/* * NAME: * usleep -- This is the precision timer for Test Set * Automation. It uses the select(2) system * call to delay for the desired number of * micro-seconds. This call returns ZERO * (which is usually ignored) on successful * completion, -1 otherwise. * * ALGORITHM: * 1) We range check the passed in microseconds and log a * warning message if appropriate. We then return without * delay, flagging an error. * 2) Load the Seconds and micro-seconds portion of the * interval timer structure. * 3) Call select(2) with no file descriptors set, just the * timer, this results in either delaying the proper * ammount of time or being interupted early by a signal. * * HISTORY: * Added when the need for a subsecond timer was evident. * * AUTHOR: * Michael J. Dyer Telephone: AT&T 414.647.4044 * General Electric Medical Systems GE DialComm 8 *767.4044 * P.O. Box 414 Mail Stop 12-27 Sect'y AT&T 414.647.4584 * Milwaukee, Wisconsin USA 53201 8 *767.4584 * internet: mike@sherlock.med.ge.com GEMS WIZARD e-mail: DYER */ int usleep(unsigned long int microSeconds);