Linux 2.6 - man page for clock_getcpuclockid (linux section 3posix)
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CLOCK_GETCPUCLOCKID(P) POSIX Programmer's Manual CLOCK_GETCPUCLOCKID(P)
clock_getcpuclockid - access a process CPU-time clock (ADVANCED REALTIME)
int clock_getcpuclockid(pid_t pid, clockid_t *clock_id);
The clock_getcpuclockid() function shall return 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 shall be returned in clock_id.
If pid is zero, the clock_getcpuclockid() function shall return the clock ID of the CPU-
time clock of the process making the call, in clock_id.
The conditions under which one process has permission to obtain the CPU-time clock ID of
other processes are implementation-defined.
Upon successful completion, clock_getcpuclockid() shall return zero; otherwise, an error
number shall be returned to indicate the error.
The clock_getcpuclockid() function shall fail if:
EPERM The requesting process does not have permission to access the CPU-time clock for
The clock_getcpuclockid() function may fail if:
ESRCH No process can be found corresponding to the process specified by pid.
The following sections are informative.
The clock_getcpuclockid() function is part of the Process CPU-Time Clocks option and need
not be provided on all implementations.
clock_getres() , timer_create() , the Base Definitions volume of IEEE Std 1003.1-2001,
Portions of this text are reprinted and reproduced in electronic form from IEEE Std
1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System
Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by
the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and The Open Group
Standard, the original IEEE and The Open Group Standard is the referee document. The orig-
inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 CLOCK_GETCPUCLOCKID(P)
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