Man Clock_getcpuclockid en anglais
CLOCK_GETCPUCLOCKID(P)     POSIX Programmer's Manual    CLOCK_GETCPUCLOCKID(P)



 

NAME


       clock_getcpuclockid  -  access a process CPU-time clock (ADVANCED REAL-
       TIME)

 

SYNOPSIS


       #include 

       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, 

 

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(P)