enhance marshallable option for freeze (minor TODO in safe_typing)

It can be:
`Yes      Full data, in a state that can be marshalled
`No       Full data, good for Undo only
`Shallow  Partial data, marshallable, good for slave processes

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16682 85f007b7-540e-0410-9357-904b9bb8a0f7

1 files changed, 8 insertions, 1 deletions

diff --git a/proofs/proof_global.ml b/proofs/proof_global.ml
index 0c0aac715..470d19b71 100644
--- a/proofs/proof_global.ml
+++ b/proofs/proof_global.ml
@@ -391,6 +391,13 @@ module V82 = struct
 end
 
 type state = pstate list
-let freeze () = !pstates
+let drop_hook_mode p = { p with hook = None; mode = None }
+        
+let freeze ~marshallable =
+  match marshallable with
+  | `Yes ->
+      Errors.anomaly (Pp.str"full marshalling of proof state not supported")
+  | `Shallow -> List.map drop_hook_mode !pstates
+  | `No -> !pstates
 let unfreeze s = pstates := s; update_proof_mode ()