huschi.net

POSIX_SPAWNATTR_GETSCHEDPOLPOSIXPProgrammer'POSIX_SPAWNATTR_GETSCHEDPOLICY(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
       posix_spawnattr_getschedpolicy,  posix_spawnattr_setschedpolicy  -  get
       and  set  the  spawn-schedpolicy attribute of a spawn attributes object
       (ADVANCED REALTIME)
SYNOPSIS
       #include <spawn.h>
       #include <sched.h>
       int posix_spawnattr_getschedpolicy(const posix_spawnattr_t *
              restrict attr, int *restrict schedpolicy);
       int posix_spawnattr_setschedpolicy(posix_spawnattr_t *attr,
              int schedpolicy);

DESCRIPTION
       The posix_spawnattr_getschedpolicy() function shall obtain the value of
       the  spawn-schedpolicy  attribute from the attributes object referenced
       by attr.
       The posix_spawnattr_setschedpolicy()  function  shall  set  the  spawn-
       schedpolicy attribute in an initialized attributes object referenced by
       attr.
       The spawn-schedpolicy attribute represents the scheduling policy to  be
       assigned   to   the   new  process  image  in  a  spawn  operation  (if
       POSIX_SPAWN_SETSCHEDULER is set  in  the  spawn-flags  attribute).  The
       default value of this attribute is unspecified.
RETURN VALUE
       Upon   successful  completion,  posix_spawnattr_getschedpolicy()  shall
       return zero and store the value of the spawn-schedpolicy  attribute  of
       attr  into  the  object referenced by the schedpolicy parameter; other-
       wise, an error number shall be returned to indicate the error.
       Upon  successful  completion,  posix_spawnattr_setschedpolicy()   shall
       return  zero;  otherwise, an error number shall be returned to indicate
       the error.
ERRORS
       These functions may fail if:
       EINVAL The value specified by attr is invalid.

       The posix_spawnattr_setschedpolicy() function may fail if:
       EINVAL The value of the attribute being set is not valid.

       The following sections are informative.
EXAMPLES
       None.
APPLICATION USAGE
       These functions are part of the Spawn and  Process  Scheduling  options
       and need not be provided on all implementations.
RATIONALE
       None.
FUTURE DIRECTIONS
       None.
SEE ALSO
       posix_spawn(),    posix_spawnattr_destroy(),    posix_spawnattr_init(),
       posix_spawnattr_getsigdefault(),            posix_spawnattr_getflags(),
       posix_spawnattr_getpgroup(),           posix_spawnattr_getschedparam(),
       posix_spawnattr_getsigmask(),          posix_spawnattr_setsigdefault(),
       posix_spawnattr_setflags(),   posix_spawnattr_setpgroup(),  posix_spaw-
       nattr_setschedparam(),  posix_spawnattr_setsigmask(),   posix_spawnp(),
       the   Base   Definitions  volume  of  IEEE Std 1003.1-2001,  <sched.h>,
       <spawn.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   POSIX_SPAWNATTR_GETSCHEDPOLICY(3P)