[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC vs.
Revision 1.244 by root, Tue May 20 23:49:41 2008 UTC

…		…
		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without modifica-
		8	* tion, are permitted provided that the following conditions are met:
		9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*
		28	* Alternatively, the contents of this file may be used under the terms of
		29	* the GNU General Public License ("GPL") version 2 or any later version,
		30	* in which case the provisions of the GPL are applicable instead of
		31	* the above. If you wish to allow the use of your version of this file
		32	* only under the terms of the GPL and not to allow others to use your
		33	* version of this file under the BSD license, indicate your decision
		34	* by deleting the provisions above and replace them with the notice
		35	* and other provisions required by the GPL. If you do not delete the
		36	* provisions above, a recipient may use your version of this file under
		37	* either the BSD or the GPL.
		38	*/
		39
		40	#ifdef __cplusplus
		41	extern "C" {
		42	#endif
		43
		44	/* this big block deduces configuration from config.h */
		45	#ifndef EV_STANDALONE
		46	# ifdef EV_CONFIG_H
		47	# include EV_CONFIG_H
		48	# else
		49	# include "config.h"
		50	# endif
		51
		52	# if HAVE_CLOCK_GETTIME
		53	# ifndef EV_USE_MONOTONIC
		54	# define EV_USE_MONOTONIC 1
		55	# endif
		56	# ifndef EV_USE_REALTIME
		57	# define EV_USE_REALTIME 1
		58	# endif
		59	# else
		60	# ifndef EV_USE_MONOTONIC
		61	# define EV_USE_MONOTONIC 0
		62	# endif
		63	# ifndef EV_USE_REALTIME
		64	# define EV_USE_REALTIME 0
		65	# endif
		66	# endif
		67
		68	# ifndef EV_USE_NANOSLEEP
		69	# if HAVE_NANOSLEEP
		70	# define EV_USE_NANOSLEEP 1
		71	# else
		72	# define EV_USE_NANOSLEEP 0
		73	# endif
		74	# endif
		75
		76	# ifndef EV_USE_SELECT
		77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		78	# define EV_USE_SELECT 1
		79	# else
		80	# define EV_USE_SELECT 0
		81	# endif
		82	# endif
		83
		84	# ifndef EV_USE_POLL
		85	# if HAVE_POLL && HAVE_POLL_H
		86	# define EV_USE_POLL 1
		87	# else
		88	# define EV_USE_POLL 0
		89	# endif
		90	# endif
		91
		92	# ifndef EV_USE_EPOLL
		93	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		94	# define EV_USE_EPOLL 1
		95	# else
		96	# define EV_USE_EPOLL 0
		97	# endif
		98	# endif
		99
		100	# ifndef EV_USE_KQUEUE
		101	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		102	# define EV_USE_KQUEUE 1
		103	# else
		104	# define EV_USE_KQUEUE 0
		105	# endif
		106	# endif
		107
		108	# ifndef EV_USE_PORT
		109	# if HAVE_PORT_H && HAVE_PORT_CREATE
		110	# define EV_USE_PORT 1
		111	# else
		112	# define EV_USE_PORT 0
		113	# endif
		114	# endif
		115
		116	# ifndef EV_USE_INOTIFY
		117	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		118	# define EV_USE_INOTIFY 1
		119	# else
		120	# define EV_USE_INOTIFY 0
		121	# endif
		122	# endif
		123
		124	# ifndef EV_USE_EVENTFD
		125	# if HAVE_EVENTFD
		126	# define EV_USE_EVENTFD 1
		127	# else
		128	# define EV_USE_EVENTFD 0
		129	# endif
		130	# endif
		131
		132	#endif
		133
1	#include <math.h>	134	#include <math.h>
2	#include <stdlib.h>	135	#include <stdlib.h>
3	#include <unistd.h>
4	#include <fcntl.h>	136	#include <fcntl.h>
5	#include <signal.h>
6	#include <stddef.h>	137	#include <stddef.h>
7		138
8	#include <stdio.h>	139	#include <stdio.h>
9		140
10	#include <assert.h>	141	#include <assert.h>
11	#include <errno.h>	142	#include <errno.h>
12	#include <sys/time.h>	143	#include <sys/types.h>
13	#include <time.h>	144	#include <time.h>
14		145
15	#define HAVE_EPOLL 1	146	#include <signal.h>
16		147
17	#ifndef HAVE_MONOTONIC	148	#ifdef EV_H
18	# ifdef CLOCK_MONOTONIC	149	# include EV_H
19	# define HAVE_MONOTONIC 1	150	#else
		151	# include "ev.h"
		152	#endif
		153
		154	#ifndef _WIN32
		155	# include <sys/time.h>
		156	# include <sys/wait.h>
		157	# include <unistd.h>
		158	#else
		159	# define WIN32_LEAN_AND_MEAN
		160	# include <windows.h>
		161	# ifndef EV_SELECT_IS_WINSOCKET
		162	# define EV_SELECT_IS_WINSOCKET 1
20	# endif	163	# endif
21	#endif	164	#endif
22		165
		166	/* this block tries to deduce configuration from header-defined symbols and defaults */
		167
		168	#ifndef EV_USE_MONOTONIC
		169	# define EV_USE_MONOTONIC 0
		170	#endif
		171
		172	#ifndef EV_USE_REALTIME
		173	# define EV_USE_REALTIME 0
		174	#endif
		175
		176	#ifndef EV_USE_NANOSLEEP
		177	# define EV_USE_NANOSLEEP 0
		178	#endif
		179
23	#ifndef HAVE_SELECT	180	#ifndef EV_USE_SELECT
24	# define HAVE_SELECT 1	181	# define EV_USE_SELECT 1
		182	#endif
		183
		184	#ifndef EV_USE_POLL
		185	# ifdef _WIN32
		186	# define EV_USE_POLL 0
		187	# else
		188	# define EV_USE_POLL 1
25	#endif	189	# endif
		190	#endif
26		191
27	#ifndef HAVE_EPOLL	192	#ifndef EV_USE_EPOLL
		193	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		194	# define EV_USE_EPOLL 1
		195	# else
28	# define HAVE_EPOLL 0	196	# define EV_USE_EPOLL 0
29	#endif	197	# endif
		198	#endif
30		199
31	#ifndef HAVE_REALTIME	200	#ifndef EV_USE_KQUEUE
32	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	201	# define EV_USE_KQUEUE 0
		202	#endif
		203
		204	#ifndef EV_USE_PORT
		205	# define EV_USE_PORT 0
		206	#endif
		207
		208	#ifndef EV_USE_INOTIFY
		209	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		210	# define EV_USE_INOTIFY 1
		211	# else
		212	# define EV_USE_INOTIFY 0
33	#endif	213	# endif
		214	#endif
		215
		216	#ifndef EV_PID_HASHSIZE
		217	# if EV_MINIMAL
		218	# define EV_PID_HASHSIZE 1
		219	# else
		220	# define EV_PID_HASHSIZE 16
		221	# endif
		222	#endif
		223
		224	#ifndef EV_INOTIFY_HASHSIZE
		225	# if EV_MINIMAL
		226	# define EV_INOTIFY_HASHSIZE 1
		227	# else
		228	# define EV_INOTIFY_HASHSIZE 16
		229	# endif
		230	#endif
		231
		232	#ifndef EV_USE_EVENTFD
		233	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		234	# define EV_USE_EVENTFD 1
		235	# else
		236	# define EV_USE_EVENTFD 0
		237	# endif
		238	#endif
		239
		240	#ifndef EV_USE_4HEAP
		241	# define EV_USE_4HEAP !EV_MINIMAL
		242	#endif
		243
		244	#ifndef EV_HEAP_CACHE_AT
		245	# define EV_HEAP_CACHE_AT !EV_MINIMAL
		246	#endif
		247
		248	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
		249
		250	#ifndef CLOCK_MONOTONIC
		251	# undef EV_USE_MONOTONIC
		252	# define EV_USE_MONOTONIC 0
		253	#endif
		254
		255	#ifndef CLOCK_REALTIME
		256	# undef EV_USE_REALTIME
		257	# define EV_USE_REALTIME 0
		258	#endif
		259
		260	#if !EV_STAT_ENABLE
		261	# undef EV_USE_INOTIFY
		262	# define EV_USE_INOTIFY 0
		263	#endif
		264
		265	#if !EV_USE_NANOSLEEP
		266	# ifndef _WIN32
		267	# include <sys/select.h>
		268	# endif
		269	#endif
		270
		271	#if EV_USE_INOTIFY
		272	# include <sys/inotify.h>
		273	#endif
		274
		275	#if EV_SELECT_IS_WINSOCKET
		276	# include <winsock.h>
		277	#endif
		278
		279	#if EV_USE_EVENTFD
		280	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		281	# include <stdint.h>
		282	# ifdef __cplusplus
		283	extern "C" {
		284	# endif
		285	int eventfd (unsigned int initval, int flags);
		286	# ifdef __cplusplus
		287	}
		288	# endif
		289	#endif
		290
		291	/**/
		292
		293	/*
		294	* This is used to avoid floating point rounding problems.
		295	* It is added to ev_rt_now when scheduling periodics
		296	* to ensure progress, time-wise, even when rounding
		297	* errors are against us.
		298	* This value is good at least till the year 4000.
		299	* Better solutions welcome.
		300	*/
		301	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
34		302
35	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	303	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
36	#define MAX_BLOCKTIME 60.	304	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		305	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds, TODO */
37		306
38	#include "ev.h"	307	#if __GNUC__ >= 4
		308	# define expect(expr,value) __builtin_expect ((expr),(value))
		309	# define noinline __attribute__ ((noinline))
		310	#else
		311	# define expect(expr,value) (expr)
		312	# define noinline
		313	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		314	# define inline
		315	# endif
		316	#endif
39		317
		318	#define expect_false(expr) expect ((expr) != 0, 0)
		319	#define expect_true(expr) expect ((expr) != 0, 1)
		320	#define inline_size static inline
		321
		322	#if EV_MINIMAL
		323	# define inline_speed static noinline
		324	#else
		325	# define inline_speed static inline
		326	#endif
		327
		328	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		329	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		330
		331	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		332	#define EMPTY2(a,b) /* used to suppress some warnings */
		333
40	typedef struct ev_watcher *W;	334	typedef ev_watcher *W;
41	typedef struct ev_watcher_list *WL;	335	typedef ev_watcher_list *WL;
42	typedef struct ev_watcher_time *WT;	336	typedef ev_watcher_time *WT;
43		337
44	static ev_tstamp now, diff; /* monotonic clock */	338	#define ev_active(w) ((W)(w))->active
		339	#define ev_at(w) ((WT)(w))->at
		340
		341	#if EV_USE_MONOTONIC
		342	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		343	/* giving it a reasonably high chance of working on typical architetcures */
		344	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		345	#endif
		346
		347	#ifdef _WIN32
		348	# include "ev_win32.c"
		349	#endif
		350
		351	/*****************************************************************************/
		352
		353	static void (syserr_cb)(const char msg);
		354
		355	void
		356	ev_set_syserr_cb (void (cb)(const char msg))
		357	{
		358	syserr_cb = cb;
		359	}
		360
		361	static void noinline
		362	syserr (const char *msg)
		363	{
		364	if (!msg)
		365	msg = "(libev) system error";
		366
		367	if (syserr_cb)
		368	syserr_cb (msg);
		369	else
		370	{
		371	perror (msg);
		372	abort ();
		373	}
		374	}
		375
		376	static void *
		377	ev_realloc_emul (void *ptr, long size)
		378	{
		379	/* some systems, notably openbsd and darwin, fail to properly
		380	* implement realloc (x, 0) (as required by both ansi c-98 and
		381	* the single unix specification, so work around them here.
		382	*/
		383
		384	if (size)
		385	return realloc (ptr, size);
		386
		387	free (ptr);
		388	return 0;
		389	}
		390
		391	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
		392
		393	void
		394	ev_set_allocator (void (cb)(void *ptr, long size))
		395	{
		396	alloc = cb;
		397	}
		398
		399	inline_speed void *
		400	ev_realloc (void *ptr, long size)
		401	{
		402	ptr = alloc (ptr, size);
		403
		404	if (!ptr && size)
		405	{
		406	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		407	abort ();
		408	}
		409
		410	return ptr;
		411	}
		412
		413	#define ev_malloc(size) ev_realloc (0, (size))
		414	#define ev_free(ptr) ev_realloc ((ptr), 0)
		415
		416	/*****************************************************************************/
		417
		418	typedef struct
		419	{
		420	WL head;
		421	unsigned char events;
		422	unsigned char reify;
		423	#if EV_SELECT_IS_WINSOCKET
		424	SOCKET handle;
		425	#endif
		426	} ANFD;
		427
		428	typedef struct
		429	{
		430	W w;
		431	int events;
		432	} ANPENDING;
		433
		434	#if EV_USE_INOTIFY
		435	/* hash table entry per inotify-id */
		436	typedef struct
		437	{
		438	WL head;
		439	} ANFS;
		440	#endif
		441
		442	/* Heap Entry */
		443	#if EV_HEAP_CACHE_AT
		444	typedef struct {
		445	ev_tstamp at;
		446	WT w;
		447	} ANHE;
		448
		449	#define ANHE_w(he) (he).w /* access watcher, read-write */
		450	#define ANHE_at(he) (he).at /* access cached at, read-only */
		451	#define ANHE_at_set(he) (he).at = (he).w->at /* update at from watcher */
		452	#else
		453	typedef WT ANHE;
		454
		455	#define ANHE_w(he) (he)
		456	#define ANHE_at(he) (he)->at
		457	#define ANHE_at_set(he)
		458	#endif
		459
		460	#if EV_MULTIPLICITY
		461
		462	struct ev_loop
		463	{
		464	ev_tstamp ev_rt_now;
		465	#define ev_rt_now ((loop)->ev_rt_now)
		466	#define VAR(name,decl) decl;
		467	#include "ev_vars.h"
		468	#undef VAR
		469	};
		470	#include "ev_wrap.h"
		471
		472	static struct ev_loop default_loop_struct;
		473	struct ev_loop *ev_default_loop_ptr;
		474
		475	#else
		476
45	ev_tstamp ev_now;	477	ev_tstamp ev_rt_now;
46	int ev_method;	478	#define VAR(name,decl) static decl;
		479	#include "ev_vars.h"
		480	#undef VAR
47		481
48	static int have_monotonic; /* runtime */	482	static int ev_default_loop_ptr;
49		483
50	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	484	#endif
51	static void (*method_modify)(int fd, int oev, int nev);
52	static void (*method_poll)(ev_tstamp timeout);
53		485
54	/*****************************************************************************/	486	/*****************************************************************************/
55		487
56	ev_tstamp	488	ev_tstamp
57	ev_time (void)	489	ev_time (void)
58	{	490	{
59	#if HAVE_REALTIME	491	#if EV_USE_REALTIME
60	struct timespec ts;	492	struct timespec ts;
61	clock_gettime (CLOCK_REALTIME, &ts);	493	clock_gettime (CLOCK_REALTIME, &ts);
62	return ts.tv_sec + ts.tv_nsec * 1e-9;	494	return ts.tv_sec + ts.tv_nsec * 1e-9;
63	#else	495	#else
64	struct timeval tv;	496	struct timeval tv;
65	gettimeofday (&tv, 0);	497	gettimeofday (&tv, 0);
66	return tv.tv_sec + tv.tv_usec * 1e-6;	498	return tv.tv_sec + tv.tv_usec * 1e-6;
67	#endif	499	#endif
68	}	500	}
69		501
70	static ev_tstamp	502	ev_tstamp inline_size
71	get_clock (void)	503	get_clock (void)
72	{	504	{
73	#if HAVE_MONOTONIC	505	#if EV_USE_MONOTONIC
74	if (have_monotonic)	506	if (expect_true (have_monotonic))
75	{	507	{
76	struct timespec ts;	508	struct timespec ts;
77	clock_gettime (CLOCK_MONOTONIC, &ts);	509	clock_gettime (CLOCK_MONOTONIC, &ts);
78	return ts.tv_sec + ts.tv_nsec * 1e-9;	510	return ts.tv_sec + ts.tv_nsec * 1e-9;
79	}	511	}
80	#endif	512	#endif
81		513
82	return ev_time ();	514	return ev_time ();
83	}	515	}
84		516
85	#define array_needsize(base,cur,cnt,init) \	517	#if EV_MULTIPLICITY
86	if ((cnt) > cur) \	518	ev_tstamp
87	{ \	519	ev_now (EV_P)
88	int newcnt = cur ? cur << 1 : 16; \	520	{
89	base = realloc (base, sizeof (base) (newcnt)); \	521	return ev_rt_now;
90	init (base + cur, newcnt - cur); \	522	}
91	cur = newcnt; \	523	#endif
		524
		525	void
		526	ev_sleep (ev_tstamp delay)
		527	{
		528	if (delay > 0.)
92	}	529	{
		530	#if EV_USE_NANOSLEEP
		531	struct timespec ts;
		532
		533	ts.tv_sec = (time_t)delay;
		534	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		535
		536	nanosleep (&ts, 0);
		537	#elif defined(_WIN32)
		538	Sleep ((unsigned long)(delay * 1e3));
		539	#else
		540	struct timeval tv;
		541
		542	tv.tv_sec = (time_t)delay;
		543	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		544
		545	select (0, 0, 0, 0, &tv);
		546	#endif
		547	}
		548	}
93		549
94	/*****************************************************************************/	550	/*****************************************************************************/
95		551
		552	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /
		553
		554	int inline_size
		555	array_nextsize (int elem, int cur, int cnt)
		556	{
		557	int ncur = cur + 1;
		558
		559	do
		560	ncur <<= 1;
		561	while (cnt > ncur);
		562
		563	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		564	if (elem * ncur > MALLOC_ROUND - sizeof (void ) 4)
		565	{
		566	ncur *= elem;
		567	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void ) 4) & ~(MALLOC_ROUND - 1);
		568	ncur = ncur - sizeof (void ) 4;
		569	ncur /= elem;
		570	}
		571
		572	return ncur;
		573	}
		574
		575	static noinline void *
		576	array_realloc (int elem, void base, int cur, int cnt)
		577	{
		578	cur = array_nextsize (elem, cur, cnt);
		579	return ev_realloc (base, elem * *cur);
		580	}
		581
		582	#define array_needsize(type,base,cur,cnt,init) \
		583	if (expect_false ((cnt) > (cur))) \
		584	{ \
		585	int ocur_ = (cur); \
		586	(base) = (type *)array_realloc \
		587	(sizeof (type), (base), &(cur), (cnt)); \
		588	init ((base) + (ocur_), (cur) - ocur_); \
		589	}
		590
		591	#if 0
		592	#define array_slim(type,stem) \
		593	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		594	{ \
		595	stem ## max = array_roundsize (stem ## cnt >> 1); \
		596	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
		597	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		598	}
		599	#endif
		600
		601	#define array_free(stem, idx) \
		602	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		603
		604	/*****************************************************************************/
		605
		606	void noinline
		607	ev_feed_event (EV_P_ void *w, int revents)
		608	{
		609	W w_ = (W)w;
		610	int pri = ABSPRI (w_);
		611
		612	if (expect_false (w_->pending))
		613	pendings [pri][w_->pending - 1].events \|= revents;
		614	else
		615	{
		616	w_->pending = ++pendingcnt [pri];
		617	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		618	pendings [pri][w_->pending - 1].w = w_;
		619	pendings [pri][w_->pending - 1].events = revents;
		620	}
		621	}
		622
		623	void inline_speed
		624	queue_events (EV_P_ W *events, int eventcnt, int type)
		625	{
		626	int i;
		627
		628	for (i = 0; i < eventcnt; ++i)
		629	ev_feed_event (EV_A_ events [i], type);
		630	}
		631
		632	/*****************************************************************************/
		633
		634	void inline_size
		635	anfds_init (ANFD *base, int count)
		636	{
		637	while (count--)
		638	{
		639	base->head = 0;
		640	base->events = EV_NONE;
		641	base->reify = 0;
		642
		643	++base;
		644	}
		645	}
		646
		647	void inline_speed
		648	fd_event (EV_P_ int fd, int revents)
		649	{
		650	ANFD *anfd = anfds + fd;
		651	ev_io *w;
		652
		653	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
		654	{
		655	int ev = w->events & revents;
		656
		657	if (ev)
		658	ev_feed_event (EV_A_ (W)w, ev);
		659	}
		660	}
		661
		662	void
		663	ev_feed_fd_event (EV_P_ int fd, int revents)
		664	{
		665	if (fd >= 0 && fd < anfdmax)
		666	fd_event (EV_A_ fd, revents);
		667	}
		668
		669	void inline_size
		670	fd_reify (EV_P)
		671	{
		672	int i;
		673
		674	for (i = 0; i < fdchangecnt; ++i)
		675	{
		676	int fd = fdchanges [i];
		677	ANFD *anfd = anfds + fd;
		678	ev_io *w;
		679
		680	unsigned char events = 0;
		681
		682	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
		683	events \|= (unsigned char)w->events;
		684
		685	#if EV_SELECT_IS_WINSOCKET
		686	if (events)
		687	{
		688	unsigned long argp;
		689	#ifdef EV_FD_TO_WIN32_HANDLE
		690	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		691	#else
		692	anfd->handle = _get_osfhandle (fd);
		693	#endif
		694	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		695	}
		696	#endif
		697
		698	{
		699	unsigned char o_events = anfd->events;
		700	unsigned char o_reify = anfd->reify;
		701
		702	anfd->reify = 0;
		703	anfd->events = events;
		704
		705	if (o_events != events \|\| o_reify & EV_IOFDSET)
		706	backend_modify (EV_A_ fd, o_events, events);
		707	}
		708	}
		709
		710	fdchangecnt = 0;
		711	}
		712
		713	void inline_size
		714	fd_change (EV_P_ int fd, int flags)
		715	{
		716	unsigned char reify = anfds [fd].reify;
		717	anfds [fd].reify \|= flags;
		718
		719	if (expect_true (!reify))
		720	{
		721	++fdchangecnt;
		722	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		723	fdchanges [fdchangecnt - 1] = fd;
		724	}
		725	}
		726
		727	void inline_speed
		728	fd_kill (EV_P_ int fd)
		729	{
		730	ev_io *w;
		731
		732	while ((w = (ev_io *)anfds [fd].head))
		733	{
		734	ev_io_stop (EV_A_ w);
		735	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		736	}
		737	}
		738
		739	int inline_size
		740	fd_valid (int fd)
		741	{
		742	#ifdef _WIN32
		743	return _get_osfhandle (fd) != -1;
		744	#else
		745	return fcntl (fd, F_GETFD) != -1;
		746	#endif
		747	}
		748
		749	/* called on EBADF to verify fds */
		750	static void noinline
		751	fd_ebadf (EV_P)
		752	{
		753	int fd;
		754
		755	for (fd = 0; fd < anfdmax; ++fd)
		756	if (anfds [fd].events)
		757	if (!fd_valid (fd) == -1 && errno == EBADF)
		758	fd_kill (EV_A_ fd);
		759	}
		760
		761	/* called on ENOMEM in select/poll to kill some fds and retry */
		762	static void noinline
		763	fd_enomem (EV_P)
		764	{
		765	int fd;
		766
		767	for (fd = anfdmax; fd--; )
		768	if (anfds [fd].events)
		769	{
		770	fd_kill (EV_A_ fd);
		771	return;
		772	}
		773	}
		774
		775	/* usually called after fork if backend needs to re-arm all fds from scratch */
		776	static void noinline
		777	fd_rearm_all (EV_P)
		778	{
		779	int fd;
		780
		781	for (fd = 0; fd < anfdmax; ++fd)
		782	if (anfds [fd].events)
		783	{
		784	anfds [fd].events = 0;
		785	fd_change (EV_A_ fd, EV_IOFDSET \| 1);
		786	}
		787	}
		788
		789	/*****************************************************************************/
		790
		791	/*
		792	* the heap functions want a real array index. array index 0 uis guaranteed to not
		793	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		794	* the branching factor of the d-tree.
		795	*/
		796
		797	/*
		798	* at the moment we allow libev the luxury of two heaps,
		799	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		800	* which is more cache-efficient.
		801	* the difference is about 5% with 50000+ watchers.
		802	*/
		803	#if EV_USE_4HEAP
		804
		805	#define DHEAP 4
		806	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		807
		808	/* towards the root */
		809	void inline_speed
		810	upheap (ANHE *heap, int k)
		811	{
		812	ANHE he = heap [k];
		813
		814	for (;;)
		815	{
		816	int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
		817
		818	if (p == k \|\| ANHE_at (heap [p]) <= ANHE_at (he))
		819	break;
		820
		821	heap [k] = heap [p];
		822	ev_active (ANHE_w (heap [k])) = k;
		823	k = p;
		824	}
		825
		826	ev_active (ANHE_w (he)) = k;
		827	heap [k] = he;
		828	}
		829
		830	/* away from the root */
		831	void inline_speed
		832	downheap (ANHE *heap, int N, int k)
		833	{
		834	ANHE he = heap [k];
		835	ANHE *E = heap + N + HEAP0;
		836
		837	for (;;)
		838	{
		839	ev_tstamp minat;
		840	ANHE *minpos;
		841	ANHE pos = heap + DHEAP (k - HEAP0) + HEAP0;
		842
		843	// find minimum child
		844	if (expect_true (pos + DHEAP - 1 < E))
		845	{
		846	/* fast path / (minpos = pos + 0), (minat = ANHE_at (minpos));
		847	if (ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		848	if (ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		849	if (ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		850	}
		851	else if (pos < E)
		852	{
		853	/* slow path / (minpos = pos + 0), (minat = ANHE_at (minpos));
		854	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		855	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		856	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		857	}
		858	else
		859	break;
		860
		861	if (ANHE_at (he) <= minat)
		862	break;
		863
		864	ev_active (ANHE_w (*minpos)) = k;
		865	heap [k] = *minpos;
		866
		867	k = minpos - heap;
		868	}
		869
		870	ev_active (ANHE_w (he)) = k;
		871	heap [k] = he;
		872	}
		873
		874	#else // 4HEAP
		875
		876	#define HEAP0 1
		877
		878	/* towards the root */
		879	void inline_speed
		880	upheap (ANHE *heap, int k)
		881	{
		882	ANHE he = heap [k];
		883
		884	for (;;)
		885	{
		886	int p = k >> 1;
		887
		888	/* maybe we could use a dummy element at heap [0]? */
		889	if (!p \|\| ANHE_at (heap [p]) <= ANHE_at (he))
		890	break;
		891
		892	heap [k] = heap [p];
		893	ev_active (ANHE_w (heap [k])) = k;
		894	k = p;
		895	}
		896
		897	heap [k] = he;
		898	ev_active (ANHE_w (heap [k])) = k;
		899	}
		900
		901	/* away from the root */
		902	void inline_speed
		903	downheap (ANHE *heap, int N, int k)
		904	{
		905	ANHE he = heap [k];
		906
		907	for (;;)
		908	{
		909	int c = k << 1;
		910
		911	if (c > N)
		912	break;
		913
		914	c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		915	? 1 : 0;
		916
		917	if (ANHE_at (he) <= ANHE_at (heap [c]))
		918	break;
		919
		920	heap [k] = heap [c];
		921	ev_active (ANHE_w (heap [k])) = k;
		922
		923	k = c;
		924	}
		925
		926	heap [k] = he;
		927	ev_active (ANHE_w (he)) = k;
		928	}
		929	#endif
		930
		931	void inline_size
		932	adjustheap (ANHE *heap, int N, int k)
		933	{
		934	upheap (heap, k);
		935	downheap (heap, N, k);
		936	}
		937
		938	/*****************************************************************************/
		939
96	typedef struct	940	typedef struct
97	{	941	{
98	struct ev_io *head;	942	WL head;
99	unsigned char wev, rev; /* want, received event set */	943	EV_ATOMIC_T gotsig;
100	} ANFD;
101
102	static ANFD *anfds;
103	static int anfdmax;
104
105	static int *fdchanges;
106	static int fdchangemax, fdchangecnt;
107
108	static void
109	anfds_init (ANFD *base, int count)
110	{
111	while (count--)
112	{
113	base->head = 0;
114	base->wev = base->rev = EV_NONE;
115	++base;
116	}
117	}
118
119	typedef struct
120	{
121	W w;
122	int events;
123	} ANPENDING;
124
125	static ANPENDING *pendings;
126	static int pendingmax, pendingcnt;
127
128	static void
129	event (W w, int events)
130	{
131	if (w->active)
132	{
133	w->pending = ++pendingcnt;
134	array_needsize (pendings, pendingmax, pendingcnt, );
135	pendings [pendingcnt - 1].w = w;
136	pendings [pendingcnt - 1].events = events;
137	}
138	}
139
140	static void
141	fd_event (int fd, int events)
142	{
143	ANFD *anfd = anfds + fd;
144	struct ev_io *w;
145
146	for (w = anfd->head; w; w = w->next)
147	{
148	int ev = w->events & events;
149
150	if (ev)
151	event ((W)w, ev);
152	}
153	}
154
155	static void
156	queue_events (W *events, int eventcnt, int type)
157	{
158	int i;
159
160	for (i = 0; i < eventcnt; ++i)
161	event (events [i], type);
162	}
163
164	/*****************************************************************************/
165
166	static struct ev_timer **timers;
167	static int timermax, timercnt;
168
169	static struct ev_periodic **periodics;
170	static int periodicmax, periodiccnt;
171
172	static void
173	upheap (WT *timers, int k)
174	{
175	WT w = timers [k];
176
177	while (k && timers [k >> 1]->at > w->at)
178	{
179	timers [k] = timers [k >> 1];
180	timers [k]->active = k + 1;
181	k >>= 1;
182	}
183
184	timers [k] = w;
185	timers [k]->active = k + 1;
186
187	}
188
189	static void
190	downheap (WT *timers, int N, int k)
191	{
192	WT w = timers [k];
193
194	while (k < (N >> 1))
195	{
196	int j = k << 1;
197
198	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
199	++j;
200
201	if (w->at <= timers [j]->at)
202	break;
203
204	timers [k] = timers [j];
205	timers [k]->active = k + 1;
206	k = j;
207	}
208
209	timers [k] = w;
210	timers [k]->active = k + 1;
211	}
212
213	/*****************************************************************************/
214
215	typedef struct
216	{
217	struct ev_signal *head;
218	sig_atomic_t gotsig;
219	} ANSIG;	944	} ANSIG;
220		945
221	static ANSIG *signals;	946	static ANSIG *signals;
222	static int signalmax;	947	static int signalmax;
223		948
224	static int sigpipe [2];	949	static EV_ATOMIC_T gotsig;
225	static sig_atomic_t gotsig;
226	static struct ev_io sigev;
227		950
228	static void	951	void inline_size
229	signals_init (ANSIG *base, int count)	952	signals_init (ANSIG *base, int count)
230	{	953	{
231	while (count--)	954	while (count--)
232	{	955	{
233	base->head = 0;	956	base->head = 0;
234	base->gotsig = 0;	957	base->gotsig = 0;
		958
235	++base;	959	++base;
236	}	960	}
237	}	961	}
238		962
		963	/*****************************************************************************/
		964
		965	void inline_speed
		966	fd_intern (int fd)
		967	{
		968	#ifdef _WIN32
		969	int arg = 1;
		970	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		971	#else
		972	fcntl (fd, F_SETFD, FD_CLOEXEC);
		973	fcntl (fd, F_SETFL, O_NONBLOCK);
		974	#endif
		975	}
		976
		977	static void noinline
		978	evpipe_init (EV_P)
		979	{
		980	if (!ev_is_active (&pipeev))
		981	{
		982	#if EV_USE_EVENTFD
		983	if ((evfd = eventfd (0, 0)) >= 0)
		984	{
		985	evpipe [0] = -1;
		986	fd_intern (evfd);
		987	ev_io_set (&pipeev, evfd, EV_READ);
		988	}
		989	else
		990	#endif
		991	{
		992	while (pipe (evpipe))
		993	syserr ("(libev) error creating signal/async pipe");
		994
		995	fd_intern (evpipe [0]);
		996	fd_intern (evpipe [1]);
		997	ev_io_set (&pipeev, evpipe [0], EV_READ);
		998	}
		999
		1000	ev_io_start (EV_A_ &pipeev);
		1001	ev_unref (EV_A); /* watcher should not keep loop alive */
		1002	}
		1003	}
		1004
		1005	void inline_size
		1006	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1007	{
		1008	if (!*flag)
		1009	{
		1010	int old_errno = errno; /* save errno because write might clobber it */
		1011
		1012	*flag = 1;
		1013
		1014	#if EV_USE_EVENTFD
		1015	if (evfd >= 0)
		1016	{
		1017	uint64_t counter = 1;
		1018	write (evfd, &counter, sizeof (uint64_t));
		1019	}
		1020	else
		1021	#endif
		1022	write (evpipe [1], &old_errno, 1);
		1023
		1024	errno = old_errno;
		1025	}
		1026	}
		1027
239	static void	1028	static void
		1029	pipecb (EV_P_ ev_io *iow, int revents)
		1030	{
		1031	#if EV_USE_EVENTFD
		1032	if (evfd >= 0)
		1033	{
		1034	uint64_t counter;
		1035	read (evfd, &counter, sizeof (uint64_t));
		1036	}
		1037	else
		1038	#endif
		1039	{
		1040	char dummy;
		1041	read (evpipe [0], &dummy, 1);
		1042	}
		1043
		1044	if (gotsig && ev_is_default_loop (EV_A))
		1045	{
		1046	int signum;
		1047	gotsig = 0;
		1048
		1049	for (signum = signalmax; signum--; )
		1050	if (signals [signum].gotsig)
		1051	ev_feed_signal_event (EV_A_ signum + 1);
		1052	}
		1053
		1054	#if EV_ASYNC_ENABLE
		1055	if (gotasync)
		1056	{
		1057	int i;
		1058	gotasync = 0;
		1059
		1060	for (i = asynccnt; i--; )
		1061	if (asyncs [i]->sent)
		1062	{
		1063	asyncs [i]->sent = 0;
		1064	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1065	}
		1066	}
		1067	#endif
		1068	}
		1069
		1070	/*****************************************************************************/
		1071
		1072	static void
240	sighandler (int signum)	1073	ev_sighandler (int signum)
241	{	1074	{
		1075	#if EV_MULTIPLICITY
		1076	struct ev_loop *loop = &default_loop_struct;
		1077	#endif
		1078
		1079	#if _WIN32
		1080	signal (signum, ev_sighandler);
		1081	#endif
		1082
242	signals [signum - 1].gotsig = 1;	1083	signals [signum - 1].gotsig = 1;
		1084	evpipe_write (EV_A_ &gotsig);
		1085	}
243		1086
244	if (!gotsig)	1087	void noinline
		1088	ev_feed_signal_event (EV_P_ int signum)
		1089	{
		1090	WL w;
		1091
		1092	#if EV_MULTIPLICITY
		1093	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1094	#endif
		1095
		1096	--signum;
		1097
		1098	if (signum < 0 \|\| signum >= signalmax)
		1099	return;
		1100
		1101	signals [signum].gotsig = 0;
		1102
		1103	for (w = signals [signum].head; w; w = w->next)
		1104	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1105	}
		1106
		1107	/*****************************************************************************/
		1108
		1109	static WL childs [EV_PID_HASHSIZE];
		1110
		1111	#ifndef _WIN32
		1112
		1113	static ev_signal childev;
		1114
		1115	#ifndef WIFCONTINUED
		1116	# define WIFCONTINUED(status) 0
		1117	#endif
		1118
		1119	void inline_speed
		1120	child_reap (EV_P_ int chain, int pid, int status)
		1121	{
		1122	ev_child *w;
		1123	int traced = WIFSTOPPED (status) \|\| WIFCONTINUED (status);
		1124
		1125	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)
		1126	{
		1127	if ((w->pid == pid \|\| !w->pid)
		1128	&& (!traced \|\| (w->flags & 1)))
		1129	{
		1130	ev_set_priority (w, EV_MAXPRI); /* need to do it now, this must be the same prio as the signal watcher itself */
		1131	w->rpid = pid;
		1132	w->rstatus = status;
		1133	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1134	}
		1135	}
		1136	}
		1137
		1138	#ifndef WCONTINUED
		1139	# define WCONTINUED 0
		1140	#endif
		1141
		1142	static void
		1143	childcb (EV_P_ ev_signal *sw, int revents)
		1144	{
		1145	int pid, status;
		1146
		1147	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
		1148	if (0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		1149	if (!WCONTINUED
		1150	\|\| errno != EINVAL
		1151	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))
		1152	return;
		1153
		1154	/* make sure we are called again until all children have been reaped */
		1155	/* we need to do it this way so that the callback gets called before we continue */
		1156	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		1157
		1158	child_reap (EV_A_ pid, pid, status);
		1159	if (EV_PID_HASHSIZE > 1)
		1160	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		1161	}
		1162
		1163	#endif
		1164
		1165	/*****************************************************************************/
		1166
		1167	#if EV_USE_PORT
		1168	# include "ev_port.c"
		1169	#endif
		1170	#if EV_USE_KQUEUE
		1171	# include "ev_kqueue.c"
		1172	#endif
		1173	#if EV_USE_EPOLL
		1174	# include "ev_epoll.c"
		1175	#endif
		1176	#if EV_USE_POLL
		1177	# include "ev_poll.c"
		1178	#endif
		1179	#if EV_USE_SELECT
		1180	# include "ev_select.c"
		1181	#endif
		1182
		1183	int
		1184	ev_version_major (void)
		1185	{
		1186	return EV_VERSION_MAJOR;
		1187	}
		1188
		1189	int
		1190	ev_version_minor (void)
		1191	{
		1192	return EV_VERSION_MINOR;
		1193	}
		1194
		1195	/* return true if we are running with elevated privileges and should ignore env variables */
		1196	int inline_size
		1197	enable_secure (void)
		1198	{
		1199	#ifdef _WIN32
		1200	return 0;
		1201	#else
		1202	return getuid () != geteuid ()
		1203	\|\| getgid () != getegid ();
		1204	#endif
		1205	}
		1206
		1207	unsigned int
		1208	ev_supported_backends (void)
		1209	{
		1210	unsigned int flags = 0;
		1211
		1212	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
		1213	if (EV_USE_KQUEUE) flags \|= EVBACKEND_KQUEUE;
		1214	if (EV_USE_EPOLL ) flags \|= EVBACKEND_EPOLL;
		1215	if (EV_USE_POLL ) flags \|= EVBACKEND_POLL;
		1216	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
		1217
		1218	return flags;
		1219	}
		1220
		1221	unsigned int
		1222	ev_recommended_backends (void)
		1223	{
		1224	unsigned int flags = ev_supported_backends ();
		1225
		1226	#ifndef __NetBSD__
		1227	/* kqueue is borked on everything but netbsd apparently */
		1228	/* it usually doesn't work correctly on anything but sockets and pipes */
		1229	flags &= ~EVBACKEND_KQUEUE;
		1230	#endif
		1231	#ifdef __APPLE__
		1232	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1233	flags &= ~EVBACKEND_POLL;
		1234	#endif
		1235
		1236	return flags;
		1237	}
		1238
		1239	unsigned int
		1240	ev_embeddable_backends (void)
		1241	{
		1242	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
		1243
		1244	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1245	/* please fix it and tell me how to detect the fix */
		1246	flags &= ~EVBACKEND_EPOLL;
		1247
		1248	return flags;
		1249	}
		1250
		1251	unsigned int
		1252	ev_backend (EV_P)
		1253	{
		1254	return backend;
		1255	}
		1256
		1257	unsigned int
		1258	ev_loop_count (EV_P)
		1259	{
		1260	return loop_count;
		1261	}
		1262
		1263	void
		1264	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1265	{
		1266	io_blocktime = interval;
		1267	}
		1268
		1269	void
		1270	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1271	{
		1272	timeout_blocktime = interval;
		1273	}
		1274
		1275	static void noinline
		1276	loop_init (EV_P_ unsigned int flags)
		1277	{
		1278	if (!backend)
		1279	{
		1280	#if EV_USE_MONOTONIC
245	{	1281	{
		1282	struct timespec ts;
		1283	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		1284	have_monotonic = 1;
		1285	}
		1286	#endif
		1287
		1288	ev_rt_now = ev_time ();
		1289	mn_now = get_clock ();
		1290	now_floor = mn_now;
		1291	rtmn_diff = ev_rt_now - mn_now;
		1292
		1293	io_blocktime = 0.;
		1294	timeout_blocktime = 0.;
		1295	backend = 0;
		1296	backend_fd = -1;
		1297	gotasync = 0;
		1298	#if EV_USE_INOTIFY
		1299	fs_fd = -2;
		1300	#endif
		1301
		1302	/* pid check not overridable via env */
		1303	#ifndef _WIN32
		1304	if (flags & EVFLAG_FORKCHECK)
		1305	curpid = getpid ();
		1306	#endif
		1307
		1308	if (!(flags & EVFLAG_NOENV)
		1309	&& !enable_secure ()
		1310	&& getenv ("LIBEV_FLAGS"))
		1311	flags = atoi (getenv ("LIBEV_FLAGS"));
		1312
		1313	if (!(flags & 0x0000ffffU))
		1314	flags \|= ev_recommended_backends ();
		1315
		1316	#if EV_USE_PORT
		1317	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		1318	#endif
		1319	#if EV_USE_KQUEUE
		1320	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		1321	#endif
		1322	#if EV_USE_EPOLL
		1323	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		1324	#endif
		1325	#if EV_USE_POLL
		1326	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		1327	#endif
		1328	#if EV_USE_SELECT
		1329	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		1330	#endif
		1331
		1332	ev_init (&pipeev, pipecb);
		1333	ev_set_priority (&pipeev, EV_MAXPRI);
		1334	}
		1335	}
		1336
		1337	static void noinline
		1338	loop_destroy (EV_P)
		1339	{
		1340	int i;
		1341
		1342	if (ev_is_active (&pipeev))
		1343	{
		1344	ev_ref (EV_A); /* signal watcher */
		1345	ev_io_stop (EV_A_ &pipeev);
		1346
		1347	#if EV_USE_EVENTFD
		1348	if (evfd >= 0)
		1349	close (evfd);
		1350	#endif
		1351
		1352	if (evpipe [0] >= 0)
		1353	{
		1354	close (evpipe [0]);
		1355	close (evpipe [1]);
		1356	}
		1357	}
		1358
		1359	#if EV_USE_INOTIFY
		1360	if (fs_fd >= 0)
		1361	close (fs_fd);
		1362	#endif
		1363
		1364	if (backend_fd >= 0)
		1365	close (backend_fd);
		1366
		1367	#if EV_USE_PORT
		1368	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1369	#endif
		1370	#if EV_USE_KQUEUE
		1371	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1372	#endif
		1373	#if EV_USE_EPOLL
		1374	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1375	#endif
		1376	#if EV_USE_POLL
		1377	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1378	#endif
		1379	#if EV_USE_SELECT
		1380	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1381	#endif
		1382
		1383	for (i = NUMPRI; i--; )
		1384	{
		1385	array_free (pending, [i]);
		1386	#if EV_IDLE_ENABLE
		1387	array_free (idle, [i]);
		1388	#endif
		1389	}
		1390
		1391	ev_free (anfds); anfdmax = 0;
		1392
		1393	/* have to use the microsoft-never-gets-it-right macro */
		1394	array_free (fdchange, EMPTY);
		1395	array_free (timer, EMPTY);
		1396	#if EV_PERIODIC_ENABLE
		1397	array_free (periodic, EMPTY);
		1398	#endif
		1399	#if EV_FORK_ENABLE
		1400	array_free (fork, EMPTY);
		1401	#endif
		1402	array_free (prepare, EMPTY);
		1403	array_free (check, EMPTY);
		1404	#if EV_ASYNC_ENABLE
		1405	array_free (async, EMPTY);
		1406	#endif
		1407
		1408	backend = 0;
		1409	}
		1410
		1411	#if EV_USE_INOTIFY
		1412	void inline_size infy_fork (EV_P);
		1413	#endif
		1414
		1415	void inline_size
		1416	loop_fork (EV_P)
		1417	{
		1418	#if EV_USE_PORT
		1419	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1420	#endif
		1421	#if EV_USE_KQUEUE
		1422	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1423	#endif
		1424	#if EV_USE_EPOLL
		1425	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1426	#endif
		1427	#if EV_USE_INOTIFY
		1428	infy_fork (EV_A);
		1429	#endif
		1430
		1431	if (ev_is_active (&pipeev))
		1432	{
		1433	/* this "locks" the handlers against writing to the pipe */
		1434	/* while we modify the fd vars */
246	gotsig = 1;	1435	gotsig = 1;
247	write (sigpipe [1], &gotsig, 1);	1436	#if EV_ASYNC_ENABLE
		1437	gotasync = 1;
		1438	#endif
		1439
		1440	ev_ref (EV_A);
		1441	ev_io_stop (EV_A_ &pipeev);
		1442
		1443	#if EV_USE_EVENTFD
		1444	if (evfd >= 0)
		1445	close (evfd);
		1446	#endif
		1447
		1448	if (evpipe [0] >= 0)
		1449	{
		1450	close (evpipe [0]);
		1451	close (evpipe [1]);
		1452	}
		1453
		1454	evpipe_init (EV_A);
		1455	/* now iterate over everything, in case we missed something */
		1456	pipecb (EV_A_ &pipeev, EV_READ);
		1457	}
		1458
		1459	postfork = 0;
		1460	}
		1461
		1462	#if EV_MULTIPLICITY
		1463	struct ev_loop *
		1464	ev_loop_new (unsigned int flags)
		1465	{
		1466	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		1467
		1468	memset (loop, 0, sizeof (struct ev_loop));
		1469
		1470	loop_init (EV_A_ flags);
		1471
		1472	if (ev_backend (EV_A))
		1473	return loop;
		1474
		1475	return 0;
		1476	}
		1477
		1478	void
		1479	ev_loop_destroy (EV_P)
		1480	{
		1481	loop_destroy (EV_A);
		1482	ev_free (loop);
		1483	}
		1484
		1485	void
		1486	ev_loop_fork (EV_P)
		1487	{
		1488	postfork = 1; /* must be in line with ev_default_fork */
		1489	}
		1490	#endif
		1491
		1492	#if EV_MULTIPLICITY
		1493	struct ev_loop *
		1494	ev_default_loop_init (unsigned int flags)
		1495	#else
		1496	int
		1497	ev_default_loop (unsigned int flags)
		1498	#endif
		1499	{
		1500	if (!ev_default_loop_ptr)
248	}	1501	{
249	}	1502	#if EV_MULTIPLICITY
		1503	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1504	#else
		1505	ev_default_loop_ptr = 1;
		1506	#endif
250		1507
251	static void	1508	loop_init (EV_A_ flags);
252	sigcb (struct ev_io *iow, int revents)	1509
		1510	if (ev_backend (EV_A))
		1511	{
		1512	#ifndef _WIN32
		1513	ev_signal_init (&childev, childcb, SIGCHLD);
		1514	ev_set_priority (&childev, EV_MAXPRI);
		1515	ev_signal_start (EV_A_ &childev);
		1516	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1517	#endif
		1518	}
		1519	else
		1520	ev_default_loop_ptr = 0;
		1521	}
		1522
		1523	return ev_default_loop_ptr;
		1524	}
		1525
		1526	void
		1527	ev_default_destroy (void)
253	{	1528	{
254	struct ev_signal *w;	1529	#if EV_MULTIPLICITY
		1530	struct ev_loop *loop = ev_default_loop_ptr;
		1531	#endif
		1532
		1533	#ifndef _WIN32
		1534	ev_ref (EV_A); /* child watcher */
		1535	ev_signal_stop (EV_A_ &childev);
		1536	#endif
		1537
		1538	loop_destroy (EV_A);
		1539	}
		1540
		1541	void
		1542	ev_default_fork (void)
		1543	{
		1544	#if EV_MULTIPLICITY
		1545	struct ev_loop *loop = ev_default_loop_ptr;
		1546	#endif
		1547
		1548	if (backend)
		1549	postfork = 1; /* must be in line with ev_loop_fork */
		1550	}
		1551
		1552	/*****************************************************************************/
		1553
		1554	void
		1555	ev_invoke (EV_P_ void *w, int revents)
		1556	{
		1557	EV_CB_INVOKE ((W)w, revents);
		1558	}
		1559
		1560	void inline_speed
		1561	call_pending (EV_P)
		1562	{
255	int sig;	1563	int pri;
256		1564
257	gotsig = 0;	1565	for (pri = NUMPRI; pri--; )
258	read (sigpipe [0], &revents, 1);	1566	while (pendingcnt [pri])
259
260	for (sig = signalmax; sig--; )
261	if (signals [sig].gotsig)
262	{	1567	{
263	signals [sig].gotsig = 0;	1568	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
264		1569
265	for (w = signals [sig].head; w; w = w->next)	1570	if (expect_true (p->w))
266	event ((W)w, EV_SIGNAL);	1571	{
		1572	/assert (("non-pending watcher on pending list", p->w->pending));/
		1573
		1574	p->w->pending = 0;
		1575	EV_CB_INVOKE (p->w, p->events);
		1576	}
267	}	1577	}
268	}	1578	}
269		1579
270	static void	1580	#if EV_IDLE_ENABLE
271	siginit (void)	1581	void inline_size
		1582	idle_reify (EV_P)
272	{	1583	{
273	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	1584	if (expect_false (idleall))
274	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
275
276	/* rather than sort out wether we really need nb, set it */
277	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
278	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
279
280	evio_set (&sigev, sigpipe [0], EV_READ);
281	evio_start (&sigev);
282	}
283
284	/*****************************************************************************/
285
286	static struct ev_idle **idles;
287	static int idlemax, idlecnt;
288
289	static struct ev_check **checks;
290	static int checkmax, checkcnt;
291
292	/*****************************************************************************/
293
294	#if HAVE_EPOLL
295	# include "ev_epoll.c"
296	#endif
297	#if HAVE_SELECT
298	# include "ev_select.c"
299	#endif
300
301	int ev_init (int flags)
302	{
303	#if HAVE_MONOTONIC
304	{
305	struct timespec ts;
306	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
307	have_monotonic = 1;
308	}
309	#endif
310
311	ev_now = ev_time ();
312	now = get_clock ();
313	diff = ev_now - now;
314
315	if (pipe (sigpipe))
316	return 0;
317
318	ev_method = EVMETHOD_NONE;
319	#if HAVE_EPOLL
320	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
321	#endif
322	#if HAVE_SELECT
323	if (ev_method == EVMETHOD_NONE) select_init (flags);
324	#endif
325
326	if (ev_method)
327	{
328	evw_init (&sigev, sigcb);
329	siginit ();
330	}	1585	{
		1586	int pri;
331		1587
332	return ev_method;	1588	for (pri = NUMPRI; pri--; )
333	}
334
335	/*****************************************************************************/
336
337	void ev_prefork (void)
338	{
339	/* nop */
340	}
341
342	void ev_postfork_parent (void)
343	{
344	/* nop */
345	}
346
347	void ev_postfork_child (void)
348	{
349	#if HAVE_EPOLL
350	if (ev_method == EVMETHOD_EPOLL)
351	epoll_postfork_child ();
352	#endif
353
354	evio_stop (&sigev);
355	close (sigpipe [0]);
356	close (sigpipe [1]);
357	pipe (sigpipe);
358	siginit ();
359	}
360
361	/*****************************************************************************/
362
363	static void
364	fd_reify (void)
365	{
366	int i;
367
368	for (i = 0; i < fdchangecnt; ++i)
369	{
370	int fd = fdchanges [i];
371	ANFD *anfd = anfds + fd;
372	struct ev_io *w;
373
374	int wev = 0;
375
376	for (w = anfd->head; w; w = w->next)
377	wev \|= w->events;
378
379	if (anfd->wev != wev)
380	{	1589	{
381	method_modify (fd, anfd->wev, wev);	1590	if (pendingcnt [pri])
382	anfd->wev = wev;	1591	break;
		1592
		1593	if (idlecnt [pri])
		1594	{
		1595	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1596	break;
		1597	}
383	}	1598	}
384	}	1599	}
385
386	fdchangecnt = 0;
387	}	1600	}
		1601	#endif
388		1602
389	static void	1603	void inline_size
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;
401	p->w->cb (p->w, p->events);
402	}
403	}
404
405	pendingcnt = 0;
406	}
407
408	static void
409	timers_reify ()	1604	timers_reify (EV_P)
410	{	1605	{
411	while (timercnt && timers [0]->at <= now)	1606	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
412	{	1607	{
413	struct ev_timer *w = timers [0];	1608	ev_timer w = (ev_timer )ANHE_w (timers [HEAP0]);
414		1609
415	event ((W)w, EV_TIMEOUT);	1610	/assert (("inactive timer on timer heap detected", ev_is_active (w)));/
416		1611
417	/* first reschedule or stop timer */	1612	/* first reschedule or stop timer */
418	if (w->repeat)	1613	if (w->repeat)
419	{	1614	{
420	w->at = now + w->repeat;	1615	ev_at (w) += w->repeat;
421	assert (("timer timeout in the past, negative repeat?", w->at > now));	1616	if (ev_at (w) < mn_now)
		1617	ev_at (w) = mn_now;
		1618
		1619	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1620
		1621	ANHE_at_set (timers [HEAP0]);
422	downheap ((WT *)timers, timercnt, 0);	1622	downheap (timers, timercnt, HEAP0);
423	}	1623	}
424	else	1624	else
425	evtimer_stop (w); /* nonrepeating: stop timer */	1625	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
426	}
427	}
428		1626
429	static void	1627	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1628	}
		1629	}
		1630
		1631	#if EV_PERIODIC_ENABLE
		1632	void inline_size
430	periodics_reify ()	1633	periodics_reify (EV_P)
431	{	1634	{
432	while (periodiccnt && periodics [0]->at <= ev_now)	1635	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
433	{	1636	{
434	struct ev_periodic *w = periodics [0];	1637	ev_periodic w = (ev_periodic )ANHE_w (periodics [HEAP0]);
		1638
		1639	/assert (("inactive timer on periodic heap detected", ev_is_active (w)));/
435		1640
436	/* first reschedule or stop timer */	1641	/* first reschedule or stop timer */
437	if (w->interval)	1642	if (w->reschedule_cb)
438	{	1643	{
439	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1644	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
440	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1645
		1646	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		1647
		1648	ANHE_at_set (periodics [HEAP0]);
441	downheap ((WT *)periodics, periodiccnt, 0);	1649	downheap (periodics, periodiccnt, HEAP0);
		1650	}
		1651	else if (w->interval)
		1652	{
		1653	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1654	if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
		1655
		1656	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) >= ev_rt_now));
		1657
		1658	ANHE_at_set (periodics [HEAP0]);
		1659	downheap (periodics, periodiccnt, HEAP0);
442	}	1660	}
443	else	1661	else
444	evperiodic_stop (w); /* nonrepeating: stop timer */	1662	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
445		1663
446	event ((W)w, EV_TIMEOUT);	1664	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
447	}	1665	}
448	}	1666	}
449		1667
450	static void	1668	static void noinline
451	periodics_reschedule (ev_tstamp diff)	1669	periodics_reschedule (EV_P)
452	{	1670	{
453	int i;	1671	int i;
454		1672
455	/* adjust periodics after time jump */	1673	/* adjust periodics after time jump */
		1674	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
		1675	{
		1676	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);
		1677
		1678	if (w->reschedule_cb)
		1679	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1680	else if (w->interval)
		1681	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1682
		1683	ANHE_at_set (periodics [i]);
		1684	}
		1685
		1686	/* we don't use floyds algorithm, uphead is simpler and is more cache-efficient */
		1687	/* also, this is easy and corretc for both 2-heaps and 4-heaps */
456	for (i = 0; i < periodiccnt; ++i)	1688	for (i = 0; i < periodiccnt; ++i)
457	{	1689	upheap (periodics, i + HEAP0);
458	struct ev_periodic *w = periodics [i];	1690	}
		1691	#endif
459		1692
460	if (w->interval)	1693	void inline_speed
		1694	time_update (EV_P_ ev_tstamp max_block)
		1695	{
		1696	int i;
		1697
		1698	#if EV_USE_MONOTONIC
		1699	if (expect_true (have_monotonic))
		1700	{
		1701	ev_tstamp odiff = rtmn_diff;
		1702
		1703	mn_now = get_clock ();
		1704
		1705	/* only fetch the realtime clock every 0.5MIN_TIMEJUMP seconds /
		1706	/* interpolate in the meantime */
		1707	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
461	{	1708	{
462	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1709	ev_rt_now = rtmn_diff + mn_now;
		1710	return;
		1711	}
463		1712
464	if (fabs (diff) >= 1e-4)	1713	now_floor = mn_now;
		1714	ev_rt_now = ev_time ();
		1715
		1716	/* loop a few times, before making important decisions.
		1717	* on the choice of "4": one iteration isn't enough,
		1718	* in case we get preempted during the calls to
		1719	* ev_time and get_clock. a second call is almost guaranteed
		1720	* to succeed in that case, though. and looping a few more times
		1721	* doesn't hurt either as we only do this on time-jumps or
		1722	* in the unlikely event of having been preempted here.
		1723	*/
		1724	for (i = 4; --i; )
		1725	{
		1726	rtmn_diff = ev_rt_now - mn_now;
		1727
		1728	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
		1729	return; /* all is well */
		1730
		1731	ev_rt_now = ev_time ();
		1732	mn_now = get_clock ();
		1733	now_floor = mn_now;
		1734	}
		1735
		1736	# if EV_PERIODIC_ENABLE
		1737	periodics_reschedule (EV_A);
		1738	# endif
		1739	/* no timer adjustment, as the monotonic clock doesn't jump */
		1740	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1741	}
		1742	else
		1743	#endif
		1744	{
		1745	ev_rt_now = ev_time ();
		1746
		1747	if (expect_false (mn_now > ev_rt_now \|\| ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1748	{
		1749	#if EV_PERIODIC_ENABLE
		1750	periodics_reschedule (EV_A);
		1751	#endif
		1752	/* adjust timers. this is easy, as the offset is the same for all of them */
		1753	for (i = 0; i < timercnt; ++i)
465	{	1754	{
466	evperiodic_stop (w);	1755	ANHE *he = timers + i + HEAP0;
467	evperiodic_start (w);	1756	ANHE_w (*he)->at += ev_rt_now - mn_now;
468		1757	ANHE_at_set (*he);
469	i = 0; /* restart loop, inefficient, but time jumps should be rare */
470	}	1758	}
471	}	1759	}
472	}
473	}
474		1760
475	static void	1761	mn_now = ev_rt_now;
476	time_update ()
477	{
478	int i;
479
480	ev_now = ev_time ();
481
482	if (have_monotonic)
483	{	1762	}
484	ev_tstamp odiff = diff;	1763	}
485		1764
486	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1765	void
		1766	ev_ref (EV_P)
		1767	{
		1768	++activecnt;
		1769	}
		1770
		1771	void
		1772	ev_unref (EV_P)
		1773	{
		1774	--activecnt;
		1775	}
		1776
		1777	static int loop_done;
		1778
		1779	void
		1780	ev_loop (EV_P_ int flags)
		1781	{
		1782	loop_done = EVUNLOOP_CANCEL;
		1783
		1784	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
		1785
		1786	do
		1787	{
		1788	#ifndef _WIN32
		1789	if (expect_false (curpid)) /* penalise the forking check even more */
		1790	if (expect_false (getpid () != curpid))
		1791	{
		1792	curpid = getpid ();
		1793	postfork = 1;
		1794	}
		1795	#endif
		1796
		1797	#if EV_FORK_ENABLE
		1798	/* we might have forked, so queue fork handlers */
		1799	if (expect_false (postfork))
		1800	if (forkcnt)
		1801	{
		1802	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1803	call_pending (EV_A);
		1804	}
		1805	#endif
		1806
		1807	/* queue prepare watchers (and execute them) */
		1808	if (expect_false (preparecnt))
487	{	1809	{
488	now = get_clock ();	1810	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
489	diff = ev_now - now;	1811	call_pending (EV_A);
490
491	if (fabs (odiff - diff) < MIN_TIMEJUMP)
492	return; /* all is well */
493
494	ev_now = ev_time ();
495	}	1812	}
496		1813
497	periodics_reschedule (diff - odiff);	1814	if (expect_false (!activecnt))
498	/* no timer adjustment, as the monotonic clock doesn't jump */	1815	break;
499	}
500	else
501	{
502	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
503	{
504	periodics_reschedule (ev_now - now);
505		1816
506	/* adjust timers. this is easy, as the offset is the same for all */	1817	/* we might have forked, so reify kernel state if necessary */
507	for (i = 0; i < timercnt; ++i)	1818	if (expect_false (postfork))
508	timers [i]->at += diff;	1819	loop_fork (EV_A);
509	}
510		1820
511	now = ev_now;
512	}
513	}
514
515	int ev_loop_done;
516
517	void ev_loop (int flags)
518	{
519	double block;
520	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
521
522	if (checkcnt)
523	{
524	queue_events ((W *)checks, checkcnt, EV_CHECK);
525	call_pending ();
526	}
527
528	do
529	{
530	/* update fd-related kernel structures */	1821	/* update fd-related kernel structures */
531	fd_reify ();	1822	fd_reify (EV_A);
532		1823
533	/* calculate blocking time */	1824	/* calculate blocking time */
		1825	{
		1826	ev_tstamp waittime = 0.;
		1827	ev_tstamp sleeptime = 0.;
534		1828
535	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1829	if (expect_true (!(flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt)))
536	ev_now = ev_time ();
537
538	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
539	block = 0.;
540	else
541	{	1830	{
		1831	/* update time to cancel out callback processing overhead */
		1832	time_update (EV_A_ 1e100);
		1833
542	block = MAX_BLOCKTIME;	1834	waittime = MAX_BLOCKTIME;
543		1835
544	if (timercnt)	1836	if (timercnt)
545	{	1837	{
546	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1838	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
547	if (block > to) block = to;	1839	if (waittime > to) waittime = to;
548	}	1840	}
549		1841
		1842	#if EV_PERIODIC_ENABLE
550	if (periodiccnt)	1843	if (periodiccnt)
551	{	1844	{
552	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1845	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
553	if (block > to) block = to;	1846	if (waittime > to) waittime = to;
554	}	1847	}
		1848	#endif
555		1849
556	if (block < 0.) block = 0.;	1850	if (expect_false (waittime < timeout_blocktime))
		1851	waittime = timeout_blocktime;
		1852
		1853	sleeptime = waittime - backend_fudge;
		1854
		1855	if (expect_true (sleeptime > io_blocktime))
		1856	sleeptime = io_blocktime;
		1857
		1858	if (sleeptime)
		1859	{
		1860	ev_sleep (sleeptime);
		1861	waittime -= sleeptime;
		1862	}
557	}	1863	}
558		1864
559	method_poll (block);	1865	++loop_count;
		1866	backend_poll (EV_A_ waittime);
560		1867
561	/* update ev_now, do magic */	1868	/* update ev_rt_now, do magic */
562	time_update ();	1869	time_update (EV_A_ waittime + sleeptime);
		1870	}
563		1871
564	/* queue pending timers and reschedule them */	1872	/* queue pending timers and reschedule them */
		1873	timers_reify (EV_A); /* relative timers called last */
		1874	#if EV_PERIODIC_ENABLE
565	periodics_reify (); /* absolute timers first */	1875	periodics_reify (EV_A); /* absolute timers called first */
566	timers_reify (); /* relative timers second */	1876	#endif
567		1877
		1878	#if EV_IDLE_ENABLE
568	/* queue idle watchers unless io or timers are pending */	1879	/* queue idle watchers unless other events are pending */
569	if (!pendingcnt)	1880	idle_reify (EV_A);
570	queue_events ((W *)idles, idlecnt, EV_IDLE);	1881	#endif
571		1882
572	/* queue check and possibly idle watchers */	1883	/* queue check watchers, to be executed first */
		1884	if (expect_false (checkcnt))
573	queue_events ((W *)checks, checkcnt, EV_CHECK);	1885	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
574		1886
575	call_pending ();	1887	call_pending (EV_A);
576	}	1888	}
577	while (!ev_loop_done);	1889	while (expect_true (
		1890	activecnt
		1891	&& !loop_done
		1892	&& !(flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK))
		1893	));
578		1894
579	if (ev_loop_done != 2)	1895	if (loop_done == EVUNLOOP_ONE)
		1896	loop_done = EVUNLOOP_CANCEL;
		1897	}
		1898
		1899	void
		1900	ev_unloop (EV_P_ int how)
		1901	{
580	ev_loop_done = 0;	1902	loop_done = how;
581	}	1903	}
582		1904
583	/*****************************************************************************/	1905	/*****************************************************************************/
584		1906
585	static void	1907	void inline_size
586	wlist_add (WL *head, WL elem)	1908	wlist_add (WL *head, WL elem)
587	{	1909	{
588	elem->next = *head;	1910	elem->next = *head;
589	*head = elem;	1911	*head = elem;
590	}	1912	}
591		1913
592	static void	1914	void inline_size
593	wlist_del (WL *head, WL elem)	1915	wlist_del (WL *head, WL elem)
594	{	1916	{
595	while (*head)	1917	while (*head)
596	{	1918	{
597	if (*head == elem)	1919	if (*head == elem)
602		1924
603	head = &(*head)->next;	1925	head = &(*head)->next;
604	}	1926	}
605	}	1927	}
606		1928
607	static void	1929	void inline_speed
608	ev_clear (W w)	1930	clear_pending (EV_P_ W w)
609	{	1931	{
610	if (w->pending)	1932	if (w->pending)
611	{	1933	{
612	pendings [w->pending - 1].w = 0;	1934	pendings [ABSPRI (w)][w->pending - 1].w = 0;
613	w->pending = 0;	1935	w->pending = 0;
614	}	1936	}
615	}	1937	}
616		1938
617	static void	1939	int
		1940	ev_clear_pending (EV_P_ void *w)
		1941	{
		1942	W w_ = (W)w;
		1943	int pending = w_->pending;
		1944
		1945	if (expect_true (pending))
		1946	{
		1947	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1948	w_->pending = 0;
		1949	p->w = 0;
		1950	return p->events;
		1951	}
		1952	else
		1953	return 0;
		1954	}
		1955
		1956	void inline_size
		1957	pri_adjust (EV_P_ W w)
		1958	{
		1959	int pri = w->priority;
		1960	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1961	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1962	w->priority = pri;
		1963	}
		1964
		1965	void inline_speed
618	ev_start (W w, int active)	1966	ev_start (EV_P_ W w, int active)
619	{	1967	{
		1968	pri_adjust (EV_A_ w);
620	w->active = active;	1969	w->active = active;
		1970	ev_ref (EV_A);
621	}	1971	}
622		1972
623	static void	1973	void inline_size
624	ev_stop (W w)	1974	ev_stop (EV_P_ W w)
625	{	1975	{
		1976	ev_unref (EV_A);
626	w->active = 0;	1977	w->active = 0;
627	}	1978	}
628		1979
629	/*****************************************************************************/	1980	/*****************************************************************************/
630		1981
631	void	1982	void noinline
632	evio_start (struct ev_io *w)	1983	ev_io_start (EV_P_ ev_io *w)
633	{	1984	{
		1985	int fd = w->fd;
		1986
634	if (ev_is_active (w))	1987	if (expect_false (ev_is_active (w)))
635	return;	1988	return;
636		1989
637	int fd = w->fd;	1990	assert (("ev_io_start called with negative fd", fd >= 0));
638		1991
639	ev_start ((W)w, 1);	1992	ev_start (EV_A_ (W)w, 1);
640	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1993	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
641	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1994	wlist_add (&anfds[fd].head, (WL)w);
642		1995
643	++fdchangecnt;	1996	fd_change (EV_A_ fd, w->events & EV_IOFDSET \| 1);
644	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	1997	w->events &= ~EV_IOFDSET;
645	fdchanges [fdchangecnt - 1] = fd;
646	}	1998	}
647		1999
648	void	2000	void noinline
649	evio_stop (struct ev_io *w)	2001	ev_io_stop (EV_P_ ev_io *w)
650	{	2002	{
651	ev_clear ((W)w);	2003	clear_pending (EV_A_ (W)w);
652	if (!ev_is_active (w))	2004	if (expect_false (!ev_is_active (w)))
653	return;	2005	return;
654		2006
		2007	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		2008
655	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	2009	wlist_del (&anfds[w->fd].head, (WL)w);
656	ev_stop ((W)w);	2010	ev_stop (EV_A_ (W)w);
657		2011
658	++fdchangecnt;	2012	fd_change (EV_A_ w->fd, 1);
659	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
660	fdchanges [fdchangecnt - 1] = w->fd;
661	}	2013	}
662		2014
663	void	2015	void noinline
664	evtimer_start (struct ev_timer *w)	2016	ev_timer_start (EV_P_ ev_timer *w)
665	{	2017	{
666	if (ev_is_active (w))	2018	if (expect_false (ev_is_active (w)))
667	return;	2019	return;
668		2020
669	w->at += now;	2021	ev_at (w) += mn_now;
670		2022
671	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	2023	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
672		2024
673	ev_start ((W)w, ++timercnt);	2025	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
674	array_needsize (timers, timermax, timercnt, );	2026	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
675	timers [timercnt - 1] = w;	2027	ANHE_w (timers [ev_active (w)]) = (WT)w;
676	upheap ((WT *)timers, timercnt - 1);	2028	ANHE_at_set (timers [ev_active (w)]);
677	}	2029	upheap (timers, ev_active (w));
678		2030
679	void	2031	/assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));/
		2032	}
		2033
		2034	void noinline
680	evtimer_stop (struct ev_timer *w)	2035	ev_timer_stop (EV_P_ ev_timer *w)
681	{	2036	{
682	ev_clear ((W)w);	2037	clear_pending (EV_A_ (W)w);
683	if (!ev_is_active (w))	2038	if (expect_false (!ev_is_active (w)))
684	return;	2039	return;
685		2040
686	if (w->active < timercnt--)	2041	{
		2042	int active = ev_active (w);
		2043
		2044	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
		2045
		2046	if (expect_true (active < timercnt + HEAP0 - 1))
687	{	2047	{
688	timers [w->active - 1] = timers [timercnt];	2048	timers [active] = timers [timercnt + HEAP0 - 1];
689	downheap ((WT *)timers, timercnt, w->active - 1);	2049	adjustheap (timers, timercnt, active);
690	}	2050	}
691		2051
692	w->at = w->repeat;	2052	--timercnt;
		2053	}
693		2054
		2055	ev_at (w) -= mn_now;
		2056
694	ev_stop ((W)w);	2057	ev_stop (EV_A_ (W)w);
695	}	2058	}
696		2059
697	void	2060	void noinline
698	evtimer_again (struct ev_timer *w)	2061	ev_timer_again (EV_P_ ev_timer *w)
699	{	2062	{
700	if (ev_is_active (w))	2063	if (ev_is_active (w))
701	{	2064	{
702	if (w->repeat)	2065	if (w->repeat)
703	{	2066	{
704	w->at = now + w->repeat;	2067	ev_at (w) = mn_now + w->repeat;
		2068	ANHE_at_set (timers [ev_active (w)]);
705	downheap ((WT *)timers, timercnt, w->active - 1);	2069	adjustheap (timers, timercnt, ev_active (w));
706	}	2070	}
707	else	2071	else
708	evtimer_stop (w);	2072	ev_timer_stop (EV_A_ w);
709	}	2073	}
710	else if (w->repeat)	2074	else if (w->repeat)
		2075	{
		2076	ev_at (w) = w->repeat;
711	evtimer_start (w);	2077	ev_timer_start (EV_A_ w);
		2078	}
712	}	2079	}
713		2080
714	void	2081	#if EV_PERIODIC_ENABLE
		2082	void noinline
715	evperiodic_start (struct ev_periodic *w)	2083	ev_periodic_start (EV_P_ ev_periodic *w)
716	{	2084	{
717	if (ev_is_active (w))	2085	if (expect_false (ev_is_active (w)))
718	return;	2086	return;
719		2087
720	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	2088	if (w->reschedule_cb)
721		2089	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2090	else if (w->interval)
		2091	{
		2092	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
722	/* this formula differs from the one in periodic_reify because we do not always round up */	2093	/* this formula differs from the one in periodic_reify because we do not always round up */
723	if (w->interval)
724	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	2094	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		2095	}
		2096	else
		2097	ev_at (w) = w->offset;
725		2098
726	ev_start ((W)w, ++periodiccnt);	2099	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
727	array_needsize (periodics, periodicmax, periodiccnt, );	2100	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
728	periodics [periodiccnt - 1] = w;	2101	ANHE_w (periodics [ev_active (w)]) = (WT)w;
729	upheap ((WT *)periodics, periodiccnt - 1);	2102	ANHE_at_set (periodics [ev_active (w)]);
730	}	2103	upheap (periodics, ev_active (w));
731		2104
732	void	2105	/assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));/
		2106	}
		2107
		2108	void noinline
733	evperiodic_stop (struct ev_periodic *w)	2109	ev_periodic_stop (EV_P_ ev_periodic *w)
734	{	2110	{
735	ev_clear ((W)w);	2111	clear_pending (EV_A_ (W)w);
736	if (!ev_is_active (w))	2112	if (expect_false (!ev_is_active (w)))
737	return;	2113	return;
738		2114
739	if (w->active < periodiccnt--)	2115	{
		2116	int active = ev_active (w);
		2117
		2118	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
		2119
		2120	if (expect_true (active < periodiccnt + HEAP0 - 1))
740	{	2121	{
741	periodics [w->active - 1] = periodics [periodiccnt];	2122	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
742	downheap ((WT *)periodics, periodiccnt, w->active - 1);	2123	adjustheap (periodics, periodiccnt, active);
743	}	2124	}
744		2125
		2126	--periodiccnt;
		2127	}
		2128
745	ev_stop ((W)w);	2129	ev_stop (EV_A_ (W)w);
746	}	2130	}
747		2131
748	void	2132	void noinline
		2133	ev_periodic_again (EV_P_ ev_periodic *w)
		2134	{
		2135	/* TODO: use adjustheap and recalculation */
		2136	ev_periodic_stop (EV_A_ w);
		2137	ev_periodic_start (EV_A_ w);
		2138	}
		2139	#endif
		2140
		2141	#ifndef SA_RESTART
		2142	# define SA_RESTART 0
		2143	#endif
		2144
		2145	void noinline
749	evsignal_start (struct ev_signal *w)	2146	ev_signal_start (EV_P_ ev_signal *w)
750	{	2147	{
		2148	#if EV_MULTIPLICITY
		2149	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2150	#endif
751	if (ev_is_active (w))	2151	if (expect_false (ev_is_active (w)))
752	return;	2152	return;
753		2153
754	ev_start ((W)w, 1);	2154	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		2155
		2156	evpipe_init (EV_A);
		2157
		2158	{
		2159	#ifndef _WIN32
		2160	sigset_t full, prev;
		2161	sigfillset (&full);
		2162	sigprocmask (SIG_SETMASK, &full, &prev);
		2163	#endif
		2164
755	array_needsize (signals, signalmax, w->signum, signals_init);	2165	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2166
		2167	#ifndef _WIN32
		2168	sigprocmask (SIG_SETMASK, &prev, 0);
		2169	#endif
		2170	}
		2171
		2172	ev_start (EV_A_ (W)w, 1);
756	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2173	wlist_add (&signals [w->signum - 1].head, (WL)w);
757		2174
758	if (!w->next)	2175	if (!((WL)w)->next)
759	{	2176	{
		2177	#if _WIN32
		2178	signal (w->signum, ev_sighandler);
		2179	#else
760	struct sigaction sa;	2180	struct sigaction sa;
761	sa.sa_handler = sighandler;	2181	sa.sa_handler = ev_sighandler;
762	sigfillset (&sa.sa_mask);	2182	sigfillset (&sa.sa_mask);
763	sa.sa_flags = 0;	2183	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
764	sigaction (w->signum, &sa, 0);	2184	sigaction (w->signum, &sa, 0);
		2185	#endif
765	}	2186	}
766	}	2187	}
767		2188
768	void	2189	void noinline
769	evsignal_stop (struct ev_signal *w)	2190	ev_signal_stop (EV_P_ ev_signal *w)
770	{	2191	{
771	ev_clear ((W)w);	2192	clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	2193	if (expect_false (!ev_is_active (w)))
773	return;	2194	return;
774		2195
775	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2196	wlist_del (&signals [w->signum - 1].head, (WL)w);
776	ev_stop ((W)w);	2197	ev_stop (EV_A_ (W)w);
777		2198
778	if (!signals [w->signum - 1].head)	2199	if (!signals [w->signum - 1].head)
779	signal (w->signum, SIG_DFL);	2200	signal (w->signum, SIG_DFL);
780	}	2201	}
781		2202
782	void evidle_start (struct ev_idle *w)	2203	void
		2204	ev_child_start (EV_P_ ev_child *w)
783	{	2205	{
		2206	#if EV_MULTIPLICITY
		2207	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		2208	#endif
784	if (ev_is_active (w))	2209	if (expect_false (ev_is_active (w)))
785	return;	2210	return;
786		2211
787	ev_start ((W)w, ++idlecnt);	2212	ev_start (EV_A_ (W)w, 1);
788	array_needsize (idles, idlemax, idlecnt, );	2213	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
789	idles [idlecnt - 1] = w;
790	}	2214	}
791		2215
792	void evidle_stop (struct ev_idle *w)	2216	void
		2217	ev_child_stop (EV_P_ ev_child *w)
793	{	2218	{
794	ev_clear ((W)w);	2219	clear_pending (EV_A_ (W)w);
795	if (ev_is_active (w))	2220	if (expect_false (!ev_is_active (w)))
796	return;	2221	return;
797		2222
798	idles [w->active - 1] = idles [--idlecnt];	2223	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
799	ev_stop ((W)w);	2224	ev_stop (EV_A_ (W)w);
800	}	2225	}
801		2226
802	void evcheck_start (struct ev_check *w)	2227	#if EV_STAT_ENABLE
		2228
		2229	# ifdef _WIN32
		2230	# undef lstat
		2231	# define lstat(a,b) _stati64 (a,b)
		2232	# endif
		2233
		2234	#define DEF_STAT_INTERVAL 5.0074891
		2235	#define MIN_STAT_INTERVAL 0.1074891
		2236
		2237	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2238
		2239	#if EV_USE_INOTIFY
		2240	# define EV_INOTIFY_BUFSIZE 8192
		2241
		2242	static void noinline
		2243	infy_add (EV_P_ ev_stat *w)
803	{	2244	{
804	if (ev_is_active (w))	2245	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);
		2246
		2247	if (w->wd < 0)
		2248	{
		2249	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2250
		2251	/* monitor some parent directory for speedup hints */
		2252	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2253	/* but an efficiency issue only */
		2254	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)
		2255	{
		2256	char path [4096];
		2257	strcpy (path, w->path);
		2258
		2259	do
		2260	{
		2261	int mask = IN_MASK_ADD \| IN_DELETE_SELF \| IN_MOVE_SELF
		2262	\| (errno == EACCES ? IN_ATTRIB : IN_CREATE \| IN_MOVED_TO);
		2263
		2264	char *pend = strrchr (path, '/');
		2265
		2266	if (!pend)
		2267	break; /* whoops, no '/', complain to your admin */
		2268
		2269	*pend = 0;
		2270	w->wd = inotify_add_watch (fs_fd, path, mask);
		2271	}
		2272	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
		2273	}
		2274	}
		2275	else
		2276	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2277
		2278	if (w->wd >= 0)
		2279	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2280	}
		2281
		2282	static void noinline
		2283	infy_del (EV_P_ ev_stat *w)
		2284	{
		2285	int slot;
		2286	int wd = w->wd;
		2287
		2288	if (wd < 0)
805	return;	2289	return;
806		2290
		2291	w->wd = -2;
		2292	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2293	wlist_del (&fs_hash [slot].head, (WL)w);
		2294
		2295	/* remove this watcher, if others are watching it, they will rearm */
		2296	inotify_rm_watch (fs_fd, wd);
		2297	}
		2298
		2299	static void noinline
		2300	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2301	{
		2302	if (slot < 0)
		2303	/* overflow, need to check for all hahs slots */
		2304	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2305	infy_wd (EV_A_ slot, wd, ev);
		2306	else
		2307	{
		2308	WL w_;
		2309
		2310	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2311	{
		2312	ev_stat w = (ev_stat )w_;
		2313	w_ = w_->next; /* lets us remove this watcher and all before it */
		2314
		2315	if (w->wd == wd \|\| wd == -1)
		2316	{
		2317	if (ev->mask & (IN_IGNORED \| IN_UNMOUNT \| IN_DELETE_SELF))
		2318	{
		2319	w->wd = -1;
		2320	infy_add (EV_A_ w); /* re-add, no matter what */
		2321	}
		2322
		2323	stat_timer_cb (EV_A_ &w->timer, 0);
		2324	}
		2325	}
		2326	}
		2327	}
		2328
		2329	static void
		2330	infy_cb (EV_P_ ev_io *w, int revents)
		2331	{
		2332	char buf [EV_INOTIFY_BUFSIZE];
		2333	struct inotify_event ev = (struct inotify_event )buf;
		2334	int ofs;
		2335	int len = read (fs_fd, buf, sizeof (buf));
		2336
		2337	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2338	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2339	}
		2340
		2341	void inline_size
		2342	infy_init (EV_P)
		2343	{
		2344	if (fs_fd != -2)
		2345	return;
		2346
		2347	fs_fd = inotify_init ();
		2348
		2349	if (fs_fd >= 0)
		2350	{
		2351	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2352	ev_set_priority (&fs_w, EV_MAXPRI);
		2353	ev_io_start (EV_A_ &fs_w);
		2354	}
		2355	}
		2356
		2357	void inline_size
		2358	infy_fork (EV_P)
		2359	{
		2360	int slot;
		2361
		2362	if (fs_fd < 0)
		2363	return;
		2364
		2365	close (fs_fd);
		2366	fs_fd = inotify_init ();
		2367
		2368	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2369	{
		2370	WL w_ = fs_hash [slot].head;
		2371	fs_hash [slot].head = 0;
		2372
		2373	while (w_)
		2374	{
		2375	ev_stat w = (ev_stat )w_;
		2376	w_ = w_->next; /* lets us add this watcher */
		2377
		2378	w->wd = -1;
		2379
		2380	if (fs_fd >= 0)
		2381	infy_add (EV_A_ w); /* re-add, no matter what */
		2382	else
		2383	ev_timer_start (EV_A_ &w->timer);
		2384	}
		2385
		2386	}
		2387	}
		2388
		2389	#endif
		2390
		2391	void
		2392	ev_stat_stat (EV_P_ ev_stat *w)
		2393	{
		2394	if (lstat (w->path, &w->attr) < 0)
		2395	w->attr.st_nlink = 0;
		2396	else if (!w->attr.st_nlink)
		2397	w->attr.st_nlink = 1;
		2398	}
		2399
		2400	static void noinline
		2401	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2402	{
		2403	ev_stat w = (ev_stat )(((char *)w_) - offsetof (ev_stat, timer));
		2404
		2405	/* we copy this here each the time so that */
		2406	/* prev has the old value when the callback gets invoked */
		2407	w->prev = w->attr;
		2408	ev_stat_stat (EV_A_ w);
		2409
		2410	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2411	if (
		2412	w->prev.st_dev != w->attr.st_dev
		2413	\|\| w->prev.st_ino != w->attr.st_ino
		2414	\|\| w->prev.st_mode != w->attr.st_mode
		2415	\|\| w->prev.st_nlink != w->attr.st_nlink
		2416	\|\| w->prev.st_uid != w->attr.st_uid
		2417	\|\| w->prev.st_gid != w->attr.st_gid
		2418	\|\| w->prev.st_rdev != w->attr.st_rdev
		2419	\|\| w->prev.st_size != w->attr.st_size
		2420	\|\| w->prev.st_atime != w->attr.st_atime
		2421	\|\| w->prev.st_mtime != w->attr.st_mtime
		2422	\|\| w->prev.st_ctime != w->attr.st_ctime
		2423	) {
		2424	#if EV_USE_INOTIFY
		2425	infy_del (EV_A_ w);
		2426	infy_add (EV_A_ w);
		2427	ev_stat_stat (EV_A_ w); /* avoid race... */
		2428	#endif
		2429
		2430	ev_feed_event (EV_A_ w, EV_STAT);
		2431	}
		2432	}
		2433
		2434	void
		2435	ev_stat_start (EV_P_ ev_stat *w)
		2436	{
		2437	if (expect_false (ev_is_active (w)))
		2438	return;
		2439
		2440	/* since we use memcmp, we need to clear any padding data etc. */
		2441	memset (&w->prev, 0, sizeof (ev_statdata));
		2442	memset (&w->attr, 0, sizeof (ev_statdata));
		2443
		2444	ev_stat_stat (EV_A_ w);
		2445
		2446	if (w->interval < MIN_STAT_INTERVAL)
		2447	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2448
		2449	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2450	ev_set_priority (&w->timer, ev_priority (w));
		2451
		2452	#if EV_USE_INOTIFY
		2453	infy_init (EV_A);
		2454
		2455	if (fs_fd >= 0)
		2456	infy_add (EV_A_ w);
		2457	else
		2458	#endif
		2459	ev_timer_start (EV_A_ &w->timer);
		2460
		2461	ev_start (EV_A_ (W)w, 1);
		2462	}
		2463
		2464	void
		2465	ev_stat_stop (EV_P_ ev_stat *w)
		2466	{
		2467	clear_pending (EV_A_ (W)w);
		2468	if (expect_false (!ev_is_active (w)))
		2469	return;
		2470
		2471	#if EV_USE_INOTIFY
		2472	infy_del (EV_A_ w);
		2473	#endif
		2474	ev_timer_stop (EV_A_ &w->timer);
		2475
		2476	ev_stop (EV_A_ (W)w);
		2477	}
		2478	#endif
		2479
		2480	#if EV_IDLE_ENABLE
		2481	void
		2482	ev_idle_start (EV_P_ ev_idle *w)
		2483	{
		2484	if (expect_false (ev_is_active (w)))
		2485	return;
		2486
		2487	pri_adjust (EV_A_ (W)w);
		2488
		2489	{
		2490	int active = ++idlecnt [ABSPRI (w)];
		2491
		2492	++idleall;
		2493	ev_start (EV_A_ (W)w, active);
		2494
		2495	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2496	idles [ABSPRI (w)][active - 1] = w;
		2497	}
		2498	}
		2499
		2500	void
		2501	ev_idle_stop (EV_P_ ev_idle *w)
		2502	{
		2503	clear_pending (EV_A_ (W)w);
		2504	if (expect_false (!ev_is_active (w)))
		2505	return;
		2506
		2507	{
		2508	int active = ev_active (w);
		2509
		2510	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2511	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2512
		2513	ev_stop (EV_A_ (W)w);
		2514	--idleall;
		2515	}
		2516	}
		2517	#endif
		2518
		2519	void
		2520	ev_prepare_start (EV_P_ ev_prepare *w)
		2521	{
		2522	if (expect_false (ev_is_active (w)))
		2523	return;
		2524
		2525	ev_start (EV_A_ (W)w, ++preparecnt);
		2526	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2527	prepares [preparecnt - 1] = w;
		2528	}
		2529
		2530	void
		2531	ev_prepare_stop (EV_P_ ev_prepare *w)
		2532	{
		2533	clear_pending (EV_A_ (W)w);
		2534	if (expect_false (!ev_is_active (w)))
		2535	return;
		2536
		2537	{
		2538	int active = ev_active (w);
		2539
		2540	prepares [active - 1] = prepares [--preparecnt];
		2541	ev_active (prepares [active - 1]) = active;
		2542	}
		2543
		2544	ev_stop (EV_A_ (W)w);
		2545	}
		2546
		2547	void
		2548	ev_check_start (EV_P_ ev_check *w)
		2549	{
		2550	if (expect_false (ev_is_active (w)))
		2551	return;
		2552
807	ev_start ((W)w, ++checkcnt);	2553	ev_start (EV_A_ (W)w, ++checkcnt);
808	array_needsize (checks, checkmax, checkcnt, );	2554	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
809	checks [checkcnt - 1] = w;	2555	checks [checkcnt - 1] = w;
810	}	2556	}
811		2557
		2558	void
812	void evcheck_stop (struct ev_check *w)	2559	ev_check_stop (EV_P_ ev_check *w)
813	{	2560	{
814	ev_clear ((W)w);	2561	clear_pending (EV_A_ (W)w);
815	if (ev_is_active (w))	2562	if (expect_false (!ev_is_active (w)))
816	return;	2563	return;
817		2564
		2565	{
		2566	int active = ev_active (w);
		2567
818	checks [w->active - 1] = checks [--checkcnt];	2568	checks [active - 1] = checks [--checkcnt];
		2569	ev_active (checks [active - 1]) = active;
		2570	}
		2571
819	ev_stop ((W)w);	2572	ev_stop (EV_A_ (W)w);
820	}	2573	}
		2574
		2575	#if EV_EMBED_ENABLE
		2576	void noinline
		2577	ev_embed_sweep (EV_P_ ev_embed *w)
		2578	{
		2579	ev_loop (w->other, EVLOOP_NONBLOCK);
		2580	}
		2581
		2582	static void
		2583	embed_io_cb (EV_P_ ev_io *io, int revents)
		2584	{
		2585	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
		2586
		2587	if (ev_cb (w))
		2588	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2589	else
		2590	ev_loop (w->other, EVLOOP_NONBLOCK);
		2591	}
		2592
		2593	static void
		2594	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2595	{
		2596	ev_embed w = (ev_embed )(((char *)prepare) - offsetof (ev_embed, prepare));
		2597
		2598	{
		2599	struct ev_loop *loop = w->other;
		2600
		2601	while (fdchangecnt)
		2602	{
		2603	fd_reify (EV_A);
		2604	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2605	}
		2606	}
		2607	}
		2608
		2609	#if 0
		2610	static void
		2611	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2612	{
		2613	ev_idle_stop (EV_A_ idle);
		2614	}
		2615	#endif
		2616
		2617	void
		2618	ev_embed_start (EV_P_ ev_embed *w)
		2619	{
		2620	if (expect_false (ev_is_active (w)))
		2621	return;
		2622
		2623	{
		2624	struct ev_loop *loop = w->other;
		2625	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2626	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2627	}
		2628
		2629	ev_set_priority (&w->io, ev_priority (w));
		2630	ev_io_start (EV_A_ &w->io);
		2631
		2632	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2633	ev_set_priority (&w->prepare, EV_MINPRI);
		2634	ev_prepare_start (EV_A_ &w->prepare);
		2635
		2636	/ev_idle_init (&w->idle, e,bed_idle_cb);/
		2637
		2638	ev_start (EV_A_ (W)w, 1);
		2639	}
		2640
		2641	void
		2642	ev_embed_stop (EV_P_ ev_embed *w)
		2643	{
		2644	clear_pending (EV_A_ (W)w);
		2645	if (expect_false (!ev_is_active (w)))
		2646	return;
		2647
		2648	ev_io_stop (EV_A_ &w->io);
		2649	ev_prepare_stop (EV_A_ &w->prepare);
		2650
		2651	ev_stop (EV_A_ (W)w);
		2652	}
		2653	#endif
		2654
		2655	#if EV_FORK_ENABLE
		2656	void
		2657	ev_fork_start (EV_P_ ev_fork *w)
		2658	{
		2659	if (expect_false (ev_is_active (w)))
		2660	return;
		2661
		2662	ev_start (EV_A_ (W)w, ++forkcnt);
		2663	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2664	forks [forkcnt - 1] = w;
		2665	}
		2666
		2667	void
		2668	ev_fork_stop (EV_P_ ev_fork *w)
		2669	{
		2670	clear_pending (EV_A_ (W)w);
		2671	if (expect_false (!ev_is_active (w)))
		2672	return;
		2673
		2674	{
		2675	int active = ev_active (w);
		2676
		2677	forks [active - 1] = forks [--forkcnt];
		2678	ev_active (forks [active - 1]) = active;
		2679	}
		2680
		2681	ev_stop (EV_A_ (W)w);
		2682	}
		2683	#endif
		2684
		2685	#if EV_ASYNC_ENABLE
		2686	void
		2687	ev_async_start (EV_P_ ev_async *w)
		2688	{
		2689	if (expect_false (ev_is_active (w)))
		2690	return;
		2691
		2692	evpipe_init (EV_A);
		2693
		2694	ev_start (EV_A_ (W)w, ++asynccnt);
		2695	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2696	asyncs [asynccnt - 1] = w;
		2697	}
		2698
		2699	void
		2700	ev_async_stop (EV_P_ ev_async *w)
		2701	{
		2702	clear_pending (EV_A_ (W)w);
		2703	if (expect_false (!ev_is_active (w)))
		2704	return;
		2705
		2706	{
		2707	int active = ev_active (w);
		2708
		2709	asyncs [active - 1] = asyncs [--asynccnt];
		2710	ev_active (asyncs [active - 1]) = active;
		2711	}
		2712
		2713	ev_stop (EV_A_ (W)w);
		2714	}
		2715
		2716	void
		2717	ev_async_send (EV_P_ ev_async *w)
		2718	{
		2719	w->sent = 1;
		2720	evpipe_write (EV_A_ &gotasync);
		2721	}
		2722	#endif
821		2723
822	/*****************************************************************************/	2724	/*****************************************************************************/
823		2725
824	struct ev_once	2726	struct ev_once
825	{	2727	{
826	struct ev_io io;	2728	ev_io io;
827	struct ev_timer to;	2729	ev_timer to;
828	void (cb)(int revents, void arg);	2730	void (cb)(int revents, void arg);
829	void *arg;	2731	void *arg;
830	};	2732	};
831		2733
832	static void	2734	static void
833	once_cb (struct ev_once *once, int revents)	2735	once_cb (EV_P_ struct ev_once *once, int revents)
834	{	2736	{
835	void (cb)(int revents, void arg) = once->cb;	2737	void (cb)(int revents, void arg) = once->cb;
836	void *arg = once->arg;	2738	void *arg = once->arg;
837		2739
838	evio_stop (&once->io);	2740	ev_io_stop (EV_A_ &once->io);
839	evtimer_stop (&once->to);	2741	ev_timer_stop (EV_A_ &once->to);
840	free (once);	2742	ev_free (once);
841		2743
842	cb (revents, arg);	2744	cb (revents, arg);
843	}	2745	}
844		2746
845	static void	2747	static void
846	once_cb_io (struct ev_io *w, int revents)	2748	once_cb_io (EV_P_ ev_io *w, int revents)
847	{	2749	{
848	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	2750	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
849	}	2751	}
850		2752
851	static void	2753	static void
852	once_cb_to (struct ev_timer *w, int revents)	2754	once_cb_to (EV_P_ ev_timer *w, int revents)
853	{	2755	{
854	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	2756	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
855	}	2757	}
856		2758
857	void	2759	void
858	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	2760	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
859	{	2761	{
860	struct ev_once *once = malloc (sizeof (struct ev_once));	2762	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
861		2763
862	if (!once)	2764	if (expect_false (!once))
863	cb (EV_ERROR, arg);	2765	{
864	else	2766	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		2767	return;
865	{	2768	}
		2769
866	once->cb = cb;	2770	once->cb = cb;
867	once->arg = arg;	2771	once->arg = arg;
868		2772
869	evw_init (&once->io, once_cb_io);	2773	ev_init (&once->io, once_cb_io);
870
871	if (fd >= 0)	2774	if (fd >= 0)
872	{	2775	{
873	evio_set (&once->io, fd, events);	2776	ev_io_set (&once->io, fd, events);
874	evio_start (&once->io);	2777	ev_io_start (EV_A_ &once->io);
875	}	2778	}
876		2779
877	evw_init (&once->to, once_cb_to);	2780	ev_init (&once->to, once_cb_to);
878
879	if (timeout >= 0.)	2781	if (timeout >= 0.)
880	{	2782	{
881	evtimer_set (&once->to, timeout, 0.);	2783	ev_timer_set (&once->to, timeout, 0.);
882	evtimer_start (&once->to);	2784	ev_timer_start (EV_A_ &once->to);
883	}
884	}
885	}
886
887	/*****************************************************************************/
888
889	#if 0
890
891	struct ev_io wio;
892
893	static void
894	sin_cb (struct ev_io *w, int revents)
895	{
896	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
897	}
898
899	static void
900	ocb (struct ev_timer *w, int revents)
901	{
902	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
903	evtimer_stop (w);
904	evtimer_start (w);
905	}
906
907	static void
908	scb (struct ev_signal *w, int revents)
909	{
910	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
911	evio_stop (&wio);
912	evio_start (&wio);
913	}
914
915	static void
916	gcb (struct ev_signal *w, int revents)
917	{
918	fprintf (stderr, "generic %x\n", revents);
919
920	}
921
922	int main (void)
923	{
924	ev_init (0);
925
926	evio_init (&wio, sin_cb, 0, EV_READ);
927	evio_start (&wio);
928
929	struct ev_timer t[10000];
930
931	#if 0
932	int i;
933	for (i = 0; i < 10000; ++i)
934	{	2785	}
935	struct ev_timer *w = t + i;
936	evw_init (w, ocb, i);
937	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
938	evtimer_start (w);
939	if (drand48 () < 0.5)
940	evtimer_stop (w);
941	}
942	#endif
943
944	struct ev_timer t1;
945	evtimer_init (&t1, ocb, 5, 10);
946	evtimer_start (&t1);
947
948	struct ev_signal sig;
949	evsignal_init (&sig, scb, SIGQUIT);
950	evsignal_start (&sig);
951
952	struct ev_check cw;
953	evcheck_init (&cw, gcb);
954	evcheck_start (&cw);
955
956	struct ev_idle iw;
957	evidle_init (&iw, gcb);
958	evidle_start (&iw);
959
960	ev_loop (0);
961
962	return 0;
963	}	2786	}
964		2787
		2788	#if EV_MULTIPLICITY
		2789	#include "ev_wrap.h"
965	#endif	2790	#endif
966		2791
		2792	#ifdef __cplusplus
		2793	}
		2794	#endif
967		2795
968
969

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Comparing libev/ev.c (file contents): Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC vs. Revision 1.244 by root, Tue May 20 23:49:41 2008 UTC

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Comparing libev/ev.c (file contents):
Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC vs.
Revision 1.244 by root, Tue May 20 23:49:41 2008 UTC