write_http plugin: Implement support for multiple destinations.

[collectd.git] / src / plugin.c

diff --git a/src/plugin.c b/src/plugin.c
index b150cf6..7f37fa7 100644 (file)
--- a/src/plugin.c
+++ b/src/plugin.c
@@ -1205,8 +1205,14 @@ void plugin_shutdown_all (void)
                (*callback) ();
        }
 
-       destroy_all_callbacks (&list_write);
+       /* Write plugins which use the `user_data' pointer usually need the
+        * same data available to the flush callback. If this is the case, set
+        * the free_function to NULL when registering the flush callback and to
+        * the real free function when registering the write callback. This way
+        * the data isn't freed twice. */
        destroy_all_callbacks (&list_flush);
+       destroy_all_callbacks (&list_write);
+
        destroy_all_callbacks (&list_notification);
        destroy_all_callbacks (&list_shutdown);
        destroy_all_callbacks (&list_log);