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Comparing libev/ev.c (file contents):
Revision 1.58 by root, Sun Nov 4 16:52:52 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	#ifndef EV_EMBED	31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
		37	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
32	# include "config.h"	40	# include "config.h"
		41	# endif
		42
		43	# if HAVE_CLOCK_GETTIME
		44	# ifndef EV_USE_MONOTONIC
		45	# define EV_USE_MONOTONIC 1
		46	# endif
		47	# ifndef EV_USE_REALTIME
		48	# define EV_USE_REALTIME 1
		49	# endif
		50	# else
		51	# ifndef EV_USE_MONOTONIC
		52	# define EV_USE_MONOTONIC 0
		53	# endif
		54	# ifndef EV_USE_REALTIME
		55	# define EV_USE_REALTIME 0
		56	# endif
		57	# endif
		58
		59	# ifndef EV_USE_SELECT
		60	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		61	# define EV_USE_SELECT 1
		62	# else
		63	# define EV_USE_SELECT 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_POLL
		68	# if HAVE_POLL && HAVE_POLL_H
		69	# define EV_USE_POLL 1
		70	# else
		71	# define EV_USE_POLL 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_EPOLL
		76	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		77	# define EV_USE_EPOLL 1
		78	# else
		79	# define EV_USE_EPOLL 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_KQUEUE
		84	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		85	# define EV_USE_KQUEUE 1
		86	# else
		87	# define EV_USE_KQUEUE 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_PORT
		92	# if HAVE_PORT_H && HAVE_PORT_CREATE
		93	# define EV_USE_PORT 1
		94	# else
		95	# define EV_USE_PORT 0
		96	# endif
		97	# endif
		98
33	#endif	99	#endif
34		100
35	#include <math.h>	101	#include <math.h>
36	#include <stdlib.h>	102	#include <stdlib.h>
37	#include <unistd.h>
38	#include <fcntl.h>	103	#include <fcntl.h>
39	#include <signal.h>
40	#include <stddef.h>	104	#include <stddef.h>
41		105
42	#include <stdio.h>	106	#include <stdio.h>
43		107
44	#include <assert.h>	108	#include <assert.h>
45	#include <errno.h>	109	#include <errno.h>
46	#include <sys/types.h>	110	#include <sys/types.h>
		111	#include <time.h>
		112
		113	#include <signal.h>
		114
47	#ifndef WIN32	115	#ifndef _WIN32
		116	# include <unistd.h>
		117	# include <sys/time.h>
48	# 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
49	#endif	124	# endif
50	#include <sys/time.h>	125	#endif
51	#include <time.h>
52		126
53	/**/	127	/**/
54		128
55	#ifndef EV_USE_MONOTONIC	129	#ifndef EV_USE_MONOTONIC
56	# 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
57	#endif	135	#endif
58		136
59	#ifndef EV_USE_SELECT	137	#ifndef EV_USE_SELECT
60	# define EV_USE_SELECT 1	138	# define EV_USE_SELECT 1
61	#endif	139	#endif
62		140
63	#ifndef EV_USEV_POLL	141	#ifndef EV_USE_POLL
64	# define EV_USEV_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
65	#endif	147	#endif
66		148
67	#ifndef EV_USE_EPOLL	149	#ifndef EV_USE_EPOLL
68	# define EV_USE_EPOLL 0	150	# define EV_USE_EPOLL 0
69	#endif	151	#endif
70		152
71	#ifndef EV_USE_KQUEUE	153	#ifndef EV_USE_KQUEUE
72	# define EV_USE_KQUEUE 0	154	# define EV_USE_KQUEUE 0
73	#endif	155	#endif
74		156
75	#ifndef EV_USE_REALTIME	157	#ifndef EV_USE_PORT
76	# define EV_USE_REALTIME 1	158	# define EV_USE_PORT 0
77	#endif	159	#endif
78		160
79	/**/	161	/**/
80		162
81	#ifndef CLOCK_MONOTONIC	163	#ifndef CLOCK_MONOTONIC
…		…
86	#ifndef CLOCK_REALTIME	168	#ifndef CLOCK_REALTIME
87	# undef EV_USE_REALTIME	169	# undef EV_USE_REALTIME
88	# define EV_USE_REALTIME 0	170	# define EV_USE_REALTIME 0
89	#endif	171	#endif
90		172
		173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
		175	#endif
		176
91	/**/	177	/**/
92		178
93	#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) */
94	#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) */
95	#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 */
96	/*#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 */
97		183
98	#ifndef EV_EMBED	184	#ifdef EV_H
		185	# include EV_H
		186	#else
99	# include "ev.h"	187	# include "ev.h"
100	#endif	188	#endif
101		189
102	#if __GNUC__ >= 3	190	#if __GNUC__ >= 3
103	# define expect(expr,value) __builtin_expect ((expr),(value))	191	# define expect(expr,value) __builtin_expect ((expr),(value))
104	# define inline inline	192	# define inline static inline
105	#else	193	#else
106	# define expect(expr,value) (expr)	194	# define expect(expr,value) (expr)
107	# define inline static	195	# define inline static
108	#endif	196	#endif
109		197
…		…
111	#define expect_true(expr) expect ((expr) != 0, 1)	199	#define expect_true(expr) expect ((expr) != 0, 1)
112		200
113	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	201	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
114	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	202	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
115		203
		204	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		205	#define EMPTY2(a,b) /* used to suppress some warnings */
		206
116	typedef struct ev_watcher *W;	207	typedef ev_watcher *W;
117	typedef struct ev_watcher_list *WL;	208	typedef ev_watcher_list *WL;
118	typedef struct ev_watcher_time *WT;	209	typedef ev_watcher_time *WT;
119		210
120	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	211	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
121		212
		213	#ifdef _WIN32
		214	# include "ev_win32.c"
		215	#endif
		216
122	/*****************************************************************************/	217	/*****************************************************************************/
123		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
124	typedef struct	267	typedef struct
125	{	268	{
126	struct ev_watcher_list *head;	269	WL head;
127	unsigned char events;	270	unsigned char events;
128	unsigned char reify;	271	unsigned char reify;
		272	#if EV_SELECT_IS_WINSOCKET
		273	SOCKET handle;
		274	#endif
129	} ANFD;	275	} ANFD;
130		276
131	typedef struct	277	typedef struct
132	{	278	{
133	W w;	279	W w;
134	int events;	280	int events;
135	} ANPENDING;	281	} ANPENDING;
136		282
137	#if EV_MULTIPLICITY	283	#if EV_MULTIPLICITY
138		284
139	struct ev_loop	285	struct ev_loop
140	{	286	{
		287	ev_tstamp ev_rt_now;
		288	#define ev_rt_now ((loop)->ev_rt_now)
141	# define VAR(name,decl) decl;	289	#define VAR(name,decl) decl;
142	# include "ev_vars.h"	290	#include "ev_vars.h"
143	};
144	# undef VAR	291	#undef VAR
		292	};
145	# 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;
146		297
147	#else	298	#else
148		299
		300	ev_tstamp ev_rt_now;
149	# define VAR(name,decl) static decl;	301	#define VAR(name,decl) static decl;
150	# include "ev_vars.h"	302	#include "ev_vars.h"
151	# undef VAR	303	#undef VAR
		304
		305	static int ev_default_loop_ptr;
152		306
153	#endif	307	#endif
154		308
155	/*****************************************************************************/	309	/*****************************************************************************/
156		310
157	inline ev_tstamp	311	ev_tstamp
158	ev_time (void)	312	ev_time (void)
159	{	313	{
160	#if EV_USE_REALTIME	314	#if EV_USE_REALTIME
161	struct timespec ts;	315	struct timespec ts;
162	clock_gettime (CLOCK_REALTIME, &ts);	316	clock_gettime (CLOCK_REALTIME, &ts);
…		…
181	#endif	335	#endif
182		336
183	return ev_time ();	337	return ev_time ();
184	}	338	}
185		339
		340	#if EV_MULTIPLICITY
186	ev_tstamp	341	ev_tstamp
187	ev_now (EV_P)	342	ev_now (EV_P)
188	{	343	{
189	return rt_now;	344	return ev_rt_now;
190	}	345	}
		346	#endif
191		347
192	#define array_roundsize(base,n) ((n) | 4 & ~3)	348	#define array_roundsize(type,n) (((n) | 4) & ~3)
193		349
194	#define array_needsize(base,cur,cnt,init) \	350	#define array_needsize(type,base,cur,cnt,init) \
195	if (expect_false ((cnt) > cur)) \	351	if (expect_false ((cnt) > cur)) \
196	{ \	352	{ \
197	int newcnt = cur; \	353	int newcnt = cur; \
198	do \	354	do \
199	{ \	355	{ \
200	newcnt = array_roundsize (base, newcnt << 1); \	356	newcnt = array_roundsize (type, newcnt << 1); \
201	} \	357	} \
202	while ((cnt) > newcnt); \	358	while ((cnt) > newcnt); \
203	\	359	\
204	base = realloc (base, sizeof (*base) * (newcnt)); \	360	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
205	init (base + cur, newcnt - cur); \	361	init (base + cur, newcnt - cur); \
206	cur = newcnt; \	362	cur = newcnt; \
207	}	363	}
		364
		365	#define array_slim(type,stem) \
		366	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		367	{ \
		368	stem ## max = array_roundsize (stem ## cnt >> 1); \
		369	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		370	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		371	}
		372
		373	#define array_free(stem, idx) \
		374	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
208		375
209	/*****************************************************************************/	376	/*****************************************************************************/
210		377
211	static void	378	static void
212	anfds_init (ANFD *base, int count)	379	anfds_init (ANFD *base, int count)
…		…
219		386
220	++base;	387	++base;
221	}	388	}
222	}	389	}
223		390
224	static void	391	void
225	event (EV_P_ W w, int events)	392	ev_feed_event (EV_P_ void *w, int revents)
226	{	393	{
227	if (w->pending)	394	W w_ = (W)w;
		395
		396	if (expect_false (w_->pending))
228	{	397	{
229	pendings [ABSPRI (w)][w->pending - 1].events |= events;	398	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
230	return;	399	return;
231	}	400	}
232		401
233	w->pending = ++pendingcnt [ABSPRI (w)];	402	w_->pending = ++pendingcnt [ABSPRI (w_)];
234	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);
235	pendings [ABSPRI (w)][w->pending - 1].w = w;	404	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
236	pendings [ABSPRI (w)][w->pending - 1].events = events;	405	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
237	}	406	}
238		407
239	static void	408	static void
240	queue_events (EV_P_ W *events, int eventcnt, int type)	409	queue_events (EV_P_ W *events, int eventcnt, int type)
241	{	410	{
242	int i;	411	int i;
243		412
244	for (i = 0; i < eventcnt; ++i)	413	for (i = 0; i < eventcnt; ++i)
245	event (EV_A_ events [i], type);	414	ev_feed_event (EV_A_ events [i], type);
246	}	415	}
247		416
248	static void	417	inline void
249	fd_event (EV_P_ int fd, int events)	418	fd_event (EV_P_ int fd, int revents)
250	{	419	{
251	ANFD *anfd = anfds + fd;	420	ANFD *anfd = anfds + fd;
252	struct ev_io *w;	421	ev_io *w;
253		422
254	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)
255	{	424	{
256	int ev = w->events & events;	425	int ev = w->events & revents;
257		426
258	if (ev)	427	if (ev)
259	event (EV_A_ (W)w, ev);	428	ev_feed_event (EV_A_ (W)w, ev);
260	}	429	}
		430	}
		431
		432	void
		433	ev_feed_fd_event (EV_P_ int fd, int revents)
		434	{
		435	fd_event (EV_A_ fd, revents);
261	}	436	}
262		437
263	/*****************************************************************************/	438	/*****************************************************************************/
264		439
265	static void	440	inline void
266	fd_reify (EV_P)	441	fd_reify (EV_P)
267	{	442	{
268	int i;	443	int i;
269		444
270	for (i = 0; i < fdchangecnt; ++i)	445	for (i = 0; i < fdchangecnt; ++i)
271	{	446	{
272	int fd = fdchanges [i];	447	int fd = fdchanges [i];
273	ANFD *anfd = anfds + fd;	448	ANFD *anfd = anfds + fd;
274	struct ev_io *w;	449	ev_io *w;
275		450
276	int events = 0;	451	int events = 0;
277		452
278	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)
279	events |= w->events;	454	events |= w->events;
280		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
281	anfd->reify = 0;	465	anfd->reify = 0;
282		466
283	if (anfd->events != events)
284	{
285	method_modify (EV_A_ fd, anfd->events, events);	467	backend_modify (EV_A_ fd, anfd->events, events);
286	anfd->events = events;	468	anfd->events = events;
287	}
288	}	469	}
289		470
290	fdchangecnt = 0;	471	fdchangecnt = 0;
291	}	472	}
292		473
293	static void	474	static void
294	fd_change (EV_P_ int fd)	475	fd_change (EV_P_ int fd)
295	{	476	{
296	if (anfds [fd].reify || fdchangecnt < 0)	477	if (expect_false (anfds [fd].reify))
297	return;	478	return;
298		479
299	anfds [fd].reify = 1;	480	anfds [fd].reify = 1;
300		481
301	++fdchangecnt;	482	++fdchangecnt;
302	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	483	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
303	fdchanges [fdchangecnt - 1] = fd;	484	fdchanges [fdchangecnt - 1] = fd;
304	}	485	}
305		486
306	static void	487	static void
307	fd_kill (EV_P_ int fd)	488	fd_kill (EV_P_ int fd)
308	{	489	{
309	struct ev_io *w;	490	ev_io *w;
310		491
311	while ((w = (struct ev_io *)anfds [fd].head))	492	while ((w = (ev_io *)anfds [fd].head))
312	{	493	{
313	ev_io_stop (EV_A_ w);	494	ev_io_stop (EV_A_ w);
314	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);
315	}	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
316	}	507	}
317		508
318	/* called on EBADF to verify fds */	509	/* called on EBADF to verify fds */
319	static void	510	static void
320	fd_ebadf (EV_P)	511	fd_ebadf (EV_P)
321	{	512	{
322	int fd;	513	int fd;
323		514
324	for (fd = 0; fd < anfdmax; ++fd)	515	for (fd = 0; fd < anfdmax; ++fd)
325	if (anfds [fd].events)	516	if (anfds [fd].events)
326	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	517	if (!fd_valid (fd) == -1 && errno == EBADF)
327	fd_kill (EV_A_ fd);	518	fd_kill (EV_A_ fd);
328	}	519	}
329		520
330	/* 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 */
331	static void	522	static void
332	fd_enomem (EV_P)	523	fd_enomem (EV_P)
333	{	524	{
334	int fd = anfdmax;	525	int fd;
335		526
336	while (fd--)	527	for (fd = anfdmax; fd--; )
337	if (anfds [fd].events)	528	if (anfds [fd].events)
338	{	529	{
339	close (fd);
340	fd_kill (EV_A_ fd);	530	fd_kill (EV_A_ fd);
341	return;	531	return;
342	}	532	}
343	}	533	}
344		534
345	/* 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 */
346	static void	536	static void
347	fd_rearm_all (EV_P)	537	fd_rearm_all (EV_P)
348	{	538	{
349	int fd;	539	int fd;
350		540
351	/* this should be highly optimised to not do anything but set a flag */	541	/* this should be highly optimised to not do anything but set a flag */
352	for (fd = 0; fd < anfdmax; ++fd)	542	for (fd = 0; fd < anfdmax; ++fd)
353	if (anfds [fd].events)	543	if (anfds [fd].events)
354	{	544	{
355	anfds [fd].events = 0;	545	anfds [fd].events = 0;
356	fd_change (fd);	546	fd_change (EV_A_ fd);
357	}	547	}
358	}	548	}
359		549
360	/*****************************************************************************/	550	/*****************************************************************************/
361		551
…		…
365	WT w = heap [k];	555	WT w = heap [k];
366		556
367	while (k && heap [k >> 1]->at > w->at)	557	while (k && heap [k >> 1]->at > w->at)
368	{	558	{
369	heap [k] = heap [k >> 1];	559	heap [k] = heap [k >> 1];
370	heap [k]->active = k + 1;	560	((W)heap [k])->active = k + 1;
371	k >>= 1;	561	k >>= 1;
372	}	562	}
373		563
374	heap [k] = w;	564	heap [k] = w;
375	heap [k]->active = k + 1;	565	((W)heap [k])->active = k + 1;
376		566
377	}	567	}
378		568
379	static void	569	static void
380	downheap (WT *heap, int N, int k)	570	downheap (WT *heap, int N, int k)
…		…
390		580
391	if (w->at <= heap [j]->at)	581	if (w->at <= heap [j]->at)
392	break;	582	break;
393		583
394	heap [k] = heap [j];	584	heap [k] = heap [j];
395	heap [k]->active = k + 1;	585	((W)heap [k])->active = k + 1;
396	k = j;	586	k = j;
397	}	587	}
398		588
399	heap [k] = w;	589	heap [k] = w;
400	heap [k]->active = k + 1;	590	((W)heap [k])->active = k + 1;
		591	}
		592
		593	inline void
		594	adjustheap (WT *heap, int N, int k)
		595	{
		596	upheap (heap, k);
		597	downheap (heap, N, k);
401	}	598	}
402		599
403	/*****************************************************************************/	600	/*****************************************************************************/
404		601
405	typedef struct	602	typedef struct
406	{	603	{
407	struct ev_watcher_list *head;	604	WL head;
408	sig_atomic_t volatile gotsig;	605	sig_atomic_t volatile gotsig;
409	} ANSIG;	606	} ANSIG;
410		607
411	static ANSIG *signals;	608	static ANSIG *signals;
412	static int signalmax;	609	static int signalmax;
413		610
414	static int sigpipe [2];	611	static int sigpipe [2];
415	static sig_atomic_t volatile gotsig;	612	static sig_atomic_t volatile gotsig;
		613	static ev_io sigev;
416		614
417	static void	615	static void
418	signals_init (ANSIG *base, int count)	616	signals_init (ANSIG *base, int count)
419	{	617	{
420	while (count--)	618	while (count--)
…		…
427	}	625	}
428		626
429	static void	627	static void
430	sighandler (int signum)	628	sighandler (int signum)
431	{	629	{
		630	#if _WIN32
		631	signal (signum, sighandler);
		632	#endif
		633
432	signals [signum - 1].gotsig = 1;	634	signals [signum - 1].gotsig = 1;
433		635
434	if (!gotsig)	636	if (!gotsig)
435	{	637	{
436	int old_errno = errno;	638	int old_errno = errno;
…		…
438	write (sigpipe [1], &signum, 1);	640	write (sigpipe [1], &signum, 1);
439	errno = old_errno;	641	errno = old_errno;
440	}	642	}
441	}	643	}
442		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
443	static void	665	static void
444	sigcb (EV_P_ struct ev_io *iow, int revents)	666	sigcb (EV_P_ ev_io *iow, int revents)
445	{	667	{
446	struct ev_watcher_list *w;
447	int signum;	668	int signum;
448		669
449	read (sigpipe [0], &revents, 1);	670	read (sigpipe [0], &revents, 1);
450	gotsig = 0;	671	gotsig = 0;
451		672
452	for (signum = signalmax; signum--; )	673	for (signum = signalmax; signum--; )
453	if (signals [signum].gotsig)	674	if (signals [signum].gotsig)
454	{	675	ev_feed_signal_event (EV_A_ signum + 1);
455	signals [signum].gotsig = 0;	676	}
456		677
457	for (w = signals [signum].head; w; w = w->next)	678	static void
458	event (EV_A_ (W)w, EV_SIGNAL);	679	fd_intern (int fd)
459	}	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
460	}	688	}
461		689
462	static void	690	static void
463	siginit (EV_P)	691	siginit (EV_P)
464	{	692	{
465	#ifndef WIN32	693	fd_intern (sigpipe [0]);
466	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	694	fd_intern (sigpipe [1]);
467	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
468
469	/* rather than sort out wether we really need nb, set it */
470	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
471	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
472	#endif
473		695
474	ev_io_set (&sigev, sigpipe [0], EV_READ);	696	ev_io_set (&sigev, sigpipe [0], EV_READ);
475	ev_io_start (EV_A_ &sigev);	697	ev_io_start (EV_A_ &sigev);
476	ev_unref (EV_A); /* child watcher should not keep loop alive */	698	ev_unref (EV_A); /* child watcher should not keep loop alive */
477	}	699	}
478		700
479	/*****************************************************************************/	701	/*****************************************************************************/
480		702
		703	static ev_child *childs [PID_HASHSIZE];
		704
481	#ifndef WIN32	705	#ifndef _WIN32
		706
		707	static ev_signal childev;
482		708
483	#ifndef WCONTINUED	709	#ifndef WCONTINUED
484	# define WCONTINUED 0	710	# define WCONTINUED 0
485	#endif	711	#endif
486		712
487	static void	713	static void
488	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)
489	{	715	{
490	struct ev_child *w;	716	ev_child *w;
491		717
492	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)
493	if (w->pid == pid || !w->pid)	719	if (w->pid == pid || !w->pid)
494	{	720	{
495	w->priority = sw->priority; /* need to do it *now* */	721	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
496	w->rpid = pid;	722	w->rpid = pid;
497	w->rstatus = status;	723	w->rstatus = status;
498	event (EV_A_ (W)w, EV_CHILD);	724	ev_feed_event (EV_A_ (W)w, EV_CHILD);
499	}	725	}
500	}	726	}
501		727
502	static void	728	static void
503	childcb (EV_P_ struct ev_signal *sw, int revents)	729	childcb (EV_P_ ev_signal *sw, int revents)
504	{	730	{
505	int pid, status;	731	int pid, status;
506		732
507	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	733	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
508	{	734	{
509	/* 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 */
510	event (EV_A_ (W)sw, EV_SIGNAL);	737	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
511		738
512	child_reap (EV_A_ sw, pid, pid, status);	739	child_reap (EV_A_ sw, pid, pid, status);
513	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 */
514	}	741	}
515	}	742	}
516		743
517	#endif	744	#endif
518		745
519	/*****************************************************************************/	746	/*****************************************************************************/
520		747
		748	#if EV_USE_PORT
		749	# include "ev_port.c"
		750	#endif
521	#if EV_USE_KQUEUE	751	#if EV_USE_KQUEUE
522	# include "ev_kqueue.c"	752	# include "ev_kqueue.c"
523	#endif	753	#endif
524	#if EV_USE_EPOLL	754	#if EV_USE_EPOLL
525	# include "ev_epoll.c"	755	# include "ev_epoll.c"
526	#endif	756	#endif
527	#if EV_USEV_POLL	757	#if EV_USE_POLL
528	# include "ev_poll.c"	758	# include "ev_poll.c"
529	#endif	759	#endif
530	#if EV_USE_SELECT	760	#if EV_USE_SELECT
531	# include "ev_select.c"	761	# include "ev_select.c"
532	#endif	762	#endif
…		…
545		775
546	/* 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 */
547	static int	777	static int
548	enable_secure (void)	778	enable_secure (void)
549	{	779	{
550	#ifdef WIN32	780	#ifdef _WIN32
551	return 0;	781	return 0;
552	#else	782	#else
553	return getuid () != geteuid ()	783	return getuid () != geteuid ()
554	|| getgid () != getegid ();	784	|| getgid () != getegid ();
555	#endif	785	#endif
556	}	786	}
557		787
558	int	788	unsigned int
559	ev_method (EV_P)	789	ev_supported_backends (void)
560	{	790	{
561	return method;	791	unsigned int flags = 0;
562	}
563		792
564	static void	793	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
565	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)
566	{	804	{
567	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)
568	{	838	{
569	#if EV_USE_MONOTONIC	839	#if EV_USE_MONOTONIC
570	{	840	{
571	struct timespec ts;	841	struct timespec ts;
572	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	842	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
573	have_monotonic = 1;	843	have_monotonic = 1;
574	}	844	}
575	#endif	845	#endif
576		846
577	rt_now = ev_time ();	847	ev_rt_now = ev_time ();
578	mn_now = get_clock ();	848	mn_now = get_clock ();
579	now_floor = mn_now;	849	now_floor = mn_now;
580	rtmn_diff = rt_now - mn_now;	850	rtmn_diff = ev_rt_now - mn_now;
581		851
582	if (methods == EVMETHOD_AUTO)	852	if (!(flags & EVFLAG_NOENV)
583	if (!enable_secure () && getenv ("LIBEV_METHODS"))	853	&& !enable_secure ()
		854	&& getenv ("LIBEV_FLAGS"))
584	methods = atoi (getenv ("LIBEV_METHODS"));	855	flags = atoi (getenv ("LIBEV_FLAGS"));
585	else
586	methods = EVMETHOD_ANY;
587		856
588	method = 0;	857	if (!(flags & 0x0000ffffUL))
		858	flags |= ev_recommended_backends ();
		859
		860	backend = 0;
		861	#if EV_USE_PORT
		862	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		863	#endif
589	#if EV_USE_KQUEUE	864	#if EV_USE_KQUEUE
590	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);	865	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
591	#endif	866	#endif
592	#if EV_USE_EPOLL	867	#if EV_USE_EPOLL
593	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);	868	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
594	#endif	869	#endif
595	#if EV_USEV_POLL	870	#if EV_USE_POLL
596	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);	871	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
597	#endif	872	#endif
598	#if EV_USE_SELECT	873	#if EV_USE_SELECT
599	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);	874	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
600	#endif	875	#endif
601	}
602	}
603		876
604	void	877	ev_init (&sigev, sigcb);
		878	ev_set_priority (&sigev, EV_MAXPRI);
		879	}
		880	}
		881
		882	static void
605	loop_destroy (EV_P)	883	loop_destroy (EV_P)
606	{	884	{
		885	int i;
		886
		887	#if EV_USE_PORT
		888	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		889	#endif
607	#if EV_USE_KQUEUE	890	#if EV_USE_KQUEUE
608	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);	891	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
609	#endif	892	#endif
610	#if EV_USE_EPOLL	893	#if EV_USE_EPOLL
611	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);	894	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
612	#endif	895	#endif
613	#if EV_USEV_POLL	896	#if EV_USE_POLL
614	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);	897	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
615	#endif	898	#endif
616	#if EV_USE_SELECT	899	#if EV_USE_SELECT
617	if (method == EVMETHOD_SELECT) select_destroy (EV_A);	900	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
618	#endif	901	#endif
619		902
620	method = 0;	903	for (i = NUMPRI; i--; )
621	/*TODO*/	904	array_free (pending, [i]);
622	}
623		905
624	void	906	/* have to use the microsoft-never-gets-it-right macro */
		907	array_free (fdchange, EMPTY0);
		908	array_free (timer, EMPTY0);
		909	#if EV_PERIODICS
		910	array_free (periodic, EMPTY0);
		911	#endif
		912	array_free (idle, EMPTY0);
		913	array_free (prepare, EMPTY0);
		914	array_free (check, EMPTY0);
		915
		916	backend = 0;
		917	}
		918
		919	static void
625	loop_fork (EV_P)	920	loop_fork (EV_P)
626	{	921	{
627	/*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
628	#if EV_USE_EPOLL	928	#if EV_USE_EPOLL
629	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);	929	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
630	#endif	930	#endif
631	#if EV_USE_KQUEUE	931
632	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);	932	if (ev_is_active (&sigev))
633	#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;
634	}	948	}
635		949
636	#if EV_MULTIPLICITY	950	#if EV_MULTIPLICITY
637	struct ev_loop *	951	struct ev_loop *
638	ev_loop_new (int methods)	952	ev_loop_new (unsigned int flags)
639	{	953	{
640	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));
641		955
		956	memset (loop, 0, sizeof (struct ev_loop));
		957
642	loop_init (EV_A_ methods);	958	loop_init (EV_A_ flags);
643		959
644	if (ev_methods (EV_A))	960	if (ev_backend (EV_A))
645	return loop;	961	return loop;
646		962
647	return 0;	963	return 0;
648	}	964	}
649		965
650	void	966	void
651	ev_loop_destroy (EV_P)	967	ev_loop_destroy (EV_P)
652	{	968	{
653	loop_destroy (EV_A);	969	loop_destroy (EV_A);
654	free (loop);	970	ev_free (loop);
655	}	971	}
656		972
657	void	973	void
658	ev_loop_fork (EV_P)	974	ev_loop_fork (EV_P)
659	{	975	{
660	loop_fork (EV_A);	976	postfork = 1;
661	}	977	}
662		978
663	#endif	979	#endif
664		980
665	#if EV_MULTIPLICITY	981	#if EV_MULTIPLICITY
666	struct ev_loop default_loop_struct;
667	static struct ev_loop *default_loop;
668
669	struct ev_loop *	982	struct ev_loop *
		983	ev_default_loop_init (unsigned int flags)
670	#else	984	#else
671	static int default_loop;
672
673	int	985	int
		986	ev_default_loop (unsigned int flags)
674	#endif	987	#endif
675	ev_default_loop (int methods)
676	{	988	{
677	if (sigpipe [0] == sigpipe [1])	989	if (sigpipe [0] == sigpipe [1])
678	if (pipe (sigpipe))	990	if (pipe (sigpipe))
679	return 0;	991	return 0;
680		992
681	if (!default_loop)	993	if (!ev_default_loop_ptr)
682	{	994	{
683	#if EV_MULTIPLICITY	995	#if EV_MULTIPLICITY
684	struct ev_loop *loop = default_loop = &default_loop_struct;	996	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
685	#else	997	#else
686	default_loop = 1;	998	ev_default_loop_ptr = 1;
687	#endif	999	#endif
688		1000
689	loop_init (EV_A_ methods);	1001	loop_init (EV_A_ flags);
690		1002
691	if (ev_method (EV_A))	1003	if (ev_backend (EV_A))
692	{	1004	{
693	ev_watcher_init (&sigev, sigcb);
694	ev_set_priority (&sigev, EV_MAXPRI);
695	siginit (EV_A);	1005	siginit (EV_A);
696		1006
697	#ifndef WIN32	1007	#ifndef _WIN32
698	ev_signal_init (&childev, childcb, SIGCHLD);	1008	ev_signal_init (&childev, childcb, SIGCHLD);
699	ev_set_priority (&childev, EV_MAXPRI);	1009	ev_set_priority (&childev, EV_MAXPRI);
700	ev_signal_start (EV_A_ &childev);	1010	ev_signal_start (EV_A_ &childev);
701	ev_unref (EV_A); /* child watcher should not keep loop alive */	1011	ev_unref (EV_A); /* child watcher should not keep loop alive */
702	#endif	1012	#endif
703	}	1013	}
704	else	1014	else
705	default_loop = 0;	1015	ev_default_loop_ptr = 0;
706	}	1016	}
707		1017
708	return default_loop;	1018	return ev_default_loop_ptr;
709	}	1019	}
710		1020
711	void	1021	void
712	ev_default_destroy (void)	1022	ev_default_destroy (void)
713	{	1023	{
714	#if EV_MULTIPLICITY	1024	#if EV_MULTIPLICITY
715	struct ev_loop *loop = default_loop;	1025	struct ev_loop *loop = ev_default_loop_ptr;
716	#endif	1026	#endif
717		1027
		1028	#ifndef _WIN32
718	ev_ref (EV_A); /* child watcher */	1029	ev_ref (EV_A); /* child watcher */
719	ev_signal_stop (EV_A_ &childev);	1030	ev_signal_stop (EV_A_ &childev);
		1031	#endif
720		1032
721	ev_ref (EV_A); /* signal watcher */	1033	ev_ref (EV_A); /* signal watcher */
722	ev_io_stop (EV_A_ &sigev);	1034	ev_io_stop (EV_A_ &sigev);
723		1035
724	close (sigpipe [0]); sigpipe [0] = 0;	1036	close (sigpipe [0]); sigpipe [0] = 0;
…		…
726		1038
727	loop_destroy (EV_A);	1039	loop_destroy (EV_A);
728	}	1040	}
729		1041
730	void	1042	void
731	ev_default_fork (EV_P)	1043	ev_default_fork (void)
732	{	1044	{
733	loop_fork (EV_A);	1045	#if EV_MULTIPLICITY
		1046	struct ev_loop *loop = ev_default_loop_ptr;
		1047	#endif
734		1048
735	ev_io_stop (EV_A_ &sigev);	1049	if (backend)
736	close (sigpipe [0]);	1050	postfork = 1;
737	close (sigpipe [1]);
738	pipe (sigpipe);
739
740	ev_ref (EV_A); /* signal watcher */
741	siginit (EV_A);
742	}	1051	}
743		1052
744	/*****************************************************************************/	1053	/*****************************************************************************/
745		1054
746	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
747	call_pending (EV_P)	1068	call_pending (EV_P)
748	{	1069	{
749	int pri;	1070	int pri;
750		1071
751	for (pri = NUMPRI; pri--; )	1072	for (pri = NUMPRI; pri--; )
752	while (pendingcnt [pri])	1073	while (pendingcnt [pri])
753	{	1074	{
754	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1075	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
755		1076
756	if (p->w)	1077	if (expect_true (p->w))
757	{	1078	{
		1079	assert (("non-pending watcher on pending list", p->w->pending));
		1080
758	p->w->pending = 0;	1081	p->w->pending = 0;
759	p->w->cb (EV_A_ p->w, p->events);	1082	EV_CB_INVOKE (p->w, p->events);
760	}	1083	}
761	}	1084	}
762	}	1085	}
763		1086
764	static void	1087	inline void
765	timers_reify (EV_P)	1088	timers_reify (EV_P)
766	{	1089	{
767	while (timercnt && timers [0]->at <= mn_now)	1090	while (timercnt && ((WT)timers [0])->at <= mn_now)
768	{	1091	{
769	struct ev_timer *w = timers [0];	1092	ev_timer *w = timers [0];
		1093
		1094	assert (("inactive timer on timer heap detected", ev_is_active (w)));
770		1095
771	/* first reschedule or stop timer */	1096	/* first reschedule or stop timer */
772	if (w->repeat)	1097	if (w->repeat)
773	{	1098	{
774	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
775	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
776	downheap ((WT *)timers, timercnt, 0);	1105	downheap ((WT *)timers, timercnt, 0);
777	}	1106	}
778	else	1107	else
779	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1108	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
780		1109
781	event (EV_A_ (W)w, EV_TIMEOUT);	1110	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
782	}	1111	}
783	}	1112	}
784		1113
785	static void	1114	#if EV_PERIODICS
		1115	inline void
786	periodics_reify (EV_P)	1116	periodics_reify (EV_P)
787	{	1117	{
788	while (periodiccnt && periodics [0]->at <= rt_now)	1118	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
789	{	1119	{
790	struct ev_periodic *w = periodics [0];	1120	ev_periodic *w = periodics [0];
		1121
		1122	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
791		1123
792	/* first reschedule or stop timer */	1124	/* first reschedule or stop timer */
793	if (w->interval)	1125	if (w->reschedule_cb)
794	{	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	{
795	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;	1133	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
796	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));	1134	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
797	downheap ((WT *)periodics, periodiccnt, 0);	1135	downheap ((WT *)periodics, periodiccnt, 0);
798	}	1136	}
799	else	1137	else
800	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1138	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
801		1139
802	event (EV_A_ (W)w, EV_PERIODIC);	1140	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
803	}	1141	}
804	}	1142	}
805		1143
806	static void	1144	static void
807	periodics_reschedule (EV_P)	1145	periodics_reschedule (EV_P)
…		…
809	int i;	1147	int i;
810		1148
811	/* adjust periodics after time jump */	1149	/* adjust periodics after time jump */
812	for (i = 0; i < periodiccnt; ++i)	1150	for (i = 0; i < periodiccnt; ++i)
813	{	1151	{
814	struct ev_periodic *w = periodics [i];	1152	ev_periodic *w = periodics [i];
815		1153
		1154	if (w->reschedule_cb)
		1155	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
816	if (w->interval)	1156	else if (w->interval)
817	{
818	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;	1157	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
819
820	if (fabs (diff) >= 1e-4)
821	{
822	ev_periodic_stop (EV_A_ w);
823	ev_periodic_start (EV_A_ w);
824
825	i = 0; /* restart loop, inefficient, but time jumps should be rare */
826	}
827	}
828	}	1158	}
		1159
		1160	/* now rebuild the heap */
		1161	for (i = periodiccnt >> 1; i--; )
		1162	downheap ((WT *)periodics, periodiccnt, i);
829	}	1163	}
		1164	#endif
830		1165
831	inline int	1166	inline int
832	time_update_monotonic (EV_P)	1167	time_update_monotonic (EV_P)
833	{	1168	{
834	mn_now = get_clock ();	1169	mn_now = get_clock ();
835		1170
836	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1171	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
837	{	1172	{
838	rt_now = rtmn_diff + mn_now;	1173	ev_rt_now = rtmn_diff + mn_now;
839	return 0;	1174	return 0;
840	}	1175	}
841	else	1176	else
842	{	1177	{
843	now_floor = mn_now;	1178	now_floor = mn_now;
844	rt_now = ev_time ();	1179	ev_rt_now = ev_time ();
845	return 1;	1180	return 1;
846	}	1181	}
847	}	1182	}
848		1183
849	static void	1184	inline void
850	time_update (EV_P)	1185	time_update (EV_P)
851	{	1186	{
852	int i;	1187	int i;
853		1188
854	#if EV_USE_MONOTONIC	1189	#if EV_USE_MONOTONIC
…		…
856	{	1191	{
857	if (time_update_monotonic (EV_A))	1192	if (time_update_monotonic (EV_A))
858	{	1193	{
859	ev_tstamp odiff = rtmn_diff;	1194	ev_tstamp odiff = rtmn_diff;
860		1195
861	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; )
862	{	1205	{
863	rtmn_diff = rt_now - mn_now;	1206	rtmn_diff = ev_rt_now - mn_now;
864		1207
865	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1208	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
866	return; /* all is well */	1209	return; /* all is well */
867		1210
868	rt_now = ev_time ();	1211	ev_rt_now = ev_time ();
869	mn_now = get_clock ();	1212	mn_now = get_clock ();
870	now_floor = mn_now;	1213	now_floor = mn_now;
871	}	1214	}
872		1215
		1216	# if EV_PERIODICS
873	periodics_reschedule (EV_A);	1217	periodics_reschedule (EV_A);
		1218	# endif
874	/* no timer adjustment, as the monotonic clock doesn't jump */	1219	/* no timer adjustment, as the monotonic clock doesn't jump */
875	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */	1220	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
876	}	1221	}
877	}	1222	}
878	else	1223	else
879	#endif	1224	#endif
880	{	1225	{
881	rt_now = ev_time ();	1226	ev_rt_now = ev_time ();
882		1227
883	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))
884	{	1229	{
		1230	#if EV_PERIODICS
885	periodics_reschedule (EV_A);	1231	periodics_reschedule (EV_A);
		1232	#endif
886		1233
887	/* 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 */
888	for (i = 0; i < timercnt; ++i)	1235	for (i = 0; i < timercnt; ++i)
889	timers [i]->at += rt_now - mn_now;	1236	((WT)timers [i])->at += ev_rt_now - mn_now;
890	}	1237	}
891		1238
892	mn_now = rt_now;	1239	mn_now = ev_rt_now;
893	}	1240	}
894	}	1241	}
895		1242
896	void	1243	void
897	ev_ref (EV_P)	1244	ev_ref (EV_P)
…		…
908	static int loop_done;	1255	static int loop_done;
909		1256
910	void	1257	void
911	ev_loop (EV_P_ int flags)	1258	ev_loop (EV_P_ int flags)
912	{	1259	{
913	double block;
914	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1260	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1261	? EVUNLOOP_ONE
		1262	: EVUNLOOP_CANCEL;
915		1263
916	do	1264	while (activecnt)
917	{	1265	{
918	/* queue check watchers (and execute them) */	1266	/* queue check watchers (and execute them) */
919	if (expect_false (preparecnt))	1267	if (expect_false (preparecnt))
920	{	1268	{
921	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1269	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
922	call_pending (EV_A);	1270	call_pending (EV_A);
923	}	1271	}
924		1272
		1273	/* we might have forked, so reify kernel state if necessary */
		1274	if (expect_false (postfork))
		1275	loop_fork (EV_A);
		1276
925	/* update fd-related kernel structures */	1277	/* update fd-related kernel structures */
926	fd_reify (EV_A);	1278	fd_reify (EV_A);
927		1279
928	/* calculate blocking time */	1280	/* calculate blocking time */
		1281	{
		1282	double block;
929		1283
930	/* we only need this for !monotonic clockor timers, but as we basically	1284	if (flags & EVLOOP_NONBLOCK || idlecnt)
931	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 */
932	#if EV_USE_MONOTONIC	1289	#if EV_USE_MONOTONIC
933	if (expect_true (have_monotonic))	1290	if (expect_true (have_monotonic))
934	time_update_monotonic (EV_A);	1291	time_update_monotonic (EV_A);
935	else	1292	else
936	#endif	1293	#endif
937	{	1294	{
938	rt_now = ev_time ();	1295	ev_rt_now = ev_time ();
939	mn_now = rt_now;	1296	mn_now = ev_rt_now;
940	}	1297	}
941		1298
942	if (flags & EVLOOP_NONBLOCK || idlecnt)
943	block = 0.;
944	else
945	{
946	block = MAX_BLOCKTIME;	1299	block = MAX_BLOCKTIME;
947		1300
948	if (timercnt)	1301	if (timercnt)
949	{	1302	{
950	ev_tstamp to = timers [0]->at - mn_now + method_fudge;	1303	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
951	if (block > to) block = to;	1304	if (block > to) block = to;
952	}	1305	}
953		1306
		1307	#if EV_PERIODICS
954	if (periodiccnt)	1308	if (periodiccnt)
955	{	1309	{
956	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;	1310	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
957	if (block > to) block = to;	1311	if (block > to) block = to;
958	}	1312	}
		1313	#endif
959		1314
960	if (block < 0.) block = 0.;	1315	if (expect_false (block < 0.)) block = 0.;
961	}	1316	}
962		1317
963	method_poll (EV_A_ block);	1318	backend_poll (EV_A_ block);
		1319	}
964		1320
965	/* update rt_now, do magic */	1321	/* update ev_rt_now, do magic */
966	time_update (EV_A);	1322	time_update (EV_A);
967		1323
968	/* queue pending timers and reschedule them */	1324	/* queue pending timers and reschedule them */
969	timers_reify (EV_A); /* relative timers called last */	1325	timers_reify (EV_A); /* relative timers called last */
		1326	#if EV_PERIODICS
970	periodics_reify (EV_A); /* absolute timers called first */	1327	periodics_reify (EV_A); /* absolute timers called first */
		1328	#endif
971		1329
972	/* queue idle watchers unless io or timers are pending */	1330	/* queue idle watchers unless other events are pending */
973	if (!pendingcnt)	1331	if (idlecnt && !any_pending (EV_A))
974	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	1332	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
975		1333
976	/* queue check watchers, to be executed first */	1334	/* queue check watchers, to be executed first */
977	if (checkcnt)	1335	if (expect_false (checkcnt))
978	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1336	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
979		1337
980	call_pending (EV_A);	1338	call_pending (EV_A);
981	}
982	while (activecnt && !loop_done);
983		1339
984	if (loop_done != 2)	1340	if (expect_false (loop_done))
985	loop_done = 0;	1341	break;
		1342	}
		1343
		1344	if (loop_done == EVUNLOOP_ONE)
		1345	loop_done = EVUNLOOP_CANCEL;
986	}	1346	}
987		1347
988	void	1348	void
989	ev_unloop (EV_P_ int how)	1349	ev_unloop (EV_P_ int how)
990	{	1350	{
…		…
1043	}	1403	}
1044		1404
1045	/*****************************************************************************/	1405	/*****************************************************************************/
1046		1406
1047	void	1407	void
1048	ev_io_start (EV_P_ struct ev_io *w)	1408	ev_io_start (EV_P_ ev_io *w)
1049	{	1409	{
1050	int fd = w->fd;	1410	int fd = w->fd;
1051		1411
1052	if (ev_is_active (w))	1412	if (expect_false (ev_is_active (w)))
1053	return;	1413	return;
1054		1414
1055	assert (("ev_io_start called with negative fd", fd >= 0));	1415	assert (("ev_io_start called with negative fd", fd >= 0));
1056		1416
1057	ev_start (EV_A_ (W)w, 1);	1417	ev_start (EV_A_ (W)w, 1);
1058	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1418	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1059	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1419	wlist_add ((WL *)&anfds[fd].head, (WL)w);
1060		1420
1061	fd_change (EV_A_ fd);	1421	fd_change (EV_A_ fd);
1062	}	1422	}
1063		1423
1064	void	1424	void
1065	ev_io_stop (EV_P_ struct ev_io *w)	1425	ev_io_stop (EV_P_ ev_io *w)
1066	{	1426	{
1067	ev_clear_pending (EV_A_ (W)w);	1427	ev_clear_pending (EV_A_ (W)w);
1068	if (!ev_is_active (w))	1428	if (expect_false (!ev_is_active (w)))
1069	return;	1429	return;
		1430
		1431	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1070		1432
1071	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1433	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
1072	ev_stop (EV_A_ (W)w);	1434	ev_stop (EV_A_ (W)w);
1073		1435
1074	fd_change (EV_A_ w->fd);	1436	fd_change (EV_A_ w->fd);
1075	}	1437	}
1076		1438
1077	void	1439	void
1078	ev_timer_start (EV_P_ struct ev_timer *w)	1440	ev_timer_start (EV_P_ ev_timer *w)
1079	{	1441	{
1080	if (ev_is_active (w))	1442	if (expect_false (ev_is_active (w)))
1081	return;	1443	return;
1082		1444
1083	w->at += mn_now;	1445	((WT)w)->at += mn_now;
1084		1446
1085	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.));
1086		1448
1087	ev_start (EV_A_ (W)w, ++timercnt);	1449	ev_start (EV_A_ (W)w, ++timercnt);
1088	array_needsize (timers, timermax, timercnt, );	1450	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
1089	timers [timercnt - 1] = w;	1451	timers [timercnt - 1] = w;
1090	upheap ((WT *)timers, timercnt - 1);	1452	upheap ((WT *)timers, timercnt - 1);
1091	}
1092		1453
		1454	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1455	}
		1456
1093	void	1457	void
1094	ev_timer_stop (EV_P_ struct ev_timer *w)	1458	ev_timer_stop (EV_P_ ev_timer *w)
1095	{	1459	{
1096	ev_clear_pending (EV_A_ (W)w);	1460	ev_clear_pending (EV_A_ (W)w);
1097	if (!ev_is_active (w))	1461	if (expect_false (!ev_is_active (w)))
1098	return;	1462	return;
1099		1463
		1464	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1465
1100	if (w->active < timercnt--)	1466	if (expect_true (((W)w)->active < timercnt--))
1101	{	1467	{
1102	timers [w->active - 1] = timers [timercnt];	1468	timers [((W)w)->active - 1] = timers [timercnt];
1103	downheap ((WT *)timers, timercnt, w->active - 1);	1469	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1104	}	1470	}
1105		1471
1106	w->at = w->repeat;	1472	((WT)w)->at -= mn_now;
1107		1473
1108	ev_stop (EV_A_ (W)w);	1474	ev_stop (EV_A_ (W)w);
1109	}	1475	}
1110		1476
1111	void	1477	void
1112	ev_timer_again (EV_P_ struct ev_timer *w)	1478	ev_timer_again (EV_P_ ev_timer *w)
1113	{	1479	{
1114	if (ev_is_active (w))	1480	if (ev_is_active (w))
1115	{	1481	{
1116	if (w->repeat)	1482	if (w->repeat)
1117	{	1483	{
1118	w->at = mn_now + w->repeat;	1484	((WT)w)->at = mn_now + w->repeat;
1119	downheap ((WT *)timers, timercnt, w->active - 1);	1485	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1120	}	1486	}
1121	else	1487	else
1122	ev_timer_stop (EV_A_ w);	1488	ev_timer_stop (EV_A_ w);
1123	}	1489	}
1124	else if (w->repeat)	1490	else if (w->repeat)
		1491	{
		1492	w->at = w->repeat;
1125	ev_timer_start (EV_A_ w);	1493	ev_timer_start (EV_A_ w);
		1494	}
1126	}	1495	}
1127		1496
		1497	#if EV_PERIODICS
1128	void	1498	void
1129	ev_periodic_start (EV_P_ struct ev_periodic *w)	1499	ev_periodic_start (EV_P_ ev_periodic *w)
1130	{	1500	{
1131	if (ev_is_active (w))	1501	if (expect_false (ev_is_active (w)))
1132	return;	1502	return;
1133		1503
		1504	if (w->reschedule_cb)
		1505	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1506	else if (w->interval)
		1507	{
1134	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.));
1135
1136	/* 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 */
1137	if (w->interval)
1138	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;	1510	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1511	}
1139		1512
1140	ev_start (EV_A_ (W)w, ++periodiccnt);	1513	ev_start (EV_A_ (W)w, ++periodiccnt);
1141	array_needsize (periodics, periodicmax, periodiccnt, );	1514	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
1142	periodics [periodiccnt - 1] = w;	1515	periodics [periodiccnt - 1] = w;
1143	upheap ((WT *)periodics, periodiccnt - 1);	1516	upheap ((WT *)periodics, periodiccnt - 1);
1144	}
1145		1517
		1518	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1519	}
		1520
1146	void	1521	void
1147	ev_periodic_stop (EV_P_ struct ev_periodic *w)	1522	ev_periodic_stop (EV_P_ ev_periodic *w)
1148	{	1523	{
1149	ev_clear_pending (EV_A_ (W)w);	1524	ev_clear_pending (EV_A_ (W)w);
1150	if (!ev_is_active (w))	1525	if (expect_false (!ev_is_active (w)))
1151	return;	1526	return;
1152		1527
		1528	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1529
1153	if (w->active < periodiccnt--)	1530	if (expect_true (((W)w)->active < periodiccnt--))
1154	{	1531	{
1155	periodics [w->active - 1] = periodics [periodiccnt];	1532	periodics [((W)w)->active - 1] = periodics [periodiccnt];
1156	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1533	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
1157	}	1534	}
1158		1535
1159	ev_stop (EV_A_ (W)w);	1536	ev_stop (EV_A_ (W)w);
1160	}	1537	}
1161		1538
1162	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
1163	ev_idle_start (EV_P_ struct ev_idle *w)	1549	ev_idle_start (EV_P_ ev_idle *w)
1164	{	1550	{
1165	if (ev_is_active (w))	1551	if (expect_false (ev_is_active (w)))
1166	return;	1552	return;
1167		1553
1168	ev_start (EV_A_ (W)w, ++idlecnt);	1554	ev_start (EV_A_ (W)w, ++idlecnt);
1169	array_needsize (idles, idlemax, idlecnt, );	1555	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1170	idles [idlecnt - 1] = w;	1556	idles [idlecnt - 1] = w;
1171	}	1557	}
1172		1558
1173	void	1559	void
1174	ev_idle_stop (EV_P_ struct ev_idle *w)	1560	ev_idle_stop (EV_P_ ev_idle *w)
1175	{	1561	{
1176	ev_clear_pending (EV_A_ (W)w);	1562	ev_clear_pending (EV_A_ (W)w);
1177	if (ev_is_active (w))	1563	if (expect_false (!ev_is_active (w)))
1178	return;	1564	return;
1179		1565
		1566	{
		1567	int active = ((W)w)->active;
1180	idles [w->active - 1] = idles [--idlecnt];	1568	idles [active - 1] = idles [--idlecnt];
		1569	((W)idles [active - 1])->active = active;
		1570	}
		1571
1181	ev_stop (EV_A_ (W)w);	1572	ev_stop (EV_A_ (W)w);
1182	}	1573	}
1183		1574
1184	void	1575	void
1185	ev_prepare_start (EV_P_ struct ev_prepare *w)	1576	ev_prepare_start (EV_P_ ev_prepare *w)
1186	{	1577	{
1187	if (ev_is_active (w))	1578	if (expect_false (ev_is_active (w)))
1188	return;	1579	return;
1189		1580
1190	ev_start (EV_A_ (W)w, ++preparecnt);	1581	ev_start (EV_A_ (W)w, ++preparecnt);
1191	array_needsize (prepares, preparemax, preparecnt, );	1582	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1192	prepares [preparecnt - 1] = w;	1583	prepares [preparecnt - 1] = w;
1193	}	1584	}
1194		1585
1195	void	1586	void
1196	ev_prepare_stop (EV_P_ struct ev_prepare *w)	1587	ev_prepare_stop (EV_P_ ev_prepare *w)
1197	{	1588	{
1198	ev_clear_pending (EV_A_ (W)w);	1589	ev_clear_pending (EV_A_ (W)w);
1199	if (ev_is_active (w))	1590	if (expect_false (!ev_is_active (w)))
1200	return;	1591	return;
1201		1592
		1593	{
		1594	int active = ((W)w)->active;
1202	prepares [w->active - 1] = prepares [--preparecnt];	1595	prepares [active - 1] = prepares [--preparecnt];
		1596	((W)prepares [active - 1])->active = active;
		1597	}
		1598
1203	ev_stop (EV_A_ (W)w);	1599	ev_stop (EV_A_ (W)w);
1204	}	1600	}
1205		1601
1206	void	1602	void
1207	ev_check_start (EV_P_ struct ev_check *w)	1603	ev_check_start (EV_P_ ev_check *w)
1208	{	1604	{
1209	if (ev_is_active (w))	1605	if (expect_false (ev_is_active (w)))
1210	return;	1606	return;
1211		1607
1212	ev_start (EV_A_ (W)w, ++checkcnt);	1608	ev_start (EV_A_ (W)w, ++checkcnt);
1213	array_needsize (checks, checkmax, checkcnt, );	1609	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1214	checks [checkcnt - 1] = w;	1610	checks [checkcnt - 1] = w;
1215	}	1611	}
1216		1612
1217	void	1613	void
1218	ev_check_stop (EV_P_ struct ev_check *w)	1614	ev_check_stop (EV_P_ ev_check *w)
1219	{	1615	{
1220	ev_clear_pending (EV_A_ (W)w);	1616	ev_clear_pending (EV_A_ (W)w);
1221	if (ev_is_active (w))	1617	if (expect_false (!ev_is_active (w)))
1222	return;	1618	return;
1223		1619
		1620	{
		1621	int active = ((W)w)->active;
1224	checks [w->active - 1] = checks [--checkcnt];	1622	checks [active - 1] = checks [--checkcnt];
		1623	((W)checks [active - 1])->active = active;
		1624	}
		1625
1225	ev_stop (EV_A_ (W)w);	1626	ev_stop (EV_A_ (W)w);
1226	}	1627	}
1227		1628
1228	#ifndef SA_RESTART	1629	#ifndef SA_RESTART
1229	# define SA_RESTART 0	1630	# define SA_RESTART 0
1230	#endif	1631	#endif
1231		1632
1232	void	1633	void
1233	ev_signal_start (EV_P_ struct ev_signal *w)	1634	ev_signal_start (EV_P_ ev_signal *w)
1234	{	1635	{
1235	#if EV_MULTIPLICITY	1636	#if EV_MULTIPLICITY
1236	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));
1237	#endif	1638	#endif
1238	if (ev_is_active (w))	1639	if (expect_false (ev_is_active (w)))
1239	return;	1640	return;
1240		1641
1241	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));
1242		1643
1243	ev_start (EV_A_ (W)w, 1);	1644	ev_start (EV_A_ (W)w, 1);
1244	array_needsize (signals, signalmax, w->signum, signals_init);	1645	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1245	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1646	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1246		1647
1247	if (!w->next)	1648	if (!((WL)w)->next)
1248	{	1649	{
		1650	#if _WIN32
		1651	signal (w->signum, sighandler);
		1652	#else
1249	struct sigaction sa;	1653	struct sigaction sa;
1250	sa.sa_handler = sighandler;	1654	sa.sa_handler = sighandler;
1251	sigfillset (&sa.sa_mask);	1655	sigfillset (&sa.sa_mask);
1252	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 */
1253	sigaction (w->signum, &sa, 0);	1657	sigaction (w->signum, &sa, 0);
		1658	#endif
1254	}	1659	}
1255	}	1660	}
1256		1661
1257	void	1662	void
1258	ev_signal_stop (EV_P_ struct ev_signal *w)	1663	ev_signal_stop (EV_P_ ev_signal *w)
1259	{	1664	{
1260	ev_clear_pending (EV_A_ (W)w);	1665	ev_clear_pending (EV_A_ (W)w);
1261	if (!ev_is_active (w))	1666	if (expect_false (!ev_is_active (w)))
1262	return;	1667	return;
1263		1668
1264	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1669	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1265	ev_stop (EV_A_ (W)w);	1670	ev_stop (EV_A_ (W)w);
1266		1671
1267	if (!signals [w->signum - 1].head)	1672	if (!signals [w->signum - 1].head)
1268	signal (w->signum, SIG_DFL);	1673	signal (w->signum, SIG_DFL);
1269	}	1674	}
1270		1675
1271	void	1676	void
1272	ev_child_start (EV_P_ struct ev_child *w)	1677	ev_child_start (EV_P_ ev_child *w)
1273	{	1678	{
1274	#if EV_MULTIPLICITY	1679	#if EV_MULTIPLICITY
1275	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));
1276	#endif	1681	#endif
1277	if (ev_is_active (w))	1682	if (expect_false (ev_is_active (w)))
1278	return;	1683	return;
1279		1684
1280	ev_start (EV_A_ (W)w, 1);	1685	ev_start (EV_A_ (W)w, 1);
1281	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1686	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1282	}	1687	}
1283		1688
1284	void	1689	void
1285	ev_child_stop (EV_P_ struct ev_child *w)	1690	ev_child_stop (EV_P_ ev_child *w)
1286	{	1691	{
1287	ev_clear_pending (EV_A_ (W)w);	1692	ev_clear_pending (EV_A_ (W)w);
1288	if (ev_is_active (w))	1693	if (expect_false (!ev_is_active (w)))
1289	return;	1694	return;
1290		1695
1291	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1696	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1292	ev_stop (EV_A_ (W)w);	1697	ev_stop (EV_A_ (W)w);
1293	}	1698	}
1294		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
1295	/*****************************************************************************/	1747	/*****************************************************************************/
1296		1748
1297	struct ev_once	1749	struct ev_once
1298	{	1750	{
1299	struct ev_io io;	1751	ev_io io;
1300	struct ev_timer to;	1752	ev_timer to;
1301	void (*cb)(int revents, void *arg);	1753	void (*cb)(int revents, void *arg);
1302	void *arg;	1754	void *arg;
1303	};	1755	};
1304		1756
1305	static void	1757	static void
…		…
1308	void (*cb)(int revents, void *arg) = once->cb;	1760	void (*cb)(int revents, void *arg) = once->cb;
1309	void *arg = once->arg;	1761	void *arg = once->arg;
1310		1762
1311	ev_io_stop (EV_A_ &once->io);	1763	ev_io_stop (EV_A_ &once->io);
1312	ev_timer_stop (EV_A_ &once->to);	1764	ev_timer_stop (EV_A_ &once->to);
1313	free (once);	1765	ev_free (once);
1314		1766
1315	cb (revents, arg);	1767	cb (revents, arg);
1316	}	1768	}
1317		1769
1318	static void	1770	static void
1319	once_cb_io (EV_P_ struct ev_io *w, int revents)	1771	once_cb_io (EV_P_ ev_io *w, int revents)
1320	{	1772	{
1321	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);
1322	}	1774	}
1323		1775
1324	static void	1776	static void
1325	once_cb_to (EV_P_ struct ev_timer *w, int revents)	1777	once_cb_to (EV_P_ ev_timer *w, int revents)
1326	{	1778	{
1327	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);
1328	}	1780	}
1329		1781
1330	void	1782	void
1331	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)
1332	{	1784	{
1333	struct ev_once *once = malloc (sizeof (struct ev_once));	1785	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1334		1786
1335	if (!once)	1787	if (expect_false (!once))
		1788	{
1336	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1789	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1337	else	1790	return;
1338	{	1791	}
		1792
1339	once->cb = cb;	1793	once->cb = cb;
1340	once->arg = arg;	1794	once->arg = arg;
1341		1795
1342	ev_watcher_init (&once->io, once_cb_io);	1796	ev_init (&once->io, once_cb_io);
1343	if (fd >= 0)	1797	if (fd >= 0)
1344	{	1798	{
1345	ev_io_set (&once->io, fd, events);	1799	ev_io_set (&once->io, fd, events);
1346	ev_io_start (EV_A_ &once->io);	1800	ev_io_start (EV_A_ &once->io);
1347	}	1801	}
1348		1802
1349	ev_watcher_init (&once->to, once_cb_to);	1803	ev_init (&once->to, once_cb_to);
1350	if (timeout >= 0.)	1804	if (timeout >= 0.)
1351	{	1805	{
1352	ev_timer_set (&once->to, timeout, 0.);	1806	ev_timer_set (&once->to, timeout, 0.);
1353	ev_timer_start (EV_A_ &once->to);	1807	ev_timer_start (EV_A_ &once->to);
1354	}
1355	}	1808	}
1356	}	1809	}
1357		1810
		1811	#ifdef __cplusplus
		1812	}
		1813	#endif
		1814

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