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

Comparing libev/ev.c (file contents):
Revision 1.8 by root, Wed Oct 31 00:32:33 2007 UTC vs.
Revision 1.98 by root, Sun Nov 11 02:05:20 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 && 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	#endif
		85	/**/
		86
		87	#ifndef EV_USE_MONOTONIC
		88	# define EV_USE_MONOTONIC 1
		89	#endif
		90
		91	#ifndef EV_USE_SELECT
		92	# define EV_USE_SELECT 1
		93	#endif
		94
		95	#ifndef EV_USE_POLL
		96	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		97	#endif
		98
		99	#ifndef EV_USE_EPOLL
		100	# define EV_USE_EPOLL 0
		101	#endif
		102
		103	#ifndef EV_USE_KQUEUE
		104	# define EV_USE_KQUEUE 0
		105	#endif
		106
		107	#ifndef EV_USE_WIN32
		108	# ifdef WIN32
		109	# define EV_USE_WIN32 0 /* it does not exist, use select */
		110	# undef EV_USE_SELECT
		111	# define EV_USE_SELECT 1
		112	# else
		113	# define EV_USE_WIN32 0
		114	# endif
		115	#endif
		116
		117	#ifndef EV_USE_REALTIME
		118	# define EV_USE_REALTIME 1
		119	#endif
		120
		121	/**/
		122
14	#ifdef CLOCK_MONOTONIC	123	#ifndef CLOCK_MONOTONIC
		124	# undef EV_USE_MONOTONIC
15	# define HAVE_MONOTONIC 1	125	# define EV_USE_MONOTONIC 0
16	#endif	126	#endif
17		127
		128	#ifndef CLOCK_REALTIME
		129	# undef EV_USE_REALTIME
18	#define HAVE_REALTIME 1	130	# define EV_USE_REALTIME 0
19	#define HAVE_EPOLL 1	131	#endif
20	#define HAVE_SELECT 1	132
		133	/**/
21		134
22	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	135	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
23	#define MAX_BLOCKTIME 60.	136	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		137	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		138	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
24		139
		140	#ifdef EV_H
		141	# include EV_H
		142	#else
25	#include "ev.h"	143	# include "ev.h"
		144	#endif
26		145
		146	#if __GNUC__ >= 3
		147	# define expect(expr,value) __builtin_expect ((expr),(value))
		148	# define inline inline
		149	#else
		150	# define expect(expr,value) (expr)
		151	# define inline static
		152	#endif
		153
		154	#define expect_false(expr) expect ((expr) != 0, 0)
		155	#define expect_true(expr) expect ((expr) != 0, 1)
		156
		157	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		158	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		159
27	struct ev_watcher {	160	typedef struct ev_watcher *W;
28	EV_WATCHER (ev_watcher);
29	};
30
31	struct ev_watcher_list {	161	typedef struct ev_watcher_list *WL;
32	EV_WATCHER_LIST (ev_watcher_list);	162	typedef struct ev_watcher_time *WT;
33	};
34		163
35	static ev_tstamp now, diff; /* monotonic clock */	164	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		165
		166	#ifdef WIN32
		167	# include "ev_win32.c"
		168	#endif
		169
		170	/*****************************************************************************/
		171
		172	static void (syserr_cb)(const char msg);
		173
		174	void ev_set_syserr_cb (void (cb)(const char msg))
		175	{
		176	syserr_cb = cb;
		177	}
		178
		179	static void
		180	syserr (const char *msg)
		181	{
		182	if (!msg)
		183	msg = "(libev) system error";
		184
		185	if (syserr_cb)
		186	syserr_cb (msg);
		187	else
		188	{
		189	perror (msg);
		190	abort ();
		191	}
		192	}
		193
		194	static void (alloc)(void *ptr, long size);
		195
		196	void ev_set_allocator (void (cb)(void *ptr, long size))
		197	{
		198	alloc = cb;
		199	}
		200
		201	static void *
		202	ev_realloc (void *ptr, long size)
		203	{
		204	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		205
		206	if (!ptr && size)
		207	{
		208	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		209	abort ();
		210	}
		211
		212	return ptr;
		213	}
		214
		215	#define ev_malloc(size) ev_realloc (0, (size))
		216	#define ev_free(ptr) ev_realloc ((ptr), 0)
		217
		218	/*****************************************************************************/
		219
		220	typedef struct
		221	{
		222	WL head;
		223	unsigned char events;
		224	unsigned char reify;
		225	} ANFD;
		226
		227	typedef struct
		228	{
		229	W w;
		230	int events;
		231	} ANPENDING;
		232
		233	#if EV_MULTIPLICITY
		234
		235	struct ev_loop
		236	{
		237	ev_tstamp ev_rt_now;
		238	#define VAR(name,decl) decl;
		239	#include "ev_vars.h"
		240	#undef VAR
		241	};
		242	#include "ev_wrap.h"
		243
		244	struct ev_loop default_loop_struct;
		245	static struct ev_loop *default_loop;
		246
		247	#else
		248
36	ev_tstamp ev_now;	249	ev_tstamp ev_rt_now;
37	int ev_method;	250	#define VAR(name,decl) static decl;
		251	#include "ev_vars.h"
		252	#undef VAR
38		253
39	static int have_monotonic; /* runtime */	254	static int default_loop;
40		255
41	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	256	#endif
42	static void (*method_modify)(int fd, int oev, int nev);
43	static void (*method_poll)(ev_tstamp timeout);
44		257
45	/*****************************************************************************/	258	/*****************************************************************************/
46		259
47	ev_tstamp	260	ev_tstamp
48	ev_time (void)	261	ev_time (void)
49	{	262	{
50	#if HAVE_REALTIME	263	#if EV_USE_REALTIME
51	struct timespec ts;	264	struct timespec ts;
52	clock_gettime (CLOCK_REALTIME, &ts);	265	clock_gettime (CLOCK_REALTIME, &ts);
53	return ts.tv_sec + ts.tv_nsec * 1e-9;	266	return ts.tv_sec + ts.tv_nsec * 1e-9;
54	#else	267	#else
55	struct timeval tv;	268	struct timeval tv;
56	gettimeofday (&tv, 0);	269	gettimeofday (&tv, 0);
57	return tv.tv_sec + tv.tv_usec * 1e-6;	270	return tv.tv_sec + tv.tv_usec * 1e-6;
58	#endif	271	#endif
59	}	272	}
60		273
61	static ev_tstamp	274	inline ev_tstamp
62	get_clock (void)	275	get_clock (void)
63	{	276	{
64	#if HAVE_MONOTONIC	277	#if EV_USE_MONOTONIC
65	if (have_monotonic)	278	if (expect_true (have_monotonic))
66	{	279	{
67	struct timespec ts;	280	struct timespec ts;
68	clock_gettime (CLOCK_MONOTONIC, &ts);	281	clock_gettime (CLOCK_MONOTONIC, &ts);
69	return ts.tv_sec + ts.tv_nsec * 1e-9;	282	return ts.tv_sec + ts.tv_nsec * 1e-9;
70	}	283	}
71	#endif	284	#endif
72		285
73	return ev_time ();	286	return ev_time ();
74	}	287	}
75		288
		289	#if EV_MULTIPLICITY
		290	ev_tstamp
		291	ev_now (EV_P)
		292	{
		293	return ev_rt_now;
		294	}
		295	#endif
		296
		297	#define array_roundsize(type,n) ((n) \| 4 & ~3)
		298
76	#define array_needsize(base,cur,cnt,init) \	299	#define array_needsize(type,base,cur,cnt,init) \
77	if ((cnt) > cur) \	300	if (expect_false ((cnt) > cur)) \
78	{ \	301	{ \
79	int newcnt = cur ? cur << 1 : 16; \	302	int newcnt = cur; \
80	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	303	do \
		304	{ \
		305	newcnt = array_roundsize (type, newcnt << 1); \
		306	} \
		307	while ((cnt) > newcnt); \
		308	\
81	base = realloc (base, sizeof (base) (newcnt)); \	309	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
82	init (base + cur, newcnt - cur); \	310	init (base + cur, newcnt - cur); \
83	cur = newcnt; \	311	cur = newcnt; \
84	}	312	}
		313
		314	#define array_slim(type,stem) \
		315	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		316	{ \
		317	stem ## max = array_roundsize (stem ## cnt >> 1); \
		318	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
		319	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		320	}
		321
		322	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		323	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		324	#define array_free_microshit(stem) \
		325	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		326
		327	#define array_free(stem, idx) \
		328	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
85		329
86	/*****************************************************************************/	330	/*****************************************************************************/
87		331
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	332	static void
101	anfds_init (ANFD *base, int count)	333	anfds_init (ANFD *base, int count)
102	{	334	{
103	while (count--)	335	while (count--)
104	{	336	{
105	base->head = 0;	337	base->head = 0;
106	base->wev = base->rev = EV_NONE;	338	base->events = EV_NONE;
		339	base->reify = 0;
		340
107	++base;	341	++base;
108	}	342	}
109	}	343	}
110		344
111	typedef struct	345	void
		346	ev_feed_event (EV_P_ void *w, int revents)
112	{	347	{
113	struct ev_watcher *w;	348	W w_ = (W)w;
114	int events;
115	} ANPENDING;
116		349
117	static ANPENDING *pendings;	350	if (w_->pending)
118	static int pendingmax, pendingcnt;	351	{
		352	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		353	return;
		354	}
119		355
120	static void
121	event (struct ev_watcher *w, int events)
122	{
123	w->pending = ++pendingcnt;	356	w_->pending = ++pendingcnt [ABSPRI (w_)];
124	array_needsize (pendings, pendingmax, pendingcnt, );	357	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
125	pendings [pendingcnt - 1].w = w;	358	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
126	pendings [pendingcnt - 1].events = events;	359	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
127	}	360	}
128		361
129	static void	362	static void
		363	queue_events (EV_P_ W *events, int eventcnt, int type)
		364	{
		365	int i;
		366
		367	for (i = 0; i < eventcnt; ++i)
		368	ev_feed_event (EV_A_ events [i], type);
		369	}
		370
		371	inline void
130	fd_event (int fd, int events)	372	fd_event (EV_P_ int fd, int revents)
131	{	373	{
132	ANFD *anfd = anfds + fd;	374	ANFD *anfd = anfds + fd;
133	struct ev_io *w;	375	struct ev_io *w;
134		376
135	for (w = anfd->head; w; w = w->next)	377	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
136	{	378	{
137	int ev = w->events & events;	379	int ev = w->events & revents;
138		380
139	if (ev)	381	if (ev)
140	event ((struct ev_watcher *)w, ev);	382	ev_feed_event (EV_A_ (W)w, ev);
141	}	383	}
		384	}
		385
		386	void
		387	ev_feed_fd_event (EV_P_ int fd, int revents)
		388	{
		389	fd_event (EV_A_ fd, revents);
142	}	390	}
143		391
144	/*****************************************************************************/	392	/*****************************************************************************/
145		393
146	static struct ev_timer **atimers;	394	static void
147	static int atimermax, atimercnt;	395	fd_reify (EV_P)
		396	{
		397	int i;
148		398
149	static struct ev_timer **rtimers;	399	for (i = 0; i < fdchangecnt; ++i)
150	static int rtimermax, rtimercnt;	400	{
		401	int fd = fdchanges [i];
		402	ANFD *anfd = anfds + fd;
		403	struct ev_io *w;
151		404
		405	int events = 0;
		406
		407	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		408	events \|= w->events;
		409
		410	anfd->reify = 0;
		411
		412	method_modify (EV_A_ fd, anfd->events, events);
		413	anfd->events = events;
		414	}
		415
		416	fdchangecnt = 0;
		417	}
		418
		419	static void
		420	fd_change (EV_P_ int fd)
		421	{
		422	if (anfds [fd].reify)
		423	return;
		424
		425	anfds [fd].reify = 1;
		426
		427	++fdchangecnt;
		428	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		429	fdchanges [fdchangecnt - 1] = fd;
		430	}
		431
		432	static void
		433	fd_kill (EV_P_ int fd)
		434	{
		435	struct ev_io *w;
		436
		437	while ((w = (struct ev_io *)anfds [fd].head))
		438	{
		439	ev_io_stop (EV_A_ w);
		440	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		441	}
		442	}
		443
152	static void	444	static int
153	upheap (struct ev_timer **timers, int k)	445	fd_valid (int fd)
154	{	446	{
155	struct ev_timer *w = timers [k];	447	#ifdef WIN32
		448	return !!win32_get_osfhandle (fd);
		449	#else
		450	return fcntl (fd, F_GETFD) != -1;
		451	#endif
		452	}
156		453
		454	/* called on EBADF to verify fds */
		455	static void
		456	fd_ebadf (EV_P)
		457	{
		458	int fd;
		459
		460	for (fd = 0; fd < anfdmax; ++fd)
		461	if (anfds [fd].events)
		462	if (!fd_valid (fd) == -1 && errno == EBADF)
		463	fd_kill (EV_A_ fd);
		464	}
		465
		466	/* called on ENOMEM in select/poll to kill some fds and retry */
		467	static void
		468	fd_enomem (EV_P)
		469	{
		470	int fd;
		471
		472	for (fd = anfdmax; fd--; )
		473	if (anfds [fd].events)
		474	{
		475	fd_kill (EV_A_ fd);
		476	return;
		477	}
		478	}
		479
		480	/* usually called after fork if method needs to re-arm all fds from scratch */
		481	static void
		482	fd_rearm_all (EV_P)
		483	{
		484	int fd;
		485
		486	/* this should be highly optimised to not do anything but set a flag */
		487	for (fd = 0; fd < anfdmax; ++fd)
		488	if (anfds [fd].events)
		489	{
		490	anfds [fd].events = 0;
		491	fd_change (EV_A_ fd);
		492	}
		493	}
		494
		495	/*****************************************************************************/
		496
		497	static void
		498	upheap (WT *heap, int k)
		499	{
		500	WT w = heap [k];
		501
157	while (k && timers [k >> 1]->at > w->at)	502	while (k && heap [k >> 1]->at > w->at)
158	{	503	{
159	timers [k] = timers [k >> 1];	504	heap [k] = heap [k >> 1];
160	timers [k]->active = k + 1;	505	((W)heap [k])->active = k + 1;
161	k >>= 1;	506	k >>= 1;
162	}	507	}
163		508
164	timers [k] = w;	509	heap [k] = w;
165	timers [k]->active = k + 1;	510	((W)heap [k])->active = k + 1;
166		511
167	}	512	}
168		513
169	static void	514	static void
170	downheap (struct ev_timer **timers, int N, int k)	515	downheap (WT *heap, int N, int k)
171	{	516	{
172	struct ev_timer *w = timers [k];	517	WT w = heap [k];
173		518
174	while (k < (N >> 1))	519	while (k < (N >> 1))
175	{	520	{
176	int j = k << 1;	521	int j = k << 1;
177		522
178	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	523	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
179	++j;	524	++j;
180		525
181	if (w->at <= timers [j]->at)	526	if (w->at <= heap [j]->at)
182	break;	527	break;
183		528
184	timers [k] = timers [j];	529	heap [k] = heap [j];
185	timers [k]->active = k + 1;	530	((W)heap [k])->active = k + 1;
186	k = j;	531	k = j;
187	}	532	}
188		533
189	timers [k] = w;	534	heap [k] = w;
190	timers [k]->active = k + 1;	535	((W)heap [k])->active = k + 1;
		536	}
		537
		538	inline void
		539	adjustheap (WT *heap, int N, int k, ev_tstamp at)
		540	{
		541	ev_tstamp old_at = heap [k]->at;
		542	heap [k]->at = at;
		543
		544	if (old_at < at)
		545	downheap (heap, N, k);
		546	else
		547	upheap (heap, k);
191	}	548	}
192		549
193	/*****************************************************************************/	550	/*****************************************************************************/
194		551
195	typedef struct	552	typedef struct
196	{	553	{
197	struct ev_signal *head;	554	WL head;
198	sig_atomic_t gotsig;	555	sig_atomic_t volatile gotsig;
199	} ANSIG;	556	} ANSIG;
200		557
201	static ANSIG *signals;	558	static ANSIG *signals;
202	static int signalmax;	559	static int signalmax;
203		560
204	static int sigpipe [2];	561	static int sigpipe [2];
205	static sig_atomic_t gotsig;	562	static sig_atomic_t volatile gotsig;
206	static struct ev_io sigev;	563	static struct ev_io sigev;
207		564
208	static void	565	static void
209	signals_init (ANSIG *base, int count)	566	signals_init (ANSIG *base, int count)
210	{	567	{
211	while (count--)	568	while (count--)
212	{	569	{
213	base->head = 0;	570	base->head = 0;
214	base->gotsig = 0;	571	base->gotsig = 0;
		572
215	++base;	573	++base;
216	}	574	}
217	}	575	}
218		576
219	static void	577	static void
220	sighandler (int signum)	578	sighandler (int signum)
221	{	579	{
		580	#if WIN32
		581	signal (signum, sighandler);
		582	#endif
		583
222	signals [signum - 1].gotsig = 1;	584	signals [signum - 1].gotsig = 1;
223		585
224	if (!gotsig)	586	if (!gotsig)
225	{	587	{
		588	int old_errno = errno;
226	gotsig = 1;	589	gotsig = 1;
		590	#ifdef WIN32
		591	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		592	#else
227	write (sigpipe [1], &gotsig, 1);	593	write (sigpipe [1], &signum, 1);
		594	#endif
		595	errno = old_errno;
228	}	596	}
229	}	597	}
230		598
		599	void
		600	ev_feed_signal_event (EV_P_ int signum)
		601	{
		602	WL w;
		603
		604	#if EV_MULTIPLICITY
		605	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		606	#endif
		607
		608	--signum;
		609
		610	if (signum < 0 \|\| signum >= signalmax)
		611	return;
		612
		613	signals [signum].gotsig = 0;
		614
		615	for (w = signals [signum].head; w; w = w->next)
		616	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		617	}
		618
231	static void	619	static void
232	sigcb (struct ev_io *iow, int revents)	620	sigcb (EV_P_ struct ev_io *iow, int revents)
233	{	621	{
234	struct ev_signal *w;
235	int sig;	622	int signum;
236		623
		624	#ifdef WIN32
		625	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		626	#else
		627	read (sigpipe [0], &revents, 1);
		628	#endif
237	gotsig = 0;	629	gotsig = 0;
238	read (sigpipe [0], &revents, 1);
239		630
240	for (sig = signalmax; sig--; )	631	for (signum = signalmax; signum--; )
241	if (signals [sig].gotsig)	632	if (signals [signum].gotsig)
242	{	633	ev_feed_signal_event (EV_A_ signum + 1);
243	signals [sig].gotsig = 0;
244
245	for (w = signals [sig].head; w; w = w->next)
246	event ((struct ev_watcher *)w, EV_SIGNAL);
247	}
248	}	634	}
249		635
250	static void	636	static void
251	siginit (void)	637	siginit (EV_P)
252	{	638	{
		639	#ifndef WIN32
253	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	640	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
254	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	641	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
255		642
256	/* rather than sort out wether we really need nb, set it */	643	/* rather than sort out wether we really need nb, set it */
257	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	644	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
258	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	645	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		646	#endif
259		647
260	evio_set (&sigev, sigpipe [0], EV_READ);	648	ev_io_set (&sigev, sigpipe [0], EV_READ);
261	evio_start (&sigev);	649	ev_io_start (EV_A_ &sigev);
		650	ev_unref (EV_A); /* child watcher should not keep loop alive */
262	}	651	}
263		652
264	/*****************************************************************************/	653	/*****************************************************************************/
265		654
		655	static struct ev_child *childs [PID_HASHSIZE];
		656
		657	#ifndef WIN32
		658
		659	static struct ev_signal childev;
		660
		661	#ifndef WCONTINUED
		662	# define WCONTINUED 0
		663	#endif
		664
		665	static void
		666	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		667	{
		668	struct ev_child *w;
		669
		670	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		671	if (w->pid == pid \|\| !w->pid)
		672	{
		673	ev_priority (w) = ev_priority (sw); /* need to do it now */
		674	w->rpid = pid;
		675	w->rstatus = status;
		676	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		677	}
		678	}
		679
		680	static void
		681	childcb (EV_P_ struct ev_signal *sw, int revents)
		682	{
		683	int pid, status;
		684
		685	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		686	{
		687	/* make sure we are called again until all childs have been reaped */
		688	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		689
		690	child_reap (EV_A_ sw, pid, pid, status);
		691	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		692	}
		693	}
		694
		695	#endif
		696
		697	/*****************************************************************************/
		698
		699	#if EV_USE_KQUEUE
		700	# include "ev_kqueue.c"
		701	#endif
266	#if HAVE_EPOLL	702	#if EV_USE_EPOLL
267	# include "ev_epoll.c"	703	# include "ev_epoll.c"
268	#endif	704	#endif
		705	#if EV_USE_POLL
		706	# include "ev_poll.c"
		707	#endif
269	#if HAVE_SELECT	708	#if EV_USE_SELECT
270	# include "ev_select.c"	709	# include "ev_select.c"
271	#endif	710	#endif
272		711
273	int ev_init (int flags)	712	int
		713	ev_version_major (void)
274	{	714	{
		715	return EV_VERSION_MAJOR;
		716	}
		717
		718	int
		719	ev_version_minor (void)
		720	{
		721	return EV_VERSION_MINOR;
		722	}
		723
		724	/* return true if we are running with elevated privileges and should ignore env variables */
		725	static int
		726	enable_secure (void)
		727	{
		728	#ifdef WIN32
		729	return 0;
		730	#else
		731	return getuid () != geteuid ()
		732	\|\| getgid () != getegid ();
		733	#endif
		734	}
		735
		736	int
		737	ev_method (EV_P)
		738	{
		739	return method;
		740	}
		741
		742	static void
		743	loop_init (EV_P_ int methods)
		744	{
		745	if (!method)
		746	{
275	#if HAVE_MONOTONIC	747	#if EV_USE_MONOTONIC
276	{	748	{
277	struct timespec ts;	749	struct timespec ts;
278	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	750	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
279	have_monotonic = 1;	751	have_monotonic = 1;
280	}	752	}
281	#endif	753	#endif
282		754
283	ev_now = ev_time ();	755	ev_rt_now = ev_time ();
284	now = get_clock ();	756	mn_now = get_clock ();
285	diff = ev_now - now;	757	now_floor = mn_now;
		758	rtmn_diff = ev_rt_now - mn_now;
286		759
		760	if (methods == EVMETHOD_AUTO)
		761	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		762	methods = atoi (getenv ("LIBEV_METHODS"));
		763	else
		764	methods = EVMETHOD_ANY;
		765
		766	method = 0;
		767	#if EV_USE_WIN32
		768	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		769	#endif
		770	#if EV_USE_KQUEUE
		771	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		772	#endif
		773	#if EV_USE_EPOLL
		774	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		775	#endif
		776	#if EV_USE_POLL
		777	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		778	#endif
		779	#if EV_USE_SELECT
		780	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		781	#endif
		782
		783	ev_init (&sigev, sigcb);
		784	ev_set_priority (&sigev, EV_MAXPRI);
		785	}
		786	}
		787
		788	void
		789	loop_destroy (EV_P)
		790	{
		791	int i;
		792
		793	#if EV_USE_WIN32
		794	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		795	#endif
		796	#if EV_USE_KQUEUE
		797	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		798	#endif
		799	#if EV_USE_EPOLL
		800	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		801	#endif
		802	#if EV_USE_POLL
		803	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		804	#endif
		805	#if EV_USE_SELECT
		806	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		807	#endif
		808
		809	for (i = NUMPRI; i--; )
		810	array_free (pending, [i]);
		811
		812	/* have to use the microsoft-never-gets-it-right macro */
		813	array_free_microshit (fdchange);
		814	array_free_microshit (timer);
		815	#if EV_PERIODICS
		816	array_free_microshit (periodic);
		817	#endif
		818	array_free_microshit (idle);
		819	array_free_microshit (prepare);
		820	array_free_microshit (check);
		821
		822	method = 0;
		823	}
		824
		825	static void
		826	loop_fork (EV_P)
		827	{
		828	#if EV_USE_EPOLL
		829	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		830	#endif
		831	#if EV_USE_KQUEUE
		832	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		833	#endif
		834
		835	if (ev_is_active (&sigev))
		836	{
		837	/* default loop */
		838
		839	ev_ref (EV_A);
		840	ev_io_stop (EV_A_ &sigev);
		841	close (sigpipe [0]);
		842	close (sigpipe [1]);
		843
		844	while (pipe (sigpipe))
		845	syserr ("(libev) error creating pipe");
		846
		847	siginit (EV_A);
		848	}
		849
		850	postfork = 0;
		851	}
		852
		853	#if EV_MULTIPLICITY
		854	struct ev_loop *
		855	ev_loop_new (int methods)
		856	{
		857	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		858
		859	memset (loop, 0, sizeof (struct ev_loop));
		860
		861	loop_init (EV_A_ methods);
		862
		863	if (ev_method (EV_A))
		864	return loop;
		865
		866	return 0;
		867	}
		868
		869	void
		870	ev_loop_destroy (EV_P)
		871	{
		872	loop_destroy (EV_A);
		873	ev_free (loop);
		874	}
		875
		876	void
		877	ev_loop_fork (EV_P)
		878	{
		879	postfork = 1;
		880	}
		881
		882	#endif
		883
		884	#if EV_MULTIPLICITY
		885	struct ev_loop *
		886	#else
		887	int
		888	#endif
		889	ev_default_loop (int methods)
		890	{
		891	if (sigpipe [0] == sigpipe [1])
287	if (pipe (sigpipe))	892	if (pipe (sigpipe))
288	return 0;	893	return 0;
289		894
290	ev_method = EVMETHOD_NONE;	895	if (!default_loop)
291	#if HAVE_EPOLL	896	{
292	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	897	#if EV_MULTIPLICITY
		898	struct ev_loop *loop = default_loop = &default_loop_struct;
		899	#else
		900	default_loop = 1;
293	#endif	901	#endif
294	#if HAVE_SELECT
295	if (ev_method == EVMETHOD_NONE) select_init (flags);
296	#endif
297		902
		903	loop_init (EV_A_ methods);
		904
		905	if (ev_method (EV_A))
		906	{
		907	siginit (EV_A);
		908
		909	#ifndef WIN32
		910	ev_signal_init (&childev, childcb, SIGCHLD);
		911	ev_set_priority (&childev, EV_MAXPRI);
		912	ev_signal_start (EV_A_ &childev);
		913	ev_unref (EV_A); /* child watcher should not keep loop alive */
		914	#endif
		915	}
		916	else
		917	default_loop = 0;
		918	}
		919
		920	return default_loop;
		921	}
		922
		923	void
		924	ev_default_destroy (void)
		925	{
		926	#if EV_MULTIPLICITY
		927	struct ev_loop *loop = default_loop;
		928	#endif
		929
		930	#ifndef WIN32
		931	ev_ref (EV_A); /* child watcher */
		932	ev_signal_stop (EV_A_ &childev);
		933	#endif
		934
		935	ev_ref (EV_A); /* signal watcher */
		936	ev_io_stop (EV_A_ &sigev);
		937
		938	close (sigpipe [0]); sigpipe [0] = 0;
		939	close (sigpipe [1]); sigpipe [1] = 0;
		940
		941	loop_destroy (EV_A);
		942	}
		943
		944	void
		945	ev_default_fork (void)
		946	{
		947	#if EV_MULTIPLICITY
		948	struct ev_loop *loop = default_loop;
		949	#endif
		950
298	if (ev_method)	951	if (method)
299	{	952	postfork = 1;
300	evw_init (&sigev, sigcb, 0);
301	siginit ();
302	}
303
304	return ev_method;
305	}	953	}
306		954
307	/*****************************************************************************/	955	/*****************************************************************************/
308		956
309	void ev_prefork (void)
310	{
311	}
312
313	void ev_postfork_parent (void)
314	{
315	}
316
317	void ev_postfork_child (void)
318	{
319	#if HAVE_EPOLL
320	if (ev_method == EVMETHOD_EPOLL)
321	epoll_postfork_child ();
322	#endif
323
324	evio_stop (&sigev);
325	close (sigpipe [0]);
326	close (sigpipe [1]);
327	pipe (sigpipe);
328	siginit ();
329	}
330
331	/*****************************************************************************/
332
333	static ev_hook hooks [EVHOOK_NUM];
334
335	void
336	ev_hook_register (int type, ev_hook hook)
337	{
338	hooks [type] = hook;
339	}
340
341	void
342	ev_hook_unregister (int type, ev_hook hook)
343	{
344	hooks [type] = 0;
345	}
346
347	static void	957	static int
348	hook_call (int type)	958	any_pending (EV_P)
349	{	959	{
350	if (hooks [type])
351	hooks [type] ();
352	}
353
354	static void
355	fd_reify (void)
356	{
357	int i;	960	int pri;
358		961
359	for (i = 0; i < fdchangecnt; ++i)	962	for (pri = NUMPRI; pri--; )
360	{	963	if (pendingcnt [pri])
361	int fd = fdchanges [i];	964	return 1;
362	ANFD *anfd = anfds + fd;
363	struct ev_io *w;
364		965
365	int wev = 0;	966	return 0;
366
367	for (w = anfd->head; w; w = w->next)
368	wev \|= w->events;
369
370	if (anfd->wev != wev)
371	{
372	method_modify (fd, anfd->wev, wev);
373	anfd->wev = wev;
374	}
375	}
376
377	fdchangecnt = 0;
378	}	967	}
379		968
380	static void	969	static void
381	call_pending ()	970	call_pending (EV_P)
382	{	971	{
383	int i;	972	int pri;
384		973
385	for (i = 0; i < pendingcnt; ++i)	974	for (pri = NUMPRI; pri--; )
		975	while (pendingcnt [pri])
386	{	976	{
387	ANPENDING *p = pendings + i;	977	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
388		978
389	if (p->w)	979	if (p->w)
390	{	980	{
391	p->w->pending = 0;	981	p->w->pending = 0;
392	p->w->cb (p->w, p->events);	982	EV_CB_INVOKE (p->w, p->events);
393	}	983	}
394	}	984	}
395
396	pendingcnt = 0;
397	}	985	}
398		986
399	static void	987	static void
400	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	988	timers_reify (EV_P)
401	{	989	{
402	while (timercnt && timers [0]->at <= now)	990	while (timercnt && ((WT)timers [0])->at <= mn_now)
403	{	991	{
404	struct ev_timer *w = timers [0];	992	struct ev_timer *w = timers [0];
		993
		994	assert (("inactive timer on timer heap detected", ev_is_active (w)));
405		995
406	/* first reschedule or stop timer */	996	/* first reschedule or stop timer */
407	if (w->repeat)	997	if (w->repeat)
408	{	998	{
409	if (w->is_abs)	999	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
410	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;	1000
411	else
412	w->at = now + w->repeat;	1001	((WT)w)->at += w->repeat;
		1002	if (((WT)w)->at < mn_now)
		1003	((WT)w)->at = mn_now;
413		1004
414	assert (w->at > now);
415
416	downheap (timers, timercnt, 0);	1005	downheap ((WT *)timers, timercnt, 0);
417	}	1006	}
418	else	1007	else
		1008	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1009
		1010	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1011	}
		1012	}
		1013
		1014	#if EV_PERIODICS
		1015	static void
		1016	periodics_reify (EV_P)
		1017	{
		1018	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
		1019	{
		1020	struct ev_periodic *w = periodics [0];
		1021
		1022	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1023
		1024	/* first reschedule or stop timer */
		1025	if (w->reschedule_cb)
419	{	1026	{
420	evtimer_stop (w); /* nonrepeating: stop timer */	1027	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
421	--timercnt; /* maybe pass by reference instead? */	1028
		1029	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1030	downheap ((WT *)periodics, periodiccnt, 0);
422	}	1031	}
		1032	else if (w->interval)
		1033	{
		1034	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
		1035	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1036	downheap ((WT *)periodics, periodiccnt, 0);
		1037	}
		1038	else
		1039	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
423		1040
424	event ((struct ev_watcher *)w, EV_TIMEOUT);	1041	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
425	}	1042	}
426	}	1043	}
427		1044
428	static void	1045	static void
429	time_update ()	1046	periodics_reschedule (EV_P)
430	{	1047	{
431	int i;	1048	int i;
		1049
		1050	/* adjust periodics after time jump */
		1051	for (i = 0; i < periodiccnt; ++i)
		1052	{
		1053	struct ev_periodic *w = periodics [i];
		1054
		1055	if (w->reschedule_cb)
		1056	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1057	else if (w->interval)
		1058	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1059	}
		1060
		1061	/* now rebuild the heap */
		1062	for (i = periodiccnt >> 1; i--; )
		1063	downheap ((WT *)periodics, periodiccnt, i);
		1064	}
		1065	#endif
		1066
		1067	inline int
		1068	time_update_monotonic (EV_P)
		1069	{
		1070	mn_now = get_clock ();
		1071
		1072	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1073	{
		1074	ev_rt_now = rtmn_diff + mn_now;
		1075	return 0;
		1076	}
		1077	else
		1078	{
		1079	now_floor = mn_now;
432	ev_now = ev_time ();	1080	ev_rt_now = ev_time ();
433		1081	return 1;
434	if (have_monotonic)
435	{	1082	}
436	ev_tstamp odiff = diff;	1083	}
437		1084
438	/* detecting time jumps is much more difficult */	1085	static void
439	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1086	time_update (EV_P)
		1087	{
		1088	int i;
		1089
		1090	#if EV_USE_MONOTONIC
		1091	if (expect_true (have_monotonic))
		1092	{
		1093	if (time_update_monotonic (EV_A))
440	{	1094	{
441	now = get_clock ();	1095	ev_tstamp odiff = rtmn_diff;
		1096
		1097	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1098	{
442	diff = ev_now - now;	1099	rtmn_diff = ev_rt_now - mn_now;
443		1100
444	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1101	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
445	return; /* all is well */	1102	return; /* all is well */
446		1103
447	ev_now = ev_time ();	1104	ev_rt_now = ev_time ();
		1105	mn_now = get_clock ();
		1106	now_floor = mn_now;
		1107	}
		1108
		1109	# if EV_PERIODICS
		1110	periodics_reschedule (EV_A);
		1111	# endif
		1112	/* no timer adjustment, as the monotonic clock doesn't jump */
		1113	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
448	}	1114	}
		1115	}
		1116	else
		1117	#endif
		1118	{
		1119	ev_rt_now = ev_time ();
449		1120
450	/* time jump detected, reschedule atimers */	1121	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
451	for (i = 0; i < atimercnt; ++i)
452	{	1122	{
453	struct ev_timer *w = atimers [i];	1123	#if EV_PERIODICS
454	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1124	periodics_reschedule (EV_A);
		1125	#endif
		1126
		1127	/* adjust timers. this is easy, as the offset is the same for all */
		1128	for (i = 0; i < timercnt; ++i)
		1129	((WT)timers [i])->at += ev_rt_now - mn_now;
455	}	1130	}
456	}
457	else
458	{
459	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
460	/* time jump detected, adjust rtimers */
461	for (i = 0; i < rtimercnt; ++i)
462	rtimers [i]->at += ev_now - now;
463		1131
464	now = ev_now;	1132	mn_now = ev_rt_now;
465	}	1133	}
466	}	1134	}
467		1135
468	int ev_loop_done;	1136	void
		1137	ev_ref (EV_P)
		1138	{
		1139	++activecnt;
		1140	}
469		1141
		1142	void
		1143	ev_unref (EV_P)
		1144	{
		1145	--activecnt;
		1146	}
		1147
		1148	static int loop_done;
		1149
		1150	void
470	void ev_loop (int flags)	1151	ev_loop (EV_P_ int flags)
471	{	1152	{
472	double block;	1153	double block;
473	ev_loop_done = flags & EVLOOP_ONESHOT;	1154	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
474		1155
475	do	1156	do
476	{	1157	{
477	hook_call (EVHOOK_PREPOLL);	1158	/* queue check watchers (and execute them) */
		1159	if (expect_false (preparecnt))
		1160	{
		1161	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1162	call_pending (EV_A);
		1163	}
		1164
		1165	/* we might have forked, so reify kernel state if necessary */
		1166	if (expect_false (postfork))
		1167	loop_fork (EV_A);
478		1168
479	/* update fd-related kernel structures */	1169	/* update fd-related kernel structures */
480	fd_reify ();	1170	fd_reify (EV_A);
481		1171
482	/* calculate blocking time */	1172	/* calculate blocking time */
		1173
		1174	/* we only need this for !monotonic clock or timers, but as we basically
		1175	always have timers, we just calculate it always */
		1176	#if EV_USE_MONOTONIC
		1177	if (expect_true (have_monotonic))
		1178	time_update_monotonic (EV_A);
		1179	else
		1180	#endif
		1181	{
		1182	ev_rt_now = ev_time ();
		1183	mn_now = ev_rt_now;
		1184	}
		1185
483	if (flags & EVLOOP_NONBLOCK)	1186	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
484	block = 0.;	1187	block = 0.;
485	else	1188	else
486	{	1189	{
487	block = MAX_BLOCKTIME;	1190	block = MAX_BLOCKTIME;
488		1191
489	if (rtimercnt)	1192	if (timercnt)
490	{	1193	{
491	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1194	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
492	if (block > to) block = to;	1195	if (block > to) block = to;
493	}	1196	}
494		1197
		1198	#if EV_PERIODICS
495	if (atimercnt)	1199	if (periodiccnt)
496	{	1200	{
497	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1201	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
498	if (block > to) block = to;	1202	if (block > to) block = to;
499	}	1203	}
		1204	#endif
500		1205
501	if (block < 0.) block = 0.;	1206	if (block < 0.) block = 0.;
502	}	1207	}
503		1208
504	method_poll (block);	1209	method_poll (EV_A_ block);
505		1210
506	/* update ev_now, do magic */	1211	/* update ev_rt_now, do magic */
507	time_update ();	1212	time_update (EV_A);
508		1213
509	hook_call (EVHOOK_POSTPOLL);
510
511	/* put pending timers into pendign queue and reschedule them */	1214	/* queue pending timers and reschedule them */
512	/* absolute timers first */	1215	timers_reify (EV_A); /* relative timers called last */
513	timers_reify (atimers, atimercnt, ev_now);	1216	#if EV_PERIODICS
514	/* relative timers second */	1217	periodics_reify (EV_A); /* absolute timers called first */
515	timers_reify (rtimers, rtimercnt, now);	1218	#endif
516		1219
		1220	/* queue idle watchers unless io or timers are pending */
		1221	if (idlecnt && !any_pending (EV_A))
		1222	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		1223
		1224	/* queue check watchers, to be executed first */
		1225	if (checkcnt)
		1226	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1227
517	call_pending ();	1228	call_pending (EV_A);
518	}	1229	}
519	while (!ev_loop_done);	1230	while (activecnt && !loop_done);
		1231
		1232	if (loop_done != 2)
		1233	loop_done = 0;
		1234	}
		1235
		1236	void
		1237	ev_unloop (EV_P_ int how)
		1238	{
		1239	loop_done = how;
520	}	1240	}
521		1241
522	/*****************************************************************************/	1242	/*****************************************************************************/
523		1243
524	static void	1244	inline void
525	wlist_add (struct ev_watcher_list *head, struct ev_watcher_list elem)	1245	wlist_add (WL *head, WL elem)
526	{	1246	{
527	elem->next = *head;	1247	elem->next = *head;
528	*head = elem;	1248	*head = elem;
529	}	1249	}
530		1250
531	static void	1251	inline void
532	wlist_del (struct ev_watcher_list *head, struct ev_watcher_list elem)	1252	wlist_del (WL *head, WL elem)
533	{	1253	{
534	while (*head)	1254	while (*head)
535	{	1255	{
536	if (*head == elem)	1256	if (*head == elem)
537	{	1257	{
541		1261
542	head = &(*head)->next;	1262	head = &(*head)->next;
543	}	1263	}
544	}	1264	}
545		1265
546	static void	1266	inline void
547	ev_start (struct ev_watcher *w, int active)	1267	ev_clear_pending (EV_P_ W w)
548	{	1268	{
		1269	if (w->pending)
		1270	{
		1271	pendings [ABSPRI (w)][w->pending - 1].w = 0;
549	w->pending = 0;	1272	w->pending = 0;
		1273	}
		1274	}
		1275
		1276	inline void
		1277	ev_start (EV_P_ W w, int active)
		1278	{
		1279	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1280	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1281
550	w->active = active;	1282	w->active = active;
		1283	ev_ref (EV_A);
551	}	1284	}
552		1285
553	static void	1286	inline void
554	ev_stop (struct ev_watcher *w)	1287	ev_stop (EV_P_ W w)
555	{	1288	{
556	if (w->pending)	1289	ev_unref (EV_A);
557	pendings [w->pending - 1].w = 0;
558
559	w->active = 0;	1290	w->active = 0;
560	/* nop */
561	}	1291	}
562		1292
563	/*****************************************************************************/	1293	/*****************************************************************************/
564		1294
565	void	1295	void
566	evio_start (struct ev_io *w)	1296	ev_io_start (EV_P_ struct ev_io *w)
567	{	1297	{
		1298	int fd = w->fd;
		1299
568	if (ev_is_active (w))	1300	if (ev_is_active (w))
569	return;	1301	return;
570		1302
571	int fd = w->fd;	1303	assert (("ev_io_start called with negative fd", fd >= 0));
572		1304
573	ev_start ((struct ev_watcher *)w, 1);	1305	ev_start (EV_A_ (W)w, 1);
574	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1306	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
575	wlist_add ((struct ev_watcher_list *)&anfds[fd].head, (struct ev_watcher_list )w);	1307	wlist_add ((WL *)&anfds[fd].head, (WL)w);
576		1308
577	++fdchangecnt;	1309	fd_change (EV_A_ fd);
578	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
579	fdchanges [fdchangecnt - 1] = fd;
580	}	1310	}
581		1311
582	void	1312	void
583	evio_stop (struct ev_io *w)	1313	ev_io_stop (EV_P_ struct ev_io *w)
584	{	1314	{
		1315	ev_clear_pending (EV_A_ (W)w);
585	if (!ev_is_active (w))	1316	if (!ev_is_active (w))
586	return;	1317	return;
587		1318
588	wlist_del ((struct ev_watcher_list *)&anfds[w->fd].head, (struct ev_watcher_list )w);	1319	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
589	ev_stop ((struct ev_watcher *)w);
590		1320
591	++fdchangecnt;	1321	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
592	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	1322	ev_stop (EV_A_ (W)w);
593	fdchanges [fdchangecnt - 1] = w->fd;
594	}
595		1323
		1324	fd_change (EV_A_ w->fd);
		1325	}
		1326
596	void	1327	void
597	evtimer_start (struct ev_timer *w)	1328	ev_timer_start (EV_P_ struct ev_timer *w)
598	{	1329	{
599	if (ev_is_active (w))	1330	if (ev_is_active (w))
600	return;	1331	return;
601		1332
602	if (w->is_abs)	1333	((WT)w)->at += mn_now;
		1334
		1335	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1336
		1337	ev_start (EV_A_ (W)w, ++timercnt);
		1338	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
		1339	timers [timercnt - 1] = w;
		1340	upheap ((WT *)timers, timercnt - 1);
		1341
		1342	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1343	}
		1344
		1345	void
		1346	ev_timer_stop (EV_P_ struct ev_timer *w)
		1347	{
		1348	ev_clear_pending (EV_A_ (W)w);
		1349	if (!ev_is_active (w))
		1350	return;
		1351
		1352	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1353
		1354	if (((W)w)->active < timercnt--)
		1355	{
		1356	timers [((W)w)->active - 1] = timers [timercnt];
		1357	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
603	{	1358	}
604	/* this formula differs from the one in timer_reify becuse we do not round up */	1359
		1360	((WT)w)->at -= mn_now;
		1361
		1362	ev_stop (EV_A_ (W)w);
		1363	}
		1364
		1365	void
		1366	ev_timer_again (EV_P_ struct ev_timer *w)
		1367	{
		1368	if (ev_is_active (w))
		1369	{
605	if (w->repeat)	1370	if (w->repeat)
606	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1371	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat);
607
608	ev_start ((struct ev_watcher *)w, ++atimercnt);
609	array_needsize (atimers, atimermax, atimercnt, );
610	atimers [atimercnt - 1] = w;
611	upheap (atimers, atimercnt - 1);
612	}
613	else	1372	else
		1373	ev_timer_stop (EV_A_ w);
614	{	1374	}
615	w->at += now;	1375	else if (w->repeat)
		1376	ev_timer_start (EV_A_ w);
		1377	}
616		1378
617	ev_start ((struct ev_watcher *)w, ++rtimercnt);	1379	#if EV_PERIODICS
618	array_needsize (rtimers, rtimermax, rtimercnt, );	1380	void
619	rtimers [rtimercnt - 1] = w;	1381	ev_periodic_start (EV_P_ struct ev_periodic *w)
620	upheap (rtimers, rtimercnt - 1);	1382	{
		1383	if (ev_is_active (w))
		1384	return;
		1385
		1386	if (w->reschedule_cb)
		1387	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1388	else if (w->interval)
621	}	1389	{
		1390	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1391	/* this formula differs from the one in periodic_reify because we do not always round up */
		1392	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1393	}
622		1394
623	}	1395	ev_start (EV_A_ (W)w, ++periodiccnt);
		1396	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
		1397	periodics [periodiccnt - 1] = w;
		1398	upheap ((WT *)periodics, periodiccnt - 1);
624		1399
		1400	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1401	}
		1402
625	void	1403	void
626	evtimer_stop (struct ev_timer *w)	1404	ev_periodic_stop (EV_P_ struct ev_periodic *w)
627	{	1405	{
		1406	ev_clear_pending (EV_A_ (W)w);
628	if (!ev_is_active (w))	1407	if (!ev_is_active (w))
629	return;	1408	return;
630		1409
631	if (w->is_abs)	1410	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
632	{	1411
633	if (w->active < atimercnt--)	1412	if (((W)w)->active < periodiccnt--)
634	{
635	atimers [w->active - 1] = atimers [atimercnt];
636	downheap (atimers, atimercnt, w->active - 1);
637	}
638	}	1413	{
639	else	1414	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1415	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
640	{	1416	}
641	if (w->active < rtimercnt--)
642	{
643	rtimers [w->active - 1] = rtimers [rtimercnt];
644	downheap (rtimers, rtimercnt, w->active - 1);
645	}
646	}
647		1417
648	ev_stop ((struct ev_watcher *)w);	1418	ev_stop (EV_A_ (W)w);
649	}	1419	}
650		1420
651	void	1421	void
652	evsignal_start (struct ev_signal *w)	1422	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1423	{
		1424	/* TODO: use adjustheap and recalculation */
		1425	ev_periodic_stop (EV_A_ w);
		1426	ev_periodic_start (EV_A_ w);
		1427	}
		1428	#endif
		1429
		1430	void
		1431	ev_idle_start (EV_P_ struct ev_idle *w)
653	{	1432	{
654	if (ev_is_active (w))	1433	if (ev_is_active (w))
655	return;	1434	return;
656		1435
657	ev_start ((struct ev_watcher *)w, 1);	1436	ev_start (EV_A_ (W)w, ++idlecnt);
		1437	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1438	idles [idlecnt - 1] = w;
		1439	}
		1440
		1441	void
		1442	ev_idle_stop (EV_P_ struct ev_idle *w)
		1443	{
		1444	ev_clear_pending (EV_A_ (W)w);
		1445	if (ev_is_active (w))
		1446	return;
		1447
		1448	idles [((W)w)->active - 1] = idles [--idlecnt];
		1449	ev_stop (EV_A_ (W)w);
		1450	}
		1451
		1452	void
		1453	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1454	{
		1455	if (ev_is_active (w))
		1456	return;
		1457
		1458	ev_start (EV_A_ (W)w, ++preparecnt);
		1459	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1460	prepares [preparecnt - 1] = w;
		1461	}
		1462
		1463	void
		1464	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1465	{
		1466	ev_clear_pending (EV_A_ (W)w);
		1467	if (ev_is_active (w))
		1468	return;
		1469
		1470	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1471	ev_stop (EV_A_ (W)w);
		1472	}
		1473
		1474	void
		1475	ev_check_start (EV_P_ struct ev_check *w)
		1476	{
		1477	if (ev_is_active (w))
		1478	return;
		1479
		1480	ev_start (EV_A_ (W)w, ++checkcnt);
		1481	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1482	checks [checkcnt - 1] = w;
		1483	}
		1484
		1485	void
		1486	ev_check_stop (EV_P_ struct ev_check *w)
		1487	{
		1488	ev_clear_pending (EV_A_ (W)w);
		1489	if (!ev_is_active (w))
		1490	return;
		1491
		1492	checks [((W)w)->active - 1] = checks [--checkcnt];
		1493	ev_stop (EV_A_ (W)w);
		1494	}
		1495
		1496	#ifndef SA_RESTART
		1497	# define SA_RESTART 0
		1498	#endif
		1499
		1500	void
		1501	ev_signal_start (EV_P_ struct ev_signal *w)
		1502	{
		1503	#if EV_MULTIPLICITY
		1504	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1505	#endif
		1506	if (ev_is_active (w))
		1507	return;
		1508
		1509	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1510
		1511	ev_start (EV_A_ (W)w, 1);
658	array_needsize (signals, signalmax, w->signum, signals_init);	1512	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
659	wlist_add ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	1513	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
660		1514
661	if (!w->next)	1515	if (!((WL)w)->next)
662	{	1516	{
		1517	#if WIN32
		1518	signal (w->signum, sighandler);
		1519	#else
663	struct sigaction sa;	1520	struct sigaction sa;
664	sa.sa_handler = sighandler;	1521	sa.sa_handler = sighandler;
665	sigfillset (&sa.sa_mask);	1522	sigfillset (&sa.sa_mask);
666	sa.sa_flags = 0;	1523	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
667	sigaction (w->signum, &sa, 0);	1524	sigaction (w->signum, &sa, 0);
		1525	#endif
668	}	1526	}
669	}	1527	}
670		1528
671	void	1529	void
672	evsignal_stop (struct ev_signal *w)	1530	ev_signal_stop (EV_P_ struct ev_signal *w)
673	{	1531	{
		1532	ev_clear_pending (EV_A_ (W)w);
674	if (!ev_is_active (w))	1533	if (!ev_is_active (w))
675	return;	1534	return;
676		1535
677	wlist_del ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	1536	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
678	ev_stop ((struct ev_watcher *)w);	1537	ev_stop (EV_A_ (W)w);
679		1538
680	if (!signals [w->signum - 1].head)	1539	if (!signals [w->signum - 1].head)
681	signal (w->signum, SIG_DFL);	1540	signal (w->signum, SIG_DFL);
682	}	1541	}
683		1542
		1543	void
		1544	ev_child_start (EV_P_ struct ev_child *w)
		1545	{
		1546	#if EV_MULTIPLICITY
		1547	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1548	#endif
		1549	if (ev_is_active (w))
		1550	return;
		1551
		1552	ev_start (EV_A_ (W)w, 1);
		1553	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1554	}
		1555
		1556	void
		1557	ev_child_stop (EV_P_ struct ev_child *w)
		1558	{
		1559	ev_clear_pending (EV_A_ (W)w);
		1560	if (!ev_is_active (w))
		1561	return;
		1562
		1563	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1564	ev_stop (EV_A_ (W)w);
		1565	}
		1566
684	/*****************************************************************************/	1567	/*****************************************************************************/
685	#if 1
686		1568
687	static void	1569	struct ev_once
688	sin_cb (struct ev_io *w, int revents)
689	{	1570	{
690	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
691	}
692
693	static void
694	ocb (struct ev_timer *w, int revents)
695	{
696	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
697	evtimer_stop (w);
698	evtimer_start (w);
699	}
700
701	static void
702	scb (struct ev_signal *w, int revents)
703	{
704	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
705	}
706
707	int main (void)
708	{
709	struct ev_io sin;	1571	struct ev_io io;
710
711	ev_init (0);
712
713	evw_init (&sin, sin_cb, 55);
714	evio_set (&sin, 0, EV_READ);
715	evio_start (&sin);
716
717	struct ev_timer t[10000];
718
719	#if 1
720	int i;
721	for (i = 0; i < 10000; ++i)
722	{
723	struct ev_timer *w = t + i;
724	evw_init (w, ocb, i);
725	evtimer_set_abs (w, drand48 (), 0.99775533);
726	evtimer_start (w);
727	if (drand48 () < 0.5)
728	evtimer_stop (w);
729	}
730	#endif
731
732	struct ev_timer t1;	1572	struct ev_timer to;
733	evw_init (&t1, ocb, 0);	1573	void (cb)(int revents, void arg);
734	evtimer_set_abs (&t1, 5, 10);	1574	void *arg;
735	evtimer_start (&t1);	1575	};
736		1576
737	struct ev_signal sig;	1577	static void
738	evw_init (&sig, scb, 65535);	1578	once_cb (EV_P_ struct ev_once *once, int revents)
739	evsignal_set (&sig, SIGQUIT);	1579	{
740	evsignal_start (&sig);	1580	void (cb)(int revents, void arg) = once->cb;
		1581	void *arg = once->arg;
741		1582
742	ev_loop (0);	1583	ev_io_stop (EV_A_ &once->io);
		1584	ev_timer_stop (EV_A_ &once->to);
		1585	ev_free (once);
743		1586
744	return 0;	1587	cb (revents, arg);
745	}	1588	}
746		1589
747	#endif	1590	static void
		1591	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1592	{
		1593	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1594	}
748		1595
		1596	static void
		1597	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1598	{
		1599	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1600	}
749		1601
		1602	void
		1603	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1604	{
		1605	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
750		1606
		1607	if (!once)
		1608	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1609	else
		1610	{
		1611	once->cb = cb;
		1612	once->arg = arg;
751		1613
		1614	ev_init (&once->io, once_cb_io);
		1615	if (fd >= 0)
		1616	{
		1617	ev_io_set (&once->io, fd, events);
		1618	ev_io_start (EV_A_ &once->io);
		1619	}
		1620
		1621	ev_init (&once->to, once_cb_to);
		1622	if (timeout >= 0.)
		1623	{
		1624	ev_timer_set (&once->to, timeout, 0.);
		1625	ev_timer_start (EV_A_ &once->to);
		1626	}
		1627	}
		1628	}
		1629
		1630	#ifdef __cplusplus
		1631	}
		1632	#endif
		1633

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Comparing libev/ev.c (file contents): Revision 1.8 by root, Wed Oct 31 00:32:33 2007 UTC vs. Revision 1.98 by root, Sun Nov 11 02:05:20 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.8 by root, Wed Oct 31 00:32:33 2007 UTC vs.
Revision 1.98 by root, Sun Nov 11 02:05:20 2007 UTC