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Comparing libev/ev.c (file contents):
Revision 1.14 by root, Wed Oct 31 11:52:12 2007 UTC vs.
Revision 1.142 by root, Tue Nov 27 06:19:08 2007 UTC

		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without
		8	* modification, are permitted provided that the following conditions are
		9	* met:
		10	*
		11	* * Redistributions of source code must retain the above copyright
		12	* notice, this list of conditions and the following disclaimer.
		13	*
		14	* * Redistributions in binary form must reproduce the above
		15	* copyright notice, this list of conditions and the following
		16	* disclaimer in the documentation and/or other materials provided
		17	* with the distribution.
		18	*
		19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
		22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
		23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
		24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
		25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
		29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		30	*/
		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
1	#include <math.h>	101	#include <math.h>
2	#include <stdlib.h>	102	#include <stdlib.h>
3	#include <unistd.h>
4	#include <fcntl.h>	103	#include <fcntl.h>
5	#include <signal.h>	104	#include <stddef.h>
6		105
7	#include <stdio.h>	106	#include <stdio.h>
8		107
9	#include <assert.h>	108	#include <assert.h>
10	#include <errno.h>	109	#include <errno.h>
11	#include <sys/time.h>	110	#include <sys/types.h>
12	#include <time.h>	111	#include <time.h>
13		112
14	#define HAVE_EPOLL 1	113	#include <signal.h>
15		114
16	#ifndef HAVE_MONOTONIC	115	#ifndef _WIN32
17	# ifdef CLOCK_MONOTONIC	116	# include <sys/time.h>
18	# define HAVE_MONOTONIC 1	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
19	# endif	124	# endif
20	#endif	125	#endif
21		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
22	#ifndef HAVE_SELECT	137	#ifndef EV_USE_SELECT
23	# 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
24	#endif	146	# endif
		147	#endif
25		148
26	#ifndef HAVE_EPOLL	149	#ifndef EV_USE_EPOLL
27	# define HAVE_EPOLL 0	150	# define EV_USE_EPOLL 0
28	#endif	151	#endif
29		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
30	#ifndef HAVE_REALTIME	168	#ifndef CLOCK_REALTIME
31	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	169	# undef EV_USE_REALTIME
		170	# define EV_USE_REALTIME 0
32	#endif	171	#endif
		172
		173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
		175	#endif
		176
		177	/**/
33		178
34	#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) */
35	#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 */
36		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
37	#include "ev.h"	187	# include "ev.h"
		188	#endif
38		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
39	typedef struct ev_watcher *W;	216	typedef ev_watcher *W;
40	typedef struct ev_watcher_list *WL;	217	typedef ev_watcher_list *WL;
41	typedef struct ev_watcher_time *WT;	218	typedef ev_watcher_time *WT;
42		219
43	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
44	ev_tstamp ev_now;	311	ev_tstamp ev_rt_now;
45	int ev_method;	312	#define VAR(name,decl) static decl;
		313	#include "ev_vars.h"
		314	#undef VAR
46		315
47	static int have_monotonic; /* runtime */	316	static int ev_default_loop_ptr;
48		317
49	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	318	#endif
50	static void (*method_modify)(int fd, int oev, int nev);
51	static void (*method_poll)(ev_tstamp timeout);
52		319
53	/*****************************************************************************/	320	/*****************************************************************************/
54		321
55	ev_tstamp	322	ev_tstamp
56	ev_time (void)	323	ev_time (void)
57	{	324	{
58	#if HAVE_REALTIME	325	#if EV_USE_REALTIME
59	struct timespec ts;	326	struct timespec ts;
60	clock_gettime (CLOCK_REALTIME, &ts);	327	clock_gettime (CLOCK_REALTIME, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	328	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	#else	329	#else
63	struct timeval tv;	330	struct timeval tv;
64	gettimeofday (&tv, 0);	331	gettimeofday (&tv, 0);
65	return tv.tv_sec + tv.tv_usec * 1e-6;	332	return tv.tv_sec + tv.tv_usec * 1e-6;
66	#endif	333	#endif
67	}	334	}
68		335
69	static ev_tstamp	336	ev_tstamp inline_size
70	get_clock (void)	337	get_clock (void)
71	{	338	{
72	#if HAVE_MONOTONIC	339	#if EV_USE_MONOTONIC
73	if (have_monotonic)	340	if (expect_true (have_monotonic))
74	{	341	{
75	struct timespec ts;	342	struct timespec ts;
76	clock_gettime (CLOCK_MONOTONIC, &ts);	343	clock_gettime (CLOCK_MONOTONIC, &ts);
77	return ts.tv_sec + ts.tv_nsec * 1e-9;	344	return ts.tv_sec + ts.tv_nsec * 1e-9;
78	}	345	}
79	#endif	346	#endif
80		347
81	return ev_time ();	348	return ev_time ();
82	}	349	}
83		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
84	#define array_needsize(base,cur,cnt,init) \	361	#define array_needsize(type,base,cur,cnt,init) \
85	if ((cnt) > cur) \	362	if (expect_false ((cnt) > cur)) \
86	{ \	363	{ \
87	int newcnt = cur ? cur << 1 : 16; \	364	int newcnt = cur; \
88	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	365	do \
		366	{ \
		367	newcnt = array_roundsize (type, newcnt << 1); \
		368	} \
		369	while ((cnt) > newcnt); \
		370	\
89	base = realloc (base, sizeof (*base) * (newcnt)); \	371	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
90	init (base + cur, newcnt - cur); \	372	init (base + cur, newcnt - cur); \
91	cur = newcnt; \	373	cur = newcnt; \
92	}	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;
93		386
94	/*****************************************************************************/	387	/*****************************************************************************/
95		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
96	typedef struct	613	typedef struct
97	{	614	{
98	struct ev_io *head;	615	WL head;
99	unsigned char wev, rev; /* want, received event set */
100	} ANFD;
101
102	static ANFD *anfds;
103	static int anfdmax;
104
105	static int *fdchanges;
106	static int fdchangemax, fdchangecnt;
107
108	static void
109	anfds_init (ANFD *base, int count)
110	{
111	while (count--)
112	{
113	base->head = 0;
114	base->wev = base->rev = EV_NONE;
115	++base;
116	}
117	}
118
119	typedef struct
120	{
121	W w;
122	int events;
123	} ANPENDING;
124
125	static ANPENDING *pendings;
126	static int pendingmax, pendingcnt;
127
128	static void
129	event (W w, int events)
130	{
131	w->pending = ++pendingcnt;
132	array_needsize (pendings, pendingmax, pendingcnt, );
133	pendings [pendingcnt - 1].w = w;
134	pendings [pendingcnt - 1].events = events;
135	}
136
137	static void
138	fd_event (int fd, int events)
139	{
140	ANFD *anfd = anfds + fd;
141	struct ev_io *w;
142
143	for (w = anfd->head; w; w = w->next)
144	{
145	int ev = w->events & events;
146
147	if (ev)
148	event ((W)w, ev);
149	}
150	}
151
152	static void
153	queue_events (W *events, int eventcnt, int type)
154	{
155	int i;
156
157	for (i = 0; i < eventcnt; ++i)
158	event (events [i], type);
159	}
160
161	/*****************************************************************************/
162
163	static struct ev_timer **timers;
164	static int timermax, timercnt;
165
166	static struct ev_periodic **periodics;
167	static int periodicmax, periodiccnt;
168
169	static void
170	upheap (WT *timers, int k)
171	{
172	WT w = timers [k];
173
174	while (k && timers [k >> 1]->at > w->at)
175	{
176	timers [k] = timers [k >> 1];
177	timers [k]->active = k + 1;
178	k >>= 1;
179	}
180
181	timers [k] = w;
182	timers [k]->active = k + 1;
183
184	}
185
186	static void
187	downheap (WT *timers, int N, int k)
188	{
189	WT w = timers [k];
190
191	while (k < (N >> 1))
192	{
193	int j = k << 1;
194
195	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
196	++j;
197
198	if (w->at <= timers [j]->at)
199	break;
200
201	timers [k] = timers [j];
202	timers [k]->active = k + 1;
203	k = j;
204	}
205
206	timers [k] = w;
207	timers [k]->active = k + 1;
208	}
209
210	/*****************************************************************************/
211
212	typedef struct
213	{
214	struct ev_signal *head;
215	sig_atomic_t gotsig;	616	sig_atomic_t volatile gotsig;
216	} ANSIG;	617	} ANSIG;
217		618
218	static ANSIG *signals;	619	static ANSIG *signals;
219	static int signalmax;	620	static int signalmax;
220		621
221	static int sigpipe [2];	622	static int sigpipe [2];
222	static sig_atomic_t gotsig;	623	static sig_atomic_t volatile gotsig;
223	static struct ev_io sigev;	624	static ev_io sigev;
224		625
225	static void	626	void inline_size
226	signals_init (ANSIG *base, int count)	627	signals_init (ANSIG *base, int count)
227	{	628	{
228	while (count--)	629	while (count--)
229	{	630	{
230	base->head = 0;	631	base->head = 0;
231	base->gotsig = 0;	632	base->gotsig = 0;
		633
232	++base;	634	++base;
233	}	635	}
234	}	636	}
235		637
236	static void	638	static void
237	sighandler (int signum)	639	sighandler (int signum)
238	{	640	{
		641	#if _WIN32
		642	signal (signum, sighandler);
		643	#endif
		644
239	signals [signum - 1].gotsig = 1;	645	signals [signum - 1].gotsig = 1;
240		646
241	if (!gotsig)	647	if (!gotsig)
242	{	648	{
		649	int old_errno = errno;
243	gotsig = 1;	650	gotsig = 1;
244	write (sigpipe [1], &gotsig, 1);	651	write (sigpipe [1], &signum, 1);
		652	errno = old_errno;
245	}	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);
246	}	674	}
247		675
248	static void	676	static void
249	sigcb (struct ev_io *iow, int revents)	677	sigcb (EV_P_ ev_io *iow, int revents)
250	{	678	{
251	struct ev_signal *w;
252	int sig;	679	int signum;
253		680
		681	read (sigpipe [0], &revents, 1);
254	gotsig = 0;	682	gotsig = 0;
255	read (sigpipe [0], &revents, 1);
256		683
257	for (sig = signalmax; sig--; )	684	for (signum = signalmax; signum--; )
258	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)
259	{	727	{
260	signals [sig].gotsig = 0;	728	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
261		729	w->rpid = pid;
262	for (w = signals [sig].head; w; w = w->next)	730	w->rstatus = status;
263	event ((W)w, EV_SIGNAL);	731	ev_feed_event (EV_A_ (W)w, EV_CHILD);
264	}	732	}
265	}	733	}
266		734
		735	#ifndef WCONTINUED
		736	# define WCONTINUED 0
		737	#endif
		738
267	static void	739	static void
268	siginit (void)	740	childcb (EV_P_ ev_signal *sw, int revents)
269	{	741	{
270	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	742	int pid, status;
271	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
272		743
273	/* rather than sort out wether we really need nb, set it */	744	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
274	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	745	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
275	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	746	if (!WCONTINUED
		747	|| errno != EINVAL
		748	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		749	return;
276		750
277	evio_set (&sigev, sigpipe [0], EV_READ);	751	/* make sure we are called again until all childs have been reaped */
278	evio_start (&sigev);	752	/* we need to do it this way so that the callback gets called before we continue */
		753	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		754
		755	child_reap (EV_A_ sw, pid, pid, status);
		756	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
279	}	757	}
		758
		759	#endif
280		760
281	/*****************************************************************************/	761	/*****************************************************************************/
282		762
283	static struct ev_idle **idles;	763	#if EV_USE_PORT
284	static int idlemax, idlecnt;	764	# include "ev_port.c"
		765	#endif
		766	#if EV_USE_KQUEUE
		767	# include "ev_kqueue.c"
		768	#endif
		769	#if EV_USE_EPOLL
		770	# include "ev_epoll.c"
		771	#endif
		772	#if EV_USE_POLL
		773	# include "ev_poll.c"
		774	#endif
		775	#if EV_USE_SELECT
		776	# include "ev_select.c"
		777	#endif
285		778
286	static struct ev_check **checks;	779	int
287	static int checkmax, checkcnt;	780	ev_version_major (void)
		781	{
		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)
		853	{
		854	#if EV_USE_MONOTONIC
		855	{
		856	struct timespec ts;
		857	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		858	have_monotonic = 1;
		859	}
		860	#endif
		861
		862	ev_rt_now = ev_time ();
		863	mn_now = get_clock ();
		864	now_floor = mn_now;
		865	rtmn_diff = ev_rt_now - mn_now;
		866
		867	if (!(flags & EVFLAG_NOENV)
		868	&& !enable_secure ()
		869	&& getenv ("LIBEV_FLAGS"))
		870	flags = atoi (getenv ("LIBEV_FLAGS"));
		871
		872	if (!(flags & 0x0000ffffUL))
		873	flags |= ev_recommended_backends ();
		874
		875	backend = 0;
		876	#if EV_USE_PORT
		877	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		878	#endif
		879	#if EV_USE_KQUEUE
		880	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		881	#endif
		882	#if EV_USE_EPOLL
		883	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		884	#endif
		885	#if EV_USE_POLL
		886	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		887	#endif
		888	#if EV_USE_SELECT
		889	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		890	#endif
		891
		892	ev_init (&sigev, sigcb);
		893	ev_set_priority (&sigev, EV_MAXPRI);
		894	}
		895	}
		896
		897	static void
		898	loop_destroy (EV_P)
		899	{
		900	int i;
		901
		902	#if EV_USE_PORT
		903	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		904	#endif
		905	#if EV_USE_KQUEUE
		906	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		907	#endif
		908	#if EV_USE_EPOLL
		909	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		910	#endif
		911	#if EV_USE_POLL
		912	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		913	#endif
		914	#if EV_USE_SELECT
		915	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		916	#endif
		917
		918	for (i = NUMPRI; i--; )
		919	array_free (pending, [i]);
		920
		921	/* have to use the microsoft-never-gets-it-right macro */
		922	array_free (fdchange, EMPTY0);
		923	array_free (timer, EMPTY0);
		924	#if EV_PERIODIC_ENABLE
		925	array_free (periodic, EMPTY0);
		926	#endif
		927	array_free (idle, EMPTY0);
		928	array_free (prepare, EMPTY0);
		929	array_free (check, EMPTY0);
		930
		931	backend = 0;
		932	}
		933
		934	static void
		935	loop_fork (EV_P)
		936	{
		937	#if EV_USE_PORT
		938	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		939	#endif
		940	#if EV_USE_KQUEUE
		941	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		942	#endif
		943	#if EV_USE_EPOLL
		944	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		945	#endif
		946
		947	if (ev_is_active (&sigev))
		948	{
		949	/* default loop */
		950
		951	ev_ref (EV_A);
		952	ev_io_stop (EV_A_ &sigev);
		953	close (sigpipe [0]);
		954	close (sigpipe [1]);
		955
		956	while (pipe (sigpipe))
		957	syserr ("(libev) error creating pipe");
		958
		959	siginit (EV_A);
		960	}
		961
		962	postfork = 0;
		963	}
		964
		965	#if EV_MULTIPLICITY
		966	struct ev_loop *
		967	ev_loop_new (unsigned int flags)
		968	{
		969	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		970
		971	memset (loop, 0, sizeof (struct ev_loop));
		972
		973	loop_init (EV_A_ flags);
		974
		975	if (ev_backend (EV_A))
		976	return loop;
		977
		978	return 0;
		979	}
		980
		981	void
		982	ev_loop_destroy (EV_P)
		983	{
		984	loop_destroy (EV_A);
		985	ev_free (loop);
		986	}
		987
		988	void
		989	ev_loop_fork (EV_P)
		990	{
		991	postfork = 1;
		992	}
		993
		994	#endif
		995
		996	#if EV_MULTIPLICITY
		997	struct ev_loop *
		998	ev_default_loop_init (unsigned int flags)
		999	#else
		1000	int
		1001	ev_default_loop (unsigned int flags)
		1002	#endif
		1003	{
		1004	if (sigpipe [0] == sigpipe [1])
		1005	if (pipe (sigpipe))
		1006	return 0;
		1007
		1008	if (!ev_default_loop_ptr)
		1009	{
		1010	#if EV_MULTIPLICITY
		1011	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1012	#else
		1013	ev_default_loop_ptr = 1;
		1014	#endif
		1015
		1016	loop_init (EV_A_ flags);
		1017
		1018	if (ev_backend (EV_A))
		1019	{
		1020	siginit (EV_A);
		1021
		1022	#ifndef _WIN32
		1023	ev_signal_init (&childev, childcb, SIGCHLD);
		1024	ev_set_priority (&childev, EV_MAXPRI);
		1025	ev_signal_start (EV_A_ &childev);
		1026	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1027	#endif
		1028	}
		1029	else
		1030	ev_default_loop_ptr = 0;
		1031	}
		1032
		1033	return ev_default_loop_ptr;
		1034	}
		1035
		1036	void
		1037	ev_default_destroy (void)
		1038	{
		1039	#if EV_MULTIPLICITY
		1040	struct ev_loop *loop = ev_default_loop_ptr;
		1041	#endif
		1042
		1043	#ifndef _WIN32
		1044	ev_ref (EV_A); /* child watcher */
		1045	ev_signal_stop (EV_A_ &childev);
		1046	#endif
		1047
		1048	ev_ref (EV_A); /* signal watcher */
		1049	ev_io_stop (EV_A_ &sigev);
		1050
		1051	close (sigpipe [0]); sigpipe [0] = 0;
		1052	close (sigpipe [1]); sigpipe [1] = 0;
		1053
		1054	loop_destroy (EV_A);
		1055	}
		1056
		1057	void
		1058	ev_default_fork (void)
		1059	{
		1060	#if EV_MULTIPLICITY
		1061	struct ev_loop *loop = ev_default_loop_ptr;
		1062	#endif
		1063
		1064	if (backend)
		1065	postfork = 1;
		1066	}
288		1067
289	/*****************************************************************************/	1068	/*****************************************************************************/
290		1069
291	#if HAVE_EPOLL	1070	int inline_size
292	# include "ev_epoll.c"	1071	any_pending (EV_P)
293	#endif
294	#if HAVE_SELECT
295	# include "ev_select.c"
296	#endif
297
298	int ev_init (int flags)
299	{	1072	{
300	#if HAVE_MONOTONIC	1073	int pri;
301	{
302	struct timespec ts;
303	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
304	have_monotonic = 1;
305	}
306	#endif
307		1074
308	ev_now = ev_time ();	1075	for (pri = NUMPRI; pri--; )
309	now = get_clock ();	1076	if (pendingcnt [pri])
310	diff = ev_now - now;	1077	return 1;
311		1078
312	if (pipe (sigpipe))
313	return 0;	1079	return 0;
314
315	ev_method = EVMETHOD_NONE;
316	#if HAVE_EPOLL
317	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
318	#endif
319	#if HAVE_SELECT
320	if (ev_method == EVMETHOD_NONE) select_init (flags);
321	#endif
322
323	if (ev_method)
324	{
325	evw_init (&sigev, sigcb);
326	siginit ();
327	}
328
329	return ev_method;
330	}	1080	}
331		1081
332	/*****************************************************************************/	1082	void inline_speed
333		1083	call_pending (EV_P)
334	void ev_prefork (void)
335	{	1084	{
336	/* nop */
337	}
338
339	void ev_postfork_parent (void)
340	{
341	/* nop */
342	}
343
344	void ev_postfork_child (void)
345	{
346	#if HAVE_EPOLL
347	if (ev_method == EVMETHOD_EPOLL)
348	epoll_postfork_child ();
349	#endif
350
351	evio_stop (&sigev);
352	close (sigpipe [0]);
353	close (sigpipe [1]);
354	pipe (sigpipe);
355	siginit ();
356	}
357
358	/*****************************************************************************/
359
360	static void
361	fd_reify (void)
362	{
363	int i;	1085	int pri;
364		1086
365	for (i = 0; i < fdchangecnt; ++i)	1087	for (pri = NUMPRI; pri--; )
		1088	while (pendingcnt [pri])
366	{	1089	{
367	int fd = fdchanges [i];	1090	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
368	ANFD *anfd = anfds + fd;
369	struct ev_io *w;
370		1091
371	int wev = 0;	1092	if (expect_true (p->w))
372
373	for (w = anfd->head; w; w = w->next)
374	wev |= w->events;
375
376	if (anfd->wev != wev)
377	{	1093	{
378	method_modify (fd, anfd->wev, wev);	1094	assert (("non-pending watcher on pending list", p->w->pending));
379	anfd->wev = wev;
380	}
381	}
382		1095
383	fdchangecnt = 0;
384	}
385
386	static void
387	call_pending ()
388	{
389	int i;
390
391	for (i = 0; i < pendingcnt; ++i)
392	{
393	ANPENDING *p = pendings + i;
394
395	if (p->w)
396	{
397	p->w->pending = 0;	1096	p->w->pending = 0;
398	p->w->cb (p->w, p->events);	1097	EV_CB_INVOKE (p->w, p->events);
399	}	1098	}
400	}	1099	}
401
402	pendingcnt = 0;
403	}	1100	}
404		1101
405	static void	1102	void inline_size
406	timers_reify ()	1103	timers_reify (EV_P)
407	{	1104	{
408	while (timercnt && timers [0]->at <= now)	1105	while (timercnt && ((WT)timers [0])->at <= mn_now)
409	{	1106	{
410	struct ev_timer *w = timers [0];	1107	ev_timer *w = timers [0];
		1108
		1109	assert (("inactive timer on timer heap detected", ev_is_active (w)));
411		1110
412	/* first reschedule or stop timer */	1111	/* first reschedule or stop timer */
413	if (w->repeat)	1112	if (w->repeat)
414	{	1113	{
		1114	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1115
415	w->at = now + w->repeat;	1116	((WT)w)->at += w->repeat;
416	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
417	downheap ((WT *)timers, timercnt, 0);	1120	downheap ((WT *)timers, timercnt, 0);
418	}	1121	}
419	else	1122	else
420	evtimer_stop (w); /* nonrepeating: stop timer */	1123	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
421		1124
422	event ((W)w, EV_TIMEOUT);	1125	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
423	}	1126	}
424	}	1127	}
425		1128
426	static void	1129	#if EV_PERIODIC_ENABLE
		1130	void inline_size
427	periodics_reify ()	1131	periodics_reify (EV_P)
428	{	1132	{
429	while (periodiccnt && periodics [0]->at <= ev_now)	1133	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
430	{	1134	{
431	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)));
432		1138
433	/* first reschedule or stop timer */	1139	/* first reschedule or stop timer */
434	if (w->interval)	1140	if (w->reschedule_cb)
435	{	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	{
436	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;
437	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));
438	downheap ((WT *)periodics, periodiccnt, 0);	1150	downheap ((WT *)periodics, periodiccnt, 0);
439	}	1151	}
440	else	1152	else
441	evperiodic_stop (w); /* nonrepeating: stop timer */	1153	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
442		1154
443	event ((W)w, EV_TIMEOUT);	1155	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
444	}	1156	}
445	}	1157	}
446		1158
447	static void	1159	static void noinline
448	periodics_reschedule (ev_tstamp diff)	1160	periodics_reschedule (EV_P)
449	{	1161	{
450	int i;	1162	int i;
451		1163
452	/* adjust periodics after time jump */	1164	/* adjust periodics after time jump */
453	for (i = 0; i < periodiccnt; ++i)	1165	for (i = 0; i < periodiccnt; ++i)
454	{	1166	{
455	struct ev_periodic *w = periodics [i];	1167	ev_periodic *w = periodics [i];
456		1168
		1169	if (w->reschedule_cb)
		1170	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
457	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))
458	{	1208	{
459	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1209	ev_tstamp odiff = rtmn_diff;
460		1210
461	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; )
462	{	1220	{
463	evperiodic_stop (w);	1221	rtmn_diff = ev_rt_now - mn_now;
464	evperiodic_start (w);
465		1222
466	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;
467	}	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) */
468	}	1236	}
469	}	1237	}
470	}	1238	else
471		1239	#endif
472	static void	1240	{
473	time_update ()
474	{
475	int i;
476
477	ev_now = ev_time ();	1241	ev_rt_now = ev_time ();
478		1242
479	if (have_monotonic)	1243	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
480	{
481	ev_tstamp odiff = diff;
482
483	for (i = 4; --i; ) /* loop a few times, before making important decisions */
484	{	1244	{
485	now = get_clock ();	1245	#if EV_PERIODIC_ENABLE
486	diff = ev_now - now;
487
488	if (fabs (odiff - diff) < MIN_TIMEJUMP)
489	return; /* all is well */
490
491	ev_now = ev_time ();
492	}
493
494	periodics_reschedule (diff - odiff);
495	/* no timer adjustment, as the monotonic clock doesn't jump */
496	}
497	else
498	{
499	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
500	{
501	periodics_reschedule (ev_now - now);	1246	periodics_reschedule (EV_A);
		1247	#endif
502		1248
503	/* 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 */
504	for (i = 0; i < timercnt; ++i)	1250	for (i = 0; i < timercnt; ++i)
505	timers [i]->at += diff;	1251	((WT)timers [i])->at += ev_rt_now - mn_now;
506	}	1252	}
507		1253
508	now = ev_now;	1254	mn_now = ev_rt_now;
509	}
510	}
511
512	int ev_loop_done;
513
514	void ev_loop (int flags)
515	{
516	double block;
517	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
518
519	if (checkcnt)
520	{	1255	}
521	queue_events ((W *)checks, checkcnt, EV_CHECK);	1256	}
		1257
		1258	void
		1259	ev_ref (EV_P)
		1260	{
		1261	++activecnt;
		1262	}
		1263
		1264	void
		1265	ev_unref (EV_P)
		1266	{
		1267	--activecnt;
		1268	}
		1269
		1270	static int loop_done;
		1271
		1272	void
		1273	ev_loop (EV_P_ int flags)
		1274	{
		1275	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1276	? EVUNLOOP_ONE
		1277	: EVUNLOOP_CANCEL;
		1278
		1279	while (activecnt)
		1280	{
		1281	/* queue check watchers (and execute them) */
		1282	if (expect_false (preparecnt))
		1283	{
		1284	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
522	call_pending ();	1285	call_pending (EV_A);
523	}	1286	}
524		1287
525	do	1288	/* we might have forked, so reify kernel state if necessary */
526	{	1289	if (expect_false (postfork))
		1290	loop_fork (EV_A);
		1291
527	/* update fd-related kernel structures */	1292	/* update fd-related kernel structures */
528	fd_reify ();	1293	fd_reify (EV_A);
529		1294
530	/* calculate blocking time */	1295	/* calculate blocking time */
		1296	{
		1297	double block;
531		1298
532	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */
533	ev_now = ev_time ();
534
535	if (flags & EVLOOP_NONBLOCK || idlecnt)	1299	if (flags & EVLOOP_NONBLOCK || idlecnt)
536	block = 0.;	1300	block = 0.; /* do not block at all */
537	else	1301	else
538	{	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
539	block = MAX_BLOCKTIME;	1314	block = MAX_BLOCKTIME;
540		1315
541	if (timercnt)	1316	if (timercnt)
542	{	1317	{
543	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;
544	if (block > to) block = to;	1319	if (block > to) block = to;
545	}	1320	}
546		1321
		1322	#if EV_PERIODIC_ENABLE
547	if (periodiccnt)	1323	if (periodiccnt)
548	{	1324	{
549	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1325	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
550	if (block > to) block = to;	1326	if (block > to) block = to;
551	}	1327	}
		1328	#endif
552		1329
553	if (block < 0.) block = 0.;	1330	if (expect_false (block < 0.)) block = 0.;
554	}	1331	}
555		1332
556	method_poll (block);	1333	backend_poll (EV_A_ block);
		1334	}
557		1335
558	/* update ev_now, do magic */	1336	/* update ev_rt_now, do magic */
559	time_update ();	1337	time_update (EV_A);
560		1338
561	/* queue pending timers and reschedule them */	1339	/* queue pending timers and reschedule them */
		1340	timers_reify (EV_A); /* relative timers called last */
		1341	#if EV_PERIODIC_ENABLE
562	periodics_reify (); /* absolute timers first */	1342	periodics_reify (EV_A); /* absolute timers called first */
563	timers_reify (); /* relative timers second */	1343	#endif
564		1344
565	/* queue idle watchers unless io or timers are pending */	1345	/* queue idle watchers unless other events are pending */
566	if (!pendingcnt)	1346	if (idlecnt && !any_pending (EV_A))
567	queue_events ((W *)idles, idlecnt, EV_IDLE);	1347	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
568		1348
569	/* queue check and possibly idle watchers */	1349	/* queue check watchers, to be executed first */
		1350	if (expect_false (checkcnt))
570	queue_events ((W *)checks, checkcnt, EV_CHECK);	1351	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
571		1352
572	call_pending ();	1353	call_pending (EV_A);
573	}
574	while (!ev_loop_done);
575		1354
576	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	{
577	ev_loop_done = 0;	1366	loop_done = how;
578	}	1367	}
579		1368
580	/*****************************************************************************/	1369	/*****************************************************************************/
581		1370
582	static void	1371	void inline_size
583	wlist_add (WL *head, WL elem)	1372	wlist_add (WL *head, WL elem)
584	{	1373	{
585	elem->next = *head;	1374	elem->next = *head;
586	*head = elem;	1375	*head = elem;
587	}	1376	}
588		1377
589	static void	1378	void inline_size
590	wlist_del (WL *head, WL elem)	1379	wlist_del (WL *head, WL elem)
591	{	1380	{
592	while (*head)	1381	while (*head)
593	{	1382	{
594	if (*head == elem)	1383	if (*head == elem)
…		…
599		1388
600	head = &(*head)->next;	1389	head = &(*head)->next;
601	}	1390	}
602	}	1391	}
603		1392
604	static void	1393	void inline_speed
		1394	ev_clear_pending (EV_P_ W w)
		1395	{
		1396	if (w->pending)
		1397	{
		1398	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1399	w->pending = 0;
		1400	}
		1401	}
		1402
		1403	void inline_speed
605	ev_start (W w, int active)	1404	ev_start (EV_P_ W w, int active)
606	{	1405	{
607	w->pending = 0;	1406	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1407	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1408
608	w->active = active;	1409	w->active = active;
		1410	ev_ref (EV_A);
609	}	1411	}
610		1412
611	static void	1413	void inline_size
612	ev_stop (W w)	1414	ev_stop (EV_P_ W w)
613	{	1415	{
614	if (w->pending)	1416	ev_unref (EV_A);
615	pendings [w->pending - 1].w = 0;
616
617	w->active = 0;	1417	w->active = 0;
618	}	1418	}
619		1419
620	/*****************************************************************************/	1420	/*****************************************************************************/
621		1421
622	void	1422	void
623	evio_start (struct ev_io *w)	1423	ev_io_start (EV_P_ ev_io *w)
624	{	1424	{
625	if (ev_is_active (w))
626	return;
627
628	int fd = w->fd;	1425	int fd = w->fd;
629		1426
		1427	if (expect_false (ev_is_active (w)))
		1428	return;
		1429
		1430	assert (("ev_io_start called with negative fd", fd >= 0));
		1431
630	ev_start ((W)w, 1);	1432	ev_start (EV_A_ (W)w, 1);
631	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1433	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
632	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1434	wlist_add ((WL *)&anfds[fd].head, (WL)w);
633		1435
634	++fdchangecnt;	1436	fd_change (EV_A_ fd);
635	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
636	fdchanges [fdchangecnt - 1] = fd;
637	}	1437	}
638		1438
639	void	1439	void
640	evio_stop (struct ev_io *w)	1440	ev_io_stop (EV_P_ ev_io *w)
641	{	1441	{
		1442	ev_clear_pending (EV_A_ (W)w);
642	if (!ev_is_active (w))	1443	if (expect_false (!ev_is_active (w)))
643	return;	1444	return;
		1445
		1446	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
644		1447
645	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1448	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
646	ev_stop ((W)w);	1449	ev_stop (EV_A_ (W)w);
647		1450
648	++fdchangecnt;	1451	fd_change (EV_A_ w->fd);
649	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
650	fdchanges [fdchangecnt - 1] = w->fd;
651	}	1452	}
652		1453
653
654	void	1454	void
655	evtimer_start (struct ev_timer *w)	1455	ev_timer_start (EV_P_ ev_timer *w)
656	{	1456	{
657	if (ev_is_active (w))	1457	if (expect_false (ev_is_active (w)))
658	return;	1458	return;
659		1459
660	w->at += now;	1460	((WT)w)->at += mn_now;
661		1461
662	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.));
663		1463
664	ev_start ((W)w, ++timercnt);	1464	ev_start (EV_A_ (W)w, ++timercnt);
665	array_needsize (timers, timermax, timercnt, );	1465	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
666	timers [timercnt - 1] = w;	1466	timers [timercnt - 1] = w;
667	upheap ((WT *)timers, timercnt - 1);	1467	upheap ((WT *)timers, timercnt - 1);
668	}
669		1468
		1469	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1470	}
		1471
670	void	1472	void
671	evtimer_stop (struct ev_timer *w)	1473	ev_timer_stop (EV_P_ ev_timer *w)
672	{	1474	{
		1475	ev_clear_pending (EV_A_ (W)w);
673	if (!ev_is_active (w))	1476	if (expect_false (!ev_is_active (w)))
674	return;	1477	return;
675		1478
		1479	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1480
676	if (w->active < timercnt--)	1481	if (expect_true (((W)w)->active < timercnt--))
677	{	1482	{
678	timers [w->active - 1] = timers [timercnt];	1483	timers [((W)w)->active - 1] = timers [timercnt];
679	downheap ((WT *)timers, timercnt, w->active - 1);	1484	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
680	}	1485	}
681		1486
682	w->at = w->repeat;	1487	((WT)w)->at -= mn_now;
683		1488
684	ev_stop ((W)w);	1489	ev_stop (EV_A_ (W)w);
685	}	1490	}
686		1491
687	void	1492	void
688	evtimer_again (struct ev_timer *w)	1493	ev_timer_again (EV_P_ ev_timer *w)
689	{	1494	{
690	if (ev_is_active (w))	1495	if (ev_is_active (w))
691	{	1496	{
692	if (w->repeat)	1497	if (w->repeat)
693	{	1498	{
694	w->at = now + w->repeat;	1499	((WT)w)->at = mn_now + w->repeat;
695	downheap ((WT *)timers, timercnt, w->active - 1);	1500	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
696	}	1501	}
697	else	1502	else
698	evtimer_stop (w);	1503	ev_timer_stop (EV_A_ w);
699	}	1504	}
700	else if (w->repeat)	1505	else if (w->repeat)
		1506	{
		1507	w->at = w->repeat;
701	evtimer_start (w);	1508	ev_timer_start (EV_A_ w);
		1509	}
702	}	1510	}
703		1511
		1512	#if EV_PERIODIC_ENABLE
704	void	1513	void
705	evperiodic_start (struct ev_periodic *w)	1514	ev_periodic_start (EV_P_ ev_periodic *w)
706	{	1515	{
707	if (ev_is_active (w))	1516	if (expect_false (ev_is_active (w)))
708	return;	1517	return;
709		1518
710	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1519	if (w->reschedule_cb)
711		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.));
712	/* 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 */
713	if (w->interval)
714	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	}
715		1527
716	ev_start ((W)w, ++periodiccnt);	1528	ev_start (EV_A_ (W)w, ++periodiccnt);
717	array_needsize (periodics, periodicmax, periodiccnt, );	1529	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
718	periodics [periodiccnt - 1] = w;	1530	periodics [periodiccnt - 1] = w;
719	upheap ((WT *)periodics, periodiccnt - 1);	1531	upheap ((WT *)periodics, periodiccnt - 1);
720	}
721		1532
		1533	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1534	}
		1535
722	void	1536	void
723	evperiodic_stop (struct ev_periodic *w)	1537	ev_periodic_stop (EV_P_ ev_periodic *w)
724	{	1538	{
		1539	ev_clear_pending (EV_A_ (W)w);
725	if (!ev_is_active (w))	1540	if (expect_false (!ev_is_active (w)))
726	return;	1541	return;
727		1542
		1543	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1544
728	if (w->active < periodiccnt--)	1545	if (expect_true (((W)w)->active < periodiccnt--))
729	{	1546	{
730	periodics [w->active - 1] = periodics [periodiccnt];	1547	periodics [((W)w)->active - 1] = periodics [periodiccnt];
731	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1548	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
732	}	1549	}
733		1550
734	ev_stop ((W)w);	1551	ev_stop (EV_A_ (W)w);
735	}	1552	}
736		1553
737	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
738	evsignal_start (struct ev_signal *w)	1649	ev_signal_start (EV_P_ ev_signal *w)
739	{	1650	{
		1651	#if EV_MULTIPLICITY
		1652	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1653	#endif
740	if (ev_is_active (w))	1654	if (expect_false (ev_is_active (w)))
741	return;	1655	return;
742		1656
		1657	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1658
743	ev_start ((W)w, 1);	1659	ev_start (EV_A_ (W)w, 1);
744	array_needsize (signals, signalmax, w->signum, signals_init);	1660	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
745	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1661	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
746		1662
747	if (!w->next)	1663	if (!((WL)w)->next)
748	{	1664	{
		1665	#if _WIN32
		1666	signal (w->signum, sighandler);
		1667	#else
749	struct sigaction sa;	1668	struct sigaction sa;
750	sa.sa_handler = sighandler;	1669	sa.sa_handler = sighandler;
751	sigfillset (&sa.sa_mask);	1670	sigfillset (&sa.sa_mask);
752	sa.sa_flags = 0;	1671	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
753	sigaction (w->signum, &sa, 0);	1672	sigaction (w->signum, &sa, 0);
		1673	#endif
754	}	1674	}
755	}	1675	}
756		1676
757	void	1677	void
758	evsignal_stop (struct ev_signal *w)	1678	ev_signal_stop (EV_P_ ev_signal *w)
759	{	1679	{
		1680	ev_clear_pending (EV_A_ (W)w);
760	if (!ev_is_active (w))	1681	if (expect_false (!ev_is_active (w)))
761	return;	1682	return;
762		1683
763	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1684	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
764	ev_stop ((W)w);	1685	ev_stop (EV_A_ (W)w);
765		1686
766	if (!signals [w->signum - 1].head)	1687	if (!signals [w->signum - 1].head)
767	signal (w->signum, SIG_DFL);	1688	signal (w->signum, SIG_DFL);
768	}	1689	}
769		1690
770	void evidle_start (struct ev_idle *w)	1691	void
		1692	ev_child_start (EV_P_ ev_child *w)
771	{	1693	{
		1694	#if EV_MULTIPLICITY
		1695	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1696	#endif
772	if (ev_is_active (w))	1697	if (expect_false (ev_is_active (w)))
773	return;	1698	return;
774		1699
775	ev_start ((W)w, ++idlecnt);	1700	ev_start (EV_A_ (W)w, 1);
776	array_needsize (idles, idlemax, idlecnt, );	1701	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
777	idles [idlecnt - 1] = w;
778	}	1702	}
779		1703
780	void evidle_stop (struct ev_idle *w)	1704	void
		1705	ev_child_stop (EV_P_ ev_child *w)
781	{	1706	{
782	idles [w->active - 1] = idles [--idlecnt];	1707	ev_clear_pending (EV_A_ (W)w);
		1708	if (expect_false (!ev_is_active (w)))
		1709	return;
		1710
		1711	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
783	ev_stop ((W)w);	1712	ev_stop (EV_A_ (W)w);
784	}	1713	}
785		1714
786	void evcheck_start (struct ev_check *w)	1715	#if EV_EMBED_ENABLE
		1716	void noinline
		1717	ev_embed_sweep (EV_P_ ev_embed *w)
787	{	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
788	if (ev_is_active (w))	1727	if (ev_cb (w))
789	return;	1728	ev_feed_event (EV_A_ (W)w, EV_EMBED);
790		1729	else
791	ev_start ((W)w, ++checkcnt);	1730	ev_embed_sweep (loop, w);
792	array_needsize (checks, checkmax, checkcnt, );
793	checks [checkcnt - 1] = w;
794	}	1731	}
795		1732
796	void evcheck_stop (struct ev_check *w)	1733	void
		1734	ev_embed_start (EV_P_ ev_embed *w)
797	{	1735	{
798	checks [w->active - 1] = checks [--checkcnt];	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
799	ev_stop ((W)w);	1760	ev_stop (EV_A_ (W)w);
800	}	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
801		1824
802	/*****************************************************************************/	1825	/*****************************************************************************/
803		1826
804	#if 0	1827	struct ev_once
805		1828	{
806	struct ev_io wio;	1829	ev_io io;
		1830	ev_timer to;
		1831	void (*cb)(int revents, void *arg);
		1832	void *arg;
		1833	};
807		1834
808	static void	1835	static void
809	sin_cb (struct ev_io *w, int revents)	1836	once_cb (EV_P_ struct ev_once *once, int revents)
810	{	1837	{
811	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1838	void (*cb)(int revents, void *arg) = once->cb;
		1839	void *arg = once->arg;
		1840
		1841	ev_io_stop (EV_A_ &once->io);
		1842	ev_timer_stop (EV_A_ &once->to);
		1843	ev_free (once);
		1844
		1845	cb (revents, arg);
812	}	1846	}
813		1847
814	static void	1848	static void
815	ocb (struct ev_timer *w, int revents)	1849	once_cb_io (EV_P_ ev_io *w, int revents)
816	{	1850	{
817	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1851	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
818	evtimer_stop (w);
819	evtimer_start (w);
820	}	1852	}
821		1853
822	static void	1854	static void
823	scb (struct ev_signal *w, int revents)	1855	once_cb_to (EV_P_ ev_timer *w, int revents)
824	{	1856	{
825	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	1857	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
826	evio_stop (&wio);
827	evio_start (&wio);
828	}	1858	}
829		1859
830	static void	1860	void
831	gcb (struct ev_signal *w, int revents)	1861	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
832	{	1862	{
833	fprintf (stderr, "generic %x\n", revents);	1863	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
834		1864
835	}	1865	if (expect_false (!once))
836
837	int main (void)
838	{
839	ev_init (0);
840
841	evio_init (&wio, sin_cb, 0, EV_READ);
842	evio_start (&wio);
843
844	struct ev_timer t[10000];
845
846	#if 0
847	int i;
848	for (i = 0; i < 10000; ++i)
849	{
850	struct ev_timer *w = t + i;
851	evw_init (w, ocb, i);
852	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
853	evtimer_start (w);
854	if (drand48 () < 0.5)
855	evtimer_stop (w);
856	}	1866	{
857	#endif	1867	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
858
859	struct ev_timer t1;
860	evtimer_init (&t1, ocb, 5, 10);
861	evtimer_start (&t1);
862
863	struct ev_signal sig;
864	evsignal_init (&sig, scb, SIGQUIT);
865	evsignal_start (&sig);
866
867	struct ev_check cw;
868	evcheck_init (&cw, gcb);
869	evcheck_start (&cw);
870
871	struct ev_idle iw;
872	evidle_init (&iw, gcb);
873	evidle_start (&iw);
874
875	ev_loop (0);
876
877	return 0;	1868	return;
878	}	1869	}
879		1870
880	#endif	1871	once->cb = cb;
		1872	once->arg = arg;
881		1873
		1874	ev_init (&once->io, once_cb_io);
		1875	if (fd >= 0)
		1876	{
		1877	ev_io_set (&once->io, fd, events);
		1878	ev_io_start (EV_A_ &once->io);
		1879	}
882		1880
		1881	ev_init (&once->to, once_cb_to);
		1882	if (timeout >= 0.)
		1883	{
		1884	ev_timer_set (&once->to, timeout, 0.);
		1885	ev_timer_start (EV_A_ &once->to);
		1886	}
		1887	}
883		1888
		1889	#ifdef __cplusplus
		1890	}
		1891	#endif
884		1892

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