lib: move deallocation of memory from n_d_close to n_d_destroy

In order to mimic the "best effort" API of Xapian to provide
information from a closed database when possible, do not
destroy the Xapian database object too early.

Because the pointer to a Xapian database is no longer nulled on close,
introduce a flag to track whether the notmuch database is open or not.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/database-private.h b/lib/database-private.h
index 76359007..d2c25313 100644
--- a/lib/database-private.h
+++ b/lib/database-private.h
@@ -194,7 +194,7 @@ struct _notmuch_database {
     /* true if changes have been made in this atomic section */
     bool atomic_dirty;
     Xapian::Database *xapian_db;
-
+    bool open;
     /* Bit mask of features used by this database.  This is a
      * bitwise-OR of NOTMUCH_FEATURE_* values (above). */
     enum _notmuch_features features;