priocntlset(2)            SYSTEM CALLS             priocntlset(2)



NAME
     priocntlset - generalized process scheduler control

SYNOPSIS
     #include <sys/types.h>
     #include <sys/procset.h>
     #include <sys/priocntl.h>
     #include <sys/rtpriocntl.h>
     #include <sys/tspriocntl.h>

     long priocntlset(procsett *psp, int cmd, ... /* arg */);

DESCRIPTION
     priocntlset changes the  scheduling  properties  of  running
     processes.   priocntlset  has  the  same  functions  as  the
     priocntl system call, but a more general way  of  specifying
     the  set  of processes whose scheduling properties are to be
     changed.  cmd specifies the function to be  performed.   arg
     is  a pointer to a structure whose type depends on cmd.  See
     priocntl(2) for the valid values of cmd and the  correspond-
     ing  arg  structures.   psp is a pointer to a procset struc-
     ture, which priocntlset uses to specify the set of processes
     whose scheduling properties are to be changed.
       typedef struct procset {
         idopt    pop;       /* operator connecting left/right sets */
         idtypet  plidtype;  /* left set ID type */
         idt      plid;      /* left set ID */
         idtypet  pridtype;  /* right set ID type */
         idt      prid;      /* right set ID */
       } procsett;
     plidtype and plid specify  the  ID  type  and  ID  of  one
     (``left'') set of processes; pridtype and prid specify the
     ID type and ID of a second (``right'') set of processes.  ID
     types  and IDs are specified just as for the priocntl system
     call.  pop specifies the operation to be performed  on  the
     two sets of processes to get the set of processes the system
     call is to apply to.  The valid  values  for  pop  and  the
     processes they specify are:

       POPDIFF      set difference: processes in  left  set  and
                     not in right set

       POPAND       set intersection: processes in both left and
                     right sets

       POPOR        set union: processes in either left or right
                     sets or both

       POPXOR       set exclusive-or: processes in left or right
                     set but not in both
     The following macro, which is defined in procset.h, offers a
     convenient way to initialize a procset structure:



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priocntlset(2)            SYSTEM CALLS             priocntlset(2)



          #define   setprocset(psp, op, ltype, lid, rtype, rid) \
          (psp)->pop       = (op), \
          (psp)->plidtype  = (ltype), \
          (psp)->plid      = (lid), \
          (psp)->pridtype  = (rtype), \
          (psp)->prid      = (rid),

DIAGNOSTICS
     priocntlset  has  the  same  return  values  and  errors  as
     priocntl.

SEE ALSO
     priocntl(2) priocntl(1) in the User's Reference Manual










































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