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Comparing libev/ev.c (file contents):
Revision 1.40 by root, Fri Nov 2 11:02:23 2007 UTC vs.
Revision 1.147 by root, Tue Nov 27 10:59:11 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
51	/**/	127	/**/
52		128
53	#ifndef EV_USE_MONOTONIC	129	#ifndef EV_USE_MONOTONIC
54	# 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
55	#endif	135	#endif
56		136
57	#ifndef EV_USE_SELECT	137	#ifndef EV_USE_SELECT
58	# define EV_USE_SELECT 1	138	# define EV_USE_SELECT 1
59	#endif	139	#endif
60		140
		141	#ifndef EV_USE_POLL
		142	# ifdef _WIN32
		143	# define EV_USE_POLL 0
		144	# else
		145	# define EV_USE_POLL 1
		146	# endif
		147	#endif
		148
61	#ifndef EV_USE_EPOLL	149	#ifndef EV_USE_EPOLL
62	# define EV_USE_EPOLL 0	150	# define EV_USE_EPOLL 0
63	#endif	151	#endif
64		152
		153	#ifndef EV_USE_KQUEUE
		154	# define EV_USE_KQUEUE 0
		155	#endif
		156
65	#ifndef EV_USE_REALTIME	157	#ifndef EV_USE_PORT
66	# define EV_USE_REALTIME 1	158	# define EV_USE_PORT 0
67	#endif	159	#endif
68		160
69	/**/	161	/**/
70		162
71	#ifndef CLOCK_MONOTONIC	163	#ifndef CLOCK_MONOTONIC
…		…
76	#ifndef CLOCK_REALTIME	168	#ifndef CLOCK_REALTIME
77	# undef EV_USE_REALTIME	169	# undef EV_USE_REALTIME
78	# define EV_USE_REALTIME 0	170	# define EV_USE_REALTIME 0
79	#endif	171	#endif
80		172
		173	#if EV_SELECT_IS_WINSOCKET
		174	# include <winsock.h>
		175	#endif
		176
81	/**/	177	/**/
82		178
83	#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) */
84	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */	180	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
85	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */	181	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
86	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */	182	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
87		183
		184	#ifdef EV_H
		185	# include EV_H
		186	#else
88	#include "ev.h"	187	# include "ev.h"
		188	#endif
89		189
90	#if __GNUC__ >= 3	190	#if __GNUC__ >= 3
91	# define expect(expr,value) __builtin_expect ((expr),(value))	191	# define expect(expr,value) __builtin_expect ((expr),(value))
		192	# define inline_size static inline /* inline for codesize */
		193	# if EV_MINIMAL
92	# define inline inline	194	# define noinline __attribute__ ((noinline))
		195	# define inline_speed static noinline
		196	# else
		197	# define noinline
		198	# define inline_speed static inline
		199	# endif
93	#else	200	#else
94	# define expect(expr,value) (expr)	201	# define expect(expr,value) (expr)
		202	# define inline_speed static
95	# define inline static	203	# define inline_size static
		204	# define noinline
96	#endif	205	#endif
97		206
98	#define expect_false(expr) expect ((expr) != 0, 0)	207	#define expect_false(expr) expect ((expr) != 0, 0)
99	#define expect_true(expr) expect ((expr) != 0, 1)	208	#define expect_true(expr) expect ((expr) != 0, 1)
100		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
101	typedef struct ev_watcher *W;	216	typedef ev_watcher *W;
102	typedef struct ev_watcher_list *WL;	217	typedef ev_watcher_list *WL;
103	typedef struct ev_watcher_time *WT;	218	typedef ev_watcher_time *WT;
104		219
105	static ev_tstamp now_floor, now, diff; /* monotonic clock */	220	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		221
		222	#ifdef _WIN32
		223	# include "ev_win32.c"
		224	#endif
		225
		226	/*****************************************************************************/
		227
		228	static void (*syserr_cb)(const char *msg);
		229
		230	void
		231	ev_set_syserr_cb (void (*cb)(const char *msg))
		232	{
		233	syserr_cb = cb;
		234	}
		235
		236	static void noinline
		237	syserr (const char *msg)
		238	{
		239	if (!msg)
		240	msg = "(libev) system error";
		241
		242	if (syserr_cb)
		243	syserr_cb (msg);
		244	else
		245	{
		246	perror (msg);
		247	abort ();
		248	}
		249	}
		250
		251	static void *(*alloc)(void *ptr, long size);
		252
		253	void
		254	ev_set_allocator (void *(*cb)(void *ptr, long size))
		255	{
		256	alloc = cb;
		257	}
		258
		259	static void *
		260	ev_realloc (void *ptr, long size)
		261	{
		262	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		263
		264	if (!ptr && size)
		265	{
		266	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		267	abort ();
		268	}
		269
		270	return ptr;
		271	}
		272
		273	#define ev_malloc(size) ev_realloc (0, (size))
		274	#define ev_free(ptr) ev_realloc ((ptr), 0)
		275
		276	/*****************************************************************************/
		277
		278	typedef struct
		279	{
		280	WL head;
		281	unsigned char events;
		282	unsigned char reify;
		283	#if EV_SELECT_IS_WINSOCKET
		284	SOCKET handle;
		285	#endif
		286	} ANFD;
		287
		288	typedef struct
		289	{
		290	W w;
		291	int events;
		292	} ANPENDING;
		293
		294	#if EV_MULTIPLICITY
		295
		296	struct ev_loop
		297	{
		298	ev_tstamp ev_rt_now;
		299	#define ev_rt_now ((loop)->ev_rt_now)
		300	#define VAR(name,decl) decl;
		301	#include "ev_vars.h"
		302	#undef VAR
		303	};
		304	#include "ev_wrap.h"
		305
		306	static struct ev_loop default_loop_struct;
		307	struct ev_loop *ev_default_loop_ptr;
		308
		309	#else
		310
106	ev_tstamp ev_now;	311	ev_tstamp ev_rt_now;
107	int ev_method;	312	#define VAR(name,decl) static decl;
		313	#include "ev_vars.h"
		314	#undef VAR
108		315
109	static int have_monotonic; /* runtime */	316	static int ev_default_loop_ptr;
110		317
111	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	318	#endif
112	static void (*method_modify)(int fd, int oev, int nev);
113	static void (*method_poll)(ev_tstamp timeout);
114		319
115	/*****************************************************************************/	320	/*****************************************************************************/
116		321
117	ev_tstamp	322	ev_tstamp
118	ev_time (void)	323	ev_time (void)
…		…
126	gettimeofday (&tv, 0);	331	gettimeofday (&tv, 0);
127	return tv.tv_sec + tv.tv_usec * 1e-6;	332	return tv.tv_sec + tv.tv_usec * 1e-6;
128	#endif	333	#endif
129	}	334	}
130		335
131	static ev_tstamp	336	ev_tstamp inline_size
132	get_clock (void)	337	get_clock (void)
133	{	338	{
134	#if EV_USE_MONOTONIC	339	#if EV_USE_MONOTONIC
135	if (expect_true (have_monotonic))	340	if (expect_true (have_monotonic))
136	{	341	{
…		…
141	#endif	346	#endif
142		347
143	return ev_time ();	348	return ev_time ();
144	}	349	}
145		350
		351	#if EV_MULTIPLICITY
		352	ev_tstamp
		353	ev_now (EV_P)
		354	{
		355	return ev_rt_now;
		356	}
		357	#endif
		358
146	#define array_roundsize(base,n) ((n) | 4 & ~3)	359	#define array_roundsize(type,n) (((n) | 4) & ~3)
147		360
148	#define array_needsize(base,cur,cnt,init) \	361	#define array_needsize(type,base,cur,cnt,init) \
149	if (expect_false ((cnt) > cur)) \	362	if (expect_false ((cnt) > cur)) \
150	{ \	363	{ \
151	int newcnt = cur; \	364	int newcnt = cur; \
152	do \	365	do \
153	{ \	366	{ \
154	newcnt = array_roundsize (base, newcnt << 1); \	367	newcnt = array_roundsize (type, newcnt << 1); \
155	} \	368	} \
156	while ((cnt) > newcnt); \	369	while ((cnt) > newcnt); \
157	\	370	\
158	base = realloc (base, sizeof (*base) * (newcnt)); \	371	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
159	init (base + cur, newcnt - cur); \	372	init (base + cur, newcnt - cur); \
160	cur = newcnt; \	373	cur = newcnt; \
161	}	374	}
		375
		376	#define array_slim(type,stem) \
		377	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		378	{ \
		379	stem ## max = array_roundsize (stem ## cnt >> 1); \
		380	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		381	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		382	}
		383
		384	#define array_free(stem, idx) \
		385	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
162		386
163	/*****************************************************************************/	387	/*****************************************************************************/
164		388
165	typedef struct	389	void noinline
		390	ev_feed_event (EV_P_ void *w, int revents)
166	{	391	{
167	struct ev_io *head;	392	W w_ = (W)w;
168	unsigned char events;
169	unsigned char reify;
170	} ANFD;
171		393
172	static ANFD *anfds;	394	if (expect_false (w_->pending))
173	static int anfdmax;	395	{
		396	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		397	return;
		398	}
174		399
175	static void	400	w_->pending = ++pendingcnt [ABSPRI (w_)];
		401	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
		402	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		403	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		404	}
		405
		406	void inline_size
		407	queue_events (EV_P_ W *events, int eventcnt, int type)
		408	{
		409	int i;
		410
		411	for (i = 0; i < eventcnt; ++i)
		412	ev_feed_event (EV_A_ events [i], type);
		413	}
		414
		415	/*****************************************************************************/
		416
		417	void inline_size
176	anfds_init (ANFD *base, int count)	418	anfds_init (ANFD *base, int count)
177	{	419	{
178	while (count--)	420	while (count--)
179	{	421	{
180	base->head = 0;	422	base->head = 0;
…		…
183		425
184	++base;	426	++base;
185	}	427	}
186	}	428	}
187		429
188	typedef struct	430	void inline_speed
189	{
190	W w;
191	int events;
192	} ANPENDING;
193
194	static ANPENDING *pendings;
195	static int pendingmax, pendingcnt;
196
197	static void
198	event (W w, int events)
199	{
200	if (w->pending)
201	{
202	pendings [w->pending - 1].events |= events;
203	return;
204	}
205
206	w->pending = ++pendingcnt;
207	array_needsize (pendings, pendingmax, pendingcnt, );
208	pendings [pendingcnt - 1].w = w;
209	pendings [pendingcnt - 1].events = events;
210	}
211
212	static void
213	queue_events (W *events, int eventcnt, int type)
214	{
215	int i;
216
217	for (i = 0; i < eventcnt; ++i)
218	event (events [i], type);
219	}
220
221	static void
222	fd_event (int fd, int events)	431	fd_event (EV_P_ int fd, int revents)
223	{	432	{
224	ANFD *anfd = anfds + fd;	433	ANFD *anfd = anfds + fd;
225	struct ev_io *w;	434	ev_io *w;
226		435
227	for (w = anfd->head; w; w = w->next)	436	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
228	{	437	{
229	int ev = w->events & events;	438	int ev = w->events & revents;
230		439
231	if (ev)	440	if (ev)
232	event ((W)w, ev);	441	ev_feed_event (EV_A_ (W)w, ev);
233	}	442	}
234	}	443	}
235		444
236	/*****************************************************************************/	445	void
		446	ev_feed_fd_event (EV_P_ int fd, int revents)
		447	{
		448	fd_event (EV_A_ fd, revents);
		449	}
237		450
238	static int *fdchanges;	451	void inline_size
239	static int fdchangemax, fdchangecnt;	452	fd_reify (EV_P)
240
241	static void
242	fd_reify (void)
243	{	453	{
244	int i;	454	int i;
245		455
246	for (i = 0; i < fdchangecnt; ++i)	456	for (i = 0; i < fdchangecnt; ++i)
247	{	457	{
248	int fd = fdchanges [i];	458	int fd = fdchanges [i];
249	ANFD *anfd = anfds + fd;	459	ANFD *anfd = anfds + fd;
250	struct ev_io *w;	460	ev_io *w;
251		461
252	int events = 0;	462	int events = 0;
253		463
254	for (w = anfd->head; w; w = w->next)	464	for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
255	events |= w->events;	465	events |= w->events;
256		466
		467	#if EV_SELECT_IS_WINSOCKET
		468	if (events)
		469	{
		470	unsigned long argp;
		471	anfd->handle = _get_osfhandle (fd);
		472	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
		473	}
		474	#endif
		475
257	anfd->reify = 0;	476	anfd->reify = 0;
258		477
259	if (anfd->events != events)
260	{
261	method_modify (fd, anfd->events, events);	478	backend_modify (EV_A_ fd, anfd->events, events);
262	anfd->events = events;	479	anfd->events = events;
263	}
264	}	480	}
265		481
266	fdchangecnt = 0;	482	fdchangecnt = 0;
267	}	483	}
268		484
269	static void	485	void inline_size
270	fd_change (int fd)	486	fd_change (EV_P_ int fd)
271	{	487	{
272	if (anfds [fd].reify || fdchangecnt < 0)	488	if (expect_false (anfds [fd].reify))
273	return;	489	return;
274		490
275	anfds [fd].reify = 1;	491	anfds [fd].reify = 1;
276		492
277	++fdchangecnt;	493	++fdchangecnt;
278	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	494	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
279	fdchanges [fdchangecnt - 1] = fd;	495	fdchanges [fdchangecnt - 1] = fd;
280	}	496	}
281		497
		498	void inline_speed
		499	fd_kill (EV_P_ int fd)
		500	{
		501	ev_io *w;
		502
		503	while ((w = (ev_io *)anfds [fd].head))
		504	{
		505	ev_io_stop (EV_A_ w);
		506	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		507	}
		508	}
		509
		510	int inline_size
		511	fd_valid (int fd)
		512	{
		513	#ifdef _WIN32
		514	return _get_osfhandle (fd) != -1;
		515	#else
		516	return fcntl (fd, F_GETFD) != -1;
		517	#endif
		518	}
		519
282	/* called on EBADF to verify fds */	520	/* called on EBADF to verify fds */
283	static void	521	static void noinline
284	fd_recheck (void)	522	fd_ebadf (EV_P)
285	{	523	{
286	int fd;	524	int fd;
287		525
288	for (fd = 0; fd < anfdmax; ++fd)	526	for (fd = 0; fd < anfdmax; ++fd)
289	if (anfds [fd].events)	527	if (anfds [fd].events)
290	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	528	if (!fd_valid (fd) == -1 && errno == EBADF)
291	while (anfds [fd].head)	529	fd_kill (EV_A_ fd);
		530	}
		531
		532	/* called on ENOMEM in select/poll to kill some fds and retry */
		533	static void noinline
		534	fd_enomem (EV_P)
		535	{
		536	int fd;
		537
		538	for (fd = anfdmax; fd--; )
		539	if (anfds [fd].events)
292	{	540	{
293	ev_io_stop (anfds [fd].head);	541	fd_kill (EV_A_ fd);
294	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	542	return;
295	}	543	}
		544	}
		545
		546	/* usually called after fork if backend needs to re-arm all fds from scratch */
		547	static void noinline
		548	fd_rearm_all (EV_P)
		549	{
		550	int fd;
		551
		552	/* this should be highly optimised to not do anything but set a flag */
		553	for (fd = 0; fd < anfdmax; ++fd)
		554	if (anfds [fd].events)
		555	{
		556	anfds [fd].events = 0;
		557	fd_change (EV_A_ fd);
		558	}
296	}	559	}
297		560
298	/*****************************************************************************/	561	/*****************************************************************************/
299		562
300	static struct ev_timer **timers;	563	void inline_speed
301	static int timermax, timercnt;
302
303	static struct ev_periodic **periodics;
304	static int periodicmax, periodiccnt;
305
306	static void
307	upheap (WT *timers, int k)	564	upheap (WT *heap, int k)
308	{	565	{
309	WT w = timers [k];	566	WT w = heap [k];
310		567
311	while (k && timers [k >> 1]->at > w->at)	568	while (k && heap [k >> 1]->at > w->at)
312	{	569	{
313	timers [k] = timers [k >> 1];	570	heap [k] = heap [k >> 1];
314	timers [k]->active = k + 1;	571	((W)heap [k])->active = k + 1;
315	k >>= 1;	572	k >>= 1;
316	}	573	}
317		574
318	timers [k] = w;	575	heap [k] = w;
319	timers [k]->active = k + 1;	576	((W)heap [k])->active = k + 1;
320		577
321	}	578	}
322		579
323	static void	580	void inline_speed
324	downheap (WT *timers, int N, int k)	581	downheap (WT *heap, int N, int k)
325	{	582	{
326	WT w = timers [k];	583	WT w = heap [k];
327		584
328	while (k < (N >> 1))	585	while (k < (N >> 1))
329	{	586	{
330	int j = k << 1;	587	int j = k << 1;
331		588
332	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	589	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
333	++j;	590	++j;
334		591
335	if (w->at <= timers [j]->at)	592	if (w->at <= heap [j]->at)
336	break;	593	break;
337		594
338	timers [k] = timers [j];	595	heap [k] = heap [j];
339	timers [k]->active = k + 1;	596	((W)heap [k])->active = k + 1;
340	k = j;	597	k = j;
341	}	598	}
342		599
343	timers [k] = w;	600	heap [k] = w;
344	timers [k]->active = k + 1;	601	((W)heap [k])->active = k + 1;
		602	}
		603
		604	void inline_size
		605	adjustheap (WT *heap, int N, int k)
		606	{
		607	upheap (heap, k);
		608	downheap (heap, N, k);
345	}	609	}
346		610
347	/*****************************************************************************/	611	/*****************************************************************************/
348		612
349	typedef struct	613	typedef struct
350	{	614	{
351	struct ev_signal *head;	615	WL head;
352	sig_atomic_t volatile gotsig;	616	sig_atomic_t volatile gotsig;
353	} ANSIG;	617	} ANSIG;
354		618
355	static ANSIG *signals;	619	static ANSIG *signals;
356	static int signalmax;	620	static int signalmax;
357		621
358	static int sigpipe [2];	622	static int sigpipe [2];
359	static sig_atomic_t volatile gotsig;	623	static sig_atomic_t volatile gotsig;
360	static struct ev_io sigev;	624	static ev_io sigev;
361		625
362	static void	626	void inline_size
363	signals_init (ANSIG *base, int count)	627	signals_init (ANSIG *base, int count)
364	{	628	{
365	while (count--)	629	while (count--)
366	{	630	{
367	base->head = 0;	631	base->head = 0;
…		…
372	}	636	}
373		637
374	static void	638	static void
375	sighandler (int signum)	639	sighandler (int signum)
376	{	640	{
		641	#if _WIN32
		642	signal (signum, sighandler);
		643	#endif
		644
377	signals [signum - 1].gotsig = 1;	645	signals [signum - 1].gotsig = 1;
378		646
379	if (!gotsig)	647	if (!gotsig)
380	{	648	{
		649	int old_errno = errno;
381	gotsig = 1;	650	gotsig = 1;
382	write (sigpipe [1], &signum, 1);	651	write (sigpipe [1], &signum, 1);
		652	errno = old_errno;
383	}	653	}
		654	}
		655
		656	void noinline
		657	ev_feed_signal_event (EV_P_ int signum)
		658	{
		659	WL w;
		660
		661	#if EV_MULTIPLICITY
		662	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		663	#endif
		664
		665	--signum;
		666
		667	if (signum < 0 || signum >= signalmax)
		668	return;
		669
		670	signals [signum].gotsig = 0;
		671
		672	for (w = signals [signum].head; w; w = w->next)
		673	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
384	}	674	}
385		675
386	static void	676	static void
387	sigcb (struct ev_io *iow, int revents)	677	sigcb (EV_P_ ev_io *iow, int revents)
388	{	678	{
389	struct ev_signal *w;
390	int signum;	679	int signum;
391		680
392	read (sigpipe [0], &revents, 1);	681	read (sigpipe [0], &revents, 1);
393	gotsig = 0;	682	gotsig = 0;
394		683
395	for (signum = signalmax; signum--; )	684	for (signum = signalmax; signum--; )
396	if (signals [signum].gotsig)	685	if (signals [signum].gotsig)
		686	ev_feed_signal_event (EV_A_ signum + 1);
		687	}
		688
		689	void inline_size
		690	fd_intern (int fd)
		691	{
		692	#ifdef _WIN32
		693	int arg = 1;
		694	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
		695	#else
		696	fcntl (fd, F_SETFD, FD_CLOEXEC);
		697	fcntl (fd, F_SETFL, O_NONBLOCK);
		698	#endif
		699	}
		700
		701	static void noinline
		702	siginit (EV_P)
		703	{
		704	fd_intern (sigpipe [0]);
		705	fd_intern (sigpipe [1]);
		706
		707	ev_io_set (&sigev, sigpipe [0], EV_READ);
		708	ev_io_start (EV_A_ &sigev);
		709	ev_unref (EV_A); /* child watcher should not keep loop alive */
		710	}
		711
		712	/*****************************************************************************/
		713
		714	static ev_child *childs [PID_HASHSIZE];
		715
		716	#ifndef _WIN32
		717
		718	static ev_signal childev;
		719
		720	void inline_speed
		721	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		722	{
		723	ev_child *w;
		724
		725	for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		726	if (w->pid == pid || !w->pid)
397	{	727	{
398	signals [signum].gotsig = 0;	728	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
399		729	w->rpid = pid;
400	for (w = signals [signum].head; w; w = w->next)	730	w->rstatus = status;
401	event ((W)w, EV_SIGNAL);	731	ev_feed_event (EV_A_ (W)w, EV_CHILD);
402	}	732	}
403	}	733	}
404
405	static void
406	siginit (void)
407	{
408	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
409	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
410
411	/* rather than sort out wether we really need nb, set it */
412	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
413	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
414
415	ev_io_set (&sigev, sigpipe [0], EV_READ);
416	ev_io_start (&sigev);
417	}
418
419	/*****************************************************************************/
420
421	static struct ev_idle **idles;
422	static int idlemax, idlecnt;
423
424	static struct ev_prepare **prepares;
425	static int preparemax, preparecnt;
426
427	static struct ev_check **checks;
428	static int checkmax, checkcnt;
429
430	/*****************************************************************************/
431
432	static struct ev_child *childs [PID_HASHSIZE];
433	static struct ev_signal childev;
434		734
435	#ifndef WCONTINUED	735	#ifndef WCONTINUED
436	# define WCONTINUED 0	736	# define WCONTINUED 0
437	#endif	737	#endif
438		738
439	static void	739	static void
440	childcb (struct ev_signal *sw, int revents)	740	childcb (EV_P_ ev_signal *sw, int revents)
441	{	741	{
442	struct ev_child *w;
443	int pid, status;	742	int pid, status;
444		743
		744	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
445	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	745	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
446	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	746	if (!WCONTINUED
447	if (w->pid == pid || !w->pid)	747	|| errno != EINVAL
448	{	748	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
449	w->status = status;	749	return;
450	event ((W)w, EV_CHILD);	750
451	}	751	/* make sure we are called again until all childs have been reaped */
		752	/* we need to do it this way so that the callback gets called before we continue */
		753	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		754
		755	child_reap (EV_A_ sw, pid, pid, status);
		756	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
452	}	757	}
		758
		759	#endif
453		760
454	/*****************************************************************************/	761	/*****************************************************************************/
455		762
		763	#if EV_USE_PORT
		764	# include "ev_port.c"
		765	#endif
		766	#if EV_USE_KQUEUE
		767	# include "ev_kqueue.c"
		768	#endif
456	#if EV_USE_EPOLL	769	#if EV_USE_EPOLL
457	# include "ev_epoll.c"	770	# include "ev_epoll.c"
458	#endif	771	#endif
		772	#if EV_USE_POLL
		773	# include "ev_poll.c"
		774	#endif
459	#if EV_USE_SELECT	775	#if EV_USE_SELECT
460	# include "ev_select.c"	776	# include "ev_select.c"
461	#endif	777	#endif
462		778
463	int	779	int
…		…
470	ev_version_minor (void)	786	ev_version_minor (void)
471	{	787	{
472	return EV_VERSION_MINOR;	788	return EV_VERSION_MINOR;
473	}	789	}
474		790
475	int ev_init (int flags)	791	/* return true if we are running with elevated privileges and should ignore env variables */
		792	int inline_size
		793	enable_secure (void)
476	{	794	{
477	if (!ev_method)	795	#ifdef _WIN32
		796	return 0;
		797	#else
		798	return getuid () != geteuid ()
		799	|| getgid () != getegid ();
		800	#endif
		801	}
		802
		803	unsigned int
		804	ev_supported_backends (void)
		805	{
		806	unsigned int flags = 0;
		807
		808	if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
		809	if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
		810	if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
		811	if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
		812	if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
		813
		814	return flags;
		815	}
		816
		817	unsigned int
		818	ev_recommended_backends (void)
		819	{
		820	unsigned int flags = ev_supported_backends ();
		821
		822	#ifndef __NetBSD__
		823	/* kqueue is borked on everything but netbsd apparently */
		824	/* it usually doesn't work correctly on anything but sockets and pipes */
		825	flags &= ~EVBACKEND_KQUEUE;
		826	#endif
		827	#ifdef __APPLE__
		828	// flags &= ~EVBACKEND_KQUEUE; for documentation
		829	flags &= ~EVBACKEND_POLL;
		830	#endif
		831
		832	return flags;
		833	}
		834
		835	unsigned int
		836	ev_embeddable_backends (void)
		837	{
		838	return EVBACKEND_EPOLL
		839	| EVBACKEND_KQUEUE
		840	| EVBACKEND_PORT;
		841	}
		842
		843	unsigned int
		844	ev_backend (EV_P)
		845	{
		846	return backend;
		847	}
		848
		849	static void
		850	loop_init (EV_P_ unsigned int flags)
		851	{
		852	if (!backend)
478	{	853	{
479	#if EV_USE_MONOTONIC	854	#if EV_USE_MONOTONIC
480	{	855	{
481	struct timespec ts;	856	struct timespec ts;
482	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	857	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
483	have_monotonic = 1;	858	have_monotonic = 1;
484	}	859	}
485	#endif	860	#endif
486		861
487	ev_now = ev_time ();	862	ev_rt_now = ev_time ();
488	now = get_clock ();	863	mn_now = get_clock ();
489	now_floor = now;	864	now_floor = mn_now;
490	diff = ev_now - now;	865	rtmn_diff = ev_rt_now - mn_now;
491		866
492	if (pipe (sigpipe))	867	if (!(flags & EVFLAG_NOENV)
493	return 0;	868	&& !enable_secure ()
		869	&& getenv ("LIBEV_FLAGS"))
		870	flags = atoi (getenv ("LIBEV_FLAGS"));
494		871
495	ev_method = EVMETHOD_NONE;	872	if (!(flags & 0x0000ffffUL))
		873	flags |= ev_recommended_backends ();
		874
		875	backend = 0;
		876	#if EV_USE_PORT
		877	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
		878	#endif
		879	#if EV_USE_KQUEUE
		880	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
		881	#endif
496	#if EV_USE_EPOLL	882	#if EV_USE_EPOLL
497	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	883	if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
		884	#endif
		885	#if EV_USE_POLL
		886	if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
498	#endif	887	#endif
499	#if EV_USE_SELECT	888	#if EV_USE_SELECT
500	if (ev_method == EVMETHOD_NONE) select_init (flags);	889	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
501	#endif	890	#endif
502		891
503	if (ev_method)	892	ev_init (&sigev, sigcb);
		893	ev_set_priority (&sigev, EV_MAXPRI);
		894	}
		895	}
		896
		897	static void
		898	loop_destroy (EV_P)
		899	{
		900	int i;
		901
		902	#if EV_USE_PORT
		903	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
		904	#endif
		905	#if EV_USE_KQUEUE
		906	if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
		907	#endif
		908	#if EV_USE_EPOLL
		909	if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
		910	#endif
		911	#if EV_USE_POLL
		912	if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
		913	#endif
		914	#if EV_USE_SELECT
		915	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
		916	#endif
		917
		918	for (i = NUMPRI; i--; )
		919	array_free (pending, [i]);
		920
		921	/* have to use the microsoft-never-gets-it-right macro */
		922	array_free (fdchange, EMPTY0);
		923	array_free (timer, EMPTY0);
		924	#if EV_PERIODIC_ENABLE
		925	array_free (periodic, EMPTY0);
		926	#endif
		927	array_free (idle, EMPTY0);
		928	array_free (prepare, EMPTY0);
		929	array_free (check, EMPTY0);
		930
		931	backend = 0;
		932	}
		933
		934	static void
		935	loop_fork (EV_P)
		936	{
		937	#if EV_USE_PORT
		938	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
		939	#endif
		940	#if EV_USE_KQUEUE
		941	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
		942	#endif
		943	#if EV_USE_EPOLL
		944	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		945	#endif
		946
		947	if (ev_is_active (&sigev))
		948	{
		949	/* default loop */
		950
		951	ev_ref (EV_A);
		952	ev_io_stop (EV_A_ &sigev);
		953	close (sigpipe [0]);
		954	close (sigpipe [1]);
		955
		956	while (pipe (sigpipe))
		957	syserr ("(libev) error creating pipe");
		958
		959	siginit (EV_A);
		960	}
		961
		962	postfork = 0;
		963	}
		964
		965	#if EV_MULTIPLICITY
		966	struct ev_loop *
		967	ev_loop_new (unsigned int flags)
		968	{
		969	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		970
		971	memset (loop, 0, sizeof (struct ev_loop));
		972
		973	loop_init (EV_A_ flags);
		974
		975	if (ev_backend (EV_A))
		976	return loop;
		977
		978	return 0;
		979	}
		980
		981	void
		982	ev_loop_destroy (EV_P)
		983	{
		984	loop_destroy (EV_A);
		985	ev_free (loop);
		986	}
		987
		988	void
		989	ev_loop_fork (EV_P)
		990	{
		991	postfork = 1;
		992	}
		993
		994	#endif
		995
		996	#if EV_MULTIPLICITY
		997	struct ev_loop *
		998	ev_default_loop_init (unsigned int flags)
		999	#else
		1000	int
		1001	ev_default_loop (unsigned int flags)
		1002	#endif
		1003	{
		1004	if (sigpipe [0] == sigpipe [1])
		1005	if (pipe (sigpipe))
		1006	return 0;
		1007
		1008	if (!ev_default_loop_ptr)
		1009	{
		1010	#if EV_MULTIPLICITY
		1011	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
		1012	#else
		1013	ev_default_loop_ptr = 1;
		1014	#endif
		1015
		1016	loop_init (EV_A_ flags);
		1017
		1018	if (ev_backend (EV_A))
504	{	1019	{
505	ev_watcher_init (&sigev, sigcb);
506	siginit ();	1020	siginit (EV_A);
507		1021
		1022	#ifndef _WIN32
508	ev_signal_init (&childev, childcb, SIGCHLD);	1023	ev_signal_init (&childev, childcb, SIGCHLD);
		1024	ev_set_priority (&childev, EV_MAXPRI);
509	ev_signal_start (&childev);	1025	ev_signal_start (EV_A_ &childev);
		1026	ev_unref (EV_A); /* child watcher should not keep loop alive */
		1027	#endif
510	}	1028	}
		1029	else
		1030	ev_default_loop_ptr = 0;
511	}	1031	}
512		1032
513	return ev_method;	1033	return ev_default_loop_ptr;
		1034	}
		1035
		1036	void
		1037	ev_default_destroy (void)
		1038	{
		1039	#if EV_MULTIPLICITY
		1040	struct ev_loop *loop = ev_default_loop_ptr;
		1041	#endif
		1042
		1043	#ifndef _WIN32
		1044	ev_ref (EV_A); /* child watcher */
		1045	ev_signal_stop (EV_A_ &childev);
		1046	#endif
		1047
		1048	ev_ref (EV_A); /* signal watcher */
		1049	ev_io_stop (EV_A_ &sigev);
		1050
		1051	close (sigpipe [0]); sigpipe [0] = 0;
		1052	close (sigpipe [1]); sigpipe [1] = 0;
		1053
		1054	loop_destroy (EV_A);
		1055	}
		1056
		1057	void
		1058	ev_default_fork (void)
		1059	{
		1060	#if EV_MULTIPLICITY
		1061	struct ev_loop *loop = ev_default_loop_ptr;
		1062	#endif
		1063
		1064	if (backend)
		1065	postfork = 1;
514	}	1066	}
515		1067
516	/*****************************************************************************/	1068	/*****************************************************************************/
517		1069
518	void	1070	int inline_size
519	ev_fork_prepare (void)	1071	any_pending (EV_P)
520	{	1072	{
521	/* nop */	1073	int pri;
522	}
523		1074
524	void	1075	for (pri = NUMPRI; pri--; )
525	ev_fork_parent (void)	1076	if (pendingcnt [pri])
526	{	1077	return 1;
527	/* nop */
528	}
529		1078
530	void	1079	return 0;
531	ev_fork_child (void)
532	{
533	#if EV_USE_EPOLL
534	if (ev_method == EVMETHOD_EPOLL)
535	epoll_postfork_child ();
536	#endif
537
538	ev_io_stop (&sigev);
539	close (sigpipe [0]);
540	close (sigpipe [1]);
541	pipe (sigpipe);
542	siginit ();
543	}	1080	}
544		1081
545	/*****************************************************************************/	1082	void inline_speed
546
547	static void
548	call_pending (void)	1083	call_pending (EV_P)
549	{	1084	{
		1085	int pri;
		1086
		1087	for (pri = NUMPRI; pri--; )
550	while (pendingcnt)	1088	while (pendingcnt [pri])
551	{	1089	{
552	ANPENDING *p = pendings + --pendingcnt;	1090	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
553		1091
554	if (p->w)	1092	if (expect_true (p->w))
555	{	1093	{
		1094	assert (("non-pending watcher on pending list", p->w->pending));
		1095
556	p->w->pending = 0;	1096	p->w->pending = 0;
557	p->w->cb (p->w, p->events);	1097	EV_CB_INVOKE (p->w, p->events);
558	}	1098	}
559	}	1099	}
560	}	1100	}
561		1101
562	static void	1102	void inline_size
563	timers_reify (void)	1103	timers_reify (EV_P)
564	{	1104	{
565	while (timercnt && timers [0]->at <= now)	1105	while (timercnt && ((WT)timers [0])->at <= mn_now)
566	{	1106	{
567	struct ev_timer *w = timers [0];	1107	ev_timer *w = timers [0];
		1108
		1109	assert (("inactive timer on timer heap detected", ev_is_active (w)));
568		1110
569	/* first reschedule or stop timer */	1111	/* first reschedule or stop timer */
570	if (w->repeat)	1112	if (w->repeat)
571	{	1113	{
572	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1114	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1115
573	w->at = now + w->repeat;	1116	((WT)w)->at += w->repeat;
		1117	if (((WT)w)->at < mn_now)
		1118	((WT)w)->at = mn_now;
		1119
574	downheap ((WT *)timers, timercnt, 0);	1120	downheap ((WT *)timers, timercnt, 0);
575	}	1121	}
576	else	1122	else
577	ev_timer_stop (w); /* nonrepeating: stop timer */	1123	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
578		1124
579	event ((W)w, EV_TIMEOUT);	1125	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
580	}	1126	}
581	}	1127	}
582		1128
583	static void	1129	#if EV_PERIODIC_ENABLE
		1130	void inline_size
584	periodics_reify (void)	1131	periodics_reify (EV_P)
585	{	1132	{
586	while (periodiccnt && periodics [0]->at <= ev_now)	1133	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
587	{	1134	{
588	struct ev_periodic *w = periodics [0];	1135	ev_periodic *w = periodics [0];
		1136
		1137	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
589		1138
590	/* first reschedule or stop timer */	1139	/* first reschedule or stop timer */
591	if (w->interval)	1140	if (w->reschedule_cb)
592	{	1141	{
		1142	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
		1143	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
		1144	downheap ((WT *)periodics, periodiccnt, 0);
		1145	}
		1146	else if (w->interval)
		1147	{
593	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1148	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
594	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	1149	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
595	downheap ((WT *)periodics, periodiccnt, 0);	1150	downheap ((WT *)periodics, periodiccnt, 0);
596	}	1151	}
597	else	1152	else
598	ev_periodic_stop (w); /* nonrepeating: stop timer */	1153	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
599		1154
600	event ((W)w, EV_PERIODIC);	1155	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
601	}	1156	}
602	}	1157	}
603		1158
604	static void	1159	static void noinline
605	periodics_reschedule (ev_tstamp diff)	1160	periodics_reschedule (EV_P)
606	{	1161	{
607	int i;	1162	int i;
608		1163
609	/* adjust periodics after time jump */	1164	/* adjust periodics after time jump */
610	for (i = 0; i < periodiccnt; ++i)	1165	for (i = 0; i < periodiccnt; ++i)
611	{	1166	{
612	struct ev_periodic *w = periodics [i];	1167	ev_periodic *w = periodics [i];
613		1168
		1169	if (w->reschedule_cb)
		1170	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
614	if (w->interval)	1171	else if (w->interval)
615	{
616	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1172	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
617
618	if (fabs (diff) >= 1e-4)
619	{
620	ev_periodic_stop (w);
621	ev_periodic_start (w);
622
623	i = 0; /* restart loop, inefficient, but time jumps should be rare */
624	}
625	}
626	}	1173	}
627	}
628		1174
629	static int	1175	/* now rebuild the heap */
		1176	for (i = periodiccnt >> 1; i--; )
		1177	downheap ((WT *)periodics, periodiccnt, i);
		1178	}
		1179	#endif
		1180
		1181	int inline_size
630	time_update_monotonic (void)	1182	time_update_monotonic (EV_P)
631	{	1183	{
632	now = get_clock ();	1184	mn_now = get_clock ();
633		1185
634	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))	1186	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
635	{	1187	{
636	ev_now = now + diff;	1188	ev_rt_now = rtmn_diff + mn_now;
637	return 0;	1189	return 0;
638	}	1190	}
639	else	1191	else
640	{	1192	{
641	now_floor = now;	1193	now_floor = mn_now;
642	ev_now = ev_time ();	1194	ev_rt_now = ev_time ();
643	return 1;	1195	return 1;
644	}	1196	}
645	}	1197	}
646		1198
647	static void	1199	void inline_size
648	time_update (void)	1200	time_update (EV_P)
649	{	1201	{
650	int i;	1202	int i;
651		1203
652	#if EV_USE_MONOTONIC	1204	#if EV_USE_MONOTONIC
653	if (expect_true (have_monotonic))	1205	if (expect_true (have_monotonic))
654	{	1206	{
655	if (time_update_monotonic ())	1207	if (time_update_monotonic (EV_A))
656	{	1208	{
657	ev_tstamp odiff = diff;	1209	ev_tstamp odiff = rtmn_diff;
658		1210
659	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1211	/* loop a few times, before making important decisions.
		1212	* on the choice of "4": one iteration isn't enough,
		1213	* in case we get preempted during the calls to
		1214	* ev_time and get_clock. a second call is almost guarenteed
		1215	* to succeed in that case, though. and looping a few more times
		1216	* doesn't hurt either as we only do this on time-jumps or
		1217	* in the unlikely event of getting preempted here.
		1218	*/
		1219	for (i = 4; --i; )
660	{	1220	{
661	diff = ev_now - now;	1221	rtmn_diff = ev_rt_now - mn_now;
662		1222
663	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1223	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
664	return; /* all is well */	1224	return; /* all is well */
665		1225
666	ev_now = ev_time ();	1226	ev_rt_now = ev_time ();
667	now = get_clock ();	1227	mn_now = get_clock ();
668	now_floor = now;	1228	now_floor = mn_now;
669	}	1229	}
670		1230
		1231	# if EV_PERIODIC_ENABLE
671	periodics_reschedule (diff - odiff);	1232	periodics_reschedule (EV_A);
		1233	# endif
672	/* no timer adjustment, as the monotonic clock doesn't jump */	1234	/* no timer adjustment, as the monotonic clock doesn't jump */
		1235	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
673	}	1236	}
674	}	1237	}
675	else	1238	else
676	#endif	1239	#endif
677	{	1240	{
678	ev_now = ev_time ();	1241	ev_rt_now = ev_time ();
679		1242
680	if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1243	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
681	{	1244	{
		1245	#if EV_PERIODIC_ENABLE
682	periodics_reschedule (ev_now - now);	1246	periodics_reschedule (EV_A);
		1247	#endif
683		1248
684	/* adjust timers. this is easy, as the offset is the same for all */	1249	/* adjust timers. this is easy, as the offset is the same for all */
685	for (i = 0; i < timercnt; ++i)	1250	for (i = 0; i < timercnt; ++i)
686	timers [i]->at += diff;	1251	((WT)timers [i])->at += ev_rt_now - mn_now;
687	}	1252	}
688		1253
689	now = ev_now;	1254	mn_now = ev_rt_now;
690	}	1255	}
691	}	1256	}
692		1257
693	int ev_loop_done;	1258	void
		1259	ev_ref (EV_P)
		1260	{
		1261	++activecnt;
		1262	}
694		1263
		1264	void
		1265	ev_unref (EV_P)
		1266	{
		1267	--activecnt;
		1268	}
		1269
		1270	static int loop_done;
		1271
		1272	void
695	void ev_loop (int flags)	1273	ev_loop (EV_P_ int flags)
696	{	1274	{
697	double block;
698	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1275	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
		1276	? EVUNLOOP_ONE
		1277	: EVUNLOOP_CANCEL;
699		1278
700	do	1279	while (activecnt)
701	{	1280	{
		1281	/* we might have forked, so reify kernel state if necessary */
		1282	if (expect_false (postfork))
		1283	if (forkcnt)
		1284	{
		1285	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1286	call_pending (EV_A);
		1287	}
		1288
702	/* queue check watchers (and execute them) */	1289	/* queue check watchers (and execute them) */
703	if (expect_false (preparecnt))	1290	if (expect_false (preparecnt))
704	{	1291	{
705	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1292	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
706	call_pending ();	1293	call_pending (EV_A);
707	}	1294	}
708		1295
		1296	/* we might have forked, so reify kernel state if necessary */
		1297	if (expect_false (postfork))
		1298	loop_fork (EV_A);
		1299
709	/* update fd-related kernel structures */	1300	/* update fd-related kernel structures */
710	fd_reify ();	1301	fd_reify (EV_A);
711		1302
712	/* calculate blocking time */	1303	/* calculate blocking time */
		1304	{
		1305	double block;
713		1306
714	/* we only need this for !monotonic clockor timers, but as we basically	1307	if (flags & EVLOOP_NONBLOCK || idlecnt)
715	always have timers, we just calculate it always */	1308	block = 0.; /* do not block at all */
		1309	else
		1310	{
		1311	/* update time to cancel out callback processing overhead */
716	#if EV_USE_MONOTONIC	1312	#if EV_USE_MONOTONIC
717	if (expect_true (have_monotonic))	1313	if (expect_true (have_monotonic))
718	time_update_monotonic ();	1314	time_update_monotonic (EV_A);
719	else	1315	else
720	#endif	1316	#endif
721	{	1317	{
722	ev_now = ev_time ();	1318	ev_rt_now = ev_time ();
723	now = ev_now;	1319	mn_now = ev_rt_now;
724	}	1320	}
725		1321
726	if (flags & EVLOOP_NONBLOCK || idlecnt)
727	block = 0.;
728	else
729	{
730	block = MAX_BLOCKTIME;	1322	block = MAX_BLOCKTIME;
731		1323
732	if (timercnt)	1324	if (timercnt)
733	{	1325	{
734	ev_tstamp to = timers [0]->at - now + method_fudge;	1326	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
735	if (block > to) block = to;	1327	if (block > to) block = to;
736	}	1328	}
737		1329
		1330	#if EV_PERIODIC_ENABLE
738	if (periodiccnt)	1331	if (periodiccnt)
739	{	1332	{
740	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1333	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
741	if (block > to) block = to;	1334	if (block > to) block = to;
742	}	1335	}
		1336	#endif
743		1337
744	if (block < 0.) block = 0.;	1338	if (expect_false (block < 0.)) block = 0.;
745	}	1339	}
746		1340
747	method_poll (block);	1341	backend_poll (EV_A_ block);
		1342	}
748		1343
749	/* update ev_now, do magic */	1344	/* update ev_rt_now, do magic */
750	time_update ();	1345	time_update (EV_A);
751		1346
752	/* queue pending timers and reschedule them */	1347	/* queue pending timers and reschedule them */
753	timers_reify (); /* relative timers called last */	1348	timers_reify (EV_A); /* relative timers called last */
		1349	#if EV_PERIODIC_ENABLE
754	periodics_reify (); /* absolute timers called first */	1350	periodics_reify (EV_A); /* absolute timers called first */
		1351	#endif
755		1352
756	/* queue idle watchers unless io or timers are pending */	1353	/* queue idle watchers unless other events are pending */
757	if (!pendingcnt)	1354	if (idlecnt && !any_pending (EV_A))
758	queue_events ((W *)idles, idlecnt, EV_IDLE);	1355	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
759		1356
760	/* queue check watchers, to be executed first */	1357	/* queue check watchers, to be executed first */
761	if (checkcnt)	1358	if (expect_false (checkcnt))
762	queue_events ((W *)checks, checkcnt, EV_CHECK);	1359	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
763		1360
764	call_pending ();	1361	call_pending (EV_A);
765	}
766	while (!ev_loop_done);
767		1362
768	if (ev_loop_done != 2)	1363	if (expect_false (loop_done))
		1364	break;
		1365	}
		1366
		1367	if (loop_done == EVUNLOOP_ONE)
		1368	loop_done = EVUNLOOP_CANCEL;
		1369	}
		1370
		1371	void
		1372	ev_unloop (EV_P_ int how)
		1373	{
769	ev_loop_done = 0;	1374	loop_done = how;
770	}	1375	}
771		1376
772	/*****************************************************************************/	1377	/*****************************************************************************/
773		1378
774	static void	1379	void inline_size
775	wlist_add (WL *head, WL elem)	1380	wlist_add (WL *head, WL elem)
776	{	1381	{
777	elem->next = *head;	1382	elem->next = *head;
778	*head = elem;	1383	*head = elem;
779	}	1384	}
780		1385
781	static void	1386	void inline_size
782	wlist_del (WL *head, WL elem)	1387	wlist_del (WL *head, WL elem)
783	{	1388	{
784	while (*head)	1389	while (*head)
785	{	1390	{
786	if (*head == elem)	1391	if (*head == elem)
…		…
791		1396
792	head = &(*head)->next;	1397	head = &(*head)->next;
793	}	1398	}
794	}	1399	}
795		1400
796	static void	1401	void inline_speed
797	ev_clear_pending (W w)	1402	ev_clear_pending (EV_P_ W w)
798	{	1403	{
799	if (w->pending)	1404	if (w->pending)
800	{	1405	{
801	pendings [w->pending - 1].w = 0;	1406	pendings [ABSPRI (w)][w->pending - 1].w = 0;
802	w->pending = 0;	1407	w->pending = 0;
803	}	1408	}
804	}	1409	}
805		1410
806	static void	1411	void inline_speed
807	ev_start (W w, int active)	1412	ev_start (EV_P_ W w, int active)
808	{	1413	{
		1414	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1415	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1416
809	w->active = active;	1417	w->active = active;
		1418	ev_ref (EV_A);
810	}	1419	}
811		1420
812	static void	1421	void inline_size
813	ev_stop (W w)	1422	ev_stop (EV_P_ W w)
814	{	1423	{
		1424	ev_unref (EV_A);
815	w->active = 0;	1425	w->active = 0;
816	}	1426	}
817		1427
818	/*****************************************************************************/	1428	/*****************************************************************************/
819		1429
820	void	1430	void
821	ev_io_start (struct ev_io *w)	1431	ev_io_start (EV_P_ ev_io *w)
822	{	1432	{
823	int fd = w->fd;	1433	int fd = w->fd;
824		1434
825	if (ev_is_active (w))	1435	if (expect_false (ev_is_active (w)))
826	return;	1436	return;
827		1437
828	assert (("ev_io_start called with negative fd", fd >= 0));	1438	assert (("ev_io_start called with negative fd", fd >= 0));
829		1439
830	ev_start ((W)w, 1);	1440	ev_start (EV_A_ (W)w, 1);
831	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1441	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
832	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1442	wlist_add ((WL *)&anfds[fd].head, (WL)w);
833		1443
834	fd_change (fd);	1444	fd_change (EV_A_ fd);
835	}	1445	}
836		1446
837	void	1447	void
838	ev_io_stop (struct ev_io *w)	1448	ev_io_stop (EV_P_ ev_io *w)
839	{	1449	{
840	ev_clear_pending ((W)w);	1450	ev_clear_pending (EV_A_ (W)w);
841	if (!ev_is_active (w))	1451	if (expect_false (!ev_is_active (w)))
842	return;	1452	return;
		1453
		1454	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
843		1455
844	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1456	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
845	ev_stop ((W)w);	1457	ev_stop (EV_A_ (W)w);
846		1458
847	fd_change (w->fd);	1459	fd_change (EV_A_ w->fd);
848	}	1460	}
849		1461
850	void	1462	void
851	ev_timer_start (struct ev_timer *w)	1463	ev_timer_start (EV_P_ ev_timer *w)
852	{	1464	{
853	if (ev_is_active (w))	1465	if (expect_false (ev_is_active (w)))
854	return;	1466	return;
855		1467
856	w->at += now;	1468	((WT)w)->at += mn_now;
857		1469
858	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1470	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
859		1471
860	ev_start ((W)w, ++timercnt);	1472	ev_start (EV_A_ (W)w, ++timercnt);
861	array_needsize (timers, timermax, timercnt, );	1473	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
862	timers [timercnt - 1] = w;	1474	timers [timercnt - 1] = w;
863	upheap ((WT *)timers, timercnt - 1);	1475	upheap ((WT *)timers, timercnt - 1);
864	}
865		1476
		1477	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1478	}
		1479
866	void	1480	void
867	ev_timer_stop (struct ev_timer *w)	1481	ev_timer_stop (EV_P_ ev_timer *w)
868	{	1482	{
869	ev_clear_pending ((W)w);	1483	ev_clear_pending (EV_A_ (W)w);
870	if (!ev_is_active (w))	1484	if (expect_false (!ev_is_active (w)))
871	return;	1485	return;
872		1486
		1487	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1488
873	if (w->active < timercnt--)	1489	if (expect_true (((W)w)->active < timercnt--))
874	{	1490	{
875	timers [w->active - 1] = timers [timercnt];	1491	timers [((W)w)->active - 1] = timers [timercnt];
876	downheap ((WT *)timers, timercnt, w->active - 1);	1492	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
877	}	1493	}
878		1494
879	w->at = w->repeat;	1495	((WT)w)->at -= mn_now;
880		1496
881	ev_stop ((W)w);	1497	ev_stop (EV_A_ (W)w);
882	}	1498	}
883		1499
884	void	1500	void
885	ev_timer_again (struct ev_timer *w)	1501	ev_timer_again (EV_P_ ev_timer *w)
886	{	1502	{
887	if (ev_is_active (w))	1503	if (ev_is_active (w))
888	{	1504	{
889	if (w->repeat)	1505	if (w->repeat)
890	{	1506	{
891	w->at = now + w->repeat;	1507	((WT)w)->at = mn_now + w->repeat;
892	downheap ((WT *)timers, timercnt, w->active - 1);	1508	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);
893	}	1509	}
894	else	1510	else
895	ev_timer_stop (w);	1511	ev_timer_stop (EV_A_ w);
896	}	1512	}
897	else if (w->repeat)	1513	else if (w->repeat)
		1514	{
		1515	w->at = w->repeat;
898	ev_timer_start (w);	1516	ev_timer_start (EV_A_ w);
		1517	}
899	}	1518	}
900		1519
		1520	#if EV_PERIODIC_ENABLE
901	void	1521	void
902	ev_periodic_start (struct ev_periodic *w)	1522	ev_periodic_start (EV_P_ ev_periodic *w)
903	{	1523	{
904	if (ev_is_active (w))	1524	if (expect_false (ev_is_active (w)))
905	return;	1525	return;
906		1526
		1527	if (w->reschedule_cb)
		1528	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
		1529	else if (w->interval)
		1530	{
907	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1531	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
908
909	/* this formula differs from the one in periodic_reify because we do not always round up */	1532	/* this formula differs from the one in periodic_reify because we do not always round up */
910	if (w->interval)
911	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1533	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1534	}
912		1535
913	ev_start ((W)w, ++periodiccnt);	1536	ev_start (EV_A_ (W)w, ++periodiccnt);
914	array_needsize (periodics, periodicmax, periodiccnt, );	1537	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
915	periodics [periodiccnt - 1] = w;	1538	periodics [periodiccnt - 1] = w;
916	upheap ((WT *)periodics, periodiccnt - 1);	1539	upheap ((WT *)periodics, periodiccnt - 1);
917	}
918		1540
		1541	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1542	}
		1543
919	void	1544	void
920	ev_periodic_stop (struct ev_periodic *w)	1545	ev_periodic_stop (EV_P_ ev_periodic *w)
921	{	1546	{
922	ev_clear_pending ((W)w);	1547	ev_clear_pending (EV_A_ (W)w);
923	if (!ev_is_active (w))	1548	if (expect_false (!ev_is_active (w)))
924	return;	1549	return;
925		1550
		1551	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1552
926	if (w->active < periodiccnt--)	1553	if (expect_true (((W)w)->active < periodiccnt--))
927	{	1554	{
928	periodics [w->active - 1] = periodics [periodiccnt];	1555	periodics [((W)w)->active - 1] = periodics [periodiccnt];
929	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1556	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
930	}	1557	}
931		1558
932	ev_stop ((W)w);	1559	ev_stop (EV_A_ (W)w);
933	}	1560	}
934		1561
935	void	1562	void
		1563	ev_periodic_again (EV_P_ ev_periodic *w)
		1564	{
		1565	/* TODO: use adjustheap and recalculation */
		1566	ev_periodic_stop (EV_A_ w);
		1567	ev_periodic_start (EV_A_ w);
		1568	}
		1569	#endif
		1570
		1571	#ifndef SA_RESTART
		1572	# define SA_RESTART 0
		1573	#endif
		1574
		1575	void
936	ev_signal_start (struct ev_signal *w)	1576	ev_signal_start (EV_P_ ev_signal *w)
937	{	1577	{
		1578	#if EV_MULTIPLICITY
		1579	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1580	#endif
938	if (ev_is_active (w))	1581	if (expect_false (ev_is_active (w)))
939	return;	1582	return;
940		1583
941	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1584	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
942		1585
943	ev_start ((W)w, 1);	1586	ev_start (EV_A_ (W)w, 1);
944	array_needsize (signals, signalmax, w->signum, signals_init);	1587	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
945	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1588	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
946		1589
947	if (!w->next)	1590	if (!((WL)w)->next)
948	{	1591	{
		1592	#if _WIN32
		1593	signal (w->signum, sighandler);
		1594	#else
949	struct sigaction sa;	1595	struct sigaction sa;
950	sa.sa_handler = sighandler;	1596	sa.sa_handler = sighandler;
951	sigfillset (&sa.sa_mask);	1597	sigfillset (&sa.sa_mask);
952	sa.sa_flags = 0;	1598	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
953	sigaction (w->signum, &sa, 0);	1599	sigaction (w->signum, &sa, 0);
		1600	#endif
954	}	1601	}
955	}	1602	}
956		1603
957	void	1604	void
958	ev_signal_stop (struct ev_signal *w)	1605	ev_signal_stop (EV_P_ ev_signal *w)
959	{	1606	{
960	ev_clear_pending ((W)w);	1607	ev_clear_pending (EV_A_ (W)w);
961	if (!ev_is_active (w))	1608	if (expect_false (!ev_is_active (w)))
962	return;	1609	return;
963		1610
964	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1611	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
965	ev_stop ((W)w);	1612	ev_stop (EV_A_ (W)w);
966		1613
967	if (!signals [w->signum - 1].head)	1614	if (!signals [w->signum - 1].head)
968	signal (w->signum, SIG_DFL);	1615	signal (w->signum, SIG_DFL);
969	}	1616	}
970		1617
971	void	1618	void
		1619	ev_child_start (EV_P_ ev_child *w)
		1620	{
		1621	#if EV_MULTIPLICITY
		1622	assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
		1623	#endif
		1624	if (expect_false (ev_is_active (w)))
		1625	return;
		1626
		1627	ev_start (EV_A_ (W)w, 1);
		1628	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1629	}
		1630
		1631	void
		1632	ev_child_stop (EV_P_ ev_child *w)
		1633	{
		1634	ev_clear_pending (EV_A_ (W)w);
		1635	if (expect_false (!ev_is_active (w)))
		1636	return;
		1637
		1638	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1639	ev_stop (EV_A_ (W)w);
		1640	}
		1641
		1642	#if EV_STAT_ENABLE
		1643
		1644	# ifdef _WIN32
		1645	# undef lstat
		1646	# define lstat(a,b) _stati64 (a,b)
		1647	# endif
		1648
		1649	#define DEF_STAT_INTERVAL 5.0074891
		1650	#define MIN_STAT_INTERVAL 0.1074891
		1651
		1652	void
		1653	ev_stat_stat (EV_P_ ev_stat *w)
		1654	{
		1655	if (lstat (w->path, &w->attr) < 0)
		1656	w->attr.st_nlink = 0;
		1657	else if (!w->attr.st_nlink)
		1658	w->attr.st_nlink = 1;
		1659	}
		1660
		1661	static void
		1662	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1663	{
		1664	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		1665
		1666	/* we copy this here each the time so that */
		1667	/* prev has the old value when the callback gets invoked */
		1668	w->prev = w->attr;
		1669	ev_stat_stat (EV_A_ w);
		1670
		1671	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
		1672	ev_feed_event (EV_A_ w, EV_STAT);
		1673	}
		1674
		1675	void
		1676	ev_stat_start (EV_P_ ev_stat *w)
		1677	{
		1678	if (expect_false (ev_is_active (w)))
		1679	return;
		1680
		1681	/* since we use memcmp, we need to clear any padding data etc. */
		1682	memset (&w->prev, 0, sizeof (ev_statdata));
		1683	memset (&w->attr, 0, sizeof (ev_statdata));
		1684
		1685	ev_stat_stat (EV_A_ w);
		1686
		1687	if (w->interval < MIN_STAT_INTERVAL)
		1688	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		1689
		1690	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		1691	ev_set_priority (&w->timer, ev_priority (w));
		1692	ev_timer_start (EV_A_ &w->timer);
		1693
		1694	ev_start (EV_A_ (W)w, 1);
		1695	}
		1696
		1697	void
		1698	ev_stat_stop (EV_P_ ev_stat *w)
		1699	{
		1700	ev_clear_pending (EV_A_ (W)w);
		1701	if (expect_false (!ev_is_active (w)))
		1702	return;
		1703
		1704	ev_timer_stop (EV_A_ &w->timer);
		1705
		1706	ev_stop (EV_A_ (W)w);
		1707	}
		1708	#endif
		1709
		1710	void
972	ev_idle_start (struct ev_idle *w)	1711	ev_idle_start (EV_P_ ev_idle *w)
973	{	1712	{
974	if (ev_is_active (w))	1713	if (expect_false (ev_is_active (w)))
975	return;	1714	return;
976		1715
977	ev_start ((W)w, ++idlecnt);	1716	ev_start (EV_A_ (W)w, ++idlecnt);
978	array_needsize (idles, idlemax, idlecnt, );	1717	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
979	idles [idlecnt - 1] = w;	1718	idles [idlecnt - 1] = w;
980	}	1719	}
981		1720
982	void	1721	void
983	ev_idle_stop (struct ev_idle *w)	1722	ev_idle_stop (EV_P_ ev_idle *w)
984	{	1723	{
985	ev_clear_pending ((W)w);	1724	ev_clear_pending (EV_A_ (W)w);
986	if (ev_is_active (w))	1725	if (expect_false (!ev_is_active (w)))
987	return;	1726	return;
988		1727
		1728	{
		1729	int active = ((W)w)->active;
989	idles [w->active - 1] = idles [--idlecnt];	1730	idles [active - 1] = idles [--idlecnt];
		1731	((W)idles [active - 1])->active = active;
		1732	}
		1733
990	ev_stop ((W)w);	1734	ev_stop (EV_A_ (W)w);
991	}	1735	}
992		1736
993	void	1737	void
994	ev_prepare_start (struct ev_prepare *w)	1738	ev_prepare_start (EV_P_ ev_prepare *w)
995	{	1739	{
996	if (ev_is_active (w))	1740	if (expect_false (ev_is_active (w)))
997	return;	1741	return;
998		1742
999	ev_start ((W)w, ++preparecnt);	1743	ev_start (EV_A_ (W)w, ++preparecnt);
1000	array_needsize (prepares, preparemax, preparecnt, );	1744	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1001	prepares [preparecnt - 1] = w;	1745	prepares [preparecnt - 1] = w;
1002	}	1746	}
1003		1747
1004	void	1748	void
1005	ev_prepare_stop (struct ev_prepare *w)	1749	ev_prepare_stop (EV_P_ ev_prepare *w)
1006	{	1750	{
1007	ev_clear_pending ((W)w);	1751	ev_clear_pending (EV_A_ (W)w);
1008	if (ev_is_active (w))	1752	if (expect_false (!ev_is_active (w)))
1009	return;	1753	return;
1010		1754
		1755	{
		1756	int active = ((W)w)->active;
1011	prepares [w->active - 1] = prepares [--preparecnt];	1757	prepares [active - 1] = prepares [--preparecnt];
		1758	((W)prepares [active - 1])->active = active;
		1759	}
		1760
1012	ev_stop ((W)w);	1761	ev_stop (EV_A_ (W)w);
1013	}	1762	}
1014		1763
1015	void	1764	void
1016	ev_check_start (struct ev_check *w)	1765	ev_check_start (EV_P_ ev_check *w)
1017	{	1766	{
1018	if (ev_is_active (w))	1767	if (expect_false (ev_is_active (w)))
1019	return;	1768	return;
1020		1769
1021	ev_start ((W)w, ++checkcnt);	1770	ev_start (EV_A_ (W)w, ++checkcnt);
1022	array_needsize (checks, checkmax, checkcnt, );	1771	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1023	checks [checkcnt - 1] = w;	1772	checks [checkcnt - 1] = w;
1024	}	1773	}
1025		1774
1026	void	1775	void
1027	ev_check_stop (struct ev_check *w)	1776	ev_check_stop (EV_P_ ev_check *w)
1028	{	1777	{
1029	ev_clear_pending ((W)w);	1778	ev_clear_pending (EV_A_ (W)w);
1030	if (ev_is_active (w))	1779	if (expect_false (!ev_is_active (w)))
1031	return;	1780	return;
1032		1781
		1782	{
		1783	int active = ((W)w)->active;
1033	checks [w->active - 1] = checks [--checkcnt];	1784	checks [active - 1] = checks [--checkcnt];
		1785	((W)checks [active - 1])->active = active;
		1786	}
		1787
1034	ev_stop ((W)w);	1788	ev_stop (EV_A_ (W)w);
1035	}	1789	}
1036		1790
1037	void	1791	#if EV_EMBED_ENABLE
1038	ev_child_start (struct ev_child *w)	1792	void noinline
		1793	ev_embed_sweep (EV_P_ ev_embed *w)
1039	{	1794	{
		1795	ev_loop (w->loop, EVLOOP_NONBLOCK);
		1796	}
		1797
		1798	static void
		1799	embed_cb (EV_P_ ev_io *io, int revents)
		1800	{
		1801	ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
		1802
1040	if (ev_is_active (w))	1803	if (ev_cb (w))
1041	return;	1804	ev_feed_event (EV_A_ (W)w, EV_EMBED);
		1805	else
		1806	ev_embed_sweep (loop, w);
		1807	}
1042		1808
		1809	void
		1810	ev_embed_start (EV_P_ ev_embed *w)
		1811	{
		1812	if (expect_false (ev_is_active (w)))
		1813	return;
		1814
		1815	{
		1816	struct ev_loop *loop = w->loop;
		1817	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
		1818	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
		1819	}
		1820
		1821	ev_set_priority (&w->io, ev_priority (w));
		1822	ev_io_start (EV_A_ &w->io);
		1823
1043	ev_start ((W)w, 1);	1824	ev_start (EV_A_ (W)w, 1);
1044	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1045	}	1825	}
1046		1826
1047	void	1827	void
1048	ev_child_stop (struct ev_child *w)	1828	ev_embed_stop (EV_P_ ev_embed *w)
1049	{	1829	{
1050	ev_clear_pending ((W)w);	1830	ev_clear_pending (EV_A_ (W)w);
1051	if (ev_is_active (w))	1831	if (expect_false (!ev_is_active (w)))
1052	return;	1832	return;
1053		1833
1054	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1834	ev_io_stop (EV_A_ &w->io);
		1835
1055	ev_stop ((W)w);	1836	ev_stop (EV_A_ (W)w);
1056	}	1837	}
		1838	#endif
		1839
		1840	#if EV_FORK_ENABLE
		1841	void
		1842	ev_fork_start (EV_P_ ev_fork *w)
		1843	{
		1844	if (expect_false (ev_is_active (w)))
		1845	return;
		1846
		1847	ev_start (EV_A_ (W)w, ++forkcnt);
		1848	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		1849	forks [forkcnt - 1] = w;
		1850	}
		1851
		1852	void
		1853	ev_fork_stop (EV_P_ ev_fork *w)
		1854	{
		1855	ev_clear_pending (EV_A_ (W)w);
		1856	if (expect_false (!ev_is_active (w)))
		1857	return;
		1858
		1859	{
		1860	int active = ((W)w)->active;
		1861	forks [active - 1] = forks [--forkcnt];
		1862	((W)forks [active - 1])->active = active;
		1863	}
		1864
		1865	ev_stop (EV_A_ (W)w);
		1866	}
		1867	#endif
1057		1868
1058	/*****************************************************************************/	1869	/*****************************************************************************/
1059		1870
1060	struct ev_once	1871	struct ev_once
1061	{	1872	{
1062	struct ev_io io;	1873	ev_io io;
1063	struct ev_timer to;	1874	ev_timer to;
1064	void (*cb)(int revents, void *arg);	1875	void (*cb)(int revents, void *arg);
1065	void *arg;	1876	void *arg;
1066	};	1877	};
1067		1878
1068	static void	1879	static void
1069	once_cb (struct ev_once *once, int revents)	1880	once_cb (EV_P_ struct ev_once *once, int revents)
1070	{	1881	{
1071	void (*cb)(int revents, void *arg) = once->cb;	1882	void (*cb)(int revents, void *arg) = once->cb;
1072	void *arg = once->arg;	1883	void *arg = once->arg;
1073		1884
1074	ev_io_stop (&once->io);	1885	ev_io_stop (EV_A_ &once->io);
1075	ev_timer_stop (&once->to);	1886	ev_timer_stop (EV_A_ &once->to);
1076	free (once);	1887	ev_free (once);
1077		1888
1078	cb (revents, arg);	1889	cb (revents, arg);
1079	}	1890	}
1080		1891
1081	static void	1892	static void
1082	once_cb_io (struct ev_io *w, int revents)	1893	once_cb_io (EV_P_ ev_io *w, int revents)
1083	{	1894	{
1084	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1895	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1085	}	1896	}
1086		1897
1087	static void	1898	static void
1088	once_cb_to (struct ev_timer *w, int revents)	1899	once_cb_to (EV_P_ ev_timer *w, int revents)
1089	{	1900	{
1090	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1901	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1091	}	1902	}
1092		1903
1093	void	1904	void
1094	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1905	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1095	{	1906	{
1096	struct ev_once *once = malloc (sizeof (struct ev_once));	1907	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1097		1908
1098	if (!once)	1909	if (expect_false (!once))
		1910	{
1099	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1911	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1100	else	1912	return;
1101	{	1913	}
		1914
1102	once->cb = cb;	1915	once->cb = cb;
1103	once->arg = arg;	1916	once->arg = arg;
1104		1917
1105	ev_watcher_init (&once->io, once_cb_io);	1918	ev_init (&once->io, once_cb_io);
1106	if (fd >= 0)	1919	if (fd >= 0)
1107	{	1920	{
1108	ev_io_set (&once->io, fd, events);	1921	ev_io_set (&once->io, fd, events);
1109	ev_io_start (&once->io);	1922	ev_io_start (EV_A_ &once->io);
1110	}	1923	}
1111		1924
1112	ev_watcher_init (&once->to, once_cb_to);	1925	ev_init (&once->to, once_cb_to);
1113	if (timeout >= 0.)	1926	if (timeout >= 0.)
1114	{	1927	{
1115	ev_timer_set (&once->to, timeout, 0.);	1928	ev_timer_set (&once->to, timeout, 0.);
1116	ev_timer_start (&once->to);	1929	ev_timer_start (EV_A_ &once->to);
1117	}
1118	}
1119	}
1120
1121	/*****************************************************************************/
1122
1123	#if 0
1124
1125	struct ev_io wio;
1126
1127	static void
1128	sin_cb (struct ev_io *w, int revents)
1129	{
1130	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1131	}
1132
1133	static void
1134	ocb (struct ev_timer *w, int revents)
1135	{
1136	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1137	ev_timer_stop (w);
1138	ev_timer_start (w);
1139	}
1140
1141	static void
1142	scb (struct ev_signal *w, int revents)
1143	{
1144	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1145	ev_io_stop (&wio);
1146	ev_io_start (&wio);
1147	}
1148
1149	static void
1150	gcb (struct ev_signal *w, int revents)
1151	{
1152	fprintf (stderr, "generic %x\n", revents);
1153
1154	}
1155
1156	int main (void)
1157	{
1158	ev_init (0);
1159
1160	ev_io_init (&wio, sin_cb, 0, EV_READ);
1161	ev_io_start (&wio);
1162
1163	struct ev_timer t[10000];
1164
1165	#if 0
1166	int i;
1167	for (i = 0; i < 10000; ++i)
1168	{	1930	}
1169	struct ev_timer *w = t + i;
1170	ev_watcher_init (w, ocb, i);
1171	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1172	ev_timer_start (w);
1173	if (drand48 () < 0.5)
1174	ev_timer_stop (w);
1175	}
1176	#endif
1177
1178	struct ev_timer t1;
1179	ev_timer_init (&t1, ocb, 5, 10);
1180	ev_timer_start (&t1);
1181
1182	struct ev_signal sig;
1183	ev_signal_init (&sig, scb, SIGQUIT);
1184	ev_signal_start (&sig);
1185
1186	struct ev_check cw;
1187	ev_check_init (&cw, gcb);
1188	ev_check_start (&cw);
1189
1190	struct ev_idle iw;
1191	ev_idle_init (&iw, gcb);
1192	ev_idle_start (&iw);
1193
1194	ev_loop (0);
1195
1196	return 0;
1197	}	1931	}
1198		1932
		1933	#ifdef __cplusplus
		1934	}
1199	#endif	1935	#endif
1200		1936
1201
1202
1203

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