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Comparing libev/ev.c (file contents):
Revision 1.17 by root, Wed Oct 31 14:44:15 2007 UTC vs.
Revision 1.79 by root, Fri Nov 9 15:15:20 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	};
		225	# undef VAR
		226	# include "ev_wrap.h"
		227
		228	#else
		229
		230	# define VAR(name,decl) static decl;
		231	# include "ev_vars.h"
		232	# undef VAR
		233
		234	#endif
		235
		236	/*****************************************************************************/
		237
		238	inline ev_tstamp
86	ev_time (void)	239	ev_time (void)
87	{	240	{
88	#if HAVE_REALTIME	241	#if EV_USE_REALTIME
89	struct timespec ts;	242	struct timespec ts;
90	clock_gettime (CLOCK_REALTIME, &ts);	243	clock_gettime (CLOCK_REALTIME, &ts);
91	return ts.tv_sec + ts.tv_nsec * 1e-9;	244	return ts.tv_sec + ts.tv_nsec * 1e-9;
92	#else	245	#else
93	struct timeval tv;	246	struct timeval tv;
94	gettimeofday (&tv, 0);	247	gettimeofday (&tv, 0);
95	return tv.tv_sec + tv.tv_usec * 1e-6;	248	return tv.tv_sec + tv.tv_usec * 1e-6;
96	#endif	249	#endif
97	}	250	}
98		251
99	static ev_tstamp	252	inline ev_tstamp
100	get_clock (void)	253	get_clock (void)
101	{	254	{
102	#if HAVE_MONOTONIC	255	#if EV_USE_MONOTONIC
103	if (have_monotonic)	256	if (expect_true (have_monotonic))
104	{	257	{
105	struct timespec ts;	258	struct timespec ts;
106	clock_gettime (CLOCK_MONOTONIC, &ts);	259	clock_gettime (CLOCK_MONOTONIC, &ts);
107	return ts.tv_sec + ts.tv_nsec * 1e-9;	260	return ts.tv_sec + ts.tv_nsec * 1e-9;
108	}	261	}
109	#endif	262	#endif
110		263
111	return ev_time ();	264	return ev_time ();
112	}	265	}
113		266
		267	ev_tstamp
		268	ev_now (EV_P)
		269	{
		270	return rt_now;
		271	}
		272
		273	#define array_roundsize(type,n) ((n) | 4 & ~3)
		274
114	#define array_needsize(base,cur,cnt,init) \	275	#define array_needsize(type,base,cur,cnt,init) \
115	if ((cnt) > cur) \	276	if (expect_false ((cnt) > cur)) \
116	{ \	277	{ \
117	int newcnt = cur ? cur << 1 : 16; \	278	int newcnt = cur; \
		279	do \
		280	{ \
		281	newcnt = array_roundsize (type, newcnt << 1); \
		282	} \
		283	while ((cnt) > newcnt); \
		284	\
118	base = realloc (base, sizeof (*base) * (newcnt)); \	285	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
119	init (base + cur, newcnt - cur); \	286	init (base + cur, newcnt - cur); \
120	cur = newcnt; \	287	cur = newcnt; \
121	}	288	}
		289
		290	#define array_slim(type,stem) \
		291	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		292	{ \
		293	stem ## max = array_roundsize (stem ## cnt >> 1); \
		294	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		295	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		296	}
		297
		298	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		299	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		300	#define array_free_microshit(stem) \
		301	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		302
		303	#define array_free(stem, idx) \
		304	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
122		305
123	/*****************************************************************************/	306	/*****************************************************************************/
124		307
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	308	static void
138	anfds_init (ANFD *base, int count)	309	anfds_init (ANFD *base, int count)
139	{	310	{
140	while (count--)	311	while (count--)
141	{	312	{
142	base->head = 0;	313	base->head = 0;
143	base->wev = base->rev = EV_NONE;	314	base->events = EV_NONE;
		315	base->reify = 0;
		316
144	++base;	317	++base;
145	}	318	}
146	}	319	}
147		320
148	typedef struct	321	void
		322	ev_feed_event (EV_P_ void *w, int revents)
149	{	323	{
150	W w;	324	W w_ = (W)w;
151	int events;
152	} ANPENDING;
153		325
154	static ANPENDING *pendings;	326	if (w_->pending)
155	static int pendingmax, pendingcnt;
156
157	static void
158	event (W w, int events)
159	{
160	if (w->active)
161	{	327	{
162	w->pending = ++pendingcnt;
163	array_needsize (pendings, pendingmax, pendingcnt, );
164	pendings [pendingcnt - 1].w = w;
165	pendings [pendingcnt - 1].events = events;	328	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		329	return;
166	}	330	}
167	}
168		331
		332	w_->pending = ++pendingcnt [ABSPRI (w_)];
		333	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
		334	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		335	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		336	}
		337
169	static void	338	static void
		339	queue_events (EV_P_ W *events, int eventcnt, int type)
		340	{
		341	int i;
		342
		343	for (i = 0; i < eventcnt; ++i)
		344	ev_feed_event (EV_A_ events [i], type);
		345	}
		346
		347	inline void
170	fd_event (int fd, int events)	348	fd_event (EV_P_ int fd, int revents)
171	{	349	{
172	ANFD *anfd = anfds + fd;	350	ANFD *anfd = anfds + fd;
173	struct ev_io *w;	351	struct ev_io *w;
174		352
175	for (w = anfd->head; w; w = w->next)	353	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
176	{	354	{
177	int ev = w->events & events;	355	int ev = w->events & revents;
178		356
179	if (ev)	357	if (ev)
180	event ((W)w, ev);	358	ev_feed_event (EV_A_ (W)w, ev);
181	}	359	}
182	}	360	}
183		361
		362	void
		363	ev_feed_fd_event (EV_P_ int fd, int revents)
		364	{
		365	fd_event (EV_A_ fd, revents);
		366	}
		367
		368	/*****************************************************************************/
		369
184	static void	370	static void
185	queue_events (W *events, int eventcnt, int type)	371	fd_reify (EV_P)
186	{	372	{
187	int i;	373	int i;
188		374
189	for (i = 0; i < eventcnt; ++i)	375	for (i = 0; i < fdchangecnt; ++i)
190	event (events [i], type);	376	{
		377	int fd = fdchanges [i];
		378	ANFD *anfd = anfds + fd;
		379	struct ev_io *w;
		380
		381	int events = 0;
		382
		383	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		384	events |= w->events;
		385
		386	anfd->reify = 0;
		387
		388	method_modify (EV_A_ fd, anfd->events, events);
		389	anfd->events = events;
		390	}
		391
		392	fdchangecnt = 0;
		393	}
		394
		395	static void
		396	fd_change (EV_P_ int fd)
		397	{
		398	if (anfds [fd].reify)
		399	return;
		400
		401	anfds [fd].reify = 1;
		402
		403	++fdchangecnt;
		404	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		405	fdchanges [fdchangecnt - 1] = fd;
		406	}
		407
		408	static void
		409	fd_kill (EV_P_ int fd)
		410	{
		411	struct ev_io *w;
		412
		413	while ((w = (struct ev_io *)anfds [fd].head))
		414	{
		415	ev_io_stop (EV_A_ w);
		416	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		417	}
		418	}
		419
		420	static int
		421	fd_valid (int fd)
		422	{
		423	#ifdef WIN32
		424	return !!win32_get_osfhandle (fd);
		425	#else
		426	return fcntl (fd, F_GETFD) != -1;
		427	#endif
		428	}
		429
		430	/* called on EBADF to verify fds */
		431	static void
		432	fd_ebadf (EV_P)
		433	{
		434	int fd;
		435
		436	for (fd = 0; fd < anfdmax; ++fd)
		437	if (anfds [fd].events)
		438	if (!fd_valid (fd) == -1 && errno == EBADF)
		439	fd_kill (EV_A_ fd);
		440	}
		441
		442	/* called on ENOMEM in select/poll to kill some fds and retry */
		443	static void
		444	fd_enomem (EV_P)
		445	{
		446	int fd;
		447
		448	for (fd = anfdmax; fd--; )
		449	if (anfds [fd].events)
		450	{
		451	fd_kill (EV_A_ fd);
		452	return;
		453	}
		454	}
		455
		456	/* usually called after fork if method needs to re-arm all fds from scratch */
		457	static void
		458	fd_rearm_all (EV_P)
		459	{
		460	int fd;
		461
		462	/* this should be highly optimised to not do anything but set a flag */
		463	for (fd = 0; fd < anfdmax; ++fd)
		464	if (anfds [fd].events)
		465	{
		466	anfds [fd].events = 0;
		467	fd_change (EV_A_ fd);
		468	}
191	}	469	}
192		470
193	/*****************************************************************************/	471	/*****************************************************************************/
194		472
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	473	static void
202	upheap (WT *timers, int k)	474	upheap (WT *heap, int k)
203	{	475	{
204	WT w = timers [k];	476	WT w = heap [k];
205		477
206	while (k && timers [k >> 1]->at > w->at)	478	while (k && heap [k >> 1]->at > w->at)
207	{	479	{
208	timers [k] = timers [k >> 1];	480	heap [k] = heap [k >> 1];
209	timers [k]->active = k + 1;	481	((W)heap [k])->active = k + 1;
210	k >>= 1;	482	k >>= 1;
211	}	483	}
212		484
213	timers [k] = w;	485	heap [k] = w;
214	timers [k]->active = k + 1;	486	((W)heap [k])->active = k + 1;
215		487
216	}	488	}
217		489
218	static void	490	static void
219	downheap (WT *timers, int N, int k)	491	downheap (WT *heap, int N, int k)
220	{	492	{
221	WT w = timers [k];	493	WT w = heap [k];
222		494
223	while (k < (N >> 1))	495	while (k < (N >> 1))
224	{	496	{
225	int j = k << 1;	497	int j = k << 1;
226		498
227	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	499	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
228	++j;	500	++j;
229		501
230	if (w->at <= timers [j]->at)	502	if (w->at <= heap [j]->at)
231	break;	503	break;
232		504
233	timers [k] = timers [j];	505	heap [k] = heap [j];
234	timers [k]->active = k + 1;	506	((W)heap [k])->active = k + 1;
235	k = j;	507	k = j;
236	}	508	}
237		509
238	timers [k] = w;	510	heap [k] = w;
239	timers [k]->active = k + 1;	511	((W)heap [k])->active = k + 1;
240	}	512	}
241		513
242	/*****************************************************************************/	514	/*****************************************************************************/
243		515
244	typedef struct	516	typedef struct
245	{	517	{
246	struct ev_signal *head;	518	WL head;
247	sig_atomic_t gotsig;	519	sig_atomic_t volatile gotsig;
248	} ANSIG;	520	} ANSIG;
249		521
250	static ANSIG *signals;	522	static ANSIG *signals;
251	static int signalmax;	523	static int signalmax;
252		524
253	static int sigpipe [2];	525	static int sigpipe [2];
254	static sig_atomic_t gotsig;	526	static sig_atomic_t volatile gotsig;
255	static struct ev_io sigev;	527	static struct ev_io sigev;
256		528
257	static void	529	static void
258	signals_init (ANSIG *base, int count)	530	signals_init (ANSIG *base, int count)
259	{	531	{
260	while (count--)	532	while (count--)
261	{	533	{
262	base->head = 0;	534	base->head = 0;
263	base->gotsig = 0;	535	base->gotsig = 0;
		536
264	++base;	537	++base;
265	}	538	}
266	}	539	}
267		540
268	static void	541	static void
269	sighandler (int signum)	542	sighandler (int signum)
270	{	543	{
		544	#if WIN32
		545	signal (signum, sighandler);
		546	#endif
		547
271	signals [signum - 1].gotsig = 1;	548	signals [signum - 1].gotsig = 1;
272		549
273	if (!gotsig)	550	if (!gotsig)
274	{	551	{
		552	int old_errno = errno;
275	gotsig = 1;	553	gotsig = 1;
		554	#ifdef WIN32
		555	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		556	#else
276	write (sigpipe [1], &gotsig, 1);	557	write (sigpipe [1], &signum, 1);
		558	#endif
		559	errno = old_errno;
277	}	560	}
278	}	561	}
279		562
		563	void
		564	ev_feed_signal_event (EV_P_ int signum)
		565	{
		566	#if EV_MULTIPLICITY
		567	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		568	#endif
		569
		570	--signum;
		571
		572	if (signum < 0 || signum >= signalmax)
		573	return;
		574
		575	signals [signum].gotsig = 0;
		576
		577	for (w = signals [signum].head; w; w = w->next)
		578	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		579	}
		580
280	static void	581	static void
281	sigcb (struct ev_io *iow, int revents)	582	sigcb (EV_P_ struct ev_io *iow, int revents)
282	{	583	{
283	struct ev_signal *w;	584	WL w;
284	int sig;	585	int signum;
285		586
		587	#ifdef WIN32
		588	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		589	#else
		590	read (sigpipe [0], &revents, 1);
		591	#endif
286	gotsig = 0;	592	gotsig = 0;
287	read (sigpipe [0], &revents, 1);
288		593
289	for (sig = signalmax; sig--; )	594	for (signum = signalmax; signum--; )
290	if (signals [sig].gotsig)	595	if (signals [signum].gotsig)
291	{	596	sigevent (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	}	597	}
298		598
299	static void	599	static void
300	siginit (void)	600	siginit (EV_P)
301	{	601	{
		602	#ifndef WIN32
302	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	603	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
303	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	604	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
304		605
305	/* rather than sort out wether we really need nb, set it */	606	/* rather than sort out wether we really need nb, set it */
306	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	607	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
307	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	608	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		609	#endif
308		610
309	evio_set (&sigev, sigpipe [0], EV_READ);	611	ev_io_set (&sigev, sigpipe [0], EV_READ);
310	evio_start (&sigev);	612	ev_io_start (EV_A_ &sigev);
		613	ev_unref (EV_A); /* child watcher should not keep loop alive */
311	}	614	}
312		615
313	/*****************************************************************************/	616	/*****************************************************************************/
314		617
315	static struct ev_idle **idles;	618	static struct ev_child *childs [PID_HASHSIZE];
316	static int idlemax, idlecnt;
317		619
318	static struct ev_check **checks;	620	#ifndef WIN32
319	static int checkmax, checkcnt;	621
		622	static struct ev_signal childev;
		623
		624	#ifndef WCONTINUED
		625	# define WCONTINUED 0
		626	#endif
		627
		628	static void
		629	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		630	{
		631	struct ev_child *w;
		632
		633	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		634	if (w->pid == pid || !w->pid)
		635	{
		636	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		637	w->rpid = pid;
		638	w->rstatus = status;
		639	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		640	}
		641	}
		642
		643	static void
		644	childcb (EV_P_ struct ev_signal *sw, int revents)
		645	{
		646	int pid, status;
		647
		648	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		649	{
		650	/* make sure we are called again until all childs have been reaped */
		651	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		652
		653	child_reap (EV_A_ sw, pid, pid, status);
		654	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		655	}
		656	}
		657
		658	#endif
320		659
321	/*****************************************************************************/	660	/*****************************************************************************/
322		661
		662	#if EV_USE_KQUEUE
		663	# include "ev_kqueue.c"
		664	#endif
323	#if HAVE_EPOLL	665	#if EV_USE_EPOLL
324	# include "ev_epoll.c"	666	# include "ev_epoll.c"
325	#endif	667	#endif
		668	#if EV_USE_POLL
		669	# include "ev_poll.c"
		670	#endif
326	#if HAVE_SELECT	671	#if EV_USE_SELECT
327	# include "ev_select.c"	672	# include "ev_select.c"
328	#endif	673	#endif
329		674
330	int ev_init (int flags)	675	int
		676	ev_version_major (void)
331	{	677	{
		678	return EV_VERSION_MAJOR;
		679	}
		680
		681	int
		682	ev_version_minor (void)
		683	{
		684	return EV_VERSION_MINOR;
		685	}
		686
		687	/* return true if we are running with elevated privileges and should ignore env variables */
		688	static int
		689	enable_secure (void)
		690	{
		691	#ifdef WIN32
		692	return 0;
		693	#else
		694	return getuid () != geteuid ()
		695	|| getgid () != getegid ();
		696	#endif
		697	}
		698
		699	int
		700	ev_method (EV_P)
		701	{
		702	return method;
		703	}
		704
		705	static void
		706	loop_init (EV_P_ int methods)
		707	{
		708	if (!method)
		709	{
332	#if HAVE_MONOTONIC	710	#if EV_USE_MONOTONIC
333	{	711	{
334	struct timespec ts;	712	struct timespec ts;
335	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	713	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
336	have_monotonic = 1;	714	have_monotonic = 1;
337	}	715	}
338	#endif	716	#endif
339		717
340	ev_now = ev_time ();	718	rt_now = ev_time ();
341	now = get_clock ();	719	mn_now = get_clock ();
342	diff = ev_now - now;	720	now_floor = mn_now;
		721	rtmn_diff = rt_now - mn_now;
343		722
		723	if (methods == EVMETHOD_AUTO)
		724	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		725	methods = atoi (getenv ("LIBEV_METHODS"));
		726	else
		727	methods = EVMETHOD_ANY;
		728
		729	method = 0;
		730	#if EV_USE_WIN32
		731	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		732	#endif
		733	#if EV_USE_KQUEUE
		734	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		735	#endif
		736	#if EV_USE_EPOLL
		737	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		738	#endif
		739	#if EV_USE_POLL
		740	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		741	#endif
		742	#if EV_USE_SELECT
		743	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		744	#endif
		745
		746	ev_watcher_init (&sigev, sigcb);
		747	ev_set_priority (&sigev, EV_MAXPRI);
		748	}
		749	}
		750
		751	void
		752	loop_destroy (EV_P)
		753	{
		754	int i;
		755
		756	#if EV_USE_WIN32
		757	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		758	#endif
		759	#if EV_USE_KQUEUE
		760	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		761	#endif
		762	#if EV_USE_EPOLL
		763	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		764	#endif
		765	#if EV_USE_POLL
		766	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		767	#endif
		768	#if EV_USE_SELECT
		769	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		770	#endif
		771
		772	for (i = NUMPRI; i--; )
		773	array_free (pending, [i]);
		774
		775	/* have to use the microsoft-never-gets-it-right macro */
		776	array_free_microshit (fdchange);
		777	array_free_microshit (timer);
		778	array_free_microshit (periodic);
		779	array_free_microshit (idle);
		780	array_free_microshit (prepare);
		781	array_free_microshit (check);
		782
		783	method = 0;
		784	}
		785
		786	static void
		787	loop_fork (EV_P)
		788	{
		789	#if EV_USE_EPOLL
		790	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		791	#endif
		792	#if EV_USE_KQUEUE
		793	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		794	#endif
		795
		796	if (ev_is_active (&sigev))
		797	{
		798	/* default loop */
		799
		800	ev_ref (EV_A);
		801	ev_io_stop (EV_A_ &sigev);
		802	close (sigpipe [0]);
		803	close (sigpipe [1]);
		804
		805	while (pipe (sigpipe))
		806	syserr ("(libev) error creating pipe");
		807
		808	siginit (EV_A);
		809	}
		810
		811	postfork = 0;
		812	}
		813
		814	#if EV_MULTIPLICITY
		815	struct ev_loop *
		816	ev_loop_new (int methods)
		817	{
		818	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		819
		820	memset (loop, 0, sizeof (struct ev_loop));
		821
		822	loop_init (EV_A_ methods);
		823
		824	if (ev_method (EV_A))
		825	return loop;
		826
		827	return 0;
		828	}
		829
		830	void
		831	ev_loop_destroy (EV_P)
		832	{
		833	loop_destroy (EV_A);
		834	ev_free (loop);
		835	}
		836
		837	void
		838	ev_loop_fork (EV_P)
		839	{
		840	postfork = 1;
		841	}
		842
		843	#endif
		844
		845	#if EV_MULTIPLICITY
		846	struct ev_loop default_loop_struct;
		847	static struct ev_loop *default_loop;
		848
		849	struct ev_loop *
		850	#else
		851	static int default_loop;
		852
		853	int
		854	#endif
		855	ev_default_loop (int methods)
		856	{
		857	if (sigpipe [0] == sigpipe [1])
344	if (pipe (sigpipe))	858	if (pipe (sigpipe))
345	return 0;	859	return 0;
346		860
347	ev_method = EVMETHOD_NONE;	861	if (!default_loop)
348	#if HAVE_EPOLL	862	{
349	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	863	#if EV_MULTIPLICITY
		864	struct ev_loop *loop = default_loop = &default_loop_struct;
		865	#else
		866	default_loop = 1;
350	#endif	867	#endif
351	#if HAVE_SELECT
352	if (ev_method == EVMETHOD_NONE) select_init (flags);
353	#endif
354		868
		869	loop_init (EV_A_ methods);
		870
		871	if (ev_method (EV_A))
		872	{
		873	siginit (EV_A);
		874
		875	#ifndef WIN32
		876	ev_signal_init (&childev, childcb, SIGCHLD);
		877	ev_set_priority (&childev, EV_MAXPRI);
		878	ev_signal_start (EV_A_ &childev);
		879	ev_unref (EV_A); /* child watcher should not keep loop alive */
		880	#endif
		881	}
		882	else
		883	default_loop = 0;
		884	}
		885
		886	return default_loop;
		887	}
		888
		889	void
		890	ev_default_destroy (void)
		891	{
		892	#if EV_MULTIPLICITY
		893	struct ev_loop *loop = default_loop;
		894	#endif
		895
		896	#ifndef WIN32
		897	ev_ref (EV_A); /* child watcher */
		898	ev_signal_stop (EV_A_ &childev);
		899	#endif
		900
		901	ev_ref (EV_A); /* signal watcher */
		902	ev_io_stop (EV_A_ &sigev);
		903
		904	close (sigpipe [0]); sigpipe [0] = 0;
		905	close (sigpipe [1]); sigpipe [1] = 0;
		906
		907	loop_destroy (EV_A);
		908	}
		909
		910	void
		911	ev_default_fork (void)
		912	{
		913	#if EV_MULTIPLICITY
		914	struct ev_loop *loop = default_loop;
		915	#endif
		916
355	if (ev_method)	917	if (method)
356	{	918	postfork = 1;
357	evw_init (&sigev, sigcb);
358	siginit ();
359	}
360
361	return ev_method;
362	}	919	}
363		920
364	/*****************************************************************************/	921	/*****************************************************************************/
365		922
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	923	static int
393	fd_reify (void)	924	any_pending (EV_P)
394	{	925	{
395	int i;	926	int pri;
396		927
397	for (i = 0; i < fdchangecnt; ++i)	928	for (pri = NUMPRI; pri--; )
398	{	929	if (pendingcnt [pri])
399	int fd = fdchanges [i];	930	return 1;
400	ANFD *anfd = anfds + fd;
401	struct ev_io *w;
402		931
403	int wev = 0;	932	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	}	933	}
417		934
418	static void	935	static void
419	call_pending ()	936	call_pending (EV_P)
420	{	937	{
421	int i;	938	int pri;
422		939
423	for (i = 0; i < pendingcnt; ++i)	940	for (pri = NUMPRI; pri--; )
		941	while (pendingcnt [pri])
424	{	942	{
425	ANPENDING *p = pendings + i;	943	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
426		944
427	if (p->w)	945	if (p->w)
428	{	946	{
429	p->w->pending = 0;	947	p->w->pending = 0;
430	p->w->cb (p->w, p->events);	948	p->w->cb (EV_A_ p->w, p->events);
431	}	949	}
432	}	950	}
433
434	pendingcnt = 0;
435	}	951	}
436		952
437	static void	953	static void
438	timers_reify ()	954	timers_reify (EV_P)
439	{	955	{
440	while (timercnt && timers [0]->at <= now)	956	while (timercnt && ((WT)timers [0])->at <= mn_now)
441	{	957	{
442	struct ev_timer *w = timers [0];	958	struct ev_timer *w = timers [0];
443		959
444	event ((W)w, EV_TIMEOUT);	960	assert (("inactive timer on timer heap detected", ev_is_active (w)));
445		961
446	/* first reschedule or stop timer */	962	/* first reschedule or stop timer */
447	if (w->repeat)	963	if (w->repeat)
448	{	964	{
		965	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
449	w->at = now + w->repeat;	966	((WT)w)->at = mn_now + w->repeat;
450	assert (("timer timeout in the past, negative repeat?", w->at > now));
451	downheap ((WT *)timers, timercnt, 0);	967	downheap ((WT *)timers, timercnt, 0);
452	}	968	}
453	else	969	else
454	evtimer_stop (w); /* nonrepeating: stop timer */	970	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
455	}
456	}
457		971
		972	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		973	}
		974	}
		975
458	static void	976	static void
459	periodics_reify ()	977	periodics_reify (EV_P)
460	{	978	{
461	while (periodiccnt && periodics [0]->at <= ev_now)	979	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
462	{	980	{
463	struct ev_periodic *w = periodics [0];	981	struct ev_periodic *w = periodics [0];
464		982
		983	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		984
465	/* first reschedule or stop timer */	985	/* first reschedule or stop timer */
466	if (w->interval)	986	if (w->reschedule_cb)
467	{	987	{
		988	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001);
		989
		990	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));
		991	downheap ((WT *)periodics, periodiccnt, 0);
		992	}
		993	else if (w->interval)
		994	{
468	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	995	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
469	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	996	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
470	downheap ((WT *)periodics, periodiccnt, 0);	997	downheap ((WT *)periodics, periodiccnt, 0);
471	}	998	}
472	else	999	else
473	evperiodic_stop (w); /* nonrepeating: stop timer */	1000	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
474		1001
475	event ((W)w, EV_TIMEOUT);	1002	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
476	}	1003	}
477	}	1004	}
478		1005
479	static void	1006	static void
480	periodics_reschedule (ev_tstamp diff)	1007	periodics_reschedule (EV_P)
481	{	1008	{
482	int i;	1009	int i;
483		1010
484	/* adjust periodics after time jump */	1011	/* adjust periodics after time jump */
485	for (i = 0; i < periodiccnt; ++i)	1012	for (i = 0; i < periodiccnt; ++i)
486	{	1013	{
487	struct ev_periodic *w = periodics [i];	1014	struct ev_periodic *w = periodics [i];
488		1015
		1016	if (w->reschedule_cb)
		1017	((WT)w)->at = w->reschedule_cb (w, rt_now);
489	if (w->interval)	1018	else if (w->interval)
		1019	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1020	}
		1021
		1022	/* now rebuild the heap */
		1023	for (i = periodiccnt >> 1; i--; )
		1024	downheap ((WT *)periodics, periodiccnt, i);
		1025	}
		1026
		1027	inline int
		1028	time_update_monotonic (EV_P)
		1029	{
		1030	mn_now = get_clock ();
		1031
		1032	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1033	{
		1034	rt_now = rtmn_diff + mn_now;
		1035	return 0;
		1036	}
		1037	else
		1038	{
		1039	now_floor = mn_now;
		1040	rt_now = ev_time ();
		1041	return 1;
		1042	}
		1043	}
		1044
		1045	static void
		1046	time_update (EV_P)
		1047	{
		1048	int i;
		1049
		1050	#if EV_USE_MONOTONIC
		1051	if (expect_true (have_monotonic))
		1052	{
		1053	if (time_update_monotonic (EV_A))
490	{	1054	{
491	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1055	ev_tstamp odiff = rtmn_diff;
492		1056
493	if (fabs (diff) >= 1e-4)	1057	for (i = 4; --i; ) /* loop a few times, before making important decisions */
494	{	1058	{
495	evperiodic_stop (w);	1059	rtmn_diff = rt_now - mn_now;
496	evperiodic_start (w);
497		1060
498	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1061	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1062	return; /* all is well */
		1063
		1064	rt_now = ev_time ();
		1065	mn_now = get_clock ();
		1066	now_floor = mn_now;
499	}	1067	}
		1068
		1069	periodics_reschedule (EV_A);
		1070	/* no timer adjustment, as the monotonic clock doesn't jump */
		1071	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
500	}	1072	}
501	}	1073	}
502	}	1074	else
503		1075	#endif
504	static void	1076	{
505	time_update ()
506	{
507	int i;
508
509	ev_now = ev_time ();	1077	rt_now = ev_time ();
510		1078
511	if (have_monotonic)	1079	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
512	{
513	ev_tstamp odiff = diff;
514
515	for (i = 4; --i; ) /* loop a few times, before making important decisions */
516	{	1080	{
517	now = get_clock ();
518	diff = ev_now - now;
519
520	if (fabs (odiff - diff) < MIN_TIMEJUMP)
521	return; /* all is well */
522
523	ev_now = ev_time ();
524	}
525
526	periodics_reschedule (diff - odiff);
527	/* no timer adjustment, as the monotonic clock doesn't jump */
528	}
529	else
530	{
531	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
532	{
533	periodics_reschedule (ev_now - now);	1081	periodics_reschedule (EV_A);
534		1082
535	/* adjust timers. this is easy, as the offset is the same for all */	1083	/* adjust timers. this is easy, as the offset is the same for all */
536	for (i = 0; i < timercnt; ++i)	1084	for (i = 0; i < timercnt; ++i)
537	timers [i]->at += diff;	1085	((WT)timers [i])->at += rt_now - mn_now;
538	}	1086	}
539		1087
540	now = ev_now;	1088	mn_now = rt_now;
541	}	1089	}
542	}	1090	}
543		1091
544	int ev_loop_done;	1092	void
		1093	ev_ref (EV_P)
		1094	{
		1095	++activecnt;
		1096	}
545		1097
		1098	void
		1099	ev_unref (EV_P)
		1100	{
		1101	--activecnt;
		1102	}
		1103
		1104	static int loop_done;
		1105
		1106	void
546	void ev_loop (int flags)	1107	ev_loop (EV_P_ int flags)
547	{	1108	{
548	double block;	1109	double block;
549	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1110	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
550
551	if (checkcnt)
552	{
553	queue_events ((W *)checks, checkcnt, EV_CHECK);
554	call_pending ();
555	}
556		1111
557	do	1112	do
558	{	1113	{
		1114	/* queue check watchers (and execute them) */
		1115	if (expect_false (preparecnt))
		1116	{
		1117	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1118	call_pending (EV_A);
		1119	}
		1120
		1121	/* we might have forked, so reify kernel state if necessary */
		1122	if (expect_false (postfork))
		1123	loop_fork (EV_A);
		1124
559	/* update fd-related kernel structures */	1125	/* update fd-related kernel structures */
560	fd_reify ();	1126	fd_reify (EV_A);
561		1127
562	/* calculate blocking time */	1128	/* calculate blocking time */
563		1129
564	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1130	/* we only need this for !monotonic clock or timers, but as we basically
		1131	always have timers, we just calculate it always */
		1132	#if EV_USE_MONOTONIC
		1133	if (expect_true (have_monotonic))
		1134	time_update_monotonic (EV_A);
		1135	else
		1136	#endif
		1137	{
565	ev_now = ev_time ();	1138	rt_now = ev_time ();
		1139	mn_now = rt_now;
		1140	}
566		1141
567	if (flags & EVLOOP_NONBLOCK || idlecnt)	1142	if (flags & EVLOOP_NONBLOCK || idlecnt)
568	block = 0.;	1143	block = 0.;
569	else	1144	else
570	{	1145	{
571	block = MAX_BLOCKTIME;	1146	block = MAX_BLOCKTIME;
572		1147
573	if (timercnt)	1148	if (timercnt)
574	{	1149	{
575	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1150	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
576	if (block > to) block = to;	1151	if (block > to) block = to;
577	}	1152	}
578		1153
579	if (periodiccnt)	1154	if (periodiccnt)
580	{	1155	{
581	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1156	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
582	if (block > to) block = to;	1157	if (block > to) block = to;
583	}	1158	}
584		1159
585	if (block < 0.) block = 0.;	1160	if (block < 0.) block = 0.;
586	}	1161	}
587		1162
588	method_poll (block);	1163	method_poll (EV_A_ block);
589		1164
590	/* update ev_now, do magic */	1165	/* update rt_now, do magic */
591	time_update ();	1166	time_update (EV_A);
592		1167
593	/* queue pending timers and reschedule them */	1168	/* queue pending timers and reschedule them */
		1169	timers_reify (EV_A); /* relative timers called last */
594	periodics_reify (); /* absolute timers first */	1170	periodics_reify (EV_A); /* absolute timers called first */
595	timers_reify (); /* relative timers second */
596		1171
597	/* queue idle watchers unless io or timers are pending */	1172	/* queue idle watchers unless io or timers are pending */
598	if (!pendingcnt)	1173	if (idlecnt && !any_pending (EV_A))
599	queue_events ((W *)idles, idlecnt, EV_IDLE);	1174	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
600		1175
601	/* queue check and possibly idle watchers */	1176	/* queue check watchers, to be executed first */
		1177	if (checkcnt)
602	queue_events ((W *)checks, checkcnt, EV_CHECK);	1178	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
603		1179
604	call_pending ();	1180	call_pending (EV_A);
605	}	1181	}
606	while (!ev_loop_done);	1182	while (activecnt && !loop_done);
607		1183
608	if (ev_loop_done != 2)	1184	if (loop_done != 2)
609	ev_loop_done = 0;	1185	loop_done = 0;
		1186	}
		1187
		1188	void
		1189	ev_unloop (EV_P_ int how)
		1190	{
		1191	loop_done = how;
610	}	1192	}
611		1193
612	/*****************************************************************************/	1194	/*****************************************************************************/
613		1195
614	static void	1196	inline void
615	wlist_add (WL *head, WL elem)	1197	wlist_add (WL *head, WL elem)
616	{	1198	{
617	elem->next = *head;	1199	elem->next = *head;
618	*head = elem;	1200	*head = elem;
619	}	1201	}
620		1202
621	static void	1203	inline void
622	wlist_del (WL *head, WL elem)	1204	wlist_del (WL *head, WL elem)
623	{	1205	{
624	while (*head)	1206	while (*head)
625	{	1207	{
626	if (*head == elem)	1208	if (*head == elem)
…		…
631		1213
632	head = &(*head)->next;	1214	head = &(*head)->next;
633	}	1215	}
634	}	1216	}
635		1217
636	static void	1218	inline void
637	ev_clear (W w)	1219	ev_clear_pending (EV_P_ W w)
638	{	1220	{
639	if (w->pending)	1221	if (w->pending)
640	{	1222	{
641	pendings [w->pending - 1].w = 0;	1223	pendings [ABSPRI (w)][w->pending - 1].w = 0;
642	w->pending = 0;	1224	w->pending = 0;
643	}	1225	}
644	}	1226	}
645		1227
646	static void	1228	inline void
647	ev_start (W w, int active)	1229	ev_start (EV_P_ W w, int active)
648	{	1230	{
		1231	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1232	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1233
649	w->active = active;	1234	w->active = active;
		1235	ev_ref (EV_A);
650	}	1236	}
651		1237
652	static void	1238	inline void
653	ev_stop (W w)	1239	ev_stop (EV_P_ W w)
654	{	1240	{
		1241	ev_unref (EV_A);
655	w->active = 0;	1242	w->active = 0;
656	}	1243	}
657		1244
658	/*****************************************************************************/	1245	/*****************************************************************************/
659		1246
660	void	1247	void
661	evio_start (struct ev_io *w)	1248	ev_io_start (EV_P_ struct ev_io *w)
662	{	1249	{
		1250	int fd = w->fd;
		1251
663	if (ev_is_active (w))	1252	if (ev_is_active (w))
664	return;	1253	return;
665		1254
666	int fd = w->fd;	1255	assert (("ev_io_start called with negative fd", fd >= 0));
667		1256
668	ev_start ((W)w, 1);	1257	ev_start (EV_A_ (W)w, 1);
669	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1258	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
670	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1259	wlist_add ((WL *)&anfds[fd].head, (WL)w);
671		1260
672	++fdchangecnt;	1261	fd_change (EV_A_ fd);
673	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
674	fdchanges [fdchangecnt - 1] = fd;
675	}	1262	}
676		1263
677	void	1264	void
678	evio_stop (struct ev_io *w)	1265	ev_io_stop (EV_P_ struct ev_io *w)
679	{	1266	{
680	ev_clear ((W)w);	1267	ev_clear_pending (EV_A_ (W)w);
681	if (!ev_is_active (w))	1268	if (!ev_is_active (w))
682	return;	1269	return;
683		1270
684	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1271	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
685	ev_stop ((W)w);	1272	ev_stop (EV_A_ (W)w);
686		1273
687	++fdchangecnt;	1274	fd_change (EV_A_ w->fd);
688	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
689	fdchanges [fdchangecnt - 1] = w->fd;
690	}	1275	}
691		1276
692	void	1277	void
693	evtimer_start (struct ev_timer *w)	1278	ev_timer_start (EV_P_ struct ev_timer *w)
694	{	1279	{
695	if (ev_is_active (w))	1280	if (ev_is_active (w))
696	return;	1281	return;
697		1282
698	w->at += now;	1283	((WT)w)->at += mn_now;
699		1284
700	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1285	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
701		1286
702	ev_start ((W)w, ++timercnt);	1287	ev_start (EV_A_ (W)w, ++timercnt);
703	array_needsize (timers, timermax, timercnt, );	1288	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
704	timers [timercnt - 1] = w;	1289	timers [timercnt - 1] = w;
705	upheap ((WT *)timers, timercnt - 1);	1290	upheap ((WT *)timers, timercnt - 1);
706	}
707		1291
		1292	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1293	}
		1294
708	void	1295	void
709	evtimer_stop (struct ev_timer *w)	1296	ev_timer_stop (EV_P_ struct ev_timer *w)
710	{	1297	{
711	ev_clear ((W)w);	1298	ev_clear_pending (EV_A_ (W)w);
712	if (!ev_is_active (w))	1299	if (!ev_is_active (w))
713	return;	1300	return;
714		1301
		1302	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1303
715	if (w->active < timercnt--)	1304	if (((W)w)->active < timercnt--)
716	{	1305	{
717	timers [w->active - 1] = timers [timercnt];	1306	timers [((W)w)->active - 1] = timers [timercnt];
718	downheap ((WT *)timers, timercnt, w->active - 1);	1307	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
719	}	1308	}
720		1309
721	w->at = w->repeat;	1310	((WT)w)->at = w->repeat;
722		1311
723	ev_stop ((W)w);	1312	ev_stop (EV_A_ (W)w);
724	}	1313	}
725		1314
726	void	1315	void
727	evtimer_again (struct ev_timer *w)	1316	ev_timer_again (EV_P_ struct ev_timer *w)
728	{	1317	{
729	if (ev_is_active (w))	1318	if (ev_is_active (w))
730	{	1319	{
731	if (w->repeat)	1320	if (w->repeat)
732	{	1321	{
733	w->at = now + w->repeat;	1322	((WT)w)->at = mn_now + w->repeat;
734	downheap ((WT *)timers, timercnt, w->active - 1);	1323	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
735	}	1324	}
736	else	1325	else
737	evtimer_stop (w);	1326	ev_timer_stop (EV_A_ w);
738	}	1327	}
739	else if (w->repeat)	1328	else if (w->repeat)
740	evtimer_start (w);	1329	ev_timer_start (EV_A_ w);
741	}	1330	}
742		1331
743	void	1332	void
744	evperiodic_start (struct ev_periodic *w)	1333	ev_periodic_start (EV_P_ struct ev_periodic *w)
745	{	1334	{
746	if (ev_is_active (w))	1335	if (ev_is_active (w))
747	return;	1336	return;
748		1337
749	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1338	if (w->reschedule_cb)
750		1339	((WT)w)->at = w->reschedule_cb (w, rt_now);
		1340	else if (w->interval)
		1341	{
		1342	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
751	/* this formula differs from the one in periodic_reify because we do not always round up */	1343	/* this formula differs from the one in periodic_reify because we do not always round up */
752	if (w->interval)
753	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1344	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1345	}
754		1346
755	ev_start ((W)w, ++periodiccnt);	1347	ev_start (EV_A_ (W)w, ++periodiccnt);
756	array_needsize (periodics, periodicmax, periodiccnt, );	1348	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
757	periodics [periodiccnt - 1] = w;	1349	periodics [periodiccnt - 1] = w;
758	upheap ((WT *)periodics, periodiccnt - 1);	1350	upheap ((WT *)periodics, periodiccnt - 1);
759	}
760		1351
		1352	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1353	}
		1354
761	void	1355	void
762	evperiodic_stop (struct ev_periodic *w)	1356	ev_periodic_stop (EV_P_ struct ev_periodic *w)
763	{	1357	{
764	ev_clear ((W)w);	1358	ev_clear_pending (EV_A_ (W)w);
765	if (!ev_is_active (w))	1359	if (!ev_is_active (w))
766	return;	1360	return;
767		1361
		1362	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1363
768	if (w->active < periodiccnt--)	1364	if (((W)w)->active < periodiccnt--)
769	{	1365	{
770	periodics [w->active - 1] = periodics [periodiccnt];	1366	periodics [((W)w)->active - 1] = periodics [periodiccnt];
771	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1367	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
772	}	1368	}
773		1369
774	ev_stop ((W)w);	1370	ev_stop (EV_A_ (W)w);
775	}	1371	}
776		1372
777	void	1373	void
778	evsignal_start (struct ev_signal *w)	1374	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1375	{
		1376	ev_periodic_stop (EV_A_ w);
		1377	ev_periodic_start (EV_A_ w);
		1378	}
		1379
		1380	void
		1381	ev_idle_start (EV_P_ struct ev_idle *w)
779	{	1382	{
780	if (ev_is_active (w))	1383	if (ev_is_active (w))
781	return;	1384	return;
782		1385
		1386	ev_start (EV_A_ (W)w, ++idlecnt);
		1387	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1388	idles [idlecnt - 1] = w;
		1389	}
		1390
		1391	void
		1392	ev_idle_stop (EV_P_ struct ev_idle *w)
		1393	{
		1394	ev_clear_pending (EV_A_ (W)w);
		1395	if (ev_is_active (w))
		1396	return;
		1397
		1398	idles [((W)w)->active - 1] = idles [--idlecnt];
		1399	ev_stop (EV_A_ (W)w);
		1400	}
		1401
		1402	void
		1403	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1404	{
		1405	if (ev_is_active (w))
		1406	return;
		1407
		1408	ev_start (EV_A_ (W)w, ++preparecnt);
		1409	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1410	prepares [preparecnt - 1] = w;
		1411	}
		1412
		1413	void
		1414	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1415	{
		1416	ev_clear_pending (EV_A_ (W)w);
		1417	if (ev_is_active (w))
		1418	return;
		1419
		1420	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1421	ev_stop (EV_A_ (W)w);
		1422	}
		1423
		1424	void
		1425	ev_check_start (EV_P_ struct ev_check *w)
		1426	{
		1427	if (ev_is_active (w))
		1428	return;
		1429
		1430	ev_start (EV_A_ (W)w, ++checkcnt);
		1431	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1432	checks [checkcnt - 1] = w;
		1433	}
		1434
		1435	void
		1436	ev_check_stop (EV_P_ struct ev_check *w)
		1437	{
		1438	ev_clear_pending (EV_A_ (W)w);
		1439	if (ev_is_active (w))
		1440	return;
		1441
		1442	checks [((W)w)->active - 1] = checks [--checkcnt];
		1443	ev_stop (EV_A_ (W)w);
		1444	}
		1445
		1446	#ifndef SA_RESTART
		1447	# define SA_RESTART 0
		1448	#endif
		1449
		1450	void
		1451	ev_signal_start (EV_P_ struct ev_signal *w)
		1452	{
		1453	#if EV_MULTIPLICITY
		1454	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1455	#endif
		1456	if (ev_is_active (w))
		1457	return;
		1458
		1459	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1460
783	ev_start ((W)w, 1);	1461	ev_start (EV_A_ (W)w, 1);
784	array_needsize (signals, signalmax, w->signum, signals_init);	1462	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
785	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1463	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
786		1464
787	if (!w->next)	1465	if (!((WL)w)->next)
788	{	1466	{
		1467	#if WIN32
		1468	signal (w->signum, sighandler);
		1469	#else
789	struct sigaction sa;	1470	struct sigaction sa;
790	sa.sa_handler = sighandler;	1471	sa.sa_handler = sighandler;
791	sigfillset (&sa.sa_mask);	1472	sigfillset (&sa.sa_mask);
792	sa.sa_flags = 0;	1473	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
793	sigaction (w->signum, &sa, 0);	1474	sigaction (w->signum, &sa, 0);
		1475	#endif
794	}	1476	}
795	}	1477	}
796		1478
797	void	1479	void
798	evsignal_stop (struct ev_signal *w)	1480	ev_signal_stop (EV_P_ struct ev_signal *w)
799	{	1481	{
800	ev_clear ((W)w);	1482	ev_clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1483	if (!ev_is_active (w))
802	return;	1484	return;
803		1485
804	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1486	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
805	ev_stop ((W)w);	1487	ev_stop (EV_A_ (W)w);
806		1488
807	if (!signals [w->signum - 1].head)	1489	if (!signals [w->signum - 1].head)
808	signal (w->signum, SIG_DFL);	1490	signal (w->signum, SIG_DFL);
809	}	1491	}
810		1492
811	void evidle_start (struct ev_idle *w)	1493	void
		1494	ev_child_start (EV_P_ struct ev_child *w)
812	{	1495	{
		1496	#if EV_MULTIPLICITY
		1497	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1498	#endif
813	if (ev_is_active (w))	1499	if (ev_is_active (w))
814	return;	1500	return;
815		1501
816	ev_start ((W)w, ++idlecnt);	1502	ev_start (EV_A_ (W)w, 1);
817	array_needsize (idles, idlemax, idlecnt, );	1503	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
818	idles [idlecnt - 1] = w;
819	}	1504	}
820		1505
821	void evidle_stop (struct ev_idle *w)	1506	void
		1507	ev_child_stop (EV_P_ struct ev_child *w)
822	{	1508	{
823	ev_clear ((W)w);	1509	ev_clear_pending (EV_A_ (W)w);
824	if (ev_is_active (w))	1510	if (ev_is_active (w))
825	return;	1511	return;
826		1512
827	idles [w->active - 1] = idles [--idlecnt];	1513	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
828	ev_stop ((W)w);	1514	ev_stop (EV_A_ (W)w);
829	}
830
831	void evcheck_start (struct ev_check *w)
832	{
833	if (ev_is_active (w))
834	return;
835
836	ev_start ((W)w, ++checkcnt);
837	array_needsize (checks, checkmax, checkcnt, );
838	checks [checkcnt - 1] = w;
839	}
840
841	void evcheck_stop (struct ev_check *w)
842	{
843	ev_clear ((W)w);
844	if (ev_is_active (w))
845	return;
846
847	checks [w->active - 1] = checks [--checkcnt];
848	ev_stop ((W)w);
849	}	1515	}
850		1516
851	/*****************************************************************************/	1517	/*****************************************************************************/
852		1518
853	struct ev_once	1519	struct ev_once
…		…
857	void (*cb)(int revents, void *arg);	1523	void (*cb)(int revents, void *arg);
858	void *arg;	1524	void *arg;
859	};	1525	};
860		1526
861	static void	1527	static void
862	once_cb (struct ev_once *once, int revents)	1528	once_cb (EV_P_ struct ev_once *once, int revents)
863	{	1529	{
864	void (*cb)(int revents, void *arg) = once->cb;	1530	void (*cb)(int revents, void *arg) = once->cb;
865	void *arg = once->arg;	1531	void *arg = once->arg;
866		1532
867	evio_stop (&once->io);	1533	ev_io_stop (EV_A_ &once->io);
868	evtimer_stop (&once->to);	1534	ev_timer_stop (EV_A_ &once->to);
869	free (once);	1535	ev_free (once);
870		1536
871	cb (revents, arg);	1537	cb (revents, arg);
872	}	1538	}
873		1539
874	static void	1540	static void
875	once_cb_io (struct ev_io *w, int revents)	1541	once_cb_io (EV_P_ struct ev_io *w, int revents)
876	{	1542	{
877	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1543	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
878	}	1544	}
879		1545
880	static void	1546	static void
881	once_cb_to (struct ev_timer *w, int revents)	1547	once_cb_to (EV_P_ struct ev_timer *w, int revents)
882	{	1548	{
883	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1549	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
884	}	1550	}
885		1551
886	void	1552	void
887	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1553	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
888	{	1554	{
889	struct ev_once *once = malloc (sizeof (struct ev_once));	1555	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
890		1556
891	if (!once)	1557	if (!once)
892	cb (EV_ERROR, arg);	1558	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
893	else	1559	else
894	{	1560	{
895	once->cb = cb;	1561	once->cb = cb;
896	once->arg = arg;	1562	once->arg = arg;
897		1563
898	evw_init (&once->io, once_cb_io);	1564	ev_watcher_init (&once->io, once_cb_io);
899
900	if (fd >= 0)	1565	if (fd >= 0)
901	{	1566	{
902	evio_set (&once->io, fd, events);	1567	ev_io_set (&once->io, fd, events);
903	evio_start (&once->io);	1568	ev_io_start (EV_A_ &once->io);
904	}	1569	}
905		1570
906	evw_init (&once->to, once_cb_to);	1571	ev_watcher_init (&once->to, once_cb_to);
907
908	if (timeout >= 0.)	1572	if (timeout >= 0.)
909	{	1573	{
910	evtimer_set (&once->to, timeout, 0.);	1574	ev_timer_set (&once->to, timeout, 0.);
911	evtimer_start (&once->to);	1575	ev_timer_start (EV_A_ &once->to);
912	}	1576	}
913	}	1577	}
914	}	1578	}
915		1579
916	/*****************************************************************************/
917
918	#if 0
919
920	struct ev_io wio;
921
922	static void
923	sin_cb (struct ev_io *w, int revents)
924	{
925	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
926	}
927
928	static void
929	ocb (struct ev_timer *w, int revents)
930	{
931	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
932	evtimer_stop (w);
933	evtimer_start (w);
934	}
935
936	static void
937	scb (struct ev_signal *w, int revents)
938	{
939	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
940	evio_stop (&wio);
941	evio_start (&wio);
942	}
943
944	static void
945	gcb (struct ev_signal *w, int revents)
946	{
947	fprintf (stderr, "generic %x\n", revents);
948
949	}
950
951	int main (void)
952	{
953	ev_init (0);
954
955	evio_init (&wio, sin_cb, 0, EV_READ);
956	evio_start (&wio);
957
958	struct ev_timer t[10000];
959
960	#if 0
961	int i;
962	for (i = 0; i < 10000; ++i)
963	{
964	struct ev_timer *w = t + i;
965	evw_init (w, ocb, i);
966	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
967	evtimer_start (w);
968	if (drand48 () < 0.5)
969	evtimer_stop (w);
970	}
971	#endif
972
973	struct ev_timer t1;
974	evtimer_init (&t1, ocb, 5, 10);
975	evtimer_start (&t1);
976
977	struct ev_signal sig;
978	evsignal_init (&sig, scb, SIGQUIT);
979	evsignal_start (&sig);
980
981	struct ev_check cw;
982	evcheck_init (&cw, gcb);
983	evcheck_start (&cw);
984
985	struct ev_idle iw;
986	evidle_init (&iw, gcb);
987	evidle_start (&iw);
988
989	ev_loop (0);
990
991	return 0;
992	}
993
994	#endif
995
996
997
998

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