serenity/Ladybird/MachPortServer.h
Andrew Kaster 8c5e64e686 Ladybird+LibWebView: Add mechanism to get Mach task port for helpers
On macOS, it's not trivial to get a Mach task port for your children.
This implementation registers the chrome process as a well-known
service with launchd based on its pid, and lets each child process
send over a reference to its mach_task_self() back to the chrome.

We'll need this Mach task port right to get process statistics.
2024-04-09 16:43:27 -06:00

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/*
* Copyright (c) 2024, Andrew Kaster <akaster@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Platform.h>
#if !defined(AK_OS_MACH)
# error "This file is only for Mach kernel-based OS's"
#endif
#include <AK/Atomic.h>
#include <AK/String.h>
#include <LibCore/MachPort.h>
#include <LibThreading/Thread.h>
namespace Ladybird {
class MachPortServer {
public:
MachPortServer();
~MachPortServer();
void start();
void stop();
bool is_initialized();
Function<void(pid_t, Core::MachPort)> on_receive_child_mach_port;
ByteString const& server_port_name() const { return m_server_port_name; }
private:
void thread_loop();
ErrorOr<void> allocate_server_port();
NonnullRefPtr<Threading::Thread> m_thread;
ByteString const m_server_port_name;
Core::MachPort m_server_port_recv_right;
Core::MachPort m_server_port_send_right;
Atomic<bool> m_should_stop { false };
};
}