application: Add RunOnMainLoop

application.go

@@ -4,6 +4,7 @@ package gocoa
 // #cgo LDFLAGS: -framework Cocoa
 // #include "application.h"
 import "C"
+import "runtime/cgo"
 
 var appDidFinishLaunchingFunc func()
 
@@ -34,3 +35,16 @@ func callOnApplicationDidFinishLaunchingHandler() {
  appDidFinishLaunchingFunc()
  }
 }
+
+//export go_callback
+func go_callback(h C.uintptr_t) {
+ hnd := cgo.Handle(h)
+ fn := hnd.Value().(func())
+ fn()
+ hnd.Delete()
+}
+
+func RunOnMainLoop(fn func()) {
+ h := cgo.NewHandle(fn)
+ C.RunOnMainLoop(C.uintptr_t(h))
+}

application.h

@@ -1,5 +1,7 @@
+#include <stdint.h>
 #import <Cocoa/Cocoa.h>
 
 void InitSharedApplication();
 void RunApplication();
-void TerminateApplication();
+void TerminateApplication();
+void RunOnMainLoop(uintptr_t h);

application.m

@@ -31,4 +31,11 @@ void RunApplication() {
 
 void TerminateApplication() {
  [NSApp terminate:nil];
+}
+
+extern void go_callback(uintptr_t h);
+void RunOnMainLoop(uintptr_t h) {
+ dispatch_async(dispatch_get_main_queue(), ^{
+ go_callback(h);
+ });
 }