win32: implement wakeup_event_loop

src/api/win32/callback.rs

@@ -281,6 +281,12 @@ pub unsafe extern "system" fn callback(window: winapi::HWND, msg: winapi::UINT,
             0
         },
 
+        x if x == *super::WAKEUP_MSG_ID => {
+            use events::Event::Awakened;
+            send_event(window, Awakened);
+            0
+        },
+
         _ => {
             user32::DefWindowProcW(window, msg, wparam, lparam)
         }

src/api/win32/mod.rs

@@ -38,6 +38,10 @@ mod event;
 mod init;
 mod monitor;
 
+lazy_static! {
+    static ref WAKEUP_MSG_ID: u32 = unsafe { user32::RegisterWindowMessageA("Glutin::EventID".as_ptr() as *const i8) };
+}
+
 /// The Win32 implementation of the main `Window` object.
 pub struct Window {
     /// Main handle for the window.
@@ -75,11 +79,15 @@ impl Drop for WindowWrapper {
 }
 
 #[derive(Clone)]
-pub struct WindowProxy;
+pub struct WindowProxy {
+    hwnd: winapi::HWND,
+}
 
 impl WindowProxy {
     pub fn wakeup_event_loop(&self) {
-        unimplemented!()
+        unsafe {
+            user32::PostMessageA(self.hwnd, *WAKEUP_MSG_ID, 0, 0);
+        }
     }
 }
 
@@ -189,7 +197,7 @@ impl Window {
     }
 
     pub fn create_window_proxy(&self) -> WindowProxy {
-        WindowProxy
+        WindowProxy { hwnd: self.window.0 }
     }
 
     /// See the docs in the crate root file.