[project @ 2003-03-28 15:13:52 by sof]

[ghc-hetmet.git] / ghc / includes / Stable.h

diff --git a/ghc/includes/Stable.h b/ghc/includes/Stable.h
index 9c1bfea..c4c2077 100644 (file)
--- a/ghc/includes/Stable.h
+++ b/ghc/includes/Stable.h
@@ -1,5 +1,5 @@
 /* -----------------------------------------------------------------------------
- * $Id: Stable.h,v 1.9 2001/10/23 11:28:02 simonmar Exp $
+ * $Id: Stable.h,v 1.14 2002/12/19 14:25:04 simonmar Exp $
  *
  * (c) The GHC Team, 1998-2000
  *
@@ -12,10 +12,10 @@
  * casting. Size is not a matter, because StgWord is always the same size as
  * a void*.
  *
- * ----------------------------------------------------------------------------*/
+ * ---------------------------------------------------------------------------*/
 
-#define STABLEPTR_WEIGHT_MASK   ((StgWord)0xff << ((sizeof(StgWord)-1) * BITS_PER_BYTE))
-#define STABLEPTR_WEIGHT_SHIFT  (BITS_IN(StgWord) - 8)
+#ifndef STABLE_H
+#define STABLE_H
 
 /* -----------------------------------------------------------------------------
    External C Interface
@@ -33,43 +33,25 @@ extern StgStablePtr   getStablePtr(StgPtr p);
 typedef struct { 
   StgPtr  addr;                        /* Haskell object, free list, or NULL */
   StgPtr  old;                 /* old Haskell object, used during GC */
-  StgWord weight;              /* used for reference counting */
+  StgWord ref;                 /* used for reference counting */
   StgClosure *sn_obj;          /* the StableName object (or NULL) */
 } snEntry;
 
 extern DLL_IMPORT_RTS snEntry *stable_ptr_table;
-extern DLL_IMPORT_RTS snEntry *stable_ptr_free;
 
-extern DLL_IMPORT_RTS unsigned int SPT_size;
+extern void freeStablePtr(StgStablePtr sp);
 
-extern inline StgPtr
-deRefStablePtr(StgStablePtr sp)
+#ifndef RTS_STABLE_C
+extern inline
+#endif
+StgPtr deRefStablePtr(StgStablePtr sp)
 {
-  ASSERT(stable_ptr_table[stgCast(StgWord,sp) & ~STABLEPTR_WEIGHT_MASK].weight > 0);
-  return stable_ptr_table[stgCast(StgWord,sp) & ~STABLEPTR_WEIGHT_MASK].addr;
-}
-
-extern inline void
-freeStablePtr(StgStablePtr sp)
-{
-  StgWord sn = stgCast(StgWord,sp) & ~STABLEPTR_WEIGHT_MASK;
-  
-  ASSERT(sn < SPT_size
-        && stable_ptr_table[sn].addr != NULL
-        && stable_ptr_table[sn].weight > 0);
-  
-  stable_ptr_table[sn].weight += 
-      1 << ((((StgWord)sp & STABLEPTR_WEIGHT_MASK) >> STABLEPTR_WEIGHT_SHIFT) - 1);
-}
-
-extern inline StgStablePtr
-splitStablePtr(StgStablePtr sp)
-{
-  /* doesn't need access to the stable pointer table */
-  StgWord weight = (stgCast(StgWord,sp) & STABLEPTR_WEIGHT_MASK) / 2;
-  return stgCast(StgStablePtr,(stgCast(StgWord,sp) & ~STABLEPTR_WEIGHT_MASK) + weight);
+    ASSERT(stable_ptr_table[(StgWord)sp].ref > 0);
+    return stable_ptr_table[(StgWord)sp].addr;
 }
 
 /* No deRefStableName, because the existence of a stable name doesn't
  * guarantee the existence of the object itself.
  */
+
+#endif