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Comparing libev/ev.c (file contents):
Revision 1.33 by root, Thu Nov 1 11:11:22 2007 UTC vs.
Revision 1.144 by root, Tue Nov 27 08:11:52 2007 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
…		…
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (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
27	* 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.
28	*/	30	*/
		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
29	#if EV_USE_CONFIG_H	37	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
30	# 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
31	#endif	99	#endif
32		100
33	#include <math.h>	101	#include <math.h>
34	#include <stdlib.h>	102	#include <stdlib.h>
35	#include <unistd.h>
36	#include <fcntl.h>	103	#include <fcntl.h>
37	#include <signal.h>
38	#include <stddef.h>	104	#include <stddef.h>
39		105
40	#include <stdio.h>	106	#include <stdio.h>
41		107
42	#include <assert.h>	108	#include <assert.h>
43	#include <errno.h>	109	#include <errno.h>
44	#include <sys/types.h>	110	#include <sys/types.h>
45	#include <sys/wait.h>
46	#include <sys/time.h>
47	#include <time.h>	111	#include <time.h>
48		112
		113	#include <signal.h>
		114
		115	#ifndef _WIN32
		116	# include <sys/time.h>
		117	# include <sys/wait.h>
		118	# include <unistd.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
49	#ifndef EV_USE_MONOTONIC	129	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	130	# define EV_USE_MONOTONIC 0
52	# endif	131	#endif
		132
		133	#ifndef EV_USE_REALTIME
		134	# define EV_USE_REALTIME 0
53	#endif	135	#endif
54		136
55	#ifndef EV_USE_SELECT	137	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	138	# define EV_USE_SELECT 1
57	#endif	139	#endif
58		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
59	#ifndef EV_USE_EPOLL	149	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	150	# define EV_USE_EPOLL 0
61	#endif	151	#endif
62		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
63	#ifndef CLOCK_REALTIME	168	#ifndef CLOCK_REALTIME
		169	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	170	# define EV_USE_REALTIME 0
65	#endif	171	#endif
66	#ifndef EV_USE_REALTIME	172
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
68	#endif	175	#endif
		176
		177	/**/
69		178
70	#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) */
71	#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) */
72	#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 */
73	#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 */
74		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
75	#include "ev.h"	187	# include "ev.h"
		188	#endif
76		189
		190	#if __GNUC__ >= 3
		191	# define expect(expr,value) __builtin_expect ((expr),(value))
		192	# define inline_size static inline /* inline for codesize */
		193	# if EV_MINIMAL
		194	# define noinline __attribute__ ((noinline))
		195	# define inline_speed static noinline
		196	# else
		197	# define noinline
		198	# define inline_speed static inline
		199	# endif
		200	#else
		201	# define expect(expr,value) (expr)
		202	# define inline_speed static
		203	# define inline_minimal static
		204	# define noinline
		205	#endif
		206
		207	#define expect_false(expr) expect ((expr) != 0, 0)
		208	#define expect_true(expr) expect ((expr) != 0, 1)
		209
		210	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		211	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		212
		213	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		214	#define EMPTY2(a,b) /* used to suppress some warnings */
		215
77	typedef struct ev_watcher *W;	216	typedef ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	217	typedef ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	218	typedef ev_watcher_time *WT;
80		219
81	static ev_tstamp now, diff; /* monotonic clock */	220	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		221
		222	#ifdef _WIN32
		223	# include "ev_win32.c"
		224	#endif
		225
		226	/*****************************************************************************/
		227
		228	static void (*syserr_cb)(const char *msg);
		229
		230	void
		231	ev_set_syserr_cb (void (*cb)(const char *msg))
		232	{
		233	syserr_cb = cb;
		234	}
		235
		236	static void noinline
		237	syserr (const char *msg)
		238	{
		239	if (!msg)
		240	msg = "(libev) system error";
		241
		242	if (syserr_cb)
		243	syserr_cb (msg);
		244	else
		245	{
		246	perror (msg);
		247	abort ();
		248	}
		249	}
		250
		251	static void *(*alloc)(void *ptr, long size);
		252
		253	void
		254	ev_set_allocator (void *(*cb)(void *ptr, long size))
		255	{
		256	alloc = cb;
		257	}
		258
		259	static void *
		260	ev_realloc (void *ptr, long size)
		261	{
		262	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		263
		264	if (!ptr && size)
		265	{
		266	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		267	abort ();
		268	}
		269
		270	return ptr;
		271	}
		272
		273	#define ev_malloc(size) ev_realloc (0, (size))
		274	#define ev_free(ptr) ev_realloc ((ptr), 0)
		275
		276	/*****************************************************************************/
		277
		278	typedef struct
		279	{
		280	WL head;
		281	unsigned char events;
		282	unsigned char reify;
		283	#if EV_SELECT_IS_WINSOCKET
		284	SOCKET handle;
		285	#endif
		286	} ANFD;
		287
		288	typedef struct
		289	{
		290	W w;
		291	int events;
		292	} ANPENDING;
		293
		294	#if EV_MULTIPLICITY
		295
		296	struct ev_loop
		297	{
		298	ev_tstamp ev_rt_now;
		299	#define ev_rt_now ((loop)->ev_rt_now)
		300	#define VAR(name,decl) decl;
		301	#include "ev_vars.h"
		302	#undef VAR
		303	};
		304	#include "ev_wrap.h"
		305
		306	static struct ev_loop default_loop_struct;
		307	struct ev_loop *ev_default_loop_ptr;
		308
		309	#else
		310
82	ev_tstamp ev_now;	311	ev_tstamp ev_rt_now;
83	int ev_method;	312	#define VAR(name,decl) static decl;
		313	#include "ev_vars.h"
		314	#undef VAR
84		315
85	static int have_monotonic; /* runtime */	316	static int ev_default_loop_ptr;
86		317
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	318	#endif
88	static void (*method_modify)(int fd, int oev, int nev);
89	static void (*method_poll)(ev_tstamp timeout);
90		319
91	/*****************************************************************************/	320	/*****************************************************************************/
92		321
93	ev_tstamp	322	ev_tstamp
94	ev_time (void)	323	ev_time (void)
…		…
102	gettimeofday (&tv, 0);	331	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	332	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	333	#endif
105	}	334	}
106		335
107	static ev_tstamp	336	ev_tstamp inline_size
108	get_clock (void)	337	get_clock (void)
109	{	338	{
110	#if EV_USE_MONOTONIC	339	#if EV_USE_MONOTONIC
111	if (have_monotonic)	340	if (expect_true (have_monotonic))
112	{	341	{
113	struct timespec ts;	342	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	343	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	344	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	345	}
117	#endif	346	#endif
118		347
119	return ev_time ();	348	return ev_time ();
120	}	349	}
121		350
		351	#if EV_MULTIPLICITY
		352	ev_tstamp
		353	ev_now (EV_P)
		354	{
		355	return ev_rt_now;
		356	}
		357	#endif
		358
122	#define array_roundsize(base,n) ((n) | 4 & ~3)	359	#define array_roundsize(type,n) (((n) | 4) & ~3)
123		360
124	#define array_needsize(base,cur,cnt,init) \	361	#define array_needsize(type,base,cur,cnt,init) \
125	if ((cnt) > cur) \	362	if (expect_false ((cnt) > cur)) \
126	{ \	363	{ \
127	int newcnt = cur; \	364	int newcnt = cur; \
128	do \	365	do \
129	{ \	366	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	367	newcnt = array_roundsize (type, newcnt << 1); \
131	} \	368	} \
132	while ((cnt) > newcnt); \	369	while ((cnt) > newcnt); \
133	\	370	\
134	base = realloc (base, sizeof (*base) * (newcnt)); \	371	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
135	init (base + cur, newcnt - cur); \	372	init (base + cur, newcnt - cur); \
136	cur = newcnt; \	373	cur = newcnt; \
137	}	374	}
		375
		376	#define array_slim(type,stem) \
		377	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		378	{ \
		379	stem ## max = array_roundsize (stem ## cnt >> 1); \
		380	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		381	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		382	}
		383
		384	#define array_free(stem, idx) \
		385	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
138		386
139	/*****************************************************************************/	387	/*****************************************************************************/
140		388
141	typedef struct	389	void noinline
		390	ev_feed_event (EV_P_ void *w, int revents)
142	{	391	{
143	struct ev_io *head;	392	W w_ = (W)w;
144	unsigned char events;
145	unsigned char reify;
146	} ANFD;
147		393
148	static ANFD *anfds;	394	if (expect_false (w_->pending))
149	static int anfdmax;	395	{
		396	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		397	return;
		398	}
150		399
151	static void	400	w_->pending = ++pendingcnt [ABSPRI (w_)];
		401	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		402	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		403	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		404	}
		405
		406	void inline_size
		407	queue_events (EV_P_ W *events, int eventcnt, int type)
		408	{
		409	int i;
		410
		411	for (i = 0; i < eventcnt; ++i)
		412	ev_feed_event (EV_A_ events [i], type);
		413	}
		414
		415	/*****************************************************************************/
		416
		417	void inline_size
152	anfds_init (ANFD *base, int count)	418	anfds_init (ANFD *base, int count)
153	{	419	{
154	while (count--)	420	while (count--)
155	{	421	{
156	base->head = 0;	422	base->head = 0;
…		…
159		425
160	++base;	426	++base;
161	}	427	}
162	}	428	}
163		429
164	typedef struct	430	void inline_speed
165	{
166	W w;
167	int events;
168	} ANPENDING;
169
170	static ANPENDING *pendings;
171	static int pendingmax, pendingcnt;
172
173	static void
174	event (W w, int events)
175	{
176	if (w->pending)
177	{
178	pendings [w->pending - 1].events |= events;
179	return;
180	}
181
182	w->pending = ++pendingcnt;
183	array_needsize (pendings, pendingmax, pendingcnt, );
184	pendings [pendingcnt - 1].w = w;
185	pendings [pendingcnt - 1].events = events;
186	}
187
188	static void
189	queue_events (W *events, int eventcnt, int type)
190	{
191	int i;
192
193	for (i = 0; i < eventcnt; ++i)
194	event (events [i], type);
195	}
196
197	static void
198	fd_event (int fd, int events)	431	fd_event (EV_P_ int fd, int revents)
199	{	432	{
200	ANFD *anfd = anfds + fd;	433	ANFD *anfd = anfds + fd;
201	struct ev_io *w;	434	ev_io *w;
202		435
203	for (w = anfd->head; w; w = w->next)	436	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
204	{	437	{
205	int ev = w->events & events;	438	int ev = w->events & revents;
206		439
207	if (ev)	440	if (ev)
208	event ((W)w, ev);	441	ev_feed_event (EV_A_ (W)w, ev);
209	}	442	}
210	}	443	}
211		444
212	/*****************************************************************************/	445	void
		446	ev_feed_fd_event (EV_P_ int fd, int revents)
		447	{
		448	fd_event (EV_A_ fd, revents);
		449	}
213		450
214	static int *fdchanges;	451	void inline_size
215	static int fdchangemax, fdchangecnt;	452	fd_reify (EV_P)
216
217	static void
218	fd_reify (void)
219	{	453	{
220	int i;	454	int i;
221		455
222	for (i = 0; i < fdchangecnt; ++i)	456	for (i = 0; i < fdchangecnt; ++i)
223	{	457	{
224	int fd = fdchanges [i];	458	int fd = fdchanges [i];
225	ANFD *anfd = anfds + fd;	459	ANFD *anfd = anfds + fd;
226	struct ev_io *w;	460	ev_io *w;
227		461
228	int events = 0;	462	int events = 0;
229		463
230	for (w = anfd->head; w; w = w->next)	464	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
231	events |= w->events;	465	events |= w->events;
232		466
		467	#if EV_SELECT_IS_WINSOCKET
		468	if (events)
		469	{
		470	unsigned long argp;
		471	anfd->handle = _get_osfhandle (fd);
		472	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		473	}
		474	#endif
		475
233	anfd->reify = 0;	476	anfd->reify = 0;
234		477
235	if (anfd->events != events)
236	{
237	method_modify (fd, anfd->events, events);	478	backend_modify (EV_A_ fd, anfd->events, events);
238	anfd->events = events;	479	anfd->events = events;
239	}
240	}	480	}
241		481
242	fdchangecnt = 0;	482	fdchangecnt = 0;
243	}	483	}
244		484
245	static void	485	void inline_size
246	fd_change (int fd)	486	fd_change (EV_P_ int fd)
247	{	487	{
248	if (anfds [fd].reify || fdchangecnt < 0)	488	if (expect_false (anfds [fd].reify))
249	return;	489	return;
250		490
251	anfds [fd].reify = 1;	491	anfds [fd].reify = 1;
252		492
253	++fdchangecnt;	493	++fdchangecnt;
254	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	494	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
255	fdchanges [fdchangecnt - 1] = fd;	495	fdchanges [fdchangecnt - 1] = fd;
256	}	496	}
257		497
		498	void inline_speed
		499	fd_kill (EV_P_ int fd)
		500	{
		501	ev_io *w;
		502
		503	while ((w = (ev_io *)anfds [fd].head))
		504	{
		505	ev_io_stop (EV_A_ w);
		506	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		507	}
		508	}
		509
		510	int inline_size
		511	fd_valid (int fd)
		512	{
		513	#ifdef _WIN32
		514	return _get_osfhandle (fd) != -1;
		515	#else
		516	return fcntl (fd, F_GETFD) != -1;
		517	#endif
		518	}
		519
258	/* called on EBADF to verify fds */	520	/* called on EBADF to verify fds */
259	static void	521	static void noinline
260	fd_recheck (void)	522	fd_ebadf (EV_P)
261	{	523	{
262	int fd;	524	int fd;
263		525
264	for (fd = 0; fd < anfdmax; ++fd)	526	for (fd = 0; fd < anfdmax; ++fd)
265	if (anfds [fd].events)	527	if (anfds [fd].events)
266	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	528	if (!fd_valid (fd) == -1 && errno == EBADF)
267	while (anfds [fd].head)	529	fd_kill (EV_A_ fd);
		530	}
		531
		532	/* called on ENOMEM in select/poll to kill some fds and retry */
		533	static void noinline
		534	fd_enomem (EV_P)
		535	{
		536	int fd;
		537
		538	for (fd = anfdmax; fd--; )
		539	if (anfds [fd].events)
268	{	540	{
269	ev_io_stop (anfds [fd].head);	541	fd_kill (EV_A_ fd);
270	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	542	return;
271	}	543	}
		544	}
		545
		546	/* usually called after fork if backend needs to re-arm all fds from scratch */
		547	static void noinline
		548	fd_rearm_all (EV_P)
		549	{
		550	int fd;
		551
		552	/* this should be highly optimised to not do anything but set a flag */
		553	for (fd = 0; fd < anfdmax; ++fd)
		554	if (anfds [fd].events)
		555	{
		556	anfds [fd].events = 0;
		557	fd_change (EV_A_ fd);
		558	}
272	}	559	}
273		560
274	/*****************************************************************************/	561	/*****************************************************************************/
275		562
276	static struct ev_timer **timers;	563	void inline_speed
277	static int timermax, timercnt;
278
279	static struct ev_periodic **periodics;
280	static int periodicmax, periodiccnt;
281
282	static void
283	upheap (WT *timers, int k)	564	upheap (WT *heap, int k)
284	{	565	{
285	WT w = timers [k];	566	WT w = heap [k];
286		567
287	while (k && timers [k >> 1]->at > w->at)	568	while (k && heap [k >> 1]->at > w->at)
288	{	569	{
289	timers [k] = timers [k >> 1];	570	heap [k] = heap [k >> 1];
290	timers [k]->active = k + 1;	571	((W)heap [k])->active = k + 1;
291	k >>= 1;	572	k >>= 1;
292	}	573	}
293		574
294	timers [k] = w;	575	heap [k] = w;
295	timers [k]->active = k + 1;	576	((W)heap [k])->active = k + 1;
296		577
297	}	578	}
298		579
299	static void	580	void inline_speed
300	downheap (WT *timers, int N, int k)	581	downheap (WT *heap, int N, int k)
301	{	582	{
302	WT w = timers [k];	583	WT w = heap [k];
303		584
304	while (k < (N >> 1))	585	while (k < (N >> 1))
305	{	586	{
306	int j = k << 1;	587	int j = k << 1;
307		588
308	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	589	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
309	++j;	590	++j;
310		591
311	if (w->at <= timers [j]->at)	592	if (w->at <= heap [j]->at)
312	break;	593	break;
313		594
314	timers [k] = timers [j];	595	heap [k] = heap [j];
315	timers [k]->active = k + 1;	596	((W)heap [k])->active = k + 1;
316	k = j;	597	k = j;
317	}	598	}
318		599
319	timers [k] = w;	600	heap [k] = w;
320	timers [k]->active = k + 1;	601	((W)heap [k])->active = k + 1;
		602	}
		603
		604	void inline_size
		605	adjustheap (WT *heap, int N, int k)
		606	{
		607	upheap (heap, k);
		608	downheap (heap, N, k);
321	}	609	}
322		610
323	/*****************************************************************************/	611	/*****************************************************************************/
324		612
325	typedef struct	613	typedef struct
326	{	614	{
327	struct ev_signal *head;	615	WL head;
328	sig_atomic_t gotsig;	616	sig_atomic_t volatile gotsig;
329	} ANSIG;	617	} ANSIG;
330		618
331	static ANSIG *signals;	619	static ANSIG *signals;
332	static int signalmax;	620	static int signalmax;
333		621
334	static int sigpipe [2];	622	static int sigpipe [2];
335	static sig_atomic_t gotsig;	623	static sig_atomic_t volatile gotsig;
336	static struct ev_io sigev;	624	static ev_io sigev;
337		625
338	static void	626	void inline_size
339	signals_init (ANSIG *base, int count)	627	signals_init (ANSIG *base, int count)
340	{	628	{
341	while (count--)	629	while (count--)
342	{	630	{
343	base->head = 0;	631	base->head = 0;
…		…
348	}	636	}
349		637
350	static void	638	static void
351	sighandler (int signum)	639	sighandler (int signum)
352	{	640	{
		641	#if _WIN32
		642	signal (signum, sighandler);
		643	#endif
		644
353	signals [signum - 1].gotsig = 1;	645	signals [signum - 1].gotsig = 1;
354		646
355	if (!gotsig)	647	if (!gotsig)
356	{	648	{
		649	int old_errno = errno;
357	gotsig = 1;	650	gotsig = 1;
358	write (sigpipe [1], &gotsig, 1);	651	write (sigpipe [1], &signum, 1);
		652	errno = old_errno;
359	}	653	}
		654	}
		655
		656	void noinline
		657	ev_feed_signal_event (EV_P_ int signum)
		658	{
		659	WL w;
		660
		661	#if EV_MULTIPLICITY
		662	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		663	#endif
		664
		665	--signum;
		666
		667	if (signum < 0 || signum >= signalmax)
		668	return;
		669
		670	signals [signum].gotsig = 0;
		671
		672	for (w = signals [signum].head; w; w = w->next)
		673	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
360	}	674	}
361		675
362	static void	676	static void
363	sigcb (struct ev_io *iow, int revents)	677	sigcb (EV_P_ ev_io *iow, int revents)
364	{	678	{
365	struct ev_signal *w;
366	int sig;	679	int signum;
367		680
		681	read (sigpipe [0], &revents, 1);
368	gotsig = 0;	682	gotsig = 0;
369	read (sigpipe [0], &revents, 1);
370		683
371	for (sig = signalmax; sig--; )	684	for (signum = signalmax; signum--; )
372	if (signals [sig].gotsig)	685	if (signals [signum].gotsig)
		686	ev_feed_signal_event (EV_A_ signum + 1);
		687	}
		688
		689	void inline_size
		690	fd_intern (int fd)
		691	{
		692	#ifdef _WIN32
		693	int arg = 1;
		694	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		695	#else
		696	fcntl (fd, F_SETFD, FD_CLOEXEC);
		697	fcntl (fd, F_SETFL, O_NONBLOCK);
		698	#endif
		699	}
		700
		701	static void noinline
		702	siginit (EV_P)
		703	{
		704	fd_intern (sigpipe [0]);
		705	fd_intern (sigpipe [1]);
		706
		707	ev_io_set (&sigev, sigpipe [0], EV_READ);
		708	ev_io_start (EV_A_ &sigev);
		709	ev_unref (EV_A); /* child watcher should not keep loop alive */
		710	}
		711
		712	/*****************************************************************************/
		713
		714	static ev_child *childs [PID_HASHSIZE];
		715
		716	#ifndef _WIN32
		717
		718	static ev_signal childev;
		719
		720	void inline_speed
		721	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		722	{
		723	ev_child *w;
		724
		725	for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		726	if (w->pid == pid || !w->pid)
373	{	727	{
374	signals [sig].gotsig = 0;	728	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
375		729	w->rpid = pid;
376	for (w = signals [sig].head; w; w = w->next)	730	w->rstatus = status;
377	event ((W)w, EV_SIGNAL);	731	ev_feed_event (EV_A_ (W)w, EV_CHILD);
378	}	732	}
379	}	733	}
380
381	static void
382	siginit (void)
383	{
384	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
385	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
386
387	/* rather than sort out wether we really need nb, set it */
388	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
389	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
390
391	ev_io_set (&sigev, sigpipe [0], EV_READ);
392	ev_io_start (&sigev);
393	}
394
395	/*****************************************************************************/
396
397	static struct ev_idle **idles;
398	static int idlemax, idlecnt;
399
400	static struct ev_prepare **prepares;
401	static int preparemax, preparecnt;
402
403	static struct ev_check **checks;
404	static int checkmax, checkcnt;
405
406	/*****************************************************************************/
407
408	static struct ev_child *childs [PID_HASHSIZE];
409	static struct ev_signal childev;
410		734
411	#ifndef WCONTINUED	735	#ifndef WCONTINUED
412	# define WCONTINUED 0	736	# define WCONTINUED 0
413	#endif	737	#endif
414		738
415	static void	739	static void
416	childcb (struct ev_signal *sw, int revents)	740	childcb (EV_P_ ev_signal *sw, int revents)
417	{	741	{
418	struct ev_child *w;
419	int pid, status;	742	int pid, status;
420		743
		744	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
421	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	745	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
422	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	746	if (!WCONTINUED
423	if (w->pid == pid || w->pid == -1)	747	|| errno != EINVAL
424	{	748	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
425	w->status = status;	749	return;
426	event ((W)w, EV_CHILD);	750
427	}	751	/* make sure we are called again until all childs have been reaped */
		752	/* we need to do it this way so that the callback gets called before we continue */
		753	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		754
		755	child_reap (EV_A_ sw, pid, pid, status);
		756	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
428	}	757	}
		758
		759	#endif
429		760
430	/*****************************************************************************/	761	/*****************************************************************************/
431		762
		763	#if EV_USE_PORT
		764	# include "ev_port.c"
		765	#endif
		766	#if EV_USE_KQUEUE
		767	# include "ev_kqueue.c"
		768	#endif
432	#if EV_USE_EPOLL	769	#if EV_USE_EPOLL
433	# include "ev_epoll.c"	770	# include "ev_epoll.c"
434	#endif	771	#endif
		772	#if EV_USE_POLL
		773	# include "ev_poll.c"
		774	#endif
435	#if EV_USE_SELECT	775	#if EV_USE_SELECT
436	# include "ev_select.c"	776	# include "ev_select.c"
437	#endif	777	#endif
438		778
439	int	779	int
…		…
446	ev_version_minor (void)	786	ev_version_minor (void)
447	{	787	{
448	return EV_VERSION_MINOR;	788	return EV_VERSION_MINOR;
449	}	789	}
450		790
451	int ev_init (int flags)	791	/* return true if we are running with elevated privileges and should ignore env variables */
		792	int inline_size
		793	enable_secure (void)
452	{	794	{
453	if (!ev_method)	795	#ifdef _WIN32
		796	return 0;
		797	#else
		798	return getuid () != geteuid ()
		799	|| getgid () != getegid ();
		800	#endif
		801	}
		802
		803	unsigned int
		804	ev_supported_backends (void)
		805	{
		806	unsigned int flags = 0;
		807
		808	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		809	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		810	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		811	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		812	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		813
		814	return flags;
		815	}
		816
		817	unsigned int
		818	ev_recommended_backends (void)
		819	{
		820	unsigned int flags = ev_supported_backends ();
		821
		822	#ifndef __NetBSD__
		823	/* kqueue is borked on everything but netbsd apparently */
		824	/* it usually doesn't work correctly on anything but sockets and pipes */
		825	flags &= ~EVBACKEND_KQUEUE;
		826	#endif
		827	#ifdef __APPLE__
		828	// flags &= ~EVBACKEND_KQUEUE; for documentation
		829	flags &= ~EVBACKEND_POLL;
		830	#endif
		831
		832	return flags;
		833	}
		834
		835	unsigned int
		836	ev_embeddable_backends (void)
		837	{
		838	return EVBACKEND_EPOLL
		839	| EVBACKEND_KQUEUE
		840	| EVBACKEND_PORT;
		841	}
		842
		843	unsigned int
		844	ev_backend (EV_P)
		845	{
		846	return backend;
		847	}
		848
		849	static void
		850	loop_init (EV_P_ unsigned int flags)
		851	{
		852	if (!backend)
454	{	853	{
455	#if EV_USE_MONOTONIC	854	#if EV_USE_MONOTONIC
456	{	855	{
457	struct timespec ts;	856	struct timespec ts;
458	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	857	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
459	have_monotonic = 1;	858	have_monotonic = 1;
460	}	859	}
461	#endif	860	#endif
462		861
463	ev_now = ev_time ();	862	ev_rt_now = ev_time ();
464	now = get_clock ();	863	mn_now = get_clock ();
		864	now_floor = mn_now;
465	diff = ev_now - now;	865	rtmn_diff = ev_rt_now - mn_now;
466		866
467	if (pipe (sigpipe))	867	if (!(flags & EVFLAG_NOENV)
468	return 0;	868	&& !enable_secure ()
		869	&& getenv ("LIBEV_FLAGS"))
		870	flags = atoi (getenv ("LIBEV_FLAGS"));
469		871
470	ev_method = EVMETHOD_NONE;	872	if (!(flags & 0x0000ffffUL))
		873	flags |= ev_recommended_backends ();
		874
		875	backend = 0;
		876	#if EV_USE_PORT
		877	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		878	#endif
		879	#if EV_USE_KQUEUE
		880	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		881	#endif
471	#if EV_USE_EPOLL	882	#if EV_USE_EPOLL
472	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	883	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		884	#endif
		885	#if EV_USE_POLL
		886	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
473	#endif	887	#endif
474	#if EV_USE_SELECT	888	#if EV_USE_SELECT
475	if (ev_method == EVMETHOD_NONE) select_init (flags);	889	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
476	#endif	890	#endif
477		891
478	if (ev_method)	892	ev_init (&sigev, sigcb);
		893	ev_set_priority (&sigev, EV_MAXPRI);
		894	}
		895	}
		896
		897	static void
		898	loop_destroy (EV_P)
		899	{
		900	int i;
		901
		902	#if EV_USE_PORT
		903	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		904	#endif
		905	#if EV_USE_KQUEUE
		906	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		907	#endif
		908	#if EV_USE_EPOLL
		909	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		910	#endif
		911	#if EV_USE_POLL
		912	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		913	#endif
		914	#if EV_USE_SELECT
		915	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		916	#endif
		917
		918	for (i = NUMPRI; i--; )
		919	array_free (pending, [i]);
		920
		921	/* have to use the microsoft-never-gets-it-right macro */
		922	array_free (fdchange, EMPTY0);
		923	array_free (timer, EMPTY0);
		924	#if EV_PERIODIC_ENABLE
		925	array_free (periodic, EMPTY0);
		926	#endif
		927	array_free (idle, EMPTY0);
		928	array_free (prepare, EMPTY0);
		929	array_free (check, EMPTY0);
		930
		931	backend = 0;
		932	}
		933
		934	static void
		935	loop_fork (EV_P)
		936	{
		937	#if EV_USE_PORT
		938	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		939	#endif
		940	#if EV_USE_KQUEUE
		941	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		942	#endif
		943	#if EV_USE_EPOLL
		944	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		945	#endif
		946
		947	if (ev_is_active (&sigev))
		948	{
		949	/* default loop */
		950
		951	ev_ref (EV_A);
		952	ev_io_stop (EV_A_ &sigev);
		953	close (sigpipe [0]);
		954	close (sigpipe [1]);
		955
		956	while (pipe (sigpipe))
		957	syserr ("(libev) error creating pipe");
		958
		959	siginit (EV_A);
		960	}
		961
		962	postfork = 0;
		963	}
		964
		965	#if EV_MULTIPLICITY
		966	struct ev_loop *
		967	ev_loop_new (unsigned int flags)
		968	{
		969	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		970
		971	memset (loop, 0, sizeof (struct ev_loop));
		972
		973	loop_init (EV_A_ flags);
		974
		975	if (ev_backend (EV_A))
		976	return loop;
		977
		978	return 0;
		979	}
		980
		981	void
		982	ev_loop_destroy (EV_P)
		983	{
		984	loop_destroy (EV_A);
		985	ev_free (loop);
		986	}
		987
		988	void
		989	ev_loop_fork (EV_P)
		990	{
		991	postfork = 1;
		992	}
		993
		994	#endif
		995
		996	#if EV_MULTIPLICITY
		997	struct ev_loop *
		998	ev_default_loop_init (unsigned int flags)
		999	#else
		1000	int
		1001	ev_default_loop (unsigned int flags)
		1002	#endif
		1003	{
		1004	if (sigpipe [0] == sigpipe [1])
		1005	if (pipe (sigpipe))
		1006	return 0;
		1007
		1008	if (!ev_default_loop_ptr)
		1009	{
		1010	#if EV_MULTIPLICITY
		1011	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1012	#else
		1013	ev_default_loop_ptr = 1;
		1014	#endif
		1015
		1016	loop_init (EV_A_ flags);
		1017
		1018	if (ev_backend (EV_A))
479	{	1019	{
480	ev_watcher_init (&sigev, sigcb);
481	siginit ();	1020	siginit (EV_A);
482		1021
		1022	#ifndef _WIN32
483	ev_signal_init (&childev, childcb, SIGCHLD);	1023	ev_signal_init (&childev, childcb, SIGCHLD);
		1024	ev_set_priority (&childev, EV_MAXPRI);
484	ev_signal_start (&childev);	1025	ev_signal_start (EV_A_ &childev);
		1026	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1027	#endif
485	}	1028	}
		1029	else
		1030	ev_default_loop_ptr = 0;
486	}	1031	}
487		1032
488	return ev_method;	1033	return ev_default_loop_ptr;
		1034	}
		1035
		1036	void
		1037	ev_default_destroy (void)
		1038	{
		1039	#if EV_MULTIPLICITY
		1040	struct ev_loop *loop = ev_default_loop_ptr;
		1041	#endif
		1042
		1043	#ifndef _WIN32
		1044	ev_ref (EV_A); /* child watcher */
		1045	ev_signal_stop (EV_A_ &childev);
		1046	#endif
		1047
		1048	ev_ref (EV_A); /* signal watcher */
		1049	ev_io_stop (EV_A_ &sigev);
		1050
		1051	close (sigpipe [0]); sigpipe [0] = 0;
		1052	close (sigpipe [1]); sigpipe [1] = 0;
		1053
		1054	loop_destroy (EV_A);
		1055	}
		1056
		1057	void
		1058	ev_default_fork (void)
		1059	{
		1060	#if EV_MULTIPLICITY
		1061	struct ev_loop *loop = ev_default_loop_ptr;
		1062	#endif
		1063
		1064	if (backend)
		1065	postfork = 1;
489	}	1066	}
490		1067
491	/*****************************************************************************/	1068	/*****************************************************************************/
492		1069
493	void	1070	int inline_size
494	ev_prefork (void)	1071	any_pending (EV_P)
495	{	1072	{
496	/* nop */	1073	int pri;
497	}
498		1074
499	void	1075	for (pri = NUMPRI; pri--; )
500	ev_postfork_parent (void)	1076	if (pendingcnt [pri])
501	{	1077	return 1;
502	/* nop */
503	}
504		1078
505	void	1079	return 0;
506	ev_postfork_child (void)
507	{
508	#if EV_USE_EPOLL
509	if (ev_method == EVMETHOD_EPOLL)
510	epoll_postfork_child ();
511	#endif
512
513	ev_io_stop (&sigev);
514	close (sigpipe [0]);
515	close (sigpipe [1]);
516	pipe (sigpipe);
517	siginit ();
518	}	1080	}
519		1081
520	/*****************************************************************************/	1082	void inline_speed
521
522	static void
523	call_pending (void)	1083	call_pending (EV_P)
524	{	1084	{
		1085	int pri;
		1086
		1087	for (pri = NUMPRI; pri--; )
525	while (pendingcnt)	1088	while (pendingcnt [pri])
526	{	1089	{
527	ANPENDING *p = pendings + --pendingcnt;	1090	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
528		1091
529	if (p->w)	1092	if (expect_true (p->w))
530	{	1093	{
		1094	assert (("non-pending watcher on pending list", p->w->pending));
		1095
531	p->w->pending = 0;	1096	p->w->pending = 0;
532	p->w->cb (p->w, p->events);	1097	EV_CB_INVOKE (p->w, p->events);
533	}	1098	}
534	}	1099	}
535	}	1100	}
536		1101
537	static void	1102	void inline_size
538	timers_reify (void)	1103	timers_reify (EV_P)
539	{	1104	{
540	while (timercnt && timers [0]->at <= now)	1105	while (timercnt && ((WT)timers [0])->at <= mn_now)
541	{	1106	{
542	struct ev_timer *w = timers [0];	1107	ev_timer *w = timers [0];
		1108
		1109	assert (("inactive timer on timer heap detected", ev_is_active (w)));
543		1110
544	/* first reschedule or stop timer */	1111	/* first reschedule or stop timer */
545	if (w->repeat)	1112	if (w->repeat)
546	{	1113	{
547	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1114	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1115
548	w->at = now + w->repeat;	1116	((WT)w)->at += w->repeat;
		1117	if (((WT)w)->at < mn_now)
		1118	((WT)w)->at = mn_now;
		1119
549	downheap ((WT *)timers, timercnt, 0);	1120	downheap ((WT *)timers, timercnt, 0);
550	}	1121	}
551	else	1122	else
552	ev_timer_stop (w); /* nonrepeating: stop timer */	1123	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
553		1124
554	event ((W)w, EV_TIMEOUT);	1125	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
555	}	1126	}
556	}	1127	}
557		1128
558	static void	1129	#if EV_PERIODIC_ENABLE
		1130	void inline_size
559	periodics_reify (void)	1131	periodics_reify (EV_P)
560	{	1132	{
561	while (periodiccnt && periodics [0]->at <= ev_now)	1133	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
562	{	1134	{
563	struct ev_periodic *w = periodics [0];	1135	ev_periodic *w = periodics [0];
		1136
		1137	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
564		1138
565	/* first reschedule or stop timer */	1139	/* first reschedule or stop timer */
566	if (w->interval)	1140	if (w->reschedule_cb)
567	{	1141	{
		1142	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1143	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1144	downheap ((WT *)periodics, periodiccnt, 0);
		1145	}
		1146	else if (w->interval)
		1147	{
568	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1148	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
569	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	1149	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
570	downheap ((WT *)periodics, periodiccnt, 0);	1150	downheap ((WT *)periodics, periodiccnt, 0);
571	}	1151	}
572	else	1152	else
573	ev_periodic_stop (w); /* nonrepeating: stop timer */	1153	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
574		1154
575	event ((W)w, EV_PERIODIC);	1155	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
576	}	1156	}
577	}	1157	}
578		1158
579	static void	1159	static void noinline
580	periodics_reschedule (ev_tstamp diff)	1160	periodics_reschedule (EV_P)
581	{	1161	{
582	int i;	1162	int i;
583		1163
584	/* adjust periodics after time jump */	1164	/* adjust periodics after time jump */
585	for (i = 0; i < periodiccnt; ++i)	1165	for (i = 0; i < periodiccnt; ++i)
586	{	1166	{
587	struct ev_periodic *w = periodics [i];	1167	ev_periodic *w = periodics [i];
588		1168
		1169	if (w->reschedule_cb)
		1170	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
589	if (w->interval)	1171	else if (w->interval)
		1172	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1173	}
		1174
		1175	/* now rebuild the heap */
		1176	for (i = periodiccnt >> 1; i--; )
		1177	downheap ((WT *)periodics, periodiccnt, i);
		1178	}
		1179	#endif
		1180
		1181	int inline_size
		1182	time_update_monotonic (EV_P)
		1183	{
		1184	mn_now = get_clock ();
		1185
		1186	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1187	{
		1188	ev_rt_now = rtmn_diff + mn_now;
		1189	return 0;
		1190	}
		1191	else
		1192	{
		1193	now_floor = mn_now;
		1194	ev_rt_now = ev_time ();
		1195	return 1;
		1196	}
		1197	}
		1198
		1199	void inline_size
		1200	time_update (EV_P)
		1201	{
		1202	int i;
		1203
		1204	#if EV_USE_MONOTONIC
		1205	if (expect_true (have_monotonic))
		1206	{
		1207	if (time_update_monotonic (EV_A))
590	{	1208	{
591	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1209	ev_tstamp odiff = rtmn_diff;
592		1210
593	if (fabs (diff) >= 1e-4)	1211	/* loop a few times, before making important decisions.
		1212	* on the choice of "4": one iteration isn't enough,
		1213	* in case we get preempted during the calls to
		1214	* ev_time and get_clock. a second call is almost guarenteed
		1215	* to succeed in that case, though. and looping a few more times
		1216	* doesn't hurt either as we only do this on time-jumps or
		1217	* in the unlikely event of getting preempted here.
		1218	*/
		1219	for (i = 4; --i; )
594	{	1220	{
595	ev_periodic_stop (w);	1221	rtmn_diff = ev_rt_now - mn_now;
596	ev_periodic_start (w);
597		1222
598	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1223	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1224	return; /* all is well */
		1225
		1226	ev_rt_now = ev_time ();
		1227	mn_now = get_clock ();
		1228	now_floor = mn_now;
599	}	1229	}
		1230
		1231	# if EV_PERIODIC_ENABLE
		1232	periodics_reschedule (EV_A);
		1233	# endif
		1234	/* no timer adjustment, as the monotonic clock doesn't jump */
		1235	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
600	}	1236	}
601	}	1237	}
602	}	1238	else
603		1239	#endif
604	static void	1240	{
605	time_update (void)
606	{
607	int i;
608
609	ev_now = ev_time ();	1241	ev_rt_now = ev_time ();
610		1242
611	if (have_monotonic)	1243	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
612	{
613	ev_tstamp odiff = diff;
614
615	for (i = 4; --i; ) /* loop a few times, before making important decisions */
616	{	1244	{
617	now = get_clock ();	1245	#if EV_PERIODIC_ENABLE
618	diff = ev_now - now;
619
620	if (fabs (odiff - diff) < MIN_TIMEJUMP)
621	return; /* all is well */
622
623	ev_now = ev_time ();
624	}
625
626	periodics_reschedule (diff - odiff);
627	/* no timer adjustment, as the monotonic clock doesn't jump */
628	}
629	else
630	{
631	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
632	{
633	periodics_reschedule (ev_now - now);	1246	periodics_reschedule (EV_A);
		1247	#endif
634		1248
635	/* adjust timers. this is easy, as the offset is the same for all */	1249	/* adjust timers. this is easy, as the offset is the same for all */
636	for (i = 0; i < timercnt; ++i)	1250	for (i = 0; i < timercnt; ++i)
637	timers [i]->at += diff;	1251	((WT)timers [i])->at += ev_rt_now - mn_now;
638	}	1252	}
639		1253
640	now = ev_now;	1254	mn_now = ev_rt_now;
641	}	1255	}
642	}	1256	}
643		1257
644	int ev_loop_done;	1258	void
		1259	ev_ref (EV_P)
		1260	{
		1261	++activecnt;
		1262	}
645		1263
		1264	void
		1265	ev_unref (EV_P)
		1266	{
		1267	--activecnt;
		1268	}
		1269
		1270	static int loop_done;
		1271
		1272	void
646	void ev_loop (int flags)	1273	ev_loop (EV_P_ int flags)
647	{	1274	{
648	double block;
649	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1275	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1276	? EVUNLOOP_ONE
		1277	: EVUNLOOP_CANCEL;
650		1278
651	do	1279	while (activecnt)
652	{	1280	{
653	/* queue check watchers (and execute them) */	1281	/* queue check watchers (and execute them) */
654	if (preparecnt)	1282	if (expect_false (preparecnt))
655	{	1283	{
656	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1284	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
657	call_pending ();	1285	call_pending (EV_A);
658	}	1286	}
659		1287
		1288	/* we might have forked, so reify kernel state if necessary */
		1289	if (expect_false (postfork))
		1290	loop_fork (EV_A);
		1291
660	/* update fd-related kernel structures */	1292	/* update fd-related kernel structures */
661	fd_reify ();	1293	fd_reify (EV_A);
662		1294
663	/* calculate blocking time */	1295	/* calculate blocking time */
		1296	{
		1297	double block;
664		1298
665	/* we only need this for !monotonic clockor timers, but as we basically
666	always have timers, we just calculate it always */
667	ev_now = ev_time ();
668
669	if (flags & EVLOOP_NONBLOCK || idlecnt)	1299	if (flags & EVLOOP_NONBLOCK || idlecnt)
670	block = 0.;	1300	block = 0.; /* do not block at all */
671	else	1301	else
672	{	1302	{
		1303	/* update time to cancel out callback processing overhead */
		1304	#if EV_USE_MONOTONIC
		1305	if (expect_true (have_monotonic))
		1306	time_update_monotonic (EV_A);
		1307	else
		1308	#endif
		1309	{
		1310	ev_rt_now = ev_time ();
		1311	mn_now = ev_rt_now;
		1312	}
		1313
673	block = MAX_BLOCKTIME;	1314	block = MAX_BLOCKTIME;
674		1315
675	if (timercnt)	1316	if (timercnt)
676	{	1317	{
677	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1318	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
678	if (block > to) block = to;	1319	if (block > to) block = to;
679	}	1320	}
680		1321
		1322	#if EV_PERIODIC_ENABLE
681	if (periodiccnt)	1323	if (periodiccnt)
682	{	1324	{
683	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1325	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
684	if (block > to) block = to;	1326	if (block > to) block = to;
685	}	1327	}
		1328	#endif
686		1329
687	if (block < 0.) block = 0.;	1330	if (expect_false (block < 0.)) block = 0.;
688	}	1331	}
689		1332
690	method_poll (block);	1333	backend_poll (EV_A_ block);
		1334	}
691		1335
692	/* update ev_now, do magic */	1336	/* update ev_rt_now, do magic */
693	time_update ();	1337	time_update (EV_A);
694		1338
695	/* queue pending timers and reschedule them */	1339	/* queue pending timers and reschedule them */
696	timers_reify (); /* relative timers called last */	1340	timers_reify (EV_A); /* relative timers called last */
		1341	#if EV_PERIODIC_ENABLE
697	periodics_reify (); /* absolute timers called first */	1342	periodics_reify (EV_A); /* absolute timers called first */
		1343	#endif
698		1344
699	/* queue idle watchers unless io or timers are pending */	1345	/* queue idle watchers unless other events are pending */
700	if (!pendingcnt)	1346	if (idlecnt && !any_pending (EV_A))
701	queue_events ((W *)idles, idlecnt, EV_IDLE);	1347	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
702		1348
703	/* queue check watchers, to be executed first */	1349	/* queue check watchers, to be executed first */
704	if (checkcnt)	1350	if (expect_false (checkcnt))
705	queue_events ((W *)checks, checkcnt, EV_CHECK);	1351	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
706		1352
707	call_pending ();	1353	call_pending (EV_A);
708	}
709	while (!ev_loop_done);
710		1354
711	if (ev_loop_done != 2)	1355	if (expect_false (loop_done))
		1356	break;
		1357	}
		1358
		1359	if (loop_done == EVUNLOOP_ONE)
		1360	loop_done = EVUNLOOP_CANCEL;
		1361	}
		1362
		1363	void
		1364	ev_unloop (EV_P_ int how)
		1365	{
712	ev_loop_done = 0;	1366	loop_done = how;
713	}	1367	}
714		1368
715	/*****************************************************************************/	1369	/*****************************************************************************/
716		1370
717	static void	1371	void inline_size
718	wlist_add (WL *head, WL elem)	1372	wlist_add (WL *head, WL elem)
719	{	1373	{
720	elem->next = *head;	1374	elem->next = *head;
721	*head = elem;	1375	*head = elem;
722	}	1376	}
723		1377
724	static void	1378	void inline_size
725	wlist_del (WL *head, WL elem)	1379	wlist_del (WL *head, WL elem)
726	{	1380	{
727	while (*head)	1381	while (*head)
728	{	1382	{
729	if (*head == elem)	1383	if (*head == elem)
…		…
734		1388
735	head = &(*head)->next;	1389	head = &(*head)->next;
736	}	1390	}
737	}	1391	}
738		1392
739	static void	1393	void inline_speed
740	ev_clear_pending (W w)	1394	ev_clear_pending (EV_P_ W w)
741	{	1395	{
742	if (w->pending)	1396	if (w->pending)
743	{	1397	{
744	pendings [w->pending - 1].w = 0;	1398	pendings [ABSPRI (w)][w->pending - 1].w = 0;
745	w->pending = 0;	1399	w->pending = 0;
746	}	1400	}
747	}	1401	}
748		1402
749	static void	1403	void inline_speed
750	ev_start (W w, int active)	1404	ev_start (EV_P_ W w, int active)
751	{	1405	{
		1406	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1407	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1408
752	w->active = active;	1409	w->active = active;
		1410	ev_ref (EV_A);
753	}	1411	}
754		1412
755	static void	1413	void inline_size
756	ev_stop (W w)	1414	ev_stop (EV_P_ W w)
757	{	1415	{
		1416	ev_unref (EV_A);
758	w->active = 0;	1417	w->active = 0;
759	}	1418	}
760		1419
761	/*****************************************************************************/	1420	/*****************************************************************************/
762		1421
763	void	1422	void
764	ev_io_start (struct ev_io *w)	1423	ev_io_start (EV_P_ ev_io *w)
765	{	1424	{
766	if (ev_is_active (w))
767	return;
768
769	int fd = w->fd;	1425	int fd = w->fd;
770		1426
		1427	if (expect_false (ev_is_active (w)))
		1428	return;
		1429
771	assert (("ev_io_start called with negative fd", fd >= 0));	1430	assert (("ev_io_start called with negative fd", fd >= 0));
772		1431
773	ev_start ((W)w, 1);	1432	ev_start (EV_A_ (W)w, 1);
774	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1433	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
775	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1434	wlist_add ((WL *)&anfds[fd].head, (WL)w);
776		1435
777	fd_change (fd);	1436	fd_change (EV_A_ fd);
778	}	1437	}
779		1438
780	void	1439	void
781	ev_io_stop (struct ev_io *w)	1440	ev_io_stop (EV_P_ ev_io *w)
782	{	1441	{
783	ev_clear_pending ((W)w);	1442	ev_clear_pending (EV_A_ (W)w);
784	if (!ev_is_active (w))	1443	if (expect_false (!ev_is_active (w)))
785	return;	1444	return;
		1445
		1446	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
786		1447
787	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1448	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
788	ev_stop ((W)w);	1449	ev_stop (EV_A_ (W)w);
789		1450
790	fd_change (w->fd);	1451	fd_change (EV_A_ w->fd);
791	}	1452	}
792		1453
793	void	1454	void
794	ev_timer_start (struct ev_timer *w)	1455	ev_timer_start (EV_P_ ev_timer *w)
795	{	1456	{
796	if (ev_is_active (w))	1457	if (expect_false (ev_is_active (w)))
797	return;	1458	return;
798		1459
799	w->at += now;	1460	((WT)w)->at += mn_now;
800		1461
801	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1462	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
802		1463
803	ev_start ((W)w, ++timercnt);	1464	ev_start (EV_A_ (W)w, ++timercnt);
804	array_needsize (timers, timermax, timercnt, );	1465	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
805	timers [timercnt - 1] = w;	1466	timers [timercnt - 1] = w;
806	upheap ((WT *)timers, timercnt - 1);	1467	upheap ((WT *)timers, timercnt - 1);
807	}
808		1468
		1469	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1470	}
		1471
809	void	1472	void
810	ev_timer_stop (struct ev_timer *w)	1473	ev_timer_stop (EV_P_ ev_timer *w)
811	{	1474	{
812	ev_clear_pending ((W)w);	1475	ev_clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1476	if (expect_false (!ev_is_active (w)))
814	return;	1477	return;
815		1478
		1479	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1480
816	if (w->active < timercnt--)	1481	if (expect_true (((W)w)->active < timercnt--))
817	{	1482	{
818	timers [w->active - 1] = timers [timercnt];	1483	timers [((W)w)->active - 1] = timers [timercnt];
819	downheap ((WT *)timers, timercnt, w->active - 1);	1484	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
820	}	1485	}
821		1486
822	w->at = w->repeat;	1487	((WT)w)->at -= mn_now;
823		1488
824	ev_stop ((W)w);	1489	ev_stop (EV_A_ (W)w);
825	}	1490	}
826		1491
827	void	1492	void
828	ev_timer_again (struct ev_timer *w)	1493	ev_timer_again (EV_P_ ev_timer *w)
829	{	1494	{
830	if (ev_is_active (w))	1495	if (ev_is_active (w))
831	{	1496	{
832	if (w->repeat)	1497	if (w->repeat)
833	{	1498	{
834	w->at = now + w->repeat;	1499	((WT)w)->at = mn_now + w->repeat;
835	downheap ((WT *)timers, timercnt, w->active - 1);	1500	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
836	}	1501	}
837	else	1502	else
838	ev_timer_stop (w);	1503	ev_timer_stop (EV_A_ w);
839	}	1504	}
840	else if (w->repeat)	1505	else if (w->repeat)
		1506	{
		1507	w->at = w->repeat;
841	ev_timer_start (w);	1508	ev_timer_start (EV_A_ w);
		1509	}
842	}	1510	}
843		1511
		1512	#if EV_PERIODIC_ENABLE
844	void	1513	void
845	ev_periodic_start (struct ev_periodic *w)	1514	ev_periodic_start (EV_P_ ev_periodic *w)
846	{	1515	{
847	if (ev_is_active (w))	1516	if (expect_false (ev_is_active (w)))
848	return;	1517	return;
849		1518
		1519	if (w->reschedule_cb)
		1520	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1521	else if (w->interval)
		1522	{
850	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1523	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
851
852	/* this formula differs from the one in periodic_reify because we do not always round up */	1524	/* this formula differs from the one in periodic_reify because we do not always round up */
853	if (w->interval)
854	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1525	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1526	}
855		1527
856	ev_start ((W)w, ++periodiccnt);	1528	ev_start (EV_A_ (W)w, ++periodiccnt);
857	array_needsize (periodics, periodicmax, periodiccnt, );	1529	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
858	periodics [periodiccnt - 1] = w;	1530	periodics [periodiccnt - 1] = w;
859	upheap ((WT *)periodics, periodiccnt - 1);	1531	upheap ((WT *)periodics, periodiccnt - 1);
860	}
861		1532
		1533	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1534	}
		1535
862	void	1536	void
863	ev_periodic_stop (struct ev_periodic *w)	1537	ev_periodic_stop (EV_P_ ev_periodic *w)
864	{	1538	{
865	ev_clear_pending ((W)w);	1539	ev_clear_pending (EV_A_ (W)w);
866	if (!ev_is_active (w))	1540	if (expect_false (!ev_is_active (w)))
867	return;	1541	return;
868		1542
		1543	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1544
869	if (w->active < periodiccnt--)	1545	if (expect_true (((W)w)->active < periodiccnt--))
870	{	1546	{
871	periodics [w->active - 1] = periodics [periodiccnt];	1547	periodics [((W)w)->active - 1] = periodics [periodiccnt];
872	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1548	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
873	}	1549	}
874		1550
875	ev_stop ((W)w);	1551	ev_stop (EV_A_ (W)w);
876	}	1552	}
877		1553
878	void	1554	void
		1555	ev_periodic_again (EV_P_ ev_periodic *w)
		1556	{
		1557	/* TODO: use adjustheap and recalculation */
		1558	ev_periodic_stop (EV_A_ w);
		1559	ev_periodic_start (EV_A_ w);
		1560	}
		1561	#endif
		1562
		1563	#ifndef SA_RESTART
		1564	# define SA_RESTART 0
		1565	#endif
		1566
		1567	void
879	ev_signal_start (struct ev_signal *w)	1568	ev_signal_start (EV_P_ ev_signal *w)
880	{	1569	{
		1570	#if EV_MULTIPLICITY
		1571	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1572	#endif
881	if (ev_is_active (w))	1573	if (expect_false (ev_is_active (w)))
882	return;	1574	return;
883		1575
884	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1576	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
885		1577
886	ev_start ((W)w, 1);	1578	ev_start (EV_A_ (W)w, 1);
887	array_needsize (signals, signalmax, w->signum, signals_init);	1579	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
888	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1580	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
889		1581
890	if (!w->next)	1582	if (!((WL)w)->next)
891	{	1583	{
		1584	#if _WIN32
		1585	signal (w->signum, sighandler);
		1586	#else
892	struct sigaction sa;	1587	struct sigaction sa;
893	sa.sa_handler = sighandler;	1588	sa.sa_handler = sighandler;
894	sigfillset (&sa.sa_mask);	1589	sigfillset (&sa.sa_mask);
895	sa.sa_flags = 0;	1590	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
896	sigaction (w->signum, &sa, 0);	1591	sigaction (w->signum, &sa, 0);
		1592	#endif
897	}	1593	}
898	}	1594	}
899		1595
900	void	1596	void
901	ev_signal_stop (struct ev_signal *w)	1597	ev_signal_stop (EV_P_ ev_signal *w)
902	{	1598	{
903	ev_clear_pending ((W)w);	1599	ev_clear_pending (EV_A_ (W)w);
904	if (!ev_is_active (w))	1600	if (expect_false (!ev_is_active (w)))
905	return;	1601	return;
906		1602
907	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1603	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
908	ev_stop ((W)w);	1604	ev_stop (EV_A_ (W)w);
909		1605
910	if (!signals [w->signum - 1].head)	1606	if (!signals [w->signum - 1].head)
911	signal (w->signum, SIG_DFL);	1607	signal (w->signum, SIG_DFL);
912	}	1608	}
913		1609
914	void	1610	void
		1611	ev_child_start (EV_P_ ev_child *w)
		1612	{
		1613	#if EV_MULTIPLICITY
		1614	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1615	#endif
		1616	if (expect_false (ev_is_active (w)))
		1617	return;
		1618
		1619	ev_start (EV_A_ (W)w, 1);
		1620	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1621	}
		1622
		1623	void
		1624	ev_child_stop (EV_P_ ev_child *w)
		1625	{
		1626	ev_clear_pending (EV_A_ (W)w);
		1627	if (expect_false (!ev_is_active (w)))
		1628	return;
		1629
		1630	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1631	ev_stop (EV_A_ (W)w);
		1632	}
		1633
		1634	#if EV_STAT_ENABLE
		1635
		1636	# ifdef _WIN32
		1637	# define lstat(a,b) stat(a,b)
		1638	# endif
		1639
		1640	#define DEF_STAT_INTERVAL 5.0074891
		1641	#define MIN_STAT_INTERVAL 0.1074891
		1642
		1643	void
		1644	ev_stat_stat (EV_P_ ev_stat *w)
		1645	{
		1646	if (lstat (w->path, &w->attr) < 0)
		1647	w->attr.st_nlink = 0;
		1648	else if (!w->attr.st_nlink)
		1649	w->attr.st_nlink = 1;
		1650	}
		1651
		1652	static void
		1653	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1654	{
		1655	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		1656
		1657	/* we copy this here each the time so that */
		1658	/* prev has the old value when the callback gets invoked */
		1659	w->prev = w->attr;
		1660	ev_stat_stat (EV_A_ w);
		1661
		1662	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
		1663	ev_feed_event (EV_A_ w, EV_STAT);
		1664	}
		1665
		1666	void
		1667	ev_stat_start (EV_P_ ev_stat *w)
		1668	{
		1669	if (expect_false (ev_is_active (w)))
		1670	return;
		1671
		1672	/* since we use memcmp, we need to clear any padding data etc. */
		1673	memset (&w->prev, 0, sizeof (ev_statdata));
		1674	memset (&w->attr, 0, sizeof (ev_statdata));
		1675
		1676	ev_stat_stat (EV_A_ w);
		1677
		1678	if (w->interval < MIN_STAT_INTERVAL)
		1679	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		1680
		1681	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		1682	ev_set_priority (&w->timer, ev_priority (w));
		1683	ev_timer_start (EV_A_ &w->timer);
		1684
		1685	ev_start (EV_A_ (W)w, 1);
		1686	}
		1687
		1688	void
		1689	ev_stat_stop (EV_P_ ev_stat *w)
		1690	{
		1691	ev_clear_pending (EV_A_ (W)w);
		1692	if (expect_false (!ev_is_active (w)))
		1693	return;
		1694
		1695	ev_timer_stop (EV_A_ &w->timer);
		1696
		1697	ev_stop (EV_A_ (W)w);
		1698	}
		1699	#endif
		1700
		1701	void
915	ev_idle_start (struct ev_idle *w)	1702	ev_idle_start (EV_P_ ev_idle *w)
916	{	1703	{
917	if (ev_is_active (w))	1704	if (expect_false (ev_is_active (w)))
918	return;	1705	return;
919		1706
920	ev_start ((W)w, ++idlecnt);	1707	ev_start (EV_A_ (W)w, ++idlecnt);
921	array_needsize (idles, idlemax, idlecnt, );	1708	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
922	idles [idlecnt - 1] = w;	1709	idles [idlecnt - 1] = w;
923	}	1710	}
924		1711
925	void	1712	void
926	ev_idle_stop (struct ev_idle *w)	1713	ev_idle_stop (EV_P_ ev_idle *w)
927	{	1714	{
928	ev_clear_pending ((W)w);	1715	ev_clear_pending (EV_A_ (W)w);
929	if (ev_is_active (w))	1716	if (expect_false (!ev_is_active (w)))
930	return;	1717	return;
931		1718
		1719	{
		1720	int active = ((W)w)->active;
932	idles [w->active - 1] = idles [--idlecnt];	1721	idles [active - 1] = idles [--idlecnt];
		1722	((W)idles [active - 1])->active = active;
		1723	}
		1724
933	ev_stop ((W)w);	1725	ev_stop (EV_A_ (W)w);
934	}	1726	}
935		1727
936	void	1728	void
937	ev_prepare_start (struct ev_prepare *w)	1729	ev_prepare_start (EV_P_ ev_prepare *w)
938	{	1730	{
939	if (ev_is_active (w))	1731	if (expect_false (ev_is_active (w)))
940	return;	1732	return;
941		1733
942	ev_start ((W)w, ++preparecnt);	1734	ev_start (EV_A_ (W)w, ++preparecnt);
943	array_needsize (prepares, preparemax, preparecnt, );	1735	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
944	prepares [preparecnt - 1] = w;	1736	prepares [preparecnt - 1] = w;
945	}	1737	}
946		1738
947	void	1739	void
948	ev_prepare_stop (struct ev_prepare *w)	1740	ev_prepare_stop (EV_P_ ev_prepare *w)
949	{	1741	{
950	ev_clear_pending ((W)w);	1742	ev_clear_pending (EV_A_ (W)w);
951	if (ev_is_active (w))	1743	if (expect_false (!ev_is_active (w)))
952	return;	1744	return;
953		1745
		1746	{
		1747	int active = ((W)w)->active;
954	prepares [w->active - 1] = prepares [--preparecnt];	1748	prepares [active - 1] = prepares [--preparecnt];
		1749	((W)prepares [active - 1])->active = active;
		1750	}
		1751
955	ev_stop ((W)w);	1752	ev_stop (EV_A_ (W)w);
956	}	1753	}
957		1754
958	void	1755	void
959	ev_check_start (struct ev_check *w)	1756	ev_check_start (EV_P_ ev_check *w)
960	{	1757	{
961	if (ev_is_active (w))	1758	if (expect_false (ev_is_active (w)))
962	return;	1759	return;
963		1760
964	ev_start ((W)w, ++checkcnt);	1761	ev_start (EV_A_ (W)w, ++checkcnt);
965	array_needsize (checks, checkmax, checkcnt, );	1762	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
966	checks [checkcnt - 1] = w;	1763	checks [checkcnt - 1] = w;
967	}	1764	}
968		1765
969	void	1766	void
970	ev_check_stop (struct ev_check *w)	1767	ev_check_stop (EV_P_ ev_check *w)
971	{	1768	{
972	ev_clear_pending ((W)w);	1769	ev_clear_pending (EV_A_ (W)w);
973	if (ev_is_active (w))	1770	if (expect_false (!ev_is_active (w)))
974	return;	1771	return;
975		1772
		1773	{
		1774	int active = ((W)w)->active;
976	checks [w->active - 1] = checks [--checkcnt];	1775	checks [active - 1] = checks [--checkcnt];
		1776	((W)checks [active - 1])->active = active;
		1777	}
		1778
977	ev_stop ((W)w);	1779	ev_stop (EV_A_ (W)w);
978	}	1780	}
979		1781
980	void	1782	#if EV_EMBED_ENABLE
981	ev_child_start (struct ev_child *w)	1783	void noinline
		1784	ev_embed_sweep (EV_P_ ev_embed *w)
982	{	1785	{
		1786	ev_loop (w->loop, EVLOOP_NONBLOCK);
		1787	}
		1788
		1789	static void
		1790	embed_cb (EV_P_ ev_io *io, int revents)
		1791	{
		1792	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		1793
983	if (ev_is_active (w))	1794	if (ev_cb (w))
984	return;	1795	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		1796	else
		1797	ev_embed_sweep (loop, w);
		1798	}
985		1799
		1800	void
		1801	ev_embed_start (EV_P_ ev_embed *w)
		1802	{
		1803	if (expect_false (ev_is_active (w)))
		1804	return;
		1805
		1806	{
		1807	struct ev_loop *loop = w->loop;
		1808	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		1809	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		1810	}
		1811
		1812	ev_set_priority (&w->io, ev_priority (w));
		1813	ev_io_start (EV_A_ &w->io);
		1814
986	ev_start ((W)w, 1);	1815	ev_start (EV_A_ (W)w, 1);
987	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
988	}	1816	}
989		1817
990	void	1818	void
991	ev_child_stop (struct ev_child *w)	1819	ev_embed_stop (EV_P_ ev_embed *w)
992	{	1820	{
993	ev_clear_pending ((W)w);	1821	ev_clear_pending (EV_A_ (W)w);
994	if (ev_is_active (w))	1822	if (expect_false (!ev_is_active (w)))
995	return;	1823	return;
996		1824
997	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1825	ev_io_stop (EV_A_ &w->io);
		1826
998	ev_stop ((W)w);	1827	ev_stop (EV_A_ (W)w);
999	}	1828	}
		1829	#endif
1000		1830
1001	/*****************************************************************************/	1831	/*****************************************************************************/
1002		1832
1003	struct ev_once	1833	struct ev_once
1004	{	1834	{
1005	struct ev_io io;	1835	ev_io io;
1006	struct ev_timer to;	1836	ev_timer to;
1007	void (*cb)(int revents, void *arg);	1837	void (*cb)(int revents, void *arg);
1008	void *arg;	1838	void *arg;
1009	};	1839	};
1010		1840
1011	static void	1841	static void
1012	once_cb (struct ev_once *once, int revents)	1842	once_cb (EV_P_ struct ev_once *once, int revents)
1013	{	1843	{
1014	void (*cb)(int revents, void *arg) = once->cb;	1844	void (*cb)(int revents, void *arg) = once->cb;
1015	void *arg = once->arg;	1845	void *arg = once->arg;
1016		1846
1017	ev_io_stop (&once->io);	1847	ev_io_stop (EV_A_ &once->io);
1018	ev_timer_stop (&once->to);	1848	ev_timer_stop (EV_A_ &once->to);
1019	free (once);	1849	ev_free (once);
1020		1850
1021	cb (revents, arg);	1851	cb (revents, arg);
1022	}	1852	}
1023		1853
1024	static void	1854	static void
1025	once_cb_io (struct ev_io *w, int revents)	1855	once_cb_io (EV_P_ ev_io *w, int revents)
1026	{	1856	{
1027	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1857	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1028	}	1858	}
1029		1859
1030	static void	1860	static void
1031	once_cb_to (struct ev_timer *w, int revents)	1861	once_cb_to (EV_P_ ev_timer *w, int revents)
1032	{	1862	{
1033	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1863	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1034	}	1864	}
1035		1865
1036	void	1866	void
1037	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1867	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1038	{	1868	{
1039	struct ev_once *once = malloc (sizeof (struct ev_once));	1869	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1040		1870
1041	if (!once)	1871	if (expect_false (!once))
		1872	{
1042	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1873	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1043	else	1874	return;
1044	{	1875	}
		1876
1045	once->cb = cb;	1877	once->cb = cb;
1046	once->arg = arg;	1878	once->arg = arg;
1047		1879
1048	ev_watcher_init (&once->io, once_cb_io);	1880	ev_init (&once->io, once_cb_io);
1049	if (fd >= 0)	1881	if (fd >= 0)
1050	{	1882	{
1051	ev_io_set (&once->io, fd, events);	1883	ev_io_set (&once->io, fd, events);
1052	ev_io_start (&once->io);	1884	ev_io_start (EV_A_ &once->io);
1053	}	1885	}
1054		1886
1055	ev_watcher_init (&once->to, once_cb_to);	1887	ev_init (&once->to, once_cb_to);
1056	if (timeout >= 0.)	1888	if (timeout >= 0.)
1057	{	1889	{
1058	ev_timer_set (&once->to, timeout, 0.);	1890	ev_timer_set (&once->to, timeout, 0.);
1059	ev_timer_start (&once->to);	1891	ev_timer_start (EV_A_ &once->to);
1060	}
1061	}
1062	}
1063
1064	/*****************************************************************************/
1065
1066	#if 0
1067
1068	struct ev_io wio;
1069
1070	static void
1071	sin_cb (struct ev_io *w, int revents)
1072	{
1073	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1074	}
1075
1076	static void
1077	ocb (struct ev_timer *w, int revents)
1078	{
1079	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1080	ev_timer_stop (w);
1081	ev_timer_start (w);
1082	}
1083
1084	static void
1085	scb (struct ev_signal *w, int revents)
1086	{
1087	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1088	ev_io_stop (&wio);
1089	ev_io_start (&wio);
1090	}
1091
1092	static void
1093	gcb (struct ev_signal *w, int revents)
1094	{
1095	fprintf (stderr, "generic %x\n", revents);
1096
1097	}
1098
1099	int main (void)
1100	{
1101	ev_init (0);
1102
1103	ev_io_init (&wio, sin_cb, 0, EV_READ);
1104	ev_io_start (&wio);
1105
1106	struct ev_timer t[10000];
1107
1108	#if 0
1109	int i;
1110	for (i = 0; i < 10000; ++i)
1111	{	1892	}
1112	struct ev_timer *w = t + i;
1113	ev_watcher_init (w, ocb, i);
1114	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1115	ev_timer_start (w);
1116	if (drand48 () < 0.5)
1117	ev_timer_stop (w);
1118	}
1119	#endif
1120
1121	struct ev_timer t1;
1122	ev_timer_init (&t1, ocb, 5, 10);
1123	ev_timer_start (&t1);
1124
1125	struct ev_signal sig;
1126	ev_signal_init (&sig, scb, SIGQUIT);
1127	ev_signal_start (&sig);
1128
1129	struct ev_check cw;
1130	ev_check_init (&cw, gcb);
1131	ev_check_start (&cw);
1132
1133	struct ev_idle iw;
1134	ev_idle_init (&iw, gcb);
1135	ev_idle_start (&iw);
1136
1137	ev_loop (0);
1138
1139	return 0;
1140	}	1893	}
1141		1894
		1895	#ifdef __cplusplus
		1896	}
1142	#endif	1897	#endif
1143		1898
1144
1145
1146

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