Arguments

 

inadr

   OpenVMS usage:address_range
   type:         longword (unsigned)
   access:       read only
   mechanism:    by reference
   Starting and ending virtual addresses of the pages to be
   deleted. The inadr argument is the address of a 2-longword array
   containing, in order, the starting and ending process virtual
   addresses. If the starting and ending virtual addresses are the
   same, a single page is deleted. The addresses are adjusted up or
   down to fall on CPU-specific page boundaries. Only the virtual
   page number portion of each virtual address is used; the low-
   order byte-within-page bits are ignored.

   The $DELTVA service deletes pages starting at the address
   contained in the second longword of the inadr argument and ending
   at the address in the first longword. Thus, if you use the same
   address array for both the Create Virtual Address Space ($CRETVA)
   and the $DELTVA services, the pages are deleted in the reverse
   order from which they were created.
 

retadr

   OpenVMS usage:address_range
   type:         longword (unsigned)
   access:       write only
   mechanism:    by reference
   Starting and ending process virtual addresses of the pages that
   $DELTVA has deleted. The retadr argument is the address of a
   2-longword array containing, in order, the starting and ending
   process virtual addresses.
 

acmode

   OpenVMS usage:access_mode
   type:         longword (unsigned)
   access:       read only
   mechanism:    by value
   Access mode on behalf of which the service is to be performed.
   The acmode argument is a longword containing the access mode.

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