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# IOAddressSegment

A structure that describes the location and size of a block of memory.

```
struct IOAddressSegment;
```

## Topics

### Getting the Address Information

[`uint64_t address;`](/documentation/DriverKit/IOAddressSegment/address)

The address of the buffer in the current process’ virtual memory space.

[`uint64_t length;`](/documentation/DriverKit/IOAddressSegment/length)

The size of the memory buffer, in bytes.


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