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ec9cf2a85c
But keep a namespace alias to avoid breaking project that depend on the previous namespace name while they get updated. Done with through the following steps: - git grep -l dawn_native:: | xargs sed -i "" "s/dawn_native::/dawn::native::/g" - git grep -l "namespace dawn_native" | xargs sed -i "" "s/namespace dawn_native/namespace dawn::native/g" - git cl format - Manual fixups in generator/templates (and the addition of namespace_case in dawn_json_generator.py). - The addition of the namespace alias in DawnNative.h Bug: dawn:824 Change-Id: I676cc4e3ced2e0e4bab32a0d66d7eaf9537e3f09 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/75982 Reviewed-by: Loko Kung <lokokung@google.com> Commit-Queue: Corentin Wallez <cwallez@chromium.org> Auto-Submit: Corentin Wallez <cwallez@chromium.org>
121 lines
4.5 KiB
C++
121 lines
4.5 KiB
C++
// Copyright 2019 The Dawn Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "dawn_native/BuddyMemoryAllocator.h"
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#include "common/Math.h"
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#include "dawn_native/ResourceHeapAllocator.h"
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namespace dawn::native {
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BuddyMemoryAllocator::BuddyMemoryAllocator(uint64_t maxSystemSize,
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uint64_t memoryBlockSize,
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ResourceHeapAllocator* heapAllocator)
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: mMemoryBlockSize(memoryBlockSize),
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mBuddyBlockAllocator(maxSystemSize),
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mHeapAllocator(heapAllocator) {
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ASSERT(memoryBlockSize <= maxSystemSize);
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ASSERT(IsPowerOfTwo(mMemoryBlockSize));
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ASSERT(maxSystemSize % mMemoryBlockSize == 0);
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mTrackedSubAllocations.resize(maxSystemSize / mMemoryBlockSize);
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}
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uint64_t BuddyMemoryAllocator::GetMemoryIndex(uint64_t offset) const {
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ASSERT(offset != BuddyAllocator::kInvalidOffset);
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return offset / mMemoryBlockSize;
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}
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ResultOrError<ResourceMemoryAllocation> BuddyMemoryAllocator::Allocate(uint64_t allocationSize,
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uint64_t alignment) {
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ResourceMemoryAllocation invalidAllocation = ResourceMemoryAllocation{};
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if (allocationSize == 0) {
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return std::move(invalidAllocation);
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}
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// Check the unaligned size to avoid overflowing NextPowerOfTwo.
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if (allocationSize > mMemoryBlockSize) {
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return std::move(invalidAllocation);
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}
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// Round allocation size to nearest power-of-two.
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allocationSize = NextPowerOfTwo(allocationSize);
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// Allocation cannot exceed the memory size.
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if (allocationSize > mMemoryBlockSize) {
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return std::move(invalidAllocation);
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}
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// Attempt to sub-allocate a block of the requested size.
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const uint64_t blockOffset = mBuddyBlockAllocator.Allocate(allocationSize, alignment);
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if (blockOffset == BuddyAllocator::kInvalidOffset) {
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return std::move(invalidAllocation);
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}
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const uint64_t memoryIndex = GetMemoryIndex(blockOffset);
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if (mTrackedSubAllocations[memoryIndex].refcount == 0) {
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// Transfer ownership to this allocator
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std::unique_ptr<ResourceHeapBase> memory;
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DAWN_TRY_ASSIGN(memory, mHeapAllocator->AllocateResourceHeap(mMemoryBlockSize));
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mTrackedSubAllocations[memoryIndex] = {/*refcount*/ 0, std::move(memory)};
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}
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mTrackedSubAllocations[memoryIndex].refcount++;
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AllocationInfo info;
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info.mBlockOffset = blockOffset;
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info.mMethod = AllocationMethod::kSubAllocated;
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// Allocation offset is always local to the memory.
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const uint64_t memoryOffset = blockOffset % mMemoryBlockSize;
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return ResourceMemoryAllocation{
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info, memoryOffset, mTrackedSubAllocations[memoryIndex].mMemoryAllocation.get()};
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}
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void BuddyMemoryAllocator::Deallocate(const ResourceMemoryAllocation& allocation) {
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const AllocationInfo info = allocation.GetInfo();
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ASSERT(info.mMethod == AllocationMethod::kSubAllocated);
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const uint64_t memoryIndex = GetMemoryIndex(info.mBlockOffset);
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ASSERT(mTrackedSubAllocations[memoryIndex].refcount > 0);
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mTrackedSubAllocations[memoryIndex].refcount--;
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if (mTrackedSubAllocations[memoryIndex].refcount == 0) {
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mHeapAllocator->DeallocateResourceHeap(
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std::move(mTrackedSubAllocations[memoryIndex].mMemoryAllocation));
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}
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mBuddyBlockAllocator.Deallocate(info.mBlockOffset);
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}
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uint64_t BuddyMemoryAllocator::GetMemoryBlockSize() const {
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return mMemoryBlockSize;
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}
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uint64_t BuddyMemoryAllocator::ComputeTotalNumOfHeapsForTesting() const {
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uint64_t count = 0;
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for (const TrackedSubAllocations& allocation : mTrackedSubAllocations) {
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if (allocation.refcount > 0) {
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count++;
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}
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}
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return count;
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}
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} // namespace dawn::native
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