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b3b7e76c10
At some point, we stopped ever constructing invalid messages. This makes that clearer, and will allow us to stop requiring that IPC arguments be default-constructible.
78 lines
1.5 KiB
C++
78 lines
1.5 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <andreas@ladybird.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 <LibCore/System.h>
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#include <LibIPC/Transport.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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(void)Core::System::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(Transport& transport);
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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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#ifdef AK_OS_WINDOWS
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Vector<size_t> m_handle_offsets;
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#endif
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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 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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