system_clock(3I)

NAME
     SYSTEM_CLOCK - Returns integer data from a real-time clock

SYNOPSIS
     CALL SYSTEM_CLOCK ([[COUNT=]count] [,[COUNT_RATE=]count_rate]
     [,[COUNT_MAX=count_max])

STANDARDS
     Fortran

DESCRIPTION
     The SYSTEM_CLOCK intrinsic subroutine returns information gathered
     from the real-time clock.  SYSTEM_CLOCK accepts the following
     arguments:

     count     Must be type default integer.  If count is present, it is
               set to a machine-specific value based on the current value
               of the machine's clock.  If there is no clock, it is set to
               -HUGE(0).  The machine-specific value is incremented by one
               for each clock count until the value count_max is reached;
               it is reset to 0 at the next count.  If there is a clock, it
               lies in the range 0 to count_max.

     count_rate
               Must be type default integer.  If count_rate is present, it
               is set to the number of clock counts per second.  If there
               is no clock, it is set to 0.

     count_max Must be type default integer.  If count_max is present, it
               is set to the maximum value that count can have.  If there
               is no clock, it is set to 0.

     The arguments to SYSTEM_CLOCK cannot be declared with a nondefault
     kind type.

     The name of this intrinsic cannot be passed as an argument.

     Hardware counter values from the syssgi(2) system call are used on
     IRIX systems.

SEE ALSO
     SYSCLOCK(3F)

     gettimeofday(2)