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Comparing libev/ev.c (file contents):
Revision 1.34 by root, Thu Nov 1 11:43:11 2007 UTC vs.
Revision 1.134 by root, Fri Nov 23 19:13:33 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
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
29	#if EV_USE_CONFIG_H	37	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
30	# include "config.h"	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
31	#endif	99	#endif
32		100
33	#include <math.h>	101	#include <math.h>
34	#include <stdlib.h>	102	#include <stdlib.h>
35	#include <unistd.h>
36	#include <fcntl.h>	103	#include <fcntl.h>
37	#include <signal.h>
38	#include <stddef.h>	104	#include <stddef.h>
39		105
40	#include <stdio.h>	106	#include <stdio.h>
41		107
42	#include <assert.h>	108	#include <assert.h>
43	#include <errno.h>	109	#include <errno.h>
44	#include <sys/types.h>	110	#include <sys/types.h>
45	#include <sys/wait.h>
46	#include <sys/time.h>
47	#include <time.h>	111	#include <time.h>
48		112
		113	#include <signal.h>
		114
		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
		124	# endif
		125	#endif
		126
		127	/**/
		128
49	#ifndef EV_USE_MONOTONIC	129	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	130	# define EV_USE_MONOTONIC 0
52	# endif	131	#endif
		132
		133	#ifndef EV_USE_REALTIME
		134	# define EV_USE_REALTIME 0
53	#endif	135	#endif
54		136
55	#ifndef EV_USE_SELECT	137	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	138	# define EV_USE_SELECT 1
57	#endif	139	#endif
58		140
		141	#ifndef EV_USE_POLL
		142	# ifdef _WIN32
		143	# define EV_USE_POLL 0
		144	# else
		145	# define EV_USE_POLL 1
		146	# endif
		147	#endif
		148
59	#ifndef EV_USE_EPOLL	149	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	150	# define EV_USE_EPOLL 0
61	#endif	151	#endif
62		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
63	#ifndef CLOCK_REALTIME	168	#ifndef CLOCK_REALTIME
		169	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	170	# define EV_USE_REALTIME 0
65	#endif	171	#endif
66	#ifndef EV_USE_REALTIME	172
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
68	#endif	175	#endif
		176
		177	/**/
69		178
70	#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) */
71	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	180	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
72	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */	181	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
73	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	182	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
74		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
75	#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 */
76		206
77	typedef struct ev_watcher *W;	207	typedef struct ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	208	typedef struct ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	209	typedef struct ev_watcher_time *WT;
80		210
81	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
82	ev_tstamp ev_now;	300	ev_tstamp ev_rt_now;
83	int ev_method;	301	#define VAR(name,decl) static decl;
		302	#include "ev_vars.h"
		303	#undef VAR
84		304
85	static int have_monotonic; /* runtime */	305	static int ev_default_loop_ptr;
86		306
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	307	#endif
88	static void (*method_modify)(int fd, int oev, int nev);
89	static void (*method_poll)(ev_tstamp timeout);
90		308
91	/*****************************************************************************/	309	/*****************************************************************************/
92		310
93	ev_tstamp	311	ev_tstamp
94	ev_time (void)	312	ev_time (void)
…		…
102	gettimeofday (&tv, 0);	320	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	321	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	322	#endif
105	}	323	}
106		324
107	static ev_tstamp	325	inline ev_tstamp
108	get_clock (void)	326	get_clock (void)
109	{	327	{
110	#if EV_USE_MONOTONIC	328	#if EV_USE_MONOTONIC
111	if (have_monotonic)	329	if (expect_true (have_monotonic))
112	{	330	{
113	struct timespec ts;	331	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	332	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	333	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	334	}
117	#endif	335	#endif
118		336
119	return ev_time ();	337	return ev_time ();
120	}	338	}
121		339
		340	#if EV_MULTIPLICITY
		341	ev_tstamp
		342	ev_now (EV_P)
		343	{
		344	return ev_rt_now;
		345	}
		346	#endif
		347
122	#define array_roundsize(base,n) ((n) | 4 & ~3)	348	#define array_roundsize(type,n) (((n) | 4) & ~3)
123		349
124	#define array_needsize(base,cur,cnt,init) \	350	#define array_needsize(type,base,cur,cnt,init) \
125	if ((cnt) > cur) \	351	if (expect_false ((cnt) > cur)) \
126	{ \	352	{ \
127	int newcnt = cur; \	353	int newcnt = cur; \
128	do \	354	do \
129	{ \	355	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	356	newcnt = array_roundsize (type, newcnt << 1); \
131	} \	357	} \
132	while ((cnt) > newcnt); \	358	while ((cnt) > newcnt); \
133	\	359	\
134	base = realloc (base, sizeof (*base) * (newcnt)); \	360	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
135	init (base + cur, newcnt - cur); \	361	init (base + cur, newcnt - cur); \
136	cur = newcnt; \	362	cur = newcnt; \
137	}	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;
138		375
139	/*****************************************************************************/	376	/*****************************************************************************/
140
141	typedef struct
142	{
143	struct ev_io *head;
144	unsigned char events;
145	unsigned char reify;
146	} ANFD;
147
148	static ANFD *anfds;
149	static int anfdmax;
150		377
151	static void	378	static void
152	anfds_init (ANFD *base, int count)	379	anfds_init (ANFD *base, int count)
153	{	380	{
154	while (count--)	381	while (count--)
…		…
159		386
160	++base;	387	++base;
161	}	388	}
162	}	389	}
163		390
164	typedef struct	391	void
		392	ev_feed_event (EV_P_ void *w, int revents)
165	{	393	{
166	W w;	394	W w_ = (W)w;
167	int events;
168	} ANPENDING;
169		395
170	static ANPENDING *pendings;	396	if (expect_false (w_->pending))
171	static int pendingmax, pendingcnt;
172
173	static void
174	event (W w, int events)
175	{
176	if (w->pending)
177	{	397	{
178	pendings [w->pending - 1].events |= events;	398	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
179	return;	399	return;
180	}	400	}
181		401
		402	if (expect_false (!w_->cb))
		403	return;
		404
182	w->pending = ++pendingcnt;	405	w_->pending = ++pendingcnt [ABSPRI (w_)];
183	array_needsize (pendings, pendingmax, pendingcnt, );	406	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
184	pendings [pendingcnt - 1].w = w;	407	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
185	pendings [pendingcnt - 1].events = events;	408	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
186	}	409	}
187		410
188	static void	411	static void
189	queue_events (W *events, int eventcnt, int type)	412	queue_events (EV_P_ W *events, int eventcnt, int type)
190	{	413	{
191	int i;	414	int i;
192		415
193	for (i = 0; i < eventcnt; ++i)	416	for (i = 0; i < eventcnt; ++i)
194	event (events [i], type);	417	ev_feed_event (EV_A_ events [i], type);
195	}	418	}
196		419
197	static void	420	inline void
198	fd_event (int fd, int events)	421	fd_event (EV_P_ int fd, int revents)
199	{	422	{
200	ANFD *anfd = anfds + fd;	423	ANFD *anfd = anfds + fd;
201	struct ev_io *w;	424	struct ev_io *w;
202		425
203	for (w = anfd->head; w; w = w->next)	426	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
204	{	427	{
205	int ev = w->events & events;	428	int ev = w->events & revents;
206		429
207	if (ev)	430	if (ev)
208	event ((W)w, ev);	431	ev_feed_event (EV_A_ (W)w, ev);
209	}	432	}
		433	}
		434
		435	void
		436	ev_feed_fd_event (EV_P_ int fd, int revents)
		437	{
		438	fd_event (EV_A_ fd, revents);
210	}	439	}
211		440
212	/*****************************************************************************/	441	/*****************************************************************************/
213		442
214	static int *fdchanges;	443	inline void
215	static int fdchangemax, fdchangecnt;	444	fd_reify (EV_P)
216
217	static void
218	fd_reify (void)
219	{	445	{
220	int i;	446	int i;
221		447
222	for (i = 0; i < fdchangecnt; ++i)	448	for (i = 0; i < fdchangecnt; ++i)
223	{	449	{
…		…
225	ANFD *anfd = anfds + fd;	451	ANFD *anfd = anfds + fd;
226	struct ev_io *w;	452	struct ev_io *w;
227		453
228	int events = 0;	454	int events = 0;
229		455
230	for (w = anfd->head; w; w = w->next)	456	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
231	events |= w->events;	457	events |= w->events;
232		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
233	anfd->reify = 0;	468	anfd->reify = 0;
234		469
235	if (anfd->events != events)
236	{
237	method_modify (fd, anfd->events, events);	470	backend_modify (EV_A_ fd, anfd->events, events);
238	anfd->events = events;	471	anfd->events = events;
239	}
240	}	472	}
241		473
242	fdchangecnt = 0;	474	fdchangecnt = 0;
243	}	475	}
244		476
245	static void	477	static void
246	fd_change (int fd)	478	fd_change (EV_P_ int fd)
247	{	479	{
248	if (anfds [fd].reify || fdchangecnt < 0)	480	if (expect_false (anfds [fd].reify))
249	return;	481	return;
250		482
251	anfds [fd].reify = 1;	483	anfds [fd].reify = 1;
252		484
253	++fdchangecnt;	485	++fdchangecnt;
254	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	486	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
255	fdchanges [fdchangecnt - 1] = fd;	487	fdchanges [fdchangecnt - 1] = fd;
256	}	488	}
257		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
		510	}
		511
258	/* called on EBADF to verify fds */	512	/* called on EBADF to verify fds */
259	static void	513	static void
260	fd_recheck (void)	514	fd_ebadf (EV_P)
261	{	515	{
262	int fd;	516	int fd;
263		517
264	for (fd = 0; fd < anfdmax; ++fd)	518	for (fd = 0; fd < anfdmax; ++fd)
265	if (anfds [fd].events)	519	if (anfds [fd].events)
266	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	520	if (!fd_valid (fd) == -1 && errno == EBADF)
267	while (anfds [fd].head)	521	fd_kill (EV_A_ fd);
		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)
268	{	532	{
269	ev_io_stop (anfds [fd].head);	533	fd_kill (EV_A_ fd);
270	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	534	return;
271	}	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	}
272	}	551	}
273		552
274	/*****************************************************************************/	553	/*****************************************************************************/
275		554
276	static struct ev_timer **timers;
277	static int timermax, timercnt;
278
279	static struct ev_periodic **periodics;
280	static int periodicmax, periodiccnt;
281
282	static void	555	static void
283	upheap (WT *timers, int k)	556	upheap (WT *heap, int k)
284	{	557	{
285	WT w = timers [k];	558	WT w = heap [k];
286		559
287	while (k && timers [k >> 1]->at > w->at)	560	while (k && heap [k >> 1]->at > w->at)
288	{	561	{
289	timers [k] = timers [k >> 1];	562	heap [k] = heap [k >> 1];
290	timers [k]->active = k + 1;	563	((W)heap [k])->active = k + 1;
291	k >>= 1;	564	k >>= 1;
292	}	565	}
293		566
294	timers [k] = w;	567	heap [k] = w;
295	timers [k]->active = k + 1;	568	((W)heap [k])->active = k + 1;
296		569
297	}	570	}
298		571
299	static void	572	static void
300	downheap (WT *timers, int N, int k)	573	downheap (WT *heap, int N, int k)
301	{	574	{
302	WT w = timers [k];	575	WT w = heap [k];
303		576
304	while (k < (N >> 1))	577	while (k < (N >> 1))
305	{	578	{
306	int j = k << 1;	579	int j = k << 1;
307		580
308	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	581	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
309	++j;	582	++j;
310		583
311	if (w->at <= timers [j]->at)	584	if (w->at <= heap [j]->at)
312	break;	585	break;
313		586
314	timers [k] = timers [j];	587	heap [k] = heap [j];
315	timers [k]->active = k + 1;	588	((W)heap [k])->active = k + 1;
316	k = j;	589	k = j;
317	}	590	}
318		591
319	timers [k] = w;	592	heap [k] = w;
320	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);
321	}	601	}
322		602
323	/*****************************************************************************/	603	/*****************************************************************************/
324		604
325	typedef struct	605	typedef struct
326	{	606	{
327	struct ev_signal *head;	607	WL head;
328	sig_atomic_t volatile gotsig;	608	sig_atomic_t volatile gotsig;
329	} ANSIG;	609	} ANSIG;
330		610
331	static ANSIG *signals;	611	static ANSIG *signals;
332	static int signalmax;	612	static int signalmax;
…		…
348	}	628	}
349		629
350	static void	630	static void
351	sighandler (int signum)	631	sighandler (int signum)
352	{	632	{
		633	#if _WIN32
		634	signal (signum, sighandler);
		635	#endif
		636
353	signals [signum - 1].gotsig = 1;	637	signals [signum - 1].gotsig = 1;
354		638
355	if (!gotsig)	639	if (!gotsig)
356	{	640	{
		641	int old_errno = errno;
357	gotsig = 1;	642	gotsig = 1;
358	write (sigpipe [1], &signum, 1);	643	write (sigpipe [1], &signum, 1);
		644	errno = old_errno;
359	}	645	}
360	}	646	}
361		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
362	static void	668	static void
363	sigcb (struct ev_io *iow, int revents)	669	sigcb (EV_P_ struct ev_io *iow, int revents)
364	{	670	{
365	struct ev_signal *w;
366	int sig;	671	int signum;
367		672
368	read (sigpipe [0], &revents, 1);	673	read (sigpipe [0], &revents, 1);
369	gotsig = 0;	674	gotsig = 0;
370		675
371	for (sig = signalmax; sig--; )	676	for (signum = signalmax; signum--; )
372	if (signals [sig].gotsig)	677	if (signals [signum].gotsig)
373	{	678	ev_feed_signal_event (EV_A_ signum + 1);
374	signals [sig].gotsig = 0;
375
376	for (w = signals [sig].head; w; w = w->next)
377	event ((W)w, EV_SIGNAL);
378	}
379	}	679	}
380		680
381	static void	681	static void
382	siginit (void)	682	fd_intern (int fd)
383	{	683	{
		684	#ifdef _WIN32
		685	int arg = 1;
		686	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		687	#else
384	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	688	fcntl (fd, F_SETFD, FD_CLOEXEC);
385	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
386
387	/* rather than sort out wether we really need nb, set it */
388	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	689	fcntl (fd, F_SETFL, O_NONBLOCK);
389	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	690	#endif
		691	}
		692
		693	static void
		694	siginit (EV_P)
		695	{
		696	fd_intern (sigpipe [0]);
		697	fd_intern (sigpipe [1]);
390		698
391	ev_io_set (&sigev, sigpipe [0], EV_READ);	699	ev_io_set (&sigev, sigpipe [0], EV_READ);
392	ev_io_start (&sigev);	700	ev_io_start (EV_A_ &sigev);
		701	ev_unref (EV_A); /* child watcher should not keep loop alive */
393	}	702	}
394		703
395	/*****************************************************************************/	704	/*****************************************************************************/
396		705
397	static struct ev_idle **idles;
398	static int idlemax, idlecnt;
399
400	static struct ev_prepare **prepares;
401	static int preparemax, preparecnt;
402
403	static struct ev_check **checks;
404	static int checkmax, checkcnt;
405
406	/*****************************************************************************/
407
408	static struct ev_child *childs [PID_HASHSIZE];	706	static struct ev_child *childs [PID_HASHSIZE];
		707
		708	#ifndef _WIN32
		709
409	static struct ev_signal childev;	710	static struct ev_signal childev;
410		711
411	#ifndef WCONTINUED	712	#ifndef WCONTINUED
412	# define WCONTINUED 0	713	# define WCONTINUED 0
413	#endif	714	#endif
414		715
415	static void	716	static void
416	childcb (struct ev_signal *sw, int revents)	717	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
417	{	718	{
418	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	{
419	int pid, status;	734	int pid, status;
420		735
421	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	736	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
422	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	737	{
423	if (w->pid == pid || w->pid == -1)	738	/* make sure we are called again until all childs have been reaped */
424	{	739	/* we need to do it this way so that the callback gets called before we continue */
425	w->status = status;	740	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
426	event ((W)w, EV_CHILD);	741
427	}	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	}
428	}	745	}
		746
		747	#endif
429		748
430	/*****************************************************************************/	749	/*****************************************************************************/
431		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
432	#if EV_USE_EPOLL	757	#if EV_USE_EPOLL
433	# include "ev_epoll.c"	758	# include "ev_epoll.c"
434	#endif	759	#endif
		760	#if EV_USE_POLL
		761	# include "ev_poll.c"
		762	#endif
435	#if EV_USE_SELECT	763	#if EV_USE_SELECT
436	# include "ev_select.c"	764	# include "ev_select.c"
437	#endif	765	#endif
438		766
439	int	767	int
…		…
446	ev_version_minor (void)	774	ev_version_minor (void)
447	{	775	{
448	return EV_VERSION_MINOR;	776	return EV_VERSION_MINOR;
449	}	777	}
450		778
451	int ev_init (int flags)	779	/* return true if we are running with elevated privileges and should ignore env variables */
		780	static int
		781	enable_secure (void)
452	{	782	{
453	if (!ev_method)	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)
454	{	841	{
455	#if EV_USE_MONOTONIC	842	#if EV_USE_MONOTONIC
456	{	843	{
457	struct timespec ts;	844	struct timespec ts;
458	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	845	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
459	have_monotonic = 1;	846	have_monotonic = 1;
460	}	847	}
461	#endif	848	#endif
462		849
463	ev_now = ev_time ();	850	ev_rt_now = ev_time ();
464	now = get_clock ();	851	mn_now = get_clock ();
		852	now_floor = mn_now;
465	diff = ev_now - now;	853	rtmn_diff = ev_rt_now - mn_now;
466		854
467	if (pipe (sigpipe))	855	if (!(flags & EVFLAG_NOENV)
468	return 0;	856	&& !enable_secure ()
		857	&& getenv ("LIBEV_FLAGS"))
		858	flags = atoi (getenv ("LIBEV_FLAGS"));
469		859
470	ev_method = EVMETHOD_NONE;	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
471	#if EV_USE_EPOLL	870	#if EV_USE_EPOLL
472	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	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);
473	#endif	875	#endif
474	#if EV_USE_SELECT	876	#if EV_USE_SELECT
475	if (ev_method == EVMETHOD_NONE) select_init (flags);	877	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
476	#endif	878	#endif
477		879
478	if (ev_method)	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])
		993	if (pipe (sigpipe))
		994	return 0;
		995
		996	if (!ev_default_loop_ptr)
		997	{
		998	#if EV_MULTIPLICITY
		999	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1000	#else
		1001	ev_default_loop_ptr = 1;
		1002	#endif
		1003
		1004	loop_init (EV_A_ flags);
		1005
		1006	if (ev_backend (EV_A))
479	{	1007	{
480	ev_watcher_init (&sigev, sigcb);
481	siginit ();	1008	siginit (EV_A);
482		1009
		1010	#ifndef _WIN32
483	ev_signal_init (&childev, childcb, SIGCHLD);	1011	ev_signal_init (&childev, childcb, SIGCHLD);
		1012	ev_set_priority (&childev, EV_MAXPRI);
484	ev_signal_start (&childev);	1013	ev_signal_start (EV_A_ &childev);
		1014	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1015	#endif
485	}	1016	}
		1017	else
		1018	ev_default_loop_ptr = 0;
486	}	1019	}
487		1020
488	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;
489	}	1054	}
490		1055
491	/*****************************************************************************/	1056	/*****************************************************************************/
492		1057
493	void
494	ev_prefork (void)
495	{
496	/* nop */
497	}
498
499	void
500	ev_postfork_parent (void)
501	{
502	/* nop */
503	}
504
505	void
506	ev_postfork_child (void)
507	{
508	#if EV_USE_EPOLL
509	if (ev_method == EVMETHOD_EPOLL)
510	epoll_postfork_child ();
511	#endif
512
513	ev_io_stop (&sigev);
514	close (sigpipe [0]);
515	close (sigpipe [1]);
516	pipe (sigpipe);
517	siginit ();
518	}
519
520	/*****************************************************************************/
521
522	static void	1058	static int
		1059	any_pending (EV_P)
		1060	{
		1061	int pri;
		1062
		1063	for (pri = NUMPRI; pri--; )
		1064	if (pendingcnt [pri])
		1065	return 1;
		1066
		1067	return 0;
		1068	}
		1069
		1070	inline void
523	call_pending (void)	1071	call_pending (EV_P)
524	{	1072	{
		1073	int pri;
		1074
		1075	for (pri = NUMPRI; pri--; )
525	while (pendingcnt)	1076	while (pendingcnt [pri])
526	{	1077	{
527	ANPENDING *p = pendings + --pendingcnt;	1078	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
528		1079
529	if (p->w)	1080	if (expect_true (p->w))
530	{	1081	{
531	p->w->pending = 0;	1082	p->w->pending = 0;
532	p->w->cb (p->w, p->events);	1083	EV_CB_INVOKE (p->w, p->events);
533	}	1084	}
534	}	1085	}
535	}	1086	}
536		1087
537	static void	1088	inline void
538	timers_reify (void)	1089	timers_reify (EV_P)
539	{	1090	{
540	while (timercnt && timers [0]->at <= now)	1091	while (timercnt && ((WT)timers [0])->at <= mn_now)
541	{	1092	{
542	struct ev_timer *w = timers [0];	1093	struct ev_timer *w = timers [0];
		1094
		1095	assert (("inactive timer on timer heap detected", ev_is_active (w)));
543		1096
544	/* first reschedule or stop timer */	1097	/* first reschedule or stop timer */
545	if (w->repeat)	1098	if (w->repeat)
546	{	1099	{
547	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1100	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1101
548	w->at = now + w->repeat;	1102	((WT)w)->at += w->repeat;
		1103	if (((WT)w)->at < mn_now)
		1104	((WT)w)->at = mn_now;
		1105
549	downheap ((WT *)timers, timercnt, 0);	1106	downheap ((WT *)timers, timercnt, 0);
550	}	1107	}
551	else	1108	else
552	ev_timer_stop (w); /* nonrepeating: stop timer */	1109	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
553		1110
554	event ((W)w, EV_TIMEOUT);	1111	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
555	}	1112	}
556	}	1113	}
557		1114
558	static void	1115	#if EV_PERIODICS
		1116	inline void
559	periodics_reify (void)	1117	periodics_reify (EV_P)
560	{	1118	{
561	while (periodiccnt && periodics [0]->at <= ev_now)	1119	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
562	{	1120	{
563	struct ev_periodic *w = periodics [0];	1121	struct ev_periodic *w = periodics [0];
564		1122
		1123	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1124
565	/* first reschedule or stop timer */	1125	/* first reschedule or stop timer */
566	if (w->interval)	1126	if (w->reschedule_cb)
567	{	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	{
568	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;
569	assert (("ev_periodic timeout in the past detected while processing timers, 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));
570	downheap ((WT *)periodics, periodiccnt, 0);	1136	downheap ((WT *)periodics, periodiccnt, 0);
571	}	1137	}
572	else	1138	else
573	ev_periodic_stop (w); /* nonrepeating: stop timer */	1139	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
574		1140
575	event ((W)w, EV_PERIODIC);	1141	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
576	}	1142	}
577	}	1143	}
578		1144
579	static void	1145	static void
580	periodics_reschedule (ev_tstamp diff)	1146	periodics_reschedule (EV_P)
581	{	1147	{
582	int i;	1148	int i;
583		1149
584	/* adjust periodics after time jump */	1150	/* adjust periodics after time jump */
585	for (i = 0; i < periodiccnt; ++i)	1151	for (i = 0; i < periodiccnt; ++i)
586	{	1152	{
587	struct ev_periodic *w = periodics [i];	1153	struct ev_periodic *w = periodics [i];
588		1154
		1155	if (w->reschedule_cb)
		1156	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
589	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))
590	{	1194	{
591	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1195	ev_tstamp odiff = rtmn_diff;
592		1196
593	if (fabs (diff) >= 1e-4)	1197	for (i = 4; --i; ) /* loop a few times, before making important decisions */
594	{	1198	{
595	ev_periodic_stop (w);	1199	rtmn_diff = ev_rt_now - mn_now;
596	ev_periodic_start (w);
597		1200
598	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;
599	}	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) */
600	}	1214	}
601	}	1215	}
602	}	1216	else
603		1217	#endif
604	static void	1218	{
605	time_update (void)
606	{
607	int i;
608
609	ev_now = ev_time ();	1219	ev_rt_now = ev_time ();
610		1220
611	if (have_monotonic)	1221	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
612	{
613	ev_tstamp odiff = diff;
614
615	for (i = 4; --i; ) /* loop a few times, before making important decisions */
616	{	1222	{
617	now = get_clock ();	1223	#if EV_PERIODICS
618	diff = ev_now - now;
619
620	if (fabs (odiff - diff) < MIN_TIMEJUMP)
621	return; /* all is well */
622
623	ev_now = ev_time ();
624	}
625
626	periodics_reschedule (diff - odiff);
627	/* no timer adjustment, as the monotonic clock doesn't jump */
628	}
629	else
630	{
631	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
632	{
633	periodics_reschedule (ev_now - now);	1224	periodics_reschedule (EV_A);
		1225	#endif
634		1226
635	/* 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 */
636	for (i = 0; i < timercnt; ++i)	1228	for (i = 0; i < timercnt; ++i)
637	timers [i]->at += diff;	1229	((WT)timers [i])->at += ev_rt_now - mn_now;
638	}	1230	}
639		1231
640	now = ev_now;	1232	mn_now = ev_rt_now;
641	}	1233	}
642	}	1234	}
643		1235
644	int ev_loop_done;	1236	void
		1237	ev_ref (EV_P)
		1238	{
		1239	++activecnt;
		1240	}
645		1241
		1242	void
		1243	ev_unref (EV_P)
		1244	{
		1245	--activecnt;
		1246	}
		1247
		1248	static int loop_done;
		1249
		1250	void
646	void ev_loop (int flags)	1251	ev_loop (EV_P_ int flags)
647	{	1252	{
648	double block;	1253	double block;
649	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1254	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
650		1255
651	do	1256	while (activecnt)
652	{	1257	{
653	/* queue check watchers (and execute them) */	1258	/* queue check watchers (and execute them) */
654	if (preparecnt)	1259	if (expect_false (preparecnt))
655	{	1260	{
656	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1261	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
657	call_pending ();	1262	call_pending (EV_A);
658	}	1263	}
659		1264
		1265	/* we might have forked, so reify kernel state if necessary */
		1266	if (expect_false (postfork))
		1267	loop_fork (EV_A);
		1268
660	/* update fd-related kernel structures */	1269	/* update fd-related kernel structures */
661	fd_reify ();	1270	fd_reify (EV_A);
662		1271
663	/* calculate blocking time */	1272	/* calculate blocking time */
664		1273
665	/* we only need this for !monotonic clockor timers, but as we basically	1274	/* we only need this for !monotonic clock or timers, but as we basically
666	always have timers, we just calculate it always */	1275	always have timers, we just calculate it always */
		1276	#if EV_USE_MONOTONIC
		1277	if (expect_true (have_monotonic))
		1278	time_update_monotonic (EV_A);
		1279	else
		1280	#endif
		1281	{
667	ev_now = ev_time ();	1282	ev_rt_now = ev_time ();
		1283	mn_now = ev_rt_now;
		1284	}
668		1285
669	if (flags & EVLOOP_NONBLOCK || idlecnt)	1286	if (flags & EVLOOP_NONBLOCK || idlecnt)
670	block = 0.;	1287	block = 0.;
671	else	1288	else
672	{	1289	{
673	block = MAX_BLOCKTIME;	1290	block = MAX_BLOCKTIME;
674		1291
675	if (timercnt)	1292	if (timercnt)
676	{	1293	{
677	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1294	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
678	if (block > to) block = to;	1295	if (block > to) block = to;
679	}	1296	}
680		1297
		1298	#if EV_PERIODICS
681	if (periodiccnt)	1299	if (periodiccnt)
682	{	1300	{
683	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1301	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
684	if (block > to) block = to;	1302	if (block > to) block = to;
685	}	1303	}
		1304	#endif
686		1305
687	if (block < 0.) block = 0.;	1306	if (expect_false (block < 0.)) block = 0.;
688	}	1307	}
689		1308
690	method_poll (block);	1309	backend_poll (EV_A_ block);
691		1310
692	/* update ev_now, do magic */	1311	/* update ev_rt_now, do magic */
693	time_update ();	1312	time_update (EV_A);
694		1313
695	/* queue pending timers and reschedule them */	1314	/* queue pending timers and reschedule them */
696	timers_reify (); /* relative timers called last */	1315	timers_reify (EV_A); /* relative timers called last */
		1316	#if EV_PERIODICS
697	periodics_reify (); /* absolute timers called first */	1317	periodics_reify (EV_A); /* absolute timers called first */
		1318	#endif
698		1319
699	/* queue idle watchers unless io or timers are pending */	1320	/* queue idle watchers unless io or timers are pending */
700	if (!pendingcnt)	1321	if (idlecnt && !any_pending (EV_A))
701	queue_events ((W *)idles, idlecnt, EV_IDLE);	1322	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
702		1323
703	/* queue check watchers, to be executed first */	1324	/* queue check watchers, to be executed first */
704	if (checkcnt)	1325	if (expect_false (checkcnt))
705	queue_events ((W *)checks, checkcnt, EV_CHECK);	1326	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
706		1327
707	call_pending ();	1328	call_pending (EV_A);
708	}
709	while (!ev_loop_done);
710		1329
		1330	if (expect_false (loop_done))
		1331	break;
		1332	}
		1333
711	if (ev_loop_done != 2)	1334	if (loop_done != 2)
712	ev_loop_done = 0;	1335	loop_done = 0;
		1336	}
		1337
		1338	void
		1339	ev_unloop (EV_P_ int how)
		1340	{
		1341	loop_done = how;
713	}	1342	}
714		1343
715	/*****************************************************************************/	1344	/*****************************************************************************/
716		1345
717	static void	1346	inline void
718	wlist_add (WL *head, WL elem)	1347	wlist_add (WL *head, WL elem)
719	{	1348	{
720	elem->next = *head;	1349	elem->next = *head;
721	*head = elem;	1350	*head = elem;
722	}	1351	}
723		1352
724	static void	1353	inline void
725	wlist_del (WL *head, WL elem)	1354	wlist_del (WL *head, WL elem)
726	{	1355	{
727	while (*head)	1356	while (*head)
728	{	1357	{
729	if (*head == elem)	1358	if (*head == elem)
…		…
734		1363
735	head = &(*head)->next;	1364	head = &(*head)->next;
736	}	1365	}
737	}	1366	}
738		1367
739	static void	1368	inline void
740	ev_clear_pending (W w)	1369	ev_clear_pending (EV_P_ W w)
741	{	1370	{
742	if (w->pending)	1371	if (w->pending)
743	{	1372	{
744	pendings [w->pending - 1].w = 0;	1373	pendings [ABSPRI (w)][w->pending - 1].w = 0;
745	w->pending = 0;	1374	w->pending = 0;
746	}	1375	}
747	}	1376	}
748		1377
749	static void	1378	inline void
750	ev_start (W w, int active)	1379	ev_start (EV_P_ W w, int active)
751	{	1380	{
		1381	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1382	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1383
752	w->active = active;	1384	w->active = active;
		1385	ev_ref (EV_A);
753	}	1386	}
754		1387
755	static void	1388	inline void
756	ev_stop (W w)	1389	ev_stop (EV_P_ W w)
757	{	1390	{
		1391	ev_unref (EV_A);
758	w->active = 0;	1392	w->active = 0;
759	}	1393	}
760		1394
761	/*****************************************************************************/	1395	/*****************************************************************************/
762		1396
763	void	1397	void
764	ev_io_start (struct ev_io *w)	1398	ev_io_start (EV_P_ struct ev_io *w)
765	{	1399	{
766	if (ev_is_active (w))
767	return;
768
769	int fd = w->fd;	1400	int fd = w->fd;
770		1401
		1402	if (expect_false (ev_is_active (w)))
		1403	return;
		1404
771	assert (("ev_io_start called with negative fd", fd >= 0));	1405	assert (("ev_io_start called with negative fd", fd >= 0));
772		1406
773	ev_start ((W)w, 1);	1407	ev_start (EV_A_ (W)w, 1);
774	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1408	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
775	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1409	wlist_add ((WL *)&anfds[fd].head, (WL)w);
776		1410
777	fd_change (fd);	1411	fd_change (EV_A_ fd);
778	}	1412	}
779		1413
780	void	1414	void
781	ev_io_stop (struct ev_io *w)	1415	ev_io_stop (EV_P_ struct ev_io *w)
782	{	1416	{
783	ev_clear_pending ((W)w);	1417	ev_clear_pending (EV_A_ (W)w);
784	if (!ev_is_active (w))	1418	if (expect_false (!ev_is_active (w)))
785	return;	1419	return;
		1420
		1421	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
786		1422
787	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1423	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
788	ev_stop ((W)w);	1424	ev_stop (EV_A_ (W)w);
789		1425
790	fd_change (w->fd);	1426	fd_change (EV_A_ w->fd);
791	}	1427	}
792		1428
793	void	1429	void
794	ev_timer_start (struct ev_timer *w)	1430	ev_timer_start (EV_P_ struct ev_timer *w)
795	{	1431	{
796	if (ev_is_active (w))	1432	if (expect_false (ev_is_active (w)))
797	return;	1433	return;
798		1434
799	w->at += now;	1435	((WT)w)->at += mn_now;
800		1436
801	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1437	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
802		1438
803	ev_start ((W)w, ++timercnt);	1439	ev_start (EV_A_ (W)w, ++timercnt);
804	array_needsize (timers, timermax, timercnt, );	1440	array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2);
805	timers [timercnt - 1] = w;	1441	timers [timercnt - 1] = w;
806	upheap ((WT *)timers, timercnt - 1);	1442	upheap ((WT *)timers, timercnt - 1);
807	}
808		1443
		1444	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1445	}
		1446
809	void	1447	void
810	ev_timer_stop (struct ev_timer *w)	1448	ev_timer_stop (EV_P_ struct ev_timer *w)
811	{	1449	{
812	ev_clear_pending ((W)w);	1450	ev_clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1451	if (expect_false (!ev_is_active (w)))
814	return;	1452	return;
815		1453
		1454	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1455
816	if (w->active < timercnt--)	1456	if (expect_true (((W)w)->active < timercnt--))
817	{	1457	{
818	timers [w->active - 1] = timers [timercnt];	1458	timers [((W)w)->active - 1] = timers [timercnt];
819	downheap ((WT *)timers, timercnt, w->active - 1);	1459	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
820	}	1460	}
821		1461
822	w->at = w->repeat;	1462	((WT)w)->at -= mn_now;
823		1463
824	ev_stop ((W)w);	1464	ev_stop (EV_A_ (W)w);
825	}	1465	}
826		1466
827	void	1467	void
828	ev_timer_again (struct ev_timer *w)	1468	ev_timer_again (EV_P_ struct ev_timer *w)
829	{	1469	{
830	if (ev_is_active (w))	1470	if (ev_is_active (w))
831	{	1471	{
832	if (w->repeat)	1472	if (w->repeat)
833	{	1473	{
834	w->at = now + w->repeat;	1474	((WT)w)->at = mn_now + w->repeat;
835	downheap ((WT *)timers, timercnt, w->active - 1);	1475	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
836	}	1476	}
837	else	1477	else
838	ev_timer_stop (w);	1478	ev_timer_stop (EV_A_ w);
839	}	1479	}
840	else if (w->repeat)	1480	else if (w->repeat)
		1481	{
		1482	w->at = w->repeat;
841	ev_timer_start (w);	1483	ev_timer_start (EV_A_ w);
		1484	}
842	}	1485	}
843		1486
		1487	#if EV_PERIODICS
844	void	1488	void
845	ev_periodic_start (struct ev_periodic *w)	1489	ev_periodic_start (EV_P_ struct ev_periodic *w)
846	{	1490	{
847	if (ev_is_active (w))	1491	if (expect_false (ev_is_active (w)))
848	return;	1492	return;
849		1493
		1494	if (w->reschedule_cb)
		1495	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1496	else if (w->interval)
		1497	{
850	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1498	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
851
852	/* this formula differs from the one in periodic_reify because we do not always round up */	1499	/* this formula differs from the one in periodic_reify because we do not always round up */
853	if (w->interval)
854	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1500	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1501	}
855		1502
856	ev_start ((W)w, ++periodiccnt);	1503	ev_start (EV_A_ (W)w, ++periodiccnt);
857	array_needsize (periodics, periodicmax, periodiccnt, );	1504	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
858	periodics [periodiccnt - 1] = w;	1505	periodics [periodiccnt - 1] = w;
859	upheap ((WT *)periodics, periodiccnt - 1);	1506	upheap ((WT *)periodics, periodiccnt - 1);
860	}
861		1507
		1508	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1509	}
		1510
862	void	1511	void
863	ev_periodic_stop (struct ev_periodic *w)	1512	ev_periodic_stop (EV_P_ struct ev_periodic *w)
864	{	1513	{
865	ev_clear_pending ((W)w);	1514	ev_clear_pending (EV_A_ (W)w);
866	if (!ev_is_active (w))	1515	if (expect_false (!ev_is_active (w)))
867	return;	1516	return;
868		1517
		1518	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1519
869	if (w->active < periodiccnt--)	1520	if (expect_true (((W)w)->active < periodiccnt--))
870	{	1521	{
871	periodics [w->active - 1] = periodics [periodiccnt];	1522	periodics [((W)w)->active - 1] = periodics [periodiccnt];
872	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1523	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
873	}	1524	}
874		1525
875	ev_stop ((W)w);	1526	ev_stop (EV_A_ (W)w);
876	}	1527	}
877		1528
878	void	1529	void
		1530	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1531	{
		1532	/* TODO: use adjustheap and recalculation */
		1533	ev_periodic_stop (EV_A_ w);
		1534	ev_periodic_start (EV_A_ w);
		1535	}
		1536	#endif
		1537
		1538	void
		1539	ev_idle_start (EV_P_ struct ev_idle *w)
		1540	{
		1541	if (expect_false (ev_is_active (w)))
		1542	return;
		1543
		1544	ev_start (EV_A_ (W)w, ++idlecnt);
		1545	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1546	idles [idlecnt - 1] = w;
		1547	}
		1548
		1549	void
		1550	ev_idle_stop (EV_P_ struct ev_idle *w)
		1551	{
		1552	ev_clear_pending (EV_A_ (W)w);
		1553	if (expect_false (!ev_is_active (w)))
		1554	return;
		1555
		1556	idles [((W)w)->active - 1] = idles [--idlecnt];
		1557	ev_stop (EV_A_ (W)w);
		1558	}
		1559
		1560	void
		1561	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1562	{
		1563	if (expect_false (ev_is_active (w)))
		1564	return;
		1565
		1566	ev_start (EV_A_ (W)w, ++preparecnt);
		1567	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1568	prepares [preparecnt - 1] = w;
		1569	}
		1570
		1571	void
		1572	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1573	{
		1574	ev_clear_pending (EV_A_ (W)w);
		1575	if (expect_false (!ev_is_active (w)))
		1576	return;
		1577
		1578	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1579	ev_stop (EV_A_ (W)w);
		1580	}
		1581
		1582	void
		1583	ev_check_start (EV_P_ struct ev_check *w)
		1584	{
		1585	if (expect_false (ev_is_active (w)))
		1586	return;
		1587
		1588	ev_start (EV_A_ (W)w, ++checkcnt);
		1589	array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1590	checks [checkcnt - 1] = w;
		1591	}
		1592
		1593	void
		1594	ev_check_stop (EV_P_ struct ev_check *w)
		1595	{
		1596	ev_clear_pending (EV_A_ (W)w);
		1597	if (expect_false (!ev_is_active (w)))
		1598	return;
		1599
		1600	checks [((W)w)->active - 1] = checks [--checkcnt];
		1601	ev_stop (EV_A_ (W)w);
		1602	}
		1603
		1604	#ifndef SA_RESTART
		1605	# define SA_RESTART 0
		1606	#endif
		1607
		1608	void
879	ev_signal_start (struct ev_signal *w)	1609	ev_signal_start (EV_P_ struct ev_signal *w)
880	{	1610	{
		1611	#if EV_MULTIPLICITY
		1612	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1613	#endif
881	if (ev_is_active (w))	1614	if (expect_false (ev_is_active (w)))
882	return;	1615	return;
883		1616
884	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1617	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
885		1618
886	ev_start ((W)w, 1);	1619	ev_start (EV_A_ (W)w, 1);
887	array_needsize (signals, signalmax, w->signum, signals_init);	1620	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
888	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1621	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
889		1622
890	if (!w->next)	1623	if (!((WL)w)->next)
891	{	1624	{
		1625	#if _WIN32
		1626	signal (w->signum, sighandler);
		1627	#else
892	struct sigaction sa;	1628	struct sigaction sa;
893	sa.sa_handler = sighandler;	1629	sa.sa_handler = sighandler;
894	sigfillset (&sa.sa_mask);	1630	sigfillset (&sa.sa_mask);
895	sa.sa_flags = 0;	1631	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
896	sigaction (w->signum, &sa, 0);	1632	sigaction (w->signum, &sa, 0);
		1633	#endif
897	}	1634	}
898	}	1635	}
899		1636
900	void	1637	void
901	ev_signal_stop (struct ev_signal *w)	1638	ev_signal_stop (EV_P_ struct ev_signal *w)
902	{	1639	{
903	ev_clear_pending ((W)w);	1640	ev_clear_pending (EV_A_ (W)w);
904	if (!ev_is_active (w))	1641	if (expect_false (!ev_is_active (w)))
905	return;	1642	return;
906		1643
907	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1644	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
908	ev_stop ((W)w);	1645	ev_stop (EV_A_ (W)w);
909		1646
910	if (!signals [w->signum - 1].head)	1647	if (!signals [w->signum - 1].head)
911	signal (w->signum, SIG_DFL);	1648	signal (w->signum, SIG_DFL);
912	}	1649	}
913		1650
914	void	1651	void
915	ev_idle_start (struct ev_idle *w)
916	{
917	if (ev_is_active (w))
918	return;
919
920	ev_start ((W)w, ++idlecnt);
921	array_needsize (idles, idlemax, idlecnt, );
922	idles [idlecnt - 1] = w;
923	}
924
925	void
926	ev_idle_stop (struct ev_idle *w)
927	{
928	ev_clear_pending ((W)w);
929	if (ev_is_active (w))
930	return;
931
932	idles [w->active - 1] = idles [--idlecnt];
933	ev_stop ((W)w);
934	}
935
936	void
937	ev_prepare_start (struct ev_prepare *w)
938	{
939	if (ev_is_active (w))
940	return;
941
942	ev_start ((W)w, ++preparecnt);
943	array_needsize (prepares, preparemax, preparecnt, );
944	prepares [preparecnt - 1] = w;
945	}
946
947	void
948	ev_prepare_stop (struct ev_prepare *w)
949	{
950	ev_clear_pending ((W)w);
951	if (ev_is_active (w))
952	return;
953
954	prepares [w->active - 1] = prepares [--preparecnt];
955	ev_stop ((W)w);
956	}
957
958	void
959	ev_check_start (struct ev_check *w)
960	{
961	if (ev_is_active (w))
962	return;
963
964	ev_start ((W)w, ++checkcnt);
965	array_needsize (checks, checkmax, checkcnt, );
966	checks [checkcnt - 1] = w;
967	}
968
969	void
970	ev_check_stop (struct ev_check *w)
971	{
972	ev_clear_pending ((W)w);
973	if (ev_is_active (w))
974	return;
975
976	checks [w->active - 1] = checks [--checkcnt];
977	ev_stop ((W)w);
978	}
979
980	void
981	ev_child_start (struct ev_child *w)	1652	ev_child_start (EV_P_ struct ev_child *w)
982	{	1653	{
		1654	#if EV_MULTIPLICITY
		1655	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1656	#endif
983	if (ev_is_active (w))	1657	if (expect_false (ev_is_active (w)))
984	return;	1658	return;
985		1659
986	ev_start ((W)w, 1);	1660	ev_start (EV_A_ (W)w, 1);
987	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1661	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
988	}	1662	}
989		1663
990	void	1664	void
991	ev_child_stop (struct ev_child *w)	1665	ev_child_stop (EV_P_ struct ev_child *w)
992	{	1666	{
993	ev_clear_pending ((W)w);	1667	ev_clear_pending (EV_A_ (W)w);
994	if (ev_is_active (w))	1668	if (expect_false (!ev_is_active (w)))
995	return;	1669	return;
996		1670
997	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1671	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
998	ev_stop ((W)w);	1672	ev_stop (EV_A_ (W)w);
999	}	1673	}
		1674
		1675	#if EV_MULTIPLICITY
		1676	static void
		1677	embed_cb (EV_P_ struct ev_io *io, int revents)
		1678	{
		1679	struct ev_embed *w = (struct ev_embed *)(((char *)io) - offsetof (struct ev_embed, io));
		1680
		1681	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		1682	ev_loop (w->loop, EVLOOP_NONBLOCK);
		1683	}
		1684
		1685	void
		1686	ev_embed_start (EV_P_ struct ev_embed *w)
		1687	{
		1688	if (expect_false (ev_is_active (w)))
		1689	return;
		1690
		1691	{
		1692	struct ev_loop *loop = w->loop;
		1693	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		1694	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		1695	}
		1696
		1697	ev_io_start (EV_A_ &w->io);
		1698	ev_start (EV_A_ (W)w, 1);
		1699	}
		1700
		1701	void
		1702	ev_embed_stop (EV_P_ struct ev_embed *w)
		1703	{
		1704	ev_clear_pending (EV_A_ (W)w);
		1705	if (expect_false (!ev_is_active (w)))
		1706	return;
		1707
		1708	ev_io_stop (EV_A_ &w->io);
		1709	ev_stop (EV_A_ (W)w);
		1710	}
		1711	#endif
1000		1712
1001	/*****************************************************************************/	1713	/*****************************************************************************/
1002		1714
1003	struct ev_once	1715	struct ev_once
1004	{	1716	{
…		…
1007	void (*cb)(int revents, void *arg);	1719	void (*cb)(int revents, void *arg);
1008	void *arg;	1720	void *arg;
1009	};	1721	};
1010		1722
1011	static void	1723	static void
1012	once_cb (struct ev_once *once, int revents)	1724	once_cb (EV_P_ struct ev_once *once, int revents)
1013	{	1725	{
1014	void (*cb)(int revents, void *arg) = once->cb;	1726	void (*cb)(int revents, void *arg) = once->cb;
1015	void *arg = once->arg;	1727	void *arg = once->arg;
1016		1728
1017	ev_io_stop (&once->io);	1729	ev_io_stop (EV_A_ &once->io);
1018	ev_timer_stop (&once->to);	1730	ev_timer_stop (EV_A_ &once->to);
1019	free (once);	1731	ev_free (once);
1020		1732
1021	cb (revents, arg);	1733	cb (revents, arg);
1022	}	1734	}
1023		1735
1024	static void	1736	static void
1025	once_cb_io (struct ev_io *w, int revents)	1737	once_cb_io (EV_P_ struct ev_io *w, int revents)
1026	{	1738	{
1027	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1739	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1028	}	1740	}
1029		1741
1030	static void	1742	static void
1031	once_cb_to (struct ev_timer *w, int revents)	1743	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1032	{	1744	{
1033	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1745	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1034	}	1746	}
1035		1747
1036	void	1748	void
1037	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1749	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1038	{	1750	{
1039	struct ev_once *once = malloc (sizeof (struct ev_once));	1751	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1040		1752
1041	if (!once)	1753	if (expect_false (!once))
		1754	{
1042	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1755	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1043	else	1756	return;
1044	{	1757	}
		1758
1045	once->cb = cb;	1759	once->cb = cb;
1046	once->arg = arg;	1760	once->arg = arg;
1047		1761
1048	ev_watcher_init (&once->io, once_cb_io);	1762	ev_init (&once->io, once_cb_io);
1049	if (fd >= 0)	1763	if (fd >= 0)
1050	{	1764	{
1051	ev_io_set (&once->io, fd, events);	1765	ev_io_set (&once->io, fd, events);
1052	ev_io_start (&once->io);	1766	ev_io_start (EV_A_ &once->io);
1053	}	1767	}
1054		1768
1055	ev_watcher_init (&once->to, once_cb_to);	1769	ev_init (&once->to, once_cb_to);
1056	if (timeout >= 0.)	1770	if (timeout >= 0.)
1057	{	1771	{
1058	ev_timer_set (&once->to, timeout, 0.);	1772	ev_timer_set (&once->to, timeout, 0.);
1059	ev_timer_start (&once->to);	1773	ev_timer_start (EV_A_ &once->to);
1060	}
1061	}
1062	}
1063
1064	/*****************************************************************************/
1065
1066	#if 0
1067
1068	struct ev_io wio;
1069
1070	static void
1071	sin_cb (struct ev_io *w, int revents)
1072	{
1073	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1074	}
1075
1076	static void
1077	ocb (struct ev_timer *w, int revents)
1078	{
1079	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1080	ev_timer_stop (w);
1081	ev_timer_start (w);
1082	}
1083
1084	static void
1085	scb (struct ev_signal *w, int revents)
1086	{
1087	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1088	ev_io_stop (&wio);
1089	ev_io_start (&wio);
1090	}
1091
1092	static void
1093	gcb (struct ev_signal *w, int revents)
1094	{
1095	fprintf (stderr, "generic %x\n", revents);
1096
1097	}
1098
1099	int main (void)
1100	{
1101	ev_init (0);
1102
1103	ev_io_init (&wio, sin_cb, 0, EV_READ);
1104	ev_io_start (&wio);
1105
1106	struct ev_timer t[10000];
1107
1108	#if 0
1109	int i;
1110	for (i = 0; i < 10000; ++i)
1111	{	1774	}
1112	struct ev_timer *w = t + i;
1113	ev_watcher_init (w, ocb, i);
1114	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1115	ev_timer_start (w);
1116	if (drand48 () < 0.5)
1117	ev_timer_stop (w);
1118	}
1119	#endif
1120
1121	struct ev_timer t1;
1122	ev_timer_init (&t1, ocb, 5, 10);
1123	ev_timer_start (&t1);
1124
1125	struct ev_signal sig;
1126	ev_signal_init (&sig, scb, SIGQUIT);
1127	ev_signal_start (&sig);
1128
1129	struct ev_check cw;
1130	ev_check_init (&cw, gcb);
1131	ev_check_start (&cw);
1132
1133	struct ev_idle iw;
1134	ev_idle_init (&iw, gcb);
1135	ev_idle_start (&iw);
1136
1137	ev_loop (0);
1138
1139	return 0;
1140	}	1775	}
1141		1776
		1777	#ifdef __cplusplus
		1778	}
1142	#endif	1779	#endif
1143		1780
1144
1145
1146

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