/****************************************************************************
**
** Copyright (C) 1992-2004 Trolltech AS. All rights reserved.
**
** This file is part of the core module of the Qt Toolkit.
**
** Licensees holding valid Qt Preview licenses may use this file in
** accordance with the Qt Preview License Agreement provided with the
** Software.
**
** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
** information about Qt Commercial License Agreements.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include "arch/qatomic.h"

extern "C" {

    int q_atomic_test_and_set_int(volatile int *pointer, int expected, int newval)
    {
        __asm {
            mov EBX,pointer
                mov EAX,expected
                mov ECX,newval
                lock cmpxchg dword ptr[EBX],ECX
                mov EAX,0
                sete AL
                mov newval,EAX
                }
        return newval;
    }

    int q_atomic_test_and_set_ptr(void * volatile *pointer, void *expected, void *newval)
    {
        return q_atomic_test_and_set_int(reinterpret_cast<volatile int *>(pointer),
                                         reinterpret_cast<int>(expected),
                                         reinterpret_cast<int>(newval));
    }

} // extern "C"
