HP 3000 Manuals

HP Pascal/iX Reference Manual

VOLATILE 

VOLATILE is an HP Pascal Option.

You can apply the VOLATILE compiler option to a variable to specify that
the memory location associated with the variable may be modified by other
processes.  Using VOLATILE signals the optimizer that a specified
variable must not reside in a register, but must always be updated.

Syntax 

$VOLATILE$

Location      The VOLATILE compiler option is allowed after the ":" in a
              VAR declaration.  It is also allowed after a "^" in a
              pointer type or variable declaration.

Example 

     TYPE
        ptrtype = ^$VOLATILE$ rectype;

     VAR
        intptrr : ^$VOLATILE$ integer;
        recvar  : $VOLATILE$ rectype;

MPE/iX 5.0 Documentation