40 lines
1.3 KiB
C++
Executable File
40 lines
1.3 KiB
C++
Executable File
/*****************************************************************************
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* *
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* S E M A P H O R E *
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* *
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*---------------------------------------------------------------------------*
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* Beschreibung: Implementierung von Sempahor-Objekten. *
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* *
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* Autor: Michael Schoettner, 2.9.2016 *
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*****************************************************************************/
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#ifndef __Semaphore_include__
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#define __Semaphore_include__
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#include "lib/Queue.h"
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#include "lib/SpinLock.h"
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class Semaphore {
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private:
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Semaphore(const Semaphore& copy) = delete; // Verhindere Kopieren
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// Queue fuer wartende Threads.
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Queue waitQueue;
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SpinLock lock;
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int counter;
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public:
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// Konstruktor: Initialisieren des Semaphorzaehlers
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Semaphore(int c) : counter(c) {}
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// 'Passieren': Warten auf das Freiwerden eines kritischen Abschnitts.
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void p();
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// 'Vreigeben': Freigeben des kritischen Abschnitts.
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void v();
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};
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#endif
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