CFHostGetReachability(_:_:)

Declaration

func CFHostGetReachability(_ theHost: CFHost, _ hasBeenResolved: UnsafeMutablePointer<DarwinBoolean>?) -> Unmanaged<CFData>?

Parameters

• theHost:

  The host whose reachability is to be obtained. The host must have been previously resolved. (To resolve a host, call Cfhoststartinforesolution(_:_:_:).) This value must not be NULL.

• hasBeenResolved:

  On return, contains TRUE if the reachability was available, otherwise FALSE. This value may be NULL.

Return Value

A CFData object that wraps the reachability flags (SCNetworkConnectionFlags) defined in SystemConfiguration/SCNetwork.h, or NULL if reachability information was not available.

Discussion

This function gets reachability information in a thread-safe way, but the resulting data is not thread-safe. The data is returned as a “get” as opposed to a copy, so the data is not safe if the CFHost is altered from another thread.

See Also

Hosts

• CFHost
• CFHostInfoType
• CFHostClientContext
• CFHostCancelInfoResolution(_:_:)
• CFHostCreateCopy(_:_:)
• CFHostCreateWithAddress(_:_:)
• CFHostCreateWithName(_:_:)
• CFHostGetAddressing(_:_:)
• CFHostGetNames(_:_:)
• CFHostGetTypeID()
• CFHostScheduleWithRunLoop(_:_:_:)
• CFHostSetClient(_:_:_:)
• CFHostStartInfoResolution(_:_:_:)
• CFHostUnscheduleFromRunLoop(_:_:_:)