add C11 thread functions operating on tss_t and once_flag

These all have POSIX equivalents, but aside from tss_get, they all
have minor changes to the signature or return value and thus need to
exist as separate functions.

1 files changed, 8 insertions, 0 deletions

diff --git a/src/thread/call_once.c b/src/thread/call_once.c
new file mode 100644
index 00000000..a7bc9353
--- /dev/null
+++ b/src/thread/call_once.c
@@ -0,0 +1,8 @@
+#include <threads.h>
+
+int __pthread_once(once_flag *, void (*)(void));
+
+void call_once(once_flag *flag, void (*func)(void))
+{
+	__pthread_once(flag, func);
+}