e14743d1 |
1 | /* |
2 | SDL - Simple DirectMedia Layer |
3 | Copyright (C) 1997-2009 Sam Lantinga |
4 | |
5 | This library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Library General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2 of the License, or (at your option) any later version. |
9 | |
10 | This library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Library General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Library General Public |
16 | License along with this library; if not, write to the Free |
17 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
18 | |
19 | Sam Lantinga |
20 | slouken@devolution.com |
21 | */ |
22 | |
23 | /* |
24 | SDL_systimer.cpp |
25 | |
26 | Epoc version by Hannu Viitala (hannu.j.viitala@mbnet.fi) |
27 | Markus Mertama |
28 | */ |
29 | |
30 | #include <e32std.h> |
31 | #include <e32hal.h> |
32 | |
33 | extern "C" { |
34 | #include "SDL_error.h" |
35 | #include "SDL_thread.h" |
36 | #include "SDL_timer.h" |
37 | #include "SDL_timer_c.h" |
38 | |
39 | static TUint start = 0; |
40 | static TInt tickPeriodMilliSeconds; |
41 | |
42 | |
43 | void SDL_StartTicks(void) |
44 | { |
45 | /* Set first ticks value */ |
46 | start = User::TickCount(); |
47 | |
48 | TTimeIntervalMicroSeconds32 period; |
49 | TInt tmp = UserHal::TickPeriod(period); |
50 | tickPeriodMilliSeconds = period.Int() / 1000; |
51 | } |
52 | |
53 | Uint32 SDL_GetTicks(void) |
54 | { |
55 | TUint deltaTics = User::TickCount() - start; |
56 | return(deltaTics * tickPeriodMilliSeconds); |
57 | } |
58 | |
59 | void SDL_Delay(Uint32 ms) |
60 | { |
61 | User::After(TTimeIntervalMicroSeconds32(ms*1000)); |
62 | } |
63 | |
64 | /* Data to handle a single periodic alarm */ |
65 | static int timer_alive = 0; |
66 | static SDL_Thread *timer = NULL; |
67 | |
68 | static int RunTimer(void *unused) |
69 | { |
70 | while ( timer_alive ) |
71 | { |
72 | if (SDL_timer_running) |
73 | { |
74 | SDL_ThreadedTimerCheck(); |
75 | } |
76 | SDL_Delay(10); |
77 | } |
78 | return(0); |
79 | } |
80 | |
81 | /* This is only called if the event thread is not running */ |
82 | int SDL_SYS_TimerInit(void) |
83 | { |
84 | if(timer != NULL) |
85 | return (-1); |
86 | timer_alive = 1; |
87 | timer = SDL_CreateThread(RunTimer, NULL); |
88 | if ( timer == NULL ) |
89 | return(-1); |
90 | return(SDL_SetTimerThreaded(1)); |
91 | } |
92 | |
93 | void SDL_SYS_TimerQuit(void) |
94 | { |
95 | timer_alive = 0; |
96 | if ( timer ) |
97 | { |
98 | SDL_WaitThread(timer, NULL); |
99 | timer = NULL; |
100 | } |
101 | } |
102 | |
103 | int SDL_SYS_StartTimer(void) |
104 | { |
105 | SDL_SetError("Internal logic error: Epoc uses threaded timer"); |
106 | return(-1); |
107 | } |
108 | |
109 | void SDL_SYS_StopTimer(void) |
110 | { |
111 | return; |
112 | } |
113 | |
114 | } // extern "C" |