Add an os module containing platform-specific traits

src/os/unix.rs

@@ -0,0 +1,40 @@
+#![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd"))]
+
+use libc;
+use Window;
+use platform::Window as LinuxWindow;
+
+/// Additional methods on `Window` that are specific to unix.
+pub trait WindowExt {
+    /// Returns a pointer to the `Window` object of xlib that is used by this window.
+    ///
+    /// Returns `None` if the window doesn't use xlib (if it uses wayland for example).
+    ///
+    /// The pointer will become invalid when the glutin `Window` is destroyed.
+    fn get_xlib_window(&self) -> Option<*mut libc::c_void>;
+
+    /// Returns a pointer to the `Display` object of xlib that is used by this window.
+    ///
+    /// Returns `None` if the window doesn't use xlib (if it uses wayland for example).
+    ///
+    /// The pointer will become invalid when the glutin `Window` is destroyed.
+    fn get_xlib_display(&self) -> Option<*mut libc::c_void>;
+}
+
+impl WindowExt for Window {
+    #[inline]
+    fn get_xlib_window(&self) -> Option<*mut libc::c_void> {
+        match self.window {
+            LinuxWindow::X(ref w) => Some(w.get_xlib_window()),
+            _ => None
+        }
+    }
+
+    #[inline]
+    fn get_xlib_display(&self) -> Option<*mut libc::c_void> {
+        match self.window {
+            LinuxWindow::X(ref w) => Some(w.get_xlib_window()),
+            _ => None
+        }
+    }
+}