revert: global err channel

examples/multiple/main.go

@@ -15,7 +15,7 @@ import (
 func main() { mainthread.Init(fn) }
 func fn() {
 	wg := sync.WaitGroup{}
-	wg.Add(3)
+	wg.Add(2)
 	go func() {
 		defer wg.Done()
 
@@ -32,20 +32,6 @@ func fn() {
 			log.Println(err)
 		}
 	}()
-	go func() {
-		defer wg.Done()
-
-		err := listenHotkey(hotkey.KeyA, hotkey.ModCtrl, hotkey.ModShift)
-		if err != nil {
-			log.Println(err)
-		}
-	}()
-
-	go func() {
-		<-hotkey.Err()
-		log.Println("some key binding has failed")
-		wg.Done()
-	}()
 
 	wg.Wait()
 }

hotkey.go

@@ -44,20 +44,6 @@ import (
 	"runtime"
 )
 
-var (
-	errIn  chan<- Event
-	errOut <-chan Event
-)
-
-// Err returns a channel that receives a signal when an unexpected error has occured.
-// On Linux systems using X11 this indicates a failed XGrabKey.
-// Not used for Windows and Darwin
-func Err() <-chan Event { return errOut }
-
-func init() {
-	errIn, errOut = newEventChan()
-}
-
 // Event represents a hotkey event
 type Event struct{}
 

hotkey_linux.c

@@ -11,15 +11,13 @@
 #include <X11/Xlib.h>
 #include <X11/Xutil.h>
 
-extern void err();
 extern void hotkeyDown(uintptr_t hkhandle);
 extern void hotkeyUp(uintptr_t hkhandle);
 
 static int xErrHandler(Display* d, XErrorEvent* pErr)
 {
 	if( pErr->request_code == 33 ){  // X_GrabKey
 		if( pErr->error_code == BadAccess ){
-			err();
 			return 0;
 		}
 	} else {
@@ -61,7 +59,6 @@ int waitHotkey(uintptr_t hkhandle, unsigned int mod, int key) {
 	}
 	int keycode = XKeysymToKeycode(d, key);
 	XGrabKey(d, keycode, mod, DefaultRootWindow(d), False, GrabModeAsync, GrabModeAsync);
-
 	XSelectInput(d, DefaultRootWindow(d), KeyPressMask);
 	XEvent ev;
 	while(1) {

hotkey_linux.go

@@ -44,11 +44,6 @@ func init() {
 	}
 }
 
-//export err
-func err() {
-	errIn <- Event{}
-}
-
 type platformHotkey struct {
 	mu         sync.Mutex
 	registered bool