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Diffstat (limited to 'boost/asio/detail/posix_tss_ptr.hpp')
-rw-r--r-- | boost/asio/detail/posix_tss_ptr.hpp | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/boost/asio/detail/posix_tss_ptr.hpp b/boost/asio/detail/posix_tss_ptr.hpp new file mode 100644 index 0000000000..33ac502281 --- /dev/null +++ b/boost/asio/detail/posix_tss_ptr.hpp @@ -0,0 +1,82 @@ +// +// detail/posix_tss_ptr.hpp +// ~~~~~~~~~~~~~~~~~~~~~~~~ +// +// Copyright (c) 2003-2012 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/config.hpp> + +#if defined(BOOST_HAS_PTHREADS) && !defined(BOOST_ASIO_DISABLE_THREADS) + +#include <pthread.h> +#include <boost/asio/detail/noncopyable.hpp> + +#include <boost/asio/detail/push_options.hpp> + +namespace boost { +namespace asio { +namespace detail { + +// Helper function to create thread-specific storage. +BOOST_ASIO_DECL void posix_tss_ptr_create(pthread_key_t& key); + +template <typename T> +class posix_tss_ptr + : private noncopyable +{ +public: + // Constructor. + posix_tss_ptr() + { + posix_tss_ptr_create(tss_key_); + } + + // 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 + +#include <boost/asio/detail/pop_options.hpp> + +#if defined(BOOST_ASIO_HEADER_ONLY) +# include <boost/asio/detail/impl/posix_tss_ptr.ipp> +#endif // defined(BOOST_ASIO_HEADER_ONLY) + +#endif // defined(BOOST_HAS_PTHREADS) && !defined(BOOST_ASIO_DISABLE_THREADS) + +#endif // BOOST_ASIO_DETAIL_POSIX_TSS_PTR_HPP |