1277 lines
46 KiB
C++
1277 lines
46 KiB
C++
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//
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// impl/read.hpp
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// ~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2023 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef ASIO_IMPL_READ_HPP
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#define ASIO_IMPL_READ_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include <algorithm>
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#include "asio/associator.hpp"
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#include "asio/buffer.hpp"
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#include "asio/detail/array_fwd.hpp"
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#include "asio/detail/base_from_cancellation_state.hpp"
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#include "asio/detail/base_from_completion_cond.hpp"
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#include "asio/detail/bind_handler.hpp"
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#include "asio/detail/consuming_buffers.hpp"
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#include "asio/detail/dependent_type.hpp"
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#include "asio/detail/handler_alloc_helpers.hpp"
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#include "asio/detail/handler_cont_helpers.hpp"
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#include "asio/detail/handler_invoke_helpers.hpp"
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#include "asio/detail/handler_tracking.hpp"
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#include "asio/detail/handler_type_requirements.hpp"
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#include "asio/detail/non_const_lvalue.hpp"
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#include "asio/detail/throw_error.hpp"
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#include "asio/error.hpp"
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#include "asio/detail/push_options.hpp"
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namespace asio {
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namespace detail
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{
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template <typename SyncReadStream, typename MutableBufferSequence,
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typename MutableBufferIterator, typename CompletionCondition>
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std::size_t read_buffer_seq(SyncReadStream& s,
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const MutableBufferSequence& buffers, const MutableBufferIterator&,
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CompletionCondition completion_condition, asio::error_code& ec)
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{
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ec = asio::error_code();
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asio::detail::consuming_buffers<mutable_buffer,
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MutableBufferSequence, MutableBufferIterator> tmp(buffers);
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while (!tmp.empty())
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{
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if (std::size_t max_size = detail::adapt_completion_condition_result(
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completion_condition(ec, tmp.total_consumed())))
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tmp.consume(s.read_some(tmp.prepare(max_size), ec));
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else
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break;
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}
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return tmp.total_consumed();
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}
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} // namespace detail
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template <typename SyncReadStream, typename MutableBufferSequence,
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typename CompletionCondition>
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std::size_t read(SyncReadStream& s, const MutableBufferSequence& buffers,
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CompletionCondition completion_condition, asio::error_code& ec,
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typename constraint<
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is_mutable_buffer_sequence<MutableBufferSequence>::value
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>::type)
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{
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return detail::read_buffer_seq(s, buffers,
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asio::buffer_sequence_begin(buffers),
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ASIO_MOVE_CAST(CompletionCondition)(completion_condition), ec);
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}
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template <typename SyncReadStream, typename MutableBufferSequence>
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inline std::size_t read(SyncReadStream& s, const MutableBufferSequence& buffers,
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typename constraint<
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is_mutable_buffer_sequence<MutableBufferSequence>::value
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>::type)
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{
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asio::error_code ec;
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std::size_t bytes_transferred = read(s, buffers, transfer_all(), ec);
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asio::detail::throw_error(ec, "read");
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return bytes_transferred;
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}
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template <typename SyncReadStream, typename MutableBufferSequence>
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inline std::size_t read(SyncReadStream& s, const MutableBufferSequence& buffers,
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asio::error_code& ec,
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typename constraint<
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is_mutable_buffer_sequence<MutableBufferSequence>::value
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>::type)
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{
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return read(s, buffers, transfer_all(), ec);
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}
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template <typename SyncReadStream, typename MutableBufferSequence,
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typename CompletionCondition>
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inline std::size_t read(SyncReadStream& s, const MutableBufferSequence& buffers,
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CompletionCondition completion_condition,
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typename constraint<
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is_mutable_buffer_sequence<MutableBufferSequence>::value
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>::type)
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{
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asio::error_code ec;
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std::size_t bytes_transferred = read(s, buffers,
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ASIO_MOVE_CAST(CompletionCondition)(completion_condition), ec);
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asio::detail::throw_error(ec, "read");
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return bytes_transferred;
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}
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#if !defined(ASIO_NO_DYNAMIC_BUFFER_V1)
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template <typename SyncReadStream, typename DynamicBuffer_v1,
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typename CompletionCondition>
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std::size_t read(SyncReadStream& s,
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ASIO_MOVE_ARG(DynamicBuffer_v1) buffers,
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CompletionCondition completion_condition, asio::error_code& ec,
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typename constraint<
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is_dynamic_buffer_v1<typename decay<DynamicBuffer_v1>::type>::value
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>::type,
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typename constraint<
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!is_dynamic_buffer_v2<typename decay<DynamicBuffer_v1>::type>::value
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>::type)
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{
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typename decay<DynamicBuffer_v1>::type b(
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ASIO_MOVE_CAST(DynamicBuffer_v1)(buffers));
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ec = asio::error_code();
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std::size_t total_transferred = 0;
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std::size_t max_size = detail::adapt_completion_condition_result(
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completion_condition(ec, total_transferred));
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std::size_t bytes_available = std::min<std::size_t>(
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std::max<std::size_t>(512, b.capacity() - b.size()),
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std::min<std::size_t>(max_size, b.max_size() - b.size()));
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while (bytes_available > 0)
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{
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std::size_t bytes_transferred = s.read_some(b.prepare(bytes_available), ec);
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b.commit(bytes_transferred);
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total_transferred += bytes_transferred;
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max_size = detail::adapt_completion_condition_result(
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completion_condition(ec, total_transferred));
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bytes_available = std::min<std::size_t>(
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std::max<std::size_t>(512, b.capacity() - b.size()),
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std::min<std::size_t>(max_size, b.max_size() - b.size()));
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}
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return total_transferred;
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}
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template <typename SyncReadStream, typename DynamicBuffer_v1>
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inline std::size_t read(SyncReadStream& s,
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ASIO_MOVE_ARG(DynamicBuffer_v1) buffers,
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typename constraint<
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is_dynamic_buffer_v1<typename decay<DynamicBuffer_v1>::type>::value
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>::type,
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typename constraint<
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!is_dynamic_buffer_v2<typename decay<DynamicBuffer_v1>::type>::value
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>::type)
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{
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asio::error_code ec;
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std::size_t bytes_transferred = read(s,
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ASIO_MOVE_CAST(DynamicBuffer_v1)(buffers), transfer_all(), ec);
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asio::detail::throw_error(ec, "read");
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return bytes_transferred;
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}
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template <typename SyncReadStream, typename DynamicBuffer_v1>
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inline std::size_t read(SyncReadStream& s,
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ASIO_MOVE_ARG(DynamicBuffer_v1) buffers,
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asio::error_code& ec,
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typename constraint<
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is_dynamic_buffer_v1<typename decay<DynamicBuffer_v1>::type>::value
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>::type,
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typename constraint<
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!is_dynamic_buffer_v2<typename decay<DynamicBuffer_v1>::type>::value
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>::type)
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{
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return read(s, ASIO_MOVE_CAST(DynamicBuffer_v1)(buffers),
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transfer_all(), ec);
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}
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template <typename SyncReadStream, typename DynamicBuffer_v1,
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typename CompletionCondition>
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inline std::size_t read(SyncReadStream& s,
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ASIO_MOVE_ARG(DynamicBuffer_v1) buffers,
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CompletionCondition completion_condition,
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typename constraint<
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is_dynamic_buffer_v1<typename decay<DynamicBuffer_v1>::type>::value
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>::type,
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typename constraint<
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!is_dynamic_buffer_v2<typename decay<DynamicBuffer_v1>::type>::value
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>::type)
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{
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asio::error_code ec;
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std::size_t bytes_transferred = read(s,
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ASIO_MOVE_CAST(DynamicBuffer_v1)(buffers),
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ASIO_MOVE_CAST(CompletionCondition)(completion_condition), ec);
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asio::detail::throw_error(ec, "read");
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return bytes_transferred;
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}
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#if !defined(ASIO_NO_EXTENSIONS)
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#if !defined(ASIO_NO_IOSTREAM)
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template <typename SyncReadStream, typename Allocator,
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typename CompletionCondition>
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inline std::size_t read(SyncReadStream& s,
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asio::basic_streambuf<Allocator>& b,
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CompletionCondition completion_condition, asio::error_code& ec)
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{
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return read(s, basic_streambuf_ref<Allocator>(b),
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ASIO_MOVE_CAST(CompletionCondition)(completion_condition), ec);
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}
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template <typename SyncReadStream, typename Allocator>
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inline std::size_t read(SyncReadStream& s,
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asio::basic_streambuf<Allocator>& b)
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{
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return read(s, basic_streambuf_ref<Allocator>(b));
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}
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template <typename SyncReadStream, typename Allocator>
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inline std::size_t read(SyncReadStream& s,
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asio::basic_streambuf<Allocator>& b,
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asio::error_code& ec)
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{
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return read(s, basic_streambuf_ref<Allocator>(b), ec);
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}
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template <typename SyncReadStream, typename Allocator,
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typename CompletionCondition>
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inline std::size_t read(SyncReadStream& s,
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asio::basic_streambuf<Allocator>& b,
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CompletionCondition completion_condition)
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{
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return read(s, basic_streambuf_ref<Allocator>(b),
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ASIO_MOVE_CAST(CompletionCondition)(completion_condition));
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}
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#endif // !defined(ASIO_NO_IOSTREAM)
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#endif // !defined(ASIO_NO_EXTENSIONS)
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#endif // !defined(ASIO_NO_DYNAMIC_BUFFER_V1)
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template <typename SyncReadStream, typename DynamicBuffer_v2,
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typename CompletionCondition>
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std::size_t read(SyncReadStream& s, DynamicBuffer_v2 buffers,
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CompletionCondition completion_condition, asio::error_code& ec,
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typename constraint<
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is_dynamic_buffer_v2<DynamicBuffer_v2>::value
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>::type)
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{
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DynamicBuffer_v2& b = buffers;
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ec = asio::error_code();
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std::size_t total_transferred = 0;
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std::size_t max_size = detail::adapt_completion_condition_result(
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completion_condition(ec, total_transferred));
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std::size_t bytes_available = std::min<std::size_t>(
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std::max<std::size_t>(512, b.capacity() - b.size()),
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std::min<std::size_t>(max_size, b.max_size() - b.size()));
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while (bytes_available > 0)
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{
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std::size_t pos = b.size();
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b.grow(bytes_available);
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std::size_t bytes_transferred = s.read_some(
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b.data(pos, bytes_available), ec);
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b.shrink(bytes_available - bytes_transferred);
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total_transferred += bytes_transferred;
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max_size = detail::adapt_completion_condition_result(
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completion_condition(ec, total_transferred));
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bytes_available = std::min<std::size_t>(
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std::max<std::size_t>(512, b.capacity() - b.size()),
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std::min<std::size_t>(max_size, b.max_size() - b.size()));
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}
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return total_transferred;
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}
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template <typename SyncReadStream, typename DynamicBuffer_v2>
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inline std::size_t read(SyncReadStream& s, DynamicBuffer_v2 buffers,
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typename constraint<
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is_dynamic_buffer_v2<DynamicBuffer_v2>::value
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>::type)
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{
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asio::error_code ec;
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std::size_t bytes_transferred = read(s,
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ASIO_MOVE_CAST(DynamicBuffer_v2)(buffers), transfer_all(), ec);
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asio::detail::throw_error(ec, "read");
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return bytes_transferred;
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}
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template <typename SyncReadStream, typename DynamicBuffer_v2>
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inline std::size_t read(SyncReadStream& s, DynamicBuffer_v2 buffers,
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asio::error_code& ec,
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typename constraint<
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is_dynamic_buffer_v2<DynamicBuffer_v2>::value
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>::type)
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{
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return read(s, ASIO_MOVE_CAST(DynamicBuffer_v2)(buffers),
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transfer_all(), ec);
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}
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template <typename SyncReadStream, typename DynamicBuffer_v2,
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typename CompletionCondition>
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inline std::size_t read(SyncReadStream& s, DynamicBuffer_v2 buffers,
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CompletionCondition completion_condition,
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typename constraint<
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is_dynamic_buffer_v2<DynamicBuffer_v2>::value
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>::type)
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{
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asio::error_code ec;
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std::size_t bytes_transferred = read(s,
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ASIO_MOVE_CAST(DynamicBuffer_v2)(buffers),
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ASIO_MOVE_CAST(CompletionCondition)(completion_condition), ec);
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asio::detail::throw_error(ec, "read");
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return bytes_transferred;
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}
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||
|
|
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||
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namespace detail
|
||
|
|
{
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template <typename AsyncReadStream, typename MutableBufferSequence,
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typename MutableBufferIterator, typename CompletionCondition,
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typename ReadHandler>
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class read_op
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: public base_from_cancellation_state<ReadHandler>,
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|
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base_from_completion_cond<CompletionCondition>
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|
|
{
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public:
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read_op(AsyncReadStream& stream, const MutableBufferSequence& buffers,
|
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|
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CompletionCondition& completion_condition, ReadHandler& handler)
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||
|
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: base_from_cancellation_state<ReadHandler>(
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|
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handler, enable_partial_cancellation()),
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|
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base_from_completion_cond<CompletionCondition>(completion_condition),
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stream_(stream),
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buffers_(buffers),
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start_(0),
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handler_(ASIO_MOVE_CAST(ReadHandler)(handler))
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||
|
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{
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}
|
||
|
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|
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|
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#if defined(ASIO_HAS_MOVE)
|
||
|
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read_op(const read_op& other)
|
||
|
|
: base_from_cancellation_state<ReadHandler>(other),
|
||
|
|
base_from_completion_cond<CompletionCondition>(other),
|
||
|
|
stream_(other.stream_),
|
||
|
|
buffers_(other.buffers_),
|
||
|
|
start_(other.start_),
|
||
|
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handler_(other.handler_)
|
||
|
|
{
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||
|
|
}
|
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|
|
|
||
|
|
read_op(read_op&& other)
|
||
|
|
: base_from_cancellation_state<ReadHandler>(
|
||
|
|
ASIO_MOVE_CAST(base_from_cancellation_state<
|
||
|
|
ReadHandler>)(other)),
|
||
|
|
base_from_completion_cond<CompletionCondition>(
|
||
|
|
ASIO_MOVE_CAST(base_from_completion_cond<
|
||
|
|
CompletionCondition>)(other)),
|
||
|
|
stream_(other.stream_),
|
||
|
|
buffers_(ASIO_MOVE_CAST(buffers_type)(other.buffers_)),
|
||
|
|
start_(other.start_),
|
||
|
|
handler_(ASIO_MOVE_CAST(ReadHandler)(other.handler_))
|
||
|
|
{
|
||
|
|
}
|
||
|
|
#endif // defined(ASIO_HAS_MOVE)
|
||
|
|
|
||
|
|
void operator()(asio::error_code ec,
|
||
|
|
std::size_t bytes_transferred, int start = 0)
|
||
|
|
{
|
||
|
|
std::size_t max_size;
|
||
|
|
switch (start_ = start)
|
||
|
|
{
|
||
|
|
case 1:
|
||
|
|
max_size = this->check_for_completion(ec, buffers_.total_consumed());
|
||
|
|
for (;;)
|
||
|
|
{
|
||
|
|
{
|
||
|
|
ASIO_HANDLER_LOCATION((__FILE__, __LINE__, "async_read"));
|
||
|
|
stream_.async_read_some(buffers_.prepare(max_size),
|
||
|
|
ASIO_MOVE_CAST(read_op)(*this));
|
||
|
|
}
|
||
|
|
return; default:
|
||
|
|
buffers_.consume(bytes_transferred);
|
||
|
|
if ((!ec && bytes_transferred == 0) || buffers_.empty())
|
||
|
|
break;
|
||
|
|
max_size = this->check_for_completion(ec, buffers_.total_consumed());
|
||
|
|
if (max_size == 0)
|
||
|
|
break;
|
||
|
|
if (this->cancelled() != cancellation_type::none)
|
||
|
|
{
|
||
|
|
ec = error::operation_aborted;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
ASIO_MOVE_OR_LVALUE(ReadHandler)(handler_)(
|
||
|
|
static_cast<const asio::error_code&>(ec),
|
||
|
|
static_cast<const std::size_t&>(buffers_.total_consumed()));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//private:
|
||
|
|
typedef asio::detail::consuming_buffers<mutable_buffer,
|
||
|
|
MutableBufferSequence, MutableBufferIterator> buffers_type;
|
||
|
|
|
||
|
|
AsyncReadStream& stream_;
|
||
|
|
buffers_type buffers_;
|
||
|
|
int start_;
|
||
|
|
ReadHandler handler_;
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename AsyncReadStream, typename MutableBufferSequence,
|
||
|
|
typename MutableBufferIterator, typename CompletionCondition,
|
||
|
|
typename ReadHandler>
|
||
|
|
inline asio_handler_allocate_is_deprecated
|
||
|
|
asio_handler_allocate(std::size_t size,
|
||
|
|
read_op<AsyncReadStream, MutableBufferSequence, MutableBufferIterator,
|
||
|
|
CompletionCondition, ReadHandler>* this_handler)
|
||
|
|
{
|
||
|
|
#if defined(ASIO_NO_DEPRECATED)
|
||
|
|
asio_handler_alloc_helpers::allocate(size, this_handler->handler_);
|
||
|
|
return asio_handler_allocate_is_no_longer_used();
|
||
|
|
#else // defined(ASIO_NO_DEPRECATED)
|
||
|
|
return asio_handler_alloc_helpers::allocate(
|
||
|
|
size, this_handler->handler_);
|
||
|
|
#endif // defined(ASIO_NO_DEPRECATED)
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename AsyncReadStream, typename MutableBufferSequence,
|
||
|
|
typename MutableBufferIterator, typename CompletionCondition,
|
||
|
|
typename ReadHandler>
|
||
|
|
inline asio_handler_deallocate_is_deprecated
|
||
|
|
asio_handler_deallocate(void* pointer, std::size_t size,
|
||
|
|
read_op<AsyncReadStream, MutableBufferSequence, MutableBufferIterator,
|
||
|
|
CompletionCondition, ReadHandler>* this_handler)
|
||
|
|
{
|
||
|
|
asio_handler_alloc_helpers::deallocate(
|
||
|
|
pointer, size, this_handler->handler_);
|
||
|
|
#if defined(ASIO_NO_DEPRECATED)
|
||
|
|
return asio_handler_deallocate_is_no_longer_used();
|
||
|
|
#endif // defined(ASIO_NO_DEPRECATED)
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename AsyncReadStream, typename MutableBufferSequence,
|
||
|
|
typename MutableBufferIterator, typename CompletionCondition,
|
||
|
|
typename ReadHandler>
|
||
|
|
inline bool asio_handler_is_continuation(
|
||
|
|
read_op<AsyncReadStream, MutableBufferSequence, MutableBufferIterator,
|
||
|
|
CompletionCondition, ReadHandler>* this_handler)
|
||
|
|
{
|
||
|
|
return this_handler->start_ == 0 ? true
|
||
|
|
: asio_handler_cont_helpers::is_continuation(
|
||
|
|
this_handler->handler_);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename Function, typename AsyncReadStream,
|
||
|
|
typename MutableBufferSequence, typename MutableBufferIterator,
|
||
|
|
typename CompletionCondition, typename ReadHandler>
|
||
|
|
inline asio_handler_invoke_is_deprecated
|
||
|
|
asio_handler_invoke(Function& function,
|
||
|
|
read_op<AsyncReadStream, MutableBufferSequence, MutableBufferIterator,
|
||
|
|
CompletionCondition, ReadHandler>* this_handler)
|
||
|
|
{
|
||
|
|
asio_handler_invoke_helpers::invoke(
|
||
|
|
function, this_handler->handler_);
|
||
|
|
#if defined(ASIO_NO_DEPRECATED)
|
||
|
|
return asio_handler_invoke_is_no_longer_used();
|
||
|
|
#endif // defined(ASIO_NO_DEPRECATED)
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename Function, typename AsyncReadStream,
|
||
|
|
typename MutableBufferSequence, typename MutableBufferIterator,
|
||
|
|
typename CompletionCondition, typename ReadHandler>
|
||
|
|
inline asio_handler_invoke_is_deprecated
|
||
|
|
asio_handler_invoke(const Function& function,
|
||
|
|
read_op<AsyncReadStream, MutableBufferSequence, MutableBufferIterator,
|
||
|
|
CompletionCondition, ReadHandler>* this_handler)
|
||
|
|
{
|
||
|
|
asio_handler_invoke_helpers::invoke(
|
||
|
|
function, this_handler->handler_);
|
||
|
|
#if defined(ASIO_NO_DEPRECATED)
|
||
|
|
return asio_handler_invoke_is_no_longer_used();
|
||
|
|
#endif // defined(ASIO_NO_DEPRECATED)
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename AsyncReadStream, typename MutableBufferSequence,
|
||
|
|
typename MutableBufferIterator, typename CompletionCondition,
|
||
|
|
typename ReadHandler>
|
||
|
|
inline void start_read_op(AsyncReadStream& stream,
|
||
|
|
const MutableBufferSequence& buffers, const MutableBufferIterator&,
|
||
|
|
CompletionCondition& completion_condition, ReadHandler& handler)
|
||
|
|
{
|
||
|
|
read_op<AsyncReadStream, MutableBufferSequence,
|
||
|
|
MutableBufferIterator, CompletionCondition, ReadHandler>(
|
||
|
|
stream, buffers, completion_condition, handler)(
|
||
|
|
asio::error_code(), 0, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename AsyncReadStream>
|
||
|
|
class initiate_async_read
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
typedef typename AsyncReadStream::executor_type executor_type;
|
||
|
|
|
||
|
|
explicit initiate_async_read(AsyncReadStream& stream)
|
||
|
|
: stream_(stream)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
executor_type get_executor() const ASIO_NOEXCEPT
|
||
|
|
{
|
||
|
|
return stream_.get_executor();
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename ReadHandler, typename MutableBufferSequence,
|
||
|
|
typename CompletionCondition>
|
||
|
|
void operator()(ASIO_MOVE_ARG(ReadHandler) handler,
|
||
|
|
const MutableBufferSequence& buffers,
|
||
|
|
ASIO_MOVE_ARG(CompletionCondition) completion_cond) const
|
||
|
|
{
|
||
|
|
// If you get an error on the following line it means that your handler
|
||
|
|
// does not meet the documented type requirements for a ReadHandler.
|
||
|
|
ASIO_READ_HANDLER_CHECK(ReadHandler, handler) type_check;
|
||
|
|
|
||
|
|
non_const_lvalue<ReadHandler> handler2(handler);
|
||
|
|
non_const_lvalue<CompletionCondition> completion_cond2(completion_cond);
|
||
|
|
start_read_op(stream_, buffers,
|
||
|
|
asio::buffer_sequence_begin(buffers),
|
||
|
|
completion_cond2.value, handler2.value);
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
AsyncReadStream& stream_;
|
||
|
|
};
|
||
|
|
} // namespace detail
|
||
|
|
|
||
|
|
#if !defined(GENERATING_DOCUMENTATION)
|
||
|
|
|
||
|
|
template <template <typename, typename> class Associator,
|
||
|
|
typename AsyncReadStream, typename MutableBufferSequence,
|
||
|
|
typename MutableBufferIterator, typename CompletionCondition,
|
||
|
|
typename ReadHandler, typename DefaultCandidate>
|
||
|
|
struct associator<Associator,
|
||
|
|
detail::read_op<AsyncReadStream, MutableBufferSequence,
|
||
|
|
MutableBufferIterator, CompletionCondition, ReadHandler>,
|
||
|
|
DefaultCandidate>
|
||
|
|
: Associator<ReadHandler, DefaultCandidate>
|
||
|
|
{
|
||
|
|
static typename Associator<ReadHandler, DefaultCandidate>::type
|
||
|
|
get(const detail::read_op<AsyncReadStream, MutableBufferSequence,
|
||
|
|
MutableBufferIterator, CompletionCondition, ReadHandler>& h)
|
||
|
|
ASIO_NOEXCEPT
|
||
|
|
{
|
||
|
|
return Associator<ReadHandler, DefaultCandidate>::get(h.handler_);
|
||
|
|
}
|
||
|
|
|
||
|
|
static ASIO_AUTO_RETURN_TYPE_PREFIX2(
|
||
|
|
typename Associator<ReadHandler, DefaultCandidate>::type)
|
||
|
|
get(const detail::read_op<AsyncReadStream, MutableBufferSequence,
|
||
|
|
MutableBufferIterator, CompletionCondition, ReadHandler>& h,
|
||
|
|
const DefaultCandidate& c) ASIO_NOEXCEPT
|
||
|
|
ASIO_AUTO_RETURN_TYPE_SUFFIX((
|
||
|
|
Associator<ReadHandler, DefaultCandidate>::get(h.handler_, c)))
|
||
|
|
{
|
||
|
|
return Associator<ReadHandler, DefaultCandidate>::get(h.handler_, c);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // !defined(GENERATING_DOCUMENTATION)
|
||
|
|
|
||
|
|
template <typename AsyncReadStream,
|
||
|
|
typename MutableBufferSequence, typename CompletionCondition,
|
||
|
|
ASIO_COMPLETION_TOKEN_FOR(void (asio::error_code,
|
||
|
|
std::size_t)) ReadToken>
|
||
|
|
inline ASIO_INITFN_AUTO_RESULT_TYPE_PREFIX(ReadToken,
|
||
|
|
void (asio::error_code, std::size_t))
|
||
|
|
async_read(AsyncReadStream& s, const MutableBufferSequence& buffers,
|
||
|
|
CompletionCondition completion_condition,
|
||
|
|
ASIO_MOVE_ARG(ReadToken) token,
|
||
|
|
typename constraint<
|
||
|
|
is_mutable_buffer_sequence<MutableBufferSequence>::value
|
||
|
|
>::type)
|
||
|
|
ASIO_INITFN_AUTO_RESULT_TYPE_SUFFIX((
|
||
|
|
async_initiate<ReadToken,
|
||
|
|
void (asio::error_code, std::size_t)>(
|
||
|
|
declval<detail::initiate_async_read<AsyncReadStream> >(),
|
||
|
|
token, buffers,
|
||
|
|
ASIO_MOVE_CAST(CompletionCondition)(completion_condition))))
|
||
|
|
{
|
||
|
|
return async_initiate<ReadToken,
|
||
|
|
void (asio::error_code, std::size_t)>(
|
||
|
|
detail::initiate_async_read<AsyncReadStream>(s),
|
||
|
|
token, buffers,
|
||
|
|
ASIO_MOVE_CAST(CompletionCondition)(completion_condition));
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename AsyncReadStream, typename MutableBufferSequence,
|
||
|
|
ASIO_COMPLETION_TOKEN_FOR(void (asio::error_code,
|
||
|
|
std::size_t)) ReadToken>
|
||
|
|
inline ASIO_INITFN_AUTO_RESULT_TYPE_PREFIX(ReadToken,
|
||
|
|
void (asio::error_code, std::size_t))
|
||
|
|
async_read(AsyncReadStream& s, const MutableBufferSequence& buffers,
|
||
|
|
ASIO_MOVE_ARG(ReadToken) token,
|
||
|
|
typename constraint<
|
||
|
|
is_mutable_buffer_sequence<MutableBufferSequence>::value
|
||
|
|
>::type)
|
||
|
|
ASIO_INITFN_AUTO_RESULT_TYPE_SUFFIX((
|
||
|
|
async_initiate<ReadToken,
|
||
|
|
void (asio::error_code, std::size_t)>(
|
||
|
|
declval<detail::initiate_async_read<AsyncReadStream> >(),
|
||
|
|
token, buffers, transfer_all())))
|
||
|
|
{
|
||
|
|
return async_initiate<ReadToken,
|
||
|
|
void (asio::error_code, std::size_t)>(
|
||
|
|
detail::initiate_async_read<AsyncReadStream>(s),
|
||
|
|
token, buffers, transfer_all());
|
||
|
|
}
|
||
|
|
|
||
|
|
#if !defined(ASIO_NO_DYNAMIC_BUFFER_V1)
|
||
|
|
|
||
|
|
namespace detail
|
||
|
|
{
|
||
|
|
template <typename AsyncReadStream, typename DynamicBuffer_v1,
|
||
|
|
typename CompletionCondition, typename ReadHandler>
|
||
|
|
class read_dynbuf_v1_op
|
||
|
|
: public base_from_cancellation_state<ReadHandler>,
|
||
|
|
base_from_completion_cond<CompletionCondition>
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
template <typename BufferSequence>
|
||
|
|
read_dynbuf_v1_op(AsyncReadStream& stream,
|
||
|
|
ASIO_MOVE_ARG(BufferSequence) buffers,
|
||
|
|
CompletionCondition& completion_condition, ReadHandler& handler)
|
||
|
|
: base_from_cancellation_state<ReadHandler>(
|
||
|
|
handler, enable_partial_cancellation()),
|
||
|
|
base_from_completion_cond<CompletionCondition>(completion_condition),
|
||
|
|
stream_(stream),
|
||
|
|
buffers_(ASIO_MOVE_CAST(BufferSequence)(buffers)),
|
||
|
|
start_(0),
|
||
|
|
total_transferred_(0),
|
||
|
|
handler_(ASIO_MOVE_CAST(ReadHandler)(handler))
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
#if defined(ASIO_HAS_MOVE)
|
||
|
|
read_dynbuf_v1_op(const read_dynbuf_v1_op& other)
|
||
|
|
: base_from_cancellation_state<ReadHandler>(other),
|
||
|
|
base_from_completion_cond<CompletionCondition>(other),
|
||
|
|
stream_(other.stream_),
|
||
|
|
buffers_(other.buffers_),
|
||
|
|
start_(other.start_),
|
||
|
|
total_transferred_(other.total_transferred_),
|
||
|
|
handler_(other.handler_)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
read_dynbuf_v1_op(read_dynbuf_v1_op&& other)
|
||
|
|
: base_from_cancellation_state<ReadHandler>(
|
||
|
|
ASIO_MOVE_CAST(base_from_cancellation_state<
|
||
|
|
ReadHandler>)(other)),
|
||
|
|
base_from_completion_cond<CompletionCondition>(
|
||
|
|
ASIO_MOVE_CAST(base_from_completion_cond<
|
||
|
|
CompletionCondition>)(other)),
|
||
|
|
stream_(other.stream_),
|
||
|
|
buffers_(ASIO_MOVE_CAST(DynamicBuffer_v1)(other.buffers_)),
|
||
|
|
start_(other.start_),
|
||
|
|
total_transferred_(other.total_transferred_),
|
||
|
|
handler_(ASIO_MOVE_CAST(ReadHandler)(other.handler_))
|
||
|
|
{
|
||
|
|
}
|
||
|
|
#endif // defined(ASIO_HAS_MOVE)
|
||
|
|
|
||
|
|
void operator()(asio::error_code ec,
|
||
|
|
std::size_t bytes_transferred, int start = 0)
|
||
|
|
{
|
||
|
|
std::size_t max_size, bytes_available;
|
||
|
|
switch (start_ = start)
|
||
|
|
{
|
||
|
|
case 1:
|
||
|
|
max_size = this->check_for_completion(ec, total_transferred_);
|
||
|
|
bytes_available = std::min<std::size_t>(
|
||
|
|
std::max<std::size_t>(512,
|
||
|
|
buffers_.capacity() - buffers_.size()),
|
||
|
|
std::min<std::size_t>(max_size,
|
||
|
|
buffers_.max_size() - buffers_.size()));
|
||
|
|
for (;;)
|
||
|
|
{
|
||
|
|
{
|
||
|
|
ASIO_HANDLER_LOCATION((__FILE__, __LINE__, "async_read"));
|
||
|
|
stream_.async_read_some(buffers_.prepare(bytes_available),
|
||
|
|
ASIO_MOVE_CAST(read_dynbuf_v1_op)(*this));
|
||
|
|
}
|
||
|
|
return; default:
|
||
|
|
total_transferred_ += bytes_transferred;
|
||
|
|
buffers_.commit(bytes_transferred);
|
||
|
|
max_size = this->check_for_completion(ec, total_transferred_);
|
||
|
|
bytes_available = std::min<std::size_t>(
|
||
|
|
std::max<std::size_t>(512,
|
||
|
|
buffers_.capacity() - buffers_.size()),
|
||
|
|
std::min<std::size_t>(max_size,
|
||
|
|
buffers_.max_size() - buffers_.size()));
|
||
|
|
if ((!ec && bytes_transferred == 0) || bytes_available == 0)
|
||
|
|
break;
|
||
|
|
if (this->cancelled() != cancellation_type::none)
|
||
|
|
{
|
||
|
|
ec = error::operation_aborted;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
ASIO_MOVE_OR_LVALUE(ReadHandler)(handler_)(
|
||
|
|
static_cast<const asio::error_code&>(ec),
|
||
|
|
static_cast<const std::size_t&>(total_transferred_));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//private:
|
||
|
|
AsyncReadStream& stream_;
|
||
|
|
DynamicBuffer_v1 buffers_;
|
||
|
|
int start_;
|
||
|
|
std::size_t total_transferred_;
|
||
|
|
ReadHandler handler_;
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename AsyncReadStream, typename DynamicBuffer_v1,
|
||
|
|
typename CompletionCondition, typename ReadHandler>
|
||
|
|
inline asio_handler_allocate_is_deprecated
|
||
|
|
asio_handler_allocate(std::size_t size,
|
||
|
|
read_dynbuf_v1_op<AsyncReadStream, DynamicBuffer_v1,
|
||
|
|
CompletionCondition, ReadHandler>* this_handler)
|
||
|
|
{
|
||
|
|
#if defined(ASIO_NO_DEPRECATED)
|
||
|
|
asio_handler_alloc_helpers::allocate(size, this_handler->handler_);
|
||
|
|
return asio_handler_allocate_is_no_longer_used();
|
||
|
|
#else // defined(ASIO_NO_DEPRECATED)
|
||
|
|
return asio_handler_alloc_helpers::allocate(
|
||
|
|
size, this_handler->handler_);
|
||
|
|
#endif // defined(ASIO_NO_DEPRECATED)
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename AsyncReadStream, typename DynamicBuffer_v1,
|
||
|
|
typename CompletionCondition, typename ReadHandler>
|
||
|
|
inline asio_handler_deallocate_is_deprecated
|
||
|
|
asio_handler_deallocate(void* pointer, std::size_t size,
|
||
|
|
read_dynbuf_v1_op<AsyncReadStream, DynamicBuffer_v1,
|
||
|
|
CompletionCondition, ReadHandler>* this_handler)
|
||
|
|
{
|
||
|
|
asio_handler_alloc_helpers::deallocate(
|
||
|
|
pointer, size, this_handler->handler_);
|
||
|
|
#if defined(ASIO_NO_DEPRECATED)
|
||
|
|
return asio_handler_deallocate_is_no_longer_used();
|
||
|
|
#endif // defined(ASIO_NO_DEPRECATED)
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename AsyncReadStream, typename DynamicBuffer_v1,
|
||
|
|
typename CompletionCondition, typename ReadHandler>
|
||
|
|
inline bool asio_handler_is_continuation(
|
||
|
|
read_dynbuf_v1_op<AsyncReadStream, DynamicBuffer_v1,
|
||
|
|
CompletionCondition, ReadHandler>* this_handler)
|
||
|
|
{
|
||
|
|
return this_handler->start_ == 0 ? true
|
||
|
|
: asio_handler_cont_helpers::is_continuation(
|
||
|
|
this_handler->handler_);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename Function, typename AsyncReadStream,
|
||
|
|
typename DynamicBuffer_v1, typename CompletionCondition,
|
||
|
|
typename ReadHandler>
|
||
|
|
inline asio_handler_invoke_is_deprecated
|
||
|
|
asio_handler_invoke(Function& function,
|
||
|
|
read_dynbuf_v1_op<AsyncReadStream, DynamicBuffer_v1,
|
||
|
|
CompletionCondition, ReadHandler>* this_handler)
|
||
|
|
{
|
||
|
|
asio_handler_invoke_helpers::invoke(
|
||
|
|
function, this_handler->handler_);
|
||
|
|
#if defined(ASIO_NO_DEPRECATED)
|
||
|
|
return asio_handler_invoke_is_no_longer_used();
|
||
|
|
#endif // defined(ASIO_NO_DEPRECATED)
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename Function, typename AsyncReadStream,
|
||
|
|
typename DynamicBuffer_v1, typename CompletionCondition,
|
||
|
|
typename ReadHandler>
|
||
|
|
inline asio_handler_invoke_is_deprecated
|
||
|
|
asio_handler_invoke(const Function& function,
|
||
|
|
read_dynbuf_v1_op<AsyncReadStream, DynamicBuffer_v1,
|
||
|
|
CompletionCondition, ReadHandler>* this_handler)
|
||
|
|
{
|
||
|
|
asio_handler_invoke_helpers::invoke(
|
||
|
|
function, this_handler->handler_);
|
||
|
|
#if defined(ASIO_NO_DEPRECATED)
|
||
|
|
return asio_handler_invoke_is_no_longer_used();
|
||
|
|
#endif // defined(ASIO_NO_DEPRECATED)
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename AsyncReadStream>
|
||
|
|
class initiate_async_read_dynbuf_v1
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
typedef typename AsyncReadStream::executor_type executor_type;
|
||
|
|
|
||
|
|
explicit initiate_async_read_dynbuf_v1(AsyncReadStream& stream)
|
||
|
|
: stream_(stream)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
executor_type get_executor() const ASIO_NOEXCEPT
|
||
|
|
{
|
||
|
|
return stream_.get_executor();
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename ReadHandler, typename DynamicBuffer_v1,
|
||
|
|
typename CompletionCondition>
|
||
|
|
void operator()(ASIO_MOVE_ARG(ReadHandler) handler,
|
||
|
|
ASIO_MOVE_ARG(DynamicBuffer_v1) buffers,
|
||
|
|
ASIO_MOVE_ARG(CompletionCondition) completion_cond) const
|
||
|
|
{
|
||
|
|
// If you get an error on the following line it means that your handler
|
||
|
|
// does not meet the documented type requirements for a ReadHandler.
|
||
|
|
ASIO_READ_HANDLER_CHECK(ReadHandler, handler) type_check;
|
||
|
|
|
||
|
|
non_const_lvalue<ReadHandler> handler2(handler);
|
||
|
|
non_const_lvalue<CompletionCondition> completion_cond2(completion_cond);
|
||
|
|
read_dynbuf_v1_op<AsyncReadStream, typename decay<DynamicBuffer_v1>::type,
|
||
|
|
CompletionCondition, typename decay<ReadHandler>::type>(
|
||
|
|
stream_, ASIO_MOVE_CAST(DynamicBuffer_v1)(buffers),
|
||
|
|
completion_cond2.value, handler2.value)(
|
||
|
|
asio::error_code(), 0, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
AsyncReadStream& stream_;
|
||
|
|
};
|
||
|
|
} // namespace detail
|
||
|
|
|
||
|
|
#if !defined(GENERATING_DOCUMENTATION)
|
||
|
|
|
||
|
|
template <template <typename, typename> class Associator,
|
||
|
|
typename AsyncReadStream, typename DynamicBuffer_v1,
|
||
|
|
typename CompletionCondition, typename ReadHandler,
|
||
|
|
typename DefaultCandidate>
|
||
|
|
struct associator<Associator,
|
||
|
|
detail::read_dynbuf_v1_op<AsyncReadStream,
|
||
|
|
DynamicBuffer_v1, CompletionCondition, ReadHandler>,
|
||
|
|
DefaultCandidate>
|
||
|
|
: Associator<ReadHandler, DefaultCandidate>
|
||
|
|
{
|
||
|
|
static typename Associator<ReadHandler, DefaultCandidate>::type
|
||
|
|
get(const detail::read_dynbuf_v1_op<AsyncReadStream, DynamicBuffer_v1,
|
||
|
|
CompletionCondition, ReadHandler>& h) ASIO_NOEXCEPT
|
||
|
|
{
|
||
|
|
return Associator<ReadHandler, DefaultCandidate>::get(h.handler_);
|
||
|
|
}
|
||
|
|
|
||
|
|
static ASIO_AUTO_RETURN_TYPE_PREFIX2(
|
||
|
|
typename Associator<ReadHandler, DefaultCandidate>::type)
|
||
|
|
get(const detail::read_dynbuf_v1_op<AsyncReadStream,
|
||
|
|
DynamicBuffer_v1, CompletionCondition, ReadHandler>& h,
|
||
|
|
const DefaultCandidate& c) ASIO_NOEXCEPT
|
||
|
|
ASIO_AUTO_RETURN_TYPE_SUFFIX((
|
||
|
|
Associator<ReadHandler, DefaultCandidate>::get(h.handler_, c)))
|
||
|
|
{
|
||
|
|
return Associator<ReadHandler, DefaultCandidate>::get(h.handler_, c);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // !defined(GENERATING_DOCUMENTATION)
|
||
|
|
|
||
|
|
template <typename AsyncReadStream, typename DynamicBuffer_v1,
|
||
|
|
ASIO_COMPLETION_TOKEN_FOR(void (asio::error_code,
|
||
|
|
std::size_t)) ReadToken>
|
||
|
|
inline ASIO_INITFN_AUTO_RESULT_TYPE_PREFIX(ReadToken,
|
||
|
|
void (asio::error_code, std::size_t))
|
||
|
|
async_read(AsyncReadStream& s,
|
||
|
|
ASIO_MOVE_ARG(DynamicBuffer_v1) buffers,
|
||
|
|
ASIO_MOVE_ARG(ReadToken) token,
|
||
|
|
typename constraint<
|
||
|
|
is_dynamic_buffer_v1<typename decay<DynamicBuffer_v1>::type>::value
|
||
|
|
>::type,
|
||
|
|
typename constraint<
|
||
|
|
!is_dynamic_buffer_v2<typename decay<DynamicBuffer_v1>::type>::value
|
||
|
|
>::type)
|
||
|
|
ASIO_INITFN_AUTO_RESULT_TYPE_SUFFIX((
|
||
|
|
async_initiate<ReadToken,
|
||
|
|
void (asio::error_code, std::size_t)>(
|
||
|
|
declval<detail::initiate_async_read_dynbuf_v1<AsyncReadStream> >(),
|
||
|
|
token, ASIO_MOVE_CAST(DynamicBuffer_v1)(buffers),
|
||
|
|
transfer_all())))
|
||
|
|
{
|
||
|
|
return async_initiate<ReadToken,
|
||
|
|
void (asio::error_code, std::size_t)>(
|
||
|
|
detail::initiate_async_read_dynbuf_v1<AsyncReadStream>(s),
|
||
|
|
token, ASIO_MOVE_CAST(DynamicBuffer_v1)(buffers),
|
||
|
|
transfer_all());
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename AsyncReadStream,
|
||
|
|
typename DynamicBuffer_v1, typename CompletionCondition,
|
||
|
|
ASIO_COMPLETION_TOKEN_FOR(void (asio::error_code,
|
||
|
|
std::size_t)) ReadToken>
|
||
|
|
inline ASIO_INITFN_AUTO_RESULT_TYPE_PREFIX(ReadToken,
|
||
|
|
void (asio::error_code, std::size_t))
|
||
|
|
async_read(AsyncReadStream& s,
|
||
|
|
ASIO_MOVE_ARG(DynamicBuffer_v1) buffers,
|
||
|
|
CompletionCondition completion_condition,
|
||
|
|
ASIO_MOVE_ARG(ReadToken) token,
|
||
|
|
typename constraint<
|
||
|
|
is_dynamic_buffer_v1<typename decay<DynamicBuffer_v1>::type>::value
|
||
|
|
>::type,
|
||
|
|
typename constraint<
|
||
|
|
!is_dynamic_buffer_v2<typename decay<DynamicBuffer_v1>::type>::value
|
||
|
|
>::type)
|
||
|
|
ASIO_INITFN_AUTO_RESULT_TYPE_SUFFIX((
|
||
|
|
async_initiate<ReadToken,
|
||
|
|
void (asio::error_code, std::size_t)>(
|
||
|
|
declval<detail::initiate_async_read_dynbuf_v1<AsyncReadStream> >(),
|
||
|
|
token, ASIO_MOVE_CAST(DynamicBuffer_v1)(buffers),
|
||
|
|
ASIO_MOVE_CAST(CompletionCondition)(completion_condition))))
|
||
|
|
{
|
||
|
|
return async_initiate<ReadToken,
|
||
|
|
void (asio::error_code, std::size_t)>(
|
||
|
|
detail::initiate_async_read_dynbuf_v1<AsyncReadStream>(s),
|
||
|
|
token, ASIO_MOVE_CAST(DynamicBuffer_v1)(buffers),
|
||
|
|
ASIO_MOVE_CAST(CompletionCondition)(completion_condition));
|
||
|
|
}
|
||
|
|
|
||
|
|
#if !defined(ASIO_NO_EXTENSIONS)
|
||
|
|
#if !defined(ASIO_NO_IOSTREAM)
|
||
|
|
|
||
|
|
template <typename AsyncReadStream, typename Allocator,
|
||
|
|
ASIO_COMPLETION_TOKEN_FOR(void (asio::error_code,
|
||
|
|
std::size_t)) ReadToken>
|
||
|
|
inline ASIO_INITFN_AUTO_RESULT_TYPE_PREFIX(ReadToken,
|
||
|
|
void (asio::error_code, std::size_t))
|
||
|
|
async_read(AsyncReadStream& s, basic_streambuf<Allocator>& b,
|
||
|
|
ASIO_MOVE_ARG(ReadToken) token)
|
||
|
|
ASIO_INITFN_AUTO_RESULT_TYPE_SUFFIX((
|
||
|
|
async_read(s, basic_streambuf_ref<Allocator>(b),
|
||
|
|
ASIO_MOVE_CAST(ReadToken)(token))))
|
||
|
|
{
|
||
|
|
return async_read(s, basic_streambuf_ref<Allocator>(b),
|
||
|
|
ASIO_MOVE_CAST(ReadToken)(token));
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename AsyncReadStream,
|
||
|
|
typename Allocator, typename CompletionCondition,
|
||
|
|
ASIO_COMPLETION_TOKEN_FOR(void (asio::error_code,
|
||
|
|
std::size_t)) ReadToken>
|
||
|
|
inline ASIO_INITFN_AUTO_RESULT_TYPE_PREFIX(ReadToken,
|
||
|
|
void (asio::error_code, std::size_t))
|
||
|
|
async_read(AsyncReadStream& s, basic_streambuf<Allocator>& b,
|
||
|
|
CompletionCondition completion_condition,
|
||
|
|
ASIO_MOVE_ARG(ReadToken) token)
|
||
|
|
ASIO_INITFN_AUTO_RESULT_TYPE_SUFFIX((
|
||
|
|
async_read(s, basic_streambuf_ref<Allocator>(b),
|
||
|
|
ASIO_MOVE_CAST(CompletionCondition)(completion_condition),
|
||
|
|
ASIO_MOVE_CAST(ReadToken)(token))))
|
||
|
|
{
|
||
|
|
return async_read(s, basic_streambuf_ref<Allocator>(b),
|
||
|
|
ASIO_MOVE_CAST(CompletionCondition)(completion_condition),
|
||
|
|
ASIO_MOVE_CAST(ReadToken)(token));
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif // !defined(ASIO_NO_IOSTREAM)
|
||
|
|
#endif // !defined(ASIO_NO_EXTENSIONS)
|
||
|
|
#endif // !defined(ASIO_NO_DYNAMIC_BUFFER_V1)
|
||
|
|
|
||
|
|
namespace detail
|
||
|
|
{
|
||
|
|
template <typename AsyncReadStream, typename DynamicBuffer_v2,
|
||
|
|
typename CompletionCondition, typename ReadHandler>
|
||
|
|
class read_dynbuf_v2_op
|
||
|
|
: public base_from_cancellation_state<ReadHandler>,
|
||
|
|
base_from_completion_cond<CompletionCondition>
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
template <typename BufferSequence>
|
||
|
|
read_dynbuf_v2_op(AsyncReadStream& stream,
|
||
|
|
ASIO_MOVE_ARG(BufferSequence) buffers,
|
||
|
|
CompletionCondition& completion_condition, ReadHandler& handler)
|
||
|
|
: base_from_cancellation_state<ReadHandler>(
|
||
|
|
handler, enable_partial_cancellation()),
|
||
|
|
base_from_completion_cond<CompletionCondition>(completion_condition),
|
||
|
|
stream_(stream),
|
||
|
|
buffers_(ASIO_MOVE_CAST(BufferSequence)(buffers)),
|
||
|
|
start_(0),
|
||
|
|
total_transferred_(0),
|
||
|
|
bytes_available_(0),
|
||
|
|
handler_(ASIO_MOVE_CAST(ReadHandler)(handler))
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
#if defined(ASIO_HAS_MOVE)
|
||
|
|
read_dynbuf_v2_op(const read_dynbuf_v2_op& other)
|
||
|
|
: base_from_cancellation_state<ReadHandler>(other),
|
||
|
|
base_from_completion_cond<CompletionCondition>(other),
|
||
|
|
stream_(other.stream_),
|
||
|
|
buffers_(other.buffers_),
|
||
|
|
start_(other.start_),
|
||
|
|
total_transferred_(other.total_transferred_),
|
||
|
|
bytes_available_(other.bytes_available_),
|
||
|
|
handler_(other.handler_)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
read_dynbuf_v2_op(read_dynbuf_v2_op&& other)
|
||
|
|
: base_from_cancellation_state<ReadHandler>(
|
||
|
|
ASIO_MOVE_CAST(base_from_cancellation_state<
|
||
|
|
ReadHandler>)(other)),
|
||
|
|
base_from_completion_cond<CompletionCondition>(
|
||
|
|
ASIO_MOVE_CAST(base_from_completion_cond<
|
||
|
|
CompletionCondition>)(other)),
|
||
|
|
stream_(other.stream_),
|
||
|
|
buffers_(ASIO_MOVE_CAST(DynamicBuffer_v2)(other.buffers_)),
|
||
|
|
start_(other.start_),
|
||
|
|
total_transferred_(other.total_transferred_),
|
||
|
|
bytes_available_(other.bytes_available_),
|
||
|
|
handler_(ASIO_MOVE_CAST(ReadHandler)(other.handler_))
|
||
|
|
{
|
||
|
|
}
|
||
|
|
#endif // defined(ASIO_HAS_MOVE)
|
||
|
|
|
||
|
|
void operator()(asio::error_code ec,
|
||
|
|
std::size_t bytes_transferred, int start = 0)
|
||
|
|
{
|
||
|
|
std::size_t max_size, pos;
|
||
|
|
switch (start_ = start)
|
||
|
|
{
|
||
|
|
case 1:
|
||
|
|
max_size = this->check_for_completion(ec, total_transferred_);
|
||
|
|
bytes_available_ = std::min<std::size_t>(
|
||
|
|
std::max<std::size_t>(512,
|
||
|
|
buffers_.capacity() - buffers_.size()),
|
||
|
|
std::min<std::size_t>(max_size,
|
||
|
|
buffers_.max_size() - buffers_.size()));
|
||
|
|
for (;;)
|
||
|
|
{
|
||
|
|
pos = buffers_.size();
|
||
|
|
buffers_.grow(bytes_available_);
|
||
|
|
{
|
||
|
|
ASIO_HANDLER_LOCATION((__FILE__, __LINE__, "async_read"));
|
||
|
|
stream_.async_read_some(buffers_.data(pos, bytes_available_),
|
||
|
|
ASIO_MOVE_CAST(read_dynbuf_v2_op)(*this));
|
||
|
|
}
|
||
|
|
return; default:
|
||
|
|
total_transferred_ += bytes_transferred;
|
||
|
|
buffers_.shrink(bytes_available_ - bytes_transferred);
|
||
|
|
max_size = this->check_for_completion(ec, total_transferred_);
|
||
|
|
bytes_available_ = std::min<std::size_t>(
|
||
|
|
std::max<std::size_t>(512,
|
||
|
|
buffers_.capacity() - buffers_.size()),
|
||
|
|
std::min<std::size_t>(max_size,
|
||
|
|
buffers_.max_size() - buffers_.size()));
|
||
|
|
if ((!ec && bytes_transferred == 0) || bytes_available_ == 0)
|
||
|
|
break;
|
||
|
|
if (this->cancelled() != cancellation_type::none)
|
||
|
|
{
|
||
|
|
ec = error::operation_aborted;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
ASIO_MOVE_OR_LVALUE(ReadHandler)(handler_)(
|
||
|
|
static_cast<const asio::error_code&>(ec),
|
||
|
|
static_cast<const std::size_t&>(total_transferred_));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//private:
|
||
|
|
AsyncReadStream& stream_;
|
||
|
|
DynamicBuffer_v2 buffers_;
|
||
|
|
int start_;
|
||
|
|
std::size_t total_transferred_;
|
||
|
|
std::size_t bytes_available_;
|
||
|
|
ReadHandler handler_;
|
||
|
|
};
|
||
|
|
|
||
|
|
template <typename AsyncReadStream, typename DynamicBuffer_v2,
|
||
|
|
typename CompletionCondition, typename ReadHandler>
|
||
|
|
inline asio_handler_allocate_is_deprecated
|
||
|
|
asio_handler_allocate(std::size_t size,
|
||
|
|
read_dynbuf_v2_op<AsyncReadStream, DynamicBuffer_v2,
|
||
|
|
CompletionCondition, ReadHandler>* this_handler)
|
||
|
|
{
|
||
|
|
#if defined(ASIO_NO_DEPRECATED)
|
||
|
|
asio_handler_alloc_helpers::allocate(size, this_handler->handler_);
|
||
|
|
return asio_handler_allocate_is_no_longer_used();
|
||
|
|
#else // defined(ASIO_NO_DEPRECATED)
|
||
|
|
return asio_handler_alloc_helpers::allocate(
|
||
|
|
size, this_handler->handler_);
|
||
|
|
#endif // defined(ASIO_NO_DEPRECATED)
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename AsyncReadStream, typename DynamicBuffer_v2,
|
||
|
|
typename CompletionCondition, typename ReadHandler>
|
||
|
|
inline asio_handler_deallocate_is_deprecated
|
||
|
|
asio_handler_deallocate(void* pointer, std::size_t size,
|
||
|
|
read_dynbuf_v2_op<AsyncReadStream, DynamicBuffer_v2,
|
||
|
|
CompletionCondition, ReadHandler>* this_handler)
|
||
|
|
{
|
||
|
|
asio_handler_alloc_helpers::deallocate(
|
||
|
|
pointer, size, this_handler->handler_);
|
||
|
|
#if defined(ASIO_NO_DEPRECATED)
|
||
|
|
return asio_handler_deallocate_is_no_longer_used();
|
||
|
|
#endif // defined(ASIO_NO_DEPRECATED)
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename AsyncReadStream, typename DynamicBuffer_v2,
|
||
|
|
typename CompletionCondition, typename ReadHandler>
|
||
|
|
inline bool asio_handler_is_continuation(
|
||
|
|
read_dynbuf_v2_op<AsyncReadStream, DynamicBuffer_v2,
|
||
|
|
CompletionCondition, ReadHandler>* this_handler)
|
||
|
|
{
|
||
|
|
return this_handler->start_ == 0 ? true
|
||
|
|
: asio_handler_cont_helpers::is_continuation(
|
||
|
|
this_handler->handler_);
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename Function, typename AsyncReadStream,
|
||
|
|
typename DynamicBuffer_v2, typename CompletionCondition,
|
||
|
|
typename ReadHandler>
|
||
|
|
inline asio_handler_invoke_is_deprecated
|
||
|
|
asio_handler_invoke(Function& function,
|
||
|
|
read_dynbuf_v2_op<AsyncReadStream, DynamicBuffer_v2,
|
||
|
|
CompletionCondition, ReadHandler>* this_handler)
|
||
|
|
{
|
||
|
|
asio_handler_invoke_helpers::invoke(
|
||
|
|
function, this_handler->handler_);
|
||
|
|
#if defined(ASIO_NO_DEPRECATED)
|
||
|
|
return asio_handler_invoke_is_no_longer_used();
|
||
|
|
#endif // defined(ASIO_NO_DEPRECATED)
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename Function, typename AsyncReadStream,
|
||
|
|
typename DynamicBuffer_v2, typename CompletionCondition,
|
||
|
|
typename ReadHandler>
|
||
|
|
inline asio_handler_invoke_is_deprecated
|
||
|
|
asio_handler_invoke(const Function& function,
|
||
|
|
read_dynbuf_v2_op<AsyncReadStream, DynamicBuffer_v2,
|
||
|
|
CompletionCondition, ReadHandler>* this_handler)
|
||
|
|
{
|
||
|
|
asio_handler_invoke_helpers::invoke(
|
||
|
|
function, this_handler->handler_);
|
||
|
|
#if defined(ASIO_NO_DEPRECATED)
|
||
|
|
return asio_handler_invoke_is_no_longer_used();
|
||
|
|
#endif // defined(ASIO_NO_DEPRECATED)
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename AsyncReadStream>
|
||
|
|
class initiate_async_read_dynbuf_v2
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
typedef typename AsyncReadStream::executor_type executor_type;
|
||
|
|
|
||
|
|
explicit initiate_async_read_dynbuf_v2(AsyncReadStream& stream)
|
||
|
|
: stream_(stream)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
executor_type get_executor() const ASIO_NOEXCEPT
|
||
|
|
{
|
||
|
|
return stream_.get_executor();
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename ReadHandler, typename DynamicBuffer_v2,
|
||
|
|
typename CompletionCondition>
|
||
|
|
void operator()(ASIO_MOVE_ARG(ReadHandler) handler,
|
||
|
|
ASIO_MOVE_ARG(DynamicBuffer_v2) buffers,
|
||
|
|
ASIO_MOVE_ARG(CompletionCondition) completion_cond) const
|
||
|
|
{
|
||
|
|
// If you get an error on the following line it means that your handler
|
||
|
|
// does not meet the documented type requirements for a ReadHandler.
|
||
|
|
ASIO_READ_HANDLER_CHECK(ReadHandler, handler) type_check;
|
||
|
|
|
||
|
|
non_const_lvalue<ReadHandler> handler2(handler);
|
||
|
|
non_const_lvalue<CompletionCondition> completion_cond2(completion_cond);
|
||
|
|
read_dynbuf_v2_op<AsyncReadStream, typename decay<DynamicBuffer_v2>::type,
|
||
|
|
CompletionCondition, typename decay<ReadHandler>::type>(
|
||
|
|
stream_, ASIO_MOVE_CAST(DynamicBuffer_v2)(buffers),
|
||
|
|
completion_cond2.value, handler2.value)(
|
||
|
|
asio::error_code(), 0, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
AsyncReadStream& stream_;
|
||
|
|
};
|
||
|
|
} // namespace detail
|
||
|
|
|
||
|
|
#if !defined(GENERATING_DOCUMENTATION)
|
||
|
|
|
||
|
|
template <template <typename, typename> class Associator,
|
||
|
|
typename AsyncReadStream, typename DynamicBuffer_v2,
|
||
|
|
typename CompletionCondition, typename ReadHandler,
|
||
|
|
typename DefaultCandidate>
|
||
|
|
struct associator<Associator,
|
||
|
|
detail::read_dynbuf_v2_op<AsyncReadStream,
|
||
|
|
DynamicBuffer_v2, CompletionCondition, ReadHandler>,
|
||
|
|
DefaultCandidate>
|
||
|
|
: Associator<ReadHandler, DefaultCandidate>
|
||
|
|
{
|
||
|
|
static typename Associator<ReadHandler, DefaultCandidate>::type
|
||
|
|
get(const detail::read_dynbuf_v2_op<AsyncReadStream, DynamicBuffer_v2,
|
||
|
|
CompletionCondition, ReadHandler>& h) ASIO_NOEXCEPT
|
||
|
|
{
|
||
|
|
return Associator<ReadHandler, DefaultCandidate>::get(h.handler_);
|
||
|
|
}
|
||
|
|
|
||
|
|
static ASIO_AUTO_RETURN_TYPE_PREFIX2(
|
||
|
|
typename Associator<ReadHandler, DefaultCandidate>::type)
|
||
|
|
get(const detail::read_dynbuf_v2_op<AsyncReadStream,
|
||
|
|
DynamicBuffer_v2, CompletionCondition, ReadHandler>& h,
|
||
|
|
const DefaultCandidate& c) ASIO_NOEXCEPT
|
||
|
|
ASIO_AUTO_RETURN_TYPE_SUFFIX((
|
||
|
|
Associator<ReadHandler, DefaultCandidate>::get(h.handler_, c)))
|
||
|
|
{
|
||
|
|
return Associator<ReadHandler, DefaultCandidate>::get(h.handler_, c);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // !defined(GENERATING_DOCUMENTATION)
|
||
|
|
|
||
|
|
template <typename AsyncReadStream, typename DynamicBuffer_v2,
|
||
|
|
ASIO_COMPLETION_TOKEN_FOR(void (asio::error_code,
|
||
|
|
std::size_t)) ReadToken>
|
||
|
|
inline ASIO_INITFN_AUTO_RESULT_TYPE_PREFIX(ReadToken,
|
||
|
|
void (asio::error_code, std::size_t))
|
||
|
|
async_read(AsyncReadStream& s, DynamicBuffer_v2 buffers,
|
||
|
|
ASIO_MOVE_ARG(ReadToken) token,
|
||
|
|
typename constraint<
|
||
|
|
is_dynamic_buffer_v2<DynamicBuffer_v2>::value
|
||
|
|
>::type)
|
||
|
|
ASIO_INITFN_AUTO_RESULT_TYPE_SUFFIX((
|
||
|
|
async_initiate<ReadToken,
|
||
|
|
void (asio::error_code, std::size_t)>(
|
||
|
|
declval<detail::initiate_async_read_dynbuf_v2<AsyncReadStream> >(),
|
||
|
|
token, ASIO_MOVE_CAST(DynamicBuffer_v2)(buffers),
|
||
|
|
transfer_all())))
|
||
|
|
{
|
||
|
|
return async_initiate<ReadToken,
|
||
|
|
void (asio::error_code, std::size_t)>(
|
||
|
|
detail::initiate_async_read_dynbuf_v2<AsyncReadStream>(s),
|
||
|
|
token, ASIO_MOVE_CAST(DynamicBuffer_v2)(buffers),
|
||
|
|
transfer_all());
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename AsyncReadStream,
|
||
|
|
typename DynamicBuffer_v2, typename CompletionCondition,
|
||
|
|
ASIO_COMPLETION_TOKEN_FOR(void (asio::error_code,
|
||
|
|
std::size_t)) ReadToken>
|
||
|
|
inline ASIO_INITFN_AUTO_RESULT_TYPE_PREFIX(ReadToken,
|
||
|
|
void (asio::error_code, std::size_t))
|
||
|
|
async_read(AsyncReadStream& s, DynamicBuffer_v2 buffers,
|
||
|
|
CompletionCondition completion_condition,
|
||
|
|
ASIO_MOVE_ARG(ReadToken) token,
|
||
|
|
typename constraint<
|
||
|
|
is_dynamic_buffer_v2<DynamicBuffer_v2>::value
|
||
|
|
>::type)
|
||
|
|
ASIO_INITFN_AUTO_RESULT_TYPE_SUFFIX((
|
||
|
|
async_initiate<ReadToken,
|
||
|
|
void (asio::error_code, std::size_t)>(
|
||
|
|
declval<detail::initiate_async_read_dynbuf_v2<AsyncReadStream> >(),
|
||
|
|
token, ASIO_MOVE_CAST(DynamicBuffer_v2)(buffers),
|
||
|
|
ASIO_MOVE_CAST(CompletionCondition)(completion_condition))))
|
||
|
|
{
|
||
|
|
return async_initiate<ReadToken,
|
||
|
|
void (asio::error_code, std::size_t)>(
|
||
|
|
detail::initiate_async_read_dynbuf_v2<AsyncReadStream>(s),
|
||
|
|
token, ASIO_MOVE_CAST(DynamicBuffer_v2)(buffers),
|
||
|
|
ASIO_MOVE_CAST(CompletionCondition)(completion_condition));
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace asio
|
||
|
|
|
||
|
|
#include "asio/detail/pop_options.hpp"
|
||
|
|
|
||
|
|
#endif // ASIO_IMPL_READ_HPP
|