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Comparing libev/ev.c (file contents):
Revision 1.67 by root, Mon Nov 5 16:42:15 2007 UTC vs.
Revision 1.137 by root, Sat Nov 24 08:28:10 2007 UTC

…		…
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (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
29	* 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.
30	*/	30	*/
		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
31	#ifndef EV_STANDALONE	36	#ifndef EV_STANDALONE
		37	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
32	# include "config.h"	40	# include "config.h"
		41	# endif
33		42
34	# if HAVE_CLOCK_GETTIME	43	# if HAVE_CLOCK_GETTIME
		44	# ifndef EV_USE_MONOTONIC
35	# define EV_USE_MONOTONIC 1	45	# define EV_USE_MONOTONIC 1
		46	# endif
		47	# ifndef EV_USE_REALTIME
36	# define EV_USE_REALTIME 1	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
37	# endif	57	# endif
38		58
		59	# ifndef EV_USE_SELECT
39	# if HAVE_SELECT && HAVE_SYS_SELECT_H	60	# if HAVE_SELECT && HAVE_SYS_SELECT_H
40	# define EV_USE_SELECT 1	61	# define EV_USE_SELECT 1
		62	# else
		63	# define EV_USE_SELECT 0
		64	# endif
41	# endif	65	# endif
42		66
		67	# ifndef EV_USE_POLL
43	# if HAVE_POLL && HAVE_POLL_H	68	# if HAVE_POLL && HAVE_POLL_H
44	# define EV_USE_POLL 1	69	# define EV_USE_POLL 1
		70	# else
		71	# define EV_USE_POLL 0
		72	# endif
45	# endif	73	# endif
46		74
		75	# ifndef EV_USE_EPOLL
47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H	76	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
48	# define EV_USE_EPOLL 1	77	# define EV_USE_EPOLL 1
		78	# else
		79	# define EV_USE_EPOLL 0
		80	# endif
49	# endif	81	# endif
50		82
		83	# ifndef EV_USE_KQUEUE
51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H	84	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
52	# define EV_USE_KQUEUE 1	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
53	# endif	97	# endif
54		98
55	#endif	99	#endif
56		100
57	#include <math.h>	101	#include <math.h>
58	#include <stdlib.h>	102	#include <stdlib.h>
59	#include <unistd.h>
60	#include <fcntl.h>	103	#include <fcntl.h>
61	#include <signal.h>
62	#include <stddef.h>	104	#include <stddef.h>
63		105
64	#include <stdio.h>	106	#include <stdio.h>
65		107
66	#include <assert.h>	108	#include <assert.h>
67	#include <errno.h>	109	#include <errno.h>
68	#include <sys/types.h>	110	#include <sys/types.h>
		111	#include <time.h>
		112
		113	#include <signal.h>
		114
69	#ifndef WIN32	115	#ifndef _WIN32
		116	# include <unistd.h>
		117	# include <sys/time.h>
70	# include <sys/wait.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
71	#endif	124	# endif
72	#include <sys/time.h>	125	#endif
73	#include <time.h>
74		126
75	/**/	127	/**/
76		128
77	#ifndef EV_USE_MONOTONIC	129	#ifndef EV_USE_MONOTONIC
78	# define EV_USE_MONOTONIC 1	130	# define EV_USE_MONOTONIC 0
		131	#endif
		132
		133	#ifndef EV_USE_REALTIME
		134	# define EV_USE_REALTIME 0
79	#endif	135	#endif
80		136
81	#ifndef EV_USE_SELECT	137	#ifndef EV_USE_SELECT
82	# define EV_USE_SELECT 1	138	# define EV_USE_SELECT 1
83	#endif	139	#endif
84		140
85	#ifndef EV_USE_POLL	141	#ifndef EV_USE_POLL
86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */	142	# ifdef _WIN32
		143	# define EV_USE_POLL 0
		144	# else
		145	# define EV_USE_POLL 1
		146	# endif
87	#endif	147	#endif
88		148
89	#ifndef EV_USE_EPOLL	149	#ifndef EV_USE_EPOLL
90	# define EV_USE_EPOLL 0	150	# define EV_USE_EPOLL 0
91	#endif	151	#endif
92		152
93	#ifndef EV_USE_KQUEUE	153	#ifndef EV_USE_KQUEUE
94	# define EV_USE_KQUEUE 0	154	# define EV_USE_KQUEUE 0
95	#endif	155	#endif
96		156
97	#ifndef EV_USE_WIN32
98	# ifdef WIN32
99	# define EV_USE_WIN32 1
100	# else
101	# define EV_USE_WIN32 0
102	# endif
103	#endif
104
105	#ifndef EV_USE_REALTIME	157	#ifndef EV_USE_PORT
106	# define EV_USE_REALTIME 1	158	# define EV_USE_PORT 0
107	#endif	159	#endif
108		160
109	/**/	161	/**/
110		162
111	#ifndef CLOCK_MONOTONIC	163	#ifndef CLOCK_MONOTONIC
…		…
116	#ifndef CLOCK_REALTIME	168	#ifndef CLOCK_REALTIME
117	# undef EV_USE_REALTIME	169	# undef EV_USE_REALTIME
118	# define EV_USE_REALTIME 0	170	# define EV_USE_REALTIME 0
119	#endif	171	#endif
120		172
		173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
		175	#endif
		176
121	/**/	177	/**/
122		178
123	#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) */
124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */	180	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
125	#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 */
126	/*#define CLEANUP_INTERVAL 300. /* 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 */
127		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
128	#include "ev.h"	187	# include "ev.h"
		188	#endif
129		189
130	#if __GNUC__ >= 3	190	#if __GNUC__ >= 3
131	# define expect(expr,value) __builtin_expect ((expr),(value))	191	# define expect(expr,value) __builtin_expect ((expr),(value))
132	# define inline inline	192	# define inline static inline
133	#else	193	#else
134	# define expect(expr,value) (expr)	194	# define expect(expr,value) (expr)
135	# define inline static	195	# define inline static
136	#endif	196	#endif
137		197
…		…
139	#define expect_true(expr) expect ((expr) != 0, 1)	199	#define expect_true(expr) expect ((expr) != 0, 1)
140		200
141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	201	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	202	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
143		203
		204	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		205	#define EMPTY2(a,b) /* used to suppress some warnings */
		206
144	typedef struct ev_watcher *W;	207	typedef ev_watcher *W;
145	typedef struct ev_watcher_list *WL;	208	typedef ev_watcher_list *WL;
146	typedef struct ev_watcher_time *WT;	209	typedef ev_watcher_time *WT;
147		210
148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	211	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
149		212
150	#if WIN32	213	#ifdef _WIN32
151	/* note: the comment below could not be substantiated, but what would I care */	214	# include "ev_win32.c"
152	/* MSDN says this is required to handle SIGFPE */
153	volatile double SIGFPE_REQ = 0.0f;
154	#endif	215	#endif
155		216
156	/*****************************************************************************/	217	/*****************************************************************************/
157		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
158	typedef struct	267	typedef struct
159	{	268	{
160	struct ev_watcher_list *head;	269	WL head;
161	unsigned char events;	270	unsigned char events;
162	unsigned char reify;	271	unsigned char reify;
		272	#if EV_SELECT_IS_WINSOCKET
		273	SOCKET handle;
		274	#endif
163	} ANFD;	275	} ANFD;
164		276
165	typedef struct	277	typedef struct
166	{	278	{
167	W w;	279	W w;
168	int events;	280	int events;
169	} ANPENDING;	281	} ANPENDING;
170		282
171	#if EV_MULTIPLICITY	283	#if EV_MULTIPLICITY
172		284
173	struct ev_loop	285	struct ev_loop
174	{	286	{
		287	ev_tstamp ev_rt_now;
		288	#define ev_rt_now ((loop)->ev_rt_now)
175	# define VAR(name,decl) decl;	289	#define VAR(name,decl) decl;
176	# include "ev_vars.h"	290	#include "ev_vars.h"
177	};
178	# undef VAR	291	#undef VAR
		292	};
179	# include "ev_wrap.h"	293	#include "ev_wrap.h"
		294
		295	static struct ev_loop default_loop_struct;
		296	struct ev_loop *ev_default_loop_ptr;
180		297
181	#else	298	#else
182		299
		300	ev_tstamp ev_rt_now;
183	# define VAR(name,decl) static decl;	301	#define VAR(name,decl) static decl;
184	# include "ev_vars.h"	302	#include "ev_vars.h"
185	# undef VAR	303	#undef VAR
		304
		305	static int ev_default_loop_ptr;
186		306
187	#endif	307	#endif
188		308
189	/*****************************************************************************/	309	/*****************************************************************************/
190		310
191	inline ev_tstamp	311	ev_tstamp
192	ev_time (void)	312	ev_time (void)
193	{	313	{
194	#if EV_USE_REALTIME	314	#if EV_USE_REALTIME
195	struct timespec ts;	315	struct timespec ts;
196	clock_gettime (CLOCK_REALTIME, &ts);	316	clock_gettime (CLOCK_REALTIME, &ts);
…		…
215	#endif	335	#endif
216		336
217	return ev_time ();	337	return ev_time ();
218	}	338	}
219		339
		340	#if EV_MULTIPLICITY
220	ev_tstamp	341	ev_tstamp
221	ev_now (EV_P)	342	ev_now (EV_P)
222	{	343	{
223	return rt_now;	344	return ev_rt_now;
224	}	345	}
		346	#endif
225		347
226	#define array_roundsize(base,n) ((n) | 4 & ~3)	348	#define array_roundsize(type,n) (((n) | 4) & ~3)
227		349
228	#define array_needsize(base,cur,cnt,init) \	350	#define array_needsize(type,base,cur,cnt,init) \
229	if (expect_false ((cnt) > cur)) \	351	if (expect_false ((cnt) > cur)) \
230	{ \	352	{ \
231	int newcnt = cur; \	353	int newcnt = cur; \
232	do \	354	do \
233	{ \	355	{ \
234	newcnt = array_roundsize (base, newcnt << 1); \	356	newcnt = array_roundsize (type, newcnt << 1); \
235	} \	357	} \
236	while ((cnt) > newcnt); \	358	while ((cnt) > newcnt); \
237	\	359	\
238	base = realloc (base, sizeof (*base) * (newcnt)); \	360	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
239	init (base + cur, newcnt - cur); \	361	init (base + cur, newcnt - cur); \
240	cur = newcnt; \	362	cur = newcnt; \
241	}	363	}
242		364
243	#define array_slim(stem) \	365	#define array_slim(type,stem) \
244	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \	366	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
245	{ \	367	{ \
246	stem ## max = array_roundsize (stem ## cnt >> 1); \	368	stem ## max = array_roundsize (stem ## cnt >> 1); \
247	base = realloc (base, sizeof (*base) * (stem ## max)); \	369	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
248	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	370	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
249	}	371	}
250		372
251	#define array_free(stem, idx) \	373	#define array_free(stem, idx) \
252	free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	374	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
253		375
254	/*****************************************************************************/	376	/*****************************************************************************/
255		377
256	static void	378	static void
257	anfds_init (ANFD *base, int count)	379	anfds_init (ANFD *base, int count)
…		…
264		386
265	++base;	387	++base;
266	}	388	}
267	}	389	}
268		390
269	static void	391	void
270	event (EV_P_ W w, int events)	392	ev_feed_event (EV_P_ void *w, int revents)
271	{	393	{
272	if (w->pending)	394	W w_ = (W)w;
		395
		396	if (expect_false (w_->pending))
273	{	397	{
274	pendings [ABSPRI (w)][w->pending - 1].events |= events;	398	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
275	return;	399	return;
276	}	400	}
277		401
278	w->pending = ++pendingcnt [ABSPRI (w)];	402	w_->pending = ++pendingcnt [ABSPRI (w_)];
279	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );	403	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
280	pendings [ABSPRI (w)][w->pending - 1].w = w;	404	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
281	pendings [ABSPRI (w)][w->pending - 1].events = events;	405	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
282	}	406	}
283		407
284	static void	408	static void
285	queue_events (EV_P_ W *events, int eventcnt, int type)	409	queue_events (EV_P_ W *events, int eventcnt, int type)
286	{	410	{
287	int i;	411	int i;
288		412
289	for (i = 0; i < eventcnt; ++i)	413	for (i = 0; i < eventcnt; ++i)
290	event (EV_A_ events [i], type);	414	ev_feed_event (EV_A_ events [i], type);
291	}	415	}
292		416
293	static void	417	inline void
294	fd_event (EV_P_ int fd, int events)	418	fd_event (EV_P_ int fd, int revents)
295	{	419	{
296	ANFD *anfd = anfds + fd;	420	ANFD *anfd = anfds + fd;
297	struct ev_io *w;	421	ev_io *w;
298		422
299	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	423	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
300	{	424	{
301	int ev = w->events & events;	425	int ev = w->events & revents;
302		426
303	if (ev)	427	if (ev)
304	event (EV_A_ (W)w, ev);	428	ev_feed_event (EV_A_ (W)w, ev);
305	}	429	}
		430	}
		431
		432	void
		433	ev_feed_fd_event (EV_P_ int fd, int revents)
		434	{
		435	fd_event (EV_A_ fd, revents);
306	}	436	}
307		437
308	/*****************************************************************************/	438	/*****************************************************************************/
309		439
310	static void	440	inline void
311	fd_reify (EV_P)	441	fd_reify (EV_P)
312	{	442	{
313	int i;	443	int i;
314		444
315	for (i = 0; i < fdchangecnt; ++i)	445	for (i = 0; i < fdchangecnt; ++i)
316	{	446	{
317	int fd = fdchanges [i];	447	int fd = fdchanges [i];
318	ANFD *anfd = anfds + fd;	448	ANFD *anfd = anfds + fd;
319	struct ev_io *w;	449	ev_io *w;
320		450
321	int events = 0;	451	int events = 0;
322		452
323	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	453	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
324	events |= w->events;	454	events |= w->events;
325		455
		456	#if EV_SELECT_IS_WINSOCKET
		457	if (events)
		458	{
		459	unsigned long argp;
		460	anfd->handle = _get_osfhandle (fd);
		461	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		462	}
		463	#endif
		464
326	anfd->reify = 0;	465	anfd->reify = 0;
327		466
328	method_modify (EV_A_ fd, anfd->events, events);	467	backend_modify (EV_A_ fd, anfd->events, events);
329	anfd->events = events;	468	anfd->events = events;
330	}	469	}
331		470
332	fdchangecnt = 0;	471	fdchangecnt = 0;
333	}	472	}
334		473
335	static void	474	static void
336	fd_change (EV_P_ int fd)	475	fd_change (EV_P_ int fd)
337	{	476	{
338	if (anfds [fd].reify || fdchangecnt < 0)	477	if (expect_false (anfds [fd].reify))
339	return;	478	return;
340		479
341	anfds [fd].reify = 1;	480	anfds [fd].reify = 1;
342		481
343	++fdchangecnt;	482	++fdchangecnt;
344	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	483	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
345	fdchanges [fdchangecnt - 1] = fd;	484	fdchanges [fdchangecnt - 1] = fd;
346	}	485	}
347		486
348	static void	487	static void
349	fd_kill (EV_P_ int fd)	488	fd_kill (EV_P_ int fd)
350	{	489	{
351	struct ev_io *w;	490	ev_io *w;
352		491
353	while ((w = (struct ev_io *)anfds [fd].head))	492	while ((w = (ev_io *)anfds [fd].head))
354	{	493	{
355	ev_io_stop (EV_A_ w);	494	ev_io_stop (EV_A_ w);
356	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	495	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
357	}	496	}
		497	}
		498
		499	inline int
		500	fd_valid (int fd)
		501	{
		502	#ifdef _WIN32
		503	return _get_osfhandle (fd) != -1;
		504	#else
		505	return fcntl (fd, F_GETFD) != -1;
		506	#endif
358	}	507	}
359		508
360	/* called on EBADF to verify fds */	509	/* called on EBADF to verify fds */
361	static void	510	static void
362	fd_ebadf (EV_P)	511	fd_ebadf (EV_P)
363	{	512	{
364	int fd;	513	int fd;
365		514
366	for (fd = 0; fd < anfdmax; ++fd)	515	for (fd = 0; fd < anfdmax; ++fd)
367	if (anfds [fd].events)	516	if (anfds [fd].events)
368	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	517	if (!fd_valid (fd) == -1 && errno == EBADF)
369	fd_kill (EV_A_ fd);	518	fd_kill (EV_A_ fd);
370	}	519	}
371		520
372	/* called on ENOMEM in select/poll to kill some fds and retry */	521	/* called on ENOMEM in select/poll to kill some fds and retry */
373	static void	522	static void
…		…
376	int fd;	525	int fd;
377		526
378	for (fd = anfdmax; fd--; )	527	for (fd = anfdmax; fd--; )
379	if (anfds [fd].events)	528	if (anfds [fd].events)
380	{	529	{
381	close (fd);
382	fd_kill (EV_A_ fd);	530	fd_kill (EV_A_ fd);
383	return;	531	return;
384	}	532	}
385	}	533	}
386		534
387	/* susually called after fork if method needs to re-arm all fds from scratch */	535	/* usually called after fork if backend needs to re-arm all fds from scratch */
388	static void	536	static void
389	fd_rearm_all (EV_P)	537	fd_rearm_all (EV_P)
390	{	538	{
391	int fd;	539	int fd;
392		540
…		…
440		588
441	heap [k] = w;	589	heap [k] = w;
442	((W)heap [k])->active = k + 1;	590	((W)heap [k])->active = k + 1;
443	}	591	}
444		592
		593	inline void
		594	adjustheap (WT *heap, int N, int k)
		595	{
		596	upheap (heap, k);
		597	downheap (heap, N, k);
		598	}
		599
445	/*****************************************************************************/	600	/*****************************************************************************/
446		601
447	typedef struct	602	typedef struct
448	{	603	{
449	struct ev_watcher_list *head;	604	WL head;
450	sig_atomic_t volatile gotsig;	605	sig_atomic_t volatile gotsig;
451	} ANSIG;	606	} ANSIG;
452		607
453	static ANSIG *signals;	608	static ANSIG *signals;
454	static int signalmax;	609	static int signalmax;
455		610
456	static int sigpipe [2];	611	static int sigpipe [2];
457	static sig_atomic_t volatile gotsig;	612	static sig_atomic_t volatile gotsig;
458	static struct ev_io sigev;	613	static ev_io sigev;
459		614
460	static void	615	static void
461	signals_init (ANSIG *base, int count)	616	signals_init (ANSIG *base, int count)
462	{	617	{
463	while (count--)	618	while (count--)
…		…
470	}	625	}
471		626
472	static void	627	static void
473	sighandler (int signum)	628	sighandler (int signum)
474	{	629	{
475	#if WIN32	630	#if _WIN32
476	signal (signum, sighandler);	631	signal (signum, sighandler);
477	#endif	632	#endif
478		633
479	signals [signum - 1].gotsig = 1;	634	signals [signum - 1].gotsig = 1;
480		635
…		…
485	write (sigpipe [1], &signum, 1);	640	write (sigpipe [1], &signum, 1);
486	errno = old_errno;	641	errno = old_errno;
487	}	642	}
488	}	643	}
489		644
		645	void
		646	ev_feed_signal_event (EV_P_ int signum)
		647	{
		648	WL w;
		649
		650	#if EV_MULTIPLICITY
		651	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		652	#endif
		653
		654	--signum;
		655
		656	if (signum < 0 || signum >= signalmax)
		657	return;
		658
		659	signals [signum].gotsig = 0;
		660
		661	for (w = signals [signum].head; w; w = w->next)
		662	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		663	}
		664
490	static void	665	static void
491	sigcb (EV_P_ struct ev_io *iow, int revents)	666	sigcb (EV_P_ ev_io *iow, int revents)
492	{	667	{
493	struct ev_watcher_list *w;
494	int signum;	668	int signum;
495		669
496	read (sigpipe [0], &revents, 1);	670	read (sigpipe [0], &revents, 1);
497	gotsig = 0;	671	gotsig = 0;
498		672
499	for (signum = signalmax; signum--; )	673	for (signum = signalmax; signum--; )
500	if (signals [signum].gotsig)	674	if (signals [signum].gotsig)
501	{	675	ev_feed_signal_event (EV_A_ signum + 1);
502	signals [signum].gotsig = 0;	676	}
503		677
504	for (w = signals [signum].head; w; w = w->next)	678	static void
505	event (EV_A_ (W)w, EV_SIGNAL);	679	fd_intern (int fd)
506	}	680	{
		681	#ifdef _WIN32
		682	int arg = 1;
		683	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		684	#else
		685	fcntl (fd, F_SETFD, FD_CLOEXEC);
		686	fcntl (fd, F_SETFL, O_NONBLOCK);
		687	#endif
507	}	688	}
508		689
509	static void	690	static void
510	siginit (EV_P)	691	siginit (EV_P)
511	{	692	{
512	#ifndef WIN32	693	fd_intern (sigpipe [0]);
513	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	694	fd_intern (sigpipe [1]);
514	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
515
516	/* rather than sort out wether we really need nb, set it */
517	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
518	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
519	#endif
520		695
521	ev_io_set (&sigev, sigpipe [0], EV_READ);	696	ev_io_set (&sigev, sigpipe [0], EV_READ);
522	ev_io_start (EV_A_ &sigev);	697	ev_io_start (EV_A_ &sigev);
523	ev_unref (EV_A); /* child watcher should not keep loop alive */	698	ev_unref (EV_A); /* child watcher should not keep loop alive */
524	}	699	}
525		700
526	/*****************************************************************************/	701	/*****************************************************************************/
527		702
		703	static ev_child *childs [PID_HASHSIZE];
		704
528	#ifndef WIN32	705	#ifndef _WIN32
529		706
530	static struct ev_child *childs [PID_HASHSIZE];
531	static struct ev_signal childev;	707	static ev_signal childev;
532		708
533	#ifndef WCONTINUED	709	#ifndef WCONTINUED
534	# define WCONTINUED 0	710	# define WCONTINUED 0
535	#endif	711	#endif
536		712
537	static void	713	static void
538	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)	714	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
539	{	715	{
540	struct ev_child *w;	716	ev_child *w;
541		717
542	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)	718	for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
543	if (w->pid == pid || !w->pid)	719	if (w->pid == pid || !w->pid)
544	{	720	{
545	ev_priority (w) = ev_priority (sw); /* need to do it *now* */	721	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
546	w->rpid = pid;	722	w->rpid = pid;
547	w->rstatus = status;	723	w->rstatus = status;
548	event (EV_A_ (W)w, EV_CHILD);	724	ev_feed_event (EV_A_ (W)w, EV_CHILD);
549	}	725	}
550	}	726	}
551		727
552	static void	728	static void
553	childcb (EV_P_ struct ev_signal *sw, int revents)	729	childcb (EV_P_ ev_signal *sw, int revents)
554	{	730	{
555	int pid, status;	731	int pid, status;
556		732
557	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	733	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
558	{	734	{
559	/* make sure we are called again until all childs have been reaped */	735	/* make sure we are called again until all childs have been reaped */
		736	/* we need to do it this way so that the callback gets called before we continue */
560	event (EV_A_ (W)sw, EV_SIGNAL);	737	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
561		738
562	child_reap (EV_A_ sw, pid, pid, status);	739	child_reap (EV_A_ sw, pid, pid, status);
563	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	740	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
564	}	741	}
565	}	742	}
566		743
567	#endif	744	#endif
568		745
569	/*****************************************************************************/	746	/*****************************************************************************/
570		747
		748	#if EV_USE_PORT
		749	# include "ev_port.c"
		750	#endif
571	#if EV_USE_KQUEUE	751	#if EV_USE_KQUEUE
572	# include "ev_kqueue.c"	752	# include "ev_kqueue.c"
573	#endif	753	#endif
574	#if EV_USE_EPOLL	754	#if EV_USE_EPOLL
575	# include "ev_epoll.c"	755	# include "ev_epoll.c"
…		…
595		775
596	/* return true if we are running with elevated privileges and should ignore env variables */	776	/* return true if we are running with elevated privileges and should ignore env variables */
597	static int	777	static int
598	enable_secure (void)	778	enable_secure (void)
599	{	779	{
600	#ifdef WIN32	780	#ifdef _WIN32
601	return 0;	781	return 0;
602	#else	782	#else
603	return getuid () != geteuid ()	783	return getuid () != geteuid ()
604	|| getgid () != getegid ();	784	|| getgid () != getegid ();
605	#endif	785	#endif
606	}	786	}
607		787
608	int	788	unsigned int
609	ev_method (EV_P)	789	ev_supported_backends (void)
610	{	790	{
611	return method;	791	unsigned int flags = 0;
612	}
613		792
614	static void	793	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
615	loop_init (EV_P_ int methods)	794	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		795	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		796	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		797	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		798
		799	return flags;
		800	}
		801
		802	unsigned int
		803	ev_recommended_backends (void)
616	{	804	{
617	if (!method)	805	unsigned int flags = ev_supported_backends ();
		806
		807	#ifndef __NetBSD__
		808	/* kqueue is borked on everything but netbsd apparently */
		809	/* it usually doesn't work correctly on anything but sockets and pipes */
		810	flags &= ~EVBACKEND_KQUEUE;
		811	#endif
		812	#ifdef __APPLE__
		813	// flags &= ~EVBACKEND_KQUEUE; for documentation
		814	flags &= ~EVBACKEND_POLL;
		815	#endif
		816
		817	return flags;
		818	}
		819
		820	unsigned int
		821	ev_embeddable_backends (void)
		822	{
		823	return EVBACKEND_EPOLL
		824	| EVBACKEND_KQUEUE
		825	| EVBACKEND_PORT;
		826	}
		827
		828	unsigned int
		829	ev_backend (EV_P)
		830	{
		831	return backend;
		832	}
		833
		834	static void
		835	loop_init (EV_P_ unsigned int flags)
		836	{
		837	if (!backend)
618	{	838	{
619	#if EV_USE_MONOTONIC	839	#if EV_USE_MONOTONIC
620	{	840	{
621	struct timespec ts;	841	struct timespec ts;
622	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	842	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
623	have_monotonic = 1;	843	have_monotonic = 1;
624	}	844	}
625	#endif	845	#endif
626		846
627	rt_now = ev_time ();	847	ev_rt_now = ev_time ();
628	mn_now = get_clock ();	848	mn_now = get_clock ();
629	now_floor = mn_now;	849	now_floor = mn_now;
630	rtmn_diff = rt_now - mn_now;	850	rtmn_diff = ev_rt_now - mn_now;
631		851
632	if (methods == EVMETHOD_AUTO)	852	if (!(flags & EVFLAG_NOENV)
633	if (!enable_secure () && getenv ("LIBEV_METHODS"))	853	&& !enable_secure ()
		854	&& getenv ("LIBEV_FLAGS"))
634	methods = atoi (getenv ("LIBEV_METHODS"));	855	flags = atoi (getenv ("LIBEV_FLAGS"));
635	else
636	methods = EVMETHOD_ANY;
637		856
638	method = 0;	857	if (!(flags & 0x0000ffffUL))
639	#if EV_USE_WIN32	858	flags |= ev_recommended_backends ();
640	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);	859
		860	backend = 0;
		861	#if EV_USE_PORT
		862	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
641	#endif	863	#endif
642	#if EV_USE_KQUEUE	864	#if EV_USE_KQUEUE
643	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);	865	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
644	#endif	866	#endif
645	#if EV_USE_EPOLL	867	#if EV_USE_EPOLL
646	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);	868	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
647	#endif	869	#endif
648	#if EV_USE_POLL	870	#if EV_USE_POLL
649	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);	871	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
650	#endif	872	#endif
651	#if EV_USE_SELECT	873	#if EV_USE_SELECT
652	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);	874	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
653	#endif	875	#endif
654	}
655	}
656		876
657	void	877	ev_init (&sigev, sigcb);
		878	ev_set_priority (&sigev, EV_MAXPRI);
		879	}
		880	}
		881
		882	static void
658	loop_destroy (EV_P)	883	loop_destroy (EV_P)
659	{	884	{
660	int i;	885	int i;
661		886
662	#if EV_USE_WIN32	887	#if EV_USE_PORT
663	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);	888	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
664	#endif	889	#endif
665	#if EV_USE_KQUEUE	890	#if EV_USE_KQUEUE
666	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);	891	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
667	#endif	892	#endif
668	#if EV_USE_EPOLL	893	#if EV_USE_EPOLL
669	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);	894	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
670	#endif	895	#endif
671	#if EV_USE_POLL	896	#if EV_USE_POLL
672	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);	897	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
673	#endif	898	#endif
674	#if EV_USE_SELECT	899	#if EV_USE_SELECT
675	if (method == EVMETHOD_SELECT) select_destroy (EV_A);	900	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
676	#endif	901	#endif
677		902
678	for (i = NUMPRI; i--; )	903	for (i = NUMPRI; i--; )
679	array_free (pending, [i]);	904	array_free (pending, [i]);
680		905
		906	/* have to use the microsoft-never-gets-it-right macro */
681	array_free (fdchange, );	907	array_free (fdchange, EMPTY0);
682	array_free (timer, );	908	array_free (timer, EMPTY0);
		909	#if EV_PERIODICS
683	array_free (periodic, );	910	array_free (periodic, EMPTY0);
		911	#endif
684	array_free (idle, );	912	array_free (idle, EMPTY0);
685	array_free (prepare, );	913	array_free (prepare, EMPTY0);
686	array_free (check, );	914	array_free (check, EMPTY0);
687		915
688	method = 0;	916	backend = 0;
689	/*TODO*/
690	}	917	}
691		918
692	void	919	static void
693	loop_fork (EV_P)	920	loop_fork (EV_P)
694	{	921	{
695	/*TODO*/	922	#if EV_USE_PORT
		923	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		924	#endif
		925	#if EV_USE_KQUEUE
		926	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		927	#endif
696	#if EV_USE_EPOLL	928	#if EV_USE_EPOLL
697	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);	929	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
698	#endif	930	#endif
699	#if EV_USE_KQUEUE	931
700	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);	932	if (ev_is_active (&sigev))
701	#endif	933	{
		934	/* default loop */
		935
		936	ev_ref (EV_A);
		937	ev_io_stop (EV_A_ &sigev);
		938	close (sigpipe [0]);
		939	close (sigpipe [1]);
		940
		941	while (pipe (sigpipe))
		942	syserr ("(libev) error creating pipe");
		943
		944	siginit (EV_A);
		945	}
		946
		947	postfork = 0;
702	}	948	}
703		949
704	#if EV_MULTIPLICITY	950	#if EV_MULTIPLICITY
705	struct ev_loop *	951	struct ev_loop *
706	ev_loop_new (int methods)	952	ev_loop_new (unsigned int flags)
707	{	953	{
708	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));	954	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
709		955
		956	memset (loop, 0, sizeof (struct ev_loop));
		957
710	loop_init (EV_A_ methods);	958	loop_init (EV_A_ flags);
711		959
712	if (ev_method (EV_A))	960	if (ev_backend (EV_A))
713	return loop;	961	return loop;
714		962
715	return 0;	963	return 0;
716	}	964	}
717		965
718	void	966	void
719	ev_loop_destroy (EV_P)	967	ev_loop_destroy (EV_P)
720	{	968	{
721	loop_destroy (EV_A);	969	loop_destroy (EV_A);
722	free (loop);	970	ev_free (loop);
723	}	971	}
724		972
725	void	973	void
726	ev_loop_fork (EV_P)	974	ev_loop_fork (EV_P)
727	{	975	{
728	loop_fork (EV_A);	976	postfork = 1;
729	}	977	}
730		978
731	#endif	979	#endif
732		980
733	#if EV_MULTIPLICITY	981	#if EV_MULTIPLICITY
734	struct ev_loop default_loop_struct;
735	static struct ev_loop *default_loop;
736
737	struct ev_loop *	982	struct ev_loop *
		983	ev_default_loop_init (unsigned int flags)
738	#else	984	#else
739	static int default_loop;
740
741	int	985	int
		986	ev_default_loop (unsigned int flags)
742	#endif	987	#endif
743	ev_default_loop (int methods)
744	{	988	{
745	if (sigpipe [0] == sigpipe [1])	989	if (sigpipe [0] == sigpipe [1])
746	if (pipe (sigpipe))	990	if (pipe (sigpipe))
747	return 0;	991	return 0;
748		992
749	if (!default_loop)	993	if (!ev_default_loop_ptr)
750	{	994	{
751	#if EV_MULTIPLICITY	995	#if EV_MULTIPLICITY
752	struct ev_loop *loop = default_loop = &default_loop_struct;	996	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
753	#else	997	#else
754	default_loop = 1;	998	ev_default_loop_ptr = 1;
755	#endif	999	#endif
756		1000
757	loop_init (EV_A_ methods);	1001	loop_init (EV_A_ flags);
758		1002
759	if (ev_method (EV_A))	1003	if (ev_backend (EV_A))
760	{	1004	{
761	ev_watcher_init (&sigev, sigcb);
762	ev_set_priority (&sigev, EV_MAXPRI);
763	siginit (EV_A);	1005	siginit (EV_A);
764		1006
765	#ifndef WIN32	1007	#ifndef _WIN32
766	ev_signal_init (&childev, childcb, SIGCHLD);	1008	ev_signal_init (&childev, childcb, SIGCHLD);
767	ev_set_priority (&childev, EV_MAXPRI);	1009	ev_set_priority (&childev, EV_MAXPRI);
768	ev_signal_start (EV_A_ &childev);	1010	ev_signal_start (EV_A_ &childev);
769	ev_unref (EV_A); /* child watcher should not keep loop alive */	1011	ev_unref (EV_A); /* child watcher should not keep loop alive */
770	#endif	1012	#endif
771	}	1013	}
772	else	1014	else
773	default_loop = 0;	1015	ev_default_loop_ptr = 0;
774	}	1016	}
775		1017
776	return default_loop;	1018	return ev_default_loop_ptr;
777	}	1019	}
778		1020
779	void	1021	void
780	ev_default_destroy (void)	1022	ev_default_destroy (void)
781	{	1023	{
782	#if EV_MULTIPLICITY	1024	#if EV_MULTIPLICITY
783	struct ev_loop *loop = default_loop;	1025	struct ev_loop *loop = ev_default_loop_ptr;
784	#endif	1026	#endif
785		1027
		1028	#ifndef _WIN32
786	ev_ref (EV_A); /* child watcher */	1029	ev_ref (EV_A); /* child watcher */
787	ev_signal_stop (EV_A_ &childev);	1030	ev_signal_stop (EV_A_ &childev);
		1031	#endif
788		1032
789	ev_ref (EV_A); /* signal watcher */	1033	ev_ref (EV_A); /* signal watcher */
790	ev_io_stop (EV_A_ &sigev);	1034	ev_io_stop (EV_A_ &sigev);
791		1035
792	close (sigpipe [0]); sigpipe [0] = 0;	1036	close (sigpipe [0]); sigpipe [0] = 0;
…		…
797		1041
798	void	1042	void
799	ev_default_fork (void)	1043	ev_default_fork (void)
800	{	1044	{
801	#if EV_MULTIPLICITY	1045	#if EV_MULTIPLICITY
802	struct ev_loop *loop = default_loop;	1046	struct ev_loop *loop = ev_default_loop_ptr;
803	#endif	1047	#endif
804		1048
805	loop_fork (EV_A);	1049	if (backend)
806		1050	postfork = 1;
807	ev_io_stop (EV_A_ &sigev);
808	close (sigpipe [0]);
809	close (sigpipe [1]);
810	pipe (sigpipe);
811
812	ev_ref (EV_A); /* signal watcher */
813	siginit (EV_A);
814	}	1051	}
815		1052
816	/*****************************************************************************/	1053	/*****************************************************************************/
817		1054
818	static void	1055	static int
		1056	any_pending (EV_P)
		1057	{
		1058	int pri;
		1059
		1060	for (pri = NUMPRI; pri--; )
		1061	if (pendingcnt [pri])
		1062	return 1;
		1063
		1064	return 0;
		1065	}
		1066
		1067	inline void
819	call_pending (EV_P)	1068	call_pending (EV_P)
820	{	1069	{
821	int pri;	1070	int pri;
822		1071
823	for (pri = NUMPRI; pri--; )	1072	for (pri = NUMPRI; pri--; )
824	while (pendingcnt [pri])	1073	while (pendingcnt [pri])
825	{	1074	{
826	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1075	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
827		1076
828	if (p->w)	1077	if (expect_true (p->w))
829	{	1078	{
830	p->w->pending = 0;	1079	p->w->pending = 0;
831	p->w->cb (EV_A_ p->w, p->events);	1080	EV_CB_INVOKE (p->w, p->events);
832	}	1081	}
833	}	1082	}
834	}	1083	}
835		1084
836	static void	1085	inline void
837	timers_reify (EV_P)	1086	timers_reify (EV_P)
838	{	1087	{
839	while (timercnt && ((WT)timers [0])->at <= mn_now)	1088	while (timercnt && ((WT)timers [0])->at <= mn_now)
840	{	1089	{
841	struct ev_timer *w = timers [0];	1090	ev_timer *w = timers [0];
842		1091
843	assert (("inactive timer on timer heap detected", ev_is_active (w)));	1092	assert (("inactive timer on timer heap detected", ev_is_active (w)));
844		1093
845	/* first reschedule or stop timer */	1094	/* first reschedule or stop timer */
846	if (w->repeat)	1095	if (w->repeat)
847	{	1096	{
848	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1097	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1098
849	((WT)w)->at = mn_now + w->repeat;	1099	((WT)w)->at += w->repeat;
		1100	if (((WT)w)->at < mn_now)
		1101	((WT)w)->at = mn_now;
		1102
850	downheap ((WT *)timers, timercnt, 0);	1103	downheap ((WT *)timers, timercnt, 0);
851	}	1104	}
852	else	1105	else
853	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1106	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
854		1107
855	event (EV_A_ (W)w, EV_TIMEOUT);	1108	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
856	}	1109	}
857	}	1110	}
858		1111
859	static void	1112	#if EV_PERIODICS
		1113	inline void
860	periodics_reify (EV_P)	1114	periodics_reify (EV_P)
861	{	1115	{
862	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)	1116	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
863	{	1117	{
864	struct ev_periodic *w = periodics [0];	1118	ev_periodic *w = periodics [0];
865		1119
866	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	1120	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
867		1121
868	/* first reschedule or stop timer */	1122	/* first reschedule or stop timer */
869	if (w->interval)	1123	if (w->reschedule_cb)
870	{	1124	{
		1125	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1126	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1127	downheap ((WT *)periodics, periodiccnt, 0);
		1128	}
		1129	else if (w->interval)
		1130	{
871	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;	1131	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
872	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));	1132	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
873	downheap ((WT *)periodics, periodiccnt, 0);	1133	downheap ((WT *)periodics, periodiccnt, 0);
874	}	1134	}
875	else	1135	else
876	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1136	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
877		1137
878	event (EV_A_ (W)w, EV_PERIODIC);	1138	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
879	}	1139	}
880	}	1140	}
881		1141
882	static void	1142	static void
883	periodics_reschedule (EV_P)	1143	periodics_reschedule (EV_P)
…		…
885	int i;	1145	int i;
886		1146
887	/* adjust periodics after time jump */	1147	/* adjust periodics after time jump */
888	for (i = 0; i < periodiccnt; ++i)	1148	for (i = 0; i < periodiccnt; ++i)
889	{	1149	{
890	struct ev_periodic *w = periodics [i];	1150	ev_periodic *w = periodics [i];
891		1151
		1152	if (w->reschedule_cb)
		1153	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
892	if (w->interval)	1154	else if (w->interval)
893	{
894	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;	1155	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
895
896	if (fabs (diff) >= 1e-4)
897	{
898	ev_periodic_stop (EV_A_ w);
899	ev_periodic_start (EV_A_ w);
900
901	i = 0; /* restart loop, inefficient, but time jumps should be rare */
902	}
903	}
904	}	1156	}
		1157
		1158	/* now rebuild the heap */
		1159	for (i = periodiccnt >> 1; i--; )
		1160	downheap ((WT *)periodics, periodiccnt, i);
905	}	1161	}
		1162	#endif
906		1163
907	inline int	1164	inline int
908	time_update_monotonic (EV_P)	1165	time_update_monotonic (EV_P)
909	{	1166	{
910	mn_now = get_clock ();	1167	mn_now = get_clock ();
911		1168
912	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1169	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
913	{	1170	{
914	rt_now = rtmn_diff + mn_now;	1171	ev_rt_now = rtmn_diff + mn_now;
915	return 0;	1172	return 0;
916	}	1173	}
917	else	1174	else
918	{	1175	{
919	now_floor = mn_now;	1176	now_floor = mn_now;
920	rt_now = ev_time ();	1177	ev_rt_now = ev_time ();
921	return 1;	1178	return 1;
922	}	1179	}
923	}	1180	}
924		1181
925	static void	1182	inline void
926	time_update (EV_P)	1183	time_update (EV_P)
927	{	1184	{
928	int i;	1185	int i;
929		1186
930	#if EV_USE_MONOTONIC	1187	#if EV_USE_MONOTONIC
…		…
934	{	1191	{
935	ev_tstamp odiff = rtmn_diff;	1192	ev_tstamp odiff = rtmn_diff;
936		1193
937	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1194	for (i = 4; --i; ) /* loop a few times, before making important decisions */
938	{	1195	{
939	rtmn_diff = rt_now - mn_now;	1196	rtmn_diff = ev_rt_now - mn_now;
940		1197
941	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1198	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
942	return; /* all is well */	1199	return; /* all is well */
943		1200
944	rt_now = ev_time ();	1201	ev_rt_now = ev_time ();
945	mn_now = get_clock ();	1202	mn_now = get_clock ();
946	now_floor = mn_now;	1203	now_floor = mn_now;
947	}	1204	}
948		1205
		1206	# if EV_PERIODICS
949	periodics_reschedule (EV_A);	1207	periodics_reschedule (EV_A);
		1208	# endif
950	/* no timer adjustment, as the monotonic clock doesn't jump */	1209	/* no timer adjustment, as the monotonic clock doesn't jump */
951	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */	1210	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
952	}	1211	}
953	}	1212	}
954	else	1213	else
955	#endif	1214	#endif
956	{	1215	{
957	rt_now = ev_time ();	1216	ev_rt_now = ev_time ();
958		1217
959	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1218	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
960	{	1219	{
		1220	#if EV_PERIODICS
961	periodics_reschedule (EV_A);	1221	periodics_reschedule (EV_A);
		1222	#endif
962		1223
963	/* adjust timers. this is easy, as the offset is the same for all */	1224	/* adjust timers. this is easy, as the offset is the same for all */
964	for (i = 0; i < timercnt; ++i)	1225	for (i = 0; i < timercnt; ++i)
965	((WT)timers [i])->at += rt_now - mn_now;	1226	((WT)timers [i])->at += ev_rt_now - mn_now;
966	}	1227	}
967		1228
968	mn_now = rt_now;	1229	mn_now = ev_rt_now;
969	}	1230	}
970	}	1231	}
971		1232
972	void	1233	void
973	ev_ref (EV_P)	1234	ev_ref (EV_P)
…		…
984	static int loop_done;	1245	static int loop_done;
985		1246
986	void	1247	void
987	ev_loop (EV_P_ int flags)	1248	ev_loop (EV_P_ int flags)
988	{	1249	{
989	double block;
990	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1250	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1251	? EVUNLOOP_ONE
		1252	: EVUNLOOP_CANCEL;
991		1253
992	do	1254	while (activecnt)
993	{	1255	{
994	/* queue check watchers (and execute them) */	1256	/* queue check watchers (and execute them) */
995	if (expect_false (preparecnt))	1257	if (expect_false (preparecnt))
996	{	1258	{
997	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1259	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
998	call_pending (EV_A);	1260	call_pending (EV_A);
999	}	1261	}
1000		1262
		1263	/* we might have forked, so reify kernel state if necessary */
		1264	if (expect_false (postfork))
		1265	loop_fork (EV_A);
		1266
1001	/* update fd-related kernel structures */	1267	/* update fd-related kernel structures */
1002	fd_reify (EV_A);	1268	fd_reify (EV_A);
1003		1269
1004	/* calculate blocking time */	1270	/* calculate blocking time */
		1271	{
		1272	double block;
1005		1273
1006	/* we only need this for !monotonic clockor timers, but as we basically	1274	if (flags & EVLOOP_NONBLOCK || idlecnt)
1007	always have timers, we just calculate it always */	1275	block = 0.; /* do not block at all */
		1276	else
		1277	{
		1278	/* update time to cancel out callback processing overhead */
1008	#if EV_USE_MONOTONIC	1279	#if EV_USE_MONOTONIC
1009	if (expect_true (have_monotonic))	1280	if (expect_true (have_monotonic))
1010	time_update_monotonic (EV_A);	1281	time_update_monotonic (EV_A);
1011	else	1282	else
1012	#endif	1283	#endif
1013	{	1284	{
1014	rt_now = ev_time ();	1285	ev_rt_now = ev_time ();
1015	mn_now = rt_now;	1286	mn_now = ev_rt_now;
1016	}	1287	}
1017		1288
1018	if (flags & EVLOOP_NONBLOCK || idlecnt)
1019	block = 0.;
1020	else
1021	{
1022	block = MAX_BLOCKTIME;	1289	block = MAX_BLOCKTIME;
1023		1290
1024	if (timercnt)	1291	if (timercnt)
1025	{	1292	{
1026	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;	1293	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
1027	if (block > to) block = to;	1294	if (block > to) block = to;
1028	}	1295	}
1029		1296
		1297	#if EV_PERIODICS
1030	if (periodiccnt)	1298	if (periodiccnt)
1031	{	1299	{
1032	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;	1300	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
1033	if (block > to) block = to;	1301	if (block > to) block = to;
1034	}	1302	}
		1303	#endif
1035		1304
1036	if (block < 0.) block = 0.;	1305	if (expect_false (block < 0.)) block = 0.;
1037	}	1306	}
1038		1307
1039	method_poll (EV_A_ block);	1308	backend_poll (EV_A_ block);
		1309	}
1040		1310
1041	/* update rt_now, do magic */	1311	/* update ev_rt_now, do magic */
1042	time_update (EV_A);	1312	time_update (EV_A);
1043		1313
1044	/* queue pending timers and reschedule them */	1314	/* queue pending timers and reschedule them */
1045	timers_reify (EV_A); /* relative timers called last */	1315	timers_reify (EV_A); /* relative timers called last */
		1316	#if EV_PERIODICS
1046	periodics_reify (EV_A); /* absolute timers called first */	1317	periodics_reify (EV_A); /* absolute timers called first */
		1318	#endif
1047		1319
1048	/* queue idle watchers unless io or timers are pending */	1320	/* queue idle watchers unless other events are pending */
1049	if (!pendingcnt)	1321	if (idlecnt && !any_pending (EV_A))
1050	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	1322	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
1051		1323
1052	/* queue check watchers, to be executed first */	1324	/* queue check watchers, to be executed first */
1053	if (checkcnt)	1325	if (expect_false (checkcnt))
1054	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1326	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1055		1327
1056	call_pending (EV_A);	1328	call_pending (EV_A);
1057	}
1058	while (activecnt && !loop_done);
1059		1329
1060	if (loop_done != 2)	1330	if (expect_false (loop_done))
1061	loop_done = 0;	1331	break;
		1332	}
		1333
		1334	if (loop_done == EVUNLOOP_ONE)
		1335	loop_done = EVUNLOOP_CANCEL;
1062	}	1336	}
1063		1337
1064	void	1338	void
1065	ev_unloop (EV_P_ int how)	1339	ev_unloop (EV_P_ int how)
1066	{	1340	{
…		…
1119	}	1393	}
1120		1394
1121	/*****************************************************************************/	1395	/*****************************************************************************/
1122		1396
1123	void	1397	void
1124	ev_io_start (EV_P_ struct ev_io *w)	1398	ev_io_start (EV_P_ ev_io *w)
1125	{	1399	{
1126	int fd = w->fd;	1400	int fd = w->fd;
1127		1401
1128	if (ev_is_active (w))	1402	if (expect_false (ev_is_active (w)))
1129	return;	1403	return;
1130		1404
1131	assert (("ev_io_start called with negative fd", fd >= 0));	1405	assert (("ev_io_start called with negative fd", fd >= 0));
1132		1406
1133	ev_start (EV_A_ (W)w, 1);	1407	ev_start (EV_A_ (W)w, 1);
1134	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1408	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1135	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1409	wlist_add ((WL *)&anfds[fd].head, (WL)w);
1136		1410
1137	fd_change (EV_A_ fd);	1411	fd_change (EV_A_ fd);
1138	}	1412	}
1139		1413
1140	void	1414	void
1141	ev_io_stop (EV_P_ struct ev_io *w)	1415	ev_io_stop (EV_P_ ev_io *w)
1142	{	1416	{
1143	ev_clear_pending (EV_A_ (W)w);	1417	ev_clear_pending (EV_A_ (W)w);
1144	if (!ev_is_active (w))	1418	if (expect_false (!ev_is_active (w)))
1145	return;	1419	return;
		1420
		1421	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1146		1422
1147	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1423	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
1148	ev_stop (EV_A_ (W)w);	1424	ev_stop (EV_A_ (W)w);
1149		1425
1150	fd_change (EV_A_ w->fd);	1426	fd_change (EV_A_ w->fd);
1151	}	1427	}
1152		1428
1153	void	1429	void
1154	ev_timer_start (EV_P_ struct ev_timer *w)	1430	ev_timer_start (EV_P_ ev_timer *w)
1155	{	1431	{
1156	if (ev_is_active (w))	1432	if (expect_false (ev_is_active (w)))
1157	return;	1433	return;
1158		1434
1159	((WT)w)->at += mn_now;	1435	((WT)w)->at += mn_now;
1160		1436
1161	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.));
1162		1438
1163	ev_start (EV_A_ (W)w, ++timercnt);	1439	ev_start (EV_A_ (W)w, ++timercnt);
1164	array_needsize (timers, timermax, timercnt, );	1440	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
1165	timers [timercnt - 1] = w;	1441	timers [timercnt - 1] = w;
1166	upheap ((WT *)timers, timercnt - 1);	1442	upheap ((WT *)timers, timercnt - 1);
1167		1443
1168	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	1444	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1169	}	1445	}
1170		1446
1171	void	1447	void
1172	ev_timer_stop (EV_P_ struct ev_timer *w)	1448	ev_timer_stop (EV_P_ ev_timer *w)
1173	{	1449	{
1174	ev_clear_pending (EV_A_ (W)w);	1450	ev_clear_pending (EV_A_ (W)w);
1175	if (!ev_is_active (w))	1451	if (expect_false (!ev_is_active (w)))
1176	return;	1452	return;
1177		1453
1178	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	1454	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1179		1455
1180	if (((W)w)->active < timercnt--)	1456	if (expect_true (((W)w)->active < timercnt--))
1181	{	1457	{
1182	timers [((W)w)->active - 1] = timers [timercnt];	1458	timers [((W)w)->active - 1] = timers [timercnt];
1183	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);	1459	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1184	}	1460	}
1185		1461
1186	((WT)w)->at = w->repeat;	1462	((WT)w)->at -= mn_now;
1187		1463
1188	ev_stop (EV_A_ (W)w);	1464	ev_stop (EV_A_ (W)w);
1189	}	1465	}
1190		1466
1191	void	1467	void
1192	ev_timer_again (EV_P_ struct ev_timer *w)	1468	ev_timer_again (EV_P_ ev_timer *w)
1193	{	1469	{
1194	if (ev_is_active (w))	1470	if (ev_is_active (w))
1195	{	1471	{
1196	if (w->repeat)	1472	if (w->repeat)
1197	{	1473	{
1198	((WT)w)->at = mn_now + w->repeat;	1474	((WT)w)->at = mn_now + w->repeat;
1199	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);	1475	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1200	}	1476	}
1201	else	1477	else
1202	ev_timer_stop (EV_A_ w);	1478	ev_timer_stop (EV_A_ w);
1203	}	1479	}
1204	else if (w->repeat)	1480	else if (w->repeat)
		1481	{
		1482	w->at = w->repeat;
1205	ev_timer_start (EV_A_ w);	1483	ev_timer_start (EV_A_ w);
		1484	}
1206	}	1485	}
1207		1486
		1487	#if EV_PERIODICS
1208	void	1488	void
1209	ev_periodic_start (EV_P_ struct ev_periodic *w)	1489	ev_periodic_start (EV_P_ ev_periodic *w)
1210	{	1490	{
1211	if (ev_is_active (w))	1491	if (expect_false (ev_is_active (w)))
1212	return;	1492	return;
1213		1493
		1494	if (w->reschedule_cb)
		1495	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1496	else if (w->interval)
		1497	{
1214	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.));
1215
1216	/* 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 */
1217	if (w->interval)
1218	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;	1500	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1501	}
1219		1502
1220	ev_start (EV_A_ (W)w, ++periodiccnt);	1503	ev_start (EV_A_ (W)w, ++periodiccnt);
1221	array_needsize (periodics, periodicmax, periodiccnt, );	1504	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
1222	periodics [periodiccnt - 1] = w;	1505	periodics [periodiccnt - 1] = w;
1223	upheap ((WT *)periodics, periodiccnt - 1);	1506	upheap ((WT *)periodics, periodiccnt - 1);
1224		1507
1225	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	1508	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1226	}	1509	}
1227		1510
1228	void	1511	void
1229	ev_periodic_stop (EV_P_ struct ev_periodic *w)	1512	ev_periodic_stop (EV_P_ ev_periodic *w)
1230	{	1513	{
1231	ev_clear_pending (EV_A_ (W)w);	1514	ev_clear_pending (EV_A_ (W)w);
1232	if (!ev_is_active (w))	1515	if (expect_false (!ev_is_active (w)))
1233	return;	1516	return;
1234		1517
1235	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	1518	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1236		1519
1237	if (((W)w)->active < periodiccnt--)	1520	if (expect_true (((W)w)->active < periodiccnt--))
1238	{	1521	{
1239	periodics [((W)w)->active - 1] = periodics [periodiccnt];	1522	periodics [((W)w)->active - 1] = periodics [periodiccnt];
1240	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	1523	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
1241	}	1524	}
1242		1525
1243	ev_stop (EV_A_ (W)w);	1526	ev_stop (EV_A_ (W)w);
1244	}	1527	}
1245		1528
1246	void	1529	void
		1530	ev_periodic_again (EV_P_ 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
1247	ev_idle_start (EV_P_ struct ev_idle *w)	1539	ev_idle_start (EV_P_ ev_idle *w)
1248	{	1540	{
1249	if (ev_is_active (w))	1541	if (expect_false (ev_is_active (w)))
1250	return;	1542	return;
1251		1543
1252	ev_start (EV_A_ (W)w, ++idlecnt);	1544	ev_start (EV_A_ (W)w, ++idlecnt);
1253	array_needsize (idles, idlemax, idlecnt, );	1545	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1254	idles [idlecnt - 1] = w;	1546	idles [idlecnt - 1] = w;
1255	}	1547	}
1256		1548
1257	void	1549	void
1258	ev_idle_stop (EV_P_ struct ev_idle *w)	1550	ev_idle_stop (EV_P_ ev_idle *w)
1259	{	1551	{
1260	ev_clear_pending (EV_A_ (W)w);	1552	ev_clear_pending (EV_A_ (W)w);
1261	if (ev_is_active (w))	1553	if (expect_false (!ev_is_active (w)))
1262	return;	1554	return;
1263		1555
1264	idles [((W)w)->active - 1] = idles [--idlecnt];	1556	idles [((W)w)->active - 1] = idles [--idlecnt];
1265	ev_stop (EV_A_ (W)w);	1557	ev_stop (EV_A_ (W)w);
1266	}	1558	}
1267		1559
1268	void	1560	void
1269	ev_prepare_start (EV_P_ struct ev_prepare *w)	1561	ev_prepare_start (EV_P_ ev_prepare *w)
1270	{	1562	{
1271	if (ev_is_active (w))	1563	if (expect_false (ev_is_active (w)))
1272	return;	1564	return;
1273		1565
1274	ev_start (EV_A_ (W)w, ++preparecnt);	1566	ev_start (EV_A_ (W)w, ++preparecnt);
1275	array_needsize (prepares, preparemax, preparecnt, );	1567	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1276	prepares [preparecnt - 1] = w;	1568	prepares [preparecnt - 1] = w;
1277	}	1569	}
1278		1570
1279	void	1571	void
1280	ev_prepare_stop (EV_P_ struct ev_prepare *w)	1572	ev_prepare_stop (EV_P_ ev_prepare *w)
1281	{	1573	{
1282	ev_clear_pending (EV_A_ (W)w);	1574	ev_clear_pending (EV_A_ (W)w);
1283	if (ev_is_active (w))	1575	if (expect_false (!ev_is_active (w)))
1284	return;	1576	return;
1285		1577
1286	prepares [((W)w)->active - 1] = prepares [--preparecnt];	1578	prepares [((W)w)->active - 1] = prepares [--preparecnt];
1287	ev_stop (EV_A_ (W)w);	1579	ev_stop (EV_A_ (W)w);
1288	}	1580	}
1289		1581
1290	void	1582	void
1291	ev_check_start (EV_P_ struct ev_check *w)	1583	ev_check_start (EV_P_ ev_check *w)
1292	{	1584	{
1293	if (ev_is_active (w))	1585	if (expect_false (ev_is_active (w)))
1294	return;	1586	return;
1295		1587
1296	ev_start (EV_A_ (W)w, ++checkcnt);	1588	ev_start (EV_A_ (W)w, ++checkcnt);
1297	array_needsize (checks, checkmax, checkcnt, );	1589	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1298	checks [checkcnt - 1] = w;	1590	checks [checkcnt - 1] = w;
1299	}	1591	}
1300		1592
1301	void	1593	void
1302	ev_check_stop (EV_P_ struct ev_check *w)	1594	ev_check_stop (EV_P_ ev_check *w)
1303	{	1595	{
1304	ev_clear_pending (EV_A_ (W)w);	1596	ev_clear_pending (EV_A_ (W)w);
1305	if (ev_is_active (w))	1597	if (expect_false (!ev_is_active (w)))
1306	return;	1598	return;
1307		1599
1308	checks [((W)w)->active - 1] = checks [--checkcnt];	1600	checks [((W)w)->active - 1] = checks [--checkcnt];
1309	ev_stop (EV_A_ (W)w);	1601	ev_stop (EV_A_ (W)w);
1310	}	1602	}
…		…
1312	#ifndef SA_RESTART	1604	#ifndef SA_RESTART
1313	# define SA_RESTART 0	1605	# define SA_RESTART 0
1314	#endif	1606	#endif
1315		1607
1316	void	1608	void
1317	ev_signal_start (EV_P_ struct ev_signal *w)	1609	ev_signal_start (EV_P_ ev_signal *w)
1318	{	1610	{
1319	#if EV_MULTIPLICITY	1611	#if EV_MULTIPLICITY
1320	assert (("signal watchers are only supported in the default loop", loop == default_loop));	1612	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1321	#endif	1613	#endif
1322	if (ev_is_active (w))	1614	if (expect_false (ev_is_active (w)))
1323	return;	1615	return;
1324		1616
1325	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));
1326		1618
1327	ev_start (EV_A_ (W)w, 1);	1619	ev_start (EV_A_ (W)w, 1);
1328	array_needsize (signals, signalmax, w->signum, signals_init);	1620	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1329	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1621	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1330		1622
1331	if (!((WL)w)->next)	1623	if (!((WL)w)->next)
1332	{	1624	{
1333	#if WIN32	1625	#if _WIN32
1334	signal (w->signum, sighandler);	1626	signal (w->signum, sighandler);
1335	#else	1627	#else
1336	struct sigaction sa;	1628	struct sigaction sa;
1337	sa.sa_handler = sighandler;	1629	sa.sa_handler = sighandler;
1338	sigfillset (&sa.sa_mask);	1630	sigfillset (&sa.sa_mask);
…		…
1341	#endif	1633	#endif
1342	}	1634	}
1343	}	1635	}
1344		1636
1345	void	1637	void
1346	ev_signal_stop (EV_P_ struct ev_signal *w)	1638	ev_signal_stop (EV_P_ ev_signal *w)
1347	{	1639	{
1348	ev_clear_pending (EV_A_ (W)w);	1640	ev_clear_pending (EV_A_ (W)w);
1349	if (!ev_is_active (w))	1641	if (expect_false (!ev_is_active (w)))
1350	return;	1642	return;
1351		1643
1352	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1644	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1353	ev_stop (EV_A_ (W)w);	1645	ev_stop (EV_A_ (W)w);
1354		1646
1355	if (!signals [w->signum - 1].head)	1647	if (!signals [w->signum - 1].head)
1356	signal (w->signum, SIG_DFL);	1648	signal (w->signum, SIG_DFL);
1357	}	1649	}
1358		1650
1359	void	1651	void
1360	ev_child_start (EV_P_ struct ev_child *w)	1652	ev_child_start (EV_P_ ev_child *w)
1361	{	1653	{
1362	#if EV_MULTIPLICITY	1654	#if EV_MULTIPLICITY
1363	assert (("child watchers are only supported in the default loop", loop == default_loop));	1655	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1364	#endif	1656	#endif
1365	if (ev_is_active (w))	1657	if (expect_false (ev_is_active (w)))
1366	return;	1658	return;
1367		1659
1368	ev_start (EV_A_ (W)w, 1);	1660	ev_start (EV_A_ (W)w, 1);
1369	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1661	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1370	}	1662	}
1371		1663
1372	void	1664	void
1373	ev_child_stop (EV_P_ struct ev_child *w)	1665	ev_child_stop (EV_P_ ev_child *w)
1374	{	1666	{
1375	ev_clear_pending (EV_A_ (W)w);	1667	ev_clear_pending (EV_A_ (W)w);
1376	if (ev_is_active (w))	1668	if (expect_false (!ev_is_active (w)))
1377	return;	1669	return;
1378		1670
1379	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1671	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1380	ev_stop (EV_A_ (W)w);	1672	ev_stop (EV_A_ (W)w);
1381	}	1673	}
1382		1674
		1675	#if EV_MULTIPLICITY
		1676	void
		1677	ev_embed_loop (EV_P_ ev_embed *w)
		1678	{
		1679	ev_loop (w->loop, EVLOOP_NONBLOCK);
		1680	}
		1681
		1682	static void
		1683	embed_cb (EV_P_ ev_io *io, int revents)
		1684	{
		1685	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		1686
		1687	if (ev_cb (w))
		1688	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		1689	else
		1690	ev_embed_loop (loop, w);
		1691	}
		1692
		1693	void
		1694	ev_embed_start (EV_P_ ev_embed *w)
		1695	{
		1696	if (expect_false (ev_is_active (w)))
		1697	return;
		1698
		1699	{
		1700	struct ev_loop *loop = w->loop;
		1701	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		1702	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		1703	}
		1704
		1705	ev_set_priority (&w->io, ev_priority (w));
		1706	ev_io_start (EV_A_ &w->io);
		1707	ev_start (EV_A_ (W)w, 1);
		1708	}
		1709
		1710	void
		1711	ev_embed_stop (EV_P_ ev_embed *w)
		1712	{
		1713	ev_clear_pending (EV_A_ (W)w);
		1714	if (expect_false (!ev_is_active (w)))
		1715	return;
		1716
		1717	ev_io_stop (EV_A_ &w->io);
		1718	ev_stop (EV_A_ (W)w);
		1719	}
		1720	#endif
		1721
1383	/*****************************************************************************/	1722	/*****************************************************************************/
1384		1723
1385	struct ev_once	1724	struct ev_once
1386	{	1725	{
1387	struct ev_io io;	1726	ev_io io;
1388	struct ev_timer to;	1727	ev_timer to;
1389	void (*cb)(int revents, void *arg);	1728	void (*cb)(int revents, void *arg);
1390	void *arg;	1729	void *arg;
1391	};	1730	};
1392		1731
1393	static void	1732	static void
…		…
1396	void (*cb)(int revents, void *arg) = once->cb;	1735	void (*cb)(int revents, void *arg) = once->cb;
1397	void *arg = once->arg;	1736	void *arg = once->arg;
1398		1737
1399	ev_io_stop (EV_A_ &once->io);	1738	ev_io_stop (EV_A_ &once->io);
1400	ev_timer_stop (EV_A_ &once->to);	1739	ev_timer_stop (EV_A_ &once->to);
1401	free (once);	1740	ev_free (once);
1402		1741
1403	cb (revents, arg);	1742	cb (revents, arg);
1404	}	1743	}
1405		1744
1406	static void	1745	static void
1407	once_cb_io (EV_P_ struct ev_io *w, int revents)	1746	once_cb_io (EV_P_ ev_io *w, int revents)
1408	{	1747	{
1409	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1748	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1410	}	1749	}
1411		1750
1412	static void	1751	static void
1413	once_cb_to (EV_P_ struct ev_timer *w, int revents)	1752	once_cb_to (EV_P_ ev_timer *w, int revents)
1414	{	1753	{
1415	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1754	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1416	}	1755	}
1417		1756
1418	void	1757	void
1419	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1758	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1420	{	1759	{
1421	struct ev_once *once = malloc (sizeof (struct ev_once));	1760	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1422		1761
1423	if (!once)	1762	if (expect_false (!once))
		1763	{
1424	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1764	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1425	else	1765	return;
1426	{	1766	}
		1767
1427	once->cb = cb;	1768	once->cb = cb;
1428	once->arg = arg;	1769	once->arg = arg;
1429		1770
1430	ev_watcher_init (&once->io, once_cb_io);	1771	ev_init (&once->io, once_cb_io);
1431	if (fd >= 0)	1772	if (fd >= 0)
1432	{	1773	{
1433	ev_io_set (&once->io, fd, events);	1774	ev_io_set (&once->io, fd, events);
1434	ev_io_start (EV_A_ &once->io);	1775	ev_io_start (EV_A_ &once->io);
1435	}	1776	}
1436		1777
1437	ev_watcher_init (&once->to, once_cb_to);	1778	ev_init (&once->to, once_cb_to);
1438	if (timeout >= 0.)	1779	if (timeout >= 0.)
1439	{	1780	{
1440	ev_timer_set (&once->to, timeout, 0.);	1781	ev_timer_set (&once->to, timeout, 0.);
1441	ev_timer_start (EV_A_ &once->to);	1782	ev_timer_start (EV_A_ &once->to);
1442	}
1443	}	1783	}
1444	}	1784	}
1445		1785
		1786	#ifdef __cplusplus
		1787	}
		1788	#endif
		1789

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