1 // Copyright 2017 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_D3D12_COMMANDALLOCATORMANAGER_H_ 16 #define DAWNNATIVE_D3D12_COMMANDALLOCATORMANAGER_H_ 17 18 #include "dawn_native/d3d12/d3d12_platform.h" 19 20 #include "common/SerialQueue.h" 21 #include "dawn_native/Error.h" 22 #include "dawn_native/IntegerTypes.h" 23 24 #include <bitset> 25 26 namespace dawn_native { namespace d3d12 { 27 28 class Device; 29 30 class CommandAllocatorManager { 31 public: 32 CommandAllocatorManager(Device* device); 33 34 // A CommandAllocator that is reserved must be used on the next ExecuteCommandLists 35 // otherwise its commands may be reset before execution has completed on the GPU 36 ResultOrError<ID3D12CommandAllocator*> ReserveCommandAllocator(); 37 MaybeError Tick(ExecutionSerial lastCompletedSerial); 38 39 private: 40 Device* device; 41 42 // This must be at least 2 because the Device and Queue use separate command allocators 43 static constexpr unsigned int kMaxCommandAllocators = 32; 44 unsigned int mAllocatorCount; 45 46 struct IndexedCommandAllocator { 47 ComPtr<ID3D12CommandAllocator> commandAllocator; 48 unsigned int index; 49 }; 50 51 ComPtr<ID3D12CommandAllocator> mCommandAllocators[kMaxCommandAllocators]; 52 std::bitset<kMaxCommandAllocators> mFreeAllocators; 53 SerialQueue<ExecutionSerial, IndexedCommandAllocator> mInFlightCommandAllocators; 54 }; 55 56 }} // namespace dawn_native::d3d12 57 58 #endif // DAWNNATIVE_D3D12_COMMANDALLOCATORMANAGER_H_ 59