1 files changed, 12 insertions, 0 deletions

diff --git a/nacl/curvecp/blocking.c b/nacl/curvecp/blocking.c
new file mode 100644
index 00000000..1594259c
--- /dev/null
+++ b/nacl/curvecp/blocking.c
@@ -0,0 +1,12 @@
+#include <fcntl.h>
+#include "blocking.h"
+
+void blocking_enable(int fd)
+{
+  fcntl(fd,F_SETFL,fcntl(fd,F_GETFL,0) & ~O_NONBLOCK);
+}
+
+void blocking_disable(int fd)
+{
+  fcntl(fd,F_SETFL,fcntl(fd,F_GETFL,0) | O_NONBLOCK);
+}