/******************************************************************************** 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 X86_64_QATOMIC_H#define X86_64_QATOMIC_H#include <QtCore/qglobal.h>QT_BEGIN_HEADER#if defined(Q_CC_GNU) || defined(Q_CC_INTEL)inline int q_atomic_test_and_set_int(volatile int *ptr, int expected, int newval){    unsigned char ret;    asm volatile("lock cmpxchgl %2,%3\n"                 "sete %1\n"                 : "=a" (newval), "=qm" (ret)                 : "r" (newval), "m" (*ptr), "0" (expected)                 : "memory");    return static_cast<int>(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){    unsigned char ret;    asm volatile("lock cmpxchgq %2,%3\n"                 "sete %1\n"                 : "=a" (newval), "=qm" (ret)                 : "r" (newval), "m" (*reinterpret_cast<volatile long *>(ptr)), "0" (expected)                 : "memory");    return static_cast<int>(ret);}inline int q_atomic_increment(volatile int *ptr){    unsigned char ret;    asm volatile("lock incl %0\n"                 "setne %1"                 : "=m" (*ptr), "=qm" (ret)                 : "m" (*ptr)                 : "memory");    return static_cast<int>(ret);}inline int q_atomic_decrement(volatile int *ptr){    unsigned char ret;    asm volatile("lock decl %0\n"                 "setne %1"                 : "=m" (*ptr), "=qm" (ret)                 : "m" (*ptr)                 : "memory");    return static_cast<int>(ret);}inline int q_atomic_set_int(volatile int *ptr, int newval){    asm volatile("xchgl %0,%1"                 : "=r" (newval)                 : "m" (*ptr), "0" (newval)                 : "memory");    return newval;}inline void *q_atomic_set_ptr(volatile void *ptr, void *newval){    asm volatile("xchgq %0,%1"                 : "=r" (newval)                 : "m" (*reinterpret_cast<volatile long *>(ptr)), "0" (newval)                 : "memory");    return newval;}#elseextern "C" {    int q_atomic_test_and_set_int(volatile int *ptr, int expected, int newval);    int q_atomic_test_and_set_ptr(volatile void *ptr, void *expected, void *newval);} // extern "C"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_increment(volatile int *ptr){    int expected;    forever {        expected = *ptr;        if (q_atomic_test_and_set_int(ptr, expected, expected + 1))            break;    }    return expected != -1;}inline int q_atomic_decrement(volatile int *ptr){    int expected;    forever {        expected = *ptr;        if (q_atomic_test_and_set_int(ptr, expected, expected - 1))            break;    }    return expected != 1;}inline int q_atomic_set_int(volatile int *ptr, int newval){    int expected;    forever {        expected = *ptr;        if (q_atomic_test_and_set_int(ptr, expected, newval))            break;    }    return expected;}inline void *q_atomic_set_ptr(volatile void *ptr, void *newval){    void *expected;    forever {        expected = *reinterpret_cast<void * volatile *>(ptr);        if (q_atomic_test_and_set_ptr(ptr, expected, newval))            break;    }    return expected;}#endifQT_END_HEADER#endif // X86_64_QATOMIC_H