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483 lines
15 KiB
483 lines
15 KiB
/* /////////////////////////////////////////////////////////////////////////
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* File: unixstl/synch/atomic_functions.h
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*
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* Purpose: UNIXSTL atomic functions.
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*
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* Created: 23rd October 1997
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* Updated: 29th April 2010
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*
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* Thanks: To Brad Cox, for helping out in testing and fixing the
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* implementation for MAC OSX (Intel).
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*
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* Home: http://stlsoft.org/
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*
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* Copyright (c) 1997-2010, Matthew Wilson and Synesis Software
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name(s) of Matthew Wilson and Synesis Software nor the names of
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* any contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* ////////////////////////////////////////////////////////////////////// */
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/** \file unixstl/synch/atomic_functions.h
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*
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* \brief [C++ only] Definition of the atomic functions
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* (\ref group__library__synch "Synchronisation" Library).
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*/
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#ifndef UNIXSTL_INCL_UNIXSTL_SYNCH_H_ATOMIC_FUNCTIONS
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#define UNIXSTL_INCL_UNIXSTL_SYNCH_H_ATOMIC_FUNCTIONS
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#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
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# define UNIXSTL_VER_UNIXSTL_SYNCH_H_ATOMIC_FUNCTIONS_MAJOR 6
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# define UNIXSTL_VER_UNIXSTL_SYNCH_H_ATOMIC_FUNCTIONS_MINOR 1
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# define UNIXSTL_VER_UNIXSTL_SYNCH_H_ATOMIC_FUNCTIONS_REVISION 1
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# define UNIXSTL_VER_UNIXSTL_SYNCH_H_ATOMIC_FUNCTIONS_EDIT 201
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#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */
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/* /////////////////////////////////////////////////////////////////////////
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* Includes
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*/
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#ifndef UNIXSTL_INCL_UNIXSTL_H_UNIXSTL
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# include <unixstl/unixstl.h>
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#endif /* !UNIXSTL_INCL_UNIXSTL_H_UNIXSTL */
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#ifndef UNIXSTL_INCL_UNIXSTL_SYNCH_UTIL_H_FEATURES
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# include <unixstl/synch/util/features.h>
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#endif /* !UNIXSTL_INCL_UNIXSTL_SYNCH_UTIL_H_FEATURES */
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#ifndef UNIXSTL_INCL_UNIXSTL_SYNCH_H_ATOMIC_TYPES
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# include <unixstl/synch/atomic_types.h>
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#endif /* !UNIXSTL_INCL_UNIXSTL_SYNCH_H_ATOMIC_TYPES */
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#if defined(UNIXSTL_FORCE_ATOMIC_INTEGER_OPERATIONS)
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/* Nothing to include here; UNIXSTL_FORCED_ATOMIC_INTEGER_IMPLEMENTATIONS will be included inside unixstl namespace */
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#elif defined(UNIXSTL_ATOMIC_INTEGER_OPERATIONS_VIA_GCC_BUILTINS)
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/* Nothing to include, since using built-ins */
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#elif defined(UNIXSTL_ATOMIC_INTEGER_OPERATIONS_VIA_MACOSX)
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# include <libkern/OSAtomic.h>
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#elif defined(UNIXSTL_ATOMIC_INTEGER_OPERATIONS_VIA_WINDOWS_INTERLOCKED)
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# include <windows.h>
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#else
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# error Atomic integer operations not supported: see unixstl/synch/util/features.h for details
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#endif /* ? */
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/* /////////////////////////////////////////////////////////////////////////
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* Namespace
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*/
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#ifndef _UNIXSTL_NO_NAMESPACE
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# if defined(_STLSOFT_NO_NAMESPACE) || \
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defined(STLSOFT_DOCUMENTATION_SKIP_SECTION)
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/* There is no stlsoft namespace, so must define ::unixstl */
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namespace unixstl
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{
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# else
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/* Define stlsoft::unixstl_project */
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namespace stlsoft
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{
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namespace unixstl_project
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{
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# endif /* _STLSOFT_NO_NAMESPACE */
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#endif /* !_UNIXSTL_NO_NAMESPACE */
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/* /////////////////////////////////////////////////////////////////////////
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* Features
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*/
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#ifdef UNIXSTL_HAS_ATOMIC_PREINCREMENT
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# undef UNIXSTL_HAS_ATOMIC_PREINCREMENT
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#endif /* UNIXSTL_HAS_ATOMIC_PREINCREMENT */
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#ifdef UNIXSTL_HAS_ATOMIC_PREDECREMENT
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# undef UNIXSTL_HAS_ATOMIC_PREDECREMENT
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#endif /* UNIXSTL_HAS_ATOMIC_PREDECREMENT */
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#ifdef UNIXSTL_HAS_ATOMIC_POSTINCREMENT
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# undef UNIXSTL_HAS_ATOMIC_POSTINCREMENT
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#endif /* UNIXSTL_HAS_ATOMIC_POSTINCREMENT */
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#ifdef UNIXSTL_HAS_ATOMIC_POSTDECREMENT
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# undef UNIXSTL_HAS_ATOMIC_POSTDECREMENT
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#endif /* UNIXSTL_HAS_ATOMIC_POSTDECREMENT */
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#ifdef UNIXSTL_HAS_ATOMIC_INCREMENT
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# undef UNIXSTL_HAS_ATOMIC_INCREMENT
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#endif /* UNIXSTL_HAS_ATOMIC_INCREMENT */
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#ifdef UNIXSTL_HAS_ATOMIC_DECREMENT
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# undef UNIXSTL_HAS_ATOMIC_DECREMENT
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#endif /* UNIXSTL_HAS_ATOMIC_DECREMENT */
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#ifdef UNIXSTL_HAS_ATOMIC_READ
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# undef UNIXSTL_HAS_ATOMIC_READ
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#endif /* UNIXSTL_HAS_ATOMIC_READ */
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#ifdef UNIXSTL_HAS_ATOMIC_WRITE
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# undef UNIXSTL_HAS_ATOMIC_WRITE
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#endif /* UNIXSTL_HAS_ATOMIC_WRITE */
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#ifdef UNIXSTL_HAS_ATOMIC_PREADD
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# undef UNIXSTL_HAS_ATOMIC_PREADD
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#endif /* UNIXSTL_HAS_ATOMIC_PREADD */
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#ifdef UNIXSTL_HAS_ATOMIC_POSTADD
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# undef UNIXSTL_HAS_ATOMIC_POSTADD
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#endif /* UNIXSTL_HAS_ATOMIC_POSTADD */
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/* /////////////////////////////////////////////////////////////////////////
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* Functions
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*/
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#if defined(STLSOFT_DOCUMENTATION_SKIP_SECTION)
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/** \brief Indicates whether the atomic_preincrement function is defined
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* for the current compiler/operating-system/architecture
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*/
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# define UNIXSTL_HAS_ATOMIC_PREINCREMENT
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/** \brief Indicates whether the atomic_predecrement function is defined
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* for the current compiler/operating-system/architecture
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*/
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# define UNIXSTL_HAS_ATOMIC_PREDECREMENT
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/** \brief Indicates whether the atomic_postincrement function is defined
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* for the current compiler/operating-system/architecture
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*/
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# define UNIXSTL_HAS_ATOMIC_POSTINCREMENT
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/** \brief Indicates whether the atomic_postdecrement function is defined
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* for the current compiler/operating-system/architecture
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*/
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# define UNIXSTL_HAS_ATOMIC_POSTDECREMENT
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/** \brief Indicates whether the atomic_increment function is defined for
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* the current compiler/operating-system/architecture
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*/
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# define UNIXSTL_HAS_ATOMIC_INCREMENT
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/** \brief Indicates whether the atomic_decrement function is defined for
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* the current compiler/operating-system/architecture
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*/
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# define UNIXSTL_HAS_ATOMIC_DECREMENT
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/** \brief Indicates whether the atomic_read function is defined for the
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* current compiler/operating-system/architecture
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*/
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# define UNIXSTL_HAS_ATOMIC_READ
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/** \brief Indicates whether the atomic_write function is defined for the
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* current compiler/operating-system/architecture
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*/
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# define UNIXSTL_HAS_ATOMIC_WRITE
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/** \brief Indicates whether the atomic_preadd function is defined for the
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* current compiler/operating-system/architecture
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*/
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# define UNIXSTL_HAS_ATOMIC_PREADD
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/** \brief Indicates whether the atomic_postadd function is defined for the
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* current compiler/operating-system/architecture
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*/
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# define UNIXSTL_HAS_ATOMIC_POSTADD
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#elif defined(UNIXSTL_HAS_ATOMIC_INTEGER_OPERATIONS)
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# if defined(UNIXSTL_FORCE_ATOMIC_INTEGER_OPERATIONS)
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/* ************************************
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* Forced
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*/
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# ifndef UNIXSTL_FORCED_ATOMIC_INTEGER_IMPLEMENTATIONS
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# error If you are forcing atomic integer support (by defining UNIXSTL_FORCE_ATOMIC_INTEGER_OPERATIONS) you must also define UNIXSTL_FORCED_ATOMIC_INTEGER_IMPLEMENTATIONS as the header containing the atomic integer operations, which will be included
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# endif /* UNIXSTL_FORCED_ATOMIC_INTEGER_IMPLEMENTATIONS */
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# include UNIXSTL_FORCED_ATOMIC_INTEGER_IMPLEMENTATIONS
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# elif defined(UNIXSTL_ATOMIC_INTEGER_OPERATIONS_VIA_GCC_BUILTINS)
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/* ************************************
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* GCC builtins
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*/
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# error This feature is not yet supported, and you should not be seeing this compilation path unless unixstl/synch/util/features.h is out of synch with this file; contact Synesis Software
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# elif defined(UNIXSTL_ATOMIC_INTEGER_OPERATIONS_VIA_WINDOWS_INTERLOCKED)
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/* ************************************
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* Windows Interlocked
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*/
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# if !defined(UNIXSTL_NO_WIN32_NATIVE_ATOMIC_FUNCTIONS)
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STLSOFT_INLINE atomic_int_t atomic_preincrement(atomic_int_t volatile* pl)
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{
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return STLSOFT_NS_GLOBAL(InterlockedIncrement)((LPLONG)pl);
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}
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# define UNIXSTL_HAS_ATOMIC_PREINCREMENT
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STLSOFT_INLINE atomic_int_t atomic_predecrement(atomic_int_t volatile* pl)
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{
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return STLSOFT_NS_GLOBAL(InterlockedDecrement)((LPLONG)pl);
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}
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# define UNIXSTL_HAS_ATOMIC_PREDECREMENT
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STLSOFT_INLINE atomic_int_t atomic_postincrement(atomic_int_t volatile* pl)
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{
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atomic_int_t pre = *pl;
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STLSOFT_NS_GLOBAL(InterlockedIncrement)((LPLONG)pl);
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return pre;
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}
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# define UNIXSTL_HAS_ATOMIC_POSTINCREMENT
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STLSOFT_INLINE atomic_int_t atomic_postdecrement(atomic_int_t volatile* pl)
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{
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atomic_int_t pre = *pl;
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STLSOFT_NS_GLOBAL(InterlockedDecrement)((LPLONG)pl);
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return pre;
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}
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# define UNIXSTL_HAS_ATOMIC_POSTDECREMENT
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STLSOFT_INLINE void atomic_increment(atomic_int_t volatile* pl)
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{
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STLSOFT_NS_GLOBAL(InterlockedIncrement)((LPLONG)pl);
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}
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# define UNIXSTL_HAS_ATOMIC_INCREMENT
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STLSOFT_INLINE void atomic_decrement(atomic_int_t volatile* pl)
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{
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STLSOFT_NS_GLOBAL(InterlockedDecrement)((LPLONG)pl);
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}
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# define UNIXSTL_HAS_ATOMIC_DECREMENT
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# endif /* !UNIXSTL_NO_WIN32_NATIVE_ATOMIC_FUNCTIONS */
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/* NOTE: We allow atomic_write(), since on almost all platforms this'll be fine */
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STLSOFT_INLINE atomic_int_t atomic_write(atomic_int_t volatile* pv, atomic_int_t n)
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{
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return stlsoft_static_cast(atomic_int_t, STLSOFT_NS_GLOBAL(InterlockedExchange)(stlsoft_c_cast(LPLONG, pv), n));
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}
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# define UNIXSTL_HAS_ATOMIC_WRITE
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# if !defined(UNIXSTL_NO_WIN32_NATIVE_ATOMIC_FUNCTIONS)
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STLSOFT_INLINE atomic_int_t atomic_read(atomic_int_t volatile* pv)
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{
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return *pv;
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}
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# define UNIXSTL_HAS_ATOMIC_READ
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/* STLSOFT_INLINE */ atomic_int_t atomic_preadd(atomic_int_t volatile* pl, atomic_int_t n);
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STLSOFT_INLINE atomic_int_t atomic_postadd(atomic_int_t volatile* pl, atomic_int_t n)
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{
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return (atomic_int_t)STLSOFT_NS_GLOBAL(InterlockedExchangeAdd)((LPLONG)pl, n);
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}
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# define UNIXSTL_HAS_ATOMIC_POSTADD
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# endif /* !UNIXSTL_NO_WIN32_NATIVE_ATOMIC_FUNCTIONS */
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# elif defined(UNIXSTL_ATOMIC_INTEGER_OPERATIONS_VIA_MACOSX)
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/* ************************************
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* Mac OS-X
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*/
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/** \brief
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*
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* \ingroup group__library__synch
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*/
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STLSOFT_INLINE atomic_int_t atomic_preincrement(atomic_int_t volatile* pl)
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{
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return STLSOFT_NS_GLOBAL(OSAtomicIncrement32Barrier)(stlsoft_const_cast(atomic_int_t*, pl));
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}
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# define UNIXSTL_HAS_ATOMIC_PREINCREMENT
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/** \brief
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*
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* \ingroup group__library__synch
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*/
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STLSOFT_INLINE atomic_int_t atomic_predecrement(atomic_int_t volatile* pl)
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{
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return STLSOFT_NS_GLOBAL(OSAtomicDecrement32Barrier)(stlsoft_const_cast(atomic_int_t*, pl));
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}
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# define UNIXSTL_HAS_ATOMIC_PREDECREMENT
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/** \brief
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*
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* \ingroup group__library__synch
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*/
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STLSOFT_INLINE atomic_int_t atomic_postincrement(atomic_int_t volatile* pl)
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{
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return STLSOFT_NS_GLOBAL(OSAtomicIncrement32Barrier)(stlsoft_const_cast(atomic_int_t*, pl)) - 1;
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}
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# define UNIXSTL_HAS_ATOMIC_POSTINCREMENT
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/** \brief
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*
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* \ingroup group__library__synch
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*/
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STLSOFT_INLINE atomic_int_t atomic_postdecrement(atomic_int_t volatile* pl)
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{
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return STLSOFT_NS_GLOBAL(OSAtomicDecrement32Barrier)(stlsoft_const_cast(atomic_int_t*, pl)) + 1;
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}
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# define UNIXSTL_HAS_ATOMIC_POSTDECREMENT
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/** \brief
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*
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* \ingroup group__library__synch
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*/
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STLSOFT_INLINE void atomic_increment(atomic_int_t volatile* pl)
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{
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STLSOFT_NS_GLOBAL(OSAtomicIncrement32Barrier)(stlsoft_const_cast(atomic_int_t*, pl));
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}
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# define UNIXSTL_HAS_ATOMIC_INCREMENT
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/** \brief
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*
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* \ingroup group__library__synch
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*/
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STLSOFT_INLINE void atomic_decrement(atomic_int_t volatile* pl)
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{
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STLSOFT_NS_GLOBAL(OSAtomicDecrement32Barrier)(stlsoft_const_cast(atomic_int_t*, pl));
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}
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# define UNIXSTL_HAS_ATOMIC_DECREMENT
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/** \brief
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*
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* \ingroup group__library__synch
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*/
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/** \brief Note: atomic_write() for PowerPC is not yet defined. If you wish to suggest an
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* implementation, it will be most welcome.
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*
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* \ingroup group__library__synch
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*/
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/* STLSOFT_INLINE */ atomic_int_t atomic_write(atomic_int_t volatile* pv, atomic_int_t n);
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/** \brief
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*
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* \ingroup group__library__synch
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*/
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STLSOFT_INLINE atomic_int_t atomic_read(atomic_int_t volatile* pv)
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{
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STLSOFT_NS_GLOBAL(OSMemoryBarrier)();
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return *pv;
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}
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# define UNIXSTL_HAS_ATOMIC_READ
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/** \brief
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*
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* \ingroup group__library__synch
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*/
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STLSOFT_INLINE atomic_int_t atomic_preadd(atomic_int_t volatile* pl, atomic_int_t n)
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{
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return STLSOFT_NS_GLOBAL(OSAtomicAdd32Barrier)(n, stlsoft_const_cast(atomic_int_t*, pl));
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}
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# define UNIXSTL_HAS_ATOMIC_PREADD
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/** \brief
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*
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* \ingroup group__library__synch
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*/
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STLSOFT_INLINE atomic_int_t atomic_postadd(atomic_int_t volatile* pl, atomic_int_t n)
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{
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return STLSOFT_NS_GLOBAL(OSAtomicAdd32Barrier)(n, stlsoft_const_cast(atomic_int_t*, pl)) - n;
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}
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# define UNIXSTL_HAS_ATOMIC_POSTADD
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# else
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# error Atomic integer operations not supported: see unixstl/synch/util/features.h for details
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# endif /* ? */
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/* ////////////////////////////////////////////////////////////////////// */
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# if 0
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STLSOFT_INLINE atomic_int_t atomic_read(atomic_int_t volatile* pv);
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/* # define UNIXSTL_HAS_ATOMIC_READ */
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STLSOFT_INLINE atomic_int_t atomic_write(atomic_int_t volatile* pv, atomic_int_t n)
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{
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atomic_int_t oldval;
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/* Note: the "xchg" instruction does not need a "lock" prefix */
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# ifdef STLSOFT_COMPILER_IS_GCC
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__asm__ __volatile__( "xchgl %0, %1" /* long (32-bit) xchg, from */
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: "=r"(oldval), "=m"(*(pv))
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: "0"(n), "m"(*(pv))
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: "memory");
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# else /* ? compiler */
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_asm
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{
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mov ecx, dword ptr [pv]
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mov eax, n
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xchg dword ptr [ecx], eax
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mov oldval, eax
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}
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# endif /* compiler */
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return oldval;
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}
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#endif
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/* ////////////////////////////////////////////////////////////////////// */
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#endif /* UNIXSTL_HAS_ATOMIC_INTEGER_OPERATIONS */
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/* /////////////////////////////////////////////////////////////////////////
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* Unit-testing
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*/
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#ifdef STLSOFT_UNITTEST
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# include "./unittest/atomic_functions_unittest_.h"
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#endif /* STLSOFT_UNITTEST */
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|
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/* ////////////////////////////////////////////////////////////////////// */
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|
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#ifndef _UNIXSTL_NO_NAMESPACE
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# if defined(_STLSOFT_NO_NAMESPACE) || \
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defined(STLSOFT_DOCUMENTATION_SKIP_SECTION)
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} /* namespace unixstl */
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# else
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} /* namespace unixstl_project */
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} /* namespace stlsoft */
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# endif /* _STLSOFT_NO_NAMESPACE */
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#endif /* !_UNIXSTL_NO_NAMESPACE */
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/* ////////////////////////////////////////////////////////////////////// */
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#endif /* !UNIXSTL_INCL_UNIXSTL_SYNCH_H_ATOMIC_FUNCTIONS */
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/* ///////////////////////////// end of file //////////////////////////// */
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