atomic.h

Go to the documentation of this file.

/*
 * atMETEO - An ATmega based weather station
 * Copyright (C) 2014-2015 Christian Fetzer
 *
 * 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; either version 2 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 for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#pragma once

#include <inttypes.h>  // AVR toolchain doesn't offer cinttypes header

#include <avr/io.h>

namespace Avr
{

template<class TAtomicMode>
class AtomicGuard : private TAtomicMode
{
};

class AtomicForceOn
{
protected:
    AtomicForceOn() { cli(); }
    ~AtomicForceOn() { sei(); }
};

class AtomicRestoreState
{
protected:
    AtomicRestoreState() : m_SREG(SREG) { cli(); }
    ~AtomicRestoreState() { SREG = m_SREG; }

private:
    const uint8_t m_SREG;
};

template<class TNonAtomicMode>
class NonAtomicGuard : private TNonAtomicMode
{
};

class NonAtomicForceOff
{
protected:
    NonAtomicForceOff() { sei(); }
    ~NonAtomicForceOff() { cli(); }
};

class NonAtomicRestoreState
{
protected:
    NonAtomicRestoreState() : m_SREG(SREG) { sei(); }
    ~NonAtomicRestoreState() { SREG = m_SREG; }

private:
    const uint8_t m_SREG;
};
  // \addtogroup libtarget_atomic

}  // namespace Avr