huschi.net

CLOCK_GETCPUCLOCKID(3P)    POSIX Programmer's Manual   CLOCK_GETCPUCLOCKID(3P)

PROLOG
       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.
NAME
       clock_getcpuclockid - access a process CPU-time clock  (ADVANCED  REAL-
       TIME)
SYNOPSIS
       #include <time.h>
       int clock_getcpuclockid(pid_t pid, clockid_t *clock_id);

DESCRIPTION
       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.
RETURN VALUE
       Upon  successful  completion,  clock_getcpuclockid() shall return zero;
       otherwise, an error number shall be returned to indicate the error.
ERRORS
       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.
EXAMPLES
       None.
APPLICATION USAGE
       The clock_getcpuclockid() function is  part  of  the  Process  CPU-Time
       Clocks option and need not be provided on all implementations.
RATIONALE
       None.
FUTURE DIRECTIONS
       None.
SEE ALSO
       clock_getres(),   timer_create(),   the   Base  Definitions  volume  of
       IEEE Std 1003.1-2001, <time.h>
COPYRIGHT
       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 .

IEEE/The Open Group                  2003              CLOCK_GETCPUCLOCKID(3P)