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

Comparing libev/ev.c (file contents):
Revision 1.21 by root, Wed Oct 31 18:37:38 2007 UTC vs.
Revision 1.140 by root, Mon Nov 26 19:49:36 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_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
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? */
72	ev_tstamp ev_now;
73	int ev_method;
74		221
75	static int have_monotonic; /* runtime */	222	#ifdef _WIN32
76		223	# include "ev_win32.c"
77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	224	#endif
78	static void (*method_modify)(int fd, int oev, int nev);
79	static void (*method_poll)(ev_tstamp timeout);
80		225
81	/*****************************************************************************/	226	/*****************************************************************************/
82		227
83	ev_tstamp	228	static void (syserr_cb)(const char msg);
		229
		230	void ev_set_syserr_cb (void (cb)(const char msg))
		231	{
		232	syserr_cb = cb;
		233	}
		234
		235	static void
		236	syserr (const char *msg)
		237	{
		238	if (!msg)
		239	msg = "(libev) system error";
		240
		241	if (syserr_cb)
		242	syserr_cb (msg);
		243	else
		244	{
		245	perror (msg);
		246	abort ();
		247	}
		248	}
		249
		250	static void (alloc)(void *ptr, long size);
		251
		252	void ev_set_allocator (void (cb)(void *ptr, long size))
		253	{
		254	alloc = cb;
		255	}
		256
		257	static void *
		258	ev_realloc (void *ptr, long size)
		259	{
		260	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		261
		262	if (!ptr && size)
		263	{
		264	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		265	abort ();
		266	}
		267
		268	return ptr;
		269	}
		270
		271	#define ev_malloc(size) ev_realloc (0, (size))
		272	#define ev_free(ptr) ev_realloc ((ptr), 0)
		273
		274	/*****************************************************************************/
		275
		276	typedef struct
		277	{
		278	WL head;
		279	unsigned char events;
		280	unsigned char reify;
		281	#if EV_SELECT_IS_WINSOCKET
		282	SOCKET handle;
		283	#endif
		284	} ANFD;
		285
		286	typedef struct
		287	{
		288	W w;
		289	int events;
		290	} ANPENDING;
		291
		292	#if EV_MULTIPLICITY
		293
		294	struct ev_loop
		295	{
		296	ev_tstamp ev_rt_now;
		297	#define ev_rt_now ((loop)->ev_rt_now)
		298	#define VAR(name,decl) decl;
		299	#include "ev_vars.h"
		300	#undef VAR
		301	};
		302	#include "ev_wrap.h"
		303
		304	static struct ev_loop default_loop_struct;
		305	struct ev_loop *ev_default_loop_ptr;
		306
		307	#else
		308
		309	ev_tstamp ev_rt_now;
		310	#define VAR(name,decl) static decl;
		311	#include "ev_vars.h"
		312	#undef VAR
		313
		314	static int ev_default_loop_ptr;
		315
		316	#endif
		317
		318	/*****************************************************************************/
		319
		320	ev_tstamp noinline
84	ev_time (void)	321	ev_time (void)
85	{	322	{
86	#if HAVE_REALTIME	323	#if EV_USE_REALTIME
87	struct timespec ts;	324	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	325	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	326	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	327	#else
91	struct timeval tv;	328	struct timeval tv;
92	gettimeofday (&tv, 0);	329	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	330	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	331	#endif
95	}	332	}
96		333
97	static ev_tstamp	334	ev_tstamp inline_size
98	get_clock (void)	335	get_clock (void)
99	{	336	{
100	#if HAVE_MONOTONIC	337	#if EV_USE_MONOTONIC
101	if (have_monotonic)	338	if (expect_true (have_monotonic))
102	{	339	{
103	struct timespec ts;	340	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	341	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	342	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	343	}
107	#endif	344	#endif
108		345
109	return ev_time ();	346	return ev_time ();
110	}	347	}
111		348
		349	#if EV_MULTIPLICITY
		350	ev_tstamp
		351	ev_now (EV_P)
		352	{
		353	return ev_rt_now;
		354	}
		355	#endif
		356
		357	#define array_roundsize(type,n) (((n) \| 4) & ~3)
		358
112	#define array_needsize(base,cur,cnt,init) \	359	#define array_needsize(type,base,cur,cnt,init) \
113	if ((cnt) > cur) \	360	if (expect_false ((cnt) > cur)) \
114	{ \	361	{ \
115	int newcnt = cur ? cur << 1 : 16; \	362	int newcnt = cur; \
		363	do \
		364	{ \
		365	newcnt = array_roundsize (type, newcnt << 1); \
		366	} \
		367	while ((cnt) > newcnt); \
		368	\
116	base = realloc (base, sizeof (base) (newcnt)); \	369	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
117	init (base + cur, newcnt - cur); \	370	init (base + cur, newcnt - cur); \
118	cur = newcnt; \	371	cur = newcnt; \
119	}	372	}
		373
		374	#define array_slim(type,stem) \
		375	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		376	{ \
		377	stem ## max = array_roundsize (stem ## cnt >> 1); \
		378	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
		379	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		380	}
		381
		382	#define array_free(stem, idx) \
		383	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
120		384
121	/*****************************************************************************/	385	/*****************************************************************************/
122		386
		387	void inline_size
		388	anfds_init (ANFD *base, int count)
		389	{
		390	while (count--)
		391	{
		392	base->head = 0;
		393	base->events = EV_NONE;
		394	base->reify = 0;
		395
		396	++base;
		397	}
		398	}
		399
		400	void noinline
		401	ev_feed_event (EV_P_ void *w, int revents)
		402	{
		403	W w_ = (W)w;
		404
		405	if (expect_false (w_->pending))
		406	{
		407	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		408	return;
		409	}
		410
		411	w_->pending = ++pendingcnt [ABSPRI (w_)];
		412	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		413	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		414	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		415	}
		416
		417	static void
		418	queue_events (EV_P_ W *events, int eventcnt, int type)
		419	{
		420	int i;
		421
		422	for (i = 0; i < eventcnt; ++i)
		423	ev_feed_event (EV_A_ events [i], type);
		424	}
		425
		426	void inline_speed
		427	fd_event (EV_P_ int fd, int revents)
		428	{
		429	ANFD *anfd = anfds + fd;
		430	ev_io *w;
		431
		432	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
		433	{
		434	int ev = w->events & revents;
		435
		436	if (ev)
		437	ev_feed_event (EV_A_ (W)w, ev);
		438	}
		439	}
		440
		441	void
		442	ev_feed_fd_event (EV_P_ int fd, int revents)
		443	{
		444	fd_event (EV_A_ fd, revents);
		445	}
		446
		447	/*****************************************************************************/
		448
		449	void inline_size
		450	fd_reify (EV_P)
		451	{
		452	int i;
		453
		454	for (i = 0; i < fdchangecnt; ++i)
		455	{
		456	int fd = fdchanges [i];
		457	ANFD *anfd = anfds + fd;
		458	ev_io *w;
		459
		460	int events = 0;
		461
		462	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
		463	events \|= w->events;
		464
		465	#if EV_SELECT_IS_WINSOCKET
		466	if (events)
		467	{
		468	unsigned long argp;
		469	anfd->handle = _get_osfhandle (fd);
		470	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		471	}
		472	#endif
		473
		474	anfd->reify = 0;
		475
		476	backend_modify (EV_A_ fd, anfd->events, events);
		477	anfd->events = events;
		478	}
		479
		480	fdchangecnt = 0;
		481	}
		482
		483	void inline_size
		484	fd_change (EV_P_ int fd)
		485	{
		486	if (expect_false (anfds [fd].reify))
		487	return;
		488
		489	anfds [fd].reify = 1;
		490
		491	++fdchangecnt;
		492	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		493	fdchanges [fdchangecnt - 1] = fd;
		494	}
		495
		496	void inline_speed
		497	fd_kill (EV_P_ int fd)
		498	{
		499	ev_io *w;
		500
		501	while ((w = (ev_io *)anfds [fd].head))
		502	{
		503	ev_io_stop (EV_A_ w);
		504	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		505	}
		506	}
		507
		508	int inline_size
		509	fd_valid (int fd)
		510	{
		511	#ifdef _WIN32
		512	return _get_osfhandle (fd) != -1;
		513	#else
		514	return fcntl (fd, F_GETFD) != -1;
		515	#endif
		516	}
		517
		518	/* called on EBADF to verify fds */
		519	static void noinline
		520	fd_ebadf (EV_P)
		521	{
		522	int fd;
		523
		524	for (fd = 0; fd < anfdmax; ++fd)
		525	if (anfds [fd].events)
		526	if (!fd_valid (fd) == -1 && errno == EBADF)
		527	fd_kill (EV_A_ fd);
		528	}
		529
		530	/* called on ENOMEM in select/poll to kill some fds and retry */
		531	static void noinline
		532	fd_enomem (EV_P)
		533	{
		534	int fd;
		535
		536	for (fd = anfdmax; fd--; )
		537	if (anfds [fd].events)
		538	{
		539	fd_kill (EV_A_ fd);
		540	return;
		541	}
		542	}
		543
		544	/* usually called after fork if backend needs to re-arm all fds from scratch */
		545	static void noinline
		546	fd_rearm_all (EV_P)
		547	{
		548	int fd;
		549
		550	/* this should be highly optimised to not do anything but set a flag */
		551	for (fd = 0; fd < anfdmax; ++fd)
		552	if (anfds [fd].events)
		553	{
		554	anfds [fd].events = 0;
		555	fd_change (EV_A_ fd);
		556	}
		557	}
		558
		559	/*****************************************************************************/
		560
		561	void inline_speed
		562	upheap (WT *heap, int k)
		563	{
		564	WT w = heap [k];
		565
		566	while (k && heap [k >> 1]->at > w->at)
		567	{
		568	heap [k] = heap [k >> 1];
		569	((W)heap [k])->active = k + 1;
		570	k >>= 1;
		571	}
		572
		573	heap [k] = w;
		574	((W)heap [k])->active = k + 1;
		575
		576	}
		577
		578	void inline_speed
		579	downheap (WT *heap, int N, int k)
		580	{
		581	WT w = heap [k];
		582
		583	while (k < (N >> 1))
		584	{
		585	int j = k << 1;
		586
		587	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		588	++j;
		589
		590	if (w->at <= heap [j]->at)
		591	break;
		592
		593	heap [k] = heap [j];
		594	((W)heap [k])->active = k + 1;
		595	k = j;
		596	}
		597
		598	heap [k] = w;
		599	((W)heap [k])->active = k + 1;
		600	}
		601
		602	void inline_size
		603	adjustheap (WT *heap, int N, int k)
		604	{
		605	upheap (heap, k);
		606	downheap (heap, N, k);
		607	}
		608
		609	/*****************************************************************************/
		610
123	typedef struct	611	typedef struct
124	{	612	{
125	struct ev_io *head;	613	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;	614	sig_atomic_t volatile gotsig;
259	} ANSIG;	615	} ANSIG;
260		616
261	static ANSIG *signals;	617	static ANSIG *signals;
262	static int signalmax;	618	static int signalmax;
263		619
264	static int sigpipe [2];	620	static int sigpipe [2];
265	static sig_atomic_t gotsig;	621	static sig_atomic_t volatile gotsig;
266	static struct ev_io sigev;	622	static ev_io sigev;
267		623
268	static void	624	void inline_size
269	signals_init (ANSIG *base, int count)	625	signals_init (ANSIG *base, int count)
270	{	626	{
271	while (count--)	627	while (count--)
272	{	628	{
273	base->head = 0;	629	base->head = 0;
274	base->gotsig = 0;	630	base->gotsig = 0;
		631
275	++base;	632	++base;
276	}	633	}
277	}	634	}
278		635
279	static void	636	static void
280	sighandler (int signum)	637	sighandler (int signum)
281	{	638	{
		639	#if _WIN32
		640	signal (signum, sighandler);
		641	#endif
		642
282	signals [signum - 1].gotsig = 1;	643	signals [signum - 1].gotsig = 1;
283		644
284	if (!gotsig)	645	if (!gotsig)
285	{	646	{
		647	int old_errno = errno;
286	gotsig = 1;	648	gotsig = 1;
287	write (sigpipe [1], &gotsig, 1);	649	write (sigpipe [1], &signum, 1);
		650	errno = old_errno;
288	}	651	}
		652	}
		653
		654	void noinline
		655	ev_feed_signal_event (EV_P_ int signum)
		656	{
		657	WL w;
		658
		659	#if EV_MULTIPLICITY
		660	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		661	#endif
		662
		663	--signum;
		664
		665	if (signum < 0 \|\| signum >= signalmax)
		666	return;
		667
		668	signals [signum].gotsig = 0;
		669
		670	for (w = signals [signum].head; w; w = w->next)
		671	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
289	}	672	}
290		673
291	static void	674	static void
292	sigcb (struct ev_io *iow, int revents)	675	sigcb (EV_P_ ev_io *iow, int revents)
293	{	676	{
294	struct ev_signal *w;
295	int sig;	677	int signum;
296		678
		679	read (sigpipe [0], &revents, 1);
297	gotsig = 0;	680	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299		681
300	for (sig = signalmax; sig--; )	682	for (signum = signalmax; signum--; )
301	if (signals [sig].gotsig)	683	if (signals [signum].gotsig)
		684	ev_feed_signal_event (EV_A_ signum + 1);
		685	}
		686
		687	void inline_size
		688	fd_intern (int fd)
		689	{
		690	#ifdef _WIN32
		691	int arg = 1;
		692	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		693	#else
		694	fcntl (fd, F_SETFD, FD_CLOEXEC);
		695	fcntl (fd, F_SETFL, O_NONBLOCK);
		696	#endif
		697	}
		698
		699	static void noinline
		700	siginit (EV_P)
		701	{
		702	fd_intern (sigpipe [0]);
		703	fd_intern (sigpipe [1]);
		704
		705	ev_io_set (&sigev, sigpipe [0], EV_READ);
		706	ev_io_start (EV_A_ &sigev);
		707	ev_unref (EV_A); /* child watcher should not keep loop alive */
		708	}
		709
		710	/*****************************************************************************/
		711
		712	static ev_child *childs [PID_HASHSIZE];
		713
		714	#ifndef _WIN32
		715
		716	static ev_signal childev;
		717
		718	#ifndef WCONTINUED
		719	# define WCONTINUED 0
		720	#endif
		721
		722	void inline_speed
		723	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		724	{
		725	ev_child *w;
		726
		727	for (w = (ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)
		728	if (w->pid == pid \|\| !w->pid)
302	{	729	{
303	signals [sig].gotsig = 0;	730	ev_priority (w) = ev_priority (sw); /* need to do it now */
304		731	w->rpid = pid;
305	for (w = signals [sig].head; w; w = w->next)	732	w->rstatus = status;
306	event ((W)w, EV_SIGNAL);	733	ev_feed_event (EV_A_ (W)w, EV_CHILD);
307	}	734	}
308	}	735	}
309		736
310	static void	737	static void
311	siginit (void)	738	childcb (EV_P_ ev_signal *sw, int revents)
312	{	739	{
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	740	int pid, status;
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315		741
316	/* rather than sort out wether we really need nb, set it */	742	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	743	{
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	744	/* make sure we are called again until all childs have been reaped */
		745	/* we need to do it this way so that the callback gets called before we continue */
		746	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
319		747
320	evio_set (&sigev, sigpipe [0], EV_READ);	748	child_reap (EV_A_ sw, pid, pid, status);
321	evio_start (&sigev);	749	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		750	}
322	}	751	}
		752
		753	#endif
323		754
324	/*****************************************************************************/	755	/*****************************************************************************/
325		756
326	static struct ev_idle **idles;	757	#if EV_USE_PORT
327	static int idlemax, idlecnt;	758	# include "ev_port.c"
		759	#endif
		760	#if EV_USE_KQUEUE
		761	# include "ev_kqueue.c"
		762	#endif
		763	#if EV_USE_EPOLL
		764	# include "ev_epoll.c"
		765	#endif
		766	#if EV_USE_POLL
		767	# include "ev_poll.c"
		768	#endif
		769	#if EV_USE_SELECT
		770	# include "ev_select.c"
		771	#endif
328		772
329	static struct ev_prepare **prepares;	773	int
330	static int preparemax, preparecnt;	774	ev_version_major (void)
		775	{
		776	return EV_VERSION_MAJOR;
		777	}
331		778
332	static struct ev_check **checks;	779	int
333	static int checkmax, checkcnt;	780	ev_version_minor (void)
		781	{
		782	return EV_VERSION_MINOR;
		783	}
		784
		785	/* return true if we are running with elevated privileges and should ignore env variables */
		786	int inline_size
		787	enable_secure (void)
		788	{
		789	#ifdef _WIN32
		790	return 0;
		791	#else
		792	return getuid () != geteuid ()
		793	\|\| getgid () != getegid ();
		794	#endif
		795	}
		796
		797	unsigned int
		798	ev_supported_backends (void)
		799	{
		800	unsigned int flags = 0;
		801
		802	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
		803	if (EV_USE_KQUEUE) flags \|= EVBACKEND_KQUEUE;
		804	if (EV_USE_EPOLL ) flags \|= EVBACKEND_EPOLL;
		805	if (EV_USE_POLL ) flags \|= EVBACKEND_POLL;
		806	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
		807
		808	return flags;
		809	}
		810
		811	unsigned int
		812	ev_recommended_backends (void)
		813	{
		814	unsigned int flags = ev_supported_backends ();
		815
		816	#ifndef __NetBSD__
		817	/* kqueue is borked on everything but netbsd apparently */
		818	/* it usually doesn't work correctly on anything but sockets and pipes */
		819	flags &= ~EVBACKEND_KQUEUE;
		820	#endif
		821	#ifdef __APPLE__
		822	// flags &= ~EVBACKEND_KQUEUE; for documentation
		823	flags &= ~EVBACKEND_POLL;
		824	#endif
		825
		826	return flags;
		827	}
		828
		829	unsigned int
		830	ev_embeddable_backends (void)
		831	{
		832	return EVBACKEND_EPOLL
		833	\| EVBACKEND_KQUEUE
		834	\| EVBACKEND_PORT;
		835	}
		836
		837	unsigned int
		838	ev_backend (EV_P)
		839	{
		840	return backend;
		841	}
		842
		843	static void
		844	loop_init (EV_P_ unsigned int flags)
		845	{
		846	if (!backend)
		847	{
		848	#if EV_USE_MONOTONIC
		849	{
		850	struct timespec ts;
		851	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		852	have_monotonic = 1;
		853	}
		854	#endif
		855
		856	ev_rt_now = ev_time ();
		857	mn_now = get_clock ();
		858	now_floor = mn_now;
		859	rtmn_diff = ev_rt_now - mn_now;
		860
		861	if (!(flags & EVFLAG_NOENV)
		862	&& !enable_secure ()
		863	&& getenv ("LIBEV_FLAGS"))
		864	flags = atoi (getenv ("LIBEV_FLAGS"));
		865
		866	if (!(flags & 0x0000ffffUL))
		867	flags \|= ev_recommended_backends ();
		868
		869	backend = 0;
		870	#if EV_USE_PORT
		871	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		872	#endif
		873	#if EV_USE_KQUEUE
		874	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		875	#endif
		876	#if EV_USE_EPOLL
		877	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		878	#endif
		879	#if EV_USE_POLL
		880	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		881	#endif
		882	#if EV_USE_SELECT
		883	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		884	#endif
		885
		886	ev_init (&sigev, sigcb);
		887	ev_set_priority (&sigev, EV_MAXPRI);
		888	}
		889	}
		890
		891	static void
		892	loop_destroy (EV_P)
		893	{
		894	int i;
		895
		896	#if EV_USE_PORT
		897	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		898	#endif
		899	#if EV_USE_KQUEUE
		900	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		901	#endif
		902	#if EV_USE_EPOLL
		903	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		904	#endif
		905	#if EV_USE_POLL
		906	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		907	#endif
		908	#if EV_USE_SELECT
		909	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		910	#endif
		911
		912	for (i = NUMPRI; i--; )
		913	array_free (pending, [i]);
		914
		915	/* have to use the microsoft-never-gets-it-right macro */
		916	array_free (fdchange, EMPTY0);
		917	array_free (timer, EMPTY0);
		918	#if EV_PERIODIC_ENABLE
		919	array_free (periodic, EMPTY0);
		920	#endif
		921	array_free (idle, EMPTY0);
		922	array_free (prepare, EMPTY0);
		923	array_free (check, EMPTY0);
		924
		925	backend = 0;
		926	}
		927
		928	static void
		929	loop_fork (EV_P)
		930	{
		931	#if EV_USE_PORT
		932	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		933	#endif
		934	#if EV_USE_KQUEUE
		935	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		936	#endif
		937	#if EV_USE_EPOLL
		938	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		939	#endif
		940
		941	if (ev_is_active (&sigev))
		942	{
		943	/* default loop */
		944
		945	ev_ref (EV_A);
		946	ev_io_stop (EV_A_ &sigev);
		947	close (sigpipe [0]);
		948	close (sigpipe [1]);
		949
		950	while (pipe (sigpipe))
		951	syserr ("(libev) error creating pipe");
		952
		953	siginit (EV_A);
		954	}
		955
		956	postfork = 0;
		957	}
		958
		959	#if EV_MULTIPLICITY
		960	struct ev_loop *
		961	ev_loop_new (unsigned int flags)
		962	{
		963	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		964
		965	memset (loop, 0, sizeof (struct ev_loop));
		966
		967	loop_init (EV_A_ flags);
		968
		969	if (ev_backend (EV_A))
		970	return loop;
		971
		972	return 0;
		973	}
		974
		975	void
		976	ev_loop_destroy (EV_P)
		977	{
		978	loop_destroy (EV_A);
		979	ev_free (loop);
		980	}
		981
		982	void
		983	ev_loop_fork (EV_P)
		984	{
		985	postfork = 1;
		986	}
		987
		988	#endif
		989
		990	#if EV_MULTIPLICITY
		991	struct ev_loop *
		992	ev_default_loop_init (unsigned int flags)
		993	#else
		994	int
		995	ev_default_loop (unsigned int flags)
		996	#endif
		997	{
		998	if (sigpipe [0] == sigpipe [1])
		999	if (pipe (sigpipe))
		1000	return 0;
		1001
		1002	if (!ev_default_loop_ptr)
		1003	{
		1004	#if EV_MULTIPLICITY
		1005	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1006	#else
		1007	ev_default_loop_ptr = 1;
		1008	#endif
		1009
		1010	loop_init (EV_A_ flags);
		1011
		1012	if (ev_backend (EV_A))
		1013	{
		1014	siginit (EV_A);
		1015
		1016	#ifndef _WIN32
		1017	ev_signal_init (&childev, childcb, SIGCHLD);
		1018	ev_set_priority (&childev, EV_MAXPRI);
		1019	ev_signal_start (EV_A_ &childev);
		1020	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1021	#endif
		1022	}
		1023	else
		1024	ev_default_loop_ptr = 0;
		1025	}
		1026
		1027	return ev_default_loop_ptr;
		1028	}
		1029
		1030	void
		1031	ev_default_destroy (void)
		1032	{
		1033	#if EV_MULTIPLICITY
		1034	struct ev_loop *loop = ev_default_loop_ptr;
		1035	#endif
		1036
		1037	#ifndef _WIN32
		1038	ev_ref (EV_A); /* child watcher */
		1039	ev_signal_stop (EV_A_ &childev);
		1040	#endif
		1041
		1042	ev_ref (EV_A); /* signal watcher */
		1043	ev_io_stop (EV_A_ &sigev);
		1044
		1045	close (sigpipe [0]); sigpipe [0] = 0;
		1046	close (sigpipe [1]); sigpipe [1] = 0;
		1047
		1048	loop_destroy (EV_A);
		1049	}
		1050
		1051	void
		1052	ev_default_fork (void)
		1053	{
		1054	#if EV_MULTIPLICITY
		1055	struct ev_loop *loop = ev_default_loop_ptr;
		1056	#endif
		1057
		1058	if (backend)
		1059	postfork = 1;
		1060	}
334		1061
335	/*****************************************************************************/	1062	/*****************************************************************************/
336		1063
337	#if HAVE_EPOLL	1064	int inline_size
338	# include "ev_epoll.c"	1065	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	{	1066	{
346	#if HAVE_MONOTONIC	1067	int pri;
347	{
348	struct timespec ts;
349	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
350	have_monotonic = 1;
351	}
352	#endif
353		1068
354	ev_now = ev_time ();	1069	for (pri = NUMPRI; pri--; )
355	now = get_clock ();	1070	if (pendingcnt [pri])
356	diff = ev_now - now;	1071	return 1;
357		1072
358	if (pipe (sigpipe))
359	return 0;	1073	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	}	1074	}
377		1075
378	/*****************************************************************************/	1076	void inline_speed
379		1077	call_pending (EV_P)
380	void ev_prefork (void)
381	{	1078	{
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;	1079	int pri;
410		1080
411	for (i = 0; i < fdchangecnt; ++i)	1081	for (pri = NUMPRI; pri--; )
		1082	while (pendingcnt [pri])
412	{	1083	{
413	int fd = fdchanges [i];	1084	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
414	ANFD *anfd = anfds + fd;
415	struct ev_io *w;
416		1085
417	int wev = 0;	1086	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	{	1087	{
424	method_modify (fd, anfd->wev, wev);	1088	assert (("non-pending watcher on pending list", p->w->pending));
425	anfd->wev = wev;
426	}
427	}
428		1089
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;	1090	p->w->pending = 0;
442	p->w->cb (p->w, p->events);	1091	EV_CB_INVOKE (p->w, p->events);
443	}	1092	}
444	}	1093	}
445	}	1094	}
446		1095
447	static void	1096	void inline_size
448	timers_reify ()	1097	timers_reify (EV_P)
449	{	1098	{
450	while (timercnt && timers [0]->at <= now)	1099	while (timercnt && ((WT)timers [0])->at <= mn_now)
451	{	1100	{
452	struct ev_timer *w = timers [0];	1101	ev_timer *w = timers [0];
453		1102
454	event ((W)w, EV_TIMEOUT);	1103	assert (("inactive timer on timer heap detected", ev_is_active (w)));
455		1104
456	/* first reschedule or stop timer */	1105	/* first reschedule or stop timer */
457	if (w->repeat)	1106	if (w->repeat)
458	{	1107	{
		1108	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1109
459	w->at = now + w->repeat;	1110	((WT)w)->at += w->repeat;
460	assert (("timer timeout in the past, negative repeat?", w->at > now));	1111	if (((WT)w)->at < mn_now)
		1112	((WT)w)->at = mn_now;
		1113
461	downheap ((WT *)timers, timercnt, 0);	1114	downheap ((WT *)timers, timercnt, 0);
462	}	1115	}
463	else	1116	else
464	evtimer_stop (w); /* nonrepeating: stop timer */	1117	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
465	}
466	}
467		1118
468	static void	1119	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1120	}
		1121	}
		1122
		1123	#if EV_PERIODIC_ENABLE
		1124	void inline_size
469	periodics_reify ()	1125	periodics_reify (EV_P)
470	{	1126	{
471	while (periodiccnt && periodics [0]->at <= ev_now)	1127	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
472	{	1128	{
473	struct ev_periodic *w = periodics [0];	1129	ev_periodic *w = periodics [0];
		1130
		1131	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
474		1132
475	/* first reschedule or stop timer */	1133	/* first reschedule or stop timer */
476	if (w->interval)	1134	if (w->reschedule_cb)
477	{	1135	{
		1136	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1137	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1138	downheap ((WT *)periodics, periodiccnt, 0);
		1139	}
		1140	else if (w->interval)
		1141	{
478	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1142	((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));	1143	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);	1144	downheap ((WT *)periodics, periodiccnt, 0);
481	}	1145	}
482	else	1146	else
483	evperiodic_stop (w); /* nonrepeating: stop timer */	1147	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
484		1148
485	event ((W)w, EV_TIMEOUT);	1149	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
486	}	1150	}
487	}	1151	}
488		1152
489	static void	1153	static void noinline
490	periodics_reschedule (ev_tstamp diff)	1154	periodics_reschedule (EV_P)
491	{	1155	{
492	int i;	1156	int i;
493		1157
494	/* adjust periodics after time jump */	1158	/* adjust periodics after time jump */
495	for (i = 0; i < periodiccnt; ++i)	1159	for (i = 0; i < periodiccnt; ++i)
496	{	1160	{
497	struct ev_periodic *w = periodics [i];	1161	ev_periodic *w = periodics [i];
498		1162
		1163	if (w->reschedule_cb)
		1164	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
499	if (w->interval)	1165	else if (w->interval)
		1166	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1167	}
		1168
		1169	/* now rebuild the heap */
		1170	for (i = periodiccnt >> 1; i--; )
		1171	downheap ((WT *)periodics, periodiccnt, i);
		1172	}
		1173	#endif
		1174
		1175	int inline_size
		1176	time_update_monotonic (EV_P)
		1177	{
		1178	mn_now = get_clock ();
		1179
		1180	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1181	{
		1182	ev_rt_now = rtmn_diff + mn_now;
		1183	return 0;
		1184	}
		1185	else
		1186	{
		1187	now_floor = mn_now;
		1188	ev_rt_now = ev_time ();
		1189	return 1;
		1190	}
		1191	}
		1192
		1193	void inline_size
		1194	time_update (EV_P)
		1195	{
		1196	int i;
		1197
		1198	#if EV_USE_MONOTONIC
		1199	if (expect_true (have_monotonic))
		1200	{
		1201	if (time_update_monotonic (EV_A))
500	{	1202	{
501	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1203	ev_tstamp odiff = rtmn_diff;
502		1204
503	if (fabs (diff) >= 1e-4)	1205	/* loop a few times, before making important decisions.
		1206	* on the choice of "4": one iteration isn't enough,
		1207	* in case we get preempted during the calls to
		1208	* ev_time and get_clock. a second call is almost guarenteed
		1209	* to succeed in that case, though. and looping a few more times
		1210	* doesn't hurt either as we only do this on time-jumps or
		1211	* in the unlikely event of getting preempted here.
		1212	*/
		1213	for (i = 4; --i; )
504	{	1214	{
505	evperiodic_stop (w);	1215	rtmn_diff = ev_rt_now - mn_now;
506	evperiodic_start (w);
507		1216
508	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1217	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1218	return; /* all is well */
		1219
		1220	ev_rt_now = ev_time ();
		1221	mn_now = get_clock ();
		1222	now_floor = mn_now;
509	}	1223	}
		1224
		1225	# if EV_PERIODIC_ENABLE
		1226	periodics_reschedule (EV_A);
		1227	# endif
		1228	/* no timer adjustment, as the monotonic clock doesn't jump */
		1229	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
510	}	1230	}
511	}	1231	}
512	}	1232	else
513		1233	#endif
514	static void	1234	{
515	time_update ()
516	{
517	int i;
518
519	ev_now = ev_time ();	1235	ev_rt_now = ev_time ();
520		1236
521	if (have_monotonic)	1237	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	{	1238	{
527	now = get_clock ();	1239	#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);	1240	periodics_reschedule (EV_A);
		1241	#endif
544		1242
545	/* adjust timers. this is easy, as the offset is the same for all */	1243	/* adjust timers. this is easy, as the offset is the same for all */
546	for (i = 0; i < timercnt; ++i)	1244	for (i = 0; i < timercnt; ++i)
547	timers [i]->at += diff;	1245	((WT)timers [i])->at += ev_rt_now - mn_now;
548	}	1246	}
549		1247
550	now = ev_now;	1248	mn_now = ev_rt_now;
551	}	1249	}
552	}	1250	}
553		1251
554	int ev_loop_done;	1252	void
		1253	ev_ref (EV_P)
		1254	{
		1255	++activecnt;
		1256	}
555		1257
		1258	void
		1259	ev_unref (EV_P)
		1260	{
		1261	--activecnt;
		1262	}
		1263
		1264	static int loop_done;
		1265
		1266	void
556	void ev_loop (int flags)	1267	ev_loop (EV_P_ int flags)
557	{	1268	{
558	double block;	1269	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)
559	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1270	? EVUNLOOP_ONE
		1271	: EVUNLOOP_CANCEL;
560		1272
561	do	1273	while (activecnt)
562	{	1274	{
563	/* queue check watchers (and execute them) */	1275	/* queue check watchers (and execute them) */
564	if (preparecnt)	1276	if (expect_false (preparecnt))
565	{	1277	{
566	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1278	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
567	call_pending ();	1279	call_pending (EV_A);
568	}	1280	}
569		1281
		1282	/* we might have forked, so reify kernel state if necessary */
		1283	if (expect_false (postfork))
		1284	loop_fork (EV_A);
		1285
570	/* update fd-related kernel structures */	1286	/* update fd-related kernel structures */
571	fd_reify ();	1287	fd_reify (EV_A);
572		1288
573	/* calculate blocking time */	1289	/* calculate blocking time */
		1290	{
		1291	double block;
574		1292
575	/* we only need this for !monotonic clockor timers, but as we basically
576	always have timers, we just calculate it always */
577	ev_now = ev_time ();
578
579	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1293	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
580	block = 0.;	1294	block = 0.; /* do not block at all */
581	else	1295	else
582	{	1296	{
		1297	/* update time to cancel out callback processing overhead */
		1298	#if EV_USE_MONOTONIC
		1299	if (expect_true (have_monotonic))
		1300	time_update_monotonic (EV_A);
		1301	else
		1302	#endif
		1303	{
		1304	ev_rt_now = ev_time ();
		1305	mn_now = ev_rt_now;
		1306	}
		1307
583	block = MAX_BLOCKTIME;	1308	block = MAX_BLOCKTIME;
584		1309
585	if (timercnt)	1310	if (timercnt)
586	{	1311	{
587	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1312	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
588	if (block > to) block = to;	1313	if (block > to) block = to;
589	}	1314	}
590		1315
		1316	#if EV_PERIODIC_ENABLE
591	if (periodiccnt)	1317	if (periodiccnt)
592	{	1318	{
593	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1319	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
594	if (block > to) block = to;	1320	if (block > to) block = to;
595	}	1321	}
		1322	#endif
596		1323
597	if (block < 0.) block = 0.;	1324	if (expect_false (block < 0.)) block = 0.;
598	}	1325	}
599		1326
600	method_poll (block);	1327	backend_poll (EV_A_ block);
		1328	}
601		1329
602	/* update ev_now, do magic */	1330	/* update ev_rt_now, do magic */
603	time_update ();	1331	time_update (EV_A);
604		1332
605	/* queue pending timers and reschedule them */	1333	/* queue pending timers and reschedule them */
606	timers_reify (); /* relative timers called last */	1334	timers_reify (EV_A); /* relative timers called last */
		1335	#if EV_PERIODIC_ENABLE
607	periodics_reify (); /* absolute timers called first */	1336	periodics_reify (EV_A); /* absolute timers called first */
		1337	#endif
608		1338
609	/* queue idle watchers unless io or timers are pending */	1339	/* queue idle watchers unless other events are pending */
610	if (!pendingcnt)	1340	if (idlecnt && !any_pending (EV_A))
611	queue_events ((W *)idles, idlecnt, EV_IDLE);	1341	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
612		1342
613	/* queue check watchers, to be executed first */	1343	/* queue check watchers, to be executed first */
614	if (checkcnt)	1344	if (expect_false (checkcnt))
615	queue_events ((W *)checks, checkcnt, EV_CHECK);	1345	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
616		1346
617	call_pending ();	1347	call_pending (EV_A);
618	}
619	while (!ev_loop_done);
620		1348
621	if (ev_loop_done != 2)	1349	if (expect_false (loop_done))
		1350	break;
		1351	}
		1352
		1353	if (loop_done == EVUNLOOP_ONE)
		1354	loop_done = EVUNLOOP_CANCEL;
		1355	}
		1356
		1357	void
		1358	ev_unloop (EV_P_ int how)
		1359	{
622	ev_loop_done = 0;	1360	loop_done = how;
623	}	1361	}
624		1362
625	/*****************************************************************************/	1363	/*****************************************************************************/
626		1364
627	static void	1365	void inline_size
628	wlist_add (WL *head, WL elem)	1366	wlist_add (WL *head, WL elem)
629	{	1367	{
630	elem->next = *head;	1368	elem->next = *head;
631	*head = elem;	1369	*head = elem;
632	}	1370	}
633		1371
634	static void	1372	void inline_size
635	wlist_del (WL *head, WL elem)	1373	wlist_del (WL *head, WL elem)
636	{	1374	{
637	while (*head)	1375	while (*head)
638	{	1376	{
639	if (*head == elem)	1377	if (*head == elem)
…		…
644		1382
645	head = &(*head)->next;	1383	head = &(*head)->next;
646	}	1384	}
647	}	1385	}
648		1386
649	static void	1387	void inline_speed
650	ev_clear (W w)	1388	ev_clear_pending (EV_P_ W w)
651	{	1389	{
652	if (w->pending)	1390	if (w->pending)
653	{	1391	{
654	pendings [w->pending - 1].w = 0;	1392	pendings [ABSPRI (w)][w->pending - 1].w = 0;
655	w->pending = 0;	1393	w->pending = 0;
656	}	1394	}
657	}	1395	}
658		1396
659	static void	1397	void inline_speed
660	ev_start (W w, int active)	1398	ev_start (EV_P_ W w, int active)
661	{	1399	{
		1400	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1401	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1402
662	w->active = active;	1403	w->active = active;
		1404	ev_ref (EV_A);
663	}	1405	}
664		1406
665	static void	1407	void inline_size
666	ev_stop (W w)	1408	ev_stop (EV_P_ W w)
667	{	1409	{
		1410	ev_unref (EV_A);
668	w->active = 0;	1411	w->active = 0;
669	}	1412	}
670		1413
671	/*****************************************************************************/	1414	/*****************************************************************************/
672		1415
673	void	1416	void
674	evio_start (struct ev_io *w)	1417	ev_io_start (EV_P_ ev_io *w)
675	{	1418	{
676	if (ev_is_active (w))
677	return;
678
679	int fd = w->fd;	1419	int fd = w->fd;
680		1420
		1421	if (expect_false (ev_is_active (w)))
		1422	return;
		1423
		1424	assert (("ev_io_start called with negative fd", fd >= 0));
		1425
681	ev_start ((W)w, 1);	1426	ev_start (EV_A_ (W)w, 1);
682	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1427	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
683	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1428	wlist_add ((WL *)&anfds[fd].head, (WL)w);
684		1429
685	++fdchangecnt;	1430	fd_change (EV_A_ fd);
686	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
687	fdchanges [fdchangecnt - 1] = fd;
688	}	1431	}
689		1432
690	void	1433	void
691	evio_stop (struct ev_io *w)	1434	ev_io_stop (EV_P_ ev_io *w)
692	{	1435	{
693	ev_clear ((W)w);	1436	ev_clear_pending (EV_A_ (W)w);
694	if (!ev_is_active (w))	1437	if (expect_false (!ev_is_active (w)))
695	return;	1438	return;
		1439
		1440	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
696		1441
697	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1442	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
698	ev_stop ((W)w);	1443	ev_stop (EV_A_ (W)w);
699		1444
700	++fdchangecnt;	1445	fd_change (EV_A_ w->fd);
701	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
702	fdchanges [fdchangecnt - 1] = w->fd;
703	}	1446	}
704		1447
705	void	1448	void
706	evtimer_start (struct ev_timer *w)	1449	ev_timer_start (EV_P_ ev_timer *w)
707	{	1450	{
708	if (ev_is_active (w))	1451	if (expect_false (ev_is_active (w)))
709	return;	1452	return;
710		1453
711	w->at += now;	1454	((WT)w)->at += mn_now;
712		1455
713	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1456	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
714		1457
715	ev_start ((W)w, ++timercnt);	1458	ev_start (EV_A_ (W)w, ++timercnt);
716	array_needsize (timers, timermax, timercnt, );	1459	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
717	timers [timercnt - 1] = w;	1460	timers [timercnt - 1] = w;
718	upheap ((WT *)timers, timercnt - 1);	1461	upheap ((WT *)timers, timercnt - 1);
719	}
720		1462
		1463	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1464	}
		1465
721	void	1466	void
722	evtimer_stop (struct ev_timer *w)	1467	ev_timer_stop (EV_P_ ev_timer *w)
723	{	1468	{
724	ev_clear ((W)w);	1469	ev_clear_pending (EV_A_ (W)w);
725	if (!ev_is_active (w))	1470	if (expect_false (!ev_is_active (w)))
726	return;	1471	return;
727		1472
		1473	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1474
728	if (w->active < timercnt--)	1475	if (expect_true (((W)w)->active < timercnt--))
729	{	1476	{
730	timers [w->active - 1] = timers [timercnt];	1477	timers [((W)w)->active - 1] = timers [timercnt];
731	downheap ((WT *)timers, timercnt, w->active - 1);	1478	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
732	}	1479	}
733		1480
734	w->at = w->repeat;	1481	((WT)w)->at -= mn_now;
735		1482
736	ev_stop ((W)w);	1483	ev_stop (EV_A_ (W)w);
737	}	1484	}
738		1485
739	void	1486	void
740	evtimer_again (struct ev_timer *w)	1487	ev_timer_again (EV_P_ ev_timer *w)
741	{	1488	{
742	if (ev_is_active (w))	1489	if (ev_is_active (w))
743	{	1490	{
744	if (w->repeat)	1491	if (w->repeat)
745	{	1492	{
746	w->at = now + w->repeat;	1493	((WT)w)->at = mn_now + w->repeat;
747	downheap ((WT *)timers, timercnt, w->active - 1);	1494	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
748	}	1495	}
749	else	1496	else
750	evtimer_stop (w);	1497	ev_timer_stop (EV_A_ w);
751	}	1498	}
752	else if (w->repeat)	1499	else if (w->repeat)
		1500	{
		1501	w->at = w->repeat;
753	evtimer_start (w);	1502	ev_timer_start (EV_A_ w);
		1503	}
754	}	1504	}
755		1505
		1506	#if EV_PERIODIC_ENABLE
756	void	1507	void
757	evperiodic_start (struct ev_periodic *w)	1508	ev_periodic_start (EV_P_ ev_periodic *w)
758	{	1509	{
759	if (ev_is_active (w))	1510	if (expect_false (ev_is_active (w)))
760	return;	1511	return;
761		1512
762	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1513	if (w->reschedule_cb)
763		1514	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1515	else if (w->interval)
		1516	{
		1517	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
764	/* this formula differs from the one in periodic_reify because we do not always round up */	1518	/* this formula differs from the one in periodic_reify because we do not always round up */
765	if (w->interval)
766	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1519	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1520	}
767		1521
768	ev_start ((W)w, ++periodiccnt);	1522	ev_start (EV_A_ (W)w, ++periodiccnt);
769	array_needsize (periodics, periodicmax, periodiccnt, );	1523	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
770	periodics [periodiccnt - 1] = w;	1524	periodics [periodiccnt - 1] = w;
771	upheap ((WT *)periodics, periodiccnt - 1);	1525	upheap ((WT *)periodics, periodiccnt - 1);
772	}
773		1526
		1527	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1528	}
		1529
774	void	1530	void
775	evperiodic_stop (struct ev_periodic *w)	1531	ev_periodic_stop (EV_P_ ev_periodic *w)
776	{	1532	{
777	ev_clear ((W)w);	1533	ev_clear_pending (EV_A_ (W)w);
778	if (!ev_is_active (w))	1534	if (expect_false (!ev_is_active (w)))
779	return;	1535	return;
780		1536
		1537	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1538
781	if (w->active < periodiccnt--)	1539	if (expect_true (((W)w)->active < periodiccnt--))
782	{	1540	{
783	periodics [w->active - 1] = periodics [periodiccnt];	1541	periodics [((W)w)->active - 1] = periodics [periodiccnt];
784	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1542	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
785	}	1543	}
786		1544
787	ev_stop ((W)w);	1545	ev_stop (EV_A_ (W)w);
788	}	1546	}
789		1547
790	void	1548	void
		1549	ev_periodic_again (EV_P_ ev_periodic *w)
		1550	{
		1551	/* TODO: use adjustheap and recalculation */
		1552	ev_periodic_stop (EV_A_ w);
		1553	ev_periodic_start (EV_A_ w);
		1554	}
		1555	#endif
		1556
		1557	void
		1558	ev_idle_start (EV_P_ ev_idle *w)
		1559	{
		1560	if (expect_false (ev_is_active (w)))
		1561	return;
		1562
		1563	ev_start (EV_A_ (W)w, ++idlecnt);
		1564	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1565	idles [idlecnt - 1] = w;
		1566	}
		1567
		1568	void
		1569	ev_idle_stop (EV_P_ ev_idle *w)
		1570	{
		1571	ev_clear_pending (EV_A_ (W)w);
		1572	if (expect_false (!ev_is_active (w)))
		1573	return;
		1574
		1575	{
		1576	int active = ((W)w)->active;
		1577	idles [active - 1] = idles [--idlecnt];
		1578	((W)idles [active - 1])->active = active;
		1579	}
		1580
		1581	ev_stop (EV_A_ (W)w);
		1582	}
		1583
		1584	void
		1585	ev_prepare_start (EV_P_ ev_prepare *w)
		1586	{
		1587	if (expect_false (ev_is_active (w)))
		1588	return;
		1589
		1590	ev_start (EV_A_ (W)w, ++preparecnt);
		1591	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1592	prepares [preparecnt - 1] = w;
		1593	}
		1594
		1595	void
		1596	ev_prepare_stop (EV_P_ ev_prepare *w)
		1597	{
		1598	ev_clear_pending (EV_A_ (W)w);
		1599	if (expect_false (!ev_is_active (w)))
		1600	return;
		1601
		1602	{
		1603	int active = ((W)w)->active;
		1604	prepares [active - 1] = prepares [--preparecnt];
		1605	((W)prepares [active - 1])->active = active;
		1606	}
		1607
		1608	ev_stop (EV_A_ (W)w);
		1609	}
		1610
		1611	void
		1612	ev_check_start (EV_P_ ev_check *w)
		1613	{
		1614	if (expect_false (ev_is_active (w)))
		1615	return;
		1616
		1617	ev_start (EV_A_ (W)w, ++checkcnt);
		1618	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1619	checks [checkcnt - 1] = w;
		1620	}
		1621
		1622	void
		1623	ev_check_stop (EV_P_ ev_check *w)
		1624	{
		1625	ev_clear_pending (EV_A_ (W)w);
		1626	if (expect_false (!ev_is_active (w)))
		1627	return;
		1628
		1629	{
		1630	int active = ((W)w)->active;
		1631	checks [active - 1] = checks [--checkcnt];
		1632	((W)checks [active - 1])->active = active;
		1633	}
		1634
		1635	ev_stop (EV_A_ (W)w);
		1636	}
		1637
		1638	#ifndef SA_RESTART
		1639	# define SA_RESTART 0
		1640	#endif
		1641
		1642	void
791	evsignal_start (struct ev_signal *w)	1643	ev_signal_start (EV_P_ ev_signal *w)
792	{	1644	{
		1645	#if EV_MULTIPLICITY
		1646	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1647	#endif
793	if (ev_is_active (w))	1648	if (expect_false (ev_is_active (w)))
794	return;	1649	return;
795		1650
		1651	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1652
796	ev_start ((W)w, 1);	1653	ev_start (EV_A_ (W)w, 1);
797	array_needsize (signals, signalmax, w->signum, signals_init);	1654	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
798	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1655	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
799		1656
800	if (!w->next)	1657	if (!((WL)w)->next)
801	{	1658	{
		1659	#if _WIN32
		1660	signal (w->signum, sighandler);
		1661	#else
802	struct sigaction sa;	1662	struct sigaction sa;
803	sa.sa_handler = sighandler;	1663	sa.sa_handler = sighandler;
804	sigfillset (&sa.sa_mask);	1664	sigfillset (&sa.sa_mask);
805	sa.sa_flags = 0;	1665	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
806	sigaction (w->signum, &sa, 0);	1666	sigaction (w->signum, &sa, 0);
		1667	#endif
807	}	1668	}
808	}	1669	}
809		1670
810	void	1671	void
811	evsignal_stop (struct ev_signal *w)	1672	ev_signal_stop (EV_P_ ev_signal *w)
812	{	1673	{
813	ev_clear ((W)w);	1674	ev_clear_pending (EV_A_ (W)w);
814	if (!ev_is_active (w))	1675	if (expect_false (!ev_is_active (w)))
815	return;	1676	return;
816		1677
817	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1678	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
818	ev_stop ((W)w);	1679	ev_stop (EV_A_ (W)w);
819		1680
820	if (!signals [w->signum - 1].head)	1681	if (!signals [w->signum - 1].head)
821	signal (w->signum, SIG_DFL);	1682	signal (w->signum, SIG_DFL);
822	}	1683	}
823		1684
824	void evidle_start (struct ev_idle *w)	1685	void
		1686	ev_child_start (EV_P_ ev_child *w)
825	{	1687	{
		1688	#if EV_MULTIPLICITY
		1689	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1690	#endif
826	if (ev_is_active (w))	1691	if (expect_false (ev_is_active (w)))
827	return;	1692	return;
828		1693
829	ev_start ((W)w, ++idlecnt);	1694	ev_start (EV_A_ (W)w, 1);
830	array_needsize (idles, idlemax, idlecnt, );	1695	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
831	idles [idlecnt - 1] = w;
832	}	1696	}
833		1697
834	void evidle_stop (struct ev_idle *w)	1698	void
		1699	ev_child_stop (EV_P_ ev_child *w)
835	{	1700	{
836	ev_clear ((W)w);	1701	ev_clear_pending (EV_A_ (W)w);
837	if (ev_is_active (w))	1702	if (expect_false (!ev_is_active (w)))
838	return;	1703	return;
839		1704
840	idles [w->active - 1] = idles [--idlecnt];	1705	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
841	ev_stop ((W)w);	1706	ev_stop (EV_A_ (W)w);
842	}	1707	}
843		1708
844	void evprepare_start (struct ev_prepare *w)	1709	#if EV_EMBED_ENABLE
		1710	void noinline
		1711	ev_embed_sweep (EV_P_ ev_embed *w)
845	{	1712	{
		1713	ev_loop (w->loop, EVLOOP_NONBLOCK);
		1714	}
		1715
		1716	static void
		1717	embed_cb (EV_P_ ev_io *io, int revents)
		1718	{
		1719	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
		1720
846	if (ev_is_active (w))	1721	if (ev_cb (w))
847	return;	1722	ev_feed_event (EV_A_ (W)w, EV_EMBED);
848		1723	else
849	ev_start ((W)w, ++preparecnt);	1724	ev_embed_sweep (loop, w);
850	array_needsize (prepares, preparemax, preparecnt, );
851	prepares [preparecnt - 1] = w;
852	}	1725	}
853		1726
854	void evprepare_stop (struct ev_prepare *w)	1727	void
		1728	ev_embed_start (EV_P_ ev_embed *w)
855	{	1729	{
856	ev_clear ((W)w);
857	if (ev_is_active (w))	1730	if (expect_false (ev_is_active (w)))
858	return;	1731	return;
859		1732
860	prepares [w->active - 1] = prepares [--preparecnt];	1733	{
		1734	struct ev_loop *loop = w->loop;
		1735	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		1736	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		1737	}
		1738
		1739	ev_set_priority (&w->io, ev_priority (w));
		1740	ev_io_start (EV_A_ &w->io);
		1741
		1742	ev_start (EV_A_ (W)w, 1);
		1743	}
		1744
		1745	void
		1746	ev_embed_stop (EV_P_ ev_embed *w)
		1747	{
		1748	ev_clear_pending (EV_A_ (W)w);
		1749	if (expect_false (!ev_is_active (w)))
		1750	return;
		1751
		1752	ev_io_stop (EV_A_ &w->io);
		1753
861	ev_stop ((W)w);	1754	ev_stop (EV_A_ (W)w);
862	}	1755	}
		1756	#endif
863		1757
864	void evcheck_start (struct ev_check *w)	1758	#if EV_STAT_ENABLE
		1759
		1760	# ifdef _WIN32
		1761	# define lstat(a,b) stat(a,b)
		1762	# endif
		1763
		1764	void
		1765	ev_stat_stat (EV_P_ ev_stat *w)
865	{	1766	{
		1767	if (lstat (w->path, &w->attr) < 0)
		1768	w->attr.st_nlink = 0;
		1769	else if (!w->attr.st_nlink)
		1770	w->attr.st_nlink = 1;
		1771	}
		1772
		1773	static void
		1774	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1775	{
		1776	ev_stat w = (ev_stat )(((char *)w_) - offsetof (ev_stat, timer));
		1777
		1778	/* we copy this here each the time so that */
		1779	/* prev has the old value when the callback gets invoked */
		1780	w->prev = w->attr;
		1781	ev_stat_stat (EV_A_ w);
		1782
		1783	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
		1784	ev_feed_event (EV_A_ w, EV_STAT);
		1785	}
		1786
		1787	void
		1788	ev_stat_start (EV_P_ ev_stat *w)
		1789	{
866	if (ev_is_active (w))	1790	if (expect_false (ev_is_active (w)))
867	return;	1791	return;
868		1792
869	ev_start ((W)w, ++checkcnt);	1793	/* since we use memcmp, we need to clear any padding data etc. */
870	array_needsize (checks, checkmax, checkcnt, );	1794	memset (&w->prev, 0, sizeof (ev_statdata));
871	checks [checkcnt - 1] = w;	1795	memset (&w->attr, 0, sizeof (ev_statdata));
872	}
873		1796
874	void evcheck_stop (struct ev_check *w)	1797	ev_stat_stat (EV_A_ w);
875	{
876	ev_clear ((W)w);
877	if (ev_is_active (w))
878	return;
879		1798
880	checks [w->active - 1] = checks [--checkcnt];	1799	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		1800	ev_set_priority (&w->timer, ev_priority (w));
		1801	ev_timer_start (EV_A_ &w->timer);
		1802
		1803	ev_start (EV_A_ (W)w, 1);
		1804	}
		1805
		1806	void
		1807	ev_stat_stop (EV_P_ ev_stat *w)
		1808	{
		1809	ev_clear_pending (EV_A_ (W)w);
		1810	if (expect_false (!ev_is_active (w)))
		1811	return;
		1812
		1813	ev_timer_stop (EV_A_ &w->timer);
		1814
881	ev_stop ((W)w);	1815	ev_stop (EV_A_ (W)w);
882	}	1816	}
		1817	#endif
883		1818
884	/*****************************************************************************/	1819	/*****************************************************************************/
885		1820
886	struct ev_once	1821	struct ev_once
887	{	1822	{
888	struct ev_io io;	1823	ev_io io;
889	struct ev_timer to;	1824	ev_timer to;
890	void (cb)(int revents, void arg);	1825	void (cb)(int revents, void arg);
891	void *arg;	1826	void *arg;
892	};	1827	};
893		1828
894	static void	1829	static void
895	once_cb (struct ev_once *once, int revents)	1830	once_cb (EV_P_ struct ev_once *once, int revents)
896	{	1831	{
897	void (cb)(int revents, void arg) = once->cb;	1832	void (cb)(int revents, void arg) = once->cb;
898	void *arg = once->arg;	1833	void *arg = once->arg;
899		1834
900	evio_stop (&once->io);	1835	ev_io_stop (EV_A_ &once->io);
901	evtimer_stop (&once->to);	1836	ev_timer_stop (EV_A_ &once->to);
902	free (once);	1837	ev_free (once);
903		1838
904	cb (revents, arg);	1839	cb (revents, arg);
905	}	1840	}
906		1841
907	static void	1842	static void
908	once_cb_io (struct ev_io *w, int revents)	1843	once_cb_io (EV_P_ ev_io *w, int revents)
909	{	1844	{
910	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1845	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
911	}	1846	}
912		1847
913	static void	1848	static void
914	once_cb_to (struct ev_timer *w, int revents)	1849	once_cb_to (EV_P_ ev_timer *w, int revents)
915	{	1850	{
916	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1851	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
917	}	1852	}
918		1853
919	void	1854	void
920	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1855	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
921	{	1856	{
922	struct ev_once *once = malloc (sizeof (struct ev_once));	1857	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
923		1858
924	if (!once)	1859	if (expect_false (!once))
925	cb (EV_ERROR, arg);	1860	{
926	else	1861	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1862	return;
927	{	1863	}
		1864
928	once->cb = cb;	1865	once->cb = cb;
929	once->arg = arg;	1866	once->arg = arg;
930		1867
931	evw_init (&once->io, once_cb_io);	1868	ev_init (&once->io, once_cb_io);
932
933	if (fd >= 0)	1869	if (fd >= 0)
934	{	1870	{
935	evio_set (&once->io, fd, events);	1871	ev_io_set (&once->io, fd, events);
936	evio_start (&once->io);	1872	ev_io_start (EV_A_ &once->io);
937	}	1873	}
938		1874
939	evw_init (&once->to, once_cb_to);	1875	ev_init (&once->to, once_cb_to);
940
941	if (timeout >= 0.)	1876	if (timeout >= 0.)
942	{	1877	{
943	evtimer_set (&once->to, timeout, 0.);	1878	ev_timer_set (&once->to, timeout, 0.);
944	evtimer_start (&once->to);	1879	ev_timer_start (EV_A_ &once->to);
945	}
946	}
947	}
948
949	/*****************************************************************************/
950
951	#if 0
952
953	struct ev_io wio;
954
955	static void
956	sin_cb (struct ev_io *w, int revents)
957	{
958	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
959	}
960
961	static void
962	ocb (struct ev_timer *w, int revents)
963	{
964	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
965	evtimer_stop (w);
966	evtimer_start (w);
967	}
968
969	static void
970	scb (struct ev_signal *w, int revents)
971	{
972	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
973	evio_stop (&wio);
974	evio_start (&wio);
975	}
976
977	static void
978	gcb (struct ev_signal *w, int revents)
979	{
980	fprintf (stderr, "generic %x\n", revents);
981
982	}
983
984	int main (void)
985	{
986	ev_init (0);
987
988	evio_init (&wio, sin_cb, 0, EV_READ);
989	evio_start (&wio);
990
991	struct ev_timer t[10000];
992
993	#if 0
994	int i;
995	for (i = 0; i < 10000; ++i)
996	{	1880	}
997	struct ev_timer *w = t + i;
998	evw_init (w, ocb, i);
999	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1000	evtimer_start (w);
1001	if (drand48 () < 0.5)
1002	evtimer_stop (w);
1003	}
1004	#endif
1005
1006	struct ev_timer t1;
1007	evtimer_init (&t1, ocb, 5, 10);
1008	evtimer_start (&t1);
1009
1010	struct ev_signal sig;
1011	evsignal_init (&sig, scb, SIGQUIT);
1012	evsignal_start (&sig);
1013
1014	struct ev_check cw;
1015	evcheck_init (&cw, gcb);
1016	evcheck_start (&cw);
1017
1018	struct ev_idle iw;
1019	evidle_init (&iw, gcb);
1020	evidle_start (&iw);
1021
1022	ev_loop (0);
1023
1024	return 0;
1025	}	1881	}
1026		1882
		1883	#ifdef __cplusplus
		1884	}
1027	#endif	1885	#endif
1028		1886
1029
1030
1031

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Comparing libev/ev.c (file contents): Revision 1.21 by root, Wed Oct 31 18:37:38 2007 UTC vs. Revision 1.140 by root, Mon Nov 26 19:49:36 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.21 by root, Wed Oct 31 18:37:38 2007 UTC vs.
Revision 1.140 by root, Mon Nov 26 19:49:36 2007 UTC