e20e694104
git-svn-id: svn://svn.code.sf.net/p/loki-lib/code/trunk@1119 7ec92016-0320-0410-acc4-a06ded1c099a
94 lines
4.3 KiB
C
94 lines
4.3 KiB
C
////////////////////////////////////////////////////////////////////////////////
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// The Loki Library
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// Copyright (c) 2009 by Rich Sposato
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// Code covered by the MIT License
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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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 #undef the macro for compilers which do not support thread-local
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// storage or do not implement it correctly.
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#define LOKI_THINKS_COMPILER_ALLOWS_THREAD_LOCAL_STORAGE 1
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#if defined( __GNUC__ )
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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 LOKI_THINKS_COMPILER_ALLOWS_THREAD_LOCAL_STORAGE
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#elif defined( __CYGWIN__ )
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#if ( __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 LOKI_THINKS_COMPILER_ALLOWS_THREAD_LOCAL_STORAGE
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#endif
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#elif ( __GNUC__ == 4 ) // GNU versions other than Cygwin.
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#if ( __GNUC_MINOR__ < 4 )
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#warning "GCC versions before 4.4 implement thread_local storage incorrectly, so you can not use some parts of Loki."
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#undef LOKI_THINKS_COMPILER_ALLOWS_THREAD_LOCAL_STORAGE
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#elif ( __GNUC_MINOR__ == 4 )
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#warning "GCC version 4.4 implements thread_local storage incorrectly for some platforms but not others."
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#endif
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#endif
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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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#warning "Run ThreadLocal test project to see if the compiler implements thread_local correctly."
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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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