_lwp_getscheduler(2)						System Calls Manual					      _lwp_getscheduler(2)

NAME

       _lwp_getscheduler() - get LWP(Lightweight Process) scheduling policy and parameters

SYNOPSIS

DESCRIPTION

       The function allows the scheduling policy and parameters of an individual LWP within any process to be retrieved.

       The  cmd  argument  determines  the action to be performed by the system call.  The following command is available. Other values of cmd are
       reserved for use by HP and may change without notice.  The behavior of _lwp_getscheduler is undefined if any other value is passed  to  the
       cmd argument and it may change without notice.

	      This request retrieves the scheduling policy and associated scheduling
		     parameters  for  the  LWP	whose LWP ID is specified by target_lwp and store those in policy and param, respectively.  If the
		     value of target_lwp is zero(0), the target LWP will be the calling LWP.

       The priority value returned shall be the value specified by the most recent call affecting the target LWP(s) and will not reflect any  tem-
       porary adjustments to its priority as a result of any priority inheritance or ceiling functions.

       Refer  to  the  rtsched(2)  manpage for a complete description of scheduling policies and priorities available.	is similar to the function
       except that it operates on lightweight processes instead of processes.

RETURN VALUE

       Upon successful completion, returns with a value of 0; otherwise, it returns an error number to indicate the error.  The  variable  is  NOT
       set if an error occurs.

ERRORS

       For each of the following conditions, if the condition is detected, the function fails and returns the corresponding error number:

	      The target process could not be accessed due to compartmental restrictions.

	      The	     param parameter or the policy parameter points to an illegal address.

	      The	     cmd parameter is invalid.

	      No LWP can be found corresponding to that specified by
			     target_lwp.

WARNINGS

       In  general,  the  POSIX pthread interfaces should be used by multi-threaded applications.  This system call may be used directly only when
       the application has a need to operate on LWPs in another process.  This system call may result in undefined behavior if the usage is  mixed
       with POSIX pthread APIs.

SEE ALSO

       _lwp_setscheduler(2), sched_getscheduler(2), pthread_getschedparam(3t).

															      _lwp_getscheduler(2)