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

Comparing libev/ev.c (file contents):
Revision 1.10 by root, Wed Oct 31 07:36:03 2007 UTC vs.
Revision 1.106 by root, Mon Nov 12 01:07:50 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
14	#ifndef HAVE_MONOTONIC	78	#include <signal.h>
15	# ifdef CLOCK_MONOTONIC	79
16	# define HAVE_MONOTONIC 1	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
17	# endif	89	# endif
18	#endif	90	#endif
19		91
		92	/**/
		93
		94	#ifndef EV_USE_MONOTONIC
		95	# define EV_USE_MONOTONIC 1
		96	#endif
		97
20	#ifndef HAVE_SELECT	98	#ifndef EV_USE_SELECT
21	# define HAVE_SELECT 1	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
22	#endif	108	# endif
		109	#endif
23		110
24	#ifndef HAVE_EPOLL	111	#ifndef EV_USE_EPOLL
25	# define HAVE_EPOLL 0	112	# define EV_USE_EPOLL 0
26	#endif	113	#endif
27		114
		115	#ifndef EV_USE_KQUEUE
		116	# define EV_USE_KQUEUE 0
		117	#endif
		118
28	#ifndef HAVE_REALTIME	119	#ifndef EV_USE_REALTIME
29	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	120	# define EV_USE_REALTIME 1
30	#endif	121	#endif
		122
		123	/**/
		124
		125	/* darwin simply cnanot be helped */
		126	#ifdef __APPLE__
		127	# undef EV_USE_POLL
		128	# undef EV_USE_KQUEUE
		129	#endif
		130
		131	#ifndef CLOCK_MONOTONIC
		132	# undef EV_USE_MONOTONIC
		133	# define EV_USE_MONOTONIC 0
		134	#endif
		135
		136	#ifndef CLOCK_REALTIME
		137	# undef EV_USE_REALTIME
		138	# define EV_USE_REALTIME 0
		139	#endif
		140
		141	#if EV_SELECT_IS_WINSOCKET
		142	# include <winsock.h>
		143	#endif
		144
		145	/**/
31		146
32	#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) */
33	#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 */
34		151
		152	#ifdef EV_H
		153	# include EV_H
		154	#else
35	#include "ev.h"	155	# include "ev.h"
		156	#endif
36		157
37	struct ev_watcher {	158	#if __GNUC__ >= 3
38	EV_WATCHER (ev_watcher);	159	# define expect(expr,value) __builtin_expect ((expr),(value))
39	};	160	# define inline inline
		161	#else
		162	# define expect(expr,value) (expr)
		163	# define inline static
		164	#endif
40		165
41	struct ev_watcher_list {	166	#define expect_false(expr) expect ((expr) != 0, 0)
42	EV_WATCHER_LIST (ev_watcher_list);	167	#define expect_true(expr) expect ((expr) != 0, 1)
43	};	168
		169	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		170	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		171
		172	#define EMPTY /* required for microsofts broken pseudo-c compiler */
44		173
45	typedef struct ev_watcher *W;	174	typedef struct ev_watcher *W;
46	typedef struct ev_watcher_list *WL;	175	typedef struct ev_watcher_list *WL;
		176	typedef struct ev_watcher_time *WT;
47		177
48	static ev_tstamp now, diff; /* monotonic clock */	178	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		179
		180	#ifdef _WIN32
		181	# include "ev_win32.c"
		182	#endif
		183
		184	/*****************************************************************************/
		185
		186	static void (syserr_cb)(const char msg);
		187
		188	void ev_set_syserr_cb (void (cb)(const char msg))
		189	{
		190	syserr_cb = cb;
		191	}
		192
		193	static void
		194	syserr (const char *msg)
		195	{
		196	if (!msg)
		197	msg = "(libev) system error";
		198
		199	if (syserr_cb)
		200	syserr_cb (msg);
		201	else
		202	{
		203	perror (msg);
		204	abort ();
		205	}
		206	}
		207
		208	static void (alloc)(void *ptr, long size);
		209
		210	void ev_set_allocator (void (cb)(void *ptr, long size))
		211	{
		212	alloc = cb;
		213	}
		214
		215	static void *
		216	ev_realloc (void *ptr, long size)
		217	{
		218	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		219
		220	if (!ptr && size)
		221	{
		222	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		223	abort ();
		224	}
		225
		226	return ptr;
		227	}
		228
		229	#define ev_malloc(size) ev_realloc (0, (size))
		230	#define ev_free(ptr) ev_realloc ((ptr), 0)
		231
		232	/*****************************************************************************/
		233
		234	typedef struct
		235	{
		236	WL head;
		237	unsigned char events;
		238	unsigned char reify;
		239	#if EV_SELECT_IS_WINSOCKET
		240	SOCKET handle;
		241	#endif
		242	} ANFD;
		243
		244	typedef struct
		245	{
		246	W w;
		247	int events;
		248	} ANPENDING;
		249
		250	#if EV_MULTIPLICITY
		251
		252	struct ev_loop
		253	{
		254	ev_tstamp ev_rt_now;
		255	#define ev_rt_now ((loop)->ev_rt_now)
		256	#define VAR(name,decl) decl;
		257	#include "ev_vars.h"
		258	#undef VAR
		259	};
		260	#include "ev_wrap.h"
		261
		262	struct ev_loop default_loop_struct;
		263	static struct ev_loop *default_loop;
		264
		265	#else
		266
49	ev_tstamp ev_now;	267	ev_tstamp ev_rt_now;
50	int ev_method;	268	#define VAR(name,decl) static decl;
		269	#include "ev_vars.h"
		270	#undef VAR
51		271
52	static int have_monotonic; /* runtime */	272	static int default_loop;
53		273
54	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	274	#endif
55	static void (*method_modify)(int fd, int oev, int nev);
56	static void (*method_poll)(ev_tstamp timeout);
57		275
58	/*****************************************************************************/	276	/*****************************************************************************/
59		277
60	ev_tstamp	278	ev_tstamp
61	ev_time (void)	279	ev_time (void)
62	{	280	{
63	#if HAVE_REALTIME	281	#if EV_USE_REALTIME
64	struct timespec ts;	282	struct timespec ts;
65	clock_gettime (CLOCK_REALTIME, &ts);	283	clock_gettime (CLOCK_REALTIME, &ts);
66	return ts.tv_sec + ts.tv_nsec * 1e-9;	284	return ts.tv_sec + ts.tv_nsec * 1e-9;
67	#else	285	#else
68	struct timeval tv;	286	struct timeval tv;
69	gettimeofday (&tv, 0);	287	gettimeofday (&tv, 0);
70	return tv.tv_sec + tv.tv_usec * 1e-6;	288	return tv.tv_sec + tv.tv_usec * 1e-6;
71	#endif	289	#endif
72	}	290	}
73		291
74	static ev_tstamp	292	inline ev_tstamp
75	get_clock (void)	293	get_clock (void)
76	{	294	{
77	#if HAVE_MONOTONIC	295	#if EV_USE_MONOTONIC
78	if (have_monotonic)	296	if (expect_true (have_monotonic))
79	{	297	{
80	struct timespec ts;	298	struct timespec ts;
81	clock_gettime (CLOCK_MONOTONIC, &ts);	299	clock_gettime (CLOCK_MONOTONIC, &ts);
82	return ts.tv_sec + ts.tv_nsec * 1e-9;	300	return ts.tv_sec + ts.tv_nsec * 1e-9;
83	}	301	}
84	#endif	302	#endif
85		303
86	return ev_time ();	304	return ev_time ();
87	}	305	}
88		306
		307	#if EV_MULTIPLICITY
		308	ev_tstamp
		309	ev_now (EV_P)
		310	{
		311	return ev_rt_now;
		312	}
		313	#endif
		314
		315	#define array_roundsize(type,n) ((n) \| 4 & ~3)
		316
89	#define array_needsize(base,cur,cnt,init) \	317	#define array_needsize(type,base,cur,cnt,init) \
90	if ((cnt) > cur) \	318	if (expect_false ((cnt) > cur)) \
91	{ \	319	{ \
92	int newcnt = cur ? cur << 1 : 16; \	320	int newcnt = cur; \
93	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	321	do \
		322	{ \
		323	newcnt = array_roundsize (type, newcnt << 1); \
		324	} \
		325	while ((cnt) > newcnt); \
		326	\
94	base = realloc (base, sizeof (base) (newcnt)); \	327	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
95	init (base + cur, newcnt - cur); \	328	init (base + cur, newcnt - cur); \
96	cur = newcnt; \	329	cur = newcnt; \
97	}	330	}
		331
		332	#define array_slim(type,stem) \
		333	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		334	{ \
		335	stem ## max = array_roundsize (stem ## cnt >> 1); \
		336	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
		337	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		338	}
		339
		340	#define array_free(stem, idx) \
		341	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
98		342
99	/*****************************************************************************/	343	/*****************************************************************************/
100		344
101	typedef struct
102	{
103	struct ev_io *head;
104	unsigned char wev, rev; /* want, received event set */
105	} ANFD;
106
107	static ANFD *anfds;
108	static int anfdmax;
109
110	static int *fdchanges;
111	static int fdchangemax, fdchangecnt;
112
113	static void	345	static void
114	anfds_init (ANFD *base, int count)	346	anfds_init (ANFD *base, int count)
115	{	347	{
116	while (count--)	348	while (count--)
117	{	349	{
118	base->head = 0;	350	base->head = 0;
119	base->wev = base->rev = EV_NONE;	351	base->events = EV_NONE;
		352	base->reify = 0;
		353
120	++base;	354	++base;
121	}	355	}
122	}	356	}
123		357
124	typedef struct	358	void
		359	ev_feed_event (EV_P_ void *w, int revents)
125	{	360	{
126	W w;	361	W w_ = (W)w;
127	int events;
128	} ANPENDING;
129		362
130	static ANPENDING *pendings;	363	if (w_->pending)
131	static int pendingmax, pendingcnt;	364	{
		365	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		366	return;
		367	}
132		368
133	static void
134	event (W w, int events)
135	{
136	w->pending = ++pendingcnt;	369	w_->pending = ++pendingcnt [ABSPRI (w_)];
137	array_needsize (pendings, pendingmax, pendingcnt, );	370	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
138	pendings [pendingcnt - 1].w = w;	371	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
139	pendings [pendingcnt - 1].events = events;	372	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
140	}	373	}
141		374
142	static void	375	static void
		376	queue_events (EV_P_ W *events, int eventcnt, int type)
		377	{
		378	int i;
		379
		380	for (i = 0; i < eventcnt; ++i)
		381	ev_feed_event (EV_A_ events [i], type);
		382	}
		383
		384	inline void
143	fd_event (int fd, int events)	385	fd_event (EV_P_ int fd, int revents)
144	{	386	{
145	ANFD *anfd = anfds + fd;	387	ANFD *anfd = anfds + fd;
146	struct ev_io *w;	388	struct ev_io *w;
147		389
148	for (w = anfd->head; w; w = w->next)	390	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
149	{	391	{
150	int ev = w->events & events;	392	int ev = w->events & revents;
151		393
152	if (ev)	394	if (ev)
153	event ((W)w, ev);	395	ev_feed_event (EV_A_ (W)w, ev);
154	}	396	}
155	}	397	}
156		398
157	static void	399	void
158	queue_events (W *events, int eventcnt, int type)	400	ev_feed_fd_event (EV_P_ int fd, int revents)
159	{	401	{
160	int i;	402	fd_event (EV_A_ fd, revents);
161
162	for (i = 0; i < eventcnt; ++i)
163	event (events [i], type);
164	}	403	}
165		404
166	/*****************************************************************************/	405	/*****************************************************************************/
167		406
168	static struct ev_timer **atimers;
169	static int atimermax, atimercnt;
170
171	static struct ev_timer **rtimers;
172	static int rtimermax, rtimercnt;
173
174	static void	407	static void
175	upheap (struct ev_timer **timers, int k)	408	fd_reify (EV_P)
176	{
177	struct ev_timer *w = timers [k];
178
179	while (k && timers [k >> 1]->at > w->at)
180	{
181	timers [k] = timers [k >> 1];
182	timers [k]->active = k + 1;
183	k >>= 1;
184	}
185
186	timers [k] = w;
187	timers [k]->active = k + 1;
188
189	}
190
191	static void
192	downheap (struct ev_timer **timers, int N, int k)
193	{
194	struct ev_timer *w = timers [k];
195
196	while (k < (N >> 1))
197	{
198	int j = k << 1;
199
200	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
201	++j;
202
203	if (w->at <= timers [j]->at)
204	break;
205
206	timers [k] = timers [j];
207	timers [k]->active = k + 1;
208	k = j;
209	}
210
211	timers [k] = w;
212	timers [k]->active = k + 1;
213	}
214
215	/*****************************************************************************/
216
217	typedef struct
218	{
219	struct ev_signal *head;
220	sig_atomic_t gotsig;
221	} ANSIG;
222
223	static ANSIG *signals;
224	static int signalmax;
225
226	static int sigpipe [2];
227	static sig_atomic_t gotsig;
228	static struct ev_io sigev;
229
230	static void
231	signals_init (ANSIG *base, int count)
232	{
233	while (count--)
234	{
235	base->head = 0;
236	base->gotsig = 0;
237	++base;
238	}
239	}
240
241	static void
242	sighandler (int signum)
243	{
244	signals [signum - 1].gotsig = 1;
245
246	if (!gotsig)
247	{
248	gotsig = 1;
249	write (sigpipe [1], &gotsig, 1);
250	}
251	}
252
253	static void
254	sigcb (struct ev_io *iow, int revents)
255	{
256	struct ev_signal *w;
257	int sig;
258
259	gotsig = 0;
260	read (sigpipe [0], &revents, 1);
261
262	for (sig = signalmax; sig--; )
263	if (signals [sig].gotsig)
264	{
265	signals [sig].gotsig = 0;
266
267	for (w = signals [sig].head; w; w = w->next)
268	event ((W)w, EV_SIGNAL);
269	}
270	}
271
272	static void
273	siginit (void)
274	{
275	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
276	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
277
278	/* rather than sort out wether we really need nb, set it */
279	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
280	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
281
282	evio_set (&sigev, sigpipe [0], EV_READ);
283	evio_start (&sigev);
284	}
285
286	/*****************************************************************************/
287
288	static struct ev_idle **idles;
289	static int idlemax, idlecnt;
290
291	static struct ev_check **checks;
292	static int checkmax, checkcnt;
293
294	/*****************************************************************************/
295
296	#if HAVE_EPOLL
297	# include "ev_epoll.c"
298	#endif
299	#if HAVE_SELECT
300	# include "ev_select.c"
301	#endif
302
303	int ev_init (int flags)
304	{
305	#if HAVE_MONOTONIC
306	{
307	struct timespec ts;
308	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
309	have_monotonic = 1;
310	}
311	#endif
312
313	ev_now = ev_time ();
314	now = get_clock ();
315	diff = ev_now - now;
316
317	if (pipe (sigpipe))
318	return 0;
319
320	ev_method = EVMETHOD_NONE;
321	#if HAVE_EPOLL
322	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
323	#endif
324	#if HAVE_SELECT
325	if (ev_method == EVMETHOD_NONE) select_init (flags);
326	#endif
327
328	if (ev_method)
329	{
330	evw_init (&sigev, sigcb, 0);
331	siginit ();
332	}
333
334	return ev_method;
335	}
336
337	/*****************************************************************************/
338
339	void ev_prefork (void)
340	{
341	}
342
343	void ev_postfork_parent (void)
344	{
345	}
346
347	void ev_postfork_child (void)
348	{
349	#if HAVE_EPOLL
350	if (ev_method == EVMETHOD_EPOLL)
351	epoll_postfork_child ();
352	#endif
353
354	evio_stop (&sigev);
355	close (sigpipe [0]);
356	close (sigpipe [1]);
357	pipe (sigpipe);
358	siginit ();
359	}
360
361	/*****************************************************************************/
362
363	static void
364	fd_reify (void)
365	{	409	{
366	int i;	410	int i;
367		411
368	for (i = 0; i < fdchangecnt; ++i)	412	for (i = 0; i < fdchangecnt; ++i)
369	{	413	{
370	int fd = fdchanges [i];	414	int fd = fdchanges [i];
371	ANFD *anfd = anfds + fd;	415	ANFD *anfd = anfds + fd;
372	struct ev_io *w;	416	struct ev_io *w;
373		417
374	int wev = 0;	418	int events = 0;
375		419
376	for (w = anfd->head; w; w = w->next)	420	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
377	wev \|= w->events;	421	events \|= w->events;
378		422
379	if (anfd->wev != wev)	423	#if EV_SELECT_IS_WINSOCKET
		424	if (events)
380	{	425	{
381	method_modify (fd, anfd->wev, wev);	426	unsigned long argp;
382	anfd->wev = wev;	427	anfd->handle = _get_osfhandle (fd);
		428	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
383	}	429	}
		430	#endif
		431
		432	anfd->reify = 0;
		433
		434	method_modify (EV_A_ fd, anfd->events, events);
		435	anfd->events = events;
384	}	436	}
385		437
386	fdchangecnt = 0;	438	fdchangecnt = 0;
387	}	439	}
388		440
389	static void	441	static void
390	call_pending ()	442	fd_change (EV_P_ int fd)
		443	{
		444	if (anfds [fd].reify)
		445	return;
		446
		447	anfds [fd].reify = 1;
		448
		449	++fdchangecnt;
		450	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		451	fdchanges [fdchangecnt - 1] = fd;
		452	}
		453
		454	static void
		455	fd_kill (EV_P_ int fd)
		456	{
		457	struct ev_io *w;
		458
		459	while ((w = (struct ev_io *)anfds [fd].head))
		460	{
		461	ev_io_stop (EV_A_ w);
		462	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		463	}
		464	}
		465
		466	static int
		467	fd_valid (int fd)
		468	{
		469	#ifdef _WIN32
		470	return _get_osfhandle (fd) != -1;
		471	#else
		472	return fcntl (fd, F_GETFD) != -1;
		473	#endif
		474	}
		475
		476	/* called on EBADF to verify fds */
		477	static void
		478	fd_ebadf (EV_P)
		479	{
		480	int fd;
		481
		482	for (fd = 0; fd < anfdmax; ++fd)
		483	if (anfds [fd].events)
		484	if (!fd_valid (fd) == -1 && errno == EBADF)
		485	fd_kill (EV_A_ fd);
		486	}
		487
		488	/* called on ENOMEM in select/poll to kill some fds and retry */
		489	static void
		490	fd_enomem (EV_P)
		491	{
		492	int fd;
		493
		494	for (fd = anfdmax; fd--; )
		495	if (anfds [fd].events)
		496	{
		497	fd_kill (EV_A_ fd);
		498	return;
		499	}
		500	}
		501
		502	/* usually called after fork if method needs to re-arm all fds from scratch */
		503	static void
		504	fd_rearm_all (EV_P)
		505	{
		506	int fd;
		507
		508	/* this should be highly optimised to not do anything but set a flag */
		509	for (fd = 0; fd < anfdmax; ++fd)
		510	if (anfds [fd].events)
		511	{
		512	anfds [fd].events = 0;
		513	fd_change (EV_A_ fd);
		514	}
		515	}
		516
		517	/*****************************************************************************/
		518
		519	static void
		520	upheap (WT *heap, int k)
		521	{
		522	WT w = heap [k];
		523
		524	while (k && heap [k >> 1]->at > w->at)
		525	{
		526	heap [k] = heap [k >> 1];
		527	((W)heap [k])->active = k + 1;
		528	k >>= 1;
		529	}
		530
		531	heap [k] = w;
		532	((W)heap [k])->active = k + 1;
		533
		534	}
		535
		536	static void
		537	downheap (WT *heap, int N, int k)
		538	{
		539	WT w = heap [k];
		540
		541	while (k < (N >> 1))
		542	{
		543	int j = k << 1;
		544
		545	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		546	++j;
		547
		548	if (w->at <= heap [j]->at)
		549	break;
		550
		551	heap [k] = heap [j];
		552	((W)heap [k])->active = k + 1;
		553	k = j;
		554	}
		555
		556	heap [k] = w;
		557	((W)heap [k])->active = k + 1;
		558	}
		559
		560	inline void
		561	adjustheap (WT *heap, int N, int k)
		562	{
		563	upheap (heap, k);
		564	downheap (heap, N, k);
		565	}
		566
		567	/*****************************************************************************/
		568
		569	typedef struct
		570	{
		571	WL head;
		572	sig_atomic_t volatile gotsig;
		573	} ANSIG;
		574
		575	static ANSIG *signals;
		576	static int signalmax;
		577
		578	static int sigpipe [2];
		579	static sig_atomic_t volatile gotsig;
		580	static struct ev_io sigev;
		581
		582	static void
		583	signals_init (ANSIG *base, int count)
		584	{
		585	while (count--)
		586	{
		587	base->head = 0;
		588	base->gotsig = 0;
		589
		590	++base;
		591	}
		592	}
		593
		594	static void
		595	sighandler (int signum)
		596	{
		597	#if _WIN32
		598	signal (signum, sighandler);
		599	#endif
		600
		601	signals [signum - 1].gotsig = 1;
		602
		603	if (!gotsig)
		604	{
		605	int old_errno = errno;
		606	gotsig = 1;
		607	write (sigpipe [1], &signum, 1);
		608	errno = old_errno;
		609	}
		610	}
		611
		612	void
		613	ev_feed_signal_event (EV_P_ int signum)
		614	{
		615	WL w;
		616
		617	#if EV_MULTIPLICITY
		618	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		619	#endif
		620
		621	--signum;
		622
		623	if (signum < 0 \|\| signum >= signalmax)
		624	return;
		625
		626	signals [signum].gotsig = 0;
		627
		628	for (w = signals [signum].head; w; w = w->next)
		629	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		630	}
		631
		632	static void
		633	sigcb (EV_P_ struct ev_io *iow, int revents)
		634	{
		635	int signum;
		636
		637	read (sigpipe [0], &revents, 1);
		638	gotsig = 0;
		639
		640	for (signum = signalmax; signum--; )
		641	if (signals [signum].gotsig)
		642	ev_feed_signal_event (EV_A_ signum + 1);
		643	}
		644
		645	inline void
		646	fd_intern (int fd)
		647	{
		648	#ifdef _WIN32
		649	int arg = 1;
		650	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		651	#else
		652	fcntl (fd, F_SETFD, FD_CLOEXEC);
		653	fcntl (fd, F_SETFL, O_NONBLOCK);
		654	#endif
		655	}
		656
		657	static void
		658	siginit (EV_P)
		659	{
		660	fd_intern (sigpipe [0]);
		661	fd_intern (sigpipe [1]);
		662
		663	ev_io_set (&sigev, sigpipe [0], EV_READ);
		664	ev_io_start (EV_A_ &sigev);
		665	ev_unref (EV_A); /* child watcher should not keep loop alive */
		666	}
		667
		668	/*****************************************************************************/
		669
		670	static struct ev_child *childs [PID_HASHSIZE];
		671
		672	#ifndef _WIN32
		673
		674	static struct ev_signal childev;
		675
		676	#ifndef WCONTINUED
		677	# define WCONTINUED 0
		678	#endif
		679
		680	static void
		681	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		682	{
		683	struct ev_child *w;
		684
		685	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		686	if (w->pid == pid \|\| !w->pid)
		687	{
		688	ev_priority (w) = ev_priority (sw); /* need to do it now */
		689	w->rpid = pid;
		690	w->rstatus = status;
		691	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		692	}
		693	}
		694
		695	static void
		696	childcb (EV_P_ struct ev_signal *sw, int revents)
		697	{
		698	int pid, status;
		699
		700	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		701	{
		702	/* make sure we are called again until all childs have been reaped */
		703	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		704
		705	child_reap (EV_A_ sw, pid, pid, status);
		706	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		707	}
		708	}
		709
		710	#endif
		711
		712	/*****************************************************************************/
		713
		714	#if EV_USE_KQUEUE
		715	# include "ev_kqueue.c"
		716	#endif
		717	#if EV_USE_EPOLL
		718	# include "ev_epoll.c"
		719	#endif
		720	#if EV_USE_POLL
		721	# include "ev_poll.c"
		722	#endif
		723	#if EV_USE_SELECT
		724	# include "ev_select.c"
		725	#endif
		726
		727	int
		728	ev_version_major (void)
		729	{
		730	return EV_VERSION_MAJOR;
		731	}
		732
		733	int
		734	ev_version_minor (void)
		735	{
		736	return EV_VERSION_MINOR;
		737	}
		738
		739	/* return true if we are running with elevated privileges and should ignore env variables */
		740	static int
		741	enable_secure (void)
		742	{
		743	#ifdef _WIN32
		744	return 0;
		745	#else
		746	return getuid () != geteuid ()
		747	\|\| getgid () != getegid ();
		748	#endif
		749	}
		750
		751	int
		752	ev_method (EV_P)
		753	{
		754	return method;
		755	}
		756
		757	static void
		758	loop_init (EV_P_ int methods)
		759	{
		760	if (!method)
		761	{
		762	#if EV_USE_MONOTONIC
		763	{
		764	struct timespec ts;
		765	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		766	have_monotonic = 1;
		767	}
		768	#endif
		769
		770	ev_rt_now = ev_time ();
		771	mn_now = get_clock ();
		772	now_floor = mn_now;
		773	rtmn_diff = ev_rt_now - mn_now;
		774
		775	if (methods == EVMETHOD_AUTO)
		776	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		777	methods = atoi (getenv ("LIBEV_METHODS"));
		778	else
		779	methods = EVMETHOD_ANY;
		780
		781	method = 0;
		782	#if EV_USE_KQUEUE
		783	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		784	#endif
		785	#if EV_USE_EPOLL
		786	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		787	#endif
		788	#if EV_USE_POLL
		789	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		790	#endif
		791	#if EV_USE_SELECT
		792	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		793	#endif
		794
		795	ev_init (&sigev, sigcb);
		796	ev_set_priority (&sigev, EV_MAXPRI);
		797	}
		798	}
		799
		800	void
		801	loop_destroy (EV_P)
391	{	802	{
392	int i;	803	int i;
393		804
394	for (i = 0; i < pendingcnt; ++i)	805	#if EV_USE_KQUEUE
		806	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		807	#endif
		808	#if EV_USE_EPOLL
		809	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		810	#endif
		811	#if EV_USE_POLL
		812	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		813	#endif
		814	#if EV_USE_SELECT
		815	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		816	#endif
		817
		818	for (i = NUMPRI; i--; )
		819	array_free (pending, [i]);
		820
		821	/* have to use the microsoft-never-gets-it-right macro */
		822	array_free (fdchange, EMPTY);
		823	array_free (timer, EMPTY);
		824	#if EV_PERIODICS
		825	array_free (periodic, EMPTY);
		826	#endif
		827	array_free (idle, EMPTY);
		828	array_free (prepare, EMPTY);
		829	array_free (check, EMPTY);
		830
		831	method = 0;
		832	}
		833
		834	static void
		835	loop_fork (EV_P)
		836	{
		837	#if EV_USE_EPOLL
		838	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		839	#endif
		840	#if EV_USE_KQUEUE
		841	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		842	#endif
		843
		844	if (ev_is_active (&sigev))
		845	{
		846	/* default loop */
		847
		848	ev_ref (EV_A);
		849	ev_io_stop (EV_A_ &sigev);
		850	close (sigpipe [0]);
		851	close (sigpipe [1]);
		852
		853	while (pipe (sigpipe))
		854	syserr ("(libev) error creating pipe");
		855
		856	siginit (EV_A);
395	{	857	}
396	ANPENDING *p = pendings + i;
397		858
398	if (p->w)	859	postfork = 0;
		860	}
		861
		862	#if EV_MULTIPLICITY
		863	struct ev_loop *
		864	ev_loop_new (int methods)
		865	{
		866	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		867
		868	memset (loop, 0, sizeof (struct ev_loop));
		869
		870	loop_init (EV_A_ methods);
		871
		872	if (ev_method (EV_A))
		873	return loop;
		874
		875	return 0;
		876	}
		877
		878	void
		879	ev_loop_destroy (EV_P)
		880	{
		881	loop_destroy (EV_A);
		882	ev_free (loop);
		883	}
		884
		885	void
		886	ev_loop_fork (EV_P)
		887	{
		888	postfork = 1;
		889	}
		890
		891	#endif
		892
		893	#if EV_MULTIPLICITY
		894	struct ev_loop *
		895	#else
		896	int
		897	#endif
		898	ev_default_loop (int methods)
		899	{
		900	if (sigpipe [0] == sigpipe [1])
		901	if (pipe (sigpipe))
		902	return 0;
		903
		904	if (!default_loop)
		905	{
		906	#if EV_MULTIPLICITY
		907	struct ev_loop *loop = default_loop = &default_loop_struct;
		908	#else
		909	default_loop = 1;
		910	#endif
		911
		912	loop_init (EV_A_ methods);
		913
		914	if (ev_method (EV_A))
399	{	915	{
400	p->w->pending = 0;	916	siginit (EV_A);
401	p->w->cb (p->w, p->events);	917
		918	#ifndef _WIN32
		919	ev_signal_init (&childev, childcb, SIGCHLD);
		920	ev_set_priority (&childev, EV_MAXPRI);
		921	ev_signal_start (EV_A_ &childev);
		922	ev_unref (EV_A); /* child watcher should not keep loop alive */
		923	#endif
402	}	924	}
		925	else
		926	default_loop = 0;
		927	}
		928
		929	return default_loop;
		930	}
		931
		932	void
		933	ev_default_destroy (void)
		934	{
		935	#if EV_MULTIPLICITY
		936	struct ev_loop *loop = default_loop;
		937	#endif
		938
		939	#ifndef _WIN32
		940	ev_ref (EV_A); /* child watcher */
		941	ev_signal_stop (EV_A_ &childev);
		942	#endif
		943
		944	ev_ref (EV_A); /* signal watcher */
		945	ev_io_stop (EV_A_ &sigev);
		946
		947	close (sigpipe [0]); sigpipe [0] = 0;
		948	close (sigpipe [1]); sigpipe [1] = 0;
		949
		950	loop_destroy (EV_A);
		951	}
		952
		953	void
		954	ev_default_fork (void)
		955	{
		956	#if EV_MULTIPLICITY
		957	struct ev_loop *loop = default_loop;
		958	#endif
		959
		960	if (method)
		961	postfork = 1;
		962	}
		963
		964	/*****************************************************************************/
		965
		966	static int
		967	any_pending (EV_P)
		968	{
		969	int pri;
		970
		971	for (pri = NUMPRI; pri--; )
		972	if (pendingcnt [pri])
		973	return 1;
		974
		975	return 0;
		976	}
		977
		978	static void
		979	call_pending (EV_P)
		980	{
		981	int pri;
		982
		983	for (pri = NUMPRI; pri--; )
		984	while (pendingcnt [pri])
		985	{
		986	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		987
		988	if (p->w)
		989	{
		990	p->w->pending = 0;
		991	EV_CB_INVOKE (p->w, p->events);
		992	}
403	}	993	}
404
405	pendingcnt = 0;
406	}	994	}
407		995
408	static void	996	static void
409	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	997	timers_reify (EV_P)
410	{	998	{
411	while (timercnt && timers [0]->at <= now)	999	while (timercnt && ((WT)timers [0])->at <= mn_now)
412	{	1000	{
413	struct ev_timer *w = timers [0];	1001	struct ev_timer *w = timers [0];
		1002
		1003	assert (("inactive timer on timer heap detected", ev_is_active (w)));
414		1004
415	/* first reschedule or stop timer */	1005	/* first reschedule or stop timer */
416	if (w->repeat)	1006	if (w->repeat)
417	{	1007	{
418	if (w->is_abs)	1008	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
419	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;	1009
420	else
421	w->at = now + w->repeat;	1010	((WT)w)->at += w->repeat;
		1011	if (((WT)w)->at < mn_now)
		1012	((WT)w)->at = mn_now;
422		1013
423	assert (w->at > now);
424
425	downheap (timers, timercnt, 0);	1014	downheap ((WT *)timers, timercnt, 0);
426	}	1015	}
427	else	1016	else
		1017	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1018
		1019	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1020	}
		1021	}
		1022
		1023	#if EV_PERIODICS
		1024	static void
		1025	periodics_reify (EV_P)
		1026	{
		1027	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
		1028	{
		1029	struct ev_periodic *w = periodics [0];
		1030
		1031	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1032
		1033	/* first reschedule or stop timer */
		1034	if (w->reschedule_cb)
428	{	1035	{
429	evtimer_stop (w); /* nonrepeating: stop timer */	1036	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
430	--timercnt; /* maybe pass by reference instead? */	1037
		1038	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1039	downheap ((WT *)periodics, periodiccnt, 0);
431	}	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 */
432		1049
433	event ((W)w, EV_TIMEOUT);	1050	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
434	}	1051	}
435	}	1052	}
436		1053
437	static void	1054	static void
438	time_update ()	1055	periodics_reschedule (EV_P)
439	{	1056	{
440	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;
441	ev_now = ev_time ();	1089	ev_rt_now = ev_time ();
442		1090	return 1;
443	if (have_monotonic)
444	{	1091	}
445	ev_tstamp odiff = diff;	1092	}
446		1093
447	/* detecting time jumps is much more difficult */	1094	static void
448	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))
449	{	1103	{
450	now = get_clock ();	1104	ev_tstamp odiff = rtmn_diff;
		1105
		1106	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1107	{
451	diff = ev_now - now;	1108	rtmn_diff = ev_rt_now - mn_now;
452		1109
453	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1110	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
454	return; /* all is well */	1111	return; /* all is well */
455		1112
456	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) */
457	}	1123	}
		1124	}
		1125	else
		1126	#endif
		1127	{
		1128	ev_rt_now = ev_time ();
458		1129
459	/* time jump detected, reschedule atimers */	1130	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
460	for (i = 0; i < atimercnt; ++i)
461	{	1131	{
462	struct ev_timer *w = atimers [i];	1132	#if EV_PERIODICS
463	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;
464	}	1139	}
465	}
466	else
467	{
468	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
469	/* time jump detected, adjust rtimers */
470	for (i = 0; i < rtimercnt; ++i)
471	rtimers [i]->at += ev_now - now;
472		1140
473	now = ev_now;	1141	mn_now = ev_rt_now;
474	}	1142	}
475	}	1143	}
476		1144
477	int ev_loop_done;	1145	void
		1146	ev_ref (EV_P)
		1147	{
		1148	++activecnt;
		1149	}
478		1150
		1151	void
		1152	ev_unref (EV_P)
		1153	{
		1154	--activecnt;
		1155	}
		1156
		1157	static int loop_done;
		1158
		1159	void
479	void ev_loop (int flags)	1160	ev_loop (EV_P_ int flags)
480	{	1161	{
481	double block;	1162	double block;
482	ev_loop_done = flags & EVLOOP_ONESHOT;	1163	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
483
484	if (checkcnt)
485	{
486	queue_events ((W *)checks, checkcnt, EV_CHECK);
487	call_pending ();
488	}
489		1164
490	do	1165	do
491	{	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
492	/* update fd-related kernel structures */	1178	/* update fd-related kernel structures */
493	fd_reify ();	1179	fd_reify (EV_A);
494		1180
495	/* 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
496	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1195	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
497	block = 0.;	1196	block = 0.;
498	else	1197	else
499	{	1198	{
500	block = MAX_BLOCKTIME;	1199	block = MAX_BLOCKTIME;
501		1200
502	if (rtimercnt)	1201	if (timercnt)
503	{	1202	{
504	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1203	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
505	if (block > to) block = to;	1204	if (block > to) block = to;
506	}	1205	}
507		1206
		1207	#if EV_PERIODICS
508	if (atimercnt)	1208	if (periodiccnt)
509	{	1209	{
510	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1210	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
511	if (block > to) block = to;	1211	if (block > to) block = to;
512	}	1212	}
		1213	#endif
513		1214
514	if (block < 0.) block = 0.;	1215	if (block < 0.) block = 0.;
515	}	1216	}
516		1217
517	method_poll (block);	1218	method_poll (EV_A_ block);
518		1219
519	/* update ev_now, do magic */	1220	/* update ev_rt_now, do magic */
520	time_update ();	1221	time_update (EV_A);
521		1222
522	/* queue pending timers and reschedule them */	1223	/* queue pending timers and reschedule them */
523	/* absolute timers first */	1224	timers_reify (EV_A); /* relative timers called last */
524	timers_reify (atimers, atimercnt, ev_now);	1225	#if EV_PERIODICS
525	/* relative timers second */	1226	periodics_reify (EV_A); /* absolute timers called first */
526	timers_reify (rtimers, rtimercnt, now);	1227	#endif
527		1228
528	/* queue idle watchers unless io or timers are pending */	1229	/* queue idle watchers unless io or timers are pending */
529	if (!pendingcnt)	1230	if (idlecnt && !any_pending (EV_A))
530	queue_events ((W *)idles, idlecnt, EV_IDLE);	1231	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
531		1232
532	/* queue check and possibly idle watchers */	1233	/* queue check watchers, to be executed first */
		1234	if (checkcnt)
533	queue_events ((W *)checks, checkcnt, EV_CHECK);	1235	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
534		1236
535	call_pending ();	1237	call_pending (EV_A);
536	}	1238	}
537	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;
538	}	1249	}
539		1250
540	/*****************************************************************************/	1251	/*****************************************************************************/
541		1252
542	static void	1253	inline void
543	wlist_add (WL *head, WL elem)	1254	wlist_add (WL *head, WL elem)
544	{	1255	{
545	elem->next = *head;	1256	elem->next = *head;
546	*head = elem;	1257	*head = elem;
547	}	1258	}
548		1259
549	static void	1260	inline void
550	wlist_del (WL *head, WL elem)	1261	wlist_del (WL *head, WL elem)
551	{	1262	{
552	while (*head)	1263	while (*head)
553	{	1264	{
554	if (*head == elem)	1265	if (*head == elem)
559		1270
560	head = &(*head)->next;	1271	head = &(*head)->next;
561	}	1272	}
562	}	1273	}
563		1274
564	static void	1275	inline void
		1276	ev_clear_pending (EV_P_ W w)
		1277	{
		1278	if (w->pending)
		1279	{
		1280	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1281	w->pending = 0;
		1282	}
		1283	}
		1284
		1285	inline void
565	ev_start (W w, int active)	1286	ev_start (EV_P_ W w, int active)
566	{	1287	{
567	w->pending = 0;	1288	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1289	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1290
568	w->active = active;	1291	w->active = active;
		1292	ev_ref (EV_A);
569	}	1293	}
570		1294
571	static void	1295	inline void
572	ev_stop (W w)	1296	ev_stop (EV_P_ W w)
573	{	1297	{
574	if (w->pending)	1298	ev_unref (EV_A);
575	pendings [w->pending - 1].w = 0;
576
577	w->active = 0;	1299	w->active = 0;
578	/* nop */
579	}	1300	}
580		1301
581	/*****************************************************************************/	1302	/*****************************************************************************/
582		1303
583	void	1304	void
584	evio_start (struct ev_io *w)	1305	ev_io_start (EV_P_ struct ev_io *w)
585	{	1306	{
		1307	int fd = w->fd;
		1308
586	if (ev_is_active (w))	1309	if (ev_is_active (w))
587	return;	1310	return;
588		1311
589	int fd = w->fd;	1312	assert (("ev_io_start called with negative fd", fd >= 0));
590		1313
591	ev_start ((W)w, 1);	1314	ev_start (EV_A_ (W)w, 1);
592	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1315	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
593	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1316	wlist_add ((WL *)&anfds[fd].head, (WL)w);
594		1317
595	++fdchangecnt;	1318	fd_change (EV_A_ fd);
596	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
597	fdchanges [fdchangecnt - 1] = fd;
598	}	1319	}
599		1320
600	void	1321	void
601	evio_stop (struct ev_io *w)	1322	ev_io_stop (EV_P_ struct ev_io *w)
602	{	1323	{
		1324	ev_clear_pending (EV_A_ (W)w);
603	if (!ev_is_active (w))	1325	if (!ev_is_active (w))
604	return;	1326	return;
605		1327
		1328	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1329
606	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1330	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
607	ev_stop ((W)w);	1331	ev_stop (EV_A_ (W)w);
608		1332
609	++fdchangecnt;	1333	fd_change (EV_A_ w->fd);
610	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
611	fdchanges [fdchangecnt - 1] = w->fd;
612	}	1334	}
613		1335
614	void	1336	void
615	evtimer_start (struct ev_timer *w)	1337	ev_timer_start (EV_P_ struct ev_timer *w)
616	{	1338	{
617	if (ev_is_active (w))	1339	if (ev_is_active (w))
618	return;	1340	return;
619		1341
620	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, (void));
		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);
621	{	1367	}
622	/* 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	{
623	if (w->repeat)	1379	if (w->repeat)
624	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1380	{
625		1381	((WT)w)->at = mn_now + w->repeat;
626	ev_start ((W)w, ++atimercnt);	1382	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
627	array_needsize (atimers, atimermax, atimercnt, );	1383	}
628	atimers [atimercnt - 1] = w;
629	upheap (atimers, atimercnt - 1);
630	}
631	else	1384	else
		1385	ev_timer_stop (EV_A_ w);
632	{	1386	}
633	w->at += now;	1387	else if (w->repeat)
		1388	ev_timer_start (EV_A_ w);
		1389	}
634		1390
635	ev_start ((W)w, ++rtimercnt);	1391	#if EV_PERIODICS
636	array_needsize (rtimers, rtimermax, rtimercnt, );	1392	void
637	rtimers [rtimercnt - 1] = w;	1393	ev_periodic_start (EV_P_ struct ev_periodic *w)
638	upheap (rtimers, rtimercnt - 1);	1394	{
		1395	if (ev_is_active (w))
		1396	return;
		1397
		1398	if (w->reschedule_cb)
		1399	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1400	else if (w->interval)
639	}	1401	{
		1402	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1403	/* this formula differs from the one in periodic_reify because we do not always round up */
		1404	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1405	}
640		1406
641	}	1407	ev_start (EV_A_ (W)w, ++periodiccnt);
		1408	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
		1409	periodics [periodiccnt - 1] = w;
		1410	upheap ((WT *)periodics, periodiccnt - 1);
642		1411
		1412	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1413	}
		1414
643	void	1415	void
644	evtimer_stop (struct ev_timer *w)	1416	ev_periodic_stop (EV_P_ struct ev_periodic *w)
645	{	1417	{
		1418	ev_clear_pending (EV_A_ (W)w);
646	if (!ev_is_active (w))	1419	if (!ev_is_active (w))
647	return;	1420	return;
648		1421
649	if (w->is_abs)	1422	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
650	{	1423
651	if (w->active < atimercnt--)	1424	if (((W)w)->active < periodiccnt--)
652	{
653	atimers [w->active - 1] = atimers [atimercnt];
654	downheap (atimers, atimercnt, w->active - 1);
655	}
656	}	1425	{
657	else	1426	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1427	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
658	{	1428	}
659	if (w->active < rtimercnt--)
660	{
661	rtimers [w->active - 1] = rtimers [rtimercnt];
662	downheap (rtimers, rtimercnt, w->active - 1);
663	}
664	}
665		1429
666	ev_stop ((W)w);	1430	ev_stop (EV_A_ (W)w);
667	}	1431	}
668		1432
669	void	1433	void
670	evsignal_start (struct ev_signal *w)	1434	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1435	{
		1436	/* TODO: use adjustheap and recalculation */
		1437	ev_periodic_stop (EV_A_ w);
		1438	ev_periodic_start (EV_A_ w);
		1439	}
		1440	#endif
		1441
		1442	void
		1443	ev_idle_start (EV_P_ struct ev_idle *w)
671	{	1444	{
672	if (ev_is_active (w))	1445	if (ev_is_active (w))
673	return;	1446	return;
674		1447
		1448	ev_start (EV_A_ (W)w, ++idlecnt);
		1449	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1450	idles [idlecnt - 1] = w;
		1451	}
		1452
		1453	void
		1454	ev_idle_stop (EV_P_ struct ev_idle *w)
		1455	{
		1456	ev_clear_pending (EV_A_ (W)w);
		1457	if (!ev_is_active (w))
		1458	return;
		1459
		1460	idles [((W)w)->active - 1] = idles [--idlecnt];
		1461	ev_stop (EV_A_ (W)w);
		1462	}
		1463
		1464	void
		1465	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1466	{
		1467	if (ev_is_active (w))
		1468	return;
		1469
		1470	ev_start (EV_A_ (W)w, ++preparecnt);
		1471	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1472	prepares [preparecnt - 1] = w;
		1473	}
		1474
		1475	void
		1476	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1477	{
		1478	ev_clear_pending (EV_A_ (W)w);
		1479	if (!ev_is_active (w))
		1480	return;
		1481
		1482	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1483	ev_stop (EV_A_ (W)w);
		1484	}
		1485
		1486	void
		1487	ev_check_start (EV_P_ struct ev_check *w)
		1488	{
		1489	if (ev_is_active (w))
		1490	return;
		1491
		1492	ev_start (EV_A_ (W)w, ++checkcnt);
		1493	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1494	checks [checkcnt - 1] = w;
		1495	}
		1496
		1497	void
		1498	ev_check_stop (EV_P_ struct ev_check *w)
		1499	{
		1500	ev_clear_pending (EV_A_ (W)w);
		1501	if (!ev_is_active (w))
		1502	return;
		1503
		1504	checks [((W)w)->active - 1] = checks [--checkcnt];
		1505	ev_stop (EV_A_ (W)w);
		1506	}
		1507
		1508	#ifndef SA_RESTART
		1509	# define SA_RESTART 0
		1510	#endif
		1511
		1512	void
		1513	ev_signal_start (EV_P_ struct ev_signal *w)
		1514	{
		1515	#if EV_MULTIPLICITY
		1516	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1517	#endif
		1518	if (ev_is_active (w))
		1519	return;
		1520
		1521	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1522
675	ev_start ((W)w, 1);	1523	ev_start (EV_A_ (W)w, 1);
676	array_needsize (signals, signalmax, w->signum, signals_init);	1524	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
677	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1525	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
678		1526
679	if (!w->next)	1527	if (!((WL)w)->next)
680	{	1528	{
		1529	#if _WIN32
		1530	signal (w->signum, sighandler);
		1531	#else
681	struct sigaction sa;	1532	struct sigaction sa;
682	sa.sa_handler = sighandler;	1533	sa.sa_handler = sighandler;
683	sigfillset (&sa.sa_mask);	1534	sigfillset (&sa.sa_mask);
684	sa.sa_flags = 0;	1535	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
685	sigaction (w->signum, &sa, 0);	1536	sigaction (w->signum, &sa, 0);
		1537	#endif
686	}	1538	}
687	}	1539	}
688		1540
689	void	1541	void
690	evsignal_stop (struct ev_signal *w)	1542	ev_signal_stop (EV_P_ struct ev_signal *w)
691	{	1543	{
		1544	ev_clear_pending (EV_A_ (W)w);
692	if (!ev_is_active (w))	1545	if (!ev_is_active (w))
693	return;	1546	return;
694		1547
695	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1548	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
696	ev_stop ((W)w);	1549	ev_stop (EV_A_ (W)w);
697		1550
698	if (!signals [w->signum - 1].head)	1551	if (!signals [w->signum - 1].head)
699	signal (w->signum, SIG_DFL);	1552	signal (w->signum, SIG_DFL);
700	}	1553	}
701		1554
702	void evidle_start (struct ev_idle *w)	1555	void
		1556	ev_child_start (EV_P_ struct ev_child *w)
703	{	1557	{
		1558	#if EV_MULTIPLICITY
		1559	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1560	#endif
704	if (ev_is_active (w))	1561	if (ev_is_active (w))
705	return;	1562	return;
706		1563
707	ev_start ((W)w, ++idlecnt);	1564	ev_start (EV_A_ (W)w, 1);
708	array_needsize (idles, idlemax, idlecnt, );	1565	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
709	idles [idlecnt - 1] = w;
710	}	1566	}
711		1567
712	void evidle_stop (struct ev_idle *w)	1568	void
		1569	ev_child_stop (EV_P_ struct ev_child *w)
713	{	1570	{
714	idles [w->active - 1] = idles [--idlecnt];	1571	ev_clear_pending (EV_A_ (W)w);
715	ev_stop ((W)w);
716	}
717
718	void evcheck_start (struct ev_check *w)
719	{
720	if (ev_is_active (w))	1572	if (!ev_is_active (w))
721	return;	1573	return;
722		1574
723	ev_start ((W)w, ++checkcnt);	1575	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
724	array_needsize (checks, checkmax, checkcnt, );
725	checks [checkcnt - 1] = w;
726	}
727
728	void evcheck_stop (struct ev_check *w)
729	{
730	checks [w->active - 1] = checks [--checkcnt];
731	ev_stop ((W)w);	1576	ev_stop (EV_A_ (W)w);
732	}	1577	}
733		1578
734	/*****************************************************************************/	1579	/*****************************************************************************/
735		1580
736	#if 0	1581	struct ev_once
737
738	static void
739	sin_cb (struct ev_io *w, int revents)
740	{	1582	{
741	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
742	}
743
744	static void
745	ocb (struct ev_timer *w, int revents)
746	{
747	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
748	evtimer_stop (w);
749	evtimer_start (w);
750	}
751
752	static void
753	scb (struct ev_signal *w, int revents)
754	{
755	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
756	}
757
758	static void
759	gcb (struct ev_signal *w, int revents)
760	{
761	fprintf (stderr, "generic %x\n", revents);
762	}
763
764	int main (void)
765	{
766	struct ev_io sin;	1583	struct ev_io io;
767
768	ev_init (0);
769
770	evw_init (&sin, sin_cb, 55);
771	evio_set (&sin, 0, EV_READ);
772	evio_start (&sin);
773
774	struct ev_timer t[10000];
775
776	#if 0
777	int i;
778	for (i = 0; i < 10000; ++i)
779	{
780	struct ev_timer *w = t + i;
781	evw_init (w, ocb, i);
782	evtimer_set_abs (w, drand48 (), 0.99775533);
783	evtimer_start (w);
784	if (drand48 () < 0.5)
785	evtimer_stop (w);
786	}
787	#endif
788
789	struct ev_timer t1;	1584	struct ev_timer to;
790	evw_init (&t1, ocb, 0);	1585	void (cb)(int revents, void arg);
791	evtimer_set_abs (&t1, 5, 10);	1586	void *arg;
792	evtimer_start (&t1);	1587	};
793		1588
794	struct ev_signal sig;	1589	static void
795	evw_init (&sig, scb, 65535);	1590	once_cb (EV_P_ struct ev_once *once, int revents)
796	evsignal_set (&sig, SIGQUIT);	1591	{
797	evsignal_start (&sig);	1592	void (cb)(int revents, void arg) = once->cb;
		1593	void *arg = once->arg;
798		1594
799	struct ev_check cw;	1595	ev_io_stop (EV_A_ &once->io);
800	evw_init (&cw, gcb, 0);	1596	ev_timer_stop (EV_A_ &once->to);
801	evcheck_start (&cw);	1597	ev_free (once);
802		1598
803	struct ev_idle iw;	1599	cb (revents, arg);
804	evw_init (&iw, gcb, 0);
805	evidle_start (&iw);
806
807	ev_loop (0);
808
809	return 0;
810	}	1600	}
811		1601
812	#endif	1602	static void
		1603	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1604	{
		1605	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1606	}
813		1607
		1608	static void
		1609	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1610	{
		1611	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1612	}
814		1613
		1614	void
		1615	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1616	{
		1617	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
815		1618
		1619	if (!once)
		1620	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1621	else
		1622	{
		1623	once->cb = cb;
		1624	once->arg = arg;
816		1625
		1626	ev_init (&once->io, once_cb_io);
		1627	if (fd >= 0)
		1628	{
		1629	ev_io_set (&once->io, fd, events);
		1630	ev_io_start (EV_A_ &once->io);
		1631	}
		1632
		1633	ev_init (&once->to, once_cb_to);
		1634	if (timeout >= 0.)
		1635	{
		1636	ev_timer_set (&once->to, timeout, 0.);
		1637	ev_timer_start (EV_A_ &once->to);
		1638	}
		1639	}
		1640	}
		1641
		1642	#ifdef __cplusplus
		1643	}
		1644	#endif
		1645

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Comparing libev/ev.c (file contents): Revision 1.10 by root, Wed Oct 31 07:36:03 2007 UTC vs. Revision 1.106 by root, Mon Nov 12 01:07:50 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.10 by root, Wed Oct 31 07:36:03 2007 UTC vs.
Revision 1.106 by root, Mon Nov 12 01:07:50 2007 UTC