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da6b928909
Replace IPC::File / AutoCloseFileDescriptor / MessageFileType in the IPC message pipeline with a new IPC::Attachment class. This wraps a file descriptor transferred alongside IPC messages, and provides a clean extension point for platform-specific transport mechanisms (e.g., Mach ports on macOS) that will be introduced later.
56 lines
1.2 KiB
C++
56 lines
1.2 KiB
C++
/*
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* Copyright (c) 2024, Tim Flynn <trflynn89@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibIPC/Limits.h>
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#include <LibIPC/Message.h>
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namespace IPC {
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MessageBuffer::MessageBuffer()
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{
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}
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ErrorOr<void> MessageBuffer::extend_data_capacity(size_t capacity)
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{
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TRY(m_data.try_ensure_capacity(m_data.size() + capacity));
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return {};
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}
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ErrorOr<void> MessageBuffer::append_data(u8 const* values, size_t count)
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{
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TRY(m_data.try_append(values, count));
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return {};
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}
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ErrorOr<void> MessageBuffer::append_file_descriptor(int fd)
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{
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TRY(m_attachments.try_append(Attachment::from_fd(fd)));
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return {};
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}
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ErrorOr<void> MessageBuffer::append_attachment(Attachment attachment)
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{
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TRY(m_attachments.try_append(move(attachment)));
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return {};
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}
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ErrorOr<void> MessageBuffer::extend(MessageBuffer&& buffer)
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{
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TRY(m_data.try_extend(move(buffer.m_data)));
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TRY(m_attachments.try_extend(move(buffer.m_attachments)));
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return {};
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}
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ErrorOr<void> MessageBuffer::transfer_message(Transport& transport)
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{
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VERIFY(m_data.size() <= MAX_MESSAGE_PAYLOAD_SIZE);
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VERIFY(m_attachments.size() <= MAX_MESSAGE_FD_COUNT);
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transport.post_message(m_data, m_attachments);
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return {};
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}
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}
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