changed version: 0.8.7 now git-svn-id: svn://ttmath.org/publicrep/ttcalc/branches/0.8.x@197 e52654a7-88a9-db11-a3e9-0013d4bc506e0.8.x 0.8.7
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/*
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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@slimaczek.pl>
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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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#ifndef headerfilestopcalculating
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#define headerfilestopcalculating
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/*!
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\file stopcalculating.h
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\brief it tells us whether there was a stop signal or not
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*/
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#include <ttmath/ttmathtypes.h>
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#include <windows.h>
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/*!
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\brief it tells us whether there was a stop signal or not
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we can pass a pointer to the object of this class to the certain
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calculating methods especially for the method which calculates the
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Factorial (1*2*3*4....), such methods as the Factorial takes a lot of time
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and sometimes we want to break the calculations for example when we've got
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a new input string
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those methods which take a lot of time check the object of type NewStopCalculating
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and if there was a stop signal they stop and return immediately without returning
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a correct result
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the stop signal can be caused by another thread in our case by the first (gui) thread
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there'll be only one object of this class
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(it'll be as an variable of ThreadController class)
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*/
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class NewStopCalculating : public ttmath::StopCalculating
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{
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public:
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/*!
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the constructor
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*/
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NewStopCalculating()
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{
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stop = 0;
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}
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/*!
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the destructor
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*/
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~NewStopCalculating()
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{
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if(stop) CloseHandle(stop);
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}
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/*!
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it initializes an object of this class
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this method will be called from Init() of the ThreadController object
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*/
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bool Init() volatile
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{
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char buffer[80];
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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(buffer,"TTCalcStopEventForStoppingCalculations7756%u",
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(unsigned int)GetTickCount());
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// 'stop' will be manual-reseted and initialized as non-signaled
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if( (stop = CreateEvent(0,true,false,buffer))==NULL)
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return false;
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return true;
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}
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/*!
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when we want to stop the calculations for example when the user changed somewhat
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we call the Stop() method from the first (gui) thread
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*/
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void Stop() volatile
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{
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SetEvent(stop);
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}
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/*!
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when we start the calculations we call this method
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(we call it from WaitForCalculatingAndBlockForStop() method of
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ThreadController class)
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*/
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void Start() volatile
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{
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ResetEvent(stop);
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}
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/*!
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it returns 'true' if there was a stop signal
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it's useful for the second thread and functions which take plenty of time
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for calculating, when this method returns 'true' those methods break the
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calculations and return without returning a correct value
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*/
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virtual bool WasStopSignal() const volatile
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{
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if( WaitForSingleObject(stop,0) == WAIT_OBJECT_0 )
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return true;
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return false;
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}
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private:
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// manual-reset, initialized as non-signaled
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HANDLE stop;
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};
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#endif
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/*
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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@slimaczek.pl>
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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,
|
||||
* 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"
|
||||
* 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
|
||||
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
* 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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#ifndef headerfilestopcalculating
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#define headerfilestopcalculating
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/*!
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\file stopcalculating.h
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\brief it tells us whether there was a stop signal or not
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*/
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#include <ttmath/ttmathtypes.h>
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#include <windows.h>
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/*!
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\brief it tells us whether there was a stop signal or not
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we can pass a pointer to the object of this class to the certain
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calculating methods especially for the method which calculates the
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Factorial (1*2*3*4....), such methods as the Factorial takes a lot of time
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and sometimes we want to break the calculations for example when we've got
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a new input string
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those methods which take a lot of time check the object of type NewStopCalculating
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and if there was a stop signal they stop and return immediately without returning
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a correct result
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the stop signal can be caused by another thread in our case by the first (gui) thread
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there'll be only one object of this class
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(it'll be as an variable of ThreadController class)
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*/
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class NewStopCalculating : public ttmath::StopCalculating
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{
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public:
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/*!
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the constructor
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*/
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NewStopCalculating()
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{
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stop = 0;
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}
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/*!
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the destructor
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*/
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~NewStopCalculating()
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{
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if(stop) CloseHandle(stop);
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}
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/*!
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it initializes an object of this class
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this method will be called from Init() of the ThreadController object
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*/
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bool Init() volatile
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{
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char buffer[80];
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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(buffer,"TTCalcStopEventForStoppingCalculations7756%u",
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(unsigned int)GetTickCount());
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// 'stop' will be manual-reseted and initialized as non-signaled
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if( (stop = CreateEvent(0,true,false,buffer))==NULL)
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return false;
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return true;
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}
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/*!
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when we want to stop the calculations for example when the user changed somewhat
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we call the Stop() method from the first (gui) thread
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*/
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void Stop() volatile
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{
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SetEvent(stop);
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}
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/*!
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when we start the calculations we call this method
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(we call it from WaitForCalculatingAndBlockForStop() method of
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ThreadController class)
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*/
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void Start() volatile
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{
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ResetEvent(stop);
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}
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/*!
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it returns 'true' if there was a stop signal
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it's useful for the second thread and functions which take plenty of time
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for calculating, when this method returns 'true' those methods break the
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calculations and return without returning a correct value
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*/
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virtual bool WasStopSignal() const volatile
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{
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if( WaitForSingleObject(stop,0) == WAIT_OBJECT_0 )
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return true;
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return false;
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}
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private:
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// manual-reset, initialized as non-signaled
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HANDLE stop;
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};
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#endif
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