fade63b58e
Allow using the abstraction from the OpenGL backend.
227 lines
8.7 KiB
C++
227 lines
8.7 KiB
C++
// Copyright 2018 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <algorithm>
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#include <bit>
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#include <optional>
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#include <tuple>
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#include <vector>
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#include "common/alignment.h"
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#include "common/assert.h"
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#include "common/common_types.h"
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#include "common/logging/log.h"
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#include "video_core/vulkan_common/vulkan_device.h"
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#include "video_core/vulkan_common/vulkan_memory_allocator.h"
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#include "video_core/vulkan_common/vulkan_wrapper.h"
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namespace Vulkan {
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namespace {
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struct Range {
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u64 begin;
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u64 end;
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[[nodiscard]] bool Contains(u64 iterator, u64 size) const noexcept {
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return iterator < end && begin < iterator + size;
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}
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};
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[[nodiscard]] u64 GetAllocationChunkSize(u64 required_size) {
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static constexpr std::array sizes{
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0x1000ULL << 10, 0x1400ULL << 10, 0x1800ULL << 10, 0x1c00ULL << 10, 0x2000ULL << 10,
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0x3200ULL << 10, 0x4000ULL << 10, 0x6000ULL << 10, 0x8000ULL << 10, 0xA000ULL << 10,
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0x10000ULL << 10, 0x18000ULL << 10, 0x20000ULL << 10,
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};
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static_assert(std::is_sorted(sizes.begin(), sizes.end()));
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const auto it = std::ranges::lower_bound(sizes, required_size);
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return it != sizes.end() ? *it : Common::AlignUp(required_size, 4ULL << 20);
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}
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} // Anonymous namespace
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class MemoryAllocation {
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public:
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explicit MemoryAllocation(const Device& device_, vk::DeviceMemory memory_,
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VkMemoryPropertyFlags properties_, u64 allocation_size_, u32 type_)
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: device{device_}, memory{std::move(memory_)}, properties{properties_},
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allocation_size{allocation_size_}, shifted_type{ShiftType(type_)} {}
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[[nodiscard]] std::optional<MemoryCommit> Commit(VkDeviceSize size, VkDeviceSize alignment) {
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const std::optional<u64> alloc = FindFreeRegion(size, alignment);
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if (!alloc) {
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// Signal out of memory, it'll try to do more allocations.
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return std::nullopt;
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}
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const Range range{
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.begin = *alloc,
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.end = *alloc + size,
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};
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commits.insert(std::ranges::upper_bound(commits, *alloc, {}, &Range::begin), range);
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return std::make_optional<MemoryCommit>(device, this, *memory, *alloc, *alloc + size);
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}
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void Free(u64 begin) {
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const auto it = std::ranges::find(commits, begin, &Range::begin);
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ASSERT_MSG(it != commits.end(), "Invalid commit");
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commits.erase(it);
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}
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[[nodiscard]] std::span<u8> Map() {
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if (!memory_mapped_span.empty()) {
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return memory_mapped_span;
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}
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u8* const raw_pointer = memory.Map(0, allocation_size);
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memory_mapped_span = std::span<u8>(raw_pointer, allocation_size);
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return memory_mapped_span;
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}
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/// Returns whether this allocation is compatible with the arguments.
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[[nodiscard]] bool IsCompatible(VkMemoryPropertyFlags wanted_properties, u32 type_mask) const {
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return (wanted_properties & properties) && (type_mask & shifted_type) != 0;
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}
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private:
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[[nodiscard]] static constexpr u32 ShiftType(u32 type) {
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return 1U << type;
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}
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[[nodiscard]] std::optional<u64> FindFreeRegion(u64 size, u64 alignment) noexcept {
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ASSERT(std::has_single_bit(alignment));
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const u64 alignment_log2 = std::countr_zero(alignment);
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std::optional<u64> candidate;
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u64 iterator = 0;
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auto commit = commits.begin();
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while (iterator + size <= allocation_size) {
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candidate = candidate.value_or(iterator);
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if (commit == commits.end()) {
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break;
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}
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if (commit->Contains(*candidate, size)) {
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candidate = std::nullopt;
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}
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iterator = Common::AlignUpLog2(commit->end, alignment_log2);
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++commit;
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}
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return candidate;
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}
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const Device& device; ///< Vulkan device.
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const vk::DeviceMemory memory; ///< Vulkan memory allocation handler.
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const VkMemoryPropertyFlags properties; ///< Vulkan properties.
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const u64 allocation_size; ///< Size of this allocation.
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const u32 shifted_type; ///< Stored Vulkan type of this allocation, shifted.
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std::vector<Range> commits; ///< All commit ranges done from this allocation.
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std::span<u8> memory_mapped_span; ///< Memory mapped span. Empty if not queried before.
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};
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MemoryCommit::MemoryCommit(const Device& device_, MemoryAllocation* allocation_,
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VkDeviceMemory memory_, u64 begin, u64 end) noexcept
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: device{&device_}, allocation{allocation_}, memory{memory_}, interval{begin, end} {}
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MemoryCommit::~MemoryCommit() {
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Release();
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}
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MemoryCommit& MemoryCommit::operator=(MemoryCommit&& rhs) noexcept {
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Release();
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device = rhs.device;
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allocation = std::exchange(rhs.allocation, nullptr);
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memory = rhs.memory;
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interval = rhs.interval;
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span = std::exchange(rhs.span, std::span<u8>{});
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return *this;
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}
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MemoryCommit::MemoryCommit(MemoryCommit&& rhs) noexcept
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: device{rhs.device}, allocation{std::exchange(rhs.allocation, nullptr)}, memory{rhs.memory},
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interval{rhs.interval}, span{std::exchange(rhs.span, std::span<u8>{})} {}
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std::span<u8> MemoryCommit::Map() {
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if (!span.empty()) {
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return span;
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}
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span = allocation->Map().subspan(interval.first, interval.second - interval.first);
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return span;
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}
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void MemoryCommit::Release() {
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if (allocation) {
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allocation->Free(interval.first);
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}
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}
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MemoryAllocator::MemoryAllocator(const Device& device_)
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: device{device_}, properties{device_.GetPhysical().GetMemoryProperties()} {}
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MemoryAllocator::~MemoryAllocator() = default;
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MemoryCommit MemoryAllocator::Commit(const VkMemoryRequirements& requirements, bool host_visible) {
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const u64 chunk_size = GetAllocationChunkSize(requirements.size);
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// When a host visible commit is asked, search for host visible and coherent, otherwise search
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// for a fast device local type.
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const VkMemoryPropertyFlags wanted_properties =
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host_visible ? VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT
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: VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT;
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if (std::optional<MemoryCommit> commit = TryAllocCommit(requirements, wanted_properties)) {
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return std::move(*commit);
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}
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// Commit has failed, allocate more memory.
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// TODO(Rodrigo): Handle out of memory situations in some way like flushing to guest memory.
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AllocMemory(wanted_properties, requirements.memoryTypeBits, chunk_size);
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// Commit again, this time it won't fail since there's a fresh allocation above.
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// If it does, there's a bug.
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return TryAllocCommit(requirements, wanted_properties).value();
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}
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MemoryCommit MemoryAllocator::Commit(const vk::Buffer& buffer, bool host_visible) {
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auto commit = Commit(device.GetLogical().GetBufferMemoryRequirements(*buffer), host_visible);
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buffer.BindMemory(commit.Memory(), commit.Offset());
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return commit;
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}
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MemoryCommit MemoryAllocator::Commit(const vk::Image& image, bool host_visible) {
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auto commit = Commit(device.GetLogical().GetImageMemoryRequirements(*image), host_visible);
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image.BindMemory(commit.Memory(), commit.Offset());
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return commit;
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}
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void MemoryAllocator::AllocMemory(VkMemoryPropertyFlags wanted_properties, u32 type_mask,
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u64 size) {
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const u32 type = [&] {
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for (u32 type_index = 0; type_index < properties.memoryTypeCount; ++type_index) {
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const auto flags = properties.memoryTypes[type_index].propertyFlags;
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if ((type_mask & (1U << type_index)) && (flags & wanted_properties)) {
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// The type matches in type and in the wanted properties.
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return type_index;
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}
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}
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UNREACHABLE_MSG("Couldn't find a compatible memory type!");
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return 0U;
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}();
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vk::DeviceMemory memory = device.GetLogical().AllocateMemory({
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.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO,
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.pNext = nullptr,
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.allocationSize = size,
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.memoryTypeIndex = type,
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});
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allocations.push_back(std::make_unique<MemoryAllocation>(device, std::move(memory),
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wanted_properties, size, type));
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}
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std::optional<MemoryCommit> MemoryAllocator::TryAllocCommit(
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const VkMemoryRequirements& requirements, VkMemoryPropertyFlags wanted_properties) {
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for (auto& allocation : allocations) {
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if (!allocation->IsCompatible(wanted_properties, requirements.memoryTypeBits)) {
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continue;
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}
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if (auto commit = allocation->Commit(requirements.size, requirements.alignment)) {
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return commit;
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}
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}
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return std::nullopt;
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}
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} // namespace Vulkan
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