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Comparing libev/ev.c (file contents):
Revision 1.18 by root, Wed Oct 31 16:29:52 2007 UTC vs.
Revision 1.80 by root, Fri Nov 9 15:30:59 2007 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
…		…
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	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
29		56
30	#include <math.h>	57	#include <math.h>
31	#include <stdlib.h>	58	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	59	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	60	#include <stddef.h>
36		61
37	#include <stdio.h>	62	#include <stdio.h>
38		63
39	#include <assert.h>	64	#include <assert.h>
40	#include <errno.h>	65	#include <errno.h>
41	#include <sys/time.h>	66	#include <sys/types.h>
42	#include <time.h>	67	#include <time.h>
43		68
44	#define HAVE_EPOLL 1	69	#include <signal.h>
45		70
		71	#ifndef WIN32
		72	# include <unistd.h>
		73	# include <sys/time.h>
		74	# include <sys/wait.h>
		75	#endif
		76	/**/
		77
46	#ifndef HAVE_MONOTONIC	78	#ifndef EV_USE_MONOTONIC
47	# ifdef CLOCK_MONOTONIC
48	# define HAVE_MONOTONIC 1	79	# define EV_USE_MONOTONIC 1
		80	#endif
		81
		82	#ifndef EV_USE_SELECT
		83	# define EV_USE_SELECT 1
		84	#endif
		85
		86	#ifndef EV_USE_POLL
		87	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		88	#endif
		89
		90	#ifndef EV_USE_EPOLL
		91	# define EV_USE_EPOLL 0
		92	#endif
		93
		94	#ifndef EV_USE_KQUEUE
		95	# define EV_USE_KQUEUE 0
		96	#endif
		97
		98	#ifndef EV_USE_WIN32
		99	# ifdef WIN32
		100	# define EV_USE_WIN32 0 /* it does not exist, use select */
		101	# undef EV_USE_SELECT
		102	# define EV_USE_SELECT 1
		103	# else
		104	# define EV_USE_WIN32 0
49	# endif	105	# endif
50	#endif	106	#endif
51		107
52	#ifndef HAVE_SELECT
53	# define HAVE_SELECT 1
54	#endif
55
56	#ifndef HAVE_EPOLL
57	# define HAVE_EPOLL 0
58	#endif
59
60	#ifndef HAVE_REALTIME	108	#ifndef EV_USE_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	109	# define EV_USE_REALTIME 1
62	#endif	110	#endif
		111
		112	/**/
		113
		114	#ifndef CLOCK_MONOTONIC
		115	# undef EV_USE_MONOTONIC
		116	# define EV_USE_MONOTONIC 0
		117	#endif
		118
		119	#ifndef CLOCK_REALTIME
		120	# undef EV_USE_REALTIME
		121	# define EV_USE_REALTIME 0
		122	#endif
		123
		124	/**/
63		125
64	#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) */
65	#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 */
66		130
67	#include "ev.h"	131	#include "ev.h"
		132
		133	#if __GNUC__ >= 3
		134	# define expect(expr,value) __builtin_expect ((expr),(value))
		135	# define inline inline
		136	#else
		137	# define expect(expr,value) (expr)
		138	# define inline static
		139	#endif
		140
		141	#define expect_false(expr) expect ((expr) != 0, 0)
		142	#define expect_true(expr) expect ((expr) != 0, 1)
		143
		144	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		145	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
68		146
69	typedef struct ev_watcher *W;	147	typedef struct ev_watcher *W;
70	typedef struct ev_watcher_list *WL;	148	typedef struct ev_watcher_list *WL;
71	typedef struct ev_watcher_time *WT;	149	typedef struct ev_watcher_time *WT;
72		150
73	static ev_tstamp now, diff; /* monotonic clock */	151	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
74	ev_tstamp ev_now;
75	int ev_method;
76		152
77	static int have_monotonic; /* runtime */	153	#include "ev_win32.c"
78
79	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
80	static void (*method_modify)(int fd, int oev, int nev);
81	static void (*method_poll)(ev_tstamp timeout);
82		154
83	/*****************************************************************************/	155	/*****************************************************************************/
84		156
85	ev_tstamp	157	static void (*syserr_cb)(const char *msg);
		158
		159	void ev_set_syserr_cb (void (*cb)(const char *msg))
		160	{
		161	syserr_cb = cb;
		162	}
		163
		164	static void
		165	syserr (const char *msg)
		166	{
		167	if (!msg)
		168	msg = "(libev) system error";
		169
		170	if (syserr_cb)
		171	syserr_cb (msg);
		172	else
		173	{
		174	perror (msg);
		175	abort ();
		176	}
		177	}
		178
		179	static void *(*alloc)(void *ptr, long size);
		180
		181	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		182	{
		183	alloc = cb;
		184	}
		185
		186	static void *
		187	ev_realloc (void *ptr, long size)
		188	{
		189	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		190
		191	if (!ptr && size)
		192	{
		193	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		194	abort ();
		195	}
		196
		197	return ptr;
		198	}
		199
		200	#define ev_malloc(size) ev_realloc (0, (size))
		201	#define ev_free(ptr) ev_realloc ((ptr), 0)
		202
		203	/*****************************************************************************/
		204
		205	typedef struct
		206	{
		207	WL head;
		208	unsigned char events;
		209	unsigned char reify;
		210	} ANFD;
		211
		212	typedef struct
		213	{
		214	W w;
		215	int events;
		216	} ANPENDING;
		217
		218	#if EV_MULTIPLICITY
		219
		220	struct ev_loop
		221	{
		222	#define VAR(name,decl) decl;
		223	#include "ev_vars.h"
		224	#undef VAR
		225	};
		226	#include "ev_wrap.h"
		227
		228	struct ev_loop default_loop_struct;
		229	static struct ev_loop *default_loop;
		230
		231	#else
		232
		233	#define VAR(name,decl) static decl;
		234	#include "ev_vars.h"
		235	#undef VAR
		236
		237	static int default_loop;
		238
		239	#endif
		240
		241	/*****************************************************************************/
		242
		243	inline ev_tstamp
86	ev_time (void)	244	ev_time (void)
87	{	245	{
88	#if HAVE_REALTIME	246	#if EV_USE_REALTIME
89	struct timespec ts;	247	struct timespec ts;
90	clock_gettime (CLOCK_REALTIME, &ts);	248	clock_gettime (CLOCK_REALTIME, &ts);
91	return ts.tv_sec + ts.tv_nsec * 1e-9;	249	return ts.tv_sec + ts.tv_nsec * 1e-9;
92	#else	250	#else
93	struct timeval tv;	251	struct timeval tv;
94	gettimeofday (&tv, 0);	252	gettimeofday (&tv, 0);
95	return tv.tv_sec + tv.tv_usec * 1e-6;	253	return tv.tv_sec + tv.tv_usec * 1e-6;
96	#endif	254	#endif
97	}	255	}
98		256
99	static ev_tstamp	257	inline ev_tstamp
100	get_clock (void)	258	get_clock (void)
101	{	259	{
102	#if HAVE_MONOTONIC	260	#if EV_USE_MONOTONIC
103	if (have_monotonic)	261	if (expect_true (have_monotonic))
104	{	262	{
105	struct timespec ts;	263	struct timespec ts;
106	clock_gettime (CLOCK_MONOTONIC, &ts);	264	clock_gettime (CLOCK_MONOTONIC, &ts);
107	return ts.tv_sec + ts.tv_nsec * 1e-9;	265	return ts.tv_sec + ts.tv_nsec * 1e-9;
108	}	266	}
109	#endif	267	#endif
110		268
111	return ev_time ();	269	return ev_time ();
112	}	270	}
113		271
		272	ev_tstamp
		273	ev_now (EV_P)
		274	{
		275	return rt_now;
		276	}
		277
		278	#define array_roundsize(type,n) ((n) | 4 & ~3)
		279
114	#define array_needsize(base,cur,cnt,init) \	280	#define array_needsize(type,base,cur,cnt,init) \
115	if ((cnt) > cur) \	281	if (expect_false ((cnt) > cur)) \
116	{ \	282	{ \
117	int newcnt = cur ? cur << 1 : 16; \	283	int newcnt = cur; \
		284	do \
		285	{ \
		286	newcnt = array_roundsize (type, newcnt << 1); \
		287	} \
		288	while ((cnt) > newcnt); \
		289	\
118	base = realloc (base, sizeof (*base) * (newcnt)); \	290	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
119	init (base + cur, newcnt - cur); \	291	init (base + cur, newcnt - cur); \
120	cur = newcnt; \	292	cur = newcnt; \
121	}	293	}
		294
		295	#define array_slim(type,stem) \
		296	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		297	{ \
		298	stem ## max = array_roundsize (stem ## cnt >> 1); \
		299	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		300	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		301	}
		302
		303	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		304	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		305	#define array_free_microshit(stem) \
		306	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		307
		308	#define array_free(stem, idx) \
		309	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
122		310
123	/*****************************************************************************/	311	/*****************************************************************************/
124		312
125	typedef struct
126	{
127	struct ev_io *head;
128	unsigned char wev, rev; /* want, received event set */
129	} ANFD;
130
131	static ANFD *anfds;
132	static int anfdmax;
133
134	static int *fdchanges;
135	static int fdchangemax, fdchangecnt;
136
137	static void	313	static void
138	anfds_init (ANFD *base, int count)	314	anfds_init (ANFD *base, int count)
139	{	315	{
140	while (count--)	316	while (count--)
141	{	317	{
142	base->head = 0;	318	base->head = 0;
143	base->wev = base->rev = EV_NONE;	319	base->events = EV_NONE;
		320	base->reify = 0;
		321
144	++base;	322	++base;
145	}	323	}
146	}	324	}
147		325
148	typedef struct	326	void
		327	ev_feed_event (EV_P_ void *w, int revents)
149	{	328	{
150	W w;	329	W w_ = (W)w;
151	int events;
152	} ANPENDING;
153		330
154	static ANPENDING *pendings;	331	if (w_->pending)
155	static int pendingmax, pendingcnt;
156
157	static void
158	event (W w, int events)
159	{
160	if (w->active)
161	{	332	{
162	w->pending = ++pendingcnt;
163	array_needsize (pendings, pendingmax, pendingcnt, );
164	pendings [pendingcnt - 1].w = w;
165	pendings [pendingcnt - 1].events = events;	333	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		334	return;
166	}	335	}
167	}
168		336
		337	w_->pending = ++pendingcnt [ABSPRI (w_)];
		338	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
		339	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		340	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		341	}
		342
169	static void	343	static void
		344	queue_events (EV_P_ W *events, int eventcnt, int type)
		345	{
		346	int i;
		347
		348	for (i = 0; i < eventcnt; ++i)
		349	ev_feed_event (EV_A_ events [i], type);
		350	}
		351
		352	inline void
170	fd_event (int fd, int events)	353	fd_event (EV_P_ int fd, int revents)
171	{	354	{
172	ANFD *anfd = anfds + fd;	355	ANFD *anfd = anfds + fd;
173	struct ev_io *w;	356	struct ev_io *w;
174		357
175	for (w = anfd->head; w; w = w->next)	358	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
176	{	359	{
177	int ev = w->events & events;	360	int ev = w->events & revents;
178		361
179	if (ev)	362	if (ev)
180	event ((W)w, ev);	363	ev_feed_event (EV_A_ (W)w, ev);
181	}	364	}
182	}	365	}
183		366
		367	void
		368	ev_feed_fd_event (EV_P_ int fd, int revents)
		369	{
		370	fd_event (EV_A_ fd, revents);
		371	}
		372
		373	/*****************************************************************************/
		374
184	static void	375	static void
185	queue_events (W *events, int eventcnt, int type)	376	fd_reify (EV_P)
186	{	377	{
187	int i;	378	int i;
188		379
189	for (i = 0; i < eventcnt; ++i)	380	for (i = 0; i < fdchangecnt; ++i)
190	event (events [i], type);	381	{
		382	int fd = fdchanges [i];
		383	ANFD *anfd = anfds + fd;
		384	struct ev_io *w;
		385
		386	int events = 0;
		387
		388	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		389	events |= w->events;
		390
		391	anfd->reify = 0;
		392
		393	method_modify (EV_A_ fd, anfd->events, events);
		394	anfd->events = events;
		395	}
		396
		397	fdchangecnt = 0;
		398	}
		399
		400	static void
		401	fd_change (EV_P_ int fd)
		402	{
		403	if (anfds [fd].reify)
		404	return;
		405
		406	anfds [fd].reify = 1;
		407
		408	++fdchangecnt;
		409	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		410	fdchanges [fdchangecnt - 1] = fd;
		411	}
		412
		413	static void
		414	fd_kill (EV_P_ int fd)
		415	{
		416	struct ev_io *w;
		417
		418	while ((w = (struct ev_io *)anfds [fd].head))
		419	{
		420	ev_io_stop (EV_A_ w);
		421	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		422	}
		423	}
		424
		425	static int
		426	fd_valid (int fd)
		427	{
		428	#ifdef WIN32
		429	return !!win32_get_osfhandle (fd);
		430	#else
		431	return fcntl (fd, F_GETFD) != -1;
		432	#endif
		433	}
		434
		435	/* called on EBADF to verify fds */
		436	static void
		437	fd_ebadf (EV_P)
		438	{
		439	int fd;
		440
		441	for (fd = 0; fd < anfdmax; ++fd)
		442	if (anfds [fd].events)
		443	if (!fd_valid (fd) == -1 && errno == EBADF)
		444	fd_kill (EV_A_ fd);
		445	}
		446
		447	/* called on ENOMEM in select/poll to kill some fds and retry */
		448	static void
		449	fd_enomem (EV_P)
		450	{
		451	int fd;
		452
		453	for (fd = anfdmax; fd--; )
		454	if (anfds [fd].events)
		455	{
		456	fd_kill (EV_A_ fd);
		457	return;
		458	}
		459	}
		460
		461	/* usually called after fork if method needs to re-arm all fds from scratch */
		462	static void
		463	fd_rearm_all (EV_P)
		464	{
		465	int fd;
		466
		467	/* this should be highly optimised to not do anything but set a flag */
		468	for (fd = 0; fd < anfdmax; ++fd)
		469	if (anfds [fd].events)
		470	{
		471	anfds [fd].events = 0;
		472	fd_change (EV_A_ fd);
		473	}
191	}	474	}
192		475
193	/*****************************************************************************/	476	/*****************************************************************************/
194		477
195	static struct ev_timer **timers;
196	static int timermax, timercnt;
197
198	static struct ev_periodic **periodics;
199	static int periodicmax, periodiccnt;
200
201	static void	478	static void
202	upheap (WT *timers, int k)	479	upheap (WT *heap, int k)
203	{	480	{
204	WT w = timers [k];	481	WT w = heap [k];
205		482
206	while (k && timers [k >> 1]->at > w->at)	483	while (k && heap [k >> 1]->at > w->at)
207	{	484	{
208	timers [k] = timers [k >> 1];	485	heap [k] = heap [k >> 1];
209	timers [k]->active = k + 1;	486	((W)heap [k])->active = k + 1;
210	k >>= 1;	487	k >>= 1;
211	}	488	}
212		489
213	timers [k] = w;	490	heap [k] = w;
214	timers [k]->active = k + 1;	491	((W)heap [k])->active = k + 1;
215		492
216	}	493	}
217		494
218	static void	495	static void
219	downheap (WT *timers, int N, int k)	496	downheap (WT *heap, int N, int k)
220	{	497	{
221	WT w = timers [k];	498	WT w = heap [k];
222		499
223	while (k < (N >> 1))	500	while (k < (N >> 1))
224	{	501	{
225	int j = k << 1;	502	int j = k << 1;
226		503
227	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	504	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
228	++j;	505	++j;
229		506
230	if (w->at <= timers [j]->at)	507	if (w->at <= heap [j]->at)
231	break;	508	break;
232		509
233	timers [k] = timers [j];	510	heap [k] = heap [j];
234	timers [k]->active = k + 1;	511	((W)heap [k])->active = k + 1;
235	k = j;	512	k = j;
236	}	513	}
237		514
238	timers [k] = w;	515	heap [k] = w;
239	timers [k]->active = k + 1;	516	((W)heap [k])->active = k + 1;
240	}	517	}
241		518
242	/*****************************************************************************/	519	/*****************************************************************************/
243		520
244	typedef struct	521	typedef struct
245	{	522	{
246	struct ev_signal *head;	523	WL head;
247	sig_atomic_t gotsig;	524	sig_atomic_t volatile gotsig;
248	} ANSIG;	525	} ANSIG;
249		526
250	static ANSIG *signals;	527	static ANSIG *signals;
251	static int signalmax;	528	static int signalmax;
252		529
253	static int sigpipe [2];	530	static int sigpipe [2];
254	static sig_atomic_t gotsig;	531	static sig_atomic_t volatile gotsig;
255	static struct ev_io sigev;	532	static struct ev_io sigev;
256		533
257	static void	534	static void
258	signals_init (ANSIG *base, int count)	535	signals_init (ANSIG *base, int count)
259	{	536	{
260	while (count--)	537	while (count--)
261	{	538	{
262	base->head = 0;	539	base->head = 0;
263	base->gotsig = 0;	540	base->gotsig = 0;
		541
264	++base;	542	++base;
265	}	543	}
266	}	544	}
267		545
268	static void	546	static void
269	sighandler (int signum)	547	sighandler (int signum)
270	{	548	{
		549	#if WIN32
		550	signal (signum, sighandler);
		551	#endif
		552
271	signals [signum - 1].gotsig = 1;	553	signals [signum - 1].gotsig = 1;
272		554
273	if (!gotsig)	555	if (!gotsig)
274	{	556	{
		557	int old_errno = errno;
275	gotsig = 1;	558	gotsig = 1;
		559	#ifdef WIN32
		560	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		561	#else
276	write (sigpipe [1], &gotsig, 1);	562	write (sigpipe [1], &signum, 1);
		563	#endif
		564	errno = old_errno;
277	}	565	}
278	}	566	}
279		567
		568	void
		569	ev_feed_signal_event (EV_P_ int signum)
		570	{
		571	WL w;
		572
		573	#if EV_MULTIPLICITY
		574	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		575	#endif
		576
		577	--signum;
		578
		579	if (signum < 0 || signum >= signalmax)
		580	return;
		581
		582	signals [signum].gotsig = 0;
		583
		584	for (w = signals [signum].head; w; w = w->next)
		585	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		586	}
		587
280	static void	588	static void
281	sigcb (struct ev_io *iow, int revents)	589	sigcb (EV_P_ struct ev_io *iow, int revents)
282	{	590	{
283	struct ev_signal *w;
284	int sig;	591	int signum;
285		592
		593	#ifdef WIN32
		594	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		595	#else
		596	read (sigpipe [0], &revents, 1);
		597	#endif
286	gotsig = 0;	598	gotsig = 0;
287	read (sigpipe [0], &revents, 1);
288		599
289	for (sig = signalmax; sig--; )	600	for (signum = signalmax; signum--; )
290	if (signals [sig].gotsig)	601	if (signals [signum].gotsig)
291	{	602	ev_feed_signal_event (EV_A_ signum + 1);
292	signals [sig].gotsig = 0;
293
294	for (w = signals [sig].head; w; w = w->next)
295	event ((W)w, EV_SIGNAL);
296	}
297	}	603	}
298		604
299	static void	605	static void
300	siginit (void)	606	siginit (EV_P)
301	{	607	{
		608	#ifndef WIN32
302	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	609	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
303	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	610	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
304		611
305	/* rather than sort out wether we really need nb, set it */	612	/* rather than sort out wether we really need nb, set it */
306	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	613	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
307	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	614	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		615	#endif
308		616
309	evio_set (&sigev, sigpipe [0], EV_READ);	617	ev_io_set (&sigev, sigpipe [0], EV_READ);
310	evio_start (&sigev);	618	ev_io_start (EV_A_ &sigev);
		619	ev_unref (EV_A); /* child watcher should not keep loop alive */
311	}	620	}
312		621
313	/*****************************************************************************/	622	/*****************************************************************************/
314		623
315	static struct ev_idle **idles;	624	static struct ev_child *childs [PID_HASHSIZE];
316	static int idlemax, idlecnt;
317		625
318	static struct ev_check **checks;	626	#ifndef WIN32
319	static int checkmax, checkcnt;	627
		628	static struct ev_signal childev;
		629
		630	#ifndef WCONTINUED
		631	# define WCONTINUED 0
		632	#endif
		633
		634	static void
		635	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		636	{
		637	struct ev_child *w;
		638
		639	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		640	if (w->pid == pid || !w->pid)
		641	{
		642	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		643	w->rpid = pid;
		644	w->rstatus = status;
		645	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		646	}
		647	}
		648
		649	static void
		650	childcb (EV_P_ struct ev_signal *sw, int revents)
		651	{
		652	int pid, status;
		653
		654	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		655	{
		656	/* make sure we are called again until all childs have been reaped */
		657	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		658
		659	child_reap (EV_A_ sw, pid, pid, status);
		660	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		661	}
		662	}
		663
		664	#endif
320		665
321	/*****************************************************************************/	666	/*****************************************************************************/
322		667
		668	#if EV_USE_KQUEUE
		669	# include "ev_kqueue.c"
		670	#endif
323	#if HAVE_EPOLL	671	#if EV_USE_EPOLL
324	# include "ev_epoll.c"	672	# include "ev_epoll.c"
325	#endif	673	#endif
		674	#if EV_USE_POLL
		675	# include "ev_poll.c"
		676	#endif
326	#if HAVE_SELECT	677	#if EV_USE_SELECT
327	# include "ev_select.c"	678	# include "ev_select.c"
328	#endif	679	#endif
329		680
330	int ev_init (int flags)	681	int
		682	ev_version_major (void)
331	{	683	{
		684	return EV_VERSION_MAJOR;
		685	}
		686
		687	int
		688	ev_version_minor (void)
		689	{
		690	return EV_VERSION_MINOR;
		691	}
		692
		693	/* return true if we are running with elevated privileges and should ignore env variables */
		694	static int
		695	enable_secure (void)
		696	{
		697	#ifdef WIN32
		698	return 0;
		699	#else
		700	return getuid () != geteuid ()
		701	|| getgid () != getegid ();
		702	#endif
		703	}
		704
		705	int
		706	ev_method (EV_P)
		707	{
		708	return method;
		709	}
		710
		711	static void
		712	loop_init (EV_P_ int methods)
		713	{
		714	if (!method)
		715	{
332	#if HAVE_MONOTONIC	716	#if EV_USE_MONOTONIC
333	{	717	{
334	struct timespec ts;	718	struct timespec ts;
335	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	719	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
336	have_monotonic = 1;	720	have_monotonic = 1;
337	}	721	}
338	#endif	722	#endif
339		723
340	ev_now = ev_time ();	724	rt_now = ev_time ();
341	now = get_clock ();	725	mn_now = get_clock ();
342	diff = ev_now - now;	726	now_floor = mn_now;
		727	rtmn_diff = rt_now - mn_now;
343		728
		729	if (methods == EVMETHOD_AUTO)
		730	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		731	methods = atoi (getenv ("LIBEV_METHODS"));
		732	else
		733	methods = EVMETHOD_ANY;
		734
		735	method = 0;
		736	#if EV_USE_WIN32
		737	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		738	#endif
		739	#if EV_USE_KQUEUE
		740	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		741	#endif
		742	#if EV_USE_EPOLL
		743	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		744	#endif
		745	#if EV_USE_POLL
		746	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		747	#endif
		748	#if EV_USE_SELECT
		749	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		750	#endif
		751
		752	ev_watcher_init (&sigev, sigcb);
		753	ev_set_priority (&sigev, EV_MAXPRI);
		754	}
		755	}
		756
		757	void
		758	loop_destroy (EV_P)
		759	{
		760	int i;
		761
		762	#if EV_USE_WIN32
		763	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		764	#endif
		765	#if EV_USE_KQUEUE
		766	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		767	#endif
		768	#if EV_USE_EPOLL
		769	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		770	#endif
		771	#if EV_USE_POLL
		772	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		773	#endif
		774	#if EV_USE_SELECT
		775	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		776	#endif
		777
		778	for (i = NUMPRI; i--; )
		779	array_free (pending, [i]);
		780
		781	/* have to use the microsoft-never-gets-it-right macro */
		782	array_free_microshit (fdchange);
		783	array_free_microshit (timer);
		784	array_free_microshit (periodic);
		785	array_free_microshit (idle);
		786	array_free_microshit (prepare);
		787	array_free_microshit (check);
		788
		789	method = 0;
		790	}
		791
		792	static void
		793	loop_fork (EV_P)
		794	{
		795	#if EV_USE_EPOLL
		796	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		797	#endif
		798	#if EV_USE_KQUEUE
		799	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		800	#endif
		801
		802	if (ev_is_active (&sigev))
		803	{
		804	/* default loop */
		805
		806	ev_ref (EV_A);
		807	ev_io_stop (EV_A_ &sigev);
		808	close (sigpipe [0]);
		809	close (sigpipe [1]);
		810
		811	while (pipe (sigpipe))
		812	syserr ("(libev) error creating pipe");
		813
		814	siginit (EV_A);
		815	}
		816
		817	postfork = 0;
		818	}
		819
		820	#if EV_MULTIPLICITY
		821	struct ev_loop *
		822	ev_loop_new (int methods)
		823	{
		824	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		825
		826	memset (loop, 0, sizeof (struct ev_loop));
		827
		828	loop_init (EV_A_ methods);
		829
		830	if (ev_method (EV_A))
		831	return loop;
		832
		833	return 0;
		834	}
		835
		836	void
		837	ev_loop_destroy (EV_P)
		838	{
		839	loop_destroy (EV_A);
		840	ev_free (loop);
		841	}
		842
		843	void
		844	ev_loop_fork (EV_P)
		845	{
		846	postfork = 1;
		847	}
		848
		849	#endif
		850
		851	#if EV_MULTIPLICITY
		852	struct ev_loop *
		853	#else
		854	int
		855	#endif
		856	ev_default_loop (int methods)
		857	{
		858	if (sigpipe [0] == sigpipe [1])
344	if (pipe (sigpipe))	859	if (pipe (sigpipe))
345	return 0;	860	return 0;
346		861
347	ev_method = EVMETHOD_NONE;	862	if (!default_loop)
348	#if HAVE_EPOLL	863	{
349	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	864	#if EV_MULTIPLICITY
		865	struct ev_loop *loop = default_loop = &default_loop_struct;
		866	#else
		867	default_loop = 1;
350	#endif	868	#endif
351	#if HAVE_SELECT
352	if (ev_method == EVMETHOD_NONE) select_init (flags);
353	#endif
354		869
		870	loop_init (EV_A_ methods);
		871
		872	if (ev_method (EV_A))
		873	{
		874	siginit (EV_A);
		875
		876	#ifndef WIN32
		877	ev_signal_init (&childev, childcb, SIGCHLD);
		878	ev_set_priority (&childev, EV_MAXPRI);
		879	ev_signal_start (EV_A_ &childev);
		880	ev_unref (EV_A); /* child watcher should not keep loop alive */
		881	#endif
		882	}
		883	else
		884	default_loop = 0;
		885	}
		886
		887	return default_loop;
		888	}
		889
		890	void
		891	ev_default_destroy (void)
		892	{
		893	#if EV_MULTIPLICITY
		894	struct ev_loop *loop = default_loop;
		895	#endif
		896
		897	#ifndef WIN32
		898	ev_ref (EV_A); /* child watcher */
		899	ev_signal_stop (EV_A_ &childev);
		900	#endif
		901
		902	ev_ref (EV_A); /* signal watcher */
		903	ev_io_stop (EV_A_ &sigev);
		904
		905	close (sigpipe [0]); sigpipe [0] = 0;
		906	close (sigpipe [1]); sigpipe [1] = 0;
		907
		908	loop_destroy (EV_A);
		909	}
		910
		911	void
		912	ev_default_fork (void)
		913	{
		914	#if EV_MULTIPLICITY
		915	struct ev_loop *loop = default_loop;
		916	#endif
		917
355	if (ev_method)	918	if (method)
356	{	919	postfork = 1;
357	evw_init (&sigev, sigcb);
358	siginit ();
359	}
360
361	return ev_method;
362	}	920	}
363		921
364	/*****************************************************************************/	922	/*****************************************************************************/
365		923
366	void ev_prefork (void)
367	{
368	/* nop */
369	}
370
371	void ev_postfork_parent (void)
372	{
373	/* nop */
374	}
375
376	void ev_postfork_child (void)
377	{
378	#if HAVE_EPOLL
379	if (ev_method == EVMETHOD_EPOLL)
380	epoll_postfork_child ();
381	#endif
382
383	evio_stop (&sigev);
384	close (sigpipe [0]);
385	close (sigpipe [1]);
386	pipe (sigpipe);
387	siginit ();
388	}
389
390	/*****************************************************************************/
391
392	static void	924	static int
393	fd_reify (void)	925	any_pending (EV_P)
394	{	926	{
395	int i;	927	int pri;
396		928
397	for (i = 0; i < fdchangecnt; ++i)	929	for (pri = NUMPRI; pri--; )
398	{	930	if (pendingcnt [pri])
399	int fd = fdchanges [i];	931	return 1;
400	ANFD *anfd = anfds + fd;
401	struct ev_io *w;
402		932
403	int wev = 0;	933	return 0;
404
405	for (w = anfd->head; w; w = w->next)
406	wev |= w->events;
407
408	if (anfd->wev != wev)
409	{
410	method_modify (fd, anfd->wev, wev);
411	anfd->wev = wev;
412	}
413	}
414
415	fdchangecnt = 0;
416	}	934	}
417		935
418	static void	936	static void
419	call_pending ()	937	call_pending (EV_P)
420	{	938	{
		939	int pri;
		940
		941	for (pri = NUMPRI; pri--; )
421	while (pendingcnt)	942	while (pendingcnt [pri])
422	{	943	{
423	ANPENDING *p = pendings + --pendingcnt;	944	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
424		945
425	if (p->w)	946	if (p->w)
426	{	947	{
427	p->w->pending = 0;	948	p->w->pending = 0;
428	p->w->cb (p->w, p->events);	949	p->w->cb (EV_A_ p->w, p->events);
429	}	950	}
430	}	951	}
431	}	952	}
432		953
433	static void	954	static void
434	timers_reify ()	955	timers_reify (EV_P)
435	{	956	{
436	while (timercnt && timers [0]->at <= now)	957	while (timercnt && ((WT)timers [0])->at <= mn_now)
437	{	958	{
438	struct ev_timer *w = timers [0];	959	struct ev_timer *w = timers [0];
439		960
440	event ((W)w, EV_TIMEOUT);	961	assert (("inactive timer on timer heap detected", ev_is_active (w)));
441		962
442	/* first reschedule or stop timer */	963	/* first reschedule or stop timer */
443	if (w->repeat)	964	if (w->repeat)
444	{	965	{
		966	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
445	w->at = now + w->repeat;	967	((WT)w)->at = mn_now + w->repeat;
446	assert (("timer timeout in the past, negative repeat?", w->at > now));
447	downheap ((WT *)timers, timercnt, 0);	968	downheap ((WT *)timers, timercnt, 0);
448	}	969	}
449	else	970	else
450	evtimer_stop (w); /* nonrepeating: stop timer */	971	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
451	}
452	}
453		972
		973	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		974	}
		975	}
		976
454	static void	977	static void
455	periodics_reify ()	978	periodics_reify (EV_P)
456	{	979	{
457	while (periodiccnt && periodics [0]->at <= ev_now)	980	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
458	{	981	{
459	struct ev_periodic *w = periodics [0];	982	struct ev_periodic *w = periodics [0];
460		983
		984	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		985
461	/* first reschedule or stop timer */	986	/* first reschedule or stop timer */
462	if (w->interval)	987	if (w->reschedule_cb)
463	{	988	{
		989	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001);
		990
		991	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));
		992	downheap ((WT *)periodics, periodiccnt, 0);
		993	}
		994	else if (w->interval)
		995	{
464	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	996	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
465	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	997	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
466	downheap ((WT *)periodics, periodiccnt, 0);	998	downheap ((WT *)periodics, periodiccnt, 0);
467	}	999	}
468	else	1000	else
469	evperiodic_stop (w); /* nonrepeating: stop timer */	1001	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
470		1002
471	event ((W)w, EV_TIMEOUT);	1003	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
472	}	1004	}
473	}	1005	}
474		1006
475	static void	1007	static void
476	periodics_reschedule (ev_tstamp diff)	1008	periodics_reschedule (EV_P)
477	{	1009	{
478	int i;	1010	int i;
479		1011
480	/* adjust periodics after time jump */	1012	/* adjust periodics after time jump */
481	for (i = 0; i < periodiccnt; ++i)	1013	for (i = 0; i < periodiccnt; ++i)
482	{	1014	{
483	struct ev_periodic *w = periodics [i];	1015	struct ev_periodic *w = periodics [i];
484		1016
		1017	if (w->reschedule_cb)
		1018	((WT)w)->at = w->reschedule_cb (w, rt_now);
485	if (w->interval)	1019	else if (w->interval)
		1020	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1021	}
		1022
		1023	/* now rebuild the heap */
		1024	for (i = periodiccnt >> 1; i--; )
		1025	downheap ((WT *)periodics, periodiccnt, i);
		1026	}
		1027
		1028	inline int
		1029	time_update_monotonic (EV_P)
		1030	{
		1031	mn_now = get_clock ();
		1032
		1033	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1034	{
		1035	rt_now = rtmn_diff + mn_now;
		1036	return 0;
		1037	}
		1038	else
		1039	{
		1040	now_floor = mn_now;
		1041	rt_now = ev_time ();
		1042	return 1;
		1043	}
		1044	}
		1045
		1046	static void
		1047	time_update (EV_P)
		1048	{
		1049	int i;
		1050
		1051	#if EV_USE_MONOTONIC
		1052	if (expect_true (have_monotonic))
		1053	{
		1054	if (time_update_monotonic (EV_A))
486	{	1055	{
487	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1056	ev_tstamp odiff = rtmn_diff;
488		1057
489	if (fabs (diff) >= 1e-4)	1058	for (i = 4; --i; ) /* loop a few times, before making important decisions */
490	{	1059	{
491	evperiodic_stop (w);	1060	rtmn_diff = rt_now - mn_now;
492	evperiodic_start (w);
493		1061
494	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1062	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1063	return; /* all is well */
		1064
		1065	rt_now = ev_time ();
		1066	mn_now = get_clock ();
		1067	now_floor = mn_now;
495	}	1068	}
		1069
		1070	periodics_reschedule (EV_A);
		1071	/* no timer adjustment, as the monotonic clock doesn't jump */
		1072	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
496	}	1073	}
497	}	1074	}
498	}	1075	else
499		1076	#endif
500	static void	1077	{
501	time_update ()
502	{
503	int i;
504
505	ev_now = ev_time ();	1078	rt_now = ev_time ();
506		1079
507	if (have_monotonic)	1080	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
508	{
509	ev_tstamp odiff = diff;
510
511	for (i = 4; --i; ) /* loop a few times, before making important decisions */
512	{	1081	{
513	now = get_clock ();
514	diff = ev_now - now;
515
516	if (fabs (odiff - diff) < MIN_TIMEJUMP)
517	return; /* all is well */
518
519	ev_now = ev_time ();
520	}
521
522	periodics_reschedule (diff - odiff);
523	/* no timer adjustment, as the monotonic clock doesn't jump */
524	}
525	else
526	{
527	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
528	{
529	periodics_reschedule (ev_now - now);	1082	periodics_reschedule (EV_A);
530		1083
531	/* adjust timers. this is easy, as the offset is the same for all */	1084	/* adjust timers. this is easy, as the offset is the same for all */
532	for (i = 0; i < timercnt; ++i)	1085	for (i = 0; i < timercnt; ++i)
533	timers [i]->at += diff;	1086	((WT)timers [i])->at += rt_now - mn_now;
534	}	1087	}
535		1088
536	now = ev_now;	1089	mn_now = rt_now;
537	}	1090	}
538	}	1091	}
539		1092
540	int ev_loop_done;	1093	void
		1094	ev_ref (EV_P)
		1095	{
		1096	++activecnt;
		1097	}
541		1098
		1099	void
		1100	ev_unref (EV_P)
		1101	{
		1102	--activecnt;
		1103	}
		1104
		1105	static int loop_done;
		1106
		1107	void
542	void ev_loop (int flags)	1108	ev_loop (EV_P_ int flags)
543	{	1109	{
544	double block;	1110	double block;
545	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1111	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
546
547	if (checkcnt)
548	{
549	queue_events ((W *)checks, checkcnt, EV_CHECK);
550	call_pending ();
551	}
552		1112
553	do	1113	do
554	{	1114	{
		1115	/* queue check watchers (and execute them) */
		1116	if (expect_false (preparecnt))
		1117	{
		1118	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1119	call_pending (EV_A);
		1120	}
		1121
		1122	/* we might have forked, so reify kernel state if necessary */
		1123	if (expect_false (postfork))
		1124	loop_fork (EV_A);
		1125
555	/* update fd-related kernel structures */	1126	/* update fd-related kernel structures */
556	fd_reify ();	1127	fd_reify (EV_A);
557		1128
558	/* calculate blocking time */	1129	/* calculate blocking time */
559		1130
560	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1131	/* we only need this for !monotonic clock or timers, but as we basically
		1132	always have timers, we just calculate it always */
		1133	#if EV_USE_MONOTONIC
		1134	if (expect_true (have_monotonic))
		1135	time_update_monotonic (EV_A);
		1136	else
		1137	#endif
		1138	{
561	ev_now = ev_time ();	1139	rt_now = ev_time ();
		1140	mn_now = rt_now;
		1141	}
562		1142
563	if (flags & EVLOOP_NONBLOCK || idlecnt)	1143	if (flags & EVLOOP_NONBLOCK || idlecnt)
564	block = 0.;	1144	block = 0.;
565	else	1145	else
566	{	1146	{
567	block = MAX_BLOCKTIME;	1147	block = MAX_BLOCKTIME;
568		1148
569	if (timercnt)	1149	if (timercnt)
570	{	1150	{
571	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1151	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
572	if (block > to) block = to;	1152	if (block > to) block = to;
573	}	1153	}
574		1154
575	if (periodiccnt)	1155	if (periodiccnt)
576	{	1156	{
577	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1157	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
578	if (block > to) block = to;	1158	if (block > to) block = to;
579	}	1159	}
580		1160
581	if (block < 0.) block = 0.;	1161	if (block < 0.) block = 0.;
582	}	1162	}
583		1163
584	method_poll (block);	1164	method_poll (EV_A_ block);
585		1165
586	/* update ev_now, do magic */	1166	/* update rt_now, do magic */
587	time_update ();	1167	time_update (EV_A);
588		1168
589	/* queue pending timers and reschedule them */	1169	/* queue pending timers and reschedule them */
		1170	timers_reify (EV_A); /* relative timers called last */
590	periodics_reify (); /* absolute timers first */	1171	periodics_reify (EV_A); /* absolute timers called first */
591	timers_reify (); /* relative timers second */
592		1172
593	/* queue idle watchers unless io or timers are pending */	1173	/* queue idle watchers unless io or timers are pending */
594	if (!pendingcnt)	1174	if (idlecnt && !any_pending (EV_A))
595	queue_events ((W *)idles, idlecnt, EV_IDLE);	1175	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
596		1176
597	/* queue check and possibly idle watchers */	1177	/* queue check watchers, to be executed first */
		1178	if (checkcnt)
598	queue_events ((W *)checks, checkcnt, EV_CHECK);	1179	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
599		1180
600	call_pending ();	1181	call_pending (EV_A);
601	}	1182	}
602	while (!ev_loop_done);	1183	while (activecnt && !loop_done);
603		1184
604	if (ev_loop_done != 2)	1185	if (loop_done != 2)
605	ev_loop_done = 0;	1186	loop_done = 0;
		1187	}
		1188
		1189	void
		1190	ev_unloop (EV_P_ int how)
		1191	{
		1192	loop_done = how;
606	}	1193	}
607		1194
608	/*****************************************************************************/	1195	/*****************************************************************************/
609		1196
610	static void	1197	inline void
611	wlist_add (WL *head, WL elem)	1198	wlist_add (WL *head, WL elem)
612	{	1199	{
613	elem->next = *head;	1200	elem->next = *head;
614	*head = elem;	1201	*head = elem;
615	}	1202	}
616		1203
617	static void	1204	inline void
618	wlist_del (WL *head, WL elem)	1205	wlist_del (WL *head, WL elem)
619	{	1206	{
620	while (*head)	1207	while (*head)
621	{	1208	{
622	if (*head == elem)	1209	if (*head == elem)
…		…
627		1214
628	head = &(*head)->next;	1215	head = &(*head)->next;
629	}	1216	}
630	}	1217	}
631		1218
632	static void	1219	inline void
633	ev_clear (W w)	1220	ev_clear_pending (EV_P_ W w)
634	{	1221	{
635	if (w->pending)	1222	if (w->pending)
636	{	1223	{
637	pendings [w->pending - 1].w = 0;	1224	pendings [ABSPRI (w)][w->pending - 1].w = 0;
638	w->pending = 0;	1225	w->pending = 0;
639	}	1226	}
640	}	1227	}
641		1228
642	static void	1229	inline void
643	ev_start (W w, int active)	1230	ev_start (EV_P_ W w, int active)
644	{	1231	{
		1232	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1233	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1234
645	w->active = active;	1235	w->active = active;
		1236	ev_ref (EV_A);
646	}	1237	}
647		1238
648	static void	1239	inline void
649	ev_stop (W w)	1240	ev_stop (EV_P_ W w)
650	{	1241	{
		1242	ev_unref (EV_A);
651	w->active = 0;	1243	w->active = 0;
652	}	1244	}
653		1245
654	/*****************************************************************************/	1246	/*****************************************************************************/
655		1247
656	void	1248	void
657	evio_start (struct ev_io *w)	1249	ev_io_start (EV_P_ struct ev_io *w)
658	{	1250	{
		1251	int fd = w->fd;
		1252
659	if (ev_is_active (w))	1253	if (ev_is_active (w))
660	return;	1254	return;
661		1255
662	int fd = w->fd;	1256	assert (("ev_io_start called with negative fd", fd >= 0));
663		1257
664	ev_start ((W)w, 1);	1258	ev_start (EV_A_ (W)w, 1);
665	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1259	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
666	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1260	wlist_add ((WL *)&anfds[fd].head, (WL)w);
667		1261
668	++fdchangecnt;	1262	fd_change (EV_A_ fd);
669	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
670	fdchanges [fdchangecnt - 1] = fd;
671	}	1263	}
672		1264
673	void	1265	void
674	evio_stop (struct ev_io *w)	1266	ev_io_stop (EV_P_ struct ev_io *w)
675	{	1267	{
676	ev_clear ((W)w);	1268	ev_clear_pending (EV_A_ (W)w);
677	if (!ev_is_active (w))	1269	if (!ev_is_active (w))
678	return;	1270	return;
679		1271
680	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1272	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
681	ev_stop ((W)w);	1273	ev_stop (EV_A_ (W)w);
682		1274
683	++fdchangecnt;	1275	fd_change (EV_A_ w->fd);
684	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
685	fdchanges [fdchangecnt - 1] = w->fd;
686	}	1276	}
687		1277
688	void	1278	void
689	evtimer_start (struct ev_timer *w)	1279	ev_timer_start (EV_P_ struct ev_timer *w)
690	{	1280	{
691	if (ev_is_active (w))	1281	if (ev_is_active (w))
692	return;	1282	return;
693		1283
694	w->at += now;	1284	((WT)w)->at += mn_now;
695		1285
696	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1286	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
697		1287
698	ev_start ((W)w, ++timercnt);	1288	ev_start (EV_A_ (W)w, ++timercnt);
699	array_needsize (timers, timermax, timercnt, );	1289	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
700	timers [timercnt - 1] = w;	1290	timers [timercnt - 1] = w;
701	upheap ((WT *)timers, timercnt - 1);	1291	upheap ((WT *)timers, timercnt - 1);
702	}
703		1292
		1293	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1294	}
		1295
704	void	1296	void
705	evtimer_stop (struct ev_timer *w)	1297	ev_timer_stop (EV_P_ struct ev_timer *w)
706	{	1298	{
707	ev_clear ((W)w);	1299	ev_clear_pending (EV_A_ (W)w);
708	if (!ev_is_active (w))	1300	if (!ev_is_active (w))
709	return;	1301	return;
710		1302
		1303	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1304
711	if (w->active < timercnt--)	1305	if (((W)w)->active < timercnt--)
712	{	1306	{
713	timers [w->active - 1] = timers [timercnt];	1307	timers [((W)w)->active - 1] = timers [timercnt];
714	downheap ((WT *)timers, timercnt, w->active - 1);	1308	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
715	}	1309	}
716		1310
717	w->at = w->repeat;	1311	((WT)w)->at = w->repeat;
718		1312
719	ev_stop ((W)w);	1313	ev_stop (EV_A_ (W)w);
720	}	1314	}
721		1315
722	void	1316	void
723	evtimer_again (struct ev_timer *w)	1317	ev_timer_again (EV_P_ struct ev_timer *w)
724	{	1318	{
725	if (ev_is_active (w))	1319	if (ev_is_active (w))
726	{	1320	{
727	if (w->repeat)	1321	if (w->repeat)
728	{	1322	{
729	w->at = now + w->repeat;	1323	((WT)w)->at = mn_now + w->repeat;
730	downheap ((WT *)timers, timercnt, w->active - 1);	1324	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
731	}	1325	}
732	else	1326	else
733	evtimer_stop (w);	1327	ev_timer_stop (EV_A_ w);
734	}	1328	}
735	else if (w->repeat)	1329	else if (w->repeat)
736	evtimer_start (w);	1330	ev_timer_start (EV_A_ w);
737	}	1331	}
738		1332
739	void	1333	void
740	evperiodic_start (struct ev_periodic *w)	1334	ev_periodic_start (EV_P_ struct ev_periodic *w)
741	{	1335	{
742	if (ev_is_active (w))	1336	if (ev_is_active (w))
743	return;	1337	return;
744		1338
745	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1339	if (w->reschedule_cb)
746		1340	((WT)w)->at = w->reschedule_cb (w, rt_now);
		1341	else if (w->interval)
		1342	{
		1343	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
747	/* this formula differs from the one in periodic_reify because we do not always round up */	1344	/* this formula differs from the one in periodic_reify because we do not always round up */
748	if (w->interval)
749	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1345	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1346	}
750		1347
751	ev_start ((W)w, ++periodiccnt);	1348	ev_start (EV_A_ (W)w, ++periodiccnt);
752	array_needsize (periodics, periodicmax, periodiccnt, );	1349	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
753	periodics [periodiccnt - 1] = w;	1350	periodics [periodiccnt - 1] = w;
754	upheap ((WT *)periodics, periodiccnt - 1);	1351	upheap ((WT *)periodics, periodiccnt - 1);
755	}
756		1352
		1353	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1354	}
		1355
757	void	1356	void
758	evperiodic_stop (struct ev_periodic *w)	1357	ev_periodic_stop (EV_P_ struct ev_periodic *w)
759	{	1358	{
760	ev_clear ((W)w);	1359	ev_clear_pending (EV_A_ (W)w);
761	if (!ev_is_active (w))	1360	if (!ev_is_active (w))
762	return;	1361	return;
763		1362
		1363	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1364
764	if (w->active < periodiccnt--)	1365	if (((W)w)->active < periodiccnt--)
765	{	1366	{
766	periodics [w->active - 1] = periodics [periodiccnt];	1367	periodics [((W)w)->active - 1] = periodics [periodiccnt];
767	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1368	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
768	}	1369	}
769		1370
770	ev_stop ((W)w);	1371	ev_stop (EV_A_ (W)w);
771	}	1372	}
772		1373
773	void	1374	void
774	evsignal_start (struct ev_signal *w)	1375	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1376	{
		1377	ev_periodic_stop (EV_A_ w);
		1378	ev_periodic_start (EV_A_ w);
		1379	}
		1380
		1381	void
		1382	ev_idle_start (EV_P_ struct ev_idle *w)
775	{	1383	{
776	if (ev_is_active (w))	1384	if (ev_is_active (w))
777	return;	1385	return;
778		1386
		1387	ev_start (EV_A_ (W)w, ++idlecnt);
		1388	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1389	idles [idlecnt - 1] = w;
		1390	}
		1391
		1392	void
		1393	ev_idle_stop (EV_P_ struct ev_idle *w)
		1394	{
		1395	ev_clear_pending (EV_A_ (W)w);
		1396	if (ev_is_active (w))
		1397	return;
		1398
		1399	idles [((W)w)->active - 1] = idles [--idlecnt];
		1400	ev_stop (EV_A_ (W)w);
		1401	}
		1402
		1403	void
		1404	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1405	{
		1406	if (ev_is_active (w))
		1407	return;
		1408
		1409	ev_start (EV_A_ (W)w, ++preparecnt);
		1410	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1411	prepares [preparecnt - 1] = w;
		1412	}
		1413
		1414	void
		1415	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1416	{
		1417	ev_clear_pending (EV_A_ (W)w);
		1418	if (ev_is_active (w))
		1419	return;
		1420
		1421	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1422	ev_stop (EV_A_ (W)w);
		1423	}
		1424
		1425	void
		1426	ev_check_start (EV_P_ struct ev_check *w)
		1427	{
		1428	if (ev_is_active (w))
		1429	return;
		1430
		1431	ev_start (EV_A_ (W)w, ++checkcnt);
		1432	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1433	checks [checkcnt - 1] = w;
		1434	}
		1435
		1436	void
		1437	ev_check_stop (EV_P_ struct ev_check *w)
		1438	{
		1439	ev_clear_pending (EV_A_ (W)w);
		1440	if (ev_is_active (w))
		1441	return;
		1442
		1443	checks [((W)w)->active - 1] = checks [--checkcnt];
		1444	ev_stop (EV_A_ (W)w);
		1445	}
		1446
		1447	#ifndef SA_RESTART
		1448	# define SA_RESTART 0
		1449	#endif
		1450
		1451	void
		1452	ev_signal_start (EV_P_ struct ev_signal *w)
		1453	{
		1454	#if EV_MULTIPLICITY
		1455	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1456	#endif
		1457	if (ev_is_active (w))
		1458	return;
		1459
		1460	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1461
779	ev_start ((W)w, 1);	1462	ev_start (EV_A_ (W)w, 1);
780	array_needsize (signals, signalmax, w->signum, signals_init);	1463	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
781	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1464	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
782		1465
783	if (!w->next)	1466	if (!((WL)w)->next)
784	{	1467	{
		1468	#if WIN32
		1469	signal (w->signum, sighandler);
		1470	#else
785	struct sigaction sa;	1471	struct sigaction sa;
786	sa.sa_handler = sighandler;	1472	sa.sa_handler = sighandler;
787	sigfillset (&sa.sa_mask);	1473	sigfillset (&sa.sa_mask);
788	sa.sa_flags = 0;	1474	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
789	sigaction (w->signum, &sa, 0);	1475	sigaction (w->signum, &sa, 0);
		1476	#endif
790	}	1477	}
791	}	1478	}
792		1479
793	void	1480	void
794	evsignal_stop (struct ev_signal *w)	1481	ev_signal_stop (EV_P_ struct ev_signal *w)
795	{	1482	{
796	ev_clear ((W)w);	1483	ev_clear_pending (EV_A_ (W)w);
797	if (!ev_is_active (w))	1484	if (!ev_is_active (w))
798	return;	1485	return;
799		1486
800	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1487	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
801	ev_stop ((W)w);	1488	ev_stop (EV_A_ (W)w);
802		1489
803	if (!signals [w->signum - 1].head)	1490	if (!signals [w->signum - 1].head)
804	signal (w->signum, SIG_DFL);	1491	signal (w->signum, SIG_DFL);
805	}	1492	}
806		1493
807	void evidle_start (struct ev_idle *w)	1494	void
		1495	ev_child_start (EV_P_ struct ev_child *w)
808	{	1496	{
		1497	#if EV_MULTIPLICITY
		1498	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1499	#endif
809	if (ev_is_active (w))	1500	if (ev_is_active (w))
810	return;	1501	return;
811		1502
812	ev_start ((W)w, ++idlecnt);	1503	ev_start (EV_A_ (W)w, 1);
813	array_needsize (idles, idlemax, idlecnt, );	1504	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
814	idles [idlecnt - 1] = w;
815	}	1505	}
816		1506
817	void evidle_stop (struct ev_idle *w)	1507	void
		1508	ev_child_stop (EV_P_ struct ev_child *w)
818	{	1509	{
819	ev_clear ((W)w);	1510	ev_clear_pending (EV_A_ (W)w);
820	if (ev_is_active (w))	1511	if (ev_is_active (w))
821	return;	1512	return;
822		1513
823	idles [w->active - 1] = idles [--idlecnt];	1514	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
824	ev_stop ((W)w);	1515	ev_stop (EV_A_ (W)w);
825	}
826
827	void evcheck_start (struct ev_check *w)
828	{
829	if (ev_is_active (w))
830	return;
831
832	ev_start ((W)w, ++checkcnt);
833	array_needsize (checks, checkmax, checkcnt, );
834	checks [checkcnt - 1] = w;
835	}
836
837	void evcheck_stop (struct ev_check *w)
838	{
839	ev_clear ((W)w);
840	if (ev_is_active (w))
841	return;
842
843	checks [w->active - 1] = checks [--checkcnt];
844	ev_stop ((W)w);
845	}	1516	}
846		1517
847	/*****************************************************************************/	1518	/*****************************************************************************/
848		1519
849	struct ev_once	1520	struct ev_once
…		…
853	void (*cb)(int revents, void *arg);	1524	void (*cb)(int revents, void *arg);
854	void *arg;	1525	void *arg;
855	};	1526	};
856		1527
857	static void	1528	static void
858	once_cb (struct ev_once *once, int revents)	1529	once_cb (EV_P_ struct ev_once *once, int revents)
859	{	1530	{
860	void (*cb)(int revents, void *arg) = once->cb;	1531	void (*cb)(int revents, void *arg) = once->cb;
861	void *arg = once->arg;	1532	void *arg = once->arg;
862		1533
863	evio_stop (&once->io);	1534	ev_io_stop (EV_A_ &once->io);
864	evtimer_stop (&once->to);	1535	ev_timer_stop (EV_A_ &once->to);
865	free (once);	1536	ev_free (once);
866		1537
867	cb (revents, arg);	1538	cb (revents, arg);
868	}	1539	}
869		1540
870	static void	1541	static void
871	once_cb_io (struct ev_io *w, int revents)	1542	once_cb_io (EV_P_ struct ev_io *w, int revents)
872	{	1543	{
873	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1544	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
874	}	1545	}
875		1546
876	static void	1547	static void
877	once_cb_to (struct ev_timer *w, int revents)	1548	once_cb_to (EV_P_ struct ev_timer *w, int revents)
878	{	1549	{
879	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1550	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
880	}	1551	}
881		1552
882	void	1553	void
883	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1554	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
884	{	1555	{
885	struct ev_once *once = malloc (sizeof (struct ev_once));	1556	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
886		1557
887	if (!once)	1558	if (!once)
888	cb (EV_ERROR, arg);	1559	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
889	else	1560	else
890	{	1561	{
891	once->cb = cb;	1562	once->cb = cb;
892	once->arg = arg;	1563	once->arg = arg;
893		1564
894	evw_init (&once->io, once_cb_io);	1565	ev_watcher_init (&once->io, once_cb_io);
895
896	if (fd >= 0)	1566	if (fd >= 0)
897	{	1567	{
898	evio_set (&once->io, fd, events);	1568	ev_io_set (&once->io, fd, events);
899	evio_start (&once->io);	1569	ev_io_start (EV_A_ &once->io);
900	}	1570	}
901		1571
902	evw_init (&once->to, once_cb_to);	1572	ev_watcher_init (&once->to, once_cb_to);
903
904	if (timeout >= 0.)	1573	if (timeout >= 0.)
905	{	1574	{
906	evtimer_set (&once->to, timeout, 0.);	1575	ev_timer_set (&once->to, timeout, 0.);
907	evtimer_start (&once->to);	1576	ev_timer_start (EV_A_ &once->to);
908	}	1577	}
909	}	1578	}
910	}	1579	}
911		1580
912	/*****************************************************************************/
913
914	#if 0
915
916	struct ev_io wio;
917
918	static void
919	sin_cb (struct ev_io *w, int revents)
920	{
921	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
922	}
923
924	static void
925	ocb (struct ev_timer *w, int revents)
926	{
927	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
928	evtimer_stop (w);
929	evtimer_start (w);
930	}
931
932	static void
933	scb (struct ev_signal *w, int revents)
934	{
935	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
936	evio_stop (&wio);
937	evio_start (&wio);
938	}
939
940	static void
941	gcb (struct ev_signal *w, int revents)
942	{
943	fprintf (stderr, "generic %x\n", revents);
944
945	}
946
947	int main (void)
948	{
949	ev_init (0);
950
951	evio_init (&wio, sin_cb, 0, EV_READ);
952	evio_start (&wio);
953
954	struct ev_timer t[10000];
955
956	#if 0
957	int i;
958	for (i = 0; i < 10000; ++i)
959	{
960	struct ev_timer *w = t + i;
961	evw_init (w, ocb, i);
962	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
963	evtimer_start (w);
964	if (drand48 () < 0.5)
965	evtimer_stop (w);
966	}
967	#endif
968
969	struct ev_timer t1;
970	evtimer_init (&t1, ocb, 5, 10);
971	evtimer_start (&t1);
972
973	struct ev_signal sig;
974	evsignal_init (&sig, scb, SIGQUIT);
975	evsignal_start (&sig);
976
977	struct ev_check cw;
978	evcheck_init (&cw, gcb);
979	evcheck_start (&cw);
980
981	struct ev_idle iw;
982	evidle_init (&iw, gcb);
983	evidle_start (&iw);
984
985	ev_loop (0);
986
987	return 0;
988	}
989
990	#endif
991
992
993
994

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