ladybird/Libraries/LibIPC/Message.h
Timothy Flynn fd6d868ae2 LibIPC: Add some type aliases and MessageBuffer helpers
To re-use some of these wordy types outside of LibIPC, let's add some
aliases.
2025-07-18 10:09:02 -04:00

71 lines
1.6 KiB
C++

/*
* Copyright (c) 2018-2020, Andreas Kling <andreas@ladybird.org>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Error.h>
#include <AK/Vector.h>
#include <LibIPC/AutoCloseFileDescriptor.h>
#include <LibIPC/Forward.h>
#include <LibIPC/Transport.h>
namespace IPC {
class MessageBuffer {
public:
MessageBuffer();
MessageBuffer(MessageDataType data, MessageFileType fds)
: m_data(move(data))
, m_fds(move(fds))
{
}
ErrorOr<void> extend_data_capacity(size_t capacity);
ErrorOr<void> append_data(u8 const* values, size_t count);
ErrorOr<void> append_file_descriptor(int fd);
ErrorOr<void> extend(MessageBuffer&& buffer);
ErrorOr<void> transfer_message(Transport& transport);
MessageDataType const& data() const { return m_data; }
MessageDataType take_data() { return move(m_data); }
MessageFileType const& fds() const { return m_fds; }
MessageFileType take_fds() { return move(m_fds); }
private:
MessageDataType m_data;
MessageFileType m_fds;
#ifdef AK_OS_WINDOWS
Vector<size_t> m_handle_offsets;
#endif
};
enum class ErrorCode : u32 {
PeerDisconnected
};
template<typename Value>
using IPCErrorOr = ErrorOr<Value, ErrorCode>;
class Message {
public:
virtual ~Message() = default;
virtual u32 endpoint_magic() const = 0;
virtual int message_id() const = 0;
virtual char const* message_name() const = 0;
virtual ErrorOr<MessageBuffer> encode() const = 0;
protected:
Message() = default;
};
}