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Comparing libev/ev.c (file contents):
Revision 1.40 by root, Fri Nov 2 11:02:23 2007 UTC vs.
Revision 1.152 by root, Wed Nov 28 11:15:55 2007 UTC

…		…
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30	*/	30	*/
		31
		32	#ifdef __cplusplus
		33	extern "C" {
		34	#endif
		35
		36	#ifndef EV_STANDALONE
31	#if EV_USE_CONFIG_H	37	# ifdef EV_CONFIG_H
		38	# include EV_CONFIG_H
		39	# else
32	# include "config.h"	40	# include "config.h"
		41	# endif
		42
		43	# if HAVE_CLOCK_GETTIME
		44	# ifndef EV_USE_MONOTONIC
		45	# define EV_USE_MONOTONIC 1
		46	# endif
		47	# ifndef EV_USE_REALTIME
		48	# define EV_USE_REALTIME 1
		49	# endif
		50	# else
		51	# ifndef EV_USE_MONOTONIC
		52	# define EV_USE_MONOTONIC 0
		53	# endif
		54	# ifndef EV_USE_REALTIME
		55	# define EV_USE_REALTIME 0
		56	# endif
		57	# endif
		58
		59	# ifndef EV_USE_SELECT
		60	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		61	# define EV_USE_SELECT 1
		62	# else
		63	# define EV_USE_SELECT 0
		64	# endif
		65	# endif
		66
		67	# ifndef EV_USE_POLL
		68	# if HAVE_POLL && HAVE_POLL_H
		69	# define EV_USE_POLL 1
		70	# else
		71	# define EV_USE_POLL 0
		72	# endif
		73	# endif
		74
		75	# ifndef EV_USE_EPOLL
		76	# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		77	# define EV_USE_EPOLL 1
		78	# else
		79	# define EV_USE_EPOLL 0
		80	# endif
		81	# endif
		82
		83	# ifndef EV_USE_KQUEUE
		84	# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		85	# define EV_USE_KQUEUE 1
		86	# else
		87	# define EV_USE_KQUEUE 0
		88	# endif
		89	# endif
		90
		91	# ifndef EV_USE_PORT
		92	# if HAVE_PORT_H && HAVE_PORT_CREATE
		93	# define EV_USE_PORT 1
		94	# else
		95	# define EV_USE_PORT 0
		96	# endif
		97	# endif
		98
		99	# ifndef EV_USE_INOTIFY
		100	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		101	# define EV_USE_INOTIFY 1
		102	# else
		103	# define EV_USE_INOTIFY 0
		104	# endif
		105	# endif
		106
33	#endif	107	#endif
34		108
35	#include <math.h>	109	#include <math.h>
36	#include <stdlib.h>	110	#include <stdlib.h>
37	#include <unistd.h>
38	#include <fcntl.h>	111	#include <fcntl.h>
39	#include <signal.h>
40	#include <stddef.h>	112	#include <stddef.h>
41		113
42	#include <stdio.h>	114	#include <stdio.h>
43		115
44	#include <assert.h>	116	#include <assert.h>
45	#include <errno.h>	117	#include <errno.h>
46	#include <sys/types.h>	118	#include <sys/types.h>
47	#include <sys/wait.h>
48	#include <sys/time.h>
49	#include <time.h>	119	#include <time.h>
50		120
		121	#include <signal.h>
		122
		123	#ifdef EV_H
		124	# include EV_H
		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
		138	# endif
		139	#endif
		140
51	/**/	141	/**/
52		142
53	#ifndef EV_USE_MONOTONIC	143	#ifndef EV_USE_MONOTONIC
54	# define EV_USE_MONOTONIC 1	144	# define EV_USE_MONOTONIC 0
		145	#endif
		146
		147	#ifndef EV_USE_REALTIME
		148	# define EV_USE_REALTIME 0
55	#endif	149	#endif
56		150
57	#ifndef EV_USE_SELECT	151	#ifndef EV_USE_SELECT
58	# define EV_USE_SELECT 1	152	# define EV_USE_SELECT 1
59	#endif	153	#endif
60		154
		155	#ifndef EV_USE_POLL
		156	# ifdef _WIN32
		157	# define EV_USE_POLL 0
		158	# else
		159	# define EV_USE_POLL 1
		160	# endif
		161	#endif
		162
61	#ifndef EV_USE_EPOLL	163	#ifndef EV_USE_EPOLL
62	# define EV_USE_EPOLL 0	164	# define EV_USE_EPOLL 0
63	#endif	165	#endif
64		166
		167	#ifndef EV_USE_KQUEUE
		168	# define EV_USE_KQUEUE 0
		169	#endif
		170
65	#ifndef EV_USE_REALTIME	171	#ifndef EV_USE_PORT
66	# define EV_USE_REALTIME 1	172	# define EV_USE_PORT 0
		173	#endif
		174
		175	#ifndef EV_USE_INOTIFY
		176	# define EV_USE_INOTIFY 0
		177	#endif
		178
		179	#ifndef EV_PID_HASHSIZE
		180	# if EV_MINIMAL
		181	# define EV_PID_HASHSIZE 1
		182	# else
		183	# define EV_PID_HASHSIZE 16
		184	# endif
		185	#endif
		186
		187	#ifndef EV_INOTIFY_HASHSIZE
		188	# if EV_MINIMAL
		189	# define EV_INOTIFY_HASHSIZE 1
		190	# else
		191	# define EV_INOTIFY_HASHSIZE 16
		192	# endif
67	#endif	193	#endif
68		194
69	/**/	195	/**/
70		196
71	#ifndef CLOCK_MONOTONIC	197	#ifndef CLOCK_MONOTONIC
…		…
76	#ifndef CLOCK_REALTIME	202	#ifndef CLOCK_REALTIME
77	# undef EV_USE_REALTIME	203	# undef EV_USE_REALTIME
78	# define EV_USE_REALTIME 0	204	# define EV_USE_REALTIME 0
79	#endif	205	#endif
80		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
81	/**/	219	/**/
82		220
83	#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) */
84	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */	222	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
85	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
86	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */	223	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
87
88	#include "ev.h"
89		224
90	#if __GNUC__ >= 3	225	#if __GNUC__ >= 3
91	# define expect(expr,value) __builtin_expect ((expr),(value))	226	# define expect(expr,value) __builtin_expect ((expr),(value))
		227	# define inline_size static inline /* inline for codesize */
		228	# if EV_MINIMAL
92	# define inline inline	229	# define noinline __attribute__ ((noinline))
		230	# define inline_speed static noinline
		231	# else
		232	# define noinline
		233	# define inline_speed static inline
		234	# endif
93	#else	235	#else
94	# define expect(expr,value) (expr)	236	# define expect(expr,value) (expr)
		237	# define inline_speed static
95	# define inline static	238	# define inline_size static
		239	# define noinline
96	#endif	240	#endif
97		241
98	#define expect_false(expr) expect ((expr) != 0, 0)	242	#define expect_false(expr) expect ((expr) != 0, 0)
99	#define expect_true(expr) expect ((expr) != 0, 1)	243	#define expect_true(expr) expect ((expr) != 0, 1)
100		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
101	typedef struct ev_watcher *W;	251	typedef ev_watcher *W;
102	typedef struct ev_watcher_list *WL;	252	typedef ev_watcher_list *WL;
103	typedef struct ev_watcher_time *WT;	253	typedef ev_watcher_time *WT;
104		254
105	static ev_tstamp now_floor, 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, size_t size) = realloc;
		287
		288	void
		289	ev_set_allocator (void *(*cb)(void *ptr, size_t size))
		290	{
		291	alloc = cb;
		292	}
		293
		294	inline_speed void *
		295	ev_realloc (void *ptr, size_t size)
		296	{
		297	ptr = alloc (ptr, size);
		298
		299	if (!ptr && size)
		300	{
		301	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", (long)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	typedef struct
		330	{
		331	#if EV_USE_INOTIFY
		332	WL head;
		333	#endif
		334	} ANFS;
		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
106	ev_tstamp ev_now;	353	ev_tstamp ev_rt_now;
107	int ev_method;	354	#define VAR(name,decl) static decl;
		355	#include "ev_vars.h"
		356	#undef VAR
108		357
109	static int have_monotonic; /* runtime */	358	static int ev_default_loop_ptr;
110		359
111	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	360	#endif
112	static void (*method_modify)(int fd, int oev, int nev);
113	static void (*method_poll)(ev_tstamp timeout);
114		361
115	/*****************************************************************************/	362	/*****************************************************************************/
116		363
117	ev_tstamp	364	ev_tstamp
118	ev_time (void)	365	ev_time (void)
…		…
126	gettimeofday (&tv, 0);	373	gettimeofday (&tv, 0);
127	return tv.tv_sec + tv.tv_usec * 1e-6;	374	return tv.tv_sec + tv.tv_usec * 1e-6;
128	#endif	375	#endif
129	}	376	}
130		377
131	static ev_tstamp	378	ev_tstamp inline_size
132	get_clock (void)	379	get_clock (void)
133	{	380	{
134	#if EV_USE_MONOTONIC	381	#if EV_USE_MONOTONIC
135	if (expect_true (have_monotonic))	382	if (expect_true (have_monotonic))
136	{	383	{
…		…
141	#endif	388	#endif
142		389
143	return ev_time ();	390	return ev_time ();
144	}	391	}
145		392
		393	#if EV_MULTIPLICITY
		394	ev_tstamp
		395	ev_now (EV_P)
		396	{
		397	return ev_rt_now;
		398	}
		399	#endif
		400
146	#define array_roundsize(base,n) ((n) | 4 & ~3)	401	#define array_roundsize(type,n) (((n) | 4) & ~3)
147		402
148	#define array_needsize(base,cur,cnt,init) \	403	#define array_needsize(type,base,cur,cnt,init) \
149	if (expect_false ((cnt) > cur)) \	404	if (expect_false ((cnt) > cur)) \
150	{ \	405	{ \
151	int newcnt = cur; \	406	int newcnt = cur; \
152	do \	407	do \
153	{ \	408	{ \
154	newcnt = array_roundsize (base, newcnt << 1); \	409	newcnt = array_roundsize (type, newcnt << 1); \
155	} \	410	} \
156	while ((cnt) > newcnt); \	411	while ((cnt) > newcnt); \
157	\	412	\
158	base = realloc (base, sizeof (*base) * (newcnt)); \	413	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
159	init (base + cur, newcnt - cur); \	414	init (base + cur, newcnt - cur); \
160	cur = newcnt; \	415	cur = newcnt; \
161	}	416	}
		417
		418	#define array_slim(type,stem) \
		419	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		420	{ \
		421	stem ## max = array_roundsize (stem ## cnt >> 1); \
		422	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		423	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		424	}
		425
		426	#define array_free(stem, idx) \
		427	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
162		428
163	/*****************************************************************************/	429	/*****************************************************************************/
164		430
165	typedef struct	431	void noinline
		432	ev_feed_event (EV_P_ void *w, int revents)
166	{	433	{
167	struct ev_io *head;	434	W w_ = (W)w;
168	unsigned char events;
169	unsigned char reify;
170	} ANFD;
171		435
172	static ANFD *anfds;	436	if (expect_false (w_->pending))
173	static int anfdmax;	437	{
		438	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		439	return;
		440	}
174		441
175	static void	442	w_->pending = ++pendingcnt [ABSPRI (w_)];
		443	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		444	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		445	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		446	}
		447
		448	void inline_size
		449	queue_events (EV_P_ W *events, int eventcnt, int type)
		450	{
		451	int i;
		452
		453	for (i = 0; i < eventcnt; ++i)
		454	ev_feed_event (EV_A_ events [i], type);
		455	}
		456
		457	/*****************************************************************************/
		458
		459	void inline_size
176	anfds_init (ANFD *base, int count)	460	anfds_init (ANFD *base, int count)
177	{	461	{
178	while (count--)	462	while (count--)
179	{	463	{
180	base->head = 0;	464	base->head = 0;
…		…
183		467
184	++base;	468	++base;
185	}	469	}
186	}	470	}
187		471
188	typedef struct	472	void inline_speed
189	{
190	W w;
191	int events;
192	} ANPENDING;
193
194	static ANPENDING *pendings;
195	static int pendingmax, pendingcnt;
196
197	static void
198	event (W w, int events)
199	{
200	if (w->pending)
201	{
202	pendings [w->pending - 1].events |= events;
203	return;
204	}
205
206	w->pending = ++pendingcnt;
207	array_needsize (pendings, pendingmax, pendingcnt, );
208	pendings [pendingcnt - 1].w = w;
209	pendings [pendingcnt - 1].events = events;
210	}
211
212	static void
213	queue_events (W *events, int eventcnt, int type)
214	{
215	int i;
216
217	for (i = 0; i < eventcnt; ++i)
218	event (events [i], type);
219	}
220
221	static void
222	fd_event (int fd, int events)	473	fd_event (EV_P_ int fd, int revents)
223	{	474	{
224	ANFD *anfd = anfds + fd;	475	ANFD *anfd = anfds + fd;
225	struct ev_io *w;	476	ev_io *w;
226		477
227	for (w = anfd->head; w; w = w->next)	478	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
228	{	479	{
229	int ev = w->events & events;	480	int ev = w->events & revents;
230		481
231	if (ev)	482	if (ev)
232	event ((W)w, ev);	483	ev_feed_event (EV_A_ (W)w, ev);
233	}	484	}
234	}	485	}
235		486
236	/*****************************************************************************/	487	void
		488	ev_feed_fd_event (EV_P_ int fd, int revents)
		489	{
		490	fd_event (EV_A_ fd, revents);
		491	}
237		492
238	static int *fdchanges;	493	void inline_size
239	static int fdchangemax, fdchangecnt;	494	fd_reify (EV_P)
240
241	static void
242	fd_reify (void)
243	{	495	{
244	int i;	496	int i;
245		497
246	for (i = 0; i < fdchangecnt; ++i)	498	for (i = 0; i < fdchangecnt; ++i)
247	{	499	{
248	int fd = fdchanges [i];	500	int fd = fdchanges [i];
249	ANFD *anfd = anfds + fd;	501	ANFD *anfd = anfds + fd;
250	struct ev_io *w;	502	ev_io *w;
251		503
252	int events = 0;	504	int events = 0;
253		505
254	for (w = anfd->head; w; w = w->next)	506	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
255	events |= w->events;	507	events |= w->events;
256		508
		509	#if EV_SELECT_IS_WINSOCKET
		510	if (events)
		511	{
		512	unsigned long argp;
		513	anfd->handle = _get_osfhandle (fd);
		514	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		515	}
		516	#endif
		517
257	anfd->reify = 0;	518	anfd->reify = 0;
258		519
259	if (anfd->events != events)
260	{
261	method_modify (fd, anfd->events, events);	520	backend_modify (EV_A_ fd, anfd->events, events);
262	anfd->events = events;	521	anfd->events = events;
263	}
264	}	522	}
265		523
266	fdchangecnt = 0;	524	fdchangecnt = 0;
267	}	525	}
268		526
269	static void	527	void inline_size
270	fd_change (int fd)	528	fd_change (EV_P_ int fd)
271	{	529	{
272	if (anfds [fd].reify || fdchangecnt < 0)	530	if (expect_false (anfds [fd].reify))
273	return;	531	return;
274		532
275	anfds [fd].reify = 1;	533	anfds [fd].reify = 1;
276		534
277	++fdchangecnt;	535	++fdchangecnt;
278	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	536	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
279	fdchanges [fdchangecnt - 1] = fd;	537	fdchanges [fdchangecnt - 1] = fd;
280	}	538	}
281		539
		540	void inline_speed
		541	fd_kill (EV_P_ int fd)
		542	{
		543	ev_io *w;
		544
		545	while ((w = (ev_io *)anfds [fd].head))
		546	{
		547	ev_io_stop (EV_A_ w);
		548	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		549	}
		550	}
		551
		552	int inline_size
		553	fd_valid (int fd)
		554	{
		555	#ifdef _WIN32
		556	return _get_osfhandle (fd) != -1;
		557	#else
		558	return fcntl (fd, F_GETFD) != -1;
		559	#endif
		560	}
		561
282	/* called on EBADF to verify fds */	562	/* called on EBADF to verify fds */
283	static void	563	static void noinline
284	fd_recheck (void)	564	fd_ebadf (EV_P)
285	{	565	{
286	int fd;	566	int fd;
287		567
288	for (fd = 0; fd < anfdmax; ++fd)	568	for (fd = 0; fd < anfdmax; ++fd)
289	if (anfds [fd].events)	569	if (anfds [fd].events)
290	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	570	if (!fd_valid (fd) == -1 && errno == EBADF)
291	while (anfds [fd].head)	571	fd_kill (EV_A_ fd);
		572	}
		573
		574	/* called on ENOMEM in select/poll to kill some fds and retry */
		575	static void noinline
		576	fd_enomem (EV_P)
		577	{
		578	int fd;
		579
		580	for (fd = anfdmax; fd--; )
		581	if (anfds [fd].events)
292	{	582	{
293	ev_io_stop (anfds [fd].head);	583	fd_kill (EV_A_ fd);
294	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	584	return;
295	}	585	}
		586	}
		587
		588	/* usually called after fork if backend needs to re-arm all fds from scratch */
		589	static void noinline
		590	fd_rearm_all (EV_P)
		591	{
		592	int fd;
		593
		594	/* this should be highly optimised to not do anything but set a flag */
		595	for (fd = 0; fd < anfdmax; ++fd)
		596	if (anfds [fd].events)
		597	{
		598	anfds [fd].events = 0;
		599	fd_change (EV_A_ fd);
		600	}
296	}	601	}
297		602
298	/*****************************************************************************/	603	/*****************************************************************************/
299		604
300	static struct ev_timer **timers;	605	void inline_speed
301	static int timermax, timercnt;
302
303	static struct ev_periodic **periodics;
304	static int periodicmax, periodiccnt;
305
306	static void
307	upheap (WT *timers, int k)	606	upheap (WT *heap, int k)
308	{	607	{
309	WT w = timers [k];	608	WT w = heap [k];
310		609
311	while (k && timers [k >> 1]->at > w->at)	610	while (k && heap [k >> 1]->at > w->at)
312	{	611	{
313	timers [k] = timers [k >> 1];	612	heap [k] = heap [k >> 1];
314	timers [k]->active = k + 1;	613	((W)heap [k])->active = k + 1;
315	k >>= 1;	614	k >>= 1;
316	}	615	}
317		616
318	timers [k] = w;	617	heap [k] = w;
319	timers [k]->active = k + 1;	618	((W)heap [k])->active = k + 1;
320		619
321	}	620	}
322		621
323	static void	622	void inline_speed
324	downheap (WT *timers, int N, int k)	623	downheap (WT *heap, int N, int k)
325	{	624	{
326	WT w = timers [k];	625	WT w = heap [k];
327		626
328	while (k < (N >> 1))	627	while (k < (N >> 1))
329	{	628	{
330	int j = k << 1;	629	int j = k << 1;
331		630
332	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	631	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
333	++j;	632	++j;
334		633
335	if (w->at <= timers [j]->at)	634	if (w->at <= heap [j]->at)
336	break;	635	break;
337		636
338	timers [k] = timers [j];	637	heap [k] = heap [j];
339	timers [k]->active = k + 1;	638	((W)heap [k])->active = k + 1;
340	k = j;	639	k = j;
341	}	640	}
342		641
343	timers [k] = w;	642	heap [k] = w;
344	timers [k]->active = k + 1;	643	((W)heap [k])->active = k + 1;
		644	}
		645
		646	void inline_size
		647	adjustheap (WT *heap, int N, int k)
		648	{
		649	upheap (heap, k);
		650	downheap (heap, N, k);
345	}	651	}
346		652
347	/*****************************************************************************/	653	/*****************************************************************************/
348		654
349	typedef struct	655	typedef struct
350	{	656	{
351	struct ev_signal *head;	657	WL head;
352	sig_atomic_t volatile gotsig;	658	sig_atomic_t volatile gotsig;
353	} ANSIG;	659	} ANSIG;
354		660
355	static ANSIG *signals;	661	static ANSIG *signals;
356	static int signalmax;	662	static int signalmax;
357		663
358	static int sigpipe [2];	664	static int sigpipe [2];
359	static sig_atomic_t volatile gotsig;	665	static sig_atomic_t volatile gotsig;
360	static struct ev_io sigev;	666	static ev_io sigev;
361		667
362	static void	668	void inline_size
363	signals_init (ANSIG *base, int count)	669	signals_init (ANSIG *base, int count)
364	{	670	{
365	while (count--)	671	while (count--)
366	{	672	{
367	base->head = 0;	673	base->head = 0;
…		…
372	}	678	}
373		679
374	static void	680	static void
375	sighandler (int signum)	681	sighandler (int signum)
376	{	682	{
		683	#if _WIN32
		684	signal (signum, sighandler);
		685	#endif
		686
377	signals [signum - 1].gotsig = 1;	687	signals [signum - 1].gotsig = 1;
378		688
379	if (!gotsig)	689	if (!gotsig)
380	{	690	{
		691	int old_errno = errno;
381	gotsig = 1;	692	gotsig = 1;
382	write (sigpipe [1], &signum, 1);	693	write (sigpipe [1], &signum, 1);
		694	errno = old_errno;
383	}	695	}
		696	}
		697
		698	void noinline
		699	ev_feed_signal_event (EV_P_ int signum)
		700	{
		701	WL w;
		702
		703	#if EV_MULTIPLICITY
		704	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		705	#endif
		706
		707	--signum;
		708
		709	if (signum < 0 || signum >= signalmax)
		710	return;
		711
		712	signals [signum].gotsig = 0;
		713
		714	for (w = signals [signum].head; w; w = w->next)
		715	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
384	}	716	}
385		717
386	static void	718	static void
387	sigcb (struct ev_io *iow, int revents)	719	sigcb (EV_P_ ev_io *iow, int revents)
388	{	720	{
389	struct ev_signal *w;
390	int signum;	721	int signum;
391		722
392	read (sigpipe [0], &revents, 1);	723	read (sigpipe [0], &revents, 1);
393	gotsig = 0;	724	gotsig = 0;
394		725
395	for (signum = signalmax; signum--; )	726	for (signum = signalmax; signum--; )
396	if (signals [signum].gotsig)	727	if (signals [signum].gotsig)
		728	ev_feed_signal_event (EV_A_ signum + 1);
		729	}
		730
		731	void inline_size
		732	fd_intern (int fd)
		733	{
		734	#ifdef _WIN32
		735	int arg = 1;
		736	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		737	#else
		738	fcntl (fd, F_SETFD, FD_CLOEXEC);
		739	fcntl (fd, F_SETFL, O_NONBLOCK);
		740	#endif
		741	}
		742
		743	static void noinline
		744	siginit (EV_P)
		745	{
		746	fd_intern (sigpipe [0]);
		747	fd_intern (sigpipe [1]);
		748
		749	ev_io_set (&sigev, sigpipe [0], EV_READ);
		750	ev_io_start (EV_A_ &sigev);
		751	ev_unref (EV_A); /* child watcher should not keep loop alive */
		752	}
		753
		754	/*****************************************************************************/
		755
		756	static ev_child *childs [EV_PID_HASHSIZE];
		757
		758	#ifndef _WIN32
		759
		760	static ev_signal childev;
		761
		762	void inline_speed
		763	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		764	{
		765	ev_child *w;
		766
		767	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		768	if (w->pid == pid || !w->pid)
397	{	769	{
398	signals [signum].gotsig = 0;	770	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
399		771	w->rpid = pid;
400	for (w = signals [signum].head; w; w = w->next)	772	w->rstatus = status;
401	event ((W)w, EV_SIGNAL);	773	ev_feed_event (EV_A_ (W)w, EV_CHILD);
402	}	774	}
403	}	775	}
404
405	static void
406	siginit (void)
407	{
408	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
409	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
410
411	/* rather than sort out wether we really need nb, set it */
412	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
413	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
414
415	ev_io_set (&sigev, sigpipe [0], EV_READ);
416	ev_io_start (&sigev);
417	}
418
419	/*****************************************************************************/
420
421	static struct ev_idle **idles;
422	static int idlemax, idlecnt;
423
424	static struct ev_prepare **prepares;
425	static int preparemax, preparecnt;
426
427	static struct ev_check **checks;
428	static int checkmax, checkcnt;
429
430	/*****************************************************************************/
431
432	static struct ev_child *childs [PID_HASHSIZE];
433	static struct ev_signal childev;
434		776
435	#ifndef WCONTINUED	777	#ifndef WCONTINUED
436	# define WCONTINUED 0	778	# define WCONTINUED 0
437	#endif	779	#endif
438		780
439	static void	781	static void
440	childcb (struct ev_signal *sw, int revents)	782	childcb (EV_P_ ev_signal *sw, int revents)
441	{	783	{
442	struct ev_child *w;
443	int pid, status;	784	int pid, status;
444		785
		786	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
445	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	787	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
446	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	788	if (!WCONTINUED
447	if (w->pid == pid || !w->pid)	789	|| errno != EINVAL
448	{	790	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
449	w->status = status;	791	return;
450	event ((W)w, EV_CHILD);	792
451	}	793	/* make sure we are called again until all childs have been reaped */
		794	/* we need to do it this way so that the callback gets called before we continue */
		795	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		796
		797	child_reap (EV_A_ sw, pid, pid, status);
		798	if (EV_PID_HASHSIZE > 1)
		799	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
452	}	800	}
		801
		802	#endif
453		803
454	/*****************************************************************************/	804	/*****************************************************************************/
455		805
		806	#if EV_USE_PORT
		807	# include "ev_port.c"
		808	#endif
		809	#if EV_USE_KQUEUE
		810	# include "ev_kqueue.c"
		811	#endif
456	#if EV_USE_EPOLL	812	#if EV_USE_EPOLL
457	# include "ev_epoll.c"	813	# include "ev_epoll.c"
458	#endif	814	#endif
		815	#if EV_USE_POLL
		816	# include "ev_poll.c"
		817	#endif
459	#if EV_USE_SELECT	818	#if EV_USE_SELECT
460	# include "ev_select.c"	819	# include "ev_select.c"
461	#endif	820	#endif
462		821
463	int	822	int
…		…
470	ev_version_minor (void)	829	ev_version_minor (void)
471	{	830	{
472	return EV_VERSION_MINOR;	831	return EV_VERSION_MINOR;
473	}	832	}
474		833
475	int ev_init (int flags)	834	/* return true if we are running with elevated privileges and should ignore env variables */
		835	int inline_size
		836	enable_secure (void)
476	{	837	{
477	if (!ev_method)	838	#ifdef _WIN32
		839	return 0;
		840	#else
		841	return getuid () != geteuid ()
		842	|| getgid () != getegid ();
		843	#endif
		844	}
		845
		846	unsigned int
		847	ev_supported_backends (void)
		848	{
		849	unsigned int flags = 0;
		850
		851	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		852	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		853	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		854	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		855	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		856
		857	return flags;
		858	}
		859
		860	unsigned int
		861	ev_recommended_backends (void)
		862	{
		863	unsigned int flags = ev_supported_backends ();
		864
		865	#ifndef __NetBSD__
		866	/* kqueue is borked on everything but netbsd apparently */
		867	/* it usually doesn't work correctly on anything but sockets and pipes */
		868	flags &= ~EVBACKEND_KQUEUE;
		869	#endif
		870	#ifdef __APPLE__
		871	// flags &= ~EVBACKEND_KQUEUE; for documentation
		872	flags &= ~EVBACKEND_POLL;
		873	#endif
		874
		875	return flags;
		876	}
		877
		878	unsigned int
		879	ev_embeddable_backends (void)
		880	{
		881	return EVBACKEND_EPOLL
		882	| EVBACKEND_KQUEUE
		883	| EVBACKEND_PORT;
		884	}
		885
		886	unsigned int
		887	ev_backend (EV_P)
		888	{
		889	return backend;
		890	}
		891
		892	static void noinline
		893	loop_init (EV_P_ unsigned int flags)
		894	{
		895	if (!backend)
478	{	896	{
479	#if EV_USE_MONOTONIC	897	#if EV_USE_MONOTONIC
480	{	898	{
481	struct timespec ts;	899	struct timespec ts;
482	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	900	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
483	have_monotonic = 1;	901	have_monotonic = 1;
484	}	902	}
485	#endif	903	#endif
486		904
487	ev_now = ev_time ();	905	ev_rt_now = ev_time ();
488	now = get_clock ();	906	mn_now = get_clock ();
489	now_floor = now;	907	now_floor = mn_now;
490	diff = ev_now - now;	908	rtmn_diff = ev_rt_now - mn_now;
491		909
492	if (pipe (sigpipe))	910	if (!(flags & EVFLAG_NOENV)
493	return 0;	911	&& !enable_secure ()
		912	&& getenv ("LIBEV_FLAGS"))
		913	flags = atoi (getenv ("LIBEV_FLAGS"));
494		914
495	ev_method = EVMETHOD_NONE;	915	if (!(flags & 0x0000ffffUL))
		916	flags |= ev_recommended_backends ();
		917
		918	backend = 0;
		919	backend_fd = -1;
		920	#if EV_USE_INOTIFY
		921	fs_fd = -2;
		922	#endif
		923
		924	#if EV_USE_PORT
		925	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		926	#endif
		927	#if EV_USE_KQUEUE
		928	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		929	#endif
496	#if EV_USE_EPOLL	930	#if EV_USE_EPOLL
497	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	931	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		932	#endif
		933	#if EV_USE_POLL
		934	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
498	#endif	935	#endif
499	#if EV_USE_SELECT	936	#if EV_USE_SELECT
500	if (ev_method == EVMETHOD_NONE) select_init (flags);	937	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
501	#endif	938	#endif
502		939
503	if (ev_method)	940	ev_init (&sigev, sigcb);
		941	ev_set_priority (&sigev, EV_MAXPRI);
		942	}
		943	}
		944
		945	static void noinline
		946	loop_destroy (EV_P)
		947	{
		948	int i;
		949
		950	#if EV_USE_INOTIFY
		951	if (fs_fd >= 0)
		952	close (fs_fd);
		953	#endif
		954
		955	if (backend_fd >= 0)
		956	close (backend_fd);
		957
		958	#if EV_USE_PORT
		959	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		960	#endif
		961	#if EV_USE_KQUEUE
		962	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		963	#endif
		964	#if EV_USE_EPOLL
		965	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		966	#endif
		967	#if EV_USE_POLL
		968	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		969	#endif
		970	#if EV_USE_SELECT
		971	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		972	#endif
		973
		974	for (i = NUMPRI; i--; )
		975	array_free (pending, [i]);
		976
		977	/* have to use the microsoft-never-gets-it-right macro */
		978	array_free (fdchange, EMPTY0);
		979	array_free (timer, EMPTY0);
		980	#if EV_PERIODIC_ENABLE
		981	array_free (periodic, EMPTY0);
		982	#endif
		983	array_free (idle, EMPTY0);
		984	array_free (prepare, EMPTY0);
		985	array_free (check, EMPTY0);
		986
		987	backend = 0;
		988	}
		989
		990	void inline_size
		991	loop_fork (EV_P)
		992	{
		993	#if EV_USE_PORT
		994	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		995	#endif
		996	#if EV_USE_KQUEUE
		997	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		998	#endif
		999	#if EV_USE_EPOLL
		1000	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1001	#endif
		1002
		1003	if (ev_is_active (&sigev))
		1004	{
		1005	/* default loop */
		1006
		1007	ev_ref (EV_A);
		1008	ev_io_stop (EV_A_ &sigev);
		1009	close (sigpipe [0]);
		1010	close (sigpipe [1]);
		1011
		1012	while (pipe (sigpipe))
		1013	syserr ("(libev) error creating pipe");
		1014
		1015	siginit (EV_A);
		1016	}
		1017
		1018	postfork = 0;
		1019	}
		1020
		1021	#if EV_MULTIPLICITY
		1022	struct ev_loop *
		1023	ev_loop_new (unsigned int flags)
		1024	{
		1025	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		1026
		1027	memset (loop, 0, sizeof (struct ev_loop));
		1028
		1029	loop_init (EV_A_ flags);
		1030
		1031	if (ev_backend (EV_A))
		1032	return loop;
		1033
		1034	return 0;
		1035	}
		1036
		1037	void
		1038	ev_loop_destroy (EV_P)
		1039	{
		1040	loop_destroy (EV_A);
		1041	ev_free (loop);
		1042	}
		1043
		1044	void
		1045	ev_loop_fork (EV_P)
		1046	{
		1047	postfork = 1;
		1048	}
		1049
		1050	#endif
		1051
		1052	#if EV_MULTIPLICITY
		1053	struct ev_loop *
		1054	ev_default_loop_init (unsigned int flags)
		1055	#else
		1056	int
		1057	ev_default_loop (unsigned int flags)
		1058	#endif
		1059	{
		1060	if (sigpipe [0] == sigpipe [1])
		1061	if (pipe (sigpipe))
		1062	return 0;
		1063
		1064	if (!ev_default_loop_ptr)
		1065	{
		1066	#if EV_MULTIPLICITY
		1067	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1068	#else
		1069	ev_default_loop_ptr = 1;
		1070	#endif
		1071
		1072	loop_init (EV_A_ flags);
		1073
		1074	if (ev_backend (EV_A))
504	{	1075	{
505	ev_watcher_init (&sigev, sigcb);
506	siginit ();	1076	siginit (EV_A);
507		1077
		1078	#ifndef _WIN32
508	ev_signal_init (&childev, childcb, SIGCHLD);	1079	ev_signal_init (&childev, childcb, SIGCHLD);
		1080	ev_set_priority (&childev, EV_MAXPRI);
509	ev_signal_start (&childev);	1081	ev_signal_start (EV_A_ &childev);
		1082	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1083	#endif
510	}	1084	}
		1085	else
		1086	ev_default_loop_ptr = 0;
511	}	1087	}
512		1088
513	return ev_method;	1089	return ev_default_loop_ptr;
		1090	}
		1091
		1092	void
		1093	ev_default_destroy (void)
		1094	{
		1095	#if EV_MULTIPLICITY
		1096	struct ev_loop *loop = ev_default_loop_ptr;
		1097	#endif
		1098
		1099	#ifndef _WIN32
		1100	ev_ref (EV_A); /* child watcher */
		1101	ev_signal_stop (EV_A_ &childev);
		1102	#endif
		1103
		1104	ev_ref (EV_A); /* signal watcher */
		1105	ev_io_stop (EV_A_ &sigev);
		1106
		1107	close (sigpipe [0]); sigpipe [0] = 0;
		1108	close (sigpipe [1]); sigpipe [1] = 0;
		1109
		1110	loop_destroy (EV_A);
		1111	}
		1112
		1113	void
		1114	ev_default_fork (void)
		1115	{
		1116	#if EV_MULTIPLICITY
		1117	struct ev_loop *loop = ev_default_loop_ptr;
		1118	#endif
		1119
		1120	if (backend)
		1121	postfork = 1;
514	}	1122	}
515		1123
516	/*****************************************************************************/	1124	/*****************************************************************************/
517		1125
518	void	1126	int inline_size
519	ev_fork_prepare (void)	1127	any_pending (EV_P)
520	{	1128	{
521	/* nop */	1129	int pri;
522	}
523		1130
524	void	1131	for (pri = NUMPRI; pri--; )
525	ev_fork_parent (void)	1132	if (pendingcnt [pri])
526	{	1133	return 1;
527	/* nop */
528	}
529		1134
530	void	1135	return 0;
531	ev_fork_child (void)
532	{
533	#if EV_USE_EPOLL
534	if (ev_method == EVMETHOD_EPOLL)
535	epoll_postfork_child ();
536	#endif
537
538	ev_io_stop (&sigev);
539	close (sigpipe [0]);
540	close (sigpipe [1]);
541	pipe (sigpipe);
542	siginit ();
543	}	1136	}
544		1137
545	/*****************************************************************************/	1138	void inline_speed
546
547	static void
548	call_pending (void)	1139	call_pending (EV_P)
549	{	1140	{
		1141	int pri;
		1142
		1143	for (pri = NUMPRI; pri--; )
550	while (pendingcnt)	1144	while (pendingcnt [pri])
551	{	1145	{
552	ANPENDING *p = pendings + --pendingcnt;	1146	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
553		1147
554	if (p->w)	1148	if (expect_true (p->w))
555	{	1149	{
		1150	/*assert (("non-pending watcher on pending list", p->w->pending));*/
		1151
556	p->w->pending = 0;	1152	p->w->pending = 0;
557	p->w->cb (p->w, p->events);	1153	EV_CB_INVOKE (p->w, p->events);
558	}	1154	}
559	}	1155	}
560	}	1156	}
561		1157
562	static void	1158	void inline_size
563	timers_reify (void)	1159	timers_reify (EV_P)
564	{	1160	{
565	while (timercnt && timers [0]->at <= now)	1161	while (timercnt && ((WT)timers [0])->at <= mn_now)
566	{	1162	{
567	struct ev_timer *w = timers [0];	1163	ev_timer *w = timers [0];
		1164
		1165	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
568		1166
569	/* first reschedule or stop timer */	1167	/* first reschedule or stop timer */
570	if (w->repeat)	1168	if (w->repeat)
571	{	1169	{
572	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1170	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1171
573	w->at = now + w->repeat;	1172	((WT)w)->at += w->repeat;
		1173	if (((WT)w)->at < mn_now)
		1174	((WT)w)->at = mn_now;
		1175
574	downheap ((WT *)timers, timercnt, 0);	1176	downheap ((WT *)timers, timercnt, 0);
575	}	1177	}
576	else	1178	else
577	ev_timer_stop (w); /* nonrepeating: stop timer */	1179	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
578		1180
579	event ((W)w, EV_TIMEOUT);	1181	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
580	}	1182	}
581	}	1183	}
582		1184
583	static void	1185	#if EV_PERIODIC_ENABLE
		1186	void inline_size
584	periodics_reify (void)	1187	periodics_reify (EV_P)
585	{	1188	{
586	while (periodiccnt && periodics [0]->at <= ev_now)	1189	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
587	{	1190	{
588	struct ev_periodic *w = periodics [0];	1191	ev_periodic *w = periodics [0];
		1192
		1193	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
589		1194
590	/* first reschedule or stop timer */	1195	/* first reschedule or stop timer */
591	if (w->interval)	1196	if (w->reschedule_cb)
592	{	1197	{
		1198	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1199	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1200	downheap ((WT *)periodics, periodiccnt, 0);
		1201	}
		1202	else if (w->interval)
		1203	{
593	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1204	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
594	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	1205	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
595	downheap ((WT *)periodics, periodiccnt, 0);	1206	downheap ((WT *)periodics, periodiccnt, 0);
596	}	1207	}
597	else	1208	else
598	ev_periodic_stop (w); /* nonrepeating: stop timer */	1209	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
599		1210
600	event ((W)w, EV_PERIODIC);	1211	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
601	}	1212	}
602	}	1213	}
603		1214
604	static void	1215	static void noinline
605	periodics_reschedule (ev_tstamp diff)	1216	periodics_reschedule (EV_P)
606	{	1217	{
607	int i;	1218	int i;
608		1219
609	/* adjust periodics after time jump */	1220	/* adjust periodics after time jump */
610	for (i = 0; i < periodiccnt; ++i)	1221	for (i = 0; i < periodiccnt; ++i)
611	{	1222	{
612	struct ev_periodic *w = periodics [i];	1223	ev_periodic *w = periodics [i];
613		1224
		1225	if (w->reschedule_cb)
		1226	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
614	if (w->interval)	1227	else if (w->interval)
615	{
616	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1228	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
617
618	if (fabs (diff) >= 1e-4)
619	{
620	ev_periodic_stop (w);
621	ev_periodic_start (w);
622
623	i = 0; /* restart loop, inefficient, but time jumps should be rare */
624	}
625	}
626	}	1229	}
627	}
628		1230
629	static int	1231	/* now rebuild the heap */
		1232	for (i = periodiccnt >> 1; i--; )
		1233	downheap ((WT *)periodics, periodiccnt, i);
		1234	}
		1235	#endif
		1236
		1237	int inline_size
630	time_update_monotonic (void)	1238	time_update_monotonic (EV_P)
631	{	1239	{
632	now = get_clock ();	1240	mn_now = get_clock ();
633		1241
634	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))	1242	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
635	{	1243	{
636	ev_now = now + diff;	1244	ev_rt_now = rtmn_diff + mn_now;
637	return 0;	1245	return 0;
638	}	1246	}
639	else	1247	else
640	{	1248	{
641	now_floor = now;	1249	now_floor = mn_now;
642	ev_now = ev_time ();	1250	ev_rt_now = ev_time ();
643	return 1;	1251	return 1;
644	}	1252	}
645	}	1253	}
646		1254
647	static void	1255	void inline_size
648	time_update (void)	1256	time_update (EV_P)
649	{	1257	{
650	int i;	1258	int i;
651		1259
652	#if EV_USE_MONOTONIC	1260	#if EV_USE_MONOTONIC
653	if (expect_true (have_monotonic))	1261	if (expect_true (have_monotonic))
654	{	1262	{
655	if (time_update_monotonic ())	1263	if (time_update_monotonic (EV_A))
656	{	1264	{
657	ev_tstamp odiff = diff;	1265	ev_tstamp odiff = rtmn_diff;
658		1266
659	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1267	/* loop a few times, before making important decisions.
		1268	* on the choice of "4": one iteration isn't enough,
		1269	* in case we get preempted during the calls to
		1270	* ev_time and get_clock. a second call is almost guarenteed
		1271	* to succeed in that case, though. and looping a few more times
		1272	* doesn't hurt either as we only do this on time-jumps or
		1273	* in the unlikely event of getting preempted here.
		1274	*/
		1275	for (i = 4; --i; )
660	{	1276	{
661	diff = ev_now - now;	1277	rtmn_diff = ev_rt_now - mn_now;
662		1278
663	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1279	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
664	return; /* all is well */	1280	return; /* all is well */
665		1281
666	ev_now = ev_time ();	1282	ev_rt_now = ev_time ();
667	now = get_clock ();	1283	mn_now = get_clock ();
668	now_floor = now;	1284	now_floor = mn_now;
669	}	1285	}
670		1286
		1287	# if EV_PERIODIC_ENABLE
671	periodics_reschedule (diff - odiff);	1288	periodics_reschedule (EV_A);
		1289	# endif
672	/* no timer adjustment, as the monotonic clock doesn't jump */	1290	/* no timer adjustment, as the monotonic clock doesn't jump */
		1291	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
673	}	1292	}
674	}	1293	}
675	else	1294	else
676	#endif	1295	#endif
677	{	1296	{
678	ev_now = ev_time ();	1297	ev_rt_now = ev_time ();
679		1298
680	if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1299	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
681	{	1300	{
		1301	#if EV_PERIODIC_ENABLE
682	periodics_reschedule (ev_now - now);	1302	periodics_reschedule (EV_A);
		1303	#endif
683		1304
684	/* adjust timers. this is easy, as the offset is the same for all */	1305	/* adjust timers. this is easy, as the offset is the same for all */
685	for (i = 0; i < timercnt; ++i)	1306	for (i = 0; i < timercnt; ++i)
686	timers [i]->at += diff;	1307	((WT)timers [i])->at += ev_rt_now - mn_now;
687	}	1308	}
688		1309
689	now = ev_now;	1310	mn_now = ev_rt_now;
690	}	1311	}
691	}	1312	}
692		1313
693	int ev_loop_done;	1314	void
		1315	ev_ref (EV_P)
		1316	{
		1317	++activecnt;
		1318	}
694		1319
		1320	void
		1321	ev_unref (EV_P)
		1322	{
		1323	--activecnt;
		1324	}
		1325
		1326	static int loop_done;
		1327
		1328	void
695	void ev_loop (int flags)	1329	ev_loop (EV_P_ int flags)
696	{	1330	{
697	double block;
698	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1331	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1332	? EVUNLOOP_ONE
		1333	: EVUNLOOP_CANCEL;
699		1334
700	do	1335	while (activecnt)
701	{	1336	{
		1337	/* we might have forked, so reify kernel state if necessary */
		1338	#if EV_FORK_ENABLE
		1339	if (expect_false (postfork))
		1340	if (forkcnt)
		1341	{
		1342	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1343	call_pending (EV_A);
		1344	}
		1345	#endif
		1346
702	/* queue check watchers (and execute them) */	1347	/* queue check watchers (and execute them) */
703	if (expect_false (preparecnt))	1348	if (expect_false (preparecnt))
704	{	1349	{
705	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1350	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
706	call_pending ();	1351	call_pending (EV_A);
707	}	1352	}
708		1353
		1354	/* we might have forked, so reify kernel state if necessary */
		1355	if (expect_false (postfork))
		1356	loop_fork (EV_A);
		1357
709	/* update fd-related kernel structures */	1358	/* update fd-related kernel structures */
710	fd_reify ();	1359	fd_reify (EV_A);
711		1360
712	/* calculate blocking time */	1361	/* calculate blocking time */
		1362	{
		1363	double block;
713		1364
714	/* we only need this for !monotonic clockor timers, but as we basically	1365	if (flags & EVLOOP_NONBLOCK || idlecnt)
715	always have timers, we just calculate it always */	1366	block = 0.; /* do not block at all */
		1367	else
		1368	{
		1369	/* update time to cancel out callback processing overhead */
716	#if EV_USE_MONOTONIC	1370	#if EV_USE_MONOTONIC
717	if (expect_true (have_monotonic))	1371	if (expect_true (have_monotonic))
718	time_update_monotonic ();	1372	time_update_monotonic (EV_A);
719	else	1373	else
720	#endif	1374	#endif
721	{	1375	{
722	ev_now = ev_time ();	1376	ev_rt_now = ev_time ();
723	now = ev_now;	1377	mn_now = ev_rt_now;
724	}	1378	}
725		1379
726	if (flags & EVLOOP_NONBLOCK || idlecnt)
727	block = 0.;
728	else
729	{
730	block = MAX_BLOCKTIME;	1380	block = MAX_BLOCKTIME;
731		1381
732	if (timercnt)	1382	if (timercnt)
733	{	1383	{
734	ev_tstamp to = timers [0]->at - now + method_fudge;	1384	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
735	if (block > to) block = to;	1385	if (block > to) block = to;
736	}	1386	}
737		1387
		1388	#if EV_PERIODIC_ENABLE
738	if (periodiccnt)	1389	if (periodiccnt)
739	{	1390	{
740	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1391	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
741	if (block > to) block = to;	1392	if (block > to) block = to;
742	}	1393	}
		1394	#endif
743		1395
744	if (block < 0.) block = 0.;	1396	if (expect_false (block < 0.)) block = 0.;
745	}	1397	}
746		1398
747	method_poll (block);	1399	backend_poll (EV_A_ block);
		1400	}
748		1401
749	/* update ev_now, do magic */	1402	/* update ev_rt_now, do magic */
750	time_update ();	1403	time_update (EV_A);
751		1404
752	/* queue pending timers and reschedule them */	1405	/* queue pending timers and reschedule them */
753	timers_reify (); /* relative timers called last */	1406	timers_reify (EV_A); /* relative timers called last */
		1407	#if EV_PERIODIC_ENABLE
754	periodics_reify (); /* absolute timers called first */	1408	periodics_reify (EV_A); /* absolute timers called first */
		1409	#endif
755		1410
756	/* queue idle watchers unless io or timers are pending */	1411	/* queue idle watchers unless other events are pending */
757	if (!pendingcnt)	1412	if (idlecnt && !any_pending (EV_A))
758	queue_events ((W *)idles, idlecnt, EV_IDLE);	1413	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
759		1414
760	/* queue check watchers, to be executed first */	1415	/* queue check watchers, to be executed first */
761	if (checkcnt)	1416	if (expect_false (checkcnt))
762	queue_events ((W *)checks, checkcnt, EV_CHECK);	1417	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
763		1418
764	call_pending ();	1419	call_pending (EV_A);
765	}
766	while (!ev_loop_done);
767		1420
768	if (ev_loop_done != 2)	1421	if (expect_false (loop_done))
		1422	break;
		1423	}
		1424
		1425	if (loop_done == EVUNLOOP_ONE)
		1426	loop_done = EVUNLOOP_CANCEL;
		1427	}
		1428
		1429	void
		1430	ev_unloop (EV_P_ int how)
		1431	{
769	ev_loop_done = 0;	1432	loop_done = how;
770	}	1433	}
771		1434
772	/*****************************************************************************/	1435	/*****************************************************************************/
773		1436
774	static void	1437	void inline_size
775	wlist_add (WL *head, WL elem)	1438	wlist_add (WL *head, WL elem)
776	{	1439	{
777	elem->next = *head;	1440	elem->next = *head;
778	*head = elem;	1441	*head = elem;
779	}	1442	}
780		1443
781	static void	1444	void inline_size
782	wlist_del (WL *head, WL elem)	1445	wlist_del (WL *head, WL elem)
783	{	1446	{
784	while (*head)	1447	while (*head)
785	{	1448	{
786	if (*head == elem)	1449	if (*head == elem)
…		…
791		1454
792	head = &(*head)->next;	1455	head = &(*head)->next;
793	}	1456	}
794	}	1457	}
795		1458
796	static void	1459	void inline_speed
797	ev_clear_pending (W w)	1460	ev_clear_pending (EV_P_ W w)
798	{	1461	{
799	if (w->pending)	1462	if (w->pending)
800	{	1463	{
801	pendings [w->pending - 1].w = 0;	1464	pendings [ABSPRI (w)][w->pending - 1].w = 0;
802	w->pending = 0;	1465	w->pending = 0;
803	}	1466	}
804	}	1467	}
805		1468
806	static void	1469	void inline_speed
807	ev_start (W w, int active)	1470	ev_start (EV_P_ W w, int active)
808	{	1471	{
		1472	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1473	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1474
809	w->active = active;	1475	w->active = active;
		1476	ev_ref (EV_A);
810	}	1477	}
811		1478
812	static void	1479	void inline_size
813	ev_stop (W w)	1480	ev_stop (EV_P_ W w)
814	{	1481	{
		1482	ev_unref (EV_A);
815	w->active = 0;	1483	w->active = 0;
816	}	1484	}
817		1485
818	/*****************************************************************************/	1486	/*****************************************************************************/
819		1487
820	void	1488	void
821	ev_io_start (struct ev_io *w)	1489	ev_io_start (EV_P_ ev_io *w)
822	{	1490	{
823	int fd = w->fd;	1491	int fd = w->fd;
824		1492
825	if (ev_is_active (w))	1493	if (expect_false (ev_is_active (w)))
826	return;	1494	return;
827		1495
828	assert (("ev_io_start called with negative fd", fd >= 0));	1496	assert (("ev_io_start called with negative fd", fd >= 0));
829		1497
830	ev_start ((W)w, 1);	1498	ev_start (EV_A_ (W)w, 1);
831	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1499	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
832	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1500	wlist_add ((WL *)&anfds[fd].head, (WL)w);
833		1501
834	fd_change (fd);	1502	fd_change (EV_A_ fd);
835	}	1503	}
836		1504
837	void	1505	void
838	ev_io_stop (struct ev_io *w)	1506	ev_io_stop (EV_P_ ev_io *w)
839	{	1507	{
840	ev_clear_pending ((W)w);	1508	ev_clear_pending (EV_A_ (W)w);
841	if (!ev_is_active (w))	1509	if (expect_false (!ev_is_active (w)))
842	return;	1510	return;
		1511
		1512	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
843		1513
844	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1514	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
845	ev_stop ((W)w);	1515	ev_stop (EV_A_ (W)w);
846		1516
847	fd_change (w->fd);	1517	fd_change (EV_A_ w->fd);
848	}	1518	}
849		1519
850	void	1520	void
851	ev_timer_start (struct ev_timer *w)	1521	ev_timer_start (EV_P_ ev_timer *w)
852	{	1522	{
853	if (ev_is_active (w))	1523	if (expect_false (ev_is_active (w)))
854	return;	1524	return;
855		1525
856	w->at += now;	1526	((WT)w)->at += mn_now;
857		1527
858	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1528	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
859		1529
860	ev_start ((W)w, ++timercnt);	1530	ev_start (EV_A_ (W)w, ++timercnt);
861	array_needsize (timers, timermax, timercnt, );	1531	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
862	timers [timercnt - 1] = w;	1532	timers [timercnt - 1] = w;
863	upheap ((WT *)timers, timercnt - 1);	1533	upheap ((WT *)timers, timercnt - 1);
864	}
865		1534
		1535	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1536	}
		1537
866	void	1538	void
867	ev_timer_stop (struct ev_timer *w)	1539	ev_timer_stop (EV_P_ ev_timer *w)
868	{	1540	{
869	ev_clear_pending ((W)w);	1541	ev_clear_pending (EV_A_ (W)w);
870	if (!ev_is_active (w))	1542	if (expect_false (!ev_is_active (w)))
871	return;	1543	return;
872		1544
873	if (w->active < timercnt--)	1545	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1546
		1547	{
		1548	int active = ((W)w)->active;
		1549
		1550	if (expect_true (--active < --timercnt))
874	{	1551	{
875	timers [w->active - 1] = timers [timercnt];	1552	timers [active] = timers [timercnt];
876	downheap ((WT *)timers, timercnt, w->active - 1);	1553	adjustheap ((WT *)timers, timercnt, active);
877	}	1554	}
		1555	}
878		1556
879	w->at = w->repeat;	1557	((WT)w)->at -= mn_now;
880		1558
881	ev_stop ((W)w);	1559	ev_stop (EV_A_ (W)w);
882	}	1560	}
883		1561
884	void	1562	void
885	ev_timer_again (struct ev_timer *w)	1563	ev_timer_again (EV_P_ ev_timer *w)
886	{	1564	{
887	if (ev_is_active (w))	1565	if (ev_is_active (w))
888	{	1566	{
889	if (w->repeat)	1567	if (w->repeat)
890	{	1568	{
891	w->at = now + w->repeat;	1569	((WT)w)->at = mn_now + w->repeat;
892	downheap ((WT *)timers, timercnt, w->active - 1);	1570	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
893	}	1571	}
894	else	1572	else
895	ev_timer_stop (w);	1573	ev_timer_stop (EV_A_ w);
896	}	1574	}
897	else if (w->repeat)	1575	else if (w->repeat)
		1576	{
		1577	w->at = w->repeat;
898	ev_timer_start (w);	1578	ev_timer_start (EV_A_ w);
		1579	}
899	}	1580	}
900		1581
		1582	#if EV_PERIODIC_ENABLE
901	void	1583	void
902	ev_periodic_start (struct ev_periodic *w)	1584	ev_periodic_start (EV_P_ ev_periodic *w)
903	{	1585	{
904	if (ev_is_active (w))	1586	if (expect_false (ev_is_active (w)))
905	return;	1587	return;
906		1588
		1589	if (w->reschedule_cb)
		1590	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1591	else if (w->interval)
		1592	{
907	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1593	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
908
909	/* this formula differs from the one in periodic_reify because we do not always round up */	1594	/* this formula differs from the one in periodic_reify because we do not always round up */
910	if (w->interval)
911	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1595	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1596	}
912		1597
913	ev_start ((W)w, ++periodiccnt);	1598	ev_start (EV_A_ (W)w, ++periodiccnt);
914	array_needsize (periodics, periodicmax, periodiccnt, );	1599	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
915	periodics [periodiccnt - 1] = w;	1600	periodics [periodiccnt - 1] = w;
916	upheap ((WT *)periodics, periodiccnt - 1);	1601	upheap ((WT *)periodics, periodiccnt - 1);
917	}
918		1602
		1603	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1604	}
		1605
919	void	1606	void
920	ev_periodic_stop (struct ev_periodic *w)	1607	ev_periodic_stop (EV_P_ ev_periodic *w)
921	{	1608	{
922	ev_clear_pending ((W)w);	1609	ev_clear_pending (EV_A_ (W)w);
923	if (!ev_is_active (w))	1610	if (expect_false (!ev_is_active (w)))
924	return;	1611	return;
925		1612
926	if (w->active < periodiccnt--)	1613	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1614
		1615	{
		1616	int active = ((W)w)->active;
		1617
		1618	if (expect_true (--active < --periodiccnt))
927	{	1619	{
928	periodics [w->active - 1] = periodics [periodiccnt];	1620	periodics [active] = periodics [periodiccnt];
929	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1621	adjustheap ((WT *)periodics, periodiccnt, active);
930	}	1622	}
		1623	}
931		1624
932	ev_stop ((W)w);	1625	ev_stop (EV_A_ (W)w);
933	}	1626	}
934		1627
935	void	1628	void
		1629	ev_periodic_again (EV_P_ ev_periodic *w)
		1630	{
		1631	/* TODO: use adjustheap and recalculation */
		1632	ev_periodic_stop (EV_A_ w);
		1633	ev_periodic_start (EV_A_ w);
		1634	}
		1635	#endif
		1636
		1637	#ifndef SA_RESTART
		1638	# define SA_RESTART 0
		1639	#endif
		1640
		1641	void
936	ev_signal_start (struct ev_signal *w)	1642	ev_signal_start (EV_P_ ev_signal *w)
937	{	1643	{
		1644	#if EV_MULTIPLICITY
		1645	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1646	#endif
938	if (ev_is_active (w))	1647	if (expect_false (ev_is_active (w)))
939	return;	1648	return;
940		1649
941	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1650	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
942		1651
943	ev_start ((W)w, 1);	1652	ev_start (EV_A_ (W)w, 1);
944	array_needsize (signals, signalmax, w->signum, signals_init);	1653	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
945	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1654	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
946		1655
947	if (!w->next)	1656	if (!((WL)w)->next)
948	{	1657	{
		1658	#if _WIN32
		1659	signal (w->signum, sighandler);
		1660	#else
949	struct sigaction sa;	1661	struct sigaction sa;
950	sa.sa_handler = sighandler;	1662	sa.sa_handler = sighandler;
951	sigfillset (&sa.sa_mask);	1663	sigfillset (&sa.sa_mask);
952	sa.sa_flags = 0;	1664	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
953	sigaction (w->signum, &sa, 0);	1665	sigaction (w->signum, &sa, 0);
		1666	#endif
954	}	1667	}
955	}	1668	}
956		1669
957	void	1670	void
958	ev_signal_stop (struct ev_signal *w)	1671	ev_signal_stop (EV_P_ ev_signal *w)
959	{	1672	{
960	ev_clear_pending ((W)w);	1673	ev_clear_pending (EV_A_ (W)w);
961	if (!ev_is_active (w))	1674	if (expect_false (!ev_is_active (w)))
962	return;	1675	return;
963		1676
964	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1677	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
965	ev_stop ((W)w);	1678	ev_stop (EV_A_ (W)w);
966		1679
967	if (!signals [w->signum - 1].head)	1680	if (!signals [w->signum - 1].head)
968	signal (w->signum, SIG_DFL);	1681	signal (w->signum, SIG_DFL);
969	}	1682	}
970		1683
971	void	1684	void
		1685	ev_child_start (EV_P_ ev_child *w)
		1686	{
		1687	#if EV_MULTIPLICITY
		1688	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1689	#endif
		1690	if (expect_false (ev_is_active (w)))
		1691	return;
		1692
		1693	ev_start (EV_A_ (W)w, 1);
		1694	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1695	}
		1696
		1697	void
		1698	ev_child_stop (EV_P_ ev_child *w)
		1699	{
		1700	ev_clear_pending (EV_A_ (W)w);
		1701	if (expect_false (!ev_is_active (w)))
		1702	return;
		1703
		1704	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1705	ev_stop (EV_A_ (W)w);
		1706	}
		1707
		1708	#if EV_STAT_ENABLE
		1709
		1710	# ifdef _WIN32
		1711	# undef lstat
		1712	# define lstat(a,b) _stati64 (a,b)
		1713	# endif
		1714
		1715	#define DEF_STAT_INTERVAL 5.0074891
		1716	#define MIN_STAT_INTERVAL 0.1074891
		1717
		1718	void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1719
		1720	#if EV_USE_INOTIFY
		1721	# define EV_INOTIFY_BUFSIZE ((PATH_MAX + sizeof (struct inotify_event)) + 2048)
		1722
		1723	static void noinline
		1724	infy_add (EV_P_ ev_stat *w)
		1725	{
		1726	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);
		1727
		1728	if (w->wd < 0)
		1729	{
		1730	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1731
		1732	/* monitor some parent directory for speedup hints */
		1733	if (errno == ENOENT || errno == EACCES)
		1734	{
		1735	char path [PATH_MAX];
		1736	strcpy (path, w->path);
		1737
		1738	do
		1739	{
		1740	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1741	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1742
		1743	char *pend = strrchr (path, '/');
		1744
		1745	if (!pend)
		1746	break; /* whoops, no '/', complain to your admin */
		1747
		1748	*pend = 0;
		1749	w->wd = inotify_add_watch (fs_fd, path, IN_DELETE_SELF | IN_CREATE | IN_MOVED_TO | IN_MASK_ADD);
		1750	}
		1751	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1752	}
		1753	}
		1754	else
		1755	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1756
		1757	if (w->wd >= 0)
		1758	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1759	}
		1760
		1761	static void noinline
		1762	infy_del (EV_P_ ev_stat *w)
		1763	{
		1764	WL w_;
		1765	int slot;
		1766	int wd = w->wd;
		1767
		1768	if (wd < 0)
		1769	return;
		1770
		1771	w->wd = -2;
		1772	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1773	wlist_del (&fs_hash [slot].head, (WL)w);
		1774
		1775	/* remove this watcher, if others are watching it, they will rearm */
		1776	inotify_rm_watch (fs_fd, wd);
		1777	}
		1778
		1779	static void noinline
		1780	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1781	{
		1782	if (slot < 0)
		1783	/* overflow, need to check for all hahs slots */
		1784	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1785	infy_wd (EV_A_ slot, wd, ev);
		1786	else
		1787	{
		1788	WL w_;
		1789
		1790	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1791	{
		1792	ev_stat *w = (ev_stat *)w_;
		1793	w_ = w_->next; /* lets us remove this watcher and all before it */
		1794
		1795	if (w->wd == wd || wd == -1)
		1796	{
		1797	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		1798	{
		1799	w->wd = -1;
		1800	infy_add (EV_A_ w); /* re-add, no matter what */
		1801	}
		1802
		1803	stat_timer_cb (EV_P_ &w->timer, 0);
		1804	}
		1805	}
		1806	}
		1807	}
		1808
		1809	static void
		1810	infy_cb (EV_P_ ev_io *w, int revents)
		1811	{
		1812	char buf [EV_INOTIFY_BUFSIZE];
		1813	struct inotify_event *ev = (struct inotify_event *)buf;
		1814	int ofs;
		1815	int len = read (fs_fd, buf, sizeof (buf));
		1816
		1817	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1818	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1819	}
		1820
		1821	void inline_size
		1822	infy_init (EV_P)
		1823	{
		1824	if (fs_fd != -2)
		1825	return;
		1826
		1827	fs_fd = inotify_init ();
		1828
		1829	if (fs_fd >= 0)
		1830	{
		1831	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1832	ev_set_priority (&fs_w, EV_MAXPRI);
		1833	ev_io_start (EV_A_ &fs_w);
		1834	}
		1835	}
		1836
		1837	#endif
		1838
		1839	void
		1840	ev_stat_stat (EV_P_ ev_stat *w)
		1841	{
		1842	if (lstat (w->path, &w->attr) < 0)
		1843	w->attr.st_nlink = 0;
		1844	else if (!w->attr.st_nlink)
		1845	w->attr.st_nlink = 1;
		1846	}
		1847
		1848	void noinline
		1849	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1850	{
		1851	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		1852
		1853	/* we copy this here each the time so that */
		1854	/* prev has the old value when the callback gets invoked */
		1855	w->prev = w->attr;
		1856	ev_stat_stat (EV_A_ w);
		1857
		1858	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
		1859	{
		1860	#if EV_USE_INOTIFY
		1861	infy_del (EV_A_ w);
		1862	infy_add (EV_A_ w);
		1863	ev_stat_stat (EV_A_ w); /* avoid race... */
		1864	#endif
		1865
		1866	ev_feed_event (EV_A_ w, EV_STAT);
		1867	}
		1868	}
		1869
		1870	void
		1871	ev_stat_start (EV_P_ ev_stat *w)
		1872	{
		1873	if (expect_false (ev_is_active (w)))
		1874	return;
		1875
		1876	/* since we use memcmp, we need to clear any padding data etc. */
		1877	memset (&w->prev, 0, sizeof (ev_statdata));
		1878	memset (&w->attr, 0, sizeof (ev_statdata));
		1879
		1880	ev_stat_stat (EV_A_ w);
		1881
		1882	if (w->interval < MIN_STAT_INTERVAL)
		1883	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		1884
		1885	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		1886	ev_set_priority (&w->timer, ev_priority (w));
		1887
		1888	#if EV_USE_INOTIFY
		1889	infy_init (EV_A);
		1890
		1891	if (fs_fd >= 0)
		1892	infy_add (EV_A_ w);
		1893	else
		1894	#endif
		1895	ev_timer_start (EV_A_ &w->timer);
		1896
		1897	ev_start (EV_A_ (W)w, 1);
		1898	}
		1899
		1900	void
		1901	ev_stat_stop (EV_P_ ev_stat *w)
		1902	{
		1903	ev_clear_pending (EV_A_ (W)w);
		1904	if (expect_false (!ev_is_active (w)))
		1905	return;
		1906
		1907	#if EV_USE_INOTIFY
		1908	infy_del (EV_A_ w);
		1909	#endif
		1910	ev_timer_stop (EV_A_ &w->timer);
		1911
		1912	ev_stop (EV_A_ (W)w);
		1913	}
		1914	#endif
		1915
		1916	void
972	ev_idle_start (struct ev_idle *w)	1917	ev_idle_start (EV_P_ ev_idle *w)
973	{	1918	{
974	if (ev_is_active (w))	1919	if (expect_false (ev_is_active (w)))
975	return;	1920	return;
976		1921
977	ev_start ((W)w, ++idlecnt);	1922	ev_start (EV_A_ (W)w, ++idlecnt);
978	array_needsize (idles, idlemax, idlecnt, );	1923	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
979	idles [idlecnt - 1] = w;	1924	idles [idlecnt - 1] = w;
980	}	1925	}
981		1926
982	void	1927	void
983	ev_idle_stop (struct ev_idle *w)	1928	ev_idle_stop (EV_P_ ev_idle *w)
984	{	1929	{
985	ev_clear_pending ((W)w);	1930	ev_clear_pending (EV_A_ (W)w);
986	if (ev_is_active (w))	1931	if (expect_false (!ev_is_active (w)))
987	return;	1932	return;
988		1933
		1934	{
		1935	int active = ((W)w)->active;
989	idles [w->active - 1] = idles [--idlecnt];	1936	idles [active - 1] = idles [--idlecnt];
		1937	((W)idles [active - 1])->active = active;
		1938	}
		1939
990	ev_stop ((W)w);	1940	ev_stop (EV_A_ (W)w);
991	}	1941	}
992		1942
993	void	1943	void
994	ev_prepare_start (struct ev_prepare *w)	1944	ev_prepare_start (EV_P_ ev_prepare *w)
995	{	1945	{
996	if (ev_is_active (w))	1946	if (expect_false (ev_is_active (w)))
997	return;	1947	return;
998		1948
999	ev_start ((W)w, ++preparecnt);	1949	ev_start (EV_A_ (W)w, ++preparecnt);
1000	array_needsize (prepares, preparemax, preparecnt, );	1950	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1001	prepares [preparecnt - 1] = w;	1951	prepares [preparecnt - 1] = w;
1002	}	1952	}
1003		1953
1004	void	1954	void
1005	ev_prepare_stop (struct ev_prepare *w)	1955	ev_prepare_stop (EV_P_ ev_prepare *w)
1006	{	1956	{
1007	ev_clear_pending ((W)w);	1957	ev_clear_pending (EV_A_ (W)w);
1008	if (ev_is_active (w))	1958	if (expect_false (!ev_is_active (w)))
1009	return;	1959	return;
1010		1960
		1961	{
		1962	int active = ((W)w)->active;
1011	prepares [w->active - 1] = prepares [--preparecnt];	1963	prepares [active - 1] = prepares [--preparecnt];
		1964	((W)prepares [active - 1])->active = active;
		1965	}
		1966
1012	ev_stop ((W)w);	1967	ev_stop (EV_A_ (W)w);
1013	}	1968	}
1014		1969
1015	void	1970	void
1016	ev_check_start (struct ev_check *w)	1971	ev_check_start (EV_P_ ev_check *w)
1017	{	1972	{
1018	if (ev_is_active (w))	1973	if (expect_false (ev_is_active (w)))
1019	return;	1974	return;
1020		1975
1021	ev_start ((W)w, ++checkcnt);	1976	ev_start (EV_A_ (W)w, ++checkcnt);
1022	array_needsize (checks, checkmax, checkcnt, );	1977	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1023	checks [checkcnt - 1] = w;	1978	checks [checkcnt - 1] = w;
1024	}	1979	}
1025		1980
1026	void	1981	void
1027	ev_check_stop (struct ev_check *w)	1982	ev_check_stop (EV_P_ ev_check *w)
1028	{	1983	{
1029	ev_clear_pending ((W)w);	1984	ev_clear_pending (EV_A_ (W)w);
1030	if (ev_is_active (w))	1985	if (expect_false (!ev_is_active (w)))
1031	return;	1986	return;
1032		1987
		1988	{
		1989	int active = ((W)w)->active;
1033	checks [w->active - 1] = checks [--checkcnt];	1990	checks [active - 1] = checks [--checkcnt];
		1991	((W)checks [active - 1])->active = active;
		1992	}
		1993
1034	ev_stop ((W)w);	1994	ev_stop (EV_A_ (W)w);
1035	}	1995	}
1036		1996
1037	void	1997	#if EV_EMBED_ENABLE
1038	ev_child_start (struct ev_child *w)	1998	void noinline
		1999	ev_embed_sweep (EV_P_ ev_embed *w)
1039	{	2000	{
		2001	ev_loop (w->loop, EVLOOP_NONBLOCK);
		2002	}
		2003
		2004	static void
		2005	embed_cb (EV_P_ ev_io *io, int revents)
		2006	{
		2007	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		2008
1040	if (ev_is_active (w))	2009	if (ev_cb (w))
1041	return;	2010	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		2011	else
		2012	ev_embed_sweep (loop, w);
		2013	}
1042		2014
		2015	void
		2016	ev_embed_start (EV_P_ ev_embed *w)
		2017	{
		2018	if (expect_false (ev_is_active (w)))
		2019	return;
		2020
		2021	{
		2022	struct ev_loop *loop = w->loop;
		2023	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		2024	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		2025	}
		2026
		2027	ev_set_priority (&w->io, ev_priority (w));
		2028	ev_io_start (EV_A_ &w->io);
		2029
1043	ev_start ((W)w, 1);	2030	ev_start (EV_A_ (W)w, 1);
1044	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1045	}	2031	}
1046		2032
1047	void	2033	void
1048	ev_child_stop (struct ev_child *w)	2034	ev_embed_stop (EV_P_ ev_embed *w)
1049	{	2035	{
1050	ev_clear_pending ((W)w);	2036	ev_clear_pending (EV_A_ (W)w);
1051	if (ev_is_active (w))	2037	if (expect_false (!ev_is_active (w)))
1052	return;	2038	return;
1053		2039
1054	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	2040	ev_io_stop (EV_A_ &w->io);
		2041
1055	ev_stop ((W)w);	2042	ev_stop (EV_A_ (W)w);
1056	}	2043	}
		2044	#endif
		2045
		2046	#if EV_FORK_ENABLE
		2047	void
		2048	ev_fork_start (EV_P_ ev_fork *w)
		2049	{
		2050	if (expect_false (ev_is_active (w)))
		2051	return;
		2052
		2053	ev_start (EV_A_ (W)w, ++forkcnt);
		2054	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2055	forks [forkcnt - 1] = w;
		2056	}
		2057
		2058	void
		2059	ev_fork_stop (EV_P_ ev_fork *w)
		2060	{
		2061	ev_clear_pending (EV_A_ (W)w);
		2062	if (expect_false (!ev_is_active (w)))
		2063	return;
		2064
		2065	{
		2066	int active = ((W)w)->active;
		2067	forks [active - 1] = forks [--forkcnt];
		2068	((W)forks [active - 1])->active = active;
		2069	}
		2070
		2071	ev_stop (EV_A_ (W)w);
		2072	}
		2073	#endif
1057		2074
1058	/*****************************************************************************/	2075	/*****************************************************************************/
1059		2076
1060	struct ev_once	2077	struct ev_once
1061	{	2078	{
1062	struct ev_io io;	2079	ev_io io;
1063	struct ev_timer to;	2080	ev_timer to;
1064	void (*cb)(int revents, void *arg);	2081	void (*cb)(int revents, void *arg);
1065	void *arg;	2082	void *arg;
1066	};	2083	};
1067		2084
1068	static void	2085	static void
1069	once_cb (struct ev_once *once, int revents)	2086	once_cb (EV_P_ struct ev_once *once, int revents)
1070	{	2087	{
1071	void (*cb)(int revents, void *arg) = once->cb;	2088	void (*cb)(int revents, void *arg) = once->cb;
1072	void *arg = once->arg;	2089	void *arg = once->arg;
1073		2090
1074	ev_io_stop (&once->io);	2091	ev_io_stop (EV_A_ &once->io);
1075	ev_timer_stop (&once->to);	2092	ev_timer_stop (EV_A_ &once->to);
1076	free (once);	2093	ev_free (once);
1077		2094
1078	cb (revents, arg);	2095	cb (revents, arg);
1079	}	2096	}
1080		2097
1081	static void	2098	static void
1082	once_cb_io (struct ev_io *w, int revents)	2099	once_cb_io (EV_P_ ev_io *w, int revents)
1083	{	2100	{
1084	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	2101	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1085	}	2102	}
1086		2103
1087	static void	2104	static void
1088	once_cb_to (struct ev_timer *w, int revents)	2105	once_cb_to (EV_P_ ev_timer *w, int revents)
1089	{	2106	{
1090	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	2107	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1091	}	2108	}
1092		2109
1093	void	2110	void
1094	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	2111	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1095	{	2112	{
1096	struct ev_once *once = malloc (sizeof (struct ev_once));	2113	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1097		2114
1098	if (!once)	2115	if (expect_false (!once))
		2116	{
1099	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	2117	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1100	else	2118	return;
1101	{	2119	}
		2120
1102	once->cb = cb;	2121	once->cb = cb;
1103	once->arg = arg;	2122	once->arg = arg;
1104		2123
1105	ev_watcher_init (&once->io, once_cb_io);	2124	ev_init (&once->io, once_cb_io);
1106	if (fd >= 0)	2125	if (fd >= 0)
1107	{	2126	{
1108	ev_io_set (&once->io, fd, events);	2127	ev_io_set (&once->io, fd, events);
1109	ev_io_start (&once->io);	2128	ev_io_start (EV_A_ &once->io);
1110	}	2129	}
1111		2130
1112	ev_watcher_init (&once->to, once_cb_to);	2131	ev_init (&once->to, once_cb_to);
1113	if (timeout >= 0.)	2132	if (timeout >= 0.)
1114	{	2133	{
1115	ev_timer_set (&once->to, timeout, 0.);	2134	ev_timer_set (&once->to, timeout, 0.);
1116	ev_timer_start (&once->to);	2135	ev_timer_start (EV_A_ &once->to);
1117	}
1118	}
1119	}
1120
1121	/*****************************************************************************/
1122
1123	#if 0
1124
1125	struct ev_io wio;
1126
1127	static void
1128	sin_cb (struct ev_io *w, int revents)
1129	{
1130	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1131	}
1132
1133	static void
1134	ocb (struct ev_timer *w, int revents)
1135	{
1136	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1137	ev_timer_stop (w);
1138	ev_timer_start (w);
1139	}
1140
1141	static void
1142	scb (struct ev_signal *w, int revents)
1143	{
1144	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1145	ev_io_stop (&wio);
1146	ev_io_start (&wio);
1147	}
1148
1149	static void
1150	gcb (struct ev_signal *w, int revents)
1151	{
1152	fprintf (stderr, "generic %x\n", revents);
1153
1154	}
1155
1156	int main (void)
1157	{
1158	ev_init (0);
1159
1160	ev_io_init (&wio, sin_cb, 0, EV_READ);
1161	ev_io_start (&wio);
1162
1163	struct ev_timer t[10000];
1164
1165	#if 0
1166	int i;
1167	for (i = 0; i < 10000; ++i)
1168	{	2136	}
1169	struct ev_timer *w = t + i;
1170	ev_watcher_init (w, ocb, i);
1171	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1172	ev_timer_start (w);
1173	if (drand48 () < 0.5)
1174	ev_timer_stop (w);
1175	}
1176	#endif
1177
1178	struct ev_timer t1;
1179	ev_timer_init (&t1, ocb, 5, 10);
1180	ev_timer_start (&t1);
1181
1182	struct ev_signal sig;
1183	ev_signal_init (&sig, scb, SIGQUIT);
1184	ev_signal_start (&sig);
1185
1186	struct ev_check cw;
1187	ev_check_init (&cw, gcb);
1188	ev_check_start (&cw);
1189
1190	struct ev_idle iw;
1191	ev_idle_init (&iw, gcb);
1192	ev_idle_start (&iw);
1193
1194	ev_loop (0);
1195
1196	return 0;
1197	}	2137	}
1198		2138
		2139	#ifdef __cplusplus
		2140	}
1199	#endif	2141	#endif
1200		2142
1201
1202
1203

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