Inside Macintosh: Macintosh Toolbox Essentials /

Chapter 2 - Event Manager / Event Manager Reference

Event Manager Routines / Converting Process Serial Numbers and Port Names

GetPortNameFromProcessSerialNumber

Use GetPortNameFromProcessSerialNumber to get the port name of a process.

FUNCTION GetPortNameFromProcessSerialNumber
            (VAR portName: PPCPortRec;
             PSN: ProcessSerialNumber): OSErr;

portName

Returns the port name of the process designated by the PSN parameter. You can use the returned port name to send a high-level event to
that process.

PSN

The process serial number of the process whose port name you want.

DESCRIPTION

The GetPortNameFromProcessSerialNumber function returns the port name registered to a process having a specific process serial number.

SPECIAL CONSIDERATIONS

The GetPortNameFromProcessSerialNumber function does not move or purge memory but for other reasons should not be called from within an interrupt, such as
in a completion routine or VBL task.

ASSEMBLY-LANGUAGE INFORMATION

The trap macro and routine selector for the GetPortNameFromProcessSerialNumber function are

Trap macro	Selector
_OSDispatch	$0046

RESULT CODES

noErr	0	No error
procNotFound	-600	No eligible process with specified process serial number

SEE ALSO

For a description of the PPCPortRec data type, see the chapter "Program-to-Program Communications Toolbox" in Inside Macintosh: Interapplication Communication.