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Modula Definition | 1990-06-14 | 1016 b | 28 lines | [TEXT/PMED] |
- DEFINITION MODULE Storage;
-
- (* This is the management module for the Modula-2 heap. *)
-
- FROM SYSTEM IMPORT ADDRESS;
-
- EXPORT QUALIFIED
- ALLOCATE, DEALLOCATE, Available, CreateHeap, DestroyHeap;
-
- PROCEDURE ALLOCATE (VAR addr : ADDRESS; amount : CARDINAL);
- (* allocates the requested amount of memory (in bytes) and returns the *)
- (* starting address . HALT if the amount is not available *)
-
- PROCEDURE DEALLOCATE (VAR addr : ADDRESS; amount : CARDINAL);
- (* deallocates the given amount of memory (in bytes). HALT if the *)
- (* memory hasn't been allocated by ALLOCATE *)
-
- PROCEDURE Available (amount : CARDINAL) : BOOLEAN;
- (* returns TRUE if an ALLOCATE of the specified amount (in bytes) *)
- (* of memory would be possible *)
-
- PROCEDURE CreateHeap (amount : CARDINAL);
- (* reserves an amount for the heap - takes it from the system *)
-
- PROCEDURE DestroyHeap;
- (* releases the heap - is also done automatically at program end *)
- END Storage.
-