@@ -13,26 +13,38 @@
  * file.
  */
 
 #include "objfw-defs.h"
 
-#include "platform.h"
+#import "macros.h"
+
+/** @file */
 
 #if defined(OF_HAVE_PTHREADS)
 # include <pthread.h>
-typedef pthread_once_t of_once_t;
-# define OF_ONCE_INIT PTHREAD_ONCE_INIT
+typedef pthread_once_t OFOnceControl;
+# define OFOnceControlInitValue PTHREAD_ONCE_INIT
 #elif defined(OF_HAVE_ATOMIC_OPS)
-typedef volatile int of_once_t;
-# define OF_ONCE_INIT 0
+typedef volatile int OFOnceControl;
+# define OFOnceControlInitValue 0
 #elif defined(OF_AMIGAOS) || !defined(OF_HAVE_THREADS)
-typedef int of_once_t;
-# define OF_ONCE_INIT 0
+typedef int OFOnceControl;
+# define OFOnceControlInitValue 0
 #endif
+
+typedef void (*OFOnceFunction)(void);
 
 #ifdef __cplusplus
 extern "C" {
 #endif
-extern void of_once(of_once_t *control, void (*func)(void));
+/**
+ * @brief A method to call a function only once in a thread-safe manner.
+ *
+ * @param control The once control. This needs to be set to
+ *	  OFOnceControlInitValue at compile time.
+ * @param func The function to call only once
+ */
+extern void OFOnce(OFOnceControl *_Nonnull control,
+    OFOnceFunction _Nonnull func);
 #ifdef __cplusplus
 }
 #endif