Originální popis anglicky:
clock_getcpuclockid - access a process CPU-time clock (
ADVANCED
REALTIME)
Návod, kniha: POSIX Programmer's Manual
#include <time.h>
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 process.
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.
None.
The
clock_getcpuclockid() function is part of the Process CPU-Time Clocks
option and need not be provided on all implementations.
None.
None.
clock_getres() ,
timer_create() , the Base Definitions volume of
IEEE Std 1003.1-2001,
<time.h>
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 original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
