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Comparing libev/ev.c (file contents):
Revision 1.15 by root, Wed Oct 31 11:56:34 2007 UTC vs.
Revision 1.186 by root, Sat Dec 15 23:14:38 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	#define HAVE_EPOLL 1	121	#include <signal.h>
15		122
16	#ifndef HAVE_MONOTONIC	123	#ifdef EV_H
17	# ifdef CLOCK_MONOTONIC	124	# include EV_H
18	# define HAVE_MONOTONIC 1	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
19	# endif	138	# endif
20	#endif	139	#endif
21		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
22	#ifndef HAVE_SELECT	151	#ifndef EV_USE_SELECT
23	# 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
24	#endif	160	# endif
		161	#endif
25		162
26	#ifndef HAVE_EPOLL	163	#ifndef EV_USE_EPOLL
27	# 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
28	#endif	184	# endif
		185	#endif
29		186
30	#ifndef HAVE_REALTIME	187	#ifndef EV_INOTIFY_HASHSIZE
31	# 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
32	#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 */
33		231
34	#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) */
35	#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 */
36		235
37	#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
38		246
		247	#define expect_false(expr) expect ((expr) != 0, 0)
		248	#define expect_true(expr) expect ((expr) != 0, 1)
		249	#define inline_size static inline
		250
		251	#if EV_MINIMAL
		252	# define inline_speed static noinline
		253	#else
		254	# define inline_speed static inline
		255	#endif
		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
39	typedef struct ev_watcher *W;	263	typedef ev_watcher *W;
40	typedef struct ev_watcher_list *WL;	264	typedef ev_watcher_list *WL;
41	typedef struct ev_watcher_time *WT;	265	typedef ev_watcher_time *WT;
42		266
43	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
44	ev_tstamp ev_now;	365	ev_tstamp ev_rt_now;
45	int ev_method;	366	#define VAR(name,decl) static decl;
		367	#include "ev_vars.h"
		368	#undef VAR
46		369
47	static int have_monotonic; /* runtime */	370	static int ev_default_loop_ptr;
48		371
49	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	372	#endif
50	static void (*method_modify)(int fd, int oev, int nev);
51	static void (*method_poll)(ev_tstamp timeout);
52		373
53	/*****************************************************************************/	374	/*****************************************************************************/
54		375
55	ev_tstamp	376	ev_tstamp
56	ev_time (void)	377	ev_time (void)
57	{	378	{
58	#if HAVE_REALTIME	379	#if EV_USE_REALTIME
59	struct timespec ts;	380	struct timespec ts;
60	clock_gettime (CLOCK_REALTIME, &ts);	381	clock_gettime (CLOCK_REALTIME, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	382	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	#else	383	#else
63	struct timeval tv;	384	struct timeval tv;
64	gettimeofday (&tv, 0);	385	gettimeofday (&tv, 0);
65	return tv.tv_sec + tv.tv_usec * 1e-6;	386	return tv.tv_sec + tv.tv_usec * 1e-6;
66	#endif	387	#endif
67	}	388	}
68		389
69	static ev_tstamp	390	ev_tstamp inline_size
70	get_clock (void)	391	get_clock (void)
71	{	392	{
72	#if HAVE_MONOTONIC	393	#if EV_USE_MONOTONIC
73	if (have_monotonic)	394	if (expect_true (have_monotonic))
74	{	395	{
75	struct timespec ts;	396	struct timespec ts;
76	clock_gettime (CLOCK_MONOTONIC, &ts);	397	clock_gettime (CLOCK_MONOTONIC, &ts);
77	return ts.tv_sec + ts.tv_nsec * 1e-9;	398	return ts.tv_sec + ts.tv_nsec * 1e-9;
78	}	399	}
79	#endif	400	#endif
80		401
81	return ev_time ();	402	return ev_time ();
82	}	403	}
83		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
84	#define array_needsize(base,cur,cnt,init) \	441	#define array_needsize(type,base,cur,cnt,init) \
85	if ((cnt) > cur) \	442	if (expect_false ((cnt) > (cur))) \
86	{ \	443	{ \
87	int newcnt = cur ? cur << 1 : 16; \	444	int ocur_ = (cur); \
88	base = realloc (base, sizeof (*base) * (newcnt)); \	445	(base) = (type *)array_realloc \
89	init (base + cur, newcnt - cur); \	446	(sizeof (type), (base), &(cur), (cnt)); \
90	cur = newcnt; \	447	init ((base) + (ocur_), (cur) - ocur_); \
91	}	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;
92		462
93	/*****************************************************************************/	463	/*****************************************************************************/
94		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
95	typedef struct	704	typedef struct
96	{	705	{
97	struct ev_io *head;	706	WL head;
98	unsigned char wev, rev; /* want, received event set */
99	} ANFD;
100
101	static ANFD *anfds;
102	static int anfdmax;
103
104	static int *fdchanges;
105	static int fdchangemax, fdchangecnt;
106
107	static void
108	anfds_init (ANFD *base, int count)
109	{
110	while (count--)
111	{
112	base->head = 0;
113	base->wev = base->rev = EV_NONE;
114	++base;
115	}
116	}
117
118	typedef struct
119	{
120	W w;
121	int events;
122	} ANPENDING;
123
124	static ANPENDING *pendings;
125	static int pendingmax, pendingcnt;
126
127	static void
128	event (W w, int events)
129	{
130	w->pending = ++pendingcnt;
131	array_needsize (pendings, pendingmax, pendingcnt, );
132	pendings [pendingcnt - 1].w = w;
133	pendings [pendingcnt - 1].events = events;
134	}
135
136	static void
137	fd_event (int fd, int events)
138	{
139	ANFD *anfd = anfds + fd;
140	struct ev_io *w;
141
142	for (w = anfd->head; w; w = w->next)
143	{
144	int ev = w->events & events;
145
146	if (ev)
147	event ((W)w, ev);
148	}
149	}
150
151	static void
152	queue_events (W *events, int eventcnt, int type)
153	{
154	int i;
155
156	for (i = 0; i < eventcnt; ++i)
157	event (events [i], type);
158	}
159
160	/*****************************************************************************/
161
162	static struct ev_timer **timers;
163	static int timermax, timercnt;
164
165	static struct ev_periodic **periodics;
166	static int periodicmax, periodiccnt;
167
168	static void
169	upheap (WT *timers, int k)
170	{
171	WT w = timers [k];
172
173	while (k && timers [k >> 1]->at > w->at)
174	{
175	timers [k] = timers [k >> 1];
176	timers [k]->active = k + 1;
177	k >>= 1;
178	}
179
180	timers [k] = w;
181	timers [k]->active = k + 1;
182
183	}
184
185	static void
186	downheap (WT *timers, int N, int k)
187	{
188	WT w = timers [k];
189
190	while (k < (N >> 1))
191	{
192	int j = k << 1;
193
194	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
195	++j;
196
197	if (w->at <= timers [j]->at)
198	break;
199
200	timers [k] = timers [j];
201	timers [k]->active = k + 1;
202	k = j;
203	}
204
205	timers [k] = w;
206	timers [k]->active = k + 1;
207	}
208
209	/*****************************************************************************/
210
211	typedef struct
212	{
213	struct ev_signal *head;
214	sig_atomic_t gotsig;	707	sig_atomic_t volatile gotsig;
215	} ANSIG;	708	} ANSIG;
216		709
217	static ANSIG *signals;	710	static ANSIG *signals;
218	static int signalmax;	711	static int signalmax;
219		712
220	static int sigpipe [2];	713	static int sigpipe [2];
221	static sig_atomic_t gotsig;	714	static sig_atomic_t volatile gotsig;
222	static struct ev_io sigev;	715	static ev_io sigev;
223		716
224	static void	717	void inline_size
225	signals_init (ANSIG *base, int count)	718	signals_init (ANSIG *base, int count)
226	{	719	{
227	while (count--)	720	while (count--)
228	{	721	{
229	base->head = 0;	722	base->head = 0;
230	base->gotsig = 0;	723	base->gotsig = 0;
		724
231	++base;	725	++base;
232	}	726	}
233	}	727	}
234		728
235	static void	729	static void
236	sighandler (int signum)	730	sighandler (int signum)
237	{	731	{
		732	#if _WIN32
		733	signal (signum, sighandler);
		734	#endif
		735
238	signals [signum - 1].gotsig = 1;	736	signals [signum - 1].gotsig = 1;
239		737
240	if (!gotsig)	738	if (!gotsig)
241	{	739	{
		740	int old_errno = errno;
242	gotsig = 1;	741	gotsig = 1;
243	write (sigpipe [1], &gotsig, 1);	742	write (sigpipe [1], &signum, 1);
		743	errno = old_errno;
244	}	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);
245	}	765	}
246		766
247	static void	767	static void
248	sigcb (struct ev_io *iow, int revents)	768	sigcb (EV_P_ ev_io *iow, int revents)
249	{	769	{
250	struct ev_signal *w;
251	int sig;	770	int signum;
252		771
		772	read (sigpipe [0], &revents, 1);
253	gotsig = 0;	773	gotsig = 0;
254	read (sigpipe [0], &revents, 1);
255		774
256	for (sig = signalmax; sig--; )	775	for (signum = signalmax; signum--; )
257	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)
258	{	818	{
259	signals [sig].gotsig = 0;	819	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
260		820	w->rpid = pid;
261	for (w = signals [sig].head; w; w = w->next)	821	w->rstatus = status;
262	event ((W)w, EV_SIGNAL);	822	ev_feed_event (EV_A_ (W)w, EV_CHILD);
263	}	823	}
264	}	824	}
265		825
		826	#ifndef WCONTINUED
		827	# define WCONTINUED 0
		828	#endif
		829
266	static void	830	static void
267	siginit (void)	831	childcb (EV_P_ ev_signal *sw, int revents)
268	{	832	{
269	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	833	int pid, status;
270	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
271		834
272	/* 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) */
273	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	836	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
274	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	837	if (!WCONTINUED
		838	|| errno != EINVAL
		839	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		840	return;
275		841
276	evio_set (&sigev, sigpipe [0], EV_READ);	842	/* make sure we are called again until all childs have been reaped */
277	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 */
278	}	849	}
		850
		851	#endif
279		852
280	/*****************************************************************************/	853	/*****************************************************************************/
281		854
282	static struct ev_idle **idles;	855	#if EV_USE_PORT
283	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
284		870
285	static struct ev_check **checks;	871	int
286	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	array_free (prepare, EMPTY);
		1052	array_free (check, EMPTY);
		1053	array_free (fork, EMPTY);
		1054
		1055	backend = 0;
		1056	}
		1057
		1058	void inline_size infy_fork (EV_P);
		1059
		1060	void inline_size
		1061	loop_fork (EV_P)
		1062	{
		1063	#if EV_USE_PORT
		1064	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1065	#endif
		1066	#if EV_USE_KQUEUE
		1067	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1068	#endif
		1069	#if EV_USE_EPOLL
		1070	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1071	#endif
		1072	#if EV_USE_INOTIFY
		1073	infy_fork (EV_A);
		1074	#endif
		1075
		1076	if (ev_is_active (&sigev))
		1077	{
		1078	/* default loop */
		1079
		1080	ev_ref (EV_A);
		1081	ev_io_stop (EV_A_ &sigev);
		1082	close (sigpipe [0]);
		1083	close (sigpipe [1]);
		1084
		1085	while (pipe (sigpipe))
		1086	syserr ("(libev) error creating pipe");
		1087
		1088	siginit (EV_A);
		1089	}
		1090
		1091	postfork = 0;
		1092	}
		1093
		1094	#if EV_MULTIPLICITY
		1095	struct ev_loop *
		1096	ev_loop_new (unsigned int flags)
		1097	{
		1098	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1099
		1100	memset (loop, 0, sizeof (struct ev_loop));
		1101
		1102	loop_init (EV_A_ flags);
		1103
		1104	if (ev_backend (EV_A))
		1105	return loop;
		1106
		1107	return 0;
		1108	}
		1109
		1110	void
		1111	ev_loop_destroy (EV_P)
		1112	{
		1113	loop_destroy (EV_A);
		1114	ev_free (loop);
		1115	}
		1116
		1117	void
		1118	ev_loop_fork (EV_P)
		1119	{
		1120	postfork = 1;
		1121	}
		1122
		1123	#endif
		1124
		1125	#if EV_MULTIPLICITY
		1126	struct ev_loop *
		1127	ev_default_loop_init (unsigned int flags)
		1128	#else
		1129	int
		1130	ev_default_loop (unsigned int flags)
		1131	#endif
		1132	{
		1133	if (sigpipe [0] == sigpipe [1])
		1134	if (pipe (sigpipe))
		1135	return 0;
		1136
		1137	if (!ev_default_loop_ptr)
		1138	{
		1139	#if EV_MULTIPLICITY
		1140	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1141	#else
		1142	ev_default_loop_ptr = 1;
		1143	#endif
		1144
		1145	loop_init (EV_A_ flags);
		1146
		1147	if (ev_backend (EV_A))
		1148	{
		1149	siginit (EV_A);
		1150
		1151	#ifndef _WIN32
		1152	ev_signal_init (&childev, childcb, SIGCHLD);
		1153	ev_set_priority (&childev, EV_MAXPRI);
		1154	ev_signal_start (EV_A_ &childev);
		1155	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1156	#endif
		1157	}
		1158	else
		1159	ev_default_loop_ptr = 0;
		1160	}
		1161
		1162	return ev_default_loop_ptr;
		1163	}
		1164
		1165	void
		1166	ev_default_destroy (void)
		1167	{
		1168	#if EV_MULTIPLICITY
		1169	struct ev_loop *loop = ev_default_loop_ptr;
		1170	#endif
		1171
		1172	#ifndef _WIN32
		1173	ev_ref (EV_A); /* child watcher */
		1174	ev_signal_stop (EV_A_ &childev);
		1175	#endif
		1176
		1177	ev_ref (EV_A); /* signal watcher */
		1178	ev_io_stop (EV_A_ &sigev);
		1179
		1180	close (sigpipe [0]); sigpipe [0] = 0;
		1181	close (sigpipe [1]); sigpipe [1] = 0;
		1182
		1183	loop_destroy (EV_A);
		1184	}
		1185
		1186	void
		1187	ev_default_fork (void)
		1188	{
		1189	#if EV_MULTIPLICITY
		1190	struct ev_loop *loop = ev_default_loop_ptr;
		1191	#endif
		1192
		1193	if (backend)
		1194	postfork = 1;
		1195	}
287		1196
288	/*****************************************************************************/	1197	/*****************************************************************************/
289		1198
290	#if HAVE_EPOLL	1199	void
291	# include "ev_epoll.c"	1200	ev_invoke (EV_P_ void *w, int revents)
292	#endif
293	#if HAVE_SELECT
294	# include "ev_select.c"
295	#endif
296
297	int ev_init (int flags)
298	{	1201	{
299	#if HAVE_MONOTONIC	1202	EV_CB_INVOKE ((W)w, revents);
300	{
301	struct timespec ts;
302	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
303	have_monotonic = 1;
304	}
305	#endif
306
307	ev_now = ev_time ();
308	now = get_clock ();
309	diff = ev_now - now;
310
311	if (pipe (sigpipe))
312	return 0;
313
314	ev_method = EVMETHOD_NONE;
315	#if HAVE_EPOLL
316	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
317	#endif
318	#if HAVE_SELECT
319	if (ev_method == EVMETHOD_NONE) select_init (flags);
320	#endif
321
322	if (ev_method)
323	{
324	evw_init (&sigev, sigcb);
325	siginit ();
326	}
327
328	return ev_method;
329	}	1203	}
330		1204
331	/*****************************************************************************/	1205	void inline_speed
332		1206	call_pending (EV_P)
333	void ev_prefork (void)
334	{	1207	{
335	/* nop */
336	}
337
338	void ev_postfork_parent (void)
339	{
340	/* nop */
341	}
342
343	void ev_postfork_child (void)
344	{
345	#if HAVE_EPOLL
346	if (ev_method == EVMETHOD_EPOLL)
347	epoll_postfork_child ();
348	#endif
349
350	evio_stop (&sigev);
351	close (sigpipe [0]);
352	close (sigpipe [1]);
353	pipe (sigpipe);
354	siginit ();
355	}
356
357	/*****************************************************************************/
358
359	static void
360	fd_reify (void)
361	{
362	int i;	1208	int pri;
363		1209
364	for (i = 0; i < fdchangecnt; ++i)	1210	for (pri = NUMPRI; pri--; )
		1211	while (pendingcnt [pri])
365	{	1212	{
366	int fd = fdchanges [i];	1213	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
367	ANFD *anfd = anfds + fd;
368	struct ev_io *w;
369		1214
370	int wev = 0;	1215	if (expect_true (p->w))
371
372	for (w = anfd->head; w; w = w->next)
373	wev |= w->events;
374
375	if (anfd->wev != wev)
376	{	1216	{
377	method_modify (fd, anfd->wev, wev);	1217	/*assert (("non-pending watcher on pending list", p->w->pending));*/
378	anfd->wev = wev;
379	}
380	}
381		1218
382	fdchangecnt = 0;
383	}
384
385	static void
386	call_pending ()
387	{
388	int i;
389
390	for (i = 0; i < pendingcnt; ++i)
391	{
392	ANPENDING *p = pendings + i;
393
394	if (p->w)
395	{
396	p->w->pending = 0;	1219	p->w->pending = 0;
397	p->w->cb (p->w, p->events);	1220	EV_CB_INVOKE (p->w, p->events);
398	}	1221	}
399	}	1222	}
400
401	pendingcnt = 0;
402	}	1223	}
403		1224
404	static void	1225	void inline_size
405	timers_reify ()	1226	timers_reify (EV_P)
406	{	1227	{
407	while (timercnt && timers [0]->at <= now)	1228	while (timercnt && ((WT)timers [0])->at <= mn_now)
408	{	1229	{
409	struct ev_timer *w = timers [0];	1230	ev_timer *w = (ev_timer *)timers [0];
		1231
		1232	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
410		1233
411	/* first reschedule or stop timer */	1234	/* first reschedule or stop timer */
412	if (w->repeat)	1235	if (w->repeat)
413	{	1236	{
		1237	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1238
414	w->at = now + w->repeat;	1239	((WT)w)->at += w->repeat;
415	assert (("timer timeout in the past, negative repeat?", w->at > now));	1240	if (((WT)w)->at < mn_now)
		1241	((WT)w)->at = mn_now;
		1242
416	downheap ((WT *)timers, timercnt, 0);	1243	downheap (timers, timercnt, 0);
417	}	1244	}
418	else	1245	else
419	evtimer_stop (w); /* nonrepeating: stop timer */	1246	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
420		1247
421	event ((W)w, EV_TIMEOUT);	1248	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
422	}	1249	}
423	}	1250	}
424		1251
425	static void	1252	#if EV_PERIODIC_ENABLE
		1253	void inline_size
426	periodics_reify ()	1254	periodics_reify (EV_P)
427	{	1255	{
428	while (periodiccnt && periodics [0]->at <= ev_now)	1256	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
429	{	1257	{
430	struct ev_periodic *w = periodics [0];	1258	ev_periodic *w = (ev_periodic *)periodics [0];
		1259
		1260	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
431		1261
432	/* first reschedule or stop timer */	1262	/* first reschedule or stop timer */
433	if (w->interval)	1263	if (w->reschedule_cb)
434	{	1264	{
435	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1265	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
436	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1266	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
437	downheap ((WT *)periodics, periodiccnt, 0);	1267	downheap (periodics, periodiccnt, 0);
		1268	}
		1269	else if (w->interval)
		1270	{
		1271	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1272	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
		1273	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1274	downheap (periodics, periodiccnt, 0);
438	}	1275	}
439	else	1276	else
440	evperiodic_stop (w); /* nonrepeating: stop timer */	1277	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
441		1278
442	event ((W)w, EV_TIMEOUT);	1279	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
443	}	1280	}
444	}	1281	}
445		1282
446	static void	1283	static void noinline
447	periodics_reschedule (ev_tstamp diff)	1284	periodics_reschedule (EV_P)
448	{	1285	{
449	int i;	1286	int i;
450		1287
451	/* adjust periodics after time jump */	1288	/* adjust periodics after time jump */
452	for (i = 0; i < periodiccnt; ++i)	1289	for (i = 0; i < periodiccnt; ++i)
453	{	1290	{
454	struct ev_periodic *w = periodics [i];	1291	ev_periodic *w = (ev_periodic *)periodics [i];
455		1292
		1293	if (w->reschedule_cb)
		1294	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
456	if (w->interval)	1295	else if (w->interval)
		1296	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1297	}
		1298
		1299	/* now rebuild the heap */
		1300	for (i = periodiccnt >> 1; i--; )
		1301	downheap (periodics, periodiccnt, i);
		1302	}
		1303	#endif
		1304
		1305	#if EV_IDLE_ENABLE
		1306	void inline_size
		1307	idle_reify (EV_P)
		1308	{
		1309	if (expect_false (idleall))
		1310	{
		1311	int pri;
		1312
		1313	for (pri = NUMPRI; pri--; )
457	{	1314	{
458	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1315	if (pendingcnt [pri])
		1316	break;
459		1317
460	if (fabs (diff) >= 1e-4)	1318	if (idlecnt [pri])
461	{	1319	{
462	evperiodic_stop (w);	1320	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
463	evperiodic_start (w);	1321	break;
464
465	i = 0; /* restart loop, inefficient, but time jumps should be rare */
466	}	1322	}
467	}	1323	}
468	}	1324	}
469	}	1325	}
		1326	#endif
470		1327
471	static void	1328	void inline_speed
472	time_update ()	1329	time_update (EV_P_ ev_tstamp max_block)
473	{	1330	{
474	int i;	1331	int i;
475		1332
476	ev_now = ev_time ();	1333	#if EV_USE_MONOTONIC
477
478	if (have_monotonic)	1334	if (expect_true (have_monotonic))
479	{	1335	{
480	ev_tstamp odiff = diff;	1336	ev_tstamp odiff = rtmn_diff;
481		1337
482	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1338	mn_now = get_clock ();
		1339
		1340	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1341	/* interpolate in the meantime */
		1342	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
483	{	1343	{
484	now = get_clock ();	1344	ev_rt_now = rtmn_diff + mn_now;
		1345	return;
		1346	}
		1347
		1348	now_floor = mn_now;
		1349	ev_rt_now = ev_time ();
		1350
		1351	/* loop a few times, before making important decisions.
		1352	* on the choice of "4": one iteration isn't enough,
		1353	* in case we get preempted during the calls to
		1354	* ev_time and get_clock. a second call is almost guaranteed
		1355	* to succeed in that case, though. and looping a few more times
		1356	* doesn't hurt either as we only do this on time-jumps or
		1357	* in the unlikely event of having been preempted here.
		1358	*/
		1359	for (i = 4; --i; )
		1360	{
485	diff = ev_now - now;	1361	rtmn_diff = ev_rt_now - mn_now;
486		1362
487	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1363	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
488	return; /* all is well */	1364	return; /* all is well */
489		1365
490	ev_now = ev_time ();	1366	ev_rt_now = ev_time ();
		1367	mn_now = get_clock ();
		1368	now_floor = mn_now;
491	}	1369	}
492		1370
		1371	# if EV_PERIODIC_ENABLE
493	periodics_reschedule (diff - odiff);	1372	periodics_reschedule (EV_A);
		1373	# endif
494	/* no timer adjustment, as the monotonic clock doesn't jump */	1374	/* no timer adjustment, as the monotonic clock doesn't jump */
		1375	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
495	}	1376	}
496	else	1377	else
		1378	#endif
497	{	1379	{
498	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1380	ev_rt_now = ev_time ();
		1381
		1382	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
499	{	1383	{
		1384	#if EV_PERIODIC_ENABLE
500	periodics_reschedule (ev_now - now);	1385	periodics_reschedule (EV_A);
501		1386	#endif
502	/* adjust timers. this is easy, as the offset is the same for all */	1387	/* adjust timers. this is easy, as the offset is the same for all of them */
503	for (i = 0; i < timercnt; ++i)	1388	for (i = 0; i < timercnt; ++i)
504	timers [i]->at += diff;	1389	((WT)timers [i])->at += ev_rt_now - mn_now;
505	}	1390	}
506		1391
507	now = ev_now;	1392	mn_now = ev_rt_now;
508	}
509	}
510
511	int ev_loop_done;
512
513	void ev_loop (int flags)
514	{
515	double block;
516	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
517
518	if (checkcnt)
519	{	1393	}
520	queue_events ((W *)checks, checkcnt, EV_CHECK);	1394	}
521	call_pending ();	1395
522	}	1396	void
		1397	ev_ref (EV_P)
		1398	{
		1399	++activecnt;
		1400	}
		1401
		1402	void
		1403	ev_unref (EV_P)
		1404	{
		1405	--activecnt;
		1406	}
		1407
		1408	static int loop_done;
		1409
		1410	void
		1411	ev_loop (EV_P_ int flags)
		1412	{
		1413	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1414	? EVUNLOOP_ONE
		1415	: EVUNLOOP_CANCEL;
		1416
		1417	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
523		1418
524	do	1419	do
525	{	1420	{
		1421	#ifndef _WIN32
		1422	if (expect_false (curpid)) /* penalise the forking check even more */
		1423	if (expect_false (getpid () != curpid))
		1424	{
		1425	curpid = getpid ();
		1426	postfork = 1;
		1427	}
		1428	#endif
		1429
		1430	#if EV_FORK_ENABLE
		1431	/* we might have forked, so queue fork handlers */
		1432	if (expect_false (postfork))
		1433	if (forkcnt)
		1434	{
		1435	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1436	call_pending (EV_A);
		1437	}
		1438	#endif
		1439
		1440	/* queue prepare watchers (and execute them) */
		1441	if (expect_false (preparecnt))
		1442	{
		1443	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1444	call_pending (EV_A);
		1445	}
		1446
		1447	if (expect_false (!activecnt))
		1448	break;
		1449
		1450	/* we might have forked, so reify kernel state if necessary */
		1451	if (expect_false (postfork))
		1452	loop_fork (EV_A);
		1453
526	/* update fd-related kernel structures */	1454	/* update fd-related kernel structures */
527	fd_reify ();	1455	fd_reify (EV_A);
528		1456
529	/* calculate blocking time */	1457	/* calculate blocking time */
		1458	{
		1459	ev_tstamp block;
530		1460
531	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1461	if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))
532	ev_now = ev_time ();	1462	block = 0.; /* do not block at all */
533
534	if (flags & EVLOOP_NONBLOCK || idlecnt)
535	block = 0.;
536	else	1463	else
537	{	1464	{
		1465	/* update time to cancel out callback processing overhead */
		1466	time_update (EV_A_ 1e100);
		1467
538	block = MAX_BLOCKTIME;	1468	block = MAX_BLOCKTIME;
539		1469
540	if (timercnt)	1470	if (timercnt)
541	{	1471	{
542	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1472	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
543	if (block > to) block = to;	1473	if (block > to) block = to;
544	}	1474	}
545		1475
		1476	#if EV_PERIODIC_ENABLE
546	if (periodiccnt)	1477	if (periodiccnt)
547	{	1478	{
548	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1479	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
549	if (block > to) block = to;	1480	if (block > to) block = to;
550	}	1481	}
		1482	#endif
551		1483
552	if (block < 0.) block = 0.;	1484	if (expect_false (block < 0.)) block = 0.;
553	}	1485	}
554		1486
555	method_poll (block);	1487	++loop_count;
		1488	backend_poll (EV_A_ block);
556		1489
557	/* update ev_now, do magic */	1490	/* update ev_rt_now, do magic */
558	time_update ();	1491	time_update (EV_A_ block);
		1492	}
559		1493
560	/* queue pending timers and reschedule them */	1494	/* queue pending timers and reschedule them */
		1495	timers_reify (EV_A); /* relative timers called last */
		1496	#if EV_PERIODIC_ENABLE
561	periodics_reify (); /* absolute timers first */	1497	periodics_reify (EV_A); /* absolute timers called first */
562	timers_reify (); /* relative timers second */	1498	#endif
563		1499
		1500	#if EV_IDLE_ENABLE
564	/* queue idle watchers unless io or timers are pending */	1501	/* queue idle watchers unless other events are pending */
565	if (!pendingcnt)	1502	idle_reify (EV_A);
566	queue_events ((W *)idles, idlecnt, EV_IDLE);	1503	#endif
567		1504
568	/* queue check and possibly idle watchers */	1505	/* queue check watchers, to be executed first */
		1506	if (expect_false (checkcnt))
569	queue_events ((W *)checks, checkcnt, EV_CHECK);	1507	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
570		1508
571	call_pending ();	1509	call_pending (EV_A);
572	}
573	while (!ev_loop_done);
574		1510
575	if (ev_loop_done != 2)	1511	}
		1512	while (expect_true (activecnt && !loop_done));
		1513
		1514	if (loop_done == EVUNLOOP_ONE)
		1515	loop_done = EVUNLOOP_CANCEL;
		1516	}
		1517
		1518	void
		1519	ev_unloop (EV_P_ int how)
		1520	{
576	ev_loop_done = 0;	1521	loop_done = how;
577	}	1522	}
578		1523
579	/*****************************************************************************/	1524	/*****************************************************************************/
580		1525
581	static void	1526	void inline_size
582	wlist_add (WL *head, WL elem)	1527	wlist_add (WL *head, WL elem)
583	{	1528	{
584	elem->next = *head;	1529	elem->next = *head;
585	*head = elem;	1530	*head = elem;
586	}	1531	}
587		1532
588	static void	1533	void inline_size
589	wlist_del (WL *head, WL elem)	1534	wlist_del (WL *head, WL elem)
590	{	1535	{
591	while (*head)	1536	while (*head)
592	{	1537	{
593	if (*head == elem)	1538	if (*head == elem)
…		…
598		1543
599	head = &(*head)->next;	1544	head = &(*head)->next;
600	}	1545	}
601	}	1546	}
602		1547
603	static void	1548	void inline_speed
		1549	clear_pending (EV_P_ W w)
		1550	{
		1551	if (w->pending)
		1552	{
		1553	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1554	w->pending = 0;
		1555	}
		1556	}
		1557
		1558	int
		1559	ev_clear_pending (EV_P_ void *w)
		1560	{
		1561	W w_ = (W)w;
		1562	int pending = w_->pending;
		1563
		1564	if (expect_true (pending))
		1565	{
		1566	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1567	w_->pending = 0;
		1568	p->w = 0;
		1569	return p->events;
		1570	}
		1571	else
		1572	return 0;
		1573	}
		1574
		1575	void inline_size
		1576	pri_adjust (EV_P_ W w)
		1577	{
		1578	int pri = w->priority;
		1579	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1580	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1581	w->priority = pri;
		1582	}
		1583
		1584	void inline_speed
604	ev_start (W w, int active)	1585	ev_start (EV_P_ W w, int active)
605	{	1586	{
606	w->pending = 0;	1587	pri_adjust (EV_A_ w);
607	w->active = active;	1588	w->active = active;
		1589	ev_ref (EV_A);
608	}	1590	}
609		1591
610	static void	1592	void inline_size
611	ev_stop (W w)	1593	ev_stop (EV_P_ W w)
612	{	1594	{
613	if (w->pending)	1595	ev_unref (EV_A);
614	pendings [w->pending - 1].w = 0;
615
616	w->active = 0;	1596	w->active = 0;
617	}	1597	}
618		1598
619	/*****************************************************************************/	1599	/*****************************************************************************/
620		1600
621	void	1601	void noinline
622	evio_start (struct ev_io *w)	1602	ev_io_start (EV_P_ ev_io *w)
623	{	1603	{
624	if (ev_is_active (w))
625	return;
626
627	int fd = w->fd;	1604	int fd = w->fd;
628		1605
		1606	if (expect_false (ev_is_active (w)))
		1607	return;
		1608
		1609	assert (("ev_io_start called with negative fd", fd >= 0));
		1610
629	ev_start ((W)w, 1);	1611	ev_start (EV_A_ (W)w, 1);
630	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1612	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
631	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1613	wlist_add (&anfds[fd].head, (WL)w);
632		1614
633	++fdchangecnt;	1615	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
634	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	1616	w->events &= ~EV_IOFDSET;
635	fdchanges [fdchangecnt - 1] = fd;
636	}	1617	}
637		1618
638	void	1619	void noinline
639	evio_stop (struct ev_io *w)	1620	ev_io_stop (EV_P_ ev_io *w)
640	{	1621	{
		1622	clear_pending (EV_A_ (W)w);
641	if (!ev_is_active (w))	1623	if (expect_false (!ev_is_active (w)))
642	return;	1624	return;
643		1625
		1626	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1627
644	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1628	wlist_del (&anfds[w->fd].head, (WL)w);
645	ev_stop ((W)w);	1629	ev_stop (EV_A_ (W)w);
646		1630
647	++fdchangecnt;	1631	fd_change (EV_A_ w->fd, 1);
648	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
649	fdchanges [fdchangecnt - 1] = w->fd;
650	}	1632	}
651		1633
652		1634	void noinline
653	void
654	evtimer_start (struct ev_timer *w)	1635	ev_timer_start (EV_P_ ev_timer *w)
655	{	1636	{
656	if (ev_is_active (w))	1637	if (expect_false (ev_is_active (w)))
657	return;	1638	return;
658		1639
659	w->at += now;	1640	((WT)w)->at += mn_now;
660		1641
661	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1642	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
662		1643
663	ev_start ((W)w, ++timercnt);	1644	ev_start (EV_A_ (W)w, ++timercnt);
664	array_needsize (timers, timermax, timercnt, );	1645	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
665	timers [timercnt - 1] = w;	1646	timers [timercnt - 1] = (WT)w;
666	upheap ((WT *)timers, timercnt - 1);	1647	upheap (timers, timercnt - 1);
667	}
668		1648
669	void	1649	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1650	}
		1651
		1652	void noinline
670	evtimer_stop (struct ev_timer *w)	1653	ev_timer_stop (EV_P_ ev_timer *w)
671	{	1654	{
		1655	clear_pending (EV_A_ (W)w);
672	if (!ev_is_active (w))	1656	if (expect_false (!ev_is_active (w)))
673	return;	1657	return;
674		1658
675	if (w->active < timercnt--)	1659	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1660
		1661	{
		1662	int active = ((W)w)->active;
		1663
		1664	if (expect_true (--active < --timercnt))
676	{	1665	{
677	timers [w->active - 1] = timers [timercnt];	1666	timers [active] = timers [timercnt];
678	downheap ((WT *)timers, timercnt, w->active - 1);	1667	adjustheap (timers, timercnt, active);
679	}	1668	}
		1669	}
680		1670
681	w->at = w->repeat;	1671	((WT)w)->at -= mn_now;
682		1672
683	ev_stop ((W)w);	1673	ev_stop (EV_A_ (W)w);
684	}	1674	}
685		1675
686	void	1676	void noinline
687	evtimer_again (struct ev_timer *w)	1677	ev_timer_again (EV_P_ ev_timer *w)
688	{	1678	{
689	if (ev_is_active (w))	1679	if (ev_is_active (w))
690	{	1680	{
691	if (w->repeat)	1681	if (w->repeat)
692	{	1682	{
693	w->at = now + w->repeat;	1683	((WT)w)->at = mn_now + w->repeat;
694	downheap ((WT *)timers, timercnt, w->active - 1);	1684	adjustheap (timers, timercnt, ((W)w)->active - 1);
695	}	1685	}
696	else	1686	else
697	evtimer_stop (w);	1687	ev_timer_stop (EV_A_ w);
698	}	1688	}
699	else if (w->repeat)	1689	else if (w->repeat)
		1690	{
		1691	w->at = w->repeat;
700	evtimer_start (w);	1692	ev_timer_start (EV_A_ w);
		1693	}
701	}	1694	}
702		1695
703	void	1696	#if EV_PERIODIC_ENABLE
		1697	void noinline
704	evperiodic_start (struct ev_periodic *w)	1698	ev_periodic_start (EV_P_ ev_periodic *w)
705	{	1699	{
706	if (ev_is_active (w))	1700	if (expect_false (ev_is_active (w)))
707	return;	1701	return;
708		1702
709	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1703	if (w->reschedule_cb)
710		1704	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1705	else if (w->interval)
		1706	{
		1707	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
711	/* this formula differs from the one in periodic_reify because we do not always round up */	1708	/* this formula differs from the one in periodic_reify because we do not always round up */
712	if (w->interval)
713	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1709	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1710	}
		1711	else
		1712	((WT)w)->at = w->offset;
714		1713
715	ev_start ((W)w, ++periodiccnt);	1714	ev_start (EV_A_ (W)w, ++periodiccnt);
716	array_needsize (periodics, periodicmax, periodiccnt, );	1715	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
717	periodics [periodiccnt - 1] = w;	1716	periodics [periodiccnt - 1] = (WT)w;
718	upheap ((WT *)periodics, periodiccnt - 1);	1717	upheap (periodics, periodiccnt - 1);
719	}
720		1718
721	void	1719	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1720	}
		1721
		1722	void noinline
722	evperiodic_stop (struct ev_periodic *w)	1723	ev_periodic_stop (EV_P_ ev_periodic *w)
723	{	1724	{
		1725	clear_pending (EV_A_ (W)w);
724	if (!ev_is_active (w))	1726	if (expect_false (!ev_is_active (w)))
725	return;	1727	return;
726		1728
727	if (w->active < periodiccnt--)	1729	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1730
		1731	{
		1732	int active = ((W)w)->active;
		1733
		1734	if (expect_true (--active < --periodiccnt))
728	{	1735	{
729	periodics [w->active - 1] = periodics [periodiccnt];	1736	periodics [active] = periodics [periodiccnt];
730	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1737	adjustheap (periodics, periodiccnt, active);
731	}	1738	}
		1739	}
732		1740
733	ev_stop ((W)w);	1741	ev_stop (EV_A_ (W)w);
734	}	1742	}
735		1743
736	void	1744	void noinline
		1745	ev_periodic_again (EV_P_ ev_periodic *w)
		1746	{
		1747	/* TODO: use adjustheap and recalculation */
		1748	ev_periodic_stop (EV_A_ w);
		1749	ev_periodic_start (EV_A_ w);
		1750	}
		1751	#endif
		1752
		1753	#ifndef SA_RESTART
		1754	# define SA_RESTART 0
		1755	#endif
		1756
		1757	void noinline
737	evsignal_start (struct ev_signal *w)	1758	ev_signal_start (EV_P_ ev_signal *w)
738	{	1759	{
		1760	#if EV_MULTIPLICITY
		1761	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1762	#endif
739	if (ev_is_active (w))	1763	if (expect_false (ev_is_active (w)))
740	return;	1764	return;
741		1765
742	ev_start ((W)w, 1);	1766	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1767
		1768	{
		1769	#ifndef _WIN32
		1770	sigset_t full, prev;
		1771	sigfillset (&full);
		1772	sigprocmask (SIG_SETMASK, &full, &prev);
		1773	#endif
		1774
743	array_needsize (signals, signalmax, w->signum, signals_init);	1775	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1776
		1777	#ifndef _WIN32
		1778	sigprocmask (SIG_SETMASK, &prev, 0);
		1779	#endif
		1780	}
		1781
		1782	ev_start (EV_A_ (W)w, 1);
744	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1783	wlist_add (&signals [w->signum - 1].head, (WL)w);
745		1784
746	if (!w->next)	1785	if (!((WL)w)->next)
747	{	1786	{
		1787	#if _WIN32
		1788	signal (w->signum, sighandler);
		1789	#else
748	struct sigaction sa;	1790	struct sigaction sa;
749	sa.sa_handler = sighandler;	1791	sa.sa_handler = sighandler;
750	sigfillset (&sa.sa_mask);	1792	sigfillset (&sa.sa_mask);
751	sa.sa_flags = 0;	1793	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
752	sigaction (w->signum, &sa, 0);	1794	sigaction (w->signum, &sa, 0);
		1795	#endif
753	}	1796	}
754	}	1797	}
755		1798
756	void	1799	void noinline
757	evsignal_stop (struct ev_signal *w)	1800	ev_signal_stop (EV_P_ ev_signal *w)
758	{	1801	{
		1802	clear_pending (EV_A_ (W)w);
759	if (!ev_is_active (w))	1803	if (expect_false (!ev_is_active (w)))
760	return;	1804	return;
761		1805
762	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1806	wlist_del (&signals [w->signum - 1].head, (WL)w);
763	ev_stop ((W)w);	1807	ev_stop (EV_A_ (W)w);
764		1808
765	if (!signals [w->signum - 1].head)	1809	if (!signals [w->signum - 1].head)
766	signal (w->signum, SIG_DFL);	1810	signal (w->signum, SIG_DFL);
767	}	1811	}
768		1812
769	void evidle_start (struct ev_idle *w)	1813	void
		1814	ev_child_start (EV_P_ ev_child *w)
770	{	1815	{
		1816	#if EV_MULTIPLICITY
		1817	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1818	#endif
771	if (ev_is_active (w))	1819	if (expect_false (ev_is_active (w)))
772	return;	1820	return;
773		1821
774	ev_start ((W)w, ++idlecnt);	1822	ev_start (EV_A_ (W)w, 1);
775	array_needsize (idles, idlemax, idlecnt, );	1823	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
776	idles [idlecnt - 1] = w;
777	}	1824	}
778		1825
779	void evidle_stop (struct ev_idle *w)	1826	void
		1827	ev_child_stop (EV_P_ ev_child *w)
780	{	1828	{
781	idles [w->active - 1] = idles [--idlecnt];	1829	clear_pending (EV_A_ (W)w);
		1830	if (expect_false (!ev_is_active (w)))
		1831	return;
		1832
		1833	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
782	ev_stop ((W)w);	1834	ev_stop (EV_A_ (W)w);
783	}	1835	}
784		1836
		1837	#if EV_STAT_ENABLE
		1838
		1839	# ifdef _WIN32
		1840	# undef lstat
		1841	# define lstat(a,b) _stati64 (a,b)
		1842	# endif
		1843
		1844	#define DEF_STAT_INTERVAL 5.0074891
		1845	#define MIN_STAT_INTERVAL 0.1074891
		1846
		1847	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1848
		1849	#if EV_USE_INOTIFY
		1850	# define EV_INOTIFY_BUFSIZE 8192
		1851
		1852	static void noinline
		1853	infy_add (EV_P_ ev_stat *w)
		1854	{
		1855	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);
		1856
		1857	if (w->wd < 0)
		1858	{
		1859	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1860
		1861	/* monitor some parent directory for speedup hints */
		1862	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1863	{
		1864	char path [4096];
		1865	strcpy (path, w->path);
		1866
		1867	do
		1868	{
		1869	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1870	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1871
		1872	char *pend = strrchr (path, '/');
		1873
		1874	if (!pend)
		1875	break; /* whoops, no '/', complain to your admin */
		1876
		1877	*pend = 0;
		1878	w->wd = inotify_add_watch (fs_fd, path, mask);
		1879	}
		1880	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1881	}
		1882	}
		1883	else
		1884	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1885
		1886	if (w->wd >= 0)
		1887	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1888	}
		1889
		1890	static void noinline
		1891	infy_del (EV_P_ ev_stat *w)
		1892	{
		1893	int slot;
		1894	int wd = w->wd;
		1895
		1896	if (wd < 0)
		1897	return;
		1898
		1899	w->wd = -2;
		1900	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1901	wlist_del (&fs_hash [slot].head, (WL)w);
		1902
		1903	/* remove this watcher, if others are watching it, they will rearm */
		1904	inotify_rm_watch (fs_fd, wd);
		1905	}
		1906
		1907	static void noinline
		1908	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1909	{
		1910	if (slot < 0)
		1911	/* overflow, need to check for all hahs slots */
		1912	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1913	infy_wd (EV_A_ slot, wd, ev);
		1914	else
		1915	{
		1916	WL w_;
		1917
		1918	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1919	{
		1920	ev_stat *w = (ev_stat *)w_;
		1921	w_ = w_->next; /* lets us remove this watcher and all before it */
		1922
		1923	if (w->wd == wd || wd == -1)
		1924	{
		1925	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		1926	{
		1927	w->wd = -1;
		1928	infy_add (EV_A_ w); /* re-add, no matter what */
		1929	}
		1930
		1931	stat_timer_cb (EV_A_ &w->timer, 0);
		1932	}
		1933	}
		1934	}
		1935	}
		1936
		1937	static void
		1938	infy_cb (EV_P_ ev_io *w, int revents)
		1939	{
		1940	char buf [EV_INOTIFY_BUFSIZE];
		1941	struct inotify_event *ev = (struct inotify_event *)buf;
		1942	int ofs;
		1943	int len = read (fs_fd, buf, sizeof (buf));
		1944
		1945	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1946	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1947	}
		1948
		1949	void inline_size
		1950	infy_init (EV_P)
		1951	{
		1952	if (fs_fd != -2)
		1953	return;
		1954
		1955	fs_fd = inotify_init ();
		1956
		1957	if (fs_fd >= 0)
		1958	{
		1959	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1960	ev_set_priority (&fs_w, EV_MAXPRI);
		1961	ev_io_start (EV_A_ &fs_w);
		1962	}
		1963	}
		1964
		1965	void inline_size
		1966	infy_fork (EV_P)
		1967	{
		1968	int slot;
		1969
		1970	if (fs_fd < 0)
		1971	return;
		1972
		1973	close (fs_fd);
		1974	fs_fd = inotify_init ();
		1975
		1976	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1977	{
		1978	WL w_ = fs_hash [slot].head;
		1979	fs_hash [slot].head = 0;
		1980
		1981	while (w_)
		1982	{
		1983	ev_stat *w = (ev_stat *)w_;
		1984	w_ = w_->next; /* lets us add this watcher */
		1985
		1986	w->wd = -1;
		1987
		1988	if (fs_fd >= 0)
		1989	infy_add (EV_A_ w); /* re-add, no matter what */
		1990	else
		1991	ev_timer_start (EV_A_ &w->timer);
		1992	}
		1993
		1994	}
		1995	}
		1996
		1997	#endif
		1998
		1999	void
		2000	ev_stat_stat (EV_P_ ev_stat *w)
		2001	{
		2002	if (lstat (w->path, &w->attr) < 0)
		2003	w->attr.st_nlink = 0;
		2004	else if (!w->attr.st_nlink)
		2005	w->attr.st_nlink = 1;
		2006	}
		2007
		2008	static void noinline
		2009	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2010	{
		2011	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2012
		2013	/* we copy this here each the time so that */
		2014	/* prev has the old value when the callback gets invoked */
		2015	w->prev = w->attr;
		2016	ev_stat_stat (EV_A_ w);
		2017
		2018	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2019	if (
		2020	w->prev.st_dev != w->attr.st_dev
		2021	|| w->prev.st_ino != w->attr.st_ino
		2022	|| w->prev.st_mode != w->attr.st_mode
		2023	|| w->prev.st_nlink != w->attr.st_nlink
		2024	|| w->prev.st_uid != w->attr.st_uid
		2025	|| w->prev.st_gid != w->attr.st_gid
		2026	|| w->prev.st_rdev != w->attr.st_rdev
		2027	|| w->prev.st_size != w->attr.st_size
		2028	|| w->prev.st_atime != w->attr.st_atime
		2029	|| w->prev.st_mtime != w->attr.st_mtime
		2030	|| w->prev.st_ctime != w->attr.st_ctime
		2031	) {
		2032	#if EV_USE_INOTIFY
		2033	infy_del (EV_A_ w);
		2034	infy_add (EV_A_ w);
		2035	ev_stat_stat (EV_A_ w); /* avoid race... */
		2036	#endif
		2037
		2038	ev_feed_event (EV_A_ w, EV_STAT);
		2039	}
		2040	}
		2041
		2042	void
		2043	ev_stat_start (EV_P_ ev_stat *w)
		2044	{
		2045	if (expect_false (ev_is_active (w)))
		2046	return;
		2047
		2048	/* since we use memcmp, we need to clear any padding data etc. */
		2049	memset (&w->prev, 0, sizeof (ev_statdata));
		2050	memset (&w->attr, 0, sizeof (ev_statdata));
		2051
		2052	ev_stat_stat (EV_A_ w);
		2053
		2054	if (w->interval < MIN_STAT_INTERVAL)
		2055	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2056
		2057	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2058	ev_set_priority (&w->timer, ev_priority (w));
		2059
		2060	#if EV_USE_INOTIFY
		2061	infy_init (EV_A);
		2062
		2063	if (fs_fd >= 0)
		2064	infy_add (EV_A_ w);
		2065	else
		2066	#endif
		2067	ev_timer_start (EV_A_ &w->timer);
		2068
		2069	ev_start (EV_A_ (W)w, 1);
		2070	}
		2071
		2072	void
		2073	ev_stat_stop (EV_P_ ev_stat *w)
		2074	{
		2075	clear_pending (EV_A_ (W)w);
		2076	if (expect_false (!ev_is_active (w)))
		2077	return;
		2078
		2079	#if EV_USE_INOTIFY
		2080	infy_del (EV_A_ w);
		2081	#endif
		2082	ev_timer_stop (EV_A_ &w->timer);
		2083
		2084	ev_stop (EV_A_ (W)w);
		2085	}
		2086	#endif
		2087
		2088	#if EV_IDLE_ENABLE
		2089	void
		2090	ev_idle_start (EV_P_ ev_idle *w)
		2091	{
		2092	if (expect_false (ev_is_active (w)))
		2093	return;
		2094
		2095	pri_adjust (EV_A_ (W)w);
		2096
		2097	{
		2098	int active = ++idlecnt [ABSPRI (w)];
		2099
		2100	++idleall;
		2101	ev_start (EV_A_ (W)w, active);
		2102
		2103	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2104	idles [ABSPRI (w)][active - 1] = w;
		2105	}
		2106	}
		2107
		2108	void
		2109	ev_idle_stop (EV_P_ ev_idle *w)
		2110	{
		2111	clear_pending (EV_A_ (W)w);
		2112	if (expect_false (!ev_is_active (w)))
		2113	return;
		2114
		2115	{
		2116	int active = ((W)w)->active;
		2117
		2118	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2119	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2120
		2121	ev_stop (EV_A_ (W)w);
		2122	--idleall;
		2123	}
		2124	}
		2125	#endif
		2126
		2127	void
		2128	ev_prepare_start (EV_P_ ev_prepare *w)
		2129	{
		2130	if (expect_false (ev_is_active (w)))
		2131	return;
		2132
		2133	ev_start (EV_A_ (W)w, ++preparecnt);
		2134	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2135	prepares [preparecnt - 1] = w;
		2136	}
		2137
		2138	void
		2139	ev_prepare_stop (EV_P_ ev_prepare *w)
		2140	{
		2141	clear_pending (EV_A_ (W)w);
		2142	if (expect_false (!ev_is_active (w)))
		2143	return;
		2144
		2145	{
		2146	int active = ((W)w)->active;
		2147	prepares [active - 1] = prepares [--preparecnt];
		2148	((W)prepares [active - 1])->active = active;
		2149	}
		2150
		2151	ev_stop (EV_A_ (W)w);
		2152	}
		2153
		2154	void
785	void evcheck_start (struct ev_check *w)	2155	ev_check_start (EV_P_ ev_check *w)
786	{	2156	{
787	if (ev_is_active (w))	2157	if (expect_false (ev_is_active (w)))
788	return;	2158	return;
789		2159
790	ev_start ((W)w, ++checkcnt);	2160	ev_start (EV_A_ (W)w, ++checkcnt);
791	array_needsize (checks, checkmax, checkcnt, );	2161	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
792	checks [checkcnt - 1] = w;	2162	checks [checkcnt - 1] = w;
793	}	2163	}
794		2164
		2165	void
795	void evcheck_stop (struct ev_check *w)	2166	ev_check_stop (EV_P_ ev_check *w)
796	{	2167	{
		2168	clear_pending (EV_A_ (W)w);
		2169	if (expect_false (!ev_is_active (w)))
		2170	return;
		2171
		2172	{
		2173	int active = ((W)w)->active;
797	checks [w->active - 1] = checks [--checkcnt];	2174	checks [active - 1] = checks [--checkcnt];
		2175	((W)checks [active - 1])->active = active;
		2176	}
		2177
798	ev_stop ((W)w);	2178	ev_stop (EV_A_ (W)w);
799	}	2179	}
		2180
		2181	#if EV_EMBED_ENABLE
		2182	void noinline
		2183	ev_embed_sweep (EV_P_ ev_embed *w)
		2184	{
		2185	ev_loop (w->loop, EVLOOP_NONBLOCK);
		2186	}
		2187
		2188	static void
		2189	embed_cb (EV_P_ ev_io *io, int revents)
		2190	{
		2191	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2192
		2193	if (ev_cb (w))
		2194	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2195	else
		2196	ev_embed_sweep (loop, w);
		2197	}
		2198
		2199	void
		2200	ev_embed_start (EV_P_ ev_embed *w)
		2201	{
		2202	if (expect_false (ev_is_active (w)))
		2203	return;
		2204
		2205	{
		2206	struct ev_loop *loop = w->loop;
		2207	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2208	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		2209	}
		2210
		2211	ev_set_priority (&w->io, ev_priority (w));
		2212	ev_io_start (EV_A_ &w->io);
		2213
		2214	ev_start (EV_A_ (W)w, 1);
		2215	}
		2216
		2217	void
		2218	ev_embed_stop (EV_P_ ev_embed *w)
		2219	{
		2220	clear_pending (EV_A_ (W)w);
		2221	if (expect_false (!ev_is_active (w)))
		2222	return;
		2223
		2224	ev_io_stop (EV_A_ &w->io);
		2225
		2226	ev_stop (EV_A_ (W)w);
		2227	}
		2228	#endif
		2229
		2230	#if EV_FORK_ENABLE
		2231	void
		2232	ev_fork_start (EV_P_ ev_fork *w)
		2233	{
		2234	if (expect_false (ev_is_active (w)))
		2235	return;
		2236
		2237	ev_start (EV_A_ (W)w, ++forkcnt);
		2238	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2239	forks [forkcnt - 1] = w;
		2240	}
		2241
		2242	void
		2243	ev_fork_stop (EV_P_ ev_fork *w)
		2244	{
		2245	clear_pending (EV_A_ (W)w);
		2246	if (expect_false (!ev_is_active (w)))
		2247	return;
		2248
		2249	{
		2250	int active = ((W)w)->active;
		2251	forks [active - 1] = forks [--forkcnt];
		2252	((W)forks [active - 1])->active = active;
		2253	}
		2254
		2255	ev_stop (EV_A_ (W)w);
		2256	}
		2257	#endif
800		2258
801	/*****************************************************************************/	2259	/*****************************************************************************/
802		2260
803	#if 0	2261	struct ev_once
804		2262	{
805	struct ev_io wio;	2263	ev_io io;
		2264	ev_timer to;
		2265	void (*cb)(int revents, void *arg);
		2266	void *arg;
		2267	};
806		2268
807	static void	2269	static void
808	sin_cb (struct ev_io *w, int revents)	2270	once_cb (EV_P_ struct ev_once *once, int revents)
809	{	2271	{
810	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2272	void (*cb)(int revents, void *arg) = once->cb;
		2273	void *arg = once->arg;
		2274
		2275	ev_io_stop (EV_A_ &once->io);
		2276	ev_timer_stop (EV_A_ &once->to);
		2277	ev_free (once);
		2278
		2279	cb (revents, arg);
811	}	2280	}
812		2281
813	static void	2282	static void
814	ocb (struct ev_timer *w, int revents)	2283	once_cb_io (EV_P_ ev_io *w, int revents)
815	{	2284	{
816	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2285	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
817	evtimer_stop (w);
818	evtimer_start (w);
819	}	2286	}
820		2287
821	static void	2288	static void
822	scb (struct ev_signal *w, int revents)	2289	once_cb_to (EV_P_ ev_timer *w, int revents)
823	{	2290	{
824	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	2291	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
825	evio_stop (&wio);
826	evio_start (&wio);
827	}	2292	}
828		2293
829	static void	2294	void
830	gcb (struct ev_signal *w, int revents)	2295	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
831	{	2296	{
832	fprintf (stderr, "generic %x\n", revents);	2297	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
833		2298
834	}	2299	if (expect_false (!once))
835
836	int main (void)
837	{
838	ev_init (0);
839
840	evio_init (&wio, sin_cb, 0, EV_READ);
841	evio_start (&wio);
842
843	struct ev_timer t[10000];
844
845	#if 0
846	int i;
847	for (i = 0; i < 10000; ++i)
848	{
849	struct ev_timer *w = t + i;
850	evw_init (w, ocb, i);
851	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
852	evtimer_start (w);
853	if (drand48 () < 0.5)
854	evtimer_stop (w);
855	}	2300	{
856	#endif	2301	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
857
858	struct ev_timer t1;
859	evtimer_init (&t1, ocb, 5, 10);
860	evtimer_start (&t1);
861
862	struct ev_signal sig;
863	evsignal_init (&sig, scb, SIGQUIT);
864	evsignal_start (&sig);
865
866	struct ev_check cw;
867	evcheck_init (&cw, gcb);
868	evcheck_start (&cw);
869
870	struct ev_idle iw;
871	evidle_init (&iw, gcb);
872	evidle_start (&iw);
873
874	ev_loop (0);
875
876	return 0;	2302	return;
877	}	2303	}
878		2304
879	#endif	2305	once->cb = cb;
		2306	once->arg = arg;
880		2307
		2308	ev_init (&once->io, once_cb_io);
		2309	if (fd >= 0)
		2310	{
		2311	ev_io_set (&once->io, fd, events);
		2312	ev_io_start (EV_A_ &once->io);
		2313	}
881		2314
		2315	ev_init (&once->to, once_cb_to);
		2316	if (timeout >= 0.)
		2317	{
		2318	ev_timer_set (&once->to, timeout, 0.);
		2319	ev_timer_start (EV_A_ &once->to);
		2320	}
		2321	}
882		2322
		2323	#ifdef __cplusplus
		2324	}
		2325	#endif
883		2326

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