author | rubidium |
Sun, 25 May 2008 19:17:03 +0000 | |
changeset 9354 | 845e07db4549 |
parent 8934 | f46812d21fe6 |
child 9476 | 902f9cf6373f |
permissions | -rw-r--r-- |
8934
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/* $Id$ */ |
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/** @file fiber_thread.cpp ThreadObject implementation of Fiber. */ |
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#include "stdafx.h" |
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#include "fiber.hpp" |
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#include "thread.h" |
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#include <stdlib.h> |
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class Fiber_Thread : public Fiber { |
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private: |
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ThreadObject *m_thread; |
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FiberFunc m_proc; |
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void *m_param; |
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bool m_attached; |
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ThreadSemaphore *m_sem; |
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bool m_kill; |
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static Fiber_Thread *s_current; |
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static Fiber_Thread *s_main; |
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public: |
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/** |
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* Create a ThreadObject fiber and start it, calling proc(param). |
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*/ |
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Fiber_Thread(FiberFunc proc, void *param) : |
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m_thread(NULL), |
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m_proc(proc), |
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m_param(param), |
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m_attached(false), |
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m_kill(false) |
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{ |
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this->m_sem = ThreadSemaphore::New(); |
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/* Create a thread and start stFiberProc */ |
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this->m_thread = ThreadObject::New(&stFiberProc, this); |
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} |
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/** |
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* Create a ThreadObject fiber and attach current thread to it. |
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*/ |
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Fiber_Thread(void *param) : |
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m_thread(NULL), |
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m_proc(NULL), |
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m_param(param), |
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m_attached(true), |
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m_kill(false) |
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{ |
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this->m_sem = ThreadSemaphore::New(); |
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/* Attach the current thread to this Fiber */ |
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this->m_thread = ThreadObject::AttachCurrent(); |
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/* We are the current thread */ |
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if (s_current == NULL) s_current = this; |
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if (s_main == NULL) s_main = this; |
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} |
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~Fiber_Thread() |
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{ |
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/* Remove the thread if needed */ |
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if (this->m_thread != NULL) { |
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assert(this->m_attached || !this->m_thread->IsRunning()); |
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delete this->m_thread; |
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} |
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/* Remove the semaphore */ |
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delete this->m_sem; |
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} |
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/* virtual */ void SwitchToFiber() |
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{ |
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/* You can't switch to yourself */ |
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assert(s_current != this); |
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Fiber_Thread *cur = s_current; |
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/* Continue the execution of 'this' Fiber */ |
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this->m_sem->Set(); |
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/* Hold the execution of the current Fiber */ |
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cur->m_sem->Wait(); |
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if (this->m_kill) { |
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/* If the thread we switched too was killed, join it so it can finish quiting */ |
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this->m_thread->Join(); |
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} |
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/* If we continue, we are the current thread */ |
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s_current = cur; |
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} |
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/* virtual */ void Exit() |
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{ |
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/* Kill off our thread */ |
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this->m_kill = true; |
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this->m_thread->Exit(); |
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} |
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/* virtual */ bool IsRunning() |
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{ |
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if (this->m_thread == NULL) return false; |
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return this->m_thread->IsRunning(); |
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} |
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/* virtual */ void *GetFiberData() |
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{ |
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return this->m_param; |
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} |
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static Fiber_Thread *GetCurrentFiber() |
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{ |
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return s_current; |
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} |
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private: |
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/** |
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* First function which is called within the fiber. |
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*/ |
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static void * CDECL stFiberProc(void *fiber) |
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{ |
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Fiber_Thread *cur = (Fiber_Thread *)fiber; |
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115 |
/* Now suspend the thread until we get SwitchToFiber() for the first time */ |
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116 |
cur->m_sem->Wait(); |
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117 |
/* If we continue, we are the current thread */ |
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118 |
s_current = cur; |
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119 |
|
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120 |
try { |
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121 |
cur->m_proc(cur->m_param); |
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122 |
} catch (...) { |
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123 |
/* Unlock the main thread */ |
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124 |
s_main->m_sem->Set(); |
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125 |
throw; |
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126 |
} |
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127 |
|
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128 |
return NULL; |
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129 |
} |
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130 |
}; |
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131 |
|
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132 |
/* Initialize the static member of Fiber_Thread */ |
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133 |
/* static */ Fiber_Thread *Fiber_Thread::s_current = NULL; |
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134 |
/* static */ Fiber_Thread *Fiber_Thread::s_main = NULL; |
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135 |
|
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136 |
#ifndef WIN32 |
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137 |
|
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138 |
/* static */ Fiber *Fiber::New(FiberFunc proc, void *param) |
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139 |
{ |
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140 |
return new Fiber_Thread(proc, param); |
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141 |
} |
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142 |
|
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143 |
/* static */ Fiber *Fiber::AttachCurrent(void *param) |
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144 |
{ |
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145 |
return new Fiber_Thread(param); |
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146 |
} |
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147 |
|
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148 |
/* static */ void *Fiber::GetCurrentFiberData() |
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149 |
{ |
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150 |
return Fiber_Thread::GetCurrentFiber()->GetFiberData(); |
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151 |
} |
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152 |
|
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153 |
#endif /* WIN32 */ |