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Comparing libev/ev.c (file contents):
Revision 1.18 by root, Wed Oct 31 16:29:52 2007 UTC vs.
Revision 1.168 by root, Sat Dec 8 14:12:07 2007 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
…		…
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
29		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
30	#include <math.h>	109	#include <math.h>
31	#include <stdlib.h>	110	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	111	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	112	#include <stddef.h>
36		113
37	#include <stdio.h>	114	#include <stdio.h>
38		115
39	#include <assert.h>	116	#include <assert.h>
40	#include <errno.h>	117	#include <errno.h>
41	#include <sys/time.h>	118	#include <sys/types.h>
42	#include <time.h>	119	#include <time.h>
43		120
44	#define HAVE_EPOLL 1	121	#include <signal.h>
45		122
46	#ifndef HAVE_MONOTONIC	123	#ifdef EV_H
47	# ifdef CLOCK_MONOTONIC	124	# include EV_H
48	# 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
49	# endif	138	# endif
50	#endif	139	#endif
51		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
52	#ifndef HAVE_SELECT	151	#ifndef EV_USE_SELECT
53	# 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
54	#endif	160	# endif
		161	#endif
55		162
56	#ifndef HAVE_EPOLL	163	#ifndef EV_USE_EPOLL
57	# 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
58	#endif	184	# endif
		185	#endif
59		186
60	#ifndef HAVE_REALTIME	187	#ifndef EV_INOTIFY_HASHSIZE
61	# 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
62	#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	/**/
63		220
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	221	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	222	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		223	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
66		224
67	#include "ev.h"	225	#if __GNUC__ >= 3
		226	# define expect(expr,value) __builtin_expect ((expr),(value))
		227	# define inline_size static inline /* inline for codesize */
		228	# if EV_MINIMAL
		229	# define noinline __attribute__ ((noinline))
		230	# define inline_speed static noinline
		231	# else
		232	# define noinline
		233	# define inline_speed static inline
		234	# endif
		235	#else
		236	# define expect(expr,value) (expr)
		237	# define inline_speed static
		238	# define inline_size static
		239	# define noinline
		240	#endif
68		241
		242	#define expect_false(expr) expect ((expr) != 0, 0)
		243	#define expect_true(expr) expect ((expr) != 0, 1)
		244
		245	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		246	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
		247
		248	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		249	#define EMPTY2(a,b) /* used to suppress some warnings */
		250
69	typedef struct ev_watcher *W;	251	typedef ev_watcher *W;
70	typedef struct ev_watcher_list *WL;	252	typedef ev_watcher_list *WL;
71	typedef struct ev_watcher_time *WT;	253	typedef ev_watcher_time *WT;
72		254
73	static ev_tstamp now, diff; /* monotonic clock */	255	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		256
		257	#ifdef _WIN32
		258	# include "ev_win32.c"
		259	#endif
		260
		261	/*****************************************************************************/
		262
		263	static void (*syserr_cb)(const char *msg);
		264
		265	void
		266	ev_set_syserr_cb (void (*cb)(const char *msg))
		267	{
		268	syserr_cb = cb;
		269	}
		270
		271	static void noinline
		272	syserr (const char *msg)
		273	{
		274	if (!msg)
		275	msg = "(libev) system error";
		276
		277	if (syserr_cb)
		278	syserr_cb (msg);
		279	else
		280	{
		281	perror (msg);
		282	abort ();
		283	}
		284	}
		285
		286	static void *(*alloc)(void *ptr, long size);
		287
		288	void
		289	ev_set_allocator (void *(*cb)(void *ptr, long size))
		290	{
		291	alloc = cb;
		292	}
		293
		294	inline_speed void *
		295	ev_realloc (void *ptr, long size)
		296	{
		297	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		298
		299	if (!ptr && size)
		300	{
		301	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		302	abort ();
		303	}
		304
		305	return ptr;
		306	}
		307
		308	#define ev_malloc(size) ev_realloc (0, (size))
		309	#define ev_free(ptr) ev_realloc ((ptr), 0)
		310
		311	/*****************************************************************************/
		312
		313	typedef struct
		314	{
		315	WL head;
		316	unsigned char events;
		317	unsigned char reify;
		318	#if EV_SELECT_IS_WINSOCKET
		319	SOCKET handle;
		320	#endif
		321	} ANFD;
		322
		323	typedef struct
		324	{
		325	W w;
		326	int events;
		327	} ANPENDING;
		328
		329	#if EV_USE_INOTIFY
		330	typedef struct
		331	{
		332	WL head;
		333	} ANFS;
		334	#endif
		335
		336	#if EV_MULTIPLICITY
		337
		338	struct ev_loop
		339	{
		340	ev_tstamp ev_rt_now;
		341	#define ev_rt_now ((loop)->ev_rt_now)
		342	#define VAR(name,decl) decl;
		343	#include "ev_vars.h"
		344	#undef VAR
		345	};
		346	#include "ev_wrap.h"
		347
		348	static struct ev_loop default_loop_struct;
		349	struct ev_loop *ev_default_loop_ptr;
		350
		351	#else
		352
74	ev_tstamp ev_now;	353	ev_tstamp ev_rt_now;
75	int ev_method;	354	#define VAR(name,decl) static decl;
		355	#include "ev_vars.h"
		356	#undef VAR
76		357
77	static int have_monotonic; /* runtime */	358	static int ev_default_loop_ptr;
78		359
79	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	360	#endif
80	static void (*method_modify)(int fd, int oev, int nev);
81	static void (*method_poll)(ev_tstamp timeout);
82		361
83	/*****************************************************************************/	362	/*****************************************************************************/
84		363
85	ev_tstamp	364	ev_tstamp
86	ev_time (void)	365	ev_time (void)
87	{	366	{
88	#if HAVE_REALTIME	367	#if EV_USE_REALTIME
89	struct timespec ts;	368	struct timespec ts;
90	clock_gettime (CLOCK_REALTIME, &ts);	369	clock_gettime (CLOCK_REALTIME, &ts);
91	return ts.tv_sec + ts.tv_nsec * 1e-9;	370	return ts.tv_sec + ts.tv_nsec * 1e-9;
92	#else	371	#else
93	struct timeval tv;	372	struct timeval tv;
94	gettimeofday (&tv, 0);	373	gettimeofday (&tv, 0);
95	return tv.tv_sec + tv.tv_usec * 1e-6;	374	return tv.tv_sec + tv.tv_usec * 1e-6;
96	#endif	375	#endif
97	}	376	}
98		377
99	static ev_tstamp	378	ev_tstamp inline_size
100	get_clock (void)	379	get_clock (void)
101	{	380	{
102	#if HAVE_MONOTONIC	381	#if EV_USE_MONOTONIC
103	if (have_monotonic)	382	if (expect_true (have_monotonic))
104	{	383	{
105	struct timespec ts;	384	struct timespec ts;
106	clock_gettime (CLOCK_MONOTONIC, &ts);	385	clock_gettime (CLOCK_MONOTONIC, &ts);
107	return ts.tv_sec + ts.tv_nsec * 1e-9;	386	return ts.tv_sec + ts.tv_nsec * 1e-9;
108	}	387	}
109	#endif	388	#endif
110		389
111	return ev_time ();	390	return ev_time ();
112	}	391	}
113		392
		393	#if EV_MULTIPLICITY
		394	ev_tstamp
		395	ev_now (EV_P)
		396	{
		397	return ev_rt_now;
		398	}
		399	#endif
		400
		401	int inline_size
		402	array_nextsize (int elem, int cur, int cnt)
		403	{
		404	int ncur = cur + 1;
		405
		406	do
		407	ncur <<= 1;
		408	while (cnt > ncur);
		409
		410	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		411	if (elem * ncur > 4096)
		412	{
		413	ncur *= elem;
		414	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		415	ncur = ncur - sizeof (void *) * 4;
		416	ncur /= elem;
		417	}
		418
		419	return ncur;
		420	}
		421
		422	inline_speed void *
		423	array_realloc (int elem, void *base, int *cur, int cnt)
		424	{
		425	*cur = array_nextsize (elem, *cur, cnt);
		426	return ev_realloc (base, elem * *cur);
		427	}
		428
114	#define array_needsize(base,cur,cnt,init) \	429	#define array_needsize(type,base,cur,cnt,init) \
115	if ((cnt) > cur) \	430	if (expect_false ((cnt) > (cur))) \
116	{ \	431	{ \
117	int newcnt = cur ? cur << 1 : 16; \	432	int ocur_ = (cur); \
118	base = realloc (base, sizeof (*base) * (newcnt)); \	433	(base) = (type *)array_realloc \
119	init (base + cur, newcnt - cur); \	434	(sizeof (type), (base), &(cur), (cnt)); \
120	cur = newcnt; \	435	init ((base) + (ocur_), (cur) - ocur_); \
121	}	436	}
		437
		438	#if 0
		439	#define array_slim(type,stem) \
		440	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		441	{ \
		442	stem ## max = array_roundsize (stem ## cnt >> 1); \
		443	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		444	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		445	}
		446	#endif
		447
		448	#define array_free(stem, idx) \
		449	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
122		450
123	/*****************************************************************************/	451	/*****************************************************************************/
124		452
		453	void noinline
		454	ev_feed_event (EV_P_ void *w, int revents)
		455	{
		456	W w_ = (W)w;
		457
		458	if (expect_false (w_->pending))
		459	{
		460	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		461	return;
		462	}
		463
		464	w_->pending = ++pendingcnt [ABSPRI (w_)];
		465	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		466	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		467	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		468	}
		469
		470	void inline_size
		471	queue_events (EV_P_ W *events, int eventcnt, int type)
		472	{
		473	int i;
		474
		475	for (i = 0; i < eventcnt; ++i)
		476	ev_feed_event (EV_A_ events [i], type);
		477	}
		478
		479	/*****************************************************************************/
		480
		481	void inline_size
		482	anfds_init (ANFD *base, int count)
		483	{
		484	while (count--)
		485	{
		486	base->head = 0;
		487	base->events = EV_NONE;
		488	base->reify = 0;
		489
		490	++base;
		491	}
		492	}
		493
		494	void inline_speed
		495	fd_event (EV_P_ int fd, int revents)
		496	{
		497	ANFD *anfd = anfds + fd;
		498	ev_io *w;
		499
		500	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		501	{
		502	int ev = w->events & revents;
		503
		504	if (ev)
		505	ev_feed_event (EV_A_ (W)w, ev);
		506	}
		507	}
		508
		509	void
		510	ev_feed_fd_event (EV_P_ int fd, int revents)
		511	{
		512	if (fd >= 0 && fd < anfdmax)
		513	fd_event (EV_A_ fd, revents);
		514	}
		515
		516	void inline_size
		517	fd_reify (EV_P)
		518	{
		519	int i;
		520
		521	for (i = 0; i < fdchangecnt; ++i)
		522	{
		523	int fd = fdchanges [i];
		524	ANFD *anfd = anfds + fd;
		525	ev_io *w;
		526
		527	int events = 0;
		528
		529	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
		530	events |= w->events;
		531
		532	#if EV_SELECT_IS_WINSOCKET
		533	if (events)
		534	{
		535	unsigned long argp;
		536	anfd->handle = _get_osfhandle (fd);
		537	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		538	}
		539	#endif
		540
		541	anfd->reify = 0;
		542
		543	backend_modify (EV_A_ fd, anfd->events, events);
		544	anfd->events = events;
		545	}
		546
		547	fdchangecnt = 0;
		548	}
		549
		550	void inline_size
		551	fd_change (EV_P_ int fd)
		552	{
		553	if (expect_false (anfds [fd].reify))
		554	return;
		555
		556	anfds [fd].reify = 1;
		557
		558	++fdchangecnt;
		559	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		560	fdchanges [fdchangecnt - 1] = fd;
		561	}
		562
		563	void inline_speed
		564	fd_kill (EV_P_ int fd)
		565	{
		566	ev_io *w;
		567
		568	while ((w = (ev_io *)anfds [fd].head))
		569	{
		570	ev_io_stop (EV_A_ w);
		571	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		572	}
		573	}
		574
		575	int inline_size
		576	fd_valid (int fd)
		577	{
		578	#ifdef _WIN32
		579	return _get_osfhandle (fd) != -1;
		580	#else
		581	return fcntl (fd, F_GETFD) != -1;
		582	#endif
		583	}
		584
		585	/* called on EBADF to verify fds */
		586	static void noinline
		587	fd_ebadf (EV_P)
		588	{
		589	int fd;
		590
		591	for (fd = 0; fd < anfdmax; ++fd)
		592	if (anfds [fd].events)
		593	if (!fd_valid (fd) == -1 && errno == EBADF)
		594	fd_kill (EV_A_ fd);
		595	}
		596
		597	/* called on ENOMEM in select/poll to kill some fds and retry */
		598	static void noinline
		599	fd_enomem (EV_P)
		600	{
		601	int fd;
		602
		603	for (fd = anfdmax; fd--; )
		604	if (anfds [fd].events)
		605	{
		606	fd_kill (EV_A_ fd);
		607	return;
		608	}
		609	}
		610
		611	/* usually called after fork if backend needs to re-arm all fds from scratch */
		612	static void noinline
		613	fd_rearm_all (EV_P)
		614	{
		615	int fd;
		616
		617	for (fd = 0; fd < anfdmax; ++fd)
		618	if (anfds [fd].events)
		619	{
		620	anfds [fd].events = 0;
		621	fd_change (EV_A_ fd);
		622	}
		623	}
		624
		625	/*****************************************************************************/
		626
		627	void inline_speed
		628	upheap (WT *heap, int k)
		629	{
		630	WT w = heap [k];
		631
		632	while (k && heap [k >> 1]->at > w->at)
		633	{
		634	heap [k] = heap [k >> 1];
		635	((W)heap [k])->active = k + 1;
		636	k >>= 1;
		637	}
		638
		639	heap [k] = w;
		640	((W)heap [k])->active = k + 1;
		641
		642	}
		643
		644	void inline_speed
		645	downheap (WT *heap, int N, int k)
		646	{
		647	WT w = heap [k];
		648
		649	while (k < (N >> 1))
		650	{
		651	int j = k << 1;
		652
		653	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		654	++j;
		655
		656	if (w->at <= heap [j]->at)
		657	break;
		658
		659	heap [k] = heap [j];
		660	((W)heap [k])->active = k + 1;
		661	k = j;
		662	}
		663
		664	heap [k] = w;
		665	((W)heap [k])->active = k + 1;
		666	}
		667
		668	void inline_size
		669	adjustheap (WT *heap, int N, int k)
		670	{
		671	upheap (heap, k);
		672	downheap (heap, N, k);
		673	}
		674
		675	/*****************************************************************************/
		676
125	typedef struct	677	typedef struct
126	{	678	{
127	struct ev_io *head;	679	WL head;
128	unsigned char wev, rev; /* want, received event set */
129	} ANFD;
130
131	static ANFD *anfds;
132	static int anfdmax;
133
134	static int *fdchanges;
135	static int fdchangemax, fdchangecnt;
136
137	static void
138	anfds_init (ANFD *base, int count)
139	{
140	while (count--)
141	{
142	base->head = 0;
143	base->wev = base->rev = EV_NONE;
144	++base;
145	}
146	}
147
148	typedef struct
149	{
150	W w;
151	int events;
152	} ANPENDING;
153
154	static ANPENDING *pendings;
155	static int pendingmax, pendingcnt;
156
157	static void
158	event (W w, int events)
159	{
160	if (w->active)
161	{
162	w->pending = ++pendingcnt;
163	array_needsize (pendings, pendingmax, pendingcnt, );
164	pendings [pendingcnt - 1].w = w;
165	pendings [pendingcnt - 1].events = events;
166	}
167	}
168
169	static void
170	fd_event (int fd, int events)
171	{
172	ANFD *anfd = anfds + fd;
173	struct ev_io *w;
174
175	for (w = anfd->head; w; w = w->next)
176	{
177	int ev = w->events & events;
178
179	if (ev)
180	event ((W)w, ev);
181	}
182	}
183
184	static void
185	queue_events (W *events, int eventcnt, int type)
186	{
187	int i;
188
189	for (i = 0; i < eventcnt; ++i)
190	event (events [i], type);
191	}
192
193	/*****************************************************************************/
194
195	static struct ev_timer **timers;
196	static int timermax, timercnt;
197
198	static struct ev_periodic **periodics;
199	static int periodicmax, periodiccnt;
200
201	static void
202	upheap (WT *timers, int k)
203	{
204	WT w = timers [k];
205
206	while (k && timers [k >> 1]->at > w->at)
207	{
208	timers [k] = timers [k >> 1];
209	timers [k]->active = k + 1;
210	k >>= 1;
211	}
212
213	timers [k] = w;
214	timers [k]->active = k + 1;
215
216	}
217
218	static void
219	downheap (WT *timers, int N, int k)
220	{
221	WT w = timers [k];
222
223	while (k < (N >> 1))
224	{
225	int j = k << 1;
226
227	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
228	++j;
229
230	if (w->at <= timers [j]->at)
231	break;
232
233	timers [k] = timers [j];
234	timers [k]->active = k + 1;
235	k = j;
236	}
237
238	timers [k] = w;
239	timers [k]->active = k + 1;
240	}
241
242	/*****************************************************************************/
243
244	typedef struct
245	{
246	struct ev_signal *head;
247	sig_atomic_t gotsig;	680	sig_atomic_t volatile gotsig;
248	} ANSIG;	681	} ANSIG;
249		682
250	static ANSIG *signals;	683	static ANSIG *signals;
251	static int signalmax;	684	static int signalmax;
252		685
253	static int sigpipe [2];	686	static int sigpipe [2];
254	static sig_atomic_t gotsig;	687	static sig_atomic_t volatile gotsig;
255	static struct ev_io sigev;	688	static ev_io sigev;
256		689
257	static void	690	void inline_size
258	signals_init (ANSIG *base, int count)	691	signals_init (ANSIG *base, int count)
259	{	692	{
260	while (count--)	693	while (count--)
261	{	694	{
262	base->head = 0;	695	base->head = 0;
263	base->gotsig = 0;	696	base->gotsig = 0;
		697
264	++base;	698	++base;
265	}	699	}
266	}	700	}
267		701
268	static void	702	static void
269	sighandler (int signum)	703	sighandler (int signum)
270	{	704	{
		705	#if _WIN32
		706	signal (signum, sighandler);
		707	#endif
		708
271	signals [signum - 1].gotsig = 1;	709	signals [signum - 1].gotsig = 1;
272		710
273	if (!gotsig)	711	if (!gotsig)
274	{	712	{
		713	int old_errno = errno;
275	gotsig = 1;	714	gotsig = 1;
276	write (sigpipe [1], &gotsig, 1);	715	write (sigpipe [1], &signum, 1);
		716	errno = old_errno;
277	}	717	}
		718	}
		719
		720	void noinline
		721	ev_feed_signal_event (EV_P_ int signum)
		722	{
		723	WL w;
		724
		725	#if EV_MULTIPLICITY
		726	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		727	#endif
		728
		729	--signum;
		730
		731	if (signum < 0 || signum >= signalmax)
		732	return;
		733
		734	signals [signum].gotsig = 0;
		735
		736	for (w = signals [signum].head; w; w = w->next)
		737	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
278	}	738	}
279		739
280	static void	740	static void
281	sigcb (struct ev_io *iow, int revents)	741	sigcb (EV_P_ ev_io *iow, int revents)
282	{	742	{
283	struct ev_signal *w;
284	int sig;	743	int signum;
285		744
		745	read (sigpipe [0], &revents, 1);
286	gotsig = 0;	746	gotsig = 0;
287	read (sigpipe [0], &revents, 1);
288		747
289	for (sig = signalmax; sig--; )	748	for (signum = signalmax; signum--; )
290	if (signals [sig].gotsig)	749	if (signals [signum].gotsig)
		750	ev_feed_signal_event (EV_A_ signum + 1);
		751	}
		752
		753	void inline_size
		754	fd_intern (int fd)
		755	{
		756	#ifdef _WIN32
		757	int arg = 1;
		758	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		759	#else
		760	fcntl (fd, F_SETFD, FD_CLOEXEC);
		761	fcntl (fd, F_SETFL, O_NONBLOCK);
		762	#endif
		763	}
		764
		765	static void noinline
		766	siginit (EV_P)
		767	{
		768	fd_intern (sigpipe [0]);
		769	fd_intern (sigpipe [1]);
		770
		771	ev_io_set (&sigev, sigpipe [0], EV_READ);
		772	ev_io_start (EV_A_ &sigev);
		773	ev_unref (EV_A); /* child watcher should not keep loop alive */
		774	}
		775
		776	/*****************************************************************************/
		777
		778	static ev_child *childs [EV_PID_HASHSIZE];
		779
		780	#ifndef _WIN32
		781
		782	static ev_signal childev;
		783
		784	void inline_speed
		785	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		786	{
		787	ev_child *w;
		788
		789	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		790	if (w->pid == pid || !w->pid)
291	{	791	{
292	signals [sig].gotsig = 0;	792	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
293		793	w->rpid = pid;
294	for (w = signals [sig].head; w; w = w->next)	794	w->rstatus = status;
295	event ((W)w, EV_SIGNAL);	795	ev_feed_event (EV_A_ (W)w, EV_CHILD);
296	}	796	}
297	}	797	}
298		798
		799	#ifndef WCONTINUED
		800	# define WCONTINUED 0
		801	#endif
		802
299	static void	803	static void
300	siginit (void)	804	childcb (EV_P_ ev_signal *sw, int revents)
301	{	805	{
302	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	806	int pid, status;
303	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
304		807
305	/* rather than sort out wether we really need nb, set it */	808	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
306	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	809	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
307	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	810	if (!WCONTINUED
		811	|| errno != EINVAL
		812	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		813	return;
308		814
309	evio_set (&sigev, sigpipe [0], EV_READ);	815	/* make sure we are called again until all childs have been reaped */
310	evio_start (&sigev);	816	/* we need to do it this way so that the callback gets called before we continue */
		817	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		818
		819	child_reap (EV_A_ sw, pid, pid, status);
		820	if (EV_PID_HASHSIZE > 1)
		821	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
311	}	822	}
		823
		824	#endif
312		825
313	/*****************************************************************************/	826	/*****************************************************************************/
314		827
315	static struct ev_idle **idles;	828	#if EV_USE_PORT
316	static int idlemax, idlecnt;	829	# include "ev_port.c"
		830	#endif
		831	#if EV_USE_KQUEUE
		832	# include "ev_kqueue.c"
		833	#endif
		834	#if EV_USE_EPOLL
		835	# include "ev_epoll.c"
		836	#endif
		837	#if EV_USE_POLL
		838	# include "ev_poll.c"
		839	#endif
		840	#if EV_USE_SELECT
		841	# include "ev_select.c"
		842	#endif
317		843
318	static struct ev_check **checks;	844	int
319	static int checkmax, checkcnt;	845	ev_version_major (void)
		846	{
		847	return EV_VERSION_MAJOR;
		848	}
		849
		850	int
		851	ev_version_minor (void)
		852	{
		853	return EV_VERSION_MINOR;
		854	}
		855
		856	/* return true if we are running with elevated privileges and should ignore env variables */
		857	int inline_size
		858	enable_secure (void)
		859	{
		860	#ifdef _WIN32
		861	return 0;
		862	#else
		863	return getuid () != geteuid ()
		864	|| getgid () != getegid ();
		865	#endif
		866	}
		867
		868	unsigned int
		869	ev_supported_backends (void)
		870	{
		871	unsigned int flags = 0;
		872
		873	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		874	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		875	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		876	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		877	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		878
		879	return flags;
		880	}
		881
		882	unsigned int
		883	ev_recommended_backends (void)
		884	{
		885	unsigned int flags = ev_supported_backends ();
		886
		887	#ifndef __NetBSD__
		888	/* kqueue is borked on everything but netbsd apparently */
		889	/* it usually doesn't work correctly on anything but sockets and pipes */
		890	flags &= ~EVBACKEND_KQUEUE;
		891	#endif
		892	#ifdef __APPLE__
		893	// flags &= ~EVBACKEND_KQUEUE; for documentation
		894	flags &= ~EVBACKEND_POLL;
		895	#endif
		896
		897	return flags;
		898	}
		899
		900	unsigned int
		901	ev_embeddable_backends (void)
		902	{
		903	return EVBACKEND_EPOLL
		904	| EVBACKEND_KQUEUE
		905	| EVBACKEND_PORT;
		906	}
		907
		908	unsigned int
		909	ev_backend (EV_P)
		910	{
		911	return backend;
		912	}
		913
		914	unsigned int
		915	ev_loop_count (EV_P)
		916	{
		917	return loop_count;
		918	}
		919
		920	static void noinline
		921	loop_init (EV_P_ unsigned int flags)
		922	{
		923	if (!backend)
		924	{
		925	#if EV_USE_MONOTONIC
		926	{
		927	struct timespec ts;
		928	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		929	have_monotonic = 1;
		930	}
		931	#endif
		932
		933	ev_rt_now = ev_time ();
		934	mn_now = get_clock ();
		935	now_floor = mn_now;
		936	rtmn_diff = ev_rt_now - mn_now;
		937
		938	/* pid check not overridable via env */
		939	#ifndef _WIN32
		940	if (flags & EVFLAG_FORKCHECK)
		941	curpid = getpid ();
		942	#endif
		943
		944	if (!(flags & EVFLAG_NOENV)
		945	&& !enable_secure ()
		946	&& getenv ("LIBEV_FLAGS"))
		947	flags = atoi (getenv ("LIBEV_FLAGS"));
		948
		949	if (!(flags & 0x0000ffffUL))
		950	flags |= ev_recommended_backends ();
		951
		952	backend = 0;
		953	backend_fd = -1;
		954	#if EV_USE_INOTIFY
		955	fs_fd = -2;
		956	#endif
		957
		958	#if EV_USE_PORT
		959	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		960	#endif
		961	#if EV_USE_KQUEUE
		962	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		963	#endif
		964	#if EV_USE_EPOLL
		965	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		966	#endif
		967	#if EV_USE_POLL
		968	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		969	#endif
		970	#if EV_USE_SELECT
		971	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		972	#endif
		973
		974	ev_init (&sigev, sigcb);
		975	ev_set_priority (&sigev, EV_MAXPRI);
		976	}
		977	}
		978
		979	static void noinline
		980	loop_destroy (EV_P)
		981	{
		982	int i;
		983
		984	#if EV_USE_INOTIFY
		985	if (fs_fd >= 0)
		986	close (fs_fd);
		987	#endif
		988
		989	if (backend_fd >= 0)
		990	close (backend_fd);
		991
		992	#if EV_USE_PORT
		993	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		994	#endif
		995	#if EV_USE_KQUEUE
		996	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		997	#endif
		998	#if EV_USE_EPOLL
		999	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		1000	#endif
		1001	#if EV_USE_POLL
		1002	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1003	#endif
		1004	#if EV_USE_SELECT
		1005	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1006	#endif
		1007
		1008	for (i = NUMPRI; i--; )
		1009	{
		1010	array_free (pending, [i]);
		1011	#if EV_IDLE_ENABLE
		1012	array_free (idle, [i]);
		1013	#endif
		1014	}
		1015
		1016	/* have to use the microsoft-never-gets-it-right macro */
		1017	array_free (fdchange, EMPTY);
		1018	array_free (timer, EMPTY);
		1019	#if EV_PERIODIC_ENABLE
		1020	array_free (periodic, EMPTY);
		1021	#endif
		1022	array_free (prepare, EMPTY);
		1023	array_free (check, EMPTY);
		1024
		1025	backend = 0;
		1026	}
		1027
		1028	void inline_size infy_fork (EV_P);
		1029
		1030	void inline_size
		1031	loop_fork (EV_P)
		1032	{
		1033	#if EV_USE_PORT
		1034	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1035	#endif
		1036	#if EV_USE_KQUEUE
		1037	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1038	#endif
		1039	#if EV_USE_EPOLL
		1040	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1041	#endif
		1042	#if EV_USE_INOTIFY
		1043	infy_fork (EV_A);
		1044	#endif
		1045
		1046	if (ev_is_active (&sigev))
		1047	{
		1048	/* default loop */
		1049
		1050	ev_ref (EV_A);
		1051	ev_io_stop (EV_A_ &sigev);
		1052	close (sigpipe [0]);
		1053	close (sigpipe [1]);
		1054
		1055	while (pipe (sigpipe))
		1056	syserr ("(libev) error creating pipe");
		1057
		1058	siginit (EV_A);
		1059	}
		1060
		1061	postfork = 0;
		1062	}
		1063
		1064	#if EV_MULTIPLICITY
		1065	struct ev_loop *
		1066	ev_loop_new (unsigned int flags)
		1067	{
		1068	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1069
		1070	memset (loop, 0, sizeof (struct ev_loop));
		1071
		1072	loop_init (EV_A_ flags);
		1073
		1074	if (ev_backend (EV_A))
		1075	return loop;
		1076
		1077	return 0;
		1078	}
		1079
		1080	void
		1081	ev_loop_destroy (EV_P)
		1082	{
		1083	loop_destroy (EV_A);
		1084	ev_free (loop);
		1085	}
		1086
		1087	void
		1088	ev_loop_fork (EV_P)
		1089	{
		1090	postfork = 1;
		1091	}
		1092
		1093	#endif
		1094
		1095	#if EV_MULTIPLICITY
		1096	struct ev_loop *
		1097	ev_default_loop_init (unsigned int flags)
		1098	#else
		1099	int
		1100	ev_default_loop (unsigned int flags)
		1101	#endif
		1102	{
		1103	if (sigpipe [0] == sigpipe [1])
		1104	if (pipe (sigpipe))
		1105	return 0;
		1106
		1107	if (!ev_default_loop_ptr)
		1108	{
		1109	#if EV_MULTIPLICITY
		1110	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1111	#else
		1112	ev_default_loop_ptr = 1;
		1113	#endif
		1114
		1115	loop_init (EV_A_ flags);
		1116
		1117	if (ev_backend (EV_A))
		1118	{
		1119	siginit (EV_A);
		1120
		1121	#ifndef _WIN32
		1122	ev_signal_init (&childev, childcb, SIGCHLD);
		1123	ev_set_priority (&childev, EV_MAXPRI);
		1124	ev_signal_start (EV_A_ &childev);
		1125	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1126	#endif
		1127	}
		1128	else
		1129	ev_default_loop_ptr = 0;
		1130	}
		1131
		1132	return ev_default_loop_ptr;
		1133	}
		1134
		1135	void
		1136	ev_default_destroy (void)
		1137	{
		1138	#if EV_MULTIPLICITY
		1139	struct ev_loop *loop = ev_default_loop_ptr;
		1140	#endif
		1141
		1142	#ifndef _WIN32
		1143	ev_ref (EV_A); /* child watcher */
		1144	ev_signal_stop (EV_A_ &childev);
		1145	#endif
		1146
		1147	ev_ref (EV_A); /* signal watcher */
		1148	ev_io_stop (EV_A_ &sigev);
		1149
		1150	close (sigpipe [0]); sigpipe [0] = 0;
		1151	close (sigpipe [1]); sigpipe [1] = 0;
		1152
		1153	loop_destroy (EV_A);
		1154	}
		1155
		1156	void
		1157	ev_default_fork (void)
		1158	{
		1159	#if EV_MULTIPLICITY
		1160	struct ev_loop *loop = ev_default_loop_ptr;
		1161	#endif
		1162
		1163	if (backend)
		1164	postfork = 1;
		1165	}
320		1166
321	/*****************************************************************************/	1167	/*****************************************************************************/
322		1168
323	#if HAVE_EPOLL	1169	void
324	# include "ev_epoll.c"	1170	ev_invoke (EV_P_ void *w, int revents)
325	#endif
326	#if HAVE_SELECT
327	# include "ev_select.c"
328	#endif
329
330	int ev_init (int flags)
331	{	1171	{
332	#if HAVE_MONOTONIC	1172	EV_CB_INVOKE ((W)w, revents);
333	{
334	struct timespec ts;
335	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
336	have_monotonic = 1;
337	}
338	#endif
339
340	ev_now = ev_time ();
341	now = get_clock ();
342	diff = ev_now - now;
343
344	if (pipe (sigpipe))
345	return 0;
346
347	ev_method = EVMETHOD_NONE;
348	#if HAVE_EPOLL
349	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
350	#endif
351	#if HAVE_SELECT
352	if (ev_method == EVMETHOD_NONE) select_init (flags);
353	#endif
354
355	if (ev_method)
356	{
357	evw_init (&sigev, sigcb);
358	siginit ();
359	}
360
361	return ev_method;
362	}	1173	}
363		1174
364	/*****************************************************************************/	1175	void inline_speed
365		1176	call_pending (EV_P)
366	void ev_prefork (void)
367	{	1177	{
368	/* nop */
369	}
370
371	void ev_postfork_parent (void)
372	{
373	/* nop */
374	}
375
376	void ev_postfork_child (void)
377	{
378	#if HAVE_EPOLL
379	if (ev_method == EVMETHOD_EPOLL)
380	epoll_postfork_child ();
381	#endif
382
383	evio_stop (&sigev);
384	close (sigpipe [0]);
385	close (sigpipe [1]);
386	pipe (sigpipe);
387	siginit ();
388	}
389
390	/*****************************************************************************/
391
392	static void
393	fd_reify (void)
394	{
395	int i;	1178	int pri;
396		1179
397	for (i = 0; i < fdchangecnt; ++i)	1180	for (pri = NUMPRI; pri--; )
		1181	while (pendingcnt [pri])
398	{	1182	{
399	int fd = fdchanges [i];	1183	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
400	ANFD *anfd = anfds + fd;
401	struct ev_io *w;
402		1184
403	int wev = 0;	1185	if (expect_true (p->w))
404
405	for (w = anfd->head; w; w = w->next)
406	wev |= w->events;
407
408	if (anfd->wev != wev)
409	{	1186	{
410	method_modify (fd, anfd->wev, wev);	1187	/*assert (("non-pending watcher on pending list", p->w->pending));*/
411	anfd->wev = wev;
412	}
413	}
414		1188
415	fdchangecnt = 0;
416	}
417
418	static void
419	call_pending ()
420	{
421	while (pendingcnt)
422	{
423	ANPENDING *p = pendings + --pendingcnt;
424
425	if (p->w)
426	{
427	p->w->pending = 0;	1189	p->w->pending = 0;
428	p->w->cb (p->w, p->events);	1190	EV_CB_INVOKE (p->w, p->events);
429	}	1191	}
430	}	1192	}
431	}	1193	}
432		1194
433	static void	1195	void inline_size
434	timers_reify ()	1196	timers_reify (EV_P)
435	{	1197	{
436	while (timercnt && timers [0]->at <= now)	1198	while (timercnt && ((WT)timers [0])->at <= mn_now)
437	{	1199	{
438	struct ev_timer *w = timers [0];	1200	ev_timer *w = timers [0];
439		1201
440	event ((W)w, EV_TIMEOUT);	1202	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
441		1203
442	/* first reschedule or stop timer */	1204	/* first reschedule or stop timer */
443	if (w->repeat)	1205	if (w->repeat)
444	{	1206	{
		1207	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1208
445	w->at = now + w->repeat;	1209	((WT)w)->at += w->repeat;
446	assert (("timer timeout in the past, negative repeat?", w->at > now));	1210	if (((WT)w)->at < mn_now)
		1211	((WT)w)->at = mn_now;
		1212
447	downheap ((WT *)timers, timercnt, 0);	1213	downheap ((WT *)timers, timercnt, 0);
448	}	1214	}
449	else	1215	else
450	evtimer_stop (w); /* nonrepeating: stop timer */	1216	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
451	}
452	}
453		1217
454	static void	1218	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1219	}
		1220	}
		1221
		1222	#if EV_PERIODIC_ENABLE
		1223	void inline_size
455	periodics_reify ()	1224	periodics_reify (EV_P)
456	{	1225	{
457	while (periodiccnt && periodics [0]->at <= ev_now)	1226	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
458	{	1227	{
459	struct ev_periodic *w = periodics [0];	1228	ev_periodic *w = periodics [0];
		1229
		1230	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
460		1231
461	/* first reschedule or stop timer */	1232	/* first reschedule or stop timer */
462	if (w->interval)	1233	if (w->reschedule_cb)
463	{	1234	{
		1235	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1236	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1237	downheap ((WT *)periodics, periodiccnt, 0);
		1238	}
		1239	else if (w->interval)
		1240	{
464	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1241	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
465	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1242	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
466	downheap ((WT *)periodics, periodiccnt, 0);	1243	downheap ((WT *)periodics, periodiccnt, 0);
467	}	1244	}
468	else	1245	else
469	evperiodic_stop (w); /* nonrepeating: stop timer */	1246	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
470		1247
471	event ((W)w, EV_TIMEOUT);	1248	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
472	}	1249	}
473	}	1250	}
474		1251
475	static void	1252	static void noinline
476	periodics_reschedule (ev_tstamp diff)	1253	periodics_reschedule (EV_P)
477	{	1254	{
478	int i;	1255	int i;
479		1256
480	/* adjust periodics after time jump */	1257	/* adjust periodics after time jump */
481	for (i = 0; i < periodiccnt; ++i)	1258	for (i = 0; i < periodiccnt; ++i)
482	{	1259	{
483	struct ev_periodic *w = periodics [i];	1260	ev_periodic *w = periodics [i];
484		1261
		1262	if (w->reschedule_cb)
		1263	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
485	if (w->interval)	1264	else if (w->interval)
		1265	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1266	}
		1267
		1268	/* now rebuild the heap */
		1269	for (i = periodiccnt >> 1; i--; )
		1270	downheap ((WT *)periodics, periodiccnt, i);
		1271	}
		1272	#endif
		1273
		1274	#if EV_IDLE_ENABLE
		1275	void inline_size
		1276	idle_reify (EV_P)
		1277	{
		1278	if (expect_false (idleall))
		1279	{
		1280	int pri;
		1281
		1282	for (pri = NUMPRI; pri--; )
486	{	1283	{
487	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1284	if (pendingcnt [pri])
		1285	break;
488		1286
489	if (fabs (diff) >= 1e-4)	1287	if (idlecnt [pri])
490	{	1288	{
491	evperiodic_stop (w);	1289	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
492	evperiodic_start (w);	1290	break;
493
494	i = 0; /* restart loop, inefficient, but time jumps should be rare */
495	}	1291	}
496	}	1292	}
497	}	1293	}
498	}	1294	}
		1295	#endif
499		1296
500	static void	1297	int inline_size
		1298	time_update_monotonic (EV_P)
		1299	{
		1300	mn_now = get_clock ();
		1301
		1302	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1303	{
		1304	ev_rt_now = rtmn_diff + mn_now;
		1305	return 0;
		1306	}
		1307	else
		1308	{
		1309	now_floor = mn_now;
		1310	ev_rt_now = ev_time ();
		1311	return 1;
		1312	}
		1313	}
		1314
		1315	void inline_size
501	time_update ()	1316	time_update (EV_P)
502	{	1317	{
503	int i;	1318	int i;
504		1319
505	ev_now = ev_time ();	1320	#if EV_USE_MONOTONIC
506
507	if (have_monotonic)	1321	if (expect_true (have_monotonic))
508	{	1322	{
509	ev_tstamp odiff = diff;	1323	if (time_update_monotonic (EV_A))
510
511	for (i = 4; --i; ) /* loop a few times, before making important decisions */
512	{	1324	{
513	now = get_clock ();	1325	ev_tstamp odiff = rtmn_diff;
		1326
		1327	/* loop a few times, before making important decisions.
		1328	* on the choice of "4": one iteration isn't enough,
		1329	* in case we get preempted during the calls to
		1330	* ev_time and get_clock. a second call is almost guaranteed
		1331	* to succeed in that case, though. and looping a few more times
		1332	* doesn't hurt either as we only do this on time-jumps or
		1333	* in the unlikely event of having been preempted here.
		1334	*/
		1335	for (i = 4; --i; )
		1336	{
514	diff = ev_now - now;	1337	rtmn_diff = ev_rt_now - mn_now;
515		1338
516	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1339	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
517	return; /* all is well */	1340	return; /* all is well */
518		1341
519	ev_now = ev_time ();	1342	ev_rt_now = ev_time ();
		1343	mn_now = get_clock ();
		1344	now_floor = mn_now;
		1345	}
		1346
		1347	# if EV_PERIODIC_ENABLE
		1348	periodics_reschedule (EV_A);
		1349	# endif
		1350	/* no timer adjustment, as the monotonic clock doesn't jump */
		1351	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
520	}	1352	}
521
522	periodics_reschedule (diff - odiff);
523	/* no timer adjustment, as the monotonic clock doesn't jump */
524	}	1353	}
525	else	1354	else
		1355	#endif
526	{	1356	{
527	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1357	ev_rt_now = ev_time ();
		1358
		1359	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
528	{	1360	{
		1361	#if EV_PERIODIC_ENABLE
529	periodics_reschedule (ev_now - now);	1362	periodics_reschedule (EV_A);
		1363	#endif
530		1364
531	/* adjust timers. this is easy, as the offset is the same for all */	1365	/* adjust timers. this is easy, as the offset is the same for all of them */
532	for (i = 0; i < timercnt; ++i)	1366	for (i = 0; i < timercnt; ++i)
533	timers [i]->at += diff;	1367	((WT)timers [i])->at += ev_rt_now - mn_now;
534	}	1368	}
535		1369
536	now = ev_now;	1370	mn_now = ev_rt_now;
537	}
538	}
539
540	int ev_loop_done;
541
542	void ev_loop (int flags)
543	{
544	double block;
545	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
546
547	if (checkcnt)
548	{	1371	}
549	queue_events ((W *)checks, checkcnt, EV_CHECK);	1372	}
550	call_pending ();	1373
551	}	1374	void
		1375	ev_ref (EV_P)
		1376	{
		1377	++activecnt;
		1378	}
		1379
		1380	void
		1381	ev_unref (EV_P)
		1382	{
		1383	--activecnt;
		1384	}
		1385
		1386	static int loop_done;
		1387
		1388	void
		1389	ev_loop (EV_P_ int flags)
		1390	{
		1391	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1392	? EVUNLOOP_ONE
		1393	: EVUNLOOP_CANCEL;
		1394
		1395	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
552		1396
553	do	1397	do
554	{	1398	{
		1399	#ifndef _WIN32
		1400	if (expect_false (curpid)) /* penalise the forking check even more */
		1401	if (expect_false (getpid () != curpid))
		1402	{
		1403	curpid = getpid ();
		1404	postfork = 1;
		1405	}
		1406	#endif
		1407
		1408	#if EV_FORK_ENABLE
		1409	/* we might have forked, so queue fork handlers */
		1410	if (expect_false (postfork))
		1411	if (forkcnt)
		1412	{
		1413	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1414	call_pending (EV_A);
		1415	}
		1416	#endif
		1417
		1418	/* queue check watchers (and execute them) */
		1419	if (expect_false (preparecnt))
		1420	{
		1421	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1422	call_pending (EV_A);
		1423	}
		1424
		1425	if (expect_false (!activecnt))
		1426	break;
		1427
		1428	/* we might have forked, so reify kernel state if necessary */
		1429	if (expect_false (postfork))
		1430	loop_fork (EV_A);
		1431
555	/* update fd-related kernel structures */	1432	/* update fd-related kernel structures */
556	fd_reify ();	1433	fd_reify (EV_A);
557		1434
558	/* calculate blocking time */	1435	/* calculate blocking time */
		1436	{
		1437	ev_tstamp block;
559		1438
560	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1439	if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))
561	ev_now = ev_time ();	1440	block = 0.; /* do not block at all */
562
563	if (flags & EVLOOP_NONBLOCK || idlecnt)
564	block = 0.;
565	else	1441	else
566	{	1442	{
		1443	/* update time to cancel out callback processing overhead */
		1444	#if EV_USE_MONOTONIC
		1445	if (expect_true (have_monotonic))
		1446	time_update_monotonic (EV_A);
		1447	else
		1448	#endif
		1449	{
		1450	ev_rt_now = ev_time ();
		1451	mn_now = ev_rt_now;
		1452	}
		1453
567	block = MAX_BLOCKTIME;	1454	block = MAX_BLOCKTIME;
568		1455
569	if (timercnt)	1456	if (timercnt)
570	{	1457	{
571	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1458	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
572	if (block > to) block = to;	1459	if (block > to) block = to;
573	}	1460	}
574		1461
		1462	#if EV_PERIODIC_ENABLE
575	if (periodiccnt)	1463	if (periodiccnt)
576	{	1464	{
577	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1465	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
578	if (block > to) block = to;	1466	if (block > to) block = to;
579	}	1467	}
		1468	#endif
580		1469
581	if (block < 0.) block = 0.;	1470	if (expect_false (block < 0.)) block = 0.;
582	}	1471	}
583		1472
584	method_poll (block);	1473	++loop_count;
		1474	backend_poll (EV_A_ block);
		1475	}
585		1476
586	/* update ev_now, do magic */	1477	/* update ev_rt_now, do magic */
587	time_update ();	1478	time_update (EV_A);
588		1479
589	/* queue pending timers and reschedule them */	1480	/* queue pending timers and reschedule them */
		1481	timers_reify (EV_A); /* relative timers called last */
		1482	#if EV_PERIODIC_ENABLE
590	periodics_reify (); /* absolute timers first */	1483	periodics_reify (EV_A); /* absolute timers called first */
591	timers_reify (); /* relative timers second */	1484	#endif
592		1485
		1486	#if EV_IDLE_ENABLE
593	/* queue idle watchers unless io or timers are pending */	1487	/* queue idle watchers unless other events are pending */
594	if (!pendingcnt)	1488	idle_reify (EV_A);
595	queue_events ((W *)idles, idlecnt, EV_IDLE);	1489	#endif
596		1490
597	/* queue check and possibly idle watchers */	1491	/* queue check watchers, to be executed first */
		1492	if (expect_false (checkcnt))
598	queue_events ((W *)checks, checkcnt, EV_CHECK);	1493	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
599		1494
600	call_pending ();	1495	call_pending (EV_A);
601	}
602	while (!ev_loop_done);
603		1496
604	if (ev_loop_done != 2)	1497	}
		1498	while (expect_true (activecnt && !loop_done));
		1499
		1500	if (loop_done == EVUNLOOP_ONE)
		1501	loop_done = EVUNLOOP_CANCEL;
		1502	}
		1503
		1504	void
		1505	ev_unloop (EV_P_ int how)
		1506	{
605	ev_loop_done = 0;	1507	loop_done = how;
606	}	1508	}
607		1509
608	/*****************************************************************************/	1510	/*****************************************************************************/
609		1511
610	static void	1512	void inline_size
611	wlist_add (WL *head, WL elem)	1513	wlist_add (WL *head, WL elem)
612	{	1514	{
613	elem->next = *head;	1515	elem->next = *head;
614	*head = elem;	1516	*head = elem;
615	}	1517	}
616		1518
617	static void	1519	void inline_size
618	wlist_del (WL *head, WL elem)	1520	wlist_del (WL *head, WL elem)
619	{	1521	{
620	while (*head)	1522	while (*head)
621	{	1523	{
622	if (*head == elem)	1524	if (*head == elem)
…		…
627		1529
628	head = &(*head)->next;	1530	head = &(*head)->next;
629	}	1531	}
630	}	1532	}
631		1533
632	static void	1534	void inline_speed
633	ev_clear (W w)	1535	clear_pending (EV_P_ W w)
634	{	1536	{
635	if (w->pending)	1537	if (w->pending)
636	{	1538	{
637	pendings [w->pending - 1].w = 0;	1539	pendings [ABSPRI (w)][w->pending - 1].w = 0;
638	w->pending = 0;	1540	w->pending = 0;
639	}	1541	}
640	}	1542	}
641		1543
642	static void	1544	int
		1545	ev_clear_pending (EV_P_ void *w)
		1546	{
		1547	W w_ = (W)w;
		1548	int pending = w_->pending;
		1549
		1550	if (!pending)
		1551	return 0;
		1552
		1553	w_->pending = 0;
		1554	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1555	p->w = 0;
		1556
		1557	return p->events;
		1558	}
		1559
		1560	void inline_size
		1561	pri_adjust (EV_P_ W w)
		1562	{
		1563	int pri = w->priority;
		1564	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1565	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1566	w->priority = pri;
		1567	}
		1568
		1569	void inline_speed
643	ev_start (W w, int active)	1570	ev_start (EV_P_ W w, int active)
644	{	1571	{
		1572	pri_adjust (EV_A_ w);
645	w->active = active;	1573	w->active = active;
		1574	ev_ref (EV_A);
646	}	1575	}
647		1576
648	static void	1577	void inline_size
649	ev_stop (W w)	1578	ev_stop (EV_P_ W w)
650	{	1579	{
		1580	ev_unref (EV_A);
651	w->active = 0;	1581	w->active = 0;
652	}	1582	}
653		1583
654	/*****************************************************************************/	1584	/*****************************************************************************/
655		1585
656	void	1586	void
657	evio_start (struct ev_io *w)	1587	ev_io_start (EV_P_ ev_io *w)
658	{	1588	{
659	if (ev_is_active (w))
660	return;
661
662	int fd = w->fd;	1589	int fd = w->fd;
663		1590
		1591	if (expect_false (ev_is_active (w)))
		1592	return;
		1593
		1594	assert (("ev_io_start called with negative fd", fd >= 0));
		1595
664	ev_start ((W)w, 1);	1596	ev_start (EV_A_ (W)w, 1);
665	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1597	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
666	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1598	wlist_add ((WL *)&anfds[fd].head, (WL)w);
667		1599
668	++fdchangecnt;	1600	fd_change (EV_A_ fd);
669	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
670	fdchanges [fdchangecnt - 1] = fd;
671	}	1601	}
672		1602
673	void	1603	void
674	evio_stop (struct ev_io *w)	1604	ev_io_stop (EV_P_ ev_io *w)
675	{	1605	{
676	ev_clear ((W)w);	1606	clear_pending (EV_A_ (W)w);
677	if (!ev_is_active (w))	1607	if (expect_false (!ev_is_active (w)))
678	return;	1608	return;
		1609
		1610	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
679		1611
680	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1612	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
681	ev_stop ((W)w);	1613	ev_stop (EV_A_ (W)w);
682		1614
683	++fdchangecnt;	1615	fd_change (EV_A_ w->fd);
684	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
685	fdchanges [fdchangecnt - 1] = w->fd;
686	}	1616	}
687		1617
688	void	1618	void
689	evtimer_start (struct ev_timer *w)	1619	ev_timer_start (EV_P_ ev_timer *w)
690	{	1620	{
691	if (ev_is_active (w))	1621	if (expect_false (ev_is_active (w)))
692	return;	1622	return;
693		1623
694	w->at += now;	1624	((WT)w)->at += mn_now;
695		1625
696	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1626	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
697		1627
698	ev_start ((W)w, ++timercnt);	1628	ev_start (EV_A_ (W)w, ++timercnt);
699	array_needsize (timers, timermax, timercnt, );	1629	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
700	timers [timercnt - 1] = w;	1630	timers [timercnt - 1] = w;
701	upheap ((WT *)timers, timercnt - 1);	1631	upheap ((WT *)timers, timercnt - 1);
702	}
703		1632
		1633	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1634	}
		1635
704	void	1636	void
705	evtimer_stop (struct ev_timer *w)	1637	ev_timer_stop (EV_P_ ev_timer *w)
706	{	1638	{
707	ev_clear ((W)w);	1639	clear_pending (EV_A_ (W)w);
708	if (!ev_is_active (w))	1640	if (expect_false (!ev_is_active (w)))
709	return;	1641	return;
710		1642
711	if (w->active < timercnt--)	1643	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1644
		1645	{
		1646	int active = ((W)w)->active;
		1647
		1648	if (expect_true (--active < --timercnt))
712	{	1649	{
713	timers [w->active - 1] = timers [timercnt];	1650	timers [active] = timers [timercnt];
714	downheap ((WT *)timers, timercnt, w->active - 1);	1651	adjustheap ((WT *)timers, timercnt, active);
715	}	1652	}
		1653	}
716		1654
717	w->at = w->repeat;	1655	((WT)w)->at -= mn_now;
718		1656
719	ev_stop ((W)w);	1657	ev_stop (EV_A_ (W)w);
720	}	1658	}
721		1659
722	void	1660	void
723	evtimer_again (struct ev_timer *w)	1661	ev_timer_again (EV_P_ ev_timer *w)
724	{	1662	{
725	if (ev_is_active (w))	1663	if (ev_is_active (w))
726	{	1664	{
727	if (w->repeat)	1665	if (w->repeat)
728	{	1666	{
729	w->at = now + w->repeat;	1667	((WT)w)->at = mn_now + w->repeat;
730	downheap ((WT *)timers, timercnt, w->active - 1);	1668	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
731	}	1669	}
732	else	1670	else
733	evtimer_stop (w);	1671	ev_timer_stop (EV_A_ w);
734	}	1672	}
735	else if (w->repeat)	1673	else if (w->repeat)
		1674	{
		1675	w->at = w->repeat;
736	evtimer_start (w);	1676	ev_timer_start (EV_A_ w);
		1677	}
737	}	1678	}
738		1679
		1680	#if EV_PERIODIC_ENABLE
739	void	1681	void
740	evperiodic_start (struct ev_periodic *w)	1682	ev_periodic_start (EV_P_ ev_periodic *w)
741	{	1683	{
742	if (ev_is_active (w))	1684	if (expect_false (ev_is_active (w)))
743	return;	1685	return;
744		1686
745	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1687	if (w->reschedule_cb)
746		1688	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1689	else if (w->interval)
		1690	{
		1691	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
747	/* this formula differs from the one in periodic_reify because we do not always round up */	1692	/* this formula differs from the one in periodic_reify because we do not always round up */
748	if (w->interval)
749	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1693	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1694	}
750		1695
751	ev_start ((W)w, ++periodiccnt);	1696	ev_start (EV_A_ (W)w, ++periodiccnt);
752	array_needsize (periodics, periodicmax, periodiccnt, );	1697	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
753	periodics [periodiccnt - 1] = w;	1698	periodics [periodiccnt - 1] = w;
754	upheap ((WT *)periodics, periodiccnt - 1);	1699	upheap ((WT *)periodics, periodiccnt - 1);
755	}
756		1700
		1701	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1702	}
		1703
757	void	1704	void
758	evperiodic_stop (struct ev_periodic *w)	1705	ev_periodic_stop (EV_P_ ev_periodic *w)
759	{	1706	{
760	ev_clear ((W)w);	1707	clear_pending (EV_A_ (W)w);
761	if (!ev_is_active (w))	1708	if (expect_false (!ev_is_active (w)))
762	return;	1709	return;
763		1710
764	if (w->active < periodiccnt--)	1711	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1712
		1713	{
		1714	int active = ((W)w)->active;
		1715
		1716	if (expect_true (--active < --periodiccnt))
765	{	1717	{
766	periodics [w->active - 1] = periodics [periodiccnt];	1718	periodics [active] = periodics [periodiccnt];
767	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1719	adjustheap ((WT *)periodics, periodiccnt, active);
768	}	1720	}
		1721	}
769		1722
770	ev_stop ((W)w);	1723	ev_stop (EV_A_ (W)w);
771	}	1724	}
772		1725
773	void	1726	void
		1727	ev_periodic_again (EV_P_ ev_periodic *w)
		1728	{
		1729	/* TODO: use adjustheap and recalculation */
		1730	ev_periodic_stop (EV_A_ w);
		1731	ev_periodic_start (EV_A_ w);
		1732	}
		1733	#endif
		1734
		1735	#ifndef SA_RESTART
		1736	# define SA_RESTART 0
		1737	#endif
		1738
		1739	void
774	evsignal_start (struct ev_signal *w)	1740	ev_signal_start (EV_P_ ev_signal *w)
775	{	1741	{
		1742	#if EV_MULTIPLICITY
		1743	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1744	#endif
776	if (ev_is_active (w))	1745	if (expect_false (ev_is_active (w)))
777	return;	1746	return;
778		1747
		1748	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1749
779	ev_start ((W)w, 1);	1750	ev_start (EV_A_ (W)w, 1);
780	array_needsize (signals, signalmax, w->signum, signals_init);	1751	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
781	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1752	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
782		1753
783	if (!w->next)	1754	if (!((WL)w)->next)
784	{	1755	{
		1756	#if _WIN32
		1757	signal (w->signum, sighandler);
		1758	#else
785	struct sigaction sa;	1759	struct sigaction sa;
786	sa.sa_handler = sighandler;	1760	sa.sa_handler = sighandler;
787	sigfillset (&sa.sa_mask);	1761	sigfillset (&sa.sa_mask);
788	sa.sa_flags = 0;	1762	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
789	sigaction (w->signum, &sa, 0);	1763	sigaction (w->signum, &sa, 0);
		1764	#endif
790	}	1765	}
791	}	1766	}
792		1767
793	void	1768	void
794	evsignal_stop (struct ev_signal *w)	1769	ev_signal_stop (EV_P_ ev_signal *w)
795	{	1770	{
796	ev_clear ((W)w);	1771	clear_pending (EV_A_ (W)w);
797	if (!ev_is_active (w))	1772	if (expect_false (!ev_is_active (w)))
798	return;	1773	return;
799		1774
800	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1775	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
801	ev_stop ((W)w);	1776	ev_stop (EV_A_ (W)w);
802		1777
803	if (!signals [w->signum - 1].head)	1778	if (!signals [w->signum - 1].head)
804	signal (w->signum, SIG_DFL);	1779	signal (w->signum, SIG_DFL);
805	}	1780	}
806		1781
807	void evidle_start (struct ev_idle *w)	1782	void
		1783	ev_child_start (EV_P_ ev_child *w)
808	{	1784	{
		1785	#if EV_MULTIPLICITY
		1786	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1787	#endif
809	if (ev_is_active (w))	1788	if (expect_false (ev_is_active (w)))
810	return;	1789	return;
811		1790
812	ev_start ((W)w, ++idlecnt);	1791	ev_start (EV_A_ (W)w, 1);
813	array_needsize (idles, idlemax, idlecnt, );	1792	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
814	idles [idlecnt - 1] = w;
815	}	1793	}
816		1794
817	void evidle_stop (struct ev_idle *w)	1795	void
		1796	ev_child_stop (EV_P_ ev_child *w)
818	{	1797	{
819	ev_clear ((W)w);	1798	clear_pending (EV_A_ (W)w);
820	if (ev_is_active (w))	1799	if (expect_false (!ev_is_active (w)))
821	return;	1800	return;
822		1801
823	idles [w->active - 1] = idles [--idlecnt];	1802	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
824	ev_stop ((W)w);	1803	ev_stop (EV_A_ (W)w);
825	}	1804	}
826		1805
		1806	#if EV_STAT_ENABLE
		1807
		1808	# ifdef _WIN32
		1809	# undef lstat
		1810	# define lstat(a,b) _stati64 (a,b)
		1811	# endif
		1812
		1813	#define DEF_STAT_INTERVAL 5.0074891
		1814	#define MIN_STAT_INTERVAL 0.1074891
		1815
		1816	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1817
		1818	#if EV_USE_INOTIFY
		1819	# define EV_INOTIFY_BUFSIZE 8192
		1820
		1821	static void noinline
		1822	infy_add (EV_P_ ev_stat *w)
		1823	{
		1824	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);
		1825
		1826	if (w->wd < 0)
		1827	{
		1828	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1829
		1830	/* monitor some parent directory for speedup hints */
		1831	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1832	{
		1833	char path [4096];
		1834	strcpy (path, w->path);
		1835
		1836	do
		1837	{
		1838	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1839	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1840
		1841	char *pend = strrchr (path, '/');
		1842
		1843	if (!pend)
		1844	break; /* whoops, no '/', complain to your admin */
		1845
		1846	*pend = 0;
		1847	w->wd = inotify_add_watch (fs_fd, path, mask);
		1848	}
		1849	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1850	}
		1851	}
		1852	else
		1853	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1854
		1855	if (w->wd >= 0)
		1856	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1857	}
		1858
		1859	static void noinline
		1860	infy_del (EV_P_ ev_stat *w)
		1861	{
		1862	int slot;
		1863	int wd = w->wd;
		1864
		1865	if (wd < 0)
		1866	return;
		1867
		1868	w->wd = -2;
		1869	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1870	wlist_del (&fs_hash [slot].head, (WL)w);
		1871
		1872	/* remove this watcher, if others are watching it, they will rearm */
		1873	inotify_rm_watch (fs_fd, wd);
		1874	}
		1875
		1876	static void noinline
		1877	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1878	{
		1879	if (slot < 0)
		1880	/* overflow, need to check for all hahs slots */
		1881	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1882	infy_wd (EV_A_ slot, wd, ev);
		1883	else
		1884	{
		1885	WL w_;
		1886
		1887	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1888	{
		1889	ev_stat *w = (ev_stat *)w_;
		1890	w_ = w_->next; /* lets us remove this watcher and all before it */
		1891
		1892	if (w->wd == wd || wd == -1)
		1893	{
		1894	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		1895	{
		1896	w->wd = -1;
		1897	infy_add (EV_A_ w); /* re-add, no matter what */
		1898	}
		1899
		1900	stat_timer_cb (EV_A_ &w->timer, 0);
		1901	}
		1902	}
		1903	}
		1904	}
		1905
		1906	static void
		1907	infy_cb (EV_P_ ev_io *w, int revents)
		1908	{
		1909	char buf [EV_INOTIFY_BUFSIZE];
		1910	struct inotify_event *ev = (struct inotify_event *)buf;
		1911	int ofs;
		1912	int len = read (fs_fd, buf, sizeof (buf));
		1913
		1914	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1915	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1916	}
		1917
		1918	void inline_size
		1919	infy_init (EV_P)
		1920	{
		1921	if (fs_fd != -2)
		1922	return;
		1923
		1924	fs_fd = inotify_init ();
		1925
		1926	if (fs_fd >= 0)
		1927	{
		1928	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1929	ev_set_priority (&fs_w, EV_MAXPRI);
		1930	ev_io_start (EV_A_ &fs_w);
		1931	}
		1932	}
		1933
		1934	void inline_size
		1935	infy_fork (EV_P)
		1936	{
		1937	int slot;
		1938
		1939	if (fs_fd < 0)
		1940	return;
		1941
		1942	close (fs_fd);
		1943	fs_fd = inotify_init ();
		1944
		1945	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1946	{
		1947	WL w_ = fs_hash [slot].head;
		1948	fs_hash [slot].head = 0;
		1949
		1950	while (w_)
		1951	{
		1952	ev_stat *w = (ev_stat *)w_;
		1953	w_ = w_->next; /* lets us add this watcher */
		1954
		1955	w->wd = -1;
		1956
		1957	if (fs_fd >= 0)
		1958	infy_add (EV_A_ w); /* re-add, no matter what */
		1959	else
		1960	ev_timer_start (EV_A_ &w->timer);
		1961	}
		1962
		1963	}
		1964	}
		1965
		1966	#endif
		1967
		1968	void
		1969	ev_stat_stat (EV_P_ ev_stat *w)
		1970	{
		1971	if (lstat (w->path, &w->attr) < 0)
		1972	w->attr.st_nlink = 0;
		1973	else if (!w->attr.st_nlink)
		1974	w->attr.st_nlink = 1;
		1975	}
		1976
		1977	static void noinline
		1978	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1979	{
		1980	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		1981
		1982	/* we copy this here each the time so that */
		1983	/* prev has the old value when the callback gets invoked */
		1984	w->prev = w->attr;
		1985	ev_stat_stat (EV_A_ w);
		1986
		1987	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		1988	if (
		1989	w->prev.st_dev != w->attr.st_dev
		1990	|| w->prev.st_ino != w->attr.st_ino
		1991	|| w->prev.st_mode != w->attr.st_mode
		1992	|| w->prev.st_nlink != w->attr.st_nlink
		1993	|| w->prev.st_uid != w->attr.st_uid
		1994	|| w->prev.st_gid != w->attr.st_gid
		1995	|| w->prev.st_rdev != w->attr.st_rdev
		1996	|| w->prev.st_size != w->attr.st_size
		1997	|| w->prev.st_atime != w->attr.st_atime
		1998	|| w->prev.st_mtime != w->attr.st_mtime
		1999	|| w->prev.st_ctime != w->attr.st_ctime
		2000	) {
		2001	#if EV_USE_INOTIFY
		2002	infy_del (EV_A_ w);
		2003	infy_add (EV_A_ w);
		2004	ev_stat_stat (EV_A_ w); /* avoid race... */
		2005	#endif
		2006
		2007	ev_feed_event (EV_A_ w, EV_STAT);
		2008	}
		2009	}
		2010
		2011	void
		2012	ev_stat_start (EV_P_ ev_stat *w)
		2013	{
		2014	if (expect_false (ev_is_active (w)))
		2015	return;
		2016
		2017	/* since we use memcmp, we need to clear any padding data etc. */
		2018	memset (&w->prev, 0, sizeof (ev_statdata));
		2019	memset (&w->attr, 0, sizeof (ev_statdata));
		2020
		2021	ev_stat_stat (EV_A_ w);
		2022
		2023	if (w->interval < MIN_STAT_INTERVAL)
		2024	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2025
		2026	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2027	ev_set_priority (&w->timer, ev_priority (w));
		2028
		2029	#if EV_USE_INOTIFY
		2030	infy_init (EV_A);
		2031
		2032	if (fs_fd >= 0)
		2033	infy_add (EV_A_ w);
		2034	else
		2035	#endif
		2036	ev_timer_start (EV_A_ &w->timer);
		2037
		2038	ev_start (EV_A_ (W)w, 1);
		2039	}
		2040
		2041	void
		2042	ev_stat_stop (EV_P_ ev_stat *w)
		2043	{
		2044	clear_pending (EV_A_ (W)w);
		2045	if (expect_false (!ev_is_active (w)))
		2046	return;
		2047
		2048	#if EV_USE_INOTIFY
		2049	infy_del (EV_A_ w);
		2050	#endif
		2051	ev_timer_stop (EV_A_ &w->timer);
		2052
		2053	ev_stop (EV_A_ (W)w);
		2054	}
		2055	#endif
		2056
		2057	#if EV_IDLE_ENABLE
		2058	void
		2059	ev_idle_start (EV_P_ ev_idle *w)
		2060	{
		2061	if (expect_false (ev_is_active (w)))
		2062	return;
		2063
		2064	pri_adjust (EV_A_ (W)w);
		2065
		2066	{
		2067	int active = ++idlecnt [ABSPRI (w)];
		2068
		2069	++idleall;
		2070	ev_start (EV_A_ (W)w, active);
		2071
		2072	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2073	idles [ABSPRI (w)][active - 1] = w;
		2074	}
		2075	}
		2076
		2077	void
		2078	ev_idle_stop (EV_P_ ev_idle *w)
		2079	{
		2080	clear_pending (EV_A_ (W)w);
		2081	if (expect_false (!ev_is_active (w)))
		2082	return;
		2083
		2084	{
		2085	int active = ((W)w)->active;
		2086
		2087	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2088	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2089
		2090	ev_stop (EV_A_ (W)w);
		2091	--idleall;
		2092	}
		2093	}
		2094	#endif
		2095
		2096	void
		2097	ev_prepare_start (EV_P_ ev_prepare *w)
		2098	{
		2099	if (expect_false (ev_is_active (w)))
		2100	return;
		2101
		2102	ev_start (EV_A_ (W)w, ++preparecnt);
		2103	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2104	prepares [preparecnt - 1] = w;
		2105	}
		2106
		2107	void
		2108	ev_prepare_stop (EV_P_ ev_prepare *w)
		2109	{
		2110	clear_pending (EV_A_ (W)w);
		2111	if (expect_false (!ev_is_active (w)))
		2112	return;
		2113
		2114	{
		2115	int active = ((W)w)->active;
		2116	prepares [active - 1] = prepares [--preparecnt];
		2117	((W)prepares [active - 1])->active = active;
		2118	}
		2119
		2120	ev_stop (EV_A_ (W)w);
		2121	}
		2122
		2123	void
827	void evcheck_start (struct ev_check *w)	2124	ev_check_start (EV_P_ ev_check *w)
828	{	2125	{
829	if (ev_is_active (w))	2126	if (expect_false (ev_is_active (w)))
830	return;	2127	return;
831		2128
832	ev_start ((W)w, ++checkcnt);	2129	ev_start (EV_A_ (W)w, ++checkcnt);
833	array_needsize (checks, checkmax, checkcnt, );	2130	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
834	checks [checkcnt - 1] = w;	2131	checks [checkcnt - 1] = w;
835	}	2132	}
836		2133
		2134	void
837	void evcheck_stop (struct ev_check *w)	2135	ev_check_stop (EV_P_ ev_check *w)
838	{	2136	{
839	ev_clear ((W)w);	2137	clear_pending (EV_A_ (W)w);
840	if (ev_is_active (w))	2138	if (expect_false (!ev_is_active (w)))
841	return;	2139	return;
842		2140
		2141	{
		2142	int active = ((W)w)->active;
843	checks [w->active - 1] = checks [--checkcnt];	2143	checks [active - 1] = checks [--checkcnt];
		2144	((W)checks [active - 1])->active = active;
		2145	}
		2146
844	ev_stop ((W)w);	2147	ev_stop (EV_A_ (W)w);
845	}	2148	}
		2149
		2150	#if EV_EMBED_ENABLE
		2151	void noinline
		2152	ev_embed_sweep (EV_P_ ev_embed *w)
		2153	{
		2154	ev_loop (w->loop, EVLOOP_NONBLOCK);
		2155	}
		2156
		2157	static void
		2158	embed_cb (EV_P_ ev_io *io, int revents)
		2159	{
		2160	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2161
		2162	if (ev_cb (w))
		2163	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2164	else
		2165	ev_embed_sweep (loop, w);
		2166	}
		2167
		2168	void
		2169	ev_embed_start (EV_P_ ev_embed *w)
		2170	{
		2171	if (expect_false (ev_is_active (w)))
		2172	return;
		2173
		2174	{
		2175	struct ev_loop *loop = w->loop;
		2176	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2177	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		2178	}
		2179
		2180	ev_set_priority (&w->io, ev_priority (w));
		2181	ev_io_start (EV_A_ &w->io);
		2182
		2183	ev_start (EV_A_ (W)w, 1);
		2184	}
		2185
		2186	void
		2187	ev_embed_stop (EV_P_ ev_embed *w)
		2188	{
		2189	clear_pending (EV_A_ (W)w);
		2190	if (expect_false (!ev_is_active (w)))
		2191	return;
		2192
		2193	ev_io_stop (EV_A_ &w->io);
		2194
		2195	ev_stop (EV_A_ (W)w);
		2196	}
		2197	#endif
		2198
		2199	#if EV_FORK_ENABLE
		2200	void
		2201	ev_fork_start (EV_P_ ev_fork *w)
		2202	{
		2203	if (expect_false (ev_is_active (w)))
		2204	return;
		2205
		2206	ev_start (EV_A_ (W)w, ++forkcnt);
		2207	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2208	forks [forkcnt - 1] = w;
		2209	}
		2210
		2211	void
		2212	ev_fork_stop (EV_P_ ev_fork *w)
		2213	{
		2214	clear_pending (EV_A_ (W)w);
		2215	if (expect_false (!ev_is_active (w)))
		2216	return;
		2217
		2218	{
		2219	int active = ((W)w)->active;
		2220	forks [active - 1] = forks [--forkcnt];
		2221	((W)forks [active - 1])->active = active;
		2222	}
		2223
		2224	ev_stop (EV_A_ (W)w);
		2225	}
		2226	#endif
846		2227
847	/*****************************************************************************/	2228	/*****************************************************************************/
848		2229
849	struct ev_once	2230	struct ev_once
850	{	2231	{
851	struct ev_io io;	2232	ev_io io;
852	struct ev_timer to;	2233	ev_timer to;
853	void (*cb)(int revents, void *arg);	2234	void (*cb)(int revents, void *arg);
854	void *arg;	2235	void *arg;
855	};	2236	};
856		2237
857	static void	2238	static void
858	once_cb (struct ev_once *once, int revents)	2239	once_cb (EV_P_ struct ev_once *once, int revents)
859	{	2240	{
860	void (*cb)(int revents, void *arg) = once->cb;	2241	void (*cb)(int revents, void *arg) = once->cb;
861	void *arg = once->arg;	2242	void *arg = once->arg;
862		2243
863	evio_stop (&once->io);	2244	ev_io_stop (EV_A_ &once->io);
864	evtimer_stop (&once->to);	2245	ev_timer_stop (EV_A_ &once->to);
865	free (once);	2246	ev_free (once);
866		2247
867	cb (revents, arg);	2248	cb (revents, arg);
868	}	2249	}
869		2250
870	static void	2251	static void
871	once_cb_io (struct ev_io *w, int revents)	2252	once_cb_io (EV_P_ ev_io *w, int revents)
872	{	2253	{
873	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2254	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
874	}	2255	}
875		2256
876	static void	2257	static void
877	once_cb_to (struct ev_timer *w, int revents)	2258	once_cb_to (EV_P_ ev_timer *w, int revents)
878	{	2259	{
879	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2260	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
880	}	2261	}
881		2262
882	void	2263	void
883	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2264	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
884	{	2265	{
885	struct ev_once *once = malloc (sizeof (struct ev_once));	2266	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
886		2267
887	if (!once)	2268	if (expect_false (!once))
888	cb (EV_ERROR, arg);	2269	{
889	else	2270	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		2271	return;
890	{	2272	}
		2273
891	once->cb = cb;	2274	once->cb = cb;
892	once->arg = arg;	2275	once->arg = arg;
893		2276
894	evw_init (&once->io, once_cb_io);	2277	ev_init (&once->io, once_cb_io);
895
896	if (fd >= 0)	2278	if (fd >= 0)
897	{	2279	{
898	evio_set (&once->io, fd, events);	2280	ev_io_set (&once->io, fd, events);
899	evio_start (&once->io);	2281	ev_io_start (EV_A_ &once->io);
900	}	2282	}
901		2283
902	evw_init (&once->to, once_cb_to);	2284	ev_init (&once->to, once_cb_to);
903
904	if (timeout >= 0.)	2285	if (timeout >= 0.)
905	{	2286	{
906	evtimer_set (&once->to, timeout, 0.);	2287	ev_timer_set (&once->to, timeout, 0.);
907	evtimer_start (&once->to);	2288	ev_timer_start (EV_A_ &once->to);
908	}
909	}
910	}
911
912	/*****************************************************************************/
913
914	#if 0
915
916	struct ev_io wio;
917
918	static void
919	sin_cb (struct ev_io *w, int revents)
920	{
921	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
922	}
923
924	static void
925	ocb (struct ev_timer *w, int revents)
926	{
927	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
928	evtimer_stop (w);
929	evtimer_start (w);
930	}
931
932	static void
933	scb (struct ev_signal *w, int revents)
934	{
935	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
936	evio_stop (&wio);
937	evio_start (&wio);
938	}
939
940	static void
941	gcb (struct ev_signal *w, int revents)
942	{
943	fprintf (stderr, "generic %x\n", revents);
944
945	}
946
947	int main (void)
948	{
949	ev_init (0);
950
951	evio_init (&wio, sin_cb, 0, EV_READ);
952	evio_start (&wio);
953
954	struct ev_timer t[10000];
955
956	#if 0
957	int i;
958	for (i = 0; i < 10000; ++i)
959	{	2289	}
960	struct ev_timer *w = t + i;
961	evw_init (w, ocb, i);
962	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
963	evtimer_start (w);
964	if (drand48 () < 0.5)
965	evtimer_stop (w);
966	}
967	#endif
968
969	struct ev_timer t1;
970	evtimer_init (&t1, ocb, 5, 10);
971	evtimer_start (&t1);
972
973	struct ev_signal sig;
974	evsignal_init (&sig, scb, SIGQUIT);
975	evsignal_start (&sig);
976
977	struct ev_check cw;
978	evcheck_init (&cw, gcb);
979	evcheck_start (&cw);
980
981	struct ev_idle iw;
982	evidle_init (&iw, gcb);
983	evidle_start (&iw);
984
985	ev_loop (0);
986
987	return 0;
988	}	2290	}
989		2291
		2292	#ifdef __cplusplus
		2293	}
990	#endif	2294	#endif
991		2295
992
993
994

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