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# NSZone

A type used to identify and manage memory zones.

```
typedef struct _NSZone NSZone;
```

## Topics

### Managing Zones

Zones are ignored on iOS and 64-bit runtime in macOS. You should not use zones in current development.

[`NSCreateZone`](/documentation/Foundation/NSCreateZone)

Creates a new zone.

[`NSRecycleZone`](/documentation/Foundation/NSRecycleZone)

Frees memory in a zone.

[`NSSetZoneName`](/documentation/Foundation/NSSetZoneName)

Sets the name of the specified zone.

[`NSZoneCalloc`](/documentation/Foundation/NSZoneCalloc)

Allocates memory in a zone.

[`NSZoneFree`](/documentation/Foundation/NSZoneFree)

Deallocates a block of memory in the specified zone.

[`NSZoneFromPointer`](/documentation/Foundation/NSZoneFromPointer)

Gets the zone for a given block of memory.

[`NSZoneMalloc`](/documentation/Foundation/NSZoneMalloc)

Allocates memory in a zone.

[`NSZoneName`](/documentation/Foundation/NSZoneName)

Returns the name of the specified zone.

[`NSZoneRealloc`](/documentation/Foundation/NSZoneRealloc)

Allocates memory in a zone.

[`NSDefaultMallocZone`](/documentation/Foundation/NSDefaultMallocZone)

Returns the default zone.


---

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