1 files changed, 35 insertions, 0 deletions
diff --git a/includes/rts/StablePtr.h b/includes/rts/StablePtr.h
new file mode 100644
index 0000000000..0d3642fbfe
--- /dev/null
+++ b/includes/rts/StablePtr.h
@@ -0,0 +1,35 @@
+/* -----------------------------------------------------------------------------
+ *
+ * (c) The GHC Team, 1998-2009
+ *
+ * Stable Pointers
+ *
+ * Do not #include this file directly: #include "Rts.h" instead.
+ *
+ * To understand the structure of the RTS headers, see the wiki:
+ *   http://ghc.haskell.org/trac/ghc/wiki/Commentary/SourceTree/Includes
+ *
+ * ---------------------------------------------------------------------------*/
+
+#pragma once
+
+EXTERN_INLINE StgPtr deRefStablePtr (StgStablePtr stable_ptr);
+StgStablePtr getStablePtr  (StgPtr p);
+
+/* -----------------------------------------------------------------------------
+   PRIVATE from here.
+   -------------------------------------------------------------------------- */
+
+typedef struct {
+    StgPtr addr;         // Haskell object when entry is in use, next free
+                         // entry (NULL when this is the last free entry)
+                         // otherwise.
+} spEntry;
+
+extern DLL_IMPORT_RTS spEntry *stable_ptr_table;
+
+EXTERN_INLINE
+StgPtr deRefStablePtr(StgStablePtr sp)
+{
+    return stable_ptr_table[(StgWord)sp].addr;
+}