modules Libobject et Summary (partiel)

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@36 85f007b7-540e-0410-9357-904b9bb8a0f7

1 files changed, 48 insertions, 0 deletions

diff --git a/library/summary.ml b/library/summary.ml
new file mode 100644
index 000000000..f58917202
--- /dev/null
+++ b/library/summary.ml
@@ -0,0 +1,48 @@
+
+(* $Id$ *)
+
+open Pp
+open Util
+open Names
+
+type 'a summary_declaration = {
+  freeze_function : unit -> 'a;
+  unfreeze_function : 'a -> unit;
+  init_function : unit -> unit }
+
+let summaries = 
+  (Hashtbl.create 17 : (string, Dyn.t summary_declaration) Hashtbl.t)
+
+let declare_summary sumname sdecl =
+  let (infun,outfun) = Dyn.create (sumname^"-SUMMARY") in
+  let dyn_freeze () = infun (sdecl.freeze_function())
+  and dyn_unfreeze sum = sdecl.unfreeze_function (outfun sum)
+  and dyn_init = sdecl.init_function in
+  let ddecl = {
+    freeze_function = dyn_freeze;
+    unfreeze_function = dyn_unfreeze;
+    init_function = dyn_init} 
+  in
+  if Hashtbl.mem summaries sumname then
+    anomalylabstrm "Summary.declare_summary"
+      [< 'sTR "Cannot declare a summary twice: " ; 'sTR sumname >];
+  Hashtbl.add summaries sumname ddecl
+
+type frozen_summaries = Dyn.t Stringmap.t
+
+let freeze_summaries () =
+  let m = ref Stringmap.empty in
+  Hashtbl.iter 
+    (fun id decl -> m := Stringmap.add id (decl.freeze_function()) !m)
+    summaries;
+  !m
+
+let unfreeze_summaries fs =
+  Hashtbl.iter
+    (fun id decl -> 
+       try decl.unfreeze_function (Stringmap.find id fs)
+       with Not_found -> decl.init_function())
+    summaries
+
+let init_summaries () =
+  Hashtbl.iter (fun _ decl -> decl.init_function()) summaries