1 //---------------------------------------------------------------------------//
2 // Copyright (c) 2013-2014 Kyle Lutz <kyle.r.lutz@gmail.com>
3 //
4 // Distributed under the Boost Software License, Version 1.0
5 // See accompanying file LICENSE_1_0.txt or copy at
6 // http://www.boost.org/LICENSE_1_0.txt
7 //
8 // See http://boostorg.github.com/compute for more information.
9 //---------------------------------------------------------------------------//
10 
11 #ifndef BOOST_COMPUTE_DETAIL_GLOBAL_STATIC_HPP
12 #define BOOST_COMPUTE_DETAIL_GLOBAL_STATIC_HPP
13 
14 #include <boost/compute/config.hpp>
15 
16 #ifdef BOOST_COMPUTE_THREAD_SAFE
17 #  ifdef BOOST_COMPUTE_HAVE_THREAD_LOCAL
18      // use c++11 thread local storage
19 #    define BOOST_COMPUTE_DETAIL_GLOBAL_STATIC(type, name, ctor) \
20        thread_local type name ctor;
21 #  else
22       // use thread_specific_ptr from boost.thread
23 #     include <boost/thread/tss.hpp>
24 #     define BOOST_COMPUTE_DETAIL_GLOBAL_STATIC(type, name, ctor) \
25         static ::boost::thread_specific_ptr< type > BOOST_PP_CAT(name, _tls_ptr_); \
26         if(!BOOST_PP_CAT(name, _tls_ptr_).get()){ \
27             BOOST_PP_CAT(name, _tls_ptr_).reset(new type ctor); \
28         } \
29         static type &name = *BOOST_PP_CAT(name, _tls_ptr_);
30 #  endif
31 #else
32    // no thread-safety, just use static
33 #  define BOOST_COMPUTE_DETAIL_GLOBAL_STATIC(type, name, ctor) \
34      static type name ctor;
35 #endif
36 
37 #endif // BOOST_COMPUTE_DETAIL_GLOBAL_STATIC_HPP
38