1 | /* |
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2 | Bullet Continuous Collision Detection and Physics Library |
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3 | Copyright (c) 2007 Starbreeze Studios |
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4 | |
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5 | This software is provided 'as-is', without any express or implied warranty. |
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6 | In no event will the authors be held liable for any damages arising from the use of this software. |
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7 | Permission is granted to anyone to use this software for any purpose, |
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8 | including commercial applications, and to alter it and redistribute it freely, |
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9 | subject to the following restrictions: |
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10 | |
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11 | 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. |
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12 | 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. |
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13 | 3. This notice may not be removed or altered from any source distribution. |
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14 | |
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15 | Written by: Marten Svanfeldt |
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16 | */ |
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17 | |
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18 | #ifndef SPU_SYNC_H |
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19 | #define SPU_SYNC_H |
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20 | |
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21 | |
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22 | #include "PlatformDefinitions.h" |
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23 | |
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24 | |
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25 | #if defined(WIN32) |
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26 | |
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27 | #define WIN32_LEAN_AND_MEAN |
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28 | #ifdef _XBOX |
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29 | #include <Xtl.h> |
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30 | #else |
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31 | #include <Windows.h> |
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32 | #endif |
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33 | |
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34 | class btSpinlock |
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35 | { |
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36 | public: |
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37 | //typedef volatile LONG SpinVariable; |
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38 | typedef CRITICAL_SECTION SpinVariable; |
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39 | |
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40 | btSpinlock (SpinVariable* var) |
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41 | : spinVariable (var) |
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42 | {} |
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43 | |
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44 | void Init () |
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45 | { |
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46 | //*spinVariable = 0; |
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47 | InitializeCriticalSection(spinVariable); |
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48 | } |
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49 | |
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50 | void Lock () |
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51 | { |
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52 | EnterCriticalSection(spinVariable); |
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53 | } |
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54 | |
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55 | void Unlock () |
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56 | { |
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57 | LeaveCriticalSection(spinVariable); |
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58 | } |
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59 | |
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60 | private: |
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61 | SpinVariable* spinVariable; |
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62 | }; |
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63 | |
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64 | |
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65 | #elif defined (__CELLOS_LV2__) |
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66 | |
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67 | //#include <cell/atomic.h> |
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68 | #include <cell/sync/mutex.h> |
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69 | |
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70 | class btSpinlock |
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71 | { |
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72 | public: |
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73 | typedef CellSyncMutex SpinVariable; |
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74 | |
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75 | btSpinlock (SpinVariable* var) |
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76 | : spinVariable (var) |
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77 | {} |
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78 | |
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79 | void Init () |
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80 | { |
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81 | #ifndef __SPU__ |
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82 | //*spinVariable = 1; |
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83 | cellSyncMutexInitialize(spinVariable); |
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84 | #endif |
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85 | } |
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86 | |
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87 | |
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88 | |
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89 | void Lock () |
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90 | { |
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91 | #ifdef __SPU__ |
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92 | // lock semaphore |
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93 | /*while (cellAtomicTestAndDecr32(atomic_buf, (uint64_t)spinVariable) == 0) |
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94 | { |
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95 | |
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96 | };*/ |
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97 | cellSyncMutexLock((uint64_t)spinVariable); |
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98 | #endif |
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99 | } |
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100 | |
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101 | void Unlock () |
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102 | { |
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103 | #ifdef __SPU__ |
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104 | //cellAtomicIncr32(atomic_buf, (uint64_t)spinVariable); |
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105 | cellSyncMutexUnlock((uint64_t)spinVariable); |
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106 | #endif |
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107 | } |
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108 | |
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109 | |
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110 | private: |
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111 | SpinVariable* spinVariable; |
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112 | ATTRIBUTE_ALIGNED128(uint32_t atomic_buf[32]); |
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113 | }; |
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114 | |
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115 | #else |
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116 | //create a dummy implementation (without any locking) useful for serial processing |
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117 | class btSpinlock |
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118 | { |
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119 | public: |
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120 | typedef int SpinVariable; |
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121 | |
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122 | btSpinlock (SpinVariable* var) |
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123 | : spinVariable (var) |
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124 | {} |
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125 | |
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126 | void Init () |
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127 | { |
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128 | } |
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129 | |
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130 | void Lock () |
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131 | { |
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132 | } |
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133 | |
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134 | void Unlock () |
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135 | { |
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136 | } |
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137 | |
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138 | private: |
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139 | SpinVariable* spinVariable; |
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140 | }; |
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141 | |
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142 | |
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143 | #endif |
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144 | |
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145 | |
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146 | #endif |
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