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+//
+// posix_thread.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 ASIO_DETAIL_POSIX_THREAD_HPP
+#define ASIO_DETAIL_POSIX_THREAD_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include "asio/detail/push_options.hpp"
+
+#include "asio/detail/push_options.hpp"
+#include <boost/config.hpp>
+#include "asio/detail/pop_options.hpp"
+
+#if defined(BOOST_HAS_PTHREADS)
+
+#include "asio/detail/push_options.hpp"
+#include <memory>
+#include <boost/throw_exception.hpp>
+#include <pthread.h>
+#include "asio/detail/pop_options.hpp"
+
+#include "asio/error.hpp"
+#include "asio/system_error.hpp"
+#include "asio/detail/noncopyable.hpp"
+
+namespace asio {
+namespace detail {
+
+extern "C" void* asio_detail_posix_thread_function(void* arg);
+
+class posix_thread
+ : private noncopyable
+{
+public:
+ // Constructor.
+ template <typename Function>
+ posix_thread(Function f)
+ : joined_(false)
+ {
+ std::auto_ptr<func_base> arg(new func<Function>(f));
+ int error = ::pthread_create(&thread_, 0,
+ asio_detail_posix_thread_function, arg.get());
+ if (error != 0)
+ {
+ asio::system_error e(
+ asio::error_code(error,
+ asio::error::get_system_category()),
+ "thread");
+ boost::throw_exception(e);
+ }
+ arg.release();
+ }
+
+ // Destructor.
+ ~posix_thread()
+ {
+ if (!joined_)
+ ::pthread_detach(thread_);
+ }
+
+ // Wait for the thread to exit.
+ void join()
+ {
+ if (!joined_)
+ {
+ ::pthread_join(thread_, 0);
+ joined_ = true;
+ }
+ }
+
+private:
+ friend void* asio_detail_posix_thread_function(void* arg);
+
+ class func_base
+ {
+ public:
+ virtual ~func_base() {}
+ virtual void run() = 0;
+ };
+
+ template <typename Function>
+ class func
+ : public func_base
+ {
+ public:
+ func(Function f)
+ : f_(f)
+ {
+ }
+
+ virtual void run()
+ {
+ f_();
+ }
+
+ private:
+ Function f_;
+ };
+
+ ::pthread_t thread_;
+ bool joined_;
+};
+
+inline void* asio_detail_posix_thread_function(void* arg)
+{
+ std::auto_ptr<posix_thread::func_base> f(
+ static_cast<posix_thread::func_base*>(arg));
+ f->run();
+ return 0;
+}
+
+} // namespace detail
+} // namespace asio
+
+#endif // defined(BOOST_HAS_PTHREADS)
+
+#include "asio/detail/pop_options.hpp"
+
+#endif // ASIO_DETAIL_POSIX_THREAD_HPP