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

Comparing libev/ev.c (file contents):
Revision 1.14 by root, Wed Oct 31 11:52:12 2007 UTC vs.
Revision 1.80 by root, Fri Nov 9 15:30:59 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
14	#define HAVE_EPOLL 1	69	#include <signal.h>
15		70
		71	#ifndef WIN32
		72	# include <unistd.h>
		73	# include <sys/time.h>
		74	# include <sys/wait.h>
		75	#endif
		76	/**/
		77
16	#ifndef HAVE_MONOTONIC	78	#ifndef EV_USE_MONOTONIC
17	# ifdef CLOCK_MONOTONIC
18	# 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
19	# endif	105	# endif
20	#endif	106	#endif
21		107
22	#ifndef HAVE_SELECT
23	# define HAVE_SELECT 1
24	#endif
25
26	#ifndef HAVE_EPOLL
27	# define HAVE_EPOLL 0
28	#endif
29
30	#ifndef HAVE_REALTIME	108	#ifndef EV_USE_REALTIME
31	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	109	# define EV_USE_REALTIME 1
32	#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	/**/
33		125
34	#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) */
35	#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 */
36		130
37	#include "ev.h"	131	#include "ev.h"
		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)
38		146
39	typedef struct ev_watcher *W;	147	typedef struct ev_watcher *W;
40	typedef struct ev_watcher_list *WL;	148	typedef struct ev_watcher_list *WL;
41	typedef struct ev_watcher_time *WT;	149	typedef struct ev_watcher_time *WT;
42		150
43	static ev_tstamp now, diff; /* monotonic clock */	151	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
44	ev_tstamp ev_now;
45	int ev_method;
46		152
47	static int have_monotonic; /* runtime */	153	#include "ev_win32.c"
48
49	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
50	static void (*method_modify)(int fd, int oev, int nev);
51	static void (*method_poll)(ev_tstamp timeout);
52		154
53	/*****************************************************************************/	155	/*****************************************************************************/
54		156
55	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	#undef VAR
		225	};
		226	#include "ev_wrap.h"
		227
		228	struct ev_loop default_loop_struct;
		229	static struct ev_loop *default_loop;
		230
		231	#else
		232
		233	#define VAR(name,decl) static decl;
		234	#include "ev_vars.h"
		235	#undef VAR
		236
		237	static int default_loop;
		238
		239	#endif
		240
		241	/*****************************************************************************/
		242
		243	inline ev_tstamp
56	ev_time (void)	244	ev_time (void)
57	{	245	{
58	#if HAVE_REALTIME	246	#if EV_USE_REALTIME
59	struct timespec ts;	247	struct timespec ts;
60	clock_gettime (CLOCK_REALTIME, &ts);	248	clock_gettime (CLOCK_REALTIME, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	249	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	#else	250	#else
63	struct timeval tv;	251	struct timeval tv;
64	gettimeofday (&tv, 0);	252	gettimeofday (&tv, 0);
65	return tv.tv_sec + tv.tv_usec * 1e-6;	253	return tv.tv_sec + tv.tv_usec * 1e-6;
66	#endif	254	#endif
67	}	255	}
68		256
69	static ev_tstamp	257	inline ev_tstamp
70	get_clock (void)	258	get_clock (void)
71	{	259	{
72	#if HAVE_MONOTONIC	260	#if EV_USE_MONOTONIC
73	if (have_monotonic)	261	if (expect_true (have_monotonic))
74	{	262	{
75	struct timespec ts;	263	struct timespec ts;
76	clock_gettime (CLOCK_MONOTONIC, &ts);	264	clock_gettime (CLOCK_MONOTONIC, &ts);
77	return ts.tv_sec + ts.tv_nsec * 1e-9;	265	return ts.tv_sec + ts.tv_nsec * 1e-9;
78	}	266	}
79	#endif	267	#endif
80		268
81	return ev_time ();	269	return ev_time ();
82	}	270	}
83		271
		272	ev_tstamp
		273	ev_now (EV_P)
		274	{
		275	return rt_now;
		276	}
		277
		278	#define array_roundsize(type,n) ((n) \| 4 & ~3)
		279
84	#define array_needsize(base,cur,cnt,init) \	280	#define array_needsize(type,base,cur,cnt,init) \
85	if ((cnt) > cur) \	281	if (expect_false ((cnt) > cur)) \
86	{ \	282	{ \
87	int newcnt = cur ? cur << 1 : 16; \	283	int newcnt = cur; \
88	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	284	do \
		285	{ \
		286	newcnt = array_roundsize (type, newcnt << 1); \
		287	} \
		288	while ((cnt) > newcnt); \
		289	\
89	base = realloc (base, sizeof (base) (newcnt)); \	290	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
90	init (base + cur, newcnt - cur); \	291	init (base + cur, newcnt - cur); \
91	cur = newcnt; \	292	cur = newcnt; \
92	}	293	}
		294
		295	#define array_slim(type,stem) \
		296	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		297	{ \
		298	stem ## max = array_roundsize (stem ## cnt >> 1); \
		299	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
		300	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		301	}
		302
		303	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		304	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		305	#define array_free_microshit(stem) \
		306	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		307
		308	#define array_free(stem, idx) \
		309	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
93		310
94	/*****************************************************************************/	311	/*****************************************************************************/
95		312
96	typedef struct
97	{
98	struct ev_io *head;
99	unsigned char wev, rev; /* want, received event set */
100	} ANFD;
101
102	static ANFD *anfds;
103	static int anfdmax;
104
105	static int *fdchanges;
106	static int fdchangemax, fdchangecnt;
107
108	static void	313	static void
109	anfds_init (ANFD *base, int count)	314	anfds_init (ANFD *base, int count)
110	{	315	{
111	while (count--)	316	while (count--)
112	{	317	{
113	base->head = 0;	318	base->head = 0;
114	base->wev = base->rev = EV_NONE;	319	base->events = EV_NONE;
		320	base->reify = 0;
		321
115	++base;	322	++base;
116	}	323	}
117	}	324	}
118		325
119	typedef struct	326	void
		327	ev_feed_event (EV_P_ void *w, int revents)
120	{	328	{
121	W w;	329	W w_ = (W)w;
122	int events;
123	} ANPENDING;
124		330
125	static ANPENDING *pendings;	331	if (w_->pending)
126	static int pendingmax, pendingcnt;	332	{
		333	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		334	return;
		335	}
127		336
128	static void
129	event (W w, int events)
130	{
131	w->pending = ++pendingcnt;	337	w_->pending = ++pendingcnt [ABSPRI (w_)];
132	array_needsize (pendings, pendingmax, pendingcnt, );	338	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
133	pendings [pendingcnt - 1].w = w;	339	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
134	pendings [pendingcnt - 1].events = events;	340	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
135	}	341	}
136		342
137	static void	343	static void
		344	queue_events (EV_P_ W *events, int eventcnt, int type)
		345	{
		346	int i;
		347
		348	for (i = 0; i < eventcnt; ++i)
		349	ev_feed_event (EV_A_ events [i], type);
		350	}
		351
		352	inline void
138	fd_event (int fd, int events)	353	fd_event (EV_P_ int fd, int revents)
139	{	354	{
140	ANFD *anfd = anfds + fd;	355	ANFD *anfd = anfds + fd;
141	struct ev_io *w;	356	struct ev_io *w;
142		357
143	for (w = anfd->head; w; w = w->next)	358	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
144	{	359	{
145	int ev = w->events & events;	360	int ev = w->events & revents;
146		361
147	if (ev)	362	if (ev)
148	event ((W)w, ev);	363	ev_feed_event (EV_A_ (W)w, ev);
149	}	364	}
150	}	365	}
151		366
		367	void
		368	ev_feed_fd_event (EV_P_ int fd, int revents)
		369	{
		370	fd_event (EV_A_ fd, revents);
		371	}
		372
		373	/*****************************************************************************/
		374
152	static void	375	static void
153	queue_events (W *events, int eventcnt, int type)	376	fd_reify (EV_P)
154	{	377	{
155	int i;	378	int i;
156		379
157	for (i = 0; i < eventcnt; ++i)	380	for (i = 0; i < fdchangecnt; ++i)
158	event (events [i], type);	381	{
		382	int fd = fdchanges [i];
		383	ANFD *anfd = anfds + fd;
		384	struct ev_io *w;
		385
		386	int events = 0;
		387
		388	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		389	events \|= w->events;
		390
		391	anfd->reify = 0;
		392
		393	method_modify (EV_A_ fd, anfd->events, events);
		394	anfd->events = events;
		395	}
		396
		397	fdchangecnt = 0;
		398	}
		399
		400	static void
		401	fd_change (EV_P_ int fd)
		402	{
		403	if (anfds [fd].reify)
		404	return;
		405
		406	anfds [fd].reify = 1;
		407
		408	++fdchangecnt;
		409	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		410	fdchanges [fdchangecnt - 1] = fd;
		411	}
		412
		413	static void
		414	fd_kill (EV_P_ int fd)
		415	{
		416	struct ev_io *w;
		417
		418	while ((w = (struct ev_io *)anfds [fd].head))
		419	{
		420	ev_io_stop (EV_A_ w);
		421	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		422	}
		423	}
		424
		425	static int
		426	fd_valid (int fd)
		427	{
		428	#ifdef WIN32
		429	return !!win32_get_osfhandle (fd);
		430	#else
		431	return fcntl (fd, F_GETFD) != -1;
		432	#endif
		433	}
		434
		435	/* called on EBADF to verify fds */
		436	static void
		437	fd_ebadf (EV_P)
		438	{
		439	int fd;
		440
		441	for (fd = 0; fd < anfdmax; ++fd)
		442	if (anfds [fd].events)
		443	if (!fd_valid (fd) == -1 && errno == EBADF)
		444	fd_kill (EV_A_ fd);
		445	}
		446
		447	/* called on ENOMEM in select/poll to kill some fds and retry */
		448	static void
		449	fd_enomem (EV_P)
		450	{
		451	int fd;
		452
		453	for (fd = anfdmax; fd--; )
		454	if (anfds [fd].events)
		455	{
		456	fd_kill (EV_A_ fd);
		457	return;
		458	}
		459	}
		460
		461	/* usually called after fork if method needs to re-arm all fds from scratch */
		462	static void
		463	fd_rearm_all (EV_P)
		464	{
		465	int fd;
		466
		467	/* this should be highly optimised to not do anything but set a flag */
		468	for (fd = 0; fd < anfdmax; ++fd)
		469	if (anfds [fd].events)
		470	{
		471	anfds [fd].events = 0;
		472	fd_change (EV_A_ fd);
		473	}
159	}	474	}
160		475
161	/*****************************************************************************/	476	/*****************************************************************************/
162		477
163	static struct ev_timer **timers;
164	static int timermax, timercnt;
165
166	static struct ev_periodic **periodics;
167	static int periodicmax, periodiccnt;
168
169	static void	478	static void
170	upheap (WT *timers, int k)	479	upheap (WT *heap, int k)
171	{	480	{
172	WT w = timers [k];	481	WT w = heap [k];
173		482
174	while (k && timers [k >> 1]->at > w->at)	483	while (k && heap [k >> 1]->at > w->at)
175	{	484	{
176	timers [k] = timers [k >> 1];	485	heap [k] = heap [k >> 1];
177	timers [k]->active = k + 1;	486	((W)heap [k])->active = k + 1;
178	k >>= 1;	487	k >>= 1;
179	}	488	}
180		489
181	timers [k] = w;	490	heap [k] = w;
182	timers [k]->active = k + 1;	491	((W)heap [k])->active = k + 1;
183		492
184	}	493	}
185		494
186	static void	495	static void
187	downheap (WT *timers, int N, int k)	496	downheap (WT *heap, int N, int k)
188	{	497	{
189	WT w = timers [k];	498	WT w = heap [k];
190		499
191	while (k < (N >> 1))	500	while (k < (N >> 1))
192	{	501	{
193	int j = k << 1;	502	int j = k << 1;
194		503
195	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	504	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
196	++j;	505	++j;
197		506
198	if (w->at <= timers [j]->at)	507	if (w->at <= heap [j]->at)
199	break;	508	break;
200		509
201	timers [k] = timers [j];	510	heap [k] = heap [j];
202	timers [k]->active = k + 1;	511	((W)heap [k])->active = k + 1;
203	k = j;	512	k = j;
204	}	513	}
205		514
206	timers [k] = w;	515	heap [k] = w;
207	timers [k]->active = k + 1;	516	((W)heap [k])->active = k + 1;
208	}	517	}
209		518
210	/*****************************************************************************/	519	/*****************************************************************************/
211		520
212	typedef struct	521	typedef struct
213	{	522	{
214	struct ev_signal *head;	523	WL head;
215	sig_atomic_t gotsig;	524	sig_atomic_t volatile gotsig;
216	} ANSIG;	525	} ANSIG;
217		526
218	static ANSIG *signals;	527	static ANSIG *signals;
219	static int signalmax;	528	static int signalmax;
220		529
221	static int sigpipe [2];	530	static int sigpipe [2];
222	static sig_atomic_t gotsig;	531	static sig_atomic_t volatile gotsig;
223	static struct ev_io sigev;	532	static struct ev_io sigev;
224		533
225	static void	534	static void
226	signals_init (ANSIG *base, int count)	535	signals_init (ANSIG *base, int count)
227	{	536	{
228	while (count--)	537	while (count--)
229	{	538	{
230	base->head = 0;	539	base->head = 0;
231	base->gotsig = 0;	540	base->gotsig = 0;
		541
232	++base;	542	++base;
233	}	543	}
234	}	544	}
235		545
236	static void	546	static void
237	sighandler (int signum)	547	sighandler (int signum)
238	{	548	{
		549	#if WIN32
		550	signal (signum, sighandler);
		551	#endif
		552
239	signals [signum - 1].gotsig = 1;	553	signals [signum - 1].gotsig = 1;
240		554
241	if (!gotsig)	555	if (!gotsig)
242	{	556	{
		557	int old_errno = errno;
243	gotsig = 1;	558	gotsig = 1;
		559	#ifdef WIN32
		560	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		561	#else
244	write (sigpipe [1], &gotsig, 1);	562	write (sigpipe [1], &signum, 1);
		563	#endif
		564	errno = old_errno;
245	}	565	}
246	}	566	}
247		567
		568	void
		569	ev_feed_signal_event (EV_P_ int signum)
		570	{
		571	WL w;
		572
		573	#if EV_MULTIPLICITY
		574	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		575	#endif
		576
		577	--signum;
		578
		579	if (signum < 0 \|\| signum >= signalmax)
		580	return;
		581
		582	signals [signum].gotsig = 0;
		583
		584	for (w = signals [signum].head; w; w = w->next)
		585	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		586	}
		587
248	static void	588	static void
249	sigcb (struct ev_io *iow, int revents)	589	sigcb (EV_P_ struct ev_io *iow, int revents)
250	{	590	{
251	struct ev_signal *w;
252	int sig;	591	int signum;
253		592
		593	#ifdef WIN32
		594	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		595	#else
		596	read (sigpipe [0], &revents, 1);
		597	#endif
254	gotsig = 0;	598	gotsig = 0;
255	read (sigpipe [0], &revents, 1);
256		599
257	for (sig = signalmax; sig--; )	600	for (signum = signalmax; signum--; )
258	if (signals [sig].gotsig)	601	if (signals [signum].gotsig)
259	{	602	ev_feed_signal_event (EV_A_ signum + 1);
260	signals [sig].gotsig = 0;
261
262	for (w = signals [sig].head; w; w = w->next)
263	event ((W)w, EV_SIGNAL);
264	}
265	}	603	}
266		604
267	static void	605	static void
268	siginit (void)	606	siginit (EV_P)
269	{	607	{
		608	#ifndef WIN32
270	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	609	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
271	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	610	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
272		611
273	/* rather than sort out wether we really need nb, set it */	612	/* rather than sort out wether we really need nb, set it */
274	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	613	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
275	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	614	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		615	#endif
276		616
277	evio_set (&sigev, sigpipe [0], EV_READ);	617	ev_io_set (&sigev, sigpipe [0], EV_READ);
278	evio_start (&sigev);	618	ev_io_start (EV_A_ &sigev);
		619	ev_unref (EV_A); /* child watcher should not keep loop alive */
279	}	620	}
280		621
281	/*****************************************************************************/	622	/*****************************************************************************/
282		623
283	static struct ev_idle **idles;	624	static struct ev_child *childs [PID_HASHSIZE];
284	static int idlemax, idlecnt;
285		625
286	static struct ev_check **checks;	626	#ifndef WIN32
287	static int checkmax, checkcnt;	627
		628	static struct ev_signal childev;
		629
		630	#ifndef WCONTINUED
		631	# define WCONTINUED 0
		632	#endif
		633
		634	static void
		635	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		636	{
		637	struct ev_child *w;
		638
		639	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		640	if (w->pid == pid \|\| !w->pid)
		641	{
		642	ev_priority (w) = ev_priority (sw); /* need to do it now */
		643	w->rpid = pid;
		644	w->rstatus = status;
		645	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		646	}
		647	}
		648
		649	static void
		650	childcb (EV_P_ struct ev_signal *sw, int revents)
		651	{
		652	int pid, status;
		653
		654	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		655	{
		656	/* make sure we are called again until all childs have been reaped */
		657	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		658
		659	child_reap (EV_A_ sw, pid, pid, status);
		660	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		661	}
		662	}
		663
		664	#endif
288		665
289	/*****************************************************************************/	666	/*****************************************************************************/
290		667
		668	#if EV_USE_KQUEUE
		669	# include "ev_kqueue.c"
		670	#endif
291	#if HAVE_EPOLL	671	#if EV_USE_EPOLL
292	# include "ev_epoll.c"	672	# include "ev_epoll.c"
293	#endif	673	#endif
		674	#if EV_USE_POLL
		675	# include "ev_poll.c"
		676	#endif
294	#if HAVE_SELECT	677	#if EV_USE_SELECT
295	# include "ev_select.c"	678	# include "ev_select.c"
296	#endif	679	#endif
297		680
298	int ev_init (int flags)	681	int
		682	ev_version_major (void)
299	{	683	{
		684	return EV_VERSION_MAJOR;
		685	}
		686
		687	int
		688	ev_version_minor (void)
		689	{
		690	return EV_VERSION_MINOR;
		691	}
		692
		693	/* return true if we are running with elevated privileges and should ignore env variables */
		694	static int
		695	enable_secure (void)
		696	{
		697	#ifdef WIN32
		698	return 0;
		699	#else
		700	return getuid () != geteuid ()
		701	\|\| getgid () != getegid ();
		702	#endif
		703	}
		704
		705	int
		706	ev_method (EV_P)
		707	{
		708	return method;
		709	}
		710
		711	static void
		712	loop_init (EV_P_ int methods)
		713	{
		714	if (!method)
		715	{
300	#if HAVE_MONOTONIC	716	#if EV_USE_MONOTONIC
301	{	717	{
302	struct timespec ts;	718	struct timespec ts;
303	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	719	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
304	have_monotonic = 1;	720	have_monotonic = 1;
305	}	721	}
306	#endif	722	#endif
307		723
308	ev_now = ev_time ();	724	rt_now = ev_time ();
309	now = get_clock ();	725	mn_now = get_clock ();
310	diff = ev_now - now;	726	now_floor = mn_now;
		727	rtmn_diff = rt_now - mn_now;
311		728
		729	if (methods == EVMETHOD_AUTO)
		730	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		731	methods = atoi (getenv ("LIBEV_METHODS"));
		732	else
		733	methods = EVMETHOD_ANY;
		734
		735	method = 0;
		736	#if EV_USE_WIN32
		737	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		738	#endif
		739	#if EV_USE_KQUEUE
		740	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		741	#endif
		742	#if EV_USE_EPOLL
		743	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		744	#endif
		745	#if EV_USE_POLL
		746	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		747	#endif
		748	#if EV_USE_SELECT
		749	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		750	#endif
		751
		752	ev_watcher_init (&sigev, sigcb);
		753	ev_set_priority (&sigev, EV_MAXPRI);
		754	}
		755	}
		756
		757	void
		758	loop_destroy (EV_P)
		759	{
		760	int i;
		761
		762	#if EV_USE_WIN32
		763	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		764	#endif
		765	#if EV_USE_KQUEUE
		766	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		767	#endif
		768	#if EV_USE_EPOLL
		769	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		770	#endif
		771	#if EV_USE_POLL
		772	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		773	#endif
		774	#if EV_USE_SELECT
		775	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		776	#endif
		777
		778	for (i = NUMPRI; i--; )
		779	array_free (pending, [i]);
		780
		781	/* have to use the microsoft-never-gets-it-right macro */
		782	array_free_microshit (fdchange);
		783	array_free_microshit (timer);
		784	array_free_microshit (periodic);
		785	array_free_microshit (idle);
		786	array_free_microshit (prepare);
		787	array_free_microshit (check);
		788
		789	method = 0;
		790	}
		791
		792	static void
		793	loop_fork (EV_P)
		794	{
		795	#if EV_USE_EPOLL
		796	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		797	#endif
		798	#if EV_USE_KQUEUE
		799	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		800	#endif
		801
		802	if (ev_is_active (&sigev))
		803	{
		804	/* default loop */
		805
		806	ev_ref (EV_A);
		807	ev_io_stop (EV_A_ &sigev);
		808	close (sigpipe [0]);
		809	close (sigpipe [1]);
		810
		811	while (pipe (sigpipe))
		812	syserr ("(libev) error creating pipe");
		813
		814	siginit (EV_A);
		815	}
		816
		817	postfork = 0;
		818	}
		819
		820	#if EV_MULTIPLICITY
		821	struct ev_loop *
		822	ev_loop_new (int methods)
		823	{
		824	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		825
		826	memset (loop, 0, sizeof (struct ev_loop));
		827
		828	loop_init (EV_A_ methods);
		829
		830	if (ev_method (EV_A))
		831	return loop;
		832
		833	return 0;
		834	}
		835
		836	void
		837	ev_loop_destroy (EV_P)
		838	{
		839	loop_destroy (EV_A);
		840	ev_free (loop);
		841	}
		842
		843	void
		844	ev_loop_fork (EV_P)
		845	{
		846	postfork = 1;
		847	}
		848
		849	#endif
		850
		851	#if EV_MULTIPLICITY
		852	struct ev_loop *
		853	#else
		854	int
		855	#endif
		856	ev_default_loop (int methods)
		857	{
		858	if (sigpipe [0] == sigpipe [1])
312	if (pipe (sigpipe))	859	if (pipe (sigpipe))
313	return 0;	860	return 0;
314		861
315	ev_method = EVMETHOD_NONE;	862	if (!default_loop)
316	#if HAVE_EPOLL	863	{
317	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	864	#if EV_MULTIPLICITY
		865	struct ev_loop *loop = default_loop = &default_loop_struct;
		866	#else
		867	default_loop = 1;
318	#endif	868	#endif
319	#if HAVE_SELECT
320	if (ev_method == EVMETHOD_NONE) select_init (flags);
321	#endif
322		869
		870	loop_init (EV_A_ methods);
		871
		872	if (ev_method (EV_A))
		873	{
		874	siginit (EV_A);
		875
		876	#ifndef WIN32
		877	ev_signal_init (&childev, childcb, SIGCHLD);
		878	ev_set_priority (&childev, EV_MAXPRI);
		879	ev_signal_start (EV_A_ &childev);
		880	ev_unref (EV_A); /* child watcher should not keep loop alive */
		881	#endif
		882	}
		883	else
		884	default_loop = 0;
		885	}
		886
		887	return default_loop;
		888	}
		889
		890	void
		891	ev_default_destroy (void)
		892	{
		893	#if EV_MULTIPLICITY
		894	struct ev_loop *loop = default_loop;
		895	#endif
		896
		897	#ifndef WIN32
		898	ev_ref (EV_A); /* child watcher */
		899	ev_signal_stop (EV_A_ &childev);
		900	#endif
		901
		902	ev_ref (EV_A); /* signal watcher */
		903	ev_io_stop (EV_A_ &sigev);
		904
		905	close (sigpipe [0]); sigpipe [0] = 0;
		906	close (sigpipe [1]); sigpipe [1] = 0;
		907
		908	loop_destroy (EV_A);
		909	}
		910
		911	void
		912	ev_default_fork (void)
		913	{
		914	#if EV_MULTIPLICITY
		915	struct ev_loop *loop = default_loop;
		916	#endif
		917
323	if (ev_method)	918	if (method)
324	{	919	postfork = 1;
325	evw_init (&sigev, sigcb);
326	siginit ();
327	}
328
329	return ev_method;
330	}	920	}
331		921
332	/*****************************************************************************/	922	/*****************************************************************************/
333		923
334	void ev_prefork (void)
335	{
336	/* nop */
337	}
338
339	void ev_postfork_parent (void)
340	{
341	/* nop */
342	}
343
344	void ev_postfork_child (void)
345	{
346	#if HAVE_EPOLL
347	if (ev_method == EVMETHOD_EPOLL)
348	epoll_postfork_child ();
349	#endif
350
351	evio_stop (&sigev);
352	close (sigpipe [0]);
353	close (sigpipe [1]);
354	pipe (sigpipe);
355	siginit ();
356	}
357
358	/*****************************************************************************/
359
360	static void	924	static int
361	fd_reify (void)	925	any_pending (EV_P)
362	{	926	{
363	int i;	927	int pri;
364		928
365	for (i = 0; i < fdchangecnt; ++i)	929	for (pri = NUMPRI; pri--; )
366	{	930	if (pendingcnt [pri])
367	int fd = fdchanges [i];	931	return 1;
368	ANFD *anfd = anfds + fd;
369	struct ev_io *w;
370		932
371	int wev = 0;	933	return 0;
372
373	for (w = anfd->head; w; w = w->next)
374	wev \|= w->events;
375
376	if (anfd->wev != wev)
377	{
378	method_modify (fd, anfd->wev, wev);
379	anfd->wev = wev;
380	}
381	}
382
383	fdchangecnt = 0;
384	}	934	}
385		935
386	static void	936	static void
387	call_pending ()	937	call_pending (EV_P)
388	{	938	{
389	int i;	939	int pri;
390		940
391	for (i = 0; i < pendingcnt; ++i)	941	for (pri = NUMPRI; pri--; )
		942	while (pendingcnt [pri])
392	{	943	{
393	ANPENDING *p = pendings + i;	944	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
394		945
395	if (p->w)	946	if (p->w)
396	{	947	{
397	p->w->pending = 0;	948	p->w->pending = 0;
398	p->w->cb (p->w, p->events);	949	p->w->cb (EV_A_ p->w, p->events);
399	}	950	}
400	}	951	}
401
402	pendingcnt = 0;
403	}	952	}
404		953
405	static void	954	static void
406	timers_reify ()	955	timers_reify (EV_P)
407	{	956	{
408	while (timercnt && timers [0]->at <= now)	957	while (timercnt && ((WT)timers [0])->at <= mn_now)
409	{	958	{
410	struct ev_timer *w = timers [0];	959	struct ev_timer *w = timers [0];
		960
		961	assert (("inactive timer on timer heap detected", ev_is_active (w)));
411		962
412	/* first reschedule or stop timer */	963	/* first reschedule or stop timer */
413	if (w->repeat)	964	if (w->repeat)
414	{	965	{
		966	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
415	w->at = now + w->repeat;	967	((WT)w)->at = mn_now + w->repeat;
416	assert (("timer timeout in the past, negative repeat?", w->at > now));
417	downheap ((WT *)timers, timercnt, 0);	968	downheap ((WT *)timers, timercnt, 0);
418	}	969	}
419	else	970	else
420	evtimer_stop (w); /* nonrepeating: stop timer */	971	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
421		972
422	event ((W)w, EV_TIMEOUT);	973	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
423	}	974	}
424	}	975	}
425		976
426	static void	977	static void
427	periodics_reify ()	978	periodics_reify (EV_P)
428	{	979	{
429	while (periodiccnt && periodics [0]->at <= ev_now)	980	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
430	{	981	{
431	struct ev_periodic *w = periodics [0];	982	struct ev_periodic *w = periodics [0];
432		983
		984	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		985
433	/* first reschedule or stop timer */	986	/* first reschedule or stop timer */
434	if (w->interval)	987	if (w->reschedule_cb)
435	{	988	{
		989	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001);
		990
		991	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));
		992	downheap ((WT *)periodics, periodiccnt, 0);
		993	}
		994	else if (w->interval)
		995	{
436	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	996	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
437	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	997	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
438	downheap ((WT *)periodics, periodiccnt, 0);	998	downheap ((WT *)periodics, periodiccnt, 0);
439	}	999	}
440	else	1000	else
441	evperiodic_stop (w); /* nonrepeating: stop timer */	1001	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
442		1002
443	event ((W)w, EV_TIMEOUT);	1003	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
444	}	1004	}
445	}	1005	}
446		1006
447	static void	1007	static void
448	periodics_reschedule (ev_tstamp diff)	1008	periodics_reschedule (EV_P)
449	{	1009	{
450	int i;	1010	int i;
451		1011
452	/* adjust periodics after time jump */	1012	/* adjust periodics after time jump */
453	for (i = 0; i < periodiccnt; ++i)	1013	for (i = 0; i < periodiccnt; ++i)
454	{	1014	{
455	struct ev_periodic *w = periodics [i];	1015	struct ev_periodic *w = periodics [i];
456		1016
		1017	if (w->reschedule_cb)
		1018	((WT)w)->at = w->reschedule_cb (w, rt_now);
457	if (w->interval)	1019	else if (w->interval)
		1020	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1021	}
		1022
		1023	/* now rebuild the heap */
		1024	for (i = periodiccnt >> 1; i--; )
		1025	downheap ((WT *)periodics, periodiccnt, i);
		1026	}
		1027
		1028	inline int
		1029	time_update_monotonic (EV_P)
		1030	{
		1031	mn_now = get_clock ();
		1032
		1033	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1034	{
		1035	rt_now = rtmn_diff + mn_now;
		1036	return 0;
		1037	}
		1038	else
		1039	{
		1040	now_floor = mn_now;
		1041	rt_now = ev_time ();
		1042	return 1;
		1043	}
		1044	}
		1045
		1046	static void
		1047	time_update (EV_P)
		1048	{
		1049	int i;
		1050
		1051	#if EV_USE_MONOTONIC
		1052	if (expect_true (have_monotonic))
		1053	{
		1054	if (time_update_monotonic (EV_A))
458	{	1055	{
459	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1056	ev_tstamp odiff = rtmn_diff;
460		1057
461	if (fabs (diff) >= 1e-4)	1058	for (i = 4; --i; ) /* loop a few times, before making important decisions */
462	{	1059	{
463	evperiodic_stop (w);	1060	rtmn_diff = rt_now - mn_now;
464	evperiodic_start (w);
465		1061
466	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1062	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1063	return; /* all is well */
		1064
		1065	rt_now = ev_time ();
		1066	mn_now = get_clock ();
		1067	now_floor = mn_now;
467	}	1068	}
		1069
		1070	periodics_reschedule (EV_A);
		1071	/* no timer adjustment, as the monotonic clock doesn't jump */
		1072	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
468	}	1073	}
469	}	1074	}
470	}	1075	else
471		1076	#endif
472	static void	1077	{
473	time_update ()
474	{
475	int i;
476
477	ev_now = ev_time ();	1078	rt_now = ev_time ();
478		1079
479	if (have_monotonic)	1080	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
480	{
481	ev_tstamp odiff = diff;
482
483	for (i = 4; --i; ) /* loop a few times, before making important decisions */
484	{	1081	{
485	now = get_clock ();
486	diff = ev_now - now;
487
488	if (fabs (odiff - diff) < MIN_TIMEJUMP)
489	return; /* all is well */
490
491	ev_now = ev_time ();
492	}
493
494	periodics_reschedule (diff - odiff);
495	/* no timer adjustment, as the monotonic clock doesn't jump */
496	}
497	else
498	{
499	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
500	{
501	periodics_reschedule (ev_now - now);	1082	periodics_reschedule (EV_A);
502		1083
503	/* adjust timers. this is easy, as the offset is the same for all */	1084	/* adjust timers. this is easy, as the offset is the same for all */
504	for (i = 0; i < timercnt; ++i)	1085	for (i = 0; i < timercnt; ++i)
505	timers [i]->at += diff;	1086	((WT)timers [i])->at += rt_now - mn_now;
506	}	1087	}
507		1088
508	now = ev_now;	1089	mn_now = rt_now;
509	}	1090	}
510	}	1091	}
511		1092
512	int ev_loop_done;	1093	void
		1094	ev_ref (EV_P)
		1095	{
		1096	++activecnt;
		1097	}
513		1098
		1099	void
		1100	ev_unref (EV_P)
		1101	{
		1102	--activecnt;
		1103	}
		1104
		1105	static int loop_done;
		1106
		1107	void
514	void ev_loop (int flags)	1108	ev_loop (EV_P_ int flags)
515	{	1109	{
516	double block;	1110	double block;
517	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1111	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
518
519	if (checkcnt)
520	{
521	queue_events ((W *)checks, checkcnt, EV_CHECK);
522	call_pending ();
523	}
524		1112
525	do	1113	do
526	{	1114	{
		1115	/* queue check watchers (and execute them) */
		1116	if (expect_false (preparecnt))
		1117	{
		1118	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1119	call_pending (EV_A);
		1120	}
		1121
		1122	/* we might have forked, so reify kernel state if necessary */
		1123	if (expect_false (postfork))
		1124	loop_fork (EV_A);
		1125
527	/* update fd-related kernel structures */	1126	/* update fd-related kernel structures */
528	fd_reify ();	1127	fd_reify (EV_A);
529		1128
530	/* calculate blocking time */	1129	/* calculate blocking time */
531		1130
532	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1131	/* we only need this for !monotonic clock or timers, but as we basically
		1132	always have timers, we just calculate it always */
		1133	#if EV_USE_MONOTONIC
		1134	if (expect_true (have_monotonic))
		1135	time_update_monotonic (EV_A);
		1136	else
		1137	#endif
		1138	{
533	ev_now = ev_time ();	1139	rt_now = ev_time ();
		1140	mn_now = rt_now;
		1141	}
534		1142
535	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1143	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
536	block = 0.;	1144	block = 0.;
537	else	1145	else
538	{	1146	{
539	block = MAX_BLOCKTIME;	1147	block = MAX_BLOCKTIME;
540		1148
541	if (timercnt)	1149	if (timercnt)
542	{	1150	{
543	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1151	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
544	if (block > to) block = to;	1152	if (block > to) block = to;
545	}	1153	}
546		1154
547	if (periodiccnt)	1155	if (periodiccnt)
548	{	1156	{
549	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1157	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
550	if (block > to) block = to;	1158	if (block > to) block = to;
551	}	1159	}
552		1160
553	if (block < 0.) block = 0.;	1161	if (block < 0.) block = 0.;
554	}	1162	}
555		1163
556	method_poll (block);	1164	method_poll (EV_A_ block);
557		1165
558	/* update ev_now, do magic */	1166	/* update rt_now, do magic */
559	time_update ();	1167	time_update (EV_A);
560		1168
561	/* queue pending timers and reschedule them */	1169	/* queue pending timers and reschedule them */
		1170	timers_reify (EV_A); /* relative timers called last */
562	periodics_reify (); /* absolute timers first */	1171	periodics_reify (EV_A); /* absolute timers called first */
563	timers_reify (); /* relative timers second */
564		1172
565	/* queue idle watchers unless io or timers are pending */	1173	/* queue idle watchers unless io or timers are pending */
566	if (!pendingcnt)	1174	if (idlecnt && !any_pending (EV_A))
567	queue_events ((W *)idles, idlecnt, EV_IDLE);	1175	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
568		1176
569	/* queue check and possibly idle watchers */	1177	/* queue check watchers, to be executed first */
		1178	if (checkcnt)
570	queue_events ((W *)checks, checkcnt, EV_CHECK);	1179	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
571		1180
572	call_pending ();	1181	call_pending (EV_A);
573	}	1182	}
574	while (!ev_loop_done);	1183	while (activecnt && !loop_done);
575		1184
576	if (ev_loop_done != 2)	1185	if (loop_done != 2)
577	ev_loop_done = 0;	1186	loop_done = 0;
		1187	}
		1188
		1189	void
		1190	ev_unloop (EV_P_ int how)
		1191	{
		1192	loop_done = how;
578	}	1193	}
579		1194
580	/*****************************************************************************/	1195	/*****************************************************************************/
581		1196
582	static void	1197	inline void
583	wlist_add (WL *head, WL elem)	1198	wlist_add (WL *head, WL elem)
584	{	1199	{
585	elem->next = *head;	1200	elem->next = *head;
586	*head = elem;	1201	*head = elem;
587	}	1202	}
588		1203
589	static void	1204	inline void
590	wlist_del (WL *head, WL elem)	1205	wlist_del (WL *head, WL elem)
591	{	1206	{
592	while (*head)	1207	while (*head)
593	{	1208	{
594	if (*head == elem)	1209	if (*head == elem)
599		1214
600	head = &(*head)->next;	1215	head = &(*head)->next;
601	}	1216	}
602	}	1217	}
603		1218
604	static void	1219	inline void
		1220	ev_clear_pending (EV_P_ W w)
		1221	{
		1222	if (w->pending)
		1223	{
		1224	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1225	w->pending = 0;
		1226	}
		1227	}
		1228
		1229	inline void
605	ev_start (W w, int active)	1230	ev_start (EV_P_ W w, int active)
606	{	1231	{
607	w->pending = 0;	1232	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1233	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1234
608	w->active = active;	1235	w->active = active;
		1236	ev_ref (EV_A);
609	}	1237	}
610		1238
611	static void	1239	inline void
612	ev_stop (W w)	1240	ev_stop (EV_P_ W w)
613	{	1241	{
614	if (w->pending)	1242	ev_unref (EV_A);
615	pendings [w->pending - 1].w = 0;
616
617	w->active = 0;	1243	w->active = 0;
618	}	1244	}
619		1245
620	/*****************************************************************************/	1246	/*****************************************************************************/
621		1247
622	void	1248	void
623	evio_start (struct ev_io *w)	1249	ev_io_start (EV_P_ struct ev_io *w)
624	{	1250	{
		1251	int fd = w->fd;
		1252
625	if (ev_is_active (w))	1253	if (ev_is_active (w))
626	return;	1254	return;
627		1255
628	int fd = w->fd;	1256	assert (("ev_io_start called with negative fd", fd >= 0));
629		1257
630	ev_start ((W)w, 1);	1258	ev_start (EV_A_ (W)w, 1);
631	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1259	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
632	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1260	wlist_add ((WL *)&anfds[fd].head, (WL)w);
633		1261
634	++fdchangecnt;	1262	fd_change (EV_A_ fd);
635	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
636	fdchanges [fdchangecnt - 1] = fd;
637	}	1263	}
638		1264
639	void	1265	void
640	evio_stop (struct ev_io *w)	1266	ev_io_stop (EV_P_ struct ev_io *w)
641	{	1267	{
		1268	ev_clear_pending (EV_A_ (W)w);
642	if (!ev_is_active (w))	1269	if (!ev_is_active (w))
643	return;	1270	return;
644		1271
645	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1272	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
646	ev_stop ((W)w);	1273	ev_stop (EV_A_ (W)w);
647		1274
648	++fdchangecnt;	1275	fd_change (EV_A_ w->fd);
649	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
650	fdchanges [fdchangecnt - 1] = w->fd;
651	}	1276	}
652		1277
653
654	void	1278	void
655	evtimer_start (struct ev_timer *w)	1279	ev_timer_start (EV_P_ struct ev_timer *w)
656	{	1280	{
657	if (ev_is_active (w))	1281	if (ev_is_active (w))
658	return;	1282	return;
659		1283
660	w->at += now;	1284	((WT)w)->at += mn_now;
661		1285
662	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1286	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
663		1287
664	ev_start ((W)w, ++timercnt);	1288	ev_start (EV_A_ (W)w, ++timercnt);
665	array_needsize (timers, timermax, timercnt, );	1289	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
666	timers [timercnt - 1] = w;	1290	timers [timercnt - 1] = w;
667	upheap ((WT *)timers, timercnt - 1);	1291	upheap ((WT *)timers, timercnt - 1);
668	}
669		1292
		1293	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1294	}
		1295
670	void	1296	void
671	evtimer_stop (struct ev_timer *w)	1297	ev_timer_stop (EV_P_ struct ev_timer *w)
672	{	1298	{
		1299	ev_clear_pending (EV_A_ (W)w);
673	if (!ev_is_active (w))	1300	if (!ev_is_active (w))
674	return;	1301	return;
675		1302
		1303	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1304
676	if (w->active < timercnt--)	1305	if (((W)w)->active < timercnt--)
677	{	1306	{
678	timers [w->active - 1] = timers [timercnt];	1307	timers [((W)w)->active - 1] = timers [timercnt];
679	downheap ((WT *)timers, timercnt, w->active - 1);	1308	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
680	}	1309	}
681		1310
682	w->at = w->repeat;	1311	((WT)w)->at = w->repeat;
683		1312
684	ev_stop ((W)w);	1313	ev_stop (EV_A_ (W)w);
685	}	1314	}
686		1315
687	void	1316	void
688	evtimer_again (struct ev_timer *w)	1317	ev_timer_again (EV_P_ struct ev_timer *w)
689	{	1318	{
690	if (ev_is_active (w))	1319	if (ev_is_active (w))
691	{	1320	{
692	if (w->repeat)	1321	if (w->repeat)
693	{	1322	{
694	w->at = now + w->repeat;	1323	((WT)w)->at = mn_now + w->repeat;
695	downheap ((WT *)timers, timercnt, w->active - 1);	1324	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
696	}	1325	}
697	else	1326	else
698	evtimer_stop (w);	1327	ev_timer_stop (EV_A_ w);
699	}	1328	}
700	else if (w->repeat)	1329	else if (w->repeat)
701	evtimer_start (w);	1330	ev_timer_start (EV_A_ w);
702	}	1331	}
703		1332
704	void	1333	void
705	evperiodic_start (struct ev_periodic *w)	1334	ev_periodic_start (EV_P_ struct ev_periodic *w)
706	{	1335	{
707	if (ev_is_active (w))	1336	if (ev_is_active (w))
708	return;	1337	return;
709		1338
710	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1339	if (w->reschedule_cb)
711		1340	((WT)w)->at = w->reschedule_cb (w, rt_now);
		1341	else if (w->interval)
		1342	{
		1343	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
712	/* this formula differs from the one in periodic_reify because we do not always round up */	1344	/* this formula differs from the one in periodic_reify because we do not always round up */
713	if (w->interval)
714	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1345	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1346	}
715		1347
716	ev_start ((W)w, ++periodiccnt);	1348	ev_start (EV_A_ (W)w, ++periodiccnt);
717	array_needsize (periodics, periodicmax, periodiccnt, );	1349	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
718	periodics [periodiccnt - 1] = w;	1350	periodics [periodiccnt - 1] = w;
719	upheap ((WT *)periodics, periodiccnt - 1);	1351	upheap ((WT *)periodics, periodiccnt - 1);
720	}
721		1352
		1353	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1354	}
		1355
722	void	1356	void
723	evperiodic_stop (struct ev_periodic *w)	1357	ev_periodic_stop (EV_P_ struct ev_periodic *w)
724	{	1358	{
		1359	ev_clear_pending (EV_A_ (W)w);
725	if (!ev_is_active (w))	1360	if (!ev_is_active (w))
726	return;	1361	return;
727		1362
		1363	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1364
728	if (w->active < periodiccnt--)	1365	if (((W)w)->active < periodiccnt--)
729	{	1366	{
730	periodics [w->active - 1] = periodics [periodiccnt];	1367	periodics [((W)w)->active - 1] = periodics [periodiccnt];
731	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1368	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
732	}	1369	}
733		1370
734	ev_stop ((W)w);	1371	ev_stop (EV_A_ (W)w);
735	}	1372	}
736		1373
737	void	1374	void
738	evsignal_start (struct ev_signal *w)	1375	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1376	{
		1377	ev_periodic_stop (EV_A_ w);
		1378	ev_periodic_start (EV_A_ w);
		1379	}
		1380
		1381	void
		1382	ev_idle_start (EV_P_ struct ev_idle *w)
739	{	1383	{
740	if (ev_is_active (w))	1384	if (ev_is_active (w))
741	return;	1385	return;
742		1386
		1387	ev_start (EV_A_ (W)w, ++idlecnt);
		1388	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1389	idles [idlecnt - 1] = w;
		1390	}
		1391
		1392	void
		1393	ev_idle_stop (EV_P_ struct ev_idle *w)
		1394	{
		1395	ev_clear_pending (EV_A_ (W)w);
		1396	if (ev_is_active (w))
		1397	return;
		1398
		1399	idles [((W)w)->active - 1] = idles [--idlecnt];
		1400	ev_stop (EV_A_ (W)w);
		1401	}
		1402
		1403	void
		1404	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1405	{
		1406	if (ev_is_active (w))
		1407	return;
		1408
		1409	ev_start (EV_A_ (W)w, ++preparecnt);
		1410	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1411	prepares [preparecnt - 1] = w;
		1412	}
		1413
		1414	void
		1415	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1416	{
		1417	ev_clear_pending (EV_A_ (W)w);
		1418	if (ev_is_active (w))
		1419	return;
		1420
		1421	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1422	ev_stop (EV_A_ (W)w);
		1423	}
		1424
		1425	void
		1426	ev_check_start (EV_P_ struct ev_check *w)
		1427	{
		1428	if (ev_is_active (w))
		1429	return;
		1430
		1431	ev_start (EV_A_ (W)w, ++checkcnt);
		1432	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1433	checks [checkcnt - 1] = w;
		1434	}
		1435
		1436	void
		1437	ev_check_stop (EV_P_ struct ev_check *w)
		1438	{
		1439	ev_clear_pending (EV_A_ (W)w);
		1440	if (ev_is_active (w))
		1441	return;
		1442
		1443	checks [((W)w)->active - 1] = checks [--checkcnt];
		1444	ev_stop (EV_A_ (W)w);
		1445	}
		1446
		1447	#ifndef SA_RESTART
		1448	# define SA_RESTART 0
		1449	#endif
		1450
		1451	void
		1452	ev_signal_start (EV_P_ struct ev_signal *w)
		1453	{
		1454	#if EV_MULTIPLICITY
		1455	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1456	#endif
		1457	if (ev_is_active (w))
		1458	return;
		1459
		1460	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1461
743	ev_start ((W)w, 1);	1462	ev_start (EV_A_ (W)w, 1);
744	array_needsize (signals, signalmax, w->signum, signals_init);	1463	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
745	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1464	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
746		1465
747	if (!w->next)	1466	if (!((WL)w)->next)
748	{	1467	{
		1468	#if WIN32
		1469	signal (w->signum, sighandler);
		1470	#else
749	struct sigaction sa;	1471	struct sigaction sa;
750	sa.sa_handler = sighandler;	1472	sa.sa_handler = sighandler;
751	sigfillset (&sa.sa_mask);	1473	sigfillset (&sa.sa_mask);
752	sa.sa_flags = 0;	1474	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
753	sigaction (w->signum, &sa, 0);	1475	sigaction (w->signum, &sa, 0);
		1476	#endif
754	}	1477	}
755	}	1478	}
756		1479
757	void	1480	void
758	evsignal_stop (struct ev_signal *w)	1481	ev_signal_stop (EV_P_ struct ev_signal *w)
759	{	1482	{
		1483	ev_clear_pending (EV_A_ (W)w);
760	if (!ev_is_active (w))	1484	if (!ev_is_active (w))
761	return;	1485	return;
762		1486
763	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1487	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
764	ev_stop ((W)w);	1488	ev_stop (EV_A_ (W)w);
765		1489
766	if (!signals [w->signum - 1].head)	1490	if (!signals [w->signum - 1].head)
767	signal (w->signum, SIG_DFL);	1491	signal (w->signum, SIG_DFL);
768	}	1492	}
769		1493
770	void evidle_start (struct ev_idle *w)	1494	void
		1495	ev_child_start (EV_P_ struct ev_child *w)
771	{	1496	{
		1497	#if EV_MULTIPLICITY
		1498	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1499	#endif
772	if (ev_is_active (w))	1500	if (ev_is_active (w))
773	return;	1501	return;
774		1502
775	ev_start ((W)w, ++idlecnt);	1503	ev_start (EV_A_ (W)w, 1);
776	array_needsize (idles, idlemax, idlecnt, );	1504	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
777	idles [idlecnt - 1] = w;
778	}	1505	}
779		1506
780	void evidle_stop (struct ev_idle *w)	1507	void
		1508	ev_child_stop (EV_P_ struct ev_child *w)
781	{	1509	{
782	idles [w->active - 1] = idles [--idlecnt];	1510	ev_clear_pending (EV_A_ (W)w);
783	ev_stop ((W)w);
784	}
785
786	void evcheck_start (struct ev_check *w)
787	{
788	if (ev_is_active (w))	1511	if (ev_is_active (w))
789	return;	1512	return;
790		1513
791	ev_start ((W)w, ++checkcnt);	1514	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
792	array_needsize (checks, checkmax, checkcnt, );
793	checks [checkcnt - 1] = w;
794	}
795
796	void evcheck_stop (struct ev_check *w)
797	{
798	checks [w->active - 1] = checks [--checkcnt];
799	ev_stop ((W)w);	1515	ev_stop (EV_A_ (W)w);
800	}	1516	}
801		1517
802	/*****************************************************************************/	1518	/*****************************************************************************/
803		1519
804	#if 0	1520	struct ev_once
805		1521	{
806	struct ev_io wio;	1522	struct ev_io io;
807
808	static void
809	sin_cb (struct ev_io *w, int revents)
810	{
811	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
812	}
813
814	static void
815	ocb (struct ev_timer *w, int revents)
816	{
817	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
818	evtimer_stop (w);
819	evtimer_start (w);
820	}
821
822	static void
823	scb (struct ev_signal *w, int revents)
824	{
825	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
826	evio_stop (&wio);
827	evio_start (&wio);
828	}
829
830	static void
831	gcb (struct ev_signal *w, int revents)
832	{
833	fprintf (stderr, "generic %x\n", revents);
834
835	}
836
837	int main (void)
838	{
839	ev_init (0);
840
841	evio_init (&wio, sin_cb, 0, EV_READ);
842	evio_start (&wio);
843
844	struct ev_timer t[10000];
845
846	#if 0
847	int i;
848	for (i = 0; i < 10000; ++i)
849	{
850	struct ev_timer *w = t + i;
851	evw_init (w, ocb, i);
852	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
853	evtimer_start (w);
854	if (drand48 () < 0.5)
855	evtimer_stop (w);
856	}
857	#endif
858
859	struct ev_timer t1;	1523	struct ev_timer to;
860	evtimer_init (&t1, ocb, 5, 10);	1524	void (cb)(int revents, void arg);
861	evtimer_start (&t1);	1525	void *arg;
		1526	};
862		1527
863	struct ev_signal sig;	1528	static void
864	evsignal_init (&sig, scb, SIGQUIT);	1529	once_cb (EV_P_ struct ev_once *once, int revents)
865	evsignal_start (&sig);	1530	{
		1531	void (cb)(int revents, void arg) = once->cb;
		1532	void *arg = once->arg;
866		1533
867	struct ev_check cw;	1534	ev_io_stop (EV_A_ &once->io);
868	evcheck_init (&cw, gcb);	1535	ev_timer_stop (EV_A_ &once->to);
869	evcheck_start (&cw);	1536	ev_free (once);
870		1537
871	struct ev_idle iw;	1538	cb (revents, arg);
872	evidle_init (&iw, gcb);
873	evidle_start (&iw);
874
875	ev_loop (0);
876
877	return 0;
878	}	1539	}
879		1540
880	#endif	1541	static void
		1542	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1543	{
		1544	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1545	}
881		1546
		1547	static void
		1548	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1549	{
		1550	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1551	}
882		1552
		1553	void
		1554	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1555	{
		1556	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
883		1557
		1558	if (!once)
		1559	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1560	else
		1561	{
		1562	once->cb = cb;
		1563	once->arg = arg;
884		1564
		1565	ev_watcher_init (&once->io, once_cb_io);
		1566	if (fd >= 0)
		1567	{
		1568	ev_io_set (&once->io, fd, events);
		1569	ev_io_start (EV_A_ &once->io);
		1570	}
		1571
		1572	ev_watcher_init (&once->to, once_cb_to);
		1573	if (timeout >= 0.)
		1574	{
		1575	ev_timer_set (&once->to, timeout, 0.);
		1576	ev_timer_start (EV_A_ &once->to);
		1577	}
		1578	}
		1579	}
		1580

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Comparing libev/ev.c (file contents): Revision 1.14 by root, Wed Oct 31 11:52:12 2007 UTC vs. Revision 1.80 by root, Fri Nov 9 15:30:59 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.14 by root, Wed Oct 31 11:52:12 2007 UTC vs.
Revision 1.80 by root, Fri Nov 9 15:30:59 2007 UTC