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annotate src/timer/epoc/SDL_systimer.cpp @ 1898:f89e49e51e89

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Playing around, trying to find a fast path with GDI
author Sam Lantinga <slouken@libsdl.org>
date Wed, 12 Jul 2006 07:01:35 +0000
parents 92947e3a18db
children
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #ifdef SDL_TIMER_EPOC
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25
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26 /*
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27 SDL_systimer.cpp
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28
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29 Epoc version by Hannu Viitala (hannu.j.viitala@mbnet.fi)
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30 */
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31
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32 #include <e32std.h>
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33 #include <e32hal.h>
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34
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35 extern "C" {
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36 #include "SDL_error.h"
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37 #include "SDL_thread.h"
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38 #include "SDL_timer.h"
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39 #include "../SDL_timer_c.h"
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40
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41 static TUint start = 0;
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42 static TInt tickPeriodMilliSeconds;
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43
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44
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45 void SDL_StartTicks(void)
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46 {
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47 /* Set first ticks value */
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48 start = User::TickCount();
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49
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50 TTimeIntervalMicroSeconds32 period;
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51 TInt tmp = UserHal::TickPeriod(period);
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52 tickPeriodMilliSeconds = period.Int() / 1000;
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53 }
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54
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55 Uint32 SDL_GetTicks(void)
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56 {
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57 TUint deltaTics = User::TickCount() - start;
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58 return(deltaTics * tickPeriodMilliSeconds);
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59 }
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60
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61 void SDL_Delay(Uint32 ms)
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62 {
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63
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64 User::After(TTimeIntervalMicroSeconds32(ms*1000));
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65 }
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66
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67 /* Data to handle a single periodic alarm */
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68 static int timer_alive = 0;
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69 static SDL_Thread *timer = NULL;
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70
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71 static int RunTimer(void *unused)
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72 {
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73 Uint32 ms;
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74
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75 while ( timer_alive ) {
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76 if ( SDL_timer_running ) {
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77 SDL_ThreadedTimerCheck();
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78 }
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79 SDL_Delay(10);
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80 }
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81 return(0);
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82 }
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83
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84 /* This is only called if the event thread is not running */
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85 int SDL_SYS_TimerInit(void)
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86 {
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87 timer_alive = 1;
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88 timer = SDL_CreateThread(RunTimer, NULL);
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89 if ( timer == NULL )
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90 return(-1);
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91 return(SDL_SetTimerThreaded(1));
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92 }
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93
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94 void SDL_SYS_TimerQuit(void)
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95 {
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96 timer_alive = 0;
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97 if ( timer ) {
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98 SDL_WaitThread(timer, NULL);
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99 timer = NULL;
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100 }
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101 }
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102
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103 int SDL_SYS_StartTimer(void)
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104 {
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105 SDL_SetError("Internal logic error: Epoc uses threaded timer");
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106 return(-1);
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107 }
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108
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109 void SDL_SYS_StopTimer(void)
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110 {
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111 return;
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112 }
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113
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114 }; // extern "C"
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115
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116 #endif /* SDL_TIMER_EPOC */