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Comparing libev/ev.c (file contents):
Revision 1.19 by root, Wed Oct 31 17:55:55 2007 UTC vs.
Revision 1.83 by root, Fri Nov 9 21:48:23 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
		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
44	#ifndef HAVE_MONOTONIC	78	#ifndef EV_USE_MONOTONIC
45	# ifdef CLOCK_MONOTONIC
46	# 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
47	# endif	105	# endif
48	#endif	106	#endif
49		107
50	#ifndef HAVE_SELECT
51	# define HAVE_SELECT 1
52	#endif
53
54	#ifndef HAVE_EPOLL
55	# define HAVE_EPOLL 0
56	#endif
57
58	#ifndef HAVE_REALTIME	108	#ifndef EV_USE_REALTIME
59	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	109	# define EV_USE_REALTIME 1
60	#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	/**/
61		125
62	#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) */
63	#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 */
64		130
		131	#ifdef EV_H
		132	# include EV_H
		133	#else
65	#include "ev.h"	134	# include "ev.h"
		135	#endif
		136
		137	#if __GNUC__ >= 3
		138	# define expect(expr,value) __builtin_expect ((expr),(value))
		139	# define inline inline
		140	#else
		141	# define expect(expr,value) (expr)
		142	# define inline static
		143	#endif
		144
		145	#define expect_false(expr) expect ((expr) != 0, 0)
		146	#define expect_true(expr) expect ((expr) != 0, 1)
		147
		148	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		149	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
66		150
67	typedef struct ev_watcher *W;	151	typedef struct ev_watcher *W;
68	typedef struct ev_watcher_list *WL;	152	typedef struct ev_watcher_list *WL;
69	typedef struct ev_watcher_time *WT;	153	typedef struct ev_watcher_time *WT;
70		154
71	static ev_tstamp now, diff; /* monotonic clock */	155	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
72	ev_tstamp ev_now;
73	int ev_method;
74		156
75	static int have_monotonic; /* runtime */	157	#include "ev_win32.c"
76
77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
78	static void (*method_modify)(int fd, int oev, int nev);
79	static void (*method_poll)(ev_tstamp timeout);
80		158
81	/*****************************************************************************/	159	/*****************************************************************************/
82		160
83	ev_tstamp	161	static void (*syserr_cb)(const char *msg);
		162
		163	void ev_set_syserr_cb (void (*cb)(const char *msg))
		164	{
		165	syserr_cb = cb;
		166	}
		167
		168	static void
		169	syserr (const char *msg)
		170	{
		171	if (!msg)
		172	msg = "(libev) system error";
		173
		174	if (syserr_cb)
		175	syserr_cb (msg);
		176	else
		177	{
		178	perror (msg);
		179	abort ();
		180	}
		181	}
		182
		183	static void *(*alloc)(void *ptr, long size);
		184
		185	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		186	{
		187	alloc = cb;
		188	}
		189
		190	static void *
		191	ev_realloc (void *ptr, long size)
		192	{
		193	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		194
		195	if (!ptr && size)
		196	{
		197	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		198	abort ();
		199	}
		200
		201	return ptr;
		202	}
		203
		204	#define ev_malloc(size) ev_realloc (0, (size))
		205	#define ev_free(ptr) ev_realloc ((ptr), 0)
		206
		207	/*****************************************************************************/
		208
		209	typedef struct
		210	{
		211	WL head;
		212	unsigned char events;
		213	unsigned char reify;
		214	} ANFD;
		215
		216	typedef struct
		217	{
		218	W w;
		219	int events;
		220	} ANPENDING;
		221
		222	#if EV_MULTIPLICITY
		223
		224	struct ev_loop
		225	{
		226	#define VAR(name,decl) decl;
		227	#include "ev_vars.h"
		228	#undef VAR
		229	};
		230	#include "ev_wrap.h"
		231
		232	struct ev_loop default_loop_struct;
		233	static struct ev_loop *default_loop;
		234
		235	#else
		236
		237	#define VAR(name,decl) static decl;
		238	#include "ev_vars.h"
		239	#undef VAR
		240
		241	static int default_loop;
		242
		243	#endif
		244
		245	/*****************************************************************************/
		246
		247	inline ev_tstamp
84	ev_time (void)	248	ev_time (void)
85	{	249	{
86	#if HAVE_REALTIME	250	#if EV_USE_REALTIME
87	struct timespec ts;	251	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	252	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	253	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	254	#else
91	struct timeval tv;	255	struct timeval tv;
92	gettimeofday (&tv, 0);	256	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	257	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	258	#endif
95	}	259	}
96		260
97	static ev_tstamp	261	inline ev_tstamp
98	get_clock (void)	262	get_clock (void)
99	{	263	{
100	#if HAVE_MONOTONIC	264	#if EV_USE_MONOTONIC
101	if (have_monotonic)	265	if (expect_true (have_monotonic))
102	{	266	{
103	struct timespec ts;	267	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	268	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	269	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	270	}
107	#endif	271	#endif
108		272
109	return ev_time ();	273	return ev_time ();
110	}	274	}
111		275
		276	ev_tstamp
		277	ev_now (EV_P)
		278	{
		279	return rt_now;
		280	}
		281
		282	#define array_roundsize(type,n) ((n) | 4 & ~3)
		283
112	#define array_needsize(base,cur,cnt,init) \	284	#define array_needsize(type,base,cur,cnt,init) \
113	if ((cnt) > cur) \	285	if (expect_false ((cnt) > cur)) \
114	{ \	286	{ \
115	int newcnt = cur ? cur << 1 : 16; \	287	int newcnt = cur; \
		288	do \
		289	{ \
		290	newcnt = array_roundsize (type, newcnt << 1); \
		291	} \
		292	while ((cnt) > newcnt); \
		293	\
116	base = realloc (base, sizeof (*base) * (newcnt)); \	294	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
117	init (base + cur, newcnt - cur); \	295	init (base + cur, newcnt - cur); \
118	cur = newcnt; \	296	cur = newcnt; \
119	}	297	}
		298
		299	#define array_slim(type,stem) \
		300	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		301	{ \
		302	stem ## max = array_roundsize (stem ## cnt >> 1); \
		303	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		304	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		305	}
		306
		307	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		308	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		309	#define array_free_microshit(stem) \
		310	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		311
		312	#define array_free(stem, idx) \
		313	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
120		314
121	/*****************************************************************************/	315	/*****************************************************************************/
122		316
123	typedef struct
124	{
125	struct ev_io *head;
126	unsigned char wev, rev; /* want, received event set */
127	} ANFD;
128
129	static ANFD *anfds;
130	static int anfdmax;
131
132	static int *fdchanges;
133	static int fdchangemax, fdchangecnt;
134
135	static void	317	static void
136	anfds_init (ANFD *base, int count)	318	anfds_init (ANFD *base, int count)
137	{	319	{
138	while (count--)	320	while (count--)
139	{	321	{
140	base->head = 0;	322	base->head = 0;
141	base->wev = base->rev = EV_NONE;	323	base->events = EV_NONE;
		324	base->reify = 0;
		325
142	++base;	326	++base;
143	}	327	}
144	}	328	}
145		329
146	typedef struct	330	void
		331	ev_feed_event (EV_P_ void *w, int revents)
147	{	332	{
148	W w;	333	W w_ = (W)w;
149	int events;
150	} ANPENDING;
151		334
152	static ANPENDING *pendings;	335	if (w_->pending)
153	static int pendingmax, pendingcnt;
154
155	static void
156	event (W w, int events)
157	{
158	if (w->active)
159	{	336	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;	337	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		338	return;
164	}	339	}
165	}
166		340
		341	w_->pending = ++pendingcnt [ABSPRI (w_)];
		342	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
		343	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		344	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		345	}
		346
167	static void	347	static void
		348	queue_events (EV_P_ W *events, int eventcnt, int type)
		349	{
		350	int i;
		351
		352	for (i = 0; i < eventcnt; ++i)
		353	ev_feed_event (EV_A_ events [i], type);
		354	}
		355
		356	inline void
168	fd_event (int fd, int events)	357	fd_event (EV_P_ int fd, int revents)
169	{	358	{
170	ANFD *anfd = anfds + fd;	359	ANFD *anfd = anfds + fd;
171	struct ev_io *w;	360	struct ev_io *w;
172		361
173	for (w = anfd->head; w; w = w->next)	362	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
174	{	363	{
175	int ev = w->events & events;	364	int ev = w->events & revents;
176		365
177	if (ev)	366	if (ev)
178	event ((W)w, ev);	367	ev_feed_event (EV_A_ (W)w, ev);
179	}	368	}
180	}	369	}
181		370
		371	void
		372	ev_feed_fd_event (EV_P_ int fd, int revents)
		373	{
		374	fd_event (EV_A_ fd, revents);
		375	}
		376
		377	/*****************************************************************************/
		378
182	static void	379	static void
183	queue_events (W *events, int eventcnt, int type)	380	fd_reify (EV_P)
184	{	381	{
185	int i;	382	int i;
186		383
187	for (i = 0; i < eventcnt; ++i)	384	for (i = 0; i < fdchangecnt; ++i)
188	event (events [i], type);	385	{
		386	int fd = fdchanges [i];
		387	ANFD *anfd = anfds + fd;
		388	struct ev_io *w;
		389
		390	int events = 0;
		391
		392	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		393	events |= w->events;
		394
		395	anfd->reify = 0;
		396
		397	method_modify (EV_A_ fd, anfd->events, events);
		398	anfd->events = events;
		399	}
		400
		401	fdchangecnt = 0;
		402	}
		403
		404	static void
		405	fd_change (EV_P_ int fd)
		406	{
		407	if (anfds [fd].reify)
		408	return;
		409
		410	anfds [fd].reify = 1;
		411
		412	++fdchangecnt;
		413	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		414	fdchanges [fdchangecnt - 1] = fd;
		415	}
		416
		417	static void
		418	fd_kill (EV_P_ int fd)
		419	{
		420	struct ev_io *w;
		421
		422	while ((w = (struct ev_io *)anfds [fd].head))
		423	{
		424	ev_io_stop (EV_A_ w);
		425	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		426	}
		427	}
		428
		429	static int
		430	fd_valid (int fd)
		431	{
		432	#ifdef WIN32
		433	return !!win32_get_osfhandle (fd);
		434	#else
		435	return fcntl (fd, F_GETFD) != -1;
		436	#endif
189	}	437	}
190		438
191	/* called on EBADF to verify fds */	439	/* called on EBADF to verify fds */
192	static void	440	static void
193	fd_recheck ()	441	fd_ebadf (EV_P)
194	{	442	{
195	int fd;	443	int fd;
196		444
197	for (fd = 0; fd < anfdmax; ++fd)	445	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)	446	if (anfds [fd].events)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	447	if (!fd_valid (fd) == -1 && errno == EBADF)
200	while (anfds [fd].head)	448	fd_kill (EV_A_ fd);
201	evio_stop (anfds [fd].head);	449	}
		450
		451	/* called on ENOMEM in select/poll to kill some fds and retry */
		452	static void
		453	fd_enomem (EV_P)
		454	{
		455	int fd;
		456
		457	for (fd = anfdmax; fd--; )
		458	if (anfds [fd].events)
		459	{
		460	fd_kill (EV_A_ fd);
		461	return;
		462	}
		463	}
		464
		465	/* usually called after fork if method needs to re-arm all fds from scratch */
		466	static void
		467	fd_rearm_all (EV_P)
		468	{
		469	int fd;
		470
		471	/* this should be highly optimised to not do anything but set a flag */
		472	for (fd = 0; fd < anfdmax; ++fd)
		473	if (anfds [fd].events)
		474	{
		475	anfds [fd].events = 0;
		476	fd_change (EV_A_ fd);
		477	}
202	}	478	}
203		479
204	/*****************************************************************************/	480	/*****************************************************************************/
205		481
206	static struct ev_timer **timers;
207	static int timermax, timercnt;
208
209	static struct ev_periodic **periodics;
210	static int periodicmax, periodiccnt;
211
212	static void	482	static void
213	upheap (WT *timers, int k)	483	upheap (WT *heap, int k)
214	{	484	{
215	WT w = timers [k];	485	WT w = heap [k];
216		486
217	while (k && timers [k >> 1]->at > w->at)	487	while (k && heap [k >> 1]->at > w->at)
218	{	488	{
219	timers [k] = timers [k >> 1];	489	heap [k] = heap [k >> 1];
220	timers [k]->active = k + 1;	490	((W)heap [k])->active = k + 1;
221	k >>= 1;	491	k >>= 1;
222	}	492	}
223		493
224	timers [k] = w;	494	heap [k] = w;
225	timers [k]->active = k + 1;	495	((W)heap [k])->active = k + 1;
226		496
227	}	497	}
228		498
229	static void	499	static void
230	downheap (WT *timers, int N, int k)	500	downheap (WT *heap, int N, int k)
231	{	501	{
232	WT w = timers [k];	502	WT w = heap [k];
233		503
234	while (k < (N >> 1))	504	while (k < (N >> 1))
235	{	505	{
236	int j = k << 1;	506	int j = k << 1;
237		507
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	508	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
239	++j;	509	++j;
240		510
241	if (w->at <= timers [j]->at)	511	if (w->at <= heap [j]->at)
242	break;	512	break;
243		513
244	timers [k] = timers [j];	514	heap [k] = heap [j];
245	timers [k]->active = k + 1;	515	((W)heap [k])->active = k + 1;
246	k = j;	516	k = j;
247	}	517	}
248		518
249	timers [k] = w;	519	heap [k] = w;
250	timers [k]->active = k + 1;	520	((W)heap [k])->active = k + 1;
251	}	521	}
252		522
253	/*****************************************************************************/	523	/*****************************************************************************/
254		524
255	typedef struct	525	typedef struct
256	{	526	{
257	struct ev_signal *head;	527	WL head;
258	sig_atomic_t gotsig;	528	sig_atomic_t volatile gotsig;
259	} ANSIG;	529	} ANSIG;
260		530
261	static ANSIG *signals;	531	static ANSIG *signals;
262	static int signalmax;	532	static int signalmax;
263		533
264	static int sigpipe [2];	534	static int sigpipe [2];
265	static sig_atomic_t gotsig;	535	static sig_atomic_t volatile gotsig;
266	static struct ev_io sigev;	536	static struct ev_io sigev;
267		537
268	static void	538	static void
269	signals_init (ANSIG *base, int count)	539	signals_init (ANSIG *base, int count)
270	{	540	{
271	while (count--)	541	while (count--)
272	{	542	{
273	base->head = 0;	543	base->head = 0;
274	base->gotsig = 0;	544	base->gotsig = 0;
		545
275	++base;	546	++base;
276	}	547	}
277	}	548	}
278		549
279	static void	550	static void
280	sighandler (int signum)	551	sighandler (int signum)
281	{	552	{
		553	#if WIN32
		554	signal (signum, sighandler);
		555	#endif
		556
282	signals [signum - 1].gotsig = 1;	557	signals [signum - 1].gotsig = 1;
283		558
284	if (!gotsig)	559	if (!gotsig)
285	{	560	{
		561	int old_errno = errno;
286	gotsig = 1;	562	gotsig = 1;
		563	#ifdef WIN32
		564	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		565	#else
287	write (sigpipe [1], &gotsig, 1);	566	write (sigpipe [1], &signum, 1);
		567	#endif
		568	errno = old_errno;
288	}	569	}
289	}	570	}
290		571
		572	void
		573	ev_feed_signal_event (EV_P_ int signum)
		574	{
		575	WL w;
		576
		577	#if EV_MULTIPLICITY
		578	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		579	#endif
		580
		581	--signum;
		582
		583	if (signum < 0 || signum >= signalmax)
		584	return;
		585
		586	signals [signum].gotsig = 0;
		587
		588	for (w = signals [signum].head; w; w = w->next)
		589	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		590	}
		591
291	static void	592	static void
292	sigcb (struct ev_io *iow, int revents)	593	sigcb (EV_P_ struct ev_io *iow, int revents)
293	{	594	{
294	struct ev_signal *w;
295	int sig;	595	int signum;
296		596
		597	#ifdef WIN32
		598	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		599	#else
		600	read (sigpipe [0], &revents, 1);
		601	#endif
297	gotsig = 0;	602	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299		603
300	for (sig = signalmax; sig--; )	604	for (signum = signalmax; signum--; )
301	if (signals [sig].gotsig)	605	if (signals [signum].gotsig)
302	{	606	ev_feed_signal_event (EV_A_ signum + 1);
303	signals [sig].gotsig = 0;
304
305	for (w = signals [sig].head; w; w = w->next)
306	event ((W)w, EV_SIGNAL);
307	}
308	}	607	}
309		608
310	static void	609	static void
311	siginit (void)	610	siginit (EV_P)
312	{	611	{
		612	#ifndef WIN32
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	613	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	614	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315		615
316	/* rather than sort out wether we really need nb, set it */	616	/* rather than sort out wether we really need nb, set it */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	617	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	618	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		619	#endif
319		620
320	evio_set (&sigev, sigpipe [0], EV_READ);	621	ev_io_set (&sigev, sigpipe [0], EV_READ);
321	evio_start (&sigev);	622	ev_io_start (EV_A_ &sigev);
		623	ev_unref (EV_A); /* child watcher should not keep loop alive */
322	}	624	}
323		625
324	/*****************************************************************************/	626	/*****************************************************************************/
325		627
326	static struct ev_idle **idles;	628	static struct ev_child *childs [PID_HASHSIZE];
327	static int idlemax, idlecnt;
328		629
329	static struct ev_check **checks;	630	#ifndef WIN32
330	static int checkmax, checkcnt;	631
		632	static struct ev_signal childev;
		633
		634	#ifndef WCONTINUED
		635	# define WCONTINUED 0
		636	#endif
		637
		638	static void
		639	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		640	{
		641	struct ev_child *w;
		642
		643	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		644	if (w->pid == pid || !w->pid)
		645	{
		646	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		647	w->rpid = pid;
		648	w->rstatus = status;
		649	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		650	}
		651	}
		652
		653	static void
		654	childcb (EV_P_ struct ev_signal *sw, int revents)
		655	{
		656	int pid, status;
		657
		658	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		659	{
		660	/* make sure we are called again until all childs have been reaped */
		661	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		662
		663	child_reap (EV_A_ sw, pid, pid, status);
		664	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		665	}
		666	}
		667
		668	#endif
331		669
332	/*****************************************************************************/	670	/*****************************************************************************/
333		671
		672	#if EV_USE_KQUEUE
		673	# include "ev_kqueue.c"
		674	#endif
334	#if HAVE_EPOLL	675	#if EV_USE_EPOLL
335	# include "ev_epoll.c"	676	# include "ev_epoll.c"
336	#endif	677	#endif
		678	#if EV_USE_POLL
		679	# include "ev_poll.c"
		680	#endif
337	#if HAVE_SELECT	681	#if EV_USE_SELECT
338	# include "ev_select.c"	682	# include "ev_select.c"
339	#endif	683	#endif
340		684
341	int ev_init (int flags)	685	int
		686	ev_version_major (void)
342	{	687	{
		688	return EV_VERSION_MAJOR;
		689	}
		690
		691	int
		692	ev_version_minor (void)
		693	{
		694	return EV_VERSION_MINOR;
		695	}
		696
		697	/* return true if we are running with elevated privileges and should ignore env variables */
		698	static int
		699	enable_secure (void)
		700	{
		701	#ifdef WIN32
		702	return 0;
		703	#else
		704	return getuid () != geteuid ()
		705	|| getgid () != getegid ();
		706	#endif
		707	}
		708
		709	int
		710	ev_method (EV_P)
		711	{
		712	return method;
		713	}
		714
		715	static void
		716	loop_init (EV_P_ int methods)
		717	{
		718	if (!method)
		719	{
343	#if HAVE_MONOTONIC	720	#if EV_USE_MONOTONIC
344	{	721	{
345	struct timespec ts;	722	struct timespec ts;
346	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	723	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
347	have_monotonic = 1;	724	have_monotonic = 1;
348	}	725	}
349	#endif	726	#endif
350		727
351	ev_now = ev_time ();	728	rt_now = ev_time ();
352	now = get_clock ();	729	mn_now = get_clock ();
353	diff = ev_now - now;	730	now_floor = mn_now;
		731	rtmn_diff = rt_now - mn_now;
354		732
355	if (pipe (sigpipe))	733	if (methods == EVMETHOD_AUTO)
356	return 0;	734	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		735	methods = atoi (getenv ("LIBEV_METHODS"));
		736	else
		737	methods = EVMETHOD_ANY;
357		738
358	ev_method = EVMETHOD_NONE;	739	method = 0;
		740	#if EV_USE_WIN32
		741	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		742	#endif
		743	#if EV_USE_KQUEUE
		744	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		745	#endif
359	#if HAVE_EPOLL	746	#if EV_USE_EPOLL
360	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	747	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
361	#endif	748	#endif
		749	#if EV_USE_POLL
		750	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		751	#endif
362	#if HAVE_SELECT	752	#if EV_USE_SELECT
363	if (ev_method == EVMETHOD_NONE) select_init (flags);	753	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
364	#endif	754	#endif
365		755
366	if (ev_method)
367	{
368	evw_init (&sigev, sigcb);	756	ev_init (&sigev, sigcb);
		757	ev_set_priority (&sigev, EV_MAXPRI);
		758	}
		759	}
		760
		761	void
		762	loop_destroy (EV_P)
		763	{
		764	int i;
		765
		766	#if EV_USE_WIN32
		767	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		768	#endif
		769	#if EV_USE_KQUEUE
		770	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		771	#endif
		772	#if EV_USE_EPOLL
		773	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		774	#endif
		775	#if EV_USE_POLL
		776	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		777	#endif
		778	#if EV_USE_SELECT
		779	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		780	#endif
		781
		782	for (i = NUMPRI; i--; )
		783	array_free (pending, [i]);
		784
		785	/* have to use the microsoft-never-gets-it-right macro */
		786	array_free_microshit (fdchange);
		787	array_free_microshit (timer);
		788	array_free_microshit (periodic);
		789	array_free_microshit (idle);
		790	array_free_microshit (prepare);
		791	array_free_microshit (check);
		792
		793	method = 0;
		794	}
		795
		796	static void
		797	loop_fork (EV_P)
		798	{
		799	#if EV_USE_EPOLL
		800	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		801	#endif
		802	#if EV_USE_KQUEUE
		803	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		804	#endif
		805
		806	if (ev_is_active (&sigev))
		807	{
		808	/* default loop */
		809
		810	ev_ref (EV_A);
		811	ev_io_stop (EV_A_ &sigev);
		812	close (sigpipe [0]);
		813	close (sigpipe [1]);
		814
		815	while (pipe (sigpipe))
		816	syserr ("(libev) error creating pipe");
		817
369	siginit ();	818	siginit (EV_A);
		819	}
		820
		821	postfork = 0;
		822	}
		823
		824	#if EV_MULTIPLICITY
		825	struct ev_loop *
		826	ev_loop_new (int methods)
		827	{
		828	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		829
		830	memset (loop, 0, sizeof (struct ev_loop));
		831
		832	loop_init (EV_A_ methods);
		833
		834	if (ev_method (EV_A))
		835	return loop;
		836
		837	return 0;
		838	}
		839
		840	void
		841	ev_loop_destroy (EV_P)
		842	{
		843	loop_destroy (EV_A);
		844	ev_free (loop);
		845	}
		846
		847	void
		848	ev_loop_fork (EV_P)
		849	{
		850	postfork = 1;
		851	}
		852
		853	#endif
		854
		855	#if EV_MULTIPLICITY
		856	struct ev_loop *
		857	#else
		858	int
		859	#endif
		860	ev_default_loop (int methods)
		861	{
		862	if (sigpipe [0] == sigpipe [1])
		863	if (pipe (sigpipe))
		864	return 0;
		865
		866	if (!default_loop)
370	}	867	{
		868	#if EV_MULTIPLICITY
		869	struct ev_loop *loop = default_loop = &default_loop_struct;
		870	#else
		871	default_loop = 1;
		872	#endif
371		873
372	return ev_method;	874	loop_init (EV_A_ methods);
		875
		876	if (ev_method (EV_A))
		877	{
		878	siginit (EV_A);
		879
		880	#ifndef WIN32
		881	ev_signal_init (&childev, childcb, SIGCHLD);
		882	ev_set_priority (&childev, EV_MAXPRI);
		883	ev_signal_start (EV_A_ &childev);
		884	ev_unref (EV_A); /* child watcher should not keep loop alive */
		885	#endif
		886	}
		887	else
		888	default_loop = 0;
		889	}
		890
		891	return default_loop;
		892	}
		893
		894	void
		895	ev_default_destroy (void)
		896	{
		897	#if EV_MULTIPLICITY
		898	struct ev_loop *loop = default_loop;
		899	#endif
		900
		901	#ifndef WIN32
		902	ev_ref (EV_A); /* child watcher */
		903	ev_signal_stop (EV_A_ &childev);
		904	#endif
		905
		906	ev_ref (EV_A); /* signal watcher */
		907	ev_io_stop (EV_A_ &sigev);
		908
		909	close (sigpipe [0]); sigpipe [0] = 0;
		910	close (sigpipe [1]); sigpipe [1] = 0;
		911
		912	loop_destroy (EV_A);
		913	}
		914
		915	void
		916	ev_default_fork (void)
		917	{
		918	#if EV_MULTIPLICITY
		919	struct ev_loop *loop = default_loop;
		920	#endif
		921
		922	if (method)
		923	postfork = 1;
373	}	924	}
374		925
375	/*****************************************************************************/	926	/*****************************************************************************/
376		927
377	void ev_prefork (void)
378	{
379	/* nop */
380	}
381
382	void ev_postfork_parent (void)
383	{
384	/* nop */
385	}
386
387	void ev_postfork_child (void)
388	{
389	#if HAVE_EPOLL
390	if (ev_method == EVMETHOD_EPOLL)
391	epoll_postfork_child ();
392	#endif
393
394	evio_stop (&sigev);
395	close (sigpipe [0]);
396	close (sigpipe [1]);
397	pipe (sigpipe);
398	siginit ();
399	}
400
401	/*****************************************************************************/
402
403	static void	928	static int
404	fd_reify (void)	929	any_pending (EV_P)
405	{	930	{
406	int i;	931	int pri;
407		932
408	for (i = 0; i < fdchangecnt; ++i)	933	for (pri = NUMPRI; pri--; )
409	{	934	if (pendingcnt [pri])
410	int fd = fdchanges [i];	935	return 1;
411	ANFD *anfd = anfds + fd;
412	struct ev_io *w;
413		936
414	int wev = 0;	937	return 0;
415
416	for (w = anfd->head; w; w = w->next)
417	wev |= w->events;
418
419	if (anfd->wev != wev)
420	{
421	method_modify (fd, anfd->wev, wev);
422	anfd->wev = wev;
423	}
424	}
425
426	fdchangecnt = 0;
427	}	938	}
428		939
429	static void	940	static void
430	call_pending ()	941	call_pending (EV_P)
431	{	942	{
		943	int pri;
		944
		945	for (pri = NUMPRI; pri--; )
432	while (pendingcnt)	946	while (pendingcnt [pri])
433	{	947	{
434	ANPENDING *p = pendings + --pendingcnt;	948	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
435		949
436	if (p->w)	950	if (p->w)
437	{	951	{
438	p->w->pending = 0;	952	p->w->pending = 0;
439	p->w->cb (p->w, p->events);	953	EV_CB_INVOKE (p->w, p->events);
440	}	954	}
441	}	955	}
442	}	956	}
443		957
444	static void	958	static void
445	timers_reify ()	959	timers_reify (EV_P)
446	{	960	{
447	while (timercnt && timers [0]->at <= now)	961	while (timercnt && ((WT)timers [0])->at <= mn_now)
448	{	962	{
449	struct ev_timer *w = timers [0];	963	struct ev_timer *w = timers [0];
450		964
451	event ((W)w, EV_TIMEOUT);	965	assert (("inactive timer on timer heap detected", ev_is_active (w)));
452		966
453	/* first reschedule or stop timer */	967	/* first reschedule or stop timer */
454	if (w->repeat)	968	if (w->repeat)
455	{	969	{
		970	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
456	w->at = now + w->repeat;	971	((WT)w)->at = mn_now + w->repeat;
457	assert (("timer timeout in the past, negative repeat?", w->at > now));
458	downheap ((WT *)timers, timercnt, 0);	972	downheap ((WT *)timers, timercnt, 0);
459	}	973	}
460	else	974	else
461	evtimer_stop (w); /* nonrepeating: stop timer */	975	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
462	}
463	}
464		976
		977	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		978	}
		979	}
		980
465	static void	981	static void
466	periodics_reify ()	982	periodics_reify (EV_P)
467	{	983	{
468	while (periodiccnt && periodics [0]->at <= ev_now)	984	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
469	{	985	{
470	struct ev_periodic *w = periodics [0];	986	struct ev_periodic *w = periodics [0];
471		987
		988	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		989
472	/* first reschedule or stop timer */	990	/* first reschedule or stop timer */
473	if (w->interval)	991	if (w->reschedule_cb)
474	{	992	{
		993	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001);
		994
		995	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));
		996	downheap ((WT *)periodics, periodiccnt, 0);
		997	}
		998	else if (w->interval)
		999	{
475	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1000	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
476	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1001	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
477	downheap ((WT *)periodics, periodiccnt, 0);	1002	downheap ((WT *)periodics, periodiccnt, 0);
478	}	1003	}
479	else	1004	else
480	evperiodic_stop (w); /* nonrepeating: stop timer */	1005	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
481		1006
482	event ((W)w, EV_TIMEOUT);	1007	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
483	}	1008	}
484	}	1009	}
485		1010
486	static void	1011	static void
487	periodics_reschedule (ev_tstamp diff)	1012	periodics_reschedule (EV_P)
488	{	1013	{
489	int i;	1014	int i;
490		1015
491	/* adjust periodics after time jump */	1016	/* adjust periodics after time jump */
492	for (i = 0; i < periodiccnt; ++i)	1017	for (i = 0; i < periodiccnt; ++i)
493	{	1018	{
494	struct ev_periodic *w = periodics [i];	1019	struct ev_periodic *w = periodics [i];
495		1020
		1021	if (w->reschedule_cb)
		1022	((WT)w)->at = w->reschedule_cb (w, rt_now);
496	if (w->interval)	1023	else if (w->interval)
		1024	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1025	}
		1026
		1027	/* now rebuild the heap */
		1028	for (i = periodiccnt >> 1; i--; )
		1029	downheap ((WT *)periodics, periodiccnt, i);
		1030	}
		1031
		1032	inline int
		1033	time_update_monotonic (EV_P)
		1034	{
		1035	mn_now = get_clock ();
		1036
		1037	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1038	{
		1039	rt_now = rtmn_diff + mn_now;
		1040	return 0;
		1041	}
		1042	else
		1043	{
		1044	now_floor = mn_now;
		1045	rt_now = ev_time ();
		1046	return 1;
		1047	}
		1048	}
		1049
		1050	static void
		1051	time_update (EV_P)
		1052	{
		1053	int i;
		1054
		1055	#if EV_USE_MONOTONIC
		1056	if (expect_true (have_monotonic))
		1057	{
		1058	if (time_update_monotonic (EV_A))
497	{	1059	{
498	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1060	ev_tstamp odiff = rtmn_diff;
499		1061
500	if (fabs (diff) >= 1e-4)	1062	for (i = 4; --i; ) /* loop a few times, before making important decisions */
501	{	1063	{
502	evperiodic_stop (w);	1064	rtmn_diff = rt_now - mn_now;
503	evperiodic_start (w);
504		1065
505	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1066	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1067	return; /* all is well */
		1068
		1069	rt_now = ev_time ();
		1070	mn_now = get_clock ();
		1071	now_floor = mn_now;
506	}	1072	}
		1073
		1074	periodics_reschedule (EV_A);
		1075	/* no timer adjustment, as the monotonic clock doesn't jump */
		1076	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
507	}	1077	}
508	}	1078	}
509	}	1079	else
510		1080	#endif
511	static void	1081	{
512	time_update ()
513	{
514	int i;
515
516	ev_now = ev_time ();	1082	rt_now = ev_time ();
517		1083
518	if (have_monotonic)	1084	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
519	{
520	ev_tstamp odiff = diff;
521
522	for (i = 4; --i; ) /* loop a few times, before making important decisions */
523	{	1085	{
524	now = get_clock ();
525	diff = ev_now - now;
526
527	if (fabs (odiff - diff) < MIN_TIMEJUMP)
528	return; /* all is well */
529
530	ev_now = ev_time ();
531	}
532
533	periodics_reschedule (diff - odiff);
534	/* no timer adjustment, as the monotonic clock doesn't jump */
535	}
536	else
537	{
538	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
539	{
540	periodics_reschedule (ev_now - now);	1086	periodics_reschedule (EV_A);
541		1087
542	/* adjust timers. this is easy, as the offset is the same for all */	1088	/* adjust timers. this is easy, as the offset is the same for all */
543	for (i = 0; i < timercnt; ++i)	1089	for (i = 0; i < timercnt; ++i)
544	timers [i]->at += diff;	1090	((WT)timers [i])->at += rt_now - mn_now;
545	}	1091	}
546		1092
547	now = ev_now;	1093	mn_now = rt_now;
548	}	1094	}
549	}	1095	}
550		1096
551	int ev_loop_done;	1097	void
		1098	ev_ref (EV_P)
		1099	{
		1100	++activecnt;
		1101	}
552		1102
		1103	void
		1104	ev_unref (EV_P)
		1105	{
		1106	--activecnt;
		1107	}
		1108
		1109	static int loop_done;
		1110
		1111	void
553	void ev_loop (int flags)	1112	ev_loop (EV_P_ int flags)
554	{	1113	{
555	double block;	1114	double block;
556	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1115	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
557
558	if (checkcnt)
559	{
560	queue_events ((W *)checks, checkcnt, EV_CHECK);
561	call_pending ();
562	}
563		1116
564	do	1117	do
565	{	1118	{
		1119	/* queue check watchers (and execute them) */
		1120	if (expect_false (preparecnt))
		1121	{
		1122	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1123	call_pending (EV_A);
		1124	}
		1125
		1126	/* we might have forked, so reify kernel state if necessary */
		1127	if (expect_false (postfork))
		1128	loop_fork (EV_A);
		1129
566	/* update fd-related kernel structures */	1130	/* update fd-related kernel structures */
567	fd_reify ();	1131	fd_reify (EV_A);
568		1132
569	/* calculate blocking time */	1133	/* calculate blocking time */
570		1134
571	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1135	/* we only need this for !monotonic clock or timers, but as we basically
		1136	always have timers, we just calculate it always */
		1137	#if EV_USE_MONOTONIC
		1138	if (expect_true (have_monotonic))
		1139	time_update_monotonic (EV_A);
		1140	else
		1141	#endif
		1142	{
572	ev_now = ev_time ();	1143	rt_now = ev_time ();
		1144	mn_now = rt_now;
		1145	}
573		1146
574	if (flags & EVLOOP_NONBLOCK || idlecnt)	1147	if (flags & EVLOOP_NONBLOCK || idlecnt)
575	block = 0.;	1148	block = 0.;
576	else	1149	else
577	{	1150	{
578	block = MAX_BLOCKTIME;	1151	block = MAX_BLOCKTIME;
579		1152
580	if (timercnt)	1153	if (timercnt)
581	{	1154	{
582	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1155	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
583	if (block > to) block = to;	1156	if (block > to) block = to;
584	}	1157	}
585		1158
586	if (periodiccnt)	1159	if (periodiccnt)
587	{	1160	{
588	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1161	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
589	if (block > to) block = to;	1162	if (block > to) block = to;
590	}	1163	}
591		1164
592	if (block < 0.) block = 0.;	1165	if (block < 0.) block = 0.;
593	}	1166	}
594		1167
595	method_poll (block);	1168	method_poll (EV_A_ block);
596		1169
597	/* update ev_now, do magic */	1170	/* update rt_now, do magic */
598	time_update ();	1171	time_update (EV_A);
599		1172
600	/* queue pending timers and reschedule them */	1173	/* queue pending timers and reschedule them */
		1174	timers_reify (EV_A); /* relative timers called last */
601	periodics_reify (); /* absolute timers first */	1175	periodics_reify (EV_A); /* absolute timers called first */
602	timers_reify (); /* relative timers second */
603		1176
604	/* queue idle watchers unless io or timers are pending */	1177	/* queue idle watchers unless io or timers are pending */
605	if (!pendingcnt)	1178	if (idlecnt && !any_pending (EV_A))
606	queue_events ((W *)idles, idlecnt, EV_IDLE);	1179	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
607		1180
608	/* queue check and possibly idle watchers */	1181	/* queue check watchers, to be executed first */
		1182	if (checkcnt)
609	queue_events ((W *)checks, checkcnt, EV_CHECK);	1183	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
610		1184
611	call_pending ();	1185	call_pending (EV_A);
612	}	1186	}
613	while (!ev_loop_done);	1187	while (activecnt && !loop_done);
614		1188
615	if (ev_loop_done != 2)	1189	if (loop_done != 2)
616	ev_loop_done = 0;	1190	loop_done = 0;
		1191	}
		1192
		1193	void
		1194	ev_unloop (EV_P_ int how)
		1195	{
		1196	loop_done = how;
617	}	1197	}
618		1198
619	/*****************************************************************************/	1199	/*****************************************************************************/
620		1200
621	static void	1201	inline void
622	wlist_add (WL *head, WL elem)	1202	wlist_add (WL *head, WL elem)
623	{	1203	{
624	elem->next = *head;	1204	elem->next = *head;
625	*head = elem;	1205	*head = elem;
626	}	1206	}
627		1207
628	static void	1208	inline void
629	wlist_del (WL *head, WL elem)	1209	wlist_del (WL *head, WL elem)
630	{	1210	{
631	while (*head)	1211	while (*head)
632	{	1212	{
633	if (*head == elem)	1213	if (*head == elem)
…		…
638		1218
639	head = &(*head)->next;	1219	head = &(*head)->next;
640	}	1220	}
641	}	1221	}
642		1222
643	static void	1223	inline void
644	ev_clear (W w)	1224	ev_clear_pending (EV_P_ W w)
645	{	1225	{
646	if (w->pending)	1226	if (w->pending)
647	{	1227	{
648	pendings [w->pending - 1].w = 0;	1228	pendings [ABSPRI (w)][w->pending - 1].w = 0;
649	w->pending = 0;	1229	w->pending = 0;
650	}	1230	}
651	}	1231	}
652		1232
653	static void	1233	inline void
654	ev_start (W w, int active)	1234	ev_start (EV_P_ W w, int active)
655	{	1235	{
		1236	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1237	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1238
656	w->active = active;	1239	w->active = active;
		1240	ev_ref (EV_A);
657	}	1241	}
658		1242
659	static void	1243	inline void
660	ev_stop (W w)	1244	ev_stop (EV_P_ W w)
661	{	1245	{
		1246	ev_unref (EV_A);
662	w->active = 0;	1247	w->active = 0;
663	}	1248	}
664		1249
665	/*****************************************************************************/	1250	/*****************************************************************************/
666		1251
667	void	1252	void
668	evio_start (struct ev_io *w)	1253	ev_io_start (EV_P_ struct ev_io *w)
669	{	1254	{
		1255	int fd = w->fd;
		1256
670	if (ev_is_active (w))	1257	if (ev_is_active (w))
671	return;	1258	return;
672		1259
673	int fd = w->fd;	1260	assert (("ev_io_start called with negative fd", fd >= 0));
674		1261
675	ev_start ((W)w, 1);	1262	ev_start (EV_A_ (W)w, 1);
676	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1263	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
677	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1264	wlist_add ((WL *)&anfds[fd].head, (WL)w);
678		1265
679	++fdchangecnt;	1266	fd_change (EV_A_ fd);
680	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
681	fdchanges [fdchangecnt - 1] = fd;
682	}	1267	}
683		1268
684	void	1269	void
685	evio_stop (struct ev_io *w)	1270	ev_io_stop (EV_P_ struct ev_io *w)
686	{	1271	{
687	ev_clear ((W)w);	1272	ev_clear_pending (EV_A_ (W)w);
688	if (!ev_is_active (w))	1273	if (!ev_is_active (w))
689	return;	1274	return;
690		1275
691	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1276	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
692	ev_stop ((W)w);	1277	ev_stop (EV_A_ (W)w);
693		1278
694	++fdchangecnt;	1279	fd_change (EV_A_ w->fd);
695	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
696	fdchanges [fdchangecnt - 1] = w->fd;
697	}	1280	}
698		1281
699	void	1282	void
700	evtimer_start (struct ev_timer *w)	1283	ev_timer_start (EV_P_ struct ev_timer *w)
701	{	1284	{
702	if (ev_is_active (w))	1285	if (ev_is_active (w))
703	return;	1286	return;
704		1287
705	w->at += now;	1288	((WT)w)->at += mn_now;
706		1289
707	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1290	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
708		1291
709	ev_start ((W)w, ++timercnt);	1292	ev_start (EV_A_ (W)w, ++timercnt);
710	array_needsize (timers, timermax, timercnt, );	1293	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
711	timers [timercnt - 1] = w;	1294	timers [timercnt - 1] = w;
712	upheap ((WT *)timers, timercnt - 1);	1295	upheap ((WT *)timers, timercnt - 1);
713	}
714		1296
		1297	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1298	}
		1299
715	void	1300	void
716	evtimer_stop (struct ev_timer *w)	1301	ev_timer_stop (EV_P_ struct ev_timer *w)
717	{	1302	{
718	ev_clear ((W)w);	1303	ev_clear_pending (EV_A_ (W)w);
719	if (!ev_is_active (w))	1304	if (!ev_is_active (w))
720	return;	1305	return;
721		1306
		1307	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1308
722	if (w->active < timercnt--)	1309	if (((W)w)->active < timercnt--)
723	{	1310	{
724	timers [w->active - 1] = timers [timercnt];	1311	timers [((W)w)->active - 1] = timers [timercnt];
725	downheap ((WT *)timers, timercnt, w->active - 1);	1312	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
726	}	1313	}
727		1314
728	w->at = w->repeat;	1315	((WT)w)->at = w->repeat;
729		1316
730	ev_stop ((W)w);	1317	ev_stop (EV_A_ (W)w);
731	}	1318	}
732		1319
733	void	1320	void
734	evtimer_again (struct ev_timer *w)	1321	ev_timer_again (EV_P_ struct ev_timer *w)
735	{	1322	{
736	if (ev_is_active (w))	1323	if (ev_is_active (w))
737	{	1324	{
738	if (w->repeat)	1325	if (w->repeat)
739	{	1326	{
740	w->at = now + w->repeat;	1327	((WT)w)->at = mn_now + w->repeat;
741	downheap ((WT *)timers, timercnt, w->active - 1);	1328	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
742	}	1329	}
743	else	1330	else
744	evtimer_stop (w);	1331	ev_timer_stop (EV_A_ w);
745	}	1332	}
746	else if (w->repeat)	1333	else if (w->repeat)
747	evtimer_start (w);	1334	ev_timer_start (EV_A_ w);
748	}	1335	}
749		1336
750	void	1337	void
751	evperiodic_start (struct ev_periodic *w)	1338	ev_periodic_start (EV_P_ struct ev_periodic *w)
752	{	1339	{
753	if (ev_is_active (w))	1340	if (ev_is_active (w))
754	return;	1341	return;
755		1342
756	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1343	if (w->reschedule_cb)
757		1344	((WT)w)->at = w->reschedule_cb (w, rt_now);
		1345	else if (w->interval)
		1346	{
		1347	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
758	/* this formula differs from the one in periodic_reify because we do not always round up */	1348	/* this formula differs from the one in periodic_reify because we do not always round up */
759	if (w->interval)
760	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1349	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1350	}
761		1351
762	ev_start ((W)w, ++periodiccnt);	1352	ev_start (EV_A_ (W)w, ++periodiccnt);
763	array_needsize (periodics, periodicmax, periodiccnt, );	1353	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
764	periodics [periodiccnt - 1] = w;	1354	periodics [periodiccnt - 1] = w;
765	upheap ((WT *)periodics, periodiccnt - 1);	1355	upheap ((WT *)periodics, periodiccnt - 1);
766	}
767		1356
		1357	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1358	}
		1359
768	void	1360	void
769	evperiodic_stop (struct ev_periodic *w)	1361	ev_periodic_stop (EV_P_ struct ev_periodic *w)
770	{	1362	{
771	ev_clear ((W)w);	1363	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1364	if (!ev_is_active (w))
773	return;	1365	return;
774		1366
		1367	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1368
775	if (w->active < periodiccnt--)	1369	if (((W)w)->active < periodiccnt--)
776	{	1370	{
777	periodics [w->active - 1] = periodics [periodiccnt];	1371	periodics [((W)w)->active - 1] = periodics [periodiccnt];
778	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1372	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
779	}	1373	}
780		1374
781	ev_stop ((W)w);	1375	ev_stop (EV_A_ (W)w);
782	}	1376	}
783		1377
784	void	1378	void
785	evsignal_start (struct ev_signal *w)	1379	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1380	{
		1381	ev_periodic_stop (EV_A_ w);
		1382	ev_periodic_start (EV_A_ w);
		1383	}
		1384
		1385	void
		1386	ev_idle_start (EV_P_ struct ev_idle *w)
786	{	1387	{
787	if (ev_is_active (w))	1388	if (ev_is_active (w))
788	return;	1389	return;
789		1390
		1391	ev_start (EV_A_ (W)w, ++idlecnt);
		1392	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1393	idles [idlecnt - 1] = w;
		1394	}
		1395
		1396	void
		1397	ev_idle_stop (EV_P_ struct ev_idle *w)
		1398	{
		1399	ev_clear_pending (EV_A_ (W)w);
		1400	if (ev_is_active (w))
		1401	return;
		1402
		1403	idles [((W)w)->active - 1] = idles [--idlecnt];
		1404	ev_stop (EV_A_ (W)w);
		1405	}
		1406
		1407	void
		1408	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1409	{
		1410	if (ev_is_active (w))
		1411	return;
		1412
		1413	ev_start (EV_A_ (W)w, ++preparecnt);
		1414	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1415	prepares [preparecnt - 1] = w;
		1416	}
		1417
		1418	void
		1419	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1420	{
		1421	ev_clear_pending (EV_A_ (W)w);
		1422	if (ev_is_active (w))
		1423	return;
		1424
		1425	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1426	ev_stop (EV_A_ (W)w);
		1427	}
		1428
		1429	void
		1430	ev_check_start (EV_P_ struct ev_check *w)
		1431	{
		1432	if (ev_is_active (w))
		1433	return;
		1434
		1435	ev_start (EV_A_ (W)w, ++checkcnt);
		1436	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1437	checks [checkcnt - 1] = w;
		1438	}
		1439
		1440	void
		1441	ev_check_stop (EV_P_ struct ev_check *w)
		1442	{
		1443	ev_clear_pending (EV_A_ (W)w);
		1444	if (ev_is_active (w))
		1445	return;
		1446
		1447	checks [((W)w)->active - 1] = checks [--checkcnt];
		1448	ev_stop (EV_A_ (W)w);
		1449	}
		1450
		1451	#ifndef SA_RESTART
		1452	# define SA_RESTART 0
		1453	#endif
		1454
		1455	void
		1456	ev_signal_start (EV_P_ struct ev_signal *w)
		1457	{
		1458	#if EV_MULTIPLICITY
		1459	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1460	#endif
		1461	if (ev_is_active (w))
		1462	return;
		1463
		1464	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1465
790	ev_start ((W)w, 1);	1466	ev_start (EV_A_ (W)w, 1);
791	array_needsize (signals, signalmax, w->signum, signals_init);	1467	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
792	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1468	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
793		1469
794	if (!w->next)	1470	if (!((WL)w)->next)
795	{	1471	{
		1472	#if WIN32
		1473	signal (w->signum, sighandler);
		1474	#else
796	struct sigaction sa;	1475	struct sigaction sa;
797	sa.sa_handler = sighandler;	1476	sa.sa_handler = sighandler;
798	sigfillset (&sa.sa_mask);	1477	sigfillset (&sa.sa_mask);
799	sa.sa_flags = 0;	1478	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
800	sigaction (w->signum, &sa, 0);	1479	sigaction (w->signum, &sa, 0);
		1480	#endif
801	}	1481	}
802	}	1482	}
803		1483
804	void	1484	void
805	evsignal_stop (struct ev_signal *w)	1485	ev_signal_stop (EV_P_ struct ev_signal *w)
806	{	1486	{
807	ev_clear ((W)w);	1487	ev_clear_pending (EV_A_ (W)w);
808	if (!ev_is_active (w))	1488	if (!ev_is_active (w))
809	return;	1489	return;
810		1490
811	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1491	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
812	ev_stop ((W)w);	1492	ev_stop (EV_A_ (W)w);
813		1493
814	if (!signals [w->signum - 1].head)	1494	if (!signals [w->signum - 1].head)
815	signal (w->signum, SIG_DFL);	1495	signal (w->signum, SIG_DFL);
816	}	1496	}
817		1497
818	void evidle_start (struct ev_idle *w)	1498	void
		1499	ev_child_start (EV_P_ struct ev_child *w)
819	{	1500	{
		1501	#if EV_MULTIPLICITY
		1502	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1503	#endif
820	if (ev_is_active (w))	1504	if (ev_is_active (w))
821	return;	1505	return;
822		1506
823	ev_start ((W)w, ++idlecnt);	1507	ev_start (EV_A_ (W)w, 1);
824	array_needsize (idles, idlemax, idlecnt, );	1508	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
825	idles [idlecnt - 1] = w;
826	}	1509	}
827		1510
828	void evidle_stop (struct ev_idle *w)	1511	void
		1512	ev_child_stop (EV_P_ struct ev_child *w)
829	{	1513	{
830	ev_clear ((W)w);	1514	ev_clear_pending (EV_A_ (W)w);
831	if (ev_is_active (w))	1515	if (ev_is_active (w))
832	return;	1516	return;
833		1517
834	idles [w->active - 1] = idles [--idlecnt];	1518	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
835	ev_stop ((W)w);	1519	ev_stop (EV_A_ (W)w);
836	}
837
838	void evcheck_start (struct ev_check *w)
839	{
840	if (ev_is_active (w))
841	return;
842
843	ev_start ((W)w, ++checkcnt);
844	array_needsize (checks, checkmax, checkcnt, );
845	checks [checkcnt - 1] = w;
846	}
847
848	void evcheck_stop (struct ev_check *w)
849	{
850	ev_clear ((W)w);
851	if (ev_is_active (w))
852	return;
853
854	checks [w->active - 1] = checks [--checkcnt];
855	ev_stop ((W)w);
856	}	1520	}
857		1521
858	/*****************************************************************************/	1522	/*****************************************************************************/
859		1523
860	struct ev_once	1524	struct ev_once
…		…
864	void (*cb)(int revents, void *arg);	1528	void (*cb)(int revents, void *arg);
865	void *arg;	1529	void *arg;
866	};	1530	};
867		1531
868	static void	1532	static void
869	once_cb (struct ev_once *once, int revents)	1533	once_cb (EV_P_ struct ev_once *once, int revents)
870	{	1534	{
871	void (*cb)(int revents, void *arg) = once->cb;	1535	void (*cb)(int revents, void *arg) = once->cb;
872	void *arg = once->arg;	1536	void *arg = once->arg;
873		1537
874	evio_stop (&once->io);	1538	ev_io_stop (EV_A_ &once->io);
875	evtimer_stop (&once->to);	1539	ev_timer_stop (EV_A_ &once->to);
876	free (once);	1540	ev_free (once);
877		1541
878	cb (revents, arg);	1542	cb (revents, arg);
879	}	1543	}
880		1544
881	static void	1545	static void
882	once_cb_io (struct ev_io *w, int revents)	1546	once_cb_io (EV_P_ struct ev_io *w, int revents)
883	{	1547	{
884	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1548	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
885	}	1549	}
886		1550
887	static void	1551	static void
888	once_cb_to (struct ev_timer *w, int revents)	1552	once_cb_to (EV_P_ struct ev_timer *w, int revents)
889	{	1553	{
890	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1554	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
891	}	1555	}
892		1556
893	void	1557	void
894	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1558	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
895	{	1559	{
896	struct ev_once *once = malloc (sizeof (struct ev_once));	1560	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
897		1561
898	if (!once)	1562	if (!once)
899	cb (EV_ERROR, arg);	1563	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
900	else	1564	else
901	{	1565	{
902	once->cb = cb;	1566	once->cb = cb;
903	once->arg = arg;	1567	once->arg = arg;
904		1568
905	evw_init (&once->io, once_cb_io);	1569	ev_init (&once->io, once_cb_io);
906
907	if (fd >= 0)	1570	if (fd >= 0)
908	{	1571	{
909	evio_set (&once->io, fd, events);	1572	ev_io_set (&once->io, fd, events);
910	evio_start (&once->io);	1573	ev_io_start (EV_A_ &once->io);
911	}	1574	}
912		1575
913	evw_init (&once->to, once_cb_to);	1576	ev_init (&once->to, once_cb_to);
914
915	if (timeout >= 0.)	1577	if (timeout >= 0.)
916	{	1578	{
917	evtimer_set (&once->to, timeout, 0.);	1579	ev_timer_set (&once->to, timeout, 0.);
918	evtimer_start (&once->to);	1580	ev_timer_start (EV_A_ &once->to);
919	}	1581	}
920	}	1582	}
921	}	1583	}
922		1584
923	/*****************************************************************************/
924
925	#if 0
926
927	struct ev_io wio;
928
929	static void
930	sin_cb (struct ev_io *w, int revents)
931	{
932	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
933	}
934
935	static void
936	ocb (struct ev_timer *w, int revents)
937	{
938	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
939	evtimer_stop (w);
940	evtimer_start (w);
941	}
942
943	static void
944	scb (struct ev_signal *w, int revents)
945	{
946	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
947	evio_stop (&wio);
948	evio_start (&wio);
949	}
950
951	static void
952	gcb (struct ev_signal *w, int revents)
953	{
954	fprintf (stderr, "generic %x\n", revents);
955
956	}
957
958	int main (void)
959	{
960	ev_init (0);
961
962	evio_init (&wio, sin_cb, 0, EV_READ);
963	evio_start (&wio);
964
965	struct ev_timer t[10000];
966
967	#if 0
968	int i;
969	for (i = 0; i < 10000; ++i)
970	{
971	struct ev_timer *w = t + i;
972	evw_init (w, ocb, i);
973	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
974	evtimer_start (w);
975	if (drand48 () < 0.5)
976	evtimer_stop (w);
977	}
978	#endif
979
980	struct ev_timer t1;
981	evtimer_init (&t1, ocb, 5, 10);
982	evtimer_start (&t1);
983
984	struct ev_signal sig;
985	evsignal_init (&sig, scb, SIGQUIT);
986	evsignal_start (&sig);
987
988	struct ev_check cw;
989	evcheck_init (&cw, gcb);
990	evcheck_start (&cw);
991
992	struct ev_idle iw;
993	evidle_init (&iw, gcb);
994	evidle_start (&iw);
995
996	ev_loop (0);
997
998	return 0;
999	}
1000
1001	#endif
1002
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1004
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