Time::HiRes module: High resolution time, sleep, and alarm.

Implement usleep, ualarm, and gettimeofday for Perl, as well as wrappers
to implement time, sleep, and alarm that know about non-integral seconds.

If your underlying operating system doesn't implement ualarm() the 
corresponding Perl function will not be available. If the OS is missing usleep,
a fake one using select() will be made. If the OS is missing gettimeofday,
you will get unresolved externals, wither at link- or run-time.

This is an improvement; the package used to not even build if you were
missing any of these bits. Roderick Schertler <roderick@argon.org> did all 
the conditional compilation stuff, look at HiRes.pm and the test suites; 
it's good educational reading.

POD documentation is embedded.

Copyright (c) 1996 Douglas E. Wegscheid.
All rights reserved. This program is free software; you can 
redistribute it and/or modify it under the same terms as Perl itself.