---
title: "CTFontManagerCreateFontRequestRunLoopSource(_:_:)"
framework: coretext
role: symbol
role_heading: Function
path: "coretext/ctfontmanagercreatefontrequestrunloopsource(_:_:)"
---

# CTFontManagerCreateFontRequestRunLoopSource(_:_:)

Creates a reference to a run loop source used to convey font requests from the Font Manager.

## Declaration

```swift
func CTFontManagerCreateFontRequestRunLoopSource(_ sourceOrder: CFIndex, _ createMatchesCallback: @escaping (CFDictionary, pid_t) -> Unmanaged<CFArray>) -> CFRunLoopSource?
```

## Parameters

- `sourceOrder`: The order of the created run loop source.
- `createMatchesCallback`: A block to handle the font request.

## Return Value

Return Value A reference to a CFRunLoopSource object that should be added to the run loop. To stop receiving requests, invalidate this run loop source. Returns NULL on error, in the case of a duplicate requestPortName, or invalid context structure.

## See Also

### Functions

- [CTFontDescriptorMatchFontDescriptorsWithProgressHandler(_:_:_:)](coretext/ctfontdescriptormatchfontdescriptorswithprogresshandler(_:_:_:).md)
- [CTFontManagerCompareFontFamilyNames(_:_:_:)](coretext/ctfontmanagercomparefontfamilynames(_:_:_:).md)
- [CTFontManagerCopyAvailableFontFamilyNames()](coretext/ctfontmanagercopyavailablefontfamilynames().md)
- [CTFontManagerCopyAvailableFontURLs()](coretext/ctfontmanagercopyavailablefonturls().md)
- [CTFontManagerCopyAvailablePostScriptNames()](coretext/ctfontmanagercopyavailablepostscriptnames().md)
- [CTFontManagerCreateFontDescriptorFromData(_:)](coretext/ctfontmanagercreatefontdescriptorfromdata(_:).md)
- [CTFontManagerCreateFontDescriptorsFromURL(_:)](coretext/ctfontmanagercreatefontdescriptorsfromurl(_:).md)
- [CTFontManagerEnableFontDescriptors(_:_:)](coretext/ctfontmanagerenablefontdescriptors(_:_:).md)
- [CTFontManagerGetAutoActivationSetting(_:)](coretext/ctfontmanagergetautoactivationsetting(_:).md)
- [CTFontManagerGetScopeForURL(_:)](coretext/ctfontmanagergetscopeforurl(_:).md)
- [CTFontManagerIsSupportedFont(_:)](coretext/ctfontmanagerissupportedfont(_:).md)
- [CTFontManagerRegisterFontsForURL(_:_:_:)](coretext/ctfontmanagerregisterfontsforurl(_:_:_:).md)
- [CTFontManagerRegisterFontsForURLs(_:_:_:)](coretext/ctfontmanagerregisterfontsforurls(_:_:_:).md)
- [CTFontManagerRegisterGraphicsFont(_:_:)](coretext/ctfontmanagerregistergraphicsfont(_:_:).md)
- [CTFontManagerSetAutoActivationSetting(_:_:)](coretext/ctfontmanagersetautoactivationsetting(_:_:).md)