| // 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. |
| |
| #include "dawn_native/d3d12/CommandAllocatorManager.h" |
| |
| #include "dawn_native/d3d12/D3D12Error.h" |
| #include "dawn_native/d3d12/DeviceD3D12.h" |
| |
| #include "common/Assert.h" |
| #include "common/BitSetIterator.h" |
| |
| namespace dawn::native::d3d12 { |
| |
| CommandAllocatorManager::CommandAllocatorManager(Device* device) |
| : device(device), mAllocatorCount(0) { |
| mFreeAllocators.set(); |
| } |
| |
| ResultOrError<ID3D12CommandAllocator*> CommandAllocatorManager::ReserveCommandAllocator() { |
| // If there are no free allocators, get the oldest serial in flight and wait on it |
| if (mFreeAllocators.none()) { |
| const ExecutionSerial firstSerial = mInFlightCommandAllocators.FirstSerial(); |
| DAWN_TRY(device->WaitForSerial(firstSerial)); |
| DAWN_TRY(Tick(firstSerial)); |
| } |
| |
| ASSERT(mFreeAllocators.any()); |
| |
| // Get the index of the first free allocator from the bitset |
| unsigned int firstFreeIndex = *(IterateBitSet(mFreeAllocators).begin()); |
| |
| if (firstFreeIndex >= mAllocatorCount) { |
| ASSERT(firstFreeIndex == mAllocatorCount); |
| mAllocatorCount++; |
| DAWN_TRY(CheckHRESULT(device->GetD3D12Device()->CreateCommandAllocator( |
| D3D12_COMMAND_LIST_TYPE_DIRECT, |
| IID_PPV_ARGS(&mCommandAllocators[firstFreeIndex])), |
| "D3D12 create command allocator")); |
| } |
| |
| // Mark the command allocator as used |
| mFreeAllocators.reset(firstFreeIndex); |
| |
| // Enqueue the command allocator. It will be scheduled for reset after the next |
| // ExecuteCommandLists |
| mInFlightCommandAllocators.Enqueue({mCommandAllocators[firstFreeIndex], firstFreeIndex}, |
| device->GetPendingCommandSerial()); |
| return mCommandAllocators[firstFreeIndex].Get(); |
| } |
| |
| MaybeError CommandAllocatorManager::Tick(ExecutionSerial lastCompletedSerial) { |
| // Reset all command allocators that are no longer in flight |
| for (auto it : mInFlightCommandAllocators.IterateUpTo(lastCompletedSerial)) { |
| DAWN_TRY(CheckHRESULT(it.commandAllocator->Reset(), "D3D12 reset command allocator")); |
| mFreeAllocators.set(it.index); |
| } |
| mInFlightCommandAllocators.ClearUpTo(lastCompletedSerial); |
| return {}; |
| } |
| |
| } // namespace dawn::native::d3d12 |