[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.52 by root, Sat Nov 3 22:10:39 2007 UTC vs.
Revision 1.136 by root, Sat Nov 24 07:14:26 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_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
		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, mn_now, diff; /* monotonic clock */	211	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
119	static ev_tstamp rt_now;
120	static int method;
121		212
122	static int have_monotonic; /* runtime */	213	#ifdef _WIN32
123		214	# include "ev_win32.c"
124	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
125	static void (*method_modify)(EV_P_ int fd, int oev, int nev);
126	static void (*method_poll)(EV_P_ ev_tstamp timeout);
127
128	static int activecnt; /* number of active events */
129
130	#if EV_USE_SELECT
131	static unsigned char vec_ri, vec_ro, vec_wi, vec_wo;
132	static int vec_max;
133	#endif
134
135	#if EV_USEV_POLL
136	static struct pollfd *polls;
137	static int pollmax, pollcnt;
138	static int pollidxs; / maps fds into structure indices */
139	static int pollidxmax;
140	#endif
141
142	#if EV_USE_EPOLL
143	static int epoll_fd = -1;
144
145	static struct epoll_event *events;
146	static int eventmax;
147	#endif
148
149	#if EV_USE_KQUEUE
150	static int kqueue_fd;
151	static struct kevent *kqueue_changes;
152	static int kqueue_changemax, kqueue_changecnt;
153	static struct kevent *kqueue_events;
154	static int kqueue_eventmax;
155	#endif	215	#endif
156		216
157	/*****************************************************************************/	217	/*****************************************************************************/
158		218
159	inline ev_tstamp	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
		300	ev_tstamp ev_rt_now;
		301	#define VAR(name,decl) static decl;
		302	#include "ev_vars.h"
		303	#undef VAR
		304
		305	static int ev_default_loop_ptr;
		306
		307	#endif
		308
		309	/*****************************************************************************/
		310
		311	ev_tstamp
160	ev_time (void)	312	ev_time (void)
161	{	313	{
162	#if EV_USE_REALTIME	314	#if EV_USE_REALTIME
163	struct timespec ts;	315	struct timespec ts;
164	clock_gettime (CLOCK_REALTIME, &ts);	316	clock_gettime (CLOCK_REALTIME, &ts);
…		…
183	#endif	335	#endif
184		336
185	return ev_time ();	337	return ev_time ();
186	}	338	}
187		339
		340	#if EV_MULTIPLICITY
188	ev_tstamp	341	ev_tstamp
189	ev_now (EV_P)	342	ev_now (EV_P)
190	{	343	{
191	return rt_now;	344	return ev_rt_now;
192	}	345	}
		346	#endif
193		347
194	#define array_roundsize(base,n) ((n) \| 4 & ~3)	348	#define array_roundsize(type,n) (((n) \| 4) & ~3)
195		349
196	#define array_needsize(base,cur,cnt,init) \	350	#define array_needsize(type,base,cur,cnt,init) \
197	if (expect_false ((cnt) > cur)) \	351	if (expect_false ((cnt) > cur)) \
198	{ \	352	{ \
199	int newcnt = cur; \	353	int newcnt = cur; \
200	do \	354	do \
201	{ \	355	{ \
202	newcnt = array_roundsize (base, newcnt << 1); \	356	newcnt = array_roundsize (type, newcnt << 1); \
203	} \	357	} \
204	while ((cnt) > newcnt); \	358	while ((cnt) > newcnt); \
205	\	359	\
206	base = realloc (base, sizeof (base) (newcnt)); \	360	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
207	init (base + cur, newcnt - cur); \	361	init (base + cur, newcnt - cur); \
208	cur = newcnt; \	362	cur = newcnt; \
209	}	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;
210		375
211	/*****************************************************************************/	376	/*****************************************************************************/
212
213	typedef struct
214	{
215	struct ev_watcher_list *head;
216	unsigned char events;
217	unsigned char reify;
218	} ANFD;
219
220	static ANFD *anfds;
221	static int anfdmax;
222		377
223	static void	378	static void
224	anfds_init (ANFD *base, int count)	379	anfds_init (ANFD *base, int count)
225	{	380	{
226	while (count--)	381	while (count--)
…		…
231		386
232	++base;	387	++base;
233	}	388	}
234	}	389	}
235		390
236	typedef struct	391	void
237	{
238	W w;
239	int events;
240	} ANPENDING;
241
242	static ANPENDING *pendings [NUMPRI];
243	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
244
245	static void
246	event (EV_P_ W w, int events)	392	ev_feed_event (EV_P_ void *w, int revents)
247	{	393	{
248	if (w->pending)	394	W w_ = (W)w;
		395
		396	if (expect_false (w_->pending))
249	{	397	{
250	pendings [ABSPRI (w)][w->pending - 1].events \|= events;	398	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
251	return;	399	return;
252	}	400	}
253		401
254	w->pending = ++pendingcnt [ABSPRI (w)];	402	w_->pending = ++pendingcnt [ABSPRI (w_)];
255	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);
256	pendings [ABSPRI (w)][w->pending - 1].w = w;	404	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
257	pendings [ABSPRI (w)][w->pending - 1].events = events;	405	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
258	}	406	}
259		407
260	static void	408	static void
261	queue_events (EV_P_ W *events, int eventcnt, int type)	409	queue_events (EV_P_ W *events, int eventcnt, int type)
262	{	410	{
263	int i;	411	int i;
264		412
265	for (i = 0; i < eventcnt; ++i)	413	for (i = 0; i < eventcnt; ++i)
266	event (EV_A_ events [i], type);	414	ev_feed_event (EV_A_ events [i], type);
267	}	415	}
268		416
269	static void	417	inline void
270	fd_event (EV_P_ int fd, int events)	418	fd_event (EV_P_ int fd, int revents)
271	{	419	{
272	ANFD *anfd = anfds + fd;	420	ANFD *anfd = anfds + fd;
273	struct ev_io *w;	421	ev_io *w;
274		422
275	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)
276	{	424	{
277	int ev = w->events & events;	425	int ev = w->events & revents;
278		426
279	if (ev)	427	if (ev)
280	event (EV_A_ (W)w, ev);	428	ev_feed_event (EV_A_ (W)w, ev);
281	}	429	}
		430	}
		431
		432	void
		433	ev_feed_fd_event (EV_P_ int fd, int revents)
		434	{
		435	fd_event (EV_A_ fd, revents);
282	}	436	}
283		437
284	/*****************************************************************************/	438	/*****************************************************************************/
285		439
286	static int *fdchanges;	440	inline void
287	static int fdchangemax, fdchangecnt;
288
289	static void
290	fd_reify (EV_P)	441	fd_reify (EV_P)
291	{	442	{
292	int i;	443	int i;
293		444
294	for (i = 0; i < fdchangecnt; ++i)	445	for (i = 0; i < fdchangecnt; ++i)
295	{	446	{
296	int fd = fdchanges [i];	447	int fd = fdchanges [i];
297	ANFD *anfd = anfds + fd;	448	ANFD *anfd = anfds + fd;
298	struct ev_io *w;	449	ev_io *w;
299		450
300	int events = 0;	451	int events = 0;
301		452
302	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)
303	events \|= w->events;	454	events \|= w->events;
304		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
305	anfd->reify = 0;	465	anfd->reify = 0;
306		466
307	if (anfd->events != events)
308	{
309	method_modify (EV_A_ fd, anfd->events, events);	467	backend_modify (EV_A_ fd, anfd->events, events);
310	anfd->events = events;	468	anfd->events = events;
311	}
312	}	469	}
313		470
314	fdchangecnt = 0;	471	fdchangecnt = 0;
315	}	472	}
316		473
317	static void	474	static void
318	fd_change (EV_P_ int fd)	475	fd_change (EV_P_ int fd)
319	{	476	{
320	if (anfds [fd].reify \|\| fdchangecnt < 0)	477	if (expect_false (anfds [fd].reify))
321	return;	478	return;
322		479
323	anfds [fd].reify = 1;	480	anfds [fd].reify = 1;
324		481
325	++fdchangecnt;	482	++fdchangecnt;
326	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	483	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
327	fdchanges [fdchangecnt - 1] = fd;	484	fdchanges [fdchangecnt - 1] = fd;
328	}	485	}
329		486
330	static void	487	static void
331	fd_kill (EV_P_ int fd)	488	fd_kill (EV_P_ int fd)
332	{	489	{
333	struct ev_io *w;	490	ev_io *w;
334		491
335	while ((w = (struct ev_io *)anfds [fd].head))	492	while ((w = (ev_io *)anfds [fd].head))
336	{	493	{
337	ev_io_stop (EV_A_ w);	494	ev_io_stop (EV_A_ w);
338	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);
339	}	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
340	}	507	}
341		508
342	/* called on EBADF to verify fds */	509	/* called on EBADF to verify fds */
343	static void	510	static void
344	fd_ebadf (EV_P)	511	fd_ebadf (EV_P)
345	{	512	{
346	int fd;	513	int fd;
347		514
348	for (fd = 0; fd < anfdmax; ++fd)	515	for (fd = 0; fd < anfdmax; ++fd)
349	if (anfds [fd].events)	516	if (anfds [fd].events)
350	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	517	if (!fd_valid (fd) == -1 && errno == EBADF)
351	fd_kill (EV_A_ fd);	518	fd_kill (EV_A_ fd);
352	}	519	}
353		520
354	/* 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 */
355	static void	522	static void
356	fd_enomem (EV_P)	523	fd_enomem (EV_P)
357	{	524	{
358	int fd = anfdmax;	525	int fd;
359		526
360	while (fd--)	527	for (fd = anfdmax; fd--; )
361	if (anfds [fd].events)	528	if (anfds [fd].events)
362	{	529	{
363	close (fd);
364	fd_kill (EV_A_ fd);	530	fd_kill (EV_A_ fd);
365	return;	531	return;
366	}	532	}
367	}	533	}
368		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
369	/*****************************************************************************/	550	/*****************************************************************************/
370		551
371	static struct ev_timer **timers;
372	static int timermax, timercnt;
373
374	static struct ev_periodic **periodics;
375	static int periodicmax, periodiccnt;
376
377	static void	552	static void
378	upheap (WT *timers, int k)	553	upheap (WT *heap, int k)
379	{	554	{
380	WT w = timers [k];	555	WT w = heap [k];
381		556
382	while (k && timers [k >> 1]->at > w->at)	557	while (k && heap [k >> 1]->at > w->at)
383	{	558	{
384	timers [k] = timers [k >> 1];	559	heap [k] = heap [k >> 1];
385	timers [k]->active = k + 1;	560	((W)heap [k])->active = k + 1;
386	k >>= 1;	561	k >>= 1;
387	}	562	}
388		563
389	timers [k] = w;	564	heap [k] = w;
390	timers [k]->active = k + 1;	565	((W)heap [k])->active = k + 1;
391		566
392	}	567	}
393		568
394	static void	569	static void
395	downheap (WT *timers, int N, int k)	570	downheap (WT *heap, int N, int k)
396	{	571	{
397	WT w = timers [k];	572	WT w = heap [k];
398		573
399	while (k < (N >> 1))	574	while (k < (N >> 1))
400	{	575	{
401	int j = k << 1;	576	int j = k << 1;
402		577
403	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	578	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
404	++j;	579	++j;
405		580
406	if (w->at <= timers [j]->at)	581	if (w->at <= heap [j]->at)
407	break;	582	break;
408		583
409	timers [k] = timers [j];	584	heap [k] = heap [j];
410	timers [k]->active = k + 1;	585	((W)heap [k])->active = k + 1;
411	k = j;	586	k = j;
412	}	587	}
413		588
414	timers [k] = w;	589	heap [k] = w;
415	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);
416	}	598	}
417		599
418	/*****************************************************************************/	600	/*****************************************************************************/
419		601
420	typedef struct	602	typedef struct
421	{	603	{
422	struct ev_watcher_list *head;	604	WL head;
423	sig_atomic_t volatile gotsig;	605	sig_atomic_t volatile gotsig;
424	} ANSIG;	606	} ANSIG;
425		607
426	static ANSIG *signals;	608	static ANSIG *signals;
427	static int signalmax;	609	static int signalmax;
428		610
429	static int sigpipe [2];	611	static int sigpipe [2];
430	static sig_atomic_t volatile gotsig;	612	static sig_atomic_t volatile gotsig;
431	static struct ev_io sigev;	613	static ev_io sigev;
432		614
433	static void	615	static void
434	signals_init (ANSIG *base, int count)	616	signals_init (ANSIG *base, int count)
435	{	617	{
436	while (count--)	618	while (count--)
…		…
443	}	625	}
444		626
445	static void	627	static void
446	sighandler (int signum)	628	sighandler (int signum)
447	{	629	{
		630	#if _WIN32
		631	signal (signum, sighandler);
		632	#endif
		633
448	signals [signum - 1].gotsig = 1;	634	signals [signum - 1].gotsig = 1;
449		635
450	if (!gotsig)	636	if (!gotsig)
451	{	637	{
452	int old_errno = errno;	638	int old_errno = errno;
…		…
454	write (sigpipe [1], &signum, 1);	640	write (sigpipe [1], &signum, 1);
455	errno = old_errno;	641	errno = old_errno;
456	}	642	}
457	}	643	}
458		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
459	static void	665	static void
460	sigcb (EV_P_ struct ev_io *iow, int revents)	666	sigcb (EV_P_ ev_io *iow, int revents)
461	{	667	{
462	struct ev_watcher_list *w;
463	int signum;	668	int signum;
464		669
465	read (sigpipe [0], &revents, 1);	670	read (sigpipe [0], &revents, 1);
466	gotsig = 0;	671	gotsig = 0;
467		672
468	for (signum = signalmax; signum--; )	673	for (signum = signalmax; signum--; )
469	if (signals [signum].gotsig)	674	if (signals [signum].gotsig)
470	{	675	ev_feed_signal_event (EV_A_ signum + 1);
471	signals [signum].gotsig = 0;	676	}
472		677
473	for (w = signals [signum].head; w; w = w->next)	678	static void
474	event (EV_A_ (W)w, EV_SIGNAL);	679	fd_intern (int fd)
475	}	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
476	}	688	}
477		689
478	static void	690	static void
479	siginit (EV_P)	691	siginit (EV_P)
480	{	692	{
481	#ifndef WIN32	693	fd_intern (sigpipe [0]);
482	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	694	fd_intern (sigpipe [1]);
483	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
484
485	/* rather than sort out wether we really need nb, set it */
486	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
487	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
488	#endif
489		695
490	ev_io_set (&sigev, sigpipe [0], EV_READ);	696	ev_io_set (&sigev, sigpipe [0], EV_READ);
491	ev_io_start (&sigev);	697	ev_io_start (EV_A_ &sigev);
492	ev_unref (EV_A); /* child watcher should not keep loop alive */	698	ev_unref (EV_A); /* child watcher should not keep loop alive */
493	}	699	}
494		700
495	/*****************************************************************************/	701	/*****************************************************************************/
496		702
497	static struct ev_idle **idles;
498	static int idlemax, idlecnt;
499
500	static struct ev_prepare **prepares;
501	static int preparemax, preparecnt;
502
503	static struct ev_check **checks;
504	static int checkmax, checkcnt;
505
506	/*****************************************************************************/
507
508	static struct ev_child *childs [PID_HASHSIZE];	703	static ev_child *childs [PID_HASHSIZE];
509	static struct ev_signal childev;
510		704
511	#ifndef WIN32	705	#ifndef _WIN32
		706
		707	static ev_signal childev;
512		708
513	#ifndef WCONTINUED	709	#ifndef WCONTINUED
514	# define WCONTINUED 0	710	# define WCONTINUED 0
515	#endif	711	#endif
516		712
517	static void	713	static void
518	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)
519	{	715	{
520	struct ev_child *w;	716	ev_child *w;
521		717
522	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)
523	if (w->pid == pid \|\| !w->pid)	719	if (w->pid == pid \|\| !w->pid)
524	{	720	{
525	w->priority = sw->priority; /* need to do it now */	721	ev_priority (w) = ev_priority (sw); /* need to do it now */
526	w->rpid = pid;	722	w->rpid = pid;
527	w->rstatus = status;	723	w->rstatus = status;
528	event (EV_A_ (W)w, EV_CHILD);	724	ev_feed_event (EV_A_ (W)w, EV_CHILD);
529	}	725	}
530	}	726	}
531		727
532	static void	728	static void
533	childcb (EV_P_ struct ev_signal *sw, int revents)	729	childcb (EV_P_ ev_signal *sw, int revents)
534	{	730	{
535	int pid, status;	731	int pid, status;
536		732
537	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))	733	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
538	{	734	{
539	/* 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 */
540	event (EV_A_ (W)sw, EV_SIGNAL);	737	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
541		738
542	child_reap (EV_A_ sw, pid, pid, status);	739	child_reap (EV_A_ sw, pid, pid, status);
543	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 */
544	}	741	}
545	}	742	}
546		743
547	#endif	744	#endif
548		745
549	/*****************************************************************************/	746	/*****************************************************************************/
550		747
		748	#if EV_USE_PORT
		749	# include "ev_port.c"
		750	#endif
551	#if EV_USE_KQUEUE	751	#if EV_USE_KQUEUE
552	# include "ev_kqueue.c"	752	# include "ev_kqueue.c"
553	#endif	753	#endif
554	#if EV_USE_EPOLL	754	#if EV_USE_EPOLL
555	# include "ev_epoll.c"	755	# include "ev_epoll.c"
556	#endif	756	#endif
557	#if EV_USEV_POLL	757	#if EV_USE_POLL
558	# include "ev_poll.c"	758	# include "ev_poll.c"
559	#endif	759	#endif
560	#if EV_USE_SELECT	760	#if EV_USE_SELECT
561	# include "ev_select.c"	761	# include "ev_select.c"
562	#endif	762	#endif
…		…
575		775
576	/* 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 */
577	static int	777	static int
578	enable_secure (void)	778	enable_secure (void)
579	{	779	{
580	#ifdef WIN32	780	#ifdef _WIN32
581	return 0;	781	return 0;
582	#else	782	#else
583	return getuid () != geteuid ()	783	return getuid () != geteuid ()
584	\|\| getgid () != getegid ();	784	\|\| getgid () != getegid ();
585	#endif	785	#endif
586	}	786	}
587		787
588	int	788	unsigned int
589	ev_method (EV_P)	789	ev_supported_backends (void)
590	{	790	{
591	return method;	791	unsigned int flags = 0;
592	}
593		792
594	int	793	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
595	ev_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)
596	{	804	{
597	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)
598	{	838	{
599	#if EV_USE_MONOTONIC	839	#if EV_USE_MONOTONIC
600	{	840	{
601	struct timespec ts;	841	struct timespec ts;
602	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	842	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
603	have_monotonic = 1;	843	have_monotonic = 1;
604	}	844	}
605	#endif	845	#endif
606		846
607	rt_now = ev_time ();	847	ev_rt_now = ev_time ();
608	mn_now = get_clock ();	848	mn_now = get_clock ();
609	now_floor = mn_now;	849	now_floor = mn_now;
610	diff = rt_now - mn_now;	850	rtmn_diff = ev_rt_now - mn_now;
611		851
612	if (pipe (sigpipe))	852	if (!(flags & EVFLAG_NOENV)
613	return 0;	853	&& !enable_secure ()
		854	&& getenv ("LIBEV_FLAGS"))
		855	flags = atoi (getenv ("LIBEV_FLAGS"));
614		856
615	if (methods == EVMETHOD_AUTO)	857	if (!(flags & 0x0000ffffUL))
616	if (!enable_secure () && getenv ("LIBmethodS"))	858	flags \|= ev_recommended_backends ();
617	methods = atoi (getenv ("LIBmethodS"));
618	else
619	methods = EVMETHOD_ANY;
620		859
621	method = 0;	860	backend = 0;
		861	#if EV_USE_PORT
		862	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		863	#endif
622	#if EV_USE_KQUEUE	864	#if EV_USE_KQUEUE
623	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);	865	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
624	#endif	866	#endif
625	#if EV_USE_EPOLL	867	#if EV_USE_EPOLL
626	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);	868	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
627	#endif	869	#endif
628	#if EV_USEV_POLL	870	#if EV_USE_POLL
629	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);	871	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
630	#endif	872	#endif
631	#if EV_USE_SELECT	873	#if EV_USE_SELECT
632	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);	874	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
633	#endif	875	#endif
634		876
635	if (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))
636	{	1004	{
637	ev_watcher_init (&sigev, sigcb);
638	ev_set_priority (&sigev, EV_MAXPRI);
639	siginit (EV_A);	1005	siginit (EV_A);
640		1006
641	#ifndef WIN32	1007	#ifndef _WIN32
642	ev_signal_init (&childev, childcb, SIGCHLD);	1008	ev_signal_init (&childev, childcb, SIGCHLD);
643	ev_set_priority (&childev, EV_MAXPRI);	1009	ev_set_priority (&childev, EV_MAXPRI);
644	ev_signal_start (EV_A_ &childev);	1010	ev_signal_start (EV_A_ &childev);
645	ev_unref (EV_A); /* child watcher should not keep loop alive */	1011	ev_unref (EV_A); /* child watcher should not keep loop alive */
646	#endif	1012	#endif
647	}	1013	}
		1014	else
		1015	ev_default_loop_ptr = 0;
648	}	1016	}
649		1017
650	return 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;
651	}	1051	}
652		1052
653	/*****************************************************************************/	1053	/*****************************************************************************/
654		1054
655	void
656	ev_fork_prepare (void)
657	{
658	/* nop */
659	}
660
661	void
662	ev_fork_parent (void)
663	{
664	/* nop */
665	}
666
667	void
668	ev_fork_child (void)
669	{
670	#if EV_USE_EPOLL
671	if (method == EVMETHOD_EPOLL)
672	epoll_postfork_child ();
673	#endif
674
675	ev_io_stop (&sigev);
676	close (sigpipe [0]);
677	close (sigpipe [1]);
678	pipe (sigpipe);
679	siginit ();
680	}
681
682	/*****************************************************************************/
683
684	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
685	call_pending (EV_P)	1068	call_pending (EV_P)
686	{	1069	{
687	int pri;	1070	int pri;
688		1071
689	for (pri = NUMPRI; pri--; )	1072	for (pri = NUMPRI; pri--; )
690	while (pendingcnt [pri])	1073	while (pendingcnt [pri])
691	{	1074	{
692	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1075	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
693		1076
694	if (p->w)	1077	if (expect_true (p->w))
695	{	1078	{
696	p->w->pending = 0;	1079	p->w->pending = 0;
697	p->w->cb (EV_A_ p->w, p->events);	1080	EV_CB_INVOKE (p->w, p->events);
698	}	1081	}
699	}	1082	}
700	}	1083	}
701		1084
702	static void	1085	inline void
703	timers_reify (EV_P)	1086	timers_reify (EV_P)
704	{	1087	{
705	while (timercnt && timers [0]->at <= mn_now)	1088	while (timercnt && ((WT)timers [0])->at <= mn_now)
706	{	1089	{
707	struct ev_timer *w = timers [0];	1090	ev_timer *w = timers [0];
		1091
		1092	assert (("inactive timer on timer heap detected", ev_is_active (w)));
708		1093
709	/* first reschedule or stop timer */	1094	/* first reschedule or stop timer */
710	if (w->repeat)	1095	if (w->repeat)
711	{	1096	{
712	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1097	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1098
713	w->at = mn_now + w->repeat;	1099	((WT)w)->at += w->repeat;
		1100	if (((WT)w)->at < mn_now)
		1101	((WT)w)->at = mn_now;
		1102
714	downheap ((WT *)timers, timercnt, 0);	1103	downheap ((WT *)timers, timercnt, 0);
715	}	1104	}
716	else	1105	else
717	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1106	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
718		1107
719	event ((W)w, EV_TIMEOUT);	1108	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
720	}	1109	}
721	}	1110	}
722		1111
723	static void	1112	#if EV_PERIODICS
		1113	inline void
724	periodics_reify (EV_P)	1114	periodics_reify (EV_P)
725	{	1115	{
726	while (periodiccnt && periodics [0]->at <= rt_now)	1116	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
727	{	1117	{
728	struct ev_periodic *w = periodics [0];	1118	ev_periodic *w = periodics [0];
		1119
		1120	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
729		1121
730	/* first reschedule or stop timer */	1122	/* first reschedule or stop timer */
731	if (w->interval)	1123	if (w->reschedule_cb)
732	{	1124	{
		1125	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1126	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1127	downheap ((WT *)periodics, periodiccnt, 0);
		1128	}
		1129	else if (w->interval)
		1130	{
733	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;	1131	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
734	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));	1132	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
735	downheap ((WT *)periodics, periodiccnt, 0);	1133	downheap ((WT *)periodics, periodiccnt, 0);
736	}	1134	}
737	else	1135	else
738	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1136	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
739		1137
740	event (EV_A_ (W)w, EV_PERIODIC);	1138	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
741	}	1139	}
742	}	1140	}
743		1141
744	static void	1142	static void
745	periodics_reschedule (EV_P_ ev_tstamp diff)	1143	periodics_reschedule (EV_P)
746	{	1144	{
747	int i;	1145	int i;
748		1146
749	/* adjust periodics after time jump */	1147	/* adjust periodics after time jump */
750	for (i = 0; i < periodiccnt; ++i)	1148	for (i = 0; i < periodiccnt; ++i)
751	{	1149	{
752	struct ev_periodic *w = periodics [i];	1150	ev_periodic *w = periodics [i];
753		1151
		1152	if (w->reschedule_cb)
		1153	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
754	if (w->interval)	1154	else if (w->interval)
755	{
756	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;	1155	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
757
758	if (fabs (diff) >= 1e-4)
759	{
760	ev_periodic_stop (EV_A_ w);
761	ev_periodic_start (EV_A_ w);
762
763	i = 0; /* restart loop, inefficient, but time jumps should be rare */
764	}
765	}
766	}	1156	}
		1157
		1158	/* now rebuild the heap */
		1159	for (i = periodiccnt >> 1; i--; )
		1160	downheap ((WT *)periodics, periodiccnt, i);
767	}	1161	}
		1162	#endif
768		1163
769	inline int	1164	inline int
770	time_update_monotonic (EV_P)	1165	time_update_monotonic (EV_P)
771	{	1166	{
772	mn_now = get_clock ();	1167	mn_now = get_clock ();
773		1168
774	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1169	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
775	{	1170	{
776	rt_now = mn_now + diff;	1171	ev_rt_now = rtmn_diff + mn_now;
777	return 0;	1172	return 0;
778	}	1173	}
779	else	1174	else
780	{	1175	{
781	now_floor = mn_now;	1176	now_floor = mn_now;
782	rt_now = ev_time ();	1177	ev_rt_now = ev_time ();
783	return 1;	1178	return 1;
784	}	1179	}
785	}	1180	}
786		1181
787	static void	1182	inline void
788	time_update (EV_P)	1183	time_update (EV_P)
789	{	1184	{
790	int i;	1185	int i;
791		1186
792	#if EV_USE_MONOTONIC	1187	#if EV_USE_MONOTONIC
793	if (expect_true (have_monotonic))	1188	if (expect_true (have_monotonic))
794	{	1189	{
795	if (time_update_monotonic (EV_A))	1190	if (time_update_monotonic (EV_A))
796	{	1191	{
797	ev_tstamp odiff = diff;	1192	ev_tstamp odiff = rtmn_diff;
798		1193
799	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1194	for (i = 4; --i; ) /* loop a few times, before making important decisions */
800	{	1195	{
801	diff = rt_now - mn_now;	1196	rtmn_diff = ev_rt_now - mn_now;
802		1197
803	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1198	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
804	return; /* all is well */	1199	return; /* all is well */
805		1200
806	rt_now = ev_time ();	1201	ev_rt_now = ev_time ();
807	mn_now = get_clock ();	1202	mn_now = get_clock ();
808	now_floor = mn_now;	1203	now_floor = mn_now;
809	}	1204	}
810		1205
		1206	# if EV_PERIODICS
811	periodics_reschedule (EV_A_ diff - odiff);	1207	periodics_reschedule (EV_A);
		1208	# endif
812	/* no timer adjustment, as the monotonic clock doesn't jump */	1209	/* no timer adjustment, as the monotonic clock doesn't jump */
		1210	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
813	}	1211	}
814	}	1212	}
815	else	1213	else
816	#endif	1214	#endif
817	{	1215	{
818	rt_now = ev_time ();	1216	ev_rt_now = ev_time ();
819		1217
820	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1218	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
821	{	1219	{
		1220	#if EV_PERIODICS
822	periodics_reschedule (EV_A_ rt_now - mn_now);	1221	periodics_reschedule (EV_A);
		1222	#endif
823		1223
824	/* adjust timers. this is easy, as the offset is the same for all */	1224	/* adjust timers. this is easy, as the offset is the same for all */
825	for (i = 0; i < timercnt; ++i)	1225	for (i = 0; i < timercnt; ++i)
826	timers [i]->at += diff;	1226	((WT)timers [i])->at += ev_rt_now - mn_now;
827	}	1227	}
828		1228
829	mn_now = rt_now;	1229	mn_now = ev_rt_now;
830	}	1230	}
831	}	1231	}
832		1232
833	void	1233	void
834	ev_ref (EV_P)	1234	ev_ref (EV_P)
…		…
845	static int loop_done;	1245	static int loop_done;
846		1246
847	void	1247	void
848	ev_loop (EV_P_ int flags)	1248	ev_loop (EV_P_ int flags)
849	{	1249	{
850	double block;
851	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	1250	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)
		1251	? EVUNLOOP_ONE
		1252	: EVUNLOOP_CANCEL;
852		1253
853	do	1254	while (activecnt)
854	{	1255	{
855	/* queue check watchers (and execute them) */	1256	/* queue check watchers (and execute them) */
856	if (expect_false (preparecnt))	1257	if (expect_false (preparecnt))
857	{	1258	{
858	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1259	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
859	call_pending (EV_A);	1260	call_pending (EV_A);
860	}	1261	}
861		1262
		1263	/* we might have forked, so reify kernel state if necessary */
		1264	if (expect_false (postfork))
		1265	loop_fork (EV_A);
		1266
862	/* update fd-related kernel structures */	1267	/* update fd-related kernel structures */
863	fd_reify (EV_A);	1268	fd_reify (EV_A);
864		1269
865	/* calculate blocking time */	1270	/* calculate blocking time */
		1271	{
		1272	double block;
866		1273
867	/* we only need this for !monotonic clockor timers, but as we basically	1274	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
868	always have timers, we just calculate it always */	1275	block = 0.; /* do not block at all */
		1276	else
		1277	{
		1278	/* update time to cancel out callback processing overhead */
869	#if EV_USE_MONOTONIC	1279	#if EV_USE_MONOTONIC
870	if (expect_true (have_monotonic))	1280	if (expect_true (have_monotonic))
871	time_update_monotonic (EV_A);	1281	time_update_monotonic (EV_A);
872	else	1282	else
873	#endif	1283	#endif
874	{	1284	{
875	rt_now = ev_time ();	1285	ev_rt_now = ev_time ();
876	mn_now = rt_now;	1286	mn_now = ev_rt_now;
877	}	1287	}
878		1288
879	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
880	block = 0.;
881	else
882	{
883	block = MAX_BLOCKTIME;	1289	block = MAX_BLOCKTIME;
884		1290
885	if (timercnt)	1291	if (timercnt)
886	{	1292	{
887	ev_tstamp to = timers [0]->at - mn_now + method_fudge;	1293	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
888	if (block > to) block = to;	1294	if (block > to) block = to;
889	}	1295	}
890		1296
		1297	#if EV_PERIODICS
891	if (periodiccnt)	1298	if (periodiccnt)
892	{	1299	{
893	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;	1300	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
894	if (block > to) block = to;	1301	if (block > to) block = to;
895	}	1302	}
		1303	#endif
896		1304
897	if (block < 0.) block = 0.;	1305	if (expect_false (block < 0.)) block = 0.;
898	}	1306	}
899		1307
900	method_poll (EV_A_ block);	1308	backend_poll (EV_A_ block);
		1309	}
901		1310
902	/* update rt_now, do magic */	1311	/* update ev_rt_now, do magic */
903	time_update (EV_A);	1312	time_update (EV_A);
904		1313
905	/* queue pending timers and reschedule them */	1314	/* queue pending timers and reschedule them */
906	timers_reify (EV_A); /* relative timers called last */	1315	timers_reify (EV_A); /* relative timers called last */
		1316	#if EV_PERIODICS
907	periodics_reify (EV_A); /* absolute timers called first */	1317	periodics_reify (EV_A); /* absolute timers called first */
		1318	#endif
908		1319
909	/* queue idle watchers unless io or timers are pending */	1320	/* queue idle watchers unless io or timers are pending */
910	if (!pendingcnt)	1321	if (idlecnt && !any_pending (EV_A))
911	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	1322	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
912		1323
913	/* queue check watchers, to be executed first */	1324	/* queue check watchers, to be executed first */
914	if (checkcnt)	1325	if (expect_false (checkcnt))
915	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1326	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
916		1327
917	call_pending (EV_A);	1328	call_pending (EV_A);
918	}
919	while (activecnt && !loop_done);
920		1329
921	if (loop_done != 2)	1330	if (expect_false (loop_done))
922	loop_done = 0;	1331	break;
		1332	}
		1333
		1334	if (loop_done == EVUNLOOP_ONE)
		1335	loop_done = EVUNLOOP_CANCEL;
923	}	1336	}
924		1337
925	void	1338	void
926	ev_unloop (EV_P_ int how)	1339	ev_unloop (EV_P_ int how)
927	{	1340	{
…		…
980	}	1393	}
981		1394
982	/*****************************************************************************/	1395	/*****************************************************************************/
983		1396
984	void	1397	void
985	ev_io_start (EV_P_ struct ev_io *w)	1398	ev_io_start (EV_P_ ev_io *w)
986	{	1399	{
987	int fd = w->fd;	1400	int fd = w->fd;
988		1401
989	if (ev_is_active (w))	1402	if (expect_false (ev_is_active (w)))
990	return;	1403	return;
991		1404
992	assert (("ev_io_start called with negative fd", fd >= 0));	1405	assert (("ev_io_start called with negative fd", fd >= 0));
993		1406
994	ev_start (EV_A_ (W)w, 1);	1407	ev_start (EV_A_ (W)w, 1);
995	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1408	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
996	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1409	wlist_add ((WL *)&anfds[fd].head, (WL)w);
997		1410
998	fd_change (EV_A_ fd);	1411	fd_change (EV_A_ fd);
999	}	1412	}
1000		1413
1001	void	1414	void
1002	ev_io_stop (EV_P_ struct ev_io *w)	1415	ev_io_stop (EV_P_ ev_io *w)
1003	{	1416	{
1004	ev_clear_pending (EV_A_ (W)w);	1417	ev_clear_pending (EV_A_ (W)w);
1005	if (!ev_is_active (w))	1418	if (expect_false (!ev_is_active (w)))
1006	return;	1419	return;
		1420
		1421	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1007		1422
1008	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1423	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
1009	ev_stop (EV_A_ (W)w);	1424	ev_stop (EV_A_ (W)w);
1010		1425
1011	fd_change (EV_A_ w->fd);	1426	fd_change (EV_A_ w->fd);
1012	}	1427	}
1013		1428
1014	void	1429	void
1015	ev_timer_start (EV_P_ struct ev_timer *w)	1430	ev_timer_start (EV_P_ ev_timer *w)
1016	{	1431	{
1017	if (ev_is_active (w))	1432	if (expect_false (ev_is_active (w)))
1018	return;	1433	return;
1019		1434
1020	w->at += mn_now;	1435	((WT)w)->at += mn_now;
1021		1436
1022	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1437	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1023		1438
1024	ev_start (EV_A_ (W)w, ++timercnt);	1439	ev_start (EV_A_ (W)w, ++timercnt);
1025	array_needsize (timers, timermax, timercnt, );	1440	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
1026	timers [timercnt - 1] = w;	1441	timers [timercnt - 1] = w;
1027	upheap ((WT *)timers, timercnt - 1);	1442	upheap ((WT *)timers, timercnt - 1);
1028	}
1029		1443
		1444	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1445	}
		1446
1030	void	1447	void
1031	ev_timer_stop (EV_P_ struct ev_timer *w)	1448	ev_timer_stop (EV_P_ ev_timer *w)
1032	{	1449	{
1033	ev_clear_pending (EV_A_ (W)w);	1450	ev_clear_pending (EV_A_ (W)w);
1034	if (!ev_is_active (w))	1451	if (expect_false (!ev_is_active (w)))
1035	return;	1452	return;
1036		1453
		1454	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1455
1037	if (w->active < timercnt--)	1456	if (expect_true (((W)w)->active < timercnt--))
1038	{	1457	{
1039	timers [w->active - 1] = timers [timercnt];	1458	timers [((W)w)->active - 1] = timers [timercnt];
1040	downheap ((WT *)timers, timercnt, w->active - 1);	1459	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1041	}	1460	}
1042		1461
1043	w->at = w->repeat;	1462	((WT)w)->at -= mn_now;
1044		1463
1045	ev_stop (EV_A_ (W)w);	1464	ev_stop (EV_A_ (W)w);
1046	}	1465	}
1047		1466
1048	void	1467	void
1049	ev_timer_again (EV_P_ struct ev_timer *w)	1468	ev_timer_again (EV_P_ ev_timer *w)
1050	{	1469	{
1051	if (ev_is_active (w))	1470	if (ev_is_active (w))
1052	{	1471	{
1053	if (w->repeat)	1472	if (w->repeat)
1054	{	1473	{
1055	w->at = mn_now + w->repeat;	1474	((WT)w)->at = mn_now + w->repeat;
1056	downheap ((WT *)timers, timercnt, w->active - 1);	1475	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1057	}	1476	}
1058	else	1477	else
1059	ev_timer_stop (EV_A_ w);	1478	ev_timer_stop (EV_A_ w);
1060	}	1479	}
1061	else if (w->repeat)	1480	else if (w->repeat)
		1481	{
		1482	w->at = w->repeat;
1062	ev_timer_start (EV_A_ w);	1483	ev_timer_start (EV_A_ w);
		1484	}
1063	}	1485	}
1064		1486
		1487	#if EV_PERIODICS
1065	void	1488	void
1066	ev_periodic_start (EV_P_ struct ev_periodic *w)	1489	ev_periodic_start (EV_P_ ev_periodic *w)
1067	{	1490	{
1068	if (ev_is_active (w))	1491	if (expect_false (ev_is_active (w)))
1069	return;	1492	return;
1070		1493
		1494	if (w->reschedule_cb)
		1495	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1496	else if (w->interval)
		1497	{
1071	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1498	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1072
1073	/* this formula differs from the one in periodic_reify because we do not always round up */	1499	/* this formula differs from the one in periodic_reify because we do not always round up */
1074	if (w->interval)
1075	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;	1500	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1501	}
1076		1502
1077	ev_start (EV_A_ (W)w, ++periodiccnt);	1503	ev_start (EV_A_ (W)w, ++periodiccnt);
1078	array_needsize (periodics, periodicmax, periodiccnt, );	1504	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
1079	periodics [periodiccnt - 1] = w;	1505	periodics [periodiccnt - 1] = w;
1080	upheap ((WT *)periodics, periodiccnt - 1);	1506	upheap ((WT *)periodics, periodiccnt - 1);
1081	}
1082		1507
		1508	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1509	}
		1510
1083	void	1511	void
1084	ev_periodic_stop (EV_P_ struct ev_periodic *w)	1512	ev_periodic_stop (EV_P_ ev_periodic *w)
1085	{	1513	{
1086	ev_clear_pending (EV_A_ (W)w);	1514	ev_clear_pending (EV_A_ (W)w);
1087	if (!ev_is_active (w))	1515	if (expect_false (!ev_is_active (w)))
1088	return;	1516	return;
1089		1517
		1518	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1519
1090	if (w->active < periodiccnt--)	1520	if (expect_true (((W)w)->active < periodiccnt--))
1091	{	1521	{
1092	periodics [w->active - 1] = periodics [periodiccnt];	1522	periodics [((W)w)->active - 1] = periodics [periodiccnt];
1093	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1523	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
1094	}	1524	}
1095		1525
		1526	ev_stop (EV_A_ (W)w);
		1527	}
		1528
		1529	void
		1530	ev_periodic_again (EV_P_ ev_periodic *w)
		1531	{
		1532	/* TODO: use adjustheap and recalculation */
		1533	ev_periodic_stop (EV_A_ w);
		1534	ev_periodic_start (EV_A_ w);
		1535	}
		1536	#endif
		1537
		1538	void
		1539	ev_idle_start (EV_P_ ev_idle *w)
		1540	{
		1541	if (expect_false (ev_is_active (w)))
		1542	return;
		1543
		1544	ev_start (EV_A_ (W)w, ++idlecnt);
		1545	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1546	idles [idlecnt - 1] = w;
		1547	}
		1548
		1549	void
		1550	ev_idle_stop (EV_P_ ev_idle *w)
		1551	{
		1552	ev_clear_pending (EV_A_ (W)w);
		1553	if (expect_false (!ev_is_active (w)))
		1554	return;
		1555
		1556	idles [((W)w)->active - 1] = idles [--idlecnt];
		1557	ev_stop (EV_A_ (W)w);
		1558	}
		1559
		1560	void
		1561	ev_prepare_start (EV_P_ ev_prepare *w)
		1562	{
		1563	if (expect_false (ev_is_active (w)))
		1564	return;
		1565
		1566	ev_start (EV_A_ (W)w, ++preparecnt);
		1567	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1568	prepares [preparecnt - 1] = w;
		1569	}
		1570
		1571	void
		1572	ev_prepare_stop (EV_P_ ev_prepare *w)
		1573	{
		1574	ev_clear_pending (EV_A_ (W)w);
		1575	if (expect_false (!ev_is_active (w)))
		1576	return;
		1577
		1578	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1579	ev_stop (EV_A_ (W)w);
		1580	}
		1581
		1582	void
		1583	ev_check_start (EV_P_ ev_check *w)
		1584	{
		1585	if (expect_false (ev_is_active (w)))
		1586	return;
		1587
		1588	ev_start (EV_A_ (W)w, ++checkcnt);
		1589	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1590	checks [checkcnt - 1] = w;
		1591	}
		1592
		1593	void
		1594	ev_check_stop (EV_P_ ev_check *w)
		1595	{
		1596	ev_clear_pending (EV_A_ (W)w);
		1597	if (expect_false (!ev_is_active (w)))
		1598	return;
		1599
		1600	checks [((W)w)->active - 1] = checks [--checkcnt];
1096	ev_stop (EV_A_ (W)w);	1601	ev_stop (EV_A_ (W)w);
1097	}	1602	}
1098		1603
1099	#ifndef SA_RESTART	1604	#ifndef SA_RESTART
1100	# define SA_RESTART 0	1605	# define SA_RESTART 0
1101	#endif	1606	#endif
1102		1607
1103	void	1608	void
1104	ev_signal_start (EV_P_ struct ev_signal *w)	1609	ev_signal_start (EV_P_ ev_signal *w)
1105	{	1610	{
		1611	#if EV_MULTIPLICITY
		1612	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1613	#endif
1106	if (ev_is_active (w))	1614	if (expect_false (ev_is_active (w)))
1107	return;	1615	return;
1108		1616
1109	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1617	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1110		1618
1111	ev_start (EV_A_ (W)w, 1);	1619	ev_start (EV_A_ (W)w, 1);
1112	array_needsize (signals, signalmax, w->signum, signals_init);	1620	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1113	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1621	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1114		1622
1115	if (!w->next)	1623	if (!((WL)w)->next)
1116	{	1624	{
		1625	#if _WIN32
		1626	signal (w->signum, sighandler);
		1627	#else
1117	struct sigaction sa;	1628	struct sigaction sa;
1118	sa.sa_handler = sighandler;	1629	sa.sa_handler = sighandler;
1119	sigfillset (&sa.sa_mask);	1630	sigfillset (&sa.sa_mask);
1120	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	1631	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1121	sigaction (w->signum, &sa, 0);	1632	sigaction (w->signum, &sa, 0);
		1633	#endif
1122	}	1634	}
1123	}	1635	}
1124		1636
1125	void	1637	void
1126	ev_signal_stop (EV_P_ struct ev_signal *w)	1638	ev_signal_stop (EV_P_ ev_signal *w)
1127	{	1639	{
1128	ev_clear_pending (EV_A_ (W)w);	1640	ev_clear_pending (EV_A_ (W)w);
1129	if (!ev_is_active (w))	1641	if (expect_false (!ev_is_active (w)))
1130	return;	1642	return;
1131		1643
1132	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1644	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1133	ev_stop (EV_A_ (W)w);	1645	ev_stop (EV_A_ (W)w);
1134		1646
1135	if (!signals [w->signum - 1].head)	1647	if (!signals [w->signum - 1].head)
1136	signal (w->signum, SIG_DFL);	1648	signal (w->signum, SIG_DFL);
1137	}	1649	}
1138		1650
1139	void	1651	void
1140	ev_idle_start (EV_P_ struct ev_idle *w)
1141	{
1142	if (ev_is_active (w))
1143	return;
1144
1145	ev_start (EV_A_ (W)w, ++idlecnt);
1146	array_needsize (idles, idlemax, idlecnt, );
1147	idles [idlecnt - 1] = w;
1148	}
1149
1150	void
1151	ev_idle_stop (EV_P_ struct ev_idle *w)
1152	{
1153	ev_clear_pending (EV_A_ (W)w);
1154	if (ev_is_active (w))
1155	return;
1156
1157	idles [w->active - 1] = idles [--idlecnt];
1158	ev_stop (EV_A_ (W)w);
1159	}
1160
1161	void
1162	ev_prepare_start (EV_P_ struct ev_prepare *w)
1163	{
1164	if (ev_is_active (w))
1165	return;
1166
1167	ev_start (EV_A_ (W)w, ++preparecnt);
1168	array_needsize (prepares, preparemax, preparecnt, );
1169	prepares [preparecnt - 1] = w;
1170	}
1171
1172	void
1173	ev_prepare_stop (EV_P_ struct ev_prepare *w)
1174	{
1175	ev_clear_pending (EV_A_ (W)w);
1176	if (ev_is_active (w))
1177	return;
1178
1179	prepares [w->active - 1] = prepares [--preparecnt];
1180	ev_stop (EV_A_ (W)w);
1181	}
1182
1183	void
1184	ev_check_start (EV_P_ struct ev_check *w)
1185	{
1186	if (ev_is_active (w))
1187	return;
1188
1189	ev_start (EV_A_ (W)w, ++checkcnt);
1190	array_needsize (checks, checkmax, checkcnt, );
1191	checks [checkcnt - 1] = w;
1192	}
1193
1194	void
1195	ev_check_stop (EV_P_ struct ev_check *w)
1196	{
1197	ev_clear_pending (EV_A_ (W)w);
1198	if (ev_is_active (w))
1199	return;
1200
1201	checks [w->active - 1] = checks [--checkcnt];
1202	ev_stop (EV_A_ (W)w);
1203	}
1204
1205	void
1206	ev_child_start (EV_P_ struct ev_child *w)	1652	ev_child_start (EV_P_ ev_child *w)
1207	{	1653	{
		1654	#if EV_MULTIPLICITY
		1655	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1656	#endif
1208	if (ev_is_active (w))	1657	if (expect_false (ev_is_active (w)))
1209	return;	1658	return;
1210		1659
1211	ev_start (EV_A_ (W)w, 1);	1660	ev_start (EV_A_ (W)w, 1);
1212	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1661	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1213	}	1662	}
1214		1663
1215	void	1664	void
1216	ev_child_stop (EV_P_ struct ev_child *w)	1665	ev_child_stop (EV_P_ ev_child *w)
1217	{	1666	{
1218	ev_clear_pending (EV_A_ (W)w);	1667	ev_clear_pending (EV_A_ (W)w);
1219	if (ev_is_active (w))	1668	if (expect_false (!ev_is_active (w)))
1220	return;	1669	return;
1221		1670
1222	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1671	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1223	ev_stop (EV_A_ (W)w);	1672	ev_stop (EV_A_ (W)w);
1224	}	1673	}
1225		1674
		1675	#if EV_MULTIPLICITY
		1676	void
		1677	ev_embed_loop (EV_P_ ev_embed *w)
		1678	{
		1679	ev_loop (w->loop, EVLOOP_NONBLOCK);
		1680	}
		1681
		1682	static void
		1683	embed_cb (EV_P_ ev_io *io, int revents)
		1684	{
		1685	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
		1686
		1687	if (ev_cb (w))
		1688	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		1689	else
		1690	ev_embed_loop (loop, w);
		1691	}
		1692
		1693	void
		1694	ev_embed_start (EV_P_ ev_embed *w)
		1695	{
		1696	if (expect_false (ev_is_active (w)))
		1697	return;
		1698
		1699	{
		1700	struct ev_loop *loop = w->loop;
		1701	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		1702	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		1703	}
		1704
		1705	ev_set_priority (&w->io, ev_priority (w));
		1706	ev_io_start (EV_A_ &w->io);
		1707	ev_start (EV_A_ (W)w, 1);
		1708	}
		1709
		1710	void
		1711	ev_embed_stop (EV_P_ ev_embed *w)
		1712	{
		1713	ev_clear_pending (EV_A_ (W)w);
		1714	if (expect_false (!ev_is_active (w)))
		1715	return;
		1716
		1717	ev_io_stop (EV_A_ &w->io);
		1718	ev_stop (EV_A_ (W)w);
		1719	}
		1720	#endif
		1721
1226	/*****************************************************************************/	1722	/*****************************************************************************/
1227		1723
1228	struct ev_once	1724	struct ev_once
1229	{	1725	{
1230	struct ev_io io;	1726	ev_io io;
1231	struct ev_timer to;	1727	ev_timer to;
1232	void (cb)(int revents, void arg);	1728	void (cb)(int revents, void arg);
1233	void *arg;	1729	void *arg;
1234	};	1730	};
1235		1731
1236	static void	1732	static void
…		…
1239	void (cb)(int revents, void arg) = once->cb;	1735	void (cb)(int revents, void arg) = once->cb;
1240	void *arg = once->arg;	1736	void *arg = once->arg;
1241		1737
1242	ev_io_stop (EV_A_ &once->io);	1738	ev_io_stop (EV_A_ &once->io);
1243	ev_timer_stop (EV_A_ &once->to);	1739	ev_timer_stop (EV_A_ &once->to);
1244	free (once);	1740	ev_free (once);
1245		1741
1246	cb (revents, arg);	1742	cb (revents, arg);
1247	}	1743	}
1248		1744
1249	static void	1745	static void
1250	once_cb_io (EV_P_ struct ev_io *w, int revents)	1746	once_cb_io (EV_P_ ev_io *w, int revents)
1251	{	1747	{
1252	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1748	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1253	}	1749	}
1254		1750
1255	static void	1751	static void
1256	once_cb_to (EV_P_ struct ev_timer *w, int revents)	1752	once_cb_to (EV_P_ ev_timer *w, int revents)
1257	{	1753	{
1258	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1754	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1259	}	1755	}
1260		1756
1261	void	1757	void
1262	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1758	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1263	{	1759	{
1264	struct ev_once *once = malloc (sizeof (struct ev_once));	1760	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
1265		1761
1266	if (!once)	1762	if (expect_false (!once))
		1763	{
1267	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1764	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1268	else	1765	return;
1269	{	1766	}
		1767
1270	once->cb = cb;	1768	once->cb = cb;
1271	once->arg = arg;	1769	once->arg = arg;
1272		1770
1273	ev_watcher_init (&once->io, once_cb_io);	1771	ev_init (&once->io, once_cb_io);
1274	if (fd >= 0)	1772	if (fd >= 0)
1275	{	1773	{
1276	ev_io_set (&once->io, fd, events);	1774	ev_io_set (&once->io, fd, events);
1277	ev_io_start (EV_A_ &once->io);	1775	ev_io_start (EV_A_ &once->io);
1278	}	1776	}
1279		1777
1280	ev_watcher_init (&once->to, once_cb_to);	1778	ev_init (&once->to, once_cb_to);
1281	if (timeout >= 0.)	1779	if (timeout >= 0.)
1282	{	1780	{
1283	ev_timer_set (&once->to, timeout, 0.);	1781	ev_timer_set (&once->to, timeout, 0.);
1284	ev_timer_start (EV_A_ &once->to);	1782	ev_timer_start (EV_A_ &once->to);
1285	}
1286	}
1287	}
1288
1289	/*****************************************************************************/
1290
1291	#if 0
1292
1293	struct ev_io wio;
1294
1295	static void
1296	sin_cb (struct ev_io *w, int revents)
1297	{
1298	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1299	}
1300
1301	static void
1302	ocb (struct ev_timer *w, int revents)
1303	{
1304	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1305	ev_timer_stop (w);
1306	ev_timer_start (w);
1307	}
1308
1309	static void
1310	scb (struct ev_signal *w, int revents)
1311	{
1312	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1313	ev_io_stop (&wio);
1314	ev_io_start (&wio);
1315	}
1316
1317	static void
1318	gcb (struct ev_signal *w, int revents)
1319	{
1320	fprintf (stderr, "generic %x\n", revents);
1321
1322	}
1323
1324	int main (void)
1325	{
1326	ev_init (0);
1327
1328	ev_io_init (&wio, sin_cb, 0, EV_READ);
1329	ev_io_start (&wio);
1330
1331	struct ev_timer t[10000];
1332
1333	#if 0
1334	int i;
1335	for (i = 0; i < 10000; ++i)
1336	{	1783	}
1337	struct ev_timer *w = t + i;
1338	ev_watcher_init (w, ocb, i);
1339	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1340	ev_timer_start (w);
1341	if (drand48 () < 0.5)
1342	ev_timer_stop (w);
1343	}
1344	#endif
1345
1346	struct ev_timer t1;
1347	ev_timer_init (&t1, ocb, 5, 10);
1348	ev_timer_start (&t1);
1349
1350	struct ev_signal sig;
1351	ev_signal_init (&sig, scb, SIGQUIT);
1352	ev_signal_start (&sig);
1353
1354	struct ev_check cw;
1355	ev_check_init (&cw, gcb);
1356	ev_check_start (&cw);
1357
1358	struct ev_idle iw;
1359	ev_idle_init (&iw, gcb);
1360	ev_idle_start (&iw);
1361
1362	ev_loop (0);
1363
1364	return 0;
1365	}	1784	}
1366		1785
		1786	#ifdef __cplusplus
		1787	}
1367	#endif	1788	#endif
1368		1789
1369
1370
1371

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Comparing libev/ev.c (file contents): Revision 1.52 by root, Sat Nov 3 22:10:39 2007 UTC vs. Revision 1.136 by root, Sat Nov 24 07:14:26 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.52 by root, Sat Nov 3 22:10:39 2007 UTC vs.
Revision 1.136 by root, Sat Nov 24 07:14:26 2007 UTC