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Comparing libev/ev.c (file contents):
Revision 1.65 by root, Sun Nov 4 23:29:48 2007 UTC vs.
Revision 1.139 by root, Sun Nov 25 09:24:37 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
		213	#ifdef _WIN32
		214	# include "ev_win32.c"
		215	#endif
		216
150	/*****************************************************************************/	217	/*****************************************************************************/
151		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
152	typedef struct	267	typedef struct
153	{	268	{
154	struct ev_watcher_list *head;	269	WL head;
155	unsigned char events;	270	unsigned char events;
156	unsigned char reify;	271	unsigned char reify;
		272	#if EV_SELECT_IS_WINSOCKET
		273	SOCKET handle;
		274	#endif
157	} ANFD;	275	} ANFD;
158		276
159	typedef struct	277	typedef struct
160	{	278	{
161	W w;	279	W w;
162	int events;	280	int events;
163	} ANPENDING;	281	} ANPENDING;
164		282
165	#if EV_MULTIPLICITY	283	#if EV_MULTIPLICITY
166		284
167	struct ev_loop	285	struct ev_loop
168	{	286	{
		287	ev_tstamp ev_rt_now;
		288	#define ev_rt_now ((loop)->ev_rt_now)
169	# define VAR(name,decl) decl;	289	#define VAR(name,decl) decl;
170	# include "ev_vars.h"	290	#include "ev_vars.h"
171	};
172	# undef VAR	291	#undef VAR
		292	};
173	# 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;
174		297
175	#else	298	#else
176		299
		300	ev_tstamp ev_rt_now;
177	# define VAR(name,decl) static decl;	301	#define VAR(name,decl) static decl;
178	# include "ev_vars.h"	302	#include "ev_vars.h"
179	# undef VAR	303	#undef VAR
		304
		305	static int ev_default_loop_ptr;
180		306
181	#endif	307	#endif
182		308
183	/*****************************************************************************/	309	/*****************************************************************************/
184		310
185	inline ev_tstamp	311	ev_tstamp
186	ev_time (void)	312	ev_time (void)
187	{	313	{
188	#if EV_USE_REALTIME	314	#if EV_USE_REALTIME
189	struct timespec ts;	315	struct timespec ts;
190	clock_gettime (CLOCK_REALTIME, &ts);	316	clock_gettime (CLOCK_REALTIME, &ts);
…		…
209	#endif	335	#endif
210		336
211	return ev_time ();	337	return ev_time ();
212	}	338	}
213		339
		340	#if EV_MULTIPLICITY
214	ev_tstamp	341	ev_tstamp
215	ev_now (EV_P)	342	ev_now (EV_P)
216	{	343	{
217	return rt_now;	344	return ev_rt_now;
218	}	345	}
		346	#endif
219		347
220	#define array_roundsize(base,n) ((n) | 4 & ~3)	348	#define array_roundsize(type,n) (((n) | 4) & ~3)
221		349
222	#define array_needsize(base,cur,cnt,init) \	350	#define array_needsize(type,base,cur,cnt,init) \
223	if (expect_false ((cnt) > cur)) \	351	if (expect_false ((cnt) > cur)) \
224	{ \	352	{ \
225	int newcnt = cur; \	353	int newcnt = cur; \
226	do \	354	do \
227	{ \	355	{ \
228	newcnt = array_roundsize (base, newcnt << 1); \	356	newcnt = array_roundsize (type, newcnt << 1); \
229	} \	357	} \
230	while ((cnt) > newcnt); \	358	while ((cnt) > newcnt); \
231	\	359	\
232	base = realloc (base, sizeof (*base) * (newcnt)); \	360	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
233	init (base + cur, newcnt - cur); \	361	init (base + cur, newcnt - cur); \
234	cur = newcnt; \	362	cur = newcnt; \
		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*/\
235	}	371	}
236		372
237	#define array_free(stem, idx) \	373	#define array_free(stem, idx) \
238	free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	374	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
239		375
240	/*****************************************************************************/	376	/*****************************************************************************/
241		377
242	static void	378	static void
243	anfds_init (ANFD *base, int count)	379	anfds_init (ANFD *base, int count)
…		…
250		386
251	++base;	387	++base;
252	}	388	}
253	}	389	}
254		390
255	static void	391	void
256	event (EV_P_ W w, int events)	392	ev_feed_event (EV_P_ void *w, int revents)
257	{	393	{
258	if (w->pending)	394	W w_ = (W)w;
		395
		396	if (expect_false (w_->pending))
259	{	397	{
260	pendings [ABSPRI (w)][w->pending - 1].events |= events;	398	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
261	return;	399	return;
262	}	400	}
263		401
264	w->pending = ++pendingcnt [ABSPRI (w)];	402	w_->pending = ++pendingcnt [ABSPRI (w_)];
265	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);
266	pendings [ABSPRI (w)][w->pending - 1].w = w;	404	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
267	pendings [ABSPRI (w)][w->pending - 1].events = events;	405	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
268	}	406	}
269		407
270	static void	408	static void
271	queue_events (EV_P_ W *events, int eventcnt, int type)	409	queue_events (EV_P_ W *events, int eventcnt, int type)
272	{	410	{
273	int i;	411	int i;
274		412
275	for (i = 0; i < eventcnt; ++i)	413	for (i = 0; i < eventcnt; ++i)
276	event (EV_A_ events [i], type);	414	ev_feed_event (EV_A_ events [i], type);
277	}	415	}
278		416
279	static void	417	inline void
280	fd_event (EV_P_ int fd, int events)	418	fd_event (EV_P_ int fd, int revents)
281	{	419	{
282	ANFD *anfd = anfds + fd;	420	ANFD *anfd = anfds + fd;
283	struct ev_io *w;	421	ev_io *w;
284		422
285	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)
286	{	424	{
287	int ev = w->events & events;	425	int ev = w->events & revents;
288		426
289	if (ev)	427	if (ev)
290	event (EV_A_ (W)w, ev);	428	ev_feed_event (EV_A_ (W)w, ev);
291	}	429	}
		430	}
		431
		432	void
		433	ev_feed_fd_event (EV_P_ int fd, int revents)
		434	{
		435	fd_event (EV_A_ fd, revents);
292	}	436	}
293		437
294	/*****************************************************************************/	438	/*****************************************************************************/
295		439
296	static void	440	inline void
297	fd_reify (EV_P)	441	fd_reify (EV_P)
298	{	442	{
299	int i;	443	int i;
300		444
301	for (i = 0; i < fdchangecnt; ++i)	445	for (i = 0; i < fdchangecnt; ++i)
302	{	446	{
303	int fd = fdchanges [i];	447	int fd = fdchanges [i];
304	ANFD *anfd = anfds + fd;	448	ANFD *anfd = anfds + fd;
305	struct ev_io *w;	449	ev_io *w;
306		450
307	int events = 0;	451	int events = 0;
308		452
309	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)
310	events |= w->events;	454	events |= w->events;
311		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
312	anfd->reify = 0;	465	anfd->reify = 0;
313		466
314	method_modify (EV_A_ fd, anfd->events, events);	467	backend_modify (EV_A_ fd, anfd->events, events);
315	anfd->events = events;	468	anfd->events = events;
316	}	469	}
317		470
318	fdchangecnt = 0;	471	fdchangecnt = 0;
319	}	472	}
320		473
321	static void	474	static void
322	fd_change (EV_P_ int fd)	475	fd_change (EV_P_ int fd)
323	{	476	{
324	if (anfds [fd].reify || fdchangecnt < 0)	477	if (expect_false (anfds [fd].reify))
325	return;	478	return;
326		479
327	anfds [fd].reify = 1;	480	anfds [fd].reify = 1;
328		481
329	++fdchangecnt;	482	++fdchangecnt;
330	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	483	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
331	fdchanges [fdchangecnt - 1] = fd;	484	fdchanges [fdchangecnt - 1] = fd;
332	}	485	}
333		486
334	static void	487	static void
335	fd_kill (EV_P_ int fd)	488	fd_kill (EV_P_ int fd)
336	{	489	{
337	struct ev_io *w;	490	ev_io *w;
338		491
339	while ((w = (struct ev_io *)anfds [fd].head))	492	while ((w = (ev_io *)anfds [fd].head))
340	{	493	{
341	ev_io_stop (EV_A_ w);	494	ev_io_stop (EV_A_ w);
342	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);
343	}	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
344	}	507	}
345		508
346	/* called on EBADF to verify fds */	509	/* called on EBADF to verify fds */
347	static void	510	static void
348	fd_ebadf (EV_P)	511	fd_ebadf (EV_P)
349	{	512	{
350	int fd;	513	int fd;
351		514
352	for (fd = 0; fd < anfdmax; ++fd)	515	for (fd = 0; fd < anfdmax; ++fd)
353	if (anfds [fd].events)	516	if (anfds [fd].events)
354	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	517	if (!fd_valid (fd) == -1 && errno == EBADF)
355	fd_kill (EV_A_ fd);	518	fd_kill (EV_A_ fd);
356	}	519	}
357		520
358	/* 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 */
359	static void	522	static void
…		…
362	int fd;	525	int fd;
363		526
364	for (fd = anfdmax; fd--; )	527	for (fd = anfdmax; fd--; )
365	if (anfds [fd].events)	528	if (anfds [fd].events)
366	{	529	{
367	close (fd);
368	fd_kill (EV_A_ fd);	530	fd_kill (EV_A_ fd);
369	return;	531	return;
370	}	532	}
371	}	533	}
372		534
373	/* 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 */
374	static void	536	static void
375	fd_rearm_all (EV_P)	537	fd_rearm_all (EV_P)
376	{	538	{
377	int fd;	539	int fd;
378		540
…		…
426		588
427	heap [k] = w;	589	heap [k] = w;
428	((W)heap [k])->active = k + 1;	590	((W)heap [k])->active = k + 1;
429	}	591	}
430		592
		593	inline void
		594	adjustheap (WT *heap, int N, int k)
		595	{
		596	upheap (heap, k);
		597	downheap (heap, N, k);
		598	}
		599
431	/*****************************************************************************/	600	/*****************************************************************************/
432		601
433	typedef struct	602	typedef struct
434	{	603	{
435	struct ev_watcher_list *head;	604	WL head;
436	sig_atomic_t volatile gotsig;	605	sig_atomic_t volatile gotsig;
437	} ANSIG;	606	} ANSIG;
438		607
439	static ANSIG *signals;	608	static ANSIG *signals;
440	static int signalmax;	609	static int signalmax;
441		610
442	static int sigpipe [2];	611	static int sigpipe [2];
443	static sig_atomic_t volatile gotsig;	612	static sig_atomic_t volatile gotsig;
444	static struct ev_io sigev;	613	static ev_io sigev;
445		614
446	static void	615	static void
447	signals_init (ANSIG *base, int count)	616	signals_init (ANSIG *base, int count)
448	{	617	{
449	while (count--)	618	while (count--)
…		…
456	}	625	}
457		626
458	static void	627	static void
459	sighandler (int signum)	628	sighandler (int signum)
460	{	629	{
		630	#if _WIN32
		631	signal (signum, sighandler);
		632	#endif
		633
461	signals [signum - 1].gotsig = 1;	634	signals [signum - 1].gotsig = 1;
462		635
463	if (!gotsig)	636	if (!gotsig)
464	{	637	{
465	int old_errno = errno;	638	int old_errno = errno;
…		…
467	write (sigpipe [1], &signum, 1);	640	write (sigpipe [1], &signum, 1);
468	errno = old_errno;	641	errno = old_errno;
469	}	642	}
470	}	643	}
471		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
472	static void	665	static void
473	sigcb (EV_P_ struct ev_io *iow, int revents)	666	sigcb (EV_P_ ev_io *iow, int revents)
474	{	667	{
475	struct ev_watcher_list *w;
476	int signum;	668	int signum;
477		669
478	read (sigpipe [0], &revents, 1);	670	read (sigpipe [0], &revents, 1);
479	gotsig = 0;	671	gotsig = 0;
480		672
481	for (signum = signalmax; signum--; )	673	for (signum = signalmax; signum--; )
482	if (signals [signum].gotsig)	674	if (signals [signum].gotsig)
483	{	675	ev_feed_signal_event (EV_A_ signum + 1);
484	signals [signum].gotsig = 0;	676	}
485		677
486	for (w = signals [signum].head; w; w = w->next)	678	static void
487	event (EV_A_ (W)w, EV_SIGNAL);	679	fd_intern (int fd)
488	}	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
489	}	688	}
490		689
491	static void	690	static void
492	siginit (EV_P)	691	siginit (EV_P)
493	{	692	{
494	#ifndef WIN32	693	fd_intern (sigpipe [0]);
495	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	694	fd_intern (sigpipe [1]);
496	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
497
498	/* rather than sort out wether we really need nb, set it */
499	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
500	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
501	#endif
502		695
503	ev_io_set (&sigev, sigpipe [0], EV_READ);	696	ev_io_set (&sigev, sigpipe [0], EV_READ);
504	ev_io_start (EV_A_ &sigev);	697	ev_io_start (EV_A_ &sigev);
505	ev_unref (EV_A); /* child watcher should not keep loop alive */	698	ev_unref (EV_A); /* child watcher should not keep loop alive */
506	}	699	}
507		700
508	/*****************************************************************************/	701	/*****************************************************************************/
509		702
		703	static ev_child *childs [PID_HASHSIZE];
		704
510	#ifndef WIN32	705	#ifndef _WIN32
511		706
512	static struct ev_child *childs [PID_HASHSIZE];
513	static struct ev_signal childev;	707	static ev_signal childev;
514		708
515	#ifndef WCONTINUED	709	#ifndef WCONTINUED
516	# define WCONTINUED 0	710	# define WCONTINUED 0
517	#endif	711	#endif
518		712
519	static void	713	static void
520	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)
521	{	715	{
522	struct ev_child *w;	716	ev_child *w;
523		717
524	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)
525	if (w->pid == pid || !w->pid)	719	if (w->pid == pid || !w->pid)
526	{	720	{
527	ev_priority (w) = ev_priority (sw); /* need to do it *now* */	721	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
528	w->rpid = pid;	722	w->rpid = pid;
529	w->rstatus = status;	723	w->rstatus = status;
530	event (EV_A_ (W)w, EV_CHILD);	724	ev_feed_event (EV_A_ (W)w, EV_CHILD);
531	}	725	}
532	}	726	}
533		727
534	static void	728	static void
535	childcb (EV_P_ struct ev_signal *sw, int revents)	729	childcb (EV_P_ ev_signal *sw, int revents)
536	{	730	{
537	int pid, status;	731	int pid, status;
538		732
539	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	733	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
540	{	734	{
541	/* 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 */
542	event (EV_A_ (W)sw, EV_SIGNAL);	737	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
543		738
544	child_reap (EV_A_ sw, pid, pid, status);	739	child_reap (EV_A_ sw, pid, pid, status);
545	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 */
546	}	741	}
547	}	742	}
548		743
549	#endif	744	#endif
550		745
551	/*****************************************************************************/	746	/*****************************************************************************/
552		747
		748	#if EV_USE_PORT
		749	# include "ev_port.c"
		750	#endif
553	#if EV_USE_KQUEUE	751	#if EV_USE_KQUEUE
554	# include "ev_kqueue.c"	752	# include "ev_kqueue.c"
555	#endif	753	#endif
556	#if EV_USE_EPOLL	754	#if EV_USE_EPOLL
557	# include "ev_epoll.c"	755	# include "ev_epoll.c"
…		…
577		775
578	/* 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 */
579	static int	777	static int
580	enable_secure (void)	778	enable_secure (void)
581	{	779	{
582	#ifdef WIN32	780	#ifdef _WIN32
583	return 0;	781	return 0;
584	#else	782	#else
585	return getuid () != geteuid ()	783	return getuid () != geteuid ()
586	|| getgid () != getegid ();	784	|| getgid () != getegid ();
587	#endif	785	#endif
588	}	786	}
589		787
590	int	788	unsigned int
591	ev_method (EV_P)	789	ev_supported_backends (void)
592	{	790	{
593	return method;	791	unsigned int flags = 0;
594	}
595		792
596	static void	793	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
597	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)
598	{	804	{
599	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)
600	{	838	{
601	#if EV_USE_MONOTONIC	839	#if EV_USE_MONOTONIC
602	{	840	{
603	struct timespec ts;	841	struct timespec ts;
604	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	842	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
605	have_monotonic = 1;	843	have_monotonic = 1;
606	}	844	}
607	#endif	845	#endif
608		846
609	rt_now = ev_time ();	847	ev_rt_now = ev_time ();
610	mn_now = get_clock ();	848	mn_now = get_clock ();
611	now_floor = mn_now;	849	now_floor = mn_now;
612	rtmn_diff = rt_now - mn_now;	850	rtmn_diff = ev_rt_now - mn_now;
613		851
614	if (methods == EVMETHOD_AUTO)	852	if (!(flags & EVFLAG_NOENV)
615	if (!enable_secure () && getenv ("LIBEV_METHODS"))	853	&& !enable_secure ()
		854	&& getenv ("LIBEV_FLAGS"))
616	methods = atoi (getenv ("LIBEV_METHODS"));	855	flags = atoi (getenv ("LIBEV_FLAGS"));
617	else
618	methods = EVMETHOD_ANY;
619		856
620	method = 0;	857	if (!(flags & 0x0000ffffUL))
621	#if EV_USE_WIN32	858	flags |= ev_recommended_backends ();
622	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);
623	#endif	863	#endif
624	#if EV_USE_KQUEUE	864	#if EV_USE_KQUEUE
625	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);	865	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
626	#endif	866	#endif
627	#if EV_USE_EPOLL	867	#if EV_USE_EPOLL
628	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);	868	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
629	#endif	869	#endif
630	#if EV_USE_POLL	870	#if EV_USE_POLL
631	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);	871	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
632	#endif	872	#endif
633	#if EV_USE_SELECT	873	#if EV_USE_SELECT
634	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);	874	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
635	#endif	875	#endif
636	}
637	}
638		876
639	void	877	ev_init (&sigev, sigcb);
		878	ev_set_priority (&sigev, EV_MAXPRI);
		879	}
		880	}
		881
		882	static void
640	loop_destroy (EV_P)	883	loop_destroy (EV_P)
641	{	884	{
642	int i;	885	int i;
643		886
644	#if EV_USE_WIN32	887	#if EV_USE_PORT
645	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);	888	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
646	#endif	889	#endif
647	#if EV_USE_KQUEUE	890	#if EV_USE_KQUEUE
648	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);	891	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
649	#endif	892	#endif
650	#if EV_USE_EPOLL	893	#if EV_USE_EPOLL
651	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);	894	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
652	#endif	895	#endif
653	#if EV_USE_POLL	896	#if EV_USE_POLL
654	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);	897	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
655	#endif	898	#endif
656	#if EV_USE_SELECT	899	#if EV_USE_SELECT
657	if (method == EVMETHOD_SELECT) select_destroy (EV_A);	900	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
658	#endif	901	#endif
659		902
660	for (i = NUMPRI; i--; )	903	for (i = NUMPRI; i--; )
661	array_free (pending, [i]);	904	array_free (pending, [i]);
662		905
		906	/* have to use the microsoft-never-gets-it-right macro */
663	array_free (fdchange, );	907	array_free (fdchange, EMPTY0);
664	array_free (timer, );	908	array_free (timer, EMPTY0);
		909	#if EV_PERIODICS
665	array_free (periodic, );	910	array_free (periodic, EMPTY0);
		911	#endif
666	array_free (idle, );	912	array_free (idle, EMPTY0);
667	array_free (prepare, );	913	array_free (prepare, EMPTY0);
668	array_free (check, );	914	array_free (check, EMPTY0);
669		915
670	method = 0;	916	backend = 0;
671	/*TODO*/
672	}	917	}
673		918
674	void	919	static void
675	loop_fork (EV_P)	920	loop_fork (EV_P)
676	{	921	{
677	/*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
678	#if EV_USE_EPOLL	928	#if EV_USE_EPOLL
679	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);	929	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
680	#endif	930	#endif
681	#if EV_USE_KQUEUE	931
682	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);	932	if (ev_is_active (&sigev))
683	#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;
684	}	948	}
685		949
686	#if EV_MULTIPLICITY	950	#if EV_MULTIPLICITY
687	struct ev_loop *	951	struct ev_loop *
688	ev_loop_new (int methods)	952	ev_loop_new (unsigned int flags)
689	{	953	{
690	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));
691		955
		956	memset (loop, 0, sizeof (struct ev_loop));
		957
692	loop_init (EV_A_ methods);	958	loop_init (EV_A_ flags);
693		959
694	if (ev_method (EV_A))	960	if (ev_backend (EV_A))
695	return loop;	961	return loop;
696		962
697	return 0;	963	return 0;
698	}	964	}
699		965
700	void	966	void
701	ev_loop_destroy (EV_P)	967	ev_loop_destroy (EV_P)
702	{	968	{
703	loop_destroy (EV_A);	969	loop_destroy (EV_A);
704	free (loop);	970	ev_free (loop);
705	}	971	}
706		972
707	void	973	void
708	ev_loop_fork (EV_P)	974	ev_loop_fork (EV_P)
709	{	975	{
710	loop_fork (EV_A);	976	postfork = 1;
711	}	977	}
712		978
713	#endif	979	#endif
714		980
715	#if EV_MULTIPLICITY	981	#if EV_MULTIPLICITY
716	struct ev_loop default_loop_struct;
717	static struct ev_loop *default_loop;
718
719	struct ev_loop *	982	struct ev_loop *
		983	ev_default_loop_init (unsigned int flags)
720	#else	984	#else
721	static int default_loop;
722
723	int	985	int
		986	ev_default_loop (unsigned int flags)
724	#endif	987	#endif
725	ev_default_loop (int methods)
726	{	988	{
727	if (sigpipe [0] == sigpipe [1])	989	if (sigpipe [0] == sigpipe [1])
728	if (pipe (sigpipe))	990	if (pipe (sigpipe))
729	return 0;	991	return 0;
730		992
731	if (!default_loop)	993	if (!ev_default_loop_ptr)
732	{	994	{
733	#if EV_MULTIPLICITY	995	#if EV_MULTIPLICITY
734	struct ev_loop *loop = default_loop = &default_loop_struct;	996	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
735	#else	997	#else
736	default_loop = 1;	998	ev_default_loop_ptr = 1;
737	#endif	999	#endif
738		1000
739	loop_init (EV_A_ methods);	1001	loop_init (EV_A_ flags);
740		1002
741	if (ev_method (EV_A))	1003	if (ev_backend (EV_A))
742	{	1004	{
743	ev_watcher_init (&sigev, sigcb);
744	ev_set_priority (&sigev, EV_MAXPRI);
745	siginit (EV_A);	1005	siginit (EV_A);
746		1006
747	#ifndef WIN32	1007	#ifndef _WIN32
748	ev_signal_init (&childev, childcb, SIGCHLD);	1008	ev_signal_init (&childev, childcb, SIGCHLD);
749	ev_set_priority (&childev, EV_MAXPRI);	1009	ev_set_priority (&childev, EV_MAXPRI);
750	ev_signal_start (EV_A_ &childev);	1010	ev_signal_start (EV_A_ &childev);
751	ev_unref (EV_A); /* child watcher should not keep loop alive */	1011	ev_unref (EV_A); /* child watcher should not keep loop alive */
752	#endif	1012	#endif
753	}	1013	}
754	else	1014	else
755	default_loop = 0;	1015	ev_default_loop_ptr = 0;
756	}	1016	}
757		1017
758	return default_loop;	1018	return ev_default_loop_ptr;
759	}	1019	}
760		1020
761	void	1021	void
762	ev_default_destroy (void)	1022	ev_default_destroy (void)
763	{	1023	{
764	#if EV_MULTIPLICITY	1024	#if EV_MULTIPLICITY
765	struct ev_loop *loop = default_loop;	1025	struct ev_loop *loop = ev_default_loop_ptr;
766	#endif	1026	#endif
767		1027
		1028	#ifndef _WIN32
768	ev_ref (EV_A); /* child watcher */	1029	ev_ref (EV_A); /* child watcher */
769	ev_signal_stop (EV_A_ &childev);	1030	ev_signal_stop (EV_A_ &childev);
		1031	#endif
770		1032
771	ev_ref (EV_A); /* signal watcher */	1033	ev_ref (EV_A); /* signal watcher */
772	ev_io_stop (EV_A_ &sigev);	1034	ev_io_stop (EV_A_ &sigev);
773		1035
774	close (sigpipe [0]); sigpipe [0] = 0;	1036	close (sigpipe [0]); sigpipe [0] = 0;
…		…
779		1041
780	void	1042	void
781	ev_default_fork (void)	1043	ev_default_fork (void)
782	{	1044	{
783	#if EV_MULTIPLICITY	1045	#if EV_MULTIPLICITY
784	struct ev_loop *loop = default_loop;	1046	struct ev_loop *loop = ev_default_loop_ptr;
785	#endif	1047	#endif
786		1048
787	loop_fork (EV_A);	1049	if (backend)
788		1050	postfork = 1;
789	ev_io_stop (EV_A_ &sigev);
790	close (sigpipe [0]);
791	close (sigpipe [1]);
792	pipe (sigpipe);
793
794	ev_ref (EV_A); /* signal watcher */
795	siginit (EV_A);
796	}	1051	}
797		1052
798	/*****************************************************************************/	1053	/*****************************************************************************/
799		1054
800	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
801	call_pending (EV_P)	1068	call_pending (EV_P)
802	{	1069	{
803	int pri;	1070	int pri;
804		1071
805	for (pri = NUMPRI; pri--; )	1072	for (pri = NUMPRI; pri--; )
806	while (pendingcnt [pri])	1073	while (pendingcnt [pri])
807	{	1074	{
808	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1075	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
809		1076
810	if (p->w)	1077	if (expect_true (p->w))
811	{	1078	{
		1079	assert (("non-pending watcher on pending list", p->w->pending));
		1080
812	p->w->pending = 0;	1081	p->w->pending = 0;
813		1082	EV_CB_INVOKE (p->w, p->events);
814	((void (*)(EV_P_ W, int))p->w->cb) (EV_A_ p->w, p->events);
815	}	1083	}
816	}	1084	}
817	}	1085	}
818		1086
819	static void	1087	inline void
820	timers_reify (EV_P)	1088	timers_reify (EV_P)
821	{	1089	{
822	while (timercnt && ((WT)timers [0])->at <= mn_now)	1090	while (timercnt && ((WT)timers [0])->at <= mn_now)
823	{	1091	{
824	struct ev_timer *w = timers [0];	1092	ev_timer *w = timers [0];
825		1093
826	assert (("inactive timer on timer heap detected", ev_is_active (w)));	1094	assert (("inactive timer on timer heap detected", ev_is_active (w)));
827		1095
828	/* first reschedule or stop timer */	1096	/* first reschedule or stop timer */
829	if (w->repeat)	1097	if (w->repeat)
830	{	1098	{
831	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1099	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1100
832	((WT)w)->at = mn_now + w->repeat;	1101	((WT)w)->at += w->repeat;
		1102	if (((WT)w)->at < mn_now)
		1103	((WT)w)->at = mn_now;
		1104
833	downheap ((WT *)timers, timercnt, 0);	1105	downheap ((WT *)timers, timercnt, 0);
834	}	1106	}
835	else	1107	else
836	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1108	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
837		1109
838	event (EV_A_ (W)w, EV_TIMEOUT);	1110	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
839	}	1111	}
840	}	1112	}
841		1113
842	static void	1114	#if EV_PERIODICS
		1115	inline void
843	periodics_reify (EV_P)	1116	periodics_reify (EV_P)
844	{	1117	{
845	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)	1118	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
846	{	1119	{
847	struct ev_periodic *w = periodics [0];	1120	ev_periodic *w = periodics [0];
848		1121
849	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	1122	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
850		1123
851	/* first reschedule or stop timer */	1124	/* first reschedule or stop timer */
852	if (w->interval)	1125	if (w->reschedule_cb)
853	{	1126	{
		1127	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1128	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1129	downheap ((WT *)periodics, periodiccnt, 0);
		1130	}
		1131	else if (w->interval)
		1132	{
854	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;	1133	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
855	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));	1134	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
856	downheap ((WT *)periodics, periodiccnt, 0);	1135	downheap ((WT *)periodics, periodiccnt, 0);
857	}	1136	}
858	else	1137	else
859	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1138	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
860		1139
861	event (EV_A_ (W)w, EV_PERIODIC);	1140	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
862	}	1141	}
863	}	1142	}
864		1143
865	static void	1144	static void
866	periodics_reschedule (EV_P)	1145	periodics_reschedule (EV_P)
…		…
868	int i;	1147	int i;
869		1148
870	/* adjust periodics after time jump */	1149	/* adjust periodics after time jump */
871	for (i = 0; i < periodiccnt; ++i)	1150	for (i = 0; i < periodiccnt; ++i)
872	{	1151	{
873	struct ev_periodic *w = periodics [i];	1152	ev_periodic *w = periodics [i];
874		1153
		1154	if (w->reschedule_cb)
		1155	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
875	if (w->interval)	1156	else if (w->interval)
876	{
877	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;	1157	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
878
879	if (fabs (diff) >= 1e-4)
880	{
881	ev_periodic_stop (EV_A_ w);
882	ev_periodic_start (EV_A_ w);
883
884	i = 0; /* restart loop, inefficient, but time jumps should be rare */
885	}
886	}
887	}	1158	}
		1159
		1160	/* now rebuild the heap */
		1161	for (i = periodiccnt >> 1; i--; )
		1162	downheap ((WT *)periodics, periodiccnt, i);
888	}	1163	}
		1164	#endif
889		1165
890	inline int	1166	inline int
891	time_update_monotonic (EV_P)	1167	time_update_monotonic (EV_P)
892	{	1168	{
893	mn_now = get_clock ();	1169	mn_now = get_clock ();
894		1170
895	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1171	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
896	{	1172	{
897	rt_now = rtmn_diff + mn_now;	1173	ev_rt_now = rtmn_diff + mn_now;
898	return 0;	1174	return 0;
899	}	1175	}
900	else	1176	else
901	{	1177	{
902	now_floor = mn_now;	1178	now_floor = mn_now;
903	rt_now = ev_time ();	1179	ev_rt_now = ev_time ();
904	return 1;	1180	return 1;
905	}	1181	}
906	}	1182	}
907		1183
908	static void	1184	inline void
909	time_update (EV_P)	1185	time_update (EV_P)
910	{	1186	{
911	int i;	1187	int i;
912		1188
913	#if EV_USE_MONOTONIC	1189	#if EV_USE_MONOTONIC
…		…
915	{	1191	{
916	if (time_update_monotonic (EV_A))	1192	if (time_update_monotonic (EV_A))
917	{	1193	{
918	ev_tstamp odiff = rtmn_diff;	1194	ev_tstamp odiff = rtmn_diff;
919		1195
920	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1196	/* loop a few times, before making important decisions.
		1197	* on the choice of "4": one iteration isn't enough,
		1198	* in case we get preempted during the calls to
		1199	* ev_time and get_clock. a second call is almost guarenteed
		1200	* to succeed in that case, though. and looping a few more times
		1201	* doesn't hurt either as we only do this on time-jumps or
		1202	* in the unlikely event of getting preempted here.
		1203	*/
		1204	for (i = 4; --i; )
921	{	1205	{
922	rtmn_diff = rt_now - mn_now;	1206	rtmn_diff = ev_rt_now - mn_now;
923		1207
924	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1208	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
925	return; /* all is well */	1209	return; /* all is well */
926		1210
927	rt_now = ev_time ();	1211	ev_rt_now = ev_time ();
928	mn_now = get_clock ();	1212	mn_now = get_clock ();
929	now_floor = mn_now;	1213	now_floor = mn_now;
930	}	1214	}
931		1215
		1216	# if EV_PERIODICS
932	periodics_reschedule (EV_A);	1217	periodics_reschedule (EV_A);
		1218	# endif
933	/* no timer adjustment, as the monotonic clock doesn't jump */	1219	/* no timer adjustment, as the monotonic clock doesn't jump */
934	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */	1220	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
935	}	1221	}
936	}	1222	}
937	else	1223	else
938	#endif	1224	#endif
939	{	1225	{
940	rt_now = ev_time ();	1226	ev_rt_now = ev_time ();
941		1227
942	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1228	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
943	{	1229	{
		1230	#if EV_PERIODICS
944	periodics_reschedule (EV_A);	1231	periodics_reschedule (EV_A);
		1232	#endif
945		1233
946	/* adjust timers. this is easy, as the offset is the same for all */	1234	/* adjust timers. this is easy, as the offset is the same for all */
947	for (i = 0; i < timercnt; ++i)	1235	for (i = 0; i < timercnt; ++i)
948	((WT)timers [i])->at += rt_now - mn_now;	1236	((WT)timers [i])->at += ev_rt_now - mn_now;
949	}	1237	}
950		1238
951	mn_now = rt_now;	1239	mn_now = ev_rt_now;
952	}	1240	}
953	}	1241	}
954		1242
955	void	1243	void
956	ev_ref (EV_P)	1244	ev_ref (EV_P)
…		…
967	static int loop_done;	1255	static int loop_done;
968		1256
969	void	1257	void
970	ev_loop (EV_P_ int flags)	1258	ev_loop (EV_P_ int flags)
971	{	1259	{
972	double block;
973	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1260	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1261	? EVUNLOOP_ONE
		1262	: EVUNLOOP_CANCEL;
974		1263
975	do	1264	while (activecnt)
976	{	1265	{
977	/* queue check watchers (and execute them) */	1266	/* queue check watchers (and execute them) */
978	if (expect_false (preparecnt))	1267	if (expect_false (preparecnt))
979	{	1268	{
980	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1269	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
981	call_pending (EV_A);	1270	call_pending (EV_A);
982	}	1271	}
983		1272
		1273	/* we might have forked, so reify kernel state if necessary */
		1274	if (expect_false (postfork))
		1275	loop_fork (EV_A);
		1276
984	/* update fd-related kernel structures */	1277	/* update fd-related kernel structures */
985	fd_reify (EV_A);	1278	fd_reify (EV_A);
986		1279
987	/* calculate blocking time */	1280	/* calculate blocking time */
		1281	{
		1282	double block;
988		1283
989	/* we only need this for !monotonic clockor timers, but as we basically	1284	if (flags & EVLOOP_NONBLOCK || idlecnt)
990	always have timers, we just calculate it always */	1285	block = 0.; /* do not block at all */
		1286	else
		1287	{
		1288	/* update time to cancel out callback processing overhead */
991	#if EV_USE_MONOTONIC	1289	#if EV_USE_MONOTONIC
992	if (expect_true (have_monotonic))	1290	if (expect_true (have_monotonic))
993	time_update_monotonic (EV_A);	1291	time_update_monotonic (EV_A);
994	else	1292	else
995	#endif	1293	#endif
996	{	1294	{
997	rt_now = ev_time ();	1295	ev_rt_now = ev_time ();
998	mn_now = rt_now;	1296	mn_now = ev_rt_now;
999	}	1297	}
1000		1298
1001	if (flags & EVLOOP_NONBLOCK || idlecnt)
1002	block = 0.;
1003	else
1004	{
1005	block = MAX_BLOCKTIME;	1299	block = MAX_BLOCKTIME;
1006		1300
1007	if (timercnt)	1301	if (timercnt)
1008	{	1302	{
1009	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;	1303	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
1010	if (block > to) block = to;	1304	if (block > to) block = to;
1011	}	1305	}
1012		1306
		1307	#if EV_PERIODICS
1013	if (periodiccnt)	1308	if (periodiccnt)
1014	{	1309	{
1015	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;	1310	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
1016	if (block > to) block = to;	1311	if (block > to) block = to;
1017	}	1312	}
		1313	#endif
1018		1314
1019	if (block < 0.) block = 0.;	1315	if (expect_false (block < 0.)) block = 0.;
1020	}	1316	}
1021		1317
1022	method_poll (EV_A_ block);	1318	backend_poll (EV_A_ block);
		1319	}
1023		1320
1024	/* update rt_now, do magic */	1321	/* update ev_rt_now, do magic */
1025	time_update (EV_A);	1322	time_update (EV_A);
1026		1323
1027	/* queue pending timers and reschedule them */	1324	/* queue pending timers and reschedule them */
1028	timers_reify (EV_A); /* relative timers called last */	1325	timers_reify (EV_A); /* relative timers called last */
		1326	#if EV_PERIODICS
1029	periodics_reify (EV_A); /* absolute timers called first */	1327	periodics_reify (EV_A); /* absolute timers called first */
		1328	#endif
1030		1329
1031	/* queue idle watchers unless io or timers are pending */	1330	/* queue idle watchers unless other events are pending */
1032	if (!pendingcnt)	1331	if (idlecnt && !any_pending (EV_A))
1033	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	1332	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
1034		1333
1035	/* queue check watchers, to be executed first */	1334	/* queue check watchers, to be executed first */
1036	if (checkcnt)	1335	if (expect_false (checkcnt))
1037	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1336	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1038		1337
1039	call_pending (EV_A);	1338	call_pending (EV_A);
1040	}
1041	while (activecnt && !loop_done);
1042		1339
1043	if (loop_done != 2)	1340	if (expect_false (loop_done))
1044	loop_done = 0;	1341	break;
		1342	}
		1343
		1344	if (loop_done == EVUNLOOP_ONE)
		1345	loop_done = EVUNLOOP_CANCEL;
1045	}	1346	}
1046		1347
1047	void	1348	void
1048	ev_unloop (EV_P_ int how)	1349	ev_unloop (EV_P_ int how)
1049	{	1350	{
…		…
1102	}	1403	}
1103		1404
1104	/*****************************************************************************/	1405	/*****************************************************************************/
1105		1406
1106	void	1407	void
1107	ev_io_start (EV_P_ struct ev_io *w)	1408	ev_io_start (EV_P_ ev_io *w)
1108	{	1409	{
1109	int fd = w->fd;	1410	int fd = w->fd;
1110		1411
1111	if (ev_is_active (w))	1412	if (expect_false (ev_is_active (w)))
1112	return;	1413	return;
1113		1414
1114	assert (("ev_io_start called with negative fd", fd >= 0));	1415	assert (("ev_io_start called with negative fd", fd >= 0));
1115		1416
1116	ev_start (EV_A_ (W)w, 1);	1417	ev_start (EV_A_ (W)w, 1);
1117	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1418	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1118	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1419	wlist_add ((WL *)&anfds[fd].head, (WL)w);
1119		1420
1120	fd_change (EV_A_ fd);	1421	fd_change (EV_A_ fd);
1121	}	1422	}
1122		1423
1123	void	1424	void
1124	ev_io_stop (EV_P_ struct ev_io *w)	1425	ev_io_stop (EV_P_ ev_io *w)
1125	{	1426	{
1126	ev_clear_pending (EV_A_ (W)w);	1427	ev_clear_pending (EV_A_ (W)w);
1127	if (!ev_is_active (w))	1428	if (expect_false (!ev_is_active (w)))
1128	return;	1429	return;
		1430
		1431	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1129		1432
1130	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1433	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
1131	ev_stop (EV_A_ (W)w);	1434	ev_stop (EV_A_ (W)w);
1132		1435
1133	fd_change (EV_A_ w->fd);	1436	fd_change (EV_A_ w->fd);
1134	}	1437	}
1135		1438
1136	void	1439	void
1137	ev_timer_start (EV_P_ struct ev_timer *w)	1440	ev_timer_start (EV_P_ ev_timer *w)
1138	{	1441	{
1139	if (ev_is_active (w))	1442	if (expect_false (ev_is_active (w)))
1140	return;	1443	return;
1141		1444
1142	((WT)w)->at += mn_now;	1445	((WT)w)->at += mn_now;
1143		1446
1144	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1447	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1145		1448
1146	ev_start (EV_A_ (W)w, ++timercnt);	1449	ev_start (EV_A_ (W)w, ++timercnt);
1147	array_needsize (timers, timermax, timercnt, );	1450	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
1148	timers [timercnt - 1] = w;	1451	timers [timercnt - 1] = w;
1149	upheap ((WT *)timers, timercnt - 1);	1452	upheap ((WT *)timers, timercnt - 1);
1150		1453
1151	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	1454	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1152	}	1455	}
1153		1456
1154	void	1457	void
1155	ev_timer_stop (EV_P_ struct ev_timer *w)	1458	ev_timer_stop (EV_P_ ev_timer *w)
1156	{	1459	{
1157	ev_clear_pending (EV_A_ (W)w);	1460	ev_clear_pending (EV_A_ (W)w);
1158	if (!ev_is_active (w))	1461	if (expect_false (!ev_is_active (w)))
1159	return;	1462	return;
1160		1463
1161	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	1464	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1162		1465
1163	if (((W)w)->active < timercnt--)	1466	if (expect_true (((W)w)->active < timercnt--))
1164	{	1467	{
1165	timers [((W)w)->active - 1] = timers [timercnt];	1468	timers [((W)w)->active - 1] = timers [timercnt];
1166	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);	1469	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1167	}	1470	}
1168		1471
1169	((WT)w)->at = w->repeat;	1472	((WT)w)->at -= mn_now;
1170		1473
1171	ev_stop (EV_A_ (W)w);	1474	ev_stop (EV_A_ (W)w);
1172	}	1475	}
1173		1476
1174	void	1477	void
1175	ev_timer_again (EV_P_ struct ev_timer *w)	1478	ev_timer_again (EV_P_ ev_timer *w)
1176	{	1479	{
1177	if (ev_is_active (w))	1480	if (ev_is_active (w))
1178	{	1481	{
1179	if (w->repeat)	1482	if (w->repeat)
1180	{	1483	{
1181	((WT)w)->at = mn_now + w->repeat;	1484	((WT)w)->at = mn_now + w->repeat;
1182	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);	1485	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1183	}	1486	}
1184	else	1487	else
1185	ev_timer_stop (EV_A_ w);	1488	ev_timer_stop (EV_A_ w);
1186	}	1489	}
1187	else if (w->repeat)	1490	else if (w->repeat)
		1491	{
		1492	w->at = w->repeat;
1188	ev_timer_start (EV_A_ w);	1493	ev_timer_start (EV_A_ w);
		1494	}
1189	}	1495	}
1190		1496
		1497	#if EV_PERIODICS
1191	void	1498	void
1192	ev_periodic_start (EV_P_ struct ev_periodic *w)	1499	ev_periodic_start (EV_P_ ev_periodic *w)
1193	{	1500	{
1194	if (ev_is_active (w))	1501	if (expect_false (ev_is_active (w)))
1195	return;	1502	return;
1196		1503
		1504	if (w->reschedule_cb)
		1505	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1506	else if (w->interval)
		1507	{
1197	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1508	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1198
1199	/* this formula differs from the one in periodic_reify because we do not always round up */	1509	/* this formula differs from the one in periodic_reify because we do not always round up */
1200	if (w->interval)
1201	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;	1510	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1511	}
1202		1512
1203	ev_start (EV_A_ (W)w, ++periodiccnt);	1513	ev_start (EV_A_ (W)w, ++periodiccnt);
1204	array_needsize (periodics, periodicmax, periodiccnt, );	1514	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
1205	periodics [periodiccnt - 1] = w;	1515	periodics [periodiccnt - 1] = w;
1206	upheap ((WT *)periodics, periodiccnt - 1);	1516	upheap ((WT *)periodics, periodiccnt - 1);
1207		1517
1208	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	1518	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1209	}	1519	}
1210		1520
1211	void	1521	void
1212	ev_periodic_stop (EV_P_ struct ev_periodic *w)	1522	ev_periodic_stop (EV_P_ ev_periodic *w)
1213	{	1523	{
1214	ev_clear_pending (EV_A_ (W)w);	1524	ev_clear_pending (EV_A_ (W)w);
1215	if (!ev_is_active (w))	1525	if (expect_false (!ev_is_active (w)))
1216	return;	1526	return;
1217		1527
1218	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	1528	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1219		1529
1220	if (((W)w)->active < periodiccnt--)	1530	if (expect_true (((W)w)->active < periodiccnt--))
1221	{	1531	{
1222	periodics [((W)w)->active - 1] = periodics [periodiccnt];	1532	periodics [((W)w)->active - 1] = periodics [periodiccnt];
1223	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	1533	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
1224	}	1534	}
1225		1535
1226	ev_stop (EV_A_ (W)w);	1536	ev_stop (EV_A_ (W)w);
1227	}	1537	}
1228		1538
1229	void	1539	void
		1540	ev_periodic_again (EV_P_ ev_periodic *w)
		1541	{
		1542	/* TODO: use adjustheap and recalculation */
		1543	ev_periodic_stop (EV_A_ w);
		1544	ev_periodic_start (EV_A_ w);
		1545	}
		1546	#endif
		1547
		1548	void
1230	ev_idle_start (EV_P_ struct ev_idle *w)	1549	ev_idle_start (EV_P_ ev_idle *w)
1231	{	1550	{
1232	if (ev_is_active (w))	1551	if (expect_false (ev_is_active (w)))
1233	return;	1552	return;
1234		1553
1235	ev_start (EV_A_ (W)w, ++idlecnt);	1554	ev_start (EV_A_ (W)w, ++idlecnt);
1236	array_needsize (idles, idlemax, idlecnt, );	1555	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1237	idles [idlecnt - 1] = w;	1556	idles [idlecnt - 1] = w;
1238	}	1557	}
1239		1558
1240	void	1559	void
1241	ev_idle_stop (EV_P_ struct ev_idle *w)	1560	ev_idle_stop (EV_P_ ev_idle *w)
1242	{	1561	{
1243	ev_clear_pending (EV_A_ (W)w);	1562	ev_clear_pending (EV_A_ (W)w);
1244	if (ev_is_active (w))	1563	if (expect_false (!ev_is_active (w)))
1245	return;	1564	return;
1246		1565
		1566	{
		1567	int active = ((W)w)->active;
1247	idles [((W)w)->active - 1] = idles [--idlecnt];	1568	idles [active - 1] = idles [--idlecnt];
		1569	((W)idles [active - 1])->active = active;
		1570	}
		1571
1248	ev_stop (EV_A_ (W)w);	1572	ev_stop (EV_A_ (W)w);
1249	}	1573	}
1250		1574
1251	void	1575	void
1252	ev_prepare_start (EV_P_ struct ev_prepare *w)	1576	ev_prepare_start (EV_P_ ev_prepare *w)
1253	{	1577	{
1254	if (ev_is_active (w))	1578	if (expect_false (ev_is_active (w)))
1255	return;	1579	return;
1256		1580
1257	ev_start (EV_A_ (W)w, ++preparecnt);	1581	ev_start (EV_A_ (W)w, ++preparecnt);
1258	array_needsize (prepares, preparemax, preparecnt, );	1582	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1259	prepares [preparecnt - 1] = w;	1583	prepares [preparecnt - 1] = w;
1260	}	1584	}
1261		1585
1262	void	1586	void
1263	ev_prepare_stop (EV_P_ struct ev_prepare *w)	1587	ev_prepare_stop (EV_P_ ev_prepare *w)
1264	{	1588	{
1265	ev_clear_pending (EV_A_ (W)w);	1589	ev_clear_pending (EV_A_ (W)w);
1266	if (ev_is_active (w))	1590	if (expect_false (!ev_is_active (w)))
1267	return;	1591	return;
1268		1592
		1593	{
		1594	int active = ((W)w)->active;
1269	prepares [((W)w)->active - 1] = prepares [--preparecnt];	1595	prepares [active - 1] = prepares [--preparecnt];
		1596	((W)prepares [active - 1])->active = active;
		1597	}
		1598
1270	ev_stop (EV_A_ (W)w);	1599	ev_stop (EV_A_ (W)w);
1271	}	1600	}
1272		1601
1273	void	1602	void
1274	ev_check_start (EV_P_ struct ev_check *w)	1603	ev_check_start (EV_P_ ev_check *w)
1275	{	1604	{
1276	if (ev_is_active (w))	1605	if (expect_false (ev_is_active (w)))
1277	return;	1606	return;
1278		1607
1279	ev_start (EV_A_ (W)w, ++checkcnt);	1608	ev_start (EV_A_ (W)w, ++checkcnt);
1280	array_needsize (checks, checkmax, checkcnt, );	1609	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1281	checks [checkcnt - 1] = w;	1610	checks [checkcnt - 1] = w;
1282	}	1611	}
1283		1612
1284	void	1613	void
1285	ev_check_stop (EV_P_ struct ev_check *w)	1614	ev_check_stop (EV_P_ ev_check *w)
1286	{	1615	{
1287	ev_clear_pending (EV_A_ (W)w);	1616	ev_clear_pending (EV_A_ (W)w);
1288	if (ev_is_active (w))	1617	if (expect_false (!ev_is_active (w)))
1289	return;	1618	return;
1290		1619
		1620	{
		1621	int active = ((W)w)->active;
1291	checks [((W)w)->active - 1] = checks [--checkcnt];	1622	checks [active - 1] = checks [--checkcnt];
		1623	((W)checks [active - 1])->active = active;
		1624	}
		1625
1292	ev_stop (EV_A_ (W)w);	1626	ev_stop (EV_A_ (W)w);
1293	}	1627	}
1294		1628
1295	#ifndef SA_RESTART	1629	#ifndef SA_RESTART
1296	# define SA_RESTART 0	1630	# define SA_RESTART 0
1297	#endif	1631	#endif
1298		1632
1299	void	1633	void
1300	ev_signal_start (EV_P_ struct ev_signal *w)	1634	ev_signal_start (EV_P_ ev_signal *w)
1301	{	1635	{
1302	#if EV_MULTIPLICITY	1636	#if EV_MULTIPLICITY
1303	assert (("signal watchers are only supported in the default loop", loop == default_loop));	1637	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1304	#endif	1638	#endif
1305	if (ev_is_active (w))	1639	if (expect_false (ev_is_active (w)))
1306	return;	1640	return;
1307		1641
1308	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1642	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1309		1643
1310	ev_start (EV_A_ (W)w, 1);	1644	ev_start (EV_A_ (W)w, 1);
1311	array_needsize (signals, signalmax, w->signum, signals_init);	1645	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1312	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1646	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1313		1647
1314	if (!((WL)w)->next)	1648	if (!((WL)w)->next)
1315	{	1649	{
		1650	#if _WIN32
		1651	signal (w->signum, sighandler);
		1652	#else
1316	struct sigaction sa;	1653	struct sigaction sa;
1317	sa.sa_handler = sighandler;	1654	sa.sa_handler = sighandler;
1318	sigfillset (&sa.sa_mask);	1655	sigfillset (&sa.sa_mask);
1319	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	1656	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1320	sigaction (w->signum, &sa, 0);	1657	sigaction (w->signum, &sa, 0);
		1658	#endif
1321	}	1659	}
1322	}	1660	}
1323		1661
1324	void	1662	void
1325	ev_signal_stop (EV_P_ struct ev_signal *w)	1663	ev_signal_stop (EV_P_ ev_signal *w)
1326	{	1664	{
1327	ev_clear_pending (EV_A_ (W)w);	1665	ev_clear_pending (EV_A_ (W)w);
1328	if (!ev_is_active (w))	1666	if (expect_false (!ev_is_active (w)))
1329	return;	1667	return;
1330		1668
1331	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1669	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1332	ev_stop (EV_A_ (W)w);	1670	ev_stop (EV_A_ (W)w);
1333		1671
1334	if (!signals [w->signum - 1].head)	1672	if (!signals [w->signum - 1].head)
1335	signal (w->signum, SIG_DFL);	1673	signal (w->signum, SIG_DFL);
1336	}	1674	}
1337		1675
1338	void	1676	void
1339	ev_child_start (EV_P_ struct ev_child *w)	1677	ev_child_start (EV_P_ ev_child *w)
1340	{	1678	{
1341	#if EV_MULTIPLICITY	1679	#if EV_MULTIPLICITY
1342	assert (("child watchers are only supported in the default loop", loop == default_loop));	1680	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1343	#endif	1681	#endif
1344	if (ev_is_active (w))	1682	if (expect_false (ev_is_active (w)))
1345	return;	1683	return;
1346		1684
1347	ev_start (EV_A_ (W)w, 1);	1685	ev_start (EV_A_ (W)w, 1);
1348	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1686	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1349	}	1687	}
1350		1688
1351	void	1689	void
1352	ev_child_stop (EV_P_ struct ev_child *w)	1690	ev_child_stop (EV_P_ ev_child *w)
1353	{	1691	{
1354	ev_clear_pending (EV_A_ (W)w);	1692	ev_clear_pending (EV_A_ (W)w);
1355	if (ev_is_active (w))	1693	if (expect_false (!ev_is_active (w)))
1356	return;	1694	return;
1357		1695
1358	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1696	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1359	ev_stop (EV_A_ (W)w);	1697	ev_stop (EV_A_ (W)w);
1360	}	1698	}
1361		1699
		1700	#if EV_MULTIPLICITY
		1701	void
		1702	ev_embed_sweep (EV_P_ ev_embed *w)
		1703	{
		1704	ev_loop (w->loop, EVLOOP_NONBLOCK);
		1705	}
		1706
		1707	static void
		1708	embed_cb (EV_P_ ev_io *io, int revents)
		1709	{
		1710	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		1711
		1712	if (ev_cb (w))
		1713	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		1714	else
		1715	ev_embed_sweep (loop, w);
		1716	}
		1717
		1718	void
		1719	ev_embed_start (EV_P_ ev_embed *w)
		1720	{
		1721	if (expect_false (ev_is_active (w)))
		1722	return;
		1723
		1724	{
		1725	struct ev_loop *loop = w->loop;
		1726	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		1727	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		1728	}
		1729
		1730	ev_set_priority (&w->io, ev_priority (w));
		1731	ev_io_start (EV_A_ &w->io);
		1732	ev_start (EV_A_ (W)w, 1);
		1733	}
		1734
		1735	void
		1736	ev_embed_stop (EV_P_ ev_embed *w)
		1737	{
		1738	ev_clear_pending (EV_A_ (W)w);
		1739	if (expect_false (!ev_is_active (w)))
		1740	return;
		1741
		1742	ev_io_stop (EV_A_ &w->io);
		1743	ev_stop (EV_A_ (W)w);
		1744	}
		1745	#endif
		1746
1362	/*****************************************************************************/	1747	/*****************************************************************************/
1363		1748
1364	struct ev_once	1749	struct ev_once
1365	{	1750	{
1366	struct ev_io io;	1751	ev_io io;
1367	struct ev_timer to;	1752	ev_timer to;
1368	void (*cb)(int revents, void *arg);	1753	void (*cb)(int revents, void *arg);
1369	void *arg;	1754	void *arg;
1370	};	1755	};
1371		1756
1372	static void	1757	static void
…		…
1375	void (*cb)(int revents, void *arg) = once->cb;	1760	void (*cb)(int revents, void *arg) = once->cb;
1376	void *arg = once->arg;	1761	void *arg = once->arg;
1377		1762
1378	ev_io_stop (EV_A_ &once->io);	1763	ev_io_stop (EV_A_ &once->io);
1379	ev_timer_stop (EV_A_ &once->to);	1764	ev_timer_stop (EV_A_ &once->to);
1380	free (once);	1765	ev_free (once);
1381		1766
1382	cb (revents, arg);	1767	cb (revents, arg);
1383	}	1768	}
1384		1769
1385	static void	1770	static void
1386	once_cb_io (EV_P_ struct ev_io *w, int revents)	1771	once_cb_io (EV_P_ ev_io *w, int revents)
1387	{	1772	{
1388	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1773	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1389	}	1774	}
1390		1775
1391	static void	1776	static void
1392	once_cb_to (EV_P_ struct ev_timer *w, int revents)	1777	once_cb_to (EV_P_ ev_timer *w, int revents)
1393	{	1778	{
1394	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1779	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1395	}	1780	}
1396		1781
1397	void	1782	void
1398	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1783	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1399	{	1784	{
1400	struct ev_once *once = malloc (sizeof (struct ev_once));	1785	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1401		1786
1402	if (!once)	1787	if (expect_false (!once))
		1788	{
1403	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1789	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1404	else	1790	return;
1405	{	1791	}
		1792
1406	once->cb = cb;	1793	once->cb = cb;
1407	once->arg = arg;	1794	once->arg = arg;
1408		1795
1409	ev_watcher_init (&once->io, once_cb_io);	1796	ev_init (&once->io, once_cb_io);
1410	if (fd >= 0)	1797	if (fd >= 0)
1411	{	1798	{
1412	ev_io_set (&once->io, fd, events);	1799	ev_io_set (&once->io, fd, events);
1413	ev_io_start (EV_A_ &once->io);	1800	ev_io_start (EV_A_ &once->io);
1414	}	1801	}
1415		1802
1416	ev_watcher_init (&once->to, once_cb_to);	1803	ev_init (&once->to, once_cb_to);
1417	if (timeout >= 0.)	1804	if (timeout >= 0.)
1418	{	1805	{
1419	ev_timer_set (&once->to, timeout, 0.);	1806	ev_timer_set (&once->to, timeout, 0.);
1420	ev_timer_start (EV_A_ &once->to);	1807	ev_timer_start (EV_A_ &once->to);
1421	}
1422	}	1808	}
1423	}	1809	}
1424		1810
		1811	#ifdef __cplusplus
		1812	}
		1813	#endif
		1814

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