1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 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@libsdl.org
21 */
22 #include "SDL_config.h"
23
24 #ifdef SDL_TIMER_EPOC
25
26 /*
27 SDL_systimer.cpp
28
29 Epoc version by Hannu Viitala (hannu.j.viitala@mbnet.fi)
30 */
31
32 #include <e32std.h>
33 #include <e32hal.h>
34
35 extern "C" {
36 #include "SDL_error.h"
37 #include "SDL_thread.h"
38 #include "SDL_timer.h"
39 #include "../SDL_timer_c.h"
40
41 static TUint start = 0;
42 static TInt tickPeriodMilliSeconds;
43
44
SDL_StartTicks(void)45 void SDL_StartTicks(void)
46 {
47 /* Set first ticks value */
48 start = User::TickCount();
49
50 TTimeIntervalMicroSeconds32 period;
51 TInt tmp = UserHal::TickPeriod(period);
52 tickPeriodMilliSeconds = period.Int() / 1000;
53 }
54
SDL_GetTicks(void)55 Uint32 SDL_GetTicks(void)
56 {
57 TUint deltaTics = User::TickCount() - start;
58 return(deltaTics * tickPeriodMilliSeconds);
59 }
60
SDL_Delay(Uint32 ms)61 void SDL_Delay(Uint32 ms)
62 {
63
64 User::After(TTimeIntervalMicroSeconds32(ms*1000));
65 }
66
67 /* Data to handle a single periodic alarm */
68 static int timer_alive = 0;
69 static SDL_Thread *timer = NULL;
70
RunTimer(void * unused)71 static int RunTimer(void *unused)
72 {
73 Uint32 ms;
74
75 while ( timer_alive ) {
76 if ( SDL_timer_running ) {
77 SDL_ThreadedTimerCheck();
78 }
79 SDL_Delay(10);
80 }
81 return(0);
82 }
83
84 /* This is only called if the event thread is not running */
SDL_SYS_TimerInit(void)85 int SDL_SYS_TimerInit(void)
86 {
87 timer_alive = 1;
88 timer = SDL_CreateThread(RunTimer, NULL);
89 if ( timer == NULL )
90 return(-1);
91 return(SDL_SetTimerThreaded(1));
92 }
93
SDL_SYS_TimerQuit(void)94 void SDL_SYS_TimerQuit(void)
95 {
96 timer_alive = 0;
97 if ( timer ) {
98 SDL_WaitThread(timer, NULL);
99 timer = NULL;
100 }
101 }
102
SDL_SYS_StartTimer(void)103 int SDL_SYS_StartTimer(void)
104 {
105 SDL_SetError("Internal logic error: Epoc uses threaded timer");
106 return(-1);
107 }
108
SDL_SYS_StopTimer(void)109 void SDL_SYS_StopTimer(void)
110 {
111 return;
112 }
113
114 }; // extern "C"
115
116 #endif /* SDL_TIMER_EPOC */
117