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Comparing libev/ev.c (file contents):
Revision 1.58 by root, Sun Nov 4 16:52:52 2007 UTC vs.
Revision 1.181 by root, Wed Dec 12 00:17:08 2007 UTC

…		…
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (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
29	* 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.
30	*/	30	*/
31	#ifndef EV_EMBED	31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
		37	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
32	# 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
33	#endif	107	#endif
34		108
35	#include <math.h>	109	#include <math.h>
36	#include <stdlib.h>	110	#include <stdlib.h>
37	#include <unistd.h>
38	#include <fcntl.h>	111	#include <fcntl.h>
39	#include <signal.h>
40	#include <stddef.h>	112	#include <stddef.h>
41		113
42	#include <stdio.h>	114	#include <stdio.h>
43		115
44	#include <assert.h>	116	#include <assert.h>
45	#include <errno.h>	117	#include <errno.h>
46	#include <sys/types.h>	118	#include <sys/types.h>
		119	#include <time.h>
		120
		121	#include <signal.h>
		122
		123	#ifdef EV_H
		124	# include EV_H
		125	#else
		126	# include "ev.h"
		127	#endif
		128
47	#ifndef WIN32	129	#ifndef _WIN32
		130	# include <sys/time.h>
48	# include <sys/wait.h>	131	# include <sys/wait.h>
		132	# include <unistd.h>
		133	#else
		134	# define WIN32_LEAN_AND_MEAN
		135	# include <windows.h>
		136	# ifndef EV_SELECT_IS_WINSOCKET
		137	# define EV_SELECT_IS_WINSOCKET 1
49	#endif	138	# endif
50	#include <sys/time.h>	139	#endif
51	#include <time.h>
52		140
53	/**/	141	/**/
54		142
55	#ifndef EV_USE_MONOTONIC	143	#ifndef EV_USE_MONOTONIC
56	# define EV_USE_MONOTONIC 1	144	# define EV_USE_MONOTONIC 0
		145	#endif
		146
		147	#ifndef EV_USE_REALTIME
		148	# define EV_USE_REALTIME 0
57	#endif	149	#endif
58		150
59	#ifndef EV_USE_SELECT	151	#ifndef EV_USE_SELECT
60	# define EV_USE_SELECT 1	152	# define EV_USE_SELECT 1
61	#endif	153	#endif
62		154
63	#ifndef EV_USEV_POLL	155	#ifndef EV_USE_POLL
64	# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */	156	# ifdef _WIN32
		157	# define EV_USE_POLL 0
		158	# else
		159	# define EV_USE_POLL 1
		160	# endif
65	#endif	161	#endif
66		162
67	#ifndef EV_USE_EPOLL	163	#ifndef EV_USE_EPOLL
68	# define EV_USE_EPOLL 0	164	# define EV_USE_EPOLL 0
69	#endif	165	#endif
70		166
71	#ifndef EV_USE_KQUEUE	167	#ifndef EV_USE_KQUEUE
72	# define EV_USE_KQUEUE 0	168	# define EV_USE_KQUEUE 0
73	#endif	169	#endif
74		170
75	#ifndef EV_USE_REALTIME	171	#ifndef EV_USE_PORT
76	# define EV_USE_REALTIME 1	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
77	#endif	193	#endif
78		194
79	/**/	195	/**/
80		196
81	#ifndef CLOCK_MONOTONIC	197	#ifndef CLOCK_MONOTONIC
…		…
86	#ifndef CLOCK_REALTIME	202	#ifndef CLOCK_REALTIME
87	# undef EV_USE_REALTIME	203	# undef EV_USE_REALTIME
88	# define EV_USE_REALTIME 0	204	# define EV_USE_REALTIME 0
89	#endif	205	#endif
90		206
		207	#if EV_SELECT_IS_WINSOCKET
		208	# include <winsock.h>
		209	#endif
		210
		211	#if !EV_STAT_ENABLE
		212	# define EV_USE_INOTIFY 0
		213	#endif
		214
		215	#if EV_USE_INOTIFY
		216	# include <sys/inotify.h>
		217	#endif
		218
91	/**/	219	/**/
92		220
		221	/*
		222	* This is used to avoid floating point rounding problems.
		223	* It is added to ev_rt_now when scheduling periodics
		224	* to ensure progress, time-wise, even when rounding
		225	* errors are against us.
		226	* This value is good at least till the year 4000.
		227	* Better solutions welcome.
		228	*/
		229	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
		230
93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	231	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */	232	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
96	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */	233	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
97
98	#ifndef EV_EMBED
99	# include "ev.h"
100	#endif
101		234
102	#if __GNUC__ >= 3	235	#if __GNUC__ >= 3
103	# define expect(expr,value) __builtin_expect ((expr),(value))	236	# define expect(expr,value) __builtin_expect ((expr),(value))
104	# define inline inline	237	# define noinline __attribute__ ((noinline))
105	#else	238	#else
106	# define expect(expr,value) (expr)	239	# define expect(expr,value) (expr)
107	# define inline static	240	# define noinline
		241	# if __STDC_VERSION__ < 199901L
		242	# define inline
		243	# endif
108	#endif	244	#endif
109		245
110	#define expect_false(expr) expect ((expr) != 0, 0)	246	#define expect_false(expr) expect ((expr) != 0, 0)
111	#define expect_true(expr) expect ((expr) != 0, 1)	247	#define expect_true(expr) expect ((expr) != 0, 1)
		248	#define inline_size static inline
		249
		250	#if EV_MINIMAL
		251	# define inline_speed static noinline
		252	#else
		253	# define inline_speed static inline
		254	#endif
112		255
113	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	256	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
114	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	257	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
115		258
		259	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		260	#define EMPTY2(a,b) /* used to suppress some warnings */
		261
116	typedef struct ev_watcher *W;	262	typedef ev_watcher *W;
117	typedef struct ev_watcher_list *WL;	263	typedef ev_watcher_list *WL;
118	typedef struct ev_watcher_time *WT;	264	typedef ev_watcher_time *WT;
119		265
120	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	266	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
121		267
		268	#ifdef _WIN32
		269	# include "ev_win32.c"
		270	#endif
		271
122	/*****************************************************************************/	272	/*****************************************************************************/
123		273
		274	static void (*syserr_cb)(const char *msg);
		275
		276	void
		277	ev_set_syserr_cb (void (*cb)(const char *msg))
		278	{
		279	syserr_cb = cb;
		280	}
		281
		282	static void noinline
		283	syserr (const char *msg)
		284	{
		285	if (!msg)
		286	msg = "(libev) system error";
		287
		288	if (syserr_cb)
		289	syserr_cb (msg);
		290	else
		291	{
		292	perror (msg);
		293	abort ();
		294	}
		295	}
		296
		297	static void *(*alloc)(void *ptr, long size);
		298
		299	void
		300	ev_set_allocator (void *(*cb)(void *ptr, long size))
		301	{
		302	alloc = cb;
		303	}
		304
		305	inline_speed void *
		306	ev_realloc (void *ptr, long size)
		307	{
		308	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		309
		310	if (!ptr && size)
		311	{
		312	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		313	abort ();
		314	}
		315
		316	return ptr;
		317	}
		318
		319	#define ev_malloc(size) ev_realloc (0, (size))
		320	#define ev_free(ptr) ev_realloc ((ptr), 0)
		321
		322	/*****************************************************************************/
		323
124	typedef struct	324	typedef struct
125	{	325	{
126	struct ev_watcher_list *head;	326	WL head;
127	unsigned char events;	327	unsigned char events;
128	unsigned char reify;	328	unsigned char reify;
		329	#if EV_SELECT_IS_WINSOCKET
		330	SOCKET handle;
		331	#endif
129	} ANFD;	332	} ANFD;
130		333
131	typedef struct	334	typedef struct
132	{	335	{
133	W w;	336	W w;
134	int events;	337	int events;
135	} ANPENDING;	338	} ANPENDING;
136		339
		340	#if EV_USE_INOTIFY
		341	typedef struct
		342	{
		343	WL head;
		344	} ANFS;
		345	#endif
		346
137	#if EV_MULTIPLICITY	347	#if EV_MULTIPLICITY
138		348
139	struct ev_loop	349	struct ev_loop
140	{	350	{
		351	ev_tstamp ev_rt_now;
		352	#define ev_rt_now ((loop)->ev_rt_now)
141	# define VAR(name,decl) decl;	353	#define VAR(name,decl) decl;
142	# include "ev_vars.h"	354	#include "ev_vars.h"
143	};
144	# undef VAR	355	#undef VAR
		356	};
145	# include "ev_wrap.h"	357	#include "ev_wrap.h"
		358
		359	static struct ev_loop default_loop_struct;
		360	struct ev_loop *ev_default_loop_ptr;
146		361
147	#else	362	#else
148		363
		364	ev_tstamp ev_rt_now;
149	# define VAR(name,decl) static decl;	365	#define VAR(name,decl) static decl;
150	# include "ev_vars.h"	366	#include "ev_vars.h"
151	# undef VAR	367	#undef VAR
		368
		369	static int ev_default_loop_ptr;
152		370
153	#endif	371	#endif
154		372
155	/*****************************************************************************/	373	/*****************************************************************************/
156		374
157	inline ev_tstamp	375	ev_tstamp
158	ev_time (void)	376	ev_time (void)
159	{	377	{
160	#if EV_USE_REALTIME	378	#if EV_USE_REALTIME
161	struct timespec ts;	379	struct timespec ts;
162	clock_gettime (CLOCK_REALTIME, &ts);	380	clock_gettime (CLOCK_REALTIME, &ts);
…		…
166	gettimeofday (&tv, 0);	384	gettimeofday (&tv, 0);
167	return tv.tv_sec + tv.tv_usec * 1e-6;	385	return tv.tv_sec + tv.tv_usec * 1e-6;
168	#endif	386	#endif
169	}	387	}
170		388
171	inline ev_tstamp	389	ev_tstamp inline_size
172	get_clock (void)	390	get_clock (void)
173	{	391	{
174	#if EV_USE_MONOTONIC	392	#if EV_USE_MONOTONIC
175	if (expect_true (have_monotonic))	393	if (expect_true (have_monotonic))
176	{	394	{
…		…
181	#endif	399	#endif
182		400
183	return ev_time ();	401	return ev_time ();
184	}	402	}
185		403
		404	#if EV_MULTIPLICITY
186	ev_tstamp	405	ev_tstamp
187	ev_now (EV_P)	406	ev_now (EV_P)
188	{	407	{
189	return rt_now;	408	return ev_rt_now;
190	}	409	}
		410	#endif
191		411
192	#define array_roundsize(base,n) ((n) | 4 & ~3)	412	int inline_size
		413	array_nextsize (int elem, int cur, int cnt)
		414	{
		415	int ncur = cur + 1;
193		416
		417	do
		418	ncur <<= 1;
		419	while (cnt > ncur);
		420
		421	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		422	if (elem * ncur > 4096)
		423	{
		424	ncur *= elem;
		425	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		426	ncur = ncur - sizeof (void *) * 4;
		427	ncur /= elem;
		428	}
		429
		430	return ncur;
		431	}
		432
		433	static noinline void *
		434	array_realloc (int elem, void *base, int *cur, int cnt)
		435	{
		436	*cur = array_nextsize (elem, *cur, cnt);
		437	return ev_realloc (base, elem * *cur);
		438	}
		439
194	#define array_needsize(base,cur,cnt,init) \	440	#define array_needsize(type,base,cur,cnt,init) \
195	if (expect_false ((cnt) > cur)) \	441	if (expect_false ((cnt) > (cur))) \
196	{ \	442	{ \
197	int newcnt = cur; \	443	int ocur_ = (cur); \
198	do \	444	(base) = (type *)array_realloc \
199	{ \	445	(sizeof (type), (base), &(cur), (cnt)); \
200	newcnt = array_roundsize (base, newcnt << 1); \	446	init ((base) + (ocur_), (cur) - ocur_); \
201	} \	447	}
202	while ((cnt) > newcnt); \	448
		449	#if 0
		450	#define array_slim(type,stem) \
		451	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
203	\	452	{ \
204	base = realloc (base, sizeof (*base) * (newcnt)); \	453	stem ## max = array_roundsize (stem ## cnt >> 1); \
205	init (base + cur, newcnt - cur); \	454	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
206	cur = newcnt; \	455	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
207	}	456	}
		457	#endif
		458
		459	#define array_free(stem, idx) \
		460	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
208		461
209	/*****************************************************************************/	462	/*****************************************************************************/
210		463
211	static void	464	void noinline
		465	ev_feed_event (EV_P_ void *w, int revents)
		466	{
		467	W w_ = (W)w;
		468	int pri = ABSPRI (w_);
		469
		470	if (expect_false (w_->pending))
		471	pendings [pri][w_->pending - 1].events |= revents;
		472	else
		473	{
		474	w_->pending = ++pendingcnt [pri];
		475	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		476	pendings [pri][w_->pending - 1].w = w_;
		477	pendings [pri][w_->pending - 1].events = revents;
		478	}
		479	}
		480
		481	void inline_speed
		482	queue_events (EV_P_ W *events, int eventcnt, int type)
		483	{
		484	int i;
		485
		486	for (i = 0; i < eventcnt; ++i)
		487	ev_feed_event (EV_A_ events [i], type);
		488	}
		489
		490	/*****************************************************************************/
		491
		492	void inline_size
212	anfds_init (ANFD *base, int count)	493	anfds_init (ANFD *base, int count)
213	{	494	{
214	while (count--)	495	while (count--)
215	{	496	{
216	base->head = 0;	497	base->head = 0;
…		…
219		500
220	++base;	501	++base;
221	}	502	}
222	}	503	}
223		504
224	static void	505	void inline_speed
225	event (EV_P_ W w, int events)
226	{
227	if (w->pending)
228	{
229	pendings [ABSPRI (w)][w->pending - 1].events |= events;
230	return;
231	}
232
233	w->pending = ++pendingcnt [ABSPRI (w)];
234	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
235	pendings [ABSPRI (w)][w->pending - 1].w = w;
236	pendings [ABSPRI (w)][w->pending - 1].events = events;
237	}
238
239	static void
240	queue_events (EV_P_ W *events, int eventcnt, int type)
241	{
242	int i;
243
244	for (i = 0; i < eventcnt; ++i)
245	event (EV_A_ events [i], type);
246	}
247
248	static void
249	fd_event (EV_P_ int fd, int events)	506	fd_event (EV_P_ int fd, int revents)
250	{	507	{
251	ANFD *anfd = anfds + fd;	508	ANFD *anfd = anfds + fd;
252	struct ev_io *w;	509	ev_io *w;
253		510
254	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	511	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
255	{	512	{
256	int ev = w->events & events;	513	int ev = w->events & revents;
257		514
258	if (ev)	515	if (ev)
259	event (EV_A_ (W)w, ev);	516	ev_feed_event (EV_A_ (W)w, ev);
260	}	517	}
261	}	518	}
262		519
263	/*****************************************************************************/	520	void
		521	ev_feed_fd_event (EV_P_ int fd, int revents)
		522	{
		523	if (fd >= 0 && fd < anfdmax)
		524	fd_event (EV_A_ fd, revents);
		525	}
264		526
265	static void	527	void inline_size
266	fd_reify (EV_P)	528	fd_reify (EV_P)
267	{	529	{
268	int i;	530	int i;
269		531
270	for (i = 0; i < fdchangecnt; ++i)	532	for (i = 0; i < fdchangecnt; ++i)
271	{	533	{
272	int fd = fdchanges [i];	534	int fd = fdchanges [i];
273	ANFD *anfd = anfds + fd;	535	ANFD *anfd = anfds + fd;
274	struct ev_io *w;	536	ev_io *w;
275		537
276	int events = 0;	538	int events = 0;
277		539
278	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	540	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
279	events |= w->events;	541	events |= w->events;
280		542
		543	#if EV_SELECT_IS_WINSOCKET
		544	if (events)
		545	{
		546	unsigned long argp;
		547	anfd->handle = _get_osfhandle (fd);
		548	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		549	}
		550	#endif
		551
281	anfd->reify = 0;	552	anfd->reify = 0;
282		553
283	if (anfd->events != events)
284	{
285	method_modify (EV_A_ fd, anfd->events, events);	554	backend_modify (EV_A_ fd, anfd->events, events);
286	anfd->events = events;	555	anfd->events = events;
287	}
288	}	556	}
289		557
290	fdchangecnt = 0;	558	fdchangecnt = 0;
291	}	559	}
292		560
293	static void	561	void inline_size
294	fd_change (EV_P_ int fd)	562	fd_change (EV_P_ int fd)
295	{	563	{
296	if (anfds [fd].reify || fdchangecnt < 0)	564	if (expect_false (anfds [fd].reify))
297	return;	565	return;
298		566
299	anfds [fd].reify = 1;	567	anfds [fd].reify = 1;
300		568
301	++fdchangecnt;	569	++fdchangecnt;
302	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	570	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
303	fdchanges [fdchangecnt - 1] = fd;	571	fdchanges [fdchangecnt - 1] = fd;
304	}	572	}
305		573
306	static void	574	void inline_speed
307	fd_kill (EV_P_ int fd)	575	fd_kill (EV_P_ int fd)
308	{	576	{
309	struct ev_io *w;	577	ev_io *w;
310		578
311	while ((w = (struct ev_io *)anfds [fd].head))	579	while ((w = (ev_io *)anfds [fd].head))
312	{	580	{
313	ev_io_stop (EV_A_ w);	581	ev_io_stop (EV_A_ w);
314	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	582	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
315	}	583	}
		584	}
		585
		586	int inline_size
		587	fd_valid (int fd)
		588	{
		589	#ifdef _WIN32
		590	return _get_osfhandle (fd) != -1;
		591	#else
		592	return fcntl (fd, F_GETFD) != -1;
		593	#endif
316	}	594	}
317		595
318	/* called on EBADF to verify fds */	596	/* called on EBADF to verify fds */
319	static void	597	static void noinline
320	fd_ebadf (EV_P)	598	fd_ebadf (EV_P)
321	{	599	{
322	int fd;	600	int fd;
323		601
324	for (fd = 0; fd < anfdmax; ++fd)	602	for (fd = 0; fd < anfdmax; ++fd)
325	if (anfds [fd].events)	603	if (anfds [fd].events)
326	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	604	if (!fd_valid (fd) == -1 && errno == EBADF)
327	fd_kill (EV_A_ fd);	605	fd_kill (EV_A_ fd);
328	}	606	}
329		607
330	/* called on ENOMEM in select/poll to kill some fds and retry */	608	/* called on ENOMEM in select/poll to kill some fds and retry */
331	static void	609	static void noinline
332	fd_enomem (EV_P)	610	fd_enomem (EV_P)
333	{	611	{
334	int fd = anfdmax;	612	int fd;
335		613
336	while (fd--)	614	for (fd = anfdmax; fd--; )
337	if (anfds [fd].events)	615	if (anfds [fd].events)
338	{	616	{
339	close (fd);
340	fd_kill (EV_A_ fd);	617	fd_kill (EV_A_ fd);
341	return;	618	return;
342	}	619	}
343	}	620	}
344		621
345	/* susually called after fork if method needs to re-arm all fds from scratch */	622	/* usually called after fork if backend needs to re-arm all fds from scratch */
346	static void	623	static void noinline
347	fd_rearm_all (EV_P)	624	fd_rearm_all (EV_P)
348	{	625	{
349	int fd;	626	int fd;
350		627
351	/* this should be highly optimised to not do anything but set a flag */
352	for (fd = 0; fd < anfdmax; ++fd)	628	for (fd = 0; fd < anfdmax; ++fd)
353	if (anfds [fd].events)	629	if (anfds [fd].events)
354	{	630	{
355	anfds [fd].events = 0;	631	anfds [fd].events = 0;
356	fd_change (fd);	632	fd_change (EV_A_ fd);
357	}	633	}
358	}	634	}
359		635
360	/*****************************************************************************/	636	/*****************************************************************************/
361		637
362	static void	638	void inline_speed
363	upheap (WT *heap, int k)	639	upheap (WT *heap, int k)
364	{	640	{
365	WT w = heap [k];	641	WT w = heap [k];
366		642
367	while (k && heap [k >> 1]->at > w->at)	643	while (k)
368	{	644	{
		645	int p = (k - 1) >> 1;
		646
		647	if (heap [p]->at <= w->at)
		648	break;
		649
369	heap [k] = heap [k >> 1];	650	heap [k] = heap [p];
370	heap [k]->active = k + 1;	651	((W)heap [k])->active = k + 1;
371	k >>= 1;	652	k = p;
372	}	653	}
373		654
374	heap [k] = w;	655	heap [k] = w;
375	heap [k]->active = k + 1;	656	((W)heap [k])->active = k + 1;
376
377	}	657	}
378		658
379	static void	659	void inline_speed
380	downheap (WT *heap, int N, int k)	660	downheap (WT *heap, int N, int k)
381	{	661	{
382	WT w = heap [k];	662	WT w = heap [k];
383		663
384	while (k < (N >> 1))	664	for (;;)
385	{	665	{
386	int j = k << 1;	666	int c = (k << 1) + 1;
387		667
388	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	668	if (c >= N)
389	++j;
390
391	if (w->at <= heap [j]->at)
392	break;	669	break;
393		670
		671	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		672	? 1 : 0;
		673
		674	if (w->at <= heap [c]->at)
		675	break;
		676
394	heap [k] = heap [j];	677	heap [k] = heap [c];
395	heap [k]->active = k + 1;	678	((W)heap [k])->active = k + 1;
		679
396	k = j;	680	k = c;
397	}	681	}
398		682
399	heap [k] = w;	683	heap [k] = w;
400	heap [k]->active = k + 1;	684	((W)heap [k])->active = k + 1;
		685	}
		686
		687	void inline_size
		688	adjustheap (WT *heap, int N, int k)
		689	{
		690	upheap (heap, k);
		691	downheap (heap, N, k);
401	}	692	}
402		693
403	/*****************************************************************************/	694	/*****************************************************************************/
404		695
405	typedef struct	696	typedef struct
406	{	697	{
407	struct ev_watcher_list *head;	698	WL head;
408	sig_atomic_t volatile gotsig;	699	sig_atomic_t volatile gotsig;
409	} ANSIG;	700	} ANSIG;
410		701
411	static ANSIG *signals;	702	static ANSIG *signals;
412	static int signalmax;	703	static int signalmax;
413		704
414	static int sigpipe [2];	705	static int sigpipe [2];
415	static sig_atomic_t volatile gotsig;	706	static sig_atomic_t volatile gotsig;
		707	static ev_io sigev;
416		708
417	static void	709	void inline_size
418	signals_init (ANSIG *base, int count)	710	signals_init (ANSIG *base, int count)
419	{	711	{
420	while (count--)	712	while (count--)
421	{	713	{
422	base->head = 0;	714	base->head = 0;
…		…
427	}	719	}
428		720
429	static void	721	static void
430	sighandler (int signum)	722	sighandler (int signum)
431	{	723	{
		724	#if _WIN32
		725	signal (signum, sighandler);
		726	#endif
		727
432	signals [signum - 1].gotsig = 1;	728	signals [signum - 1].gotsig = 1;
433		729
434	if (!gotsig)	730	if (!gotsig)
435	{	731	{
436	int old_errno = errno;	732	int old_errno = errno;
…		…
438	write (sigpipe [1], &signum, 1);	734	write (sigpipe [1], &signum, 1);
439	errno = old_errno;	735	errno = old_errno;
440	}	736	}
441	}	737	}
442		738
		739	void noinline
		740	ev_feed_signal_event (EV_P_ int signum)
		741	{
		742	WL w;
		743
		744	#if EV_MULTIPLICITY
		745	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		746	#endif
		747
		748	--signum;
		749
		750	if (signum < 0 || signum >= signalmax)
		751	return;
		752
		753	signals [signum].gotsig = 0;
		754
		755	for (w = signals [signum].head; w; w = w->next)
		756	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		757	}
		758
443	static void	759	static void
444	sigcb (EV_P_ struct ev_io *iow, int revents)	760	sigcb (EV_P_ ev_io *iow, int revents)
445	{	761	{
446	struct ev_watcher_list *w;
447	int signum;	762	int signum;
448		763
449	read (sigpipe [0], &revents, 1);	764	read (sigpipe [0], &revents, 1);
450	gotsig = 0;	765	gotsig = 0;
451		766
452	for (signum = signalmax; signum--; )	767	for (signum = signalmax; signum--; )
453	if (signals [signum].gotsig)	768	if (signals [signum].gotsig)
454	{	769	ev_feed_signal_event (EV_A_ signum + 1);
455	signals [signum].gotsig = 0;
456
457	for (w = signals [signum].head; w; w = w->next)
458	event (EV_A_ (W)w, EV_SIGNAL);
459	}
460	}	770	}
461		771
462	static void	772	void inline_speed
		773	fd_intern (int fd)
		774	{
		775	#ifdef _WIN32
		776	int arg = 1;
		777	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		778	#else
		779	fcntl (fd, F_SETFD, FD_CLOEXEC);
		780	fcntl (fd, F_SETFL, O_NONBLOCK);
		781	#endif
		782	}
		783
		784	static void noinline
463	siginit (EV_P)	785	siginit (EV_P)
464	{	786	{
465	#ifndef WIN32	787	fd_intern (sigpipe [0]);
466	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	788	fd_intern (sigpipe [1]);
467	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
468
469	/* rather than sort out wether we really need nb, set it */
470	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
471	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
472	#endif
473		789
474	ev_io_set (&sigev, sigpipe [0], EV_READ);	790	ev_io_set (&sigev, sigpipe [0], EV_READ);
475	ev_io_start (EV_A_ &sigev);	791	ev_io_start (EV_A_ &sigev);
476	ev_unref (EV_A); /* child watcher should not keep loop alive */	792	ev_unref (EV_A); /* child watcher should not keep loop alive */
477	}	793	}
478		794
479	/*****************************************************************************/	795	/*****************************************************************************/
480		796
		797	static ev_child *childs [EV_PID_HASHSIZE];
		798
481	#ifndef WIN32	799	#ifndef _WIN32
		800
		801	static ev_signal childev;
		802
		803	void inline_speed
		804	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		805	{
		806	ev_child *w;
		807
		808	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		809	if (w->pid == pid || !w->pid)
		810	{
		811	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
		812	w->rpid = pid;
		813	w->rstatus = status;
		814	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		815	}
		816	}
482		817
483	#ifndef WCONTINUED	818	#ifndef WCONTINUED
484	# define WCONTINUED 0	819	# define WCONTINUED 0
485	#endif	820	#endif
486		821
487	static void	822	static void
488	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
489	{
490	struct ev_child *w;
491
492	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
493	if (w->pid == pid || !w->pid)
494	{
495	w->priority = sw->priority; /* need to do it *now* */
496	w->rpid = pid;
497	w->rstatus = status;
498	event (EV_A_ (W)w, EV_CHILD);
499	}
500	}
501
502	static void
503	childcb (EV_P_ struct ev_signal *sw, int revents)	823	childcb (EV_P_ ev_signal *sw, int revents)
504	{	824	{
505	int pid, status;	825	int pid, status;
506		826
		827	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
507	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	828	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
508	{	829	if (!WCONTINUED
		830	|| errno != EINVAL
		831	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		832	return;
		833
509	/* make sure we are called again until all childs have been reaped */	834	/* make sure we are called again until all childs have been reaped */
		835	/* we need to do it this way so that the callback gets called before we continue */
510	event (EV_A_ (W)sw, EV_SIGNAL);	836	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
511		837
512	child_reap (EV_A_ sw, pid, pid, status);	838	child_reap (EV_A_ sw, pid, pid, status);
		839	if (EV_PID_HASHSIZE > 1)
513	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	840	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
514	}
515	}	841	}
516		842
517	#endif	843	#endif
518		844
519	/*****************************************************************************/	845	/*****************************************************************************/
520		846
		847	#if EV_USE_PORT
		848	# include "ev_port.c"
		849	#endif
521	#if EV_USE_KQUEUE	850	#if EV_USE_KQUEUE
522	# include "ev_kqueue.c"	851	# include "ev_kqueue.c"
523	#endif	852	#endif
524	#if EV_USE_EPOLL	853	#if EV_USE_EPOLL
525	# include "ev_epoll.c"	854	# include "ev_epoll.c"
526	#endif	855	#endif
527	#if EV_USEV_POLL	856	#if EV_USE_POLL
528	# include "ev_poll.c"	857	# include "ev_poll.c"
529	#endif	858	#endif
530	#if EV_USE_SELECT	859	#if EV_USE_SELECT
531	# include "ev_select.c"	860	# include "ev_select.c"
532	#endif	861	#endif
…		…
542	{	871	{
543	return EV_VERSION_MINOR;	872	return EV_VERSION_MINOR;
544	}	873	}
545		874
546	/* return true if we are running with elevated privileges and should ignore env variables */	875	/* return true if we are running with elevated privileges and should ignore env variables */
547	static int	876	int inline_size
548	enable_secure (void)	877	enable_secure (void)
549	{	878	{
550	#ifdef WIN32	879	#ifdef _WIN32
551	return 0;	880	return 0;
552	#else	881	#else
553	return getuid () != geteuid ()	882	return getuid () != geteuid ()
554	|| getgid () != getegid ();	883	|| getgid () != getegid ();
555	#endif	884	#endif
556	}	885	}
557		886
558	int	887	unsigned int
559	ev_method (EV_P)	888	ev_supported_backends (void)
560	{	889	{
561	return method;	890	unsigned int flags = 0;
562	}
563		891
564	static void	892	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
565	loop_init (EV_P_ int methods)	893	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		894	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		895	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		896	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		897
		898	return flags;
		899	}
		900
		901	unsigned int
		902	ev_recommended_backends (void)
566	{	903	{
567	if (!method)	904	unsigned int flags = ev_supported_backends ();
		905
		906	#ifndef __NetBSD__
		907	/* kqueue is borked on everything but netbsd apparently */
		908	/* it usually doesn't work correctly on anything but sockets and pipes */
		909	flags &= ~EVBACKEND_KQUEUE;
		910	#endif
		911	#ifdef __APPLE__
		912	// flags &= ~EVBACKEND_KQUEUE; for documentation
		913	flags &= ~EVBACKEND_POLL;
		914	#endif
		915
		916	return flags;
		917	}
		918
		919	unsigned int
		920	ev_embeddable_backends (void)
		921	{
		922	return EVBACKEND_EPOLL
		923	| EVBACKEND_KQUEUE
		924	| EVBACKEND_PORT;
		925	}
		926
		927	unsigned int
		928	ev_backend (EV_P)
		929	{
		930	return backend;
		931	}
		932
		933	unsigned int
		934	ev_loop_count (EV_P)
		935	{
		936	return loop_count;
		937	}
		938
		939	static void noinline
		940	loop_init (EV_P_ unsigned int flags)
		941	{
		942	if (!backend)
568	{	943	{
569	#if EV_USE_MONOTONIC	944	#if EV_USE_MONOTONIC
570	{	945	{
571	struct timespec ts;	946	struct timespec ts;
572	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	947	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
573	have_monotonic = 1;	948	have_monotonic = 1;
574	}	949	}
575	#endif	950	#endif
576		951
577	rt_now = ev_time ();	952	ev_rt_now = ev_time ();
578	mn_now = get_clock ();	953	mn_now = get_clock ();
579	now_floor = mn_now;	954	now_floor = mn_now;
580	rtmn_diff = rt_now - mn_now;	955	rtmn_diff = ev_rt_now - mn_now;
581		956
582	if (methods == EVMETHOD_AUTO)	957	/* pid check not overridable via env */
583	if (!enable_secure () && getenv ("LIBEV_METHODS"))	958	#ifndef _WIN32
		959	if (flags & EVFLAG_FORKCHECK)
		960	curpid = getpid ();
		961	#endif
		962
		963	if (!(flags & EVFLAG_NOENV)
		964	&& !enable_secure ()
		965	&& getenv ("LIBEV_FLAGS"))
584	methods = atoi (getenv ("LIBEV_METHODS"));	966	flags = atoi (getenv ("LIBEV_FLAGS"));
585	else
586	methods = EVMETHOD_ANY;
587		967
588	method = 0;	968	if (!(flags & 0x0000ffffUL))
		969	flags |= ev_recommended_backends ();
		970
		971	backend = 0;
		972	backend_fd = -1;
		973	#if EV_USE_INOTIFY
		974	fs_fd = -2;
		975	#endif
		976
		977	#if EV_USE_PORT
		978	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		979	#endif
589	#if EV_USE_KQUEUE	980	#if EV_USE_KQUEUE
590	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);	981	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
591	#endif	982	#endif
592	#if EV_USE_EPOLL	983	#if EV_USE_EPOLL
593	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);	984	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
594	#endif	985	#endif
595	#if EV_USEV_POLL	986	#if EV_USE_POLL
596	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);	987	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
597	#endif	988	#endif
598	#if EV_USE_SELECT	989	#if EV_USE_SELECT
599	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);	990	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
600	#endif	991	#endif
601	}
602	}
603		992
604	void	993	ev_init (&sigev, sigcb);
		994	ev_set_priority (&sigev, EV_MAXPRI);
		995	}
		996	}
		997
		998	static void noinline
605	loop_destroy (EV_P)	999	loop_destroy (EV_P)
606	{	1000	{
		1001	int i;
		1002
		1003	#if EV_USE_INOTIFY
		1004	if (fs_fd >= 0)
		1005	close (fs_fd);
		1006	#endif
		1007
		1008	if (backend_fd >= 0)
		1009	close (backend_fd);
		1010
		1011	#if EV_USE_PORT
		1012	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		1013	#endif
607	#if EV_USE_KQUEUE	1014	#if EV_USE_KQUEUE
608	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);	1015	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
609	#endif	1016	#endif
610	#if EV_USE_EPOLL	1017	#if EV_USE_EPOLL
611	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);	1018	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
612	#endif	1019	#endif
613	#if EV_USEV_POLL	1020	#if EV_USE_POLL
614	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);	1021	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
615	#endif	1022	#endif
616	#if EV_USE_SELECT	1023	#if EV_USE_SELECT
617	if (method == EVMETHOD_SELECT) select_destroy (EV_A);	1024	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
618	#endif	1025	#endif
619		1026
620	method = 0;	1027	for (i = NUMPRI; i--; )
621	/*TODO*/	1028	{
622	}	1029	array_free (pending, [i]);
		1030	#if EV_IDLE_ENABLE
		1031	array_free (idle, [i]);
		1032	#endif
		1033	}
623		1034
624	void	1035	/* have to use the microsoft-never-gets-it-right macro */
		1036	array_free (fdchange, EMPTY);
		1037	array_free (timer, EMPTY);
		1038	#if EV_PERIODIC_ENABLE
		1039	array_free (periodic, EMPTY);
		1040	#endif
		1041	array_free (prepare, EMPTY);
		1042	array_free (check, EMPTY);
		1043
		1044	backend = 0;
		1045	}
		1046
		1047	void inline_size infy_fork (EV_P);
		1048
		1049	void inline_size
625	loop_fork (EV_P)	1050	loop_fork (EV_P)
626	{	1051	{
627	/*TODO*/	1052	#if EV_USE_PORT
		1053	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1054	#endif
		1055	#if EV_USE_KQUEUE
		1056	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1057	#endif
628	#if EV_USE_EPOLL	1058	#if EV_USE_EPOLL
629	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);	1059	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
630	#endif	1060	#endif
631	#if EV_USE_KQUEUE	1061	#if EV_USE_INOTIFY
632	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);	1062	infy_fork (EV_A);
633	#endif	1063	#endif
		1064
		1065	if (ev_is_active (&sigev))
		1066	{
		1067	/* default loop */
		1068
		1069	ev_ref (EV_A);
		1070	ev_io_stop (EV_A_ &sigev);
		1071	close (sigpipe [0]);
		1072	close (sigpipe [1]);
		1073
		1074	while (pipe (sigpipe))
		1075	syserr ("(libev) error creating pipe");
		1076
		1077	siginit (EV_A);
		1078	}
		1079
		1080	postfork = 0;
634	}	1081	}
635		1082
636	#if EV_MULTIPLICITY	1083	#if EV_MULTIPLICITY
637	struct ev_loop *	1084	struct ev_loop *
638	ev_loop_new (int methods)	1085	ev_loop_new (unsigned int flags)
639	{	1086	{
640	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));	1087	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
641		1088
		1089	memset (loop, 0, sizeof (struct ev_loop));
		1090
642	loop_init (EV_A_ methods);	1091	loop_init (EV_A_ flags);
643		1092
644	if (ev_methods (EV_A))	1093	if (ev_backend (EV_A))
645	return loop;	1094	return loop;
646		1095
647	return 0;	1096	return 0;
648	}	1097	}
649		1098
650	void	1099	void
651	ev_loop_destroy (EV_P)	1100	ev_loop_destroy (EV_P)
652	{	1101	{
653	loop_destroy (EV_A);	1102	loop_destroy (EV_A);
654	free (loop);	1103	ev_free (loop);
655	}	1104	}
656		1105
657	void	1106	void
658	ev_loop_fork (EV_P)	1107	ev_loop_fork (EV_P)
659	{	1108	{
660	loop_fork (EV_A);	1109	postfork = 1;
661	}	1110	}
662		1111
663	#endif	1112	#endif
664		1113
665	#if EV_MULTIPLICITY	1114	#if EV_MULTIPLICITY
666	struct ev_loop default_loop_struct;
667	static struct ev_loop *default_loop;
668
669	struct ev_loop *	1115	struct ev_loop *
		1116	ev_default_loop_init (unsigned int flags)
670	#else	1117	#else
671	static int default_loop;
672
673	int	1118	int
		1119	ev_default_loop (unsigned int flags)
674	#endif	1120	#endif
675	ev_default_loop (int methods)
676	{	1121	{
677	if (sigpipe [0] == sigpipe [1])	1122	if (sigpipe [0] == sigpipe [1])
678	if (pipe (sigpipe))	1123	if (pipe (sigpipe))
679	return 0;	1124	return 0;
680		1125
681	if (!default_loop)	1126	if (!ev_default_loop_ptr)
682	{	1127	{
683	#if EV_MULTIPLICITY	1128	#if EV_MULTIPLICITY
684	struct ev_loop *loop = default_loop = &default_loop_struct;	1129	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
685	#else	1130	#else
686	default_loop = 1;	1131	ev_default_loop_ptr = 1;
687	#endif	1132	#endif
688		1133
689	loop_init (EV_A_ methods);	1134	loop_init (EV_A_ flags);
690		1135
691	if (ev_method (EV_A))	1136	if (ev_backend (EV_A))
692	{	1137	{
693	ev_watcher_init (&sigev, sigcb);
694	ev_set_priority (&sigev, EV_MAXPRI);
695	siginit (EV_A);	1138	siginit (EV_A);
696		1139
697	#ifndef WIN32	1140	#ifndef _WIN32
698	ev_signal_init (&childev, childcb, SIGCHLD);	1141	ev_signal_init (&childev, childcb, SIGCHLD);
699	ev_set_priority (&childev, EV_MAXPRI);	1142	ev_set_priority (&childev, EV_MAXPRI);
700	ev_signal_start (EV_A_ &childev);	1143	ev_signal_start (EV_A_ &childev);
701	ev_unref (EV_A); /* child watcher should not keep loop alive */	1144	ev_unref (EV_A); /* child watcher should not keep loop alive */
702	#endif	1145	#endif
703	}	1146	}
704	else	1147	else
705	default_loop = 0;	1148	ev_default_loop_ptr = 0;
706	}	1149	}
707		1150
708	return default_loop;	1151	return ev_default_loop_ptr;
709	}	1152	}
710		1153
711	void	1154	void
712	ev_default_destroy (void)	1155	ev_default_destroy (void)
713	{	1156	{
714	#if EV_MULTIPLICITY	1157	#if EV_MULTIPLICITY
715	struct ev_loop *loop = default_loop;	1158	struct ev_loop *loop = ev_default_loop_ptr;
716	#endif	1159	#endif
717		1160
		1161	#ifndef _WIN32
718	ev_ref (EV_A); /* child watcher */	1162	ev_ref (EV_A); /* child watcher */
719	ev_signal_stop (EV_A_ &childev);	1163	ev_signal_stop (EV_A_ &childev);
		1164	#endif
720		1165
721	ev_ref (EV_A); /* signal watcher */	1166	ev_ref (EV_A); /* signal watcher */
722	ev_io_stop (EV_A_ &sigev);	1167	ev_io_stop (EV_A_ &sigev);
723		1168
724	close (sigpipe [0]); sigpipe [0] = 0;	1169	close (sigpipe [0]); sigpipe [0] = 0;
…		…
726		1171
727	loop_destroy (EV_A);	1172	loop_destroy (EV_A);
728	}	1173	}
729		1174
730	void	1175	void
731	ev_default_fork (EV_P)	1176	ev_default_fork (void)
732	{	1177	{
733	loop_fork (EV_A);	1178	#if EV_MULTIPLICITY
		1179	struct ev_loop *loop = ev_default_loop_ptr;
		1180	#endif
734		1181
735	ev_io_stop (EV_A_ &sigev);	1182	if (backend)
736	close (sigpipe [0]);	1183	postfork = 1;
737	close (sigpipe [1]);
738	pipe (sigpipe);
739
740	ev_ref (EV_A); /* signal watcher */
741	siginit (EV_A);
742	}	1184	}
743		1185
744	/*****************************************************************************/	1186	/*****************************************************************************/
745		1187
746	static void	1188	void
		1189	ev_invoke (EV_P_ void *w, int revents)
		1190	{
		1191	EV_CB_INVOKE ((W)w, revents);
		1192	}
		1193
		1194	void inline_speed
747	call_pending (EV_P)	1195	call_pending (EV_P)
748	{	1196	{
749	int pri;	1197	int pri;
750		1198
751	for (pri = NUMPRI; pri--; )	1199	for (pri = NUMPRI; pri--; )
752	while (pendingcnt [pri])	1200	while (pendingcnt [pri])
753	{	1201	{
754	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1202	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
755		1203
756	if (p->w)	1204	if (expect_true (p->w))
757	{	1205	{
		1206	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1207
758	p->w->pending = 0;	1208	p->w->pending = 0;
759	p->w->cb (EV_A_ p->w, p->events);	1209	EV_CB_INVOKE (p->w, p->events);
760	}	1210	}
761	}	1211	}
762	}	1212	}
763		1213
764	static void	1214	void inline_size
765	timers_reify (EV_P)	1215	timers_reify (EV_P)
766	{	1216	{
767	while (timercnt && timers [0]->at <= mn_now)	1217	while (timercnt && ((WT)timers [0])->at <= mn_now)
768	{	1218	{
769	struct ev_timer *w = timers [0];	1219	ev_timer *w = (ev_timer *)timers [0];
		1220
		1221	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
770		1222
771	/* first reschedule or stop timer */	1223	/* first reschedule or stop timer */
772	if (w->repeat)	1224	if (w->repeat)
773	{	1225	{
774	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1226	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1227
775	w->at = mn_now + w->repeat;	1228	((WT)w)->at += w->repeat;
		1229	if (((WT)w)->at < mn_now)
		1230	((WT)w)->at = mn_now;
		1231
776	downheap ((WT *)timers, timercnt, 0);	1232	downheap (timers, timercnt, 0);
777	}	1233	}
778	else	1234	else
779	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1235	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
780		1236
781	event (EV_A_ (W)w, EV_TIMEOUT);	1237	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
782	}	1238	}
783	}	1239	}
784		1240
785	static void	1241	#if EV_PERIODIC_ENABLE
		1242	void inline_size
786	periodics_reify (EV_P)	1243	periodics_reify (EV_P)
787	{	1244	{
788	while (periodiccnt && periodics [0]->at <= rt_now)	1245	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
789	{	1246	{
790	struct ev_periodic *w = periodics [0];	1247	ev_periodic *w = (ev_periodic *)periodics [0];
		1248
		1249	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
791		1250
792	/* first reschedule or stop timer */	1251	/* first reschedule or stop timer */
793	if (w->interval)	1252	if (w->reschedule_cb)
794	{	1253	{
		1254	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
		1255	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1256	downheap (periodics, periodiccnt, 0);
		1257	}
		1258	else if (w->interval)
		1259	{
795	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;	1260	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1261	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
796	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));	1262	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
797	downheap ((WT *)periodics, periodiccnt, 0);	1263	downheap (periodics, periodiccnt, 0);
798	}	1264	}
799	else	1265	else
800	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1266	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
801		1267
802	event (EV_A_ (W)w, EV_PERIODIC);	1268	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
803	}	1269	}
804	}	1270	}
805		1271
806	static void	1272	static void noinline
807	periodics_reschedule (EV_P)	1273	periodics_reschedule (EV_P)
808	{	1274	{
809	int i;	1275	int i;
810		1276
811	/* adjust periodics after time jump */	1277	/* adjust periodics after time jump */
812	for (i = 0; i < periodiccnt; ++i)	1278	for (i = 0; i < periodiccnt; ++i)
813	{	1279	{
814	struct ev_periodic *w = periodics [i];	1280	ev_periodic *w = (ev_periodic *)periodics [i];
815		1281
		1282	if (w->reschedule_cb)
		1283	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
816	if (w->interval)	1284	else if (w->interval)
		1285	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1286	}
		1287
		1288	/* now rebuild the heap */
		1289	for (i = periodiccnt >> 1; i--; )
		1290	downheap (periodics, periodiccnt, i);
		1291	}
		1292	#endif
		1293
		1294	#if EV_IDLE_ENABLE
		1295	void inline_size
		1296	idle_reify (EV_P)
		1297	{
		1298	if (expect_false (idleall))
		1299	{
		1300	int pri;
		1301
		1302	for (pri = NUMPRI; pri--; )
817	{	1303	{
818	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;	1304	if (pendingcnt [pri])
		1305	break;
819		1306
820	if (fabs (diff) >= 1e-4)	1307	if (idlecnt [pri])
821	{	1308	{
822	ev_periodic_stop (EV_A_ w);	1309	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
823	ev_periodic_start (EV_A_ w);	1310	break;
824
825	i = 0; /* restart loop, inefficient, but time jumps should be rare */
826	}	1311	}
827	}	1312	}
828	}	1313	}
829	}	1314	}
		1315	#endif
830		1316
831	inline int	1317	void inline_speed
832	time_update_monotonic (EV_P)	1318	time_update (EV_P_ ev_tstamp max_block)
833	{
834	mn_now = get_clock ();
835
836	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
837	{
838	rt_now = rtmn_diff + mn_now;
839	return 0;
840	}
841	else
842	{
843	now_floor = mn_now;
844	rt_now = ev_time ();
845	return 1;
846	}
847	}
848
849	static void
850	time_update (EV_P)
851	{	1319	{
852	int i;	1320	int i;
853		1321
854	#if EV_USE_MONOTONIC	1322	#if EV_USE_MONOTONIC
855	if (expect_true (have_monotonic))	1323	if (expect_true (have_monotonic))
856	{	1324	{
857	if (time_update_monotonic (EV_A))	1325	ev_tstamp odiff = rtmn_diff;
		1326
		1327	mn_now = get_clock ();
		1328
		1329	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1330	/* interpolate in the meantime */
		1331	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
858	{	1332	{
859	ev_tstamp odiff = rtmn_diff;	1333	ev_rt_now = rtmn_diff + mn_now;
		1334	return;
		1335	}
860		1336
		1337	now_floor = mn_now;
		1338	ev_rt_now = ev_time ();
		1339
861	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1340	/* loop a few times, before making important decisions.
		1341	* on the choice of "4": one iteration isn't enough,
		1342	* in case we get preempted during the calls to
		1343	* ev_time and get_clock. a second call is almost guaranteed
		1344	* to succeed in that case, though. and looping a few more times
		1345	* doesn't hurt either as we only do this on time-jumps or
		1346	* in the unlikely event of having been preempted here.
		1347	*/
		1348	for (i = 4; --i; )
862	{	1349	{
863	rtmn_diff = rt_now - mn_now;	1350	rtmn_diff = ev_rt_now - mn_now;
864		1351
865	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1352	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
866	return; /* all is well */	1353	return; /* all is well */
867		1354
868	rt_now = ev_time ();	1355	ev_rt_now = ev_time ();
869	mn_now = get_clock ();	1356	mn_now = get_clock ();
870	now_floor = mn_now;	1357	now_floor = mn_now;
871	}	1358	}
872		1359
		1360	# if EV_PERIODIC_ENABLE
		1361	periodics_reschedule (EV_A);
		1362	# endif
		1363	/* no timer adjustment, as the monotonic clock doesn't jump */
		1364	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1365	}
		1366	else
		1367	#endif
		1368	{
		1369	ev_rt_now = ev_time ();
		1370
		1371	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1372	{
		1373	#if EV_PERIODIC_ENABLE
873	periodics_reschedule (EV_A);	1374	periodics_reschedule (EV_A);
874	/* no timer adjustment, as the monotonic clock doesn't jump */	1375	#endif
875	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */	1376	/* adjust timers. this is easy, as the offset is the same for all of them */
		1377	for (i = 0; i < timercnt; ++i)
		1378	((WT)timers [i])->at += ev_rt_now - mn_now;
876	}	1379	}
877	}
878	else
879	#endif
880	{
881	rt_now = ev_time ();
882		1380
883	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
884	{
885	periodics_reschedule (EV_A);
886
887	/* adjust timers. this is easy, as the offset is the same for all */
888	for (i = 0; i < timercnt; ++i)
889	timers [i]->at += rt_now - mn_now;
890	}
891
892	mn_now = rt_now;	1381	mn_now = ev_rt_now;
893	}	1382	}
894	}	1383	}
895		1384
896	void	1385	void
897	ev_ref (EV_P)	1386	ev_ref (EV_P)
…		…
908	static int loop_done;	1397	static int loop_done;
909		1398
910	void	1399	void
911	ev_loop (EV_P_ int flags)	1400	ev_loop (EV_P_ int flags)
912	{	1401	{
913	double block;
914	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1402	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1403	? EVUNLOOP_ONE
		1404	: EVUNLOOP_CANCEL;
		1405
		1406	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
915		1407
916	do	1408	do
917	{	1409	{
		1410	#ifndef _WIN32
		1411	if (expect_false (curpid)) /* penalise the forking check even more */
		1412	if (expect_false (getpid () != curpid))
		1413	{
		1414	curpid = getpid ();
		1415	postfork = 1;
		1416	}
		1417	#endif
		1418
		1419	#if EV_FORK_ENABLE
		1420	/* we might have forked, so queue fork handlers */
		1421	if (expect_false (postfork))
		1422	if (forkcnt)
		1423	{
		1424	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1425	call_pending (EV_A);
		1426	}
		1427	#endif
		1428
918	/* queue check watchers (and execute them) */	1429	/* queue prepare watchers (and execute them) */
919	if (expect_false (preparecnt))	1430	if (expect_false (preparecnt))
920	{	1431	{
921	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1432	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
922	call_pending (EV_A);	1433	call_pending (EV_A);
923	}	1434	}
924		1435
		1436	if (expect_false (!activecnt))
		1437	break;
		1438
		1439	/* we might have forked, so reify kernel state if necessary */
		1440	if (expect_false (postfork))
		1441	loop_fork (EV_A);
		1442
925	/* update fd-related kernel structures */	1443	/* update fd-related kernel structures */
926	fd_reify (EV_A);	1444	fd_reify (EV_A);
927		1445
928	/* calculate blocking time */	1446	/* calculate blocking time */
		1447	{
		1448	ev_tstamp block;
929		1449
930	/* we only need this for !monotonic clockor timers, but as we basically	1450	if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))
931	always have timers, we just calculate it always */	1451	block = 0.; /* do not block at all */
932	#if EV_USE_MONOTONIC
933	if (expect_true (have_monotonic))
934	time_update_monotonic (EV_A);
935	else	1452	else
936	#endif
937	{	1453	{
938	rt_now = ev_time ();	1454	/* update time to cancel out callback processing overhead */
939	mn_now = rt_now;	1455	time_update (EV_A_ 1e100);
940	}
941		1456
942	if (flags & EVLOOP_NONBLOCK || idlecnt)
943	block = 0.;
944	else
945	{
946	block = MAX_BLOCKTIME;	1457	block = MAX_BLOCKTIME;
947		1458
948	if (timercnt)	1459	if (timercnt)
949	{	1460	{
950	ev_tstamp to = timers [0]->at - mn_now + method_fudge;	1461	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
951	if (block > to) block = to;	1462	if (block > to) block = to;
952	}	1463	}
953		1464
		1465	#if EV_PERIODIC_ENABLE
954	if (periodiccnt)	1466	if (periodiccnt)
955	{	1467	{
956	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;	1468	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
957	if (block > to) block = to;	1469	if (block > to) block = to;
958	}	1470	}
		1471	#endif
959		1472
960	if (block < 0.) block = 0.;	1473	if (expect_false (block < 0.)) block = 0.;
961	}	1474	}
962		1475
		1476	++loop_count;
963	method_poll (EV_A_ block);	1477	backend_poll (EV_A_ block);
964		1478
965	/* update rt_now, do magic */	1479	/* update ev_rt_now, do magic */
966	time_update (EV_A);	1480	time_update (EV_A_ block);
		1481	}
967		1482
968	/* queue pending timers and reschedule them */	1483	/* queue pending timers and reschedule them */
969	timers_reify (EV_A); /* relative timers called last */	1484	timers_reify (EV_A); /* relative timers called last */
		1485	#if EV_PERIODIC_ENABLE
970	periodics_reify (EV_A); /* absolute timers called first */	1486	periodics_reify (EV_A); /* absolute timers called first */
		1487	#endif
971		1488
		1489	#if EV_IDLE_ENABLE
972	/* queue idle watchers unless io or timers are pending */	1490	/* queue idle watchers unless other events are pending */
973	if (!pendingcnt)	1491	idle_reify (EV_A);
974	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	1492	#endif
975		1493
976	/* queue check watchers, to be executed first */	1494	/* queue check watchers, to be executed first */
977	if (checkcnt)	1495	if (expect_false (checkcnt))
978	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1496	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
979		1497
980	call_pending (EV_A);	1498	call_pending (EV_A);
		1499
981	}	1500	}
982	while (activecnt && !loop_done);	1501	while (expect_true (activecnt && !loop_done));
983		1502
984	if (loop_done != 2)	1503	if (loop_done == EVUNLOOP_ONE)
985	loop_done = 0;	1504	loop_done = EVUNLOOP_CANCEL;
986	}	1505	}
987		1506
988	void	1507	void
989	ev_unloop (EV_P_ int how)	1508	ev_unloop (EV_P_ int how)
990	{	1509	{
991	loop_done = how;	1510	loop_done = how;
992	}	1511	}
993		1512
994	/*****************************************************************************/	1513	/*****************************************************************************/
995		1514
996	inline void	1515	void inline_size
997	wlist_add (WL *head, WL elem)	1516	wlist_add (WL *head, WL elem)
998	{	1517	{
999	elem->next = *head;	1518	elem->next = *head;
1000	*head = elem;	1519	*head = elem;
1001	}	1520	}
1002		1521
1003	inline void	1522	void inline_size
1004	wlist_del (WL *head, WL elem)	1523	wlist_del (WL *head, WL elem)
1005	{	1524	{
1006	while (*head)	1525	while (*head)
1007	{	1526	{
1008	if (*head == elem)	1527	if (*head == elem)
…		…
1013		1532
1014	head = &(*head)->next;	1533	head = &(*head)->next;
1015	}	1534	}
1016	}	1535	}
1017		1536
1018	inline void	1537	void inline_speed
1019	ev_clear_pending (EV_P_ W w)	1538	clear_pending (EV_P_ W w)
1020	{	1539	{
1021	if (w->pending)	1540	if (w->pending)
1022	{	1541	{
1023	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1542	pendings [ABSPRI (w)][w->pending - 1].w = 0;
1024	w->pending = 0;	1543	w->pending = 0;
1025	}	1544	}
1026	}	1545	}
1027		1546
1028	inline void	1547	int
		1548	ev_clear_pending (EV_P_ void *w)
		1549	{
		1550	W w_ = (W)w;
		1551	int pending = w_->pending;
		1552
		1553	if (expect_true (pending))
		1554	{
		1555	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1556	w_->pending = 0;
		1557	p->w = 0;
		1558	return p->events;
		1559	}
		1560	else
		1561	return 0;
		1562	}
		1563
		1564	void inline_size
		1565	pri_adjust (EV_P_ W w)
		1566	{
		1567	int pri = w->priority;
		1568	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1569	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1570	w->priority = pri;
		1571	}
		1572
		1573	void inline_speed
1029	ev_start (EV_P_ W w, int active)	1574	ev_start (EV_P_ W w, int active)
1030	{	1575	{
1031	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1576	pri_adjust (EV_A_ w);
1032	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1033
1034	w->active = active;	1577	w->active = active;
1035	ev_ref (EV_A);	1578	ev_ref (EV_A);
1036	}	1579	}
1037		1580
1038	inline void	1581	void inline_size
1039	ev_stop (EV_P_ W w)	1582	ev_stop (EV_P_ W w)
1040	{	1583	{
1041	ev_unref (EV_A);	1584	ev_unref (EV_A);
1042	w->active = 0;	1585	w->active = 0;
1043	}	1586	}
1044		1587
1045	/*****************************************************************************/	1588	/*****************************************************************************/
1046		1589
1047	void	1590	void noinline
1048	ev_io_start (EV_P_ struct ev_io *w)	1591	ev_io_start (EV_P_ ev_io *w)
1049	{	1592	{
1050	int fd = w->fd;	1593	int fd = w->fd;
1051		1594
1052	if (ev_is_active (w))	1595	if (expect_false (ev_is_active (w)))
1053	return;	1596	return;
1054		1597
1055	assert (("ev_io_start called with negative fd", fd >= 0));	1598	assert (("ev_io_start called with negative fd", fd >= 0));
1056		1599
1057	ev_start (EV_A_ (W)w, 1);	1600	ev_start (EV_A_ (W)w, 1);
1058	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1601	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1059	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1602	wlist_add ((WL *)&anfds[fd].head, (WL)w);
1060		1603
1061	fd_change (EV_A_ fd);	1604	fd_change (EV_A_ fd);
1062	}	1605	}
1063		1606
1064	void	1607	void noinline
1065	ev_io_stop (EV_P_ struct ev_io *w)	1608	ev_io_stop (EV_P_ ev_io *w)
1066	{	1609	{
1067	ev_clear_pending (EV_A_ (W)w);	1610	clear_pending (EV_A_ (W)w);
1068	if (!ev_is_active (w))	1611	if (expect_false (!ev_is_active (w)))
1069	return;	1612	return;
		1613
		1614	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1070		1615
1071	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1616	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
1072	ev_stop (EV_A_ (W)w);	1617	ev_stop (EV_A_ (W)w);
1073		1618
1074	fd_change (EV_A_ w->fd);	1619	fd_change (EV_A_ w->fd);
1075	}	1620	}
1076		1621
1077	void	1622	void noinline
1078	ev_timer_start (EV_P_ struct ev_timer *w)	1623	ev_timer_start (EV_P_ ev_timer *w)
1079	{	1624	{
1080	if (ev_is_active (w))	1625	if (expect_false (ev_is_active (w)))
1081	return;	1626	return;
1082		1627
1083	w->at += mn_now;	1628	((WT)w)->at += mn_now;
1084		1629
1085	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1630	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1086		1631
1087	ev_start (EV_A_ (W)w, ++timercnt);	1632	ev_start (EV_A_ (W)w, ++timercnt);
1088	array_needsize (timers, timermax, timercnt, );	1633	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
1089	timers [timercnt - 1] = w;	1634	timers [timercnt - 1] = (WT)w;
1090	upheap ((WT *)timers, timercnt - 1);	1635	upheap (timers, timercnt - 1);
1091	}
1092		1636
1093	void	1637	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1638	}
		1639
		1640	void noinline
1094	ev_timer_stop (EV_P_ struct ev_timer *w)	1641	ev_timer_stop (EV_P_ ev_timer *w)
1095	{	1642	{
1096	ev_clear_pending (EV_A_ (W)w);	1643	clear_pending (EV_A_ (W)w);
1097	if (!ev_is_active (w))	1644	if (expect_false (!ev_is_active (w)))
1098	return;	1645	return;
1099		1646
1100	if (w->active < timercnt--)	1647	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
		1648
		1649	{
		1650	int active = ((W)w)->active;
		1651
		1652	if (expect_true (--active < --timercnt))
1101	{	1653	{
1102	timers [w->active - 1] = timers [timercnt];	1654	timers [active] = timers [timercnt];
1103	downheap ((WT *)timers, timercnt, w->active - 1);	1655	adjustheap (timers, timercnt, active);
1104	}	1656	}
		1657	}
1105		1658
1106	w->at = w->repeat;	1659	((WT)w)->at -= mn_now;
1107		1660
1108	ev_stop (EV_A_ (W)w);	1661	ev_stop (EV_A_ (W)w);
1109	}	1662	}
1110		1663
1111	void	1664	void noinline
1112	ev_timer_again (EV_P_ struct ev_timer *w)	1665	ev_timer_again (EV_P_ ev_timer *w)
1113	{	1666	{
1114	if (ev_is_active (w))	1667	if (ev_is_active (w))
1115	{	1668	{
1116	if (w->repeat)	1669	if (w->repeat)
1117	{	1670	{
1118	w->at = mn_now + w->repeat;	1671	((WT)w)->at = mn_now + w->repeat;
1119	downheap ((WT *)timers, timercnt, w->active - 1);	1672	adjustheap (timers, timercnt, ((W)w)->active - 1);
1120	}	1673	}
1121	else	1674	else
1122	ev_timer_stop (EV_A_ w);	1675	ev_timer_stop (EV_A_ w);
1123	}	1676	}
1124	else if (w->repeat)	1677	else if (w->repeat)
		1678	{
		1679	w->at = w->repeat;
1125	ev_timer_start (EV_A_ w);	1680	ev_timer_start (EV_A_ w);
		1681	}
1126	}	1682	}
1127		1683
1128	void	1684	#if EV_PERIODIC_ENABLE
		1685	void noinline
1129	ev_periodic_start (EV_P_ struct ev_periodic *w)	1686	ev_periodic_start (EV_P_ ev_periodic *w)
1130	{	1687	{
1131	if (ev_is_active (w))	1688	if (expect_false (ev_is_active (w)))
1132	return;	1689	return;
1133		1690
		1691	if (w->reschedule_cb)
		1692	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1693	else if (w->interval)
		1694	{
1134	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1695	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1135
1136	/* this formula differs from the one in periodic_reify because we do not always round up */	1696	/* this formula differs from the one in periodic_reify because we do not always round up */
1137	if (w->interval)
1138	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;	1697	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1698	}
		1699	else
		1700	((WT)w)->at = w->offset;
1139		1701
1140	ev_start (EV_A_ (W)w, ++periodiccnt);	1702	ev_start (EV_A_ (W)w, ++periodiccnt);
1141	array_needsize (periodics, periodicmax, periodiccnt, );	1703	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
1142	periodics [periodiccnt - 1] = w;	1704	periodics [periodiccnt - 1] = (WT)w;
1143	upheap ((WT *)periodics, periodiccnt - 1);	1705	upheap (periodics, periodiccnt - 1);
1144	}
1145		1706
1146	void	1707	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1708	}
		1709
		1710	void noinline
1147	ev_periodic_stop (EV_P_ struct ev_periodic *w)	1711	ev_periodic_stop (EV_P_ ev_periodic *w)
1148	{	1712	{
1149	ev_clear_pending (EV_A_ (W)w);	1713	clear_pending (EV_A_ (W)w);
1150	if (!ev_is_active (w))	1714	if (expect_false (!ev_is_active (w)))
1151	return;	1715	return;
1152		1716
1153	if (w->active < periodiccnt--)	1717	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
		1718
		1719	{
		1720	int active = ((W)w)->active;
		1721
		1722	if (expect_true (--active < --periodiccnt))
1154	{	1723	{
1155	periodics [w->active - 1] = periodics [periodiccnt];	1724	periodics [active] = periodics [periodiccnt];
1156	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1725	adjustheap (periodics, periodiccnt, active);
1157	}	1726	}
		1727	}
1158		1728
1159	ev_stop (EV_A_ (W)w);	1729	ev_stop (EV_A_ (W)w);
1160	}	1730	}
1161		1731
1162	void	1732	void noinline
1163	ev_idle_start (EV_P_ struct ev_idle *w)	1733	ev_periodic_again (EV_P_ ev_periodic *w)
1164	{	1734	{
1165	if (ev_is_active (w))	1735	/* TODO: use adjustheap and recalculation */
1166	return;
1167
1168	ev_start (EV_A_ (W)w, ++idlecnt);
1169	array_needsize (idles, idlemax, idlecnt, );
1170	idles [idlecnt - 1] = w;
1171	}
1172
1173	void
1174	ev_idle_stop (EV_P_ struct ev_idle *w)
1175	{
1176	ev_clear_pending (EV_A_ (W)w);
1177	if (ev_is_active (w))
1178	return;
1179
1180	idles [w->active - 1] = idles [--idlecnt];
1181	ev_stop (EV_A_ (W)w);	1736	ev_periodic_stop (EV_A_ w);
		1737	ev_periodic_start (EV_A_ w);
1182	}	1738	}
1183		1739	#endif
1184	void
1185	ev_prepare_start (EV_P_ struct ev_prepare *w)
1186	{
1187	if (ev_is_active (w))
1188	return;
1189
1190	ev_start (EV_A_ (W)w, ++preparecnt);
1191	array_needsize (prepares, preparemax, preparecnt, );
1192	prepares [preparecnt - 1] = w;
1193	}
1194
1195	void
1196	ev_prepare_stop (EV_P_ struct ev_prepare *w)
1197	{
1198	ev_clear_pending (EV_A_ (W)w);
1199	if (ev_is_active (w))
1200	return;
1201
1202	prepares [w->active - 1] = prepares [--preparecnt];
1203	ev_stop (EV_A_ (W)w);
1204	}
1205
1206	void
1207	ev_check_start (EV_P_ struct ev_check *w)
1208	{
1209	if (ev_is_active (w))
1210	return;
1211
1212	ev_start (EV_A_ (W)w, ++checkcnt);
1213	array_needsize (checks, checkmax, checkcnt, );
1214	checks [checkcnt - 1] = w;
1215	}
1216
1217	void
1218	ev_check_stop (EV_P_ struct ev_check *w)
1219	{
1220	ev_clear_pending (EV_A_ (W)w);
1221	if (ev_is_active (w))
1222	return;
1223
1224	checks [w->active - 1] = checks [--checkcnt];
1225	ev_stop (EV_A_ (W)w);
1226	}
1227		1740
1228	#ifndef SA_RESTART	1741	#ifndef SA_RESTART
1229	# define SA_RESTART 0	1742	# define SA_RESTART 0
1230	#endif	1743	#endif
1231		1744
1232	void	1745	void noinline
1233	ev_signal_start (EV_P_ struct ev_signal *w)	1746	ev_signal_start (EV_P_ ev_signal *w)
1234	{	1747	{
1235	#if EV_MULTIPLICITY	1748	#if EV_MULTIPLICITY
1236	assert (("signal watchers are only supported in the default loop", loop == default_loop));	1749	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1237	#endif	1750	#endif
1238	if (ev_is_active (w))	1751	if (expect_false (ev_is_active (w)))
1239	return;	1752	return;
1240		1753
1241	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1754	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1242		1755
		1756	{
		1757	#ifndef _WIN32
		1758	sigset_t full, prev;
		1759	sigfillset (&full);
		1760	sigprocmask (SIG_SETMASK, &full, &prev);
		1761	#endif
		1762
		1763	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1764
		1765	#ifndef _WIN32
		1766	sigprocmask (SIG_SETMASK, &prev, 0);
		1767	#endif
		1768	}
		1769
1243	ev_start (EV_A_ (W)w, 1);	1770	ev_start (EV_A_ (W)w, 1);
1244	array_needsize (signals, signalmax, w->signum, signals_init);
1245	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1771	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1246		1772
1247	if (!w->next)	1773	if (!((WL)w)->next)
1248	{	1774	{
		1775	#if _WIN32
		1776	signal (w->signum, sighandler);
		1777	#else
1249	struct sigaction sa;	1778	struct sigaction sa;
1250	sa.sa_handler = sighandler;	1779	sa.sa_handler = sighandler;
1251	sigfillset (&sa.sa_mask);	1780	sigfillset (&sa.sa_mask);
1252	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	1781	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1253	sigaction (w->signum, &sa, 0);	1782	sigaction (w->signum, &sa, 0);
		1783	#endif
1254	}	1784	}
1255	}	1785	}
1256		1786
1257	void	1787	void noinline
1258	ev_signal_stop (EV_P_ struct ev_signal *w)	1788	ev_signal_stop (EV_P_ ev_signal *w)
1259	{	1789	{
1260	ev_clear_pending (EV_A_ (W)w);	1790	clear_pending (EV_A_ (W)w);
1261	if (!ev_is_active (w))	1791	if (expect_false (!ev_is_active (w)))
1262	return;	1792	return;
1263		1793
1264	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1794	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1265	ev_stop (EV_A_ (W)w);	1795	ev_stop (EV_A_ (W)w);
1266		1796
1267	if (!signals [w->signum - 1].head)	1797	if (!signals [w->signum - 1].head)
1268	signal (w->signum, SIG_DFL);	1798	signal (w->signum, SIG_DFL);
1269	}	1799	}
1270		1800
1271	void	1801	void
1272	ev_child_start (EV_P_ struct ev_child *w)	1802	ev_child_start (EV_P_ ev_child *w)
1273	{	1803	{
1274	#if EV_MULTIPLICITY	1804	#if EV_MULTIPLICITY
1275	assert (("child watchers are only supported in the default loop", loop == default_loop));	1805	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1276	#endif	1806	#endif
1277	if (ev_is_active (w))	1807	if (expect_false (ev_is_active (w)))
1278	return;	1808	return;
1279		1809
1280	ev_start (EV_A_ (W)w, 1);	1810	ev_start (EV_A_ (W)w, 1);
1281	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1811	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1282	}	1812	}
1283		1813
1284	void	1814	void
1285	ev_child_stop (EV_P_ struct ev_child *w)	1815	ev_child_stop (EV_P_ ev_child *w)
1286	{	1816	{
1287	ev_clear_pending (EV_A_ (W)w);	1817	clear_pending (EV_A_ (W)w);
1288	if (ev_is_active (w))	1818	if (expect_false (!ev_is_active (w)))
1289	return;	1819	return;
1290		1820
1291	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1821	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1292	ev_stop (EV_A_ (W)w);	1822	ev_stop (EV_A_ (W)w);
1293	}	1823	}
1294		1824
		1825	#if EV_STAT_ENABLE
		1826
		1827	# ifdef _WIN32
		1828	# undef lstat
		1829	# define lstat(a,b) _stati64 (a,b)
		1830	# endif
		1831
		1832	#define DEF_STAT_INTERVAL 5.0074891
		1833	#define MIN_STAT_INTERVAL 0.1074891
		1834
		1835	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1836
		1837	#if EV_USE_INOTIFY
		1838	# define EV_INOTIFY_BUFSIZE 8192
		1839
		1840	static void noinline
		1841	infy_add (EV_P_ ev_stat *w)
		1842	{
		1843	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);
		1844
		1845	if (w->wd < 0)
		1846	{
		1847	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1848
		1849	/* monitor some parent directory for speedup hints */
		1850	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1851	{
		1852	char path [4096];
		1853	strcpy (path, w->path);
		1854
		1855	do
		1856	{
		1857	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1858	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1859
		1860	char *pend = strrchr (path, '/');
		1861
		1862	if (!pend)
		1863	break; /* whoops, no '/', complain to your admin */
		1864
		1865	*pend = 0;
		1866	w->wd = inotify_add_watch (fs_fd, path, mask);
		1867	}
		1868	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1869	}
		1870	}
		1871	else
		1872	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1873
		1874	if (w->wd >= 0)
		1875	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1876	}
		1877
		1878	static void noinline
		1879	infy_del (EV_P_ ev_stat *w)
		1880	{
		1881	int slot;
		1882	int wd = w->wd;
		1883
		1884	if (wd < 0)
		1885	return;
		1886
		1887	w->wd = -2;
		1888	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1889	wlist_del (&fs_hash [slot].head, (WL)w);
		1890
		1891	/* remove this watcher, if others are watching it, they will rearm */
		1892	inotify_rm_watch (fs_fd, wd);
		1893	}
		1894
		1895	static void noinline
		1896	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1897	{
		1898	if (slot < 0)
		1899	/* overflow, need to check for all hahs slots */
		1900	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1901	infy_wd (EV_A_ slot, wd, ev);
		1902	else
		1903	{
		1904	WL w_;
		1905
		1906	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1907	{
		1908	ev_stat *w = (ev_stat *)w_;
		1909	w_ = w_->next; /* lets us remove this watcher and all before it */
		1910
		1911	if (w->wd == wd || wd == -1)
		1912	{
		1913	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		1914	{
		1915	w->wd = -1;
		1916	infy_add (EV_A_ w); /* re-add, no matter what */
		1917	}
		1918
		1919	stat_timer_cb (EV_A_ &w->timer, 0);
		1920	}
		1921	}
		1922	}
		1923	}
		1924
		1925	static void
		1926	infy_cb (EV_P_ ev_io *w, int revents)
		1927	{
		1928	char buf [EV_INOTIFY_BUFSIZE];
		1929	struct inotify_event *ev = (struct inotify_event *)buf;
		1930	int ofs;
		1931	int len = read (fs_fd, buf, sizeof (buf));
		1932
		1933	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1934	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1935	}
		1936
		1937	void inline_size
		1938	infy_init (EV_P)
		1939	{
		1940	if (fs_fd != -2)
		1941	return;
		1942
		1943	fs_fd = inotify_init ();
		1944
		1945	if (fs_fd >= 0)
		1946	{
		1947	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1948	ev_set_priority (&fs_w, EV_MAXPRI);
		1949	ev_io_start (EV_A_ &fs_w);
		1950	}
		1951	}
		1952
		1953	void inline_size
		1954	infy_fork (EV_P)
		1955	{
		1956	int slot;
		1957
		1958	if (fs_fd < 0)
		1959	return;
		1960
		1961	close (fs_fd);
		1962	fs_fd = inotify_init ();
		1963
		1964	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1965	{
		1966	WL w_ = fs_hash [slot].head;
		1967	fs_hash [slot].head = 0;
		1968
		1969	while (w_)
		1970	{
		1971	ev_stat *w = (ev_stat *)w_;
		1972	w_ = w_->next; /* lets us add this watcher */
		1973
		1974	w->wd = -1;
		1975
		1976	if (fs_fd >= 0)
		1977	infy_add (EV_A_ w); /* re-add, no matter what */
		1978	else
		1979	ev_timer_start (EV_A_ &w->timer);
		1980	}
		1981
		1982	}
		1983	}
		1984
		1985	#endif
		1986
		1987	void
		1988	ev_stat_stat (EV_P_ ev_stat *w)
		1989	{
		1990	if (lstat (w->path, &w->attr) < 0)
		1991	w->attr.st_nlink = 0;
		1992	else if (!w->attr.st_nlink)
		1993	w->attr.st_nlink = 1;
		1994	}
		1995
		1996	static void noinline
		1997	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1998	{
		1999	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2000
		2001	/* we copy this here each the time so that */
		2002	/* prev has the old value when the callback gets invoked */
		2003	w->prev = w->attr;
		2004	ev_stat_stat (EV_A_ w);
		2005
		2006	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2007	if (
		2008	w->prev.st_dev != w->attr.st_dev
		2009	|| w->prev.st_ino != w->attr.st_ino
		2010	|| w->prev.st_mode != w->attr.st_mode
		2011	|| w->prev.st_nlink != w->attr.st_nlink
		2012	|| w->prev.st_uid != w->attr.st_uid
		2013	|| w->prev.st_gid != w->attr.st_gid
		2014	|| w->prev.st_rdev != w->attr.st_rdev
		2015	|| w->prev.st_size != w->attr.st_size
		2016	|| w->prev.st_atime != w->attr.st_atime
		2017	|| w->prev.st_mtime != w->attr.st_mtime
		2018	|| w->prev.st_ctime != w->attr.st_ctime
		2019	) {
		2020	#if EV_USE_INOTIFY
		2021	infy_del (EV_A_ w);
		2022	infy_add (EV_A_ w);
		2023	ev_stat_stat (EV_A_ w); /* avoid race... */
		2024	#endif
		2025
		2026	ev_feed_event (EV_A_ w, EV_STAT);
		2027	}
		2028	}
		2029
		2030	void
		2031	ev_stat_start (EV_P_ ev_stat *w)
		2032	{
		2033	if (expect_false (ev_is_active (w)))
		2034	return;
		2035
		2036	/* since we use memcmp, we need to clear any padding data etc. */
		2037	memset (&w->prev, 0, sizeof (ev_statdata));
		2038	memset (&w->attr, 0, sizeof (ev_statdata));
		2039
		2040	ev_stat_stat (EV_A_ w);
		2041
		2042	if (w->interval < MIN_STAT_INTERVAL)
		2043	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2044
		2045	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2046	ev_set_priority (&w->timer, ev_priority (w));
		2047
		2048	#if EV_USE_INOTIFY
		2049	infy_init (EV_A);
		2050
		2051	if (fs_fd >= 0)
		2052	infy_add (EV_A_ w);
		2053	else
		2054	#endif
		2055	ev_timer_start (EV_A_ &w->timer);
		2056
		2057	ev_start (EV_A_ (W)w, 1);
		2058	}
		2059
		2060	void
		2061	ev_stat_stop (EV_P_ ev_stat *w)
		2062	{
		2063	clear_pending (EV_A_ (W)w);
		2064	if (expect_false (!ev_is_active (w)))
		2065	return;
		2066
		2067	#if EV_USE_INOTIFY
		2068	infy_del (EV_A_ w);
		2069	#endif
		2070	ev_timer_stop (EV_A_ &w->timer);
		2071
		2072	ev_stop (EV_A_ (W)w);
		2073	}
		2074	#endif
		2075
		2076	#if EV_IDLE_ENABLE
		2077	void
		2078	ev_idle_start (EV_P_ ev_idle *w)
		2079	{
		2080	if (expect_false (ev_is_active (w)))
		2081	return;
		2082
		2083	pri_adjust (EV_A_ (W)w);
		2084
		2085	{
		2086	int active = ++idlecnt [ABSPRI (w)];
		2087
		2088	++idleall;
		2089	ev_start (EV_A_ (W)w, active);
		2090
		2091	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2092	idles [ABSPRI (w)][active - 1] = w;
		2093	}
		2094	}
		2095
		2096	void
		2097	ev_idle_stop (EV_P_ ev_idle *w)
		2098	{
		2099	clear_pending (EV_A_ (W)w);
		2100	if (expect_false (!ev_is_active (w)))
		2101	return;
		2102
		2103	{
		2104	int active = ((W)w)->active;
		2105
		2106	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2107	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2108
		2109	ev_stop (EV_A_ (W)w);
		2110	--idleall;
		2111	}
		2112	}
		2113	#endif
		2114
		2115	void
		2116	ev_prepare_start (EV_P_ ev_prepare *w)
		2117	{
		2118	if (expect_false (ev_is_active (w)))
		2119	return;
		2120
		2121	ev_start (EV_A_ (W)w, ++preparecnt);
		2122	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2123	prepares [preparecnt - 1] = w;
		2124	}
		2125
		2126	void
		2127	ev_prepare_stop (EV_P_ ev_prepare *w)
		2128	{
		2129	clear_pending (EV_A_ (W)w);
		2130	if (expect_false (!ev_is_active (w)))
		2131	return;
		2132
		2133	{
		2134	int active = ((W)w)->active;
		2135	prepares [active - 1] = prepares [--preparecnt];
		2136	((W)prepares [active - 1])->active = active;
		2137	}
		2138
		2139	ev_stop (EV_A_ (W)w);
		2140	}
		2141
		2142	void
		2143	ev_check_start (EV_P_ ev_check *w)
		2144	{
		2145	if (expect_false (ev_is_active (w)))
		2146	return;
		2147
		2148	ev_start (EV_A_ (W)w, ++checkcnt);
		2149	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2150	checks [checkcnt - 1] = w;
		2151	}
		2152
		2153	void
		2154	ev_check_stop (EV_P_ ev_check *w)
		2155	{
		2156	clear_pending (EV_A_ (W)w);
		2157	if (expect_false (!ev_is_active (w)))
		2158	return;
		2159
		2160	{
		2161	int active = ((W)w)->active;
		2162	checks [active - 1] = checks [--checkcnt];
		2163	((W)checks [active - 1])->active = active;
		2164	}
		2165
		2166	ev_stop (EV_A_ (W)w);
		2167	}
		2168
		2169	#if EV_EMBED_ENABLE
		2170	void noinline
		2171	ev_embed_sweep (EV_P_ ev_embed *w)
		2172	{
		2173	ev_loop (w->loop, EVLOOP_NONBLOCK);
		2174	}
		2175
		2176	static void
		2177	embed_cb (EV_P_ ev_io *io, int revents)
		2178	{
		2179	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2180
		2181	if (ev_cb (w))
		2182	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2183	else
		2184	ev_embed_sweep (loop, w);
		2185	}
		2186
		2187	void
		2188	ev_embed_start (EV_P_ ev_embed *w)
		2189	{
		2190	if (expect_false (ev_is_active (w)))
		2191	return;
		2192
		2193	{
		2194	struct ev_loop *loop = w->loop;
		2195	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2196	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		2197	}
		2198
		2199	ev_set_priority (&w->io, ev_priority (w));
		2200	ev_io_start (EV_A_ &w->io);
		2201
		2202	ev_start (EV_A_ (W)w, 1);
		2203	}
		2204
		2205	void
		2206	ev_embed_stop (EV_P_ ev_embed *w)
		2207	{
		2208	clear_pending (EV_A_ (W)w);
		2209	if (expect_false (!ev_is_active (w)))
		2210	return;
		2211
		2212	ev_io_stop (EV_A_ &w->io);
		2213
		2214	ev_stop (EV_A_ (W)w);
		2215	}
		2216	#endif
		2217
		2218	#if EV_FORK_ENABLE
		2219	void
		2220	ev_fork_start (EV_P_ ev_fork *w)
		2221	{
		2222	if (expect_false (ev_is_active (w)))
		2223	return;
		2224
		2225	ev_start (EV_A_ (W)w, ++forkcnt);
		2226	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2227	forks [forkcnt - 1] = w;
		2228	}
		2229
		2230	void
		2231	ev_fork_stop (EV_P_ ev_fork *w)
		2232	{
		2233	clear_pending (EV_A_ (W)w);
		2234	if (expect_false (!ev_is_active (w)))
		2235	return;
		2236
		2237	{
		2238	int active = ((W)w)->active;
		2239	forks [active - 1] = forks [--forkcnt];
		2240	((W)forks [active - 1])->active = active;
		2241	}
		2242
		2243	ev_stop (EV_A_ (W)w);
		2244	}
		2245	#endif
		2246
1295	/*****************************************************************************/	2247	/*****************************************************************************/
1296		2248
1297	struct ev_once	2249	struct ev_once
1298	{	2250	{
1299	struct ev_io io;	2251	ev_io io;
1300	struct ev_timer to;	2252	ev_timer to;
1301	void (*cb)(int revents, void *arg);	2253	void (*cb)(int revents, void *arg);
1302	void *arg;	2254	void *arg;
1303	};	2255	};
1304		2256
1305	static void	2257	static void
…		…
1308	void (*cb)(int revents, void *arg) = once->cb;	2260	void (*cb)(int revents, void *arg) = once->cb;
1309	void *arg = once->arg;	2261	void *arg = once->arg;
1310		2262
1311	ev_io_stop (EV_A_ &once->io);	2263	ev_io_stop (EV_A_ &once->io);
1312	ev_timer_stop (EV_A_ &once->to);	2264	ev_timer_stop (EV_A_ &once->to);
1313	free (once);	2265	ev_free (once);
1314		2266
1315	cb (revents, arg);	2267	cb (revents, arg);
1316	}	2268	}
1317		2269
1318	static void	2270	static void
1319	once_cb_io (EV_P_ struct ev_io *w, int revents)	2271	once_cb_io (EV_P_ ev_io *w, int revents)
1320	{	2272	{
1321	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2273	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1322	}	2274	}
1323		2275
1324	static void	2276	static void
1325	once_cb_to (EV_P_ struct ev_timer *w, int revents)	2277	once_cb_to (EV_P_ ev_timer *w, int revents)
1326	{	2278	{
1327	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2279	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1328	}	2280	}
1329		2281
1330	void	2282	void
1331	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2283	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1332	{	2284	{
1333	struct ev_once *once = malloc (sizeof (struct ev_once));	2285	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1334		2286
1335	if (!once)	2287	if (expect_false (!once))
		2288	{
1336	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	2289	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1337	else	2290	return;
1338	{	2291	}
		2292
1339	once->cb = cb;	2293	once->cb = cb;
1340	once->arg = arg;	2294	once->arg = arg;
1341		2295
1342	ev_watcher_init (&once->io, once_cb_io);	2296	ev_init (&once->io, once_cb_io);
1343	if (fd >= 0)	2297	if (fd >= 0)
1344	{	2298	{
1345	ev_io_set (&once->io, fd, events);	2299	ev_io_set (&once->io, fd, events);
1346	ev_io_start (EV_A_ &once->io);	2300	ev_io_start (EV_A_ &once->io);
1347	}	2301	}
1348		2302
1349	ev_watcher_init (&once->to, once_cb_to);	2303	ev_init (&once->to, once_cb_to);
1350	if (timeout >= 0.)	2304	if (timeout >= 0.)
1351	{	2305	{
1352	ev_timer_set (&once->to, timeout, 0.);	2306	ev_timer_set (&once->to, timeout, 0.);
1353	ev_timer_start (EV_A_ &once->to);	2307	ev_timer_start (EV_A_ &once->to);
1354	}
1355	}	2308	}
1356	}	2309	}
1357		2310
		2311	#ifdef __cplusplus
		2312	}
		2313	#endif
		2314

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