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Comparing libev/ev.c (file contents):
Revision 1.5 by root, Tue Oct 30 23:54:38 2007 UTC vs.
Revision 1.148 by root, Tue Nov 27 11:11:13 2007 UTC

		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without
		8	* modification, are permitted provided that the following conditions are
		9	* met:
		10	*
		11	* * Redistributions of source code must retain the above copyright
		12	* notice, this list of conditions and the following disclaimer.
		13	*
		14	* * Redistributions in binary form must reproduce the above
		15	* copyright notice, this list of conditions and the following
		16	* disclaimer in the documentation and/or other materials provided
		17	* with the distribution.
		18	*
		19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
		22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
		23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
		24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
		25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		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.
		30	*/
		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
		37	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
		40	# include "config.h"
		41	# endif
		42
		43	# if HAVE_CLOCK_GETTIME
		44	# ifndef EV_USE_MONOTONIC
		45	# define EV_USE_MONOTONIC 1
		46	# endif
		47	# ifndef EV_USE_REALTIME
		48	# define EV_USE_REALTIME 1
		49	# endif
		50	# else
		51	# ifndef EV_USE_MONOTONIC
		52	# define EV_USE_MONOTONIC 0
		53	# endif
		54	# ifndef EV_USE_REALTIME
		55	# define EV_USE_REALTIME 0
		56	# endif
		57	# endif
		58
		59	# ifndef EV_USE_SELECT
		60	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		61	# define EV_USE_SELECT 1
		62	# else
		63	# define EV_USE_SELECT 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_POLL
		68	# if HAVE_POLL && HAVE_POLL_H
		69	# define EV_USE_POLL 1
		70	# else
		71	# define EV_USE_POLL 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_EPOLL
		76	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		77	# define EV_USE_EPOLL 1
		78	# else
		79	# define EV_USE_EPOLL 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_KQUEUE
		84	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		85	# define EV_USE_KQUEUE 1
		86	# else
		87	# define EV_USE_KQUEUE 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_PORT
		92	# if HAVE_PORT_H && HAVE_PORT_CREATE
		93	# define EV_USE_PORT 1
		94	# else
		95	# define EV_USE_PORT 0
		96	# endif
		97	# endif
		98
		99	#endif
		100
1	#include <math.h>	101	#include <math.h>
2	#include <stdlib.h>	102	#include <stdlib.h>
		103	#include <fcntl.h>
		104	#include <stddef.h>
3		105
4	#include <stdio.h>	106	#include <stdio.h>
5		107
6	#include <assert.h>	108	#include <assert.h>
7	#include <errno.h>	109	#include <errno.h>
8	#include <sys/time.h>	110	#include <sys/types.h>
9	#include <time.h>	111	#include <time.h>
10		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
		129	#ifndef EV_USE_MONOTONIC
		130	# define EV_USE_MONOTONIC 0
		131	#endif
		132
		133	#ifndef EV_USE_REALTIME
		134	# define EV_USE_REALTIME 0
		135	#endif
		136
		137	#ifndef EV_USE_SELECT
		138	# define EV_USE_SELECT 1
		139	#endif
		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
		149	#ifndef EV_USE_EPOLL
		150	# define EV_USE_EPOLL 0
		151	#endif
		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	/**/
		162
11	#ifdef CLOCK_MONOTONIC	163	#ifndef CLOCK_MONOTONIC
		164	# undef EV_USE_MONOTONIC
12	# define HAVE_MONOTONIC 1	165	# define EV_USE_MONOTONIC 0
13	#endif	166	#endif
14		167
15	#define HAVE_EPOLL 1	168	#ifndef CLOCK_REALTIME
		169	# undef EV_USE_REALTIME
16	#define HAVE_REALTIME 1	170	# define EV_USE_REALTIME 0
17	#define HAVE_SELECT 1	171	#endif
		172
		173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
		175	#endif
		176
		177	/**/
18		178
19	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	179	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
20	#define MAX_BLOCKTIME 60.	180	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		181	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		182	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
21		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
22	#include "ev.h"	187	# include "ev.h"
		188	#endif
23		189
24	struct ev_watcher {	190	#if __GNUC__ >= 3
25	EV_WATCHER (ev_watcher);	191	# define expect(expr,value) __builtin_expect ((expr),(value))
26	};	192	# define inline_size static inline /* inline for codesize */
		193	# if EV_MINIMAL
		194	# define noinline __attribute__ ((noinline))
		195	# define inline_speed static noinline
		196	# else
		197	# define noinline
		198	# define inline_speed static inline
		199	# endif
		200	#else
		201	# define expect(expr,value) (expr)
		202	# define inline_speed static
		203	# define inline_size static
		204	# define noinline
		205	#endif
27		206
28	struct ev_watcher_list {	207	#define expect_false(expr) expect ((expr) != 0, 0)
29	EV_WATCHER_LIST (ev_watcher_list);	208	#define expect_true(expr) expect ((expr) != 0, 1)
30	};
31		209
32	static ev_tstamp now, diff; /* monotonic clock */	210	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		211	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		212
		213	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		214	#define EMPTY2(a,b) /* used to suppress some warnings */
		215
		216	typedef ev_watcher *W;
		217	typedef ev_watcher_list *WL;
		218	typedef ev_watcher_time *WT;
		219
		220	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		221
		222	#ifdef _WIN32
		223	# include "ev_win32.c"
		224	#endif
		225
		226	/*****************************************************************************/
		227
		228	static void (*syserr_cb)(const char *msg);
		229
		230	void
		231	ev_set_syserr_cb (void (*cb)(const char *msg))
		232	{
		233	syserr_cb = cb;
		234	}
		235
		236	static void noinline
		237	syserr (const char *msg)
		238	{
		239	if (!msg)
		240	msg = "(libev) system error";
		241
		242	if (syserr_cb)
		243	syserr_cb (msg);
		244	else
		245	{
		246	perror (msg);
		247	abort ();
		248	}
		249	}
		250
		251	static void *(*alloc)(void *ptr, long size);
		252
		253	void
		254	ev_set_allocator (void *(*cb)(void *ptr, long size))
		255	{
		256	alloc = cb;
		257	}
		258
		259	static void *
		260	ev_realloc (void *ptr, long size)
		261	{
		262	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		263
		264	if (!ptr && size)
		265	{
		266	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		267	abort ();
		268	}
		269
		270	return ptr;
		271	}
		272
		273	#define ev_malloc(size) ev_realloc (0, (size))
		274	#define ev_free(ptr) ev_realloc ((ptr), 0)
		275
		276	/*****************************************************************************/
		277
		278	typedef struct
		279	{
		280	WL head;
		281	unsigned char events;
		282	unsigned char reify;
		283	#if EV_SELECT_IS_WINSOCKET
		284	SOCKET handle;
		285	#endif
		286	} ANFD;
		287
		288	typedef struct
		289	{
		290	W w;
		291	int events;
		292	} ANPENDING;
		293
		294	#if EV_MULTIPLICITY
		295
		296	struct ev_loop
		297	{
		298	ev_tstamp ev_rt_now;
		299	#define ev_rt_now ((loop)->ev_rt_now)
		300	#define VAR(name,decl) decl;
		301	#include "ev_vars.h"
		302	#undef VAR
		303	};
		304	#include "ev_wrap.h"
		305
		306	static struct ev_loop default_loop_struct;
		307	struct ev_loop *ev_default_loop_ptr;
		308
		309	#else
		310
33	ev_tstamp ev_now;	311	ev_tstamp ev_rt_now;
34	int ev_method;	312	#define VAR(name,decl) static decl;
		313	#include "ev_vars.h"
		314	#undef VAR
35		315
36	static int have_monotonic; /* runtime */	316	static int ev_default_loop_ptr;
37		317
38	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	318	#endif
39	static void (*method_modify)(int fd, int oev, int nev);	319
40	static void (*method_poll)(ev_tstamp timeout);	320	/*****************************************************************************/
41		321
42	ev_tstamp	322	ev_tstamp
43	ev_time (void)	323	ev_time (void)
44	{	324	{
45	#if HAVE_REALTIME	325	#if EV_USE_REALTIME
46	struct timespec ts;	326	struct timespec ts;
47	clock_gettime (CLOCK_REALTIME, &ts);	327	clock_gettime (CLOCK_REALTIME, &ts);
48	return ts.tv_sec + ts.tv_nsec * 1e-9;	328	return ts.tv_sec + ts.tv_nsec * 1e-9;
49	#else	329	#else
50	struct timeval tv;	330	struct timeval tv;
51	gettimeofday (&tv, 0);	331	gettimeofday (&tv, 0);
52	return tv.tv_sec + tv.tv_usec * 1e-6;	332	return tv.tv_sec + tv.tv_usec * 1e-6;
53	#endif	333	#endif
54	}	334	}
55		335
56	static ev_tstamp	336	ev_tstamp inline_size
57	get_clock (void)	337	get_clock (void)
58	{	338	{
59	#if HAVE_MONOTONIC	339	#if EV_USE_MONOTONIC
60	if (have_monotonic)	340	if (expect_true (have_monotonic))
61	{	341	{
62	struct timespec ts;	342	struct timespec ts;
63	clock_gettime (CLOCK_MONOTONIC, &ts);	343	clock_gettime (CLOCK_MONOTONIC, &ts);
64	return ts.tv_sec + ts.tv_nsec * 1e-9;	344	return ts.tv_sec + ts.tv_nsec * 1e-9;
65	}	345	}
66	#endif	346	#endif
67		347
68	return ev_time ();	348	return ev_time ();
69	}	349	}
70		350
		351	#if EV_MULTIPLICITY
		352	ev_tstamp
		353	ev_now (EV_P)
		354	{
		355	return ev_rt_now;
		356	}
		357	#endif
		358
		359	#define array_roundsize(type,n) (((n) | 4) & ~3)
		360
71	#define array_needsize(base,cur,cnt,init) \	361	#define array_needsize(type,base,cur,cnt,init) \
72	if ((cnt) > cur) \	362	if (expect_false ((cnt) > cur)) \
73	{ \	363	{ \
74	int newcnt = cur ? cur << 1 : 16; \	364	int newcnt = cur; \
75	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	365	do \
		366	{ \
		367	newcnt = array_roundsize (type, newcnt << 1); \
		368	} \
		369	while ((cnt) > newcnt); \
		370	\
76	base = realloc (base, sizeof (*base) * (newcnt)); \	371	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
77	init (base + cur, newcnt - cur); \	372	init (base + cur, newcnt - cur); \
78	cur = newcnt; \	373	cur = newcnt; \
		374	}
		375
		376	#define array_slim(type,stem) \
		377	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		378	{ \
		379	stem ## max = array_roundsize (stem ## cnt >> 1); \
		380	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		381	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		382	}
		383
		384	#define array_free(stem, idx) \
		385	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		386
		387	/*****************************************************************************/
		388
		389	void noinline
		390	ev_feed_event (EV_P_ void *w, int revents)
		391	{
		392	W w_ = (W)w;
		393
		394	if (expect_false (w_->pending))
79	}	395	{
		396	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		397	return;
		398	}
80		399
81	typedef struct	400	w_->pending = ++pendingcnt [ABSPRI (w_)];
82	{	401	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
83	struct ev_io *head;	402	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
84	unsigned char wev, rev; /* want, received event set */	403	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
85	} ANFD;	404	}
86		405
87	static ANFD *anfds;	406	void inline_size
88	static int anfdmax;	407	queue_events (EV_P_ W *events, int eventcnt, int type)
		408	{
		409	int i;
89		410
90	static int *fdchanges;	411	for (i = 0; i < eventcnt; ++i)
91	static int fdchangemax, fdchangecnt;	412	ev_feed_event (EV_A_ events [i], type);
		413	}
92		414
93	static void	415	/*****************************************************************************/
		416
		417	void inline_size
94	anfds_init (ANFD *base, int count)	418	anfds_init (ANFD *base, int count)
95	{	419	{
96	while (count--)	420	while (count--)
97	{	421	{
98	base->head = 0;	422	base->head = 0;
99	base->wev = base->rev = EV_NONE;	423	base->events = EV_NONE;
		424	base->reify = 0;
		425
100	++base;	426	++base;
101	}	427	}
102	}	428	}
103		429
104	typedef struct	430	void inline_speed
105	{
106	struct ev_watcher *w;
107	int events;
108	} ANPENDING;
109
110	static ANPENDING *pendings;
111	static int pendingmax, pendingcnt;
112
113	static void
114	event (struct ev_watcher *w, int events)
115	{
116	w->pending = ++pendingcnt;
117	array_needsize (pendings, pendingmax, pendingcnt, );
118	pendings [pendingcnt - 1].w = w;
119	pendings [pendingcnt - 1].events = events;
120	}
121
122	static void
123	fd_event (int fd, int events)	431	fd_event (EV_P_ int fd, int revents)
124	{	432	{
125	ANFD *anfd = anfds + fd;	433	ANFD *anfd = anfds + fd;
126	struct ev_io *w;	434	ev_io *w;
127		435
128	for (w = anfd->head; w; w = w->next)	436	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
129	{	437	{
130	int ev = w->events & events;	438	int ev = w->events & revents;
131		439
132	if (ev)	440	if (ev)
133	event ((struct ev_watcher *)w, ev);	441	ev_feed_event (EV_A_ (W)w, ev);
134	}
135	}
136
137	static struct ev_timer **atimers;
138	static int atimermax, atimercnt;
139
140	static struct ev_timer **rtimers;
141	static int rtimermax, rtimercnt;
142
143	static void
144	upheap (struct ev_timer **timers, int k)
145	{
146	struct ev_timer *w = timers [k];
147
148	while (k && timers [k >> 1]->at > w->at)
149	{	442	}
150	timers [k] = timers [k >> 1];
151	timers [k]->active = k + 1;
152	k >>= 1;
153	}
154
155	timers [k] = w;
156	timers [k]->active = k + 1;
157
158	}	443	}
159		444
160	static void	445	void
161	downheap (struct ev_timer **timers, int N, int k)	446	ev_feed_fd_event (EV_P_ int fd, int revents)
162	{	447	{
163	struct ev_timer *w = timers [k];	448	fd_event (EV_A_ fd, revents);
164
165	while (k < (N >> 1))
166	{
167	int j = k << 1;
168
169	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
170	++j;
171
172	if (w->at <= timers [j]->at)
173	break;
174
175	timers [k] = timers [j];
176	timers [k]->active = k + 1;
177	k = j;
178	}
179
180	timers [k] = w;
181	timers [k]->active = k + 1;
182	}	449	}
183		450
184	static struct ev_signal **signals;	451	void inline_size
185	static int signalmax;	452	fd_reify (EV_P)
186
187	static void
188	signals_init (struct ev_signal **base, int count)
189	{
190	while (count--)
191	*base++ = 0;
192	}
193
194	#if HAVE_EPOLL
195	# include "ev_epoll.c"
196	#endif
197	#if HAVE_SELECT
198	# include "ev_select.c"
199	#endif
200
201	int ev_init (int flags)
202	{
203	#if HAVE_MONOTONIC
204	{
205	struct timespec ts;
206	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
207	have_monotonic = 1;
208	}
209	#endif
210
211	ev_now = ev_time ();
212	now = get_clock ();
213	diff = ev_now - now;
214
215	#if HAVE_EPOLL
216	if (epoll_init (flags))
217	return ev_method;
218	#endif
219	#if HAVE_SELECT
220	if (select_init (flags))
221	return ev_method;
222	#endif
223
224	ev_method = EVMETHOD_NONE;
225	return ev_method;
226	}
227
228	void ev_prefork (void)
229	{
230	}
231
232	void ev_postfork_parent (void)
233	{
234	}
235
236	void ev_postfork_child (void)
237	{
238	#if HAVE_EPOLL
239	if (ev_method == EVMETHOD_EPOLL)
240	epoll_postfork_child ();
241	#endif
242	}
243
244	static void
245	fd_reify (void)
246	{	453	{
247	int i;	454	int i;
248		455
249	for (i = 0; i < fdchangecnt; ++i)	456	for (i = 0; i < fdchangecnt; ++i)
250	{	457	{
251	int fd = fdchanges [i];	458	int fd = fdchanges [i];
252	ANFD *anfd = anfds + fd;	459	ANFD *anfd = anfds + fd;
253	struct ev_io *w;	460	ev_io *w;
254		461
255	int wev = 0;	462	int events = 0;
256		463
257	for (w = anfd->head; w; w = w->next)	464	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
258	wev |= w->events;	465	events |= w->events;
259		466
260	if (anfd->wev != wev)	467	#if EV_SELECT_IS_WINSOCKET
		468	if (events)
261	{	469	{
262	method_modify (fd, anfd->wev, wev);	470	unsigned long argp;
263	anfd->wev = wev;	471	anfd->handle = _get_osfhandle (fd);
		472	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
264	}	473	}
		474	#endif
		475
		476	anfd->reify = 0;
		477
		478	backend_modify (EV_A_ fd, anfd->events, events);
		479	anfd->events = events;
265	}	480	}
266		481
267	fdchangecnt = 0;	482	fdchangecnt = 0;
268	}	483	}
269		484
		485	void inline_size
		486	fd_change (EV_P_ int fd)
		487	{
		488	if (expect_false (anfds [fd].reify))
		489	return;
		490
		491	anfds [fd].reify = 1;
		492
		493	++fdchangecnt;
		494	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		495	fdchanges [fdchangecnt - 1] = fd;
		496	}
		497
		498	void inline_speed
		499	fd_kill (EV_P_ int fd)
		500	{
		501	ev_io *w;
		502
		503	while ((w = (ev_io *)anfds [fd].head))
		504	{
		505	ev_io_stop (EV_A_ w);
		506	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		507	}
		508	}
		509
		510	int inline_size
		511	fd_valid (int fd)
		512	{
		513	#ifdef _WIN32
		514	return _get_osfhandle (fd) != -1;
		515	#else
		516	return fcntl (fd, F_GETFD) != -1;
		517	#endif
		518	}
		519
		520	/* called on EBADF to verify fds */
		521	static void noinline
		522	fd_ebadf (EV_P)
		523	{
		524	int fd;
		525
		526	for (fd = 0; fd < anfdmax; ++fd)
		527	if (anfds [fd].events)
		528	if (!fd_valid (fd) == -1 && errno == EBADF)
		529	fd_kill (EV_A_ fd);
		530	}
		531
		532	/* called on ENOMEM in select/poll to kill some fds and retry */
		533	static void noinline
		534	fd_enomem (EV_P)
		535	{
		536	int fd;
		537
		538	for (fd = anfdmax; fd--; )
		539	if (anfds [fd].events)
		540	{
		541	fd_kill (EV_A_ fd);
		542	return;
		543	}
		544	}
		545
		546	/* usually called after fork if backend needs to re-arm all fds from scratch */
		547	static void noinline
		548	fd_rearm_all (EV_P)
		549	{
		550	int fd;
		551
		552	/* this should be highly optimised to not do anything but set a flag */
		553	for (fd = 0; fd < anfdmax; ++fd)
		554	if (anfds [fd].events)
		555	{
		556	anfds [fd].events = 0;
		557	fd_change (EV_A_ fd);
		558	}
		559	}
		560
		561	/*****************************************************************************/
		562
		563	void inline_speed
		564	upheap (WT *heap, int k)
		565	{
		566	WT w = heap [k];
		567
		568	while (k && heap [k >> 1]->at > w->at)
		569	{
		570	heap [k] = heap [k >> 1];
		571	((W)heap [k])->active = k + 1;
		572	k >>= 1;
		573	}
		574
		575	heap [k] = w;
		576	((W)heap [k])->active = k + 1;
		577
		578	}
		579
		580	void inline_speed
		581	downheap (WT *heap, int N, int k)
		582	{
		583	WT w = heap [k];
		584
		585	while (k < (N >> 1))
		586	{
		587	int j = k << 1;
		588
		589	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		590	++j;
		591
		592	if (w->at <= heap [j]->at)
		593	break;
		594
		595	heap [k] = heap [j];
		596	((W)heap [k])->active = k + 1;
		597	k = j;
		598	}
		599
		600	heap [k] = w;
		601	((W)heap [k])->active = k + 1;
		602	}
		603
		604	void inline_size
		605	adjustheap (WT *heap, int N, int k)
		606	{
		607	upheap (heap, k);
		608	downheap (heap, N, k);
		609	}
		610
		611	/*****************************************************************************/
		612
		613	typedef struct
		614	{
		615	WL head;
		616	sig_atomic_t volatile gotsig;
		617	} ANSIG;
		618
		619	static ANSIG *signals;
		620	static int signalmax;
		621
		622	static int sigpipe [2];
		623	static sig_atomic_t volatile gotsig;
		624	static ev_io sigev;
		625
		626	void inline_size
		627	signals_init (ANSIG *base, int count)
		628	{
		629	while (count--)
		630	{
		631	base->head = 0;
		632	base->gotsig = 0;
		633
		634	++base;
		635	}
		636	}
		637
270	static void	638	static void
271	call_pending ()	639	sighandler (int signum)
		640	{
		641	#if _WIN32
		642	signal (signum, sighandler);
		643	#endif
		644
		645	signals [signum - 1].gotsig = 1;
		646
		647	if (!gotsig)
		648	{
		649	int old_errno = errno;
		650	gotsig = 1;
		651	write (sigpipe [1], &signum, 1);
		652	errno = old_errno;
		653	}
		654	}
		655
		656	void noinline
		657	ev_feed_signal_event (EV_P_ int signum)
		658	{
		659	WL w;
		660
		661	#if EV_MULTIPLICITY
		662	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		663	#endif
		664
		665	--signum;
		666
		667	if (signum < 0 || signum >= signalmax)
		668	return;
		669
		670	signals [signum].gotsig = 0;
		671
		672	for (w = signals [signum].head; w; w = w->next)
		673	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		674	}
		675
		676	static void
		677	sigcb (EV_P_ ev_io *iow, int revents)
		678	{
		679	int signum;
		680
		681	read (sigpipe [0], &revents, 1);
		682	gotsig = 0;
		683
		684	for (signum = signalmax; signum--; )
		685	if (signals [signum].gotsig)
		686	ev_feed_signal_event (EV_A_ signum + 1);
		687	}
		688
		689	void inline_size
		690	fd_intern (int fd)
		691	{
		692	#ifdef _WIN32
		693	int arg = 1;
		694	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		695	#else
		696	fcntl (fd, F_SETFD, FD_CLOEXEC);
		697	fcntl (fd, F_SETFL, O_NONBLOCK);
		698	#endif
		699	}
		700
		701	static void noinline
		702	siginit (EV_P)
		703	{
		704	fd_intern (sigpipe [0]);
		705	fd_intern (sigpipe [1]);
		706
		707	ev_io_set (&sigev, sigpipe [0], EV_READ);
		708	ev_io_start (EV_A_ &sigev);
		709	ev_unref (EV_A); /* child watcher should not keep loop alive */
		710	}
		711
		712	/*****************************************************************************/
		713
		714	static ev_child *childs [PID_HASHSIZE];
		715
		716	#ifndef _WIN32
		717
		718	static ev_signal childev;
		719
		720	void inline_speed
		721	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		722	{
		723	ev_child *w;
		724
		725	for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		726	if (w->pid == pid || !w->pid)
		727	{
		728	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		729	w->rpid = pid;
		730	w->rstatus = status;
		731	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		732	}
		733	}
		734
		735	#ifndef WCONTINUED
		736	# define WCONTINUED 0
		737	#endif
		738
		739	static void
		740	childcb (EV_P_ ev_signal *sw, int revents)
		741	{
		742	int pid, status;
		743
		744	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
		745	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		746	if (!WCONTINUED
		747	|| errno != EINVAL
		748	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		749	return;
		750
		751	/* make sure we are called again until all childs have been reaped */
		752	/* we need to do it this way so that the callback gets called before we continue */
		753	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		754
		755	child_reap (EV_A_ sw, pid, pid, status);
		756	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		757	}
		758
		759	#endif
		760
		761	/*****************************************************************************/
		762
		763	#if EV_USE_PORT
		764	# include "ev_port.c"
		765	#endif
		766	#if EV_USE_KQUEUE
		767	# include "ev_kqueue.c"
		768	#endif
		769	#if EV_USE_EPOLL
		770	# include "ev_epoll.c"
		771	#endif
		772	#if EV_USE_POLL
		773	# include "ev_poll.c"
		774	#endif
		775	#if EV_USE_SELECT
		776	# include "ev_select.c"
		777	#endif
		778
		779	int
		780	ev_version_major (void)
		781	{
		782	return EV_VERSION_MAJOR;
		783	}
		784
		785	int
		786	ev_version_minor (void)
		787	{
		788	return EV_VERSION_MINOR;
		789	}
		790
		791	/* return true if we are running with elevated privileges and should ignore env variables */
		792	int inline_size
		793	enable_secure (void)
		794	{
		795	#ifdef _WIN32
		796	return 0;
		797	#else
		798	return getuid () != geteuid ()
		799	|| getgid () != getegid ();
		800	#endif
		801	}
		802
		803	unsigned int
		804	ev_supported_backends (void)
		805	{
		806	unsigned int flags = 0;
		807
		808	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		809	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		810	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		811	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		812	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		813
		814	return flags;
		815	}
		816
		817	unsigned int
		818	ev_recommended_backends (void)
		819	{
		820	unsigned int flags = ev_supported_backends ();
		821
		822	#ifndef __NetBSD__
		823	/* kqueue is borked on everything but netbsd apparently */
		824	/* it usually doesn't work correctly on anything but sockets and pipes */
		825	flags &= ~EVBACKEND_KQUEUE;
		826	#endif
		827	#ifdef __APPLE__
		828	// flags &= ~EVBACKEND_KQUEUE; for documentation
		829	flags &= ~EVBACKEND_POLL;
		830	#endif
		831
		832	return flags;
		833	}
		834
		835	unsigned int
		836	ev_embeddable_backends (void)
		837	{
		838	return EVBACKEND_EPOLL
		839	| EVBACKEND_KQUEUE
		840	| EVBACKEND_PORT;
		841	}
		842
		843	unsigned int
		844	ev_backend (EV_P)
		845	{
		846	return backend;
		847	}
		848
		849	static void
		850	loop_init (EV_P_ unsigned int flags)
		851	{
		852	if (!backend)
		853	{
		854	#if EV_USE_MONOTONIC
		855	{
		856	struct timespec ts;
		857	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		858	have_monotonic = 1;
		859	}
		860	#endif
		861
		862	ev_rt_now = ev_time ();
		863	mn_now = get_clock ();
		864	now_floor = mn_now;
		865	rtmn_diff = ev_rt_now - mn_now;
		866
		867	if (!(flags & EVFLAG_NOENV)
		868	&& !enable_secure ()
		869	&& getenv ("LIBEV_FLAGS"))
		870	flags = atoi (getenv ("LIBEV_FLAGS"));
		871
		872	if (!(flags & 0x0000ffffUL))
		873	flags |= ev_recommended_backends ();
		874
		875	backend = 0;
		876	#if EV_USE_PORT
		877	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		878	#endif
		879	#if EV_USE_KQUEUE
		880	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		881	#endif
		882	#if EV_USE_EPOLL
		883	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		884	#endif
		885	#if EV_USE_POLL
		886	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		887	#endif
		888	#if EV_USE_SELECT
		889	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		890	#endif
		891
		892	ev_init (&sigev, sigcb);
		893	ev_set_priority (&sigev, EV_MAXPRI);
		894	}
		895	}
		896
		897	static void
		898	loop_destroy (EV_P)
272	{	899	{
273	int i;	900	int i;
274		901
275	for (i = 0; i < pendingcnt; ++i)	902	#if EV_USE_PORT
		903	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		904	#endif
		905	#if EV_USE_KQUEUE
		906	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		907	#endif
		908	#if EV_USE_EPOLL
		909	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		910	#endif
		911	#if EV_USE_POLL
		912	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		913	#endif
		914	#if EV_USE_SELECT
		915	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		916	#endif
		917
		918	for (i = NUMPRI; i--; )
		919	array_free (pending, [i]);
		920
		921	/* have to use the microsoft-never-gets-it-right macro */
		922	array_free (fdchange, EMPTY0);
		923	array_free (timer, EMPTY0);
		924	#if EV_PERIODIC_ENABLE
		925	array_free (periodic, EMPTY0);
		926	#endif
		927	array_free (idle, EMPTY0);
		928	array_free (prepare, EMPTY0);
		929	array_free (check, EMPTY0);
		930
		931	backend = 0;
		932	}
		933
		934	static void
		935	loop_fork (EV_P)
		936	{
		937	#if EV_USE_PORT
		938	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		939	#endif
		940	#if EV_USE_KQUEUE
		941	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		942	#endif
		943	#if EV_USE_EPOLL
		944	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		945	#endif
		946
		947	if (ev_is_active (&sigev))
		948	{
		949	/* default loop */
		950
		951	ev_ref (EV_A);
		952	ev_io_stop (EV_A_ &sigev);
		953	close (sigpipe [0]);
		954	close (sigpipe [1]);
		955
		956	while (pipe (sigpipe))
		957	syserr ("(libev) error creating pipe");
		958
		959	siginit (EV_A);
276	{	960	}
277	ANPENDING *p = pendings + i;
278		961
279	if (p->w)	962	postfork = 0;
		963	}
		964
		965	#if EV_MULTIPLICITY
		966	struct ev_loop *
		967	ev_loop_new (unsigned int flags)
		968	{
		969	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		970
		971	memset (loop, 0, sizeof (struct ev_loop));
		972
		973	loop_init (EV_A_ flags);
		974
		975	if (ev_backend (EV_A))
		976	return loop;
		977
		978	return 0;
		979	}
		980
		981	void
		982	ev_loop_destroy (EV_P)
		983	{
		984	loop_destroy (EV_A);
		985	ev_free (loop);
		986	}
		987
		988	void
		989	ev_loop_fork (EV_P)
		990	{
		991	postfork = 1;
		992	}
		993
		994	#endif
		995
		996	#if EV_MULTIPLICITY
		997	struct ev_loop *
		998	ev_default_loop_init (unsigned int flags)
		999	#else
		1000	int
		1001	ev_default_loop (unsigned int flags)
		1002	#endif
		1003	{
		1004	if (sigpipe [0] == sigpipe [1])
		1005	if (pipe (sigpipe))
		1006	return 0;
		1007
		1008	if (!ev_default_loop_ptr)
		1009	{
		1010	#if EV_MULTIPLICITY
		1011	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1012	#else
		1013	ev_default_loop_ptr = 1;
		1014	#endif
		1015
		1016	loop_init (EV_A_ flags);
		1017
		1018	if (ev_backend (EV_A))
280	{	1019	{
281	p->w->pending = 0;	1020	siginit (EV_A);
282	p->w->cb (p->w, p->events);	1021
		1022	#ifndef _WIN32
		1023	ev_signal_init (&childev, childcb, SIGCHLD);
		1024	ev_set_priority (&childev, EV_MAXPRI);
		1025	ev_signal_start (EV_A_ &childev);
		1026	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1027	#endif
283	}	1028	}
		1029	else
		1030	ev_default_loop_ptr = 0;
		1031	}
		1032
		1033	return ev_default_loop_ptr;
		1034	}
		1035
		1036	void
		1037	ev_default_destroy (void)
		1038	{
		1039	#if EV_MULTIPLICITY
		1040	struct ev_loop *loop = ev_default_loop_ptr;
		1041	#endif
		1042
		1043	#ifndef _WIN32
		1044	ev_ref (EV_A); /* child watcher */
		1045	ev_signal_stop (EV_A_ &childev);
		1046	#endif
		1047
		1048	ev_ref (EV_A); /* signal watcher */
		1049	ev_io_stop (EV_A_ &sigev);
		1050
		1051	close (sigpipe [0]); sigpipe [0] = 0;
		1052	close (sigpipe [1]); sigpipe [1] = 0;
		1053
		1054	loop_destroy (EV_A);
		1055	}
		1056
		1057	void
		1058	ev_default_fork (void)
		1059	{
		1060	#if EV_MULTIPLICITY
		1061	struct ev_loop *loop = ev_default_loop_ptr;
		1062	#endif
		1063
		1064	if (backend)
		1065	postfork = 1;
		1066	}
		1067
		1068	/*****************************************************************************/
		1069
		1070	int inline_size
		1071	any_pending (EV_P)
		1072	{
		1073	int pri;
		1074
		1075	for (pri = NUMPRI; pri--; )
		1076	if (pendingcnt [pri])
		1077	return 1;
		1078
		1079	return 0;
		1080	}
		1081
		1082	void inline_speed
		1083	call_pending (EV_P)
		1084	{
		1085	int pri;
		1086
		1087	for (pri = NUMPRI; pri--; )
		1088	while (pendingcnt [pri])
		1089	{
		1090	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
		1091
		1092	if (expect_true (p->w))
		1093	{
		1094	assert (("non-pending watcher on pending list", p->w->pending));
		1095
		1096	p->w->pending = 0;
		1097	EV_CB_INVOKE (p->w, p->events);
		1098	}
284	}	1099	}
285
286	pendingcnt = 0;
287	}	1100	}
288		1101
289	static void	1102	void inline_size
290	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	1103	timers_reify (EV_P)
291	{	1104	{
292	while (timercnt && timers [0]->at <= now)	1105	while (timercnt && ((WT)timers [0])->at <= mn_now)
293	{	1106	{
294	struct ev_timer *w = timers [0];	1107	ev_timer *w = timers [0];
		1108
		1109	assert (("inactive timer on timer heap detected", ev_is_active (w)));
295		1110
296	/* first reschedule or stop timer */	1111	/* first reschedule or stop timer */
297	if (w->repeat)	1112	if (w->repeat)
298	{	1113	{
299	if (w->is_abs)	1114	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
300	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;	1115
301	else
302	w->at = now + w->repeat;	1116	((WT)w)->at += w->repeat;
		1117	if (((WT)w)->at < mn_now)
		1118	((WT)w)->at = mn_now;
303		1119
304	assert (w->at > now);
305
306	downheap (timers, timercnt, 0);	1120	downheap ((WT *)timers, timercnt, 0);
307	}	1121	}
308	else	1122	else
		1123	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1124
		1125	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1126	}
		1127	}
		1128
		1129	#if EV_PERIODIC_ENABLE
		1130	void inline_size
		1131	periodics_reify (EV_P)
		1132	{
		1133	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
		1134	{
		1135	ev_periodic *w = periodics [0];
		1136
		1137	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1138
		1139	/* first reschedule or stop timer */
		1140	if (w->reschedule_cb)
309	{	1141	{
310	evtimer_stop (w); /* nonrepeating: stop timer */	1142	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
311	--timercnt; /* maybe pass by reference instead? */	1143	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1144	downheap ((WT *)periodics, periodiccnt, 0);
312	}	1145	}
		1146	else if (w->interval)
		1147	{
		1148	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
		1149	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
		1150	downheap ((WT *)periodics, periodiccnt, 0);
		1151	}
		1152	else
		1153	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
313		1154
314	event ((struct ev_watcher *)w, EV_TIMEOUT);	1155	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
315	}	1156	}
316	}	1157	}
317		1158
318	static void	1159	static void noinline
319	time_update ()	1160	periodics_reschedule (EV_P)
320	{	1161	{
321	int i;	1162	int i;
		1163
		1164	/* adjust periodics after time jump */
		1165	for (i = 0; i < periodiccnt; ++i)
		1166	{
		1167	ev_periodic *w = periodics [i];
		1168
		1169	if (w->reschedule_cb)
		1170	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1171	else if (w->interval)
		1172	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1173	}
		1174
		1175	/* now rebuild the heap */
		1176	for (i = periodiccnt >> 1; i--; )
		1177	downheap ((WT *)periodics, periodiccnt, i);
		1178	}
		1179	#endif
		1180
		1181	int inline_size
		1182	time_update_monotonic (EV_P)
		1183	{
		1184	mn_now = get_clock ();
		1185
		1186	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1187	{
		1188	ev_rt_now = rtmn_diff + mn_now;
		1189	return 0;
		1190	}
		1191	else
		1192	{
		1193	now_floor = mn_now;
322	ev_now = ev_time ();	1194	ev_rt_now = ev_time ();
323		1195	return 1;
324	if (have_monotonic)
325	{	1196	}
326	ev_tstamp odiff = diff;	1197	}
327		1198
328	/* detecting time jumps is much more difficult */	1199	void inline_size
329	for (i = 2; --i; ) /* loop a few times, before making important decisions */	1200	time_update (EV_P)
		1201	{
		1202	int i;
		1203
		1204	#if EV_USE_MONOTONIC
		1205	if (expect_true (have_monotonic))
		1206	{
		1207	if (time_update_monotonic (EV_A))
330	{	1208	{
331	now = get_clock ();	1209	ev_tstamp odiff = rtmn_diff;
		1210
		1211	/* loop a few times, before making important decisions.
		1212	* on the choice of "4": one iteration isn't enough,
		1213	* in case we get preempted during the calls to
		1214	* ev_time and get_clock. a second call is almost guarenteed
		1215	* to succeed in that case, though. and looping a few more times
		1216	* doesn't hurt either as we only do this on time-jumps or
		1217	* in the unlikely event of getting preempted here.
		1218	*/
		1219	for (i = 4; --i; )
		1220	{
332	diff = ev_now - now;	1221	rtmn_diff = ev_rt_now - mn_now;
333		1222
334	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1223	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
335	return; /* all is well */	1224	return; /* all is well */
336		1225
337	ev_now = ev_time ();	1226	ev_rt_now = ev_time ();
		1227	mn_now = get_clock ();
		1228	now_floor = mn_now;
		1229	}
		1230
		1231	# if EV_PERIODIC_ENABLE
		1232	periodics_reschedule (EV_A);
		1233	# endif
		1234	/* no timer adjustment, as the monotonic clock doesn't jump */
		1235	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
338	}	1236	}
		1237	}
		1238	else
		1239	#endif
		1240	{
		1241	ev_rt_now = ev_time ();
339		1242
340	/* time jump detected, reschedule atimers */	1243	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
341	for (i = 0; i < atimercnt; ++i)
342	{	1244	{
343	struct ev_timer *w = atimers [i];	1245	#if EV_PERIODIC_ENABLE
344	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	1246	periodics_reschedule (EV_A);
		1247	#endif
		1248
		1249	/* adjust timers. this is easy, as the offset is the same for all */
		1250	for (i = 0; i < timercnt; ++i)
		1251	((WT)timers [i])->at += ev_rt_now - mn_now;
345	}	1252	}
346	}
347	else
348	{
349	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
350	/* time jump detected, adjust rtimers */
351	for (i = 0; i < rtimercnt; ++i)
352	rtimers [i]->at += ev_now - now;
353		1253
354	now = ev_now;	1254	mn_now = ev_rt_now;
355	}
356	}
357
358	int ev_loop_done;
359
360	void ev_loop (int flags)
361	{
362	double block;
363	ev_loop_done = flags & EVLOOP_ONESHOT;
364
365	do
366	{	1255	}
		1256	}
		1257
		1258	void
		1259	ev_ref (EV_P)
		1260	{
		1261	++activecnt;
		1262	}
		1263
		1264	void
		1265	ev_unref (EV_P)
		1266	{
		1267	--activecnt;
		1268	}
		1269
		1270	static int loop_done;
		1271
		1272	void
		1273	ev_loop (EV_P_ int flags)
		1274	{
		1275	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1276	? EVUNLOOP_ONE
		1277	: EVUNLOOP_CANCEL;
		1278
		1279	while (activecnt)
		1280	{
		1281	/* we might have forked, so reify kernel state if necessary */
		1282	#if EV_FORK_ENABLE
		1283	if (expect_false (postfork))
		1284	if (forkcnt)
		1285	{
		1286	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1287	call_pending (EV_A);
		1288	}
		1289	#endif
		1290
		1291	/* queue check watchers (and execute them) */
		1292	if (expect_false (preparecnt))
		1293	{
		1294	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1295	call_pending (EV_A);
		1296	}
		1297
		1298	/* we might have forked, so reify kernel state if necessary */
		1299	if (expect_false (postfork))
		1300	loop_fork (EV_A);
		1301
367	/* update fd-related kernel structures */	1302	/* update fd-related kernel structures */
368	fd_reify ();	1303	fd_reify (EV_A);
369		1304
370	/* calculate blocking time */	1305	/* calculate blocking time */
		1306	{
		1307	double block;
		1308
371	if (flags & EVLOOP_NONBLOCK)	1309	if (flags & EVLOOP_NONBLOCK || idlecnt)
372	block = 0.;	1310	block = 0.; /* do not block at all */
373	else	1311	else
374	{	1312	{
		1313	/* update time to cancel out callback processing overhead */
		1314	#if EV_USE_MONOTONIC
		1315	if (expect_true (have_monotonic))
		1316	time_update_monotonic (EV_A);
		1317	else
		1318	#endif
		1319	{
		1320	ev_rt_now = ev_time ();
		1321	mn_now = ev_rt_now;
		1322	}
		1323
375	block = MAX_BLOCKTIME;	1324	block = MAX_BLOCKTIME;
376		1325
377	if (rtimercnt)	1326	if (timercnt)
378	{	1327	{
379	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1328	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
380	if (block > to) block = to;	1329	if (block > to) block = to;
381	}	1330	}
382		1331
		1332	#if EV_PERIODIC_ENABLE
383	if (atimercnt)	1333	if (periodiccnt)
384	{	1334	{
385	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1335	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
386	if (block > to) block = to;	1336	if (block > to) block = to;
387	}	1337	}
		1338	#endif
388		1339
389	if (block < 0.) block = 0.;	1340	if (expect_false (block < 0.)) block = 0.;
390	}	1341	}
391		1342
392	method_poll (block);	1343	backend_poll (EV_A_ block);
		1344	}
393		1345
394	/* update ev_now, do magic */	1346	/* update ev_rt_now, do magic */
395	time_update ();	1347	time_update (EV_A);
396		1348
397	/* put pending timers into pendign queue and reschedule them */	1349	/* queue pending timers and reschedule them */
398	/* absolute timers first */	1350	timers_reify (EV_A); /* relative timers called last */
399	timers_reify (atimers, atimercnt, ev_now);	1351	#if EV_PERIODIC_ENABLE
400	/* relative timers second */	1352	periodics_reify (EV_A); /* absolute timers called first */
401	timers_reify (rtimers, rtimercnt, now);	1353	#endif
402		1354
		1355	/* queue idle watchers unless other events are pending */
		1356	if (idlecnt && !any_pending (EV_A))
		1357	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
		1358
		1359	/* queue check watchers, to be executed first */
		1360	if (expect_false (checkcnt))
		1361	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
		1362
403	call_pending ();	1363	call_pending (EV_A);
404	}
405	while (!ev_loop_done);
406	}
407		1364
408	static void	1365	if (expect_false (loop_done))
409	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1366	break;
		1367	}
		1368
		1369	if (loop_done == EVUNLOOP_ONE)
		1370	loop_done = EVUNLOOP_CANCEL;
		1371	}
		1372
		1373	void
		1374	ev_unloop (EV_P_ int how)
		1375	{
		1376	loop_done = how;
		1377	}
		1378
		1379	/*****************************************************************************/
		1380
		1381	void inline_size
		1382	wlist_add (WL *head, WL elem)
410	{	1383	{
411	elem->next = *head;	1384	elem->next = *head;
412	*head = elem;	1385	*head = elem;
413	}	1386	}
414		1387
415	static void	1388	void inline_size
416	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	1389	wlist_del (WL *head, WL elem)
417	{	1390	{
418	while (*head)	1391	while (*head)
419	{	1392	{
420	if (*head == elem)	1393	if (*head == elem)
421	{	1394	{
…		…
425		1398
426	head = &(*head)->next;	1399	head = &(*head)->next;
427	}	1400	}
428	}	1401	}
429		1402
		1403	void inline_speed
		1404	ev_clear_pending (EV_P_ W w)
		1405	{
		1406	if (w->pending)
		1407	{
		1408	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1409	w->pending = 0;
		1410	}
		1411	}
		1412
		1413	void inline_speed
		1414	ev_start (EV_P_ W w, int active)
		1415	{
		1416	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1417	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1418
		1419	w->active = active;
		1420	ev_ref (EV_A);
		1421	}
		1422
		1423	void inline_size
		1424	ev_stop (EV_P_ W w)
		1425	{
		1426	ev_unref (EV_A);
		1427	w->active = 0;
		1428	}
		1429
		1430	/*****************************************************************************/
		1431
		1432	void
		1433	ev_io_start (EV_P_ ev_io *w)
		1434	{
		1435	int fd = w->fd;
		1436
		1437	if (expect_false (ev_is_active (w)))
		1438	return;
		1439
		1440	assert (("ev_io_start called with negative fd", fd >= 0));
		1441
		1442	ev_start (EV_A_ (W)w, 1);
		1443	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
		1444	wlist_add ((WL *)&anfds[fd].head, (WL)w);
		1445
		1446	fd_change (EV_A_ fd);
		1447	}
		1448
		1449	void
		1450	ev_io_stop (EV_P_ ev_io *w)
		1451	{
		1452	ev_clear_pending (EV_A_ (W)w);
		1453	if (expect_false (!ev_is_active (w)))
		1454	return;
		1455
		1456	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		1457
		1458	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
		1459	ev_stop (EV_A_ (W)w);
		1460
		1461	fd_change (EV_A_ w->fd);
		1462	}
		1463
		1464	void
		1465	ev_timer_start (EV_P_ ev_timer *w)
		1466	{
		1467	if (expect_false (ev_is_active (w)))
		1468	return;
		1469
		1470	((WT)w)->at += mn_now;
		1471
		1472	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1473
		1474	ev_start (EV_A_ (W)w, ++timercnt);
		1475	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
		1476	timers [timercnt - 1] = w;
		1477	upheap ((WT *)timers, timercnt - 1);
		1478
		1479	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1480	}
		1481
		1482	void
		1483	ev_timer_stop (EV_P_ ev_timer *w)
		1484	{
		1485	ev_clear_pending (EV_A_ (W)w);
		1486	if (expect_false (!ev_is_active (w)))
		1487	return;
		1488
		1489	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1490
		1491	if (expect_true (((W)w)->active < timercnt--))
		1492	{
		1493	timers [((W)w)->active - 1] = timers [timercnt];
		1494	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1495	}
		1496
		1497	((WT)w)->at -= mn_now;
		1498
		1499	ev_stop (EV_A_ (W)w);
		1500	}
		1501
		1502	void
		1503	ev_timer_again (EV_P_ ev_timer *w)
		1504	{
		1505	if (ev_is_active (w))
		1506	{
		1507	if (w->repeat)
		1508	{
		1509	((WT)w)->at = mn_now + w->repeat;
		1510	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1511	}
		1512	else
		1513	ev_timer_stop (EV_A_ w);
		1514	}
		1515	else if (w->repeat)
		1516	{
		1517	w->at = w->repeat;
		1518	ev_timer_start (EV_A_ w);
		1519	}
		1520	}
		1521
		1522	#if EV_PERIODIC_ENABLE
		1523	void
		1524	ev_periodic_start (EV_P_ ev_periodic *w)
		1525	{
		1526	if (expect_false (ev_is_active (w)))
		1527	return;
		1528
		1529	if (w->reschedule_cb)
		1530	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1531	else if (w->interval)
		1532	{
		1533	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1534	/* this formula differs from the one in periodic_reify because we do not always round up */
		1535	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1536	}
		1537
		1538	ev_start (EV_A_ (W)w, ++periodiccnt);
		1539	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
		1540	periodics [periodiccnt - 1] = w;
		1541	upheap ((WT *)periodics, periodiccnt - 1);
		1542
		1543	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1544	}
		1545
		1546	void
		1547	ev_periodic_stop (EV_P_ ev_periodic *w)
		1548	{
		1549	ev_clear_pending (EV_A_ (W)w);
		1550	if (expect_false (!ev_is_active (w)))
		1551	return;
		1552
		1553	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1554
		1555	if (expect_true (((W)w)->active < periodiccnt--))
		1556	{
		1557	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1558	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
		1559	}
		1560
		1561	ev_stop (EV_A_ (W)w);
		1562	}
		1563
		1564	void
		1565	ev_periodic_again (EV_P_ ev_periodic *w)
		1566	{
		1567	/* TODO: use adjustheap and recalculation */
		1568	ev_periodic_stop (EV_A_ w);
		1569	ev_periodic_start (EV_A_ w);
		1570	}
		1571	#endif
		1572
		1573	#ifndef SA_RESTART
		1574	# define SA_RESTART 0
		1575	#endif
		1576
		1577	void
		1578	ev_signal_start (EV_P_ ev_signal *w)
		1579	{
		1580	#if EV_MULTIPLICITY
		1581	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1582	#endif
		1583	if (expect_false (ev_is_active (w)))
		1584	return;
		1585
		1586	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1587
		1588	ev_start (EV_A_ (W)w, 1);
		1589	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1590	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
		1591
		1592	if (!((WL)w)->next)
		1593	{
		1594	#if _WIN32
		1595	signal (w->signum, sighandler);
		1596	#else
		1597	struct sigaction sa;
		1598	sa.sa_handler = sighandler;
		1599	sigfillset (&sa.sa_mask);
		1600	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
		1601	sigaction (w->signum, &sa, 0);
		1602	#endif
		1603	}
		1604	}
		1605
		1606	void
		1607	ev_signal_stop (EV_P_ ev_signal *w)
		1608	{
		1609	ev_clear_pending (EV_A_ (W)w);
		1610	if (expect_false (!ev_is_active (w)))
		1611	return;
		1612
		1613	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
		1614	ev_stop (EV_A_ (W)w);
		1615
		1616	if (!signals [w->signum - 1].head)
		1617	signal (w->signum, SIG_DFL);
		1618	}
		1619
		1620	void
		1621	ev_child_start (EV_P_ ev_child *w)
		1622	{
		1623	#if EV_MULTIPLICITY
		1624	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1625	#endif
		1626	if (expect_false (ev_is_active (w)))
		1627	return;
		1628
		1629	ev_start (EV_A_ (W)w, 1);
		1630	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1631	}
		1632
		1633	void
		1634	ev_child_stop (EV_P_ ev_child *w)
		1635	{
		1636	ev_clear_pending (EV_A_ (W)w);
		1637	if (expect_false (!ev_is_active (w)))
		1638	return;
		1639
		1640	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1641	ev_stop (EV_A_ (W)w);
		1642	}
		1643
		1644	#if EV_STAT_ENABLE
		1645
		1646	# ifdef _WIN32
		1647	# undef lstat
		1648	# define lstat(a,b) _stati64 (a,b)
		1649	# endif
		1650
		1651	#define DEF_STAT_INTERVAL 5.0074891
		1652	#define MIN_STAT_INTERVAL 0.1074891
		1653
		1654	void
		1655	ev_stat_stat (EV_P_ ev_stat *w)
		1656	{
		1657	if (lstat (w->path, &w->attr) < 0)
		1658	w->attr.st_nlink = 0;
		1659	else if (!w->attr.st_nlink)
		1660	w->attr.st_nlink = 1;
		1661	}
		1662
430	static void	1663	static void
431	ev_start (struct ev_watcher *w, int active)	1664	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
432	{	1665	{
433	w->pending = 0;	1666	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
434	w->active = active;	1667
		1668	/* we copy this here each the time so that */
		1669	/* prev has the old value when the callback gets invoked */
		1670	w->prev = w->attr;
		1671	ev_stat_stat (EV_A_ w);
		1672
		1673	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
		1674	ev_feed_event (EV_A_ w, EV_STAT);
		1675	}
		1676
		1677	void
		1678	ev_stat_start (EV_P_ ev_stat *w)
		1679	{
		1680	if (expect_false (ev_is_active (w)))
		1681	return;
		1682
		1683	/* since we use memcmp, we need to clear any padding data etc. */
		1684	memset (&w->prev, 0, sizeof (ev_statdata));
		1685	memset (&w->attr, 0, sizeof (ev_statdata));
		1686
		1687	ev_stat_stat (EV_A_ w);
		1688
		1689	if (w->interval < MIN_STAT_INTERVAL)
		1690	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		1691
		1692	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		1693	ev_set_priority (&w->timer, ev_priority (w));
		1694	ev_timer_start (EV_A_ &w->timer);
		1695
		1696	ev_start (EV_A_ (W)w, 1);
		1697	}
		1698
		1699	void
		1700	ev_stat_stop (EV_P_ ev_stat *w)
		1701	{
		1702	ev_clear_pending (EV_A_ (W)w);
		1703	if (expect_false (!ev_is_active (w)))
		1704	return;
		1705
		1706	ev_timer_stop (EV_A_ &w->timer);
		1707
		1708	ev_stop (EV_A_ (W)w);
		1709	}
		1710	#endif
		1711
		1712	void
		1713	ev_idle_start (EV_P_ ev_idle *w)
		1714	{
		1715	if (expect_false (ev_is_active (w)))
		1716	return;
		1717
		1718	ev_start (EV_A_ (W)w, ++idlecnt);
		1719	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1720	idles [idlecnt - 1] = w;
		1721	}
		1722
		1723	void
		1724	ev_idle_stop (EV_P_ ev_idle *w)
		1725	{
		1726	ev_clear_pending (EV_A_ (W)w);
		1727	if (expect_false (!ev_is_active (w)))
		1728	return;
		1729
		1730	{
		1731	int active = ((W)w)->active;
		1732	idles [active - 1] = idles [--idlecnt];
		1733	((W)idles [active - 1])->active = active;
		1734	}
		1735
		1736	ev_stop (EV_A_ (W)w);
		1737	}
		1738
		1739	void
		1740	ev_prepare_start (EV_P_ ev_prepare *w)
		1741	{
		1742	if (expect_false (ev_is_active (w)))
		1743	return;
		1744
		1745	ev_start (EV_A_ (W)w, ++preparecnt);
		1746	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1747	prepares [preparecnt - 1] = w;
		1748	}
		1749
		1750	void
		1751	ev_prepare_stop (EV_P_ ev_prepare *w)
		1752	{
		1753	ev_clear_pending (EV_A_ (W)w);
		1754	if (expect_false (!ev_is_active (w)))
		1755	return;
		1756
		1757	{
		1758	int active = ((W)w)->active;
		1759	prepares [active - 1] = prepares [--preparecnt];
		1760	((W)prepares [active - 1])->active = active;
		1761	}
		1762
		1763	ev_stop (EV_A_ (W)w);
		1764	}
		1765
		1766	void
		1767	ev_check_start (EV_P_ ev_check *w)
		1768	{
		1769	if (expect_false (ev_is_active (w)))
		1770	return;
		1771
		1772	ev_start (EV_A_ (W)w, ++checkcnt);
		1773	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1774	checks [checkcnt - 1] = w;
		1775	}
		1776
		1777	void
		1778	ev_check_stop (EV_P_ ev_check *w)
		1779	{
		1780	ev_clear_pending (EV_A_ (W)w);
		1781	if (expect_false (!ev_is_active (w)))
		1782	return;
		1783
		1784	{
		1785	int active = ((W)w)->active;
		1786	checks [active - 1] = checks [--checkcnt];
		1787	((W)checks [active - 1])->active = active;
		1788	}
		1789
		1790	ev_stop (EV_A_ (W)w);
		1791	}
		1792
		1793	#if EV_EMBED_ENABLE
		1794	void noinline
		1795	ev_embed_sweep (EV_P_ ev_embed *w)
		1796	{
		1797	ev_loop (w->loop, EVLOOP_NONBLOCK);
435	}	1798	}
436		1799
437	static void	1800	static void
438	ev_stop (struct ev_watcher *w)	1801	embed_cb (EV_P_ ev_io *io, int revents)
439	{	1802	{
440	if (w->pending)	1803	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
441	pendings [w->pending - 1].w = 0;
442		1804
443	w->active = 0;
444	/* nop */
445	}
446
447	void
448	evio_start (struct ev_io *w)
449	{
450	if (ev_is_active (w))	1805	if (ev_cb (w))
451	return;	1806	ev_feed_event (EV_A_ (W)w, EV_EMBED);
452
453	int fd = w->fd;
454
455	ev_start ((struct ev_watcher *)w, 1);
456	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
457	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
458
459	++fdchangecnt;
460	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
461	fdchanges [fdchangecnt - 1] = fd;
462	}
463
464	void
465	evio_stop (struct ev_io *w)
466	{
467	if (!ev_is_active (w))
468	return;
469
470	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);
471	ev_stop ((struct ev_watcher *)w);
472
473	++fdchangecnt;
474	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
475	fdchanges [fdchangecnt - 1] = w->fd;
476	}
477
478	void
479	evtimer_start (struct ev_timer *w)
480	{
481	if (ev_is_active (w))
482	return;
483
484	if (w->is_abs)
485	{
486	/* this formula differs from the one in timer_reify becuse we do not round up */
487	if (w->repeat)
488	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
489
490	ev_start ((struct ev_watcher *)w, ++atimercnt);
491	array_needsize (atimers, atimermax, atimercnt, );
492	atimers [atimercnt - 1] = w;
493	upheap (atimers, atimercnt - 1);
494	}
495	else	1807	else
		1808	ev_embed_sweep (loop, w);
		1809	}
		1810
		1811	void
		1812	ev_embed_start (EV_P_ ev_embed *w)
		1813	{
		1814	if (expect_false (ev_is_active (w)))
		1815	return;
		1816
496	{	1817	{
497	w->at += now;	1818	struct ev_loop *loop = w->loop;
498		1819	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
499	ev_start ((struct ev_watcher *)w, ++rtimercnt);	1820	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
500	array_needsize (rtimers, rtimermax, rtimercnt, );
501	rtimers [rtimercnt - 1] = w;
502	upheap (rtimers, rtimercnt - 1);
503	}	1821	}
504		1822
505	}	1823	ev_set_priority (&w->io, ev_priority (w));
		1824	ev_io_start (EV_A_ &w->io);
506		1825
		1826	ev_start (EV_A_ (W)w, 1);
		1827	}
		1828
507	void	1829	void
508	evtimer_stop (struct ev_timer *w)	1830	ev_embed_stop (EV_P_ ev_embed *w)
509	{	1831	{
		1832	ev_clear_pending (EV_A_ (W)w);
510	if (!ev_is_active (w))	1833	if (expect_false (!ev_is_active (w)))
511	return;	1834	return;
512		1835
513	if (w->is_abs)	1836	ev_io_stop (EV_A_ &w->io);
514	{
515	if (w->active < atimercnt--)
516	{
517	atimers [w->active - 1] = atimers [atimercnt];
518	downheap (atimers, atimercnt, w->active - 1);
519	}
520	}
521	else
522	{
523	if (w->active < rtimercnt--)
524	{
525	rtimers [w->active - 1] = rtimers [rtimercnt];
526	downheap (rtimers, rtimercnt, w->active - 1);
527	}
528	}
529		1837
530	ev_stop ((struct ev_watcher *)w);	1838	ev_stop (EV_A_ (W)w);
531	}	1839	}
		1840	#endif
532		1841
		1842	#if EV_FORK_ENABLE
533	void	1843	void
534	evsignal_start (struct ev_signal *w)	1844	ev_fork_start (EV_P_ ev_fork *w)
535	{	1845	{
536	if (ev_is_active (w))	1846	if (expect_false (ev_is_active (w)))
537	return;	1847	return;
538		1848
539	ev_start ((struct ev_watcher *)w, 1);	1849	ev_start (EV_A_ (W)w, ++forkcnt);
540	array_needsize (signals, signalmax, w->signum, signals_init);	1850	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
541	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	1851	forks [forkcnt - 1] = w;
542	}	1852	}
543		1853
544	void	1854	void
545	evsignal_stop (struct ev_signal *w)	1855	ev_fork_stop (EV_P_ ev_fork *w)
546	{	1856	{
		1857	ev_clear_pending (EV_A_ (W)w);
547	if (!ev_is_active (w))	1858	if (expect_false (!ev_is_active (w)))
548	return;	1859	return;
549		1860
550	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);	1861	{
551	ev_stop ((struct ev_watcher *)w);	1862	int active = ((W)w)->active;
		1863	forks [active - 1] = forks [--forkcnt];
		1864	((W)forks [active - 1])->active = active;
		1865	}
		1866
		1867	ev_stop (EV_A_ (W)w);
552	}	1868	}
		1869	#endif
553		1870
554	/*****************************************************************************/	1871	/*****************************************************************************/
555	#if 1	1872
		1873	struct ev_once
		1874	{
		1875	ev_io io;
		1876	ev_timer to;
		1877	void (*cb)(int revents, void *arg);
		1878	void *arg;
		1879	};
556		1880
557	static void	1881	static void
558	sin_cb (struct ev_io *w, int revents)	1882	once_cb (EV_P_ struct ev_once *once, int revents)
559	{	1883	{
560	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1884	void (*cb)(int revents, void *arg) = once->cb;
		1885	void *arg = once->arg;
		1886
		1887	ev_io_stop (EV_A_ &once->io);
		1888	ev_timer_stop (EV_A_ &once->to);
		1889	ev_free (once);
		1890
		1891	cb (revents, arg);
561	}	1892	}
562		1893
563	static void	1894	static void
		1895	once_cb_io (EV_P_ ev_io *w, int revents)
		1896	{
		1897	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1898	}
		1899
		1900	static void
564	ocb (struct ev_timer *w, int revents)	1901	once_cb_to (EV_P_ ev_timer *w, int revents)
565	{	1902	{
566	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1903	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
567	evtimer_stop (w);
568	evtimer_start (w);
569	}	1904	}
570		1905
571	int main (void)	1906	void
		1907	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
572	{	1908	{
573	struct ev_io sin;	1909	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
574		1910
575	ev_init (0);	1911	if (expect_false (!once))
576
577	evw_init (&sin, sin_cb, 55);
578	evio_set (&sin, 0, EV_READ);
579	evio_start (&sin);
580
581	struct ev_timer t[10000];
582
583	#if 1
584	int i;
585	for (i = 0; i < 10000; ++i)
586	{
587	struct ev_timer *w = t + i;
588	evw_init (w, ocb, i);
589	evtimer_set_abs (w, drand48 (), 0.99775533);
590	evtimer_start (w);
591	if (drand48 () < 0.5)
592	evtimer_stop (w);
593	}	1912	{
594	#endif	1913	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
595
596	struct ev_timer t1;
597	evw_init (&t1, ocb, 0);
598	evtimer_set_abs (&t1, 5, 10);
599	evtimer_start (&t1);
600
601	ev_loop (0);
602
603	return 0;	1914	return;
604	}	1915	}
605		1916
606	#endif	1917	once->cb = cb;
		1918	once->arg = arg;
607		1919
		1920	ev_init (&once->io, once_cb_io);
		1921	if (fd >= 0)
		1922	{
		1923	ev_io_set (&once->io, fd, events);
		1924	ev_io_start (EV_A_ &once->io);
		1925	}
608		1926
		1927	ev_init (&once->to, once_cb_to);
		1928	if (timeout >= 0.)
		1929	{
		1930	ev_timer_set (&once->to, timeout, 0.);
		1931	ev_timer_start (EV_A_ &once->to);
		1932	}
		1933	}
609		1934
		1935	#ifdef __cplusplus
		1936	}
		1937	#endif
610		1938

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