pthread_attr_getinheritsched(3p) [suse man page]

PTHREAD_ATTR_GETINHERITSCHED(3P)			     POSIX Programmer's Manual				  PTHREAD_ATTR_GETINHERITSCHED(3P)

PROLOG

       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

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,  respectively,  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 creating 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() functions shall return zero; otherwise, an error  num-
       ber 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 running 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 Technol-
       ogy -- 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_GETINHERITSCHED(3P)

Check Out this Related Man Page

PTHREAD_ATTR_GETINHERITEDSCHED(3)			   BSD Library Functions Manual 			 PTHREAD_ATTR_GETINHERITEDSCHED(3)

NAME

     pthread_attr_getinheritedsched -- get and set ``inheritsched'' attribute

LIBRARY

     POSIX Threads Library (libpthread, -lpthread)

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 get and set, respectively, the inherit scheduler attribute,
     inheritsched, in the attr object.	The inheritsched parameter specifies whether a tread created by using attr will obtain its scheduling
     attributes directly from attr or whether it will inherit these from the calling thread.

     Two values are possible for inheritsched:

	   PTHREAD_INHERIT_SCHED   The thread scheduling attributes will be inherited from the creating thread and the ones in attr are ignored.

	   PTHREAD_EXPLICIT_SCHED  The thread scheduling attributes will be set to the corresponding values in attr.

     The following thread scheduling attributes are affected by inheritsched:

	   o   Scheduling policy; see pthread_attr_setschedpolicy(3).

	   o   Scheduling parameter; see pthread_attr_getschedparam(3).

	   o   Scheduling contention scope; see pthread_attr_getscope(3).

RETURN VALUES

     If successful, both functions return 0.  Otherwise, an error number is returned to indicate the error.

COMPATIBILITY

     The standard leaves it unspecified which (if any) is the default inherit scheduler attribute in a newly initialized attribute object.

ERRORS

     No errors are defined for pthread_attr_getinheritsched().

     The pthread_attr_setinheritsched() function may fail if:

     [EINVAL]		The value specified by inheritsched is invalid.

SEE ALSO

     pthread_attr(3)

STANDARDS

     Both functions conform to IEEE Std 1003.1-2008 (``POSIX.1'').

BSD
								   July 7, 2010 							       BSD

Linux and UNIX Man Pages

pthread_attr_getinheritsched(3p) [suse man page]

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