CLOCK(3C)                                               CLOCK(3C)



     NAME
          clock - report CPU time used

     SYNOPSIS
          long clock ( )

     DESCRIPTION
          clock returns the amount of CPU time (in microseconds) used
          since the first call to clock.  The time reported is the sum
          of the user and system times of the calling process and its
          terminated child processes for which it has executed
          wait(2), pclose(3S), or system(3S).

          The resolution of the clock is 10 milliseconds on IRIS
          workstations.

     SEE ALSO
          times(2), wait(2), popen(3S), system(3S).

     BUGS
          The value returned by clock is defined in microseconds for
          compatibility with systems that have CPU clocks with much
          higher resolution.  Because of this, the value returned will
          wrap around after accumulating only 2147 seconds of CPU time
          (about 36 minutes).

     ORIGIN
          AT&T V.3



























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