src/dawn/native/vulkan/RefCountedVkHandle.h

// Copyright 2023 The Dawn & Tint Authors
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#ifndef SRC_DAWN_NATIVE_VULKAN_REFCOUNTEDVKHANDLE_H_
#define SRC_DAWN_NATIVE_VULKAN_REFCOUNTEDVKHANDLE_H_

#include "dawn/common/RefCounted.h"
#include "dawn/native/vulkan/DeviceVk.h"
#include "dawn/native/vulkan/FencedDeleter.h"

namespace dawn::native::vulkan {

// RefCountedVkHandle is used to wrap a Vulkan object that is shared between multiple systems.
// The object is kept alive until all refs are dropped; then it is sent to the fenced deleter
// for destruction.
template <typename Handle>
class RefCountedVkHandle : public RefCounted {
  public:
    RefCountedVkHandle(Device* device, Handle handle) : mDevice(device), mHandle(handle) {}

    ~RefCountedVkHandle() override {
        if (mHandle != VK_NULL_HANDLE) {
            mDevice->GetFencedDeleter()->DeleteWhenUnused(mHandle);
        }
    }

    Handle Get() const { return mHandle; }

  private:
    Ref<Device> mDevice;
    Handle mHandle = VK_NULL_HANDLE;
};

}  // namespace dawn::native::vulkan

#endif  // SRC_DAWN_NATIVE_VULKAN_REFCOUNTEDVKHANDLE_H_