# 2.11BSD#431 - /usr/src/lib/libc/gen/usleep.c

##### Functions

    usleep            X

       1: /*
       2:  * Program: sleep.c
       3:  * Copyright: 1997, sms
       4:  * Author: Steven M. Schultz
       5:  *
       6:  * Version   Date	Modification
       7:  *     1.0  1997/9/26	1. Initial release.
       8: */
       9:
      10: #include <stdio.h>  /* For NULL */
      11: #include <sys/types.h>
      12: #include <sys/time.h>
      13:
      14: /*
      15:  * This implements the usleep(3) function using only 1 system call (select)
      16:  * instead of the 9 that the old implementation required.  Also this version
      17:  * avoids using signals (with the attendant system overhead).
      18:  *
      19:  * Nothing is returned and if less than ~20000 microseconds is specified the
      20:  * select will return without any delay at all.
      21: */
      22:
      23: usleep(micros)
      24:     long micros;
      25:     {
      26:     struct timeval s;
      27:
      28:     if  (micros > 0)
      29:         {
      30:         s.tv_sec = micros / 1000000L;
      31:         s.tv_usec = micros % 1000000L;
      32:         select(0, NULL, NULL, NULL, &s);
      33:         }
      34:     }

#### Defined functions

usleep defined in line 23; used 5 times

- in /usr/include/unistd.h line 90
- in /usr/src/libexec/acctd/acctd.c line 135, 285
- in /usr/src/libexec/identd/src/parse.c line 510
- in /usr/src/new/kermit5.188/ckutio.c line 4916

Last modified: 1997-09-26 Generated: 2016-12-26 | Generated by src2html V0.67 page hit count: 736 |