ipc/handle_attachment_win.h

// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef IPC_HANDLE_ATTACHMENT_WIN_H_
#define IPC_HANDLE_ATTACHMENT_WIN_H_

#include <stdint.h>

#include "base/win/scoped_handle.h"
#include "ipc/handle_win.h"
#include "ipc/ipc_export.h"
#include "ipc/ipc_message_attachment.h"

namespace IPC {
namespace internal {

// This class represents a Windows HANDLE attached to a Chrome IPC message.
class IPC_EXPORT HandleAttachmentWin : public MessageAttachment {
 public:
  // This constructor makes a copy of |handle| and takes ownership of the
  // result. Should only be called by the sender of a Chrome IPC message.
  explicit HandleAttachmentWin(const HANDLE& handle);

  enum FromWire {
    FROM_WIRE,
  };
  // This constructor takes ownership of |handle|. Should only be called by the
  // receiver of a Chrome IPC message.
  HandleAttachmentWin(const HANDLE& handle, FromWire from_wire);

  // MessageAttachment interface.
  Type GetType() const override;

  HANDLE Take() { return handle_.Take(); }

 private:
  ~HandleAttachmentWin() override;

  base::win::ScopedHandle handle_;
};

}  // namespace internal
}  // namespace IPC

#endif  // IPC_HANDLE_ATTACHMENT_WIN_H_