89 lines
1.9 KiB
C++
89 lines
1.9 KiB
C++
//
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// posix_tss_ptr.hpp
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// ~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2008 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef ASIO_DETAIL_POSIX_TSS_PTR_HPP
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#define ASIO_DETAIL_POSIX_TSS_PTR_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include "asio/detail/push_options.hpp"
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#include "asio/detail/push_options.hpp"
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#include <boost/config.hpp>
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#include "asio/detail/pop_options.hpp"
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#if defined(BOOST_HAS_PTHREADS)
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#include "asio/detail/push_options.hpp"
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#include <boost/throw_exception.hpp>
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#include <pthread.h>
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#include "asio/detail/pop_options.hpp"
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#include "asio/error.hpp"
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#include "asio/system_error.hpp"
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#include "asio/detail/noncopyable.hpp"
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namespace asio {
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namespace detail {
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template <typename T>
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class posix_tss_ptr
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: private noncopyable
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{
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public:
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// Constructor.
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posix_tss_ptr()
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{
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int error = ::pthread_key_create(&tss_key_, 0);
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if (error != 0)
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{
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asio::system_error e(
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asio::error_code(error,
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asio::error::get_system_category()),
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"tss");
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boost::throw_exception(e);
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}
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}
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// Destructor.
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~posix_tss_ptr()
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{
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::pthread_key_delete(tss_key_);
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}
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// Get the value.
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operator T*() const
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{
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return static_cast<T*>(::pthread_getspecific(tss_key_));
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}
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// Set the value.
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void operator=(T* value)
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{
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::pthread_setspecific(tss_key_, value);
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}
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private:
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// Thread-specific storage to allow unlocked access to determine whether a
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// thread is a member of the pool.
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pthread_key_t tss_key_;
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};
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} // namespace detail
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} // namespace asio
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#endif // defined(BOOST_HAS_PTHREADS)
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#include "asio/detail/pop_options.hpp"
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#endif // ASIO_DETAIL_POSIX_TSS_PTR_HPP
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