Switch to a scoped lock to avoid missing unlocks in failure returns.

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/12@402769 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/main/channel.c b/main/channel.c
index 0b87b8039c119d193b2c96eaefbcbeeac32f7d78..58b50c820bb8a294e3155219fc8bbb8fb590eb5d 100644 (file)
--- a/main/channel.c
+++ b/main/channel.c
@@ -7595,8 +7595,7 @@ struct varshead *ast_channel_get_manager_vars(struct ast_channel *chan)
        RAII_VAR(struct varshead *, ret, NULL, ao2_cleanup);
        RAII_VAR(struct ast_str *, tmp, NULL, ast_free);
        struct manager_channel_variable *mcv;
-
-       AST_RWLIST_RDLOCK(&channelvars);
+       SCOPED_LOCK(lock, &channelvars, AST_RWLIST_RDLOCK, AST_RWLIST_UNLOCK);
 
        if (AST_LIST_EMPTY(&channelvars)) {
                return NULL;
@@ -7626,13 +7625,11 @@ struct varshead *ast_channel_get_manager_vars(struct ast_channel *chan)
 
                var = ast_var_assign(mcv->name, val ? val : "");
                if (!var) {
-                       AST_RWLIST_UNLOCK(&channelvars);
                        return NULL;
                }
 
                AST_RWLIST_INSERT_TAIL(ret, var, entries);
        }
-       AST_RWLIST_UNLOCK(&channelvars);
 
        ao2_ref(ret, +1);
        return ret;