From: Stefano Zacchiroli <zack@upsilon.cc>
Date: Thu, 26 Dec 2002 15:50:06 +0000 (+0000)
Subject: - reimplemented 'clear' method deleting old DBs and recreating them from
X-Git-Tag: v0_3_99~117
X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=34ce9fa57cd6c138454a69b1a0e6675118e3abc7;p=helm.git

- reimplemented 'clear' method deleting old DBs and recreating them from
  scratch
---

diff --git a/helm/http_getter/http_getter_map.ml b/helm/http_getter/http_getter_map.ml
index 9ee876181..07c2c10b4 100644
--- a/helm/http_getter/http_getter_map.ml
+++ b/helm/http_getter/http_getter_map.ml
@@ -24,16 +24,22 @@
  *  http://cs.unibo.it/helm/.
  *)
 
+let debug = true;;
+let debug_print s = if debug then prerr_endline s;;
+
 exception Key_already_in of string;;
 exception Key_not_found of string;;
 
 class map dbname =
   let perm = 420 in (* permission 644 in decimal notation *)
-  let db = Dbm.opendbm dbname [ Dbm.Dbm_rdwr; Dbm.Dbm_create ] perm in
+  let open_dbm () = Dbm.opendbm dbname [ Dbm.Dbm_rdwr; Dbm.Dbm_create ] perm in
+  
   object (self)
 
     inherit ThreadSafe.threadSafe
 
+    val mutable db = open_dbm ()
+
     initializer Gc.finalise Dbm.close db  (* close db on GC *)
 
     method add key value =
@@ -62,7 +68,10 @@ class map dbname =
 
     method clear =
       self#doWriter (lazy (
-        Dbm.iter (fun k _ -> Dbm.remove db k) db
+        Dbm.close db;
+        Sys.remove (dbname ^ ".dir");
+        Sys.remove (dbname ^ ".pag");
+        db <- open_dbm ()
       ))
 
   end