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

Comparing libev/ev.c (file contents):
Revision 1.29 by root, Thu Nov 1 08:10:03 2007 UTC vs.
Revision 1.141 by root, Mon Nov 26 20:33:58 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
		168	#ifndef CLOCK_REALTIME
63	#ifndef EV_USE_REALTIME	169	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	170	# define EV_USE_REALTIME 0
65	#endif	171	#endif
		172
		173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
		175	#endif
		176
		177	/**/
66		178
67	#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) */
68	#define MAX_BLOCKTIME 59.731	180	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
69	#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 */
70		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
71	#include "ev.h"	187	# include "ev.h"
		188	#endif
72		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
73	typedef struct ev_watcher *W;	216	typedef ev_watcher *W;
74	typedef struct ev_watcher_list *WL;	217	typedef ev_watcher_list *WL;
75	typedef struct ev_watcher_time *WT;	218	typedef ev_watcher_time *WT;
76		219
77	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
78	ev_tstamp ev_now;	311	ev_tstamp ev_rt_now;
79	int ev_method;	312	#define VAR(name,decl) static decl;
		313	#include "ev_vars.h"
		314	#undef VAR
80		315
81	static int have_monotonic; /* runtime */	316	static int ev_default_loop_ptr;
82		317
83	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	318	#endif
84	static void (*method_modify)(int fd, int oev, int nev);
85	static void (*method_poll)(ev_tstamp timeout);
86		319
87	/*****************************************************************************/	320	/*****************************************************************************/
88		321
89	ev_tstamp	322	ev_tstamp
90	ev_time (void)	323	ev_time (void)
…		…
98	gettimeofday (&tv, 0);	331	gettimeofday (&tv, 0);
99	return tv.tv_sec + tv.tv_usec * 1e-6;	332	return tv.tv_sec + tv.tv_usec * 1e-6;
100	#endif	333	#endif
101	}	334	}
102		335
103	static ev_tstamp	336	ev_tstamp inline_size
104	get_clock (void)	337	get_clock (void)
105	{	338	{
106	#if EV_USE_MONOTONIC	339	#if EV_USE_MONOTONIC
107	if (have_monotonic)	340	if (expect_true (have_monotonic))
108	{	341	{
109	struct timespec ts;	342	struct timespec ts;
110	clock_gettime (CLOCK_MONOTONIC, &ts);	343	clock_gettime (CLOCK_MONOTONIC, &ts);
111	return ts.tv_sec + ts.tv_nsec * 1e-9;	344	return ts.tv_sec + ts.tv_nsec * 1e-9;
112	}	345	}
113	#endif	346	#endif
114		347
115	return ev_time ();	348	return ev_time ();
116	}	349	}
117		350
		351	#if EV_MULTIPLICITY
		352	ev_tstamp
		353	ev_now (EV_P)
		354	{
		355	return ev_rt_now;
		356	}
		357	#endif
		358
118	#define array_nextsize(n) (((n) << 1) \| 4 & ~3)	359	#define array_roundsize(type,n) (((n) \| 4) & ~3)
119	#define array_prevsize(n) (((n) >> 1) \| 4 & ~3)
120		360
121	#define array_needsize(base,cur,cnt,init) \	361	#define array_needsize(type,base,cur,cnt,init) \
122	if ((cnt) > cur) \	362	if (expect_false ((cnt) > cur)) \
123	{ \	363	{ \
124	int newcnt = cur; \	364	int newcnt = cur; \
125	do \	365	do \
126	{ \	366	{ \
127	newcnt = array_nextsize (newcnt); \	367	newcnt = array_roundsize (type, newcnt << 1); \
128	} \	368	} \
129	while ((cnt) > newcnt); \	369	while ((cnt) > newcnt); \
130	\	370	\
131	base = realloc (base, sizeof (base) (newcnt)); \	371	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
132	init (base + cur, newcnt - cur); \	372	init (base + cur, newcnt - cur); \
133	cur = newcnt; \	373	cur = newcnt; \
134	}	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;
135		386
136	/*****************************************************************************/	387	/*****************************************************************************/
137		388
138	typedef struct	389	void noinline
		390	ev_feed_event (EV_P_ void *w, int revents)
139	{	391	{
140	struct ev_io *head;	392	W w_ = (W)w;
141	int events;
142	} ANFD;
143		393
144	static ANFD *anfds;	394	if (expect_false (w_->pending))
145	static int anfdmax;	395	{
		396	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		397	return;
		398	}
146		399
147	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
148	anfds_init (ANFD *base, int count)	418	anfds_init (ANFD *base, int count)
149	{	419	{
150	while (count--)	420	while (count--)
151	{	421	{
152	base->head = 0;	422	base->head = 0;
153	base->events = EV_NONE;	423	base->events = EV_NONE;
		424	base->reify = 0;
		425
154	++base;	426	++base;
155	}	427	}
156	}	428	}
157		429
158	typedef struct	430	void inline_speed
159	{
160	W w;
161	int events;
162	} ANPENDING;
163
164	static ANPENDING *pendings;
165	static int pendingmax, pendingcnt;
166
167	static void
168	event (W w, int events)
169	{
170	if (w->active)
171	{
172	w->pending = ++pendingcnt;
173	array_needsize (pendings, pendingmax, pendingcnt, );
174	pendings [pendingcnt - 1].w = w;
175	pendings [pendingcnt - 1].events = events;
176	}
177	}
178
179	static void
180	queue_events (W *events, int eventcnt, int type)
181	{
182	int i;
183
184	for (i = 0; i < eventcnt; ++i)
185	event (events [i], type);
186	}
187
188	static void
189	fd_event (int fd, int events)	431	fd_event (EV_P_ int fd, int revents)
190	{	432	{
191	ANFD *anfd = anfds + fd;	433	ANFD *anfd = anfds + fd;
192	struct ev_io *w;	434	ev_io *w;
193		435
194	for (w = anfd->head; w; w = w->next)	436	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
195	{	437	{
196	int ev = w->events & events;	438	int ev = w->events & revents;
197		439
198	if (ev)	440	if (ev)
199	event ((W)w, ev);	441	ev_feed_event (EV_A_ (W)w, ev);
200	}	442	}
201	}	443	}
202		444
203	/*****************************************************************************/	445	void
		446	ev_feed_fd_event (EV_P_ int fd, int revents)
		447	{
		448	fd_event (EV_A_ fd, revents);
		449	}
204		450
205	static int *fdchanges;	451	void inline_size
206	static int fdchangemax, fdchangecnt;	452	fd_reify (EV_P)
207
208	static void
209	fd_reify (void)
210	{	453	{
211	int i;	454	int i;
212		455
213	for (i = 0; i < fdchangecnt; ++i)	456	for (i = 0; i < fdchangecnt; ++i)
214	{	457	{
215	int fd = fdchanges [i];	458	int fd = fdchanges [i];
216	ANFD *anfd = anfds + fd;	459	ANFD *anfd = anfds + fd;
217	struct ev_io *w;	460	ev_io *w;
218		461
219	int events = 0;	462	int events = 0;
220		463
221	for (w = anfd->head; w; w = w->next)	464	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
222	events \|= w->events;	465	events \|= w->events;
223		466
224	anfd->events &= ~EV_REIFY;	467	#if EV_SELECT_IS_WINSOCKET
225		468	if (events)
226	if (anfd->events != events)
227	{	469	{
228	method_modify (fd, anfd->events, events);	470	unsigned long argp;
229	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));
230	}	473	}
		474	#endif
		475
		476	anfd->reify = 0;
		477
		478	backend_modify (EV_A_ fd, anfd->events, events);
		479	anfd->events = events;
231	}	480	}
232		481
233	fdchangecnt = 0;	482	fdchangecnt = 0;
234	}	483	}
235		484
236	static void	485	void inline_size
237	fd_change (int fd)	486	fd_change (EV_P_ int fd)
238	{	487	{
239	if (anfds [fd].events & EV_REIFY \|\| fdchangecnt < 0)	488	if (expect_false (anfds [fd].reify))
240	return;	489	return;
241		490
242	anfds [fd].events \|= EV_REIFY;	491	anfds [fd].reify = 1;
243		492
244	++fdchangecnt;	493	++fdchangecnt;
245	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	494	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
246	fdchanges [fdchangecnt - 1] = fd;	495	fdchanges [fdchangecnt - 1] = fd;
247	}	496	}
248		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
249	/* called on EBADF to verify fds */	520	/* called on EBADF to verify fds */
250	static void	521	static void noinline
251	fd_recheck (void)	522	fd_ebadf (EV_P)
252	{	523	{
253	int fd;	524	int fd;
254		525
255	for (fd = 0; fd < anfdmax; ++fd)	526	for (fd = 0; fd < anfdmax; ++fd)
256	if (anfds [fd].events)	527	if (anfds [fd].events)
257	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	528	if (!fd_valid (fd) == -1 && errno == EBADF)
258	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)
259	{	540	{
260	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT);	541	fd_kill (EV_A_ fd);
261	ev_io_stop (anfds [fd].head);	542	return;
262	}	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	}
263	}	559	}
264		560
265	/*****************************************************************************/	561	/*****************************************************************************/
266		562
267	static struct ev_timer **timers;	563	void inline_speed
268	static int timermax, timercnt;
269
270	static struct ev_periodic **periodics;
271	static int periodicmax, periodiccnt;
272
273	static void
274	upheap (WT *timers, int k)	564	upheap (WT *heap, int k)
275	{	565	{
276	WT w = timers [k];	566	WT w = heap [k];
277		567
278	while (k && timers [k >> 1]->at > w->at)	568	while (k && heap [k >> 1]->at > w->at)
279	{	569	{
280	timers [k] = timers [k >> 1];	570	heap [k] = heap [k >> 1];
281	timers [k]->active = k + 1;	571	((W)heap [k])->active = k + 1;
282	k >>= 1;	572	k >>= 1;
283	}	573	}
284		574
285	timers [k] = w;	575	heap [k] = w;
286	timers [k]->active = k + 1;	576	((W)heap [k])->active = k + 1;
287		577
288	}	578	}
289		579
290	static void	580	void inline_speed
291	downheap (WT *timers, int N, int k)	581	downheap (WT *heap, int N, int k)
292	{	582	{
293	WT w = timers [k];	583	WT w = heap [k];
294		584
295	while (k < (N >> 1))	585	while (k < (N >> 1))
296	{	586	{
297	int j = k << 1;	587	int j = k << 1;
298		588
299	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	589	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
300	++j;	590	++j;
301		591
302	if (w->at <= timers [j]->at)	592	if (w->at <= heap [j]->at)
303	break;	593	break;
304		594
305	timers [k] = timers [j];	595	heap [k] = heap [j];
306	timers [k]->active = k + 1;	596	((W)heap [k])->active = k + 1;
307	k = j;	597	k = j;
308	}	598	}
309		599
310	timers [k] = w;	600	heap [k] = w;
311	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);
312	}	609	}
313		610
314	/*****************************************************************************/	611	/*****************************************************************************/
315		612
316	typedef struct	613	typedef struct
317	{	614	{
318	struct ev_signal *head;	615	WL head;
319	sig_atomic_t gotsig;	616	sig_atomic_t volatile gotsig;
320	} ANSIG;	617	} ANSIG;
321		618
322	static ANSIG *signals;	619	static ANSIG *signals;
323	static int signalmax;	620	static int signalmax;
324		621
325	static int sigpipe [2];	622	static int sigpipe [2];
326	static sig_atomic_t gotsig;	623	static sig_atomic_t volatile gotsig;
327	static struct ev_io sigev;	624	static ev_io sigev;
328		625
329	static void	626	void inline_size
330	signals_init (ANSIG *base, int count)	627	signals_init (ANSIG *base, int count)
331	{	628	{
332	while (count--)	629	while (count--)
333	{	630	{
334	base->head = 0;	631	base->head = 0;
335	base->gotsig = 0;	632	base->gotsig = 0;
		633
336	++base;	634	++base;
337	}	635	}
338	}	636	}
339		637
340	static void	638	static void
341	sighandler (int signum)	639	sighandler (int signum)
342	{	640	{
		641	#if _WIN32
		642	signal (signum, sighandler);
		643	#endif
		644
343	signals [signum - 1].gotsig = 1;	645	signals [signum - 1].gotsig = 1;
344		646
345	if (!gotsig)	647	if (!gotsig)
346	{	648	{
		649	int old_errno = errno;
347	gotsig = 1;	650	gotsig = 1;
348	write (sigpipe [1], &gotsig, 1);	651	write (sigpipe [1], &signum, 1);
		652	errno = old_errno;
349	}	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);
350	}	674	}
351		675
352	static void	676	static void
353	sigcb (struct ev_io *iow, int revents)	677	sigcb (EV_P_ ev_io *iow, int revents)
354	{	678	{
355	struct ev_signal *w;
356	int sig;	679	int signum;
357		680
		681	read (sigpipe [0], &revents, 1);
358	gotsig = 0;	682	gotsig = 0;
359	read (sigpipe [0], &revents, 1);
360		683
361	for (sig = signalmax; sig--; )	684	for (signum = signalmax; signum--; )
362	if (signals [sig].gotsig)	685	if (signals [signum].gotsig)
363	{	686	ev_feed_signal_event (EV_A_ signum + 1);
364	signals [sig].gotsig = 0;
365
366	for (w = signals [sig].head; w; w = w->next)
367	event ((W)w, EV_SIGNAL);
368	}
369	}	687	}
370		688
371	static void	689	void inline_size
372	siginit (void)	690	fd_intern (int fd)
373	{	691	{
		692	#ifdef _WIN32
		693	int arg = 1;
		694	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		695	#else
374	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	696	fcntl (fd, F_SETFD, FD_CLOEXEC);
375	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
376
377	/* rather than sort out wether we really need nb, set it */
378	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	697	fcntl (fd, F_SETFL, O_NONBLOCK);
379	fcntl (sigpipe [1], 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]);
380		706
381	ev_io_set (&sigev, sigpipe [0], EV_READ);	707	ev_io_set (&sigev, sigpipe [0], EV_READ);
382	ev_io_start (&sigev);	708	ev_io_start (EV_A_ &sigev);
		709	ev_unref (EV_A); /* child watcher should not keep loop alive */
383	}	710	}
384		711
385	/*****************************************************************************/	712	/*****************************************************************************/
386		713
387	static struct ev_idle **idles;
388	static int idlemax, idlecnt;
389
390	static struct ev_prepare **prepares;
391	static int preparemax, preparecnt;
392
393	static struct ev_check **checks;
394	static int checkmax, checkcnt;
395
396	/*****************************************************************************/
397
398	static struct ev_child *childs [PID_HASHSIZE];	714	static ev_child *childs [PID_HASHSIZE];
		715
		716	#ifndef _WIN32
		717
399	static struct ev_signal childev;	718	static ev_signal childev;
400		719
401	#ifndef WCONTINUED	720	#ifndef WCONTINUED
402	# define WCONTINUED 0	721	# define WCONTINUED 0
403	#endif	722	#endif
404		723
		724	void inline_speed
		725	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		726	{
		727	ev_child *w;
		728
		729	for (w = (ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)
		730	if (w->pid == pid \|\| !w->pid)
		731	{
		732	ev_priority (w) = ev_priority (sw); /* need to do it now */
		733	w->rpid = pid;
		734	w->rstatus = status;
		735	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		736	}
		737	}
		738
405	static void	739	static void
406	childcb (struct ev_signal *sw, int revents)	740	childcb (EV_P_ ev_signal *sw, int revents)
407	{	741	{
408	struct ev_child *w;
409	int pid, status;	742	int pid, status;
410		743
411	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	744	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
412	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	745	{
413	if (w->pid == pid \|\| w->pid == -1)	746	/* make sure we are called again until all childs have been reaped */
414	{	747	/* we need to do it this way so that the callback gets called before we continue */
415	w->status = status;	748	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
416	event ((W)w, EV_CHILD);	749
417	}	750	child_reap (EV_A_ sw, pid, pid, status);
		751	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		752	}
418	}	753	}
		754
		755	#endif
419		756
420	/*****************************************************************************/	757	/*****************************************************************************/
421		758
		759	#if EV_USE_PORT
		760	# include "ev_port.c"
		761	#endif
		762	#if EV_USE_KQUEUE
		763	# include "ev_kqueue.c"
		764	#endif
422	#if EV_USE_EPOLL	765	#if EV_USE_EPOLL
423	# include "ev_epoll.c"	766	# include "ev_epoll.c"
424	#endif	767	#endif
		768	#if EV_USE_POLL
		769	# include "ev_poll.c"
		770	#endif
425	#if EV_USE_SELECT	771	#if EV_USE_SELECT
426	# include "ev_select.c"	772	# include "ev_select.c"
427	#endif	773	#endif
428		774
429	int	775	int
…		…
436	ev_version_minor (void)	782	ev_version_minor (void)
437	{	783	{
438	return EV_VERSION_MINOR;	784	return EV_VERSION_MINOR;
439	}	785	}
440		786
441	int ev_init (int flags)	787	/* return true if we are running with elevated privileges and should ignore env variables */
		788	int inline_size
		789	enable_secure (void)
442	{	790	{
443	if (!ev_method)	791	#ifdef _WIN32
		792	return 0;
		793	#else
		794	return getuid () != geteuid ()
		795	\|\| getgid () != getegid ();
		796	#endif
		797	}
		798
		799	unsigned int
		800	ev_supported_backends (void)
		801	{
		802	unsigned int flags = 0;
		803
		804	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
		805	if (EV_USE_KQUEUE) flags \|= EVBACKEND_KQUEUE;
		806	if (EV_USE_EPOLL ) flags \|= EVBACKEND_EPOLL;
		807	if (EV_USE_POLL ) flags \|= EVBACKEND_POLL;
		808	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
		809
		810	return flags;
		811	}
		812
		813	unsigned int
		814	ev_recommended_backends (void)
		815	{
		816	unsigned int flags = ev_supported_backends ();
		817
		818	#ifndef __NetBSD__
		819	/* kqueue is borked on everything but netbsd apparently */
		820	/* it usually doesn't work correctly on anything but sockets and pipes */
		821	flags &= ~EVBACKEND_KQUEUE;
		822	#endif
		823	#ifdef __APPLE__
		824	// flags &= ~EVBACKEND_KQUEUE; for documentation
		825	flags &= ~EVBACKEND_POLL;
		826	#endif
		827
		828	return flags;
		829	}
		830
		831	unsigned int
		832	ev_embeddable_backends (void)
		833	{
		834	return EVBACKEND_EPOLL
		835	\| EVBACKEND_KQUEUE
		836	\| EVBACKEND_PORT;
		837	}
		838
		839	unsigned int
		840	ev_backend (EV_P)
		841	{
		842	return backend;
		843	}
		844
		845	static void
		846	loop_init (EV_P_ unsigned int flags)
		847	{
		848	if (!backend)
444	{	849	{
445	#if EV_USE_MONOTONIC	850	#if EV_USE_MONOTONIC
446	{	851	{
447	struct timespec ts;	852	struct timespec ts;
448	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	853	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
449	have_monotonic = 1;	854	have_monotonic = 1;
450	}	855	}
451	#endif	856	#endif
452		857
453	ev_now = ev_time ();	858	ev_rt_now = ev_time ();
454	now = get_clock ();	859	mn_now = get_clock ();
		860	now_floor = mn_now;
455	diff = ev_now - now;	861	rtmn_diff = ev_rt_now - mn_now;
456		862
457	if (pipe (sigpipe))	863	if (!(flags & EVFLAG_NOENV)
458	return 0;	864	&& !enable_secure ()
		865	&& getenv ("LIBEV_FLAGS"))
		866	flags = atoi (getenv ("LIBEV_FLAGS"));
459		867
460	ev_method = EVMETHOD_NONE;	868	if (!(flags & 0x0000ffffUL))
		869	flags \|= ev_recommended_backends ();
		870
		871	backend = 0;
		872	#if EV_USE_PORT
		873	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		874	#endif
		875	#if EV_USE_KQUEUE
		876	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		877	#endif
461	#if EV_USE_EPOLL	878	#if EV_USE_EPOLL
462	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	879	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		880	#endif
		881	#if EV_USE_POLL
		882	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
463	#endif	883	#endif
464	#if EV_USE_SELECT	884	#if EV_USE_SELECT
465	if (ev_method == EVMETHOD_NONE) select_init (flags);	885	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
466	#endif	886	#endif
467		887
468	if (ev_method)	888	ev_init (&sigev, sigcb);
		889	ev_set_priority (&sigev, EV_MAXPRI);
		890	}
		891	}
		892
		893	static void
		894	loop_destroy (EV_P)
		895	{
		896	int i;
		897
		898	#if EV_USE_PORT
		899	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		900	#endif
		901	#if EV_USE_KQUEUE
		902	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		903	#endif
		904	#if EV_USE_EPOLL
		905	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		906	#endif
		907	#if EV_USE_POLL
		908	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		909	#endif
		910	#if EV_USE_SELECT
		911	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		912	#endif
		913
		914	for (i = NUMPRI; i--; )
		915	array_free (pending, [i]);
		916
		917	/* have to use the microsoft-never-gets-it-right macro */
		918	array_free (fdchange, EMPTY0);
		919	array_free (timer, EMPTY0);
		920	#if EV_PERIODIC_ENABLE
		921	array_free (periodic, EMPTY0);
		922	#endif
		923	array_free (idle, EMPTY0);
		924	array_free (prepare, EMPTY0);
		925	array_free (check, EMPTY0);
		926
		927	backend = 0;
		928	}
		929
		930	static void
		931	loop_fork (EV_P)
		932	{
		933	#if EV_USE_PORT
		934	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		935	#endif
		936	#if EV_USE_KQUEUE
		937	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		938	#endif
		939	#if EV_USE_EPOLL
		940	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		941	#endif
		942
		943	if (ev_is_active (&sigev))
		944	{
		945	/* default loop */
		946
		947	ev_ref (EV_A);
		948	ev_io_stop (EV_A_ &sigev);
		949	close (sigpipe [0]);
		950	close (sigpipe [1]);
		951
		952	while (pipe (sigpipe))
		953	syserr ("(libev) error creating pipe");
		954
		955	siginit (EV_A);
		956	}
		957
		958	postfork = 0;
		959	}
		960
		961	#if EV_MULTIPLICITY
		962	struct ev_loop *
		963	ev_loop_new (unsigned int flags)
		964	{
		965	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		966
		967	memset (loop, 0, sizeof (struct ev_loop));
		968
		969	loop_init (EV_A_ flags);
		970
		971	if (ev_backend (EV_A))
		972	return loop;
		973
		974	return 0;
		975	}
		976
		977	void
		978	ev_loop_destroy (EV_P)
		979	{
		980	loop_destroy (EV_A);
		981	ev_free (loop);
		982	}
		983
		984	void
		985	ev_loop_fork (EV_P)
		986	{
		987	postfork = 1;
		988	}
		989
		990	#endif
		991
		992	#if EV_MULTIPLICITY
		993	struct ev_loop *
		994	ev_default_loop_init (unsigned int flags)
		995	#else
		996	int
		997	ev_default_loop (unsigned int flags)
		998	#endif
		999	{
		1000	if (sigpipe [0] == sigpipe [1])
		1001	if (pipe (sigpipe))
		1002	return 0;
		1003
		1004	if (!ev_default_loop_ptr)
		1005	{
		1006	#if EV_MULTIPLICITY
		1007	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1008	#else
		1009	ev_default_loop_ptr = 1;
		1010	#endif
		1011
		1012	loop_init (EV_A_ flags);
		1013
		1014	if (ev_backend (EV_A))
469	{	1015	{
470	ev_watcher_init (&sigev, sigcb);
471	siginit ();	1016	siginit (EV_A);
472		1017
		1018	#ifndef _WIN32
473	ev_signal_init (&childev, childcb, SIGCHLD);	1019	ev_signal_init (&childev, childcb, SIGCHLD);
		1020	ev_set_priority (&childev, EV_MAXPRI);
474	ev_signal_start (&childev);	1021	ev_signal_start (EV_A_ &childev);
		1022	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1023	#endif
475	}	1024	}
		1025	else
		1026	ev_default_loop_ptr = 0;
476	}	1027	}
477		1028
478	return ev_method;	1029	return ev_default_loop_ptr;
		1030	}
		1031
		1032	void
		1033	ev_default_destroy (void)
		1034	{
		1035	#if EV_MULTIPLICITY
		1036	struct ev_loop *loop = ev_default_loop_ptr;
		1037	#endif
		1038
		1039	#ifndef _WIN32
		1040	ev_ref (EV_A); /* child watcher */
		1041	ev_signal_stop (EV_A_ &childev);
		1042	#endif
		1043
		1044	ev_ref (EV_A); /* signal watcher */
		1045	ev_io_stop (EV_A_ &sigev);
		1046
		1047	close (sigpipe [0]); sigpipe [0] = 0;
		1048	close (sigpipe [1]); sigpipe [1] = 0;
		1049
		1050	loop_destroy (EV_A);
		1051	}
		1052
		1053	void
		1054	ev_default_fork (void)
		1055	{
		1056	#if EV_MULTIPLICITY
		1057	struct ev_loop *loop = ev_default_loop_ptr;
		1058	#endif
		1059
		1060	if (backend)
		1061	postfork = 1;
479	}	1062	}
480		1063
481	/*****************************************************************************/	1064	/*****************************************************************************/
482		1065
483	void	1066	int inline_size
484	ev_prefork (void)	1067	any_pending (EV_P)
485	{	1068	{
486	/* nop */	1069	int pri;
487	}
488		1070
489	void	1071	for (pri = NUMPRI; pri--; )
490	ev_postfork_parent (void)	1072	if (pendingcnt [pri])
491	{	1073	return 1;
492	/* nop */
493	}
494		1074
495	void	1075	return 0;
496	ev_postfork_child (void)
497	{
498	#if EV_USE_EPOLL
499	if (ev_method == EVMETHOD_EPOLL)
500	epoll_postfork_child ();
501	#endif
502
503	ev_io_stop (&sigev);
504	close (sigpipe [0]);
505	close (sigpipe [1]);
506	pipe (sigpipe);
507	siginit ();
508	}	1076	}
509		1077
510	/*****************************************************************************/	1078	void inline_speed
511
512	static void
513	call_pending (void)	1079	call_pending (EV_P)
514	{	1080	{
		1081	int pri;
		1082
		1083	for (pri = NUMPRI; pri--; )
515	while (pendingcnt)	1084	while (pendingcnt [pri])
516	{	1085	{
517	ANPENDING *p = pendings + --pendingcnt;	1086	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
518		1087
519	if (p->w)	1088	if (expect_true (p->w))
520	{	1089	{
		1090	assert (("non-pending watcher on pending list", p->w->pending));
		1091
521	p->w->pending = 0;	1092	p->w->pending = 0;
522	p->w->cb (p->w, p->events);	1093	EV_CB_INVOKE (p->w, p->events);
523	}	1094	}
524	}	1095	}
525	}	1096	}
526		1097
527	static void	1098	void inline_size
528	timers_reify (void)	1099	timers_reify (EV_P)
529	{	1100	{
530	while (timercnt && timers [0]->at <= now)	1101	while (timercnt && ((WT)timers [0])->at <= mn_now)
531	{	1102	{
532	struct ev_timer *w = timers [0];	1103	ev_timer *w = timers [0];
533		1104
534	event ((W)w, EV_TIMEOUT);	1105	assert (("inactive timer on timer heap detected", ev_is_active (w)));
535		1106
536	/* first reschedule or stop timer */	1107	/* first reschedule or stop timer */
537	if (w->repeat)	1108	if (w->repeat)
538	{	1109	{
		1110	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1111
539	w->at = now + w->repeat;	1112	((WT)w)->at += w->repeat;
540	assert (("timer timeout in the past, negative repeat?", w->at > now));	1113	if (((WT)w)->at < mn_now)
		1114	((WT)w)->at = mn_now;
		1115
541	downheap ((WT *)timers, timercnt, 0);	1116	downheap ((WT *)timers, timercnt, 0);
542	}	1117	}
543	else	1118	else
544	ev_timer_stop (w); /* nonrepeating: stop timer */	1119	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
545	}
546	}
547		1120
548	static void	1121	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1122	}
		1123	}
		1124
		1125	#if EV_PERIODIC_ENABLE
		1126	void inline_size
549	periodics_reify (void)	1127	periodics_reify (EV_P)
550	{	1128	{
551	while (periodiccnt && periodics [0]->at <= ev_now)	1129	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
552	{	1130	{
553	struct ev_periodic *w = periodics [0];	1131	ev_periodic *w = periodics [0];
		1132
		1133	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
554		1134
555	/* first reschedule or stop timer */	1135	/* first reschedule or stop timer */
556	if (w->interval)	1136	if (w->reschedule_cb)
557	{	1137	{
		1138	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1139	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1140	downheap ((WT *)periodics, periodiccnt, 0);
		1141	}
		1142	else if (w->interval)
		1143	{
558	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1144	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
559	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1145	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
560	downheap ((WT *)periodics, periodiccnt, 0);	1146	downheap ((WT *)periodics, periodiccnt, 0);
561	}	1147	}
562	else	1148	else
563	ev_periodic_stop (w); /* nonrepeating: stop timer */	1149	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
564		1150
565	event ((W)w, EV_TIMEOUT);	1151	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
566	}	1152	}
567	}	1153	}
568		1154
569	static void	1155	static void noinline
570	periodics_reschedule (ev_tstamp diff)	1156	periodics_reschedule (EV_P)
571	{	1157	{
572	int i;	1158	int i;
573		1159
574	/* adjust periodics after time jump */	1160	/* adjust periodics after time jump */
575	for (i = 0; i < periodiccnt; ++i)	1161	for (i = 0; i < periodiccnt; ++i)
576	{	1162	{
577	struct ev_periodic *w = periodics [i];	1163	ev_periodic *w = periodics [i];
578		1164
		1165	if (w->reschedule_cb)
		1166	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
579	if (w->interval)	1167	else if (w->interval)
		1168	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1169	}
		1170
		1171	/* now rebuild the heap */
		1172	for (i = periodiccnt >> 1; i--; )
		1173	downheap ((WT *)periodics, periodiccnt, i);
		1174	}
		1175	#endif
		1176
		1177	int inline_size
		1178	time_update_monotonic (EV_P)
		1179	{
		1180	mn_now = get_clock ();
		1181
		1182	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1183	{
		1184	ev_rt_now = rtmn_diff + mn_now;
		1185	return 0;
		1186	}
		1187	else
		1188	{
		1189	now_floor = mn_now;
		1190	ev_rt_now = ev_time ();
		1191	return 1;
		1192	}
		1193	}
		1194
		1195	void inline_size
		1196	time_update (EV_P)
		1197	{
		1198	int i;
		1199
		1200	#if EV_USE_MONOTONIC
		1201	if (expect_true (have_monotonic))
		1202	{
		1203	if (time_update_monotonic (EV_A))
580	{	1204	{
581	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1205	ev_tstamp odiff = rtmn_diff;
582		1206
583	if (fabs (diff) >= 1e-4)	1207	/* loop a few times, before making important decisions.
		1208	* on the choice of "4": one iteration isn't enough,
		1209	* in case we get preempted during the calls to
		1210	* ev_time and get_clock. a second call is almost guarenteed
		1211	* to succeed in that case, though. and looping a few more times
		1212	* doesn't hurt either as we only do this on time-jumps or
		1213	* in the unlikely event of getting preempted here.
		1214	*/
		1215	for (i = 4; --i; )
584	{	1216	{
585	ev_periodic_stop (w);	1217	rtmn_diff = ev_rt_now - mn_now;
586	ev_periodic_start (w);
587		1218
588	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1219	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1220	return; /* all is well */
		1221
		1222	ev_rt_now = ev_time ();
		1223	mn_now = get_clock ();
		1224	now_floor = mn_now;
589	}	1225	}
		1226
		1227	# if EV_PERIODIC_ENABLE
		1228	periodics_reschedule (EV_A);
		1229	# endif
		1230	/* no timer adjustment, as the monotonic clock doesn't jump */
		1231	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
590	}	1232	}
591	}	1233	}
592	}	1234	else
593		1235	#endif
594	static void	1236	{
595	time_update (void)
596	{
597	int i;
598
599	ev_now = ev_time ();	1237	ev_rt_now = ev_time ();
600		1238
601	if (have_monotonic)	1239	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
602	{
603	ev_tstamp odiff = diff;
604
605	for (i = 4; --i; ) /* loop a few times, before making important decisions */
606	{	1240	{
607	now = get_clock ();	1241	#if EV_PERIODIC_ENABLE
608	diff = ev_now - now;
609
610	if (fabs (odiff - diff) < MIN_TIMEJUMP)
611	return; /* all is well */
612
613	ev_now = ev_time ();
614	}
615
616	periodics_reschedule (diff - odiff);
617	/* no timer adjustment, as the monotonic clock doesn't jump */
618	}
619	else
620	{
621	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
622	{
623	periodics_reschedule (ev_now - now);	1242	periodics_reschedule (EV_A);
		1243	#endif
624		1244
625	/* adjust timers. this is easy, as the offset is the same for all */	1245	/* adjust timers. this is easy, as the offset is the same for all */
626	for (i = 0; i < timercnt; ++i)	1246	for (i = 0; i < timercnt; ++i)
627	timers [i]->at += diff;	1247	((WT)timers [i])->at += ev_rt_now - mn_now;
628	}	1248	}
629		1249
630	now = ev_now;	1250	mn_now = ev_rt_now;
631	}	1251	}
632	}	1252	}
633		1253
634	int ev_loop_done;	1254	void
		1255	ev_ref (EV_P)
		1256	{
		1257	++activecnt;
		1258	}
635		1259
		1260	void
		1261	ev_unref (EV_P)
		1262	{
		1263	--activecnt;
		1264	}
		1265
		1266	static int loop_done;
		1267
		1268	void
636	void ev_loop (int flags)	1269	ev_loop (EV_P_ int flags)
637	{	1270	{
638	double block;
639	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	1271	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)
		1272	? EVUNLOOP_ONE
		1273	: EVUNLOOP_CANCEL;
640		1274
641	do	1275	while (activecnt)
642	{	1276	{
643	/* queue check watchers (and execute them) */	1277	/* queue check watchers (and execute them) */
644	if (preparecnt)	1278	if (expect_false (preparecnt))
645	{	1279	{
646	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1280	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
647	call_pending ();	1281	call_pending (EV_A);
648	}	1282	}
649		1283
		1284	/* we might have forked, so reify kernel state if necessary */
		1285	if (expect_false (postfork))
		1286	loop_fork (EV_A);
		1287
650	/* update fd-related kernel structures */	1288	/* update fd-related kernel structures */
651	fd_reify ();	1289	fd_reify (EV_A);
652		1290
653	/* calculate blocking time */	1291	/* calculate blocking time */
		1292	{
		1293	double block;
654		1294
655	/* we only need this for !monotonic clockor timers, but as we basically
656	always have timers, we just calculate it always */
657	ev_now = ev_time ();
658
659	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1295	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
660	block = 0.;	1296	block = 0.; /* do not block at all */
661	else	1297	else
662	{	1298	{
		1299	/* update time to cancel out callback processing overhead */
		1300	#if EV_USE_MONOTONIC
		1301	if (expect_true (have_monotonic))
		1302	time_update_monotonic (EV_A);
		1303	else
		1304	#endif
		1305	{
		1306	ev_rt_now = ev_time ();
		1307	mn_now = ev_rt_now;
		1308	}
		1309
663	block = MAX_BLOCKTIME;	1310	block = MAX_BLOCKTIME;
664		1311
665	if (timercnt)	1312	if (timercnt)
666	{	1313	{
667	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1314	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
668	if (block > to) block = to;	1315	if (block > to) block = to;
669	}	1316	}
670		1317
		1318	#if EV_PERIODIC_ENABLE
671	if (periodiccnt)	1319	if (periodiccnt)
672	{	1320	{
673	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1321	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
674	if (block > to) block = to;	1322	if (block > to) block = to;
675	}	1323	}
		1324	#endif
676		1325
677	if (block < 0.) block = 0.;	1326	if (expect_false (block < 0.)) block = 0.;
678	}	1327	}
679		1328
680	method_poll (block);	1329	backend_poll (EV_A_ block);
		1330	}
681		1331
682	/* update ev_now, do magic */	1332	/* update ev_rt_now, do magic */
683	time_update ();	1333	time_update (EV_A);
684		1334
685	/* queue pending timers and reschedule them */	1335	/* queue pending timers and reschedule them */
686	timers_reify (); /* relative timers called last */	1336	timers_reify (EV_A); /* relative timers called last */
		1337	#if EV_PERIODIC_ENABLE
687	periodics_reify (); /* absolute timers called first */	1338	periodics_reify (EV_A); /* absolute timers called first */
		1339	#endif
688		1340
689	/* queue idle watchers unless io or timers are pending */	1341	/* queue idle watchers unless other events are pending */
690	if (!pendingcnt)	1342	if (idlecnt && !any_pending (EV_A))
691	queue_events ((W *)idles, idlecnt, EV_IDLE);	1343	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
692		1344
693	/* queue check watchers, to be executed first */	1345	/* queue check watchers, to be executed first */
694	if (checkcnt)	1346	if (expect_false (checkcnt))
695	queue_events ((W *)checks, checkcnt, EV_CHECK);	1347	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
696		1348
697	call_pending ();	1349	call_pending (EV_A);
698	}
699	while (!ev_loop_done);
700		1350
701	if (ev_loop_done != 2)	1351	if (expect_false (loop_done))
		1352	break;
		1353	}
		1354
		1355	if (loop_done == EVUNLOOP_ONE)
		1356	loop_done = EVUNLOOP_CANCEL;
		1357	}
		1358
		1359	void
		1360	ev_unloop (EV_P_ int how)
		1361	{
702	ev_loop_done = 0;	1362	loop_done = how;
703	}	1363	}
704		1364
705	/*****************************************************************************/	1365	/*****************************************************************************/
706		1366
707	static void	1367	void inline_size
708	wlist_add (WL *head, WL elem)	1368	wlist_add (WL *head, WL elem)
709	{	1369	{
710	elem->next = *head;	1370	elem->next = *head;
711	*head = elem;	1371	*head = elem;
712	}	1372	}
713		1373
714	static void	1374	void inline_size
715	wlist_del (WL *head, WL elem)	1375	wlist_del (WL *head, WL elem)
716	{	1376	{
717	while (*head)	1377	while (*head)
718	{	1378	{
719	if (*head == elem)	1379	if (*head == elem)
…		…
724		1384
725	head = &(*head)->next;	1385	head = &(*head)->next;
726	}	1386	}
727	}	1387	}
728		1388
729	static void	1389	void inline_speed
730	ev_clear (W w)	1390	ev_clear_pending (EV_P_ W w)
731	{	1391	{
732	if (w->pending)	1392	if (w->pending)
733	{	1393	{
734	pendings [w->pending - 1].w = 0;	1394	pendings [ABSPRI (w)][w->pending - 1].w = 0;
735	w->pending = 0;	1395	w->pending = 0;
736	}	1396	}
737	}	1397	}
738		1398
739	static void	1399	void inline_speed
740	ev_start (W w, int active)	1400	ev_start (EV_P_ W w, int active)
741	{	1401	{
		1402	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1403	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1404
742	w->active = active;	1405	w->active = active;
		1406	ev_ref (EV_A);
743	}	1407	}
744		1408
745	static void	1409	void inline_size
746	ev_stop (W w)	1410	ev_stop (EV_P_ W w)
747	{	1411	{
		1412	ev_unref (EV_A);
748	w->active = 0;	1413	w->active = 0;
749	}	1414	}
750		1415
751	/*****************************************************************************/	1416	/*****************************************************************************/
752		1417
753	void	1418	void
754	ev_io_start (struct ev_io *w)	1419	ev_io_start (EV_P_ ev_io *w)
755	{	1420	{
756	if (ev_is_active (w))
757	return;
758
759	int fd = w->fd;	1421	int fd = w->fd;
760		1422
		1423	if (expect_false (ev_is_active (w)))
		1424	return;
		1425
		1426	assert (("ev_io_start called with negative fd", fd >= 0));
		1427
761	ev_start ((W)w, 1);	1428	ev_start (EV_A_ (W)w, 1);
762	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1429	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
763	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1430	wlist_add ((WL *)&anfds[fd].head, (WL)w);
764		1431
765	fd_change (fd);	1432	fd_change (EV_A_ fd);
766	}	1433	}
767		1434
768	void	1435	void
769	ev_io_stop (struct ev_io *w)	1436	ev_io_stop (EV_P_ ev_io *w)
770	{	1437	{
771	ev_clear ((W)w);	1438	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1439	if (expect_false (!ev_is_active (w)))
773	return;	1440	return;
		1441
		1442	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
774		1443
775	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1444	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
776	ev_stop ((W)w);	1445	ev_stop (EV_A_ (W)w);
777		1446
778	fd_change (w->fd);	1447	fd_change (EV_A_ w->fd);
779	}	1448	}
780		1449
781	void	1450	void
782	ev_timer_start (struct ev_timer *w)	1451	ev_timer_start (EV_P_ ev_timer *w)
783	{	1452	{
784	if (ev_is_active (w))	1453	if (expect_false (ev_is_active (w)))
785	return;	1454	return;
786		1455
787	w->at += now;	1456	((WT)w)->at += mn_now;
788		1457
789	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1458	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
790		1459
791	ev_start ((W)w, ++timercnt);	1460	ev_start (EV_A_ (W)w, ++timercnt);
792	array_needsize (timers, timermax, timercnt, );	1461	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
793	timers [timercnt - 1] = w;	1462	timers [timercnt - 1] = w;
794	upheap ((WT *)timers, timercnt - 1);	1463	upheap ((WT *)timers, timercnt - 1);
795	}
796		1464
		1465	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1466	}
		1467
797	void	1468	void
798	ev_timer_stop (struct ev_timer *w)	1469	ev_timer_stop (EV_P_ ev_timer *w)
799	{	1470	{
800	ev_clear ((W)w);	1471	ev_clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1472	if (expect_false (!ev_is_active (w)))
802	return;	1473	return;
803		1474
		1475	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1476
804	if (w->active < timercnt--)	1477	if (expect_true (((W)w)->active < timercnt--))
805	{	1478	{
806	timers [w->active - 1] = timers [timercnt];	1479	timers [((W)w)->active - 1] = timers [timercnt];
807	downheap ((WT *)timers, timercnt, w->active - 1);	1480	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
808	}	1481	}
809		1482
810	w->at = w->repeat;	1483	((WT)w)->at -= mn_now;
811		1484
812	ev_stop ((W)w);	1485	ev_stop (EV_A_ (W)w);
813	}	1486	}
814		1487
815	void	1488	void
816	ev_timer_again (struct ev_timer *w)	1489	ev_timer_again (EV_P_ ev_timer *w)
817	{	1490	{
818	if (ev_is_active (w))	1491	if (ev_is_active (w))
819	{	1492	{
820	if (w->repeat)	1493	if (w->repeat)
821	{	1494	{
822	w->at = now + w->repeat;	1495	((WT)w)->at = mn_now + w->repeat;
823	downheap ((WT *)timers, timercnt, w->active - 1);	1496	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
824	}	1497	}
825	else	1498	else
826	ev_timer_stop (w);	1499	ev_timer_stop (EV_A_ w);
827	}	1500	}
828	else if (w->repeat)	1501	else if (w->repeat)
		1502	{
		1503	w->at = w->repeat;
829	ev_timer_start (w);	1504	ev_timer_start (EV_A_ w);
		1505	}
830	}	1506	}
831		1507
		1508	#if EV_PERIODIC_ENABLE
832	void	1509	void
833	ev_periodic_start (struct ev_periodic *w)	1510	ev_periodic_start (EV_P_ ev_periodic *w)
834	{	1511	{
835	if (ev_is_active (w))	1512	if (expect_false (ev_is_active (w)))
836	return;	1513	return;
837		1514
838	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1515	if (w->reschedule_cb)
839		1516	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1517	else if (w->interval)
		1518	{
		1519	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
840	/* this formula differs from the one in periodic_reify because we do not always round up */	1520	/* this formula differs from the one in periodic_reify because we do not always round up */
841	if (w->interval)
842	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1521	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1522	}
843		1523
844	ev_start ((W)w, ++periodiccnt);	1524	ev_start (EV_A_ (W)w, ++periodiccnt);
845	array_needsize (periodics, periodicmax, periodiccnt, );	1525	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
846	periodics [periodiccnt - 1] = w;	1526	periodics [periodiccnt - 1] = w;
847	upheap ((WT *)periodics, periodiccnt - 1);	1527	upheap ((WT *)periodics, periodiccnt - 1);
848	}
849		1528
		1529	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1530	}
		1531
850	void	1532	void
851	ev_periodic_stop (struct ev_periodic *w)	1533	ev_periodic_stop (EV_P_ ev_periodic *w)
852	{	1534	{
853	ev_clear ((W)w);	1535	ev_clear_pending (EV_A_ (W)w);
854	if (!ev_is_active (w))	1536	if (expect_false (!ev_is_active (w)))
855	return;	1537	return;
856		1538
		1539	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1540
857	if (w->active < periodiccnt--)	1541	if (expect_true (((W)w)->active < periodiccnt--))
858	{	1542	{
859	periodics [w->active - 1] = periodics [periodiccnt];	1543	periodics [((W)w)->active - 1] = periodics [periodiccnt];
860	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1544	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
861	}	1545	}
862		1546
863	ev_stop ((W)w);	1547	ev_stop (EV_A_ (W)w);
864	}	1548	}
865		1549
866	void	1550	void
		1551	ev_periodic_again (EV_P_ ev_periodic *w)
		1552	{
		1553	/* TODO: use adjustheap and recalculation */
		1554	ev_periodic_stop (EV_A_ w);
		1555	ev_periodic_start (EV_A_ w);
		1556	}
		1557	#endif
		1558
		1559	void
		1560	ev_idle_start (EV_P_ ev_idle *w)
		1561	{
		1562	if (expect_false (ev_is_active (w)))
		1563	return;
		1564
		1565	ev_start (EV_A_ (W)w, ++idlecnt);
		1566	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1567	idles [idlecnt - 1] = w;
		1568	}
		1569
		1570	void
		1571	ev_idle_stop (EV_P_ ev_idle *w)
		1572	{
		1573	ev_clear_pending (EV_A_ (W)w);
		1574	if (expect_false (!ev_is_active (w)))
		1575	return;
		1576
		1577	{
		1578	int active = ((W)w)->active;
		1579	idles [active - 1] = idles [--idlecnt];
		1580	((W)idles [active - 1])->active = active;
		1581	}
		1582
		1583	ev_stop (EV_A_ (W)w);
		1584	}
		1585
		1586	void
		1587	ev_prepare_start (EV_P_ ev_prepare *w)
		1588	{
		1589	if (expect_false (ev_is_active (w)))
		1590	return;
		1591
		1592	ev_start (EV_A_ (W)w, ++preparecnt);
		1593	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1594	prepares [preparecnt - 1] = w;
		1595	}
		1596
		1597	void
		1598	ev_prepare_stop (EV_P_ ev_prepare *w)
		1599	{
		1600	ev_clear_pending (EV_A_ (W)w);
		1601	if (expect_false (!ev_is_active (w)))
		1602	return;
		1603
		1604	{
		1605	int active = ((W)w)->active;
		1606	prepares [active - 1] = prepares [--preparecnt];
		1607	((W)prepares [active - 1])->active = active;
		1608	}
		1609
		1610	ev_stop (EV_A_ (W)w);
		1611	}
		1612
		1613	void
		1614	ev_check_start (EV_P_ ev_check *w)
		1615	{
		1616	if (expect_false (ev_is_active (w)))
		1617	return;
		1618
		1619	ev_start (EV_A_ (W)w, ++checkcnt);
		1620	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1621	checks [checkcnt - 1] = w;
		1622	}
		1623
		1624	void
		1625	ev_check_stop (EV_P_ ev_check *w)
		1626	{
		1627	ev_clear_pending (EV_A_ (W)w);
		1628	if (expect_false (!ev_is_active (w)))
		1629	return;
		1630
		1631	{
		1632	int active = ((W)w)->active;
		1633	checks [active - 1] = checks [--checkcnt];
		1634	((W)checks [active - 1])->active = active;
		1635	}
		1636
		1637	ev_stop (EV_A_ (W)w);
		1638	}
		1639
		1640	#ifndef SA_RESTART
		1641	# define SA_RESTART 0
		1642	#endif
		1643
		1644	void
867	ev_signal_start (struct ev_signal *w)	1645	ev_signal_start (EV_P_ ev_signal *w)
868	{	1646	{
		1647	#if EV_MULTIPLICITY
		1648	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1649	#endif
869	if (ev_is_active (w))	1650	if (expect_false (ev_is_active (w)))
870	return;	1651	return;
871		1652
		1653	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1654
872	ev_start ((W)w, 1);	1655	ev_start (EV_A_ (W)w, 1);
873	array_needsize (signals, signalmax, w->signum, signals_init);	1656	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
874	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1657	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
875		1658
876	if (!w->next)	1659	if (!((WL)w)->next)
877	{	1660	{
		1661	#if _WIN32
		1662	signal (w->signum, sighandler);
		1663	#else
878	struct sigaction sa;	1664	struct sigaction sa;
879	sa.sa_handler = sighandler;	1665	sa.sa_handler = sighandler;
880	sigfillset (&sa.sa_mask);	1666	sigfillset (&sa.sa_mask);
881	sa.sa_flags = 0;	1667	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
882	sigaction (w->signum, &sa, 0);	1668	sigaction (w->signum, &sa, 0);
		1669	#endif
883	}	1670	}
884	}	1671	}
885		1672
886	void	1673	void
887	ev_signal_stop (struct ev_signal *w)	1674	ev_signal_stop (EV_P_ ev_signal *w)
888	{	1675	{
889	ev_clear ((W)w);	1676	ev_clear_pending (EV_A_ (W)w);
890	if (!ev_is_active (w))	1677	if (expect_false (!ev_is_active (w)))
891	return;	1678	return;
892		1679
893	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1680	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
894	ev_stop ((W)w);	1681	ev_stop (EV_A_ (W)w);
895		1682
896	if (!signals [w->signum - 1].head)	1683	if (!signals [w->signum - 1].head)
897	signal (w->signum, SIG_DFL);	1684	signal (w->signum, SIG_DFL);
898	}	1685	}
899		1686
900	void	1687	void
901	ev_idle_start (struct ev_idle *w)
902	{
903	if (ev_is_active (w))
904	return;
905
906	ev_start ((W)w, ++idlecnt);
907	array_needsize (idles, idlemax, idlecnt, );
908	idles [idlecnt - 1] = w;
909	}
910
911	void
912	ev_idle_stop (struct ev_idle *w)
913	{
914	ev_clear ((W)w);
915	if (ev_is_active (w))
916	return;
917
918	idles [w->active - 1] = idles [--idlecnt];
919	ev_stop ((W)w);
920	}
921
922	void
923	ev_prepare_start (struct ev_prepare *w)
924	{
925	if (ev_is_active (w))
926	return;
927
928	ev_start ((W)w, ++preparecnt);
929	array_needsize (prepares, preparemax, preparecnt, );
930	prepares [preparecnt - 1] = w;
931	}
932
933	void
934	ev_prepare_stop (struct ev_prepare *w)
935	{
936	ev_clear ((W)w);
937	if (ev_is_active (w))
938	return;
939
940	prepares [w->active - 1] = prepares [--preparecnt];
941	ev_stop ((W)w);
942	}
943
944	void
945	ev_check_start (struct ev_check *w)
946	{
947	if (ev_is_active (w))
948	return;
949
950	ev_start ((W)w, ++checkcnt);
951	array_needsize (checks, checkmax, checkcnt, );
952	checks [checkcnt - 1] = w;
953	}
954
955	void
956	ev_check_stop (struct ev_check *w)
957	{
958	ev_clear ((W)w);
959	if (ev_is_active (w))
960	return;
961
962	checks [w->active - 1] = checks [--checkcnt];
963	ev_stop ((W)w);
964	}
965
966	void
967	ev_child_start (struct ev_child *w)	1688	ev_child_start (EV_P_ ev_child *w)
968	{	1689	{
		1690	#if EV_MULTIPLICITY
		1691	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1692	#endif
969	if (ev_is_active (w))	1693	if (expect_false (ev_is_active (w)))
970	return;	1694	return;
971		1695
972	ev_start ((W)w, 1);	1696	ev_start (EV_A_ (W)w, 1);
973	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1697	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
974	}	1698	}
975		1699
976	void	1700	void
977	ev_child_stop (struct ev_child *w)	1701	ev_child_stop (EV_P_ ev_child *w)
978	{	1702	{
979	ev_clear ((W)w);	1703	ev_clear_pending (EV_A_ (W)w);
980	if (ev_is_active (w))	1704	if (expect_false (!ev_is_active (w)))
981	return;	1705	return;
982		1706
983	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1707	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
984	ev_stop ((W)w);	1708	ev_stop (EV_A_ (W)w);
985	}	1709	}
		1710
		1711	#if EV_EMBED_ENABLE
		1712	void noinline
		1713	ev_embed_sweep (EV_P_ ev_embed *w)
		1714	{
		1715	ev_loop (w->loop, EVLOOP_NONBLOCK);
		1716	}
		1717
		1718	static void
		1719	embed_cb (EV_P_ ev_io *io, int revents)
		1720	{
		1721	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
		1722
		1723	if (ev_cb (w))
		1724	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		1725	else
		1726	ev_embed_sweep (loop, w);
		1727	}
		1728
		1729	void
		1730	ev_embed_start (EV_P_ ev_embed *w)
		1731	{
		1732	if (expect_false (ev_is_active (w)))
		1733	return;
		1734
		1735	{
		1736	struct ev_loop *loop = w->loop;
		1737	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		1738	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		1739	}
		1740
		1741	ev_set_priority (&w->io, ev_priority (w));
		1742	ev_io_start (EV_A_ &w->io);
		1743
		1744	ev_start (EV_A_ (W)w, 1);
		1745	}
		1746
		1747	void
		1748	ev_embed_stop (EV_P_ ev_embed *w)
		1749	{
		1750	ev_clear_pending (EV_A_ (W)w);
		1751	if (expect_false (!ev_is_active (w)))
		1752	return;
		1753
		1754	ev_io_stop (EV_A_ &w->io);
		1755
		1756	ev_stop (EV_A_ (W)w);
		1757	}
		1758	#endif
		1759
		1760	#if EV_STAT_ENABLE
		1761
		1762	# ifdef _WIN32
		1763	# define lstat(a,b) stat(a,b)
		1764	# endif
		1765
		1766	void
		1767	ev_stat_stat (EV_P_ ev_stat *w)
		1768	{
		1769	if (lstat (w->path, &w->attr) < 0)
		1770	w->attr.st_nlink = 0;
		1771	else if (!w->attr.st_nlink)
		1772	w->attr.st_nlink = 1;
		1773	}
		1774
		1775	static void
		1776	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1777	{
		1778	ev_stat w = (ev_stat )(((char *)w_) - offsetof (ev_stat, timer));
		1779
		1780	/* we copy this here each the time so that */
		1781	/* prev has the old value when the callback gets invoked */
		1782	w->prev = w->attr;
		1783	ev_stat_stat (EV_A_ w);
		1784
		1785	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
		1786	ev_feed_event (EV_A_ w, EV_STAT);
		1787	}
		1788
		1789	void
		1790	ev_stat_start (EV_P_ ev_stat *w)
		1791	{
		1792	if (expect_false (ev_is_active (w)))
		1793	return;
		1794
		1795	/* since we use memcmp, we need to clear any padding data etc. */
		1796	memset (&w->prev, 0, sizeof (ev_statdata));
		1797	memset (&w->attr, 0, sizeof (ev_statdata));
		1798
		1799	ev_stat_stat (EV_A_ w);
		1800
		1801	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		1802	ev_set_priority (&w->timer, ev_priority (w));
		1803	ev_timer_start (EV_A_ &w->timer);
		1804
		1805	ev_start (EV_A_ (W)w, 1);
		1806	}
		1807
		1808	void
		1809	ev_stat_stop (EV_P_ ev_stat *w)
		1810	{
		1811	ev_clear_pending (EV_A_ (W)w);
		1812	if (expect_false (!ev_is_active (w)))
		1813	return;
		1814
		1815	ev_timer_stop (EV_A_ &w->timer);
		1816
		1817	ev_stop (EV_A_ (W)w);
		1818	}
		1819	#endif
986		1820
987	/*****************************************************************************/	1821	/*****************************************************************************/
988		1822
989	struct ev_once	1823	struct ev_once
990	{	1824	{
991	struct ev_io io;	1825	ev_io io;
992	struct ev_timer to;	1826	ev_timer to;
993	void (cb)(int revents, void arg);	1827	void (cb)(int revents, void arg);
994	void *arg;	1828	void *arg;
995	};	1829	};
996		1830
997	static void	1831	static void
998	once_cb (struct ev_once *once, int revents)	1832	once_cb (EV_P_ struct ev_once *once, int revents)
999	{	1833	{
1000	void (cb)(int revents, void arg) = once->cb;	1834	void (cb)(int revents, void arg) = once->cb;
1001	void *arg = once->arg;	1835	void *arg = once->arg;
1002		1836
1003	ev_io_stop (&once->io);	1837	ev_io_stop (EV_A_ &once->io);
1004	ev_timer_stop (&once->to);	1838	ev_timer_stop (EV_A_ &once->to);
1005	free (once);	1839	ev_free (once);
1006		1840
1007	cb (revents, arg);	1841	cb (revents, arg);
1008	}	1842	}
1009		1843
1010	static void	1844	static void
1011	once_cb_io (struct ev_io *w, int revents)	1845	once_cb_io (EV_P_ ev_io *w, int revents)
1012	{	1846	{
1013	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1847	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1014	}	1848	}
1015		1849
1016	static void	1850	static void
1017	once_cb_to (struct ev_timer *w, int revents)	1851	once_cb_to (EV_P_ ev_timer *w, int revents)
1018	{	1852	{
1019	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1853	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1020	}	1854	}
1021		1855
1022	void	1856	void
1023	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1857	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1024	{	1858	{
1025	struct ev_once *once = malloc (sizeof (struct ev_once));	1859	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
1026		1860
1027	if (!once)	1861	if (expect_false (!once))
		1862	{
1028	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1863	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1029	else	1864	return;
1030	{	1865	}
		1866
1031	once->cb = cb;	1867	once->cb = cb;
1032	once->arg = arg;	1868	once->arg = arg;
1033		1869
1034	ev_watcher_init (&once->io, once_cb_io);	1870	ev_init (&once->io, once_cb_io);
1035	if (fd >= 0)	1871	if (fd >= 0)
1036	{	1872	{
1037	ev_io_set (&once->io, fd, events);	1873	ev_io_set (&once->io, fd, events);
1038	ev_io_start (&once->io);	1874	ev_io_start (EV_A_ &once->io);
1039	}	1875	}
1040		1876
1041	ev_watcher_init (&once->to, once_cb_to);	1877	ev_init (&once->to, once_cb_to);
1042	if (timeout >= 0.)	1878	if (timeout >= 0.)
1043	{	1879	{
1044	ev_timer_set (&once->to, timeout, 0.);	1880	ev_timer_set (&once->to, timeout, 0.);
1045	ev_timer_start (&once->to);	1881	ev_timer_start (EV_A_ &once->to);
1046	}
1047	}
1048	}
1049
1050	/*****************************************************************************/
1051
1052	#if 0
1053
1054	struct ev_io wio;
1055
1056	static void
1057	sin_cb (struct ev_io *w, int revents)
1058	{
1059	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1060	}
1061
1062	static void
1063	ocb (struct ev_timer *w, int revents)
1064	{
1065	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1066	ev_timer_stop (w);
1067	ev_timer_start (w);
1068	}
1069
1070	static void
1071	scb (struct ev_signal *w, int revents)
1072	{
1073	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1074	ev_io_stop (&wio);
1075	ev_io_start (&wio);
1076	}
1077
1078	static void
1079	gcb (struct ev_signal *w, int revents)
1080	{
1081	fprintf (stderr, "generic %x\n", revents);
1082
1083	}
1084
1085	int main (void)
1086	{
1087	ev_init (0);
1088
1089	ev_io_init (&wio, sin_cb, 0, EV_READ);
1090	ev_io_start (&wio);
1091
1092	struct ev_timer t[10000];
1093
1094	#if 0
1095	int i;
1096	for (i = 0; i < 10000; ++i)
1097	{	1882	}
1098	struct ev_timer *w = t + i;
1099	ev_watcher_init (w, ocb, i);
1100	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1101	ev_timer_start (w);
1102	if (drand48 () < 0.5)
1103	ev_timer_stop (w);
1104	}
1105	#endif
1106
1107	struct ev_timer t1;
1108	ev_timer_init (&t1, ocb, 5, 10);
1109	ev_timer_start (&t1);
1110
1111	struct ev_signal sig;
1112	ev_signal_init (&sig, scb, SIGQUIT);
1113	ev_signal_start (&sig);
1114
1115	struct ev_check cw;
1116	ev_check_init (&cw, gcb);
1117	ev_check_start (&cw);
1118
1119	struct ev_idle iw;
1120	ev_idle_init (&iw, gcb);
1121	ev_idle_start (&iw);
1122
1123	ev_loop (0);
1124
1125	return 0;
1126	}	1883	}
1127		1884
		1885	#ifdef __cplusplus
		1886	}
1128	#endif	1887	#endif
1129		1888
1130
1131
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Comparing libev/ev.c (file contents): Revision 1.29 by root, Thu Nov 1 08:10:03 2007 UTC vs. Revision 1.141 by root, Mon Nov 26 20:33:58 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.29 by root, Thu Nov 1 08:10:03 2007 UTC vs.
Revision 1.141 by root, Mon Nov 26 20:33:58 2007 UTC