[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 1.79 by root, Fri Nov 9 15:15:20 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	#ifndef EV_STANDALONE
		32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
		55	#endif
		56
1	#include <math.h>	57	#include <math.h>
2	#include <stdlib.h>	58	#include <stdlib.h>
3	#include <unistd.h>
4	#include <fcntl.h>	59	#include <fcntl.h>
5	#include <signal.h>	60	#include <stddef.h>
6		61
7	#include <stdio.h>	62	#include <stdio.h>
8		63
9	#include <assert.h>	64	#include <assert.h>
10	#include <errno.h>	65	#include <errno.h>
11	#include <sys/time.h>	66	#include <sys/types.h>
12	#include <time.h>	67	#include <time.h>
13		68
		69	#include <signal.h>
		70
		71	#ifndef WIN32
		72	# include <unistd.h>
		73	# include <sys/time.h>
		74	# include <sys/wait.h>
		75	#endif
		76	/**/
		77
14	#ifndef HAVE_MONOTONIC	78	#ifndef EV_USE_MONOTONIC
15	# ifdef CLOCK_MONOTONIC
16	# define HAVE_MONOTONIC 1	79	# define EV_USE_MONOTONIC 1
		80	#endif
		81
		82	#ifndef EV_USE_SELECT
		83	# define EV_USE_SELECT 1
		84	#endif
		85
		86	#ifndef EV_USE_POLL
		87	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		88	#endif
		89
		90	#ifndef EV_USE_EPOLL
		91	# define EV_USE_EPOLL 0
		92	#endif
		93
		94	#ifndef EV_USE_KQUEUE
		95	# define EV_USE_KQUEUE 0
		96	#endif
		97
		98	#ifndef EV_USE_WIN32
		99	# ifdef WIN32
		100	# define EV_USE_WIN32 0 /* it does not exist, use select */
		101	# undef EV_USE_SELECT
		102	# define EV_USE_SELECT 1
		103	# else
		104	# define EV_USE_WIN32 0
17	# endif	105	# endif
18	#endif	106	#endif
19		107
20	#ifndef HAVE_SELECT
21	# define HAVE_SELECT 1
22	#endif
23
24	#ifndef HAVE_EPOLL
25	# define HAVE_EPOLL 0
26	#endif
27
28	#ifndef HAVE_REALTIME	108	#ifndef EV_USE_REALTIME
29	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	109	# define EV_USE_REALTIME 1
30	#endif	110	#endif
		111
		112	/**/
		113
		114	#ifndef CLOCK_MONOTONIC
		115	# undef EV_USE_MONOTONIC
		116	# define EV_USE_MONOTONIC 0
		117	#endif
		118
		119	#ifndef CLOCK_REALTIME
		120	# undef EV_USE_REALTIME
		121	# define EV_USE_REALTIME 0
		122	#endif
		123
		124	/**/
31		125
32	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	126	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
33	#define MAX_BLOCKTIME 60.	127	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		128	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		129	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
34		130
35	#include "ev.h"	131	#include "ev.h"
36		132
37	struct ev_watcher {	133	#if __GNUC__ >= 3
38	EV_WATCHER (ev_watcher);	134	# define expect(expr,value) __builtin_expect ((expr),(value))
39	};	135	# define inline inline
		136	#else
		137	# define expect(expr,value) (expr)
		138	# define inline static
		139	#endif
40		140
41	struct ev_watcher_list {	141	#define expect_false(expr) expect ((expr) != 0, 0)
42	EV_WATCHER_LIST (ev_watcher_list);	142	#define expect_true(expr) expect ((expr) != 0, 1)
43	};	143
		144	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		145	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
44		146
45	typedef struct ev_watcher *W;	147	typedef struct ev_watcher *W;
46	typedef struct ev_watcher_list *WL;	148	typedef struct ev_watcher_list *WL;
		149	typedef struct ev_watcher_time *WT;
47		150
48	static ev_tstamp now, diff; /* monotonic clock */	151	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
49	ev_tstamp ev_now;
50	int ev_method;
51		152
52	static int have_monotonic; /* runtime */	153	#include "ev_win32.c"
53
54	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
55	static void (*method_modify)(int fd, int oev, int nev);
56	static void (*method_poll)(ev_tstamp timeout);
57		154
58	/*****************************************************************************/	155	/*****************************************************************************/
59		156
60	ev_tstamp	157	static void (syserr_cb)(const char msg);
		158
		159	void ev_set_syserr_cb (void (cb)(const char msg))
		160	{
		161	syserr_cb = cb;
		162	}
		163
		164	static void
		165	syserr (const char *msg)
		166	{
		167	if (!msg)
		168	msg = "(libev) system error";
		169
		170	if (syserr_cb)
		171	syserr_cb (msg);
		172	else
		173	{
		174	perror (msg);
		175	abort ();
		176	}
		177	}
		178
		179	static void (alloc)(void *ptr, long size);
		180
		181	void ev_set_allocator (void (cb)(void *ptr, long size))
		182	{
		183	alloc = cb;
		184	}
		185
		186	static void *
		187	ev_realloc (void *ptr, long size)
		188	{
		189	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		190
		191	if (!ptr && size)
		192	{
		193	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		194	abort ();
		195	}
		196
		197	return ptr;
		198	}
		199
		200	#define ev_malloc(size) ev_realloc (0, (size))
		201	#define ev_free(ptr) ev_realloc ((ptr), 0)
		202
		203	/*****************************************************************************/
		204
		205	typedef struct
		206	{
		207	WL head;
		208	unsigned char events;
		209	unsigned char reify;
		210	} ANFD;
		211
		212	typedef struct
		213	{
		214	W w;
		215	int events;
		216	} ANPENDING;
		217
		218	#if EV_MULTIPLICITY
		219
		220	struct ev_loop
		221	{
		222	# define VAR(name,decl) decl;
		223	# include "ev_vars.h"
		224	};
		225	# undef VAR
		226	# include "ev_wrap.h"
		227
		228	#else
		229
		230	# define VAR(name,decl) static decl;
		231	# include "ev_vars.h"
		232	# undef VAR
		233
		234	#endif
		235
		236	/*****************************************************************************/
		237
		238	inline ev_tstamp
61	ev_time (void)	239	ev_time (void)
62	{	240	{
63	#if HAVE_REALTIME	241	#if EV_USE_REALTIME
64	struct timespec ts;	242	struct timespec ts;
65	clock_gettime (CLOCK_REALTIME, &ts);	243	clock_gettime (CLOCK_REALTIME, &ts);
66	return ts.tv_sec + ts.tv_nsec * 1e-9;	244	return ts.tv_sec + ts.tv_nsec * 1e-9;
67	#else	245	#else
68	struct timeval tv;	246	struct timeval tv;
69	gettimeofday (&tv, 0);	247	gettimeofday (&tv, 0);
70	return tv.tv_sec + tv.tv_usec * 1e-6;	248	return tv.tv_sec + tv.tv_usec * 1e-6;
71	#endif	249	#endif
72	}	250	}
73		251
74	static ev_tstamp	252	inline ev_tstamp
75	get_clock (void)	253	get_clock (void)
76	{	254	{
77	#if HAVE_MONOTONIC	255	#if EV_USE_MONOTONIC
78	if (have_monotonic)	256	if (expect_true (have_monotonic))
79	{	257	{
80	struct timespec ts;	258	struct timespec ts;
81	clock_gettime (CLOCK_MONOTONIC, &ts);	259	clock_gettime (CLOCK_MONOTONIC, &ts);
82	return ts.tv_sec + ts.tv_nsec * 1e-9;	260	return ts.tv_sec + ts.tv_nsec * 1e-9;
83	}	261	}
84	#endif	262	#endif
85		263
86	return ev_time ();	264	return ev_time ();
87	}	265	}
88		266
		267	ev_tstamp
		268	ev_now (EV_P)
		269	{
		270	return rt_now;
		271	}
		272
		273	#define array_roundsize(type,n) ((n) \| 4 & ~3)
		274
89	#define array_needsize(base,cur,cnt,init) \	275	#define array_needsize(type,base,cur,cnt,init) \
90	if ((cnt) > cur) \	276	if (expect_false ((cnt) > cur)) \
91	{ \	277	{ \
92	int newcnt = cur ? cur << 1 : 16; \	278	int newcnt = cur; \
93	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	279	do \
		280	{ \
		281	newcnt = array_roundsize (type, newcnt << 1); \
		282	} \
		283	while ((cnt) > newcnt); \
		284	\
94	base = realloc (base, sizeof (base) (newcnt)); \	285	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
95	init (base + cur, newcnt - cur); \	286	init (base + cur, newcnt - cur); \
96	cur = newcnt; \	287	cur = newcnt; \
97	}	288	}
		289
		290	#define array_slim(type,stem) \
		291	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		292	{ \
		293	stem ## max = array_roundsize (stem ## cnt >> 1); \
		294	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
		295	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		296	}
		297
		298	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		299	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		300	#define array_free_microshit(stem) \
		301	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		302
		303	#define array_free(stem, idx) \
		304	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
98		305
99	/*****************************************************************************/	306	/*****************************************************************************/
100		307
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	308	static void
114	anfds_init (ANFD *base, int count)	309	anfds_init (ANFD *base, int count)
115	{	310	{
116	while (count--)	311	while (count--)
117	{	312	{
118	base->head = 0;	313	base->head = 0;
119	base->wev = base->rev = EV_NONE;	314	base->events = EV_NONE;
		315	base->reify = 0;
		316
120	++base;	317	++base;
121	}	318	}
122	}	319	}
123		320
124	typedef struct	321	void
		322	ev_feed_event (EV_P_ void *w, int revents)
125	{	323	{
126	W w;	324	W w_ = (W)w;
127	int events;
128	} ANPENDING;
129		325
130	static ANPENDING *pendings;	326	if (w_->pending)
131	static int pendingmax, pendingcnt;	327	{
		328	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		329	return;
		330	}
132		331
133	static void
134	event (W w, int events)
135	{
136	w->pending = ++pendingcnt;	332	w_->pending = ++pendingcnt [ABSPRI (w_)];
137	array_needsize (pendings, pendingmax, pendingcnt, );	333	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
138	pendings [pendingcnt - 1].w = w;	334	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
139	pendings [pendingcnt - 1].events = events;	335	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
140	}	336	}
141		337
142	static void	338	static void
		339	queue_events (EV_P_ W *events, int eventcnt, int type)
		340	{
		341	int i;
		342
		343	for (i = 0; i < eventcnt; ++i)
		344	ev_feed_event (EV_A_ events [i], type);
		345	}
		346
		347	inline void
143	fd_event (int fd, int events)	348	fd_event (EV_P_ int fd, int revents)
144	{	349	{
145	ANFD *anfd = anfds + fd;	350	ANFD *anfd = anfds + fd;
146	struct ev_io *w;	351	struct ev_io *w;
147		352
148	for (w = anfd->head; w; w = w->next)	353	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
149	{	354	{
150	int ev = w->events & events;	355	int ev = w->events & revents;
151		356
152	if (ev)	357	if (ev)
153	event ((W)w, ev);	358	ev_feed_event (EV_A_ (W)w, ev);
154	}	359	}
155	}	360	}
156		361
		362	void
		363	ev_feed_fd_event (EV_P_ int fd, int revents)
		364	{
		365	fd_event (EV_A_ fd, revents);
		366	}
		367
		368	/*****************************************************************************/
		369
157	static void	370	static void
158	queue_events (W *events, int eventcnt, int type)	371	fd_reify (EV_P)
159	{	372	{
160	int i;	373	int i;
161		374
162	for (i = 0; i < eventcnt; ++i)	375	for (i = 0; i < fdchangecnt; ++i)
163	event (events [i], type);	376	{
		377	int fd = fdchanges [i];
		378	ANFD *anfd = anfds + fd;
		379	struct ev_io *w;
		380
		381	int events = 0;
		382
		383	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		384	events \|= w->events;
		385
		386	anfd->reify = 0;
		387
		388	method_modify (EV_A_ fd, anfd->events, events);
		389	anfd->events = events;
		390	}
		391
		392	fdchangecnt = 0;
		393	}
		394
		395	static void
		396	fd_change (EV_P_ int fd)
		397	{
		398	if (anfds [fd].reify)
		399	return;
		400
		401	anfds [fd].reify = 1;
		402
		403	++fdchangecnt;
		404	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		405	fdchanges [fdchangecnt - 1] = fd;
		406	}
		407
		408	static void
		409	fd_kill (EV_P_ int fd)
		410	{
		411	struct ev_io *w;
		412
		413	while ((w = (struct ev_io *)anfds [fd].head))
		414	{
		415	ev_io_stop (EV_A_ w);
		416	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		417	}
		418	}
		419
		420	static int
		421	fd_valid (int fd)
		422	{
		423	#ifdef WIN32
		424	return !!win32_get_osfhandle (fd);
		425	#else
		426	return fcntl (fd, F_GETFD) != -1;
		427	#endif
		428	}
		429
		430	/* called on EBADF to verify fds */
		431	static void
		432	fd_ebadf (EV_P)
		433	{
		434	int fd;
		435
		436	for (fd = 0; fd < anfdmax; ++fd)
		437	if (anfds [fd].events)
		438	if (!fd_valid (fd) == -1 && errno == EBADF)
		439	fd_kill (EV_A_ fd);
		440	}
		441
		442	/* called on ENOMEM in select/poll to kill some fds and retry */
		443	static void
		444	fd_enomem (EV_P)
		445	{
		446	int fd;
		447
		448	for (fd = anfdmax; fd--; )
		449	if (anfds [fd].events)
		450	{
		451	fd_kill (EV_A_ fd);
		452	return;
		453	}
		454	}
		455
		456	/* usually called after fork if method needs to re-arm all fds from scratch */
		457	static void
		458	fd_rearm_all (EV_P)
		459	{
		460	int fd;
		461
		462	/* this should be highly optimised to not do anything but set a flag */
		463	for (fd = 0; fd < anfdmax; ++fd)
		464	if (anfds [fd].events)
		465	{
		466	anfds [fd].events = 0;
		467	fd_change (EV_A_ fd);
		468	}
164	}	469	}
165		470
166	/*****************************************************************************/	471	/*****************************************************************************/
167		472
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	473	static void
175	upheap (struct ev_timer **timers, int k)	474	upheap (WT *heap, int k)
176	{	475	{
177	struct ev_timer *w = timers [k];	476	WT w = heap [k];
178		477
179	while (k && timers [k >> 1]->at > w->at)	478	while (k && heap [k >> 1]->at > w->at)
180	{	479	{
181	timers [k] = timers [k >> 1];	480	heap [k] = heap [k >> 1];
182	timers [k]->active = k + 1;	481	((W)heap [k])->active = k + 1;
183	k >>= 1;	482	k >>= 1;
184	}	483	}
185		484
186	timers [k] = w;	485	heap [k] = w;
187	timers [k]->active = k + 1;	486	((W)heap [k])->active = k + 1;
188		487
189	}	488	}
190		489
191	static void	490	static void
192	downheap (struct ev_timer **timers, int N, int k)	491	downheap (WT *heap, int N, int k)
193	{	492	{
194	struct ev_timer *w = timers [k];	493	WT w = heap [k];
195		494
196	while (k < (N >> 1))	495	while (k < (N >> 1))
197	{	496	{
198	int j = k << 1;	497	int j = k << 1;
199		498
200	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	499	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
201	++j;	500	++j;
202		501
203	if (w->at <= timers [j]->at)	502	if (w->at <= heap [j]->at)
204	break;	503	break;
205		504
206	timers [k] = timers [j];	505	heap [k] = heap [j];
207	timers [k]->active = k + 1;	506	((W)heap [k])->active = k + 1;
208	k = j;	507	k = j;
209	}	508	}
210		509
211	timers [k] = w;	510	heap [k] = w;
212	timers [k]->active = k + 1;	511	((W)heap [k])->active = k + 1;
213	}	512	}
214		513
215	/*****************************************************************************/	514	/*****************************************************************************/
216		515
217	typedef struct	516	typedef struct
218	{	517	{
219	struct ev_signal *head;	518	WL head;
220	sig_atomic_t gotsig;	519	sig_atomic_t volatile gotsig;
221	} ANSIG;	520	} ANSIG;
222		521
223	static ANSIG *signals;	522	static ANSIG *signals;
224	static int signalmax;	523	static int signalmax;
225		524
226	static int sigpipe [2];	525	static int sigpipe [2];
227	static sig_atomic_t gotsig;	526	static sig_atomic_t volatile gotsig;
228	static struct ev_io sigev;	527	static struct ev_io sigev;
229		528
230	static void	529	static void
231	signals_init (ANSIG *base, int count)	530	signals_init (ANSIG *base, int count)
232	{	531	{
233	while (count--)	532	while (count--)
234	{	533	{
235	base->head = 0;	534	base->head = 0;
236	base->gotsig = 0;	535	base->gotsig = 0;
		536
237	++base;	537	++base;
238	}	538	}
239	}	539	}
240		540
241	static void	541	static void
242	sighandler (int signum)	542	sighandler (int signum)
243	{	543	{
		544	#if WIN32
		545	signal (signum, sighandler);
		546	#endif
		547
244	signals [signum - 1].gotsig = 1;	548	signals [signum - 1].gotsig = 1;
245		549
246	if (!gotsig)	550	if (!gotsig)
247	{	551	{
		552	int old_errno = errno;
248	gotsig = 1;	553	gotsig = 1;
		554	#ifdef WIN32
		555	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		556	#else
249	write (sigpipe [1], &gotsig, 1);	557	write (sigpipe [1], &signum, 1);
		558	#endif
		559	errno = old_errno;
250	}	560	}
251	}	561	}
252		562
		563	void
		564	ev_feed_signal_event (EV_P_ int signum)
		565	{
		566	#if EV_MULTIPLICITY
		567	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		568	#endif
		569
		570	--signum;
		571
		572	if (signum < 0 \|\| signum >= signalmax)
		573	return;
		574
		575	signals [signum].gotsig = 0;
		576
		577	for (w = signals [signum].head; w; w = w->next)
		578	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		579	}
		580
253	static void	581	static void
254	sigcb (struct ev_io *iow, int revents)	582	sigcb (EV_P_ struct ev_io *iow, int revents)
255	{	583	{
256	struct ev_signal *w;	584	WL w;
257	int sig;	585	int signum;
258		586
		587	#ifdef WIN32
		588	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		589	#else
		590	read (sigpipe [0], &revents, 1);
		591	#endif
259	gotsig = 0;	592	gotsig = 0;
260	read (sigpipe [0], &revents, 1);
261		593
262	for (sig = signalmax; sig--; )	594	for (signum = signalmax; signum--; )
263	if (signals [sig].gotsig)	595	if (signals [signum].gotsig)
264	{	596	sigevent (EV_A_ signum + 1);
265	signals [sig].gotsig = 0;
266
267	for (w = signals [sig].head; w; w = w->next)
268	event ((W)w, EV_SIGNAL);
269	}
270	}	597	}
271		598
272	static void	599	static void
273	siginit (void)	600	siginit (EV_P)
274	{	601	{
		602	#ifndef WIN32
275	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	603	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
276	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	604	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
277		605
278	/* rather than sort out wether we really need nb, set it */	606	/* rather than sort out wether we really need nb, set it */
279	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	607	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
280	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	608	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		609	#endif
281		610
282	evio_set (&sigev, sigpipe [0], EV_READ);	611	ev_io_set (&sigev, sigpipe [0], EV_READ);
283	evio_start (&sigev);	612	ev_io_start (EV_A_ &sigev);
		613	ev_unref (EV_A); /* child watcher should not keep loop alive */
284	}	614	}
285		615
286	/*****************************************************************************/	616	/*****************************************************************************/
287		617
288	static struct ev_idle **idles;	618	static struct ev_child *childs [PID_HASHSIZE];
289	static int idlemax, idlecnt;
290		619
291	static struct ev_check **checks;	620	#ifndef WIN32
292	static int checkmax, checkcnt;	621
		622	static struct ev_signal childev;
		623
		624	#ifndef WCONTINUED
		625	# define WCONTINUED 0
		626	#endif
		627
		628	static void
		629	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		630	{
		631	struct ev_child *w;
		632
		633	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		634	if (w->pid == pid \|\| !w->pid)
		635	{
		636	ev_priority (w) = ev_priority (sw); /* need to do it now */
		637	w->rpid = pid;
		638	w->rstatus = status;
		639	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		640	}
		641	}
		642
		643	static void
		644	childcb (EV_P_ struct ev_signal *sw, int revents)
		645	{
		646	int pid, status;
		647
		648	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		649	{
		650	/* make sure we are called again until all childs have been reaped */
		651	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		652
		653	child_reap (EV_A_ sw, pid, pid, status);
		654	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		655	}
		656	}
		657
		658	#endif
293		659
294	/*****************************************************************************/	660	/*****************************************************************************/
295		661
		662	#if EV_USE_KQUEUE
		663	# include "ev_kqueue.c"
		664	#endif
296	#if HAVE_EPOLL	665	#if EV_USE_EPOLL
297	# include "ev_epoll.c"	666	# include "ev_epoll.c"
298	#endif	667	#endif
		668	#if EV_USE_POLL
		669	# include "ev_poll.c"
		670	#endif
299	#if HAVE_SELECT	671	#if EV_USE_SELECT
300	# include "ev_select.c"	672	# include "ev_select.c"
301	#endif	673	#endif
302		674
303	int ev_init (int flags)	675	int
		676	ev_version_major (void)
304	{	677	{
		678	return EV_VERSION_MAJOR;
		679	}
		680
		681	int
		682	ev_version_minor (void)
		683	{
		684	return EV_VERSION_MINOR;
		685	}
		686
		687	/* return true if we are running with elevated privileges and should ignore env variables */
		688	static int
		689	enable_secure (void)
		690	{
		691	#ifdef WIN32
		692	return 0;
		693	#else
		694	return getuid () != geteuid ()
		695	\|\| getgid () != getegid ();
		696	#endif
		697	}
		698
		699	int
		700	ev_method (EV_P)
		701	{
		702	return method;
		703	}
		704
		705	static void
		706	loop_init (EV_P_ int methods)
		707	{
		708	if (!method)
		709	{
305	#if HAVE_MONOTONIC	710	#if EV_USE_MONOTONIC
306	{	711	{
307	struct timespec ts;	712	struct timespec ts;
308	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	713	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
309	have_monotonic = 1;	714	have_monotonic = 1;
310	}	715	}
311	#endif	716	#endif
312		717
313	ev_now = ev_time ();	718	rt_now = ev_time ();
314	now = get_clock ();	719	mn_now = get_clock ();
315	diff = ev_now - now;	720	now_floor = mn_now;
		721	rtmn_diff = rt_now - mn_now;
316		722
		723	if (methods == EVMETHOD_AUTO)
		724	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		725	methods = atoi (getenv ("LIBEV_METHODS"));
		726	else
		727	methods = EVMETHOD_ANY;
		728
		729	method = 0;
		730	#if EV_USE_WIN32
		731	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		732	#endif
		733	#if EV_USE_KQUEUE
		734	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		735	#endif
		736	#if EV_USE_EPOLL
		737	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		738	#endif
		739	#if EV_USE_POLL
		740	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		741	#endif
		742	#if EV_USE_SELECT
		743	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		744	#endif
		745
		746	ev_watcher_init (&sigev, sigcb);
		747	ev_set_priority (&sigev, EV_MAXPRI);
		748	}
		749	}
		750
		751	void
		752	loop_destroy (EV_P)
		753	{
		754	int i;
		755
		756	#if EV_USE_WIN32
		757	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		758	#endif
		759	#if EV_USE_KQUEUE
		760	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		761	#endif
		762	#if EV_USE_EPOLL
		763	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		764	#endif
		765	#if EV_USE_POLL
		766	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		767	#endif
		768	#if EV_USE_SELECT
		769	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		770	#endif
		771
		772	for (i = NUMPRI; i--; )
		773	array_free (pending, [i]);
		774
		775	/* have to use the microsoft-never-gets-it-right macro */
		776	array_free_microshit (fdchange);
		777	array_free_microshit (timer);
		778	array_free_microshit (periodic);
		779	array_free_microshit (idle);
		780	array_free_microshit (prepare);
		781	array_free_microshit (check);
		782
		783	method = 0;
		784	}
		785
		786	static void
		787	loop_fork (EV_P)
		788	{
		789	#if EV_USE_EPOLL
		790	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		791	#endif
		792	#if EV_USE_KQUEUE
		793	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		794	#endif
		795
		796	if (ev_is_active (&sigev))
		797	{
		798	/* default loop */
		799
		800	ev_ref (EV_A);
		801	ev_io_stop (EV_A_ &sigev);
		802	close (sigpipe [0]);
		803	close (sigpipe [1]);
		804
		805	while (pipe (sigpipe))
		806	syserr ("(libev) error creating pipe");
		807
		808	siginit (EV_A);
		809	}
		810
		811	postfork = 0;
		812	}
		813
		814	#if EV_MULTIPLICITY
		815	struct ev_loop *
		816	ev_loop_new (int methods)
		817	{
		818	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		819
		820	memset (loop, 0, sizeof (struct ev_loop));
		821
		822	loop_init (EV_A_ methods);
		823
		824	if (ev_method (EV_A))
		825	return loop;
		826
		827	return 0;
		828	}
		829
		830	void
		831	ev_loop_destroy (EV_P)
		832	{
		833	loop_destroy (EV_A);
		834	ev_free (loop);
		835	}
		836
		837	void
		838	ev_loop_fork (EV_P)
		839	{
		840	postfork = 1;
		841	}
		842
		843	#endif
		844
		845	#if EV_MULTIPLICITY
		846	struct ev_loop default_loop_struct;
		847	static struct ev_loop *default_loop;
		848
		849	struct ev_loop *
		850	#else
		851	static int default_loop;
		852
		853	int
		854	#endif
		855	ev_default_loop (int methods)
		856	{
		857	if (sigpipe [0] == sigpipe [1])
317	if (pipe (sigpipe))	858	if (pipe (sigpipe))
318	return 0;	859	return 0;
319		860
320	ev_method = EVMETHOD_NONE;	861	if (!default_loop)
321	#if HAVE_EPOLL	862	{
322	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	863	#if EV_MULTIPLICITY
		864	struct ev_loop *loop = default_loop = &default_loop_struct;
		865	#else
		866	default_loop = 1;
323	#endif	867	#endif
324	#if HAVE_SELECT
325	if (ev_method == EVMETHOD_NONE) select_init (flags);
326	#endif
327		868
		869	loop_init (EV_A_ methods);
		870
		871	if (ev_method (EV_A))
		872	{
		873	siginit (EV_A);
		874
		875	#ifndef WIN32
		876	ev_signal_init (&childev, childcb, SIGCHLD);
		877	ev_set_priority (&childev, EV_MAXPRI);
		878	ev_signal_start (EV_A_ &childev);
		879	ev_unref (EV_A); /* child watcher should not keep loop alive */
		880	#endif
		881	}
		882	else
		883	default_loop = 0;
		884	}
		885
		886	return default_loop;
		887	}
		888
		889	void
		890	ev_default_destroy (void)
		891	{
		892	#if EV_MULTIPLICITY
		893	struct ev_loop *loop = default_loop;
		894	#endif
		895
		896	#ifndef WIN32
		897	ev_ref (EV_A); /* child watcher */
		898	ev_signal_stop (EV_A_ &childev);
		899	#endif
		900
		901	ev_ref (EV_A); /* signal watcher */
		902	ev_io_stop (EV_A_ &sigev);
		903
		904	close (sigpipe [0]); sigpipe [0] = 0;
		905	close (sigpipe [1]); sigpipe [1] = 0;
		906
		907	loop_destroy (EV_A);
		908	}
		909
		910	void
		911	ev_default_fork (void)
		912	{
		913	#if EV_MULTIPLICITY
		914	struct ev_loop *loop = default_loop;
		915	#endif
		916
328	if (ev_method)	917	if (method)
329	{	918	postfork = 1;
330	evw_init (&sigev, sigcb, 0);
331	siginit ();
332	}
333
334	return ev_method;
335	}	919	}
336		920
337	/*****************************************************************************/	921	/*****************************************************************************/
338		922
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	923	static int
364	fd_reify (void)	924	any_pending (EV_P)
365	{	925	{
366	int i;	926	int pri;
367		927
368	for (i = 0; i < fdchangecnt; ++i)	928	for (pri = NUMPRI; pri--; )
369	{	929	if (pendingcnt [pri])
370	int fd = fdchanges [i];	930	return 1;
371	ANFD *anfd = anfds + fd;
372	struct ev_io *w;
373		931
374	int wev = 0;	932	return 0;
375
376	for (w = anfd->head; w; w = w->next)
377	wev \|= w->events;
378
379	if (anfd->wev != wev)
380	{
381	method_modify (fd, anfd->wev, wev);
382	anfd->wev = wev;
383	}
384	}
385
386	fdchangecnt = 0;
387	}	933	}
388		934
389	static void	935	static void
390	call_pending ()	936	call_pending (EV_P)
391	{	937	{
392	int i;	938	int pri;
393		939
394	for (i = 0; i < pendingcnt; ++i)	940	for (pri = NUMPRI; pri--; )
		941	while (pendingcnt [pri])
395	{	942	{
396	ANPENDING *p = pendings + i;	943	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
397		944
398	if (p->w)	945	if (p->w)
399	{	946	{
400	p->w->pending = 0;	947	p->w->pending = 0;
401	p->w->cb (p->w, p->events);	948	p->w->cb (EV_A_ p->w, p->events);
402	}	949	}
403	}	950	}
404
405	pendingcnt = 0;
406	}	951	}
407		952
408	static void	953	static void
409	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	954	timers_reify (EV_P)
410	{	955	{
411	while (timercnt && timers [0]->at <= now)	956	while (timercnt && ((WT)timers [0])->at <= mn_now)
412	{	957	{
413	struct ev_timer *w = timers [0];	958	struct ev_timer *w = timers [0];
		959
		960	assert (("inactive timer on timer heap detected", ev_is_active (w)));
414		961
415	/* first reschedule or stop timer */	962	/* first reschedule or stop timer */
416	if (w->repeat)	963	if (w->repeat)
417	{	964	{
418	if (w->is_abs)	965	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;
420	else
421	w->at = now + w->repeat;	966	((WT)w)->at = mn_now + w->repeat;
422
423	assert (w->at > now);
424
425	downheap (timers, timercnt, 0);	967	downheap ((WT *)timers, timercnt, 0);
426	}	968	}
427	else	969	else
		970	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		971
		972	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		973	}
		974	}
		975
		976	static void
		977	periodics_reify (EV_P)
		978	{
		979	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
		980	{
		981	struct ev_periodic *w = periodics [0];
		982
		983	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		984
		985	/* first reschedule or stop timer */
		986	if (w->reschedule_cb)
428	{	987	{
429	evtimer_stop (w); /* nonrepeating: stop timer */	988	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001);
430	--timercnt; /* maybe pass by reference instead? */	989
		990	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));
		991	downheap ((WT *)periodics, periodiccnt, 0);
431	}	992	}
		993	else if (w->interval)
		994	{
		995	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
		996	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
		997	downheap ((WT *)periodics, periodiccnt, 0);
		998	}
		999	else
		1000	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
432		1001
433	event ((W)w, EV_TIMEOUT);	1002	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
434	}	1003	}
435	}	1004	}
436		1005
437	static void	1006	static void
438	time_update ()	1007	periodics_reschedule (EV_P)
439	{	1008	{
440	int i;	1009	int i;
		1010
		1011	/* adjust periodics after time jump */
		1012	for (i = 0; i < periodiccnt; ++i)
		1013	{
		1014	struct ev_periodic *w = periodics [i];
		1015
		1016	if (w->reschedule_cb)
		1017	((WT)w)->at = w->reschedule_cb (w, rt_now);
		1018	else if (w->interval)
		1019	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1020	}
		1021
		1022	/* now rebuild the heap */
		1023	for (i = periodiccnt >> 1; i--; )
		1024	downheap ((WT *)periodics, periodiccnt, i);
		1025	}
		1026
		1027	inline int
		1028	time_update_monotonic (EV_P)
		1029	{
		1030	mn_now = get_clock ();
		1031
		1032	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1033	{
		1034	rt_now = rtmn_diff + mn_now;
		1035	return 0;
		1036	}
		1037	else
		1038	{
		1039	now_floor = mn_now;
441	ev_now = ev_time ();	1040	rt_now = ev_time ();
442		1041	return 1;
443	if (have_monotonic)
444	{	1042	}
445	ev_tstamp odiff = diff;	1043	}
446		1044
447	/* detecting time jumps is much more difficult */	1045	static void
448	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1046	time_update (EV_P)
		1047	{
		1048	int i;
		1049
		1050	#if EV_USE_MONOTONIC
		1051	if (expect_true (have_monotonic))
		1052	{
		1053	if (time_update_monotonic (EV_A))
449	{	1054	{
450	now = get_clock ();	1055	ev_tstamp odiff = rtmn_diff;
		1056
		1057	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1058	{
451	diff = ev_now - now;	1059	rtmn_diff = rt_now - mn_now;
452		1060
453	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1061	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
454	return; /* all is well */	1062	return; /* all is well */
455		1063
456	ev_now = ev_time ();	1064	rt_now = ev_time ();
		1065	mn_now = get_clock ();
		1066	now_floor = mn_now;
		1067	}
		1068
		1069	periodics_reschedule (EV_A);
		1070	/* no timer adjustment, as the monotonic clock doesn't jump */
		1071	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
457	}	1072	}
		1073	}
		1074	else
		1075	#endif
		1076	{
		1077	rt_now = ev_time ();
458		1078
459	/* time jump detected, reschedule atimers */	1079	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
460	for (i = 0; i < atimercnt; ++i)
461	{	1080	{
462	struct ev_timer *w = atimers [i];	1081	periodics_reschedule (EV_A);
463	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1082
		1083	/* adjust timers. this is easy, as the offset is the same for all */
		1084	for (i = 0; i < timercnt; ++i)
		1085	((WT)timers [i])->at += rt_now - mn_now;
464	}	1086	}
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		1087
473	now = ev_now;	1088	mn_now = rt_now;
474	}	1089	}
475	}	1090	}
476		1091
477	int ev_loop_done;	1092	void
		1093	ev_ref (EV_P)
		1094	{
		1095	++activecnt;
		1096	}
478		1097
		1098	void
		1099	ev_unref (EV_P)
		1100	{
		1101	--activecnt;
		1102	}
		1103
		1104	static int loop_done;
		1105
		1106	void
479	void ev_loop (int flags)	1107	ev_loop (EV_P_ int flags)
480	{	1108	{
481	double block;	1109	double block;
482	ev_loop_done = flags & EVLOOP_ONESHOT;	1110	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		1111
490	do	1112	do
491	{	1113	{
		1114	/* queue check watchers (and execute them) */
		1115	if (expect_false (preparecnt))
		1116	{
		1117	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1118	call_pending (EV_A);
		1119	}
		1120
		1121	/* we might have forked, so reify kernel state if necessary */
		1122	if (expect_false (postfork))
		1123	loop_fork (EV_A);
		1124
492	/* update fd-related kernel structures */	1125	/* update fd-related kernel structures */
493	fd_reify ();	1126	fd_reify (EV_A);
494		1127
495	/* calculate blocking time */	1128	/* calculate blocking time */
		1129
		1130	/* we only need this for !monotonic clock or timers, but as we basically
		1131	always have timers, we just calculate it always */
		1132	#if EV_USE_MONOTONIC
		1133	if (expect_true (have_monotonic))
		1134	time_update_monotonic (EV_A);
		1135	else
		1136	#endif
		1137	{
		1138	rt_now = ev_time ();
		1139	mn_now = rt_now;
		1140	}
		1141
496	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1142	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
497	block = 0.;	1143	block = 0.;
498	else	1144	else
499	{	1145	{
500	block = MAX_BLOCKTIME;	1146	block = MAX_BLOCKTIME;
501		1147
502	if (rtimercnt)	1148	if (timercnt)
503	{	1149	{
504	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1150	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
505	if (block > to) block = to;	1151	if (block > to) block = to;
506	}	1152	}
507		1153
508	if (atimercnt)	1154	if (periodiccnt)
509	{	1155	{
510	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1156	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
511	if (block > to) block = to;	1157	if (block > to) block = to;
512	}	1158	}
513		1159
514	if (block < 0.) block = 0.;	1160	if (block < 0.) block = 0.;
515	}	1161	}
516		1162
517	method_poll (block);	1163	method_poll (EV_A_ block);
518		1164
519	/* update ev_now, do magic */	1165	/* update rt_now, do magic */
520	time_update ();	1166	time_update (EV_A);
521		1167
522	/* queue pending timers and reschedule them */	1168	/* queue pending timers and reschedule them */
523	/* absolute timers first */	1169	timers_reify (EV_A); /* relative timers called last */
524	timers_reify (atimers, atimercnt, ev_now);	1170	periodics_reify (EV_A); /* absolute timers called first */
525	/* relative timers second */
526	timers_reify (rtimers, rtimercnt, now);
527		1171
528	/* queue idle watchers unless io or timers are pending */	1172	/* queue idle watchers unless io or timers are pending */
529	if (!pendingcnt)	1173	if (idlecnt && !any_pending (EV_A))
530	queue_events ((W *)idles, idlecnt, EV_IDLE);	1174	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
531		1175
532	/* queue check and possibly idle watchers */	1176	/* queue check watchers, to be executed first */
		1177	if (checkcnt)
533	queue_events ((W *)checks, checkcnt, EV_CHECK);	1178	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
534		1179
535	call_pending ();	1180	call_pending (EV_A);
536	}	1181	}
537	while (!ev_loop_done);	1182	while (activecnt && !loop_done);
		1183
		1184	if (loop_done != 2)
		1185	loop_done = 0;
		1186	}
		1187
		1188	void
		1189	ev_unloop (EV_P_ int how)
		1190	{
		1191	loop_done = how;
538	}	1192	}
539		1193
540	/*****************************************************************************/	1194	/*****************************************************************************/
541		1195
542	static void	1196	inline void
543	wlist_add (WL *head, WL elem)	1197	wlist_add (WL *head, WL elem)
544	{	1198	{
545	elem->next = *head;	1199	elem->next = *head;
546	*head = elem;	1200	*head = elem;
547	}	1201	}
548		1202
549	static void	1203	inline void
550	wlist_del (WL *head, WL elem)	1204	wlist_del (WL *head, WL elem)
551	{	1205	{
552	while (*head)	1206	while (*head)
553	{	1207	{
554	if (*head == elem)	1208	if (*head == elem)
559		1213
560	head = &(*head)->next;	1214	head = &(*head)->next;
561	}	1215	}
562	}	1216	}
563		1217
564	static void	1218	inline void
		1219	ev_clear_pending (EV_P_ W w)
		1220	{
		1221	if (w->pending)
		1222	{
		1223	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1224	w->pending = 0;
		1225	}
		1226	}
		1227
		1228	inline void
565	ev_start (W w, int active)	1229	ev_start (EV_P_ W w, int active)
566	{	1230	{
567	w->pending = 0;	1231	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1232	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1233
568	w->active = active;	1234	w->active = active;
		1235	ev_ref (EV_A);
569	}	1236	}
570		1237
571	static void	1238	inline void
572	ev_stop (W w)	1239	ev_stop (EV_P_ W w)
573	{	1240	{
574	if (w->pending)	1241	ev_unref (EV_A);
575	pendings [w->pending - 1].w = 0;
576
577	w->active = 0;	1242	w->active = 0;
578	/* nop */
579	}	1243	}
580		1244
581	/*****************************************************************************/	1245	/*****************************************************************************/
582		1246
583	void	1247	void
584	evio_start (struct ev_io *w)	1248	ev_io_start (EV_P_ struct ev_io *w)
585	{	1249	{
		1250	int fd = w->fd;
		1251
586	if (ev_is_active (w))	1252	if (ev_is_active (w))
587	return;	1253	return;
588		1254
589	int fd = w->fd;	1255	assert (("ev_io_start called with negative fd", fd >= 0));
590		1256
591	ev_start ((W)w, 1);	1257	ev_start (EV_A_ (W)w, 1);
592	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1258	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
593	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1259	wlist_add ((WL *)&anfds[fd].head, (WL)w);
594		1260
595	++fdchangecnt;	1261	fd_change (EV_A_ fd);
596	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
597	fdchanges [fdchangecnt - 1] = fd;
598	}	1262	}
599		1263
600	void	1264	void
601	evio_stop (struct ev_io *w)	1265	ev_io_stop (EV_P_ struct ev_io *w)
602	{	1266	{
		1267	ev_clear_pending (EV_A_ (W)w);
603	if (!ev_is_active (w))	1268	if (!ev_is_active (w))
604	return;	1269	return;
605		1270
606	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1271	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
607	ev_stop ((W)w);	1272	ev_stop (EV_A_ (W)w);
608		1273
609	++fdchangecnt;	1274	fd_change (EV_A_ w->fd);
610	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
611	fdchanges [fdchangecnt - 1] = w->fd;
612	}	1275	}
613		1276
614	void	1277	void
615	evtimer_start (struct ev_timer *w)	1278	ev_timer_start (EV_P_ struct ev_timer *w)
616	{	1279	{
617	if (ev_is_active (w))	1280	if (ev_is_active (w))
618	return;	1281	return;
619		1282
620	if (w->is_abs)	1283	((WT)w)->at += mn_now;
		1284
		1285	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1286
		1287	ev_start (EV_A_ (W)w, ++timercnt);
		1288	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
		1289	timers [timercnt - 1] = w;
		1290	upheap ((WT *)timers, timercnt - 1);
		1291
		1292	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1293	}
		1294
		1295	void
		1296	ev_timer_stop (EV_P_ struct ev_timer *w)
		1297	{
		1298	ev_clear_pending (EV_A_ (W)w);
		1299	if (!ev_is_active (w))
		1300	return;
		1301
		1302	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1303
		1304	if (((W)w)->active < timercnt--)
		1305	{
		1306	timers [((W)w)->active - 1] = timers [timercnt];
		1307	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
621	{	1308	}
622	/* this formula differs from the one in timer_reify becuse we do not round up */	1309
		1310	((WT)w)->at = w->repeat;
		1311
		1312	ev_stop (EV_A_ (W)w);
		1313	}
		1314
		1315	void
		1316	ev_timer_again (EV_P_ struct ev_timer *w)
		1317	{
		1318	if (ev_is_active (w))
		1319	{
623	if (w->repeat)	1320	if (w->repeat)
624	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1321	{
625		1322	((WT)w)->at = mn_now + w->repeat;
626	ev_start ((W)w, ++atimercnt);	1323	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
627	array_needsize (atimers, atimermax, atimercnt, );	1324	}
628	atimers [atimercnt - 1] = w;
629	upheap (atimers, atimercnt - 1);
630	}
631	else	1325	else
		1326	ev_timer_stop (EV_A_ w);
632	{	1327	}
633	w->at += now;	1328	else if (w->repeat)
		1329	ev_timer_start (EV_A_ w);
		1330	}
634		1331
635	ev_start ((W)w, ++rtimercnt);	1332	void
636	array_needsize (rtimers, rtimermax, rtimercnt, );	1333	ev_periodic_start (EV_P_ struct ev_periodic *w)
637	rtimers [rtimercnt - 1] = w;	1334	{
638	upheap (rtimers, rtimercnt - 1);	1335	if (ev_is_active (w))
		1336	return;
		1337
		1338	if (w->reschedule_cb)
		1339	((WT)w)->at = w->reschedule_cb (w, rt_now);
		1340	else if (w->interval)
639	}	1341	{
		1342	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1343	/* this formula differs from the one in periodic_reify because we do not always round up */
		1344	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1345	}
640		1346
641	}	1347	ev_start (EV_A_ (W)w, ++periodiccnt);
		1348	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
		1349	periodics [periodiccnt - 1] = w;
		1350	upheap ((WT *)periodics, periodiccnt - 1);
642		1351
		1352	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1353	}
		1354
643	void	1355	void
644	evtimer_stop (struct ev_timer *w)	1356	ev_periodic_stop (EV_P_ struct ev_periodic *w)
645	{	1357	{
		1358	ev_clear_pending (EV_A_ (W)w);
646	if (!ev_is_active (w))	1359	if (!ev_is_active (w))
647	return;	1360	return;
648		1361
649	if (w->is_abs)	1362	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
650	{	1363
651	if (w->active < atimercnt--)	1364	if (((W)w)->active < periodiccnt--)
652	{
653	atimers [w->active - 1] = atimers [atimercnt];
654	downheap (atimers, atimercnt, w->active - 1);
655	}
656	}	1365	{
657	else	1366	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1367	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
658	{	1368	}
659	if (w->active < rtimercnt--)
660	{
661	rtimers [w->active - 1] = rtimers [rtimercnt];
662	downheap (rtimers, rtimercnt, w->active - 1);
663	}
664	}
665		1369
666	ev_stop ((W)w);	1370	ev_stop (EV_A_ (W)w);
667	}	1371	}
668		1372
669	void	1373	void
670	evsignal_start (struct ev_signal *w)	1374	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1375	{
		1376	ev_periodic_stop (EV_A_ w);
		1377	ev_periodic_start (EV_A_ w);
		1378	}
		1379
		1380	void
		1381	ev_idle_start (EV_P_ struct ev_idle *w)
671	{	1382	{
672	if (ev_is_active (w))	1383	if (ev_is_active (w))
673	return;	1384	return;
674		1385
		1386	ev_start (EV_A_ (W)w, ++idlecnt);
		1387	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1388	idles [idlecnt - 1] = w;
		1389	}
		1390
		1391	void
		1392	ev_idle_stop (EV_P_ struct ev_idle *w)
		1393	{
		1394	ev_clear_pending (EV_A_ (W)w);
		1395	if (ev_is_active (w))
		1396	return;
		1397
		1398	idles [((W)w)->active - 1] = idles [--idlecnt];
		1399	ev_stop (EV_A_ (W)w);
		1400	}
		1401
		1402	void
		1403	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1404	{
		1405	if (ev_is_active (w))
		1406	return;
		1407
		1408	ev_start (EV_A_ (W)w, ++preparecnt);
		1409	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1410	prepares [preparecnt - 1] = w;
		1411	}
		1412
		1413	void
		1414	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1415	{
		1416	ev_clear_pending (EV_A_ (W)w);
		1417	if (ev_is_active (w))
		1418	return;
		1419
		1420	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1421	ev_stop (EV_A_ (W)w);
		1422	}
		1423
		1424	void
		1425	ev_check_start (EV_P_ struct ev_check *w)
		1426	{
		1427	if (ev_is_active (w))
		1428	return;
		1429
		1430	ev_start (EV_A_ (W)w, ++checkcnt);
		1431	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1432	checks [checkcnt - 1] = w;
		1433	}
		1434
		1435	void
		1436	ev_check_stop (EV_P_ struct ev_check *w)
		1437	{
		1438	ev_clear_pending (EV_A_ (W)w);
		1439	if (ev_is_active (w))
		1440	return;
		1441
		1442	checks [((W)w)->active - 1] = checks [--checkcnt];
		1443	ev_stop (EV_A_ (W)w);
		1444	}
		1445
		1446	#ifndef SA_RESTART
		1447	# define SA_RESTART 0
		1448	#endif
		1449
		1450	void
		1451	ev_signal_start (EV_P_ struct ev_signal *w)
		1452	{
		1453	#if EV_MULTIPLICITY
		1454	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1455	#endif
		1456	if (ev_is_active (w))
		1457	return;
		1458
		1459	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1460
675	ev_start ((W)w, 1);	1461	ev_start (EV_A_ (W)w, 1);
676	array_needsize (signals, signalmax, w->signum, signals_init);	1462	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
677	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1463	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
678		1464
679	if (!w->next)	1465	if (!((WL)w)->next)
680	{	1466	{
		1467	#if WIN32
		1468	signal (w->signum, sighandler);
		1469	#else
681	struct sigaction sa;	1470	struct sigaction sa;
682	sa.sa_handler = sighandler;	1471	sa.sa_handler = sighandler;
683	sigfillset (&sa.sa_mask);	1472	sigfillset (&sa.sa_mask);
684	sa.sa_flags = 0;	1473	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
685	sigaction (w->signum, &sa, 0);	1474	sigaction (w->signum, &sa, 0);
		1475	#endif
686	}	1476	}
687	}	1477	}
688		1478
689	void	1479	void
690	evsignal_stop (struct ev_signal *w)	1480	ev_signal_stop (EV_P_ struct ev_signal *w)
691	{	1481	{
		1482	ev_clear_pending (EV_A_ (W)w);
692	if (!ev_is_active (w))	1483	if (!ev_is_active (w))
693	return;	1484	return;
694		1485
695	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1486	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
696	ev_stop ((W)w);	1487	ev_stop (EV_A_ (W)w);
697		1488
698	if (!signals [w->signum - 1].head)	1489	if (!signals [w->signum - 1].head)
699	signal (w->signum, SIG_DFL);	1490	signal (w->signum, SIG_DFL);
700	}	1491	}
701		1492
702	void evidle_start (struct ev_idle *w)	1493	void
		1494	ev_child_start (EV_P_ struct ev_child *w)
703	{	1495	{
		1496	#if EV_MULTIPLICITY
		1497	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1498	#endif
704	if (ev_is_active (w))	1499	if (ev_is_active (w))
705	return;	1500	return;
706		1501
707	ev_start ((W)w, ++idlecnt);	1502	ev_start (EV_A_ (W)w, 1);
708	array_needsize (idles, idlemax, idlecnt, );	1503	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
709	idles [idlecnt - 1] = w;
710	}	1504	}
711		1505
712	void evidle_stop (struct ev_idle *w)	1506	void
		1507	ev_child_stop (EV_P_ struct ev_child *w)
713	{	1508	{
714	idles [w->active - 1] = idles [--idlecnt];	1509	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))	1510	if (ev_is_active (w))
721	return;	1511	return;
722		1512
723	ev_start ((W)w, ++checkcnt);	1513	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);	1514	ev_stop (EV_A_ (W)w);
732	}	1515	}
733		1516
734	/*****************************************************************************/	1517	/*****************************************************************************/
735		1518
736	#if 0	1519	struct ev_once
737
738	static void
739	sin_cb (struct ev_io *w, int revents)
740	{	1520	{
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;	1521	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;	1522	struct ev_timer to;
790	evw_init (&t1, ocb, 0);	1523	void (cb)(int revents, void arg);
791	evtimer_set_abs (&t1, 5, 10);	1524	void *arg;
792	evtimer_start (&t1);	1525	};
793		1526
794	struct ev_signal sig;	1527	static void
795	evw_init (&sig, scb, 65535);	1528	once_cb (EV_P_ struct ev_once *once, int revents)
796	evsignal_set (&sig, SIGQUIT);	1529	{
797	evsignal_start (&sig);	1530	void (cb)(int revents, void arg) = once->cb;
		1531	void *arg = once->arg;
798		1532
799	struct ev_check cw;	1533	ev_io_stop (EV_A_ &once->io);
800	evw_init (&cw, gcb, 0);	1534	ev_timer_stop (EV_A_ &once->to);
801	evcheck_start (&cw);	1535	ev_free (once);
802		1536
803	struct ev_idle iw;	1537	cb (revents, arg);
804	evw_init (&iw, gcb, 0);
805	evidle_start (&iw);
806
807	ev_loop (0);
808
809	return 0;
810	}	1538	}
811		1539
812	#endif	1540	static void
		1541	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1542	{
		1543	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1544	}
813		1545
		1546	static void
		1547	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1548	{
		1549	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1550	}
814		1551
		1552	void
		1553	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1554	{
		1555	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
815		1556
		1557	if (!once)
		1558	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1559	else
		1560	{
		1561	once->cb = cb;
		1562	once->arg = arg;
816		1563
		1564	ev_watcher_init (&once->io, once_cb_io);
		1565	if (fd >= 0)
		1566	{
		1567	ev_io_set (&once->io, fd, events);
		1568	ev_io_start (EV_A_ &once->io);
		1569	}
		1570
		1571	ev_watcher_init (&once->to, once_cb_to);
		1572	if (timeout >= 0.)
		1573	{
		1574	ev_timer_set (&once->to, timeout, 0.);
		1575	ev_timer_start (EV_A_ &once->to);
		1576	}
		1577	}
		1578	}
		1579

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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 1.79 by root, Fri Nov 9 15:15:20 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 1.79 by root, Fri Nov 9 15:15:20 2007 UTC