Initial Commit

include/asio/detail/win_iocp_operation.hpp

@@ -0,0 +1,96 @@
+//
+// detail/win_iocp_operation.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2025 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);
+  }
+
+  void reset()
+  {
+    Internal = 0;
+    InternalHigh = 0;
+    Offset = 0;
+    OffsetHigh = 0;
+    hEvent = 0;
+    ready_ = 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()
+  {
+  }
+
+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