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Comparing libev/ev.c (file contents):
Revision 1.38 by root, Thu Nov 1 15:21:13 2007 UTC vs.
Revision 1.140 by root, Mon Nov 26 19:49:36 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
33	#endif	99	#endif
34		100
35	#include <math.h>	101	#include <math.h>
36	#include <stdlib.h>	102	#include <stdlib.h>
37	#include <unistd.h>
38	#include <fcntl.h>	103	#include <fcntl.h>
39	#include <signal.h>
40	#include <stddef.h>	104	#include <stddef.h>
41		105
42	#include <stdio.h>	106	#include <stdio.h>
43		107
44	#include <assert.h>	108	#include <assert.h>
45	#include <errno.h>	109	#include <errno.h>
46	#include <sys/types.h>	110	#include <sys/types.h>
47	#include <sys/wait.h>
48	#include <sys/time.h>
49	#include <time.h>	111	#include <time.h>
50		112
		113	#include <signal.h>
		114
		115	#ifndef _WIN32
		116	# include <sys/time.h>
		117	# include <sys/wait.h>
		118	# include <unistd.h>
		119	#else
		120	# define WIN32_LEAN_AND_MEAN
		121	# include <windows.h>
		122	# ifndef EV_SELECT_IS_WINSOCKET
		123	# define EV_SELECT_IS_WINSOCKET 1
		124	# endif
		125	#endif
		126
		127	/**/
		128
51	#ifndef EV_USE_MONOTONIC	129	#ifndef EV_USE_MONOTONIC
52	# define EV_USE_MONOTONIC 1	130	# define EV_USE_MONOTONIC 0
		131	#endif
		132
		133	#ifndef EV_USE_REALTIME
		134	# define EV_USE_REALTIME 0
		135	#endif
		136
		137	#ifndef EV_USE_SELECT
		138	# define EV_USE_SELECT 1
		139	#endif
		140
		141	#ifndef EV_USE_POLL
		142	# ifdef _WIN32
		143	# define EV_USE_POLL 0
		144	# else
		145	# define EV_USE_POLL 1
53	#endif	146	# endif
		147	#endif
		148
		149	#ifndef EV_USE_EPOLL
		150	# define EV_USE_EPOLL 0
		151	#endif
		152
		153	#ifndef EV_USE_KQUEUE
		154	# define EV_USE_KQUEUE 0
		155	#endif
		156
		157	#ifndef EV_USE_PORT
		158	# define EV_USE_PORT 0
		159	#endif
		160
		161	/**/
54		162
55	#ifndef CLOCK_MONOTONIC	163	#ifndef CLOCK_MONOTONIC
56	# undef EV_USE_MONOTONIC	164	# undef EV_USE_MONOTONIC
57	# define EV_USE_MONOTONIC 0	165	# define EV_USE_MONOTONIC 0
58	#endif	166	#endif
59		167
60	#ifndef EV_USE_SELECT
61	# define EV_USE_SELECT 1
62	#endif
63
64	#ifndef EV_USE_EPOLL
65	# define EV_USE_EPOLL 0
66	#endif
67
68	#ifndef CLOCK_REALTIME	168	#ifndef CLOCK_REALTIME
		169	# undef EV_USE_REALTIME
69	# define EV_USE_REALTIME 0	170	# define EV_USE_REALTIME 0
70	#endif	171	#endif
71	#ifndef EV_USE_REALTIME	172
72	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
73	#endif	175	#endif
		176
		177	/**/
74		178
75	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	179	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
76	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	180	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
77	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */	181	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
78	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	182	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
79		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
80	#include "ev.h"	187	# include "ev.h"
		188	#endif
81		189
		190	#if __GNUC__ >= 3
		191	# define expect(expr,value) __builtin_expect ((expr),(value))
		192	# define inline_size static inline /* inline for codesize */
		193	# if EV_MINIMAL
		194	# define noinline __attribute__ ((noinline))
		195	# define inline_speed static noinline
		196	# else
		197	# define noinline
		198	# define inline_speed static inline
		199	# endif
		200	#else
		201	# define expect(expr,value) (expr)
		202	# define inline_speed static
		203	# define inline_minimal static
		204	# define noinline
		205	#endif
		206
		207	#define expect_false(expr) expect ((expr) != 0, 0)
		208	#define expect_true(expr) expect ((expr) != 0, 1)
		209
		210	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		211	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		212
		213	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */
		214	#define EMPTY2(a,b) /* used to suppress some warnings */
		215
82	typedef struct ev_watcher *W;	216	typedef ev_watcher *W;
83	typedef struct ev_watcher_list *WL;	217	typedef ev_watcher_list *WL;
84	typedef struct ev_watcher_time *WT;	218	typedef ev_watcher_time *WT;
85		219
86	static ev_tstamp now, diff; /* monotonic clock */	220	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
87	ev_tstamp ev_now;
88	int ev_method;
89		221
90	static int have_monotonic; /* runtime */	222	#ifdef _WIN32
91		223	# include "ev_win32.c"
92	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	224	#endif
93	static void (*method_modify)(int fd, int oev, int nev);
94	static void (*method_poll)(ev_tstamp timeout);
95		225
96	/*****************************************************************************/	226	/*****************************************************************************/
97		227
98	ev_tstamp	228	static void (*syserr_cb)(const char *msg);
		229
		230	void ev_set_syserr_cb (void (*cb)(const char *msg))
		231	{
		232	syserr_cb = cb;
		233	}
		234
		235	static void
		236	syserr (const char *msg)
		237	{
		238	if (!msg)
		239	msg = "(libev) system error";
		240
		241	if (syserr_cb)
		242	syserr_cb (msg);
		243	else
		244	{
		245	perror (msg);
		246	abort ();
		247	}
		248	}
		249
		250	static void *(*alloc)(void *ptr, long size);
		251
		252	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		253	{
		254	alloc = cb;
		255	}
		256
		257	static void *
		258	ev_realloc (void *ptr, long size)
		259	{
		260	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		261
		262	if (!ptr && size)
		263	{
		264	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		265	abort ();
		266	}
		267
		268	return ptr;
		269	}
		270
		271	#define ev_malloc(size) ev_realloc (0, (size))
		272	#define ev_free(ptr) ev_realloc ((ptr), 0)
		273
		274	/*****************************************************************************/
		275
		276	typedef struct
		277	{
		278	WL head;
		279	unsigned char events;
		280	unsigned char reify;
		281	#if EV_SELECT_IS_WINSOCKET
		282	SOCKET handle;
		283	#endif
		284	} ANFD;
		285
		286	typedef struct
		287	{
		288	W w;
		289	int events;
		290	} ANPENDING;
		291
		292	#if EV_MULTIPLICITY
		293
		294	struct ev_loop
		295	{
		296	ev_tstamp ev_rt_now;
		297	#define ev_rt_now ((loop)->ev_rt_now)
		298	#define VAR(name,decl) decl;
		299	#include "ev_vars.h"
		300	#undef VAR
		301	};
		302	#include "ev_wrap.h"
		303
		304	static struct ev_loop default_loop_struct;
		305	struct ev_loop *ev_default_loop_ptr;
		306
		307	#else
		308
		309	ev_tstamp ev_rt_now;
		310	#define VAR(name,decl) static decl;
		311	#include "ev_vars.h"
		312	#undef VAR
		313
		314	static int ev_default_loop_ptr;
		315
		316	#endif
		317
		318	/*****************************************************************************/
		319
		320	ev_tstamp noinline
99	ev_time (void)	321	ev_time (void)
100	{	322	{
101	#if EV_USE_REALTIME	323	#if EV_USE_REALTIME
102	struct timespec ts;	324	struct timespec ts;
103	clock_gettime (CLOCK_REALTIME, &ts);	325	clock_gettime (CLOCK_REALTIME, &ts);
…		…
107	gettimeofday (&tv, 0);	329	gettimeofday (&tv, 0);
108	return tv.tv_sec + tv.tv_usec * 1e-6;	330	return tv.tv_sec + tv.tv_usec * 1e-6;
109	#endif	331	#endif
110	}	332	}
111		333
112	static ev_tstamp	334	ev_tstamp inline_size
113	get_clock (void)	335	get_clock (void)
114	{	336	{
115	#if EV_USE_MONOTONIC	337	#if EV_USE_MONOTONIC
116	if (have_monotonic)	338	if (expect_true (have_monotonic))
117	{	339	{
118	struct timespec ts;	340	struct timespec ts;
119	clock_gettime (CLOCK_MONOTONIC, &ts);	341	clock_gettime (CLOCK_MONOTONIC, &ts);
120	return ts.tv_sec + ts.tv_nsec * 1e-9;	342	return ts.tv_sec + ts.tv_nsec * 1e-9;
121	}	343	}
122	#endif	344	#endif
123		345
124	return ev_time ();	346	return ev_time ();
125	}	347	}
126		348
		349	#if EV_MULTIPLICITY
		350	ev_tstamp
		351	ev_now (EV_P)
		352	{
		353	return ev_rt_now;
		354	}
		355	#endif
		356
127	#define array_roundsize(base,n) ((n) | 4 & ~3)	357	#define array_roundsize(type,n) (((n) | 4) & ~3)
128		358
129	#define array_needsize(base,cur,cnt,init) \	359	#define array_needsize(type,base,cur,cnt,init) \
130	if ((cnt) > cur) \	360	if (expect_false ((cnt) > cur)) \
131	{ \	361	{ \
132	int newcnt = cur; \	362	int newcnt = cur; \
133	do \	363	do \
134	{ \	364	{ \
135	newcnt = array_roundsize (base, newcnt << 1); \	365	newcnt = array_roundsize (type, newcnt << 1); \
136	} \	366	} \
137	while ((cnt) > newcnt); \	367	while ((cnt) > newcnt); \
138	\	368	\
139	base = realloc (base, sizeof (*base) * (newcnt)); \	369	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
140	init (base + cur, newcnt - cur); \	370	init (base + cur, newcnt - cur); \
141	cur = newcnt; \	371	cur = newcnt; \
142	}	372	}
		373
		374	#define array_slim(type,stem) \
		375	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		376	{ \
		377	stem ## max = array_roundsize (stem ## cnt >> 1); \
		378	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		379	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		380	}
		381
		382	#define array_free(stem, idx) \
		383	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
143		384
144	/*****************************************************************************/	385	/*****************************************************************************/
145		386
146	typedef struct	387	void inline_size
147	{
148	struct ev_io *head;
149	unsigned char events;
150	unsigned char reify;
151	} ANFD;
152
153	static ANFD *anfds;
154	static int anfdmax;
155
156	static void
157	anfds_init (ANFD *base, int count)	388	anfds_init (ANFD *base, int count)
158	{	389	{
159	while (count--)	390	while (count--)
160	{	391	{
161	base->head = 0;	392	base->head = 0;
…		…
164		395
165	++base;	396	++base;
166	}	397	}
167	}	398	}
168		399
169	typedef struct	400	void noinline
		401	ev_feed_event (EV_P_ void *w, int revents)
170	{	402	{
171	W w;	403	W w_ = (W)w;
172	int events;
173	} ANPENDING;
174		404
175	static ANPENDING *pendings;	405	if (expect_false (w_->pending))
176	static int pendingmax, pendingcnt;	406	{
		407	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		408	return;
		409	}
		410
		411	w_->pending = ++pendingcnt [ABSPRI (w_)];
		412	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		413	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		414	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		415	}
177		416
178	static void	417	static void
179	event (W w, int events)
180	{
181	if (w->pending)
182	{
183	pendings [w->pending - 1].events |= events;
184	return;
185	}
186
187	w->pending = ++pendingcnt;
188	array_needsize (pendings, pendingmax, pendingcnt, );
189	pendings [pendingcnt - 1].w = w;
190	pendings [pendingcnt - 1].events = events;
191	}
192
193	static void
194	queue_events (W *events, int eventcnt, int type)	418	queue_events (EV_P_ W *events, int eventcnt, int type)
195	{	419	{
196	int i;	420	int i;
197		421
198	for (i = 0; i < eventcnt; ++i)	422	for (i = 0; i < eventcnt; ++i)
199	event (events [i], type);	423	ev_feed_event (EV_A_ events [i], type);
200	}	424	}
201		425
202	static void	426	void inline_speed
203	fd_event (int fd, int events)	427	fd_event (EV_P_ int fd, int revents)
204	{	428	{
205	ANFD *anfd = anfds + fd;	429	ANFD *anfd = anfds + fd;
206	struct ev_io *w;	430	ev_io *w;
207		431
208	for (w = anfd->head; w; w = w->next)	432	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
209	{	433	{
210	int ev = w->events & events;	434	int ev = w->events & revents;
211		435
212	if (ev)	436	if (ev)
213	event ((W)w, ev);	437	ev_feed_event (EV_A_ (W)w, ev);
214	}	438	}
		439	}
		440
		441	void
		442	ev_feed_fd_event (EV_P_ int fd, int revents)
		443	{
		444	fd_event (EV_A_ fd, revents);
215	}	445	}
216		446
217	/*****************************************************************************/	447	/*****************************************************************************/
218		448
219	static int *fdchanges;	449	void inline_size
220	static int fdchangemax, fdchangecnt;	450	fd_reify (EV_P)
221
222	static void
223	fd_reify (void)
224	{	451	{
225	int i;	452	int i;
226		453
227	for (i = 0; i < fdchangecnt; ++i)	454	for (i = 0; i < fdchangecnt; ++i)
228	{	455	{
229	int fd = fdchanges [i];	456	int fd = fdchanges [i];
230	ANFD *anfd = anfds + fd;	457	ANFD *anfd = anfds + fd;
231	struct ev_io *w;	458	ev_io *w;
232		459
233	int events = 0;	460	int events = 0;
234		461
235	for (w = anfd->head; w; w = w->next)	462	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
236	events |= w->events;	463	events |= w->events;
237		464
		465	#if EV_SELECT_IS_WINSOCKET
		466	if (events)
		467	{
		468	unsigned long argp;
		469	anfd->handle = _get_osfhandle (fd);
		470	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		471	}
		472	#endif
		473
238	anfd->reify = 0;	474	anfd->reify = 0;
239		475
240	if (anfd->events != events)
241	{
242	method_modify (fd, anfd->events, events);	476	backend_modify (EV_A_ fd, anfd->events, events);
243	anfd->events = events;	477	anfd->events = events;
244	}
245	}	478	}
246		479
247	fdchangecnt = 0;	480	fdchangecnt = 0;
248	}	481	}
249		482
250	static void	483	void inline_size
251	fd_change (int fd)	484	fd_change (EV_P_ int fd)
252	{	485	{
253	if (anfds [fd].reify || fdchangecnt < 0)	486	if (expect_false (anfds [fd].reify))
254	return;	487	return;
255		488
256	anfds [fd].reify = 1;	489	anfds [fd].reify = 1;
257		490
258	++fdchangecnt;	491	++fdchangecnt;
259	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	492	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
260	fdchanges [fdchangecnt - 1] = fd;	493	fdchanges [fdchangecnt - 1] = fd;
261	}	494	}
262		495
		496	void inline_speed
		497	fd_kill (EV_P_ int fd)
		498	{
		499	ev_io *w;
		500
		501	while ((w = (ev_io *)anfds [fd].head))
		502	{
		503	ev_io_stop (EV_A_ w);
		504	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		505	}
		506	}
		507
		508	int inline_size
		509	fd_valid (int fd)
		510	{
		511	#ifdef _WIN32
		512	return _get_osfhandle (fd) != -1;
		513	#else
		514	return fcntl (fd, F_GETFD) != -1;
		515	#endif
		516	}
		517
263	/* called on EBADF to verify fds */	518	/* called on EBADF to verify fds */
264	static void	519	static void noinline
265	fd_recheck (void)	520	fd_ebadf (EV_P)
266	{	521	{
267	int fd;	522	int fd;
268		523
269	for (fd = 0; fd < anfdmax; ++fd)	524	for (fd = 0; fd < anfdmax; ++fd)
270	if (anfds [fd].events)	525	if (anfds [fd].events)
271	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	526	if (!fd_valid (fd) == -1 && errno == EBADF)
272	while (anfds [fd].head)	527	fd_kill (EV_A_ fd);
		528	}
		529
		530	/* called on ENOMEM in select/poll to kill some fds and retry */
		531	static void noinline
		532	fd_enomem (EV_P)
		533	{
		534	int fd;
		535
		536	for (fd = anfdmax; fd--; )
		537	if (anfds [fd].events)
273	{	538	{
274	ev_io_stop (anfds [fd].head);	539	fd_kill (EV_A_ fd);
275	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	540	return;
276	}	541	}
		542	}
		543
		544	/* usually called after fork if backend needs to re-arm all fds from scratch */
		545	static void noinline
		546	fd_rearm_all (EV_P)
		547	{
		548	int fd;
		549
		550	/* this should be highly optimised to not do anything but set a flag */
		551	for (fd = 0; fd < anfdmax; ++fd)
		552	if (anfds [fd].events)
		553	{
		554	anfds [fd].events = 0;
		555	fd_change (EV_A_ fd);
		556	}
277	}	557	}
278		558
279	/*****************************************************************************/	559	/*****************************************************************************/
280		560
281	static struct ev_timer **timers;	561	void inline_speed
282	static int timermax, timercnt;
283
284	static struct ev_periodic **periodics;
285	static int periodicmax, periodiccnt;
286
287	static void
288	upheap (WT *timers, int k)	562	upheap (WT *heap, int k)
289	{	563	{
290	WT w = timers [k];	564	WT w = heap [k];
291		565
292	while (k && timers [k >> 1]->at > w->at)	566	while (k && heap [k >> 1]->at > w->at)
293	{	567	{
294	timers [k] = timers [k >> 1];	568	heap [k] = heap [k >> 1];
295	timers [k]->active = k + 1;	569	((W)heap [k])->active = k + 1;
296	k >>= 1;	570	k >>= 1;
297	}	571	}
298		572
299	timers [k] = w;	573	heap [k] = w;
300	timers [k]->active = k + 1;	574	((W)heap [k])->active = k + 1;
301		575
302	}	576	}
303		577
304	static void	578	void inline_speed
305	downheap (WT *timers, int N, int k)	579	downheap (WT *heap, int N, int k)
306	{	580	{
307	WT w = timers [k];	581	WT w = heap [k];
308		582
309	while (k < (N >> 1))	583	while (k < (N >> 1))
310	{	584	{
311	int j = k << 1;	585	int j = k << 1;
312		586
313	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	587	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
314	++j;	588	++j;
315		589
316	if (w->at <= timers [j]->at)	590	if (w->at <= heap [j]->at)
317	break;	591	break;
318		592
319	timers [k] = timers [j];	593	heap [k] = heap [j];
320	timers [k]->active = k + 1;	594	((W)heap [k])->active = k + 1;
321	k = j;	595	k = j;
322	}	596	}
323		597
324	timers [k] = w;	598	heap [k] = w;
325	timers [k]->active = k + 1;	599	((W)heap [k])->active = k + 1;
		600	}
		601
		602	void inline_size
		603	adjustheap (WT *heap, int N, int k)
		604	{
		605	upheap (heap, k);
		606	downheap (heap, N, k);
326	}	607	}
327		608
328	/*****************************************************************************/	609	/*****************************************************************************/
329		610
330	typedef struct	611	typedef struct
331	{	612	{
332	struct ev_signal *head;	613	WL head;
333	sig_atomic_t volatile gotsig;	614	sig_atomic_t volatile gotsig;
334	} ANSIG;	615	} ANSIG;
335		616
336	static ANSIG *signals;	617	static ANSIG *signals;
337	static int signalmax;	618	static int signalmax;
338		619
339	static int sigpipe [2];	620	static int sigpipe [2];
340	static sig_atomic_t volatile gotsig;	621	static sig_atomic_t volatile gotsig;
341	static struct ev_io sigev;	622	static ev_io sigev;
342		623
343	static void	624	void inline_size
344	signals_init (ANSIG *base, int count)	625	signals_init (ANSIG *base, int count)
345	{	626	{
346	while (count--)	627	while (count--)
347	{	628	{
348	base->head = 0;	629	base->head = 0;
…		…
353	}	634	}
354		635
355	static void	636	static void
356	sighandler (int signum)	637	sighandler (int signum)
357	{	638	{
		639	#if _WIN32
		640	signal (signum, sighandler);
		641	#endif
		642
358	signals [signum - 1].gotsig = 1;	643	signals [signum - 1].gotsig = 1;
359		644
360	if (!gotsig)	645	if (!gotsig)
361	{	646	{
		647	int old_errno = errno;
362	gotsig = 1;	648	gotsig = 1;
363	write (sigpipe [1], &signum, 1);	649	write (sigpipe [1], &signum, 1);
		650	errno = old_errno;
364	}	651	}
		652	}
		653
		654	void noinline
		655	ev_feed_signal_event (EV_P_ int signum)
		656	{
		657	WL w;
		658
		659	#if EV_MULTIPLICITY
		660	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		661	#endif
		662
		663	--signum;
		664
		665	if (signum < 0 || signum >= signalmax)
		666	return;
		667
		668	signals [signum].gotsig = 0;
		669
		670	for (w = signals [signum].head; w; w = w->next)
		671	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
365	}	672	}
366		673
367	static void	674	static void
368	sigcb (struct ev_io *iow, int revents)	675	sigcb (EV_P_ ev_io *iow, int revents)
369	{	676	{
370	struct ev_signal *w;
371	int signum;	677	int signum;
372		678
373	read (sigpipe [0], &revents, 1);	679	read (sigpipe [0], &revents, 1);
374	gotsig = 0;	680	gotsig = 0;
375		681
376	for (signum = signalmax; signum--; )	682	for (signum = signalmax; signum--; )
377	if (signals [signum].gotsig)	683	if (signals [signum].gotsig)
378	{	684	ev_feed_signal_event (EV_A_ signum + 1);
379	signals [signum].gotsig = 0;
380
381	for (w = signals [signum].head; w; w = w->next)
382	event ((W)w, EV_SIGNAL);
383	}
384	}	685	}
385		686
386	static void	687	void inline_size
387	siginit (void)	688	fd_intern (int fd)
388	{	689	{
		690	#ifdef _WIN32
		691	int arg = 1;
		692	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		693	#else
389	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	694	fcntl (fd, F_SETFD, FD_CLOEXEC);
390	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
391
392	/* rather than sort out wether we really need nb, set it */
393	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	695	fcntl (fd, F_SETFL, O_NONBLOCK);
394	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	696	#endif
		697	}
		698
		699	static void noinline
		700	siginit (EV_P)
		701	{
		702	fd_intern (sigpipe [0]);
		703	fd_intern (sigpipe [1]);
395		704
396	ev_io_set (&sigev, sigpipe [0], EV_READ);	705	ev_io_set (&sigev, sigpipe [0], EV_READ);
397	ev_io_start (&sigev);	706	ev_io_start (EV_A_ &sigev);
		707	ev_unref (EV_A); /* child watcher should not keep loop alive */
398	}	708	}
399		709
400	/*****************************************************************************/	710	/*****************************************************************************/
401		711
402	static struct ev_idle **idles;
403	static int idlemax, idlecnt;
404
405	static struct ev_prepare **prepares;
406	static int preparemax, preparecnt;
407
408	static struct ev_check **checks;
409	static int checkmax, checkcnt;
410
411	/*****************************************************************************/
412
413	static struct ev_child *childs [PID_HASHSIZE];	712	static ev_child *childs [PID_HASHSIZE];
		713
		714	#ifndef _WIN32
		715
414	static struct ev_signal childev;	716	static ev_signal childev;
415		717
416	#ifndef WCONTINUED	718	#ifndef WCONTINUED
417	# define WCONTINUED 0	719	# define WCONTINUED 0
418	#endif	720	#endif
419		721
		722	void inline_speed
		723	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		724	{
		725	ev_child *w;
		726
		727	for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		728	if (w->pid == pid || !w->pid)
		729	{
		730	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		731	w->rpid = pid;
		732	w->rstatus = status;
		733	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		734	}
		735	}
		736
420	static void	737	static void
421	childcb (struct ev_signal *sw, int revents)	738	childcb (EV_P_ ev_signal *sw, int revents)
422	{	739	{
423	struct ev_child *w;
424	int pid, status;	740	int pid, status;
425		741
426	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	742	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
427	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	743	{
428	if (w->pid == pid || w->pid == -1)	744	/* make sure we are called again until all childs have been reaped */
429	{	745	/* we need to do it this way so that the callback gets called before we continue */
430	w->status = status;	746	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
431	event ((W)w, EV_CHILD);	747
432	}	748	child_reap (EV_A_ sw, pid, pid, status);
		749	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
		750	}
433	}	751	}
		752
		753	#endif
434		754
435	/*****************************************************************************/	755	/*****************************************************************************/
436		756
		757	#if EV_USE_PORT
		758	# include "ev_port.c"
		759	#endif
		760	#if EV_USE_KQUEUE
		761	# include "ev_kqueue.c"
		762	#endif
437	#if EV_USE_EPOLL	763	#if EV_USE_EPOLL
438	# include "ev_epoll.c"	764	# include "ev_epoll.c"
439	#endif	765	#endif
		766	#if EV_USE_POLL
		767	# include "ev_poll.c"
		768	#endif
440	#if EV_USE_SELECT	769	#if EV_USE_SELECT
441	# include "ev_select.c"	770	# include "ev_select.c"
442	#endif	771	#endif
443		772
444	int	773	int
…		…
451	ev_version_minor (void)	780	ev_version_minor (void)
452	{	781	{
453	return EV_VERSION_MINOR;	782	return EV_VERSION_MINOR;
454	}	783	}
455		784
456	int ev_init (int flags)	785	/* return true if we are running with elevated privileges and should ignore env variables */
		786	int inline_size
		787	enable_secure (void)
457	{	788	{
458	if (!ev_method)	789	#ifdef _WIN32
		790	return 0;
		791	#else
		792	return getuid () != geteuid ()
		793	|| getgid () != getegid ();
		794	#endif
		795	}
		796
		797	unsigned int
		798	ev_supported_backends (void)
		799	{
		800	unsigned int flags = 0;
		801
		802	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		803	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		804	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		805	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		806	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		807
		808	return flags;
		809	}
		810
		811	unsigned int
		812	ev_recommended_backends (void)
		813	{
		814	unsigned int flags = ev_supported_backends ();
		815
		816	#ifndef __NetBSD__
		817	/* kqueue is borked on everything but netbsd apparently */
		818	/* it usually doesn't work correctly on anything but sockets and pipes */
		819	flags &= ~EVBACKEND_KQUEUE;
		820	#endif
		821	#ifdef __APPLE__
		822	// flags &= ~EVBACKEND_KQUEUE; for documentation
		823	flags &= ~EVBACKEND_POLL;
		824	#endif
		825
		826	return flags;
		827	}
		828
		829	unsigned int
		830	ev_embeddable_backends (void)
		831	{
		832	return EVBACKEND_EPOLL
		833	| EVBACKEND_KQUEUE
		834	| EVBACKEND_PORT;
		835	}
		836
		837	unsigned int
		838	ev_backend (EV_P)
		839	{
		840	return backend;
		841	}
		842
		843	static void
		844	loop_init (EV_P_ unsigned int flags)
		845	{
		846	if (!backend)
459	{	847	{
460	#if EV_USE_MONOTONIC	848	#if EV_USE_MONOTONIC
461	{	849	{
462	struct timespec ts;	850	struct timespec ts;
463	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	851	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
464	have_monotonic = 1;	852	have_monotonic = 1;
465	}	853	}
466	#endif	854	#endif
467		855
468	ev_now = ev_time ();	856	ev_rt_now = ev_time ();
469	now = get_clock ();	857	mn_now = get_clock ();
		858	now_floor = mn_now;
470	diff = ev_now - now;	859	rtmn_diff = ev_rt_now - mn_now;
471		860
472	if (pipe (sigpipe))	861	if (!(flags & EVFLAG_NOENV)
473	return 0;	862	&& !enable_secure ()
		863	&& getenv ("LIBEV_FLAGS"))
		864	flags = atoi (getenv ("LIBEV_FLAGS"));
474		865
475	ev_method = EVMETHOD_NONE;	866	if (!(flags & 0x0000ffffUL))
		867	flags |= ev_recommended_backends ();
		868
		869	backend = 0;
		870	#if EV_USE_PORT
		871	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		872	#endif
		873	#if EV_USE_KQUEUE
		874	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		875	#endif
476	#if EV_USE_EPOLL	876	#if EV_USE_EPOLL
477	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	877	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		878	#endif
		879	#if EV_USE_POLL
		880	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
478	#endif	881	#endif
479	#if EV_USE_SELECT	882	#if EV_USE_SELECT
480	if (ev_method == EVMETHOD_NONE) select_init (flags);	883	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
481	#endif	884	#endif
482		885
483	if (ev_method)	886	ev_init (&sigev, sigcb);
		887	ev_set_priority (&sigev, EV_MAXPRI);
		888	}
		889	}
		890
		891	static void
		892	loop_destroy (EV_P)
		893	{
		894	int i;
		895
		896	#if EV_USE_PORT
		897	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		898	#endif
		899	#if EV_USE_KQUEUE
		900	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		901	#endif
		902	#if EV_USE_EPOLL
		903	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		904	#endif
		905	#if EV_USE_POLL
		906	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		907	#endif
		908	#if EV_USE_SELECT
		909	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		910	#endif
		911
		912	for (i = NUMPRI; i--; )
		913	array_free (pending, [i]);
		914
		915	/* have to use the microsoft-never-gets-it-right macro */
		916	array_free (fdchange, EMPTY0);
		917	array_free (timer, EMPTY0);
		918	#if EV_PERIODIC_ENABLE
		919	array_free (periodic, EMPTY0);
		920	#endif
		921	array_free (idle, EMPTY0);
		922	array_free (prepare, EMPTY0);
		923	array_free (check, EMPTY0);
		924
		925	backend = 0;
		926	}
		927
		928	static void
		929	loop_fork (EV_P)
		930	{
		931	#if EV_USE_PORT
		932	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		933	#endif
		934	#if EV_USE_KQUEUE
		935	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		936	#endif
		937	#if EV_USE_EPOLL
		938	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		939	#endif
		940
		941	if (ev_is_active (&sigev))
		942	{
		943	/* default loop */
		944
		945	ev_ref (EV_A);
		946	ev_io_stop (EV_A_ &sigev);
		947	close (sigpipe [0]);
		948	close (sigpipe [1]);
		949
		950	while (pipe (sigpipe))
		951	syserr ("(libev) error creating pipe");
		952
		953	siginit (EV_A);
		954	}
		955
		956	postfork = 0;
		957	}
		958
		959	#if EV_MULTIPLICITY
		960	struct ev_loop *
		961	ev_loop_new (unsigned int flags)
		962	{
		963	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		964
		965	memset (loop, 0, sizeof (struct ev_loop));
		966
		967	loop_init (EV_A_ flags);
		968
		969	if (ev_backend (EV_A))
		970	return loop;
		971
		972	return 0;
		973	}
		974
		975	void
		976	ev_loop_destroy (EV_P)
		977	{
		978	loop_destroy (EV_A);
		979	ev_free (loop);
		980	}
		981
		982	void
		983	ev_loop_fork (EV_P)
		984	{
		985	postfork = 1;
		986	}
		987
		988	#endif
		989
		990	#if EV_MULTIPLICITY
		991	struct ev_loop *
		992	ev_default_loop_init (unsigned int flags)
		993	#else
		994	int
		995	ev_default_loop (unsigned int flags)
		996	#endif
		997	{
		998	if (sigpipe [0] == sigpipe [1])
		999	if (pipe (sigpipe))
		1000	return 0;
		1001
		1002	if (!ev_default_loop_ptr)
		1003	{
		1004	#if EV_MULTIPLICITY
		1005	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1006	#else
		1007	ev_default_loop_ptr = 1;
		1008	#endif
		1009
		1010	loop_init (EV_A_ flags);
		1011
		1012	if (ev_backend (EV_A))
484	{	1013	{
485	ev_watcher_init (&sigev, sigcb);
486	siginit ();	1014	siginit (EV_A);
487		1015
		1016	#ifndef _WIN32
488	ev_signal_init (&childev, childcb, SIGCHLD);	1017	ev_signal_init (&childev, childcb, SIGCHLD);
		1018	ev_set_priority (&childev, EV_MAXPRI);
489	ev_signal_start (&childev);	1019	ev_signal_start (EV_A_ &childev);
		1020	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1021	#endif
490	}	1022	}
		1023	else
		1024	ev_default_loop_ptr = 0;
491	}	1025	}
492		1026
493	return ev_method;	1027	return ev_default_loop_ptr;
		1028	}
		1029
		1030	void
		1031	ev_default_destroy (void)
		1032	{
		1033	#if EV_MULTIPLICITY
		1034	struct ev_loop *loop = ev_default_loop_ptr;
		1035	#endif
		1036
		1037	#ifndef _WIN32
		1038	ev_ref (EV_A); /* child watcher */
		1039	ev_signal_stop (EV_A_ &childev);
		1040	#endif
		1041
		1042	ev_ref (EV_A); /* signal watcher */
		1043	ev_io_stop (EV_A_ &sigev);
		1044
		1045	close (sigpipe [0]); sigpipe [0] = 0;
		1046	close (sigpipe [1]); sigpipe [1] = 0;
		1047
		1048	loop_destroy (EV_A);
		1049	}
		1050
		1051	void
		1052	ev_default_fork (void)
		1053	{
		1054	#if EV_MULTIPLICITY
		1055	struct ev_loop *loop = ev_default_loop_ptr;
		1056	#endif
		1057
		1058	if (backend)
		1059	postfork = 1;
494	}	1060	}
495		1061
496	/*****************************************************************************/	1062	/*****************************************************************************/
497		1063
498	void	1064	int inline_size
499	ev_fork_prepare (void)	1065	any_pending (EV_P)
500	{	1066	{
501	/* nop */	1067	int pri;
502	}
503		1068
504	void	1069	for (pri = NUMPRI; pri--; )
505	ev_fork_parent (void)	1070	if (pendingcnt [pri])
506	{	1071	return 1;
507	/* nop */
508	}
509		1072
510	void	1073	return 0;
511	ev_fork_child (void)
512	{
513	#if EV_USE_EPOLL
514	if (ev_method == EVMETHOD_EPOLL)
515	epoll_postfork_child ();
516	#endif
517
518	ev_io_stop (&sigev);
519	close (sigpipe [0]);
520	close (sigpipe [1]);
521	pipe (sigpipe);
522	siginit ();
523	}	1074	}
524		1075
525	/*****************************************************************************/	1076	void inline_speed
526
527	static void
528	call_pending (void)	1077	call_pending (EV_P)
529	{	1078	{
		1079	int pri;
		1080
		1081	for (pri = NUMPRI; pri--; )
530	while (pendingcnt)	1082	while (pendingcnt [pri])
531	{	1083	{
532	ANPENDING *p = pendings + --pendingcnt;	1084	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
533		1085
534	if (p->w)	1086	if (expect_true (p->w))
535	{	1087	{
		1088	assert (("non-pending watcher on pending list", p->w->pending));
		1089
536	p->w->pending = 0;	1090	p->w->pending = 0;
537	p->w->cb (p->w, p->events);	1091	EV_CB_INVOKE (p->w, p->events);
538	}	1092	}
539	}	1093	}
540	}	1094	}
541		1095
542	static void	1096	void inline_size
543	timers_reify (void)	1097	timers_reify (EV_P)
544	{	1098	{
545	while (timercnt && timers [0]->at <= now)	1099	while (timercnt && ((WT)timers [0])->at <= mn_now)
546	{	1100	{
547	struct ev_timer *w = timers [0];	1101	ev_timer *w = timers [0];
		1102
		1103	assert (("inactive timer on timer heap detected", ev_is_active (w)));
548		1104
549	/* first reschedule or stop timer */	1105	/* first reschedule or stop timer */
550	if (w->repeat)	1106	if (w->repeat)
551	{	1107	{
552	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1108	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1109
553	w->at = now + w->repeat;	1110	((WT)w)->at += w->repeat;
		1111	if (((WT)w)->at < mn_now)
		1112	((WT)w)->at = mn_now;
		1113
554	downheap ((WT *)timers, timercnt, 0);	1114	downheap ((WT *)timers, timercnt, 0);
555	}	1115	}
556	else	1116	else
557	ev_timer_stop (w); /* nonrepeating: stop timer */	1117	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
558		1118
559	event ((W)w, EV_TIMEOUT);	1119	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
560	}	1120	}
561	}	1121	}
562		1122
563	static void	1123	#if EV_PERIODIC_ENABLE
		1124	void inline_size
564	periodics_reify (void)	1125	periodics_reify (EV_P)
565	{	1126	{
566	while (periodiccnt && periodics [0]->at <= ev_now)	1127	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
567	{	1128	{
568	struct ev_periodic *w = periodics [0];	1129	ev_periodic *w = periodics [0];
		1130
		1131	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
569		1132
570	/* first reschedule or stop timer */	1133	/* first reschedule or stop timer */
571	if (w->interval)	1134	if (w->reschedule_cb)
572	{	1135	{
		1136	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1137	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1138	downheap ((WT *)periodics, periodiccnt, 0);
		1139	}
		1140	else if (w->interval)
		1141	{
573	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1142	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
574	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	1143	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
575	downheap ((WT *)periodics, periodiccnt, 0);	1144	downheap ((WT *)periodics, periodiccnt, 0);
576	}	1145	}
577	else	1146	else
578	ev_periodic_stop (w); /* nonrepeating: stop timer */	1147	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
579		1148
580	event ((W)w, EV_PERIODIC);	1149	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
581	}	1150	}
582	}	1151	}
583		1152
584	static void	1153	static void noinline
585	periodics_reschedule (ev_tstamp diff)	1154	periodics_reschedule (EV_P)
586	{	1155	{
587	int i;	1156	int i;
588		1157
589	/* adjust periodics after time jump */	1158	/* adjust periodics after time jump */
590	for (i = 0; i < periodiccnt; ++i)	1159	for (i = 0; i < periodiccnt; ++i)
591	{	1160	{
592	struct ev_periodic *w = periodics [i];	1161	ev_periodic *w = periodics [i];
593		1162
		1163	if (w->reschedule_cb)
		1164	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
594	if (w->interval)	1165	else if (w->interval)
		1166	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1167	}
		1168
		1169	/* now rebuild the heap */
		1170	for (i = periodiccnt >> 1; i--; )
		1171	downheap ((WT *)periodics, periodiccnt, i);
		1172	}
		1173	#endif
		1174
		1175	int inline_size
		1176	time_update_monotonic (EV_P)
		1177	{
		1178	mn_now = get_clock ();
		1179
		1180	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1181	{
		1182	ev_rt_now = rtmn_diff + mn_now;
		1183	return 0;
		1184	}
		1185	else
		1186	{
		1187	now_floor = mn_now;
		1188	ev_rt_now = ev_time ();
		1189	return 1;
		1190	}
		1191	}
		1192
		1193	void inline_size
		1194	time_update (EV_P)
		1195	{
		1196	int i;
		1197
		1198	#if EV_USE_MONOTONIC
		1199	if (expect_true (have_monotonic))
		1200	{
		1201	if (time_update_monotonic (EV_A))
595	{	1202	{
596	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1203	ev_tstamp odiff = rtmn_diff;
597		1204
598	if (fabs (diff) >= 1e-4)	1205	/* loop a few times, before making important decisions.
		1206	* on the choice of "4": one iteration isn't enough,
		1207	* in case we get preempted during the calls to
		1208	* ev_time and get_clock. a second call is almost guarenteed
		1209	* to succeed in that case, though. and looping a few more times
		1210	* doesn't hurt either as we only do this on time-jumps or
		1211	* in the unlikely event of getting preempted here.
		1212	*/
		1213	for (i = 4; --i; )
599	{	1214	{
600	ev_periodic_stop (w);	1215	rtmn_diff = ev_rt_now - mn_now;
601	ev_periodic_start (w);
602		1216
603	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1217	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1218	return; /* all is well */
		1219
		1220	ev_rt_now = ev_time ();
		1221	mn_now = get_clock ();
		1222	now_floor = mn_now;
604	}	1223	}
		1224
		1225	# if EV_PERIODIC_ENABLE
		1226	periodics_reschedule (EV_A);
		1227	# endif
		1228	/* no timer adjustment, as the monotonic clock doesn't jump */
		1229	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
605	}	1230	}
606	}	1231	}
607	}	1232	else
608		1233	#endif
609	static void	1234	{
610	time_update (void)
611	{
612	int i;
613
614	ev_now = ev_time ();	1235	ev_rt_now = ev_time ();
615		1236
616	if (have_monotonic)	1237	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
617	{
618	ev_tstamp odiff = diff;
619
620	for (i = 4; --i; ) /* loop a few times, before making important decisions */
621	{	1238	{
622	now = get_clock ();	1239	#if EV_PERIODIC_ENABLE
623	diff = ev_now - now;
624
625	if (fabs (odiff - diff) < MIN_TIMEJUMP)
626	return; /* all is well */
627
628	ev_now = ev_time ();
629	}
630
631	periodics_reschedule (diff - odiff);
632	/* no timer adjustment, as the monotonic clock doesn't jump */
633	}
634	else
635	{
636	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
637	{
638	periodics_reschedule (ev_now - now);	1240	periodics_reschedule (EV_A);
		1241	#endif
639		1242
640	/* adjust timers. this is easy, as the offset is the same for all */	1243	/* adjust timers. this is easy, as the offset is the same for all */
641	for (i = 0; i < timercnt; ++i)	1244	for (i = 0; i < timercnt; ++i)
642	timers [i]->at += diff;	1245	((WT)timers [i])->at += ev_rt_now - mn_now;
643	}	1246	}
644		1247
645	now = ev_now;	1248	mn_now = ev_rt_now;
646	}	1249	}
647	}	1250	}
648		1251
649	int ev_loop_done;	1252	void
		1253	ev_ref (EV_P)
		1254	{
		1255	++activecnt;
		1256	}
650		1257
		1258	void
		1259	ev_unref (EV_P)
		1260	{
		1261	--activecnt;
		1262	}
		1263
		1264	static int loop_done;
		1265
		1266	void
651	void ev_loop (int flags)	1267	ev_loop (EV_P_ int flags)
652	{	1268	{
653	double block;
654	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1269	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1270	? EVUNLOOP_ONE
		1271	: EVUNLOOP_CANCEL;
655		1272
656	do	1273	while (activecnt)
657	{	1274	{
658	/* queue check watchers (and execute them) */	1275	/* queue check watchers (and execute them) */
659	if (preparecnt)	1276	if (expect_false (preparecnt))
660	{	1277	{
661	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1278	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
662	call_pending ();	1279	call_pending (EV_A);
663	}	1280	}
664		1281
		1282	/* we might have forked, so reify kernel state if necessary */
		1283	if (expect_false (postfork))
		1284	loop_fork (EV_A);
		1285
665	/* update fd-related kernel structures */	1286	/* update fd-related kernel structures */
666	fd_reify ();	1287	fd_reify (EV_A);
667		1288
668	/* calculate blocking time */	1289	/* calculate blocking time */
		1290	{
		1291	double block;
669		1292
670	/* we only need this for !monotonic clockor timers, but as we basically
671	always have timers, we just calculate it always */
672	ev_now = ev_time ();
673
674	if (flags & EVLOOP_NONBLOCK || idlecnt)	1293	if (flags & EVLOOP_NONBLOCK || idlecnt)
675	block = 0.;	1294	block = 0.; /* do not block at all */
676	else	1295	else
677	{	1296	{
		1297	/* update time to cancel out callback processing overhead */
		1298	#if EV_USE_MONOTONIC
		1299	if (expect_true (have_monotonic))
		1300	time_update_monotonic (EV_A);
		1301	else
		1302	#endif
		1303	{
		1304	ev_rt_now = ev_time ();
		1305	mn_now = ev_rt_now;
		1306	}
		1307
678	block = MAX_BLOCKTIME;	1308	block = MAX_BLOCKTIME;
679		1309
680	if (timercnt)	1310	if (timercnt)
681	{	1311	{
682	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1312	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
683	if (block > to) block = to;	1313	if (block > to) block = to;
684	}	1314	}
685		1315
		1316	#if EV_PERIODIC_ENABLE
686	if (periodiccnt)	1317	if (periodiccnt)
687	{	1318	{
688	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1319	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
689	if (block > to) block = to;	1320	if (block > to) block = to;
690	}	1321	}
		1322	#endif
691		1323
692	if (block < 0.) block = 0.;	1324	if (expect_false (block < 0.)) block = 0.;
693	}	1325	}
694		1326
695	method_poll (block);	1327	backend_poll (EV_A_ block);
		1328	}
696		1329
697	/* update ev_now, do magic */	1330	/* update ev_rt_now, do magic */
698	time_update ();	1331	time_update (EV_A);
699		1332
700	/* queue pending timers and reschedule them */	1333	/* queue pending timers and reschedule them */
701	timers_reify (); /* relative timers called last */	1334	timers_reify (EV_A); /* relative timers called last */
		1335	#if EV_PERIODIC_ENABLE
702	periodics_reify (); /* absolute timers called first */	1336	periodics_reify (EV_A); /* absolute timers called first */
		1337	#endif
703		1338
704	/* queue idle watchers unless io or timers are pending */	1339	/* queue idle watchers unless other events are pending */
705	if (!pendingcnt)	1340	if (idlecnt && !any_pending (EV_A))
706	queue_events ((W *)idles, idlecnt, EV_IDLE);	1341	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
707		1342
708	/* queue check watchers, to be executed first */	1343	/* queue check watchers, to be executed first */
709	if (checkcnt)	1344	if (expect_false (checkcnt))
710	queue_events ((W *)checks, checkcnt, EV_CHECK);	1345	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
711		1346
712	call_pending ();	1347	call_pending (EV_A);
713	}
714	while (!ev_loop_done);
715		1348
716	if (ev_loop_done != 2)	1349	if (expect_false (loop_done))
		1350	break;
		1351	}
		1352
		1353	if (loop_done == EVUNLOOP_ONE)
		1354	loop_done = EVUNLOOP_CANCEL;
		1355	}
		1356
		1357	void
		1358	ev_unloop (EV_P_ int how)
		1359	{
717	ev_loop_done = 0;	1360	loop_done = how;
718	}	1361	}
719		1362
720	/*****************************************************************************/	1363	/*****************************************************************************/
721		1364
722	static void	1365	void inline_size
723	wlist_add (WL *head, WL elem)	1366	wlist_add (WL *head, WL elem)
724	{	1367	{
725	elem->next = *head;	1368	elem->next = *head;
726	*head = elem;	1369	*head = elem;
727	}	1370	}
728		1371
729	static void	1372	void inline_size
730	wlist_del (WL *head, WL elem)	1373	wlist_del (WL *head, WL elem)
731	{	1374	{
732	while (*head)	1375	while (*head)
733	{	1376	{
734	if (*head == elem)	1377	if (*head == elem)
…		…
739		1382
740	head = &(*head)->next;	1383	head = &(*head)->next;
741	}	1384	}
742	}	1385	}
743		1386
744	static void	1387	void inline_speed
745	ev_clear_pending (W w)	1388	ev_clear_pending (EV_P_ W w)
746	{	1389	{
747	if (w->pending)	1390	if (w->pending)
748	{	1391	{
749	pendings [w->pending - 1].w = 0;	1392	pendings [ABSPRI (w)][w->pending - 1].w = 0;
750	w->pending = 0;	1393	w->pending = 0;
751	}	1394	}
752	}	1395	}
753		1396
754	static void	1397	void inline_speed
755	ev_start (W w, int active)	1398	ev_start (EV_P_ W w, int active)
756	{	1399	{
		1400	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1401	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1402
757	w->active = active;	1403	w->active = active;
		1404	ev_ref (EV_A);
758	}	1405	}
759		1406
760	static void	1407	void inline_size
761	ev_stop (W w)	1408	ev_stop (EV_P_ W w)
762	{	1409	{
		1410	ev_unref (EV_A);
763	w->active = 0;	1411	w->active = 0;
764	}	1412	}
765		1413
766	/*****************************************************************************/	1414	/*****************************************************************************/
767		1415
768	void	1416	void
769	ev_io_start (struct ev_io *w)	1417	ev_io_start (EV_P_ ev_io *w)
770	{	1418	{
771	int fd = w->fd;	1419	int fd = w->fd;
772		1420
773	if (ev_is_active (w))	1421	if (expect_false (ev_is_active (w)))
774	return;	1422	return;
775		1423
776	assert (("ev_io_start called with negative fd", fd >= 0));	1424	assert (("ev_io_start called with negative fd", fd >= 0));
777		1425
778	ev_start ((W)w, 1);	1426	ev_start (EV_A_ (W)w, 1);
779	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1427	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
780	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1428	wlist_add ((WL *)&anfds[fd].head, (WL)w);
781		1429
782	fd_change (fd);	1430	fd_change (EV_A_ fd);
783	}	1431	}
784		1432
785	void	1433	void
786	ev_io_stop (struct ev_io *w)	1434	ev_io_stop (EV_P_ ev_io *w)
787	{	1435	{
788	ev_clear_pending ((W)w);	1436	ev_clear_pending (EV_A_ (W)w);
789	if (!ev_is_active (w))	1437	if (expect_false (!ev_is_active (w)))
790	return;	1438	return;
		1439
		1440	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
791		1441
792	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1442	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
793	ev_stop ((W)w);	1443	ev_stop (EV_A_ (W)w);
794		1444
795	fd_change (w->fd);	1445	fd_change (EV_A_ w->fd);
796	}	1446	}
797		1447
798	void	1448	void
799	ev_timer_start (struct ev_timer *w)	1449	ev_timer_start (EV_P_ ev_timer *w)
800	{	1450	{
801	if (ev_is_active (w))	1451	if (expect_false (ev_is_active (w)))
802	return;	1452	return;
803		1453
804	w->at += now;	1454	((WT)w)->at += mn_now;
805		1455
806	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1456	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
807		1457
808	ev_start ((W)w, ++timercnt);	1458	ev_start (EV_A_ (W)w, ++timercnt);
809	array_needsize (timers, timermax, timercnt, );	1459	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
810	timers [timercnt - 1] = w;	1460	timers [timercnt - 1] = w;
811	upheap ((WT *)timers, timercnt - 1);	1461	upheap ((WT *)timers, timercnt - 1);
812	}
813		1462
		1463	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1464	}
		1465
814	void	1466	void
815	ev_timer_stop (struct ev_timer *w)	1467	ev_timer_stop (EV_P_ ev_timer *w)
816	{	1468	{
817	ev_clear_pending ((W)w);	1469	ev_clear_pending (EV_A_ (W)w);
818	if (!ev_is_active (w))	1470	if (expect_false (!ev_is_active (w)))
819	return;	1471	return;
820		1472
		1473	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1474
821	if (w->active < timercnt--)	1475	if (expect_true (((W)w)->active < timercnt--))
822	{	1476	{
823	timers [w->active - 1] = timers [timercnt];	1477	timers [((W)w)->active - 1] = timers [timercnt];
824	downheap ((WT *)timers, timercnt, w->active - 1);	1478	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
825	}	1479	}
826		1480
827	w->at = w->repeat;	1481	((WT)w)->at -= mn_now;
828		1482
829	ev_stop ((W)w);	1483	ev_stop (EV_A_ (W)w);
830	}	1484	}
831		1485
832	void	1486	void
833	ev_timer_again (struct ev_timer *w)	1487	ev_timer_again (EV_P_ ev_timer *w)
834	{	1488	{
835	if (ev_is_active (w))	1489	if (ev_is_active (w))
836	{	1490	{
837	if (w->repeat)	1491	if (w->repeat)
838	{	1492	{
839	w->at = now + w->repeat;	1493	((WT)w)->at = mn_now + w->repeat;
840	downheap ((WT *)timers, timercnt, w->active - 1);	1494	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
841	}	1495	}
842	else	1496	else
843	ev_timer_stop (w);	1497	ev_timer_stop (EV_A_ w);
844	}	1498	}
845	else if (w->repeat)	1499	else if (w->repeat)
		1500	{
		1501	w->at = w->repeat;
846	ev_timer_start (w);	1502	ev_timer_start (EV_A_ w);
		1503	}
847	}	1504	}
848		1505
		1506	#if EV_PERIODIC_ENABLE
849	void	1507	void
850	ev_periodic_start (struct ev_periodic *w)	1508	ev_periodic_start (EV_P_ ev_periodic *w)
851	{	1509	{
852	if (ev_is_active (w))	1510	if (expect_false (ev_is_active (w)))
853	return;	1511	return;
854		1512
		1513	if (w->reschedule_cb)
		1514	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1515	else if (w->interval)
		1516	{
855	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1517	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
856
857	/* this formula differs from the one in periodic_reify because we do not always round up */	1518	/* this formula differs from the one in periodic_reify because we do not always round up */
858	if (w->interval)
859	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1519	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1520	}
860		1521
861	ev_start ((W)w, ++periodiccnt);	1522	ev_start (EV_A_ (W)w, ++periodiccnt);
862	array_needsize (periodics, periodicmax, periodiccnt, );	1523	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
863	periodics [periodiccnt - 1] = w;	1524	periodics [periodiccnt - 1] = w;
864	upheap ((WT *)periodics, periodiccnt - 1);	1525	upheap ((WT *)periodics, periodiccnt - 1);
865	}
866		1526
		1527	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1528	}
		1529
867	void	1530	void
868	ev_periodic_stop (struct ev_periodic *w)	1531	ev_periodic_stop (EV_P_ ev_periodic *w)
869	{	1532	{
870	ev_clear_pending ((W)w);	1533	ev_clear_pending (EV_A_ (W)w);
871	if (!ev_is_active (w))	1534	if (expect_false (!ev_is_active (w)))
872	return;	1535	return;
873		1536
		1537	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1538
874	if (w->active < periodiccnt--)	1539	if (expect_true (((W)w)->active < periodiccnt--))
875	{	1540	{
876	periodics [w->active - 1] = periodics [periodiccnt];	1541	periodics [((W)w)->active - 1] = periodics [periodiccnt];
877	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1542	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
878	}	1543	}
879		1544
880	ev_stop ((W)w);	1545	ev_stop (EV_A_ (W)w);
881	}	1546	}
882		1547
883	void	1548	void
		1549	ev_periodic_again (EV_P_ ev_periodic *w)
		1550	{
		1551	/* TODO: use adjustheap and recalculation */
		1552	ev_periodic_stop (EV_A_ w);
		1553	ev_periodic_start (EV_A_ w);
		1554	}
		1555	#endif
		1556
		1557	void
		1558	ev_idle_start (EV_P_ ev_idle *w)
		1559	{
		1560	if (expect_false (ev_is_active (w)))
		1561	return;
		1562
		1563	ev_start (EV_A_ (W)w, ++idlecnt);
		1564	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
		1565	idles [idlecnt - 1] = w;
		1566	}
		1567
		1568	void
		1569	ev_idle_stop (EV_P_ ev_idle *w)
		1570	{
		1571	ev_clear_pending (EV_A_ (W)w);
		1572	if (expect_false (!ev_is_active (w)))
		1573	return;
		1574
		1575	{
		1576	int active = ((W)w)->active;
		1577	idles [active - 1] = idles [--idlecnt];
		1578	((W)idles [active - 1])->active = active;
		1579	}
		1580
		1581	ev_stop (EV_A_ (W)w);
		1582	}
		1583
		1584	void
		1585	ev_prepare_start (EV_P_ ev_prepare *w)
		1586	{
		1587	if (expect_false (ev_is_active (w)))
		1588	return;
		1589
		1590	ev_start (EV_A_ (W)w, ++preparecnt);
		1591	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		1592	prepares [preparecnt - 1] = w;
		1593	}
		1594
		1595	void
		1596	ev_prepare_stop (EV_P_ ev_prepare *w)
		1597	{
		1598	ev_clear_pending (EV_A_ (W)w);
		1599	if (expect_false (!ev_is_active (w)))
		1600	return;
		1601
		1602	{
		1603	int active = ((W)w)->active;
		1604	prepares [active - 1] = prepares [--preparecnt];
		1605	((W)prepares [active - 1])->active = active;
		1606	}
		1607
		1608	ev_stop (EV_A_ (W)w);
		1609	}
		1610
		1611	void
		1612	ev_check_start (EV_P_ ev_check *w)
		1613	{
		1614	if (expect_false (ev_is_active (w)))
		1615	return;
		1616
		1617	ev_start (EV_A_ (W)w, ++checkcnt);
		1618	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		1619	checks [checkcnt - 1] = w;
		1620	}
		1621
		1622	void
		1623	ev_check_stop (EV_P_ ev_check *w)
		1624	{
		1625	ev_clear_pending (EV_A_ (W)w);
		1626	if (expect_false (!ev_is_active (w)))
		1627	return;
		1628
		1629	{
		1630	int active = ((W)w)->active;
		1631	checks [active - 1] = checks [--checkcnt];
		1632	((W)checks [active - 1])->active = active;
		1633	}
		1634
		1635	ev_stop (EV_A_ (W)w);
		1636	}
		1637
		1638	#ifndef SA_RESTART
		1639	# define SA_RESTART 0
		1640	#endif
		1641
		1642	void
884	ev_signal_start (struct ev_signal *w)	1643	ev_signal_start (EV_P_ ev_signal *w)
885	{	1644	{
		1645	#if EV_MULTIPLICITY
		1646	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1647	#endif
886	if (ev_is_active (w))	1648	if (expect_false (ev_is_active (w)))
887	return;	1649	return;
888		1650
889	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1651	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
890		1652
891	ev_start ((W)w, 1);	1653	ev_start (EV_A_ (W)w, 1);
892	array_needsize (signals, signalmax, w->signum, signals_init);	1654	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
893	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1655	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
894		1656
895	if (!w->next)	1657	if (!((WL)w)->next)
896	{	1658	{
		1659	#if _WIN32
		1660	signal (w->signum, sighandler);
		1661	#else
897	struct sigaction sa;	1662	struct sigaction sa;
898	sa.sa_handler = sighandler;	1663	sa.sa_handler = sighandler;
899	sigfillset (&sa.sa_mask);	1664	sigfillset (&sa.sa_mask);
900	sa.sa_flags = 0;	1665	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
901	sigaction (w->signum, &sa, 0);	1666	sigaction (w->signum, &sa, 0);
		1667	#endif
902	}	1668	}
903	}	1669	}
904		1670
905	void	1671	void
906	ev_signal_stop (struct ev_signal *w)	1672	ev_signal_stop (EV_P_ ev_signal *w)
907	{	1673	{
908	ev_clear_pending ((W)w);	1674	ev_clear_pending (EV_A_ (W)w);
909	if (!ev_is_active (w))	1675	if (expect_false (!ev_is_active (w)))
910	return;	1676	return;
911		1677
912	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1678	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
913	ev_stop ((W)w);	1679	ev_stop (EV_A_ (W)w);
914		1680
915	if (!signals [w->signum - 1].head)	1681	if (!signals [w->signum - 1].head)
916	signal (w->signum, SIG_DFL);	1682	signal (w->signum, SIG_DFL);
917	}	1683	}
918		1684
919	void	1685	void
920	ev_idle_start (struct ev_idle *w)
921	{
922	if (ev_is_active (w))
923	return;
924
925	ev_start ((W)w, ++idlecnt);
926	array_needsize (idles, idlemax, idlecnt, );
927	idles [idlecnt - 1] = w;
928	}
929
930	void
931	ev_idle_stop (struct ev_idle *w)
932	{
933	ev_clear_pending ((W)w);
934	if (ev_is_active (w))
935	return;
936
937	idles [w->active - 1] = idles [--idlecnt];
938	ev_stop ((W)w);
939	}
940
941	void
942	ev_prepare_start (struct ev_prepare *w)
943	{
944	if (ev_is_active (w))
945	return;
946
947	ev_start ((W)w, ++preparecnt);
948	array_needsize (prepares, preparemax, preparecnt, );
949	prepares [preparecnt - 1] = w;
950	}
951
952	void
953	ev_prepare_stop (struct ev_prepare *w)
954	{
955	ev_clear_pending ((W)w);
956	if (ev_is_active (w))
957	return;
958
959	prepares [w->active - 1] = prepares [--preparecnt];
960	ev_stop ((W)w);
961	}
962
963	void
964	ev_check_start (struct ev_check *w)
965	{
966	if (ev_is_active (w))
967	return;
968
969	ev_start ((W)w, ++checkcnt);
970	array_needsize (checks, checkmax, checkcnt, );
971	checks [checkcnt - 1] = w;
972	}
973
974	void
975	ev_check_stop (struct ev_check *w)
976	{
977	ev_clear_pending ((W)w);
978	if (ev_is_active (w))
979	return;
980
981	checks [w->active - 1] = checks [--checkcnt];
982	ev_stop ((W)w);
983	}
984
985	void
986	ev_child_start (struct ev_child *w)	1686	ev_child_start (EV_P_ ev_child *w)
987	{	1687	{
		1688	#if EV_MULTIPLICITY
		1689	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1690	#endif
988	if (ev_is_active (w))	1691	if (expect_false (ev_is_active (w)))
989	return;	1692	return;
990		1693
991	ev_start ((W)w, 1);	1694	ev_start (EV_A_ (W)w, 1);
992	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1695	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
993	}	1696	}
994		1697
995	void	1698	void
996	ev_child_stop (struct ev_child *w)	1699	ev_child_stop (EV_P_ ev_child *w)
997	{	1700	{
998	ev_clear_pending ((W)w);	1701	ev_clear_pending (EV_A_ (W)w);
999	if (ev_is_active (w))	1702	if (expect_false (!ev_is_active (w)))
1000	return;	1703	return;
1001		1704
1002	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1705	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1003	ev_stop ((W)w);	1706	ev_stop (EV_A_ (W)w);
1004	}	1707	}
		1708
		1709	#if EV_EMBED_ENABLE
		1710	void noinline
		1711	ev_embed_sweep (EV_P_ ev_embed *w)
		1712	{
		1713	ev_loop (w->loop, EVLOOP_NONBLOCK);
		1714	}
		1715
		1716	static void
		1717	embed_cb (EV_P_ ev_io *io, int revents)
		1718	{
		1719	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		1720
		1721	if (ev_cb (w))
		1722	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		1723	else
		1724	ev_embed_sweep (loop, w);
		1725	}
		1726
		1727	void
		1728	ev_embed_start (EV_P_ ev_embed *w)
		1729	{
		1730	if (expect_false (ev_is_active (w)))
		1731	return;
		1732
		1733	{
		1734	struct ev_loop *loop = w->loop;
		1735	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		1736	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		1737	}
		1738
		1739	ev_set_priority (&w->io, ev_priority (w));
		1740	ev_io_start (EV_A_ &w->io);
		1741
		1742	ev_start (EV_A_ (W)w, 1);
		1743	}
		1744
		1745	void
		1746	ev_embed_stop (EV_P_ ev_embed *w)
		1747	{
		1748	ev_clear_pending (EV_A_ (W)w);
		1749	if (expect_false (!ev_is_active (w)))
		1750	return;
		1751
		1752	ev_io_stop (EV_A_ &w->io);
		1753
		1754	ev_stop (EV_A_ (W)w);
		1755	}
		1756	#endif
		1757
		1758	#if EV_STAT_ENABLE
		1759
		1760	# ifdef _WIN32
		1761	# define lstat(a,b) stat(a,b)
		1762	# endif
		1763
		1764	void
		1765	ev_stat_stat (EV_P_ ev_stat *w)
		1766	{
		1767	if (lstat (w->path, &w->attr) < 0)
		1768	w->attr.st_nlink = 0;
		1769	else if (!w->attr.st_nlink)
		1770	w->attr.st_nlink = 1;
		1771	}
		1772
		1773	static void
		1774	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1775	{
		1776	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		1777
		1778	/* we copy this here each the time so that */
		1779	/* prev has the old value when the callback gets invoked */
		1780	w->prev = w->attr;
		1781	ev_stat_stat (EV_A_ w);
		1782
		1783	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
		1784	ev_feed_event (EV_A_ w, EV_STAT);
		1785	}
		1786
		1787	void
		1788	ev_stat_start (EV_P_ ev_stat *w)
		1789	{
		1790	if (expect_false (ev_is_active (w)))
		1791	return;
		1792
		1793	/* since we use memcmp, we need to clear any padding data etc. */
		1794	memset (&w->prev, 0, sizeof (ev_statdata));
		1795	memset (&w->attr, 0, sizeof (ev_statdata));
		1796
		1797	ev_stat_stat (EV_A_ w);
		1798
		1799	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		1800	ev_set_priority (&w->timer, ev_priority (w));
		1801	ev_timer_start (EV_A_ &w->timer);
		1802
		1803	ev_start (EV_A_ (W)w, 1);
		1804	}
		1805
		1806	void
		1807	ev_stat_stop (EV_P_ ev_stat *w)
		1808	{
		1809	ev_clear_pending (EV_A_ (W)w);
		1810	if (expect_false (!ev_is_active (w)))
		1811	return;
		1812
		1813	ev_timer_stop (EV_A_ &w->timer);
		1814
		1815	ev_stop (EV_A_ (W)w);
		1816	}
		1817	#endif
1005		1818
1006	/*****************************************************************************/	1819	/*****************************************************************************/
1007		1820
1008	struct ev_once	1821	struct ev_once
1009	{	1822	{
1010	struct ev_io io;	1823	ev_io io;
1011	struct ev_timer to;	1824	ev_timer to;
1012	void (*cb)(int revents, void *arg);	1825	void (*cb)(int revents, void *arg);
1013	void *arg;	1826	void *arg;
1014	};	1827	};
1015		1828
1016	static void	1829	static void
1017	once_cb (struct ev_once *once, int revents)	1830	once_cb (EV_P_ struct ev_once *once, int revents)
1018	{	1831	{
1019	void (*cb)(int revents, void *arg) = once->cb;	1832	void (*cb)(int revents, void *arg) = once->cb;
1020	void *arg = once->arg;	1833	void *arg = once->arg;
1021		1834
1022	ev_io_stop (&once->io);	1835	ev_io_stop (EV_A_ &once->io);
1023	ev_timer_stop (&once->to);	1836	ev_timer_stop (EV_A_ &once->to);
1024	free (once);	1837	ev_free (once);
1025		1838
1026	cb (revents, arg);	1839	cb (revents, arg);
1027	}	1840	}
1028		1841
1029	static void	1842	static void
1030	once_cb_io (struct ev_io *w, int revents)	1843	once_cb_io (EV_P_ ev_io *w, int revents)
1031	{	1844	{
1032	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1845	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1033	}	1846	}
1034		1847
1035	static void	1848	static void
1036	once_cb_to (struct ev_timer *w, int revents)	1849	once_cb_to (EV_P_ ev_timer *w, int revents)
1037	{	1850	{
1038	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1851	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1039	}	1852	}
1040		1853
1041	void	1854	void
1042	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1855	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1043	{	1856	{
1044	struct ev_once *once = malloc (sizeof (struct ev_once));	1857	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1045		1858
1046	if (!once)	1859	if (expect_false (!once))
		1860	{
1047	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1861	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1048	else	1862	return;
1049	{	1863	}
		1864
1050	once->cb = cb;	1865	once->cb = cb;
1051	once->arg = arg;	1866	once->arg = arg;
1052		1867
1053	ev_watcher_init (&once->io, once_cb_io);	1868	ev_init (&once->io, once_cb_io);
1054	if (fd >= 0)	1869	if (fd >= 0)
1055	{	1870	{
1056	ev_io_set (&once->io, fd, events);	1871	ev_io_set (&once->io, fd, events);
1057	ev_io_start (&once->io);	1872	ev_io_start (EV_A_ &once->io);
1058	}	1873	}
1059		1874
1060	ev_watcher_init (&once->to, once_cb_to);	1875	ev_init (&once->to, once_cb_to);
1061	if (timeout >= 0.)	1876	if (timeout >= 0.)
1062	{	1877	{
1063	ev_timer_set (&once->to, timeout, 0.);	1878	ev_timer_set (&once->to, timeout, 0.);
1064	ev_timer_start (&once->to);	1879	ev_timer_start (EV_A_ &once->to);
1065	}
1066	}
1067	}
1068
1069	/*****************************************************************************/
1070
1071	#if 0
1072
1073	struct ev_io wio;
1074
1075	static void
1076	sin_cb (struct ev_io *w, int revents)
1077	{
1078	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1079	}
1080
1081	static void
1082	ocb (struct ev_timer *w, int revents)
1083	{
1084	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1085	ev_timer_stop (w);
1086	ev_timer_start (w);
1087	}
1088
1089	static void
1090	scb (struct ev_signal *w, int revents)
1091	{
1092	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1093	ev_io_stop (&wio);
1094	ev_io_start (&wio);
1095	}
1096
1097	static void
1098	gcb (struct ev_signal *w, int revents)
1099	{
1100	fprintf (stderr, "generic %x\n", revents);
1101
1102	}
1103
1104	int main (void)
1105	{
1106	ev_init (0);
1107
1108	ev_io_init (&wio, sin_cb, 0, EV_READ);
1109	ev_io_start (&wio);
1110
1111	struct ev_timer t[10000];
1112
1113	#if 0
1114	int i;
1115	for (i = 0; i < 10000; ++i)
1116	{	1880	}
1117	struct ev_timer *w = t + i;
1118	ev_watcher_init (w, ocb, i);
1119	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1120	ev_timer_start (w);
1121	if (drand48 () < 0.5)
1122	ev_timer_stop (w);
1123	}
1124	#endif
1125
1126	struct ev_timer t1;
1127	ev_timer_init (&t1, ocb, 5, 10);
1128	ev_timer_start (&t1);
1129
1130	struct ev_signal sig;
1131	ev_signal_init (&sig, scb, SIGQUIT);
1132	ev_signal_start (&sig);
1133
1134	struct ev_check cw;
1135	ev_check_init (&cw, gcb);
1136	ev_check_start (&cw);
1137
1138	struct ev_idle iw;
1139	ev_idle_init (&iw, gcb);
1140	ev_idle_start (&iw);
1141
1142	ev_loop (0);
1143
1144	return 0;
1145	}	1881	}
1146		1882
		1883	#ifdef __cplusplus
		1884	}
1147	#endif	1885	#endif
1148		1886
1149
1150
1151

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