PRIOCNTLSET(2-SVR4) RISC/os Reference Manual  PRIOCNTLSET(2-SVR4)



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 structure, which priocntlset
     uses to specify the set of processes whose scheduling pro-
     perties are to be changed.

          typedef struct procset {
            idop_t    p_op;         /* operator connecting left/right sets */
            idtype_t  p_lidtype;   /* left set ID type */
            id_t      p_lid;       /* left set ID */
            idtype_t  p_ridtype;   /* right set ID type */
            id_t      p_rid;       /* right set ID */
          } procset_t;

     p_lidtype and p_lid specify the ID type and ID of one (left)
     set of processes; p_ridtype and p_rid 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.
     p_op 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 p_op and the processes
     they specify are:

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

          POP_AND       set intersection: processes in both left
                        and right sets

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



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PRIOCNTLSET(2-SVR4) RISC/os Reference Manual  PRIOCNTLSET(2-SVR4)



          POP_XOR       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:

          #define   setprocset(psp, op, ltype, lid, rtype, rid) \
          (psp)->p_op       = (op), \
          (psp)->p_lidtype  = (ltype), \
          (psp)->p_lid      = (lid), \
          (psp)->p_ridtype  = (rtype), \
          (psp)->p_rid      = (rid),

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

SEE ALSO
     priocntl(2).




































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