| 1 |
#ifndef EV_H |
| 2 |
#define EV_H |
| 3 |
|
| 4 |
typedef double ev_tstamp; |
| 5 |
|
| 6 |
/* eventmask, revents, events... */ |
| 7 |
#define EV_UNDEF -1 /* guaranteed to be invalid */ |
| 8 |
#define EV_NONE 0x00 |
| 9 |
#define EV_READ 0x01 |
| 10 |
#define EV_WRITE 0x02 |
| 11 |
#define EV_TIMEOUT 0x04 |
| 12 |
#define EV_SIGNAL 0x08 |
| 13 |
#define EV_IDLE 0x10 |
| 14 |
#define EV_CHECK 0x20 |
| 15 |
|
| 16 |
/* shared by all watchers */ |
| 17 |
#define EV_WATCHER(type) \ |
| 18 |
int active; /* private */ \ |
| 19 |
int pending; /* private */ \ |
| 20 |
void *data; /* rw */ \ |
| 21 |
void (*cb)(struct type *, int revents) /* rw */ /* gets invoked with an eventmask */ |
| 22 |
|
| 23 |
#define EV_WATCHER_LIST(type) \ |
| 24 |
EV_WATCHER (type); \ |
| 25 |
struct type *next /* private */ |
| 26 |
|
| 27 |
/* invoked at a specific time or after a specific time, repeatable */ |
| 28 |
struct ev_timer |
| 29 |
{ |
| 30 |
EV_WATCHER_LIST (ev_timer); |
| 31 |
|
| 32 |
ev_tstamp at; /* private */ |
| 33 |
ev_tstamp repeat; /* rw */ |
| 34 |
unsigned char is_abs; /* ro */ |
| 35 |
}; |
| 36 |
|
| 37 |
/* invoked when fd is either EV_READable or EV_WRITEable */ |
| 38 |
struct ev_io |
| 39 |
{ |
| 40 |
EV_WATCHER_LIST (ev_io); |
| 41 |
|
| 42 |
int fd; /* ro */ |
| 43 |
int events; /* ro */ |
| 44 |
}; |
| 45 |
|
| 46 |
/* invoked when the given signal has been received */ |
| 47 |
struct ev_signal |
| 48 |
{ |
| 49 |
EV_WATCHER_LIST (ev_signal); |
| 50 |
|
| 51 |
int signum; /* ro */ |
| 52 |
}; |
| 53 |
|
| 54 |
/* invoked when the nothing else needs to be done, keeps the process from blocking */ |
| 55 |
struct ev_idle |
| 56 |
{ |
| 57 |
EV_WATCHER (ev_idle); |
| 58 |
}; |
| 59 |
|
| 60 |
/* invoked for each run of the mainloop, just before the next blocking vall is initiated */ |
| 61 |
struct ev_check |
| 62 |
{ |
| 63 |
EV_WATCHER (ev_check); |
| 64 |
}; |
| 65 |
|
| 66 |
#define EVMETHOD_NONE 0 |
| 67 |
#define EVMETHOD_SELECT 1 |
| 68 |
#define EVMETHOD_EPOLL 2 |
| 69 |
int ev_init (int flags); /* returns ev_method */ |
| 70 |
extern int ev_method; |
| 71 |
|
| 72 |
/* these three calls are suitable for plugging into pthread_atfork */ |
| 73 |
void ev_prefork (void); |
| 74 |
void ev_postfork_parent (void); |
| 75 |
void ev_postfork_child (void); |
| 76 |
|
| 77 |
extern ev_tstamp ev_now; /* time w.r.t. timers and the eventloop, updated after each poll */ |
| 78 |
ev_tstamp ev_time (void); |
| 79 |
|
| 80 |
#define EVLOOP_NONBLOCK 1 /* do not block/wait */ |
| 81 |
#define EVLOOP_ONESHOT 2 /* block *once* only */ |
| 82 |
void ev_loop (int flags); |
| 83 |
extern int ev_loop_done; /* set to 1 to break out of event loop */ |
| 84 |
|
| 85 |
/* these may evaluate ev multiple times, and the other arguments at most once */ |
| 86 |
#define evw_init(ev,cb_,data_) do { (ev)->active = 0; (ev)->cb = (cb_); (ev)->data = (void *)data_; } while (0) |
| 87 |
|
| 88 |
#define evio_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0) |
| 89 |
#define evtimer_set_rel(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); (ev)->is_abs = 0; } while (0) |
| 90 |
#define evtimer_set_abs(ev,at_,repeat_) do { (ev)->at = (at_); (ev)->repeat = (repeat_); (ev)->is_abs = 1; } while (0) |
| 91 |
#define evsignal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0) |
| 92 |
|
| 93 |
#define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */ |
| 94 |
|
| 95 |
/* stopping (enabling, adding) a watcher does nothing if it is already running */ |
| 96 |
/* stopping (disabling, deleting) a watcher does nothing unless its already running */ |
| 97 |
void evio_start (struct ev_io *w); |
| 98 |
void evio_stop (struct ev_io *w); |
| 99 |
|
| 100 |
void evtimer_start (struct ev_timer *w); |
| 101 |
void evtimer_stop (struct ev_timer *w); |
| 102 |
|
| 103 |
void evsignal_start (struct ev_signal *w); |
| 104 |
void evsignal_stop (struct ev_signal *w); |
| 105 |
|
| 106 |
void evidle_start (struct ev_idle *w); |
| 107 |
void evidle_stop (struct ev_idle *w); |
| 108 |
|
| 109 |
void evcheck_start (struct ev_check *w); |
| 110 |
void evcheck_stop (struct ev_check *w); |
| 111 |
|
| 112 |
#endif |
| 113 |
|
