ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.23 by root, Wed Oct 31 20:10:17 2007 UTC vs.
Revision 1.142 by root, Tue Nov 27 06:19:08 2007 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
…		…
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
29		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
		37	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
		40	# include "config.h"
		41	# endif
		42
		43	# if HAVE_CLOCK_GETTIME
		44	# ifndef EV_USE_MONOTONIC
		45	# define EV_USE_MONOTONIC 1
		46	# endif
		47	# ifndef EV_USE_REALTIME
		48	# define EV_USE_REALTIME 1
		49	# endif
		50	# else
		51	# ifndef EV_USE_MONOTONIC
		52	# define EV_USE_MONOTONIC 0
		53	# endif
		54	# ifndef EV_USE_REALTIME
		55	# define EV_USE_REALTIME 0
		56	# endif
		57	# endif
		58
		59	# ifndef EV_USE_SELECT
		60	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		61	# define EV_USE_SELECT 1
		62	# else
		63	# define EV_USE_SELECT 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_POLL
		68	# if HAVE_POLL && HAVE_POLL_H
		69	# define EV_USE_POLL 1
		70	# else
		71	# define EV_USE_POLL 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_EPOLL
		76	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		77	# define EV_USE_EPOLL 1
		78	# else
		79	# define EV_USE_EPOLL 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_KQUEUE
		84	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		85	# define EV_USE_KQUEUE 1
		86	# else
		87	# define EV_USE_KQUEUE 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_PORT
		92	# if HAVE_PORT_H && HAVE_PORT_CREATE
		93	# define EV_USE_PORT 1
		94	# else
		95	# define EV_USE_PORT 0
		96	# endif
		97	# endif
		98
		99	#endif
		100
30	#include <math.h>	101	#include <math.h>
31	#include <stdlib.h>	102	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	103	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	104	#include <stddef.h>
36		105
37	#include <stdio.h>	106	#include <stdio.h>
38		107
39	#include <assert.h>	108	#include <assert.h>
40	#include <errno.h>	109	#include <errno.h>
41	#include <sys/types.h>	110	#include <sys/types.h>
42	#include <sys/wait.h>
43	#include <sys/time.h>
44	#include <time.h>	111	#include <time.h>
45		112
46	#ifndef HAVE_MONOTONIC	113	#include <signal.h>
47	# ifdef CLOCK_MONOTONIC	114
48	# define HAVE_MONOTONIC 1	115	#ifndef _WIN32
		116	# include <sys/time.h>
		117	# include <sys/wait.h>
		118	# include <unistd.h>
		119	#else
		120	# define WIN32_LEAN_AND_MEAN
		121	# include <windows.h>
		122	# ifndef EV_SELECT_IS_WINSOCKET
		123	# define EV_SELECT_IS_WINSOCKET 1
49	# endif	124	# endif
50	#endif	125	#endif
51		126
		127	/**/
		128
		129	#ifndef EV_USE_MONOTONIC
		130	# define EV_USE_MONOTONIC 0
		131	#endif
		132
		133	#ifndef EV_USE_REALTIME
		134	# define EV_USE_REALTIME 0
		135	#endif
		136
52	#ifndef HAVE_SELECT	137	#ifndef EV_USE_SELECT
53	# define HAVE_SELECT 1	138	# define EV_USE_SELECT 1
		139	#endif
		140
		141	#ifndef EV_USE_POLL
		142	# ifdef _WIN32
		143	# define EV_USE_POLL 0
		144	# else
		145	# define EV_USE_POLL 1
54	#endif	146	# endif
		147	#endif
55		148
56	#ifndef HAVE_EPOLL	149	#ifndef EV_USE_EPOLL
57	# define HAVE_EPOLL 0	150	# define EV_USE_EPOLL 0
58	#endif	151	#endif
59		152
		153	#ifndef EV_USE_KQUEUE
		154	# define EV_USE_KQUEUE 0
		155	#endif
		156
		157	#ifndef EV_USE_PORT
		158	# define EV_USE_PORT 0
		159	#endif
		160
		161	/**/
		162
		163	#ifndef CLOCK_MONOTONIC
		164	# undef EV_USE_MONOTONIC
		165	# define EV_USE_MONOTONIC 0
		166	#endif
		167
60	#ifndef HAVE_REALTIME	168	#ifndef CLOCK_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	169	# undef EV_USE_REALTIME
		170	# define EV_USE_REALTIME 0
62	#endif	171	#endif
		172
		173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
		175	#endif
		176
		177	/**/
63		178
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	179	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	180	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	181	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		182	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
67		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
68	#include "ev.h"	187	# include "ev.h"
		188	#endif
69		189
		190	#if __GNUC__ >= 3
		191	# define expect(expr,value) __builtin_expect ((expr),(value))
		192	# define inline_size static inline /* inline for codesize */
		193	# if EV_MINIMAL
		194	# define noinline __attribute__ ((noinline))
		195	# define inline_speed static noinline
		196	# else
		197	# define noinline
		198	# define inline_speed static inline
		199	# endif
		200	#else
		201	# define expect(expr,value) (expr)
		202	# define inline_speed static
		203	# define inline_minimal static
		204	# define noinline
		205	#endif
		206
		207	#define expect_false(expr) expect ((expr) != 0, 0)
		208	#define expect_true(expr) expect ((expr) != 0, 1)
		209
		210	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		211	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		212
		213	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		214	#define EMPTY2(a,b) /* used to suppress some warnings */
		215
70	typedef struct ev_watcher *W;	216	typedef ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	217	typedef ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	218	typedef ev_watcher_time *WT;
73		219
74	static ev_tstamp now, diff; /* monotonic clock */	220	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		221
		222	#ifdef _WIN32
		223	# include "ev_win32.c"
		224	#endif
		225
		226	/*****************************************************************************/
		227
		228	static void (*syserr_cb)(const char *msg);
		229
		230	void
		231	ev_set_syserr_cb (void (*cb)(const char *msg))
		232	{
		233	syserr_cb = cb;
		234	}
		235
		236	static void noinline
		237	syserr (const char *msg)
		238	{
		239	if (!msg)
		240	msg = "(libev) system error";
		241
		242	if (syserr_cb)
		243	syserr_cb (msg);
		244	else
		245	{
		246	perror (msg);
		247	abort ();
		248	}
		249	}
		250
		251	static void *(*alloc)(void *ptr, long size);
		252
		253	void
		254	ev_set_allocator (void *(*cb)(void *ptr, long size))
		255	{
		256	alloc = cb;
		257	}
		258
		259	static void *
		260	ev_realloc (void *ptr, long size)
		261	{
		262	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		263
		264	if (!ptr && size)
		265	{
		266	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		267	abort ();
		268	}
		269
		270	return ptr;
		271	}
		272
		273	#define ev_malloc(size) ev_realloc (0, (size))
		274	#define ev_free(ptr) ev_realloc ((ptr), 0)
		275
		276	/*****************************************************************************/
		277
		278	typedef struct
		279	{
		280	WL head;
		281	unsigned char events;
		282	unsigned char reify;
		283	#if EV_SELECT_IS_WINSOCKET
		284	SOCKET handle;
		285	#endif
		286	} ANFD;
		287
		288	typedef struct
		289	{
		290	W w;
		291	int events;
		292	} ANPENDING;
		293
		294	#if EV_MULTIPLICITY
		295
		296	struct ev_loop
		297	{
		298	ev_tstamp ev_rt_now;
		299	#define ev_rt_now ((loop)->ev_rt_now)
		300	#define VAR(name,decl) decl;
		301	#include "ev_vars.h"
		302	#undef VAR
		303	};
		304	#include "ev_wrap.h"
		305
		306	static struct ev_loop default_loop_struct;
		307	struct ev_loop *ev_default_loop_ptr;
		308
		309	#else
		310
75	ev_tstamp ev_now;	311	ev_tstamp ev_rt_now;
76	int ev_method;	312	#define VAR(name,decl) static decl;
		313	#include "ev_vars.h"
		314	#undef VAR
77		315
78	static int have_monotonic; /* runtime */	316	static int ev_default_loop_ptr;
79		317
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	318	#endif
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		319
84	/*****************************************************************************/	320	/*****************************************************************************/
85		321
86	ev_tstamp	322	ev_tstamp
87	ev_time (void)	323	ev_time (void)
88	{	324	{
89	#if HAVE_REALTIME	325	#if EV_USE_REALTIME
90	struct timespec ts;	326	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	327	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	328	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	329	#else
94	struct timeval tv;	330	struct timeval tv;
95	gettimeofday (&tv, 0);	331	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	332	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	333	#endif
98	}	334	}
99		335
100	static ev_tstamp	336	ev_tstamp inline_size
101	get_clock (void)	337	get_clock (void)
102	{	338	{
103	#if HAVE_MONOTONIC	339	#if EV_USE_MONOTONIC
104	if (have_monotonic)	340	if (expect_true (have_monotonic))
105	{	341	{
106	struct timespec ts;	342	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	343	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	344	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	345	}
110	#endif	346	#endif
111		347
112	return ev_time ();	348	return ev_time ();
113	}	349	}
114		350
		351	#if EV_MULTIPLICITY
		352	ev_tstamp
		353	ev_now (EV_P)
		354	{
		355	return ev_rt_now;
		356	}
		357	#endif
		358
		359	#define array_roundsize(type,n) (((n) | 4) & ~3)
		360
115	#define array_needsize(base,cur,cnt,init) \	361	#define array_needsize(type,base,cur,cnt,init) \
116	if ((cnt) > cur) \	362	if (expect_false ((cnt) > cur)) \
117	{ \	363	{ \
118	int newcnt = cur; \	364	int newcnt = cur; \
119	do \	365	do \
120	{ \	366	{ \
121	newcnt = (newcnt << 1) | 4 & ~3; \	367	newcnt = array_roundsize (type, newcnt << 1); \
122	} \	368	} \
123	while ((cnt) > newcnt); \	369	while ((cnt) > newcnt); \
124	\	370	\
125	base = realloc (base, sizeof (*base) * (newcnt)); \	371	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
126	init (base + cur, newcnt - cur); \	372	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	373	cur = newcnt; \
128	}	374	}
		375
		376	#define array_slim(type,stem) \
		377	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		378	{ \
		379	stem ## max = array_roundsize (stem ## cnt >> 1); \
		380	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		381	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		382	}
		383
		384	#define array_free(stem, idx) \
		385	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
129		386
130	/*****************************************************************************/	387	/*****************************************************************************/
131		388
		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
132	typedef struct	613	typedef struct
133	{	614	{
134	struct ev_io *head;	615	WL head;
135	unsigned char wev, rev; /* want, received event set */
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140
141	static int *fdchanges;
142	static int fdchangemax, fdchangecnt;
143
144	static void
145	anfds_init (ANFD *base, int count)
146	{
147	while (count--)
148	{
149	base->head = 0;
150	base->wev = base->rev = EV_NONE;
151	++base;
152	}
153	}
154
155	typedef struct
156	{
157	W w;
158	int events;
159	} ANPENDING;
160
161	static ANPENDING *pendings;
162	static int pendingmax, pendingcnt;
163
164	static void
165	event (W w, int events)
166	{
167	if (w->active)
168	{
169	w->pending = ++pendingcnt;
170	array_needsize (pendings, pendingmax, pendingcnt, );
171	pendings [pendingcnt - 1].w = w;
172	pendings [pendingcnt - 1].events = events;
173	}
174	}
175
176	static void
177	fd_event (int fd, int events)
178	{
179	ANFD *anfd = anfds + fd;
180	struct ev_io *w;
181
182	for (w = anfd->head; w; w = w->next)
183	{
184	int ev = w->events & events;
185
186	if (ev)
187	event ((W)w, ev);
188	}
189	}
190
191	static void
192	queue_events (W *events, int eventcnt, int type)
193	{
194	int i;
195
196	for (i = 0; i < eventcnt; ++i)
197	event (events [i], type);
198	}
199
200	/* called on EBADF to verify fds */
201	static void
202	fd_recheck ()
203	{
204	int fd;
205
206	for (fd = 0; fd < anfdmax; ++fd)
207	if (anfds [fd].wev)
208	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
209	while (anfds [fd].head)
210	evio_stop (anfds [fd].head);
211	}
212
213	/*****************************************************************************/
214
215	static struct ev_timer **timers;
216	static int timermax, timercnt;
217
218	static struct ev_periodic **periodics;
219	static int periodicmax, periodiccnt;
220
221	static void
222	upheap (WT *timers, int k)
223	{
224	WT w = timers [k];
225
226	while (k && timers [k >> 1]->at > w->at)
227	{
228	timers [k] = timers [k >> 1];
229	timers [k]->active = k + 1;
230	k >>= 1;
231	}
232
233	timers [k] = w;
234	timers [k]->active = k + 1;
235
236	}
237
238	static void
239	downheap (WT *timers, int N, int k)
240	{
241	WT w = timers [k];
242
243	while (k < (N >> 1))
244	{
245	int j = k << 1;
246
247	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
248	++j;
249
250	if (w->at <= timers [j]->at)
251	break;
252
253	timers [k] = timers [j];
254	timers [k]->active = k + 1;
255	k = j;
256	}
257
258	timers [k] = w;
259	timers [k]->active = k + 1;
260	}
261
262	/*****************************************************************************/
263
264	typedef struct
265	{
266	struct ev_signal *head;
267	sig_atomic_t gotsig;	616	sig_atomic_t volatile gotsig;
268	} ANSIG;	617	} ANSIG;
269		618
270	static ANSIG *signals;	619	static ANSIG *signals;
271	static int signalmax;	620	static int signalmax;
272		621
273	static int sigpipe [2];	622	static int sigpipe [2];
274	static sig_atomic_t gotsig;	623	static sig_atomic_t volatile gotsig;
275	static struct ev_io sigev;	624	static ev_io sigev;
276		625
277	static void	626	void inline_size
278	signals_init (ANSIG *base, int count)	627	signals_init (ANSIG *base, int count)
279	{	628	{
280	while (count--)	629	while (count--)
281	{	630	{
282	base->head = 0;	631	base->head = 0;
283	base->gotsig = 0;	632	base->gotsig = 0;
		633
284	++base;	634	++base;
285	}	635	}
286	}	636	}
287		637
288	static void	638	static void
289	sighandler (int signum)	639	sighandler (int signum)
290	{	640	{
		641	#if _WIN32
		642	signal (signum, sighandler);
		643	#endif
		644
291	signals [signum - 1].gotsig = 1;	645	signals [signum - 1].gotsig = 1;
292		646
293	if (!gotsig)	647	if (!gotsig)
294	{	648	{
		649	int old_errno = errno;
295	gotsig = 1;	650	gotsig = 1;
296	write (sigpipe [1], &gotsig, 1);	651	write (sigpipe [1], &signum, 1);
		652	errno = old_errno;
297	}	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);
298	}	674	}
299		675
300	static void	676	static void
301	sigcb (struct ev_io *iow, int revents)	677	sigcb (EV_P_ ev_io *iow, int revents)
302	{	678	{
303	struct ev_signal *w;
304	int sig;	679	int signum;
305		680
		681	read (sigpipe [0], &revents, 1);
306	gotsig = 0;	682	gotsig = 0;
307	read (sigpipe [0], &revents, 1);
308		683
309	for (sig = signalmax; sig--; )	684	for (signum = signalmax; signum--; )
310	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)
311	{	727	{
312	signals [sig].gotsig = 0;	728	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
313		729	w->rpid = pid;
314	for (w = signals [sig].head; w; w = w->next)	730	w->rstatus = status;
315	event ((W)w, EV_SIGNAL);	731	ev_feed_event (EV_A_ (W)w, EV_CHILD);
316	}	732	}
317	}	733	}
318
319	static void
320	siginit (void)
321	{
322	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
323	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
324
325	/* rather than sort out wether we really need nb, set it */
326	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
327	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
328
329	evio_set (&sigev, sigpipe [0], EV_READ);
330	evio_start (&sigev);
331	}
332
333	/*****************************************************************************/
334
335	static struct ev_idle **idles;
336	static int idlemax, idlecnt;
337
338	static struct ev_prepare **prepares;
339	static int preparemax, preparecnt;
340
341	static struct ev_check **checks;
342	static int checkmax, checkcnt;
343
344	/*****************************************************************************/
345
346	static struct ev_child *childs [PID_HASHSIZE];
347	static struct ev_signal childev;
348		734
349	#ifndef WCONTINUED	735	#ifndef WCONTINUED
350	# define WCONTINUED 0	736	# define WCONTINUED 0
351	#endif	737	#endif
352		738
353	static void	739	static void
354	childcb (struct ev_signal *sw, int revents)	740	childcb (EV_P_ ev_signal *sw, int revents)
355	{	741	{
356	struct ev_child *w;
357	int pid, status;	742	int pid, status;
358		743
		744	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
359	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	745	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
360	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	746	if (!WCONTINUED
361	if (w->pid == pid || w->pid == -1)	747	|| errno != EINVAL
362	{	748	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
363	w->status = status;	749	return;
364	event ((W)w, EV_CHILD);	750
365	}	751	/* make sure we are called again until all childs have been reaped */
		752	/* we need to do it this way so that the callback gets called before we continue */
		753	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		754
		755	child_reap (EV_A_ sw, pid, pid, status);
		756	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
366	}	757	}
		758
		759	#endif
367		760
368	/*****************************************************************************/	761	/*****************************************************************************/
369		762
		763	#if EV_USE_PORT
		764	# include "ev_port.c"
		765	#endif
		766	#if EV_USE_KQUEUE
		767	# include "ev_kqueue.c"
		768	#endif
370	#if HAVE_EPOLL	769	#if EV_USE_EPOLL
371	# include "ev_epoll.c"	770	# include "ev_epoll.c"
372	#endif	771	#endif
		772	#if EV_USE_POLL
		773	# include "ev_poll.c"
		774	#endif
373	#if HAVE_SELECT	775	#if EV_USE_SELECT
374	# include "ev_select.c"	776	# include "ev_select.c"
375	#endif	777	#endif
376		778
377	int ev_init (int flags)	779	int
		780	ev_version_major (void)
378	{	781	{
379	if (!ev_method)	782	return EV_VERSION_MAJOR;
		783	}
		784
		785	int
		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)
380	{	853	{
381	#if HAVE_MONOTONIC	854	#if EV_USE_MONOTONIC
382	{	855	{
383	struct timespec ts;	856	struct timespec ts;
384	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	857	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
385	have_monotonic = 1;	858	have_monotonic = 1;
386	}	859	}
387	#endif	860	#endif
388		861
389	ev_now = ev_time ();	862	ev_rt_now = ev_time ();
390	now = get_clock ();	863	mn_now = get_clock ();
		864	now_floor = mn_now;
391	diff = ev_now - now;	865	rtmn_diff = ev_rt_now - mn_now;
392		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])
393	if (pipe (sigpipe))	1005	if (pipe (sigpipe))
394	return 0;	1006	return 0;
395		1007
396	ev_method = EVMETHOD_NONE;	1008	if (!ev_default_loop_ptr)
397	#if HAVE_EPOLL	1009	{
398	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	1010	#if EV_MULTIPLICITY
		1011	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1012	#else
		1013	ev_default_loop_ptr = 1;
399	#endif	1014	#endif
400	#if HAVE_SELECT
401	if (ev_method == EVMETHOD_NONE) select_init (flags);
402	#endif
403		1015
404	if (ev_method)	1016	loop_init (EV_A_ flags);
		1017
		1018	if (ev_backend (EV_A))
405	{	1019	{
406	evw_init (&sigev, sigcb);
407	siginit ();	1020	siginit (EV_A);
408		1021
		1022	#ifndef _WIN32
409	evsignal_init (&childev, childcb, SIGCHLD);	1023	ev_signal_init (&childev, childcb, SIGCHLD);
		1024	ev_set_priority (&childev, EV_MAXPRI);
410	evsignal_start (&childev);	1025	ev_signal_start (EV_A_ &childev);
		1026	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1027	#endif
411	}	1028	}
		1029	else
		1030	ev_default_loop_ptr = 0;
412	}	1031	}
413		1032
414	return ev_method;	1033	return ev_default_loop_ptr;
		1034	}
		1035
		1036	void
		1037	ev_default_destroy (void)
		1038	{
		1039	#if EV_MULTIPLICITY
		1040	struct ev_loop *loop = ev_default_loop_ptr;
		1041	#endif
		1042
		1043	#ifndef _WIN32
		1044	ev_ref (EV_A); /* child watcher */
		1045	ev_signal_stop (EV_A_ &childev);
		1046	#endif
		1047
		1048	ev_ref (EV_A); /* signal watcher */
		1049	ev_io_stop (EV_A_ &sigev);
		1050
		1051	close (sigpipe [0]); sigpipe [0] = 0;
		1052	close (sigpipe [1]); sigpipe [1] = 0;
		1053
		1054	loop_destroy (EV_A);
		1055	}
		1056
		1057	void
		1058	ev_default_fork (void)
		1059	{
		1060	#if EV_MULTIPLICITY
		1061	struct ev_loop *loop = ev_default_loop_ptr;
		1062	#endif
		1063
		1064	if (backend)
		1065	postfork = 1;
415	}	1066	}
416		1067
417	/*****************************************************************************/	1068	/*****************************************************************************/
418		1069
419	void ev_prefork (void)	1070	int inline_size
		1071	any_pending (EV_P)
420	{	1072	{
421	/* nop */
422	}
423
424	void ev_postfork_parent (void)
425	{
426	/* nop */
427	}
428
429	void ev_postfork_child (void)
430	{
431	#if HAVE_EPOLL
432	if (ev_method == EVMETHOD_EPOLL)
433	epoll_postfork_child ();
434	#endif
435
436	evio_stop (&sigev);
437	close (sigpipe [0]);
438	close (sigpipe [1]);
439	pipe (sigpipe);
440	siginit ();
441	}
442
443	/*****************************************************************************/
444
445	static void
446	fd_reify (void)
447	{
448	int i;	1073	int pri;
449		1074
450	for (i = 0; i < fdchangecnt; ++i)	1075	for (pri = NUMPRI; pri--; )
		1076	if (pendingcnt [pri])
		1077	return 1;
		1078
		1079	return 0;
		1080	}
		1081
		1082	void inline_speed
		1083	call_pending (EV_P)
		1084	{
		1085	int pri;
		1086
		1087	for (pri = NUMPRI; pri--; )
		1088	while (pendingcnt [pri])
451	{	1089	{
452	int fd = fdchanges [i];	1090	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
453	ANFD *anfd = anfds + fd;
454	struct ev_io *w;
455		1091
456	int wev = 0;	1092	if (expect_true (p->w))
457
458	for (w = anfd->head; w; w = w->next)
459	wev |= w->events;
460
461	if (anfd->wev != wev)
462	{	1093	{
463	method_modify (fd, anfd->wev, wev);	1094	assert (("non-pending watcher on pending list", p->w->pending));
464	anfd->wev = wev;
465	}
466	}
467		1095
468	fdchangecnt = 0;
469	}
470
471	static void
472	call_pending ()
473	{
474	while (pendingcnt)
475	{
476	ANPENDING *p = pendings + --pendingcnt;
477
478	if (p->w)
479	{
480	p->w->pending = 0;	1096	p->w->pending = 0;
481	p->w->cb (p->w, p->events);	1097	EV_CB_INVOKE (p->w, p->events);
482	}	1098	}
483	}	1099	}
484	}	1100	}
485		1101
486	static void	1102	void inline_size
487	timers_reify ()	1103	timers_reify (EV_P)
488	{	1104	{
489	while (timercnt && timers [0]->at <= now)	1105	while (timercnt && ((WT)timers [0])->at <= mn_now)
490	{	1106	{
491	struct ev_timer *w = timers [0];	1107	ev_timer *w = timers [0];
492		1108
493	event ((W)w, EV_TIMEOUT);	1109	assert (("inactive timer on timer heap detected", ev_is_active (w)));
494		1110
495	/* first reschedule or stop timer */	1111	/* first reschedule or stop timer */
496	if (w->repeat)	1112	if (w->repeat)
497	{	1113	{
		1114	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1115
498	w->at = now + w->repeat;	1116	((WT)w)->at += w->repeat;
499	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
500	downheap ((WT *)timers, timercnt, 0);	1120	downheap ((WT *)timers, timercnt, 0);
501	}	1121	}
502	else	1122	else
503	evtimer_stop (w); /* nonrepeating: stop timer */	1123	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
504	}
505	}
506		1124
507	static void	1125	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1126	}
		1127	}
		1128
		1129	#if EV_PERIODIC_ENABLE
		1130	void inline_size
508	periodics_reify ()	1131	periodics_reify (EV_P)
509	{	1132	{
510	while (periodiccnt && periodics [0]->at <= ev_now)	1133	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
511	{	1134	{
512	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)));
513		1138
514	/* first reschedule or stop timer */	1139	/* first reschedule or stop timer */
515	if (w->interval)	1140	if (w->reschedule_cb)
516	{	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	{
517	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;
518	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));
519	downheap ((WT *)periodics, periodiccnt, 0);	1150	downheap ((WT *)periodics, periodiccnt, 0);
520	}	1151	}
521	else	1152	else
522	evperiodic_stop (w); /* nonrepeating: stop timer */	1153	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
523		1154
524	event ((W)w, EV_TIMEOUT);	1155	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
525	}	1156	}
526	}	1157	}
527		1158
528	static void	1159	static void noinline
529	periodics_reschedule (ev_tstamp diff)	1160	periodics_reschedule (EV_P)
530	{	1161	{
531	int i;	1162	int i;
532		1163
533	/* adjust periodics after time jump */	1164	/* adjust periodics after time jump */
534	for (i = 0; i < periodiccnt; ++i)	1165	for (i = 0; i < periodiccnt; ++i)
535	{	1166	{
536	struct ev_periodic *w = periodics [i];	1167	ev_periodic *w = periodics [i];
537		1168
		1169	if (w->reschedule_cb)
		1170	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
538	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))
539	{	1208	{
540	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1209	ev_tstamp odiff = rtmn_diff;
541		1210
542	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; )
543	{	1220	{
544	evperiodic_stop (w);	1221	rtmn_diff = ev_rt_now - mn_now;
545	evperiodic_start (w);
546		1222
547	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;
548	}	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) */
549	}	1236	}
550	}	1237	}
551	}	1238	else
552		1239	#endif
553	static void	1240	{
554	time_update ()
555	{
556	int i;
557
558	ev_now = ev_time ();	1241	ev_rt_now = ev_time ();
559		1242
560	if (have_monotonic)	1243	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
561	{
562	ev_tstamp odiff = diff;
563
564	for (i = 4; --i; ) /* loop a few times, before making important decisions */
565	{	1244	{
566	now = get_clock ();	1245	#if EV_PERIODIC_ENABLE
567	diff = ev_now - now;
568
569	if (fabs (odiff - diff) < MIN_TIMEJUMP)
570	return; /* all is well */
571
572	ev_now = ev_time ();
573	}
574
575	periodics_reschedule (diff - odiff);
576	/* no timer adjustment, as the monotonic clock doesn't jump */
577	}
578	else
579	{
580	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
581	{
582	periodics_reschedule (ev_now - now);	1246	periodics_reschedule (EV_A);
		1247	#endif
583		1248
584	/* 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 */
585	for (i = 0; i < timercnt; ++i)	1250	for (i = 0; i < timercnt; ++i)
586	timers [i]->at += diff;	1251	((WT)timers [i])->at += ev_rt_now - mn_now;
587	}	1252	}
588		1253
589	now = ev_now;	1254	mn_now = ev_rt_now;
590	}	1255	}
591	}	1256	}
592		1257
593	int ev_loop_done;	1258	void
		1259	ev_ref (EV_P)
		1260	{
		1261	++activecnt;
		1262	}
594		1263
		1264	void
		1265	ev_unref (EV_P)
		1266	{
		1267	--activecnt;
		1268	}
		1269
		1270	static int loop_done;
		1271
		1272	void
595	void ev_loop (int flags)	1273	ev_loop (EV_P_ int flags)
596	{	1274	{
597	double block;	1275	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
598	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1276	? EVUNLOOP_ONE
		1277	: EVUNLOOP_CANCEL;
599		1278
600	do	1279	while (activecnt)
601	{	1280	{
602	/* queue check watchers (and execute them) */	1281	/* queue check watchers (and execute them) */
603	if (preparecnt)	1282	if (expect_false (preparecnt))
604	{	1283	{
605	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1284	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
606	call_pending ();	1285	call_pending (EV_A);
607	}	1286	}
608		1287
		1288	/* we might have forked, so reify kernel state if necessary */
		1289	if (expect_false (postfork))
		1290	loop_fork (EV_A);
		1291
609	/* update fd-related kernel structures */	1292	/* update fd-related kernel structures */
610	fd_reify ();	1293	fd_reify (EV_A);
611		1294
612	/* calculate blocking time */	1295	/* calculate blocking time */
		1296	{
		1297	double block;
613		1298
614	/* we only need this for !monotonic clockor timers, but as we basically
615	always have timers, we just calculate it always */
616	ev_now = ev_time ();
617
618	if (flags & EVLOOP_NONBLOCK || idlecnt)	1299	if (flags & EVLOOP_NONBLOCK || idlecnt)
619	block = 0.;	1300	block = 0.; /* do not block at all */
620	else	1301	else
621	{	1302	{
		1303	/* update time to cancel out callback processing overhead */
		1304	#if EV_USE_MONOTONIC
		1305	if (expect_true (have_monotonic))
		1306	time_update_monotonic (EV_A);
		1307	else
		1308	#endif
		1309	{
		1310	ev_rt_now = ev_time ();
		1311	mn_now = ev_rt_now;
		1312	}
		1313
622	block = MAX_BLOCKTIME;	1314	block = MAX_BLOCKTIME;
623		1315
624	if (timercnt)	1316	if (timercnt)
625	{	1317	{
626	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1318	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
627	if (block > to) block = to;	1319	if (block > to) block = to;
628	}	1320	}
629		1321
		1322	#if EV_PERIODIC_ENABLE
630	if (periodiccnt)	1323	if (periodiccnt)
631	{	1324	{
632	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1325	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
633	if (block > to) block = to;	1326	if (block > to) block = to;
634	}	1327	}
		1328	#endif
635		1329
636	if (block < 0.) block = 0.;	1330	if (expect_false (block < 0.)) block = 0.;
637	}	1331	}
638		1332
639	method_poll (block);	1333	backend_poll (EV_A_ block);
		1334	}
640		1335
641	/* update ev_now, do magic */	1336	/* update ev_rt_now, do magic */
642	time_update ();	1337	time_update (EV_A);
643		1338
644	/* queue pending timers and reschedule them */	1339	/* queue pending timers and reschedule them */
645	timers_reify (); /* relative timers called last */	1340	timers_reify (EV_A); /* relative timers called last */
		1341	#if EV_PERIODIC_ENABLE
646	periodics_reify (); /* absolute timers called first */	1342	periodics_reify (EV_A); /* absolute timers called first */
		1343	#endif
647		1344
648	/* queue idle watchers unless io or timers are pending */	1345	/* queue idle watchers unless other events are pending */
649	if (!pendingcnt)	1346	if (idlecnt && !any_pending (EV_A))
650	queue_events ((W *)idles, idlecnt, EV_IDLE);	1347	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
651		1348
652	/* queue check watchers, to be executed first */	1349	/* queue check watchers, to be executed first */
653	if (checkcnt)	1350	if (expect_false (checkcnt))
654	queue_events ((W *)checks, checkcnt, EV_CHECK);	1351	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
655		1352
656	call_pending ();	1353	call_pending (EV_A);
657	}
658	while (!ev_loop_done);
659		1354
660	if (ev_loop_done != 2)	1355	if (expect_false (loop_done))
		1356	break;
		1357	}
		1358
		1359	if (loop_done == EVUNLOOP_ONE)
		1360	loop_done = EVUNLOOP_CANCEL;
		1361	}
		1362
		1363	void
		1364	ev_unloop (EV_P_ int how)
		1365	{
661	ev_loop_done = 0;	1366	loop_done = how;
662	}	1367	}
663		1368
664	/*****************************************************************************/	1369	/*****************************************************************************/
665		1370
666	static void	1371	void inline_size
667	wlist_add (WL *head, WL elem)	1372	wlist_add (WL *head, WL elem)
668	{	1373	{
669	elem->next = *head;	1374	elem->next = *head;
670	*head = elem;	1375	*head = elem;
671	}	1376	}
672		1377
673	static void	1378	void inline_size
674	wlist_del (WL *head, WL elem)	1379	wlist_del (WL *head, WL elem)
675	{	1380	{
676	while (*head)	1381	while (*head)
677	{	1382	{
678	if (*head == elem)	1383	if (*head == elem)
…		…
683		1388
684	head = &(*head)->next;	1389	head = &(*head)->next;
685	}	1390	}
686	}	1391	}
687		1392
688	static void	1393	void inline_speed
689	ev_clear (W w)	1394	ev_clear_pending (EV_P_ W w)
690	{	1395	{
691	if (w->pending)	1396	if (w->pending)
692	{	1397	{
693	pendings [w->pending - 1].w = 0;	1398	pendings [ABSPRI (w)][w->pending - 1].w = 0;
694	w->pending = 0;	1399	w->pending = 0;
695	}	1400	}
696	}	1401	}
697		1402
698	static void	1403	void inline_speed
699	ev_start (W w, int active)	1404	ev_start (EV_P_ W w, int active)
700	{	1405	{
		1406	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1407	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1408
701	w->active = active;	1409	w->active = active;
		1410	ev_ref (EV_A);
702	}	1411	}
703		1412
704	static void	1413	void inline_size
705	ev_stop (W w)	1414	ev_stop (EV_P_ W w)
706	{	1415	{
		1416	ev_unref (EV_A);
707	w->active = 0;	1417	w->active = 0;
708	}	1418	}
709		1419
710	/*****************************************************************************/	1420	/*****************************************************************************/
711		1421
712	void	1422	void
713	evio_start (struct ev_io *w)	1423	ev_io_start (EV_P_ ev_io *w)
714	{	1424	{
715	if (ev_is_active (w))
716	return;
717
718	int fd = w->fd;	1425	int fd = w->fd;
719		1426
		1427	if (expect_false (ev_is_active (w)))
		1428	return;
		1429
		1430	assert (("ev_io_start called with negative fd", fd >= 0));
		1431
720	ev_start ((W)w, 1);	1432	ev_start (EV_A_ (W)w, 1);
721	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1433	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
722	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1434	wlist_add ((WL *)&anfds[fd].head, (WL)w);
723		1435
724	++fdchangecnt;	1436	fd_change (EV_A_ fd);
725	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
726	fdchanges [fdchangecnt - 1] = fd;
727	}	1437	}
728		1438
729	void	1439	void
730	evio_stop (struct ev_io *w)	1440	ev_io_stop (EV_P_ ev_io *w)
731	{	1441	{
732	ev_clear ((W)w);	1442	ev_clear_pending (EV_A_ (W)w);
733	if (!ev_is_active (w))	1443	if (expect_false (!ev_is_active (w)))
734	return;	1444	return;
		1445
		1446	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
735		1447
736	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1448	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
737	ev_stop ((W)w);	1449	ev_stop (EV_A_ (W)w);
738		1450
739	++fdchangecnt;	1451	fd_change (EV_A_ w->fd);
740	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
741	fdchanges [fdchangecnt - 1] = w->fd;
742	}	1452	}
743		1453
744	void	1454	void
745	evtimer_start (struct ev_timer *w)	1455	ev_timer_start (EV_P_ ev_timer *w)
746	{	1456	{
747	if (ev_is_active (w))	1457	if (expect_false (ev_is_active (w)))
748	return;	1458	return;
749		1459
750	w->at += now;	1460	((WT)w)->at += mn_now;
751		1461
752	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1462	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
753		1463
754	ev_start ((W)w, ++timercnt);	1464	ev_start (EV_A_ (W)w, ++timercnt);
755	array_needsize (timers, timermax, timercnt, );	1465	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
756	timers [timercnt - 1] = w;	1466	timers [timercnt - 1] = w;
757	upheap ((WT *)timers, timercnt - 1);	1467	upheap ((WT *)timers, timercnt - 1);
758	}
759		1468
		1469	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1470	}
		1471
760	void	1472	void
761	evtimer_stop (struct ev_timer *w)	1473	ev_timer_stop (EV_P_ ev_timer *w)
762	{	1474	{
763	ev_clear ((W)w);	1475	ev_clear_pending (EV_A_ (W)w);
764	if (!ev_is_active (w))	1476	if (expect_false (!ev_is_active (w)))
765	return;	1477	return;
766		1478
		1479	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1480
767	if (w->active < timercnt--)	1481	if (expect_true (((W)w)->active < timercnt--))
768	{	1482	{
769	timers [w->active - 1] = timers [timercnt];	1483	timers [((W)w)->active - 1] = timers [timercnt];
770	downheap ((WT *)timers, timercnt, w->active - 1);	1484	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
771	}	1485	}
772		1486
773	w->at = w->repeat;	1487	((WT)w)->at -= mn_now;
774		1488
775	ev_stop ((W)w);	1489	ev_stop (EV_A_ (W)w);
776	}	1490	}
777		1491
778	void	1492	void
779	evtimer_again (struct ev_timer *w)	1493	ev_timer_again (EV_P_ ev_timer *w)
780	{	1494	{
781	if (ev_is_active (w))	1495	if (ev_is_active (w))
782	{	1496	{
783	if (w->repeat)	1497	if (w->repeat)
784	{	1498	{
785	w->at = now + w->repeat;	1499	((WT)w)->at = mn_now + w->repeat;
786	downheap ((WT *)timers, timercnt, w->active - 1);	1500	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
787	}	1501	}
788	else	1502	else
789	evtimer_stop (w);	1503	ev_timer_stop (EV_A_ w);
790	}	1504	}
791	else if (w->repeat)	1505	else if (w->repeat)
		1506	{
		1507	w->at = w->repeat;
792	evtimer_start (w);	1508	ev_timer_start (EV_A_ w);
		1509	}
793	}	1510	}
794		1511
		1512	#if EV_PERIODIC_ENABLE
795	void	1513	void
796	evperiodic_start (struct ev_periodic *w)	1514	ev_periodic_start (EV_P_ ev_periodic *w)
797	{	1515	{
798	if (ev_is_active (w))	1516	if (expect_false (ev_is_active (w)))
799	return;	1517	return;
800		1518
801	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1519	if (w->reschedule_cb)
802		1520	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1521	else if (w->interval)
		1522	{
		1523	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
803	/* this formula differs from the one in periodic_reify because we do not always round up */	1524	/* this formula differs from the one in periodic_reify because we do not always round up */
804	if (w->interval)
805	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1525	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1526	}
806		1527
807	ev_start ((W)w, ++periodiccnt);	1528	ev_start (EV_A_ (W)w, ++periodiccnt);
808	array_needsize (periodics, periodicmax, periodiccnt, );	1529	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
809	periodics [periodiccnt - 1] = w;	1530	periodics [periodiccnt - 1] = w;
810	upheap ((WT *)periodics, periodiccnt - 1);	1531	upheap ((WT *)periodics, periodiccnt - 1);
811	}
812		1532
		1533	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1534	}
		1535
813	void	1536	void
814	evperiodic_stop (struct ev_periodic *w)	1537	ev_periodic_stop (EV_P_ ev_periodic *w)
815	{	1538	{
816	ev_clear ((W)w);	1539	ev_clear_pending (EV_A_ (W)w);
817	if (!ev_is_active (w))	1540	if (expect_false (!ev_is_active (w)))
818	return;	1541	return;
819		1542
		1543	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1544
820	if (w->active < periodiccnt--)	1545	if (expect_true (((W)w)->active < periodiccnt--))
821	{	1546	{
822	periodics [w->active - 1] = periodics [periodiccnt];	1547	periodics [((W)w)->active - 1] = periodics [periodiccnt];
823	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1548	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
824	}	1549	}
825		1550
826	ev_stop ((W)w);	1551	ev_stop (EV_A_ (W)w);
827	}	1552	}
828		1553
829	void	1554	void
		1555	ev_periodic_again (EV_P_ ev_periodic *w)
		1556	{
		1557	/* TODO: use adjustheap and recalculation */
		1558	ev_periodic_stop (EV_A_ w);
		1559	ev_periodic_start (EV_A_ w);
		1560	}
		1561	#endif
		1562
		1563	void
		1564	ev_idle_start (EV_P_ ev_idle *w)
		1565	{
		1566	if (expect_false (ev_is_active (w)))
		1567	return;
		1568
		1569	ev_start (EV_A_ (W)w, ++idlecnt);
		1570	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1571	idles [idlecnt - 1] = w;
		1572	}
		1573
		1574	void
		1575	ev_idle_stop (EV_P_ ev_idle *w)
		1576	{
		1577	ev_clear_pending (EV_A_ (W)w);
		1578	if (expect_false (!ev_is_active (w)))
		1579	return;
		1580
		1581	{
		1582	int active = ((W)w)->active;
		1583	idles [active - 1] = idles [--idlecnt];
		1584	((W)idles [active - 1])->active = active;
		1585	}
		1586
		1587	ev_stop (EV_A_ (W)w);
		1588	}
		1589
		1590	void
		1591	ev_prepare_start (EV_P_ ev_prepare *w)
		1592	{
		1593	if (expect_false (ev_is_active (w)))
		1594	return;
		1595
		1596	ev_start (EV_A_ (W)w, ++preparecnt);
		1597	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1598	prepares [preparecnt - 1] = w;
		1599	}
		1600
		1601	void
		1602	ev_prepare_stop (EV_P_ ev_prepare *w)
		1603	{
		1604	ev_clear_pending (EV_A_ (W)w);
		1605	if (expect_false (!ev_is_active (w)))
		1606	return;
		1607
		1608	{
		1609	int active = ((W)w)->active;
		1610	prepares [active - 1] = prepares [--preparecnt];
		1611	((W)prepares [active - 1])->active = active;
		1612	}
		1613
		1614	ev_stop (EV_A_ (W)w);
		1615	}
		1616
		1617	void
		1618	ev_check_start (EV_P_ ev_check *w)
		1619	{
		1620	if (expect_false (ev_is_active (w)))
		1621	return;
		1622
		1623	ev_start (EV_A_ (W)w, ++checkcnt);
		1624	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1625	checks [checkcnt - 1] = w;
		1626	}
		1627
		1628	void
		1629	ev_check_stop (EV_P_ ev_check *w)
		1630	{
		1631	ev_clear_pending (EV_A_ (W)w);
		1632	if (expect_false (!ev_is_active (w)))
		1633	return;
		1634
		1635	{
		1636	int active = ((W)w)->active;
		1637	checks [active - 1] = checks [--checkcnt];
		1638	((W)checks [active - 1])->active = active;
		1639	}
		1640
		1641	ev_stop (EV_A_ (W)w);
		1642	}
		1643
		1644	#ifndef SA_RESTART
		1645	# define SA_RESTART 0
		1646	#endif
		1647
		1648	void
830	evsignal_start (struct ev_signal *w)	1649	ev_signal_start (EV_P_ ev_signal *w)
831	{	1650	{
		1651	#if EV_MULTIPLICITY
		1652	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1653	#endif
832	if (ev_is_active (w))	1654	if (expect_false (ev_is_active (w)))
833	return;	1655	return;
834		1656
		1657	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1658
835	ev_start ((W)w, 1);	1659	ev_start (EV_A_ (W)w, 1);
836	array_needsize (signals, signalmax, w->signum, signals_init);	1660	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
837	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1661	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
838		1662
839	if (!w->next)	1663	if (!((WL)w)->next)
840	{	1664	{
		1665	#if _WIN32
		1666	signal (w->signum, sighandler);
		1667	#else
841	struct sigaction sa;	1668	struct sigaction sa;
842	sa.sa_handler = sighandler;	1669	sa.sa_handler = sighandler;
843	sigfillset (&sa.sa_mask);	1670	sigfillset (&sa.sa_mask);
844	sa.sa_flags = 0;	1671	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
845	sigaction (w->signum, &sa, 0);	1672	sigaction (w->signum, &sa, 0);
		1673	#endif
846	}	1674	}
847	}	1675	}
848		1676
849	void	1677	void
850	evsignal_stop (struct ev_signal *w)	1678	ev_signal_stop (EV_P_ ev_signal *w)
851	{	1679	{
852	ev_clear ((W)w);	1680	ev_clear_pending (EV_A_ (W)w);
853	if (!ev_is_active (w))	1681	if (expect_false (!ev_is_active (w)))
854	return;	1682	return;
855		1683
856	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1684	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
857	ev_stop ((W)w);	1685	ev_stop (EV_A_ (W)w);
858		1686
859	if (!signals [w->signum - 1].head)	1687	if (!signals [w->signum - 1].head)
860	signal (w->signum, SIG_DFL);	1688	signal (w->signum, SIG_DFL);
861	}	1689	}
862		1690
863	void evidle_start (struct ev_idle *w)	1691	void
864	{
865	if (ev_is_active (w))
866	return;
867
868	ev_start ((W)w, ++idlecnt);
869	array_needsize (idles, idlemax, idlecnt, );
870	idles [idlecnt - 1] = w;
871	}
872
873	void evidle_stop (struct ev_idle *w)
874	{
875	ev_clear ((W)w);
876	if (ev_is_active (w))
877	return;
878
879	idles [w->active - 1] = idles [--idlecnt];
880	ev_stop ((W)w);
881	}
882
883	void evprepare_start (struct ev_prepare *w)
884	{
885	if (ev_is_active (w))
886	return;
887
888	ev_start ((W)w, ++preparecnt);
889	array_needsize (prepares, preparemax, preparecnt, );
890	prepares [preparecnt - 1] = w;
891	}
892
893	void evprepare_stop (struct ev_prepare *w)
894	{
895	ev_clear ((W)w);
896	if (ev_is_active (w))
897	return;
898
899	prepares [w->active - 1] = prepares [--preparecnt];
900	ev_stop ((W)w);
901	}
902
903	void evcheck_start (struct ev_check *w)
904	{
905	if (ev_is_active (w))
906	return;
907
908	ev_start ((W)w, ++checkcnt);
909	array_needsize (checks, checkmax, checkcnt, );
910	checks [checkcnt - 1] = w;
911	}
912
913	void evcheck_stop (struct ev_check *w)
914	{
915	ev_clear ((W)w);
916	if (ev_is_active (w))
917	return;
918
919	checks [w->active - 1] = checks [--checkcnt];
920	ev_stop ((W)w);
921	}
922
923	void evchild_start (struct ev_child *w)	1692	ev_child_start (EV_P_ ev_child *w)
924	{	1693	{
		1694	#if EV_MULTIPLICITY
		1695	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1696	#endif
925	if (ev_is_active (w))	1697	if (expect_false (ev_is_active (w)))
926	return;	1698	return;
927		1699
928	ev_start ((W)w, 1);	1700	ev_start (EV_A_ (W)w, 1);
929	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1701	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
930	}	1702	}
931		1703
		1704	void
932	void evchild_stop (struct ev_child *w)	1705	ev_child_stop (EV_P_ ev_child *w)
933	{	1706	{
934	ev_clear ((W)w);	1707	ev_clear_pending (EV_A_ (W)w);
935	if (ev_is_active (w))	1708	if (expect_false (!ev_is_active (w)))
936	return;	1709	return;
937		1710
938	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1711	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
939	ev_stop ((W)w);	1712	ev_stop (EV_A_ (W)w);
940	}	1713	}
		1714
		1715	#if EV_EMBED_ENABLE
		1716	void noinline
		1717	ev_embed_sweep (EV_P_ ev_embed *w)
		1718	{
		1719	ev_loop (w->loop, EVLOOP_NONBLOCK);
		1720	}
		1721
		1722	static void
		1723	embed_cb (EV_P_ ev_io *io, int revents)
		1724	{
		1725	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		1726
		1727	if (ev_cb (w))
		1728	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		1729	else
		1730	ev_embed_sweep (loop, w);
		1731	}
		1732
		1733	void
		1734	ev_embed_start (EV_P_ ev_embed *w)
		1735	{
		1736	if (expect_false (ev_is_active (w)))
		1737	return;
		1738
		1739	{
		1740	struct ev_loop *loop = w->loop;
		1741	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		1742	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		1743	}
		1744
		1745	ev_set_priority (&w->io, ev_priority (w));
		1746	ev_io_start (EV_A_ &w->io);
		1747
		1748	ev_start (EV_A_ (W)w, 1);
		1749	}
		1750
		1751	void
		1752	ev_embed_stop (EV_P_ ev_embed *w)
		1753	{
		1754	ev_clear_pending (EV_A_ (W)w);
		1755	if (expect_false (!ev_is_active (w)))
		1756	return;
		1757
		1758	ev_io_stop (EV_A_ &w->io);
		1759
		1760	ev_stop (EV_A_ (W)w);
		1761	}
		1762	#endif
		1763
		1764	#if EV_STAT_ENABLE
		1765
		1766	# ifdef _WIN32
		1767	# define lstat(a,b) stat(a,b)
		1768	# endif
		1769
		1770	void
		1771	ev_stat_stat (EV_P_ ev_stat *w)
		1772	{
		1773	if (lstat (w->path, &w->attr) < 0)
		1774	w->attr.st_nlink = 0;
		1775	else if (!w->attr.st_nlink)
		1776	w->attr.st_nlink = 1;
		1777	}
		1778
		1779	static void
		1780	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1781	{
		1782	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		1783
		1784	/* we copy this here each the time so that */
		1785	/* prev has the old value when the callback gets invoked */
		1786	w->prev = w->attr;
		1787	ev_stat_stat (EV_A_ w);
		1788
		1789	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
		1790	ev_feed_event (EV_A_ w, EV_STAT);
		1791	}
		1792
		1793	void
		1794	ev_stat_start (EV_P_ ev_stat *w)
		1795	{
		1796	if (expect_false (ev_is_active (w)))
		1797	return;
		1798
		1799	/* since we use memcmp, we need to clear any padding data etc. */
		1800	memset (&w->prev, 0, sizeof (ev_statdata));
		1801	memset (&w->attr, 0, sizeof (ev_statdata));
		1802
		1803	ev_stat_stat (EV_A_ w);
		1804
		1805	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		1806	ev_set_priority (&w->timer, ev_priority (w));
		1807	ev_timer_start (EV_A_ &w->timer);
		1808
		1809	ev_start (EV_A_ (W)w, 1);
		1810	}
		1811
		1812	void
		1813	ev_stat_stop (EV_P_ ev_stat *w)
		1814	{
		1815	ev_clear_pending (EV_A_ (W)w);
		1816	if (expect_false (!ev_is_active (w)))
		1817	return;
		1818
		1819	ev_timer_stop (EV_A_ &w->timer);
		1820
		1821	ev_stop (EV_A_ (W)w);
		1822	}
		1823	#endif
941		1824
942	/*****************************************************************************/	1825	/*****************************************************************************/
943		1826
944	struct ev_once	1827	struct ev_once
945	{	1828	{
946	struct ev_io io;	1829	ev_io io;
947	struct ev_timer to;	1830	ev_timer to;
948	void (*cb)(int revents, void *arg);	1831	void (*cb)(int revents, void *arg);
949	void *arg;	1832	void *arg;
950	};	1833	};
951		1834
952	static void	1835	static void
953	once_cb (struct ev_once *once, int revents)	1836	once_cb (EV_P_ struct ev_once *once, int revents)
954	{	1837	{
955	void (*cb)(int revents, void *arg) = once->cb;	1838	void (*cb)(int revents, void *arg) = once->cb;
956	void *arg = once->arg;	1839	void *arg = once->arg;
957		1840
958	evio_stop (&once->io);	1841	ev_io_stop (EV_A_ &once->io);
959	evtimer_stop (&once->to);	1842	ev_timer_stop (EV_A_ &once->to);
960	free (once);	1843	ev_free (once);
961		1844
962	cb (revents, arg);	1845	cb (revents, arg);
963	}	1846	}
964		1847
965	static void	1848	static void
966	once_cb_io (struct ev_io *w, int revents)	1849	once_cb_io (EV_P_ ev_io *w, int revents)
967	{	1850	{
968	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1851	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
969	}	1852	}
970		1853
971	static void	1854	static void
972	once_cb_to (struct ev_timer *w, int revents)	1855	once_cb_to (EV_P_ ev_timer *w, int revents)
973	{	1856	{
974	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1857	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
975	}	1858	}
976		1859
977	void	1860	void
978	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1861	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
979	{	1862	{
980	struct ev_once *once = malloc (sizeof (struct ev_once));	1863	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
981		1864
982	if (!once)	1865	if (expect_false (!once))
983	cb (EV_ERROR, arg);	1866	{
984	else	1867	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1868	return;
985	{	1869	}
		1870
986	once->cb = cb;	1871	once->cb = cb;
987	once->arg = arg;	1872	once->arg = arg;
988		1873
989	evw_init (&once->io, once_cb_io);	1874	ev_init (&once->io, once_cb_io);
990
991	if (fd >= 0)	1875	if (fd >= 0)
992	{	1876	{
993	evio_set (&once->io, fd, events);	1877	ev_io_set (&once->io, fd, events);
994	evio_start (&once->io);	1878	ev_io_start (EV_A_ &once->io);
995	}	1879	}
996		1880
997	evw_init (&once->to, once_cb_to);	1881	ev_init (&once->to, once_cb_to);
998
999	if (timeout >= 0.)	1882	if (timeout >= 0.)
1000	{	1883	{
1001	evtimer_set (&once->to, timeout, 0.);	1884	ev_timer_set (&once->to, timeout, 0.);
1002	evtimer_start (&once->to);	1885	ev_timer_start (EV_A_ &once->to);
1003	}
1004	}
1005	}
1006
1007	/*****************************************************************************/
1008
1009	#if 0
1010
1011	struct ev_io wio;
1012
1013	static void
1014	sin_cb (struct ev_io *w, int revents)
1015	{
1016	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1017	}
1018
1019	static void
1020	ocb (struct ev_timer *w, int revents)
1021	{
1022	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1023	evtimer_stop (w);
1024	evtimer_start (w);
1025	}
1026
1027	static void
1028	scb (struct ev_signal *w, int revents)
1029	{
1030	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1031	evio_stop (&wio);
1032	evio_start (&wio);
1033	}
1034
1035	static void
1036	gcb (struct ev_signal *w, int revents)
1037	{
1038	fprintf (stderr, "generic %x\n", revents);
1039
1040	}
1041
1042	int main (void)
1043	{
1044	ev_init (0);
1045
1046	evio_init (&wio, sin_cb, 0, EV_READ);
1047	evio_start (&wio);
1048
1049	struct ev_timer t[10000];
1050
1051	#if 0
1052	int i;
1053	for (i = 0; i < 10000; ++i)
1054	{	1886	}
1055	struct ev_timer *w = t + i;
1056	evw_init (w, ocb, i);
1057	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1058	evtimer_start (w);
1059	if (drand48 () < 0.5)
1060	evtimer_stop (w);
1061	}
1062	#endif
1063
1064	struct ev_timer t1;
1065	evtimer_init (&t1, ocb, 5, 10);
1066	evtimer_start (&t1);
1067
1068	struct ev_signal sig;
1069	evsignal_init (&sig, scb, SIGQUIT);
1070	evsignal_start (&sig);
1071
1072	struct ev_check cw;
1073	evcheck_init (&cw, gcb);
1074	evcheck_start (&cw);
1075
1076	struct ev_idle iw;
1077	evidle_init (&iw, gcb);
1078	evidle_start (&iw);
1079
1080	ev_loop (0);
1081
1082	return 0;
1083	}	1887	}
1084		1888
		1889	#ifdef __cplusplus
		1890	}
1085	#endif	1891	#endif
1086		1892
1087
1088
1089

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines