<!--
{
  "availability" : [
    "iOS: -",
    "iPadOS: -",
    "macCatalyst: -",
    "macOS: -",
    "tvOS: -",
    "visionOS: -",
    "watchOS: -"
  ],
  "documentType" : "symbol",
  "framework" : "CoreFoundation",
  "identifier" : "/documentation/CoreFoundation/CFStreamStatus",
  "metadataVersion" : "0.1.0",
  "role" : "Enumeration",
  "symbol" : {
    "kind" : "Enumeration",
    "modules" : [
      "Core Foundation"
    ],
    "preciseIdentifier" : "c:@E@CFStreamStatus"
  },
  "title" : "CFStreamStatus"
}
-->

# CFStreamStatus

Constants that describe the status of a stream.

```
enum CFStreamStatus
```

## Overview

The `CFStreamStatus` enumeration defines constants that describe the status of a stream. These values are returned by [`CFReadStreamGetStatus(_:)`](/documentation/CoreFoundation/CFReadStreamGetStatus(_:)) and [`CFWriteStreamGetStatus(_:)`](/documentation/CoreFoundation/CFWriteStreamGetStatus(_:)).

## Topics

### Constants

[`CFStreamStatus.notOpen`](/documentation/CoreFoundation/CFStreamStatus/notOpen)

The stream is not open for reading or writing.

[`CFStreamStatus.opening`](/documentation/CoreFoundation/CFStreamStatus/opening)

The stream is being opened for reading or for writing.

[`CFStreamStatus.open`](/documentation/CoreFoundation/CFStreamStatus/open)

The stream is open.

[`CFStreamStatus.reading`](/documentation/CoreFoundation/CFStreamStatus/reading)

The stream is being read from.

[`CFStreamStatus.writing`](/documentation/CoreFoundation/CFStreamStatus/writing)

The stream is being written to.

[`CFStreamStatus.atEnd`](/documentation/CoreFoundation/CFStreamStatus/atEnd)

There is no more data to read, or no more data can be written.

[`CFStreamStatus.closed`](/documentation/CoreFoundation/CFStreamStatus/closed)

The stream is closed.

[`CFStreamStatus.error`](/documentation/CoreFoundation/CFStreamStatus/error)

An error occurred on the stream.


---

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)