64 lines
2.1 KiB
C++
64 lines
2.1 KiB
C++
// Filename: atomicAdjustPosixImpl.h
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// Created by: drose (10Feb06)
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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 ATOMICADJUSTPOSIXIMPL_H
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#define ATOMICADJUSTPOSIXIMPL_H
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#include "dtoolbase.h"
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#include "selectThreadImpl.h"
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#ifdef HAVE_POSIX_THREADS
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#include "numeric_types.h"
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#include <pthread.h>
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////////////////////////////////////////////////////////////////////
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// Class : AtomicAdjustPosixImpl
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// Description : Uses POSIX to implement atomic adjustments.
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////////////////////////////////////////////////////////////////////
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class EXPCL_DTOOL AtomicAdjustPosixImpl {
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public:
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// In Posix, "long" is generally the native word size (32- or
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// 64-bit), which is what we'd prefer.
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typedef long Integer;
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typedef void *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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private:
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static pthread_mutex_t _mutex;
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};
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#include "atomicAdjustPosixImpl.I"
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#endif // HAVE_POSIX_THREADS
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#endif
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