/usr/include/boost/asio/impl/buffered_write_stream.hpp is in libboost1.55-dev 1.55.0+dfsg-3.
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// impl/buffered_write_stream.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2013 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_IMPL_BUFFERED_WRITE_STREAM_HPP
#define BOOST_ASIO_IMPL_BUFFERED_WRITE_STREAM_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include <boost/asio/detail/handler_alloc_helpers.hpp>
#include <boost/asio/detail/handler_cont_helpers.hpp>
#include <boost/asio/detail/handler_invoke_helpers.hpp>
#include <boost/asio/detail/handler_type_requirements.hpp>
#include <boost/asio/detail/push_options.hpp>
namespace boost {
namespace asio {
template <typename Stream>
std::size_t buffered_write_stream<Stream>::flush()
{
std::size_t bytes_written = write(next_layer_,
buffer(storage_.data(), storage_.size()));
storage_.consume(bytes_written);
return bytes_written;
}
template <typename Stream>
std::size_t buffered_write_stream<Stream>::flush(boost::system::error_code& ec)
{
std::size_t bytes_written = write(next_layer_,
buffer(storage_.data(), storage_.size()),
transfer_all(), ec);
storage_.consume(bytes_written);
return bytes_written;
}
namespace detail
{
template <typename WriteHandler>
class buffered_flush_handler
{
public:
buffered_flush_handler(detail::buffered_stream_storage& storage,
WriteHandler& handler)
: storage_(storage),
handler_(handler)
{
}
#if defined(BOOST_ASIO_HAS_MOVE)
buffered_flush_handler(const buffered_flush_handler& other)
: storage_(other.storage_),
handler_(other.handler_)
{
}
buffered_flush_handler(buffered_flush_handler&& other)
: storage_(other.storage_),
handler_(BOOST_ASIO_MOVE_CAST(WriteHandler)(other.handler_))
{
}
#endif // defined(BOOST_ASIO_HAS_MOVE)
void operator()(const boost::system::error_code& ec,
const std::size_t bytes_written)
{
storage_.consume(bytes_written);
handler_(ec, bytes_written);
}
//private:
detail::buffered_stream_storage& storage_;
WriteHandler handler_;
};
template <typename WriteHandler>
inline void* asio_handler_allocate(std::size_t size,
buffered_flush_handler<WriteHandler>* this_handler)
{
return boost_asio_handler_alloc_helpers::allocate(
size, this_handler->handler_);
}
template <typename WriteHandler>
inline void asio_handler_deallocate(void* pointer, std::size_t size,
buffered_flush_handler<WriteHandler>* this_handler)
{
boost_asio_handler_alloc_helpers::deallocate(
pointer, size, this_handler->handler_);
}
template <typename WriteHandler>
inline bool asio_handler_is_continuation(
buffered_flush_handler<WriteHandler>* this_handler)
{
return boost_asio_handler_cont_helpers::is_continuation(
this_handler->handler_);
}
template <typename Function, typename WriteHandler>
inline void asio_handler_invoke(Function& function,
buffered_flush_handler<WriteHandler>* this_handler)
{
boost_asio_handler_invoke_helpers::invoke(
function, this_handler->handler_);
}
template <typename Function, typename WriteHandler>
inline void asio_handler_invoke(const Function& function,
buffered_flush_handler<WriteHandler>* this_handler)
{
boost_asio_handler_invoke_helpers::invoke(
function, this_handler->handler_);
}
}
template <typename Stream>
template <typename WriteHandler>
BOOST_ASIO_INITFN_RESULT_TYPE(WriteHandler,
void (boost::system::error_code, std::size_t))
buffered_write_stream<Stream>::async_flush(
BOOST_ASIO_MOVE_ARG(WriteHandler) handler)
{
// If you get an error on the following line it means that your handler does
// not meet the documented type requirements for a WriteHandler.
BOOST_ASIO_WRITE_HANDLER_CHECK(WriteHandler, handler) type_check;
detail::async_result_init<
WriteHandler, void (boost::system::error_code, std::size_t)> init(
BOOST_ASIO_MOVE_CAST(WriteHandler)(handler));
async_write(next_layer_, buffer(storage_.data(), storage_.size()),
detail::buffered_flush_handler<BOOST_ASIO_HANDLER_TYPE(
WriteHandler, void (boost::system::error_code, std::size_t))>(
storage_, init.handler));
return init.result.get();
}
template <typename Stream>
template <typename ConstBufferSequence>
std::size_t buffered_write_stream<Stream>::write_some(
const ConstBufferSequence& buffers)
{
if (boost::asio::buffer_size(buffers) == 0)
return 0;
if (storage_.size() == storage_.capacity())
this->flush();
return this->copy(buffers);
}
template <typename Stream>
template <typename ConstBufferSequence>
std::size_t buffered_write_stream<Stream>::write_some(
const ConstBufferSequence& buffers, boost::system::error_code& ec)
{
ec = boost::system::error_code();
if (boost::asio::buffer_size(buffers) == 0)
return 0;
if (storage_.size() == storage_.capacity() && !flush(ec))
return 0;
return this->copy(buffers);
}
namespace detail
{
template <typename ConstBufferSequence, typename WriteHandler>
class buffered_write_some_handler
{
public:
buffered_write_some_handler(detail::buffered_stream_storage& storage,
const ConstBufferSequence& buffers, WriteHandler& handler)
: storage_(storage),
buffers_(buffers),
handler_(handler)
{
}
#if defined(BOOST_ASIO_HAS_MOVE)
buffered_write_some_handler(const buffered_write_some_handler& other)
: storage_(other.storage_),
buffers_(other.buffers_),
handler_(other.handler_)
{
}
buffered_write_some_handler(buffered_write_some_handler&& other)
: storage_(other.storage_),
buffers_(other.buffers_),
handler_(BOOST_ASIO_MOVE_CAST(WriteHandler)(other.handler_))
{
}
#endif // defined(BOOST_ASIO_HAS_MOVE)
void operator()(const boost::system::error_code& ec, std::size_t)
{
if (ec)
{
const std::size_t length = 0;
handler_(ec, length);
}
else
{
std::size_t orig_size = storage_.size();
std::size_t space_avail = storage_.capacity() - orig_size;
std::size_t bytes_avail = boost::asio::buffer_size(buffers_);
std::size_t length = bytes_avail < space_avail
? bytes_avail : space_avail;
storage_.resize(orig_size + length);
const std::size_t bytes_copied = boost::asio::buffer_copy(
storage_.data() + orig_size, buffers_, length);
handler_(ec, bytes_copied);
}
}
//private:
detail::buffered_stream_storage& storage_;
ConstBufferSequence buffers_;
WriteHandler handler_;
};
template <typename ConstBufferSequence, typename WriteHandler>
inline void* asio_handler_allocate(std::size_t size,
buffered_write_some_handler<
ConstBufferSequence, WriteHandler>* this_handler)
{
return boost_asio_handler_alloc_helpers::allocate(
size, this_handler->handler_);
}
template <typename ConstBufferSequence, typename WriteHandler>
inline void asio_handler_deallocate(void* pointer, std::size_t size,
buffered_write_some_handler<
ConstBufferSequence, WriteHandler>* this_handler)
{
boost_asio_handler_alloc_helpers::deallocate(
pointer, size, this_handler->handler_);
}
template <typename ConstBufferSequence, typename WriteHandler>
inline bool asio_handler_is_continuation(
buffered_write_some_handler<
ConstBufferSequence, WriteHandler>* this_handler)
{
return boost_asio_handler_cont_helpers::is_continuation(
this_handler->handler_);
}
template <typename Function, typename ConstBufferSequence,
typename WriteHandler>
inline void asio_handler_invoke(Function& function,
buffered_write_some_handler<
ConstBufferSequence, WriteHandler>* this_handler)
{
boost_asio_handler_invoke_helpers::invoke(
function, this_handler->handler_);
}
template <typename Function, typename ConstBufferSequence,
typename WriteHandler>
inline void asio_handler_invoke(const Function& function,
buffered_write_some_handler<
ConstBufferSequence, WriteHandler>* this_handler)
{
boost_asio_handler_invoke_helpers::invoke(
function, this_handler->handler_);
}
} // namespace detail
template <typename Stream>
template <typename ConstBufferSequence, typename WriteHandler>
BOOST_ASIO_INITFN_RESULT_TYPE(WriteHandler,
void (boost::system::error_code, std::size_t))
buffered_write_stream<Stream>::async_write_some(
const ConstBufferSequence& buffers,
BOOST_ASIO_MOVE_ARG(WriteHandler) handler)
{
// If you get an error on the following line it means that your handler does
// not meet the documented type requirements for a WriteHandler.
BOOST_ASIO_WRITE_HANDLER_CHECK(WriteHandler, handler) type_check;
detail::async_result_init<
WriteHandler, void (boost::system::error_code, std::size_t)> init(
BOOST_ASIO_MOVE_CAST(WriteHandler)(handler));
if (boost::asio::buffer_size(buffers) == 0
|| storage_.size() < storage_.capacity())
{
next_layer_.async_write_some(boost::asio::const_buffers_1(0, 0),
detail::buffered_write_some_handler<
ConstBufferSequence, BOOST_ASIO_HANDLER_TYPE(
WriteHandler, void (boost::system::error_code, std::size_t))>(
storage_, buffers, init.handler));
}
else
{
this->async_flush(detail::buffered_write_some_handler<
ConstBufferSequence, BOOST_ASIO_HANDLER_TYPE(
WriteHandler, void (boost::system::error_code, std::size_t))>(
storage_, buffers, init.handler));
}
return init.result.get();
}
template <typename Stream>
template <typename ConstBufferSequence>
std::size_t buffered_write_stream<Stream>::copy(
const ConstBufferSequence& buffers)
{
std::size_t orig_size = storage_.size();
std::size_t space_avail = storage_.capacity() - orig_size;
std::size_t bytes_avail = boost::asio::buffer_size(buffers);
std::size_t length = bytes_avail < space_avail ? bytes_avail : space_avail;
storage_.resize(orig_size + length);
return boost::asio::buffer_copy(
storage_.data() + orig_size, buffers, length);
}
} // namespace asio
} // namespace boost
#include <boost/asio/detail/pop_options.hpp>
#endif // BOOST_ASIO_IMPL_BUFFERED_WRITE_STREAM_HPP
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