ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.72 by root, Tue Nov 6 16:09:37 2007 UTC vs.
Revision 1.249 by root, Wed May 21 23:30:52 2008 UTC

1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* modification, are permitted provided that the following conditions are	8	* tion, are permitted provided that the following conditions are met:
9	* met:	9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
10	*	27	*
11	* * Redistributions of source code must retain the above copyright	28	* Alternatively, the contents of this file may be used under the terms of
12	* notice, this list of conditions and the following disclaimer.	29	* the GNU General Public License ("GPL") version 2 or any later version,
13	*	30	* in which case the provisions of the GPL are applicable instead of
14	* * Redistributions in binary form must reproduce the above	31	* the above. If you wish to allow the use of your version of this file
15	* copyright notice, this list of conditions and the following	32	* only under the terms of the GPL and not to allow others to use your
16	* disclaimer in the documentation and/or other materials provided	33	* version of this file under the BSD license, indicate your decision
17	* with the distribution.	34	* by deleting the provisions above and replace them with the notice
18	*	35	* and other provisions required by the GPL. If you do not delete the
19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	36	* provisions above, a recipient may use your version of this file under
20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	37	* either the BSD or the GPL.
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	*/	38	*/
		39
		40	#ifdef __cplusplus
		41	extern "C" {
		42	#endif
		43
		44	/* this big block deduces configuration from config.h */
31	#ifndef EV_STANDALONE	45	#ifndef EV_STANDALONE
		46	# ifdef EV_CONFIG_H
		47	# include EV_CONFIG_H
		48	# else
32	# include "config.h"	49	# include "config.h"
		50	# endif
33		51
34	# if HAVE_CLOCK_GETTIME	52	# if HAVE_CLOCK_GETTIME
		53	# ifndef EV_USE_MONOTONIC
35	# define EV_USE_MONOTONIC 1	54	# define EV_USE_MONOTONIC 1
		55	# endif
		56	# ifndef EV_USE_REALTIME
36	# define EV_USE_REALTIME 1	57	# define EV_USE_REALTIME 1
		58	# endif
		59	# else
		60	# ifndef EV_USE_MONOTONIC
		61	# define EV_USE_MONOTONIC 0
		62	# endif
		63	# ifndef EV_USE_REALTIME
		64	# define EV_USE_REALTIME 0
		65	# endif
37	# endif	66	# endif
38		67
39	# if HAVE_SELECT && HAVE_SYS_SELECT_H	68	# ifndef EV_USE_NANOSLEEP
		69	# if HAVE_NANOSLEEP
40	# define EV_USE_SELECT 1	70	# define EV_USE_NANOSLEEP 1
		71	# else
		72	# define EV_USE_NANOSLEEP 0
		73	# endif
41	# endif	74	# endif
42		75
43	# if HAVE_POLL && HAVE_POLL_H	76	# ifndef EV_USE_SELECT
		77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
44	# define EV_USE_POLL 1	78	# define EV_USE_SELECT 1
		79	# else
		80	# define EV_USE_SELECT 0
		81	# endif
45	# endif	82	# endif
46		83
47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H	84	# ifndef EV_USE_POLL
		85	# if HAVE_POLL && HAVE_POLL_H
48	# define EV_USE_EPOLL 1	86	# define EV_USE_POLL 1
		87	# else
		88	# define EV_USE_POLL 0
		89	# endif
49	# endif	90	# endif
50		91
51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H	92	# ifndef EV_USE_EPOLL
		93	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
52	# define EV_USE_KQUEUE 1	94	# define EV_USE_EPOLL 1
		95	# else
		96	# define EV_USE_EPOLL 0
		97	# endif
53	# endif	98	# endif
		99
		100	# ifndef EV_USE_KQUEUE
		101	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		102	# define EV_USE_KQUEUE 1
		103	# else
		104	# define EV_USE_KQUEUE 0
		105	# endif
		106	# endif
		107
		108	# ifndef EV_USE_PORT
		109	# if HAVE_PORT_H && HAVE_PORT_CREATE
		110	# define EV_USE_PORT 1
		111	# else
		112	# define EV_USE_PORT 0
		113	# endif
		114	# endif
54		115
		116	# ifndef EV_USE_INOTIFY
		117	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		118	# define EV_USE_INOTIFY 1
		119	# else
		120	# define EV_USE_INOTIFY 0
		121	# endif
		122	# endif
		123
		124	# ifndef EV_USE_EVENTFD
		125	# if HAVE_EVENTFD
		126	# define EV_USE_EVENTFD 1
		127	# else
		128	# define EV_USE_EVENTFD 0
		129	# endif
		130	# endif
		131
55	#endif	132	#endif
56		133
57	#include <math.h>	134	#include <math.h>
58	#include <stdlib.h>	135	#include <stdlib.h>
59	#include <fcntl.h>	136	#include <fcntl.h>
…		…
66	#include <sys/types.h>	143	#include <sys/types.h>
67	#include <time.h>	144	#include <time.h>
68		145
69	#include <signal.h>	146	#include <signal.h>
70		147
		148	#ifdef EV_H
		149	# include EV_H
		150	#else
		151	# include "ev.h"
		152	#endif
		153
71	#ifndef WIN32	154	#ifndef _WIN32
72	# include <unistd.h>
73	# include <sys/time.h>	155	# include <sys/time.h>
74	# include <sys/wait.h>	156	# include <sys/wait.h>
		157	# include <unistd.h>
		158	#else
		159	# define WIN32_LEAN_AND_MEAN
		160	# include <windows.h>
		161	# ifndef EV_SELECT_IS_WINSOCKET
		162	# define EV_SELECT_IS_WINSOCKET 1
75	#endif	163	# endif
76	/**/	164	#endif
		165
		166	/* this block tries to deduce configuration from header-defined symbols and defaults */
77		167
78	#ifndef EV_USE_MONOTONIC	168	#ifndef EV_USE_MONOTONIC
79	# define EV_USE_MONOTONIC 1	169	# define EV_USE_MONOTONIC 0
		170	#endif
		171
		172	#ifndef EV_USE_REALTIME
		173	# define EV_USE_REALTIME 0
		174	#endif
		175
		176	#ifndef EV_USE_NANOSLEEP
		177	# define EV_USE_NANOSLEEP 0
80	#endif	178	#endif
81		179
82	#ifndef EV_USE_SELECT	180	#ifndef EV_USE_SELECT
83	# define EV_USE_SELECT 1	181	# define EV_USE_SELECT 1
84	#endif	182	#endif
85		183
86	#ifndef EV_USE_POLL	184	#ifndef EV_USE_POLL
87	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */	185	# ifdef _WIN32
		186	# define EV_USE_POLL 0
		187	# else
		188	# define EV_USE_POLL 1
		189	# endif
88	#endif	190	#endif
89		191
90	#ifndef EV_USE_EPOLL	192	#ifndef EV_USE_EPOLL
		193	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		194	# define EV_USE_EPOLL 1
		195	# else
91	# define EV_USE_EPOLL 0	196	# define EV_USE_EPOLL 0
		197	# endif
92	#endif	198	#endif
93		199
94	#ifndef EV_USE_KQUEUE	200	#ifndef EV_USE_KQUEUE
95	# define EV_USE_KQUEUE 0	201	# define EV_USE_KQUEUE 0
96	#endif	202	#endif
97		203
		204	#ifndef EV_USE_PORT
		205	# define EV_USE_PORT 0
		206	#endif
		207
98	#ifndef EV_USE_WIN32	208	#ifndef EV_USE_INOTIFY
99	# ifdef WIN32	209	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
100	# define EV_USE_WIN32 0 /* it does not exist, use select */
101	# undef EV_USE_SELECT
102	# define EV_USE_SELECT 1	210	# define EV_USE_INOTIFY 1
103	# else	211	# else
104	# define EV_USE_WIN32 0	212	# define EV_USE_INOTIFY 0
105	# endif	213	# endif
106	#endif	214	#endif
107		215
108	#ifndef EV_USE_REALTIME	216	#ifndef EV_PID_HASHSIZE
109	# define EV_USE_REALTIME 1	217	# if EV_MINIMAL
		218	# define EV_PID_HASHSIZE 1
		219	# else
		220	# define EV_PID_HASHSIZE 16
110	#endif	221	# endif
		222	#endif
111		223
112	/**/	224	#ifndef EV_INOTIFY_HASHSIZE
		225	# if EV_MINIMAL
		226	# define EV_INOTIFY_HASHSIZE 1
		227	# else
		228	# define EV_INOTIFY_HASHSIZE 16
		229	# endif
		230	#endif
		231
		232	#ifndef EV_USE_EVENTFD
		233	# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		234	# define EV_USE_EVENTFD 1
		235	# else
		236	# define EV_USE_EVENTFD 0
		237	# endif
		238	#endif
		239
		240	#if 0 /* debugging */
		241	# define EV_VERIFY 1
		242	# define EV_USE_4HEAP 1
		243	# define EV_HEAP_CACHE_AT 1
		244	#endif
		245
		246	#ifndef EV_USE_4HEAP
		247	# define EV_USE_4HEAP !EV_MINIMAL
		248	#endif
		249
		250	#ifndef EV_HEAP_CACHE_AT
		251	# define EV_HEAP_CACHE_AT !EV_MINIMAL
		252	#endif
		253
		254	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
113		255
114	#ifndef CLOCK_MONOTONIC	256	#ifndef CLOCK_MONOTONIC
115	# undef EV_USE_MONOTONIC	257	# undef EV_USE_MONOTONIC
116	# define EV_USE_MONOTONIC 0	258	# define EV_USE_MONOTONIC 0
117	#endif	259	#endif
…		…
119	#ifndef CLOCK_REALTIME	261	#ifndef CLOCK_REALTIME
120	# undef EV_USE_REALTIME	262	# undef EV_USE_REALTIME
121	# define EV_USE_REALTIME 0	263	# define EV_USE_REALTIME 0
122	#endif	264	#endif
123		265
		266	#if !EV_STAT_ENABLE
		267	# undef EV_USE_INOTIFY
		268	# define EV_USE_INOTIFY 0
		269	#endif
		270
		271	#if !EV_USE_NANOSLEEP
		272	# ifndef _WIN32
		273	# include <sys/select.h>
		274	# endif
		275	#endif
		276
		277	#if EV_USE_INOTIFY
		278	# include <sys/inotify.h>
		279	#endif
		280
		281	#if EV_SELECT_IS_WINSOCKET
		282	# include <winsock.h>
		283	#endif
		284
		285	#if EV_USE_EVENTFD
		286	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		287	# include <stdint.h>
		288	# ifdef __cplusplus
		289	extern "C" {
		290	# endif
		291	int eventfd (unsigned int initval, int flags);
		292	# ifdef __cplusplus
		293	}
		294	# endif
		295	#endif
		296
124	/**/	297	/**/
125		298
		299	/* EV_VERIFY: enable internal consistency checks
		300	* undefined or zero: no verification done or available
		301	* 1 or higher: ev_loop_verify function available
		302	* 2 or higher: ev_loop_verify is called frequently
		303	*/
		304	#if EV_VERIFY >= 1
		305	# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
		306	#else
		307	# define EV_FREQUENT_CHECK do { } while (0)
		308	#endif
		309
		310	/*
		311	* This is used to avoid floating point rounding problems.
		312	* It is added to ev_rt_now when scheduling periodics
		313	* to ensure progress, time-wise, even when rounding
		314	* errors are against us.
		315	* This value is good at least till the year 4000.
		316	* Better solutions welcome.
		317	*/
		318	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
		319
126	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	320	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
127	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */	321	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
128	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
129	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */	322	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
130		323
131	#include "ev.h"
132
133	#if __GNUC__ >= 3	324	#if __GNUC__ >= 4
134	# define expect(expr,value) __builtin_expect ((expr),(value))	325	# define expect(expr,value) __builtin_expect ((expr),(value))
135	# define inline inline	326	# define noinline __attribute__ ((noinline))
136	#else	327	#else
137	# define expect(expr,value) (expr)	328	# define expect(expr,value) (expr)
138	# define inline static	329	# define noinline
		330	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
		331	# define inline
		332	# endif
139	#endif	333	#endif
140		334
141	#define expect_false(expr) expect ((expr) != 0, 0)	335	#define expect_false(expr) expect ((expr) != 0, 0)
142	#define expect_true(expr) expect ((expr) != 0, 1)	336	#define expect_true(expr) expect ((expr) != 0, 1)
		337	#define inline_size static inline
		338
		339	#if EV_MINIMAL
		340	# define inline_speed static noinline
		341	#else
		342	# define inline_speed static inline
		343	#endif
143		344
144	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	345	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
145	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	346	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
146		347
		348	#define EMPTY /* required for microsofts broken pseudo-c compiler */
		349	#define EMPTY2(a,b) /* used to suppress some warnings */
		350
147	typedef struct ev_watcher *W;	351	typedef ev_watcher *W;
148	typedef struct ev_watcher_list *WL;	352	typedef ev_watcher_list *WL;
149	typedef struct ev_watcher_time *WT;	353	typedef ev_watcher_time *WT;
150		354
		355	#define ev_active(w) ((W)(w))->active
		356	#define ev_at(w) ((WT)(w))->at
		357
		358	#if EV_USE_MONOTONIC
		359	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		360	/* giving it a reasonably high chance of working on typical architetcures */
151	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	361	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		362	#endif
152		363
153	#if WIN32	364	#ifdef _WIN32
154	/* note: the comment below could not be substantiated, but what would I care */	365	# include "ev_win32.c"
155	/* MSDN says this is required to handle SIGFPE */
156	volatile double SIGFPE_REQ = 0.0f;
157
158	static int
159	ev_socketpair_tcp (int filedes [2])
160	{
161	struct sockaddr_in addr = { 0 };
162	int addr_size = sizeof (addr);
163	SOCKET listener;
164	SOCKET sock [2] = { -1, -1 };
165
166	if ((listener = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)
167	return -1;
168
169	addr.sin_family = AF_INET;
170	addr.sin_addr.s_addr = htonl (INADDR_LOOPBACK);
171	addr.sin_port = 0;
172
173	if (bind (listener, (struct sockaddr *)&addr, addr_size))
174	goto fail;
175
176	if (getsockname(listener, (struct sockaddr *)&addr, &addr_size))
177	goto fail;
178
179	if (listen (listener, 1))
180	goto fail;
181
182	if ((sock [0] = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)
183	goto fail;
184
185	if (connect (sock[0], (struct sockaddr *)&addr, addr_size))
186	goto fail;
187
188	if ((sock[1] = accept (listener, 0, 0)) < 0)
189	goto fail;
190
191	closesocket (listener);
192
193	filedes [0] = sock [0];
194	filedes [1] = sock [1];
195
196	return 0;
197
198	fail:
199	closesocket (listener);
200
201	if (sock [0] != INVALID_SOCKET) closesocket (sock [0]);
202	if (sock [1] != INVALID_SOCKET) closesocket (sock [1]);
203
204	return -1;
205	}
206
207	# define ev_pipe(filedes) ev_socketpair_tcp (filedes)
208	#else
209	# define ev_pipe(filedes) pipe (filedes)
210	#endif	366	#endif
211		367
212	/*****************************************************************************/	368	/*****************************************************************************/
213		369
214	static void (*syserr_cb)(const char *msg);	370	static void (*syserr_cb)(const char *msg);
215		371
		372	void
216	void ev_set_syserr_cb (void (*cb)(const char *msg))	373	ev_set_syserr_cb (void (*cb)(const char *msg))
217	{	374	{
218	syserr_cb = cb;	375	syserr_cb = cb;
219	}	376	}
220		377
221	static void	378	static void noinline
222	syserr (const char *msg)	379	syserr (const char *msg)
223	{	380	{
224	if (!msg)	381	if (!msg)
225	msg = "(libev) system error";	382	msg = "(libev) system error";
226		383
…		…
231	perror (msg);	388	perror (msg);
232	abort ();	389	abort ();
233	}	390	}
234	}	391	}
235		392
		393	static void *
		394	ev_realloc_emul (void *ptr, long size)
		395	{
		396	/* some systems, notably openbsd and darwin, fail to properly
		397	* implement realloc (x, 0) (as required by both ansi c-98 and
		398	* the single unix specification, so work around them here.
		399	*/
		400
		401	if (size)
		402	return realloc (ptr, size);
		403
		404	free (ptr);
		405	return 0;
		406	}
		407
236	static void *(*alloc)(void *ptr, long size);	408	static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
237		409
		410	void
238	void ev_set_allocator (void *(*cb)(void *ptr, long size))	411	ev_set_allocator (void *(*cb)(void *ptr, long size))
239	{	412	{
240	alloc = cb;	413	alloc = cb;
241	}	414	}
242		415
243	static void *	416	inline_speed void *
244	ev_realloc (void *ptr, long size)	417	ev_realloc (void *ptr, long size)
245	{	418	{
246	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	419	ptr = alloc (ptr, size);
247		420
248	if (!ptr && size)	421	if (!ptr && size)
249	{	422	{
250	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	423	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
251	abort ();	424	abort ();
…		…
262	typedef struct	435	typedef struct
263	{	436	{
264	WL head;	437	WL head;
265	unsigned char events;	438	unsigned char events;
266	unsigned char reify;	439	unsigned char reify;
		440	#if EV_SELECT_IS_WINSOCKET
		441	SOCKET handle;
		442	#endif
267	} ANFD;	443	} ANFD;
268		444
269	typedef struct	445	typedef struct
270	{	446	{
271	W w;	447	W w;
272	int events;	448	int events;
273	} ANPENDING;	449	} ANPENDING;
274		450
		451	#if EV_USE_INOTIFY
		452	/* hash table entry per inotify-id */
		453	typedef struct
		454	{
		455	WL head;
		456	} ANFS;
		457	#endif
		458
		459	/* Heap Entry */
		460	#if EV_HEAP_CACHE_AT
		461	typedef struct {
		462	ev_tstamp at;
		463	WT w;
		464	} ANHE;
		465
		466	#define ANHE_w(he) (he).w /* access watcher, read-write */
		467	#define ANHE_at(he) (he).at /* access cached at, read-only */
		468	#define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
		469	#else
		470	typedef WT ANHE;
		471
		472	#define ANHE_w(he) (he)
		473	#define ANHE_at(he) (he)->at
		474	#define ANHE_at_cache(he)
		475	#endif
		476
275	#if EV_MULTIPLICITY	477	#if EV_MULTIPLICITY
276		478
277	struct ev_loop	479	struct ev_loop
278	{	480	{
		481	ev_tstamp ev_rt_now;
		482	#define ev_rt_now ((loop)->ev_rt_now)
279	# define VAR(name,decl) decl;	483	#define VAR(name,decl) decl;
280	# include "ev_vars.h"	484	#include "ev_vars.h"
281	};
282	# undef VAR	485	#undef VAR
		486	};
283	# include "ev_wrap.h"	487	#include "ev_wrap.h"
		488
		489	static struct ev_loop default_loop_struct;
		490	struct ev_loop *ev_default_loop_ptr;
284		491
285	#else	492	#else
286		493
		494	ev_tstamp ev_rt_now;
287	# define VAR(name,decl) static decl;	495	#define VAR(name,decl) static decl;
288	# include "ev_vars.h"	496	#include "ev_vars.h"
289	# undef VAR	497	#undef VAR
		498
		499	static int ev_default_loop_ptr;
290		500
291	#endif	501	#endif
292		502
293	/*****************************************************************************/	503	/*****************************************************************************/
294		504
295	inline ev_tstamp	505	ev_tstamp
296	ev_time (void)	506	ev_time (void)
297	{	507	{
298	#if EV_USE_REALTIME	508	#if EV_USE_REALTIME
299	struct timespec ts;	509	struct timespec ts;
300	clock_gettime (CLOCK_REALTIME, &ts);	510	clock_gettime (CLOCK_REALTIME, &ts);
…		…
304	gettimeofday (&tv, 0);	514	gettimeofday (&tv, 0);
305	return tv.tv_sec + tv.tv_usec * 1e-6;	515	return tv.tv_sec + tv.tv_usec * 1e-6;
306	#endif	516	#endif
307	}	517	}
308		518
309	inline ev_tstamp	519	ev_tstamp inline_size
310	get_clock (void)	520	get_clock (void)
311	{	521	{
312	#if EV_USE_MONOTONIC	522	#if EV_USE_MONOTONIC
313	if (expect_true (have_monotonic))	523	if (expect_true (have_monotonic))
314	{	524	{
…		…
319	#endif	529	#endif
320		530
321	return ev_time ();	531	return ev_time ();
322	}	532	}
323		533
		534	#if EV_MULTIPLICITY
324	ev_tstamp	535	ev_tstamp
325	ev_now (EV_P)	536	ev_now (EV_P)
326	{	537	{
327	return rt_now;	538	return ev_rt_now;
328	}	539	}
		540	#endif
329		541
330	#define array_roundsize(base,n) ((n) | 4 & ~3)	542	void
		543	ev_sleep (ev_tstamp delay)
		544	{
		545	if (delay > 0.)
		546	{
		547	#if EV_USE_NANOSLEEP
		548	struct timespec ts;
331		549
		550	ts.tv_sec = (time_t)delay;
		551	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		552
		553	nanosleep (&ts, 0);
		554	#elif defined(_WIN32)
		555	Sleep ((unsigned long)(delay * 1e3));
		556	#else
		557	struct timeval tv;
		558
		559	tv.tv_sec = (time_t)delay;
		560	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		561
		562	select (0, 0, 0, 0, &tv);
		563	#endif
		564	}
		565	}
		566
		567	/*****************************************************************************/
		568
		569	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
		570
		571	int inline_size
		572	array_nextsize (int elem, int cur, int cnt)
		573	{
		574	int ncur = cur + 1;
		575
		576	do
		577	ncur <<= 1;
		578	while (cnt > ncur);
		579
		580	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
		581	if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
		582	{
		583	ncur *= elem;
		584	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
		585	ncur = ncur - sizeof (void *) * 4;
		586	ncur /= elem;
		587	}
		588
		589	return ncur;
		590	}
		591
		592	static noinline void *
		593	array_realloc (int elem, void *base, int *cur, int cnt)
		594	{
		595	*cur = array_nextsize (elem, *cur, cnt);
		596	return ev_realloc (base, elem * *cur);
		597	}
		598
332	#define array_needsize(base,cur,cnt,init) \	599	#define array_needsize(type,base,cur,cnt,init) \
333	if (expect_false ((cnt) > cur)) \	600	if (expect_false ((cnt) > (cur))) \
334	{ \	601	{ \
335	int newcnt = cur; \	602	int ocur_ = (cur); \
336	do \	603	(base) = (type *)array_realloc \
337	{ \	604	(sizeof (type), (base), &(cur), (cnt)); \
338	newcnt = array_roundsize (base, newcnt << 1); \	605	init ((base) + (ocur_), (cur) - ocur_); \
339	} \
340	while ((cnt) > newcnt); \
341	\
342	base = ev_realloc (base, sizeof (*base) * (newcnt)); \
343	init (base + cur, newcnt - cur); \
344	cur = newcnt; \
345	}	606	}
346		607
		608	#if 0
347	#define array_slim(stem) \	609	#define array_slim(type,stem) \
348	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \	610	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
349	{ \	611	{ \
350	stem ## max = array_roundsize (stem ## cnt >> 1); \	612	stem ## max = array_roundsize (stem ## cnt >> 1); \
351	base = ev_realloc (base, sizeof (*base) * (stem ## max)); \	613	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
352	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	614	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
353	}	615	}
354		616	#endif
355	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
356	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
357	#define array_free_microshit(stem) \
358	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
359		617
360	#define array_free(stem, idx) \	618	#define array_free(stem, idx) \
361	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	619	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
362		620
363	/*****************************************************************************/	621	/*****************************************************************************/
364		622
365	static void	623	void noinline
		624	ev_feed_event (EV_P_ void *w, int revents)
		625	{
		626	W w_ = (W)w;
		627	int pri = ABSPRI (w_);
		628
		629	if (expect_false (w_->pending))
		630	pendings [pri][w_->pending - 1].events |= revents;
		631	else
		632	{
		633	w_->pending = ++pendingcnt [pri];
		634	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		635	pendings [pri][w_->pending - 1].w = w_;
		636	pendings [pri][w_->pending - 1].events = revents;
		637	}
		638	}
		639
		640	void inline_speed
		641	queue_events (EV_P_ W *events, int eventcnt, int type)
		642	{
		643	int i;
		644
		645	for (i = 0; i < eventcnt; ++i)
		646	ev_feed_event (EV_A_ events [i], type);
		647	}
		648
		649	/*****************************************************************************/
		650
		651	void inline_size
366	anfds_init (ANFD *base, int count)	652	anfds_init (ANFD *base, int count)
367	{	653	{
368	while (count--)	654	while (count--)
369	{	655	{
370	base->head = 0;	656	base->head = 0;
…		…
373		659
374	++base;	660	++base;
375	}	661	}
376	}	662	}
377		663
378	static void	664	void inline_speed
379	event (EV_P_ W w, int events)
380	{
381	if (w->pending)
382	{
383	pendings [ABSPRI (w)][w->pending - 1].events |= events;
384	return;
385	}
386
387	w->pending = ++pendingcnt [ABSPRI (w)];
388	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
389	pendings [ABSPRI (w)][w->pending - 1].w = w;
390	pendings [ABSPRI (w)][w->pending - 1].events = events;
391	}
392
393	static void
394	queue_events (EV_P_ W *events, int eventcnt, int type)
395	{
396	int i;
397
398	for (i = 0; i < eventcnt; ++i)
399	event (EV_A_ events [i], type);
400	}
401
402	static void
403	fd_event (EV_P_ int fd, int events)	665	fd_event (EV_P_ int fd, int revents)
404	{	666	{
405	ANFD *anfd = anfds + fd;	667	ANFD *anfd = anfds + fd;
406	struct ev_io *w;	668	ev_io *w;
407		669
408	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	670	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
409	{	671	{
410	int ev = w->events & events;	672	int ev = w->events & revents;
411		673
412	if (ev)	674	if (ev)
413	event (EV_A_ (W)w, ev);	675	ev_feed_event (EV_A_ (W)w, ev);
414	}	676	}
415	}	677	}
416		678
417	/*****************************************************************************/	679	void
		680	ev_feed_fd_event (EV_P_ int fd, int revents)
		681	{
		682	if (fd >= 0 && fd < anfdmax)
		683	fd_event (EV_A_ fd, revents);
		684	}
418		685
419	static void	686	void inline_size
420	fd_reify (EV_P)	687	fd_reify (EV_P)
421	{	688	{
422	int i;	689	int i;
423		690
424	for (i = 0; i < fdchangecnt; ++i)	691	for (i = 0; i < fdchangecnt; ++i)
425	{	692	{
426	int fd = fdchanges [i];	693	int fd = fdchanges [i];
427	ANFD *anfd = anfds + fd;	694	ANFD *anfd = anfds + fd;
428	struct ev_io *w;	695	ev_io *w;
429		696
430	int events = 0;	697	unsigned char events = 0;
431		698
432	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	699	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
433	events |= w->events;	700	events |= (unsigned char)w->events;
434		701
		702	#if EV_SELECT_IS_WINSOCKET
		703	if (events)
		704	{
		705	unsigned long argp;
		706	#ifdef EV_FD_TO_WIN32_HANDLE
		707	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		708	#else
		709	anfd->handle = _get_osfhandle (fd);
		710	#endif
		711	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		712	}
		713	#endif
		714
		715	{
		716	unsigned char o_events = anfd->events;
		717	unsigned char o_reify = anfd->reify;
		718
435	anfd->reify = 0;	719	anfd->reify = 0;
436
437	method_modify (EV_A_ fd, anfd->events, events);
438	anfd->events = events;	720	anfd->events = events;
		721
		722	if (o_events != events || o_reify & EV_IOFDSET)
		723	backend_modify (EV_A_ fd, o_events, events);
		724	}
439	}	725	}
440		726
441	fdchangecnt = 0;	727	fdchangecnt = 0;
442	}	728	}
443		729
444	static void	730	void inline_size
445	fd_change (EV_P_ int fd)	731	fd_change (EV_P_ int fd, int flags)
446	{	732	{
447	if (anfds [fd].reify)	733	unsigned char reify = anfds [fd].reify;
448	return;
449
450	anfds [fd].reify = 1;	734	anfds [fd].reify |= flags;
451		735
		736	if (expect_true (!reify))
		737	{
452	++fdchangecnt;	738	++fdchangecnt;
453	array_needsize (fdchanges, fdchangemax, fdchangecnt, (void));	739	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
454	fdchanges [fdchangecnt - 1] = fd;	740	fdchanges [fdchangecnt - 1] = fd;
		741	}
455	}	742	}
456		743
457	static void	744	void inline_speed
458	fd_kill (EV_P_ int fd)	745	fd_kill (EV_P_ int fd)
459	{	746	{
460	struct ev_io *w;	747	ev_io *w;
461		748
462	while ((w = (struct ev_io *)anfds [fd].head))	749	while ((w = (ev_io *)anfds [fd].head))
463	{	750	{
464	ev_io_stop (EV_A_ w);	751	ev_io_stop (EV_A_ w);
465	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	752	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
466	}	753	}
467	}	754	}
468		755
469	static int	756	int inline_size
470	fd_valid (int fd)	757	fd_valid (int fd)
471	{	758	{
472	#ifdef WIN32	759	#ifdef _WIN32
473	return !!win32_get_osfhandle (fd);	760	return _get_osfhandle (fd) != -1;
474	#else	761	#else
475	return fcntl (fd, F_GETFD) != -1;	762	return fcntl (fd, F_GETFD) != -1;
476	#endif	763	#endif
477	}	764	}
478		765
479	/* called on EBADF to verify fds */	766	/* called on EBADF to verify fds */
480	static void	767	static void noinline
481	fd_ebadf (EV_P)	768	fd_ebadf (EV_P)
482	{	769	{
483	int fd;	770	int fd;
484		771
485	for (fd = 0; fd < anfdmax; ++fd)	772	for (fd = 0; fd < anfdmax; ++fd)
…		…
487	if (!fd_valid (fd) == -1 && errno == EBADF)	774	if (!fd_valid (fd) == -1 && errno == EBADF)
488	fd_kill (EV_A_ fd);	775	fd_kill (EV_A_ fd);
489	}	776	}
490		777
491	/* called on ENOMEM in select/poll to kill some fds and retry */	778	/* called on ENOMEM in select/poll to kill some fds and retry */
492	static void	779	static void noinline
493	fd_enomem (EV_P)	780	fd_enomem (EV_P)
494	{	781	{
495	int fd;	782	int fd;
496		783
497	for (fd = anfdmax; fd--; )	784	for (fd = anfdmax; fd--; )
…		…
500	fd_kill (EV_A_ fd);	787	fd_kill (EV_A_ fd);
501	return;	788	return;
502	}	789	}
503	}	790	}
504		791
505	/* usually called after fork if method needs to re-arm all fds from scratch */	792	/* usually called after fork if backend needs to re-arm all fds from scratch */
506	static void	793	static void noinline
507	fd_rearm_all (EV_P)	794	fd_rearm_all (EV_P)
508	{	795	{
509	int fd;	796	int fd;
510		797
511	/* this should be highly optimised to not do anything but set a flag */
512	for (fd = 0; fd < anfdmax; ++fd)	798	for (fd = 0; fd < anfdmax; ++fd)
513	if (anfds [fd].events)	799	if (anfds [fd].events)
514	{	800	{
515	anfds [fd].events = 0;	801	anfds [fd].events = 0;
516	fd_change (EV_A_ fd);	802	fd_change (EV_A_ fd, EV_IOFDSET | 1);
517	}	803	}
518	}	804	}
519		805
520	/*****************************************************************************/	806	/*****************************************************************************/
521		807
		808	/*
		809	* the heap functions want a real array index. array index 0 uis guaranteed to not
		810	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		811	* the branching factor of the d-tree.
		812	*/
		813
		814	/*
		815	* at the moment we allow libev the luxury of two heaps,
		816	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		817	* which is more cache-efficient.
		818	* the difference is about 5% with 50000+ watchers.
		819	*/
		820	#if EV_USE_4HEAP
		821
		822	#define DHEAP 4
		823	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		824	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
		825	#define UPHEAP_DONE(p,k) ((p) == (k))
		826
		827	/* away from the root */
		828	void inline_speed
		829	downheap (ANHE *heap, int N, int k)
		830	{
		831	ANHE he = heap [k];
		832	ANHE *E = heap + N + HEAP0;
		833
		834	for (;;)
		835	{
		836	ev_tstamp minat;
		837	ANHE *minpos;
		838	ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
		839
		840	/* find minimum child */
		841	if (expect_true (pos + DHEAP - 1 < E))
		842	{
		843	/* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		844	if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		845	if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		846	if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		847	}
		848	else if (pos < E)
		849	{
		850	/* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
		851	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		852	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		853	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		854	}
		855	else
		856	break;
		857
		858	if (ANHE_at (he) <= minat)
		859	break;
		860
		861	heap [k] = *minpos;
		862	ev_active (ANHE_w (*minpos)) = k;
		863
		864	k = minpos - heap;
		865	}
		866
		867	heap [k] = he;
		868	ev_active (ANHE_w (he)) = k;
		869	}
		870
		871	#else /* 4HEAP */
		872
		873	#define HEAP0 1
		874	#define HPARENT(k) ((k) >> 1)
		875	#define UPHEAP_DONE(p,k) (!(p))
		876
		877	/* away from the root */
		878	void inline_speed
		879	downheap (ANHE *heap, int N, int k)
		880	{
		881	ANHE he = heap [k];
		882
		883	for (;;)
		884	{
		885	int c = k << 1;
		886
		887	if (c > N + HEAP0 - 1)
		888	break;
		889
		890	c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		891	? 1 : 0;
		892
		893	if (ANHE_at (he) <= ANHE_at (heap [c]))
		894	break;
		895
		896	heap [k] = heap [c];
		897	ev_active (ANHE_w (heap [k])) = k;
		898
		899	k = c;
		900	}
		901
		902	heap [k] = he;
		903	ev_active (ANHE_w (he)) = k;
		904	}
		905	#endif
		906
		907	/* towards the root */
		908	void inline_speed
		909	upheap (ANHE *heap, int k)
		910	{
		911	ANHE he = heap [k];
		912
		913	for (;;)
		914	{
		915	int p = HPARENT (k);
		916
		917	if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
		918	break;
		919
		920	heap [k] = heap [p];
		921	ev_active (ANHE_w (heap [k])) = k;
		922	k = p;
		923	}
		924
		925	heap [k] = he;
		926	ev_active (ANHE_w (he)) = k;
		927	}
		928
		929	void inline_size
		930	adjustheap (ANHE *heap, int N, int k)
		931	{
		932	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
		933	upheap (heap, k);
		934	else
		935	downheap (heap, N, k);
		936	}
		937
		938	/* rebuild the heap: this function is used only once and executed rarely */
		939	void inline_size
		940	reheap (ANHE *heap, int N)
		941	{
		942	int i;
		943	/* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
		944	/* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
		945	for (i = 0; i < N; ++i)
		946	upheap (heap, i + HEAP0);
		947	}
		948
		949	#if EV_VERIFY
522	static void	950	static void
523	upheap (WT *heap, int k)	951	checkheap (ANHE *heap, int N)
524	{	952	{
525	WT w = heap [k];	953	int i;
526		954
527	while (k && heap [k >> 1]->at > w->at)	955	for (i = HEAP0; i < N + HEAP0; ++i)
528	{
529	heap [k] = heap [k >> 1];
530	((W)heap [k])->active = k + 1;
531	k >>= 1;
532	}	956	{
533		957	assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
534	heap [k] = w;	958	assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
535	((W)heap [k])->active = k + 1;	959	assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
536
537	}
538
539	static void
540	downheap (WT *heap, int N, int k)
541	{
542	WT w = heap [k];
543
544	while (k < (N >> 1))
545	{	960	}
546	int j = k << 1;
547
548	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
549	++j;
550
551	if (w->at <= heap [j]->at)
552	break;
553
554	heap [k] = heap [j];
555	((W)heap [k])->active = k + 1;
556	k = j;
557	}
558
559	heap [k] = w;
560	((W)heap [k])->active = k + 1;
561	}	961	}
		962	#endif
562		963
563	/*****************************************************************************/	964	/*****************************************************************************/
564		965
565	typedef struct	966	typedef struct
566	{	967	{
567	WL head;	968	WL head;
568	sig_atomic_t volatile gotsig;	969	EV_ATOMIC_T gotsig;
569	} ANSIG;	970	} ANSIG;
570		971
571	static ANSIG *signals;	972	static ANSIG *signals;
572	static int signalmax;	973	static int signalmax;
573		974
574	static int sigpipe [2];	975	static EV_ATOMIC_T gotsig;
575	static sig_atomic_t volatile gotsig;
576	static struct ev_io sigev;
577		976
578	static void	977	void inline_size
579	signals_init (ANSIG *base, int count)	978	signals_init (ANSIG *base, int count)
580	{	979	{
581	while (count--)	980	while (count--)
582	{	981	{
583	base->head = 0;	982	base->head = 0;
…		…
585		984
586	++base;	985	++base;
587	}	986	}
588	}	987	}
589		988
		989	/*****************************************************************************/
		990
		991	void inline_speed
		992	fd_intern (int fd)
		993	{
		994	#ifdef _WIN32
		995	int arg = 1;
		996	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		997	#else
		998	fcntl (fd, F_SETFD, FD_CLOEXEC);
		999	fcntl (fd, F_SETFL, O_NONBLOCK);
		1000	#endif
		1001	}
		1002
		1003	static void noinline
		1004	evpipe_init (EV_P)
		1005	{
		1006	if (!ev_is_active (&pipeev))
		1007	{
		1008	#if EV_USE_EVENTFD
		1009	if ((evfd = eventfd (0, 0)) >= 0)
		1010	{
		1011	evpipe [0] = -1;
		1012	fd_intern (evfd);
		1013	ev_io_set (&pipeev, evfd, EV_READ);
		1014	}
		1015	else
		1016	#endif
		1017	{
		1018	while (pipe (evpipe))
		1019	syserr ("(libev) error creating signal/async pipe");
		1020
		1021	fd_intern (evpipe [0]);
		1022	fd_intern (evpipe [1]);
		1023	ev_io_set (&pipeev, evpipe [0], EV_READ);
		1024	}
		1025
		1026	ev_io_start (EV_A_ &pipeev);
		1027	ev_unref (EV_A); /* watcher should not keep loop alive */
		1028	}
		1029	}
		1030
		1031	void inline_size
		1032	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1033	{
		1034	if (!*flag)
		1035	{
		1036	int old_errno = errno; /* save errno because write might clobber it */
		1037
		1038	*flag = 1;
		1039
		1040	#if EV_USE_EVENTFD
		1041	if (evfd >= 0)
		1042	{
		1043	uint64_t counter = 1;
		1044	write (evfd, &counter, sizeof (uint64_t));
		1045	}
		1046	else
		1047	#endif
		1048	write (evpipe [1], &old_errno, 1);
		1049
		1050	errno = old_errno;
		1051	}
		1052	}
		1053
590	static void	1054	static void
		1055	pipecb (EV_P_ ev_io *iow, int revents)
		1056	{
		1057	#if EV_USE_EVENTFD
		1058	if (evfd >= 0)
		1059	{
		1060	uint64_t counter;
		1061	read (evfd, &counter, sizeof (uint64_t));
		1062	}
		1063	else
		1064	#endif
		1065	{
		1066	char dummy;
		1067	read (evpipe [0], &dummy, 1);
		1068	}
		1069
		1070	if (gotsig && ev_is_default_loop (EV_A))
		1071	{
		1072	int signum;
		1073	gotsig = 0;
		1074
		1075	for (signum = signalmax; signum--; )
		1076	if (signals [signum].gotsig)
		1077	ev_feed_signal_event (EV_A_ signum + 1);
		1078	}
		1079
		1080	#if EV_ASYNC_ENABLE
		1081	if (gotasync)
		1082	{
		1083	int i;
		1084	gotasync = 0;
		1085
		1086	for (i = asynccnt; i--; )
		1087	if (asyncs [i]->sent)
		1088	{
		1089	asyncs [i]->sent = 0;
		1090	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1091	}
		1092	}
		1093	#endif
		1094	}
		1095
		1096	/*****************************************************************************/
		1097
		1098	static void
591	sighandler (int signum)	1099	ev_sighandler (int signum)
592	{	1100	{
		1101	#if EV_MULTIPLICITY
		1102	struct ev_loop *loop = &default_loop_struct;
		1103	#endif
		1104
593	#if WIN32	1105	#if _WIN32
594	signal (signum, sighandler);	1106	signal (signum, ev_sighandler);
595	#endif	1107	#endif
596		1108
597	signals [signum - 1].gotsig = 1;	1109	signals [signum - 1].gotsig = 1;
598		1110	evpipe_write (EV_A_ &gotsig);
599	if (!gotsig)
600	{
601	int old_errno = errno;
602	gotsig = 1;
603	write (sigpipe [1], &signum, 1);
604	errno = old_errno;
605	}
606	}	1111	}
607		1112
608	static void	1113	void noinline
609	sigcb (EV_P_ struct ev_io *iow, int revents)	1114	ev_feed_signal_event (EV_P_ int signum)
610	{	1115	{
611	WL w;	1116	WL w;
		1117
		1118	#if EV_MULTIPLICITY
		1119	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1120	#endif
		1121
612	int signum;	1122	--signum;
613		1123
614	read (sigpipe [0], &revents, 1);	1124	if (signum < 0 || signum >= signalmax)
615	gotsig = 0;	1125	return;
616		1126
617	for (signum = signalmax; signum--; )
618	if (signals [signum].gotsig)
619	{
620	signals [signum].gotsig = 0;	1127	signals [signum].gotsig = 0;
621		1128
622	for (w = signals [signum].head; w; w = w->next)	1129	for (w = signals [signum].head; w; w = w->next)
623	event (EV_A_ (W)w, EV_SIGNAL);	1130	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
624	}
625	}
626
627	static void
628	siginit (EV_P)
629	{
630	#ifndef WIN32
631	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
632	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
633
634	/* rather than sort out wether we really need nb, set it */
635	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
636	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
637	#endif
638
639	ev_io_set (&sigev, sigpipe [0], EV_READ);
640	ev_io_start (EV_A_ &sigev);
641	ev_unref (EV_A); /* child watcher should not keep loop alive */
642	}	1131	}
643		1132
644	/*****************************************************************************/	1133	/*****************************************************************************/
645		1134
646	static struct ev_child *childs [PID_HASHSIZE];	1135	static WL childs [EV_PID_HASHSIZE];
647		1136
648	#ifndef WIN32	1137	#ifndef _WIN32
649		1138
650	static struct ev_signal childev;	1139	static ev_signal childev;
		1140
		1141	#ifndef WIFCONTINUED
		1142	# define WIFCONTINUED(status) 0
		1143	#endif
		1144
		1145	void inline_speed
		1146	child_reap (EV_P_ int chain, int pid, int status)
		1147	{
		1148	ev_child *w;
		1149	int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
		1150
		1151	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		1152	{
		1153	if ((w->pid == pid || !w->pid)
		1154	&& (!traced || (w->flags & 1)))
		1155	{
		1156	ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
		1157	w->rpid = pid;
		1158	w->rstatus = status;
		1159	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		1160	}
		1161	}
		1162	}
651		1163
652	#ifndef WCONTINUED	1164	#ifndef WCONTINUED
653	# define WCONTINUED 0	1165	# define WCONTINUED 0
654	#endif	1166	#endif
655		1167
656	static void	1168	static void
657	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
658	{
659	struct ev_child *w;
660
661	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
662	if (w->pid == pid || !w->pid)
663	{
664	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
665	w->rpid = pid;
666	w->rstatus = status;
667	event (EV_A_ (W)w, EV_CHILD);
668	}
669	}
670
671	static void
672	childcb (EV_P_ struct ev_signal *sw, int revents)	1169	childcb (EV_P_ ev_signal *sw, int revents)
673	{	1170	{
674	int pid, status;	1171	int pid, status;
675		1172
		1173	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
676	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	1174	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
677	{	1175	if (!WCONTINUED
		1176	|| errno != EINVAL
		1177	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		1178	return;
		1179
678	/* make sure we are called again until all childs have been reaped */	1180	/* make sure we are called again until all children have been reaped */
		1181	/* we need to do it this way so that the callback gets called before we continue */
679	event (EV_A_ (W)sw, EV_SIGNAL);	1182	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
680		1183
681	child_reap (EV_A_ sw, pid, pid, status);	1184	child_reap (EV_A_ pid, pid, status);
		1185	if (EV_PID_HASHSIZE > 1)
682	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	1186	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
683	}
684	}	1187	}
685		1188
686	#endif	1189	#endif
687		1190
688	/*****************************************************************************/	1191	/*****************************************************************************/
689		1192
		1193	#if EV_USE_PORT
		1194	# include "ev_port.c"
		1195	#endif
690	#if EV_USE_KQUEUE	1196	#if EV_USE_KQUEUE
691	# include "ev_kqueue.c"	1197	# include "ev_kqueue.c"
692	#endif	1198	#endif
693	#if EV_USE_EPOLL	1199	#if EV_USE_EPOLL
694	# include "ev_epoll.c"	1200	# include "ev_epoll.c"
…		…
711	{	1217	{
712	return EV_VERSION_MINOR;	1218	return EV_VERSION_MINOR;
713	}	1219	}
714		1220
715	/* return true if we are running with elevated privileges and should ignore env variables */	1221	/* return true if we are running with elevated privileges and should ignore env variables */
716	static int	1222	int inline_size
717	enable_secure (void)	1223	enable_secure (void)
718	{	1224	{
719	#ifdef WIN32	1225	#ifdef _WIN32
720	return 0;	1226	return 0;
721	#else	1227	#else
722	return getuid () != geteuid ()	1228	return getuid () != geteuid ()
723	|| getgid () != getegid ();	1229	|| getgid () != getegid ();
724	#endif	1230	#endif
725	}	1231	}
726		1232
727	int	1233	unsigned int
728	ev_method (EV_P)	1234	ev_supported_backends (void)
729	{	1235	{
730	return method;	1236	unsigned int flags = 0;
731	}
732		1237
733	static void	1238	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
734	loop_init (EV_P_ int methods)	1239	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		1240	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		1241	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		1242	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		1243
		1244	return flags;
		1245	}
		1246
		1247	unsigned int
		1248	ev_recommended_backends (void)
735	{	1249	{
736	if (!method)	1250	unsigned int flags = ev_supported_backends ();
		1251
		1252	#ifndef __NetBSD__
		1253	/* kqueue is borked on everything but netbsd apparently */
		1254	/* it usually doesn't work correctly on anything but sockets and pipes */
		1255	flags &= ~EVBACKEND_KQUEUE;
		1256	#endif
		1257	#ifdef __APPLE__
		1258	// flags &= ~EVBACKEND_KQUEUE; for documentation
		1259	flags &= ~EVBACKEND_POLL;
		1260	#endif
		1261
		1262	return flags;
		1263	}
		1264
		1265	unsigned int
		1266	ev_embeddable_backends (void)
		1267	{
		1268	int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
		1269
		1270	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1271	/* please fix it and tell me how to detect the fix */
		1272	flags &= ~EVBACKEND_EPOLL;
		1273
		1274	return flags;
		1275	}
		1276
		1277	unsigned int
		1278	ev_backend (EV_P)
		1279	{
		1280	return backend;
		1281	}
		1282
		1283	unsigned int
		1284	ev_loop_count (EV_P)
		1285	{
		1286	return loop_count;
		1287	}
		1288
		1289	void
		1290	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1291	{
		1292	io_blocktime = interval;
		1293	}
		1294
		1295	void
		1296	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1297	{
		1298	timeout_blocktime = interval;
		1299	}
		1300
		1301	static void noinline
		1302	loop_init (EV_P_ unsigned int flags)
		1303	{
		1304	if (!backend)
737	{	1305	{
738	#if EV_USE_MONOTONIC	1306	#if EV_USE_MONOTONIC
739	{	1307	{
740	struct timespec ts;	1308	struct timespec ts;
741	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1309	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
742	have_monotonic = 1;	1310	have_monotonic = 1;
743	}	1311	}
744	#endif	1312	#endif
745		1313
746	rt_now = ev_time ();	1314	ev_rt_now = ev_time ();
747	mn_now = get_clock ();	1315	mn_now = get_clock ();
748	now_floor = mn_now;	1316	now_floor = mn_now;
749	rtmn_diff = rt_now - mn_now;	1317	rtmn_diff = ev_rt_now - mn_now;
750		1318
751	if (methods == EVMETHOD_AUTO)	1319	io_blocktime = 0.;
752	if (!enable_secure () && getenv ("LIBEV_METHODS"))	1320	timeout_blocktime = 0.;
		1321	backend = 0;
		1322	backend_fd = -1;
		1323	gotasync = 0;
		1324	#if EV_USE_INOTIFY
		1325	fs_fd = -2;
		1326	#endif
		1327
		1328	/* pid check not overridable via env */
		1329	#ifndef _WIN32
		1330	if (flags & EVFLAG_FORKCHECK)
		1331	curpid = getpid ();
		1332	#endif
		1333
		1334	if (!(flags & EVFLAG_NOENV)
		1335	&& !enable_secure ()
		1336	&& getenv ("LIBEV_FLAGS"))
753	methods = atoi (getenv ("LIBEV_METHODS"));	1337	flags = atoi (getenv ("LIBEV_FLAGS"));
754	else
755	methods = EVMETHOD_ANY;
756		1338
757	method = 0;	1339	if (!(flags & 0x0000ffffU))
758	#if EV_USE_WIN32	1340	flags |= ev_recommended_backends ();
759	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);	1341
		1342	#if EV_USE_PORT
		1343	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
760	#endif	1344	#endif
761	#if EV_USE_KQUEUE	1345	#if EV_USE_KQUEUE
762	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);	1346	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
763	#endif	1347	#endif
764	#if EV_USE_EPOLL	1348	#if EV_USE_EPOLL
765	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);	1349	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
766	#endif	1350	#endif
767	#if EV_USE_POLL	1351	#if EV_USE_POLL
768	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);	1352	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
769	#endif	1353	#endif
770	#if EV_USE_SELECT	1354	#if EV_USE_SELECT
771	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);	1355	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
772	#endif	1356	#endif
773		1357
774	ev_watcher_init (&sigev, sigcb);	1358	ev_init (&pipeev, pipecb);
775	ev_set_priority (&sigev, EV_MAXPRI);	1359	ev_set_priority (&pipeev, EV_MAXPRI);
776	}	1360	}
777	}	1361	}
778		1362
779	void	1363	static void noinline
780	loop_destroy (EV_P)	1364	loop_destroy (EV_P)
781	{	1365	{
782	int i;	1366	int i;
783		1367
		1368	if (ev_is_active (&pipeev))
		1369	{
		1370	ev_ref (EV_A); /* signal watcher */
		1371	ev_io_stop (EV_A_ &pipeev);
		1372
		1373	#if EV_USE_EVENTFD
		1374	if (evfd >= 0)
		1375	close (evfd);
		1376	#endif
		1377
		1378	if (evpipe [0] >= 0)
		1379	{
		1380	close (evpipe [0]);
		1381	close (evpipe [1]);
		1382	}
		1383	}
		1384
784	#if EV_USE_WIN32	1385	#if EV_USE_INOTIFY
785	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);	1386	if (fs_fd >= 0)
		1387	close (fs_fd);
		1388	#endif
		1389
		1390	if (backend_fd >= 0)
		1391	close (backend_fd);
		1392
		1393	#if EV_USE_PORT
		1394	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
786	#endif	1395	#endif
787	#if EV_USE_KQUEUE	1396	#if EV_USE_KQUEUE
788	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);	1397	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
789	#endif	1398	#endif
790	#if EV_USE_EPOLL	1399	#if EV_USE_EPOLL
791	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);	1400	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
792	#endif	1401	#endif
793	#if EV_USE_POLL	1402	#if EV_USE_POLL
794	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);	1403	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
795	#endif	1404	#endif
796	#if EV_USE_SELECT	1405	#if EV_USE_SELECT
797	if (method == EVMETHOD_SELECT) select_destroy (EV_A);	1406	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
798	#endif	1407	#endif
799		1408
800	for (i = NUMPRI; i--; )	1409	for (i = NUMPRI; i--; )
		1410	{
801	array_free (pending, [i]);	1411	array_free (pending, [i]);
		1412	#if EV_IDLE_ENABLE
		1413	array_free (idle, [i]);
		1414	#endif
		1415	}
		1416
		1417	ev_free (anfds); anfdmax = 0;
802		1418
803	/* have to use the microsoft-never-gets-it-right macro */	1419	/* have to use the microsoft-never-gets-it-right macro */
804	array_free_microshit (fdchange);	1420	array_free (fdchange, EMPTY);
805	array_free_microshit (timer);	1421	array_free (timer, EMPTY);
806	array_free_microshit (periodic);	1422	#if EV_PERIODIC_ENABLE
807	array_free_microshit (idle);	1423	array_free (periodic, EMPTY);
808	array_free_microshit (prepare);	1424	#endif
809	array_free_microshit (check);	1425	#if EV_FORK_ENABLE
		1426	array_free (fork, EMPTY);
		1427	#endif
		1428	array_free (prepare, EMPTY);
		1429	array_free (check, EMPTY);
		1430	#if EV_ASYNC_ENABLE
		1431	array_free (async, EMPTY);
		1432	#endif
810		1433
811	method = 0;	1434	backend = 0;
812	}	1435	}
813		1436
814	static void	1437	#if EV_USE_INOTIFY
		1438	void inline_size infy_fork (EV_P);
		1439	#endif
		1440
		1441	void inline_size
815	loop_fork (EV_P)	1442	loop_fork (EV_P)
816	{	1443	{
		1444	#if EV_USE_PORT
		1445	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1446	#endif
		1447	#if EV_USE_KQUEUE
		1448	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1449	#endif
817	#if EV_USE_EPOLL	1450	#if EV_USE_EPOLL
818	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);	1451	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
819	#endif	1452	#endif
820	#if EV_USE_KQUEUE	1453	#if EV_USE_INOTIFY
821	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);	1454	infy_fork (EV_A);
822	#endif	1455	#endif
823		1456
824	if (ev_is_active (&sigev))	1457	if (ev_is_active (&pipeev))
825	{	1458	{
826	/* default loop */	1459	/* this "locks" the handlers against writing to the pipe */
		1460	/* while we modify the fd vars */
		1461	gotsig = 1;
		1462	#if EV_ASYNC_ENABLE
		1463	gotasync = 1;
		1464	#endif
827		1465
828	ev_ref (EV_A);	1466	ev_ref (EV_A);
829	ev_io_stop (EV_A_ &sigev);	1467	ev_io_stop (EV_A_ &pipeev);
		1468
		1469	#if EV_USE_EVENTFD
		1470	if (evfd >= 0)
		1471	close (evfd);
		1472	#endif
		1473
		1474	if (evpipe [0] >= 0)
		1475	{
830	close (sigpipe [0]);	1476	close (evpipe [0]);
831	close (sigpipe [1]);	1477	close (evpipe [1]);
		1478	}
832		1479
833	while (ev_pipe (sigpipe))
834	syserr ("(libev) error creating pipe");
835
836	siginit (EV_A);	1480	evpipe_init (EV_A);
		1481	/* now iterate over everything, in case we missed something */
		1482	pipecb (EV_A_ &pipeev, EV_READ);
837	}	1483	}
838		1484
839	postfork = 0;	1485	postfork = 0;
840	}	1486	}
841		1487
842	#if EV_MULTIPLICITY	1488	#if EV_MULTIPLICITY
843	struct ev_loop *	1489	struct ev_loop *
844	ev_loop_new (int methods)	1490	ev_loop_new (unsigned int flags)
845	{	1491	{
846	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));	1492	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
847		1493
848	memset (loop, 0, sizeof (struct ev_loop));	1494	memset (loop, 0, sizeof (struct ev_loop));
849		1495
850	loop_init (EV_A_ methods);	1496	loop_init (EV_A_ flags);
851		1497
852	if (ev_method (EV_A))	1498	if (ev_backend (EV_A))
853	return loop;	1499	return loop;
854		1500
855	return 0;	1501	return 0;
856	}	1502	}
857		1503
…		…
863	}	1509	}
864		1510
865	void	1511	void
866	ev_loop_fork (EV_P)	1512	ev_loop_fork (EV_P)
867	{	1513	{
868	postfork = 1;	1514	postfork = 1; /* must be in line with ev_default_fork */
869	}	1515	}
		1516
		1517	#if EV_VERIFY
		1518	static void
		1519	array_check (W **ws, int cnt)
		1520	{
		1521	while (cnt--)
		1522	assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
		1523	}
		1524
		1525	static void
		1526	ev_loop_verify (EV_P)
		1527	{
		1528	int i;
		1529
		1530	checkheap (timers, timercnt);
		1531	#if EV_PERIODIC_ENABLE
		1532	checkheap (periodics, periodiccnt);
		1533	#endif
		1534
		1535	#if EV_IDLE_ENABLE
		1536	for (i = NUMPRI; i--; )
		1537	array_check ((W **)idles [i], idlecnt [i]);
		1538	#endif
		1539	#if EV_FORK_ENABLE
		1540	array_check ((W **)forks, forkcnt);
		1541	#endif
		1542	array_check ((W **)prepares, preparecnt);
		1543	array_check ((W **)checks, checkcnt);
		1544	#if EV_ASYNC_ENABLE
		1545	array_check ((W **)asyncs, asynccnt);
		1546	#endif
		1547	}
		1548	#endif
870		1549
871	#endif	1550	#endif
872		1551
873	#if EV_MULTIPLICITY	1552	#if EV_MULTIPLICITY
874	struct ev_loop default_loop_struct;
875	static struct ev_loop *default_loop;
876
877	struct ev_loop *	1553	struct ev_loop *
		1554	ev_default_loop_init (unsigned int flags)
878	#else	1555	#else
879	static int default_loop;
880
881	int	1556	int
		1557	ev_default_loop (unsigned int flags)
882	#endif	1558	#endif
883	ev_default_loop (int methods)
884	{	1559	{
885	if (sigpipe [0] == sigpipe [1])
886	if (ev_pipe (sigpipe))
887	return 0;
888
889	if (!default_loop)	1560	if (!ev_default_loop_ptr)
890	{	1561	{
891	#if EV_MULTIPLICITY	1562	#if EV_MULTIPLICITY
892	struct ev_loop *loop = default_loop = &default_loop_struct;	1563	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
893	#else	1564	#else
894	default_loop = 1;	1565	ev_default_loop_ptr = 1;
895	#endif	1566	#endif
896		1567
897	loop_init (EV_A_ methods);	1568	loop_init (EV_A_ flags);
898		1569
899	if (ev_method (EV_A))	1570	if (ev_backend (EV_A))
900	{	1571	{
901	siginit (EV_A);
902
903	#ifndef WIN32	1572	#ifndef _WIN32
904	ev_signal_init (&childev, childcb, SIGCHLD);	1573	ev_signal_init (&childev, childcb, SIGCHLD);
905	ev_set_priority (&childev, EV_MAXPRI);	1574	ev_set_priority (&childev, EV_MAXPRI);
906	ev_signal_start (EV_A_ &childev);	1575	ev_signal_start (EV_A_ &childev);
907	ev_unref (EV_A); /* child watcher should not keep loop alive */	1576	ev_unref (EV_A); /* child watcher should not keep loop alive */
908	#endif	1577	#endif
909	}	1578	}
910	else	1579	else
911	default_loop = 0;	1580	ev_default_loop_ptr = 0;
912	}	1581	}
913		1582
914	return default_loop;	1583	return ev_default_loop_ptr;
915	}	1584	}
916		1585
917	void	1586	void
918	ev_default_destroy (void)	1587	ev_default_destroy (void)
919	{	1588	{
920	#if EV_MULTIPLICITY	1589	#if EV_MULTIPLICITY
921	struct ev_loop *loop = default_loop;	1590	struct ev_loop *loop = ev_default_loop_ptr;
922	#endif	1591	#endif
923		1592
924	#ifndef WIN32	1593	#ifndef _WIN32
925	ev_ref (EV_A); /* child watcher */	1594	ev_ref (EV_A); /* child watcher */
926	ev_signal_stop (EV_A_ &childev);	1595	ev_signal_stop (EV_A_ &childev);
927	#endif	1596	#endif
928		1597
929	ev_ref (EV_A); /* signal watcher */
930	ev_io_stop (EV_A_ &sigev);
931
932	close (sigpipe [0]); sigpipe [0] = 0;
933	close (sigpipe [1]); sigpipe [1] = 0;
934
935	loop_destroy (EV_A);	1598	loop_destroy (EV_A);
936	}	1599	}
937		1600
938	void	1601	void
939	ev_default_fork (void)	1602	ev_default_fork (void)
940	{	1603	{
941	#if EV_MULTIPLICITY	1604	#if EV_MULTIPLICITY
942	struct ev_loop *loop = default_loop;	1605	struct ev_loop *loop = ev_default_loop_ptr;
943	#endif	1606	#endif
944		1607
945	if (method)	1608	if (backend)
946	postfork = 1;	1609	postfork = 1; /* must be in line with ev_loop_fork */
947	}	1610	}
948		1611
949	/*****************************************************************************/	1612	/*****************************************************************************/
950		1613
951	static void	1614	void
		1615	ev_invoke (EV_P_ void *w, int revents)
		1616	{
		1617	EV_CB_INVOKE ((W)w, revents);
		1618	}
		1619
		1620	void inline_speed
952	call_pending (EV_P)	1621	call_pending (EV_P)
953	{	1622	{
954	int pri;	1623	int pri;
		1624
		1625	EV_FREQUENT_CHECK;
955		1626
956	for (pri = NUMPRI; pri--; )	1627	for (pri = NUMPRI; pri--; )
957	while (pendingcnt [pri])	1628	while (pendingcnt [pri])
958	{	1629	{
959	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1630	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
960		1631
961	if (p->w)	1632	if (expect_true (p->w))
962	{	1633	{
		1634	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1635
963	p->w->pending = 0;	1636	p->w->pending = 0;
964	p->w->cb (EV_A_ p->w, p->events);	1637	EV_CB_INVOKE (p->w, p->events);
965	}	1638	}
966	}	1639	}
967	}
968		1640
969	static void	1641	EV_FREQUENT_CHECK;
		1642	}
		1643
		1644	#if EV_IDLE_ENABLE
		1645	void inline_size
		1646	idle_reify (EV_P)
		1647	{
		1648	if (expect_false (idleall))
		1649	{
		1650	int pri;
		1651
		1652	for (pri = NUMPRI; pri--; )
		1653	{
		1654	if (pendingcnt [pri])
		1655	break;
		1656
		1657	if (idlecnt [pri])
		1658	{
		1659	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1660	break;
		1661	}
		1662	}
		1663	}
		1664	}
		1665	#endif
		1666
		1667	void inline_size
970	timers_reify (EV_P)	1668	timers_reify (EV_P)
971	{	1669	{
		1670	EV_FREQUENT_CHECK;
		1671
972	while (timercnt && ((WT)timers [0])->at <= mn_now)	1672	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
973	{	1673	{
974	struct ev_timer *w = timers [0];	1674	ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
975		1675
976	assert (("inactive timer on timer heap detected", ev_is_active (w)));	1676	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
977		1677
978	/* first reschedule or stop timer */	1678	/* first reschedule or stop timer */
979	if (w->repeat)	1679	if (w->repeat)
980	{	1680	{
		1681	ev_at (w) += w->repeat;
		1682	if (ev_at (w) < mn_now)
		1683	ev_at (w) = mn_now;
		1684
981	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1685	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
982	((WT)w)->at = mn_now + w->repeat;	1686
		1687	ANHE_at_cache (timers [HEAP0]);
983	downheap ((WT *)timers, timercnt, 0);	1688	downheap (timers, timercnt, HEAP0);
984	}	1689	}
985	else	1690	else
986	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1691	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
987		1692
		1693	EV_FREQUENT_CHECK;
988	event (EV_A_ (W)w, EV_TIMEOUT);	1694	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
989	}	1695	}
990	}	1696	}
991		1697
992	static void	1698	#if EV_PERIODIC_ENABLE
		1699	void inline_size
993	periodics_reify (EV_P)	1700	periodics_reify (EV_P)
994	{	1701	{
		1702	EV_FREQUENT_CHECK;
995	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)	1703	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
996	{	1704	{
997	struct ev_periodic *w = periodics [0];	1705	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
998		1706
999	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	1707	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1000		1708
1001	/* first reschedule or stop timer */	1709	/* first reschedule or stop timer */
1002	if (w->interval)	1710	if (w->reschedule_cb)
1003	{	1711	{
1004	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;	1712	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1005	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));	1713
		1714	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		1715
		1716	ANHE_at_cache (periodics [HEAP0]);
1006	downheap ((WT *)periodics, periodiccnt, 0);	1717	downheap (periodics, periodiccnt, HEAP0);
		1718	EV_FREQUENT_CHECK;
		1719	}
		1720	else if (w->interval)
		1721	{
		1722	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1723	/* if next trigger time is not sufficiently in the future, put it there */
		1724	/* this might happen because of floating point inexactness */
		1725	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1726	{
		1727	ev_at (w) += w->interval;
		1728
		1729	/* if interval is unreasonably low we might still have a time in the past */
		1730	/* so correct this. this will make the periodic very inexact, but the user */
		1731	/* has effectively asked to get triggered more often than possible */
		1732	if (ev_at (w) < ev_rt_now)
		1733	ev_at (w) = ev_rt_now;
		1734	}
		1735
		1736	ANHE_at_cache (periodics [HEAP0]);
		1737	downheap (periodics, periodiccnt, HEAP0);
1007	}	1738	}
1008	else	1739	else
1009	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1740	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1010		1741
		1742	EV_FREQUENT_CHECK;
1011	event (EV_A_ (W)w, EV_PERIODIC);	1743	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1012	}	1744	}
1013	}	1745	}
1014		1746
1015	static void	1747	static void noinline
1016	periodics_reschedule (EV_P)	1748	periodics_reschedule (EV_P)
1017	{	1749	{
1018	int i;	1750	int i;
1019		1751
1020	/* adjust periodics after time jump */	1752	/* adjust periodics after time jump */
1021	for (i = 0; i < periodiccnt; ++i)	1753	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1022	{	1754	{
1023	struct ev_periodic *w = periodics [i];	1755	ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1024		1756
		1757	if (w->reschedule_cb)
		1758	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1025	if (w->interval)	1759	else if (w->interval)
		1760	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1761
		1762	ANHE_at_cache (periodics [i]);
		1763	}
		1764
		1765	reheap (periodics, periodiccnt);
		1766	}
		1767	#endif
		1768
		1769	void inline_speed
		1770	time_update (EV_P_ ev_tstamp max_block)
		1771	{
		1772	int i;
		1773
		1774	#if EV_USE_MONOTONIC
		1775	if (expect_true (have_monotonic))
		1776	{
		1777	ev_tstamp odiff = rtmn_diff;
		1778
		1779	mn_now = get_clock ();
		1780
		1781	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1782	/* interpolate in the meantime */
		1783	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1026	{	1784	{
1027	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;	1785	ev_rt_now = rtmn_diff + mn_now;
		1786	return;
		1787	}
1028		1788
1029	if (fabs (diff) >= 1e-4)	1789	now_floor = mn_now;
		1790	ev_rt_now = ev_time ();
		1791
		1792	/* loop a few times, before making important decisions.
		1793	* on the choice of "4": one iteration isn't enough,
		1794	* in case we get preempted during the calls to
		1795	* ev_time and get_clock. a second call is almost guaranteed
		1796	* to succeed in that case, though. and looping a few more times
		1797	* doesn't hurt either as we only do this on time-jumps or
		1798	* in the unlikely event of having been preempted here.
		1799	*/
		1800	for (i = 4; --i; )
		1801	{
		1802	rtmn_diff = ev_rt_now - mn_now;
		1803
		1804	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
		1805	return; /* all is well */
		1806
		1807	ev_rt_now = ev_time ();
		1808	mn_now = get_clock ();
		1809	now_floor = mn_now;
		1810	}
		1811
		1812	# if EV_PERIODIC_ENABLE
		1813	periodics_reschedule (EV_A);
		1814	# endif
		1815	/* no timer adjustment, as the monotonic clock doesn't jump */
		1816	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1817	}
		1818	else
		1819	#endif
		1820	{
		1821	ev_rt_now = ev_time ();
		1822
		1823	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1824	{
		1825	#if EV_PERIODIC_ENABLE
		1826	periodics_reschedule (EV_A);
		1827	#endif
		1828	/* adjust timers. this is easy, as the offset is the same for all of them */
		1829	for (i = 0; i < timercnt; ++i)
1030	{	1830	{
1031	ev_periodic_stop (EV_A_ w);	1831	ANHE *he = timers + i + HEAP0;
1032	ev_periodic_start (EV_A_ w);	1832	ANHE_w (*he)->at += ev_rt_now - mn_now;
1033		1833	ANHE_at_cache (*he);
1034	i = 0; /* restart loop, inefficient, but time jumps should be rare */
1035	}	1834	}
1036	}	1835	}
1037	}
1038	}
1039		1836
1040	inline int
1041	time_update_monotonic (EV_P)
1042	{
1043	mn_now = get_clock ();
1044
1045	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1046	{
1047	rt_now = rtmn_diff + mn_now;
1048	return 0;
1049	}
1050	else
1051	{
1052	now_floor = mn_now;
1053	rt_now = ev_time ();
1054	return 1;
1055	}
1056	}
1057
1058	static void
1059	time_update (EV_P)
1060	{
1061	int i;
1062
1063	#if EV_USE_MONOTONIC
1064	if (expect_true (have_monotonic))
1065	{
1066	if (time_update_monotonic (EV_A))
1067	{
1068	ev_tstamp odiff = rtmn_diff;
1069
1070	for (i = 4; --i; ) /* loop a few times, before making important decisions */
1071	{
1072	rtmn_diff = rt_now - mn_now;
1073
1074	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
1075	return; /* all is well */
1076
1077	rt_now = ev_time ();
1078	mn_now = get_clock ();
1079	now_floor = mn_now;
1080	}
1081
1082	periodics_reschedule (EV_A);
1083	/* no timer adjustment, as the monotonic clock doesn't jump */
1084	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1085	}
1086	}
1087	else
1088	#endif
1089	{
1090	rt_now = ev_time ();
1091
1092	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1093	{
1094	periodics_reschedule (EV_A);
1095
1096	/* adjust timers. this is easy, as the offset is the same for all */
1097	for (i = 0; i < timercnt; ++i)
1098	((WT)timers [i])->at += rt_now - mn_now;
1099	}
1100
1101	mn_now = rt_now;	1837	mn_now = ev_rt_now;
1102	}	1838	}
1103	}	1839	}
1104		1840
1105	void	1841	void
1106	ev_ref (EV_P)	1842	ev_ref (EV_P)
…		…
1117	static int loop_done;	1853	static int loop_done;
1118		1854
1119	void	1855	void
1120	ev_loop (EV_P_ int flags)	1856	ev_loop (EV_P_ int flags)
1121	{	1857	{
1122	double block;	1858	loop_done = EVUNLOOP_CANCEL;
1123	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1859
		1860	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1124		1861
1125	do	1862	do
1126	{	1863	{
		1864	#ifndef _WIN32
		1865	if (expect_false (curpid)) /* penalise the forking check even more */
		1866	if (expect_false (getpid () != curpid))
		1867	{
		1868	curpid = getpid ();
		1869	postfork = 1;
		1870	}
		1871	#endif
		1872
		1873	#if EV_FORK_ENABLE
		1874	/* we might have forked, so queue fork handlers */
		1875	if (expect_false (postfork))
		1876	if (forkcnt)
		1877	{
		1878	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1879	call_pending (EV_A);
		1880	}
		1881	#endif
		1882
1127	/* queue check watchers (and execute them) */	1883	/* queue prepare watchers (and execute them) */
1128	if (expect_false (preparecnt))	1884	if (expect_false (preparecnt))
1129	{	1885	{
1130	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1886	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1131	call_pending (EV_A);	1887	call_pending (EV_A);
1132	}	1888	}
1133		1889
		1890	if (expect_false (!activecnt))
		1891	break;
		1892
1134	/* we might have forked, so reify kernel state if necessary */	1893	/* we might have forked, so reify kernel state if necessary */
1135	if (expect_false (postfork))	1894	if (expect_false (postfork))
1136	loop_fork (EV_A);	1895	loop_fork (EV_A);
1137		1896
1138	/* update fd-related kernel structures */	1897	/* update fd-related kernel structures */
1139	fd_reify (EV_A);	1898	fd_reify (EV_A);
1140		1899
1141	/* calculate blocking time */	1900	/* calculate blocking time */
		1901	{
		1902	ev_tstamp waittime = 0.;
		1903	ev_tstamp sleeptime = 0.;
1142		1904
1143	/* we only need this for !monotonic clockor timers, but as we basically	1905	if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1144	always have timers, we just calculate it always */
1145	#if EV_USE_MONOTONIC
1146	if (expect_true (have_monotonic))
1147	time_update_monotonic (EV_A);
1148	else
1149	#endif
1150	{	1906	{
1151	rt_now = ev_time ();	1907	/* update time to cancel out callback processing overhead */
1152	mn_now = rt_now;	1908	time_update (EV_A_ 1e100);
1153	}
1154		1909
1155	if (flags & EVLOOP_NONBLOCK || idlecnt)
1156	block = 0.;
1157	else
1158	{
1159	block = MAX_BLOCKTIME;	1910	waittime = MAX_BLOCKTIME;
1160		1911
1161	if (timercnt)	1912	if (timercnt)
1162	{	1913	{
1163	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;	1914	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1164	if (block > to) block = to;	1915	if (waittime > to) waittime = to;
1165	}	1916	}
1166		1917
		1918	#if EV_PERIODIC_ENABLE
1167	if (periodiccnt)	1919	if (periodiccnt)
1168	{	1920	{
1169	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;	1921	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1170	if (block > to) block = to;	1922	if (waittime > to) waittime = to;
1171	}	1923	}
		1924	#endif
1172		1925
1173	if (block < 0.) block = 0.;	1926	if (expect_false (waittime < timeout_blocktime))
		1927	waittime = timeout_blocktime;
		1928
		1929	sleeptime = waittime - backend_fudge;
		1930
		1931	if (expect_true (sleeptime > io_blocktime))
		1932	sleeptime = io_blocktime;
		1933
		1934	if (sleeptime)
		1935	{
		1936	ev_sleep (sleeptime);
		1937	waittime -= sleeptime;
		1938	}
1174	}	1939	}
1175		1940
1176	method_poll (EV_A_ block);	1941	++loop_count;
		1942	backend_poll (EV_A_ waittime);
1177		1943
1178	/* update rt_now, do magic */	1944	/* update ev_rt_now, do magic */
1179	time_update (EV_A);	1945	time_update (EV_A_ waittime + sleeptime);
		1946	}
1180		1947
1181	/* queue pending timers and reschedule them */	1948	/* queue pending timers and reschedule them */
1182	timers_reify (EV_A); /* relative timers called last */	1949	timers_reify (EV_A); /* relative timers called last */
		1950	#if EV_PERIODIC_ENABLE
1183	periodics_reify (EV_A); /* absolute timers called first */	1951	periodics_reify (EV_A); /* absolute timers called first */
		1952	#endif
1184		1953
		1954	#if EV_IDLE_ENABLE
1185	/* queue idle watchers unless io or timers are pending */	1955	/* queue idle watchers unless other events are pending */
1186	if (!pendingcnt)	1956	idle_reify (EV_A);
1187	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	1957	#endif
1188		1958
1189	/* queue check watchers, to be executed first */	1959	/* queue check watchers, to be executed first */
1190	if (checkcnt)	1960	if (expect_false (checkcnt))
1191	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1961	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1192		1962
1193	call_pending (EV_A);	1963	call_pending (EV_A);
1194	}	1964	}
1195	while (activecnt && !loop_done);	1965	while (expect_true (
		1966	activecnt
		1967	&& !loop_done
		1968	&& !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
		1969	));
1196		1970
1197	if (loop_done != 2)	1971	if (loop_done == EVUNLOOP_ONE)
1198	loop_done = 0;	1972	loop_done = EVUNLOOP_CANCEL;
1199	}	1973	}
1200		1974
1201	void	1975	void
1202	ev_unloop (EV_P_ int how)	1976	ev_unloop (EV_P_ int how)
1203	{	1977	{
1204	loop_done = how;	1978	loop_done = how;
1205	}	1979	}
1206		1980
1207	/*****************************************************************************/	1981	/*****************************************************************************/
1208		1982
1209	inline void	1983	void inline_size
1210	wlist_add (WL *head, WL elem)	1984	wlist_add (WL *head, WL elem)
1211	{	1985	{
1212	elem->next = *head;	1986	elem->next = *head;
1213	*head = elem;	1987	*head = elem;
1214	}	1988	}
1215		1989
1216	inline void	1990	void inline_size
1217	wlist_del (WL *head, WL elem)	1991	wlist_del (WL *head, WL elem)
1218	{	1992	{
1219	while (*head)	1993	while (*head)
1220	{	1994	{
1221	if (*head == elem)	1995	if (*head == elem)
…		…
1226		2000
1227	head = &(*head)->next;	2001	head = &(*head)->next;
1228	}	2002	}
1229	}	2003	}
1230		2004
1231	inline void	2005	void inline_speed
1232	ev_clear_pending (EV_P_ W w)	2006	clear_pending (EV_P_ W w)
1233	{	2007	{
1234	if (w->pending)	2008	if (w->pending)
1235	{	2009	{
1236	pendings [ABSPRI (w)][w->pending - 1].w = 0;	2010	pendings [ABSPRI (w)][w->pending - 1].w = 0;
1237	w->pending = 0;	2011	w->pending = 0;
1238	}	2012	}
1239	}	2013	}
1240		2014
1241	inline void	2015	int
		2016	ev_clear_pending (EV_P_ void *w)
		2017	{
		2018	W w_ = (W)w;
		2019	int pending = w_->pending;
		2020
		2021	if (expect_true (pending))
		2022	{
		2023	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		2024	w_->pending = 0;
		2025	p->w = 0;
		2026	return p->events;
		2027	}
		2028	else
		2029	return 0;
		2030	}
		2031
		2032	void inline_size
		2033	pri_adjust (EV_P_ W w)
		2034	{
		2035	int pri = w->priority;
		2036	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		2037	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		2038	w->priority = pri;
		2039	}
		2040
		2041	void inline_speed
1242	ev_start (EV_P_ W w, int active)	2042	ev_start (EV_P_ W w, int active)
1243	{	2043	{
1244	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	2044	pri_adjust (EV_A_ w);
1245	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1246
1247	w->active = active;	2045	w->active = active;
1248	ev_ref (EV_A);	2046	ev_ref (EV_A);
1249	}	2047	}
1250		2048
1251	inline void	2049	void inline_size
1252	ev_stop (EV_P_ W w)	2050	ev_stop (EV_P_ W w)
1253	{	2051	{
1254	ev_unref (EV_A);	2052	ev_unref (EV_A);
1255	w->active = 0;	2053	w->active = 0;
1256	}	2054	}
1257		2055
1258	/*****************************************************************************/	2056	/*****************************************************************************/
1259		2057
1260	void	2058	void noinline
1261	ev_io_start (EV_P_ struct ev_io *w)	2059	ev_io_start (EV_P_ ev_io *w)
1262	{	2060	{
1263	int fd = w->fd;	2061	int fd = w->fd;
1264		2062
1265	if (ev_is_active (w))	2063	if (expect_false (ev_is_active (w)))
1266	return;	2064	return;
1267		2065
1268	assert (("ev_io_start called with negative fd", fd >= 0));	2066	assert (("ev_io_start called with negative fd", fd >= 0));
1269		2067
		2068	EV_FREQUENT_CHECK;
		2069
1270	ev_start (EV_A_ (W)w, 1);	2070	ev_start (EV_A_ (W)w, 1);
1271	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	2071	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1272	wlist_add ((WL *)&anfds[fd].head, (WL)w);	2072	wlist_add (&anfds[fd].head, (WL)w);
1273		2073
1274	fd_change (EV_A_ fd);	2074	fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1275	}	2075	w->events &= ~EV_IOFDSET;
1276		2076
1277	void	2077	EV_FREQUENT_CHECK;
		2078	}
		2079
		2080	void noinline
1278	ev_io_stop (EV_P_ struct ev_io *w)	2081	ev_io_stop (EV_P_ ev_io *w)
1279	{	2082	{
1280	ev_clear_pending (EV_A_ (W)w);	2083	clear_pending (EV_A_ (W)w);
1281	if (!ev_is_active (w))	2084	if (expect_false (!ev_is_active (w)))
1282	return;	2085	return;
1283		2086
		2087	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
		2088
		2089	EV_FREQUENT_CHECK;
		2090
1284	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	2091	wlist_del (&anfds[w->fd].head, (WL)w);
1285	ev_stop (EV_A_ (W)w);	2092	ev_stop (EV_A_ (W)w);
1286		2093
1287	fd_change (EV_A_ w->fd);	2094	fd_change (EV_A_ w->fd, 1);
1288	}
1289		2095
1290	void	2096	EV_FREQUENT_CHECK;
		2097	}
		2098
		2099	void noinline
1291	ev_timer_start (EV_P_ struct ev_timer *w)	2100	ev_timer_start (EV_P_ ev_timer *w)
1292	{	2101	{
1293	if (ev_is_active (w))	2102	if (expect_false (ev_is_active (w)))
1294	return;	2103	return;
1295		2104
1296	((WT)w)->at += mn_now;	2105	ev_at (w) += mn_now;
1297		2106
1298	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2107	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1299		2108
		2109	EV_FREQUENT_CHECK;
		2110
		2111	++timercnt;
1300	ev_start (EV_A_ (W)w, ++timercnt);	2112	ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1301	array_needsize (timers, timermax, timercnt, (void));	2113	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1302	timers [timercnt - 1] = w;	2114	ANHE_w (timers [ev_active (w)]) = (WT)w;
1303	upheap ((WT *)timers, timercnt - 1);	2115	ANHE_at_cache (timers [ev_active (w)]);
		2116	upheap (timers, ev_active (w));
1304		2117
		2118	EV_FREQUENT_CHECK;
		2119
1305	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2120	/*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1306	}	2121	}
1307		2122
1308	void	2123	void noinline
1309	ev_timer_stop (EV_P_ struct ev_timer *w)	2124	ev_timer_stop (EV_P_ ev_timer *w)
1310	{	2125	{
1311	ev_clear_pending (EV_A_ (W)w);	2126	clear_pending (EV_A_ (W)w);
1312	if (!ev_is_active (w))	2127	if (expect_false (!ev_is_active (w)))
1313	return;	2128	return;
1314		2129
		2130	EV_FREQUENT_CHECK;
		2131
		2132	{
		2133	int active = ev_active (w);
		2134
1315	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	2135	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1316		2136
1317	if (((W)w)->active < timercnt--)	2137	--timercnt;
		2138
		2139	if (expect_true (active < timercnt + HEAP0))
1318	{	2140	{
1319	timers [((W)w)->active - 1] = timers [timercnt];	2141	timers [active] = timers [timercnt + HEAP0];
1320	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2142	adjustheap (timers, timercnt, active);
1321	}	2143	}
		2144	}
1322		2145
1323	((WT)w)->at = w->repeat;	2146	EV_FREQUENT_CHECK;
		2147
		2148	ev_at (w) -= mn_now;
1324		2149
1325	ev_stop (EV_A_ (W)w);	2150	ev_stop (EV_A_ (W)w);
1326	}	2151	}
1327		2152
1328	void	2153	void noinline
1329	ev_timer_again (EV_P_ struct ev_timer *w)	2154	ev_timer_again (EV_P_ ev_timer *w)
1330	{	2155	{
		2156	EV_FREQUENT_CHECK;
		2157
1331	if (ev_is_active (w))	2158	if (ev_is_active (w))
1332	{	2159	{
1333	if (w->repeat)	2160	if (w->repeat)
1334	{	2161	{
1335	((WT)w)->at = mn_now + w->repeat;	2162	ev_at (w) = mn_now + w->repeat;
1336	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2163	ANHE_at_cache (timers [ev_active (w)]);
		2164	adjustheap (timers, timercnt, ev_active (w));
1337	}	2165	}
1338	else	2166	else
1339	ev_timer_stop (EV_A_ w);	2167	ev_timer_stop (EV_A_ w);
1340	}	2168	}
1341	else if (w->repeat)	2169	else if (w->repeat)
		2170	{
		2171	ev_at (w) = w->repeat;
1342	ev_timer_start (EV_A_ w);	2172	ev_timer_start (EV_A_ w);
1343	}	2173	}
1344		2174
1345	void	2175	EV_FREQUENT_CHECK;
		2176	}
		2177
		2178	#if EV_PERIODIC_ENABLE
		2179	void noinline
1346	ev_periodic_start (EV_P_ struct ev_periodic *w)	2180	ev_periodic_start (EV_P_ ev_periodic *w)
1347	{	2181	{
1348	if (ev_is_active (w))	2182	if (expect_false (ev_is_active (w)))
1349	return;	2183	return;
1350		2184
		2185	if (w->reschedule_cb)
		2186	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		2187	else if (w->interval)
		2188	{
1351	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2189	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1352
1353	/* this formula differs from the one in periodic_reify because we do not always round up */	2190	/* this formula differs from the one in periodic_reify because we do not always round up */
1354	if (w->interval)
1355	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;	2191	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		2192	}
		2193	else
		2194	ev_at (w) = w->offset;
1356		2195
		2196	EV_FREQUENT_CHECK;
		2197
		2198	++periodiccnt;
1357	ev_start (EV_A_ (W)w, ++periodiccnt);	2199	ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1358	array_needsize (periodics, periodicmax, periodiccnt, (void));	2200	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1359	periodics [periodiccnt - 1] = w;	2201	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1360	upheap ((WT *)periodics, periodiccnt - 1);	2202	ANHE_at_cache (periodics [ev_active (w)]);
		2203	upheap (periodics, ev_active (w));
1361		2204
		2205	EV_FREQUENT_CHECK;
		2206
1362	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2207	/*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1363	}	2208	}
1364		2209
1365	void	2210	void noinline
1366	ev_periodic_stop (EV_P_ struct ev_periodic *w)	2211	ev_periodic_stop (EV_P_ ev_periodic *w)
1367	{	2212	{
1368	ev_clear_pending (EV_A_ (W)w);	2213	clear_pending (EV_A_ (W)w);
1369	if (!ev_is_active (w))	2214	if (expect_false (!ev_is_active (w)))
1370	return;	2215	return;
1371		2216
		2217	EV_FREQUENT_CHECK;
		2218
		2219	{
		2220	int active = ev_active (w);
		2221
1372	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	2222	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1373		2223
1374	if (((W)w)->active < periodiccnt--)	2224	--periodiccnt;
		2225
		2226	if (expect_true (active < periodiccnt + HEAP0))
1375	{	2227	{
1376	periodics [((W)w)->active - 1] = periodics [periodiccnt];	2228	periodics [active] = periodics [periodiccnt + HEAP0];
1377	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	2229	adjustheap (periodics, periodiccnt, active);
1378	}	2230	}
		2231	}
		2232
		2233	EV_FREQUENT_CHECK;
1379		2234
1380	ev_stop (EV_A_ (W)w);	2235	ev_stop (EV_A_ (W)w);
1381	}	2236	}
1382		2237
1383	void	2238	void noinline
1384	ev_idle_start (EV_P_ struct ev_idle *w)	2239	ev_periodic_again (EV_P_ ev_periodic *w)
1385	{	2240	{
1386	if (ev_is_active (w))	2241	/* TODO: use adjustheap and recalculation */
1387	return;
1388
1389	ev_start (EV_A_ (W)w, ++idlecnt);
1390	array_needsize (idles, idlemax, idlecnt, (void));
1391	idles [idlecnt - 1] = w;
1392	}
1393
1394	void
1395	ev_idle_stop (EV_P_ struct ev_idle *w)
1396	{
1397	ev_clear_pending (EV_A_ (W)w);
1398	if (ev_is_active (w))
1399	return;
1400
1401	idles [((W)w)->active - 1] = idles [--idlecnt];
1402	ev_stop (EV_A_ (W)w);	2242	ev_periodic_stop (EV_A_ w);
		2243	ev_periodic_start (EV_A_ w);
1403	}	2244	}
1404		2245	#endif
1405	void
1406	ev_prepare_start (EV_P_ struct ev_prepare *w)
1407	{
1408	if (ev_is_active (w))
1409	return;
1410
1411	ev_start (EV_A_ (W)w, ++preparecnt);
1412	array_needsize (prepares, preparemax, preparecnt, (void));
1413	prepares [preparecnt - 1] = w;
1414	}
1415
1416	void
1417	ev_prepare_stop (EV_P_ struct ev_prepare *w)
1418	{
1419	ev_clear_pending (EV_A_ (W)w);
1420	if (ev_is_active (w))
1421	return;
1422
1423	prepares [((W)w)->active - 1] = prepares [--preparecnt];
1424	ev_stop (EV_A_ (W)w);
1425	}
1426
1427	void
1428	ev_check_start (EV_P_ struct ev_check *w)
1429	{
1430	if (ev_is_active (w))
1431	return;
1432
1433	ev_start (EV_A_ (W)w, ++checkcnt);
1434	array_needsize (checks, checkmax, checkcnt, (void));
1435	checks [checkcnt - 1] = w;
1436	}
1437
1438	void
1439	ev_check_stop (EV_P_ struct ev_check *w)
1440	{
1441	ev_clear_pending (EV_A_ (W)w);
1442	if (ev_is_active (w))
1443	return;
1444
1445	checks [((W)w)->active - 1] = checks [--checkcnt];
1446	ev_stop (EV_A_ (W)w);
1447	}
1448		2246
1449	#ifndef SA_RESTART	2247	#ifndef SA_RESTART
1450	# define SA_RESTART 0	2248	# define SA_RESTART 0
1451	#endif	2249	#endif
1452		2250
1453	void	2251	void noinline
1454	ev_signal_start (EV_P_ struct ev_signal *w)	2252	ev_signal_start (EV_P_ ev_signal *w)
1455	{	2253	{
1456	#if EV_MULTIPLICITY	2254	#if EV_MULTIPLICITY
1457	assert (("signal watchers are only supported in the default loop", loop == default_loop));	2255	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1458	#endif	2256	#endif
1459	if (ev_is_active (w))	2257	if (expect_false (ev_is_active (w)))
1460	return;	2258	return;
1461		2259
1462	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2260	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1463		2261
		2262	evpipe_init (EV_A);
		2263
		2264	EV_FREQUENT_CHECK;
		2265
		2266	{
		2267	#ifndef _WIN32
		2268	sigset_t full, prev;
		2269	sigfillset (&full);
		2270	sigprocmask (SIG_SETMASK, &full, &prev);
		2271	#endif
		2272
		2273	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2274
		2275	#ifndef _WIN32
		2276	sigprocmask (SIG_SETMASK, &prev, 0);
		2277	#endif
		2278	}
		2279
1464	ev_start (EV_A_ (W)w, 1);	2280	ev_start (EV_A_ (W)w, 1);
1465	array_needsize (signals, signalmax, w->signum, signals_init);
1466	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2281	wlist_add (&signals [w->signum - 1].head, (WL)w);
1467		2282
1468	if (!((WL)w)->next)	2283	if (!((WL)w)->next)
1469	{	2284	{
1470	#if WIN32	2285	#if _WIN32
1471	signal (w->signum, sighandler);	2286	signal (w->signum, ev_sighandler);
1472	#else	2287	#else
1473	struct sigaction sa;	2288	struct sigaction sa;
1474	sa.sa_handler = sighandler;	2289	sa.sa_handler = ev_sighandler;
1475	sigfillset (&sa.sa_mask);	2290	sigfillset (&sa.sa_mask);
1476	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2291	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1477	sigaction (w->signum, &sa, 0);	2292	sigaction (w->signum, &sa, 0);
1478	#endif	2293	#endif
1479	}	2294	}
1480	}
1481		2295
1482	void	2296	EV_FREQUENT_CHECK;
		2297	}
		2298
		2299	void noinline
1483	ev_signal_stop (EV_P_ struct ev_signal *w)	2300	ev_signal_stop (EV_P_ ev_signal *w)
1484	{	2301	{
1485	ev_clear_pending (EV_A_ (W)w);	2302	clear_pending (EV_A_ (W)w);
1486	if (!ev_is_active (w))	2303	if (expect_false (!ev_is_active (w)))
1487	return;	2304	return;
1488		2305
		2306	EV_FREQUENT_CHECK;
		2307
1489	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2308	wlist_del (&signals [w->signum - 1].head, (WL)w);
1490	ev_stop (EV_A_ (W)w);	2309	ev_stop (EV_A_ (W)w);
1491		2310
1492	if (!signals [w->signum - 1].head)	2311	if (!signals [w->signum - 1].head)
1493	signal (w->signum, SIG_DFL);	2312	signal (w->signum, SIG_DFL);
1494	}
1495		2313
		2314	EV_FREQUENT_CHECK;
		2315	}
		2316
1496	void	2317	void
1497	ev_child_start (EV_P_ struct ev_child *w)	2318	ev_child_start (EV_P_ ev_child *w)
1498	{	2319	{
1499	#if EV_MULTIPLICITY	2320	#if EV_MULTIPLICITY
1500	assert (("child watchers are only supported in the default loop", loop == default_loop));	2321	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1501	#endif	2322	#endif
1502	if (ev_is_active (w))	2323	if (expect_false (ev_is_active (w)))
1503	return;	2324	return;
1504		2325
		2326	EV_FREQUENT_CHECK;
		2327
1505	ev_start (EV_A_ (W)w, 1);	2328	ev_start (EV_A_ (W)w, 1);
1506	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2329	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1507	}
1508		2330
		2331	EV_FREQUENT_CHECK;
		2332	}
		2333
1509	void	2334	void
1510	ev_child_stop (EV_P_ struct ev_child *w)	2335	ev_child_stop (EV_P_ ev_child *w)
1511	{	2336	{
1512	ev_clear_pending (EV_A_ (W)w);	2337	clear_pending (EV_A_ (W)w);
1513	if (ev_is_active (w))	2338	if (expect_false (!ev_is_active (w)))
1514	return;	2339	return;
1515		2340
		2341	EV_FREQUENT_CHECK;
		2342
1516	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2343	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1517	ev_stop (EV_A_ (W)w);	2344	ev_stop (EV_A_ (W)w);
		2345
		2346	EV_FREQUENT_CHECK;
1518	}	2347	}
		2348
		2349	#if EV_STAT_ENABLE
		2350
		2351	# ifdef _WIN32
		2352	# undef lstat
		2353	# define lstat(a,b) _stati64 (a,b)
		2354	# endif
		2355
		2356	#define DEF_STAT_INTERVAL 5.0074891
		2357	#define MIN_STAT_INTERVAL 0.1074891
		2358
		2359	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		2360
		2361	#if EV_USE_INOTIFY
		2362	# define EV_INOTIFY_BUFSIZE 8192
		2363
		2364	static void noinline
		2365	infy_add (EV_P_ ev_stat *w)
		2366	{
		2367	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);
		2368
		2369	if (w->wd < 0)
		2370	{
		2371	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		2372
		2373	/* monitor some parent directory for speedup hints */
		2374	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2375	/* but an efficiency issue only */
		2376	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		2377	{
		2378	char path [4096];
		2379	strcpy (path, w->path);
		2380
		2381	do
		2382	{
		2383	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		2384	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		2385
		2386	char *pend = strrchr (path, '/');
		2387
		2388	if (!pend)
		2389	break; /* whoops, no '/', complain to your admin */
		2390
		2391	*pend = 0;
		2392	w->wd = inotify_add_watch (fs_fd, path, mask);
		2393	}
		2394	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		2395	}
		2396	}
		2397	else
		2398	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		2399
		2400	if (w->wd >= 0)
		2401	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		2402	}
		2403
		2404	static void noinline
		2405	infy_del (EV_P_ ev_stat *w)
		2406	{
		2407	int slot;
		2408	int wd = w->wd;
		2409
		2410	if (wd < 0)
		2411	return;
		2412
		2413	w->wd = -2;
		2414	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		2415	wlist_del (&fs_hash [slot].head, (WL)w);
		2416
		2417	/* remove this watcher, if others are watching it, they will rearm */
		2418	inotify_rm_watch (fs_fd, wd);
		2419	}
		2420
		2421	static void noinline
		2422	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		2423	{
		2424	if (slot < 0)
		2425	/* overflow, need to check for all hahs slots */
		2426	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2427	infy_wd (EV_A_ slot, wd, ev);
		2428	else
		2429	{
		2430	WL w_;
		2431
		2432	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		2433	{
		2434	ev_stat *w = (ev_stat *)w_;
		2435	w_ = w_->next; /* lets us remove this watcher and all before it */
		2436
		2437	if (w->wd == wd || wd == -1)
		2438	{
		2439	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		2440	{
		2441	w->wd = -1;
		2442	infy_add (EV_A_ w); /* re-add, no matter what */
		2443	}
		2444
		2445	stat_timer_cb (EV_A_ &w->timer, 0);
		2446	}
		2447	}
		2448	}
		2449	}
		2450
		2451	static void
		2452	infy_cb (EV_P_ ev_io *w, int revents)
		2453	{
		2454	char buf [EV_INOTIFY_BUFSIZE];
		2455	struct inotify_event *ev = (struct inotify_event *)buf;
		2456	int ofs;
		2457	int len = read (fs_fd, buf, sizeof (buf));
		2458
		2459	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		2460	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		2461	}
		2462
		2463	void inline_size
		2464	infy_init (EV_P)
		2465	{
		2466	if (fs_fd != -2)
		2467	return;
		2468
		2469	fs_fd = inotify_init ();
		2470
		2471	if (fs_fd >= 0)
		2472	{
		2473	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		2474	ev_set_priority (&fs_w, EV_MAXPRI);
		2475	ev_io_start (EV_A_ &fs_w);
		2476	}
		2477	}
		2478
		2479	void inline_size
		2480	infy_fork (EV_P)
		2481	{
		2482	int slot;
		2483
		2484	if (fs_fd < 0)
		2485	return;
		2486
		2487	close (fs_fd);
		2488	fs_fd = inotify_init ();
		2489
		2490	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		2491	{
		2492	WL w_ = fs_hash [slot].head;
		2493	fs_hash [slot].head = 0;
		2494
		2495	while (w_)
		2496	{
		2497	ev_stat *w = (ev_stat *)w_;
		2498	w_ = w_->next; /* lets us add this watcher */
		2499
		2500	w->wd = -1;
		2501
		2502	if (fs_fd >= 0)
		2503	infy_add (EV_A_ w); /* re-add, no matter what */
		2504	else
		2505	ev_timer_start (EV_A_ &w->timer);
		2506	}
		2507
		2508	}
		2509	}
		2510
		2511	#endif
		2512
		2513	void
		2514	ev_stat_stat (EV_P_ ev_stat *w)
		2515	{
		2516	if (lstat (w->path, &w->attr) < 0)
		2517	w->attr.st_nlink = 0;
		2518	else if (!w->attr.st_nlink)
		2519	w->attr.st_nlink = 1;
		2520	}
		2521
		2522	static void noinline
		2523	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		2524	{
		2525	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2526
		2527	/* we copy this here each the time so that */
		2528	/* prev has the old value when the callback gets invoked */
		2529	w->prev = w->attr;
		2530	ev_stat_stat (EV_A_ w);
		2531
		2532	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2533	if (
		2534	w->prev.st_dev != w->attr.st_dev
		2535	|| w->prev.st_ino != w->attr.st_ino
		2536	|| w->prev.st_mode != w->attr.st_mode
		2537	|| w->prev.st_nlink != w->attr.st_nlink
		2538	|| w->prev.st_uid != w->attr.st_uid
		2539	|| w->prev.st_gid != w->attr.st_gid
		2540	|| w->prev.st_rdev != w->attr.st_rdev
		2541	|| w->prev.st_size != w->attr.st_size
		2542	|| w->prev.st_atime != w->attr.st_atime
		2543	|| w->prev.st_mtime != w->attr.st_mtime
		2544	|| w->prev.st_ctime != w->attr.st_ctime
		2545	) {
		2546	#if EV_USE_INOTIFY
		2547	infy_del (EV_A_ w);
		2548	infy_add (EV_A_ w);
		2549	ev_stat_stat (EV_A_ w); /* avoid race... */
		2550	#endif
		2551
		2552	ev_feed_event (EV_A_ w, EV_STAT);
		2553	}
		2554	}
		2555
		2556	void
		2557	ev_stat_start (EV_P_ ev_stat *w)
		2558	{
		2559	if (expect_false (ev_is_active (w)))
		2560	return;
		2561
		2562	/* since we use memcmp, we need to clear any padding data etc. */
		2563	memset (&w->prev, 0, sizeof (ev_statdata));
		2564	memset (&w->attr, 0, sizeof (ev_statdata));
		2565
		2566	ev_stat_stat (EV_A_ w);
		2567
		2568	if (w->interval < MIN_STAT_INTERVAL)
		2569	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2570
		2571	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2572	ev_set_priority (&w->timer, ev_priority (w));
		2573
		2574	#if EV_USE_INOTIFY
		2575	infy_init (EV_A);
		2576
		2577	if (fs_fd >= 0)
		2578	infy_add (EV_A_ w);
		2579	else
		2580	#endif
		2581	ev_timer_start (EV_A_ &w->timer);
		2582
		2583	ev_start (EV_A_ (W)w, 1);
		2584
		2585	EV_FREQUENT_CHECK;
		2586	}
		2587
		2588	void
		2589	ev_stat_stop (EV_P_ ev_stat *w)
		2590	{
		2591	clear_pending (EV_A_ (W)w);
		2592	if (expect_false (!ev_is_active (w)))
		2593	return;
		2594
		2595	EV_FREQUENT_CHECK;
		2596
		2597	#if EV_USE_INOTIFY
		2598	infy_del (EV_A_ w);
		2599	#endif
		2600	ev_timer_stop (EV_A_ &w->timer);
		2601
		2602	ev_stop (EV_A_ (W)w);
		2603
		2604	EV_FREQUENT_CHECK;
		2605	}
		2606	#endif
		2607
		2608	#if EV_IDLE_ENABLE
		2609	void
		2610	ev_idle_start (EV_P_ ev_idle *w)
		2611	{
		2612	if (expect_false (ev_is_active (w)))
		2613	return;
		2614
		2615	pri_adjust (EV_A_ (W)w);
		2616
		2617	EV_FREQUENT_CHECK;
		2618
		2619	{
		2620	int active = ++idlecnt [ABSPRI (w)];
		2621
		2622	++idleall;
		2623	ev_start (EV_A_ (W)w, active);
		2624
		2625	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2626	idles [ABSPRI (w)][active - 1] = w;
		2627	}
		2628
		2629	EV_FREQUENT_CHECK;
		2630	}
		2631
		2632	void
		2633	ev_idle_stop (EV_P_ ev_idle *w)
		2634	{
		2635	clear_pending (EV_A_ (W)w);
		2636	if (expect_false (!ev_is_active (w)))
		2637	return;
		2638
		2639	EV_FREQUENT_CHECK;
		2640
		2641	{
		2642	int active = ev_active (w);
		2643
		2644	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2645	ev_active (idles [ABSPRI (w)][active - 1]) = active;
		2646
		2647	ev_stop (EV_A_ (W)w);
		2648	--idleall;
		2649	}
		2650
		2651	EV_FREQUENT_CHECK;
		2652	}
		2653	#endif
		2654
		2655	void
		2656	ev_prepare_start (EV_P_ ev_prepare *w)
		2657	{
		2658	if (expect_false (ev_is_active (w)))
		2659	return;
		2660
		2661	EV_FREQUENT_CHECK;
		2662
		2663	ev_start (EV_A_ (W)w, ++preparecnt);
		2664	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2665	prepares [preparecnt - 1] = w;
		2666
		2667	EV_FREQUENT_CHECK;
		2668	}
		2669
		2670	void
		2671	ev_prepare_stop (EV_P_ ev_prepare *w)
		2672	{
		2673	clear_pending (EV_A_ (W)w);
		2674	if (expect_false (!ev_is_active (w)))
		2675	return;
		2676
		2677	EV_FREQUENT_CHECK;
		2678
		2679	{
		2680	int active = ev_active (w);
		2681
		2682	prepares [active - 1] = prepares [--preparecnt];
		2683	ev_active (prepares [active - 1]) = active;
		2684	}
		2685
		2686	ev_stop (EV_A_ (W)w);
		2687
		2688	EV_FREQUENT_CHECK;
		2689	}
		2690
		2691	void
		2692	ev_check_start (EV_P_ ev_check *w)
		2693	{
		2694	if (expect_false (ev_is_active (w)))
		2695	return;
		2696
		2697	EV_FREQUENT_CHECK;
		2698
		2699	ev_start (EV_A_ (W)w, ++checkcnt);
		2700	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2701	checks [checkcnt - 1] = w;
		2702
		2703	EV_FREQUENT_CHECK;
		2704	}
		2705
		2706	void
		2707	ev_check_stop (EV_P_ ev_check *w)
		2708	{
		2709	clear_pending (EV_A_ (W)w);
		2710	if (expect_false (!ev_is_active (w)))
		2711	return;
		2712
		2713	EV_FREQUENT_CHECK;
		2714
		2715	{
		2716	int active = ev_active (w);
		2717
		2718	checks [active - 1] = checks [--checkcnt];
		2719	ev_active (checks [active - 1]) = active;
		2720	}
		2721
		2722	ev_stop (EV_A_ (W)w);
		2723
		2724	EV_FREQUENT_CHECK;
		2725	}
		2726
		2727	#if EV_EMBED_ENABLE
		2728	void noinline
		2729	ev_embed_sweep (EV_P_ ev_embed *w)
		2730	{
		2731	ev_loop (w->other, EVLOOP_NONBLOCK);
		2732	}
		2733
		2734	static void
		2735	embed_io_cb (EV_P_ ev_io *io, int revents)
		2736	{
		2737	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2738
		2739	if (ev_cb (w))
		2740	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2741	else
		2742	ev_loop (w->other, EVLOOP_NONBLOCK);
		2743	}
		2744
		2745	static void
		2746	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2747	{
		2748	ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
		2749
		2750	{
		2751	struct ev_loop *loop = w->other;
		2752
		2753	while (fdchangecnt)
		2754	{
		2755	fd_reify (EV_A);
		2756	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2757	}
		2758	}
		2759	}
		2760
		2761	#if 0
		2762	static void
		2763	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2764	{
		2765	ev_idle_stop (EV_A_ idle);
		2766	}
		2767	#endif
		2768
		2769	void
		2770	ev_embed_start (EV_P_ ev_embed *w)
		2771	{
		2772	if (expect_false (ev_is_active (w)))
		2773	return;
		2774
		2775	{
		2776	struct ev_loop *loop = w->other;
		2777	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2778	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
		2779	}
		2780
		2781	EV_FREQUENT_CHECK;
		2782
		2783	ev_set_priority (&w->io, ev_priority (w));
		2784	ev_io_start (EV_A_ &w->io);
		2785
		2786	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2787	ev_set_priority (&w->prepare, EV_MINPRI);
		2788	ev_prepare_start (EV_A_ &w->prepare);
		2789
		2790	/*ev_idle_init (&w->idle, e,bed_idle_cb);*/
		2791
		2792	ev_start (EV_A_ (W)w, 1);
		2793
		2794	EV_FREQUENT_CHECK;
		2795	}
		2796
		2797	void
		2798	ev_embed_stop (EV_P_ ev_embed *w)
		2799	{
		2800	clear_pending (EV_A_ (W)w);
		2801	if (expect_false (!ev_is_active (w)))
		2802	return;
		2803
		2804	EV_FREQUENT_CHECK;
		2805
		2806	ev_io_stop (EV_A_ &w->io);
		2807	ev_prepare_stop (EV_A_ &w->prepare);
		2808
		2809	ev_stop (EV_A_ (W)w);
		2810
		2811	EV_FREQUENT_CHECK;
		2812	}
		2813	#endif
		2814
		2815	#if EV_FORK_ENABLE
		2816	void
		2817	ev_fork_start (EV_P_ ev_fork *w)
		2818	{
		2819	if (expect_false (ev_is_active (w)))
		2820	return;
		2821
		2822	EV_FREQUENT_CHECK;
		2823
		2824	ev_start (EV_A_ (W)w, ++forkcnt);
		2825	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2826	forks [forkcnt - 1] = w;
		2827
		2828	EV_FREQUENT_CHECK;
		2829	}
		2830
		2831	void
		2832	ev_fork_stop (EV_P_ ev_fork *w)
		2833	{
		2834	clear_pending (EV_A_ (W)w);
		2835	if (expect_false (!ev_is_active (w)))
		2836	return;
		2837
		2838	EV_FREQUENT_CHECK;
		2839
		2840	{
		2841	int active = ev_active (w);
		2842
		2843	forks [active - 1] = forks [--forkcnt];
		2844	ev_active (forks [active - 1]) = active;
		2845	}
		2846
		2847	ev_stop (EV_A_ (W)w);
		2848
		2849	EV_FREQUENT_CHECK;
		2850	}
		2851	#endif
		2852
		2853	#if EV_ASYNC_ENABLE
		2854	void
		2855	ev_async_start (EV_P_ ev_async *w)
		2856	{
		2857	if (expect_false (ev_is_active (w)))
		2858	return;
		2859
		2860	evpipe_init (EV_A);
		2861
		2862	EV_FREQUENT_CHECK;
		2863
		2864	ev_start (EV_A_ (W)w, ++asynccnt);
		2865	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2866	asyncs [asynccnt - 1] = w;
		2867
		2868	EV_FREQUENT_CHECK;
		2869	}
		2870
		2871	void
		2872	ev_async_stop (EV_P_ ev_async *w)
		2873	{
		2874	clear_pending (EV_A_ (W)w);
		2875	if (expect_false (!ev_is_active (w)))
		2876	return;
		2877
		2878	EV_FREQUENT_CHECK;
		2879
		2880	{
		2881	int active = ev_active (w);
		2882
		2883	asyncs [active - 1] = asyncs [--asynccnt];
		2884	ev_active (asyncs [active - 1]) = active;
		2885	}
		2886
		2887	ev_stop (EV_A_ (W)w);
		2888
		2889	EV_FREQUENT_CHECK;
		2890	}
		2891
		2892	void
		2893	ev_async_send (EV_P_ ev_async *w)
		2894	{
		2895	w->sent = 1;
		2896	evpipe_write (EV_A_ &gotasync);
		2897	}
		2898	#endif
1519		2899
1520	/*****************************************************************************/	2900	/*****************************************************************************/
1521		2901
1522	struct ev_once	2902	struct ev_once
1523	{	2903	{
1524	struct ev_io io;	2904	ev_io io;
1525	struct ev_timer to;	2905	ev_timer to;
1526	void (*cb)(int revents, void *arg);	2906	void (*cb)(int revents, void *arg);
1527	void *arg;	2907	void *arg;
1528	};	2908	};
1529		2909
1530	static void	2910	static void
…		…
1539		2919
1540	cb (revents, arg);	2920	cb (revents, arg);
1541	}	2921	}
1542		2922
1543	static void	2923	static void
1544	once_cb_io (EV_P_ struct ev_io *w, int revents)	2924	once_cb_io (EV_P_ ev_io *w, int revents)
1545	{	2925	{
1546	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2926	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1547	}	2927	}
1548		2928
1549	static void	2929	static void
1550	once_cb_to (EV_P_ struct ev_timer *w, int revents)	2930	once_cb_to (EV_P_ ev_timer *w, int revents)
1551	{	2931	{
1552	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2932	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1553	}	2933	}
1554		2934
1555	void	2935	void
1556	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2936	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1557	{	2937	{
1558	struct ev_once *once = ev_malloc (sizeof (struct ev_once));	2938	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1559		2939
1560	if (!once)	2940	if (expect_false (!once))
		2941	{
1561	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	2942	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1562	else	2943	return;
1563	{	2944	}
		2945
1564	once->cb = cb;	2946	once->cb = cb;
1565	once->arg = arg;	2947	once->arg = arg;
1566		2948
1567	ev_watcher_init (&once->io, once_cb_io);	2949	ev_init (&once->io, once_cb_io);
1568	if (fd >= 0)	2950	if (fd >= 0)
1569	{	2951	{
1570	ev_io_set (&once->io, fd, events);	2952	ev_io_set (&once->io, fd, events);
1571	ev_io_start (EV_A_ &once->io);	2953	ev_io_start (EV_A_ &once->io);
1572	}	2954	}
1573		2955
1574	ev_watcher_init (&once->to, once_cb_to);	2956	ev_init (&once->to, once_cb_to);
1575	if (timeout >= 0.)	2957	if (timeout >= 0.)
1576	{	2958	{
1577	ev_timer_set (&once->to, timeout, 0.);	2959	ev_timer_set (&once->to, timeout, 0.);
1578	ev_timer_start (EV_A_ &once->to);	2960	ev_timer_start (EV_A_ &once->to);
1579	}
1580	}	2961	}
1581	}	2962	}
1582		2963
		2964	#if EV_MULTIPLICITY
		2965	#include "ev_wrap.h"
		2966	#endif
		2967
		2968	#ifdef __cplusplus
		2969	}
		2970	#endif
		2971

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines