Function

CFMachPortIsValid

Returns a Boolean value that indicates whether a CFMachPort object is valid and able to receive messages.

Declaration

Boolean CFMachPortIsValid(CFMachPortRef port);

Parameters

port

The CFMachPort object to examine.

Return Value

true if port can be used for communication, otherwise false.

See Also

Examining a CFMachPort Object

CFMachPortGetContext

Returns the context information for a CFMachPort object.

CFMachPortGetInvalidationCallBack

Returns the invalidation callback function for a CFMachPort object.

CFMachPortGetPort

Returns the native Mach port represented by a CFMachPort object.