Migrated uitask_windows.go to the new API.

init.go

@@ -24,6 +24,7 @@ func Go() error {
 	Ready <- struct{}{}
 	close(Ready)
 	ui()
+	return nil
 }
 
 // Ready is pulsed when Go() is ready to begin accepting requests to the safe methods.

uitask_windows.go

@@ -46,10 +46,7 @@ var (
 	_postMessage = user32.NewProc("PostMessageW")
 )
 
-func ui(main func()) error {
+func uiinit() error {
-	runtime.LockOSThread()
-
-	uitask = make(chan interface{})
 	err := doWindowsInit()
 	if err != nil {
 		return fmt.Errorf("error doing general Windows initialization: %v", err)
@@ -60,8 +57,16 @@ func ui(main func()) error {
 		return fmt.Errorf("error making invisible window for handling events: %v", err)
 	}
 
+	// do this only on success just to be safe
+	uitask = make(chan interface{})
+	return nil
+}
+
+func ui() {
 	go func() {
-		for m := range uitask {
+		for {
+			select {
+			case m := <-uitask:
 				r1, _, err := _postMessage.Call(
 					uintptr(hwnd),
 					msgRequested,
@@ -70,11 +75,7 @@ func ui(main func()) error {
 				if r1 == 0 { // failure
 					panic("error sending message to message loop to call function: " + err.Error())
 				}
-		}
+			case <-Stop:
-	}()
-
-	go func() {
-		main()
 				r1, _, err := _postMessage.Call(
 				uintptr(hwnd),
 				msgQuit,
@@ -83,10 +84,11 @@ func ui(main func()) error {
 				if r1 == 0 { // failure
 					panic("error sending quit message to message loop: " + err.Error())
 				}
+			}
+		}
 	}()
 
 	msgloop()
-	return nil
 }
 
 var (