PTHREAD_ATTR_GETSCOPE(P)   POSIX Programmer's Manual  PTHREAD_ATTR_GETSCOPE(P)



NAME
       pthread_attr_getscope,  pthread_attr_setscope  -  get  and set the con-
       tentionscope 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_PRO-
       CESS, 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 .



IEEE/The Open Group                  2003             PTHREAD_ATTR_GETSCOPE(P)