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sdrangel/sdrbase/util/spinlock.h

60 lines
2.1 KiB
C++

///////////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
// written by Christian Daniel //
// Copyright (C) 2016, 2018 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
// //
// This program is free software; you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation as version 3 of the License, or //
// (at your option) any later version. //
// //
// This program is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License V3 for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
///////////////////////////////////////////////////////////////////////////////////////
#ifndef INCLUDE_SPINLOCK_H
#define INCLUDE_SPINLOCK_H
#include <QAtomicInt>
#include "export.h"
class SDRBASE_API Spinlock {
public:
void lock()
{
while(!m_atomic.testAndSetAcquire(0, 1)) ;
}
void unlock()
{
while(!m_atomic.testAndSetRelease(1, 0)) ;
}
protected:
QAtomicInt m_atomic;
};
class SpinlockHolder {
public:
SpinlockHolder(Spinlock* spinlock) :
m_spinlock(spinlock)
{
m_spinlock->lock();
}
~SpinlockHolder()
{
m_spinlock->unlock();
}
protected:
Spinlock* m_spinlock;
};
#endif // INCLUDE_SPINLOCK_H