clock man page on DigitalUNIX

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clock(3)							      clock(3)

       clock - Report CPU time used

       #include <time.h>

       clock_t clock(
	       void );

       Standard C Library (libc)

       Interfaces  documented on this reference page conform to industry stan‐
       dards as follows:

       clock():	 XPG4, XPG4-UNIX

       Refer to the standards(5) reference page	 for  more  information	 about
       industry standards and associated tags.

       The  clock()  function reports the amount of processor time used by the
       calling process and each of its terminated child processes for which  a
       wait function has been executed. When a child process does not wait for
       its children, its child-process times are not included in its times.

       The clock() function returns the amount of processor time (in microsec‐
       onds)  used  since  the	first call to clock().	To convert the time to
       seconds, divide it by CLOCKS_PER_SEC (which is defined to be  1,000,000
       in  <time.h>). If the processor time used is not available or its value
       cannot be represented, the clock() function returns (clock_t)-1.

       Functions: ctime(3), getrusage(2), times(3), wait(2)

       Standards: standards(5)


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