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Comparing libev/ev.c (file contents):
Revision 1.10 by root, Wed Oct 31 07:36:03 2007 UTC vs.
Revision 1.190 by root, Fri Dec 21 01:26:04 2007 UTC

		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without
		8	* modification, are permitted provided that the following conditions are
		9	* met:
		10	*
		11	* * Redistributions of source code must retain the above copyright
		12	* notice, this list of conditions and the following disclaimer.
		13	*
		14	* * Redistributions in binary form must reproduce the above
		15	* copyright notice, this list of conditions and the following
		16	* disclaimer in the documentation and/or other materials provided
		17	* with the distribution.
		18	*
		19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
		22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
		23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
		24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
		25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
		29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		30	*/
		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
		37	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
		40	# include "config.h"
		41	# endif
		42
		43	# if HAVE_CLOCK_GETTIME
		44	# ifndef EV_USE_MONOTONIC
		45	# define EV_USE_MONOTONIC 1
		46	# endif
		47	# ifndef EV_USE_REALTIME
		48	# define EV_USE_REALTIME 1
		49	# endif
		50	# else
		51	# ifndef EV_USE_MONOTONIC
		52	# define EV_USE_MONOTONIC 0
		53	# endif
		54	# ifndef EV_USE_REALTIME
		55	# define EV_USE_REALTIME 0
		56	# endif
		57	# endif
		58
		59	# ifndef EV_USE_SELECT
		60	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		61	# define EV_USE_SELECT 1
		62	# else
		63	# define EV_USE_SELECT 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_POLL
		68	# if HAVE_POLL && HAVE_POLL_H
		69	# define EV_USE_POLL 1
		70	# else
		71	# define EV_USE_POLL 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_EPOLL
		76	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		77	# define EV_USE_EPOLL 1
		78	# else
		79	# define EV_USE_EPOLL 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_KQUEUE
		84	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		85	# define EV_USE_KQUEUE 1
		86	# else
		87	# define EV_USE_KQUEUE 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_PORT
		92	# if HAVE_PORT_H && HAVE_PORT_CREATE
		93	# define EV_USE_PORT 1
		94	# else
		95	# define EV_USE_PORT 0
		96	# endif
		97	# endif
		98
		99	# ifndef EV_USE_INOTIFY
		100	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		101	# define EV_USE_INOTIFY 1
		102	# else
		103	# define EV_USE_INOTIFY 0
		104	# endif
		105	# endif
		106
		107	#endif
		108
1	#include <math.h>	109	#include <math.h>
2	#include <stdlib.h>	110	#include <stdlib.h>
3	#include <unistd.h>
4	#include <fcntl.h>	111	#include <fcntl.h>
5	#include <signal.h>	112	#include <stddef.h>
6		113
7	#include <stdio.h>	114	#include <stdio.h>
8		115
9	#include <assert.h>	116	#include <assert.h>
10	#include <errno.h>	117	#include <errno.h>
11	#include <sys/time.h>	118	#include <sys/types.h>
12	#include <time.h>	119	#include <time.h>
13		120
14	#ifndef HAVE_MONOTONIC	121	#include <signal.h>
15	# ifdef CLOCK_MONOTONIC	122
16	# define HAVE_MONOTONIC 1	123	#ifdef EV_H
		124	# include EV_H
		125	#else
		126	# include "ev.h"
		127	#endif
		128
		129	#ifndef _WIN32
		130	# include <sys/time.h>
		131	# include <sys/wait.h>
		132	# include <unistd.h>
		133	#else
		134	# define WIN32_LEAN_AND_MEAN
		135	# include <windows.h>
		136	# ifndef EV_SELECT_IS_WINSOCKET
		137	# define EV_SELECT_IS_WINSOCKET 1
17	# endif	138	# endif
18	#endif	139	#endif
19		140
		141	/**/
		142
		143	#ifndef EV_USE_MONOTONIC
		144	# define EV_USE_MONOTONIC 0
		145	#endif
		146
		147	#ifndef EV_USE_REALTIME
		148	# define EV_USE_REALTIME 0
		149	#endif
		150
20	#ifndef HAVE_SELECT	151	#ifndef EV_USE_SELECT
21	# define HAVE_SELECT 1	152	# define EV_USE_SELECT 1
		153	#endif
		154
		155	#ifndef EV_USE_POLL
		156	# ifdef _WIN32
		157	# define EV_USE_POLL 0
		158	# else
		159	# define EV_USE_POLL 1
22	#endif	160	# endif
		161	#endif
23		162
24	#ifndef HAVE_EPOLL	163	#ifndef EV_USE_EPOLL
25	# define HAVE_EPOLL 0	164	# define EV_USE_EPOLL 0
		165	#endif
		166
		167	#ifndef EV_USE_KQUEUE
		168	# define EV_USE_KQUEUE 0
		169	#endif
		170
		171	#ifndef EV_USE_PORT
		172	# define EV_USE_PORT 0
		173	#endif
		174
		175	#ifndef EV_USE_INOTIFY
		176	# define EV_USE_INOTIFY 0
		177	#endif
		178
		179	#ifndef EV_PID_HASHSIZE
		180	# if EV_MINIMAL
		181	# define EV_PID_HASHSIZE 1
		182	# else
		183	# define EV_PID_HASHSIZE 16
26	#endif	184	# endif
		185	#endif
27		186
28	#ifndef HAVE_REALTIME	187	#ifndef EV_INOTIFY_HASHSIZE
29	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	188	# if EV_MINIMAL
		189	# define EV_INOTIFY_HASHSIZE 1
		190	# else
		191	# define EV_INOTIFY_HASHSIZE 16
30	#endif	192	# endif
		193	#endif
		194
		195	/**/
		196
		197	#ifndef CLOCK_MONOTONIC
		198	# undef EV_USE_MONOTONIC
		199	# define EV_USE_MONOTONIC 0
		200	#endif
		201
		202	#ifndef CLOCK_REALTIME
		203	# undef EV_USE_REALTIME
		204	# define EV_USE_REALTIME 0
		205	#endif
		206
		207	#if !EV_STAT_ENABLE
		208	# undef EV_USE_INOTIFY
		209	# define EV_USE_INOTIFY 0
		210	#endif
		211
		212	#if EV_USE_INOTIFY
		213	# include <sys/inotify.h>
		214	#endif
		215
		216	#if EV_SELECT_IS_WINSOCKET
		217	# include <winsock.h>
		218	#endif
		219
		220	/**/
		221
		222	/*
		223	* This is used to avoid floating point rounding problems.
		224	* It is added to ev_rt_now when scheduling periodics
		225	* to ensure progress, time-wise, even when rounding
		226	* errors are against us.
		227	* This value is good at least till the year 4000.
		228	* Better solutions welcome.
		229	*/
		230	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
31		231
32	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	232	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
33	#define MAX_BLOCKTIME 60.	233	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		234	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
34		235
35	#include "ev.h"	236	#if __GNUC__ >= 4
		237	# define expect(expr,value) __builtin_expect ((expr),(value))
		238	# define noinline __attribute__ ((noinline))
		239	#else
		240	# define expect(expr,value) (expr)
		241	# define noinline
		242	# if __STDC_VERSION__ < 199901L
		243	# define inline
		244	# endif
		245	#endif
36		246
37	struct ev_watcher {	247	#define expect_false(expr) expect ((expr) != 0, 0)
38	EV_WATCHER (ev_watcher);	248	#define expect_true(expr) expect ((expr) != 0, 1)
39	};	249	#define inline_size static inline
40		250
41	struct ev_watcher_list {	251	#if EV_MINIMAL
42	EV_WATCHER_LIST (ev_watcher_list);	252	# define inline_speed static noinline
43	};	253	#else
		254	# define inline_speed static inline
		255	#endif
44		256
		257	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		258	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		259
		260	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		261	#define EMPTY2(a,b) /* used to suppress some warnings */
		262
45	typedef struct ev_watcher *W;	263	typedef ev_watcher *W;
46	typedef struct ev_watcher_list *WL;	264	typedef ev_watcher_list *WL;
		265	typedef ev_watcher_time *WT;
47		266
48	static ev_tstamp now, diff; /* monotonic clock */	267	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		268
		269	#ifdef _WIN32
		270	# include "ev_win32.c"
		271	#endif
		272
		273	/*****************************************************************************/
		274
		275	static void (*syserr_cb)(const char *msg);
		276
		277	void
		278	ev_set_syserr_cb (void (*cb)(const char *msg))
		279	{
		280	syserr_cb = cb;
		281	}
		282
		283	static void noinline
		284	syserr (const char *msg)
		285	{
		286	if (!msg)
		287	msg = "(libev) system error";
		288
		289	if (syserr_cb)
		290	syserr_cb (msg);
		291	else
		292	{
		293	perror (msg);
		294	abort ();
		295	}
		296	}
		297
		298	static void *(*alloc)(void *ptr, long size);
		299
		300	void
		301	ev_set_allocator (void *(*cb)(void *ptr, long size))
		302	{
		303	alloc = cb;
		304	}
		305
		306	inline_speed void *
		307	ev_realloc (void *ptr, long size)
		308	{
		309	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		310
		311	if (!ptr && size)
		312	{
		313	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		314	abort ();
		315	}
		316
		317	return ptr;
		318	}
		319
		320	#define ev_malloc(size) ev_realloc (0, (size))
		321	#define ev_free(ptr) ev_realloc ((ptr), 0)
		322
		323	/*****************************************************************************/
		324
		325	typedef struct
		326	{
		327	WL head;
		328	unsigned char events;
		329	unsigned char reify;
		330	#if EV_SELECT_IS_WINSOCKET
		331	SOCKET handle;
		332	#endif
		333	} ANFD;
		334
		335	typedef struct
		336	{
		337	W w;
		338	int events;
		339	} ANPENDING;
		340
		341	#if EV_USE_INOTIFY
		342	typedef struct
		343	{
		344	WL head;
		345	} ANFS;
		346	#endif
		347
		348	#if EV_MULTIPLICITY
		349
		350	struct ev_loop
		351	{
		352	ev_tstamp ev_rt_now;
		353	#define ev_rt_now ((loop)->ev_rt_now)
		354	#define VAR(name,decl) decl;
		355	#include "ev_vars.h"
		356	#undef VAR
		357	};
		358	#include "ev_wrap.h"
		359
		360	static struct ev_loop default_loop_struct;
		361	struct ev_loop *ev_default_loop_ptr;
		362
		363	#else
		364
49	ev_tstamp ev_now;	365	ev_tstamp ev_rt_now;
50	int ev_method;	366	#define VAR(name,decl) static decl;
		367	#include "ev_vars.h"
		368	#undef VAR
51		369
52	static int have_monotonic; /* runtime */	370	static int ev_default_loop_ptr;
53		371
54	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	372	#endif
55	static void (*method_modify)(int fd, int oev, int nev);
56	static void (*method_poll)(ev_tstamp timeout);
57		373
58	/*****************************************************************************/	374	/*****************************************************************************/
59		375
60	ev_tstamp	376	ev_tstamp
61	ev_time (void)	377	ev_time (void)
62	{	378	{
63	#if HAVE_REALTIME	379	#if EV_USE_REALTIME
64	struct timespec ts;	380	struct timespec ts;
65	clock_gettime (CLOCK_REALTIME, &ts);	381	clock_gettime (CLOCK_REALTIME, &ts);
66	return ts.tv_sec + ts.tv_nsec * 1e-9;	382	return ts.tv_sec + ts.tv_nsec * 1e-9;
67	#else	383	#else
68	struct timeval tv;	384	struct timeval tv;
69	gettimeofday (&tv, 0);	385	gettimeofday (&tv, 0);
70	return tv.tv_sec + tv.tv_usec * 1e-6;	386	return tv.tv_sec + tv.tv_usec * 1e-6;
71	#endif	387	#endif
72	}	388	}
73		389
74	static ev_tstamp	390	ev_tstamp inline_size
75	get_clock (void)	391	get_clock (void)
76	{	392	{
77	#if HAVE_MONOTONIC	393	#if EV_USE_MONOTONIC
78	if (have_monotonic)	394	if (expect_true (have_monotonic))
79	{	395	{
80	struct timespec ts;	396	struct timespec ts;
81	clock_gettime (CLOCK_MONOTONIC, &ts);	397	clock_gettime (CLOCK_MONOTONIC, &ts);
82	return ts.tv_sec + ts.tv_nsec * 1e-9;	398	return ts.tv_sec + ts.tv_nsec * 1e-9;
83	}	399	}
84	#endif	400	#endif
85		401
86	return ev_time ();	402	return ev_time ();
87	}	403	}
88		404
		405	#if EV_MULTIPLICITY
		406	ev_tstamp
		407	ev_now (EV_P)
		408	{
		409	return ev_rt_now;
		410	}
		411	#endif
		412
		413	int inline_size
		414	array_nextsize (int elem, int cur, int cnt)
		415	{
		416	int ncur = cur + 1;
		417
		418	do
		419	ncur <<= 1;
		420	while (cnt > ncur);
		421
		422	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		423	if (elem * ncur > 4096)
		424	{
		425	ncur *= elem;
		426	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		427	ncur = ncur - sizeof (void *) * 4;
		428	ncur /= elem;
		429	}
		430
		431	return ncur;
		432	}
		433
		434	static noinline void *
		435	array_realloc (int elem, void *base, int *cur, int cnt)
		436	{
		437	*cur = array_nextsize (elem, *cur, cnt);
		438	return ev_realloc (base, elem * *cur);
		439	}
		440
89	#define array_needsize(base,cur,cnt,init) \	441	#define array_needsize(type,base,cur,cnt,init) \
90	if ((cnt) > cur) \	442	if (expect_false ((cnt) > (cur))) \
91	{ \	443	{ \
92	int newcnt = cur ? cur << 1 : 16; \	444	int ocur_ = (cur); \
93	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	445	(base) = (type *)array_realloc \
94	base = realloc (base, sizeof (*base) * (newcnt)); \	446	(sizeof (type), (base), &(cur), (cnt)); \
95	init (base + cur, newcnt - cur); \	447	init ((base) + (ocur_), (cur) - ocur_); \
96	cur = newcnt; \
97	}	448	}
		449
		450	#if 0
		451	#define array_slim(type,stem) \
		452	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		453	{ \
		454	stem ## max = array_roundsize (stem ## cnt >> 1); \
		455	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		456	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		457	}
		458	#endif
		459
		460	#define array_free(stem, idx) \
		461	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
98		462
99	/*****************************************************************************/	463	/*****************************************************************************/
100		464
		465	void noinline
		466	ev_feed_event (EV_P_ void *w, int revents)
		467	{
		468	W w_ = (W)w;
		469	int pri = ABSPRI (w_);
		470
		471	if (expect_false (w_->pending))
		472	pendings [pri][w_->pending - 1].events |= revents;
		473	else
		474	{
		475	w_->pending = ++pendingcnt [pri];
		476	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		477	pendings [pri][w_->pending - 1].w = w_;
		478	pendings [pri][w_->pending - 1].events = revents;
		479	}
		480	}
		481
		482	void inline_speed
		483	queue_events (EV_P_ W *events, int eventcnt, int type)
		484	{
		485	int i;
		486
		487	for (i = 0; i < eventcnt; ++i)
		488	ev_feed_event (EV_A_ events [i], type);
		489	}
		490
		491	/*****************************************************************************/
		492
		493	void inline_size
		494	anfds_init (ANFD *base, int count)
		495	{
		496	while (count--)
		497	{
		498	base->head = 0;
		499	base->events = EV_NONE;
		500	base->reify = 0;
		501
		502	++base;
		503	}
		504	}
		505
		506	void inline_speed
		507	fd_event (EV_P_ int fd, int revents)
		508	{
		509	ANFD *anfd = anfds + fd;
		510	ev_io *w;
		511
		512	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		513	{
		514	int ev = w->events & revents;
		515
		516	if (ev)
		517	ev_feed_event (EV_A_ (W)w, ev);
		518	}
		519	}
		520
		521	void
		522	ev_feed_fd_event (EV_P_ int fd, int revents)
		523	{
		524	if (fd >= 0 && fd < anfdmax)
		525	fd_event (EV_A_ fd, revents);
		526	}
		527
		528	void inline_size
		529	fd_reify (EV_P)
		530	{
		531	int i;
		532
		533	for (i = 0; i < fdchangecnt; ++i)
		534	{
		535	int fd = fdchanges [i];
		536	ANFD *anfd = anfds + fd;
		537	ev_io *w;
		538
		539	unsigned char events = 0;
		540
		541	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		542	events |= (unsigned char)w->events;
		543
		544	#if EV_SELECT_IS_WINSOCKET
		545	if (events)
		546	{
		547	unsigned long argp;
		548	anfd->handle = _get_osfhandle (fd);
		549	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		550	}
		551	#endif
		552
		553	{
		554	unsigned char o_events = anfd->events;
		555	unsigned char o_reify = anfd->reify;
		556
		557	anfd->reify = 0;
		558	anfd->events = events;
		559
		560	if (o_events != events || o_reify & EV_IOFDSET)
		561	backend_modify (EV_A_ fd, o_events, events);
		562	}
		563	}
		564
		565	fdchangecnt = 0;
		566	}
		567
		568	void inline_size
		569	fd_change (EV_P_ int fd, int flags)
		570	{
		571	unsigned char reify = anfds [fd].reify;
		572	anfds [fd].reify |= flags;
		573
		574	if (expect_true (!reify))
		575	{
		576	++fdchangecnt;
		577	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		578	fdchanges [fdchangecnt - 1] = fd;
		579	}
		580	}
		581
		582	void inline_speed
		583	fd_kill (EV_P_ int fd)
		584	{
		585	ev_io *w;
		586
		587	while ((w = (ev_io *)anfds [fd].head))
		588	{
		589	ev_io_stop (EV_A_ w);
		590	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		591	}
		592	}
		593
		594	int inline_size
		595	fd_valid (int fd)
		596	{
		597	#ifdef _WIN32
		598	return _get_osfhandle (fd) != -1;
		599	#else
		600	return fcntl (fd, F_GETFD) != -1;
		601	#endif
		602	}
		603
		604	/* called on EBADF to verify fds */
		605	static void noinline
		606	fd_ebadf (EV_P)
		607	{
		608	int fd;
		609
		610	for (fd = 0; fd < anfdmax; ++fd)
		611	if (anfds [fd].events)
		612	if (!fd_valid (fd) == -1 && errno == EBADF)
		613	fd_kill (EV_A_ fd);
		614	}
		615
		616	/* called on ENOMEM in select/poll to kill some fds and retry */
		617	static void noinline
		618	fd_enomem (EV_P)
		619	{
		620	int fd;
		621
		622	for (fd = anfdmax; fd--; )
		623	if (anfds [fd].events)
		624	{
		625	fd_kill (EV_A_ fd);
		626	return;
		627	}
		628	}
		629
		630	/* usually called after fork if backend needs to re-arm all fds from scratch */
		631	static void noinline
		632	fd_rearm_all (EV_P)
		633	{
		634	int fd;
		635
		636	for (fd = 0; fd < anfdmax; ++fd)
		637	if (anfds [fd].events)
		638	{
		639	anfds [fd].events = 0;
		640	fd_change (EV_A_ fd, EV_IOFDSET | 1);
		641	}
		642	}
		643
		644	/*****************************************************************************/
		645
		646	void inline_speed
		647	upheap (WT *heap, int k)
		648	{
		649	WT w = heap [k];
		650
		651	while (k)
		652	{
		653	int p = (k - 1) >> 1;
		654
		655	if (heap [p]->at <= w->at)
		656	break;
		657
		658	heap [k] = heap [p];
		659	((W)heap [k])->active = k + 1;
		660	k = p;
		661	}
		662
		663	heap [k] = w;
		664	((W)heap [k])->active = k + 1;
		665	}
		666
		667	void inline_speed
		668	downheap (WT *heap, int N, int k)
		669	{
		670	WT w = heap [k];
		671
		672	for (;;)
		673	{
		674	int c = (k << 1) + 1;
		675
		676	if (c >= N)
		677	break;
		678
		679	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		680	? 1 : 0;
		681
		682	if (w->at <= heap [c]->at)
		683	break;
		684
		685	heap [k] = heap [c];
		686	((W)heap [k])->active = k + 1;
		687
		688	k = c;
		689	}
		690
		691	heap [k] = w;
		692	((W)heap [k])->active = k + 1;
		693	}
		694
		695	void inline_size
		696	adjustheap (WT *heap, int N, int k)
		697	{
		698	upheap (heap, k);
		699	downheap (heap, N, k);
		700	}
		701
		702	/*****************************************************************************/
		703
101	typedef struct	704	typedef struct
102	{	705	{
103	struct ev_io *head;	706	WL head;
104	unsigned char wev, rev; /* want, received event set */
105	} ANFD;
106
107	static ANFD *anfds;
108	static int anfdmax;
109
110	static int *fdchanges;
111	static int fdchangemax, fdchangecnt;
112
113	static void
114	anfds_init (ANFD *base, int count)
115	{
116	while (count--)
117	{
118	base->head = 0;
119	base->wev = base->rev = EV_NONE;
120	++base;
121	}
122	}
123
124	typedef struct
125	{
126	W w;
127	int events;
128	} ANPENDING;
129
130	static ANPENDING *pendings;
131	static int pendingmax, pendingcnt;
132
133	static void
134	event (W w, int events)
135	{
136	w->pending = ++pendingcnt;
137	array_needsize (pendings, pendingmax, pendingcnt, );
138	pendings [pendingcnt - 1].w = w;
139	pendings [pendingcnt - 1].events = events;
140	}
141
142	static void
143	fd_event (int fd, int events)
144	{
145	ANFD *anfd = anfds + fd;
146	struct ev_io *w;
147
148	for (w = anfd->head; w; w = w->next)
149	{
150	int ev = w->events & events;
151
152	if (ev)
153	event ((W)w, ev);
154	}
155	}
156
157	static void
158	queue_events (W *events, int eventcnt, int type)
159	{
160	int i;
161
162	for (i = 0; i < eventcnt; ++i)
163	event (events [i], type);
164	}
165
166	/*****************************************************************************/
167
168	static struct ev_timer **atimers;
169	static int atimermax, atimercnt;
170
171	static struct ev_timer **rtimers;
172	static int rtimermax, rtimercnt;
173
174	static void
175	upheap (struct ev_timer **timers, int k)
176	{
177	struct ev_timer *w = timers [k];
178
179	while (k && timers [k >> 1]->at > w->at)
180	{
181	timers [k] = timers [k >> 1];
182	timers [k]->active = k + 1;
183	k >>= 1;
184	}
185
186	timers [k] = w;
187	timers [k]->active = k + 1;
188
189	}
190
191	static void
192	downheap (struct ev_timer **timers, int N, int k)
193	{
194	struct ev_timer *w = timers [k];
195
196	while (k < (N >> 1))
197	{
198	int j = k << 1;
199
200	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
201	++j;
202
203	if (w->at <= timers [j]->at)
204	break;
205
206	timers [k] = timers [j];
207	timers [k]->active = k + 1;
208	k = j;
209	}
210
211	timers [k] = w;
212	timers [k]->active = k + 1;
213	}
214
215	/*****************************************************************************/
216
217	typedef struct
218	{
219	struct ev_signal *head;
220	sig_atomic_t gotsig;	707	sig_atomic_t volatile gotsig;
221	} ANSIG;	708	} ANSIG;
222		709
223	static ANSIG *signals;	710	static ANSIG *signals;
224	static int signalmax;	711	static int signalmax;
225		712
226	static int sigpipe [2];	713	static int sigpipe [2];
227	static sig_atomic_t gotsig;	714	static sig_atomic_t volatile gotsig;
228	static struct ev_io sigev;	715	static ev_io sigev;
229		716
230	static void	717	void inline_size
231	signals_init (ANSIG *base, int count)	718	signals_init (ANSIG *base, int count)
232	{	719	{
233	while (count--)	720	while (count--)
234	{	721	{
235	base->head = 0;	722	base->head = 0;
236	base->gotsig = 0;	723	base->gotsig = 0;
		724
237	++base;	725	++base;
238	}	726	}
239	}	727	}
240		728
241	static void	729	static void
242	sighandler (int signum)	730	sighandler (int signum)
243	{	731	{
		732	#if _WIN32
		733	signal (signum, sighandler);
		734	#endif
		735
244	signals [signum - 1].gotsig = 1;	736	signals [signum - 1].gotsig = 1;
245		737
246	if (!gotsig)	738	if (!gotsig)
247	{	739	{
		740	int old_errno = errno;
248	gotsig = 1;	741	gotsig = 1;
249	write (sigpipe [1], &gotsig, 1);	742	write (sigpipe [1], &signum, 1);
		743	errno = old_errno;
250	}	744	}
		745	}
		746
		747	void noinline
		748	ev_feed_signal_event (EV_P_ int signum)
		749	{
		750	WL w;
		751
		752	#if EV_MULTIPLICITY
		753	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		754	#endif
		755
		756	--signum;
		757
		758	if (signum < 0 || signum >= signalmax)
		759	return;
		760
		761	signals [signum].gotsig = 0;
		762
		763	for (w = signals [signum].head; w; w = w->next)
		764	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
251	}	765	}
252		766
253	static void	767	static void
254	sigcb (struct ev_io *iow, int revents)	768	sigcb (EV_P_ ev_io *iow, int revents)
255	{	769	{
256	struct ev_signal *w;
257	int sig;	770	int signum;
258		771
		772	read (sigpipe [0], &revents, 1);
259	gotsig = 0;	773	gotsig = 0;
260	read (sigpipe [0], &revents, 1);
261		774
262	for (sig = signalmax; sig--; )	775	for (signum = signalmax; signum--; )
263	if (signals [sig].gotsig)	776	if (signals [signum].gotsig)
		777	ev_feed_signal_event (EV_A_ signum + 1);
		778	}
		779
		780	void inline_speed
		781	fd_intern (int fd)
		782	{
		783	#ifdef _WIN32
		784	int arg = 1;
		785	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		786	#else
		787	fcntl (fd, F_SETFD, FD_CLOEXEC);
		788	fcntl (fd, F_SETFL, O_NONBLOCK);
		789	#endif
		790	}
		791
		792	static void noinline
		793	siginit (EV_P)
		794	{
		795	fd_intern (sigpipe [0]);
		796	fd_intern (sigpipe [1]);
		797
		798	ev_io_set (&sigev, sigpipe [0], EV_READ);
		799	ev_io_start (EV_A_ &sigev);
		800	ev_unref (EV_A); /* child watcher should not keep loop alive */
		801	}
		802
		803	/*****************************************************************************/
		804
		805	static WL childs [EV_PID_HASHSIZE];
		806
		807	#ifndef _WIN32
		808
		809	static ev_signal childev;
		810
		811	void inline_speed
		812	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		813	{
		814	ev_child *w;
		815
		816	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		817	if (w->pid == pid || !w->pid)
264	{	818	{
265	signals [sig].gotsig = 0;	819	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
266		820	w->rpid = pid;
267	for (w = signals [sig].head; w; w = w->next)	821	w->rstatus = status;
268	event ((W)w, EV_SIGNAL);	822	ev_feed_event (EV_A_ (W)w, EV_CHILD);
269	}	823	}
270	}	824	}
271		825
		826	#ifndef WCONTINUED
		827	# define WCONTINUED 0
		828	#endif
		829
272	static void	830	static void
273	siginit (void)	831	childcb (EV_P_ ev_signal *sw, int revents)
274	{	832	{
275	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	833	int pid, status;
276	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
277		834
278	/* rather than sort out wether we really need nb, set it */	835	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
279	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	836	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
280	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	837	if (!WCONTINUED
		838	|| errno != EINVAL
		839	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		840	return;
281		841
282	evio_set (&sigev, sigpipe [0], EV_READ);	842	/* make sure we are called again until all childs have been reaped */
283	evio_start (&sigev);	843	/* we need to do it this way so that the callback gets called before we continue */
		844	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		845
		846	child_reap (EV_A_ sw, pid, pid, status);
		847	if (EV_PID_HASHSIZE > 1)
		848	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
284	}	849	}
		850
		851	#endif
285		852
286	/*****************************************************************************/	853	/*****************************************************************************/
287		854
288	static struct ev_idle **idles;	855	#if EV_USE_PORT
289	static int idlemax, idlecnt;	856	# include "ev_port.c"
		857	#endif
		858	#if EV_USE_KQUEUE
		859	# include "ev_kqueue.c"
		860	#endif
		861	#if EV_USE_EPOLL
		862	# include "ev_epoll.c"
		863	#endif
		864	#if EV_USE_POLL
		865	# include "ev_poll.c"
		866	#endif
		867	#if EV_USE_SELECT
		868	# include "ev_select.c"
		869	#endif
290		870
291	static struct ev_check **checks;	871	int
292	static int checkmax, checkcnt;	872	ev_version_major (void)
		873	{
		874	return EV_VERSION_MAJOR;
		875	}
		876
		877	int
		878	ev_version_minor (void)
		879	{
		880	return EV_VERSION_MINOR;
		881	}
		882
		883	/* return true if we are running with elevated privileges and should ignore env variables */
		884	int inline_size
		885	enable_secure (void)
		886	{
		887	#ifdef _WIN32
		888	return 0;
		889	#else
		890	return getuid () != geteuid ()
		891	|| getgid () != getegid ();
		892	#endif
		893	}
		894
		895	unsigned int
		896	ev_supported_backends (void)
		897	{
		898	unsigned int flags = 0;
		899
		900	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		901	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		902	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		903	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		904	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		905
		906	return flags;
		907	}
		908
		909	unsigned int
		910	ev_recommended_backends (void)
		911	{
		912	unsigned int flags = ev_supported_backends ();
		913
		914	#ifndef __NetBSD__
		915	/* kqueue is borked on everything but netbsd apparently */
		916	/* it usually doesn't work correctly on anything but sockets and pipes */
		917	flags &= ~EVBACKEND_KQUEUE;
		918	#endif
		919	#ifdef __APPLE__
		920	// flags &= ~EVBACKEND_KQUEUE; for documentation
		921	flags &= ~EVBACKEND_POLL;
		922	#endif
		923
		924	return flags;
		925	}
		926
		927	unsigned int
		928	ev_embeddable_backends (void)
		929	{
		930	return EVBACKEND_EPOLL
		931	| EVBACKEND_KQUEUE
		932	| EVBACKEND_PORT;
		933	}
		934
		935	unsigned int
		936	ev_backend (EV_P)
		937	{
		938	return backend;
		939	}
		940
		941	unsigned int
		942	ev_loop_count (EV_P)
		943	{
		944	return loop_count;
		945	}
		946
		947	static void noinline
		948	loop_init (EV_P_ unsigned int flags)
		949	{
		950	if (!backend)
		951	{
		952	#if EV_USE_MONOTONIC
		953	{
		954	struct timespec ts;
		955	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		956	have_monotonic = 1;
		957	}
		958	#endif
		959
		960	ev_rt_now = ev_time ();
		961	mn_now = get_clock ();
		962	now_floor = mn_now;
		963	rtmn_diff = ev_rt_now - mn_now;
		964
		965	/* pid check not overridable via env */
		966	#ifndef _WIN32
		967	if (flags & EVFLAG_FORKCHECK)
		968	curpid = getpid ();
		969	#endif
		970
		971	if (!(flags & EVFLAG_NOENV)
		972	&& !enable_secure ()
		973	&& getenv ("LIBEV_FLAGS"))
		974	flags = atoi (getenv ("LIBEV_FLAGS"));
		975
		976	if (!(flags & 0x0000ffffUL))
		977	flags |= ev_recommended_backends ();
		978
		979	backend = 0;
		980	backend_fd = -1;
		981	#if EV_USE_INOTIFY
		982	fs_fd = -2;
		983	#endif
		984
		985	#if EV_USE_PORT
		986	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		987	#endif
		988	#if EV_USE_KQUEUE
		989	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		990	#endif
		991	#if EV_USE_EPOLL
		992	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		993	#endif
		994	#if EV_USE_POLL
		995	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		996	#endif
		997	#if EV_USE_SELECT
		998	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		999	#endif
		1000
		1001	ev_init (&sigev, sigcb);
		1002	ev_set_priority (&sigev, EV_MAXPRI);
		1003	}
		1004	}
		1005
		1006	static void noinline
		1007	loop_destroy (EV_P)
		1008	{
		1009	int i;
		1010
		1011	#if EV_USE_INOTIFY
		1012	if (fs_fd >= 0)
		1013	close (fs_fd);
		1014	#endif
		1015
		1016	if (backend_fd >= 0)
		1017	close (backend_fd);
		1018
		1019	#if EV_USE_PORT
		1020	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1021	#endif
		1022	#if EV_USE_KQUEUE
		1023	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1024	#endif
		1025	#if EV_USE_EPOLL
		1026	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1027	#endif
		1028	#if EV_USE_POLL
		1029	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1030	#endif
		1031	#if EV_USE_SELECT
		1032	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1033	#endif
		1034
		1035	for (i = NUMPRI; i--; )
		1036	{
		1037	array_free (pending, [i]);
		1038	#if EV_IDLE_ENABLE
		1039	array_free (idle, [i]);
		1040	#endif
		1041	}
		1042
		1043	ev_free (anfds); anfdmax = 0;
		1044
		1045	/* have to use the microsoft-never-gets-it-right macro */
		1046	array_free (fdchange, EMPTY);
		1047	array_free (timer, EMPTY);
		1048	#if EV_PERIODIC_ENABLE
		1049	array_free (periodic, EMPTY);
		1050	#endif
		1051	#if EV_FORK_ENABLE
		1052	array_free (fork, EMPTY);
		1053	#endif
		1054	array_free (prepare, EMPTY);
		1055	array_free (check, EMPTY);
		1056
		1057	backend = 0;
		1058	}
		1059
		1060	void inline_size infy_fork (EV_P);
		1061
		1062	void inline_size
		1063	loop_fork (EV_P)
		1064	{
		1065	#if EV_USE_PORT
		1066	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1067	#endif
		1068	#if EV_USE_KQUEUE
		1069	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1070	#endif
		1071	#if EV_USE_EPOLL
		1072	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1073	#endif
		1074	#if EV_USE_INOTIFY
		1075	infy_fork (EV_A);
		1076	#endif
		1077
		1078	if (ev_is_active (&sigev))
		1079	{
		1080	/* default loop */
		1081
		1082	ev_ref (EV_A);
		1083	ev_io_stop (EV_A_ &sigev);
		1084	close (sigpipe [0]);
		1085	close (sigpipe [1]);
		1086
		1087	while (pipe (sigpipe))
		1088	syserr ("(libev) error creating pipe");
		1089
		1090	siginit (EV_A);
		1091	}
		1092
		1093	postfork = 0;
		1094	}
		1095
		1096	#if EV_MULTIPLICITY
		1097	struct ev_loop *
		1098	ev_loop_new (unsigned int flags)
		1099	{
		1100	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1101
		1102	memset (loop, 0, sizeof (struct ev_loop));
		1103
		1104	loop_init (EV_A_ flags);
		1105
		1106	if (ev_backend (EV_A))
		1107	return loop;
		1108
		1109	return 0;
		1110	}
		1111
		1112	void
		1113	ev_loop_destroy (EV_P)
		1114	{
		1115	loop_destroy (EV_A);
		1116	ev_free (loop);
		1117	}
		1118
		1119	void
		1120	ev_loop_fork (EV_P)
		1121	{
		1122	postfork = 1;
		1123	}
		1124
		1125	#endif
		1126
		1127	#if EV_MULTIPLICITY
		1128	struct ev_loop *
		1129	ev_default_loop_init (unsigned int flags)
		1130	#else
		1131	int
		1132	ev_default_loop (unsigned int flags)
		1133	#endif
		1134	{
		1135	if (sigpipe [0] == sigpipe [1])
		1136	if (pipe (sigpipe))
		1137	return 0;
		1138
		1139	if (!ev_default_loop_ptr)
		1140	{
		1141	#if EV_MULTIPLICITY
		1142	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1143	#else
		1144	ev_default_loop_ptr = 1;
		1145	#endif
		1146
		1147	loop_init (EV_A_ flags);
		1148
		1149	if (ev_backend (EV_A))
		1150	{
		1151	siginit (EV_A);
		1152
		1153	#ifndef _WIN32
		1154	ev_signal_init (&childev, childcb, SIGCHLD);
		1155	ev_set_priority (&childev, EV_MAXPRI);
		1156	ev_signal_start (EV_A_ &childev);
		1157	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1158	#endif
		1159	}
		1160	else
		1161	ev_default_loop_ptr = 0;
		1162	}
		1163
		1164	return ev_default_loop_ptr;
		1165	}
		1166
		1167	void
		1168	ev_default_destroy (void)
		1169	{
		1170	#if EV_MULTIPLICITY
		1171	struct ev_loop *loop = ev_default_loop_ptr;
		1172	#endif
		1173
		1174	#ifndef _WIN32
		1175	ev_ref (EV_A); /* child watcher */
		1176	ev_signal_stop (EV_A_ &childev);
		1177	#endif
		1178
		1179	ev_ref (EV_A); /* signal watcher */
		1180	ev_io_stop (EV_A_ &sigev);
		1181
		1182	close (sigpipe [0]); sigpipe [0] = 0;
		1183	close (sigpipe [1]); sigpipe [1] = 0;
		1184
		1185	loop_destroy (EV_A);
		1186	}
		1187
		1188	void
		1189	ev_default_fork (void)
		1190	{
		1191	#if EV_MULTIPLICITY
		1192	struct ev_loop *loop = ev_default_loop_ptr;
		1193	#endif
		1194
		1195	if (backend)
		1196	postfork = 1;
		1197	}
293		1198
294	/*****************************************************************************/	1199	/*****************************************************************************/
295		1200
296	#if HAVE_EPOLL	1201	void
297	# include "ev_epoll.c"	1202	ev_invoke (EV_P_ void *w, int revents)
298	#endif
299	#if HAVE_SELECT
300	# include "ev_select.c"
301	#endif
302
303	int ev_init (int flags)
304	{	1203	{
305	#if HAVE_MONOTONIC	1204	EV_CB_INVOKE ((W)w, revents);
306	{
307	struct timespec ts;
308	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
309	have_monotonic = 1;
310	}
311	#endif
312
313	ev_now = ev_time ();
314	now = get_clock ();
315	diff = ev_now - now;
316
317	if (pipe (sigpipe))
318	return 0;
319
320	ev_method = EVMETHOD_NONE;
321	#if HAVE_EPOLL
322	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
323	#endif
324	#if HAVE_SELECT
325	if (ev_method == EVMETHOD_NONE) select_init (flags);
326	#endif
327
328	if (ev_method)
329	{
330	evw_init (&sigev, sigcb, 0);
331	siginit ();
332	}
333
334	return ev_method;
335	}	1205	}
336		1206
337	/*****************************************************************************/	1207	void inline_speed
338		1208	call_pending (EV_P)
339	void ev_prefork (void)
340	{	1209	{
341	}
342
343	void ev_postfork_parent (void)
344	{
345	}
346
347	void ev_postfork_child (void)
348	{
349	#if HAVE_EPOLL
350	if (ev_method == EVMETHOD_EPOLL)
351	epoll_postfork_child ();
352	#endif
353
354	evio_stop (&sigev);
355	close (sigpipe [0]);
356	close (sigpipe [1]);
357	pipe (sigpipe);
358	siginit ();
359	}
360
361	/*****************************************************************************/
362
363	static void
364	fd_reify (void)
365	{
366	int i;	1210	int pri;
367		1211
368	for (i = 0; i < fdchangecnt; ++i)	1212	for (pri = NUMPRI; pri--; )
		1213	while (pendingcnt [pri])
369	{	1214	{
370	int fd = fdchanges [i];	1215	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
371	ANFD *anfd = anfds + fd;
372	struct ev_io *w;
373		1216
374	int wev = 0;	1217	if (expect_true (p->w))
375
376	for (w = anfd->head; w; w = w->next)
377	wev |= w->events;
378
379	if (anfd->wev != wev)
380	{	1218	{
381	method_modify (fd, anfd->wev, wev);	1219	/*assert (("non-pending watcher on pending list", p->w->pending));*/
382	anfd->wev = wev;
383	}
384	}
385		1220
386	fdchangecnt = 0;
387	}
388
389	static void
390	call_pending ()
391	{
392	int i;
393
394	for (i = 0; i < pendingcnt; ++i)
395	{
396	ANPENDING *p = pendings + i;
397
398	if (p->w)
399	{
400	p->w->pending = 0;	1221	p->w->pending = 0;
401	p->w->cb (p->w, p->events);	1222	EV_CB_INVOKE (p->w, p->events);
402	}	1223	}
403	}	1224	}
404
405	pendingcnt = 0;
406	}	1225	}
407		1226
408	static void	1227	void inline_size
409	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	1228	timers_reify (EV_P)
410	{	1229	{
411	while (timercnt && timers [0]->at <= now)	1230	while (timercnt && ((WT)timers [0])->at <= mn_now)
412	{	1231	{
413	struct ev_timer *w = timers [0];	1232	ev_timer *w = (ev_timer *)timers [0];
		1233
		1234	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
414		1235
415	/* first reschedule or stop timer */	1236	/* first reschedule or stop timer */
416	if (w->repeat)	1237	if (w->repeat)
417	{	1238	{
418	if (w->is_abs)	1239	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
419	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;	1240
420	else
421	w->at = now + w->repeat;	1241	((WT)w)->at += w->repeat;
422		1242	if (((WT)w)->at < mn_now)
423	assert (w->at > now);	1243	((WT)w)->at = mn_now;
424		1244
425	downheap (timers, timercnt, 0);	1245	downheap (timers, timercnt, 0);
426	}	1246	}
427	else	1247	else
		1248	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1249
		1250	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1251	}
		1252	}
		1253
		1254	#if EV_PERIODIC_ENABLE
		1255	void inline_size
		1256	periodics_reify (EV_P)
		1257	{
		1258	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
		1259	{
		1260	ev_periodic *w = (ev_periodic *)periodics [0];
		1261
		1262	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
		1263
		1264	/* first reschedule or stop timer */
		1265	if (w->reschedule_cb)
428	{	1266	{
429	evtimer_stop (w); /* nonrepeating: stop timer */	1267	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
430	--timercnt; /* maybe pass by reference instead? */	1268	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1269	downheap (periodics, periodiccnt, 0);
431	}	1270	}
		1271	else if (w->interval)
		1272	{
		1273	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1274	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
		1275	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1276	downheap (periodics, periodiccnt, 0);
		1277	}
		1278	else
		1279	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
432		1280
433	event ((W)w, EV_TIMEOUT);	1281	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
434	}	1282	}
435	}	1283	}
436		1284
437	static void	1285	static void noinline
438	time_update ()	1286	periodics_reschedule (EV_P)
439	{	1287	{
440	int i;	1288	int i;
441	ev_now = ev_time ();
442		1289
443	if (have_monotonic)	1290	/* adjust periodics after time jump */
		1291	for (i = 0; i < periodiccnt; ++i)
		1292	{
		1293	ev_periodic *w = (ev_periodic *)periodics [i];
		1294
		1295	if (w->reschedule_cb)
		1296	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1297	else if (w->interval)
		1298	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
444	{	1299	}
445	ev_tstamp odiff = diff;
446		1300
447	/* detecting time jumps is much more difficult */	1301	/* now rebuild the heap */
448	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1302	for (i = periodiccnt >> 1; i--; )
		1303	downheap (periodics, periodiccnt, i);
		1304	}
		1305	#endif
		1306
		1307	#if EV_IDLE_ENABLE
		1308	void inline_size
		1309	idle_reify (EV_P)
		1310	{
		1311	if (expect_false (idleall))
		1312	{
		1313	int pri;
		1314
		1315	for (pri = NUMPRI; pri--; )
449	{	1316	{
		1317	if (pendingcnt [pri])
		1318	break;
		1319
		1320	if (idlecnt [pri])
		1321	{
		1322	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1323	break;
		1324	}
		1325	}
		1326	}
		1327	}
		1328	#endif
		1329
		1330	void inline_speed
		1331	time_update (EV_P_ ev_tstamp max_block)
		1332	{
		1333	int i;
		1334
		1335	#if EV_USE_MONOTONIC
		1336	if (expect_true (have_monotonic))
		1337	{
		1338	ev_tstamp odiff = rtmn_diff;
		1339
450	now = get_clock ();	1340	mn_now = get_clock ();
		1341
		1342	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1343	/* interpolate in the meantime */
		1344	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1345	{
		1346	ev_rt_now = rtmn_diff + mn_now;
		1347	return;
		1348	}
		1349
		1350	now_floor = mn_now;
		1351	ev_rt_now = ev_time ();
		1352
		1353	/* loop a few times, before making important decisions.
		1354	* on the choice of "4": one iteration isn't enough,
		1355	* in case we get preempted during the calls to
		1356	* ev_time and get_clock. a second call is almost guaranteed
		1357	* to succeed in that case, though. and looping a few more times
		1358	* doesn't hurt either as we only do this on time-jumps or
		1359	* in the unlikely event of having been preempted here.
		1360	*/
		1361	for (i = 4; --i; )
		1362	{
451	diff = ev_now - now;	1363	rtmn_diff = ev_rt_now - mn_now;
452		1364
453	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1365	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
454	return; /* all is well */	1366	return; /* all is well */
455		1367
456	ev_now = ev_time ();	1368	ev_rt_now = ev_time ();
		1369	mn_now = get_clock ();
		1370	now_floor = mn_now;
457	}	1371	}
458		1372
459	/* time jump detected, reschedule atimers */	1373	# if EV_PERIODIC_ENABLE
460	for (i = 0; i < atimercnt; ++i)	1374	periodics_reschedule (EV_A);
		1375	# endif
		1376	/* no timer adjustment, as the monotonic clock doesn't jump */
		1377	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1378	}
		1379	else
		1380	#endif
		1381	{
		1382	ev_rt_now = ev_time ();
		1383
		1384	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
461	{	1385	{
462	struct ev_timer *w = atimers [i];	1386	#if EV_PERIODIC_ENABLE
463	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1387	periodics_reschedule (EV_A);
		1388	#endif
		1389	/* adjust timers. this is easy, as the offset is the same for all of them */
		1390	for (i = 0; i < timercnt; ++i)
		1391	((WT)timers [i])->at += ev_rt_now - mn_now;
464	}	1392	}
465	}
466	else
467	{
468	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
469	/* time jump detected, adjust rtimers */
470	for (i = 0; i < rtimercnt; ++i)
471	rtimers [i]->at += ev_now - now;
472		1393
473	now = ev_now;	1394	mn_now = ev_rt_now;
474	}
475	}
476
477	int ev_loop_done;
478
479	void ev_loop (int flags)
480	{
481	double block;
482	ev_loop_done = flags & EVLOOP_ONESHOT;
483
484	if (checkcnt)
485	{	1395	}
486	queue_events ((W *)checks, checkcnt, EV_CHECK);	1396	}
487	call_pending ();	1397
488	}	1398	void
		1399	ev_ref (EV_P)
		1400	{
		1401	++activecnt;
		1402	}
		1403
		1404	void
		1405	ev_unref (EV_P)
		1406	{
		1407	--activecnt;
		1408	}
		1409
		1410	static int loop_done;
		1411
		1412	void
		1413	ev_loop (EV_P_ int flags)
		1414	{
		1415	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1416	? EVUNLOOP_ONE
		1417	: EVUNLOOP_CANCEL;
		1418
		1419	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
489		1420
490	do	1421	do
491	{	1422	{
		1423	#ifndef _WIN32
		1424	if (expect_false (curpid)) /* penalise the forking check even more */
		1425	if (expect_false (getpid () != curpid))
		1426	{
		1427	curpid = getpid ();
		1428	postfork = 1;
		1429	}
		1430	#endif
		1431
		1432	#if EV_FORK_ENABLE
		1433	/* we might have forked, so queue fork handlers */
		1434	if (expect_false (postfork))
		1435	if (forkcnt)
		1436	{
		1437	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1438	call_pending (EV_A);
		1439	}
		1440	#endif
		1441
		1442	/* queue prepare watchers (and execute them) */
		1443	if (expect_false (preparecnt))
		1444	{
		1445	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1446	call_pending (EV_A);
		1447	}
		1448
		1449	if (expect_false (!activecnt))
		1450	break;
		1451
		1452	/* we might have forked, so reify kernel state if necessary */
		1453	if (expect_false (postfork))
		1454	loop_fork (EV_A);
		1455
492	/* update fd-related kernel structures */	1456	/* update fd-related kernel structures */
493	fd_reify ();	1457	fd_reify (EV_A);
494		1458
495	/* calculate blocking time */	1459	/* calculate blocking time */
496	if (flags & EVLOOP_NONBLOCK || idlecnt)	1460	{
497	block = 0.;	1461	ev_tstamp block;
		1462
		1463	if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))
		1464	block = 0.; /* do not block at all */
498	else	1465	else
499	{	1466	{
		1467	/* update time to cancel out callback processing overhead */
		1468	time_update (EV_A_ 1e100);
		1469
500	block = MAX_BLOCKTIME;	1470	block = MAX_BLOCKTIME;
501		1471
502	if (rtimercnt)	1472	if (timercnt)
503	{	1473	{
504	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1474	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
505	if (block > to) block = to;	1475	if (block > to) block = to;
506	}	1476	}
507		1477
		1478	#if EV_PERIODIC_ENABLE
508	if (atimercnt)	1479	if (periodiccnt)
509	{	1480	{
510	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1481	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
511	if (block > to) block = to;	1482	if (block > to) block = to;
512	}	1483	}
		1484	#endif
513		1485
514	if (block < 0.) block = 0.;	1486	if (expect_false (block < 0.)) block = 0.;
515	}	1487	}
516		1488
517	method_poll (block);	1489	++loop_count;
		1490	backend_poll (EV_A_ block);
518		1491
519	/* update ev_now, do magic */	1492	/* update ev_rt_now, do magic */
520	time_update ();	1493	time_update (EV_A_ block);
		1494	}
521		1495
522	/* queue pending timers and reschedule them */	1496	/* queue pending timers and reschedule them */
523	/* absolute timers first */	1497	timers_reify (EV_A); /* relative timers called last */
524	timers_reify (atimers, atimercnt, ev_now);	1498	#if EV_PERIODIC_ENABLE
525	/* relative timers second */	1499	periodics_reify (EV_A); /* absolute timers called first */
526	timers_reify (rtimers, rtimercnt, now);	1500	#endif
527		1501
		1502	#if EV_IDLE_ENABLE
528	/* queue idle watchers unless io or timers are pending */	1503	/* queue idle watchers unless other events are pending */
529	if (!pendingcnt)	1504	idle_reify (EV_A);
530	queue_events ((W *)idles, idlecnt, EV_IDLE);	1505	#endif
531		1506
532	/* queue check and possibly idle watchers */	1507	/* queue check watchers, to be executed first */
		1508	if (expect_false (checkcnt))
533	queue_events ((W *)checks, checkcnt, EV_CHECK);	1509	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
534		1510
535	call_pending ();	1511	call_pending (EV_A);
		1512
536	}	1513	}
537	while (!ev_loop_done);	1514	while (expect_true (activecnt && !loop_done));
		1515
		1516	if (loop_done == EVUNLOOP_ONE)
		1517	loop_done = EVUNLOOP_CANCEL;
		1518	}
		1519
		1520	void
		1521	ev_unloop (EV_P_ int how)
		1522	{
		1523	loop_done = how;
538	}	1524	}
539		1525
540	/*****************************************************************************/	1526	/*****************************************************************************/
541		1527
542	static void	1528	void inline_size
543	wlist_add (WL *head, WL elem)	1529	wlist_add (WL *head, WL elem)
544	{	1530	{
545	elem->next = *head;	1531	elem->next = *head;
546	*head = elem;	1532	*head = elem;
547	}	1533	}
548		1534
549	static void	1535	void inline_size
550	wlist_del (WL *head, WL elem)	1536	wlist_del (WL *head, WL elem)
551	{	1537	{
552	while (*head)	1538	while (*head)
553	{	1539	{
554	if (*head == elem)	1540	if (*head == elem)
…		…
559		1545
560	head = &(*head)->next;	1546	head = &(*head)->next;
561	}	1547	}
562	}	1548	}
563		1549
564	static void	1550	void inline_speed
		1551	clear_pending (EV_P_ W w)
		1552	{
		1553	if (w->pending)
		1554	{
		1555	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1556	w->pending = 0;
		1557	}
		1558	}
		1559
		1560	int
		1561	ev_clear_pending (EV_P_ void *w)
		1562	{
		1563	W w_ = (W)w;
		1564	int pending = w_->pending;
		1565
		1566	if (expect_true (pending))
		1567	{
		1568	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1569	w_->pending = 0;
		1570	p->w = 0;
		1571	return p->events;
		1572	}
		1573	else
		1574	return 0;
		1575	}
		1576
		1577	void inline_size
		1578	pri_adjust (EV_P_ W w)
		1579	{
		1580	int pri = w->priority;
		1581	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1582	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1583	w->priority = pri;
		1584	}
		1585
		1586	void inline_speed
565	ev_start (W w, int active)	1587	ev_start (EV_P_ W w, int active)
566	{	1588	{
567	w->pending = 0;	1589	pri_adjust (EV_A_ w);
568	w->active = active;	1590	w->active = active;
		1591	ev_ref (EV_A);
569	}	1592	}
570		1593
571	static void	1594	void inline_size
572	ev_stop (W w)	1595	ev_stop (EV_P_ W w)
573	{	1596	{
574	if (w->pending)	1597	ev_unref (EV_A);
575	pendings [w->pending - 1].w = 0;
576
577	w->active = 0;	1598	w->active = 0;
578	/* nop */
579	}	1599	}
580		1600
581	/*****************************************************************************/	1601	/*****************************************************************************/
582		1602
583	void	1603	void noinline
584	evio_start (struct ev_io *w)	1604	ev_io_start (EV_P_ ev_io *w)
		1605	{
		1606	int fd = w->fd;
		1607
		1608	if (expect_false (ev_is_active (w)))
		1609	return;
		1610
		1611	assert (("ev_io_start called with negative fd", fd >= 0));
		1612
		1613	ev_start (EV_A_ (W)w, 1);
		1614	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1615	wlist_add (&anfds[fd].head, (WL)w);
		1616
		1617	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
		1618	w->events &= ~EV_IOFDSET;
		1619	}
		1620
		1621	void noinline
		1622	ev_io_stop (EV_P_ ev_io *w)
		1623	{
		1624	clear_pending (EV_A_ (W)w);
		1625	if (expect_false (!ev_is_active (w)))
		1626	return;
		1627
		1628	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1629
		1630	wlist_del (&anfds[w->fd].head, (WL)w);
		1631	ev_stop (EV_A_ (W)w);
		1632
		1633	fd_change (EV_A_ w->fd, 1);
		1634	}
		1635
		1636	void noinline
		1637	ev_timer_start (EV_P_ ev_timer *w)
		1638	{
		1639	if (expect_false (ev_is_active (w)))
		1640	return;
		1641
		1642	((WT)w)->at += mn_now;
		1643
		1644	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1645
		1646	ev_start (EV_A_ (W)w, ++timercnt);
		1647	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
		1648	timers [timercnt - 1] = (WT)w;
		1649	upheap (timers, timercnt - 1);
		1650
		1651	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1652	}
		1653
		1654	void noinline
		1655	ev_timer_stop (EV_P_ ev_timer *w)
		1656	{
		1657	clear_pending (EV_A_ (W)w);
		1658	if (expect_false (!ev_is_active (w)))
		1659	return;
		1660
		1661	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1662
		1663	{
		1664	int active = ((W)w)->active;
		1665
		1666	if (expect_true (--active < --timercnt))
		1667	{
		1668	timers [active] = timers [timercnt];
		1669	adjustheap (timers, timercnt, active);
		1670	}
		1671	}
		1672
		1673	((WT)w)->at -= mn_now;
		1674
		1675	ev_stop (EV_A_ (W)w);
		1676	}
		1677
		1678	void noinline
		1679	ev_timer_again (EV_P_ ev_timer *w)
585	{	1680	{
586	if (ev_is_active (w))	1681	if (ev_is_active (w))
587	return;
588
589	int fd = w->fd;
590
591	ev_start ((W)w, 1);
592	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
593	wlist_add ((WL *)&anfds[fd].head, (WL)w);
594
595	++fdchangecnt;
596	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
597	fdchanges [fdchangecnt - 1] = fd;
598	}
599
600	void
601	evio_stop (struct ev_io *w)
602	{
603	if (!ev_is_active (w))
604	return;
605
606	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
607	ev_stop ((W)w);
608
609	++fdchangecnt;
610	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
611	fdchanges [fdchangecnt - 1] = w->fd;
612	}
613
614	void
615	evtimer_start (struct ev_timer *w)
616	{
617	if (ev_is_active (w))
618	return;
619
620	if (w->is_abs)
621	{	1682	{
622	/* this formula differs from the one in timer_reify becuse we do not round up */
623	if (w->repeat)	1683	if (w->repeat)
624	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1684	{
		1685	((WT)w)->at = mn_now + w->repeat;
		1686	adjustheap (timers, timercnt, ((W)w)->active - 1);
		1687	}
		1688	else
		1689	ev_timer_stop (EV_A_ w);
		1690	}
		1691	else if (w->repeat)
		1692	{
		1693	w->at = w->repeat;
		1694	ev_timer_start (EV_A_ w);
		1695	}
		1696	}
625		1697
626	ev_start ((W)w, ++atimercnt);	1698	#if EV_PERIODIC_ENABLE
627	array_needsize (atimers, atimermax, atimercnt, );	1699	void noinline
628	atimers [atimercnt - 1] = w;	1700	ev_periodic_start (EV_P_ ev_periodic *w)
629	upheap (atimers, atimercnt - 1);	1701	{
		1702	if (expect_false (ev_is_active (w)))
		1703	return;
		1704
		1705	if (w->reschedule_cb)
		1706	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1707	else if (w->interval)
		1708	{
		1709	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1710	/* this formula differs from the one in periodic_reify because we do not always round up */
		1711	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
630	}	1712	}
631	else	1713	else
632	{	1714	((WT)w)->at = w->offset;
633	w->at += now;
634		1715
635	ev_start ((W)w, ++rtimercnt);	1716	ev_start (EV_A_ (W)w, ++periodiccnt);
636	array_needsize (rtimers, rtimermax, rtimercnt, );	1717	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
637	rtimers [rtimercnt - 1] = w;	1718	periodics [periodiccnt - 1] = (WT)w;
638	upheap (rtimers, rtimercnt - 1);	1719	upheap (periodics, periodiccnt - 1);
639	}
640		1720
		1721	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
641	}	1722	}
642		1723
643	void	1724	void noinline
644	evtimer_stop (struct ev_timer *w)	1725	ev_periodic_stop (EV_P_ ev_periodic *w)
645	{	1726	{
		1727	clear_pending (EV_A_ (W)w);
646	if (!ev_is_active (w))	1728	if (expect_false (!ev_is_active (w)))
647	return;	1729	return;
648		1730
649	if (w->is_abs)	1731	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1732
650	{	1733	{
651	if (w->active < atimercnt--)	1734	int active = ((W)w)->active;
		1735
		1736	if (expect_true (--active < --periodiccnt))
652	{	1737	{
653	atimers [w->active - 1] = atimers [atimercnt];	1738	periodics [active] = periodics [periodiccnt];
654	downheap (atimers, atimercnt, w->active - 1);	1739	adjustheap (periodics, periodiccnt, active);
655	}	1740	}
656	}	1741	}
657	else
658	{
659	if (w->active < rtimercnt--)
660	{
661	rtimers [w->active - 1] = rtimers [rtimercnt];
662	downheap (rtimers, rtimercnt, w->active - 1);
663	}
664	}
665		1742
666	ev_stop ((W)w);	1743	ev_stop (EV_A_ (W)w);
667	}	1744	}
668		1745
669	void	1746	void noinline
		1747	ev_periodic_again (EV_P_ ev_periodic *w)
		1748	{
		1749	/* TODO: use adjustheap and recalculation */
		1750	ev_periodic_stop (EV_A_ w);
		1751	ev_periodic_start (EV_A_ w);
		1752	}
		1753	#endif
		1754
		1755	#ifndef SA_RESTART
		1756	# define SA_RESTART 0
		1757	#endif
		1758
		1759	void noinline
670	evsignal_start (struct ev_signal *w)	1760	ev_signal_start (EV_P_ ev_signal *w)
671	{	1761	{
		1762	#if EV_MULTIPLICITY
		1763	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1764	#endif
672	if (ev_is_active (w))	1765	if (expect_false (ev_is_active (w)))
673	return;	1766	return;
674		1767
675	ev_start ((W)w, 1);	1768	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1769
		1770	{
		1771	#ifndef _WIN32
		1772	sigset_t full, prev;
		1773	sigfillset (&full);
		1774	sigprocmask (SIG_SETMASK, &full, &prev);
		1775	#endif
		1776
676	array_needsize (signals, signalmax, w->signum, signals_init);	1777	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1778
		1779	#ifndef _WIN32
		1780	sigprocmask (SIG_SETMASK, &prev, 0);
		1781	#endif
		1782	}
		1783
		1784	ev_start (EV_A_ (W)w, 1);
677	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1785	wlist_add (&signals [w->signum - 1].head, (WL)w);
678		1786
679	if (!w->next)	1787	if (!((WL)w)->next)
680	{	1788	{
		1789	#if _WIN32
		1790	signal (w->signum, sighandler);
		1791	#else
681	struct sigaction sa;	1792	struct sigaction sa;
682	sa.sa_handler = sighandler;	1793	sa.sa_handler = sighandler;
683	sigfillset (&sa.sa_mask);	1794	sigfillset (&sa.sa_mask);
684	sa.sa_flags = 0;	1795	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
685	sigaction (w->signum, &sa, 0);	1796	sigaction (w->signum, &sa, 0);
		1797	#endif
686	}	1798	}
687	}	1799	}
688		1800
689	void	1801	void noinline
690	evsignal_stop (struct ev_signal *w)	1802	ev_signal_stop (EV_P_ ev_signal *w)
691	{	1803	{
		1804	clear_pending (EV_A_ (W)w);
692	if (!ev_is_active (w))	1805	if (expect_false (!ev_is_active (w)))
693	return;	1806	return;
694		1807
695	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1808	wlist_del (&signals [w->signum - 1].head, (WL)w);
696	ev_stop ((W)w);	1809	ev_stop (EV_A_ (W)w);
697		1810
698	if (!signals [w->signum - 1].head)	1811	if (!signals [w->signum - 1].head)
699	signal (w->signum, SIG_DFL);	1812	signal (w->signum, SIG_DFL);
700	}	1813	}
701		1814
702	void evidle_start (struct ev_idle *w)	1815	void
		1816	ev_child_start (EV_P_ ev_child *w)
703	{	1817	{
		1818	#if EV_MULTIPLICITY
		1819	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1820	#endif
704	if (ev_is_active (w))	1821	if (expect_false (ev_is_active (w)))
705	return;	1822	return;
706		1823
707	ev_start ((W)w, ++idlecnt);	1824	ev_start (EV_A_ (W)w, 1);
708	array_needsize (idles, idlemax, idlecnt, );	1825	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
709	idles [idlecnt - 1] = w;
710	}	1826	}
711		1827
712	void evidle_stop (struct ev_idle *w)	1828	void
		1829	ev_child_stop (EV_P_ ev_child *w)
713	{	1830	{
714	idles [w->active - 1] = idles [--idlecnt];	1831	clear_pending (EV_A_ (W)w);
		1832	if (expect_false (!ev_is_active (w)))
		1833	return;
		1834
		1835	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
715	ev_stop ((W)w);	1836	ev_stop (EV_A_ (W)w);
716	}	1837	}
717		1838
		1839	#if EV_STAT_ENABLE
		1840
		1841	# ifdef _WIN32
		1842	# undef lstat
		1843	# define lstat(a,b) _stati64 (a,b)
		1844	# endif
		1845
		1846	#define DEF_STAT_INTERVAL 5.0074891
		1847	#define MIN_STAT_INTERVAL 0.1074891
		1848
		1849	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1850
		1851	#if EV_USE_INOTIFY
		1852	# define EV_INOTIFY_BUFSIZE 8192
		1853
		1854	static void noinline
		1855	infy_add (EV_P_ ev_stat *w)
		1856	{
		1857	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);
		1858
		1859	if (w->wd < 0)
		1860	{
		1861	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1862
		1863	/* monitor some parent directory for speedup hints */
		1864	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1865	{
		1866	char path [4096];
		1867	strcpy (path, w->path);
		1868
		1869	do
		1870	{
		1871	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1872	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1873
		1874	char *pend = strrchr (path, '/');
		1875
		1876	if (!pend)
		1877	break; /* whoops, no '/', complain to your admin */
		1878
		1879	*pend = 0;
		1880	w->wd = inotify_add_watch (fs_fd, path, mask);
		1881	}
		1882	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1883	}
		1884	}
		1885	else
		1886	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1887
		1888	if (w->wd >= 0)
		1889	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1890	}
		1891
		1892	static void noinline
		1893	infy_del (EV_P_ ev_stat *w)
		1894	{
		1895	int slot;
		1896	int wd = w->wd;
		1897
		1898	if (wd < 0)
		1899	return;
		1900
		1901	w->wd = -2;
		1902	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1903	wlist_del (&fs_hash [slot].head, (WL)w);
		1904
		1905	/* remove this watcher, if others are watching it, they will rearm */
		1906	inotify_rm_watch (fs_fd, wd);
		1907	}
		1908
		1909	static void noinline
		1910	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1911	{
		1912	if (slot < 0)
		1913	/* overflow, need to check for all hahs slots */
		1914	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1915	infy_wd (EV_A_ slot, wd, ev);
		1916	else
		1917	{
		1918	WL w_;
		1919
		1920	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1921	{
		1922	ev_stat *w = (ev_stat *)w_;
		1923	w_ = w_->next; /* lets us remove this watcher and all before it */
		1924
		1925	if (w->wd == wd || wd == -1)
		1926	{
		1927	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		1928	{
		1929	w->wd = -1;
		1930	infy_add (EV_A_ w); /* re-add, no matter what */
		1931	}
		1932
		1933	stat_timer_cb (EV_A_ &w->timer, 0);
		1934	}
		1935	}
		1936	}
		1937	}
		1938
		1939	static void
		1940	infy_cb (EV_P_ ev_io *w, int revents)
		1941	{
		1942	char buf [EV_INOTIFY_BUFSIZE];
		1943	struct inotify_event *ev = (struct inotify_event *)buf;
		1944	int ofs;
		1945	int len = read (fs_fd, buf, sizeof (buf));
		1946
		1947	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1948	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1949	}
		1950
		1951	void inline_size
		1952	infy_init (EV_P)
		1953	{
		1954	if (fs_fd != -2)
		1955	return;
		1956
		1957	fs_fd = inotify_init ();
		1958
		1959	if (fs_fd >= 0)
		1960	{
		1961	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1962	ev_set_priority (&fs_w, EV_MAXPRI);
		1963	ev_io_start (EV_A_ &fs_w);
		1964	}
		1965	}
		1966
		1967	void inline_size
		1968	infy_fork (EV_P)
		1969	{
		1970	int slot;
		1971
		1972	if (fs_fd < 0)
		1973	return;
		1974
		1975	close (fs_fd);
		1976	fs_fd = inotify_init ();
		1977
		1978	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1979	{
		1980	WL w_ = fs_hash [slot].head;
		1981	fs_hash [slot].head = 0;
		1982
		1983	while (w_)
		1984	{
		1985	ev_stat *w = (ev_stat *)w_;
		1986	w_ = w_->next; /* lets us add this watcher */
		1987
		1988	w->wd = -1;
		1989
		1990	if (fs_fd >= 0)
		1991	infy_add (EV_A_ w); /* re-add, no matter what */
		1992	else
		1993	ev_timer_start (EV_A_ &w->timer);
		1994	}
		1995
		1996	}
		1997	}
		1998
		1999	#endif
		2000
		2001	void
		2002	ev_stat_stat (EV_P_ ev_stat *w)
		2003	{
		2004	if (lstat (w->path, &w->attr) < 0)
		2005	w->attr.st_nlink = 0;
		2006	else if (!w->attr.st_nlink)
		2007	w->attr.st_nlink = 1;
		2008	}
		2009
		2010	static void noinline
		2011	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2012	{
		2013	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2014
		2015	/* we copy this here each the time so that */
		2016	/* prev has the old value when the callback gets invoked */
		2017	w->prev = w->attr;
		2018	ev_stat_stat (EV_A_ w);
		2019
		2020	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2021	if (
		2022	w->prev.st_dev != w->attr.st_dev
		2023	|| w->prev.st_ino != w->attr.st_ino
		2024	|| w->prev.st_mode != w->attr.st_mode
		2025	|| w->prev.st_nlink != w->attr.st_nlink
		2026	|| w->prev.st_uid != w->attr.st_uid
		2027	|| w->prev.st_gid != w->attr.st_gid
		2028	|| w->prev.st_rdev != w->attr.st_rdev
		2029	|| w->prev.st_size != w->attr.st_size
		2030	|| w->prev.st_atime != w->attr.st_atime
		2031	|| w->prev.st_mtime != w->attr.st_mtime
		2032	|| w->prev.st_ctime != w->attr.st_ctime
		2033	) {
		2034	#if EV_USE_INOTIFY
		2035	infy_del (EV_A_ w);
		2036	infy_add (EV_A_ w);
		2037	ev_stat_stat (EV_A_ w); /* avoid race... */
		2038	#endif
		2039
		2040	ev_feed_event (EV_A_ w, EV_STAT);
		2041	}
		2042	}
		2043
		2044	void
		2045	ev_stat_start (EV_P_ ev_stat *w)
		2046	{
		2047	if (expect_false (ev_is_active (w)))
		2048	return;
		2049
		2050	/* since we use memcmp, we need to clear any padding data etc. */
		2051	memset (&w->prev, 0, sizeof (ev_statdata));
		2052	memset (&w->attr, 0, sizeof (ev_statdata));
		2053
		2054	ev_stat_stat (EV_A_ w);
		2055
		2056	if (w->interval < MIN_STAT_INTERVAL)
		2057	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2058
		2059	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2060	ev_set_priority (&w->timer, ev_priority (w));
		2061
		2062	#if EV_USE_INOTIFY
		2063	infy_init (EV_A);
		2064
		2065	if (fs_fd >= 0)
		2066	infy_add (EV_A_ w);
		2067	else
		2068	#endif
		2069	ev_timer_start (EV_A_ &w->timer);
		2070
		2071	ev_start (EV_A_ (W)w, 1);
		2072	}
		2073
		2074	void
		2075	ev_stat_stop (EV_P_ ev_stat *w)
		2076	{
		2077	clear_pending (EV_A_ (W)w);
		2078	if (expect_false (!ev_is_active (w)))
		2079	return;
		2080
		2081	#if EV_USE_INOTIFY
		2082	infy_del (EV_A_ w);
		2083	#endif
		2084	ev_timer_stop (EV_A_ &w->timer);
		2085
		2086	ev_stop (EV_A_ (W)w);
		2087	}
		2088	#endif
		2089
		2090	#if EV_IDLE_ENABLE
		2091	void
		2092	ev_idle_start (EV_P_ ev_idle *w)
		2093	{
		2094	if (expect_false (ev_is_active (w)))
		2095	return;
		2096
		2097	pri_adjust (EV_A_ (W)w);
		2098
		2099	{
		2100	int active = ++idlecnt [ABSPRI (w)];
		2101
		2102	++idleall;
		2103	ev_start (EV_A_ (W)w, active);
		2104
		2105	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2106	idles [ABSPRI (w)][active - 1] = w;
		2107	}
		2108	}
		2109
		2110	void
		2111	ev_idle_stop (EV_P_ ev_idle *w)
		2112	{
		2113	clear_pending (EV_A_ (W)w);
		2114	if (expect_false (!ev_is_active (w)))
		2115	return;
		2116
		2117	{
		2118	int active = ((W)w)->active;
		2119
		2120	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2121	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2122
		2123	ev_stop (EV_A_ (W)w);
		2124	--idleall;
		2125	}
		2126	}
		2127	#endif
		2128
		2129	void
		2130	ev_prepare_start (EV_P_ ev_prepare *w)
		2131	{
		2132	if (expect_false (ev_is_active (w)))
		2133	return;
		2134
		2135	ev_start (EV_A_ (W)w, ++preparecnt);
		2136	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2137	prepares [preparecnt - 1] = w;
		2138	}
		2139
		2140	void
		2141	ev_prepare_stop (EV_P_ ev_prepare *w)
		2142	{
		2143	clear_pending (EV_A_ (W)w);
		2144	if (expect_false (!ev_is_active (w)))
		2145	return;
		2146
		2147	{
		2148	int active = ((W)w)->active;
		2149	prepares [active - 1] = prepares [--preparecnt];
		2150	((W)prepares [active - 1])->active = active;
		2151	}
		2152
		2153	ev_stop (EV_A_ (W)w);
		2154	}
		2155
		2156	void
718	void evcheck_start (struct ev_check *w)	2157	ev_check_start (EV_P_ ev_check *w)
719	{	2158	{
720	if (ev_is_active (w))	2159	if (expect_false (ev_is_active (w)))
721	return;	2160	return;
722		2161
723	ev_start ((W)w, ++checkcnt);	2162	ev_start (EV_A_ (W)w, ++checkcnt);
724	array_needsize (checks, checkmax, checkcnt, );	2163	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
725	checks [checkcnt - 1] = w;	2164	checks [checkcnt - 1] = w;
726	}	2165	}
727		2166
		2167	void
728	void evcheck_stop (struct ev_check *w)	2168	ev_check_stop (EV_P_ ev_check *w)
729	{	2169	{
		2170	clear_pending (EV_A_ (W)w);
		2171	if (expect_false (!ev_is_active (w)))
		2172	return;
		2173
		2174	{
		2175	int active = ((W)w)->active;
730	checks [w->active - 1] = checks [--checkcnt];	2176	checks [active - 1] = checks [--checkcnt];
		2177	((W)checks [active - 1])->active = active;
		2178	}
		2179
731	ev_stop ((W)w);	2180	ev_stop (EV_A_ (W)w);
732	}	2181	}
		2182
		2183	#if EV_EMBED_ENABLE
		2184	void noinline
		2185	ev_embed_sweep (EV_P_ ev_embed *w)
		2186	{
		2187	ev_loop (w->other, EVLOOP_NONBLOCK);
		2188	}
		2189
		2190	static void
		2191	embed_io_cb (EV_P_ ev_io *io, int revents)
		2192	{
		2193	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2194
		2195	if (ev_cb (w))
		2196	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2197	else
		2198	ev_embed_sweep (loop, w);
		2199	}
		2200
		2201	static void
		2202	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2203	{
		2204	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2205
		2206	fd_reify (w->other);
		2207	}
		2208
		2209	void
		2210	ev_embed_start (EV_P_ ev_embed *w)
		2211	{
		2212	if (expect_false (ev_is_active (w)))
		2213	return;
		2214
		2215	{
		2216	struct ev_loop *loop = w->other;
		2217	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2218	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_WRITE);
		2219	}
		2220
		2221	ev_set_priority (&w->io, ev_priority (w));
		2222	ev_io_start (EV_A_ &w->io);
		2223
		2224	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2225	ev_set_priority (&w->prepare, EV_MINPRI);
		2226	ev_prepare_start (EV_A_ &w->prepare);
		2227
		2228	ev_start (EV_A_ (W)w, 1);
		2229	}
		2230
		2231	void
		2232	ev_embed_stop (EV_P_ ev_embed *w)
		2233	{
		2234	clear_pending (EV_A_ (W)w);
		2235	if (expect_false (!ev_is_active (w)))
		2236	return;
		2237
		2238	ev_io_stop (EV_A_ &w->io);
		2239	ev_prepare_stop (EV_A_ &w->prepare);
		2240
		2241	ev_stop (EV_A_ (W)w);
		2242	}
		2243	#endif
		2244
		2245	#if EV_FORK_ENABLE
		2246	void
		2247	ev_fork_start (EV_P_ ev_fork *w)
		2248	{
		2249	if (expect_false (ev_is_active (w)))
		2250	return;
		2251
		2252	ev_start (EV_A_ (W)w, ++forkcnt);
		2253	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2254	forks [forkcnt - 1] = w;
		2255	}
		2256
		2257	void
		2258	ev_fork_stop (EV_P_ ev_fork *w)
		2259	{
		2260	clear_pending (EV_A_ (W)w);
		2261	if (expect_false (!ev_is_active (w)))
		2262	return;
		2263
		2264	{
		2265	int active = ((W)w)->active;
		2266	forks [active - 1] = forks [--forkcnt];
		2267	((W)forks [active - 1])->active = active;
		2268	}
		2269
		2270	ev_stop (EV_A_ (W)w);
		2271	}
		2272	#endif
733		2273
734	/*****************************************************************************/	2274	/*****************************************************************************/
735		2275
736	#if 0	2276	struct ev_once
		2277	{
		2278	ev_io io;
		2279	ev_timer to;
		2280	void (*cb)(int revents, void *arg);
		2281	void *arg;
		2282	};
737		2283
738	static void	2284	static void
739	sin_cb (struct ev_io *w, int revents)	2285	once_cb (EV_P_ struct ev_once *once, int revents)
740	{	2286	{
741	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2287	void (*cb)(int revents, void *arg) = once->cb;
		2288	void *arg = once->arg;
		2289
		2290	ev_io_stop (EV_A_ &once->io);
		2291	ev_timer_stop (EV_A_ &once->to);
		2292	ev_free (once);
		2293
		2294	cb (revents, arg);
742	}	2295	}
743		2296
744	static void	2297	static void
745	ocb (struct ev_timer *w, int revents)	2298	once_cb_io (EV_P_ ev_io *w, int revents)
746	{	2299	{
747	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2300	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
748	evtimer_stop (w);
749	evtimer_start (w);
750	}	2301	}
751		2302
752	static void	2303	static void
753	scb (struct ev_signal *w, int revents)	2304	once_cb_to (EV_P_ ev_timer *w, int revents)
754	{	2305	{
755	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	2306	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
756	}	2307	}
757		2308
758	static void	2309	void
759	gcb (struct ev_signal *w, int revents)	2310	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
760	{	2311	{
761	fprintf (stderr, "generic %x\n", revents);	2312	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
762	}
763		2313
764	int main (void)	2314	if (expect_false (!once))
765	{
766	struct ev_io sin;
767
768	ev_init (0);
769
770	evw_init (&sin, sin_cb, 55);
771	evio_set (&sin, 0, EV_READ);
772	evio_start (&sin);
773
774	struct ev_timer t[10000];
775
776	#if 0
777	int i;
778	for (i = 0; i < 10000; ++i)
779	{
780	struct ev_timer *w = t + i;
781	evw_init (w, ocb, i);
782	evtimer_set_abs (w, drand48 (), 0.99775533);
783	evtimer_start (w);
784	if (drand48 () < 0.5)
785	evtimer_stop (w);
786	}	2315	{
787	#endif	2316	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
788
789	struct ev_timer t1;
790	evw_init (&t1, ocb, 0);
791	evtimer_set_abs (&t1, 5, 10);
792	evtimer_start (&t1);
793
794	struct ev_signal sig;
795	evw_init (&sig, scb, 65535);
796	evsignal_set (&sig, SIGQUIT);
797	evsignal_start (&sig);
798
799	struct ev_check cw;
800	evw_init (&cw, gcb, 0);
801	evcheck_start (&cw);
802
803	struct ev_idle iw;
804	evw_init (&iw, gcb, 0);
805	evidle_start (&iw);
806
807	ev_loop (0);
808
809	return 0;	2317	return;
810	}	2318	}
811		2319
812	#endif	2320	once->cb = cb;
		2321	once->arg = arg;
813		2322
		2323	ev_init (&once->io, once_cb_io);
		2324	if (fd >= 0)
		2325	{
		2326	ev_io_set (&once->io, fd, events);
		2327	ev_io_start (EV_A_ &once->io);
		2328	}
814		2329
		2330	ev_init (&once->to, once_cb_to);
		2331	if (timeout >= 0.)
		2332	{
		2333	ev_timer_set (&once->to, timeout, 0.);
		2334	ev_timer_start (EV_A_ &once->to);
		2335	}
		2336	}
815		2337
		2338	#if EV_MULTIPLICITY
		2339	#include "ev_wrap.h"
		2340	#endif
816		2341
		2342	#ifdef __cplusplus
		2343	}
		2344	#endif
		2345

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