152 lines
3.9 KiB
C++
152 lines
3.9 KiB
C++
/*
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* This file is a part of TTCalc - a mathematical calculator
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* and is distributed under the (new) BSD licence.
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* Author: Tomasz Sowa <t.sowa@ttmath.org>
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*/
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/*
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* Copyright (c) 2006-2008, Tomasz Sowa
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name Tomasz Sowa nor the names of contributors to this
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* project may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "threadcontroller.h"
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#include <cstdio>
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ThreadController::ThreadController()
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{
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calculations = 0;
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ready_for_stop = 0;
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exit_thread = false;
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}
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ThreadController::~ThreadController()
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{
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if(calculations) CloseHandle(calculations);
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if(ready_for_stop) CloseHandle(ready_for_stop);
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}
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bool ThreadController::Init() volatile
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{
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char * buffer = new char[300];
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// with 'GetTickCount()' we're generating an unique identifier of our event
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// (there can be another window of ttcalc)
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sprintf((char*)buffer,"TTCalcEventForManagingThreads9928%u",
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(unsigned int)GetTickCount());
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// 'calculations' will be for auto-reseting and initialized as non-signaled
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if( (calculations = CreateEvent(0,false,false,(char*)buffer))==NULL)
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{
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delete [] buffer;
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return false;
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}
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sprintf((char*)buffer,"TTCalcEventReadyForStop5567%u",
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(unsigned int)GetTickCount());
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// 'ready_for_stop' will be for manual-reseting and initialized as signaled
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// 'manual-reset' means that we must call ResetEvent() function (from WinAPI)
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// to manually reset the state to nonsignaled
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if( (ready_for_stop = CreateEvent(0,true,true,(char*)buffer))==NULL)
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{
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delete [] buffer;
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return false;
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}
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delete [] buffer;
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return stop_calculating.Init();
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}
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void ThreadController::ReadyForStop() volatile
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{
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SetEvent( ready_for_stop );
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}
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void ThreadController::StopCalculatingAndExitThread() volatile
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{
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WaitForSingleObject(ready_for_stop,INFINITE);
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stop_calculating.Stop();
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exit_thread = true;
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SetEvent(calculations);
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}
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void ThreadController::StopCalculating() volatile
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{
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WaitForSingleObject(ready_for_stop, INFINITE);
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stop_calculating.Stop();
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}
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void ThreadController::StartCalculating() volatile
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{
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SetEvent(calculations);
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}
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volatile bool ThreadController::WaitForCalculatingAndBlockForStop() volatile
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{
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WaitForSingleObject(calculations,INFINITE);
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ResetEvent(ready_for_stop);
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stop_calculating.Start();
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return !exit_thread;
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}
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const volatile ttmath::StopCalculating * ThreadController::GetStopObject() volatile const
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{
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return &stop_calculating;
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}
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bool ThreadController::WasStopSignal() volatile const
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{
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return stop_calculating.WasStopSignal();
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}
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// private
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ThreadController::ThreadController(const ThreadController &)
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{
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}
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