4ea4d63008
On macOS, use Mach port messaging instead of Unix domain sockets for all IPC transport. This makes the transport capable of carrying Mach port rights as message attachments, which is a prerequisite for sending IOSurface handles over the main IPC channel (currently sent via a separate out-of-band path). It also avoids the need for the FD acknowledgement protocol that TransportSocket requires, since Mach port right transfers are atomic in the kernel. Three connection establishment patterns: - Spawned helper processes (WebContent, RequestServer, etc.) use the existing MachPortServer: the child sends its task port with a reply port, and the parent responds with a pre-created port pair. - Socket-bootstrapped connections (WebDriver, BrowserProcess) exchange Mach port names over the socket, then drop the socket. - Pre-created pairs for IPC tests and in-message transport transfer. Attachment on macOS now wraps a MachPort instead of a file descriptor, converting between the two via fileport_makeport()/fileport_makefd(). The LibIPC socket transport tests are disabled on macOS since they are socket-specific.
57 lines
1.6 KiB
C++
57 lines
1.6 KiB
C++
/*
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* Copyright (c) 2026, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
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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/HashMap.h>
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#include <AK/Platform.h>
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#include <AK/StringView.h>
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#include <AK/Variant.h>
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#if !defined(AK_OS_MACH)
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# error "TransportBootstrapMach is only available on Mach platforms"
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#endif
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#include <LibCore/MachPort.h>
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#include <LibCore/Socket.h>
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#include <LibThreading/Mutex.h>
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namespace IPC {
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struct TransportBootstrapMachPorts {
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Core::MachPort receive_right;
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Core::MachPort send_right;
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};
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ErrorOr<TransportBootstrapMachPorts> bootstrap_transport_from_mach_server(StringView server_name);
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ErrorOr<TransportBootstrapMachPorts> bootstrap_transport_from_server_port(Core::MachPort const& server_port);
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ErrorOr<TransportBootstrapMachPorts> bootstrap_transport_over_socket(Core::LocalSocket&);
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class TransportBootstrapMachServer {
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AK_MAKE_NONCOPYABLE(TransportBootstrapMachServer);
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public:
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TransportBootstrapMachServer() = default;
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void register_pending_transport(pid_t, TransportBootstrapMachPorts);
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void register_reply_port(pid_t, Core::MachPort reply_port);
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private:
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struct WaitingForPorts {
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TransportBootstrapMachPorts ports;
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};
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struct WaitingForReplyPort {
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Core::MachPort reply_port;
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};
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using PendingBootstrapState = Variant<WaitingForPorts, WaitingForReplyPort>;
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static void send_transport_ports_to_child(Core::MachPort reply_port, TransportBootstrapMachPorts ports);
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Threading::Mutex m_pending_bootstrap_mutex;
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HashMap<pid_t, PendingBootstrapState> m_pending_bootstrap;
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};
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}
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