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Comparing libev/ev.c (file contents):
Revision 1.1 by root, Tue Oct 30 20:59:31 2007 UTC vs.
Revision 1.73 by root, Tue Nov 6 16:27:10 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>
		59	#include <fcntl.h>
		60	#include <stddef.h>
3		61
4	#include <stdio.h>	62	#include <stdio.h>
5		63
		64	#include <assert.h>
6	#include <errno.h>	65	#include <errno.h>
7	#include <sys/time.h>	66	#include <sys/types.h>
8	#include <time.h>	67	#include <time.h>
9		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
10	#ifdef CLOCK_MONOTONIC	114	#ifndef CLOCK_MONOTONIC
		115	# undef EV_USE_MONOTONIC
11	# define HAVE_MONOTONIC 1	116	# define EV_USE_MONOTONIC 0
12	#endif	117	#endif
13		118
14	#define HAVE_EPOLL 1	119	#ifndef CLOCK_REALTIME
		120	# undef EV_USE_REALTIME
15	#define HAVE_REALTIME 1	121	# define EV_USE_REALTIME 0
16	#define HAVE_SELECT 0	122	#endif
17		123
18	#define MAX_BLOCKTIME 60.	124	/**/
		125
		126	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
		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 */
19		130
20	#include "ev.h"	131	#include "ev.h"
21		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
22	struct ev_watcher {	147	typedef struct ev_watcher *W;
23	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"
24	};	224	};
		225	# undef VAR
		226	# include "ev_wrap.h"
25		227
26	struct ev_watcher_list {	228	#else
27	EV_WATCHER_LIST (ev_watcher_list);
28	};
29		229
30	ev_tstamp ev_now;	230	# define VAR(name,decl) static decl;
31	int ev_method;	231	# include "ev_vars.h"
		232	# undef VAR
32		233
33	static int have_monotonic; /* runtime */	234	#endif
34		235
35	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	236	/*****************************************************************************/
36	static void (*method_reify)(void);
37	static void (*method_poll)(ev_tstamp timeout);
38		237
39	ev_tstamp	238	inline ev_tstamp
40	ev_time (void)	239	ev_time (void)
41	{	240	{
42	#if HAVE_REALTIME	241	#if EV_USE_REALTIME
43	struct timespec ts;	242	struct timespec ts;
44	clock_gettime (CLOCK_REALTIME, &ts);	243	clock_gettime (CLOCK_REALTIME, &ts);
45	return ts.tv_sec + ts.tv_nsec * 1e-9;	244	return ts.tv_sec + ts.tv_nsec * 1e-9;
46	#else	245	#else
47	struct timeval tv;	246	struct timeval tv;
48	gettimeofday (&tv, 0);	247	gettimeofday (&tv, 0);
49	return tv.tv_sec + tv.tv_usec * 1e-6;	248	return tv.tv_sec + tv.tv_usec * 1e-6;
50	#endif	249	#endif
51	}	250	}
52		251
53	static ev_tstamp	252	inline ev_tstamp
54	get_clock (void)	253	get_clock (void)
55	{	254	{
56	#if HAVE_MONOTONIC	255	#if EV_USE_MONOTONIC
57	if (have_monotonic)	256	if (expect_true (have_monotonic))
58	{	257	{
59	struct timespec ts;	258	struct timespec ts;
60	clock_gettime (CLOCK_MONOTONIC, &ts);	259	clock_gettime (CLOCK_MONOTONIC, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	260	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	}	261	}
63	#endif	262	#endif
64		263
65	return ev_time ();	264	return ev_time ();
66	}	265	}
67		266
		267	ev_tstamp
		268	ev_now (EV_P)
		269	{
		270	return rt_now;
		271	}
		272
		273	#define array_roundsize(base,n) ((n) | 4 & ~3)
		274
68	#define array_needsize(base,cur,cnt,init) \	275	#define array_needsize(base,cur,cnt,init) \
69	if ((cnt) > cur) \	276	if (expect_false ((cnt) > cur)) \
70	{ \	277	{ \
71	int newcnt = cur; \	278	int newcnt = cur; \
72	do \	279	do \
73	{ \	280	{ \
74	newcnt += (newcnt >> 1) + 16; \	281	newcnt = array_roundsize (base, newcnt << 1); \
75	} \	282	} \
76	while ((cnt) > newcnt); \	283	while ((cnt) > newcnt); \
77	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	284	\
78	base = realloc (base, sizeof (*base) * (newcnt)); \	285	base = ev_realloc (base, sizeof (*base) * (newcnt)); \
79	init (base + cur, newcnt - cur); \	286	init (base + cur, newcnt - cur); \
80	cur = newcnt; \	287	cur = newcnt; \
81	}	288	}
82		289
83	typedef struct	290	#define array_slim(stem) \
84	{	291	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
85	struct ev_io *head;	292	{ \
86	unsigned char wev, rev; /* want, received event set */	293	stem ## max = array_roundsize (stem ## cnt >> 1); \
87	} ANFD;	294	base = ev_realloc (base, sizeof (*base) * (stem ## max)); \
		295	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		296	}
88		297
89	static ANFD *anfds;	298	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
90	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;
91		302
92	static int *fdchanges;	303	#define array_free(stem, idx) \
93	static int fdchangemax, fdchangecnt;	304	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		305
		306	/*****************************************************************************/
94		307
95	static void	308	static void
96	anfds_init (ANFD *base, int count)	309	anfds_init (ANFD *base, int count)
97	{	310	{
98	while (count--)	311	while (count--)
99	{	312	{
100	base->head = 0;	313	base->head = 0;
101	base->wev = base->rev = EV_NONE;	314	base->events = EV_NONE;
		315	base->reify = 0;
		316
102	++base;	317	++base;
103	}	318	}
104	}	319	}
105		320
106	typedef struct
107	{
108	struct ev_watcher *w;
109	int events;
110	} ANPENDING;
111
112	static ANPENDING *pendings;
113	static int pendingmax, pendingcnt;
114
115	static void	321	static void
116	event (struct ev_watcher *w, int events)	322	event (EV_P_ W w, int events)
117	{	323	{
		324	if (w->pending)
		325	{
		326	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		327	return;
		328	}
		329
118	w->pending = ++pendingcnt;	330	w->pending = ++pendingcnt [ABSPRI (w)];
119	array_needsize (pendings, pendingmax, pendingcnt, );	331	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
120	pendings [pendingcnt - 1].w = w;	332	pendings [ABSPRI (w)][w->pending - 1].w = w;
121	pendings [pendingcnt - 1].events = events;	333	pendings [ABSPRI (w)][w->pending - 1].events = events;
122	}	334	}
123		335
124	static void	336	static void
		337	queue_events (EV_P_ W *events, int eventcnt, int type)
		338	{
		339	int i;
		340
		341	for (i = 0; i < eventcnt; ++i)
		342	event (EV_A_ events [i], type);
		343	}
		344
		345	static void
125	fd_event (int fd, int events)	346	fd_event (EV_P_ int fd, int events)
126	{	347	{
127	ANFD *anfd = anfds + fd;	348	ANFD *anfd = anfds + fd;
128	struct ev_io *w;	349	struct ev_io *w;
129		350
130	for (w = anfd->head; w; w = w->next)	351	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
131	{	352	{
132	int ev = w->events & events;	353	int ev = w->events & events;
133		354
134	if (ev)	355	if (ev)
135	event ((struct ev_watcher *)w, ev);	356	event (EV_A_ (W)w, ev);
		357	}
		358	}
		359
		360	/*****************************************************************************/
		361
		362	static void
		363	fd_reify (EV_P)
		364	{
		365	int i;
		366
		367	for (i = 0; i < fdchangecnt; ++i)
		368	{
		369	int fd = fdchanges [i];
		370	ANFD *anfd = anfds + fd;
		371	struct ev_io *w;
		372
		373	int events = 0;
		374
		375	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		376	events |= w->events;
		377
		378	anfd->reify = 0;
		379
		380	method_modify (EV_A_ fd, anfd->events, events);
		381	anfd->events = events;
		382	}
		383
		384	fdchangecnt = 0;
		385	}
		386
		387	static void
		388	fd_change (EV_P_ int fd)
		389	{
		390	if (anfds [fd].reify)
		391	return;
		392
		393	anfds [fd].reify = 1;
		394
		395	++fdchangecnt;
		396	array_needsize (fdchanges, fdchangemax, fdchangecnt, (void));
		397	fdchanges [fdchangecnt - 1] = fd;
		398	}
		399
		400	static void
		401	fd_kill (EV_P_ int fd)
		402	{
		403	struct ev_io *w;
		404
		405	while ((w = (struct ev_io *)anfds [fd].head))
		406	{
		407	ev_io_stop (EV_A_ w);
		408	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		409	}
		410	}
		411
		412	static int
		413	fd_valid (int fd)
		414	{
		415	#ifdef WIN32
		416	return !!win32_get_osfhandle (fd);
		417	#else
		418	return fcntl (fd, F_GETFD) != -1;
		419	#endif
		420	}
		421
		422	/* called on EBADF to verify fds */
		423	static void
		424	fd_ebadf (EV_P)
		425	{
		426	int fd;
		427
		428	for (fd = 0; fd < anfdmax; ++fd)
		429	if (anfds [fd].events)
		430	if (!fd_valid (fd) == -1 && errno == EBADF)
		431	fd_kill (EV_A_ fd);
		432	}
		433
		434	/* called on ENOMEM in select/poll to kill some fds and retry */
		435	static void
		436	fd_enomem (EV_P)
		437	{
		438	int fd;
		439
		440	for (fd = anfdmax; fd--; )
		441	if (anfds [fd].events)
		442	{
		443	fd_kill (EV_A_ fd);
		444	return;
136	}	445	}
137	}	446	}
138		447
139	static struct ev_timer **timers;	448	/* usually called after fork if method needs to re-arm all fds from scratch */
140	static int timermax, timercnt;
141
142	static void	449	static void
143	upheap (int k)	450	fd_rearm_all (EV_P)
144	{	451	{
145	struct ev_timer *w = timers [k];	452	int fd;
146		453
		454	/* this should be highly optimised to not do anything but set a flag */
		455	for (fd = 0; fd < anfdmax; ++fd)
		456	if (anfds [fd].events)
		457	{
		458	anfds [fd].events = 0;
		459	fd_change (EV_A_ fd);
		460	}
		461	}
		462
		463	/*****************************************************************************/
		464
		465	static void
		466	upheap (WT *heap, int k)
		467	{
		468	WT w = heap [k];
		469
147	while (k && timers [k >> 1]->at > w->at)	470	while (k && heap [k >> 1]->at > w->at)
148	{	471	{
149	timers [k] = timers [k >> 1];	472	heap [k] = heap [k >> 1];
150	timers [k]->active = k + 1;	473	((W)heap [k])->active = k + 1;
151	k >>= 1;	474	k >>= 1;
152	}	475	}
153		476
154	timers [k] = w;	477	heap [k] = w;
155	timers [k]->active = k + 1;	478	((W)heap [k])->active = k + 1;
156		479
157	}	480	}
158		481
159	static void	482	static void
160	downheap (int k)	483	downheap (WT *heap, int N, int k)
161	{	484	{
162	struct ev_timer *w = timers [k];	485	WT w = heap [k];
163		486
164	while (k <= (timercnt >> 1))	487	while (k < (N >> 1))
165	{	488	{
166	int j = k << 1;	489	int j = k << 1;
167		490
168	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	491	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
169	++j;	492	++j;
170		493
171	if (w->at <= timers [j]->at)	494	if (w->at <= heap [j]->at)
172	break;	495	break;
173		496
174	timers [k] = timers [j];	497	heap [k] = heap [j];
175	timers [k]->active = k;	498	((W)heap [k])->active = k + 1;
176	k = j;	499	k = j;
177	}	500	}
178		501
179	timers [k] = w;	502	heap [k] = w;
180	timers [k]->active = k + 1;	503	((W)heap [k])->active = k + 1;
181	}	504	}
182		505
183	static struct ev_signal **signals;	506	/*****************************************************************************/
		507
		508	typedef struct
		509	{
		510	WL head;
		511	sig_atomic_t volatile gotsig;
		512	} ANSIG;
		513
		514	static ANSIG *signals;
184	static int signalmax, signalcnt;	515	static int signalmax;
185		516
		517	static int sigpipe [2];
		518	static sig_atomic_t volatile gotsig;
		519	static struct ev_io sigev;
		520
186	static void	521	static void
187	signals_init (struct ev_signal **base, int count)	522	signals_init (ANSIG *base, int count)
188	{	523	{
189	while (count--)	524	while (count--)
190	*base++ = 0;	525	{
191	}	526	base->head = 0;
		527	base->gotsig = 0;
192		528
		529	++base;
		530	}
		531	}
		532
		533	static void
		534	sighandler (int signum)
		535	{
		536	#if WIN32
		537	signal (signum, sighandler);
		538	#endif
		539
		540	signals [signum - 1].gotsig = 1;
		541
		542	if (!gotsig)
		543	{
		544	int old_errno = errno;
		545	gotsig = 1;
		546	write (sigpipe [1], &signum, 1);
		547	errno = old_errno;
		548	}
		549	}
		550
		551	static void
		552	sigcb (EV_P_ struct ev_io *iow, int revents)
		553	{
		554	WL w;
		555	int signum;
		556
		557	read (sigpipe [0], &revents, 1);
		558	gotsig = 0;
		559
		560	for (signum = signalmax; signum--; )
		561	if (signals [signum].gotsig)
		562	{
		563	signals [signum].gotsig = 0;
		564
		565	for (w = signals [signum].head; w; w = w->next)
		566	event (EV_A_ (W)w, EV_SIGNAL);
		567	}
		568	}
		569
		570	static void
		571	siginit (EV_P)
		572	{
		573	#ifndef WIN32
		574	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
		575	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
		576
		577	/* rather than sort out wether we really need nb, set it */
		578	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
		579	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		580	#endif
		581
		582	ev_io_set (&sigev, sigpipe [0], EV_READ);
		583	ev_io_start (EV_A_ &sigev);
		584	ev_unref (EV_A); /* child watcher should not keep loop alive */
		585	}
		586
		587	/*****************************************************************************/
		588
		589	static struct ev_child *childs [PID_HASHSIZE];
		590
		591	#ifndef WIN32
		592
		593	static struct ev_signal childev;
		594
		595	#ifndef WCONTINUED
		596	# define WCONTINUED 0
		597	#endif
		598
		599	static void
		600	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		601	{
		602	struct ev_child *w;
		603
		604	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		605	if (w->pid == pid || !w->pid)
		606	{
		607	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		608	w->rpid = pid;
		609	w->rstatus = status;
		610	event (EV_A_ (W)w, EV_CHILD);
		611	}
		612	}
		613
		614	static void
		615	childcb (EV_P_ struct ev_signal *sw, int revents)
		616	{
		617	int pid, status;
		618
		619	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		620	{
		621	/* make sure we are called again until all childs have been reaped */
		622	event (EV_A_ (W)sw, EV_SIGNAL);
		623
		624	child_reap (EV_A_ sw, pid, pid, status);
		625	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		626	}
		627	}
		628
		629	#endif
		630
		631	/*****************************************************************************/
		632
		633	#if EV_USE_KQUEUE
		634	# include "ev_kqueue.c"
		635	#endif
193	#if HAVE_EPOLL	636	#if EV_USE_EPOLL
194	# include "ev_epoll.c"	637	# include "ev_epoll.c"
195	#endif	638	#endif
		639	#if EV_USE_POLL
		640	# include "ev_poll.c"
		641	#endif
196	#if HAVE_SELECT	642	#if EV_USE_SELECT
197	# include "ev_select.c"	643	# include "ev_select.c"
198	#endif	644	#endif
199		645
200	int ev_init (int flags)	646	int
		647	ev_version_major (void)
201	{	648	{
		649	return EV_VERSION_MAJOR;
		650	}
		651
		652	int
		653	ev_version_minor (void)
		654	{
		655	return EV_VERSION_MINOR;
		656	}
		657
		658	/* return true if we are running with elevated privileges and should ignore env variables */
		659	static int
		660	enable_secure (void)
		661	{
		662	#ifdef WIN32
		663	return 0;
		664	#else
		665	return getuid () != geteuid ()
		666	|| getgid () != getegid ();
		667	#endif
		668	}
		669
		670	int
		671	ev_method (EV_P)
		672	{
		673	return method;
		674	}
		675
		676	static void
		677	loop_init (EV_P_ int methods)
		678	{
		679	if (!method)
		680	{
202	#if HAVE_MONOTONIC	681	#if EV_USE_MONOTONIC
203	{	682	{
204	struct timespec ts;	683	struct timespec ts;
205	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	684	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
206	have_monotonic = 1;	685	have_monotonic = 1;
207	}	686	}
208	#endif	687	#endif
209		688
210	ev_now = ev_time ();	689	rt_now = ev_time ();
		690	mn_now = get_clock ();
		691	now_floor = mn_now;
		692	rtmn_diff = rt_now - mn_now;
211		693
		694	if (methods == EVMETHOD_AUTO)
		695	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		696	methods = atoi (getenv ("LIBEV_METHODS"));
		697	else
		698	methods = EVMETHOD_ANY;
		699
		700	method = 0;
		701	#if EV_USE_WIN32
		702	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		703	#endif
		704	#if EV_USE_KQUEUE
		705	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		706	#endif
212	#if HAVE_EPOLL	707	#if EV_USE_EPOLL
213	if (epoll_init (flags))	708	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
214	return ev_method;
215	#endif	709	#endif
		710	#if EV_USE_POLL
		711	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		712	#endif
216	#if HAVE_SELECT	713	#if EV_USE_SELECT
217	if (select_init (flags))	714	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
218	return ev_method;
219	#endif	715	#endif
220		716
221	ev_method = EVMETHOD_NONE;	717	ev_watcher_init (&sigev, sigcb);
222	return ev_method;	718	ev_set_priority (&sigev, EV_MAXPRI);
		719	}
223	}	720	}
224		721
225	void ev_prefork (void)	722	void
226	{	723	loop_destroy (EV_P)
227	}
228
229	void ev_postfork_parent (void)
230	{
231	}
232
233	void ev_postfork_child (void)
234	{
235	#if HAVE_EPOLL
236	epoll_postfork_child ();
237	#endif
238	}
239
240	static void
241	call_pending ()
242	{	724	{
243	int i;	725	int i;
244		726
245	for (i = 0; i < pendingcnt; ++i)	727	#if EV_USE_WIN32
		728	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		729	#endif
		730	#if EV_USE_KQUEUE
		731	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		732	#endif
		733	#if EV_USE_EPOLL
		734	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		735	#endif
		736	#if EV_USE_POLL
		737	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		738	#endif
		739	#if EV_USE_SELECT
		740	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		741	#endif
		742
		743	for (i = NUMPRI; i--; )
		744	array_free (pending, [i]);
		745
		746	/* have to use the microsoft-never-gets-it-right macro */
		747	array_free_microshit (fdchange);
		748	array_free_microshit (timer);
		749	array_free_microshit (periodic);
		750	array_free_microshit (idle);
		751	array_free_microshit (prepare);
		752	array_free_microshit (check);
		753
		754	method = 0;
		755	}
		756
		757	static void
		758	loop_fork (EV_P)
		759	{
		760	#if EV_USE_EPOLL
		761	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		762	#endif
		763	#if EV_USE_KQUEUE
		764	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		765	#endif
		766
		767	if (ev_is_active (&sigev))
		768	{
		769	/* default loop */
		770
		771	ev_ref (EV_A);
		772	ev_io_stop (EV_A_ &sigev);
		773	close (sigpipe [0]);
		774	close (sigpipe [1]);
		775
		776	while (pipe (sigpipe))
		777	syserr ("(libev) error creating pipe");
		778
		779	siginit (EV_A);
246	{	780	}
247	ANPENDING *p = pendings + i;
248		781
249	if (p->w)	782	postfork = 0;
		783	}
		784
		785	#if EV_MULTIPLICITY
		786	struct ev_loop *
		787	ev_loop_new (int methods)
		788	{
		789	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		790
		791	memset (loop, 0, sizeof (struct ev_loop));
		792
		793	loop_init (EV_A_ methods);
		794
		795	if (ev_method (EV_A))
		796	return loop;
		797
		798	return 0;
		799	}
		800
		801	void
		802	ev_loop_destroy (EV_P)
		803	{
		804	loop_destroy (EV_A);
		805	ev_free (loop);
		806	}
		807
		808	void
		809	ev_loop_fork (EV_P)
		810	{
		811	postfork = 1;
		812	}
		813
		814	#endif
		815
		816	#if EV_MULTIPLICITY
		817	struct ev_loop default_loop_struct;
		818	static struct ev_loop *default_loop;
		819
		820	struct ev_loop *
		821	#else
		822	static int default_loop;
		823
		824	int
		825	#endif
		826	ev_default_loop (int methods)
		827	{
		828	if (sigpipe [0] == sigpipe [1])
		829	if (pipe (sigpipe))
		830	return 0;
		831
		832	if (!default_loop)
		833	{
		834	#if EV_MULTIPLICITY
		835	struct ev_loop *loop = default_loop = &default_loop_struct;
		836	#else
		837	default_loop = 1;
		838	#endif
		839
		840	loop_init (EV_A_ methods);
		841
		842	if (ev_method (EV_A))
250	{	843	{
251	p->w->pending = 0;	844	siginit (EV_A);
252	p->w->cb (p->w, p->events);	845
		846	#ifndef WIN32
		847	ev_signal_init (&childev, childcb, SIGCHLD);
		848	ev_set_priority (&childev, EV_MAXPRI);
		849	ev_signal_start (EV_A_ &childev);
		850	ev_unref (EV_A); /* child watcher should not keep loop alive */
		851	#endif
253	}	852	}
		853	else
		854	default_loop = 0;
		855	}
		856
		857	return default_loop;
		858	}
		859
		860	void
		861	ev_default_destroy (void)
		862	{
		863	#if EV_MULTIPLICITY
		864	struct ev_loop *loop = default_loop;
		865	#endif
		866
		867	#ifndef WIN32
		868	ev_ref (EV_A); /* child watcher */
		869	ev_signal_stop (EV_A_ &childev);
		870	#endif
		871
		872	ev_ref (EV_A); /* signal watcher */
		873	ev_io_stop (EV_A_ &sigev);
		874
		875	close (sigpipe [0]); sigpipe [0] = 0;
		876	close (sigpipe [1]); sigpipe [1] = 0;
		877
		878	loop_destroy (EV_A);
		879	}
		880
		881	void
		882	ev_default_fork (void)
		883	{
		884	#if EV_MULTIPLICITY
		885	struct ev_loop *loop = default_loop;
		886	#endif
		887
		888	if (method)
		889	postfork = 1;
		890	}
		891
		892	/*****************************************************************************/
		893
		894	static void
		895	call_pending (EV_P)
		896	{
		897	int pri;
		898
		899	for (pri = NUMPRI; pri--; )
		900	while (pendingcnt [pri])
		901	{
		902	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		903
		904	if (p->w)
		905	{
		906	p->w->pending = 0;
		907	p->w->cb (EV_A_ p->w, p->events);
		908	}
254	}	909	}
255
256	pendingcnt = 0;
257	}	910	}
258		911
259	static void	912	static void
260	timer_reify (void)	913	timers_reify (EV_P)
261	{	914	{
262	while (timercnt && timers [0]->at <= ev_now)	915	while (timercnt && ((WT)timers [0])->at <= mn_now)
263	{	916	{
264	struct ev_timer *w = timers [0];	917	struct ev_timer *w = timers [0];
265		918
		919	assert (("inactive timer on timer heap detected", ev_is_active (w)));
		920
266	/* first reschedule timer */	921	/* first reschedule or stop timer */
267	if (w->repeat)	922	if (w->repeat)
268	{	923	{
269	fprintf (stderr, "a %f now %f repeat %f, %f\n", w->at, ev_now, w->repeat, w->repeat *1e30);//D	924	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
270	if (w->is_abs)
271	w->at += floor ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
272	else
273	w->at = ev_now + w->repeat;	925	((WT)w)->at = mn_now + w->repeat;
274		926	downheap ((WT *)timers, timercnt, 0);
275	fprintf (stderr, "b %f\n", w->at);//D
276
277	downheap (0);
278	}	927	}
279	else	928	else
280	evtimer_stop (w); /* nonrepeating: stop timer */	929	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
281		930
282	event ((struct ev_watcher *)w, EV_TIMEOUT);	931	event (EV_A_ (W)w, EV_TIMEOUT);
		932	}
		933	}
		934
		935	static void
		936	periodics_reify (EV_P)
		937	{
		938	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
283	}	939	{
284	}	940	struct ev_periodic *w = periodics [0];
285		941
286	int ev_loop_done;	942	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
287		943
		944	/* first reschedule or stop timer */
		945	if (w->interval)
		946	{
		947	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
		948	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
		949	downheap ((WT *)periodics, periodiccnt, 0);
		950	}
		951	else
		952	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		953
		954	event (EV_A_ (W)w, EV_PERIODIC);
		955	}
		956	}
		957
		958	static void
		959	periodics_reschedule (EV_P)
		960	{
		961	int i;
		962
		963	/* adjust periodics after time jump */
		964	for (i = 0; i < periodiccnt; ++i)
		965	{
		966	struct ev_periodic *w = periodics [i];
		967
		968	if (w->interval)
		969	{
		970	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		971
		972	if (fabs (diff) >= 1e-4)
		973	{
		974	ev_periodic_stop (EV_A_ w);
		975	ev_periodic_start (EV_A_ w);
		976
		977	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		978	}
		979	}
		980	}
		981	}
		982
		983	inline int
		984	time_update_monotonic (EV_P)
		985	{
		986	mn_now = get_clock ();
		987
		988	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		989	{
		990	rt_now = rtmn_diff + mn_now;
		991	return 0;
		992	}
		993	else
		994	{
		995	now_floor = mn_now;
		996	rt_now = ev_time ();
		997	return 1;
		998	}
		999	}
		1000
		1001	static void
		1002	time_update (EV_P)
		1003	{
		1004	int i;
		1005
		1006	#if EV_USE_MONOTONIC
		1007	if (expect_true (have_monotonic))
		1008	{
		1009	if (time_update_monotonic (EV_A))
		1010	{
		1011	ev_tstamp odiff = rtmn_diff;
		1012
		1013	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		1014	{
		1015	rtmn_diff = rt_now - mn_now;
		1016
		1017	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1018	return; /* all is well */
		1019
		1020	rt_now = ev_time ();
		1021	mn_now = get_clock ();
		1022	now_floor = mn_now;
		1023	}
		1024
		1025	periodics_reschedule (EV_A);
		1026	/* no timer adjustment, as the monotonic clock doesn't jump */
		1027	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1028	}
		1029	}
		1030	else
		1031	#endif
		1032	{
		1033	rt_now = ev_time ();
		1034
		1035	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		1036	{
		1037	periodics_reschedule (EV_A);
		1038
		1039	/* adjust timers. this is easy, as the offset is the same for all */
		1040	for (i = 0; i < timercnt; ++i)
		1041	((WT)timers [i])->at += rt_now - mn_now;
		1042	}
		1043
		1044	mn_now = rt_now;
		1045	}
		1046	}
		1047
		1048	void
		1049	ev_ref (EV_P)
		1050	{
		1051	++activecnt;
		1052	}
		1053
		1054	void
		1055	ev_unref (EV_P)
		1056	{
		1057	--activecnt;
		1058	}
		1059
		1060	static int loop_done;
		1061
		1062	void
288	int ev_loop (int flags)	1063	ev_loop (EV_P_ int flags)
289	{	1064	{
290	double block;	1065	double block;
291	ev_loop_done = flags & EVLOOP_ONESHOT;	1066	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
292		1067
293	do	1068	do
294	{	1069	{
		1070	/* queue check watchers (and execute them) */
		1071	if (expect_false (preparecnt))
		1072	{
		1073	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1074	call_pending (EV_A);
		1075	}
		1076
		1077	/* we might have forked, so reify kernel state if necessary */
		1078	if (expect_false (postfork))
		1079	loop_fork (EV_A);
		1080
295	/* update fd-related kernel structures */	1081	/* update fd-related kernel structures */
296	method_reify (); fdchangecnt = 0;	1082	fd_reify (EV_A);
297		1083
298	/* calculate blocking time */	1084	/* calculate blocking time */
		1085
		1086	/* we only need this for !monotonic clockor timers, but as we basically
		1087	always have timers, we just calculate it always */
		1088	#if EV_USE_MONOTONIC
		1089	if (expect_true (have_monotonic))
		1090	time_update_monotonic (EV_A);
		1091	else
		1092	#endif
		1093	{
299	ev_now = ev_time ();	1094	rt_now = ev_time ();
		1095	mn_now = rt_now;
		1096	}
300		1097
301	if (flags & EVLOOP_NONBLOCK)	1098	if (flags & EVLOOP_NONBLOCK || idlecnt)
302	block = 0.;	1099	block = 0.;
303	else if (!timercnt)
304	block = MAX_BLOCKTIME;
305	else	1100	else
306	{	1101	{
		1102	block = MAX_BLOCKTIME;
		1103
		1104	if (timercnt)
		1105	{
307	block = timers [0]->at - ev_now + method_fudge;	1106	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
		1107	if (block > to) block = to;
		1108	}
		1109
		1110	if (periodiccnt)
		1111	{
		1112	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
		1113	if (block > to) block = to;
		1114	}
		1115
308	if (block < 0.) block = 0.;	1116	if (block < 0.) block = 0.;
309	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;
310	}	1117	}
311		1118
312	fprintf (stderr, "block %f\n", block);//D
313	method_poll (block);	1119	method_poll (EV_A_ block);
314		1120
		1121	/* update rt_now, do magic */
		1122	time_update (EV_A);
		1123
315	/* put pending timers into pendign queue and reschedule them */	1124	/* queue pending timers and reschedule them */
316	timer_reify ();	1125	timers_reify (EV_A); /* relative timers called last */
		1126	periodics_reify (EV_A); /* absolute timers called first */
317		1127
318	ev_now = ev_time ();	1128	/* queue idle watchers unless io or timers are pending */
		1129	if (!pendingcnt)
		1130	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		1131
		1132	/* queue check watchers, to be executed first */
		1133	if (checkcnt)
		1134	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1135
319	call_pending ();	1136	call_pending (EV_A);
320	}	1137	}
321	while (!ev_loop_done);	1138	while (activecnt && !loop_done);
322	}
323		1139
324	static void	1140	if (loop_done != 2)
325	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1141	loop_done = 0;
		1142	}
		1143
		1144	void
		1145	ev_unloop (EV_P_ int how)
		1146	{
		1147	loop_done = how;
		1148	}
		1149
		1150	/*****************************************************************************/
		1151
		1152	inline void
		1153	wlist_add (WL *head, WL elem)
326	{	1154	{
327	elem->next = *head;	1155	elem->next = *head;
328	*head = elem;	1156	*head = elem;
329	}	1157	}
330		1158
331	static void	1159	inline void
332	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1160	wlist_del (WL *head, WL elem)
333	{	1161	{
334	while (*head)	1162	while (*head)
335	{	1163	{
336	if (*head == elem)	1164	if (*head == elem)
337	{	1165	{
…		…
341		1169
342	head = &(*head)->next;	1170	head = &(*head)->next;
343	}	1171	}
344	}	1172	}
345		1173
346	static void	1174	inline void
347	ev_start (struct ev_watcher *w, int active)	1175	ev_clear_pending (EV_P_ W w)
348	{	1176	{
		1177	if (w->pending)
		1178	{
		1179	pendings [ABSPRI (w)][w->pending - 1].w = 0;
349	w->pending = 0;	1180	w->pending = 0;
		1181	}
		1182	}
		1183
		1184	inline void
		1185	ev_start (EV_P_ W w, int active)
		1186	{
		1187	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1188	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1189
350	w->active = active;	1190	w->active = active;
		1191	ev_ref (EV_A);
351	}	1192	}
352		1193
353	static void	1194	inline void
354	ev_stop (struct ev_watcher *w)	1195	ev_stop (EV_P_ W w)
355	{	1196	{
356	if (w->pending)	1197	ev_unref (EV_A);
357	pendings [w->pending - 1].w = 0;
358
359	w->active = 0;	1198	w->active = 0;
360	/* nop */
361	}	1199	}
362		1200
		1201	/*****************************************************************************/
		1202
363	void	1203	void
364	evio_start (struct ev_io *w)	1204	ev_io_start (EV_P_ struct ev_io *w)
365	{	1205	{
		1206	int fd = w->fd;
		1207
366	if (ev_is_active (w))	1208	if (ev_is_active (w))
367	return;	1209	return;
368		1210
369	int fd = w->fd;	1211	assert (("ev_io_start called with negative fd", fd >= 0));
370		1212
371	ev_start ((struct ev_watcher *)w, 1);	1213	ev_start (EV_A_ (W)w, 1);
372	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1214	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
373	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	1215	wlist_add ((WL *)&anfds[fd].head, (WL)w);
374		1216
375	++fdchangecnt;	1217	fd_change (EV_A_ fd);
376	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
377	fdchanges [fdchangecnt - 1] = fd;
378	}	1218	}
379		1219
380	void	1220	void
381	evio_stop (struct ev_io *w)	1221	ev_io_stop (EV_P_ struct ev_io *w)
382	{	1222	{
		1223	ev_clear_pending (EV_A_ (W)w);
383	if (!ev_is_active (w))	1224	if (!ev_is_active (w))
384	return;	1225	return;
385		1226
386	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	1227	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
387	ev_stop ((struct ev_watcher *)w);	1228	ev_stop (EV_A_ (W)w);
388		1229
389	++fdchangecnt;	1230	fd_change (EV_A_ w->fd);
390	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
391	fdchanges [fdchangecnt - 1] = w->fd;
392	}	1231	}
393		1232
394	void	1233	void
395	evtimer_start (struct ev_timer *w)	1234	ev_timer_start (EV_P_ struct ev_timer *w)
396	{	1235	{
397	if (ev_is_active (w))	1236	if (ev_is_active (w))
398	return;	1237	return;
399		1238
400	fprintf (stderr, "t1 %f a %d\n", w->at, w->is_abs);//D	1239	((WT)w)->at += mn_now;
401	if (w->is_abs)	1240
		1241	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1242
		1243	ev_start (EV_A_ (W)w, ++timercnt);
		1244	array_needsize (timers, timermax, timercnt, (void));
		1245	timers [timercnt - 1] = w;
		1246	upheap ((WT *)timers, timercnt - 1);
		1247
		1248	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1249	}
		1250
		1251	void
		1252	ev_timer_stop (EV_P_ struct ev_timer *w)
		1253	{
		1254	ev_clear_pending (EV_A_ (W)w);
		1255	if (!ev_is_active (w))
		1256	return;
		1257
		1258	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1259
		1260	if (((W)w)->active < timercnt--)
		1261	{
		1262	timers [((W)w)->active - 1] = timers [timercnt];
		1263	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1264	}
		1265
		1266	((WT)w)->at = w->repeat;
		1267
		1268	ev_stop (EV_A_ (W)w);
		1269	}
		1270
		1271	void
		1272	ev_timer_again (EV_P_ struct ev_timer *w)
		1273	{
		1274	if (ev_is_active (w))
402	{	1275	{
403	if (w->repeat)	1276	if (w->repeat)
404	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1277	{
		1278	((WT)w)->at = mn_now + w->repeat;
		1279	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1280	}
		1281	else
		1282	ev_timer_stop (EV_A_ w);
		1283	}
		1284	else if (w->repeat)
		1285	ev_timer_start (EV_A_ w);
		1286	}
		1287
		1288	void
		1289	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1290	{
		1291	if (ev_is_active (w))
		1292	return;
		1293
		1294	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1295
		1296	/* this formula differs from the one in periodic_reify because we do not always round up */
		1297	if (w->interval)
		1298	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1299
		1300	ev_start (EV_A_ (W)w, ++periodiccnt);
		1301	array_needsize (periodics, periodicmax, periodiccnt, (void));
		1302	periodics [periodiccnt - 1] = w;
		1303	upheap ((WT *)periodics, periodiccnt - 1);
		1304
		1305	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1306	}
		1307
		1308	void
		1309	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1310	{
		1311	ev_clear_pending (EV_A_ (W)w);
		1312	if (!ev_is_active (w))
		1313	return;
		1314
		1315	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1316
		1317	if (((W)w)->active < periodiccnt--)
405	}	1318	{
		1319	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1320	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
		1321	}
		1322
		1323	ev_stop (EV_A_ (W)w);
		1324	}
		1325
		1326	void
		1327	ev_idle_start (EV_P_ struct ev_idle *w)
		1328	{
		1329	if (ev_is_active (w))
		1330	return;
		1331
		1332	ev_start (EV_A_ (W)w, ++idlecnt);
		1333	array_needsize (idles, idlemax, idlecnt, (void));
		1334	idles [idlecnt - 1] = w;
		1335	}
		1336
		1337	void
		1338	ev_idle_stop (EV_P_ struct ev_idle *w)
		1339	{
		1340	ev_clear_pending (EV_A_ (W)w);
		1341	if (ev_is_active (w))
		1342	return;
		1343
		1344	idles [((W)w)->active - 1] = idles [--idlecnt];
		1345	ev_stop (EV_A_ (W)w);
		1346	}
		1347
		1348	void
		1349	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1350	{
		1351	if (ev_is_active (w))
		1352	return;
		1353
		1354	ev_start (EV_A_ (W)w, ++preparecnt);
		1355	array_needsize (prepares, preparemax, preparecnt, (void));
		1356	prepares [preparecnt - 1] = w;
		1357	}
		1358
		1359	void
		1360	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1361	{
		1362	ev_clear_pending (EV_A_ (W)w);
		1363	if (ev_is_active (w))
		1364	return;
		1365
		1366	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1367	ev_stop (EV_A_ (W)w);
		1368	}
		1369
		1370	void
		1371	ev_check_start (EV_P_ struct ev_check *w)
		1372	{
		1373	if (ev_is_active (w))
		1374	return;
		1375
		1376	ev_start (EV_A_ (W)w, ++checkcnt);
		1377	array_needsize (checks, checkmax, checkcnt, (void));
		1378	checks [checkcnt - 1] = w;
		1379	}
		1380
		1381	void
		1382	ev_check_stop (EV_P_ struct ev_check *w)
		1383	{
		1384	ev_clear_pending (EV_A_ (W)w);
		1385	if (ev_is_active (w))
		1386	return;
		1387
		1388	checks [((W)w)->active - 1] = checks [--checkcnt];
		1389	ev_stop (EV_A_ (W)w);
		1390	}
		1391
		1392	#ifndef SA_RESTART
		1393	# define SA_RESTART 0
		1394	#endif
		1395
		1396	void
		1397	ev_signal_start (EV_P_ struct ev_signal *w)
		1398	{
		1399	#if EV_MULTIPLICITY
		1400	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1401	#endif
		1402	if (ev_is_active (w))
		1403	return;
		1404
		1405	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1406
		1407	ev_start (EV_A_ (W)w, 1);
		1408	array_needsize (signals, signalmax, w->signum, signals_init);
		1409	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
		1410
		1411	if (!((WL)w)->next)
		1412	{
		1413	#if WIN32
		1414	signal (w->signum, sighandler);
		1415	#else
		1416	struct sigaction sa;
		1417	sa.sa_handler = sighandler;
		1418	sigfillset (&sa.sa_mask);
		1419	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1420	sigaction (w->signum, &sa, 0);
		1421	#endif
		1422	}
		1423	}
		1424
		1425	void
		1426	ev_signal_stop (EV_P_ struct ev_signal *w)
		1427	{
		1428	ev_clear_pending (EV_A_ (W)w);
		1429	if (!ev_is_active (w))
		1430	return;
		1431
		1432	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
		1433	ev_stop (EV_A_ (W)w);
		1434
		1435	if (!signals [w->signum - 1].head)
		1436	signal (w->signum, SIG_DFL);
		1437	}
		1438
		1439	void
		1440	ev_child_start (EV_P_ struct ev_child *w)
		1441	{
		1442	#if EV_MULTIPLICITY
		1443	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1444	#endif
		1445	if (ev_is_active (w))
		1446	return;
		1447
		1448	ev_start (EV_A_ (W)w, 1);
		1449	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1450	}
		1451
		1452	void
		1453	ev_child_stop (EV_P_ struct ev_child *w)
		1454	{
		1455	ev_clear_pending (EV_A_ (W)w);
		1456	if (ev_is_active (w))
		1457	return;
		1458
		1459	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1460	ev_stop (EV_A_ (W)w);
		1461	}
		1462
		1463	/*****************************************************************************/
		1464
		1465	struct ev_once
		1466	{
		1467	struct ev_io io;
		1468	struct ev_timer to;
		1469	void (*cb)(int revents, void *arg);
		1470	void *arg;
		1471	};
		1472
		1473	static void
		1474	once_cb (EV_P_ struct ev_once *once, int revents)
		1475	{
		1476	void (*cb)(int revents, void *arg) = once->cb;
		1477	void *arg = once->arg;
		1478
		1479	ev_io_stop (EV_A_ &once->io);
		1480	ev_timer_stop (EV_A_ &once->to);
		1481	ev_free (once);
		1482
		1483	cb (revents, arg);
		1484	}
		1485
		1486	static void
		1487	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1488	{
		1489	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1490	}
		1491
		1492	static void
		1493	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1494	{
		1495	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1496	}
		1497
		1498	void
		1499	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1500	{
		1501	struct ev_once *once = ev_malloc (sizeof (struct ev_once));
		1502
		1503	if (!once)
		1504	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
406	else	1505	else
407	w->at += ev_now;	1506	{
408	fprintf (stderr, "t2 %f a %d\n", w->at, w->is_abs);//D	1507	once->cb = cb;
		1508	once->arg = arg;
409		1509
410	ev_start ((struct ev_watcher *)w, ++timercnt);	1510	ev_watcher_init (&once->io, once_cb_io);
411	array_needsize (timers, timermax, timercnt, );	1511	if (fd >= 0)
412	timers [timercnt - 1] = w;	1512	{
413	upheap (timercnt - 1);	1513	ev_io_set (&once->io, fd, events);
414	}	1514	ev_io_start (EV_A_ &once->io);
		1515	}
415		1516
416	void	1517	ev_watcher_init (&once->to, once_cb_to);
417	evtimer_stop (struct ev_timer *w)	1518	if (timeout >= 0.)
418	{	1519	{
419	if (!ev_is_active (w))	1520	ev_timer_set (&once->to, timeout, 0.);
420	return;	1521	ev_timer_start (EV_A_ &once->to);
421		1522	}
422	timers [w->active - 1] = timers [--timercnt];	1523	}
423	downheap (w->active - 1);
424	ev_stop ((struct ev_watcher *)w);
425	}	1524	}
426		1525
427	void
428	evsignal_start (struct ev_signal *w)
429	{
430	if (ev_is_active (w))
431	return;
432
433	ev_start ((struct ev_watcher *)w, 1);
434	array_needsize (signals, signalmax, w->signum, signals_init);
435	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);
436	}
437
438	void
439	evsignal_stop (struct ev_signal *w)
440	{
441	if (!ev_is_active (w))
442	return;
443
444	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);
445	ev_stop ((struct ev_watcher *)w);
446	}
447
448	/*****************************************************************************/
449	#if 1
450
451	static void
452	sin_cb (struct ev_io *w, int revents)
453	{
454	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
455	}
456
457	static void
458	ocb (struct ev_timer *w, int revents)
459	{
460	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
461	}
462
463	int main (void)
464	{
465	struct ev_io sin;
466
467	ev_init (0);
468
469	evw_init (&sin, sin_cb, 55);
470	evio_set (&sin, 0, EV_READ);
471	evio_start (&sin);
472
473	struct ev_timer t1;
474	evw_init (&t1, ocb, 1);
475	evtimer_set_rel (&t1, 1, 0);
476	evtimer_start (&t1);
477
478	struct ev_timer t2;
479	evw_init (&t2, ocb, 2);
480	evtimer_set_abs (&t2, ev_time () + 2, 0);
481	evtimer_start (&t2);
482
483	ev_loop (0);
484
485	return 0;
486	}
487
488	#endif
489
490
491
492

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