CLOCK_GETCPUCLOCKID(3)                        FreeBSD Library Functions Manual

NAME
     clock_getcpuclockid - access a process CPU-time clock

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <time.h>

     int
     clock_getcpuclockid(pid_t pid, clockid_t *clock_id);

DESCRIPTION
     The clock_getcpuclockid() returns the clock ID of the CPU-time clock of
     the process specified by pid.  If the process described by pid exists and
     the calling process has permission, the clock ID of this clock will be
     returned in clock_id.

     If pid is zero, the clock_getcpuclockid() function returns the clock ID
     of the CPU-time clock of the process making the call, in clock_id.

RETURN VALUES
     Upon successful completion, clock_getcpuclockid() returns zero;
     otherwise, an error number is returned to indicate the error.

ERRORS
     The clock_getcpuclockid() function will fail if:

     [EPERM]            The requesting process does not have permission to
                        access the CPU-time clock for the process.

     [ESRCH]            No process can be found corresponding to the process
                        specified by pid.

SEE ALSO
     clock_gettime(2)

STANDARDS
     The clock_getcpuclockid() function conforms to IEEE Std 1003.1-2001
     ("POSIX.1").

HISTORY
     The clock_getcpuclockid() function first appeared in FreeBSD 10.0.

AUTHORS
     David Xu <davidxu@FreeBSD.org>

FreeBSD 13.1-RELEASE-p6         August 21, 2012        FreeBSD 13.1-RELEASE-p6