pthread_attr_setschedparam(3P)			pthread_attr_setschedparam(3P)

NAME    [Toc]    [Back]

     pthread_attr_setschedparam, pthread_attr_getschedparam - manage thread
     scheduling	priority attributes

C SYNOPSIS    [Toc]    [Back]

     #include <pthread.h>

     int pthread_attr_setschedparam(pthread_attr_t *attr,
	  const	struct sched_param *param);

     int pthread_attr_getschedparam(const pthread_attr_t *attr,
	  struct sched_param *oparam);

DESCRIPTION    [Toc]    [Back]

     Scheduling	parameters exist to implement scheduling policies [see
     pthread_attr_setschedpolicy()].  The sched_priority member	of the
     sched_param structure is a	positive integer number	(higher	values
     indicate greater importance).  Priority limits should be retrieved	using
     the interfaces sched_get_priority_min() and sched_get_priority_max().
     The default scheduling priority is	the minimum for	the policy.  A
     portable application should not assume more than 32 distinct priorities.

     The pthread_attr_setschedparam() function sets the	thread scheduling
     parameters	attribute in the object	attr, from the values in param.	 In
     order to use the scheduling parameters from the attribute object the
     inherit attribute must be PTHREAD_EXPLICIT_SCHED (this is the default)
     [see pthread_attr_setinheritsched()].  The	current	scheduling parameters
     for the attribute object attr, are	returned via the oparam	parameter of
     pthread_attr_getschedparam().

DIAGNOSTICS    [Toc]    [Back]

     On	success	pthread_attr_setschedparam() returns zero; otherwise an	error
     number is returned:

     [EINVAL]	    The	value of param is out of range.

     pthread_attr_getschedparam() always returns zero.

SEE ALSO    [Toc]    [Back]

     pthread_attr_setinheritsched(3P), pthread_attr_setschedpolicy(3P),
     pthread_attr_setscope(3P),	sched_get_priority_max(3P),
     sched_get_priority_min(3P).


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