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

Comparing libev/ev.c (file contents):
Revision 1.9 by root, Wed Oct 31 07:24:17 2007 UTC vs.
Revision 1.79 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
		78	#ifndef EV_USE_MONOTONIC
		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
		105	# endif
		106	#endif
		107
		108	#ifndef EV_USE_REALTIME
		109	# define EV_USE_REALTIME 1
		110	#endif
		111
		112	/**/
		113
14	#ifdef CLOCK_MONOTONIC	114	#ifndef CLOCK_MONOTONIC
		115	# undef EV_USE_MONOTONIC
15	# define HAVE_MONOTONIC 1	116	# define EV_USE_MONOTONIC 0
16	#endif	117	#endif
17		118
		119	#ifndef CLOCK_REALTIME
		120	# undef EV_USE_REALTIME
18	#define HAVE_REALTIME 1	121	# define EV_USE_REALTIME 0
19	#define HAVE_EPOLL 1	122	#endif
20	#define HAVE_SELECT 1	123
		124	/**/
21		125
22	#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) */
23	#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 */
24		130
25	#include "ev.h"	131	#include "ev.h"
26		132
		133	#if __GNUC__ >= 3
		134	# define expect(expr,value) __builtin_expect ((expr),(value))
		135	# define inline inline
		136	#else
		137	# define expect(expr,value) (expr)
		138	# define inline static
		139	#endif
		140
		141	#define expect_false(expr) expect ((expr) != 0, 0)
		142	#define expect_true(expr) expect ((expr) != 0, 1)
		143
		144	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		145	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		146
27	struct ev_watcher {	147	typedef struct ev_watcher *W;
28	EV_WATCHER (ev_watcher);	148	typedef struct ev_watcher_list *WL;
		149	typedef struct ev_watcher_time *WT;
		150
		151	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		152
		153	#include "ev_win32.c"
		154
		155	/*****************************************************************************/
		156
		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"
29	};	224	};
		225	# undef VAR
		226	# include "ev_wrap.h"
30		227
31	struct ev_watcher_list {	228	#else
32	EV_WATCHER_LIST (ev_watcher_list);
33	};
34		229
35	static ev_tstamp now, diff; /* monotonic clock */	230	# define VAR(name,decl) static decl;
36	ev_tstamp ev_now;	231	# include "ev_vars.h"
37	int ev_method;	232	# undef VAR
38		233
39	static int have_monotonic; /* runtime */	234	#endif
40
41	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
42	static void (*method_modify)(int fd, int oev, int nev);
43	static void (*method_poll)(ev_tstamp timeout);
44		235
45	/*****************************************************************************/	236	/*****************************************************************************/
46		237
47	ev_tstamp	238	inline ev_tstamp
48	ev_time (void)	239	ev_time (void)
49	{	240	{
50	#if HAVE_REALTIME	241	#if EV_USE_REALTIME
51	struct timespec ts;	242	struct timespec ts;
52	clock_gettime (CLOCK_REALTIME, &ts);	243	clock_gettime (CLOCK_REALTIME, &ts);
53	return ts.tv_sec + ts.tv_nsec * 1e-9;	244	return ts.tv_sec + ts.tv_nsec * 1e-9;
54	#else	245	#else
55	struct timeval tv;	246	struct timeval tv;
56	gettimeofday (&tv, 0);	247	gettimeofday (&tv, 0);
57	return tv.tv_sec + tv.tv_usec * 1e-6;	248	return tv.tv_sec + tv.tv_usec * 1e-6;
58	#endif	249	#endif
59	}	250	}
60		251
61	static ev_tstamp	252	inline ev_tstamp
62	get_clock (void)	253	get_clock (void)
63	{	254	{
64	#if HAVE_MONOTONIC	255	#if EV_USE_MONOTONIC
65	if (have_monotonic)	256	if (expect_true (have_monotonic))
66	{	257	{
67	struct timespec ts;	258	struct timespec ts;
68	clock_gettime (CLOCK_MONOTONIC, &ts);	259	clock_gettime (CLOCK_MONOTONIC, &ts);
69	return ts.tv_sec + ts.tv_nsec * 1e-9;	260	return ts.tv_sec + ts.tv_nsec * 1e-9;
70	}	261	}
71	#endif	262	#endif
72		263
73	return ev_time ();	264	return ev_time ();
74	}	265	}
75		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
76	#define array_needsize(base,cur,cnt,init) \	275	#define array_needsize(type,base,cur,cnt,init) \
77	if ((cnt) > cur) \	276	if (expect_false ((cnt) > cur)) \
78	{ \	277	{ \
79	int newcnt = cur ? cur << 1 : 16; \	278	int newcnt = cur; \
80	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	\
81	base = realloc (base, sizeof (base) (newcnt)); \	285	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
82	init (base + cur, newcnt - cur); \	286	init (base + cur, newcnt - cur); \
83	cur = newcnt; \	287	cur = newcnt; \
84	}	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;
85		305
86	/*****************************************************************************/	306	/*****************************************************************************/
87		307
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	308	static void
101	anfds_init (ANFD *base, int count)	309	anfds_init (ANFD *base, int count)
102	{	310	{
103	while (count--)	311	while (count--)
104	{	312	{
105	base->head = 0;	313	base->head = 0;
106	base->wev = base->rev = EV_NONE;	314	base->events = EV_NONE;
		315	base->reify = 0;
		316
107	++base;	317	++base;
108	}	318	}
109	}	319	}
110		320
111	typedef struct	321	void
		322	ev_feed_event (EV_P_ void *w, int revents)
112	{	323	{
113	struct ev_watcher *w;	324	W w_ = (W)w;
114	int events;
115	} ANPENDING;
116		325
117	static ANPENDING *pendings;	326	if (w_->pending)
118	static int pendingmax, pendingcnt;	327	{
		328	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		329	return;
		330	}
119		331
120	static void
121	event (struct ev_watcher *w, int events)
122	{
123	w->pending = ++pendingcnt;	332	w_->pending = ++pendingcnt [ABSPRI (w_)];
124	array_needsize (pendings, pendingmax, pendingcnt, );	333	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
125	pendings [pendingcnt - 1].w = w;	334	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
126	pendings [pendingcnt - 1].events = events;	335	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
127	}	336	}
128		337
129	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
130	fd_event (int fd, int events)	348	fd_event (EV_P_ int fd, int revents)
131	{	349	{
132	ANFD *anfd = anfds + fd;	350	ANFD *anfd = anfds + fd;
133	struct ev_io *w;	351	struct ev_io *w;
134		352
135	for (w = anfd->head; w; w = w->next)	353	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
136	{	354	{
137	int ev = w->events & events;	355	int ev = w->events & revents;
138		356
139	if (ev)	357	if (ev)
140	event ((struct ev_watcher *)w, ev);	358	ev_feed_event (EV_A_ (W)w, ev);
141	}	359	}
142	}	360	}
143		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
144	static void	370	static void
145	queue_events (struct ev_watcher **events, int eventcnt, int type)	371	fd_reify (EV_P)
146	{	372	{
147	int i;	373	int i;
148		374
149	for (i = 0; i < eventcnt; ++i)	375	for (i = 0; i < fdchangecnt; ++i)
150	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	}
151	}	469	}
152		470
153	/*****************************************************************************/	471	/*****************************************************************************/
154		472
155	static struct ev_timer **atimers;
156	static int atimermax, atimercnt;
157
158	static struct ev_timer **rtimers;
159	static int rtimermax, rtimercnt;
160
161	static void	473	static void
162	upheap (struct ev_timer **timers, int k)	474	upheap (WT *heap, int k)
163	{	475	{
164	struct ev_timer *w = timers [k];	476	WT w = heap [k];
165		477
166	while (k && timers [k >> 1]->at > w->at)	478	while (k && heap [k >> 1]->at > w->at)
167	{	479	{
168	timers [k] = timers [k >> 1];	480	heap [k] = heap [k >> 1];
169	timers [k]->active = k + 1;	481	((W)heap [k])->active = k + 1;
170	k >>= 1;	482	k >>= 1;
171	}	483	}
172		484
173	timers [k] = w;	485	heap [k] = w;
174	timers [k]->active = k + 1;	486	((W)heap [k])->active = k + 1;
175		487
176	}	488	}
177		489
178	static void	490	static void
179	downheap (struct ev_timer **timers, int N, int k)	491	downheap (WT *heap, int N, int k)
180	{	492	{
181	struct ev_timer *w = timers [k];	493	WT w = heap [k];
182		494
183	while (k < (N >> 1))	495	while (k < (N >> 1))
184	{	496	{
185	int j = k << 1;	497	int j = k << 1;
186		498
187	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	499	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
188	++j;	500	++j;
189		501
190	if (w->at <= timers [j]->at)	502	if (w->at <= heap [j]->at)
191	break;	503	break;
192		504
193	timers [k] = timers [j];	505	heap [k] = heap [j];
194	timers [k]->active = k + 1;	506	((W)heap [k])->active = k + 1;
195	k = j;	507	k = j;
196	}	508	}
197		509
198	timers [k] = w;	510	heap [k] = w;
199	timers [k]->active = k + 1;	511	((W)heap [k])->active = k + 1;
200	}	512	}
201		513
202	/*****************************************************************************/	514	/*****************************************************************************/
203		515
204	typedef struct	516	typedef struct
205	{	517	{
206	struct ev_signal *head;	518	WL head;
207	sig_atomic_t gotsig;	519	sig_atomic_t volatile gotsig;
208	} ANSIG;	520	} ANSIG;
209		521
210	static ANSIG *signals;	522	static ANSIG *signals;
211	static int signalmax;	523	static int signalmax;
212		524
213	static int sigpipe [2];	525	static int sigpipe [2];
214	static sig_atomic_t gotsig;	526	static sig_atomic_t volatile gotsig;
215	static struct ev_io sigev;	527	static struct ev_io sigev;
216		528
217	static void	529	static void
218	signals_init (ANSIG *base, int count)	530	signals_init (ANSIG *base, int count)
219	{	531	{
220	while (count--)	532	while (count--)
221	{	533	{
222	base->head = 0;	534	base->head = 0;
223	base->gotsig = 0;	535	base->gotsig = 0;
		536
224	++base;	537	++base;
225	}	538	}
226	}	539	}
227		540
228	static void	541	static void
229	sighandler (int signum)	542	sighandler (int signum)
230	{	543	{
		544	#if WIN32
		545	signal (signum, sighandler);
		546	#endif
		547
231	signals [signum - 1].gotsig = 1;	548	signals [signum - 1].gotsig = 1;
232		549
233	if (!gotsig)	550	if (!gotsig)
234	{	551	{
		552	int old_errno = errno;
235	gotsig = 1;	553	gotsig = 1;
		554	#ifdef WIN32
		555	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		556	#else
236	write (sigpipe [1], &gotsig, 1);	557	write (sigpipe [1], &signum, 1);
		558	#endif
		559	errno = old_errno;
237	}	560	}
238	}	561	}
239		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
240	static void	581	static void
241	sigcb (struct ev_io *iow, int revents)	582	sigcb (EV_P_ struct ev_io *iow, int revents)
242	{	583	{
243	struct ev_signal *w;	584	WL w;
244	int sig;	585	int signum;
245		586
		587	#ifdef WIN32
		588	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		589	#else
		590	read (sigpipe [0], &revents, 1);
		591	#endif
246	gotsig = 0;	592	gotsig = 0;
247	read (sigpipe [0], &revents, 1);
248		593
249	for (sig = signalmax; sig--; )	594	for (signum = signalmax; signum--; )
250	if (signals [sig].gotsig)	595	if (signals [signum].gotsig)
251	{	596	sigevent (EV_A_ signum + 1);
252	signals [sig].gotsig = 0;
253
254	for (w = signals [sig].head; w; w = w->next)
255	event ((struct ev_watcher *)w, EV_SIGNAL);
256	}
257	}	597	}
258		598
259	static void	599	static void
260	siginit (void)	600	siginit (EV_P)
261	{	601	{
		602	#ifndef WIN32
262	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	603	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
263	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	604	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
264		605
265	/* rather than sort out wether we really need nb, set it */	606	/* rather than sort out wether we really need nb, set it */
266	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	607	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
267	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	608	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		609	#endif
268		610
269	evio_set (&sigev, sigpipe [0], EV_READ);	611	ev_io_set (&sigev, sigpipe [0], EV_READ);
270	evio_start (&sigev);	612	ev_io_start (EV_A_ &sigev);
		613	ev_unref (EV_A); /* child watcher should not keep loop alive */
271	}	614	}
272		615
273	/*****************************************************************************/	616	/*****************************************************************************/
274		617
275	static struct ev_idle **idles;	618	static struct ev_child *childs [PID_HASHSIZE];
276	static int idlemax, idlecnt;
277		619
278	static struct ev_check **checks;	620	#ifndef WIN32
279	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
280		659
281	/*****************************************************************************/	660	/*****************************************************************************/
282		661
		662	#if EV_USE_KQUEUE
		663	# include "ev_kqueue.c"
		664	#endif
283	#if HAVE_EPOLL	665	#if EV_USE_EPOLL
284	# include "ev_epoll.c"	666	# include "ev_epoll.c"
285	#endif	667	#endif
		668	#if EV_USE_POLL
		669	# include "ev_poll.c"
		670	#endif
286	#if HAVE_SELECT	671	#if EV_USE_SELECT
287	# include "ev_select.c"	672	# include "ev_select.c"
288	#endif	673	#endif
289		674
290	int ev_init (int flags)	675	int
		676	ev_version_major (void)
291	{	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	{
292	#if HAVE_MONOTONIC	710	#if EV_USE_MONOTONIC
293	{	711	{
294	struct timespec ts;	712	struct timespec ts;
295	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	713	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
296	have_monotonic = 1;	714	have_monotonic = 1;
297	}	715	}
298	#endif	716	#endif
299		717
300	ev_now = ev_time ();	718	rt_now = ev_time ();
301	now = get_clock ();	719	mn_now = get_clock ();
302	diff = ev_now - now;	720	now_floor = mn_now;
		721	rtmn_diff = rt_now - mn_now;
303		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])
304	if (pipe (sigpipe))	858	if (pipe (sigpipe))
305	return 0;	859	return 0;
306		860
307	ev_method = EVMETHOD_NONE;	861	if (!default_loop)
308	#if HAVE_EPOLL	862	{
309	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;
310	#endif	867	#endif
311	#if HAVE_SELECT
312	if (ev_method == EVMETHOD_NONE) select_init (flags);
313	#endif
314		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
315	if (ev_method)	917	if (method)
316	{	918	postfork = 1;
317	evw_init (&sigev, sigcb, 0);
318	siginit ();
319	}
320
321	return ev_method;
322	}	919	}
323		920
324	/*****************************************************************************/	921	/*****************************************************************************/
325		922
326	void ev_prefork (void)
327	{
328	}
329
330	void ev_postfork_parent (void)
331	{
332	}
333
334	void ev_postfork_child (void)
335	{
336	#if HAVE_EPOLL
337	if (ev_method == EVMETHOD_EPOLL)
338	epoll_postfork_child ();
339	#endif
340
341	evio_stop (&sigev);
342	close (sigpipe [0]);
343	close (sigpipe [1]);
344	pipe (sigpipe);
345	siginit ();
346	}
347
348	/*****************************************************************************/
349
350	static void	923	static int
351	fd_reify (void)	924	any_pending (EV_P)
352	{	925	{
353	int i;	926	int pri;
354		927
355	for (i = 0; i < fdchangecnt; ++i)	928	for (pri = NUMPRI; pri--; )
356	{	929	if (pendingcnt [pri])
357	int fd = fdchanges [i];	930	return 1;
358	ANFD *anfd = anfds + fd;
359	struct ev_io *w;
360		931
361	int wev = 0;	932	return 0;
362
363	for (w = anfd->head; w; w = w->next)
364	wev \|= w->events;
365
366	if (anfd->wev != wev)
367	{
368	method_modify (fd, anfd->wev, wev);
369	anfd->wev = wev;
370	}
371	}
372
373	fdchangecnt = 0;
374	}	933	}
375		934
376	static void	935	static void
377	call_pending ()	936	call_pending (EV_P)
378	{	937	{
379	int i;	938	int pri;
380		939
381	for (i = 0; i < pendingcnt; ++i)	940	for (pri = NUMPRI; pri--; )
		941	while (pendingcnt [pri])
382	{	942	{
383	ANPENDING *p = pendings + i;	943	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
384		944
385	if (p->w)	945	if (p->w)
386	{	946	{
387	p->w->pending = 0;	947	p->w->pending = 0;
388	p->w->cb (p->w, p->events);	948	p->w->cb (EV_A_ p->w, p->events);
389	}	949	}
390	}	950	}
391
392	pendingcnt = 0;
393	}	951	}
394		952
395	static void	953	static void
396	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	954	timers_reify (EV_P)
397	{	955	{
398	while (timercnt && timers [0]->at <= now)	956	while (timercnt && ((WT)timers [0])->at <= mn_now)
399	{	957	{
400	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)));
401		961
402	/* first reschedule or stop timer */	962	/* first reschedule or stop timer */
403	if (w->repeat)	963	if (w->repeat)
404	{	964	{
405	if (w->is_abs)	965	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
406	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
407	else
408	w->at = now + w->repeat;	966	((WT)w)->at = mn_now + w->repeat;
409
410	assert (w->at > now);
411
412	downheap (timers, timercnt, 0);	967	downheap ((WT *)timers, timercnt, 0);
413	}	968	}
414	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)
415	{	987	{
416	evtimer_stop (w); /* nonrepeating: stop timer */	988	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001);
417	--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);
418	}	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 */
419		1001
420	event ((struct ev_watcher *)w, EV_TIMEOUT);	1002	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
421	}	1003	}
422	}	1004	}
423		1005
424	static void	1006	static void
425	time_update ()	1007	periodics_reschedule (EV_P)
426	{	1008	{
427	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;
428	ev_now = ev_time ();	1040	rt_now = ev_time ();
429		1041	return 1;
430	if (have_monotonic)
431	{	1042	}
432	ev_tstamp odiff = diff;	1043	}
433		1044
434	/* detecting time jumps is much more difficult */	1045	static void
435	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))
436	{	1054	{
437	now = get_clock ();	1055	ev_tstamp odiff = rtmn_diff;
		1056
		1057	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1058	{
438	diff = ev_now - now;	1059	rtmn_diff = rt_now - mn_now;
439		1060
440	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1061	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
441	return; /* all is well */	1062	return; /* all is well */
442		1063
443	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) */
444	}	1072	}
		1073	}
		1074	else
		1075	#endif
		1076	{
		1077	rt_now = ev_time ();
445		1078
446	/* time jump detected, reschedule atimers */	1079	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
447	for (i = 0; i < atimercnt; ++i)
448	{	1080	{
449	struct ev_timer *w = atimers [i];	1081	periodics_reschedule (EV_A);
450	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;
451	}	1086	}
452	}
453	else
454	{
455	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
456	/* time jump detected, adjust rtimers */
457	for (i = 0; i < rtimercnt; ++i)
458	rtimers [i]->at += ev_now - now;
459		1087
460	now = ev_now;	1088	mn_now = rt_now;
461	}	1089	}
462	}	1090	}
463		1091
464	int ev_loop_done;	1092	void
		1093	ev_ref (EV_P)
		1094	{
		1095	++activecnt;
		1096	}
465		1097
		1098	void
		1099	ev_unref (EV_P)
		1100	{
		1101	--activecnt;
		1102	}
		1103
		1104	static int loop_done;
		1105
		1106	void
466	void ev_loop (int flags)	1107	ev_loop (EV_P_ int flags)
467	{	1108	{
468	double block;	1109	double block;
469	ev_loop_done = flags & EVLOOP_ONESHOT;	1110	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
470
471	if (checkcnt)
472	{
473	queue_events (checks, checkcnt, EV_CHECK);
474	call_pending ();
475	}
476		1111
477	do	1112	do
478	{	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
479	/* update fd-related kernel structures */	1125	/* update fd-related kernel structures */
480	fd_reify ();	1126	fd_reify (EV_A);
481		1127
482	/* 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
483	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1142	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
484	block = 0.;	1143	block = 0.;
485	else	1144	else
486	{	1145	{
487	block = MAX_BLOCKTIME;	1146	block = MAX_BLOCKTIME;
488		1147
489	if (rtimercnt)	1148	if (timercnt)
490	{	1149	{
491	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1150	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
492	if (block > to) block = to;	1151	if (block > to) block = to;
493	}	1152	}
494		1153
495	if (atimercnt)	1154	if (periodiccnt)
496	{	1155	{
497	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1156	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
498	if (block > to) block = to;	1157	if (block > to) block = to;
499	}	1158	}
500		1159
501	if (block < 0.) block = 0.;	1160	if (block < 0.) block = 0.;
502	}	1161	}
503		1162
504	method_poll (block);	1163	method_poll (EV_A_ block);
505		1164
506	/* update ev_now, do magic */	1165	/* update rt_now, do magic */
507	time_update ();	1166	time_update (EV_A);
508		1167
509	/* queue pending timers and reschedule them */	1168	/* queue pending timers and reschedule them */
510	/* absolute timers first */	1169	timers_reify (EV_A); /* relative timers called last */
511	timers_reify (atimers, atimercnt, ev_now);	1170	periodics_reify (EV_A); /* absolute timers called first */
512	/* relative timers second */
513	timers_reify (rtimers, rtimercnt, now);
514		1171
515	/* queue idle watchers unless io or timers are pending */	1172	/* queue idle watchers unless io or timers are pending */
516	if (!pendingcnt)	1173	if (idlecnt && !any_pending (EV_A))
517	queue_events (idles, idlecnt, EV_IDLE);	1174	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
518		1175
519	/* queue check and possibly idle watchers */	1176	/* queue check watchers, to be executed first */
		1177	if (checkcnt)
520	queue_events (checks, checkcnt, EV_CHECK);	1178	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
521		1179
522	call_pending ();	1180	call_pending (EV_A);
523	}	1181	}
524	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;
525	}	1192	}
526		1193
527	/*****************************************************************************/	1194	/*****************************************************************************/
528		1195
529	static void	1196	inline void
530	wlist_add (struct ev_watcher_list *head, struct ev_watcher_list elem)	1197	wlist_add (WL *head, WL elem)
531	{	1198	{
532	elem->next = *head;	1199	elem->next = *head;
533	*head = elem;	1200	*head = elem;
534	}	1201	}
535		1202
536	static void	1203	inline void
537	wlist_del (struct ev_watcher_list *head, struct ev_watcher_list elem)	1204	wlist_del (WL *head, WL elem)
538	{	1205	{
539	while (*head)	1206	while (*head)
540	{	1207	{
541	if (*head == elem)	1208	if (*head == elem)
542	{	1209	{
546		1213
547	head = &(*head)->next;	1214	head = &(*head)->next;
548	}	1215	}
549	}	1216	}
550		1217
551	static void	1218	inline void
552	ev_start (struct ev_watcher *w, int active)	1219	ev_clear_pending (EV_P_ W w)
553	{	1220	{
		1221	if (w->pending)
		1222	{
		1223	pendings [ABSPRI (w)][w->pending - 1].w = 0;
554	w->pending = 0;	1224	w->pending = 0;
		1225	}
		1226	}
		1227
		1228	inline void
		1229	ev_start (EV_P_ W w, int active)
		1230	{
		1231	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1232	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1233
555	w->active = active;	1234	w->active = active;
		1235	ev_ref (EV_A);
556	}	1236	}
557		1237
558	static void	1238	inline void
559	ev_stop (struct ev_watcher *w)	1239	ev_stop (EV_P_ W w)
560	{	1240	{
561	if (w->pending)	1241	ev_unref (EV_A);
562	pendings [w->pending - 1].w = 0;
563
564	w->active = 0;	1242	w->active = 0;
565	/* nop */
566	}	1243	}
567		1244
568	/*****************************************************************************/	1245	/*****************************************************************************/
569		1246
570	void	1247	void
571	evio_start (struct ev_io *w)	1248	ev_io_start (EV_P_ struct ev_io *w)
572	{	1249	{
		1250	int fd = w->fd;
		1251
573	if (ev_is_active (w))	1252	if (ev_is_active (w))
574	return;	1253	return;
575		1254
576	int fd = w->fd;	1255	assert (("ev_io_start called with negative fd", fd >= 0));
577		1256
578	ev_start ((struct ev_watcher *)w, 1);	1257	ev_start (EV_A_ (W)w, 1);
579	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1258	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
580	wlist_add ((struct ev_watcher_list *)&anfds[fd].head, (struct ev_watcher_list )w);	1259	wlist_add ((WL *)&anfds[fd].head, (WL)w);
581		1260
582	++fdchangecnt;	1261	fd_change (EV_A_ fd);
583	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
584	fdchanges [fdchangecnt - 1] = fd;
585	}	1262	}
586		1263
587	void	1264	void
588	evio_stop (struct ev_io *w)	1265	ev_io_stop (EV_P_ struct ev_io *w)
589	{	1266	{
		1267	ev_clear_pending (EV_A_ (W)w);
590	if (!ev_is_active (w))	1268	if (!ev_is_active (w))
591	return;	1269	return;
592		1270
593	wlist_del ((struct ev_watcher_list *)&anfds[w->fd].head, (struct ev_watcher_list )w);	1271	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
594	ev_stop ((struct ev_watcher *)w);	1272	ev_stop (EV_A_ (W)w);
595		1273
596	++fdchangecnt;	1274	fd_change (EV_A_ w->fd);
597	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
598	fdchanges [fdchangecnt - 1] = w->fd;
599	}	1275	}
600		1276
601	void	1277	void
602	evtimer_start (struct ev_timer *w)	1278	ev_timer_start (EV_P_ struct ev_timer *w)
603	{	1279	{
604	if (ev_is_active (w))	1280	if (ev_is_active (w))
605	return;	1281	return;
606		1282
607	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);
608	{	1308	}
609	/* 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	{
610	if (w->repeat)	1320	if (w->repeat)
611	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1321	{
612		1322	((WT)w)->at = mn_now + w->repeat;
613	ev_start ((struct ev_watcher *)w, ++atimercnt);	1323	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
614	array_needsize (atimers, atimermax, atimercnt, );	1324	}
615	atimers [atimercnt - 1] = w;
616	upheap (atimers, atimercnt - 1);
617	}
618	else	1325	else
		1326	ev_timer_stop (EV_A_ w);
619	{	1327	}
620	w->at += now;	1328	else if (w->repeat)
		1329	ev_timer_start (EV_A_ w);
		1330	}
621		1331
622	ev_start ((struct ev_watcher *)w, ++rtimercnt);	1332	void
623	array_needsize (rtimers, rtimermax, rtimercnt, );	1333	ev_periodic_start (EV_P_ struct ev_periodic *w)
624	rtimers [rtimercnt - 1] = w;	1334	{
625	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)
626	}	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	}
627		1346
628	}	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);
629		1351
		1352	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1353	}
		1354
630	void	1355	void
631	evtimer_stop (struct ev_timer *w)	1356	ev_periodic_stop (EV_P_ struct ev_periodic *w)
632	{	1357	{
		1358	ev_clear_pending (EV_A_ (W)w);
633	if (!ev_is_active (w))	1359	if (!ev_is_active (w))
634	return;	1360	return;
635		1361
636	if (w->is_abs)	1362	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
637	{	1363
638	if (w->active < atimercnt--)	1364	if (((W)w)->active < periodiccnt--)
639	{
640	atimers [w->active - 1] = atimers [atimercnt];
641	downheap (atimers, atimercnt, w->active - 1);
642	}
643	}	1365	{
644	else	1366	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1367	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
645	{	1368	}
646	if (w->active < rtimercnt--)
647	{
648	rtimers [w->active - 1] = rtimers [rtimercnt];
649	downheap (rtimers, rtimercnt, w->active - 1);
650	}
651	}
652		1369
653	ev_stop ((struct ev_watcher *)w);	1370	ev_stop (EV_A_ (W)w);
654	}	1371	}
655		1372
656	void	1373	void
657	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)
658	{	1382	{
659	if (ev_is_active (w))	1383	if (ev_is_active (w))
660	return;	1384	return;
661		1385
662	ev_start ((struct ev_watcher *)w, 1);	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
		1461	ev_start (EV_A_ (W)w, 1);
663	array_needsize (signals, signalmax, w->signum, signals_init);	1462	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
664	wlist_add ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	1463	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
665		1464
666	if (!w->next)	1465	if (!((WL)w)->next)
667	{	1466	{
		1467	#if WIN32
		1468	signal (w->signum, sighandler);
		1469	#else
668	struct sigaction sa;	1470	struct sigaction sa;
669	sa.sa_handler = sighandler;	1471	sa.sa_handler = sighandler;
670	sigfillset (&sa.sa_mask);	1472	sigfillset (&sa.sa_mask);
671	sa.sa_flags = 0;	1473	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
672	sigaction (w->signum, &sa, 0);	1474	sigaction (w->signum, &sa, 0);
		1475	#endif
673	}	1476	}
674	}	1477	}
675		1478
676	void	1479	void
677	evsignal_stop (struct ev_signal *w)	1480	ev_signal_stop (EV_P_ struct ev_signal *w)
678	{	1481	{
		1482	ev_clear_pending (EV_A_ (W)w);
679	if (!ev_is_active (w))	1483	if (!ev_is_active (w))
680	return;	1484	return;
681		1485
682	wlist_del ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	1486	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
683	ev_stop ((struct ev_watcher *)w);	1487	ev_stop (EV_A_ (W)w);
684		1488
685	if (!signals [w->signum - 1].head)	1489	if (!signals [w->signum - 1].head)
686	signal (w->signum, SIG_DFL);	1490	signal (w->signum, SIG_DFL);
687	}	1491	}
688		1492
689	void evidle_start (struct ev_idle *w)	1493	void
		1494	ev_child_start (EV_P_ struct ev_child *w)
690	{	1495	{
		1496	#if EV_MULTIPLICITY
		1497	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1498	#endif
691	if (ev_is_active (w))	1499	if (ev_is_active (w))
692	return;	1500	return;
693		1501
694	ev_start ((struct ev_watcher *)w, ++idlecnt);	1502	ev_start (EV_A_ (W)w, 1);
695	array_needsize (idles, idlemax, idlecnt, );	1503	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
696	idles [idlecnt - 1] = w;
697	}	1504	}
698		1505
699	void evidle_stop (struct ev_idle *w)	1506	void
		1507	ev_child_stop (EV_P_ struct ev_child *w)
700	{	1508	{
701	idles [w->active - 1] = idles [--idlecnt];	1509	ev_clear_pending (EV_A_ (W)w);
702	ev_stop ((struct ev_watcher *)w);
703	}
704
705	void evcheck_start (struct ev_check *w)
706	{
707	if (ev_is_active (w))	1510	if (ev_is_active (w))
708	return;	1511	return;
709		1512
710	ev_start ((struct ev_watcher *)w, ++checkcnt);	1513	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
711	array_needsize (checks, checkmax, checkcnt, );	1514	ev_stop (EV_A_ (W)w);
712	checks [checkcnt - 1] = w;
713	}
714
715	void evcheck_stop (struct ev_check *w)
716	{
717	checks [w->active - 1] = checks [--checkcnt];
718	ev_stop ((struct ev_watcher *)w);
719	}	1515	}
720		1516
721	/*****************************************************************************/	1517	/*****************************************************************************/
722	#if 1
723		1518
724	static void	1519	struct ev_once
725	sin_cb (struct ev_io *w, int revents)
726	{	1520	{
727	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
728	}
729
730	static void
731	ocb (struct ev_timer *w, int revents)
732	{
733	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
734	evtimer_stop (w);
735	evtimer_start (w);
736	}
737
738	static void
739	scb (struct ev_signal *w, int revents)
740	{
741	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
742	}
743
744	static void
745	gcb (struct ev_signal *w, int revents)
746	{
747	fprintf (stderr, "generic %x\n", revents);
748	}
749
750	int main (void)
751	{
752	struct ev_io sin;	1521	struct ev_io io;
753
754	ev_init (0);
755
756	evw_init (&sin, sin_cb, 55);
757	evio_set (&sin, 0, EV_READ);
758	evio_start (&sin);
759
760	struct ev_timer t[10000];
761
762	#if 0
763	int i;
764	for (i = 0; i < 10000; ++i)
765	{
766	struct ev_timer *w = t + i;
767	evw_init (w, ocb, i);
768	evtimer_set_abs (w, drand48 (), 0.99775533);
769	evtimer_start (w);
770	if (drand48 () < 0.5)
771	evtimer_stop (w);
772	}
773	#endif
774
775	struct ev_timer t1;	1522	struct ev_timer to;
776	evw_init (&t1, ocb, 0);	1523	void (cb)(int revents, void arg);
777	evtimer_set_abs (&t1, 5, 10);	1524	void *arg;
778	evtimer_start (&t1);	1525	};
779		1526
780	struct ev_signal sig;	1527	static void
781	evw_init (&sig, scb, 65535);	1528	once_cb (EV_P_ struct ev_once *once, int revents)
782	evsignal_set (&sig, SIGQUIT);	1529	{
783	evsignal_start (&sig);	1530	void (cb)(int revents, void arg) = once->cb;
		1531	void *arg = once->arg;
784		1532
785	struct ev_check cw;	1533	ev_io_stop (EV_A_ &once->io);
786	evw_init (&cw, gcb, 0);	1534	ev_timer_stop (EV_A_ &once->to);
787	evcheck_start (&cw);	1535	ev_free (once);
788		1536
789	struct ev_idle iw;	1537	cb (revents, arg);
790	evw_init (&iw, gcb, 0);
791	evidle_start (&iw);
792
793	ev_loop (0);
794
795	return 0;
796	}	1538	}
797		1539
798	#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	}
799		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	}
800		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));
801		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;
802		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 1.9 by root, Wed Oct 31 07:24:17 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 1.9 by root, Wed Oct 31 07:24:17 2007 UTC vs.
Revision 1.79 by root, Fri Nov 9 15:15:20 2007 UTC