Arguments

 

region_id_64

   OpenVMS usage:region identifier
   type:         quadword (unsigned)
   access:       read only
   mechanism:    by 32- or 64-bit reference
   The region ID associated with the region to be deleted. The
   region ID specified must be one returned by the $CREATE_REGION_64
   service. You cannot specify VA$C_P0, VA$C_P1, or VA$C_P2.
 

acmode

   OpenVMS usage:access_mode
   type:         longword (unsigned)
   access:       read only
   mechanism:    by value
   Access mode associated with the call to $DELETE_REGION_64. The
   acmode argument is a longword containing the access mode.

   The $PSLDEF macro in STARLET.MLB and the file PSLDEF.H in
   SYS$STARLET_C.TLB define the following symbols and their values
   for the four access modes:

   Value      Symbolic Name      Access Mode

   0          PSL$C_KERNEL       Kernel
   1          PSL$C_EXEC         Executive
   2          PSL$C_SUPER        Supervisor
   3          PSL$C_USER         User

   The most privileged access mode used is the access mode of the
   caller. The caller can delete pages only if those pages are owned
   by an access mode equal to or less privileged than the access
   mode of the caller.

   Once all pages are deleted within the region, the region can be
   deleted only if the region is owned by an access mode equal to or
   less privileged than the access mode of the caller.
 

return_va_64

   OpenVMS usage:address
   type:         quadword address
   access:       write only
   mechanism:    by 32- or 64-bit reference
   The lowest process virtual address of the pages that
   $DELETE_REGION_64 has successfully deleted. The return_va_64
   argument is the 32- or 64-bit virtual address of a naturally
   aligned quadword into which the service returns the virtual
   address of the first page deleted. Virtual addresses are deleted
   from low address to high address, regardless of the direction in
   which virtual addresses expand for that region.
 

return_length_64

   OpenVMS usage:byte count
   type:         quadword (unsigned)
   access:       write only
   mechanism:    by 32- or 64-bit reference
   The length of the virtual address range that $DELETE_REGION_64
   has successfully deleted. The return_length_64 argument is the
   32- or 64-bit virtual address of a naturally aligned quadword
   into which the service returns the length of the deleted virtual
   address range in bytes.