1 files changed, 19 insertions, 0 deletions
diff --git a/ext/sleepy_penguin/nonblock.h b/ext/sleepy_penguin/nonblock.h
new file mode 100644
index 0000000..7198114
--- /dev/null
+++ b/ext/sleepy_penguin/nonblock.h
@@ -0,0 +1,19 @@
+#ifndef SLEEPY_PENGUIN_NONBLOCK_H
+#define SLEEPY_PENGUIN_NONBLOCK_H
+#include <unistd.h>
+#include <fcntl.h>
+#include <ruby.h>
+static void set_nonblock(int fd)
+{
+        int flags = fcntl(fd, F_GETFL);
+
+        if (flags == -1)
+                rb_sys_fail("fcntl(F_GETFL)");
+        if ((flags & O_NONBLOCK) == O_NONBLOCK)
+                return;
+        flags = fcntl(fd, F_SETFL, flags | O_NONBLOCK);
+        if (flags == -1)
+                rb_sys_fail("fcntl(F_SETFL)");
+}
+
+#endif /* SLEEPY_PENGUIN_NONBLOCK_H */