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

Comparing libev/ev.c (file contents):
Revision 1.11 by root, Wed Oct 31 07:40:49 2007 UTC vs.
Revision 1.101 by root, Sun Nov 11 04:04:23 2007 UTC

…		…
		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without
		8	* modification, are permitted provided that the following conditions are
		9	* met:
		10	*
		11	* * Redistributions of source code must retain the above copyright
		12	* notice, this list of conditions and the following disclaimer.
		13	*
		14	* * Redistributions in binary form must reproduce the above
		15	* copyright notice, this list of conditions and the following
		16	* disclaimer in the documentation and/or other materials provided
		17	* with the distribution.
		18	*
		19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
		22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
		23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
		24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
		25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
		29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		30	*/
		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
		37	# include "config.h"
		38
		39	# if HAVE_CLOCK_GETTIME
		40	# ifndef EV_USE_MONOTONIC
		41	# define EV_USE_MONOTONIC 1
		42	# endif
		43	# ifndef EV_USE_REALTIME
		44	# define EV_USE_REALTIME 1
		45	# endif
		46	# endif
		47
		48	# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT)
		49	# define EV_USE_SELECT 1
		50	# endif
		51
		52	# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL)
		53	# define EV_USE_POLL 1
		54	# endif
		55
		56	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL)
		57	# define EV_USE_EPOLL 1
		58	# endif
		59
		60	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE)
		61	# define EV_USE_KQUEUE 1
		62	# endif
		63
		64	#endif
		65
1	#include <math.h>	66	#include <math.h>
2	#include <stdlib.h>	67	#include <stdlib.h>
3	#include <unistd.h>
4	#include <fcntl.h>	68	#include <fcntl.h>
5	#include <signal.h>	69	#include <stddef.h>
6		70
7	#include <stdio.h>	71	#include <stdio.h>
8		72
9	#include <assert.h>	73	#include <assert.h>
10	#include <errno.h>	74	#include <errno.h>
11	#include <sys/time.h>	75	#include <sys/types.h>
12	#include <time.h>	76	#include <time.h>
13		77
		78	#include <signal.h>
		79
		80	#ifndef WIN32
		81	# include <unistd.h>
		82	# include <sys/time.h>
		83	# include <sys/wait.h>
		84	#endif
		85	/**/
		86
14	#ifndef HAVE_MONOTONIC	87	#ifndef EV_USE_MONOTONIC
15	# ifdef CLOCK_MONOTONIC
16	# define HAVE_MONOTONIC 1	88	# define EV_USE_MONOTONIC 1
		89	#endif
		90
		91	#ifndef EV_USE_SELECT
		92	# define EV_USE_SELECT 1
		93	#endif
		94
		95	#ifndef EV_USE_POLL
		96	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		97	#endif
		98
		99	#ifndef EV_USE_EPOLL
		100	# define EV_USE_EPOLL 0
		101	#endif
		102
		103	#ifndef EV_USE_KQUEUE
		104	# define EV_USE_KQUEUE 0
		105	#endif
		106
		107	#ifndef EV_USE_WIN32
		108	# ifdef WIN32
		109	# define EV_USE_WIN32 0 /* it does not exist, use select */
		110	# undef EV_USE_SELECT
		111	# define EV_USE_SELECT 1
		112	# else
		113	# define EV_USE_WIN32 0
17	# endif	114	# endif
18	#endif	115	#endif
19		116
20	#ifndef HAVE_SELECT
21	# define HAVE_SELECT 1
22	#endif
23
24	#ifndef HAVE_EPOLL
25	# define HAVE_EPOLL 0
26	#endif
27
28	#ifndef HAVE_REALTIME	117	#ifndef EV_USE_REALTIME
29	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	118	# define EV_USE_REALTIME 1
30	#endif	119	#endif
		120
		121	/**/
		122
		123	#ifndef CLOCK_MONOTONIC
		124	# undef EV_USE_MONOTONIC
		125	# define EV_USE_MONOTONIC 0
		126	#endif
		127
		128	#ifndef CLOCK_REALTIME
		129	# undef EV_USE_REALTIME
		130	# define EV_USE_REALTIME 0
		131	#endif
		132
		133	/**/
31		134
32	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	135	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
33	#define MAX_BLOCKTIME 60.	136	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		137	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		138	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
34		139
		140	#ifdef EV_H
		141	# include EV_H
		142	#else
35	#include "ev.h"	143	# include "ev.h"
		144	#endif
36		145
37	struct ev_watcher {	146	#if __GNUC__ >= 3
38	EV_WATCHER (ev_watcher);	147	# define expect(expr,value) __builtin_expect ((expr),(value))
39	};	148	# define inline inline
		149	#else
		150	# define expect(expr,value) (expr)
		151	# define inline static
		152	#endif
40		153
41	struct ev_watcher_list {	154	#define expect_false(expr) expect ((expr) != 0, 0)
42	EV_WATCHER_LIST (ev_watcher_list);	155	#define expect_true(expr) expect ((expr) != 0, 1)
43	};	156
		157	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		158	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
44		159
45	typedef struct ev_watcher *W;	160	typedef struct ev_watcher *W;
46	typedef struct ev_watcher_list *WL;	161	typedef struct ev_watcher_list *WL;
		162	typedef struct ev_watcher_time *WT;
47		163
48	static ev_tstamp now, diff; /* monotonic clock */	164	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		165
		166	#ifdef WIN32
		167	# include "ev_win32.c"
		168	#endif
		169
		170	/*****************************************************************************/
		171
		172	static void (syserr_cb)(const char msg);
		173
		174	void ev_set_syserr_cb (void (cb)(const char msg))
		175	{
		176	syserr_cb = cb;
		177	}
		178
		179	static void
		180	syserr (const char *msg)
		181	{
		182	if (!msg)
		183	msg = "(libev) system error";
		184
		185	if (syserr_cb)
		186	syserr_cb (msg);
		187	else
		188	{
		189	perror (msg);
		190	abort ();
		191	}
		192	}
		193
		194	static void (alloc)(void *ptr, long size);
		195
		196	void ev_set_allocator (void (cb)(void *ptr, long size))
		197	{
		198	alloc = cb;
		199	}
		200
		201	static void *
		202	ev_realloc (void *ptr, long size)
		203	{
		204	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		205
		206	if (!ptr && size)
		207	{
		208	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		209	abort ();
		210	}
		211
		212	return ptr;
		213	}
		214
		215	#define ev_malloc(size) ev_realloc (0, (size))
		216	#define ev_free(ptr) ev_realloc ((ptr), 0)
		217
		218	/*****************************************************************************/
		219
		220	typedef struct
		221	{
		222	WL head;
		223	unsigned char events;
		224	unsigned char reify;
		225	} ANFD;
		226
		227	typedef struct
		228	{
		229	W w;
		230	int events;
		231	} ANPENDING;
		232
		233	#if EV_MULTIPLICITY
		234
		235	struct ev_loop
		236	{
		237	ev_tstamp ev_rt_now;
		238	#define ev_rt_now ((loop)->ev_rt_now)
		239	#define VAR(name,decl) decl;
		240	#include "ev_vars.h"
		241	#undef VAR
		242	};
		243	#include "ev_wrap.h"
		244
		245	struct ev_loop default_loop_struct;
		246	static struct ev_loop *default_loop;
		247
		248	#else
		249
49	ev_tstamp ev_now;	250	ev_tstamp ev_rt_now;
50	int ev_method;	251	#define VAR(name,decl) static decl;
		252	#include "ev_vars.h"
		253	#undef VAR
51		254
52	static int have_monotonic; /* runtime */	255	static int default_loop;
53		256
54	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	257	#endif
55	static void (*method_modify)(int fd, int oev, int nev);
56	static void (*method_poll)(ev_tstamp timeout);
57		258
58	/*****************************************************************************/	259	/*****************************************************************************/
59		260
60	ev_tstamp	261	ev_tstamp
61	ev_time (void)	262	ev_time (void)
62	{	263	{
63	#if HAVE_REALTIME	264	#if EV_USE_REALTIME
64	struct timespec ts;	265	struct timespec ts;
65	clock_gettime (CLOCK_REALTIME, &ts);	266	clock_gettime (CLOCK_REALTIME, &ts);
66	return ts.tv_sec + ts.tv_nsec * 1e-9;	267	return ts.tv_sec + ts.tv_nsec * 1e-9;
67	#else	268	#else
68	struct timeval tv;	269	struct timeval tv;
69	gettimeofday (&tv, 0);	270	gettimeofday (&tv, 0);
70	return tv.tv_sec + tv.tv_usec * 1e-6;	271	return tv.tv_sec + tv.tv_usec * 1e-6;
71	#endif	272	#endif
72	}	273	}
73		274
74	static ev_tstamp	275	inline ev_tstamp
75	get_clock (void)	276	get_clock (void)
76	{	277	{
77	#if HAVE_MONOTONIC	278	#if EV_USE_MONOTONIC
78	if (have_monotonic)	279	if (expect_true (have_monotonic))
79	{	280	{
80	struct timespec ts;	281	struct timespec ts;
81	clock_gettime (CLOCK_MONOTONIC, &ts);	282	clock_gettime (CLOCK_MONOTONIC, &ts);
82	return ts.tv_sec + ts.tv_nsec * 1e-9;	283	return ts.tv_sec + ts.tv_nsec * 1e-9;
83	}	284	}
84	#endif	285	#endif
85		286
86	return ev_time ();	287	return ev_time ();
87	}	288	}
88		289
		290	#if EV_MULTIPLICITY
		291	ev_tstamp
		292	ev_now (EV_P)
		293	{
		294	return ev_rt_now;
		295	}
		296	#endif
		297
		298	#define array_roundsize(type,n) ((n) \| 4 & ~3)
		299
89	#define array_needsize(base,cur,cnt,init) \	300	#define array_needsize(type,base,cur,cnt,init) \
90	if ((cnt) > cur) \	301	if (expect_false ((cnt) > cur)) \
91	{ \	302	{ \
92	int newcnt = cur ? cur << 1 : 16; \	303	int newcnt = cur; \
93	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	304	do \
		305	{ \
		306	newcnt = array_roundsize (type, newcnt << 1); \
		307	} \
		308	while ((cnt) > newcnt); \
		309	\
94	base = realloc (base, sizeof (base) (newcnt)); \	310	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
95	init (base + cur, newcnt - cur); \	311	init (base + cur, newcnt - cur); \
96	cur = newcnt; \	312	cur = newcnt; \
97	}	313	}
		314
		315	#define array_slim(type,stem) \
		316	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		317	{ \
		318	stem ## max = array_roundsize (stem ## cnt >> 1); \
		319	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
		320	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		321	}
		322
		323	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		324	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		325	#define array_free_microshit(stem) \
		326	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		327
		328	#define array_free(stem, idx) \
		329	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
98		330
99	/*****************************************************************************/	331	/*****************************************************************************/
100		332
101	typedef struct
102	{
103	struct ev_io *head;
104	unsigned char wev, rev; /* want, received event set */
105	} ANFD;
106
107	static ANFD *anfds;
108	static int anfdmax;
109
110	static int *fdchanges;
111	static int fdchangemax, fdchangecnt;
112
113	static void	333	static void
114	anfds_init (ANFD *base, int count)	334	anfds_init (ANFD *base, int count)
115	{	335	{
116	while (count--)	336	while (count--)
117	{	337	{
118	base->head = 0;	338	base->head = 0;
119	base->wev = base->rev = EV_NONE;	339	base->events = EV_NONE;
		340	base->reify = 0;
		341
120	++base;	342	++base;
121	}	343	}
122	}	344	}
123		345
124	typedef struct	346	void
		347	ev_feed_event (EV_P_ void *w, int revents)
125	{	348	{
126	W w;	349	W w_ = (W)w;
127	int events;
128	} ANPENDING;
129		350
130	static ANPENDING *pendings;	351	if (w_->pending)
131	static int pendingmax, pendingcnt;	352	{
		353	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		354	return;
		355	}
132		356
133	static void
134	event (W w, int events)
135	{
136	w->pending = ++pendingcnt;	357	w_->pending = ++pendingcnt [ABSPRI (w_)];
137	array_needsize (pendings, pendingmax, pendingcnt, );	358	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
138	pendings [pendingcnt - 1].w = w;	359	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
139	pendings [pendingcnt - 1].events = events;	360	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
140	}	361	}
141		362
142	static void	363	static void
		364	queue_events (EV_P_ W *events, int eventcnt, int type)
		365	{
		366	int i;
		367
		368	for (i = 0; i < eventcnt; ++i)
		369	ev_feed_event (EV_A_ events [i], type);
		370	}
		371
		372	inline void
143	fd_event (int fd, int events)	373	fd_event (EV_P_ int fd, int revents)
144	{	374	{
145	ANFD *anfd = anfds + fd;	375	ANFD *anfd = anfds + fd;
146	struct ev_io *w;	376	struct ev_io *w;
147		377
148	for (w = anfd->head; w; w = w->next)	378	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
149	{	379	{
150	int ev = w->events & events;	380	int ev = w->events & revents;
151		381
152	if (ev)	382	if (ev)
153	event ((W)w, ev);	383	ev_feed_event (EV_A_ (W)w, ev);
154	}	384	}
155	}	385	}
156		386
		387	void
		388	ev_feed_fd_event (EV_P_ int fd, int revents)
		389	{
		390	fd_event (EV_A_ fd, revents);
		391	}
		392
		393	/*****************************************************************************/
		394
157	static void	395	static void
158	queue_events (W *events, int eventcnt, int type)	396	fd_reify (EV_P)
159	{	397	{
160	int i;	398	int i;
161		399
162	for (i = 0; i < eventcnt; ++i)	400	for (i = 0; i < fdchangecnt; ++i)
163	event (events [i], type);	401	{
		402	int fd = fdchanges [i];
		403	ANFD *anfd = anfds + fd;
		404	struct ev_io *w;
		405
		406	int events = 0;
		407
		408	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		409	events \|= w->events;
		410
		411	anfd->reify = 0;
		412
		413	method_modify (EV_A_ fd, anfd->events, events);
		414	anfd->events = events;
		415	}
		416
		417	fdchangecnt = 0;
		418	}
		419
		420	static void
		421	fd_change (EV_P_ int fd)
		422	{
		423	if (anfds [fd].reify)
		424	return;
		425
		426	anfds [fd].reify = 1;
		427
		428	++fdchangecnt;
		429	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		430	fdchanges [fdchangecnt - 1] = fd;
		431	}
		432
		433	static void
		434	fd_kill (EV_P_ int fd)
		435	{
		436	struct ev_io *w;
		437
		438	while ((w = (struct ev_io *)anfds [fd].head))
		439	{
		440	ev_io_stop (EV_A_ w);
		441	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		442	}
		443	}
		444
		445	static int
		446	fd_valid (int fd)
		447	{
		448	#ifdef WIN32
		449	return !!win32_get_osfhandle (fd);
		450	#else
		451	return fcntl (fd, F_GETFD) != -1;
		452	#endif
		453	}
		454
		455	/* called on EBADF to verify fds */
		456	static void
		457	fd_ebadf (EV_P)
		458	{
		459	int fd;
		460
		461	for (fd = 0; fd < anfdmax; ++fd)
		462	if (anfds [fd].events)
		463	if (!fd_valid (fd) == -1 && errno == EBADF)
		464	fd_kill (EV_A_ fd);
		465	}
		466
		467	/* called on ENOMEM in select/poll to kill some fds and retry */
		468	static void
		469	fd_enomem (EV_P)
		470	{
		471	int fd;
		472
		473	for (fd = anfdmax; fd--; )
		474	if (anfds [fd].events)
		475	{
		476	fd_kill (EV_A_ fd);
		477	return;
		478	}
		479	}
		480
		481	/* usually called after fork if method needs to re-arm all fds from scratch */
		482	static void
		483	fd_rearm_all (EV_P)
		484	{
		485	int fd;
		486
		487	/* this should be highly optimised to not do anything but set a flag */
		488	for (fd = 0; fd < anfdmax; ++fd)
		489	if (anfds [fd].events)
		490	{
		491	anfds [fd].events = 0;
		492	fd_change (EV_A_ fd);
		493	}
164	}	494	}
165		495
166	/*****************************************************************************/	496	/*****************************************************************************/
167		497
168	static struct ev_timer **atimers;
169	static int atimermax, atimercnt;
170
171	static struct ev_timer **rtimers;
172	static int rtimermax, rtimercnt;
173
174	static void	498	static void
175	upheap (struct ev_timer **timers, int k)	499	upheap (WT *heap, int k)
176	{	500	{
177	struct ev_timer *w = timers [k];	501	WT w = heap [k];
178		502
179	while (k && timers [k >> 1]->at > w->at)	503	while (k && heap [k >> 1]->at > w->at)
180	{	504	{
181	timers [k] = timers [k >> 1];	505	heap [k] = heap [k >> 1];
182	timers [k]->active = k + 1;	506	((W)heap [k])->active = k + 1;
183	k >>= 1;	507	k >>= 1;
184	}	508	}
185		509
186	timers [k] = w;	510	heap [k] = w;
187	timers [k]->active = k + 1;	511	((W)heap [k])->active = k + 1;
188		512
189	}	513	}
190		514
191	static void	515	static void
192	downheap (struct ev_timer **timers, int N, int k)	516	downheap (WT *heap, int N, int k)
193	{	517	{
194	struct ev_timer *w = timers [k];	518	WT w = heap [k];
195		519
196	while (k < (N >> 1))	520	while (k < (N >> 1))
197	{	521	{
198	int j = k << 1;	522	int j = k << 1;
199		523
200	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	524	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
201	++j;	525	++j;
202		526
203	if (w->at <= timers [j]->at)	527	if (w->at <= heap [j]->at)
204	break;	528	break;
205		529
206	timers [k] = timers [j];	530	heap [k] = heap [j];
207	timers [k]->active = k + 1;	531	((W)heap [k])->active = k + 1;
208	k = j;	532	k = j;
209	}	533	}
210		534
211	timers [k] = w;	535	heap [k] = w;
212	timers [k]->active = k + 1;	536	((W)heap [k])->active = k + 1;
		537	}
		538
		539	inline void
		540	adjustheap (WT *heap, int N, int k)
		541	{
		542	upheap (heap, k);
		543	downheap (heap, N, k);
213	}	544	}
214		545
215	/*****************************************************************************/	546	/*****************************************************************************/
216		547
217	typedef struct	548	typedef struct
218	{	549	{
219	struct ev_signal *head;	550	WL head;
220	sig_atomic_t gotsig;	551	sig_atomic_t volatile gotsig;
221	} ANSIG;	552	} ANSIG;
222		553
223	static ANSIG *signals;	554	static ANSIG *signals;
224	static int signalmax;	555	static int signalmax;
225		556
226	static int sigpipe [2];	557	static int sigpipe [2];
227	static sig_atomic_t gotsig;	558	static sig_atomic_t volatile gotsig;
228	static struct ev_io sigev;	559	static struct ev_io sigev;
229		560
230	static void	561	static void
231	signals_init (ANSIG *base, int count)	562	signals_init (ANSIG *base, int count)
232	{	563	{
233	while (count--)	564	while (count--)
234	{	565	{
235	base->head = 0;	566	base->head = 0;
236	base->gotsig = 0;	567	base->gotsig = 0;
		568
237	++base;	569	++base;
238	}	570	}
239	}	571	}
240		572
241	static void	573	static void
242	sighandler (int signum)	574	sighandler (int signum)
243	{	575	{
		576	#if WIN32
		577	signal (signum, sighandler);
		578	#endif
		579
244	signals [signum - 1].gotsig = 1;	580	signals [signum - 1].gotsig = 1;
245		581
246	if (!gotsig)	582	if (!gotsig)
247	{	583	{
		584	int old_errno = errno;
248	gotsig = 1;	585	gotsig = 1;
		586	#ifdef WIN32
		587	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		588	#else
249	write (sigpipe [1], &gotsig, 1);	589	write (sigpipe [1], &signum, 1);
		590	#endif
		591	errno = old_errno;
250	}	592	}
251	}	593	}
252		594
		595	void
		596	ev_feed_signal_event (EV_P_ int signum)
		597	{
		598	WL w;
		599
		600	#if EV_MULTIPLICITY
		601	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		602	#endif
		603
		604	--signum;
		605
		606	if (signum < 0 \|\| signum >= signalmax)
		607	return;
		608
		609	signals [signum].gotsig = 0;
		610
		611	for (w = signals [signum].head; w; w = w->next)
		612	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		613	}
		614
253	static void	615	static void
254	sigcb (struct ev_io *iow, int revents)	616	sigcb (EV_P_ struct ev_io *iow, int revents)
255	{	617	{
256	struct ev_signal *w;
257	int sig;	618	int signum;
258		619
		620	#ifdef WIN32
		621	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		622	#else
		623	read (sigpipe [0], &revents, 1);
		624	#endif
259	gotsig = 0;	625	gotsig = 0;
260	read (sigpipe [0], &revents, 1);
261		626
262	for (sig = signalmax; sig--; )	627	for (signum = signalmax; signum--; )
263	if (signals [sig].gotsig)	628	if (signals [signum].gotsig)
264	{	629	ev_feed_signal_event (EV_A_ signum + 1);
265	signals [sig].gotsig = 0;
266
267	for (w = signals [sig].head; w; w = w->next)
268	event ((W)w, EV_SIGNAL);
269	}
270	}	630	}
271		631
272	static void	632	static void
273	siginit (void)	633	siginit (EV_P)
274	{	634	{
		635	#ifndef WIN32
275	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	636	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
276	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	637	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
277		638
278	/* rather than sort out wether we really need nb, set it */	639	/* rather than sort out wether we really need nb, set it */
279	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	640	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
280	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	641	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		642	#endif
281		643
282	evio_set (&sigev, sigpipe [0], EV_READ);	644	ev_io_set (&sigev, sigpipe [0], EV_READ);
283	evio_start (&sigev);	645	ev_io_start (EV_A_ &sigev);
		646	ev_unref (EV_A); /* child watcher should not keep loop alive */
284	}	647	}
285		648
286	/*****************************************************************************/	649	/*****************************************************************************/
287		650
288	static struct ev_idle **idles;	651	static struct ev_child *childs [PID_HASHSIZE];
289	static int idlemax, idlecnt;
290		652
291	static struct ev_check **checks;	653	#ifndef WIN32
292	static int checkmax, checkcnt;	654
		655	static struct ev_signal childev;
		656
		657	#ifndef WCONTINUED
		658	# define WCONTINUED 0
		659	#endif
		660
		661	static void
		662	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		663	{
		664	struct ev_child *w;
		665
		666	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		667	if (w->pid == pid \|\| !w->pid)
		668	{
		669	ev_priority (w) = ev_priority (sw); /* need to do it now */
		670	w->rpid = pid;
		671	w->rstatus = status;
		672	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		673	}
		674	}
		675
		676	static void
		677	childcb (EV_P_ struct ev_signal *sw, int revents)
		678	{
		679	int pid, status;
		680
		681	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		682	{
		683	/* make sure we are called again until all childs have been reaped */
		684	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		685
		686	child_reap (EV_A_ sw, pid, pid, status);
		687	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		688	}
		689	}
		690
		691	#endif
293		692
294	/*****************************************************************************/	693	/*****************************************************************************/
295		694
		695	#if EV_USE_KQUEUE
		696	# include "ev_kqueue.c"
		697	#endif
296	#if HAVE_EPOLL	698	#if EV_USE_EPOLL
297	# include "ev_epoll.c"	699	# include "ev_epoll.c"
298	#endif	700	#endif
		701	#if EV_USE_POLL
		702	# include "ev_poll.c"
		703	#endif
299	#if HAVE_SELECT	704	#if EV_USE_SELECT
300	# include "ev_select.c"	705	# include "ev_select.c"
301	#endif	706	#endif
302		707
303	int ev_init (int flags)	708	int
		709	ev_version_major (void)
304	{	710	{
		711	return EV_VERSION_MAJOR;
		712	}
		713
		714	int
		715	ev_version_minor (void)
		716	{
		717	return EV_VERSION_MINOR;
		718	}
		719
		720	/* return true if we are running with elevated privileges and should ignore env variables */
		721	static int
		722	enable_secure (void)
		723	{
		724	#ifdef WIN32
		725	return 0;
		726	#else
		727	return getuid () != geteuid ()
		728	\|\| getgid () != getegid ();
		729	#endif
		730	}
		731
		732	int
		733	ev_method (EV_P)
		734	{
		735	return method;
		736	}
		737
		738	static void
		739	loop_init (EV_P_ int methods)
		740	{
		741	if (!method)
		742	{
305	#if HAVE_MONOTONIC	743	#if EV_USE_MONOTONIC
306	{	744	{
307	struct timespec ts;	745	struct timespec ts;
308	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	746	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
309	have_monotonic = 1;	747	have_monotonic = 1;
310	}	748	}
311	#endif	749	#endif
312		750
313	ev_now = ev_time ();	751	ev_rt_now = ev_time ();
314	now = get_clock ();	752	mn_now = get_clock ();
315	diff = ev_now - now;	753	now_floor = mn_now;
		754	rtmn_diff = ev_rt_now - mn_now;
316		755
		756	if (methods == EVMETHOD_AUTO)
		757	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		758	methods = atoi (getenv ("LIBEV_METHODS"));
		759	else
		760	methods = EVMETHOD_ANY;
		761
		762	method = 0;
		763	#if EV_USE_WIN32
		764	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		765	#endif
		766	#if EV_USE_KQUEUE
		767	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		768	#endif
		769	#if EV_USE_EPOLL
		770	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		771	#endif
		772	#if EV_USE_POLL
		773	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		774	#endif
		775	#if EV_USE_SELECT
		776	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		777	#endif
		778
		779	ev_init (&sigev, sigcb);
		780	ev_set_priority (&sigev, EV_MAXPRI);
		781	}
		782	}
		783
		784	void
		785	loop_destroy (EV_P)
		786	{
		787	int i;
		788
		789	#if EV_USE_WIN32
		790	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		791	#endif
		792	#if EV_USE_KQUEUE
		793	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		794	#endif
		795	#if EV_USE_EPOLL
		796	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		797	#endif
		798	#if EV_USE_POLL
		799	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		800	#endif
		801	#if EV_USE_SELECT
		802	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		803	#endif
		804
		805	for (i = NUMPRI; i--; )
		806	array_free (pending, [i]);
		807
		808	/* have to use the microsoft-never-gets-it-right macro */
		809	array_free_microshit (fdchange);
		810	array_free_microshit (timer);
		811	#if EV_PERIODICS
		812	array_free_microshit (periodic);
		813	#endif
		814	array_free_microshit (idle);
		815	array_free_microshit (prepare);
		816	array_free_microshit (check);
		817
		818	method = 0;
		819	}
		820
		821	static void
		822	loop_fork (EV_P)
		823	{
		824	#if EV_USE_EPOLL
		825	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		826	#endif
		827	#if EV_USE_KQUEUE
		828	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		829	#endif
		830
		831	if (ev_is_active (&sigev))
		832	{
		833	/* default loop */
		834
		835	ev_ref (EV_A);
		836	ev_io_stop (EV_A_ &sigev);
		837	close (sigpipe [0]);
		838	close (sigpipe [1]);
		839
		840	while (pipe (sigpipe))
		841	syserr ("(libev) error creating pipe");
		842
		843	siginit (EV_A);
		844	}
		845
		846	postfork = 0;
		847	}
		848
		849	#if EV_MULTIPLICITY
		850	struct ev_loop *
		851	ev_loop_new (int methods)
		852	{
		853	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		854
		855	memset (loop, 0, sizeof (struct ev_loop));
		856
		857	loop_init (EV_A_ methods);
		858
		859	if (ev_method (EV_A))
		860	return loop;
		861
		862	return 0;
		863	}
		864
		865	void
		866	ev_loop_destroy (EV_P)
		867	{
		868	loop_destroy (EV_A);
		869	ev_free (loop);
		870	}
		871
		872	void
		873	ev_loop_fork (EV_P)
		874	{
		875	postfork = 1;
		876	}
		877
		878	#endif
		879
		880	#if EV_MULTIPLICITY
		881	struct ev_loop *
		882	#else
		883	int
		884	#endif
		885	ev_default_loop (int methods)
		886	{
		887	if (sigpipe [0] == sigpipe [1])
317	if (pipe (sigpipe))	888	if (pipe (sigpipe))
318	return 0;	889	return 0;
319		890
320	ev_method = EVMETHOD_NONE;	891	if (!default_loop)
321	#if HAVE_EPOLL	892	{
322	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	893	#if EV_MULTIPLICITY
		894	struct ev_loop *loop = default_loop = &default_loop_struct;
		895	#else
		896	default_loop = 1;
323	#endif	897	#endif
324	#if HAVE_SELECT
325	if (ev_method == EVMETHOD_NONE) select_init (flags);
326	#endif
327		898
		899	loop_init (EV_A_ methods);
		900
		901	if (ev_method (EV_A))
		902	{
		903	siginit (EV_A);
		904
		905	#ifndef WIN32
		906	ev_signal_init (&childev, childcb, SIGCHLD);
		907	ev_set_priority (&childev, EV_MAXPRI);
		908	ev_signal_start (EV_A_ &childev);
		909	ev_unref (EV_A); /* child watcher should not keep loop alive */
		910	#endif
		911	}
		912	else
		913	default_loop = 0;
		914	}
		915
		916	return default_loop;
		917	}
		918
		919	void
		920	ev_default_destroy (void)
		921	{
		922	#if EV_MULTIPLICITY
		923	struct ev_loop *loop = default_loop;
		924	#endif
		925
		926	#ifndef WIN32
		927	ev_ref (EV_A); /* child watcher */
		928	ev_signal_stop (EV_A_ &childev);
		929	#endif
		930
		931	ev_ref (EV_A); /* signal watcher */
		932	ev_io_stop (EV_A_ &sigev);
		933
		934	close (sigpipe [0]); sigpipe [0] = 0;
		935	close (sigpipe [1]); sigpipe [1] = 0;
		936
		937	loop_destroy (EV_A);
		938	}
		939
		940	void
		941	ev_default_fork (void)
		942	{
		943	#if EV_MULTIPLICITY
		944	struct ev_loop *loop = default_loop;
		945	#endif
		946
328	if (ev_method)	947	if (method)
329	{	948	postfork = 1;
330	evw_init (&sigev, sigcb, 0);
331	siginit ();
332	}
333
334	return ev_method;
335	}	949	}
336		950
337	/*****************************************************************************/	951	/*****************************************************************************/
338		952
339	void ev_prefork (void)
340	{
341	/* nop */
342	}
343
344	void ev_postfork_parent (void)
345	{
346	/* nop */
347	}
348
349	void ev_postfork_child (void)
350	{
351	#if HAVE_EPOLL
352	if (ev_method == EVMETHOD_EPOLL)
353	epoll_postfork_child ();
354	#endif
355
356	evio_stop (&sigev);
357	close (sigpipe [0]);
358	close (sigpipe [1]);
359	pipe (sigpipe);
360	siginit ();
361	}
362
363	/*****************************************************************************/
364
365	static void	953	static int
366	fd_reify (void)	954	any_pending (EV_P)
367	{	955	{
368	int i;	956	int pri;
369		957
370	for (i = 0; i < fdchangecnt; ++i)	958	for (pri = NUMPRI; pri--; )
371	{	959	if (pendingcnt [pri])
372	int fd = fdchanges [i];	960	return 1;
373	ANFD *anfd = anfds + fd;
374	struct ev_io *w;
375		961
376	int wev = 0;	962	return 0;
377
378	for (w = anfd->head; w; w = w->next)
379	wev \|= w->events;
380
381	if (anfd->wev != wev)
382	{
383	method_modify (fd, anfd->wev, wev);
384	anfd->wev = wev;
385	}
386	}
387
388	fdchangecnt = 0;
389	}	963	}
390		964
391	static void	965	static void
392	call_pending ()	966	call_pending (EV_P)
393	{	967	{
394	int i;	968	int pri;
395		969
396	for (i = 0; i < pendingcnt; ++i)	970	for (pri = NUMPRI; pri--; )
		971	while (pendingcnt [pri])
397	{	972	{
398	ANPENDING *p = pendings + i;	973	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
399		974
400	if (p->w)	975	if (p->w)
401	{	976	{
402	p->w->pending = 0;	977	p->w->pending = 0;
403	p->w->cb (p->w, p->events);	978	EV_CB_INVOKE (p->w, p->events);
404	}	979	}
405	}	980	}
406
407	pendingcnt = 0;
408	}	981	}
409		982
410	static void	983	static void
411	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	984	timers_reify (EV_P)
412	{	985	{
413	while (timercnt && timers [0]->at <= now)	986	while (timercnt && ((WT)timers [0])->at <= mn_now)
414	{	987	{
415	struct ev_timer *w = timers [0];	988	struct ev_timer *w = timers [0];
		989
		990	assert (("inactive timer on timer heap detected", ev_is_active (w)));
416		991
417	/* first reschedule or stop timer */	992	/* first reschedule or stop timer */
418	if (w->repeat)	993	if (w->repeat)
419	{	994	{
420	if (w->is_abs)	995	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
421	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;	996
422	else
423	w->at = now + w->repeat;	997	((WT)w)->at += w->repeat;
		998	if (((WT)w)->at < mn_now)
		999	((WT)w)->at = mn_now;
424		1000
425	assert (w->at > now);
426
427	downheap (timers, timercnt, 0);	1001	downheap ((WT *)timers, timercnt, 0);
428	}	1002	}
429	else	1003	else
		1004	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1005
		1006	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1007	}
		1008	}
		1009
		1010	#if EV_PERIODICS
		1011	static void
		1012	periodics_reify (EV_P)
		1013	{
		1014	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
		1015	{
		1016	struct ev_periodic *w = periodics [0];
		1017
		1018	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1019
		1020	/* first reschedule or stop timer */
		1021	if (w->reschedule_cb)
430	{	1022	{
431	evtimer_stop (w); /* nonrepeating: stop timer */	1023	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
432	--timercnt; /* maybe pass by reference instead? */	1024
		1025	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1026	downheap ((WT *)periodics, periodiccnt, 0);
433	}	1027	}
		1028	else if (w->interval)
		1029	{
		1030	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
		1031	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1032	downheap ((WT *)periodics, periodiccnt, 0);
		1033	}
		1034	else
		1035	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
434		1036
435	event ((W)w, EV_TIMEOUT);	1037	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
436	}	1038	}
437	}	1039	}
438		1040
439	static void	1041	static void
440	time_update ()	1042	periodics_reschedule (EV_P)
441	{	1043	{
442	int i;	1044	int i;
		1045
		1046	/* adjust periodics after time jump */
		1047	for (i = 0; i < periodiccnt; ++i)
		1048	{
		1049	struct ev_periodic *w = periodics [i];
		1050
		1051	if (w->reschedule_cb)
		1052	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1053	else if (w->interval)
		1054	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1055	}
		1056
		1057	/* now rebuild the heap */
		1058	for (i = periodiccnt >> 1; i--; )
		1059	downheap ((WT *)periodics, periodiccnt, i);
		1060	}
		1061	#endif
		1062
		1063	inline int
		1064	time_update_monotonic (EV_P)
		1065	{
		1066	mn_now = get_clock ();
		1067
		1068	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1069	{
		1070	ev_rt_now = rtmn_diff + mn_now;
		1071	return 0;
		1072	}
		1073	else
		1074	{
		1075	now_floor = mn_now;
443	ev_now = ev_time ();	1076	ev_rt_now = ev_time ();
444		1077	return 1;
445	if (have_monotonic)
446	{	1078	}
447	ev_tstamp odiff = diff;	1079	}
448		1080
449	/* detecting time jumps is much more difficult */	1081	static void
450	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1082	time_update (EV_P)
		1083	{
		1084	int i;
		1085
		1086	#if EV_USE_MONOTONIC
		1087	if (expect_true (have_monotonic))
		1088	{
		1089	if (time_update_monotonic (EV_A))
451	{	1090	{
452	now = get_clock ();	1091	ev_tstamp odiff = rtmn_diff;
		1092
		1093	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1094	{
453	diff = ev_now - now;	1095	rtmn_diff = ev_rt_now - mn_now;
454		1096
455	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1097	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
456	return; /* all is well */	1098	return; /* all is well */
457		1099
458	ev_now = ev_time ();	1100	ev_rt_now = ev_time ();
		1101	mn_now = get_clock ();
		1102	now_floor = mn_now;
		1103	}
		1104
		1105	# if EV_PERIODICS
		1106	periodics_reschedule (EV_A);
		1107	# endif
		1108	/* no timer adjustment, as the monotonic clock doesn't jump */
		1109	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
459	}	1110	}
		1111	}
		1112	else
		1113	#endif
		1114	{
		1115	ev_rt_now = ev_time ();
460		1116
461	/* time jump detected, reschedule atimers */	1117	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
462	for (i = 0; i < atimercnt; ++i)
463	{	1118	{
464	struct ev_timer *w = atimers [i];	1119	#if EV_PERIODICS
465	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1120	periodics_reschedule (EV_A);
		1121	#endif
		1122
		1123	/* adjust timers. this is easy, as the offset is the same for all */
		1124	for (i = 0; i < timercnt; ++i)
		1125	((WT)timers [i])->at += ev_rt_now - mn_now;
466	}	1126	}
467	}
468	else
469	{
470	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
471	/* time jump detected, adjust rtimers */
472	for (i = 0; i < rtimercnt; ++i)
473	rtimers [i]->at += ev_now - now;
474		1127
475	now = ev_now;	1128	mn_now = ev_rt_now;
476	}	1129	}
477	}	1130	}
478		1131
479	int ev_loop_done;	1132	void
		1133	ev_ref (EV_P)
		1134	{
		1135	++activecnt;
		1136	}
480		1137
		1138	void
		1139	ev_unref (EV_P)
		1140	{
		1141	--activecnt;
		1142	}
		1143
		1144	static int loop_done;
		1145
		1146	void
481	void ev_loop (int flags)	1147	ev_loop (EV_P_ int flags)
482	{	1148	{
483	double block;	1149	double block;
484	ev_loop_done = flags & EVLOOP_ONESHOT;	1150	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
485
486	if (checkcnt)
487	{
488	queue_events ((W *)checks, checkcnt, EV_CHECK);
489	call_pending ();
490	}
491		1151
492	do	1152	do
493	{	1153	{
		1154	/* queue check watchers (and execute them) */
		1155	if (expect_false (preparecnt))
		1156	{
		1157	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1158	call_pending (EV_A);
		1159	}
		1160
		1161	/* we might have forked, so reify kernel state if necessary */
		1162	if (expect_false (postfork))
		1163	loop_fork (EV_A);
		1164
494	/* update fd-related kernel structures */	1165	/* update fd-related kernel structures */
495	fd_reify ();	1166	fd_reify (EV_A);
496		1167
497	/* calculate blocking time */	1168	/* calculate blocking time */
		1169
		1170	/* we only need this for !monotonic clock or timers, but as we basically
		1171	always have timers, we just calculate it always */
		1172	#if EV_USE_MONOTONIC
		1173	if (expect_true (have_monotonic))
		1174	time_update_monotonic (EV_A);
		1175	else
		1176	#endif
		1177	{
		1178	ev_rt_now = ev_time ();
		1179	mn_now = ev_rt_now;
		1180	}
		1181
498	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1182	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
499	block = 0.;	1183	block = 0.;
500	else	1184	else
501	{	1185	{
502	block = MAX_BLOCKTIME;	1186	block = MAX_BLOCKTIME;
503		1187
504	if (rtimercnt)	1188	if (timercnt)
505	{	1189	{
506	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1190	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
507	if (block > to) block = to;	1191	if (block > to) block = to;
508	}	1192	}
509		1193
		1194	#if EV_PERIODICS
510	if (atimercnt)	1195	if (periodiccnt)
511	{	1196	{
512	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1197	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge;
513	if (block > to) block = to;	1198	if (block > to) block = to;
514	}	1199	}
		1200	#endif
515		1201
516	if (block < 0.) block = 0.;	1202	if (block < 0.) block = 0.;
517	}	1203	}
518		1204
519	method_poll (block);	1205	method_poll (EV_A_ block);
520		1206
521	/* update ev_now, do magic */	1207	/* update ev_rt_now, do magic */
522	time_update ();	1208	time_update (EV_A);
523		1209
524	/* queue pending timers and reschedule them */	1210	/* queue pending timers and reschedule them */
525	/* absolute timers first */	1211	timers_reify (EV_A); /* relative timers called last */
526	timers_reify (atimers, atimercnt, ev_now);	1212	#if EV_PERIODICS
527	/* relative timers second */	1213	periodics_reify (EV_A); /* absolute timers called first */
528	timers_reify (rtimers, rtimercnt, now);	1214	#endif
529		1215
530	/* queue idle watchers unless io or timers are pending */	1216	/* queue idle watchers unless io or timers are pending */
531	if (!pendingcnt)	1217	if (idlecnt && !any_pending (EV_A))
532	queue_events ((W *)idles, idlecnt, EV_IDLE);	1218	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
533		1219
534	/* queue check and possibly idle watchers */	1220	/* queue check watchers, to be executed first */
		1221	if (checkcnt)
535	queue_events ((W *)checks, checkcnt, EV_CHECK);	1222	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
536		1223
537	call_pending ();	1224	call_pending (EV_A);
538	}	1225	}
539	while (!ev_loop_done);	1226	while (activecnt && !loop_done);
		1227
		1228	if (loop_done != 2)
		1229	loop_done = 0;
		1230	}
		1231
		1232	void
		1233	ev_unloop (EV_P_ int how)
		1234	{
		1235	loop_done = how;
540	}	1236	}
541		1237
542	/*****************************************************************************/	1238	/*****************************************************************************/
543		1239
544	static void	1240	inline void
545	wlist_add (WL *head, WL elem)	1241	wlist_add (WL *head, WL elem)
546	{	1242	{
547	elem->next = *head;	1243	elem->next = *head;
548	*head = elem;	1244	*head = elem;
549	}	1245	}
550		1246
551	static void	1247	inline void
552	wlist_del (WL *head, WL elem)	1248	wlist_del (WL *head, WL elem)
553	{	1249	{
554	while (*head)	1250	while (*head)
555	{	1251	{
556	if (*head == elem)	1252	if (*head == elem)
561		1257
562	head = &(*head)->next;	1258	head = &(*head)->next;
563	}	1259	}
564	}	1260	}
565		1261
566	static void	1262	inline void
		1263	ev_clear_pending (EV_P_ W w)
		1264	{
		1265	if (w->pending)
		1266	{
		1267	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1268	w->pending = 0;
		1269	}
		1270	}
		1271
		1272	inline void
567	ev_start (W w, int active)	1273	ev_start (EV_P_ W w, int active)
568	{	1274	{
569	w->pending = 0;	1275	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1276	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1277
570	w->active = active;	1278	w->active = active;
		1279	ev_ref (EV_A);
571	}	1280	}
572		1281
573	static void	1282	inline void
574	ev_stop (W w)	1283	ev_stop (EV_P_ W w)
575	{	1284	{
576	if (w->pending)	1285	ev_unref (EV_A);
577	pendings [w->pending - 1].w = 0;
578
579	w->active = 0;	1286	w->active = 0;
580	}	1287	}
581		1288
582	/*****************************************************************************/	1289	/*****************************************************************************/
583		1290
584	void	1291	void
585	evio_start (struct ev_io *w)	1292	ev_io_start (EV_P_ struct ev_io *w)
586	{	1293	{
		1294	int fd = w->fd;
		1295
587	if (ev_is_active (w))	1296	if (ev_is_active (w))
588	return;	1297	return;
589		1298
590	int fd = w->fd;	1299	assert (("ev_io_start called with negative fd", fd >= 0));
591		1300
592	ev_start ((W)w, 1);	1301	ev_start (EV_A_ (W)w, 1);
593	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1302	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
594	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1303	wlist_add ((WL *)&anfds[fd].head, (WL)w);
595		1304
596	++fdchangecnt;	1305	fd_change (EV_A_ fd);
597	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
598	fdchanges [fdchangecnt - 1] = fd;
599	}	1306	}
600		1307
601	void	1308	void
602	evio_stop (struct ev_io *w)	1309	ev_io_stop (EV_P_ struct ev_io *w)
603	{	1310	{
		1311	ev_clear_pending (EV_A_ (W)w);
604	if (!ev_is_active (w))	1312	if (!ev_is_active (w))
605	return;	1313	return;
606		1314
		1315	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1316
607	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1317	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
608	ev_stop ((W)w);	1318	ev_stop (EV_A_ (W)w);
609		1319
610	++fdchangecnt;	1320	fd_change (EV_A_ w->fd);
611	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
612	fdchanges [fdchangecnt - 1] = w->fd;
613	}	1321	}
614		1322
615	void	1323	void
616	evtimer_start (struct ev_timer *w)	1324	ev_timer_start (EV_P_ struct ev_timer *w)
617	{	1325	{
618	if (ev_is_active (w))	1326	if (ev_is_active (w))
619	return;	1327	return;
620		1328
621	if (w->is_abs)	1329	((WT)w)->at += mn_now;
		1330
		1331	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1332
		1333	ev_start (EV_A_ (W)w, ++timercnt);
		1334	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
		1335	timers [timercnt - 1] = w;
		1336	upheap ((WT *)timers, timercnt - 1);
		1337
		1338	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1339	}
		1340
		1341	void
		1342	ev_timer_stop (EV_P_ struct ev_timer *w)
		1343	{
		1344	ev_clear_pending (EV_A_ (W)w);
		1345	if (!ev_is_active (w))
		1346	return;
		1347
		1348	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1349
		1350	if (((W)w)->active < timercnt--)
		1351	{
		1352	timers [((W)w)->active - 1] = timers [timercnt];
		1353	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
622	{	1354	}
623	/* this formula differs from the one in timer_reify becuse we do not round up */	1355
		1356	((WT)w)->at -= mn_now;
		1357
		1358	ev_stop (EV_A_ (W)w);
		1359	}
		1360
		1361	void
		1362	ev_timer_again (EV_P_ struct ev_timer *w)
		1363	{
		1364	if (ev_is_active (w))
		1365	{
624	if (w->repeat)	1366	if (w->repeat)
625	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1367	{
626		1368	((WT)w)->at = mn_now + w->repeat;
627	ev_start ((W)w, ++atimercnt);	1369	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
628	array_needsize (atimers, atimermax, atimercnt, );	1370	}
629	atimers [atimercnt - 1] = w;
630	upheap (atimers, atimercnt - 1);
631	}
632	else	1371	else
		1372	ev_timer_stop (EV_A_ w);
633	{	1373	}
634	w->at += now;	1374	else if (w->repeat)
		1375	ev_timer_start (EV_A_ w);
		1376	}
635		1377
636	ev_start ((W)w, ++rtimercnt);	1378	#if EV_PERIODICS
637	array_needsize (rtimers, rtimermax, rtimercnt, );	1379	void
638	rtimers [rtimercnt - 1] = w;	1380	ev_periodic_start (EV_P_ struct ev_periodic *w)
639	upheap (rtimers, rtimercnt - 1);	1381	{
		1382	if (ev_is_active (w))
		1383	return;
		1384
		1385	if (w->reschedule_cb)
		1386	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1387	else if (w->interval)
640	}	1388	{
		1389	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1390	/* this formula differs from the one in periodic_reify because we do not always round up */
		1391	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1392	}
641		1393
642	}	1394	ev_start (EV_A_ (W)w, ++periodiccnt);
		1395	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
		1396	periodics [periodiccnt - 1] = w;
		1397	upheap ((WT *)periodics, periodiccnt - 1);
643		1398
		1399	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1400	}
		1401
644	void	1402	void
645	evtimer_stop (struct ev_timer *w)	1403	ev_periodic_stop (EV_P_ struct ev_periodic *w)
646	{	1404	{
		1405	ev_clear_pending (EV_A_ (W)w);
647	if (!ev_is_active (w))	1406	if (!ev_is_active (w))
648	return;	1407	return;
649		1408
650	if (w->is_abs)	1409	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
651	{	1410
652	if (w->active < atimercnt--)	1411	if (((W)w)->active < periodiccnt--)
653	{
654	atimers [w->active - 1] = atimers [atimercnt];
655	downheap (atimers, atimercnt, w->active - 1);
656	}
657	}	1412	{
658	else	1413	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1414	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
659	{	1415	}
660	if (w->active < rtimercnt--)
661	{
662	rtimers [w->active - 1] = rtimers [rtimercnt];
663	downheap (rtimers, rtimercnt, w->active - 1);
664	}
665	}
666		1416
667	ev_stop ((W)w);	1417	ev_stop (EV_A_ (W)w);
668	}	1418	}
669		1419
670	void	1420	void
671	evsignal_start (struct ev_signal *w)	1421	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1422	{
		1423	/* TODO: use adjustheap and recalculation */
		1424	ev_periodic_stop (EV_A_ w);
		1425	ev_periodic_start (EV_A_ w);
		1426	}
		1427	#endif
		1428
		1429	void
		1430	ev_idle_start (EV_P_ struct ev_idle *w)
672	{	1431	{
673	if (ev_is_active (w))	1432	if (ev_is_active (w))
674	return;	1433	return;
675		1434
		1435	ev_start (EV_A_ (W)w, ++idlecnt);
		1436	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1437	idles [idlecnt - 1] = w;
		1438	}
		1439
		1440	void
		1441	ev_idle_stop (EV_P_ struct ev_idle *w)
		1442	{
		1443	ev_clear_pending (EV_A_ (W)w);
		1444	if (!ev_is_active (w))
		1445	return;
		1446
		1447	idles [((W)w)->active - 1] = idles [--idlecnt];
		1448	ev_stop (EV_A_ (W)w);
		1449	}
		1450
		1451	void
		1452	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1453	{
		1454	if (ev_is_active (w))
		1455	return;
		1456
		1457	ev_start (EV_A_ (W)w, ++preparecnt);
		1458	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1459	prepares [preparecnt - 1] = w;
		1460	}
		1461
		1462	void
		1463	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1464	{
		1465	ev_clear_pending (EV_A_ (W)w);
		1466	if (!ev_is_active (w))
		1467	return;
		1468
		1469	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1470	ev_stop (EV_A_ (W)w);
		1471	}
		1472
		1473	void
		1474	ev_check_start (EV_P_ struct ev_check *w)
		1475	{
		1476	if (ev_is_active (w))
		1477	return;
		1478
		1479	ev_start (EV_A_ (W)w, ++checkcnt);
		1480	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1481	checks [checkcnt - 1] = w;
		1482	}
		1483
		1484	void
		1485	ev_check_stop (EV_P_ struct ev_check *w)
		1486	{
		1487	ev_clear_pending (EV_A_ (W)w);
		1488	if (!ev_is_active (w))
		1489	return;
		1490
		1491	checks [((W)w)->active - 1] = checks [--checkcnt];
		1492	ev_stop (EV_A_ (W)w);
		1493	}
		1494
		1495	#ifndef SA_RESTART
		1496	# define SA_RESTART 0
		1497	#endif
		1498
		1499	void
		1500	ev_signal_start (EV_P_ struct ev_signal *w)
		1501	{
		1502	#if EV_MULTIPLICITY
		1503	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1504	#endif
		1505	if (ev_is_active (w))
		1506	return;
		1507
		1508	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1509
676	ev_start ((W)w, 1);	1510	ev_start (EV_A_ (W)w, 1);
677	array_needsize (signals, signalmax, w->signum, signals_init);	1511	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
678	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1512	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
679		1513
680	if (!w->next)	1514	if (!((WL)w)->next)
681	{	1515	{
		1516	#if WIN32
		1517	signal (w->signum, sighandler);
		1518	#else
682	struct sigaction sa;	1519	struct sigaction sa;
683	sa.sa_handler = sighandler;	1520	sa.sa_handler = sighandler;
684	sigfillset (&sa.sa_mask);	1521	sigfillset (&sa.sa_mask);
685	sa.sa_flags = 0;	1522	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
686	sigaction (w->signum, &sa, 0);	1523	sigaction (w->signum, &sa, 0);
		1524	#endif
687	}	1525	}
688	}	1526	}
689		1527
690	void	1528	void
691	evsignal_stop (struct ev_signal *w)	1529	ev_signal_stop (EV_P_ struct ev_signal *w)
692	{	1530	{
		1531	ev_clear_pending (EV_A_ (W)w);
693	if (!ev_is_active (w))	1532	if (!ev_is_active (w))
694	return;	1533	return;
695		1534
696	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1535	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
697	ev_stop ((W)w);	1536	ev_stop (EV_A_ (W)w);
698		1537
699	if (!signals [w->signum - 1].head)	1538	if (!signals [w->signum - 1].head)
700	signal (w->signum, SIG_DFL);	1539	signal (w->signum, SIG_DFL);
701	}	1540	}
702		1541
703	void evidle_start (struct ev_idle *w)	1542	void
		1543	ev_child_start (EV_P_ struct ev_child *w)
704	{	1544	{
		1545	#if EV_MULTIPLICITY
		1546	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1547	#endif
705	if (ev_is_active (w))	1548	if (ev_is_active (w))
706	return;	1549	return;
707		1550
708	ev_start ((W)w, ++idlecnt);	1551	ev_start (EV_A_ (W)w, 1);
709	array_needsize (idles, idlemax, idlecnt, );	1552	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
710	idles [idlecnt - 1] = w;
711	}	1553	}
712		1554
713	void evidle_stop (struct ev_idle *w)	1555	void
		1556	ev_child_stop (EV_P_ struct ev_child *w)
714	{	1557	{
715	idles [w->active - 1] = idles [--idlecnt];	1558	ev_clear_pending (EV_A_ (W)w);
716	ev_stop ((W)w);
717	}
718
719	void evcheck_start (struct ev_check *w)
720	{
721	if (ev_is_active (w))	1559	if (!ev_is_active (w))
722	return;	1560	return;
723		1561
724	ev_start ((W)w, ++checkcnt);	1562	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
725	array_needsize (checks, checkmax, checkcnt, );
726	checks [checkcnt - 1] = w;
727	}
728
729	void evcheck_stop (struct ev_check *w)
730	{
731	checks [w->active - 1] = checks [--checkcnt];
732	ev_stop ((W)w);	1563	ev_stop (EV_A_ (W)w);
733	}	1564	}
734		1565
735	/*****************************************************************************/	1566	/*****************************************************************************/
736		1567
737	#if 0	1568	struct ev_once
738
739	static void
740	sin_cb (struct ev_io *w, int revents)
741	{	1569	{
742	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
743	}
744
745	static void
746	ocb (struct ev_timer *w, int revents)
747	{
748	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
749	evtimer_stop (w);
750	evtimer_start (w);
751	}
752
753	static void
754	scb (struct ev_signal *w, int revents)
755	{
756	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
757	}
758
759	static void
760	gcb (struct ev_signal *w, int revents)
761	{
762	fprintf (stderr, "generic %x\n", revents);
763	}
764
765	int main (void)
766	{
767	struct ev_io sin;	1570	struct ev_io io;
768
769	ev_init (0);
770
771	evw_init (&sin, sin_cb, 55);
772	evio_set (&sin, 0, EV_READ);
773	evio_start (&sin);
774
775	struct ev_timer t[10000];
776
777	#if 0
778	int i;
779	for (i = 0; i < 10000; ++i)
780	{
781	struct ev_timer *w = t + i;
782	evw_init (w, ocb, i);
783	evtimer_set_abs (w, drand48 (), 0.99775533);
784	evtimer_start (w);
785	if (drand48 () < 0.5)
786	evtimer_stop (w);
787	}
788	#endif
789
790	struct ev_timer t1;	1571	struct ev_timer to;
791	evw_init (&t1, ocb, 0);	1572	void (cb)(int revents, void arg);
792	evtimer_set_abs (&t1, 5, 10);	1573	void *arg;
793	evtimer_start (&t1);	1574	};
794		1575
795	struct ev_signal sig;	1576	static void
796	evw_init (&sig, scb, 65535);	1577	once_cb (EV_P_ struct ev_once *once, int revents)
797	evsignal_set (&sig, SIGQUIT);	1578	{
798	evsignal_start (&sig);	1579	void (cb)(int revents, void arg) = once->cb;
		1580	void *arg = once->arg;
799		1581
800	struct ev_check cw;	1582	ev_io_stop (EV_A_ &once->io);
801	evw_init (&cw, gcb, 0);	1583	ev_timer_stop (EV_A_ &once->to);
802	evcheck_start (&cw);	1584	ev_free (once);
803		1585
804	struct ev_idle iw;	1586	cb (revents, arg);
805	evw_init (&iw, gcb, 0);
806	evidle_start (&iw);
807
808	ev_loop (0);
809
810	return 0;
811	}	1587	}
812		1588
813	#endif	1589	static void
		1590	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1591	{
		1592	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1593	}
814		1594
		1595	static void
		1596	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1597	{
		1598	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1599	}
815		1600
		1601	void
		1602	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1603	{
		1604	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
816		1605
		1606	if (!once)
		1607	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1608	else
		1609	{
		1610	once->cb = cb;
		1611	once->arg = arg;
817		1612
		1613	ev_init (&once->io, once_cb_io);
		1614	if (fd >= 0)
		1615	{
		1616	ev_io_set (&once->io, fd, events);
		1617	ev_io_start (EV_A_ &once->io);
		1618	}
		1619
		1620	ev_init (&once->to, once_cb_to);
		1621	if (timeout >= 0.)
		1622	{
		1623	ev_timer_set (&once->to, timeout, 0.);
		1624	ev_timer_start (EV_A_ &once->to);
		1625	}
		1626	}
		1627	}
		1628
		1629	#ifdef __cplusplus
		1630	}
		1631	#endif
		1632

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Comparing libev/ev.c (file contents): Revision 1.11 by root, Wed Oct 31 07:40:49 2007 UTC vs. Revision 1.101 by root, Sun Nov 11 04:04:23 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.11 by root, Wed Oct 31 07:40:49 2007 UTC vs.
Revision 1.101 by root, Sun Nov 11 04:04:23 2007 UTC