NAME
clock_getcpuclockid —
get a clock measuring process CPU
time
SYNOPSIS
#include
<time.h>
int
clock_getcpuclockid(pid_t
pid, clockid_t
*clock_id);
DESCRIPTION
The
clock_getcpuclockid()
function allows the calling process to get a clockid_t
value that measures the time spent by CPUs running in user or kernel mode on
behalf of the process specified by pid. If
pid is zero, then a clock for the calling process will
be returned.
RETURN VALUES
If successful, clock_getcpuclockid() will
return zero. Otherwise an error number will be returned to indicate the
error.
ERRORS
clock_getcpuclockid() will fail if:
- [
EPERM] - pid is neither zero nor the PID of the calling process.
SEE ALSO
STANDARDS
The clock_getcpuclockid() function
conforms to IEEE Std 1003.1-2008
(“POSIX.1”).
HISTORY
The clock_getcpuclockid() function first
appeared in IEEE Std 1003.1d-1999 (“POSIX.1d”) and has been
available since OpenBSD 5.4.