historical/toontown-classic.git/panda/include/atomicAdjustI386Impl.h
2024-01-16 11:20:27 -06:00

57 lines
1.8 KiB
C++

/**
* PANDA 3D SOFTWARE
* Copyright (c) Carnegie Mellon University. All rights reserved.
*
* All use of this software is subject to the terms of the revised BSD
* license. You should have received a copy of this license along
* with this source code in a file named "LICENSE."
*
* @file atomicAdjustI386Impl.h
* @author drose
* @date 2006-04-01
*/
#ifndef ATOMICADJUSTI386IMPL_H
#define ATOMICADJUSTI386IMPL_H
#include "dtoolbase.h"
#include "selectThreadImpl.h"
#if (defined(__i386__) || defined(_M_IX86)) && !defined(__APPLE__) && !defined(__ANDROID__)
#include "numeric_types.h"
/**
* Uses assembly-language calls to atomically increment and decrement.
* Although this class is named i386, it actually uses instructions that are
* specific to 486 and higher.
*/
class EXPCL_DTOOL_DTOOLBASE AtomicAdjustI386Impl {
public:
typedef ALIGN_4BYTE int32_t Integer;
typedef void *UnalignedPointer;
typedef ALIGN_4BYTE UnalignedPointer Pointer;
INLINE static void inc(TVOLATILE Integer &var);
INLINE static bool dec(TVOLATILE Integer &var);
INLINE static Integer add(TVOLATILE Integer &var, Integer delta);
INLINE static Integer set(TVOLATILE Integer &var, Integer new_value);
INLINE static Integer get(const TVOLATILE Integer &var);
INLINE static Pointer set_ptr(TVOLATILE Pointer &var, Pointer new_value);
INLINE static Pointer get_ptr(const TVOLATILE Pointer &var);
INLINE static Integer compare_and_exchange(TVOLATILE Integer &mem,
Integer old_value,
Integer new_value);
INLINE static Pointer compare_and_exchange_ptr(TVOLATILE Pointer &mem,
Pointer old_value,
Pointer new_value);
};
#include "atomicAdjustI386Impl.I"
#endif // __i386__
#endif