70 lines
3 KiB
C
70 lines
3 KiB
C
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////////////////////////////////////////////////////////////////////////////////
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// The Loki Library
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// Copyright (c) 2009 by Rich Sposato
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// Permission to use, copy, modify, distribute and sell this software for any
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// purpose is hereby granted without fee, provided that the above copyright
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// notice appear in all copies and that both that copyright notice and this
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// permission notice appear in supporting documentation.
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// The author makes no representations about the
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// suitability of this software for any purpose. It is provided "as is"
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// without express or implied warranty.
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////////////////////////////////////////////////////////////////////////////////
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#ifndef LOKI_THREAD_LOCAL_H_INCLUDED
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#define LOKI_THREAD_LOCAL_H_INCLUDED
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// $Id$
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// ----------------------------------------------------------------------------
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// First assume the compiler does allow thread-local storage by #defining the
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// macro which allows compiler to see the code inside this file.
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// Then #undefine the macro for compilers which are known for not supporting
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// thread-local storage.
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#define LOKI_THINKS_COMPILER_ALLOWS_THREAD_LOCAL_STORAGE 1
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// The __APPLE__ macro does not refer to a compiler, but to the Apple OSX operating system.
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#if defined( __APPLE__ )
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#warning "GCC for Apple does not allow thread_local storage, so you can not use some parts of Loki."
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#undef COMPILER_ALLOWS_THREAD_LOCAL_STORAGE
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#endif
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#if ( defined( __CYGWIN__ ) && ( __GNUC__ <= 3 ) )
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#warning "Older versions of GCC for Cygwin do not allow thread_local storage, so you can not use some parts of Loki."
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#undef COMPILER_ALLOWS_THREAD_LOCAL_STORAGE
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#endif
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#if defined( LOKI_THINKS_COMPILER_ALLOWS_THREAD_LOCAL_STORAGE ) && !defined( LOKI_THREAD_LOCAL )
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/** @par thread_local Keyword
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Some parts of Loki require compilers to provide thread local storage - meaning
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each thread gets its own copy of the data. The next version of C++ will have
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a new keyword, thread_local for that purpose. Some existing compilers already
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provide thread local storage using different syntax, so these lines use
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thread_local to mimic that syntax. If your compiler provides thread local
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storage but using different syntax besides "thread_local", you may want to
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modify these lines. If your compiler does not support thread local storage,
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you can't use some parts of Loki.
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*/
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#if defined( _MSC_VER )
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#if ( _MSC_VER >= 1300 )
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#define LOKI_THREAD_LOCAL __declspec( thread )
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#else
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#error "Only Visual Studio versions 7.0 and after supported."
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#endif
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#elif ( __GNUC__ )
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#define LOKI_THREAD_LOCAL __thread
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#else
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#warning "Check if your compiler provides thread local storage."
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#define LOKI_THREAD_LOCAL thread_local
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#endif
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#endif // if compiler allows thread_local storage and LOKI_THREAD_LOCAL macro not defined yet
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// ----------------------------------------------------------------------------
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#endif // end file guardian
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