1 files changed, 9 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/libpthread/pthread_once.c b/mdk-stage1/dietlibc/libpthread/pthread_once.c
new file mode 100644
index 000000000..16d9cb392
--- /dev/null
+++ b/mdk-stage1/dietlibc/libpthread/pthread_once.c
@@ -0,0 +1,9 @@
+#include <pthread.h>
+#include "thread_internal.h"
+
+int __pthread_once (pthread_once_t* once_control, void (*init_routine)(void))
+{
+  if (!(__testandset(once_control))) init_routine();
+  return 0;
+}
+int pthread_once (pthread_once_t* once_control, void (*init_routine)(void)) __attribute__((alias("__pthread_once")));