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.
63 lines
1.5 KiB
C++
63 lines
1.5 KiB
C++
/*
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* Copyright (c) 2024, Andrew Kaster <akaster@serenityos.org>
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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/Atomic.h>
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#include <AK/Platform.h>
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#include <AK/String.h>
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#include <LibCore/MachPort.h>
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#include <LibThreading/Forward.h>
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#include <LibWebView/Forward.h>
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#if !defined(AK_OS_MACH)
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# error "This file is only for Mach kernel-based OS's"
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#endif
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namespace WebView {
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class WEBVIEW_API MachPortServer {
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public:
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MachPortServer();
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~MachPortServer();
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void start();
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void stop();
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bool is_initialized();
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struct ChildMachPortRegistration {
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pid_t pid { -1 };
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Core::MachPort child_port;
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Core::MachPort reply_port;
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};
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Function<void(ChildMachPortRegistration)> on_receive_child_mach_port;
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struct BackingStoresMessage {
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pid_t pid { -1 };
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u64 page_id { 0 };
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i32 front_backing_store_id { 0 };
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i32 back_backing_store_id { 0 };
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Core::MachPort front_backing_store_port;
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Core::MachPort back_backing_store_port;
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};
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Function<void(BackingStoresMessage)> on_receive_backing_stores;
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ByteString const& server_port_name() const { return m_server_port_name; }
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private:
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void thread_loop();
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ErrorOr<void> allocate_server_port();
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NonnullRefPtr<Threading::Thread> m_thread;
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ByteString const m_server_port_name;
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Core::MachPort m_server_port_recv_right;
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Core::MachPort m_server_port_send_right;
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Atomic<bool> m_should_stop { false };
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};
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}
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