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// Copyright 2018 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 SRC_DAWN_NATIVE_DYNAMICUPLOADER_H_
#define SRC_DAWN_NATIVE_DYNAMICUPLOADER_H_
#include <memory>
#include <vector>
#include "dawn/common/Ref.h"
#include "dawn/native/Error.h"
#include "dawn/native/Forward.h"
#include "dawn/native/IntegerTypes.h"
#include "dawn/native/RingBufferAllocator.h"
// DynamicUploader is the front-end implementation used to manage multiple ring buffers for upload
// usage.
namespace dawn::native {
class BufferBase;
struct UploadHandle {
uint8_t* mappedBuffer = nullptr;
uint64_t startOffset = 0;
BufferBase* stagingBuffer = nullptr;
};
class DynamicUploader {
public:
explicit DynamicUploader(DeviceBase* device);
~DynamicUploader() = default;
// We add functions to Release StagingBuffers to the DynamicUploader as there's
// currently no place to track the allocated staging buffers such that they're freed after
// pending commands are finished. This should be changed when better resource allocation is
// implemented.
void ReleaseStagingBuffer(Ref<BufferBase> stagingBuffer);
ResultOrError<UploadHandle> Allocate(uint64_t allocationSize,
ExecutionSerial serial,
uint64_t offsetAlignment);
void Deallocate(ExecutionSerial lastCompletedSerial);
bool ShouldFlush();
private:
static constexpr uint64_t kRingBufferSize = 4 * 1024 * 1024;
uint64_t GetTotalAllocatedSize();
struct RingBuffer {
Ref<BufferBase> mStagingBuffer;
RingBufferAllocator mAllocator;
};
ResultOrError<UploadHandle> AllocateInternal(uint64_t allocationSize,
ExecutionSerial serial,
uint64_t offsetAlignment);
std::vector<std::unique_ptr<RingBuffer>> mRingBuffers;
SerialQueue<ExecutionSerial, Ref<BufferBase>> mReleasedStagingBuffers;
DeviceBase* mDevice;
};
} // namespace dawn::native
#endif // SRC_DAWN_NATIVE_DYNAMICUPLOADER_H_