NAME

       pthread_attr_getscope,  pthread_attr_setscope  - get and set the contentionscope attribute
       (REALTIME THREADS)

SYNOPSIS

       #include <pthread.h>

       int pthread_attr_getscope(const pthread_attr_t *restrict attr,
              int *restrict contentionscope);
       int pthread_attr_setscope(pthread_attr_t *attr, int contentionscope);

DESCRIPTION

       The pthread_attr_getscope() and pthread_attr_setscope() functions, respectively, shall get
       and set the contentionscope attribute in the attr object.

       The  contentionscope attribute may have the values PTHREAD_SCOPE_SYSTEM, signifying system
       scheduling contention  scope,  or  PTHREAD_SCOPE_PROCESS,  signifying  process  scheduling
       contention  scope.  The symbols PTHREAD_SCOPE_SYSTEM and PTHREAD_SCOPE_PROCESS are defined
       in the <pthread.h> header.

RETURN VALUE

       If successful, the pthread_attr_getscope()  and  pthread_attr_setscope()  functions  shall
       return zero; otherwise, an error number shall be returned to indicate the error.

ERRORS

       The pthread_attr_setscope() function may fail if:

       EINVAL The value of contentionscope is not valid.

       ENOTSUP
              An attempt was made to set the attribute to an unsupported value.

       These functions shall not return an error code of [EINTR].

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       After  these  attributes  have  been  set,  a  thread  can  be  created with the specified
       attributes using pthread_create(). Using  these  routines  does  not  affect  the  current
       running thread.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       pthread_attr_destroy()  , pthread_attr_getinheritsched() , pthread_attr_getschedpolicy() ,
       pthread_attr_getschedparam()  ,  pthread_create()  ,  the  Base  Definitions   volume   of
       IEEE Std 1003.1-2001, <pthread.h>, <sched.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 .