1 files changed, 22 insertions, 0 deletions
diff --git a/library/states.ml b/library/states.ml
new file mode 100644
index 000000000..2e198e36f
--- /dev/null
+++ b/library/states.ml
@@ -0,0 +1,22 @@
+
+(* $Id$ *)
+
+open System
+open Lib
+open Summary
+
+type state = Lib.frozen * Summary.frozen
+
+let get_state () =
+  (Lib.freeze(), freeze_summaries())
+
+let set_state (fl,fs) =
+  Lib.unfreeze fl;
+  unfreeze_summaries fs
+
+let state_magic_number = 19764
+
+let (extern_state,intern_state) =
+  let (raw_extern, raw_intern) = extern_intern state_magic_number ".coq" in
+  (fun s -> raw_extern s (get_state())),
+  (fun s -> set_state (raw_intern s))