xsatomicint.h

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/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          http://www.mrpt.org/                          |
   |                                                                        |
   | Copyright (c) 2005-2018, 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
{
    /** The actual value */
    volatile XsAtomicIntValue m_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