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Comparing libev/ev.c (file contents):
Revision 1.22 by root, Wed Oct 31 19:07:43 2007 UTC vs.
Revision 1.150 by root, Tue Nov 27 19:41:52 2007 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
…		…
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
		151	#endif
		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	#ifndef EV_PID_HASHSIZE
		162	# if EV_MINIMAL
		163	# define EV_PID_HASHSIZE 1
		164	# else
		165	# define EV_PID_HASHSIZE 16
58	#endif	166	# endif
		167	#endif
59		168
		169	/**/
		170
		171	#ifndef CLOCK_MONOTONIC
		172	# undef EV_USE_MONOTONIC
		173	# define EV_USE_MONOTONIC 0
		174	#endif
		175
60	#ifndef HAVE_REALTIME	176	#ifndef CLOCK_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	177	# undef EV_USE_REALTIME
		178	# define EV_USE_REALTIME 0
62	#endif	179	#endif
		180
		181	#if EV_SELECT_IS_WINSOCKET
		182	# include <winsock.h>
		183	#endif
		184
		185	/**/
63		186
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	187	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	188	#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 */	189	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
67		190
		191	#ifdef EV_H
		192	# include EV_H
		193	#else
68	#include "ev.h"	194	# include "ev.h"
		195	#endif
69		196
		197	#if __GNUC__ >= 3
		198	# define expect(expr,value) __builtin_expect ((expr),(value))
		199	# define inline_size static inline /* inline for codesize */
		200	# if EV_MINIMAL
		201	# define noinline __attribute__ ((noinline))
		202	# define inline_speed static noinline
		203	# else
		204	# define noinline
		205	# define inline_speed static inline
		206	# endif
		207	#else
		208	# define expect(expr,value) (expr)
		209	# define inline_speed static
		210	# define inline_size static
		211	# define noinline
		212	#endif
		213
		214	#define expect_false(expr) expect ((expr) != 0, 0)
		215	#define expect_true(expr) expect ((expr) != 0, 1)
		216
		217	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		218	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		219
		220	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		221	#define EMPTY2(a,b) /* used to suppress some warnings */
		222
70	typedef struct ev_watcher *W;	223	typedef ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	224	typedef ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	225	typedef ev_watcher_time *WT;
73		226
74	static ev_tstamp now, diff; /* monotonic clock */	227	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		228
		229	#ifdef _WIN32
		230	# include "ev_win32.c"
		231	#endif
		232
		233	/*****************************************************************************/
		234
		235	static void (*syserr_cb)(const char *msg);
		236
		237	void
		238	ev_set_syserr_cb (void (*cb)(const char *msg))
		239	{
		240	syserr_cb = cb;
		241	}
		242
		243	static void noinline
		244	syserr (const char *msg)
		245	{
		246	if (!msg)
		247	msg = "(libev) system error";
		248
		249	if (syserr_cb)
		250	syserr_cb (msg);
		251	else
		252	{
		253	perror (msg);
		254	abort ();
		255	}
		256	}
		257
		258	static void *(*alloc)(void *ptr, size_t size) = realloc;
		259
		260	void
		261	ev_set_allocator (void *(*cb)(void *ptr, size_t size))
		262	{
		263	alloc = cb;
		264	}
		265
		266	inline_speed void *
		267	ev_realloc (void *ptr, size_t size)
		268	{
		269	ptr = alloc (ptr, size);
		270
		271	if (!ptr && size)
		272	{
		273	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", (long)size);
		274	abort ();
		275	}
		276
		277	return ptr;
		278	}
		279
		280	#define ev_malloc(size) ev_realloc (0, (size))
		281	#define ev_free(ptr) ev_realloc ((ptr), 0)
		282
		283	/*****************************************************************************/
		284
		285	typedef struct
		286	{
		287	WL head;
		288	unsigned char events;
		289	unsigned char reify;
		290	#if EV_SELECT_IS_WINSOCKET
		291	SOCKET handle;
		292	#endif
		293	} ANFD;
		294
		295	typedef struct
		296	{
		297	W w;
		298	int events;
		299	} ANPENDING;
		300
		301	#if EV_MULTIPLICITY
		302
		303	struct ev_loop
		304	{
		305	ev_tstamp ev_rt_now;
		306	#define ev_rt_now ((loop)->ev_rt_now)
		307	#define VAR(name,decl) decl;
		308	#include "ev_vars.h"
		309	#undef VAR
		310	};
		311	#include "ev_wrap.h"
		312
		313	static struct ev_loop default_loop_struct;
		314	struct ev_loop *ev_default_loop_ptr;
		315
		316	#else
		317
75	ev_tstamp ev_now;	318	ev_tstamp ev_rt_now;
76	int ev_method;	319	#define VAR(name,decl) static decl;
		320	#include "ev_vars.h"
		321	#undef VAR
77		322
78	static int have_monotonic; /* runtime */	323	static int ev_default_loop_ptr;
79		324
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	325	#endif
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		326
84	/*****************************************************************************/	327	/*****************************************************************************/
85		328
86	ev_tstamp	329	ev_tstamp
87	ev_time (void)	330	ev_time (void)
88	{	331	{
89	#if HAVE_REALTIME	332	#if EV_USE_REALTIME
90	struct timespec ts;	333	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	334	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	335	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	336	#else
94	struct timeval tv;	337	struct timeval tv;
95	gettimeofday (&tv, 0);	338	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	339	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	340	#endif
98	}	341	}
99		342
100	static ev_tstamp	343	ev_tstamp inline_size
101	get_clock (void)	344	get_clock (void)
102	{	345	{
103	#if HAVE_MONOTONIC	346	#if EV_USE_MONOTONIC
104	if (have_monotonic)	347	if (expect_true (have_monotonic))
105	{	348	{
106	struct timespec ts;	349	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	350	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	351	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	352	}
110	#endif	353	#endif
111		354
112	return ev_time ();	355	return ev_time ();
113	}	356	}
114		357
		358	#if EV_MULTIPLICITY
		359	ev_tstamp
		360	ev_now (EV_P)
		361	{
		362	return ev_rt_now;
		363	}
		364	#endif
		365
		366	#define array_roundsize(type,n) (((n) | 4) & ~3)
		367
115	#define array_needsize(base,cur,cnt,init) \	368	#define array_needsize(type,base,cur,cnt,init) \
116	if ((cnt) > cur) \	369	if (expect_false ((cnt) > cur)) \
117	{ \	370	{ \
118	int newcnt = cur ? cur << 1 : 16; \	371	int newcnt = cur; \
		372	do \
		373	{ \
		374	newcnt = array_roundsize (type, newcnt << 1); \
		375	} \
		376	while ((cnt) > newcnt); \
		377	\
119	base = realloc (base, sizeof (*base) * (newcnt)); \	378	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
120	init (base + cur, newcnt - cur); \	379	init (base + cur, newcnt - cur); \
121	cur = newcnt; \	380	cur = newcnt; \
122	}	381	}
		382
		383	#define array_slim(type,stem) \
		384	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		385	{ \
		386	stem ## max = array_roundsize (stem ## cnt >> 1); \
		387	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		388	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		389	}
		390
		391	#define array_free(stem, idx) \
		392	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
123		393
124	/*****************************************************************************/	394	/*****************************************************************************/
125		395
		396	void noinline
		397	ev_feed_event (EV_P_ void *w, int revents)
		398	{
		399	W w_ = (W)w;
		400
		401	if (expect_false (w_->pending))
		402	{
		403	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		404	return;
		405	}
		406
		407	w_->pending = ++pendingcnt [ABSPRI (w_)];
		408	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		409	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		410	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		411	}
		412
		413	void inline_size
		414	queue_events (EV_P_ W *events, int eventcnt, int type)
		415	{
		416	int i;
		417
		418	for (i = 0; i < eventcnt; ++i)
		419	ev_feed_event (EV_A_ events [i], type);
		420	}
		421
		422	/*****************************************************************************/
		423
		424	void inline_size
		425	anfds_init (ANFD *base, int count)
		426	{
		427	while (count--)
		428	{
		429	base->head = 0;
		430	base->events = EV_NONE;
		431	base->reify = 0;
		432
		433	++base;
		434	}
		435	}
		436
		437	void inline_speed
		438	fd_event (EV_P_ int fd, int revents)
		439	{
		440	ANFD *anfd = anfds + fd;
		441	ev_io *w;
		442
		443	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		444	{
		445	int ev = w->events & revents;
		446
		447	if (ev)
		448	ev_feed_event (EV_A_ (W)w, ev);
		449	}
		450	}
		451
		452	void
		453	ev_feed_fd_event (EV_P_ int fd, int revents)
		454	{
		455	fd_event (EV_A_ fd, revents);
		456	}
		457
		458	void inline_size
		459	fd_reify (EV_P)
		460	{
		461	int i;
		462
		463	for (i = 0; i < fdchangecnt; ++i)
		464	{
		465	int fd = fdchanges [i];
		466	ANFD *anfd = anfds + fd;
		467	ev_io *w;
		468
		469	int events = 0;
		470
		471	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		472	events |= w->events;
		473
		474	#if EV_SELECT_IS_WINSOCKET
		475	if (events)
		476	{
		477	unsigned long argp;
		478	anfd->handle = _get_osfhandle (fd);
		479	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		480	}
		481	#endif
		482
		483	anfd->reify = 0;
		484
		485	backend_modify (EV_A_ fd, anfd->events, events);
		486	anfd->events = events;
		487	}
		488
		489	fdchangecnt = 0;
		490	}
		491
		492	void inline_size
		493	fd_change (EV_P_ int fd)
		494	{
		495	if (expect_false (anfds [fd].reify))
		496	return;
		497
		498	anfds [fd].reify = 1;
		499
		500	++fdchangecnt;
		501	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		502	fdchanges [fdchangecnt - 1] = fd;
		503	}
		504
		505	void inline_speed
		506	fd_kill (EV_P_ int fd)
		507	{
		508	ev_io *w;
		509
		510	while ((w = (ev_io *)anfds [fd].head))
		511	{
		512	ev_io_stop (EV_A_ w);
		513	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		514	}
		515	}
		516
		517	int inline_size
		518	fd_valid (int fd)
		519	{
		520	#ifdef _WIN32
		521	return _get_osfhandle (fd) != -1;
		522	#else
		523	return fcntl (fd, F_GETFD) != -1;
		524	#endif
		525	}
		526
		527	/* called on EBADF to verify fds */
		528	static void noinline
		529	fd_ebadf (EV_P)
		530	{
		531	int fd;
		532
		533	for (fd = 0; fd < anfdmax; ++fd)
		534	if (anfds [fd].events)
		535	if (!fd_valid (fd) == -1 && errno == EBADF)
		536	fd_kill (EV_A_ fd);
		537	}
		538
		539	/* called on ENOMEM in select/poll to kill some fds and retry */
		540	static void noinline
		541	fd_enomem (EV_P)
		542	{
		543	int fd;
		544
		545	for (fd = anfdmax; fd--; )
		546	if (anfds [fd].events)
		547	{
		548	fd_kill (EV_A_ fd);
		549	return;
		550	}
		551	}
		552
		553	/* usually called after fork if backend needs to re-arm all fds from scratch */
		554	static void noinline
		555	fd_rearm_all (EV_P)
		556	{
		557	int fd;
		558
		559	/* this should be highly optimised to not do anything but set a flag */
		560	for (fd = 0; fd < anfdmax; ++fd)
		561	if (anfds [fd].events)
		562	{
		563	anfds [fd].events = 0;
		564	fd_change (EV_A_ fd);
		565	}
		566	}
		567
		568	/*****************************************************************************/
		569
		570	void inline_speed
		571	upheap (WT *heap, int k)
		572	{
		573	WT w = heap [k];
		574
		575	while (k && heap [k >> 1]->at > w->at)
		576	{
		577	heap [k] = heap [k >> 1];
		578	((W)heap [k])->active = k + 1;
		579	k >>= 1;
		580	}
		581
		582	heap [k] = w;
		583	((W)heap [k])->active = k + 1;
		584
		585	}
		586
		587	void inline_speed
		588	downheap (WT *heap, int N, int k)
		589	{
		590	WT w = heap [k];
		591
		592	while (k < (N >> 1))
		593	{
		594	int j = k << 1;
		595
		596	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		597	++j;
		598
		599	if (w->at <= heap [j]->at)
		600	break;
		601
		602	heap [k] = heap [j];
		603	((W)heap [k])->active = k + 1;
		604	k = j;
		605	}
		606
		607	heap [k] = w;
		608	((W)heap [k])->active = k + 1;
		609	}
		610
		611	void inline_size
		612	adjustheap (WT *heap, int N, int k)
		613	{
		614	upheap (heap, k);
		615	downheap (heap, N, k);
		616	}
		617
		618	/*****************************************************************************/
		619
126	typedef struct	620	typedef struct
127	{	621	{
128	struct ev_io *head;	622	WL head;
129	unsigned char wev, rev; /* want, received event set */
130	} ANFD;
131
132	static ANFD *anfds;
133	static int anfdmax;
134
135	static int *fdchanges;
136	static int fdchangemax, fdchangecnt;
137
138	static void
139	anfds_init (ANFD *base, int count)
140	{
141	while (count--)
142	{
143	base->head = 0;
144	base->wev = base->rev = EV_NONE;
145	++base;
146	}
147	}
148
149	typedef struct
150	{
151	W w;
152	int events;
153	} ANPENDING;
154
155	static ANPENDING *pendings;
156	static int pendingmax, pendingcnt;
157
158	static void
159	event (W w, int events)
160	{
161	if (w->active)
162	{
163	w->pending = ++pendingcnt;
164	array_needsize (pendings, pendingmax, pendingcnt, );
165	pendings [pendingcnt - 1].w = w;
166	pendings [pendingcnt - 1].events = events;
167	}
168	}
169
170	static void
171	fd_event (int fd, int events)
172	{
173	ANFD *anfd = anfds + fd;
174	struct ev_io *w;
175
176	for (w = anfd->head; w; w = w->next)
177	{
178	int ev = w->events & events;
179
180	if (ev)
181	event ((W)w, ev);
182	}
183	}
184
185	static void
186	queue_events (W *events, int eventcnt, int type)
187	{
188	int i;
189
190	for (i = 0; i < eventcnt; ++i)
191	event (events [i], type);
192	}
193
194	/* called on EBADF to verify fds */
195	static void
196	fd_recheck ()
197	{
198	int fd;
199
200	for (fd = 0; fd < anfdmax; ++fd)
201	if (anfds [fd].wev)
202	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
203	while (anfds [fd].head)
204	evio_stop (anfds [fd].head);
205	}
206
207	/*****************************************************************************/
208
209	static struct ev_timer **timers;
210	static int timermax, timercnt;
211
212	static struct ev_periodic **periodics;
213	static int periodicmax, periodiccnt;
214
215	static void
216	upheap (WT *timers, int k)
217	{
218	WT w = timers [k];
219
220	while (k && timers [k >> 1]->at > w->at)
221	{
222	timers [k] = timers [k >> 1];
223	timers [k]->active = k + 1;
224	k >>= 1;
225	}
226
227	timers [k] = w;
228	timers [k]->active = k + 1;
229
230	}
231
232	static void
233	downheap (WT *timers, int N, int k)
234	{
235	WT w = timers [k];
236
237	while (k < (N >> 1))
238	{
239	int j = k << 1;
240
241	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
242	++j;
243
244	if (w->at <= timers [j]->at)
245	break;
246
247	timers [k] = timers [j];
248	timers [k]->active = k + 1;
249	k = j;
250	}
251
252	timers [k] = w;
253	timers [k]->active = k + 1;
254	}
255
256	/*****************************************************************************/
257
258	typedef struct
259	{
260	struct ev_signal *head;
261	sig_atomic_t gotsig;	623	sig_atomic_t volatile gotsig;
262	} ANSIG;	624	} ANSIG;
263		625
264	static ANSIG *signals;	626	static ANSIG *signals;
265	static int signalmax;	627	static int signalmax;
266		628
267	static int sigpipe [2];	629	static int sigpipe [2];
268	static sig_atomic_t gotsig;	630	static sig_atomic_t volatile gotsig;
269	static struct ev_io sigev;	631	static ev_io sigev;
270		632
271	static void	633	void inline_size
272	signals_init (ANSIG *base, int count)	634	signals_init (ANSIG *base, int count)
273	{	635	{
274	while (count--)	636	while (count--)
275	{	637	{
276	base->head = 0;	638	base->head = 0;
277	base->gotsig = 0;	639	base->gotsig = 0;
		640
278	++base;	641	++base;
279	}	642	}
280	}	643	}
281		644
282	static void	645	static void
283	sighandler (int signum)	646	sighandler (int signum)
284	{	647	{
		648	#if _WIN32
		649	signal (signum, sighandler);
		650	#endif
		651
285	signals [signum - 1].gotsig = 1;	652	signals [signum - 1].gotsig = 1;
286		653
287	if (!gotsig)	654	if (!gotsig)
288	{	655	{
		656	int old_errno = errno;
289	gotsig = 1;	657	gotsig = 1;
290	write (sigpipe [1], &gotsig, 1);	658	write (sigpipe [1], &signum, 1);
		659	errno = old_errno;
291	}	660	}
		661	}
		662
		663	void noinline
		664	ev_feed_signal_event (EV_P_ int signum)
		665	{
		666	WL w;
		667
		668	#if EV_MULTIPLICITY
		669	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		670	#endif
		671
		672	--signum;
		673
		674	if (signum < 0 || signum >= signalmax)
		675	return;
		676
		677	signals [signum].gotsig = 0;
		678
		679	for (w = signals [signum].head; w; w = w->next)
		680	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
292	}	681	}
293		682
294	static void	683	static void
295	sigcb (struct ev_io *iow, int revents)	684	sigcb (EV_P_ ev_io *iow, int revents)
296	{	685	{
297	struct ev_signal *w;
298	int sig;	686	int signum;
299		687
		688	read (sigpipe [0], &revents, 1);
300	gotsig = 0;	689	gotsig = 0;
301	read (sigpipe [0], &revents, 1);
302		690
303	for (sig = signalmax; sig--; )	691	for (signum = signalmax; signum--; )
304	if (signals [sig].gotsig)	692	if (signals [signum].gotsig)
		693	ev_feed_signal_event (EV_A_ signum + 1);
		694	}
		695
		696	void inline_size
		697	fd_intern (int fd)
		698	{
		699	#ifdef _WIN32
		700	int arg = 1;
		701	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		702	#else
		703	fcntl (fd, F_SETFD, FD_CLOEXEC);
		704	fcntl (fd, F_SETFL, O_NONBLOCK);
		705	#endif
		706	}
		707
		708	static void noinline
		709	siginit (EV_P)
		710	{
		711	fd_intern (sigpipe [0]);
		712	fd_intern (sigpipe [1]);
		713
		714	ev_io_set (&sigev, sigpipe [0], EV_READ);
		715	ev_io_start (EV_A_ &sigev);
		716	ev_unref (EV_A); /* child watcher should not keep loop alive */
		717	}
		718
		719	/*****************************************************************************/
		720
		721	static ev_child *childs [EV_PID_HASHSIZE];
		722
		723	#ifndef _WIN32
		724
		725	static ev_signal childev;
		726
		727	void inline_speed
		728	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		729	{
		730	ev_child *w;
		731
		732	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		733	if (w->pid == pid || !w->pid)
305	{	734	{
306	signals [sig].gotsig = 0;	735	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
307		736	w->rpid = pid;
308	for (w = signals [sig].head; w; w = w->next)	737	w->rstatus = status;
309	event ((W)w, EV_SIGNAL);	738	ev_feed_event (EV_A_ (W)w, EV_CHILD);
310	}	739	}
311	}	740	}
312
313	static void
314	siginit (void)
315	{
316	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
317	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
318
319	/* rather than sort out wether we really need nb, set it */
320	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
321	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
322
323	evio_set (&sigev, sigpipe [0], EV_READ);
324	evio_start (&sigev);
325	}
326
327	/*****************************************************************************/
328
329	static struct ev_idle **idles;
330	static int idlemax, idlecnt;
331
332	static struct ev_prepare **prepares;
333	static int preparemax, preparecnt;
334
335	static struct ev_check **checks;
336	static int checkmax, checkcnt;
337
338	/*****************************************************************************/
339
340	static struct ev_child *childs [PID_HASHSIZE];
341	static struct ev_signal childev;
342		741
343	#ifndef WCONTINUED	742	#ifndef WCONTINUED
344	# define WCONTINUED 0	743	# define WCONTINUED 0
345	#endif	744	#endif
346		745
347	static void	746	static void
348	childcb (struct ev_signal *sw, int revents)	747	childcb (EV_P_ ev_signal *sw, int revents)
349	{	748	{
350	struct ev_child *w;
351	int pid, status;	749	int pid, status;
352		750
		751	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
353	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	752	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
354	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	753	if (!WCONTINUED
355	if (w->pid == pid || w->pid == -1)	754	|| errno != EINVAL
		755	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		756	return;
		757
		758	/* make sure we are called again until all childs have been reaped */
		759	/* we need to do it this way so that the callback gets called before we continue */
		760	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		761
		762	child_reap (EV_A_ sw, pid, pid, status);
		763	if (EV_PID_HASHSIZE > 1)
		764	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		765	}
		766
		767	#endif
		768
		769	/*****************************************************************************/
		770
		771	#if EV_USE_PORT
		772	# include "ev_port.c"
		773	#endif
		774	#if EV_USE_KQUEUE
		775	# include "ev_kqueue.c"
		776	#endif
		777	#if EV_USE_EPOLL
		778	# include "ev_epoll.c"
		779	#endif
		780	#if EV_USE_POLL
		781	# include "ev_poll.c"
		782	#endif
		783	#if EV_USE_SELECT
		784	# include "ev_select.c"
		785	#endif
		786
		787	int
		788	ev_version_major (void)
		789	{
		790	return EV_VERSION_MAJOR;
		791	}
		792
		793	int
		794	ev_version_minor (void)
		795	{
		796	return EV_VERSION_MINOR;
		797	}
		798
		799	/* return true if we are running with elevated privileges and should ignore env variables */
		800	int inline_size
		801	enable_secure (void)
		802	{
		803	#ifdef _WIN32
		804	return 0;
		805	#else
		806	return getuid () != geteuid ()
		807	|| getgid () != getegid ();
		808	#endif
		809	}
		810
		811	unsigned int
		812	ev_supported_backends (void)
		813	{
		814	unsigned int flags = 0;
		815
		816	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		817	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		818	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		819	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		820	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		821
		822	return flags;
		823	}
		824
		825	unsigned int
		826	ev_recommended_backends (void)
		827	{
		828	unsigned int flags = ev_supported_backends ();
		829
		830	#ifndef __NetBSD__
		831	/* kqueue is borked on everything but netbsd apparently */
		832	/* it usually doesn't work correctly on anything but sockets and pipes */
		833	flags &= ~EVBACKEND_KQUEUE;
		834	#endif
		835	#ifdef __APPLE__
		836	// flags &= ~EVBACKEND_KQUEUE; for documentation
		837	flags &= ~EVBACKEND_POLL;
		838	#endif
		839
		840	return flags;
		841	}
		842
		843	unsigned int
		844	ev_embeddable_backends (void)
		845	{
		846	return EVBACKEND_EPOLL
		847	| EVBACKEND_KQUEUE
		848	| EVBACKEND_PORT;
		849	}
		850
		851	unsigned int
		852	ev_backend (EV_P)
		853	{
		854	return backend;
		855	}
		856
		857	static void
		858	loop_init (EV_P_ unsigned int flags)
		859	{
		860	if (!backend)
		861	{
		862	#if EV_USE_MONOTONIC
		863	{
		864	struct timespec ts;
		865	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		866	have_monotonic = 1;
		867	}
		868	#endif
		869
		870	ev_rt_now = ev_time ();
		871	mn_now = get_clock ();
		872	now_floor = mn_now;
		873	rtmn_diff = ev_rt_now - mn_now;
		874
		875	if (!(flags & EVFLAG_NOENV)
		876	&& !enable_secure ()
		877	&& getenv ("LIBEV_FLAGS"))
		878	flags = atoi (getenv ("LIBEV_FLAGS"));
		879
		880	if (!(flags & 0x0000ffffUL))
		881	flags |= ev_recommended_backends ();
		882
		883	backend = 0;
		884	#if EV_USE_PORT
		885	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		886	#endif
		887	#if EV_USE_KQUEUE
		888	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		889	#endif
		890	#if EV_USE_EPOLL
		891	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		892	#endif
		893	#if EV_USE_POLL
		894	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		895	#endif
		896	#if EV_USE_SELECT
		897	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		898	#endif
		899
		900	ev_init (&sigev, sigcb);
		901	ev_set_priority (&sigev, EV_MAXPRI);
		902	}
		903	}
		904
		905	static void
		906	loop_destroy (EV_P)
		907	{
		908	int i;
		909
		910	#if EV_USE_PORT
		911	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		912	#endif
		913	#if EV_USE_KQUEUE
		914	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		915	#endif
		916	#if EV_USE_EPOLL
		917	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		918	#endif
		919	#if EV_USE_POLL
		920	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		921	#endif
		922	#if EV_USE_SELECT
		923	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		924	#endif
		925
		926	for (i = NUMPRI; i--; )
		927	array_free (pending, [i]);
		928
		929	/* have to use the microsoft-never-gets-it-right macro */
		930	array_free (fdchange, EMPTY0);
		931	array_free (timer, EMPTY0);
		932	#if EV_PERIODIC_ENABLE
		933	array_free (periodic, EMPTY0);
		934	#endif
		935	array_free (idle, EMPTY0);
		936	array_free (prepare, EMPTY0);
		937	array_free (check, EMPTY0);
		938
		939	backend = 0;
		940	}
		941
		942	static void
		943	loop_fork (EV_P)
		944	{
		945	#if EV_USE_PORT
		946	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		947	#endif
		948	#if EV_USE_KQUEUE
		949	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		950	#endif
		951	#if EV_USE_EPOLL
		952	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		953	#endif
		954
		955	if (ev_is_active (&sigev))
		956	{
		957	/* default loop */
		958
		959	ev_ref (EV_A);
		960	ev_io_stop (EV_A_ &sigev);
		961	close (sigpipe [0]);
		962	close (sigpipe [1]);
		963
		964	while (pipe (sigpipe))
		965	syserr ("(libev) error creating pipe");
		966
		967	siginit (EV_A);
		968	}
		969
		970	postfork = 0;
		971	}
		972
		973	#if EV_MULTIPLICITY
		974	struct ev_loop *
		975	ev_loop_new (unsigned int flags)
		976	{
		977	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		978
		979	memset (loop, 0, sizeof (struct ev_loop));
		980
		981	loop_init (EV_A_ flags);
		982
		983	if (ev_backend (EV_A))
		984	return loop;
		985
		986	return 0;
		987	}
		988
		989	void
		990	ev_loop_destroy (EV_P)
		991	{
		992	loop_destroy (EV_A);
		993	ev_free (loop);
		994	}
		995
		996	void
		997	ev_loop_fork (EV_P)
		998	{
		999	postfork = 1;
		1000	}
		1001
		1002	#endif
		1003
		1004	#if EV_MULTIPLICITY
		1005	struct ev_loop *
		1006	ev_default_loop_init (unsigned int flags)
		1007	#else
		1008	int
		1009	ev_default_loop (unsigned int flags)
		1010	#endif
		1011	{
		1012	if (sigpipe [0] == sigpipe [1])
		1013	if (pipe (sigpipe))
		1014	return 0;
		1015
		1016	if (!ev_default_loop_ptr)
		1017	{
		1018	#if EV_MULTIPLICITY
		1019	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1020	#else
		1021	ev_default_loop_ptr = 1;
		1022	#endif
		1023
		1024	loop_init (EV_A_ flags);
		1025
		1026	if (ev_backend (EV_A))
356	{	1027	{
357	w->status = status;	1028	siginit (EV_A);
358	event ((W)w, EV_CHILD);	1029
		1030	#ifndef _WIN32
		1031	ev_signal_init (&childev, childcb, SIGCHLD);
		1032	ev_set_priority (&childev, EV_MAXPRI);
		1033	ev_signal_start (EV_A_ &childev);
		1034	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1035	#endif
359	}	1036	}
		1037	else
		1038	ev_default_loop_ptr = 0;
		1039	}
		1040
		1041	return ev_default_loop_ptr;
		1042	}
		1043
		1044	void
		1045	ev_default_destroy (void)
		1046	{
		1047	#if EV_MULTIPLICITY
		1048	struct ev_loop *loop = ev_default_loop_ptr;
		1049	#endif
		1050
		1051	#ifndef _WIN32
		1052	ev_ref (EV_A); /* child watcher */
		1053	ev_signal_stop (EV_A_ &childev);
		1054	#endif
		1055
		1056	ev_ref (EV_A); /* signal watcher */
		1057	ev_io_stop (EV_A_ &sigev);
		1058
		1059	close (sigpipe [0]); sigpipe [0] = 0;
		1060	close (sigpipe [1]); sigpipe [1] = 0;
		1061
		1062	loop_destroy (EV_A);
		1063	}
		1064
		1065	void
		1066	ev_default_fork (void)
		1067	{
		1068	#if EV_MULTIPLICITY
		1069	struct ev_loop *loop = ev_default_loop_ptr;
		1070	#endif
		1071
		1072	if (backend)
		1073	postfork = 1;
360	}	1074	}
361		1075
362	/*****************************************************************************/	1076	/*****************************************************************************/
363		1077
364	#if HAVE_EPOLL	1078	int inline_size
365	# include "ev_epoll.c"	1079	any_pending (EV_P)
366	#endif
367	#if HAVE_SELECT
368	# include "ev_select.c"
369	#endif
370
371	int ev_init (int flags)
372	{	1080	{
373	#if HAVE_MONOTONIC	1081	int pri;
374	{
375	struct timespec ts;
376	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
377	have_monotonic = 1;
378	}
379	#endif
380		1082
381	ev_now = ev_time ();	1083	for (pri = NUMPRI; pri--; )
382	now = get_clock ();	1084	if (pendingcnt [pri])
383	diff = ev_now - now;	1085	return 1;
384		1086
385	if (pipe (sigpipe))
386	return 0;	1087	return 0;
387
388	ev_method = EVMETHOD_NONE;
389	#if HAVE_EPOLL
390	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
391	#endif
392	#if HAVE_SELECT
393	if (ev_method == EVMETHOD_NONE) select_init (flags);
394	#endif
395
396	if (ev_method)
397	{
398	evw_init (&sigev, sigcb);
399	siginit ();
400
401	evsignal_init (&childev, childcb, SIGCHLD);
402	evsignal_start (&childev);
403	}
404
405	return ev_method;
406	}	1088	}
407		1089
408	/*****************************************************************************/	1090	void inline_speed
409		1091	call_pending (EV_P)
410	void ev_prefork (void)
411	{	1092	{
412	/* nop */
413	}
414
415	void ev_postfork_parent (void)
416	{
417	/* nop */
418	}
419
420	void ev_postfork_child (void)
421	{
422	#if HAVE_EPOLL
423	if (ev_method == EVMETHOD_EPOLL)
424	epoll_postfork_child ();
425	#endif
426
427	evio_stop (&sigev);
428	close (sigpipe [0]);
429	close (sigpipe [1]);
430	pipe (sigpipe);
431	siginit ();
432	}
433
434	/*****************************************************************************/
435
436	static void
437	fd_reify (void)
438	{
439	int i;	1093	int pri;
440		1094
441	for (i = 0; i < fdchangecnt; ++i)	1095	for (pri = NUMPRI; pri--; )
		1096	while (pendingcnt [pri])
442	{	1097	{
443	int fd = fdchanges [i];	1098	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
444	ANFD *anfd = anfds + fd;
445	struct ev_io *w;
446		1099
447	int wev = 0;	1100	if (expect_true (p->w))
448
449	for (w = anfd->head; w; w = w->next)
450	wev |= w->events;
451
452	if (anfd->wev != wev)
453	{	1101	{
454	method_modify (fd, anfd->wev, wev);	1102	assert (("non-pending watcher on pending list", p->w->pending));
455	anfd->wev = wev;
456	}
457	}
458		1103
459	fdchangecnt = 0;
460	}
461
462	static void
463	call_pending ()
464	{
465	while (pendingcnt)
466	{
467	ANPENDING *p = pendings + --pendingcnt;
468
469	if (p->w)
470	{
471	p->w->pending = 0;	1104	p->w->pending = 0;
472	p->w->cb (p->w, p->events);	1105	EV_CB_INVOKE (p->w, p->events);
473	}	1106	}
474	}	1107	}
475	}	1108	}
476		1109
477	static void	1110	void inline_size
478	timers_reify ()	1111	timers_reify (EV_P)
479	{	1112	{
480	while (timercnt && timers [0]->at <= now)	1113	while (timercnt && ((WT)timers [0])->at <= mn_now)
481	{	1114	{
482	struct ev_timer *w = timers [0];	1115	ev_timer *w = timers [0];
483		1116
484	event ((W)w, EV_TIMEOUT);	1117	assert (("inactive timer on timer heap detected", ev_is_active (w)));
485		1118
486	/* first reschedule or stop timer */	1119	/* first reschedule or stop timer */
487	if (w->repeat)	1120	if (w->repeat)
488	{	1121	{
		1122	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1123
489	w->at = now + w->repeat;	1124	((WT)w)->at += w->repeat;
490	assert (("timer timeout in the past, negative repeat?", w->at > now));	1125	if (((WT)w)->at < mn_now)
		1126	((WT)w)->at = mn_now;
		1127
491	downheap ((WT *)timers, timercnt, 0);	1128	downheap ((WT *)timers, timercnt, 0);
492	}	1129	}
493	else	1130	else
494	evtimer_stop (w); /* nonrepeating: stop timer */	1131	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
495	}
496	}
497		1132
498	static void	1133	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1134	}
		1135	}
		1136
		1137	#if EV_PERIODIC_ENABLE
		1138	void inline_size
499	periodics_reify ()	1139	periodics_reify (EV_P)
500	{	1140	{
501	while (periodiccnt && periodics [0]->at <= ev_now)	1141	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
502	{	1142	{
503	struct ev_periodic *w = periodics [0];	1143	ev_periodic *w = periodics [0];
		1144
		1145	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
504		1146
505	/* first reschedule or stop timer */	1147	/* first reschedule or stop timer */
506	if (w->interval)	1148	if (w->reschedule_cb)
507	{	1149	{
		1150	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1151	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1152	downheap ((WT *)periodics, periodiccnt, 0);
		1153	}
		1154	else if (w->interval)
		1155	{
508	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1156	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
509	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1157	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
510	downheap ((WT *)periodics, periodiccnt, 0);	1158	downheap ((WT *)periodics, periodiccnt, 0);
511	}	1159	}
512	else	1160	else
513	evperiodic_stop (w); /* nonrepeating: stop timer */	1161	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
514		1162
515	event ((W)w, EV_TIMEOUT);	1163	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
516	}	1164	}
517	}	1165	}
518		1166
519	static void	1167	static void noinline
520	periodics_reschedule (ev_tstamp diff)	1168	periodics_reschedule (EV_P)
521	{	1169	{
522	int i;	1170	int i;
523		1171
524	/* adjust periodics after time jump */	1172	/* adjust periodics after time jump */
525	for (i = 0; i < periodiccnt; ++i)	1173	for (i = 0; i < periodiccnt; ++i)
526	{	1174	{
527	struct ev_periodic *w = periodics [i];	1175	ev_periodic *w = periodics [i];
528		1176
		1177	if (w->reschedule_cb)
		1178	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
529	if (w->interval)	1179	else if (w->interval)
		1180	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1181	}
		1182
		1183	/* now rebuild the heap */
		1184	for (i = periodiccnt >> 1; i--; )
		1185	downheap ((WT *)periodics, periodiccnt, i);
		1186	}
		1187	#endif
		1188
		1189	int inline_size
		1190	time_update_monotonic (EV_P)
		1191	{
		1192	mn_now = get_clock ();
		1193
		1194	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1195	{
		1196	ev_rt_now = rtmn_diff + mn_now;
		1197	return 0;
		1198	}
		1199	else
		1200	{
		1201	now_floor = mn_now;
		1202	ev_rt_now = ev_time ();
		1203	return 1;
		1204	}
		1205	}
		1206
		1207	void inline_size
		1208	time_update (EV_P)
		1209	{
		1210	int i;
		1211
		1212	#if EV_USE_MONOTONIC
		1213	if (expect_true (have_monotonic))
		1214	{
		1215	if (time_update_monotonic (EV_A))
530	{	1216	{
531	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1217	ev_tstamp odiff = rtmn_diff;
532		1218
533	if (fabs (diff) >= 1e-4)	1219	/* loop a few times, before making important decisions.
		1220	* on the choice of "4": one iteration isn't enough,
		1221	* in case we get preempted during the calls to
		1222	* ev_time and get_clock. a second call is almost guarenteed
		1223	* to succeed in that case, though. and looping a few more times
		1224	* doesn't hurt either as we only do this on time-jumps or
		1225	* in the unlikely event of getting preempted here.
		1226	*/
		1227	for (i = 4; --i; )
534	{	1228	{
535	evperiodic_stop (w);	1229	rtmn_diff = ev_rt_now - mn_now;
536	evperiodic_start (w);
537		1230
538	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1231	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1232	return; /* all is well */
		1233
		1234	ev_rt_now = ev_time ();
		1235	mn_now = get_clock ();
		1236	now_floor = mn_now;
539	}	1237	}
		1238
		1239	# if EV_PERIODIC_ENABLE
		1240	periodics_reschedule (EV_A);
		1241	# endif
		1242	/* no timer adjustment, as the monotonic clock doesn't jump */
		1243	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
540	}	1244	}
541	}	1245	}
542	}	1246	else
543		1247	#endif
544	static void	1248	{
545	time_update ()
546	{
547	int i;
548
549	ev_now = ev_time ();	1249	ev_rt_now = ev_time ();
550		1250
551	if (have_monotonic)	1251	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
552	{
553	ev_tstamp odiff = diff;
554
555	for (i = 4; --i; ) /* loop a few times, before making important decisions */
556	{	1252	{
557	now = get_clock ();	1253	#if EV_PERIODIC_ENABLE
558	diff = ev_now - now;
559
560	if (fabs (odiff - diff) < MIN_TIMEJUMP)
561	return; /* all is well */
562
563	ev_now = ev_time ();
564	}
565
566	periodics_reschedule (diff - odiff);
567	/* no timer adjustment, as the monotonic clock doesn't jump */
568	}
569	else
570	{
571	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
572	{
573	periodics_reschedule (ev_now - now);	1254	periodics_reschedule (EV_A);
		1255	#endif
574		1256
575	/* adjust timers. this is easy, as the offset is the same for all */	1257	/* adjust timers. this is easy, as the offset is the same for all */
576	for (i = 0; i < timercnt; ++i)	1258	for (i = 0; i < timercnt; ++i)
577	timers [i]->at += diff;	1259	((WT)timers [i])->at += ev_rt_now - mn_now;
578	}	1260	}
579		1261
580	now = ev_now;	1262	mn_now = ev_rt_now;
581	}
582	}
583
584	int ev_loop_done;
585
586	void ev_loop (int flags)
587	{
588	double block;
589	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
590
591	do
592	{	1263	}
		1264	}
		1265
		1266	void
		1267	ev_ref (EV_P)
		1268	{
		1269	++activecnt;
		1270	}
		1271
		1272	void
		1273	ev_unref (EV_P)
		1274	{
		1275	--activecnt;
		1276	}
		1277
		1278	static int loop_done;
		1279
		1280	void
		1281	ev_loop (EV_P_ int flags)
		1282	{
		1283	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1284	? EVUNLOOP_ONE
		1285	: EVUNLOOP_CANCEL;
		1286
		1287	while (activecnt)
		1288	{
		1289	/* we might have forked, so reify kernel state if necessary */
		1290	#if EV_FORK_ENABLE
		1291	if (expect_false (postfork))
		1292	if (forkcnt)
		1293	{
		1294	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1295	call_pending (EV_A);
		1296	}
		1297	#endif
		1298
593	/* queue check watchers (and execute them) */	1299	/* queue check watchers (and execute them) */
594	if (preparecnt)	1300	if (expect_false (preparecnt))
595	{	1301	{
596	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1302	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
597	call_pending ();	1303	call_pending (EV_A);
598	}	1304	}
599		1305
		1306	/* we might have forked, so reify kernel state if necessary */
		1307	if (expect_false (postfork))
		1308	loop_fork (EV_A);
		1309
600	/* update fd-related kernel structures */	1310	/* update fd-related kernel structures */
601	fd_reify ();	1311	fd_reify (EV_A);
602		1312
603	/* calculate blocking time */	1313	/* calculate blocking time */
		1314	{
		1315	double block;
604		1316
605	/* we only need this for !monotonic clockor timers, but as we basically
606	always have timers, we just calculate it always */
607	ev_now = ev_time ();
608
609	if (flags & EVLOOP_NONBLOCK || idlecnt)	1317	if (flags & EVLOOP_NONBLOCK || idlecnt)
610	block = 0.;	1318	block = 0.; /* do not block at all */
611	else	1319	else
612	{	1320	{
		1321	/* update time to cancel out callback processing overhead */
		1322	#if EV_USE_MONOTONIC
		1323	if (expect_true (have_monotonic))
		1324	time_update_monotonic (EV_A);
		1325	else
		1326	#endif
		1327	{
		1328	ev_rt_now = ev_time ();
		1329	mn_now = ev_rt_now;
		1330	}
		1331
613	block = MAX_BLOCKTIME;	1332	block = MAX_BLOCKTIME;
614		1333
615	if (timercnt)	1334	if (timercnt)
616	{	1335	{
617	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1336	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
618	if (block > to) block = to;	1337	if (block > to) block = to;
619	}	1338	}
620		1339
		1340	#if EV_PERIODIC_ENABLE
621	if (periodiccnt)	1341	if (periodiccnt)
622	{	1342	{
623	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1343	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
624	if (block > to) block = to;	1344	if (block > to) block = to;
625	}	1345	}
		1346	#endif
626		1347
627	if (block < 0.) block = 0.;	1348	if (expect_false (block < 0.)) block = 0.;
628	}	1349	}
629		1350
630	method_poll (block);	1351	backend_poll (EV_A_ block);
		1352	}
631		1353
632	/* update ev_now, do magic */	1354	/* update ev_rt_now, do magic */
633	time_update ();	1355	time_update (EV_A);
634		1356
635	/* queue pending timers and reschedule them */	1357	/* queue pending timers and reschedule them */
636	timers_reify (); /* relative timers called last */	1358	timers_reify (EV_A); /* relative timers called last */
		1359	#if EV_PERIODIC_ENABLE
637	periodics_reify (); /* absolute timers called first */	1360	periodics_reify (EV_A); /* absolute timers called first */
		1361	#endif
638		1362
639	/* queue idle watchers unless io or timers are pending */	1363	/* queue idle watchers unless other events are pending */
640	if (!pendingcnt)	1364	if (idlecnt && !any_pending (EV_A))
641	queue_events ((W *)idles, idlecnt, EV_IDLE);	1365	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
642		1366
643	/* queue check watchers, to be executed first */	1367	/* queue check watchers, to be executed first */
644	if (checkcnt)	1368	if (expect_false (checkcnt))
645	queue_events ((W *)checks, checkcnt, EV_CHECK);	1369	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
646		1370
647	call_pending ();	1371	call_pending (EV_A);
648	}
649	while (!ev_loop_done);
650		1372
651	if (ev_loop_done != 2)	1373	if (expect_false (loop_done))
		1374	break;
		1375	}
		1376
		1377	if (loop_done == EVUNLOOP_ONE)
		1378	loop_done = EVUNLOOP_CANCEL;
		1379	}
		1380
		1381	void
		1382	ev_unloop (EV_P_ int how)
		1383	{
652	ev_loop_done = 0;	1384	loop_done = how;
653	}	1385	}
654		1386
655	/*****************************************************************************/	1387	/*****************************************************************************/
656		1388
657	static void	1389	void inline_size
658	wlist_add (WL *head, WL elem)	1390	wlist_add (WL *head, WL elem)
659	{	1391	{
660	elem->next = *head;	1392	elem->next = *head;
661	*head = elem;	1393	*head = elem;
662	}	1394	}
663		1395
664	static void	1396	void inline_size
665	wlist_del (WL *head, WL elem)	1397	wlist_del (WL *head, WL elem)
666	{	1398	{
667	while (*head)	1399	while (*head)
668	{	1400	{
669	if (*head == elem)	1401	if (*head == elem)
…		…
674		1406
675	head = &(*head)->next;	1407	head = &(*head)->next;
676	}	1408	}
677	}	1409	}
678		1410
679	static void	1411	void inline_speed
680	ev_clear (W w)	1412	ev_clear_pending (EV_P_ W w)
681	{	1413	{
682	if (w->pending)	1414	if (w->pending)
683	{	1415	{
684	pendings [w->pending - 1].w = 0;	1416	pendings [ABSPRI (w)][w->pending - 1].w = 0;
685	w->pending = 0;	1417	w->pending = 0;
686	}	1418	}
687	}	1419	}
688		1420
689	static void	1421	void inline_speed
690	ev_start (W w, int active)	1422	ev_start (EV_P_ W w, int active)
691	{	1423	{
		1424	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1425	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1426
692	w->active = active;	1427	w->active = active;
		1428	ev_ref (EV_A);
693	}	1429	}
694		1430
695	static void	1431	void inline_size
696	ev_stop (W w)	1432	ev_stop (EV_P_ W w)
697	{	1433	{
		1434	ev_unref (EV_A);
698	w->active = 0;	1435	w->active = 0;
699	}	1436	}
700		1437
701	/*****************************************************************************/	1438	/*****************************************************************************/
702		1439
703	void	1440	void
704	evio_start (struct ev_io *w)	1441	ev_io_start (EV_P_ ev_io *w)
705	{	1442	{
706	if (ev_is_active (w))
707	return;
708
709	int fd = w->fd;	1443	int fd = w->fd;
710		1444
		1445	if (expect_false (ev_is_active (w)))
		1446	return;
		1447
		1448	assert (("ev_io_start called with negative fd", fd >= 0));
		1449
711	ev_start ((W)w, 1);	1450	ev_start (EV_A_ (W)w, 1);
712	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1451	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
713	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1452	wlist_add ((WL *)&anfds[fd].head, (WL)w);
714		1453
715	++fdchangecnt;	1454	fd_change (EV_A_ fd);
716	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
717	fdchanges [fdchangecnt - 1] = fd;
718	}	1455	}
719		1456
720	void	1457	void
721	evio_stop (struct ev_io *w)	1458	ev_io_stop (EV_P_ ev_io *w)
722	{	1459	{
723	ev_clear ((W)w);	1460	ev_clear_pending (EV_A_ (W)w);
724	if (!ev_is_active (w))	1461	if (expect_false (!ev_is_active (w)))
725	return;	1462	return;
		1463
		1464	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
726		1465
727	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1466	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
728	ev_stop ((W)w);	1467	ev_stop (EV_A_ (W)w);
729		1468
730	++fdchangecnt;	1469	fd_change (EV_A_ w->fd);
731	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
732	fdchanges [fdchangecnt - 1] = w->fd;
733	}	1470	}
734		1471
735	void	1472	void
736	evtimer_start (struct ev_timer *w)	1473	ev_timer_start (EV_P_ ev_timer *w)
737	{	1474	{
738	if (ev_is_active (w))	1475	if (expect_false (ev_is_active (w)))
739	return;	1476	return;
740		1477
741	w->at += now;	1478	((WT)w)->at += mn_now;
742		1479
743	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1480	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
744		1481
745	ev_start ((W)w, ++timercnt);	1482	ev_start (EV_A_ (W)w, ++timercnt);
746	array_needsize (timers, timermax, timercnt, );	1483	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
747	timers [timercnt - 1] = w;	1484	timers [timercnt - 1] = w;
748	upheap ((WT *)timers, timercnt - 1);	1485	upheap ((WT *)timers, timercnt - 1);
749	}
750		1486
		1487	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1488	}
		1489
751	void	1490	void
752	evtimer_stop (struct ev_timer *w)	1491	ev_timer_stop (EV_P_ ev_timer *w)
753	{	1492	{
754	ev_clear ((W)w);	1493	ev_clear_pending (EV_A_ (W)w);
755	if (!ev_is_active (w))	1494	if (expect_false (!ev_is_active (w)))
756	return;	1495	return;
757		1496
		1497	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1498
758	if (w->active < timercnt--)	1499	if (expect_true (((W)w)->active < timercnt--))
759	{	1500	{
760	timers [w->active - 1] = timers [timercnt];	1501	timers [((W)w)->active - 1] = timers [timercnt];
761	downheap ((WT *)timers, timercnt, w->active - 1);	1502	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
762	}	1503	}
763		1504
764	w->at = w->repeat;	1505	((WT)w)->at -= mn_now;
765		1506
766	ev_stop ((W)w);	1507	ev_stop (EV_A_ (W)w);
767	}	1508	}
768		1509
769	void	1510	void
770	evtimer_again (struct ev_timer *w)	1511	ev_timer_again (EV_P_ ev_timer *w)
771	{	1512	{
772	if (ev_is_active (w))	1513	if (ev_is_active (w))
773	{	1514	{
774	if (w->repeat)	1515	if (w->repeat)
775	{	1516	{
776	w->at = now + w->repeat;	1517	((WT)w)->at = mn_now + w->repeat;
777	downheap ((WT *)timers, timercnt, w->active - 1);	1518	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
778	}	1519	}
779	else	1520	else
780	evtimer_stop (w);	1521	ev_timer_stop (EV_A_ w);
781	}	1522	}
782	else if (w->repeat)	1523	else if (w->repeat)
		1524	{
		1525	w->at = w->repeat;
783	evtimer_start (w);	1526	ev_timer_start (EV_A_ w);
		1527	}
784	}	1528	}
785		1529
		1530	#if EV_PERIODIC_ENABLE
786	void	1531	void
787	evperiodic_start (struct ev_periodic *w)	1532	ev_periodic_start (EV_P_ ev_periodic *w)
788	{	1533	{
789	if (ev_is_active (w))	1534	if (expect_false (ev_is_active (w)))
790	return;	1535	return;
791		1536
792	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1537	if (w->reschedule_cb)
793		1538	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1539	else if (w->interval)
		1540	{
		1541	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
794	/* this formula differs from the one in periodic_reify because we do not always round up */	1542	/* this formula differs from the one in periodic_reify because we do not always round up */
795	if (w->interval)
796	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1543	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1544	}
797		1545
798	ev_start ((W)w, ++periodiccnt);	1546	ev_start (EV_A_ (W)w, ++periodiccnt);
799	array_needsize (periodics, periodicmax, periodiccnt, );	1547	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
800	periodics [periodiccnt - 1] = w;	1548	periodics [periodiccnt - 1] = w;
801	upheap ((WT *)periodics, periodiccnt - 1);	1549	upheap ((WT *)periodics, periodiccnt - 1);
802	}
803		1550
		1551	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1552	}
		1553
804	void	1554	void
805	evperiodic_stop (struct ev_periodic *w)	1555	ev_periodic_stop (EV_P_ ev_periodic *w)
806	{	1556	{
807	ev_clear ((W)w);	1557	ev_clear_pending (EV_A_ (W)w);
808	if (!ev_is_active (w))	1558	if (expect_false (!ev_is_active (w)))
809	return;	1559	return;
810		1560
		1561	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1562
811	if (w->active < periodiccnt--)	1563	if (expect_true (((W)w)->active < periodiccnt--))
812	{	1564	{
813	periodics [w->active - 1] = periodics [periodiccnt];	1565	periodics [((W)w)->active - 1] = periodics [periodiccnt];
814	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1566	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
815	}	1567	}
816		1568
817	ev_stop ((W)w);	1569	ev_stop (EV_A_ (W)w);
818	}	1570	}
819		1571
820	void	1572	void
		1573	ev_periodic_again (EV_P_ ev_periodic *w)
		1574	{
		1575	/* TODO: use adjustheap and recalculation */
		1576	ev_periodic_stop (EV_A_ w);
		1577	ev_periodic_start (EV_A_ w);
		1578	}
		1579	#endif
		1580
		1581	#ifndef SA_RESTART
		1582	# define SA_RESTART 0
		1583	#endif
		1584
		1585	void
821	evsignal_start (struct ev_signal *w)	1586	ev_signal_start (EV_P_ ev_signal *w)
822	{	1587	{
		1588	#if EV_MULTIPLICITY
		1589	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1590	#endif
823	if (ev_is_active (w))	1591	if (expect_false (ev_is_active (w)))
824	return;	1592	return;
825		1593
		1594	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1595
826	ev_start ((W)w, 1);	1596	ev_start (EV_A_ (W)w, 1);
827	array_needsize (signals, signalmax, w->signum, signals_init);	1597	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
828	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1598	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
829		1599
830	if (!w->next)	1600	if (!((WL)w)->next)
831	{	1601	{
		1602	#if _WIN32
		1603	signal (w->signum, sighandler);
		1604	#else
832	struct sigaction sa;	1605	struct sigaction sa;
833	sa.sa_handler = sighandler;	1606	sa.sa_handler = sighandler;
834	sigfillset (&sa.sa_mask);	1607	sigfillset (&sa.sa_mask);
835	sa.sa_flags = 0;	1608	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
836	sigaction (w->signum, &sa, 0);	1609	sigaction (w->signum, &sa, 0);
		1610	#endif
837	}	1611	}
838	}	1612	}
839		1613
840	void	1614	void
841	evsignal_stop (struct ev_signal *w)	1615	ev_signal_stop (EV_P_ ev_signal *w)
842	{	1616	{
843	ev_clear ((W)w);	1617	ev_clear_pending (EV_A_ (W)w);
844	if (!ev_is_active (w))	1618	if (expect_false (!ev_is_active (w)))
845	return;	1619	return;
846		1620
847	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1621	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
848	ev_stop ((W)w);	1622	ev_stop (EV_A_ (W)w);
849		1623
850	if (!signals [w->signum - 1].head)	1624	if (!signals [w->signum - 1].head)
851	signal (w->signum, SIG_DFL);	1625	signal (w->signum, SIG_DFL);
852	}	1626	}
853		1627
854	void evidle_start (struct ev_idle *w)	1628	void
		1629	ev_child_start (EV_P_ ev_child *w)
855	{	1630	{
		1631	#if EV_MULTIPLICITY
		1632	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1633	#endif
856	if (ev_is_active (w))	1634	if (expect_false (ev_is_active (w)))
857	return;	1635	return;
858		1636
		1637	ev_start (EV_A_ (W)w, 1);
		1638	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1639	}
		1640
		1641	void
		1642	ev_child_stop (EV_P_ ev_child *w)
		1643	{
		1644	ev_clear_pending (EV_A_ (W)w);
		1645	if (expect_false (!ev_is_active (w)))
		1646	return;
		1647
		1648	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1649	ev_stop (EV_A_ (W)w);
		1650	}
		1651
		1652	#if EV_STAT_ENABLE
		1653
		1654	# ifdef _WIN32
		1655	# undef lstat
		1656	# define lstat(a,b) _stati64 (a,b)
		1657	# endif
		1658
		1659	#define DEF_STAT_INTERVAL 5.0074891
		1660	#define MIN_STAT_INTERVAL 0.1074891
		1661
		1662	void
		1663	ev_stat_stat (EV_P_ ev_stat *w)
		1664	{
		1665	if (lstat (w->path, &w->attr) < 0)
		1666	w->attr.st_nlink = 0;
		1667	else if (!w->attr.st_nlink)
		1668	w->attr.st_nlink = 1;
		1669	}
		1670
		1671	static void
		1672	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1673	{
		1674	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		1675
		1676	/* we copy this here each the time so that */
		1677	/* prev has the old value when the callback gets invoked */
		1678	w->prev = w->attr;
		1679	ev_stat_stat (EV_A_ w);
		1680
		1681	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
		1682	ev_feed_event (EV_A_ w, EV_STAT);
		1683	}
		1684
		1685	void
		1686	ev_stat_start (EV_P_ ev_stat *w)
		1687	{
		1688	if (expect_false (ev_is_active (w)))
		1689	return;
		1690
		1691	/* since we use memcmp, we need to clear any padding data etc. */
		1692	memset (&w->prev, 0, sizeof (ev_statdata));
		1693	memset (&w->attr, 0, sizeof (ev_statdata));
		1694
		1695	ev_stat_stat (EV_A_ w);
		1696
		1697	if (w->interval < MIN_STAT_INTERVAL)
		1698	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		1699
		1700	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		1701	ev_set_priority (&w->timer, ev_priority (w));
		1702	ev_timer_start (EV_A_ &w->timer);
		1703
		1704	ev_start (EV_A_ (W)w, 1);
		1705	}
		1706
		1707	void
		1708	ev_stat_stop (EV_P_ ev_stat *w)
		1709	{
		1710	ev_clear_pending (EV_A_ (W)w);
		1711	if (expect_false (!ev_is_active (w)))
		1712	return;
		1713
		1714	ev_timer_stop (EV_A_ &w->timer);
		1715
		1716	ev_stop (EV_A_ (W)w);
		1717	}
		1718	#endif
		1719
		1720	void
		1721	ev_idle_start (EV_P_ ev_idle *w)
		1722	{
		1723	if (expect_false (ev_is_active (w)))
		1724	return;
		1725
859	ev_start ((W)w, ++idlecnt);	1726	ev_start (EV_A_ (W)w, ++idlecnt);
860	array_needsize (idles, idlemax, idlecnt, );	1727	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
861	idles [idlecnt - 1] = w;	1728	idles [idlecnt - 1] = w;
862	}	1729	}
863		1730
864	void evidle_stop (struct ev_idle *w)	1731	void
		1732	ev_idle_stop (EV_P_ ev_idle *w)
865	{	1733	{
866	ev_clear ((W)w);	1734	ev_clear_pending (EV_A_ (W)w);
867	if (ev_is_active (w))	1735	if (expect_false (!ev_is_active (w)))
868	return;	1736	return;
869		1737
		1738	{
		1739	int active = ((W)w)->active;
870	idles [w->active - 1] = idles [--idlecnt];	1740	idles [active - 1] = idles [--idlecnt];
		1741	((W)idles [active - 1])->active = active;
		1742	}
		1743
871	ev_stop ((W)w);	1744	ev_stop (EV_A_ (W)w);
872	}	1745	}
873		1746
		1747	void
874	void evprepare_start (struct ev_prepare *w)	1748	ev_prepare_start (EV_P_ ev_prepare *w)
875	{	1749	{
876	if (ev_is_active (w))	1750	if (expect_false (ev_is_active (w)))
877	return;	1751	return;
878		1752
879	ev_start ((W)w, ++preparecnt);	1753	ev_start (EV_A_ (W)w, ++preparecnt);
880	array_needsize (prepares, preparemax, preparecnt, );	1754	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
881	prepares [preparecnt - 1] = w;	1755	prepares [preparecnt - 1] = w;
882	}	1756	}
883		1757
		1758	void
884	void evprepare_stop (struct ev_prepare *w)	1759	ev_prepare_stop (EV_P_ ev_prepare *w)
885	{	1760	{
886	ev_clear ((W)w);	1761	ev_clear_pending (EV_A_ (W)w);
887	if (ev_is_active (w))	1762	if (expect_false (!ev_is_active (w)))
888	return;	1763	return;
889		1764
		1765	{
		1766	int active = ((W)w)->active;
890	prepares [w->active - 1] = prepares [--preparecnt];	1767	prepares [active - 1] = prepares [--preparecnt];
		1768	((W)prepares [active - 1])->active = active;
		1769	}
		1770
891	ev_stop ((W)w);	1771	ev_stop (EV_A_ (W)w);
892	}	1772	}
893		1773
		1774	void
894	void evcheck_start (struct ev_check *w)	1775	ev_check_start (EV_P_ ev_check *w)
895	{	1776	{
896	if (ev_is_active (w))	1777	if (expect_false (ev_is_active (w)))
897	return;	1778	return;
898		1779
899	ev_start ((W)w, ++checkcnt);	1780	ev_start (EV_A_ (W)w, ++checkcnt);
900	array_needsize (checks, checkmax, checkcnt, );	1781	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
901	checks [checkcnt - 1] = w;	1782	checks [checkcnt - 1] = w;
902	}	1783	}
903		1784
		1785	void
904	void evcheck_stop (struct ev_check *w)	1786	ev_check_stop (EV_P_ ev_check *w)
905	{	1787	{
906	ev_clear ((W)w);	1788	ev_clear_pending (EV_A_ (W)w);
907	if (ev_is_active (w))	1789	if (expect_false (!ev_is_active (w)))
908	return;	1790	return;
909		1791
		1792	{
		1793	int active = ((W)w)->active;
910	checks [w->active - 1] = checks [--checkcnt];	1794	checks [active - 1] = checks [--checkcnt];
		1795	((W)checks [active - 1])->active = active;
		1796	}
		1797
911	ev_stop ((W)w);	1798	ev_stop (EV_A_ (W)w);
912	}	1799	}
913		1800
914	void evchild_start (struct ev_child *w)	1801	#if EV_EMBED_ENABLE
		1802	void noinline
		1803	ev_embed_sweep (EV_P_ ev_embed *w)
915	{	1804	{
		1805	ev_loop (w->loop, EVLOOP_NONBLOCK);
		1806	}
		1807
		1808	static void
		1809	embed_cb (EV_P_ ev_io *io, int revents)
		1810	{
		1811	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		1812
916	if (ev_is_active (w))	1813	if (ev_cb (w))
917	return;	1814	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		1815	else
		1816	ev_embed_sweep (loop, w);
		1817	}
918		1818
		1819	void
		1820	ev_embed_start (EV_P_ ev_embed *w)
		1821	{
		1822	if (expect_false (ev_is_active (w)))
		1823	return;
		1824
		1825	{
		1826	struct ev_loop *loop = w->loop;
		1827	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		1828	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		1829	}
		1830
		1831	ev_set_priority (&w->io, ev_priority (w));
		1832	ev_io_start (EV_A_ &w->io);
		1833
919	ev_start ((W)w, 1);	1834	ev_start (EV_A_ (W)w, 1);
920	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
921	}	1835	}
922		1836
923	void evchild_stop (struct ev_child *w)	1837	void
		1838	ev_embed_stop (EV_P_ ev_embed *w)
924	{	1839	{
925	ev_clear ((W)w);	1840	ev_clear_pending (EV_A_ (W)w);
926	if (ev_is_active (w))	1841	if (expect_false (!ev_is_active (w)))
927	return;	1842	return;
928		1843
929	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1844	ev_io_stop (EV_A_ &w->io);
		1845
930	ev_stop ((W)w);	1846	ev_stop (EV_A_ (W)w);
931	}	1847	}
		1848	#endif
		1849
		1850	#if EV_FORK_ENABLE
		1851	void
		1852	ev_fork_start (EV_P_ ev_fork *w)
		1853	{
		1854	if (expect_false (ev_is_active (w)))
		1855	return;
		1856
		1857	ev_start (EV_A_ (W)w, ++forkcnt);
		1858	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		1859	forks [forkcnt - 1] = w;
		1860	}
		1861
		1862	void
		1863	ev_fork_stop (EV_P_ ev_fork *w)
		1864	{
		1865	ev_clear_pending (EV_A_ (W)w);
		1866	if (expect_false (!ev_is_active (w)))
		1867	return;
		1868
		1869	{
		1870	int active = ((W)w)->active;
		1871	forks [active - 1] = forks [--forkcnt];
		1872	((W)forks [active - 1])->active = active;
		1873	}
		1874
		1875	ev_stop (EV_A_ (W)w);
		1876	}
		1877	#endif
932		1878
933	/*****************************************************************************/	1879	/*****************************************************************************/
934		1880
935	struct ev_once	1881	struct ev_once
936	{	1882	{
937	struct ev_io io;	1883	ev_io io;
938	struct ev_timer to;	1884	ev_timer to;
939	void (*cb)(int revents, void *arg);	1885	void (*cb)(int revents, void *arg);
940	void *arg;	1886	void *arg;
941	};	1887	};
942		1888
943	static void	1889	static void
944	once_cb (struct ev_once *once, int revents)	1890	once_cb (EV_P_ struct ev_once *once, int revents)
945	{	1891	{
946	void (*cb)(int revents, void *arg) = once->cb;	1892	void (*cb)(int revents, void *arg) = once->cb;
947	void *arg = once->arg;	1893	void *arg = once->arg;
948		1894
949	evio_stop (&once->io);	1895	ev_io_stop (EV_A_ &once->io);
950	evtimer_stop (&once->to);	1896	ev_timer_stop (EV_A_ &once->to);
951	free (once);	1897	ev_free (once);
952		1898
953	cb (revents, arg);	1899	cb (revents, arg);
954	}	1900	}
955		1901
956	static void	1902	static void
957	once_cb_io (struct ev_io *w, int revents)	1903	once_cb_io (EV_P_ ev_io *w, int revents)
958	{	1904	{
959	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1905	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
960	}	1906	}
961		1907
962	static void	1908	static void
963	once_cb_to (struct ev_timer *w, int revents)	1909	once_cb_to (EV_P_ ev_timer *w, int revents)
964	{	1910	{
965	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1911	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
966	}	1912	}
967		1913
968	void	1914	void
969	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1915	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
970	{	1916	{
971	struct ev_once *once = malloc (sizeof (struct ev_once));	1917	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
972		1918
973	if (!once)	1919	if (expect_false (!once))
974	cb (EV_ERROR, arg);	1920	{
975	else	1921	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1922	return;
976	{	1923	}
		1924
977	once->cb = cb;	1925	once->cb = cb;
978	once->arg = arg;	1926	once->arg = arg;
979		1927
980	evw_init (&once->io, once_cb_io);	1928	ev_init (&once->io, once_cb_io);
981
982	if (fd >= 0)	1929	if (fd >= 0)
983	{	1930	{
984	evio_set (&once->io, fd, events);	1931	ev_io_set (&once->io, fd, events);
985	evio_start (&once->io);	1932	ev_io_start (EV_A_ &once->io);
986	}	1933	}
987		1934
988	evw_init (&once->to, once_cb_to);	1935	ev_init (&once->to, once_cb_to);
989
990	if (timeout >= 0.)	1936	if (timeout >= 0.)
991	{	1937	{
992	evtimer_set (&once->to, timeout, 0.);	1938	ev_timer_set (&once->to, timeout, 0.);
993	evtimer_start (&once->to);	1939	ev_timer_start (EV_A_ &once->to);
994	}
995	}
996	}
997
998	/*****************************************************************************/
999
1000	#if 0
1001
1002	struct ev_io wio;
1003
1004	static void
1005	sin_cb (struct ev_io *w, int revents)
1006	{
1007	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1008	}
1009
1010	static void
1011	ocb (struct ev_timer *w, int revents)
1012	{
1013	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1014	evtimer_stop (w);
1015	evtimer_start (w);
1016	}
1017
1018	static void
1019	scb (struct ev_signal *w, int revents)
1020	{
1021	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1022	evio_stop (&wio);
1023	evio_start (&wio);
1024	}
1025
1026	static void
1027	gcb (struct ev_signal *w, int revents)
1028	{
1029	fprintf (stderr, "generic %x\n", revents);
1030
1031	}
1032
1033	int main (void)
1034	{
1035	ev_init (0);
1036
1037	evio_init (&wio, sin_cb, 0, EV_READ);
1038	evio_start (&wio);
1039
1040	struct ev_timer t[10000];
1041
1042	#if 0
1043	int i;
1044	for (i = 0; i < 10000; ++i)
1045	{	1940	}
1046	struct ev_timer *w = t + i;
1047	evw_init (w, ocb, i);
1048	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1049	evtimer_start (w);
1050	if (drand48 () < 0.5)
1051	evtimer_stop (w);
1052	}
1053	#endif
1054
1055	struct ev_timer t1;
1056	evtimer_init (&t1, ocb, 5, 10);
1057	evtimer_start (&t1);
1058
1059	struct ev_signal sig;
1060	evsignal_init (&sig, scb, SIGQUIT);
1061	evsignal_start (&sig);
1062
1063	struct ev_check cw;
1064	evcheck_init (&cw, gcb);
1065	evcheck_start (&cw);
1066
1067	struct ev_idle iw;
1068	evidle_init (&iw, gcb);
1069	evidle_start (&iw);
1070
1071	ev_loop (0);
1072
1073	return 0;
1074	}	1941	}
1075		1942
		1943	#ifdef __cplusplus
		1944	}
1076	#endif	1945	#endif
1077		1946
1078
1079
1080

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