Resource usage information
==========================
An interface to provide resource usage information on the current
process. This module was written by Jeremy Hylton
<jhylton@cnri.reston.va.us>.
This manual section was written by Jeremy Hylton
<jhylton@cnri.reston.va.us>.
This module provides basic mechanisms for measuring and controlling
system resources utilized by a program.
Symbolic constants are used to specify particular system resources and
to request usage information about either the current process or its
children.
A single exception is defined for errors:
`error'
The functions described below may raise this error if the
underlying system call failures unexpectedly.