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

Comparing libev/ev.c (file contents):
Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC vs.
Revision 1.77 by root, Thu Nov 8 00:44:17 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>
6	#include <stddef.h>	60	#include <stddef.h>
7		61
8	#include <stdio.h>	62	#include <stdio.h>
9		63
10	#include <assert.h>	64	#include <assert.h>
11	#include <errno.h>	65	#include <errno.h>
12	#include <sys/time.h>	66	#include <sys/types.h>
13	#include <time.h>	67	#include <time.h>
14		68
15	#define HAVE_EPOLL 1	69	#include <signal.h>
16		70
		71	#ifndef WIN32
		72	# include <unistd.h>
		73	# include <sys/time.h>
		74	# include <sys/wait.h>
		75	#endif
		76	/**/
		77
17	#ifndef HAVE_MONOTONIC	78	#ifndef EV_USE_MONOTONIC
18	# ifdef CLOCK_MONOTONIC
19	# 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
20	# endif	105	# endif
21	#endif	106	#endif
22		107
23	#ifndef HAVE_SELECT
24	# define HAVE_SELECT 1
25	#endif
26
27	#ifndef HAVE_EPOLL
28	# define HAVE_EPOLL 0
29	#endif
30
31	#ifndef HAVE_REALTIME	108	#ifndef EV_USE_REALTIME
32	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	109	# define EV_USE_REALTIME 1
33	#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	/**/
34		125
35	#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) */
36	#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 */
37		130
38	#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)
39		146
40	typedef struct ev_watcher *W;	147	typedef struct ev_watcher *W;
41	typedef struct ev_watcher_list *WL;	148	typedef struct ev_watcher_list *WL;
42	typedef struct ev_watcher_time *WT;	149	typedef struct ev_watcher_time *WT;
43		150
44	static ev_tstamp now, diff; /* monotonic clock */	151	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
45	ev_tstamp ev_now;
46	int ev_method;
47		152
48	static int have_monotonic; /* runtime */	153	#include "ev_win32.c"
49
50	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
51	static void (*method_modify)(int fd, int oev, int nev);
52	static void (*method_poll)(ev_tstamp timeout);
53		154
54	/*****************************************************************************/	155	/*****************************************************************************/
55		156
56	ev_tstamp	157	static void (syserr_cb)(const char msg);
		158
		159	void ev_set_syserr_cb (void (cb)(const char msg))
		160	{
		161	syserr_cb = cb;
		162	}
		163
		164	static void
		165	syserr (const char *msg)
		166	{
		167	if (!msg)
		168	msg = "(libev) system error";
		169
		170	if (syserr_cb)
		171	syserr_cb (msg);
		172	else
		173	{
		174	perror (msg);
		175	abort ();
		176	}
		177	}
		178
		179	static void (alloc)(void *ptr, long size);
		180
		181	void ev_set_allocator (void (cb)(void *ptr, long size))
		182	{
		183	alloc = cb;
		184	}
		185
		186	static void *
		187	ev_realloc (void *ptr, long size)
		188	{
		189	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		190
		191	if (!ptr && size)
		192	{
		193	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		194	abort ();
		195	}
		196
		197	return ptr;
		198	}
		199
		200	#define ev_malloc(size) ev_realloc (0, (size))
		201	#define ev_free(ptr) ev_realloc ((ptr), 0)
		202
		203	/*****************************************************************************/
		204
		205	typedef struct
		206	{
		207	WL head;
		208	unsigned char events;
		209	unsigned char reify;
		210	} ANFD;
		211
		212	typedef struct
		213	{
		214	W w;
		215	int events;
		216	} ANPENDING;
		217
		218	#if EV_MULTIPLICITY
		219
		220	struct ev_loop
		221	{
		222	# define VAR(name,decl) decl;
		223	# include "ev_vars.h"
		224	};
		225	# undef VAR
		226	# include "ev_wrap.h"
		227
		228	#else
		229
		230	# define VAR(name,decl) static decl;
		231	# include "ev_vars.h"
		232	# undef VAR
		233
		234	#endif
		235
		236	/*****************************************************************************/
		237
		238	inline ev_tstamp
57	ev_time (void)	239	ev_time (void)
58	{	240	{
59	#if HAVE_REALTIME	241	#if EV_USE_REALTIME
60	struct timespec ts;	242	struct timespec ts;
61	clock_gettime (CLOCK_REALTIME, &ts);	243	clock_gettime (CLOCK_REALTIME, &ts);
62	return ts.tv_sec + ts.tv_nsec * 1e-9;	244	return ts.tv_sec + ts.tv_nsec * 1e-9;
63	#else	245	#else
64	struct timeval tv;	246	struct timeval tv;
65	gettimeofday (&tv, 0);	247	gettimeofday (&tv, 0);
66	return tv.tv_sec + tv.tv_usec * 1e-6;	248	return tv.tv_sec + tv.tv_usec * 1e-6;
67	#endif	249	#endif
68	}	250	}
69		251
70	static ev_tstamp	252	inline ev_tstamp
71	get_clock (void)	253	get_clock (void)
72	{	254	{
73	#if HAVE_MONOTONIC	255	#if EV_USE_MONOTONIC
74	if (have_monotonic)	256	if (expect_true (have_monotonic))
75	{	257	{
76	struct timespec ts;	258	struct timespec ts;
77	clock_gettime (CLOCK_MONOTONIC, &ts);	259	clock_gettime (CLOCK_MONOTONIC, &ts);
78	return ts.tv_sec + ts.tv_nsec * 1e-9;	260	return ts.tv_sec + ts.tv_nsec * 1e-9;
79	}	261	}
80	#endif	262	#endif
81		263
82	return ev_time ();	264	return ev_time ();
83	}	265	}
84		266
		267	ev_tstamp
		268	ev_now (EV_P)
		269	{
		270	return rt_now;
		271	}
		272
		273	#define array_roundsize(type,n) ((n) \| 4 & ~3)
		274
85	#define array_needsize(base,cur,cnt,init) \	275	#define array_needsize(type,base,cur,cnt,init) \
86	if ((cnt) > cur) \	276	if (expect_false ((cnt) > cur)) \
87	{ \	277	{ \
88	int newcnt = cur ? cur << 1 : 16; \	278	int newcnt = cur; \
		279	do \
		280	{ \
		281	newcnt = array_roundsize (type, newcnt << 1); \
		282	} \
		283	while ((cnt) > newcnt); \
		284	\
89	base = realloc (base, sizeof (base) (newcnt)); \	285	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
90	init (base + cur, newcnt - cur); \	286	init (base + cur, newcnt - cur); \
91	cur = newcnt; \	287	cur = newcnt; \
92	}	288	}
		289
		290	#define array_slim(type,stem) \
		291	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		292	{ \
		293	stem ## max = array_roundsize (stem ## cnt >> 1); \
		294	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
		295	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		296	}
		297
		298	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		299	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		300	#define array_free_microshit(stem) \
		301	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		302
		303	#define array_free(stem, idx) \
		304	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
93		305
94	/*****************************************************************************/	306	/*****************************************************************************/
95		307
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	308	static void
109	anfds_init (ANFD *base, int count)	309	anfds_init (ANFD *base, int count)
110	{	310	{
111	while (count--)	311	while (count--)
112	{	312	{
113	base->head = 0;	313	base->head = 0;
114	base->wev = base->rev = EV_NONE;	314	base->events = EV_NONE;
		315	base->reify = 0;
		316
115	++base;	317	++base;
116	}	318	}
117	}	319	}
118		320
119	typedef struct
120	{
121	W w;
122	int events;
123	} ANPENDING;
124
125	static ANPENDING *pendings;
126	static int pendingmax, pendingcnt;
127
128	static void	321	static void
129	event (W w, int events)	322	event (EV_P_ W w, int events)
130	{	323	{
131	if (w->active)	324	if (w->pending)
132	{	325	{
133	w->pending = ++pendingcnt;
134	array_needsize (pendings, pendingmax, pendingcnt, );
135	pendings [pendingcnt - 1].w = w;
136	pendings [pendingcnt - 1].events = events;	326	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		327	return;
137	}	328	}
138	}
139		329
		330	w->pending = ++pendingcnt [ABSPRI (w)];
		331	array_needsize (ANPENDING, pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
		332	pendings [ABSPRI (w)][w->pending - 1].w = w;
		333	pendings [ABSPRI (w)][w->pending - 1].events = events;
		334	}
		335
140	static void	336	static void
		337	queue_events (EV_P_ W *events, int eventcnt, int type)
		338	{
		339	int i;
		340
		341	for (i = 0; i < eventcnt; ++i)
		342	event (EV_A_ events [i], type);
		343	}
		344
		345	static void
141	fd_event (int fd, int events)	346	fd_event (EV_P_ int fd, int events)
142	{	347	{
143	ANFD *anfd = anfds + fd;	348	ANFD *anfd = anfds + fd;
144	struct ev_io *w;	349	struct ev_io *w;
145		350
146	for (w = anfd->head; w; w = w->next)	351	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
147	{	352	{
148	int ev = w->events & events;	353	int ev = w->events & events;
149		354
150	if (ev)	355	if (ev)
151	event ((W)w, ev);	356	event (EV_A_ (W)w, ev);
152	}	357	}
153	}	358	}
154		359
		360	/*****************************************************************************/
		361
155	static void	362	static void
156	queue_events (W *events, int eventcnt, int type)	363	fd_reify (EV_P)
157	{	364	{
158	int i;	365	int i;
159		366
160	for (i = 0; i < eventcnt; ++i)	367	for (i = 0; i < fdchangecnt; ++i)
161	event (events [i], type);	368	{
		369	int fd = fdchanges [i];
		370	ANFD *anfd = anfds + fd;
		371	struct ev_io *w;
		372
		373	int events = 0;
		374
		375	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		376	events \|= w->events;
		377
		378	anfd->reify = 0;
		379
		380	method_modify (EV_A_ fd, anfd->events, events);
		381	anfd->events = events;
		382	}
		383
		384	fdchangecnt = 0;
		385	}
		386
		387	static void
		388	fd_change (EV_P_ int fd)
		389	{
		390	if (anfds [fd].reify)
		391	return;
		392
		393	anfds [fd].reify = 1;
		394
		395	++fdchangecnt;
		396	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		397	fdchanges [fdchangecnt - 1] = fd;
		398	}
		399
		400	static void
		401	fd_kill (EV_P_ int fd)
		402	{
		403	struct ev_io *w;
		404
		405	while ((w = (struct ev_io *)anfds [fd].head))
		406	{
		407	ev_io_stop (EV_A_ w);
		408	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		409	}
		410	}
		411
		412	static int
		413	fd_valid (int fd)
		414	{
		415	#ifdef WIN32
		416	return !!win32_get_osfhandle (fd);
		417	#else
		418	return fcntl (fd, F_GETFD) != -1;
		419	#endif
		420	}
		421
		422	/* called on EBADF to verify fds */
		423	static void
		424	fd_ebadf (EV_P)
		425	{
		426	int fd;
		427
		428	for (fd = 0; fd < anfdmax; ++fd)
		429	if (anfds [fd].events)
		430	if (!fd_valid (fd) == -1 && errno == EBADF)
		431	fd_kill (EV_A_ fd);
		432	}
		433
		434	/* called on ENOMEM in select/poll to kill some fds and retry */
		435	static void
		436	fd_enomem (EV_P)
		437	{
		438	int fd;
		439
		440	for (fd = anfdmax; fd--; )
		441	if (anfds [fd].events)
		442	{
		443	fd_kill (EV_A_ fd);
		444	return;
		445	}
		446	}
		447
		448	/* usually called after fork if method needs to re-arm all fds from scratch */
		449	static void
		450	fd_rearm_all (EV_P)
		451	{
		452	int fd;
		453
		454	/* this should be highly optimised to not do anything but set a flag */
		455	for (fd = 0; fd < anfdmax; ++fd)
		456	if (anfds [fd].events)
		457	{
		458	anfds [fd].events = 0;
		459	fd_change (EV_A_ fd);
		460	}
162	}	461	}
163		462
164	/*****************************************************************************/	463	/*****************************************************************************/
165		464
166	static struct ev_timer **timers;
167	static int timermax, timercnt;
168
169	static struct ev_periodic **periodics;
170	static int periodicmax, periodiccnt;
171
172	static void	465	static void
173	upheap (WT *timers, int k)	466	upheap (WT *heap, int k)
174	{	467	{
175	WT w = timers [k];	468	WT w = heap [k];
176		469
177	while (k && timers [k >> 1]->at > w->at)	470	while (k && heap [k >> 1]->at > w->at)
178	{	471	{
179	timers [k] = timers [k >> 1];	472	heap [k] = heap [k >> 1];
180	timers [k]->active = k + 1;	473	((W)heap [k])->active = k + 1;
181	k >>= 1;	474	k >>= 1;
182	}	475	}
183		476
184	timers [k] = w;	477	heap [k] = w;
185	timers [k]->active = k + 1;	478	((W)heap [k])->active = k + 1;
186		479
187	}	480	}
188		481
189	static void	482	static void
190	downheap (WT *timers, int N, int k)	483	downheap (WT *heap, int N, int k)
191	{	484	{
192	WT w = timers [k];	485	WT w = heap [k];
193		486
194	while (k < (N >> 1))	487	while (k < (N >> 1))
195	{	488	{
196	int j = k << 1;	489	int j = k << 1;
197		490
198	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	491	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
199	++j;	492	++j;
200		493
201	if (w->at <= timers [j]->at)	494	if (w->at <= heap [j]->at)
202	break;	495	break;
203		496
204	timers [k] = timers [j];	497	heap [k] = heap [j];
205	timers [k]->active = k + 1;	498	((W)heap [k])->active = k + 1;
206	k = j;	499	k = j;
207	}	500	}
208		501
209	timers [k] = w;	502	heap [k] = w;
210	timers [k]->active = k + 1;	503	((W)heap [k])->active = k + 1;
211	}	504	}
212		505
213	/*****************************************************************************/	506	/*****************************************************************************/
214		507
215	typedef struct	508	typedef struct
216	{	509	{
217	struct ev_signal *head;	510	WL head;
218	sig_atomic_t gotsig;	511	sig_atomic_t volatile gotsig;
219	} ANSIG;	512	} ANSIG;
220		513
221	static ANSIG *signals;	514	static ANSIG *signals;
222	static int signalmax;	515	static int signalmax;
223		516
224	static int sigpipe [2];	517	static int sigpipe [2];
225	static sig_atomic_t gotsig;	518	static sig_atomic_t volatile gotsig;
226	static struct ev_io sigev;	519	static struct ev_io sigev;
227		520
228	static void	521	static void
229	signals_init (ANSIG *base, int count)	522	signals_init (ANSIG *base, int count)
230	{	523	{
231	while (count--)	524	while (count--)
232	{	525	{
233	base->head = 0;	526	base->head = 0;
234	base->gotsig = 0;	527	base->gotsig = 0;
		528
235	++base;	529	++base;
236	}	530	}
237	}	531	}
238		532
239	static void	533	static void
240	sighandler (int signum)	534	sighandler (int signum)
241	{	535	{
		536	#if WIN32
		537	signal (signum, sighandler);
		538	#endif
		539
242	signals [signum - 1].gotsig = 1;	540	signals [signum - 1].gotsig = 1;
243		541
244	if (!gotsig)	542	if (!gotsig)
245	{	543	{
		544	int old_errno = errno;
246	gotsig = 1;	545	gotsig = 1;
		546	#ifdef WIN32
		547	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		548	#else
247	write (sigpipe [1], &gotsig, 1);	549	write (sigpipe [1], &signum, 1);
		550	#endif
		551	errno = old_errno;
248	}	552	}
249	}	553	}
250		554
251	static void	555	static void
252	sigcb (struct ev_io *iow, int revents)	556	sigcb (EV_P_ struct ev_io *iow, int revents)
253	{	557	{
254	struct ev_signal *w;	558	WL w;
255	int sig;	559	int signum;
256		560
		561	#ifdef WIN32
		562	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		563	#else
		564	read (sigpipe [0], &revents, 1);
		565	#endif
257	gotsig = 0;	566	gotsig = 0;
258	read (sigpipe [0], &revents, 1);
259		567
260	for (sig = signalmax; sig--; )	568	for (signum = signalmax; signum--; )
261	if (signals [sig].gotsig)	569	if (signals [signum].gotsig)
262	{	570	{
263	signals [sig].gotsig = 0;	571	signals [signum].gotsig = 0;
264		572
265	for (w = signals [sig].head; w; w = w->next)	573	for (w = signals [signum].head; w; w = w->next)
266	event ((W)w, EV_SIGNAL);	574	event (EV_A_ (W)w, EV_SIGNAL);
267	}	575	}
268	}	576	}
269		577
270	static void	578	static void
271	siginit (void)	579	siginit (EV_P)
272	{	580	{
		581	#ifndef WIN32
273	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	582	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
274	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	583	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
275		584
276	/* rather than sort out wether we really need nb, set it */	585	/* rather than sort out wether we really need nb, set it */
277	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	586	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
278	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	587	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		588	#endif
279		589
280	evio_set (&sigev, sigpipe [0], EV_READ);	590	ev_io_set (&sigev, sigpipe [0], EV_READ);
281	evio_start (&sigev);	591	ev_io_start (EV_A_ &sigev);
		592	ev_unref (EV_A); /* child watcher should not keep loop alive */
282	}	593	}
283		594
284	/*****************************************************************************/	595	/*****************************************************************************/
285		596
286	static struct ev_idle **idles;	597	static struct ev_child *childs [PID_HASHSIZE];
287	static int idlemax, idlecnt;
288		598
289	static struct ev_check **checks;	599	#ifndef WIN32
290	static int checkmax, checkcnt;	600
		601	static struct ev_signal childev;
		602
		603	#ifndef WCONTINUED
		604	# define WCONTINUED 0
		605	#endif
		606
		607	static void
		608	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		609	{
		610	struct ev_child *w;
		611
		612	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		613	if (w->pid == pid \|\| !w->pid)
		614	{
		615	ev_priority (w) = ev_priority (sw); /* need to do it now */
		616	w->rpid = pid;
		617	w->rstatus = status;
		618	event (EV_A_ (W)w, EV_CHILD);
		619	}
		620	}
		621
		622	static void
		623	childcb (EV_P_ struct ev_signal *sw, int revents)
		624	{
		625	int pid, status;
		626
		627	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		628	{
		629	/* make sure we are called again until all childs have been reaped */
		630	event (EV_A_ (W)sw, EV_SIGNAL);
		631
		632	child_reap (EV_A_ sw, pid, pid, status);
		633	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		634	}
		635	}
		636
		637	#endif
291		638
292	/*****************************************************************************/	639	/*****************************************************************************/
293		640
		641	#if EV_USE_KQUEUE
		642	# include "ev_kqueue.c"
		643	#endif
294	#if HAVE_EPOLL	644	#if EV_USE_EPOLL
295	# include "ev_epoll.c"	645	# include "ev_epoll.c"
296	#endif	646	#endif
		647	#if EV_USE_POLL
		648	# include "ev_poll.c"
		649	#endif
297	#if HAVE_SELECT	650	#if EV_USE_SELECT
298	# include "ev_select.c"	651	# include "ev_select.c"
299	#endif	652	#endif
300		653
301	int ev_init (int flags)	654	int
		655	ev_version_major (void)
302	{	656	{
		657	return EV_VERSION_MAJOR;
		658	}
		659
		660	int
		661	ev_version_minor (void)
		662	{
		663	return EV_VERSION_MINOR;
		664	}
		665
		666	/* return true if we are running with elevated privileges and should ignore env variables */
		667	static int
		668	enable_secure (void)
		669	{
		670	#ifdef WIN32
		671	return 0;
		672	#else
		673	return getuid () != geteuid ()
		674	\|\| getgid () != getegid ();
		675	#endif
		676	}
		677
		678	int
		679	ev_method (EV_P)
		680	{
		681	return method;
		682	}
		683
		684	static void
		685	loop_init (EV_P_ int methods)
		686	{
		687	if (!method)
		688	{
303	#if HAVE_MONOTONIC	689	#if EV_USE_MONOTONIC
304	{	690	{
305	struct timespec ts;	691	struct timespec ts;
306	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	692	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
307	have_monotonic = 1;	693	have_monotonic = 1;
308	}	694	}
309	#endif	695	#endif
310		696
311	ev_now = ev_time ();	697	rt_now = ev_time ();
312	now = get_clock ();	698	mn_now = get_clock ();
313	diff = ev_now - now;	699	now_floor = mn_now;
		700	rtmn_diff = rt_now - mn_now;
314		701
		702	if (methods == EVMETHOD_AUTO)
		703	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		704	methods = atoi (getenv ("LIBEV_METHODS"));
		705	else
		706	methods = EVMETHOD_ANY;
		707
		708	method = 0;
		709	#if EV_USE_WIN32
		710	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		711	#endif
		712	#if EV_USE_KQUEUE
		713	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		714	#endif
		715	#if EV_USE_EPOLL
		716	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		717	#endif
		718	#if EV_USE_POLL
		719	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		720	#endif
		721	#if EV_USE_SELECT
		722	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		723	#endif
		724
		725	ev_watcher_init (&sigev, sigcb);
		726	ev_set_priority (&sigev, EV_MAXPRI);
		727	}
		728	}
		729
		730	void
		731	loop_destroy (EV_P)
		732	{
		733	int i;
		734
		735	#if EV_USE_WIN32
		736	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		737	#endif
		738	#if EV_USE_KQUEUE
		739	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		740	#endif
		741	#if EV_USE_EPOLL
		742	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		743	#endif
		744	#if EV_USE_POLL
		745	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		746	#endif
		747	#if EV_USE_SELECT
		748	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		749	#endif
		750
		751	for (i = NUMPRI; i--; )
		752	array_free (pending, [i]);
		753
		754	/* have to use the microsoft-never-gets-it-right macro */
		755	array_free_microshit (fdchange);
		756	array_free_microshit (timer);
		757	array_free_microshit (periodic);
		758	array_free_microshit (idle);
		759	array_free_microshit (prepare);
		760	array_free_microshit (check);
		761
		762	method = 0;
		763	}
		764
		765	static void
		766	loop_fork (EV_P)
		767	{
		768	#if EV_USE_EPOLL
		769	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		770	#endif
		771	#if EV_USE_KQUEUE
		772	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		773	#endif
		774
		775	if (ev_is_active (&sigev))
		776	{
		777	/* default loop */
		778
		779	ev_ref (EV_A);
		780	ev_io_stop (EV_A_ &sigev);
		781	close (sigpipe [0]);
		782	close (sigpipe [1]);
		783
		784	while (pipe (sigpipe))
		785	syserr ("(libev) error creating pipe");
		786
		787	siginit (EV_A);
		788	}
		789
		790	postfork = 0;
		791	}
		792
		793	#if EV_MULTIPLICITY
		794	struct ev_loop *
		795	ev_loop_new (int methods)
		796	{
		797	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		798
		799	memset (loop, 0, sizeof (struct ev_loop));
		800
		801	loop_init (EV_A_ methods);
		802
		803	if (ev_method (EV_A))
		804	return loop;
		805
		806	return 0;
		807	}
		808
		809	void
		810	ev_loop_destroy (EV_P)
		811	{
		812	loop_destroy (EV_A);
		813	ev_free (loop);
		814	}
		815
		816	void
		817	ev_loop_fork (EV_P)
		818	{
		819	postfork = 1;
		820	}
		821
		822	#endif
		823
		824	#if EV_MULTIPLICITY
		825	struct ev_loop default_loop_struct;
		826	static struct ev_loop *default_loop;
		827
		828	struct ev_loop *
		829	#else
		830	static int default_loop;
		831
		832	int
		833	#endif
		834	ev_default_loop (int methods)
		835	{
		836	if (sigpipe [0] == sigpipe [1])
315	if (pipe (sigpipe))	837	if (pipe (sigpipe))
316	return 0;	838	return 0;
317		839
318	ev_method = EVMETHOD_NONE;	840	if (!default_loop)
319	#if HAVE_EPOLL	841	{
320	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	842	#if EV_MULTIPLICITY
		843	struct ev_loop *loop = default_loop = &default_loop_struct;
		844	#else
		845	default_loop = 1;
321	#endif	846	#endif
322	#if HAVE_SELECT
323	if (ev_method == EVMETHOD_NONE) select_init (flags);
324	#endif
325		847
		848	loop_init (EV_A_ methods);
		849
		850	if (ev_method (EV_A))
		851	{
		852	siginit (EV_A);
		853
		854	#ifndef WIN32
		855	ev_signal_init (&childev, childcb, SIGCHLD);
		856	ev_set_priority (&childev, EV_MAXPRI);
		857	ev_signal_start (EV_A_ &childev);
		858	ev_unref (EV_A); /* child watcher should not keep loop alive */
		859	#endif
		860	}
		861	else
		862	default_loop = 0;
		863	}
		864
		865	return default_loop;
		866	}
		867
		868	void
		869	ev_default_destroy (void)
		870	{
		871	#if EV_MULTIPLICITY
		872	struct ev_loop *loop = default_loop;
		873	#endif
		874
		875	#ifndef WIN32
		876	ev_ref (EV_A); /* child watcher */
		877	ev_signal_stop (EV_A_ &childev);
		878	#endif
		879
		880	ev_ref (EV_A); /* signal watcher */
		881	ev_io_stop (EV_A_ &sigev);
		882
		883	close (sigpipe [0]); sigpipe [0] = 0;
		884	close (sigpipe [1]); sigpipe [1] = 0;
		885
		886	loop_destroy (EV_A);
		887	}
		888
		889	void
		890	ev_default_fork (void)
		891	{
		892	#if EV_MULTIPLICITY
		893	struct ev_loop *loop = default_loop;
		894	#endif
		895
326	if (ev_method)	896	if (method)
327	{	897	postfork = 1;
328	evw_init (&sigev, sigcb);
329	siginit ();
330	}
331
332	return ev_method;
333	}	898	}
334		899
335	/*****************************************************************************/	900	/*****************************************************************************/
336		901
337	void ev_prefork (void)
338	{
339	/* nop */
340	}
341
342	void ev_postfork_parent (void)
343	{
344	/* nop */
345	}
346
347	void ev_postfork_child (void)
348	{
349	#if HAVE_EPOLL
350	if (ev_method == EVMETHOD_EPOLL)
351	epoll_postfork_child ();
352	#endif
353
354	evio_stop (&sigev);
355	close (sigpipe [0]);
356	close (sigpipe [1]);
357	pipe (sigpipe);
358	siginit ();
359	}
360
361	/*****************************************************************************/
362
363	static void	902	static int
364	fd_reify (void)	903	any_pending (EV_P)
365	{	904	{
366	int i;	905	int pri;
367		906
368	for (i = 0; i < fdchangecnt; ++i)	907	for (pri = NUMPRI; pri--; )
369	{	908	if (pendingcnt [pri])
370	int fd = fdchanges [i];	909	return 1;
371	ANFD *anfd = anfds + fd;
372	struct ev_io *w;
373		910
374	int wev = 0;	911	return 0;
375
376	for (w = anfd->head; w; w = w->next)
377	wev \|= w->events;
378
379	if (anfd->wev != wev)
380	{
381	method_modify (fd, anfd->wev, wev);
382	anfd->wev = wev;
383	}
384	}
385
386	fdchangecnt = 0;
387	}	912	}
388		913
389	static void	914	static void
390	call_pending ()	915	call_pending (EV_P)
391	{	916	{
392	int i;	917	int pri;
393		918
394	for (i = 0; i < pendingcnt; ++i)	919	for (pri = NUMPRI; pri--; )
		920	while (pendingcnt [pri])
395	{	921	{
396	ANPENDING *p = pendings + i;	922	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
397		923
398	if (p->w)	924	if (p->w)
399	{	925	{
400	p->w->pending = 0;	926	p->w->pending = 0;
401	p->w->cb (p->w, p->events);	927	p->w->cb (EV_A_ p->w, p->events);
402	}	928	}
403	}	929	}
404
405	pendingcnt = 0;
406	}	930	}
407		931
408	static void	932	static void
409	timers_reify ()	933	timers_reify (EV_P)
410	{	934	{
411	while (timercnt && timers [0]->at <= now)	935	while (timercnt && ((WT)timers [0])->at <= mn_now)
412	{	936	{
413	struct ev_timer *w = timers [0];	937	struct ev_timer *w = timers [0];
414		938
415	event ((W)w, EV_TIMEOUT);	939	assert (("inactive timer on timer heap detected", ev_is_active (w)));
416		940
417	/* first reschedule or stop timer */	941	/* first reschedule or stop timer */
418	if (w->repeat)	942	if (w->repeat)
419	{	943	{
		944	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
420	w->at = now + w->repeat;	945	((WT)w)->at = mn_now + w->repeat;
421	assert (("timer timeout in the past, negative repeat?", w->at > now));
422	downheap ((WT *)timers, timercnt, 0);	946	downheap ((WT *)timers, timercnt, 0);
423	}	947	}
424	else	948	else
425	evtimer_stop (w); /* nonrepeating: stop timer */	949	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
426	}
427	}
428		950
		951	event (EV_A_ (W)w, EV_TIMEOUT);
		952	}
		953	}
		954
429	static void	955	static void
430	periodics_reify ()	956	periodics_reify (EV_P)
431	{	957	{
432	while (periodiccnt && periodics [0]->at <= ev_now)	958	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
433	{	959	{
434	struct ev_periodic *w = periodics [0];	960	struct ev_periodic *w = periodics [0];
435		961
		962	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		963
436	/* first reschedule or stop timer */	964	/* first reschedule or stop timer */
437	if (w->interval)	965	if (w->reschedule_cb)
438	{	966	{
		967	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001);
		968
		969	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));
		970	downheap ((WT *)periodics, periodiccnt, 0);
		971	}
		972	else if (w->interval)
		973	{
439	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	974	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
440	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	975	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
441	downheap ((WT *)periodics, periodiccnt, 0);	976	downheap ((WT *)periodics, periodiccnt, 0);
442	}	977	}
443	else	978	else
444	evperiodic_stop (w); /* nonrepeating: stop timer */	979	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
445		980
446	event ((W)w, EV_TIMEOUT);	981	event (EV_A_ (W)w, EV_PERIODIC);
447	}	982	}
448	}	983	}
449		984
450	static void	985	static void
451	periodics_reschedule (ev_tstamp diff)	986	periodics_reschedule (EV_P)
452	{	987	{
453	int i;	988	int i;
454		989
455	/* adjust periodics after time jump */	990	/* adjust periodics after time jump */
456	for (i = 0; i < periodiccnt; ++i)	991	for (i = 0; i < periodiccnt; ++i)
457	{	992	{
458	struct ev_periodic *w = periodics [i];	993	struct ev_periodic *w = periodics [i];
459		994
		995	if (w->reschedule_cb)
		996	((WT)w)->at = w->reschedule_cb (w, rt_now);
460	if (w->interval)	997	else if (w->interval)
		998	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		999	}
		1000
		1001	/* now rebuild the heap */
		1002	for (i = periodiccnt >> 1; i--; )
		1003	downheap ((WT *)periodics, periodiccnt, i);
		1004	}
		1005
		1006	inline int
		1007	time_update_monotonic (EV_P)
		1008	{
		1009	mn_now = get_clock ();
		1010
		1011	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1012	{
		1013	rt_now = rtmn_diff + mn_now;
		1014	return 0;
		1015	}
		1016	else
		1017	{
		1018	now_floor = mn_now;
		1019	rt_now = ev_time ();
		1020	return 1;
		1021	}
		1022	}
		1023
		1024	static void
		1025	time_update (EV_P)
		1026	{
		1027	int i;
		1028
		1029	#if EV_USE_MONOTONIC
		1030	if (expect_true (have_monotonic))
		1031	{
		1032	if (time_update_monotonic (EV_A))
461	{	1033	{
462	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1034	ev_tstamp odiff = rtmn_diff;
463		1035
464	if (fabs (diff) >= 1e-4)	1036	for (i = 4; --i; ) /* loop a few times, before making important decisions */
465	{	1037	{
466	evperiodic_stop (w);	1038	rtmn_diff = rt_now - mn_now;
467	evperiodic_start (w);
468		1039
469	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1040	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1041	return; /* all is well */
		1042
		1043	rt_now = ev_time ();
		1044	mn_now = get_clock ();
		1045	now_floor = mn_now;
470	}	1046	}
		1047
		1048	periodics_reschedule (EV_A);
		1049	/* no timer adjustment, as the monotonic clock doesn't jump */
		1050	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
471	}	1051	}
472	}	1052	}
473	}	1053	else
474		1054	#endif
475	static void	1055	{
476	time_update ()
477	{
478	int i;
479
480	ev_now = ev_time ();	1056	rt_now = ev_time ();
481		1057
482	if (have_monotonic)	1058	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
483	{
484	ev_tstamp odiff = diff;
485
486	for (i = 4; --i; ) /* loop a few times, before making important decisions */
487	{	1059	{
488	now = get_clock ();
489	diff = ev_now - now;
490
491	if (fabs (odiff - diff) < MIN_TIMEJUMP)
492	return; /* all is well */
493
494	ev_now = ev_time ();
495	}
496
497	periodics_reschedule (diff - odiff);
498	/* no timer adjustment, as the monotonic clock doesn't jump */
499	}
500	else
501	{
502	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
503	{
504	periodics_reschedule (ev_now - now);	1060	periodics_reschedule (EV_A);
505		1061
506	/* adjust timers. this is easy, as the offset is the same for all */	1062	/* adjust timers. this is easy, as the offset is the same for all */
507	for (i = 0; i < timercnt; ++i)	1063	for (i = 0; i < timercnt; ++i)
508	timers [i]->at += diff;	1064	((WT)timers [i])->at += rt_now - mn_now;
509	}	1065	}
510		1066
511	now = ev_now;	1067	mn_now = rt_now;
512	}	1068	}
513	}	1069	}
514		1070
515	int ev_loop_done;	1071	void
		1072	ev_ref (EV_P)
		1073	{
		1074	++activecnt;
		1075	}
516		1076
		1077	void
		1078	ev_unref (EV_P)
		1079	{
		1080	--activecnt;
		1081	}
		1082
		1083	static int loop_done;
		1084
		1085	void
517	void ev_loop (int flags)	1086	ev_loop (EV_P_ int flags)
518	{	1087	{
519	double block;	1088	double block;
520	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1089	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
521
522	if (checkcnt)
523	{
524	queue_events ((W *)checks, checkcnt, EV_CHECK);
525	call_pending ();
526	}
527		1090
528	do	1091	do
529	{	1092	{
		1093	/* queue check watchers (and execute them) */
		1094	if (expect_false (preparecnt))
		1095	{
		1096	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1097	call_pending (EV_A);
		1098	}
		1099
		1100	/* we might have forked, so reify kernel state if necessary */
		1101	if (expect_false (postfork))
		1102	loop_fork (EV_A);
		1103
530	/* update fd-related kernel structures */	1104	/* update fd-related kernel structures */
531	fd_reify ();	1105	fd_reify (EV_A);
532		1106
533	/* calculate blocking time */	1107	/* calculate blocking time */
534		1108
535	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1109	/* we only need this for !monotonic clock or timers, but as we basically
		1110	always have timers, we just calculate it always */
		1111	#if EV_USE_MONOTONIC
		1112	if (expect_true (have_monotonic))
		1113	time_update_monotonic (EV_A);
		1114	else
		1115	#endif
		1116	{
536	ev_now = ev_time ();	1117	rt_now = ev_time ();
		1118	mn_now = rt_now;
		1119	}
537		1120
538	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1121	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
539	block = 0.;	1122	block = 0.;
540	else	1123	else
541	{	1124	{
542	block = MAX_BLOCKTIME;	1125	block = MAX_BLOCKTIME;
543		1126
544	if (timercnt)	1127	if (timercnt)
545	{	1128	{
546	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1129	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
547	if (block > to) block = to;	1130	if (block > to) block = to;
548	}	1131	}
549		1132
550	if (periodiccnt)	1133	if (periodiccnt)
551	{	1134	{
552	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1135	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
553	if (block > to) block = to;	1136	if (block > to) block = to;
554	}	1137	}
555		1138
556	if (block < 0.) block = 0.;	1139	if (block < 0.) block = 0.;
557	}	1140	}
558		1141
559	method_poll (block);	1142	method_poll (EV_A_ block);
560		1143
561	/* update ev_now, do magic */	1144	/* update rt_now, do magic */
562	time_update ();	1145	time_update (EV_A);
563		1146
564	/* queue pending timers and reschedule them */	1147	/* queue pending timers and reschedule them */
		1148	timers_reify (EV_A); /* relative timers called last */
565	periodics_reify (); /* absolute timers first */	1149	periodics_reify (EV_A); /* absolute timers called first */
566	timers_reify (); /* relative timers second */
567		1150
568	/* queue idle watchers unless io or timers are pending */	1151	/* queue idle watchers unless io or timers are pending */
569	if (!pendingcnt)	1152	if (idlecnt && !any_pending (EV_A))
570	queue_events ((W *)idles, idlecnt, EV_IDLE);	1153	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
571		1154
572	/* queue check and possibly idle watchers */	1155	/* queue check watchers, to be executed first */
		1156	if (checkcnt)
573	queue_events ((W *)checks, checkcnt, EV_CHECK);	1157	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
574		1158
575	call_pending ();	1159	call_pending (EV_A);
576	}	1160	}
577	while (!ev_loop_done);	1161	while (activecnt && !loop_done);
578		1162
579	if (ev_loop_done != 2)	1163	if (loop_done != 2)
580	ev_loop_done = 0;	1164	loop_done = 0;
		1165	}
		1166
		1167	void
		1168	ev_unloop (EV_P_ int how)
		1169	{
		1170	loop_done = how;
581	}	1171	}
582		1172
583	/*****************************************************************************/	1173	/*****************************************************************************/
584		1174
585	static void	1175	inline void
586	wlist_add (WL *head, WL elem)	1176	wlist_add (WL *head, WL elem)
587	{	1177	{
588	elem->next = *head;	1178	elem->next = *head;
589	*head = elem;	1179	*head = elem;
590	}	1180	}
591		1181
592	static void	1182	inline void
593	wlist_del (WL *head, WL elem)	1183	wlist_del (WL *head, WL elem)
594	{	1184	{
595	while (*head)	1185	while (*head)
596	{	1186	{
597	if (*head == elem)	1187	if (*head == elem)
602		1192
603	head = &(*head)->next;	1193	head = &(*head)->next;
604	}	1194	}
605	}	1195	}
606		1196
607	static void	1197	inline void
608	ev_clear (W w)	1198	ev_clear_pending (EV_P_ W w)
609	{	1199	{
610	if (w->pending)	1200	if (w->pending)
611	{	1201	{
612	pendings [w->pending - 1].w = 0;	1202	pendings [ABSPRI (w)][w->pending - 1].w = 0;
613	w->pending = 0;	1203	w->pending = 0;
614	}	1204	}
615	}	1205	}
616		1206
617	static void	1207	inline void
618	ev_start (W w, int active)	1208	ev_start (EV_P_ W w, int active)
619	{	1209	{
		1210	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1211	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1212
620	w->active = active;	1213	w->active = active;
		1214	ev_ref (EV_A);
621	}	1215	}
622		1216
623	static void	1217	inline void
624	ev_stop (W w)	1218	ev_stop (EV_P_ W w)
625	{	1219	{
		1220	ev_unref (EV_A);
626	w->active = 0;	1221	w->active = 0;
627	}	1222	}
628		1223
629	/*****************************************************************************/	1224	/*****************************************************************************/
630		1225
631	void	1226	void
632	evio_start (struct ev_io *w)	1227	ev_io_start (EV_P_ struct ev_io *w)
633	{	1228	{
		1229	int fd = w->fd;
		1230
634	if (ev_is_active (w))	1231	if (ev_is_active (w))
635	return;	1232	return;
636		1233
637	int fd = w->fd;	1234	assert (("ev_io_start called with negative fd", fd >= 0));
638		1235
639	ev_start ((W)w, 1);	1236	ev_start (EV_A_ (W)w, 1);
640	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1237	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
641	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1238	wlist_add ((WL *)&anfds[fd].head, (WL)w);
642		1239
643	++fdchangecnt;	1240	fd_change (EV_A_ fd);
644	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
645	fdchanges [fdchangecnt - 1] = fd;
646	}	1241	}
647		1242
648	void	1243	void
649	evio_stop (struct ev_io *w)	1244	ev_io_stop (EV_P_ struct ev_io *w)
650	{	1245	{
651	ev_clear ((W)w);	1246	ev_clear_pending (EV_A_ (W)w);
652	if (!ev_is_active (w))	1247	if (!ev_is_active (w))
653	return;	1248	return;
654		1249
655	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1250	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
656	ev_stop ((W)w);	1251	ev_stop (EV_A_ (W)w);
657		1252
658	++fdchangecnt;	1253	fd_change (EV_A_ w->fd);
659	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
660	fdchanges [fdchangecnt - 1] = w->fd;
661	}	1254	}
662		1255
663	void	1256	void
664	evtimer_start (struct ev_timer *w)	1257	ev_timer_start (EV_P_ struct ev_timer *w)
665	{	1258	{
666	if (ev_is_active (w))	1259	if (ev_is_active (w))
667	return;	1260	return;
668		1261
669	w->at += now;	1262	((WT)w)->at += mn_now;
670		1263
671	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1264	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
672		1265
673	ev_start ((W)w, ++timercnt);	1266	ev_start (EV_A_ (W)w, ++timercnt);
674	array_needsize (timers, timermax, timercnt, );	1267	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
675	timers [timercnt - 1] = w;	1268	timers [timercnt - 1] = w;
676	upheap ((WT *)timers, timercnt - 1);	1269	upheap ((WT *)timers, timercnt - 1);
677	}
678		1270
		1271	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1272	}
		1273
679	void	1274	void
680	evtimer_stop (struct ev_timer *w)	1275	ev_timer_stop (EV_P_ struct ev_timer *w)
681	{	1276	{
682	ev_clear ((W)w);	1277	ev_clear_pending (EV_A_ (W)w);
683	if (!ev_is_active (w))	1278	if (!ev_is_active (w))
684	return;	1279	return;
685		1280
		1281	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1282
686	if (w->active < timercnt--)	1283	if (((W)w)->active < timercnt--)
687	{	1284	{
688	timers [w->active - 1] = timers [timercnt];	1285	timers [((W)w)->active - 1] = timers [timercnt];
689	downheap ((WT *)timers, timercnt, w->active - 1);	1286	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
690	}	1287	}
691		1288
692	w->at = w->repeat;	1289	((WT)w)->at = w->repeat;
693		1290
694	ev_stop ((W)w);	1291	ev_stop (EV_A_ (W)w);
695	}	1292	}
696		1293
697	void	1294	void
698	evtimer_again (struct ev_timer *w)	1295	ev_timer_again (EV_P_ struct ev_timer *w)
699	{	1296	{
700	if (ev_is_active (w))	1297	if (ev_is_active (w))
701	{	1298	{
702	if (w->repeat)	1299	if (w->repeat)
703	{	1300	{
704	w->at = now + w->repeat;	1301	((WT)w)->at = mn_now + w->repeat;
705	downheap ((WT *)timers, timercnt, w->active - 1);	1302	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
706	}	1303	}
707	else	1304	else
708	evtimer_stop (w);	1305	ev_timer_stop (EV_A_ w);
709	}	1306	}
710	else if (w->repeat)	1307	else if (w->repeat)
711	evtimer_start (w);	1308	ev_timer_start (EV_A_ w);
712	}	1309	}
713		1310
714	void	1311	void
715	evperiodic_start (struct ev_periodic *w)	1312	ev_periodic_start (EV_P_ struct ev_periodic *w)
716	{	1313	{
717	if (ev_is_active (w))	1314	if (ev_is_active (w))
718	return;	1315	return;
719		1316
720	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1317	if (w->reschedule_cb)
721		1318	((WT)w)->at = w->reschedule_cb (w, rt_now);
		1319	else if (w->interval)
		1320	{
		1321	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
722	/* this formula differs from the one in periodic_reify because we do not always round up */	1322	/* this formula differs from the one in periodic_reify because we do not always round up */
723	if (w->interval)
724	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1323	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1324	}
725		1325
726	ev_start ((W)w, ++periodiccnt);	1326	ev_start (EV_A_ (W)w, ++periodiccnt);
727	array_needsize (periodics, periodicmax, periodiccnt, );	1327	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
728	periodics [periodiccnt - 1] = w;	1328	periodics [periodiccnt - 1] = w;
729	upheap ((WT *)periodics, periodiccnt - 1);	1329	upheap ((WT *)periodics, periodiccnt - 1);
730	}
731		1330
		1331	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1332	}
		1333
732	void	1334	void
733	evperiodic_stop (struct ev_periodic *w)	1335	ev_periodic_stop (EV_P_ struct ev_periodic *w)
734	{	1336	{
735	ev_clear ((W)w);	1337	ev_clear_pending (EV_A_ (W)w);
736	if (!ev_is_active (w))	1338	if (!ev_is_active (w))
737	return;	1339	return;
738		1340
		1341	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1342
739	if (w->active < periodiccnt--)	1343	if (((W)w)->active < periodiccnt--)
740	{	1344	{
741	periodics [w->active - 1] = periodics [periodiccnt];	1345	periodics [((W)w)->active - 1] = periodics [periodiccnt];
742	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1346	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
743	}	1347	}
744		1348
745	ev_stop ((W)w);	1349	ev_stop (EV_A_ (W)w);
746	}	1350	}
747		1351
748	void	1352	void
749	evsignal_start (struct ev_signal *w)	1353	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1354	{
		1355	ev_periodic_stop (EV_A_ w);
		1356	ev_periodic_start (EV_A_ w);
		1357	}
		1358
		1359	void
		1360	ev_idle_start (EV_P_ struct ev_idle *w)
750	{	1361	{
751	if (ev_is_active (w))	1362	if (ev_is_active (w))
752	return;	1363	return;
753		1364
		1365	ev_start (EV_A_ (W)w, ++idlecnt);
		1366	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1367	idles [idlecnt - 1] = w;
		1368	}
		1369
		1370	void
		1371	ev_idle_stop (EV_P_ struct ev_idle *w)
		1372	{
		1373	ev_clear_pending (EV_A_ (W)w);
		1374	if (ev_is_active (w))
		1375	return;
		1376
		1377	idles [((W)w)->active - 1] = idles [--idlecnt];
		1378	ev_stop (EV_A_ (W)w);
		1379	}
		1380
		1381	void
		1382	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1383	{
		1384	if (ev_is_active (w))
		1385	return;
		1386
		1387	ev_start (EV_A_ (W)w, ++preparecnt);
		1388	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1389	prepares [preparecnt - 1] = w;
		1390	}
		1391
		1392	void
		1393	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1394	{
		1395	ev_clear_pending (EV_A_ (W)w);
		1396	if (ev_is_active (w))
		1397	return;
		1398
		1399	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1400	ev_stop (EV_A_ (W)w);
		1401	}
		1402
		1403	void
		1404	ev_check_start (EV_P_ struct ev_check *w)
		1405	{
		1406	if (ev_is_active (w))
		1407	return;
		1408
		1409	ev_start (EV_A_ (W)w, ++checkcnt);
		1410	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1411	checks [checkcnt - 1] = w;
		1412	}
		1413
		1414	void
		1415	ev_check_stop (EV_P_ struct ev_check *w)
		1416	{
		1417	ev_clear_pending (EV_A_ (W)w);
		1418	if (ev_is_active (w))
		1419	return;
		1420
		1421	checks [((W)w)->active - 1] = checks [--checkcnt];
		1422	ev_stop (EV_A_ (W)w);
		1423	}
		1424
		1425	#ifndef SA_RESTART
		1426	# define SA_RESTART 0
		1427	#endif
		1428
		1429	void
		1430	ev_signal_start (EV_P_ struct ev_signal *w)
		1431	{
		1432	#if EV_MULTIPLICITY
		1433	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1434	#endif
		1435	if (ev_is_active (w))
		1436	return;
		1437
		1438	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1439
754	ev_start ((W)w, 1);	1440	ev_start (EV_A_ (W)w, 1);
755	array_needsize (signals, signalmax, w->signum, signals_init);	1441	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
756	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1442	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
757		1443
758	if (!w->next)	1444	if (!((WL)w)->next)
759	{	1445	{
		1446	#if WIN32
		1447	signal (w->signum, sighandler);
		1448	#else
760	struct sigaction sa;	1449	struct sigaction sa;
761	sa.sa_handler = sighandler;	1450	sa.sa_handler = sighandler;
762	sigfillset (&sa.sa_mask);	1451	sigfillset (&sa.sa_mask);
763	sa.sa_flags = 0;	1452	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
764	sigaction (w->signum, &sa, 0);	1453	sigaction (w->signum, &sa, 0);
		1454	#endif
765	}	1455	}
766	}	1456	}
767		1457
768	void	1458	void
769	evsignal_stop (struct ev_signal *w)	1459	ev_signal_stop (EV_P_ struct ev_signal *w)
770	{	1460	{
771	ev_clear ((W)w);	1461	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1462	if (!ev_is_active (w))
773	return;	1463	return;
774		1464
775	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1465	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
776	ev_stop ((W)w);	1466	ev_stop (EV_A_ (W)w);
777		1467
778	if (!signals [w->signum - 1].head)	1468	if (!signals [w->signum - 1].head)
779	signal (w->signum, SIG_DFL);	1469	signal (w->signum, SIG_DFL);
780	}	1470	}
781		1471
782	void evidle_start (struct ev_idle *w)	1472	void
		1473	ev_child_start (EV_P_ struct ev_child *w)
783	{	1474	{
		1475	#if EV_MULTIPLICITY
		1476	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1477	#endif
784	if (ev_is_active (w))	1478	if (ev_is_active (w))
785	return;	1479	return;
786		1480
787	ev_start ((W)w, ++idlecnt);	1481	ev_start (EV_A_ (W)w, 1);
788	array_needsize (idles, idlemax, idlecnt, );	1482	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
789	idles [idlecnt - 1] = w;
790	}	1483	}
791		1484
792	void evidle_stop (struct ev_idle *w)	1485	void
		1486	ev_child_stop (EV_P_ struct ev_child *w)
793	{	1487	{
794	ev_clear ((W)w);	1488	ev_clear_pending (EV_A_ (W)w);
795	if (ev_is_active (w))	1489	if (ev_is_active (w))
796	return;	1490	return;
797		1491
798	idles [w->active - 1] = idles [--idlecnt];	1492	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
799	ev_stop ((W)w);	1493	ev_stop (EV_A_ (W)w);
800	}
801
802	void evcheck_start (struct ev_check *w)
803	{
804	if (ev_is_active (w))
805	return;
806
807	ev_start ((W)w, ++checkcnt);
808	array_needsize (checks, checkmax, checkcnt, );
809	checks [checkcnt - 1] = w;
810	}
811
812	void evcheck_stop (struct ev_check *w)
813	{
814	ev_clear ((W)w);
815	if (ev_is_active (w))
816	return;
817
818	checks [w->active - 1] = checks [--checkcnt];
819	ev_stop ((W)w);
820	}	1494	}
821		1495
822	/*****************************************************************************/	1496	/*****************************************************************************/
823		1497
824	struct ev_once	1498	struct ev_once
…		…
828	void (cb)(int revents, void arg);	1502	void (cb)(int revents, void arg);
829	void *arg;	1503	void *arg;
830	};	1504	};
831		1505
832	static void	1506	static void
833	once_cb (struct ev_once *once, int revents)	1507	once_cb (EV_P_ struct ev_once *once, int revents)
834	{	1508	{
835	void (cb)(int revents, void arg) = once->cb;	1509	void (cb)(int revents, void arg) = once->cb;
836	void *arg = once->arg;	1510	void *arg = once->arg;
837		1511
838	evio_stop (&once->io);	1512	ev_io_stop (EV_A_ &once->io);
839	evtimer_stop (&once->to);	1513	ev_timer_stop (EV_A_ &once->to);
840	free (once);	1514	ev_free (once);
841		1515
842	cb (revents, arg);	1516	cb (revents, arg);
843	}	1517	}
844		1518
845	static void	1519	static void
846	once_cb_io (struct ev_io *w, int revents)	1520	once_cb_io (EV_P_ struct ev_io *w, int revents)
847	{	1521	{
848	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1522	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
849	}	1523	}
850		1524
851	static void	1525	static void
852	once_cb_to (struct ev_timer *w, int revents)	1526	once_cb_to (EV_P_ struct ev_timer *w, int revents)
853	{	1527	{
854	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1528	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
855	}	1529	}
856		1530
857	void	1531	void
858	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1532	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
859	{	1533	{
860	struct ev_once *once = malloc (sizeof (struct ev_once));	1534	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
861		1535
862	if (!once)	1536	if (!once)
863	cb (EV_ERROR, arg);	1537	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
864	else	1538	else
865	{	1539	{
866	once->cb = cb;	1540	once->cb = cb;
867	once->arg = arg;	1541	once->arg = arg;
868		1542
869	evw_init (&once->io, once_cb_io);	1543	ev_watcher_init (&once->io, once_cb_io);
870
871	if (fd >= 0)	1544	if (fd >= 0)
872	{	1545	{
873	evio_set (&once->io, fd, events);	1546	ev_io_set (&once->io, fd, events);
874	evio_start (&once->io);	1547	ev_io_start (EV_A_ &once->io);
875	}	1548	}
876		1549
877	evw_init (&once->to, once_cb_to);	1550	ev_watcher_init (&once->to, once_cb_to);
878
879	if (timeout >= 0.)	1551	if (timeout >= 0.)
880	{	1552	{
881	evtimer_set (&once->to, timeout, 0.);	1553	ev_timer_set (&once->to, timeout, 0.);
882	evtimer_start (&once->to);	1554	ev_timer_start (EV_A_ &once->to);
883	}	1555	}
884	}	1556	}
885	}	1557	}
886		1558
887	/*****************************************************************************/
888
889	#if 0
890
891	struct ev_io wio;
892
893	static void
894	sin_cb (struct ev_io *w, int revents)
895	{
896	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
897	}
898
899	static void
900	ocb (struct ev_timer *w, int revents)
901	{
902	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
903	evtimer_stop (w);
904	evtimer_start (w);
905	}
906
907	static void
908	scb (struct ev_signal *w, int revents)
909	{
910	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
911	evio_stop (&wio);
912	evio_start (&wio);
913	}
914
915	static void
916	gcb (struct ev_signal *w, int revents)
917	{
918	fprintf (stderr, "generic %x\n", revents);
919
920	}
921
922	int main (void)
923	{
924	ev_init (0);
925
926	evio_init (&wio, sin_cb, 0, EV_READ);
927	evio_start (&wio);
928
929	struct ev_timer t[10000];
930
931	#if 0
932	int i;
933	for (i = 0; i < 10000; ++i)
934	{
935	struct ev_timer *w = t + i;
936	evw_init (w, ocb, i);
937	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
938	evtimer_start (w);
939	if (drand48 () < 0.5)
940	evtimer_stop (w);
941	}
942	#endif
943
944	struct ev_timer t1;
945	evtimer_init (&t1, ocb, 5, 10);
946	evtimer_start (&t1);
947
948	struct ev_signal sig;
949	evsignal_init (&sig, scb, SIGQUIT);
950	evsignal_start (&sig);
951
952	struct ev_check cw;
953	evcheck_init (&cw, gcb);
954	evcheck_start (&cw);
955
956	struct ev_idle iw;
957	evidle_init (&iw, gcb);
958	evidle_start (&iw);
959
960	ev_loop (0);
961
962	return 0;
963	}
964
965	#endif
966
967
968
969

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing libev/ev.c (file contents): Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC vs. Revision 1.77 by root, Thu Nov 8 00:44:17 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC vs.
Revision 1.77 by root, Thu Nov 8 00:44:17 2007 UTC