tree-wide: introduce free_and_replace helper

It's a common pattern, so add a helper for it. A macro is necessary
because a function that takes a pointer to a pointer would be type specific,
similarly to cleanup functions. Seems better to use a macro.

1 files changed, 1 insertions, 3 deletions

diff --git a/src/core/service.c b/src/core/service.c
index 63045ede55..c949de9cbe 100644
--- a/src/core/service.c
+++ b/src/core/service.c
@@ -3088,9 +3088,7 @@ static void service_notify_message(Unit *u, pid_t pid, char **tags, FDSet *fds)
 
                 if (!streq_ptr(s->status_text, t)) {
 
-                        free(s->status_text);
-                        s->status_text = t;
-                        t = NULL;
+                        free_and_replace(s->status_text, t);
 
                         notify_dbus = true;
                 }