[RFC Patch 2/2] lib: Let Xapian manage the memory for FieldProcessors

[David Bremner <david@tethera.net>]

It turns out this is exactly what release() is for; Xapian will
deallocate the objects when it's done with them.
---
 lib/database-private.h |  4 ----
 lib/database.cc        | 19 ++++++++-----------
 2 files changed, 8 insertions(+), 15 deletions(-)

diff --git a/lib/database-private.h b/lib/database-private.h
index 32357ce0..3eac3c7e 100644
--- a/lib/database-private.h
+++ b/lib/database-private.h
@@ -194,10 +194,6 @@ struct _notmuch_database {
     Xapian::TermGenerator *term_gen;
     Xapian::ValueRangeProcessor *value_range_processor;
     Xapian::ValueRangeProcessor *date_range_processor;
-#if HAVE_XAPIAN_FIELD_PROCESSOR
-    Xapian::FieldProcessor *date_field_processor;
-    Xapian::FieldProcessor *query_field_processor;
-#endif
     Xapian::ValueRangeProcessor *last_mod_range_processor;
 };
 
diff --git a/lib/database.cc b/lib/database.cc
index b98468a6..c1563ca7 100644
--- a/lib/database.cc
+++ b/lib/database.cc
@@ -1029,10 +1029,14 @@ notmuch_database_open_verbose (const char *path,
 #if HAVE_XAPIAN_FIELD_PROCESSOR
 	/* This currently relies on the query parser to pass anything
 	 * with a .. to the range processor */
-	notmuch->date_field_processor = new DateFieldProcessor();
-	notmuch->query_parser->add_boolean_prefix("date", notmuch->date_field_processor);
-	notmuch->query_field_processor = new QueryFieldProcessor (*notmuch->query_parser, notmuch);
-	notmuch->query_parser->add_boolean_prefix("query", notmuch->query_field_processor);
+	{
+	    Xapian::FieldProcessor * date_fp = new DateFieldProcessor();
+	    Xapian::FieldProcessor * query_fp =
+		new QueryFieldProcessor (*notmuch->query_parser, notmuch);
+
+	    notmuch->query_parser->add_boolean_prefix("date", date_fp->release ());
+	    notmuch->query_parser->add_boolean_prefix("query", query_fp->release ());
+	}
 #endif
 	notmuch->last_mod_range_processor = new Xapian::NumberValueRangeProcessor (NOTMUCH_VALUE_LAST_MOD, "lastmod:");
 
@@ -1125,13 +1129,6 @@ notmuch_database_close (notmuch_database_t *notmuch)
     delete notmuch->last_mod_range_processor;
     notmuch->last_mod_range_processor = NULL;
 
-#if HAVE_XAPIAN_FIELD_PROCESSOR
-    delete notmuch->date_field_processor;
-    notmuch->date_field_processor = NULL;
-    delete notmuch->query_field_processor;
-    notmuch->query_field_processor = NULL;
-#endif
-
     return status;
 }
 
-- 
2.11.0