From 9792fc9d137b4dd702360ac0242f9a7a26e675c2 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 21 Sep 2015 18:07:02 +0200
Subject: Add tracer_guard to restore database tracer

---
 bpkg/database | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'bpkg/database')

diff --git a/bpkg/database b/bpkg/database
index c4ace56..05ffb04 100644
--- a/bpkg/database
+++ b/bpkg/database
@@ -17,6 +17,17 @@ namespace bpkg
 
   database
   open (const dir_path& configuration, tracer&, bool create = false);
+
+  struct tracer_guard
+  {
+    tracer_guard (database& db, tracer& t)
+        : db_ (db), t_ (db.tracer ()) {db.tracer (t);}
+    ~tracer_guard () {db_.tracer (*t_);}
+
+  private:
+    database& db_;
+    odb::tracer* t_;
+  };
 }
 
 #endif // BPKG_DATABASE
-- 
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