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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef IPC_IPC_MESSAGE_ATTACHMENT_H_
#define IPC_IPC_MESSAGE_ATTACHMENT_H_
#include "base/memory/ref_counted.h"
#include "base/pickle.h"
#include "build/build_config.h"
#include "ipc/ipc_message_support_export.h"
#include "mojo/public/cpp/system/handle.h"
namespace IPC {
// Auxiliary data sent with |Message|. This can be a platform file descriptor
// or a mojo |MessagePipe|. |GetType()| returns the type of the subclass.
class IPC_MESSAGE_SUPPORT_EXPORT MessageAttachment
: public base::Pickle::Attachment {
public:
enum class Type {
MOJO_HANDLE,
PLATFORM_FILE,
WIN_HANDLE,
MACH_PORT,
FUCHSIA_HANDLE,
};
static scoped_refptr<MessageAttachment> CreateFromMojoHandle(
mojo::ScopedHandle handle,
Type type);
MessageAttachment(const MessageAttachment&) = delete;
MessageAttachment& operator=(const MessageAttachment&) = delete;
virtual Type GetType() const = 0;
mojo::ScopedHandle TakeMojoHandle();
protected:
friend class base::RefCountedThreadSafe<MessageAttachment>;
MessageAttachment();
~MessageAttachment() override;
};
} // namespace IPC
#endif // IPC_IPC_MESSAGE_ATTACHMENT_H_