<!--
{
  "availability" : [
    "iOS: 2.0.0 -",
    "iPadOS: 2.0.0 -",
    "macCatalyst: 13.1.0 -",
    "macOS: 10.3.0 -",
    "tvOS: 9.0.0 -",
    "visionOS: 1.0.0 -",
    "watchOS: 1.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "ObjectiveC",
  "identifier" : "/documentation/ObjectiveC/objc_sync_exit",
  "metadataVersion" : "0.1.0",
  "role" : "Function",
  "symbol" : {
    "kind" : "Function",
    "modules" : [
      "Objective-C Runtime"
    ],
    "preciseIdentifier" : "c:@F@objc_sync_exit"
  },
  "title" : "objc_sync_exit"
}
-->

# objc_sync_exit

End synchronizing on ‘obj’.

```
extern int objc_sync_exit(id obj);
```

## Parameters

`obj`

The object to end synchronizing on.

## Return Value

OBJC_SYNC_SUCCESS or OBJC_SYNC_NOT_OWNING_THREAD_ERROR

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)