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annotate deps/Platinum/ThirdParty/Neptune/Source/Core/NptThreads.h @ 0:3425707ddbf6

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author fraserofthenight
date Mon, 06 Jul 2009 08:06:28 -0700
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1 /*****************************************************************
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2 |
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3 | Neptune - Threads
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4 |
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5 | Copyright (c) 2002-2008, Axiomatic Systems, LLC.
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6 | All rights reserved.
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7 |
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8 | Redistribution and use in source and binary forms, with or without
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9 | modification, are permitted provided that the following conditions are met:
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10 | * Redistributions of source code must retain the above copyright
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11 | notice, this list of conditions and the following disclaimer.
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12 | * Redistributions in binary form must reproduce the above copyright
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13 | notice, this list of conditions and the following disclaimer in the
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14 | documentation and/or other materials provided with the distribution.
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15 | * Neither the name of Axiomatic Systems nor the
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16 | names of its contributors may be used to endorse or promote products
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17 | derived from this software without specific prior written permission.
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18 |
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19 | THIS SOFTWARE IS PROVIDED BY AXIOMATIC SYSTEMS ''AS IS'' AND ANY
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20 | EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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21 | WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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22 | DISCLAIMED. IN NO EVENT SHALL AXIOMATIC SYSTEMS BE LIABLE FOR ANY
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23 | DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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24 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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25 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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26 | ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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27 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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28 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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29 |
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30 ****************************************************************/
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31
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32 #ifndef _NPT_THREADS_H_
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33 #define _NPT_THREADS_H_
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34
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35 /*----------------------------------------------------------------------
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36 | includes
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37 +---------------------------------------------------------------------*/
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38 #include "NptTypes.h"
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39 #include "NptConstants.h"
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40 #include "NptInterfaces.h"
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41
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42 /*----------------------------------------------------------------------
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43 | error codes
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44 +---------------------------------------------------------------------*/
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45 const int NPT_ERROR_CALLBACK_HANDLER_SHUTDOWN = NPT_ERROR_BASE_THREADS-0;
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46 const int NPT_ERROR_CALLBACK_NOTHING_PENDING = NPT_ERROR_BASE_THREADS-1;
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47
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48 /*----------------------------------------------------------------------
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49 | NPT_MutexInterface
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50 +---------------------------------------------------------------------*/
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51 class NPT_MutexInterface
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52 {
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53 public:
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54 // methods
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55 virtual ~NPT_MutexInterface() {}
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56 virtual NPT_Result Lock() = 0;
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57 virtual NPT_Result Unlock() = 0;
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58 };
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59
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60 /*----------------------------------------------------------------------
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61 | NPT_Mutex
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62 +---------------------------------------------------------------------*/
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63 class NPT_Mutex : public NPT_MutexInterface
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64 {
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65 public:
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66 // methods
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67 NPT_Mutex();
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68 ~NPT_Mutex() { delete m_Delegate; }
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69 NPT_Result Lock() { return m_Delegate->Lock(); }
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70 NPT_Result Unlock() { return m_Delegate->Unlock(); }
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71
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72 private:
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73 // members
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74 NPT_MutexInterface* m_Delegate;
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75 };
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76
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77 /*----------------------------------------------------------------------
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78 | NPT_AutoLock
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79 +---------------------------------------------------------------------*/
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80 class NPT_AutoLock
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81 {
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82 public:
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83 // methods
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84 NPT_AutoLock(NPT_Mutex &mutex) : m_Mutex(mutex) {
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85 m_Mutex.Lock();
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86 }
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87 ~NPT_AutoLock() {
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88 m_Mutex.Unlock();
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89 }
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90
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91 private:
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92 // members
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93 NPT_Mutex& m_Mutex;
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94 };
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95
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96 /*----------------------------------------------------------------------
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97 | NPT_Lock
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98 +---------------------------------------------------------------------*/
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99 template <typename T>
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100 class NPT_Lock : public T,
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101 public NPT_Mutex
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102 {
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103 };
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104
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105 /*----------------------------------------------------------------------
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106 | NPT_SharedVariableInterface
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107 +---------------------------------------------------------------------*/
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108 class NPT_SharedVariableInterface
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109 {
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110 public:
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111 // methods
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112 virtual ~NPT_SharedVariableInterface() {}
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113 virtual void SetValue(int value)= 0;
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114 virtual int GetValue() = 0;
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115 virtual NPT_Result WaitUntilEquals(int value, NPT_Timeout timeout = NPT_TIMEOUT_INFINITE) = 0;
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116 virtual NPT_Result WaitWhileEquals(int value, NPT_Timeout timeout = NPT_TIMEOUT_INFINITE) = 0;
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117 };
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118
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119 /*----------------------------------------------------------------------
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120 | NPT_SharedVariable
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121 +---------------------------------------------------------------------*/
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122 class NPT_SharedVariable : public NPT_SharedVariableInterface
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123 {
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124 public:
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125 // methods
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126 NPT_SharedVariable(int value = 0);
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127 ~NPT_SharedVariable() { delete m_Delegate; }
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128 void SetValue(int value) {
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129 m_Delegate->SetValue(value);
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130 }
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131 int GetValue() {
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132 return m_Delegate->GetValue();
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133 }
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134 NPT_Result WaitUntilEquals(int value, NPT_Timeout timeout = NPT_TIMEOUT_INFINITE) {
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135 return m_Delegate->WaitUntilEquals(value, timeout);
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136 }
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137 NPT_Result WaitWhileEquals(int value, NPT_Timeout timeout = NPT_TIMEOUT_INFINITE) {
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138 return m_Delegate->WaitWhileEquals(value, timeout);
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139 }
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140
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141 private:
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142 // members
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143 NPT_SharedVariableInterface* m_Delegate;
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144 };
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145
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146 /*----------------------------------------------------------------------
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147 | NPT_AtomicVariableInterface
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148 +---------------------------------------------------------------------*/
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149 class NPT_AtomicVariableInterface
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150 {
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151 public:
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152 // methods
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153 virtual ~NPT_AtomicVariableInterface() {}
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154 virtual int Increment() = 0;
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155 virtual int Decrement() = 0;
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156 virtual int GetValue() = 0;
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157 virtual void SetValue(int value) = 0;
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158 };
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159
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160 /*----------------------------------------------------------------------
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161 | NPT_AtomicVariable
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162 +---------------------------------------------------------------------*/
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163 class NPT_AtomicVariable : public NPT_AtomicVariableInterface
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164 {
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165 public:
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166 // methods
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167 NPT_AtomicVariable(int value = 0);
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168 ~NPT_AtomicVariable() { delete m_Delegate; }
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169 int Increment() { return m_Delegate->Increment();}
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170 int Decrement() { return m_Delegate->Decrement();}
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171 void SetValue(int value) { m_Delegate->SetValue(value); }
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172 int GetValue() { return m_Delegate->GetValue(); }
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173
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174 private:
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175 // members
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176 NPT_AtomicVariableInterface* m_Delegate;
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177 };
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178
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179 /*----------------------------------------------------------------------
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180 | NPT_Runnable
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181 +---------------------------------------------------------------------*/
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182 class NPT_Runnable
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183 {
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184 public:
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185 virtual ~NPT_Runnable() {}
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186 virtual void Run() = 0;
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187 };
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188
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189 /*----------------------------------------------------------------------
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190 | NPT_ThreadInterface
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191 +---------------------------------------------------------------------*/
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192 class NPT_ThreadInterface: public NPT_Runnable, public NPT_Interruptible
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193 {
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194 public:
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195 // methods
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196 virtual ~NPT_ThreadInterface() {}
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197 virtual NPT_Result Start() = 0;
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198 virtual NPT_Result Wait(NPT_Timeout timeout = NPT_TIMEOUT_INFINITE) = 0;
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199 };
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200
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201 /*----------------------------------------------------------------------
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202 | NPT_Thread
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203 +---------------------------------------------------------------------*/
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204 class NPT_Thread : public NPT_ThreadInterface
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205 {
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206 public:
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207 // types
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208 typedef unsigned long ThreadId;
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209
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210 // class methods
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211 static ThreadId GetCurrentThreadId();
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212
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213 // methods
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214 explicit NPT_Thread(bool detached = false);
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215 explicit NPT_Thread(NPT_Runnable& target, bool detached = false);
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216 ~NPT_Thread() { delete m_Delegate; }
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217
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218 // NPT_ThreadInterface methods
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219 NPT_Result Start() {
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220 return m_Delegate->Start();
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221 }
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222 NPT_Result Wait(NPT_Timeout timeout = NPT_TIMEOUT_INFINITE) {
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223 return m_Delegate->Wait(timeout);
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224 }
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225
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226 // NPT_Runnable methods
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227 virtual void Run() {}
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228
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229 // NPT_Interruptible methods
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230 virtual NPT_Result Interrupt() { return m_Delegate->Interrupt(); }
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231
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232 private:
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233 // members
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234 NPT_ThreadInterface* m_Delegate;
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235 };
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236
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237
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238 /*----------------------------------------------------------------------
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239 | NPT_ThreadCallbackReceiver
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240 +---------------------------------------------------------------------*/
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241 class NPT_ThreadCallbackReceiver
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242 {
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243 public:
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244 virtual ~NPT_ThreadCallbackReceiver() {}
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245 virtual void OnCallback(void* args) = 0;
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246 };
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247
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248 /*----------------------------------------------------------------------
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249 | NPT_ThreadCallbackSlot
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250 +---------------------------------------------------------------------*/
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251 class NPT_ThreadCallbackSlot
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252 {
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253 public:
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254 // types
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255 class NotificationHelper {
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256 public:
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257 virtual ~NotificationHelper() {};
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258 virtual void Notify(void) = 0;
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259 };
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260
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261 // constructor
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262 NPT_ThreadCallbackSlot();
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263
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264 // methods
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265 NPT_Result ReceiveCallback(NPT_ThreadCallbackReceiver& receiver, NPT_Timeout timeout = 0);
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266 NPT_Result SendCallback(void* args);
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267 NPT_Result SetNotificationHelper(NotificationHelper* helper);
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268 NPT_Result Shutdown();
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269
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270 protected:
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271 // members
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272 volatile void* m_CallbackArgs;
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273 volatile bool m_Shutdown;
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274 NPT_SharedVariable m_Pending;
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275 NPT_SharedVariable m_Ack;
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276 NPT_Mutex m_ReadLock;
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277 NPT_Mutex m_WriteLock;
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278 NotificationHelper* m_NotificationHelper;
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279 };
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280
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281 #endif // _NPT_THREADS_H_