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 #include "dawn_native/PooledResourceMemoryAllocator.h" 16 #include "dawn_native/Device.h" 17 18 namespace dawn_native { 19 PooledResourceMemoryAllocator(ResourceHeapAllocator * heapAllocator)20 PooledResourceMemoryAllocator::PooledResourceMemoryAllocator( 21 ResourceHeapAllocator* heapAllocator) 22 : mHeapAllocator(heapAllocator) { 23 } 24 DestroyPool()25 void PooledResourceMemoryAllocator::DestroyPool() { 26 for (auto& resourceHeap : mPool) { 27 ASSERT(resourceHeap != nullptr); 28 mHeapAllocator->DeallocateResourceHeap(std::move(resourceHeap)); 29 } 30 31 mPool.clear(); 32 } 33 34 ResultOrError<std::unique_ptr<ResourceHeapBase>> AllocateResourceHeap(uint64_t size)35 PooledResourceMemoryAllocator::AllocateResourceHeap(uint64_t size) { 36 // Pooled memory is LIFO because memory can be evicted by LRU. However, this means 37 // pooling is disabled in-frame when the memory is still pending. For high in-frame 38 // memory users, FIFO might be preferable when memory consumption is a higher priority. 39 std::unique_ptr<ResourceHeapBase> memory; 40 if (!mPool.empty()) { 41 memory = std::move(mPool.front()); 42 mPool.pop_front(); 43 } 44 45 if (memory == nullptr) { 46 DAWN_TRY_ASSIGN(memory, mHeapAllocator->AllocateResourceHeap(size)); 47 } 48 49 return std::move(memory); 50 } 51 DeallocateResourceHeap(std::unique_ptr<ResourceHeapBase> allocation)52 void PooledResourceMemoryAllocator::DeallocateResourceHeap( 53 std::unique_ptr<ResourceHeapBase> allocation) { 54 mPool.push_front(std::move(allocation)); 55 } 56 GetPoolSizeForTesting() const57 uint64_t PooledResourceMemoryAllocator::GetPoolSizeForTesting() const { 58 return mPool.size(); 59 } 60 } // namespace dawn_native 61