Common/ObjectPool.c (C89) keeps objects of one class in chunks, the first
made at backend start: a freed object is pushed on a lock-free stack, an
allocation takes the stack whole (an exchange, so no ABA) and pushes the
rest back, or else takes the chunks' next slot. A pool destroyed with
objects still out is freed with the last of them. Classes take it with
OBJECT_POOL_MEMBERS / OBJECT_POOL_DEFINE: VKPipeline, VKShader,
VKTexture, VKFramebuffer and the vertex loaders, which are now their
own bucket list nodes. Vulkan's descriptor pool and cleanup lists get
their first room at boot.
Play allocations: 58 to 1 on the core's thread, 172 to 1 on the compile
workers (both a first use).
Of it, the backends read the EFB scale, now passed as the backbuffer
scale; GLContext::Create tested for libretro, its only context; and
the controller interface kept a render window that is always null. The
video backends' Initialize, InitBackendInfo and PopulateBackendInfo,
Core::Init, EmuThread and StartEmuThread, BootCore and the controller
interface lose the parameter; PrepareWindow, ChangeWindow, the window
change refresh and the Vulkan instance's surface extensions go, as
nothing presents but the frontend.
The frontend owns the window and presents, so the D3D11, D3D12 and
Vulkan backends draw their picture into a FrameOutput, a render target
the frontend reads where it is, rather than a swap chain. D3D11 hands
over one texture at pixel shader slot 0. D3D12 negotiates version 2 of
its interface and keeps one texture per sync index, handed over with
the fence its picture completes on, falling back to set_texture on
version 1. Vulkan keeps one image per sync index and hands it over with
set_image, so the fake swap chain and the WSI calls hooked under it are
gone, and the device may come without a surface. The outputs are RGBA8
and report that format to the presenter.
The DXGI and Vulkan swap chains, the backends' standalone device
creation and exclusive fullscreen are removed.
The whole ownership model was getting a bit of a mess, with a some
of special cases to deal with. And I'm planning to make it even more
complex in the future.
So here is some upfront work to convert it over to reference counted
pointers.
The former is deprecated and pretty much all modern drivers
support VK_EXT_debug_utils.
Android drivers dont support it. On those drivers,
we use the implementation provided by the validation layers.
SPDX standardizes how source code conveys its copyright and licensing
information. See https://spdx.github.io/spdx-spec/1-rationale/ . SPDX
tags are adopted in many large projects, including things like the Linux
kernel.
LibretroAdmin