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Comparing libev/ev.c (file contents):
Revision 1.11 by root, Wed Oct 31 07:40:49 2007 UTC vs.
Revision 1.170 by root, Sat Dec 8 22:11:14 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	# ifndef EV_USE_INOTIFY
		100	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		101	# define EV_USE_INOTIFY 1
		102	# else
		103	# define EV_USE_INOTIFY 0
		104	# endif
		105	# endif
		106
		107	#endif
		108
1	#include <math.h>	109	#include <math.h>
2	#include <stdlib.h>	110	#include <stdlib.h>
3	#include <unistd.h>
4	#include <fcntl.h>	111	#include <fcntl.h>
5	#include <signal.h>	112	#include <stddef.h>
6		113
7	#include <stdio.h>	114	#include <stdio.h>
8		115
9	#include <assert.h>	116	#include <assert.h>
10	#include <errno.h>	117	#include <errno.h>
11	#include <sys/time.h>	118	#include <sys/types.h>
12	#include <time.h>	119	#include <time.h>
13		120
14	#ifndef HAVE_MONOTONIC	121	#include <signal.h>
15	# ifdef CLOCK_MONOTONIC	122
16	# define HAVE_MONOTONIC 1	123	#ifdef EV_H
		124	# include EV_H
		125	#else
		126	# include "ev.h"
		127	#endif
		128
		129	#ifndef _WIN32
		130	# include <sys/time.h>
		131	# include <sys/wait.h>
		132	# include <unistd.h>
		133	#else
		134	# define WIN32_LEAN_AND_MEAN
		135	# include <windows.h>
		136	# ifndef EV_SELECT_IS_WINSOCKET
		137	# define EV_SELECT_IS_WINSOCKET 1
17	# endif	138	# endif
18	#endif	139	#endif
19		140
		141	/**/
		142
		143	#ifndef EV_USE_MONOTONIC
		144	# define EV_USE_MONOTONIC 0
		145	#endif
		146
		147	#ifndef EV_USE_REALTIME
		148	# define EV_USE_REALTIME 0
		149	#endif
		150
20	#ifndef HAVE_SELECT	151	#ifndef EV_USE_SELECT
21	# define HAVE_SELECT 1	152	# define EV_USE_SELECT 1
		153	#endif
		154
		155	#ifndef EV_USE_POLL
		156	# ifdef _WIN32
		157	# define EV_USE_POLL 0
		158	# else
		159	# define EV_USE_POLL 1
22	#endif	160	# endif
		161	#endif
23		162
24	#ifndef HAVE_EPOLL	163	#ifndef EV_USE_EPOLL
25	# define HAVE_EPOLL 0	164	# define EV_USE_EPOLL 0
		165	#endif
		166
		167	#ifndef EV_USE_KQUEUE
		168	# define EV_USE_KQUEUE 0
		169	#endif
		170
		171	#ifndef EV_USE_PORT
		172	# define EV_USE_PORT 0
		173	#endif
		174
		175	#ifndef EV_USE_INOTIFY
		176	# define EV_USE_INOTIFY 0
		177	#endif
		178
		179	#ifndef EV_PID_HASHSIZE
		180	# if EV_MINIMAL
		181	# define EV_PID_HASHSIZE 1
		182	# else
		183	# define EV_PID_HASHSIZE 16
26	#endif	184	# endif
		185	#endif
27		186
28	#ifndef HAVE_REALTIME	187	#ifndef EV_INOTIFY_HASHSIZE
29	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	188	# if EV_MINIMAL
		189	# define EV_INOTIFY_HASHSIZE 1
		190	# else
		191	# define EV_INOTIFY_HASHSIZE 16
30	#endif	192	# endif
		193	#endif
		194
		195	/**/
		196
		197	#ifndef CLOCK_MONOTONIC
		198	# undef EV_USE_MONOTONIC
		199	# define EV_USE_MONOTONIC 0
		200	#endif
		201
		202	#ifndef CLOCK_REALTIME
		203	# undef EV_USE_REALTIME
		204	# define EV_USE_REALTIME 0
		205	#endif
		206
		207	#if EV_SELECT_IS_WINSOCKET
		208	# include <winsock.h>
		209	#endif
		210
		211	#if !EV_STAT_ENABLE
		212	# define EV_USE_INOTIFY 0
		213	#endif
		214
		215	#if EV_USE_INOTIFY
		216	# include <sys/inotify.h>
		217	#endif
		218
		219	/**/
31		220
32	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	221	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
33	#define MAX_BLOCKTIME 60.	222	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		223	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
34		224
35	#include "ev.h"	225	#if __GNUC__ >= 3
		226	# define expect(expr,value) __builtin_expect ((expr),(value))
		227	# define noinline __attribute__ ((noinline))
		228	#else
		229	# define expect(expr,value) (expr)
		230	# define noinline
		231	# if __STDC_VERSION__ < 199901L
		232	# define inline
		233	# endif
		234	#endif
36		235
37	struct ev_watcher {	236	#define expect_false(expr) expect ((expr) != 0, 0)
38	EV_WATCHER (ev_watcher);	237	#define expect_true(expr) expect ((expr) != 0, 1)
39	};	238	#define inline_size static inline
40		239
41	struct ev_watcher_list {	240	#if EV_MINIMAL
42	EV_WATCHER_LIST (ev_watcher_list);	241	# define inline_speed static noinline
43	};	242	#else
		243	# define inline_speed static inline
		244	#endif
44		245
		246	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		247	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		248
		249	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		250	#define EMPTY2(a,b) /* used to suppress some warnings */
		251
45	typedef struct ev_watcher *W;	252	typedef ev_watcher *W;
46	typedef struct ev_watcher_list *WL;	253	typedef ev_watcher_list *WL;
		254	typedef ev_watcher_time *WT;
47		255
48	static ev_tstamp now, diff; /* monotonic clock */	256	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		257
		258	#ifdef _WIN32
		259	# include "ev_win32.c"
		260	#endif
		261
		262	/*****************************************************************************/
		263
		264	static void (*syserr_cb)(const char *msg);
		265
		266	void
		267	ev_set_syserr_cb (void (*cb)(const char *msg))
		268	{
		269	syserr_cb = cb;
		270	}
		271
		272	static void noinline
		273	syserr (const char *msg)
		274	{
		275	if (!msg)
		276	msg = "(libev) system error";
		277
		278	if (syserr_cb)
		279	syserr_cb (msg);
		280	else
		281	{
		282	perror (msg);
		283	abort ();
		284	}
		285	}
		286
		287	static void *(*alloc)(void *ptr, long size);
		288
		289	void
		290	ev_set_allocator (void *(*cb)(void *ptr, long size))
		291	{
		292	alloc = cb;
		293	}
		294
		295	inline_speed void *
		296	ev_realloc (void *ptr, long size)
		297	{
		298	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		299
		300	if (!ptr && size)
		301	{
		302	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		303	abort ();
		304	}
		305
		306	return ptr;
		307	}
		308
		309	#define ev_malloc(size) ev_realloc (0, (size))
		310	#define ev_free(ptr) ev_realloc ((ptr), 0)
		311
		312	/*****************************************************************************/
		313
		314	typedef struct
		315	{
		316	WL head;
		317	unsigned char events;
		318	unsigned char reify;
		319	#if EV_SELECT_IS_WINSOCKET
		320	SOCKET handle;
		321	#endif
		322	} ANFD;
		323
		324	typedef struct
		325	{
		326	W w;
		327	int events;
		328	} ANPENDING;
		329
		330	#if EV_USE_INOTIFY
		331	typedef struct
		332	{
		333	WL head;
		334	} ANFS;
		335	#endif
		336
		337	#if EV_MULTIPLICITY
		338
		339	struct ev_loop
		340	{
		341	ev_tstamp ev_rt_now;
		342	#define ev_rt_now ((loop)->ev_rt_now)
		343	#define VAR(name,decl) decl;
		344	#include "ev_vars.h"
		345	#undef VAR
		346	};
		347	#include "ev_wrap.h"
		348
		349	static struct ev_loop default_loop_struct;
		350	struct ev_loop *ev_default_loop_ptr;
		351
		352	#else
		353
49	ev_tstamp ev_now;	354	ev_tstamp ev_rt_now;
50	int ev_method;	355	#define VAR(name,decl) static decl;
		356	#include "ev_vars.h"
		357	#undef VAR
51		358
52	static int have_monotonic; /* runtime */	359	static int ev_default_loop_ptr;
53		360
54	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	361	#endif
55	static void (*method_modify)(int fd, int oev, int nev);
56	static void (*method_poll)(ev_tstamp timeout);
57		362
58	/*****************************************************************************/	363	/*****************************************************************************/
59		364
60	ev_tstamp	365	ev_tstamp
61	ev_time (void)	366	ev_time (void)
62	{	367	{
63	#if HAVE_REALTIME	368	#if EV_USE_REALTIME
64	struct timespec ts;	369	struct timespec ts;
65	clock_gettime (CLOCK_REALTIME, &ts);	370	clock_gettime (CLOCK_REALTIME, &ts);
66	return ts.tv_sec + ts.tv_nsec * 1e-9;	371	return ts.tv_sec + ts.tv_nsec * 1e-9;
67	#else	372	#else
68	struct timeval tv;	373	struct timeval tv;
69	gettimeofday (&tv, 0);	374	gettimeofday (&tv, 0);
70	return tv.tv_sec + tv.tv_usec * 1e-6;	375	return tv.tv_sec + tv.tv_usec * 1e-6;
71	#endif	376	#endif
72	}	377	}
73		378
74	static ev_tstamp	379	ev_tstamp inline_size
75	get_clock (void)	380	get_clock (void)
76	{	381	{
77	#if HAVE_MONOTONIC	382	#if EV_USE_MONOTONIC
78	if (have_monotonic)	383	if (expect_true (have_monotonic))
79	{	384	{
80	struct timespec ts;	385	struct timespec ts;
81	clock_gettime (CLOCK_MONOTONIC, &ts);	386	clock_gettime (CLOCK_MONOTONIC, &ts);
82	return ts.tv_sec + ts.tv_nsec * 1e-9;	387	return ts.tv_sec + ts.tv_nsec * 1e-9;
83	}	388	}
84	#endif	389	#endif
85		390
86	return ev_time ();	391	return ev_time ();
87	}	392	}
88		393
		394	#if EV_MULTIPLICITY
		395	ev_tstamp
		396	ev_now (EV_P)
		397	{
		398	return ev_rt_now;
		399	}
		400	#endif
		401
		402	int inline_size
		403	array_nextsize (int elem, int cur, int cnt)
		404	{
		405	int ncur = cur + 1;
		406
		407	do
		408	ncur <<= 1;
		409	while (cnt > ncur);
		410
		411	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		412	if (elem * ncur > 4096)
		413	{
		414	ncur *= elem;
		415	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		416	ncur = ncur - sizeof (void *) * 4;
		417	ncur /= elem;
		418	}
		419
		420	return ncur;
		421	}
		422
		423	inline_speed void *
		424	array_realloc (int elem, void *base, int *cur, int cnt)
		425	{
		426	*cur = array_nextsize (elem, *cur, cnt);
		427	return ev_realloc (base, elem * *cur);
		428	}
		429
89	#define array_needsize(base,cur,cnt,init) \	430	#define array_needsize(type,base,cur,cnt,init) \
90	if ((cnt) > cur) \	431	if (expect_false ((cnt) > (cur))) \
91	{ \	432	{ \
92	int newcnt = cur ? cur << 1 : 16; \	433	int ocur_ = (cur); \
93	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	434	(base) = (type *)array_realloc \
94	base = realloc (base, sizeof (*base) * (newcnt)); \	435	(sizeof (type), (base), &(cur), (cnt)); \
95	init (base + cur, newcnt - cur); \	436	init ((base) + (ocur_), (cur) - ocur_); \
96	cur = newcnt; \
97	}	437	}
		438
		439	#if 0
		440	#define array_slim(type,stem) \
		441	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		442	{ \
		443	stem ## max = array_roundsize (stem ## cnt >> 1); \
		444	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		445	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		446	}
		447	#endif
		448
		449	#define array_free(stem, idx) \
		450	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
98		451
99	/*****************************************************************************/	452	/*****************************************************************************/
100		453
		454	void noinline
		455	ev_feed_event (EV_P_ void *w, int revents)
		456	{
		457	W w_ = (W)w;
		458
		459	if (expect_false (w_->pending))
		460	{
		461	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		462	return;
		463	}
		464
		465	w_->pending = ++pendingcnt [ABSPRI (w_)];
		466	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		467	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		468	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		469	}
		470
		471	void inline_size
		472	queue_events (EV_P_ W *events, int eventcnt, int type)
		473	{
		474	int i;
		475
		476	for (i = 0; i < eventcnt; ++i)
		477	ev_feed_event (EV_A_ events [i], type);
		478	}
		479
		480	/*****************************************************************************/
		481
		482	void inline_size
		483	anfds_init (ANFD *base, int count)
		484	{
		485	while (count--)
		486	{
		487	base->head = 0;
		488	base->events = EV_NONE;
		489	base->reify = 0;
		490
		491	++base;
		492	}
		493	}
		494
		495	void inline_speed
		496	fd_event (EV_P_ int fd, int revents)
		497	{
		498	ANFD *anfd = anfds + fd;
		499	ev_io *w;
		500
		501	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		502	{
		503	int ev = w->events & revents;
		504
		505	if (ev)
		506	ev_feed_event (EV_A_ (W)w, ev);
		507	}
		508	}
		509
		510	void
		511	ev_feed_fd_event (EV_P_ int fd, int revents)
		512	{
		513	if (fd >= 0 && fd < anfdmax)
		514	fd_event (EV_A_ fd, revents);
		515	}
		516
		517	void inline_size
		518	fd_reify (EV_P)
		519	{
		520	int i;
		521
		522	for (i = 0; i < fdchangecnt; ++i)
		523	{
		524	int fd = fdchanges [i];
		525	ANFD *anfd = anfds + fd;
		526	ev_io *w;
		527
		528	int events = 0;
		529
		530	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		531	events |= w->events;
		532
		533	#if EV_SELECT_IS_WINSOCKET
		534	if (events)
		535	{
		536	unsigned long argp;
		537	anfd->handle = _get_osfhandle (fd);
		538	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		539	}
		540	#endif
		541
		542	anfd->reify = 0;
		543
		544	backend_modify (EV_A_ fd, anfd->events, events);
		545	anfd->events = events;
		546	}
		547
		548	fdchangecnt = 0;
		549	}
		550
		551	void inline_size
		552	fd_change (EV_P_ int fd)
		553	{
		554	if (expect_false (anfds [fd].reify))
		555	return;
		556
		557	anfds [fd].reify = 1;
		558
		559	++fdchangecnt;
		560	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		561	fdchanges [fdchangecnt - 1] = fd;
		562	}
		563
		564	void inline_speed
		565	fd_kill (EV_P_ int fd)
		566	{
		567	ev_io *w;
		568
		569	while ((w = (ev_io *)anfds [fd].head))
		570	{
		571	ev_io_stop (EV_A_ w);
		572	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		573	}
		574	}
		575
		576	int inline_size
		577	fd_valid (int fd)
		578	{
		579	#ifdef _WIN32
		580	return _get_osfhandle (fd) != -1;
		581	#else
		582	return fcntl (fd, F_GETFD) != -1;
		583	#endif
		584	}
		585
		586	/* called on EBADF to verify fds */
		587	static void noinline
		588	fd_ebadf (EV_P)
		589	{
		590	int fd;
		591
		592	for (fd = 0; fd < anfdmax; ++fd)
		593	if (anfds [fd].events)
		594	if (!fd_valid (fd) == -1 && errno == EBADF)
		595	fd_kill (EV_A_ fd);
		596	}
		597
		598	/* called on ENOMEM in select/poll to kill some fds and retry */
		599	static void noinline
		600	fd_enomem (EV_P)
		601	{
		602	int fd;
		603
		604	for (fd = anfdmax; fd--; )
		605	if (anfds [fd].events)
		606	{
		607	fd_kill (EV_A_ fd);
		608	return;
		609	}
		610	}
		611
		612	/* usually called after fork if backend needs to re-arm all fds from scratch */
		613	static void noinline
		614	fd_rearm_all (EV_P)
		615	{
		616	int fd;
		617
		618	for (fd = 0; fd < anfdmax; ++fd)
		619	if (anfds [fd].events)
		620	{
		621	anfds [fd].events = 0;
		622	fd_change (EV_A_ fd);
		623	}
		624	}
		625
		626	/*****************************************************************************/
		627
		628	void inline_speed
		629	upheap (WT *heap, int k)
		630	{
		631	WT w = heap [k];
		632
		633	while (k && heap [k >> 1]->at > w->at)
		634	{
		635	heap [k] = heap [k >> 1];
		636	((W)heap [k])->active = k + 1;
		637	k >>= 1;
		638	}
		639
		640	heap [k] = w;
		641	((W)heap [k])->active = k + 1;
		642
		643	}
		644
		645	void inline_speed
		646	downheap (WT *heap, int N, int k)
		647	{
		648	WT w = heap [k];
		649
		650	while (k < (N >> 1))
		651	{
		652	int j = k << 1;
		653
		654	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		655	++j;
		656
		657	if (w->at <= heap [j]->at)
		658	break;
		659
		660	heap [k] = heap [j];
		661	((W)heap [k])->active = k + 1;
		662	k = j;
		663	}
		664
		665	heap [k] = w;
		666	((W)heap [k])->active = k + 1;
		667	}
		668
		669	void inline_size
		670	adjustheap (WT *heap, int N, int k)
		671	{
		672	upheap (heap, k);
		673	downheap (heap, N, k);
		674	}
		675
		676	/*****************************************************************************/
		677
101	typedef struct	678	typedef struct
102	{	679	{
103	struct ev_io *head;	680	WL head;
104	unsigned char wev, rev; /* want, received event set */
105	} ANFD;
106
107	static ANFD *anfds;
108	static int anfdmax;
109
110	static int *fdchanges;
111	static int fdchangemax, fdchangecnt;
112
113	static void
114	anfds_init (ANFD *base, int count)
115	{
116	while (count--)
117	{
118	base->head = 0;
119	base->wev = base->rev = EV_NONE;
120	++base;
121	}
122	}
123
124	typedef struct
125	{
126	W w;
127	int events;
128	} ANPENDING;
129
130	static ANPENDING *pendings;
131	static int pendingmax, pendingcnt;
132
133	static void
134	event (W w, int events)
135	{
136	w->pending = ++pendingcnt;
137	array_needsize (pendings, pendingmax, pendingcnt, );
138	pendings [pendingcnt - 1].w = w;
139	pendings [pendingcnt - 1].events = events;
140	}
141
142	static void
143	fd_event (int fd, int events)
144	{
145	ANFD *anfd = anfds + fd;
146	struct ev_io *w;
147
148	for (w = anfd->head; w; w = w->next)
149	{
150	int ev = w->events & events;
151
152	if (ev)
153	event ((W)w, ev);
154	}
155	}
156
157	static void
158	queue_events (W *events, int eventcnt, int type)
159	{
160	int i;
161
162	for (i = 0; i < eventcnt; ++i)
163	event (events [i], type);
164	}
165
166	/*****************************************************************************/
167
168	static struct ev_timer **atimers;
169	static int atimermax, atimercnt;
170
171	static struct ev_timer **rtimers;
172	static int rtimermax, rtimercnt;
173
174	static void
175	upheap (struct ev_timer **timers, int k)
176	{
177	struct ev_timer *w = timers [k];
178
179	while (k && timers [k >> 1]->at > w->at)
180	{
181	timers [k] = timers [k >> 1];
182	timers [k]->active = k + 1;
183	k >>= 1;
184	}
185
186	timers [k] = w;
187	timers [k]->active = k + 1;
188
189	}
190
191	static void
192	downheap (struct ev_timer **timers, int N, int k)
193	{
194	struct ev_timer *w = timers [k];
195
196	while (k < (N >> 1))
197	{
198	int j = k << 1;
199
200	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
201	++j;
202
203	if (w->at <= timers [j]->at)
204	break;
205
206	timers [k] = timers [j];
207	timers [k]->active = k + 1;
208	k = j;
209	}
210
211	timers [k] = w;
212	timers [k]->active = k + 1;
213	}
214
215	/*****************************************************************************/
216
217	typedef struct
218	{
219	struct ev_signal *head;
220	sig_atomic_t gotsig;	681	sig_atomic_t volatile gotsig;
221	} ANSIG;	682	} ANSIG;
222		683
223	static ANSIG *signals;	684	static ANSIG *signals;
224	static int signalmax;	685	static int signalmax;
225		686
226	static int sigpipe [2];	687	static int sigpipe [2];
227	static sig_atomic_t gotsig;	688	static sig_atomic_t volatile gotsig;
228	static struct ev_io sigev;	689	static ev_io sigev;
229		690
230	static void	691	void inline_size
231	signals_init (ANSIG *base, int count)	692	signals_init (ANSIG *base, int count)
232	{	693	{
233	while (count--)	694	while (count--)
234	{	695	{
235	base->head = 0;	696	base->head = 0;
236	base->gotsig = 0;	697	base->gotsig = 0;
		698
237	++base;	699	++base;
238	}	700	}
239	}	701	}
240		702
241	static void	703	static void
242	sighandler (int signum)	704	sighandler (int signum)
243	{	705	{
		706	#if _WIN32
		707	signal (signum, sighandler);
		708	#endif
		709
244	signals [signum - 1].gotsig = 1;	710	signals [signum - 1].gotsig = 1;
245		711
246	if (!gotsig)	712	if (!gotsig)
247	{	713	{
		714	int old_errno = errno;
248	gotsig = 1;	715	gotsig = 1;
249	write (sigpipe [1], &gotsig, 1);	716	write (sigpipe [1], &signum, 1);
		717	errno = old_errno;
250	}	718	}
		719	}
		720
		721	void noinline
		722	ev_feed_signal_event (EV_P_ int signum)
		723	{
		724	WL w;
		725
		726	#if EV_MULTIPLICITY
		727	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		728	#endif
		729
		730	--signum;
		731
		732	if (signum < 0 || signum >= signalmax)
		733	return;
		734
		735	signals [signum].gotsig = 0;
		736
		737	for (w = signals [signum].head; w; w = w->next)
		738	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
251	}	739	}
252		740
253	static void	741	static void
254	sigcb (struct ev_io *iow, int revents)	742	sigcb (EV_P_ ev_io *iow, int revents)
255	{	743	{
256	struct ev_signal *w;
257	int sig;	744	int signum;
258		745
		746	read (sigpipe [0], &revents, 1);
259	gotsig = 0;	747	gotsig = 0;
260	read (sigpipe [0], &revents, 1);
261		748
262	for (sig = signalmax; sig--; )	749	for (signum = signalmax; signum--; )
263	if (signals [sig].gotsig)	750	if (signals [signum].gotsig)
		751	ev_feed_signal_event (EV_A_ signum + 1);
		752	}
		753
		754	void inline_size
		755	fd_intern (int fd)
		756	{
		757	#ifdef _WIN32
		758	int arg = 1;
		759	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		760	#else
		761	fcntl (fd, F_SETFD, FD_CLOEXEC);
		762	fcntl (fd, F_SETFL, O_NONBLOCK);
		763	#endif
		764	}
		765
		766	static void noinline
		767	siginit (EV_P)
		768	{
		769	fd_intern (sigpipe [0]);
		770	fd_intern (sigpipe [1]);
		771
		772	ev_io_set (&sigev, sigpipe [0], EV_READ);
		773	ev_io_start (EV_A_ &sigev);
		774	ev_unref (EV_A); /* child watcher should not keep loop alive */
		775	}
		776
		777	/*****************************************************************************/
		778
		779	static ev_child *childs [EV_PID_HASHSIZE];
		780
		781	#ifndef _WIN32
		782
		783	static ev_signal childev;
		784
		785	void inline_speed
		786	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		787	{
		788	ev_child *w;
		789
		790	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		791	if (w->pid == pid || !w->pid)
264	{	792	{
265	signals [sig].gotsig = 0;	793	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
266		794	w->rpid = pid;
267	for (w = signals [sig].head; w; w = w->next)	795	w->rstatus = status;
268	event ((W)w, EV_SIGNAL);	796	ev_feed_event (EV_A_ (W)w, EV_CHILD);
269	}	797	}
270	}	798	}
271		799
		800	#ifndef WCONTINUED
		801	# define WCONTINUED 0
		802	#endif
		803
272	static void	804	static void
273	siginit (void)	805	childcb (EV_P_ ev_signal *sw, int revents)
274	{	806	{
275	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	807	int pid, status;
276	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
277		808
278	/* rather than sort out wether we really need nb, set it */	809	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
279	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	810	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
280	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	811	if (!WCONTINUED
		812	|| errno != EINVAL
		813	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		814	return;
281		815
282	evio_set (&sigev, sigpipe [0], EV_READ);	816	/* make sure we are called again until all childs have been reaped */
283	evio_start (&sigev);	817	/* we need to do it this way so that the callback gets called before we continue */
		818	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		819
		820	child_reap (EV_A_ sw, pid, pid, status);
		821	if (EV_PID_HASHSIZE > 1)
		822	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
284	}	823	}
		824
		825	#endif
285		826
286	/*****************************************************************************/	827	/*****************************************************************************/
287		828
288	static struct ev_idle **idles;	829	#if EV_USE_PORT
289	static int idlemax, idlecnt;	830	# include "ev_port.c"
		831	#endif
		832	#if EV_USE_KQUEUE
		833	# include "ev_kqueue.c"
		834	#endif
		835	#if EV_USE_EPOLL
		836	# include "ev_epoll.c"
		837	#endif
		838	#if EV_USE_POLL
		839	# include "ev_poll.c"
		840	#endif
		841	#if EV_USE_SELECT
		842	# include "ev_select.c"
		843	#endif
290		844
291	static struct ev_check **checks;	845	int
292	static int checkmax, checkcnt;	846	ev_version_major (void)
		847	{
		848	return EV_VERSION_MAJOR;
		849	}
		850
		851	int
		852	ev_version_minor (void)
		853	{
		854	return EV_VERSION_MINOR;
		855	}
		856
		857	/* return true if we are running with elevated privileges and should ignore env variables */
		858	int inline_size
		859	enable_secure (void)
		860	{
		861	#ifdef _WIN32
		862	return 0;
		863	#else
		864	return getuid () != geteuid ()
		865	|| getgid () != getegid ();
		866	#endif
		867	}
		868
		869	unsigned int
		870	ev_supported_backends (void)
		871	{
		872	unsigned int flags = 0;
		873
		874	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		875	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		876	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		877	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		878	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		879
		880	return flags;
		881	}
		882
		883	unsigned int
		884	ev_recommended_backends (void)
		885	{
		886	unsigned int flags = ev_supported_backends ();
		887
		888	#ifndef __NetBSD__
		889	/* kqueue is borked on everything but netbsd apparently */
		890	/* it usually doesn't work correctly on anything but sockets and pipes */
		891	flags &= ~EVBACKEND_KQUEUE;
		892	#endif
		893	#ifdef __APPLE__
		894	// flags &= ~EVBACKEND_KQUEUE; for documentation
		895	flags &= ~EVBACKEND_POLL;
		896	#endif
		897
		898	return flags;
		899	}
		900
		901	unsigned int
		902	ev_embeddable_backends (void)
		903	{
		904	return EVBACKEND_EPOLL
		905	| EVBACKEND_KQUEUE
		906	| EVBACKEND_PORT;
		907	}
		908
		909	unsigned int
		910	ev_backend (EV_P)
		911	{
		912	return backend;
		913	}
		914
		915	unsigned int
		916	ev_loop_count (EV_P)
		917	{
		918	return loop_count;
		919	}
		920
		921	static void noinline
		922	loop_init (EV_P_ unsigned int flags)
		923	{
		924	if (!backend)
		925	{
		926	#if EV_USE_MONOTONIC
		927	{
		928	struct timespec ts;
		929	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		930	have_monotonic = 1;
		931	}
		932	#endif
		933
		934	ev_rt_now = ev_time ();
		935	mn_now = get_clock ();
		936	now_floor = mn_now;
		937	rtmn_diff = ev_rt_now - mn_now;
		938
		939	/* pid check not overridable via env */
		940	#ifndef _WIN32
		941	if (flags & EVFLAG_FORKCHECK)
		942	curpid = getpid ();
		943	#endif
		944
		945	if (!(flags & EVFLAG_NOENV)
		946	&& !enable_secure ()
		947	&& getenv ("LIBEV_FLAGS"))
		948	flags = atoi (getenv ("LIBEV_FLAGS"));
		949
		950	if (!(flags & 0x0000ffffUL))
		951	flags |= ev_recommended_backends ();
		952
		953	backend = 0;
		954	backend_fd = -1;
		955	#if EV_USE_INOTIFY
		956	fs_fd = -2;
		957	#endif
		958
		959	#if EV_USE_PORT
		960	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		961	#endif
		962	#if EV_USE_KQUEUE
		963	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		964	#endif
		965	#if EV_USE_EPOLL
		966	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		967	#endif
		968	#if EV_USE_POLL
		969	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		970	#endif
		971	#if EV_USE_SELECT
		972	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		973	#endif
		974
		975	ev_init (&sigev, sigcb);
		976	ev_set_priority (&sigev, EV_MAXPRI);
		977	}
		978	}
		979
		980	static void noinline
		981	loop_destroy (EV_P)
		982	{
		983	int i;
		984
		985	#if EV_USE_INOTIFY
		986	if (fs_fd >= 0)
		987	close (fs_fd);
		988	#endif
		989
		990	if (backend_fd >= 0)
		991	close (backend_fd);
		992
		993	#if EV_USE_PORT
		994	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		995	#endif
		996	#if EV_USE_KQUEUE
		997	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		998	#endif
		999	#if EV_USE_EPOLL
		1000	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1001	#endif
		1002	#if EV_USE_POLL
		1003	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1004	#endif
		1005	#if EV_USE_SELECT
		1006	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1007	#endif
		1008
		1009	for (i = NUMPRI; i--; )
		1010	{
		1011	array_free (pending, [i]);
		1012	#if EV_IDLE_ENABLE
		1013	array_free (idle, [i]);
		1014	#endif
		1015	}
		1016
		1017	/* have to use the microsoft-never-gets-it-right macro */
		1018	array_free (fdchange, EMPTY);
		1019	array_free (timer, EMPTY);
		1020	#if EV_PERIODIC_ENABLE
		1021	array_free (periodic, EMPTY);
		1022	#endif
		1023	array_free (prepare, EMPTY);
		1024	array_free (check, EMPTY);
		1025
		1026	backend = 0;
		1027	}
		1028
		1029	void inline_size infy_fork (EV_P);
		1030
		1031	void inline_size
		1032	loop_fork (EV_P)
		1033	{
		1034	#if EV_USE_PORT
		1035	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1036	#endif
		1037	#if EV_USE_KQUEUE
		1038	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1039	#endif
		1040	#if EV_USE_EPOLL
		1041	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1042	#endif
		1043	#if EV_USE_INOTIFY
		1044	infy_fork (EV_A);
		1045	#endif
		1046
		1047	if (ev_is_active (&sigev))
		1048	{
		1049	/* default loop */
		1050
		1051	ev_ref (EV_A);
		1052	ev_io_stop (EV_A_ &sigev);
		1053	close (sigpipe [0]);
		1054	close (sigpipe [1]);
		1055
		1056	while (pipe (sigpipe))
		1057	syserr ("(libev) error creating pipe");
		1058
		1059	siginit (EV_A);
		1060	}
		1061
		1062	postfork = 0;
		1063	}
		1064
		1065	#if EV_MULTIPLICITY
		1066	struct ev_loop *
		1067	ev_loop_new (unsigned int flags)
		1068	{
		1069	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1070
		1071	memset (loop, 0, sizeof (struct ev_loop));
		1072
		1073	loop_init (EV_A_ flags);
		1074
		1075	if (ev_backend (EV_A))
		1076	return loop;
		1077
		1078	return 0;
		1079	}
		1080
		1081	void
		1082	ev_loop_destroy (EV_P)
		1083	{
		1084	loop_destroy (EV_A);
		1085	ev_free (loop);
		1086	}
		1087
		1088	void
		1089	ev_loop_fork (EV_P)
		1090	{
		1091	postfork = 1;
		1092	}
		1093
		1094	#endif
		1095
		1096	#if EV_MULTIPLICITY
		1097	struct ev_loop *
		1098	ev_default_loop_init (unsigned int flags)
		1099	#else
		1100	int
		1101	ev_default_loop (unsigned int flags)
		1102	#endif
		1103	{
		1104	if (sigpipe [0] == sigpipe [1])
		1105	if (pipe (sigpipe))
		1106	return 0;
		1107
		1108	if (!ev_default_loop_ptr)
		1109	{
		1110	#if EV_MULTIPLICITY
		1111	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1112	#else
		1113	ev_default_loop_ptr = 1;
		1114	#endif
		1115
		1116	loop_init (EV_A_ flags);
		1117
		1118	if (ev_backend (EV_A))
		1119	{
		1120	siginit (EV_A);
		1121
		1122	#ifndef _WIN32
		1123	ev_signal_init (&childev, childcb, SIGCHLD);
		1124	ev_set_priority (&childev, EV_MAXPRI);
		1125	ev_signal_start (EV_A_ &childev);
		1126	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1127	#endif
		1128	}
		1129	else
		1130	ev_default_loop_ptr = 0;
		1131	}
		1132
		1133	return ev_default_loop_ptr;
		1134	}
		1135
		1136	void
		1137	ev_default_destroy (void)
		1138	{
		1139	#if EV_MULTIPLICITY
		1140	struct ev_loop *loop = ev_default_loop_ptr;
		1141	#endif
		1142
		1143	#ifndef _WIN32
		1144	ev_ref (EV_A); /* child watcher */
		1145	ev_signal_stop (EV_A_ &childev);
		1146	#endif
		1147
		1148	ev_ref (EV_A); /* signal watcher */
		1149	ev_io_stop (EV_A_ &sigev);
		1150
		1151	close (sigpipe [0]); sigpipe [0] = 0;
		1152	close (sigpipe [1]); sigpipe [1] = 0;
		1153
		1154	loop_destroy (EV_A);
		1155	}
		1156
		1157	void
		1158	ev_default_fork (void)
		1159	{
		1160	#if EV_MULTIPLICITY
		1161	struct ev_loop *loop = ev_default_loop_ptr;
		1162	#endif
		1163
		1164	if (backend)
		1165	postfork = 1;
		1166	}
293		1167
294	/*****************************************************************************/	1168	/*****************************************************************************/
295		1169
296	#if HAVE_EPOLL	1170	void
297	# include "ev_epoll.c"	1171	ev_invoke (EV_P_ void *w, int revents)
298	#endif
299	#if HAVE_SELECT
300	# include "ev_select.c"
301	#endif
302
303	int ev_init (int flags)
304	{	1172	{
305	#if HAVE_MONOTONIC	1173	EV_CB_INVOKE ((W)w, revents);
306	{
307	struct timespec ts;
308	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
309	have_monotonic = 1;
310	}
311	#endif
312
313	ev_now = ev_time ();
314	now = get_clock ();
315	diff = ev_now - now;
316
317	if (pipe (sigpipe))
318	return 0;
319
320	ev_method = EVMETHOD_NONE;
321	#if HAVE_EPOLL
322	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
323	#endif
324	#if HAVE_SELECT
325	if (ev_method == EVMETHOD_NONE) select_init (flags);
326	#endif
327
328	if (ev_method)
329	{
330	evw_init (&sigev, sigcb, 0);
331	siginit ();
332	}
333
334	return ev_method;
335	}	1174	}
336		1175
337	/*****************************************************************************/	1176	void inline_speed
338		1177	call_pending (EV_P)
339	void ev_prefork (void)
340	{	1178	{
341	/* nop */
342	}
343
344	void ev_postfork_parent (void)
345	{
346	/* nop */
347	}
348
349	void ev_postfork_child (void)
350	{
351	#if HAVE_EPOLL
352	if (ev_method == EVMETHOD_EPOLL)
353	epoll_postfork_child ();
354	#endif
355
356	evio_stop (&sigev);
357	close (sigpipe [0]);
358	close (sigpipe [1]);
359	pipe (sigpipe);
360	siginit ();
361	}
362
363	/*****************************************************************************/
364
365	static void
366	fd_reify (void)
367	{
368	int i;	1179	int pri;
369		1180
370	for (i = 0; i < fdchangecnt; ++i)	1181	for (pri = NUMPRI; pri--; )
		1182	while (pendingcnt [pri])
371	{	1183	{
372	int fd = fdchanges [i];	1184	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
373	ANFD *anfd = anfds + fd;
374	struct ev_io *w;
375		1185
376	int wev = 0;	1186	if (expect_true (p->w))
377
378	for (w = anfd->head; w; w = w->next)
379	wev |= w->events;
380
381	if (anfd->wev != wev)
382	{	1187	{
383	method_modify (fd, anfd->wev, wev);	1188	/*assert (("non-pending watcher on pending list", p->w->pending));*/
384	anfd->wev = wev;
385	}
386	}
387		1189
388	fdchangecnt = 0;
389	}
390
391	static void
392	call_pending ()
393	{
394	int i;
395
396	for (i = 0; i < pendingcnt; ++i)
397	{
398	ANPENDING *p = pendings + i;
399
400	if (p->w)
401	{
402	p->w->pending = 0;	1190	p->w->pending = 0;
403	p->w->cb (p->w, p->events);	1191	EV_CB_INVOKE (p->w, p->events);
404	}	1192	}
405	}	1193	}
406
407	pendingcnt = 0;
408	}	1194	}
409		1195
410	static void	1196	void inline_size
411	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	1197	timers_reify (EV_P)
412	{	1198	{
413	while (timercnt && timers [0]->at <= now)	1199	while (timercnt && ((WT)timers [0])->at <= mn_now)
414	{	1200	{
415	struct ev_timer *w = timers [0];	1201	ev_timer *w = timers [0];
		1202
		1203	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
416		1204
417	/* first reschedule or stop timer */	1205	/* first reschedule or stop timer */
418	if (w->repeat)	1206	if (w->repeat)
419	{	1207	{
420	if (w->is_abs)	1208	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
421	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;	1209
422	else
423	w->at = now + w->repeat;	1210	((WT)w)->at += w->repeat;
		1211	if (((WT)w)->at < mn_now)
		1212	((WT)w)->at = mn_now;
424		1213
425	assert (w->at > now);
426
427	downheap (timers, timercnt, 0);	1214	downheap ((WT *)timers, timercnt, 0);
428	}	1215	}
429	else	1216	else
		1217	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1218
		1219	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1220	}
		1221	}
		1222
		1223	#if EV_PERIODIC_ENABLE
		1224	void inline_size
		1225	periodics_reify (EV_P)
		1226	{
		1227	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
		1228	{
		1229	ev_periodic *w = periodics [0];
		1230
		1231	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
		1232
		1233	/* first reschedule or stop timer */
		1234	if (w->reschedule_cb)
430	{	1235	{
431	evtimer_stop (w); /* nonrepeating: stop timer */	1236	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
432	--timercnt; /* maybe pass by reference instead? */	1237	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1238	downheap ((WT *)periodics, periodiccnt, 0);
433	}	1239	}
		1240	else if (w->interval)
		1241	{
		1242	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
		1243	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1244	downheap ((WT *)periodics, periodiccnt, 0);
		1245	}
		1246	else
		1247	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
434		1248
435	event ((W)w, EV_TIMEOUT);	1249	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
436	}	1250	}
437	}	1251	}
438		1252
439	static void	1253	static void noinline
440	time_update ()	1254	periodics_reschedule (EV_P)
441	{	1255	{
442	int i;	1256	int i;
443	ev_now = ev_time ();
444		1257
445	if (have_monotonic)	1258	/* adjust periodics after time jump */
		1259	for (i = 0; i < periodiccnt; ++i)
		1260	{
		1261	ev_periodic *w = periodics [i];
		1262
		1263	if (w->reschedule_cb)
		1264	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1265	else if (w->interval)
		1266	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
446	{	1267	}
447	ev_tstamp odiff = diff;
448		1268
449	/* detecting time jumps is much more difficult */	1269	/* now rebuild the heap */
450	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1270	for (i = periodiccnt >> 1; i--; )
		1271	downheap ((WT *)periodics, periodiccnt, i);
		1272	}
		1273	#endif
		1274
		1275	#if EV_IDLE_ENABLE
		1276	void inline_size
		1277	idle_reify (EV_P)
		1278	{
		1279	if (expect_false (idleall))
		1280	{
		1281	int pri;
		1282
		1283	for (pri = NUMPRI; pri--; )
451	{	1284	{
452	now = get_clock ();	1285	if (pendingcnt [pri])
453	diff = ev_now - now;	1286	break;
454		1287
455	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1288	if (idlecnt [pri])
456	return; /* all is well */	1289	{
457		1290	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
458	ev_now = ev_time ();	1291	break;
		1292	}
459	}	1293	}
		1294	}
		1295	}
		1296	#endif
460		1297
461	/* time jump detected, reschedule atimers */	1298	int inline_size
462	for (i = 0; i < atimercnt; ++i)	1299	time_update_monotonic (EV_P)
		1300	{
		1301	mn_now = get_clock ();
		1302
		1303	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1304	{
		1305	ev_rt_now = rtmn_diff + mn_now;
		1306	return 0;
		1307	}
		1308	else
		1309	{
		1310	now_floor = mn_now;
		1311	ev_rt_now = ev_time ();
		1312	return 1;
		1313	}
		1314	}
		1315
		1316	void inline_size
		1317	time_update (EV_P)
		1318	{
		1319	int i;
		1320
		1321	#if EV_USE_MONOTONIC
		1322	if (expect_true (have_monotonic))
		1323	{
		1324	if (time_update_monotonic (EV_A))
463	{	1325	{
464	struct ev_timer *w = atimers [i];	1326	ev_tstamp odiff = rtmn_diff;
465	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1327
		1328	/* loop a few times, before making important decisions.
		1329	* on the choice of "4": one iteration isn't enough,
		1330	* in case we get preempted during the calls to
		1331	* ev_time and get_clock. a second call is almost guaranteed
		1332	* to succeed in that case, though. and looping a few more times
		1333	* doesn't hurt either as we only do this on time-jumps or
		1334	* in the unlikely event of having been preempted here.
		1335	*/
		1336	for (i = 4; --i; )
		1337	{
		1338	rtmn_diff = ev_rt_now - mn_now;
		1339
		1340	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1341	return; /* all is well */
		1342
		1343	ev_rt_now = ev_time ();
		1344	mn_now = get_clock ();
		1345	now_floor = mn_now;
		1346	}
		1347
		1348	# if EV_PERIODIC_ENABLE
		1349	periodics_reschedule (EV_A);
		1350	# endif
		1351	/* no timer adjustment, as the monotonic clock doesn't jump */
		1352	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
466	}	1353	}
467	}	1354	}
468	else	1355	else
		1356	#endif
469	{	1357	{
470	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1358	ev_rt_now = ev_time ();
471	/* time jump detected, adjust rtimers */	1359
		1360	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		1361	{
		1362	#if EV_PERIODIC_ENABLE
		1363	periodics_reschedule (EV_A);
		1364	#endif
		1365
		1366	/* adjust timers. this is easy, as the offset is the same for all of them */
472	for (i = 0; i < rtimercnt; ++i)	1367	for (i = 0; i < timercnt; ++i)
473	rtimers [i]->at += ev_now - now;	1368	((WT)timers [i])->at += ev_rt_now - mn_now;
		1369	}
474		1370
475	now = ev_now;	1371	mn_now = ev_rt_now;
476	}
477	}
478
479	int ev_loop_done;
480
481	void ev_loop (int flags)
482	{
483	double block;
484	ev_loop_done = flags & EVLOOP_ONESHOT;
485
486	if (checkcnt)
487	{	1372	}
488	queue_events ((W *)checks, checkcnt, EV_CHECK);	1373	}
489	call_pending ();	1374
490	}	1375	void
		1376	ev_ref (EV_P)
		1377	{
		1378	++activecnt;
		1379	}
		1380
		1381	void
		1382	ev_unref (EV_P)
		1383	{
		1384	--activecnt;
		1385	}
		1386
		1387	static int loop_done;
		1388
		1389	void
		1390	ev_loop (EV_P_ int flags)
		1391	{
		1392	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1393	? EVUNLOOP_ONE
		1394	: EVUNLOOP_CANCEL;
		1395
		1396	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
491		1397
492	do	1398	do
493	{	1399	{
		1400	#ifndef _WIN32
		1401	if (expect_false (curpid)) /* penalise the forking check even more */
		1402	if (expect_false (getpid () != curpid))
		1403	{
		1404	curpid = getpid ();
		1405	postfork = 1;
		1406	}
		1407	#endif
		1408
		1409	#if EV_FORK_ENABLE
		1410	/* we might have forked, so queue fork handlers */
		1411	if (expect_false (postfork))
		1412	if (forkcnt)
		1413	{
		1414	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1415	call_pending (EV_A);
		1416	}
		1417	#endif
		1418
		1419	/* queue prepare watchers (and execute them) */
		1420	if (expect_false (preparecnt))
		1421	{
		1422	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1423	call_pending (EV_A);
		1424	}
		1425
		1426	if (expect_false (!activecnt))
		1427	break;
		1428
		1429	/* we might have forked, so reify kernel state if necessary */
		1430	if (expect_false (postfork))
		1431	loop_fork (EV_A);
		1432
494	/* update fd-related kernel structures */	1433	/* update fd-related kernel structures */
495	fd_reify ();	1434	fd_reify (EV_A);
496		1435
497	/* calculate blocking time */	1436	/* calculate blocking time */
498	if (flags & EVLOOP_NONBLOCK || idlecnt)	1437	{
499	block = 0.;	1438	ev_tstamp block;
		1439
		1440	if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))
		1441	block = 0.; /* do not block at all */
500	else	1442	else
501	{	1443	{
		1444	/* update time to cancel out callback processing overhead */
		1445	#if EV_USE_MONOTONIC
		1446	if (expect_true (have_monotonic))
		1447	time_update_monotonic (EV_A);
		1448	else
		1449	#endif
		1450	{
		1451	ev_rt_now = ev_time ();
		1452	mn_now = ev_rt_now;
		1453	}
		1454
502	block = MAX_BLOCKTIME;	1455	block = MAX_BLOCKTIME;
503		1456
504	if (rtimercnt)	1457	if (timercnt)
505	{	1458	{
506	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1459	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
507	if (block > to) block = to;	1460	if (block > to) block = to;
508	}	1461	}
509		1462
		1463	#if EV_PERIODIC_ENABLE
510	if (atimercnt)	1464	if (periodiccnt)
511	{	1465	{
512	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1466	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
513	if (block > to) block = to;	1467	if (block > to) block = to;
514	}	1468	}
		1469	#endif
515		1470
516	if (block < 0.) block = 0.;	1471	if (expect_false (block < 0.)) block = 0.;
517	}	1472	}
518		1473
519	method_poll (block);	1474	++loop_count;
		1475	backend_poll (EV_A_ block);
		1476	}
520		1477
521	/* update ev_now, do magic */	1478	/* update ev_rt_now, do magic */
522	time_update ();	1479	time_update (EV_A);
523		1480
524	/* queue pending timers and reschedule them */	1481	/* queue pending timers and reschedule them */
525	/* absolute timers first */	1482	timers_reify (EV_A); /* relative timers called last */
526	timers_reify (atimers, atimercnt, ev_now);	1483	#if EV_PERIODIC_ENABLE
527	/* relative timers second */	1484	periodics_reify (EV_A); /* absolute timers called first */
528	timers_reify (rtimers, rtimercnt, now);	1485	#endif
529		1486
		1487	#if EV_IDLE_ENABLE
530	/* queue idle watchers unless io or timers are pending */	1488	/* queue idle watchers unless other events are pending */
531	if (!pendingcnt)	1489	idle_reify (EV_A);
532	queue_events ((W *)idles, idlecnt, EV_IDLE);	1490	#endif
533		1491
534	/* queue check and possibly idle watchers */	1492	/* queue check watchers, to be executed first */
		1493	if (expect_false (checkcnt))
535	queue_events ((W *)checks, checkcnt, EV_CHECK);	1494	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
536		1495
537	call_pending ();	1496	call_pending (EV_A);
		1497
538	}	1498	}
539	while (!ev_loop_done);	1499	while (expect_true (activecnt && !loop_done));
		1500
		1501	if (loop_done == EVUNLOOP_ONE)
		1502	loop_done = EVUNLOOP_CANCEL;
		1503	}
		1504
		1505	void
		1506	ev_unloop (EV_P_ int how)
		1507	{
		1508	loop_done = how;
540	}	1509	}
541		1510
542	/*****************************************************************************/	1511	/*****************************************************************************/
543		1512
544	static void	1513	void inline_size
545	wlist_add (WL *head, WL elem)	1514	wlist_add (WL *head, WL elem)
546	{	1515	{
547	elem->next = *head;	1516	elem->next = *head;
548	*head = elem;	1517	*head = elem;
549	}	1518	}
550		1519
551	static void	1520	void inline_size
552	wlist_del (WL *head, WL elem)	1521	wlist_del (WL *head, WL elem)
553	{	1522	{
554	while (*head)	1523	while (*head)
555	{	1524	{
556	if (*head == elem)	1525	if (*head == elem)
…		…
561		1530
562	head = &(*head)->next;	1531	head = &(*head)->next;
563	}	1532	}
564	}	1533	}
565		1534
566	static void	1535	void inline_speed
567	ev_start (W w, int active)	1536	clear_pending (EV_P_ W w)
568	{	1537	{
		1538	if (w->pending)
		1539	{
		1540	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1541	w->pending = 0;
		1542	}
		1543	}
		1544
		1545	int
		1546	ev_clear_pending (EV_P_ void *w)
		1547	{
		1548	W w_ = (W)w;
		1549	int pending = w_->pending;
		1550
		1551	if (!pending)
		1552	return 0;
		1553
569	w->pending = 0;	1554	w_->pending = 0;
		1555	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1556	p->w = 0;
		1557
		1558	return p->events;
		1559	}
		1560
		1561	void inline_size
		1562	pri_adjust (EV_P_ W w)
		1563	{
		1564	int pri = w->priority;
		1565	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1566	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1567	w->priority = pri;
		1568	}
		1569
		1570	void inline_speed
		1571	ev_start (EV_P_ W w, int active)
		1572	{
		1573	pri_adjust (EV_A_ w);
570	w->active = active;	1574	w->active = active;
		1575	ev_ref (EV_A);
571	}	1576	}
572		1577
573	static void	1578	void inline_size
574	ev_stop (W w)	1579	ev_stop (EV_P_ W w)
575	{	1580	{
576	if (w->pending)	1581	ev_unref (EV_A);
577	pendings [w->pending - 1].w = 0;
578
579	w->active = 0;	1582	w->active = 0;
580	}	1583	}
581		1584
582	/*****************************************************************************/	1585	/*****************************************************************************/
583		1586
584	void	1587	void
585	evio_start (struct ev_io *w)	1588	ev_io_start (EV_P_ ev_io *w)
		1589	{
		1590	int fd = w->fd;
		1591
		1592	if (expect_false (ev_is_active (w)))
		1593	return;
		1594
		1595	assert (("ev_io_start called with negative fd", fd >= 0));
		1596
		1597	ev_start (EV_A_ (W)w, 1);
		1598	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1599	wlist_add ((WL *)&anfds[fd].head, (WL)w);
		1600
		1601	fd_change (EV_A_ fd);
		1602	}
		1603
		1604	void
		1605	ev_io_stop (EV_P_ ev_io *w)
		1606	{
		1607	clear_pending (EV_A_ (W)w);
		1608	if (expect_false (!ev_is_active (w)))
		1609	return;
		1610
		1611	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1612
		1613	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
		1614	ev_stop (EV_A_ (W)w);
		1615
		1616	fd_change (EV_A_ w->fd);
		1617	}
		1618
		1619	void
		1620	ev_timer_start (EV_P_ ev_timer *w)
		1621	{
		1622	if (expect_false (ev_is_active (w)))
		1623	return;
		1624
		1625	((WT)w)->at += mn_now;
		1626
		1627	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1628
		1629	ev_start (EV_A_ (W)w, ++timercnt);
		1630	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
		1631	timers [timercnt - 1] = w;
		1632	upheap ((WT *)timers, timercnt - 1);
		1633
		1634	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1635	}
		1636
		1637	void
		1638	ev_timer_stop (EV_P_ ev_timer *w)
		1639	{
		1640	clear_pending (EV_A_ (W)w);
		1641	if (expect_false (!ev_is_active (w)))
		1642	return;
		1643
		1644	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1645
		1646	{
		1647	int active = ((W)w)->active;
		1648
		1649	if (expect_true (--active < --timercnt))
		1650	{
		1651	timers [active] = timers [timercnt];
		1652	adjustheap ((WT *)timers, timercnt, active);
		1653	}
		1654	}
		1655
		1656	((WT)w)->at -= mn_now;
		1657
		1658	ev_stop (EV_A_ (W)w);
		1659	}
		1660
		1661	void
		1662	ev_timer_again (EV_P_ ev_timer *w)
586	{	1663	{
587	if (ev_is_active (w))	1664	if (ev_is_active (w))
588	return;
589
590	int fd = w->fd;
591
592	ev_start ((W)w, 1);
593	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
594	wlist_add ((WL *)&anfds[fd].head, (WL)w);
595
596	++fdchangecnt;
597	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
598	fdchanges [fdchangecnt - 1] = fd;
599	}
600
601	void
602	evio_stop (struct ev_io *w)
603	{
604	if (!ev_is_active (w))
605	return;
606
607	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
608	ev_stop ((W)w);
609
610	++fdchangecnt;
611	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
612	fdchanges [fdchangecnt - 1] = w->fd;
613	}
614
615	void
616	evtimer_start (struct ev_timer *w)
617	{
618	if (ev_is_active (w))
619	return;
620
621	if (w->is_abs)
622	{	1665	{
623	/* this formula differs from the one in timer_reify becuse we do not round up */
624	if (w->repeat)	1666	if (w->repeat)
625	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
626
627	ev_start ((W)w, ++atimercnt);
628	array_needsize (atimers, atimermax, atimercnt, );
629	atimers [atimercnt - 1] = w;
630	upheap (atimers, atimercnt - 1);
631	}
632	else
633	{
634	w->at += now;
635
636	ev_start ((W)w, ++rtimercnt);
637	array_needsize (rtimers, rtimermax, rtimercnt, );
638	rtimers [rtimercnt - 1] = w;
639	upheap (rtimers, rtimercnt - 1);
640	}
641
642	}
643
644	void
645	evtimer_stop (struct ev_timer *w)
646	{
647	if (!ev_is_active (w))
648	return;
649
650	if (w->is_abs)
651	{
652	if (w->active < atimercnt--)
653	{	1667	{
654	atimers [w->active - 1] = atimers [atimercnt];	1668	((WT)w)->at = mn_now + w->repeat;
655	downheap (atimers, atimercnt, w->active - 1);	1669	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
656	}	1670	}
657	}
658	else	1671	else
		1672	ev_timer_stop (EV_A_ w);
659	{	1673	}
660	if (w->active < rtimercnt--)	1674	else if (w->repeat)
		1675	{
		1676	w->at = w->repeat;
		1677	ev_timer_start (EV_A_ w);
		1678	}
		1679	}
		1680
		1681	#if EV_PERIODIC_ENABLE
		1682	void
		1683	ev_periodic_start (EV_P_ ev_periodic *w)
		1684	{
		1685	if (expect_false (ev_is_active (w)))
		1686	return;
		1687
		1688	if (w->reschedule_cb)
		1689	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1690	else if (w->interval)
		1691	{
		1692	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1693	/* this formula differs from the one in periodic_reify because we do not always round up */
		1694	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1695	}
		1696
		1697	ev_start (EV_A_ (W)w, ++periodiccnt);
		1698	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
		1699	periodics [periodiccnt - 1] = w;
		1700	upheap ((WT *)periodics, periodiccnt - 1);
		1701
		1702	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1703	}
		1704
		1705	void
		1706	ev_periodic_stop (EV_P_ ev_periodic *w)
		1707	{
		1708	clear_pending (EV_A_ (W)w);
		1709	if (expect_false (!ev_is_active (w)))
		1710	return;
		1711
		1712	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1713
		1714	{
		1715	int active = ((W)w)->active;
		1716
		1717	if (expect_true (--active < --periodiccnt))
661	{	1718	{
662	rtimers [w->active - 1] = rtimers [rtimercnt];	1719	periodics [active] = periodics [periodiccnt];
663	downheap (rtimers, rtimercnt, w->active - 1);	1720	adjustheap ((WT *)periodics, periodiccnt, active);
664	}	1721	}
665	}	1722	}
666		1723
667	ev_stop ((W)w);	1724	ev_stop (EV_A_ (W)w);
668	}	1725	}
669		1726
670	void	1727	void
		1728	ev_periodic_again (EV_P_ ev_periodic *w)
		1729	{
		1730	/* TODO: use adjustheap and recalculation */
		1731	ev_periodic_stop (EV_A_ w);
		1732	ev_periodic_start (EV_A_ w);
		1733	}
		1734	#endif
		1735
		1736	#ifndef SA_RESTART
		1737	# define SA_RESTART 0
		1738	#endif
		1739
		1740	void
671	evsignal_start (struct ev_signal *w)	1741	ev_signal_start (EV_P_ ev_signal *w)
672	{	1742	{
		1743	#if EV_MULTIPLICITY
		1744	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1745	#endif
673	if (ev_is_active (w))	1746	if (expect_false (ev_is_active (w)))
674	return;	1747	return;
675		1748
		1749	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1750
676	ev_start ((W)w, 1);	1751	ev_start (EV_A_ (W)w, 1);
677	array_needsize (signals, signalmax, w->signum, signals_init);	1752	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
678	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1753	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
679		1754
680	if (!w->next)	1755	if (!((WL)w)->next)
681	{	1756	{
		1757	#if _WIN32
		1758	signal (w->signum, sighandler);
		1759	#else
682	struct sigaction sa;	1760	struct sigaction sa;
683	sa.sa_handler = sighandler;	1761	sa.sa_handler = sighandler;
684	sigfillset (&sa.sa_mask);	1762	sigfillset (&sa.sa_mask);
685	sa.sa_flags = 0;	1763	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
686	sigaction (w->signum, &sa, 0);	1764	sigaction (w->signum, &sa, 0);
		1765	#endif
687	}	1766	}
688	}	1767	}
689		1768
690	void	1769	void
691	evsignal_stop (struct ev_signal *w)	1770	ev_signal_stop (EV_P_ ev_signal *w)
692	{	1771	{
		1772	clear_pending (EV_A_ (W)w);
693	if (!ev_is_active (w))	1773	if (expect_false (!ev_is_active (w)))
694	return;	1774	return;
695		1775
696	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1776	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
697	ev_stop ((W)w);	1777	ev_stop (EV_A_ (W)w);
698		1778
699	if (!signals [w->signum - 1].head)	1779	if (!signals [w->signum - 1].head)
700	signal (w->signum, SIG_DFL);	1780	signal (w->signum, SIG_DFL);
701	}	1781	}
702		1782
703	void evidle_start (struct ev_idle *w)	1783	void
		1784	ev_child_start (EV_P_ ev_child *w)
704	{	1785	{
		1786	#if EV_MULTIPLICITY
		1787	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1788	#endif
705	if (ev_is_active (w))	1789	if (expect_false (ev_is_active (w)))
706	return;	1790	return;
707		1791
708	ev_start ((W)w, ++idlecnt);	1792	ev_start (EV_A_ (W)w, 1);
709	array_needsize (idles, idlemax, idlecnt, );	1793	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
710	idles [idlecnt - 1] = w;
711	}	1794	}
712		1795
713	void evidle_stop (struct ev_idle *w)	1796	void
		1797	ev_child_stop (EV_P_ ev_child *w)
714	{	1798	{
715	idles [w->active - 1] = idles [--idlecnt];	1799	clear_pending (EV_A_ (W)w);
		1800	if (expect_false (!ev_is_active (w)))
		1801	return;
		1802
		1803	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
716	ev_stop ((W)w);	1804	ev_stop (EV_A_ (W)w);
717	}	1805	}
718		1806
		1807	#if EV_STAT_ENABLE
		1808
		1809	# ifdef _WIN32
		1810	# undef lstat
		1811	# define lstat(a,b) _stati64 (a,b)
		1812	# endif
		1813
		1814	#define DEF_STAT_INTERVAL 5.0074891
		1815	#define MIN_STAT_INTERVAL 0.1074891
		1816
		1817	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1818
		1819	#if EV_USE_INOTIFY
		1820	# define EV_INOTIFY_BUFSIZE 8192
		1821
		1822	static void noinline
		1823	infy_add (EV_P_ ev_stat *w)
		1824	{
		1825	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);
		1826
		1827	if (w->wd < 0)
		1828	{
		1829	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1830
		1831	/* monitor some parent directory for speedup hints */
		1832	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1833	{
		1834	char path [4096];
		1835	strcpy (path, w->path);
		1836
		1837	do
		1838	{
		1839	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1840	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1841
		1842	char *pend = strrchr (path, '/');
		1843
		1844	if (!pend)
		1845	break; /* whoops, no '/', complain to your admin */
		1846
		1847	*pend = 0;
		1848	w->wd = inotify_add_watch (fs_fd, path, mask);
		1849	}
		1850	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1851	}
		1852	}
		1853	else
		1854	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1855
		1856	if (w->wd >= 0)
		1857	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1858	}
		1859
		1860	static void noinline
		1861	infy_del (EV_P_ ev_stat *w)
		1862	{
		1863	int slot;
		1864	int wd = w->wd;
		1865
		1866	if (wd < 0)
		1867	return;
		1868
		1869	w->wd = -2;
		1870	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1871	wlist_del (&fs_hash [slot].head, (WL)w);
		1872
		1873	/* remove this watcher, if others are watching it, they will rearm */
		1874	inotify_rm_watch (fs_fd, wd);
		1875	}
		1876
		1877	static void noinline
		1878	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1879	{
		1880	if (slot < 0)
		1881	/* overflow, need to check for all hahs slots */
		1882	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1883	infy_wd (EV_A_ slot, wd, ev);
		1884	else
		1885	{
		1886	WL w_;
		1887
		1888	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1889	{
		1890	ev_stat *w = (ev_stat *)w_;
		1891	w_ = w_->next; /* lets us remove this watcher and all before it */
		1892
		1893	if (w->wd == wd || wd == -1)
		1894	{
		1895	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		1896	{
		1897	w->wd = -1;
		1898	infy_add (EV_A_ w); /* re-add, no matter what */
		1899	}
		1900
		1901	stat_timer_cb (EV_A_ &w->timer, 0);
		1902	}
		1903	}
		1904	}
		1905	}
		1906
		1907	static void
		1908	infy_cb (EV_P_ ev_io *w, int revents)
		1909	{
		1910	char buf [EV_INOTIFY_BUFSIZE];
		1911	struct inotify_event *ev = (struct inotify_event *)buf;
		1912	int ofs;
		1913	int len = read (fs_fd, buf, sizeof (buf));
		1914
		1915	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1916	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1917	}
		1918
		1919	void inline_size
		1920	infy_init (EV_P)
		1921	{
		1922	if (fs_fd != -2)
		1923	return;
		1924
		1925	fs_fd = inotify_init ();
		1926
		1927	if (fs_fd >= 0)
		1928	{
		1929	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1930	ev_set_priority (&fs_w, EV_MAXPRI);
		1931	ev_io_start (EV_A_ &fs_w);
		1932	}
		1933	}
		1934
		1935	void inline_size
		1936	infy_fork (EV_P)
		1937	{
		1938	int slot;
		1939
		1940	if (fs_fd < 0)
		1941	return;
		1942
		1943	close (fs_fd);
		1944	fs_fd = inotify_init ();
		1945
		1946	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1947	{
		1948	WL w_ = fs_hash [slot].head;
		1949	fs_hash [slot].head = 0;
		1950
		1951	while (w_)
		1952	{
		1953	ev_stat *w = (ev_stat *)w_;
		1954	w_ = w_->next; /* lets us add this watcher */
		1955
		1956	w->wd = -1;
		1957
		1958	if (fs_fd >= 0)
		1959	infy_add (EV_A_ w); /* re-add, no matter what */
		1960	else
		1961	ev_timer_start (EV_A_ &w->timer);
		1962	}
		1963
		1964	}
		1965	}
		1966
		1967	#endif
		1968
		1969	void
		1970	ev_stat_stat (EV_P_ ev_stat *w)
		1971	{
		1972	if (lstat (w->path, &w->attr) < 0)
		1973	w->attr.st_nlink = 0;
		1974	else if (!w->attr.st_nlink)
		1975	w->attr.st_nlink = 1;
		1976	}
		1977
		1978	static void noinline
		1979	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1980	{
		1981	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		1982
		1983	/* we copy this here each the time so that */
		1984	/* prev has the old value when the callback gets invoked */
		1985	w->prev = w->attr;
		1986	ev_stat_stat (EV_A_ w);
		1987
		1988	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		1989	if (
		1990	w->prev.st_dev != w->attr.st_dev
		1991	|| w->prev.st_ino != w->attr.st_ino
		1992	|| w->prev.st_mode != w->attr.st_mode
		1993	|| w->prev.st_nlink != w->attr.st_nlink
		1994	|| w->prev.st_uid != w->attr.st_uid
		1995	|| w->prev.st_gid != w->attr.st_gid
		1996	|| w->prev.st_rdev != w->attr.st_rdev
		1997	|| w->prev.st_size != w->attr.st_size
		1998	|| w->prev.st_atime != w->attr.st_atime
		1999	|| w->prev.st_mtime != w->attr.st_mtime
		2000	|| w->prev.st_ctime != w->attr.st_ctime
		2001	) {
		2002	#if EV_USE_INOTIFY
		2003	infy_del (EV_A_ w);
		2004	infy_add (EV_A_ w);
		2005	ev_stat_stat (EV_A_ w); /* avoid race... */
		2006	#endif
		2007
		2008	ev_feed_event (EV_A_ w, EV_STAT);
		2009	}
		2010	}
		2011
		2012	void
		2013	ev_stat_start (EV_P_ ev_stat *w)
		2014	{
		2015	if (expect_false (ev_is_active (w)))
		2016	return;
		2017
		2018	/* since we use memcmp, we need to clear any padding data etc. */
		2019	memset (&w->prev, 0, sizeof (ev_statdata));
		2020	memset (&w->attr, 0, sizeof (ev_statdata));
		2021
		2022	ev_stat_stat (EV_A_ w);
		2023
		2024	if (w->interval < MIN_STAT_INTERVAL)
		2025	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2026
		2027	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2028	ev_set_priority (&w->timer, ev_priority (w));
		2029
		2030	#if EV_USE_INOTIFY
		2031	infy_init (EV_A);
		2032
		2033	if (fs_fd >= 0)
		2034	infy_add (EV_A_ w);
		2035	else
		2036	#endif
		2037	ev_timer_start (EV_A_ &w->timer);
		2038
		2039	ev_start (EV_A_ (W)w, 1);
		2040	}
		2041
		2042	void
		2043	ev_stat_stop (EV_P_ ev_stat *w)
		2044	{
		2045	clear_pending (EV_A_ (W)w);
		2046	if (expect_false (!ev_is_active (w)))
		2047	return;
		2048
		2049	#if EV_USE_INOTIFY
		2050	infy_del (EV_A_ w);
		2051	#endif
		2052	ev_timer_stop (EV_A_ &w->timer);
		2053
		2054	ev_stop (EV_A_ (W)w);
		2055	}
		2056	#endif
		2057
		2058	#if EV_IDLE_ENABLE
		2059	void
		2060	ev_idle_start (EV_P_ ev_idle *w)
		2061	{
		2062	if (expect_false (ev_is_active (w)))
		2063	return;
		2064
		2065	pri_adjust (EV_A_ (W)w);
		2066
		2067	{
		2068	int active = ++idlecnt [ABSPRI (w)];
		2069
		2070	++idleall;
		2071	ev_start (EV_A_ (W)w, active);
		2072
		2073	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2074	idles [ABSPRI (w)][active - 1] = w;
		2075	}
		2076	}
		2077
		2078	void
		2079	ev_idle_stop (EV_P_ ev_idle *w)
		2080	{
		2081	clear_pending (EV_A_ (W)w);
		2082	if (expect_false (!ev_is_active (w)))
		2083	return;
		2084
		2085	{
		2086	int active = ((W)w)->active;
		2087
		2088	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2089	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2090
		2091	ev_stop (EV_A_ (W)w);
		2092	--idleall;
		2093	}
		2094	}
		2095	#endif
		2096
		2097	void
		2098	ev_prepare_start (EV_P_ ev_prepare *w)
		2099	{
		2100	if (expect_false (ev_is_active (w)))
		2101	return;
		2102
		2103	ev_start (EV_A_ (W)w, ++preparecnt);
		2104	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2105	prepares [preparecnt - 1] = w;
		2106	}
		2107
		2108	void
		2109	ev_prepare_stop (EV_P_ ev_prepare *w)
		2110	{
		2111	clear_pending (EV_A_ (W)w);
		2112	if (expect_false (!ev_is_active (w)))
		2113	return;
		2114
		2115	{
		2116	int active = ((W)w)->active;
		2117	prepares [active - 1] = prepares [--preparecnt];
		2118	((W)prepares [active - 1])->active = active;
		2119	}
		2120
		2121	ev_stop (EV_A_ (W)w);
		2122	}
		2123
		2124	void
719	void evcheck_start (struct ev_check *w)	2125	ev_check_start (EV_P_ ev_check *w)
720	{	2126	{
721	if (ev_is_active (w))	2127	if (expect_false (ev_is_active (w)))
722	return;	2128	return;
723		2129
724	ev_start ((W)w, ++checkcnt);	2130	ev_start (EV_A_ (W)w, ++checkcnt);
725	array_needsize (checks, checkmax, checkcnt, );	2131	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
726	checks [checkcnt - 1] = w;	2132	checks [checkcnt - 1] = w;
727	}	2133	}
728		2134
		2135	void
729	void evcheck_stop (struct ev_check *w)	2136	ev_check_stop (EV_P_ ev_check *w)
730	{	2137	{
		2138	clear_pending (EV_A_ (W)w);
		2139	if (expect_false (!ev_is_active (w)))
		2140	return;
		2141
		2142	{
		2143	int active = ((W)w)->active;
731	checks [w->active - 1] = checks [--checkcnt];	2144	checks [active - 1] = checks [--checkcnt];
		2145	((W)checks [active - 1])->active = active;
		2146	}
		2147
732	ev_stop ((W)w);	2148	ev_stop (EV_A_ (W)w);
733	}	2149	}
		2150
		2151	#if EV_EMBED_ENABLE
		2152	void noinline
		2153	ev_embed_sweep (EV_P_ ev_embed *w)
		2154	{
		2155	ev_loop (w->loop, EVLOOP_NONBLOCK);
		2156	}
		2157
		2158	static void
		2159	embed_cb (EV_P_ ev_io *io, int revents)
		2160	{
		2161	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2162
		2163	if (ev_cb (w))
		2164	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2165	else
		2166	ev_embed_sweep (loop, w);
		2167	}
		2168
		2169	void
		2170	ev_embed_start (EV_P_ ev_embed *w)
		2171	{
		2172	if (expect_false (ev_is_active (w)))
		2173	return;
		2174
		2175	{
		2176	struct ev_loop *loop = w->loop;
		2177	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2178	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		2179	}
		2180
		2181	ev_set_priority (&w->io, ev_priority (w));
		2182	ev_io_start (EV_A_ &w->io);
		2183
		2184	ev_start (EV_A_ (W)w, 1);
		2185	}
		2186
		2187	void
		2188	ev_embed_stop (EV_P_ ev_embed *w)
		2189	{
		2190	clear_pending (EV_A_ (W)w);
		2191	if (expect_false (!ev_is_active (w)))
		2192	return;
		2193
		2194	ev_io_stop (EV_A_ &w->io);
		2195
		2196	ev_stop (EV_A_ (W)w);
		2197	}
		2198	#endif
		2199
		2200	#if EV_FORK_ENABLE
		2201	void
		2202	ev_fork_start (EV_P_ ev_fork *w)
		2203	{
		2204	if (expect_false (ev_is_active (w)))
		2205	return;
		2206
		2207	ev_start (EV_A_ (W)w, ++forkcnt);
		2208	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2209	forks [forkcnt - 1] = w;
		2210	}
		2211
		2212	void
		2213	ev_fork_stop (EV_P_ ev_fork *w)
		2214	{
		2215	clear_pending (EV_A_ (W)w);
		2216	if (expect_false (!ev_is_active (w)))
		2217	return;
		2218
		2219	{
		2220	int active = ((W)w)->active;
		2221	forks [active - 1] = forks [--forkcnt];
		2222	((W)forks [active - 1])->active = active;
		2223	}
		2224
		2225	ev_stop (EV_A_ (W)w);
		2226	}
		2227	#endif
734		2228
735	/*****************************************************************************/	2229	/*****************************************************************************/
736		2230
737	#if 0	2231	struct ev_once
		2232	{
		2233	ev_io io;
		2234	ev_timer to;
		2235	void (*cb)(int revents, void *arg);
		2236	void *arg;
		2237	};
738		2238
739	static void	2239	static void
740	sin_cb (struct ev_io *w, int revents)	2240	once_cb (EV_P_ struct ev_once *once, int revents)
741	{	2241	{
742	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2242	void (*cb)(int revents, void *arg) = once->cb;
		2243	void *arg = once->arg;
		2244
		2245	ev_io_stop (EV_A_ &once->io);
		2246	ev_timer_stop (EV_A_ &once->to);
		2247	ev_free (once);
		2248
		2249	cb (revents, arg);
743	}	2250	}
744		2251
745	static void	2252	static void
746	ocb (struct ev_timer *w, int revents)	2253	once_cb_io (EV_P_ ev_io *w, int revents)
747	{	2254	{
748	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2255	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
749	evtimer_stop (w);
750	evtimer_start (w);
751	}	2256	}
752		2257
753	static void	2258	static void
754	scb (struct ev_signal *w, int revents)	2259	once_cb_to (EV_P_ ev_timer *w, int revents)
755	{	2260	{
756	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	2261	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
757	}	2262	}
758		2263
759	static void	2264	void
760	gcb (struct ev_signal *w, int revents)	2265	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
761	{	2266	{
762	fprintf (stderr, "generic %x\n", revents);	2267	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
763	}
764		2268
765	int main (void)	2269	if (expect_false (!once))
766	{
767	struct ev_io sin;
768
769	ev_init (0);
770
771	evw_init (&sin, sin_cb, 55);
772	evio_set (&sin, 0, EV_READ);
773	evio_start (&sin);
774
775	struct ev_timer t[10000];
776
777	#if 0
778	int i;
779	for (i = 0; i < 10000; ++i)
780	{
781	struct ev_timer *w = t + i;
782	evw_init (w, ocb, i);
783	evtimer_set_abs (w, drand48 (), 0.99775533);
784	evtimer_start (w);
785	if (drand48 () < 0.5)
786	evtimer_stop (w);
787	}	2270	{
788	#endif	2271	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
789
790	struct ev_timer t1;
791	evw_init (&t1, ocb, 0);
792	evtimer_set_abs (&t1, 5, 10);
793	evtimer_start (&t1);
794
795	struct ev_signal sig;
796	evw_init (&sig, scb, 65535);
797	evsignal_set (&sig, SIGQUIT);
798	evsignal_start (&sig);
799
800	struct ev_check cw;
801	evw_init (&cw, gcb, 0);
802	evcheck_start (&cw);
803
804	struct ev_idle iw;
805	evw_init (&iw, gcb, 0);
806	evidle_start (&iw);
807
808	ev_loop (0);
809
810	return 0;	2272	return;
811	}	2273	}
812		2274
813	#endif	2275	once->cb = cb;
		2276	once->arg = arg;
814		2277
		2278	ev_init (&once->io, once_cb_io);
		2279	if (fd >= 0)
		2280	{
		2281	ev_io_set (&once->io, fd, events);
		2282	ev_io_start (EV_A_ &once->io);
		2283	}
815		2284
		2285	ev_init (&once->to, once_cb_to);
		2286	if (timeout >= 0.)
		2287	{
		2288	ev_timer_set (&once->to, timeout, 0.);
		2289	ev_timer_start (EV_A_ &once->to);
		2290	}
		2291	}
816		2292
		2293	#ifdef __cplusplus
		2294	}
		2295	#endif
817		2296

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