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

Comparing libev/ev.c (file contents):
Revision 1.27 by root, Wed Oct 31 22:16:36 2007 UTC vs.
Revision 1.145 by root, Tue Nov 27 08:54:38 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
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	*/
29		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
		37	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
		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
		99	#endif
		100
30	#include <math.h>	101	#include <math.h>
31	#include <stdlib.h>	102	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	103	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	104	#include <stddef.h>
36		105
37	#include <stdio.h>	106	#include <stdio.h>
38		107
39	#include <assert.h>	108	#include <assert.h>
40	#include <errno.h>	109	#include <errno.h>
41	#include <sys/types.h>	110	#include <sys/types.h>
42	#include <sys/wait.h>
43	#include <sys/time.h>
44	#include <time.h>	111	#include <time.h>
45		112
46	#ifndef HAVE_MONOTONIC	113	#include <signal.h>
47	# ifdef CLOCK_MONOTONIC	114
48	# define HAVE_MONOTONIC 1	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
49	# endif	124	# endif
50	#endif	125	#endif
51		126
		127	/**/
		128
		129	#ifndef EV_USE_MONOTONIC
		130	# define EV_USE_MONOTONIC 0
		131	#endif
		132
		133	#ifndef EV_USE_REALTIME
		134	# define EV_USE_REALTIME 0
		135	#endif
		136
52	#ifndef HAVE_SELECT	137	#ifndef EV_USE_SELECT
53	# define HAVE_SELECT 1	138	# define EV_USE_SELECT 1
		139	#endif
		140
		141	#ifndef EV_USE_POLL
		142	# ifdef _WIN32
		143	# define EV_USE_POLL 0
		144	# else
		145	# define EV_USE_POLL 1
54	#endif	146	# endif
		147	#endif
55		148
56	#ifndef HAVE_EPOLL	149	#ifndef EV_USE_EPOLL
57	# define HAVE_EPOLL 0	150	# define EV_USE_EPOLL 0
58	#endif	151	#endif
59		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
60	#ifndef HAVE_REALTIME	168	#ifndef CLOCK_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	169	# undef EV_USE_REALTIME
		170	# define EV_USE_REALTIME 0
62	#endif	171	#endif
		172
		173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
		175	#endif
		176
		177	/**/
63		178
64	#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) */
65	#define MAX_BLOCKTIME 60.	180	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	181	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		182	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds */
67		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
68	#include "ev.h"	187	# include "ev.h"
		188	#endif
69		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_size 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
70	typedef struct ev_watcher *W;	216	typedef ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	217	typedef ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	218	typedef ev_watcher_time *WT;
73		219
74	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
75	ev_tstamp ev_now;	311	ev_tstamp ev_rt_now;
76	int ev_method;	312	#define VAR(name,decl) static decl;
		313	#include "ev_vars.h"
		314	#undef VAR
77		315
78	static int have_monotonic; /* runtime */	316	static int ev_default_loop_ptr;
79		317
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	318	#endif
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		319
84	/*****************************************************************************/	320	/*****************************************************************************/
85		321
86	ev_tstamp	322	ev_tstamp
87	ev_time (void)	323	ev_time (void)
88	{	324	{
89	#if HAVE_REALTIME	325	#if EV_USE_REALTIME
90	struct timespec ts;	326	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	327	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	328	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	329	#else
94	struct timeval tv;	330	struct timeval tv;
95	gettimeofday (&tv, 0);	331	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	332	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	333	#endif
98	}	334	}
99		335
100	static ev_tstamp	336	ev_tstamp inline_size
101	get_clock (void)	337	get_clock (void)
102	{	338	{
103	#if HAVE_MONOTONIC	339	#if EV_USE_MONOTONIC
104	if (have_monotonic)	340	if (expect_true (have_monotonic))
105	{	341	{
106	struct timespec ts;	342	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	343	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	344	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	345	}
110	#endif	346	#endif
111		347
112	return ev_time ();	348	return ev_time ();
113	}	349	}
114		350
		351	#if EV_MULTIPLICITY
		352	ev_tstamp
		353	ev_now (EV_P)
		354	{
		355	return ev_rt_now;
		356	}
		357	#endif
		358
		359	#define array_roundsize(type,n) (((n) \| 4) & ~3)
		360
115	#define array_needsize(base,cur,cnt,init) \	361	#define array_needsize(type,base,cur,cnt,init) \
116	if ((cnt) > cur) \	362	if (expect_false ((cnt) > cur)) \
117	{ \	363	{ \
118	int newcnt = cur; \	364	int newcnt = cur; \
119	do \	365	do \
120	{ \	366	{ \
121	newcnt = (newcnt << 1) \| 4 & ~3; \	367	newcnt = array_roundsize (type, newcnt << 1); \
122	} \	368	} \
123	while ((cnt) > newcnt); \	369	while ((cnt) > newcnt); \
124	\	370	\
125	base = realloc (base, sizeof (base) (newcnt)); \	371	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
126	init (base + cur, newcnt - cur); \	372	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	373	cur = newcnt; \
128	}	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;
129		386
130	/*****************************************************************************/	387	/*****************************************************************************/
131		388
132	typedef struct	389	void noinline
		390	ev_feed_event (EV_P_ void *w, int revents)
133	{	391	{
134	struct ev_io *head;	392	W w_ = (W)w;
135	int events;
136	} ANFD;
137		393
138	static ANFD *anfds;	394	if (expect_false (w_->pending))
139	static int anfdmax;	395	{
		396	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		397	return;
		398	}
140		399
141	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
142	anfds_init (ANFD *base, int count)	418	anfds_init (ANFD *base, int count)
143	{	419	{
144	while (count--)	420	while (count--)
145	{	421	{
146	base->head = 0;	422	base->head = 0;
147	base->events = EV_NONE;	423	base->events = EV_NONE;
		424	base->reify = 0;
		425
148	++base;	426	++base;
149	}	427	}
150	}	428	}
151		429
152	typedef struct	430	void inline_speed
153	{
154	W w;
155	int events;
156	} ANPENDING;
157
158	static ANPENDING *pendings;
159	static int pendingmax, pendingcnt;
160
161	static void
162	event (W w, int events)
163	{
164	if (w->active)
165	{
166	w->pending = ++pendingcnt;
167	array_needsize (pendings, pendingmax, pendingcnt, );
168	pendings [pendingcnt - 1].w = w;
169	pendings [pendingcnt - 1].events = events;
170	}
171	}
172
173	static void
174	queue_events (W *events, int eventcnt, int type)
175	{
176	int i;
177
178	for (i = 0; i < eventcnt; ++i)
179	event (events [i], type);
180	}
181
182	static void
183	fd_event (int fd, int events)	431	fd_event (EV_P_ int fd, int revents)
184	{	432	{
185	ANFD *anfd = anfds + fd;	433	ANFD *anfd = anfds + fd;
186	struct ev_io *w;	434	ev_io *w;
187		435
188	for (w = anfd->head; w; w = w->next)	436	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
189	{	437	{
190	int ev = w->events & events;	438	int ev = w->events & revents;
191		439
192	if (ev)	440	if (ev)
193	event ((W)w, ev);	441	ev_feed_event (EV_A_ (W)w, ev);
194	}	442	}
195	}	443	}
196		444
197	/*****************************************************************************/	445	void
		446	ev_feed_fd_event (EV_P_ int fd, int revents)
		447	{
		448	fd_event (EV_A_ fd, revents);
		449	}
198		450
199	static int *fdchanges;	451	void inline_size
200	static int fdchangemax, fdchangecnt;	452	fd_reify (EV_P)
201
202	static void
203	fd_reify (void)
204	{	453	{
205	int i;	454	int i;
206		455
207	for (i = 0; i < fdchangecnt; ++i)	456	for (i = 0; i < fdchangecnt; ++i)
208	{	457	{
209	int fd = fdchanges [i];	458	int fd = fdchanges [i];
210	ANFD *anfd = anfds + fd;	459	ANFD *anfd = anfds + fd;
211	struct ev_io *w;	460	ev_io *w;
212		461
213	int events = 0;	462	int events = 0;
214		463
215	for (w = anfd->head; w; w = w->next)	464	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
216	events \|= w->events;	465	events \|= w->events;
217		466
218	anfd->events &= ~EV_REIFY;	467	#if EV_SELECT_IS_WINSOCKET
219		468	if (events)
220	if (anfd->events != events)
221	{	469	{
222	method_modify (fd, anfd->events, events);	470	unsigned long argp;
223	anfd->events = events;	471	anfd->handle = _get_osfhandle (fd);
		472	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
224	}	473	}
		474	#endif
		475
		476	anfd->reify = 0;
		477
		478	backend_modify (EV_A_ fd, anfd->events, events);
		479	anfd->events = events;
225	}	480	}
226		481
227	fdchangecnt = 0;	482	fdchangecnt = 0;
228	}	483	}
229		484
230	static void	485	void inline_size
231	fd_change (int fd)	486	fd_change (EV_P_ int fd)
232	{	487	{
233	if (anfds [fd].events & EV_REIFY)	488	if (expect_false (anfds [fd].reify))
234	return;	489	return;
235		490
236	anfds [fd].events \|= EV_REIFY;	491	anfds [fd].reify = 1;
237		492
238	++fdchangecnt;	493	++fdchangecnt;
239	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	494	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
240	fdchanges [fdchangecnt - 1] = fd;	495	fdchanges [fdchangecnt - 1] = fd;
241	}	496	}
242		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
243	/* called on EBADF to verify fds */	520	/* called on EBADF to verify fds */
244	static void	521	static void noinline
245	fd_recheck (void)	522	fd_ebadf (EV_P)
246	{	523	{
247	int fd;	524	int fd;
248		525
249	for (fd = 0; fd < anfdmax; ++fd)	526	for (fd = 0; fd < anfdmax; ++fd)
250	if (anfds [fd].events)	527	if (anfds [fd].events)
251	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	528	if (!fd_valid (fd) == -1 && errno == EBADF)
252	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)
253	{	540	{
254	event ((W)anfds [fd].head, EV_ERROR);	541	fd_kill (EV_A_ fd);
255	evio_stop (anfds [fd].head);	542	return;
256	}	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	}
257	}	559	}
258		560
259	/*****************************************************************************/	561	/*****************************************************************************/
260		562
261	static struct ev_timer **timers;	563	void inline_speed
262	static int timermax, timercnt;
263
264	static struct ev_periodic **periodics;
265	static int periodicmax, periodiccnt;
266
267	static void
268	upheap (WT *timers, int k)	564	upheap (WT *heap, int k)
269	{	565	{
270	WT w = timers [k];	566	WT w = heap [k];
271		567
272	while (k && timers [k >> 1]->at > w->at)	568	while (k && heap [k >> 1]->at > w->at)
273	{	569	{
274	timers [k] = timers [k >> 1];	570	heap [k] = heap [k >> 1];
275	timers [k]->active = k + 1;	571	((W)heap [k])->active = k + 1;
276	k >>= 1;	572	k >>= 1;
277	}	573	}
278		574
279	timers [k] = w;	575	heap [k] = w;
280	timers [k]->active = k + 1;	576	((W)heap [k])->active = k + 1;
281		577
282	}	578	}
283		579
284	static void	580	void inline_speed
285	downheap (WT *timers, int N, int k)	581	downheap (WT *heap, int N, int k)
286	{	582	{
287	WT w = timers [k];	583	WT w = heap [k];
288		584
289	while (k < (N >> 1))	585	while (k < (N >> 1))
290	{	586	{
291	int j = k << 1;	587	int j = k << 1;
292		588
293	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	589	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
294	++j;	590	++j;
295		591
296	if (w->at <= timers [j]->at)	592	if (w->at <= heap [j]->at)
297	break;	593	break;
298		594
299	timers [k] = timers [j];	595	heap [k] = heap [j];
300	timers [k]->active = k + 1;	596	((W)heap [k])->active = k + 1;
301	k = j;	597	k = j;
302	}	598	}
303		599
304	timers [k] = w;	600	heap [k] = w;
305	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);
306	}	609	}
307		610
308	/*****************************************************************************/	611	/*****************************************************************************/
309		612
310	typedef struct	613	typedef struct
311	{	614	{
312	struct ev_signal *head;	615	WL head;
313	sig_atomic_t gotsig;	616	sig_atomic_t volatile gotsig;
314	} ANSIG;	617	} ANSIG;
315		618
316	static ANSIG *signals;	619	static ANSIG *signals;
317	static int signalmax;	620	static int signalmax;
318		621
319	static int sigpipe [2];	622	static int sigpipe [2];
320	static sig_atomic_t gotsig;	623	static sig_atomic_t volatile gotsig;
321	static struct ev_io sigev;	624	static ev_io sigev;
322		625
323	static void	626	void inline_size
324	signals_init (ANSIG *base, int count)	627	signals_init (ANSIG *base, int count)
325	{	628	{
326	while (count--)	629	while (count--)
327	{	630	{
328	base->head = 0;	631	base->head = 0;
329	base->gotsig = 0;	632	base->gotsig = 0;
		633
330	++base;	634	++base;
331	}	635	}
332	}	636	}
333		637
334	static void	638	static void
335	sighandler (int signum)	639	sighandler (int signum)
336	{	640	{
		641	#if _WIN32
		642	signal (signum, sighandler);
		643	#endif
		644
337	signals [signum - 1].gotsig = 1;	645	signals [signum - 1].gotsig = 1;
338		646
339	if (!gotsig)	647	if (!gotsig)
340	{	648	{
		649	int old_errno = errno;
341	gotsig = 1;	650	gotsig = 1;
342	write (sigpipe [1], &gotsig, 1);	651	write (sigpipe [1], &signum, 1);
		652	errno = old_errno;
343	}	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);
344	}	674	}
345		675
346	static void	676	static void
347	sigcb (struct ev_io *iow, int revents)	677	sigcb (EV_P_ ev_io *iow, int revents)
348	{	678	{
349	struct ev_signal *w;
350	int sig;	679	int signum;
351		680
		681	read (sigpipe [0], &revents, 1);
352	gotsig = 0;	682	gotsig = 0;
353	read (sigpipe [0], &revents, 1);
354		683
355	for (sig = signalmax; sig--; )	684	for (signum = signalmax; signum--; )
356	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)
357	{	727	{
358	signals [sig].gotsig = 0;	728	ev_priority (w) = ev_priority (sw); /* need to do it now */
359		729	w->rpid = pid;
360	for (w = signals [sig].head; w; w = w->next)	730	w->rstatus = status;
361	event ((W)w, EV_SIGNAL);	731	ev_feed_event (EV_A_ (W)w, EV_CHILD);
362	}	732	}
363	}	733	}
364
365	static void
366	siginit (void)
367	{
368	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
369	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
370
371	/* rather than sort out wether we really need nb, set it */
372	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
373	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
374
375	evio_set (&sigev, sigpipe [0], EV_READ);
376	evio_start (&sigev);
377	}
378
379	/*****************************************************************************/
380
381	static struct ev_idle **idles;
382	static int idlemax, idlecnt;
383
384	static struct ev_prepare **prepares;
385	static int preparemax, preparecnt;
386
387	static struct ev_check **checks;
388	static int checkmax, checkcnt;
389
390	/*****************************************************************************/
391
392	static struct ev_child *childs [PID_HASHSIZE];
393	static struct ev_signal childev;
394		734
395	#ifndef WCONTINUED	735	#ifndef WCONTINUED
396	# define WCONTINUED 0	736	# define WCONTINUED 0
397	#endif	737	#endif
398		738
399	static void	739	static void
400	childcb (struct ev_signal *sw, int revents)	740	childcb (EV_P_ ev_signal *sw, int revents)
401	{	741	{
402	struct ev_child *w;
403	int pid, status;	742	int pid, status;
404		743
		744	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
405	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	745	if (0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
406	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	746	if (!WCONTINUED
407	if (w->pid == pid \|\| w->pid == -1)	747	\|\| errno != EINVAL
408	{	748	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))
409	w->status = status;	749	return;
410	event ((W)w, EV_CHILD);	750
411	}	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 */
412	}	757	}
		758
		759	#endif
413		760
414	/*****************************************************************************/	761	/*****************************************************************************/
415		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
416	#if HAVE_EPOLL	769	#if EV_USE_EPOLL
417	# include "ev_epoll.c"	770	# include "ev_epoll.c"
418	#endif	771	#endif
		772	#if EV_USE_POLL
		773	# include "ev_poll.c"
		774	#endif
419	#if HAVE_SELECT	775	#if EV_USE_SELECT
420	# include "ev_select.c"	776	# include "ev_select.c"
421	#endif	777	#endif
422		778
423	int	779	int
424	ev_version_major (void)	780	ev_version_major (void)
…		…
430	ev_version_minor (void)	786	ev_version_minor (void)
431	{	787	{
432	return EV_VERSION_MINOR;	788	return EV_VERSION_MINOR;
433	}	789	}
434		790
435	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)
436	{	794	{
437	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)
438	{	853	{
439	#if HAVE_MONOTONIC	854	#if EV_USE_MONOTONIC
440	{	855	{
441	struct timespec ts;	856	struct timespec ts;
442	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	857	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
443	have_monotonic = 1;	858	have_monotonic = 1;
444	}	859	}
445	#endif	860	#endif
446		861
447	ev_now = ev_time ();	862	ev_rt_now = ev_time ();
448	now = get_clock ();	863	mn_now = get_clock ();
		864	now_floor = mn_now;
449	diff = ev_now - now;	865	rtmn_diff = ev_rt_now - mn_now;
450		866
		867	if (!(flags & EVFLAG_NOENV)
		868	&& !enable_secure ()
		869	&& getenv ("LIBEV_FLAGS"))
		870	flags = atoi (getenv ("LIBEV_FLAGS"));
		871
		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
		882	#if EV_USE_EPOLL
		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);
		887	#endif
		888	#if EV_USE_SELECT
		889	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		890	#endif
		891
		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])
451	if (pipe (sigpipe))	1005	if (pipe (sigpipe))
452	return 0;	1006	return 0;
453		1007
454	ev_method = EVMETHOD_NONE;	1008	if (!ev_default_loop_ptr)
455	#if HAVE_EPOLL	1009	{
456	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	1010	#if EV_MULTIPLICITY
		1011	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1012	#else
		1013	ev_default_loop_ptr = 1;
457	#endif	1014	#endif
458	#if HAVE_SELECT
459	if (ev_method == EVMETHOD_NONE) select_init (flags);
460	#endif
461		1015
462	if (ev_method)	1016	loop_init (EV_A_ flags);
		1017
		1018	if (ev_backend (EV_A))
463	{	1019	{
464	evw_init (&sigev, sigcb);
465	siginit ();	1020	siginit (EV_A);
466		1021
		1022	#ifndef _WIN32
467	evsignal_init (&childev, childcb, SIGCHLD);	1023	ev_signal_init (&childev, childcb, SIGCHLD);
		1024	ev_set_priority (&childev, EV_MAXPRI);
468	evsignal_start (&childev);	1025	ev_signal_start (EV_A_ &childev);
		1026	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1027	#endif
469	}	1028	}
		1029	else
		1030	ev_default_loop_ptr = 0;
470	}	1031	}
471		1032
472	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;
473	}	1066	}
474		1067
475	/*****************************************************************************/	1068	/*****************************************************************************/
476		1069
477	void	1070	int inline_size
478	ev_prefork (void)	1071	any_pending (EV_P)
479	{	1072	{
480	/* nop */	1073	int pri;
481	}
482		1074
483	void	1075	for (pri = NUMPRI; pri--; )
484	ev_postfork_parent (void)	1076	if (pendingcnt [pri])
485	{	1077	return 1;
486	/* nop */
487	}
488		1078
489	void	1079	return 0;
490	ev_postfork_child (void)
491	{
492	#if HAVE_EPOLL
493	if (ev_method == EVMETHOD_EPOLL)
494	epoll_postfork_child ();
495	#endif
496
497	evio_stop (&sigev);
498	close (sigpipe [0]);
499	close (sigpipe [1]);
500	pipe (sigpipe);
501	siginit ();
502	}	1080	}
503		1081
504	/*****************************************************************************/	1082	void inline_speed
505
506	static void
507	call_pending (void)	1083	call_pending (EV_P)
508	{	1084	{
		1085	int pri;
		1086
		1087	for (pri = NUMPRI; pri--; )
509	while (pendingcnt)	1088	while (pendingcnt [pri])
510	{	1089	{
511	ANPENDING *p = pendings + --pendingcnt;	1090	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
512		1091
513	if (p->w)	1092	if (expect_true (p->w))
514	{	1093	{
		1094	assert (("non-pending watcher on pending list", p->w->pending));
		1095
515	p->w->pending = 0;	1096	p->w->pending = 0;
516	p->w->cb (p->w, p->events);	1097	EV_CB_INVOKE (p->w, p->events);
517	}	1098	}
518	}	1099	}
519	}	1100	}
520		1101
521	static void	1102	void inline_size
522	timers_reify (void)	1103	timers_reify (EV_P)
523	{	1104	{
524	while (timercnt && timers [0]->at <= now)	1105	while (timercnt && ((WT)timers [0])->at <= mn_now)
525	{	1106	{
526	struct ev_timer *w = timers [0];	1107	ev_timer *w = timers [0];
527		1108
528	event ((W)w, EV_TIMEOUT);	1109	assert (("inactive timer on timer heap detected", ev_is_active (w)));
529		1110
530	/* first reschedule or stop timer */	1111	/* first reschedule or stop timer */
531	if (w->repeat)	1112	if (w->repeat)
532	{	1113	{
		1114	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1115
533	w->at = now + w->repeat;	1116	((WT)w)->at += w->repeat;
534	assert (("timer timeout in the past, negative repeat?", w->at > now));	1117	if (((WT)w)->at < mn_now)
		1118	((WT)w)->at = mn_now;
		1119
535	downheap ((WT *)timers, timercnt, 0);	1120	downheap ((WT *)timers, timercnt, 0);
536	}	1121	}
537	else	1122	else
538	evtimer_stop (w); /* nonrepeating: stop timer */	1123	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
539	}
540	}
541		1124
542	static void	1125	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1126	}
		1127	}
		1128
		1129	#if EV_PERIODIC_ENABLE
		1130	void inline_size
543	periodics_reify (void)	1131	periodics_reify (EV_P)
544	{	1132	{
545	while (periodiccnt && periodics [0]->at <= ev_now)	1133	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
546	{	1134	{
547	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)));
548		1138
549	/* first reschedule or stop timer */	1139	/* first reschedule or stop timer */
550	if (w->interval)	1140	if (w->reschedule_cb)
551	{	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	{
552	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;
553	assert (("periodic timeout in the past, 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));
554	downheap ((WT *)periodics, periodiccnt, 0);	1150	downheap ((WT *)periodics, periodiccnt, 0);
555	}	1151	}
556	else	1152	else
557	evperiodic_stop (w); /* nonrepeating: stop timer */	1153	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
558		1154
559	event ((W)w, EV_TIMEOUT);	1155	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
560	}	1156	}
561	}	1157	}
562		1158
563	static void	1159	static void noinline
564	periodics_reschedule (ev_tstamp diff)	1160	periodics_reschedule (EV_P)
565	{	1161	{
566	int i;	1162	int i;
567		1163
568	/* adjust periodics after time jump */	1164	/* adjust periodics after time jump */
569	for (i = 0; i < periodiccnt; ++i)	1165	for (i = 0; i < periodiccnt; ++i)
570	{	1166	{
571	struct ev_periodic *w = periodics [i];	1167	ev_periodic *w = periodics [i];
572		1168
		1169	if (w->reschedule_cb)
		1170	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
573	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))
574	{	1208	{
575	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1209	ev_tstamp odiff = rtmn_diff;
576		1210
577	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; )
578	{	1220	{
579	evperiodic_stop (w);	1221	rtmn_diff = ev_rt_now - mn_now;
580	evperiodic_start (w);
581		1222
582	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;
583	}	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) */
584	}	1236	}
585	}	1237	}
586	}	1238	else
587		1239	#endif
588	static void	1240	{
589	time_update (void)
590	{
591	int i;
592
593	ev_now = ev_time ();	1241	ev_rt_now = ev_time ();
594		1242
595	if (have_monotonic)	1243	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
596	{
597	ev_tstamp odiff = diff;
598
599	for (i = 4; --i; ) /* loop a few times, before making important decisions */
600	{	1244	{
601	now = get_clock ();	1245	#if EV_PERIODIC_ENABLE
602	diff = ev_now - now;
603
604	if (fabs (odiff - diff) < MIN_TIMEJUMP)
605	return; /* all is well */
606
607	ev_now = ev_time ();
608	}
609
610	periodics_reschedule (diff - odiff);
611	/* no timer adjustment, as the monotonic clock doesn't jump */
612	}
613	else
614	{
615	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
616	{
617	periodics_reschedule (ev_now - now);	1246	periodics_reschedule (EV_A);
		1247	#endif
618		1248
619	/* 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 */
620	for (i = 0; i < timercnt; ++i)	1250	for (i = 0; i < timercnt; ++i)
621	timers [i]->at += diff;	1251	((WT)timers [i])->at += ev_rt_now - mn_now;
622	}	1252	}
623		1253
624	now = ev_now;	1254	mn_now = ev_rt_now;
625	}	1255	}
626	}	1256	}
627		1257
628	int ev_loop_done;	1258	void
		1259	ev_ref (EV_P)
		1260	{
		1261	++activecnt;
		1262	}
629		1263
		1264	void
		1265	ev_unref (EV_P)
		1266	{
		1267	--activecnt;
		1268	}
		1269
		1270	static int loop_done;
		1271
		1272	void
630	void ev_loop (int flags)	1273	ev_loop (EV_P_ int flags)
631	{	1274	{
632	double block;
633	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	1275	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)
		1276	? EVUNLOOP_ONE
		1277	: EVUNLOOP_CANCEL;
634		1278
635	do	1279	while (activecnt)
636	{	1280	{
637	/* queue check watchers (and execute them) */	1281	/* queue check watchers (and execute them) */
638	if (preparecnt)	1282	if (expect_false (preparecnt))
639	{	1283	{
640	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1284	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
641	call_pending ();	1285	call_pending (EV_A);
642	}	1286	}
643		1287
		1288	/* we might have forked, so reify kernel state if necessary */
		1289	if (expect_false (postfork))
		1290	loop_fork (EV_A);
		1291
644	/* update fd-related kernel structures */	1292	/* update fd-related kernel structures */
645	fd_reify ();	1293	fd_reify (EV_A);
646		1294
647	/* calculate blocking time */	1295	/* calculate blocking time */
		1296	{
		1297	double block;
648		1298
649	/* we only need this for !monotonic clockor timers, but as we basically
650	always have timers, we just calculate it always */
651	ev_now = ev_time ();
652
653	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1299	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
654	block = 0.;	1300	block = 0.; /* do not block at all */
655	else	1301	else
656	{	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
657	block = MAX_BLOCKTIME;	1314	block = MAX_BLOCKTIME;
658		1315
659	if (timercnt)	1316	if (timercnt)
660	{	1317	{
661	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;
662	if (block > to) block = to;	1319	if (block > to) block = to;
663	}	1320	}
664		1321
		1322	#if EV_PERIODIC_ENABLE
665	if (periodiccnt)	1323	if (periodiccnt)
666	{	1324	{
667	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1325	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
668	if (block > to) block = to;	1326	if (block > to) block = to;
669	}	1327	}
		1328	#endif
670		1329
671	if (block < 0.) block = 0.;	1330	if (expect_false (block < 0.)) block = 0.;
672	}	1331	}
673		1332
674	method_poll (block);	1333	backend_poll (EV_A_ block);
		1334	}
675		1335
676	/* update ev_now, do magic */	1336	/* update ev_rt_now, do magic */
677	time_update ();	1337	time_update (EV_A);
678		1338
679	/* queue pending timers and reschedule them */	1339	/* queue pending timers and reschedule them */
680	timers_reify (); /* relative timers called last */	1340	timers_reify (EV_A); /* relative timers called last */
		1341	#if EV_PERIODIC_ENABLE
681	periodics_reify (); /* absolute timers called first */	1342	periodics_reify (EV_A); /* absolute timers called first */
		1343	#endif
682		1344
683	/* queue idle watchers unless io or timers are pending */	1345	/* queue idle watchers unless other events are pending */
684	if (!pendingcnt)	1346	if (idlecnt && !any_pending (EV_A))
685	queue_events ((W *)idles, idlecnt, EV_IDLE);	1347	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
686		1348
687	/* queue check watchers, to be executed first */	1349	/* queue check watchers, to be executed first */
688	if (checkcnt)	1350	if (expect_false (checkcnt))
689	queue_events ((W *)checks, checkcnt, EV_CHECK);	1351	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
690		1352
691	call_pending ();	1353	call_pending (EV_A);
692	}
693	while (!ev_loop_done);
694		1354
695	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	{
696	ev_loop_done = 0;	1366	loop_done = how;
697	}	1367	}
698		1368
699	/*****************************************************************************/	1369	/*****************************************************************************/
700		1370
701	static void	1371	void inline_size
702	wlist_add (WL *head, WL elem)	1372	wlist_add (WL *head, WL elem)
703	{	1373	{
704	elem->next = *head;	1374	elem->next = *head;
705	*head = elem;	1375	*head = elem;
706	}	1376	}
707		1377
708	static void	1378	void inline_size
709	wlist_del (WL *head, WL elem)	1379	wlist_del (WL *head, WL elem)
710	{	1380	{
711	while (*head)	1381	while (*head)
712	{	1382	{
713	if (*head == elem)	1383	if (*head == elem)
…		…
718		1388
719	head = &(*head)->next;	1389	head = &(*head)->next;
720	}	1390	}
721	}	1391	}
722		1392
723	static void	1393	void inline_speed
724	ev_clear (W w)	1394	ev_clear_pending (EV_P_ W w)
725	{	1395	{
726	if (w->pending)	1396	if (w->pending)
727	{	1397	{
728	pendings [w->pending - 1].w = 0;	1398	pendings [ABSPRI (w)][w->pending - 1].w = 0;
729	w->pending = 0;	1399	w->pending = 0;
730	}	1400	}
731	}	1401	}
732		1402
733	static void	1403	void inline_speed
734	ev_start (W w, int active)	1404	ev_start (EV_P_ W w, int active)
735	{	1405	{
		1406	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1407	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1408
736	w->active = active;	1409	w->active = active;
		1410	ev_ref (EV_A);
737	}	1411	}
738		1412
739	static void	1413	void inline_size
740	ev_stop (W w)	1414	ev_stop (EV_P_ W w)
741	{	1415	{
		1416	ev_unref (EV_A);
742	w->active = 0;	1417	w->active = 0;
743	}	1418	}
744		1419
745	/*****************************************************************************/	1420	/*****************************************************************************/
746		1421
747	void	1422	void
748	evio_start (struct ev_io *w)	1423	ev_io_start (EV_P_ ev_io *w)
749	{	1424	{
750	if (ev_is_active (w))
751	return;
752
753	int fd = w->fd;	1425	int fd = w->fd;
754		1426
		1427	if (expect_false (ev_is_active (w)))
		1428	return;
		1429
		1430	assert (("ev_io_start called with negative fd", fd >= 0));
		1431
755	ev_start ((W)w, 1);	1432	ev_start (EV_A_ (W)w, 1);
756	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1433	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
757	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1434	wlist_add ((WL *)&anfds[fd].head, (WL)w);
758		1435
759	fd_change (fd);	1436	fd_change (EV_A_ fd);
760	}	1437	}
761		1438
762	void	1439	void
763	evio_stop (struct ev_io *w)	1440	ev_io_stop (EV_P_ ev_io *w)
764	{	1441	{
765	ev_clear ((W)w);	1442	ev_clear_pending (EV_A_ (W)w);
766	if (!ev_is_active (w))	1443	if (expect_false (!ev_is_active (w)))
767	return;	1444	return;
		1445
		1446	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
768		1447
769	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1448	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
770	ev_stop ((W)w);	1449	ev_stop (EV_A_ (W)w);
771		1450
772	fd_change (w->fd);	1451	fd_change (EV_A_ w->fd);
773	}	1452	}
774		1453
775	void	1454	void
776	evtimer_start (struct ev_timer *w)	1455	ev_timer_start (EV_P_ ev_timer *w)
777	{	1456	{
778	if (ev_is_active (w))	1457	if (expect_false (ev_is_active (w)))
779	return;	1458	return;
780		1459
781	w->at += now;	1460	((WT)w)->at += mn_now;
782		1461
783	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1462	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
784		1463
785	ev_start ((W)w, ++timercnt);	1464	ev_start (EV_A_ (W)w, ++timercnt);
786	array_needsize (timers, timermax, timercnt, );	1465	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
787	timers [timercnt - 1] = w;	1466	timers [timercnt - 1] = w;
788	upheap ((WT *)timers, timercnt - 1);	1467	upheap ((WT *)timers, timercnt - 1);
789	}
790		1468
		1469	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1470	}
		1471
791	void	1472	void
792	evtimer_stop (struct ev_timer *w)	1473	ev_timer_stop (EV_P_ ev_timer *w)
793	{	1474	{
794	ev_clear ((W)w);	1475	ev_clear_pending (EV_A_ (W)w);
795	if (!ev_is_active (w))	1476	if (expect_false (!ev_is_active (w)))
796	return;	1477	return;
797		1478
		1479	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1480
798	if (w->active < timercnt--)	1481	if (expect_true (((W)w)->active < timercnt--))
799	{	1482	{
800	timers [w->active - 1] = timers [timercnt];	1483	timers [((W)w)->active - 1] = timers [timercnt];
801	downheap ((WT *)timers, timercnt, w->active - 1);	1484	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
802	}	1485	}
803		1486
804	w->at = w->repeat;	1487	((WT)w)->at -= mn_now;
805		1488
806	ev_stop ((W)w);	1489	ev_stop (EV_A_ (W)w);
807	}	1490	}
808		1491
809	void	1492	void
810	evtimer_again (struct ev_timer *w)	1493	ev_timer_again (EV_P_ ev_timer *w)
811	{	1494	{
812	if (ev_is_active (w))	1495	if (ev_is_active (w))
813	{	1496	{
814	if (w->repeat)	1497	if (w->repeat)
815	{	1498	{
816	w->at = now + w->repeat;	1499	((WT)w)->at = mn_now + w->repeat;
817	downheap ((WT *)timers, timercnt, w->active - 1);	1500	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
818	}	1501	}
819	else	1502	else
820	evtimer_stop (w);	1503	ev_timer_stop (EV_A_ w);
821	}	1504	}
822	else if (w->repeat)	1505	else if (w->repeat)
		1506	{
		1507	w->at = w->repeat;
823	evtimer_start (w);	1508	ev_timer_start (EV_A_ w);
		1509	}
824	}	1510	}
825		1511
		1512	#if EV_PERIODIC_ENABLE
826	void	1513	void
827	evperiodic_start (struct ev_periodic *w)	1514	ev_periodic_start (EV_P_ ev_periodic *w)
828	{	1515	{
829	if (ev_is_active (w))	1516	if (expect_false (ev_is_active (w)))
830	return;	1517	return;
831		1518
832	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1519	if (w->reschedule_cb)
833		1520	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1521	else if (w->interval)
		1522	{
		1523	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
834	/* 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 */
835	if (w->interval)
836	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	}
837		1527
838	ev_start ((W)w, ++periodiccnt);	1528	ev_start (EV_A_ (W)w, ++periodiccnt);
839	array_needsize (periodics, periodicmax, periodiccnt, );	1529	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
840	periodics [periodiccnt - 1] = w;	1530	periodics [periodiccnt - 1] = w;
841	upheap ((WT *)periodics, periodiccnt - 1);	1531	upheap ((WT *)periodics, periodiccnt - 1);
842	}
843		1532
		1533	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1534	}
		1535
844	void	1536	void
845	evperiodic_stop (struct ev_periodic *w)	1537	ev_periodic_stop (EV_P_ ev_periodic *w)
846	{	1538	{
847	ev_clear ((W)w);	1539	ev_clear_pending (EV_A_ (W)w);
848	if (!ev_is_active (w))	1540	if (expect_false (!ev_is_active (w)))
849	return;	1541	return;
850		1542
		1543	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1544
851	if (w->active < periodiccnt--)	1545	if (expect_true (((W)w)->active < periodiccnt--))
852	{	1546	{
853	periodics [w->active - 1] = periodics [periodiccnt];	1547	periodics [((W)w)->active - 1] = periodics [periodiccnt];
854	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1548	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
855	}	1549	}
856		1550
857	ev_stop ((W)w);	1551	ev_stop (EV_A_ (W)w);
858	}	1552	}
859		1553
860	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
861	evsignal_start (struct ev_signal *w)	1568	ev_signal_start (EV_P_ ev_signal *w)
862	{	1569	{
		1570	#if EV_MULTIPLICITY
		1571	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1572	#endif
863	if (ev_is_active (w))	1573	if (expect_false (ev_is_active (w)))
864	return;	1574	return;
865		1575
		1576	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1577
866	ev_start ((W)w, 1);	1578	ev_start (EV_A_ (W)w, 1);
867	array_needsize (signals, signalmax, w->signum, signals_init);	1579	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
868	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1580	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
869		1581
870	if (!w->next)	1582	if (!((WL)w)->next)
871	{	1583	{
		1584	#if _WIN32
		1585	signal (w->signum, sighandler);
		1586	#else
872	struct sigaction sa;	1587	struct sigaction sa;
873	sa.sa_handler = sighandler;	1588	sa.sa_handler = sighandler;
874	sigfillset (&sa.sa_mask);	1589	sigfillset (&sa.sa_mask);
875	sa.sa_flags = 0;	1590	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
876	sigaction (w->signum, &sa, 0);	1591	sigaction (w->signum, &sa, 0);
		1592	#endif
877	}	1593	}
878	}	1594	}
879		1595
880	void	1596	void
881	evsignal_stop (struct ev_signal *w)	1597	ev_signal_stop (EV_P_ ev_signal *w)
882	{	1598	{
883	ev_clear ((W)w);	1599	ev_clear_pending (EV_A_ (W)w);
884	if (!ev_is_active (w))	1600	if (expect_false (!ev_is_active (w)))
885	return;	1601	return;
886		1602
887	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1603	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
888	ev_stop ((W)w);	1604	ev_stop (EV_A_ (W)w);
889		1605
890	if (!signals [w->signum - 1].head)	1606	if (!signals [w->signum - 1].head)
891	signal (w->signum, SIG_DFL);	1607	signal (w->signum, SIG_DFL);
892	}	1608	}
893		1609
894	void evidle_start (struct ev_idle *w)	1610	void
		1611	ev_child_start (EV_P_ ev_child *w)
895	{	1612	{
		1613	#if EV_MULTIPLICITY
		1614	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1615	#endif
896	if (ev_is_active (w))	1616	if (expect_false (ev_is_active (w)))
897	return;	1617	return;
898		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
		1702	ev_idle_start (EV_P_ ev_idle *w)
		1703	{
		1704	if (expect_false (ev_is_active (w)))
		1705	return;
		1706
899	ev_start ((W)w, ++idlecnt);	1707	ev_start (EV_A_ (W)w, ++idlecnt);
900	array_needsize (idles, idlemax, idlecnt, );	1708	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
901	idles [idlecnt - 1] = w;	1709	idles [idlecnt - 1] = w;
902	}	1710	}
903		1711
904	void evidle_stop (struct ev_idle *w)	1712	void
		1713	ev_idle_stop (EV_P_ ev_idle *w)
905	{	1714	{
906	ev_clear ((W)w);	1715	ev_clear_pending (EV_A_ (W)w);
907	if (ev_is_active (w))	1716	if (expect_false (!ev_is_active (w)))
908	return;	1717	return;
909		1718
		1719	{
		1720	int active = ((W)w)->active;
910	idles [w->active - 1] = idles [--idlecnt];	1721	idles [active - 1] = idles [--idlecnt];
		1722	((W)idles [active - 1])->active = active;
		1723	}
		1724
911	ev_stop ((W)w);	1725	ev_stop (EV_A_ (W)w);
912	}	1726	}
913		1727
		1728	void
914	void evprepare_start (struct ev_prepare *w)	1729	ev_prepare_start (EV_P_ ev_prepare *w)
915	{	1730	{
916	if (ev_is_active (w))	1731	if (expect_false (ev_is_active (w)))
917	return;	1732	return;
918		1733
919	ev_start ((W)w, ++preparecnt);	1734	ev_start (EV_A_ (W)w, ++preparecnt);
920	array_needsize (prepares, preparemax, preparecnt, );	1735	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
921	prepares [preparecnt - 1] = w;	1736	prepares [preparecnt - 1] = w;
922	}	1737	}
923		1738
		1739	void
924	void evprepare_stop (struct ev_prepare *w)	1740	ev_prepare_stop (EV_P_ ev_prepare *w)
925	{	1741	{
926	ev_clear ((W)w);	1742	ev_clear_pending (EV_A_ (W)w);
927	if (ev_is_active (w))	1743	if (expect_false (!ev_is_active (w)))
928	return;	1744	return;
929		1745
		1746	{
		1747	int active = ((W)w)->active;
930	prepares [w->active - 1] = prepares [--preparecnt];	1748	prepares [active - 1] = prepares [--preparecnt];
		1749	((W)prepares [active - 1])->active = active;
		1750	}
		1751
931	ev_stop ((W)w);	1752	ev_stop (EV_A_ (W)w);
932	}	1753	}
933		1754
		1755	void
934	void evcheck_start (struct ev_check *w)	1756	ev_check_start (EV_P_ ev_check *w)
935	{	1757	{
936	if (ev_is_active (w))	1758	if (expect_false (ev_is_active (w)))
937	return;	1759	return;
938		1760
939	ev_start ((W)w, ++checkcnt);	1761	ev_start (EV_A_ (W)w, ++checkcnt);
940	array_needsize (checks, checkmax, checkcnt, );	1762	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
941	checks [checkcnt - 1] = w;	1763	checks [checkcnt - 1] = w;
942	}	1764	}
943		1765
		1766	void
944	void evcheck_stop (struct ev_check *w)	1767	ev_check_stop (EV_P_ ev_check *w)
945	{	1768	{
946	ev_clear ((W)w);	1769	ev_clear_pending (EV_A_ (W)w);
947	if (ev_is_active (w))	1770	if (expect_false (!ev_is_active (w)))
948	return;	1771	return;
949		1772
		1773	{
		1774	int active = ((W)w)->active;
950	checks [w->active - 1] = checks [--checkcnt];	1775	checks [active - 1] = checks [--checkcnt];
		1776	((W)checks [active - 1])->active = active;
		1777	}
		1778
951	ev_stop ((W)w);	1779	ev_stop (EV_A_ (W)w);
952	}	1780	}
953		1781
954	void evchild_start (struct ev_child *w)	1782	#if EV_EMBED_ENABLE
		1783	void noinline
		1784	ev_embed_sweep (EV_P_ ev_embed *w)
955	{	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
956	if (ev_is_active (w))	1794	if (ev_cb (w))
957	return;	1795	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		1796	else
		1797	ev_embed_sweep (loop, w);
		1798	}
958		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
959	ev_start ((W)w, 1);	1815	ev_start (EV_A_ (W)w, 1);
960	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
961	}	1816	}
962		1817
963	void evchild_stop (struct ev_child *w)	1818	void
		1819	ev_embed_stop (EV_P_ ev_embed *w)
964	{	1820	{
965	ev_clear ((W)w);	1821	ev_clear_pending (EV_A_ (W)w);
966	if (ev_is_active (w))	1822	if (expect_false (!ev_is_active (w)))
967	return;	1823	return;
968		1824
969	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1825	ev_io_stop (EV_A_ &w->io);
		1826
970	ev_stop ((W)w);	1827	ev_stop (EV_A_ (W)w);
971	}	1828	}
		1829	#endif
972		1830
973	/*****************************************************************************/	1831	/*****************************************************************************/
974		1832
975	struct ev_once	1833	struct ev_once
976	{	1834	{
977	struct ev_io io;	1835	ev_io io;
978	struct ev_timer to;	1836	ev_timer to;
979	void (cb)(int revents, void arg);	1837	void (cb)(int revents, void arg);
980	void *arg;	1838	void *arg;
981	};	1839	};
982		1840
983	static void	1841	static void
984	once_cb (struct ev_once *once, int revents)	1842	once_cb (EV_P_ struct ev_once *once, int revents)
985	{	1843	{
986	void (cb)(int revents, void arg) = once->cb;	1844	void (cb)(int revents, void arg) = once->cb;
987	void *arg = once->arg;	1845	void *arg = once->arg;
988		1846
989	evio_stop (&once->io);	1847	ev_io_stop (EV_A_ &once->io);
990	evtimer_stop (&once->to);	1848	ev_timer_stop (EV_A_ &once->to);
991	free (once);	1849	ev_free (once);
992		1850
993	cb (revents, arg);	1851	cb (revents, arg);
994	}	1852	}
995		1853
996	static void	1854	static void
997	once_cb_io (struct ev_io *w, int revents)	1855	once_cb_io (EV_P_ ev_io *w, int revents)
998	{	1856	{
999	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);
1000	}	1858	}
1001		1859
1002	static void	1860	static void
1003	once_cb_to (struct ev_timer *w, int revents)	1861	once_cb_to (EV_P_ ev_timer *w, int revents)
1004	{	1862	{
1005	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);
1006	}	1864	}
1007		1865
1008	void	1866	void
1009	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)
1010	{	1868	{
1011	struct ev_once *once = malloc (sizeof (struct ev_once));	1869	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
1012		1870
1013	if (!once)	1871	if (expect_false (!once))
1014	cb (EV_ERROR, arg);	1872	{
1015	else	1873	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1874	return;
1016	{	1875	}
		1876
1017	once->cb = cb;	1877	once->cb = cb;
1018	once->arg = arg;	1878	once->arg = arg;
1019		1879
1020	evw_init (&once->io, once_cb_io);	1880	ev_init (&once->io, once_cb_io);
1021
1022	if (fd >= 0)	1881	if (fd >= 0)
1023	{	1882	{
1024	evio_set (&once->io, fd, events);	1883	ev_io_set (&once->io, fd, events);
1025	evio_start (&once->io);	1884	ev_io_start (EV_A_ &once->io);
1026	}	1885	}
1027		1886
1028	evw_init (&once->to, once_cb_to);	1887	ev_init (&once->to, once_cb_to);
1029
1030	if (timeout >= 0.)	1888	if (timeout >= 0.)
1031	{	1889	{
1032	evtimer_set (&once->to, timeout, 0.);	1890	ev_timer_set (&once->to, timeout, 0.);
1033	evtimer_start (&once->to);	1891	ev_timer_start (EV_A_ &once->to);
1034	}
1035	}
1036	}
1037
1038	/*****************************************************************************/
1039
1040	#if 0
1041
1042	struct ev_io wio;
1043
1044	static void
1045	sin_cb (struct ev_io *w, int revents)
1046	{
1047	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1048	}
1049
1050	static void
1051	ocb (struct ev_timer *w, int revents)
1052	{
1053	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1054	evtimer_stop (w);
1055	evtimer_start (w);
1056	}
1057
1058	static void
1059	scb (struct ev_signal *w, int revents)
1060	{
1061	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1062	evio_stop (&wio);
1063	evio_start (&wio);
1064	}
1065
1066	static void
1067	gcb (struct ev_signal *w, int revents)
1068	{
1069	fprintf (stderr, "generic %x\n", revents);
1070
1071	}
1072
1073	int main (void)
1074	{
1075	ev_init (0);
1076
1077	evio_init (&wio, sin_cb, 0, EV_READ);
1078	evio_start (&wio);
1079
1080	struct ev_timer t[10000];
1081
1082	#if 0
1083	int i;
1084	for (i = 0; i < 10000; ++i)
1085	{	1892	}
1086	struct ev_timer *w = t + i;
1087	evw_init (w, ocb, i);
1088	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1089	evtimer_start (w);
1090	if (drand48 () < 0.5)
1091	evtimer_stop (w);
1092	}
1093	#endif
1094
1095	struct ev_timer t1;
1096	evtimer_init (&t1, ocb, 5, 10);
1097	evtimer_start (&t1);
1098
1099	struct ev_signal sig;
1100	evsignal_init (&sig, scb, SIGQUIT);
1101	evsignal_start (&sig);
1102
1103	struct ev_check cw;
1104	evcheck_init (&cw, gcb);
1105	evcheck_start (&cw);
1106
1107	struct ev_idle iw;
1108	evidle_init (&iw, gcb);
1109	evidle_start (&iw);
1110
1111	ev_loop (0);
1112
1113	return 0;
1114	}	1893	}
1115		1894
		1895	#ifdef __cplusplus
		1896	}
1116	#endif	1897	#endif
1117		1898
1118
1119
1120

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Comparing libev/ev.c (file contents): Revision 1.27 by root, Wed Oct 31 22:16:36 2007 UTC vs. Revision 1.145 by root, Tue Nov 27 08:54:38 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.27 by root, Wed Oct 31 22:16:36 2007 UTC vs.
Revision 1.145 by root, Tue Nov 27 08:54:38 2007 UTC