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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 1.151 by root, Tue Nov 27 19:59:08 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
31	#endif	99	#endif
32		100
33	#include <math.h>	101	#include <math.h>
34	#include <stdlib.h>	102	#include <stdlib.h>
35	#include <unistd.h>
36	#include <fcntl.h>	103	#include <fcntl.h>
37	#include <signal.h>
38	#include <stddef.h>	104	#include <stddef.h>
39		105
40	#include <stdio.h>	106	#include <stdio.h>
41		107
42	#include <assert.h>	108	#include <assert.h>
43	#include <errno.h>	109	#include <errno.h>
44	#include <sys/types.h>	110	#include <sys/types.h>
45	#include <sys/wait.h>
46	#include <sys/time.h>
47	#include <time.h>	111	#include <time.h>
48		112
		113	#include <signal.h>
		114
		115	#ifndef _WIN32
		116	# include <sys/time.h>
		117	# include <sys/wait.h>
		118	# include <unistd.h>
		119	#else
		120	# define WIN32_LEAN_AND_MEAN
		121	# include <windows.h>
		122	# ifndef EV_SELECT_IS_WINSOCKET
		123	# define EV_SELECT_IS_WINSOCKET 1
		124	# endif
		125	#endif
		126
		127	/**/
		128
49	#ifndef EV_USE_MONOTONIC	129	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	130	# define EV_USE_MONOTONIC 0
52	# endif	131	#endif
		132
		133	#ifndef EV_USE_REALTIME
		134	# define EV_USE_REALTIME 0
53	#endif	135	#endif
54		136
55	#ifndef EV_USE_SELECT	137	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	138	# define EV_USE_SELECT 1
57	#endif	139	#endif
58		140
		141	#ifndef EV_USE_POLL
		142	# ifdef _WIN32
		143	# define EV_USE_POLL 0
		144	# else
		145	# define EV_USE_POLL 1
		146	# endif
		147	#endif
		148
59	#ifndef EV_USE_EPOLL	149	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	150	# define EV_USE_EPOLL 0
61	#endif	151	#endif
62		152
		153	#ifndef EV_USE_KQUEUE
		154	# define EV_USE_KQUEUE 0
		155	#endif
		156
		157	#ifndef EV_USE_PORT
		158	# define EV_USE_PORT 0
		159	#endif
		160
		161	#ifndef EV_PID_HASHSIZE
		162	# if EV_MINIMAL
		163	# define EV_PID_HASHSIZE 1
		164	# else
		165	# define EV_PID_HASHSIZE 16
		166	# endif
		167	#endif
		168
		169	/**/
		170
		171	#ifndef CLOCK_MONOTONIC
		172	# undef EV_USE_MONOTONIC
		173	# define EV_USE_MONOTONIC 0
		174	#endif
		175
63	#ifndef CLOCK_REALTIME	176	#ifndef CLOCK_REALTIME
		177	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	178	# define EV_USE_REALTIME 0
65	#endif	179	#endif
66	#ifndef EV_USE_REALTIME	180
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	181	#if EV_SELECT_IS_WINSOCKET
		182	# include <winsock.h>
68	#endif	183	#endif
		184
		185	/**/
69		186
70	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	187	#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) */	188	#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 */	189	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
74		190
		191	#ifdef EV_H
		192	# include EV_H
		193	#else
75	#include "ev.h"	194	# include "ev.h"
		195	#endif
76		196
		197	#if __GNUC__ >= 3
		198	# define expect(expr,value) __builtin_expect ((expr),(value))
		199	# define inline_size static inline /* inline for codesize */
		200	# if EV_MINIMAL
		201	# define noinline __attribute__ ((noinline))
		202	# define inline_speed static noinline
		203	# else
		204	# define noinline
		205	# define inline_speed static inline
		206	# endif
		207	#else
		208	# define expect(expr,value) (expr)
		209	# define inline_speed static
		210	# define inline_size static
		211	# define noinline
		212	#endif
		213
		214	#define expect_false(expr) expect ((expr) != 0, 0)
		215	#define expect_true(expr) expect ((expr) != 0, 1)
		216
		217	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		218	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		219
		220	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		221	#define EMPTY2(a,b) /* used to suppress some warnings */
		222
77	typedef struct ev_watcher *W;	223	typedef ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	224	typedef ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	225	typedef ev_watcher_time *WT;
80		226
81	static ev_tstamp now, diff; /* monotonic clock */	227	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		228
		229	#ifdef _WIN32
		230	# include "ev_win32.c"
		231	#endif
		232
		233	/*****************************************************************************/
		234
		235	static void (*syserr_cb)(const char *msg);
		236
		237	void
		238	ev_set_syserr_cb (void (*cb)(const char *msg))
		239	{
		240	syserr_cb = cb;
		241	}
		242
		243	static void noinline
		244	syserr (const char *msg)
		245	{
		246	if (!msg)
		247	msg = "(libev) system error";
		248
		249	if (syserr_cb)
		250	syserr_cb (msg);
		251	else
		252	{
		253	perror (msg);
		254	abort ();
		255	}
		256	}
		257
		258	static void *(*alloc)(void *ptr, size_t size) = realloc;
		259
		260	void
		261	ev_set_allocator (void *(*cb)(void *ptr, size_t size))
		262	{
		263	alloc = cb;
		264	}
		265
		266	inline_speed void *
		267	ev_realloc (void *ptr, size_t size)
		268	{
		269	ptr = alloc (ptr, size);
		270
		271	if (!ptr && size)
		272	{
		273	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", (long)size);
		274	abort ();
		275	}
		276
		277	return ptr;
		278	}
		279
		280	#define ev_malloc(size) ev_realloc (0, (size))
		281	#define ev_free(ptr) ev_realloc ((ptr), 0)
		282
		283	/*****************************************************************************/
		284
		285	typedef struct
		286	{
		287	WL head;
		288	unsigned char events;
		289	unsigned char reify;
		290	#if EV_SELECT_IS_WINSOCKET
		291	SOCKET handle;
		292	#endif
		293	} ANFD;
		294
		295	typedef struct
		296	{
		297	W w;
		298	int events;
		299	} ANPENDING;
		300
		301	#if EV_MULTIPLICITY
		302
		303	struct ev_loop
		304	{
		305	ev_tstamp ev_rt_now;
		306	#define ev_rt_now ((loop)->ev_rt_now)
		307	#define VAR(name,decl) decl;
		308	#include "ev_vars.h"
		309	#undef VAR
		310	};
		311	#include "ev_wrap.h"
		312
		313	static struct ev_loop default_loop_struct;
		314	struct ev_loop *ev_default_loop_ptr;
		315
		316	#else
		317
82	ev_tstamp ev_now;	318	ev_tstamp ev_rt_now;
83	int ev_method;	319	#define VAR(name,decl) static decl;
		320	#include "ev_vars.h"
		321	#undef VAR
84		322
85	static int have_monotonic; /* runtime */	323	static int ev_default_loop_ptr;
86		324
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	325	#endif
88	static void (*method_modify)(int fd, int oev, int nev);
89	static void (*method_poll)(ev_tstamp timeout);
90		326
91	/*****************************************************************************/	327	/*****************************************************************************/
92		328
93	ev_tstamp	329	ev_tstamp
94	ev_time (void)	330	ev_time (void)
…		…
102	gettimeofday (&tv, 0);	338	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	339	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	340	#endif
105	}	341	}
106		342
107	static ev_tstamp	343	ev_tstamp inline_size
108	get_clock (void)	344	get_clock (void)
109	{	345	{
110	#if EV_USE_MONOTONIC	346	#if EV_USE_MONOTONIC
111	if (have_monotonic)	347	if (expect_true (have_monotonic))
112	{	348	{
113	struct timespec ts;	349	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	350	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	351	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	352	}
117	#endif	353	#endif
118		354
119	return ev_time ();	355	return ev_time ();
120	}	356	}
121		357
		358	#if EV_MULTIPLICITY
		359	ev_tstamp
		360	ev_now (EV_P)
		361	{
		362	return ev_rt_now;
		363	}
		364	#endif
		365
122	#define array_roundsize(base,n) ((n) | 4 & ~3)	366	#define array_roundsize(type,n) (((n) | 4) & ~3)
123		367
124	#define array_needsize(base,cur,cnt,init) \	368	#define array_needsize(type,base,cur,cnt,init) \
125	if ((cnt) > cur) \	369	if (expect_false ((cnt) > cur)) \
126	{ \	370	{ \
127	int newcnt = cur; \	371	int newcnt = cur; \
128	do \	372	do \
129	{ \	373	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	374	newcnt = array_roundsize (type, newcnt << 1); \
131	} \	375	} \
132	while ((cnt) > newcnt); \	376	while ((cnt) > newcnt); \
133	\	377	\
134	base = realloc (base, sizeof (*base) * (newcnt)); \	378	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
135	init (base + cur, newcnt - cur); \	379	init (base + cur, newcnt - cur); \
136	cur = newcnt; \	380	cur = newcnt; \
137	}	381	}
		382
		383	#define array_slim(type,stem) \
		384	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		385	{ \
		386	stem ## max = array_roundsize (stem ## cnt >> 1); \
		387	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		388	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		389	}
		390
		391	#define array_free(stem, idx) \
		392	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
138		393
139	/*****************************************************************************/	394	/*****************************************************************************/
140		395
141	typedef struct	396	void noinline
		397	ev_feed_event (EV_P_ void *w, int revents)
142	{	398	{
143	struct ev_io *head;	399	W w_ = (W)w;
144	int events;
145	} ANFD;
146		400
147	static ANFD *anfds;	401	if (expect_false (w_->pending))
148	static int anfdmax;	402	{
		403	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		404	return;
		405	}
149		406
150	static void	407	w_->pending = ++pendingcnt [ABSPRI (w_)];
		408	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		409	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		410	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		411	}
		412
		413	void inline_size
		414	queue_events (EV_P_ W *events, int eventcnt, int type)
		415	{
		416	int i;
		417
		418	for (i = 0; i < eventcnt; ++i)
		419	ev_feed_event (EV_A_ events [i], type);
		420	}
		421
		422	/*****************************************************************************/
		423
		424	void inline_size
151	anfds_init (ANFD *base, int count)	425	anfds_init (ANFD *base, int count)
152	{	426	{
153	while (count--)	427	while (count--)
154	{	428	{
155	base->head = 0;	429	base->head = 0;
156	base->events = EV_NONE;	430	base->events = EV_NONE;
		431	base->reify = 0;
		432
157	++base;	433	++base;
158	}	434	}
159	}	435	}
160		436
161	typedef struct	437	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)	438	fd_event (EV_P_ int fd, int revents)
190	{	439	{
191	ANFD *anfd = anfds + fd;	440	ANFD *anfd = anfds + fd;
192	struct ev_io *w;	441	ev_io *w;
193		442
194	for (w = anfd->head; w; w = w->next)	443	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
195	{	444	{
196	int ev = w->events & events;	445	int ev = w->events & revents;
197		446
198	if (ev)	447	if (ev)
199	event ((W)w, ev);	448	ev_feed_event (EV_A_ (W)w, ev);
200	}	449	}
201	}	450	}
202		451
203	/*****************************************************************************/	452	void
		453	ev_feed_fd_event (EV_P_ int fd, int revents)
		454	{
		455	fd_event (EV_A_ fd, revents);
		456	}
204		457
205	static int *fdchanges;	458	void inline_size
206	static int fdchangemax, fdchangecnt;	459	fd_reify (EV_P)
207
208	static void
209	fd_reify (void)
210	{	460	{
211	int i;	461	int i;
212		462
213	for (i = 0; i < fdchangecnt; ++i)	463	for (i = 0; i < fdchangecnt; ++i)
214	{	464	{
215	int fd = fdchanges [i];	465	int fd = fdchanges [i];
216	ANFD *anfd = anfds + fd;	466	ANFD *anfd = anfds + fd;
217	struct ev_io *w;	467	ev_io *w;
218		468
219	int events = 0;	469	int events = 0;
220		470
221	for (w = anfd->head; w; w = w->next)	471	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
222	events |= w->events;	472	events |= w->events;
223		473
224	anfd->events &= ~EV_REIFY;	474	#if EV_SELECT_IS_WINSOCKET
225		475	if (events)
226	if (anfd->events != events)
227	{	476	{
228	method_modify (fd, anfd->events, events);	477	unsigned long argp;
229	anfd->events = events;	478	anfd->handle = _get_osfhandle (fd);
		479	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
230	}	480	}
		481	#endif
		482
		483	anfd->reify = 0;
		484
		485	backend_modify (EV_A_ fd, anfd->events, events);
		486	anfd->events = events;
231	}	487	}
232		488
233	fdchangecnt = 0;	489	fdchangecnt = 0;
234	}	490	}
235		491
236	static void	492	void inline_size
237	fd_change (int fd)	493	fd_change (EV_P_ int fd)
238	{	494	{
239	if (anfds [fd].events & EV_REIFY || fdchangecnt < 0)	495	if (expect_false (anfds [fd].reify))
240	return;	496	return;
241		497
242	anfds [fd].events |= EV_REIFY;	498	anfds [fd].reify = 1;
243		499
244	++fdchangecnt;	500	++fdchangecnt;
245	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	501	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
246	fdchanges [fdchangecnt - 1] = fd;	502	fdchanges [fdchangecnt - 1] = fd;
247	}	503	}
248		504
		505	void inline_speed
		506	fd_kill (EV_P_ int fd)
		507	{
		508	ev_io *w;
		509
		510	while ((w = (ev_io *)anfds [fd].head))
		511	{
		512	ev_io_stop (EV_A_ w);
		513	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		514	}
		515	}
		516
		517	int inline_size
		518	fd_valid (int fd)
		519	{
		520	#ifdef _WIN32
		521	return _get_osfhandle (fd) != -1;
		522	#else
		523	return fcntl (fd, F_GETFD) != -1;
		524	#endif
		525	}
		526
249	/* called on EBADF to verify fds */	527	/* called on EBADF to verify fds */
250	static void	528	static void noinline
251	fd_recheck (void)	529	fd_ebadf (EV_P)
252	{	530	{
253	int fd;	531	int fd;
254		532
255	for (fd = 0; fd < anfdmax; ++fd)	533	for (fd = 0; fd < anfdmax; ++fd)
256	if (anfds [fd].events)	534	if (anfds [fd].events)
257	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	535	if (!fd_valid (fd) == -1 && errno == EBADF)
258	while (anfds [fd].head)	536	fd_kill (EV_A_ fd);
		537	}
		538
		539	/* called on ENOMEM in select/poll to kill some fds and retry */
		540	static void noinline
		541	fd_enomem (EV_P)
		542	{
		543	int fd;
		544
		545	for (fd = anfdmax; fd--; )
		546	if (anfds [fd].events)
259	{	547	{
260	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT);	548	fd_kill (EV_A_ fd);
261	ev_io_stop (anfds [fd].head);	549	return;
262	}	550	}
		551	}
		552
		553	/* usually called after fork if backend needs to re-arm all fds from scratch */
		554	static void noinline
		555	fd_rearm_all (EV_P)
		556	{
		557	int fd;
		558
		559	/* this should be highly optimised to not do anything but set a flag */
		560	for (fd = 0; fd < anfdmax; ++fd)
		561	if (anfds [fd].events)
		562	{
		563	anfds [fd].events = 0;
		564	fd_change (EV_A_ fd);
		565	}
263	}	566	}
264		567
265	/*****************************************************************************/	568	/*****************************************************************************/
266		569
267	static struct ev_timer **timers;	570	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)	571	upheap (WT *heap, int k)
275	{	572	{
276	WT w = timers [k];	573	WT w = heap [k];
277		574
278	while (k && timers [k >> 1]->at > w->at)	575	while (k && heap [k >> 1]->at > w->at)
279	{	576	{
280	timers [k] = timers [k >> 1];	577	heap [k] = heap [k >> 1];
281	timers [k]->active = k + 1;	578	((W)heap [k])->active = k + 1;
282	k >>= 1;	579	k >>= 1;
283	}	580	}
284		581
285	timers [k] = w;	582	heap [k] = w;
286	timers [k]->active = k + 1;	583	((W)heap [k])->active = k + 1;
287		584
288	}	585	}
289		586
290	static void	587	void inline_speed
291	downheap (WT *timers, int N, int k)	588	downheap (WT *heap, int N, int k)
292	{	589	{
293	WT w = timers [k];	590	WT w = heap [k];
294		591
295	while (k < (N >> 1))	592	while (k < (N >> 1))
296	{	593	{
297	int j = k << 1;	594	int j = k << 1;
298		595
299	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	596	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
300	++j;	597	++j;
301		598
302	if (w->at <= timers [j]->at)	599	if (w->at <= heap [j]->at)
303	break;	600	break;
304		601
305	timers [k] = timers [j];	602	heap [k] = heap [j];
306	timers [k]->active = k + 1;	603	((W)heap [k])->active = k + 1;
307	k = j;	604	k = j;
308	}	605	}
309		606
310	timers [k] = w;	607	heap [k] = w;
311	timers [k]->active = k + 1;	608	((W)heap [k])->active = k + 1;
		609	}
		610
		611	void inline_size
		612	adjustheap (WT *heap, int N, int k)
		613	{
		614	upheap (heap, k);
		615	downheap (heap, N, k);
312	}	616	}
313		617
314	/*****************************************************************************/	618	/*****************************************************************************/
315		619
316	typedef struct	620	typedef struct
317	{	621	{
318	struct ev_signal *head;	622	WL head;
319	sig_atomic_t gotsig;	623	sig_atomic_t volatile gotsig;
320	} ANSIG;	624	} ANSIG;
321		625
322	static ANSIG *signals;	626	static ANSIG *signals;
323	static int signalmax;	627	static int signalmax;
324		628
325	static int sigpipe [2];	629	static int sigpipe [2];
326	static sig_atomic_t gotsig;	630	static sig_atomic_t volatile gotsig;
327	static struct ev_io sigev;	631	static ev_io sigev;
328		632
329	static void	633	void inline_size
330	signals_init (ANSIG *base, int count)	634	signals_init (ANSIG *base, int count)
331	{	635	{
332	while (count--)	636	while (count--)
333	{	637	{
334	base->head = 0;	638	base->head = 0;
335	base->gotsig = 0;	639	base->gotsig = 0;
		640
336	++base;	641	++base;
337	}	642	}
338	}	643	}
339		644
340	static void	645	static void
341	sighandler (int signum)	646	sighandler (int signum)
342	{	647	{
		648	#if _WIN32
		649	signal (signum, sighandler);
		650	#endif
		651
343	signals [signum - 1].gotsig = 1;	652	signals [signum - 1].gotsig = 1;
344		653
345	if (!gotsig)	654	if (!gotsig)
346	{	655	{
		656	int old_errno = errno;
347	gotsig = 1;	657	gotsig = 1;
348	write (sigpipe [1], &gotsig, 1);	658	write (sigpipe [1], &signum, 1);
		659	errno = old_errno;
349	}	660	}
		661	}
		662
		663	void noinline
		664	ev_feed_signal_event (EV_P_ int signum)
		665	{
		666	WL w;
		667
		668	#if EV_MULTIPLICITY
		669	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		670	#endif
		671
		672	--signum;
		673
		674	if (signum < 0 || signum >= signalmax)
		675	return;
		676
		677	signals [signum].gotsig = 0;
		678
		679	for (w = signals [signum].head; w; w = w->next)
		680	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
350	}	681	}
351		682
352	static void	683	static void
353	sigcb (struct ev_io *iow, int revents)	684	sigcb (EV_P_ ev_io *iow, int revents)
354	{	685	{
355	struct ev_signal *w;
356	int sig;	686	int signum;
357		687
		688	read (sigpipe [0], &revents, 1);
358	gotsig = 0;	689	gotsig = 0;
359	read (sigpipe [0], &revents, 1);
360		690
361	for (sig = signalmax; sig--; )	691	for (signum = signalmax; signum--; )
362	if (signals [sig].gotsig)	692	if (signals [signum].gotsig)
		693	ev_feed_signal_event (EV_A_ signum + 1);
		694	}
		695
		696	void inline_size
		697	fd_intern (int fd)
		698	{
		699	#ifdef _WIN32
		700	int arg = 1;
		701	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		702	#else
		703	fcntl (fd, F_SETFD, FD_CLOEXEC);
		704	fcntl (fd, F_SETFL, O_NONBLOCK);
		705	#endif
		706	}
		707
		708	static void noinline
		709	siginit (EV_P)
		710	{
		711	fd_intern (sigpipe [0]);
		712	fd_intern (sigpipe [1]);
		713
		714	ev_io_set (&sigev, sigpipe [0], EV_READ);
		715	ev_io_start (EV_A_ &sigev);
		716	ev_unref (EV_A); /* child watcher should not keep loop alive */
		717	}
		718
		719	/*****************************************************************************/
		720
		721	static ev_child *childs [EV_PID_HASHSIZE];
		722
		723	#ifndef _WIN32
		724
		725	static ev_signal childev;
		726
		727	void inline_speed
		728	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		729	{
		730	ev_child *w;
		731
		732	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		733	if (w->pid == pid || !w->pid)
363	{	734	{
364	signals [sig].gotsig = 0;	735	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
365		736	w->rpid = pid;
366	for (w = signals [sig].head; w; w = w->next)	737	w->rstatus = status;
367	event ((W)w, EV_SIGNAL);	738	ev_feed_event (EV_A_ (W)w, EV_CHILD);
368	}	739	}
369	}	740	}
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		741
401	#ifndef WCONTINUED	742	#ifndef WCONTINUED
402	# define WCONTINUED 0	743	# define WCONTINUED 0
403	#endif	744	#endif
404		745
405	static void	746	static void
406	childcb (struct ev_signal *sw, int revents)	747	childcb (EV_P_ ev_signal *sw, int revents)
407	{	748	{
408	struct ev_child *w;
409	int pid, status;	749	int pid, status;
410		750
		751	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
411	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	752	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
412	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	753	if (!WCONTINUED
413	if (w->pid == pid || w->pid == -1)	754	|| errno != EINVAL
414	{	755	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
415	w->status = status;	756	return;
416	event ((W)w, EV_CHILD);	757
417	}	758	/* make sure we are called again until all childs have been reaped */
		759	/* we need to do it this way so that the callback gets called before we continue */
		760	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		761
		762	child_reap (EV_A_ sw, pid, pid, status);
		763	if (EV_PID_HASHSIZE > 1)
		764	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
418	}	765	}
		766
		767	#endif
419		768
420	/*****************************************************************************/	769	/*****************************************************************************/
421		770
		771	#if EV_USE_PORT
		772	# include "ev_port.c"
		773	#endif
		774	#if EV_USE_KQUEUE
		775	# include "ev_kqueue.c"
		776	#endif
422	#if EV_USE_EPOLL	777	#if EV_USE_EPOLL
423	# include "ev_epoll.c"	778	# include "ev_epoll.c"
424	#endif	779	#endif
		780	#if EV_USE_POLL
		781	# include "ev_poll.c"
		782	#endif
425	#if EV_USE_SELECT	783	#if EV_USE_SELECT
426	# include "ev_select.c"	784	# include "ev_select.c"
427	#endif	785	#endif
428		786
429	int	787	int
…		…
436	ev_version_minor (void)	794	ev_version_minor (void)
437	{	795	{
438	return EV_VERSION_MINOR;	796	return EV_VERSION_MINOR;
439	}	797	}
440		798
441	int ev_init (int flags)	799	/* return true if we are running with elevated privileges and should ignore env variables */
		800	int inline_size
		801	enable_secure (void)
442	{	802	{
443	if (!ev_method)	803	#ifdef _WIN32
		804	return 0;
		805	#else
		806	return getuid () != geteuid ()
		807	|| getgid () != getegid ();
		808	#endif
		809	}
		810
		811	unsigned int
		812	ev_supported_backends (void)
		813	{
		814	unsigned int flags = 0;
		815
		816	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		817	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		818	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		819	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		820	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		821
		822	return flags;
		823	}
		824
		825	unsigned int
		826	ev_recommended_backends (void)
		827	{
		828	unsigned int flags = ev_supported_backends ();
		829
		830	#ifndef __NetBSD__
		831	/* kqueue is borked on everything but netbsd apparently */
		832	/* it usually doesn't work correctly on anything but sockets and pipes */
		833	flags &= ~EVBACKEND_KQUEUE;
		834	#endif
		835	#ifdef __APPLE__
		836	// flags &= ~EVBACKEND_KQUEUE; for documentation
		837	flags &= ~EVBACKEND_POLL;
		838	#endif
		839
		840	return flags;
		841	}
		842
		843	unsigned int
		844	ev_embeddable_backends (void)
		845	{
		846	return EVBACKEND_EPOLL
		847	| EVBACKEND_KQUEUE
		848	| EVBACKEND_PORT;
		849	}
		850
		851	unsigned int
		852	ev_backend (EV_P)
		853	{
		854	return backend;
		855	}
		856
		857	static void noinline
		858	loop_init (EV_P_ unsigned int flags)
		859	{
		860	if (!backend)
444	{	861	{
445	#if EV_USE_MONOTONIC	862	#if EV_USE_MONOTONIC
446	{	863	{
447	struct timespec ts;	864	struct timespec ts;
448	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	865	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
449	have_monotonic = 1;	866	have_monotonic = 1;
450	}	867	}
451	#endif	868	#endif
452		869
453	ev_now = ev_time ();	870	ev_rt_now = ev_time ();
454	now = get_clock ();	871	mn_now = get_clock ();
		872	now_floor = mn_now;
455	diff = ev_now - now;	873	rtmn_diff = ev_rt_now - mn_now;
456		874
457	if (pipe (sigpipe))	875	if (!(flags & EVFLAG_NOENV)
458	return 0;	876	&& !enable_secure ()
		877	&& getenv ("LIBEV_FLAGS"))
		878	flags = atoi (getenv ("LIBEV_FLAGS"));
459		879
460	ev_method = EVMETHOD_NONE;	880	if (!(flags & 0x0000ffffUL))
		881	flags |= ev_recommended_backends ();
		882
		883	backend = 0;
		884	#if EV_USE_PORT
		885	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		886	#endif
		887	#if EV_USE_KQUEUE
		888	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		889	#endif
461	#if EV_USE_EPOLL	890	#if EV_USE_EPOLL
462	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	891	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		892	#endif
		893	#if EV_USE_POLL
		894	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
463	#endif	895	#endif
464	#if EV_USE_SELECT	896	#if EV_USE_SELECT
465	if (ev_method == EVMETHOD_NONE) select_init (flags);	897	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
466	#endif	898	#endif
467		899
468	if (ev_method)	900	ev_init (&sigev, sigcb);
		901	ev_set_priority (&sigev, EV_MAXPRI);
		902	}
		903	}
		904
		905	static void noinline
		906	loop_destroy (EV_P)
		907	{
		908	int i;
		909
		910	#if EV_USE_PORT
		911	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		912	#endif
		913	#if EV_USE_KQUEUE
		914	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		915	#endif
		916	#if EV_USE_EPOLL
		917	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		918	#endif
		919	#if EV_USE_POLL
		920	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		921	#endif
		922	#if EV_USE_SELECT
		923	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		924	#endif
		925
		926	for (i = NUMPRI; i--; )
		927	array_free (pending, [i]);
		928
		929	/* have to use the microsoft-never-gets-it-right macro */
		930	array_free (fdchange, EMPTY0);
		931	array_free (timer, EMPTY0);
		932	#if EV_PERIODIC_ENABLE
		933	array_free (periodic, EMPTY0);
		934	#endif
		935	array_free (idle, EMPTY0);
		936	array_free (prepare, EMPTY0);
		937	array_free (check, EMPTY0);
		938
		939	backend = 0;
		940	}
		941
		942	void inline_size
		943	loop_fork (EV_P)
		944	{
		945	#if EV_USE_PORT
		946	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		947	#endif
		948	#if EV_USE_KQUEUE
		949	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		950	#endif
		951	#if EV_USE_EPOLL
		952	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		953	#endif
		954
		955	if (ev_is_active (&sigev))
		956	{
		957	/* default loop */
		958
		959	ev_ref (EV_A);
		960	ev_io_stop (EV_A_ &sigev);
		961	close (sigpipe [0]);
		962	close (sigpipe [1]);
		963
		964	while (pipe (sigpipe))
		965	syserr ("(libev) error creating pipe");
		966
		967	siginit (EV_A);
		968	}
		969
		970	postfork = 0;
		971	}
		972
		973	#if EV_MULTIPLICITY
		974	struct ev_loop *
		975	ev_loop_new (unsigned int flags)
		976	{
		977	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		978
		979	memset (loop, 0, sizeof (struct ev_loop));
		980
		981	loop_init (EV_A_ flags);
		982
		983	if (ev_backend (EV_A))
		984	return loop;
		985
		986	return 0;
		987	}
		988
		989	void
		990	ev_loop_destroy (EV_P)
		991	{
		992	loop_destroy (EV_A);
		993	ev_free (loop);
		994	}
		995
		996	void
		997	ev_loop_fork (EV_P)
		998	{
		999	postfork = 1;
		1000	}
		1001
		1002	#endif
		1003
		1004	#if EV_MULTIPLICITY
		1005	struct ev_loop *
		1006	ev_default_loop_init (unsigned int flags)
		1007	#else
		1008	int
		1009	ev_default_loop (unsigned int flags)
		1010	#endif
		1011	{
		1012	if (sigpipe [0] == sigpipe [1])
		1013	if (pipe (sigpipe))
		1014	return 0;
		1015
		1016	if (!ev_default_loop_ptr)
		1017	{
		1018	#if EV_MULTIPLICITY
		1019	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1020	#else
		1021	ev_default_loop_ptr = 1;
		1022	#endif
		1023
		1024	loop_init (EV_A_ flags);
		1025
		1026	if (ev_backend (EV_A))
469	{	1027	{
470	ev_watcher_init (&sigev, sigcb);
471	siginit ();	1028	siginit (EV_A);
472		1029
		1030	#ifndef _WIN32
473	ev_signal_init (&childev, childcb, SIGCHLD);	1031	ev_signal_init (&childev, childcb, SIGCHLD);
		1032	ev_set_priority (&childev, EV_MAXPRI);
474	ev_signal_start (&childev);	1033	ev_signal_start (EV_A_ &childev);
		1034	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1035	#endif
475	}	1036	}
		1037	else
		1038	ev_default_loop_ptr = 0;
476	}	1039	}
477		1040
478	return ev_method;	1041	return ev_default_loop_ptr;
		1042	}
		1043
		1044	void
		1045	ev_default_destroy (void)
		1046	{
		1047	#if EV_MULTIPLICITY
		1048	struct ev_loop *loop = ev_default_loop_ptr;
		1049	#endif
		1050
		1051	#ifndef _WIN32
		1052	ev_ref (EV_A); /* child watcher */
		1053	ev_signal_stop (EV_A_ &childev);
		1054	#endif
		1055
		1056	ev_ref (EV_A); /* signal watcher */
		1057	ev_io_stop (EV_A_ &sigev);
		1058
		1059	close (sigpipe [0]); sigpipe [0] = 0;
		1060	close (sigpipe [1]); sigpipe [1] = 0;
		1061
		1062	loop_destroy (EV_A);
		1063	}
		1064
		1065	void
		1066	ev_default_fork (void)
		1067	{
		1068	#if EV_MULTIPLICITY
		1069	struct ev_loop *loop = ev_default_loop_ptr;
		1070	#endif
		1071
		1072	if (backend)
		1073	postfork = 1;
479	}	1074	}
480		1075
481	/*****************************************************************************/	1076	/*****************************************************************************/
482		1077
483	void	1078	int inline_size
484	ev_prefork (void)	1079	any_pending (EV_P)
485	{	1080	{
486	/* nop */	1081	int pri;
487	}
488		1082
489	void	1083	for (pri = NUMPRI; pri--; )
490	ev_postfork_parent (void)	1084	if (pendingcnt [pri])
491	{	1085	return 1;
492	/* nop */
493	}
494		1086
495	void	1087	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	}	1088	}
509		1089
510	/*****************************************************************************/	1090	void inline_speed
511
512	static void
513	call_pending (void)	1091	call_pending (EV_P)
514	{	1092	{
		1093	int pri;
		1094
		1095	for (pri = NUMPRI; pri--; )
515	while (pendingcnt)	1096	while (pendingcnt [pri])
516	{	1097	{
517	ANPENDING *p = pendings + --pendingcnt;	1098	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
518		1099
519	if (p->w)	1100	if (expect_true (p->w))
520	{	1101	{
		1102	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1103
521	p->w->pending = 0;	1104	p->w->pending = 0;
522	p->w->cb (p->w, p->events);	1105	EV_CB_INVOKE (p->w, p->events);
523	}	1106	}
524	}	1107	}
525	}	1108	}
526		1109
527	static void	1110	void inline_size
528	timers_reify (void)	1111	timers_reify (EV_P)
529	{	1112	{
530	while (timercnt && timers [0]->at <= now)	1113	while (timercnt && ((WT)timers [0])->at <= mn_now)
531	{	1114	{
532	struct ev_timer *w = timers [0];	1115	ev_timer *w = timers [0];
		1116
		1117	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
533		1118
534	/* first reschedule or stop timer */	1119	/* first reschedule or stop timer */
535	if (w->repeat)	1120	if (w->repeat)
536	{	1121	{
		1122	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1123
537	w->at = now + w->repeat;	1124	((WT)w)->at += w->repeat;
538	assert (("timer timeout in the past, negative repeat?", w->at > now));	1125	if (((WT)w)->at < mn_now)
		1126	((WT)w)->at = mn_now;
		1127
539	downheap ((WT *)timers, timercnt, 0);	1128	downheap ((WT *)timers, timercnt, 0);
540	}	1129	}
541	else	1130	else
542	ev_timer_stop (w); /* nonrepeating: stop timer */	1131	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
543		1132
544	event ((W)w, EV_TIMEOUT);	1133	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
545	}	1134	}
546	}	1135	}
547		1136
548	static void	1137	#if EV_PERIODIC_ENABLE
		1138	void inline_size
549	periodics_reify (void)	1139	periodics_reify (EV_P)
550	{	1140	{
551	while (periodiccnt && periodics [0]->at <= ev_now)	1141	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
552	{	1142	{
553	struct ev_periodic *w = periodics [0];	1143	ev_periodic *w = periodics [0];
		1144
		1145	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
554		1146
555	/* first reschedule or stop timer */	1147	/* first reschedule or stop timer */
556	if (w->interval)	1148	if (w->reschedule_cb)
557	{	1149	{
		1150	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1151	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1152	downheap ((WT *)periodics, periodiccnt, 0);
		1153	}
		1154	else if (w->interval)
		1155	{
558	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1156	((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));	1157	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);	1158	downheap ((WT *)periodics, periodiccnt, 0);
561	}	1159	}
562	else	1160	else
563	ev_periodic_stop (w); /* nonrepeating: stop timer */	1161	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
564		1162
565	event ((W)w, EV_TIMEOUT);	1163	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
566	}	1164	}
567	}	1165	}
568		1166
569	static void	1167	static void noinline
570	periodics_reschedule (ev_tstamp diff)	1168	periodics_reschedule (EV_P)
571	{	1169	{
572	int i;	1170	int i;
573		1171
574	/* adjust periodics after time jump */	1172	/* adjust periodics after time jump */
575	for (i = 0; i < periodiccnt; ++i)	1173	for (i = 0; i < periodiccnt; ++i)
576	{	1174	{
577	struct ev_periodic *w = periodics [i];	1175	ev_periodic *w = periodics [i];
578		1176
		1177	if (w->reschedule_cb)
		1178	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
579	if (w->interval)	1179	else if (w->interval)
		1180	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1181	}
		1182
		1183	/* now rebuild the heap */
		1184	for (i = periodiccnt >> 1; i--; )
		1185	downheap ((WT *)periodics, periodiccnt, i);
		1186	}
		1187	#endif
		1188
		1189	int inline_size
		1190	time_update_monotonic (EV_P)
		1191	{
		1192	mn_now = get_clock ();
		1193
		1194	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1195	{
		1196	ev_rt_now = rtmn_diff + mn_now;
		1197	return 0;
		1198	}
		1199	else
		1200	{
		1201	now_floor = mn_now;
		1202	ev_rt_now = ev_time ();
		1203	return 1;
		1204	}
		1205	}
		1206
		1207	void inline_size
		1208	time_update (EV_P)
		1209	{
		1210	int i;
		1211
		1212	#if EV_USE_MONOTONIC
		1213	if (expect_true (have_monotonic))
		1214	{
		1215	if (time_update_monotonic (EV_A))
580	{	1216	{
581	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1217	ev_tstamp odiff = rtmn_diff;
582		1218
583	if (fabs (diff) >= 1e-4)	1219	/* loop a few times, before making important decisions.
		1220	* on the choice of "4": one iteration isn't enough,
		1221	* in case we get preempted during the calls to
		1222	* ev_time and get_clock. a second call is almost guarenteed
		1223	* to succeed in that case, though. and looping a few more times
		1224	* doesn't hurt either as we only do this on time-jumps or
		1225	* in the unlikely event of getting preempted here.
		1226	*/
		1227	for (i = 4; --i; )
584	{	1228	{
585	ev_periodic_stop (w);	1229	rtmn_diff = ev_rt_now - mn_now;
586	ev_periodic_start (w);
587		1230
588	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1231	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1232	return; /* all is well */
		1233
		1234	ev_rt_now = ev_time ();
		1235	mn_now = get_clock ();
		1236	now_floor = mn_now;
589	}	1237	}
		1238
		1239	# if EV_PERIODIC_ENABLE
		1240	periodics_reschedule (EV_A);
		1241	# endif
		1242	/* no timer adjustment, as the monotonic clock doesn't jump */
		1243	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
590	}	1244	}
591	}	1245	}
592	}	1246	else
593		1247	#endif
594	static void	1248	{
595	time_update (void)
596	{
597	int i;
598
599	ev_now = ev_time ();	1249	ev_rt_now = ev_time ();
600		1250
601	if (have_monotonic)	1251	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	{	1252	{
607	now = get_clock ();	1253	#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);	1254	periodics_reschedule (EV_A);
		1255	#endif
624		1256
625	/* adjust timers. this is easy, as the offset is the same for all */	1257	/* adjust timers. this is easy, as the offset is the same for all */
626	for (i = 0; i < timercnt; ++i)	1258	for (i = 0; i < timercnt; ++i)
627	timers [i]->at += diff;	1259	((WT)timers [i])->at += ev_rt_now - mn_now;
628	}	1260	}
629		1261
630	now = ev_now;	1262	mn_now = ev_rt_now;
631	}	1263	}
632	}	1264	}
633		1265
634	int ev_loop_done;	1266	void
		1267	ev_ref (EV_P)
		1268	{
		1269	++activecnt;
		1270	}
635		1271
		1272	void
		1273	ev_unref (EV_P)
		1274	{
		1275	--activecnt;
		1276	}
		1277
		1278	static int loop_done;
		1279
		1280	void
636	void ev_loop (int flags)	1281	ev_loop (EV_P_ int flags)
637	{	1282	{
638	double block;
639	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1283	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1284	? EVUNLOOP_ONE
		1285	: EVUNLOOP_CANCEL;
640		1286
641	do	1287	while (activecnt)
642	{	1288	{
		1289	/* we might have forked, so reify kernel state if necessary */
		1290	#if EV_FORK_ENABLE
		1291	if (expect_false (postfork))
		1292	if (forkcnt)
		1293	{
		1294	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1295	call_pending (EV_A);
		1296	}
		1297	#endif
		1298
643	/* queue check watchers (and execute them) */	1299	/* queue check watchers (and execute them) */
644	if (preparecnt)	1300	if (expect_false (preparecnt))
645	{	1301	{
646	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1302	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
647	call_pending ();	1303	call_pending (EV_A);
648	}	1304	}
649		1305
		1306	/* we might have forked, so reify kernel state if necessary */
		1307	if (expect_false (postfork))
		1308	loop_fork (EV_A);
		1309
650	/* update fd-related kernel structures */	1310	/* update fd-related kernel structures */
651	fd_reify ();	1311	fd_reify (EV_A);
652		1312
653	/* calculate blocking time */	1313	/* calculate blocking time */
		1314	{
		1315	double block;
654		1316
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)	1317	if (flags & EVLOOP_NONBLOCK || idlecnt)
660	block = 0.;	1318	block = 0.; /* do not block at all */
661	else	1319	else
662	{	1320	{
		1321	/* update time to cancel out callback processing overhead */
		1322	#if EV_USE_MONOTONIC
		1323	if (expect_true (have_monotonic))
		1324	time_update_monotonic (EV_A);
		1325	else
		1326	#endif
		1327	{
		1328	ev_rt_now = ev_time ();
		1329	mn_now = ev_rt_now;
		1330	}
		1331
663	block = MAX_BLOCKTIME;	1332	block = MAX_BLOCKTIME;
664		1333
665	if (timercnt)	1334	if (timercnt)
666	{	1335	{
667	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1336	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
668	if (block > to) block = to;	1337	if (block > to) block = to;
669	}	1338	}
670		1339
		1340	#if EV_PERIODIC_ENABLE
671	if (periodiccnt)	1341	if (periodiccnt)
672	{	1342	{
673	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1343	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
674	if (block > to) block = to;	1344	if (block > to) block = to;
675	}	1345	}
		1346	#endif
676		1347
677	if (block < 0.) block = 0.;	1348	if (expect_false (block < 0.)) block = 0.;
678	}	1349	}
679		1350
680	method_poll (block);	1351	backend_poll (EV_A_ block);
		1352	}
681		1353
682	/* update ev_now, do magic */	1354	/* update ev_rt_now, do magic */
683	time_update ();	1355	time_update (EV_A);
684		1356
685	/* queue pending timers and reschedule them */	1357	/* queue pending timers and reschedule them */
686	timers_reify (); /* relative timers called last */	1358	timers_reify (EV_A); /* relative timers called last */
		1359	#if EV_PERIODIC_ENABLE
687	periodics_reify (); /* absolute timers called first */	1360	periodics_reify (EV_A); /* absolute timers called first */
		1361	#endif
688		1362
689	/* queue idle watchers unless io or timers are pending */	1363	/* queue idle watchers unless other events are pending */
690	if (!pendingcnt)	1364	if (idlecnt && !any_pending (EV_A))
691	queue_events ((W *)idles, idlecnt, EV_IDLE);	1365	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
692		1366
693	/* queue check watchers, to be executed first */	1367	/* queue check watchers, to be executed first */
694	if (checkcnt)	1368	if (expect_false (checkcnt))
695	queue_events ((W *)checks, checkcnt, EV_CHECK);	1369	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
696		1370
697	call_pending ();	1371	call_pending (EV_A);
698	}
699	while (!ev_loop_done);
700		1372
701	if (ev_loop_done != 2)	1373	if (expect_false (loop_done))
		1374	break;
		1375	}
		1376
		1377	if (loop_done == EVUNLOOP_ONE)
		1378	loop_done = EVUNLOOP_CANCEL;
		1379	}
		1380
		1381	void
		1382	ev_unloop (EV_P_ int how)
		1383	{
702	ev_loop_done = 0;	1384	loop_done = how;
703	}	1385	}
704		1386
705	/*****************************************************************************/	1387	/*****************************************************************************/
706		1388
707	static void	1389	void inline_size
708	wlist_add (WL *head, WL elem)	1390	wlist_add (WL *head, WL elem)
709	{	1391	{
710	elem->next = *head;	1392	elem->next = *head;
711	*head = elem;	1393	*head = elem;
712	}	1394	}
713		1395
714	static void	1396	void inline_size
715	wlist_del (WL *head, WL elem)	1397	wlist_del (WL *head, WL elem)
716	{	1398	{
717	while (*head)	1399	while (*head)
718	{	1400	{
719	if (*head == elem)	1401	if (*head == elem)
…		…
724		1406
725	head = &(*head)->next;	1407	head = &(*head)->next;
726	}	1408	}
727	}	1409	}
728		1410
729	static void	1411	void inline_speed
730	ev_clear (W w)	1412	ev_clear_pending (EV_P_ W w)
731	{	1413	{
732	if (w->pending)	1414	if (w->pending)
733	{	1415	{
734	pendings [w->pending - 1].w = 0;	1416	pendings [ABSPRI (w)][w->pending - 1].w = 0;
735	w->pending = 0;	1417	w->pending = 0;
736	}	1418	}
737	}	1419	}
738		1420
739	static void	1421	void inline_speed
740	ev_start (W w, int active)	1422	ev_start (EV_P_ W w, int active)
741	{	1423	{
		1424	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1425	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1426
742	w->active = active;	1427	w->active = active;
		1428	ev_ref (EV_A);
743	}	1429	}
744		1430
745	static void	1431	void inline_size
746	ev_stop (W w)	1432	ev_stop (EV_P_ W w)
747	{	1433	{
		1434	ev_unref (EV_A);
748	w->active = 0;	1435	w->active = 0;
749	}	1436	}
750		1437
751	/*****************************************************************************/	1438	/*****************************************************************************/
752		1439
753	void	1440	void
754	ev_io_start (struct ev_io *w)	1441	ev_io_start (EV_P_ ev_io *w)
755	{	1442	{
756	if (ev_is_active (w))
757	return;
758
759	int fd = w->fd;	1443	int fd = w->fd;
760		1444
		1445	if (expect_false (ev_is_active (w)))
		1446	return;
		1447
		1448	assert (("ev_io_start called with negative fd", fd >= 0));
		1449
761	ev_start ((W)w, 1);	1450	ev_start (EV_A_ (W)w, 1);
762	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1451	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
763	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1452	wlist_add ((WL *)&anfds[fd].head, (WL)w);
764		1453
765	fd_change (fd);	1454	fd_change (EV_A_ fd);
766	}	1455	}
767		1456
768	void	1457	void
769	ev_io_stop (struct ev_io *w)	1458	ev_io_stop (EV_P_ ev_io *w)
770	{	1459	{
771	ev_clear ((W)w);	1460	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1461	if (expect_false (!ev_is_active (w)))
773	return;	1462	return;
		1463
		1464	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
774		1465
775	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1466	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
776	ev_stop ((W)w);	1467	ev_stop (EV_A_ (W)w);
777		1468
778	fd_change (w->fd);	1469	fd_change (EV_A_ w->fd);
779	}	1470	}
780		1471
781	void	1472	void
782	ev_timer_start (struct ev_timer *w)	1473	ev_timer_start (EV_P_ ev_timer *w)
783	{	1474	{
784	if (ev_is_active (w))	1475	if (expect_false (ev_is_active (w)))
785	return;	1476	return;
786		1477
787	w->at += now;	1478	((WT)w)->at += mn_now;
788		1479
789	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1480	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
790		1481
791	ev_start ((W)w, ++timercnt);	1482	ev_start (EV_A_ (W)w, ++timercnt);
792	array_needsize (timers, timermax, timercnt, );	1483	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
793	timers [timercnt - 1] = w;	1484	timers [timercnt - 1] = w;
794	upheap ((WT *)timers, timercnt - 1);	1485	upheap ((WT *)timers, timercnt - 1);
795	}
796		1486
		1487	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1488	}
		1489
797	void	1490	void
798	ev_timer_stop (struct ev_timer *w)	1491	ev_timer_stop (EV_P_ ev_timer *w)
799	{	1492	{
800	ev_clear ((W)w);	1493	ev_clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1494	if (expect_false (!ev_is_active (w)))
802	return;	1495	return;
803		1496
804	if (w->active < timercnt--)	1497	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1498
		1499	{
		1500	int active = ((W)w)->active;
		1501
		1502	if (expect_true (--active < --timercnt))
805	{	1503	{
806	timers [w->active - 1] = timers [timercnt];	1504	timers [active] = timers [timercnt];
807	downheap ((WT *)timers, timercnt, w->active - 1);	1505	adjustheap ((WT *)timers, timercnt, active);
808	}	1506	}
		1507	}
809		1508
810	w->at = w->repeat;	1509	((WT)w)->at -= mn_now;
811		1510
812	ev_stop ((W)w);	1511	ev_stop (EV_A_ (W)w);
813	}	1512	}
814		1513
815	void	1514	void
816	ev_timer_again (struct ev_timer *w)	1515	ev_timer_again (EV_P_ ev_timer *w)
817	{	1516	{
818	if (ev_is_active (w))	1517	if (ev_is_active (w))
819	{	1518	{
820	if (w->repeat)	1519	if (w->repeat)
821	{	1520	{
822	w->at = now + w->repeat;	1521	((WT)w)->at = mn_now + w->repeat;
823	downheap ((WT *)timers, timercnt, w->active - 1);	1522	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
824	}	1523	}
825	else	1524	else
826	ev_timer_stop (w);	1525	ev_timer_stop (EV_A_ w);
827	}	1526	}
828	else if (w->repeat)	1527	else if (w->repeat)
		1528	{
		1529	w->at = w->repeat;
829	ev_timer_start (w);	1530	ev_timer_start (EV_A_ w);
		1531	}
830	}	1532	}
831		1533
		1534	#if EV_PERIODIC_ENABLE
832	void	1535	void
833	ev_periodic_start (struct ev_periodic *w)	1536	ev_periodic_start (EV_P_ ev_periodic *w)
834	{	1537	{
835	if (ev_is_active (w))	1538	if (expect_false (ev_is_active (w)))
836	return;	1539	return;
837		1540
838	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1541	if (w->reschedule_cb)
839		1542	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1543	else if (w->interval)
		1544	{
		1545	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 */	1546	/* 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;	1547	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1548	}
843		1549
844	ev_start ((W)w, ++periodiccnt);	1550	ev_start (EV_A_ (W)w, ++periodiccnt);
845	array_needsize (periodics, periodicmax, periodiccnt, );	1551	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
846	periodics [periodiccnt - 1] = w;	1552	periodics [periodiccnt - 1] = w;
847	upheap ((WT *)periodics, periodiccnt - 1);	1553	upheap ((WT *)periodics, periodiccnt - 1);
848	}
849		1554
		1555	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1556	}
		1557
850	void	1558	void
851	ev_periodic_stop (struct ev_periodic *w)	1559	ev_periodic_stop (EV_P_ ev_periodic *w)
852	{	1560	{
853	ev_clear ((W)w);	1561	ev_clear_pending (EV_A_ (W)w);
854	if (!ev_is_active (w))	1562	if (expect_false (!ev_is_active (w)))
855	return;	1563	return;
856		1564
857	if (w->active < periodiccnt--)	1565	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1566
		1567	{
		1568	int active = ((W)w)->active;
		1569
		1570	if (expect_true (--active < --periodiccnt))
858	{	1571	{
859	periodics [w->active - 1] = periodics [periodiccnt];	1572	periodics [active] = periodics [periodiccnt];
860	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1573	adjustheap ((WT *)periodics, periodiccnt, active);
861	}	1574	}
		1575	}
862		1576
863	ev_stop ((W)w);	1577	ev_stop (EV_A_ (W)w);
864	}	1578	}
865		1579
866	void	1580	void
		1581	ev_periodic_again (EV_P_ ev_periodic *w)
		1582	{
		1583	/* TODO: use adjustheap and recalculation */
		1584	ev_periodic_stop (EV_A_ w);
		1585	ev_periodic_start (EV_A_ w);
		1586	}
		1587	#endif
		1588
		1589	#ifndef SA_RESTART
		1590	# define SA_RESTART 0
		1591	#endif
		1592
		1593	void
867	ev_signal_start (struct ev_signal *w)	1594	ev_signal_start (EV_P_ ev_signal *w)
868	{	1595	{
		1596	#if EV_MULTIPLICITY
		1597	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1598	#endif
869	if (ev_is_active (w))	1599	if (expect_false (ev_is_active (w)))
870	return;	1600	return;
871		1601
		1602	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1603
872	ev_start ((W)w, 1);	1604	ev_start (EV_A_ (W)w, 1);
873	array_needsize (signals, signalmax, w->signum, signals_init);	1605	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
874	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1606	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
875		1607
876	if (!w->next)	1608	if (!((WL)w)->next)
877	{	1609	{
		1610	#if _WIN32
		1611	signal (w->signum, sighandler);
		1612	#else
878	struct sigaction sa;	1613	struct sigaction sa;
879	sa.sa_handler = sighandler;	1614	sa.sa_handler = sighandler;
880	sigfillset (&sa.sa_mask);	1615	sigfillset (&sa.sa_mask);
881	sa.sa_flags = 0;	1616	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
882	sigaction (w->signum, &sa, 0);	1617	sigaction (w->signum, &sa, 0);
		1618	#endif
883	}	1619	}
884	}	1620	}
885		1621
886	void	1622	void
887	ev_signal_stop (struct ev_signal *w)	1623	ev_signal_stop (EV_P_ ev_signal *w)
888	{	1624	{
889	ev_clear ((W)w);	1625	ev_clear_pending (EV_A_ (W)w);
890	if (!ev_is_active (w))	1626	if (expect_false (!ev_is_active (w)))
891	return;	1627	return;
892		1628
893	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1629	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
894	ev_stop ((W)w);	1630	ev_stop (EV_A_ (W)w);
895		1631
896	if (!signals [w->signum - 1].head)	1632	if (!signals [w->signum - 1].head)
897	signal (w->signum, SIG_DFL);	1633	signal (w->signum, SIG_DFL);
898	}	1634	}
899		1635
900	void	1636	void
		1637	ev_child_start (EV_P_ ev_child *w)
		1638	{
		1639	#if EV_MULTIPLICITY
		1640	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1641	#endif
		1642	if (expect_false (ev_is_active (w)))
		1643	return;
		1644
		1645	ev_start (EV_A_ (W)w, 1);
		1646	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1647	}
		1648
		1649	void
		1650	ev_child_stop (EV_P_ ev_child *w)
		1651	{
		1652	ev_clear_pending (EV_A_ (W)w);
		1653	if (expect_false (!ev_is_active (w)))
		1654	return;
		1655
		1656	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1657	ev_stop (EV_A_ (W)w);
		1658	}
		1659
		1660	#if EV_STAT_ENABLE
		1661
		1662	# ifdef _WIN32
		1663	# undef lstat
		1664	# define lstat(a,b) _stati64 (a,b)
		1665	# endif
		1666
		1667	#define DEF_STAT_INTERVAL 5.0074891
		1668	#define MIN_STAT_INTERVAL 0.1074891
		1669
		1670	void
		1671	ev_stat_stat (EV_P_ ev_stat *w)
		1672	{
		1673	if (lstat (w->path, &w->attr) < 0)
		1674	w->attr.st_nlink = 0;
		1675	else if (!w->attr.st_nlink)
		1676	w->attr.st_nlink = 1;
		1677	}
		1678
		1679	static void
		1680	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1681	{
		1682	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		1683
		1684	/* we copy this here each the time so that */
		1685	/* prev has the old value when the callback gets invoked */
		1686	w->prev = w->attr;
		1687	ev_stat_stat (EV_A_ w);
		1688
		1689	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
		1690	ev_feed_event (EV_A_ w, EV_STAT);
		1691	}
		1692
		1693	void
		1694	ev_stat_start (EV_P_ ev_stat *w)
		1695	{
		1696	if (expect_false (ev_is_active (w)))
		1697	return;
		1698
		1699	/* since we use memcmp, we need to clear any padding data etc. */
		1700	memset (&w->prev, 0, sizeof (ev_statdata));
		1701	memset (&w->attr, 0, sizeof (ev_statdata));
		1702
		1703	ev_stat_stat (EV_A_ w);
		1704
		1705	if (w->interval < MIN_STAT_INTERVAL)
		1706	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		1707
		1708	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		1709	ev_set_priority (&w->timer, ev_priority (w));
		1710	ev_timer_start (EV_A_ &w->timer);
		1711
		1712	ev_start (EV_A_ (W)w, 1);
		1713	}
		1714
		1715	void
		1716	ev_stat_stop (EV_P_ ev_stat *w)
		1717	{
		1718	ev_clear_pending (EV_A_ (W)w);
		1719	if (expect_false (!ev_is_active (w)))
		1720	return;
		1721
		1722	ev_timer_stop (EV_A_ &w->timer);
		1723
		1724	ev_stop (EV_A_ (W)w);
		1725	}
		1726	#endif
		1727
		1728	void
901	ev_idle_start (struct ev_idle *w)	1729	ev_idle_start (EV_P_ ev_idle *w)
902	{	1730	{
903	if (ev_is_active (w))	1731	if (expect_false (ev_is_active (w)))
904	return;	1732	return;
905		1733
906	ev_start ((W)w, ++idlecnt);	1734	ev_start (EV_A_ (W)w, ++idlecnt);
907	array_needsize (idles, idlemax, idlecnt, );	1735	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
908	idles [idlecnt - 1] = w;	1736	idles [idlecnt - 1] = w;
909	}	1737	}
910		1738
911	void	1739	void
912	ev_idle_stop (struct ev_idle *w)	1740	ev_idle_stop (EV_P_ ev_idle *w)
913	{	1741	{
914	ev_clear ((W)w);	1742	ev_clear_pending (EV_A_ (W)w);
915	if (ev_is_active (w))	1743	if (expect_false (!ev_is_active (w)))
916	return;	1744	return;
917		1745
		1746	{
		1747	int active = ((W)w)->active;
918	idles [w->active - 1] = idles [--idlecnt];	1748	idles [active - 1] = idles [--idlecnt];
		1749	((W)idles [active - 1])->active = active;
		1750	}
		1751
919	ev_stop ((W)w);	1752	ev_stop (EV_A_ (W)w);
920	}	1753	}
921		1754
922	void	1755	void
923	ev_prepare_start (struct ev_prepare *w)	1756	ev_prepare_start (EV_P_ ev_prepare *w)
924	{	1757	{
925	if (ev_is_active (w))	1758	if (expect_false (ev_is_active (w)))
926	return;	1759	return;
927		1760
928	ev_start ((W)w, ++preparecnt);	1761	ev_start (EV_A_ (W)w, ++preparecnt);
929	array_needsize (prepares, preparemax, preparecnt, );	1762	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
930	prepares [preparecnt - 1] = w;	1763	prepares [preparecnt - 1] = w;
931	}	1764	}
932		1765
933	void	1766	void
934	ev_prepare_stop (struct ev_prepare *w)	1767	ev_prepare_stop (EV_P_ ev_prepare *w)
935	{	1768	{
936	ev_clear ((W)w);	1769	ev_clear_pending (EV_A_ (W)w);
937	if (ev_is_active (w))	1770	if (expect_false (!ev_is_active (w)))
938	return;	1771	return;
939		1772
		1773	{
		1774	int active = ((W)w)->active;
940	prepares [w->active - 1] = prepares [--preparecnt];	1775	prepares [active - 1] = prepares [--preparecnt];
		1776	((W)prepares [active - 1])->active = active;
		1777	}
		1778
941	ev_stop ((W)w);	1779	ev_stop (EV_A_ (W)w);
942	}	1780	}
943		1781
944	void	1782	void
945	ev_check_start (struct ev_check *w)	1783	ev_check_start (EV_P_ ev_check *w)
946	{	1784	{
947	if (ev_is_active (w))	1785	if (expect_false (ev_is_active (w)))
948	return;	1786	return;
949		1787
950	ev_start ((W)w, ++checkcnt);	1788	ev_start (EV_A_ (W)w, ++checkcnt);
951	array_needsize (checks, checkmax, checkcnt, );	1789	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
952	checks [checkcnt - 1] = w;	1790	checks [checkcnt - 1] = w;
953	}	1791	}
954		1792
955	void	1793	void
956	ev_check_stop (struct ev_check *w)	1794	ev_check_stop (EV_P_ ev_check *w)
957	{	1795	{
958	ev_clear ((W)w);	1796	ev_clear_pending (EV_A_ (W)w);
959	if (ev_is_active (w))	1797	if (expect_false (!ev_is_active (w)))
960	return;	1798	return;
961		1799
		1800	{
		1801	int active = ((W)w)->active;
962	checks [w->active - 1] = checks [--checkcnt];	1802	checks [active - 1] = checks [--checkcnt];
		1803	((W)checks [active - 1])->active = active;
		1804	}
		1805
963	ev_stop ((W)w);	1806	ev_stop (EV_A_ (W)w);
964	}	1807	}
965		1808
966	void	1809	#if EV_EMBED_ENABLE
967	ev_child_start (struct ev_child *w)	1810	void noinline
		1811	ev_embed_sweep (EV_P_ ev_embed *w)
968	{	1812	{
		1813	ev_loop (w->loop, EVLOOP_NONBLOCK);
		1814	}
		1815
		1816	static void
		1817	embed_cb (EV_P_ ev_io *io, int revents)
		1818	{
		1819	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		1820
969	if (ev_is_active (w))	1821	if (ev_cb (w))
970	return;	1822	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		1823	else
		1824	ev_embed_sweep (loop, w);
		1825	}
971		1826
		1827	void
		1828	ev_embed_start (EV_P_ ev_embed *w)
		1829	{
		1830	if (expect_false (ev_is_active (w)))
		1831	return;
		1832
		1833	{
		1834	struct ev_loop *loop = w->loop;
		1835	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		1836	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		1837	}
		1838
		1839	ev_set_priority (&w->io, ev_priority (w));
		1840	ev_io_start (EV_A_ &w->io);
		1841
972	ev_start ((W)w, 1);	1842	ev_start (EV_A_ (W)w, 1);
973	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
974	}	1843	}
975		1844
976	void	1845	void
977	ev_child_stop (struct ev_child *w)	1846	ev_embed_stop (EV_P_ ev_embed *w)
978	{	1847	{
979	ev_clear ((W)w);	1848	ev_clear_pending (EV_A_ (W)w);
980	if (ev_is_active (w))	1849	if (expect_false (!ev_is_active (w)))
981	return;	1850	return;
982		1851
983	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1852	ev_io_stop (EV_A_ &w->io);
		1853
984	ev_stop ((W)w);	1854	ev_stop (EV_A_ (W)w);
985	}	1855	}
		1856	#endif
		1857
		1858	#if EV_FORK_ENABLE
		1859	void
		1860	ev_fork_start (EV_P_ ev_fork *w)
		1861	{
		1862	if (expect_false (ev_is_active (w)))
		1863	return;
		1864
		1865	ev_start (EV_A_ (W)w, ++forkcnt);
		1866	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		1867	forks [forkcnt - 1] = w;
		1868	}
		1869
		1870	void
		1871	ev_fork_stop (EV_P_ ev_fork *w)
		1872	{
		1873	ev_clear_pending (EV_A_ (W)w);
		1874	if (expect_false (!ev_is_active (w)))
		1875	return;
		1876
		1877	{
		1878	int active = ((W)w)->active;
		1879	forks [active - 1] = forks [--forkcnt];
		1880	((W)forks [active - 1])->active = active;
		1881	}
		1882
		1883	ev_stop (EV_A_ (W)w);
		1884	}
		1885	#endif
986		1886
987	/*****************************************************************************/	1887	/*****************************************************************************/
988		1888
989	struct ev_once	1889	struct ev_once
990	{	1890	{
991	struct ev_io io;	1891	ev_io io;
992	struct ev_timer to;	1892	ev_timer to;
993	void (*cb)(int revents, void *arg);	1893	void (*cb)(int revents, void *arg);
994	void *arg;	1894	void *arg;
995	};	1895	};
996		1896
997	static void	1897	static void
998	once_cb (struct ev_once *once, int revents)	1898	once_cb (EV_P_ struct ev_once *once, int revents)
999	{	1899	{
1000	void (*cb)(int revents, void *arg) = once->cb;	1900	void (*cb)(int revents, void *arg) = once->cb;
1001	void *arg = once->arg;	1901	void *arg = once->arg;
1002		1902
1003	ev_io_stop (&once->io);	1903	ev_io_stop (EV_A_ &once->io);
1004	ev_timer_stop (&once->to);	1904	ev_timer_stop (EV_A_ &once->to);
1005	free (once);	1905	ev_free (once);
1006		1906
1007	cb (revents, arg);	1907	cb (revents, arg);
1008	}	1908	}
1009		1909
1010	static void	1910	static void
1011	once_cb_io (struct ev_io *w, int revents)	1911	once_cb_io (EV_P_ ev_io *w, int revents)
1012	{	1912	{
1013	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1913	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1014	}	1914	}
1015		1915
1016	static void	1916	static void
1017	once_cb_to (struct ev_timer *w, int revents)	1917	once_cb_to (EV_P_ ev_timer *w, int revents)
1018	{	1918	{
1019	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1919	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1020	}	1920	}
1021		1921
1022	void	1922	void
1023	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1923	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1024	{	1924	{
1025	struct ev_once *once = malloc (sizeof (struct ev_once));	1925	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1026		1926
1027	if (!once)	1927	if (expect_false (!once))
		1928	{
1028	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1929	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1029	else	1930	return;
1030	{	1931	}
		1932
1031	once->cb = cb;	1933	once->cb = cb;
1032	once->arg = arg;	1934	once->arg = arg;
1033		1935
1034	ev_watcher_init (&once->io, once_cb_io);	1936	ev_init (&once->io, once_cb_io);
1035	if (fd >= 0)	1937	if (fd >= 0)
1036	{	1938	{
1037	ev_io_set (&once->io, fd, events);	1939	ev_io_set (&once->io, fd, events);
1038	ev_io_start (&once->io);	1940	ev_io_start (EV_A_ &once->io);
1039	}	1941	}
1040		1942
1041	ev_watcher_init (&once->to, once_cb_to);	1943	ev_init (&once->to, once_cb_to);
1042	if (timeout >= 0.)	1944	if (timeout >= 0.)
1043	{	1945	{
1044	ev_timer_set (&once->to, timeout, 0.);	1946	ev_timer_set (&once->to, timeout, 0.);
1045	ev_timer_start (&once->to);	1947	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	{	1948	}
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	}	1949	}
1127		1950
		1951	#ifdef __cplusplus
		1952	}
1128	#endif	1953	#endif
1129		1954
1130
1131
1132

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