/******************************************************************************** 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 ARM_QATOMIC_H#define ARM_QATOMIC_H#include <QtCore/qglobal.h>QT_BEGIN_HEADERextern Q_CORE_EXPORT char q_atomic_lock;inline char q_atomic_swp(volatile char *ptr, char newval){    register int ret;    asm volatile("swpb %0,%1,[%2]"                 : "=&r"(ret)                 : "r"(newval), "r"(ptr)                 : "cc", "memory");    return ret;}inline int q_atomic_test_and_set_int(volatile int *ptr, int expected, int newval){    int ret = 0;    while (q_atomic_swp(&q_atomic_lock, ~0) != 0);    if (*ptr == expected) {	*ptr = newval;	ret = 1;    }    q_atomic_swp(&q_atomic_lock, 0);    return ret;}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 *ptr, void *expected, void *newval){    int ret = 0;    while (q_atomic_swp(&q_atomic_lock, ~0) != 0) ;    if (*reinterpret_cast<void * volatile *>(ptr) == expected) {	*reinterpret_cast<void * volatile *>(ptr) = newval;	ret = 1;    }    q_atomic_swp(&q_atomic_lock, 0);    return ret;}inline int q_atomic_increment(volatile int *ptr){    while (q_atomic_swp(&q_atomic_lock, ~0) != 0) ;    int originalValue = *ptr;    *ptr = originalValue + 1;    q_atomic_swp(&q_atomic_lock, 0);    return originalValue != -1;}inline int q_atomic_decrement(volatile int *ptr){    while (q_atomic_swp(&q_atomic_lock, ~0) != 0) ;    int originalValue = *ptr;    *ptr = originalValue - 1;    q_atomic_swp(&q_atomic_lock, 0);    return originalValue != 1;}inline int q_atomic_set_int(volatile int *ptr, int newval){    while (q_atomic_swp(&q_atomic_lock, ~0) != 0) ;    int originalValue = *ptr;    *ptr = newval;    q_atomic_swp(&q_atomic_lock, 0);    return originalValue;}inline void *q_atomic_set_ptr(volatile void *ptr, void *newval){    while (q_atomic_swp(&q_atomic_lock, ~0) != 0) ;    void *originalValue = *reinterpret_cast<void * volatile *>(ptr);    *reinterpret_cast<void * volatile *>(ptr) = newval;    q_atomic_swp(&q_atomic_lock, 0);    return originalValue;}QT_END_HEADER#endif // ARM_QATOMIC_H