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Comparing libev/ev.c (file contents):
Revision 1.9 by root, Wed Oct 31 07:24:17 2007 UTC vs.
Revision 1.163 by root, Wed Dec 5 13:54:36 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)->priority - EV_MINPRI)
		247
		248	#define EMPTY0 /* 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);
43	static void (*method_poll)(ev_tstamp timeout);
44		361
45	/*****************************************************************************/	362	/*****************************************************************************/
46		363
47	ev_tstamp	364	ev_tstamp
48	ev_time (void)	365	ev_time (void)
49	{	366	{
50	#if HAVE_REALTIME	367	#if EV_USE_REALTIME
51	struct timespec ts;	368	struct timespec ts;
52	clock_gettime (CLOCK_REALTIME, &ts);	369	clock_gettime (CLOCK_REALTIME, &ts);
53	return ts.tv_sec + ts.tv_nsec * 1e-9;	370	return ts.tv_sec + ts.tv_nsec * 1e-9;
54	#else	371	#else
55	struct timeval tv;	372	struct timeval tv;
56	gettimeofday (&tv, 0);	373	gettimeofday (&tv, 0);
57	return tv.tv_sec + tv.tv_usec * 1e-6;	374	return tv.tv_sec + tv.tv_usec * 1e-6;
58	#endif	375	#endif
59	}	376	}
60		377
61	static ev_tstamp	378	ev_tstamp inline_size
62	get_clock (void)	379	get_clock (void)
63	{	380	{
64	#if HAVE_MONOTONIC	381	#if EV_USE_MONOTONIC
65	if (have_monotonic)	382	if (expect_true (have_monotonic))
66	{	383	{
67	struct timespec ts;	384	struct timespec ts;
68	clock_gettime (CLOCK_MONOTONIC, &ts);	385	clock_gettime (CLOCK_MONOTONIC, &ts);
69	return ts.tv_sec + ts.tv_nsec * 1e-9;	386	return ts.tv_sec + ts.tv_nsec * 1e-9;
70	}	387	}
71	#endif	388	#endif
72		389
73	return ev_time ();	390	return ev_time ();
74	}	391	}
75		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
76	#define array_needsize(base,cur,cnt,init) \	429	#define array_needsize(type,base,cur,cnt,init) \
77	if ((cnt) > cur) \	430	if (expect_false ((cnt) > (cur))) \
78	{ \	431	{ \
79	int newcnt = cur ? cur << 1 : 16; \	432	int ocur_ = (cur); \
80	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	433	(base) = (type *)array_realloc \
81	base = realloc (base, sizeof (*base) * (newcnt)); \	434	(sizeof (type), (base), &(cur), (cnt)); \
82	init (base + cur, newcnt - cur); \	435	init ((base) + (ocur_), (cur) - ocur_); \
83	cur = newcnt; \
84	}	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;
85		450
86	/*****************************************************************************/	451	/*****************************************************************************/
87		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;
		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	/*****************************************************************************/
		675
88	typedef struct	676	typedef struct
89	{	677	{
90	struct ev_io *head;	678	WL head;
91	unsigned char wev, rev; /* want, received event set */
92	} ANFD;
93
94	static ANFD *anfds;
95	static int anfdmax;
96
97	static int *fdchanges;
98	static int fdchangemax, fdchangecnt;
99
100	static void
101	anfds_init (ANFD *base, int count)
102	{
103	while (count--)
104	{
105	base->head = 0;
106	base->wev = base->rev = EV_NONE;
107	++base;
108	}
109	}
110
111	typedef struct
112	{
113	struct ev_watcher *w;
114	int events;
115	} ANPENDING;
116
117	static ANPENDING *pendings;
118	static int pendingmax, pendingcnt;
119
120	static void
121	event (struct ev_watcher *w, int events)
122	{
123	w->pending = ++pendingcnt;
124	array_needsize (pendings, pendingmax, pendingcnt, );
125	pendings [pendingcnt - 1].w = w;
126	pendings [pendingcnt - 1].events = events;
127	}
128
129	static void
130	fd_event (int fd, int events)
131	{
132	ANFD *anfd = anfds + fd;
133	struct ev_io *w;
134
135	for (w = anfd->head; w; w = w->next)
136	{
137	int ev = w->events & events;
138
139	if (ev)
140	event ((struct ev_watcher *)w, ev);
141	}
142	}
143
144	static void
145	queue_events (struct ev_watcher **events, int eventcnt, int type)
146	{
147	int i;
148
149	for (i = 0; i < eventcnt; ++i)
150	event (events [i], type);
151	}
152
153	/*****************************************************************************/
154
155	static struct ev_timer **atimers;
156	static int atimermax, atimercnt;
157
158	static struct ev_timer **rtimers;
159	static int rtimermax, rtimercnt;
160
161	static void
162	upheap (struct ev_timer **timers, int k)
163	{
164	struct ev_timer *w = timers [k];
165
166	while (k && timers [k >> 1]->at > w->at)
167	{
168	timers [k] = timers [k >> 1];
169	timers [k]->active = k + 1;
170	k >>= 1;
171	}
172
173	timers [k] = w;
174	timers [k]->active = k + 1;
175
176	}
177
178	static void
179	downheap (struct ev_timer **timers, int N, int k)
180	{
181	struct ev_timer *w = timers [k];
182
183	while (k < (N >> 1))
184	{
185	int j = k << 1;
186
187	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
188	++j;
189
190	if (w->at <= timers [j]->at)
191	break;
192
193	timers [k] = timers [j];
194	timers [k]->active = k + 1;
195	k = j;
196	}
197
198	timers [k] = w;
199	timers [k]->active = k + 1;
200	}
201
202	/*****************************************************************************/
203
204	typedef struct
205	{
206	struct ev_signal *head;
207	sig_atomic_t gotsig;	679	sig_atomic_t volatile gotsig;
208	} ANSIG;	680	} ANSIG;
209		681
210	static ANSIG *signals;	682	static ANSIG *signals;
211	static int signalmax;	683	static int signalmax;
212		684
213	static int sigpipe [2];	685	static int sigpipe [2];
214	static sig_atomic_t gotsig;	686	static sig_atomic_t volatile gotsig;
215	static struct ev_io sigev;	687	static ev_io sigev;
216		688
217	static void	689	void inline_size
218	signals_init (ANSIG *base, int count)	690	signals_init (ANSIG *base, int count)
219	{	691	{
220	while (count--)	692	while (count--)
221	{	693	{
222	base->head = 0;	694	base->head = 0;
223	base->gotsig = 0;	695	base->gotsig = 0;
		696
224	++base;	697	++base;
225	}	698	}
226	}	699	}
227		700
228	static void	701	static void
229	sighandler (int signum)	702	sighandler (int signum)
230	{	703	{
		704	#if _WIN32
		705	signal (signum, sighandler);
		706	#endif
		707
231	signals [signum - 1].gotsig = 1;	708	signals [signum - 1].gotsig = 1;
232		709
233	if (!gotsig)	710	if (!gotsig)
234	{	711	{
		712	int old_errno = errno;
235	gotsig = 1;	713	gotsig = 1;
236	write (sigpipe [1], &gotsig, 1);	714	write (sigpipe [1], &signum, 1);
		715	errno = old_errno;
237	}	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);
238	}	737	}
239		738
240	static void	739	static void
241	sigcb (struct ev_io *iow, int revents)	740	sigcb (EV_P_ ev_io *iow, int revents)
242	{	741	{
243	struct ev_signal *w;
244	int sig;	742	int signum;
245		743
		744	read (sigpipe [0], &revents, 1);
246	gotsig = 0;	745	gotsig = 0;
247	read (sigpipe [0], &revents, 1);
248		746
249	for (sig = signalmax; sig--; )	747	for (signum = signalmax; signum--; )
250	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)
251	{	790	{
252	signals [sig].gotsig = 0;	791	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
253		792	w->rpid = pid;
254	for (w = signals [sig].head; w; w = w->next)	793	w->rstatus = status;
255	event ((struct ev_watcher *)w, EV_SIGNAL);	794	ev_feed_event (EV_A_ (W)w, EV_CHILD);
256	}	795	}
257	}	796	}
258		797
		798	#ifndef WCONTINUED
		799	# define WCONTINUED 0
		800	#endif
		801
259	static void	802	static void
260	siginit (void)	803	childcb (EV_P_ ev_signal *sw, int revents)
261	{	804	{
262	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	805	int pid, status;
263	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
264		806
265	/* 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) */
266	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	808	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
267	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	809	if (!WCONTINUED
		810	|| errno != EINVAL
		811	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		812	return;
268		813
269	evio_set (&sigev, sigpipe [0], EV_READ);	814	/* make sure we are called again until all childs have been reaped */
270	evio_start (&sigev);	815	/* we need to do it this way so that the callback gets called before we continue */
		816	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		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 */
271	}	821	}
		822
		823	#endif
272		824
273	/*****************************************************************************/	825	/*****************************************************************************/
274		826
275	static struct ev_idle **idles;	827	#if EV_USE_PORT
276	static int idlemax, idlecnt;	828	# include "ev_port.c"
		829	#endif
		830	#if EV_USE_KQUEUE
		831	# include "ev_kqueue.c"
		832	#endif
		833	#if EV_USE_EPOLL
		834	# include "ev_epoll.c"
		835	#endif
		836	#if EV_USE_POLL
		837	# include "ev_poll.c"
		838	#endif
		839	#if EV_USE_SELECT
		840	# include "ev_select.c"
		841	#endif
277		842
278	static struct ev_check **checks;	843	int
279	static int checkmax, checkcnt;	844	ev_version_major (void)
		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	{
		924	#if EV_USE_MONOTONIC
		925	{
		926	struct timespec ts;
		927	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		928	have_monotonic = 1;
		929	}
		930	#endif
		931
		932	ev_rt_now = ev_time ();
		933	mn_now = get_clock ();
		934	now_floor = mn_now;
		935	rtmn_diff = ev_rt_now - mn_now;
		936
		937	/* pid check not overridable via env */
		938	#ifndef _WIN32
		939	if (flags & EVFLAG_FORKCHECK)
		940	curpid = getpid ();
		941	#endif
		942
		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
		963	#if EV_USE_EPOLL
		964	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		965	#endif
		966	#if EV_USE_POLL
		967	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		968	#endif
		969	#if EV_USE_SELECT
		970	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		971	#endif
		972
		973	ev_init (&sigev, sigcb);
		974	ev_set_priority (&sigev, EV_MAXPRI);
		975	}
		976	}
		977
		978	static void noinline
		979	loop_destroy (EV_P)
		980	{
		981	int i;
		982
		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	array_free (pending, [i]);
		1009
		1010	/* have to use the microsoft-never-gets-it-right macro */
		1011	array_free (fdchange, EMPTY0);
		1012	array_free (timer, EMPTY0);
		1013	#if EV_PERIODIC_ENABLE
		1014	array_free (periodic, EMPTY0);
		1015	#endif
		1016	array_free (idle, EMPTY0);
		1017	array_free (prepare, EMPTY0);
		1018	array_free (check, EMPTY0);
		1019
		1020	backend = 0;
		1021	}
		1022
		1023	void inline_size infy_fork (EV_P);
		1024
		1025	void inline_size
		1026	loop_fork (EV_P)
		1027	{
		1028	#if EV_USE_PORT
		1029	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1030	#endif
		1031	#if EV_USE_KQUEUE
		1032	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1033	#endif
		1034	#if EV_USE_EPOLL
		1035	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1036	#endif
		1037	#if EV_USE_INOTIFY
		1038	infy_fork (EV_A);
		1039	#endif
		1040
		1041	if (ev_is_active (&sigev))
		1042	{
		1043	/* default loop */
		1044
		1045	ev_ref (EV_A);
		1046	ev_io_stop (EV_A_ &sigev);
		1047	close (sigpipe [0]);
		1048	close (sigpipe [1]);
		1049
		1050	while (pipe (sigpipe))
		1051	syserr ("(libev) error creating pipe");
		1052
		1053	siginit (EV_A);
		1054	}
		1055
		1056	postfork = 0;
		1057	}
		1058
		1059	#if EV_MULTIPLICITY
		1060	struct ev_loop *
		1061	ev_loop_new (unsigned int flags)
		1062	{
		1063	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1064
		1065	memset (loop, 0, sizeof (struct ev_loop));
		1066
		1067	loop_init (EV_A_ flags);
		1068
		1069	if (ev_backend (EV_A))
		1070	return loop;
		1071
		1072	return 0;
		1073	}
		1074
		1075	void
		1076	ev_loop_destroy (EV_P)
		1077	{
		1078	loop_destroy (EV_A);
		1079	ev_free (loop);
		1080	}
		1081
		1082	void
		1083	ev_loop_fork (EV_P)
		1084	{
		1085	postfork = 1;
		1086	}
		1087
		1088	#endif
		1089
		1090	#if EV_MULTIPLICITY
		1091	struct ev_loop *
		1092	ev_default_loop_init (unsigned int flags)
		1093	#else
		1094	int
		1095	ev_default_loop (unsigned int flags)
		1096	#endif
		1097	{
		1098	if (sigpipe [0] == sigpipe [1])
		1099	if (pipe (sigpipe))
		1100	return 0;
		1101
		1102	if (!ev_default_loop_ptr)
		1103	{
		1104	#if EV_MULTIPLICITY
		1105	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1106	#else
		1107	ev_default_loop_ptr = 1;
		1108	#endif
		1109
		1110	loop_init (EV_A_ flags);
		1111
		1112	if (ev_backend (EV_A))
		1113	{
		1114	siginit (EV_A);
		1115
		1116	#ifndef _WIN32
		1117	ev_signal_init (&childev, childcb, SIGCHLD);
		1118	ev_set_priority (&childev, EV_MAXPRI);
		1119	ev_signal_start (EV_A_ &childev);
		1120	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1121	#endif
		1122	}
		1123	else
		1124	ev_default_loop_ptr = 0;
		1125	}
		1126
		1127	return ev_default_loop_ptr;
		1128	}
		1129
		1130	void
		1131	ev_default_destroy (void)
		1132	{
		1133	#if EV_MULTIPLICITY
		1134	struct ev_loop *loop = ev_default_loop_ptr;
		1135	#endif
		1136
		1137	#ifndef _WIN32
		1138	ev_ref (EV_A); /* child watcher */
		1139	ev_signal_stop (EV_A_ &childev);
		1140	#endif
		1141
		1142	ev_ref (EV_A); /* signal watcher */
		1143	ev_io_stop (EV_A_ &sigev);
		1144
		1145	close (sigpipe [0]); sigpipe [0] = 0;
		1146	close (sigpipe [1]); sigpipe [1] = 0;
		1147
		1148	loop_destroy (EV_A);
		1149	}
		1150
		1151	void
		1152	ev_default_fork (void)
		1153	{
		1154	#if EV_MULTIPLICITY
		1155	struct ev_loop *loop = ev_default_loop_ptr;
		1156	#endif
		1157
		1158	if (backend)
		1159	postfork = 1;
		1160	}
280		1161
281	/*****************************************************************************/	1162	/*****************************************************************************/
282		1163
283	#if HAVE_EPOLL	1164	int inline_size
284	# include "ev_epoll.c"	1165	any_pending (EV_P)
285	#endif
286	#if HAVE_SELECT
287	# include "ev_select.c"
288	#endif
289
290	int ev_init (int flags)
291	{	1166	{
292	#if HAVE_MONOTONIC	1167	int pri;
293	{
294	struct timespec ts;
295	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
296	have_monotonic = 1;
297	}
298	#endif
299		1168
300	ev_now = ev_time ();	1169	for (pri = NUMPRI; pri--; )
301	now = get_clock ();	1170	if (pendingcnt [pri])
302	diff = ev_now - now;	1171	return 1;
303		1172
304	if (pipe (sigpipe))
305	return 0;	1173	return 0;
306
307	ev_method = EVMETHOD_NONE;
308	#if HAVE_EPOLL
309	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
310	#endif
311	#if HAVE_SELECT
312	if (ev_method == EVMETHOD_NONE) select_init (flags);
313	#endif
314
315	if (ev_method)
316	{
317	evw_init (&sigev, sigcb, 0);
318	siginit ();
319	}
320
321	return ev_method;
322	}	1174	}
323		1175
324	/*****************************************************************************/	1176	void inline_speed
325		1177	call_pending (EV_P)
326	void ev_prefork (void)
327	{	1178	{
328	}
329
330	void ev_postfork_parent (void)
331	{
332	}
333
334	void ev_postfork_child (void)
335	{
336	#if HAVE_EPOLL
337	if (ev_method == EVMETHOD_EPOLL)
338	epoll_postfork_child ();
339	#endif
340
341	evio_stop (&sigev);
342	close (sigpipe [0]);
343	close (sigpipe [1]);
344	pipe (sigpipe);
345	siginit ();
346	}
347
348	/*****************************************************************************/
349
350	static void
351	fd_reify (void)
352	{
353	int i;	1179	int pri;
354		1180
355	for (i = 0; i < fdchangecnt; ++i)	1181	for (pri = NUMPRI; pri--; )
		1182	while (pendingcnt [pri])
356	{	1183	{
357	int fd = fdchanges [i];	1184	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
358	ANFD *anfd = anfds + fd;
359	struct ev_io *w;
360		1185
361	int wev = 0;	1186	if (expect_true (p->w))
362
363	for (w = anfd->head; w; w = w->next)
364	wev |= w->events;
365
366	if (anfd->wev != wev)
367	{	1187	{
368	method_modify (fd, anfd->wev, wev);	1188	/*assert (("non-pending watcher on pending list", p->w->pending));*/
369	anfd->wev = wev;
370	}
371	}
372		1189
373	fdchangecnt = 0;
374	}
375
376	static void
377	call_pending ()
378	{
379	int i;
380
381	for (i = 0; i < pendingcnt; ++i)
382	{
383	ANPENDING *p = pendings + i;
384
385	if (p->w)
386	{
387	p->w->pending = 0;	1190	p->w->pending = 0;
388	p->w->cb (p->w, p->events);	1191	EV_CB_INVOKE (p->w, p->events);
389	}	1192	}
390	}	1193	}
391
392	pendingcnt = 0;
393	}	1194	}
394		1195
395	static void	1196	void inline_size
396	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	1197	timers_reify (EV_P)
397	{	1198	{
398	while (timercnt && timers [0]->at <= now)	1199	while (timercnt && ((WT)timers [0])->at <= mn_now)
399	{	1200	{
400	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)));*/
401		1204
402	/* first reschedule or stop timer */	1205	/* first reschedule or stop timer */
403	if (w->repeat)	1206	if (w->repeat)
404	{	1207	{
405	if (w->is_abs)	1208	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
406	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;	1209
407	else
408	w->at = now + w->repeat;	1210	((WT)w)->at += w->repeat;
		1211	if (((WT)w)->at < mn_now)
		1212	((WT)w)->at = mn_now;
409		1213
410	assert (w->at > now);
411
412	downheap (timers, timercnt, 0);	1214	downheap ((WT *)timers, timercnt, 0);
413	}	1215	}
414	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)
415	{	1235	{
416	evtimer_stop (w); /* nonrepeating: stop timer */	1236	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
417	--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);
418	}	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 */
419		1248
420	event ((struct ev_watcher *)w, EV_TIMEOUT);	1249	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
421	}	1250	}
422	}	1251	}
423		1252
424	static void	1253	static void noinline
425	time_update ()	1254	periodics_reschedule (EV_P)
426	{	1255	{
427	int i;	1256	int i;
		1257
		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;
		1267	}
		1268
		1269	/* now rebuild the heap */
		1270	for (i = periodiccnt >> 1; i--; )
		1271	downheap ((WT *)periodics, periodiccnt, i);
		1272	}
		1273	#endif
		1274
		1275	int inline_size
		1276	time_update_monotonic (EV_P)
		1277	{
		1278	mn_now = get_clock ();
		1279
		1280	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1281	{
		1282	ev_rt_now = rtmn_diff + mn_now;
		1283	return 0;
		1284	}
		1285	else
		1286	{
		1287	now_floor = mn_now;
428	ev_now = ev_time ();	1288	ev_rt_now = ev_time ();
429		1289	return 1;
430	if (have_monotonic)
431	{	1290	}
432	ev_tstamp odiff = diff;	1291	}
433		1292
434	/* detecting time jumps is much more difficult */	1293	void inline_size
435	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1294	time_update (EV_P)
		1295	{
		1296	int i;
		1297
		1298	#if EV_USE_MONOTONIC
		1299	if (expect_true (have_monotonic))
		1300	{
		1301	if (time_update_monotonic (EV_A))
436	{	1302	{
437	now = get_clock ();	1303	ev_tstamp odiff = rtmn_diff;
		1304
		1305	/* loop a few times, before making important decisions.
		1306	* on the choice of "4": one iteration isn't enough,
		1307	* in case we get preempted during the calls to
		1308	* ev_time and get_clock. a second call is almost guaranteed
		1309	* to succeed in that case, though. and looping a few more times
		1310	* doesn't hurt either as we only do this on time-jumps or
		1311	* in the unlikely event of having been preempted here.
		1312	*/
		1313	for (i = 4; --i; )
		1314	{
438	diff = ev_now - now;	1315	rtmn_diff = ev_rt_now - mn_now;
439		1316
440	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1317	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
441	return; /* all is well */	1318	return; /* all is well */
442		1319
443	ev_now = ev_time ();	1320	ev_rt_now = ev_time ();
		1321	mn_now = get_clock ();
		1322	now_floor = mn_now;
		1323	}
		1324
		1325	# if EV_PERIODIC_ENABLE
		1326	periodics_reschedule (EV_A);
		1327	# endif
		1328	/* no timer adjustment, as the monotonic clock doesn't jump */
		1329	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
444	}	1330	}
		1331	}
		1332	else
		1333	#endif
		1334	{
		1335	ev_rt_now = ev_time ();
445		1336
446	/* time jump detected, reschedule atimers */	1337	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
447	for (i = 0; i < atimercnt; ++i)
448	{	1338	{
449	struct ev_timer *w = atimers [i];	1339	#if EV_PERIODIC_ENABLE
450	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1340	periodics_reschedule (EV_A);
		1341	#endif
		1342
		1343	/* adjust timers. this is easy, as the offset is the same for all of them */
		1344	for (i = 0; i < timercnt; ++i)
		1345	((WT)timers [i])->at += ev_rt_now - mn_now;
451	}	1346	}
452	}
453	else
454	{
455	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
456	/* time jump detected, adjust rtimers */
457	for (i = 0; i < rtimercnt; ++i)
458	rtimers [i]->at += ev_now - now;
459		1347
460	now = ev_now;	1348	mn_now = ev_rt_now;
461	}
462	}
463
464	int ev_loop_done;
465
466	void ev_loop (int flags)
467	{
468	double block;
469	ev_loop_done = flags & EVLOOP_ONESHOT;
470
471	if (checkcnt)
472	{	1349	}
473	queue_events (checks, checkcnt, EV_CHECK);	1350	}
474	call_pending ();	1351
475	}	1352	void
		1353	ev_ref (EV_P)
		1354	{
		1355	++activecnt;
		1356	}
		1357
		1358	void
		1359	ev_unref (EV_P)
		1360	{
		1361	--activecnt;
		1362	}
		1363
		1364	static int loop_done;
		1365
		1366	void
		1367	ev_loop (EV_P_ int flags)
		1368	{
		1369	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1370	? EVUNLOOP_ONE
		1371	: EVUNLOOP_CANCEL;
		1372
		1373	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
476		1374
477	do	1375	do
478	{	1376	{
		1377	#ifndef _WIN32
		1378	if (expect_false (curpid)) /* penalise the forking check even more */
		1379	if (expect_false (getpid () != curpid))
		1380	{
		1381	curpid = getpid ();
		1382	postfork = 1;
		1383	}
		1384	#endif
		1385
		1386	#if EV_FORK_ENABLE
		1387	/* we might have forked, so queue fork handlers */
		1388	if (expect_false (postfork))
		1389	if (forkcnt)
		1390	{
		1391	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1392	call_pending (EV_A);
		1393	}
		1394	#endif
		1395
		1396	/* queue check watchers (and execute them) */
		1397	if (expect_false (preparecnt))
		1398	{
		1399	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1400	call_pending (EV_A);
		1401	}
		1402
		1403	if (expect_false (!activecnt))
		1404	break;
		1405
		1406	/* we might have forked, so reify kernel state if necessary */
		1407	if (expect_false (postfork))
		1408	loop_fork (EV_A);
		1409
479	/* update fd-related kernel structures */	1410	/* update fd-related kernel structures */
480	fd_reify ();	1411	fd_reify (EV_A);
481		1412
482	/* calculate blocking time */	1413	/* calculate blocking time */
483	if (flags & EVLOOP_NONBLOCK || idlecnt)	1414	{
484	block = 0.;	1415	ev_tstamp block;
		1416
		1417	if (expect_false (flags & EVLOOP_NONBLOCK || idlecnt || !activecnt))
		1418	block = 0.; /* do not block at all */
485	else	1419	else
486	{	1420	{
		1421	/* update time to cancel out callback processing overhead */
		1422	#if EV_USE_MONOTONIC
		1423	if (expect_true (have_monotonic))
		1424	time_update_monotonic (EV_A);
		1425	else
		1426	#endif
		1427	{
		1428	ev_rt_now = ev_time ();
		1429	mn_now = ev_rt_now;
		1430	}
		1431
487	block = MAX_BLOCKTIME;	1432	block = MAX_BLOCKTIME;
488		1433
489	if (rtimercnt)	1434	if (timercnt)
490	{	1435	{
491	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1436	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
492	if (block > to) block = to;	1437	if (block > to) block = to;
493	}	1438	}
494		1439
		1440	#if EV_PERIODIC_ENABLE
495	if (atimercnt)	1441	if (periodiccnt)
496	{	1442	{
497	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1443	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
498	if (block > to) block = to;	1444	if (block > to) block = to;
499	}	1445	}
		1446	#endif
500		1447
501	if (block < 0.) block = 0.;	1448	if (expect_false (block < 0.)) block = 0.;
502	}	1449	}
503		1450
504	method_poll (block);	1451	++loop_count;
		1452	backend_poll (EV_A_ block);
		1453	}
505		1454
506	/* update ev_now, do magic */	1455	/* update ev_rt_now, do magic */
507	time_update ();	1456	time_update (EV_A);
508		1457
509	/* queue pending timers and reschedule them */	1458	/* queue pending timers and reschedule them */
510	/* absolute timers first */	1459	timers_reify (EV_A); /* relative timers called last */
511	timers_reify (atimers, atimercnt, ev_now);	1460	#if EV_PERIODIC_ENABLE
512	/* relative timers second */	1461	periodics_reify (EV_A); /* absolute timers called first */
513	timers_reify (rtimers, rtimercnt, now);	1462	#endif
514		1463
515	/* queue idle watchers unless io or timers are pending */	1464	/* queue idle watchers unless other events are pending */
516	if (!pendingcnt)	1465	if (idlecnt && !any_pending (EV_A))
517	queue_events (idles, idlecnt, EV_IDLE);	1466	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
518		1467
519	/* queue check and possibly idle watchers */	1468	/* queue check watchers, to be executed first */
		1469	if (expect_false (checkcnt))
520	queue_events (checks, checkcnt, EV_CHECK);	1470	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
521		1471
522	call_pending ();	1472	call_pending (EV_A);
		1473
523	}	1474	}
524	while (!ev_loop_done);	1475	while (expect_true (activecnt && !loop_done));
		1476
		1477	if (loop_done == EVUNLOOP_ONE)
		1478	loop_done = EVUNLOOP_CANCEL;
		1479	}
		1480
		1481	void
		1482	ev_unloop (EV_P_ int how)
		1483	{
		1484	loop_done = how;
525	}	1485	}
526		1486
527	/*****************************************************************************/	1487	/*****************************************************************************/
528		1488
529	static void	1489	void inline_size
530	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1490	wlist_add (WL *head, WL elem)
531	{	1491	{
532	elem->next = *head;	1492	elem->next = *head;
533	*head = elem;	1493	*head = elem;
534	}	1494	}
535		1495
536	static void	1496	void inline_size
537	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1497	wlist_del (WL *head, WL elem)
538	{	1498	{
539	while (*head)	1499	while (*head)
540	{	1500	{
541	if (*head == elem)	1501	if (*head == elem)
542	{	1502	{
…		…
546		1506
547	head = &(*head)->next;	1507	head = &(*head)->next;
548	}	1508	}
549	}	1509	}
550		1510
551	static void	1511	void inline_speed
552	ev_start (struct ev_watcher *w, int active)	1512	ev_clear_pending (EV_P_ W w)
553	{	1513	{
		1514	if (w->pending)
		1515	{
		1516	pendings [ABSPRI (w)][w->pending - 1].w = 0;
554	w->pending = 0;	1517	w->pending = 0;
		1518	}
		1519	}
		1520
		1521	void inline_speed
		1522	ev_start (EV_P_ W w, int active)
		1523	{
		1524	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1525	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1526
555	w->active = active;	1527	w->active = active;
		1528	ev_ref (EV_A);
556	}	1529	}
557		1530
558	static void	1531	void inline_size
559	ev_stop (struct ev_watcher *w)	1532	ev_stop (EV_P_ W w)
560	{	1533	{
561	if (w->pending)	1534	ev_unref (EV_A);
562	pendings [w->pending - 1].w = 0;
563
564	w->active = 0;	1535	w->active = 0;
565	/* nop */
566	}	1536	}
567		1537
568	/*****************************************************************************/	1538	/*****************************************************************************/
569		1539
570	void	1540	void
571	evio_start (struct ev_io *w)	1541	ev_io_start (EV_P_ ev_io *w)
		1542	{
		1543	int fd = w->fd;
		1544
		1545	if (expect_false (ev_is_active (w)))
		1546	return;
		1547
		1548	assert (("ev_io_start called with negative fd", fd >= 0));
		1549
		1550	ev_start (EV_A_ (W)w, 1);
		1551	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1552	wlist_add ((WL *)&anfds[fd].head, (WL)w);
		1553
		1554	fd_change (EV_A_ fd);
		1555	}
		1556
		1557	void
		1558	ev_io_stop (EV_P_ ev_io *w)
		1559	{
		1560	ev_clear_pending (EV_A_ (W)w);
		1561	if (expect_false (!ev_is_active (w)))
		1562	return;
		1563
		1564	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1565
		1566	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
		1567	ev_stop (EV_A_ (W)w);
		1568
		1569	fd_change (EV_A_ w->fd);
		1570	}
		1571
		1572	void
		1573	ev_timer_start (EV_P_ ev_timer *w)
		1574	{
		1575	if (expect_false (ev_is_active (w)))
		1576	return;
		1577
		1578	((WT)w)->at += mn_now;
		1579
		1580	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1581
		1582	ev_start (EV_A_ (W)w, ++timercnt);
		1583	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
		1584	timers [timercnt - 1] = w;
		1585	upheap ((WT *)timers, timercnt - 1);
		1586
		1587	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1588	}
		1589
		1590	void
		1591	ev_timer_stop (EV_P_ ev_timer *w)
		1592	{
		1593	ev_clear_pending (EV_A_ (W)w);
		1594	if (expect_false (!ev_is_active (w)))
		1595	return;
		1596
		1597	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1598
		1599	{
		1600	int active = ((W)w)->active;
		1601
		1602	if (expect_true (--active < --timercnt))
		1603	{
		1604	timers [active] = timers [timercnt];
		1605	adjustheap ((WT *)timers, timercnt, active);
		1606	}
		1607	}
		1608
		1609	((WT)w)->at -= mn_now;
		1610
		1611	ev_stop (EV_A_ (W)w);
		1612	}
		1613
		1614	void
		1615	ev_timer_again (EV_P_ ev_timer *w)
572	{	1616	{
573	if (ev_is_active (w))	1617	if (ev_is_active (w))
574	return;
575
576	int fd = w->fd;
577
578	ev_start ((struct ev_watcher *)w, 1);
579	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
580	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
581
582	++fdchangecnt;
583	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
584	fdchanges [fdchangecnt - 1] = fd;
585	}
586
587	void
588	evio_stop (struct ev_io *w)
589	{
590	if (!ev_is_active (w))
591	return;
592
593	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);
594	ev_stop ((struct ev_watcher *)w);
595
596	++fdchangecnt;
597	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
598	fdchanges [fdchangecnt - 1] = w->fd;
599	}
600
601	void
602	evtimer_start (struct ev_timer *w)
603	{
604	if (ev_is_active (w))
605	return;
606
607	if (w->is_abs)
608	{	1618	{
609	/* this formula differs from the one in timer_reify becuse we do not round up */
610	if (w->repeat)	1619	if (w->repeat)
611	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
612
613	ev_start ((struct ev_watcher *)w, ++atimercnt);
614	array_needsize (atimers, atimermax, atimercnt, );
615	atimers [atimercnt - 1] = w;
616	upheap (atimers, atimercnt - 1);
617	}
618	else
619	{
620	w->at += now;
621
622	ev_start ((struct ev_watcher *)w, ++rtimercnt);
623	array_needsize (rtimers, rtimermax, rtimercnt, );
624	rtimers [rtimercnt - 1] = w;
625	upheap (rtimers, rtimercnt - 1);
626	}
627
628	}
629
630	void
631	evtimer_stop (struct ev_timer *w)
632	{
633	if (!ev_is_active (w))
634	return;
635
636	if (w->is_abs)
637	{
638	if (w->active < atimercnt--)
639	{	1620	{
640	atimers [w->active - 1] = atimers [atimercnt];	1621	((WT)w)->at = mn_now + w->repeat;
641	downheap (atimers, atimercnt, w->active - 1);	1622	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
642	}	1623	}
643	}
644	else	1624	else
		1625	ev_timer_stop (EV_A_ w);
645	{	1626	}
646	if (w->active < rtimercnt--)	1627	else if (w->repeat)
		1628	{
		1629	w->at = w->repeat;
		1630	ev_timer_start (EV_A_ w);
		1631	}
		1632	}
		1633
		1634	#if EV_PERIODIC_ENABLE
		1635	void
		1636	ev_periodic_start (EV_P_ ev_periodic *w)
		1637	{
		1638	if (expect_false (ev_is_active (w)))
		1639	return;
		1640
		1641	if (w->reschedule_cb)
		1642	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1643	else if (w->interval)
		1644	{
		1645	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1646	/* this formula differs from the one in periodic_reify because we do not always round up */
		1647	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1648	}
		1649
		1650	ev_start (EV_A_ (W)w, ++periodiccnt);
		1651	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
		1652	periodics [periodiccnt - 1] = w;
		1653	upheap ((WT *)periodics, periodiccnt - 1);
		1654
		1655	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1656	}
		1657
		1658	void
		1659	ev_periodic_stop (EV_P_ ev_periodic *w)
		1660	{
		1661	ev_clear_pending (EV_A_ (W)w);
		1662	if (expect_false (!ev_is_active (w)))
		1663	return;
		1664
		1665	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1666
		1667	{
		1668	int active = ((W)w)->active;
		1669
		1670	if (expect_true (--active < --periodiccnt))
647	{	1671	{
648	rtimers [w->active - 1] = rtimers [rtimercnt];	1672	periodics [active] = periodics [periodiccnt];
649	downheap (rtimers, rtimercnt, w->active - 1);	1673	adjustheap ((WT *)periodics, periodiccnt, active);
650	}	1674	}
651	}	1675	}
652		1676
653	ev_stop ((struct ev_watcher *)w);	1677	ev_stop (EV_A_ (W)w);
654	}	1678	}
655		1679
656	void	1680	void
		1681	ev_periodic_again (EV_P_ ev_periodic *w)
		1682	{
		1683	/* TODO: use adjustheap and recalculation */
		1684	ev_periodic_stop (EV_A_ w);
		1685	ev_periodic_start (EV_A_ w);
		1686	}
		1687	#endif
		1688
		1689	#ifndef SA_RESTART
		1690	# define SA_RESTART 0
		1691	#endif
		1692
		1693	void
657	evsignal_start (struct ev_signal *w)	1694	ev_signal_start (EV_P_ ev_signal *w)
658	{	1695	{
		1696	#if EV_MULTIPLICITY
		1697	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1698	#endif
659	if (ev_is_active (w))	1699	if (expect_false (ev_is_active (w)))
660	return;	1700	return;
661		1701
662	ev_start ((struct ev_watcher *)w, 1);	1702	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1703
		1704	ev_start (EV_A_ (W)w, 1);
663	array_needsize (signals, signalmax, w->signum, signals_init);	1705	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
664	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);	1706	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
665		1707
666	if (!w->next)	1708	if (!((WL)w)->next)
667	{	1709	{
		1710	#if _WIN32
		1711	signal (w->signum, sighandler);
		1712	#else
668	struct sigaction sa;	1713	struct sigaction sa;
669	sa.sa_handler = sighandler;	1714	sa.sa_handler = sighandler;
670	sigfillset (&sa.sa_mask);	1715	sigfillset (&sa.sa_mask);
671	sa.sa_flags = 0;	1716	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
672	sigaction (w->signum, &sa, 0);	1717	sigaction (w->signum, &sa, 0);
		1718	#endif
673	}	1719	}
674	}	1720	}
675		1721
676	void	1722	void
677	evsignal_stop (struct ev_signal *w)	1723	ev_signal_stop (EV_P_ ev_signal *w)
678	{	1724	{
		1725	ev_clear_pending (EV_A_ (W)w);
679	if (!ev_is_active (w))	1726	if (expect_false (!ev_is_active (w)))
680	return;	1727	return;
681		1728
682	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);	1729	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
683	ev_stop ((struct ev_watcher *)w);	1730	ev_stop (EV_A_ (W)w);
684		1731
685	if (!signals [w->signum - 1].head)	1732	if (!signals [w->signum - 1].head)
686	signal (w->signum, SIG_DFL);	1733	signal (w->signum, SIG_DFL);
687	}	1734	}
688		1735
689	void evidle_start (struct ev_idle *w)	1736	void
		1737	ev_child_start (EV_P_ ev_child *w)
690	{	1738	{
		1739	#if EV_MULTIPLICITY
		1740	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1741	#endif
691	if (ev_is_active (w))	1742	if (expect_false (ev_is_active (w)))
692	return;	1743	return;
693		1744
694	ev_start ((struct ev_watcher *)w, ++idlecnt);	1745	ev_start (EV_A_ (W)w, 1);
		1746	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1747	}
		1748
		1749	void
		1750	ev_child_stop (EV_P_ ev_child *w)
		1751	{
		1752	ev_clear_pending (EV_A_ (W)w);
		1753	if (expect_false (!ev_is_active (w)))
		1754	return;
		1755
		1756	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1757	ev_stop (EV_A_ (W)w);
		1758	}
		1759
		1760	#if EV_STAT_ENABLE
		1761
		1762	# ifdef _WIN32
		1763	# undef lstat
		1764	# define lstat(a,b) _stati64 (a,b)
		1765	# endif
		1766
		1767	#define DEF_STAT_INTERVAL 5.0074891
		1768	#define MIN_STAT_INTERVAL 0.1074891
		1769
		1770	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1771
		1772	#if EV_USE_INOTIFY
		1773	# define EV_INOTIFY_BUFSIZE 8192
		1774
		1775	static void noinline
		1776	infy_add (EV_P_ ev_stat *w)
		1777	{
		1778	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);
		1779
		1780	if (w->wd < 0)
		1781	{
		1782	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1783
		1784	/* monitor some parent directory for speedup hints */
		1785	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1786	{
		1787	char path [4096];
		1788	strcpy (path, w->path);
		1789
		1790	do
		1791	{
		1792	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1793	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1794
		1795	char *pend = strrchr (path, '/');
		1796
		1797	if (!pend)
		1798	break; /* whoops, no '/', complain to your admin */
		1799
		1800	*pend = 0;
		1801	w->wd = inotify_add_watch (fs_fd, path, mask);
		1802	}
		1803	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1804	}
		1805	}
		1806	else
		1807	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1808
		1809	if (w->wd >= 0)
		1810	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1811	}
		1812
		1813	static void noinline
		1814	infy_del (EV_P_ ev_stat *w)
		1815	{
		1816	int slot;
		1817	int wd = w->wd;
		1818
		1819	if (wd < 0)
		1820	return;
		1821
		1822	w->wd = -2;
		1823	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1824	wlist_del (&fs_hash [slot].head, (WL)w);
		1825
		1826	/* remove this watcher, if others are watching it, they will rearm */
		1827	inotify_rm_watch (fs_fd, wd);
		1828	}
		1829
		1830	static void noinline
		1831	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1832	{
		1833	if (slot < 0)
		1834	/* overflow, need to check for all hahs slots */
		1835	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1836	infy_wd (EV_A_ slot, wd, ev);
		1837	else
		1838	{
		1839	WL w_;
		1840
		1841	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1842	{
		1843	ev_stat *w = (ev_stat *)w_;
		1844	w_ = w_->next; /* lets us remove this watcher and all before it */
		1845
		1846	if (w->wd == wd || wd == -1)
		1847	{
		1848	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		1849	{
		1850	w->wd = -1;
		1851	infy_add (EV_A_ w); /* re-add, no matter what */
		1852	}
		1853
		1854	stat_timer_cb (EV_A_ &w->timer, 0);
		1855	}
		1856	}
		1857	}
		1858	}
		1859
		1860	static void
		1861	infy_cb (EV_P_ ev_io *w, int revents)
		1862	{
		1863	char buf [EV_INOTIFY_BUFSIZE];
		1864	struct inotify_event *ev = (struct inotify_event *)buf;
		1865	int ofs;
		1866	int len = read (fs_fd, buf, sizeof (buf));
		1867
		1868	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1869	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1870	}
		1871
		1872	void inline_size
		1873	infy_init (EV_P)
		1874	{
		1875	if (fs_fd != -2)
		1876	return;
		1877
		1878	fs_fd = inotify_init ();
		1879
		1880	if (fs_fd >= 0)
		1881	{
		1882	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1883	ev_set_priority (&fs_w, EV_MAXPRI);
		1884	ev_io_start (EV_A_ &fs_w);
		1885	}
		1886	}
		1887
		1888	void inline_size
		1889	infy_fork (EV_P)
		1890	{
		1891	int slot;
		1892
		1893	if (fs_fd < 0)
		1894	return;
		1895
		1896	close (fs_fd);
		1897	fs_fd = inotify_init ();
		1898
		1899	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1900	{
		1901	WL w_ = fs_hash [slot].head;
		1902	fs_hash [slot].head = 0;
		1903
		1904	while (w_)
		1905	{
		1906	ev_stat *w = (ev_stat *)w_;
		1907	w_ = w_->next; /* lets us add this watcher */
		1908
		1909	w->wd = -1;
		1910
		1911	if (fs_fd >= 0)
		1912	infy_add (EV_A_ w); /* re-add, no matter what */
		1913	else
		1914	ev_timer_start (EV_A_ &w->timer);
		1915	}
		1916
		1917	}
		1918	}
		1919
		1920	#endif
		1921
		1922	void
		1923	ev_stat_stat (EV_P_ ev_stat *w)
		1924	{
		1925	if (lstat (w->path, &w->attr) < 0)
		1926	w->attr.st_nlink = 0;
		1927	else if (!w->attr.st_nlink)
		1928	w->attr.st_nlink = 1;
		1929	}
		1930
		1931	static void noinline
		1932	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1933	{
		1934	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		1935
		1936	/* we copy this here each the time so that */
		1937	/* prev has the old value when the callback gets invoked */
		1938	w->prev = w->attr;
		1939	ev_stat_stat (EV_A_ w);
		1940
		1941	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		1942	if (
		1943	w->prev.st_dev != w->attr.st_dev
		1944	|| w->prev.st_ino != w->attr.st_ino
		1945	|| w->prev.st_mode != w->attr.st_mode
		1946	|| w->prev.st_nlink != w->attr.st_nlink
		1947	|| w->prev.st_uid != w->attr.st_uid
		1948	|| w->prev.st_gid != w->attr.st_gid
		1949	|| w->prev.st_rdev != w->attr.st_rdev
		1950	|| w->prev.st_size != w->attr.st_size
		1951	|| w->prev.st_atime != w->attr.st_atime
		1952	|| w->prev.st_mtime != w->attr.st_mtime
		1953	|| w->prev.st_ctime != w->attr.st_ctime
		1954	) {
		1955	#if EV_USE_INOTIFY
		1956	infy_del (EV_A_ w);
		1957	infy_add (EV_A_ w);
		1958	ev_stat_stat (EV_A_ w); /* avoid race... */
		1959	#endif
		1960
		1961	ev_feed_event (EV_A_ w, EV_STAT);
		1962	}
		1963	}
		1964
		1965	void
		1966	ev_stat_start (EV_P_ ev_stat *w)
		1967	{
		1968	if (expect_false (ev_is_active (w)))
		1969	return;
		1970
		1971	/* since we use memcmp, we need to clear any padding data etc. */
		1972	memset (&w->prev, 0, sizeof (ev_statdata));
		1973	memset (&w->attr, 0, sizeof (ev_statdata));
		1974
		1975	ev_stat_stat (EV_A_ w);
		1976
		1977	if (w->interval < MIN_STAT_INTERVAL)
		1978	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		1979
		1980	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		1981	ev_set_priority (&w->timer, ev_priority (w));
		1982
		1983	#if EV_USE_INOTIFY
		1984	infy_init (EV_A);
		1985
		1986	if (fs_fd >= 0)
		1987	infy_add (EV_A_ w);
		1988	else
		1989	#endif
		1990	ev_timer_start (EV_A_ &w->timer);
		1991
		1992	ev_start (EV_A_ (W)w, 1);
		1993	}
		1994
		1995	void
		1996	ev_stat_stop (EV_P_ ev_stat *w)
		1997	{
		1998	ev_clear_pending (EV_A_ (W)w);
		1999	if (expect_false (!ev_is_active (w)))
		2000	return;
		2001
		2002	#if EV_USE_INOTIFY
		2003	infy_del (EV_A_ w);
		2004	#endif
		2005	ev_timer_stop (EV_A_ &w->timer);
		2006
		2007	ev_stop (EV_A_ (W)w);
		2008	}
		2009	#endif
		2010
		2011	void
		2012	ev_idle_start (EV_P_ ev_idle *w)
		2013	{
		2014	if (expect_false (ev_is_active (w)))
		2015	return;
		2016
		2017	ev_start (EV_A_ (W)w, ++idlecnt);
695	array_needsize (idles, idlemax, idlecnt, );	2018	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
696	idles [idlecnt - 1] = w;	2019	idles [idlecnt - 1] = w;
697	}	2020	}
698		2021
699	void evidle_stop (struct ev_idle *w)	2022	void
		2023	ev_idle_stop (EV_P_ ev_idle *w)
700	{	2024	{
		2025	ev_clear_pending (EV_A_ (W)w);
		2026	if (expect_false (!ev_is_active (w)))
		2027	return;
		2028
		2029	{
		2030	int active = ((W)w)->active;
701	idles [w->active - 1] = idles [--idlecnt];	2031	idles [active - 1] = idles [--idlecnt];
702	ev_stop ((struct ev_watcher *)w);	2032	((W)idles [active - 1])->active = active;
703	}	2033	}
704		2034
		2035	ev_stop (EV_A_ (W)w);
		2036	}
		2037
		2038	void
		2039	ev_prepare_start (EV_P_ ev_prepare *w)
		2040	{
		2041	if (expect_false (ev_is_active (w)))
		2042	return;
		2043
		2044	ev_start (EV_A_ (W)w, ++preparecnt);
		2045	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2046	prepares [preparecnt - 1] = w;
		2047	}
		2048
		2049	void
		2050	ev_prepare_stop (EV_P_ ev_prepare *w)
		2051	{
		2052	ev_clear_pending (EV_A_ (W)w);
		2053	if (expect_false (!ev_is_active (w)))
		2054	return;
		2055
		2056	{
		2057	int active = ((W)w)->active;
		2058	prepares [active - 1] = prepares [--preparecnt];
		2059	((W)prepares [active - 1])->active = active;
		2060	}
		2061
		2062	ev_stop (EV_A_ (W)w);
		2063	}
		2064
		2065	void
705	void evcheck_start (struct ev_check *w)	2066	ev_check_start (EV_P_ ev_check *w)
706	{	2067	{
707	if (ev_is_active (w))	2068	if (expect_false (ev_is_active (w)))
708	return;	2069	return;
709		2070
710	ev_start ((struct ev_watcher *)w, ++checkcnt);	2071	ev_start (EV_A_ (W)w, ++checkcnt);
711	array_needsize (checks, checkmax, checkcnt, );	2072	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
712	checks [checkcnt - 1] = w;	2073	checks [checkcnt - 1] = w;
713	}	2074	}
714		2075
		2076	void
715	void evcheck_stop (struct ev_check *w)	2077	ev_check_stop (EV_P_ ev_check *w)
716	{	2078	{
		2079	ev_clear_pending (EV_A_ (W)w);
		2080	if (expect_false (!ev_is_active (w)))
		2081	return;
		2082
		2083	{
		2084	int active = ((W)w)->active;
717	checks [w->active - 1] = checks [--checkcnt];	2085	checks [active - 1] = checks [--checkcnt];
718	ev_stop ((struct ev_watcher *)w);	2086	((W)checks [active - 1])->active = active;
		2087	}
		2088
		2089	ev_stop (EV_A_ (W)w);
719	}	2090	}
		2091
		2092	#if EV_EMBED_ENABLE
		2093	void noinline
		2094	ev_embed_sweep (EV_P_ ev_embed *w)
		2095	{
		2096	ev_loop (w->loop, EVLOOP_NONBLOCK);
		2097	}
		2098
		2099	static void
		2100	embed_cb (EV_P_ ev_io *io, int revents)
		2101	{
		2102	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2103
		2104	if (ev_cb (w))
		2105	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2106	else
		2107	ev_embed_sweep (loop, w);
		2108	}
		2109
		2110	void
		2111	ev_embed_start (EV_P_ ev_embed *w)
		2112	{
		2113	if (expect_false (ev_is_active (w)))
		2114	return;
		2115
		2116	{
		2117	struct ev_loop *loop = w->loop;
		2118	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2119	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		2120	}
		2121
		2122	ev_set_priority (&w->io, ev_priority (w));
		2123	ev_io_start (EV_A_ &w->io);
		2124
		2125	ev_start (EV_A_ (W)w, 1);
		2126	}
		2127
		2128	void
		2129	ev_embed_stop (EV_P_ ev_embed *w)
		2130	{
		2131	ev_clear_pending (EV_A_ (W)w);
		2132	if (expect_false (!ev_is_active (w)))
		2133	return;
		2134
		2135	ev_io_stop (EV_A_ &w->io);
		2136
		2137	ev_stop (EV_A_ (W)w);
		2138	}
		2139	#endif
		2140
		2141	#if EV_FORK_ENABLE
		2142	void
		2143	ev_fork_start (EV_P_ ev_fork *w)
		2144	{
		2145	if (expect_false (ev_is_active (w)))
		2146	return;
		2147
		2148	ev_start (EV_A_ (W)w, ++forkcnt);
		2149	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2150	forks [forkcnt - 1] = w;
		2151	}
		2152
		2153	void
		2154	ev_fork_stop (EV_P_ ev_fork *w)
		2155	{
		2156	ev_clear_pending (EV_A_ (W)w);
		2157	if (expect_false (!ev_is_active (w)))
		2158	return;
		2159
		2160	{
		2161	int active = ((W)w)->active;
		2162	forks [active - 1] = forks [--forkcnt];
		2163	((W)forks [active - 1])->active = active;
		2164	}
		2165
		2166	ev_stop (EV_A_ (W)w);
		2167	}
		2168	#endif
720		2169
721	/*****************************************************************************/	2170	/*****************************************************************************/
722	#if 1	2171
		2172	struct ev_once
		2173	{
		2174	ev_io io;
		2175	ev_timer to;
		2176	void (*cb)(int revents, void *arg);
		2177	void *arg;
		2178	};
723		2179
724	static void	2180	static void
725	sin_cb (struct ev_io *w, int revents)	2181	once_cb (EV_P_ struct ev_once *once, int revents)
726	{	2182	{
727	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2183	void (*cb)(int revents, void *arg) = once->cb;
		2184	void *arg = once->arg;
		2185
		2186	ev_io_stop (EV_A_ &once->io);
		2187	ev_timer_stop (EV_A_ &once->to);
		2188	ev_free (once);
		2189
		2190	cb (revents, arg);
728	}	2191	}
729		2192
730	static void	2193	static void
731	ocb (struct ev_timer *w, int revents)	2194	once_cb_io (EV_P_ ev_io *w, int revents)
732	{	2195	{
733	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2196	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
734	evtimer_stop (w);
735	evtimer_start (w);
736	}	2197	}
737		2198
738	static void	2199	static void
739	scb (struct ev_signal *w, int revents)	2200	once_cb_to (EV_P_ ev_timer *w, int revents)
740	{	2201	{
741	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	2202	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
742	}	2203	}
743		2204
744	static void	2205	void
745	gcb (struct ev_signal *w, int revents)	2206	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
746	{	2207	{
747	fprintf (stderr, "generic %x\n", revents);	2208	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
748	}
749		2209
750	int main (void)	2210	if (expect_false (!once))
751	{
752	struct ev_io sin;
753
754	ev_init (0);
755
756	evw_init (&sin, sin_cb, 55);
757	evio_set (&sin, 0, EV_READ);
758	evio_start (&sin);
759
760	struct ev_timer t[10000];
761
762	#if 0
763	int i;
764	for (i = 0; i < 10000; ++i)
765	{
766	struct ev_timer *w = t + i;
767	evw_init (w, ocb, i);
768	evtimer_set_abs (w, drand48 (), 0.99775533);
769	evtimer_start (w);
770	if (drand48 () < 0.5)
771	evtimer_stop (w);
772	}	2211	{
773	#endif	2212	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
774
775	struct ev_timer t1;
776	evw_init (&t1, ocb, 0);
777	evtimer_set_abs (&t1, 5, 10);
778	evtimer_start (&t1);
779
780	struct ev_signal sig;
781	evw_init (&sig, scb, 65535);
782	evsignal_set (&sig, SIGQUIT);
783	evsignal_start (&sig);
784
785	struct ev_check cw;
786	evw_init (&cw, gcb, 0);
787	evcheck_start (&cw);
788
789	struct ev_idle iw;
790	evw_init (&iw, gcb, 0);
791	evidle_start (&iw);
792
793	ev_loop (0);
794
795	return 0;	2213	return;
796	}	2214	}
797		2215
798	#endif	2216	once->cb = cb;
		2217	once->arg = arg;
799		2218
		2219	ev_init (&once->io, once_cb_io);
		2220	if (fd >= 0)
		2221	{
		2222	ev_io_set (&once->io, fd, events);
		2223	ev_io_start (EV_A_ &once->io);
		2224	}
800		2225
		2226	ev_init (&once->to, once_cb_to);
		2227	if (timeout >= 0.)
		2228	{
		2229	ev_timer_set (&once->to, timeout, 0.);
		2230	ev_timer_start (EV_A_ &once->to);
		2231	}
		2232	}
801		2233
		2234	#ifdef __cplusplus
		2235	}
		2236	#endif
802		2237

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