1 files changed, 13 insertions, 0 deletions
diff --git a/lib/libc/internal/util/futex.c b/lib/libc/internal/util/futex.c
new file mode 100644
index 00000000..2f9872a0
--- /dev/null
+++ b/lib/libc/internal/util/futex.c
@@ -0,0 +1,13 @@
+#include <linux/futex.h>
+#include <syscall.h>
+
+int __futex_wait(volatile int *uaddr, int val)
+{
+	return syscall(futex, uaddr, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, val, 0, 0, 0);
+}
+
+int __futex_wake(volatile int *uaddr, int n)
+{
+	/* futex(uaddr, FUTEX_WAKE, val=n, ...) */
+	return syscall(futex, uaddr, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, n, 0, 0, 0);
+}