pthread_attr_setinheritsched man page on Debian

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PTHREAD_ATTR_SETINHERITSCHELinux Programmer's MPTHREAD_ATTR_SETINHERITSCHED(3)

NAME
       pthread_attr_setinheritsched,  pthread_attr_getinheritsched  -  set/get
       inherit scheduler attribute in thread attributes object

SYNOPSIS
       #include <pthread.h>

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

       Compile and link with -pthread.

DESCRIPTION
       The pthread_attr_setinheritsched() function sets the inherit  scheduler
       attribute  of  the  thread attributes object referred to by attr to the
       value specified	in  inheritsched.   The	 inherit  scheduler  attribute
       determines  whether a thread created using the thread attributes object
       attr will inherit its scheduling attributes from the calling thread  or
       whether it will take them from attr.

       The following values may be specified in inheritsched:

       PTHREAD_INHERIT_SCHED
	      Threads	that   are   created  using  attr  inherit  scheduling
	      attributes from the creating thread; the	scheduling  attributes
	      in attr are ignored.

       PTHREAD_EXPLICIT_SCHED
	      Threads  that  are  created  using  attr	take  their scheduling
	      attributes from the values specified by the attributes object.

       The default setting of the inherit scheduler attribute in a newly  ini‐
       tialized thread attributes object is PTHREAD_INHERIT_SCHED.

       The   pthread_attr_getinheritsched()   returns  the  inherit  scheduler
       attribute of the thread attributes object attr in the buffer pointed to
       by inheritsched.

RETURN VALUE
       On  success,  these functions return 0; on error, they return a nonzero
       error number.

ERRORS
       pthread_attr_setinheritsched() can fail with the following error:

       EINVAL Invalid value in inheritsched.

       POSIX.1-2001 also documents an optional	ENOTSUP	 error	("attempt  was
       made   to   set	 the   attribute   to	an   unsupported  value")  for
       pthread_attr_setinheritsched().

CONFORMING TO
       POSIX.1-2001.

EXAMPLE
       See pthread_setschedparam(3).

BUGS
       As at glibc 2.8, if a thread attributes	object	is  initialized	 using
       pthread_attr_init(3),  then  the	 scheduling  policy  of the attributes
       object is set to SCHED_OTHER and the scheduling priority is set	to  0.
       However,	  if   the   inherit   scheduler  attribute  is	 then  set  to
       PTHREAD_EXPLICIT_SCHED, then  a	thread	created	 using	the  attribute
       object  wrongly	inherits  its  scheduling attributes from the creating
       thread.	This bug does not occur if either  the	scheduling  policy  or
       scheduling   priority   attribute  is  explicitly  set  in  the	thread
       attributes object before calling pthread_create(3).

SEE ALSO
       sched_setscheduler(2),	pthread_attr_init(3),	pthread_attr_setsched‐
       param(3),       pthread_attr_setschedpolicy(3),	    pthread_create(3),
       pthread_setschedparam(3), pthread_setschedprio(3), pthreads(7)

COLOPHON
       This page is part of release 3.27 of the Linux  man-pages  project.   A
       description  of	the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

Linux				  2008-11-10   PTHREAD_ATTR_SETINHERITSCHED(3)
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