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//
// windows/random_access_handle_service.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2018 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 ASIO_WINDOWS_RANDOM_ACCESS_HANDLE_SERVICE_HPP
#define ASIO_WINDOWS_RANDOM_ACCESS_HANDLE_SERVICE_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include "asio/detail/config.hpp"
#if defined(ASIO_ENABLE_OLD_SERVICES)
#if defined(ASIO_HAS_WINDOWS_RANDOM_ACCESS_HANDLE) \
|| defined(GENERATING_DOCUMENTATION)
#include <cstddef>
#include "asio/async_result.hpp"
#include "asio/detail/cstdint.hpp"
#include "asio/detail/win_iocp_handle_service.hpp"
#include "asio/error.hpp"
#include "asio/io_context.hpp"
#include "asio/detail/push_options.hpp"
namespace asio {
namespace windows {
/// Default service implementation for a random-access handle.
class random_access_handle_service
#if defined(GENERATING_DOCUMENTATION)
: public asio::io_context::service
#else
: public asio::detail::service_base<random_access_handle_service>
#endif
{
public:
#if defined(GENERATING_DOCUMENTATION)
/// The unique service identifier.
static asio::io_context::id id;
#endif
private:
// The type of the platform-specific implementation.
typedef detail::win_iocp_handle_service service_impl_type;
public:
/// The type of a random-access handle implementation.
#if defined(GENERATING_DOCUMENTATION)
typedef implementation_defined implementation_type;
#else
typedef service_impl_type::implementation_type implementation_type;
#endif
/// The native handle type.
#if defined(GENERATING_DOCUMENTATION)
typedef implementation_defined native_handle_type;
#else
typedef service_impl_type::native_handle_type native_handle_type;
#endif
/// Construct a new random-access handle service for the specified io_context.
explicit random_access_handle_service(asio::io_context& io_context)
: asio::detail::service_base<
random_access_handle_service>(io_context),
service_impl_(io_context)
{
}
/// Construct a new random-access handle implementation.
void construct(implementation_type& impl)
{
service_impl_.construct(impl);
}
#if defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
/// Move-construct a new random-access handle implementation.
void move_construct(implementation_type& impl,
implementation_type& other_impl)
{
service_impl_.move_construct(impl, other_impl);
}
/// Move-assign from another random-access handle implementation.
void move_assign(implementation_type& impl,
random_access_handle_service& other_service,
implementation_type& other_impl)
{
service_impl_.move_assign(impl, other_service.service_impl_, other_impl);
}
#endif // defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
/// Destroy a random-access handle implementation.
void destroy(implementation_type& impl)
{
service_impl_.destroy(impl);
}
/// Assign an existing native handle to a random-access handle.
ASIO_SYNC_OP_VOID assign(implementation_type& impl,
const native_handle_type& handle, asio::error_code& ec)
{
service_impl_.assign(impl, handle, ec);
ASIO_SYNC_OP_VOID_RETURN(ec);
}
/// Determine whether the handle is open.
bool is_open(const implementation_type& impl) const
{
return service_impl_.is_open(impl);
}
/// Close a random-access handle implementation.
ASIO_SYNC_OP_VOID close(implementation_type& impl,
asio::error_code& ec)
{
service_impl_.close(impl, ec);
ASIO_SYNC_OP_VOID_RETURN(ec);
}
/// Get the native handle implementation.
native_handle_type native_handle(implementation_type& impl)
{
return service_impl_.native_handle(impl);
}
/// Cancel all asynchronous operations associated with the handle.
ASIO_SYNC_OP_VOID cancel(implementation_type& impl,
asio::error_code& ec)
{
service_impl_.cancel(impl, ec);
ASIO_SYNC_OP_VOID_RETURN(ec);
}
/// Write the given data at the specified offset.
template <typename ConstBufferSequence>
std::size_t write_some_at(implementation_type& impl, uint64_t offset,
const ConstBufferSequence& buffers, asio::error_code& ec)
{
return service_impl_.write_some_at(impl, offset, buffers, ec);
}
/// Start an asynchronous write at the specified offset.
template <typename ConstBufferSequence, typename WriteHandler>
ASIO_INITFN_RESULT_TYPE(WriteHandler,
void (asio::error_code, std::size_t))
async_write_some_at(implementation_type& impl,
uint64_t offset, const ConstBufferSequence& buffers,
ASIO_MOVE_ARG(WriteHandler) handler)
{
asio::async_completion<WriteHandler,
void (asio::error_code, std::size_t)> init(handler);
service_impl_.async_write_some_at(impl,
offset, buffers, init.completion_handler);
return init.result.get();
}
/// Read some data from the specified offset.
template <typename MutableBufferSequence>
std::size_t read_some_at(implementation_type& impl, uint64_t offset,
const MutableBufferSequence& buffers, asio::error_code& ec)
{
return service_impl_.read_some_at(impl, offset, buffers, ec);
}
/// Start an asynchronous read at the specified offset.
template <typename MutableBufferSequence, typename ReadHandler>
ASIO_INITFN_RESULT_TYPE(ReadHandler,
void (asio::error_code, std::size_t))
async_read_some_at(implementation_type& impl,
uint64_t offset, const MutableBufferSequence& buffers,
ASIO_MOVE_ARG(ReadHandler) handler)
{
asio::async_completion<ReadHandler,
void (asio::error_code, std::size_t)> init(handler);
service_impl_.async_read_some_at(impl,
offset, buffers, init.completion_handler);
return init.result.get();
}
private:
// Destroy all user-defined handler objects owned by the service.
void shutdown()
{
service_impl_.shutdown();
}
// The platform-specific implementation.
service_impl_type service_impl_;
};
} // namespace windows
} // namespace asio
#include "asio/detail/pop_options.hpp"
#endif // defined(ASIO_HAS_WINDOWS_RANDOM_ACCESS_HANDLE)
// || defined(GENERATING_DOCUMENTATION)
#endif // defined(ASIO_ENABLE_OLD_SERVICES)
#endif // ASIO_WINDOWS_RANDOM_ACCESS_HANDLE_SERVICE_HPP
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