[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 1.78 by root, Thu Nov 8 21:08:56 2007 UTC

…		…
		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without
		8	* modification, are permitted provided that the following conditions are
		9	* met:
		10	*
		11	* * Redistributions of source code must retain the above copyright
		12	* notice, this list of conditions and the following disclaimer.
		13	*
		14	* * Redistributions in binary form must reproduce the above
		15	* copyright notice, this list of conditions and the following
		16	* disclaimer in the documentation and/or other materials provided
		17	* with the distribution.
		18	*
		19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
		22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
		23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
		24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
		25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
		29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
		55	#endif
		56
1	#include <math.h>	57	#include <math.h>
2	#include <stdlib.h>	58	#include <stdlib.h>
3	#include <unistd.h>
4	#include <fcntl.h>	59	#include <fcntl.h>
5	#include <signal.h>	60	#include <stddef.h>
6		61
7	#include <stdio.h>	62	#include <stdio.h>
8		63
9	#include <assert.h>	64	#include <assert.h>
10	#include <errno.h>	65	#include <errno.h>
11	#include <sys/time.h>	66	#include <sys/types.h>
12	#include <time.h>	67	#include <time.h>
13		68
		69	#include <signal.h>
		70
		71	#ifndef WIN32
		72	# include <unistd.h>
		73	# include <sys/time.h>
		74	# include <sys/wait.h>
		75	#endif
		76	/**/
		77
14	#ifndef HAVE_MONOTONIC	78	#ifndef EV_USE_MONOTONIC
15	# ifdef CLOCK_MONOTONIC
16	# define HAVE_MONOTONIC 1	79	# define EV_USE_MONOTONIC 1
		80	#endif
		81
		82	#ifndef EV_USE_SELECT
		83	# define EV_USE_SELECT 1
		84	#endif
		85
		86	#ifndef EV_USE_POLL
		87	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		88	#endif
		89
		90	#ifndef EV_USE_EPOLL
		91	# define EV_USE_EPOLL 0
		92	#endif
		93
		94	#ifndef EV_USE_KQUEUE
		95	# define EV_USE_KQUEUE 0
		96	#endif
		97
		98	#ifndef EV_USE_WIN32
		99	# ifdef WIN32
		100	# define EV_USE_WIN32 0 /* it does not exist, use select */
		101	# undef EV_USE_SELECT
		102	# define EV_USE_SELECT 1
		103	# else
		104	# define EV_USE_WIN32 0
17	# endif	105	# endif
18	#endif	106	#endif
19		107
20	#ifndef HAVE_SELECT
21	# define HAVE_SELECT 1
22	#endif
23
24	#ifndef HAVE_EPOLL
25	# define HAVE_EPOLL 0
26	#endif
27
28	#ifndef HAVE_REALTIME	108	#ifndef EV_USE_REALTIME
29	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	109	# define EV_USE_REALTIME 1
30	#endif	110	#endif
		111
		112	/**/
		113
		114	#ifndef CLOCK_MONOTONIC
		115	# undef EV_USE_MONOTONIC
		116	# define EV_USE_MONOTONIC 0
		117	#endif
		118
		119	#ifndef CLOCK_REALTIME
		120	# undef EV_USE_REALTIME
		121	# define EV_USE_REALTIME 0
		122	#endif
		123
		124	/**/
31		125
32	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	126	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
33	#define MAX_BLOCKTIME 60.	127	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		128	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		129	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
34		130
35	#include "ev.h"	131	#include "ev.h"
36		132
37	struct ev_watcher {	133	#if __GNUC__ >= 3
38	EV_WATCHER (ev_watcher);	134	# define expect(expr,value) __builtin_expect ((expr),(value))
39	};	135	# define inline inline
		136	#else
		137	# define expect(expr,value) (expr)
		138	# define inline static
		139	#endif
40		140
41	struct ev_watcher_list {	141	#define expect_false(expr) expect ((expr) != 0, 0)
42	EV_WATCHER_LIST (ev_watcher_list);	142	#define expect_true(expr) expect ((expr) != 0, 1)
43	};	143
		144	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		145	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
44		146
45	typedef struct ev_watcher *W;	147	typedef struct ev_watcher *W;
46	typedef struct ev_watcher_list *WL;	148	typedef struct ev_watcher_list *WL;
		149	typedef struct ev_watcher_time *WT;
47		150
48	static ev_tstamp now, diff; /* monotonic clock */	151	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
49	ev_tstamp ev_now;
50	int ev_method;
51		152
52	static int have_monotonic; /* runtime */	153	#include "ev_win32.c"
53
54	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
55	static void (*method_modify)(int fd, int oev, int nev);
56	static void (*method_poll)(ev_tstamp timeout);
57		154
58	/*****************************************************************************/	155	/*****************************************************************************/
59		156
60	ev_tstamp	157	static void (syserr_cb)(const char msg);
		158
		159	void ev_set_syserr_cb (void (cb)(const char msg))
		160	{
		161	syserr_cb = cb;
		162	}
		163
		164	static void
		165	syserr (const char *msg)
		166	{
		167	if (!msg)
		168	msg = "(libev) system error";
		169
		170	if (syserr_cb)
		171	syserr_cb (msg);
		172	else
		173	{
		174	perror (msg);
		175	abort ();
		176	}
		177	}
		178
		179	static void (alloc)(void *ptr, long size);
		180
		181	void ev_set_allocator (void (cb)(void *ptr, long size))
		182	{
		183	alloc = cb;
		184	}
		185
		186	static void *
		187	ev_realloc (void *ptr, long size)
		188	{
		189	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		190
		191	if (!ptr && size)
		192	{
		193	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		194	abort ();
		195	}
		196
		197	return ptr;
		198	}
		199
		200	#define ev_malloc(size) ev_realloc (0, (size))
		201	#define ev_free(ptr) ev_realloc ((ptr), 0)
		202
		203	/*****************************************************************************/
		204
		205	typedef struct
		206	{
		207	WL head;
		208	unsigned char events;
		209	unsigned char reify;
		210	} ANFD;
		211
		212	typedef struct
		213	{
		214	W w;
		215	int events;
		216	} ANPENDING;
		217
		218	#if EV_MULTIPLICITY
		219
		220	struct ev_loop
		221	{
		222	# define VAR(name,decl) decl;
		223	# include "ev_vars.h"
		224	};
		225	# undef VAR
		226	# include "ev_wrap.h"
		227
		228	#else
		229
		230	# define VAR(name,decl) static decl;
		231	# include "ev_vars.h"
		232	# undef VAR
		233
		234	#endif
		235
		236	/*****************************************************************************/
		237
		238	inline ev_tstamp
61	ev_time (void)	239	ev_time (void)
62	{	240	{
63	#if HAVE_REALTIME	241	#if EV_USE_REALTIME
64	struct timespec ts;	242	struct timespec ts;
65	clock_gettime (CLOCK_REALTIME, &ts);	243	clock_gettime (CLOCK_REALTIME, &ts);
66	return ts.tv_sec + ts.tv_nsec * 1e-9;	244	return ts.tv_sec + ts.tv_nsec * 1e-9;
67	#else	245	#else
68	struct timeval tv;	246	struct timeval tv;
69	gettimeofday (&tv, 0);	247	gettimeofday (&tv, 0);
70	return tv.tv_sec + tv.tv_usec * 1e-6;	248	return tv.tv_sec + tv.tv_usec * 1e-6;
71	#endif	249	#endif
72	}	250	}
73		251
74	static ev_tstamp	252	inline ev_tstamp
75	get_clock (void)	253	get_clock (void)
76	{	254	{
77	#if HAVE_MONOTONIC	255	#if EV_USE_MONOTONIC
78	if (have_monotonic)	256	if (expect_true (have_monotonic))
79	{	257	{
80	struct timespec ts;	258	struct timespec ts;
81	clock_gettime (CLOCK_MONOTONIC, &ts);	259	clock_gettime (CLOCK_MONOTONIC, &ts);
82	return ts.tv_sec + ts.tv_nsec * 1e-9;	260	return ts.tv_sec + ts.tv_nsec * 1e-9;
83	}	261	}
84	#endif	262	#endif
85		263
86	return ev_time ();	264	return ev_time ();
87	}	265	}
88		266
		267	ev_tstamp
		268	ev_now (EV_P)
		269	{
		270	return rt_now;
		271	}
		272
		273	#define array_roundsize(type,n) ((n) \| 4 & ~3)
		274
89	#define array_needsize(base,cur,cnt,init) \	275	#define array_needsize(type,base,cur,cnt,init) \
90	if ((cnt) > cur) \	276	if (expect_false ((cnt) > cur)) \
91	{ \	277	{ \
92	int newcnt = cur ? cur << 1 : 16; \	278	int newcnt = cur; \
93	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	279	do \
		280	{ \
		281	newcnt = array_roundsize (type, newcnt << 1); \
		282	} \
		283	while ((cnt) > newcnt); \
		284	\
94	base = realloc (base, sizeof (base) (newcnt)); \	285	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
95	init (base + cur, newcnt - cur); \	286	init (base + cur, newcnt - cur); \
96	cur = newcnt; \	287	cur = newcnt; \
97	}	288	}
		289
		290	#define array_slim(type,stem) \
		291	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		292	{ \
		293	stem ## max = array_roundsize (stem ## cnt >> 1); \
		294	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
		295	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		296	}
		297
		298	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		299	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		300	#define array_free_microshit(stem) \
		301	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		302
		303	#define array_free(stem, idx) \
		304	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
98		305
99	/*****************************************************************************/	306	/*****************************************************************************/
100		307
101	typedef struct
102	{
103	struct ev_io *head;
104	unsigned char wev, rev; /* want, received event set */
105	} ANFD;
106
107	static ANFD *anfds;
108	static int anfdmax;
109
110	static int *fdchanges;
111	static int fdchangemax, fdchangecnt;
112
113	static void	308	static void
114	anfds_init (ANFD *base, int count)	309	anfds_init (ANFD *base, int count)
115	{	310	{
116	while (count--)	311	while (count--)
117	{	312	{
118	base->head = 0;	313	base->head = 0;
119	base->wev = base->rev = EV_NONE;	314	base->events = EV_NONE;
		315	base->reify = 0;
		316
120	++base;	317	++base;
121	}	318	}
122	}	319	}
123		320
124	typedef struct	321	void
		322	ev_feed_event (EV_P_ void *w, int revents)
125	{	323	{
126	W w;	324	W w_ = (W)w;
127	int events;
128	} ANPENDING;
129		325
130	static ANPENDING *pendings;	326	if (w_->pending)
131	static int pendingmax, pendingcnt;	327	{
		328	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		329	return;
		330	}
132		331
133	static void
134	event (W w, int events)
135	{
136	w->pending = ++pendingcnt;	332	w_->pending = ++pendingcnt [ABSPRI (w_)];
137	array_needsize (pendings, pendingmax, pendingcnt, );	333	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
138	pendings [pendingcnt - 1].w = w;	334	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
139	pendings [pendingcnt - 1].events = events;	335	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
140	}	336	}
141		337
142	static void	338	static void
		339	queue_events (EV_P_ W *events, int eventcnt, int type)
		340	{
		341	int i;
		342
		343	for (i = 0; i < eventcnt; ++i)
		344	ev_feed_event (EV_A_ events [i], type);
		345	}
		346
		347	static void
143	fd_event (int fd, int events)	348	fd_event (EV_P_ int fd, int events)
144	{	349	{
145	ANFD *anfd = anfds + fd;	350	ANFD *anfd = anfds + fd;
146	struct ev_io *w;	351	struct ev_io *w;
147		352
148	for (w = anfd->head; w; w = w->next)	353	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
149	{	354	{
150	int ev = w->events & events;	355	int ev = w->events & events;
151		356
152	if (ev)	357	if (ev)
153	event ((W)w, ev);	358	ev_feed_event (EV_A_ (W)w, ev);
154	}	359	}
155	}	360	}
156		361
		362	/*****************************************************************************/
		363
157	static void	364	static void
158	queue_events (W *events, int eventcnt, int type)	365	fd_reify (EV_P)
159	{	366	{
160	int i;	367	int i;
161		368
162	for (i = 0; i < eventcnt; ++i)	369	for (i = 0; i < fdchangecnt; ++i)
163	event (events [i], type);	370	{
		371	int fd = fdchanges [i];
		372	ANFD *anfd = anfds + fd;
		373	struct ev_io *w;
		374
		375	int events = 0;
		376
		377	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		378	events \|= w->events;
		379
		380	anfd->reify = 0;
		381
		382	method_modify (EV_A_ fd, anfd->events, events);
		383	anfd->events = events;
		384	}
		385
		386	fdchangecnt = 0;
		387	}
		388
		389	static void
		390	fd_change (EV_P_ int fd)
		391	{
		392	if (anfds [fd].reify)
		393	return;
		394
		395	anfds [fd].reify = 1;
		396
		397	++fdchangecnt;
		398	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		399	fdchanges [fdchangecnt - 1] = fd;
		400	}
		401
		402	static void
		403	fd_kill (EV_P_ int fd)
		404	{
		405	struct ev_io *w;
		406
		407	while ((w = (struct ev_io *)anfds [fd].head))
		408	{
		409	ev_io_stop (EV_A_ w);
		410	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		411	}
		412	}
		413
		414	static int
		415	fd_valid (int fd)
		416	{
		417	#ifdef WIN32
		418	return !!win32_get_osfhandle (fd);
		419	#else
		420	return fcntl (fd, F_GETFD) != -1;
		421	#endif
		422	}
		423
		424	/* called on EBADF to verify fds */
		425	static void
		426	fd_ebadf (EV_P)
		427	{
		428	int fd;
		429
		430	for (fd = 0; fd < anfdmax; ++fd)
		431	if (anfds [fd].events)
		432	if (!fd_valid (fd) == -1 && errno == EBADF)
		433	fd_kill (EV_A_ fd);
		434	}
		435
		436	/* called on ENOMEM in select/poll to kill some fds and retry */
		437	static void
		438	fd_enomem (EV_P)
		439	{
		440	int fd;
		441
		442	for (fd = anfdmax; fd--; )
		443	if (anfds [fd].events)
		444	{
		445	fd_kill (EV_A_ fd);
		446	return;
		447	}
		448	}
		449
		450	/* usually called after fork if method needs to re-arm all fds from scratch */
		451	static void
		452	fd_rearm_all (EV_P)
		453	{
		454	int fd;
		455
		456	/* this should be highly optimised to not do anything but set a flag */
		457	for (fd = 0; fd < anfdmax; ++fd)
		458	if (anfds [fd].events)
		459	{
		460	anfds [fd].events = 0;
		461	fd_change (EV_A_ fd);
		462	}
164	}	463	}
165		464
166	/*****************************************************************************/	465	/*****************************************************************************/
167		466
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	467	static void
175	upheap (struct ev_timer **timers, int k)	468	upheap (WT *heap, int k)
176	{	469	{
177	struct ev_timer *w = timers [k];	470	WT w = heap [k];
178		471
179	while (k && timers [k >> 1]->at > w->at)	472	while (k && heap [k >> 1]->at > w->at)
180	{	473	{
181	timers [k] = timers [k >> 1];	474	heap [k] = heap [k >> 1];
182	timers [k]->active = k + 1;	475	((W)heap [k])->active = k + 1;
183	k >>= 1;	476	k >>= 1;
184	}	477	}
185		478
186	timers [k] = w;	479	heap [k] = w;
187	timers [k]->active = k + 1;	480	((W)heap [k])->active = k + 1;
188		481
189	}	482	}
190		483
191	static void	484	static void
192	downheap (struct ev_timer **timers, int N, int k)	485	downheap (WT *heap, int N, int k)
193	{	486	{
194	struct ev_timer *w = timers [k];	487	WT w = heap [k];
195		488
196	while (k < (N >> 1))	489	while (k < (N >> 1))
197	{	490	{
198	int j = k << 1;	491	int j = k << 1;
199		492
200	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	493	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
201	++j;	494	++j;
202		495
203	if (w->at <= timers [j]->at)	496	if (w->at <= heap [j]->at)
204	break;	497	break;
205		498
206	timers [k] = timers [j];	499	heap [k] = heap [j];
207	timers [k]->active = k + 1;	500	((W)heap [k])->active = k + 1;
208	k = j;	501	k = j;
209	}	502	}
210		503
211	timers [k] = w;	504	heap [k] = w;
212	timers [k]->active = k + 1;	505	((W)heap [k])->active = k + 1;
213	}	506	}
214		507
215	/*****************************************************************************/	508	/*****************************************************************************/
216		509
217	typedef struct	510	typedef struct
218	{	511	{
219	struct ev_signal *head;	512	WL head;
220	sig_atomic_t gotsig;	513	sig_atomic_t volatile gotsig;
221	} ANSIG;	514	} ANSIG;
222		515
223	static ANSIG *signals;	516	static ANSIG *signals;
224	static int signalmax;	517	static int signalmax;
225		518
226	static int sigpipe [2];	519	static int sigpipe [2];
227	static sig_atomic_t gotsig;	520	static sig_atomic_t volatile gotsig;
228	static struct ev_io sigev;	521	static struct ev_io sigev;
229		522
230	static void	523	static void
231	signals_init (ANSIG *base, int count)	524	signals_init (ANSIG *base, int count)
232	{	525	{
233	while (count--)	526	while (count--)
234	{	527	{
235	base->head = 0;	528	base->head = 0;
236	base->gotsig = 0;	529	base->gotsig = 0;
		530
237	++base;	531	++base;
238	}	532	}
239	}	533	}
240		534
241	static void	535	static void
242	sighandler (int signum)	536	sighandler (int signum)
243	{	537	{
		538	#if WIN32
		539	signal (signum, sighandler);
		540	#endif
		541
244	signals [signum - 1].gotsig = 1;	542	signals [signum - 1].gotsig = 1;
245		543
246	if (!gotsig)	544	if (!gotsig)
247	{	545	{
		546	int old_errno = errno;
248	gotsig = 1;	547	gotsig = 1;
		548	#ifdef WIN32
		549	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		550	#else
249	write (sigpipe [1], &gotsig, 1);	551	write (sigpipe [1], &signum, 1);
		552	#endif
		553	errno = old_errno;
250	}	554	}
251	}	555	}
252		556
253	static void	557	static void
254	sigcb (struct ev_io *iow, int revents)	558	sigcb (EV_P_ struct ev_io *iow, int revents)
255	{	559	{
256	struct ev_signal *w;	560	WL w;
257	int sig;	561	int signum;
258		562
		563	#ifdef WIN32
		564	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		565	#else
		566	read (sigpipe [0], &revents, 1);
		567	#endif
259	gotsig = 0;	568	gotsig = 0;
260	read (sigpipe [0], &revents, 1);
261		569
262	for (sig = signalmax; sig--; )	570	for (signum = signalmax; signum--; )
263	if (signals [sig].gotsig)	571	if (signals [signum].gotsig)
264	{	572	{
265	signals [sig].gotsig = 0;	573	signals [signum].gotsig = 0;
266		574
267	for (w = signals [sig].head; w; w = w->next)	575	for (w = signals [signum].head; w; w = w->next)
268	event ((W)w, EV_SIGNAL);	576	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
269	}	577	}
270	}	578	}
271		579
272	static void	580	static void
273	siginit (void)	581	siginit (EV_P)
274	{	582	{
		583	#ifndef WIN32
275	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	584	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
276	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	585	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
277		586
278	/* rather than sort out wether we really need nb, set it */	587	/* rather than sort out wether we really need nb, set it */
279	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	588	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
280	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	589	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		590	#endif
281		591
282	evio_set (&sigev, sigpipe [0], EV_READ);	592	ev_io_set (&sigev, sigpipe [0], EV_READ);
283	evio_start (&sigev);	593	ev_io_start (EV_A_ &sigev);
		594	ev_unref (EV_A); /* child watcher should not keep loop alive */
284	}	595	}
285		596
286	/*****************************************************************************/	597	/*****************************************************************************/
287		598
288	static struct ev_idle **idles;	599	static struct ev_child *childs [PID_HASHSIZE];
289	static int idlemax, idlecnt;
290		600
291	static struct ev_check **checks;	601	#ifndef WIN32
292	static int checkmax, checkcnt;	602
		603	static struct ev_signal childev;
		604
		605	#ifndef WCONTINUED
		606	# define WCONTINUED 0
		607	#endif
		608
		609	static void
		610	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		611	{
		612	struct ev_child *w;
		613
		614	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		615	if (w->pid == pid \|\| !w->pid)
		616	{
		617	ev_priority (w) = ev_priority (sw); /* need to do it now */
		618	w->rpid = pid;
		619	w->rstatus = status;
		620	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		621	}
		622	}
		623
		624	static void
		625	childcb (EV_P_ struct ev_signal *sw, int revents)
		626	{
		627	int pid, status;
		628
		629	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		630	{
		631	/* make sure we are called again until all childs have been reaped */
		632	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		633
		634	child_reap (EV_A_ sw, pid, pid, status);
		635	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		636	}
		637	}
		638
		639	#endif
293		640
294	/*****************************************************************************/	641	/*****************************************************************************/
295		642
		643	#if EV_USE_KQUEUE
		644	# include "ev_kqueue.c"
		645	#endif
296	#if HAVE_EPOLL	646	#if EV_USE_EPOLL
297	# include "ev_epoll.c"	647	# include "ev_epoll.c"
298	#endif	648	#endif
		649	#if EV_USE_POLL
		650	# include "ev_poll.c"
		651	#endif
299	#if HAVE_SELECT	652	#if EV_USE_SELECT
300	# include "ev_select.c"	653	# include "ev_select.c"
301	#endif	654	#endif
302		655
303	int ev_init (int flags)	656	int
		657	ev_version_major (void)
304	{	658	{
		659	return EV_VERSION_MAJOR;
		660	}
		661
		662	int
		663	ev_version_minor (void)
		664	{
		665	return EV_VERSION_MINOR;
		666	}
		667
		668	/* return true if we are running with elevated privileges and should ignore env variables */
		669	static int
		670	enable_secure (void)
		671	{
		672	#ifdef WIN32
		673	return 0;
		674	#else
		675	return getuid () != geteuid ()
		676	\|\| getgid () != getegid ();
		677	#endif
		678	}
		679
		680	int
		681	ev_method (EV_P)
		682	{
		683	return method;
		684	}
		685
		686	static void
		687	loop_init (EV_P_ int methods)
		688	{
		689	if (!method)
		690	{
305	#if HAVE_MONOTONIC	691	#if EV_USE_MONOTONIC
306	{	692	{
307	struct timespec ts;	693	struct timespec ts;
308	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	694	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
309	have_monotonic = 1;	695	have_monotonic = 1;
310	}	696	}
311	#endif	697	#endif
312		698
313	ev_now = ev_time ();	699	rt_now = ev_time ();
314	now = get_clock ();	700	mn_now = get_clock ();
315	diff = ev_now - now;	701	now_floor = mn_now;
		702	rtmn_diff = rt_now - mn_now;
316		703
		704	if (methods == EVMETHOD_AUTO)
		705	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		706	methods = atoi (getenv ("LIBEV_METHODS"));
		707	else
		708	methods = EVMETHOD_ANY;
		709
		710	method = 0;
		711	#if EV_USE_WIN32
		712	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		713	#endif
		714	#if EV_USE_KQUEUE
		715	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		716	#endif
		717	#if EV_USE_EPOLL
		718	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		719	#endif
		720	#if EV_USE_POLL
		721	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		722	#endif
		723	#if EV_USE_SELECT
		724	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		725	#endif
		726
		727	ev_watcher_init (&sigev, sigcb);
		728	ev_set_priority (&sigev, EV_MAXPRI);
		729	}
		730	}
		731
		732	void
		733	loop_destroy (EV_P)
		734	{
		735	int i;
		736
		737	#if EV_USE_WIN32
		738	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		739	#endif
		740	#if EV_USE_KQUEUE
		741	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		742	#endif
		743	#if EV_USE_EPOLL
		744	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		745	#endif
		746	#if EV_USE_POLL
		747	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		748	#endif
		749	#if EV_USE_SELECT
		750	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		751	#endif
		752
		753	for (i = NUMPRI; i--; )
		754	array_free (pending, [i]);
		755
		756	/* have to use the microsoft-never-gets-it-right macro */
		757	array_free_microshit (fdchange);
		758	array_free_microshit (timer);
		759	array_free_microshit (periodic);
		760	array_free_microshit (idle);
		761	array_free_microshit (prepare);
		762	array_free_microshit (check);
		763
		764	method = 0;
		765	}
		766
		767	static void
		768	loop_fork (EV_P)
		769	{
		770	#if EV_USE_EPOLL
		771	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		772	#endif
		773	#if EV_USE_KQUEUE
		774	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		775	#endif
		776
		777	if (ev_is_active (&sigev))
		778	{
		779	/* default loop */
		780
		781	ev_ref (EV_A);
		782	ev_io_stop (EV_A_ &sigev);
		783	close (sigpipe [0]);
		784	close (sigpipe [1]);
		785
		786	while (pipe (sigpipe))
		787	syserr ("(libev) error creating pipe");
		788
		789	siginit (EV_A);
		790	}
		791
		792	postfork = 0;
		793	}
		794
		795	#if EV_MULTIPLICITY
		796	struct ev_loop *
		797	ev_loop_new (int methods)
		798	{
		799	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		800
		801	memset (loop, 0, sizeof (struct ev_loop));
		802
		803	loop_init (EV_A_ methods);
		804
		805	if (ev_method (EV_A))
		806	return loop;
		807
		808	return 0;
		809	}
		810
		811	void
		812	ev_loop_destroy (EV_P)
		813	{
		814	loop_destroy (EV_A);
		815	ev_free (loop);
		816	}
		817
		818	void
		819	ev_loop_fork (EV_P)
		820	{
		821	postfork = 1;
		822	}
		823
		824	#endif
		825
		826	#if EV_MULTIPLICITY
		827	struct ev_loop default_loop_struct;
		828	static struct ev_loop *default_loop;
		829
		830	struct ev_loop *
		831	#else
		832	static int default_loop;
		833
		834	int
		835	#endif
		836	ev_default_loop (int methods)
		837	{
		838	if (sigpipe [0] == sigpipe [1])
317	if (pipe (sigpipe))	839	if (pipe (sigpipe))
318	return 0;	840	return 0;
319		841
320	ev_method = EVMETHOD_NONE;	842	if (!default_loop)
321	#if HAVE_EPOLL	843	{
322	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	844	#if EV_MULTIPLICITY
		845	struct ev_loop *loop = default_loop = &default_loop_struct;
		846	#else
		847	default_loop = 1;
323	#endif	848	#endif
324	#if HAVE_SELECT
325	if (ev_method == EVMETHOD_NONE) select_init (flags);
326	#endif
327		849
		850	loop_init (EV_A_ methods);
		851
		852	if (ev_method (EV_A))
		853	{
		854	siginit (EV_A);
		855
		856	#ifndef WIN32
		857	ev_signal_init (&childev, childcb, SIGCHLD);
		858	ev_set_priority (&childev, EV_MAXPRI);
		859	ev_signal_start (EV_A_ &childev);
		860	ev_unref (EV_A); /* child watcher should not keep loop alive */
		861	#endif
		862	}
		863	else
		864	default_loop = 0;
		865	}
		866
		867	return default_loop;
		868	}
		869
		870	void
		871	ev_default_destroy (void)
		872	{
		873	#if EV_MULTIPLICITY
		874	struct ev_loop *loop = default_loop;
		875	#endif
		876
		877	#ifndef WIN32
		878	ev_ref (EV_A); /* child watcher */
		879	ev_signal_stop (EV_A_ &childev);
		880	#endif
		881
		882	ev_ref (EV_A); /* signal watcher */
		883	ev_io_stop (EV_A_ &sigev);
		884
		885	close (sigpipe [0]); sigpipe [0] = 0;
		886	close (sigpipe [1]); sigpipe [1] = 0;
		887
		888	loop_destroy (EV_A);
		889	}
		890
		891	void
		892	ev_default_fork (void)
		893	{
		894	#if EV_MULTIPLICITY
		895	struct ev_loop *loop = default_loop;
		896	#endif
		897
328	if (ev_method)	898	if (method)
329	{	899	postfork = 1;
330	evw_init (&sigev, sigcb, 0);
331	siginit ();
332	}
333
334	return ev_method;
335	}	900	}
336		901
337	/*****************************************************************************/	902	/*****************************************************************************/
338		903
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	904	static int
366	fd_reify (void)	905	any_pending (EV_P)
367	{	906	{
368	int i;	907	int pri;
369		908
370	for (i = 0; i < fdchangecnt; ++i)	909	for (pri = NUMPRI; pri--; )
371	{	910	if (pendingcnt [pri])
372	int fd = fdchanges [i];	911	return 1;
373	ANFD *anfd = anfds + fd;
374	struct ev_io *w;
375		912
376	int wev = 0;	913	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	}	914	}
390		915
391	static void	916	static void
392	call_pending ()	917	call_pending (EV_P)
393	{	918	{
394	int i;	919	int pri;
395		920
396	for (i = 0; i < pendingcnt; ++i)	921	for (pri = NUMPRI; pri--; )
		922	while (pendingcnt [pri])
397	{	923	{
398	ANPENDING *p = pendings + i;	924	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
399		925
400	if (p->w)	926	if (p->w)
401	{	927	{
402	p->w->pending = 0;	928	p->w->pending = 0;
403	p->w->cb (p->w, p->events);	929	p->w->cb (EV_A_ p->w, p->events);
404	}	930	}
405	}	931	}
406
407	pendingcnt = 0;
408	}	932	}
409		933
410	static void	934	static void
411	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	935	timers_reify (EV_P)
412	{	936	{
413	while (timercnt && timers [0]->at <= now)	937	while (timercnt && ((WT)timers [0])->at <= mn_now)
414	{	938	{
415	struct ev_timer *w = timers [0];	939	struct ev_timer *w = timers [0];
		940
		941	assert (("inactive timer on timer heap detected", ev_is_active (w)));
416		942
417	/* first reschedule or stop timer */	943	/* first reschedule or stop timer */
418	if (w->repeat)	944	if (w->repeat)
419	{	945	{
420	if (w->is_abs)	946	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;
422	else
423	w->at = now + w->repeat;	947	((WT)w)->at = mn_now + w->repeat;
424
425	assert (w->at > now);
426
427	downheap (timers, timercnt, 0);	948	downheap ((WT *)timers, timercnt, 0);
428	}	949	}
429	else	950	else
		951	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		952
		953	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		954	}
		955	}
		956
		957	static void
		958	periodics_reify (EV_P)
		959	{
		960	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
		961	{
		962	struct ev_periodic *w = periodics [0];
		963
		964	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		965
		966	/* first reschedule or stop timer */
		967	if (w->reschedule_cb)
430	{	968	{
431	evtimer_stop (w); /* nonrepeating: stop timer */	969	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001);
432	--timercnt; /* maybe pass by reference instead? */	970
		971	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));
		972	downheap ((WT *)periodics, periodiccnt, 0);
433	}	973	}
		974	else if (w->interval)
		975	{
		976	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
		977	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
		978	downheap ((WT *)periodics, periodiccnt, 0);
		979	}
		980	else
		981	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
434		982
435	event ((W)w, EV_TIMEOUT);	983	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
436	}	984	}
437	}	985	}
438		986
439	static void	987	static void
440	time_update ()	988	periodics_reschedule (EV_P)
441	{	989	{
442	int i;	990	int i;
		991
		992	/* adjust periodics after time jump */
		993	for (i = 0; i < periodiccnt; ++i)
		994	{
		995	struct ev_periodic *w = periodics [i];
		996
		997	if (w->reschedule_cb)
		998	((WT)w)->at = w->reschedule_cb (w, rt_now);
		999	else if (w->interval)
		1000	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1001	}
		1002
		1003	/* now rebuild the heap */
		1004	for (i = periodiccnt >> 1; i--; )
		1005	downheap ((WT *)periodics, periodiccnt, i);
		1006	}
		1007
		1008	inline int
		1009	time_update_monotonic (EV_P)
		1010	{
		1011	mn_now = get_clock ();
		1012
		1013	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1014	{
		1015	rt_now = rtmn_diff + mn_now;
		1016	return 0;
		1017	}
		1018	else
		1019	{
		1020	now_floor = mn_now;
443	ev_now = ev_time ();	1021	rt_now = ev_time ();
444		1022	return 1;
445	if (have_monotonic)
446	{	1023	}
447	ev_tstamp odiff = diff;	1024	}
448		1025
449	/* detecting time jumps is much more difficult */	1026	static void
450	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1027	time_update (EV_P)
		1028	{
		1029	int i;
		1030
		1031	#if EV_USE_MONOTONIC
		1032	if (expect_true (have_monotonic))
		1033	{
		1034	if (time_update_monotonic (EV_A))
451	{	1035	{
452	now = get_clock ();	1036	ev_tstamp odiff = rtmn_diff;
		1037
		1038	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1039	{
453	diff = ev_now - now;	1040	rtmn_diff = rt_now - mn_now;
454		1041
455	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1042	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
456	return; /* all is well */	1043	return; /* all is well */
457		1044
458	ev_now = ev_time ();	1045	rt_now = ev_time ();
		1046	mn_now = get_clock ();
		1047	now_floor = mn_now;
		1048	}
		1049
		1050	periodics_reschedule (EV_A);
		1051	/* no timer adjustment, as the monotonic clock doesn't jump */
		1052	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
459	}	1053	}
		1054	}
		1055	else
		1056	#endif
		1057	{
		1058	rt_now = ev_time ();
460		1059
461	/* time jump detected, reschedule atimers */	1060	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
462	for (i = 0; i < atimercnt; ++i)
463	{	1061	{
464	struct ev_timer *w = atimers [i];	1062	periodics_reschedule (EV_A);
465	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1063
		1064	/* adjust timers. this is easy, as the offset is the same for all */
		1065	for (i = 0; i < timercnt; ++i)
		1066	((WT)timers [i])->at += rt_now - mn_now;
466	}	1067	}
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		1068
475	now = ev_now;	1069	mn_now = rt_now;
476	}	1070	}
477	}	1071	}
478		1072
479	int ev_loop_done;	1073	void
		1074	ev_ref (EV_P)
		1075	{
		1076	++activecnt;
		1077	}
480		1078
		1079	void
		1080	ev_unref (EV_P)
		1081	{
		1082	--activecnt;
		1083	}
		1084
		1085	static int loop_done;
		1086
		1087	void
481	void ev_loop (int flags)	1088	ev_loop (EV_P_ int flags)
482	{	1089	{
483	double block;	1090	double block;
484	ev_loop_done = flags & EVLOOP_ONESHOT;	1091	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		1092
492	do	1093	do
493	{	1094	{
		1095	/* queue check watchers (and execute them) */
		1096	if (expect_false (preparecnt))
		1097	{
		1098	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1099	call_pending (EV_A);
		1100	}
		1101
		1102	/* we might have forked, so reify kernel state if necessary */
		1103	if (expect_false (postfork))
		1104	loop_fork (EV_A);
		1105
494	/* update fd-related kernel structures */	1106	/* update fd-related kernel structures */
495	fd_reify ();	1107	fd_reify (EV_A);
496		1108
497	/* calculate blocking time */	1109	/* calculate blocking time */
		1110
		1111	/* we only need this for !monotonic clock or timers, but as we basically
		1112	always have timers, we just calculate it always */
		1113	#if EV_USE_MONOTONIC
		1114	if (expect_true (have_monotonic))
		1115	time_update_monotonic (EV_A);
		1116	else
		1117	#endif
		1118	{
		1119	rt_now = ev_time ();
		1120	mn_now = rt_now;
		1121	}
		1122
498	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1123	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
499	block = 0.;	1124	block = 0.;
500	else	1125	else
501	{	1126	{
502	block = MAX_BLOCKTIME;	1127	block = MAX_BLOCKTIME;
503		1128
504	if (rtimercnt)	1129	if (timercnt)
505	{	1130	{
506	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1131	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
507	if (block > to) block = to;	1132	if (block > to) block = to;
508	}	1133	}
509		1134
510	if (atimercnt)	1135	if (periodiccnt)
511	{	1136	{
512	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1137	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
513	if (block > to) block = to;	1138	if (block > to) block = to;
514	}	1139	}
515		1140
516	if (block < 0.) block = 0.;	1141	if (block < 0.) block = 0.;
517	}	1142	}
518		1143
519	method_poll (block);	1144	method_poll (EV_A_ block);
520		1145
521	/* update ev_now, do magic */	1146	/* update rt_now, do magic */
522	time_update ();	1147	time_update (EV_A);
523		1148
524	/* queue pending timers and reschedule them */	1149	/* queue pending timers and reschedule them */
525	/* absolute timers first */	1150	timers_reify (EV_A); /* relative timers called last */
526	timers_reify (atimers, atimercnt, ev_now);	1151	periodics_reify (EV_A); /* absolute timers called first */
527	/* relative timers second */
528	timers_reify (rtimers, rtimercnt, now);
529		1152
530	/* queue idle watchers unless io or timers are pending */	1153	/* queue idle watchers unless io or timers are pending */
531	if (!pendingcnt)	1154	if (idlecnt && !any_pending (EV_A))
532	queue_events ((W *)idles, idlecnt, EV_IDLE);	1155	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
533		1156
534	/* queue check and possibly idle watchers */	1157	/* queue check watchers, to be executed first */
		1158	if (checkcnt)
535	queue_events ((W *)checks, checkcnt, EV_CHECK);	1159	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
536		1160
537	call_pending ();	1161	call_pending (EV_A);
538	}	1162	}
539	while (!ev_loop_done);	1163	while (activecnt && !loop_done);
		1164
		1165	if (loop_done != 2)
		1166	loop_done = 0;
		1167	}
		1168
		1169	void
		1170	ev_unloop (EV_P_ int how)
		1171	{
		1172	loop_done = how;
540	}	1173	}
541		1174
542	/*****************************************************************************/	1175	/*****************************************************************************/
543		1176
544	static void	1177	inline void
545	wlist_add (WL *head, WL elem)	1178	wlist_add (WL *head, WL elem)
546	{	1179	{
547	elem->next = *head;	1180	elem->next = *head;
548	*head = elem;	1181	*head = elem;
549	}	1182	}
550		1183
551	static void	1184	inline void
552	wlist_del (WL *head, WL elem)	1185	wlist_del (WL *head, WL elem)
553	{	1186	{
554	while (*head)	1187	while (*head)
555	{	1188	{
556	if (*head == elem)	1189	if (*head == elem)
561		1194
562	head = &(*head)->next;	1195	head = &(*head)->next;
563	}	1196	}
564	}	1197	}
565		1198
566	static void	1199	inline void
		1200	ev_clear_pending (EV_P_ W w)
		1201	{
		1202	if (w->pending)
		1203	{
		1204	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1205	w->pending = 0;
		1206	}
		1207	}
		1208
		1209	inline void
567	ev_start (W w, int active)	1210	ev_start (EV_P_ W w, int active)
568	{	1211	{
569	w->pending = 0;	1212	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1213	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1214
570	w->active = active;	1215	w->active = active;
		1216	ev_ref (EV_A);
571	}	1217	}
572		1218
573	static void	1219	inline void
574	ev_stop (W w)	1220	ev_stop (EV_P_ W w)
575	{	1221	{
576	if (w->pending)	1222	ev_unref (EV_A);
577	pendings [w->pending - 1].w = 0;
578
579	w->active = 0;	1223	w->active = 0;
580	}	1224	}
581		1225
582	/*****************************************************************************/	1226	/*****************************************************************************/
583		1227
584	void	1228	void
585	evio_start (struct ev_io *w)	1229	ev_io_start (EV_P_ struct ev_io *w)
586	{	1230	{
		1231	int fd = w->fd;
		1232
587	if (ev_is_active (w))	1233	if (ev_is_active (w))
588	return;	1234	return;
589		1235
590	int fd = w->fd;	1236	assert (("ev_io_start called with negative fd", fd >= 0));
591		1237
592	ev_start ((W)w, 1);	1238	ev_start (EV_A_ (W)w, 1);
593	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1239	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
594	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1240	wlist_add ((WL *)&anfds[fd].head, (WL)w);
595		1241
596	++fdchangecnt;	1242	fd_change (EV_A_ fd);
597	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
598	fdchanges [fdchangecnt - 1] = fd;
599	}	1243	}
600		1244
601	void	1245	void
602	evio_stop (struct ev_io *w)	1246	ev_io_stop (EV_P_ struct ev_io *w)
603	{	1247	{
		1248	ev_clear_pending (EV_A_ (W)w);
604	if (!ev_is_active (w))	1249	if (!ev_is_active (w))
605	return;	1250	return;
606		1251
607	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1252	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
608	ev_stop ((W)w);	1253	ev_stop (EV_A_ (W)w);
609		1254
610	++fdchangecnt;	1255	fd_change (EV_A_ w->fd);
611	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
612	fdchanges [fdchangecnt - 1] = w->fd;
613	}	1256	}
614		1257
615	void	1258	void
616	evtimer_start (struct ev_timer *w)	1259	ev_timer_start (EV_P_ struct ev_timer *w)
617	{	1260	{
618	if (ev_is_active (w))	1261	if (ev_is_active (w))
619	return;	1262	return;
620		1263
621	if (w->is_abs)	1264	((WT)w)->at += mn_now;
		1265
		1266	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1267
		1268	ev_start (EV_A_ (W)w, ++timercnt);
		1269	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
		1270	timers [timercnt - 1] = w;
		1271	upheap ((WT *)timers, timercnt - 1);
		1272
		1273	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1274	}
		1275
		1276	void
		1277	ev_timer_stop (EV_P_ struct ev_timer *w)
		1278	{
		1279	ev_clear_pending (EV_A_ (W)w);
		1280	if (!ev_is_active (w))
		1281	return;
		1282
		1283	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1284
		1285	if (((W)w)->active < timercnt--)
		1286	{
		1287	timers [((W)w)->active - 1] = timers [timercnt];
		1288	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
622	{	1289	}
623	/* this formula differs from the one in timer_reify becuse we do not round up */	1290
		1291	((WT)w)->at = w->repeat;
		1292
		1293	ev_stop (EV_A_ (W)w);
		1294	}
		1295
		1296	void
		1297	ev_timer_again (EV_P_ struct ev_timer *w)
		1298	{
		1299	if (ev_is_active (w))
		1300	{
624	if (w->repeat)	1301	if (w->repeat)
625	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1302	{
626		1303	((WT)w)->at = mn_now + w->repeat;
627	ev_start ((W)w, ++atimercnt);	1304	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
628	array_needsize (atimers, atimermax, atimercnt, );	1305	}
629	atimers [atimercnt - 1] = w;
630	upheap (atimers, atimercnt - 1);
631	}
632	else	1306	else
		1307	ev_timer_stop (EV_A_ w);
633	{	1308	}
634	w->at += now;	1309	else if (w->repeat)
		1310	ev_timer_start (EV_A_ w);
		1311	}
635		1312
636	ev_start ((W)w, ++rtimercnt);	1313	void
637	array_needsize (rtimers, rtimermax, rtimercnt, );	1314	ev_periodic_start (EV_P_ struct ev_periodic *w)
638	rtimers [rtimercnt - 1] = w;	1315	{
639	upheap (rtimers, rtimercnt - 1);	1316	if (ev_is_active (w))
		1317	return;
		1318
		1319	if (w->reschedule_cb)
		1320	((WT)w)->at = w->reschedule_cb (w, rt_now);
		1321	else if (w->interval)
640	}	1322	{
		1323	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1324	/* this formula differs from the one in periodic_reify because we do not always round up */
		1325	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1326	}
641		1327
642	}	1328	ev_start (EV_A_ (W)w, ++periodiccnt);
		1329	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
		1330	periodics [periodiccnt - 1] = w;
		1331	upheap ((WT *)periodics, periodiccnt - 1);
643		1332
		1333	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1334	}
		1335
644	void	1336	void
645	evtimer_stop (struct ev_timer *w)	1337	ev_periodic_stop (EV_P_ struct ev_periodic *w)
646	{	1338	{
		1339	ev_clear_pending (EV_A_ (W)w);
647	if (!ev_is_active (w))	1340	if (!ev_is_active (w))
648	return;	1341	return;
649		1342
650	if (w->is_abs)	1343	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
651	{	1344
652	if (w->active < atimercnt--)	1345	if (((W)w)->active < periodiccnt--)
653	{
654	atimers [w->active - 1] = atimers [atimercnt];
655	downheap (atimers, atimercnt, w->active - 1);
656	}
657	}	1346	{
658	else	1347	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1348	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
659	{	1349	}
660	if (w->active < rtimercnt--)
661	{
662	rtimers [w->active - 1] = rtimers [rtimercnt];
663	downheap (rtimers, rtimercnt, w->active - 1);
664	}
665	}
666		1350
667	ev_stop ((W)w);	1351	ev_stop (EV_A_ (W)w);
668	}	1352	}
669		1353
670	void	1354	void
671	evsignal_start (struct ev_signal *w)	1355	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1356	{
		1357	ev_periodic_stop (EV_A_ w);
		1358	ev_periodic_start (EV_A_ w);
		1359	}
		1360
		1361	void
		1362	ev_idle_start (EV_P_ struct ev_idle *w)
672	{	1363	{
673	if (ev_is_active (w))	1364	if (ev_is_active (w))
674	return;	1365	return;
675		1366
		1367	ev_start (EV_A_ (W)w, ++idlecnt);
		1368	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1369	idles [idlecnt - 1] = w;
		1370	}
		1371
		1372	void
		1373	ev_idle_stop (EV_P_ struct ev_idle *w)
		1374	{
		1375	ev_clear_pending (EV_A_ (W)w);
		1376	if (ev_is_active (w))
		1377	return;
		1378
		1379	idles [((W)w)->active - 1] = idles [--idlecnt];
		1380	ev_stop (EV_A_ (W)w);
		1381	}
		1382
		1383	void
		1384	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1385	{
		1386	if (ev_is_active (w))
		1387	return;
		1388
		1389	ev_start (EV_A_ (W)w, ++preparecnt);
		1390	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1391	prepares [preparecnt - 1] = w;
		1392	}
		1393
		1394	void
		1395	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1396	{
		1397	ev_clear_pending (EV_A_ (W)w);
		1398	if (ev_is_active (w))
		1399	return;
		1400
		1401	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1402	ev_stop (EV_A_ (W)w);
		1403	}
		1404
		1405	void
		1406	ev_check_start (EV_P_ struct ev_check *w)
		1407	{
		1408	if (ev_is_active (w))
		1409	return;
		1410
		1411	ev_start (EV_A_ (W)w, ++checkcnt);
		1412	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1413	checks [checkcnt - 1] = w;
		1414	}
		1415
		1416	void
		1417	ev_check_stop (EV_P_ struct ev_check *w)
		1418	{
		1419	ev_clear_pending (EV_A_ (W)w);
		1420	if (ev_is_active (w))
		1421	return;
		1422
		1423	checks [((W)w)->active - 1] = checks [--checkcnt];
		1424	ev_stop (EV_A_ (W)w);
		1425	}
		1426
		1427	#ifndef SA_RESTART
		1428	# define SA_RESTART 0
		1429	#endif
		1430
		1431	void
		1432	ev_signal_start (EV_P_ struct ev_signal *w)
		1433	{
		1434	#if EV_MULTIPLICITY
		1435	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1436	#endif
		1437	if (ev_is_active (w))
		1438	return;
		1439
		1440	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1441
676	ev_start ((W)w, 1);	1442	ev_start (EV_A_ (W)w, 1);
677	array_needsize (signals, signalmax, w->signum, signals_init);	1443	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
678	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1444	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
679		1445
680	if (!w->next)	1446	if (!((WL)w)->next)
681	{	1447	{
		1448	#if WIN32
		1449	signal (w->signum, sighandler);
		1450	#else
682	struct sigaction sa;	1451	struct sigaction sa;
683	sa.sa_handler = sighandler;	1452	sa.sa_handler = sighandler;
684	sigfillset (&sa.sa_mask);	1453	sigfillset (&sa.sa_mask);
685	sa.sa_flags = 0;	1454	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
686	sigaction (w->signum, &sa, 0);	1455	sigaction (w->signum, &sa, 0);
		1456	#endif
687	}	1457	}
688	}	1458	}
689		1459
690	void	1460	void
691	evsignal_stop (struct ev_signal *w)	1461	ev_signal_stop (EV_P_ struct ev_signal *w)
692	{	1462	{
		1463	ev_clear_pending (EV_A_ (W)w);
693	if (!ev_is_active (w))	1464	if (!ev_is_active (w))
694	return;	1465	return;
695		1466
696	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1467	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
697	ev_stop ((W)w);	1468	ev_stop (EV_A_ (W)w);
698		1469
699	if (!signals [w->signum - 1].head)	1470	if (!signals [w->signum - 1].head)
700	signal (w->signum, SIG_DFL);	1471	signal (w->signum, SIG_DFL);
701	}	1472	}
702		1473
703	void evidle_start (struct ev_idle *w)	1474	void
		1475	ev_child_start (EV_P_ struct ev_child *w)
704	{	1476	{
		1477	#if EV_MULTIPLICITY
		1478	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1479	#endif
705	if (ev_is_active (w))	1480	if (ev_is_active (w))
706	return;	1481	return;
707		1482
708	ev_start ((W)w, ++idlecnt);	1483	ev_start (EV_A_ (W)w, 1);
709	array_needsize (idles, idlemax, idlecnt, );	1484	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
710	idles [idlecnt - 1] = w;
711	}	1485	}
712		1486
713	void evidle_stop (struct ev_idle *w)	1487	void
		1488	ev_child_stop (EV_P_ struct ev_child *w)
714	{	1489	{
715	idles [w->active - 1] = idles [--idlecnt];	1490	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))	1491	if (ev_is_active (w))
722	return;	1492	return;
723		1493
724	ev_start ((W)w, ++checkcnt);	1494	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);	1495	ev_stop (EV_A_ (W)w);
733	}	1496	}
734		1497
735	/*****************************************************************************/	1498	/*****************************************************************************/
736		1499
737	#if 0	1500	struct ev_once
738
739	static void
740	sin_cb (struct ev_io *w, int revents)
741	{	1501	{
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;	1502	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;	1503	struct ev_timer to;
791	evw_init (&t1, ocb, 0);	1504	void (cb)(int revents, void arg);
792	evtimer_set_abs (&t1, 5, 10);	1505	void *arg;
793	evtimer_start (&t1);	1506	};
794		1507
795	struct ev_signal sig;	1508	static void
796	evw_init (&sig, scb, 65535);	1509	once_cb (EV_P_ struct ev_once *once, int revents)
797	evsignal_set (&sig, SIGQUIT);	1510	{
798	evsignal_start (&sig);	1511	void (cb)(int revents, void arg) = once->cb;
		1512	void *arg = once->arg;
799		1513
800	struct ev_check cw;	1514	ev_io_stop (EV_A_ &once->io);
801	evw_init (&cw, gcb, 0);	1515	ev_timer_stop (EV_A_ &once->to);
802	evcheck_start (&cw);	1516	ev_free (once);
803		1517
804	struct ev_idle iw;	1518	cb (revents, arg);
805	evw_init (&iw, gcb, 0);
806	evidle_start (&iw);
807
808	ev_loop (0);
809
810	return 0;
811	}	1519	}
812		1520
813	#endif	1521	static void
		1522	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1523	{
		1524	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1525	}
814		1526
		1527	static void
		1528	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1529	{
		1530	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1531	}
815		1532
		1533	void
		1534	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1535	{
		1536	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
816		1537
		1538	if (!once)
		1539	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1540	else
		1541	{
		1542	once->cb = cb;
		1543	once->arg = arg;
817		1544
		1545	ev_watcher_init (&once->io, once_cb_io);
		1546	if (fd >= 0)
		1547	{
		1548	ev_io_set (&once->io, fd, events);
		1549	ev_io_start (EV_A_ &once->io);
		1550	}
		1551
		1552	ev_watcher_init (&once->to, once_cb_to);
		1553	if (timeout >= 0.)
		1554	{
		1555	ev_timer_set (&once->to, timeout, 0.);
		1556	ev_timer_start (EV_A_ &once->to);
		1557	}
		1558	}
		1559	}
		1560

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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 1.78 by root, Thu Nov 8 21:08:56 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 1.78 by root, Thu Nov 8 21:08:56 2007 UTC