---
title: "DNSServiceRefDeallocate(_:)"
framework: dnssd
role: symbol
role_heading: Function
path: "dnssd/dnsservicerefdeallocate(_:)"
---

# DNSServiceRefDeallocate(_:)

Terminates a connection with the daemon and frees memory associated with the DNSServiceRef.

## Declaration

```swift
func DNSServiceRefDeallocate(_ sdRef: DNSServiceRef!)
```

## Parameters

- `sdRef`: A DNSServiceRef initialized by any of the DNSService calls.

## Discussion

Discussion Any services or records registered with this DNSServiceRef will be deregistered. Any Browse, Resolve, or Query operations called with this reference will be terminated. Note: If the reference’s underlying socket is used in a run loop or select() call, it should be removed BEFORE DNSServiceRefDeallocate(_:) is called, as this function closes the reference’s socket. Note: If the reference was initialized with DNSServiceCreateConnection(_:), any DNSRecordRefs created via this reference will be invalidated by this call - the resource records are deregistered, and their DNSRecordRefs may not be used in subsequent functions. Similarly, if the reference was initialized with DNSServiceRegister(_:_:_:_:_:_:_:_:_:_:_:_:), and an extra resource record was added to the service via DNSServiceAddRecord(_:_:_:_:_:_:_:), the DNSRecordRef created by the add call is invalidated when this function is called - the DNSRecordRef may not be used in subsequent functions. Note: This call is to be used only with the DNSServiceRef defined by this API.

## See Also

### Unix Domain Socket access, DNSServiceRef deallocation, and data processing functions

- [DNSServiceProcessResult(_:)](dnssd/dnsserviceprocessresult(_:).md)
- [DNSServiceRefSockFD(_:)](dnssd/dnsservicerefsockfd(_:).md)