/******************************************************************************** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.**** This file is part of the QtCore module of the Qt Toolkit.**** This file may be used under the terms of the GNU General Public** License version 2.0 as published by the Free Software Foundation** and appearing in the file LICENSE.GPL included in the packaging of** this file.  Please review the following information to ensure GNU** General Public Licensing requirements will be met:** http://www.trolltech.com/products/qt/opensource.html**** If you are unsure which license is appropriate for your use, please** review the following information:** http://www.trolltech.com/products/qt/licensing.html or contact the** sales department at sales@trolltech.com.**** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.******************************************************************************/#ifndef BOUNDSCHECKER_QATOMIC_H#define BOUNDSCHECKER_QATOMIC_H#include <QtCore/qglobal.h>QT_BEGIN_HEADER__forceinline int q_atomic_xchg(int newval){    static int lockvar = 0;    int *pointer = &lockvar;    __asm {        mov EDX,pointer        mov ECX,newval        xchg dword ptr[EDX],ECX        mov newval,ECX    }    return newval;}inline void q_atomic_lock(){    while (q_atomic_xchg(~0) != 0)        ;}inline void q_atomic_unlock(){    q_atomic_xchg(0);}inline int q_atomic_test_and_set_int(volatile int *pointer, int expected, int newval){    q_atomic_lock();    if (*pointer == expected) {        *pointer = newval;        q_atomic_unlock();        return 1;    }    q_atomic_unlock();    return 0;}inline int q_atomic_test_and_set_acquire_int(volatile int *ptr, int expected, int newval){    return q_atomic_test_and_set_int(ptr, expected, newval);}inline int q_atomic_test_and_set_release_int(volatile int *ptr, int expected, int newval){    return q_atomic_test_and_set_int(ptr, expected, newval);}inline int q_atomic_test_and_set_ptr(volatile void *pointer, void *expected, void *newval){    q_atomic_lock();    if (*reinterpret_cast<void * volatile *>(pointer) == expected) {        *reinterpret_cast<void * volatile *>(pointer) = newval;        q_atomic_unlock();        return 1;    }    q_atomic_unlock();    return 0;}inline int q_atomic_increment(volatile int *pointer){    q_atomic_lock();    int ret = ++(*pointer);    q_atomic_unlock();    return ret;}inline int q_atomic_decrement(volatile int *pointer){    q_atomic_lock();    int ret = --(*pointer);    q_atomic_unlock();    return ret;}inline int q_atomic_set_int(volatile int *pointer, int newval){    q_atomic_lock();    int ret = *pointer;    *pointer = newval;    q_atomic_unlock();    return ret;}inline void *q_atomic_set_ptr(volatile void *pointer, void *newval){    q_atomic_lock();    void *ret = *reinterpret_cast<void * volatile *>(pointer);    *reinterpret_cast<void * volatile *>(pointer) = newval;    q_atomic_unlock();    return ret;}QT_END_HEADER#endif // BOUNDSCHECKER_QATOMIC_H