xsatomicint.h

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/* +---------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)               |
   |                          http://www.mrpt.org/                             |
   |                                                                           |
   | Copyright (c) 2005-2017, Individual contributors, see AUTHORS file        |
   | See: http://www.mrpt.org/Authors - All rights reserved.                   |
   | Released under BSD License. See details in http://www.mrpt.org/License    |
   +---------------------------------------------------------------------------+ */
#ifndef XSATOMICINT_H
#define XSATOMICINT_H

#include "xstypesconfig.h"

#ifdef XSENS_64BIT
typedef long long XsAtomicIntValue;
#else
typedef long XsAtomicIntValue;
#endif
struct XsAtomicInt;
#ifndef __cplusplus
#define XSATOMICINT_INITIALIZER { 0 }
#endif

#ifdef _MSC_VER
#include <windows.h>
        #ifdef XSENS_64BIT
                #define atomicIncrement(a)      InterlockedIncrement64(&a)
                #define atomicDecrement(a)      InterlockedDecrement64(&a)
        #else
                #define atomicIncrement(a)      InterlockedIncrement(&a)
                #define atomicDecrement(a)      InterlockedDecrement(&a)
        #endif
#else
        #ifdef XSENS_64BIT
                #define atomicIncrement(a)      __sync_add_and_fetch(&a, 1)
                #define atomicDecrement(a)      __sync_sub_and_fetch(&a, 1)
        #else
                #define atomicIncrement(a)      (++a)
                #define atomicDecrement(a)      (--a)
        #endif
#endif

/*! \relates XsAtomicInt \brief Increase the value by one unit (prefix notation). */
#define XsAtomicInt_preIncrement(a) ((XsAtomicIntValue) atomicIncrement((a)->m_value))

/*! \relates XsAtomicInt \brief Decrease the value by one unit (prefix notation). */
#define XsAtomicInt_preDecrement(a) ((XsAtomicIntValue) atomicDecrement((a)->m_value))

/*! \relates XsAtomicInt \brief Increase the value by one unit (postfix notation). */
#define XsAtomicInt_postIncrement(a) ((XsAtomicIntValue) atomicIncrement((a)->m_value) - 1)

/*! \relates XsAtomicInt \brief Decrease the value by one unit (postfix notation). */
#define XsAtomicInt_postDecrement(a) ((XsAtomicIntValue) atomicDecrement((a)->m_value) + 1)

/*!     \class XsAtomicInt
        \brief Wrapper class for easy use of XsAtomicIntValue values
*/
struct XsAtomicInt {
        volatile XsAtomicIntValue m_value;                              //!< The actual value

#ifdef __cplusplus
        /*! \brief Initialize the value. */
        XsAtomicInt(XsAtomicIntValue val = 0)
                : m_value(val)
        {}

        /*! \brief Set the value to the given \a val. */
        inline void setValue(XsAtomicIntValue val)
        {
                m_value = val;
        }

        /*! \brief Get the current value. */
        inline XsAtomicIntValue value() const
        {
                return (XsAtomicIntValue) m_value;
        }

        /*! \brief Increase the value by one unit (prefix). */
        inline XsAtomicIntValue operator++()
        {
                return XsAtomicInt_preIncrement(this);
        }

        /*! \brief Decrease the value by one unit (prefix). */
        inline XsAtomicIntValue operator--()
        {
                return XsAtomicInt_preDecrement(this);
        }

        /*! \brief Increase the value by one unit (postfix). */
        inline XsAtomicIntValue operator++(int)
        {
                return XsAtomicInt_postIncrement(this);
        }

        /*! \brief Decrease the value by one unit (postfix). */
        inline XsAtomicIntValue operator--(int)
        {
                return XsAtomicInt_postDecrement(this);
        }

#endif  // __cplusplus
};

typedef struct XsAtomicInt XsAtomicInt;

#endif  // file guard