tevent: make sure tevent_backend_init() only runs once

Signed-off-by: Stefan Metzmacher <metze@samba.org>

diff --git a/lib/tevent/tevent.c b/lib/tevent/tevent.c
index 63524710da5c4167986c031876938cd3d36ad320..669b778eb5d721f3fd3444205ff05c71956e2f0c 100644 (file)
--- a/lib/tevent/tevent.c
+++ b/lib/tevent/tevent.c
@@ -112,6 +112,14 @@ void tevent_set_default_backend(const char *backend)
 */
 static void tevent_backend_init(void)
 {
+       static bool done;
+
+       if (done) {
+               return;
+       }
+
+       done = true;
+
        tevent_select_init();
        tevent_poll_init();
        tevent_poll_mt_init();