mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-08-16 08:50:26 +03:00
c92f8ab1ea
Using mmap-allocated memory for backing stores does not allow us to benefit from using GPU-accelerated painting, because all the performance increase we get is mostly negated by reading the GPU-allocated texture back into RAM, so it can be shared with the browser process. With IOSurface, we get a framebuffer that is both shareable between processes and can be used as underlying memory for an OpenGL/Metal texture. This change does not yet benefit from using IOSurface and merely wraps them into Gfx::Bitmap to be used by the CPU painter.
106 lines
4.5 KiB
C++
106 lines
4.5 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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#include "MachPortServer.h"
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#include <AK/Debug.h>
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#include <LibCore/Platform/MachMessageTypes.h>
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#include <LibCore/Platform/ProcessStatisticsMach.h>
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namespace Ladybird {
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MachPortServer::MachPortServer()
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: m_thread(Threading::Thread::construct([this]() -> intptr_t { thread_loop(); return 0; }, "MachPortServer"sv))
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, m_server_port_name(ByteString::formatted("org.SerenityOS.Ladybird.helper.{}", getpid()))
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{
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if (auto err = allocate_server_port(); err.is_error())
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dbgln("Failed to allocate server port: {}", err.error());
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else
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start();
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}
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MachPortServer::~MachPortServer()
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{
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stop();
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}
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void MachPortServer::start()
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{
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m_thread->start();
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}
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void MachPortServer::stop()
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{
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// FIXME: We should join instead (after storing should_stop = false) when we have a way to interrupt the thread's mach_msg call
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m_thread->detach();
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m_should_stop.store(true, MemoryOrder::memory_order_release);
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}
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bool MachPortServer::is_initialized()
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{
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return MACH_PORT_VALID(m_server_port_recv_right.port()) && MACH_PORT_VALID(m_server_port_send_right.port());
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}
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ErrorOr<void> MachPortServer::allocate_server_port()
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{
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m_server_port_recv_right = TRY(Core::MachPort::create_with_right(Core::MachPort::PortRight::Receive));
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m_server_port_send_right = TRY(m_server_port_recv_right.insert_right(Core::MachPort::MessageRight::MakeSend));
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TRY(m_server_port_recv_right.register_with_bootstrap_server(m_server_port_name));
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dbgln_if(MACH_PORT_DEBUG, "Success! we created and attached mach port {:x} to bootstrap server with name {}", m_server_port_recv_right.port(), m_server_port_name);
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return {};
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}
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void MachPortServer::thread_loop()
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{
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while (!m_should_stop.load(MemoryOrder::memory_order_acquire)) {
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Core::Platform::ReceivedMachMessage message {};
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// Get the pid of the child from the audit trailer so we can associate the port w/it
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mach_msg_options_t const options = MACH_RCV_MSG | MACH_RCV_TRAILER_TYPE(MACH_RCV_TRAILER_AUDIT) | MACH_RCV_TRAILER_ELEMENTS(MACH_RCV_TRAILER_AUDIT);
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// FIXME: How can we interrupt this call during application shutdown?
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auto const ret = mach_msg(&message.header, options, 0, sizeof(message), m_server_port_recv_right.port(), MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL);
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if (ret != KERN_SUCCESS) {
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dbgln("mach_msg failed: {}", mach_error_string(ret));
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break;
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}
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if (message.header.msgh_id == Core::Platform::BACKING_STORE_IOSURFACES_MESSAGE_ID) {
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auto pid = static_cast<pid_t>(message.body.parent_iosurface.trailer.msgh_audit.val[5]);
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auto const& backing_stores_message = message.body.parent_iosurface;
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auto front_child_port = Core::MachPort::adopt_right(backing_stores_message.front_descriptor.name, Core::MachPort::PortRight::Send);
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auto back_child_port = Core::MachPort::adopt_right(backing_stores_message.back_descriptor.name, Core::MachPort::PortRight::Send);
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auto const& metadata = backing_stores_message.metadata;
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if (on_receive_backing_stores)
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on_receive_backing_stores({ .pid = pid,
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.page_id = metadata.page_id,
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.front_backing_store_id = metadata.front_backing_store_id,
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.back_backing_store_id = metadata.back_backing_store_id,
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.front_backing_store_port = move(front_child_port),
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.back_backing_store_port = move(back_child_port) });
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continue;
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}
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if (message.header.msgh_id == Core::Platform::SELF_TASK_PORT_MESSAGE_ID) {
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if (MACH_MSGH_BITS_LOCAL(message.header.msgh_bits) != MACH_MSG_TYPE_MOVE_SEND) {
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dbgln("Received message with invalid local port rights {}, ignoring", MACH_MSGH_BITS_LOCAL(message.header.msgh_bits));
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continue;
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}
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auto const& task_port_message = message.body.parent;
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auto pid = static_cast<pid_t>(task_port_message.trailer.msgh_audit.val[5]);
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auto child_port = Core::MachPort::adopt_right(task_port_message.port_descriptor.name, Core::MachPort::PortRight::Send);
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dbgln_if(MACH_PORT_DEBUG, "Received child port {:x} from pid {}", child_port.port(), pid);
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if (on_receive_child_mach_port)
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on_receive_child_mach_port(pid, move(child_port));
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continue;
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}
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dbgln("Received message with id {}, ignoring", message.header.msgh_id);
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}
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}
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}
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