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annotate src/timer/riscos/SDL_systimer.c @ 816:428f688f2ad2

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Date: Fri, 13 Feb 2004 17:03:16 +0100 From: Max Horn Subject: Modifier key fix The internal modifier state can get out of sync with reality. To trigger this, do for example this: 1) Launch an SDL app 2) Alt-click on the desktop (this will hide the SDL app). 3) Bring the SDL app back to the front 4) SDL will still think alt is pressed (and as such will treat left clicks like middle clicks). If you press and release alt, it'll be fine again. The attached patch cures this by rechecking the modifier state whenever we process an event.
author Sam Lantinga <slouken@libsdl.org>
date Fri, 13 Feb 2004 17:57:16 +0000
parents b8d311d90021
children d74fbf56f2f6
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 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@devolution.com
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 #include <stdio.h>
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29 #include <time.h>
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30 #include <sys/time.h>
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31 #include <unistd.h>
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32 #include <string.h>
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33 #include <errno.h>
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34
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35 #include "SDL_error.h"
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36 #include "SDL_timer.h"
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37 #include "SDL_timer_c.h"
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38
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39 /* Timer start/reset time */
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40 static Uint32 timerStart;
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41 /* Timer running function */
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42 void RISCOS_CheckTimer();
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43
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44 extern void RISCOS_BackgroundTasks(void);
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45
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46 /* The first ticks value of the application */
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47 clock_t start;
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48
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49 void SDL_StartTicks(void)
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50 {
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51 /* Set first ticks value */
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52 start = clock();
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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 clock_t ticks;
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58
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59 ticks=clock()-start;
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60
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61
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62 #if CLOCKS_PER_SEC == 1000
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63
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64 return(ticks);
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65
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66 #elif CLOCKS_PER_SEC == 100
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67
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68 return (ticks * 10);
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69
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70 #else
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71
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72 return ticks*(1000/CLOCKS_PER_SEC);
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73
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74 #endif
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75
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76 }
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77
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78 extern void DRenderer_FillBuffers();
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79
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80 void SDL_Delay (Uint32 ms)
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81 {
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82 Uint32 now,then,elapsed;
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83
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84 /* Set the timeout interval - Linux only needs to do this once */
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85 then = SDL_GetTicks();
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86
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87 do {
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88 /* Do background tasks required while sleeping as we are not multithreaded */
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89 RISCOS_BackgroundTasks();
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90 /* Calculate the time interval left (in case of interrupt) */
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91 now = SDL_GetTicks();
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92 elapsed = (now-then);
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93 then = now;
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94 if ( elapsed >= ms ) {
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95 break;
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96 }
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97 ms -= elapsed;
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98
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99 } while ( 1 );
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100 }
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101
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102 int SDL_SYS_TimerInit(void)
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103 {
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104 return(0);
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105 }
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106
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107 void SDL_SYS_TimerQuit(void)
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108 {
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109 SDL_SetTimer(0, NULL);
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110 }
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111
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112 int SDL_SYS_StartTimer(void)
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113 {
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114 timerStart = SDL_GetTicks();
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115
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116 return(0);
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117 }
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118
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119 void SDL_SYS_StopTimer(void)
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120 {
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121 /* Don't need to do anything as we use SDL_timer_running
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122 to detect if we need to check the timer */
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123 }
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124
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125
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126 void RISCOS_CheckTimer()
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127 {
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128 if (SDL_timer_running && SDL_GetTicks() - timerStart >= SDL_alarm_interval)
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129 {
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130 Uint32 ms;
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131
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132 ms = SDL_alarm_callback(SDL_alarm_interval);
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133 if ( ms != SDL_alarm_interval )
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134 {
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135 if ( ms )
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136 {
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137 SDL_alarm_interval = ROUND_RESOLUTION(ms);
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138 } else
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139 {
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140 SDL_alarm_interval = 0;
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141 SDL_timer_running = 0;
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142 }
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143 }
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144 if (SDL_alarm_interval) timerStart = SDL_GetTicks();
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145 }
550bccdf04bd Added initial support for RISC OS (thanks Peter Naulls!)
Sam Lantinga <slouken@libsdl.org>
parents:
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