CFMachPortCallBack

Declaration

typealias CFMachPortCallBack = (CFMachPort?, UnsafeMutableRawPointer?, CFIndex, UnsafeMutableRawPointer?) -> Void

Parameters

• port:

  The CFMachPort object on which the message msg was received.

• msg:

  The Mach message received on port. The pointer is to a mach_msg_header_t structure.

• size:

  Size of the Mach message msg, excluding the message trailer.

• info:

  The info member of the Cfmachportcontext structure used when creating port.

Discussion

You specify this callback when creating a CFMachPort object with either CFMachPortCreate(_:_:_:_:) or CFMachPortCreateWithPort(_:_:_:_:_:). To receive messages on a CFMachPort object (and have this callback invoked), you must create a run loop source for the port and add it to a run loop.

See Also

Callbacks

• CFMachPortInvalidationCallBack