add C11 condition variable functions

Because of the clear separation for private pthread_cond_t these
interfaces are quite simple and direct.

1 files changed, 10 insertions, 0 deletions

diff --git a/src/thread/cnd_signal.c b/src/thread/cnd_signal.c
new file mode 100644
index 00000000..1211260b
--- /dev/null
+++ b/src/thread/cnd_signal.c
@@ -0,0 +1,10 @@
+#include <threads.h>
+
+int __private_cond_signal(cnd_t *, int);
+
+int cnd_signal(cnd_t *c)
+{
+	/* This internal function never fails, and always returns zero,
+	 * which matches the value thrd_success is defined with. */
+	return __private_cond_signal(c, 1);
+}