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PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
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CLOCK_GETCPUCLOCKID(3P) POSIX Programmer's ManualCLOCK_GETCPUCLOCKID(3P)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
clock_getcpuclockid — access a process CPU-time clock (ADVANCED
REALTIME)
#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(3p), timer_create(3p)
The Base Definitions volume of POSIX.1‐2017, time.h(0p)
Portions of this text are reprinted and reproduced in electronic
form from IEEE Std 1003.1-2017, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The
Open Group Base Specifications Issue 7, 2018 Edition, Copyright
(C) 2018 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 .
Any typographical or formatting errors that appear in this page
are most likely to have been introduced during the conversion of
the source files to man page format. To report such errors, see
https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2017 CLOCK_GETCPUCLOCKID(3P)
Pages that refer to this page: time.h(0p), clock_getres(3p), pthread_getcpuclockid(3p)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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