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Comparing libev/ev.c (file contents):
Revision 1.7 by root, Wed Oct 31 00:24:16 2007 UTC vs.
Revision 1.166 by root, Sat Dec 8 03:53:36 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
		121	#include <signal.h>
		122
		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
		138	# endif
		139	#endif
		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
		151	#ifndef EV_USE_SELECT
		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
		160	# endif
		161	#endif
		162
		163	#ifndef EV_USE_EPOLL
		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
		184	# endif
		185	#endif
		186
		187	#ifndef EV_INOTIFY_HASHSIZE
		188	# if EV_MINIMAL
		189	# define EV_INOTIFY_HASHSIZE 1
		190	# else
		191	# define EV_INOTIFY_HASHSIZE 16
		192	# endif
		193	#endif
		194
		195	/**/
		196
14	#ifdef CLOCK_MONOTONIC	197	#ifndef CLOCK_MONOTONIC
		198	# undef EV_USE_MONOTONIC
15	# define HAVE_MONOTONIC 1	199	# define EV_USE_MONOTONIC 0
16	#endif	200	#endif
17		201
		202	#ifndef CLOCK_REALTIME
		203	# undef EV_USE_REALTIME
18	#define HAVE_REALTIME 1	204	# define EV_USE_REALTIME 0
19	#define HAVE_EPOLL 1	205	#endif
20	#define HAVE_SELECT 1	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	/**/
21		220
22	#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) */
23	#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 */
24		224
		225	#if __GNUC__ >= 3
		226	# define expect(expr,value) __builtin_expect ((expr),(value))
		227	# define inline_size static inline /* inline for codesize */
		228	# if EV_MINIMAL
		229	# define noinline __attribute__ ((noinline))
		230	# define inline_speed static noinline
		231	# else
		232	# define noinline
		233	# define inline_speed static inline
		234	# endif
		235	#else
		236	# define expect(expr,value) (expr)
		237	# define inline_speed static
		238	# define inline_size static
		239	# define noinline
		240	#endif
		241
		242	#define expect_false(expr) expect ((expr) != 0, 0)
		243	#define expect_true(expr) expect ((expr) != 0, 1)
		244
		245	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		246	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		247
		248	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		249	#define EMPTY2(a,b) /* used to suppress some warnings */
		250
		251	typedef ev_watcher *W;
		252	typedef ev_watcher_list *WL;
		253	typedef ev_watcher_time *WT;
		254
		255	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		256
		257	#ifdef _WIN32
		258	# include "ev_win32.c"
		259	#endif
		260
		261	/*****************************************************************************/
		262
		263	static void (*syserr_cb)(const char *msg);
		264
		265	void
		266	ev_set_syserr_cb (void (*cb)(const char *msg))
		267	{
		268	syserr_cb = cb;
		269	}
		270
		271	static void noinline
		272	syserr (const char *msg)
		273	{
		274	if (!msg)
		275	msg = "(libev) system error";
		276
		277	if (syserr_cb)
		278	syserr_cb (msg);
		279	else
		280	{
		281	perror (msg);
		282	abort ();
		283	}
		284	}
		285
		286	static void *(*alloc)(void *ptr, long size);
		287
		288	void
		289	ev_set_allocator (void *(*cb)(void *ptr, long size))
		290	{
		291	alloc = cb;
		292	}
		293
		294	inline_speed void *
		295	ev_realloc (void *ptr, long size)
		296	{
		297	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		298
		299	if (!ptr && size)
		300	{
		301	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		302	abort ();
		303	}
		304
		305	return ptr;
		306	}
		307
		308	#define ev_malloc(size) ev_realloc (0, (size))
		309	#define ev_free(ptr) ev_realloc ((ptr), 0)
		310
		311	/*****************************************************************************/
		312
		313	typedef struct
		314	{
		315	WL head;
		316	unsigned char events;
		317	unsigned char reify;
		318	#if EV_SELECT_IS_WINSOCKET
		319	SOCKET handle;
		320	#endif
		321	} ANFD;
		322
		323	typedef struct
		324	{
		325	W w;
		326	int events;
		327	} ANPENDING;
		328
		329	#if EV_USE_INOTIFY
		330	typedef struct
		331	{
		332	WL head;
		333	} ANFS;
		334	#endif
		335
		336	#if EV_MULTIPLICITY
		337
		338	struct ev_loop
		339	{
		340	ev_tstamp ev_rt_now;
		341	#define ev_rt_now ((loop)->ev_rt_now)
		342	#define VAR(name,decl) decl;
		343	#include "ev_vars.h"
		344	#undef VAR
		345	};
25	#include "ev.h"	346	#include "ev_wrap.h"
26		347
27	struct ev_watcher {	348	static struct ev_loop default_loop_struct;
28	EV_WATCHER (ev_watcher);	349	struct ev_loop *ev_default_loop_ptr;
29	};
30		350
31	struct ev_watcher_list {	351	#else
32	EV_WATCHER_LIST (ev_watcher_list);
33	};
34		352
35	static ev_tstamp now, diff; /* monotonic clock */
36	ev_tstamp ev_now;	353	ev_tstamp ev_rt_now;
37	int ev_method;	354	#define VAR(name,decl) static decl;
		355	#include "ev_vars.h"
		356	#undef VAR
38		357
39	static int have_monotonic; /* runtime */	358	static int ev_default_loop_ptr;
40		359
41	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	360	#endif
42	static void (*method_modify)(int fd, int oev, int nev);	361
43	static void (*method_poll)(ev_tstamp timeout);	362	/*****************************************************************************/
44		363
45	ev_tstamp	364	ev_tstamp
46	ev_time (void)	365	ev_time (void)
47	{	366	{
48	#if HAVE_REALTIME	367	#if EV_USE_REALTIME
49	struct timespec ts;	368	struct timespec ts;
50	clock_gettime (CLOCK_REALTIME, &ts);	369	clock_gettime (CLOCK_REALTIME, &ts);
51	return ts.tv_sec + ts.tv_nsec * 1e-9;	370	return ts.tv_sec + ts.tv_nsec * 1e-9;
52	#else	371	#else
53	struct timeval tv;	372	struct timeval tv;
54	gettimeofday (&tv, 0);	373	gettimeofday (&tv, 0);
55	return tv.tv_sec + tv.tv_usec * 1e-6;	374	return tv.tv_sec + tv.tv_usec * 1e-6;
56	#endif	375	#endif
57	}	376	}
58		377
59	static ev_tstamp	378	ev_tstamp inline_size
60	get_clock (void)	379	get_clock (void)
61	{	380	{
62	#if HAVE_MONOTONIC	381	#if EV_USE_MONOTONIC
63	if (have_monotonic)	382	if (expect_true (have_monotonic))
64	{	383	{
65	struct timespec ts;	384	struct timespec ts;
66	clock_gettime (CLOCK_MONOTONIC, &ts);	385	clock_gettime (CLOCK_MONOTONIC, &ts);
67	return ts.tv_sec + ts.tv_nsec * 1e-9;	386	return ts.tv_sec + ts.tv_nsec * 1e-9;
68	}	387	}
69	#endif	388	#endif
70		389
71	return ev_time ();	390	return ev_time ();
72	}	391	}
73		392
		393	#if EV_MULTIPLICITY
		394	ev_tstamp
		395	ev_now (EV_P)
		396	{
		397	return ev_rt_now;
		398	}
		399	#endif
		400
		401	int inline_size
		402	array_nextsize (int elem, int cur, int cnt)
		403	{
		404	int ncur = cur + 1;
		405
		406	do
		407	ncur <<= 1;
		408	while (cnt > ncur);
		409
		410	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		411	if (elem * ncur > 4096)
		412	{
		413	ncur *= elem;
		414	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		415	ncur = ncur - sizeof (void *) * 4;
		416	ncur /= elem;
		417	}
		418
		419	return ncur;
		420	}
		421
		422	inline_speed void *
		423	array_realloc (int elem, void *base, int *cur, int cnt)
		424	{
		425	*cur = array_nextsize (elem, *cur, cnt);
		426	return ev_realloc (base, elem * *cur);
		427	}
		428
74	#define array_needsize(base,cur,cnt,init) \	429	#define array_needsize(type,base,cur,cnt,init) \
75	if ((cnt) > cur) \	430	if (expect_false ((cnt) > (cur))) \
76	{ \	431	{ \
77	int newcnt = cur ? cur << 1 : 16; \	432	int ocur_ = (cur); \
78	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	433	(base) = (type *)array_realloc \
79	base = realloc (base, sizeof (*base) * (newcnt)); \	434	(sizeof (type), (base), &(cur), (cnt)); \
80	init (base + cur, newcnt - cur); \	435	init ((base) + (ocur_), (cur) - ocur_); \
81	cur = newcnt; \	436	}
		437
		438	#if 0
		439	#define array_slim(type,stem) \
		440	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		441	{ \
		442	stem ## max = array_roundsize (stem ## cnt >> 1); \
		443	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		444	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		445	}
		446	#endif
		447
		448	#define array_free(stem, idx) \
		449	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		450
		451	/*****************************************************************************/
		452
		453	void noinline
		454	ev_feed_event (EV_P_ void *w, int revents)
		455	{
		456	W w_ = (W)w;
		457
		458	if (expect_false (w_->pending))
		459	{
		460	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		461	return;
		462	}
		463
		464	w_->pending = ++pendingcnt [ABSPRI (w_)];
		465	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		466	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		467	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		468	}
		469
		470	void inline_size
		471	queue_events (EV_P_ W *events, int eventcnt, int type)
		472	{
		473	int i;
		474
		475	for (i = 0; i < eventcnt; ++i)
		476	ev_feed_event (EV_A_ events [i], type);
		477	}
		478
		479	/*****************************************************************************/
		480
		481	void inline_size
		482	anfds_init (ANFD *base, int count)
		483	{
		484	while (count--)
		485	{
		486	base->head = 0;
		487	base->events = EV_NONE;
		488	base->reify = 0;
		489
		490	++base;
		491	}
		492	}
		493
		494	void inline_speed
		495	fd_event (EV_P_ int fd, int revents)
		496	{
		497	ANFD *anfd = anfds + fd;
		498	ev_io *w;
		499
		500	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		501	{
		502	int ev = w->events & revents;
		503
		504	if (ev)
		505	ev_feed_event (EV_A_ (W)w, ev);
		506	}
		507	}
		508
		509	void
		510	ev_feed_fd_event (EV_P_ int fd, int revents)
		511	{
		512	fd_event (EV_A_ fd, revents);
		513	}
		514
		515	void inline_size
		516	fd_reify (EV_P)
		517	{
		518	int i;
		519
		520	for (i = 0; i < fdchangecnt; ++i)
		521	{
		522	int fd = fdchanges [i];
		523	ANFD *anfd = anfds + fd;
		524	ev_io *w;
		525
		526	int events = 0;
		527
		528	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		529	events |= w->events;
		530
		531	#if EV_SELECT_IS_WINSOCKET
		532	if (events)
		533	{
		534	unsigned long argp;
		535	anfd->handle = _get_osfhandle (fd);
		536	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		537	}
		538	#endif
		539
		540	anfd->reify = 0;
		541
		542	backend_modify (EV_A_ fd, anfd->events, events);
		543	anfd->events = events;
		544	}
		545
		546	fdchangecnt = 0;
		547	}
		548
		549	void inline_size
		550	fd_change (EV_P_ int fd)
		551	{
		552	if (expect_false (anfds [fd].reify))
		553	return;
		554
		555	anfds [fd].reify = 1;
		556
		557	++fdchangecnt;
		558	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		559	fdchanges [fdchangecnt - 1] = fd;
		560	}
		561
		562	void inline_speed
		563	fd_kill (EV_P_ int fd)
		564	{
		565	ev_io *w;
		566
		567	while ((w = (ev_io *)anfds [fd].head))
		568	{
		569	ev_io_stop (EV_A_ w);
		570	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		571	}
		572	}
		573
		574	int inline_size
		575	fd_valid (int fd)
		576	{
		577	#ifdef _WIN32
		578	return _get_osfhandle (fd) != -1;
		579	#else
		580	return fcntl (fd, F_GETFD) != -1;
		581	#endif
		582	}
		583
		584	/* called on EBADF to verify fds */
		585	static void noinline
		586	fd_ebadf (EV_P)
		587	{
		588	int fd;
		589
		590	for (fd = 0; fd < anfdmax; ++fd)
		591	if (anfds [fd].events)
		592	if (!fd_valid (fd) == -1 && errno == EBADF)
		593	fd_kill (EV_A_ fd);
		594	}
		595
		596	/* called on ENOMEM in select/poll to kill some fds and retry */
		597	static void noinline
		598	fd_enomem (EV_P)
		599	{
		600	int fd;
		601
		602	for (fd = anfdmax; fd--; )
		603	if (anfds [fd].events)
		604	{
		605	fd_kill (EV_A_ fd);
		606	return;
82	}	607	}
		608	}
		609
		610	/* usually called after fork if backend needs to re-arm all fds from scratch */
		611	static void noinline
		612	fd_rearm_all (EV_P)
		613	{
		614	int fd;
		615
		616	for (fd = 0; fd < anfdmax; ++fd)
		617	if (anfds [fd].events)
		618	{
		619	anfds [fd].events = 0;
		620	fd_change (EV_A_ fd);
		621	}
		622	}
		623
		624	/*****************************************************************************/
		625
		626	void inline_speed
		627	upheap (WT *heap, int k)
		628	{
		629	WT w = heap [k];
		630
		631	while (k && heap [k >> 1]->at > w->at)
		632	{
		633	heap [k] = heap [k >> 1];
		634	((W)heap [k])->active = k + 1;
		635	k >>= 1;
		636	}
		637
		638	heap [k] = w;
		639	((W)heap [k])->active = k + 1;
		640
		641	}
		642
		643	void inline_speed
		644	downheap (WT *heap, int N, int k)
		645	{
		646	WT w = heap [k];
		647
		648	while (k < (N >> 1))
		649	{
		650	int j = k << 1;
		651
		652	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		653	++j;
		654
		655	if (w->at <= heap [j]->at)
		656	break;
		657
		658	heap [k] = heap [j];
		659	((W)heap [k])->active = k + 1;
		660	k = j;
		661	}
		662
		663	heap [k] = w;
		664	((W)heap [k])->active = k + 1;
		665	}
		666
		667	void inline_size
		668	adjustheap (WT *heap, int N, int k)
		669	{
		670	upheap (heap, k);
		671	downheap (heap, N, k);
		672	}
		673
		674	/*****************************************************************************/
83		675
84	typedef struct	676	typedef struct
85	{	677	{
86	struct ev_io *head;	678	WL head;
87	unsigned char wev, rev; /* want, received event set */
88	} ANFD;
89
90	static ANFD *anfds;
91	static int anfdmax;
92
93	static int *fdchanges;
94	static int fdchangemax, fdchangecnt;
95
96	static void
97	anfds_init (ANFD *base, int count)
98	{
99	while (count--)
100	{
101	base->head = 0;
102	base->wev = base->rev = EV_NONE;
103	++base;
104	}
105	}
106
107	typedef struct
108	{
109	struct ev_watcher *w;
110	int events;
111	} ANPENDING;
112
113	static ANPENDING *pendings;
114	static int pendingmax, pendingcnt;
115
116	static void
117	event (struct ev_watcher *w, int events)
118	{
119	w->pending = ++pendingcnt;
120	array_needsize (pendings, pendingmax, pendingcnt, );
121	pendings [pendingcnt - 1].w = w;
122	pendings [pendingcnt - 1].events = events;
123	}
124
125	static void
126	fd_event (int fd, int events)
127	{
128	ANFD *anfd = anfds + fd;
129	struct ev_io *w;
130
131	for (w = anfd->head; w; w = w->next)
132	{
133	int ev = w->events & events;
134
135	if (ev)
136	event ((struct ev_watcher *)w, ev);
137	}
138	}
139
140	static struct ev_timer **atimers;
141	static int atimermax, atimercnt;
142
143	static struct ev_timer **rtimers;
144	static int rtimermax, rtimercnt;
145
146	static void
147	upheap (struct ev_timer **timers, int k)
148	{
149	struct ev_timer *w = timers [k];
150
151	while (k && timers [k >> 1]->at > w->at)
152	{
153	timers [k] = timers [k >> 1];
154	timers [k]->active = k + 1;
155	k >>= 1;
156	}
157
158	timers [k] = w;
159	timers [k]->active = k + 1;
160
161	}
162
163	static void
164	downheap (struct ev_timer **timers, int N, int k)
165	{
166	struct ev_timer *w = timers [k];
167
168	while (k < (N >> 1))
169	{
170	int j = k << 1;
171
172	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
173	++j;
174
175	if (w->at <= timers [j]->at)
176	break;
177
178	timers [k] = timers [j];
179	timers [k]->active = k + 1;
180	k = j;
181	}
182
183	timers [k] = w;
184	timers [k]->active = k + 1;
185	}
186
187	typedef struct
188	{
189	struct ev_signal *head;
190	sig_atomic_t gotsig;	679	sig_atomic_t volatile gotsig;
191	} ANSIG;	680	} ANSIG;
192		681
193	static ANSIG *signals;	682	static ANSIG *signals;
194	static int signalmax;	683	static int signalmax;
195		684
196	static int sigpipe [2];	685	static int sigpipe [2];
197	static sig_atomic_t gotsig;	686	static sig_atomic_t volatile gotsig;
198	static struct ev_io sigev;	687	static ev_io sigev;
199		688
200	static void	689	void inline_size
201	signals_init (ANSIG *base, int count)	690	signals_init (ANSIG *base, int count)
202	{	691	{
203	while (count--)	692	while (count--)
204	{	693	{
205	base->head = 0;	694	base->head = 0;
206	base->gotsig = 0;	695	base->gotsig = 0;
		696
207	++base;	697	++base;
208	}	698	}
209	}	699	}
210		700
211	static void	701	static void
212	sighandler (int signum)	702	sighandler (int signum)
213	{	703	{
		704	#if _WIN32
		705	signal (signum, sighandler);
		706	#endif
		707
214	signals [signum - 1].gotsig = 1;	708	signals [signum - 1].gotsig = 1;
215		709
216	if (!gotsig)	710	if (!gotsig)
217	{	711	{
		712	int old_errno = errno;
218	gotsig = 1;	713	gotsig = 1;
219	write (sigpipe [1], &gotsig, 1);	714	write (sigpipe [1], &signum, 1);
		715	errno = old_errno;
220	}	716	}
		717	}
		718
		719	void noinline
		720	ev_feed_signal_event (EV_P_ int signum)
		721	{
		722	WL w;
		723
		724	#if EV_MULTIPLICITY
		725	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		726	#endif
		727
		728	--signum;
		729
		730	if (signum < 0 || signum >= signalmax)
		731	return;
		732
		733	signals [signum].gotsig = 0;
		734
		735	for (w = signals [signum].head; w; w = w->next)
		736	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
221	}	737	}
222		738
223	static void	739	static void
224	sigcb (struct ev_io *iow, int revents)	740	sigcb (EV_P_ ev_io *iow, int revents)
225	{	741	{
226	struct ev_signal *w;
227	int sig;	742	int signum;
228		743
		744	read (sigpipe [0], &revents, 1);
229	gotsig = 0;	745	gotsig = 0;
230	read (sigpipe [0], &revents, 1);
231		746
232	for (sig = signalmax; sig--; )	747	for (signum = signalmax; signum--; )
233	if (signals [sig].gotsig)	748	if (signals [signum].gotsig)
		749	ev_feed_signal_event (EV_A_ signum + 1);
		750	}
		751
		752	void inline_size
		753	fd_intern (int fd)
		754	{
		755	#ifdef _WIN32
		756	int arg = 1;
		757	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		758	#else
		759	fcntl (fd, F_SETFD, FD_CLOEXEC);
		760	fcntl (fd, F_SETFL, O_NONBLOCK);
		761	#endif
		762	}
		763
		764	static void noinline
		765	siginit (EV_P)
		766	{
		767	fd_intern (sigpipe [0]);
		768	fd_intern (sigpipe [1]);
		769
		770	ev_io_set (&sigev, sigpipe [0], EV_READ);
		771	ev_io_start (EV_A_ &sigev);
		772	ev_unref (EV_A); /* child watcher should not keep loop alive */
		773	}
		774
		775	/*****************************************************************************/
		776
		777	static ev_child *childs [EV_PID_HASHSIZE];
		778
		779	#ifndef _WIN32
		780
		781	static ev_signal childev;
		782
		783	void inline_speed
		784	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		785	{
		786	ev_child *w;
		787
		788	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		789	if (w->pid == pid || !w->pid)
234	{	790	{
235	signals [sig].gotsig = 0;	791	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
236		792	w->rpid = pid;
237	for (w = signals [sig].head; w; w = w->next)	793	w->rstatus = status;
238	event ((struct ev_watcher *)w, EV_SIGNAL);	794	ev_feed_event (EV_A_ (W)w, EV_CHILD);
239	}	795	}
240	}	796	}
241		797
		798	#ifndef WCONTINUED
		799	# define WCONTINUED 0
		800	#endif
		801
242	static void	802	static void
243	siginit (void)	803	childcb (EV_P_ ev_signal *sw, int revents)
244	{	804	{
245	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	805	int pid, status;
246	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
247		806
248	/* rather than sort out wether we really need nb, set it */	807	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
249	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	808	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
250	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	809	if (!WCONTINUED
		810	|| errno != EINVAL
		811	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		812	return;
251		813
252	evio_set (&sigev, sigpipe [0], EV_READ);	814	/* make sure we are called again until all childs have been reaped */
253	evio_start (&sigev);	815	/* we need to do it this way so that the callback gets called before we continue */
254	}	816	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
255		817
		818	child_reap (EV_A_ sw, pid, pid, status);
		819	if (EV_PID_HASHSIZE > 1)
		820	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		821	}
		822
		823	#endif
		824
		825	/*****************************************************************************/
		826
		827	#if EV_USE_PORT
		828	# include "ev_port.c"
		829	#endif
		830	#if EV_USE_KQUEUE
		831	# include "ev_kqueue.c"
		832	#endif
256	#if HAVE_EPOLL	833	#if EV_USE_EPOLL
257	# include "ev_epoll.c"	834	# include "ev_epoll.c"
258	#endif	835	#endif
		836	#if EV_USE_POLL
		837	# include "ev_poll.c"
		838	#endif
259	#if HAVE_SELECT	839	#if EV_USE_SELECT
260	# include "ev_select.c"	840	# include "ev_select.c"
261	#endif	841	#endif
262		842
263	int ev_init (int flags)	843	int
		844	ev_version_major (void)
264	{	845	{
		846	return EV_VERSION_MAJOR;
		847	}
		848
		849	int
		850	ev_version_minor (void)
		851	{
		852	return EV_VERSION_MINOR;
		853	}
		854
		855	/* return true if we are running with elevated privileges and should ignore env variables */
		856	int inline_size
		857	enable_secure (void)
		858	{
		859	#ifdef _WIN32
		860	return 0;
		861	#else
		862	return getuid () != geteuid ()
		863	|| getgid () != getegid ();
		864	#endif
		865	}
		866
		867	unsigned int
		868	ev_supported_backends (void)
		869	{
		870	unsigned int flags = 0;
		871
		872	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		873	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		874	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		875	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		876	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		877
		878	return flags;
		879	}
		880
		881	unsigned int
		882	ev_recommended_backends (void)
		883	{
		884	unsigned int flags = ev_supported_backends ();
		885
		886	#ifndef __NetBSD__
		887	/* kqueue is borked on everything but netbsd apparently */
		888	/* it usually doesn't work correctly on anything but sockets and pipes */
		889	flags &= ~EVBACKEND_KQUEUE;
		890	#endif
		891	#ifdef __APPLE__
		892	// flags &= ~EVBACKEND_KQUEUE; for documentation
		893	flags &= ~EVBACKEND_POLL;
		894	#endif
		895
		896	return flags;
		897	}
		898
		899	unsigned int
		900	ev_embeddable_backends (void)
		901	{
		902	return EVBACKEND_EPOLL
		903	| EVBACKEND_KQUEUE
		904	| EVBACKEND_PORT;
		905	}
		906
		907	unsigned int
		908	ev_backend (EV_P)
		909	{
		910	return backend;
		911	}
		912
		913	unsigned int
		914	ev_loop_count (EV_P)
		915	{
		916	return loop_count;
		917	}
		918
		919	static void noinline
		920	loop_init (EV_P_ unsigned int flags)
		921	{
		922	if (!backend)
		923	{
265	#if HAVE_MONOTONIC	924	#if EV_USE_MONOTONIC
266	{	925	{
267	struct timespec ts;	926	struct timespec ts;
268	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	927	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
269	have_monotonic = 1;	928	have_monotonic = 1;
270	}	929	}
271	#endif	930	#endif
272		931
273	ev_now = ev_time ();	932	ev_rt_now = ev_time ();
274	now = get_clock ();	933	mn_now = get_clock ();
275	diff = ev_now - now;	934	now_floor = mn_now;
		935	rtmn_diff = ev_rt_now - mn_now;
276		936
277	if (pipe (sigpipe))	937	/* pid check not overridable via env */
278	return 0;	938	#ifndef _WIN32
		939	if (flags & EVFLAG_FORKCHECK)
		940	curpid = getpid ();
		941	#endif
279		942
280	ev_method = EVMETHOD_NONE;	943	if (!(flags & EVFLAG_NOENV)
		944	&& !enable_secure ()
		945	&& getenv ("LIBEV_FLAGS"))
		946	flags = atoi (getenv ("LIBEV_FLAGS"));
		947
		948	if (!(flags & 0x0000ffffUL))
		949	flags |= ev_recommended_backends ();
		950
		951	backend = 0;
		952	backend_fd = -1;
		953	#if EV_USE_INOTIFY
		954	fs_fd = -2;
		955	#endif
		956
		957	#if EV_USE_PORT
		958	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		959	#endif
		960	#if EV_USE_KQUEUE
		961	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		962	#endif
281	#if HAVE_EPOLL	963	#if EV_USE_EPOLL
282	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	964	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
283	#endif	965	#endif
		966	#if EV_USE_POLL
		967	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		968	#endif
284	#if HAVE_SELECT	969	#if EV_USE_SELECT
285	if (ev_method == EVMETHOD_NONE) select_init (flags);	970	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
286	#endif	971	#endif
287		972
288	if (ev_method)
289	{
290	evw_init (&sigev, sigcb, 0);	973	ev_init (&sigev, sigcb);
291	siginit ();	974	ev_set_priority (&sigev, EV_MAXPRI);
292	}	975	}
293
294	return ev_method;
295	}	976	}
296		977
297	void ev_prefork (void)	978	static void noinline
298	{	979	loop_destroy (EV_P)
299	}
300
301	void ev_postfork_parent (void)
302	{
303	}
304
305	void ev_postfork_child (void)
306	{
307	#if HAVE_EPOLL
308	if (ev_method == EVMETHOD_EPOLL)
309	epoll_postfork_child ();
310	#endif
311
312	evio_stop (&sigev);
313	close (sigpipe [0]);
314	close (sigpipe [1]);
315	pipe (sigpipe);
316	siginit ();
317	}
318
319	static void
320	fd_reify (void)
321	{	980	{
322	int i;	981	int i;
323		982
324	for (i = 0; i < fdchangecnt; ++i)	983	#if EV_USE_INOTIFY
		984	if (fs_fd >= 0)
		985	close (fs_fd);
		986	#endif
		987
		988	if (backend_fd >= 0)
		989	close (backend_fd);
		990
		991	#if EV_USE_PORT
		992	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		993	#endif
		994	#if EV_USE_KQUEUE
		995	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		996	#endif
		997	#if EV_USE_EPOLL
		998	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		999	#endif
		1000	#if EV_USE_POLL
		1001	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1002	#endif
		1003	#if EV_USE_SELECT
		1004	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1005	#endif
		1006
		1007	for (i = NUMPRI; i--; )
		1008	{
		1009	array_free (pending, [i]);
		1010	#if EV_IDLE_ENABLE
		1011	array_free (idle, [i]);
		1012	#endif
325	{	1013	}
326	int fd = fdchanges [i];
327	ANFD *anfd = anfds + fd;
328	struct ev_io *w;
329		1014
330	int wev = 0;	1015	/* have to use the microsoft-never-gets-it-right macro */
		1016	array_free (fdchange, EMPTY);
		1017	array_free (timer, EMPTY);
		1018	#if EV_PERIODIC_ENABLE
		1019	array_free (periodic, EMPTY);
		1020	#endif
		1021	array_free (prepare, EMPTY);
		1022	array_free (check, EMPTY);
331		1023
332	for (w = anfd->head; w; w = w->next)	1024	backend = 0;
333	wev |= w->events;	1025	}
334		1026
335	if (anfd->wev != wev)	1027	void inline_size infy_fork (EV_P);
		1028
		1029	void inline_size
		1030	loop_fork (EV_P)
		1031	{
		1032	#if EV_USE_PORT
		1033	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1034	#endif
		1035	#if EV_USE_KQUEUE
		1036	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1037	#endif
		1038	#if EV_USE_EPOLL
		1039	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1040	#endif
		1041	#if EV_USE_INOTIFY
		1042	infy_fork (EV_A);
		1043	#endif
		1044
		1045	if (ev_is_active (&sigev))
		1046	{
		1047	/* default loop */
		1048
		1049	ev_ref (EV_A);
		1050	ev_io_stop (EV_A_ &sigev);
		1051	close (sigpipe [0]);
		1052	close (sigpipe [1]);
		1053
		1054	while (pipe (sigpipe))
		1055	syserr ("(libev) error creating pipe");
		1056
		1057	siginit (EV_A);
		1058	}
		1059
		1060	postfork = 0;
		1061	}
		1062
		1063	#if EV_MULTIPLICITY
		1064	struct ev_loop *
		1065	ev_loop_new (unsigned int flags)
		1066	{
		1067	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1068
		1069	memset (loop, 0, sizeof (struct ev_loop));
		1070
		1071	loop_init (EV_A_ flags);
		1072
		1073	if (ev_backend (EV_A))
		1074	return loop;
		1075
		1076	return 0;
		1077	}
		1078
		1079	void
		1080	ev_loop_destroy (EV_P)
		1081	{
		1082	loop_destroy (EV_A);
		1083	ev_free (loop);
		1084	}
		1085
		1086	void
		1087	ev_loop_fork (EV_P)
		1088	{
		1089	postfork = 1;
		1090	}
		1091
		1092	#endif
		1093
		1094	#if EV_MULTIPLICITY
		1095	struct ev_loop *
		1096	ev_default_loop_init (unsigned int flags)
		1097	#else
		1098	int
		1099	ev_default_loop (unsigned int flags)
		1100	#endif
		1101	{
		1102	if (sigpipe [0] == sigpipe [1])
		1103	if (pipe (sigpipe))
		1104	return 0;
		1105
		1106	if (!ev_default_loop_ptr)
		1107	{
		1108	#if EV_MULTIPLICITY
		1109	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1110	#else
		1111	ev_default_loop_ptr = 1;
		1112	#endif
		1113
		1114	loop_init (EV_A_ flags);
		1115
		1116	if (ev_backend (EV_A))
336	{	1117	{
337	method_modify (fd, anfd->wev, wev);	1118	siginit (EV_A);
338	anfd->wev = wev;	1119
		1120	#ifndef _WIN32
		1121	ev_signal_init (&childev, childcb, SIGCHLD);
		1122	ev_set_priority (&childev, EV_MAXPRI);
		1123	ev_signal_start (EV_A_ &childev);
		1124	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1125	#endif
339	}	1126	}
		1127	else
		1128	ev_default_loop_ptr = 0;
340	}	1129	}
341		1130
342	fdchangecnt = 0;	1131	return ev_default_loop_ptr;
343	}	1132	}
344		1133
345	static void	1134	void
		1135	ev_default_destroy (void)
		1136	{
		1137	#if EV_MULTIPLICITY
		1138	struct ev_loop *loop = ev_default_loop_ptr;
		1139	#endif
		1140
		1141	#ifndef _WIN32
		1142	ev_ref (EV_A); /* child watcher */
		1143	ev_signal_stop (EV_A_ &childev);
		1144	#endif
		1145
		1146	ev_ref (EV_A); /* signal watcher */
		1147	ev_io_stop (EV_A_ &sigev);
		1148
		1149	close (sigpipe [0]); sigpipe [0] = 0;
		1150	close (sigpipe [1]); sigpipe [1] = 0;
		1151
		1152	loop_destroy (EV_A);
		1153	}
		1154
		1155	void
		1156	ev_default_fork (void)
		1157	{
		1158	#if EV_MULTIPLICITY
		1159	struct ev_loop *loop = ev_default_loop_ptr;
		1160	#endif
		1161
		1162	if (backend)
		1163	postfork = 1;
		1164	}
		1165
		1166	/*****************************************************************************/
		1167
		1168	void inline_speed
346	call_pending ()	1169	call_pending (EV_P)
347	{	1170	{
348	int i;	1171	int pri;
349		1172
350	for (i = 0; i < pendingcnt; ++i)	1173	for (pri = NUMPRI; pri--; )
		1174	while (pendingcnt [pri])
351	{	1175	{
352	ANPENDING *p = pendings + i;	1176	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
353		1177
354	if (p->w)	1178	if (expect_true (p->w))
355	{	1179	{
		1180	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1181
356	p->w->pending = 0;	1182	p->w->pending = 0;
357	p->w->cb (p->w, p->events);	1183	EV_CB_INVOKE (p->w, p->events);
358	}	1184	}
359	}	1185	}
360
361	pendingcnt = 0;
362	}	1186	}
363		1187
364	static void	1188	void inline_size
365	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	1189	timers_reify (EV_P)
366	{	1190	{
367	while (timercnt && timers [0]->at <= now)	1191	while (timercnt && ((WT)timers [0])->at <= mn_now)
368	{	1192	{
369	struct ev_timer *w = timers [0];	1193	ev_timer *w = timers [0];
		1194
		1195	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
370		1196
371	/* first reschedule or stop timer */	1197	/* first reschedule or stop timer */
372	if (w->repeat)	1198	if (w->repeat)
373	{	1199	{
374	if (w->is_abs)	1200	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
375	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;	1201
376	else
377	w->at = now + w->repeat;	1202	((WT)w)->at += w->repeat;
		1203	if (((WT)w)->at < mn_now)
		1204	((WT)w)->at = mn_now;
378		1205
379	assert (w->at > now);
380
381	downheap (timers, timercnt, 0);	1206	downheap ((WT *)timers, timercnt, 0);
382	}	1207	}
383	else	1208	else
		1209	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1210
		1211	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1212	}
		1213	}
		1214
		1215	#if EV_PERIODIC_ENABLE
		1216	void inline_size
		1217	periodics_reify (EV_P)
		1218	{
		1219	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
		1220	{
		1221	ev_periodic *w = periodics [0];
		1222
		1223	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
		1224
		1225	/* first reschedule or stop timer */
		1226	if (w->reschedule_cb)
384	{	1227	{
385	evtimer_stop (w); /* nonrepeating: stop timer */	1228	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
386	--timercnt; /* maybe pass by reference instead? */	1229	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1230	downheap ((WT *)periodics, periodiccnt, 0);
387	}	1231	}
		1232	else if (w->interval)
		1233	{
		1234	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
		1235	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1236	downheap ((WT *)periodics, periodiccnt, 0);
		1237	}
		1238	else
		1239	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
388		1240
389	event ((struct ev_watcher *)w, EV_TIMEOUT);	1241	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
390	}	1242	}
391	}	1243	}
392		1244
393	static void	1245	static void noinline
394	time_update ()	1246	periodics_reschedule (EV_P)
395	{	1247	{
396	int i;	1248	int i;
397	ev_now = ev_time ();
398		1249
399	if (have_monotonic)	1250	/* adjust periodics after time jump */
		1251	for (i = 0; i < periodiccnt; ++i)
		1252	{
		1253	ev_periodic *w = periodics [i];
		1254
		1255	if (w->reschedule_cb)
		1256	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1257	else if (w->interval)
		1258	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
400	{	1259	}
401	ev_tstamp odiff = diff;
402		1260
403	/* detecting time jumps is much more difficult */	1261	/* now rebuild the heap */
404	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1262	for (i = periodiccnt >> 1; i--; )
		1263	downheap ((WT *)periodics, periodiccnt, i);
		1264	}
		1265	#endif
		1266
		1267	#if EV_IDLE_ENABLE
		1268	void inline_size
		1269	idle_reify (EV_P)
		1270	{
		1271	if (expect_false (idleall))
		1272	{
		1273	int pri;
		1274
		1275	for (pri = NUMPRI; pri--; )
405	{	1276	{
406	now = get_clock ();	1277	if (pendingcnt [pri])
407	diff = ev_now - now;	1278	break;
408		1279
409	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1280	if (idlecnt [pri])
410	return; /* all is well */	1281	{
411		1282	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
412	ev_now = ev_time ();	1283	break;
		1284	}
413	}	1285	}
		1286	}
		1287	}
		1288	#endif
414		1289
415	/* time jump detected, reschedule atimers */	1290	int inline_size
416	for (i = 0; i < atimercnt; ++i)	1291	time_update_monotonic (EV_P)
		1292	{
		1293	mn_now = get_clock ();
		1294
		1295	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1296	{
		1297	ev_rt_now = rtmn_diff + mn_now;
		1298	return 0;
		1299	}
		1300	else
		1301	{
		1302	now_floor = mn_now;
		1303	ev_rt_now = ev_time ();
		1304	return 1;
		1305	}
		1306	}
		1307
		1308	void inline_size
		1309	time_update (EV_P)
		1310	{
		1311	int i;
		1312
		1313	#if EV_USE_MONOTONIC
		1314	if (expect_true (have_monotonic))
		1315	{
		1316	if (time_update_monotonic (EV_A))
417	{	1317	{
418	struct ev_timer *w = atimers [i];	1318	ev_tstamp odiff = rtmn_diff;
419	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1319
		1320	/* loop a few times, before making important decisions.
		1321	* on the choice of "4": one iteration isn't enough,
		1322	* in case we get preempted during the calls to
		1323	* ev_time and get_clock. a second call is almost guaranteed
		1324	* to succeed in that case, though. and looping a few more times
		1325	* doesn't hurt either as we only do this on time-jumps or
		1326	* in the unlikely event of having been preempted here.
		1327	*/
		1328	for (i = 4; --i; )
		1329	{
		1330	rtmn_diff = ev_rt_now - mn_now;
		1331
		1332	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1333	return; /* all is well */
		1334
		1335	ev_rt_now = ev_time ();
		1336	mn_now = get_clock ();
		1337	now_floor = mn_now;
		1338	}
		1339
		1340	# if EV_PERIODIC_ENABLE
		1341	periodics_reschedule (EV_A);
		1342	# endif
		1343	/* no timer adjustment, as the monotonic clock doesn't jump */
		1344	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
420	}	1345	}
421	}	1346	}
422	else	1347	else
		1348	#endif
423	{	1349	{
424	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1350	ev_rt_now = ev_time ();
425	/* time jump detected, adjust rtimers */	1351
		1352	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		1353	{
		1354	#if EV_PERIODIC_ENABLE
		1355	periodics_reschedule (EV_A);
		1356	#endif
		1357
		1358	/* adjust timers. this is easy, as the offset is the same for all of them */
426	for (i = 0; i < rtimercnt; ++i)	1359	for (i = 0; i < timercnt; ++i)
427	rtimers [i]->at += ev_now - now;	1360	((WT)timers [i])->at += ev_rt_now - mn_now;
		1361	}
428		1362
429	now = ev_now;	1363	mn_now = ev_rt_now;
430	}	1364	}
431	}	1365	}
432		1366
433	int ev_loop_done;	1367	void
		1368	ev_ref (EV_P)
		1369	{
		1370	++activecnt;
		1371	}
434		1372
		1373	void
		1374	ev_unref (EV_P)
		1375	{
		1376	--activecnt;
		1377	}
		1378
		1379	static int loop_done;
		1380
		1381	void
435	void ev_loop (int flags)	1382	ev_loop (EV_P_ int flags)
436	{	1383	{
437	double block;
438	ev_loop_done = flags & EVLOOP_ONESHOT;	1384	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1385	? EVUNLOOP_ONE
		1386	: EVUNLOOP_CANCEL;
		1387
		1388	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
439		1389
440	do	1390	do
441	{	1391	{
		1392	#ifndef _WIN32
		1393	if (expect_false (curpid)) /* penalise the forking check even more */
		1394	if (expect_false (getpid () != curpid))
		1395	{
		1396	curpid = getpid ();
		1397	postfork = 1;
		1398	}
		1399	#endif
		1400
		1401	#if EV_FORK_ENABLE
		1402	/* we might have forked, so queue fork handlers */
		1403	if (expect_false (postfork))
		1404	if (forkcnt)
		1405	{
		1406	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1407	call_pending (EV_A);
		1408	}
		1409	#endif
		1410
		1411	/* queue check watchers (and execute them) */
		1412	if (expect_false (preparecnt))
		1413	{
		1414	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1415	call_pending (EV_A);
		1416	}
		1417
		1418	if (expect_false (!activecnt))
		1419	break;
		1420
		1421	/* we might have forked, so reify kernel state if necessary */
		1422	if (expect_false (postfork))
		1423	loop_fork (EV_A);
		1424
442	/* update fd-related kernel structures */	1425	/* update fd-related kernel structures */
443	fd_reify ();	1426	fd_reify (EV_A);
444		1427
445	/* calculate blocking time */	1428	/* calculate blocking time */
446	if (flags & EVLOOP_NONBLOCK)	1429	{
447	block = 0.;	1430	ev_tstamp block;
		1431
		1432	if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))
		1433	block = 0.; /* do not block at all */
448	else	1434	else
449	{	1435	{
		1436	/* update time to cancel out callback processing overhead */
		1437	#if EV_USE_MONOTONIC
		1438	if (expect_true (have_monotonic))
		1439	time_update_monotonic (EV_A);
		1440	else
		1441	#endif
		1442	{
		1443	ev_rt_now = ev_time ();
		1444	mn_now = ev_rt_now;
		1445	}
		1446
450	block = MAX_BLOCKTIME;	1447	block = MAX_BLOCKTIME;
451		1448
452	if (rtimercnt)	1449	if (timercnt)
453	{	1450	{
454	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1451	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
455	if (block > to) block = to;	1452	if (block > to) block = to;
456	}	1453	}
457		1454
		1455	#if EV_PERIODIC_ENABLE
458	if (atimercnt)	1456	if (periodiccnt)
459	{	1457	{
460	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1458	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
461	if (block > to) block = to;	1459	if (block > to) block = to;
462	}	1460	}
		1461	#endif
463		1462
464	if (block < 0.) block = 0.;	1463	if (expect_false (block < 0.)) block = 0.;
465	}	1464	}
466		1465
467	method_poll (block);	1466	++loop_count;
		1467	backend_poll (EV_A_ block);
		1468	}
468		1469
469	/* update ev_now, do magic */	1470	/* update ev_rt_now, do magic */
470	time_update ();	1471	time_update (EV_A);
471		1472
472	/* put pending timers into pendign queue and reschedule them */	1473	/* queue pending timers and reschedule them */
473	/* absolute timers first */	1474	timers_reify (EV_A); /* relative timers called last */
474	timers_reify (atimers, atimercnt, ev_now);	1475	#if EV_PERIODIC_ENABLE
475	/* relative timers second */	1476	periodics_reify (EV_A); /* absolute timers called first */
476	timers_reify (rtimers, rtimercnt, now);	1477	#endif
477		1478
		1479	#if EV_IDLE_ENABLE
		1480	/* queue idle watchers unless other events are pending */
		1481	idle_reify (EV_A);
		1482	#endif
		1483
		1484	/* queue check watchers, to be executed first */
		1485	if (expect_false (checkcnt))
		1486	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1487
478	call_pending ();	1488	call_pending (EV_A);
479	}
480	while (!ev_loop_done);
481	}
482		1489
483	static void	1490	}
484	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1491	while (expect_true (activecnt && !loop_done));
		1492
		1493	if (loop_done == EVUNLOOP_ONE)
		1494	loop_done = EVUNLOOP_CANCEL;
		1495	}
		1496
		1497	void
		1498	ev_unloop (EV_P_ int how)
		1499	{
		1500	loop_done = how;
		1501	}
		1502
		1503	/*****************************************************************************/
		1504
		1505	void inline_size
		1506	wlist_add (WL *head, WL elem)
485	{	1507	{
486	elem->next = *head;	1508	elem->next = *head;
487	*head = elem;	1509	*head = elem;
488	}	1510	}
489		1511
490	static void	1512	void inline_size
491	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1513	wlist_del (WL *head, WL elem)
492	{	1514	{
493	while (*head)	1515	while (*head)
494	{	1516	{
495	if (*head == elem)	1517	if (*head == elem)
496	{	1518	{
…		…
500		1522
501	head = &(*head)->next;	1523	head = &(*head)->next;
502	}	1524	}
503	}	1525	}
504		1526
505	static void	1527	void inline_speed
506	ev_start (struct ev_watcher *w, int active)	1528	clear_pending (EV_P_ W w)
507	{	1529	{
		1530	if (w->pending)
		1531	{
		1532	pendings [ABSPRI (w)][w->pending - 1].w = 0;
508	w->pending = 0;	1533	w->pending = 0;
		1534	}
		1535	}
		1536
		1537	void
		1538	ev_clear_pending (EV_P_ void *w, int invoke)
		1539	{
		1540	W w_ = (W)w;
		1541	int pending = w_->pending;
		1542
		1543	if (pending)
		1544	{
		1545	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1546
		1547	w_->pending = 0;
		1548	p->w = 0;
		1549
		1550	if (invoke)
		1551	EV_CB_INVOKE (w_, p->events);
		1552	}
		1553	}
		1554
		1555	void inline_size
		1556	pri_adjust (EV_P_ W w)
		1557	{
		1558	int pri = w->priority;
		1559	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1560	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1561	w->priority = pri;
		1562	}
		1563
		1564	void inline_speed
		1565	ev_start (EV_P_ W w, int active)
		1566	{
		1567	pri_adjust (EV_A_ w);
509	w->active = active;	1568	w->active = active;
		1569	ev_ref (EV_A);
510	}	1570	}
511		1571
512	static void	1572	void inline_size
513	ev_stop (struct ev_watcher *w)	1573	ev_stop (EV_P_ W w)
514	{	1574	{
515	if (w->pending)	1575	ev_unref (EV_A);
516	pendings [w->pending - 1].w = 0;
517
518	w->active = 0;	1576	w->active = 0;
519	/* nop */
520	}	1577	}
521		1578
		1579	/*****************************************************************************/
		1580
522	void	1581	void
523	evio_start (struct ev_io *w)	1582	ev_io_start (EV_P_ ev_io *w)
		1583	{
		1584	int fd = w->fd;
		1585
		1586	if (expect_false (ev_is_active (w)))
		1587	return;
		1588
		1589	assert (("ev_io_start called with negative fd", fd >= 0));
		1590
		1591	ev_start (EV_A_ (W)w, 1);
		1592	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1593	wlist_add ((WL *)&anfds[fd].head, (WL)w);
		1594
		1595	fd_change (EV_A_ fd);
		1596	}
		1597
		1598	void
		1599	ev_io_stop (EV_P_ ev_io *w)
		1600	{
		1601	clear_pending (EV_A_ (W)w);
		1602	if (expect_false (!ev_is_active (w)))
		1603	return;
		1604
		1605	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1606
		1607	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
		1608	ev_stop (EV_A_ (W)w);
		1609
		1610	fd_change (EV_A_ w->fd);
		1611	}
		1612
		1613	void
		1614	ev_timer_start (EV_P_ ev_timer *w)
		1615	{
		1616	if (expect_false (ev_is_active (w)))
		1617	return;
		1618
		1619	((WT)w)->at += mn_now;
		1620
		1621	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1622
		1623	ev_start (EV_A_ (W)w, ++timercnt);
		1624	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
		1625	timers [timercnt - 1] = w;
		1626	upheap ((WT *)timers, timercnt - 1);
		1627
		1628	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1629	}
		1630
		1631	void
		1632	ev_timer_stop (EV_P_ ev_timer *w)
		1633	{
		1634	clear_pending (EV_A_ (W)w);
		1635	if (expect_false (!ev_is_active (w)))
		1636	return;
		1637
		1638	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1639
		1640	{
		1641	int active = ((W)w)->active;
		1642
		1643	if (expect_true (--active < --timercnt))
		1644	{
		1645	timers [active] = timers [timercnt];
		1646	adjustheap ((WT *)timers, timercnt, active);
		1647	}
		1648	}
		1649
		1650	((WT)w)->at -= mn_now;
		1651
		1652	ev_stop (EV_A_ (W)w);
		1653	}
		1654
		1655	void
		1656	ev_timer_again (EV_P_ ev_timer *w)
524	{	1657	{
525	if (ev_is_active (w))	1658	if (ev_is_active (w))
526	return;
527
528	int fd = w->fd;
529
530	ev_start ((struct ev_watcher *)w, 1);
531	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
532	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
533
534	++fdchangecnt;
535	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
536	fdchanges [fdchangecnt - 1] = fd;
537	}
538
539	void
540	evio_stop (struct ev_io *w)
541	{
542	if (!ev_is_active (w))
543	return;
544
545	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);
546	ev_stop ((struct ev_watcher *)w);
547
548	++fdchangecnt;
549	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
550	fdchanges [fdchangecnt - 1] = w->fd;
551	}
552
553	void
554	evtimer_start (struct ev_timer *w)
555	{
556	if (ev_is_active (w))
557	return;
558
559	if (w->is_abs)
560	{	1659	{
561	/* this formula differs from the one in timer_reify becuse we do not round up */
562	if (w->repeat)	1660	if (w->repeat)
563	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
564
565	ev_start ((struct ev_watcher *)w, ++atimercnt);
566	array_needsize (atimers, atimermax, atimercnt, );
567	atimers [atimercnt - 1] = w;
568	upheap (atimers, atimercnt - 1);
569	}
570	else
571	{
572	w->at += now;
573
574	ev_start ((struct ev_watcher *)w, ++rtimercnt);
575	array_needsize (rtimers, rtimermax, rtimercnt, );
576	rtimers [rtimercnt - 1] = w;
577	upheap (rtimers, rtimercnt - 1);
578	}
579
580	}
581
582	void
583	evtimer_stop (struct ev_timer *w)
584	{
585	if (!ev_is_active (w))
586	return;
587
588	if (w->is_abs)
589	{
590	if (w->active < atimercnt--)
591	{	1661	{
592	atimers [w->active - 1] = atimers [atimercnt];	1662	((WT)w)->at = mn_now + w->repeat;
593	downheap (atimers, atimercnt, w->active - 1);	1663	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
594	}	1664	}
595	}
596	else	1665	else
		1666	ev_timer_stop (EV_A_ w);
597	{	1667	}
598	if (w->active < rtimercnt--)	1668	else if (w->repeat)
		1669	{
		1670	w->at = w->repeat;
		1671	ev_timer_start (EV_A_ w);
		1672	}
		1673	}
		1674
		1675	#if EV_PERIODIC_ENABLE
		1676	void
		1677	ev_periodic_start (EV_P_ ev_periodic *w)
		1678	{
		1679	if (expect_false (ev_is_active (w)))
		1680	return;
		1681
		1682	if (w->reschedule_cb)
		1683	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1684	else if (w->interval)
		1685	{
		1686	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1687	/* this formula differs from the one in periodic_reify because we do not always round up */
		1688	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1689	}
		1690
		1691	ev_start (EV_A_ (W)w, ++periodiccnt);
		1692	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
		1693	periodics [periodiccnt - 1] = w;
		1694	upheap ((WT *)periodics, periodiccnt - 1);
		1695
		1696	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1697	}
		1698
		1699	void
		1700	ev_periodic_stop (EV_P_ ev_periodic *w)
		1701	{
		1702	clear_pending (EV_A_ (W)w);
		1703	if (expect_false (!ev_is_active (w)))
		1704	return;
		1705
		1706	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1707
		1708	{
		1709	int active = ((W)w)->active;
		1710
		1711	if (expect_true (--active < --periodiccnt))
599	{	1712	{
600	rtimers [w->active - 1] = rtimers [rtimercnt];	1713	periodics [active] = periodics [periodiccnt];
601	downheap (rtimers, rtimercnt, w->active - 1);	1714	adjustheap ((WT *)periodics, periodiccnt, active);
602	}	1715	}
603	}	1716	}
604		1717
605	ev_stop ((struct ev_watcher *)w);	1718	ev_stop (EV_A_ (W)w);
606	}	1719	}
607		1720
608	void	1721	void
		1722	ev_periodic_again (EV_P_ ev_periodic *w)
		1723	{
		1724	/* TODO: use adjustheap and recalculation */
		1725	ev_periodic_stop (EV_A_ w);
		1726	ev_periodic_start (EV_A_ w);
		1727	}
		1728	#endif
		1729
		1730	#ifndef SA_RESTART
		1731	# define SA_RESTART 0
		1732	#endif
		1733
		1734	void
609	evsignal_start (struct ev_signal *w)	1735	ev_signal_start (EV_P_ ev_signal *w)
610	{	1736	{
		1737	#if EV_MULTIPLICITY
		1738	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1739	#endif
611	if (ev_is_active (w))	1740	if (expect_false (ev_is_active (w)))
612	return;	1741	return;
613		1742
614	ev_start ((struct ev_watcher *)w, 1);	1743	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1744
		1745	ev_start (EV_A_ (W)w, 1);
615	array_needsize (signals, signalmax, w->signum, signals_init);	1746	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
616	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);	1747	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
617		1748
618	if (!w->next)	1749	if (!((WL)w)->next)
619	{	1750	{
		1751	#if _WIN32
		1752	signal (w->signum, sighandler);
		1753	#else
620	struct sigaction sa;	1754	struct sigaction sa;
621	sa.sa_handler = sighandler;	1755	sa.sa_handler = sighandler;
622	sigfillset (&sa.sa_mask);	1756	sigfillset (&sa.sa_mask);
623	sa.sa_flags = 0;	1757	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
624	sigaction (w->signum, &sa, 0);	1758	sigaction (w->signum, &sa, 0);
		1759	#endif
625	}	1760	}
626	}	1761	}
627		1762
628	void	1763	void
629	evsignal_stop (struct ev_signal *w)	1764	ev_signal_stop (EV_P_ ev_signal *w)
630	{	1765	{
		1766	clear_pending (EV_A_ (W)w);
631	if (!ev_is_active (w))	1767	if (expect_false (!ev_is_active (w)))
632	return;	1768	return;
633		1769
634	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);	1770	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
635	ev_stop ((struct ev_watcher *)w);	1771	ev_stop (EV_A_ (W)w);
636		1772
637	if (!signals [w->signum - 1].head)	1773	if (!signals [w->signum - 1].head)
638	signal (w->signum, SIG_DFL);	1774	signal (w->signum, SIG_DFL);
639	}	1775	}
640		1776
		1777	void
		1778	ev_child_start (EV_P_ ev_child *w)
		1779	{
		1780	#if EV_MULTIPLICITY
		1781	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1782	#endif
		1783	if (expect_false (ev_is_active (w)))
		1784	return;
		1785
		1786	ev_start (EV_A_ (W)w, 1);
		1787	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1788	}
		1789
		1790	void
		1791	ev_child_stop (EV_P_ ev_child *w)
		1792	{
		1793	clear_pending (EV_A_ (W)w);
		1794	if (expect_false (!ev_is_active (w)))
		1795	return;
		1796
		1797	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1798	ev_stop (EV_A_ (W)w);
		1799	}
		1800
		1801	#if EV_STAT_ENABLE
		1802
		1803	# ifdef _WIN32
		1804	# undef lstat
		1805	# define lstat(a,b) _stati64 (a,b)
		1806	# endif
		1807
		1808	#define DEF_STAT_INTERVAL 5.0074891
		1809	#define MIN_STAT_INTERVAL 0.1074891
		1810
		1811	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1812
		1813	#if EV_USE_INOTIFY
		1814	# define EV_INOTIFY_BUFSIZE 8192
		1815
		1816	static void noinline
		1817	infy_add (EV_P_ ev_stat *w)
		1818	{
		1819	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);
		1820
		1821	if (w->wd < 0)
		1822	{
		1823	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1824
		1825	/* monitor some parent directory for speedup hints */
		1826	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1827	{
		1828	char path [4096];
		1829	strcpy (path, w->path);
		1830
		1831	do
		1832	{
		1833	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1834	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1835
		1836	char *pend = strrchr (path, '/');
		1837
		1838	if (!pend)
		1839	break; /* whoops, no '/', complain to your admin */
		1840
		1841	*pend = 0;
		1842	w->wd = inotify_add_watch (fs_fd, path, mask);
		1843	}
		1844	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1845	}
		1846	}
		1847	else
		1848	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1849
		1850	if (w->wd >= 0)
		1851	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1852	}
		1853
		1854	static void noinline
		1855	infy_del (EV_P_ ev_stat *w)
		1856	{
		1857	int slot;
		1858	int wd = w->wd;
		1859
		1860	if (wd < 0)
		1861	return;
		1862
		1863	w->wd = -2;
		1864	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1865	wlist_del (&fs_hash [slot].head, (WL)w);
		1866
		1867	/* remove this watcher, if others are watching it, they will rearm */
		1868	inotify_rm_watch (fs_fd, wd);
		1869	}
		1870
		1871	static void noinline
		1872	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1873	{
		1874	if (slot < 0)
		1875	/* overflow, need to check for all hahs slots */
		1876	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1877	infy_wd (EV_A_ slot, wd, ev);
		1878	else
		1879	{
		1880	WL w_;
		1881
		1882	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1883	{
		1884	ev_stat *w = (ev_stat *)w_;
		1885	w_ = w_->next; /* lets us remove this watcher and all before it */
		1886
		1887	if (w->wd == wd || wd == -1)
		1888	{
		1889	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		1890	{
		1891	w->wd = -1;
		1892	infy_add (EV_A_ w); /* re-add, no matter what */
		1893	}
		1894
		1895	stat_timer_cb (EV_A_ &w->timer, 0);
		1896	}
		1897	}
		1898	}
		1899	}
		1900
		1901	static void
		1902	infy_cb (EV_P_ ev_io *w, int revents)
		1903	{
		1904	char buf [EV_INOTIFY_BUFSIZE];
		1905	struct inotify_event *ev = (struct inotify_event *)buf;
		1906	int ofs;
		1907	int len = read (fs_fd, buf, sizeof (buf));
		1908
		1909	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1910	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1911	}
		1912
		1913	void inline_size
		1914	infy_init (EV_P)
		1915	{
		1916	if (fs_fd != -2)
		1917	return;
		1918
		1919	fs_fd = inotify_init ();
		1920
		1921	if (fs_fd >= 0)
		1922	{
		1923	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1924	ev_set_priority (&fs_w, EV_MAXPRI);
		1925	ev_io_start (EV_A_ &fs_w);
		1926	}
		1927	}
		1928
		1929	void inline_size
		1930	infy_fork (EV_P)
		1931	{
		1932	int slot;
		1933
		1934	if (fs_fd < 0)
		1935	return;
		1936
		1937	close (fs_fd);
		1938	fs_fd = inotify_init ();
		1939
		1940	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1941	{
		1942	WL w_ = fs_hash [slot].head;
		1943	fs_hash [slot].head = 0;
		1944
		1945	while (w_)
		1946	{
		1947	ev_stat *w = (ev_stat *)w_;
		1948	w_ = w_->next; /* lets us add this watcher */
		1949
		1950	w->wd = -1;
		1951
		1952	if (fs_fd >= 0)
		1953	infy_add (EV_A_ w); /* re-add, no matter what */
		1954	else
		1955	ev_timer_start (EV_A_ &w->timer);
		1956	}
		1957
		1958	}
		1959	}
		1960
		1961	#endif
		1962
		1963	void
		1964	ev_stat_stat (EV_P_ ev_stat *w)
		1965	{
		1966	if (lstat (w->path, &w->attr) < 0)
		1967	w->attr.st_nlink = 0;
		1968	else if (!w->attr.st_nlink)
		1969	w->attr.st_nlink = 1;
		1970	}
		1971
		1972	static void noinline
		1973	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1974	{
		1975	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		1976
		1977	/* we copy this here each the time so that */
		1978	/* prev has the old value when the callback gets invoked */
		1979	w->prev = w->attr;
		1980	ev_stat_stat (EV_A_ w);
		1981
		1982	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		1983	if (
		1984	w->prev.st_dev != w->attr.st_dev
		1985	|| w->prev.st_ino != w->attr.st_ino
		1986	|| w->prev.st_mode != w->attr.st_mode
		1987	|| w->prev.st_nlink != w->attr.st_nlink
		1988	|| w->prev.st_uid != w->attr.st_uid
		1989	|| w->prev.st_gid != w->attr.st_gid
		1990	|| w->prev.st_rdev != w->attr.st_rdev
		1991	|| w->prev.st_size != w->attr.st_size
		1992	|| w->prev.st_atime != w->attr.st_atime
		1993	|| w->prev.st_mtime != w->attr.st_mtime
		1994	|| w->prev.st_ctime != w->attr.st_ctime
		1995	) {
		1996	#if EV_USE_INOTIFY
		1997	infy_del (EV_A_ w);
		1998	infy_add (EV_A_ w);
		1999	ev_stat_stat (EV_A_ w); /* avoid race... */
		2000	#endif
		2001
		2002	ev_feed_event (EV_A_ w, EV_STAT);
		2003	}
		2004	}
		2005
		2006	void
		2007	ev_stat_start (EV_P_ ev_stat *w)
		2008	{
		2009	if (expect_false (ev_is_active (w)))
		2010	return;
		2011
		2012	/* since we use memcmp, we need to clear any padding data etc. */
		2013	memset (&w->prev, 0, sizeof (ev_statdata));
		2014	memset (&w->attr, 0, sizeof (ev_statdata));
		2015
		2016	ev_stat_stat (EV_A_ w);
		2017
		2018	if (w->interval < MIN_STAT_INTERVAL)
		2019	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2020
		2021	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2022	ev_set_priority (&w->timer, ev_priority (w));
		2023
		2024	#if EV_USE_INOTIFY
		2025	infy_init (EV_A);
		2026
		2027	if (fs_fd >= 0)
		2028	infy_add (EV_A_ w);
		2029	else
		2030	#endif
		2031	ev_timer_start (EV_A_ &w->timer);
		2032
		2033	ev_start (EV_A_ (W)w, 1);
		2034	}
		2035
		2036	void
		2037	ev_stat_stop (EV_P_ ev_stat *w)
		2038	{
		2039	clear_pending (EV_A_ (W)w);
		2040	if (expect_false (!ev_is_active (w)))
		2041	return;
		2042
		2043	#if EV_USE_INOTIFY
		2044	infy_del (EV_A_ w);
		2045	#endif
		2046	ev_timer_stop (EV_A_ &w->timer);
		2047
		2048	ev_stop (EV_A_ (W)w);
		2049	}
		2050	#endif
		2051
		2052	#if EV_IDLE_ENABLE
		2053	void
		2054	ev_idle_start (EV_P_ ev_idle *w)
		2055	{
		2056	if (expect_false (ev_is_active (w)))
		2057	return;
		2058
		2059	pri_adjust (EV_A_ (W)w);
		2060
		2061	{
		2062	int active = ++idlecnt [ABSPRI (w)];
		2063
		2064	++idleall;
		2065	ev_start (EV_A_ (W)w, active);
		2066
		2067	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2068	idles [ABSPRI (w)][active - 1] = w;
		2069	}
		2070	}
		2071
		2072	void
		2073	ev_idle_stop (EV_P_ ev_idle *w)
		2074	{
		2075	clear_pending (EV_A_ (W)w);
		2076	if (expect_false (!ev_is_active (w)))
		2077	return;
		2078
		2079	{
		2080	int active = ((W)w)->active;
		2081
		2082	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2083	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2084
		2085	ev_stop (EV_A_ (W)w);
		2086	--idleall;
		2087	}
		2088	}
		2089	#endif
		2090
		2091	void
		2092	ev_prepare_start (EV_P_ ev_prepare *w)
		2093	{
		2094	if (expect_false (ev_is_active (w)))
		2095	return;
		2096
		2097	ev_start (EV_A_ (W)w, ++preparecnt);
		2098	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2099	prepares [preparecnt - 1] = w;
		2100	}
		2101
		2102	void
		2103	ev_prepare_stop (EV_P_ ev_prepare *w)
		2104	{
		2105	clear_pending (EV_A_ (W)w);
		2106	if (expect_false (!ev_is_active (w)))
		2107	return;
		2108
		2109	{
		2110	int active = ((W)w)->active;
		2111	prepares [active - 1] = prepares [--preparecnt];
		2112	((W)prepares [active - 1])->active = active;
		2113	}
		2114
		2115	ev_stop (EV_A_ (W)w);
		2116	}
		2117
		2118	void
		2119	ev_check_start (EV_P_ ev_check *w)
		2120	{
		2121	if (expect_false (ev_is_active (w)))
		2122	return;
		2123
		2124	ev_start (EV_A_ (W)w, ++checkcnt);
		2125	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2126	checks [checkcnt - 1] = w;
		2127	}
		2128
		2129	void
		2130	ev_check_stop (EV_P_ ev_check *w)
		2131	{
		2132	clear_pending (EV_A_ (W)w);
		2133	if (expect_false (!ev_is_active (w)))
		2134	return;
		2135
		2136	{
		2137	int active = ((W)w)->active;
		2138	checks [active - 1] = checks [--checkcnt];
		2139	((W)checks [active - 1])->active = active;
		2140	}
		2141
		2142	ev_stop (EV_A_ (W)w);
		2143	}
		2144
		2145	#if EV_EMBED_ENABLE
		2146	void noinline
		2147	ev_embed_sweep (EV_P_ ev_embed *w)
		2148	{
		2149	ev_loop (w->loop, EVLOOP_NONBLOCK);
		2150	}
		2151
		2152	static void
		2153	embed_cb (EV_P_ ev_io *io, int revents)
		2154	{
		2155	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2156
		2157	if (ev_cb (w))
		2158	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2159	else
		2160	ev_embed_sweep (loop, w);
		2161	}
		2162
		2163	void
		2164	ev_embed_start (EV_P_ ev_embed *w)
		2165	{
		2166	if (expect_false (ev_is_active (w)))
		2167	return;
		2168
		2169	{
		2170	struct ev_loop *loop = w->loop;
		2171	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2172	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		2173	}
		2174
		2175	ev_set_priority (&w->io, ev_priority (w));
		2176	ev_io_start (EV_A_ &w->io);
		2177
		2178	ev_start (EV_A_ (W)w, 1);
		2179	}
		2180
		2181	void
		2182	ev_embed_stop (EV_P_ ev_embed *w)
		2183	{
		2184	clear_pending (EV_A_ (W)w);
		2185	if (expect_false (!ev_is_active (w)))
		2186	return;
		2187
		2188	ev_io_stop (EV_A_ &w->io);
		2189
		2190	ev_stop (EV_A_ (W)w);
		2191	}
		2192	#endif
		2193
		2194	#if EV_FORK_ENABLE
		2195	void
		2196	ev_fork_start (EV_P_ ev_fork *w)
		2197	{
		2198	if (expect_false (ev_is_active (w)))
		2199	return;
		2200
		2201	ev_start (EV_A_ (W)w, ++forkcnt);
		2202	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2203	forks [forkcnt - 1] = w;
		2204	}
		2205
		2206	void
		2207	ev_fork_stop (EV_P_ ev_fork *w)
		2208	{
		2209	clear_pending (EV_A_ (W)w);
		2210	if (expect_false (!ev_is_active (w)))
		2211	return;
		2212
		2213	{
		2214	int active = ((W)w)->active;
		2215	forks [active - 1] = forks [--forkcnt];
		2216	((W)forks [active - 1])->active = active;
		2217	}
		2218
		2219	ev_stop (EV_A_ (W)w);
		2220	}
		2221	#endif
		2222
641	/*****************************************************************************/	2223	/*****************************************************************************/
642	#if 1	2224
		2225	struct ev_once
		2226	{
		2227	ev_io io;
		2228	ev_timer to;
		2229	void (*cb)(int revents, void *arg);
		2230	void *arg;
		2231	};
643		2232
644	static void	2233	static void
645	sin_cb (struct ev_io *w, int revents)	2234	once_cb (EV_P_ struct ev_once *once, int revents)
646	{	2235	{
647	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2236	void (*cb)(int revents, void *arg) = once->cb;
		2237	void *arg = once->arg;
		2238
		2239	ev_io_stop (EV_A_ &once->io);
		2240	ev_timer_stop (EV_A_ &once->to);
		2241	ev_free (once);
		2242
		2243	cb (revents, arg);
648	}	2244	}
649		2245
650	static void	2246	static void
651	ocb (struct ev_timer *w, int revents)	2247	once_cb_io (EV_P_ ev_io *w, int revents)
652	{	2248	{
653	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2249	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
654	evtimer_stop (w);
655	evtimer_start (w);
656	}	2250	}
657		2251
658	static void	2252	static void
659	scb (struct ev_signal *w, int revents)	2253	once_cb_to (EV_P_ ev_timer *w, int revents)
660	{	2254	{
661	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	2255	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
662	}	2256	}
663		2257
664	int main (void)	2258	void
		2259	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
665	{	2260	{
666	struct ev_io sin;	2261	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
667		2262
668	ev_init (0);	2263	if (expect_false (!once))
669
670	evw_init (&sin, sin_cb, 55);
671	evio_set (&sin, 0, EV_READ);
672	evio_start (&sin);
673
674	struct ev_timer t[10000];
675
676	#if 0
677	int i;
678	for (i = 0; i < 10000; ++i)
679	{
680	struct ev_timer *w = t + i;
681	evw_init (w, ocb, i);
682	evtimer_set_abs (w, drand48 (), 0.99775533);
683	evtimer_start (w);
684	if (drand48 () < 0.5)
685	evtimer_stop (w);
686	}	2264	{
687	#endif	2265	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
688
689	struct ev_timer t1;
690	evw_init (&t1, ocb, 0);
691	evtimer_set_abs (&t1, 5, 10);
692	evtimer_start (&t1);
693
694	struct ev_signal sig;
695	evw_init (&sig, scb, 65535);
696	evsignal_set (&sig, SIGQUIT);
697	evsignal_start (&sig);
698
699	ev_loop (0);
700
701	return 0;	2266	return;
702	}	2267	}
703		2268
704	#endif	2269	once->cb = cb;
		2270	once->arg = arg;
705		2271
		2272	ev_init (&once->io, once_cb_io);
		2273	if (fd >= 0)
		2274	{
		2275	ev_io_set (&once->io, fd, events);
		2276	ev_io_start (EV_A_ &once->io);
		2277	}
706		2278
		2279	ev_init (&once->to, once_cb_to);
		2280	if (timeout >= 0.)
		2281	{
		2282	ev_timer_set (&once->to, timeout, 0.);
		2283	ev_timer_start (EV_A_ &once->to);
		2284	}
		2285	}
707		2286
		2287	#ifdef __cplusplus
		2288	}
		2289	#endif
708		2290

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