61 lines
2.1 KiB
C++
61 lines
2.1 KiB
C++
// Filename: atomicAdjustI386Impl.h
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// Created by: drose (01Apr06)
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//
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////////////////////////////////////////////////////////////////////
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//
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// PANDA 3D SOFTWARE
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// Copyright (c) Carnegie Mellon University. All rights reserved.
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//
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// All use of this software is subject to the terms of the revised BSD
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// license. You should have received a copy of this license along
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// with this source code in a file named "LICENSE."
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//
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////////////////////////////////////////////////////////////////////
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#ifndef ATOMICADJUSTI386IMPL_H
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#define ATOMICADJUSTI386IMPL_H
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#include "dtoolbase.h"
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#include "selectThreadImpl.h"
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#if defined(__i386__) || defined(_M_IX86)
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#include "numeric_types.h"
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////////////////////////////////////////////////////////////////////
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// Class : AtomicAdjustI386Impl
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// Description : Uses assembly-language calls to atomically increment
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// and decrement. Although this class is named i386, it
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// actually uses instructions that are specific to 486
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// and higher.
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////////////////////////////////////////////////////////////////////
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class EXPCL_DTOOL AtomicAdjustI386Impl {
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public:
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typedef ALIGN_4BYTE PN_int32 Integer;
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typedef void *UnalignedPointer;
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typedef ALIGN_4BYTE UnalignedPointer Pointer;
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INLINE static void inc(TVOLATILE Integer &var);
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INLINE static bool dec(TVOLATILE Integer &var);
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INLINE static void add(TVOLATILE Integer &var, Integer delta);
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INLINE static Integer set(TVOLATILE Integer &var, Integer new_value);
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INLINE static Integer get(const TVOLATILE Integer &var);
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INLINE static Pointer set_ptr(TVOLATILE Pointer &var, Pointer new_value);
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INLINE static Pointer get_ptr(const TVOLATILE Pointer &var);
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INLINE static Integer compare_and_exchange(TVOLATILE Integer &mem,
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Integer old_value,
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Integer new_value);
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INLINE static Pointer compare_and_exchange_ptr(TVOLATILE Pointer &mem,
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Pointer old_value,
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Pointer new_value);
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};
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#include "atomicAdjustI386Impl.I"
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#endif // __i386__
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#endif
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