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Diffstat (limited to '3rdParty/Boost/boost/asio/detail/winsock_init.hpp')
-rw-r--r-- | 3rdParty/Boost/boost/asio/detail/winsock_init.hpp | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/3rdParty/Boost/boost/asio/detail/winsock_init.hpp b/3rdParty/Boost/boost/asio/detail/winsock_init.hpp new file mode 100644 index 0000000..827cf58 --- /dev/null +++ b/3rdParty/Boost/boost/asio/detail/winsock_init.hpp @@ -0,0 +1,122 @@ +// +// winsock_init.hpp +// ~~~~~~~~~~~~~~~~ +// +// Copyright (c) 2003-2008 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_WINSOCK_INIT_HPP +#define BOOST_ASIO_DETAIL_WINSOCK_INIT_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_WINDOWS) || defined(__CYGWIN__) + +#include <boost/asio/detail/push_options.hpp> +#include <boost/shared_ptr.hpp> +#include <boost/throw_exception.hpp> +#include <boost/asio/detail/pop_options.hpp> + +#include <boost/asio/error.hpp> +#include <boost/asio/detail/noncopyable.hpp> +#include <boost/asio/detail/socket_types.hpp> + +namespace boost { +namespace asio { +namespace detail { + +template <int Major = 2, int Minor = 0> +class winsock_init + : private noncopyable +{ +private: + // Structure to perform the actual initialisation. + struct do_init + { + do_init() + { + WSADATA wsa_data; + result_ = ::WSAStartup(MAKEWORD(Major, Minor), &wsa_data); + } + + ~do_init() + { + ::WSACleanup(); + } + + int result() const + { + return result_; + } + + // Helper function to manage a do_init singleton. The static instance of the + // winsock_init object ensures that this function is always called before + // main, and therefore before any other threads can get started. The do_init + // instance must be static in this function to ensure that it gets + // initialised before any other global objects try to use it. + static boost::shared_ptr<do_init> instance() + { + static boost::shared_ptr<do_init> init(new do_init); + return init; + } + + private: + int result_; + }; + +public: + // Constructor. + winsock_init() + : ref_(do_init::instance()) + { + // Check whether winsock was successfully initialised. This check is not + // performed for the global instance since there will be nobody around to + // catch the exception. + if (this != &instance_ && ref_->result() != 0) + { + boost::system::system_error e( + boost::system::error_code(ref_->result(), + boost::asio::error::get_system_category()), + "winsock"); + boost::throw_exception(e); + } + } + + // Destructor. + ~winsock_init() + { + } + +private: + // Instance to force initialisation of winsock at global scope. + static winsock_init instance_; + + // Reference to singleton do_init object to ensure that winsock does not get + // cleaned up until the last user has finished with it. + boost::shared_ptr<do_init> ref_; +}; + +template <int Major, int Minor> +winsock_init<Major, Minor> winsock_init<Major, Minor>::instance_; + +} // namespace detail +} // namespace asio +} // namespace boost + +#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__) + +#include <boost/asio/detail/pop_options.hpp> + +#endif // BOOST_ASIO_DETAIL_WINSOCK_INIT_HPP |