1 // Copyright 2020 The Dawn Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef DAWNNATIVE_POOLEDRESOURCEMEMORYALLOCATOR_H_ 16 #define DAWNNATIVE_POOLEDRESOURCEMEMORYALLOCATOR_H_ 17 18 #include "common/SerialQueue.h" 19 #include "dawn_native/ResourceHeapAllocator.h" 20 21 #include <deque> 22 23 namespace dawn_native { 24 25 class DeviceBase; 26 27 // |PooledResourceMemoryAllocator| allocates a fixed-size resource memory from a resource memory 28 // pool. Internally, it manages a list of heaps using LIFO (newest heaps are recycled first). 29 // The heap is in one of two states: AVAILABLE or not. Upon de-allocate, the heap is returned 30 // the pool and made AVAILABLE. 31 class PooledResourceMemoryAllocator : public ResourceHeapAllocator { 32 public: 33 PooledResourceMemoryAllocator(ResourceHeapAllocator* heapAllocator); 34 ~PooledResourceMemoryAllocator() override = default; 35 36 ResultOrError<std::unique_ptr<ResourceHeapBase>> AllocateResourceHeap( 37 uint64_t size) override; 38 void DeallocateResourceHeap(std::unique_ptr<ResourceHeapBase> allocation) override; 39 40 void DestroyPool(); 41 42 // For testing purposes. 43 uint64_t GetPoolSizeForTesting() const; 44 45 private: 46 ResourceHeapAllocator* mHeapAllocator = nullptr; 47 48 std::deque<std::unique_ptr<ResourceHeapBase>> mPool; 49 }; 50 51 } // namespace dawn_native 52 53 #endif // DAWNNATIVE_POOLEDRESOURCEMEMORYALLOCATOR_H_ 54