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//
// detail/win_iocp_operation.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_DETAIL_WIN_IOCP_OPERATION_HPP
#define ASIO_DETAIL_WIN_IOCP_OPERATION_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_HAS_IOCP)
#include "asio/detail/handler_tracking.hpp"
#include "asio/detail/op_queue.hpp"
#include "asio/detail/socket_types.hpp"
#include "asio/error_code.hpp"
#include "asio/detail/push_options.hpp"
namespace asio {
namespace detail {
class win_iocp_io_context;
// Base class for all operations. A function pointer is used instead of virtual
// functions to avoid the associated overhead.
class win_iocp_operation
: public OVERLAPPED
ASIO_ALSO_INHERIT_TRACKED_HANDLER
{
public:
typedef win_iocp_operation operation_type;
void complete(void* owner, const asio::error_code& ec,
std::size_t bytes_transferred)
{
func_(owner, this, ec, bytes_transferred);
}
void destroy()
{
func_(0, this, asio::error_code(), 0);
}
protected:
typedef void (*func_type)(
void*, win_iocp_operation*,
const asio::error_code&, std::size_t);
win_iocp_operation(func_type func)
: next_(0),
func_(func)
{
reset();
}
// Prevents deletion through this type.
~win_iocp_operation()
{
}
void reset()
{
Internal = 0;
InternalHigh = 0;
Offset = 0;
OffsetHigh = 0;
hEvent = 0;
ready_ = 0;
}
private:
friend class op_queue_access;
friend class win_iocp_io_context;
win_iocp_operation* next_;
func_type func_;
long ready_;
};
} // namespace detail
} // namespace asio
#include "asio/detail/pop_options.hpp"
#endif // defined(ASIO_HAS_IOCP)
#endif // ASIO_DETAIL_WIN_IOCP_OPERATION_HPP
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