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

Comparing libev/ev.c (file contents):
Revision 1.36 by root, Thu Nov 1 13:11:11 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
		36	#ifndef EV_STANDALONE
31	#if EV_USE_CONFIG_H	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>
47	#include <sys/wait.h>
48	#include <sys/time.h>
49	#include <time.h>	111	#include <time.h>
50		112
		113	#include <signal.h>
		114
		115	#ifndef _WIN32
		116	# include <unistd.h>
		117	# include <sys/time.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
		124	# endif
		125	#endif
		126
		127	/**/
		128
51	#ifndef EV_USE_MONOTONIC	129	#ifndef EV_USE_MONOTONIC
52	# ifdef CLOCK_MONOTONIC
53	# define EV_USE_MONOTONIC 1	130	# define EV_USE_MONOTONIC 0
54	# endif	131	#endif
		132
		133	#ifndef EV_USE_REALTIME
		134	# define EV_USE_REALTIME 0
55	#endif	135	#endif
56		136
57	#ifndef EV_USE_SELECT	137	#ifndef EV_USE_SELECT
58	# define EV_USE_SELECT 1	138	# define EV_USE_SELECT 1
59	#endif	139	#endif
60		140
		141	#ifndef EV_USE_POLL
		142	# ifdef _WIN32
		143	# define EV_USE_POLL 0
		144	# else
		145	# define EV_USE_POLL 1
		146	# endif
		147	#endif
		148
61	#ifndef EV_USE_EPOLL	149	#ifndef EV_USE_EPOLL
62	# define EV_USE_EPOLL 0	150	# define EV_USE_EPOLL 0
63	#endif	151	#endif
64		152
		153	#ifndef EV_USE_KQUEUE
		154	# define EV_USE_KQUEUE 0
		155	#endif
		156
		157	#ifndef EV_USE_PORT
		158	# define EV_USE_PORT 0
		159	#endif
		160
		161	/**/
		162
		163	#ifndef CLOCK_MONOTONIC
		164	# undef EV_USE_MONOTONIC
		165	# define EV_USE_MONOTONIC 0
		166	#endif
		167
65	#ifndef CLOCK_REALTIME	168	#ifndef CLOCK_REALTIME
		169	# undef EV_USE_REALTIME
66	# define EV_USE_REALTIME 0	170	# define EV_USE_REALTIME 0
67	#endif	171	#endif
68	#ifndef EV_USE_REALTIME	172
69	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
70	#endif	175	#endif
		176
		177	/**/
71		178
72	#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) */
73	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	180	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
74	#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 */
75	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* 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 */
76		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
77	#include "ev.h"	187	# include "ev.h"
		188	#endif
78		189
		190	#if __GNUC__ >= 3
		191	# define expect(expr,value) __builtin_expect ((expr),(value))
		192	# define inline static inline
		193	#else
		194	# define expect(expr,value) (expr)
		195	# define inline static
		196	#endif
		197
		198	#define expect_false(expr) expect ((expr) != 0, 0)
		199	#define expect_true(expr) expect ((expr) != 0, 1)
		200
		201	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		202	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		203
		204	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		205	#define EMPTY2(a,b) /* used to suppress some warnings */
		206
79	typedef struct ev_watcher *W;	207	typedef ev_watcher *W;
80	typedef struct ev_watcher_list *WL;	208	typedef ev_watcher_list *WL;
81	typedef struct ev_watcher_time *WT;	209	typedef ev_watcher_time *WT;
82		210
83	static ev_tstamp 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
84	ev_tstamp ev_now;	300	ev_tstamp ev_rt_now;
85	int ev_method;	301	#define VAR(name,decl) static decl;
		302	#include "ev_vars.h"
		303	#undef VAR
86		304
87	static int have_monotonic; /* runtime */	305	static int ev_default_loop_ptr;
88		306
89	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	307	#endif
90	static void (*method_modify)(int fd, int oev, int nev);
91	static void (*method_poll)(ev_tstamp timeout);
92		308
93	/*****************************************************************************/	309	/*****************************************************************************/
94		310
95	ev_tstamp	311	ev_tstamp
96	ev_time (void)	312	ev_time (void)
…		…
104	gettimeofday (&tv, 0);	320	gettimeofday (&tv, 0);
105	return tv.tv_sec + tv.tv_usec * 1e-6;	321	return tv.tv_sec + tv.tv_usec * 1e-6;
106	#endif	322	#endif
107	}	323	}
108		324
109	static ev_tstamp	325	inline ev_tstamp
110	get_clock (void)	326	get_clock (void)
111	{	327	{
112	#if EV_USE_MONOTONIC	328	#if EV_USE_MONOTONIC
113	if (have_monotonic)	329	if (expect_true (have_monotonic))
114	{	330	{
115	struct timespec ts;	331	struct timespec ts;
116	clock_gettime (CLOCK_MONOTONIC, &ts);	332	clock_gettime (CLOCK_MONOTONIC, &ts);
117	return ts.tv_sec + ts.tv_nsec * 1e-9;	333	return ts.tv_sec + ts.tv_nsec * 1e-9;
118	}	334	}
119	#endif	335	#endif
120		336
121	return ev_time ();	337	return ev_time ();
122	}	338	}
123		339
		340	#if EV_MULTIPLICITY
		341	ev_tstamp
		342	ev_now (EV_P)
		343	{
		344	return ev_rt_now;
		345	}
		346	#endif
		347
124	#define array_roundsize(base,n) ((n) \| 4 & ~3)	348	#define array_roundsize(type,n) (((n) \| 4) & ~3)
125		349
126	#define array_needsize(base,cur,cnt,init) \	350	#define array_needsize(type,base,cur,cnt,init) \
127	if ((cnt) > cur) \	351	if (expect_false ((cnt) > cur)) \
128	{ \	352	{ \
129	int newcnt = cur; \	353	int newcnt = cur; \
130	do \	354	do \
131	{ \	355	{ \
132	newcnt = array_roundsize (base, newcnt << 1); \	356	newcnt = array_roundsize (type, newcnt << 1); \
133	} \	357	} \
134	while ((cnt) > newcnt); \	358	while ((cnt) > newcnt); \
135	\	359	\
136	base = realloc (base, sizeof (base) (newcnt)); \	360	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
137	init (base + cur, newcnt - cur); \	361	init (base + cur, newcnt - cur); \
138	cur = newcnt; \	362	cur = newcnt; \
139	}	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;
140		375
141	/*****************************************************************************/	376	/*****************************************************************************/
142
143	typedef struct
144	{
145	struct ev_io *head;
146	unsigned char events;
147	unsigned char reify;
148	} ANFD;
149
150	static ANFD *anfds;
151	static int anfdmax;
152		377
153	static void	378	static void
154	anfds_init (ANFD *base, int count)	379	anfds_init (ANFD *base, int count)
155	{	380	{
156	while (count--)	381	while (count--)
…		…
161		386
162	++base;	387	++base;
163	}	388	}
164	}	389	}
165		390
166	typedef struct	391	void
		392	ev_feed_event (EV_P_ void *w, int revents)
167	{	393	{
168	W w;	394	W w_ = (W)w;
169	int events;
170	} ANPENDING;
171		395
172	static ANPENDING *pendings;	396	if (expect_false (w_->pending))
173	static int pendingmax, pendingcnt;
174
175	static void
176	event (W w, int events)
177	{
178	if (w->pending)
179	{	397	{
180	pendings [w->pending - 1].events \|= events;	398	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
181	return;	399	return;
182	}	400	}
183		401
184	w->pending = ++pendingcnt;	402	w_->pending = ++pendingcnt [ABSPRI (w_)];
185	array_needsize (pendings, pendingmax, pendingcnt, );	403	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
186	pendings [pendingcnt - 1].w = w;	404	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
187	pendings [pendingcnt - 1].events = events;	405	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
188	}	406	}
189		407
190	static void	408	static void
191	queue_events (W *events, int eventcnt, int type)	409	queue_events (EV_P_ W *events, int eventcnt, int type)
192	{	410	{
193	int i;	411	int i;
194		412
195	for (i = 0; i < eventcnt; ++i)	413	for (i = 0; i < eventcnt; ++i)
196	event (events [i], type);	414	ev_feed_event (EV_A_ events [i], type);
197	}	415	}
198		416
199	static void	417	inline void
200	fd_event (int fd, int events)	418	fd_event (EV_P_ int fd, int revents)
201	{	419	{
202	ANFD *anfd = anfds + fd;	420	ANFD *anfd = anfds + fd;
203	struct ev_io *w;	421	ev_io *w;
204		422
205	for (w = anfd->head; w; w = w->next)	423	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
206	{	424	{
207	int ev = w->events & events;	425	int ev = w->events & revents;
208		426
209	if (ev)	427	if (ev)
210	event ((W)w, ev);	428	ev_feed_event (EV_A_ (W)w, ev);
211	}	429	}
		430	}
		431
		432	void
		433	ev_feed_fd_event (EV_P_ int fd, int revents)
		434	{
		435	fd_event (EV_A_ fd, revents);
212	}	436	}
213		437
214	/*****************************************************************************/	438	/*****************************************************************************/
215		439
216	static int *fdchanges;	440	inline void
217	static int fdchangemax, fdchangecnt;	441	fd_reify (EV_P)
218
219	static void
220	fd_reify (void)
221	{	442	{
222	int i;	443	int i;
223		444
224	for (i = 0; i < fdchangecnt; ++i)	445	for (i = 0; i < fdchangecnt; ++i)
225	{	446	{
226	int fd = fdchanges [i];	447	int fd = fdchanges [i];
227	ANFD *anfd = anfds + fd;	448	ANFD *anfd = anfds + fd;
228	struct ev_io *w;	449	ev_io *w;
229		450
230	int events = 0;	451	int events = 0;
231		452
232	for (w = anfd->head; w; w = w->next)	453	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
233	events \|= w->events;	454	events \|= w->events;
234		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
235	anfd->reify = 0;	465	anfd->reify = 0;
236		466
237	if (anfd->events != events)
238	{
239	method_modify (fd, anfd->events, events);	467	backend_modify (EV_A_ fd, anfd->events, events);
240	anfd->events = events;	468	anfd->events = events;
241	}
242	}	469	}
243		470
244	fdchangecnt = 0;	471	fdchangecnt = 0;
245	}	472	}
246		473
247	static void	474	static void
248	fd_change (int fd)	475	fd_change (EV_P_ int fd)
249	{	476	{
250	if (anfds [fd].reify \|\| fdchangecnt < 0)	477	if (expect_false (anfds [fd].reify))
251	return;	478	return;
252		479
253	anfds [fd].reify = 1;	480	anfds [fd].reify = 1;
254		481
255	++fdchangecnt;	482	++fdchangecnt;
256	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	483	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
257	fdchanges [fdchangecnt - 1] = fd;	484	fdchanges [fdchangecnt - 1] = fd;
258	}	485	}
259		486
		487	static void
		488	fd_kill (EV_P_ int fd)
		489	{
		490	ev_io *w;
		491
		492	while ((w = (ev_io *)anfds [fd].head))
		493	{
		494	ev_io_stop (EV_A_ w);
		495	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		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
		507	}
		508
260	/* called on EBADF to verify fds */	509	/* called on EBADF to verify fds */
261	static void	510	static void
262	fd_recheck (void)	511	fd_ebadf (EV_P)
263	{	512	{
264	int fd;	513	int fd;
265		514
266	for (fd = 0; fd < anfdmax; ++fd)	515	for (fd = 0; fd < anfdmax; ++fd)
267	if (anfds [fd].events)	516	if (anfds [fd].events)
268	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	517	if (!fd_valid (fd) == -1 && errno == EBADF)
269	while (anfds [fd].head)	518	fd_kill (EV_A_ fd);
		519	}
		520
		521	/* called on ENOMEM in select/poll to kill some fds and retry */
		522	static void
		523	fd_enomem (EV_P)
		524	{
		525	int fd;
		526
		527	for (fd = anfdmax; fd--; )
		528	if (anfds [fd].events)
270	{	529	{
271	ev_io_stop (anfds [fd].head);	530	fd_kill (EV_A_ fd);
272	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE);	531	return;
273	}	532	}
		533	}
		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	}
274	}	548	}
275		549
276	/*****************************************************************************/	550	/*****************************************************************************/
277		551
278	static struct ev_timer **timers;
279	static int timermax, timercnt;
280
281	static struct ev_periodic **periodics;
282	static int periodicmax, periodiccnt;
283
284	static void	552	static void
285	upheap (WT *timers, int k)	553	upheap (WT *heap, int k)
286	{	554	{
287	WT w = timers [k];	555	WT w = heap [k];
288		556
289	while (k && timers [k >> 1]->at > w->at)	557	while (k && heap [k >> 1]->at > w->at)
290	{	558	{
291	timers [k] = timers [k >> 1];	559	heap [k] = heap [k >> 1];
292	timers [k]->active = k + 1;	560	((W)heap [k])->active = k + 1;
293	k >>= 1;	561	k >>= 1;
294	}	562	}
295		563
296	timers [k] = w;	564	heap [k] = w;
297	timers [k]->active = k + 1;	565	((W)heap [k])->active = k + 1;
298		566
299	}	567	}
300		568
301	static void	569	static void
302	downheap (WT *timers, int N, int k)	570	downheap (WT *heap, int N, int k)
303	{	571	{
304	WT w = timers [k];	572	WT w = heap [k];
305		573
306	while (k < (N >> 1))	574	while (k < (N >> 1))
307	{	575	{
308	int j = k << 1;	576	int j = k << 1;
309		577
310	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	578	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
311	++j;	579	++j;
312		580
313	if (w->at <= timers [j]->at)	581	if (w->at <= heap [j]->at)
314	break;	582	break;
315		583
316	timers [k] = timers [j];	584	heap [k] = heap [j];
317	timers [k]->active = k + 1;	585	((W)heap [k])->active = k + 1;
318	k = j;	586	k = j;
319	}	587	}
320		588
321	timers [k] = w;	589	heap [k] = w;
322	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);
323	}	598	}
324		599
325	/*****************************************************************************/	600	/*****************************************************************************/
326		601
327	typedef struct	602	typedef struct
328	{	603	{
329	struct ev_signal *head;	604	WL head;
330	sig_atomic_t volatile gotsig;	605	sig_atomic_t volatile gotsig;
331	} ANSIG;	606	} ANSIG;
332		607
333	static ANSIG *signals;	608	static ANSIG *signals;
334	static int signalmax;	609	static int signalmax;
335		610
336	static int sigpipe [2];	611	static int sigpipe [2];
337	static sig_atomic_t volatile gotsig;	612	static sig_atomic_t volatile gotsig;
338	static struct ev_io sigev;	613	static ev_io sigev;
339		614
340	static void	615	static void
341	signals_init (ANSIG *base, int count)	616	signals_init (ANSIG *base, int count)
342	{	617	{
343	while (count--)	618	while (count--)
…		…
350	}	625	}
351		626
352	static void	627	static void
353	sighandler (int signum)	628	sighandler (int signum)
354	{	629	{
		630	#if _WIN32
		631	signal (signum, sighandler);
		632	#endif
		633
355	signals [signum - 1].gotsig = 1;	634	signals [signum - 1].gotsig = 1;
356		635
357	if (!gotsig)	636	if (!gotsig)
358	{	637	{
		638	int old_errno = errno;
359	gotsig = 1;	639	gotsig = 1;
360	write (sigpipe [1], &signum, 1);	640	write (sigpipe [1], &signum, 1);
		641	errno = old_errno;
361	}	642	}
362	}	643	}
363		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
364	static void	665	static void
365	sigcb (struct ev_io *iow, int revents)	666	sigcb (EV_P_ ev_io *iow, int revents)
366	{	667	{
367	struct ev_signal *w;
368	int sig;	668	int signum;
369		669
370	read (sigpipe [0], &revents, 1);	670	read (sigpipe [0], &revents, 1);
371	gotsig = 0;	671	gotsig = 0;
372		672
373	for (sig = signalmax; sig--; )	673	for (signum = signalmax; signum--; )
374	if (signals [sig].gotsig)	674	if (signals [signum].gotsig)
375	{	675	ev_feed_signal_event (EV_A_ signum + 1);
376	signals [sig].gotsig = 0;
377
378	for (w = signals [sig].head; w; w = w->next)
379	event ((W)w, EV_SIGNAL);
380	}
381	}	676	}
382		677
383	static void	678	static void
384	siginit (void)	679	fd_intern (int fd)
385	{	680	{
		681	#ifdef _WIN32
		682	int arg = 1;
		683	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		684	#else
386	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	685	fcntl (fd, F_SETFD, FD_CLOEXEC);
387	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
388
389	/* rather than sort out wether we really need nb, set it */
390	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	686	fcntl (fd, F_SETFL, O_NONBLOCK);
391	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	687	#endif
		688	}
		689
		690	static void
		691	siginit (EV_P)
		692	{
		693	fd_intern (sigpipe [0]);
		694	fd_intern (sigpipe [1]);
392		695
393	ev_io_set (&sigev, sigpipe [0], EV_READ);	696	ev_io_set (&sigev, sigpipe [0], EV_READ);
394	ev_io_start (&sigev);	697	ev_io_start (EV_A_ &sigev);
		698	ev_unref (EV_A); /* child watcher should not keep loop alive */
395	}	699	}
396		700
397	/*****************************************************************************/	701	/*****************************************************************************/
398		702
399	static struct ev_idle **idles;
400	static int idlemax, idlecnt;
401
402	static struct ev_prepare **prepares;
403	static int preparemax, preparecnt;
404
405	static struct ev_check **checks;
406	static int checkmax, checkcnt;
407
408	/*****************************************************************************/
409
410	static struct ev_child *childs [PID_HASHSIZE];	703	static ev_child *childs [PID_HASHSIZE];
		704
		705	#ifndef _WIN32
		706
411	static struct ev_signal childev;	707	static ev_signal childev;
412		708
413	#ifndef WCONTINUED	709	#ifndef WCONTINUED
414	# define WCONTINUED 0	710	# define WCONTINUED 0
415	#endif	711	#endif
416		712
417	static void	713	static void
		714	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		715	{
		716	ev_child *w;
		717
		718	for (w = (ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)
		719	if (w->pid == pid \|\| !w->pid)
		720	{
		721	ev_priority (w) = ev_priority (sw); /* need to do it now */
		722	w->rpid = pid;
		723	w->rstatus = status;
		724	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		725	}
		726	}
		727
		728	static void
418	childcb (struct ev_signal *sw, int revents)	729	childcb (EV_P_ ev_signal *sw, int revents)
419	{	730	{
420	struct ev_child *w;
421	int pid, status;	731	int pid, status;
422		732
423	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	733	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
424	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	734	{
425	if (w->pid == pid \|\| w->pid == -1)	735	/* make sure we are called again until all childs have been reaped */
426	{	736	/* we need to do it this way so that the callback gets called before we continue */
427	w->status = status;	737	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
428	event ((W)w, EV_CHILD);	738
429	}	739	child_reap (EV_A_ sw, pid, pid, status);
		740	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		741	}
430	}	742	}
		743
		744	#endif
431		745
432	/*****************************************************************************/	746	/*****************************************************************************/
433		747
		748	#if EV_USE_PORT
		749	# include "ev_port.c"
		750	#endif
		751	#if EV_USE_KQUEUE
		752	# include "ev_kqueue.c"
		753	#endif
434	#if EV_USE_EPOLL	754	#if EV_USE_EPOLL
435	# include "ev_epoll.c"	755	# include "ev_epoll.c"
436	#endif	756	#endif
		757	#if EV_USE_POLL
		758	# include "ev_poll.c"
		759	#endif
437	#if EV_USE_SELECT	760	#if EV_USE_SELECT
438	# include "ev_select.c"	761	# include "ev_select.c"
439	#endif	762	#endif
440		763
441	int	764	int
…		…
448	ev_version_minor (void)	771	ev_version_minor (void)
449	{	772	{
450	return EV_VERSION_MINOR;	773	return EV_VERSION_MINOR;
451	}	774	}
452		775
453	int ev_init (int flags)	776	/* return true if we are running with elevated privileges and should ignore env variables */
		777	static int
		778	enable_secure (void)
454	{	779	{
455	if (!ev_method)	780	#ifdef _WIN32
		781	return 0;
		782	#else
		783	return getuid () != geteuid ()
		784	\|\| getgid () != getegid ();
		785	#endif
		786	}
		787
		788	unsigned int
		789	ev_supported_backends (void)
		790	{
		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)
456	{	838	{
457	#if EV_USE_MONOTONIC	839	#if EV_USE_MONOTONIC
458	{	840	{
459	struct timespec ts;	841	struct timespec ts;
460	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	842	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
461	have_monotonic = 1;	843	have_monotonic = 1;
462	}	844	}
463	#endif	845	#endif
464		846
465	ev_now = ev_time ();	847	ev_rt_now = ev_time ();
466	now = get_clock ();	848	mn_now = get_clock ();
		849	now_floor = mn_now;
467	diff = ev_now - now;	850	rtmn_diff = ev_rt_now - mn_now;
468		851
469	if (pipe (sigpipe))	852	if (!(flags & EVFLAG_NOENV)
470	return 0;	853	&& !enable_secure ()
		854	&& getenv ("LIBEV_FLAGS"))
		855	flags = atoi (getenv ("LIBEV_FLAGS"));
471		856
472	ev_method = EVMETHOD_NONE;	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
		864	#if EV_USE_KQUEUE
		865	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		866	#endif
473	#if EV_USE_EPOLL	867	#if EV_USE_EPOLL
474	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	868	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		869	#endif
		870	#if EV_USE_POLL
		871	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
475	#endif	872	#endif
476	#if EV_USE_SELECT	873	#if EV_USE_SELECT
477	if (ev_method == EVMETHOD_NONE) select_init (flags);	874	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
478	#endif	875	#endif
479		876
480	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))
481	{	1004	{
482	ev_watcher_init (&sigev, sigcb);
483	siginit ();	1005	siginit (EV_A);
484		1006
		1007	#ifndef _WIN32
485	ev_signal_init (&childev, childcb, SIGCHLD);	1008	ev_signal_init (&childev, childcb, SIGCHLD);
		1009	ev_set_priority (&childev, EV_MAXPRI);
486	ev_signal_start (&childev);	1010	ev_signal_start (EV_A_ &childev);
		1011	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1012	#endif
487	}	1013	}
		1014	else
		1015	ev_default_loop_ptr = 0;
488	}	1016	}
489		1017
490	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;
491	}	1051	}
492		1052
493	/*****************************************************************************/	1053	/*****************************************************************************/
494		1054
495	void
496	ev_fork_prepare (void)
497	{
498	/* nop */
499	}
500
501	void
502	ev_fork_parent (void)
503	{
504	/* nop */
505	}
506
507	void
508	ev_fork_child (void)
509	{
510	#if EV_USE_EPOLL
511	if (ev_method == EVMETHOD_EPOLL)
512	epoll_postfork_child ();
513	#endif
514
515	ev_io_stop (&sigev);
516	close (sigpipe [0]);
517	close (sigpipe [1]);
518	pipe (sigpipe);
519	siginit ();
520	}
521
522	/*****************************************************************************/
523
524	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
525	call_pending (void)	1068	call_pending (EV_P)
526	{	1069	{
		1070	int pri;
		1071
		1072	for (pri = NUMPRI; pri--; )
527	while (pendingcnt)	1073	while (pendingcnt [pri])
528	{	1074	{
529	ANPENDING *p = pendings + --pendingcnt;	1075	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
530		1076
531	if (p->w)	1077	if (expect_true (p->w))
532	{	1078	{
		1079	assert (("non-pending watcher on pending list", p->w->pending));
		1080
533	p->w->pending = 0;	1081	p->w->pending = 0;
534	p->w->cb (p->w, p->events);	1082	EV_CB_INVOKE (p->w, p->events);
535	}	1083	}
536	}	1084	}
537	}	1085	}
538		1086
539	static void	1087	inline void
540	timers_reify (void)	1088	timers_reify (EV_P)
541	{	1089	{
542	while (timercnt && timers [0]->at <= now)	1090	while (timercnt && ((WT)timers [0])->at <= mn_now)
543	{	1091	{
544	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)));
545		1095
546	/* first reschedule or stop timer */	1096	/* first reschedule or stop timer */
547	if (w->repeat)	1097	if (w->repeat)
548	{	1098	{
549	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
550	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
551	downheap ((WT *)timers, timercnt, 0);	1105	downheap ((WT *)timers, timercnt, 0);
552	}	1106	}
553	else	1107	else
554	ev_timer_stop (w); /* nonrepeating: stop timer */	1108	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
555		1109
556	event ((W)w, EV_TIMEOUT);	1110	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
557	}	1111	}
558	}	1112	}
559		1113
560	static void	1114	#if EV_PERIODICS
		1115	inline void
561	periodics_reify (void)	1116	periodics_reify (EV_P)
562	{	1117	{
563	while (periodiccnt && periodics [0]->at <= ev_now)	1118	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
564	{	1119	{
565	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)));
566		1123
567	/* first reschedule or stop timer */	1124	/* first reschedule or stop timer */
568	if (w->interval)	1125	if (w->reschedule_cb)
569	{	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	{
570	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;
571	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));
572	downheap ((WT *)periodics, periodiccnt, 0);	1135	downheap ((WT *)periodics, periodiccnt, 0);
573	}	1136	}
574	else	1137	else
575	ev_periodic_stop (w); /* nonrepeating: stop timer */	1138	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
576		1139
577	event ((W)w, EV_PERIODIC);	1140	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
578	}	1141	}
579	}	1142	}
580		1143
581	static void	1144	static void
582	periodics_reschedule (ev_tstamp diff)	1145	periodics_reschedule (EV_P)
583	{	1146	{
584	int i;	1147	int i;
585		1148
586	/* adjust periodics after time jump */	1149	/* adjust periodics after time jump */
587	for (i = 0; i < periodiccnt; ++i)	1150	for (i = 0; i < periodiccnt; ++i)
588	{	1151	{
589	struct ev_periodic *w = periodics [i];	1152	ev_periodic *w = periodics [i];
590		1153
		1154	if (w->reschedule_cb)
		1155	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
591	if (w->interval)	1156	else if (w->interval)
		1157	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1158	}
		1159
		1160	/* now rebuild the heap */
		1161	for (i = periodiccnt >> 1; i--; )
		1162	downheap ((WT *)periodics, periodiccnt, i);
		1163	}
		1164	#endif
		1165
		1166	inline int
		1167	time_update_monotonic (EV_P)
		1168	{
		1169	mn_now = get_clock ();
		1170
		1171	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1172	{
		1173	ev_rt_now = rtmn_diff + mn_now;
		1174	return 0;
		1175	}
		1176	else
		1177	{
		1178	now_floor = mn_now;
		1179	ev_rt_now = ev_time ();
		1180	return 1;
		1181	}
		1182	}
		1183
		1184	inline void
		1185	time_update (EV_P)
		1186	{
		1187	int i;
		1188
		1189	#if EV_USE_MONOTONIC
		1190	if (expect_true (have_monotonic))
		1191	{
		1192	if (time_update_monotonic (EV_A))
592	{	1193	{
593	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1194	ev_tstamp odiff = rtmn_diff;
594		1195
595	if (fabs (diff) >= 1e-4)	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; )
596	{	1205	{
597	ev_periodic_stop (w);	1206	rtmn_diff = ev_rt_now - mn_now;
598	ev_periodic_start (w);
599		1207
600	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1208	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1209	return; /* all is well */
		1210
		1211	ev_rt_now = ev_time ();
		1212	mn_now = get_clock ();
		1213	now_floor = mn_now;
601	}	1214	}
		1215
		1216	# if EV_PERIODICS
		1217	periodics_reschedule (EV_A);
		1218	# endif
		1219	/* no timer adjustment, as the monotonic clock doesn't jump */
		1220	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
602	}	1221	}
603	}	1222	}
604	}	1223	else
605		1224	#endif
606	static void	1225	{
607	time_update (void)
608	{
609	int i;
610
611	ev_now = ev_time ();	1226	ev_rt_now = ev_time ();
612		1227
613	if (have_monotonic)	1228	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
614	{
615	ev_tstamp odiff = diff;
616
617	for (i = 4; --i; ) /* loop a few times, before making important decisions */
618	{	1229	{
619	now = get_clock ();	1230	#if EV_PERIODICS
620	diff = ev_now - now;
621
622	if (fabs (odiff - diff) < MIN_TIMEJUMP)
623	return; /* all is well */
624
625	ev_now = ev_time ();
626	}
627
628	periodics_reschedule (diff - odiff);
629	/* no timer adjustment, as the monotonic clock doesn't jump */
630	}
631	else
632	{
633	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
634	{
635	periodics_reschedule (ev_now - now);	1231	periodics_reschedule (EV_A);
		1232	#endif
636		1233
637	/* 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 */
638	for (i = 0; i < timercnt; ++i)	1235	for (i = 0; i < timercnt; ++i)
639	timers [i]->at += diff;	1236	((WT)timers [i])->at += ev_rt_now - mn_now;
640	}	1237	}
641		1238
642	now = ev_now;	1239	mn_now = ev_rt_now;
643	}	1240	}
644	}	1241	}
645		1242
646	int ev_loop_done;	1243	void
		1244	ev_ref (EV_P)
		1245	{
		1246	++activecnt;
		1247	}
647		1248
		1249	void
		1250	ev_unref (EV_P)
		1251	{
		1252	--activecnt;
		1253	}
		1254
		1255	static int loop_done;
		1256
		1257	void
648	void ev_loop (int flags)	1258	ev_loop (EV_P_ int flags)
649	{	1259	{
650	double block;
651	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	1260	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)
		1261	? EVUNLOOP_ONE
		1262	: EVUNLOOP_CANCEL;
652		1263
653	do	1264	while (activecnt)
654	{	1265	{
655	/* queue check watchers (and execute them) */	1266	/* queue check watchers (and execute them) */
656	if (preparecnt)	1267	if (expect_false (preparecnt))
657	{	1268	{
658	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1269	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
659	call_pending ();	1270	call_pending (EV_A);
660	}	1271	}
661		1272
		1273	/* we might have forked, so reify kernel state if necessary */
		1274	if (expect_false (postfork))
		1275	loop_fork (EV_A);
		1276
662	/* update fd-related kernel structures */	1277	/* update fd-related kernel structures */
663	fd_reify ();	1278	fd_reify (EV_A);
664		1279
665	/* calculate blocking time */	1280	/* calculate blocking time */
		1281	{
		1282	double block;
666		1283
667	/* we only need this for !monotonic clockor timers, but as we basically
668	always have timers, we just calculate it always */
669	ev_now = ev_time ();
670
671	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1284	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
672	block = 0.;	1285	block = 0.; /* do not block at all */
673	else	1286	else
674	{	1287	{
		1288	/* update time to cancel out callback processing overhead */
		1289	#if EV_USE_MONOTONIC
		1290	if (expect_true (have_monotonic))
		1291	time_update_monotonic (EV_A);
		1292	else
		1293	#endif
		1294	{
		1295	ev_rt_now = ev_time ();
		1296	mn_now = ev_rt_now;
		1297	}
		1298
675	block = MAX_BLOCKTIME;	1299	block = MAX_BLOCKTIME;
676		1300
677	if (timercnt)	1301	if (timercnt)
678	{	1302	{
679	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1303	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
680	if (block > to) block = to;	1304	if (block > to) block = to;
681	}	1305	}
682		1306
		1307	#if EV_PERIODICS
683	if (periodiccnt)	1308	if (periodiccnt)
684	{	1309	{
685	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1310	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
686	if (block > to) block = to;	1311	if (block > to) block = to;
687	}	1312	}
		1313	#endif
688		1314
689	if (block < 0.) block = 0.;	1315	if (expect_false (block < 0.)) block = 0.;
690	}	1316	}
691		1317
692	method_poll (block);	1318	backend_poll (EV_A_ block);
		1319	}
693		1320
694	/* update ev_now, do magic */	1321	/* update ev_rt_now, do magic */
695	time_update ();	1322	time_update (EV_A);
696		1323
697	/* queue pending timers and reschedule them */	1324	/* queue pending timers and reschedule them */
698	timers_reify (); /* relative timers called last */	1325	timers_reify (EV_A); /* relative timers called last */
		1326	#if EV_PERIODICS
699	periodics_reify (); /* absolute timers called first */	1327	periodics_reify (EV_A); /* absolute timers called first */
		1328	#endif
700		1329
701	/* queue idle watchers unless io or timers are pending */	1330	/* queue idle watchers unless other events are pending */
702	if (!pendingcnt)	1331	if (idlecnt && !any_pending (EV_A))
703	queue_events ((W *)idles, idlecnt, EV_IDLE);	1332	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
704		1333
705	/* queue check watchers, to be executed first */	1334	/* queue check watchers, to be executed first */
706	if (checkcnt)	1335	if (expect_false (checkcnt))
707	queue_events ((W *)checks, checkcnt, EV_CHECK);	1336	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
708		1337
709	call_pending ();	1338	call_pending (EV_A);
710	}
711	while (!ev_loop_done);
712		1339
713	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	{
714	ev_loop_done = 0;	1351	loop_done = how;
715	}	1352	}
716		1353
717	/*****************************************************************************/	1354	/*****************************************************************************/
718		1355
719	static void	1356	inline void
720	wlist_add (WL *head, WL elem)	1357	wlist_add (WL *head, WL elem)
721	{	1358	{
722	elem->next = *head;	1359	elem->next = *head;
723	*head = elem;	1360	*head = elem;
724	}	1361	}
725		1362
726	static void	1363	inline void
727	wlist_del (WL *head, WL elem)	1364	wlist_del (WL *head, WL elem)
728	{	1365	{
729	while (*head)	1366	while (*head)
730	{	1367	{
731	if (*head == elem)	1368	if (*head == elem)
…		…
736		1373
737	head = &(*head)->next;	1374	head = &(*head)->next;
738	}	1375	}
739	}	1376	}
740		1377
741	static void	1378	inline void
742	ev_clear_pending (W w)	1379	ev_clear_pending (EV_P_ W w)
743	{	1380	{
744	if (w->pending)	1381	if (w->pending)
745	{	1382	{
746	pendings [w->pending - 1].w = 0;	1383	pendings [ABSPRI (w)][w->pending - 1].w = 0;
747	w->pending = 0;	1384	w->pending = 0;
748	}	1385	}
749	}	1386	}
750		1387
751	static void	1388	inline void
752	ev_start (W w, int active)	1389	ev_start (EV_P_ W w, int active)
753	{	1390	{
		1391	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1392	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1393
754	w->active = active;	1394	w->active = active;
		1395	ev_ref (EV_A);
755	}	1396	}
756		1397
757	static void	1398	inline void
758	ev_stop (W w)	1399	ev_stop (EV_P_ W w)
759	{	1400	{
		1401	ev_unref (EV_A);
760	w->active = 0;	1402	w->active = 0;
761	}	1403	}
762		1404
763	/*****************************************************************************/	1405	/*****************************************************************************/
764		1406
765	void	1407	void
766	ev_io_start (struct ev_io *w)	1408	ev_io_start (EV_P_ ev_io *w)
767	{	1409	{
768	if (ev_is_active (w))
769	return;
770
771	int fd = w->fd;	1410	int fd = w->fd;
772		1411
		1412	if (expect_false (ev_is_active (w)))
		1413	return;
		1414
773	assert (("ev_io_start called with negative fd", fd >= 0));	1415	assert (("ev_io_start called with negative fd", fd >= 0));
774		1416
775	ev_start ((W)w, 1);	1417	ev_start (EV_A_ (W)w, 1);
776	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1418	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
777	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1419	wlist_add ((WL *)&anfds[fd].head, (WL)w);
778		1420
779	fd_change (fd);	1421	fd_change (EV_A_ fd);
780	}	1422	}
781		1423
782	void	1424	void
783	ev_io_stop (struct ev_io *w)	1425	ev_io_stop (EV_P_ ev_io *w)
784	{	1426	{
785	ev_clear_pending ((W)w);	1427	ev_clear_pending (EV_A_ (W)w);
786	if (!ev_is_active (w))	1428	if (expect_false (!ev_is_active (w)))
787	return;	1429	return;
		1430
		1431	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
788		1432
789	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1433	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
790	ev_stop ((W)w);	1434	ev_stop (EV_A_ (W)w);
791		1435
792	fd_change (w->fd);	1436	fd_change (EV_A_ w->fd);
793	}	1437	}
794		1438
795	void	1439	void
796	ev_timer_start (struct ev_timer *w)	1440	ev_timer_start (EV_P_ ev_timer *w)
797	{	1441	{
798	if (ev_is_active (w))	1442	if (expect_false (ev_is_active (w)))
799	return;	1443	return;
800		1444
801	w->at += now;	1445	((WT)w)->at += mn_now;
802		1446
803	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.));
804		1448
805	ev_start ((W)w, ++timercnt);	1449	ev_start (EV_A_ (W)w, ++timercnt);
806	array_needsize (timers, timermax, timercnt, );	1450	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
807	timers [timercnt - 1] = w;	1451	timers [timercnt - 1] = w;
808	upheap ((WT *)timers, timercnt - 1);	1452	upheap ((WT *)timers, timercnt - 1);
809	}
810		1453
		1454	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1455	}
		1456
811	void	1457	void
812	ev_timer_stop (struct ev_timer *w)	1458	ev_timer_stop (EV_P_ ev_timer *w)
813	{	1459	{
814	ev_clear_pending ((W)w);	1460	ev_clear_pending (EV_A_ (W)w);
815	if (!ev_is_active (w))	1461	if (expect_false (!ev_is_active (w)))
816	return;	1462	return;
817		1463
		1464	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1465
818	if (w->active < timercnt--)	1466	if (expect_true (((W)w)->active < timercnt--))
819	{	1467	{
820	timers [w->active - 1] = timers [timercnt];	1468	timers [((W)w)->active - 1] = timers [timercnt];
821	downheap ((WT *)timers, timercnt, w->active - 1);	1469	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
822	}	1470	}
823		1471
824	w->at = w->repeat;	1472	((WT)w)->at -= mn_now;
825		1473
826	ev_stop ((W)w);	1474	ev_stop (EV_A_ (W)w);
827	}	1475	}
828		1476
829	void	1477	void
830	ev_timer_again (struct ev_timer *w)	1478	ev_timer_again (EV_P_ ev_timer *w)
831	{	1479	{
832	if (ev_is_active (w))	1480	if (ev_is_active (w))
833	{	1481	{
834	if (w->repeat)	1482	if (w->repeat)
835	{	1483	{
836	w->at = now + w->repeat;	1484	((WT)w)->at = mn_now + w->repeat;
837	downheap ((WT *)timers, timercnt, w->active - 1);	1485	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
838	}	1486	}
839	else	1487	else
840	ev_timer_stop (w);	1488	ev_timer_stop (EV_A_ w);
841	}	1489	}
842	else if (w->repeat)	1490	else if (w->repeat)
		1491	{
		1492	w->at = w->repeat;
843	ev_timer_start (w);	1493	ev_timer_start (EV_A_ w);
		1494	}
844	}	1495	}
845		1496
		1497	#if EV_PERIODICS
846	void	1498	void
847	ev_periodic_start (struct ev_periodic *w)	1499	ev_periodic_start (EV_P_ ev_periodic *w)
848	{	1500	{
849	if (ev_is_active (w))	1501	if (expect_false (ev_is_active (w)))
850	return;	1502	return;
851		1503
		1504	if (w->reschedule_cb)
		1505	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1506	else if (w->interval)
		1507	{
852	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.));
853
854	/* 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 */
855	if (w->interval)
856	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	}
857		1512
858	ev_start ((W)w, ++periodiccnt);	1513	ev_start (EV_A_ (W)w, ++periodiccnt);
859	array_needsize (periodics, periodicmax, periodiccnt, );	1514	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
860	periodics [periodiccnt - 1] = w;	1515	periodics [periodiccnt - 1] = w;
861	upheap ((WT *)periodics, periodiccnt - 1);	1516	upheap ((WT *)periodics, periodiccnt - 1);
862	}
863		1517
		1518	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1519	}
		1520
864	void	1521	void
865	ev_periodic_stop (struct ev_periodic *w)	1522	ev_periodic_stop (EV_P_ ev_periodic *w)
866	{	1523	{
867	ev_clear_pending ((W)w);	1524	ev_clear_pending (EV_A_ (W)w);
868	if (!ev_is_active (w))	1525	if (expect_false (!ev_is_active (w)))
869	return;	1526	return;
870		1527
		1528	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1529
871	if (w->active < periodiccnt--)	1530	if (expect_true (((W)w)->active < periodiccnt--))
872	{	1531	{
873	periodics [w->active - 1] = periodics [periodiccnt];	1532	periodics [((W)w)->active - 1] = periodics [periodiccnt];
874	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1533	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
875	}	1534	}
876		1535
877	ev_stop ((W)w);	1536	ev_stop (EV_A_ (W)w);
878	}	1537	}
879		1538
880	void	1539	void
		1540	ev_periodic_again (EV_P_ ev_periodic *w)
		1541	{
		1542	/* TODO: use adjustheap and recalculation */
		1543	ev_periodic_stop (EV_A_ w);
		1544	ev_periodic_start (EV_A_ w);
		1545	}
		1546	#endif
		1547
		1548	void
		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);
		1627	}
		1628
		1629	#ifndef SA_RESTART
		1630	# define SA_RESTART 0
		1631	#endif
		1632
		1633	void
881	ev_signal_start (struct ev_signal *w)	1634	ev_signal_start (EV_P_ ev_signal *w)
882	{	1635	{
		1636	#if EV_MULTIPLICITY
		1637	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1638	#endif
883	if (ev_is_active (w))	1639	if (expect_false (ev_is_active (w)))
884	return;	1640	return;
885		1641
886	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));
887		1643
888	ev_start ((W)w, 1);	1644	ev_start (EV_A_ (W)w, 1);
889	array_needsize (signals, signalmax, w->signum, signals_init);	1645	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
890	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1646	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
891		1647
892	if (!w->next)	1648	if (!((WL)w)->next)
893	{	1649	{
		1650	#if _WIN32
		1651	signal (w->signum, sighandler);
		1652	#else
894	struct sigaction sa;	1653	struct sigaction sa;
895	sa.sa_handler = sighandler;	1654	sa.sa_handler = sighandler;
896	sigfillset (&sa.sa_mask);	1655	sigfillset (&sa.sa_mask);
897	sa.sa_flags = 0;	1656	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
898	sigaction (w->signum, &sa, 0);	1657	sigaction (w->signum, &sa, 0);
		1658	#endif
899	}	1659	}
900	}	1660	}
901		1661
902	void	1662	void
903	ev_signal_stop (struct ev_signal *w)	1663	ev_signal_stop (EV_P_ ev_signal *w)
904	{	1664	{
905	ev_clear_pending ((W)w);	1665	ev_clear_pending (EV_A_ (W)w);
906	if (!ev_is_active (w))	1666	if (expect_false (!ev_is_active (w)))
907	return;	1667	return;
908		1668
909	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1669	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
910	ev_stop ((W)w);	1670	ev_stop (EV_A_ (W)w);
911		1671
912	if (!signals [w->signum - 1].head)	1672	if (!signals [w->signum - 1].head)
913	signal (w->signum, SIG_DFL);	1673	signal (w->signum, SIG_DFL);
914	}	1674	}
915		1675
916	void	1676	void
917	ev_idle_start (struct ev_idle *w)
918	{
919	if (ev_is_active (w))
920	return;
921
922	ev_start ((W)w, ++idlecnt);
923	array_needsize (idles, idlemax, idlecnt, );
924	idles [idlecnt - 1] = w;
925	}
926
927	void
928	ev_idle_stop (struct ev_idle *w)
929	{
930	ev_clear_pending ((W)w);
931	if (ev_is_active (w))
932	return;
933
934	idles [w->active - 1] = idles [--idlecnt];
935	ev_stop ((W)w);
936	}
937
938	void
939	ev_prepare_start (struct ev_prepare *w)
940	{
941	if (ev_is_active (w))
942	return;
943
944	ev_start ((W)w, ++preparecnt);
945	array_needsize (prepares, preparemax, preparecnt, );
946	prepares [preparecnt - 1] = w;
947	}
948
949	void
950	ev_prepare_stop (struct ev_prepare *w)
951	{
952	ev_clear_pending ((W)w);
953	if (ev_is_active (w))
954	return;
955
956	prepares [w->active - 1] = prepares [--preparecnt];
957	ev_stop ((W)w);
958	}
959
960	void
961	ev_check_start (struct ev_check *w)
962	{
963	if (ev_is_active (w))
964	return;
965
966	ev_start ((W)w, ++checkcnt);
967	array_needsize (checks, checkmax, checkcnt, );
968	checks [checkcnt - 1] = w;
969	}
970
971	void
972	ev_check_stop (struct ev_check *w)
973	{
974	ev_clear_pending ((W)w);
975	if (ev_is_active (w))
976	return;
977
978	checks [w->active - 1] = checks [--checkcnt];
979	ev_stop ((W)w);
980	}
981
982	void
983	ev_child_start (struct ev_child *w)	1677	ev_child_start (EV_P_ ev_child *w)
984	{	1678	{
		1679	#if EV_MULTIPLICITY
		1680	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1681	#endif
985	if (ev_is_active (w))	1682	if (expect_false (ev_is_active (w)))
986	return;	1683	return;
987		1684
988	ev_start ((W)w, 1);	1685	ev_start (EV_A_ (W)w, 1);
989	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1686	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
990	}	1687	}
991		1688
992	void	1689	void
993	ev_child_stop (struct ev_child *w)	1690	ev_child_stop (EV_P_ ev_child *w)
994	{	1691	{
995	ev_clear_pending ((W)w);	1692	ev_clear_pending (EV_A_ (W)w);
996	if (ev_is_active (w))	1693	if (expect_false (!ev_is_active (w)))
997	return;	1694	return;
998		1695
999	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1696	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1000	ev_stop ((W)w);	1697	ev_stop (EV_A_ (W)w);
1001	}	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
1002		1746
1003	/*****************************************************************************/	1747	/*****************************************************************************/
1004		1748
1005	struct ev_once	1749	struct ev_once
1006	{	1750	{
1007	struct ev_io io;	1751	ev_io io;
1008	struct ev_timer to;	1752	ev_timer to;
1009	void (cb)(int revents, void arg);	1753	void (cb)(int revents, void arg);
1010	void *arg;	1754	void *arg;
1011	};	1755	};
1012		1756
1013	static void	1757	static void
1014	once_cb (struct ev_once *once, int revents)	1758	once_cb (EV_P_ struct ev_once *once, int revents)
1015	{	1759	{
1016	void (cb)(int revents, void arg) = once->cb;	1760	void (cb)(int revents, void arg) = once->cb;
1017	void *arg = once->arg;	1761	void *arg = once->arg;
1018		1762
1019	ev_io_stop (&once->io);	1763	ev_io_stop (EV_A_ &once->io);
1020	ev_timer_stop (&once->to);	1764	ev_timer_stop (EV_A_ &once->to);
1021	free (once);	1765	ev_free (once);
1022		1766
1023	cb (revents, arg);	1767	cb (revents, arg);
1024	}	1768	}
1025		1769
1026	static void	1770	static void
1027	once_cb_io (struct ev_io *w, int revents)	1771	once_cb_io (EV_P_ ev_io *w, int revents)
1028	{	1772	{
1029	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);
1030	}	1774	}
1031		1775
1032	static void	1776	static void
1033	once_cb_to (struct ev_timer *w, int revents)	1777	once_cb_to (EV_P_ ev_timer *w, int revents)
1034	{	1778	{
1035	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);
1036	}	1780	}
1037		1781
1038	void	1782	void
1039	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)
1040	{	1784	{
1041	struct ev_once *once = malloc (sizeof (struct ev_once));	1785	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
1042		1786
1043	if (!once)	1787	if (expect_false (!once))
		1788	{
1044	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1789	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1045	else	1790	return;
1046	{	1791	}
		1792
1047	once->cb = cb;	1793	once->cb = cb;
1048	once->arg = arg;	1794	once->arg = arg;
1049		1795
1050	ev_watcher_init (&once->io, once_cb_io);	1796	ev_init (&once->io, once_cb_io);
1051	if (fd >= 0)	1797	if (fd >= 0)
1052	{	1798	{
1053	ev_io_set (&once->io, fd, events);	1799	ev_io_set (&once->io, fd, events);
1054	ev_io_start (&once->io);	1800	ev_io_start (EV_A_ &once->io);
1055	}	1801	}
1056		1802
1057	ev_watcher_init (&once->to, once_cb_to);	1803	ev_init (&once->to, once_cb_to);
1058	if (timeout >= 0.)	1804	if (timeout >= 0.)
1059	{	1805	{
1060	ev_timer_set (&once->to, timeout, 0.);	1806	ev_timer_set (&once->to, timeout, 0.);
1061	ev_timer_start (&once->to);	1807	ev_timer_start (EV_A_ &once->to);
1062	}
1063	}
1064	}
1065
1066	/*****************************************************************************/
1067
1068	#if 0
1069
1070	struct ev_io wio;
1071
1072	static void
1073	sin_cb (struct ev_io *w, int revents)
1074	{
1075	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1076	}
1077
1078	static void
1079	ocb (struct ev_timer *w, int revents)
1080	{
1081	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1082	ev_timer_stop (w);
1083	ev_timer_start (w);
1084	}
1085
1086	static void
1087	scb (struct ev_signal *w, int revents)
1088	{
1089	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1090	ev_io_stop (&wio);
1091	ev_io_start (&wio);
1092	}
1093
1094	static void
1095	gcb (struct ev_signal *w, int revents)
1096	{
1097	fprintf (stderr, "generic %x\n", revents);
1098
1099	}
1100
1101	int main (void)
1102	{
1103	ev_init (0);
1104
1105	ev_io_init (&wio, sin_cb, 0, EV_READ);
1106	ev_io_start (&wio);
1107
1108	struct ev_timer t[10000];
1109
1110	#if 0
1111	int i;
1112	for (i = 0; i < 10000; ++i)
1113	{	1808	}
1114	struct ev_timer *w = t + i;
1115	ev_watcher_init (w, ocb, i);
1116	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1117	ev_timer_start (w);
1118	if (drand48 () < 0.5)
1119	ev_timer_stop (w);
1120	}
1121	#endif
1122
1123	struct ev_timer t1;
1124	ev_timer_init (&t1, ocb, 5, 10);
1125	ev_timer_start (&t1);
1126
1127	struct ev_signal sig;
1128	ev_signal_init (&sig, scb, SIGQUIT);
1129	ev_signal_start (&sig);
1130
1131	struct ev_check cw;
1132	ev_check_init (&cw, gcb);
1133	ev_check_start (&cw);
1134
1135	struct ev_idle iw;
1136	ev_idle_init (&iw, gcb);
1137	ev_idle_start (&iw);
1138
1139	ev_loop (0);
1140
1141	return 0;
1142	}	1809	}
1143		1810
		1811	#ifdef __cplusplus
		1812	}
1144	#endif	1813	#endif
1145		1814
1146
1147
1148

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Comparing libev/ev.c (file contents): Revision 1.36 by root, Thu Nov 1 13:11:11 2007 UTC vs. Revision 1.139 by root, Sun Nov 25 09:24:37 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.36 by root, Thu Nov 1 13:11:11 2007 UTC vs.
Revision 1.139 by root, Sun Nov 25 09:24:37 2007 UTC