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buffer_resize_guard.hpp - Hosted on DriveHQ Cloud IT Platform
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路径: \\game3dprogramming\materials\GameFactory\GameFactoryDemo\references\boost_1_35_0\boost\asio\detail\buffer_resize_guard.hpp
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// // buffer_resize_guard.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_BUFFER_RESIZE_GUARD_HPP #define BOOST_ASIO_DETAIL_BUFFER_RESIZE_GUARD_HPP #if defined(_MSC_VER) && (_MSC_VER >= 1200) # pragma once #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) #include
#include
#include
#include
#include
namespace boost { namespace asio { namespace detail { // Helper class to manage buffer resizing in an exception safe way. template
class buffer_resize_guard { public: // Constructor. buffer_resize_guard(Buffer& buffer) : buffer_(buffer), old_size_(buffer.size()) { } // Destructor rolls back the buffer resize unless commit was called. ~buffer_resize_guard() { if (old_size_ != std::numeric_limits
::max BOOST_PREVENT_MACRO_SUBSTITUTION()) { buffer_.resize(old_size_); } } // Commit the resize transaction. void commit() { old_size_ = std::numeric_limits
::max BOOST_PREVENT_MACRO_SUBSTITUTION(); } private: // The buffer being managed. Buffer& buffer_; // The size of the buffer at the time the guard was constructed. size_t old_size_; }; } // namespace detail } // namespace asio } // namespace boost #include
#endif // BOOST_ASIO_DETAIL_BUFFER_RESIZE_GUARD_HPP
buffer_resize_guard.hpp
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