module documentation

PID file.

Interface IPIDFile Manages a file that remembers a process ID.
Class NonePIDFile PID file implementation that does nothing.
Class PIDFile Concrete implementation of IPIDFile.
Exception AlreadyRunningError Process is already running.
Exception InvalidPIDFileError PID file contents are invalid.
Exception NoPIDFound No PID found in PID file.
Exception StalePIDFileError PID file contents are valid, but there is no process with the referenced PID.
Variable nonePIDFile Undocumented
nonePIDFile: IPIDFile = (source)