/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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#ifndef _OSL_INTERLOCK_H_
#define _OSL_INTERLOCK_H_

#include "sal/config.h"

#include "sal/saldllapi.h"
#include "sal/types.h"

#ifdef __cplusplus
extern "C" {
#endif

typedef sal_Int32 oslInterlockedCount;

/** Increments the count variable addressed by pCount.
    @param pCount Address of count variable
    @return The adjusted value of the count variable.
*/
SAL_DLLPUBLIC oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* pCount);

/** Decrement the count variable addressed by pCount.
    @param pCount Address of count variable
    @return The adjusted value of the count variable.
*/
SAL_DLLPUBLIC oslInterlockedCount SAL_CALL osl_decrementInterlockedCount(oslInterlockedCount* pCount);


/// @cond INTERNAL

/** Increments the count variable addressed by p.

    @attention This functionality should only be used internally within
    LibreOffice.

    @param p Address of count variable
    @return The adjusted value of the count variable.

    @since LibreOffice 4.0
*/
#if defined( HAVE_GCC_BUILTIN_ATOMIC )
#    define osl_atomic_increment(p)  __sync_add_and_fetch((p), 1)
#else
#    define osl_atomic_increment(p) osl_incrementInterlockedCount((p))
#endif


/** Decrement the count variable addressed by p.

    @attention This functionality should only be used internally within
    LibreOffice.

    @param p Address of count variable
    @return The adjusted value of the count variable.

    @since LibreOffice 4.0
*/
#if defined( HAVE_GCC_BUILTIN_ATOMIC )
#    define osl_atomic_decrement(p) __sync_sub_and_fetch((p), 1)
#else
#    define osl_atomic_decrement(p) osl_decrementInterlockedCount((p))
#endif

/// @endcond

#ifdef __cplusplus
}
#endif


#endif  /* _OSL_INTERLOCK_H_ */


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