ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libev/ev.h
(Generate patch)

Comparing libev/ev.h (file contents):
Revision 1.19 by root, Thu Nov 1 13:11:12 2007 UTC vs.
Revision 1.40 by root, Thu Nov 8 00:44:17 2007 UTC

… …
34extern "C" { 34extern "C" {
35#endif 35#endif
36 36
37typedef double ev_tstamp; 37typedef double ev_tstamp;
38 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
39/* eventmask, revents, events... */ 65/* eventmask, revents, events... */
40#define EV_UNDEF -1 /* guaranteed to be invalid */ 66#define EV_UNDEF -1 /* guaranteed to be invalid */
41#define EV_NONE 0x00 67#define EV_NONE 0x00
42#define EV_READ 0x01 68#define EV_READ 0x01
43#define EV_WRITE 0x02 69#define EV_WRITE 0x02
… …
70 96
71/* shared by all watchers */ 97/* shared by all watchers */
72#define EV_WATCHER(type) \ 98#define EV_WATCHER(type) \
73 int active; /* private */ \ 99 int active; /* private */ \
74 int pending; /* private */ \ 100 int pending; /* private */ \
101 int priority; /* private */ \
75 EV_COMMON; /* rw */ \ 102 EV_COMMON; /* rw */ \
76 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 */
77 104
78#define EV_WATCHER_LIST(type) \ 105#define EV_WATCHER_LIST(type) \
79 EV_WATCHER (type); \ 106 EV_WATCHER (type); \
80 struct type *next /* private */ 107 struct ev_watcher_list *next /* private */
81 108
82#define EV_WATCHER_TIME(type) \ 109#define EV_WATCHER_TIME(type) \
83 EV_WATCHER (type); \ 110 EV_WATCHER (type); \
84 ev_tstamp at /* private */ 111 ev_tstamp at /* private */
85 112
… …
112struct ev_periodic 139struct ev_periodic
113{ 140{
114 EV_WATCHER_TIME (ev_periodic); 141 EV_WATCHER_TIME (ev_periodic);
115 142
116 ev_tstamp interval; /* rw */ 143 ev_tstamp interval; /* rw */
144 ev_tstamp (*reschedule_cb)(struct ev_periodic *w, ev_tstamp now); /* rw */
117}; 145};
118 146
119/* invoked when fd is either EV_READable or EV_WRITEable */ 147/* invoked when fd is either EV_READable or EV_WRITEable */
120/* revent EV_READ, EV_WRITE */ 148/* revent EV_READ, EV_WRITE */
121struct ev_io 149struct ev_io
… …
157 EV_WATCHER (ev_check); 185 EV_WATCHER (ev_check);
158}; 186};
159 187
160/* invoked when sigchld is received and waitpid indicates the givne pid */ 188/* invoked when sigchld is received and waitpid indicates the givne pid */
161/* revent EV_CHILD */ 189/* revent EV_CHILD */
190/* does not support priorities */
162struct ev_child 191struct ev_child
163{ 192{
164 EV_WATCHER_LIST (ev_child); 193 EV_WATCHER_LIST (ev_child);
165 194
166 int pid; /* ro */ 195 int pid; /* ro */
196 int rpid; /* rw, holds the received pid */
167 int status; /* rw, holds the exit status, use the macros from sys/wait.h */ 197 int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */
168}; 198};
169 199
170#define EVMETHOD_NONE 0 200union ev_any_watcher
201{
202 struct ev_watcher w;
203 struct ev_watcher_list wl;
204 struct ev_io io;
205 struct ev_timer timer;
206 struct ev_periodic periodic;
207 struct ev_signal signal;
208 struct ev_idle idle;
209 struct ev_child child;
210 struct ev_prepare prepare;
211 struct ev_check check;
212};
213
214#define EVMETHOD_AUTO 0 /* consults environment */
171#define EVMETHOD_SELECT 1 215#define EVMETHOD_SELECT 1
172#define EVMETHOD_EPOLL 2 216#define EVMETHOD_POLL 2
217#define EVMETHOD_EPOLL 4
218#define EVMETHOD_KQUEUE 8
219#define EVMETHOD_DEVPOLL 16 /* NYI */
220#define EVMETHOD_PORT 32 /* NYI */
221#define EVMETHOD_WIN32 64 /* NYI */
222#define EVMETHOD_ANY ~0 /* any method, do not consult env */
223
173#if EV_PROTOTYPES 224#if EV_PROTOTYPES
174extern int ev_method;
175int ev_init (int flags); /* returns ev_method */
176int ev_version_major (void); 225int ev_version_major (void);
177int ev_version_minor (void); 226int ev_version_minor (void);
178 227
179/* these three calls are suitable for plugging into pthread_atfork */
180void ev_fork_prepare (void);
181void ev_fork_parent (void);
182void ev_fork_child (void);
183
184extern ev_tstamp ev_now; /* time w.r.t. timers and the eventloop, updated after each poll */
185ev_tstamp ev_time (void); 228ev_tstamp ev_time (void);
229
230/* Sets the allocation function to use, works like realloc.
231 * It is used to allocate and free memory.
232 * If it returns zero when memory needs to be allocated, the library might abort
233 * or take some potentially destructive action.
234 * The default is your system realloc function.
235 */
236void ev_set_allocator (void *(*cb)(void *ptr, long size));
237
238/* set the callback function to call on a
239 * retryable syscall error
240 * (such as failed select, poll, epoll_wait)
241 */
242void ev_set_syserr_cb (void (*cb)(const char *msg));
243
244# if EV_MULTIPLICITY
245/* the default loop is the only one that handles signals and child watchers */
246/* you can call this as often as you like */
247struct ev_loop *ev_default_loop (int methods); /* returns default loop */
248
249/* create and destroy alternative loops that don't handle signals */
250struct ev_loop *ev_loop_new (int methods);
251void ev_loop_destroy (EV_P);
252void ev_loop_fork (EV_P);
253# else
254int ev_default_loop (int methods); /* returns true when successful */
255# endif
256
257void ev_default_destroy (void); /* destroy the default loop */
258/* this needs to be called after fork, to duplicate the default loop */
259/* if you create alternative loops you have to call ev_loop_fork on them */
260/* you can call it in either the parent or the child */
261/* you can actually call it at any time, anywhere :) */
262void ev_default_fork (void);
263
264int ev_method (EV_P);
186#endif 265#endif
187 266
188#define EVLOOP_NONBLOCK 1 /* do not block/wait */ 267#define EVLOOP_NONBLOCK 1 /* do not block/wait */
189#define EVLOOP_ONESHOT 2 /* block *once* only */ 268#define EVLOOP_ONESHOT 2 /* block *once* only */
269#define EVUNLOOP_ONCE 1 /* unloop once */
270#define EVUNLOOP_ALL 2 /* unloop all loops */
271
190#if EV_PROTOTYPES 272#if EV_PROTOTYPES
191void ev_loop (int flags); 273void ev_loop (EV_P_ int flags);
192extern int ev_loop_done; /* set to 1 to break out of event loop, set to 2 to break out of all event loops */ 274void 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 */
275
276ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */
277
278/*
279 * ref/unref can be used to add or remove a refcount on the mainloop. every watcher
280 * keeps one reference. if you have a long-runing watcher you never unregister that
281 * should not keep ev_loop from running, unref() after starting, and ref() before stopping.
282 */
283void ev_ref (EV_P);
284void ev_unref (EV_P);
193 285
194/* convinience function, wait for a single event, without registering an event watcher */ 286/* convinience function, wait for a single event, without registering an event watcher */
195/* if timeout is < 0, do wait indefinitely */ 287/* if timeout is < 0, do wait indefinitely */
196void ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg); 288void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg);
197#endif 289#endif
198 290
199/* these may evaluate ev multiple times, and the other arguments at most once */ 291/* these may evaluate ev multiple times, and the other arguments at most once */
200/* either use ev_watcher_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */ 292/* either use ev_watcher_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */
201#define ev_watcher_init(ev,cb_) do { (ev)->active = 0; (ev)->pending = 0; (ev)->cb = (cb_); } while (0) 293#define ev_watcher_init(ev,cb_) do { \
294 ((struct ev_watcher *)(void *)(ev))->active = \
295 ((struct ev_watcher *)(void *)(ev))->pending = \
296 ((struct ev_watcher *)(void *)(ev))->priority = 0; \
297 (ev)->cb = (cb_); \
298} while (0)
202 299
203#define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) 300#define ev_io_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0)
204#define ev_timer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0) 301#define ev_timer_set(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0)
205#define ev_periodic_set(ev,at_,interval_) do { (ev)->at = (at_); (ev)->interval = (interval_); } while (0) 302#define ev_periodic_set(ev,at_,ival_,res_) do { (ev)->at = (at_); (ev)->interval = (ival_); (ev)->reschedule_cb= (res_); } while (0)
206#define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) 303#define ev_signal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0)
207#define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */ 304#define ev_idle_set(ev) /* nop, yes, this is a serious in-joke */
208#define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */ 305#define ev_prepare_set(ev) /* nop, yes, this is a serious in-joke */
209#define ev_check_set(ev) /* nop, yes, this is a serious in-joke */ 306#define ev_check_set(ev) /* nop, yes, this is a serious in-joke */
210#define ev_child_set(ev,pid_) do { (ev)->pid = (pid_); } while (0) 307#define ev_child_set(ev,pid_) do { (ev)->pid = (pid_); } while (0)
211 308
212#define ev_io_init(ev,cb,fd,events) do { ev_watcher_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0) 309#define ev_io_init(ev,cb,fd,events) do { ev_watcher_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0)
213#define ev_timer_init(ev,cb,after,repeat) do { ev_watcher_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0) 310#define ev_timer_init(ev,cb,after,repeat) do { ev_watcher_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0)
214#define ev_periodic_init(ev,cb,at,interval) do { ev_watcher_init ((ev), (cb)); ev_periodic_set ((ev),(at),(interval)); } while (0) 311#define ev_periodic_init(ev,cb,at,ival,res) do { ev_watcher_init ((ev), (cb)); ev_periodic_set ((ev),(at),(ival),(res)); } while (0)
215#define ev_signal_init(ev,cb,signum) do { ev_watcher_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0) 312#define ev_signal_init(ev,cb,signum) do { ev_watcher_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0)
216#define ev_idle_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_idle_set ((ev)); } while (0) 313#define ev_idle_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_idle_set ((ev)); } while (0)
217#define ev_prepare_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0) 314#define ev_prepare_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0)
218#define ev_check_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_check_set ((ev)); } while (0) 315#define ev_check_init(ev,cb) do { ev_watcher_init ((ev), (cb)); ev_check_set ((ev)); } while (0)
219#define ev_child_init(ev,cb,pid) do { ev_watcher_init ((ev), (cb)); ev_child_set ((ev),(pid)); } while (0) 316#define ev_child_init(ev,cb,pid) do { ev_watcher_init ((ev), (cb)); ev_child_set ((ev),(pid)); } while (0)
220 317
318#define ev_is_pending(ev) (0 + ((struct ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */
221#define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */ 319#define ev_is_active(ev) (0 + ((struct ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */
320
321#define ev_priority(ev) ((struct ev_watcher *)(void *)(ev))->priority /* rw */
322#define ev_cb(ev) (ev)->cb /* rw */
323#define ev_set_priority(ev,pri) ev_priority (ev) = (pri)
324#define ev_set_cb(ev,cb_) ev_cb (ev) = (cb_)
222 325
223/* stopping (enabling, adding) a watcher does nothing if it is already running */ 326/* stopping (enabling, adding) a watcher does nothing if it is already running */
224/* stopping (disabling, deleting) a watcher does nothing unless its already running */ 327/* stopping (disabling, deleting) a watcher does nothing unless its already running */
225#if EV_PROTOTYPES 328#if EV_PROTOTYPES
226void ev_io_start (struct ev_io *w); 329void ev_io_start (EV_P_ struct ev_io *w);
227void ev_io_stop (struct ev_io *w); 330void ev_io_stop (EV_P_ struct ev_io *w);
228 331
229void ev_timer_start (struct ev_timer *w); 332void ev_timer_start (EV_P_ struct ev_timer *w);
230void ev_timer_stop (struct ev_timer *w); 333void ev_timer_stop (EV_P_ struct ev_timer *w);
231void ev_timer_again (struct ev_timer *w); /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */ 334/* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */
335void ev_timer_again (EV_P_ struct ev_timer *w);
232 336
233void ev_periodic_start (struct ev_periodic *w); 337void ev_periodic_start (EV_P_ struct ev_periodic *w);
234void ev_periodic_stop (struct ev_periodic *w); 338void ev_periodic_stop (EV_P_ struct ev_periodic *w);
339void ev_periodic_again (EV_P_ struct ev_periodic *w);
235 340
236void ev_signal_start (struct ev_signal *w);
237void ev_signal_stop (struct ev_signal *w);
238
239void ev_idle_start (struct ev_idle *w); 341void ev_idle_start (EV_P_ struct ev_idle *w);
240void ev_idle_stop (struct ev_idle *w); 342void ev_idle_stop (EV_P_ struct ev_idle *w);
241 343
242void ev_prepare_start (struct ev_prepare *w); 344void ev_prepare_start (EV_P_ struct ev_prepare *w);
243void ev_prepare_stop (struct ev_prepare *w); 345void ev_prepare_stop (EV_P_ struct ev_prepare *w);
244 346
245void ev_check_start (struct ev_check *w); 347void ev_check_start (EV_P_ struct ev_check *w);
246void ev_check_stop (struct ev_check *w); 348void ev_check_stop (EV_P_ struct ev_check *w);
247 349
350/* only supported in the default loop */
351void ev_signal_start (EV_P_ struct ev_signal *w);
352void ev_signal_stop (EV_P_ struct ev_signal *w);
353
354/* only supported in the default loop */
248void ev_child_start (struct ev_child *w); 355void ev_child_start (EV_P_ struct ev_child *w);
249void ev_child_stop (struct ev_child *w); 356void ev_child_stop (EV_P_ struct ev_child *w);
250#endif 357#endif
251 358
252#ifdef __cplusplus 359#ifdef __cplusplus
253} 360}
254#endif 361#endif

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines