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https://github.com/SerenityOS/serenity
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3b05c81070
The expectation with these messages is that no other code is allowed to run while we're waiting for the response to arrive. Not meeting this requirement did not degrade any (observable) functionality, however.
76 lines
1.5 KiB
C++
76 lines
1.5 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2022, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Error.h>
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#include <AK/RefCounted.h>
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#include <AK/RefPtr.h>
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#include <AK/Vector.h>
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#include <LibCore/Forward.h>
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#include <unistd.h>
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namespace IPC {
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class AutoCloseFileDescriptor : public RefCounted<AutoCloseFileDescriptor> {
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public:
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AutoCloseFileDescriptor(int fd)
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: m_fd(fd)
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{
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}
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~AutoCloseFileDescriptor()
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{
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if (m_fd != -1)
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close(m_fd);
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}
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int value() const { return m_fd; }
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private:
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int m_fd;
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};
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class MessageBuffer {
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public:
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MessageBuffer();
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ErrorOr<void> extend_data_capacity(size_t capacity);
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ErrorOr<void> append_data(u8 const* values, size_t count);
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ErrorOr<void> append_file_descriptor(int fd);
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ErrorOr<void> transfer_message(Core::LocalSocket& socket, bool block_event_loop = false);
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private:
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Vector<u8, 1024> m_data;
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Vector<NonnullRefPtr<AutoCloseFileDescriptor>, 1> m_fds;
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};
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enum class ErrorCode : u32 {
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PeerDisconnected
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};
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template<typename Value>
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using IPCErrorOr = ErrorOr<Value, ErrorCode>;
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class Message {
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public:
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virtual ~Message() = default;
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virtual u32 endpoint_magic() const = 0;
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virtual int message_id() const = 0;
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virtual char const* message_name() const = 0;
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virtual bool valid() const = 0;
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virtual ErrorOr<MessageBuffer> encode() const = 0;
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protected:
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Message() = default;
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};
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}
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