Mercurial > sdl-ios-xcode
annotate src/timer/win32/SDL_systimer.c @ 2172:bef26cfc8f79
Fixed compiling YUV code
author | Sam Lantinga <slouken@libsdl.org> |
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date | Wed, 11 Jul 2007 14:50:21 +0000 |
parents | c121d94672cb |
children | 99210400e8b9 |
rev | line source |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
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3 Copyright (C) 1997-2006 Sam Lantinga |
0 | 4 |
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 Lesser General Public |
0 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
0 | 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 | |
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13 Lesser General Public License for more details. |
0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
0 | 18 |
19 Sam Lantinga | |
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20 slouken@libsdl.org |
0 | 21 */ |
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22 #include "SDL_config.h" |
0 | 23 |
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24 #ifdef SDL_TIMER_WIN32 |
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25 |
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26 #define WIN32_LEAN_AND_MEAN |
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27 #include <windows.h> |
0 | 28 #include <mmsystem.h> |
29 | |
30 #include "SDL_timer.h" | |
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31 #include "../SDL_timer_c.h" |
0 | 32 |
33 #ifdef _WIN32_WCE | |
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34 #error This is WinCE. Please use src/timer/wince/SDL_systimer.c instead. |
0 | 35 #endif |
36 | |
37 #define TIME_WRAP_VALUE (~(DWORD)0) | |
38 | |
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39 /* The first (low-resolution) ticks value of the application */ |
0 | 40 static DWORD start; |
41 | |
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42 #ifndef USE_GETTICKCOUNT |
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43 /* Store if a high-resolution performance counter exists on the system */ |
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44 static BOOL hires_timer_available; |
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45 /* The first high-resolution ticks value of the application */ |
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46 static LARGE_INTEGER hires_start_ticks; |
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47 /* The number of ticks per second of the high-resolution performance counter */ |
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48 static LARGE_INTEGER hires_ticks_per_second; |
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49 #endif |
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50 |
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51 void |
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52 SDL_StartTicks(void) |
0 | 53 { |
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54 /* Set first ticks value */ |
0 | 55 #ifdef USE_GETTICKCOUNT |
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56 start = GetTickCount(); |
0 | 57 #else |
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58 #if 0 /* Apparently there are problems with QPC on Win2K */ |
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59 if (QueryPerformanceFrequency(&hires_ticks_per_second) == TRUE) { |
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60 hires_timer_available = TRUE; |
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61 QueryPerformanceCounter(&hires_start_ticks); |
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62 } else |
326
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63 #endif |
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64 { |
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65 hires_timer_available = FALSE; |
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66 timeBeginPeriod(1); /* use 1 ms timer precision */ |
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67 start = timeGetTime(); |
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68 } |
0 | 69 #endif |
70 } | |
71 | |
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72 Uint32 |
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73 SDL_GetTicks(void) |
0 | 74 { |
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75 DWORD now, ticks; |
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76 #ifndef USE_GETTICKCOUNT |
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77 LARGE_INTEGER hires_now; |
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78 #endif |
0 | 79 |
80 #ifdef USE_GETTICKCOUNT | |
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81 now = GetTickCount(); |
0 | 82 #else |
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83 if (hires_timer_available) { |
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84 QueryPerformanceCounter(&hires_now); |
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85 |
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86 hires_now.QuadPart -= hires_start_ticks.QuadPart; |
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87 hires_now.QuadPart *= 1000; |
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88 hires_now.QuadPart /= hires_ticks_per_second.QuadPart; |
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89 |
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90 return (DWORD) hires_now.QuadPart; |
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91 } else { |
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92 now = timeGetTime(); |
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93 } |
0 | 94 #endif |
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95 |
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96 if (now < start) { |
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97 ticks = (TIME_WRAP_VALUE - start) + now; |
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98 } else { |
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99 ticks = (now - start); |
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100 } |
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101 return (ticks); |
0 | 102 } |
103 | |
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104 void |
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105 SDL_Delay(Uint32 ms) |
0 | 106 { |
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107 Sleep(ms); |
0 | 108 } |
109 | |
110 /* Data to handle a single periodic alarm */ | |
111 static UINT timerID = 0; | |
112 | |
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113 static void CALLBACK |
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114 HandleAlarm(UINT uID, UINT uMsg, DWORD_PTR dwUser, |
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115 DWORD_PTR dw1, DWORD_PTR dw2) |
0 | 116 { |
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117 SDL_ThreadedTimerCheck(); |
0 | 118 } |
119 | |
120 | |
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121 int |
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122 SDL_SYS_TimerInit(void) |
0 | 123 { |
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124 MMRESULT result; |
0 | 125 |
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126 /* Set timer resolution */ |
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127 result = timeBeginPeriod(TIMER_RESOLUTION); |
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128 if (result != TIMERR_NOERROR) { |
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129 SDL_SetError("Warning: Can't set %d ms timer resolution", |
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130 TIMER_RESOLUTION); |
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131 } |
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132 /* Allow 10 ms of drift so we don't chew on CPU */ |
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133 timerID = |
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134 timeSetEvent(TIMER_RESOLUTION, 1, HandleAlarm, 0, TIME_PERIODIC); |
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135 if (!timerID) { |
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136 SDL_SetError("timeSetEvent() failed"); |
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137 return (-1); |
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138 } |
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139 return (SDL_SetTimerThreaded(1)); |
0 | 140 } |
141 | |
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142 void |
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143 SDL_SYS_TimerQuit(void) |
0 | 144 { |
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145 if (timerID) { |
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146 timeKillEvent(timerID); |
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147 } |
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148 timeEndPeriod(TIMER_RESOLUTION); |
0 | 149 } |
150 | |
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151 int |
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152 SDL_SYS_StartTimer(void) |
0 | 153 { |
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Sam Lantinga <slouken@libsdl.org>
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154 SDL_SetError("Internal logic error: Win32 uses threaded timer"); |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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155 return (-1); |
0 | 156 } |
157 | |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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158 void |
c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1635
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159 SDL_SYS_StopTimer(void) |
0 | 160 { |
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c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
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161 return; |
0 | 162 } |
163 | |
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Make sure code is only compiled if the appropriate subsystem is enabled
Sam Lantinga <slouken@libsdl.org>
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164 #endif /* SDL_TIMER_WIN32 */ |
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SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents:
1635
diff
changeset
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165 /* vi: set ts=4 sw=4 expandtab: */ |