| // Copyright 2018 The Dawn Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef SRC_DAWN_NATIVE_RESOURCEMEMORYALLOCATION_H_ |
| #define SRC_DAWN_NATIVE_RESOURCEMEMORYALLOCATION_H_ |
| |
| #include <cstdint> |
| |
| namespace dawn::native { |
| |
| class ResourceHeapBase; |
| |
| // Allocation method determines how memory was sub-divided. |
| // Used by the device to get the allocator that was responsible for the allocation. |
| enum class AllocationMethod { |
| // Memory not sub-divided. |
| kDirect, |
| |
| // Memory sub-divided using one or more blocks of various sizes. |
| kSubAllocated, |
| |
| // Memory was allocated outside of Dawn. |
| kExternal, |
| |
| // Memory not allocated or freed. |
| kInvalid |
| }; |
| |
| // Metadata that describes how the allocation was allocated. |
| struct AllocationInfo { |
| // AllocationInfo contains a separate offset to not confuse block vs memory offsets. |
| // The block offset is within the entire allocator memory range and only required by the |
| // buddy sub-allocator to get the corresponding memory. Unlike the block offset, the |
| // allocation offset is always local to the memory. |
| uint64_t mBlockOffset = 0; |
| |
| AllocationMethod mMethod = AllocationMethod::kInvalid; |
| }; |
| |
| // Handle into a resource heap pool. |
| class ResourceMemoryAllocation { |
| public: |
| ResourceMemoryAllocation(); |
| ResourceMemoryAllocation(const AllocationInfo& info, |
| uint64_t offset, |
| ResourceHeapBase* resourceHeap, |
| uint8_t* mappedPointer = nullptr); |
| virtual ~ResourceMemoryAllocation() = default; |
| |
| ResourceMemoryAllocation(const ResourceMemoryAllocation&) = default; |
| ResourceMemoryAllocation& operator=(const ResourceMemoryAllocation&) = default; |
| |
| ResourceHeapBase* GetResourceHeap() const; |
| uint64_t GetOffset() const; |
| uint8_t* GetMappedPointer() const; |
| AllocationInfo GetInfo() const; |
| |
| virtual void Invalidate(); |
| |
| private: |
| AllocationInfo mInfo; |
| uint64_t mOffset; |
| ResourceHeapBase* mResourceHeap; |
| uint8_t* mMappedPointer; |
| }; |
| } // namespace dawn::native |
| |
| #endif // SRC_DAWN_NATIVE_RESOURCEMEMORYALLOCATION_H_ |