mojo/public/cpp/bindings/lib/control_message_handler.h

// 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 MOJO_PUBLIC_CPP_BINDINGS_LIB_CONTROL_MESSAGE_HANDLER_H_
#define MOJO_PUBLIC_CPP_BINDINGS_LIB_CONTROL_MESSAGE_HANDLER_H_

#include <stdint.h>

#include "base/component_export.h"
#include "base/memory/raw_ptr_exclusion.h"
#include "mojo/public/cpp/bindings/message.h"

namespace mojo {

class InterfaceEndpointClient;

namespace internal {

// Handlers for request messages defined in interface_control_messages.mojom.
class COMPONENT_EXPORT(MOJO_CPP_BINDINGS) ControlMessageHandler
    : public MessageReceiverWithResponderStatus {
 public:
  static bool IsControlMessage(const Message* message);

  ControlMessageHandler(InterfaceEndpointClient* owner,
                        uint32_t interface_version);

  ControlMessageHandler(const ControlMessageHandler&) = delete;
  ControlMessageHandler& operator=(const ControlMessageHandler&) = delete;

  ~ControlMessageHandler() override;

  // Call the following methods only if IsControlMessage() returned true.
  bool Accept(Message* message) override;
  bool AcceptWithResponder(
      Message* message,
      std::unique_ptr<MessageReceiverWithStatus> responder) override;

 private:
  bool Run(Message* message,
           std::unique_ptr<MessageReceiverWithStatus> responder);
  bool RunOrClosePipe(Message* message);

  // RAW_PTR_EXCLUSION: Performance reasons (based on analysis of speedometer3).
  RAW_PTR_EXCLUSION InterfaceEndpointClient* const owner_ = nullptr;
  uint32_t interface_version_;
};

}  // namespace internal
}  // namespace mojo

#endif  // MOJO_PUBLIC_CPP_BINDINGS_LIB_CONTROL_MESSAGE_HANDLER_H_