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[smlnj] View of /sml/trunk/src/MLRISC/gc-safety/gc-cells.sig
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View of /sml/trunk/src/MLRISC/gc-safety/gc-cells.sig

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Revision 586 - (download) (as text) (annotate)
Thu Mar 30 05:08:07 2000 UTC (20 years, 5 months ago) by leunga
File size: 764 byte(s)

   Fixed a slight problem with gc types annotations.

   To turn on gc types, do this:

       CM.autoload "sml/compiler.cm";
       Compiler.Control.MLRISC.getFlag "mlrisc-gc-types" := true;
 * This module provides few helper functions for annotating virtual registers
 * with gc type information. 

signature GC_CELLS =

   structure C  : CELLS
   structure GC : GC_TYPE
   structure GCMap : GC_MAP
      sharing GCMap.GC = GC

   val newGCMap : unit -> GCMap.gcmap  (* create a new gc map *)
   val setGCMap : GCMap.gcmap -> unit  (* set the current gc map *)
   val getGCMap : unit -> GCMap.gcmap  (* get the current gc map *)
   val clearGCMap : unit -> unit       (* remove current gc map *) 

    * Generate a virtual register and update the gc map at the same time.
    * Important note: the gc map must be set by setGCMap before this 
    * function can be invoked.
   val newCell  : C.cellkind -> GC.gctype -> C.cell


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