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/cvs/libev/ev.h
Revision: 1.2
Committed: Tue Oct 30 21:42:13 2007 UTC (16 years, 6 months ago) by root
Content type: text/plain
Branch: MAIN
Changes since 1.1: +2 -1 lines
Log Message:
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File Contents

# User Rev Content
1 root 1.1 #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 0
9     #define EV_READ 1
10     #define EV_WRITE 2
11     #define EV_TIMEOUT 4
12     #define EV_SIGNAL 8
13    
14     /* shared by all watchers */
15     #define EV_WATCHER(type) \
16     int active; /* private */ \
17     int pending; /* private */ \
18     void *data; /* rw */ \
19     void (*cb)(struct type *, int revents) /* rw */
20    
21     #define EV_WATCHER_LIST(type) \
22     EV_WATCHER (type); \
23     struct type *next /* private */
24    
25     struct ev_timer
26     {
27     EV_WATCHER_LIST (ev_timer);
28    
29     ev_tstamp at; /* ro */
30     ev_tstamp repeat; /* rw */
31     unsigned char is_abs; /* rw */
32     };
33    
34     struct ev_io
35     {
36     EV_WATCHER_LIST (ev_io);
37    
38     int fd; /* ro */
39     int events; /* ro */
40     };
41    
42     struct ev_signal
43     {
44     EV_WATCHER_LIST (ev_signal);
45    
46     int signum; /* ro */
47     };
48    
49     #define EVMETHOD_NONE 0
50     #define EVMETHOD_SELECT 1
51     #define EVMETHOD_EPOLL 2
52     int ev_init (int flags);
53     extern int ev_method;
54    
55     void ev_prefork (void);
56     void ev_postfork_parent (void);
57     void ev_postfork_child (void);
58    
59     extern ev_tstamp ev_now; /* time w.r.t. timers and the eventloop, updated after each poll */
60     ev_tstamp ev_time (void);
61    
62     #define EVLOOP_NONBLOCK 1 /* do not block/wait */
63     #define EVLOOP_ONESHOT 2 /* block *once* only */
64     int ev_loop (int flags);
65     extern int ev_loop_done; /* set to 1 to break out of event loop */
66    
67 root 1.2 /* these may evaluate ev multiple times, and the other arguments at most once */
68 root 1.1 #define evw_init(ev,cb_,data_) do { (ev)->active = 0; (ev)->cb = (cb_); (ev)->data = (void *)data_; } while (0)
69     #define evio_set(ev,fd_,events_) do { (ev)->fd = (fd_); (ev)->events = (events_); } while (0)
70     #define evtimer_set_rel(ev,after_,repeat_) do { (ev)->at = (after_); (ev)->repeat = (repeat_); (ev)->is_abs = 0; } while (0)
71     #define evtimer_set_abs(ev,at_,repeat_) do { (ev)->at = (at_); (ev)->repeat = (repeat_); (ev)->is_abs = 1; } while (0)
72     #define evsignal_set(ev,signum_) do { (ev)->signum = (signum_); } while (0)
73    
74 root 1.2 #define ev_is_active(ev) (0 + (ev)->active) /* true when the watcher has been started */
75 root 1.1
76     void evio_start (struct ev_io *w);
77     void evio_stop (struct ev_io *w);
78    
79     void evtimer_start (struct ev_timer *w);
80     void evtimer_stop (struct ev_timer *w);
81    
82     void evsignal_start (struct ev_signal *w);
83     void evsignal_stop (struct ev_signal *w);
84    
85     #endif
86