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Comparing libev/ev.h (file contents):
Revision 1.13 by root, Wed Oct 31 20:10:17 2007 UTC vs.
Revision 1.37 by root, Tue Nov 6 00:52:33 2007 UTC

… …
28 */ 28 */
29 29
30#ifndef EV_H 30#ifndef EV_H
31#define EV_H 31#define EV_H
32 32
33#ifdef __cplusplus
34extern "C" {
35#endif
36
33typedef double ev_tstamp; 37typedef double ev_tstamp;
34 38
39/* 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#ifndef EV_MULTIPLICITY
48# define EV_MULTIPLICITY 1
49#endif
50
51/* support multiple event loops? */
52#if EV_MULTIPLICITY
53struct ev_loop;
54# define EV_P struct ev_loop *loop
55# define EV_P_ EV_P,
56# define EV_A loop
57# define EV_A_ EV_A,
58#else
59# define EV_P void
60# define EV_P_
61# define EV_A
62# define EV_A_
63#endif
64
35/* eventmask, revents, events... */ 65/* eventmask, revents, events... */
36#define EV_UNDEF -1 /* guaranteed to be invalid */ 66#define EV_UNDEF -1 /* guaranteed to be invalid */
37#define EV_NONE 0x00 67#define EV_NONE 0x00
38#define EV_READ 0x01 68#define EV_READ 0x01
39#define EV_WRITE 0x02 69#define EV_WRITE 0x02
40#define EV_TIMEOUT 0x04 70#define EV_TIMEOUT 0x000100
71#define EV_PERIODIC 0x000200
41#define EV_SIGNAL 0x08 72#define EV_SIGNAL 0x000400
42#define EV_IDLE 0x10 73#define EV_IDLE 0x000800
43#define EV_CHECK 0x20 74#define EV_CHECK 0x001000
44#define EV_PREPARE 0x40 75#define EV_PREPARE 0x002000
45#define EV_CHILD 0x80 76#define EV_CHILD 0x004000
46#define EV_ERROR (0xff|0x8000) 77#define EV_ERROR 0x800000 /* sent when an error occurs */
47 78
48/* can be used to add custom fields to all watchers */ 79/* can be used to add custom fields to all watchers */
49#ifndef EV_COMMON 80#ifndef EV_COMMON
50# define EV_COMMON void *data 81# define EV_COMMON void *data
51#endif 82#endif
52#ifndef EV_PROTOTYPES 83#ifndef EV_PROTOTYPES
53# define EV_PROTOTYPES 1 84# define EV_PROTOTYPES 1
54#endif 85#endif
86
87#define EV_VERSION_MAJOR 1
88#define EV_VERSION_MINOR 1
55 89
56/* 90/*
57 * struct member types: 91 * struct member types:
58 * private: you can look at them, but not change them, and they might not mean anything to you. 92 * private: you can look at them, but not change them, and they might not mean anything to you.
59 * ro: can be read anytime, but only changed when the watcher isn't active 93 * ro: can be read anytime, but only changed when the watcher isn't active
… …
62 96
63/* shared by all watchers */ 97/* shared by all watchers */
64#define EV_WATCHER(type) \ 98#define EV_WATCHER(type) \
65 int active; /* private */ \ 99 int active; /* private */ \
66 int pending; /* private */ \ 100 int pending; /* private */ \
101 int priority; /* private */ \
67 EV_COMMON; /* rw */ \ 102 EV_COMMON; /* rw */ \
68 void (*cb)(struct type *, int revents); /* rw */ /* gets invoked with an eventmask */ 103 void (*cb)(EV_P_ struct type *, int revents); /* private */ /* gets invoked with an eventmask */
69 104
70#define EV_WATCHER_LIST(type) \ 105#define EV_WATCHER_LIST(type) \
71 EV_WATCHER (type); \ 106 EV_WATCHER (type); \
72 struct type *next /* private */ 107 struct ev_watcher_list *next /* private */
73 108
74#define EV_WATCHER_TIME(type) \ 109#define EV_WATCHER_TIME(type) \
75 EV_WATCHER (type); \ 110 EV_WATCHER (type); \
76 ev_tstamp at /* private */ 111 ev_tstamp at /* private */
77 112
… …
89struct ev_watcher_time { 124struct ev_watcher_time {
90 EV_WATCHER_TIME (ev_watcher_time); 125 EV_WATCHER_TIME (ev_watcher_time);
91}; 126};
92 127
93/* invoked after a specific time, repeatable (based on monotonic clock) */ 128/* invoked after a specific time, repeatable (based on monotonic clock) */
129/* revent EV_TIMEOUT */
94struct ev_timer 130struct ev_timer
95{ 131{
96 EV_WATCHER_TIME (ev_timer); 132 EV_WATCHER_TIME (ev_timer);
97 133
98 ev_tstamp repeat; /* rw */ 134 ev_tstamp repeat; /* rw */
99}; 135};
100 136
101/* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */ 137/* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */
138/* revent EV_PERIODIC */
102struct ev_periodic 139struct ev_periodic
103{ 140{
104 EV_WATCHER_TIME (ev_periodic); 141 EV_WATCHER_TIME (ev_periodic);
105 142
106 ev_tstamp interval; /* rw */ 143 ev_tstamp interval; /* rw */
107}; 144};
108 145
109/* invoked when fd is either EV_READable or EV_WRITEable */ 146/* invoked when fd is either EV_READable or EV_WRITEable */
147/* revent EV_READ, EV_WRITE */
110struct ev_io 148struct ev_io
111{ 149{
112 EV_WATCHER_LIST (ev_io); 150 EV_WATCHER_LIST (ev_io);
113 151
114 int fd; /* ro */ 152 int fd; /* ro */
115 int events; /* ro */ 153 int events; /* ro */
116}; 154};
117 155
118/* invoked when the given signal has been received */ 156/* invoked when the given signal has been received */
157/* revent EV_SIGNAL */
119struct ev_signal 158struct ev_signal
120{ 159{
121 EV_WATCHER_LIST (ev_signal); 160 EV_WATCHER_LIST (ev_signal);
161#if EV_MULTIPLICITY
162 struct ev_loop *loop;
163#endif
122 164
123 int signum; /* ro */ 165 int signum; /* ro */
124}; 166};
125 167
126/* invoked when the nothing else needs to be done, keeps the process from blocking */ 168/* invoked when the nothing else needs to be done, keeps the process from blocking */
169/* revent EV_IDLE */
127struct ev_idle 170struct ev_idle
128{ 171{
129 EV_WATCHER (ev_idle); 172 EV_WATCHER (ev_idle);
130}; 173};
131 174
132/* invoked for each run of the mainloop, just before the blocking call */ 175/* invoked for each run of the mainloop, just before the blocking call */
133/* you can still change events in any way you like */ 176/* you can still change events in any way you like */
177/* revent EV_PREPARE */
134struct ev_prepare 178struct ev_prepare
135{ 179{
136 EV_WATCHER (ev_prepare); 180 EV_WATCHER (ev_prepare);
137}; 181};
138 182
139/* invoked for each run of the mainloop, just after the blocking call */ 183/* invoked for each run of the mainloop, just after the blocking call */
184/* revent EV_CHECK */
140struct ev_check 185struct ev_check
141{ 186{
142 EV_WATCHER (ev_check); 187 EV_WATCHER (ev_check);
143}; 188};
144 189
145/* invoked when sigchld is received and waitpid indicates the givne pid */ 190/* invoked when sigchld is received and waitpid indicates the givne pid */
191/* revent EV_CHILD */
192/* does not support priorities */
146struct ev_child 193struct ev_child
147{ 194{
148 EV_WATCHER_LIST (ev_child); 195 EV_WATCHER_LIST (ev_child);
149 196
150 int pid; /* ro */ 197 int pid; /* ro */
198 int rpid; /* rw, holds the received pid */
151 int status; /* rw, holds the exit status, use the macros from sys/wait.h */ 199 int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */
152}; 200};
153 201
154#define EVMETHOD_NONE 0 202union ev_any_watcher
203{
204 struct ev_watcher w;
205 struct ev_watcher_list wl;
206 struct ev_io io;
207 struct ev_timer timer;
208 struct ev_periodic periodic;
209 struct ev_signal signal;
210 struct ev_idle idle;
211 struct ev_child child;
212 struct ev_prepare prepare;
213 struct ev_check check;
214};
215
216#define EVMETHOD_AUTO 0 /* consults environment */
155#define EVMETHOD_SELECT 1 217#define EVMETHOD_SELECT 1
156#define EVMETHOD_EPOLL 2 218#define EVMETHOD_POLL 2
219#define EVMETHOD_EPOLL 4
220#define EVMETHOD_KQUEUE 8
221#define EVMETHOD_DEVPOLL 16 /* NYI */
222#define EVMETHOD_PORT 32 /* NYI */
223#define EVMETHOD_WIN32 64 /* NYI */
224#define EVMETHOD_ANY ~0 /* any method, do not consult env */
225
157#if EV_PROTOTYPES 226#if EV_PROTOTYPES
158extern int ev_method; 227int ev_version_major (void);
159int ev_init (int flags); /* returns ev_method */ 228int ev_version_minor (void);
160 229
161/* these three calls are suitable for plugging into pthread_atfork */
162void ev_prefork (void);
163void ev_postfork_parent (void);
164void ev_postfork_child (void);
165
166extern ev_tstamp ev_now; /* time w.r.t. timers and the eventloop, updated after each poll */
167ev_tstamp ev_time (void); 230ev_tstamp ev_time (void);
231
232/* Sets the allocation function to use, works like realloc.
233 * It is used to allocate and free memory.
234 * If it returns zero when memory needs to be allocated, the library might abort
235 * or take some potentially destructive action.
236 * The default is your system realloc function.
237 */
238void ev_set_allocator (void *(*cb)(void *ptr, long size));
239
240/* set the callback function to call on a
241 * retryable syscall error
242 * (such as failed select, poll, epoll_wait)
243 */
244void ev_set_syserr_cb (void (*cb)(const char *msg));
245
246# if EV_MULTIPLICITY
247/* the default loop is the only one that handles signals and child watchers */
248/* you can call this as often as you like */
249struct ev_loop *ev_default_loop (int methods); /* returns default loop */
250
251/* create and destroy alternative loops that don't handle signals */
252struct ev_loop *ev_loop_new (int methods);
253void ev_loop_destroy (EV_P);
254void ev_loop_fork (EV_P);
255# else
256int ev_default_loop (int methods); /* returns true when successful */
257# endif
258
259void ev_default_destroy (void); /* destroy the default loop */
260/* this needs to be called after fork, to duplicate the default loop */
261/* if you create alternative loops you have to call ev_loop_fork on them */
262/* you can call it in either the parent or the child */
263/* you can actually call it at any time, anywhere :) */
264void ev_default_fork (void);
265
266int ev_method (EV_P);
168#endif 267#endif
169 268
170#define EVLOOP_NONBLOCK 1 /* do not block/wait */ 269#define EVLOOP_NONBLOCK 1 /* do not block/wait */
171#define EVLOOP_ONESHOT 2 /* block *once* only */ 270#define EVLOOP_ONESHOT 2 /* block *once* only */
271#define EVUNLOOP_ONCE 1 /* unloop once */
272#define EVUNLOOP_ALL 2 /* unloop all loops */
273
172#if EV_PROTOTYPES 274#if EV_PROTOTYPES
173void ev_loop (int flags); 275void ev_loop (EV_P_ int flags);
174extern int ev_loop_done; /* set to 1 to break out of event loop, set to 2 to break out of all event loops */ 276void ev_unloop (EV_P_ int how); /* set to 1 to break out of event loop, set to 2 to break out of all event loops */
277
278ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */
279
280/*
281 * ref/unref can be used to add or remove a refcount on the mainloop. every watcher
282 * keeps one reference. if you have a long-runing watcher you never unregister that
283 * should not keep ev_loop from running, unref() after starting, and ref() before stopping.
284 */
285void ev_ref (EV_P);
286void ev_unref (EV_P);
175 287
176/* convinience function, wait for a single event, without registering an event watcher */ 288/* convinience function, wait for a single event, without registering an event watcher */
177/* if timeout is < 0, do wait indefinitely */ 289/* if timeout is < 0, do wait indefinitely */
178void ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); 290void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg);
179#endif 291#endif
180 292
181/* these may evaluate ev multiple times, and the other arguments at most once */ 293/* these may evaluate ev multiple times, and the other arguments at most once */
182/* either use evw_init + evXXX_set, or the evXXX_init macro, below, to first initialise a watcher */ 294/* either use ev_watcher_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */
183#define evw_init(ev,cb_) do { (ev)->active = 0; (ev)->pending = 0; (ev)->cb = (cb_); } while (0) 295#define ev_watcher_init(ev,cb_) do { \
296 ((struct ev_watcher *)(void *)(ev))->active = \
297 ((struct ev_watcher *)(void *)(ev))->pending = \
298 ((struct ev_watcher *)(void *)(ev))->priority = 0; \
299 (ev)->cb = (cb_); \
300} while (0)
184 301
185#define evio_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) 302#define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0)
186#define evtimer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0) 303#define ev_timer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0)
187#define evperiodic_set(ev,at_,interval_) do { (ev)->at = (at_); (ev)->interval = (interval_); } while (0) 304#define ev_periodic_set(ev,at_,interval_) do { (ev)->at = (at_); (ev)->interval = (interval_); } while (0)
188#define evsignal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) 305#define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0)
189#define evidle_set(ev) /* nop, yes, this is a serious in-joke */ 306#define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */
190#define evprepare_set(ev) /* nop, yes, this is a serious in-joke */ 307#define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */
191#define evcheck_set(ev) /* nop, yes, this is a serious in-joke */ 308#define ev_check_set(ev) /* nop, yes, this is a serious in-joke */
192#define evchild_set(ev,pid_) do { (ev)->pid = (pid_); } while (0) 309#define ev_child_set(ev,pid_) do { (ev)->pid = (pid_); } while (0)
193 310
194#define evio_init(ev,cb,fd,events) do { evw_init ((ev), (cb)); evio_set ((ev),(fd),(events)); } while (0) 311#define ev_io_init(ev,cb,fd,events) do { ev_watcher_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0)
195#define evtimer_init(ev,cb,after,repeat) do { evw_init ((ev), (cb)); evtimer_set ((ev),(after),(repeat)); } while (0) 312#define ev_timer_init(ev,cb,after,repeat) do { ev_watcher_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0)
196#define evperiodic_init(ev,cb,at,interval) do { evw_init ((ev), (cb)); evperiodic_set ((ev),(at),(interval)); } while (0) 313#define ev_periodic_init(ev,cb,at,interval) do { ev_watcher_init ((ev), (cb)); ev_periodic_set ((ev),(at),(interval)); } while (0)
197#define evsignal_init(ev,cb,signum) do { evw_init ((ev), (cb)); evsignal_set ((ev), (signum)); } while (0) 314#define ev_signal_init(ev,cb,signum) do { ev_watcher_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0)
198#define evidle_init(ev,cb) do { evw_init ((ev), (cb)); evidle_set ((ev)); } while (0) 315#define ev_idle_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_idle_set ((ev)); } while (0)
199#define evprepare_init(ev,cb) do { evw_init ((ev), (cb)); evprepare_set ((ev)); } while (0) 316#define ev_prepare_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0)
200#define evcheck_init(ev,cb) do { evw_init ((ev), (cb)); evcheck_set ((ev)); } while (0) 317#define ev_check_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_check_set ((ev)); } while (0)
201#define evchild_init(ev,cb,pid) do { evw_init ((ev), (cb)); evchild_set ((ev),(pid)); } while (0) 318#define ev_child_init(ev,cb,pid) do { ev_watcher_init ((ev), (cb)); ev_child_set ((ev),(pid)); } while (0)
202 319
320#define ev_is_pending(ev) (0 + ((struct ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */
203#define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */ 321#define ev_is_active(ev) (0 + ((struct ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */
322
323#define ev_priority(ev) ((struct ev_watcher *)(void *)(ev))->priority /* rw */
324#define ev_cb(ev) (ev)->cb /* rw */
325#define ev_set_priority(ev,pri) ev_priority (ev) = (pri)
326#define ev_set_cb(ev,cb_) ev_cb (ev) = (cb_)
204 327
205/* stopping (enabling, adding) a watcher does nothing if it is already running */ 328/* stopping (enabling, adding) a watcher does nothing if it is already running */
206/* stopping (disabling, deleting) a watcher does nothing unless its already running */ 329/* stopping (disabling, deleting) a watcher does nothing unless its already running */
207#if EV_PROTOTYPES 330#if EV_PROTOTYPES
208void evio_start (struct ev_io *w); 331void ev_io_start (EV_P_ struct ev_io *w);
209void evio_stop (struct ev_io *w); 332void ev_io_stop (EV_P_ struct ev_io *w);
210 333
211void evtimer_start (struct ev_timer *w); 334void ev_timer_start (EV_P_ struct ev_timer *w);
212void evtimer_stop (struct ev_timer *w); 335void ev_timer_stop (EV_P_ struct ev_timer *w);
213void evtimer_again (struct ev_timer *w); /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ 336/* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */
337void ev_timer_again (EV_P_ struct ev_timer *w);
214 338
215void evperiodic_start (struct ev_periodic *w); 339void ev_periodic_start (EV_P_ struct ev_periodic *w);
216void evperiodic_stop (struct ev_periodic *w); 340void ev_periodic_stop (EV_P_ struct ev_periodic *w);
217 341
218void evsignal_start (struct ev_signal *w);
219void evsignal_stop (struct ev_signal *w);
220
221void evidle_start (struct ev_idle *w); 342void ev_idle_start (EV_P_ struct ev_idle *w);
222void evidle_stop (struct ev_idle *w); 343void ev_idle_stop (EV_P_ struct ev_idle *w);
223 344
224void evprepare_start (struct ev_prepare *w); 345void ev_prepare_start (EV_P_ struct ev_prepare *w);
225void evprepare_stop (struct ev_prepare *w); 346void ev_prepare_stop (EV_P_ struct ev_prepare *w);
226 347
227void evcheck_start (struct ev_check *w); 348void ev_check_start (EV_P_ struct ev_check *w);
228void evcheck_stop (struct ev_check *w); 349void ev_check_stop (EV_P_ struct ev_check *w);
229 350
351/* only supported in the default loop */
352void ev_signal_start (EV_P_ struct ev_signal *w);
353void ev_signal_stop (EV_P_ struct ev_signal *w);
354
355/* only supported in the default loop */
230void evchild_start (struct ev_child *w); 356void ev_child_start (EV_P_ struct ev_child *w);
231void evchild_stop (struct ev_child *w); 357void ev_child_stop (EV_P_ struct ev_child *w);
232#endif 358#endif
233 359
360#ifdef __cplusplus
361}
234#endif 362#endif
235 363
364#endif
365

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