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Linux 2.6 - man page for pthread_attr_getinheritsched (linux section 3posix)

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

NAME
       pthread_attr_getinheritsched,  pthread_attr_setinheritsched - get and set the inheritsched
       attribute (REALTIME THREADS)

SYNOPSIS
       #include <pthread.h>

       int pthread_attr_getinheritsched(const pthread_attr_t *restrict attr,
	      int *restrict inheritsched);
       int pthread_attr_setinheritsched(pthread_attr_t *attr,
	      int inheritsched);

DESCRIPTION
       The pthread_attr_getinheritsched(), and pthread_attr_setinheritsched() functions,  respec-
       tively, shall get and set the inheritsched attribute in the attr argument.

       When  the  attributes  objects  are  used  by pthread_create(), the inheritsched attribute
       determines how the other scheduling attributes of the created thread shall be set.

       PTHREAD_INHERIT_SCHED

	      Specifies that the thread scheduling attributes shall be inherited from the  creat-
	      ing thread, and the scheduling attributes in this attr argument shall be ignored.

       PTHREAD_EXPLICIT_SCHED

	      Specifies  that  the thread scheduling attributes shall be set to the corresponding
	      values from this attributes object.

       The  symbols  PTHREAD_INHERIT_SCHED  and  PTHREAD_EXPLICIT_SCHED  are   defined	 in   the
       <pthread.h> header.

       The following thread scheduling attributes defined by IEEE Std 1003.1-2001 are affected by
       the inheritsched attribute: scheduling policy  (  schedpolicy),	scheduling  parameters	(
       schedparam), and scheduling contention scope ( contentionscope).

RETURN VALUE
       If successful, the pthread_attr_getinheritsched() and pthread_attr_setinheritsched() func-
       tions shall return zero; otherwise, an error number shall  be  returned	to  indicate  the
       error.

ERRORS
       The pthread_attr_setinheritsched() function may fail if:

       EINVAL The value of inheritsched 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  run-
       ning thread.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       pthread_attr_destroy()	,   pthread_attr_getscope()   ,  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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003		  PTHREAD_ATTR_GETINHERITSCHED(P)


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