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

Comparing libev/ev.c (file contents):
Revision 1.7 by root, Wed Oct 31 00:24:16 2007 UTC vs.
Revision 1.79 by root, Fri Nov 9 15:15:20 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		235
41	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	236	/*****************************************************************************/
42	static void (*method_modify)(int fd, int oev, int nev);
43	static void (*method_poll)(ev_tstamp timeout);
44		237
45	ev_tstamp	238	inline ev_tstamp
46	ev_time (void)	239	ev_time (void)
47	{	240	{
48	#if HAVE_REALTIME	241	#if EV_USE_REALTIME
49	struct timespec ts;	242	struct timespec ts;
50	clock_gettime (CLOCK_REALTIME, &ts);	243	clock_gettime (CLOCK_REALTIME, &ts);
51	return ts.tv_sec + ts.tv_nsec * 1e-9;	244	return ts.tv_sec + ts.tv_nsec * 1e-9;
52	#else	245	#else
53	struct timeval tv;	246	struct timeval tv;
54	gettimeofday (&tv, 0);	247	gettimeofday (&tv, 0);
55	return tv.tv_sec + tv.tv_usec * 1e-6;	248	return tv.tv_sec + tv.tv_usec * 1e-6;
56	#endif	249	#endif
57	}	250	}
58		251
59	static ev_tstamp	252	inline ev_tstamp
60	get_clock (void)	253	get_clock (void)
61	{	254	{
62	#if HAVE_MONOTONIC	255	#if EV_USE_MONOTONIC
63	if (have_monotonic)	256	if (expect_true (have_monotonic))
64	{	257	{
65	struct timespec ts;	258	struct timespec ts;
66	clock_gettime (CLOCK_MONOTONIC, &ts);	259	clock_gettime (CLOCK_MONOTONIC, &ts);
67	return ts.tv_sec + ts.tv_nsec * 1e-9;	260	return ts.tv_sec + ts.tv_nsec * 1e-9;
68	}	261	}
69	#endif	262	#endif
70		263
71	return ev_time ();	264	return ev_time ();
72	}	265	}
73		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
74	#define array_needsize(base,cur,cnt,init) \	275	#define array_needsize(type,base,cur,cnt,init) \
75	if ((cnt) > cur) \	276	if (expect_false ((cnt) > cur)) \
76	{ \	277	{ \
77	int newcnt = cur ? cur << 1 : 16; \	278	int newcnt = cur; \
78	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	\
79	base = realloc (base, sizeof (base) (newcnt)); \	285	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
80	init (base + cur, newcnt - cur); \	286	init (base + cur, newcnt - cur); \
81	cur = newcnt; \	287	cur = newcnt; \
82	}	288	}
83		289
84	typedef struct	290	#define array_slim(type,stem) \
85	{	291	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
86	struct ev_io *head;	292	{ \
87	unsigned char wev, rev; /* want, received event set */	293	stem ## max = array_roundsize (stem ## cnt >> 1); \
88	} ANFD;	294	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
		295	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		296	}
89		297
90	static ANFD *anfds;	298	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
91	static int anfdmax;	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;
92		302
93	static int *fdchanges;	303	#define array_free(stem, idx) \
94	static int fdchangemax, fdchangecnt;	304	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		305
		306	/*****************************************************************************/
95		307
96	static void	308	static void
97	anfds_init (ANFD *base, int count)	309	anfds_init (ANFD *base, int count)
98	{	310	{
99	while (count--)	311	while (count--)
100	{	312	{
101	base->head = 0;	313	base->head = 0;
102	base->wev = base->rev = EV_NONE;	314	base->events = EV_NONE;
		315	base->reify = 0;
		316
103	++base;	317	++base;
104	}	318	}
105	}	319	}
106		320
107	typedef struct	321	void
		322	ev_feed_event (EV_P_ void *w, int revents)
108	{	323	{
109	struct ev_watcher *w;	324	W w_ = (W)w;
110	int events;
111	} ANPENDING;
112		325
113	static ANPENDING *pendings;	326	if (w_->pending)
114	static int pendingmax, pendingcnt;	327	{
		328	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		329	return;
		330	}
115		331
116	static void
117	event (struct ev_watcher *w, int events)
118	{
119	w->pending = ++pendingcnt;	332	w_->pending = ++pendingcnt [ABSPRI (w_)];
120	array_needsize (pendings, pendingmax, pendingcnt, );	333	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
121	pendings [pendingcnt - 1].w = w;	334	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
122	pendings [pendingcnt - 1].events = events;	335	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
123	}	336	}
124		337
125	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	inline void
126	fd_event (int fd, int events)	348	fd_event (EV_P_ int fd, int revents)
127	{	349	{
128	ANFD *anfd = anfds + fd;	350	ANFD *anfd = anfds + fd;
129	struct ev_io *w;	351	struct ev_io *w;
130		352
131	for (w = anfd->head; w; w = w->next)	353	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
132	{	354	{
133	int ev = w->events & events;	355	int ev = w->events & revents;
134		356
135	if (ev)	357	if (ev)
136	event ((struct ev_watcher *)w, ev);	358	ev_feed_event (EV_A_ (W)w, ev);
		359	}
		360	}
		361
		362	void
		363	ev_feed_fd_event (EV_P_ int fd, int revents)
		364	{
		365	fd_event (EV_A_ fd, revents);
		366	}
		367
		368	/*****************************************************************************/
		369
		370	static void
		371	fd_reify (EV_P)
		372	{
		373	int i;
		374
		375	for (i = 0; i < fdchangecnt; ++i)
		376	{
		377	int fd = fdchanges [i];
		378	ANFD *anfd = anfds + fd;
		379	struct ev_io *w;
		380
		381	int events = 0;
		382
		383	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		384	events \|= w->events;
		385
		386	anfd->reify = 0;
		387
		388	method_modify (EV_A_ fd, anfd->events, events);
		389	anfd->events = events;
		390	}
		391
		392	fdchangecnt = 0;
		393	}
		394
		395	static void
		396	fd_change (EV_P_ int fd)
		397	{
		398	if (anfds [fd].reify)
		399	return;
		400
		401	anfds [fd].reify = 1;
		402
		403	++fdchangecnt;
		404	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		405	fdchanges [fdchangecnt - 1] = fd;
		406	}
		407
		408	static void
		409	fd_kill (EV_P_ int fd)
		410	{
		411	struct ev_io *w;
		412
		413	while ((w = (struct ev_io *)anfds [fd].head))
		414	{
		415	ev_io_stop (EV_A_ w);
		416	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		417	}
		418	}
		419
		420	static int
		421	fd_valid (int fd)
		422	{
		423	#ifdef WIN32
		424	return !!win32_get_osfhandle (fd);
		425	#else
		426	return fcntl (fd, F_GETFD) != -1;
		427	#endif
		428	}
		429
		430	/* called on EBADF to verify fds */
		431	static void
		432	fd_ebadf (EV_P)
		433	{
		434	int fd;
		435
		436	for (fd = 0; fd < anfdmax; ++fd)
		437	if (anfds [fd].events)
		438	if (!fd_valid (fd) == -1 && errno == EBADF)
		439	fd_kill (EV_A_ fd);
		440	}
		441
		442	/* called on ENOMEM in select/poll to kill some fds and retry */
		443	static void
		444	fd_enomem (EV_P)
		445	{
		446	int fd;
		447
		448	for (fd = anfdmax; fd--; )
		449	if (anfds [fd].events)
		450	{
		451	fd_kill (EV_A_ fd);
		452	return;
137	}	453	}
138	}	454	}
139		455
140	static struct ev_timer **atimers;	456	/* usually called after fork if method needs to re-arm all fds from scratch */
141	static int atimermax, atimercnt;
142
143	static struct ev_timer **rtimers;
144	static int rtimermax, rtimercnt;
145
146	static void	457	static void
147	upheap (struct ev_timer **timers, int k)	458	fd_rearm_all (EV_P)
148	{	459	{
149	struct ev_timer *w = timers [k];	460	int fd;
150		461
		462	/* this should be highly optimised to not do anything but set a flag */
		463	for (fd = 0; fd < anfdmax; ++fd)
		464	if (anfds [fd].events)
		465	{
		466	anfds [fd].events = 0;
		467	fd_change (EV_A_ fd);
		468	}
		469	}
		470
		471	/*****************************************************************************/
		472
		473	static void
		474	upheap (WT *heap, int k)
		475	{
		476	WT w = heap [k];
		477
151	while (k && timers [k >> 1]->at > w->at)	478	while (k && heap [k >> 1]->at > w->at)
152	{	479	{
153	timers [k] = timers [k >> 1];	480	heap [k] = heap [k >> 1];
154	timers [k]->active = k + 1;	481	((W)heap [k])->active = k + 1;
155	k >>= 1;	482	k >>= 1;
156	}	483	}
157		484
158	timers [k] = w;	485	heap [k] = w;
159	timers [k]->active = k + 1;	486	((W)heap [k])->active = k + 1;
160		487
161	}	488	}
162		489
163	static void	490	static void
164	downheap (struct ev_timer **timers, int N, int k)	491	downheap (WT *heap, int N, int k)
165	{	492	{
166	struct ev_timer *w = timers [k];	493	WT w = heap [k];
167		494
168	while (k < (N >> 1))	495	while (k < (N >> 1))
169	{	496	{
170	int j = k << 1;	497	int j = k << 1;
171		498
172	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	499	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
173	++j;	500	++j;
174		501
175	if (w->at <= timers [j]->at)	502	if (w->at <= heap [j]->at)
176	break;	503	break;
177		504
178	timers [k] = timers [j];	505	heap [k] = heap [j];
179	timers [k]->active = k + 1;	506	((W)heap [k])->active = k + 1;
180	k = j;	507	k = j;
181	}	508	}
182		509
183	timers [k] = w;	510	heap [k] = w;
184	timers [k]->active = k + 1;	511	((W)heap [k])->active = k + 1;
185	}	512	}
		513
		514	/*****************************************************************************/
186		515
187	typedef struct	516	typedef struct
188	{	517	{
189	struct ev_signal *head;	518	WL head;
190	sig_atomic_t gotsig;	519	sig_atomic_t volatile gotsig;
191	} ANSIG;	520	} ANSIG;
192		521
193	static ANSIG *signals;	522	static ANSIG *signals;
194	static int signalmax;	523	static int signalmax;
195		524
196	static int sigpipe [2];	525	static int sigpipe [2];
197	static sig_atomic_t gotsig;	526	static sig_atomic_t volatile gotsig;
198	static struct ev_io sigev;	527	static struct ev_io sigev;
199		528
200	static void	529	static void
201	signals_init (ANSIG *base, int count)	530	signals_init (ANSIG *base, int count)
202	{	531	{
203	while (count--)	532	while (count--)
204	{	533	{
205	base->head = 0;	534	base->head = 0;
206	base->gotsig = 0;	535	base->gotsig = 0;
		536
207	++base;	537	++base;
208	}	538	}
209	}	539	}
210		540
211	static void	541	static void
212	sighandler (int signum)	542	sighandler (int signum)
213	{	543	{
		544	#if WIN32
		545	signal (signum, sighandler);
		546	#endif
		547
214	signals [signum - 1].gotsig = 1;	548	signals [signum - 1].gotsig = 1;
215		549
216	if (!gotsig)	550	if (!gotsig)
217	{	551	{
		552	int old_errno = errno;
218	gotsig = 1;	553	gotsig = 1;
		554	#ifdef WIN32
		555	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		556	#else
219	write (sigpipe [1], &gotsig, 1);	557	write (sigpipe [1], &signum, 1);
		558	#endif
		559	errno = old_errno;
220	}	560	}
221	}	561	}
222		562
		563	void
		564	ev_feed_signal_event (EV_P_ int signum)
		565	{
		566	#if EV_MULTIPLICITY
		567	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		568	#endif
		569
		570	--signum;
		571
		572	if (signum < 0 \|\| signum >= signalmax)
		573	return;
		574
		575	signals [signum].gotsig = 0;
		576
		577	for (w = signals [signum].head; w; w = w->next)
		578	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		579	}
		580
223	static void	581	static void
224	sigcb (struct ev_io *iow, int revents)	582	sigcb (EV_P_ struct ev_io *iow, int revents)
225	{	583	{
226	struct ev_signal *w;	584	WL w;
227	int sig;	585	int signum;
228		586
		587	#ifdef WIN32
		588	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		589	#else
		590	read (sigpipe [0], &revents, 1);
		591	#endif
229	gotsig = 0;	592	gotsig = 0;
230	read (sigpipe [0], &revents, 1);
231		593
232	for (sig = signalmax; sig--; )	594	for (signum = signalmax; signum--; )
233	if (signals [sig].gotsig)	595	if (signals [signum].gotsig)
234	{	596	sigevent (EV_A_ signum + 1);
235	signals [sig].gotsig = 0;
236
237	for (w = signals [sig].head; w; w = w->next)
238	event ((struct ev_watcher *)w, EV_SIGNAL);
239	}
240	}	597	}
241		598
242	static void	599	static void
243	siginit (void)	600	siginit (EV_P)
244	{	601	{
		602	#ifndef WIN32
245	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	603	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
246	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	604	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
247		605
248	/* rather than sort out wether we really need nb, set it */	606	/* rather than sort out wether we really need nb, set it */
249	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	607	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
250	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	608	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		609	#endif
251		610
252	evio_set (&sigev, sigpipe [0], EV_READ);	611	ev_io_set (&sigev, sigpipe [0], EV_READ);
253	evio_start (&sigev);	612	ev_io_start (EV_A_ &sigev);
		613	ev_unref (EV_A); /* child watcher should not keep loop alive */
254	}	614	}
255		615
		616	/*****************************************************************************/
		617
		618	static struct ev_child *childs [PID_HASHSIZE];
		619
		620	#ifndef WIN32
		621
		622	static struct ev_signal childev;
		623
		624	#ifndef WCONTINUED
		625	# define WCONTINUED 0
		626	#endif
		627
		628	static void
		629	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		630	{
		631	struct ev_child *w;
		632
		633	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		634	if (w->pid == pid \|\| !w->pid)
		635	{
		636	ev_priority (w) = ev_priority (sw); /* need to do it now */
		637	w->rpid = pid;
		638	w->rstatus = status;
		639	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		640	}
		641	}
		642
		643	static void
		644	childcb (EV_P_ struct ev_signal *sw, int revents)
		645	{
		646	int pid, status;
		647
		648	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		649	{
		650	/* make sure we are called again until all childs have been reaped */
		651	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		652
		653	child_reap (EV_A_ sw, pid, pid, status);
		654	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		655	}
		656	}
		657
		658	#endif
		659
		660	/*****************************************************************************/
		661
		662	#if EV_USE_KQUEUE
		663	# include "ev_kqueue.c"
		664	#endif
256	#if HAVE_EPOLL	665	#if EV_USE_EPOLL
257	# include "ev_epoll.c"	666	# include "ev_epoll.c"
258	#endif	667	#endif
		668	#if EV_USE_POLL
		669	# include "ev_poll.c"
		670	#endif
259	#if HAVE_SELECT	671	#if EV_USE_SELECT
260	# include "ev_select.c"	672	# include "ev_select.c"
261	#endif	673	#endif
262		674
263	int ev_init (int flags)	675	int
		676	ev_version_major (void)
264	{	677	{
		678	return EV_VERSION_MAJOR;
		679	}
		680
		681	int
		682	ev_version_minor (void)
		683	{
		684	return EV_VERSION_MINOR;
		685	}
		686
		687	/* return true if we are running with elevated privileges and should ignore env variables */
		688	static int
		689	enable_secure (void)
		690	{
		691	#ifdef WIN32
		692	return 0;
		693	#else
		694	return getuid () != geteuid ()
		695	\|\| getgid () != getegid ();
		696	#endif
		697	}
		698
		699	int
		700	ev_method (EV_P)
		701	{
		702	return method;
		703	}
		704
		705	static void
		706	loop_init (EV_P_ int methods)
		707	{
		708	if (!method)
		709	{
265	#if HAVE_MONOTONIC	710	#if EV_USE_MONOTONIC
266	{	711	{
267	struct timespec ts;	712	struct timespec ts;
268	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	713	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
269	have_monotonic = 1;	714	have_monotonic = 1;
270	}	715	}
271	#endif	716	#endif
272		717
273	ev_now = ev_time ();	718	rt_now = ev_time ();
274	now = get_clock ();	719	mn_now = get_clock ();
275	diff = ev_now - now;	720	now_floor = mn_now;
		721	rtmn_diff = rt_now - mn_now;
276		722
277	if (pipe (sigpipe))	723	if (methods == EVMETHOD_AUTO)
278	return 0;	724	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		725	methods = atoi (getenv ("LIBEV_METHODS"));
		726	else
		727	methods = EVMETHOD_ANY;
279		728
280	ev_method = EVMETHOD_NONE;	729	method = 0;
		730	#if EV_USE_WIN32
		731	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		732	#endif
		733	#if EV_USE_KQUEUE
		734	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		735	#endif
281	#if HAVE_EPOLL	736	#if EV_USE_EPOLL
282	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	737	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
283	#endif	738	#endif
		739	#if EV_USE_POLL
		740	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		741	#endif
284	#if HAVE_SELECT	742	#if EV_USE_SELECT
285	if (ev_method == EVMETHOD_NONE) select_init (flags);	743	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
286	#endif	744	#endif
287		745
288	if (ev_method)
289	{
290	evw_init (&sigev, sigcb, 0);	746	ev_watcher_init (&sigev, sigcb);
291	siginit ();	747	ev_set_priority (&sigev, EV_MAXPRI);
292	}	748	}
293
294	return ev_method;
295	}	749	}
296		750
297	void ev_prefork (void)	751	void
298	{	752	loop_destroy (EV_P)
299	}
300
301	void ev_postfork_parent (void)
302	{
303	}
304
305	void ev_postfork_child (void)
306	{
307	#if HAVE_EPOLL
308	if (ev_method == EVMETHOD_EPOLL)
309	epoll_postfork_child ();
310	#endif
311
312	evio_stop (&sigev);
313	close (sigpipe [0]);
314	close (sigpipe [1]);
315	pipe (sigpipe);
316	siginit ();
317	}
318
319	static void
320	fd_reify (void)
321	{	753	{
322	int i;	754	int i;
323		755
324	for (i = 0; i < fdchangecnt; ++i)	756	#if EV_USE_WIN32
		757	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		758	#endif
		759	#if EV_USE_KQUEUE
		760	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		761	#endif
		762	#if EV_USE_EPOLL
		763	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		764	#endif
		765	#if EV_USE_POLL
		766	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		767	#endif
		768	#if EV_USE_SELECT
		769	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		770	#endif
		771
		772	for (i = NUMPRI; i--; )
		773	array_free (pending, [i]);
		774
		775	/* have to use the microsoft-never-gets-it-right macro */
		776	array_free_microshit (fdchange);
		777	array_free_microshit (timer);
		778	array_free_microshit (periodic);
		779	array_free_microshit (idle);
		780	array_free_microshit (prepare);
		781	array_free_microshit (check);
		782
		783	method = 0;
		784	}
		785
		786	static void
		787	loop_fork (EV_P)
		788	{
		789	#if EV_USE_EPOLL
		790	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		791	#endif
		792	#if EV_USE_KQUEUE
		793	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		794	#endif
		795
		796	if (ev_is_active (&sigev))
		797	{
		798	/* default loop */
		799
		800	ev_ref (EV_A);
		801	ev_io_stop (EV_A_ &sigev);
		802	close (sigpipe [0]);
		803	close (sigpipe [1]);
		804
		805	while (pipe (sigpipe))
		806	syserr ("(libev) error creating pipe");
		807
		808	siginit (EV_A);
325	{	809	}
326	int fd = fdchanges [i];
327	ANFD *anfd = anfds + fd;
328	struct ev_io *w;
329		810
330	int wev = 0;	811	postfork = 0;
		812	}
331		813
332	for (w = anfd->head; w; w = w->next)	814	#if EV_MULTIPLICITY
333	wev \|= w->events;	815	struct ev_loop *
		816	ev_loop_new (int methods)
		817	{
		818	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
334		819
335	if (anfd->wev != wev)	820	memset (loop, 0, sizeof (struct ev_loop));
		821
		822	loop_init (EV_A_ methods);
		823
		824	if (ev_method (EV_A))
		825	return loop;
		826
		827	return 0;
		828	}
		829
		830	void
		831	ev_loop_destroy (EV_P)
		832	{
		833	loop_destroy (EV_A);
		834	ev_free (loop);
		835	}
		836
		837	void
		838	ev_loop_fork (EV_P)
		839	{
		840	postfork = 1;
		841	}
		842
		843	#endif
		844
		845	#if EV_MULTIPLICITY
		846	struct ev_loop default_loop_struct;
		847	static struct ev_loop *default_loop;
		848
		849	struct ev_loop *
		850	#else
		851	static int default_loop;
		852
		853	int
		854	#endif
		855	ev_default_loop (int methods)
		856	{
		857	if (sigpipe [0] == sigpipe [1])
		858	if (pipe (sigpipe))
		859	return 0;
		860
		861	if (!default_loop)
		862	{
		863	#if EV_MULTIPLICITY
		864	struct ev_loop *loop = default_loop = &default_loop_struct;
		865	#else
		866	default_loop = 1;
		867	#endif
		868
		869	loop_init (EV_A_ methods);
		870
		871	if (ev_method (EV_A))
336	{	872	{
337	method_modify (fd, anfd->wev, wev);	873	siginit (EV_A);
338	anfd->wev = wev;	874
		875	#ifndef WIN32
		876	ev_signal_init (&childev, childcb, SIGCHLD);
		877	ev_set_priority (&childev, EV_MAXPRI);
		878	ev_signal_start (EV_A_ &childev);
		879	ev_unref (EV_A); /* child watcher should not keep loop alive */
		880	#endif
339	}	881	}
		882	else
		883	default_loop = 0;
340	}	884	}
341		885
342	fdchangecnt = 0;	886	return default_loop;
343	}	887	}
344		888
		889	void
		890	ev_default_destroy (void)
		891	{
		892	#if EV_MULTIPLICITY
		893	struct ev_loop *loop = default_loop;
		894	#endif
		895
		896	#ifndef WIN32
		897	ev_ref (EV_A); /* child watcher */
		898	ev_signal_stop (EV_A_ &childev);
		899	#endif
		900
		901	ev_ref (EV_A); /* signal watcher */
		902	ev_io_stop (EV_A_ &sigev);
		903
		904	close (sigpipe [0]); sigpipe [0] = 0;
		905	close (sigpipe [1]); sigpipe [1] = 0;
		906
		907	loop_destroy (EV_A);
		908	}
		909
		910	void
		911	ev_default_fork (void)
		912	{
		913	#if EV_MULTIPLICITY
		914	struct ev_loop *loop = default_loop;
		915	#endif
		916
		917	if (method)
		918	postfork = 1;
		919	}
		920
		921	/*****************************************************************************/
		922
345	static void	923	static int
346	call_pending ()	924	any_pending (EV_P)
347	{	925	{
348	int i;	926	int pri;
349		927
350	for (i = 0; i < pendingcnt; ++i)	928	for (pri = NUMPRI; pri--; )
		929	if (pendingcnt [pri])
		930	return 1;
		931
		932	return 0;
		933	}
		934
		935	static void
		936	call_pending (EV_P)
		937	{
		938	int pri;
		939
		940	for (pri = NUMPRI; pri--; )
		941	while (pendingcnt [pri])
351	{	942	{
352	ANPENDING *p = pendings + i;	943	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
353		944
354	if (p->w)	945	if (p->w)
355	{	946	{
356	p->w->pending = 0;	947	p->w->pending = 0;
357	p->w->cb (p->w, p->events);	948	p->w->cb (EV_A_ p->w, p->events);
358	}	949	}
359	}	950	}
360
361	pendingcnt = 0;
362	}	951	}
363		952
364	static void	953	static void
365	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	954	timers_reify (EV_P)
366	{	955	{
367	while (timercnt && timers [0]->at <= now)	956	while (timercnt && ((WT)timers [0])->at <= mn_now)
368	{	957	{
369	struct ev_timer *w = timers [0];	958	struct ev_timer *w = timers [0];
		959
		960	assert (("inactive timer on timer heap detected", ev_is_active (w)));
370		961
371	/* first reschedule or stop timer */	962	/* first reschedule or stop timer */
372	if (w->repeat)	963	if (w->repeat)
373	{	964	{
374	if (w->is_abs)	965	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
375	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
376	else
377	w->at = now + w->repeat;	966	((WT)w)->at = mn_now + w->repeat;
378
379	assert (w->at > now);
380
381	downheap (timers, timercnt, 0);	967	downheap ((WT *)timers, timercnt, 0);
382	}	968	}
383	else	969	else
		970	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		971
		972	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		973	}
		974	}
		975
		976	static void
		977	periodics_reify (EV_P)
		978	{
		979	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
		980	{
		981	struct ev_periodic *w = periodics [0];
		982
		983	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		984
		985	/* first reschedule or stop timer */
		986	if (w->reschedule_cb)
384	{	987	{
385	evtimer_stop (w); /* nonrepeating: stop timer */	988	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001);
386	--timercnt; /* maybe pass by reference instead? */	989
		990	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));
		991	downheap ((WT *)periodics, periodiccnt, 0);
387	}	992	}
		993	else if (w->interval)
		994	{
		995	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
		996	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
		997	downheap ((WT *)periodics, periodiccnt, 0);
		998	}
		999	else
		1000	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
388		1001
389	event ((struct ev_watcher *)w, EV_TIMEOUT);	1002	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
390	}	1003	}
391	}	1004	}
392		1005
393	static void	1006	static void
394	time_update ()	1007	periodics_reschedule (EV_P)
395	{	1008	{
396	int i;	1009	int i;
		1010
		1011	/* adjust periodics after time jump */
		1012	for (i = 0; i < periodiccnt; ++i)
		1013	{
		1014	struct ev_periodic *w = periodics [i];
		1015
		1016	if (w->reschedule_cb)
		1017	((WT)w)->at = w->reschedule_cb (w, rt_now);
		1018	else if (w->interval)
		1019	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1020	}
		1021
		1022	/* now rebuild the heap */
		1023	for (i = periodiccnt >> 1; i--; )
		1024	downheap ((WT *)periodics, periodiccnt, i);
		1025	}
		1026
		1027	inline int
		1028	time_update_monotonic (EV_P)
		1029	{
		1030	mn_now = get_clock ();
		1031
		1032	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1033	{
		1034	rt_now = rtmn_diff + mn_now;
		1035	return 0;
		1036	}
		1037	else
		1038	{
		1039	now_floor = mn_now;
397	ev_now = ev_time ();	1040	rt_now = ev_time ();
398		1041	return 1;
399	if (have_monotonic)
400	{	1042	}
401	ev_tstamp odiff = diff;	1043	}
402		1044
403	/* detecting time jumps is much more difficult */	1045	static void
404	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1046	time_update (EV_P)
		1047	{
		1048	int i;
		1049
		1050	#if EV_USE_MONOTONIC
		1051	if (expect_true (have_monotonic))
		1052	{
		1053	if (time_update_monotonic (EV_A))
405	{	1054	{
406	now = get_clock ();	1055	ev_tstamp odiff = rtmn_diff;
		1056
		1057	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1058	{
407	diff = ev_now - now;	1059	rtmn_diff = rt_now - mn_now;
408		1060
409	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1061	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
410	return; /* all is well */	1062	return; /* all is well */
411		1063
412	ev_now = ev_time ();	1064	rt_now = ev_time ();
		1065	mn_now = get_clock ();
		1066	now_floor = mn_now;
		1067	}
		1068
		1069	periodics_reschedule (EV_A);
		1070	/* no timer adjustment, as the monotonic clock doesn't jump */
		1071	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
413	}	1072	}
		1073	}
		1074	else
		1075	#endif
		1076	{
		1077	rt_now = ev_time ();
414		1078
415	/* time jump detected, reschedule atimers */	1079	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
416	for (i = 0; i < atimercnt; ++i)
417	{	1080	{
418	struct ev_timer *w = atimers [i];	1081	periodics_reschedule (EV_A);
419	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1082
		1083	/* adjust timers. this is easy, as the offset is the same for all */
		1084	for (i = 0; i < timercnt; ++i)
		1085	((WT)timers [i])->at += rt_now - mn_now;
420	}	1086	}
421	}
422	else
423	{
424	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
425	/* time jump detected, adjust rtimers */
426	for (i = 0; i < rtimercnt; ++i)
427	rtimers [i]->at += ev_now - now;
428		1087
429	now = ev_now;	1088	mn_now = rt_now;
430	}	1089	}
431	}	1090	}
432		1091
433	int ev_loop_done;	1092	void
		1093	ev_ref (EV_P)
		1094	{
		1095	++activecnt;
		1096	}
434		1097
		1098	void
		1099	ev_unref (EV_P)
		1100	{
		1101	--activecnt;
		1102	}
		1103
		1104	static int loop_done;
		1105
		1106	void
435	void ev_loop (int flags)	1107	ev_loop (EV_P_ int flags)
436	{	1108	{
437	double block;	1109	double block;
438	ev_loop_done = flags & EVLOOP_ONESHOT;	1110	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
439		1111
440	do	1112	do
441	{	1113	{
		1114	/* queue check watchers (and execute them) */
		1115	if (expect_false (preparecnt))
		1116	{
		1117	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1118	call_pending (EV_A);
		1119	}
		1120
		1121	/* we might have forked, so reify kernel state if necessary */
		1122	if (expect_false (postfork))
		1123	loop_fork (EV_A);
		1124
442	/* update fd-related kernel structures */	1125	/* update fd-related kernel structures */
443	fd_reify ();	1126	fd_reify (EV_A);
444		1127
445	/* calculate blocking time */	1128	/* calculate blocking time */
		1129
		1130	/* we only need this for !monotonic clock or timers, but as we basically
		1131	always have timers, we just calculate it always */
		1132	#if EV_USE_MONOTONIC
		1133	if (expect_true (have_monotonic))
		1134	time_update_monotonic (EV_A);
		1135	else
		1136	#endif
		1137	{
		1138	rt_now = ev_time ();
		1139	mn_now = rt_now;
		1140	}
		1141
446	if (flags & EVLOOP_NONBLOCK)	1142	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
447	block = 0.;	1143	block = 0.;
448	else	1144	else
449	{	1145	{
450	block = MAX_BLOCKTIME;	1146	block = MAX_BLOCKTIME;
451		1147
452	if (rtimercnt)	1148	if (timercnt)
453	{	1149	{
454	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1150	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
455	if (block > to) block = to;	1151	if (block > to) block = to;
456	}	1152	}
457		1153
458	if (atimercnt)	1154	if (periodiccnt)
459	{	1155	{
460	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1156	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
461	if (block > to) block = to;	1157	if (block > to) block = to;
462	}	1158	}
463		1159
464	if (block < 0.) block = 0.;	1160	if (block < 0.) block = 0.;
465	}	1161	}
466		1162
467	method_poll (block);	1163	method_poll (EV_A_ block);
468		1164
469	/* update ev_now, do magic */	1165	/* update rt_now, do magic */
470	time_update ();	1166	time_update (EV_A);
471		1167
472	/* put pending timers into pendign queue and reschedule them */	1168	/* queue pending timers and reschedule them */
473	/* absolute timers first */	1169	timers_reify (EV_A); /* relative timers called last */
474	timers_reify (atimers, atimercnt, ev_now);	1170	periodics_reify (EV_A); /* absolute timers called first */
475	/* relative timers second */
476	timers_reify (rtimers, rtimercnt, now);
477		1171
		1172	/* queue idle watchers unless io or timers are pending */
		1173	if (idlecnt && !any_pending (EV_A))
		1174	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		1175
		1176	/* queue check watchers, to be executed first */
		1177	if (checkcnt)
		1178	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1179
478	call_pending ();	1180	call_pending (EV_A);
479	}	1181	}
480	while (!ev_loop_done);	1182	while (activecnt && !loop_done);
481	}
482		1183
483	static void	1184	if (loop_done != 2)
484	wlist_add (struct ev_watcher_list *head, struct ev_watcher_list elem)	1185	loop_done = 0;
		1186	}
		1187
		1188	void
		1189	ev_unloop (EV_P_ int how)
		1190	{
		1191	loop_done = how;
		1192	}
		1193
		1194	/*****************************************************************************/
		1195
		1196	inline void
		1197	wlist_add (WL *head, WL elem)
485	{	1198	{
486	elem->next = *head;	1199	elem->next = *head;
487	*head = elem;	1200	*head = elem;
488	}	1201	}
489		1202
490	static void	1203	inline void
491	wlist_del (struct ev_watcher_list *head, struct ev_watcher_list elem)	1204	wlist_del (WL *head, WL elem)
492	{	1205	{
493	while (*head)	1206	while (*head)
494	{	1207	{
495	if (*head == elem)	1208	if (*head == elem)
496	{	1209	{
500		1213
501	head = &(*head)->next;	1214	head = &(*head)->next;
502	}	1215	}
503	}	1216	}
504		1217
505	static void	1218	inline void
506	ev_start (struct ev_watcher *w, int active)	1219	ev_clear_pending (EV_P_ W w)
507	{	1220	{
		1221	if (w->pending)
		1222	{
		1223	pendings [ABSPRI (w)][w->pending - 1].w = 0;
508	w->pending = 0;	1224	w->pending = 0;
		1225	}
		1226	}
		1227
		1228	inline void
		1229	ev_start (EV_P_ W w, int active)
		1230	{
		1231	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1232	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1233
509	w->active = active;	1234	w->active = active;
		1235	ev_ref (EV_A);
510	}	1236	}
511		1237
512	static void	1238	inline void
513	ev_stop (struct ev_watcher *w)	1239	ev_stop (EV_P_ W w)
514	{	1240	{
515	if (w->pending)	1241	ev_unref (EV_A);
516	pendings [w->pending - 1].w = 0;
517
518	w->active = 0;	1242	w->active = 0;
519	/* nop */
520	}	1243	}
521		1244
		1245	/*****************************************************************************/
		1246
522	void	1247	void
523	evio_start (struct ev_io *w)	1248	ev_io_start (EV_P_ struct ev_io *w)
524	{	1249	{
		1250	int fd = w->fd;
		1251
525	if (ev_is_active (w))	1252	if (ev_is_active (w))
526	return;	1253	return;
527		1254
528	int fd = w->fd;	1255	assert (("ev_io_start called with negative fd", fd >= 0));
529		1256
530	ev_start ((struct ev_watcher *)w, 1);	1257	ev_start (EV_A_ (W)w, 1);
531	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1258	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
532	wlist_add ((struct ev_watcher_list *)&anfds[fd].head, (struct ev_watcher_list )w);	1259	wlist_add ((WL *)&anfds[fd].head, (WL)w);
533		1260
534	++fdchangecnt;	1261	fd_change (EV_A_ fd);
535	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
536	fdchanges [fdchangecnt - 1] = fd;
537	}	1262	}
538		1263
539	void	1264	void
540	evio_stop (struct ev_io *w)	1265	ev_io_stop (EV_P_ struct ev_io *w)
541	{	1266	{
		1267	ev_clear_pending (EV_A_ (W)w);
542	if (!ev_is_active (w))	1268	if (!ev_is_active (w))
543	return;	1269	return;
544		1270
545	wlist_del ((struct ev_watcher_list *)&anfds[w->fd].head, (struct ev_watcher_list )w);	1271	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
546	ev_stop ((struct ev_watcher *)w);	1272	ev_stop (EV_A_ (W)w);
547		1273
548	++fdchangecnt;	1274	fd_change (EV_A_ w->fd);
549	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
550	fdchanges [fdchangecnt - 1] = w->fd;
551	}	1275	}
552		1276
553	void	1277	void
554	evtimer_start (struct ev_timer *w)	1278	ev_timer_start (EV_P_ struct ev_timer *w)
555	{	1279	{
556	if (ev_is_active (w))	1280	if (ev_is_active (w))
557	return;	1281	return;
558		1282
559	if (w->is_abs)	1283	((WT)w)->at += mn_now;
		1284
		1285	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1286
		1287	ev_start (EV_A_ (W)w, ++timercnt);
		1288	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
		1289	timers [timercnt - 1] = w;
		1290	upheap ((WT *)timers, timercnt - 1);
		1291
		1292	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1293	}
		1294
		1295	void
		1296	ev_timer_stop (EV_P_ struct ev_timer *w)
		1297	{
		1298	ev_clear_pending (EV_A_ (W)w);
		1299	if (!ev_is_active (w))
		1300	return;
		1301
		1302	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1303
		1304	if (((W)w)->active < timercnt--)
		1305	{
		1306	timers [((W)w)->active - 1] = timers [timercnt];
		1307	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
560	{	1308	}
561	/* this formula differs from the one in timer_reify becuse we do not round up */	1309
		1310	((WT)w)->at = w->repeat;
		1311
		1312	ev_stop (EV_A_ (W)w);
		1313	}
		1314
		1315	void
		1316	ev_timer_again (EV_P_ struct ev_timer *w)
		1317	{
		1318	if (ev_is_active (w))
		1319	{
562	if (w->repeat)	1320	if (w->repeat)
563	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1321	{
564		1322	((WT)w)->at = mn_now + w->repeat;
565	ev_start ((struct ev_watcher *)w, ++atimercnt);	1323	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
566	array_needsize (atimers, atimermax, atimercnt, );	1324	}
567	atimers [atimercnt - 1] = w;
568	upheap (atimers, atimercnt - 1);
569	}
570	else	1325	else
		1326	ev_timer_stop (EV_A_ w);
571	{	1327	}
572	w->at += now;	1328	else if (w->repeat)
		1329	ev_timer_start (EV_A_ w);
		1330	}
573		1331
574	ev_start ((struct ev_watcher *)w, ++rtimercnt);	1332	void
575	array_needsize (rtimers, rtimermax, rtimercnt, );	1333	ev_periodic_start (EV_P_ struct ev_periodic *w)
576	rtimers [rtimercnt - 1] = w;	1334	{
577	upheap (rtimers, rtimercnt - 1);	1335	if (ev_is_active (w))
		1336	return;
		1337
		1338	if (w->reschedule_cb)
		1339	((WT)w)->at = w->reschedule_cb (w, rt_now);
		1340	else if (w->interval)
578	}	1341	{
		1342	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1343	/* this formula differs from the one in periodic_reify because we do not always round up */
		1344	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1345	}
579		1346
580	}	1347	ev_start (EV_A_ (W)w, ++periodiccnt);
		1348	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
		1349	periodics [periodiccnt - 1] = w;
		1350	upheap ((WT *)periodics, periodiccnt - 1);
581		1351
		1352	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1353	}
		1354
582	void	1355	void
583	evtimer_stop (struct ev_timer *w)	1356	ev_periodic_stop (EV_P_ struct ev_periodic *w)
584	{	1357	{
		1358	ev_clear_pending (EV_A_ (W)w);
585	if (!ev_is_active (w))	1359	if (!ev_is_active (w))
586	return;	1360	return;
587		1361
588	if (w->is_abs)	1362	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
589	{	1363
590	if (w->active < atimercnt--)	1364	if (((W)w)->active < periodiccnt--)
591	{
592	atimers [w->active - 1] = atimers [atimercnt];
593	downheap (atimers, atimercnt, w->active - 1);
594	}
595	}	1365	{
596	else	1366	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1367	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
597	{	1368	}
598	if (w->active < rtimercnt--)
599	{
600	rtimers [w->active - 1] = rtimers [rtimercnt];
601	downheap (rtimers, rtimercnt, w->active - 1);
602	}
603	}
604		1369
605	ev_stop ((struct ev_watcher *)w);	1370	ev_stop (EV_A_ (W)w);
606	}	1371	}
607		1372
608	void	1373	void
609	evsignal_start (struct ev_signal *w)	1374	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1375	{
		1376	ev_periodic_stop (EV_A_ w);
		1377	ev_periodic_start (EV_A_ w);
		1378	}
		1379
		1380	void
		1381	ev_idle_start (EV_P_ struct ev_idle *w)
610	{	1382	{
611	if (ev_is_active (w))	1383	if (ev_is_active (w))
612	return;	1384	return;
613		1385
614	ev_start ((struct ev_watcher *)w, 1);	1386	ev_start (EV_A_ (W)w, ++idlecnt);
		1387	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1388	idles [idlecnt - 1] = w;
		1389	}
		1390
		1391	void
		1392	ev_idle_stop (EV_P_ struct ev_idle *w)
		1393	{
		1394	ev_clear_pending (EV_A_ (W)w);
		1395	if (ev_is_active (w))
		1396	return;
		1397
		1398	idles [((W)w)->active - 1] = idles [--idlecnt];
		1399	ev_stop (EV_A_ (W)w);
		1400	}
		1401
		1402	void
		1403	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1404	{
		1405	if (ev_is_active (w))
		1406	return;
		1407
		1408	ev_start (EV_A_ (W)w, ++preparecnt);
		1409	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1410	prepares [preparecnt - 1] = w;
		1411	}
		1412
		1413	void
		1414	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1415	{
		1416	ev_clear_pending (EV_A_ (W)w);
		1417	if (ev_is_active (w))
		1418	return;
		1419
		1420	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1421	ev_stop (EV_A_ (W)w);
		1422	}
		1423
		1424	void
		1425	ev_check_start (EV_P_ struct ev_check *w)
		1426	{
		1427	if (ev_is_active (w))
		1428	return;
		1429
		1430	ev_start (EV_A_ (W)w, ++checkcnt);
		1431	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1432	checks [checkcnt - 1] = w;
		1433	}
		1434
		1435	void
		1436	ev_check_stop (EV_P_ struct ev_check *w)
		1437	{
		1438	ev_clear_pending (EV_A_ (W)w);
		1439	if (ev_is_active (w))
		1440	return;
		1441
		1442	checks [((W)w)->active - 1] = checks [--checkcnt];
		1443	ev_stop (EV_A_ (W)w);
		1444	}
		1445
		1446	#ifndef SA_RESTART
		1447	# define SA_RESTART 0
		1448	#endif
		1449
		1450	void
		1451	ev_signal_start (EV_P_ struct ev_signal *w)
		1452	{
		1453	#if EV_MULTIPLICITY
		1454	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1455	#endif
		1456	if (ev_is_active (w))
		1457	return;
		1458
		1459	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1460
		1461	ev_start (EV_A_ (W)w, 1);
615	array_needsize (signals, signalmax, w->signum, signals_init);	1462	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
616	wlist_add ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	1463	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
617		1464
618	if (!w->next)	1465	if (!((WL)w)->next)
619	{	1466	{
		1467	#if WIN32
		1468	signal (w->signum, sighandler);
		1469	#else
620	struct sigaction sa;	1470	struct sigaction sa;
621	sa.sa_handler = sighandler;	1471	sa.sa_handler = sighandler;
622	sigfillset (&sa.sa_mask);	1472	sigfillset (&sa.sa_mask);
623	sa.sa_flags = 0;	1473	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
624	sigaction (w->signum, &sa, 0);	1474	sigaction (w->signum, &sa, 0);
		1475	#endif
625	}	1476	}
626	}	1477	}
627		1478
628	void	1479	void
629	evsignal_stop (struct ev_signal *w)	1480	ev_signal_stop (EV_P_ struct ev_signal *w)
630	{	1481	{
		1482	ev_clear_pending (EV_A_ (W)w);
631	if (!ev_is_active (w))	1483	if (!ev_is_active (w))
632	return;	1484	return;
633		1485
634	wlist_del ((struct ev_watcher_list *)&signals [w->signum - 1].head, (struct ev_watcher_list )w);	1486	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
635	ev_stop ((struct ev_watcher *)w);	1487	ev_stop (EV_A_ (W)w);
636		1488
637	if (!signals [w->signum - 1].head)	1489	if (!signals [w->signum - 1].head)
638	signal (w->signum, SIG_DFL);	1490	signal (w->signum, SIG_DFL);
639	}	1491	}
640		1492
		1493	void
		1494	ev_child_start (EV_P_ struct ev_child *w)
		1495	{
		1496	#if EV_MULTIPLICITY
		1497	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1498	#endif
		1499	if (ev_is_active (w))
		1500	return;
		1501
		1502	ev_start (EV_A_ (W)w, 1);
		1503	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1504	}
		1505
		1506	void
		1507	ev_child_stop (EV_P_ struct ev_child *w)
		1508	{
		1509	ev_clear_pending (EV_A_ (W)w);
		1510	if (ev_is_active (w))
		1511	return;
		1512
		1513	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1514	ev_stop (EV_A_ (W)w);
		1515	}
		1516
641	/*****************************************************************************/	1517	/*****************************************************************************/
642	#if 1
643		1518
644	static void	1519	struct ev_once
645	sin_cb (struct ev_io *w, int revents)
646	{	1520	{
647	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
648	}
649
650	static void
651	ocb (struct ev_timer *w, int revents)
652	{
653	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
654	evtimer_stop (w);
655	evtimer_start (w);
656	}
657
658	static void
659	scb (struct ev_signal *w, int revents)
660	{
661	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
662	}
663
664	int main (void)
665	{
666	struct ev_io sin;	1521	struct ev_io io;
667
668	ev_init (0);
669
670	evw_init (&sin, sin_cb, 55);
671	evio_set (&sin, 0, EV_READ);
672	evio_start (&sin);
673
674	struct ev_timer t[10000];
675
676	#if 0
677	int i;
678	for (i = 0; i < 10000; ++i)
679	{
680	struct ev_timer *w = t + i;
681	evw_init (w, ocb, i);
682	evtimer_set_abs (w, drand48 (), 0.99775533);
683	evtimer_start (w);
684	if (drand48 () < 0.5)
685	evtimer_stop (w);
686	}
687	#endif
688
689	struct ev_timer t1;	1522	struct ev_timer to;
690	evw_init (&t1, ocb, 0);	1523	void (cb)(int revents, void arg);
691	evtimer_set_abs (&t1, 5, 10);	1524	void *arg;
692	evtimer_start (&t1);	1525	};
693		1526
694	struct ev_signal sig;	1527	static void
695	evw_init (&sig, scb, 65535);	1528	once_cb (EV_P_ struct ev_once *once, int revents)
696	evsignal_set (&sig, SIGQUIT);	1529	{
697	evsignal_start (&sig);	1530	void (cb)(int revents, void arg) = once->cb;
		1531	void *arg = once->arg;
698		1532
699	ev_loop (0);	1533	ev_io_stop (EV_A_ &once->io);
		1534	ev_timer_stop (EV_A_ &once->to);
		1535	ev_free (once);
700		1536
701	return 0;	1537	cb (revents, arg);
702	}	1538	}
703		1539
704	#endif	1540	static void
		1541	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1542	{
		1543	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1544	}
705		1545
		1546	static void
		1547	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1548	{
		1549	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1550	}
706		1551
		1552	void
		1553	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1554	{
		1555	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
707		1556
		1557	if (!once)
		1558	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1559	else
		1560	{
		1561	once->cb = cb;
		1562	once->arg = arg;
708		1563
		1564	ev_watcher_init (&once->io, once_cb_io);
		1565	if (fd >= 0)
		1566	{
		1567	ev_io_set (&once->io, fd, events);
		1568	ev_io_start (EV_A_ &once->io);
		1569	}
		1570
		1571	ev_watcher_init (&once->to, once_cb_to);
		1572	if (timeout >= 0.)
		1573	{
		1574	ev_timer_set (&once->to, timeout, 0.);
		1575	ev_timer_start (EV_A_ &once->to);
		1576	}
		1577	}
		1578	}
		1579

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Comparing libev/ev.c (file contents): Revision 1.7 by root, Wed Oct 31 00:24:16 2007 UTC vs. Revision 1.79 by root, Fri Nov 9 15:15:20 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.7 by root, Wed Oct 31 00:24:16 2007 UTC vs.
Revision 1.79 by root, Fri Nov 9 15:15:20 2007 UTC