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comparison src/timer/epoc/SDL_systimer.cpp @ 173:83018110dce8

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Added initial support for EPOC/Symbian OS (thanks Hannu!)
author Sam Lantinga <slouken@libsdl.org>
date Tue, 11 Sep 2001 20:38:49 +0000
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children e8157fcb3114
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172:37e3ca9254c7 173:83018110dce8
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997, 1998, 1999, 2000, 2001 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 */
28
29 #include <e32std.h>
30 #include <e32hal.h>
31
32 extern "C" {
33 #include "SDL_error.h"
34 #include "SDL_thread.h"
35 #include "SDL_timer.h"
36 #include "SDL_timer_c.h"
37
38 static TUint start = 0;
39 static TInt tickPeriodMilliSeconds;
40
41
42 void SDL_StartTicks(void)
43 {
44 /* Set first ticks value */
45 start = User::TickCount();
46
47 TTimeIntervalMicroSeconds32 period;
48 TInt tmp = UserHal::TickPeriod(period);
49 tickPeriodMilliSeconds = period.Int() / 1000;
50 }
51
52 Uint32 SDL_GetTicks(void)
53 {
54 TUint deltaTics = User::TickCount() - start;
55 return(deltaTics * tickPeriodMilliSeconds);
56 }
57
58 void SDL_Delay(Uint32 ms)
59 {
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 Uint32 ms;
71
72 while ( timer_alive ) {
73 if ( SDL_timer_running ) {
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 timer_alive = 1;
85 timer = SDL_CreateThread(RunTimer, NULL);
86 if ( timer == NULL )
87 return(-1);
88 return(SDL_SetTimerThreaded(1));
89 }
90
91 void SDL_SYS_TimerQuit(void)
92 {
93 timer_alive = 0;
94 if ( timer ) {
95 SDL_WaitThread(timer, NULL);
96 timer = NULL;
97 }
98 }
99
100 int SDL_SYS_StartTimer(void)
101 {
102 SDL_SetError("Internal logic error: Epoc uses threaded timer");
103 return(-1);
104 }
105
106 void SDL_SYS_StopTimer(void)
107 {
108 return;
109 }
110
111 }; // extern "C"