DEFINITION MODULE Storage;
(* (C) Copyright 1987,1988 Fitted Software Tools. All rights reserved. *)
This module manages the Modula-2 heap which is defined to be all
the memory between System.HeapTop and System.MemTop.
The Storage procedures will keep System.HeapTop up to date as
the heap expands or shrinks.
FROM SYSTEM IMPORT ADDRESS;
PROCEDURE ALLOCATE( VAR a :ADDRESS; size :CARDINAL );
allocates size bytes in the heap and returns a pointer to
that memory block in a.
PROCEDURE DEALLOCATE( VAR a :ADDRESS; size :CARDINAL );
returns a previously allocated memory block of size size
to the heap.
PROCEDURE Available( size :CARDINAL ) :BOOLEAN;
TRUE if a memory block of size size is available for allocation