Rev 3 | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
3 | magnus | 1 | <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
2 | <html><head> |
||
3 | <title>liboop: oop_sys_run()</title> |
||
4 | <link rel="stylesheet" type="text/css" href="style.css"> |
||
5 | </head><body> |
||
6 | |||
7 | <h2>oop_sys_run(), oop_sys_run_once()</h2> |
||
8 | |||
9 | <pre> |
||
10 | #include <oop.h> |
||
11 | |||
12 | /* <em>Run the event loop.</em> */ |
||
13 | oop_source *oop_sys_run(oop_source_sys *sys); |
||
14 | oop_source *oop_sys_run_once(oop_source_sys *sys); |
||
15 | </pre> |
||
16 | |||
17 | <h3>Arguments.</h3> |
||
18 | <dl> |
||
19 | <dt><b>oop_source_sys *sys</b> |
||
20 | <dd>The event source to operate. |
||
21 | </dl> |
||
22 | |||
23 | <h3>Description.</h3> |
||
24 | |||
25 | The oop_sys_run() function starts waiting for events registered with the |
||
26 | system event source <em>sys</em>. As events (file descriptor activity, timed |
||
27 | events, and signals) occur, the appropriate event sinks are called. As long |
||
28 | as these callbacks return OOP_CONTINUE, the function continues running and |
||
29 | processing events.<p> |
||
30 | |||
31 | When one of the callbacks returns some other value, oop_sys_run returns this |
||
32 | value. You can use this technique to allow callbacks to return data to the |
||
33 | "owner" of the event loop (the caller of oop_sys_run). You may then decide |
||
34 | whether to restart the event loop (by calling oop_sys_run again) or not.<p> |
||
35 | |||
36 | If an error occurs waiting for events, oop_sys_run returns OOP_ERROR. |
||
37 | If no event sinks are registered (which would lead to an infinite delay), |
||
38 | oop_sys_run returns OOP_CONTINUE.<p> |
||
39 | |||
40 | The oop_sys_run_once() function behaves just like oop_sys_run(), but returns |
||
41 | immediately after processing any pending results. The return values are the |
||
42 | same as oop_sys_run(), except that a return of OOP_CONTINUE does not |
||
43 | necessarily mean that no event sinks are registered.<p> |
||
44 | |||
12 | magnus | 45 | <hr><a href="ref.html">liboop reference</a></body></html> |