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3461bafaa2
New classes:
class async_completion:
Helper class for implementing asynchronous initiation functions.
See n3964:
Library Foundations for Asynchronous Operations, Revision 1
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n3964.pdf
class basic_streambuf:
Meets the requirements of Streambuf.
class buffered_readstream:
Buffers a ReadStream with a ConstBufferSequence.
class consuming_buffers:
Adapts a BufferSequence which wraps the underlying buffer
sequence and presents fewer bytes, with the retained bytes
occurring at the end of the sequence.
class handler_alloc:
A C++ Allocator the uses asio handler allocation hooks.
class static_streambuf:
An implementation of the Streambuf concept that uses a
fixed size buffer with size determined at compile-time.
class streambuf_readstream:
Buffers a ReadStream with a Streambuf.
New functions:
append_buffers()
Returns a new BufferSequence which efficiently concatenates
two or more buffer sequences together.
prepare_buffers()
Shortens a buffer sequence. The bytes excluded are at the
end of the underlying buffer sequence.
boost::asio::read_until()
A copy of boost::asio::read_until overloads, modified to work
with a beast::asio::basic_streambuf.
Debugging:
buffers_to_string()
Convert a ConstBufferSequence to a human readable string
suitable for diagnostics.
type_check.h:
Metafunctions for checking asio concepts:
AsyncReadStream, AsyncWriteStream
SyncReadStream, SyncWriteStream
ConstBufferSequence, MutableBufferSequence
Streambuf
Handler
Changes:
* All symbols moved up a namespace level.
* streambuf provides all move and copy special members,
behavior of moved from objects is well-defined.
Fixes:
* Fix basic_streambuf iterator category.
110 lines
2.5 KiB
C++
110 lines
2.5 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of Beast: https://github.com/vinniefalco/Beast
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Copyright 2013, Vinnie Falco <vinnie.falco@gmail.com>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#ifndef BEAST_ASIO_TEMP_BUFFER_H_INCLUDED
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#define BEAST_ASIO_TEMP_BUFFER_H_INCLUDED
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#include <boost/asio/buffer.hpp>
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#include <boost/asio/detail/handler_alloc_helpers.hpp>
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#include <cstdlib>
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#include <memory>
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#include <utility>
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namespace beast {
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template<class Handler>
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class temp_buffer
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{
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Handler& h_;
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std::size_t n_ = 0;
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std::uint8_t* p_ = nullptr;
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public:
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explicit
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temp_buffer(Handler& h)
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: h_(h)
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{
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}
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~temp_buffer()
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{
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if(p_)
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dealloc();
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}
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operator
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boost::asio::const_buffer() const
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{
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return boost::asio::const_buffer{p_, n_};
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}
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operator
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boost::asio::mutable_buffer() const
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{
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return boost::asio::mutable_buffer{p_, n_};
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}
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std::uint8_t*
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data() const
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{
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return p_;
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}
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std::size_t
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size()
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{
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return n_;
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}
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boost::asio::mutable_buffers_1
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buffers() const
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{
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return boost::asio::mutable_buffers_1{
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p_, n_};
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}
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void
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alloc(std::size_t size)
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{
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if(n_ != size)
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{
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if(p_)
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dealloc();
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n_ = size;
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if(n_ > 0)
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p_ = reinterpret_cast<std::uint8_t*>(
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boost_asio_handler_alloc_helpers::
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allocate(n_, h_));
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}
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}
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void
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dealloc()
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{
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boost_asio_handler_alloc_helpers::
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deallocate(p_, n_, h_);
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p_ = nullptr;
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n_ = 0;
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}
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};
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} // beast
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#endif
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