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

Comparing libev/ev.c (file contents):
Revision 1.18 by root, Wed Oct 31 16:29:52 2007 UTC vs.
Revision 1.163 by root, Wed Dec 5 13:54:36 2007 UTC

…		…
1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
29		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
		37	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
		40	# include "config.h"
		41	# endif
		42
		43	# if HAVE_CLOCK_GETTIME
		44	# ifndef EV_USE_MONOTONIC
		45	# define EV_USE_MONOTONIC 1
		46	# endif
		47	# ifndef EV_USE_REALTIME
		48	# define EV_USE_REALTIME 1
		49	# endif
		50	# else
		51	# ifndef EV_USE_MONOTONIC
		52	# define EV_USE_MONOTONIC 0
		53	# endif
		54	# ifndef EV_USE_REALTIME
		55	# define EV_USE_REALTIME 0
		56	# endif
		57	# endif
		58
		59	# ifndef EV_USE_SELECT
		60	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		61	# define EV_USE_SELECT 1
		62	# else
		63	# define EV_USE_SELECT 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_POLL
		68	# if HAVE_POLL && HAVE_POLL_H
		69	# define EV_USE_POLL 1
		70	# else
		71	# define EV_USE_POLL 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_EPOLL
		76	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		77	# define EV_USE_EPOLL 1
		78	# else
		79	# define EV_USE_EPOLL 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_KQUEUE
		84	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		85	# define EV_USE_KQUEUE 1
		86	# else
		87	# define EV_USE_KQUEUE 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_PORT
		92	# if HAVE_PORT_H && HAVE_PORT_CREATE
		93	# define EV_USE_PORT 1
		94	# else
		95	# define EV_USE_PORT 0
		96	# endif
		97	# endif
		98
		99	# ifndef EV_USE_INOTIFY
		100	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		101	# define EV_USE_INOTIFY 1
		102	# else
		103	# define EV_USE_INOTIFY 0
		104	# endif
		105	# endif
		106
		107	#endif
		108
30	#include <math.h>	109	#include <math.h>
31	#include <stdlib.h>	110	#include <stdlib.h>
32	#include <unistd.h>
33	#include <fcntl.h>	111	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	112	#include <stddef.h>
36		113
37	#include <stdio.h>	114	#include <stdio.h>
38		115
39	#include <assert.h>	116	#include <assert.h>
40	#include <errno.h>	117	#include <errno.h>
41	#include <sys/time.h>	118	#include <sys/types.h>
42	#include <time.h>	119	#include <time.h>
43		120
44	#define HAVE_EPOLL 1	121	#include <signal.h>
45		122
46	#ifndef HAVE_MONOTONIC	123	#ifdef EV_H
47	# ifdef CLOCK_MONOTONIC	124	# include EV_H
48	# define HAVE_MONOTONIC 1	125	#else
		126	# include "ev.h"
		127	#endif
		128
		129	#ifndef _WIN32
		130	# include <sys/time.h>
		131	# include <sys/wait.h>
		132	# include <unistd.h>
		133	#else
		134	# define WIN32_LEAN_AND_MEAN
		135	# include <windows.h>
		136	# ifndef EV_SELECT_IS_WINSOCKET
		137	# define EV_SELECT_IS_WINSOCKET 1
49	# endif	138	# endif
50	#endif	139	#endif
51		140
		141	/**/
		142
		143	#ifndef EV_USE_MONOTONIC
		144	# define EV_USE_MONOTONIC 0
		145	#endif
		146
		147	#ifndef EV_USE_REALTIME
		148	# define EV_USE_REALTIME 0
		149	#endif
		150
52	#ifndef HAVE_SELECT	151	#ifndef EV_USE_SELECT
53	# define HAVE_SELECT 1	152	# define EV_USE_SELECT 1
		153	#endif
		154
		155	#ifndef EV_USE_POLL
		156	# ifdef _WIN32
		157	# define EV_USE_POLL 0
		158	# else
		159	# define EV_USE_POLL 1
54	#endif	160	# endif
		161	#endif
55		162
56	#ifndef HAVE_EPOLL	163	#ifndef EV_USE_EPOLL
57	# define HAVE_EPOLL 0	164	# define EV_USE_EPOLL 0
		165	#endif
		166
		167	#ifndef EV_USE_KQUEUE
		168	# define EV_USE_KQUEUE 0
		169	#endif
		170
		171	#ifndef EV_USE_PORT
		172	# define EV_USE_PORT 0
		173	#endif
		174
		175	#ifndef EV_USE_INOTIFY
		176	# define EV_USE_INOTIFY 0
		177	#endif
		178
		179	#ifndef EV_PID_HASHSIZE
		180	# if EV_MINIMAL
		181	# define EV_PID_HASHSIZE 1
		182	# else
		183	# define EV_PID_HASHSIZE 16
58	#endif	184	# endif
		185	#endif
59		186
60	#ifndef HAVE_REALTIME	187	#ifndef EV_INOTIFY_HASHSIZE
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	188	# if EV_MINIMAL
		189	# define EV_INOTIFY_HASHSIZE 1
		190	# else
		191	# define EV_INOTIFY_HASHSIZE 16
62	#endif	192	# endif
		193	#endif
		194
		195	/**/
		196
		197	#ifndef CLOCK_MONOTONIC
		198	# undef EV_USE_MONOTONIC
		199	# define EV_USE_MONOTONIC 0
		200	#endif
		201
		202	#ifndef CLOCK_REALTIME
		203	# undef EV_USE_REALTIME
		204	# define EV_USE_REALTIME 0
		205	#endif
		206
		207	#if EV_SELECT_IS_WINSOCKET
		208	# include <winsock.h>
		209	#endif
		210
		211	#if !EV_STAT_ENABLE
		212	# define EV_USE_INOTIFY 0
		213	#endif
		214
		215	#if EV_USE_INOTIFY
		216	# include <sys/inotify.h>
		217	#endif
		218
		219	/**/
63		220
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	221	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	222	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
		223	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds */
66		224
67	#include "ev.h"	225	#if __GNUC__ >= 3
		226	# define expect(expr,value) __builtin_expect ((expr),(value))
		227	# define inline_size static inline /* inline for codesize */
		228	# if EV_MINIMAL
		229	# define noinline __attribute__ ((noinline))
		230	# define inline_speed static noinline
		231	# else
		232	# define noinline
		233	# define inline_speed static inline
		234	# endif
		235	#else
		236	# define expect(expr,value) (expr)
		237	# define inline_speed static
		238	# define inline_size static
		239	# define noinline
		240	#endif
68		241
		242	#define expect_false(expr) expect ((expr) != 0, 0)
		243	#define expect_true(expr) expect ((expr) != 0, 1)
		244
		245	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		246	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		247
		248	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		249	#define EMPTY2(a,b) /* used to suppress some warnings */
		250
69	typedef struct ev_watcher *W;	251	typedef ev_watcher *W;
70	typedef struct ev_watcher_list *WL;	252	typedef ev_watcher_list *WL;
71	typedef struct ev_watcher_time *WT;	253	typedef ev_watcher_time *WT;
72		254
73	static ev_tstamp now, diff; /* monotonic clock */	255	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		256
		257	#ifdef _WIN32
		258	# include "ev_win32.c"
		259	#endif
		260
		261	/*****************************************************************************/
		262
		263	static void (syserr_cb)(const char msg);
		264
		265	void
		266	ev_set_syserr_cb (void (cb)(const char msg))
		267	{
		268	syserr_cb = cb;
		269	}
		270
		271	static void noinline
		272	syserr (const char *msg)
		273	{
		274	if (!msg)
		275	msg = "(libev) system error";
		276
		277	if (syserr_cb)
		278	syserr_cb (msg);
		279	else
		280	{
		281	perror (msg);
		282	abort ();
		283	}
		284	}
		285
		286	static void (alloc)(void *ptr, long size);
		287
		288	void
		289	ev_set_allocator (void (cb)(void *ptr, long size))
		290	{
		291	alloc = cb;
		292	}
		293
		294	inline_speed void *
		295	ev_realloc (void *ptr, long size)
		296	{
		297	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		298
		299	if (!ptr && size)
		300	{
		301	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		302	abort ();
		303	}
		304
		305	return ptr;
		306	}
		307
		308	#define ev_malloc(size) ev_realloc (0, (size))
		309	#define ev_free(ptr) ev_realloc ((ptr), 0)
		310
		311	/*****************************************************************************/
		312
		313	typedef struct
		314	{
		315	WL head;
		316	unsigned char events;
		317	unsigned char reify;
		318	#if EV_SELECT_IS_WINSOCKET
		319	SOCKET handle;
		320	#endif
		321	} ANFD;
		322
		323	typedef struct
		324	{
		325	W w;
		326	int events;
		327	} ANPENDING;
		328
		329	#if EV_USE_INOTIFY
		330	typedef struct
		331	{
		332	WL head;
		333	} ANFS;
		334	#endif
		335
		336	#if EV_MULTIPLICITY
		337
		338	struct ev_loop
		339	{
		340	ev_tstamp ev_rt_now;
		341	#define ev_rt_now ((loop)->ev_rt_now)
		342	#define VAR(name,decl) decl;
		343	#include "ev_vars.h"
		344	#undef VAR
		345	};
		346	#include "ev_wrap.h"
		347
		348	static struct ev_loop default_loop_struct;
		349	struct ev_loop *ev_default_loop_ptr;
		350
		351	#else
		352
74	ev_tstamp ev_now;	353	ev_tstamp ev_rt_now;
75	int ev_method;	354	#define VAR(name,decl) static decl;
		355	#include "ev_vars.h"
		356	#undef VAR
76		357
77	static int have_monotonic; /* runtime */	358	static int ev_default_loop_ptr;
78		359
79	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	360	#endif
80	static void (*method_modify)(int fd, int oev, int nev);
81	static void (*method_poll)(ev_tstamp timeout);
82		361
83	/*****************************************************************************/	362	/*****************************************************************************/
84		363
85	ev_tstamp	364	ev_tstamp
86	ev_time (void)	365	ev_time (void)
87	{	366	{
88	#if HAVE_REALTIME	367	#if EV_USE_REALTIME
89	struct timespec ts;	368	struct timespec ts;
90	clock_gettime (CLOCK_REALTIME, &ts);	369	clock_gettime (CLOCK_REALTIME, &ts);
91	return ts.tv_sec + ts.tv_nsec * 1e-9;	370	return ts.tv_sec + ts.tv_nsec * 1e-9;
92	#else	371	#else
93	struct timeval tv;	372	struct timeval tv;
94	gettimeofday (&tv, 0);	373	gettimeofday (&tv, 0);
95	return tv.tv_sec + tv.tv_usec * 1e-6;	374	return tv.tv_sec + tv.tv_usec * 1e-6;
96	#endif	375	#endif
97	}	376	}
98		377
99	static ev_tstamp	378	ev_tstamp inline_size
100	get_clock (void)	379	get_clock (void)
101	{	380	{
102	#if HAVE_MONOTONIC	381	#if EV_USE_MONOTONIC
103	if (have_monotonic)	382	if (expect_true (have_monotonic))
104	{	383	{
105	struct timespec ts;	384	struct timespec ts;
106	clock_gettime (CLOCK_MONOTONIC, &ts);	385	clock_gettime (CLOCK_MONOTONIC, &ts);
107	return ts.tv_sec + ts.tv_nsec * 1e-9;	386	return ts.tv_sec + ts.tv_nsec * 1e-9;
108	}	387	}
109	#endif	388	#endif
110		389
111	return ev_time ();	390	return ev_time ();
112	}	391	}
113		392
		393	#if EV_MULTIPLICITY
		394	ev_tstamp
		395	ev_now (EV_P)
		396	{
		397	return ev_rt_now;
		398	}
		399	#endif
		400
		401	int inline_size
		402	array_nextsize (int elem, int cur, int cnt)
		403	{
		404	int ncur = cur + 1;
		405
		406	do
		407	ncur <<= 1;
		408	while (cnt > ncur);
		409
		410	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		411	if (elem * ncur > 4096)
		412	{
		413	ncur *= elem;
		414	ncur = (ncur + elem + 4095 + sizeof (void ) 4) & ~4095;
		415	ncur = ncur - sizeof (void ) 4;
		416	ncur /= elem;
		417	}
		418
		419	return ncur;
		420	}
		421
		422	inline_speed void *
		423	array_realloc (int elem, void base, int cur, int cnt)
		424	{
		425	cur = array_nextsize (elem, cur, cnt);
		426	return ev_realloc (base, elem * *cur);
		427	}
		428
114	#define array_needsize(base,cur,cnt,init) \	429	#define array_needsize(type,base,cur,cnt,init) \
115	if ((cnt) > cur) \	430	if (expect_false ((cnt) > (cur))) \
116	{ \	431	{ \
117	int newcnt = cur ? cur << 1 : 16; \	432	int ocur_ = (cur); \
118	base = realloc (base, sizeof (base) (newcnt)); \	433	(base) = (type *)array_realloc \
119	init (base + cur, newcnt - cur); \	434	(sizeof (type), (base), &(cur), (cnt)); \
120	cur = newcnt; \	435	init ((base) + (ocur_), (cur) - ocur_); \
121	}	436	}
		437
		438	#if 0
		439	#define array_slim(type,stem) \
		440	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		441	{ \
		442	stem ## max = array_roundsize (stem ## cnt >> 1); \
		443	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
		444	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		445	}
		446	#endif
		447
		448	#define array_free(stem, idx) \
		449	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
122		450
123	/*****************************************************************************/	451	/*****************************************************************************/
124		452
		453	void noinline
		454	ev_feed_event (EV_P_ void *w, int revents)
		455	{
		456	W w_ = (W)w;
		457
		458	if (expect_false (w_->pending))
		459	{
		460	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		461	return;
		462	}
		463
		464	w_->pending = ++pendingcnt [ABSPRI (w_)];
		465	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		466	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		467	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		468	}
		469
		470	void inline_size
		471	queue_events (EV_P_ W *events, int eventcnt, int type)
		472	{
		473	int i;
		474
		475	for (i = 0; i < eventcnt; ++i)
		476	ev_feed_event (EV_A_ events [i], type);
		477	}
		478
		479	/*****************************************************************************/
		480
		481	void inline_size
		482	anfds_init (ANFD *base, int count)
		483	{
		484	while (count--)
		485	{
		486	base->head = 0;
		487	base->events = EV_NONE;
		488	base->reify = 0;
		489
		490	++base;
		491	}
		492	}
		493
		494	void inline_speed
		495	fd_event (EV_P_ int fd, int revents)
		496	{
		497	ANFD *anfd = anfds + fd;
		498	ev_io *w;
		499
		500	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
		501	{
		502	int ev = w->events & revents;
		503
		504	if (ev)
		505	ev_feed_event (EV_A_ (W)w, ev);
		506	}
		507	}
		508
		509	void
		510	ev_feed_fd_event (EV_P_ int fd, int revents)
		511	{
		512	fd_event (EV_A_ fd, revents);
		513	}
		514
		515	void inline_size
		516	fd_reify (EV_P)
		517	{
		518	int i;
		519
		520	for (i = 0; i < fdchangecnt; ++i)
		521	{
		522	int fd = fdchanges [i];
		523	ANFD *anfd = anfds + fd;
		524	ev_io *w;
		525
		526	int events = 0;
		527
		528	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
		529	events \|= w->events;
		530
		531	#if EV_SELECT_IS_WINSOCKET
		532	if (events)
		533	{
		534	unsigned long argp;
		535	anfd->handle = _get_osfhandle (fd);
		536	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		537	}
		538	#endif
		539
		540	anfd->reify = 0;
		541
		542	backend_modify (EV_A_ fd, anfd->events, events);
		543	anfd->events = events;
		544	}
		545
		546	fdchangecnt = 0;
		547	}
		548
		549	void inline_size
		550	fd_change (EV_P_ int fd)
		551	{
		552	if (expect_false (anfds [fd].reify))
		553	return;
		554
		555	anfds [fd].reify = 1;
		556
		557	++fdchangecnt;
		558	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
		559	fdchanges [fdchangecnt - 1] = fd;
		560	}
		561
		562	void inline_speed
		563	fd_kill (EV_P_ int fd)
		564	{
		565	ev_io *w;
		566
		567	while ((w = (ev_io *)anfds [fd].head))
		568	{
		569	ev_io_stop (EV_A_ w);
		570	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		571	}
		572	}
		573
		574	int inline_size
		575	fd_valid (int fd)
		576	{
		577	#ifdef _WIN32
		578	return _get_osfhandle (fd) != -1;
		579	#else
		580	return fcntl (fd, F_GETFD) != -1;
		581	#endif
		582	}
		583
		584	/* called on EBADF to verify fds */
		585	static void noinline
		586	fd_ebadf (EV_P)
		587	{
		588	int fd;
		589
		590	for (fd = 0; fd < anfdmax; ++fd)
		591	if (anfds [fd].events)
		592	if (!fd_valid (fd) == -1 && errno == EBADF)
		593	fd_kill (EV_A_ fd);
		594	}
		595
		596	/* called on ENOMEM in select/poll to kill some fds and retry */
		597	static void noinline
		598	fd_enomem (EV_P)
		599	{
		600	int fd;
		601
		602	for (fd = anfdmax; fd--; )
		603	if (anfds [fd].events)
		604	{
		605	fd_kill (EV_A_ fd);
		606	return;
		607	}
		608	}
		609
		610	/* usually called after fork if backend needs to re-arm all fds from scratch */
		611	static void noinline
		612	fd_rearm_all (EV_P)
		613	{
		614	int fd;
		615
		616	for (fd = 0; fd < anfdmax; ++fd)
		617	if (anfds [fd].events)
		618	{
		619	anfds [fd].events = 0;
		620	fd_change (EV_A_ fd);
		621	}
		622	}
		623
		624	/*****************************************************************************/
		625
		626	void inline_speed
		627	upheap (WT *heap, int k)
		628	{
		629	WT w = heap [k];
		630
		631	while (k && heap [k >> 1]->at > w->at)
		632	{
		633	heap [k] = heap [k >> 1];
		634	((W)heap [k])->active = k + 1;
		635	k >>= 1;
		636	}
		637
		638	heap [k] = w;
		639	((W)heap [k])->active = k + 1;
		640
		641	}
		642
		643	void inline_speed
		644	downheap (WT *heap, int N, int k)
		645	{
		646	WT w = heap [k];
		647
		648	while (k < (N >> 1))
		649	{
		650	int j = k << 1;
		651
		652	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
		653	++j;
		654
		655	if (w->at <= heap [j]->at)
		656	break;
		657
		658	heap [k] = heap [j];
		659	((W)heap [k])->active = k + 1;
		660	k = j;
		661	}
		662
		663	heap [k] = w;
		664	((W)heap [k])->active = k + 1;
		665	}
		666
		667	void inline_size
		668	adjustheap (WT *heap, int N, int k)
		669	{
		670	upheap (heap, k);
		671	downheap (heap, N, k);
		672	}
		673
		674	/*****************************************************************************/
		675
125	typedef struct	676	typedef struct
126	{	677	{
127	struct ev_io *head;	678	WL head;
128	unsigned char wev, rev; /* want, received event set */
129	} ANFD;
130
131	static ANFD *anfds;
132	static int anfdmax;
133
134	static int *fdchanges;
135	static int fdchangemax, fdchangecnt;
136
137	static void
138	anfds_init (ANFD *base, int count)
139	{
140	while (count--)
141	{
142	base->head = 0;
143	base->wev = base->rev = EV_NONE;
144	++base;
145	}
146	}
147
148	typedef struct
149	{
150	W w;
151	int events;
152	} ANPENDING;
153
154	static ANPENDING *pendings;
155	static int pendingmax, pendingcnt;
156
157	static void
158	event (W w, int events)
159	{
160	if (w->active)
161	{
162	w->pending = ++pendingcnt;
163	array_needsize (pendings, pendingmax, pendingcnt, );
164	pendings [pendingcnt - 1].w = w;
165	pendings [pendingcnt - 1].events = events;
166	}
167	}
168
169	static void
170	fd_event (int fd, int events)
171	{
172	ANFD *anfd = anfds + fd;
173	struct ev_io *w;
174
175	for (w = anfd->head; w; w = w->next)
176	{
177	int ev = w->events & events;
178
179	if (ev)
180	event ((W)w, ev);
181	}
182	}
183
184	static void
185	queue_events (W *events, int eventcnt, int type)
186	{
187	int i;
188
189	for (i = 0; i < eventcnt; ++i)
190	event (events [i], type);
191	}
192
193	/*****************************************************************************/
194
195	static struct ev_timer **timers;
196	static int timermax, timercnt;
197
198	static struct ev_periodic **periodics;
199	static int periodicmax, periodiccnt;
200
201	static void
202	upheap (WT *timers, int k)
203	{
204	WT w = timers [k];
205
206	while (k && timers [k >> 1]->at > w->at)
207	{
208	timers [k] = timers [k >> 1];
209	timers [k]->active = k + 1;
210	k >>= 1;
211	}
212
213	timers [k] = w;
214	timers [k]->active = k + 1;
215
216	}
217
218	static void
219	downheap (WT *timers, int N, int k)
220	{
221	WT w = timers [k];
222
223	while (k < (N >> 1))
224	{
225	int j = k << 1;
226
227	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
228	++j;
229
230	if (w->at <= timers [j]->at)
231	break;
232
233	timers [k] = timers [j];
234	timers [k]->active = k + 1;
235	k = j;
236	}
237
238	timers [k] = w;
239	timers [k]->active = k + 1;
240	}
241
242	/*****************************************************************************/
243
244	typedef struct
245	{
246	struct ev_signal *head;
247	sig_atomic_t gotsig;	679	sig_atomic_t volatile gotsig;
248	} ANSIG;	680	} ANSIG;
249		681
250	static ANSIG *signals;	682	static ANSIG *signals;
251	static int signalmax;	683	static int signalmax;
252		684
253	static int sigpipe [2];	685	static int sigpipe [2];
254	static sig_atomic_t gotsig;	686	static sig_atomic_t volatile gotsig;
255	static struct ev_io sigev;	687	static ev_io sigev;
256		688
257	static void	689	void inline_size
258	signals_init (ANSIG *base, int count)	690	signals_init (ANSIG *base, int count)
259	{	691	{
260	while (count--)	692	while (count--)
261	{	693	{
262	base->head = 0;	694	base->head = 0;
263	base->gotsig = 0;	695	base->gotsig = 0;
		696
264	++base;	697	++base;
265	}	698	}
266	}	699	}
267		700
268	static void	701	static void
269	sighandler (int signum)	702	sighandler (int signum)
270	{	703	{
		704	#if _WIN32
		705	signal (signum, sighandler);
		706	#endif
		707
271	signals [signum - 1].gotsig = 1;	708	signals [signum - 1].gotsig = 1;
272		709
273	if (!gotsig)	710	if (!gotsig)
274	{	711	{
		712	int old_errno = errno;
275	gotsig = 1;	713	gotsig = 1;
276	write (sigpipe [1], &gotsig, 1);	714	write (sigpipe [1], &signum, 1);
		715	errno = old_errno;
277	}	716	}
		717	}
		718
		719	void noinline
		720	ev_feed_signal_event (EV_P_ int signum)
		721	{
		722	WL w;
		723
		724	#if EV_MULTIPLICITY
		725	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		726	#endif
		727
		728	--signum;
		729
		730	if (signum < 0 \|\| signum >= signalmax)
		731	return;
		732
		733	signals [signum].gotsig = 0;
		734
		735	for (w = signals [signum].head; w; w = w->next)
		736	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
278	}	737	}
279		738
280	static void	739	static void
281	sigcb (struct ev_io *iow, int revents)	740	sigcb (EV_P_ ev_io *iow, int revents)
282	{	741	{
283	struct ev_signal *w;
284	int sig;	742	int signum;
285		743
		744	read (sigpipe [0], &revents, 1);
286	gotsig = 0;	745	gotsig = 0;
287	read (sigpipe [0], &revents, 1);
288		746
289	for (sig = signalmax; sig--; )	747	for (signum = signalmax; signum--; )
290	if (signals [sig].gotsig)	748	if (signals [signum].gotsig)
		749	ev_feed_signal_event (EV_A_ signum + 1);
		750	}
		751
		752	void inline_size
		753	fd_intern (int fd)
		754	{
		755	#ifdef _WIN32
		756	int arg = 1;
		757	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		758	#else
		759	fcntl (fd, F_SETFD, FD_CLOEXEC);
		760	fcntl (fd, F_SETFL, O_NONBLOCK);
		761	#endif
		762	}
		763
		764	static void noinline
		765	siginit (EV_P)
		766	{
		767	fd_intern (sigpipe [0]);
		768	fd_intern (sigpipe [1]);
		769
		770	ev_io_set (&sigev, sigpipe [0], EV_READ);
		771	ev_io_start (EV_A_ &sigev);
		772	ev_unref (EV_A); /* child watcher should not keep loop alive */
		773	}
		774
		775	/*****************************************************************************/
		776
		777	static ev_child *childs [EV_PID_HASHSIZE];
		778
		779	#ifndef _WIN32
		780
		781	static ev_signal childev;
		782
		783	void inline_speed
		784	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		785	{
		786	ev_child *w;
		787
		788	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)
		789	if (w->pid == pid \|\| !w->pid)
291	{	790	{
292	signals [sig].gotsig = 0;	791	ev_priority (w) = ev_priority (sw); /* need to do it now */
293		792	w->rpid = pid;
294	for (w = signals [sig].head; w; w = w->next)	793	w->rstatus = status;
295	event ((W)w, EV_SIGNAL);	794	ev_feed_event (EV_A_ (W)w, EV_CHILD);
296	}	795	}
297	}	796	}
298		797
		798	#ifndef WCONTINUED
		799	# define WCONTINUED 0
		800	#endif
		801
299	static void	802	static void
300	siginit (void)	803	childcb (EV_P_ ev_signal *sw, int revents)
301	{	804	{
302	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	805	int pid, status;
303	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
304		806
305	/* rather than sort out wether we really need nb, set it */	807	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
306	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	808	if (0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
307	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	809	if (!WCONTINUED
		810	\|\| errno != EINVAL
		811	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))
		812	return;
308		813
309	evio_set (&sigev, sigpipe [0], EV_READ);	814	/* make sure we are called again until all childs have been reaped */
310	evio_start (&sigev);	815	/* we need to do it this way so that the callback gets called before we continue */
		816	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		817
		818	child_reap (EV_A_ sw, pid, pid, status);
		819	if (EV_PID_HASHSIZE > 1)
		820	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
311	}	821	}
		822
		823	#endif
312		824
313	/*****************************************************************************/	825	/*****************************************************************************/
314		826
315	static struct ev_idle **idles;	827	#if EV_USE_PORT
316	static int idlemax, idlecnt;	828	# include "ev_port.c"
		829	#endif
		830	#if EV_USE_KQUEUE
		831	# include "ev_kqueue.c"
		832	#endif
		833	#if EV_USE_EPOLL
		834	# include "ev_epoll.c"
		835	#endif
		836	#if EV_USE_POLL
		837	# include "ev_poll.c"
		838	#endif
		839	#if EV_USE_SELECT
		840	# include "ev_select.c"
		841	#endif
317		842
318	static struct ev_check **checks;	843	int
319	static int checkmax, checkcnt;	844	ev_version_major (void)
		845	{
		846	return EV_VERSION_MAJOR;
		847	}
		848
		849	int
		850	ev_version_minor (void)
		851	{
		852	return EV_VERSION_MINOR;
		853	}
		854
		855	/* return true if we are running with elevated privileges and should ignore env variables */
		856	int inline_size
		857	enable_secure (void)
		858	{
		859	#ifdef _WIN32
		860	return 0;
		861	#else
		862	return getuid () != geteuid ()
		863	\|\| getgid () != getegid ();
		864	#endif
		865	}
		866
		867	unsigned int
		868	ev_supported_backends (void)
		869	{
		870	unsigned int flags = 0;
		871
		872	if (EV_USE_PORT ) flags \|= EVBACKEND_PORT;
		873	if (EV_USE_KQUEUE) flags \|= EVBACKEND_KQUEUE;
		874	if (EV_USE_EPOLL ) flags \|= EVBACKEND_EPOLL;
		875	if (EV_USE_POLL ) flags \|= EVBACKEND_POLL;
		876	if (EV_USE_SELECT) flags \|= EVBACKEND_SELECT;
		877
		878	return flags;
		879	}
		880
		881	unsigned int
		882	ev_recommended_backends (void)
		883	{
		884	unsigned int flags = ev_supported_backends ();
		885
		886	#ifndef __NetBSD__
		887	/* kqueue is borked on everything but netbsd apparently */
		888	/* it usually doesn't work correctly on anything but sockets and pipes */
		889	flags &= ~EVBACKEND_KQUEUE;
		890	#endif
		891	#ifdef __APPLE__
		892	// flags &= ~EVBACKEND_KQUEUE; for documentation
		893	flags &= ~EVBACKEND_POLL;
		894	#endif
		895
		896	return flags;
		897	}
		898
		899	unsigned int
		900	ev_embeddable_backends (void)
		901	{
		902	return EVBACKEND_EPOLL
		903	\| EVBACKEND_KQUEUE
		904	\| EVBACKEND_PORT;
		905	}
		906
		907	unsigned int
		908	ev_backend (EV_P)
		909	{
		910	return backend;
		911	}
		912
		913	unsigned int
		914	ev_loop_count (EV_P)
		915	{
		916	return loop_count;
		917	}
		918
		919	static void noinline
		920	loop_init (EV_P_ unsigned int flags)
		921	{
		922	if (!backend)
		923	{
		924	#if EV_USE_MONOTONIC
		925	{
		926	struct timespec ts;
		927	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		928	have_monotonic = 1;
		929	}
		930	#endif
		931
		932	ev_rt_now = ev_time ();
		933	mn_now = get_clock ();
		934	now_floor = mn_now;
		935	rtmn_diff = ev_rt_now - mn_now;
		936
		937	/* pid check not overridable via env */
		938	#ifndef _WIN32
		939	if (flags & EVFLAG_FORKCHECK)
		940	curpid = getpid ();
		941	#endif
		942
		943	if (!(flags & EVFLAG_NOENV)
		944	&& !enable_secure ()
		945	&& getenv ("LIBEV_FLAGS"))
		946	flags = atoi (getenv ("LIBEV_FLAGS"));
		947
		948	if (!(flags & 0x0000ffffUL))
		949	flags \|= ev_recommended_backends ();
		950
		951	backend = 0;
		952	backend_fd = -1;
		953	#if EV_USE_INOTIFY
		954	fs_fd = -2;
		955	#endif
		956
		957	#if EV_USE_PORT
		958	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		959	#endif
		960	#if EV_USE_KQUEUE
		961	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		962	#endif
		963	#if EV_USE_EPOLL
		964	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		965	#endif
		966	#if EV_USE_POLL
		967	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
		968	#endif
		969	#if EV_USE_SELECT
		970	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
		971	#endif
		972
		973	ev_init (&sigev, sigcb);
		974	ev_set_priority (&sigev, EV_MAXPRI);
		975	}
		976	}
		977
		978	static void noinline
		979	loop_destroy (EV_P)
		980	{
		981	int i;
		982
		983	#if EV_USE_INOTIFY
		984	if (fs_fd >= 0)
		985	close (fs_fd);
		986	#endif
		987
		988	if (backend_fd >= 0)
		989	close (backend_fd);
		990
		991	#if EV_USE_PORT
		992	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		993	#endif
		994	#if EV_USE_KQUEUE
		995	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		996	#endif
		997	#if EV_USE_EPOLL
		998	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		999	#endif
		1000	#if EV_USE_POLL
		1001	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		1002	#endif
		1003	#if EV_USE_SELECT
		1004	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		1005	#endif
		1006
		1007	for (i = NUMPRI; i--; )
		1008	array_free (pending, [i]);
		1009
		1010	/* have to use the microsoft-never-gets-it-right macro */
		1011	array_free (fdchange, EMPTY0);
		1012	array_free (timer, EMPTY0);
		1013	#if EV_PERIODIC_ENABLE
		1014	array_free (periodic, EMPTY0);
		1015	#endif
		1016	array_free (idle, EMPTY0);
		1017	array_free (prepare, EMPTY0);
		1018	array_free (check, EMPTY0);
		1019
		1020	backend = 0;
		1021	}
		1022
		1023	void inline_size infy_fork (EV_P);
		1024
		1025	void inline_size
		1026	loop_fork (EV_P)
		1027	{
		1028	#if EV_USE_PORT
		1029	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		1030	#endif
		1031	#if EV_USE_KQUEUE
		1032	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		1033	#endif
		1034	#if EV_USE_EPOLL
		1035	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1036	#endif
		1037	#if EV_USE_INOTIFY
		1038	infy_fork (EV_A);
		1039	#endif
		1040
		1041	if (ev_is_active (&sigev))
		1042	{
		1043	/* default loop */
		1044
		1045	ev_ref (EV_A);
		1046	ev_io_stop (EV_A_ &sigev);
		1047	close (sigpipe [0]);
		1048	close (sigpipe [1]);
		1049
		1050	while (pipe (sigpipe))
		1051	syserr ("(libev) error creating pipe");
		1052
		1053	siginit (EV_A);
		1054	}
		1055
		1056	postfork = 0;
		1057	}
		1058
		1059	#if EV_MULTIPLICITY
		1060	struct ev_loop *
		1061	ev_loop_new (unsigned int flags)
		1062	{
		1063	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		1064
		1065	memset (loop, 0, sizeof (struct ev_loop));
		1066
		1067	loop_init (EV_A_ flags);
		1068
		1069	if (ev_backend (EV_A))
		1070	return loop;
		1071
		1072	return 0;
		1073	}
		1074
		1075	void
		1076	ev_loop_destroy (EV_P)
		1077	{
		1078	loop_destroy (EV_A);
		1079	ev_free (loop);
		1080	}
		1081
		1082	void
		1083	ev_loop_fork (EV_P)
		1084	{
		1085	postfork = 1;
		1086	}
		1087
		1088	#endif
		1089
		1090	#if EV_MULTIPLICITY
		1091	struct ev_loop *
		1092	ev_default_loop_init (unsigned int flags)
		1093	#else
		1094	int
		1095	ev_default_loop (unsigned int flags)
		1096	#endif
		1097	{
		1098	if (sigpipe [0] == sigpipe [1])
		1099	if (pipe (sigpipe))
		1100	return 0;
		1101
		1102	if (!ev_default_loop_ptr)
		1103	{
		1104	#if EV_MULTIPLICITY
		1105	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1106	#else
		1107	ev_default_loop_ptr = 1;
		1108	#endif
		1109
		1110	loop_init (EV_A_ flags);
		1111
		1112	if (ev_backend (EV_A))
		1113	{
		1114	siginit (EV_A);
		1115
		1116	#ifndef _WIN32
		1117	ev_signal_init (&childev, childcb, SIGCHLD);
		1118	ev_set_priority (&childev, EV_MAXPRI);
		1119	ev_signal_start (EV_A_ &childev);
		1120	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1121	#endif
		1122	}
		1123	else
		1124	ev_default_loop_ptr = 0;
		1125	}
		1126
		1127	return ev_default_loop_ptr;
		1128	}
		1129
		1130	void
		1131	ev_default_destroy (void)
		1132	{
		1133	#if EV_MULTIPLICITY
		1134	struct ev_loop *loop = ev_default_loop_ptr;
		1135	#endif
		1136
		1137	#ifndef _WIN32
		1138	ev_ref (EV_A); /* child watcher */
		1139	ev_signal_stop (EV_A_ &childev);
		1140	#endif
		1141
		1142	ev_ref (EV_A); /* signal watcher */
		1143	ev_io_stop (EV_A_ &sigev);
		1144
		1145	close (sigpipe [0]); sigpipe [0] = 0;
		1146	close (sigpipe [1]); sigpipe [1] = 0;
		1147
		1148	loop_destroy (EV_A);
		1149	}
		1150
		1151	void
		1152	ev_default_fork (void)
		1153	{
		1154	#if EV_MULTIPLICITY
		1155	struct ev_loop *loop = ev_default_loop_ptr;
		1156	#endif
		1157
		1158	if (backend)
		1159	postfork = 1;
		1160	}
320		1161
321	/*****************************************************************************/	1162	/*****************************************************************************/
322		1163
323	#if HAVE_EPOLL	1164	int inline_size
324	# include "ev_epoll.c"	1165	any_pending (EV_P)
325	#endif
326	#if HAVE_SELECT
327	# include "ev_select.c"
328	#endif
329
330	int ev_init (int flags)
331	{	1166	{
332	#if HAVE_MONOTONIC	1167	int pri;
333	{
334	struct timespec ts;
335	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
336	have_monotonic = 1;
337	}
338	#endif
339		1168
340	ev_now = ev_time ();	1169	for (pri = NUMPRI; pri--; )
341	now = get_clock ();	1170	if (pendingcnt [pri])
342	diff = ev_now - now;	1171	return 1;
343		1172
344	if (pipe (sigpipe))
345	return 0;	1173	return 0;
346
347	ev_method = EVMETHOD_NONE;
348	#if HAVE_EPOLL
349	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
350	#endif
351	#if HAVE_SELECT
352	if (ev_method == EVMETHOD_NONE) select_init (flags);
353	#endif
354
355	if (ev_method)
356	{
357	evw_init (&sigev, sigcb);
358	siginit ();
359	}
360
361	return ev_method;
362	}	1174	}
363		1175
364	/*****************************************************************************/	1176	void inline_speed
365		1177	call_pending (EV_P)
366	void ev_prefork (void)
367	{	1178	{
368	/* nop */
369	}
370
371	void ev_postfork_parent (void)
372	{
373	/* nop */
374	}
375
376	void ev_postfork_child (void)
377	{
378	#if HAVE_EPOLL
379	if (ev_method == EVMETHOD_EPOLL)
380	epoll_postfork_child ();
381	#endif
382
383	evio_stop (&sigev);
384	close (sigpipe [0]);
385	close (sigpipe [1]);
386	pipe (sigpipe);
387	siginit ();
388	}
389
390	/*****************************************************************************/
391
392	static void
393	fd_reify (void)
394	{
395	int i;	1179	int pri;
396		1180
397	for (i = 0; i < fdchangecnt; ++i)	1181	for (pri = NUMPRI; pri--; )
		1182	while (pendingcnt [pri])
398	{	1183	{
399	int fd = fdchanges [i];	1184	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
400	ANFD *anfd = anfds + fd;
401	struct ev_io *w;
402		1185
403	int wev = 0;	1186	if (expect_true (p->w))
404
405	for (w = anfd->head; w; w = w->next)
406	wev \|= w->events;
407
408	if (anfd->wev != wev)
409	{	1187	{
410	method_modify (fd, anfd->wev, wev);	1188	/assert (("non-pending watcher on pending list", p->w->pending));/
411	anfd->wev = wev;
412	}
413	}
414		1189
415	fdchangecnt = 0;
416	}
417
418	static void
419	call_pending ()
420	{
421	while (pendingcnt)
422	{
423	ANPENDING *p = pendings + --pendingcnt;
424
425	if (p->w)
426	{
427	p->w->pending = 0;	1190	p->w->pending = 0;
428	p->w->cb (p->w, p->events);	1191	EV_CB_INVOKE (p->w, p->events);
429	}	1192	}
430	}	1193	}
431	}	1194	}
432		1195
433	static void	1196	void inline_size
434	timers_reify ()	1197	timers_reify (EV_P)
435	{	1198	{
436	while (timercnt && timers [0]->at <= now)	1199	while (timercnt && ((WT)timers [0])->at <= mn_now)
437	{	1200	{
438	struct ev_timer *w = timers [0];	1201	ev_timer *w = timers [0];
439		1202
440	event ((W)w, EV_TIMEOUT);	1203	/assert (("inactive timer on timer heap detected", ev_is_active (w)));/
441		1204
442	/* first reschedule or stop timer */	1205	/* first reschedule or stop timer */
443	if (w->repeat)	1206	if (w->repeat)
444	{	1207	{
		1208	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1209
445	w->at = now + w->repeat;	1210	((WT)w)->at += w->repeat;
446	assert (("timer timeout in the past, negative repeat?", w->at > now));	1211	if (((WT)w)->at < mn_now)
		1212	((WT)w)->at = mn_now;
		1213
447	downheap ((WT *)timers, timercnt, 0);	1214	downheap ((WT *)timers, timercnt, 0);
448	}	1215	}
449	else	1216	else
450	evtimer_stop (w); /* nonrepeating: stop timer */	1217	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
451	}
452	}
453		1218
454	static void	1219	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1220	}
		1221	}
		1222
		1223	#if EV_PERIODIC_ENABLE
		1224	void inline_size
455	periodics_reify ()	1225	periodics_reify (EV_P)
456	{	1226	{
457	while (periodiccnt && periodics [0]->at <= ev_now)	1227	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
458	{	1228	{
459	struct ev_periodic *w = periodics [0];	1229	ev_periodic *w = periodics [0];
		1230
		1231	/assert (("inactive timer on periodic heap detected", ev_is_active (w)));/
460		1232
461	/* first reschedule or stop timer */	1233	/* first reschedule or stop timer */
462	if (w->interval)	1234	if (w->reschedule_cb)
463	{	1235	{
		1236	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1237	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1238	downheap ((WT *)periodics, periodiccnt, 0);
		1239	}
		1240	else if (w->interval)
		1241	{
464	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1242	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
465	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1243	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
466	downheap ((WT *)periodics, periodiccnt, 0);	1244	downheap ((WT *)periodics, periodiccnt, 0);
467	}	1245	}
468	else	1246	else
469	evperiodic_stop (w); /* nonrepeating: stop timer */	1247	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
470		1248
471	event ((W)w, EV_TIMEOUT);	1249	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
472	}	1250	}
473	}	1251	}
474		1252
475	static void	1253	static void noinline
476	periodics_reschedule (ev_tstamp diff)	1254	periodics_reschedule (EV_P)
477	{	1255	{
478	int i;	1256	int i;
479		1257
480	/* adjust periodics after time jump */	1258	/* adjust periodics after time jump */
481	for (i = 0; i < periodiccnt; ++i)	1259	for (i = 0; i < periodiccnt; ++i)
482	{	1260	{
483	struct ev_periodic *w = periodics [i];	1261	ev_periodic *w = periodics [i];
484		1262
		1263	if (w->reschedule_cb)
		1264	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
485	if (w->interval)	1265	else if (w->interval)
		1266	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1267	}
		1268
		1269	/* now rebuild the heap */
		1270	for (i = periodiccnt >> 1; i--; )
		1271	downheap ((WT *)periodics, periodiccnt, i);
		1272	}
		1273	#endif
		1274
		1275	int inline_size
		1276	time_update_monotonic (EV_P)
		1277	{
		1278	mn_now = get_clock ();
		1279
		1280	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1281	{
		1282	ev_rt_now = rtmn_diff + mn_now;
		1283	return 0;
		1284	}
		1285	else
		1286	{
		1287	now_floor = mn_now;
		1288	ev_rt_now = ev_time ();
		1289	return 1;
		1290	}
		1291	}
		1292
		1293	void inline_size
		1294	time_update (EV_P)
		1295	{
		1296	int i;
		1297
		1298	#if EV_USE_MONOTONIC
		1299	if (expect_true (have_monotonic))
		1300	{
		1301	if (time_update_monotonic (EV_A))
486	{	1302	{
487	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1303	ev_tstamp odiff = rtmn_diff;
488		1304
489	if (fabs (diff) >= 1e-4)	1305	/* loop a few times, before making important decisions.
		1306	* on the choice of "4": one iteration isn't enough,
		1307	* in case we get preempted during the calls to
		1308	* ev_time and get_clock. a second call is almost guaranteed
		1309	* to succeed in that case, though. and looping a few more times
		1310	* doesn't hurt either as we only do this on time-jumps or
		1311	* in the unlikely event of having been preempted here.
		1312	*/
		1313	for (i = 4; --i; )
490	{	1314	{
491	evperiodic_stop (w);	1315	rtmn_diff = ev_rt_now - mn_now;
492	evperiodic_start (w);
493		1316
494	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1317	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1318	return; /* all is well */
		1319
		1320	ev_rt_now = ev_time ();
		1321	mn_now = get_clock ();
		1322	now_floor = mn_now;
495	}	1323	}
		1324
		1325	# if EV_PERIODIC_ENABLE
		1326	periodics_reschedule (EV_A);
		1327	# endif
		1328	/* no timer adjustment, as the monotonic clock doesn't jump */
		1329	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
496	}	1330	}
497	}	1331	}
498	}	1332	else
499		1333	#endif
500	static void	1334	{
501	time_update ()
502	{
503	int i;
504
505	ev_now = ev_time ();	1335	ev_rt_now = ev_time ();
506		1336
507	if (have_monotonic)	1337	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
508	{
509	ev_tstamp odiff = diff;
510
511	for (i = 4; --i; ) /* loop a few times, before making important decisions */
512	{	1338	{
513	now = get_clock ();	1339	#if EV_PERIODIC_ENABLE
514	diff = ev_now - now;	1340	periodics_reschedule (EV_A);
		1341	#endif
515		1342
516	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1343	/* adjust timers. this is easy, as the offset is the same for all of them */
517	return; /* all is well */	1344	for (i = 0; i < timercnt; ++i)
518		1345	((WT)timers [i])->at += ev_rt_now - mn_now;
519	ev_now = ev_time ();
520	}	1346	}
521		1347
522	periodics_reschedule (diff - odiff);	1348	mn_now = ev_rt_now;
523	/* no timer adjustment, as the monotonic clock doesn't jump */
524	}
525	else
526	{	1349	}
527	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1350	}
		1351
		1352	void
		1353	ev_ref (EV_P)
		1354	{
		1355	++activecnt;
		1356	}
		1357
		1358	void
		1359	ev_unref (EV_P)
		1360	{
		1361	--activecnt;
		1362	}
		1363
		1364	static int loop_done;
		1365
		1366	void
		1367	ev_loop (EV_P_ int flags)
		1368	{
		1369	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)
		1370	? EVUNLOOP_ONE
		1371	: EVUNLOOP_CANCEL;
		1372
		1373	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
		1374
		1375	do
		1376	{
		1377	#ifndef _WIN32
		1378	if (expect_false (curpid)) /* penalise the forking check even more */
		1379	if (expect_false (getpid () != curpid))
		1380	{
		1381	curpid = getpid ();
		1382	postfork = 1;
		1383	}
		1384	#endif
		1385
		1386	#if EV_FORK_ENABLE
		1387	/* we might have forked, so queue fork handlers */
		1388	if (expect_false (postfork))
		1389	if (forkcnt)
		1390	{
		1391	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1392	call_pending (EV_A);
		1393	}
		1394	#endif
		1395
		1396	/* queue check watchers (and execute them) */
		1397	if (expect_false (preparecnt))
528	{	1398	{
529	periodics_reschedule (ev_now - now);	1399	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
530		1400	call_pending (EV_A);
531	/* adjust timers. this is easy, as the offset is the same for all */
532	for (i = 0; i < timercnt; ++i)
533	timers [i]->at += diff;
534	}	1401	}
535		1402
536	now = ev_now;	1403	if (expect_false (!activecnt))
537	}	1404	break;
538	}
539		1405
540	int ev_loop_done;	1406	/* we might have forked, so reify kernel state if necessary */
		1407	if (expect_false (postfork))
		1408	loop_fork (EV_A);
541		1409
542	void ev_loop (int flags)
543	{
544	double block;
545	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
546
547	if (checkcnt)
548	{
549	queue_events ((W *)checks, checkcnt, EV_CHECK);
550	call_pending ();
551	}
552
553	do
554	{
555	/* update fd-related kernel structures */	1410	/* update fd-related kernel structures */
556	fd_reify ();	1411	fd_reify (EV_A);
557		1412
558	/* calculate blocking time */	1413	/* calculate blocking time */
		1414	{
		1415	ev_tstamp block;
559		1416
560	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1417	if (expect_false (flags & EVLOOP_NONBLOCK \|\| idlecnt \|\| !activecnt))
561	ev_now = ev_time ();	1418	block = 0.; /* do not block at all */
562
563	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
564	block = 0.;
565	else	1419	else
566	{	1420	{
		1421	/* update time to cancel out callback processing overhead */
		1422	#if EV_USE_MONOTONIC
		1423	if (expect_true (have_monotonic))
		1424	time_update_monotonic (EV_A);
		1425	else
		1426	#endif
		1427	{
		1428	ev_rt_now = ev_time ();
		1429	mn_now = ev_rt_now;
		1430	}
		1431
567	block = MAX_BLOCKTIME;	1432	block = MAX_BLOCKTIME;
568		1433
569	if (timercnt)	1434	if (timercnt)
570	{	1435	{
571	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1436	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
572	if (block > to) block = to;	1437	if (block > to) block = to;
573	}	1438	}
574		1439
		1440	#if EV_PERIODIC_ENABLE
575	if (periodiccnt)	1441	if (periodiccnt)
576	{	1442	{
577	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1443	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
578	if (block > to) block = to;	1444	if (block > to) block = to;
579	}	1445	}
		1446	#endif
580		1447
581	if (block < 0.) block = 0.;	1448	if (expect_false (block < 0.)) block = 0.;
582	}	1449	}
583		1450
584	method_poll (block);	1451	++loop_count;
		1452	backend_poll (EV_A_ block);
		1453	}
585		1454
586	/* update ev_now, do magic */	1455	/* update ev_rt_now, do magic */
587	time_update ();	1456	time_update (EV_A);
588		1457
589	/* queue pending timers and reschedule them */	1458	/* queue pending timers and reschedule them */
		1459	timers_reify (EV_A); /* relative timers called last */
		1460	#if EV_PERIODIC_ENABLE
590	periodics_reify (); /* absolute timers first */	1461	periodics_reify (EV_A); /* absolute timers called first */
591	timers_reify (); /* relative timers second */	1462	#endif
592		1463
593	/* queue idle watchers unless io or timers are pending */	1464	/* queue idle watchers unless other events are pending */
594	if (!pendingcnt)	1465	if (idlecnt && !any_pending (EV_A))
595	queue_events ((W *)idles, idlecnt, EV_IDLE);	1466	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
596		1467
597	/* queue check and possibly idle watchers */	1468	/* queue check watchers, to be executed first */
		1469	if (expect_false (checkcnt))
598	queue_events ((W *)checks, checkcnt, EV_CHECK);	1470	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
599		1471
600	call_pending ();	1472	call_pending (EV_A);
601	}
602	while (!ev_loop_done);
603		1473
604	if (ev_loop_done != 2)	1474	}
		1475	while (expect_true (activecnt && !loop_done));
		1476
		1477	if (loop_done == EVUNLOOP_ONE)
		1478	loop_done = EVUNLOOP_CANCEL;
		1479	}
		1480
		1481	void
		1482	ev_unloop (EV_P_ int how)
		1483	{
605	ev_loop_done = 0;	1484	loop_done = how;
606	}	1485	}
607		1486
608	/*****************************************************************************/	1487	/*****************************************************************************/
609		1488
610	static void	1489	void inline_size
611	wlist_add (WL *head, WL elem)	1490	wlist_add (WL *head, WL elem)
612	{	1491	{
613	elem->next = *head;	1492	elem->next = *head;
614	*head = elem;	1493	*head = elem;
615	}	1494	}
616		1495
617	static void	1496	void inline_size
618	wlist_del (WL *head, WL elem)	1497	wlist_del (WL *head, WL elem)
619	{	1498	{
620	while (*head)	1499	while (*head)
621	{	1500	{
622	if (*head == elem)	1501	if (*head == elem)
…		…
627		1506
628	head = &(*head)->next;	1507	head = &(*head)->next;
629	}	1508	}
630	}	1509	}
631		1510
632	static void	1511	void inline_speed
633	ev_clear (W w)	1512	ev_clear_pending (EV_P_ W w)
634	{	1513	{
635	if (w->pending)	1514	if (w->pending)
636	{	1515	{
637	pendings [w->pending - 1].w = 0;	1516	pendings [ABSPRI (w)][w->pending - 1].w = 0;
638	w->pending = 0;	1517	w->pending = 0;
639	}	1518	}
640	}	1519	}
641		1520
642	static void	1521	void inline_speed
643	ev_start (W w, int active)	1522	ev_start (EV_P_ W w, int active)
644	{	1523	{
		1524	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1525	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1526
645	w->active = active;	1527	w->active = active;
		1528	ev_ref (EV_A);
646	}	1529	}
647		1530
648	static void	1531	void inline_size
649	ev_stop (W w)	1532	ev_stop (EV_P_ W w)
650	{	1533	{
		1534	ev_unref (EV_A);
651	w->active = 0;	1535	w->active = 0;
652	}	1536	}
653		1537
654	/*****************************************************************************/	1538	/*****************************************************************************/
655		1539
656	void	1540	void
657	evio_start (struct ev_io *w)	1541	ev_io_start (EV_P_ ev_io *w)
658	{	1542	{
659	if (ev_is_active (w))
660	return;
661
662	int fd = w->fd;	1543	int fd = w->fd;
663		1544
		1545	if (expect_false (ev_is_active (w)))
		1546	return;
		1547
		1548	assert (("ev_io_start called with negative fd", fd >= 0));
		1549
664	ev_start ((W)w, 1);	1550	ev_start (EV_A_ (W)w, 1);
665	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1551	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
666	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1552	wlist_add ((WL *)&anfds[fd].head, (WL)w);
667		1553
668	++fdchangecnt;	1554	fd_change (EV_A_ fd);
669	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
670	fdchanges [fdchangecnt - 1] = fd;
671	}	1555	}
672		1556
673	void	1557	void
674	evio_stop (struct ev_io *w)	1558	ev_io_stop (EV_P_ ev_io *w)
675	{	1559	{
676	ev_clear ((W)w);	1560	ev_clear_pending (EV_A_ (W)w);
677	if (!ev_is_active (w))	1561	if (expect_false (!ev_is_active (w)))
678	return;	1562	return;
		1563
		1564	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
679		1565
680	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1566	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
681	ev_stop ((W)w);	1567	ev_stop (EV_A_ (W)w);
682		1568
683	++fdchangecnt;	1569	fd_change (EV_A_ w->fd);
684	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
685	fdchanges [fdchangecnt - 1] = w->fd;
686	}	1570	}
687		1571
688	void	1572	void
689	evtimer_start (struct ev_timer *w)	1573	ev_timer_start (EV_P_ ev_timer *w)
690	{	1574	{
691	if (ev_is_active (w))	1575	if (expect_false (ev_is_active (w)))
692	return;	1576	return;
693		1577
694	w->at += now;	1578	((WT)w)->at += mn_now;
695		1579
696	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1580	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
697		1581
698	ev_start ((W)w, ++timercnt);	1582	ev_start (EV_A_ (W)w, ++timercnt);
699	array_needsize (timers, timermax, timercnt, );	1583	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
700	timers [timercnt - 1] = w;	1584	timers [timercnt - 1] = w;
701	upheap ((WT *)timers, timercnt - 1);	1585	upheap ((WT *)timers, timercnt - 1);
702	}
703		1586
		1587	/assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));/
		1588	}
		1589
704	void	1590	void
705	evtimer_stop (struct ev_timer *w)	1591	ev_timer_stop (EV_P_ ev_timer *w)
706	{	1592	{
707	ev_clear ((W)w);	1593	ev_clear_pending (EV_A_ (W)w);
708	if (!ev_is_active (w))	1594	if (expect_false (!ev_is_active (w)))
709	return;	1595	return;
710		1596
711	if (w->active < timercnt--)	1597	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1598
		1599	{
		1600	int active = ((W)w)->active;
		1601
		1602	if (expect_true (--active < --timercnt))
712	{	1603	{
713	timers [w->active - 1] = timers [timercnt];	1604	timers [active] = timers [timercnt];
714	downheap ((WT *)timers, timercnt, w->active - 1);	1605	adjustheap ((WT *)timers, timercnt, active);
715	}	1606	}
		1607	}
716		1608
717	w->at = w->repeat;	1609	((WT)w)->at -= mn_now;
718		1610
719	ev_stop ((W)w);	1611	ev_stop (EV_A_ (W)w);
720	}	1612	}
721		1613
722	void	1614	void
723	evtimer_again (struct ev_timer *w)	1615	ev_timer_again (EV_P_ ev_timer *w)
724	{	1616	{
725	if (ev_is_active (w))	1617	if (ev_is_active (w))
726	{	1618	{
727	if (w->repeat)	1619	if (w->repeat)
728	{	1620	{
729	w->at = now + w->repeat;	1621	((WT)w)->at = mn_now + w->repeat;
730	downheap ((WT *)timers, timercnt, w->active - 1);	1622	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
731	}	1623	}
732	else	1624	else
733	evtimer_stop (w);	1625	ev_timer_stop (EV_A_ w);
734	}	1626	}
735	else if (w->repeat)	1627	else if (w->repeat)
		1628	{
		1629	w->at = w->repeat;
736	evtimer_start (w);	1630	ev_timer_start (EV_A_ w);
		1631	}
737	}	1632	}
738		1633
		1634	#if EV_PERIODIC_ENABLE
739	void	1635	void
740	evperiodic_start (struct ev_periodic *w)	1636	ev_periodic_start (EV_P_ ev_periodic *w)
741	{	1637	{
742	if (ev_is_active (w))	1638	if (expect_false (ev_is_active (w)))
743	return;	1639	return;
744		1640
745	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1641	if (w->reschedule_cb)
746		1642	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1643	else if (w->interval)
		1644	{
		1645	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
747	/* this formula differs from the one in periodic_reify because we do not always round up */	1646	/* this formula differs from the one in periodic_reify because we do not always round up */
748	if (w->interval)
749	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1647	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1648	}
750		1649
751	ev_start ((W)w, ++periodiccnt);	1650	ev_start (EV_A_ (W)w, ++periodiccnt);
752	array_needsize (periodics, periodicmax, periodiccnt, );	1651	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
753	periodics [periodiccnt - 1] = w;	1652	periodics [periodiccnt - 1] = w;
754	upheap ((WT *)periodics, periodiccnt - 1);	1653	upheap ((WT *)periodics, periodiccnt - 1);
755	}
756		1654
		1655	/assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));/
		1656	}
		1657
757	void	1658	void
758	evperiodic_stop (struct ev_periodic *w)	1659	ev_periodic_stop (EV_P_ ev_periodic *w)
759	{	1660	{
760	ev_clear ((W)w);	1661	ev_clear_pending (EV_A_ (W)w);
761	if (!ev_is_active (w))	1662	if (expect_false (!ev_is_active (w)))
762	return;	1663	return;
763		1664
764	if (w->active < periodiccnt--)	1665	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1666
		1667	{
		1668	int active = ((W)w)->active;
		1669
		1670	if (expect_true (--active < --periodiccnt))
765	{	1671	{
766	periodics [w->active - 1] = periodics [periodiccnt];	1672	periodics [active] = periodics [periodiccnt];
767	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1673	adjustheap ((WT *)periodics, periodiccnt, active);
768	}	1674	}
		1675	}
769		1676
770	ev_stop ((W)w);	1677	ev_stop (EV_A_ (W)w);
771	}	1678	}
772		1679
773	void	1680	void
		1681	ev_periodic_again (EV_P_ ev_periodic *w)
		1682	{
		1683	/* TODO: use adjustheap and recalculation */
		1684	ev_periodic_stop (EV_A_ w);
		1685	ev_periodic_start (EV_A_ w);
		1686	}
		1687	#endif
		1688
		1689	#ifndef SA_RESTART
		1690	# define SA_RESTART 0
		1691	#endif
		1692
		1693	void
774	evsignal_start (struct ev_signal *w)	1694	ev_signal_start (EV_P_ ev_signal *w)
775	{	1695	{
		1696	#if EV_MULTIPLICITY
		1697	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1698	#endif
776	if (ev_is_active (w))	1699	if (expect_false (ev_is_active (w)))
777	return;	1700	return;
778		1701
		1702	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1703
779	ev_start ((W)w, 1);	1704	ev_start (EV_A_ (W)w, 1);
780	array_needsize (signals, signalmax, w->signum, signals_init);	1705	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
781	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1706	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
782		1707
783	if (!w->next)	1708	if (!((WL)w)->next)
784	{	1709	{
		1710	#if _WIN32
		1711	signal (w->signum, sighandler);
		1712	#else
785	struct sigaction sa;	1713	struct sigaction sa;
786	sa.sa_handler = sighandler;	1714	sa.sa_handler = sighandler;
787	sigfillset (&sa.sa_mask);	1715	sigfillset (&sa.sa_mask);
788	sa.sa_flags = 0;	1716	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
789	sigaction (w->signum, &sa, 0);	1717	sigaction (w->signum, &sa, 0);
		1718	#endif
790	}	1719	}
791	}	1720	}
792		1721
793	void	1722	void
794	evsignal_stop (struct ev_signal *w)	1723	ev_signal_stop (EV_P_ ev_signal *w)
795	{	1724	{
796	ev_clear ((W)w);	1725	ev_clear_pending (EV_A_ (W)w);
797	if (!ev_is_active (w))	1726	if (expect_false (!ev_is_active (w)))
798	return;	1727	return;
799		1728
800	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1729	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
801	ev_stop ((W)w);	1730	ev_stop (EV_A_ (W)w);
802		1731
803	if (!signals [w->signum - 1].head)	1732	if (!signals [w->signum - 1].head)
804	signal (w->signum, SIG_DFL);	1733	signal (w->signum, SIG_DFL);
805	}	1734	}
806		1735
807	void evidle_start (struct ev_idle *w)	1736	void
		1737	ev_child_start (EV_P_ ev_child *w)
808	{	1738	{
		1739	#if EV_MULTIPLICITY
		1740	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1741	#endif
809	if (ev_is_active (w))	1742	if (expect_false (ev_is_active (w)))
810	return;	1743	return;
811		1744
		1745	ev_start (EV_A_ (W)w, 1);
		1746	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1747	}
		1748
		1749	void
		1750	ev_child_stop (EV_P_ ev_child *w)
		1751	{
		1752	ev_clear_pending (EV_A_ (W)w);
		1753	if (expect_false (!ev_is_active (w)))
		1754	return;
		1755
		1756	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1757	ev_stop (EV_A_ (W)w);
		1758	}
		1759
		1760	#if EV_STAT_ENABLE
		1761
		1762	# ifdef _WIN32
		1763	# undef lstat
		1764	# define lstat(a,b) _stati64 (a,b)
		1765	# endif
		1766
		1767	#define DEF_STAT_INTERVAL 5.0074891
		1768	#define MIN_STAT_INTERVAL 0.1074891
		1769
		1770	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1771
		1772	#if EV_USE_INOTIFY
		1773	# define EV_INOTIFY_BUFSIZE 8192
		1774
		1775	static void noinline
		1776	infy_add (EV_P_ ev_stat *w)
		1777	{
		1778	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);
		1779
		1780	if (w->wd < 0)
		1781	{
		1782	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1783
		1784	/* monitor some parent directory for speedup hints */
		1785	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)
		1786	{
		1787	char path [4096];
		1788	strcpy (path, w->path);
		1789
		1790	do
		1791	{
		1792	int mask = IN_MASK_ADD \| IN_DELETE_SELF \| IN_MOVE_SELF
		1793	\| (errno == EACCES ? IN_ATTRIB : IN_CREATE \| IN_MOVED_TO);
		1794
		1795	char *pend = strrchr (path, '/');
		1796
		1797	if (!pend)
		1798	break; /* whoops, no '/', complain to your admin */
		1799
		1800	*pend = 0;
		1801	w->wd = inotify_add_watch (fs_fd, path, mask);
		1802	}
		1803	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
		1804	}
		1805	}
		1806	else
		1807	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1808
		1809	if (w->wd >= 0)
		1810	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1811	}
		1812
		1813	static void noinline
		1814	infy_del (EV_P_ ev_stat *w)
		1815	{
		1816	int slot;
		1817	int wd = w->wd;
		1818
		1819	if (wd < 0)
		1820	return;
		1821
		1822	w->wd = -2;
		1823	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1824	wlist_del (&fs_hash [slot].head, (WL)w);
		1825
		1826	/* remove this watcher, if others are watching it, they will rearm */
		1827	inotify_rm_watch (fs_fd, wd);
		1828	}
		1829
		1830	static void noinline
		1831	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1832	{
		1833	if (slot < 0)
		1834	/* overflow, need to check for all hahs slots */
		1835	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1836	infy_wd (EV_A_ slot, wd, ev);
		1837	else
		1838	{
		1839	WL w_;
		1840
		1841	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1842	{
		1843	ev_stat w = (ev_stat )w_;
		1844	w_ = w_->next; /* lets us remove this watcher and all before it */
		1845
		1846	if (w->wd == wd \|\| wd == -1)
		1847	{
		1848	if (ev->mask & (IN_IGNORED \| IN_UNMOUNT \| IN_DELETE_SELF))
		1849	{
		1850	w->wd = -1;
		1851	infy_add (EV_A_ w); /* re-add, no matter what */
		1852	}
		1853
		1854	stat_timer_cb (EV_A_ &w->timer, 0);
		1855	}
		1856	}
		1857	}
		1858	}
		1859
		1860	static void
		1861	infy_cb (EV_P_ ev_io *w, int revents)
		1862	{
		1863	char buf [EV_INOTIFY_BUFSIZE];
		1864	struct inotify_event ev = (struct inotify_event )buf;
		1865	int ofs;
		1866	int len = read (fs_fd, buf, sizeof (buf));
		1867
		1868	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1869	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1870	}
		1871
		1872	void inline_size
		1873	infy_init (EV_P)
		1874	{
		1875	if (fs_fd != -2)
		1876	return;
		1877
		1878	fs_fd = inotify_init ();
		1879
		1880	if (fs_fd >= 0)
		1881	{
		1882	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1883	ev_set_priority (&fs_w, EV_MAXPRI);
		1884	ev_io_start (EV_A_ &fs_w);
		1885	}
		1886	}
		1887
		1888	void inline_size
		1889	infy_fork (EV_P)
		1890	{
		1891	int slot;
		1892
		1893	if (fs_fd < 0)
		1894	return;
		1895
		1896	close (fs_fd);
		1897	fs_fd = inotify_init ();
		1898
		1899	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1900	{
		1901	WL w_ = fs_hash [slot].head;
		1902	fs_hash [slot].head = 0;
		1903
		1904	while (w_)
		1905	{
		1906	ev_stat w = (ev_stat )w_;
		1907	w_ = w_->next; /* lets us add this watcher */
		1908
		1909	w->wd = -1;
		1910
		1911	if (fs_fd >= 0)
		1912	infy_add (EV_A_ w); /* re-add, no matter what */
		1913	else
		1914	ev_timer_start (EV_A_ &w->timer);
		1915	}
		1916
		1917	}
		1918	}
		1919
		1920	#endif
		1921
		1922	void
		1923	ev_stat_stat (EV_P_ ev_stat *w)
		1924	{
		1925	if (lstat (w->path, &w->attr) < 0)
		1926	w->attr.st_nlink = 0;
		1927	else if (!w->attr.st_nlink)
		1928	w->attr.st_nlink = 1;
		1929	}
		1930
		1931	static void noinline
		1932	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1933	{
		1934	ev_stat w = (ev_stat )(((char *)w_) - offsetof (ev_stat, timer));
		1935
		1936	/* we copy this here each the time so that */
		1937	/* prev has the old value when the callback gets invoked */
		1938	w->prev = w->attr;
		1939	ev_stat_stat (EV_A_ w);
		1940
		1941	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		1942	if (
		1943	w->prev.st_dev != w->attr.st_dev
		1944	\|\| w->prev.st_ino != w->attr.st_ino
		1945	\|\| w->prev.st_mode != w->attr.st_mode
		1946	\|\| w->prev.st_nlink != w->attr.st_nlink
		1947	\|\| w->prev.st_uid != w->attr.st_uid
		1948	\|\| w->prev.st_gid != w->attr.st_gid
		1949	\|\| w->prev.st_rdev != w->attr.st_rdev
		1950	\|\| w->prev.st_size != w->attr.st_size
		1951	\|\| w->prev.st_atime != w->attr.st_atime
		1952	\|\| w->prev.st_mtime != w->attr.st_mtime
		1953	\|\| w->prev.st_ctime != w->attr.st_ctime
		1954	) {
		1955	#if EV_USE_INOTIFY
		1956	infy_del (EV_A_ w);
		1957	infy_add (EV_A_ w);
		1958	ev_stat_stat (EV_A_ w); /* avoid race... */
		1959	#endif
		1960
		1961	ev_feed_event (EV_A_ w, EV_STAT);
		1962	}
		1963	}
		1964
		1965	void
		1966	ev_stat_start (EV_P_ ev_stat *w)
		1967	{
		1968	if (expect_false (ev_is_active (w)))
		1969	return;
		1970
		1971	/* since we use memcmp, we need to clear any padding data etc. */
		1972	memset (&w->prev, 0, sizeof (ev_statdata));
		1973	memset (&w->attr, 0, sizeof (ev_statdata));
		1974
		1975	ev_stat_stat (EV_A_ w);
		1976
		1977	if (w->interval < MIN_STAT_INTERVAL)
		1978	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		1979
		1980	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		1981	ev_set_priority (&w->timer, ev_priority (w));
		1982
		1983	#if EV_USE_INOTIFY
		1984	infy_init (EV_A);
		1985
		1986	if (fs_fd >= 0)
		1987	infy_add (EV_A_ w);
		1988	else
		1989	#endif
		1990	ev_timer_start (EV_A_ &w->timer);
		1991
		1992	ev_start (EV_A_ (W)w, 1);
		1993	}
		1994
		1995	void
		1996	ev_stat_stop (EV_P_ ev_stat *w)
		1997	{
		1998	ev_clear_pending (EV_A_ (W)w);
		1999	if (expect_false (!ev_is_active (w)))
		2000	return;
		2001
		2002	#if EV_USE_INOTIFY
		2003	infy_del (EV_A_ w);
		2004	#endif
		2005	ev_timer_stop (EV_A_ &w->timer);
		2006
		2007	ev_stop (EV_A_ (W)w);
		2008	}
		2009	#endif
		2010
		2011	void
		2012	ev_idle_start (EV_P_ ev_idle *w)
		2013	{
		2014	if (expect_false (ev_is_active (w)))
		2015	return;
		2016
812	ev_start ((W)w, ++idlecnt);	2017	ev_start (EV_A_ (W)w, ++idlecnt);
813	array_needsize (idles, idlemax, idlecnt, );	2018	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
814	idles [idlecnt - 1] = w;	2019	idles [idlecnt - 1] = w;
815	}	2020	}
816		2021
817	void evidle_stop (struct ev_idle *w)	2022	void
		2023	ev_idle_stop (EV_P_ ev_idle *w)
818	{	2024	{
819	ev_clear ((W)w);	2025	ev_clear_pending (EV_A_ (W)w);
820	if (ev_is_active (w))	2026	if (expect_false (!ev_is_active (w)))
821	return;	2027	return;
822		2028
		2029	{
		2030	int active = ((W)w)->active;
823	idles [w->active - 1] = idles [--idlecnt];	2031	idles [active - 1] = idles [--idlecnt];
		2032	((W)idles [active - 1])->active = active;
		2033	}
		2034
824	ev_stop ((W)w);	2035	ev_stop (EV_A_ (W)w);
825	}	2036	}
826		2037
		2038	void
		2039	ev_prepare_start (EV_P_ ev_prepare *w)
		2040	{
		2041	if (expect_false (ev_is_active (w)))
		2042	return;
		2043
		2044	ev_start (EV_A_ (W)w, ++preparecnt);
		2045	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2046	prepares [preparecnt - 1] = w;
		2047	}
		2048
		2049	void
		2050	ev_prepare_stop (EV_P_ ev_prepare *w)
		2051	{
		2052	ev_clear_pending (EV_A_ (W)w);
		2053	if (expect_false (!ev_is_active (w)))
		2054	return;
		2055
		2056	{
		2057	int active = ((W)w)->active;
		2058	prepares [active - 1] = prepares [--preparecnt];
		2059	((W)prepares [active - 1])->active = active;
		2060	}
		2061
		2062	ev_stop (EV_A_ (W)w);
		2063	}
		2064
		2065	void
827	void evcheck_start (struct ev_check *w)	2066	ev_check_start (EV_P_ ev_check *w)
828	{	2067	{
829	if (ev_is_active (w))	2068	if (expect_false (ev_is_active (w)))
830	return;	2069	return;
831		2070
832	ev_start ((W)w, ++checkcnt);	2071	ev_start (EV_A_ (W)w, ++checkcnt);
833	array_needsize (checks, checkmax, checkcnt, );	2072	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
834	checks [checkcnt - 1] = w;	2073	checks [checkcnt - 1] = w;
835	}	2074	}
836		2075
		2076	void
837	void evcheck_stop (struct ev_check *w)	2077	ev_check_stop (EV_P_ ev_check *w)
838	{	2078	{
839	ev_clear ((W)w);	2079	ev_clear_pending (EV_A_ (W)w);
840	if (ev_is_active (w))	2080	if (expect_false (!ev_is_active (w)))
841	return;	2081	return;
842		2082
		2083	{
		2084	int active = ((W)w)->active;
843	checks [w->active - 1] = checks [--checkcnt];	2085	checks [active - 1] = checks [--checkcnt];
		2086	((W)checks [active - 1])->active = active;
		2087	}
		2088
844	ev_stop ((W)w);	2089	ev_stop (EV_A_ (W)w);
845	}	2090	}
		2091
		2092	#if EV_EMBED_ENABLE
		2093	void noinline
		2094	ev_embed_sweep (EV_P_ ev_embed *w)
		2095	{
		2096	ev_loop (w->loop, EVLOOP_NONBLOCK);
		2097	}
		2098
		2099	static void
		2100	embed_cb (EV_P_ ev_io *io, int revents)
		2101	{
		2102	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
		2103
		2104	if (ev_cb (w))
		2105	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2106	else
		2107	ev_embed_sweep (loop, w);
		2108	}
		2109
		2110	void
		2111	ev_embed_start (EV_P_ ev_embed *w)
		2112	{
		2113	if (expect_false (ev_is_active (w)))
		2114	return;
		2115
		2116	{
		2117	struct ev_loop *loop = w->loop;
		2118	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2119	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		2120	}
		2121
		2122	ev_set_priority (&w->io, ev_priority (w));
		2123	ev_io_start (EV_A_ &w->io);
		2124
		2125	ev_start (EV_A_ (W)w, 1);
		2126	}
		2127
		2128	void
		2129	ev_embed_stop (EV_P_ ev_embed *w)
		2130	{
		2131	ev_clear_pending (EV_A_ (W)w);
		2132	if (expect_false (!ev_is_active (w)))
		2133	return;
		2134
		2135	ev_io_stop (EV_A_ &w->io);
		2136
		2137	ev_stop (EV_A_ (W)w);
		2138	}
		2139	#endif
		2140
		2141	#if EV_FORK_ENABLE
		2142	void
		2143	ev_fork_start (EV_P_ ev_fork *w)
		2144	{
		2145	if (expect_false (ev_is_active (w)))
		2146	return;
		2147
		2148	ev_start (EV_A_ (W)w, ++forkcnt);
		2149	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2150	forks [forkcnt - 1] = w;
		2151	}
		2152
		2153	void
		2154	ev_fork_stop (EV_P_ ev_fork *w)
		2155	{
		2156	ev_clear_pending (EV_A_ (W)w);
		2157	if (expect_false (!ev_is_active (w)))
		2158	return;
		2159
		2160	{
		2161	int active = ((W)w)->active;
		2162	forks [active - 1] = forks [--forkcnt];
		2163	((W)forks [active - 1])->active = active;
		2164	}
		2165
		2166	ev_stop (EV_A_ (W)w);
		2167	}
		2168	#endif
846		2169
847	/*****************************************************************************/	2170	/*****************************************************************************/
848		2171
849	struct ev_once	2172	struct ev_once
850	{	2173	{
851	struct ev_io io;	2174	ev_io io;
852	struct ev_timer to;	2175	ev_timer to;
853	void (cb)(int revents, void arg);	2176	void (cb)(int revents, void arg);
854	void *arg;	2177	void *arg;
855	};	2178	};
856		2179
857	static void	2180	static void
858	once_cb (struct ev_once *once, int revents)	2181	once_cb (EV_P_ struct ev_once *once, int revents)
859	{	2182	{
860	void (cb)(int revents, void arg) = once->cb;	2183	void (cb)(int revents, void arg) = once->cb;
861	void *arg = once->arg;	2184	void *arg = once->arg;
862		2185
863	evio_stop (&once->io);	2186	ev_io_stop (EV_A_ &once->io);
864	evtimer_stop (&once->to);	2187	ev_timer_stop (EV_A_ &once->to);
865	free (once);	2188	ev_free (once);
866		2189
867	cb (revents, arg);	2190	cb (revents, arg);
868	}	2191	}
869		2192
870	static void	2193	static void
871	once_cb_io (struct ev_io *w, int revents)	2194	once_cb_io (EV_P_ ev_io *w, int revents)
872	{	2195	{
873	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	2196	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
874	}	2197	}
875		2198
876	static void	2199	static void
877	once_cb_to (struct ev_timer *w, int revents)	2200	once_cb_to (EV_P_ ev_timer *w, int revents)
878	{	2201	{
879	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	2202	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
880	}	2203	}
881		2204
882	void	2205	void
883	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	2206	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
884	{	2207	{
885	struct ev_once *once = malloc (sizeof (struct ev_once));	2208	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
886		2209
887	if (!once)	2210	if (expect_false (!once))
888	cb (EV_ERROR, arg);	2211	{
889	else	2212	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		2213	return;
890	{	2214	}
		2215
891	once->cb = cb;	2216	once->cb = cb;
892	once->arg = arg;	2217	once->arg = arg;
893		2218
894	evw_init (&once->io, once_cb_io);	2219	ev_init (&once->io, once_cb_io);
895
896	if (fd >= 0)	2220	if (fd >= 0)
897	{	2221	{
898	evio_set (&once->io, fd, events);	2222	ev_io_set (&once->io, fd, events);
899	evio_start (&once->io);	2223	ev_io_start (EV_A_ &once->io);
900	}	2224	}
901		2225
902	evw_init (&once->to, once_cb_to);	2226	ev_init (&once->to, once_cb_to);
903
904	if (timeout >= 0.)	2227	if (timeout >= 0.)
905	{	2228	{
906	evtimer_set (&once->to, timeout, 0.);	2229	ev_timer_set (&once->to, timeout, 0.);
907	evtimer_start (&once->to);	2230	ev_timer_start (EV_A_ &once->to);
908	}
909	}
910	}
911
912	/*****************************************************************************/
913
914	#if 0
915
916	struct ev_io wio;
917
918	static void
919	sin_cb (struct ev_io *w, int revents)
920	{
921	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
922	}
923
924	static void
925	ocb (struct ev_timer *w, int revents)
926	{
927	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
928	evtimer_stop (w);
929	evtimer_start (w);
930	}
931
932	static void
933	scb (struct ev_signal *w, int revents)
934	{
935	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
936	evio_stop (&wio);
937	evio_start (&wio);
938	}
939
940	static void
941	gcb (struct ev_signal *w, int revents)
942	{
943	fprintf (stderr, "generic %x\n", revents);
944
945	}
946
947	int main (void)
948	{
949	ev_init (0);
950
951	evio_init (&wio, sin_cb, 0, EV_READ);
952	evio_start (&wio);
953
954	struct ev_timer t[10000];
955
956	#if 0
957	int i;
958	for (i = 0; i < 10000; ++i)
959	{	2231	}
960	struct ev_timer *w = t + i;
961	evw_init (w, ocb, i);
962	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
963	evtimer_start (w);
964	if (drand48 () < 0.5)
965	evtimer_stop (w);
966	}
967	#endif
968
969	struct ev_timer t1;
970	evtimer_init (&t1, ocb, 5, 10);
971	evtimer_start (&t1);
972
973	struct ev_signal sig;
974	evsignal_init (&sig, scb, SIGQUIT);
975	evsignal_start (&sig);
976
977	struct ev_check cw;
978	evcheck_init (&cw, gcb);
979	evcheck_start (&cw);
980
981	struct ev_idle iw;
982	evidle_init (&iw, gcb);
983	evidle_start (&iw);
984
985	ev_loop (0);
986
987	return 0;
988	}	2232	}
989		2233
		2234	#ifdef __cplusplus
		2235	}
990	#endif	2236	#endif
991		2237
992
993
994

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Comparing libev/ev.c (file contents): Revision 1.18 by root, Wed Oct 31 16:29:52 2007 UTC vs. Revision 1.163 by root, Wed Dec 5 13:54:36 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.18 by root, Wed Oct 31 16:29:52 2007 UTC vs.
Revision 1.163 by root, Wed Dec 5 13:54:36 2007 UTC