Commit | Line | Data |
cf23a5da |
1 | <div class="pod"> |
2 | <!-- INDEX START --> |
3 | <h3 id="TOP">Index</h3> |
4 | |
5 | <ul><li><a href="#NAME">NAME</a></li> |
980e45b1 |
6 | <li><a href="#CATEGORY">CATEGORY</a></li> |
cf23a5da |
7 | <li><a href="#SYNOPSIS">SYNOPSIS</a></li> |
8 | <li><a href="#METHODS">METHODS</a> |
05c66c33 |
9 | <ul><li><a href="#add_timer_interval_callback">add_timer(interval, callback)</a></li> |
10 | <li><a href="#remove_timer_id">remove_timer(id)</a> |
cf23a5da |
11 | </li> |
12 | </ul> |
13 | </li> |
14 | </ul><hr /> |
15 | <!-- INDEX END --> |
16 | |
17 | <h1 id="NAME">NAME</h1><p><a href="#TOP" class="toplink">Top</a></p> |
18 | <div id="NAME_CONTENT"> |
05c66c33 |
19 | <p>SDL::Time - An SDL Perl extension for managing timers</p> |
cf23a5da |
20 | |
980e45b1 |
21 | </div> |
22 | <h1 id="CATEGORY">CATEGORY</h1><p><a href="#TOP" class="toplink">Top</a></p> |
23 | <div id="CATEGORY_CONTENT"> |
24 | <p>Core</p> |
cf23a5da |
25 | |
26 | </div> |
27 | <h1 id="SYNOPSIS">SYNOPSIS</h1><p><a href="#TOP" class="toplink">Top</a></p> |
28 | <div id="SYNOPSIS_CONTENT"> |
05c66c33 |
29 | <pre> use threads; |
30 | use threads::shared; |
cf23a5da |
31 | |
05c66c33 |
32 | use SDL ':all'; |
33 | use SDL::Time; |
cf23a5da |
34 | |
05c66c33 |
35 | package foo; |
cf23a5da |
36 | |
05c66c33 |
37 | SDL::init(SDL_INIT_TIMER); |
cf23a5da |
38 | |
05c66c33 |
39 | my $tick :shared = 0; |
40 | sub ticker { $tick++; warn $tick; return 100; } |
cf23a5da |
41 | |
05c66c33 |
42 | package main; |
cf23a5da |
43 | |
05c66c33 |
44 | my $id = SDL::Time::add_timer(100, 'foo::ticker'); |
cf23a5da |
45 | |
05c66c33 |
46 | sleep(2); |
cf23a5da |
47 | |
05c66c33 |
48 | SDL::Time::remove_timer($id); |
cf23a5da |
49 | |
50 | </pre> |
51 | |
52 | </div> |
53 | <h1 id="METHODS">METHODS</h1><p><a href="#TOP" class="toplink">Top</a></p> |
54 | <div id="METHODS_CONTENT"> |
55 | |
cf23a5da |
56 | </div> |
05c66c33 |
57 | <h2 id="add_timer_interval_callback">add_timer(interval, callback)</h2> |
cf23a5da |
58 | <div id="add_timer_interval_callback_CONTENT"> |
05c66c33 |
59 | <p>This runs in a separate thread and a cloned Perl thread.</p> |
60 | <p>The <code>callback</code> function, specified with a string of the function's name, will be called after the milliseconds of <code>interval</code> have elapsed. |
61 | The actual delay may be longer than specified depending on the underlying OS. |
62 | The callback function is passed the current timer interval as well as the <code>interval</code> parameter and should return the next timer interval. |
63 | If the return value from the callback is 0, the timer is cancelled; otherwise, the timer will continue to run.</p> |
64 | <p>The timer callback function may run in a different thread to your main program, so it shouldn't call any functions from within itself. |
65 | You may call SDL::push_event, however.</p> |
66 | <p><code>SDL::Time::add_timer</code> returns the identifier value of the generated timer or undef on error.</p> |
67 | <p><strong>Note:</strong> You must initialize (<code>SDL::init</code>) the timer subsystem to use this function.</p> |
cf23a5da |
68 | |
69 | </div> |
05c66c33 |
70 | <h2 id="remove_timer_id">remove_timer(id)</h2> |
cf23a5da |
71 | <div id="remove_timer_id_CONTENT"> |
05c66c33 |
72 | <p>The other way to cancel a timer is to use <code>SDL::Time::remove_timer</code> on the <code>id</code> of a timer. |
73 | This <code>id</code> is the return value of the <code>SDL::Time::remove_timer</code> function.</p> |
74 | <p><code>SDL::Time::remove_timer</code> returns <code>0</code> on success or <code>-1</code> on error.</p> |
cf23a5da |
75 | |
76 | </div> |
77 | </div> |