RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-26 12:37:45 +00:00
Code Issues Activity Actions

Kernel: Make kernel region allocators return KResultOr<NOP<Region>>

Browse source 
This expands the reach of error propagation greatly throughout the
kernel. Sadly, it also exposes the fact that we're allocating (and
doing other fallible things) in constructors all over the place.

This patch doesn't attempt to address that of course. That's work for
our future selves.
This commit is contained in:
Andreas Kling 2021-09-06 01:36:14 +02:00
parent cb71a73708
commit 75564b4a5f
40 changed files with 173 additions and 193 deletions
Download patch file Download diff file Expand all files Collapse all files

7
Kernel/Graphics/VirtIOGPU/FrameBufferDevice.cpp
View file

@ -35,7 +35,7 @@ KResult FrameBufferDevice::create_framebuffer()
// Allocate frame buffer for both front and back
auto& info = display_info();
m_buffer_size = calculate_framebuffer_size(info.rect.width, info.rect.height);
m_framebuffer = MM.allocate_kernel_region(m_buffer_size * 2, String::formatted("VirtGPU FrameBuffer #{}", m_scanout.value()), Memory::Region::Access::ReadWrite, AllocationStrategy::AllocateNow);
m_framebuffer = TRY(MM.allocate_kernel_region(m_buffer_size * 2, String::formatted("VirtGPU FrameBuffer #{}", m_scanout.value()), Memory::Region::Access::ReadWrite, AllocationStrategy::AllocateNow));
auto write_sink_page = MM.allocate_user_physical_page(Memory::MemoryManager::ShouldZeroFill::No).release_nonnull();
auto num_needed_pages = m_framebuffer->vmobject().page_count();
@ -43,10 +43,7 @@ KResult FrameBufferDevice::create_framebuffer()
for (auto i = 0u; i < num_needed_pages; ++i) {
pages.append(write_sink_page);
}
auto maybe_framebuffer_sink_vmobject = Memory::AnonymousVMObject::try_create_with_physical_pages(pages.span());
if (maybe_framebuffer_sink_vmobject.is_error())
return maybe_framebuffer_sink_vmobject.error();
m_framebuffer_sink_vmobject = maybe_framebuffer_sink_vmobject.release_value();
m_framebuffer_sink_vmobject = TRY(Memory::AnonymousVMObject::try_create_with_physical_pages(pages.span()));
MutexLocker locker(m_gpu.operation_lock());
m_current_buffer = &buffer_from_index(m_last_set_buffer_index.load());