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

Comparing libev/ev.c (file contents):
Revision 1.23 by root, Wed Oct 31 20:10:17 2007 UTC vs.
Revision 1.135 by root, Sat Nov 24 06:23:27 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
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	*/
29		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
		37	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
		40	# include "config.h"
		41	# endif
		42
		43	# if HAVE_CLOCK_GETTIME
		44	# ifndef EV_USE_MONOTONIC
		45	# define EV_USE_MONOTONIC 1
		46	# endif
		47	# ifndef EV_USE_REALTIME
		48	# define EV_USE_REALTIME 1
		49	# endif
		50	# else
		51	# ifndef EV_USE_MONOTONIC
		52	# define EV_USE_MONOTONIC 0
		53	# endif
		54	# ifndef EV_USE_REALTIME
		55	# define EV_USE_REALTIME 0
		56	# endif
		57	# endif
		58
		59	# ifndef EV_USE_SELECT
		60	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		61	# define EV_USE_SELECT 1
		62	# else
		63	# define EV_USE_SELECT 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_POLL
		68	# if HAVE_POLL && HAVE_POLL_H
		69	# define EV_USE_POLL 1
		70	# else
		71	# define EV_USE_POLL 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_EPOLL
		76	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		77	# define EV_USE_EPOLL 1
		78	# else
		79	# define EV_USE_EPOLL 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_KQUEUE
		84	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		85	# define EV_USE_KQUEUE 1
		86	# else
		87	# define EV_USE_KQUEUE 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_PORT
		92	# if HAVE_PORT_H && HAVE_PORT_CREATE
		93	# define EV_USE_PORT 1
		94	# else
		95	# define EV_USE_PORT 0
		96	# endif
		97	# endif
		98
		99	#endif
		100
30	#include <math.h>	101	#include <math.h>
31	#include <stdlib.h>	102	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	103	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	104	#include <stddef.h>
36		105
37	#include <stdio.h>	106	#include <stdio.h>
38		107
39	#include <assert.h>	108	#include <assert.h>
40	#include <errno.h>	109	#include <errno.h>
41	#include <sys/types.h>	110	#include <sys/types.h>
42	#include <sys/wait.h>
43	#include <sys/time.h>
44	#include <time.h>	111	#include <time.h>
45		112
46	#ifndef HAVE_MONOTONIC	113	#include <signal.h>
47	# ifdef CLOCK_MONOTONIC	114
48	# define HAVE_MONOTONIC 1	115	#ifndef _WIN32
		116	# include <unistd.h>
		117	# include <sys/time.h>
		118	# include <sys/wait.h>
		119	#else
		120	# define WIN32_LEAN_AND_MEAN
		121	# include <windows.h>
		122	# ifndef EV_SELECT_IS_WINSOCKET
		123	# define EV_SELECT_IS_WINSOCKET 1
49	# endif	124	# endif
50	#endif	125	#endif
51		126
		127	/**/
		128
		129	#ifndef EV_USE_MONOTONIC
		130	# define EV_USE_MONOTONIC 0
		131	#endif
		132
		133	#ifndef EV_USE_REALTIME
		134	# define EV_USE_REALTIME 0
		135	#endif
		136
52	#ifndef HAVE_SELECT	137	#ifndef EV_USE_SELECT
53	# define HAVE_SELECT 1	138	# define EV_USE_SELECT 1
		139	#endif
		140
		141	#ifndef EV_USE_POLL
		142	# ifdef _WIN32
		143	# define EV_USE_POLL 0
		144	# else
		145	# define EV_USE_POLL 1
54	#endif	146	# endif
		147	#endif
55		148
56	#ifndef HAVE_EPOLL	149	#ifndef EV_USE_EPOLL
57	# define HAVE_EPOLL 0	150	# define EV_USE_EPOLL 0
58	#endif	151	#endif
59		152
		153	#ifndef EV_USE_KQUEUE
		154	# define EV_USE_KQUEUE 0
		155	#endif
		156
		157	#ifndef EV_USE_PORT
		158	# define EV_USE_PORT 0
		159	#endif
		160
		161	/**/
		162
		163	#ifndef CLOCK_MONOTONIC
		164	# undef EV_USE_MONOTONIC
		165	# define EV_USE_MONOTONIC 0
		166	#endif
		167
60	#ifndef HAVE_REALTIME	168	#ifndef CLOCK_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	169	# undef EV_USE_REALTIME
		170	# define EV_USE_REALTIME 0
62	#endif	171	#endif
		172
		173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
		175	#endif
		176
		177	/**/
63		178
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	179	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	180	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	181	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		182	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds */
67		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
68	#include "ev.h"	187	# include "ev.h"
		188	#endif
		189
		190	#if __GNUC__ >= 3
		191	# define expect(expr,value) __builtin_expect ((expr),(value))
		192	# define inline static inline
		193	#else
		194	# define expect(expr,value) (expr)
		195	# define inline static
		196	#endif
		197
		198	#define expect_false(expr) expect ((expr) != 0, 0)
		199	#define expect_true(expr) expect ((expr) != 0, 1)
		200
		201	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		202	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		203
		204	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		205	#define EMPTY2(a,b) /* used to suppress some warnings */
69		206
70	typedef struct ev_watcher *W;	207	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	208	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	209	typedef struct ev_watcher_time *WT;
73		210
74	static ev_tstamp now, diff; /* monotonic clock */	211	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		212
		213	#ifdef _WIN32
		214	# include "ev_win32.c"
		215	#endif
		216
		217	/*****************************************************************************/
		218
		219	static void (syserr_cb)(const char msg);
		220
		221	void ev_set_syserr_cb (void (cb)(const char msg))
		222	{
		223	syserr_cb = cb;
		224	}
		225
		226	static void
		227	syserr (const char *msg)
		228	{
		229	if (!msg)
		230	msg = "(libev) system error";
		231
		232	if (syserr_cb)
		233	syserr_cb (msg);
		234	else
		235	{
		236	perror (msg);
		237	abort ();
		238	}
		239	}
		240
		241	static void (alloc)(void *ptr, long size);
		242
		243	void ev_set_allocator (void (cb)(void *ptr, long size))
		244	{
		245	alloc = cb;
		246	}
		247
		248	static void *
		249	ev_realloc (void *ptr, long size)
		250	{
		251	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		252
		253	if (!ptr && size)
		254	{
		255	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		256	abort ();
		257	}
		258
		259	return ptr;
		260	}
		261
		262	#define ev_malloc(size) ev_realloc (0, (size))
		263	#define ev_free(ptr) ev_realloc ((ptr), 0)
		264
		265	/*****************************************************************************/
		266
		267	typedef struct
		268	{
		269	WL head;
		270	unsigned char events;
		271	unsigned char reify;
		272	#if EV_SELECT_IS_WINSOCKET
		273	SOCKET handle;
		274	#endif
		275	} ANFD;
		276
		277	typedef struct
		278	{
		279	W w;
		280	int events;
		281	} ANPENDING;
		282
		283	#if EV_MULTIPLICITY
		284
		285	struct ev_loop
		286	{
		287	ev_tstamp ev_rt_now;
		288	#define ev_rt_now ((loop)->ev_rt_now)
		289	#define VAR(name,decl) decl;
		290	#include "ev_vars.h"
		291	#undef VAR
		292	};
		293	#include "ev_wrap.h"
		294
		295	static struct ev_loop default_loop_struct;
		296	struct ev_loop *ev_default_loop_ptr;
		297
		298	#else
		299
75	ev_tstamp ev_now;	300	ev_tstamp ev_rt_now;
76	int ev_method;	301	#define VAR(name,decl) static decl;
		302	#include "ev_vars.h"
		303	#undef VAR
77		304
78	static int have_monotonic; /* runtime */	305	static int ev_default_loop_ptr;
79		306
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	307	#endif
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		308
84	/*****************************************************************************/	309	/*****************************************************************************/
85		310
86	ev_tstamp	311	ev_tstamp
87	ev_time (void)	312	ev_time (void)
88	{	313	{
89	#if HAVE_REALTIME	314	#if EV_USE_REALTIME
90	struct timespec ts;	315	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	316	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	317	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	318	#else
94	struct timeval tv;	319	struct timeval tv;
95	gettimeofday (&tv, 0);	320	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	321	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	322	#endif
98	}	323	}
99		324
100	static ev_tstamp	325	inline ev_tstamp
101	get_clock (void)	326	get_clock (void)
102	{	327	{
103	#if HAVE_MONOTONIC	328	#if EV_USE_MONOTONIC
104	if (have_monotonic)	329	if (expect_true (have_monotonic))
105	{	330	{
106	struct timespec ts;	331	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	332	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	333	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	334	}
110	#endif	335	#endif
111		336
112	return ev_time ();	337	return ev_time ();
113	}	338	}
114		339
		340	#if EV_MULTIPLICITY
		341	ev_tstamp
		342	ev_now (EV_P)
		343	{
		344	return ev_rt_now;
		345	}
		346	#endif
		347
		348	#define array_roundsize(type,n) (((n) \| 4) & ~3)
		349
115	#define array_needsize(base,cur,cnt,init) \	350	#define array_needsize(type,base,cur,cnt,init) \
116	if ((cnt) > cur) \	351	if (expect_false ((cnt) > cur)) \
117	{ \	352	{ \
118	int newcnt = cur; \	353	int newcnt = cur; \
119	do \	354	do \
120	{ \	355	{ \
121	newcnt = (newcnt << 1) \| 4 & ~3; \	356	newcnt = array_roundsize (type, newcnt << 1); \
122	} \	357	} \
123	while ((cnt) > newcnt); \	358	while ((cnt) > newcnt); \
124	\	359	\
125	base = realloc (base, sizeof (base) (newcnt)); \	360	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
126	init (base + cur, newcnt - cur); \	361	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	362	cur = newcnt; \
128	}	363	}
		364
		365	#define array_slim(type,stem) \
		366	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		367	{ \
		368	stem ## max = array_roundsize (stem ## cnt >> 1); \
		369	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
		370	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		371	}
		372
		373	#define array_free(stem, idx) \
		374	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
129		375
130	/*****************************************************************************/	376	/*****************************************************************************/
131		377
132	typedef struct
133	{
134	struct ev_io *head;
135	unsigned char wev, rev; /* want, received event set */
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140
141	static int *fdchanges;
142	static int fdchangemax, fdchangecnt;
143
144	static void	378	static void
145	anfds_init (ANFD *base, int count)	379	anfds_init (ANFD *base, int count)
146	{	380	{
147	while (count--)	381	while (count--)
148	{	382	{
149	base->head = 0;	383	base->head = 0;
150	base->wev = base->rev = EV_NONE;	384	base->events = EV_NONE;
		385	base->reify = 0;
		386
151	++base;	387	++base;
152	}	388	}
153	}	389	}
154		390
155	typedef struct	391	void
		392	ev_feed_event (EV_P_ void *w, int revents)
156	{	393	{
157	W w;	394	W w_ = (W)w;
158	int events;
159	} ANPENDING;
160		395
161	static ANPENDING *pendings;	396	if (expect_false (w_->pending))
162	static int pendingmax, pendingcnt;
163
164	static void
165	event (W w, int events)
166	{
167	if (w->active)
168	{	397	{
169	w->pending = ++pendingcnt;
170	array_needsize (pendings, pendingmax, pendingcnt, );
171	pendings [pendingcnt - 1].w = w;
172	pendings [pendingcnt - 1].events = events;	398	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		399	return;
173	}	400	}
174	}
175		401
		402	if (expect_false (!w_->cb))
		403	return;
		404
		405	w_->pending = ++pendingcnt [ABSPRI (w_)];
		406	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		407	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		408	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		409	}
		410
176	static void	411	static void
		412	queue_events (EV_P_ W *events, int eventcnt, int type)
		413	{
		414	int i;
		415
		416	for (i = 0; i < eventcnt; ++i)
		417	ev_feed_event (EV_A_ events [i], type);
		418	}
		419
		420	inline void
177	fd_event (int fd, int events)	421	fd_event (EV_P_ int fd, int revents)
178	{	422	{
179	ANFD *anfd = anfds + fd;	423	ANFD *anfd = anfds + fd;
180	struct ev_io *w;	424	struct ev_io *w;
181		425
182	for (w = anfd->head; w; w = w->next)	426	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
183	{	427	{
184	int ev = w->events & events;	428	int ev = w->events & revents;
185		429
186	if (ev)	430	if (ev)
187	event ((W)w, ev);	431	ev_feed_event (EV_A_ (W)w, ev);
188	}	432	}
189	}	433	}
190		434
191	static void	435	void
192	queue_events (W *events, int eventcnt, int type)	436	ev_feed_fd_event (EV_P_ int fd, int revents)
		437	{
		438	fd_event (EV_A_ fd, revents);
		439	}
		440
		441	/*****************************************************************************/
		442
		443	inline void
		444	fd_reify (EV_P)
193	{	445	{
194	int i;	446	int i;
195		447
196	for (i = 0; i < eventcnt; ++i)	448	for (i = 0; i < fdchangecnt; ++i)
197	event (events [i], type);	449	{
		450	int fd = fdchanges [i];
		451	ANFD *anfd = anfds + fd;
		452	struct ev_io *w;
		453
		454	int events = 0;
		455
		456	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		457	events \|= w->events;
		458
		459	#if EV_SELECT_IS_WINSOCKET
		460	if (events)
		461	{
		462	unsigned long argp;
		463	anfd->handle = _get_osfhandle (fd);
		464	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		465	}
		466	#endif
		467
		468	anfd->reify = 0;
		469
		470	backend_modify (EV_A_ fd, anfd->events, events);
		471	anfd->events = events;
		472	}
		473
		474	fdchangecnt = 0;
		475	}
		476
		477	static void
		478	fd_change (EV_P_ int fd)
		479	{
		480	if (expect_false (anfds [fd].reify))
		481	return;
		482
		483	anfds [fd].reify = 1;
		484
		485	++fdchangecnt;
		486	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		487	fdchanges [fdchangecnt - 1] = fd;
		488	}
		489
		490	static void
		491	fd_kill (EV_P_ int fd)
		492	{
		493	struct ev_io *w;
		494
		495	while ((w = (struct ev_io *)anfds [fd].head))
		496	{
		497	ev_io_stop (EV_A_ w);
		498	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		499	}
		500	}
		501
		502	inline int
		503	fd_valid (int fd)
		504	{
		505	#ifdef _WIN32
		506	return _get_osfhandle (fd) != -1;
		507	#else
		508	return fcntl (fd, F_GETFD) != -1;
		509	#endif
198	}	510	}
199		511
200	/* called on EBADF to verify fds */	512	/* called on EBADF to verify fds */
201	static void	513	static void
202	fd_recheck ()	514	fd_ebadf (EV_P)
203	{	515	{
204	int fd;	516	int fd;
205		517
206	for (fd = 0; fd < anfdmax; ++fd)	518	for (fd = 0; fd < anfdmax; ++fd)
207	if (anfds [fd].wev)	519	if (anfds [fd].events)
208	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	520	if (!fd_valid (fd) == -1 && errno == EBADF)
209	while (anfds [fd].head)	521	fd_kill (EV_A_ fd);
210	evio_stop (anfds [fd].head);	522	}
		523
		524	/* called on ENOMEM in select/poll to kill some fds and retry */
		525	static void
		526	fd_enomem (EV_P)
		527	{
		528	int fd;
		529
		530	for (fd = anfdmax; fd--; )
		531	if (anfds [fd].events)
		532	{
		533	fd_kill (EV_A_ fd);
		534	return;
		535	}
		536	}
		537
		538	/* usually called after fork if backend needs to re-arm all fds from scratch */
		539	static void
		540	fd_rearm_all (EV_P)
		541	{
		542	int fd;
		543
		544	/* this should be highly optimised to not do anything but set a flag */
		545	for (fd = 0; fd < anfdmax; ++fd)
		546	if (anfds [fd].events)
		547	{
		548	anfds [fd].events = 0;
		549	fd_change (EV_A_ fd);
		550	}
211	}	551	}
212		552
213	/*****************************************************************************/	553	/*****************************************************************************/
214		554
215	static struct ev_timer **timers;
216	static int timermax, timercnt;
217
218	static struct ev_periodic **periodics;
219	static int periodicmax, periodiccnt;
220
221	static void	555	static void
222	upheap (WT *timers, int k)	556	upheap (WT *heap, int k)
223	{	557	{
224	WT w = timers [k];	558	WT w = heap [k];
225		559
226	while (k && timers [k >> 1]->at > w->at)	560	while (k && heap [k >> 1]->at > w->at)
227	{	561	{
228	timers [k] = timers [k >> 1];	562	heap [k] = heap [k >> 1];
229	timers [k]->active = k + 1;	563	((W)heap [k])->active = k + 1;
230	k >>= 1;	564	k >>= 1;
231	}	565	}
232		566
233	timers [k] = w;	567	heap [k] = w;
234	timers [k]->active = k + 1;	568	((W)heap [k])->active = k + 1;
235		569
236	}	570	}
237		571
238	static void	572	static void
239	downheap (WT *timers, int N, int k)	573	downheap (WT *heap, int N, int k)
240	{	574	{
241	WT w = timers [k];	575	WT w = heap [k];
242		576
243	while (k < (N >> 1))	577	while (k < (N >> 1))
244	{	578	{
245	int j = k << 1;	579	int j = k << 1;
246		580
247	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	581	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
248	++j;	582	++j;
249		583
250	if (w->at <= timers [j]->at)	584	if (w->at <= heap [j]->at)
251	break;	585	break;
252		586
253	timers [k] = timers [j];	587	heap [k] = heap [j];
254	timers [k]->active = k + 1;	588	((W)heap [k])->active = k + 1;
255	k = j;	589	k = j;
256	}	590	}
257		591
258	timers [k] = w;	592	heap [k] = w;
259	timers [k]->active = k + 1;	593	((W)heap [k])->active = k + 1;
		594	}
		595
		596	inline void
		597	adjustheap (WT *heap, int N, int k)
		598	{
		599	upheap (heap, k);
		600	downheap (heap, N, k);
260	}	601	}
261		602
262	/*****************************************************************************/	603	/*****************************************************************************/
263		604
264	typedef struct	605	typedef struct
265	{	606	{
266	struct ev_signal *head;	607	WL head;
267	sig_atomic_t gotsig;	608	sig_atomic_t volatile gotsig;
268	} ANSIG;	609	} ANSIG;
269		610
270	static ANSIG *signals;	611	static ANSIG *signals;
271	static int signalmax;	612	static int signalmax;
272		613
273	static int sigpipe [2];	614	static int sigpipe [2];
274	static sig_atomic_t gotsig;	615	static sig_atomic_t volatile gotsig;
275	static struct ev_io sigev;	616	static struct ev_io sigev;
276		617
277	static void	618	static void
278	signals_init (ANSIG *base, int count)	619	signals_init (ANSIG *base, int count)
279	{	620	{
280	while (count--)	621	while (count--)
281	{	622	{
282	base->head = 0;	623	base->head = 0;
283	base->gotsig = 0;	624	base->gotsig = 0;
		625
284	++base;	626	++base;
285	}	627	}
286	}	628	}
287		629
288	static void	630	static void
289	sighandler (int signum)	631	sighandler (int signum)
290	{	632	{
		633	#if _WIN32
		634	signal (signum, sighandler);
		635	#endif
		636
291	signals [signum - 1].gotsig = 1;	637	signals [signum - 1].gotsig = 1;
292		638
293	if (!gotsig)	639	if (!gotsig)
294	{	640	{
		641	int old_errno = errno;
295	gotsig = 1;	642	gotsig = 1;
296	write (sigpipe [1], &gotsig, 1);	643	write (sigpipe [1], &signum, 1);
		644	errno = old_errno;
297	}	645	}
298	}	646	}
299		647
		648	void
		649	ev_feed_signal_event (EV_P_ int signum)
		650	{
		651	WL w;
		652
		653	#if EV_MULTIPLICITY
		654	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		655	#endif
		656
		657	--signum;
		658
		659	if (signum < 0 \|\| signum >= signalmax)
		660	return;
		661
		662	signals [signum].gotsig = 0;
		663
		664	for (w = signals [signum].head; w; w = w->next)
		665	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		666	}
		667
300	static void	668	static void
301	sigcb (struct ev_io *iow, int revents)	669	sigcb (EV_P_ struct ev_io *iow, int revents)
302	{	670	{
303	struct ev_signal *w;
304	int sig;	671	int signum;
305		672
		673	read (sigpipe [0], &revents, 1);
306	gotsig = 0;	674	gotsig = 0;
307	read (sigpipe [0], &revents, 1);
308		675
309	for (sig = signalmax; sig--; )	676	for (signum = signalmax; signum--; )
310	if (signals [sig].gotsig)	677	if (signals [signum].gotsig)
311	{	678	ev_feed_signal_event (EV_A_ signum + 1);
312	signals [sig].gotsig = 0;
313
314	for (w = signals [sig].head; w; w = w->next)
315	event ((W)w, EV_SIGNAL);
316	}
317	}	679	}
318		680
319	static void	681	static void
320	siginit (void)	682	fd_intern (int fd)
321	{	683	{
		684	#ifdef _WIN32
		685	int arg = 1;
		686	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		687	#else
322	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	688	fcntl (fd, F_SETFD, FD_CLOEXEC);
323	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
324
325	/* rather than sort out wether we really need nb, set it */
326	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	689	fcntl (fd, F_SETFL, O_NONBLOCK);
327	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	690	#endif
		691	}
328		692
		693	static void
		694	siginit (EV_P)
		695	{
		696	fd_intern (sigpipe [0]);
		697	fd_intern (sigpipe [1]);
		698
329	evio_set (&sigev, sigpipe [0], EV_READ);	699	ev_io_set (&sigev, sigpipe [0], EV_READ);
330	evio_start (&sigev);	700	ev_io_start (EV_A_ &sigev);
		701	ev_unref (EV_A); /* child watcher should not keep loop alive */
331	}	702	}
332		703
333	/*****************************************************************************/	704	/*****************************************************************************/
334		705
335	static struct ev_idle **idles;
336	static int idlemax, idlecnt;
337
338	static struct ev_prepare **prepares;
339	static int preparemax, preparecnt;
340
341	static struct ev_check **checks;
342	static int checkmax, checkcnt;
343
344	/*****************************************************************************/
345
346	static struct ev_child *childs [PID_HASHSIZE];	706	static struct ev_child *childs [PID_HASHSIZE];
		707
		708	#ifndef _WIN32
		709
347	static struct ev_signal childev;	710	static struct ev_signal childev;
348		711
349	#ifndef WCONTINUED	712	#ifndef WCONTINUED
350	# define WCONTINUED 0	713	# define WCONTINUED 0
351	#endif	714	#endif
352		715
353	static void	716	static void
354	childcb (struct ev_signal *sw, int revents)	717	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
355	{	718	{
356	struct ev_child *w;	719	struct ev_child *w;
		720
		721	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		722	if (w->pid == pid \|\| !w->pid)
		723	{
		724	ev_priority (w) = ev_priority (sw); /* need to do it now */
		725	w->rpid = pid;
		726	w->rstatus = status;
		727	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		728	}
		729	}
		730
		731	static void
		732	childcb (EV_P_ struct ev_signal *sw, int revents)
		733	{
357	int pid, status;	734	int pid, status;
358		735
359	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	736	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
360	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	737	{
361	if (w->pid == pid \|\| w->pid == -1)	738	/* make sure we are called again until all childs have been reaped */
362	{	739	/* we need to do it this way so that the callback gets called before we continue */
363	w->status = status;	740	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
364	event ((W)w, EV_CHILD);	741
365	}	742	child_reap (EV_A_ sw, pid, pid, status);
		743	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		744	}
366	}	745	}
		746
		747	#endif
367		748
368	/*****************************************************************************/	749	/*****************************************************************************/
369		750
		751	#if EV_USE_PORT
		752	# include "ev_port.c"
		753	#endif
		754	#if EV_USE_KQUEUE
		755	# include "ev_kqueue.c"
		756	#endif
370	#if HAVE_EPOLL	757	#if EV_USE_EPOLL
371	# include "ev_epoll.c"	758	# include "ev_epoll.c"
372	#endif	759	#endif
		760	#if EV_USE_POLL
		761	# include "ev_poll.c"
		762	#endif
373	#if HAVE_SELECT	763	#if EV_USE_SELECT
374	# include "ev_select.c"	764	# include "ev_select.c"
375	#endif	765	#endif
376		766
377	int ev_init (int flags)	767	int
		768	ev_version_major (void)
378	{	769	{
379	if (!ev_method)	770	return EV_VERSION_MAJOR;
		771	}
		772
		773	int
		774	ev_version_minor (void)
		775	{
		776	return EV_VERSION_MINOR;
		777	}
		778
		779	/* return true if we are running with elevated privileges and should ignore env variables */
		780	static int
		781	enable_secure (void)
		782	{
		783	#ifdef _WIN32
		784	return 0;
		785	#else
		786	return getuid () != geteuid ()
		787	\|\| getgid () != getegid ();
		788	#endif
		789	}
		790
		791	unsigned int
		792	ev_supported_backends (void)
		793	{
		794	unsigned int flags = 0;
		795
		796	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
		797	if (EV_USE_KQUEUE) flags \|= EVBACKEND_KQUEUE;
		798	if (EV_USE_EPOLL ) flags \|= EVBACKEND_EPOLL;
		799	if (EV_USE_POLL ) flags \|= EVBACKEND_POLL;
		800	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
		801
		802	return flags;
		803	}
		804
		805	unsigned int
		806	ev_recommended_backends (void)
		807	{
		808	unsigned int flags = ev_supported_backends ();
		809
		810	#ifndef __NetBSD__
		811	/* kqueue is borked on everything but netbsd apparently */
		812	/* it usually doesn't work correctly on anything but sockets and pipes */
		813	flags &= ~EVBACKEND_KQUEUE;
		814	#endif
		815	#ifdef __APPLE__
		816	// flags &= ~EVBACKEND_KQUEUE; for documentation
		817	flags &= ~EVBACKEND_POLL;
		818	#endif
		819
		820	return flags;
		821	}
		822
		823	unsigned int
		824	ev_embeddable_backends (void)
		825	{
		826	return EVBACKEND_EPOLL
		827	\| EVBACKEND_KQUEUE
		828	\| EVBACKEND_PORT;
		829	}
		830
		831	unsigned int
		832	ev_backend (EV_P)
		833	{
		834	return backend;
		835	}
		836
		837	static void
		838	loop_init (EV_P_ unsigned int flags)
		839	{
		840	if (!backend)
380	{	841	{
381	#if HAVE_MONOTONIC	842	#if EV_USE_MONOTONIC
382	{	843	{
383	struct timespec ts;	844	struct timespec ts;
384	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	845	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
385	have_monotonic = 1;	846	have_monotonic = 1;
386	}	847	}
387	#endif	848	#endif
388		849
389	ev_now = ev_time ();	850	ev_rt_now = ev_time ();
390	now = get_clock ();	851	mn_now = get_clock ();
		852	now_floor = mn_now;
391	diff = ev_now - now;	853	rtmn_diff = ev_rt_now - mn_now;
392		854
		855	if (!(flags & EVFLAG_NOENV)
		856	&& !enable_secure ()
		857	&& getenv ("LIBEV_FLAGS"))
		858	flags = atoi (getenv ("LIBEV_FLAGS"));
		859
		860	if (!(flags & 0x0000ffffUL))
		861	flags \|= ev_recommended_backends ();
		862
		863	backend = 0;
		864	#if EV_USE_PORT
		865	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		866	#endif
		867	#if EV_USE_KQUEUE
		868	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		869	#endif
		870	#if EV_USE_EPOLL
		871	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		872	#endif
		873	#if EV_USE_POLL
		874	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		875	#endif
		876	#if EV_USE_SELECT
		877	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		878	#endif
		879
		880	ev_init (&sigev, sigcb);
		881	ev_set_priority (&sigev, EV_MAXPRI);
		882	}
		883	}
		884
		885	static void
		886	loop_destroy (EV_P)
		887	{
		888	int i;
		889
		890	#if EV_USE_PORT
		891	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		892	#endif
		893	#if EV_USE_KQUEUE
		894	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		895	#endif
		896	#if EV_USE_EPOLL
		897	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		898	#endif
		899	#if EV_USE_POLL
		900	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		901	#endif
		902	#if EV_USE_SELECT
		903	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		904	#endif
		905
		906	for (i = NUMPRI; i--; )
		907	array_free (pending, [i]);
		908
		909	/* have to use the microsoft-never-gets-it-right macro */
		910	array_free (fdchange, EMPTY0);
		911	array_free (timer, EMPTY0);
		912	#if EV_PERIODICS
		913	array_free (periodic, EMPTY0);
		914	#endif
		915	array_free (idle, EMPTY0);
		916	array_free (prepare, EMPTY0);
		917	array_free (check, EMPTY0);
		918
		919	backend = 0;
		920	}
		921
		922	static void
		923	loop_fork (EV_P)
		924	{
		925	#if EV_USE_PORT
		926	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		927	#endif
		928	#if EV_USE_KQUEUE
		929	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		930	#endif
		931	#if EV_USE_EPOLL
		932	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		933	#endif
		934
		935	if (ev_is_active (&sigev))
		936	{
		937	/* default loop */
		938
		939	ev_ref (EV_A);
		940	ev_io_stop (EV_A_ &sigev);
		941	close (sigpipe [0]);
		942	close (sigpipe [1]);
		943
		944	while (pipe (sigpipe))
		945	syserr ("(libev) error creating pipe");
		946
		947	siginit (EV_A);
		948	}
		949
		950	postfork = 0;
		951	}
		952
		953	#if EV_MULTIPLICITY
		954	struct ev_loop *
		955	ev_loop_new (unsigned int flags)
		956	{
		957	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		958
		959	memset (loop, 0, sizeof (struct ev_loop));
		960
		961	loop_init (EV_A_ flags);
		962
		963	if (ev_backend (EV_A))
		964	return loop;
		965
		966	return 0;
		967	}
		968
		969	void
		970	ev_loop_destroy (EV_P)
		971	{
		972	loop_destroy (EV_A);
		973	ev_free (loop);
		974	}
		975
		976	void
		977	ev_loop_fork (EV_P)
		978	{
		979	postfork = 1;
		980	}
		981
		982	#endif
		983
		984	#if EV_MULTIPLICITY
		985	struct ev_loop *
		986	ev_default_loop_init (unsigned int flags)
		987	#else
		988	int
		989	ev_default_loop (unsigned int flags)
		990	#endif
		991	{
		992	if (sigpipe [0] == sigpipe [1])
393	if (pipe (sigpipe))	993	if (pipe (sigpipe))
394	return 0;	994	return 0;
395		995
396	ev_method = EVMETHOD_NONE;	996	if (!ev_default_loop_ptr)
397	#if HAVE_EPOLL	997	{
398	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	998	#if EV_MULTIPLICITY
		999	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1000	#else
		1001	ev_default_loop_ptr = 1;
399	#endif	1002	#endif
400	#if HAVE_SELECT
401	if (ev_method == EVMETHOD_NONE) select_init (flags);
402	#endif
403		1003
404	if (ev_method)	1004	loop_init (EV_A_ flags);
		1005
		1006	if (ev_backend (EV_A))
405	{	1007	{
406	evw_init (&sigev, sigcb);
407	siginit ();	1008	siginit (EV_A);
408		1009
		1010	#ifndef _WIN32
409	evsignal_init (&childev, childcb, SIGCHLD);	1011	ev_signal_init (&childev, childcb, SIGCHLD);
		1012	ev_set_priority (&childev, EV_MAXPRI);
410	evsignal_start (&childev);	1013	ev_signal_start (EV_A_ &childev);
		1014	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1015	#endif
411	}	1016	}
		1017	else
		1018	ev_default_loop_ptr = 0;
412	}	1019	}
413		1020
414	return ev_method;	1021	return ev_default_loop_ptr;
		1022	}
		1023
		1024	void
		1025	ev_default_destroy (void)
		1026	{
		1027	#if EV_MULTIPLICITY
		1028	struct ev_loop *loop = ev_default_loop_ptr;
		1029	#endif
		1030
		1031	#ifndef _WIN32
		1032	ev_ref (EV_A); /* child watcher */
		1033	ev_signal_stop (EV_A_ &childev);
		1034	#endif
		1035
		1036	ev_ref (EV_A); /* signal watcher */
		1037	ev_io_stop (EV_A_ &sigev);
		1038
		1039	close (sigpipe [0]); sigpipe [0] = 0;
		1040	close (sigpipe [1]); sigpipe [1] = 0;
		1041
		1042	loop_destroy (EV_A);
		1043	}
		1044
		1045	void
		1046	ev_default_fork (void)
		1047	{
		1048	#if EV_MULTIPLICITY
		1049	struct ev_loop *loop = ev_default_loop_ptr;
		1050	#endif
		1051
		1052	if (backend)
		1053	postfork = 1;
415	}	1054	}
416		1055
417	/*****************************************************************************/	1056	/*****************************************************************************/
418		1057
419	void ev_prefork (void)
420	{
421	/* nop */
422	}
423
424	void ev_postfork_parent (void)
425	{
426	/* nop */
427	}
428
429	void ev_postfork_child (void)
430	{
431	#if HAVE_EPOLL
432	if (ev_method == EVMETHOD_EPOLL)
433	epoll_postfork_child ();
434	#endif
435
436	evio_stop (&sigev);
437	close (sigpipe [0]);
438	close (sigpipe [1]);
439	pipe (sigpipe);
440	siginit ();
441	}
442
443	/*****************************************************************************/
444
445	static void	1058	static int
446	fd_reify (void)	1059	any_pending (EV_P)
447	{	1060	{
448	int i;	1061	int pri;
449		1062
450	for (i = 0; i < fdchangecnt; ++i)	1063	for (pri = NUMPRI; pri--; )
		1064	if (pendingcnt [pri])
		1065	return 1;
		1066
		1067	return 0;
		1068	}
		1069
		1070	inline void
		1071	call_pending (EV_P)
		1072	{
		1073	int pri;
		1074
		1075	for (pri = NUMPRI; pri--; )
		1076	while (pendingcnt [pri])
451	{	1077	{
452	int fd = fdchanges [i];	1078	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
453	ANFD *anfd = anfds + fd;
454	struct ev_io *w;
455		1079
456	int wev = 0;	1080	if (expect_true (p->w))
457
458	for (w = anfd->head; w; w = w->next)
459	wev \|= w->events;
460
461	if (anfd->wev != wev)
462	{	1081	{
463	method_modify (fd, anfd->wev, wev);
464	anfd->wev = wev;
465	}
466	}
467
468	fdchangecnt = 0;
469	}
470
471	static void
472	call_pending ()
473	{
474	while (pendingcnt)
475	{
476	ANPENDING *p = pendings + --pendingcnt;
477
478	if (p->w)
479	{
480	p->w->pending = 0;	1082	p->w->pending = 0;
481	p->w->cb (p->w, p->events);	1083	EV_CB_INVOKE (p->w, p->events);
482	}	1084	}
483	}	1085	}
484	}	1086	}
485		1087
486	static void	1088	inline void
487	timers_reify ()	1089	timers_reify (EV_P)
488	{	1090	{
489	while (timercnt && timers [0]->at <= now)	1091	while (timercnt && ((WT)timers [0])->at <= mn_now)
490	{	1092	{
491	struct ev_timer *w = timers [0];	1093	struct ev_timer *w = timers [0];
492		1094
493	event ((W)w, EV_TIMEOUT);	1095	assert (("inactive timer on timer heap detected", ev_is_active (w)));
494		1096
495	/* first reschedule or stop timer */	1097	/* first reschedule or stop timer */
496	if (w->repeat)	1098	if (w->repeat)
497	{	1099	{
		1100	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1101
498	w->at = now + w->repeat;	1102	((WT)w)->at += w->repeat;
499	assert (("timer timeout in the past, negative repeat?", w->at > now));	1103	if (((WT)w)->at < mn_now)
		1104	((WT)w)->at = mn_now;
		1105
500	downheap ((WT *)timers, timercnt, 0);	1106	downheap ((WT *)timers, timercnt, 0);
501	}	1107	}
502	else	1108	else
503	evtimer_stop (w); /* nonrepeating: stop timer */	1109	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
504	}
505	}
506		1110
507	static void	1111	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1112	}
		1113	}
		1114
		1115	#if EV_PERIODICS
		1116	inline void
508	periodics_reify ()	1117	periodics_reify (EV_P)
509	{	1118	{
510	while (periodiccnt && periodics [0]->at <= ev_now)	1119	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
511	{	1120	{
512	struct ev_periodic *w = periodics [0];	1121	struct ev_periodic *w = periodics [0];
513		1122
		1123	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1124
514	/* first reschedule or stop timer */	1125	/* first reschedule or stop timer */
515	if (w->interval)	1126	if (w->reschedule_cb)
516	{	1127	{
		1128	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1129	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1130	downheap ((WT *)periodics, periodiccnt, 0);
		1131	}
		1132	else if (w->interval)
		1133	{
517	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1134	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
518	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1135	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
519	downheap ((WT *)periodics, periodiccnt, 0);	1136	downheap ((WT *)periodics, periodiccnt, 0);
520	}	1137	}
521	else	1138	else
522	evperiodic_stop (w); /* nonrepeating: stop timer */	1139	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
523		1140
524	event ((W)w, EV_TIMEOUT);	1141	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
525	}	1142	}
526	}	1143	}
527		1144
528	static void	1145	static void
529	periodics_reschedule (ev_tstamp diff)	1146	periodics_reschedule (EV_P)
530	{	1147	{
531	int i;	1148	int i;
532		1149
533	/* adjust periodics after time jump */	1150	/* adjust periodics after time jump */
534	for (i = 0; i < periodiccnt; ++i)	1151	for (i = 0; i < periodiccnt; ++i)
535	{	1152	{
536	struct ev_periodic *w = periodics [i];	1153	struct ev_periodic *w = periodics [i];
537		1154
		1155	if (w->reschedule_cb)
		1156	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
538	if (w->interval)	1157	else if (w->interval)
		1158	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1159	}
		1160
		1161	/* now rebuild the heap */
		1162	for (i = periodiccnt >> 1; i--; )
		1163	downheap ((WT *)periodics, periodiccnt, i);
		1164	}
		1165	#endif
		1166
		1167	inline int
		1168	time_update_monotonic (EV_P)
		1169	{
		1170	mn_now = get_clock ();
		1171
		1172	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1173	{
		1174	ev_rt_now = rtmn_diff + mn_now;
		1175	return 0;
		1176	}
		1177	else
		1178	{
		1179	now_floor = mn_now;
		1180	ev_rt_now = ev_time ();
		1181	return 1;
		1182	}
		1183	}
		1184
		1185	inline void
		1186	time_update (EV_P)
		1187	{
		1188	int i;
		1189
		1190	#if EV_USE_MONOTONIC
		1191	if (expect_true (have_monotonic))
		1192	{
		1193	if (time_update_monotonic (EV_A))
539	{	1194	{
540	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1195	ev_tstamp odiff = rtmn_diff;
541		1196
542	if (fabs (diff) >= 1e-4)	1197	for (i = 4; --i; ) /* loop a few times, before making important decisions */
543	{	1198	{
544	evperiodic_stop (w);	1199	rtmn_diff = ev_rt_now - mn_now;
545	evperiodic_start (w);
546		1200
547	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1201	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1202	return; /* all is well */
		1203
		1204	ev_rt_now = ev_time ();
		1205	mn_now = get_clock ();
		1206	now_floor = mn_now;
548	}	1207	}
		1208
		1209	# if EV_PERIODICS
		1210	periodics_reschedule (EV_A);
		1211	# endif
		1212	/* no timer adjustment, as the monotonic clock doesn't jump */
		1213	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
549	}	1214	}
550	}	1215	}
551	}	1216	else
552		1217	#endif
553	static void	1218	{
554	time_update ()
555	{
556	int i;
557
558	ev_now = ev_time ();	1219	ev_rt_now = ev_time ();
559		1220
560	if (have_monotonic)	1221	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
561	{
562	ev_tstamp odiff = diff;
563
564	for (i = 4; --i; ) /* loop a few times, before making important decisions */
565	{	1222	{
566	now = get_clock ();	1223	#if EV_PERIODICS
567	diff = ev_now - now;
568
569	if (fabs (odiff - diff) < MIN_TIMEJUMP)
570	return; /* all is well */
571
572	ev_now = ev_time ();
573	}
574
575	periodics_reschedule (diff - odiff);
576	/* no timer adjustment, as the monotonic clock doesn't jump */
577	}
578	else
579	{
580	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
581	{
582	periodics_reschedule (ev_now - now);	1224	periodics_reschedule (EV_A);
		1225	#endif
583		1226
584	/* adjust timers. this is easy, as the offset is the same for all */	1227	/* adjust timers. this is easy, as the offset is the same for all */
585	for (i = 0; i < timercnt; ++i)	1228	for (i = 0; i < timercnt; ++i)
586	timers [i]->at += diff;	1229	((WT)timers [i])->at += ev_rt_now - mn_now;
587	}	1230	}
588		1231
589	now = ev_now;	1232	mn_now = ev_rt_now;
590	}	1233	}
591	}	1234	}
592		1235
593	int ev_loop_done;	1236	void
		1237	ev_ref (EV_P)
		1238	{
		1239	++activecnt;
		1240	}
594		1241
		1242	void
		1243	ev_unref (EV_P)
		1244	{
		1245	--activecnt;
		1246	}
		1247
		1248	static int loop_done;
		1249
		1250	void
595	void ev_loop (int flags)	1251	ev_loop (EV_P_ int flags)
596	{	1252	{
597	double block;	1253	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)
598	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1254	? EVUNLOOP_ONE
		1255	: EVUNLOOP_CANCEL;
599		1256
600	do	1257	while (activecnt)
601	{	1258	{
602	/* queue check watchers (and execute them) */	1259	/* queue check watchers (and execute them) */
603	if (preparecnt)	1260	if (expect_false (preparecnt))
604	{	1261	{
605	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1262	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
606	call_pending ();	1263	call_pending (EV_A);
607	}	1264	}
608		1265
		1266	/* we might have forked, so reify kernel state if necessary */
		1267	if (expect_false (postfork))
		1268	loop_fork (EV_A);
		1269
609	/* update fd-related kernel structures */	1270	/* update fd-related kernel structures */
610	fd_reify ();	1271	fd_reify (EV_A);
611		1272
612	/* calculate blocking time */	1273	/* calculate blocking time */
		1274	{
		1275	double block;
613		1276
614	/* we only need this for !monotonic clockor timers, but as we basically
615	always have timers, we just calculate it always */
616	ev_now = ev_time ();
617
618	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1277	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
619	block = 0.;	1278	block = 0.; /* do not block at all */
620	else	1279	else
621	{	1280	{
		1281	/* update time to cancel out callback processing overhead */
		1282	#if EV_USE_MONOTONIC
		1283	if (expect_true (have_monotonic))
		1284	time_update_monotonic (EV_A);
		1285	else
		1286	#endif
		1287	{
		1288	ev_rt_now = ev_time ();
		1289	mn_now = ev_rt_now;
		1290	}
		1291
622	block = MAX_BLOCKTIME;	1292	block = MAX_BLOCKTIME;
623		1293
624	if (timercnt)	1294	if (timercnt)
625	{	1295	{
626	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1296	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
627	if (block > to) block = to;	1297	if (block > to) block = to;
628	}	1298	}
629		1299
		1300	#if EV_PERIODICS
630	if (periodiccnt)	1301	if (periodiccnt)
631	{	1302	{
632	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1303	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
633	if (block > to) block = to;	1304	if (block > to) block = to;
634	}	1305	}
		1306	#endif
635		1307
636	if (block < 0.) block = 0.;	1308	if (expect_false (block < 0.)) block = 0.;
637	}	1309	}
638		1310
639	method_poll (block);	1311	backend_poll (EV_A_ block);
		1312	}
640		1313
641	/* update ev_now, do magic */	1314	/* update ev_rt_now, do magic */
642	time_update ();	1315	time_update (EV_A);
643		1316
644	/* queue pending timers and reschedule them */	1317	/* queue pending timers and reschedule them */
645	timers_reify (); /* relative timers called last */	1318	timers_reify (EV_A); /* relative timers called last */
		1319	#if EV_PERIODICS
646	periodics_reify (); /* absolute timers called first */	1320	periodics_reify (EV_A); /* absolute timers called first */
		1321	#endif
647		1322
648	/* queue idle watchers unless io or timers are pending */	1323	/* queue idle watchers unless io or timers are pending */
649	if (!pendingcnt)	1324	if (idlecnt && !any_pending (EV_A))
650	queue_events ((W *)idles, idlecnt, EV_IDLE);	1325	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
651		1326
652	/* queue check watchers, to be executed first */	1327	/* queue check watchers, to be executed first */
653	if (checkcnt)	1328	if (expect_false (checkcnt))
654	queue_events ((W *)checks, checkcnt, EV_CHECK);	1329	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
655		1330
656	call_pending ();	1331	call_pending (EV_A);
657	}
658	while (!ev_loop_done);
659		1332
660	if (ev_loop_done != 2)	1333	if (expect_false (loop_done))
		1334	break;
		1335	}
		1336
		1337	if (loop_done == EVUNLOOP_ONE)
		1338	loop_done = EVUNLOOP_CANCEL;
		1339	}
		1340
		1341	void
		1342	ev_unloop (EV_P_ int how)
		1343	{
661	ev_loop_done = 0;	1344	loop_done = how;
662	}	1345	}
663		1346
664	/*****************************************************************************/	1347	/*****************************************************************************/
665		1348
666	static void	1349	inline void
667	wlist_add (WL *head, WL elem)	1350	wlist_add (WL *head, WL elem)
668	{	1351	{
669	elem->next = *head;	1352	elem->next = *head;
670	*head = elem;	1353	*head = elem;
671	}	1354	}
672		1355
673	static void	1356	inline void
674	wlist_del (WL *head, WL elem)	1357	wlist_del (WL *head, WL elem)
675	{	1358	{
676	while (*head)	1359	while (*head)
677	{	1360	{
678	if (*head == elem)	1361	if (*head == elem)
…		…
683		1366
684	head = &(*head)->next;	1367	head = &(*head)->next;
685	}	1368	}
686	}	1369	}
687		1370
688	static void	1371	inline void
689	ev_clear (W w)	1372	ev_clear_pending (EV_P_ W w)
690	{	1373	{
691	if (w->pending)	1374	if (w->pending)
692	{	1375	{
693	pendings [w->pending - 1].w = 0;	1376	pendings [ABSPRI (w)][w->pending - 1].w = 0;
694	w->pending = 0;	1377	w->pending = 0;
695	}	1378	}
696	}	1379	}
697		1380
698	static void	1381	inline void
699	ev_start (W w, int active)	1382	ev_start (EV_P_ W w, int active)
700	{	1383	{
		1384	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1385	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1386
701	w->active = active;	1387	w->active = active;
		1388	ev_ref (EV_A);
702	}	1389	}
703		1390
704	static void	1391	inline void
705	ev_stop (W w)	1392	ev_stop (EV_P_ W w)
706	{	1393	{
		1394	ev_unref (EV_A);
707	w->active = 0;	1395	w->active = 0;
708	}	1396	}
709		1397
710	/*****************************************************************************/	1398	/*****************************************************************************/
711		1399
712	void	1400	void
713	evio_start (struct ev_io *w)	1401	ev_io_start (EV_P_ struct ev_io *w)
714	{	1402	{
715	if (ev_is_active (w))
716	return;
717
718	int fd = w->fd;	1403	int fd = w->fd;
719		1404
		1405	if (expect_false (ev_is_active (w)))
		1406	return;
		1407
		1408	assert (("ev_io_start called with negative fd", fd >= 0));
		1409
720	ev_start ((W)w, 1);	1410	ev_start (EV_A_ (W)w, 1);
721	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1411	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
722	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1412	wlist_add ((WL *)&anfds[fd].head, (WL)w);
723		1413
724	++fdchangecnt;	1414	fd_change (EV_A_ fd);
725	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
726	fdchanges [fdchangecnt - 1] = fd;
727	}	1415	}
728		1416
729	void	1417	void
730	evio_stop (struct ev_io *w)	1418	ev_io_stop (EV_P_ struct ev_io *w)
731	{	1419	{
732	ev_clear ((W)w);	1420	ev_clear_pending (EV_A_ (W)w);
733	if (!ev_is_active (w))	1421	if (expect_false (!ev_is_active (w)))
734	return;	1422	return;
		1423
		1424	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
735		1425
736	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1426	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
737	ev_stop ((W)w);	1427	ev_stop (EV_A_ (W)w);
738		1428
739	++fdchangecnt;	1429	fd_change (EV_A_ w->fd);
740	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
741	fdchanges [fdchangecnt - 1] = w->fd;
742	}	1430	}
743		1431
744	void	1432	void
745	evtimer_start (struct ev_timer *w)	1433	ev_timer_start (EV_P_ struct ev_timer *w)
746	{	1434	{
747	if (ev_is_active (w))	1435	if (expect_false (ev_is_active (w)))
748	return;	1436	return;
749		1437
750	w->at += now;	1438	((WT)w)->at += mn_now;
751		1439
752	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1440	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
753		1441
754	ev_start ((W)w, ++timercnt);	1442	ev_start (EV_A_ (W)w, ++timercnt);
755	array_needsize (timers, timermax, timercnt, );	1443	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
756	timers [timercnt - 1] = w;	1444	timers [timercnt - 1] = w;
757	upheap ((WT *)timers, timercnt - 1);	1445	upheap ((WT *)timers, timercnt - 1);
758	}
759		1446
		1447	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1448	}
		1449
760	void	1450	void
761	evtimer_stop (struct ev_timer *w)	1451	ev_timer_stop (EV_P_ struct ev_timer *w)
762	{	1452	{
763	ev_clear ((W)w);	1453	ev_clear_pending (EV_A_ (W)w);
764	if (!ev_is_active (w))	1454	if (expect_false (!ev_is_active (w)))
765	return;	1455	return;
766		1456
		1457	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1458
767	if (w->active < timercnt--)	1459	if (expect_true (((W)w)->active < timercnt--))
768	{	1460	{
769	timers [w->active - 1] = timers [timercnt];	1461	timers [((W)w)->active - 1] = timers [timercnt];
770	downheap ((WT *)timers, timercnt, w->active - 1);	1462	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
771	}	1463	}
772		1464
773	w->at = w->repeat;	1465	((WT)w)->at -= mn_now;
774		1466
775	ev_stop ((W)w);	1467	ev_stop (EV_A_ (W)w);
776	}	1468	}
777		1469
778	void	1470	void
779	evtimer_again (struct ev_timer *w)	1471	ev_timer_again (EV_P_ struct ev_timer *w)
780	{	1472	{
781	if (ev_is_active (w))	1473	if (ev_is_active (w))
782	{	1474	{
783	if (w->repeat)	1475	if (w->repeat)
784	{	1476	{
785	w->at = now + w->repeat;	1477	((WT)w)->at = mn_now + w->repeat;
786	downheap ((WT *)timers, timercnt, w->active - 1);	1478	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
787	}	1479	}
788	else	1480	else
789	evtimer_stop (w);	1481	ev_timer_stop (EV_A_ w);
790	}	1482	}
791	else if (w->repeat)	1483	else if (w->repeat)
		1484	{
		1485	w->at = w->repeat;
792	evtimer_start (w);	1486	ev_timer_start (EV_A_ w);
		1487	}
793	}	1488	}
794		1489
		1490	#if EV_PERIODICS
795	void	1491	void
796	evperiodic_start (struct ev_periodic *w)	1492	ev_periodic_start (EV_P_ struct ev_periodic *w)
797	{	1493	{
798	if (ev_is_active (w))	1494	if (expect_false (ev_is_active (w)))
799	return;	1495	return;
800		1496
801	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1497	if (w->reschedule_cb)
802		1498	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1499	else if (w->interval)
		1500	{
		1501	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
803	/* this formula differs from the one in periodic_reify because we do not always round up */	1502	/* this formula differs from the one in periodic_reify because we do not always round up */
804	if (w->interval)
805	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1503	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1504	}
806		1505
807	ev_start ((W)w, ++periodiccnt);	1506	ev_start (EV_A_ (W)w, ++periodiccnt);
808	array_needsize (periodics, periodicmax, periodiccnt, );	1507	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
809	periodics [periodiccnt - 1] = w;	1508	periodics [periodiccnt - 1] = w;
810	upheap ((WT *)periodics, periodiccnt - 1);	1509	upheap ((WT *)periodics, periodiccnt - 1);
811	}
812		1510
		1511	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1512	}
		1513
813	void	1514	void
814	evperiodic_stop (struct ev_periodic *w)	1515	ev_periodic_stop (EV_P_ struct ev_periodic *w)
815	{	1516	{
816	ev_clear ((W)w);	1517	ev_clear_pending (EV_A_ (W)w);
817	if (!ev_is_active (w))	1518	if (expect_false (!ev_is_active (w)))
818	return;	1519	return;
819		1520
		1521	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1522
820	if (w->active < periodiccnt--)	1523	if (expect_true (((W)w)->active < periodiccnt--))
821	{	1524	{
822	periodics [w->active - 1] = periodics [periodiccnt];	1525	periodics [((W)w)->active - 1] = periodics [periodiccnt];
823	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1526	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
824	}	1527	}
825		1528
826	ev_stop ((W)w);	1529	ev_stop (EV_A_ (W)w);
827	}	1530	}
828		1531
829	void	1532	void
		1533	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1534	{
		1535	/* TODO: use adjustheap and recalculation */
		1536	ev_periodic_stop (EV_A_ w);
		1537	ev_periodic_start (EV_A_ w);
		1538	}
		1539	#endif
		1540
		1541	void
		1542	ev_idle_start (EV_P_ struct ev_idle *w)
		1543	{
		1544	if (expect_false (ev_is_active (w)))
		1545	return;
		1546
		1547	ev_start (EV_A_ (W)w, ++idlecnt);
		1548	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1549	idles [idlecnt - 1] = w;
		1550	}
		1551
		1552	void
		1553	ev_idle_stop (EV_P_ struct ev_idle *w)
		1554	{
		1555	ev_clear_pending (EV_A_ (W)w);
		1556	if (expect_false (!ev_is_active (w)))
		1557	return;
		1558
		1559	idles [((W)w)->active - 1] = idles [--idlecnt];
		1560	ev_stop (EV_A_ (W)w);
		1561	}
		1562
		1563	void
		1564	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1565	{
		1566	if (expect_false (ev_is_active (w)))
		1567	return;
		1568
		1569	ev_start (EV_A_ (W)w, ++preparecnt);
		1570	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1571	prepares [preparecnt - 1] = w;
		1572	}
		1573
		1574	void
		1575	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1576	{
		1577	ev_clear_pending (EV_A_ (W)w);
		1578	if (expect_false (!ev_is_active (w)))
		1579	return;
		1580
		1581	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1582	ev_stop (EV_A_ (W)w);
		1583	}
		1584
		1585	void
		1586	ev_check_start (EV_P_ struct ev_check *w)
		1587	{
		1588	if (expect_false (ev_is_active (w)))
		1589	return;
		1590
		1591	ev_start (EV_A_ (W)w, ++checkcnt);
		1592	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1593	checks [checkcnt - 1] = w;
		1594	}
		1595
		1596	void
		1597	ev_check_stop (EV_P_ struct ev_check *w)
		1598	{
		1599	ev_clear_pending (EV_A_ (W)w);
		1600	if (expect_false (!ev_is_active (w)))
		1601	return;
		1602
		1603	checks [((W)w)->active - 1] = checks [--checkcnt];
		1604	ev_stop (EV_A_ (W)w);
		1605	}
		1606
		1607	#ifndef SA_RESTART
		1608	# define SA_RESTART 0
		1609	#endif
		1610
		1611	void
830	evsignal_start (struct ev_signal *w)	1612	ev_signal_start (EV_P_ struct ev_signal *w)
831	{	1613	{
		1614	#if EV_MULTIPLICITY
		1615	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1616	#endif
832	if (ev_is_active (w))	1617	if (expect_false (ev_is_active (w)))
833	return;	1618	return;
834		1619
		1620	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1621
835	ev_start ((W)w, 1);	1622	ev_start (EV_A_ (W)w, 1);
836	array_needsize (signals, signalmax, w->signum, signals_init);	1623	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
837	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1624	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
838		1625
839	if (!w->next)	1626	if (!((WL)w)->next)
840	{	1627	{
		1628	#if _WIN32
		1629	signal (w->signum, sighandler);
		1630	#else
841	struct sigaction sa;	1631	struct sigaction sa;
842	sa.sa_handler = sighandler;	1632	sa.sa_handler = sighandler;
843	sigfillset (&sa.sa_mask);	1633	sigfillset (&sa.sa_mask);
844	sa.sa_flags = 0;	1634	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
845	sigaction (w->signum, &sa, 0);	1635	sigaction (w->signum, &sa, 0);
		1636	#endif
846	}	1637	}
847	}	1638	}
848		1639
849	void	1640	void
850	evsignal_stop (struct ev_signal *w)	1641	ev_signal_stop (EV_P_ struct ev_signal *w)
851	{	1642	{
852	ev_clear ((W)w);	1643	ev_clear_pending (EV_A_ (W)w);
853	if (!ev_is_active (w))	1644	if (expect_false (!ev_is_active (w)))
854	return;	1645	return;
855		1646
856	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1647	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
857	ev_stop ((W)w);	1648	ev_stop (EV_A_ (W)w);
858		1649
859	if (!signals [w->signum - 1].head)	1650	if (!signals [w->signum - 1].head)
860	signal (w->signum, SIG_DFL);	1651	signal (w->signum, SIG_DFL);
861	}	1652	}
862		1653
863	void evidle_start (struct ev_idle *w)	1654	void
864	{
865	if (ev_is_active (w))
866	return;
867
868	ev_start ((W)w, ++idlecnt);
869	array_needsize (idles, idlemax, idlecnt, );
870	idles [idlecnt - 1] = w;
871	}
872
873	void evidle_stop (struct ev_idle *w)
874	{
875	ev_clear ((W)w);
876	if (ev_is_active (w))
877	return;
878
879	idles [w->active - 1] = idles [--idlecnt];
880	ev_stop ((W)w);
881	}
882
883	void evprepare_start (struct ev_prepare *w)
884	{
885	if (ev_is_active (w))
886	return;
887
888	ev_start ((W)w, ++preparecnt);
889	array_needsize (prepares, preparemax, preparecnt, );
890	prepares [preparecnt - 1] = w;
891	}
892
893	void evprepare_stop (struct ev_prepare *w)
894	{
895	ev_clear ((W)w);
896	if (ev_is_active (w))
897	return;
898
899	prepares [w->active - 1] = prepares [--preparecnt];
900	ev_stop ((W)w);
901	}
902
903	void evcheck_start (struct ev_check *w)
904	{
905	if (ev_is_active (w))
906	return;
907
908	ev_start ((W)w, ++checkcnt);
909	array_needsize (checks, checkmax, checkcnt, );
910	checks [checkcnt - 1] = w;
911	}
912
913	void evcheck_stop (struct ev_check *w)
914	{
915	ev_clear ((W)w);
916	if (ev_is_active (w))
917	return;
918
919	checks [w->active - 1] = checks [--checkcnt];
920	ev_stop ((W)w);
921	}
922
923	void evchild_start (struct ev_child *w)	1655	ev_child_start (EV_P_ struct ev_child *w)
924	{	1656	{
		1657	#if EV_MULTIPLICITY
		1658	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1659	#endif
925	if (ev_is_active (w))	1660	if (expect_false (ev_is_active (w)))
926	return;	1661	return;
927		1662
928	ev_start ((W)w, 1);	1663	ev_start (EV_A_ (W)w, 1);
929	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1664	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
930	}	1665	}
931		1666
		1667	void
932	void evchild_stop (struct ev_child *w)	1668	ev_child_stop (EV_P_ struct ev_child *w)
933	{	1669	{
934	ev_clear ((W)w);	1670	ev_clear_pending (EV_A_ (W)w);
935	if (ev_is_active (w))	1671	if (expect_false (!ev_is_active (w)))
936	return;	1672	return;
937		1673
938	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1674	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
939	ev_stop ((W)w);	1675	ev_stop (EV_A_ (W)w);
940	}	1676	}
		1677
		1678	#if EV_MULTIPLICITY
		1679	static void
		1680	embed_cb (EV_P_ struct ev_io *io, int revents)
		1681	{
		1682	struct ev_embed w = (struct ev_embed )(((char *)io) - offsetof (struct ev_embed, io));
		1683
		1684	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		1685	ev_loop (w->loop, EVLOOP_NONBLOCK);
		1686	}
		1687
		1688	void
		1689	ev_embed_start (EV_P_ struct ev_embed *w)
		1690	{
		1691	if (expect_false (ev_is_active (w)))
		1692	return;
		1693
		1694	{
		1695	struct ev_loop *loop = w->loop;
		1696	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		1697	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		1698	}
		1699
		1700	ev_io_start (EV_A_ &w->io);
		1701	ev_start (EV_A_ (W)w, 1);
		1702	}
		1703
		1704	void
		1705	ev_embed_stop (EV_P_ struct ev_embed *w)
		1706	{
		1707	ev_clear_pending (EV_A_ (W)w);
		1708	if (expect_false (!ev_is_active (w)))
		1709	return;
		1710
		1711	ev_io_stop (EV_A_ &w->io);
		1712	ev_stop (EV_A_ (W)w);
		1713	}
		1714	#endif
941		1715
942	/*****************************************************************************/	1716	/*****************************************************************************/
943		1717
944	struct ev_once	1718	struct ev_once
945	{	1719	{
…		…
948	void (cb)(int revents, void arg);	1722	void (cb)(int revents, void arg);
949	void *arg;	1723	void *arg;
950	};	1724	};
951		1725
952	static void	1726	static void
953	once_cb (struct ev_once *once, int revents)	1727	once_cb (EV_P_ struct ev_once *once, int revents)
954	{	1728	{
955	void (cb)(int revents, void arg) = once->cb;	1729	void (cb)(int revents, void arg) = once->cb;
956	void *arg = once->arg;	1730	void *arg = once->arg;
957		1731
958	evio_stop (&once->io);	1732	ev_io_stop (EV_A_ &once->io);
959	evtimer_stop (&once->to);	1733	ev_timer_stop (EV_A_ &once->to);
960	free (once);	1734	ev_free (once);
961		1735
962	cb (revents, arg);	1736	cb (revents, arg);
963	}	1737	}
964		1738
965	static void	1739	static void
966	once_cb_io (struct ev_io *w, int revents)	1740	once_cb_io (EV_P_ struct ev_io *w, int revents)
967	{	1741	{
968	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1742	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
969	}	1743	}
970		1744
971	static void	1745	static void
972	once_cb_to (struct ev_timer *w, int revents)	1746	once_cb_to (EV_P_ struct ev_timer *w, int revents)
973	{	1747	{
974	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1748	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
975	}	1749	}
976		1750
977	void	1751	void
978	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1752	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
979	{	1753	{
980	struct ev_once *once = malloc (sizeof (struct ev_once));	1754	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
981		1755
982	if (!once)	1756	if (expect_false (!once))
983	cb (EV_ERROR, arg);	1757	{
984	else	1758	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1759	return;
985	{	1760	}
		1761
986	once->cb = cb;	1762	once->cb = cb;
987	once->arg = arg;	1763	once->arg = arg;
988		1764
989	evw_init (&once->io, once_cb_io);	1765	ev_init (&once->io, once_cb_io);
990
991	if (fd >= 0)	1766	if (fd >= 0)
992	{	1767	{
993	evio_set (&once->io, fd, events);	1768	ev_io_set (&once->io, fd, events);
994	evio_start (&once->io);	1769	ev_io_start (EV_A_ &once->io);
995	}	1770	}
996		1771
997	evw_init (&once->to, once_cb_to);	1772	ev_init (&once->to, once_cb_to);
998
999	if (timeout >= 0.)	1773	if (timeout >= 0.)
1000	{	1774	{
1001	evtimer_set (&once->to, timeout, 0.);	1775	ev_timer_set (&once->to, timeout, 0.);
1002	evtimer_start (&once->to);	1776	ev_timer_start (EV_A_ &once->to);
1003	}
1004	}
1005	}
1006
1007	/*****************************************************************************/
1008
1009	#if 0
1010
1011	struct ev_io wio;
1012
1013	static void
1014	sin_cb (struct ev_io *w, int revents)
1015	{
1016	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1017	}
1018
1019	static void
1020	ocb (struct ev_timer *w, int revents)
1021	{
1022	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1023	evtimer_stop (w);
1024	evtimer_start (w);
1025	}
1026
1027	static void
1028	scb (struct ev_signal *w, int revents)
1029	{
1030	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1031	evio_stop (&wio);
1032	evio_start (&wio);
1033	}
1034
1035	static void
1036	gcb (struct ev_signal *w, int revents)
1037	{
1038	fprintf (stderr, "generic %x\n", revents);
1039
1040	}
1041
1042	int main (void)
1043	{
1044	ev_init (0);
1045
1046	evio_init (&wio, sin_cb, 0, EV_READ);
1047	evio_start (&wio);
1048
1049	struct ev_timer t[10000];
1050
1051	#if 0
1052	int i;
1053	for (i = 0; i < 10000; ++i)
1054	{	1777	}
1055	struct ev_timer *w = t + i;
1056	evw_init (w, ocb, i);
1057	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1058	evtimer_start (w);
1059	if (drand48 () < 0.5)
1060	evtimer_stop (w);
1061	}
1062	#endif
1063
1064	struct ev_timer t1;
1065	evtimer_init (&t1, ocb, 5, 10);
1066	evtimer_start (&t1);
1067
1068	struct ev_signal sig;
1069	evsignal_init (&sig, scb, SIGQUIT);
1070	evsignal_start (&sig);
1071
1072	struct ev_check cw;
1073	evcheck_init (&cw, gcb);
1074	evcheck_start (&cw);
1075
1076	struct ev_idle iw;
1077	evidle_init (&iw, gcb);
1078	evidle_start (&iw);
1079
1080	ev_loop (0);
1081
1082	return 0;
1083	}	1778	}
1084		1779
		1780	#ifdef __cplusplus
		1781	}
1085	#endif	1782	#endif
1086		1783
1087
1088
1089

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Comparing libev/ev.c (file contents): Revision 1.23 by root, Wed Oct 31 20:10:17 2007 UTC vs. Revision 1.135 by root, Sat Nov 24 06:23:27 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.23 by root, Wed Oct 31 20:10:17 2007 UTC vs.
Revision 1.135 by root, Sat Nov 24 06:23:27 2007 UTC