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

Comparing libev/ev.c (file contents):
Revision 1.19 by root, Wed Oct 31 17:55:55 2007 UTC vs.
Revision 1.152 by root, Wed Nov 28 11:15:55 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	#ifndef HAVE_MONOTONIC	121	#include <signal.h>
45	# ifdef CLOCK_MONOTONIC	122
46	# define HAVE_MONOTONIC 1	123	#ifdef EV_H
		124	# include EV_H
		125	#else
		126	# include "ev.h"
		127	#endif
		128
		129	#ifndef _WIN32
		130	# include <sys/time.h>
		131	# include <sys/wait.h>
		132	# include <unistd.h>
		133	#else
		134	# define WIN32_LEAN_AND_MEAN
		135	# include <windows.h>
		136	# ifndef EV_SELECT_IS_WINSOCKET
		137	# define EV_SELECT_IS_WINSOCKET 1
47	# endif	138	# endif
48	#endif	139	#endif
49		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
50	#ifndef HAVE_SELECT	151	#ifndef EV_USE_SELECT
51	# 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
52	#endif	160	# endif
		161	#endif
53		162
54	#ifndef HAVE_EPOLL	163	#ifndef EV_USE_EPOLL
55	# 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
56	#endif	184	# endif
		185	#endif
57		186
58	#ifndef HAVE_REALTIME	187	#ifndef EV_INOTIFY_HASHSIZE
59	# 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
60	#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	/**/
61		220
62	#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) */
63	#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 */
64		224
65	#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
66		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)->priority - EV_MINPRI)
		247
		248	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		249	#define EMPTY2(a,b) /* used to suppress some warnings */
		250
67	typedef struct ev_watcher *W;	251	typedef ev_watcher *W;
68	typedef struct ev_watcher_list *WL;	252	typedef ev_watcher_list *WL;
69	typedef struct ev_watcher_time *WT;	253	typedef ev_watcher_time *WT;
70		254
71	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, size_t size) = realloc;
		287
		288	void
		289	ev_set_allocator (void (cb)(void *ptr, size_t size))
		290	{
		291	alloc = cb;
		292	}
		293
		294	inline_speed void *
		295	ev_realloc (void *ptr, size_t size)
		296	{
		297	ptr = alloc (ptr, size);
		298
		299	if (!ptr && size)
		300	{
		301	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", (long)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	typedef struct
		330	{
		331	#if EV_USE_INOTIFY
		332	WL head;
		333	#endif
		334	} ANFS;
		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
72	ev_tstamp ev_now;	353	ev_tstamp ev_rt_now;
73	int ev_method;	354	#define VAR(name,decl) static decl;
		355	#include "ev_vars.h"
		356	#undef VAR
74		357
75	static int have_monotonic; /* runtime */	358	static int ev_default_loop_ptr;
76		359
77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	360	#endif
78	static void (*method_modify)(int fd, int oev, int nev);
79	static void (*method_poll)(ev_tstamp timeout);
80		361
81	/*****************************************************************************/	362	/*****************************************************************************/
82		363
83	ev_tstamp	364	ev_tstamp
84	ev_time (void)	365	ev_time (void)
85	{	366	{
86	#if HAVE_REALTIME	367	#if EV_USE_REALTIME
87	struct timespec ts;	368	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	369	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	370	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	371	#else
91	struct timeval tv;	372	struct timeval tv;
92	gettimeofday (&tv, 0);	373	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	374	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	375	#endif
95	}	376	}
96		377
97	static ev_tstamp	378	ev_tstamp inline_size
98	get_clock (void)	379	get_clock (void)
99	{	380	{
100	#if HAVE_MONOTONIC	381	#if EV_USE_MONOTONIC
101	if (have_monotonic)	382	if (expect_true (have_monotonic))
102	{	383	{
103	struct timespec ts;	384	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	385	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	386	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	387	}
107	#endif	388	#endif
108		389
109	return ev_time ();	390	return ev_time ();
110	}	391	}
111		392
		393	#if EV_MULTIPLICITY
		394	ev_tstamp
		395	ev_now (EV_P)
		396	{
		397	return ev_rt_now;
		398	}
		399	#endif
		400
		401	#define array_roundsize(type,n) (((n) \| 4) & ~3)
		402
112	#define array_needsize(base,cur,cnt,init) \	403	#define array_needsize(type,base,cur,cnt,init) \
113	if ((cnt) > cur) \	404	if (expect_false ((cnt) > cur)) \
114	{ \	405	{ \
115	int newcnt = cur ? cur << 1 : 16; \	406	int newcnt = cur; \
		407	do \
		408	{ \
		409	newcnt = array_roundsize (type, newcnt << 1); \
		410	} \
		411	while ((cnt) > newcnt); \
		412	\
116	base = realloc (base, sizeof (base) (newcnt)); \	413	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
117	init (base + cur, newcnt - cur); \	414	init (base + cur, newcnt - cur); \
118	cur = newcnt; \	415	cur = newcnt; \
119	}	416	}
		417
		418	#define array_slim(type,stem) \
		419	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		420	{ \
		421	stem ## max = array_roundsize (stem ## cnt >> 1); \
		422	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
		423	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		424	}
		425
		426	#define array_free(stem, idx) \
		427	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
120		428
121	/*****************************************************************************/	429	/*****************************************************************************/
122		430
		431	void noinline
		432	ev_feed_event (EV_P_ void *w, int revents)
		433	{
		434	W w_ = (W)w;
		435
		436	if (expect_false (w_->pending))
		437	{
		438	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		439	return;
		440	}
		441
		442	w_->pending = ++pendingcnt [ABSPRI (w_)];
		443	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		444	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		445	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		446	}
		447
		448	void inline_size
		449	queue_events (EV_P_ W *events, int eventcnt, int type)
		450	{
		451	int i;
		452
		453	for (i = 0; i < eventcnt; ++i)
		454	ev_feed_event (EV_A_ events [i], type);
		455	}
		456
		457	/*****************************************************************************/
		458
		459	void inline_size
		460	anfds_init (ANFD *base, int count)
		461	{
		462	while (count--)
		463	{
		464	base->head = 0;
		465	base->events = EV_NONE;
		466	base->reify = 0;
		467
		468	++base;
		469	}
		470	}
		471
		472	void inline_speed
		473	fd_event (EV_P_ int fd, int revents)
		474	{
		475	ANFD *anfd = anfds + fd;
		476	ev_io *w;
		477
		478	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
		479	{
		480	int ev = w->events & revents;
		481
		482	if (ev)
		483	ev_feed_event (EV_A_ (W)w, ev);
		484	}
		485	}
		486
		487	void
		488	ev_feed_fd_event (EV_P_ int fd, int revents)
		489	{
		490	fd_event (EV_A_ fd, revents);
		491	}
		492
		493	void inline_size
		494	fd_reify (EV_P)
		495	{
		496	int i;
		497
		498	for (i = 0; i < fdchangecnt; ++i)
		499	{
		500	int fd = fdchanges [i];
		501	ANFD *anfd = anfds + fd;
		502	ev_io *w;
		503
		504	int events = 0;
		505
		506	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
		507	events \|= w->events;
		508
		509	#if EV_SELECT_IS_WINSOCKET
		510	if (events)
		511	{
		512	unsigned long argp;
		513	anfd->handle = _get_osfhandle (fd);
		514	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		515	}
		516	#endif
		517
		518	anfd->reify = 0;
		519
		520	backend_modify (EV_A_ fd, anfd->events, events);
		521	anfd->events = events;
		522	}
		523
		524	fdchangecnt = 0;
		525	}
		526
		527	void inline_size
		528	fd_change (EV_P_ int fd)
		529	{
		530	if (expect_false (anfds [fd].reify))
		531	return;
		532
		533	anfds [fd].reify = 1;
		534
		535	++fdchangecnt;
		536	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		537	fdchanges [fdchangecnt - 1] = fd;
		538	}
		539
		540	void inline_speed
		541	fd_kill (EV_P_ int fd)
		542	{
		543	ev_io *w;
		544
		545	while ((w = (ev_io *)anfds [fd].head))
		546	{
		547	ev_io_stop (EV_A_ w);
		548	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		549	}
		550	}
		551
		552	int inline_size
		553	fd_valid (int fd)
		554	{
		555	#ifdef _WIN32
		556	return _get_osfhandle (fd) != -1;
		557	#else
		558	return fcntl (fd, F_GETFD) != -1;
		559	#endif
		560	}
		561
		562	/* called on EBADF to verify fds */
		563	static void noinline
		564	fd_ebadf (EV_P)
		565	{
		566	int fd;
		567
		568	for (fd = 0; fd < anfdmax; ++fd)
		569	if (anfds [fd].events)
		570	if (!fd_valid (fd) == -1 && errno == EBADF)
		571	fd_kill (EV_A_ fd);
		572	}
		573
		574	/* called on ENOMEM in select/poll to kill some fds and retry */
		575	static void noinline
		576	fd_enomem (EV_P)
		577	{
		578	int fd;
		579
		580	for (fd = anfdmax; fd--; )
		581	if (anfds [fd].events)
		582	{
		583	fd_kill (EV_A_ fd);
		584	return;
		585	}
		586	}
		587
		588	/* usually called after fork if backend needs to re-arm all fds from scratch */
		589	static void noinline
		590	fd_rearm_all (EV_P)
		591	{
		592	int fd;
		593
		594	/* this should be highly optimised to not do anything but set a flag */
		595	for (fd = 0; fd < anfdmax; ++fd)
		596	if (anfds [fd].events)
		597	{
		598	anfds [fd].events = 0;
		599	fd_change (EV_A_ fd);
		600	}
		601	}
		602
		603	/*****************************************************************************/
		604
		605	void inline_speed
		606	upheap (WT *heap, int k)
		607	{
		608	WT w = heap [k];
		609
		610	while (k && heap [k >> 1]->at > w->at)
		611	{
		612	heap [k] = heap [k >> 1];
		613	((W)heap [k])->active = k + 1;
		614	k >>= 1;
		615	}
		616
		617	heap [k] = w;
		618	((W)heap [k])->active = k + 1;
		619
		620	}
		621
		622	void inline_speed
		623	downheap (WT *heap, int N, int k)
		624	{
		625	WT w = heap [k];
		626
		627	while (k < (N >> 1))
		628	{
		629	int j = k << 1;
		630
		631	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		632	++j;
		633
		634	if (w->at <= heap [j]->at)
		635	break;
		636
		637	heap [k] = heap [j];
		638	((W)heap [k])->active = k + 1;
		639	k = j;
		640	}
		641
		642	heap [k] = w;
		643	((W)heap [k])->active = k + 1;
		644	}
		645
		646	void inline_size
		647	adjustheap (WT *heap, int N, int k)
		648	{
		649	upheap (heap, k);
		650	downheap (heap, N, k);
		651	}
		652
		653	/*****************************************************************************/
		654
123	typedef struct	655	typedef struct
124	{	656	{
125	struct ev_io *head;	657	WL head;
126	unsigned char wev, rev; /* want, received event set */
127	} ANFD;
128
129	static ANFD *anfds;
130	static int anfdmax;
131
132	static int *fdchanges;
133	static int fdchangemax, fdchangecnt;
134
135	static void
136	anfds_init (ANFD *base, int count)
137	{
138	while (count--)
139	{
140	base->head = 0;
141	base->wev = base->rev = EV_NONE;
142	++base;
143	}
144	}
145
146	typedef struct
147	{
148	W w;
149	int events;
150	} ANPENDING;
151
152	static ANPENDING *pendings;
153	static int pendingmax, pendingcnt;
154
155	static void
156	event (W w, int events)
157	{
158	if (w->active)
159	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;
164	}
165	}
166
167	static void
168	fd_event (int fd, int events)
169	{
170	ANFD *anfd = anfds + fd;
171	struct ev_io *w;
172
173	for (w = anfd->head; w; w = w->next)
174	{
175	int ev = w->events & events;
176
177	if (ev)
178	event ((W)w, ev);
179	}
180	}
181
182	static void
183	queue_events (W *events, int eventcnt, int type)
184	{
185	int i;
186
187	for (i = 0; i < eventcnt; ++i)
188	event (events [i], type);
189	}
190
191	/* called on EBADF to verify fds */
192	static void
193	fd_recheck ()
194	{
195	int fd;
196
197	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
200	while (anfds [fd].head)
201	evio_stop (anfds [fd].head);
202	}
203
204	/*****************************************************************************/
205
206	static struct ev_timer **timers;
207	static int timermax, timercnt;
208
209	static struct ev_periodic **periodics;
210	static int periodicmax, periodiccnt;
211
212	static void
213	upheap (WT *timers, int k)
214	{
215	WT w = timers [k];
216
217	while (k && timers [k >> 1]->at > w->at)
218	{
219	timers [k] = timers [k >> 1];
220	timers [k]->active = k + 1;
221	k >>= 1;
222	}
223
224	timers [k] = w;
225	timers [k]->active = k + 1;
226
227	}
228
229	static void
230	downheap (WT *timers, int N, int k)
231	{
232	WT w = timers [k];
233
234	while (k < (N >> 1))
235	{
236	int j = k << 1;
237
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
239	++j;
240
241	if (w->at <= timers [j]->at)
242	break;
243
244	timers [k] = timers [j];
245	timers [k]->active = k + 1;
246	k = j;
247	}
248
249	timers [k] = w;
250	timers [k]->active = k + 1;
251	}
252
253	/*****************************************************************************/
254
255	typedef struct
256	{
257	struct ev_signal *head;
258	sig_atomic_t gotsig;	658	sig_atomic_t volatile gotsig;
259	} ANSIG;	659	} ANSIG;
260		660
261	static ANSIG *signals;	661	static ANSIG *signals;
262	static int signalmax;	662	static int signalmax;
263		663
264	static int sigpipe [2];	664	static int sigpipe [2];
265	static sig_atomic_t gotsig;	665	static sig_atomic_t volatile gotsig;
266	static struct ev_io sigev;	666	static ev_io sigev;
267		667
268	static void	668	void inline_size
269	signals_init (ANSIG *base, int count)	669	signals_init (ANSIG *base, int count)
270	{	670	{
271	while (count--)	671	while (count--)
272	{	672	{
273	base->head = 0;	673	base->head = 0;
274	base->gotsig = 0;	674	base->gotsig = 0;
		675
275	++base;	676	++base;
276	}	677	}
277	}	678	}
278		679
279	static void	680	static void
280	sighandler (int signum)	681	sighandler (int signum)
281	{	682	{
		683	#if _WIN32
		684	signal (signum, sighandler);
		685	#endif
		686
282	signals [signum - 1].gotsig = 1;	687	signals [signum - 1].gotsig = 1;
283		688
284	if (!gotsig)	689	if (!gotsig)
285	{	690	{
		691	int old_errno = errno;
286	gotsig = 1;	692	gotsig = 1;
287	write (sigpipe [1], &gotsig, 1);	693	write (sigpipe [1], &signum, 1);
		694	errno = old_errno;
288	}	695	}
		696	}
		697
		698	void noinline
		699	ev_feed_signal_event (EV_P_ int signum)
		700	{
		701	WL w;
		702
		703	#if EV_MULTIPLICITY
		704	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		705	#endif
		706
		707	--signum;
		708
		709	if (signum < 0 \|\| signum >= signalmax)
		710	return;
		711
		712	signals [signum].gotsig = 0;
		713
		714	for (w = signals [signum].head; w; w = w->next)
		715	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
289	}	716	}
290		717
291	static void	718	static void
292	sigcb (struct ev_io *iow, int revents)	719	sigcb (EV_P_ ev_io *iow, int revents)
293	{	720	{
294	struct ev_signal *w;
295	int sig;	721	int signum;
296		722
		723	read (sigpipe [0], &revents, 1);
297	gotsig = 0;	724	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299		725
300	for (sig = signalmax; sig--; )	726	for (signum = signalmax; signum--; )
301	if (signals [sig].gotsig)	727	if (signals [signum].gotsig)
		728	ev_feed_signal_event (EV_A_ signum + 1);
		729	}
		730
		731	void inline_size
		732	fd_intern (int fd)
		733	{
		734	#ifdef _WIN32
		735	int arg = 1;
		736	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		737	#else
		738	fcntl (fd, F_SETFD, FD_CLOEXEC);
		739	fcntl (fd, F_SETFL, O_NONBLOCK);
		740	#endif
		741	}
		742
		743	static void noinline
		744	siginit (EV_P)
		745	{
		746	fd_intern (sigpipe [0]);
		747	fd_intern (sigpipe [1]);
		748
		749	ev_io_set (&sigev, sigpipe [0], EV_READ);
		750	ev_io_start (EV_A_ &sigev);
		751	ev_unref (EV_A); /* child watcher should not keep loop alive */
		752	}
		753
		754	/*****************************************************************************/
		755
		756	static ev_child *childs [EV_PID_HASHSIZE];
		757
		758	#ifndef _WIN32
		759
		760	static ev_signal childev;
		761
		762	void inline_speed
		763	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		764	{
		765	ev_child *w;
		766
		767	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)
		768	if (w->pid == pid \|\| !w->pid)
302	{	769	{
303	signals [sig].gotsig = 0;	770	ev_priority (w) = ev_priority (sw); /* need to do it now */
304		771	w->rpid = pid;
305	for (w = signals [sig].head; w; w = w->next)	772	w->rstatus = status;
306	event ((W)w, EV_SIGNAL);	773	ev_feed_event (EV_A_ (W)w, EV_CHILD);
307	}	774	}
308	}	775	}
309		776
		777	#ifndef WCONTINUED
		778	# define WCONTINUED 0
		779	#endif
		780
310	static void	781	static void
311	siginit (void)	782	childcb (EV_P_ ev_signal *sw, int revents)
312	{	783	{
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	784	int pid, status;
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315		785
316	/* rather than sort out wether we really need nb, set it */	786	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	787	if (0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	788	if (!WCONTINUED
		789	\|\| errno != EINVAL
		790	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))
		791	return;
319		792
320	evio_set (&sigev, sigpipe [0], EV_READ);	793	/* make sure we are called again until all childs have been reaped */
321	evio_start (&sigev);	794	/* we need to do it this way so that the callback gets called before we continue */
		795	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		796
		797	child_reap (EV_A_ sw, pid, pid, status);
		798	if (EV_PID_HASHSIZE > 1)
		799	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
322	}	800	}
		801
		802	#endif
323		803
324	/*****************************************************************************/	804	/*****************************************************************************/
325		805
326	static struct ev_idle **idles;	806	#if EV_USE_PORT
327	static int idlemax, idlecnt;	807	# include "ev_port.c"
		808	#endif
		809	#if EV_USE_KQUEUE
		810	# include "ev_kqueue.c"
		811	#endif
		812	#if EV_USE_EPOLL
		813	# include "ev_epoll.c"
		814	#endif
		815	#if EV_USE_POLL
		816	# include "ev_poll.c"
		817	#endif
		818	#if EV_USE_SELECT
		819	# include "ev_select.c"
		820	#endif
328		821
329	static struct ev_check **checks;	822	int
330	static int checkmax, checkcnt;	823	ev_version_major (void)
		824	{
		825	return EV_VERSION_MAJOR;
		826	}
		827
		828	int
		829	ev_version_minor (void)
		830	{
		831	return EV_VERSION_MINOR;
		832	}
		833
		834	/* return true if we are running with elevated privileges and should ignore env variables */
		835	int inline_size
		836	enable_secure (void)
		837	{
		838	#ifdef _WIN32
		839	return 0;
		840	#else
		841	return getuid () != geteuid ()
		842	\|\| getgid () != getegid ();
		843	#endif
		844	}
		845
		846	unsigned int
		847	ev_supported_backends (void)
		848	{
		849	unsigned int flags = 0;
		850
		851	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
		852	if (EV_USE_KQUEUE) flags \|= EVBACKEND_KQUEUE;
		853	if (EV_USE_EPOLL ) flags \|= EVBACKEND_EPOLL;
		854	if (EV_USE_POLL ) flags \|= EVBACKEND_POLL;
		855	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
		856
		857	return flags;
		858	}
		859
		860	unsigned int
		861	ev_recommended_backends (void)
		862	{
		863	unsigned int flags = ev_supported_backends ();
		864
		865	#ifndef __NetBSD__
		866	/* kqueue is borked on everything but netbsd apparently */
		867	/* it usually doesn't work correctly on anything but sockets and pipes */
		868	flags &= ~EVBACKEND_KQUEUE;
		869	#endif
		870	#ifdef __APPLE__
		871	// flags &= ~EVBACKEND_KQUEUE; for documentation
		872	flags &= ~EVBACKEND_POLL;
		873	#endif
		874
		875	return flags;
		876	}
		877
		878	unsigned int
		879	ev_embeddable_backends (void)
		880	{
		881	return EVBACKEND_EPOLL
		882	\| EVBACKEND_KQUEUE
		883	\| EVBACKEND_PORT;
		884	}
		885
		886	unsigned int
		887	ev_backend (EV_P)
		888	{
		889	return backend;
		890	}
		891
		892	static void noinline
		893	loop_init (EV_P_ unsigned int flags)
		894	{
		895	if (!backend)
		896	{
		897	#if EV_USE_MONOTONIC
		898	{
		899	struct timespec ts;
		900	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		901	have_monotonic = 1;
		902	}
		903	#endif
		904
		905	ev_rt_now = ev_time ();
		906	mn_now = get_clock ();
		907	now_floor = mn_now;
		908	rtmn_diff = ev_rt_now - mn_now;
		909
		910	if (!(flags & EVFLAG_NOENV)
		911	&& !enable_secure ()
		912	&& getenv ("LIBEV_FLAGS"))
		913	flags = atoi (getenv ("LIBEV_FLAGS"));
		914
		915	if (!(flags & 0x0000ffffUL))
		916	flags \|= ev_recommended_backends ();
		917
		918	backend = 0;
		919	backend_fd = -1;
		920	#if EV_USE_INOTIFY
		921	fs_fd = -2;
		922	#endif
		923
		924	#if EV_USE_PORT
		925	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		926	#endif
		927	#if EV_USE_KQUEUE
		928	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		929	#endif
		930	#if EV_USE_EPOLL
		931	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		932	#endif
		933	#if EV_USE_POLL
		934	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		935	#endif
		936	#if EV_USE_SELECT
		937	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		938	#endif
		939
		940	ev_init (&sigev, sigcb);
		941	ev_set_priority (&sigev, EV_MAXPRI);
		942	}
		943	}
		944
		945	static void noinline
		946	loop_destroy (EV_P)
		947	{
		948	int i;
		949
		950	#if EV_USE_INOTIFY
		951	if (fs_fd >= 0)
		952	close (fs_fd);
		953	#endif
		954
		955	if (backend_fd >= 0)
		956	close (backend_fd);
		957
		958	#if EV_USE_PORT
		959	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		960	#endif
		961	#if EV_USE_KQUEUE
		962	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		963	#endif
		964	#if EV_USE_EPOLL
		965	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		966	#endif
		967	#if EV_USE_POLL
		968	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		969	#endif
		970	#if EV_USE_SELECT
		971	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		972	#endif
		973
		974	for (i = NUMPRI; i--; )
		975	array_free (pending, [i]);
		976
		977	/* have to use the microsoft-never-gets-it-right macro */
		978	array_free (fdchange, EMPTY0);
		979	array_free (timer, EMPTY0);
		980	#if EV_PERIODIC_ENABLE
		981	array_free (periodic, EMPTY0);
		982	#endif
		983	array_free (idle, EMPTY0);
		984	array_free (prepare, EMPTY0);
		985	array_free (check, EMPTY0);
		986
		987	backend = 0;
		988	}
		989
		990	void inline_size
		991	loop_fork (EV_P)
		992	{
		993	#if EV_USE_PORT
		994	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		995	#endif
		996	#if EV_USE_KQUEUE
		997	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		998	#endif
		999	#if EV_USE_EPOLL
		1000	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1001	#endif
		1002
		1003	if (ev_is_active (&sigev))
		1004	{
		1005	/* default loop */
		1006
		1007	ev_ref (EV_A);
		1008	ev_io_stop (EV_A_ &sigev);
		1009	close (sigpipe [0]);
		1010	close (sigpipe [1]);
		1011
		1012	while (pipe (sigpipe))
		1013	syserr ("(libev) error creating pipe");
		1014
		1015	siginit (EV_A);
		1016	}
		1017
		1018	postfork = 0;
		1019	}
		1020
		1021	#if EV_MULTIPLICITY
		1022	struct ev_loop *
		1023	ev_loop_new (unsigned int flags)
		1024	{
		1025	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		1026
		1027	memset (loop, 0, sizeof (struct ev_loop));
		1028
		1029	loop_init (EV_A_ flags);
		1030
		1031	if (ev_backend (EV_A))
		1032	return loop;
		1033
		1034	return 0;
		1035	}
		1036
		1037	void
		1038	ev_loop_destroy (EV_P)
		1039	{
		1040	loop_destroy (EV_A);
		1041	ev_free (loop);
		1042	}
		1043
		1044	void
		1045	ev_loop_fork (EV_P)
		1046	{
		1047	postfork = 1;
		1048	}
		1049
		1050	#endif
		1051
		1052	#if EV_MULTIPLICITY
		1053	struct ev_loop *
		1054	ev_default_loop_init (unsigned int flags)
		1055	#else
		1056	int
		1057	ev_default_loop (unsigned int flags)
		1058	#endif
		1059	{
		1060	if (sigpipe [0] == sigpipe [1])
		1061	if (pipe (sigpipe))
		1062	return 0;
		1063
		1064	if (!ev_default_loop_ptr)
		1065	{
		1066	#if EV_MULTIPLICITY
		1067	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1068	#else
		1069	ev_default_loop_ptr = 1;
		1070	#endif
		1071
		1072	loop_init (EV_A_ flags);
		1073
		1074	if (ev_backend (EV_A))
		1075	{
		1076	siginit (EV_A);
		1077
		1078	#ifndef _WIN32
		1079	ev_signal_init (&childev, childcb, SIGCHLD);
		1080	ev_set_priority (&childev, EV_MAXPRI);
		1081	ev_signal_start (EV_A_ &childev);
		1082	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1083	#endif
		1084	}
		1085	else
		1086	ev_default_loop_ptr = 0;
		1087	}
		1088
		1089	return ev_default_loop_ptr;
		1090	}
		1091
		1092	void
		1093	ev_default_destroy (void)
		1094	{
		1095	#if EV_MULTIPLICITY
		1096	struct ev_loop *loop = ev_default_loop_ptr;
		1097	#endif
		1098
		1099	#ifndef _WIN32
		1100	ev_ref (EV_A); /* child watcher */
		1101	ev_signal_stop (EV_A_ &childev);
		1102	#endif
		1103
		1104	ev_ref (EV_A); /* signal watcher */
		1105	ev_io_stop (EV_A_ &sigev);
		1106
		1107	close (sigpipe [0]); sigpipe [0] = 0;
		1108	close (sigpipe [1]); sigpipe [1] = 0;
		1109
		1110	loop_destroy (EV_A);
		1111	}
		1112
		1113	void
		1114	ev_default_fork (void)
		1115	{
		1116	#if EV_MULTIPLICITY
		1117	struct ev_loop *loop = ev_default_loop_ptr;
		1118	#endif
		1119
		1120	if (backend)
		1121	postfork = 1;
		1122	}
331		1123
332	/*****************************************************************************/	1124	/*****************************************************************************/
333		1125
334	#if HAVE_EPOLL	1126	int inline_size
335	# include "ev_epoll.c"	1127	any_pending (EV_P)
336	#endif
337	#if HAVE_SELECT
338	# include "ev_select.c"
339	#endif
340
341	int ev_init (int flags)
342	{	1128	{
343	#if HAVE_MONOTONIC	1129	int pri;
344	{
345	struct timespec ts;
346	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
347	have_monotonic = 1;
348	}
349	#endif
350		1130
351	ev_now = ev_time ();	1131	for (pri = NUMPRI; pri--; )
352	now = get_clock ();	1132	if (pendingcnt [pri])
353	diff = ev_now - now;	1133	return 1;
354		1134
355	if (pipe (sigpipe))
356	return 0;	1135	return 0;
357
358	ev_method = EVMETHOD_NONE;
359	#if HAVE_EPOLL
360	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
361	#endif
362	#if HAVE_SELECT
363	if (ev_method == EVMETHOD_NONE) select_init (flags);
364	#endif
365
366	if (ev_method)
367	{
368	evw_init (&sigev, sigcb);
369	siginit ();
370	}
371
372	return ev_method;
373	}	1136	}
374		1137
375	/*****************************************************************************/	1138	void inline_speed
376		1139	call_pending (EV_P)
377	void ev_prefork (void)
378	{	1140	{
379	/* nop */
380	}
381
382	void ev_postfork_parent (void)
383	{
384	/* nop */
385	}
386
387	void ev_postfork_child (void)
388	{
389	#if HAVE_EPOLL
390	if (ev_method == EVMETHOD_EPOLL)
391	epoll_postfork_child ();
392	#endif
393
394	evio_stop (&sigev);
395	close (sigpipe [0]);
396	close (sigpipe [1]);
397	pipe (sigpipe);
398	siginit ();
399	}
400
401	/*****************************************************************************/
402
403	static void
404	fd_reify (void)
405	{
406	int i;	1141	int pri;
407		1142
408	for (i = 0; i < fdchangecnt; ++i)	1143	for (pri = NUMPRI; pri--; )
		1144	while (pendingcnt [pri])
409	{	1145	{
410	int fd = fdchanges [i];	1146	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
411	ANFD *anfd = anfds + fd;
412	struct ev_io *w;
413		1147
414	int wev = 0;	1148	if (expect_true (p->w))
415
416	for (w = anfd->head; w; w = w->next)
417	wev \|= w->events;
418
419	if (anfd->wev != wev)
420	{	1149	{
421	method_modify (fd, anfd->wev, wev);	1150	/assert (("non-pending watcher on pending list", p->w->pending));/
422	anfd->wev = wev;
423	}
424	}
425		1151
426	fdchangecnt = 0;
427	}
428
429	static void
430	call_pending ()
431	{
432	while (pendingcnt)
433	{
434	ANPENDING *p = pendings + --pendingcnt;
435
436	if (p->w)
437	{
438	p->w->pending = 0;	1152	p->w->pending = 0;
439	p->w->cb (p->w, p->events);	1153	EV_CB_INVOKE (p->w, p->events);
440	}	1154	}
441	}	1155	}
442	}	1156	}
443		1157
444	static void	1158	void inline_size
445	timers_reify ()	1159	timers_reify (EV_P)
446	{	1160	{
447	while (timercnt && timers [0]->at <= now)	1161	while (timercnt && ((WT)timers [0])->at <= mn_now)
448	{	1162	{
449	struct ev_timer *w = timers [0];	1163	ev_timer *w = timers [0];
450		1164
451	event ((W)w, EV_TIMEOUT);	1165	/assert (("inactive timer on timer heap detected", ev_is_active (w)));/
452		1166
453	/* first reschedule or stop timer */	1167	/* first reschedule or stop timer */
454	if (w->repeat)	1168	if (w->repeat)
455	{	1169	{
		1170	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1171
456	w->at = now + w->repeat;	1172	((WT)w)->at += w->repeat;
457	assert (("timer timeout in the past, negative repeat?", w->at > now));	1173	if (((WT)w)->at < mn_now)
		1174	((WT)w)->at = mn_now;
		1175
458	downheap ((WT *)timers, timercnt, 0);	1176	downheap ((WT *)timers, timercnt, 0);
459	}	1177	}
460	else	1178	else
461	evtimer_stop (w); /* nonrepeating: stop timer */	1179	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
462	}
463	}
464		1180
465	static void	1181	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1182	}
		1183	}
		1184
		1185	#if EV_PERIODIC_ENABLE
		1186	void inline_size
466	periodics_reify ()	1187	periodics_reify (EV_P)
467	{	1188	{
468	while (periodiccnt && periodics [0]->at <= ev_now)	1189	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
469	{	1190	{
470	struct ev_periodic *w = periodics [0];	1191	ev_periodic *w = periodics [0];
		1192
		1193	/assert (("inactive timer on periodic heap detected", ev_is_active (w)));/
471		1194
472	/* first reschedule or stop timer */	1195	/* first reschedule or stop timer */
473	if (w->interval)	1196	if (w->reschedule_cb)
474	{	1197	{
		1198	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1199	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1200	downheap ((WT *)periodics, periodiccnt, 0);
		1201	}
		1202	else if (w->interval)
		1203	{
475	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1204	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
476	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1205	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
477	downheap ((WT *)periodics, periodiccnt, 0);	1206	downheap ((WT *)periodics, periodiccnt, 0);
478	}	1207	}
479	else	1208	else
480	evperiodic_stop (w); /* nonrepeating: stop timer */	1209	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
481		1210
482	event ((W)w, EV_TIMEOUT);	1211	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
483	}	1212	}
484	}	1213	}
485		1214
486	static void	1215	static void noinline
487	periodics_reschedule (ev_tstamp diff)	1216	periodics_reschedule (EV_P)
488	{	1217	{
489	int i;	1218	int i;
490		1219
491	/* adjust periodics after time jump */	1220	/* adjust periodics after time jump */
492	for (i = 0; i < periodiccnt; ++i)	1221	for (i = 0; i < periodiccnt; ++i)
493	{	1222	{
494	struct ev_periodic *w = periodics [i];	1223	ev_periodic *w = periodics [i];
495		1224
		1225	if (w->reschedule_cb)
		1226	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
496	if (w->interval)	1227	else if (w->interval)
		1228	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1229	}
		1230
		1231	/* now rebuild the heap */
		1232	for (i = periodiccnt >> 1; i--; )
		1233	downheap ((WT *)periodics, periodiccnt, i);
		1234	}
		1235	#endif
		1236
		1237	int inline_size
		1238	time_update_monotonic (EV_P)
		1239	{
		1240	mn_now = get_clock ();
		1241
		1242	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1243	{
		1244	ev_rt_now = rtmn_diff + mn_now;
		1245	return 0;
		1246	}
		1247	else
		1248	{
		1249	now_floor = mn_now;
		1250	ev_rt_now = ev_time ();
		1251	return 1;
		1252	}
		1253	}
		1254
		1255	void inline_size
		1256	time_update (EV_P)
		1257	{
		1258	int i;
		1259
		1260	#if EV_USE_MONOTONIC
		1261	if (expect_true (have_monotonic))
		1262	{
		1263	if (time_update_monotonic (EV_A))
497	{	1264	{
498	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1265	ev_tstamp odiff = rtmn_diff;
499		1266
500	if (fabs (diff) >= 1e-4)	1267	/* loop a few times, before making important decisions.
		1268	* on the choice of "4": one iteration isn't enough,
		1269	* in case we get preempted during the calls to
		1270	* ev_time and get_clock. a second call is almost guarenteed
		1271	* to succeed in that case, though. and looping a few more times
		1272	* doesn't hurt either as we only do this on time-jumps or
		1273	* in the unlikely event of getting preempted here.
		1274	*/
		1275	for (i = 4; --i; )
501	{	1276	{
502	evperiodic_stop (w);	1277	rtmn_diff = ev_rt_now - mn_now;
503	evperiodic_start (w);
504		1278
505	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1279	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1280	return; /* all is well */
		1281
		1282	ev_rt_now = ev_time ();
		1283	mn_now = get_clock ();
		1284	now_floor = mn_now;
506	}	1285	}
		1286
		1287	# if EV_PERIODIC_ENABLE
		1288	periodics_reschedule (EV_A);
		1289	# endif
		1290	/* no timer adjustment, as the monotonic clock doesn't jump */
		1291	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
507	}	1292	}
508	}	1293	}
509	}	1294	else
510		1295	#endif
511	static void	1296	{
512	time_update ()
513	{
514	int i;
515
516	ev_now = ev_time ();	1297	ev_rt_now = ev_time ();
517		1298
518	if (have_monotonic)	1299	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
519	{
520	ev_tstamp odiff = diff;
521
522	for (i = 4; --i; ) /* loop a few times, before making important decisions */
523	{	1300	{
524	now = get_clock ();	1301	#if EV_PERIODIC_ENABLE
525	diff = ev_now - now;
526
527	if (fabs (odiff - diff) < MIN_TIMEJUMP)
528	return; /* all is well */
529
530	ev_now = ev_time ();
531	}
532
533	periodics_reschedule (diff - odiff);
534	/* no timer adjustment, as the monotonic clock doesn't jump */
535	}
536	else
537	{
538	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
539	{
540	periodics_reschedule (ev_now - now);	1302	periodics_reschedule (EV_A);
		1303	#endif
541		1304
542	/* adjust timers. this is easy, as the offset is the same for all */	1305	/* adjust timers. this is easy, as the offset is the same for all */
543	for (i = 0; i < timercnt; ++i)	1306	for (i = 0; i < timercnt; ++i)
544	timers [i]->at += diff;	1307	((WT)timers [i])->at += ev_rt_now - mn_now;
545	}	1308	}
546		1309
547	now = ev_now;	1310	mn_now = ev_rt_now;
548	}
549	}
550
551	int ev_loop_done;
552
553	void ev_loop (int flags)
554	{
555	double block;
556	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
557
558	if (checkcnt)
559	{	1311	}
560	queue_events ((W *)checks, checkcnt, EV_CHECK);	1312	}
		1313
		1314	void
		1315	ev_ref (EV_P)
		1316	{
		1317	++activecnt;
		1318	}
		1319
		1320	void
		1321	ev_unref (EV_P)
		1322	{
		1323	--activecnt;
		1324	}
		1325
		1326	static int loop_done;
		1327
		1328	void
		1329	ev_loop (EV_P_ int flags)
		1330	{
		1331	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)
		1332	? EVUNLOOP_ONE
		1333	: EVUNLOOP_CANCEL;
		1334
		1335	while (activecnt)
		1336	{
		1337	/* we might have forked, so reify kernel state if necessary */
		1338	#if EV_FORK_ENABLE
		1339	if (expect_false (postfork))
		1340	if (forkcnt)
		1341	{
		1342	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1343	call_pending (EV_A);
		1344	}
		1345	#endif
		1346
		1347	/* queue check watchers (and execute them) */
		1348	if (expect_false (preparecnt))
		1349	{
		1350	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
561	call_pending ();	1351	call_pending (EV_A);
562	}	1352	}
563		1353
564	do	1354	/* we might have forked, so reify kernel state if necessary */
565	{	1355	if (expect_false (postfork))
		1356	loop_fork (EV_A);
		1357
566	/* update fd-related kernel structures */	1358	/* update fd-related kernel structures */
567	fd_reify ();	1359	fd_reify (EV_A);
568		1360
569	/* calculate blocking time */	1361	/* calculate blocking time */
		1362	{
		1363	double block;
570		1364
571	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */
572	ev_now = ev_time ();
573
574	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1365	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
575	block = 0.;	1366	block = 0.; /* do not block at all */
576	else	1367	else
577	{	1368	{
		1369	/* update time to cancel out callback processing overhead */
		1370	#if EV_USE_MONOTONIC
		1371	if (expect_true (have_monotonic))
		1372	time_update_monotonic (EV_A);
		1373	else
		1374	#endif
		1375	{
		1376	ev_rt_now = ev_time ();
		1377	mn_now = ev_rt_now;
		1378	}
		1379
578	block = MAX_BLOCKTIME;	1380	block = MAX_BLOCKTIME;
579		1381
580	if (timercnt)	1382	if (timercnt)
581	{	1383	{
582	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1384	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
583	if (block > to) block = to;	1385	if (block > to) block = to;
584	}	1386	}
585		1387
		1388	#if EV_PERIODIC_ENABLE
586	if (periodiccnt)	1389	if (periodiccnt)
587	{	1390	{
588	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1391	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
589	if (block > to) block = to;	1392	if (block > to) block = to;
590	}	1393	}
		1394	#endif
591		1395
592	if (block < 0.) block = 0.;	1396	if (expect_false (block < 0.)) block = 0.;
593	}	1397	}
594		1398
595	method_poll (block);	1399	backend_poll (EV_A_ block);
		1400	}
596		1401
597	/* update ev_now, do magic */	1402	/* update ev_rt_now, do magic */
598	time_update ();	1403	time_update (EV_A);
599		1404
600	/* queue pending timers and reschedule them */	1405	/* queue pending timers and reschedule them */
		1406	timers_reify (EV_A); /* relative timers called last */
		1407	#if EV_PERIODIC_ENABLE
601	periodics_reify (); /* absolute timers first */	1408	periodics_reify (EV_A); /* absolute timers called first */
602	timers_reify (); /* relative timers second */	1409	#endif
603		1410
604	/* queue idle watchers unless io or timers are pending */	1411	/* queue idle watchers unless other events are pending */
605	if (!pendingcnt)	1412	if (idlecnt && !any_pending (EV_A))
606	queue_events ((W *)idles, idlecnt, EV_IDLE);	1413	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
607		1414
608	/* queue check and possibly idle watchers */	1415	/* queue check watchers, to be executed first */
		1416	if (expect_false (checkcnt))
609	queue_events ((W *)checks, checkcnt, EV_CHECK);	1417	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
610		1418
611	call_pending ();	1419	call_pending (EV_A);
612	}
613	while (!ev_loop_done);
614		1420
615	if (ev_loop_done != 2)	1421	if (expect_false (loop_done))
		1422	break;
		1423	}
		1424
		1425	if (loop_done == EVUNLOOP_ONE)
		1426	loop_done = EVUNLOOP_CANCEL;
		1427	}
		1428
		1429	void
		1430	ev_unloop (EV_P_ int how)
		1431	{
616	ev_loop_done = 0;	1432	loop_done = how;
617	}	1433	}
618		1434
619	/*****************************************************************************/	1435	/*****************************************************************************/
620		1436
621	static void	1437	void inline_size
622	wlist_add (WL *head, WL elem)	1438	wlist_add (WL *head, WL elem)
623	{	1439	{
624	elem->next = *head;	1440	elem->next = *head;
625	*head = elem;	1441	*head = elem;
626	}	1442	}
627		1443
628	static void	1444	void inline_size
629	wlist_del (WL *head, WL elem)	1445	wlist_del (WL *head, WL elem)
630	{	1446	{
631	while (*head)	1447	while (*head)
632	{	1448	{
633	if (*head == elem)	1449	if (*head == elem)
…		…
638		1454
639	head = &(*head)->next;	1455	head = &(*head)->next;
640	}	1456	}
641	}	1457	}
642		1458
643	static void	1459	void inline_speed
644	ev_clear (W w)	1460	ev_clear_pending (EV_P_ W w)
645	{	1461	{
646	if (w->pending)	1462	if (w->pending)
647	{	1463	{
648	pendings [w->pending - 1].w = 0;	1464	pendings [ABSPRI (w)][w->pending - 1].w = 0;
649	w->pending = 0;	1465	w->pending = 0;
650	}	1466	}
651	}	1467	}
652		1468
653	static void	1469	void inline_speed
654	ev_start (W w, int active)	1470	ev_start (EV_P_ W w, int active)
655	{	1471	{
		1472	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1473	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1474
656	w->active = active;	1475	w->active = active;
		1476	ev_ref (EV_A);
657	}	1477	}
658		1478
659	static void	1479	void inline_size
660	ev_stop (W w)	1480	ev_stop (EV_P_ W w)
661	{	1481	{
		1482	ev_unref (EV_A);
662	w->active = 0;	1483	w->active = 0;
663	}	1484	}
664		1485
665	/*****************************************************************************/	1486	/*****************************************************************************/
666		1487
667	void	1488	void
668	evio_start (struct ev_io *w)	1489	ev_io_start (EV_P_ ev_io *w)
669	{	1490	{
670	if (ev_is_active (w))
671	return;
672
673	int fd = w->fd;	1491	int fd = w->fd;
674		1492
		1493	if (expect_false (ev_is_active (w)))
		1494	return;
		1495
		1496	assert (("ev_io_start called with negative fd", fd >= 0));
		1497
675	ev_start ((W)w, 1);	1498	ev_start (EV_A_ (W)w, 1);
676	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1499	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
677	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1500	wlist_add ((WL *)&anfds[fd].head, (WL)w);
678		1501
679	++fdchangecnt;	1502	fd_change (EV_A_ fd);
680	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
681	fdchanges [fdchangecnt - 1] = fd;
682	}	1503	}
683		1504
684	void	1505	void
685	evio_stop (struct ev_io *w)	1506	ev_io_stop (EV_P_ ev_io *w)
686	{	1507	{
687	ev_clear ((W)w);	1508	ev_clear_pending (EV_A_ (W)w);
688	if (!ev_is_active (w))	1509	if (expect_false (!ev_is_active (w)))
689	return;	1510	return;
		1511
		1512	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
690		1513
691	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1514	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
692	ev_stop ((W)w);	1515	ev_stop (EV_A_ (W)w);
693		1516
694	++fdchangecnt;	1517	fd_change (EV_A_ w->fd);
695	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
696	fdchanges [fdchangecnt - 1] = w->fd;
697	}	1518	}
698		1519
699	void	1520	void
700	evtimer_start (struct ev_timer *w)	1521	ev_timer_start (EV_P_ ev_timer *w)
701	{	1522	{
702	if (ev_is_active (w))	1523	if (expect_false (ev_is_active (w)))
703	return;	1524	return;
704		1525
705	w->at += now;	1526	((WT)w)->at += mn_now;
706		1527
707	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1528	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
708		1529
709	ev_start ((W)w, ++timercnt);	1530	ev_start (EV_A_ (W)w, ++timercnt);
710	array_needsize (timers, timermax, timercnt, );	1531	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
711	timers [timercnt - 1] = w;	1532	timers [timercnt - 1] = w;
712	upheap ((WT *)timers, timercnt - 1);	1533	upheap ((WT *)timers, timercnt - 1);
713	}
714		1534
		1535	/assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));/
		1536	}
		1537
715	void	1538	void
716	evtimer_stop (struct ev_timer *w)	1539	ev_timer_stop (EV_P_ ev_timer *w)
717	{	1540	{
718	ev_clear ((W)w);	1541	ev_clear_pending (EV_A_ (W)w);
719	if (!ev_is_active (w))	1542	if (expect_false (!ev_is_active (w)))
720	return;	1543	return;
721		1544
722	if (w->active < timercnt--)	1545	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1546
		1547	{
		1548	int active = ((W)w)->active;
		1549
		1550	if (expect_true (--active < --timercnt))
723	{	1551	{
724	timers [w->active - 1] = timers [timercnt];	1552	timers [active] = timers [timercnt];
725	downheap ((WT *)timers, timercnt, w->active - 1);	1553	adjustheap ((WT *)timers, timercnt, active);
726	}	1554	}
		1555	}
727		1556
728	w->at = w->repeat;	1557	((WT)w)->at -= mn_now;
729		1558
730	ev_stop ((W)w);	1559	ev_stop (EV_A_ (W)w);
731	}	1560	}
732		1561
733	void	1562	void
734	evtimer_again (struct ev_timer *w)	1563	ev_timer_again (EV_P_ ev_timer *w)
735	{	1564	{
736	if (ev_is_active (w))	1565	if (ev_is_active (w))
737	{	1566	{
738	if (w->repeat)	1567	if (w->repeat)
739	{	1568	{
740	w->at = now + w->repeat;	1569	((WT)w)->at = mn_now + w->repeat;
741	downheap ((WT *)timers, timercnt, w->active - 1);	1570	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
742	}	1571	}
743	else	1572	else
744	evtimer_stop (w);	1573	ev_timer_stop (EV_A_ w);
745	}	1574	}
746	else if (w->repeat)	1575	else if (w->repeat)
		1576	{
		1577	w->at = w->repeat;
747	evtimer_start (w);	1578	ev_timer_start (EV_A_ w);
		1579	}
748	}	1580	}
749		1581
		1582	#if EV_PERIODIC_ENABLE
750	void	1583	void
751	evperiodic_start (struct ev_periodic *w)	1584	ev_periodic_start (EV_P_ ev_periodic *w)
752	{	1585	{
753	if (ev_is_active (w))	1586	if (expect_false (ev_is_active (w)))
754	return;	1587	return;
755		1588
756	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1589	if (w->reschedule_cb)
757		1590	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1591	else if (w->interval)
		1592	{
		1593	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
758	/* this formula differs from the one in periodic_reify because we do not always round up */	1594	/* this formula differs from the one in periodic_reify because we do not always round up */
759	if (w->interval)
760	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1595	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1596	}
761		1597
762	ev_start ((W)w, ++periodiccnt);	1598	ev_start (EV_A_ (W)w, ++periodiccnt);
763	array_needsize (periodics, periodicmax, periodiccnt, );	1599	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
764	periodics [periodiccnt - 1] = w;	1600	periodics [periodiccnt - 1] = w;
765	upheap ((WT *)periodics, periodiccnt - 1);	1601	upheap ((WT *)periodics, periodiccnt - 1);
766	}
767		1602
		1603	/assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));/
		1604	}
		1605
768	void	1606	void
769	evperiodic_stop (struct ev_periodic *w)	1607	ev_periodic_stop (EV_P_ ev_periodic *w)
770	{	1608	{
771	ev_clear ((W)w);	1609	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1610	if (expect_false (!ev_is_active (w)))
773	return;	1611	return;
774		1612
775	if (w->active < periodiccnt--)	1613	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1614
		1615	{
		1616	int active = ((W)w)->active;
		1617
		1618	if (expect_true (--active < --periodiccnt))
776	{	1619	{
777	periodics [w->active - 1] = periodics [periodiccnt];	1620	periodics [active] = periodics [periodiccnt];
778	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1621	adjustheap ((WT *)periodics, periodiccnt, active);
779	}	1622	}
		1623	}
780		1624
781	ev_stop ((W)w);	1625	ev_stop (EV_A_ (W)w);
782	}	1626	}
783		1627
784	void	1628	void
		1629	ev_periodic_again (EV_P_ ev_periodic *w)
		1630	{
		1631	/* TODO: use adjustheap and recalculation */
		1632	ev_periodic_stop (EV_A_ w);
		1633	ev_periodic_start (EV_A_ w);
		1634	}
		1635	#endif
		1636
		1637	#ifndef SA_RESTART
		1638	# define SA_RESTART 0
		1639	#endif
		1640
		1641	void
785	evsignal_start (struct ev_signal *w)	1642	ev_signal_start (EV_P_ ev_signal *w)
786	{	1643	{
		1644	#if EV_MULTIPLICITY
		1645	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1646	#endif
787	if (ev_is_active (w))	1647	if (expect_false (ev_is_active (w)))
788	return;	1648	return;
789		1649
		1650	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1651
790	ev_start ((W)w, 1);	1652	ev_start (EV_A_ (W)w, 1);
791	array_needsize (signals, signalmax, w->signum, signals_init);	1653	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
792	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1654	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
793		1655
794	if (!w->next)	1656	if (!((WL)w)->next)
795	{	1657	{
		1658	#if _WIN32
		1659	signal (w->signum, sighandler);
		1660	#else
796	struct sigaction sa;	1661	struct sigaction sa;
797	sa.sa_handler = sighandler;	1662	sa.sa_handler = sighandler;
798	sigfillset (&sa.sa_mask);	1663	sigfillset (&sa.sa_mask);
799	sa.sa_flags = 0;	1664	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
800	sigaction (w->signum, &sa, 0);	1665	sigaction (w->signum, &sa, 0);
		1666	#endif
801	}	1667	}
802	}	1668	}
803		1669
804	void	1670	void
805	evsignal_stop (struct ev_signal *w)	1671	ev_signal_stop (EV_P_ ev_signal *w)
806	{	1672	{
807	ev_clear ((W)w);	1673	ev_clear_pending (EV_A_ (W)w);
808	if (!ev_is_active (w))	1674	if (expect_false (!ev_is_active (w)))
809	return;	1675	return;
810		1676
811	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1677	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
812	ev_stop ((W)w);	1678	ev_stop (EV_A_ (W)w);
813		1679
814	if (!signals [w->signum - 1].head)	1680	if (!signals [w->signum - 1].head)
815	signal (w->signum, SIG_DFL);	1681	signal (w->signum, SIG_DFL);
816	}	1682	}
817		1683
818	void evidle_start (struct ev_idle *w)	1684	void
		1685	ev_child_start (EV_P_ ev_child *w)
819	{	1686	{
		1687	#if EV_MULTIPLICITY
		1688	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1689	#endif
820	if (ev_is_active (w))	1690	if (expect_false (ev_is_active (w)))
821	return;	1691	return;
822		1692
		1693	ev_start (EV_A_ (W)w, 1);
		1694	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1695	}
		1696
		1697	void
		1698	ev_child_stop (EV_P_ ev_child *w)
		1699	{
		1700	ev_clear_pending (EV_A_ (W)w);
		1701	if (expect_false (!ev_is_active (w)))
		1702	return;
		1703
		1704	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1705	ev_stop (EV_A_ (W)w);
		1706	}
		1707
		1708	#if EV_STAT_ENABLE
		1709
		1710	# ifdef _WIN32
		1711	# undef lstat
		1712	# define lstat(a,b) _stati64 (a,b)
		1713	# endif
		1714
		1715	#define DEF_STAT_INTERVAL 5.0074891
		1716	#define MIN_STAT_INTERVAL 0.1074891
		1717
		1718	void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1719
		1720	#if EV_USE_INOTIFY
		1721	# define EV_INOTIFY_BUFSIZE ((PATH_MAX + sizeof (struct inotify_event)) + 2048)
		1722
		1723	static void noinline
		1724	infy_add (EV_P_ ev_stat *w)
		1725	{
		1726	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);
		1727
		1728	if (w->wd < 0)
		1729	{
		1730	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1731
		1732	/* monitor some parent directory for speedup hints */
		1733	if (errno == ENOENT \|\| errno == EACCES)
		1734	{
		1735	char path [PATH_MAX];
		1736	strcpy (path, w->path);
		1737
		1738	do
		1739	{
		1740	int mask = IN_MASK_ADD \| IN_DELETE_SELF \| IN_MOVE_SELF
		1741	\| (errno == EACCES ? IN_ATTRIB : IN_CREATE \| IN_MOVED_TO);
		1742
		1743	char *pend = strrchr (path, '/');
		1744
		1745	if (!pend)
		1746	break; /* whoops, no '/', complain to your admin */
		1747
		1748	*pend = 0;
		1749	w->wd = inotify_add_watch (fs_fd, path, IN_DELETE_SELF \| IN_CREATE \| IN_MOVED_TO \| IN_MASK_ADD);
		1750	}
		1751	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
		1752	}
		1753	}
		1754	else
		1755	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1756
		1757	if (w->wd >= 0)
		1758	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1759	}
		1760
		1761	static void noinline
		1762	infy_del (EV_P_ ev_stat *w)
		1763	{
		1764	WL w_;
		1765	int slot;
		1766	int wd = w->wd;
		1767
		1768	if (wd < 0)
		1769	return;
		1770
		1771	w->wd = -2;
		1772	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1773	wlist_del (&fs_hash [slot].head, (WL)w);
		1774
		1775	/* remove this watcher, if others are watching it, they will rearm */
		1776	inotify_rm_watch (fs_fd, wd);
		1777	}
		1778
		1779	static void noinline
		1780	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1781	{
		1782	if (slot < 0)
		1783	/* overflow, need to check for all hahs slots */
		1784	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1785	infy_wd (EV_A_ slot, wd, ev);
		1786	else
		1787	{
		1788	WL w_;
		1789
		1790	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1791	{
		1792	ev_stat w = (ev_stat )w_;
		1793	w_ = w_->next; /* lets us remove this watcher and all before it */
		1794
		1795	if (w->wd == wd \|\| wd == -1)
		1796	{
		1797	if (ev->mask & (IN_IGNORED \| IN_UNMOUNT \| IN_DELETE_SELF))
		1798	{
		1799	w->wd = -1;
		1800	infy_add (EV_A_ w); /* re-add, no matter what */
		1801	}
		1802
		1803	stat_timer_cb (EV_P_ &w->timer, 0);
		1804	}
		1805	}
		1806	}
		1807	}
		1808
		1809	static void
		1810	infy_cb (EV_P_ ev_io *w, int revents)
		1811	{
		1812	char buf [EV_INOTIFY_BUFSIZE];
		1813	struct inotify_event ev = (struct inotify_event )buf;
		1814	int ofs;
		1815	int len = read (fs_fd, buf, sizeof (buf));
		1816
		1817	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1818	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1819	}
		1820
		1821	void inline_size
		1822	infy_init (EV_P)
		1823	{
		1824	if (fs_fd != -2)
		1825	return;
		1826
		1827	fs_fd = inotify_init ();
		1828
		1829	if (fs_fd >= 0)
		1830	{
		1831	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1832	ev_set_priority (&fs_w, EV_MAXPRI);
		1833	ev_io_start (EV_A_ &fs_w);
		1834	}
		1835	}
		1836
		1837	#endif
		1838
		1839	void
		1840	ev_stat_stat (EV_P_ ev_stat *w)
		1841	{
		1842	if (lstat (w->path, &w->attr) < 0)
		1843	w->attr.st_nlink = 0;
		1844	else if (!w->attr.st_nlink)
		1845	w->attr.st_nlink = 1;
		1846	}
		1847
		1848	void noinline
		1849	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1850	{
		1851	ev_stat w = (ev_stat )(((char *)w_) - offsetof (ev_stat, timer));
		1852
		1853	/* we copy this here each the time so that */
		1854	/* prev has the old value when the callback gets invoked */
		1855	w->prev = w->attr;
		1856	ev_stat_stat (EV_A_ w);
		1857
		1858	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
		1859	{
		1860	#if EV_USE_INOTIFY
		1861	infy_del (EV_A_ w);
		1862	infy_add (EV_A_ w);
		1863	ev_stat_stat (EV_A_ w); /* avoid race... */
		1864	#endif
		1865
		1866	ev_feed_event (EV_A_ w, EV_STAT);
		1867	}
		1868	}
		1869
		1870	void
		1871	ev_stat_start (EV_P_ ev_stat *w)
		1872	{
		1873	if (expect_false (ev_is_active (w)))
		1874	return;
		1875
		1876	/* since we use memcmp, we need to clear any padding data etc. */
		1877	memset (&w->prev, 0, sizeof (ev_statdata));
		1878	memset (&w->attr, 0, sizeof (ev_statdata));
		1879
		1880	ev_stat_stat (EV_A_ w);
		1881
		1882	if (w->interval < MIN_STAT_INTERVAL)
		1883	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		1884
		1885	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		1886	ev_set_priority (&w->timer, ev_priority (w));
		1887
		1888	#if EV_USE_INOTIFY
		1889	infy_init (EV_A);
		1890
		1891	if (fs_fd >= 0)
		1892	infy_add (EV_A_ w);
		1893	else
		1894	#endif
		1895	ev_timer_start (EV_A_ &w->timer);
		1896
		1897	ev_start (EV_A_ (W)w, 1);
		1898	}
		1899
		1900	void
		1901	ev_stat_stop (EV_P_ ev_stat *w)
		1902	{
		1903	ev_clear_pending (EV_A_ (W)w);
		1904	if (expect_false (!ev_is_active (w)))
		1905	return;
		1906
		1907	#if EV_USE_INOTIFY
		1908	infy_del (EV_A_ w);
		1909	#endif
		1910	ev_timer_stop (EV_A_ &w->timer);
		1911
		1912	ev_stop (EV_A_ (W)w);
		1913	}
		1914	#endif
		1915
		1916	void
		1917	ev_idle_start (EV_P_ ev_idle *w)
		1918	{
		1919	if (expect_false (ev_is_active (w)))
		1920	return;
		1921
823	ev_start ((W)w, ++idlecnt);	1922	ev_start (EV_A_ (W)w, ++idlecnt);
824	array_needsize (idles, idlemax, idlecnt, );	1923	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
825	idles [idlecnt - 1] = w;	1924	idles [idlecnt - 1] = w;
826	}	1925	}
827		1926
828	void evidle_stop (struct ev_idle *w)	1927	void
		1928	ev_idle_stop (EV_P_ ev_idle *w)
829	{	1929	{
830	ev_clear ((W)w);	1930	ev_clear_pending (EV_A_ (W)w);
831	if (ev_is_active (w))	1931	if (expect_false (!ev_is_active (w)))
832	return;	1932	return;
833		1933
		1934	{
		1935	int active = ((W)w)->active;
834	idles [w->active - 1] = idles [--idlecnt];	1936	idles [active - 1] = idles [--idlecnt];
		1937	((W)idles [active - 1])->active = active;
		1938	}
		1939
835	ev_stop ((W)w);	1940	ev_stop (EV_A_ (W)w);
836	}	1941	}
837		1942
		1943	void
		1944	ev_prepare_start (EV_P_ ev_prepare *w)
		1945	{
		1946	if (expect_false (ev_is_active (w)))
		1947	return;
		1948
		1949	ev_start (EV_A_ (W)w, ++preparecnt);
		1950	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1951	prepares [preparecnt - 1] = w;
		1952	}
		1953
		1954	void
		1955	ev_prepare_stop (EV_P_ ev_prepare *w)
		1956	{
		1957	ev_clear_pending (EV_A_ (W)w);
		1958	if (expect_false (!ev_is_active (w)))
		1959	return;
		1960
		1961	{
		1962	int active = ((W)w)->active;
		1963	prepares [active - 1] = prepares [--preparecnt];
		1964	((W)prepares [active - 1])->active = active;
		1965	}
		1966
		1967	ev_stop (EV_A_ (W)w);
		1968	}
		1969
		1970	void
838	void evcheck_start (struct ev_check *w)	1971	ev_check_start (EV_P_ ev_check *w)
839	{	1972	{
840	if (ev_is_active (w))	1973	if (expect_false (ev_is_active (w)))
841	return;	1974	return;
842		1975
843	ev_start ((W)w, ++checkcnt);	1976	ev_start (EV_A_ (W)w, ++checkcnt);
844	array_needsize (checks, checkmax, checkcnt, );	1977	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
845	checks [checkcnt - 1] = w;	1978	checks [checkcnt - 1] = w;
846	}	1979	}
847		1980
		1981	void
848	void evcheck_stop (struct ev_check *w)	1982	ev_check_stop (EV_P_ ev_check *w)
849	{	1983	{
850	ev_clear ((W)w);	1984	ev_clear_pending (EV_A_ (W)w);
851	if (ev_is_active (w))	1985	if (expect_false (!ev_is_active (w)))
852	return;	1986	return;
853		1987
		1988	{
		1989	int active = ((W)w)->active;
854	checks [w->active - 1] = checks [--checkcnt];	1990	checks [active - 1] = checks [--checkcnt];
		1991	((W)checks [active - 1])->active = active;
		1992	}
		1993
855	ev_stop ((W)w);	1994	ev_stop (EV_A_ (W)w);
856	}	1995	}
		1996
		1997	#if EV_EMBED_ENABLE
		1998	void noinline
		1999	ev_embed_sweep (EV_P_ ev_embed *w)
		2000	{
		2001	ev_loop (w->loop, EVLOOP_NONBLOCK);
		2002	}
		2003
		2004	static void
		2005	embed_cb (EV_P_ ev_io *io, int revents)
		2006	{
		2007	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
		2008
		2009	if (ev_cb (w))
		2010	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2011	else
		2012	ev_embed_sweep (loop, w);
		2013	}
		2014
		2015	void
		2016	ev_embed_start (EV_P_ ev_embed *w)
		2017	{
		2018	if (expect_false (ev_is_active (w)))
		2019	return;
		2020
		2021	{
		2022	struct ev_loop *loop = w->loop;
		2023	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2024	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		2025	}
		2026
		2027	ev_set_priority (&w->io, ev_priority (w));
		2028	ev_io_start (EV_A_ &w->io);
		2029
		2030	ev_start (EV_A_ (W)w, 1);
		2031	}
		2032
		2033	void
		2034	ev_embed_stop (EV_P_ ev_embed *w)
		2035	{
		2036	ev_clear_pending (EV_A_ (W)w);
		2037	if (expect_false (!ev_is_active (w)))
		2038	return;
		2039
		2040	ev_io_stop (EV_A_ &w->io);
		2041
		2042	ev_stop (EV_A_ (W)w);
		2043	}
		2044	#endif
		2045
		2046	#if EV_FORK_ENABLE
		2047	void
		2048	ev_fork_start (EV_P_ ev_fork *w)
		2049	{
		2050	if (expect_false (ev_is_active (w)))
		2051	return;
		2052
		2053	ev_start (EV_A_ (W)w, ++forkcnt);
		2054	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2055	forks [forkcnt - 1] = w;
		2056	}
		2057
		2058	void
		2059	ev_fork_stop (EV_P_ ev_fork *w)
		2060	{
		2061	ev_clear_pending (EV_A_ (W)w);
		2062	if (expect_false (!ev_is_active (w)))
		2063	return;
		2064
		2065	{
		2066	int active = ((W)w)->active;
		2067	forks [active - 1] = forks [--forkcnt];
		2068	((W)forks [active - 1])->active = active;
		2069	}
		2070
		2071	ev_stop (EV_A_ (W)w);
		2072	}
		2073	#endif
857		2074
858	/*****************************************************************************/	2075	/*****************************************************************************/
859		2076
860	struct ev_once	2077	struct ev_once
861	{	2078	{
862	struct ev_io io;	2079	ev_io io;
863	struct ev_timer to;	2080	ev_timer to;
864	void (cb)(int revents, void arg);	2081	void (cb)(int revents, void arg);
865	void *arg;	2082	void *arg;
866	};	2083	};
867		2084
868	static void	2085	static void
869	once_cb (struct ev_once *once, int revents)	2086	once_cb (EV_P_ struct ev_once *once, int revents)
870	{	2087	{
871	void (cb)(int revents, void arg) = once->cb;	2088	void (cb)(int revents, void arg) = once->cb;
872	void *arg = once->arg;	2089	void *arg = once->arg;
873		2090
874	evio_stop (&once->io);	2091	ev_io_stop (EV_A_ &once->io);
875	evtimer_stop (&once->to);	2092	ev_timer_stop (EV_A_ &once->to);
876	free (once);	2093	ev_free (once);
877		2094
878	cb (revents, arg);	2095	cb (revents, arg);
879	}	2096	}
880		2097
881	static void	2098	static void
882	once_cb_io (struct ev_io *w, int revents)	2099	once_cb_io (EV_P_ ev_io *w, int revents)
883	{	2100	{
884	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	2101	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
885	}	2102	}
886		2103
887	static void	2104	static void
888	once_cb_to (struct ev_timer *w, int revents)	2105	once_cb_to (EV_P_ ev_timer *w, int revents)
889	{	2106	{
890	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	2107	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
891	}	2108	}
892		2109
893	void	2110	void
894	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	2111	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
895	{	2112	{
896	struct ev_once *once = malloc (sizeof (struct ev_once));	2113	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
897		2114
898	if (!once)	2115	if (expect_false (!once))
899	cb (EV_ERROR, arg);	2116	{
900	else	2117	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		2118	return;
901	{	2119	}
		2120
902	once->cb = cb;	2121	once->cb = cb;
903	once->arg = arg;	2122	once->arg = arg;
904		2123
905	evw_init (&once->io, once_cb_io);	2124	ev_init (&once->io, once_cb_io);
906
907	if (fd >= 0)	2125	if (fd >= 0)
908	{	2126	{
909	evio_set (&once->io, fd, events);	2127	ev_io_set (&once->io, fd, events);
910	evio_start (&once->io);	2128	ev_io_start (EV_A_ &once->io);
911	}	2129	}
912		2130
913	evw_init (&once->to, once_cb_to);	2131	ev_init (&once->to, once_cb_to);
914
915	if (timeout >= 0.)	2132	if (timeout >= 0.)
916	{	2133	{
917	evtimer_set (&once->to, timeout, 0.);	2134	ev_timer_set (&once->to, timeout, 0.);
918	evtimer_start (&once->to);	2135	ev_timer_start (EV_A_ &once->to);
919	}
920	}
921	}
922
923	/*****************************************************************************/
924
925	#if 0
926
927	struct ev_io wio;
928
929	static void
930	sin_cb (struct ev_io *w, int revents)
931	{
932	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
933	}
934
935	static void
936	ocb (struct ev_timer *w, int revents)
937	{
938	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
939	evtimer_stop (w);
940	evtimer_start (w);
941	}
942
943	static void
944	scb (struct ev_signal *w, int revents)
945	{
946	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
947	evio_stop (&wio);
948	evio_start (&wio);
949	}
950
951	static void
952	gcb (struct ev_signal *w, int revents)
953	{
954	fprintf (stderr, "generic %x\n", revents);
955
956	}
957
958	int main (void)
959	{
960	ev_init (0);
961
962	evio_init (&wio, sin_cb, 0, EV_READ);
963	evio_start (&wio);
964
965	struct ev_timer t[10000];
966
967	#if 0
968	int i;
969	for (i = 0; i < 10000; ++i)
970	{	2136	}
971	struct ev_timer *w = t + i;
972	evw_init (w, ocb, i);
973	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
974	evtimer_start (w);
975	if (drand48 () < 0.5)
976	evtimer_stop (w);
977	}
978	#endif
979
980	struct ev_timer t1;
981	evtimer_init (&t1, ocb, 5, 10);
982	evtimer_start (&t1);
983
984	struct ev_signal sig;
985	evsignal_init (&sig, scb, SIGQUIT);
986	evsignal_start (&sig);
987
988	struct ev_check cw;
989	evcheck_init (&cw, gcb);
990	evcheck_start (&cw);
991
992	struct ev_idle iw;
993	evidle_init (&iw, gcb);
994	evidle_start (&iw);
995
996	ev_loop (0);
997
998	return 0;
999	}	2137	}
1000		2138
		2139	#ifdef __cplusplus
		2140	}
1001	#endif	2141	#endif
1002		2142
1003
1004
1005

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Comparing libev/ev.c (file contents): Revision 1.19 by root, Wed Oct 31 17:55:55 2007 UTC vs. Revision 1.152 by root, Wed Nov 28 11:15:55 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.19 by root, Wed Oct 31 17:55:55 2007 UTC vs.
Revision 1.152 by root, Wed Nov 28 11:15:55 2007 UTC