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Comparing libev/ev.c (file contents):
Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC vs.
Revision 1.197 by root, Sat Dec 22 15:20:13 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_NANOSLEEP
		60	# if HAVE_NANOSLEEP
		61	# define EV_USE_NANOSLEEP 1
		62	# else
		63	# define EV_USE_NANOSLEEP 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_SELECT
		68	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		69	# define EV_USE_SELECT 1
		70	# else
		71	# define EV_USE_SELECT 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_POLL
		76	# if HAVE_POLL && HAVE_POLL_H
		77	# define EV_USE_POLL 1
		78	# else
		79	# define EV_USE_POLL 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_EPOLL
		84	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		85	# define EV_USE_EPOLL 1
		86	# else
		87	# define EV_USE_EPOLL 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_KQUEUE
		92	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		93	# define EV_USE_KQUEUE 1
		94	# else
		95	# define EV_USE_KQUEUE 0
		96	# endif
		97	# endif
		98
		99	# ifndef EV_USE_PORT
		100	# if HAVE_PORT_H && HAVE_PORT_CREATE
		101	# define EV_USE_PORT 1
		102	# else
		103	# define EV_USE_PORT 0
		104	# endif
		105	# endif
		106
		107	# ifndef EV_USE_INOTIFY
		108	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		109	# define EV_USE_INOTIFY 1
		110	# else
		111	# define EV_USE_INOTIFY 0
		112	# endif
		113	# endif
		114
		115	#endif
		116
1	#include <math.h>	117	#include <math.h>
2	#include <stdlib.h>	118	#include <stdlib.h>
3	#include <unistd.h>
4	#include <fcntl.h>	119	#include <fcntl.h>
5	#include <signal.h>
6	#include <stddef.h>	120	#include <stddef.h>
7		121
8	#include <stdio.h>	122	#include <stdio.h>
9		123
10	#include <assert.h>	124	#include <assert.h>
11	#include <errno.h>	125	#include <errno.h>
12	#include <sys/time.h>	126	#include <sys/types.h>
13	#include <time.h>	127	#include <time.h>
14		128
15	#define HAVE_EPOLL 1	129	#include <signal.h>
16		130
17	#ifndef HAVE_MONOTONIC	131	#ifdef EV_H
18	# ifdef CLOCK_MONOTONIC	132	# include EV_H
19	# define HAVE_MONOTONIC 1	133	#else
		134	# include "ev.h"
		135	#endif
		136
		137	#ifndef _WIN32
		138	# include <sys/time.h>
		139	# include <sys/wait.h>
		140	# include <unistd.h>
		141	#else
		142	# define WIN32_LEAN_AND_MEAN
		143	# include <windows.h>
		144	# ifndef EV_SELECT_IS_WINSOCKET
		145	# define EV_SELECT_IS_WINSOCKET 1
20	# endif	146	# endif
21	#endif	147	#endif
22		148
		149	/**/
		150
		151	#ifndef EV_USE_MONOTONIC
		152	# define EV_USE_MONOTONIC 0
		153	#endif
		154
		155	#ifndef EV_USE_REALTIME
		156	# define EV_USE_REALTIME 0
		157	#endif
		158
		159	#ifndef EV_USE_NANOSLEEP
		160	# define EV_USE_NANOSLEEP 0
		161	#endif
		162
23	#ifndef HAVE_SELECT	163	#ifndef EV_USE_SELECT
24	# define HAVE_SELECT 1	164	# define EV_USE_SELECT 1
		165	#endif
		166
		167	#ifndef EV_USE_POLL
		168	# ifdef _WIN32
		169	# define EV_USE_POLL 0
		170	# else
		171	# define EV_USE_POLL 1
25	#endif	172	# endif
		173	#endif
26		174
27	#ifndef HAVE_EPOLL	175	#ifndef EV_USE_EPOLL
28	# define HAVE_EPOLL 0	176	# define EV_USE_EPOLL 0
		177	#endif
		178
		179	#ifndef EV_USE_KQUEUE
		180	# define EV_USE_KQUEUE 0
		181	#endif
		182
		183	#ifndef EV_USE_PORT
		184	# define EV_USE_PORT 0
		185	#endif
		186
		187	#ifndef EV_USE_INOTIFY
		188	# define EV_USE_INOTIFY 0
		189	#endif
		190
		191	#ifndef EV_PID_HASHSIZE
		192	# if EV_MINIMAL
		193	# define EV_PID_HASHSIZE 1
		194	# else
		195	# define EV_PID_HASHSIZE 16
29	#endif	196	# endif
		197	#endif
30		198
31	#ifndef HAVE_REALTIME	199	#ifndef EV_INOTIFY_HASHSIZE
32	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	200	# if EV_MINIMAL
		201	# define EV_INOTIFY_HASHSIZE 1
		202	# else
		203	# define EV_INOTIFY_HASHSIZE 16
33	#endif	204	# endif
		205	#endif
		206
		207	/**/
		208
		209	#ifndef CLOCK_MONOTONIC
		210	# undef EV_USE_MONOTONIC
		211	# define EV_USE_MONOTONIC 0
		212	#endif
		213
		214	#ifndef CLOCK_REALTIME
		215	# undef EV_USE_REALTIME
		216	# define EV_USE_REALTIME 0
		217	#endif
		218
		219	#if !EV_STAT_ENABLE
		220	# undef EV_USE_INOTIFY
		221	# define EV_USE_INOTIFY 0
		222	#endif
		223
		224	#if !EV_USE_NANOSLEEP
		225	# ifndef _WIN32
		226	# include <sys/select.h>
		227	# endif
		228	#endif
		229
		230	#if EV_USE_INOTIFY
		231	# include <sys/inotify.h>
		232	#endif
		233
		234	#if EV_SELECT_IS_WINSOCKET
		235	# include <winsock.h>
		236	#endif
		237
		238	/**/
		239
		240	/*
		241	* This is used to avoid floating point rounding problems.
		242	* It is added to ev_rt_now when scheduling periodics
		243	* to ensure progress, time-wise, even when rounding
		244	* errors are against us.
		245	* This value is good at least till the year 4000.
		246	* Better solutions welcome.
		247	*/
		248	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
34		249
35	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	250	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
36	#define MAX_BLOCKTIME 60.	251	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		252	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
37		253
38	#include "ev.h"	254	#if __GNUC__ >= 4
		255	# define expect(expr,value) __builtin_expect ((expr),(value))
		256	# define noinline __attribute__ ((noinline))
		257	#else
		258	# define expect(expr,value) (expr)
		259	# define noinline
		260	# if __STDC_VERSION__ < 199901L
		261	# define inline
		262	# endif
		263	#endif
39		264
		265	#define expect_false(expr) expect ((expr) != 0, 0)
		266	#define expect_true(expr) expect ((expr) != 0, 1)
		267	#define inline_size static inline
		268
		269	#if EV_MINIMAL
		270	# define inline_speed static noinline
		271	#else
		272	# define inline_speed static inline
		273	#endif
		274
		275	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		276	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		277
		278	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		279	#define EMPTY2(a,b) /* used to suppress some warnings */
		280
40	typedef struct ev_watcher *W;	281	typedef ev_watcher *W;
41	typedef struct ev_watcher_list *WL;	282	typedef ev_watcher_list *WL;
42	typedef struct ev_watcher_time *WT;	283	typedef ev_watcher_time *WT;
43		284
44	static ev_tstamp now, diff; /* monotonic clock */	285	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		286	/* giving it a reasonably high chance of working on typical architetcures */
		287	static sig_atomic_t have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		288
		289	#ifdef _WIN32
		290	# include "ev_win32.c"
		291	#endif
		292
		293	/*****************************************************************************/
		294
		295	static void (*syserr_cb)(const char *msg);
		296
		297	void
		298	ev_set_syserr_cb (void (*cb)(const char *msg))
		299	{
		300	syserr_cb = cb;
		301	}
		302
		303	static void noinline
		304	syserr (const char *msg)
		305	{
		306	if (!msg)
		307	msg = "(libev) system error";
		308
		309	if (syserr_cb)
		310	syserr_cb (msg);
		311	else
		312	{
		313	perror (msg);
		314	abort ();
		315	}
		316	}
		317
		318	static void *(*alloc)(void *ptr, long size);
		319
		320	void
		321	ev_set_allocator (void *(*cb)(void *ptr, long size))
		322	{
		323	alloc = cb;
		324	}
		325
		326	inline_speed void *
		327	ev_realloc (void *ptr, long size)
		328	{
		329	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		330
		331	if (!ptr && size)
		332	{
		333	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		334	abort ();
		335	}
		336
		337	return ptr;
		338	}
		339
		340	#define ev_malloc(size) ev_realloc (0, (size))
		341	#define ev_free(ptr) ev_realloc ((ptr), 0)
		342
		343	/*****************************************************************************/
		344
		345	typedef struct
		346	{
		347	WL head;
		348	unsigned char events;
		349	unsigned char reify;
		350	#if EV_SELECT_IS_WINSOCKET
		351	SOCKET handle;
		352	#endif
		353	} ANFD;
		354
		355	typedef struct
		356	{
		357	W w;
		358	int events;
		359	} ANPENDING;
		360
		361	#if EV_USE_INOTIFY
		362	typedef struct
		363	{
		364	WL head;
		365	} ANFS;
		366	#endif
		367
		368	#if EV_MULTIPLICITY
		369
		370	struct ev_loop
		371	{
		372	ev_tstamp ev_rt_now;
		373	#define ev_rt_now ((loop)->ev_rt_now)
		374	#define VAR(name,decl) decl;
		375	#include "ev_vars.h"
		376	#undef VAR
		377	};
		378	#include "ev_wrap.h"
		379
		380	static struct ev_loop default_loop_struct;
		381	struct ev_loop *ev_default_loop_ptr;
		382
		383	#else
		384
45	ev_tstamp ev_now;	385	ev_tstamp ev_rt_now;
46	int ev_method;	386	#define VAR(name,decl) static decl;
		387	#include "ev_vars.h"
		388	#undef VAR
47		389
48	static int have_monotonic; /* runtime */	390	static int ev_default_loop_ptr;
49		391
50	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	392	#endif
51	static void (*method_modify)(int fd, int oev, int nev);
52	static void (*method_poll)(ev_tstamp timeout);
53		393
54	/*****************************************************************************/	394	/*****************************************************************************/
55		395
56	ev_tstamp	396	ev_tstamp
57	ev_time (void)	397	ev_time (void)
58	{	398	{
59	#if HAVE_REALTIME	399	#if EV_USE_REALTIME
60	struct timespec ts;	400	struct timespec ts;
61	clock_gettime (CLOCK_REALTIME, &ts);	401	clock_gettime (CLOCK_REALTIME, &ts);
62	return ts.tv_sec + ts.tv_nsec * 1e-9;	402	return ts.tv_sec + ts.tv_nsec * 1e-9;
63	#else	403	#else
64	struct timeval tv;	404	struct timeval tv;
65	gettimeofday (&tv, 0);	405	gettimeofday (&tv, 0);
66	return tv.tv_sec + tv.tv_usec * 1e-6;	406	return tv.tv_sec + tv.tv_usec * 1e-6;
67	#endif	407	#endif
68	}	408	}
69		409
70	static ev_tstamp	410	ev_tstamp inline_size
71	get_clock (void)	411	get_clock (void)
72	{	412	{
73	#if HAVE_MONOTONIC	413	#if EV_USE_MONOTONIC
74	if (have_monotonic)	414	if (expect_true (have_monotonic))
75	{	415	{
76	struct timespec ts;	416	struct timespec ts;
77	clock_gettime (CLOCK_MONOTONIC, &ts);	417	clock_gettime (CLOCK_MONOTONIC, &ts);
78	return ts.tv_sec + ts.tv_nsec * 1e-9;	418	return ts.tv_sec + ts.tv_nsec * 1e-9;
79	}	419	}
80	#endif	420	#endif
81		421
82	return ev_time ();	422	return ev_time ();
83	}	423	}
84		424
85	#define array_needsize(base,cur,cnt,init) \	425	#if EV_MULTIPLICITY
86	if ((cnt) > cur) \	426	ev_tstamp
87	{ \	427	ev_now (EV_P)
88	int newcnt = cur ? cur << 1 : 16; \	428	{
89	base = realloc (base, sizeof (*base) * (newcnt)); \	429	return ev_rt_now;
90	init (base + cur, newcnt - cur); \	430	}
91	cur = newcnt; \	431	#endif
		432
		433	void
		434	ev_sleep (ev_tstamp delay)
		435	{
		436	if (delay > 0.)
92	}	437	{
		438	#if EV_USE_NANOSLEEP
		439	struct timespec ts;
		440
		441	ts.tv_sec = (time_t)delay;
		442	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		443
		444	nanosleep (&ts, 0);
		445	#elif defined(_WIN32)
		446	Sleep (delay * 1e3);
		447	#else
		448	struct timeval tv;
		449
		450	tv.tv_sec = (time_t)delay;
		451	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		452
		453	select (0, 0, 0, 0, &tv);
		454	#endif
		455	}
		456	}
93		457
94	/*****************************************************************************/	458	/*****************************************************************************/
95		459
		460	int inline_size
		461	array_nextsize (int elem, int cur, int cnt)
		462	{
		463	int ncur = cur + 1;
		464
		465	do
		466	ncur <<= 1;
		467	while (cnt > ncur);
		468
		469	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		470	if (elem * ncur > 4096)
		471	{
		472	ncur *= elem;
		473	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		474	ncur = ncur - sizeof (void *) * 4;
		475	ncur /= elem;
		476	}
		477
		478	return ncur;
		479	}
		480
		481	static noinline void *
		482	array_realloc (int elem, void *base, int *cur, int cnt)
		483	{
		484	*cur = array_nextsize (elem, *cur, cnt);
		485	return ev_realloc (base, elem * *cur);
		486	}
		487
		488	#define array_needsize(type,base,cur,cnt,init) \
		489	if (expect_false ((cnt) > (cur))) \
		490	{ \
		491	int ocur_ = (cur); \
		492	(base) = (type *)array_realloc \
		493	(sizeof (type), (base), &(cur), (cnt)); \
		494	init ((base) + (ocur_), (cur) - ocur_); \
		495	}
		496
		497	#if 0
		498	#define array_slim(type,stem) \
		499	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		500	{ \
		501	stem ## max = array_roundsize (stem ## cnt >> 1); \
		502	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		503	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		504	}
		505	#endif
		506
		507	#define array_free(stem, idx) \
		508	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		509
		510	/*****************************************************************************/
		511
		512	void noinline
		513	ev_feed_event (EV_P_ void *w, int revents)
		514	{
		515	W w_ = (W)w;
		516	int pri = ABSPRI (w_);
		517
		518	if (expect_false (w_->pending))
		519	pendings [pri][w_->pending - 1].events |= revents;
		520	else
		521	{
		522	w_->pending = ++pendingcnt [pri];
		523	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		524	pendings [pri][w_->pending - 1].w = w_;
		525	pendings [pri][w_->pending - 1].events = revents;
		526	}
		527	}
		528
		529	void inline_speed
		530	queue_events (EV_P_ W *events, int eventcnt, int type)
		531	{
		532	int i;
		533
		534	for (i = 0; i < eventcnt; ++i)
		535	ev_feed_event (EV_A_ events [i], type);
		536	}
		537
		538	/*****************************************************************************/
		539
		540	void inline_size
		541	anfds_init (ANFD *base, int count)
		542	{
		543	while (count--)
		544	{
		545	base->head = 0;
		546	base->events = EV_NONE;
		547	base->reify = 0;
		548
		549	++base;
		550	}
		551	}
		552
		553	void inline_speed
		554	fd_event (EV_P_ int fd, int revents)
		555	{
		556	ANFD *anfd = anfds + fd;
		557	ev_io *w;
		558
		559	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		560	{
		561	int ev = w->events & revents;
		562
		563	if (ev)
		564	ev_feed_event (EV_A_ (W)w, ev);
		565	}
		566	}
		567
		568	void
		569	ev_feed_fd_event (EV_P_ int fd, int revents)
		570	{
		571	if (fd >= 0 && fd < anfdmax)
		572	fd_event (EV_A_ fd, revents);
		573	}
		574
		575	void inline_size
		576	fd_reify (EV_P)
		577	{
		578	int i;
		579
		580	for (i = 0; i < fdchangecnt; ++i)
		581	{
		582	int fd = fdchanges [i];
		583	ANFD *anfd = anfds + fd;
		584	ev_io *w;
		585
		586	unsigned char events = 0;
		587
		588	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		589	events |= (unsigned char)w->events;
		590
		591	#if EV_SELECT_IS_WINSOCKET
		592	if (events)
		593	{
		594	unsigned long argp;
		595	anfd->handle = _get_osfhandle (fd);
		596	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		597	}
		598	#endif
		599
		600	{
		601	unsigned char o_events = anfd->events;
		602	unsigned char o_reify = anfd->reify;
		603
		604	anfd->reify = 0;
		605	anfd->events = events;
		606
		607	if (o_events != events || o_reify & EV_IOFDSET)
		608	backend_modify (EV_A_ fd, o_events, events);
		609	}
		610	}
		611
		612	fdchangecnt = 0;
		613	}
		614
		615	void inline_size
		616	fd_change (EV_P_ int fd, int flags)
		617	{
		618	unsigned char reify = anfds [fd].reify;
		619	anfds [fd].reify |= flags;
		620
		621	if (expect_true (!reify))
		622	{
		623	++fdchangecnt;
		624	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		625	fdchanges [fdchangecnt - 1] = fd;
		626	}
		627	}
		628
		629	void inline_speed
		630	fd_kill (EV_P_ int fd)
		631	{
		632	ev_io *w;
		633
		634	while ((w = (ev_io *)anfds [fd].head))
		635	{
		636	ev_io_stop (EV_A_ w);
		637	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		638	}
		639	}
		640
		641	int inline_size
		642	fd_valid (int fd)
		643	{
		644	#ifdef _WIN32
		645	return _get_osfhandle (fd) != -1;
		646	#else
		647	return fcntl (fd, F_GETFD) != -1;
		648	#endif
		649	}
		650
		651	/* called on EBADF to verify fds */
		652	static void noinline
		653	fd_ebadf (EV_P)
		654	{
		655	int fd;
		656
		657	for (fd = 0; fd < anfdmax; ++fd)
		658	if (anfds [fd].events)
		659	if (!fd_valid (fd) == -1 && errno == EBADF)
		660	fd_kill (EV_A_ fd);
		661	}
		662
		663	/* called on ENOMEM in select/poll to kill some fds and retry */
		664	static void noinline
		665	fd_enomem (EV_P)
		666	{
		667	int fd;
		668
		669	for (fd = anfdmax; fd--; )
		670	if (anfds [fd].events)
		671	{
		672	fd_kill (EV_A_ fd);
		673	return;
		674	}
		675	}
		676
		677	/* usually called after fork if backend needs to re-arm all fds from scratch */
		678	static void noinline
		679	fd_rearm_all (EV_P)
		680	{
		681	int fd;
		682
		683	for (fd = 0; fd < anfdmax; ++fd)
		684	if (anfds [fd].events)
		685	{
		686	anfds [fd].events = 0;
		687	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		688	}
		689	}
		690
		691	/*****************************************************************************/
		692
		693	void inline_speed
		694	upheap (WT *heap, int k)
		695	{
		696	WT w = heap [k];
		697
		698	while (k)
		699	{
		700	int p = (k - 1) >> 1;
		701
		702	if (heap [p]->at <= w->at)
		703	break;
		704
		705	heap [k] = heap [p];
		706	((W)heap [k])->active = k + 1;
		707	k = p;
		708	}
		709
		710	heap [k] = w;
		711	((W)heap [k])->active = k + 1;
		712	}
		713
		714	void inline_speed
		715	downheap (WT *heap, int N, int k)
		716	{
		717	WT w = heap [k];
		718
		719	for (;;)
		720	{
		721	int c = (k << 1) + 1;
		722
		723	if (c >= N)
		724	break;
		725
		726	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		727	? 1 : 0;
		728
		729	if (w->at <= heap [c]->at)
		730	break;
		731
		732	heap [k] = heap [c];
		733	((W)heap [k])->active = k + 1;
		734
		735	k = c;
		736	}
		737
		738	heap [k] = w;
		739	((W)heap [k])->active = k + 1;
		740	}
		741
		742	void inline_size
		743	adjustheap (WT *heap, int N, int k)
		744	{
		745	upheap (heap, k);
		746	downheap (heap, N, k);
		747	}
		748
		749	/*****************************************************************************/
		750
96	typedef struct	751	typedef struct
97	{	752	{
98	struct ev_io *head;	753	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	if (w->active)
132	{
133	w->pending = ++pendingcnt;
134	array_needsize (pendings, pendingmax, pendingcnt, );
135	pendings [pendingcnt - 1].w = w;
136	pendings [pendingcnt - 1].events = events;
137	}
138	}
139
140	static void
141	fd_event (int fd, int events)
142	{
143	ANFD *anfd = anfds + fd;
144	struct ev_io *w;
145
146	for (w = anfd->head; w; w = w->next)
147	{
148	int ev = w->events & events;
149
150	if (ev)
151	event ((W)w, ev);
152	}
153	}
154
155	static void
156	queue_events (W *events, int eventcnt, int type)
157	{
158	int i;
159
160	for (i = 0; i < eventcnt; ++i)
161	event (events [i], type);
162	}
163
164	/*****************************************************************************/
165
166	static struct ev_timer **timers;
167	static int timermax, timercnt;
168
169	static struct ev_periodic **periodics;
170	static int periodicmax, periodiccnt;
171
172	static void
173	upheap (WT *timers, int k)
174	{
175	WT w = timers [k];
176
177	while (k && timers [k >> 1]->at > w->at)
178	{
179	timers [k] = timers [k >> 1];
180	timers [k]->active = k + 1;
181	k >>= 1;
182	}
183
184	timers [k] = w;
185	timers [k]->active = k + 1;
186
187	}
188
189	static void
190	downheap (WT *timers, int N, int k)
191	{
192	WT w = timers [k];
193
194	while (k < (N >> 1))
195	{
196	int j = k << 1;
197
198	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
199	++j;
200
201	if (w->at <= timers [j]->at)
202	break;
203
204	timers [k] = timers [j];
205	timers [k]->active = k + 1;
206	k = j;
207	}
208
209	timers [k] = w;
210	timers [k]->active = k + 1;
211	}
212
213	/*****************************************************************************/
214
215	typedef struct
216	{
217	struct ev_signal *head;
218	sig_atomic_t gotsig;	754	sig_atomic_t volatile gotsig;
219	} ANSIG;	755	} ANSIG;
220		756
221	static ANSIG *signals;	757	static ANSIG *signals;
222	static int signalmax;	758	static int signalmax;
223		759
224	static int sigpipe [2];	760	static int sigpipe [2];
225	static sig_atomic_t gotsig;	761	static sig_atomic_t volatile gotsig;
226	static struct ev_io sigev;	762	static ev_io sigev;
227		763
228	static void	764	void inline_size
229	signals_init (ANSIG *base, int count)	765	signals_init (ANSIG *base, int count)
230	{	766	{
231	while (count--)	767	while (count--)
232	{	768	{
233	base->head = 0;	769	base->head = 0;
234	base->gotsig = 0;	770	base->gotsig = 0;
		771
235	++base;	772	++base;
236	}	773	}
237	}	774	}
238		775
239	static void	776	static void
240	sighandler (int signum)	777	sighandler (int signum)
241	{	778	{
		779	#if _WIN32
		780	signal (signum, sighandler);
		781	#endif
		782
242	signals [signum - 1].gotsig = 1;	783	signals [signum - 1].gotsig = 1;
243		784
244	if (!gotsig)	785	if (!gotsig)
245	{	786	{
		787	int old_errno = errno;
246	gotsig = 1;	788	gotsig = 1;
247	write (sigpipe [1], &gotsig, 1);	789	write (sigpipe [1], &signum, 1);
		790	errno = old_errno;
248	}	791	}
		792	}
		793
		794	void noinline
		795	ev_feed_signal_event (EV_P_ int signum)
		796	{
		797	WL w;
		798
		799	#if EV_MULTIPLICITY
		800	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		801	#endif
		802
		803	--signum;
		804
		805	if (signum < 0 || signum >= signalmax)
		806	return;
		807
		808	signals [signum].gotsig = 0;
		809
		810	for (w = signals [signum].head; w; w = w->next)
		811	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
249	}	812	}
250		813
251	static void	814	static void
252	sigcb (struct ev_io *iow, int revents)	815	sigcb (EV_P_ ev_io *iow, int revents)
253	{	816	{
254	struct ev_signal *w;
255	int sig;	817	int signum;
256		818
		819	read (sigpipe [0], &revents, 1);
257	gotsig = 0;	820	gotsig = 0;
258	read (sigpipe [0], &revents, 1);
259		821
260	for (sig = signalmax; sig--; )	822	for (signum = signalmax; signum--; )
261	if (signals [sig].gotsig)	823	if (signals [signum].gotsig)
		824	ev_feed_signal_event (EV_A_ signum + 1);
		825	}
		826
		827	void inline_speed
		828	fd_intern (int fd)
		829	{
		830	#ifdef _WIN32
		831	int arg = 1;
		832	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		833	#else
		834	fcntl (fd, F_SETFD, FD_CLOEXEC);
		835	fcntl (fd, F_SETFL, O_NONBLOCK);
		836	#endif
		837	}
		838
		839	static void noinline
		840	siginit (EV_P)
		841	{
		842	fd_intern (sigpipe [0]);
		843	fd_intern (sigpipe [1]);
		844
		845	ev_io_set (&sigev, sigpipe [0], EV_READ);
		846	ev_io_start (EV_A_ &sigev);
		847	ev_unref (EV_A); /* child watcher should not keep loop alive */
		848	}
		849
		850	/*****************************************************************************/
		851
		852	static WL childs [EV_PID_HASHSIZE];
		853
		854	#ifndef _WIN32
		855
		856	static ev_signal childev;
		857
		858	void inline_speed
		859	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		860	{
		861	ev_child *w;
		862
		863	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		864	if (w->pid == pid || !w->pid)
262	{	865	{
263	signals [sig].gotsig = 0;	866	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
264		867	w->rpid = pid;
265	for (w = signals [sig].head; w; w = w->next)	868	w->rstatus = status;
266	event ((W)w, EV_SIGNAL);	869	ev_feed_event (EV_A_ (W)w, EV_CHILD);
267	}	870	}
268	}	871	}
269		872
		873	#ifndef WCONTINUED
		874	# define WCONTINUED 0
		875	#endif
		876
270	static void	877	static void
271	siginit (void)	878	childcb (EV_P_ ev_signal *sw, int revents)
272	{	879	{
273	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	880	int pid, status;
274	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
275		881
276	/* rather than sort out wether we really need nb, set it */	882	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
277	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	883	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
278	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	884	if (!WCONTINUED
		885	|| errno != EINVAL
		886	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		887	return;
279		888
280	evio_set (&sigev, sigpipe [0], EV_READ);	889	/* make sure we are called again until all childs have been reaped */
281	evio_start (&sigev);	890	/* we need to do it this way so that the callback gets called before we continue */
		891	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		892
		893	child_reap (EV_A_ sw, pid, pid, status);
		894	if (EV_PID_HASHSIZE > 1)
		895	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
282	}	896	}
		897
		898	#endif
283		899
284	/*****************************************************************************/	900	/*****************************************************************************/
285		901
286	static struct ev_idle **idles;	902	#if EV_USE_PORT
287	static int idlemax, idlecnt;	903	# include "ev_port.c"
		904	#endif
		905	#if EV_USE_KQUEUE
		906	# include "ev_kqueue.c"
		907	#endif
		908	#if EV_USE_EPOLL
		909	# include "ev_epoll.c"
		910	#endif
		911	#if EV_USE_POLL
		912	# include "ev_poll.c"
		913	#endif
		914	#if EV_USE_SELECT
		915	# include "ev_select.c"
		916	#endif
288		917
289	static struct ev_check **checks;	918	int
290	static int checkmax, checkcnt;	919	ev_version_major (void)
		920	{
		921	return EV_VERSION_MAJOR;
		922	}
		923
		924	int
		925	ev_version_minor (void)
		926	{
		927	return EV_VERSION_MINOR;
		928	}
		929
		930	/* return true if we are running with elevated privileges and should ignore env variables */
		931	int inline_size
		932	enable_secure (void)
		933	{
		934	#ifdef _WIN32
		935	return 0;
		936	#else
		937	return getuid () != geteuid ()
		938	|| getgid () != getegid ();
		939	#endif
		940	}
		941
		942	unsigned int
		943	ev_supported_backends (void)
		944	{
		945	unsigned int flags = 0;
		946
		947	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		948	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		949	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		950	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		951	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		952
		953	return flags;
		954	}
		955
		956	unsigned int
		957	ev_recommended_backends (void)
		958	{
		959	unsigned int flags = ev_supported_backends ();
		960
		961	#ifndef __NetBSD__
		962	/* kqueue is borked on everything but netbsd apparently */
		963	/* it usually doesn't work correctly on anything but sockets and pipes */
		964	flags &= ~EVBACKEND_KQUEUE;
		965	#endif
		966	#ifdef __APPLE__
		967	// flags &= ~EVBACKEND_KQUEUE; for documentation
		968	flags &= ~EVBACKEND_POLL;
		969	#endif
		970
		971	return flags;
		972	}
		973
		974	unsigned int
		975	ev_embeddable_backends (void)
		976	{
		977	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		978
		979	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		980	/* please fix it and tell me how to detect the fix */
		981	flags &= ~EVBACKEND_EPOLL;
		982
		983	return flags;
		984	}
		985
		986	unsigned int
		987	ev_backend (EV_P)
		988	{
		989	return backend;
		990	}
		991
		992	unsigned int
		993	ev_loop_count (EV_P)
		994	{
		995	return loop_count;
		996	}
		997
		998	void
		999	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1000	{
		1001	io_blocktime = interval;
		1002	}
		1003
		1004	void
		1005	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1006	{
		1007	timeout_blocktime = interval;
		1008	}
		1009
		1010	static void noinline
		1011	loop_init (EV_P_ unsigned int flags)
		1012	{
		1013	if (!backend)
		1014	{
		1015	#if EV_USE_MONOTONIC
		1016	{
		1017	struct timespec ts;
		1018	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		1019	have_monotonic = 1;
		1020	}
		1021	#endif
		1022
		1023	ev_rt_now = ev_time ();
		1024	mn_now = get_clock ();
		1025	now_floor = mn_now;
		1026	rtmn_diff = ev_rt_now - mn_now;
		1027
		1028	io_blocktime = 0.;
		1029	timeout_blocktime = 0.;
		1030
		1031	/* pid check not overridable via env */
		1032	#ifndef _WIN32
		1033	if (flags & EVFLAG_FORKCHECK)
		1034	curpid = getpid ();
		1035	#endif
		1036
		1037	if (!(flags & EVFLAG_NOENV)
		1038	&& !enable_secure ()
		1039	&& getenv ("LIBEV_FLAGS"))
		1040	flags = atoi (getenv ("LIBEV_FLAGS"));
		1041
		1042	if (!(flags & 0x0000ffffUL))
		1043	flags |= ev_recommended_backends ();
		1044
		1045	backend = 0;
		1046	backend_fd = -1;
		1047	#if EV_USE_INOTIFY
		1048	fs_fd = -2;
		1049	#endif
		1050
		1051	#if EV_USE_PORT
		1052	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1053	#endif
		1054	#if EV_USE_KQUEUE
		1055	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1056	#endif
		1057	#if EV_USE_EPOLL
		1058	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1059	#endif
		1060	#if EV_USE_POLL
		1061	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1062	#endif
		1063	#if EV_USE_SELECT
		1064	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		1065	#endif
		1066
		1067	ev_init (&sigev, sigcb);
		1068	ev_set_priority (&sigev, EV_MAXPRI);
		1069	}
		1070	}
		1071
		1072	static void noinline
		1073	loop_destroy (EV_P)
		1074	{
		1075	int i;
		1076
		1077	#if EV_USE_INOTIFY
		1078	if (fs_fd >= 0)
		1079	close (fs_fd);
		1080	#endif
		1081
		1082	if (backend_fd >= 0)
		1083	close (backend_fd);
		1084
		1085	#if EV_USE_PORT
		1086	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1087	#endif
		1088	#if EV_USE_KQUEUE
		1089	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1090	#endif
		1091	#if EV_USE_EPOLL
		1092	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1093	#endif
		1094	#if EV_USE_POLL
		1095	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1096	#endif
		1097	#if EV_USE_SELECT
		1098	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1099	#endif
		1100
		1101	for (i = NUMPRI; i--; )
		1102	{
		1103	array_free (pending, [i]);
		1104	#if EV_IDLE_ENABLE
		1105	array_free (idle, [i]);
		1106	#endif
		1107	}
		1108
		1109	ev_free (anfds); anfdmax = 0;
		1110
		1111	/* have to use the microsoft-never-gets-it-right macro */
		1112	array_free (fdchange, EMPTY);
		1113	array_free (timer, EMPTY);
		1114	#if EV_PERIODIC_ENABLE
		1115	array_free (periodic, EMPTY);
		1116	#endif
		1117	#if EV_FORK_ENABLE
		1118	array_free (fork, EMPTY);
		1119	#endif
		1120	array_free (prepare, EMPTY);
		1121	array_free (check, EMPTY);
		1122
		1123	backend = 0;
		1124	}
		1125
		1126	void inline_size infy_fork (EV_P);
		1127
		1128	void inline_size
		1129	loop_fork (EV_P)
		1130	{
		1131	#if EV_USE_PORT
		1132	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1133	#endif
		1134	#if EV_USE_KQUEUE
		1135	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1136	#endif
		1137	#if EV_USE_EPOLL
		1138	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1139	#endif
		1140	#if EV_USE_INOTIFY
		1141	infy_fork (EV_A);
		1142	#endif
		1143
		1144	if (ev_is_active (&sigev))
		1145	{
		1146	/* default loop */
		1147
		1148	ev_ref (EV_A);
		1149	ev_io_stop (EV_A_ &sigev);
		1150	close (sigpipe [0]);
		1151	close (sigpipe [1]);
		1152
		1153	while (pipe (sigpipe))
		1154	syserr ("(libev) error creating pipe");
		1155
		1156	siginit (EV_A);
		1157	}
		1158
		1159	postfork = 0;
		1160	}
		1161
		1162	#if EV_MULTIPLICITY
		1163	struct ev_loop *
		1164	ev_loop_new (unsigned int flags)
		1165	{
		1166	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1167
		1168	memset (loop, 0, sizeof (struct ev_loop));
		1169
		1170	loop_init (EV_A_ flags);
		1171
		1172	if (ev_backend (EV_A))
		1173	return loop;
		1174
		1175	return 0;
		1176	}
		1177
		1178	void
		1179	ev_loop_destroy (EV_P)
		1180	{
		1181	loop_destroy (EV_A);
		1182	ev_free (loop);
		1183	}
		1184
		1185	void
		1186	ev_loop_fork (EV_P)
		1187	{
		1188	postfork = 1;
		1189	}
		1190
		1191	#endif
		1192
		1193	#if EV_MULTIPLICITY
		1194	struct ev_loop *
		1195	ev_default_loop_init (unsigned int flags)
		1196	#else
		1197	int
		1198	ev_default_loop (unsigned int flags)
		1199	#endif
		1200	{
		1201	if (sigpipe [0] == sigpipe [1])
		1202	if (pipe (sigpipe))
		1203	return 0;
		1204
		1205	if (!ev_default_loop_ptr)
		1206	{
		1207	#if EV_MULTIPLICITY
		1208	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1209	#else
		1210	ev_default_loop_ptr = 1;
		1211	#endif
		1212
		1213	loop_init (EV_A_ flags);
		1214
		1215	if (ev_backend (EV_A))
		1216	{
		1217	siginit (EV_A);
		1218
		1219	#ifndef _WIN32
		1220	ev_signal_init (&childev, childcb, SIGCHLD);
		1221	ev_set_priority (&childev, EV_MAXPRI);
		1222	ev_signal_start (EV_A_ &childev);
		1223	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1224	#endif
		1225	}
		1226	else
		1227	ev_default_loop_ptr = 0;
		1228	}
		1229
		1230	return ev_default_loop_ptr;
		1231	}
		1232
		1233	void
		1234	ev_default_destroy (void)
		1235	{
		1236	#if EV_MULTIPLICITY
		1237	struct ev_loop *loop = ev_default_loop_ptr;
		1238	#endif
		1239
		1240	#ifndef _WIN32
		1241	ev_ref (EV_A); /* child watcher */
		1242	ev_signal_stop (EV_A_ &childev);
		1243	#endif
		1244
		1245	ev_ref (EV_A); /* signal watcher */
		1246	ev_io_stop (EV_A_ &sigev);
		1247
		1248	close (sigpipe [0]); sigpipe [0] = 0;
		1249	close (sigpipe [1]); sigpipe [1] = 0;
		1250
		1251	loop_destroy (EV_A);
		1252	}
		1253
		1254	void
		1255	ev_default_fork (void)
		1256	{
		1257	#if EV_MULTIPLICITY
		1258	struct ev_loop *loop = ev_default_loop_ptr;
		1259	#endif
		1260
		1261	if (backend)
		1262	postfork = 1;
		1263	}
291		1264
292	/*****************************************************************************/	1265	/*****************************************************************************/
293		1266
294	#if HAVE_EPOLL	1267	void
295	# include "ev_epoll.c"	1268	ev_invoke (EV_P_ void *w, int revents)
296	#endif
297	#if HAVE_SELECT
298	# include "ev_select.c"
299	#endif
300
301	int ev_init (int flags)
302	{	1269	{
303	#if HAVE_MONOTONIC	1270	EV_CB_INVOKE ((W)w, revents);
304	{
305	struct timespec ts;
306	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
307	have_monotonic = 1;
308	}
309	#endif
310
311	ev_now = ev_time ();
312	now = get_clock ();
313	diff = ev_now - now;
314
315	if (pipe (sigpipe))
316	return 0;
317
318	ev_method = EVMETHOD_NONE;
319	#if HAVE_EPOLL
320	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
321	#endif
322	#if HAVE_SELECT
323	if (ev_method == EVMETHOD_NONE) select_init (flags);
324	#endif
325
326	if (ev_method)
327	{
328	evw_init (&sigev, sigcb);
329	siginit ();
330	}
331
332	return ev_method;
333	}	1271	}
334		1272
335	/*****************************************************************************/	1273	void inline_speed
336		1274	call_pending (EV_P)
337	void ev_prefork (void)
338	{	1275	{
339	/* nop */
340	}
341
342	void ev_postfork_parent (void)
343	{
344	/* nop */
345	}
346
347	void ev_postfork_child (void)
348	{
349	#if HAVE_EPOLL
350	if (ev_method == EVMETHOD_EPOLL)
351	epoll_postfork_child ();
352	#endif
353
354	evio_stop (&sigev);
355	close (sigpipe [0]);
356	close (sigpipe [1]);
357	pipe (sigpipe);
358	siginit ();
359	}
360
361	/*****************************************************************************/
362
363	static void
364	fd_reify (void)
365	{
366	int i;	1276	int pri;
367		1277
368	for (i = 0; i < fdchangecnt; ++i)	1278	for (pri = NUMPRI; pri--; )
		1279	while (pendingcnt [pri])
369	{	1280	{
370	int fd = fdchanges [i];	1281	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
371	ANFD *anfd = anfds + fd;
372	struct ev_io *w;
373		1282
374	int wev = 0;	1283	if (expect_true (p->w))
375
376	for (w = anfd->head; w; w = w->next)
377	wev |= w->events;
378
379	if (anfd->wev != wev)
380	{	1284	{
381	method_modify (fd, anfd->wev, wev);	1285	/*assert (("non-pending watcher on pending list", p->w->pending));*/
382	anfd->wev = wev;
383	}
384	}
385		1286
386	fdchangecnt = 0;
387	}
388
389	static void
390	call_pending ()
391	{
392	int i;
393
394	for (i = 0; i < pendingcnt; ++i)
395	{
396	ANPENDING *p = pendings + i;
397
398	if (p->w)
399	{
400	p->w->pending = 0;	1287	p->w->pending = 0;
401	p->w->cb (p->w, p->events);	1288	EV_CB_INVOKE (p->w, p->events);
402	}	1289	}
403	}	1290	}
404
405	pendingcnt = 0;
406	}	1291	}
407		1292
408	static void	1293	void inline_size
409	timers_reify ()	1294	timers_reify (EV_P)
410	{	1295	{
411	while (timercnt && timers [0]->at <= now)	1296	while (timercnt && ((WT)timers [0])->at <= mn_now)
412	{	1297	{
413	struct ev_timer *w = timers [0];	1298	ev_timer *w = (ev_timer *)timers [0];
414		1299
415	event ((W)w, EV_TIMEOUT);	1300	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
416		1301
417	/* first reschedule or stop timer */	1302	/* first reschedule or stop timer */
418	if (w->repeat)	1303	if (w->repeat)
419	{	1304	{
		1305	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1306
420	w->at = now + w->repeat;	1307	((WT)w)->at += w->repeat;
421	assert (("timer timeout in the past, negative repeat?", w->at > now));	1308	if (((WT)w)->at < mn_now)
		1309	((WT)w)->at = mn_now;
		1310
422	downheap ((WT *)timers, timercnt, 0);	1311	downheap (timers, timercnt, 0);
423	}	1312	}
424	else	1313	else
425	evtimer_stop (w); /* nonrepeating: stop timer */	1314	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
426	}
427	}
428		1315
429	static void	1316	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1317	}
		1318	}
		1319
		1320	#if EV_PERIODIC_ENABLE
		1321	void inline_size
430	periodics_reify ()	1322	periodics_reify (EV_P)
431	{	1323	{
432	while (periodiccnt && periodics [0]->at <= ev_now)	1324	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
433	{	1325	{
434	struct ev_periodic *w = periodics [0];	1326	ev_periodic *w = (ev_periodic *)periodics [0];
		1327
		1328	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
435		1329
436	/* first reschedule or stop timer */	1330	/* first reschedule or stop timer */
437	if (w->interval)	1331	if (w->reschedule_cb)
438	{	1332	{
439	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1333	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
440	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1334	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
441	downheap ((WT *)periodics, periodiccnt, 0);	1335	downheap (periodics, periodiccnt, 0);
		1336	}
		1337	else if (w->interval)
		1338	{
		1339	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1340	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
		1341	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1342	downheap (periodics, periodiccnt, 0);
442	}	1343	}
443	else	1344	else
444	evperiodic_stop (w); /* nonrepeating: stop timer */	1345	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
445		1346
446	event ((W)w, EV_TIMEOUT);	1347	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
447	}	1348	}
448	}	1349	}
449		1350
450	static void	1351	static void noinline
451	periodics_reschedule (ev_tstamp diff)	1352	periodics_reschedule (EV_P)
452	{	1353	{
453	int i;	1354	int i;
454		1355
455	/* adjust periodics after time jump */	1356	/* adjust periodics after time jump */
456	for (i = 0; i < periodiccnt; ++i)	1357	for (i = 0; i < periodiccnt; ++i)
457	{	1358	{
458	struct ev_periodic *w = periodics [i];	1359	ev_periodic *w = (ev_periodic *)periodics [i];
459		1360
		1361	if (w->reschedule_cb)
		1362	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
460	if (w->interval)	1363	else if (w->interval)
		1364	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1365	}
		1366
		1367	/* now rebuild the heap */
		1368	for (i = periodiccnt >> 1; i--; )
		1369	downheap (periodics, periodiccnt, i);
		1370	}
		1371	#endif
		1372
		1373	#if EV_IDLE_ENABLE
		1374	void inline_size
		1375	idle_reify (EV_P)
		1376	{
		1377	if (expect_false (idleall))
		1378	{
		1379	int pri;
		1380
		1381	for (pri = NUMPRI; pri--; )
461	{	1382	{
462	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1383	if (pendingcnt [pri])
		1384	break;
463		1385
464	if (fabs (diff) >= 1e-4)	1386	if (idlecnt [pri])
465	{	1387	{
466	evperiodic_stop (w);	1388	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
467	evperiodic_start (w);	1389	break;
468
469	i = 0; /* restart loop, inefficient, but time jumps should be rare */
470	}	1390	}
471	}	1391	}
472	}	1392	}
473	}	1393	}
		1394	#endif
474		1395
475	static void	1396	void inline_speed
476	time_update ()	1397	time_update (EV_P_ ev_tstamp max_block)
477	{	1398	{
478	int i;	1399	int i;
479		1400
480	ev_now = ev_time ();	1401	#if EV_USE_MONOTONIC
481
482	if (have_monotonic)	1402	if (expect_true (have_monotonic))
483	{	1403	{
484	ev_tstamp odiff = diff;	1404	ev_tstamp odiff = rtmn_diff;
485		1405
486	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1406	mn_now = get_clock ();
		1407
		1408	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1409	/* interpolate in the meantime */
		1410	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
487	{	1411	{
488	now = get_clock ();	1412	ev_rt_now = rtmn_diff + mn_now;
		1413	return;
		1414	}
		1415
		1416	now_floor = mn_now;
		1417	ev_rt_now = ev_time ();
		1418
		1419	/* loop a few times, before making important decisions.
		1420	* on the choice of "4": one iteration isn't enough,
		1421	* in case we get preempted during the calls to
		1422	* ev_time and get_clock. a second call is almost guaranteed
		1423	* to succeed in that case, though. and looping a few more times
		1424	* doesn't hurt either as we only do this on time-jumps or
		1425	* in the unlikely event of having been preempted here.
		1426	*/
		1427	for (i = 4; --i; )
		1428	{
489	diff = ev_now - now;	1429	rtmn_diff = ev_rt_now - mn_now;
490		1430
491	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1431	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
492	return; /* all is well */	1432	return; /* all is well */
493		1433
494	ev_now = ev_time ();	1434	ev_rt_now = ev_time ();
		1435	mn_now = get_clock ();
		1436	now_floor = mn_now;
495	}	1437	}
496		1438
		1439	# if EV_PERIODIC_ENABLE
497	periodics_reschedule (diff - odiff);	1440	periodics_reschedule (EV_A);
		1441	# endif
498	/* no timer adjustment, as the monotonic clock doesn't jump */	1442	/* no timer adjustment, as the monotonic clock doesn't jump */
		1443	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
499	}	1444	}
500	else	1445	else
		1446	#endif
501	{	1447	{
502	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1448	ev_rt_now = ev_time ();
		1449
		1450	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
503	{	1451	{
		1452	#if EV_PERIODIC_ENABLE
504	periodics_reschedule (ev_now - now);	1453	periodics_reschedule (EV_A);
505		1454	#endif
506	/* adjust timers. this is easy, as the offset is the same for all */	1455	/* adjust timers. this is easy, as the offset is the same for all of them */
507	for (i = 0; i < timercnt; ++i)	1456	for (i = 0; i < timercnt; ++i)
508	timers [i]->at += diff;	1457	((WT)timers [i])->at += ev_rt_now - mn_now;
509	}	1458	}
510		1459
511	now = ev_now;	1460	mn_now = ev_rt_now;
512	}
513	}
514
515	int ev_loop_done;
516
517	void ev_loop (int flags)
518	{
519	double block;
520	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
521
522	if (checkcnt)
523	{	1461	}
524	queue_events ((W *)checks, checkcnt, EV_CHECK);	1462	}
525	call_pending ();	1463
526	}	1464	void
		1465	ev_ref (EV_P)
		1466	{
		1467	++activecnt;
		1468	}
		1469
		1470	void
		1471	ev_unref (EV_P)
		1472	{
		1473	--activecnt;
		1474	}
		1475
		1476	static int loop_done;
		1477
		1478	void
		1479	ev_loop (EV_P_ int flags)
		1480	{
		1481	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1482	? EVUNLOOP_ONE
		1483	: EVUNLOOP_CANCEL;
		1484
		1485	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
527		1486
528	do	1487	do
529	{	1488	{
		1489	#ifndef _WIN32
		1490	if (expect_false (curpid)) /* penalise the forking check even more */
		1491	if (expect_false (getpid () != curpid))
		1492	{
		1493	curpid = getpid ();
		1494	postfork = 1;
		1495	}
		1496	#endif
		1497
		1498	#if EV_FORK_ENABLE
		1499	/* we might have forked, so queue fork handlers */
		1500	if (expect_false (postfork))
		1501	if (forkcnt)
		1502	{
		1503	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1504	call_pending (EV_A);
		1505	}
		1506	#endif
		1507
		1508	/* queue prepare watchers (and execute them) */
		1509	if (expect_false (preparecnt))
		1510	{
		1511	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1512	call_pending (EV_A);
		1513	}
		1514
		1515	if (expect_false (!activecnt))
		1516	break;
		1517
		1518	/* we might have forked, so reify kernel state if necessary */
		1519	if (expect_false (postfork))
		1520	loop_fork (EV_A);
		1521
530	/* update fd-related kernel structures */	1522	/* update fd-related kernel structures */
531	fd_reify ();	1523	fd_reify (EV_A);
532		1524
533	/* calculate blocking time */	1525	/* calculate blocking time */
		1526	{
		1527	ev_tstamp waittime = 0.;
		1528	ev_tstamp sleeptime = 0.;
534		1529
535	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1530	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
536	ev_now = ev_time ();
537
538	if (flags & EVLOOP_NONBLOCK || idlecnt)
539	block = 0.;
540	else
541	{	1531	{
		1532	/* update time to cancel out callback processing overhead */
		1533	time_update (EV_A_ 1e100);
		1534
542	block = MAX_BLOCKTIME;	1535	waittime = MAX_BLOCKTIME;
543		1536
544	if (timercnt)	1537	if (timercnt)
545	{	1538	{
546	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1539	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
547	if (block > to) block = to;	1540	if (waittime > to) waittime = to;
548	}	1541	}
549		1542
		1543	#if EV_PERIODIC_ENABLE
550	if (periodiccnt)	1544	if (periodiccnt)
551	{	1545	{
552	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1546	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
553	if (block > to) block = to;	1547	if (waittime > to) waittime = to;
554	}	1548	}
		1549	#endif
555		1550
556	if (block < 0.) block = 0.;	1551	if (expect_false (waittime < timeout_blocktime))
		1552	waittime = timeout_blocktime;
		1553
		1554	sleeptime = waittime - backend_fudge;
		1555
		1556	if (expect_true (sleeptime > io_blocktime))
		1557	sleeptime = io_blocktime;
		1558
		1559	if (sleeptime)
		1560	{
		1561	ev_sleep (sleeptime);
		1562	waittime -= sleeptime;
		1563	}
557	}	1564	}
558		1565
559	method_poll (block);	1566	++loop_count;
		1567	backend_poll (EV_A_ waittime);
560		1568
561	/* update ev_now, do magic */	1569	/* update ev_rt_now, do magic */
562	time_update ();	1570	time_update (EV_A_ waittime + sleeptime);
		1571	}
563		1572
564	/* queue pending timers and reschedule them */	1573	/* queue pending timers and reschedule them */
		1574	timers_reify (EV_A); /* relative timers called last */
		1575	#if EV_PERIODIC_ENABLE
565	periodics_reify (); /* absolute timers first */	1576	periodics_reify (EV_A); /* absolute timers called first */
566	timers_reify (); /* relative timers second */	1577	#endif
567		1578
		1579	#if EV_IDLE_ENABLE
568	/* queue idle watchers unless io or timers are pending */	1580	/* queue idle watchers unless other events are pending */
569	if (!pendingcnt)	1581	idle_reify (EV_A);
570	queue_events ((W *)idles, idlecnt, EV_IDLE);	1582	#endif
571		1583
572	/* queue check and possibly idle watchers */	1584	/* queue check watchers, to be executed first */
		1585	if (expect_false (checkcnt))
573	queue_events ((W *)checks, checkcnt, EV_CHECK);	1586	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
574		1587
575	call_pending ();	1588	call_pending (EV_A);
576	}
577	while (!ev_loop_done);
578		1589
579	if (ev_loop_done != 2)	1590	}
		1591	while (expect_true (activecnt && !loop_done));
		1592
		1593	if (loop_done == EVUNLOOP_ONE)
		1594	loop_done = EVUNLOOP_CANCEL;
		1595	}
		1596
		1597	void
		1598	ev_unloop (EV_P_ int how)
		1599	{
580	ev_loop_done = 0;	1600	loop_done = how;
581	}	1601	}
582		1602
583	/*****************************************************************************/	1603	/*****************************************************************************/
584		1604
585	static void	1605	void inline_size
586	wlist_add (WL *head, WL elem)	1606	wlist_add (WL *head, WL elem)
587	{	1607	{
588	elem->next = *head;	1608	elem->next = *head;
589	*head = elem;	1609	*head = elem;
590	}	1610	}
591		1611
592	static void	1612	void inline_size
593	wlist_del (WL *head, WL elem)	1613	wlist_del (WL *head, WL elem)
594	{	1614	{
595	while (*head)	1615	while (*head)
596	{	1616	{
597	if (*head == elem)	1617	if (*head == elem)
…		…
602		1622
603	head = &(*head)->next;	1623	head = &(*head)->next;
604	}	1624	}
605	}	1625	}
606		1626
607	static void	1627	void inline_speed
608	ev_clear (W w)	1628	clear_pending (EV_P_ W w)
609	{	1629	{
610	if (w->pending)	1630	if (w->pending)
611	{	1631	{
612	pendings [w->pending - 1].w = 0;	1632	pendings [ABSPRI (w)][w->pending - 1].w = 0;
613	w->pending = 0;	1633	w->pending = 0;
614	}	1634	}
615	}	1635	}
616		1636
617	static void	1637	int
		1638	ev_clear_pending (EV_P_ void *w)
		1639	{
		1640	W w_ = (W)w;
		1641	int pending = w_->pending;
		1642
		1643	if (expect_true (pending))
		1644	{
		1645	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1646	w_->pending = 0;
		1647	p->w = 0;
		1648	return p->events;
		1649	}
		1650	else
		1651	return 0;
		1652	}
		1653
		1654	void inline_size
		1655	pri_adjust (EV_P_ W w)
		1656	{
		1657	int pri = w->priority;
		1658	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1659	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1660	w->priority = pri;
		1661	}
		1662
		1663	void inline_speed
618	ev_start (W w, int active)	1664	ev_start (EV_P_ W w, int active)
619	{	1665	{
		1666	pri_adjust (EV_A_ w);
620	w->active = active;	1667	w->active = active;
		1668	ev_ref (EV_A);
621	}	1669	}
622		1670
623	static void	1671	void inline_size
624	ev_stop (W w)	1672	ev_stop (EV_P_ W w)
625	{	1673	{
		1674	ev_unref (EV_A);
626	w->active = 0;	1675	w->active = 0;
627	}	1676	}
628		1677
629	/*****************************************************************************/	1678	/*****************************************************************************/
630		1679
631	void	1680	void noinline
632	evio_start (struct ev_io *w)	1681	ev_io_start (EV_P_ ev_io *w)
633	{	1682	{
634	if (ev_is_active (w))
635	return;
636
637	int fd = w->fd;	1683	int fd = w->fd;
638		1684
		1685	if (expect_false (ev_is_active (w)))
		1686	return;
		1687
		1688	assert (("ev_io_start called with negative fd", fd >= 0));
		1689
639	ev_start ((W)w, 1);	1690	ev_start (EV_A_ (W)w, 1);
640	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1691	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
641	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1692	wlist_add (&anfds[fd].head, (WL)w);
642		1693
643	++fdchangecnt;	1694	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
644	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	1695	w->events &= ~EV_IOFDSET;
645	fdchanges [fdchangecnt - 1] = fd;
646	}	1696	}
647		1697
648	void	1698	void noinline
649	evio_stop (struct ev_io *w)	1699	ev_io_stop (EV_P_ ev_io *w)
650	{	1700	{
651	ev_clear ((W)w);	1701	clear_pending (EV_A_ (W)w);
652	if (!ev_is_active (w))	1702	if (expect_false (!ev_is_active (w)))
653	return;	1703	return;
654		1704
		1705	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1706
655	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1707	wlist_del (&anfds[w->fd].head, (WL)w);
656	ev_stop ((W)w);	1708	ev_stop (EV_A_ (W)w);
657		1709
658	++fdchangecnt;	1710	fd_change (EV_A_ w->fd, 1);
659	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
660	fdchanges [fdchangecnt - 1] = w->fd;
661	}	1711	}
662		1712
663	void	1713	void noinline
664	evtimer_start (struct ev_timer *w)	1714	ev_timer_start (EV_P_ ev_timer *w)
665	{	1715	{
666	if (ev_is_active (w))	1716	if (expect_false (ev_is_active (w)))
667	return;	1717	return;
668		1718
669	w->at += now;	1719	((WT)w)->at += mn_now;
670		1720
671	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1721	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
672		1722
673	ev_start ((W)w, ++timercnt);	1723	ev_start (EV_A_ (W)w, ++timercnt);
674	array_needsize (timers, timermax, timercnt, );	1724	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
675	timers [timercnt - 1] = w;	1725	timers [timercnt - 1] = (WT)w;
676	upheap ((WT *)timers, timercnt - 1);	1726	upheap (timers, timercnt - 1);
677	}
678		1727
679	void	1728	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1729	}
		1730
		1731	void noinline
680	evtimer_stop (struct ev_timer *w)	1732	ev_timer_stop (EV_P_ ev_timer *w)
681	{	1733	{
682	ev_clear ((W)w);	1734	clear_pending (EV_A_ (W)w);
683	if (!ev_is_active (w))	1735	if (expect_false (!ev_is_active (w)))
684	return;	1736	return;
685		1737
686	if (w->active < timercnt--)	1738	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1739
		1740	{
		1741	int active = ((W)w)->active;
		1742
		1743	if (expect_true (--active < --timercnt))
687	{	1744	{
688	timers [w->active - 1] = timers [timercnt];	1745	timers [active] = timers [timercnt];
689	downheap ((WT *)timers, timercnt, w->active - 1);	1746	adjustheap (timers, timercnt, active);
690	}	1747	}
		1748	}
691		1749
692	w->at = w->repeat;	1750	((WT)w)->at -= mn_now;
693		1751
694	ev_stop ((W)w);	1752	ev_stop (EV_A_ (W)w);
695	}	1753	}
696		1754
697	void	1755	void noinline
698	evtimer_again (struct ev_timer *w)	1756	ev_timer_again (EV_P_ ev_timer *w)
699	{	1757	{
700	if (ev_is_active (w))	1758	if (ev_is_active (w))
701	{	1759	{
702	if (w->repeat)	1760	if (w->repeat)
703	{	1761	{
704	w->at = now + w->repeat;	1762	((WT)w)->at = mn_now + w->repeat;
705	downheap ((WT *)timers, timercnt, w->active - 1);	1763	adjustheap (timers, timercnt, ((W)w)->active - 1);
706	}	1764	}
707	else	1765	else
708	evtimer_stop (w);	1766	ev_timer_stop (EV_A_ w);
709	}	1767	}
710	else if (w->repeat)	1768	else if (w->repeat)
		1769	{
		1770	w->at = w->repeat;
711	evtimer_start (w);	1771	ev_timer_start (EV_A_ w);
		1772	}
712	}	1773	}
713		1774
714	void	1775	#if EV_PERIODIC_ENABLE
		1776	void noinline
715	evperiodic_start (struct ev_periodic *w)	1777	ev_periodic_start (EV_P_ ev_periodic *w)
716	{	1778	{
717	if (ev_is_active (w))	1779	if (expect_false (ev_is_active (w)))
718	return;	1780	return;
719		1781
720	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1782	if (w->reschedule_cb)
721		1783	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1784	else if (w->interval)
		1785	{
		1786	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
722	/* this formula differs from the one in periodic_reify because we do not always round up */	1787	/* this formula differs from the one in periodic_reify because we do not always round up */
723	if (w->interval)
724	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1788	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1789	}
		1790	else
		1791	((WT)w)->at = w->offset;
725		1792
726	ev_start ((W)w, ++periodiccnt);	1793	ev_start (EV_A_ (W)w, ++periodiccnt);
727	array_needsize (periodics, periodicmax, periodiccnt, );	1794	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
728	periodics [periodiccnt - 1] = w;	1795	periodics [periodiccnt - 1] = (WT)w;
729	upheap ((WT *)periodics, periodiccnt - 1);	1796	upheap (periodics, periodiccnt - 1);
730	}
731		1797
732	void	1798	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1799	}
		1800
		1801	void noinline
733	evperiodic_stop (struct ev_periodic *w)	1802	ev_periodic_stop (EV_P_ ev_periodic *w)
734	{	1803	{
735	ev_clear ((W)w);	1804	clear_pending (EV_A_ (W)w);
736	if (!ev_is_active (w))	1805	if (expect_false (!ev_is_active (w)))
737	return;	1806	return;
738		1807
739	if (w->active < periodiccnt--)	1808	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1809
		1810	{
		1811	int active = ((W)w)->active;
		1812
		1813	if (expect_true (--active < --periodiccnt))
740	{	1814	{
741	periodics [w->active - 1] = periodics [periodiccnt];	1815	periodics [active] = periodics [periodiccnt];
742	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1816	adjustheap (periodics, periodiccnt, active);
743	}	1817	}
		1818	}
744		1819
745	ev_stop ((W)w);	1820	ev_stop (EV_A_ (W)w);
746	}	1821	}
747		1822
748	void	1823	void noinline
		1824	ev_periodic_again (EV_P_ ev_periodic *w)
		1825	{
		1826	/* TODO: use adjustheap and recalculation */
		1827	ev_periodic_stop (EV_A_ w);
		1828	ev_periodic_start (EV_A_ w);
		1829	}
		1830	#endif
		1831
		1832	#ifndef SA_RESTART
		1833	# define SA_RESTART 0
		1834	#endif
		1835
		1836	void noinline
749	evsignal_start (struct ev_signal *w)	1837	ev_signal_start (EV_P_ ev_signal *w)
750	{	1838	{
		1839	#if EV_MULTIPLICITY
		1840	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1841	#endif
751	if (ev_is_active (w))	1842	if (expect_false (ev_is_active (w)))
752	return;	1843	return;
753		1844
754	ev_start ((W)w, 1);	1845	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1846
		1847	{
		1848	#ifndef _WIN32
		1849	sigset_t full, prev;
		1850	sigfillset (&full);
		1851	sigprocmask (SIG_SETMASK, &full, &prev);
		1852	#endif
		1853
755	array_needsize (signals, signalmax, w->signum, signals_init);	1854	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1855
		1856	#ifndef _WIN32
		1857	sigprocmask (SIG_SETMASK, &prev, 0);
		1858	#endif
		1859	}
		1860
		1861	ev_start (EV_A_ (W)w, 1);
756	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1862	wlist_add (&signals [w->signum - 1].head, (WL)w);
757		1863
758	if (!w->next)	1864	if (!((WL)w)->next)
759	{	1865	{
		1866	#if _WIN32
		1867	signal (w->signum, sighandler);
		1868	#else
760	struct sigaction sa;	1869	struct sigaction sa;
761	sa.sa_handler = sighandler;	1870	sa.sa_handler = sighandler;
762	sigfillset (&sa.sa_mask);	1871	sigfillset (&sa.sa_mask);
763	sa.sa_flags = 0;	1872	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
764	sigaction (w->signum, &sa, 0);	1873	sigaction (w->signum, &sa, 0);
		1874	#endif
765	}	1875	}
766	}	1876	}
767		1877
768	void	1878	void noinline
769	evsignal_stop (struct ev_signal *w)	1879	ev_signal_stop (EV_P_ ev_signal *w)
770	{	1880	{
771	ev_clear ((W)w);	1881	clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1882	if (expect_false (!ev_is_active (w)))
773	return;	1883	return;
774		1884
775	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1885	wlist_del (&signals [w->signum - 1].head, (WL)w);
776	ev_stop ((W)w);	1886	ev_stop (EV_A_ (W)w);
777		1887
778	if (!signals [w->signum - 1].head)	1888	if (!signals [w->signum - 1].head)
779	signal (w->signum, SIG_DFL);	1889	signal (w->signum, SIG_DFL);
780	}	1890	}
781		1891
782	void evidle_start (struct ev_idle *w)	1892	void
		1893	ev_child_start (EV_P_ ev_child *w)
783	{	1894	{
		1895	#if EV_MULTIPLICITY
		1896	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1897	#endif
784	if (ev_is_active (w))	1898	if (expect_false (ev_is_active (w)))
785	return;	1899	return;
786		1900
787	ev_start ((W)w, ++idlecnt);	1901	ev_start (EV_A_ (W)w, 1);
788	array_needsize (idles, idlemax, idlecnt, );	1902	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
789	idles [idlecnt - 1] = w;
790	}	1903	}
791		1904
792	void evidle_stop (struct ev_idle *w)	1905	void
		1906	ev_child_stop (EV_P_ ev_child *w)
793	{	1907	{
794	ev_clear ((W)w);	1908	clear_pending (EV_A_ (W)w);
795	if (ev_is_active (w))	1909	if (expect_false (!ev_is_active (w)))
796	return;	1910	return;
797		1911
798	idles [w->active - 1] = idles [--idlecnt];	1912	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
799	ev_stop ((W)w);	1913	ev_stop (EV_A_ (W)w);
800	}	1914	}
801		1915
		1916	#if EV_STAT_ENABLE
		1917
		1918	# ifdef _WIN32
		1919	# undef lstat
		1920	# define lstat(a,b) _stati64 (a,b)
		1921	# endif
		1922
		1923	#define DEF_STAT_INTERVAL 5.0074891
		1924	#define MIN_STAT_INTERVAL 0.1074891
		1925
		1926	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1927
		1928	#if EV_USE_INOTIFY
		1929	# define EV_INOTIFY_BUFSIZE 8192
		1930
		1931	static void noinline
		1932	infy_add (EV_P_ ev_stat *w)
		1933	{
		1934	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
		1935
		1936	if (w->wd < 0)
		1937	{
		1938	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1939
		1940	/* monitor some parent directory for speedup hints */
		1941	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1942	{
		1943	char path [4096];
		1944	strcpy (path, w->path);
		1945
		1946	do
		1947	{
		1948	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1949	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1950
		1951	char *pend = strrchr (path, '/');
		1952
		1953	if (!pend)
		1954	break; /* whoops, no '/', complain to your admin */
		1955
		1956	*pend = 0;
		1957	w->wd = inotify_add_watch (fs_fd, path, mask);
		1958	}
		1959	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1960	}
		1961	}
		1962	else
		1963	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1964
		1965	if (w->wd >= 0)
		1966	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1967	}
		1968
		1969	static void noinline
		1970	infy_del (EV_P_ ev_stat *w)
		1971	{
		1972	int slot;
		1973	int wd = w->wd;
		1974
		1975	if (wd < 0)
		1976	return;
		1977
		1978	w->wd = -2;
		1979	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1980	wlist_del (&fs_hash [slot].head, (WL)w);
		1981
		1982	/* remove this watcher, if others are watching it, they will rearm */
		1983	inotify_rm_watch (fs_fd, wd);
		1984	}
		1985
		1986	static void noinline
		1987	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1988	{
		1989	if (slot < 0)
		1990	/* overflow, need to check for all hahs slots */
		1991	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1992	infy_wd (EV_A_ slot, wd, ev);
		1993	else
		1994	{
		1995	WL w_;
		1996
		1997	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1998	{
		1999	ev_stat *w = (ev_stat *)w_;
		2000	w_ = w_->next; /* lets us remove this watcher and all before it */
		2001
		2002	if (w->wd == wd || wd == -1)
		2003	{
		2004	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2005	{
		2006	w->wd = -1;
		2007	infy_add (EV_A_ w); /* re-add, no matter what */
		2008	}
		2009
		2010	stat_timer_cb (EV_A_ &w->timer, 0);
		2011	}
		2012	}
		2013	}
		2014	}
		2015
		2016	static void
		2017	infy_cb (EV_P_ ev_io *w, int revents)
		2018	{
		2019	char buf [EV_INOTIFY_BUFSIZE];
		2020	struct inotify_event *ev = (struct inotify_event *)buf;
		2021	int ofs;
		2022	int len = read (fs_fd, buf, sizeof (buf));
		2023
		2024	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2025	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2026	}
		2027
		2028	void inline_size
		2029	infy_init (EV_P)
		2030	{
		2031	if (fs_fd != -2)
		2032	return;
		2033
		2034	fs_fd = inotify_init ();
		2035
		2036	if (fs_fd >= 0)
		2037	{
		2038	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2039	ev_set_priority (&fs_w, EV_MAXPRI);
		2040	ev_io_start (EV_A_ &fs_w);
		2041	}
		2042	}
		2043
		2044	void inline_size
		2045	infy_fork (EV_P)
		2046	{
		2047	int slot;
		2048
		2049	if (fs_fd < 0)
		2050	return;
		2051
		2052	close (fs_fd);
		2053	fs_fd = inotify_init ();
		2054
		2055	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2056	{
		2057	WL w_ = fs_hash [slot].head;
		2058	fs_hash [slot].head = 0;
		2059
		2060	while (w_)
		2061	{
		2062	ev_stat *w = (ev_stat *)w_;
		2063	w_ = w_->next; /* lets us add this watcher */
		2064
		2065	w->wd = -1;
		2066
		2067	if (fs_fd >= 0)
		2068	infy_add (EV_A_ w); /* re-add, no matter what */
		2069	else
		2070	ev_timer_start (EV_A_ &w->timer);
		2071	}
		2072
		2073	}
		2074	}
		2075
		2076	#endif
		2077
		2078	void
		2079	ev_stat_stat (EV_P_ ev_stat *w)
		2080	{
		2081	if (lstat (w->path, &w->attr) < 0)
		2082	w->attr.st_nlink = 0;
		2083	else if (!w->attr.st_nlink)
		2084	w->attr.st_nlink = 1;
		2085	}
		2086
		2087	static void noinline
		2088	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2089	{
		2090	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2091
		2092	/* we copy this here each the time so that */
		2093	/* prev has the old value when the callback gets invoked */
		2094	w->prev = w->attr;
		2095	ev_stat_stat (EV_A_ w);
		2096
		2097	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2098	if (
		2099	w->prev.st_dev != w->attr.st_dev
		2100	|| w->prev.st_ino != w->attr.st_ino
		2101	|| w->prev.st_mode != w->attr.st_mode
		2102	|| w->prev.st_nlink != w->attr.st_nlink
		2103	|| w->prev.st_uid != w->attr.st_uid
		2104	|| w->prev.st_gid != w->attr.st_gid
		2105	|| w->prev.st_rdev != w->attr.st_rdev
		2106	|| w->prev.st_size != w->attr.st_size
		2107	|| w->prev.st_atime != w->attr.st_atime
		2108	|| w->prev.st_mtime != w->attr.st_mtime
		2109	|| w->prev.st_ctime != w->attr.st_ctime
		2110	) {
		2111	#if EV_USE_INOTIFY
		2112	infy_del (EV_A_ w);
		2113	infy_add (EV_A_ w);
		2114	ev_stat_stat (EV_A_ w); /* avoid race... */
		2115	#endif
		2116
		2117	ev_feed_event (EV_A_ w, EV_STAT);
		2118	}
		2119	}
		2120
		2121	void
		2122	ev_stat_start (EV_P_ ev_stat *w)
		2123	{
		2124	if (expect_false (ev_is_active (w)))
		2125	return;
		2126
		2127	/* since we use memcmp, we need to clear any padding data etc. */
		2128	memset (&w->prev, 0, sizeof (ev_statdata));
		2129	memset (&w->attr, 0, sizeof (ev_statdata));
		2130
		2131	ev_stat_stat (EV_A_ w);
		2132
		2133	if (w->interval < MIN_STAT_INTERVAL)
		2134	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2135
		2136	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2137	ev_set_priority (&w->timer, ev_priority (w));
		2138
		2139	#if EV_USE_INOTIFY
		2140	infy_init (EV_A);
		2141
		2142	if (fs_fd >= 0)
		2143	infy_add (EV_A_ w);
		2144	else
		2145	#endif
		2146	ev_timer_start (EV_A_ &w->timer);
		2147
		2148	ev_start (EV_A_ (W)w, 1);
		2149	}
		2150
		2151	void
		2152	ev_stat_stop (EV_P_ ev_stat *w)
		2153	{
		2154	clear_pending (EV_A_ (W)w);
		2155	if (expect_false (!ev_is_active (w)))
		2156	return;
		2157
		2158	#if EV_USE_INOTIFY
		2159	infy_del (EV_A_ w);
		2160	#endif
		2161	ev_timer_stop (EV_A_ &w->timer);
		2162
		2163	ev_stop (EV_A_ (W)w);
		2164	}
		2165	#endif
		2166
		2167	#if EV_IDLE_ENABLE
		2168	void
		2169	ev_idle_start (EV_P_ ev_idle *w)
		2170	{
		2171	if (expect_false (ev_is_active (w)))
		2172	return;
		2173
		2174	pri_adjust (EV_A_ (W)w);
		2175
		2176	{
		2177	int active = ++idlecnt [ABSPRI (w)];
		2178
		2179	++idleall;
		2180	ev_start (EV_A_ (W)w, active);
		2181
		2182	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2183	idles [ABSPRI (w)][active - 1] = w;
		2184	}
		2185	}
		2186
		2187	void
		2188	ev_idle_stop (EV_P_ ev_idle *w)
		2189	{
		2190	clear_pending (EV_A_ (W)w);
		2191	if (expect_false (!ev_is_active (w)))
		2192	return;
		2193
		2194	{
		2195	int active = ((W)w)->active;
		2196
		2197	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2198	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2199
		2200	ev_stop (EV_A_ (W)w);
		2201	--idleall;
		2202	}
		2203	}
		2204	#endif
		2205
		2206	void
		2207	ev_prepare_start (EV_P_ ev_prepare *w)
		2208	{
		2209	if (expect_false (ev_is_active (w)))
		2210	return;
		2211
		2212	ev_start (EV_A_ (W)w, ++preparecnt);
		2213	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2214	prepares [preparecnt - 1] = w;
		2215	}
		2216
		2217	void
		2218	ev_prepare_stop (EV_P_ ev_prepare *w)
		2219	{
		2220	clear_pending (EV_A_ (W)w);
		2221	if (expect_false (!ev_is_active (w)))
		2222	return;
		2223
		2224	{
		2225	int active = ((W)w)->active;
		2226	prepares [active - 1] = prepares [--preparecnt];
		2227	((W)prepares [active - 1])->active = active;
		2228	}
		2229
		2230	ev_stop (EV_A_ (W)w);
		2231	}
		2232
		2233	void
802	void evcheck_start (struct ev_check *w)	2234	ev_check_start (EV_P_ ev_check *w)
803	{	2235	{
804	if (ev_is_active (w))	2236	if (expect_false (ev_is_active (w)))
805	return;	2237	return;
806		2238
807	ev_start ((W)w, ++checkcnt);	2239	ev_start (EV_A_ (W)w, ++checkcnt);
808	array_needsize (checks, checkmax, checkcnt, );	2240	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
809	checks [checkcnt - 1] = w;	2241	checks [checkcnt - 1] = w;
810	}	2242	}
811		2243
		2244	void
812	void evcheck_stop (struct ev_check *w)	2245	ev_check_stop (EV_P_ ev_check *w)
813	{	2246	{
814	ev_clear ((W)w);	2247	clear_pending (EV_A_ (W)w);
815	if (ev_is_active (w))	2248	if (expect_false (!ev_is_active (w)))
816	return;	2249	return;
817		2250
		2251	{
		2252	int active = ((W)w)->active;
818	checks [w->active - 1] = checks [--checkcnt];	2253	checks [active - 1] = checks [--checkcnt];
		2254	((W)checks [active - 1])->active = active;
		2255	}
		2256
819	ev_stop ((W)w);	2257	ev_stop (EV_A_ (W)w);
820	}	2258	}
		2259
		2260	#if EV_EMBED_ENABLE
		2261	void noinline
		2262	ev_embed_sweep (EV_P_ ev_embed *w)
		2263	{
		2264	ev_loop (w->other, EVLOOP_NONBLOCK);
		2265	}
		2266
		2267	static void
		2268	embed_io_cb (EV_P_ ev_io *io, int revents)
		2269	{
		2270	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2271
		2272	if (ev_cb (w))
		2273	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2274	else
		2275	ev_loop (w->other, EVLOOP_NONBLOCK);
		2276	}
		2277
		2278	static void
		2279	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2280	{
		2281	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2282
		2283	{
		2284	struct ev_loop *loop = w->other;
		2285
		2286	while (fdchangecnt)
		2287	{
		2288	fd_reify (EV_A);
		2289	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2290	}
		2291	}
		2292	}
		2293
		2294	#if 0
		2295	static void
		2296	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2297	{
		2298	ev_idle_stop (EV_A_ idle);
		2299	}
		2300	#endif
		2301
		2302	void
		2303	ev_embed_start (EV_P_ ev_embed *w)
		2304	{
		2305	if (expect_false (ev_is_active (w)))
		2306	return;
		2307
		2308	{
		2309	struct ev_loop *loop = w->other;
		2310	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2311	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2312	}
		2313
		2314	ev_set_priority (&w->io, ev_priority (w));
		2315	ev_io_start (EV_A_ &w->io);
		2316
		2317	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2318	ev_set_priority (&w->prepare, EV_MINPRI);
		2319	ev_prepare_start (EV_A_ &w->prepare);
		2320
		2321	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2322
		2323	ev_start (EV_A_ (W)w, 1);
		2324	}
		2325
		2326	void
		2327	ev_embed_stop (EV_P_ ev_embed *w)
		2328	{
		2329	clear_pending (EV_A_ (W)w);
		2330	if (expect_false (!ev_is_active (w)))
		2331	return;
		2332
		2333	ev_io_stop (EV_A_ &w->io);
		2334	ev_prepare_stop (EV_A_ &w->prepare);
		2335
		2336	ev_stop (EV_A_ (W)w);
		2337	}
		2338	#endif
		2339
		2340	#if EV_FORK_ENABLE
		2341	void
		2342	ev_fork_start (EV_P_ ev_fork *w)
		2343	{
		2344	if (expect_false (ev_is_active (w)))
		2345	return;
		2346
		2347	ev_start (EV_A_ (W)w, ++forkcnt);
		2348	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2349	forks [forkcnt - 1] = w;
		2350	}
		2351
		2352	void
		2353	ev_fork_stop (EV_P_ ev_fork *w)
		2354	{
		2355	clear_pending (EV_A_ (W)w);
		2356	if (expect_false (!ev_is_active (w)))
		2357	return;
		2358
		2359	{
		2360	int active = ((W)w)->active;
		2361	forks [active - 1] = forks [--forkcnt];
		2362	((W)forks [active - 1])->active = active;
		2363	}
		2364
		2365	ev_stop (EV_A_ (W)w);
		2366	}
		2367	#endif
821		2368
822	/*****************************************************************************/	2369	/*****************************************************************************/
823		2370
824	struct ev_once	2371	struct ev_once
825	{	2372	{
826	struct ev_io io;	2373	ev_io io;
827	struct ev_timer to;	2374	ev_timer to;
828	void (*cb)(int revents, void *arg);	2375	void (*cb)(int revents, void *arg);
829	void *arg;	2376	void *arg;
830	};	2377	};
831		2378
832	static void	2379	static void
833	once_cb (struct ev_once *once, int revents)	2380	once_cb (EV_P_ struct ev_once *once, int revents)
834	{	2381	{
835	void (*cb)(int revents, void *arg) = once->cb;	2382	void (*cb)(int revents, void *arg) = once->cb;
836	void *arg = once->arg;	2383	void *arg = once->arg;
837		2384
838	evio_stop (&once->io);	2385	ev_io_stop (EV_A_ &once->io);
839	evtimer_stop (&once->to);	2386	ev_timer_stop (EV_A_ &once->to);
840	free (once);	2387	ev_free (once);
841		2388
842	cb (revents, arg);	2389	cb (revents, arg);
843	}	2390	}
844		2391
845	static void	2392	static void
846	once_cb_io (struct ev_io *w, int revents)	2393	once_cb_io (EV_P_ ev_io *w, int revents)
847	{	2394	{
848	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2395	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
849	}	2396	}
850		2397
851	static void	2398	static void
852	once_cb_to (struct ev_timer *w, int revents)	2399	once_cb_to (EV_P_ ev_timer *w, int revents)
853	{	2400	{
854	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2401	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
855	}	2402	}
856		2403
857	void	2404	void
858	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2405	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
859	{	2406	{
860	struct ev_once *once = malloc (sizeof (struct ev_once));	2407	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
861		2408
862	if (!once)	2409	if (expect_false (!once))
863	cb (EV_ERROR, arg);	2410	{
864	else	2411	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		2412	return;
865	{	2413	}
		2414
866	once->cb = cb;	2415	once->cb = cb;
867	once->arg = arg;	2416	once->arg = arg;
868		2417
869	evw_init (&once->io, once_cb_io);	2418	ev_init (&once->io, once_cb_io);
870
871	if (fd >= 0)	2419	if (fd >= 0)
872	{	2420	{
873	evio_set (&once->io, fd, events);	2421	ev_io_set (&once->io, fd, events);
874	evio_start (&once->io);	2422	ev_io_start (EV_A_ &once->io);
875	}	2423	}
876		2424
877	evw_init (&once->to, once_cb_to);	2425	ev_init (&once->to, once_cb_to);
878
879	if (timeout >= 0.)	2426	if (timeout >= 0.)
880	{	2427	{
881	evtimer_set (&once->to, timeout, 0.);	2428	ev_timer_set (&once->to, timeout, 0.);
882	evtimer_start (&once->to);	2429	ev_timer_start (EV_A_ &once->to);
883	}
884	}
885	}
886
887	/*****************************************************************************/
888
889	#if 0
890
891	struct ev_io wio;
892
893	static void
894	sin_cb (struct ev_io *w, int revents)
895	{
896	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
897	}
898
899	static void
900	ocb (struct ev_timer *w, int revents)
901	{
902	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
903	evtimer_stop (w);
904	evtimer_start (w);
905	}
906
907	static void
908	scb (struct ev_signal *w, int revents)
909	{
910	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
911	evio_stop (&wio);
912	evio_start (&wio);
913	}
914
915	static void
916	gcb (struct ev_signal *w, int revents)
917	{
918	fprintf (stderr, "generic %x\n", revents);
919
920	}
921
922	int main (void)
923	{
924	ev_init (0);
925
926	evio_init (&wio, sin_cb, 0, EV_READ);
927	evio_start (&wio);
928
929	struct ev_timer t[10000];
930
931	#if 0
932	int i;
933	for (i = 0; i < 10000; ++i)
934	{	2430	}
935	struct ev_timer *w = t + i;
936	evw_init (w, ocb, i);
937	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
938	evtimer_start (w);
939	if (drand48 () < 0.5)
940	evtimer_stop (w);
941	}
942	#endif
943
944	struct ev_timer t1;
945	evtimer_init (&t1, ocb, 5, 10);
946	evtimer_start (&t1);
947
948	struct ev_signal sig;
949	evsignal_init (&sig, scb, SIGQUIT);
950	evsignal_start (&sig);
951
952	struct ev_check cw;
953	evcheck_init (&cw, gcb);
954	evcheck_start (&cw);
955
956	struct ev_idle iw;
957	evidle_init (&iw, gcb);
958	evidle_start (&iw);
959
960	ev_loop (0);
961
962	return 0;
963	}	2431	}
964		2432
		2433	#if EV_MULTIPLICITY
		2434	#include "ev_wrap.h"
965	#endif	2435	#endif
966		2436
		2437	#ifdef __cplusplus
		2438	}
		2439	#endif
967		2440
968
969

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