author | etisserant |
Tue, 17 Mar 2009 00:04:24 +0100 | |
changeset 540 | 6857b6ffb7a7 |
parent 458 | a3906286b09b |
permissions | -rwxr-xr-x |
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1 |
/* |
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This file is part of CanFestival, a library implementing CanOpen Stack. |
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|
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Copyright (C): Edouard TISSERANT and Francis DUPIN |
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Copyright (C) Win32 Port Leonid Tochinski |
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6 |
|
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See COPYING file for copyrights details. |
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8 |
|
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This library is free software; you can redistribute it and/or |
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10 |
modify it under the terms of the GNU Lesser General Public |
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License as published by the Free Software Foundation; either |
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version 2.1 of the License, or (at your option) any later version. |
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|
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This library is distributed in the hope that it will be useful, |
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15 |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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Lesser General Public License for more details. |
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|
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You should have received a copy of the GNU Lesser General Public |
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License along with this library; if not, write to the Free Software |
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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#include <windows.h> |
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#include <stdlib.h> |
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|
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extern "C" |
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{ |
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#include "applicfg.h" |
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#include "can_driver.h" |
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#include "timer.h" |
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#include "timers_driver.h" |
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}; |
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// --------------- Synchronization Object Implementation --------------- |
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class ccritical_section |
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{ |
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public: |
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ccritical_section() |
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{ |
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::InitializeCriticalSection(&m_cs); |
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} |
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~ccritical_section() |
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{ |
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::DeleteCriticalSection(&m_cs); |
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} |
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void enter() |
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{ |
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::EnterCriticalSection(&m_cs); |
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} |
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void leave() |
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{ |
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::LeaveCriticalSection(&m_cs); |
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} |
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private: |
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CRITICAL_SECTION m_cs; |
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}; |
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static ccritical_section g_cs; |
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void EnterMutex(void) |
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{ |
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g_cs.enter(); |
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} |
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void LeaveMutex(void) |
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{ |
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g_cs.leave(); |
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} |
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// --------------- Synchronization Object Implementation --------------- |
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// --------------- CAN Receive Thread Implementation --------------- |
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void CreateReceiveTask(CAN_HANDLE fd0, TASK_HANDLE* Thread, void* ReceiveLoopPtr) |
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{ |
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unsigned long thread_id = 0; |
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*Thread = ::CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)ReceiveLoopPtr, fd0, 0, &thread_id); |
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} |
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void WaitReceiveTaskEnd(TASK_HANDLE *Thread) |
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{ |
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::WaitForSingleObject(*Thread, INFINITE); |
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::CloseHandle(*Thread); |
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//*Thread = NULL; |
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} |
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// --------------- CAN Receive Thread Implementation --------------- |
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// --------------- Timer Thread Implementation --------------- |
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class class_timers |
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{ |
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public: |
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class_timers(); |
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~class_timers(); |
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void start_timer_thread(); |
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void resume_timer_thread(); |
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void stop_timer_thread(); |
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void set_timer(TIMEVAL value); |
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TIMEVAL get_elapsed_time(); |
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private: |
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TIMEVAL get_timer() const; |
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static DWORD WINAPI timer_loop_thread_proc(void* arg); |
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private: |
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TIMEVAL m_last_occured_alarm_time; |
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volatile TIMEVAL m_last_alarm_set_time; |
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HANDLE m_timer_thread; |
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volatile bool m_continue_timer_loop; |
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bool m_use_hi_res_timer; |
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double m_counts_per_usec; |
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}; |
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class_timers::class_timers() : m_last_occured_alarm_time(TIMEVAL_MAX), |
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m_last_alarm_set_time(TIMEVAL_MAX), |
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m_timer_thread(0), |
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m_continue_timer_loop(false), |
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m_use_hi_res_timer(false), |
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m_counts_per_usec(0.) |
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{ |
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// initialize hi resolution timer |
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LARGE_INTEGER counts_per_sec = {0, 0}; |
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if (::QueryPerformanceFrequency(&counts_per_sec) && counts_per_sec.QuadPart > 0) |
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{ |
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m_use_hi_res_timer = true; |
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m_counts_per_usec = counts_per_sec.QuadPart / 1000000.; |
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} |
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m_use_hi_res_timer = true; |
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} |
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132 |
|
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133 |
class_timers::~class_timers() |
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134 |
{ |
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135 |
stop_timer_thread(); |
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136 |
} |
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137 |
|
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138 |
// time is in micro seconds |
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139 |
TIMEVAL class_timers::get_timer() const |
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140 |
{ |
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141 |
if (m_use_hi_res_timer) |
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142 |
{ |
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143 |
LARGE_INTEGER performance_count = {0, 0}; |
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144 |
::QueryPerformanceCounter(&performance_count); |
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return (TIMEVAL)(performance_count.QuadPart / m_counts_per_usec); |
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146 |
} |
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// hi-res timer is unavailable |
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return 1000 * ::GetTickCount(); |
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149 |
} |
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150 |
|
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151 |
DWORD WINAPI class_timers::timer_loop_thread_proc(void* arg) |
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152 |
{ |
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class_timers* This = reinterpret_cast<class_timers*>(arg); |
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while (This->m_continue_timer_loop) |
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155 |
{ |
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TIMEVAL cur_time = This->get_timer(); |
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if (cur_time >= This->m_last_alarm_set_time) |
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158 |
{ |
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This->m_last_occured_alarm_time = cur_time; |
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This->m_last_alarm_set_time = TIMEVAL_MAX; |
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EnterMutex(); |
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TimeDispatch(); |
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LeaveMutex(); |
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} |
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165 |
else |
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166 |
{ |
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::Sleep(1); |
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168 |
} |
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169 |
} |
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return 0; |
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171 |
} |
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172 |
|
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void class_timers::start_timer_thread() |
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174 |
{ |
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if (m_timer_thread == 0) |
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176 |
{ |
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unsigned long thread_id = 0; |
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m_timer_thread = ::CreateThread(NULL, 0, &timer_loop_thread_proc, this, CREATE_SUSPENDED, &thread_id); |
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m_last_alarm_set_time = TIMEVAL_MAX; |
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180 |
m_last_occured_alarm_time = get_timer(); |
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181 |
} |
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182 |
} |
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183 |
|
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184 |
void class_timers::resume_timer_thread() |
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185 |
{ |
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186 |
if (m_timer_thread) |
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187 |
{ |
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188 |
m_continue_timer_loop = true; |
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189 |
::ResumeThread(m_timer_thread); |
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190 |
} |
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191 |
} |
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192 |
|
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193 |
void class_timers::stop_timer_thread() |
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194 |
{ |
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195 |
if (m_timer_thread) |
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196 |
{ |
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197 |
m_continue_timer_loop = false; |
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198 |
::WaitForSingleObject(m_timer_thread, INFINITE); |
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199 |
::CloseHandle(m_timer_thread); |
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200 |
m_timer_thread = 0; |
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201 |
} |
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202 |
} |
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|
203 |
|
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204 |
void class_timers::set_timer(TIMEVAL value) |
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205 |
{ |
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206 |
m_last_alarm_set_time = (value == TIMEVAL_MAX) ? TIMEVAL_MAX : get_timer() + value; |
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207 |
} |
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|
208 |
|
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209 |
// elapsed time since last occured alarm |
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210 |
TIMEVAL class_timers::get_elapsed_time() |
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211 |
{ |
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212 |
return get_timer() - m_last_occured_alarm_time; |
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213 |
} |
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|
214 |
|
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215 |
// ---------------------------------------------------------- |
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216 |
|
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217 |
static class_timers s_timers; |
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|
218 |
|
458
a3906286b09b
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greg
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406
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|
219 |
void TimerCleanup(void) |
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220 |
{ |
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406
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|
221 |
/* only used in realtime apps */ |
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406
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|
222 |
} |
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greg
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406
diff
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|
223 |
|
267
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|
224 |
void StartTimerLoop(TimerCallback_t init_callback) |
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225 |
{ |
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|
226 |
s_timers.start_timer_thread(); |
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227 |
// At first, TimeDispatch will call init_callback. |
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228 |
if (init_callback != NULL) |
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|
229 |
SetAlarm(NULL, 0, init_callback, (TIMEVAL)0, (TIMEVAL)0); |
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|
230 |
s_timers.resume_timer_thread(); |
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|
231 |
} |
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|
232 |
|
458
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406
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|
233 |
void StopTimerLoop(TimerCallback_t init_callback) |
267
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234 |
{ |
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|
235 |
s_timers.stop_timer_thread(); |
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|
236 |
} |
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|
237 |
|
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|
238 |
void setTimer(TIMEVAL value) |
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|
239 |
{ |
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|
240 |
s_timers.set_timer(value); |
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|
241 |
} |
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|
242 |
|
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|
243 |
TIMEVAL getElapsedTime(void) |
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|
244 |
{ |
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|
245 |
return s_timers.get_elapsed_time(); |
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|
246 |
} |