// Copyright 2019 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_VULKAN_RESOURCEMEMORYALLOCATORVK_H_
#define DAWNNATIVE_VULKAN_RESOURCEMEMORYALLOCATORVK_H_

#include "dawn/common/SerialQueue.h"
#include "dawn/common/vulkan_platform.h"
#include "dawn/native/Error.h"
#include "dawn/native/IntegerTypes.h"
#include "dawn/native/PooledResourceMemoryAllocator.h"
#include "dawn/native/ResourceMemoryAllocation.h"

#include <memory>
#include <vector>

namespace dawn::native::vulkan {

    class Device;

    // Various kinds of memory that influence the result of the allocation. For example, to take
    // into account mappability and Vulkan's bufferImageGranularity.
    enum class MemoryKind {
        Linear,
        LinearMappable,
        Opaque,
    };

    class ResourceMemoryAllocator {
      public:
        ResourceMemoryAllocator(Device* device);
        ~ResourceMemoryAllocator();

        ResultOrError<ResourceMemoryAllocation> Allocate(const VkMemoryRequirements& requirements,
                                                         MemoryKind kind);
        void Deallocate(ResourceMemoryAllocation* allocation);

        void DestroyPool();

        void Tick(ExecutionSerial completedSerial);

        int FindBestTypeIndex(VkMemoryRequirements requirements, MemoryKind kind);

      private:
        Device* mDevice;

        class SingleTypeAllocator;
        std::vector<std::unique_ptr<SingleTypeAllocator>> mAllocatorsPerType;

        SerialQueue<ExecutionSerial, ResourceMemoryAllocation> mSubAllocationsToDelete;
    };

}  // namespace dawn::native::vulkan

#endif  // DAWNNATIVE_VULKAN_RESOURCEMEMORYALLOCATORVK_H_