---
title: IODelete
framework: driverkit
role: symbol
role_heading: Macro
path: driverkit/iodelete
---

# IODelete

Frees the memory associated with a valid, typed array.

## Declaration

```occ
#define IODelete(ptr, type, count)
```

## Parameters

- `ptr`: The pointer to the memory block to free. This pointer must not be NULL.
- `type`: The data type stored in the memory block. The macro uses the type to determine its size.
- `count`: The number of array entries in the memory block

## Discussion

Discussion Use this macro to free memory that you allocated with IONew or IONewZero. It is a programmer error to pass a NULL pointer to this macro.

## See Also

### Deallocation

- [IOSafeDeleteNULL](driverkit/iosafedeletenull.md)
- [OSSafeReleaseNULL](driverkit/ossafereleasenull.md)
- [IOFree](driverkit/iofree.md)