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

clock_gettime(2), pthread_getcpuclockid(3)

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.