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PTHREAD_ATTR_GETSCOPE(3P)  POSIX Programmer's Manual PTHREAD_ATTR_GETSCOPE(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
       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_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 .

IEEE/The Open Group		     2003	     PTHREAD_ATTR_GETSCOPE(3P)
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