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Comparing libev/ev.c (file contents):
Revision 1.14 by root, Wed Oct 31 11:52:12 2007 UTC vs.
Revision 1.177 by root, Tue Dec 11 15:06:50 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_SELECT_IS_WINSOCKET
		208	# include <winsock.h>
		209	#endif
		210
		211	#if !EV_STAT_ENABLE
		212	# define EV_USE_INOTIFY 0
		213	#endif
		214
		215	#if EV_USE_INOTIFY
		216	# include <sys/inotify.h>
		217	#endif
		218
		219	/**/
		220
		221	/*
		222	* This is used to avoid floating point rounding problems.
		223	* It is added to ev_rt_now when scheduling periodics
		224	* to ensure progress, time-wise, even when rounding
		225	* errors are against us.
		226	* This value is good at least till the year 4000.
		227	* Better solutions welcome.
		228	*/
		229	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
33		230
34	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	231	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
35	#define MAX_BLOCKTIME 60.	232	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		233	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
36		234
37	#include "ev.h"	235	#if __GNUC__ >= 3
		236	# define expect(expr,value) __builtin_expect ((expr),(value))
		237	# define noinline __attribute__ ((noinline))
		238	#else
		239	# define expect(expr,value) (expr)
		240	# define noinline
		241	# if __STDC_VERSION__ < 199901L
		242	# define inline
		243	# endif
		244	#endif
38		245
		246	#define expect_false(expr) expect ((expr) != 0, 0)
		247	#define expect_true(expr) expect ((expr) != 0, 1)
		248	#define inline_size static inline
		249
		250	#if EV_MINIMAL
		251	# define inline_speed static noinline
		252	#else
		253	# define inline_speed static inline
		254	#endif
		255
		256	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		257	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		258
		259	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		260	#define EMPTY2(a,b) /* used to suppress some warnings */
		261
39	typedef struct ev_watcher *W;	262	typedef ev_watcher *W;
40	typedef struct ev_watcher_list *WL;	263	typedef ev_watcher_list *WL;
41	typedef struct ev_watcher_time *WT;	264	typedef ev_watcher_time *WT;
42		265
43	static ev_tstamp now, diff; /* monotonic clock */	266	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		267
		268	#ifdef _WIN32
		269	# include "ev_win32.c"
		270	#endif
		271
		272	/*****************************************************************************/
		273
		274	static void (*syserr_cb)(const char *msg);
		275
		276	void
		277	ev_set_syserr_cb (void (*cb)(const char *msg))
		278	{
		279	syserr_cb = cb;
		280	}
		281
		282	static void noinline
		283	syserr (const char *msg)
		284	{
		285	if (!msg)
		286	msg = "(libev) system error";
		287
		288	if (syserr_cb)
		289	syserr_cb (msg);
		290	else
		291	{
		292	perror (msg);
		293	abort ();
		294	}
		295	}
		296
		297	static void *(*alloc)(void *ptr, long size);
		298
		299	void
		300	ev_set_allocator (void *(*cb)(void *ptr, long size))
		301	{
		302	alloc = cb;
		303	}
		304
		305	inline_speed void *
		306	ev_realloc (void *ptr, long size)
		307	{
		308	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		309
		310	if (!ptr && size)
		311	{
		312	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		313	abort ();
		314	}
		315
		316	return ptr;
		317	}
		318
		319	#define ev_malloc(size) ev_realloc (0, (size))
		320	#define ev_free(ptr) ev_realloc ((ptr), 0)
		321
		322	/*****************************************************************************/
		323
		324	typedef struct
		325	{
		326	WL head;
		327	unsigned char events;
		328	unsigned char reify;
		329	#if EV_SELECT_IS_WINSOCKET
		330	SOCKET handle;
		331	#endif
		332	} ANFD;
		333
		334	typedef struct
		335	{
		336	W w;
		337	int events;
		338	} ANPENDING;
		339
		340	#if EV_USE_INOTIFY
		341	typedef struct
		342	{
		343	WL head;
		344	} ANFS;
		345	#endif
		346
		347	#if EV_MULTIPLICITY
		348
		349	struct ev_loop
		350	{
		351	ev_tstamp ev_rt_now;
		352	#define ev_rt_now ((loop)->ev_rt_now)
		353	#define VAR(name,decl) decl;
		354	#include "ev_vars.h"
		355	#undef VAR
		356	};
		357	#include "ev_wrap.h"
		358
		359	static struct ev_loop default_loop_struct;
		360	struct ev_loop *ev_default_loop_ptr;
		361
		362	#else
		363
44	ev_tstamp ev_now;	364	ev_tstamp ev_rt_now;
45	int ev_method;	365	#define VAR(name,decl) static decl;
		366	#include "ev_vars.h"
		367	#undef VAR
46		368
47	static int have_monotonic; /* runtime */	369	static int ev_default_loop_ptr;
48		370
49	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	371	#endif
50	static void (*method_modify)(int fd, int oev, int nev);
51	static void (*method_poll)(ev_tstamp timeout);
52		372
53	/*****************************************************************************/	373	/*****************************************************************************/
54		374
55	ev_tstamp	375	ev_tstamp
56	ev_time (void)	376	ev_time (void)
57	{	377	{
58	#if HAVE_REALTIME	378	#if EV_USE_REALTIME
59	struct timespec ts;	379	struct timespec ts;
60	clock_gettime (CLOCK_REALTIME, &ts);	380	clock_gettime (CLOCK_REALTIME, &ts);
61	return ts.tv_sec + ts.tv_nsec * 1e-9;	381	return ts.tv_sec + ts.tv_nsec * 1e-9;
62	#else	382	#else
63	struct timeval tv;	383	struct timeval tv;
64	gettimeofday (&tv, 0);	384	gettimeofday (&tv, 0);
65	return tv.tv_sec + tv.tv_usec * 1e-6;	385	return tv.tv_sec + tv.tv_usec * 1e-6;
66	#endif	386	#endif
67	}	387	}
68		388
69	static ev_tstamp	389	ev_tstamp inline_size
70	get_clock (void)	390	get_clock (void)
71	{	391	{
72	#if HAVE_MONOTONIC	392	#if EV_USE_MONOTONIC
73	if (have_monotonic)	393	if (expect_true (have_monotonic))
74	{	394	{
75	struct timespec ts;	395	struct timespec ts;
76	clock_gettime (CLOCK_MONOTONIC, &ts);	396	clock_gettime (CLOCK_MONOTONIC, &ts);
77	return ts.tv_sec + ts.tv_nsec * 1e-9;	397	return ts.tv_sec + ts.tv_nsec * 1e-9;
78	}	398	}
79	#endif	399	#endif
80		400
81	return ev_time ();	401	return ev_time ();
82	}	402	}
83		403
		404	#if EV_MULTIPLICITY
		405	ev_tstamp
		406	ev_now (EV_P)
		407	{
		408	return ev_rt_now;
		409	}
		410	#endif
		411
		412	int inline_size
		413	array_nextsize (int elem, int cur, int cnt)
		414	{
		415	int ncur = cur + 1;
		416
		417	do
		418	ncur <<= 1;
		419	while (cnt > ncur);
		420
		421	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		422	if (elem * ncur > 4096)
		423	{
		424	ncur *= elem;
		425	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		426	ncur = ncur - sizeof (void *) * 4;
		427	ncur /= elem;
		428	}
		429
		430	return ncur;
		431	}
		432
		433	static noinline void *
		434	array_realloc (int elem, void *base, int *cur, int cnt)
		435	{
		436	*cur = array_nextsize (elem, *cur, cnt);
		437	return ev_realloc (base, elem * *cur);
		438	}
		439
84	#define array_needsize(base,cur,cnt,init) \	440	#define array_needsize(type,base,cur,cnt,init) \
85	if ((cnt) > cur) \	441	if (expect_false ((cnt) > (cur))) \
86	{ \	442	{ \
87	int newcnt = cur ? cur << 1 : 16; \	443	int ocur_ = (cur); \
88	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	444	(base) = (type *)array_realloc \
89	base = realloc (base, sizeof (*base) * (newcnt)); \	445	(sizeof (type), (base), &(cur), (cnt)); \
90	init (base + cur, newcnt - cur); \	446	init ((base) + (ocur_), (cur) - ocur_); \
91	cur = newcnt; \
92	}	447	}
		448
		449	#if 0
		450	#define array_slim(type,stem) \
		451	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		452	{ \
		453	stem ## max = array_roundsize (stem ## cnt >> 1); \
		454	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		455	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		456	}
		457	#endif
		458
		459	#define array_free(stem, idx) \
		460	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
93		461
94	/*****************************************************************************/	462	/*****************************************************************************/
95		463
		464	void noinline
		465	ev_feed_event (EV_P_ void *w, int revents)
		466	{
		467	W w_ = (W)w;
		468	int pri = ABSPRI (w_);
		469
		470	if (expect_false (w_->pending))
		471	pendings [pri][w_->pending - 1].events |= revents;
		472	else
		473	{
		474	w_->pending = ++pendingcnt [pri];
		475	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		476	pendings [pri][w_->pending - 1].w = w_;
		477	pendings [pri][w_->pending - 1].events = revents;
		478	}
		479	}
		480
		481	void inline_size
		482	queue_events (EV_P_ W *events, int eventcnt, int type)
		483	{
		484	int i;
		485
		486	for (i = 0; i < eventcnt; ++i)
		487	ev_feed_event (EV_A_ events [i], type);
		488	}
		489
		490	/*****************************************************************************/
		491
		492	void inline_size
		493	anfds_init (ANFD *base, int count)
		494	{
		495	while (count--)
		496	{
		497	base->head = 0;
		498	base->events = EV_NONE;
		499	base->reify = 0;
		500
		501	++base;
		502	}
		503	}
		504
		505	void inline_speed
		506	fd_event (EV_P_ int fd, int revents)
		507	{
		508	ANFD *anfd = anfds + fd;
		509	ev_io *w;
		510
		511	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		512	{
		513	int ev = w->events & revents;
		514
		515	if (ev)
		516	ev_feed_event (EV_A_ (W)w, ev);
		517	}
		518	}
		519
		520	void
		521	ev_feed_fd_event (EV_P_ int fd, int revents)
		522	{
		523	if (fd >= 0 && fd < anfdmax)
		524	fd_event (EV_A_ fd, revents);
		525	}
		526
		527	void inline_size
		528	fd_reify (EV_P)
		529	{
		530	int i;
		531
		532	for (i = 0; i < fdchangecnt; ++i)
		533	{
		534	int fd = fdchanges [i];
		535	ANFD *anfd = anfds + fd;
		536	ev_io *w;
		537
		538	int events = 0;
		539
		540	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		541	events |= w->events;
		542
		543	#if EV_SELECT_IS_WINSOCKET
		544	if (events)
		545	{
		546	unsigned long argp;
		547	anfd->handle = _get_osfhandle (fd);
		548	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		549	}
		550	#endif
		551
		552	anfd->reify = 0;
		553
		554	backend_modify (EV_A_ fd, anfd->events, events);
		555	anfd->events = events;
		556	}
		557
		558	fdchangecnt = 0;
		559	}
		560
		561	void inline_size
		562	fd_change (EV_P_ int fd)
		563	{
		564	if (expect_false (anfds [fd].reify))
		565	return;
		566
		567	anfds [fd].reify = 1;
		568
		569	++fdchangecnt;
		570	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		571	fdchanges [fdchangecnt - 1] = fd;
		572	}
		573
		574	void inline_speed
		575	fd_kill (EV_P_ int fd)
		576	{
		577	ev_io *w;
		578
		579	while ((w = (ev_io *)anfds [fd].head))
		580	{
		581	ev_io_stop (EV_A_ w);
		582	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		583	}
		584	}
		585
		586	int inline_size
		587	fd_valid (int fd)
		588	{
		589	#ifdef _WIN32
		590	return _get_osfhandle (fd) != -1;
		591	#else
		592	return fcntl (fd, F_GETFD) != -1;
		593	#endif
		594	}
		595
		596	/* called on EBADF to verify fds */
		597	static void noinline
		598	fd_ebadf (EV_P)
		599	{
		600	int fd;
		601
		602	for (fd = 0; fd < anfdmax; ++fd)
		603	if (anfds [fd].events)
		604	if (!fd_valid (fd) == -1 && errno == EBADF)
		605	fd_kill (EV_A_ fd);
		606	}
		607
		608	/* called on ENOMEM in select/poll to kill some fds and retry */
		609	static void noinline
		610	fd_enomem (EV_P)
		611	{
		612	int fd;
		613
		614	for (fd = anfdmax; fd--; )
		615	if (anfds [fd].events)
		616	{
		617	fd_kill (EV_A_ fd);
		618	return;
		619	}
		620	}
		621
		622	/* usually called after fork if backend needs to re-arm all fds from scratch */
		623	static void noinline
		624	fd_rearm_all (EV_P)
		625	{
		626	int fd;
		627
		628	for (fd = 0; fd < anfdmax; ++fd)
		629	if (anfds [fd].events)
		630	{
		631	anfds [fd].events = 0;
		632	fd_change (EV_A_ fd);
		633	}
		634	}
		635
		636	/*****************************************************************************/
		637
		638	void inline_speed
		639	upheap (WT *heap, int k)
		640	{
		641	WT w = heap [k];
		642
		643	while (k && heap [k >> 1]->at > w->at)
		644	{
		645	heap [k] = heap [k >> 1];
		646	((W)heap [k])->active = k + 1;
		647	k >>= 1;
		648	}
		649
		650	heap [k] = w;
		651	((W)heap [k])->active = k + 1;
		652
		653	}
		654
		655	void inline_speed
		656	downheap (WT *heap, int N, int k)
		657	{
		658	WT w = heap [k];
		659
		660	while (k < (N >> 1))
		661	{
		662	int j = k << 1;
		663
		664	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		665	++j;
		666
		667	if (w->at <= heap [j]->at)
		668	break;
		669
		670	heap [k] = heap [j];
		671	((W)heap [k])->active = k + 1;
		672	k = j;
		673	}
		674
		675	heap [k] = w;
		676	((W)heap [k])->active = k + 1;
		677	}
		678
		679	void inline_size
		680	adjustheap (WT *heap, int N, int k)
		681	{
		682	upheap (heap, k);
		683	downheap (heap, N, k);
		684	}
		685
		686	/*****************************************************************************/
		687
96	typedef struct	688	typedef struct
97	{	689	{
98	struct ev_io *head;	690	WL head;
99	unsigned char wev, rev; /* want, received event set */
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	w->pending = ++pendingcnt;
132	array_needsize (pendings, pendingmax, pendingcnt, );
133	pendings [pendingcnt - 1].w = w;
134	pendings [pendingcnt - 1].events = events;
135	}
136
137	static void
138	fd_event (int fd, int events)
139	{
140	ANFD *anfd = anfds + fd;
141	struct ev_io *w;
142
143	for (w = anfd->head; w; w = w->next)
144	{
145	int ev = w->events & events;
146
147	if (ev)
148	event ((W)w, ev);
149	}
150	}
151
152	static void
153	queue_events (W *events, int eventcnt, int type)
154	{
155	int i;
156
157	for (i = 0; i < eventcnt; ++i)
158	event (events [i], type);
159	}
160
161	/*****************************************************************************/
162
163	static struct ev_timer **timers;
164	static int timermax, timercnt;
165
166	static struct ev_periodic **periodics;
167	static int periodicmax, periodiccnt;
168
169	static void
170	upheap (WT *timers, int k)
171	{
172	WT w = timers [k];
173
174	while (k && timers [k >> 1]->at > w->at)
175	{
176	timers [k] = timers [k >> 1];
177	timers [k]->active = k + 1;
178	k >>= 1;
179	}
180
181	timers [k] = w;
182	timers [k]->active = k + 1;
183
184	}
185
186	static void
187	downheap (WT *timers, int N, int k)
188	{
189	WT w = timers [k];
190
191	while (k < (N >> 1))
192	{
193	int j = k << 1;
194
195	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
196	++j;
197
198	if (w->at <= timers [j]->at)
199	break;
200
201	timers [k] = timers [j];
202	timers [k]->active = k + 1;
203	k = j;
204	}
205
206	timers [k] = w;
207	timers [k]->active = k + 1;
208	}
209
210	/*****************************************************************************/
211
212	typedef struct
213	{
214	struct ev_signal *head;
215	sig_atomic_t gotsig;	691	sig_atomic_t volatile gotsig;
216	} ANSIG;	692	} ANSIG;
217		693
218	static ANSIG *signals;	694	static ANSIG *signals;
219	static int signalmax;	695	static int signalmax;
220		696
221	static int sigpipe [2];	697	static int sigpipe [2];
222	static sig_atomic_t gotsig;	698	static sig_atomic_t volatile gotsig;
223	static struct ev_io sigev;	699	static ev_io sigev;
224		700
225	static void	701	void inline_size
226	signals_init (ANSIG *base, int count)	702	signals_init (ANSIG *base, int count)
227	{	703	{
228	while (count--)	704	while (count--)
229	{	705	{
230	base->head = 0;	706	base->head = 0;
231	base->gotsig = 0;	707	base->gotsig = 0;
		708
232	++base;	709	++base;
233	}	710	}
234	}	711	}
235		712
236	static void	713	static void
237	sighandler (int signum)	714	sighandler (int signum)
238	{	715	{
		716	#if _WIN32
		717	signal (signum, sighandler);
		718	#endif
		719
239	signals [signum - 1].gotsig = 1;	720	signals [signum - 1].gotsig = 1;
240		721
241	if (!gotsig)	722	if (!gotsig)
242	{	723	{
		724	int old_errno = errno;
243	gotsig = 1;	725	gotsig = 1;
244	write (sigpipe [1], &gotsig, 1);	726	write (sigpipe [1], &signum, 1);
		727	errno = old_errno;
245	}	728	}
		729	}
		730
		731	void noinline
		732	ev_feed_signal_event (EV_P_ int signum)
		733	{
		734	WL w;
		735
		736	#if EV_MULTIPLICITY
		737	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		738	#endif
		739
		740	--signum;
		741
		742	if (signum < 0 || signum >= signalmax)
		743	return;
		744
		745	signals [signum].gotsig = 0;
		746
		747	for (w = signals [signum].head; w; w = w->next)
		748	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
246	}	749	}
247		750
248	static void	751	static void
249	sigcb (struct ev_io *iow, int revents)	752	sigcb (EV_P_ ev_io *iow, int revents)
250	{	753	{
251	struct ev_signal *w;
252	int sig;	754	int signum;
253		755
		756	read (sigpipe [0], &revents, 1);
254	gotsig = 0;	757	gotsig = 0;
255	read (sigpipe [0], &revents, 1);
256		758
257	for (sig = signalmax; sig--; )	759	for (signum = signalmax; signum--; )
258	if (signals [sig].gotsig)	760	if (signals [signum].gotsig)
		761	ev_feed_signal_event (EV_A_ signum + 1);
		762	}
		763
		764	void inline_speed
		765	fd_intern (int fd)
		766	{
		767	#ifdef _WIN32
		768	int arg = 1;
		769	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		770	#else
		771	fcntl (fd, F_SETFD, FD_CLOEXEC);
		772	fcntl (fd, F_SETFL, O_NONBLOCK);
		773	#endif
		774	}
		775
		776	static void noinline
		777	siginit (EV_P)
		778	{
		779	fd_intern (sigpipe [0]);
		780	fd_intern (sigpipe [1]);
		781
		782	ev_io_set (&sigev, sigpipe [0], EV_READ);
		783	ev_io_start (EV_A_ &sigev);
		784	ev_unref (EV_A); /* child watcher should not keep loop alive */
		785	}
		786
		787	/*****************************************************************************/
		788
		789	static ev_child *childs [EV_PID_HASHSIZE];
		790
		791	#ifndef _WIN32
		792
		793	static ev_signal childev;
		794
		795	void inline_speed
		796	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		797	{
		798	ev_child *w;
		799
		800	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		801	if (w->pid == pid || !w->pid)
259	{	802	{
260	signals [sig].gotsig = 0;	803	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
261		804	w->rpid = pid;
262	for (w = signals [sig].head; w; w = w->next)	805	w->rstatus = status;
263	event ((W)w, EV_SIGNAL);	806	ev_feed_event (EV_A_ (W)w, EV_CHILD);
264	}	807	}
265	}	808	}
266		809
		810	#ifndef WCONTINUED
		811	# define WCONTINUED 0
		812	#endif
		813
267	static void	814	static void
268	siginit (void)	815	childcb (EV_P_ ev_signal *sw, int revents)
269	{	816	{
270	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	817	int pid, status;
271	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
272		818
273	/* rather than sort out wether we really need nb, set it */	819	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
274	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	820	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
275	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	821	if (!WCONTINUED
		822	|| errno != EINVAL
		823	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		824	return;
276		825
277	evio_set (&sigev, sigpipe [0], EV_READ);	826	/* make sure we are called again until all childs have been reaped */
278	evio_start (&sigev);	827	/* we need to do it this way so that the callback gets called before we continue */
		828	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		829
		830	child_reap (EV_A_ sw, pid, pid, status);
		831	if (EV_PID_HASHSIZE > 1)
		832	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
279	}	833	}
		834
		835	#endif
280		836
281	/*****************************************************************************/	837	/*****************************************************************************/
282		838
283	static struct ev_idle **idles;	839	#if EV_USE_PORT
284	static int idlemax, idlecnt;	840	# include "ev_port.c"
		841	#endif
		842	#if EV_USE_KQUEUE
		843	# include "ev_kqueue.c"
		844	#endif
		845	#if EV_USE_EPOLL
		846	# include "ev_epoll.c"
		847	#endif
		848	#if EV_USE_POLL
		849	# include "ev_poll.c"
		850	#endif
		851	#if EV_USE_SELECT
		852	# include "ev_select.c"
		853	#endif
285		854
286	static struct ev_check **checks;	855	int
287	static int checkmax, checkcnt;	856	ev_version_major (void)
		857	{
		858	return EV_VERSION_MAJOR;
		859	}
		860
		861	int
		862	ev_version_minor (void)
		863	{
		864	return EV_VERSION_MINOR;
		865	}
		866
		867	/* return true if we are running with elevated privileges and should ignore env variables */
		868	int inline_size
		869	enable_secure (void)
		870	{
		871	#ifdef _WIN32
		872	return 0;
		873	#else
		874	return getuid () != geteuid ()
		875	|| getgid () != getegid ();
		876	#endif
		877	}
		878
		879	unsigned int
		880	ev_supported_backends (void)
		881	{
		882	unsigned int flags = 0;
		883
		884	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		885	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		886	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		887	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		888	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		889
		890	return flags;
		891	}
		892
		893	unsigned int
		894	ev_recommended_backends (void)
		895	{
		896	unsigned int flags = ev_supported_backends ();
		897
		898	#ifndef __NetBSD__
		899	/* kqueue is borked on everything but netbsd apparently */
		900	/* it usually doesn't work correctly on anything but sockets and pipes */
		901	flags &= ~EVBACKEND_KQUEUE;
		902	#endif
		903	#ifdef __APPLE__
		904	// flags &= ~EVBACKEND_KQUEUE; for documentation
		905	flags &= ~EVBACKEND_POLL;
		906	#endif
		907
		908	return flags;
		909	}
		910
		911	unsigned int
		912	ev_embeddable_backends (void)
		913	{
		914	return EVBACKEND_EPOLL
		915	| EVBACKEND_KQUEUE
		916	| EVBACKEND_PORT;
		917	}
		918
		919	unsigned int
		920	ev_backend (EV_P)
		921	{
		922	return backend;
		923	}
		924
		925	unsigned int
		926	ev_loop_count (EV_P)
		927	{
		928	return loop_count;
		929	}
		930
		931	static void noinline
		932	loop_init (EV_P_ unsigned int flags)
		933	{
		934	if (!backend)
		935	{
		936	#if EV_USE_MONOTONIC
		937	{
		938	struct timespec ts;
		939	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		940	have_monotonic = 1;
		941	}
		942	#endif
		943
		944	ev_rt_now = ev_time ();
		945	mn_now = get_clock ();
		946	now_floor = mn_now;
		947	rtmn_diff = ev_rt_now - mn_now;
		948
		949	/* pid check not overridable via env */
		950	#ifndef _WIN32
		951	if (flags & EVFLAG_FORKCHECK)
		952	curpid = getpid ();
		953	#endif
		954
		955	if (!(flags & EVFLAG_NOENV)
		956	&& !enable_secure ()
		957	&& getenv ("LIBEV_FLAGS"))
		958	flags = atoi (getenv ("LIBEV_FLAGS"));
		959
		960	if (!(flags & 0x0000ffffUL))
		961	flags |= ev_recommended_backends ();
		962
		963	backend = 0;
		964	backend_fd = -1;
		965	#if EV_USE_INOTIFY
		966	fs_fd = -2;
		967	#endif
		968
		969	#if EV_USE_PORT
		970	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		971	#endif
		972	#if EV_USE_KQUEUE
		973	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		974	#endif
		975	#if EV_USE_EPOLL
		976	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		977	#endif
		978	#if EV_USE_POLL
		979	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		980	#endif
		981	#if EV_USE_SELECT
		982	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		983	#endif
		984
		985	ev_init (&sigev, sigcb);
		986	ev_set_priority (&sigev, EV_MAXPRI);
		987	}
		988	}
		989
		990	static void noinline
		991	loop_destroy (EV_P)
		992	{
		993	int i;
		994
		995	#if EV_USE_INOTIFY
		996	if (fs_fd >= 0)
		997	close (fs_fd);
		998	#endif
		999
		1000	if (backend_fd >= 0)
		1001	close (backend_fd);
		1002
		1003	#if EV_USE_PORT
		1004	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1005	#endif
		1006	#if EV_USE_KQUEUE
		1007	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		1008	#endif
		1009	#if EV_USE_EPOLL
		1010	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1011	#endif
		1012	#if EV_USE_POLL
		1013	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1014	#endif
		1015	#if EV_USE_SELECT
		1016	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1017	#endif
		1018
		1019	for (i = NUMPRI; i--; )
		1020	{
		1021	array_free (pending, [i]);
		1022	#if EV_IDLE_ENABLE
		1023	array_free (idle, [i]);
		1024	#endif
		1025	}
		1026
		1027	/* have to use the microsoft-never-gets-it-right macro */
		1028	array_free (fdchange, EMPTY);
		1029	array_free (timer, EMPTY);
		1030	#if EV_PERIODIC_ENABLE
		1031	array_free (periodic, EMPTY);
		1032	#endif
		1033	array_free (prepare, EMPTY);
		1034	array_free (check, EMPTY);
		1035
		1036	backend = 0;
		1037	}
		1038
		1039	void inline_size infy_fork (EV_P);
		1040
		1041	void inline_size
		1042	loop_fork (EV_P)
		1043	{
		1044	#if EV_USE_PORT
		1045	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1046	#endif
		1047	#if EV_USE_KQUEUE
		1048	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1049	#endif
		1050	#if EV_USE_EPOLL
		1051	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1052	#endif
		1053	#if EV_USE_INOTIFY
		1054	infy_fork (EV_A);
		1055	#endif
		1056
		1057	if (ev_is_active (&sigev))
		1058	{
		1059	/* default loop */
		1060
		1061	ev_ref (EV_A);
		1062	ev_io_stop (EV_A_ &sigev);
		1063	close (sigpipe [0]);
		1064	close (sigpipe [1]);
		1065
		1066	while (pipe (sigpipe))
		1067	syserr ("(libev) error creating pipe");
		1068
		1069	siginit (EV_A);
		1070	}
		1071
		1072	postfork = 0;
		1073	}
		1074
		1075	#if EV_MULTIPLICITY
		1076	struct ev_loop *
		1077	ev_loop_new (unsigned int flags)
		1078	{
		1079	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1080
		1081	memset (loop, 0, sizeof (struct ev_loop));
		1082
		1083	loop_init (EV_A_ flags);
		1084
		1085	if (ev_backend (EV_A))
		1086	return loop;
		1087
		1088	return 0;
		1089	}
		1090
		1091	void
		1092	ev_loop_destroy (EV_P)
		1093	{
		1094	loop_destroy (EV_A);
		1095	ev_free (loop);
		1096	}
		1097
		1098	void
		1099	ev_loop_fork (EV_P)
		1100	{
		1101	postfork = 1;
		1102	}
		1103
		1104	#endif
		1105
		1106	#if EV_MULTIPLICITY
		1107	struct ev_loop *
		1108	ev_default_loop_init (unsigned int flags)
		1109	#else
		1110	int
		1111	ev_default_loop (unsigned int flags)
		1112	#endif
		1113	{
		1114	if (sigpipe [0] == sigpipe [1])
		1115	if (pipe (sigpipe))
		1116	return 0;
		1117
		1118	if (!ev_default_loop_ptr)
		1119	{
		1120	#if EV_MULTIPLICITY
		1121	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1122	#else
		1123	ev_default_loop_ptr = 1;
		1124	#endif
		1125
		1126	loop_init (EV_A_ flags);
		1127
		1128	if (ev_backend (EV_A))
		1129	{
		1130	siginit (EV_A);
		1131
		1132	#ifndef _WIN32
		1133	ev_signal_init (&childev, childcb, SIGCHLD);
		1134	ev_set_priority (&childev, EV_MAXPRI);
		1135	ev_signal_start (EV_A_ &childev);
		1136	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1137	#endif
		1138	}
		1139	else
		1140	ev_default_loop_ptr = 0;
		1141	}
		1142
		1143	return ev_default_loop_ptr;
		1144	}
		1145
		1146	void
		1147	ev_default_destroy (void)
		1148	{
		1149	#if EV_MULTIPLICITY
		1150	struct ev_loop *loop = ev_default_loop_ptr;
		1151	#endif
		1152
		1153	#ifndef _WIN32
		1154	ev_ref (EV_A); /* child watcher */
		1155	ev_signal_stop (EV_A_ &childev);
		1156	#endif
		1157
		1158	ev_ref (EV_A); /* signal watcher */
		1159	ev_io_stop (EV_A_ &sigev);
		1160
		1161	close (sigpipe [0]); sigpipe [0] = 0;
		1162	close (sigpipe [1]); sigpipe [1] = 0;
		1163
		1164	loop_destroy (EV_A);
		1165	}
		1166
		1167	void
		1168	ev_default_fork (void)
		1169	{
		1170	#if EV_MULTIPLICITY
		1171	struct ev_loop *loop = ev_default_loop_ptr;
		1172	#endif
		1173
		1174	if (backend)
		1175	postfork = 1;
		1176	}
288		1177
289	/*****************************************************************************/	1178	/*****************************************************************************/
290		1179
291	#if HAVE_EPOLL	1180	void
292	# include "ev_epoll.c"	1181	ev_invoke (EV_P_ void *w, int revents)
293	#endif
294	#if HAVE_SELECT
295	# include "ev_select.c"
296	#endif
297
298	int ev_init (int flags)
299	{	1182	{
300	#if HAVE_MONOTONIC	1183	EV_CB_INVOKE ((W)w, revents);
301	{
302	struct timespec ts;
303	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
304	have_monotonic = 1;
305	}
306	#endif
307
308	ev_now = ev_time ();
309	now = get_clock ();
310	diff = ev_now - now;
311
312	if (pipe (sigpipe))
313	return 0;
314
315	ev_method = EVMETHOD_NONE;
316	#if HAVE_EPOLL
317	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
318	#endif
319	#if HAVE_SELECT
320	if (ev_method == EVMETHOD_NONE) select_init (flags);
321	#endif
322
323	if (ev_method)
324	{
325	evw_init (&sigev, sigcb);
326	siginit ();
327	}
328
329	return ev_method;
330	}	1184	}
331		1185
332	/*****************************************************************************/	1186	void inline_speed
333		1187	call_pending (EV_P)
334	void ev_prefork (void)
335	{	1188	{
336	/* nop */
337	}
338
339	void ev_postfork_parent (void)
340	{
341	/* nop */
342	}
343
344	void ev_postfork_child (void)
345	{
346	#if HAVE_EPOLL
347	if (ev_method == EVMETHOD_EPOLL)
348	epoll_postfork_child ();
349	#endif
350
351	evio_stop (&sigev);
352	close (sigpipe [0]);
353	close (sigpipe [1]);
354	pipe (sigpipe);
355	siginit ();
356	}
357
358	/*****************************************************************************/
359
360	static void
361	fd_reify (void)
362	{
363	int i;	1189	int pri;
364		1190
365	for (i = 0; i < fdchangecnt; ++i)	1191	for (pri = NUMPRI; pri--; )
		1192	while (pendingcnt [pri])
366	{	1193	{
367	int fd = fdchanges [i];	1194	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
368	ANFD *anfd = anfds + fd;
369	struct ev_io *w;
370		1195
371	int wev = 0;	1196	if (expect_true (p->w))
372
373	for (w = anfd->head; w; w = w->next)
374	wev |= w->events;
375
376	if (anfd->wev != wev)
377	{	1197	{
378	method_modify (fd, anfd->wev, wev);	1198	/*assert (("non-pending watcher on pending list", p->w->pending));*/
379	anfd->wev = wev;
380	}
381	}
382		1199
383	fdchangecnt = 0;
384	}
385
386	static void
387	call_pending ()
388	{
389	int i;
390
391	for (i = 0; i < pendingcnt; ++i)
392	{
393	ANPENDING *p = pendings + i;
394
395	if (p->w)
396	{
397	p->w->pending = 0;	1200	p->w->pending = 0;
398	p->w->cb (p->w, p->events);	1201	EV_CB_INVOKE (p->w, p->events);
399	}	1202	}
400	}	1203	}
401
402	pendingcnt = 0;
403	}	1204	}
404		1205
405	static void	1206	void inline_size
406	timers_reify ()	1207	timers_reify (EV_P)
407	{	1208	{
408	while (timercnt && timers [0]->at <= now)	1209	while (timercnt && ((WT)timers [0])->at <= mn_now)
409	{	1210	{
410	struct ev_timer *w = timers [0];	1211	ev_timer *w = timers [0];
		1212
		1213	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
411		1214
412	/* first reschedule or stop timer */	1215	/* first reschedule or stop timer */
413	if (w->repeat)	1216	if (w->repeat)
414	{	1217	{
		1218	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1219
415	w->at = now + w->repeat;	1220	((WT)w)->at += w->repeat;
416	assert (("timer timeout in the past, negative repeat?", w->at > now));	1221	if (((WT)w)->at < mn_now)
		1222	((WT)w)->at = mn_now;
		1223
417	downheap ((WT *)timers, timercnt, 0);	1224	downheap ((WT *)timers, timercnt, 0);
418	}	1225	}
419	else	1226	else
420	evtimer_stop (w); /* nonrepeating: stop timer */	1227	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
421		1228
422	event ((W)w, EV_TIMEOUT);	1229	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
423	}	1230	}
424	}	1231	}
425		1232
426	static void	1233	#if EV_PERIODIC_ENABLE
		1234	void inline_size
427	periodics_reify ()	1235	periodics_reify (EV_P)
428	{	1236	{
429	while (periodiccnt && periodics [0]->at <= ev_now)	1237	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
430	{	1238	{
431	struct ev_periodic *w = periodics [0];	1239	ev_periodic *w = periodics [0];
		1240
		1241	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
432		1242
433	/* first reschedule or stop timer */	1243	/* first reschedule or stop timer */
434	if (w->interval)	1244	if (w->reschedule_cb)
435	{	1245	{
		1246	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1247	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1248	downheap ((WT *)periodics, periodiccnt, 0);
		1249	}
		1250	else if (w->interval)
		1251	{
436	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1252	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1253	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
437	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1254	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
438	downheap ((WT *)periodics, periodiccnt, 0);	1255	downheap ((WT *)periodics, periodiccnt, 0);
439	}	1256	}
440	else	1257	else
441	evperiodic_stop (w); /* nonrepeating: stop timer */	1258	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
442		1259
443	event ((W)w, EV_TIMEOUT);	1260	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
444	}	1261	}
445	}	1262	}
446		1263
447	static void	1264	static void noinline
448	periodics_reschedule (ev_tstamp diff)	1265	periodics_reschedule (EV_P)
449	{	1266	{
450	int i;	1267	int i;
451		1268
452	/* adjust periodics after time jump */	1269	/* adjust periodics after time jump */
453	for (i = 0; i < periodiccnt; ++i)	1270	for (i = 0; i < periodiccnt; ++i)
454	{	1271	{
455	struct ev_periodic *w = periodics [i];	1272	ev_periodic *w = periodics [i];
456		1273
		1274	if (w->reschedule_cb)
		1275	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
457	if (w->interval)	1276	else if (w->interval)
		1277	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1278	}
		1279
		1280	/* now rebuild the heap */
		1281	for (i = periodiccnt >> 1; i--; )
		1282	downheap ((WT *)periodics, periodiccnt, i);
		1283	}
		1284	#endif
		1285
		1286	#if EV_IDLE_ENABLE
		1287	void inline_size
		1288	idle_reify (EV_P)
		1289	{
		1290	if (expect_false (idleall))
		1291	{
		1292	int pri;
		1293
		1294	for (pri = NUMPRI; pri--; )
458	{	1295	{
459	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1296	if (pendingcnt [pri])
		1297	break;
460		1298
461	if (fabs (diff) >= 1e-4)	1299	if (idlecnt [pri])
462	{	1300	{
463	evperiodic_stop (w);	1301	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
464	evperiodic_start (w);	1302	break;
465
466	i = 0; /* restart loop, inefficient, but time jumps should be rare */
467	}	1303	}
468	}	1304	}
469	}	1305	}
470	}	1306	}
		1307	#endif
471		1308
472	static void	1309	int inline_size
		1310	time_update_monotonic (EV_P)
		1311	{
		1312	mn_now = get_clock ();
		1313
		1314	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1315	{
		1316	ev_rt_now = rtmn_diff + mn_now;
		1317	return 0;
		1318	}
		1319	else
		1320	{
		1321	now_floor = mn_now;
		1322	ev_rt_now = ev_time ();
		1323	return 1;
		1324	}
		1325	}
		1326
		1327	void inline_size
473	time_update ()	1328	time_update (EV_P)
474	{	1329	{
475	int i;	1330	int i;
476		1331
477	ev_now = ev_time ();	1332	#if EV_USE_MONOTONIC
478
479	if (have_monotonic)	1333	if (expect_true (have_monotonic))
480	{	1334	{
481	ev_tstamp odiff = diff;	1335	if (time_update_monotonic (EV_A))
482
483	for (i = 4; --i; ) /* loop a few times, before making important decisions */
484	{	1336	{
485	now = get_clock ();	1337	ev_tstamp odiff = rtmn_diff;
		1338
		1339	/* loop a few times, before making important decisions.
		1340	* on the choice of "4": one iteration isn't enough,
		1341	* in case we get preempted during the calls to
		1342	* ev_time and get_clock. a second call is almost guaranteed
		1343	* to succeed in that case, though. and looping a few more times
		1344	* doesn't hurt either as we only do this on time-jumps or
		1345	* in the unlikely event of having been preempted here.
		1346	*/
		1347	for (i = 4; --i; )
		1348	{
486	diff = ev_now - now;	1349	rtmn_diff = ev_rt_now - mn_now;
487		1350
488	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1351	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
489	return; /* all is well */	1352	return; /* all is well */
490		1353
491	ev_now = ev_time ();	1354	ev_rt_now = ev_time ();
		1355	mn_now = get_clock ();
		1356	now_floor = mn_now;
		1357	}
		1358
		1359	# if EV_PERIODIC_ENABLE
		1360	periodics_reschedule (EV_A);
		1361	# endif
		1362	/* no timer adjustment, as the monotonic clock doesn't jump */
		1363	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
492	}	1364	}
493
494	periodics_reschedule (diff - odiff);
495	/* no timer adjustment, as the monotonic clock doesn't jump */
496	}	1365	}
497	else	1366	else
		1367	#endif
498	{	1368	{
499	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1369	ev_rt_now = ev_time ();
		1370
		1371	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
500	{	1372	{
		1373	#if EV_PERIODIC_ENABLE
501	periodics_reschedule (ev_now - now);	1374	periodics_reschedule (EV_A);
502		1375	#endif
503	/* adjust timers. this is easy, as the offset is the same for all */	1376	/* adjust timers. this is easy, as the offset is the same for all of them */
504	for (i = 0; i < timercnt; ++i)	1377	for (i = 0; i < timercnt; ++i)
505	timers [i]->at += diff;	1378	((WT)timers [i])->at += ev_rt_now - mn_now;
506	}	1379	}
507		1380
508	now = ev_now;	1381	mn_now = ev_rt_now;
509	}
510	}
511
512	int ev_loop_done;
513
514	void ev_loop (int flags)
515	{
516	double block;
517	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
518
519	if (checkcnt)
520	{	1382	}
521	queue_events ((W *)checks, checkcnt, EV_CHECK);	1383	}
522	call_pending ();	1384
523	}	1385	void
		1386	ev_ref (EV_P)
		1387	{
		1388	++activecnt;
		1389	}
		1390
		1391	void
		1392	ev_unref (EV_P)
		1393	{
		1394	--activecnt;
		1395	}
		1396
		1397	static int loop_done;
		1398
		1399	void
		1400	ev_loop (EV_P_ int flags)
		1401	{
		1402	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1403	? EVUNLOOP_ONE
		1404	: EVUNLOOP_CANCEL;
		1405
		1406	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
524		1407
525	do	1408	do
526	{	1409	{
		1410	#ifndef _WIN32
		1411	if (expect_false (curpid)) /* penalise the forking check even more */
		1412	if (expect_false (getpid () != curpid))
		1413	{
		1414	curpid = getpid ();
		1415	postfork = 1;
		1416	}
		1417	#endif
		1418
		1419	#if EV_FORK_ENABLE
		1420	/* we might have forked, so queue fork handlers */
		1421	if (expect_false (postfork))
		1422	if (forkcnt)
		1423	{
		1424	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1425	call_pending (EV_A);
		1426	}
		1427	#endif
		1428
		1429	/* queue prepare watchers (and execute them) */
		1430	if (expect_false (preparecnt))
		1431	{
		1432	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1433	call_pending (EV_A);
		1434	}
		1435
		1436	if (expect_false (!activecnt))
		1437	break;
		1438
		1439	/* we might have forked, so reify kernel state if necessary */
		1440	if (expect_false (postfork))
		1441	loop_fork (EV_A);
		1442
527	/* update fd-related kernel structures */	1443	/* update fd-related kernel structures */
528	fd_reify ();	1444	fd_reify (EV_A);
529		1445
530	/* calculate blocking time */	1446	/* calculate blocking time */
		1447	{
		1448	ev_tstamp block;
531		1449
532	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1450	if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))
533	ev_now = ev_time ();	1451	block = 0.; /* do not block at all */
534
535	if (flags & EVLOOP_NONBLOCK || idlecnt)
536	block = 0.;
537	else	1452	else
538	{	1453	{
		1454	/* update time to cancel out callback processing overhead */
		1455	#if EV_USE_MONOTONIC
		1456	if (expect_true (have_monotonic))
		1457	time_update_monotonic (EV_A);
		1458	else
		1459	#endif
		1460	{
		1461	ev_rt_now = ev_time ();
		1462	mn_now = ev_rt_now;
		1463	}
		1464
539	block = MAX_BLOCKTIME;	1465	block = MAX_BLOCKTIME;
540		1466
541	if (timercnt)	1467	if (timercnt)
542	{	1468	{
543	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1469	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
544	if (block > to) block = to;	1470	if (block > to) block = to;
545	}	1471	}
546		1472
		1473	#if EV_PERIODIC_ENABLE
547	if (periodiccnt)	1474	if (periodiccnt)
548	{	1475	{
549	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1476	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
550	if (block > to) block = to;	1477	if (block > to) block = to;
551	}	1478	}
		1479	#endif
552		1480
553	if (block < 0.) block = 0.;	1481	if (expect_false (block < 0.)) block = 0.;
554	}	1482	}
555		1483
556	method_poll (block);	1484	++loop_count;
		1485	backend_poll (EV_A_ block);
		1486	}
557		1487
558	/* update ev_now, do magic */	1488	/* update ev_rt_now, do magic */
559	time_update ();	1489	time_update (EV_A);
560		1490
561	/* queue pending timers and reschedule them */	1491	/* queue pending timers and reschedule them */
		1492	timers_reify (EV_A); /* relative timers called last */
		1493	#if EV_PERIODIC_ENABLE
562	periodics_reify (); /* absolute timers first */	1494	periodics_reify (EV_A); /* absolute timers called first */
563	timers_reify (); /* relative timers second */	1495	#endif
564		1496
		1497	#if EV_IDLE_ENABLE
565	/* queue idle watchers unless io or timers are pending */	1498	/* queue idle watchers unless other events are pending */
566	if (!pendingcnt)	1499	idle_reify (EV_A);
567	queue_events ((W *)idles, idlecnt, EV_IDLE);	1500	#endif
568		1501
569	/* queue check and possibly idle watchers */	1502	/* queue check watchers, to be executed first */
		1503	if (expect_false (checkcnt))
570	queue_events ((W *)checks, checkcnt, EV_CHECK);	1504	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
571		1505
572	call_pending ();	1506	call_pending (EV_A);
573	}
574	while (!ev_loop_done);
575		1507
576	if (ev_loop_done != 2)	1508	}
		1509	while (expect_true (activecnt && !loop_done));
		1510
		1511	if (loop_done == EVUNLOOP_ONE)
		1512	loop_done = EVUNLOOP_CANCEL;
		1513	}
		1514
		1515	void
		1516	ev_unloop (EV_P_ int how)
		1517	{
577	ev_loop_done = 0;	1518	loop_done = how;
578	}	1519	}
579		1520
580	/*****************************************************************************/	1521	/*****************************************************************************/
581		1522
582	static void	1523	void inline_size
583	wlist_add (WL *head, WL elem)	1524	wlist_add (WL *head, WL elem)
584	{	1525	{
585	elem->next = *head;	1526	elem->next = *head;
586	*head = elem;	1527	*head = elem;
587	}	1528	}
588		1529
589	static void	1530	void inline_size
590	wlist_del (WL *head, WL elem)	1531	wlist_del (WL *head, WL elem)
591	{	1532	{
592	while (*head)	1533	while (*head)
593	{	1534	{
594	if (*head == elem)	1535	if (*head == elem)
…		…
599		1540
600	head = &(*head)->next;	1541	head = &(*head)->next;
601	}	1542	}
602	}	1543	}
603		1544
604	static void	1545	void inline_speed
		1546	clear_pending (EV_P_ W w)
		1547	{
		1548	if (w->pending)
		1549	{
		1550	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1551	w->pending = 0;
		1552	}
		1553	}
		1554
		1555	int
		1556	ev_clear_pending (EV_P_ void *w)
		1557	{
		1558	W w_ = (W)w;
		1559	int pending = w_->pending;
		1560
		1561	if (expect_true (pending))
		1562	{
		1563	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1564	w_->pending = 0;
		1565	p->w = 0;
		1566	return p->events;
		1567	}
		1568	else
		1569	return 0;
		1570	}
		1571
		1572	void inline_size
		1573	pri_adjust (EV_P_ W w)
		1574	{
		1575	int pri = w->priority;
		1576	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1577	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1578	w->priority = pri;
		1579	}
		1580
		1581	void inline_speed
605	ev_start (W w, int active)	1582	ev_start (EV_P_ W w, int active)
606	{	1583	{
607	w->pending = 0;	1584	pri_adjust (EV_A_ w);
608	w->active = active;	1585	w->active = active;
		1586	ev_ref (EV_A);
609	}	1587	}
610		1588
611	static void	1589	void inline_size
612	ev_stop (W w)	1590	ev_stop (EV_P_ W w)
613	{	1591	{
614	if (w->pending)	1592	ev_unref (EV_A);
615	pendings [w->pending - 1].w = 0;
616
617	w->active = 0;	1593	w->active = 0;
618	}	1594	}
619		1595
620	/*****************************************************************************/	1596	/*****************************************************************************/
621		1597
622	void	1598	void noinline
623	evio_start (struct ev_io *w)	1599	ev_io_start (EV_P_ ev_io *w)
624	{	1600	{
625	if (ev_is_active (w))
626	return;
627
628	int fd = w->fd;	1601	int fd = w->fd;
629		1602
		1603	if (expect_false (ev_is_active (w)))
		1604	return;
		1605
		1606	assert (("ev_io_start called with negative fd", fd >= 0));
		1607
630	ev_start ((W)w, 1);	1608	ev_start (EV_A_ (W)w, 1);
631	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1609	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
632	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1610	wlist_add ((WL *)&anfds[fd].head, (WL)w);
633		1611
634	++fdchangecnt;	1612	fd_change (EV_A_ fd);
635	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
636	fdchanges [fdchangecnt - 1] = fd;
637	}	1613	}
638		1614
639	void	1615	void noinline
640	evio_stop (struct ev_io *w)	1616	ev_io_stop (EV_P_ ev_io *w)
641	{	1617	{
		1618	clear_pending (EV_A_ (W)w);
642	if (!ev_is_active (w))	1619	if (expect_false (!ev_is_active (w)))
643	return;	1620	return;
		1621
		1622	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
644		1623
645	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1624	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
646	ev_stop ((W)w);	1625	ev_stop (EV_A_ (W)w);
647		1626
648	++fdchangecnt;	1627	fd_change (EV_A_ w->fd);
649	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
650	fdchanges [fdchangecnt - 1] = w->fd;
651	}	1628	}
652		1629
653		1630	void noinline
654	void
655	evtimer_start (struct ev_timer *w)	1631	ev_timer_start (EV_P_ ev_timer *w)
656	{	1632	{
657	if (ev_is_active (w))	1633	if (expect_false (ev_is_active (w)))
658	return;	1634	return;
659		1635
660	w->at += now;	1636	((WT)w)->at += mn_now;
661		1637
662	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1638	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
663		1639
664	ev_start ((W)w, ++timercnt);	1640	ev_start (EV_A_ (W)w, ++timercnt);
665	array_needsize (timers, timermax, timercnt, );	1641	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
666	timers [timercnt - 1] = w;	1642	timers [timercnt - 1] = w;
667	upheap ((WT *)timers, timercnt - 1);	1643	upheap ((WT *)timers, timercnt - 1);
668	}
669		1644
670	void	1645	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1646	}
		1647
		1648	void noinline
671	evtimer_stop (struct ev_timer *w)	1649	ev_timer_stop (EV_P_ ev_timer *w)
672	{	1650	{
		1651	clear_pending (EV_A_ (W)w);
673	if (!ev_is_active (w))	1652	if (expect_false (!ev_is_active (w)))
674	return;	1653	return;
675		1654
676	if (w->active < timercnt--)	1655	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1656
		1657	{
		1658	int active = ((W)w)->active;
		1659
		1660	if (expect_true (--active < --timercnt))
677	{	1661	{
678	timers [w->active - 1] = timers [timercnt];	1662	timers [active] = timers [timercnt];
679	downheap ((WT *)timers, timercnt, w->active - 1);	1663	adjustheap ((WT *)timers, timercnt, active);
680	}	1664	}
		1665	}
681		1666
682	w->at = w->repeat;	1667	((WT)w)->at -= mn_now;
683		1668
684	ev_stop ((W)w);	1669	ev_stop (EV_A_ (W)w);
685	}	1670	}
686		1671
687	void	1672	void noinline
688	evtimer_again (struct ev_timer *w)	1673	ev_timer_again (EV_P_ ev_timer *w)
689	{	1674	{
690	if (ev_is_active (w))	1675	if (ev_is_active (w))
691	{	1676	{
692	if (w->repeat)	1677	if (w->repeat)
693	{	1678	{
694	w->at = now + w->repeat;	1679	((WT)w)->at = mn_now + w->repeat;
695	downheap ((WT *)timers, timercnt, w->active - 1);	1680	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
696	}	1681	}
697	else	1682	else
698	evtimer_stop (w);	1683	ev_timer_stop (EV_A_ w);
699	}	1684	}
700	else if (w->repeat)	1685	else if (w->repeat)
		1686	{
		1687	w->at = w->repeat;
701	evtimer_start (w);	1688	ev_timer_start (EV_A_ w);
		1689	}
702	}	1690	}
703		1691
704	void	1692	#if EV_PERIODIC_ENABLE
		1693	void noinline
705	evperiodic_start (struct ev_periodic *w)	1694	ev_periodic_start (EV_P_ ev_periodic *w)
706	{	1695	{
707	if (ev_is_active (w))	1696	if (expect_false (ev_is_active (w)))
708	return;	1697	return;
709		1698
710	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1699	if (w->reschedule_cb)
711		1700	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1701	else if (w->interval)
		1702	{
		1703	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
712	/* this formula differs from the one in periodic_reify because we do not always round up */	1704	/* this formula differs from the one in periodic_reify because we do not always round up */
713	if (w->interval)
714	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1705	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1706	}
		1707	else
		1708	((WT)w)->at = w->offset;
715		1709
716	ev_start ((W)w, ++periodiccnt);	1710	ev_start (EV_A_ (W)w, ++periodiccnt);
717	array_needsize (periodics, periodicmax, periodiccnt, );	1711	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
718	periodics [periodiccnt - 1] = w;	1712	periodics [periodiccnt - 1] = w;
719	upheap ((WT *)periodics, periodiccnt - 1);	1713	upheap ((WT *)periodics, periodiccnt - 1);
720	}
721		1714
722	void	1715	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1716	}
		1717
		1718	void noinline
723	evperiodic_stop (struct ev_periodic *w)	1719	ev_periodic_stop (EV_P_ ev_periodic *w)
724	{	1720	{
		1721	clear_pending (EV_A_ (W)w);
725	if (!ev_is_active (w))	1722	if (expect_false (!ev_is_active (w)))
726	return;	1723	return;
727		1724
728	if (w->active < periodiccnt--)	1725	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1726
		1727	{
		1728	int active = ((W)w)->active;
		1729
		1730	if (expect_true (--active < --periodiccnt))
729	{	1731	{
730	periodics [w->active - 1] = periodics [periodiccnt];	1732	periodics [active] = periodics [periodiccnt];
731	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1733	adjustheap ((WT *)periodics, periodiccnt, active);
732	}	1734	}
		1735	}
733		1736
734	ev_stop ((W)w);	1737	ev_stop (EV_A_ (W)w);
735	}	1738	}
736		1739
737	void	1740	void noinline
		1741	ev_periodic_again (EV_P_ ev_periodic *w)
		1742	{
		1743	/* TODO: use adjustheap and recalculation */
		1744	ev_periodic_stop (EV_A_ w);
		1745	ev_periodic_start (EV_A_ w);
		1746	}
		1747	#endif
		1748
		1749	#ifndef SA_RESTART
		1750	# define SA_RESTART 0
		1751	#endif
		1752
		1753	void noinline
738	evsignal_start (struct ev_signal *w)	1754	ev_signal_start (EV_P_ ev_signal *w)
739	{	1755	{
		1756	#if EV_MULTIPLICITY
		1757	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1758	#endif
740	if (ev_is_active (w))	1759	if (expect_false (ev_is_active (w)))
741	return;	1760	return;
742		1761
		1762	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1763
743	ev_start ((W)w, 1);	1764	ev_start (EV_A_ (W)w, 1);
744	array_needsize (signals, signalmax, w->signum, signals_init);	1765	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
745	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1766	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
746		1767
747	if (!w->next)	1768	if (!((WL)w)->next)
748	{	1769	{
		1770	#if _WIN32
		1771	signal (w->signum, sighandler);
		1772	#else
749	struct sigaction sa;	1773	struct sigaction sa;
750	sa.sa_handler = sighandler;	1774	sa.sa_handler = sighandler;
751	sigfillset (&sa.sa_mask);	1775	sigfillset (&sa.sa_mask);
752	sa.sa_flags = 0;	1776	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
753	sigaction (w->signum, &sa, 0);	1777	sigaction (w->signum, &sa, 0);
		1778	#endif
754	}	1779	}
755	}	1780	}
756		1781
757	void	1782	void noinline
758	evsignal_stop (struct ev_signal *w)	1783	ev_signal_stop (EV_P_ ev_signal *w)
759	{	1784	{
		1785	clear_pending (EV_A_ (W)w);
760	if (!ev_is_active (w))	1786	if (expect_false (!ev_is_active (w)))
761	return;	1787	return;
762		1788
763	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1789	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
764	ev_stop ((W)w);	1790	ev_stop (EV_A_ (W)w);
765		1791
766	if (!signals [w->signum - 1].head)	1792	if (!signals [w->signum - 1].head)
767	signal (w->signum, SIG_DFL);	1793	signal (w->signum, SIG_DFL);
768	}	1794	}
769		1795
770	void evidle_start (struct ev_idle *w)	1796	void
		1797	ev_child_start (EV_P_ ev_child *w)
771	{	1798	{
		1799	#if EV_MULTIPLICITY
		1800	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1801	#endif
772	if (ev_is_active (w))	1802	if (expect_false (ev_is_active (w)))
773	return;	1803	return;
774		1804
775	ev_start ((W)w, ++idlecnt);	1805	ev_start (EV_A_ (W)w, 1);
776	array_needsize (idles, idlemax, idlecnt, );	1806	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
777	idles [idlecnt - 1] = w;
778	}	1807	}
779		1808
780	void evidle_stop (struct ev_idle *w)	1809	void
		1810	ev_child_stop (EV_P_ ev_child *w)
781	{	1811	{
782	idles [w->active - 1] = idles [--idlecnt];	1812	clear_pending (EV_A_ (W)w);
		1813	if (expect_false (!ev_is_active (w)))
		1814	return;
		1815
		1816	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
783	ev_stop ((W)w);	1817	ev_stop (EV_A_ (W)w);
784	}	1818	}
785		1819
		1820	#if EV_STAT_ENABLE
		1821
		1822	# ifdef _WIN32
		1823	# undef lstat
		1824	# define lstat(a,b) _stati64 (a,b)
		1825	# endif
		1826
		1827	#define DEF_STAT_INTERVAL 5.0074891
		1828	#define MIN_STAT_INTERVAL 0.1074891
		1829
		1830	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1831
		1832	#if EV_USE_INOTIFY
		1833	# define EV_INOTIFY_BUFSIZE 8192
		1834
		1835	static void noinline
		1836	infy_add (EV_P_ ev_stat *w)
		1837	{
		1838	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);
		1839
		1840	if (w->wd < 0)
		1841	{
		1842	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1843
		1844	/* monitor some parent directory for speedup hints */
		1845	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1846	{
		1847	char path [4096];
		1848	strcpy (path, w->path);
		1849
		1850	do
		1851	{
		1852	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1853	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1854
		1855	char *pend = strrchr (path, '/');
		1856
		1857	if (!pend)
		1858	break; /* whoops, no '/', complain to your admin */
		1859
		1860	*pend = 0;
		1861	w->wd = inotify_add_watch (fs_fd, path, mask);
		1862	}
		1863	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1864	}
		1865	}
		1866	else
		1867	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1868
		1869	if (w->wd >= 0)
		1870	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1871	}
		1872
		1873	static void noinline
		1874	infy_del (EV_P_ ev_stat *w)
		1875	{
		1876	int slot;
		1877	int wd = w->wd;
		1878
		1879	if (wd < 0)
		1880	return;
		1881
		1882	w->wd = -2;
		1883	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1884	wlist_del (&fs_hash [slot].head, (WL)w);
		1885
		1886	/* remove this watcher, if others are watching it, they will rearm */
		1887	inotify_rm_watch (fs_fd, wd);
		1888	}
		1889
		1890	static void noinline
		1891	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1892	{
		1893	if (slot < 0)
		1894	/* overflow, need to check for all hahs slots */
		1895	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1896	infy_wd (EV_A_ slot, wd, ev);
		1897	else
		1898	{
		1899	WL w_;
		1900
		1901	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1902	{
		1903	ev_stat *w = (ev_stat *)w_;
		1904	w_ = w_->next; /* lets us remove this watcher and all before it */
		1905
		1906	if (w->wd == wd || wd == -1)
		1907	{
		1908	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		1909	{
		1910	w->wd = -1;
		1911	infy_add (EV_A_ w); /* re-add, no matter what */
		1912	}
		1913
		1914	stat_timer_cb (EV_A_ &w->timer, 0);
		1915	}
		1916	}
		1917	}
		1918	}
		1919
		1920	static void
		1921	infy_cb (EV_P_ ev_io *w, int revents)
		1922	{
		1923	char buf [EV_INOTIFY_BUFSIZE];
		1924	struct inotify_event *ev = (struct inotify_event *)buf;
		1925	int ofs;
		1926	int len = read (fs_fd, buf, sizeof (buf));
		1927
		1928	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1929	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1930	}
		1931
		1932	void inline_size
		1933	infy_init (EV_P)
		1934	{
		1935	if (fs_fd != -2)
		1936	return;
		1937
		1938	fs_fd = inotify_init ();
		1939
		1940	if (fs_fd >= 0)
		1941	{
		1942	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1943	ev_set_priority (&fs_w, EV_MAXPRI);
		1944	ev_io_start (EV_A_ &fs_w);
		1945	}
		1946	}
		1947
		1948	void inline_size
		1949	infy_fork (EV_P)
		1950	{
		1951	int slot;
		1952
		1953	if (fs_fd < 0)
		1954	return;
		1955
		1956	close (fs_fd);
		1957	fs_fd = inotify_init ();
		1958
		1959	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1960	{
		1961	WL w_ = fs_hash [slot].head;
		1962	fs_hash [slot].head = 0;
		1963
		1964	while (w_)
		1965	{
		1966	ev_stat *w = (ev_stat *)w_;
		1967	w_ = w_->next; /* lets us add this watcher */
		1968
		1969	w->wd = -1;
		1970
		1971	if (fs_fd >= 0)
		1972	infy_add (EV_A_ w); /* re-add, no matter what */
		1973	else
		1974	ev_timer_start (EV_A_ &w->timer);
		1975	}
		1976
		1977	}
		1978	}
		1979
		1980	#endif
		1981
		1982	void
		1983	ev_stat_stat (EV_P_ ev_stat *w)
		1984	{
		1985	if (lstat (w->path, &w->attr) < 0)
		1986	w->attr.st_nlink = 0;
		1987	else if (!w->attr.st_nlink)
		1988	w->attr.st_nlink = 1;
		1989	}
		1990
		1991	static void noinline
		1992	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1993	{
		1994	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		1995
		1996	/* we copy this here each the time so that */
		1997	/* prev has the old value when the callback gets invoked */
		1998	w->prev = w->attr;
		1999	ev_stat_stat (EV_A_ w);
		2000
		2001	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2002	if (
		2003	w->prev.st_dev != w->attr.st_dev
		2004	|| w->prev.st_ino != w->attr.st_ino
		2005	|| w->prev.st_mode != w->attr.st_mode
		2006	|| w->prev.st_nlink != w->attr.st_nlink
		2007	|| w->prev.st_uid != w->attr.st_uid
		2008	|| w->prev.st_gid != w->attr.st_gid
		2009	|| w->prev.st_rdev != w->attr.st_rdev
		2010	|| w->prev.st_size != w->attr.st_size
		2011	|| w->prev.st_atime != w->attr.st_atime
		2012	|| w->prev.st_mtime != w->attr.st_mtime
		2013	|| w->prev.st_ctime != w->attr.st_ctime
		2014	) {
		2015	#if EV_USE_INOTIFY
		2016	infy_del (EV_A_ w);
		2017	infy_add (EV_A_ w);
		2018	ev_stat_stat (EV_A_ w); /* avoid race... */
		2019	#endif
		2020
		2021	ev_feed_event (EV_A_ w, EV_STAT);
		2022	}
		2023	}
		2024
		2025	void
		2026	ev_stat_start (EV_P_ ev_stat *w)
		2027	{
		2028	if (expect_false (ev_is_active (w)))
		2029	return;
		2030
		2031	/* since we use memcmp, we need to clear any padding data etc. */
		2032	memset (&w->prev, 0, sizeof (ev_statdata));
		2033	memset (&w->attr, 0, sizeof (ev_statdata));
		2034
		2035	ev_stat_stat (EV_A_ w);
		2036
		2037	if (w->interval < MIN_STAT_INTERVAL)
		2038	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2039
		2040	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2041	ev_set_priority (&w->timer, ev_priority (w));
		2042
		2043	#if EV_USE_INOTIFY
		2044	infy_init (EV_A);
		2045
		2046	if (fs_fd >= 0)
		2047	infy_add (EV_A_ w);
		2048	else
		2049	#endif
		2050	ev_timer_start (EV_A_ &w->timer);
		2051
		2052	ev_start (EV_A_ (W)w, 1);
		2053	}
		2054
		2055	void
		2056	ev_stat_stop (EV_P_ ev_stat *w)
		2057	{
		2058	clear_pending (EV_A_ (W)w);
		2059	if (expect_false (!ev_is_active (w)))
		2060	return;
		2061
		2062	#if EV_USE_INOTIFY
		2063	infy_del (EV_A_ w);
		2064	#endif
		2065	ev_timer_stop (EV_A_ &w->timer);
		2066
		2067	ev_stop (EV_A_ (W)w);
		2068	}
		2069	#endif
		2070
		2071	#if EV_IDLE_ENABLE
		2072	void
		2073	ev_idle_start (EV_P_ ev_idle *w)
		2074	{
		2075	if (expect_false (ev_is_active (w)))
		2076	return;
		2077
		2078	pri_adjust (EV_A_ (W)w);
		2079
		2080	{
		2081	int active = ++idlecnt [ABSPRI (w)];
		2082
		2083	++idleall;
		2084	ev_start (EV_A_ (W)w, active);
		2085
		2086	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2087	idles [ABSPRI (w)][active - 1] = w;
		2088	}
		2089	}
		2090
		2091	void
		2092	ev_idle_stop (EV_P_ ev_idle *w)
		2093	{
		2094	clear_pending (EV_A_ (W)w);
		2095	if (expect_false (!ev_is_active (w)))
		2096	return;
		2097
		2098	{
		2099	int active = ((W)w)->active;
		2100
		2101	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2102	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2103
		2104	ev_stop (EV_A_ (W)w);
		2105	--idleall;
		2106	}
		2107	}
		2108	#endif
		2109
		2110	void
		2111	ev_prepare_start (EV_P_ ev_prepare *w)
		2112	{
		2113	if (expect_false (ev_is_active (w)))
		2114	return;
		2115
		2116	ev_start (EV_A_ (W)w, ++preparecnt);
		2117	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2118	prepares [preparecnt - 1] = w;
		2119	}
		2120
		2121	void
		2122	ev_prepare_stop (EV_P_ ev_prepare *w)
		2123	{
		2124	clear_pending (EV_A_ (W)w);
		2125	if (expect_false (!ev_is_active (w)))
		2126	return;
		2127
		2128	{
		2129	int active = ((W)w)->active;
		2130	prepares [active - 1] = prepares [--preparecnt];
		2131	((W)prepares [active - 1])->active = active;
		2132	}
		2133
		2134	ev_stop (EV_A_ (W)w);
		2135	}
		2136
		2137	void
786	void evcheck_start (struct ev_check *w)	2138	ev_check_start (EV_P_ ev_check *w)
787	{	2139	{
788	if (ev_is_active (w))	2140	if (expect_false (ev_is_active (w)))
789	return;	2141	return;
790		2142
791	ev_start ((W)w, ++checkcnt);	2143	ev_start (EV_A_ (W)w, ++checkcnt);
792	array_needsize (checks, checkmax, checkcnt, );	2144	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
793	checks [checkcnt - 1] = w;	2145	checks [checkcnt - 1] = w;
794	}	2146	}
795		2147
		2148	void
796	void evcheck_stop (struct ev_check *w)	2149	ev_check_stop (EV_P_ ev_check *w)
797	{	2150	{
		2151	clear_pending (EV_A_ (W)w);
		2152	if (expect_false (!ev_is_active (w)))
		2153	return;
		2154
		2155	{
		2156	int active = ((W)w)->active;
798	checks [w->active - 1] = checks [--checkcnt];	2157	checks [active - 1] = checks [--checkcnt];
		2158	((W)checks [active - 1])->active = active;
		2159	}
		2160
799	ev_stop ((W)w);	2161	ev_stop (EV_A_ (W)w);
800	}	2162	}
		2163
		2164	#if EV_EMBED_ENABLE
		2165	void noinline
		2166	ev_embed_sweep (EV_P_ ev_embed *w)
		2167	{
		2168	ev_loop (w->loop, EVLOOP_NONBLOCK);
		2169	}
		2170
		2171	static void
		2172	embed_cb (EV_P_ ev_io *io, int revents)
		2173	{
		2174	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2175
		2176	if (ev_cb (w))
		2177	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2178	else
		2179	ev_embed_sweep (loop, w);
		2180	}
		2181
		2182	void
		2183	ev_embed_start (EV_P_ ev_embed *w)
		2184	{
		2185	if (expect_false (ev_is_active (w)))
		2186	return;
		2187
		2188	{
		2189	struct ev_loop *loop = w->loop;
		2190	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2191	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		2192	}
		2193
		2194	ev_set_priority (&w->io, ev_priority (w));
		2195	ev_io_start (EV_A_ &w->io);
		2196
		2197	ev_start (EV_A_ (W)w, 1);
		2198	}
		2199
		2200	void
		2201	ev_embed_stop (EV_P_ ev_embed *w)
		2202	{
		2203	clear_pending (EV_A_ (W)w);
		2204	if (expect_false (!ev_is_active (w)))
		2205	return;
		2206
		2207	ev_io_stop (EV_A_ &w->io);
		2208
		2209	ev_stop (EV_A_ (W)w);
		2210	}
		2211	#endif
		2212
		2213	#if EV_FORK_ENABLE
		2214	void
		2215	ev_fork_start (EV_P_ ev_fork *w)
		2216	{
		2217	if (expect_false (ev_is_active (w)))
		2218	return;
		2219
		2220	ev_start (EV_A_ (W)w, ++forkcnt);
		2221	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2222	forks [forkcnt - 1] = w;
		2223	}
		2224
		2225	void
		2226	ev_fork_stop (EV_P_ ev_fork *w)
		2227	{
		2228	clear_pending (EV_A_ (W)w);
		2229	if (expect_false (!ev_is_active (w)))
		2230	return;
		2231
		2232	{
		2233	int active = ((W)w)->active;
		2234	forks [active - 1] = forks [--forkcnt];
		2235	((W)forks [active - 1])->active = active;
		2236	}
		2237
		2238	ev_stop (EV_A_ (W)w);
		2239	}
		2240	#endif
801		2241
802	/*****************************************************************************/	2242	/*****************************************************************************/
803		2243
804	#if 0	2244	struct ev_once
805		2245	{
806	struct ev_io wio;	2246	ev_io io;
		2247	ev_timer to;
		2248	void (*cb)(int revents, void *arg);
		2249	void *arg;
		2250	};
807		2251
808	static void	2252	static void
809	sin_cb (struct ev_io *w, int revents)	2253	once_cb (EV_P_ struct ev_once *once, int revents)
810	{	2254	{
811	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	2255	void (*cb)(int revents, void *arg) = once->cb;
		2256	void *arg = once->arg;
		2257
		2258	ev_io_stop (EV_A_ &once->io);
		2259	ev_timer_stop (EV_A_ &once->to);
		2260	ev_free (once);
		2261
		2262	cb (revents, arg);
812	}	2263	}
813		2264
814	static void	2265	static void
815	ocb (struct ev_timer *w, int revents)	2266	once_cb_io (EV_P_ ev_io *w, int revents)
816	{	2267	{
817	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	2268	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
818	evtimer_stop (w);
819	evtimer_start (w);
820	}	2269	}
821		2270
822	static void	2271	static void
823	scb (struct ev_signal *w, int revents)	2272	once_cb_to (EV_P_ ev_timer *w, int revents)
824	{	2273	{
825	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	2274	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
826	evio_stop (&wio);
827	evio_start (&wio);
828	}	2275	}
829		2276
830	static void	2277	void
831	gcb (struct ev_signal *w, int revents)	2278	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
832	{	2279	{
833	fprintf (stderr, "generic %x\n", revents);	2280	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
834		2281
835	}	2282	if (expect_false (!once))
836
837	int main (void)
838	{
839	ev_init (0);
840
841	evio_init (&wio, sin_cb, 0, EV_READ);
842	evio_start (&wio);
843
844	struct ev_timer t[10000];
845
846	#if 0
847	int i;
848	for (i = 0; i < 10000; ++i)
849	{
850	struct ev_timer *w = t + i;
851	evw_init (w, ocb, i);
852	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
853	evtimer_start (w);
854	if (drand48 () < 0.5)
855	evtimer_stop (w);
856	}	2283	{
857	#endif	2284	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
858
859	struct ev_timer t1;
860	evtimer_init (&t1, ocb, 5, 10);
861	evtimer_start (&t1);
862
863	struct ev_signal sig;
864	evsignal_init (&sig, scb, SIGQUIT);
865	evsignal_start (&sig);
866
867	struct ev_check cw;
868	evcheck_init (&cw, gcb);
869	evcheck_start (&cw);
870
871	struct ev_idle iw;
872	evidle_init (&iw, gcb);
873	evidle_start (&iw);
874
875	ev_loop (0);
876
877	return 0;	2285	return;
878	}	2286	}
879		2287
880	#endif	2288	once->cb = cb;
		2289	once->arg = arg;
881		2290
		2291	ev_init (&once->io, once_cb_io);
		2292	if (fd >= 0)
		2293	{
		2294	ev_io_set (&once->io, fd, events);
		2295	ev_io_start (EV_A_ &once->io);
		2296	}
882		2297
		2298	ev_init (&once->to, once_cb_to);
		2299	if (timeout >= 0.)
		2300	{
		2301	ev_timer_set (&once->to, timeout, 0.);
		2302	ev_timer_start (EV_A_ &once->to);
		2303	}
		2304	}
883		2305
		2306	#ifdef __cplusplus
		2307	}
		2308	#endif
884		2309

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