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, 9 insertions, 0 deletions

diff --git a/src/thread/cnd_wait.c b/src/thread/cnd_wait.c
new file mode 100644
index 00000000..602796f8
--- /dev/null
+++ b/src/thread/cnd_wait.c
@@ -0,0 +1,9 @@
+#include <threads.h>
+
+int cnd_wait(cnd_t *c, mtx_t *m)
+{
+	/* Calling cnd_timedwait with a null pointer is an extension.
+	 * It is convenient here to avoid duplication of the logic
+	 * for return values. */
+	return cnd_timedwait(c, m, 0);
+}