[PATCH 2/2] ruby: enable garbage collection using talloc

[Felipe Contreras <felipe.contreras@gmail.com>]

We basically steal all the objects from their notmuch parents, therefore
they are completely under Ruby's gc control.

The order at which these objects are freed does not matter any more,
because destroying the database does not destroy all the children
objects, since they belong to Ruby now.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
---
 bindings/ruby/database.c |  2 +-
 bindings/ruby/defs.h     | 11 +++++++----
 bindings/ruby/extconf.rb |  1 +
 3 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/bindings/ruby/database.c b/bindings/ruby/database.c
index 66100de2..3737be17 100644
--- a/bindings/ruby/database.c
+++ b/bindings/ruby/database.c
@@ -81,7 +81,7 @@ notmuch_rb_database_initialize (int argc, VALUE *argv, VALUE self)
 	ret = notmuch_database_open (path, mode, &database);
     notmuch_rb_status_raise (ret);
 
-    DATA_PTR (self) = notmuch_rb_object_create (database);
+    DATA_PTR (self) = notmuch_rb_object_create (database, "notmuch_rb_database");
 
     return self;
 }
diff --git a/bindings/ruby/defs.h b/bindings/ruby/defs.h
index 1413eb72..5cebd5fa 100644
--- a/bindings/ruby/defs.h
+++ b/bindings/ruby/defs.h
@@ -23,6 +23,7 @@
 
 #include <notmuch.h>
 #include <ruby.h>
+#include <talloc.h>
 
 extern VALUE notmuch_rb_cDatabase;
 extern VALUE notmuch_rb_cDirectory;
@@ -83,7 +84,7 @@ extern const rb_data_type_t notmuch_rb_tags_type;
     } while (0)
 
 #define Data_Wrap_Notmuch_Object(klass, type, ptr) \
-    TypedData_Wrap_Struct ((klass), (type), notmuch_rb_object_create ((ptr)))
+    TypedData_Wrap_Struct ((klass), (type), notmuch_rb_object_create ((ptr), "notmuch_rb_object: " __location__))
 
 #define Data_Get_Notmuch_Database(obj, ptr) \
     Data_Get_Notmuch_Object ((obj), &notmuch_rb_database_type, (ptr))
@@ -117,20 +118,22 @@ typedef struct {
 } notmuch_rb_object_t;
 
 static inline void *
-notmuch_rb_object_create (void *nm_object)
+notmuch_rb_object_create (void *nm_object, const char *name)
 {
-    notmuch_rb_object_t *rb_wrapper = malloc (sizeof (*rb_wrapper));
+    notmuch_rb_object_t *rb_wrapper = talloc_named_const (NULL, sizeof (*rb_wrapper), name);
+
     if (RB_UNLIKELY (!rb_wrapper))
 	return NULL;
 
     rb_wrapper->nm_object = nm_object;
+    talloc_steal (rb_wrapper, nm_object);
     return rb_wrapper;
 }
 
 static inline void
 notmuch_rb_object_free (void *rb_wrapper)
 {
-    free (rb_wrapper);
+    talloc_free (rb_wrapper);
 }
 
 static inline notmuch_status_t
diff --git a/bindings/ruby/extconf.rb b/bindings/ruby/extconf.rb
index 161de5a2..d914537c 100644
--- a/bindings/ruby/extconf.rb
+++ b/bindings/ruby/extconf.rb
@@ -19,6 +19,7 @@ if not ENV['LIBNOTMUCH']
 end
 
 $LOCAL_LIBS += ENV['LIBNOTMUCH']
+$LIBS += " -ltalloc"
 
 # Create Makefile
 dir_config('notmuch')
-- 
2.31.1