CLOCK(3C)            INTERACTIVE UNIX System            CLOCK(3C)



          NAME
               clock - report CPU time used

          SYNOPSIS
               long clock ( )

          DESCRIPTION
               The clock function 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 cal-
               ling 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.

          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).































          Rev. C Software Development Set                            Page 1