// // posix_tss_ptr.hpp // ~~~~~~~~~~~~~~~~~ // // Copyright (c) 2003-2010 Christopher M. Kohlhoff (chris at kohlhoff dot com) // // Distributed under the Boost Software License, Version 1.0. (See accompanying // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) // #ifndef BOOST_ASIO_DETAIL_POSIX_TSS_PTR_HPP #define BOOST_ASIO_DETAIL_POSIX_TSS_PTR_HPP #if defined(_MSC_VER) && (_MSC_VER >= 1200) # pragma once #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) #include <boost/asio/detail/push_options.hpp> #include <boost/asio/detail/push_options.hpp> #include <boost/config.hpp> #include <boost/system/system_error.hpp> #include <boost/asio/detail/pop_options.hpp> #if defined(BOOST_HAS_PTHREADS) #include <boost/asio/detail/push_options.hpp> #include <boost/throw_exception.hpp> #include <pthread.h> #include <boost/asio/detail/pop_options.hpp> #include <boost/asio/error.hpp> #include <boost/asio/detail/noncopyable.hpp> namespace boost { namespace asio { namespace detail { template <typename T> class posix_tss_ptr : private noncopyable { public: // Constructor. posix_tss_ptr() { int error = ::pthread_key_create(&tss_key_, 0); if (error != 0) { boost::system::system_error e( boost::system::error_code(error, boost::asio::error::get_system_category()), "tss"); boost::throw_exception(e); } } // Destructor. ~posix_tss_ptr() { ::pthread_key_delete(tss_key_); } // Get the value. operator T*() const { return static_cast<T*>(::pthread_getspecific(tss_key_)); } // Set the value. void operator=(T* value) { ::pthread_setspecific(tss_key_, value); } private: // Thread-specific storage to allow unlocked access to determine whether a // thread is a member of the pool. pthread_key_t tss_key_; }; } // namespace detail } // namespace asio } // namespace boost #endif // defined(BOOST_HAS_PTHREADS) #include <boost/asio/detail/pop_options.hpp> #endif // BOOST_ASIO_DETAIL_POSIX_TSS_PTR_HPP