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Comparing libev/ev.c (file contents):
Revision 1.50 by root, Sat Nov 3 19:41:55 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
		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_USE_POLL	141	#ifndef EV_USE_POLL
64	# 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
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
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
98	#include "ev.h"	187	# include "ev.h"
		188	#endif
99		189
100	#if __GNUC__ >= 3	190	#if __GNUC__ >= 3
101	# define expect(expr,value) __builtin_expect ((expr),(value))	191	# define expect(expr,value) __builtin_expect ((expr),(value))
102	# define inline inline	192	# define inline static inline
103	#else	193	#else
104	# define expect(expr,value) (expr)	194	# define expect(expr,value) (expr)
105	# define inline static	195	# define inline static
106	#endif	196	#endif
107		197
…		…
109	#define expect_true(expr) expect ((expr) != 0, 1)	199	#define expect_true(expr) expect ((expr) != 0, 1)
110		200
111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	201	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	202	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
113		203
		204	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		205	#define EMPTY2(a,b) /* used to suppress some warnings */
		206
114	typedef struct ev_watcher *W;	207	typedef ev_watcher *W;
115	typedef struct ev_watcher_list *WL;	208	typedef ev_watcher_list *WL;
116	typedef struct ev_watcher_time *WT;	209	typedef ev_watcher_time *WT;
117		210
118	static ev_tstamp now_floor, now, diff; /* monotonic clock */	211	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		212
		213	#ifdef _WIN32
		214	# include "ev_win32.c"
		215	#endif
		216
		217	/*****************************************************************************/
		218
		219	static void (*syserr_cb)(const char *msg);
		220
		221	void ev_set_syserr_cb (void (*cb)(const char *msg))
		222	{
		223	syserr_cb = cb;
		224	}
		225
		226	static void
		227	syserr (const char *msg)
		228	{
		229	if (!msg)
		230	msg = "(libev) system error";
		231
		232	if (syserr_cb)
		233	syserr_cb (msg);
		234	else
		235	{
		236	perror (msg);
		237	abort ();
		238	}
		239	}
		240
		241	static void *(*alloc)(void *ptr, long size);
		242
		243	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		244	{
		245	alloc = cb;
		246	}
		247
		248	static void *
		249	ev_realloc (void *ptr, long size)
		250	{
		251	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		252
		253	if (!ptr && size)
		254	{
		255	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		256	abort ();
		257	}
		258
		259	return ptr;
		260	}
		261
		262	#define ev_malloc(size) ev_realloc (0, (size))
		263	#define ev_free(ptr) ev_realloc ((ptr), 0)
		264
		265	/*****************************************************************************/
		266
		267	typedef struct
		268	{
		269	WL head;
		270	unsigned char events;
		271	unsigned char reify;
		272	#if EV_SELECT_IS_WINSOCKET
		273	SOCKET handle;
		274	#endif
		275	} ANFD;
		276
		277	typedef struct
		278	{
		279	W w;
		280	int events;
		281	} ANPENDING;
		282
		283	#if EV_MULTIPLICITY
		284
		285	struct ev_loop
		286	{
		287	ev_tstamp ev_rt_now;
		288	#define ev_rt_now ((loop)->ev_rt_now)
		289	#define VAR(name,decl) decl;
		290	#include "ev_vars.h"
		291	#undef VAR
		292	};
		293	#include "ev_wrap.h"
		294
		295	static struct ev_loop default_loop_struct;
		296	struct ev_loop *ev_default_loop_ptr;
		297
		298	#else
		299
119	ev_tstamp ev_now;	300	ev_tstamp ev_rt_now;
120	int ev_method;	301	#define VAR(name,decl) static decl;
		302	#include "ev_vars.h"
		303	#undef VAR
121		304
122	static int have_monotonic; /* runtime */	305	static int ev_default_loop_ptr;
123		306
124	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	307	#endif
125	static void (*method_modify)(int fd, int oev, int nev);
126	static void (*method_poll)(ev_tstamp timeout);
127		308
128	/*****************************************************************************/	309	/*****************************************************************************/
129		310
130	ev_tstamp	311	ev_tstamp
131	ev_time (void)	312	ev_time (void)
…		…
139	gettimeofday (&tv, 0);	320	gettimeofday (&tv, 0);
140	return tv.tv_sec + tv.tv_usec * 1e-6;	321	return tv.tv_sec + tv.tv_usec * 1e-6;
141	#endif	322	#endif
142	}	323	}
143		324
144	static ev_tstamp	325	inline ev_tstamp
145	get_clock (void)	326	get_clock (void)
146	{	327	{
147	#if EV_USE_MONOTONIC	328	#if EV_USE_MONOTONIC
148	if (expect_true (have_monotonic))	329	if (expect_true (have_monotonic))
149	{	330	{
…		…
154	#endif	335	#endif
155		336
156	return ev_time ();	337	return ev_time ();
157	}	338	}
158		339
		340	#if EV_MULTIPLICITY
		341	ev_tstamp
		342	ev_now (EV_P)
		343	{
		344	return ev_rt_now;
		345	}
		346	#endif
		347
159	#define array_roundsize(base,n) ((n) | 4 & ~3)	348	#define array_roundsize(type,n) (((n) | 4) & ~3)
160		349
161	#define array_needsize(base,cur,cnt,init) \	350	#define array_needsize(type,base,cur,cnt,init) \
162	if (expect_false ((cnt) > cur)) \	351	if (expect_false ((cnt) > cur)) \
163	{ \	352	{ \
164	int newcnt = cur; \	353	int newcnt = cur; \
165	do \	354	do \
166	{ \	355	{ \
167	newcnt = array_roundsize (base, newcnt << 1); \	356	newcnt = array_roundsize (type, newcnt << 1); \
168	} \	357	} \
169	while ((cnt) > newcnt); \	358	while ((cnt) > newcnt); \
170	\	359	\
171	base = realloc (base, sizeof (*base) * (newcnt)); \	360	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
172	init (base + cur, newcnt - cur); \	361	init (base + cur, newcnt - cur); \
173	cur = newcnt; \	362	cur = newcnt; \
174	}	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;
175		375
176	/*****************************************************************************/	376	/*****************************************************************************/
177
178	typedef struct
179	{
180	struct ev_watcher_list *head;
181	unsigned char events;
182	unsigned char reify;
183	} ANFD;
184
185	static ANFD *anfds;
186	static int anfdmax;
187		377
188	static void	378	static void
189	anfds_init (ANFD *base, int count)	379	anfds_init (ANFD *base, int count)
190	{	380	{
191	while (count--)	381	while (count--)
…		…
196		386
197	++base;	387	++base;
198	}	388	}
199	}	389	}
200		390
201	typedef struct	391	void
		392	ev_feed_event (EV_P_ void *w, int revents)
202	{	393	{
203	W w;	394	W w_ = (W)w;
204	int events;
205	} ANPENDING;
206		395
207	static ANPENDING *pendings [NUMPRI];	396	if (expect_false (w_->pending))
208	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
209
210	static void
211	event (W w, int events)
212	{
213	if (w->pending)
214	{	397	{
215	pendings [ABSPRI (w)][w->pending - 1].events |= events;	398	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
216	return;	399	return;
217	}	400	}
218		401
219	w->pending = ++pendingcnt [ABSPRI (w)];	402	w_->pending = ++pendingcnt [ABSPRI (w_)];
220	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);
221	pendings [ABSPRI (w)][w->pending - 1].w = w;	404	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
222	pendings [ABSPRI (w)][w->pending - 1].events = events;	405	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
223	}	406	}
224		407
225	static void	408	static void
226	queue_events (W *events, int eventcnt, int type)	409	queue_events (EV_P_ W *events, int eventcnt, int type)
227	{	410	{
228	int i;	411	int i;
229		412
230	for (i = 0; i < eventcnt; ++i)	413	for (i = 0; i < eventcnt; ++i)
231	event (events [i], type);	414	ev_feed_event (EV_A_ events [i], type);
232	}	415	}
233		416
234	static void	417	inline void
235	fd_event (int fd, int events)	418	fd_event (EV_P_ int fd, int revents)
236	{	419	{
237	ANFD *anfd = anfds + fd;	420	ANFD *anfd = anfds + fd;
238	struct ev_io *w;	421	ev_io *w;
239		422
240	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)
241	{	424	{
242	int ev = w->events & events;	425	int ev = w->events & revents;
243		426
244	if (ev)	427	if (ev)
245	event ((W)w, ev);	428	ev_feed_event (EV_A_ (W)w, ev);
246	}	429	}
		430	}
		431
		432	void
		433	ev_feed_fd_event (EV_P_ int fd, int revents)
		434	{
		435	fd_event (EV_A_ fd, revents);
247	}	436	}
248		437
249	/*****************************************************************************/	438	/*****************************************************************************/
250		439
251	static int *fdchanges;	440	inline void
252	static int fdchangemax, fdchangecnt;	441	fd_reify (EV_P)
253
254	static void
255	fd_reify (void)
256	{	442	{
257	int i;	443	int i;
258		444
259	for (i = 0; i < fdchangecnt; ++i)	445	for (i = 0; i < fdchangecnt; ++i)
260	{	446	{
261	int fd = fdchanges [i];	447	int fd = fdchanges [i];
262	ANFD *anfd = anfds + fd;	448	ANFD *anfd = anfds + fd;
263	struct ev_io *w;	449	ev_io *w;
264		450
265	int events = 0;	451	int events = 0;
266		452
267	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)
268	events |= w->events;	454	events |= w->events;
269		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
270	anfd->reify = 0;	465	anfd->reify = 0;
271		466
272	if (anfd->events != events)
273	{
274	method_modify (fd, anfd->events, events);	467	backend_modify (EV_A_ fd, anfd->events, events);
275	anfd->events = events;	468	anfd->events = events;
276	}
277	}	469	}
278		470
279	fdchangecnt = 0;	471	fdchangecnt = 0;
280	}	472	}
281		473
282	static void	474	static void
283	fd_change (int fd)	475	fd_change (EV_P_ int fd)
284	{	476	{
285	if (anfds [fd].reify || fdchangecnt < 0)	477	if (expect_false (anfds [fd].reify))
286	return;	478	return;
287		479
288	anfds [fd].reify = 1;	480	anfds [fd].reify = 1;
289		481
290	++fdchangecnt;	482	++fdchangecnt;
291	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	483	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
292	fdchanges [fdchangecnt - 1] = fd;	484	fdchanges [fdchangecnt - 1] = fd;
293	}	485	}
294		486
295	static void	487	static void
296	fd_kill (int fd)	488	fd_kill (EV_P_ int fd)
297	{	489	{
298	struct ev_io *w;	490	ev_io *w;
299		491
300	while ((w = (struct ev_io *)anfds [fd].head))	492	while ((w = (ev_io *)anfds [fd].head))
301	{	493	{
302	ev_io_stop (w);	494	ev_io_stop (EV_A_ w);
303	event ((W)w, EV_ERROR | EV_READ | EV_WRITE);	495	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
304	}	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
305	}	507	}
306		508
307	/* called on EBADF to verify fds */	509	/* called on EBADF to verify fds */
308	static void	510	static void
309	fd_ebadf (void)	511	fd_ebadf (EV_P)
310	{	512	{
311	int fd;	513	int fd;
312		514
313	for (fd = 0; fd < anfdmax; ++fd)	515	for (fd = 0; fd < anfdmax; ++fd)
314	if (anfds [fd].events)	516	if (anfds [fd].events)
315	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	517	if (!fd_valid (fd) == -1 && errno == EBADF)
316	fd_kill (fd);	518	fd_kill (EV_A_ fd);
317	}	519	}
318		520
319	/* 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 */
320	static void	522	static void
321	fd_enomem (void)	523	fd_enomem (EV_P)
322	{	524	{
323	int fd = anfdmax;	525	int fd;
324		526
325	while (fd--)	527	for (fd = anfdmax; fd--; )
326	if (anfds [fd].events)	528	if (anfds [fd].events)
327	{	529	{
328	close (fd);
329	fd_kill (fd);	530	fd_kill (EV_A_ fd);
330	return;	531	return;
331	}	532	}
332	}	533	}
333		534
		535	/* usually called after fork if backend needs to re-arm all fds from scratch */
		536	static void
		537	fd_rearm_all (EV_P)
		538	{
		539	int fd;
		540
		541	/* this should be highly optimised to not do anything but set a flag */
		542	for (fd = 0; fd < anfdmax; ++fd)
		543	if (anfds [fd].events)
		544	{
		545	anfds [fd].events = 0;
		546	fd_change (EV_A_ fd);
		547	}
		548	}
		549
334	/*****************************************************************************/	550	/*****************************************************************************/
335		551
336	static struct ev_timer **timers;
337	static int timermax, timercnt;
338
339	static struct ev_periodic **periodics;
340	static int periodicmax, periodiccnt;
341
342	static void	552	static void
343	upheap (WT *timers, int k)	553	upheap (WT *heap, int k)
344	{	554	{
345	WT w = timers [k];	555	WT w = heap [k];
346		556
347	while (k && timers [k >> 1]->at > w->at)	557	while (k && heap [k >> 1]->at > w->at)
348	{	558	{
349	timers [k] = timers [k >> 1];	559	heap [k] = heap [k >> 1];
350	timers [k]->active = k + 1;	560	((W)heap [k])->active = k + 1;
351	k >>= 1;	561	k >>= 1;
352	}	562	}
353		563
354	timers [k] = w;	564	heap [k] = w;
355	timers [k]->active = k + 1;	565	((W)heap [k])->active = k + 1;
356		566
357	}	567	}
358		568
359	static void	569	static void
360	downheap (WT *timers, int N, int k)	570	downheap (WT *heap, int N, int k)
361	{	571	{
362	WT w = timers [k];	572	WT w = heap [k];
363		573
364	while (k < (N >> 1))	574	while (k < (N >> 1))
365	{	575	{
366	int j = k << 1;	576	int j = k << 1;
367		577
368	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	578	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
369	++j;	579	++j;
370		580
371	if (w->at <= timers [j]->at)	581	if (w->at <= heap [j]->at)
372	break;	582	break;
373		583
374	timers [k] = timers [j];	584	heap [k] = heap [j];
375	timers [k]->active = k + 1;	585	((W)heap [k])->active = k + 1;
376	k = j;	586	k = j;
377	}	587	}
378		588
379	timers [k] = w;	589	heap [k] = w;
380	timers [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);
381	}	598	}
382		599
383	/*****************************************************************************/	600	/*****************************************************************************/
384		601
385	typedef struct	602	typedef struct
386	{	603	{
387	struct ev_watcher_list *head;	604	WL head;
388	sig_atomic_t volatile gotsig;	605	sig_atomic_t volatile gotsig;
389	} ANSIG;	606	} ANSIG;
390		607
391	static ANSIG *signals;	608	static ANSIG *signals;
392	static int signalmax;	609	static int signalmax;
393		610
394	static int sigpipe [2];	611	static int sigpipe [2];
395	static sig_atomic_t volatile gotsig;	612	static sig_atomic_t volatile gotsig;
396	static struct ev_io sigev;	613	static ev_io sigev;
397		614
398	static void	615	static void
399	signals_init (ANSIG *base, int count)	616	signals_init (ANSIG *base, int count)
400	{	617	{
401	while (count--)	618	while (count--)
…		…
408	}	625	}
409		626
410	static void	627	static void
411	sighandler (int signum)	628	sighandler (int signum)
412	{	629	{
		630	#if _WIN32
		631	signal (signum, sighandler);
		632	#endif
		633
413	signals [signum - 1].gotsig = 1;	634	signals [signum - 1].gotsig = 1;
414		635
415	if (!gotsig)	636	if (!gotsig)
416	{	637	{
417	int old_errno = errno;	638	int old_errno = errno;
…		…
419	write (sigpipe [1], &signum, 1);	640	write (sigpipe [1], &signum, 1);
420	errno = old_errno;	641	errno = old_errno;
421	}	642	}
422	}	643	}
423		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
424	static void	665	static void
425	sigcb (struct ev_io *iow, int revents)	666	sigcb (EV_P_ ev_io *iow, int revents)
426	{	667	{
427	struct ev_watcher_list *w;
428	int signum;	668	int signum;
429		669
430	read (sigpipe [0], &revents, 1);	670	read (sigpipe [0], &revents, 1);
431	gotsig = 0;	671	gotsig = 0;
432		672
433	for (signum = signalmax; signum--; )	673	for (signum = signalmax; signum--; )
434	if (signals [signum].gotsig)	674	if (signals [signum].gotsig)
435	{	675	ev_feed_signal_event (EV_A_ signum + 1);
436	signals [signum].gotsig = 0;
437
438	for (w = signals [signum].head; w; w = w->next)
439	event ((W)w, EV_SIGNAL);
440	}
441	}	676	}
442		677
443	static void	678	static void
444	siginit (void)	679	fd_intern (int fd)
445	{	680	{
446	#ifndef WIN32	681	#ifdef _WIN32
		682	int arg = 1;
		683	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		684	#else
447	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	685	fcntl (fd, F_SETFD, FD_CLOEXEC);
448	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
449
450	/* rather than sort out wether we really need nb, set it */
451	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	686	fcntl (fd, F_SETFL, O_NONBLOCK);
452	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
453	#endif	687	#endif
		688	}
		689
		690	static void
		691	siginit (EV_P)
		692	{
		693	fd_intern (sigpipe [0]);
		694	fd_intern (sigpipe [1]);
454		695
455	ev_io_set (&sigev, sigpipe [0], EV_READ);	696	ev_io_set (&sigev, sigpipe [0], EV_READ);
456	ev_io_start (&sigev);	697	ev_io_start (EV_A_ &sigev);
		698	ev_unref (EV_A); /* child watcher should not keep loop alive */
457	}	699	}
458		700
459	/*****************************************************************************/	701	/*****************************************************************************/
460		702
461	static struct ev_idle **idles;
462	static int idlemax, idlecnt;
463
464	static struct ev_prepare **prepares;
465	static int preparemax, preparecnt;
466
467	static struct ev_check **checks;
468	static int checkmax, checkcnt;
469
470	/*****************************************************************************/
471
472	static struct ev_child *childs [PID_HASHSIZE];	703	static ev_child *childs [PID_HASHSIZE];
473	static struct ev_signal childev;
474		704
475	#ifndef WIN32	705	#ifndef _WIN32
		706
		707	static ev_signal childev;
476		708
477	#ifndef WCONTINUED	709	#ifndef WCONTINUED
478	# define WCONTINUED 0	710	# define WCONTINUED 0
479	#endif	711	#endif
480		712
481	static void	713	static void
482	child_reap (struct ev_signal *sw, int chain, int pid, int status)	714	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
483	{	715	{
484	struct ev_child *w;	716	ev_child *w;
485		717
486	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)
487	if (w->pid == pid || !w->pid)	719	if (w->pid == pid || !w->pid)
488	{	720	{
489	w->priority = sw->priority; /* need to do it *now* */	721	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
490	w->rpid = pid;	722	w->rpid = pid;
491	w->rstatus = status;	723	w->rstatus = status;
492	event ((W)w, EV_CHILD);	724	ev_feed_event (EV_A_ (W)w, EV_CHILD);
493	}	725	}
494	}	726	}
495		727
496	static void	728	static void
497	childcb (struct ev_signal *sw, int revents)	729	childcb (EV_P_ ev_signal *sw, int revents)
498	{	730	{
499	int pid, status;	731	int pid, status;
500		732
501	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	733	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
502	{	734	{
503	/* 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 */
504	event ((W)sw, EV_SIGNAL);	737	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
505		738
506	child_reap (sw, pid, pid, status);	739	child_reap (EV_A_ sw, pid, pid, status);
507	child_reap (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 */
508	}	741	}
509	}	742	}
510		743
511	#endif	744	#endif
512		745
513	/*****************************************************************************/	746	/*****************************************************************************/
514		747
		748	#if EV_USE_PORT
		749	# include "ev_port.c"
		750	#endif
515	#if EV_USE_KQUEUE	751	#if EV_USE_KQUEUE
516	# include "ev_kqueue.c"	752	# include "ev_kqueue.c"
517	#endif	753	#endif
518	#if EV_USE_EPOLL	754	#if EV_USE_EPOLL
519	# include "ev_epoll.c"	755	# include "ev_epoll.c"
…		…
537	return EV_VERSION_MINOR;	773	return EV_VERSION_MINOR;
538	}	774	}
539		775
540	/* 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 */
541	static int	777	static int
542	enable_secure ()	778	enable_secure (void)
543	{	779	{
544	#ifdef WIN32	780	#ifdef _WIN32
545	return 0;	781	return 0;
546	#else	782	#else
547	return getuid () != geteuid ()	783	return getuid () != geteuid ()
548	|| getgid () != getegid ();	784	|| getgid () != getegid ();
549	#endif	785	#endif
550	}	786	}
551		787
552	int ev_init (int methods)	788	unsigned int
		789	ev_supported_backends (void)
553	{	790	{
554	if (!ev_method)	791	unsigned int flags = 0;
		792
		793	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		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)
		804	{
		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)
555	{	838	{
556	#if EV_USE_MONOTONIC	839	#if EV_USE_MONOTONIC
557	{	840	{
558	struct timespec ts;	841	struct timespec ts;
559	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	842	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
560	have_monotonic = 1;	843	have_monotonic = 1;
561	}	844	}
562	#endif	845	#endif
563		846
564	ev_now = ev_time ();	847	ev_rt_now = ev_time ();
565	now = get_clock ();	848	mn_now = get_clock ();
566	now_floor = now;	849	now_floor = mn_now;
567	diff = ev_now - now;	850	rtmn_diff = ev_rt_now - mn_now;
568		851
569	if (pipe (sigpipe))	852	if (!(flags & EVFLAG_NOENV)
570	return 0;	853	&& !enable_secure ()
571		854	&& getenv ("LIBEV_FLAGS"))
572	if (methods == EVMETHOD_AUTO)
573	if (!enable_secure () && getenv ("LIBEV_METHODS"))
574	methods = atoi (getenv ("LIBEV_METHODS"));	855	flags = atoi (getenv ("LIBEV_FLAGS"));
575	else
576	methods = EVMETHOD_ANY;
577		856
578	ev_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
579	#if EV_USE_KQUEUE	864	#if EV_USE_KQUEUE
580	if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);	865	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
581	#endif	866	#endif
582	#if EV_USE_EPOLL	867	#if EV_USE_EPOLL
583	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);	868	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
584	#endif	869	#endif
585	#if EV_USE_POLL	870	#if EV_USE_POLL
586	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);	871	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
587	#endif	872	#endif
588	#if EV_USE_SELECT	873	#if EV_USE_SELECT
589	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);	874	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
590	#endif	875	#endif
591		876
592	if (ev_method)	877	ev_init (&sigev, sigcb);
		878	ev_set_priority (&sigev, EV_MAXPRI);
		879	}
		880	}
		881
		882	static void
		883	loop_destroy (EV_P)
		884	{
		885	int i;
		886
		887	#if EV_USE_PORT
		888	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		889	#endif
		890	#if EV_USE_KQUEUE
		891	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		892	#endif
		893	#if EV_USE_EPOLL
		894	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		895	#endif
		896	#if EV_USE_POLL
		897	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		898	#endif
		899	#if EV_USE_SELECT
		900	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		901	#endif
		902
		903	for (i = NUMPRI; i--; )
		904	array_free (pending, [i]);
		905
		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
		920	loop_fork (EV_P)
		921	{
		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
		928	#if EV_USE_EPOLL
		929	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		930	#endif
		931
		932	if (ev_is_active (&sigev))
		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;
		948	}
		949
		950	#if EV_MULTIPLICITY
		951	struct ev_loop *
		952	ev_loop_new (unsigned int flags)
		953	{
		954	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		955
		956	memset (loop, 0, sizeof (struct ev_loop));
		957
		958	loop_init (EV_A_ flags);
		959
		960	if (ev_backend (EV_A))
		961	return loop;
		962
		963	return 0;
		964	}
		965
		966	void
		967	ev_loop_destroy (EV_P)
		968	{
		969	loop_destroy (EV_A);
		970	ev_free (loop);
		971	}
		972
		973	void
		974	ev_loop_fork (EV_P)
		975	{
		976	postfork = 1;
		977	}
		978
		979	#endif
		980
		981	#if EV_MULTIPLICITY
		982	struct ev_loop *
		983	ev_default_loop_init (unsigned int flags)
		984	#else
		985	int
		986	ev_default_loop (unsigned int flags)
		987	#endif
		988	{
		989	if (sigpipe [0] == sigpipe [1])
		990	if (pipe (sigpipe))
		991	return 0;
		992
		993	if (!ev_default_loop_ptr)
		994	{
		995	#if EV_MULTIPLICITY
		996	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		997	#else
		998	ev_default_loop_ptr = 1;
		999	#endif
		1000
		1001	loop_init (EV_A_ flags);
		1002
		1003	if (ev_backend (EV_A))
593	{	1004	{
594	ev_watcher_init (&sigev, sigcb);
595	ev_set_priority (&sigev, EV_MAXPRI);
596	siginit ();	1005	siginit (EV_A);
597		1006
598	#ifndef WIN32	1007	#ifndef _WIN32
599	ev_signal_init (&childev, childcb, SIGCHLD);	1008	ev_signal_init (&childev, childcb, SIGCHLD);
600	ev_set_priority (&childev, EV_MAXPRI);	1009	ev_set_priority (&childev, EV_MAXPRI);
601	ev_signal_start (&childev);	1010	ev_signal_start (EV_A_ &childev);
		1011	ev_unref (EV_A); /* child watcher should not keep loop alive */
602	#endif	1012	#endif
603	}	1013	}
		1014	else
		1015	ev_default_loop_ptr = 0;
604	}	1016	}
605		1017
606	return ev_method;	1018	return ev_default_loop_ptr;
		1019	}
		1020
		1021	void
		1022	ev_default_destroy (void)
		1023	{
		1024	#if EV_MULTIPLICITY
		1025	struct ev_loop *loop = ev_default_loop_ptr;
		1026	#endif
		1027
		1028	#ifndef _WIN32
		1029	ev_ref (EV_A); /* child watcher */
		1030	ev_signal_stop (EV_A_ &childev);
		1031	#endif
		1032
		1033	ev_ref (EV_A); /* signal watcher */
		1034	ev_io_stop (EV_A_ &sigev);
		1035
		1036	close (sigpipe [0]); sigpipe [0] = 0;
		1037	close (sigpipe [1]); sigpipe [1] = 0;
		1038
		1039	loop_destroy (EV_A);
		1040	}
		1041
		1042	void
		1043	ev_default_fork (void)
		1044	{
		1045	#if EV_MULTIPLICITY
		1046	struct ev_loop *loop = ev_default_loop_ptr;
		1047	#endif
		1048
		1049	if (backend)
		1050	postfork = 1;
607	}	1051	}
608		1052
609	/*****************************************************************************/	1053	/*****************************************************************************/
610		1054
611	void
612	ev_fork_prepare (void)
613	{
614	/* nop */
615	}
616
617	void
618	ev_fork_parent (void)
619	{
620	/* nop */
621	}
622
623	void
624	ev_fork_child (void)
625	{
626	#if EV_USE_EPOLL
627	if (ev_method == EVMETHOD_EPOLL)
628	epoll_postfork_child ();
629	#endif
630
631	ev_io_stop (&sigev);
632	close (sigpipe [0]);
633	close (sigpipe [1]);
634	pipe (sigpipe);
635	siginit ();
636	}
637
638	/*****************************************************************************/
639
640	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
641	call_pending (void)	1068	call_pending (EV_P)
642	{	1069	{
643	int pri;	1070	int pri;
644		1071
645	for (pri = NUMPRI; pri--; )	1072	for (pri = NUMPRI; pri--; )
646	while (pendingcnt [pri])	1073	while (pendingcnt [pri])
647	{	1074	{
648	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1075	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
649		1076
650	if (p->w)	1077	if (expect_true (p->w))
651	{	1078	{
		1079	assert (("non-pending watcher on pending list", p->w->pending));
		1080
652	p->w->pending = 0;	1081	p->w->pending = 0;
653	p->w->cb (p->w, p->events);	1082	EV_CB_INVOKE (p->w, p->events);
654	}	1083	}
655	}	1084	}
656	}	1085	}
657		1086
658	static void	1087	inline void
659	timers_reify (void)	1088	timers_reify (EV_P)
660	{	1089	{
661	while (timercnt && timers [0]->at <= now)	1090	while (timercnt && ((WT)timers [0])->at <= mn_now)
662	{	1091	{
663	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)));
664		1095
665	/* first reschedule or stop timer */	1096	/* first reschedule or stop timer */
666	if (w->repeat)	1097	if (w->repeat)
667	{	1098	{
668	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
669	w->at = now + w->repeat;	1101	((WT)w)->at += w->repeat;
		1102	if (((WT)w)->at < mn_now)
		1103	((WT)w)->at = mn_now;
		1104
670	downheap ((WT *)timers, timercnt, 0);	1105	downheap ((WT *)timers, timercnt, 0);
671	}	1106	}
672	else	1107	else
673	ev_timer_stop (w); /* nonrepeating: stop timer */	1108	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
674		1109
675	event ((W)w, EV_TIMEOUT);	1110	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
676	}	1111	}
677	}	1112	}
678		1113
679	static void	1114	#if EV_PERIODICS
		1115	inline void
680	periodics_reify (void)	1116	periodics_reify (EV_P)
681	{	1117	{
682	while (periodiccnt && periodics [0]->at <= ev_now)	1118	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
683	{	1119	{
684	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)));
685		1123
686	/* first reschedule or stop timer */	1124	/* first reschedule or stop timer */
687	if (w->interval)	1125	if (w->reschedule_cb)
688	{	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	{
689	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1133	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
690	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	1134	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
691	downheap ((WT *)periodics, periodiccnt, 0);	1135	downheap ((WT *)periodics, periodiccnt, 0);
692	}	1136	}
693	else	1137	else
694	ev_periodic_stop (w); /* nonrepeating: stop timer */	1138	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
695		1139
696	event ((W)w, EV_PERIODIC);	1140	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
697	}	1141	}
698	}	1142	}
699		1143
700	static void	1144	static void
701	periodics_reschedule (ev_tstamp diff)	1145	periodics_reschedule (EV_P)
702	{	1146	{
703	int i;	1147	int i;
704		1148
705	/* adjust periodics after time jump */	1149	/* adjust periodics after time jump */
706	for (i = 0; i < periodiccnt; ++i)	1150	for (i = 0; i < periodiccnt; ++i)
707	{	1151	{
708	struct ev_periodic *w = periodics [i];	1152	ev_periodic *w = periodics [i];
709		1153
		1154	if (w->reschedule_cb)
		1155	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
710	if (w->interval)	1156	else if (w->interval)
711	{
712	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1157	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
713
714	if (fabs (diff) >= 1e-4)
715	{
716	ev_periodic_stop (w);
717	ev_periodic_start (w);
718
719	i = 0; /* restart loop, inefficient, but time jumps should be rare */
720	}
721	}
722	}	1158	}
723	}
724		1159
725	static int	1160	/* now rebuild the heap */
		1161	for (i = periodiccnt >> 1; i--; )
		1162	downheap ((WT *)periodics, periodiccnt, i);
		1163	}
		1164	#endif
		1165
		1166	inline int
726	time_update_monotonic (void)	1167	time_update_monotonic (EV_P)
727	{	1168	{
728	now = get_clock ();	1169	mn_now = get_clock ();
729		1170
730	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))	1171	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
731	{	1172	{
732	ev_now = now + diff;	1173	ev_rt_now = rtmn_diff + mn_now;
733	return 0;	1174	return 0;
734	}	1175	}
735	else	1176	else
736	{	1177	{
737	now_floor = now;	1178	now_floor = mn_now;
738	ev_now = ev_time ();	1179	ev_rt_now = ev_time ();
739	return 1;	1180	return 1;
740	}	1181	}
741	}	1182	}
742		1183
743	static void	1184	inline void
744	time_update (void)	1185	time_update (EV_P)
745	{	1186	{
746	int i;	1187	int i;
747		1188
748	#if EV_USE_MONOTONIC	1189	#if EV_USE_MONOTONIC
749	if (expect_true (have_monotonic))	1190	if (expect_true (have_monotonic))
750	{	1191	{
751	if (time_update_monotonic ())	1192	if (time_update_monotonic (EV_A))
752	{	1193	{
753	ev_tstamp odiff = diff;	1194	ev_tstamp odiff = rtmn_diff;
754		1195
755	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; )
756	{	1205	{
757	diff = ev_now - now;	1206	rtmn_diff = ev_rt_now - mn_now;
758		1207
759	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1208	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
760	return; /* all is well */	1209	return; /* all is well */
761		1210
762	ev_now = ev_time ();	1211	ev_rt_now = ev_time ();
763	now = get_clock ();	1212	mn_now = get_clock ();
764	now_floor = now;	1213	now_floor = mn_now;
765	}	1214	}
766		1215
		1216	# if EV_PERIODICS
767	periodics_reschedule (diff - odiff);	1217	periodics_reschedule (EV_A);
		1218	# endif
768	/* no timer adjustment, as the monotonic clock doesn't jump */	1219	/* no timer adjustment, as the monotonic clock doesn't jump */
		1220	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
769	}	1221	}
770	}	1222	}
771	else	1223	else
772	#endif	1224	#endif
773	{	1225	{
774	ev_now = ev_time ();	1226	ev_rt_now = ev_time ();
775		1227
776	if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1228	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
777	{	1229	{
		1230	#if EV_PERIODICS
778	periodics_reschedule (ev_now - now);	1231	periodics_reschedule (EV_A);
		1232	#endif
779		1233
780	/* 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 */
781	for (i = 0; i < timercnt; ++i)	1235	for (i = 0; i < timercnt; ++i)
782	timers [i]->at += diff;	1236	((WT)timers [i])->at += ev_rt_now - mn_now;
783	}	1237	}
784		1238
785	now = ev_now;	1239	mn_now = ev_rt_now;
786	}	1240	}
787	}	1241	}
788		1242
789	int ev_loop_done;	1243	void
		1244	ev_ref (EV_P)
		1245	{
		1246	++activecnt;
		1247	}
790		1248
		1249	void
		1250	ev_unref (EV_P)
		1251	{
		1252	--activecnt;
		1253	}
		1254
		1255	static int loop_done;
		1256
		1257	void
791	void ev_loop (int flags)	1258	ev_loop (EV_P_ int flags)
792	{	1259	{
793	double block;
794	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1260	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1261	? EVUNLOOP_ONE
		1262	: EVUNLOOP_CANCEL;
795		1263
796	do	1264	while (activecnt)
797	{	1265	{
798	/* queue check watchers (and execute them) */	1266	/* queue check watchers (and execute them) */
799	if (expect_false (preparecnt))	1267	if (expect_false (preparecnt))
800	{	1268	{
801	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1269	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
802	call_pending ();	1270	call_pending (EV_A);
803	}	1271	}
804		1272
		1273	/* we might have forked, so reify kernel state if necessary */
		1274	if (expect_false (postfork))
		1275	loop_fork (EV_A);
		1276
805	/* update fd-related kernel structures */	1277	/* update fd-related kernel structures */
806	fd_reify ();	1278	fd_reify (EV_A);
807		1279
808	/* calculate blocking time */	1280	/* calculate blocking time */
		1281	{
		1282	double block;
809		1283
810	/* we only need this for !monotonic clockor timers, but as we basically	1284	if (flags & EVLOOP_NONBLOCK || idlecnt)
811	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 */
812	#if EV_USE_MONOTONIC	1289	#if EV_USE_MONOTONIC
813	if (expect_true (have_monotonic))	1290	if (expect_true (have_monotonic))
814	time_update_monotonic ();	1291	time_update_monotonic (EV_A);
815	else	1292	else
816	#endif	1293	#endif
817	{	1294	{
818	ev_now = ev_time ();	1295	ev_rt_now = ev_time ();
819	now = ev_now;	1296	mn_now = ev_rt_now;
820	}	1297	}
821		1298
822	if (flags & EVLOOP_NONBLOCK || idlecnt)
823	block = 0.;
824	else
825	{
826	block = MAX_BLOCKTIME;	1299	block = MAX_BLOCKTIME;
827		1300
828	if (timercnt)	1301	if (timercnt)
829	{	1302	{
830	ev_tstamp to = timers [0]->at - now + method_fudge;	1303	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
831	if (block > to) block = to;	1304	if (block > to) block = to;
832	}	1305	}
833		1306
		1307	#if EV_PERIODICS
834	if (periodiccnt)	1308	if (periodiccnt)
835	{	1309	{
836	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1310	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
837	if (block > to) block = to;	1311	if (block > to) block = to;
838	}	1312	}
		1313	#endif
839		1314
840	if (block < 0.) block = 0.;	1315	if (expect_false (block < 0.)) block = 0.;
841	}	1316	}
842		1317
843	method_poll (block);	1318	backend_poll (EV_A_ block);
		1319	}
844		1320
845	/* update ev_now, do magic */	1321	/* update ev_rt_now, do magic */
846	time_update ();	1322	time_update (EV_A);
847		1323
848	/* queue pending timers and reschedule them */	1324	/* queue pending timers and reschedule them */
849	timers_reify (); /* relative timers called last */	1325	timers_reify (EV_A); /* relative timers called last */
		1326	#if EV_PERIODICS
850	periodics_reify (); /* absolute timers called first */	1327	periodics_reify (EV_A); /* absolute timers called first */
		1328	#endif
851		1329
852	/* queue idle watchers unless io or timers are pending */	1330	/* queue idle watchers unless other events are pending */
853	if (!pendingcnt)	1331	if (idlecnt && !any_pending (EV_A))
854	queue_events ((W *)idles, idlecnt, EV_IDLE);	1332	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
855		1333
856	/* queue check watchers, to be executed first */	1334	/* queue check watchers, to be executed first */
857	if (checkcnt)	1335	if (expect_false (checkcnt))
858	queue_events ((W *)checks, checkcnt, EV_CHECK);	1336	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
859		1337
860	call_pending ();	1338	call_pending (EV_A);
861	}
862	while (!ev_loop_done);
863		1339
864	if (ev_loop_done != 2)	1340	if (expect_false (loop_done))
		1341	break;
		1342	}
		1343
		1344	if (loop_done == EVUNLOOP_ONE)
		1345	loop_done = EVUNLOOP_CANCEL;
		1346	}
		1347
		1348	void
		1349	ev_unloop (EV_P_ int how)
		1350	{
865	ev_loop_done = 0;	1351	loop_done = how;
866	}	1352	}
867		1353
868	/*****************************************************************************/	1354	/*****************************************************************************/
869		1355
870	static void	1356	inline void
871	wlist_add (WL *head, WL elem)	1357	wlist_add (WL *head, WL elem)
872	{	1358	{
873	elem->next = *head;	1359	elem->next = *head;
874	*head = elem;	1360	*head = elem;
875	}	1361	}
876		1362
877	static void	1363	inline void
878	wlist_del (WL *head, WL elem)	1364	wlist_del (WL *head, WL elem)
879	{	1365	{
880	while (*head)	1366	while (*head)
881	{	1367	{
882	if (*head == elem)	1368	if (*head == elem)
…		…
887		1373
888	head = &(*head)->next;	1374	head = &(*head)->next;
889	}	1375	}
890	}	1376	}
891		1377
892	static void	1378	inline void
893	ev_clear_pending (W w)	1379	ev_clear_pending (EV_P_ W w)
894	{	1380	{
895	if (w->pending)	1381	if (w->pending)
896	{	1382	{
897	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1383	pendings [ABSPRI (w)][w->pending - 1].w = 0;
898	w->pending = 0;	1384	w->pending = 0;
899	}	1385	}
900	}	1386	}
901		1387
902	static void	1388	inline void
903	ev_start (W w, int active)	1389	ev_start (EV_P_ W w, int active)
904	{	1390	{
905	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1391	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
906	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;	1392	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
907		1393
908	w->active = active;	1394	w->active = active;
		1395	ev_ref (EV_A);
909	}	1396	}
910		1397
911	static void	1398	inline void
912	ev_stop (W w)	1399	ev_stop (EV_P_ W w)
913	{	1400	{
		1401	ev_unref (EV_A);
914	w->active = 0;	1402	w->active = 0;
915	}	1403	}
916		1404
917	/*****************************************************************************/	1405	/*****************************************************************************/
918		1406
919	void	1407	void
920	ev_io_start (struct ev_io *w)	1408	ev_io_start (EV_P_ ev_io *w)
921	{	1409	{
922	int fd = w->fd;	1410	int fd = w->fd;
923		1411
924	if (ev_is_active (w))	1412	if (expect_false (ev_is_active (w)))
925	return;	1413	return;
926		1414
927	assert (("ev_io_start called with negative fd", fd >= 0));	1415	assert (("ev_io_start called with negative fd", fd >= 0));
928		1416
929	ev_start ((W)w, 1);	1417	ev_start (EV_A_ (W)w, 1);
930	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1418	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
931	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1419	wlist_add ((WL *)&anfds[fd].head, (WL)w);
932		1420
933	fd_change (fd);	1421	fd_change (EV_A_ fd);
934	}	1422	}
935		1423
936	void	1424	void
937	ev_io_stop (struct ev_io *w)	1425	ev_io_stop (EV_P_ ev_io *w)
938	{	1426	{
939	ev_clear_pending ((W)w);	1427	ev_clear_pending (EV_A_ (W)w);
940	if (!ev_is_active (w))	1428	if (expect_false (!ev_is_active (w)))
941	return;	1429	return;
		1430
		1431	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
942		1432
943	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1433	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
944	ev_stop ((W)w);	1434	ev_stop (EV_A_ (W)w);
945		1435
946	fd_change (w->fd);	1436	fd_change (EV_A_ w->fd);
947	}	1437	}
948		1438
949	void	1439	void
950	ev_timer_start (struct ev_timer *w)	1440	ev_timer_start (EV_P_ ev_timer *w)
951	{	1441	{
952	if (ev_is_active (w))	1442	if (expect_false (ev_is_active (w)))
953	return;	1443	return;
954		1444
955	w->at += now;	1445	((WT)w)->at += mn_now;
956		1446
957	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.));
958		1448
959	ev_start ((W)w, ++timercnt);	1449	ev_start (EV_A_ (W)w, ++timercnt);
960	array_needsize (timers, timermax, timercnt, );	1450	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
961	timers [timercnt - 1] = w;	1451	timers [timercnt - 1] = w;
962	upheap ((WT *)timers, timercnt - 1);	1452	upheap ((WT *)timers, timercnt - 1);
963	}
964		1453
		1454	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1455	}
		1456
965	void	1457	void
966	ev_timer_stop (struct ev_timer *w)	1458	ev_timer_stop (EV_P_ ev_timer *w)
967	{	1459	{
968	ev_clear_pending ((W)w);	1460	ev_clear_pending (EV_A_ (W)w);
969	if (!ev_is_active (w))	1461	if (expect_false (!ev_is_active (w)))
970	return;	1462	return;
971		1463
		1464	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1465
972	if (w->active < timercnt--)	1466	if (expect_true (((W)w)->active < timercnt--))
973	{	1467	{
974	timers [w->active - 1] = timers [timercnt];	1468	timers [((W)w)->active - 1] = timers [timercnt];
975	downheap ((WT *)timers, timercnt, w->active - 1);	1469	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
976	}	1470	}
977		1471
978	w->at = w->repeat;	1472	((WT)w)->at -= mn_now;
979		1473
980	ev_stop ((W)w);	1474	ev_stop (EV_A_ (W)w);
981	}	1475	}
982		1476
983	void	1477	void
984	ev_timer_again (struct ev_timer *w)	1478	ev_timer_again (EV_P_ ev_timer *w)
985	{	1479	{
986	if (ev_is_active (w))	1480	if (ev_is_active (w))
987	{	1481	{
988	if (w->repeat)	1482	if (w->repeat)
989	{	1483	{
990	w->at = now + w->repeat;	1484	((WT)w)->at = mn_now + w->repeat;
991	downheap ((WT *)timers, timercnt, w->active - 1);	1485	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
992	}	1486	}
993	else	1487	else
994	ev_timer_stop (w);	1488	ev_timer_stop (EV_A_ w);
995	}	1489	}
996	else if (w->repeat)	1490	else if (w->repeat)
		1491	{
		1492	w->at = w->repeat;
997	ev_timer_start (w);	1493	ev_timer_start (EV_A_ w);
		1494	}
998	}	1495	}
999		1496
		1497	#if EV_PERIODICS
1000	void	1498	void
1001	ev_periodic_start (struct ev_periodic *w)	1499	ev_periodic_start (EV_P_ ev_periodic *w)
1002	{	1500	{
1003	if (ev_is_active (w))	1501	if (expect_false (ev_is_active (w)))
1004	return;	1502	return;
1005		1503
		1504	if (w->reschedule_cb)
		1505	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1506	else if (w->interval)
		1507	{
1006	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.));
1007
1008	/* 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 */
1009	if (w->interval)
1010	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1510	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1511	}
1011		1512
1012	ev_start ((W)w, ++periodiccnt);	1513	ev_start (EV_A_ (W)w, ++periodiccnt);
1013	array_needsize (periodics, periodicmax, periodiccnt, );	1514	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
1014	periodics [periodiccnt - 1] = w;	1515	periodics [periodiccnt - 1] = w;
1015	upheap ((WT *)periodics, periodiccnt - 1);	1516	upheap ((WT *)periodics, periodiccnt - 1);
1016	}
1017		1517
		1518	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1519	}
		1520
1018	void	1521	void
1019	ev_periodic_stop (struct ev_periodic *w)	1522	ev_periodic_stop (EV_P_ ev_periodic *w)
1020	{	1523	{
1021	ev_clear_pending ((W)w);	1524	ev_clear_pending (EV_A_ (W)w);
1022	if (!ev_is_active (w))	1525	if (expect_false (!ev_is_active (w)))
1023	return;	1526	return;
1024		1527
		1528	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1529
1025	if (w->active < periodiccnt--)	1530	if (expect_true (((W)w)->active < periodiccnt--))
1026	{	1531	{
1027	periodics [w->active - 1] = periodics [periodiccnt];	1532	periodics [((W)w)->active - 1] = periodics [periodiccnt];
1028	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1533	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
1029	}	1534	}
1030		1535
1031	ev_stop ((W)w);	1536	ev_stop (EV_A_ (W)w);
		1537	}
		1538
		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
		1549	ev_idle_start (EV_P_ ev_idle *w)
		1550	{
		1551	if (expect_false (ev_is_active (w)))
		1552	return;
		1553
		1554	ev_start (EV_A_ (W)w, ++idlecnt);
		1555	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1556	idles [idlecnt - 1] = w;
		1557	}
		1558
		1559	void
		1560	ev_idle_stop (EV_P_ ev_idle *w)
		1561	{
		1562	ev_clear_pending (EV_A_ (W)w);
		1563	if (expect_false (!ev_is_active (w)))
		1564	return;
		1565
		1566	{
		1567	int active = ((W)w)->active;
		1568	idles [active - 1] = idles [--idlecnt];
		1569	((W)idles [active - 1])->active = active;
		1570	}
		1571
		1572	ev_stop (EV_A_ (W)w);
		1573	}
		1574
		1575	void
		1576	ev_prepare_start (EV_P_ ev_prepare *w)
		1577	{
		1578	if (expect_false (ev_is_active (w)))
		1579	return;
		1580
		1581	ev_start (EV_A_ (W)w, ++preparecnt);
		1582	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1583	prepares [preparecnt - 1] = w;
		1584	}
		1585
		1586	void
		1587	ev_prepare_stop (EV_P_ ev_prepare *w)
		1588	{
		1589	ev_clear_pending (EV_A_ (W)w);
		1590	if (expect_false (!ev_is_active (w)))
		1591	return;
		1592
		1593	{
		1594	int active = ((W)w)->active;
		1595	prepares [active - 1] = prepares [--preparecnt];
		1596	((W)prepares [active - 1])->active = active;
		1597	}
		1598
		1599	ev_stop (EV_A_ (W)w);
		1600	}
		1601
		1602	void
		1603	ev_check_start (EV_P_ ev_check *w)
		1604	{
		1605	if (expect_false (ev_is_active (w)))
		1606	return;
		1607
		1608	ev_start (EV_A_ (W)w, ++checkcnt);
		1609	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1610	checks [checkcnt - 1] = w;
		1611	}
		1612
		1613	void
		1614	ev_check_stop (EV_P_ ev_check *w)
		1615	{
		1616	ev_clear_pending (EV_A_ (W)w);
		1617	if (expect_false (!ev_is_active (w)))
		1618	return;
		1619
		1620	{
		1621	int active = ((W)w)->active;
		1622	checks [active - 1] = checks [--checkcnt];
		1623	((W)checks [active - 1])->active = active;
		1624	}
		1625
		1626	ev_stop (EV_A_ (W)w);
1032	}	1627	}
1033		1628
1034	#ifndef SA_RESTART	1629	#ifndef SA_RESTART
1035	# define SA_RESTART 0	1630	# define SA_RESTART 0
1036	#endif	1631	#endif
1037		1632
1038	void	1633	void
1039	ev_signal_start (struct ev_signal *w)	1634	ev_signal_start (EV_P_ ev_signal *w)
1040	{	1635	{
		1636	#if EV_MULTIPLICITY
		1637	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1638	#endif
1041	if (ev_is_active (w))	1639	if (expect_false (ev_is_active (w)))
1042	return;	1640	return;
1043		1641
1044	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));
1045		1643
1046	ev_start ((W)w, 1);	1644	ev_start (EV_A_ (W)w, 1);
1047	array_needsize (signals, signalmax, w->signum, signals_init);	1645	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1048	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1646	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1049		1647
1050	if (!w->next)	1648	if (!((WL)w)->next)
1051	{	1649	{
		1650	#if _WIN32
		1651	signal (w->signum, sighandler);
		1652	#else
1052	struct sigaction sa;	1653	struct sigaction sa;
1053	sa.sa_handler = sighandler;	1654	sa.sa_handler = sighandler;
1054	sigfillset (&sa.sa_mask);	1655	sigfillset (&sa.sa_mask);
1055	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 */
1056	sigaction (w->signum, &sa, 0);	1657	sigaction (w->signum, &sa, 0);
		1658	#endif
1057	}	1659	}
1058	}	1660	}
1059		1661
1060	void	1662	void
1061	ev_signal_stop (struct ev_signal *w)	1663	ev_signal_stop (EV_P_ ev_signal *w)
1062	{	1664	{
1063	ev_clear_pending ((W)w);	1665	ev_clear_pending (EV_A_ (W)w);
1064	if (!ev_is_active (w))	1666	if (expect_false (!ev_is_active (w)))
1065	return;	1667	return;
1066		1668
1067	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1669	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1068	ev_stop ((W)w);	1670	ev_stop (EV_A_ (W)w);
1069		1671
1070	if (!signals [w->signum - 1].head)	1672	if (!signals [w->signum - 1].head)
1071	signal (w->signum, SIG_DFL);	1673	signal (w->signum, SIG_DFL);
1072	}	1674	}
1073		1675
1074	void	1676	void
1075	ev_idle_start (struct ev_idle *w)
1076	{
1077	if (ev_is_active (w))
1078	return;
1079
1080	ev_start ((W)w, ++idlecnt);
1081	array_needsize (idles, idlemax, idlecnt, );
1082	idles [idlecnt - 1] = w;
1083	}
1084
1085	void
1086	ev_idle_stop (struct ev_idle *w)
1087	{
1088	ev_clear_pending ((W)w);
1089	if (ev_is_active (w))
1090	return;
1091
1092	idles [w->active - 1] = idles [--idlecnt];
1093	ev_stop ((W)w);
1094	}
1095
1096	void
1097	ev_prepare_start (struct ev_prepare *w)
1098	{
1099	if (ev_is_active (w))
1100	return;
1101
1102	ev_start ((W)w, ++preparecnt);
1103	array_needsize (prepares, preparemax, preparecnt, );
1104	prepares [preparecnt - 1] = w;
1105	}
1106
1107	void
1108	ev_prepare_stop (struct ev_prepare *w)
1109	{
1110	ev_clear_pending ((W)w);
1111	if (ev_is_active (w))
1112	return;
1113
1114	prepares [w->active - 1] = prepares [--preparecnt];
1115	ev_stop ((W)w);
1116	}
1117
1118	void
1119	ev_check_start (struct ev_check *w)
1120	{
1121	if (ev_is_active (w))
1122	return;
1123
1124	ev_start ((W)w, ++checkcnt);
1125	array_needsize (checks, checkmax, checkcnt, );
1126	checks [checkcnt - 1] = w;
1127	}
1128
1129	void
1130	ev_check_stop (struct ev_check *w)
1131	{
1132	ev_clear_pending ((W)w);
1133	if (ev_is_active (w))
1134	return;
1135
1136	checks [w->active - 1] = checks [--checkcnt];
1137	ev_stop ((W)w);
1138	}
1139
1140	void
1141	ev_child_start (struct ev_child *w)	1677	ev_child_start (EV_P_ ev_child *w)
1142	{	1678	{
		1679	#if EV_MULTIPLICITY
		1680	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1681	#endif
1143	if (ev_is_active (w))	1682	if (expect_false (ev_is_active (w)))
1144	return;	1683	return;
1145		1684
1146	ev_start ((W)w, 1);	1685	ev_start (EV_A_ (W)w, 1);
1147	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1686	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1148	}	1687	}
1149		1688
1150	void	1689	void
1151	ev_child_stop (struct ev_child *w)	1690	ev_child_stop (EV_P_ ev_child *w)
1152	{	1691	{
1153	ev_clear_pending ((W)w);	1692	ev_clear_pending (EV_A_ (W)w);
1154	if (ev_is_active (w))	1693	if (expect_false (!ev_is_active (w)))
1155	return;	1694	return;
1156		1695
1157	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1696	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1158	ev_stop ((W)w);	1697	ev_stop (EV_A_ (W)w);
1159	}	1698	}
		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
1160		1746
1161	/*****************************************************************************/	1747	/*****************************************************************************/
1162		1748
1163	struct ev_once	1749	struct ev_once
1164	{	1750	{
1165	struct ev_io io;	1751	ev_io io;
1166	struct ev_timer to;	1752	ev_timer to;
1167	void (*cb)(int revents, void *arg);	1753	void (*cb)(int revents, void *arg);
1168	void *arg;	1754	void *arg;
1169	};	1755	};
1170		1756
1171	static void	1757	static void
1172	once_cb (struct ev_once *once, int revents)	1758	once_cb (EV_P_ struct ev_once *once, int revents)
1173	{	1759	{
1174	void (*cb)(int revents, void *arg) = once->cb;	1760	void (*cb)(int revents, void *arg) = once->cb;
1175	void *arg = once->arg;	1761	void *arg = once->arg;
1176		1762
1177	ev_io_stop (&once->io);	1763	ev_io_stop (EV_A_ &once->io);
1178	ev_timer_stop (&once->to);	1764	ev_timer_stop (EV_A_ &once->to);
1179	free (once);	1765	ev_free (once);
1180		1766
1181	cb (revents, arg);	1767	cb (revents, arg);
1182	}	1768	}
1183		1769
1184	static void	1770	static void
1185	once_cb_io (struct ev_io *w, int revents)	1771	once_cb_io (EV_P_ ev_io *w, int revents)
1186	{	1772	{
1187	once_cb ((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);
1188	}	1774	}
1189		1775
1190	static void	1776	static void
1191	once_cb_to (struct ev_timer *w, int revents)	1777	once_cb_to (EV_P_ ev_timer *w, int revents)
1192	{	1778	{
1193	once_cb ((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);
1194	}	1780	}
1195		1781
1196	void	1782	void
1197	ev_once (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)
1198	{	1784	{
1199	struct ev_once *once = malloc (sizeof (struct ev_once));	1785	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1200		1786
1201	if (!once)	1787	if (expect_false (!once))
		1788	{
1202	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1789	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1203	else	1790	return;
1204	{	1791	}
		1792
1205	once->cb = cb;	1793	once->cb = cb;
1206	once->arg = arg;	1794	once->arg = arg;
1207		1795
1208	ev_watcher_init (&once->io, once_cb_io);	1796	ev_init (&once->io, once_cb_io);
1209	if (fd >= 0)	1797	if (fd >= 0)
1210	{	1798	{
1211	ev_io_set (&once->io, fd, events);	1799	ev_io_set (&once->io, fd, events);
1212	ev_io_start (&once->io);	1800	ev_io_start (EV_A_ &once->io);
1213	}	1801	}
1214		1802
1215	ev_watcher_init (&once->to, once_cb_to);	1803	ev_init (&once->to, once_cb_to);
1216	if (timeout >= 0.)	1804	if (timeout >= 0.)
1217	{	1805	{
1218	ev_timer_set (&once->to, timeout, 0.);	1806	ev_timer_set (&once->to, timeout, 0.);
1219	ev_timer_start (&once->to);	1807	ev_timer_start (EV_A_ &once->to);
1220	}
1221	}
1222	}
1223
1224	/*****************************************************************************/
1225
1226	#if 0
1227
1228	struct ev_io wio;
1229
1230	static void
1231	sin_cb (struct ev_io *w, int revents)
1232	{
1233	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1234	}
1235
1236	static void
1237	ocb (struct ev_timer *w, int revents)
1238	{
1239	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1240	ev_timer_stop (w);
1241	ev_timer_start (w);
1242	}
1243
1244	static void
1245	scb (struct ev_signal *w, int revents)
1246	{
1247	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1248	ev_io_stop (&wio);
1249	ev_io_start (&wio);
1250	}
1251
1252	static void
1253	gcb (struct ev_signal *w, int revents)
1254	{
1255	fprintf (stderr, "generic %x\n", revents);
1256
1257	}
1258
1259	int main (void)
1260	{
1261	ev_init (0);
1262
1263	ev_io_init (&wio, sin_cb, 0, EV_READ);
1264	ev_io_start (&wio);
1265
1266	struct ev_timer t[10000];
1267
1268	#if 0
1269	int i;
1270	for (i = 0; i < 10000; ++i)
1271	{	1808	}
1272	struct ev_timer *w = t + i;
1273	ev_watcher_init (w, ocb, i);
1274	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1275	ev_timer_start (w);
1276	if (drand48 () < 0.5)
1277	ev_timer_stop (w);
1278	}
1279	#endif
1280
1281	struct ev_timer t1;
1282	ev_timer_init (&t1, ocb, 5, 10);
1283	ev_timer_start (&t1);
1284
1285	struct ev_signal sig;
1286	ev_signal_init (&sig, scb, SIGQUIT);
1287	ev_signal_start (&sig);
1288
1289	struct ev_check cw;
1290	ev_check_init (&cw, gcb);
1291	ev_check_start (&cw);
1292
1293	struct ev_idle iw;
1294	ev_idle_init (&iw, gcb);
1295	ev_idle_start (&iw);
1296
1297	ev_loop (0);
1298
1299	return 0;
1300	}	1809	}
1301		1810
		1811	#ifdef __cplusplus
		1812	}
1302	#endif	1813	#endif
1303		1814
1304
1305
1306

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