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

Comparing libev/ev.c (file contents):
Revision 1.31 by root, Thu Nov 1 09:05:33 2007 UTC vs.
Revision 1.153 by root, Wed Nov 28 11:41:18 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
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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	*/
		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
29	#if EV_USE_CONFIG_H	37	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
30	# include "config.h"	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
31	#endif	107	#endif
32		108
33	#include <math.h>	109	#include <math.h>
34	#include <stdlib.h>	110	#include <stdlib.h>
35	#include <unistd.h>
36	#include <fcntl.h>	111	#include <fcntl.h>
37	#include <signal.h>
38	#include <stddef.h>	112	#include <stddef.h>
39		113
40	#include <stdio.h>	114	#include <stdio.h>
41		115
42	#include <assert.h>	116	#include <assert.h>
43	#include <errno.h>	117	#include <errno.h>
44	#include <sys/types.h>	118	#include <sys/types.h>
45	#include <sys/wait.h>
46	#include <sys/time.h>
47	#include <time.h>	119	#include <time.h>
48		120
		121	#include <signal.h>
		122
		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
		138	# endif
		139	#endif
		140
		141	/**/
		142
49	#ifndef EV_USE_MONOTONIC	143	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	144	# define EV_USE_MONOTONIC 0
52	# endif	145	#endif
		146
		147	#ifndef EV_USE_REALTIME
		148	# define EV_USE_REALTIME 0
53	#endif	149	#endif
54		150
55	#ifndef EV_USE_SELECT	151	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	152	# define EV_USE_SELECT 1
57	#endif	153	#endif
58		154
		155	#ifndef EV_USE_POLL
		156	# ifdef _WIN32
		157	# define EV_USE_POLL 0
		158	# else
		159	# define EV_USE_POLL 1
		160	# endif
		161	#endif
		162
59	#ifndef EV_USE_EPOLL	163	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	164	# define EV_USE_EPOLL 0
61	#endif	165	#endif
62		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
		184	# endif
		185	#endif
		186
		187	#ifndef EV_INOTIFY_HASHSIZE
		188	# if EV_MINIMAL
		189	# define EV_INOTIFY_HASHSIZE 1
		190	# else
		191	# define EV_INOTIFY_HASHSIZE 16
		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
63	#ifndef CLOCK_REALTIME	202	#ifndef CLOCK_REALTIME
		203	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	204	# define EV_USE_REALTIME 0
65	#endif	205	#endif
66	#ifndef EV_USE_REALTIME	206
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	207	#if EV_SELECT_IS_WINSOCKET
		208	# include <winsock.h>
68	#endif	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	/**/
69		220
70	#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) */
71	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	222	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
72	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
73	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	223	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds */
74		224
75	#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
76		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
77	typedef struct ev_watcher *W;	251	typedef ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	252	typedef ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	253	typedef ev_watcher_time *WT;
80		254
81	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
82	ev_tstamp ev_now;	353	ev_tstamp ev_rt_now;
83	int ev_method;	354	#define VAR(name,decl) static decl;
		355	#include "ev_vars.h"
		356	#undef VAR
84		357
85	static int have_monotonic; /* runtime */	358	static int ev_default_loop_ptr;
86		359
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	360	#endif
88	static void (*method_modify)(int fd, int oev, int nev);
89	static void (*method_poll)(ev_tstamp timeout);
90		361
91	/*****************************************************************************/	362	/*****************************************************************************/
92		363
93	ev_tstamp	364	ev_tstamp
94	ev_time (void)	365	ev_time (void)
…		…
102	gettimeofday (&tv, 0);	373	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	374	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	375	#endif
105	}	376	}
106		377
107	static ev_tstamp	378	ev_tstamp inline_size
108	get_clock (void)	379	get_clock (void)
109	{	380	{
110	#if EV_USE_MONOTONIC	381	#if EV_USE_MONOTONIC
111	if (have_monotonic)	382	if (expect_true (have_monotonic))
112	{	383	{
113	struct timespec ts;	384	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	385	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	386	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	387	}
117	#endif	388	#endif
118		389
119	return ev_time ();	390	return ev_time ();
120	}	391	}
121		392
		393	#if EV_MULTIPLICITY
		394	ev_tstamp
		395	ev_now (EV_P)
		396	{
		397	return ev_rt_now;
		398	}
		399	#endif
		400
122	#define array_roundsize(base,n) ((n) \| 4 & ~3)	401	#define array_roundsize(type,n) (((n) \| 4) & ~3)
123		402
124	#define array_needsize(base,cur,cnt,init) \	403	#define array_needsize(type,base,cur,cnt,init) \
125	if ((cnt) > cur) \	404	if (expect_false ((cnt) > cur)) \
126	{ \	405	{ \
127	int newcnt = cur; \	406	int newcnt = cur; \
128	do \	407	do \
129	{ \	408	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	409	newcnt = array_roundsize (type, newcnt << 1); \
131	} \	410	} \
132	while ((cnt) > newcnt); \	411	while ((cnt) > newcnt); \
133	\	412	\
134	base = realloc (base, sizeof (base) (newcnt)); \	413	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
135	init (base + cur, newcnt - cur); \	414	init (base + cur, newcnt - cur); \
136	cur = newcnt; \	415	cur = newcnt; \
137	}	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;
138		428
139	/*****************************************************************************/	429	/*****************************************************************************/
140		430
141	typedef struct	431	void noinline
		432	ev_feed_event (EV_P_ void *w, int revents)
142	{	433	{
143	struct ev_io *head;	434	W w_ = (W)w;
144	int events;
145	} ANFD;
146		435
147	static ANFD *anfds;	436	if (expect_false (w_->pending))
148	static int anfdmax;	437	{
		438	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		439	return;
		440	}
149		441
150	static void	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
151	anfds_init (ANFD *base, int count)	460	anfds_init (ANFD *base, int count)
152	{	461	{
153	while (count--)	462	while (count--)
154	{	463	{
155	base->head = 0;	464	base->head = 0;
156	base->events = EV_NONE;	465	base->events = EV_NONE;
		466	base->reify = 0;
		467
157	++base;	468	++base;
158	}	469	}
159	}	470	}
160		471
161	typedef struct	472	void inline_speed
162	{
163	W w;
164	int events;
165	} ANPENDING;
166
167	static ANPENDING *pendings;
168	static int pendingmax, pendingcnt;
169
170	static void
171	event (W w, int events)
172	{
173	w->pending = ++pendingcnt;
174	array_needsize (pendings, pendingmax, pendingcnt, );
175	pendings [pendingcnt - 1].w = w;
176	pendings [pendingcnt - 1].events = events;
177	}
178
179	static void
180	queue_events (W *events, int eventcnt, int type)
181	{
182	int i;
183
184	for (i = 0; i < eventcnt; ++i)
185	event (events [i], type);
186	}
187
188	static void
189	fd_event (int fd, int events)	473	fd_event (EV_P_ int fd, int revents)
190	{	474	{
191	ANFD *anfd = anfds + fd;	475	ANFD *anfd = anfds + fd;
192	struct ev_io *w;	476	ev_io *w;
193		477
194	for (w = anfd->head; w; w = w->next)	478	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
195	{	479	{
196	int ev = w->events & events;	480	int ev = w->events & revents;
197		481
198	if (ev)	482	if (ev)
199	event ((W)w, ev);	483	ev_feed_event (EV_A_ (W)w, ev);
200	}	484	}
201	}	485	}
202		486
203	/*****************************************************************************/	487	void
		488	ev_feed_fd_event (EV_P_ int fd, int revents)
		489	{
		490	fd_event (EV_A_ fd, revents);
		491	}
204		492
205	static int *fdchanges;	493	void inline_size
206	static int fdchangemax, fdchangecnt;	494	fd_reify (EV_P)
207
208	static void
209	fd_reify (void)
210	{	495	{
211	int i;	496	int i;
212		497
213	for (i = 0; i < fdchangecnt; ++i)	498	for (i = 0; i < fdchangecnt; ++i)
214	{	499	{
215	int fd = fdchanges [i];	500	int fd = fdchanges [i];
216	ANFD *anfd = anfds + fd;	501	ANFD *anfd = anfds + fd;
217	struct ev_io *w;	502	ev_io *w;
218		503
219	int events = 0;	504	int events = 0;
220		505
221	for (w = anfd->head; w; w = w->next)	506	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
222	events \|= w->events;	507	events \|= w->events;
223		508
224	anfd->events &= ~EV_REIFY;	509	#if EV_SELECT_IS_WINSOCKET
225		510	if (events)
226	if (anfd->events != events)
227	{	511	{
228	method_modify (fd, anfd->events, events);	512	unsigned long argp;
229	anfd->events = events;	513	anfd->handle = _get_osfhandle (fd);
		514	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
230	}	515	}
		516	#endif
		517
		518	anfd->reify = 0;
		519
		520	backend_modify (EV_A_ fd, anfd->events, events);
		521	anfd->events = events;
231	}	522	}
232		523
233	fdchangecnt = 0;	524	fdchangecnt = 0;
234	}	525	}
235		526
236	static void	527	void inline_size
237	fd_change (int fd)	528	fd_change (EV_P_ int fd)
238	{	529	{
239	if (anfds [fd].events & EV_REIFY \|\| fdchangecnt < 0)	530	if (expect_false (anfds [fd].reify))
240	return;	531	return;
241		532
242	anfds [fd].events \|= EV_REIFY;	533	anfds [fd].reify = 1;
243		534
244	++fdchangecnt;	535	++fdchangecnt;
245	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	536	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
246	fdchanges [fdchangecnt - 1] = fd;	537	fdchanges [fdchangecnt - 1] = fd;
247	}	538	}
248		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
249	/* called on EBADF to verify fds */	562	/* called on EBADF to verify fds */
250	static void	563	static void noinline
251	fd_recheck (void)	564	fd_ebadf (EV_P)
252	{	565	{
253	int fd;	566	int fd;
254		567
255	for (fd = 0; fd < anfdmax; ++fd)	568	for (fd = 0; fd < anfdmax; ++fd)
256	if (anfds [fd].events)	569	if (anfds [fd].events)
257	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	570	if (!fd_valid (fd) == -1 && errno == EBADF)
258	while (anfds [fd].head)	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)
259	{	582	{
260	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT);	583	fd_kill (EV_A_ fd);
261	ev_io_stop (anfds [fd].head);	584	return;
262	}	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	}
263	}	601	}
264		602
265	/*****************************************************************************/	603	/*****************************************************************************/
266		604
267	static struct ev_timer **timers;	605	void inline_speed
268	static int timermax, timercnt;
269
270	static struct ev_periodic **periodics;
271	static int periodicmax, periodiccnt;
272
273	static void
274	upheap (WT *timers, int k)	606	upheap (WT *heap, int k)
275	{	607	{
276	WT w = timers [k];	608	WT w = heap [k];
277		609
278	while (k && timers [k >> 1]->at > w->at)	610	while (k && heap [k >> 1]->at > w->at)
279	{	611	{
280	timers [k] = timers [k >> 1];	612	heap [k] = heap [k >> 1];
281	timers [k]->active = k + 1;	613	((W)heap [k])->active = k + 1;
282	k >>= 1;	614	k >>= 1;
283	}	615	}
284		616
285	timers [k] = w;	617	heap [k] = w;
286	timers [k]->active = k + 1;	618	((W)heap [k])->active = k + 1;
287		619
288	}	620	}
289		621
290	static void	622	void inline_speed
291	downheap (WT *timers, int N, int k)	623	downheap (WT *heap, int N, int k)
292	{	624	{
293	WT w = timers [k];	625	WT w = heap [k];
294		626
295	while (k < (N >> 1))	627	while (k < (N >> 1))
296	{	628	{
297	int j = k << 1;	629	int j = k << 1;
298		630
299	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	631	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
300	++j;	632	++j;
301		633
302	if (w->at <= timers [j]->at)	634	if (w->at <= heap [j]->at)
303	break;	635	break;
304		636
305	timers [k] = timers [j];	637	heap [k] = heap [j];
306	timers [k]->active = k + 1;	638	((W)heap [k])->active = k + 1;
307	k = j;	639	k = j;
308	}	640	}
309		641
310	timers [k] = w;	642	heap [k] = w;
311	timers [k]->active = k + 1;	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);
312	}	651	}
313		652
314	/*****************************************************************************/	653	/*****************************************************************************/
315		654
316	typedef struct	655	typedef struct
317	{	656	{
318	struct ev_signal *head;	657	WL head;
319	sig_atomic_t gotsig;	658	sig_atomic_t volatile gotsig;
320	} ANSIG;	659	} ANSIG;
321		660
322	static ANSIG *signals;	661	static ANSIG *signals;
323	static int signalmax;	662	static int signalmax;
324		663
325	static int sigpipe [2];	664	static int sigpipe [2];
326	static sig_atomic_t gotsig;	665	static sig_atomic_t volatile gotsig;
327	static struct ev_io sigev;	666	static ev_io sigev;
328		667
329	static void	668	void inline_size
330	signals_init (ANSIG *base, int count)	669	signals_init (ANSIG *base, int count)
331	{	670	{
332	while (count--)	671	while (count--)
333	{	672	{
334	base->head = 0;	673	base->head = 0;
335	base->gotsig = 0;	674	base->gotsig = 0;
		675
336	++base;	676	++base;
337	}	677	}
338	}	678	}
339		679
340	static void	680	static void
341	sighandler (int signum)	681	sighandler (int signum)
342	{	682	{
		683	#if _WIN32
		684	signal (signum, sighandler);
		685	#endif
		686
343	signals [signum - 1].gotsig = 1;	687	signals [signum - 1].gotsig = 1;
344		688
345	if (!gotsig)	689	if (!gotsig)
346	{	690	{
		691	int old_errno = errno;
347	gotsig = 1;	692	gotsig = 1;
348	write (sigpipe [1], &gotsig, 1);	693	write (sigpipe [1], &signum, 1);
		694	errno = old_errno;
349	}	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);
350	}	716	}
351		717
352	static void	718	static void
353	sigcb (struct ev_io *iow, int revents)	719	sigcb (EV_P_ ev_io *iow, int revents)
354	{	720	{
355	struct ev_signal *w;
356	int sig;	721	int signum;
357		722
		723	read (sigpipe [0], &revents, 1);
358	gotsig = 0;	724	gotsig = 0;
359	read (sigpipe [0], &revents, 1);
360		725
361	for (sig = signalmax; sig--; )	726	for (signum = signalmax; signum--; )
362	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)
363	{	769	{
364	signals [sig].gotsig = 0;	770	ev_priority (w) = ev_priority (sw); /* need to do it now */
365		771	w->rpid = pid;
366	for (w = signals [sig].head; w; w = w->next)	772	w->rstatus = status;
367	event ((W)w, EV_SIGNAL);	773	ev_feed_event (EV_A_ (W)w, EV_CHILD);
368	}	774	}
369	}	775	}
370
371	static void
372	siginit (void)
373	{
374	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
375	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
376
377	/* rather than sort out wether we really need nb, set it */
378	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
379	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
380
381	ev_io_set (&sigev, sigpipe [0], EV_READ);
382	ev_io_start (&sigev);
383	}
384
385	/*****************************************************************************/
386
387	static struct ev_idle **idles;
388	static int idlemax, idlecnt;
389
390	static struct ev_prepare **prepares;
391	static int preparemax, preparecnt;
392
393	static struct ev_check **checks;
394	static int checkmax, checkcnt;
395
396	/*****************************************************************************/
397
398	static struct ev_child *childs [PID_HASHSIZE];
399	static struct ev_signal childev;
400		776
401	#ifndef WCONTINUED	777	#ifndef WCONTINUED
402	# define WCONTINUED 0	778	# define WCONTINUED 0
403	#endif	779	#endif
404		780
405	static void	781	static void
406	childcb (struct ev_signal *sw, int revents)	782	childcb (EV_P_ ev_signal *sw, int revents)
407	{	783	{
408	struct ev_child *w;
409	int pid, status;	784	int pid, status;
410		785
		786	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
411	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	787	if (0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
412	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	788	if (!WCONTINUED
413	if (w->pid == pid \|\| w->pid == -1)	789	\|\| errno != EINVAL
414	{	790	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))
415	w->status = status;	791	return;
416	event ((W)w, EV_CHILD);	792
417	}	793	/* make sure we are called again until all childs have been reaped */
		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 */
418	}	800	}
		801
		802	#endif
419		803
420	/*****************************************************************************/	804	/*****************************************************************************/
421		805
		806	#if EV_USE_PORT
		807	# include "ev_port.c"
		808	#endif
		809	#if EV_USE_KQUEUE
		810	# include "ev_kqueue.c"
		811	#endif
422	#if EV_USE_EPOLL	812	#if EV_USE_EPOLL
423	# include "ev_epoll.c"	813	# include "ev_epoll.c"
424	#endif	814	#endif
		815	#if EV_USE_POLL
		816	# include "ev_poll.c"
		817	#endif
425	#if EV_USE_SELECT	818	#if EV_USE_SELECT
426	# include "ev_select.c"	819	# include "ev_select.c"
427	#endif	820	#endif
428		821
429	int	822	int
…		…
436	ev_version_minor (void)	829	ev_version_minor (void)
437	{	830	{
438	return EV_VERSION_MINOR;	831	return EV_VERSION_MINOR;
439	}	832	}
440		833
441	int ev_init (int flags)	834	/* return true if we are running with elevated privileges and should ignore env variables */
		835	int inline_size
		836	enable_secure (void)
442	{	837	{
443	if (!ev_method)	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)
444	{	896	{
445	#if EV_USE_MONOTONIC	897	#if EV_USE_MONOTONIC
446	{	898	{
447	struct timespec ts;	899	struct timespec ts;
448	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	900	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
449	have_monotonic = 1;	901	have_monotonic = 1;
450	}	902	}
451	#endif	903	#endif
452		904
453	ev_now = ev_time ();	905	ev_rt_now = ev_time ();
454	now = get_clock ();	906	mn_now = get_clock ();
		907	now_floor = mn_now;
455	diff = ev_now - now;	908	rtmn_diff = ev_rt_now - mn_now;
456		909
457	if (pipe (sigpipe))	910	if (!(flags & EVFLAG_NOENV)
458	return 0;	911	&& !enable_secure ()
		912	&& getenv ("LIBEV_FLAGS"))
		913	flags = atoi (getenv ("LIBEV_FLAGS"));
459		914
460	ev_method = EVMETHOD_NONE;	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
461	#if EV_USE_EPOLL	930	#if EV_USE_EPOLL
462	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	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);
463	#endif	935	#endif
464	#if EV_USE_SELECT	936	#if EV_USE_SELECT
465	if (ev_method == EVMETHOD_NONE) select_init (flags);	937	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
466	#endif	938	#endif
467		939
468	if (ev_method)	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))
469	{	1075	{
470	ev_watcher_init (&sigev, sigcb);
471	siginit ();	1076	siginit (EV_A);
472		1077
		1078	#ifndef _WIN32
473	ev_signal_init (&childev, childcb, SIGCHLD);	1079	ev_signal_init (&childev, childcb, SIGCHLD);
		1080	ev_set_priority (&childev, EV_MAXPRI);
474	ev_signal_start (&childev);	1081	ev_signal_start (EV_A_ &childev);
		1082	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1083	#endif
475	}	1084	}
		1085	else
		1086	ev_default_loop_ptr = 0;
476	}	1087	}
477		1088
478	return ev_method;	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;
479	}	1122	}
480		1123
481	/*****************************************************************************/	1124	/*****************************************************************************/
482		1125
483	void	1126	int inline_size
484	ev_prefork (void)	1127	any_pending (EV_P)
485	{	1128	{
486	/* nop */	1129	int pri;
487	}
488		1130
489	void	1131	for (pri = NUMPRI; pri--; )
490	ev_postfork_parent (void)	1132	if (pendingcnt [pri])
491	{	1133	return 1;
492	/* nop */
493	}
494		1134
495	void	1135	return 0;
496	ev_postfork_child (void)
497	{
498	#if EV_USE_EPOLL
499	if (ev_method == EVMETHOD_EPOLL)
500	epoll_postfork_child ();
501	#endif
502
503	ev_io_stop (&sigev);
504	close (sigpipe [0]);
505	close (sigpipe [1]);
506	pipe (sigpipe);
507	siginit ();
508	}	1136	}
509		1137
510	/*****************************************************************************/	1138	void inline_speed
511
512	static void
513	call_pending (void)	1139	call_pending (EV_P)
514	{	1140	{
		1141	int pri;
		1142
		1143	for (pri = NUMPRI; pri--; )
515	while (pendingcnt)	1144	while (pendingcnt [pri])
516	{	1145	{
517	ANPENDING *p = pendings + --pendingcnt;	1146	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
518		1147
519	if (p->w)	1148	if (expect_true (p->w))
520	{	1149	{
		1150	/assert (("non-pending watcher on pending list", p->w->pending));/
		1151
521	p->w->pending = 0;	1152	p->w->pending = 0;
522	p->w->cb (p->w, p->events);	1153	EV_CB_INVOKE (p->w, p->events);
523	}	1154	}
524	}	1155	}
525	}	1156	}
526		1157
527	static void	1158	void inline_size
528	timers_reify (void)	1159	timers_reify (EV_P)
529	{	1160	{
530	while (timercnt && timers [0]->at <= now)	1161	while (timercnt && ((WT)timers [0])->at <= mn_now)
531	{	1162	{
532	struct ev_timer *w = timers [0];	1163	ev_timer *w = timers [0];
		1164
		1165	/assert (("inactive timer on timer heap detected", ev_is_active (w)));/
533		1166
534	/* first reschedule or stop timer */	1167	/* first reschedule or stop timer */
535	if (w->repeat)	1168	if (w->repeat)
536	{	1169	{
		1170	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1171
537	w->at = now + w->repeat;	1172	((WT)w)->at += w->repeat;
538	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
539	downheap ((WT *)timers, timercnt, 0);	1176	downheap ((WT *)timers, timercnt, 0);
540	}	1177	}
541	else	1178	else
542	ev_timer_stop (w); /* nonrepeating: stop timer */	1179	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
543		1180
544	event ((W)w, EV_TIMEOUT);	1181	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
545	}	1182	}
546	}	1183	}
547		1184
548	static void	1185	#if EV_PERIODIC_ENABLE
		1186	void inline_size
549	periodics_reify (void)	1187	periodics_reify (EV_P)
550	{	1188	{
551	while (periodiccnt && periodics [0]->at <= ev_now)	1189	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
552	{	1190	{
553	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)));/
554		1194
555	/* first reschedule or stop timer */	1195	/* first reschedule or stop timer */
556	if (w->interval)	1196	if (w->reschedule_cb)
557	{	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	{
558	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;
559	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));
560	downheap ((WT *)periodics, periodiccnt, 0);	1206	downheap ((WT *)periodics, periodiccnt, 0);
561	}	1207	}
562	else	1208	else
563	ev_periodic_stop (w); /* nonrepeating: stop timer */	1209	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
564		1210
565	event ((W)w, EV_TIMEOUT);	1211	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
566	}	1212	}
567	}	1213	}
568		1214
569	static void	1215	static void noinline
570	periodics_reschedule (ev_tstamp diff)	1216	periodics_reschedule (EV_P)
571	{	1217	{
572	int i;	1218	int i;
573		1219
574	/* adjust periodics after time jump */	1220	/* adjust periodics after time jump */
575	for (i = 0; i < periodiccnt; ++i)	1221	for (i = 0; i < periodiccnt; ++i)
576	{	1222	{
577	struct ev_periodic *w = periodics [i];	1223	ev_periodic *w = periodics [i];
578		1224
		1225	if (w->reschedule_cb)
		1226	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
579	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))
580	{	1264	{
581	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1265	ev_tstamp odiff = rtmn_diff;
582		1266
583	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; )
584	{	1276	{
585	ev_periodic_stop (w);	1277	rtmn_diff = ev_rt_now - mn_now;
586	ev_periodic_start (w);
587		1278
588	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;
589	}	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) */
590	}	1292	}
591	}	1293	}
592	}	1294	else
593		1295	#endif
594	static void	1296	{
595	time_update (void)
596	{
597	int i;
598
599	ev_now = ev_time ();	1297	ev_rt_now = ev_time ();
600		1298
601	if (have_monotonic)	1299	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
602	{
603	ev_tstamp odiff = diff;
604
605	for (i = 4; --i; ) /* loop a few times, before making important decisions */
606	{	1300	{
607	now = get_clock ();	1301	#if EV_PERIODIC_ENABLE
608	diff = ev_now - now;
609
610	if (fabs (odiff - diff) < MIN_TIMEJUMP)
611	return; /* all is well */
612
613	ev_now = ev_time ();
614	}
615
616	periodics_reschedule (diff - odiff);
617	/* no timer adjustment, as the monotonic clock doesn't jump */
618	}
619	else
620	{
621	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
622	{
623	periodics_reschedule (ev_now - now);	1302	periodics_reschedule (EV_A);
		1303	#endif
624		1304
625	/* 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 */
626	for (i = 0; i < timercnt; ++i)	1306	for (i = 0; i < timercnt; ++i)
627	timers [i]->at += diff;	1307	((WT)timers [i])->at += ev_rt_now - mn_now;
628	}	1308	}
629		1309
630	now = ev_now;	1310	mn_now = ev_rt_now;
631	}	1311	}
632	}	1312	}
633		1313
634	int ev_loop_done;	1314	void
		1315	ev_ref (EV_P)
		1316	{
		1317	++activecnt;
		1318	}
635		1319
		1320	void
		1321	ev_unref (EV_P)
		1322	{
		1323	--activecnt;
		1324	}
		1325
		1326	static int loop_done;
		1327
		1328	void
636	void ev_loop (int flags)	1329	ev_loop (EV_P_ int flags)
637	{	1330	{
638	double block;
639	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	1331	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)
		1332	? EVUNLOOP_ONE
		1333	: EVUNLOOP_CANCEL;
640		1334
641	do	1335	while (activecnt)
642	{	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
643	/* queue check watchers (and execute them) */	1347	/* queue check watchers (and execute them) */
644	if (preparecnt)	1348	if (expect_false (preparecnt))
645	{	1349	{
646	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1350	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
647	call_pending ();	1351	call_pending (EV_A);
648	}	1352	}
649		1353
		1354	/* we might have forked, so reify kernel state if necessary */
		1355	if (expect_false (postfork))
		1356	loop_fork (EV_A);
		1357
650	/* update fd-related kernel structures */	1358	/* update fd-related kernel structures */
651	fd_reify ();	1359	fd_reify (EV_A);
652		1360
653	/* calculate blocking time */	1361	/* calculate blocking time */
		1362	{
		1363	double block;
654		1364
655	/* we only need this for !monotonic clockor timers, but as we basically
656	always have timers, we just calculate it always */
657	ev_now = ev_time ();
658
659	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1365	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
660	block = 0.;	1366	block = 0.; /* do not block at all */
661	else	1367	else
662	{	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
663	block = MAX_BLOCKTIME;	1380	block = MAX_BLOCKTIME;
664		1381
665	if (timercnt)	1382	if (timercnt)
666	{	1383	{
667	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;
668	if (block > to) block = to;	1385	if (block > to) block = to;
669	}	1386	}
670		1387
		1388	#if EV_PERIODIC_ENABLE
671	if (periodiccnt)	1389	if (periodiccnt)
672	{	1390	{
673	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1391	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
674	if (block > to) block = to;	1392	if (block > to) block = to;
675	}	1393	}
		1394	#endif
676		1395
677	if (block < 0.) block = 0.;	1396	if (expect_false (block < 0.)) block = 0.;
678	}	1397	}
679		1398
680	method_poll (block);	1399	backend_poll (EV_A_ block);
		1400	}
681		1401
682	/* update ev_now, do magic */	1402	/* update ev_rt_now, do magic */
683	time_update ();	1403	time_update (EV_A);
684		1404
685	/* queue pending timers and reschedule them */	1405	/* queue pending timers and reschedule them */
686	timers_reify (); /* relative timers called last */	1406	timers_reify (EV_A); /* relative timers called last */
		1407	#if EV_PERIODIC_ENABLE
687	periodics_reify (); /* absolute timers called first */	1408	periodics_reify (EV_A); /* absolute timers called first */
		1409	#endif
688		1410
689	/* queue idle watchers unless io or timers are pending */	1411	/* queue idle watchers unless other events are pending */
690	if (!pendingcnt)	1412	if (idlecnt && !any_pending (EV_A))
691	queue_events ((W *)idles, idlecnt, EV_IDLE);	1413	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
692		1414
693	/* queue check watchers, to be executed first */	1415	/* queue check watchers, to be executed first */
694	if (checkcnt)	1416	if (expect_false (checkcnt))
695	queue_events ((W *)checks, checkcnt, EV_CHECK);	1417	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
696		1418
697	call_pending ();	1419	call_pending (EV_A);
698	}
699	while (!ev_loop_done);
700		1420
701	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	{
702	ev_loop_done = 0;	1432	loop_done = how;
703	}	1433	}
704		1434
705	/*****************************************************************************/	1435	/*****************************************************************************/
706		1436
707	static void	1437	void inline_size
708	wlist_add (WL *head, WL elem)	1438	wlist_add (WL *head, WL elem)
709	{	1439	{
710	elem->next = *head;	1440	elem->next = *head;
711	*head = elem;	1441	*head = elem;
712	}	1442	}
713		1443
714	static void	1444	void inline_size
715	wlist_del (WL *head, WL elem)	1445	wlist_del (WL *head, WL elem)
716	{	1446	{
717	while (*head)	1447	while (*head)
718	{	1448	{
719	if (*head == elem)	1449	if (*head == elem)
…		…
724		1454
725	head = &(*head)->next;	1455	head = &(*head)->next;
726	}	1456	}
727	}	1457	}
728		1458
729	static void	1459	void inline_speed
730	ev_clear (W w)	1460	ev_clear_pending (EV_P_ W w)
731	{	1461	{
732	if (w->pending)	1462	if (w->pending)
733	{	1463	{
734	pendings [w->pending - 1].w = 0;	1464	pendings [ABSPRI (w)][w->pending - 1].w = 0;
735	w->pending = 0;	1465	w->pending = 0;
736	}	1466	}
737	}	1467	}
738		1468
739	static void	1469	void inline_speed
740	ev_start (W w, int active)	1470	ev_start (EV_P_ W w, int active)
741	{	1471	{
		1472	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1473	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1474
742	w->active = active;	1475	w->active = active;
		1476	ev_ref (EV_A);
743	}	1477	}
744		1478
745	static void	1479	void inline_size
746	ev_stop (W w)	1480	ev_stop (EV_P_ W w)
747	{	1481	{
		1482	ev_unref (EV_A);
748	w->active = 0;	1483	w->active = 0;
749	}	1484	}
750		1485
751	/*****************************************************************************/	1486	/*****************************************************************************/
752		1487
753	void	1488	void
754	ev_io_start (struct ev_io *w)	1489	ev_io_start (EV_P_ ev_io *w)
755	{	1490	{
756	if (ev_is_active (w))
757	return;
758
759	int fd = w->fd;	1491	int fd = w->fd;
760		1492
		1493	if (expect_false (ev_is_active (w)))
		1494	return;
		1495
		1496	assert (("ev_io_start called with negative fd", fd >= 0));
		1497
761	ev_start ((W)w, 1);	1498	ev_start (EV_A_ (W)w, 1);
762	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1499	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
763	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1500	wlist_add ((WL *)&anfds[fd].head, (WL)w);
764		1501
765	fd_change (fd);	1502	fd_change (EV_A_ fd);
766	}	1503	}
767		1504
768	void	1505	void
769	ev_io_stop (struct ev_io *w)	1506	ev_io_stop (EV_P_ ev_io *w)
770	{	1507	{
771	ev_clear ((W)w);	1508	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1509	if (expect_false (!ev_is_active (w)))
773	return;	1510	return;
		1511
		1512	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
774		1513
775	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1514	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
776	ev_stop ((W)w);	1515	ev_stop (EV_A_ (W)w);
777		1516
778	fd_change (w->fd);	1517	fd_change (EV_A_ w->fd);
779	}	1518	}
780		1519
781	void	1520	void
782	ev_timer_start (struct ev_timer *w)	1521	ev_timer_start (EV_P_ ev_timer *w)
783	{	1522	{
784	if (ev_is_active (w))	1523	if (expect_false (ev_is_active (w)))
785	return;	1524	return;
786		1525
787	w->at += now;	1526	((WT)w)->at += mn_now;
788		1527
789	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.));
790		1529
791	ev_start ((W)w, ++timercnt);	1530	ev_start (EV_A_ (W)w, ++timercnt);
792	array_needsize (timers, timermax, timercnt, );	1531	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
793	timers [timercnt - 1] = w;	1532	timers [timercnt - 1] = w;
794	upheap ((WT *)timers, timercnt - 1);	1533	upheap ((WT *)timers, timercnt - 1);
795	}
796		1534
		1535	/assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));/
		1536	}
		1537
797	void	1538	void
798	ev_timer_stop (struct ev_timer *w)	1539	ev_timer_stop (EV_P_ ev_timer *w)
799	{	1540	{
800	ev_clear ((W)w);	1541	ev_clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1542	if (expect_false (!ev_is_active (w)))
802	return;	1543	return;
803		1544
804	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))
805	{	1551	{
806	timers [w->active - 1] = timers [timercnt];	1552	timers [active] = timers [timercnt];
807	downheap ((WT *)timers, timercnt, w->active - 1);	1553	adjustheap ((WT *)timers, timercnt, active);
808	}	1554	}
		1555	}
809		1556
810	w->at = w->repeat;	1557	((WT)w)->at -= mn_now;
811		1558
812	ev_stop ((W)w);	1559	ev_stop (EV_A_ (W)w);
813	}	1560	}
814		1561
815	void	1562	void
816	ev_timer_again (struct ev_timer *w)	1563	ev_timer_again (EV_P_ ev_timer *w)
817	{	1564	{
818	if (ev_is_active (w))	1565	if (ev_is_active (w))
819	{	1566	{
820	if (w->repeat)	1567	if (w->repeat)
821	{	1568	{
822	w->at = now + w->repeat;	1569	((WT)w)->at = mn_now + w->repeat;
823	downheap ((WT *)timers, timercnt, w->active - 1);	1570	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
824	}	1571	}
825	else	1572	else
826	ev_timer_stop (w);	1573	ev_timer_stop (EV_A_ w);
827	}	1574	}
828	else if (w->repeat)	1575	else if (w->repeat)
		1576	{
		1577	w->at = w->repeat;
829	ev_timer_start (w);	1578	ev_timer_start (EV_A_ w);
		1579	}
830	}	1580	}
831		1581
		1582	#if EV_PERIODIC_ENABLE
832	void	1583	void
833	ev_periodic_start (struct ev_periodic *w)	1584	ev_periodic_start (EV_P_ ev_periodic *w)
834	{	1585	{
835	if (ev_is_active (w))	1586	if (expect_false (ev_is_active (w)))
836	return;	1587	return;
837		1588
838	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1589	if (w->reschedule_cb)
839		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.));
840	/* 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 */
841	if (w->interval)
842	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	}
843		1597
844	ev_start ((W)w, ++periodiccnt);	1598	ev_start (EV_A_ (W)w, ++periodiccnt);
845	array_needsize (periodics, periodicmax, periodiccnt, );	1599	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
846	periodics [periodiccnt - 1] = w;	1600	periodics [periodiccnt - 1] = w;
847	upheap ((WT *)periodics, periodiccnt - 1);	1601	upheap ((WT *)periodics, periodiccnt - 1);
848	}
849		1602
		1603	/assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));/
		1604	}
		1605
850	void	1606	void
851	ev_periodic_stop (struct ev_periodic *w)	1607	ev_periodic_stop (EV_P_ ev_periodic *w)
852	{	1608	{
853	ev_clear ((W)w);	1609	ev_clear_pending (EV_A_ (W)w);
854	if (!ev_is_active (w))	1610	if (expect_false (!ev_is_active (w)))
855	return;	1611	return;
856		1612
857	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))
858	{	1619	{
859	periodics [w->active - 1] = periodics [periodiccnt];	1620	periodics [active] = periodics [periodiccnt];
860	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1621	adjustheap ((WT *)periodics, periodiccnt, active);
861	}	1622	}
		1623	}
862		1624
863	ev_stop ((W)w);	1625	ev_stop (EV_A_ (W)w);
864	}	1626	}
865		1627
866	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
867	ev_signal_start (struct ev_signal *w)	1642	ev_signal_start (EV_P_ ev_signal *w)
868	{	1643	{
		1644	#if EV_MULTIPLICITY
		1645	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1646	#endif
869	if (ev_is_active (w))	1647	if (expect_false (ev_is_active (w)))
870	return;	1648	return;
871		1649
		1650	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1651
872	ev_start ((W)w, 1);	1652	ev_start (EV_A_ (W)w, 1);
873	array_needsize (signals, signalmax, w->signum, signals_init);	1653	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
874	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1654	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
875		1655
876	if (!w->next)	1656	if (!((WL)w)->next)
877	{	1657	{
		1658	#if _WIN32
		1659	signal (w->signum, sighandler);
		1660	#else
878	struct sigaction sa;	1661	struct sigaction sa;
879	sa.sa_handler = sighandler;	1662	sa.sa_handler = sighandler;
880	sigfillset (&sa.sa_mask);	1663	sigfillset (&sa.sa_mask);
881	sa.sa_flags = 0;	1664	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
882	sigaction (w->signum, &sa, 0);	1665	sigaction (w->signum, &sa, 0);
		1666	#endif
883	}	1667	}
884	}	1668	}
885		1669
886	void	1670	void
887	ev_signal_stop (struct ev_signal *w)	1671	ev_signal_stop (EV_P_ ev_signal *w)
888	{	1672	{
889	ev_clear ((W)w);	1673	ev_clear_pending (EV_A_ (W)w);
890	if (!ev_is_active (w))	1674	if (expect_false (!ev_is_active (w)))
891	return;	1675	return;
892		1676
893	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1677	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
894	ev_stop ((W)w);	1678	ev_stop (EV_A_ (W)w);
895		1679
896	if (!signals [w->signum - 1].head)	1680	if (!signals [w->signum - 1].head)
897	signal (w->signum, SIG_DFL);	1681	signal (w->signum, SIG_DFL);
898	}	1682	}
899		1683
900	void	1684	void
		1685	ev_child_start (EV_P_ ev_child *w)
		1686	{
		1687	#if EV_MULTIPLICITY
		1688	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1689	#endif
		1690	if (expect_false (ev_is_active (w)))
		1691	return;
		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 8192
		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) && strlen (w->path) < 4096)
		1734	{
		1735	char path [4096];
		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, mask);
		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	int slot;
		1765	int wd = w->wd;
		1766
		1767	if (wd < 0)
		1768	return;
		1769
		1770	w->wd = -2;
		1771	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1772	wlist_del (&fs_hash [slot].head, (WL)w);
		1773
		1774	/* remove this watcher, if others are watching it, they will rearm */
		1775	inotify_rm_watch (fs_fd, wd);
		1776	}
		1777
		1778	static void noinline
		1779	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1780	{
		1781	if (slot < 0)
		1782	/* overflow, need to check for all hahs slots */
		1783	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1784	infy_wd (EV_A_ slot, wd, ev);
		1785	else
		1786	{
		1787	WL w_;
		1788
		1789	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1790	{
		1791	ev_stat w = (ev_stat )w_;
		1792	w_ = w_->next; /* lets us remove this watcher and all before it */
		1793
		1794	if (w->wd == wd \|\| wd == -1)
		1795	{
		1796	if (ev->mask & (IN_IGNORED \| IN_UNMOUNT \| IN_DELETE_SELF))
		1797	{
		1798	w->wd = -1;
		1799	infy_add (EV_A_ w); /* re-add, no matter what */
		1800	}
		1801
		1802	stat_timer_cb (EV_A_ &w->timer, 0);
		1803	}
		1804	}
		1805	}
		1806	}
		1807
		1808	static void
		1809	infy_cb (EV_P_ ev_io *w, int revents)
		1810	{
		1811	char buf [EV_INOTIFY_BUFSIZE];
		1812	struct inotify_event ev = (struct inotify_event )buf;
		1813	int ofs;
		1814	int len = read (fs_fd, buf, sizeof (buf));
		1815
		1816	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1817	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1818	}
		1819
		1820	void inline_size
		1821	infy_init (EV_P)
		1822	{
		1823	if (fs_fd != -2)
		1824	return;
		1825
		1826	fs_fd = inotify_init ();
		1827
		1828	if (fs_fd >= 0)
		1829	{
		1830	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1831	ev_set_priority (&fs_w, EV_MAXPRI);
		1832	ev_io_start (EV_A_ &fs_w);
		1833	}
		1834	}
		1835
		1836	#endif
		1837
		1838	void
		1839	ev_stat_stat (EV_P_ ev_stat *w)
		1840	{
		1841	if (lstat (w->path, &w->attr) < 0)
		1842	w->attr.st_nlink = 0;
		1843	else if (!w->attr.st_nlink)
		1844	w->attr.st_nlink = 1;
		1845	}
		1846
		1847	void noinline
		1848	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1849	{
		1850	ev_stat w = (ev_stat )(((char *)w_) - offsetof (ev_stat, timer));
		1851
		1852	/* we copy this here each the time so that */
		1853	/* prev has the old value when the callback gets invoked */
		1854	w->prev = w->attr;
		1855	ev_stat_stat (EV_A_ w);
		1856
		1857	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
		1858	{
		1859	#if EV_USE_INOTIFY
		1860	infy_del (EV_A_ w);
		1861	infy_add (EV_A_ w);
		1862	ev_stat_stat (EV_A_ w); /* avoid race... */
		1863	#endif
		1864
		1865	ev_feed_event (EV_A_ w, EV_STAT);
		1866	}
		1867	}
		1868
		1869	void
		1870	ev_stat_start (EV_P_ ev_stat *w)
		1871	{
		1872	if (expect_false (ev_is_active (w)))
		1873	return;
		1874
		1875	/* since we use memcmp, we need to clear any padding data etc. */
		1876	memset (&w->prev, 0, sizeof (ev_statdata));
		1877	memset (&w->attr, 0, sizeof (ev_statdata));
		1878
		1879	ev_stat_stat (EV_A_ w);
		1880
		1881	if (w->interval < MIN_STAT_INTERVAL)
		1882	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		1883
		1884	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		1885	ev_set_priority (&w->timer, ev_priority (w));
		1886
		1887	#if EV_USE_INOTIFY
		1888	infy_init (EV_A);
		1889
		1890	if (fs_fd >= 0)
		1891	infy_add (EV_A_ w);
		1892	else
		1893	#endif
		1894	ev_timer_start (EV_A_ &w->timer);
		1895
		1896	ev_start (EV_A_ (W)w, 1);
		1897	}
		1898
		1899	void
		1900	ev_stat_stop (EV_P_ ev_stat *w)
		1901	{
		1902	ev_clear_pending (EV_A_ (W)w);
		1903	if (expect_false (!ev_is_active (w)))
		1904	return;
		1905
		1906	#if EV_USE_INOTIFY
		1907	infy_del (EV_A_ w);
		1908	#endif
		1909	ev_timer_stop (EV_A_ &w->timer);
		1910
		1911	ev_stop (EV_A_ (W)w);
		1912	}
		1913	#endif
		1914
		1915	void
901	ev_idle_start (struct ev_idle *w)	1916	ev_idle_start (EV_P_ ev_idle *w)
902	{	1917	{
903	if (ev_is_active (w))	1918	if (expect_false (ev_is_active (w)))
904	return;	1919	return;
905		1920
906	ev_start ((W)w, ++idlecnt);	1921	ev_start (EV_A_ (W)w, ++idlecnt);
907	array_needsize (idles, idlemax, idlecnt, );	1922	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
908	idles [idlecnt - 1] = w;	1923	idles [idlecnt - 1] = w;
909	}	1924	}
910		1925
911	void	1926	void
912	ev_idle_stop (struct ev_idle *w)	1927	ev_idle_stop (EV_P_ ev_idle *w)
913	{	1928	{
914	ev_clear ((W)w);	1929	ev_clear_pending (EV_A_ (W)w);
915	if (ev_is_active (w))	1930	if (expect_false (!ev_is_active (w)))
916	return;	1931	return;
917		1932
		1933	{
		1934	int active = ((W)w)->active;
918	idles [w->active - 1] = idles [--idlecnt];	1935	idles [active - 1] = idles [--idlecnt];
		1936	((W)idles [active - 1])->active = active;
		1937	}
		1938
919	ev_stop ((W)w);	1939	ev_stop (EV_A_ (W)w);
920	}	1940	}
921		1941
922	void	1942	void
923	ev_prepare_start (struct ev_prepare *w)	1943	ev_prepare_start (EV_P_ ev_prepare *w)
924	{	1944	{
925	if (ev_is_active (w))	1945	if (expect_false (ev_is_active (w)))
926	return;	1946	return;
927		1947
928	ev_start ((W)w, ++preparecnt);	1948	ev_start (EV_A_ (W)w, ++preparecnt);
929	array_needsize (prepares, preparemax, preparecnt, );	1949	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
930	prepares [preparecnt - 1] = w;	1950	prepares [preparecnt - 1] = w;
931	}	1951	}
932		1952
933	void	1953	void
934	ev_prepare_stop (struct ev_prepare *w)	1954	ev_prepare_stop (EV_P_ ev_prepare *w)
935	{	1955	{
936	ev_clear ((W)w);	1956	ev_clear_pending (EV_A_ (W)w);
937	if (ev_is_active (w))	1957	if (expect_false (!ev_is_active (w)))
938	return;	1958	return;
939		1959
		1960	{
		1961	int active = ((W)w)->active;
940	prepares [w->active - 1] = prepares [--preparecnt];	1962	prepares [active - 1] = prepares [--preparecnt];
		1963	((W)prepares [active - 1])->active = active;
		1964	}
		1965
941	ev_stop ((W)w);	1966	ev_stop (EV_A_ (W)w);
942	}	1967	}
943		1968
944	void	1969	void
945	ev_check_start (struct ev_check *w)	1970	ev_check_start (EV_P_ ev_check *w)
946	{	1971	{
947	if (ev_is_active (w))	1972	if (expect_false (ev_is_active (w)))
948	return;	1973	return;
949		1974
950	ev_start ((W)w, ++checkcnt);	1975	ev_start (EV_A_ (W)w, ++checkcnt);
951	array_needsize (checks, checkmax, checkcnt, );	1976	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
952	checks [checkcnt - 1] = w;	1977	checks [checkcnt - 1] = w;
953	}	1978	}
954		1979
955	void	1980	void
956	ev_check_stop (struct ev_check *w)	1981	ev_check_stop (EV_P_ ev_check *w)
957	{	1982	{
958	ev_clear ((W)w);	1983	ev_clear_pending (EV_A_ (W)w);
959	if (ev_is_active (w))	1984	if (expect_false (!ev_is_active (w)))
960	return;	1985	return;
961		1986
		1987	{
		1988	int active = ((W)w)->active;
962	checks [w->active - 1] = checks [--checkcnt];	1989	checks [active - 1] = checks [--checkcnt];
		1990	((W)checks [active - 1])->active = active;
		1991	}
		1992
963	ev_stop ((W)w);	1993	ev_stop (EV_A_ (W)w);
964	}	1994	}
965		1995
966	void	1996	#if EV_EMBED_ENABLE
967	ev_child_start (struct ev_child *w)	1997	void noinline
		1998	ev_embed_sweep (EV_P_ ev_embed *w)
968	{	1999	{
		2000	ev_loop (w->loop, EVLOOP_NONBLOCK);
		2001	}
		2002
		2003	static void
		2004	embed_cb (EV_P_ ev_io *io, int revents)
		2005	{
		2006	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
		2007
969	if (ev_is_active (w))	2008	if (ev_cb (w))
970	return;	2009	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2010	else
		2011	ev_embed_sweep (loop, w);
		2012	}
971		2013
		2014	void
		2015	ev_embed_start (EV_P_ ev_embed *w)
		2016	{
		2017	if (expect_false (ev_is_active (w)))
		2018	return;
		2019
		2020	{
		2021	struct ev_loop *loop = w->loop;
		2022	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2023	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		2024	}
		2025
		2026	ev_set_priority (&w->io, ev_priority (w));
		2027	ev_io_start (EV_A_ &w->io);
		2028
972	ev_start ((W)w, 1);	2029	ev_start (EV_A_ (W)w, 1);
973	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
974	}	2030	}
975		2031
976	void	2032	void
977	ev_child_stop (struct ev_child *w)	2033	ev_embed_stop (EV_P_ ev_embed *w)
978	{	2034	{
979	ev_clear ((W)w);	2035	ev_clear_pending (EV_A_ (W)w);
980	if (ev_is_active (w))	2036	if (expect_false (!ev_is_active (w)))
981	return;	2037	return;
982		2038
983	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2039	ev_io_stop (EV_A_ &w->io);
		2040
984	ev_stop ((W)w);	2041	ev_stop (EV_A_ (W)w);
985	}	2042	}
		2043	#endif
		2044
		2045	#if EV_FORK_ENABLE
		2046	void
		2047	ev_fork_start (EV_P_ ev_fork *w)
		2048	{
		2049	if (expect_false (ev_is_active (w)))
		2050	return;
		2051
		2052	ev_start (EV_A_ (W)w, ++forkcnt);
		2053	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2054	forks [forkcnt - 1] = w;
		2055	}
		2056
		2057	void
		2058	ev_fork_stop (EV_P_ ev_fork *w)
		2059	{
		2060	ev_clear_pending (EV_A_ (W)w);
		2061	if (expect_false (!ev_is_active (w)))
		2062	return;
		2063
		2064	{
		2065	int active = ((W)w)->active;
		2066	forks [active - 1] = forks [--forkcnt];
		2067	((W)forks [active - 1])->active = active;
		2068	}
		2069
		2070	ev_stop (EV_A_ (W)w);
		2071	}
		2072	#endif
986		2073
987	/*****************************************************************************/	2074	/*****************************************************************************/
988		2075
989	struct ev_once	2076	struct ev_once
990	{	2077	{
991	struct ev_io io;	2078	ev_io io;
992	struct ev_timer to;	2079	ev_timer to;
993	void (cb)(int revents, void arg);	2080	void (cb)(int revents, void arg);
994	void *arg;	2081	void *arg;
995	};	2082	};
996		2083
997	static void	2084	static void
998	once_cb (struct ev_once *once, int revents)	2085	once_cb (EV_P_ struct ev_once *once, int revents)
999	{	2086	{
1000	void (cb)(int revents, void arg) = once->cb;	2087	void (cb)(int revents, void arg) = once->cb;
1001	void *arg = once->arg;	2088	void *arg = once->arg;
1002		2089
1003	ev_io_stop (&once->io);	2090	ev_io_stop (EV_A_ &once->io);
1004	ev_timer_stop (&once->to);	2091	ev_timer_stop (EV_A_ &once->to);
1005	free (once);	2092	ev_free (once);
1006		2093
1007	cb (revents, arg);	2094	cb (revents, arg);
1008	}	2095	}
1009		2096
1010	static void	2097	static void
1011	once_cb_io (struct ev_io *w, int revents)	2098	once_cb_io (EV_P_ ev_io *w, int revents)
1012	{	2099	{
1013	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	2100	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1014	}	2101	}
1015		2102
1016	static void	2103	static void
1017	once_cb_to (struct ev_timer *w, int revents)	2104	once_cb_to (EV_P_ ev_timer *w, int revents)
1018	{	2105	{
1019	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	2106	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1020	}	2107	}
1021		2108
1022	void	2109	void
1023	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	2110	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1024	{	2111	{
1025	struct ev_once *once = malloc (sizeof (struct ev_once));	2112	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
1026		2113
1027	if (!once)	2114	if (expect_false (!once))
		2115	{
1028	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	2116	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1029	else	2117	return;
1030	{	2118	}
		2119
1031	once->cb = cb;	2120	once->cb = cb;
1032	once->arg = arg;	2121	once->arg = arg;
1033		2122
1034	ev_watcher_init (&once->io, once_cb_io);	2123	ev_init (&once->io, once_cb_io);
1035	if (fd >= 0)	2124	if (fd >= 0)
1036	{	2125	{
1037	ev_io_set (&once->io, fd, events);	2126	ev_io_set (&once->io, fd, events);
1038	ev_io_start (&once->io);	2127	ev_io_start (EV_A_ &once->io);
1039	}	2128	}
1040		2129
1041	ev_watcher_init (&once->to, once_cb_to);	2130	ev_init (&once->to, once_cb_to);
1042	if (timeout >= 0.)	2131	if (timeout >= 0.)
1043	{	2132	{
1044	ev_timer_set (&once->to, timeout, 0.);	2133	ev_timer_set (&once->to, timeout, 0.);
1045	ev_timer_start (&once->to);	2134	ev_timer_start (EV_A_ &once->to);
1046	}
1047	}
1048	}
1049
1050	/*****************************************************************************/
1051
1052	#if 0
1053
1054	struct ev_io wio;
1055
1056	static void
1057	sin_cb (struct ev_io *w, int revents)
1058	{
1059	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1060	}
1061
1062	static void
1063	ocb (struct ev_timer *w, int revents)
1064	{
1065	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1066	ev_timer_stop (w);
1067	ev_timer_start (w);
1068	}
1069
1070	static void
1071	scb (struct ev_signal *w, int revents)
1072	{
1073	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1074	ev_io_stop (&wio);
1075	ev_io_start (&wio);
1076	}
1077
1078	static void
1079	gcb (struct ev_signal *w, int revents)
1080	{
1081	fprintf (stderr, "generic %x\n", revents);
1082
1083	}
1084
1085	int main (void)
1086	{
1087	ev_init (0);
1088
1089	ev_io_init (&wio, sin_cb, 0, EV_READ);
1090	ev_io_start (&wio);
1091
1092	struct ev_timer t[10000];
1093
1094	#if 0
1095	int i;
1096	for (i = 0; i < 10000; ++i)
1097	{	2135	}
1098	struct ev_timer *w = t + i;
1099	ev_watcher_init (w, ocb, i);
1100	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1101	ev_timer_start (w);
1102	if (drand48 () < 0.5)
1103	ev_timer_stop (w);
1104	}
1105	#endif
1106
1107	struct ev_timer t1;
1108	ev_timer_init (&t1, ocb, 5, 10);
1109	ev_timer_start (&t1);
1110
1111	struct ev_signal sig;
1112	ev_signal_init (&sig, scb, SIGQUIT);
1113	ev_signal_start (&sig);
1114
1115	struct ev_check cw;
1116	ev_check_init (&cw, gcb);
1117	ev_check_start (&cw);
1118
1119	struct ev_idle iw;
1120	ev_idle_init (&iw, gcb);
1121	ev_idle_start (&iw);
1122
1123	ev_loop (0);
1124
1125	return 0;
1126	}	2136	}
1127		2137
		2138	#ifdef __cplusplus
		2139	}
1128	#endif	2140	#endif
1129		2141
1130
1131
1132

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Comparing libev/ev.c (file contents): Revision 1.31 by root, Thu Nov 1 09:05:33 2007 UTC vs. Revision 1.153 by root, Wed Nov 28 11:41:18 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.31 by root, Thu Nov 1 09:05:33 2007 UTC vs.
Revision 1.153 by root, Wed Nov 28 11:41:18 2007 UTC