pthreads.c - summary of thread execution times

Hi,
How would one go about getting the summary of execution time taken by a process and its children in C? If I have, say, a process which forks, and in turn creates some threads, is there an already-existent way to get the summary of the time taken by each?
Thanks.

Assuming you want summarized values:

      #include <sys/times.h>

      clock_t times(struct tms *buffer);

           struct tms {
               clock_t     tms_utime;      /* user time */
               clock_t     tms_stime;      /* system time */"
               clock_t     tms_cutime;     /* user time, children */
               clock_t     tms_cstime;     /* system time, children */
           };

clock_t is 1/CLK_TCK seconds; CLK_TCK is defined as the return value of
sysconf( _SC_CLK_TCK );