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// Copyright 2017 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 DAWNNATIVE_D3D12_COMMANDALLOCATORMANAGER_H_
#define DAWNNATIVE_D3D12_COMMANDALLOCATORMANAGER_H_
#include "dawn/native/d3d12/d3d12_platform.h"
#include "dawn/common/SerialQueue.h"
#include "dawn/native/Error.h"
#include "dawn/native/IntegerTypes.h"
#include <bitset>
namespace dawn::native::d3d12 {
class Device;
class CommandAllocatorManager {
public:
CommandAllocatorManager(Device* device);
// A CommandAllocator that is reserved must be used on the next ExecuteCommandLists
// otherwise its commands may be reset before execution has completed on the GPU
ResultOrError<ID3D12CommandAllocator*> ReserveCommandAllocator();
MaybeError Tick(ExecutionSerial lastCompletedSerial);
private:
Device* device;
// This must be at least 2 because the Device and Queue use separate command allocators
static constexpr unsigned int kMaxCommandAllocators = 32;
unsigned int mAllocatorCount;
struct IndexedCommandAllocator {
ComPtr<ID3D12CommandAllocator> commandAllocator;
unsigned int index;
};
ComPtr<ID3D12CommandAllocator> mCommandAllocators[kMaxCommandAllocators];
std::bitset<kMaxCommandAllocators> mFreeAllocators;
SerialQueue<ExecutionSerial, IndexedCommandAllocator> mInFlightCommandAllocators;
};
} // namespace dawn::native::d3d12
#endif // DAWNNATIVE_D3D12_COMMANDALLOCATORMANAGER_H_