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# DriverKit Constants

## Topics

### Constants

[`constexpr const auto OSAdoptMemory;`](/documentation/DriverKit/OSAdoptMemory)

[`constexpr const auto OSAllocateMemory;`](/documentation/DriverKit/OSAllocateMemory)

[`constexpr const auto OSAllocateMemoryZero;`](/documentation/DriverKit/OSAllocateMemoryZero)

[`constexpr static const auto OSNoRetain;`](/documentation/DriverKit/OSNoRetain)

[`constexpr static const auto OSRetain;`](/documentation/DriverKit/OSRetain)


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