libev/ev.h

/*
 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *
 *     * Redistributions in binary form must reproduce the above
 *       copyright notice, this list of conditions and the following
 *       disclaimer in the documentation and/or other materials provided
 *       with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef EV_H
#define EV_H

#ifdef __cplusplus
extern "C" {
#endif

typedef double ev_tstamp;

/* these priorities are inclusive, higher priorities will be called earlier */
#ifndef EV_MINPRI
# define EV_MINPRI -2
#endif
#ifndef EV_MAXPRI
# define EV_MAXPRI +2
#endif

/* support multiple event loops? */
#ifdef EV_MULTIPLICITY
struct ev_loop;
# define EV_P struct ev_loop *loop
# define EV_P_ EV_P,
# define EV_A loop
# define EV_A_ EV_A,
#else
# define EV_P void
# define EV_P_
# define EV_A
# define EV_A_

#endif

/* eventmask, revents, events... */
#define EV_UNDEF          -1 /* guaranteed to be invalid */
#define EV_NONE         0x00
#define EV_READ         0x01
#define EV_WRITE        0x02
#define EV_TIMEOUT  0x000100
#define EV_PERIODIC 0x000200
#define EV_SIGNAL   0x000400
#define EV_IDLE     0x000800
#define EV_CHECK    0x001000
#define EV_PREPARE  0x002000
#define EV_CHILD    0x004000
#define EV_ERROR    0x800000 /* sent when an error occurs */

/* can be used to add custom fields to all watchers */
#ifndef EV_COMMON
# define EV_COMMON void *data
#endif
#ifndef EV_PROTOTYPES
# define EV_PROTOTYPES 1
#endif

#define EV_VERSION_MAJOR 1
#define EV_VERSION_MINOR 1

/*
 * struct member types:
 * private: you can look at them, but not change them, and they might not mean anything to you.
 * ro: can be read anytime, but only changed when the watcher isn't active
 * rw: can be read and modified anytime, even when the watcher is active
 */

/* shared by all watchers */
#define EV_WATCHER(type)                        \
  int active; /* private */                     \
  int pending; /* private */                    \
  int priority; /* ro */                        \
  EV_COMMON; /* rw */                           \
  void (*cb)(EV_P_ struct type *, int revents); /* rw */ /* gets invoked with an eventmask */

#define EV_WATCHER_LIST(type)                   \
  EV_WATCHER (type);                            \
  struct ev_watcher_list *next /* private */

#define EV_WATCHER_TIME(type)                   \
  EV_WATCHER (type);                            \
  ev_tstamp at     /* private */

/* base class, nothing to see here unless you subclass */
struct ev_watcher {
  EV_WATCHER (ev_watcher);
};

/* base class, nothing to see here unless you subclass */
struct ev_watcher_list {
  EV_WATCHER_LIST (ev_watcher_list);
};

/* base class, nothing to see here unless you subclass */
struct ev_watcher_time {
  EV_WATCHER_TIME (ev_watcher_time);
};

/* invoked after a specific time, repeatable (based on monotonic clock) */
/* revent EV_TIMEOUT */
struct ev_timer
{
  EV_WATCHER_TIME (ev_timer);

  ev_tstamp repeat; /* rw */
};

/* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */
/* revent EV_PERIODIC */
struct ev_periodic
{
  EV_WATCHER_TIME (ev_periodic);

  ev_tstamp interval; /* rw */
};

/* invoked when fd is either EV_READable or EV_WRITEable */
/* revent EV_READ, EV_WRITE */
struct ev_io
{
  EV_WATCHER_LIST (ev_io);

  int fd;     /* ro */
  int events; /* ro */
};

/* invoked when the given signal has been received */
/* revent EV_SIGNAL */
struct ev_signal
{
  EV_WATCHER_LIST (ev_signal);

  int signum; /* ro */
};

/* invoked when the nothing else needs to be done, keeps the process from blocking */
/* revent EV_IDLE */
struct ev_idle
{
  EV_WATCHER (ev_idle);
};

/* invoked for each run of the mainloop, just before the blocking call */
/* you can still change events in any way you like */
/* revent EV_PREPARE */
struct ev_prepare
{
  EV_WATCHER (ev_prepare);
};

/* invoked for each run of the mainloop, just after the blocking call */
/* revent EV_CHECK */
struct ev_check
{
  EV_WATCHER (ev_check);
};

/* invoked when sigchld is received and waitpid indicates the givne pid */
/* revent EV_CHILD */
/* does not support priorities */
struct ev_child
{
  EV_WATCHER_LIST (ev_child);

  int pid;     /* ro */
  int rpid;    /* rw, holds the received pid */
  int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */
};

#define EVMETHOD_AUTO     0 /* consults environment */
#define EVMETHOD_SELECT   1
#define EVMETHOD_POLL     2
#define EVMETHOD_EPOLL    4
#define EVMETHOD_KQUEUE   8
#define EVMETHOD_DEVPOLL 16 /* NYI */
#define EVMETHOD_PORT    32 /* NYI */
#define EVMETHOD_ANY     ~0 /* any method, do not consult env */
#if EV_PROTOTYPES
int ev_method (EV_P);
int ev_init (EV_P_ int methods); /* returns ev_method */
int ev_version_major (void);
int ev_version_minor (void);

/* these three calls are suitable for plugging into pthread_atfork */
void ev_fork_prepare (void);
void ev_fork_parent (void);
void ev_fork_child (void);

ev_tstamp ev_time (void);
#endif

#define EVLOOP_NONBLOCK 1 /* do not block/wait */
#define EVLOOP_ONESHOT  2 /* block *once* only */
#if EV_PROTOTYPES
void ev_loop (EV_P_ int flags);
void ev_unloop (EV_P_ int status); /* set to 1 to break out of event loop, set to 2 to break out of all event loops */

ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */

/*
 * ref/unref can be used to add or remove a refcount on the mainloop. every watcher
 * keeps one reference. if you have a long-runing watcher you never unregister that
 * should not keep ev_loop from running, unref() after starting, and ref() before stopping.
 */
void ev_ref   (EV_P);
void ev_unref (EV_P);

/* convinience function, wait for a single event, without registering an event watcher */
/* if timeout is < 0, do wait indefinitely */
void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg);
#endif

/* these may evaluate ev multiple times, and the other arguments at most once */
/* either use ev_watcher_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */
#define ev_watcher_init(ev,cb_)             do { (ev)->active = (ev)->pending = (ev)->priority = 0; (ev)->cb = (cb_); } while (0)

#define ev_io_set(ev,fd_,events_)           do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0)
#define ev_timer_set(ev,after_,repeat_)     do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0)
#define ev_periodic_set(ev,at_,interval_)   do { (ev)->at = (at_); (ev)->interval = (interval_); } while (0)
#define ev_signal_set(ev,signum_)           do { (ev)->signum = (signum_); } while (0)
#define ev_idle_set(ev)                     /* nop, yes, this is a serious in-joke */
#define ev_prepare_set(ev)                  /* nop, yes, this is a serious in-joke */
#define ev_check_set(ev)                    /* nop, yes, this is a serious in-joke */
#define ev_child_set(ev,pid_)               do { (ev)->pid = (pid_); } while (0)

#define ev_io_init(ev,cb,fd,events)         do { ev_watcher_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0)
#define ev_timer_init(ev,cb,after,repeat)   do { ev_watcher_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0)
#define ev_periodic_init(ev,cb,at,interval) do { ev_watcher_init ((ev), (cb)); ev_periodic_set ((ev),(at),(interval)); } while (0)
#define ev_signal_init(ev,cb,signum)        do { ev_watcher_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0)
#define ev_idle_init(ev,cb)                 do { ev_watcher_init ((ev), (cb)); ev_idle_set ((ev)); } while (0)
#define ev_prepare_init(ev,cb)              do { ev_watcher_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0)
#define ev_check_init(ev,cb)                do { ev_watcher_init ((ev), (cb)); ev_check_set ((ev)); } while (0)
#define ev_child_init(ev,cb,pid)            do { ev_watcher_init ((ev), (cb)); ev_child_set ((ev),(pid)); } while (0)

#define ev_is_active(ev)                    (0 + (ev)->active) /* true when the watcher has been started */
#define ev_set_priority(ev,pri)             (ev)->priority = pri

/* stopping (enabling, adding) a watcher does nothing if it is already running */
/* stopping (disabling, deleting) a watcher does nothing unless its already running */
#if EV_PROTOTYPES
void ev_io_start       (EV_P_ struct ev_io *w);
void ev_io_stop        (EV_P_ struct ev_io *w);

void ev_timer_start    (EV_P_ struct ev_timer *w);
void ev_timer_stop     (EV_P_ struct ev_timer *w);
void ev_timer_again    (EV_P_ struct ev_timer *w); /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */

void ev_periodic_start (EV_P_ struct ev_periodic *w);
void ev_periodic_stop  (EV_P_ struct ev_periodic *w);

void ev_signal_start   (EV_P_ struct ev_signal *w);
void ev_signal_stop    (EV_P_ struct ev_signal *w);

void ev_idle_start     (EV_P_ struct ev_idle *w);
void ev_idle_stop      (EV_P_ struct ev_idle *w);

void ev_prepare_start  (EV_P_ struct ev_prepare *w);
void ev_prepare_stop   (EV_P_ struct ev_prepare *w);

void ev_check_start    (EV_P_ struct ev_check *w);
void ev_check_stop     (EV_P_ struct ev_check *w);

void ev_child_start    (EV_P_ struct ev_child *w);
void ev_child_stop     (EV_P_ struct ev_child *w);
#endif

#ifdef __cplusplus
}
#endif

#endif

Revision:	1.28
Committed:	Sat Nov 3 22:10:39 2007 UTC (16 years, 6 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.27:	+14 -4 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.10	/*
2			* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3			* All rights reserved.
4			*
5			* Redistribution and use in source and binary forms, with or without
6			* modification, are permitted provided that the following conditions are
7			* met:
8			*
9			* * Redistributions of source code must retain the above copyright
10			* notice, this list of conditions and the following disclaimer.
11			*
12			* * Redistributions in binary form must reproduce the above
13			* copyright notice, this list of conditions and the following
14			* disclaimer in the documentation and/or other materials provided
15			* with the distribution.
16			*
17			* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18			* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19			* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20			* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21			* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22			* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23			* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24			* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25			* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26			* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27			* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28			*/
29
30	root	1.1	#ifndef EV_H
31			#define EV_H
32
33	root	1.19	#ifdef __cplusplus
34			extern "C" {
35			#endif
36
37	root	1.1	typedef double ev_tstamp;
38
39	root	1.21	/* these priorities are inclusive, higher priorities will be called earlier */
40			#ifndef EV_MINPRI
41			# define EV_MINPRI -2
42			#endif
43			#ifndef EV_MAXPRI
44			# define EV_MAXPRI +2
45			#endif
46
47	root	1.28	/* support multiple event loops? */
48			#ifdef EV_MULTIPLICITY
49			struct ev_loop;
50			# define EV_P struct ev_loop *loop
51			# define EV_P_ EV_P,
52			# define EV_A loop
53			# define EV_A_ EV_A,
54			#else
55			# define EV_P void
56			# define EV_P_
57			# define EV_A
58			# define EV_A_
59
60			#endif
61	root	1.27
62	root	1.1	/* eventmask, revents, events... */
63	root	1.17	#define EV_UNDEF -1 /* guaranteed to be invalid */
64			#define EV_NONE 0x00
65			#define EV_READ 0x01
66			#define EV_WRITE 0x02
67			#define EV_TIMEOUT 0x000100
68			#define EV_PERIODIC 0x000200
69			#define EV_SIGNAL 0x000400
70			#define EV_IDLE 0x000800
71			#define EV_CHECK 0x001000
72			#define EV_PREPARE 0x002000
73			#define EV_CHILD 0x004000
74			#define EV_ERROR 0x800000 /* sent when an error occurs */
75	root	1.1
76	root	1.6	/* can be used to add custom fields to all watchers */
77			#ifndef EV_COMMON
78			# define EV_COMMON void *data
79			#endif
80	root	1.9	#ifndef EV_PROTOTYPES
81			# define EV_PROTOTYPES 1
82			#endif
83	root	1.6
84	root	1.14	#define EV_VERSION_MAJOR 1
85			#define EV_VERSION_MINOR 1
86
87	root	1.6	/*
88			* struct member types:
89			* private: you can look at them, but not change them, and they might not mean anything to you.
90			* ro: can be read anytime, but only changed when the watcher isn't active
91			* rw: can be read and modified anytime, even when the watcher is active
92			*/
93
94	root	1.1	/* shared by all watchers */
95			#define EV_WATCHER(type) \
96			int active; /* private */ \
97			int pending; /* private */ \
98	root	1.21	int priority; /* ro */ \
99	root	1.6	EV_COMMON; /* rw */ \
100	root	1.27	void (cb)(EV_P_ struct type , int revents); /* rw / / gets invoked with an eventmask */
101	root	1.1
102			#define EV_WATCHER_LIST(type) \
103			EV_WATCHER (type); \
104	root	1.26	struct ev_watcher_list next / private */
105	root	1.1
106	root	1.6	#define EV_WATCHER_TIME(type) \
107			EV_WATCHER (type); \
108			ev_tstamp at /* private */
109
110	root	1.7	/* base class, nothing to see here unless you subclass */
111			struct ev_watcher {
112			EV_WATCHER (ev_watcher);
113			};
114
115			/* base class, nothing to see here unless you subclass */
116			struct ev_watcher_list {
117			EV_WATCHER_LIST (ev_watcher_list);
118			};
119
120			/* base class, nothing to see here unless you subclass */
121			struct ev_watcher_time {
122			EV_WATCHER_TIME (ev_watcher_time);
123			};
124
125	root	1.6	/* invoked after a specific time, repeatable (based on monotonic clock) */
126	root	1.17	/* revent EV_TIMEOUT */
127	root	1.1	struct ev_timer
128			{
129	root	1.6	EV_WATCHER_TIME (ev_timer);
130	root	1.1
131			ev_tstamp repeat; /* rw */
132	root	1.6	};
133
134			/* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */
135	root	1.17	/* revent EV_PERIODIC */
136	root	1.6	struct ev_periodic
137			{
138			EV_WATCHER_TIME (ev_periodic);
139
140			ev_tstamp interval; /* rw */
141	root	1.1	};
142
143	root	1.5	/* invoked when fd is either EV_READable or EV_WRITEable */
144	root	1.17	/* revent EV_READ, EV_WRITE */
145	root	1.1	struct ev_io
146			{
147			EV_WATCHER_LIST (ev_io);
148
149			int fd; /* ro */
150			int events; /* ro */
151			};
152
153	root	1.5	/* invoked when the given signal has been received */
154	root	1.17	/* revent EV_SIGNAL */
155	root	1.1	struct ev_signal
156			{
157			EV_WATCHER_LIST (ev_signal);
158
159			int signum; /* ro */
160			};
161
162	root	1.5	/* invoked when the nothing else needs to be done, keeps the process from blocking */
163	root	1.17	/* revent EV_IDLE */
164	root	1.5	struct ev_idle
165			{
166			EV_WATCHER (ev_idle);
167			};
168
169	root	1.11	/* invoked for each run of the mainloop, just before the blocking call */
170			/* you can still change events in any way you like */
171	root	1.17	/* revent EV_PREPARE */
172	root	1.11	struct ev_prepare
173			{
174			EV_WATCHER (ev_prepare);
175			};
176
177			/* invoked for each run of the mainloop, just after the blocking call */
178	root	1.17	/* revent EV_CHECK */
179	root	1.5	struct ev_check
180			{
181			EV_WATCHER (ev_check);
182			};
183
184	root	1.12	/* invoked when sigchld is received and waitpid indicates the givne pid */
185	root	1.17	/* revent EV_CHILD */
186	root	1.25	/* does not support priorities */
187	root	1.12	struct ev_child
188			{
189			EV_WATCHER_LIST (ev_child);
190
191	root	1.24	int pid; /* ro */
192			int rpid; /* rw, holds the received pid */
193			int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */
194	root	1.12	};
195
196	root	1.22	#define EVMETHOD_AUTO 0 /* consults environment */
197			#define EVMETHOD_SELECT 1
198			#define EVMETHOD_POLL 2
199			#define EVMETHOD_EPOLL 4
200			#define EVMETHOD_KQUEUE 8
201	root	1.23	#define EVMETHOD_DEVPOLL 16 /* NYI */
202			#define EVMETHOD_PORT 32 /* NYI */
203	root	1.22	#define EVMETHOD_ANY ~0 /* any method, do not consult env */
204	root	1.9	#if EV_PROTOTYPES
205	root	1.27	int ev_method (EV_P);
206			int ev_init (EV_P_ int methods); /* returns ev_method */
207	root	1.14	int ev_version_major (void);
208			int ev_version_minor (void);
209	root	1.1
210	root	1.5	/* these three calls are suitable for plugging into pthread_atfork */
211	root	1.18	void ev_fork_prepare (void);
212			void ev_fork_parent (void);
213			void ev_fork_child (void);
214	root	1.1
215			ev_tstamp ev_time (void);
216	root	1.9	#endif
217	root	1.1
218			#define EVLOOP_NONBLOCK 1 /* do not block/wait */
219			#define EVLOOP_ONESHOT 2 /* block once only */
220	root	1.9	#if EV_PROTOTYPES
221	root	1.27	void ev_loop (EV_P_ int flags);
222			void ev_unloop (EV_P_ int status); /* set to 1 to break out of event loop, set to 2 to break out of all event loops */
223
224			ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */
225
226			/*
227			* ref/unref can be used to add or remove a refcount on the mainloop. every watcher
228			* keeps one reference. if you have a long-runing watcher you never unregister that
229			* should not keep ev_loop from running, unref() after starting, and ref() before stopping.
230			*/
231			void ev_ref (EV_P);
232			void ev_unref (EV_P);
233	root	1.1
234	root	1.9	/* convinience function, wait for a single event, without registering an event watcher */
235			/* if timeout is < 0, do wait indefinitely */
236	root	1.27	void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg);
237	root	1.9	#endif
238
239	root	1.2	/* these may evaluate ev multiple times, and the other arguments at most once */
240	root	1.16	/* either use ev_watcher_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */
241	root	1.21	#define ev_watcher_init(ev,cb_) do { (ev)->active = (ev)->pending = (ev)->priority = 0; (ev)->cb = (cb_); } while (0)
242	root	1.3
243	root	1.16	#define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0)
244			#define ev_timer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0)
245			#define ev_periodic_set(ev,at_,interval_) do { (ev)->at = (at_); (ev)->interval = (interval_); } while (0)
246			#define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0)
247			#define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */
248			#define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */
249			#define ev_check_set(ev) /* nop, yes, this is a serious in-joke */
250			#define ev_child_set(ev,pid_) do { (ev)->pid = (pid_); } while (0)
251
252			#define ev_io_init(ev,cb,fd,events) do { ev_watcher_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0)
253			#define ev_timer_init(ev,cb,after,repeat) do { ev_watcher_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0)
254			#define ev_periodic_init(ev,cb,at,interval) do { ev_watcher_init ((ev), (cb)); ev_periodic_set ((ev),(at),(interval)); } while (0)
255			#define ev_signal_init(ev,cb,signum) do { ev_watcher_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0)
256			#define ev_idle_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_idle_set ((ev)); } while (0)
257			#define ev_prepare_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0)
258			#define ev_check_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_check_set ((ev)); } while (0)
259			#define ev_child_init(ev,cb,pid) do { ev_watcher_init ((ev), (cb)); ev_child_set ((ev),(pid)); } while (0)
260	root	1.1
261	root	1.21	#define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */
262			#define ev_set_priority(ev,pri) (ev)->priority = pri
263	root	1.1
264	root	1.5	/* stopping (enabling, adding) a watcher does nothing if it is already running */
265			/* stopping (disabling, deleting) a watcher does nothing unless its already running */
266	root	1.9	#if EV_PROTOTYPES
267	root	1.27	void ev_io_start (EV_P_ struct ev_io *w);
268			void ev_io_stop (EV_P_ struct ev_io *w);
269	root	1.6
270	root	1.27	void ev_timer_start (EV_P_ struct ev_timer *w);
271			void ev_timer_stop (EV_P_ struct ev_timer *w);
272			void ev_timer_again (EV_P_ struct ev_timer w); / stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */
273	root	1.1
274	root	1.27	void ev_periodic_start (EV_P_ struct ev_periodic *w);
275			void ev_periodic_stop (EV_P_ struct ev_periodic *w);
276	root	1.1
277	root	1.27	void ev_signal_start (EV_P_ struct ev_signal *w);
278			void ev_signal_stop (EV_P_ struct ev_signal *w);
279	root	1.1
280	root	1.27	void ev_idle_start (EV_P_ struct ev_idle *w);
281			void ev_idle_stop (EV_P_ struct ev_idle *w);
282	root	1.5
283	root	1.27	void ev_prepare_start (EV_P_ struct ev_prepare *w);
284			void ev_prepare_stop (EV_P_ struct ev_prepare *w);
285	root	1.11
286	root	1.27	void ev_check_start (EV_P_ struct ev_check *w);
287			void ev_check_stop (EV_P_ struct ev_check *w);
288	root	1.12
289	root	1.27	void ev_child_start (EV_P_ struct ev_child *w);
290			void ev_child_stop (EV_P_ struct ev_child *w);
291	root	1.9	#endif
292	root	1.5
293	root	1.19	#ifdef __cplusplus
294			}
295			#endif
296
297	root	1.1	#endif
298