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Comparing libev/ev.c (file contents):
Revision 1.20 by root, Wed Oct 31 18:28:00 2007 UTC vs.
Revision 1.148 by root, Tue Nov 27 11:11:13 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/time.h>	110	#include <sys/types.h>
42	#include <time.h>	111	#include <time.h>
43		112
44	#ifndef HAVE_MONOTONIC	113	#include <signal.h>
45	# ifdef CLOCK_MONOTONIC	114
46	# 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
47	# endif	124	# endif
48	#endif	125	#endif
49		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
50	#ifndef HAVE_SELECT	137	#ifndef EV_USE_SELECT
51	# 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
52	#endif	146	# endif
		147	#endif
53		148
54	#ifndef HAVE_EPOLL	149	#ifndef EV_USE_EPOLL
55	# define HAVE_EPOLL 0	150	# define EV_USE_EPOLL 0
56	#endif	151	#endif
57		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
58	#ifndef HAVE_REALTIME	168	#ifndef CLOCK_REALTIME
59	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	169	# undef EV_USE_REALTIME
		170	# define EV_USE_REALTIME 0
60	#endif	171	#endif
		172
		173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
		175	#endif
		176
		177	/**/
61		178
62	#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) */
63	#define MAX_BLOCKTIME 60.	180	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		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 */
64		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
65	#include "ev.h"	187	# include "ev.h"
		188	#endif
66		189
		190	#if __GNUC__ >= 3
		191	# define expect(expr,value) __builtin_expect ((expr),(value))
		192	# define inline_size static inline /* inline for codesize */
		193	# if EV_MINIMAL
		194	# define noinline __attribute__ ((noinline))
		195	# define inline_speed static noinline
		196	# else
		197	# define noinline
		198	# define inline_speed static inline
		199	# endif
		200	#else
		201	# define expect(expr,value) (expr)
		202	# define inline_speed static
		203	# define inline_size static
		204	# define noinline
		205	#endif
		206
		207	#define expect_false(expr) expect ((expr) != 0, 0)
		208	#define expect_true(expr) expect ((expr) != 0, 1)
		209
		210	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		211	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		212
		213	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		214	#define EMPTY2(a,b) /* used to suppress some warnings */
		215
67	typedef struct ev_watcher *W;	216	typedef ev_watcher *W;
68	typedef struct ev_watcher_list *WL;	217	typedef ev_watcher_list *WL;
69	typedef struct ev_watcher_time *WT;	218	typedef ev_watcher_time *WT;
70		219
71	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
72	ev_tstamp ev_now;	311	ev_tstamp ev_rt_now;
73	int ev_method;	312	#define VAR(name,decl) static decl;
		313	#include "ev_vars.h"
		314	#undef VAR
74		315
75	static int have_monotonic; /* runtime */	316	static int ev_default_loop_ptr;
76		317
77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	318	#endif
78	static void (*method_modify)(int fd, int oev, int nev);
79	static void (*method_poll)(ev_tstamp timeout);
80		319
81	/*****************************************************************************/	320	/*****************************************************************************/
82		321
83	ev_tstamp	322	ev_tstamp
84	ev_time (void)	323	ev_time (void)
85	{	324	{
86	#if HAVE_REALTIME	325	#if EV_USE_REALTIME
87	struct timespec ts;	326	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	327	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	328	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	329	#else
91	struct timeval tv;	330	struct timeval tv;
92	gettimeofday (&tv, 0);	331	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	332	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	333	#endif
95	}	334	}
96		335
97	static ev_tstamp	336	ev_tstamp inline_size
98	get_clock (void)	337	get_clock (void)
99	{	338	{
100	#if HAVE_MONOTONIC	339	#if EV_USE_MONOTONIC
101	if (have_monotonic)	340	if (expect_true (have_monotonic))
102	{	341	{
103	struct timespec ts;	342	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	343	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	344	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	345	}
107	#endif	346	#endif
108		347
109	return ev_time ();	348	return ev_time ();
110	}	349	}
111		350
		351	#if EV_MULTIPLICITY
		352	ev_tstamp
		353	ev_now (EV_P)
		354	{
		355	return ev_rt_now;
		356	}
		357	#endif
		358
		359	#define array_roundsize(type,n) (((n) | 4) & ~3)
		360
112	#define array_needsize(base,cur,cnt,init) \	361	#define array_needsize(type,base,cur,cnt,init) \
113	if ((cnt) > cur) \	362	if (expect_false ((cnt) > cur)) \
114	{ \	363	{ \
115	int newcnt = cur ? cur << 1 : 16; \	364	int newcnt = cur; \
		365	do \
		366	{ \
		367	newcnt = array_roundsize (type, newcnt << 1); \
		368	} \
		369	while ((cnt) > newcnt); \
		370	\
116	base = realloc (base, sizeof (*base) * (newcnt)); \	371	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
117	init (base + cur, newcnt - cur); \	372	init (base + cur, newcnt - cur); \
118	cur = newcnt; \	373	cur = newcnt; \
119	}	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;
120		386
121	/*****************************************************************************/	387	/*****************************************************************************/
122		388
		389	void noinline
		390	ev_feed_event (EV_P_ void *w, int revents)
		391	{
		392	W w_ = (W)w;
		393
		394	if (expect_false (w_->pending))
		395	{
		396	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		397	return;
		398	}
		399
		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
		418	anfds_init (ANFD *base, int count)
		419	{
		420	while (count--)
		421	{
		422	base->head = 0;
		423	base->events = EV_NONE;
		424	base->reify = 0;
		425
		426	++base;
		427	}
		428	}
		429
		430	void inline_speed
		431	fd_event (EV_P_ int fd, int revents)
		432	{
		433	ANFD *anfd = anfds + fd;
		434	ev_io *w;
		435
		436	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		437	{
		438	int ev = w->events & revents;
		439
		440	if (ev)
		441	ev_feed_event (EV_A_ (W)w, ev);
		442	}
		443	}
		444
		445	void
		446	ev_feed_fd_event (EV_P_ int fd, int revents)
		447	{
		448	fd_event (EV_A_ fd, revents);
		449	}
		450
		451	void inline_size
		452	fd_reify (EV_P)
		453	{
		454	int i;
		455
		456	for (i = 0; i < fdchangecnt; ++i)
		457	{
		458	int fd = fdchanges [i];
		459	ANFD *anfd = anfds + fd;
		460	ev_io *w;
		461
		462	int events = 0;
		463
		464	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		465	events |= w->events;
		466
		467	#if EV_SELECT_IS_WINSOCKET
		468	if (events)
		469	{
		470	unsigned long argp;
		471	anfd->handle = _get_osfhandle (fd);
		472	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		473	}
		474	#endif
		475
		476	anfd->reify = 0;
		477
		478	backend_modify (EV_A_ fd, anfd->events, events);
		479	anfd->events = events;
		480	}
		481
		482	fdchangecnt = 0;
		483	}
		484
		485	void inline_size
		486	fd_change (EV_P_ int fd)
		487	{
		488	if (expect_false (anfds [fd].reify))
		489	return;
		490
		491	anfds [fd].reify = 1;
		492
		493	++fdchangecnt;
		494	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		495	fdchanges [fdchangecnt - 1] = fd;
		496	}
		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
		520	/* called on EBADF to verify fds */
		521	static void noinline
		522	fd_ebadf (EV_P)
		523	{
		524	int fd;
		525
		526	for (fd = 0; fd < anfdmax; ++fd)
		527	if (anfds [fd].events)
		528	if (!fd_valid (fd) == -1 && errno == EBADF)
		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)
		540	{
		541	fd_kill (EV_A_ fd);
		542	return;
		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	}
		559	}
		560
		561	/*****************************************************************************/
		562
		563	void inline_speed
		564	upheap (WT *heap, int k)
		565	{
		566	WT w = heap [k];
		567
		568	while (k && heap [k >> 1]->at > w->at)
		569	{
		570	heap [k] = heap [k >> 1];
		571	((W)heap [k])->active = k + 1;
		572	k >>= 1;
		573	}
		574
		575	heap [k] = w;
		576	((W)heap [k])->active = k + 1;
		577
		578	}
		579
		580	void inline_speed
		581	downheap (WT *heap, int N, int k)
		582	{
		583	WT w = heap [k];
		584
		585	while (k < (N >> 1))
		586	{
		587	int j = k << 1;
		588
		589	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		590	++j;
		591
		592	if (w->at <= heap [j]->at)
		593	break;
		594
		595	heap [k] = heap [j];
		596	((W)heap [k])->active = k + 1;
		597	k = j;
		598	}
		599
		600	heap [k] = w;
		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);
		609	}
		610
		611	/*****************************************************************************/
		612
123	typedef struct	613	typedef struct
124	{	614	{
125	struct ev_io *head;	615	WL head;
126	unsigned char wev, rev; /* want, received event set */
127	} ANFD;
128
129	static ANFD *anfds;
130	static int anfdmax;
131
132	static int *fdchanges;
133	static int fdchangemax, fdchangecnt;
134
135	static void
136	anfds_init (ANFD *base, int count)
137	{
138	while (count--)
139	{
140	base->head = 0;
141	base->wev = base->rev = EV_NONE;
142	++base;
143	}
144	}
145
146	typedef struct
147	{
148	W w;
149	int events;
150	} ANPENDING;
151
152	static ANPENDING *pendings;
153	static int pendingmax, pendingcnt;
154
155	static void
156	event (W w, int events)
157	{
158	if (w->active)
159	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;
164	}
165	}
166
167	static void
168	fd_event (int fd, int events)
169	{
170	ANFD *anfd = anfds + fd;
171	struct ev_io *w;
172
173	for (w = anfd->head; w; w = w->next)
174	{
175	int ev = w->events & events;
176
177	if (ev)
178	event ((W)w, ev);
179	}
180	}
181
182	static void
183	queue_events (W *events, int eventcnt, int type)
184	{
185	int i;
186
187	for (i = 0; i < eventcnt; ++i)
188	event (events [i], type);
189	}
190
191	/* called on EBADF to verify fds */
192	static void
193	fd_recheck ()
194	{
195	int fd;
196
197	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
200	while (anfds [fd].head)
201	evio_stop (anfds [fd].head);
202	}
203
204	/*****************************************************************************/
205
206	static struct ev_timer **timers;
207	static int timermax, timercnt;
208
209	static struct ev_periodic **periodics;
210	static int periodicmax, periodiccnt;
211
212	static void
213	upheap (WT *timers, int k)
214	{
215	WT w = timers [k];
216
217	while (k && timers [k >> 1]->at > w->at)
218	{
219	timers [k] = timers [k >> 1];
220	timers [k]->active = k + 1;
221	k >>= 1;
222	}
223
224	timers [k] = w;
225	timers [k]->active = k + 1;
226
227	}
228
229	static void
230	downheap (WT *timers, int N, int k)
231	{
232	WT w = timers [k];
233
234	while (k < (N >> 1))
235	{
236	int j = k << 1;
237
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
239	++j;
240
241	if (w->at <= timers [j]->at)
242	break;
243
244	timers [k] = timers [j];
245	timers [k]->active = k + 1;
246	k = j;
247	}
248
249	timers [k] = w;
250	timers [k]->active = k + 1;
251	}
252
253	/*****************************************************************************/
254
255	typedef struct
256	{
257	struct ev_signal *head;
258	sig_atomic_t gotsig;	616	sig_atomic_t volatile gotsig;
259	} ANSIG;	617	} ANSIG;
260		618
261	static ANSIG *signals;	619	static ANSIG *signals;
262	static int signalmax;	620	static int signalmax;
263		621
264	static int sigpipe [2];	622	static int sigpipe [2];
265	static sig_atomic_t gotsig;	623	static sig_atomic_t volatile gotsig;
266	static struct ev_io sigev;	624	static ev_io sigev;
267		625
268	static void	626	void inline_size
269	signals_init (ANSIG *base, int count)	627	signals_init (ANSIG *base, int count)
270	{	628	{
271	while (count--)	629	while (count--)
272	{	630	{
273	base->head = 0;	631	base->head = 0;
274	base->gotsig = 0;	632	base->gotsig = 0;
		633
275	++base;	634	++base;
276	}	635	}
277	}	636	}
278		637
279	static void	638	static void
280	sighandler (int signum)	639	sighandler (int signum)
281	{	640	{
		641	#if _WIN32
		642	signal (signum, sighandler);
		643	#endif
		644
282	signals [signum - 1].gotsig = 1;	645	signals [signum - 1].gotsig = 1;
283		646
284	if (!gotsig)	647	if (!gotsig)
285	{	648	{
		649	int old_errno = errno;
286	gotsig = 1;	650	gotsig = 1;
287	write (sigpipe [1], &gotsig, 1);	651	write (sigpipe [1], &signum, 1);
		652	errno = old_errno;
288	}	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);
289	}	674	}
290		675
291	static void	676	static void
292	sigcb (struct ev_io *iow, int revents)	677	sigcb (EV_P_ ev_io *iow, int revents)
293	{	678	{
294	struct ev_signal *w;
295	int sig;	679	int signum;
296		680
		681	read (sigpipe [0], &revents, 1);
297	gotsig = 0;	682	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299		683
300	for (sig = signalmax; sig--; )	684	for (signum = signalmax; signum--; )
301	if (signals [sig].gotsig)	685	if (signals [signum].gotsig)
		686	ev_feed_signal_event (EV_A_ signum + 1);
		687	}
		688
		689	void inline_size
		690	fd_intern (int fd)
		691	{
		692	#ifdef _WIN32
		693	int arg = 1;
		694	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		695	#else
		696	fcntl (fd, F_SETFD, FD_CLOEXEC);
		697	fcntl (fd, F_SETFL, O_NONBLOCK);
		698	#endif
		699	}
		700
		701	static void noinline
		702	siginit (EV_P)
		703	{
		704	fd_intern (sigpipe [0]);
		705	fd_intern (sigpipe [1]);
		706
		707	ev_io_set (&sigev, sigpipe [0], EV_READ);
		708	ev_io_start (EV_A_ &sigev);
		709	ev_unref (EV_A); /* child watcher should not keep loop alive */
		710	}
		711
		712	/*****************************************************************************/
		713
		714	static ev_child *childs [PID_HASHSIZE];
		715
		716	#ifndef _WIN32
		717
		718	static ev_signal childev;
		719
		720	void inline_speed
		721	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		722	{
		723	ev_child *w;
		724
		725	for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		726	if (w->pid == pid || !w->pid)
302	{	727	{
303	signals [sig].gotsig = 0;	728	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
304		729	w->rpid = pid;
305	for (w = signals [sig].head; w; w = w->next)	730	w->rstatus = status;
306	event ((W)w, EV_SIGNAL);	731	ev_feed_event (EV_A_ (W)w, EV_CHILD);
307	}	732	}
308	}	733	}
309		734
		735	#ifndef WCONTINUED
		736	# define WCONTINUED 0
		737	#endif
		738
310	static void	739	static void
311	siginit (void)	740	childcb (EV_P_ ev_signal *sw, int revents)
312	{	741	{
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	742	int pid, status;
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315		743
316	/* rather than sort out wether we really need nb, set it */	744	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	745	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	746	if (!WCONTINUED
		747	|| errno != EINVAL
		748	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		749	return;
319		750
320	evio_set (&sigev, sigpipe [0], EV_READ);	751	/* make sure we are called again until all childs have been reaped */
321	evio_start (&sigev);	752	/* we need to do it this way so that the callback gets called before we continue */
		753	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		754
		755	child_reap (EV_A_ sw, pid, pid, status);
		756	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
322	}	757	}
		758
		759	#endif
323		760
324	/*****************************************************************************/	761	/*****************************************************************************/
325		762
326	static struct ev_idle **idles;	763	#if EV_USE_PORT
327	static int idlemax, idlecnt;	764	# include "ev_port.c"
		765	#endif
		766	#if EV_USE_KQUEUE
		767	# include "ev_kqueue.c"
		768	#endif
		769	#if EV_USE_EPOLL
		770	# include "ev_epoll.c"
		771	#endif
		772	#if EV_USE_POLL
		773	# include "ev_poll.c"
		774	#endif
		775	#if EV_USE_SELECT
		776	# include "ev_select.c"
		777	#endif
328		778
329	static struct ev_prepare **prepares;	779	int
330	static int preparemax, preparecnt;	780	ev_version_major (void)
		781	{
		782	return EV_VERSION_MAJOR;
		783	}
331		784
332	static struct ev_check **checks;	785	int
333	static int checkmax, checkcnt;	786	ev_version_minor (void)
		787	{
		788	return EV_VERSION_MINOR;
		789	}
		790
		791	/* return true if we are running with elevated privileges and should ignore env variables */
		792	int inline_size
		793	enable_secure (void)
		794	{
		795	#ifdef _WIN32
		796	return 0;
		797	#else
		798	return getuid () != geteuid ()
		799	|| getgid () != getegid ();
		800	#endif
		801	}
		802
		803	unsigned int
		804	ev_supported_backends (void)
		805	{
		806	unsigned int flags = 0;
		807
		808	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		809	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		810	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		811	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		812	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		813
		814	return flags;
		815	}
		816
		817	unsigned int
		818	ev_recommended_backends (void)
		819	{
		820	unsigned int flags = ev_supported_backends ();
		821
		822	#ifndef __NetBSD__
		823	/* kqueue is borked on everything but netbsd apparently */
		824	/* it usually doesn't work correctly on anything but sockets and pipes */
		825	flags &= ~EVBACKEND_KQUEUE;
		826	#endif
		827	#ifdef __APPLE__
		828	// flags &= ~EVBACKEND_KQUEUE; for documentation
		829	flags &= ~EVBACKEND_POLL;
		830	#endif
		831
		832	return flags;
		833	}
		834
		835	unsigned int
		836	ev_embeddable_backends (void)
		837	{
		838	return EVBACKEND_EPOLL
		839	| EVBACKEND_KQUEUE
		840	| EVBACKEND_PORT;
		841	}
		842
		843	unsigned int
		844	ev_backend (EV_P)
		845	{
		846	return backend;
		847	}
		848
		849	static void
		850	loop_init (EV_P_ unsigned int flags)
		851	{
		852	if (!backend)
		853	{
		854	#if EV_USE_MONOTONIC
		855	{
		856	struct timespec ts;
		857	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		858	have_monotonic = 1;
		859	}
		860	#endif
		861
		862	ev_rt_now = ev_time ();
		863	mn_now = get_clock ();
		864	now_floor = mn_now;
		865	rtmn_diff = ev_rt_now - mn_now;
		866
		867	if (!(flags & EVFLAG_NOENV)
		868	&& !enable_secure ()
		869	&& getenv ("LIBEV_FLAGS"))
		870	flags = atoi (getenv ("LIBEV_FLAGS"));
		871
		872	if (!(flags & 0x0000ffffUL))
		873	flags |= ev_recommended_backends ();
		874
		875	backend = 0;
		876	#if EV_USE_PORT
		877	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		878	#endif
		879	#if EV_USE_KQUEUE
		880	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		881	#endif
		882	#if EV_USE_EPOLL
		883	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		884	#endif
		885	#if EV_USE_POLL
		886	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		887	#endif
		888	#if EV_USE_SELECT
		889	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		890	#endif
		891
		892	ev_init (&sigev, sigcb);
		893	ev_set_priority (&sigev, EV_MAXPRI);
		894	}
		895	}
		896
		897	static void
		898	loop_destroy (EV_P)
		899	{
		900	int i;
		901
		902	#if EV_USE_PORT
		903	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		904	#endif
		905	#if EV_USE_KQUEUE
		906	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		907	#endif
		908	#if EV_USE_EPOLL
		909	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		910	#endif
		911	#if EV_USE_POLL
		912	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		913	#endif
		914	#if EV_USE_SELECT
		915	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		916	#endif
		917
		918	for (i = NUMPRI; i--; )
		919	array_free (pending, [i]);
		920
		921	/* have to use the microsoft-never-gets-it-right macro */
		922	array_free (fdchange, EMPTY0);
		923	array_free (timer, EMPTY0);
		924	#if EV_PERIODIC_ENABLE
		925	array_free (periodic, EMPTY0);
		926	#endif
		927	array_free (idle, EMPTY0);
		928	array_free (prepare, EMPTY0);
		929	array_free (check, EMPTY0);
		930
		931	backend = 0;
		932	}
		933
		934	static void
		935	loop_fork (EV_P)
		936	{
		937	#if EV_USE_PORT
		938	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		939	#endif
		940	#if EV_USE_KQUEUE
		941	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		942	#endif
		943	#if EV_USE_EPOLL
		944	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		945	#endif
		946
		947	if (ev_is_active (&sigev))
		948	{
		949	/* default loop */
		950
		951	ev_ref (EV_A);
		952	ev_io_stop (EV_A_ &sigev);
		953	close (sigpipe [0]);
		954	close (sigpipe [1]);
		955
		956	while (pipe (sigpipe))
		957	syserr ("(libev) error creating pipe");
		958
		959	siginit (EV_A);
		960	}
		961
		962	postfork = 0;
		963	}
		964
		965	#if EV_MULTIPLICITY
		966	struct ev_loop *
		967	ev_loop_new (unsigned int flags)
		968	{
		969	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		970
		971	memset (loop, 0, sizeof (struct ev_loop));
		972
		973	loop_init (EV_A_ flags);
		974
		975	if (ev_backend (EV_A))
		976	return loop;
		977
		978	return 0;
		979	}
		980
		981	void
		982	ev_loop_destroy (EV_P)
		983	{
		984	loop_destroy (EV_A);
		985	ev_free (loop);
		986	}
		987
		988	void
		989	ev_loop_fork (EV_P)
		990	{
		991	postfork = 1;
		992	}
		993
		994	#endif
		995
		996	#if EV_MULTIPLICITY
		997	struct ev_loop *
		998	ev_default_loop_init (unsigned int flags)
		999	#else
		1000	int
		1001	ev_default_loop (unsigned int flags)
		1002	#endif
		1003	{
		1004	if (sigpipe [0] == sigpipe [1])
		1005	if (pipe (sigpipe))
		1006	return 0;
		1007
		1008	if (!ev_default_loop_ptr)
		1009	{
		1010	#if EV_MULTIPLICITY
		1011	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1012	#else
		1013	ev_default_loop_ptr = 1;
		1014	#endif
		1015
		1016	loop_init (EV_A_ flags);
		1017
		1018	if (ev_backend (EV_A))
		1019	{
		1020	siginit (EV_A);
		1021
		1022	#ifndef _WIN32
		1023	ev_signal_init (&childev, childcb, SIGCHLD);
		1024	ev_set_priority (&childev, EV_MAXPRI);
		1025	ev_signal_start (EV_A_ &childev);
		1026	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1027	#endif
		1028	}
		1029	else
		1030	ev_default_loop_ptr = 0;
		1031	}
		1032
		1033	return ev_default_loop_ptr;
		1034	}
		1035
		1036	void
		1037	ev_default_destroy (void)
		1038	{
		1039	#if EV_MULTIPLICITY
		1040	struct ev_loop *loop = ev_default_loop_ptr;
		1041	#endif
		1042
		1043	#ifndef _WIN32
		1044	ev_ref (EV_A); /* child watcher */
		1045	ev_signal_stop (EV_A_ &childev);
		1046	#endif
		1047
		1048	ev_ref (EV_A); /* signal watcher */
		1049	ev_io_stop (EV_A_ &sigev);
		1050
		1051	close (sigpipe [0]); sigpipe [0] = 0;
		1052	close (sigpipe [1]); sigpipe [1] = 0;
		1053
		1054	loop_destroy (EV_A);
		1055	}
		1056
		1057	void
		1058	ev_default_fork (void)
		1059	{
		1060	#if EV_MULTIPLICITY
		1061	struct ev_loop *loop = ev_default_loop_ptr;
		1062	#endif
		1063
		1064	if (backend)
		1065	postfork = 1;
		1066	}
334		1067
335	/*****************************************************************************/	1068	/*****************************************************************************/
336		1069
337	#if HAVE_EPOLL	1070	int inline_size
338	# include "ev_epoll.c"	1071	any_pending (EV_P)
339	#endif
340	#if HAVE_SELECT
341	# include "ev_select.c"
342	#endif
343
344	int ev_init (int flags)
345	{	1072	{
346	#if HAVE_MONOTONIC	1073	int pri;
347	{
348	struct timespec ts;
349	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
350	have_monotonic = 1;
351	}
352	#endif
353		1074
354	ev_now = ev_time ();	1075	for (pri = NUMPRI; pri--; )
355	now = get_clock ();	1076	if (pendingcnt [pri])
356	diff = ev_now - now;	1077	return 1;
357		1078
358	if (pipe (sigpipe))
359	return 0;	1079	return 0;
360
361	ev_method = EVMETHOD_NONE;
362	#if HAVE_EPOLL
363	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
364	#endif
365	#if HAVE_SELECT
366	if (ev_method == EVMETHOD_NONE) select_init (flags);
367	#endif
368
369	if (ev_method)
370	{
371	evw_init (&sigev, sigcb);
372	siginit ();
373	}
374
375	return ev_method;
376	}	1080	}
377		1081
378	/*****************************************************************************/	1082	void inline_speed
379		1083	call_pending (EV_P)
380	void ev_prefork (void)
381	{	1084	{
382	/* nop */
383	}
384
385	void ev_postfork_parent (void)
386	{
387	/* nop */
388	}
389
390	void ev_postfork_child (void)
391	{
392	#if HAVE_EPOLL
393	if (ev_method == EVMETHOD_EPOLL)
394	epoll_postfork_child ();
395	#endif
396
397	evio_stop (&sigev);
398	close (sigpipe [0]);
399	close (sigpipe [1]);
400	pipe (sigpipe);
401	siginit ();
402	}
403
404	/*****************************************************************************/
405
406	static void
407	fd_reify (void)
408	{
409	int i;	1085	int pri;
410		1086
411	for (i = 0; i < fdchangecnt; ++i)	1087	for (pri = NUMPRI; pri--; )
		1088	while (pendingcnt [pri])
412	{	1089	{
413	int fd = fdchanges [i];	1090	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
414	ANFD *anfd = anfds + fd;
415	struct ev_io *w;
416		1091
417	int wev = 0;	1092	if (expect_true (p->w))
418
419	for (w = anfd->head; w; w = w->next)
420	wev |= w->events;
421
422	if (anfd->wev != wev)
423	{	1093	{
424	method_modify (fd, anfd->wev, wev);	1094	assert (("non-pending watcher on pending list", p->w->pending));
425	anfd->wev = wev;
426	}
427	}
428		1095
429	fdchangecnt = 0;
430	}
431
432	static void
433	call_pending ()
434	{
435	while (pendingcnt)
436	{
437	ANPENDING *p = pendings + --pendingcnt;
438
439	if (p->w)
440	{
441	p->w->pending = 0;	1096	p->w->pending = 0;
442	p->w->cb (p->w, p->events);	1097	EV_CB_INVOKE (p->w, p->events);
443	}	1098	}
444	}	1099	}
445	}	1100	}
446		1101
447	static void	1102	void inline_size
448	timers_reify ()	1103	timers_reify (EV_P)
449	{	1104	{
450	while (timercnt && timers [0]->at <= now)	1105	while (timercnt && ((WT)timers [0])->at <= mn_now)
451	{	1106	{
452	struct ev_timer *w = timers [0];	1107	ev_timer *w = timers [0];
453		1108
454	event ((W)w, EV_TIMEOUT);	1109	assert (("inactive timer on timer heap detected", ev_is_active (w)));
455		1110
456	/* first reschedule or stop timer */	1111	/* first reschedule or stop timer */
457	if (w->repeat)	1112	if (w->repeat)
458	{	1113	{
		1114	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1115
459	w->at = now + w->repeat;	1116	((WT)w)->at += w->repeat;
460	assert (("timer timeout in the past, negative repeat?", w->at > now));	1117	if (((WT)w)->at < mn_now)
		1118	((WT)w)->at = mn_now;
		1119
461	downheap ((WT *)timers, timercnt, 0);	1120	downheap ((WT *)timers, timercnt, 0);
462	}	1121	}
463	else	1122	else
464	evtimer_stop (w); /* nonrepeating: stop timer */	1123	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
465	}
466	}
467		1124
468	static void	1125	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1126	}
		1127	}
		1128
		1129	#if EV_PERIODIC_ENABLE
		1130	void inline_size
469	periodics_reify ()	1131	periodics_reify (EV_P)
470	{	1132	{
471	while (periodiccnt && periodics [0]->at <= ev_now)	1133	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
472	{	1134	{
473	struct ev_periodic *w = periodics [0];	1135	ev_periodic *w = periodics [0];
		1136
		1137	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
474		1138
475	/* first reschedule or stop timer */	1139	/* first reschedule or stop timer */
476	if (w->interval)	1140	if (w->reschedule_cb)
477	{	1141	{
		1142	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1143	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1144	downheap ((WT *)periodics, periodiccnt, 0);
		1145	}
		1146	else if (w->interval)
		1147	{
478	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1148	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
479	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1149	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
480	downheap ((WT *)periodics, periodiccnt, 0);	1150	downheap ((WT *)periodics, periodiccnt, 0);
481	}	1151	}
482	else	1152	else
483	evperiodic_stop (w); /* nonrepeating: stop timer */	1153	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
484		1154
485	event ((W)w, EV_TIMEOUT);	1155	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
486	}	1156	}
487	}	1157	}
488		1158
489	static void	1159	static void noinline
490	periodics_reschedule (ev_tstamp diff)	1160	periodics_reschedule (EV_P)
491	{	1161	{
492	int i;	1162	int i;
493		1163
494	/* adjust periodics after time jump */	1164	/* adjust periodics after time jump */
495	for (i = 0; i < periodiccnt; ++i)	1165	for (i = 0; i < periodiccnt; ++i)
496	{	1166	{
497	struct ev_periodic *w = periodics [i];	1167	ev_periodic *w = periodics [i];
498		1168
		1169	if (w->reschedule_cb)
		1170	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
499	if (w->interval)	1171	else if (w->interval)
		1172	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1173	}
		1174
		1175	/* now rebuild the heap */
		1176	for (i = periodiccnt >> 1; i--; )
		1177	downheap ((WT *)periodics, periodiccnt, i);
		1178	}
		1179	#endif
		1180
		1181	int inline_size
		1182	time_update_monotonic (EV_P)
		1183	{
		1184	mn_now = get_clock ();
		1185
		1186	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1187	{
		1188	ev_rt_now = rtmn_diff + mn_now;
		1189	return 0;
		1190	}
		1191	else
		1192	{
		1193	now_floor = mn_now;
		1194	ev_rt_now = ev_time ();
		1195	return 1;
		1196	}
		1197	}
		1198
		1199	void inline_size
		1200	time_update (EV_P)
		1201	{
		1202	int i;
		1203
		1204	#if EV_USE_MONOTONIC
		1205	if (expect_true (have_monotonic))
		1206	{
		1207	if (time_update_monotonic (EV_A))
500	{	1208	{
501	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1209	ev_tstamp odiff = rtmn_diff;
502		1210
503	if (fabs (diff) >= 1e-4)	1211	/* loop a few times, before making important decisions.
		1212	* on the choice of "4": one iteration isn't enough,
		1213	* in case we get preempted during the calls to
		1214	* ev_time and get_clock. a second call is almost guarenteed
		1215	* to succeed in that case, though. and looping a few more times
		1216	* doesn't hurt either as we only do this on time-jumps or
		1217	* in the unlikely event of getting preempted here.
		1218	*/
		1219	for (i = 4; --i; )
504	{	1220	{
505	evperiodic_stop (w);	1221	rtmn_diff = ev_rt_now - mn_now;
506	evperiodic_start (w);
507		1222
508	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1223	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1224	return; /* all is well */
		1225
		1226	ev_rt_now = ev_time ();
		1227	mn_now = get_clock ();
		1228	now_floor = mn_now;
509	}	1229	}
		1230
		1231	# if EV_PERIODIC_ENABLE
		1232	periodics_reschedule (EV_A);
		1233	# endif
		1234	/* no timer adjustment, as the monotonic clock doesn't jump */
		1235	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
510	}	1236	}
511	}	1237	}
512	}	1238	else
513		1239	#endif
514	static void	1240	{
515	time_update ()
516	{
517	int i;
518
519	ev_now = ev_time ();	1241	ev_rt_now = ev_time ();
520		1242
521	if (have_monotonic)	1243	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
522	{
523	ev_tstamp odiff = diff;
524
525	for (i = 4; --i; ) /* loop a few times, before making important decisions */
526	{	1244	{
527	now = get_clock ();	1245	#if EV_PERIODIC_ENABLE
528	diff = ev_now - now;
529
530	if (fabs (odiff - diff) < MIN_TIMEJUMP)
531	return; /* all is well */
532
533	ev_now = ev_time ();
534	}
535
536	periodics_reschedule (diff - odiff);
537	/* no timer adjustment, as the monotonic clock doesn't jump */
538	}
539	else
540	{
541	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
542	{
543	periodics_reschedule (ev_now - now);	1246	periodics_reschedule (EV_A);
		1247	#endif
544		1248
545	/* adjust timers. this is easy, as the offset is the same for all */	1249	/* adjust timers. this is easy, as the offset is the same for all */
546	for (i = 0; i < timercnt; ++i)	1250	for (i = 0; i < timercnt; ++i)
547	timers [i]->at += diff;	1251	((WT)timers [i])->at += ev_rt_now - mn_now;
548	}	1252	}
549		1253
550	now = ev_now;	1254	mn_now = ev_rt_now;
551	}
552	}
553
554	int ev_loop_done;
555
556	void ev_loop (int flags)
557	{
558	double block;
559	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
560
561	do
562	{	1255	}
		1256	}
		1257
		1258	void
		1259	ev_ref (EV_P)
		1260	{
		1261	++activecnt;
		1262	}
		1263
		1264	void
		1265	ev_unref (EV_P)
		1266	{
		1267	--activecnt;
		1268	}
		1269
		1270	static int loop_done;
		1271
		1272	void
		1273	ev_loop (EV_P_ int flags)
		1274	{
		1275	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1276	? EVUNLOOP_ONE
		1277	: EVUNLOOP_CANCEL;
		1278
		1279	while (activecnt)
		1280	{
		1281	/* we might have forked, so reify kernel state if necessary */
		1282	#if EV_FORK_ENABLE
		1283	if (expect_false (postfork))
		1284	if (forkcnt)
		1285	{
		1286	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1287	call_pending (EV_A);
		1288	}
		1289	#endif
		1290
563	/* queue check watchers (and execute them) */	1291	/* queue check watchers (and execute them) */
564	if (checkcnt)	1292	if (expect_false (preparecnt))
565	{	1293	{
566	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1294	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
567	call_pending ();	1295	call_pending (EV_A);
568	}	1296	}
569		1297
		1298	/* we might have forked, so reify kernel state if necessary */
		1299	if (expect_false (postfork))
		1300	loop_fork (EV_A);
		1301
570	/* update fd-related kernel structures */	1302	/* update fd-related kernel structures */
571	fd_reify ();	1303	fd_reify (EV_A);
572		1304
573	/* calculate blocking time */	1305	/* calculate blocking time */
		1306	{
		1307	double block;
574		1308
575	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */
576	ev_now = ev_time ();
577
578	if (flags & EVLOOP_NONBLOCK || idlecnt)	1309	if (flags & EVLOOP_NONBLOCK || idlecnt)
579	block = 0.;	1310	block = 0.; /* do not block at all */
580	else	1311	else
581	{	1312	{
		1313	/* update time to cancel out callback processing overhead */
		1314	#if EV_USE_MONOTONIC
		1315	if (expect_true (have_monotonic))
		1316	time_update_monotonic (EV_A);
		1317	else
		1318	#endif
		1319	{
		1320	ev_rt_now = ev_time ();
		1321	mn_now = ev_rt_now;
		1322	}
		1323
582	block = MAX_BLOCKTIME;	1324	block = MAX_BLOCKTIME;
583		1325
584	if (timercnt)	1326	if (timercnt)
585	{	1327	{
586	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1328	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
587	if (block > to) block = to;	1329	if (block > to) block = to;
588	}	1330	}
589		1331
		1332	#if EV_PERIODIC_ENABLE
590	if (periodiccnt)	1333	if (periodiccnt)
591	{	1334	{
592	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1335	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
593	if (block > to) block = to;	1336	if (block > to) block = to;
594	}	1337	}
		1338	#endif
595		1339
596	if (block < 0.) block = 0.;	1340	if (expect_false (block < 0.)) block = 0.;
597	}	1341	}
598		1342
599	method_poll (block);	1343	backend_poll (EV_A_ block);
		1344	}
600		1345
601	/* update ev_now, do magic */	1346	/* update ev_rt_now, do magic */
602	time_update ();	1347	time_update (EV_A);
603		1348
604	/* queue pending timers and reschedule them */	1349	/* queue pending timers and reschedule them */
605	timers_reify (); /* relative timers called last */	1350	timers_reify (EV_A); /* relative timers called last */
		1351	#if EV_PERIODIC_ENABLE
606	periodics_reify (); /* absolute timers called first */	1352	periodics_reify (EV_A); /* absolute timers called first */
		1353	#endif
607		1354
608	/* queue idle watchers unless io or timers are pending */	1355	/* queue idle watchers unless other events are pending */
609	if (!pendingcnt)	1356	if (idlecnt && !any_pending (EV_A))
610	queue_events ((W *)idles, idlecnt, EV_IDLE);	1357	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
611		1358
612	/* queue check watchers, to be executed first */	1359	/* queue check watchers, to be executed first */
613	if (checkcnt)	1360	if (expect_false (checkcnt))
614	queue_events ((W *)checks, checkcnt, EV_CHECK);	1361	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
615		1362
616	call_pending ();	1363	call_pending (EV_A);
617	}
618	while (!ev_loop_done);
619		1364
620	if (ev_loop_done != 2)	1365	if (expect_false (loop_done))
		1366	break;
		1367	}
		1368
		1369	if (loop_done == EVUNLOOP_ONE)
		1370	loop_done = EVUNLOOP_CANCEL;
		1371	}
		1372
		1373	void
		1374	ev_unloop (EV_P_ int how)
		1375	{
621	ev_loop_done = 0;	1376	loop_done = how;
622	}	1377	}
623		1378
624	/*****************************************************************************/	1379	/*****************************************************************************/
625		1380
626	static void	1381	void inline_size
627	wlist_add (WL *head, WL elem)	1382	wlist_add (WL *head, WL elem)
628	{	1383	{
629	elem->next = *head;	1384	elem->next = *head;
630	*head = elem;	1385	*head = elem;
631	}	1386	}
632		1387
633	static void	1388	void inline_size
634	wlist_del (WL *head, WL elem)	1389	wlist_del (WL *head, WL elem)
635	{	1390	{
636	while (*head)	1391	while (*head)
637	{	1392	{
638	if (*head == elem)	1393	if (*head == elem)
…		…
643		1398
644	head = &(*head)->next;	1399	head = &(*head)->next;
645	}	1400	}
646	}	1401	}
647		1402
648	static void	1403	void inline_speed
649	ev_clear (W w)	1404	ev_clear_pending (EV_P_ W w)
650	{	1405	{
651	if (w->pending)	1406	if (w->pending)
652	{	1407	{
653	pendings [w->pending - 1].w = 0;	1408	pendings [ABSPRI (w)][w->pending - 1].w = 0;
654	w->pending = 0;	1409	w->pending = 0;
655	}	1410	}
656	}	1411	}
657		1412
658	static void	1413	void inline_speed
659	ev_start (W w, int active)	1414	ev_start (EV_P_ W w, int active)
660	{	1415	{
		1416	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1417	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1418
661	w->active = active;	1419	w->active = active;
		1420	ev_ref (EV_A);
662	}	1421	}
663		1422
664	static void	1423	void inline_size
665	ev_stop (W w)	1424	ev_stop (EV_P_ W w)
666	{	1425	{
		1426	ev_unref (EV_A);
667	w->active = 0;	1427	w->active = 0;
668	}	1428	}
669		1429
670	/*****************************************************************************/	1430	/*****************************************************************************/
671		1431
672	void	1432	void
673	evio_start (struct ev_io *w)	1433	ev_io_start (EV_P_ ev_io *w)
674	{	1434	{
675	if (ev_is_active (w))
676	return;
677
678	int fd = w->fd;	1435	int fd = w->fd;
679		1436
		1437	if (expect_false (ev_is_active (w)))
		1438	return;
		1439
		1440	assert (("ev_io_start called with negative fd", fd >= 0));
		1441
680	ev_start ((W)w, 1);	1442	ev_start (EV_A_ (W)w, 1);
681	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1443	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
682	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1444	wlist_add ((WL *)&anfds[fd].head, (WL)w);
683		1445
684	++fdchangecnt;	1446	fd_change (EV_A_ fd);
685	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
686	fdchanges [fdchangecnt - 1] = fd;
687	}	1447	}
688		1448
689	void	1449	void
690	evio_stop (struct ev_io *w)	1450	ev_io_stop (EV_P_ ev_io *w)
691	{	1451	{
692	ev_clear ((W)w);	1452	ev_clear_pending (EV_A_ (W)w);
693	if (!ev_is_active (w))	1453	if (expect_false (!ev_is_active (w)))
694	return;	1454	return;
		1455
		1456	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
695		1457
696	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1458	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
697	ev_stop ((W)w);	1459	ev_stop (EV_A_ (W)w);
698		1460
699	++fdchangecnt;	1461	fd_change (EV_A_ w->fd);
700	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
701	fdchanges [fdchangecnt - 1] = w->fd;
702	}	1462	}
703		1463
704	void	1464	void
705	evtimer_start (struct ev_timer *w)	1465	ev_timer_start (EV_P_ ev_timer *w)
706	{	1466	{
707	if (ev_is_active (w))	1467	if (expect_false (ev_is_active (w)))
708	return;	1468	return;
709		1469
710	w->at += now;	1470	((WT)w)->at += mn_now;
711		1471
712	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1472	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
713		1473
714	ev_start ((W)w, ++timercnt);	1474	ev_start (EV_A_ (W)w, ++timercnt);
715	array_needsize (timers, timermax, timercnt, );	1475	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
716	timers [timercnt - 1] = w;	1476	timers [timercnt - 1] = w;
717	upheap ((WT *)timers, timercnt - 1);	1477	upheap ((WT *)timers, timercnt - 1);
718	}
719		1478
		1479	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1480	}
		1481
720	void	1482	void
721	evtimer_stop (struct ev_timer *w)	1483	ev_timer_stop (EV_P_ ev_timer *w)
722	{	1484	{
723	ev_clear ((W)w);	1485	ev_clear_pending (EV_A_ (W)w);
724	if (!ev_is_active (w))	1486	if (expect_false (!ev_is_active (w)))
725	return;	1487	return;
726		1488
		1489	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1490
727	if (w->active < timercnt--)	1491	if (expect_true (((W)w)->active < timercnt--))
728	{	1492	{
729	timers [w->active - 1] = timers [timercnt];	1493	timers [((W)w)->active - 1] = timers [timercnt];
730	downheap ((WT *)timers, timercnt, w->active - 1);	1494	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
731	}	1495	}
732		1496
733	w->at = w->repeat;	1497	((WT)w)->at -= mn_now;
734		1498
735	ev_stop ((W)w);	1499	ev_stop (EV_A_ (W)w);
736	}	1500	}
737		1501
738	void	1502	void
739	evtimer_again (struct ev_timer *w)	1503	ev_timer_again (EV_P_ ev_timer *w)
740	{	1504	{
741	if (ev_is_active (w))	1505	if (ev_is_active (w))
742	{	1506	{
743	if (w->repeat)	1507	if (w->repeat)
744	{	1508	{
745	w->at = now + w->repeat;	1509	((WT)w)->at = mn_now + w->repeat;
746	downheap ((WT *)timers, timercnt, w->active - 1);	1510	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
747	}	1511	}
748	else	1512	else
749	evtimer_stop (w);	1513	ev_timer_stop (EV_A_ w);
750	}	1514	}
751	else if (w->repeat)	1515	else if (w->repeat)
		1516	{
		1517	w->at = w->repeat;
752	evtimer_start (w);	1518	ev_timer_start (EV_A_ w);
		1519	}
753	}	1520	}
754		1521
		1522	#if EV_PERIODIC_ENABLE
755	void	1523	void
756	evperiodic_start (struct ev_periodic *w)	1524	ev_periodic_start (EV_P_ ev_periodic *w)
757	{	1525	{
758	if (ev_is_active (w))	1526	if (expect_false (ev_is_active (w)))
759	return;	1527	return;
760		1528
761	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1529	if (w->reschedule_cb)
762		1530	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1531	else if (w->interval)
		1532	{
		1533	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
763	/* this formula differs from the one in periodic_reify because we do not always round up */	1534	/* this formula differs from the one in periodic_reify because we do not always round up */
764	if (w->interval)
765	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1535	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1536	}
766		1537
767	ev_start ((W)w, ++periodiccnt);	1538	ev_start (EV_A_ (W)w, ++periodiccnt);
768	array_needsize (periodics, periodicmax, periodiccnt, );	1539	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
769	periodics [periodiccnt - 1] = w;	1540	periodics [periodiccnt - 1] = w;
770	upheap ((WT *)periodics, periodiccnt - 1);	1541	upheap ((WT *)periodics, periodiccnt - 1);
771	}
772		1542
		1543	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1544	}
		1545
773	void	1546	void
774	evperiodic_stop (struct ev_periodic *w)	1547	ev_periodic_stop (EV_P_ ev_periodic *w)
775	{	1548	{
776	ev_clear ((W)w);	1549	ev_clear_pending (EV_A_ (W)w);
777	if (!ev_is_active (w))	1550	if (expect_false (!ev_is_active (w)))
778	return;	1551	return;
779		1552
		1553	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1554
780	if (w->active < periodiccnt--)	1555	if (expect_true (((W)w)->active < periodiccnt--))
781	{	1556	{
782	periodics [w->active - 1] = periodics [periodiccnt];	1557	periodics [((W)w)->active - 1] = periodics [periodiccnt];
783	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1558	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
784	}	1559	}
785		1560
786	ev_stop ((W)w);	1561	ev_stop (EV_A_ (W)w);
787	}	1562	}
788		1563
789	void	1564	void
		1565	ev_periodic_again (EV_P_ ev_periodic *w)
		1566	{
		1567	/* TODO: use adjustheap and recalculation */
		1568	ev_periodic_stop (EV_A_ w);
		1569	ev_periodic_start (EV_A_ w);
		1570	}
		1571	#endif
		1572
		1573	#ifndef SA_RESTART
		1574	# define SA_RESTART 0
		1575	#endif
		1576
		1577	void
790	evsignal_start (struct ev_signal *w)	1578	ev_signal_start (EV_P_ ev_signal *w)
791	{	1579	{
		1580	#if EV_MULTIPLICITY
		1581	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1582	#endif
792	if (ev_is_active (w))	1583	if (expect_false (ev_is_active (w)))
793	return;	1584	return;
794		1585
		1586	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1587
795	ev_start ((W)w, 1);	1588	ev_start (EV_A_ (W)w, 1);
796	array_needsize (signals, signalmax, w->signum, signals_init);	1589	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
797	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1590	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
798		1591
799	if (!w->next)	1592	if (!((WL)w)->next)
800	{	1593	{
		1594	#if _WIN32
		1595	signal (w->signum, sighandler);
		1596	#else
801	struct sigaction sa;	1597	struct sigaction sa;
802	sa.sa_handler = sighandler;	1598	sa.sa_handler = sighandler;
803	sigfillset (&sa.sa_mask);	1599	sigfillset (&sa.sa_mask);
804	sa.sa_flags = 0;	1600	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
805	sigaction (w->signum, &sa, 0);	1601	sigaction (w->signum, &sa, 0);
		1602	#endif
806	}	1603	}
807	}	1604	}
808		1605
809	void	1606	void
810	evsignal_stop (struct ev_signal *w)	1607	ev_signal_stop (EV_P_ ev_signal *w)
811	{	1608	{
812	ev_clear ((W)w);	1609	ev_clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1610	if (expect_false (!ev_is_active (w)))
814	return;	1611	return;
815		1612
816	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1613	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
817	ev_stop ((W)w);	1614	ev_stop (EV_A_ (W)w);
818		1615
819	if (!signals [w->signum - 1].head)	1616	if (!signals [w->signum - 1].head)
820	signal (w->signum, SIG_DFL);	1617	signal (w->signum, SIG_DFL);
821	}	1618	}
822		1619
823	void evidle_start (struct ev_idle *w)	1620	void
		1621	ev_child_start (EV_P_ ev_child *w)
824	{	1622	{
		1623	#if EV_MULTIPLICITY
		1624	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1625	#endif
825	if (ev_is_active (w))	1626	if (expect_false (ev_is_active (w)))
826	return;	1627	return;
827		1628
		1629	ev_start (EV_A_ (W)w, 1);
		1630	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1631	}
		1632
		1633	void
		1634	ev_child_stop (EV_P_ ev_child *w)
		1635	{
		1636	ev_clear_pending (EV_A_ (W)w);
		1637	if (expect_false (!ev_is_active (w)))
		1638	return;
		1639
		1640	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1641	ev_stop (EV_A_ (W)w);
		1642	}
		1643
		1644	#if EV_STAT_ENABLE
		1645
		1646	# ifdef _WIN32
		1647	# undef lstat
		1648	# define lstat(a,b) _stati64 (a,b)
		1649	# endif
		1650
		1651	#define DEF_STAT_INTERVAL 5.0074891
		1652	#define MIN_STAT_INTERVAL 0.1074891
		1653
		1654	void
		1655	ev_stat_stat (EV_P_ ev_stat *w)
		1656	{
		1657	if (lstat (w->path, &w->attr) < 0)
		1658	w->attr.st_nlink = 0;
		1659	else if (!w->attr.st_nlink)
		1660	w->attr.st_nlink = 1;
		1661	}
		1662
		1663	static void
		1664	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1665	{
		1666	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		1667
		1668	/* we copy this here each the time so that */
		1669	/* prev has the old value when the callback gets invoked */
		1670	w->prev = w->attr;
		1671	ev_stat_stat (EV_A_ w);
		1672
		1673	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
		1674	ev_feed_event (EV_A_ w, EV_STAT);
		1675	}
		1676
		1677	void
		1678	ev_stat_start (EV_P_ ev_stat *w)
		1679	{
		1680	if (expect_false (ev_is_active (w)))
		1681	return;
		1682
		1683	/* since we use memcmp, we need to clear any padding data etc. */
		1684	memset (&w->prev, 0, sizeof (ev_statdata));
		1685	memset (&w->attr, 0, sizeof (ev_statdata));
		1686
		1687	ev_stat_stat (EV_A_ w);
		1688
		1689	if (w->interval < MIN_STAT_INTERVAL)
		1690	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		1691
		1692	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		1693	ev_set_priority (&w->timer, ev_priority (w));
		1694	ev_timer_start (EV_A_ &w->timer);
		1695
		1696	ev_start (EV_A_ (W)w, 1);
		1697	}
		1698
		1699	void
		1700	ev_stat_stop (EV_P_ ev_stat *w)
		1701	{
		1702	ev_clear_pending (EV_A_ (W)w);
		1703	if (expect_false (!ev_is_active (w)))
		1704	return;
		1705
		1706	ev_timer_stop (EV_A_ &w->timer);
		1707
		1708	ev_stop (EV_A_ (W)w);
		1709	}
		1710	#endif
		1711
		1712	void
		1713	ev_idle_start (EV_P_ ev_idle *w)
		1714	{
		1715	if (expect_false (ev_is_active (w)))
		1716	return;
		1717
828	ev_start ((W)w, ++idlecnt);	1718	ev_start (EV_A_ (W)w, ++idlecnt);
829	array_needsize (idles, idlemax, idlecnt, );	1719	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
830	idles [idlecnt - 1] = w;	1720	idles [idlecnt - 1] = w;
831	}	1721	}
832		1722
833	void evidle_stop (struct ev_idle *w)	1723	void
		1724	ev_idle_stop (EV_P_ ev_idle *w)
834	{	1725	{
835	ev_clear ((W)w);	1726	ev_clear_pending (EV_A_ (W)w);
836	if (ev_is_active (w))	1727	if (expect_false (!ev_is_active (w)))
837	return;	1728	return;
838		1729
		1730	{
		1731	int active = ((W)w)->active;
839	idles [w->active - 1] = idles [--idlecnt];	1732	idles [active - 1] = idles [--idlecnt];
		1733	((W)idles [active - 1])->active = active;
		1734	}
		1735
840	ev_stop ((W)w);	1736	ev_stop (EV_A_ (W)w);
841	}	1737	}
842		1738
		1739	void
843	void evprepare_start (struct ev_prepare *w)	1740	ev_prepare_start (EV_P_ ev_prepare *w)
844	{	1741	{
845	if (ev_is_active (w))	1742	if (expect_false (ev_is_active (w)))
846	return;	1743	return;
847		1744
848	ev_start ((W)w, ++preparecnt);	1745	ev_start (EV_A_ (W)w, ++preparecnt);
849	array_needsize (prepares, preparemax, preparecnt, );	1746	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
850	prepares [preparecnt - 1] = w;	1747	prepares [preparecnt - 1] = w;
851	}	1748	}
852		1749
		1750	void
853	void evprepare_stop (struct ev_prepare *w)	1751	ev_prepare_stop (EV_P_ ev_prepare *w)
854	{	1752	{
855	ev_clear ((W)w);	1753	ev_clear_pending (EV_A_ (W)w);
856	if (ev_is_active (w))	1754	if (expect_false (!ev_is_active (w)))
857	return;	1755	return;
858		1756
		1757	{
		1758	int active = ((W)w)->active;
859	prepares [w->active - 1] = prepares [--preparecnt];	1759	prepares [active - 1] = prepares [--preparecnt];
		1760	((W)prepares [active - 1])->active = active;
		1761	}
		1762
860	ev_stop ((W)w);	1763	ev_stop (EV_A_ (W)w);
861	}	1764	}
862		1765
		1766	void
863	void evcheck_start (struct ev_check *w)	1767	ev_check_start (EV_P_ ev_check *w)
864	{	1768	{
865	if (ev_is_active (w))	1769	if (expect_false (ev_is_active (w)))
866	return;	1770	return;
867		1771
868	ev_start ((W)w, ++checkcnt);	1772	ev_start (EV_A_ (W)w, ++checkcnt);
869	array_needsize (checks, checkmax, checkcnt, );	1773	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
870	checks [checkcnt - 1] = w;	1774	checks [checkcnt - 1] = w;
871	}	1775	}
872		1776
		1777	void
873	void evcheck_stop (struct ev_check *w)	1778	ev_check_stop (EV_P_ ev_check *w)
874	{	1779	{
875	ev_clear ((W)w);	1780	ev_clear_pending (EV_A_ (W)w);
876	if (ev_is_active (w))	1781	if (expect_false (!ev_is_active (w)))
877	return;	1782	return;
878		1783
		1784	{
		1785	int active = ((W)w)->active;
879	checks [w->active - 1] = checks [--checkcnt];	1786	checks [active - 1] = checks [--checkcnt];
		1787	((W)checks [active - 1])->active = active;
		1788	}
		1789
880	ev_stop ((W)w);	1790	ev_stop (EV_A_ (W)w);
881	}	1791	}
		1792
		1793	#if EV_EMBED_ENABLE
		1794	void noinline
		1795	ev_embed_sweep (EV_P_ ev_embed *w)
		1796	{
		1797	ev_loop (w->loop, EVLOOP_NONBLOCK);
		1798	}
		1799
		1800	static void
		1801	embed_cb (EV_P_ ev_io *io, int revents)
		1802	{
		1803	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		1804
		1805	if (ev_cb (w))
		1806	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		1807	else
		1808	ev_embed_sweep (loop, w);
		1809	}
		1810
		1811	void
		1812	ev_embed_start (EV_P_ ev_embed *w)
		1813	{
		1814	if (expect_false (ev_is_active (w)))
		1815	return;
		1816
		1817	{
		1818	struct ev_loop *loop = w->loop;
		1819	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		1820	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		1821	}
		1822
		1823	ev_set_priority (&w->io, ev_priority (w));
		1824	ev_io_start (EV_A_ &w->io);
		1825
		1826	ev_start (EV_A_ (W)w, 1);
		1827	}
		1828
		1829	void
		1830	ev_embed_stop (EV_P_ ev_embed *w)
		1831	{
		1832	ev_clear_pending (EV_A_ (W)w);
		1833	if (expect_false (!ev_is_active (w)))
		1834	return;
		1835
		1836	ev_io_stop (EV_A_ &w->io);
		1837
		1838	ev_stop (EV_A_ (W)w);
		1839	}
		1840	#endif
		1841
		1842	#if EV_FORK_ENABLE
		1843	void
		1844	ev_fork_start (EV_P_ ev_fork *w)
		1845	{
		1846	if (expect_false (ev_is_active (w)))
		1847	return;
		1848
		1849	ev_start (EV_A_ (W)w, ++forkcnt);
		1850	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		1851	forks [forkcnt - 1] = w;
		1852	}
		1853
		1854	void
		1855	ev_fork_stop (EV_P_ ev_fork *w)
		1856	{
		1857	ev_clear_pending (EV_A_ (W)w);
		1858	if (expect_false (!ev_is_active (w)))
		1859	return;
		1860
		1861	{
		1862	int active = ((W)w)->active;
		1863	forks [active - 1] = forks [--forkcnt];
		1864	((W)forks [active - 1])->active = active;
		1865	}
		1866
		1867	ev_stop (EV_A_ (W)w);
		1868	}
		1869	#endif
882		1870
883	/*****************************************************************************/	1871	/*****************************************************************************/
884		1872
885	struct ev_once	1873	struct ev_once
886	{	1874	{
887	struct ev_io io;	1875	ev_io io;
888	struct ev_timer to;	1876	ev_timer to;
889	void (*cb)(int revents, void *arg);	1877	void (*cb)(int revents, void *arg);
890	void *arg;	1878	void *arg;
891	};	1879	};
892		1880
893	static void	1881	static void
894	once_cb (struct ev_once *once, int revents)	1882	once_cb (EV_P_ struct ev_once *once, int revents)
895	{	1883	{
896	void (*cb)(int revents, void *arg) = once->cb;	1884	void (*cb)(int revents, void *arg) = once->cb;
897	void *arg = once->arg;	1885	void *arg = once->arg;
898		1886
899	evio_stop (&once->io);	1887	ev_io_stop (EV_A_ &once->io);
900	evtimer_stop (&once->to);	1888	ev_timer_stop (EV_A_ &once->to);
901	free (once);	1889	ev_free (once);
902		1890
903	cb (revents, arg);	1891	cb (revents, arg);
904	}	1892	}
905		1893
906	static void	1894	static void
907	once_cb_io (struct ev_io *w, int revents)	1895	once_cb_io (EV_P_ ev_io *w, int revents)
908	{	1896	{
909	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1897	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
910	}	1898	}
911		1899
912	static void	1900	static void
913	once_cb_to (struct ev_timer *w, int revents)	1901	once_cb_to (EV_P_ ev_timer *w, int revents)
914	{	1902	{
915	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1903	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
916	}	1904	}
917		1905
918	void	1906	void
919	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1907	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
920	{	1908	{
921	struct ev_once *once = malloc (sizeof (struct ev_once));	1909	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
922		1910
923	if (!once)	1911	if (expect_false (!once))
924	cb (EV_ERROR, arg);	1912	{
925	else	1913	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1914	return;
926	{	1915	}
		1916
927	once->cb = cb;	1917	once->cb = cb;
928	once->arg = arg;	1918	once->arg = arg;
929		1919
930	evw_init (&once->io, once_cb_io);	1920	ev_init (&once->io, once_cb_io);
931
932	if (fd >= 0)	1921	if (fd >= 0)
933	{	1922	{
934	evio_set (&once->io, fd, events);	1923	ev_io_set (&once->io, fd, events);
935	evio_start (&once->io);	1924	ev_io_start (EV_A_ &once->io);
936	}	1925	}
937		1926
938	evw_init (&once->to, once_cb_to);	1927	ev_init (&once->to, once_cb_to);
939
940	if (timeout >= 0.)	1928	if (timeout >= 0.)
941	{	1929	{
942	evtimer_set (&once->to, timeout, 0.);	1930	ev_timer_set (&once->to, timeout, 0.);
943	evtimer_start (&once->to);	1931	ev_timer_start (EV_A_ &once->to);
944	}
945	}
946	}
947
948	/*****************************************************************************/
949
950	#if 0
951
952	struct ev_io wio;
953
954	static void
955	sin_cb (struct ev_io *w, int revents)
956	{
957	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
958	}
959
960	static void
961	ocb (struct ev_timer *w, int revents)
962	{
963	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
964	evtimer_stop (w);
965	evtimer_start (w);
966	}
967
968	static void
969	scb (struct ev_signal *w, int revents)
970	{
971	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
972	evio_stop (&wio);
973	evio_start (&wio);
974	}
975
976	static void
977	gcb (struct ev_signal *w, int revents)
978	{
979	fprintf (stderr, "generic %x\n", revents);
980
981	}
982
983	int main (void)
984	{
985	ev_init (0);
986
987	evio_init (&wio, sin_cb, 0, EV_READ);
988	evio_start (&wio);
989
990	struct ev_timer t[10000];
991
992	#if 0
993	int i;
994	for (i = 0; i < 10000; ++i)
995	{	1932	}
996	struct ev_timer *w = t + i;
997	evw_init (w, ocb, i);
998	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
999	evtimer_start (w);
1000	if (drand48 () < 0.5)
1001	evtimer_stop (w);
1002	}
1003	#endif
1004
1005	struct ev_timer t1;
1006	evtimer_init (&t1, ocb, 5, 10);
1007	evtimer_start (&t1);
1008
1009	struct ev_signal sig;
1010	evsignal_init (&sig, scb, SIGQUIT);
1011	evsignal_start (&sig);
1012
1013	struct ev_check cw;
1014	evcheck_init (&cw, gcb);
1015	evcheck_start (&cw);
1016
1017	struct ev_idle iw;
1018	evidle_init (&iw, gcb);
1019	evidle_start (&iw);
1020
1021	ev_loop (0);
1022
1023	return 0;
1024	}	1933	}
1025		1934
		1935	#ifdef __cplusplus
		1936	}
1026	#endif	1937	#endif
1027		1938
1028
1029
1030

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