0
763	int i;
764	for (i = 0; i < 10000; ++i)
765	{
766	struct ev_timer *w = t + i;
767	evw_init (w, ocb, i);
768	evtimer_set_abs (w, drand48 (), 0.99775533);
769	evtimer_start (w);
770	if (drand48 () < 0.5)
771	evtimer_stop (w);
772	}
773	#endif
774
775	struct ev_timer t1;	1587	struct ev_timer to;
776	evw_init (&t1, ocb, 0);	1588	void (cb)(int revents, void arg);
777	evtimer_set_abs (&t1, 5, 10);	1589	void *arg;
778	evtimer_start (&t1);	1590	};
779		1591
780	struct ev_signal sig;	1592	static void
781	evw_init (&sig, scb, 65535);	1593	once_cb (EV_P_ struct ev_once *once, int revents)
782	evsignal_set (&sig, SIGQUIT);	1594	{
783	evsignal_start (&sig);	1595	void (cb)(int revents, void arg) = once->cb;
		1596	void *arg = once->arg;
784		1597
785	struct ev_check cw;	1598	ev_io_stop (EV_A_ &once->io);
786	evw_init (&cw, gcb, 0);	1599	ev_timer_stop (EV_A_ &once->to);
787	evcheck_start (&cw);	1600	ev_free (once);
788		1601
789	struct ev_idle iw;	1602	cb (revents, arg);
790	evw_init (&iw, gcb, 0);
791	evidle_start (&iw);
792
793	ev_loop (0);
794
795	return 0;
796	}	1603	}
797		1604
798	#endif	1605	static void
		1606	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1607	{
		1608	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1609	}
799		1610
		1611	static void
		1612	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1613	{
		1614	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1615	}
800		1616
		1617	void
		1618	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1619	{
		1620	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
801		1621
		1622	if (!once)
		1623	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1624	else
		1625	{
		1626	once->cb = cb;
		1627	once->arg = arg;
802		1628
		1629	ev_init (&once->io, once_cb_io);
		1630	if (fd >= 0)
		1631	{
		1632	ev_io_set (&once->io, fd, events);
		1633	ev_io_start (EV_A_ &once->io);
		1634	}
		1635
		1636	ev_init (&once->to, once_cb_to);
		1637	if (timeout >= 0.)
		1638	{
		1639	ev_timer_set (&once->to, timeout, 0.);
		1640	ev_timer_start (EV_A_ &once->to);
		1641	}
		1642	}
		1643	}
		1644
		1645	#ifdef __cplusplus
		1646	}
		1647	#endif
		1648

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Comparing libev/ev.c (file contents): Revision 1.9 by root, Wed Oct 31 07:24:17 2007 UTC vs. Revision 1.114 by root, Mon Nov 12 20:03:39 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.9 by root, Wed Oct 31 07:24:17 2007 UTC vs.
Revision 1.114 by root, Mon Nov 12 20:03:39 2007 UTC