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// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <lib/fidl/cpp/message.h>
#include <zircon/types.h>
namespace fidl {
namespace internal {
// An interface for receiving FIDL messages.
// Used by |MessageReader| to call back into its client whenever it reads a
// message from the channel.
class MessageHandler {
virtual ~MessageHandler();
// A new message has arrived.
// The memory backing the message will remain valid until this method returns,
// at which point the memory might or might not be deallocated.
virtual zx_status_t OnMessage(Message message) = 0;
// The channel from which the messages were being read is gone.
// The channel's peer might have been closed or the |MessageReader| might have
// unbound from the channel. In either case, implementations that keep
// per-channel state should reset their state when this method is called.
virtual void OnChannelGone();
} // namespace internal
} // namespace fidl