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

Comparing libev/ev.c (file contents):
Revision 1.149 by root, Tue Nov 27 19:23:31 2007 UTC vs.
Revision 1.178 by root, Tue Dec 11 18:36:11 2007 UTC

…		…
94	# else	94	# else
95	# define EV_USE_PORT 0	95	# define EV_USE_PORT 0
96	# endif	96	# endif
97	# endif	97	# endif
98		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
99	#endif	107	#endif
100		108
101	#include <math.h>	109	#include <math.h>
102	#include <stdlib.h>	110	#include <stdlib.h>
103	#include <fcntl.h>	111	#include <fcntl.h>
…		…
109	#include <errno.h>	117	#include <errno.h>
110	#include <sys/types.h>	118	#include <sys/types.h>
111	#include <time.h>	119	#include <time.h>
112		120
113	#include <signal.h>	121	#include <signal.h>
		122
		123	#ifdef EV_H
		124	# include EV_H
		125	#else
		126	# include "ev.h"
		127	#endif
114		128
115	#ifndef _WIN32	129	#ifndef _WIN32
116	# include <sys/time.h>	130	# include <sys/time.h>
117	# include <sys/wait.h>	131	# include <sys/wait.h>
118	# include <unistd.h>	132	# include <unistd.h>
…		…
156		170
157	#ifndef EV_USE_PORT	171	#ifndef EV_USE_PORT
158	# define EV_USE_PORT 0	172	# define EV_USE_PORT 0
159	#endif	173	#endif
160		174
		175	#ifndef EV_USE_INOTIFY
		176	# define EV_USE_INOTIFY 0
		177	#endif
		178
161	#ifndef EV_PID_HASHSIZE	179	#ifndef EV_PID_HASHSIZE
162	# if EV_MINIMAL	180	# if EV_MINIMAL
163	# define EV_PID_HASHSIZE 1	181	# define EV_PID_HASHSIZE 1
164	# else	182	# else
165	# define EV_PID_HASHSIZE 16	183	# define EV_PID_HASHSIZE 16
166	# endif	184	# endif
167	#endif	185	#endif
168		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
		193	#endif
		194
169	/**/	195	/**/
170		196
171	#ifndef CLOCK_MONOTONIC	197	#ifndef CLOCK_MONOTONIC
172	# undef EV_USE_MONOTONIC	198	# undef EV_USE_MONOTONIC
173	# define EV_USE_MONOTONIC 0	199	# define EV_USE_MONOTONIC 0
…		…
180		206
181	#if EV_SELECT_IS_WINSOCKET	207	#if EV_SELECT_IS_WINSOCKET
182	# include <winsock.h>	208	# include <winsock.h>
183	#endif	209	#endif
184		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
185	/**/	219	/**/
		220
		221	/*
		222	* This is used to avoid floating point rounding problems.
		223	* It is added to ev_rt_now when scheduling periodics
		224	* to ensure progress, time-wise, even when rounding
		225	* errors are against us.
		226	* This value is good at least till the year 4000.
		227	* Better solutions welcome.
		228	*/
		229	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
186		230
187	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	231	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
188	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	232	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
189	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds */	233	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds, TODO */
190
191	#ifdef EV_H
192	# include EV_H
193	#else
194	# include "ev.h"
195	#endif
196		234
197	#if __GNUC__ >= 3	235	#if __GNUC__ >= 3
198	# define expect(expr,value) __builtin_expect ((expr),(value))	236	# define expect(expr,value) __builtin_expect ((expr),(value))
199	# define inline_size static inline /* inline for codesize */
200	# if EV_MINIMAL
201	# define noinline __attribute__ ((noinline))	237	# define noinline __attribute__ ((noinline))
202	# define inline_speed static noinline
203	# else
204	# define noinline
205	# define inline_speed static inline
206	# endif
207	#else	238	#else
208	# define expect(expr,value) (expr)	239	# define expect(expr,value) (expr)
209	# define inline_speed static
210	# define inline_size static
211	# define noinline	240	# define noinline
		241	# if __STDC_VERSION__ < 199901L
		242	# define inline
		243	# endif
212	#endif	244	#endif
213		245
214	#define expect_false(expr) expect ((expr) != 0, 0)	246	#define expect_false(expr) expect ((expr) != 0, 0)
215	#define expect_true(expr) expect ((expr) != 0, 1)	247	#define expect_true(expr) expect ((expr) != 0, 1)
		248	#define inline_size static inline
		249
		250	#if EV_MINIMAL
		251	# define inline_speed static noinline
		252	#else
		253	# define inline_speed static inline
		254	#endif
216		255
217	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	256	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
218	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	257	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
219		258
220	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */	259	#define EMPTY /* required for microsofts broken pseudo-c compiler */
221	#define EMPTY2(a,b) /* used to suppress some warnings */	260	#define EMPTY2(a,b) /* used to suppress some warnings */
222		261
223	typedef ev_watcher *W;	262	typedef ev_watcher *W;
224	typedef ev_watcher_list *WL;	263	typedef ev_watcher_list *WL;
225	typedef ev_watcher_time *WT;	264	typedef ev_watcher_time *WT;
…		…
261	ev_set_allocator (void (cb)(void *ptr, long size))	300	ev_set_allocator (void (cb)(void *ptr, long size))
262	{	301	{
263	alloc = cb;	302	alloc = cb;
264	}	303	}
265		304
266	static void *	305	inline_speed void *
267	ev_realloc (void *ptr, long size)	306	ev_realloc (void *ptr, long size)
268	{	307	{
269	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	308	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
270		309
271	if (!ptr && size)	310	if (!ptr && size)
…		…
295	typedef struct	334	typedef struct
296	{	335	{
297	W w;	336	W w;
298	int events;	337	int events;
299	} ANPENDING;	338	} ANPENDING;
		339
		340	#if EV_USE_INOTIFY
		341	typedef struct
		342	{
		343	WL head;
		344	} ANFS;
		345	#endif
300		346
301	#if EV_MULTIPLICITY	347	#if EV_MULTIPLICITY
302		348
303	struct ev_loop	349	struct ev_loop
304	{	350	{
…		…
361	{	407	{
362	return ev_rt_now;	408	return ev_rt_now;
363	}	409	}
364	#endif	410	#endif
365		411
366	#define array_roundsize(type,n) (((n) \| 4) & ~3)	412	int inline_size
		413	array_nextsize (int elem, int cur, int cnt)
		414	{
		415	int ncur = cur + 1;
		416
		417	do
		418	ncur <<= 1;
		419	while (cnt > ncur);
		420
		421	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		422	if (elem * ncur > 4096)
		423	{
		424	ncur *= elem;
		425	ncur = (ncur + elem + 4095 + sizeof (void ) 4) & ~4095;
		426	ncur = ncur - sizeof (void ) 4;
		427	ncur /= elem;
		428	}
		429
		430	return ncur;
		431	}
		432
		433	static noinline void *
		434	array_realloc (int elem, void base, int cur, int cnt)
		435	{
		436	cur = array_nextsize (elem, cur, cnt);
		437	return ev_realloc (base, elem * *cur);
		438	}
367		439
368	#define array_needsize(type,base,cur,cnt,init) \	440	#define array_needsize(type,base,cur,cnt,init) \
369	if (expect_false ((cnt) > cur)) \	441	if (expect_false ((cnt) > (cur))) \
370	{ \	442	{ \
371	int newcnt = cur; \	443	int ocur_ = (cur); \
372	do \	444	(base) = (type *)array_realloc \
373	{ \	445	(sizeof (type), (base), &(cur), (cnt)); \
374	newcnt = array_roundsize (type, newcnt << 1); \	446	init ((base) + (ocur_), (cur) - ocur_); \
375	} \
376	while ((cnt) > newcnt); \
377	\
378	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
379	init (base + cur, newcnt - cur); \
380	cur = newcnt; \
381	}	447	}
382		448
		449	#if 0
383	#define array_slim(type,stem) \	450	#define array_slim(type,stem) \
384	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \	451	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
385	{ \	452	{ \
386	stem ## max = array_roundsize (stem ## cnt >> 1); \	453	stem ## max = array_roundsize (stem ## cnt >> 1); \
387	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\	454	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
388	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\	455	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
389	}	456	}
		457	#endif
390		458
391	#define array_free(stem, idx) \	459	#define array_free(stem, idx) \
392	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	460	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
393		461
394	/*****************************************************************************/	462	/*****************************************************************************/
395		463
396	void noinline	464	void noinline
397	ev_feed_event (EV_P_ void *w, int revents)	465	ev_feed_event (EV_P_ void *w, int revents)
398	{	466	{
399	W w_ = (W)w;	467	W w_ = (W)w;
		468	int pri = ABSPRI (w_);
400		469
401	if (expect_false (w_->pending))	470	if (expect_false (w_->pending))
		471	pendings [pri][w_->pending - 1].events \|= revents;
		472	else
402	{	473	{
		474	w_->pending = ++pendingcnt [pri];
		475	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		476	pendings [pri][w_->pending - 1].w = w_;
403	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;	477	pendings [pri][w_->pending - 1].events = revents;
404	return;
405	}	478	}
406
407	w_->pending = ++pendingcnt [ABSPRI (w_)];
408	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
409	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
410	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
411	}	479	}
412		480
413	void inline_size	481	void inline_size
414	queue_events (EV_P_ W *events, int eventcnt, int type)	482	queue_events (EV_P_ W *events, int eventcnt, int type)
415	{	483	{
…		…
450	}	518	}
451		519
452	void	520	void
453	ev_feed_fd_event (EV_P_ int fd, int revents)	521	ev_feed_fd_event (EV_P_ int fd, int revents)
454	{	522	{
		523	if (fd >= 0 && fd < anfdmax)
455	fd_event (EV_A_ fd, revents);	524	fd_event (EV_A_ fd, revents);
456	}	525	}
457		526
458	void inline_size	527	void inline_size
459	fd_reify (EV_P)	528	fd_reify (EV_P)
460	{	529	{
…		…
554	static void noinline	623	static void noinline
555	fd_rearm_all (EV_P)	624	fd_rearm_all (EV_P)
556	{	625	{
557	int fd;	626	int fd;
558		627
559	/* this should be highly optimised to not do anything but set a flag */
560	for (fd = 0; fd < anfdmax; ++fd)	628	for (fd = 0; fd < anfdmax; ++fd)
561	if (anfds [fd].events)	629	if (anfds [fd].events)
562	{	630	{
563	anfds [fd].events = 0;	631	anfds [fd].events = 0;
564	fd_change (EV_A_ fd);	632	fd_change (EV_A_ fd);
…		…
691	for (signum = signalmax; signum--; )	759	for (signum = signalmax; signum--; )
692	if (signals [signum].gotsig)	760	if (signals [signum].gotsig)
693	ev_feed_signal_event (EV_A_ signum + 1);	761	ev_feed_signal_event (EV_A_ signum + 1);
694	}	762	}
695		763
696	void inline_size	764	void inline_speed
697	fd_intern (int fd)	765	fd_intern (int fd)
698	{	766	{
699	#ifdef _WIN32	767	#ifdef _WIN32
700	int arg = 1;	768	int arg = 1;
701	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	769	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
730	ev_child *w;	798	ev_child *w;
731		799
732	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)	800	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)
733	if (w->pid == pid \|\| !w->pid)	801	if (w->pid == pid \|\| !w->pid)
734	{	802	{
735	ev_priority (w) = ev_priority (sw); /* need to do it now */	803	ev_set_priority (w, ev_priority (sw)); /* need to do it now */
736	w->rpid = pid;	804	w->rpid = pid;
737	w->rstatus = status;	805	w->rstatus = status;
738	ev_feed_event (EV_A_ (W)w, EV_CHILD);	806	ev_feed_event (EV_A_ (W)w, EV_CHILD);
739	}	807	}
740	}	808	}
741		809
742	#ifndef WCONTINUED	810	#ifndef WCONTINUED
…		…
852	ev_backend (EV_P)	920	ev_backend (EV_P)
853	{	921	{
854	return backend;	922	return backend;
855	}	923	}
856		924
857	static void	925	unsigned int
		926	ev_loop_count (EV_P)
		927	{
		928	return loop_count;
		929	}
		930
		931	static void noinline
858	loop_init (EV_P_ unsigned int flags)	932	loop_init (EV_P_ unsigned int flags)
859	{	933	{
860	if (!backend)	934	if (!backend)
861	{	935	{
862	#if EV_USE_MONOTONIC	936	#if EV_USE_MONOTONIC
…		…
870	ev_rt_now = ev_time ();	944	ev_rt_now = ev_time ();
871	mn_now = get_clock ();	945	mn_now = get_clock ();
872	now_floor = mn_now;	946	now_floor = mn_now;
873	rtmn_diff = ev_rt_now - mn_now;	947	rtmn_diff = ev_rt_now - mn_now;
874		948
		949	/* pid check not overridable via env */
		950	#ifndef _WIN32
		951	if (flags & EVFLAG_FORKCHECK)
		952	curpid = getpid ();
		953	#endif
		954
875	if (!(flags & EVFLAG_NOENV)	955	if (!(flags & EVFLAG_NOENV)
876	&& !enable_secure ()	956	&& !enable_secure ()
877	&& getenv ("LIBEV_FLAGS"))	957	&& getenv ("LIBEV_FLAGS"))
878	flags = atoi (getenv ("LIBEV_FLAGS"));	958	flags = atoi (getenv ("LIBEV_FLAGS"));
879		959
880	if (!(flags & 0x0000ffffUL))	960	if (!(flags & 0x0000ffffUL))
881	flags \|= ev_recommended_backends ();	961	flags \|= ev_recommended_backends ();
882		962
883	backend = 0;	963	backend = 0;
		964	backend_fd = -1;
		965	#if EV_USE_INOTIFY
		966	fs_fd = -2;
		967	#endif
		968
884	#if EV_USE_PORT	969	#if EV_USE_PORT
885	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	970	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
886	#endif	971	#endif
887	#if EV_USE_KQUEUE	972	#if EV_USE_KQUEUE
888	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);	973	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
…		…
900	ev_init (&sigev, sigcb);	985	ev_init (&sigev, sigcb);
901	ev_set_priority (&sigev, EV_MAXPRI);	986	ev_set_priority (&sigev, EV_MAXPRI);
902	}	987	}
903	}	988	}
904		989
905	static void	990	static void noinline
906	loop_destroy (EV_P)	991	loop_destroy (EV_P)
907	{	992	{
908	int i;	993	int i;
		994
		995	#if EV_USE_INOTIFY
		996	if (fs_fd >= 0)
		997	close (fs_fd);
		998	#endif
		999
		1000	if (backend_fd >= 0)
		1001	close (backend_fd);
909		1002
910	#if EV_USE_PORT	1003	#if EV_USE_PORT
911	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);	1004	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
912	#endif	1005	#endif
913	#if EV_USE_KQUEUE	1006	#if EV_USE_KQUEUE
…		…
922	#if EV_USE_SELECT	1015	#if EV_USE_SELECT
923	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);	1016	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
924	#endif	1017	#endif
925		1018
926	for (i = NUMPRI; i--; )	1019	for (i = NUMPRI; i--; )
		1020	{
927	array_free (pending, [i]);	1021	array_free (pending, [i]);
		1022	#if EV_IDLE_ENABLE
		1023	array_free (idle, [i]);
		1024	#endif
		1025	}
928		1026
929	/* have to use the microsoft-never-gets-it-right macro */	1027	/* have to use the microsoft-never-gets-it-right macro */
930	array_free (fdchange, EMPTY0);	1028	array_free (fdchange, EMPTY);
931	array_free (timer, EMPTY0);	1029	array_free (timer, EMPTY);
932	#if EV_PERIODIC_ENABLE	1030	#if EV_PERIODIC_ENABLE
933	array_free (periodic, EMPTY0);	1031	array_free (periodic, EMPTY);
934	#endif	1032	#endif
935	array_free (idle, EMPTY0);
936	array_free (prepare, EMPTY0);	1033	array_free (prepare, EMPTY);
937	array_free (check, EMPTY0);	1034	array_free (check, EMPTY);
938		1035
939	backend = 0;	1036	backend = 0;
940	}	1037	}
941		1038
942	static void	1039	void inline_size infy_fork (EV_P);
		1040
		1041	void inline_size
943	loop_fork (EV_P)	1042	loop_fork (EV_P)
944	{	1043	{
945	#if EV_USE_PORT	1044	#if EV_USE_PORT
946	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1045	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
947	#endif	1046	#endif
948	#if EV_USE_KQUEUE	1047	#if EV_USE_KQUEUE
949	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);	1048	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
950	#endif	1049	#endif
951	#if EV_USE_EPOLL	1050	#if EV_USE_EPOLL
952	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);	1051	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1052	#endif
		1053	#if EV_USE_INOTIFY
		1054	infy_fork (EV_A);
953	#endif	1055	#endif
954		1056
955	if (ev_is_active (&sigev))	1057	if (ev_is_active (&sigev))
956	{	1058	{
957	/* default loop */	1059	/* default loop */
…		…
1073	postfork = 1;	1175	postfork = 1;
1074	}	1176	}
1075		1177
1076	/*****************************************************************************/	1178	/*****************************************************************************/
1077		1179
1078	int inline_size	1180	void
1079	any_pending (EV_P)	1181	ev_invoke (EV_P_ void *w, int revents)
1080	{	1182	{
1081	int pri;	1183	EV_CB_INVOKE ((W)w, revents);
1082
1083	for (pri = NUMPRI; pri--; )
1084	if (pendingcnt [pri])
1085	return 1;
1086
1087	return 0;
1088	}	1184	}
1089		1185
1090	void inline_speed	1186	void inline_speed
1091	call_pending (EV_P)	1187	call_pending (EV_P)
1092	{	1188	{
…		…
1097	{	1193	{
1098	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1194	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1099		1195
1100	if (expect_true (p->w))	1196	if (expect_true (p->w))
1101	{	1197	{
1102	assert (("non-pending watcher on pending list", p->w->pending));	1198	/assert (("non-pending watcher on pending list", p->w->pending));/
1103		1199
1104	p->w->pending = 0;	1200	p->w->pending = 0;
1105	EV_CB_INVOKE (p->w, p->events);	1201	EV_CB_INVOKE (p->w, p->events);
1106	}	1202	}
1107	}	1203	}
…		…
1112	{	1208	{
1113	while (timercnt && ((WT)timers [0])->at <= mn_now)	1209	while (timercnt && ((WT)timers [0])->at <= mn_now)
1114	{	1210	{
1115	ev_timer *w = timers [0];	1211	ev_timer *w = timers [0];
1116		1212
1117	assert (("inactive timer on timer heap detected", ev_is_active (w)));	1213	/assert (("inactive timer on timer heap detected", ev_is_active (w)));/
1118		1214
1119	/* first reschedule or stop timer */	1215	/* first reschedule or stop timer */
1120	if (w->repeat)	1216	if (w->repeat)
1121	{	1217	{
1122	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1218	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
…		…
1140	{	1236	{
1141	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)	1237	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1142	{	1238	{
1143	ev_periodic *w = periodics [0];	1239	ev_periodic *w = periodics [0];
1144		1240
1145	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	1241	/assert (("inactive timer on periodic heap detected", ev_is_active (w)));/
1146		1242
1147	/* first reschedule or stop timer */	1243	/* first reschedule or stop timer */
1148	if (w->reschedule_cb)	1244	if (w->reschedule_cb)
1149	{	1245	{
1150	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);	1246	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1151	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));	1247	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1152	downheap ((WT *)periodics, periodiccnt, 0);	1248	downheap ((WT *)periodics, periodiccnt, 0);
1153	}	1249	}
1154	else if (w->interval)	1250	else if (w->interval)
1155	{	1251	{
1156	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;	1252	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1253	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1157	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));	1254	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1158	downheap ((WT *)periodics, periodiccnt, 0);	1255	downheap ((WT *)periodics, periodiccnt, 0);
1159	}	1256	}
1160	else	1257	else
1161	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1258	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
…		…
1175	ev_periodic *w = periodics [i];	1272	ev_periodic *w = periodics [i];
1176		1273
1177	if (w->reschedule_cb)	1274	if (w->reschedule_cb)
1178	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	1275	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1179	else if (w->interval)	1276	else if (w->interval)
1180	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	1277	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1181	}	1278	}
1182		1279
1183	/* now rebuild the heap */	1280	/* now rebuild the heap */
1184	for (i = periodiccnt >> 1; i--; )	1281	for (i = periodiccnt >> 1; i--; )
1185	downheap ((WT *)periodics, periodiccnt, i);	1282	downheap ((WT *)periodics, periodiccnt, i);
1186	}	1283	}
1187	#endif	1284	#endif
1188		1285
		1286	#if EV_IDLE_ENABLE
1189	int inline_size	1287	void inline_size
1190	time_update_monotonic (EV_P)	1288	idle_reify (EV_P)
1191	{	1289	{
		1290	if (expect_false (idleall))
		1291	{
		1292	int pri;
		1293
		1294	for (pri = NUMPRI; pri--; )
		1295	{
		1296	if (pendingcnt [pri])
		1297	break;
		1298
		1299	if (idlecnt [pri])
		1300	{
		1301	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1302	break;
		1303	}
		1304	}
		1305	}
		1306	}
		1307	#endif
		1308
		1309	void inline_speed
		1310	time_update (EV_P_ ev_tstamp max_block)
		1311	{
		1312	int i;
		1313
		1314	#if EV_USE_MONOTONIC
		1315	if (expect_true (have_monotonic))
		1316	{
		1317	ev_tstamp odiff = rtmn_diff;
		1318
1192	mn_now = get_clock ();	1319	mn_now = get_clock ();
1193		1320
		1321	/* only fetch the realtime clock every 0.5MIN_TIMEJUMP seconds /
		1322	/* interpolate in the meantime */
1194	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1323	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1195	{	1324	{
1196	ev_rt_now = rtmn_diff + mn_now;	1325	ev_rt_now = rtmn_diff + mn_now;
1197	return 0;	1326	return;
1198	}	1327	}
1199	else	1328
1200	{
1201	now_floor = mn_now;	1329	now_floor = mn_now;
1202	ev_rt_now = ev_time ();	1330	ev_rt_now = ev_time ();
1203	return 1;
1204	}
1205	}
1206		1331
1207	void inline_size	1332	/* loop a few times, before making important decisions.
1208	time_update (EV_P)	1333	* on the choice of "4": one iteration isn't enough,
1209	{	1334	* in case we get preempted during the calls to
1210	int i;	1335	* ev_time and get_clock. a second call is almost guaranteed
1211		1336	* to succeed in that case, though. and looping a few more times
1212	#if EV_USE_MONOTONIC	1337	* doesn't hurt either as we only do this on time-jumps or
1213	if (expect_true (have_monotonic))	1338	* in the unlikely event of having been preempted here.
1214	{	1339	*/
1215	if (time_update_monotonic (EV_A))	1340	for (i = 4; --i; )
1216	{	1341	{
1217	ev_tstamp odiff = rtmn_diff;
1218
1219	/* loop a few times, before making important decisions.
1220	* on the choice of "4": one iteration isn't enough,
1221	* in case we get preempted during the calls to
1222	* ev_time and get_clock. a second call is almost guarenteed
1223	* to succeed in that case, though. and looping a few more times
1224	* doesn't hurt either as we only do this on time-jumps or
1225	* in the unlikely event of getting preempted here.
1226	*/
1227	for (i = 4; --i; )
1228	{
1229	rtmn_diff = ev_rt_now - mn_now;	1342	rtmn_diff = ev_rt_now - mn_now;
1230		1343
1231	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1344	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
1232	return; /* all is well */	1345	return; /* all is well */
1233		1346
1234	ev_rt_now = ev_time ();	1347	ev_rt_now = ev_time ();
1235	mn_now = get_clock ();	1348	mn_now = get_clock ();
1236	now_floor = mn_now;	1349	now_floor = mn_now;
1237	}	1350	}
1238		1351
1239	# if EV_PERIODIC_ENABLE	1352	# if EV_PERIODIC_ENABLE
1240	periodics_reschedule (EV_A);	1353	periodics_reschedule (EV_A);
1241	# endif	1354	# endif
1242	/* no timer adjustment, as the monotonic clock doesn't jump */	1355	/* no timer adjustment, as the monotonic clock doesn't jump */
1243	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */	1356	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1244	}
1245	}	1357	}
1246	else	1358	else
1247	#endif	1359	#endif
1248	{	1360	{
1249	ev_rt_now = ev_time ();	1361	ev_rt_now = ev_time ();
1250		1362
1251	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1363	if (expect_false (mn_now > ev_rt_now \|\| ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1252	{	1364	{
1253	#if EV_PERIODIC_ENABLE	1365	#if EV_PERIODIC_ENABLE
1254	periodics_reschedule (EV_A);	1366	periodics_reschedule (EV_A);
1255	#endif	1367	#endif
1256
1257	/* adjust timers. this is easy, as the offset is the same for all */	1368	/* adjust timers. this is easy, as the offset is the same for all of them */
1258	for (i = 0; i < timercnt; ++i)	1369	for (i = 0; i < timercnt; ++i)
1259	((WT)timers [i])->at += ev_rt_now - mn_now;	1370	((WT)timers [i])->at += ev_rt_now - mn_now;
1260	}	1371	}
1261		1372
1262	mn_now = ev_rt_now;	1373	mn_now = ev_rt_now;
…		…
1282	{	1393	{
1283	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)	1394	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)
1284	? EVUNLOOP_ONE	1395	? EVUNLOOP_ONE
1285	: EVUNLOOP_CANCEL;	1396	: EVUNLOOP_CANCEL;
1286		1397
1287	while (activecnt)	1398	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
		1399
		1400	do
1288	{	1401	{
1289	/* we might have forked, so reify kernel state if necessary */	1402	#ifndef _WIN32
		1403	if (expect_false (curpid)) /* penalise the forking check even more */
		1404	if (expect_false (getpid () != curpid))
		1405	{
		1406	curpid = getpid ();
		1407	postfork = 1;
		1408	}
		1409	#endif
		1410
1290	#if EV_FORK_ENABLE	1411	#if EV_FORK_ENABLE
		1412	/* we might have forked, so queue fork handlers */
1291	if (expect_false (postfork))	1413	if (expect_false (postfork))
1292	if (forkcnt)	1414	if (forkcnt)
1293	{	1415	{
1294	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);	1416	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1295	call_pending (EV_A);	1417	call_pending (EV_A);
1296	}	1418	}
1297	#endif	1419	#endif
1298		1420
1299	/* queue check watchers (and execute them) */	1421	/* queue prepare watchers (and execute them) */
1300	if (expect_false (preparecnt))	1422	if (expect_false (preparecnt))
1301	{	1423	{
1302	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1424	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1303	call_pending (EV_A);	1425	call_pending (EV_A);
1304	}	1426	}
1305		1427
		1428	if (expect_false (!activecnt))
		1429	break;
		1430
1306	/* we might have forked, so reify kernel state if necessary */	1431	/* we might have forked, so reify kernel state if necessary */
1307	if (expect_false (postfork))	1432	if (expect_false (postfork))
1308	loop_fork (EV_A);	1433	loop_fork (EV_A);
1309		1434
1310	/* update fd-related kernel structures */	1435	/* update fd-related kernel structures */
1311	fd_reify (EV_A);	1436	fd_reify (EV_A);
1312		1437
1313	/* calculate blocking time */	1438	/* calculate blocking time */
1314	{	1439	{
1315	double block;	1440	ev_tstamp block;
1316		1441
1317	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1442	if (expect_false (flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt))
1318	block = 0.; /* do not block at all */	1443	block = 0.; /* do not block at all */
1319	else	1444	else
1320	{	1445	{
1321	/* update time to cancel out callback processing overhead */	1446	/* update time to cancel out callback processing overhead */
1322	#if EV_USE_MONOTONIC
1323	if (expect_true (have_monotonic))
1324	time_update_monotonic (EV_A);	1447	time_update (EV_A_ 1e100);
1325	else
1326	#endif
1327	{
1328	ev_rt_now = ev_time ();
1329	mn_now = ev_rt_now;
1330	}
1331		1448
1332	block = MAX_BLOCKTIME;	1449	block = MAX_BLOCKTIME;
1333		1450
1334	if (timercnt)	1451	if (timercnt)
1335	{	1452	{
…		…
1346	#endif	1463	#endif
1347		1464
1348	if (expect_false (block < 0.)) block = 0.;	1465	if (expect_false (block < 0.)) block = 0.;
1349	}	1466	}
1350		1467
		1468	++loop_count;
1351	backend_poll (EV_A_ block);	1469	backend_poll (EV_A_ block);
		1470
		1471	/* update ev_rt_now, do magic */
		1472	time_update (EV_A_ block);
1352	}	1473	}
1353
1354	/* update ev_rt_now, do magic */
1355	time_update (EV_A);
1356		1474
1357	/* queue pending timers and reschedule them */	1475	/* queue pending timers and reschedule them */
1358	timers_reify (EV_A); /* relative timers called last */	1476	timers_reify (EV_A); /* relative timers called last */
1359	#if EV_PERIODIC_ENABLE	1477	#if EV_PERIODIC_ENABLE
1360	periodics_reify (EV_A); /* absolute timers called first */	1478	periodics_reify (EV_A); /* absolute timers called first */
1361	#endif	1479	#endif
1362		1480
		1481	#if EV_IDLE_ENABLE
1363	/* queue idle watchers unless other events are pending */	1482	/* queue idle watchers unless other events are pending */
1364	if (idlecnt && !any_pending (EV_A))	1483	idle_reify (EV_A);
1365	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	1484	#endif
1366		1485
1367	/* queue check watchers, to be executed first */	1486	/* queue check watchers, to be executed first */
1368	if (expect_false (checkcnt))	1487	if (expect_false (checkcnt))
1369	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1488	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1370		1489
1371	call_pending (EV_A);	1490	call_pending (EV_A);
1372		1491
1373	if (expect_false (loop_done))
1374	break;
1375	}	1492	}
		1493	while (expect_true (activecnt && !loop_done));
1376		1494
1377	if (loop_done == EVUNLOOP_ONE)	1495	if (loop_done == EVUNLOOP_ONE)
1378	loop_done = EVUNLOOP_CANCEL;	1496	loop_done = EVUNLOOP_CANCEL;
1379	}	1497	}
1380		1498
…		…
1407	head = &(*head)->next;	1525	head = &(*head)->next;
1408	}	1526	}
1409	}	1527	}
1410		1528
1411	void inline_speed	1529	void inline_speed
1412	ev_clear_pending (EV_P_ W w)	1530	clear_pending (EV_P_ W w)
1413	{	1531	{
1414	if (w->pending)	1532	if (w->pending)
1415	{	1533	{
1416	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1534	pendings [ABSPRI (w)][w->pending - 1].w = 0;
1417	w->pending = 0;	1535	w->pending = 0;
1418	}	1536	}
1419	}	1537	}
1420		1538
		1539	int
		1540	ev_clear_pending (EV_P_ void *w)
		1541	{
		1542	W w_ = (W)w;
		1543	int pending = w_->pending;
		1544
		1545	if (expect_true (pending))
		1546	{
		1547	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1548	w_->pending = 0;
		1549	p->w = 0;
		1550	return p->events;
		1551	}
		1552	else
		1553	return 0;
		1554	}
		1555
		1556	void inline_size
		1557	pri_adjust (EV_P_ W w)
		1558	{
		1559	int pri = w->priority;
		1560	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1561	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1562	w->priority = pri;
		1563	}
		1564
1421	void inline_speed	1565	void inline_speed
1422	ev_start (EV_P_ W w, int active)	1566	ev_start (EV_P_ W w, int active)
1423	{	1567	{
1424	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1568	pri_adjust (EV_A_ w);
1425	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1426
1427	w->active = active;	1569	w->active = active;
1428	ev_ref (EV_A);	1570	ev_ref (EV_A);
1429	}	1571	}
1430		1572
1431	void inline_size	1573	void inline_size
…		…
1435	w->active = 0;	1577	w->active = 0;
1436	}	1578	}
1437		1579
1438	/*****************************************************************************/	1580	/*****************************************************************************/
1439		1581
1440	void	1582	void noinline
1441	ev_io_start (EV_P_ ev_io *w)	1583	ev_io_start (EV_P_ ev_io *w)
1442	{	1584	{
1443	int fd = w->fd;	1585	int fd = w->fd;
1444		1586
1445	if (expect_false (ev_is_active (w)))	1587	if (expect_false (ev_is_active (w)))
…		…
1452	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1594	wlist_add ((WL *)&anfds[fd].head, (WL)w);
1453		1595
1454	fd_change (EV_A_ fd);	1596	fd_change (EV_A_ fd);
1455	}	1597	}
1456		1598
1457	void	1599	void noinline
1458	ev_io_stop (EV_P_ ev_io *w)	1600	ev_io_stop (EV_P_ ev_io *w)
1459	{	1601	{
1460	ev_clear_pending (EV_A_ (W)w);	1602	clear_pending (EV_A_ (W)w);
1461	if (expect_false (!ev_is_active (w)))	1603	if (expect_false (!ev_is_active (w)))
1462	return;	1604	return;
1463		1605
1464	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	1606	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1465		1607
…		…
1467	ev_stop (EV_A_ (W)w);	1609	ev_stop (EV_A_ (W)w);
1468		1610
1469	fd_change (EV_A_ w->fd);	1611	fd_change (EV_A_ w->fd);
1470	}	1612	}
1471		1613
1472	void	1614	void noinline
1473	ev_timer_start (EV_P_ ev_timer *w)	1615	ev_timer_start (EV_P_ ev_timer *w)
1474	{	1616	{
1475	if (expect_false (ev_is_active (w)))	1617	if (expect_false (ev_is_active (w)))
1476	return;	1618	return;
1477		1619
…		…
1482	ev_start (EV_A_ (W)w, ++timercnt);	1624	ev_start (EV_A_ (W)w, ++timercnt);
1483	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);	1625	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
1484	timers [timercnt - 1] = w;	1626	timers [timercnt - 1] = w;
1485	upheap ((WT *)timers, timercnt - 1);	1627	upheap ((WT *)timers, timercnt - 1);
1486		1628
		1629	/assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));/
		1630	}
		1631
		1632	void noinline
		1633	ev_timer_stop (EV_P_ ev_timer *w)
		1634	{
		1635	clear_pending (EV_A_ (W)w);
		1636	if (expect_false (!ev_is_active (w)))
		1637	return;
		1638
1487	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	1639	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1488	}
1489		1640
1490	void	1641	{
1491	ev_timer_stop (EV_P_ ev_timer *w)	1642	int active = ((W)w)->active;
1492	{
1493	ev_clear_pending (EV_A_ (W)w);
1494	if (expect_false (!ev_is_active (w)))
1495	return;
1496		1643
1497	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1498
1499	if (expect_true (((W)w)->active < timercnt--))	1644	if (expect_true (--active < --timercnt))
1500	{	1645	{
1501	timers [((W)w)->active - 1] = timers [timercnt];	1646	timers [active] = timers [timercnt];
1502	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	1647	adjustheap ((WT *)timers, timercnt, active);
1503	}	1648	}
		1649	}
1504		1650
1505	((WT)w)->at -= mn_now;	1651	((WT)w)->at -= mn_now;
1506		1652
1507	ev_stop (EV_A_ (W)w);	1653	ev_stop (EV_A_ (W)w);
1508	}	1654	}
1509		1655
1510	void	1656	void noinline
1511	ev_timer_again (EV_P_ ev_timer *w)	1657	ev_timer_again (EV_P_ ev_timer *w)
1512	{	1658	{
1513	if (ev_is_active (w))	1659	if (ev_is_active (w))
1514	{	1660	{
1515	if (w->repeat)	1661	if (w->repeat)
…		…
1526	ev_timer_start (EV_A_ w);	1672	ev_timer_start (EV_A_ w);
1527	}	1673	}
1528	}	1674	}
1529		1675
1530	#if EV_PERIODIC_ENABLE	1676	#if EV_PERIODIC_ENABLE
1531	void	1677	void noinline
1532	ev_periodic_start (EV_P_ ev_periodic *w)	1678	ev_periodic_start (EV_P_ ev_periodic *w)
1533	{	1679	{
1534	if (expect_false (ev_is_active (w)))	1680	if (expect_false (ev_is_active (w)))
1535	return;	1681	return;
1536		1682
…		…
1538	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	1684	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1539	else if (w->interval)	1685	else if (w->interval)
1540	{	1686	{
1541	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1687	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1542	/* this formula differs from the one in periodic_reify because we do not always round up */	1688	/* this formula differs from the one in periodic_reify because we do not always round up */
1543	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	1689	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1544	}	1690	}
		1691	else
		1692	((WT)w)->at = w->offset;
1545		1693
1546	ev_start (EV_A_ (W)w, ++periodiccnt);	1694	ev_start (EV_A_ (W)w, ++periodiccnt);
1547	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);	1695	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
1548	periodics [periodiccnt - 1] = w;	1696	periodics [periodiccnt - 1] = w;
1549	upheap ((WT *)periodics, periodiccnt - 1);	1697	upheap ((WT *)periodics, periodiccnt - 1);
1550		1698
		1699	/assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));/
		1700	}
		1701
		1702	void noinline
		1703	ev_periodic_stop (EV_P_ ev_periodic *w)
		1704	{
		1705	clear_pending (EV_A_ (W)w);
		1706	if (expect_false (!ev_is_active (w)))
		1707	return;
		1708
1551	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	1709	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1552	}
1553		1710
1554	void	1711	{
1555	ev_periodic_stop (EV_P_ ev_periodic *w)	1712	int active = ((W)w)->active;
1556	{
1557	ev_clear_pending (EV_A_ (W)w);
1558	if (expect_false (!ev_is_active (w)))
1559	return;
1560		1713
1561	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1562
1563	if (expect_true (((W)w)->active < periodiccnt--))	1714	if (expect_true (--active < --periodiccnt))
1564	{	1715	{
1565	periodics [((W)w)->active - 1] = periodics [periodiccnt];	1716	periodics [active] = periodics [periodiccnt];
1566	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	1717	adjustheap ((WT *)periodics, periodiccnt, active);
1567	}	1718	}
		1719	}
1568		1720
1569	ev_stop (EV_A_ (W)w);	1721	ev_stop (EV_A_ (W)w);
1570	}	1722	}
1571		1723
1572	void	1724	void noinline
1573	ev_periodic_again (EV_P_ ev_periodic *w)	1725	ev_periodic_again (EV_P_ ev_periodic *w)
1574	{	1726	{
1575	/* TODO: use adjustheap and recalculation */	1727	/* TODO: use adjustheap and recalculation */
1576	ev_periodic_stop (EV_A_ w);	1728	ev_periodic_stop (EV_A_ w);
1577	ev_periodic_start (EV_A_ w);	1729	ev_periodic_start (EV_A_ w);
…		…
1580		1732
1581	#ifndef SA_RESTART	1733	#ifndef SA_RESTART
1582	# define SA_RESTART 0	1734	# define SA_RESTART 0
1583	#endif	1735	#endif
1584		1736
1585	void	1737	void noinline
1586	ev_signal_start (EV_P_ ev_signal *w)	1738	ev_signal_start (EV_P_ ev_signal *w)
1587	{	1739	{
1588	#if EV_MULTIPLICITY	1740	#if EV_MULTIPLICITY
1589	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));	1741	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1590	#endif	1742	#endif
…		…
1609	sigaction (w->signum, &sa, 0);	1761	sigaction (w->signum, &sa, 0);
1610	#endif	1762	#endif
1611	}	1763	}
1612	}	1764	}
1613		1765
1614	void	1766	void noinline
1615	ev_signal_stop (EV_P_ ev_signal *w)	1767	ev_signal_stop (EV_P_ ev_signal *w)
1616	{	1768	{
1617	ev_clear_pending (EV_A_ (W)w);	1769	clear_pending (EV_A_ (W)w);
1618	if (expect_false (!ev_is_active (w)))	1770	if (expect_false (!ev_is_active (w)))
1619	return;	1771	return;
1620		1772
1621	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1773	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1622	ev_stop (EV_A_ (W)w);	1774	ev_stop (EV_A_ (W)w);
…		…
1639	}	1791	}
1640		1792
1641	void	1793	void
1642	ev_child_stop (EV_P_ ev_child *w)	1794	ev_child_stop (EV_P_ ev_child *w)
1643	{	1795	{
1644	ev_clear_pending (EV_A_ (W)w);	1796	clear_pending (EV_A_ (W)w);
1645	if (expect_false (!ev_is_active (w)))	1797	if (expect_false (!ev_is_active (w)))
1646	return;	1798	return;
1647		1799
1648	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	1800	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1649	ev_stop (EV_A_ (W)w);	1801	ev_stop (EV_A_ (W)w);
…		…
1657	# endif	1809	# endif
1658		1810
1659	#define DEF_STAT_INTERVAL 5.0074891	1811	#define DEF_STAT_INTERVAL 5.0074891
1660	#define MIN_STAT_INTERVAL 0.1074891	1812	#define MIN_STAT_INTERVAL 0.1074891
1661		1813
		1814	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1815
		1816	#if EV_USE_INOTIFY
		1817	# define EV_INOTIFY_BUFSIZE 8192
		1818
		1819	static void noinline
		1820	infy_add (EV_P_ ev_stat *w)
		1821	{
		1822	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);
		1823
		1824	if (w->wd < 0)
		1825	{
		1826	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1827
		1828	/* monitor some parent directory for speedup hints */
		1829	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)
		1830	{
		1831	char path [4096];
		1832	strcpy (path, w->path);
		1833
		1834	do
		1835	{
		1836	int mask = IN_MASK_ADD \| IN_DELETE_SELF \| IN_MOVE_SELF
		1837	\| (errno == EACCES ? IN_ATTRIB : IN_CREATE \| IN_MOVED_TO);
		1838
		1839	char *pend = strrchr (path, '/');
		1840
		1841	if (!pend)
		1842	break; /* whoops, no '/', complain to your admin */
		1843
		1844	*pend = 0;
		1845	w->wd = inotify_add_watch (fs_fd, path, mask);
		1846	}
		1847	while (w->wd < 0 && (errno == ENOENT \|\| errno == EACCES));
		1848	}
		1849	}
		1850	else
		1851	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1852
		1853	if (w->wd >= 0)
		1854	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1855	}
		1856
		1857	static void noinline
		1858	infy_del (EV_P_ ev_stat *w)
		1859	{
		1860	int slot;
		1861	int wd = w->wd;
		1862
		1863	if (wd < 0)
		1864	return;
		1865
		1866	w->wd = -2;
		1867	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1868	wlist_del (&fs_hash [slot].head, (WL)w);
		1869
		1870	/* remove this watcher, if others are watching it, they will rearm */
		1871	inotify_rm_watch (fs_fd, wd);
		1872	}
		1873
		1874	static void noinline
		1875	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1876	{
		1877	if (slot < 0)
		1878	/* overflow, need to check for all hahs slots */
		1879	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1880	infy_wd (EV_A_ slot, wd, ev);
		1881	else
		1882	{
		1883	WL w_;
		1884
		1885	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1886	{
		1887	ev_stat w = (ev_stat )w_;
		1888	w_ = w_->next; /* lets us remove this watcher and all before it */
		1889
		1890	if (w->wd == wd \|\| wd == -1)
		1891	{
		1892	if (ev->mask & (IN_IGNORED \| IN_UNMOUNT \| IN_DELETE_SELF))
		1893	{
		1894	w->wd = -1;
		1895	infy_add (EV_A_ w); /* re-add, no matter what */
		1896	}
		1897
		1898	stat_timer_cb (EV_A_ &w->timer, 0);
		1899	}
		1900	}
		1901	}
		1902	}
		1903
		1904	static void
		1905	infy_cb (EV_P_ ev_io *w, int revents)
		1906	{
		1907	char buf [EV_INOTIFY_BUFSIZE];
		1908	struct inotify_event ev = (struct inotify_event )buf;
		1909	int ofs;
		1910	int len = read (fs_fd, buf, sizeof (buf));
		1911
		1912	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1913	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1914	}
		1915
		1916	void inline_size
		1917	infy_init (EV_P)
		1918	{
		1919	if (fs_fd != -2)
		1920	return;
		1921
		1922	fs_fd = inotify_init ();
		1923
		1924	if (fs_fd >= 0)
		1925	{
		1926	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1927	ev_set_priority (&fs_w, EV_MAXPRI);
		1928	ev_io_start (EV_A_ &fs_w);
		1929	}
		1930	}
		1931
		1932	void inline_size
		1933	infy_fork (EV_P)
		1934	{
		1935	int slot;
		1936
		1937	if (fs_fd < 0)
		1938	return;
		1939
		1940	close (fs_fd);
		1941	fs_fd = inotify_init ();
		1942
		1943	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1944	{
		1945	WL w_ = fs_hash [slot].head;
		1946	fs_hash [slot].head = 0;
		1947
		1948	while (w_)
		1949	{
		1950	ev_stat w = (ev_stat )w_;
		1951	w_ = w_->next; /* lets us add this watcher */
		1952
		1953	w->wd = -1;
		1954
		1955	if (fs_fd >= 0)
		1956	infy_add (EV_A_ w); /* re-add, no matter what */
		1957	else
		1958	ev_timer_start (EV_A_ &w->timer);
		1959	}
		1960
		1961	}
		1962	}
		1963
		1964	#endif
		1965
1662	void	1966	void
1663	ev_stat_stat (EV_P_ ev_stat *w)	1967	ev_stat_stat (EV_P_ ev_stat *w)
1664	{	1968	{
1665	if (lstat (w->path, &w->attr) < 0)	1969	if (lstat (w->path, &w->attr) < 0)
1666	w->attr.st_nlink = 0;	1970	w->attr.st_nlink = 0;
1667	else if (!w->attr.st_nlink)	1971	else if (!w->attr.st_nlink)
1668	w->attr.st_nlink = 1;	1972	w->attr.st_nlink = 1;
1669	}	1973	}
1670		1974
1671	static void	1975	static void noinline
1672	stat_timer_cb (EV_P_ ev_timer *w_, int revents)	1976	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1673	{	1977	{
1674	ev_stat w = (ev_stat )(((char *)w_) - offsetof (ev_stat, timer));	1978	ev_stat w = (ev_stat )(((char *)w_) - offsetof (ev_stat, timer));
1675		1979
1676	/* we copy this here each the time so that */	1980	/* we copy this here each the time so that */
1677	/* prev has the old value when the callback gets invoked */	1981	/* prev has the old value when the callback gets invoked */
1678	w->prev = w->attr;	1982	w->prev = w->attr;
1679	ev_stat_stat (EV_A_ w);	1983	ev_stat_stat (EV_A_ w);
1680		1984
1681	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))	1985	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		1986	if (
		1987	w->prev.st_dev != w->attr.st_dev
		1988	\|\| w->prev.st_ino != w->attr.st_ino
		1989	\|\| w->prev.st_mode != w->attr.st_mode
		1990	\|\| w->prev.st_nlink != w->attr.st_nlink
		1991	\|\| w->prev.st_uid != w->attr.st_uid
		1992	\|\| w->prev.st_gid != w->attr.st_gid
		1993	\|\| w->prev.st_rdev != w->attr.st_rdev
		1994	\|\| w->prev.st_size != w->attr.st_size
		1995	\|\| w->prev.st_atime != w->attr.st_atime
		1996	\|\| w->prev.st_mtime != w->attr.st_mtime
		1997	\|\| w->prev.st_ctime != w->attr.st_ctime
		1998	) {
		1999	#if EV_USE_INOTIFY
		2000	infy_del (EV_A_ w);
		2001	infy_add (EV_A_ w);
		2002	ev_stat_stat (EV_A_ w); /* avoid race... */
		2003	#endif
		2004
1682	ev_feed_event (EV_A_ w, EV_STAT);	2005	ev_feed_event (EV_A_ w, EV_STAT);
		2006	}
1683	}	2007	}
1684		2008
1685	void	2009	void
1686	ev_stat_start (EV_P_ ev_stat *w)	2010	ev_stat_start (EV_P_ ev_stat *w)
1687	{	2011	{
…		…
1697	if (w->interval < MIN_STAT_INTERVAL)	2021	if (w->interval < MIN_STAT_INTERVAL)
1698	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;	2022	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
1699		2023
1700	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);	2024	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
1701	ev_set_priority (&w->timer, ev_priority (w));	2025	ev_set_priority (&w->timer, ev_priority (w));
		2026
		2027	#if EV_USE_INOTIFY
		2028	infy_init (EV_A);
		2029
		2030	if (fs_fd >= 0)
		2031	infy_add (EV_A_ w);
		2032	else
		2033	#endif
1702	ev_timer_start (EV_A_ &w->timer);	2034	ev_timer_start (EV_A_ &w->timer);
1703		2035
1704	ev_start (EV_A_ (W)w, 1);	2036	ev_start (EV_A_ (W)w, 1);
1705	}	2037	}
1706		2038
1707	void	2039	void
1708	ev_stat_stop (EV_P_ ev_stat *w)	2040	ev_stat_stop (EV_P_ ev_stat *w)
1709	{	2041	{
1710	ev_clear_pending (EV_A_ (W)w);	2042	clear_pending (EV_A_ (W)w);
1711	if (expect_false (!ev_is_active (w)))	2043	if (expect_false (!ev_is_active (w)))
1712	return;	2044	return;
1713		2045
		2046	#if EV_USE_INOTIFY
		2047	infy_del (EV_A_ w);
		2048	#endif
1714	ev_timer_stop (EV_A_ &w->timer);	2049	ev_timer_stop (EV_A_ &w->timer);
1715		2050
1716	ev_stop (EV_A_ (W)w);	2051	ev_stop (EV_A_ (W)w);
1717	}	2052	}
1718	#endif	2053	#endif
1719		2054
		2055	#if EV_IDLE_ENABLE
1720	void	2056	void
1721	ev_idle_start (EV_P_ ev_idle *w)	2057	ev_idle_start (EV_P_ ev_idle *w)
1722	{	2058	{
1723	if (expect_false (ev_is_active (w)))	2059	if (expect_false (ev_is_active (w)))
1724	return;	2060	return;
1725		2061
		2062	pri_adjust (EV_A_ (W)w);
		2063
		2064	{
		2065	int active = ++idlecnt [ABSPRI (w)];
		2066
		2067	++idleall;
1726	ev_start (EV_A_ (W)w, ++idlecnt);	2068	ev_start (EV_A_ (W)w, active);
		2069
1727	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);	2070	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
1728	idles [idlecnt - 1] = w;	2071	idles [ABSPRI (w)][active - 1] = w;
		2072	}
1729	}	2073	}
1730		2074
1731	void	2075	void
1732	ev_idle_stop (EV_P_ ev_idle *w)	2076	ev_idle_stop (EV_P_ ev_idle *w)
1733	{	2077	{
1734	ev_clear_pending (EV_A_ (W)w);	2078	clear_pending (EV_A_ (W)w);
1735	if (expect_false (!ev_is_active (w)))	2079	if (expect_false (!ev_is_active (w)))
1736	return;	2080	return;
1737		2081
1738	{	2082	{
1739	int active = ((W)w)->active;	2083	int active = ((W)w)->active;
1740	idles [active - 1] = idles [--idlecnt];	2084
		2085	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
1741	((W)idles [active - 1])->active = active;	2086	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2087
		2088	ev_stop (EV_A_ (W)w);
		2089	--idleall;
1742	}	2090	}
1743
1744	ev_stop (EV_A_ (W)w);
1745	}	2091	}
		2092	#endif
1746		2093
1747	void	2094	void
1748	ev_prepare_start (EV_P_ ev_prepare *w)	2095	ev_prepare_start (EV_P_ ev_prepare *w)
1749	{	2096	{
1750	if (expect_false (ev_is_active (w)))	2097	if (expect_false (ev_is_active (w)))
…		…
1756	}	2103	}
1757		2104
1758	void	2105	void
1759	ev_prepare_stop (EV_P_ ev_prepare *w)	2106	ev_prepare_stop (EV_P_ ev_prepare *w)
1760	{	2107	{
1761	ev_clear_pending (EV_A_ (W)w);	2108	clear_pending (EV_A_ (W)w);
1762	if (expect_false (!ev_is_active (w)))	2109	if (expect_false (!ev_is_active (w)))
1763	return;	2110	return;
1764		2111
1765	{	2112	{
1766	int active = ((W)w)->active;	2113	int active = ((W)w)->active;
…		…
1783	}	2130	}
1784		2131
1785	void	2132	void
1786	ev_check_stop (EV_P_ ev_check *w)	2133	ev_check_stop (EV_P_ ev_check *w)
1787	{	2134	{
1788	ev_clear_pending (EV_A_ (W)w);	2135	clear_pending (EV_A_ (W)w);
1789	if (expect_false (!ev_is_active (w)))	2136	if (expect_false (!ev_is_active (w)))
1790	return;	2137	return;
1791		2138
1792	{	2139	{
1793	int active = ((W)w)->active;	2140	int active = ((W)w)->active;
…		…
1835	}	2182	}
1836		2183
1837	void	2184	void
1838	ev_embed_stop (EV_P_ ev_embed *w)	2185	ev_embed_stop (EV_P_ ev_embed *w)
1839	{	2186	{
1840	ev_clear_pending (EV_A_ (W)w);	2187	clear_pending (EV_A_ (W)w);
1841	if (expect_false (!ev_is_active (w)))	2188	if (expect_false (!ev_is_active (w)))
1842	return;	2189	return;
1843		2190
1844	ev_io_stop (EV_A_ &w->io);	2191	ev_io_stop (EV_A_ &w->io);
1845		2192
…		…
1860	}	2207	}
1861		2208
1862	void	2209	void
1863	ev_fork_stop (EV_P_ ev_fork *w)	2210	ev_fork_stop (EV_P_ ev_fork *w)
1864	{	2211	{
1865	ev_clear_pending (EV_A_ (W)w);	2212	clear_pending (EV_A_ (W)w);
1866	if (expect_false (!ev_is_active (w)))	2213	if (expect_false (!ev_is_active (w)))
1867	return;	2214	return;
1868		2215
1869	{	2216	{
1870	int active = ((W)w)->active;	2217	int active = ((W)w)->active;

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Comparing libev/ev.c (file contents): Revision 1.149 by root, Tue Nov 27 19:23:31 2007 UTC vs. Revision 1.178 by root, Tue Dec 11 18:36:11 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.149 by root, Tue Nov 27 19:23:31 2007 UTC vs.
Revision 1.178 by root, Tue Dec 11 18:36:11 2007 UTC