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

Comparing libev/ev.c (file contents):
Revision 1.8 by root, Wed Oct 31 00:32:33 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
		78	#ifndef EV_USE_MONOTONIC
		79	# define EV_USE_MONOTONIC 1
		80	#endif
		81
		82	#ifndef EV_USE_SELECT
		83	# define EV_USE_SELECT 1
		84	#endif
		85
		86	#ifndef EV_USE_POLL
		87	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		88	#endif
		89
		90	#ifndef EV_USE_EPOLL
		91	# define EV_USE_EPOLL 0
		92	#endif
		93
		94	#ifndef EV_USE_KQUEUE
		95	# define EV_USE_KQUEUE 0
		96	#endif
		97
		98	#ifndef EV_USE_WIN32
		99	# ifdef WIN32
		100	# define EV_USE_WIN32 0 /* it does not exist, use select */
		101	# undef EV_USE_SELECT
		102	# define EV_USE_SELECT 1
		103	# else
		104	# define EV_USE_WIN32 0
		105	# endif
		106	#endif
		107
		108	#ifndef EV_USE_REALTIME
		109	# define EV_USE_REALTIME 1
		110	#endif
		111
		112	/**/
		113
14	#ifdef CLOCK_MONOTONIC	114	#ifndef CLOCK_MONOTONIC
		115	# undef EV_USE_MONOTONIC
15	# define HAVE_MONOTONIC 1	116	# define EV_USE_MONOTONIC 0
16	#endif	117	#endif
17		118
		119	#ifndef CLOCK_REALTIME
		120	# undef EV_USE_REALTIME
18	#define HAVE_REALTIME 1	121	# define EV_USE_REALTIME 0
19	#define HAVE_EPOLL 1	122	#endif
20	#define HAVE_SELECT 1	123
		124	/**/
21		125
22	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	126	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
23	#define MAX_BLOCKTIME 60.	127	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		128	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		129	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
24		130
25	#include "ev.h"	131	#include "ev.h"
26		132
		133	#if __GNUC__ >= 3
		134	# define expect(expr,value) __builtin_expect ((expr),(value))
		135	# define inline inline
		136	#else
		137	# define expect(expr,value) (expr)
		138	# define inline static
		139	#endif
		140
		141	#define expect_false(expr) expect ((expr) != 0, 0)
		142	#define expect_true(expr) expect ((expr) != 0, 1)
		143
		144	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		145	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		146
27	struct ev_watcher {	147	typedef struct ev_watcher *W;
28	EV_WATCHER (ev_watcher);	148	typedef struct ev_watcher_list *WL;
		149	typedef struct ev_watcher_time *WT;
		150
		151	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		152
		153	#include "ev_win32.c"
		154
		155	/*****************************************************************************/
		156
		157	static void (syserr_cb)(const char msg);
		158
		159	void ev_set_syserr_cb (void (cb)(const char msg))
		160	{
		161	syserr_cb = cb;
		162	}
		163
		164	static void
		165	syserr (const char *msg)
		166	{
		167	if (!msg)
		168	msg = "(libev) system error";
		169
		170	if (syserr_cb)
		171	syserr_cb (msg);
		172	else
		173	{
		174	perror (msg);
		175	abort ();
		176	}
		177	}
		178
		179	static void (alloc)(void *ptr, long size);
		180
		181	void ev_set_allocator (void (cb)(void *ptr, long size))
		182	{
		183	alloc = cb;
		184	}
		185
		186	static void *
		187	ev_realloc (void *ptr, long size)
		188	{
		189	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		190
		191	if (!ptr && size)
		192	{
		193	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		194	abort ();
		195	}
		196
		197	return ptr;
		198	}
		199
		200	#define ev_malloc(size) ev_realloc (0, (size))
		201	#define ev_free(ptr) ev_realloc ((ptr), 0)
		202
		203	/*****************************************************************************/
		204
		205	typedef struct
		206	{
		207	WL head;
		208	unsigned char events;
		209	unsigned char reify;
		210	} ANFD;
		211
		212	typedef struct
		213	{
		214	W w;
		215	int events;
		216	} ANPENDING;
		217
		218	#if EV_MULTIPLICITY
		219
		220	struct ev_loop
		221	{
		222	# define VAR(name,decl) decl;
		223	# include "ev_vars.h"
29	};	224	};
		225	# undef VAR
		226	# include "ev_wrap.h"
30		227
31	struct ev_watcher_list {	228	#else
32	EV_WATCHER_LIST (ev_watcher_list);
33	};
34		229
35	static ev_tstamp now, diff; /* monotonic clock */	230	# define VAR(name,decl) static decl;
36	ev_tstamp ev_now;	231	# include "ev_vars.h"
37	int ev_method;	232	# undef VAR
38		233
39	static int have_monotonic; /* runtime */	234	#endif
40
41	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
42	static void (*method_modify)(int fd, int oev, int nev);
43	static void (*method_poll)(ev_tstamp timeout);
44		235
45	/*****************************************************************************/	236	/*****************************************************************************/
46		237
47	ev_tstamp	238	inline ev_tstamp
48	ev_time (void)	239	ev_time (void)
49	{	240	{
50	#if HAVE_REALTIME	241	#if EV_USE_REALTIME
51	struct timespec ts;	242	struct timespec ts;
52	clock_gettime (CLOCK_REALTIME, &ts);	243	clock_gettime (CLOCK_REALTIME, &ts);
53	return ts.tv_sec + ts.tv_nsec * 1e-9;	244	return ts.tv_sec + ts.tv_nsec * 1e-9;
54	#else	245	#else
55	struct timeval tv;	246	struct timeval tv;
56	gettimeofday (&tv, 0);	247	gettimeofday (&tv, 0);
57	return tv.tv_sec + tv.tv_usec * 1e-6;	248	return tv.tv_sec + tv.tv_usec * 1e-6;
58	#endif	249	#endif
59	}	250	}
60		251
61	static ev_tstamp	252	inline ev_tstamp
62	get_clock (void)	253	get_clock (void)
63	{	254	{
64	#if HAVE_MONOTONIC	255	#if EV_USE_MONOTONIC
65	if (have_monotonic)	256	if (expect_true (have_monotonic))
66	{	257	{
67	struct timespec ts;	258	struct timespec ts;
68	clock_gettime (CLOCK_MONOTONIC, &ts);	259	clock_gettime (CLOCK_MONOTONIC, &ts);
69	return ts.tv_sec + ts.tv_nsec * 1e-9;	260	return ts.tv_sec + ts.tv_nsec * 1e-9;
70	}	261	}
71	#endif	262	#endif
72		263
73	return ev_time ();	264	return ev_time ();
74	}	265	}
75		266
		267	ev_tstamp
		268	ev_now (EV_P)
		269	{
		270	return rt_now;
		271	}
		272
		273	#define array_roundsize(type,n) ((n) \| 4 & ~3)
		274
76	#define array_needsize(base,cur,cnt,init) \	275	#define array_needsize(type,base,cur,cnt,init) \
77	if ((cnt) > cur) \	276	if (expect_false ((cnt) > cur)) \
78	{ \	277	{ \
79	int newcnt = cur ? cur << 1 : 16; \	278	int newcnt = cur; \
80	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	279	do \
		280	{ \
		281	newcnt = array_roundsize (type, newcnt << 1); \
		282	} \
		283	while ((cnt) > newcnt); \
		284	\
81	base = realloc (base, sizeof (base) (newcnt)); \	285	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
82	init (base + cur, newcnt - cur); \	286	init (base + cur, newcnt - cur); \
83	cur = newcnt; \	287	cur = newcnt; \
84	}	288	}
		289
		290	#define array_slim(type,stem) \
		291	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		292	{ \
		293	stem ## max = array_roundsize (stem ## cnt >> 1); \
		294	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
		295	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		296	}
		297
		298	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		299	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		300	#define array_free_microshit(stem) \
		301	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		302
		303	#define array_free(stem, idx) \
		304	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
85		305
86	/*****************************************************************************/	306	/*****************************************************************************/
87		307
88	typedef struct
89	{
90	struct ev_io *head;
91	unsigned char wev, rev; /* want, received event set */
92	} ANFD;
93
94	static ANFD *anfds;
95	static int anfdmax;
96
97	static int *fdchanges;
98	static int fdchangemax, fdchangecnt;
99
100	static void	308	static void
101	anfds_init (ANFD *base, int count)	309	anfds_init (ANFD *base, int count)
102	{	310	{
103	while (count--)	311	while (count--)
104	{	312	{
105	base->head = 0;	313	base->head = 0;
106	base->wev = base->rev = EV_NONE;	314	base->events = EV_NONE;
		315	base->reify = 0;
		316
107	++base;	317	++base;
108	}	318	}
109	}	319	}
110		320
111	typedef struct	321	void
		322	ev_feed_event (EV_P_ void *w, int revents)
112	{	323	{
113	struct ev_watcher *w;	324	W w_ = (W)w;
114	int events;
115	} ANPENDING;
116		325
117	static ANPENDING *pendings;	326	if (w_->pending)
118	static int pendingmax, pendingcnt;	327	{
		328	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		329	return;
		330	}
119		331
120	static void
121	event (struct ev_watcher *w, int events)
122	{
123	w->pending = ++pendingcnt;	332	w_->pending = ++pendingcnt [ABSPRI (w_)];
124	array_needsize (pendings, pendingmax, pendingcnt, );	333	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
125	pendings [pendingcnt - 1].w = w;	334	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
126	pendings [pendingcnt - 1].events = events;	335	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
127	}	336	}
128		337
129	static void	338	static void
		339	queue_events (EV_P_ W *events, int eventcnt, int type)
		340	{
		341	int i;
		342
		343	for (i = 0; i < eventcnt; ++i)
		344	ev_feed_event (EV_A_ events [i], type);
		345	}
		346
		347	static void
130	fd_event (int fd, int events)	348	fd_event (EV_P_ int fd, int events)
131	{	349	{
132	ANFD *anfd = anfds + fd;	350	ANFD *anfd = anfds + fd;
133	struct ev_io *w;	351	struct ev_io *w;
134		352
135	for (w = anfd->head; w; w = w->next)	353	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
136	{	354	{
137	int ev = w->events & events;	355	int ev = w->events & events;
138		356
139	if (ev)	357	if (ev)
140	event ((struct ev_watcher *)w, ev);	358	ev_feed_event (EV_A_ (W)w, ev);
141	}	359	}
142	}	360	}
143		361
144	/*****************************************************************************/	362	/*****************************************************************************/
145		363
146	static struct ev_timer **atimers;	364	static void
147	static int atimermax, atimercnt;	365	fd_reify (EV_P)
		366	{
		367	int i;
148		368
149	static struct ev_timer **rtimers;	369	for (i = 0; i < fdchangecnt; ++i)
150	static int rtimermax, rtimercnt;	370	{
		371	int fd = fdchanges [i];
		372	ANFD *anfd = anfds + fd;
		373	struct ev_io *w;
151		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
152	static void	414	static int
153	upheap (struct ev_timer **timers, int k)	415	fd_valid (int fd)
154	{	416	{
155	struct ev_timer *w = timers [k];	417	#ifdef WIN32
		418	return !!win32_get_osfhandle (fd);
		419	#else
		420	return fcntl (fd, F_GETFD) != -1;
		421	#endif
		422	}
156		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	}
		463	}
		464
		465	/*****************************************************************************/
		466
		467	static void
		468	upheap (WT *heap, int k)
		469	{
		470	WT w = heap [k];
		471
157	while (k && timers [k >> 1]->at > w->at)	472	while (k && heap [k >> 1]->at > w->at)
158	{	473	{
159	timers [k] = timers [k >> 1];	474	heap [k] = heap [k >> 1];
160	timers [k]->active = k + 1;	475	((W)heap [k])->active = k + 1;
161	k >>= 1;	476	k >>= 1;
162	}	477	}
163		478
164	timers [k] = w;	479	heap [k] = w;
165	timers [k]->active = k + 1;	480	((W)heap [k])->active = k + 1;
166		481
167	}	482	}
168		483
169	static void	484	static void
170	downheap (struct ev_timer **timers, int N, int k)	485	downheap (WT *heap, int N, int k)
171	{	486	{
172	struct ev_timer *w = timers [k];	487	WT w = heap [k];
173		488
174	while (k < (N >> 1))	489	while (k < (N >> 1))
175	{	490	{
176	int j = k << 1;	491	int j = k << 1;
177		492
178	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	493	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
179	++j;	494	++j;
180		495
181	if (w->at <= timers [j]->at)	496	if (w->at <= heap [j]->at)
182	break;	497	break;
183		498
184	timers [k] = timers [j];	499	heap [k] = heap [j];
185	timers [k]->active = k + 1;	500	((W)heap [k])->active = k + 1;
186	k = j;	501	k = j;
187	}	502	}
188		503
189	timers [k] = w;	504	heap [k] = w;
190	timers [k]->active = k + 1;	505	((W)heap [k])->active = k + 1;
191	}	506	}
192		507
193	/*****************************************************************************/	508	/*****************************************************************************/
194		509
195	typedef struct	510	typedef struct
196	{	511	{
197	struct ev_signal *head;	512	WL head;
198	sig_atomic_t gotsig;	513	sig_atomic_t volatile gotsig;
199	} ANSIG;	514	} ANSIG;
200		515
201	static ANSIG *signals;	516	static ANSIG *signals;
202	static int signalmax;	517	static int signalmax;
203		518
204	static int sigpipe [2];	519	static int sigpipe [2];
205	static sig_atomic_t gotsig;	520	static sig_atomic_t volatile gotsig;
206	static struct ev_io sigev;	521	static struct ev_io sigev;
207		522
208	static void	523	static void
209	signals_init (ANSIG *base, int count)	524	signals_init (ANSIG *base, int count)
210	{	525	{
211	while (count--)	526	while (count--)
212	{	527	{
213	base->head = 0;	528	base->head = 0;
214	base->gotsig = 0;	529	base->gotsig = 0;
		530
215	++base;	531	++base;
216	}	532	}
217	}	533	}
218		534
219	static void	535	static void
220	sighandler (int signum)	536	sighandler (int signum)
221	{	537	{
		538	#if WIN32
		539	signal (signum, sighandler);
		540	#endif
		541
222	signals [signum - 1].gotsig = 1;	542	signals [signum - 1].gotsig = 1;
223		543
224	if (!gotsig)	544	if (!gotsig)
225	{	545	{
		546	int old_errno = errno;
226	gotsig = 1;	547	gotsig = 1;
		548	#ifdef WIN32
		549	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		550	#else
227	write (sigpipe [1], &gotsig, 1);	551	write (sigpipe [1], &signum, 1);
		552	#endif
		553	errno = old_errno;
228	}	554	}
229	}	555	}
230		556
231	static void	557	static void
232	sigcb (struct ev_io *iow, int revents)	558	sigcb (EV_P_ struct ev_io *iow, int revents)
233	{	559	{
234	struct ev_signal *w;	560	WL w;
235	int sig;	561	int signum;
236		562
		563	#ifdef WIN32
		564	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		565	#else
		566	read (sigpipe [0], &revents, 1);
		567	#endif
237	gotsig = 0;	568	gotsig = 0;
238	read (sigpipe [0], &revents, 1);
239		569
240	for (sig = signalmax; sig--; )	570	for (signum = signalmax; signum--; )
241	if (signals [sig].gotsig)	571	if (signals [signum].gotsig)
242	{	572	{
243	signals [sig].gotsig = 0;	573	signals [signum].gotsig = 0;
244		574
245	for (w = signals [sig].head; w; w = w->next)	575	for (w = signals [signum].head; w; w = w->next)
246	event ((struct ev_watcher *)w, EV_SIGNAL);	576	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
247	}	577	}
248	}	578	}
249		579
250	static void	580	static void
251	siginit (void)	581	siginit (EV_P)
252	{	582	{
		583	#ifndef WIN32
253	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	584	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
254	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	585	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
255		586
256	/* rather than sort out wether we really need nb, set it */	587	/* rather than sort out wether we really need nb, set it */
257	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	588	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
258	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	589	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		590	#endif
259		591
260	evio_set (&sigev, sigpipe [0], EV_READ);	592	ev_io_set (&sigev, sigpipe [0], EV_READ);
261	evio_start (&sigev);	593	ev_io_start (EV_A_ &sigev);
		594	ev_unref (EV_A); /* child watcher should not keep loop alive */
262	}	595	}
263		596
264	/*****************************************************************************/	597	/*****************************************************************************/
265		598
		599	static struct ev_child *childs [PID_HASHSIZE];
		600
		601	#ifndef WIN32
		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
		640
		641	/*****************************************************************************/
		642
		643	#if EV_USE_KQUEUE
		644	# include "ev_kqueue.c"
		645	#endif
266	#if HAVE_EPOLL	646	#if EV_USE_EPOLL
267	# include "ev_epoll.c"	647	# include "ev_epoll.c"
268	#endif	648	#endif
		649	#if EV_USE_POLL
		650	# include "ev_poll.c"
		651	#endif
269	#if HAVE_SELECT	652	#if EV_USE_SELECT
270	# include "ev_select.c"	653	# include "ev_select.c"
271	#endif	654	#endif
272		655
273	int ev_init (int flags)	656	int
		657	ev_version_major (void)
274	{	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	{
275	#if HAVE_MONOTONIC	691	#if EV_USE_MONOTONIC
276	{	692	{
277	struct timespec ts;	693	struct timespec ts;
278	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	694	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
279	have_monotonic = 1;	695	have_monotonic = 1;
280	}	696	}
281	#endif	697	#endif
282		698
283	ev_now = ev_time ();	699	rt_now = ev_time ();
284	now = get_clock ();	700	mn_now = get_clock ();
285	diff = ev_now - now;	701	now_floor = mn_now;
		702	rtmn_diff = rt_now - mn_now;
286		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])
287	if (pipe (sigpipe))	839	if (pipe (sigpipe))
288	return 0;	840	return 0;
289		841
290	ev_method = EVMETHOD_NONE;	842	if (!default_loop)
291	#if HAVE_EPOLL	843	{
292	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;
293	#endif	848	#endif
294	#if HAVE_SELECT
295	if (ev_method == EVMETHOD_NONE) select_init (flags);
296	#endif
297		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
298	if (ev_method)	898	if (method)
299	{	899	postfork = 1;
300	evw_init (&sigev, sigcb, 0);
301	siginit ();
302	}
303
304	return ev_method;
305	}	900	}
306		901
307	/*****************************************************************************/	902	/*****************************************************************************/
308		903
309	void ev_prefork (void)
310	{
311	}
312
313	void ev_postfork_parent (void)
314	{
315	}
316
317	void ev_postfork_child (void)
318	{
319	#if HAVE_EPOLL
320	if (ev_method == EVMETHOD_EPOLL)
321	epoll_postfork_child ();
322	#endif
323
324	evio_stop (&sigev);
325	close (sigpipe [0]);
326	close (sigpipe [1]);
327	pipe (sigpipe);
328	siginit ();
329	}
330
331	/*****************************************************************************/
332
333	static ev_hook hooks [EVHOOK_NUM];
334
335	void
336	ev_hook_register (int type, ev_hook hook)
337	{
338	hooks [type] = hook;
339	}
340
341	void
342	ev_hook_unregister (int type, ev_hook hook)
343	{
344	hooks [type] = 0;
345	}
346
347	static void	904	static int
348	hook_call (int type)	905	any_pending (EV_P)
349	{	906	{
350	if (hooks [type])
351	hooks [type] ();
352	}
353
354	static void
355	fd_reify (void)
356	{
357	int i;	907	int pri;
358		908
359	for (i = 0; i < fdchangecnt; ++i)	909	for (pri = NUMPRI; pri--; )
360	{	910	if (pendingcnt [pri])
361	int fd = fdchanges [i];	911	return 1;
362	ANFD *anfd = anfds + fd;
363	struct ev_io *w;
364		912
365	int wev = 0;	913	return 0;
366
367	for (w = anfd->head; w; w = w->next)
368	wev \|= w->events;
369
370	if (anfd->wev != wev)
371	{
372	method_modify (fd, anfd->wev, wev);
373	anfd->wev = wev;
374	}
375	}
376
377	fdchangecnt = 0;
378	}	914	}
379		915
380	static void	916	static void
381	call_pending ()	917	call_pending (EV_P)
382	{	918	{
383	int i;	919	int pri;
384		920
385	for (i = 0; i < pendingcnt; ++i)	921	for (pri = NUMPRI; pri--; )
		922	while (pendingcnt [pri])
386	{	923	{
387	ANPENDING *p = pendings + i;	924	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
388		925
389	if (p->w)	926	if (p->w)
390	{	927	{
391	p->w->pending = 0;	928	p->w->pending = 0;
392	p->w->cb (p->w, p->events);	929	p->w->cb (EV_A_ p->w, p->events);
393	}	930	}
394	}	931	}
395
396	pendingcnt = 0;
397	}	932	}
398		933
399	static void	934	static void
400	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	935	timers_reify (EV_P)
401	{	936	{
402	while (timercnt && timers [0]->at <= now)	937	while (timercnt && ((WT)timers [0])->at <= mn_now)
403	{	938	{
404	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)));
405		942
406	/* first reschedule or stop timer */	943	/* first reschedule or stop timer */
407	if (w->repeat)	944	if (w->repeat)
408	{	945	{
409	if (w->is_abs)	946	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
410	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
411	else
412	w->at = now + w->repeat;	947	((WT)w)->at = mn_now + w->repeat;
413
414	assert (w->at > now);
415
416	downheap (timers, timercnt, 0);	948	downheap ((WT *)timers, timercnt, 0);
417	}	949	}
418	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)
419	{	968	{
420	evtimer_stop (w); /* nonrepeating: stop timer */	969	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001);
421	--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);
422	}	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 */
423		982
424	event ((struct ev_watcher *)w, EV_TIMEOUT);	983	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
425	}	984	}
426	}	985	}
427		986
428	static void	987	static void
429	time_update ()	988	periodics_reschedule (EV_P)
430	{	989	{
431	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;
432	ev_now = ev_time ();	1021	rt_now = ev_time ();
433		1022	return 1;
434	if (have_monotonic)
435	{	1023	}
436	ev_tstamp odiff = diff;	1024	}
437		1025
438	/* detecting time jumps is much more difficult */	1026	static void
439	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))
440	{	1035	{
441	now = get_clock ();	1036	ev_tstamp odiff = rtmn_diff;
		1037
		1038	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1039	{
442	diff = ev_now - now;	1040	rtmn_diff = rt_now - mn_now;
443		1041
444	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1042	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
445	return; /* all is well */	1043	return; /* all is well */
446		1044
447	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) */
448	}	1053	}
		1054	}
		1055	else
		1056	#endif
		1057	{
		1058	rt_now = ev_time ();
449		1059
450	/* time jump detected, reschedule atimers */	1060	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
451	for (i = 0; i < atimercnt; ++i)
452	{	1061	{
453	struct ev_timer *w = atimers [i];	1062	periodics_reschedule (EV_A);
454	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;
455	}	1067	}
456	}
457	else
458	{
459	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
460	/* time jump detected, adjust rtimers */
461	for (i = 0; i < rtimercnt; ++i)
462	rtimers [i]->at += ev_now - now;
463		1068
464	now = ev_now;	1069	mn_now = rt_now;
465	}	1070	}
466	}	1071	}
467		1072
468	int ev_loop_done;	1073	void
		1074	ev_ref (EV_P)
		1075	{
		1076	++activecnt;
		1077	}
469		1078
		1079	void
		1080	ev_unref (EV_P)
		1081	{
		1082	--activecnt;
		1083	}
		1084
		1085	static int loop_done;
		1086
		1087	void
470	void ev_loop (int flags)	1088	ev_loop (EV_P_ int flags)
471	{	1089	{
472	double block;	1090	double block;
473	ev_loop_done = flags & EVLOOP_ONESHOT;	1091	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
474		1092
475	do	1093	do
476	{	1094	{
477	hook_call (EVHOOK_PREPOLL);	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);
478		1105
479	/* update fd-related kernel structures */	1106	/* update fd-related kernel structures */
480	fd_reify ();	1107	fd_reify (EV_A);
481		1108
482	/* 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
483	if (flags & EVLOOP_NONBLOCK)	1123	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
484	block = 0.;	1124	block = 0.;
485	else	1125	else
486	{	1126	{
487	block = MAX_BLOCKTIME;	1127	block = MAX_BLOCKTIME;
488		1128
489	if (rtimercnt)	1129	if (timercnt)
490	{	1130	{
491	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1131	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
492	if (block > to) block = to;	1132	if (block > to) block = to;
493	}	1133	}
494		1134
495	if (atimercnt)	1135	if (periodiccnt)
496	{	1136	{
497	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1137	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
498	if (block > to) block = to;	1138	if (block > to) block = to;
499	}	1139	}
500		1140
501	if (block < 0.) block = 0.;	1141	if (block < 0.) block = 0.;
502	}	1142	}
503		1143
504	method_poll (block);	1144	method_poll (EV_A_ block);
505		1145
506	/* update ev_now, do magic */	1146	/* update rt_now, do magic */
507	time_update ();	1147	time_update (EV_A);
508		1148
509	hook_call (EVHOOK_POSTPOLL);
510
511	/* put pending timers into pendign queue and reschedule them */	1149	/* queue pending timers and reschedule them */
512	/* absolute timers first */	1150	timers_reify (EV_A); /* relative timers called last */
513	timers_reify (atimers, atimercnt, ev_now);	1151	periodics_reify (EV_A); /* absolute timers called first */
514	/* relative timers second */
515	timers_reify (rtimers, rtimercnt, now);
516		1152
		1153	/* queue idle watchers unless io or timers are pending */
		1154	if (idlecnt && !any_pending (EV_A))
		1155	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		1156
		1157	/* queue check watchers, to be executed first */
		1158	if (checkcnt)
		1159	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1160
517	call_pending ();	1161	call_pending (EV_A);
518	}	1162	}
519	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;
520	}	1173	}
521		1174
522	/*****************************************************************************/	1175	/*****************************************************************************/
523		1176
524	static void	1177	inline void
525	wlist_add (struct ev_watcher_list *head, struct ev_watcher_list elem)	1178	wlist_add (WL *head, WL elem)
526	{	1179	{
527	elem->next = *head;	1180	elem->next = *head;
528	*head = elem;	1181	*head = elem;
529	}	1182	}
530		1183
531	static void	1184	inline void
532	wlist_del (struct ev_watcher_list *head, struct ev_watcher_list elem)	1185	wlist_del (WL *head, WL elem)
533	{	1186	{
534	while (*head)	1187	while (*head)
535	{	1188	{
536	if (*head == elem)	1189	if (*head == elem)
537	{	1190	{
541		1194
542	head = &(*head)->next;	1195	head = &(*head)->next;
543	}	1196	}
544	}	1197	}
545		1198
546	static void	1199	inline void
547	ev_start (struct ev_watcher *w, int active)	1200	ev_clear_pending (EV_P_ W w)
548	{	1201	{
		1202	if (w->pending)
		1203	{
		1204	pendings [ABSPRI (w)][w->pending - 1].w = 0;
549	w->pending = 0;	1205	w->pending = 0;
		1206	}
		1207	}
		1208
		1209	inline void
		1210	ev_start (EV_P_ W w, int active)
		1211	{
		1212	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1213	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1214
550	w->active = active;	1215	w->active = active;
		1216	ev_ref (EV_A);
551	}	1217	}
552		1218
553	static void	1219	inline void
554	ev_stop (struct ev_watcher *w)	1220	ev_stop (EV_P_ W w)
555	{	1221	{
556	if (w->pending)	1222	ev_unref (EV_A);
557	pendings [w->pending - 1].w = 0;
558
559	w->active = 0;	1223	w->active = 0;
560	/* nop */
561	}	1224	}
562		1225
563	/*****************************************************************************/	1226	/*****************************************************************************/
564		1227
565	void	1228	void
566	evio_start (struct ev_io *w)	1229	ev_io_start (EV_P_ struct ev_io *w)
567	{	1230	{
		1231	int fd = w->fd;
		1232
568	if (ev_is_active (w))	1233	if (ev_is_active (w))
569	return;	1234	return;
570		1235
571	int fd = w->fd;	1236	assert (("ev_io_start called with negative fd", fd >= 0));
572		1237
573	ev_start ((struct ev_watcher *)w, 1);	1238	ev_start (EV_A_ (W)w, 1);
574	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1239	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
575	wlist_add ((struct ev_watcher_list *)&anfds[fd].head, (struct ev_watcher_list )w);	1240	wlist_add ((WL *)&anfds[fd].head, (WL)w);
576		1241
577	++fdchangecnt;	1242	fd_change (EV_A_ fd);
578	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
579	fdchanges [fdchangecnt - 1] = fd;
580	}	1243	}
581		1244
582	void	1245	void
583	evio_stop (struct ev_io *w)	1246	ev_io_stop (EV_P_ struct ev_io *w)
584	{	1247	{
		1248	ev_clear_pending (EV_A_ (W)w);
585	if (!ev_is_active (w))	1249	if (!ev_is_active (w))
586	return;	1250	return;
587		1251
588	wlist_del ((struct ev_watcher_list *)&anfds[w->fd].head, (struct ev_watcher_list )w);	1252	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
589	ev_stop ((struct ev_watcher *)w);	1253	ev_stop (EV_A_ (W)w);
590		1254
591	++fdchangecnt;	1255	fd_change (EV_A_ w->fd);
592	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
593	fdchanges [fdchangecnt - 1] = w->fd;
594	}	1256	}
595		1257
596	void	1258	void
597	evtimer_start (struct ev_timer *w)	1259	ev_timer_start (EV_P_ struct ev_timer *w)
598	{	1260	{
599	if (ev_is_active (w))	1261	if (ev_is_active (w))
600	return;	1262	return;
601		1263
602	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);
603	{	1289	}
604	/* 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	{
605	if (w->repeat)	1301	if (w->repeat)
606	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1302	{
607		1303	((WT)w)->at = mn_now + w->repeat;
608	ev_start ((struct ev_watcher *)w, ++atimercnt);	1304	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
609	array_needsize (atimers, atimermax, atimercnt, );	1305	}
610	atimers [atimercnt - 1] = w;
611	upheap (atimers, atimercnt - 1);
612	}
613	else	1306	else
		1307	ev_timer_stop (EV_A_ w);
614	{	1308	}
615	w->at += now;	1309	else if (w->repeat)
		1310	ev_timer_start (EV_A_ w);
		1311	}
616		1312
617	ev_start ((struct ev_watcher *)w, ++rtimercnt);	1313	void
618	array_needsize (rtimers, rtimermax, rtimercnt, );	1314	ev_periodic_start (EV_P_ struct ev_periodic *w)
619	rtimers [rtimercnt - 1] = w;	1315	{
620	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)
621	}	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	}
622		1327
623	}	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);
624		1332
		1333	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1334	}
		1335
625	void	1336	void
626	evtimer_stop (struct ev_timer *w)	1337	ev_periodic_stop (EV_P_ struct ev_periodic *w)
627	{	1338	{
		1339	ev_clear_pending (EV_A_ (W)w);
628	if (!ev_is_active (w))	1340	if (!ev_is_active (w))
629	return;	1341	return;
630		1342
631	if (w->is_abs)	1343	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
632	{	1344
633	if (w->active < atimercnt--)	1345	if (((W)w)->active < periodiccnt--)
634	{
635	atimers [w->active - 1] = atimers [atimercnt];
636	downheap (atimers, atimercnt, w->active - 1);
637	}
638	}	1346	{
639	else	1347	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1348	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
640	{	1349	}
641	if (w->active < rtimercnt--)
642	{
643	rtimers [w->active - 1] = rtimers [rtimercnt];
644	downheap (rtimers, rtimercnt, w->active - 1);
645	}
646	}
647		1350
648	ev_stop ((struct ev_watcher *)w);	1351	ev_stop (EV_A_ (W)w);
649	}	1352	}
650		1353
651	void	1354	void
652	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)
653	{	1363	{
654	if (ev_is_active (w))	1364	if (ev_is_active (w))
655	return;	1365	return;
656		1366
657	ev_start ((struct ev_watcher *)w, 1);	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
		1442	ev_start (EV_A_ (W)w, 1);
658	array_needsize (signals, signalmax, w->signum, signals_init);	1443	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
659	wlist_add ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	1444	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
660		1445
661	if (!w->next)	1446	if (!((WL)w)->next)
662	{	1447	{
		1448	#if WIN32
		1449	signal (w->signum, sighandler);
		1450	#else
663	struct sigaction sa;	1451	struct sigaction sa;
664	sa.sa_handler = sighandler;	1452	sa.sa_handler = sighandler;
665	sigfillset (&sa.sa_mask);	1453	sigfillset (&sa.sa_mask);
666	sa.sa_flags = 0;	1454	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
667	sigaction (w->signum, &sa, 0);	1455	sigaction (w->signum, &sa, 0);
		1456	#endif
668	}	1457	}
669	}	1458	}
670		1459
671	void	1460	void
672	evsignal_stop (struct ev_signal *w)	1461	ev_signal_stop (EV_P_ struct ev_signal *w)
673	{	1462	{
		1463	ev_clear_pending (EV_A_ (W)w);
674	if (!ev_is_active (w))	1464	if (!ev_is_active (w))
675	return;	1465	return;
676		1466
677	wlist_del ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	1467	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
678	ev_stop ((struct ev_watcher *)w);	1468	ev_stop (EV_A_ (W)w);
679		1469
680	if (!signals [w->signum - 1].head)	1470	if (!signals [w->signum - 1].head)
681	signal (w->signum, SIG_DFL);	1471	signal (w->signum, SIG_DFL);
682	}	1472	}
683		1473
		1474	void
		1475	ev_child_start (EV_P_ struct ev_child *w)
		1476	{
		1477	#if EV_MULTIPLICITY
		1478	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1479	#endif
		1480	if (ev_is_active (w))
		1481	return;
		1482
		1483	ev_start (EV_A_ (W)w, 1);
		1484	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1485	}
		1486
		1487	void
		1488	ev_child_stop (EV_P_ struct ev_child *w)
		1489	{
		1490	ev_clear_pending (EV_A_ (W)w);
		1491	if (ev_is_active (w))
		1492	return;
		1493
		1494	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1495	ev_stop (EV_A_ (W)w);
		1496	}
		1497
684	/*****************************************************************************/	1498	/*****************************************************************************/
685	#if 1
686		1499
687	static void	1500	struct ev_once
688	sin_cb (struct ev_io *w, int revents)
689	{	1501	{
690	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
691	}
692
693	static void
694	ocb (struct ev_timer *w, int revents)
695	{
696	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
697	evtimer_stop (w);
698	evtimer_start (w);
699	}
700
701	static void
702	scb (struct ev_signal *w, int revents)
703	{
704	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
705	}
706
707	int main (void)
708	{
709	struct ev_io sin;	1502	struct ev_io io;
710
711	ev_init (0);
712
713	evw_init (&sin, sin_cb, 55);
714	evio_set (&sin, 0, EV_READ);
715	evio_start (&sin);
716
717	struct ev_timer t[10000];
718
719	#if 1
720	int i;
721	for (i = 0; i < 10000; ++i)
722	{
723	struct ev_timer *w = t + i;
724	evw_init (w, ocb, i);
725	evtimer_set_abs (w, drand48 (), 0.99775533);
726	evtimer_start (w);
727	if (drand48 () < 0.5)
728	evtimer_stop (w);
729	}
730	#endif
731
732	struct ev_timer t1;	1503	struct ev_timer to;
733	evw_init (&t1, ocb, 0);	1504	void (cb)(int revents, void arg);
734	evtimer_set_abs (&t1, 5, 10);	1505	void *arg;
735	evtimer_start (&t1);	1506	};
736		1507
737	struct ev_signal sig;	1508	static void
738	evw_init (&sig, scb, 65535);	1509	once_cb (EV_P_ struct ev_once *once, int revents)
739	evsignal_set (&sig, SIGQUIT);	1510	{
740	evsignal_start (&sig);	1511	void (cb)(int revents, void arg) = once->cb;
		1512	void *arg = once->arg;
741		1513
742	ev_loop (0);	1514	ev_io_stop (EV_A_ &once->io);
		1515	ev_timer_stop (EV_A_ &once->to);
		1516	ev_free (once);
743		1517
744	return 0;	1518	cb (revents, arg);
745	}	1519	}
746		1520
747	#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	}
748		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	}
749		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));
750		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;
751		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 1.8 by root, Wed Oct 31 00:32:33 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 1.8 by root, Wed Oct 31 00:32:33 2007 UTC vs.
Revision 1.78 by root, Thu Nov 8 21:08:56 2007 UTC