58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
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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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* @file atomicAdjustI386Impl.h
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* @author drose
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* @date 2006-04-01
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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)) && !defined(__APPLE__) && !defined(__ANDROID__)
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#include "numeric_types.h"
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/**
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* Uses assembly-language calls to atomically increment and decrement.
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* Although this class is named i386, it actually uses instructions that are
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* specific to 486 and higher.
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*/
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class EXPCL_DTOOL_DTOOLBASE AtomicAdjustI386Impl {
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public:
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typedef ALIGN_4BYTE int32_t 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 Integer 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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