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198 lines
7.0 KiB
198 lines
7.0 KiB
/* /////////////////////////////////////////////////////////////////////////
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* File: unixstl/synch/util/features.h
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*
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* Purpose: Discrimination of synchronisation features.
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*
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* Created: 23rd October 1997
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* Updated: 4th April 2010
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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/util/features.h
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*
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* \brief [C++ only] Discrimination of synchronisation features
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* (\ref group__library__synch "Synchronisation" Library).
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*/
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#ifndef UNIXSTL_INCL_UNIXSTL_SYNCH_UTIL_H_FEATURES
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#define UNIXSTL_INCL_UNIXSTL_SYNCH_UTIL_H_FEATURES
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#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
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# define UNIXSTL_VER_UNIXSTL_SYNCH_UTIL_H_FEATURES_MAJOR 1
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# define UNIXSTL_VER_UNIXSTL_SYNCH_UTIL_H_FEATURES_MINOR 1
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# define UNIXSTL_VER_UNIXSTL_SYNCH_UTIL_H_FEATURES_REVISION 2
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# define UNIXSTL_VER_UNIXSTL_SYNCH_UTIL_H_FEATURES_EDIT 7
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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 STLSOFT_INCL_H_UNISTD
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# define STLSOFT_INCL_H_UNISTD
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# include <unistd.h> /* Required for definition of _POSIX_THREADS on some impls. */
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#endif /* !STLSOFT_INCL_H_UNISTD */
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/* /////////////////////////////////////////////////////////////////////////
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* Features
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*
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* 1. UNIXSTL_HAS_ATOMIC_INTEGER_OPERATIONS
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* 2. UNIXSTL_USING_PTHREADS
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*/
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/* 1. UNIXSTL_HAS_ATOMIC_INTEGER_OPERATIONS */
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#ifdef STLSOFT_DOCUMENTATION_SKIP_SECTION
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/** \def UNIXSTL_HAS_ATOMIC_INTEGER_OPERATIONS
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*
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* \brief If defined, indicates that the operating system supports atomic
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* integer operations, and that they're safe for use outside the kernel.
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*
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* Atomic integer operations are assumed on the following "UNIX" platforms:
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*
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* - Mac OS-X (via OSMemoryBarrier(), etc; <libkern/OSAtomic.h>)
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* - Win32 (via InterlockedIncrement(), etc; <windows.h>)
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*
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* or:
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*
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* - the symbol UNIXSTL_FORCE_ATOMIC_INTEGER_OPERATIONS is defined. In
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* this case, you must also define UNIXSTL_FORCED_ATOMIC_INT_T (as the
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* atomic integer type, e.g. int) and
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* UNIXSTL_FORCED_ATOMIC_INTEGER_IMPLEMENTATIONS (as the file to be
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* included _inside_ the unixstl namespace in
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* unixstl/synch/atomic_functions.h)
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*/
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# define UNIXSTL_HAS_ATOMIC_INTEGER_OPERATIONS
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#else /* ? STLSOFT_DOCUMENTATION_SKIP_SECTION */
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# ifdef UNIXSTL_HAS_ATOMIC_INTEGER_OPERATIONS
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# undef UNIXSTL_HAS_ATOMIC_INTEGER_OPERATIONS
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# endif /* UNIXSTL_HAS_ATOMIC_INTEGER_OPERATIONS */
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# ifdef UNIXSTL_ATOMIC_INTEGER_OPERATIONS_VIA_GCC_BUILTINS
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# undef UNIXSTL_ATOMIC_INTEGER_OPERATIONS_VIA_GCC_BUILTINS
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# endif /* UNIXSTL_ATOMIC_INTEGER_OPERATIONS_VIA_GCC_BUILTINS */
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# ifdef UNIXSTL_ATOMIC_INTEGER_OPERATIONS_VIA_MACOSX
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# undef UNIXSTL_ATOMIC_INTEGER_OPERATIONS_VIA_MACOSX
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# endif /* UNIXSTL_ATOMIC_INTEGER_OPERATIONS_VIA_MACOSX */
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# ifdef UNIXSTL_ATOMIC_INTEGER_OPERATIONS_VIA_WINDOWS_INTERLOCKED
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# undef UNIXSTL_ATOMIC_INTEGER_OPERATIONS_VIA_WINDOWS_INTERLOCKED
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# endif /* UNIXSTL_ATOMIC_INTEGER_OPERATIONS_VIA_WINDOWS_INTERLOCKED */
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# if \
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defined(UNIXSTL_FORCE_ATOMIC_INTEGER_OPERATIONS)
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# define UNIXSTL_HAS_ATOMIC_INTEGER_OPERATIONS
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# elif \
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( defined(_WIN32) || \
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defined(_WIN64)) && \
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!defined(UNIXSTL_NO_ATOMIC_INTEGER_OPERATIONS_ON_WINDOWS)
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# define UNIXSTL_ATOMIC_INTEGER_OPERATIONS_VIA_WINDOWS_INTERLOCKED
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# define UNIXSTL_HAS_ATOMIC_INTEGER_OPERATIONS
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# elif \
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defined(UNIXSTL_OS_IS_MACOSX)
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# define UNIXSTL_ATOMIC_INTEGER_OPERATIONS_VIA_MACOSX
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# define UNIXSTL_HAS_ATOMIC_INTEGER_OPERATIONS
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# endif
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#endif /* STLSOFT_DOCUMENTATION_SKIP_SECTION */
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/* 1. UNIXSTL_USING_PTHREADS */
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#ifdef STLSOFT_DOCUMENTATION_SKIP_SECTION
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/** \def UNIXSTL_USING_PTHREADS
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*
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* \brief If defined, indicates that PThreads is selected.
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*
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* PThreads is selected if:
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*
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* - _POSIX_THREADS is defined and _REENTRANT is defined, or
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* - UNIXSTL_FORCE_PTHREADS is defined, which causes <pthread.h> to be
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* included, and the symbol _REENTRANT (and _POSIX_THREADS on Windows)
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* to be defined if they are not already.
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*/
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# define UNIXSTL_USING_PTHREADS
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#else /* ? STLSOFT_DOCUMENTATION_SKIP_SECTION */
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# ifdef UNIXSTL_USING_PTHREADS
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# undef UNIXSTL_USING_PTHREADS
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# endif /* UNIXSTL_USING_PTHREADS */
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# if defined(UNIXSTL_FORCE_PTHREADS)
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# if defined(_STLSOFT_FORCE_ANY_COMPILER) && \
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( defined(_WIN32) || \
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defined(_WIN64))
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/* Emulating UNIX on Win32 */
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# if !defined(__MT__) && \
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!defined(_MT)
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# error Cannot force PThreads on Windows unless multi-threaded compilation is enabled
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# else /* ? MT */
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# ifndef _POSIX_THREADS
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# define _POSIX_THREADS
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# endif /* !_POSIX_THREADS */
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# ifndef _REENTRANT
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# define _REENTRANT
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# endif /* !_REENTRANT */
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# endif /* MT */
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# else /* ? compiler / OS */
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# ifndef _POSIX_THREADS
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# error Cannot force PThreads on a system on which _POSIX_THREADS is not defined
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# endif /* !_POSIX_THREADS */
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# ifndef _REENTRANT
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# define _REENTRANT
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# endif /* !_REENTRANT */
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# endif /* compiler / OS */
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# endif /* UNIXSTL_FORCE_PTHREADS */
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# if defined(_REENTRANT)
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# define UNIXSTL_USING_PTHREADS
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# endif /* _REENTRANT */
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#endif /* STLSOFT_DOCUMENTATION_SKIP_SECTION */
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/* ////////////////////////////////////////////////////////////////////// */
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#endif /* !UNIXSTL_INCL_UNIXSTL_SYNCH_UTIL_H_FEATURES */
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/* ///////////////////////////// end of file //////////////////////////// */
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