Allow NULL init and free functions for fr_atexit_global_once

diff --git a/src/lib/util/atexit.h b/src/lib/util/atexit.h
index f98c6360b776e0a1bfcb25ac07853c658440e427..2418ed3f04f432aad804a8bb640277253fbf0d00 100644 (file)
--- a/src/lib/util/atexit.h
+++ b/src/lib/util/atexit.h
@@ -87,8 +87,10 @@ bool         fr_atexit_is_exiting(void);
  *
  * @param[in] _init            function to call. Will be called once
  *                             during the process lifetime.
+ *                             May be NULL.
  * @param[in] _free            function to call. Will be called once
  *                             at exit.
+ *                             May be NULL.
  * @param[in] _uctx            data to be passed to free function.
  */
 #define fr_atexit_global_once(_init, _free, _uctx) \
@@ -99,8 +101,8 @@ bool         fr_atexit_is_exiting(void);
        if (unlikely(!atomic_load(&_init_done))) { \
                pthread_mutex_lock(&_init_mutex); \
                if (!atomic_load(&_init_done)) { \
-                       _init(_our_uctx); \
-                       fr_atexit_global(_free, _our_uctx); \
+                       if (_init) _init(_our_uctx); \
+                       if (_free) fr_atexit_global(_free, _our_uctx); \
                        atomic_store(&_init_done, true); \
                } \
                pthread_mutex_unlock(&_init_mutex); \