decouple gral_run_on_main_thread from the window

gral.h

@@ -157,11 +157,12 @@ void gral_window_show_open_file_dialog(struct gral_window *window, void (*callba
 void gral_window_show_save_file_dialog(struct gral_window *window, void (*callback)(char const *file, void *user_data), void *user_data);
 void gral_window_clipboard_copy(struct gral_window *window, char const *text);
 void gral_window_clipboard_paste(struct gral_window *window, void (*callback)(char const *text, void *user_data), void *user_data);
-void gral_window_run_on_main_thread(struct gral_window *window, void (*callback)(void *user_data), void *user_data);
 
 struct gral_timer *gral_timer_create(int milliseconds, void (*callback)(void *user_data), void *user_data);
 void gral_timer_delete(struct gral_timer *timer);
 
+void gral_run_on_main_thread(void (*callback)(void *user_data), void *user_data);
+
 
 /*=========
     FILE

gral_linux.c

@@ -638,25 +638,6 @@ void gral_window_clipboard_paste(struct gral_window *window, void (*callback)(ch
 	gtk_clipboard_request_text(clipboard, paste_callback, callback_data);
 }
 
-typedef struct {
-	void (*callback)(void *user_data);
-	void *user_data;
-} IdleCallbackData;
-static gboolean idle_callback(gpointer user_data) {
-	IdleCallbackData *callback_data = user_data;
-	callback_data->callback(callback_data->user_data);
-	return G_SOURCE_REMOVE;
-}
-static void idle_destroy(gpointer user_data) {
-	g_slice_free(IdleCallbackData, user_data);
-}
-void gral_window_run_on_main_thread(struct gral_window *window, void (*callback)(void *user_data), void *user_data) {
-	IdleCallbackData *callback_data = g_slice_new(IdleCallbackData);
-	callback_data->callback = callback;
-	callback_data->user_data = user_data;
-	gdk_threads_add_idle_full(G_PRIORITY_DEFAULT_IDLE, idle_callback, callback_data, idle_destroy);
-}
-
 typedef struct {
 	void (*callback)(void *user_data);
 	void *user_data;
@@ -682,6 +663,25 @@ void gral_timer_delete(struct gral_timer *timer) {
 	g_source_remove((guint)(intptr_t)timer);
 }
 
+typedef struct {
+	void (*callback)(void *user_data);
+	void *user_data;
+} IdleCallbackData;
+static gboolean idle_callback(gpointer user_data) {
+	IdleCallbackData *callback_data = user_data;
+	callback_data->callback(callback_data->user_data);
+	return G_SOURCE_REMOVE;
+}
+static void idle_destroy(gpointer user_data) {
+	g_slice_free(IdleCallbackData, user_data);
+}
+void gral_run_on_main_thread(void (*callback)(void *user_data), void *user_data) {
+	IdleCallbackData *callback_data = g_slice_new(IdleCallbackData);
+	callback_data->callback = callback;
+	callback_data->user_data = user_data;
+	gdk_threads_add_idle_full(G_PRIORITY_DEFAULT_IDLE, idle_callback, callback_data, idle_destroy);
+}
+
 
 /*=========
     FILE

gral_macos.m

@@ -667,48 +667,48 @@ void gral_window_clipboard_paste(struct gral_window *window, void (*callback)(ch
 	}
 }
 
-@interface MainThreadCallbackObject: NSObject {
+@interface TimerCallbackObject: NSObject {
 @public
 	void (*callback)(void *user_data);
 	void *user_data;
 }
 @end
-@implementation MainThreadCallbackObject
-- (void)invoke:(id)object {
+@implementation TimerCallbackObject
+- (void)invoke:(NSTimer *)timer {
 	callback(user_data);
 }
 @end
-void gral_window_run_on_main_thread(struct gral_window *window, void (*callback)(void *user_data), void *user_data) {
-	MainThreadCallbackObject *callback_object = [[MainThreadCallbackObject alloc] init];
+
+struct gral_timer *gral_timer_create(int milliseconds, void (*callback)(void *user_data), void *user_data) {
+	TimerCallbackObject *callback_object = [[TimerCallbackObject alloc] init];
 	callback_object->callback = callback;
 	callback_object->user_data = user_data;
-	[callback_object performSelectorOnMainThread:@selector(invoke:) withObject:nil waitUntilDone:NO];
+	NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:milliseconds/1000.0 target:callback_object selector:@selector(invoke:) userInfo:nil repeats:YES];
 	[callback_object release];
+	return (struct gral_timer *)timer;
 }
 
-@interface TimerCallbackObject: NSObject {
+void gral_timer_delete(struct gral_timer *timer) {
+	[(NSTimer *)timer invalidate];
+}
+
+@interface MainThreadCallbackObject: NSObject {
 @public
 	void (*callback)(void *user_data);
 	void *user_data;
 }
 @end
-@implementation TimerCallbackObject
-- (void)invoke:(NSTimer *)timer {
+@implementation MainThreadCallbackObject
+- (void)invoke:(id)object {
 	callback(user_data);
 }
 @end
-
-struct gral_timer *gral_timer_create(int milliseconds, void (*callback)(void *user_data), void *user_data) {
-	TimerCallbackObject *callback_object = [[TimerCallbackObject alloc] init];
+void gral_run_on_main_thread(void (*callback)(void *user_data), void *user_data) {
+	MainThreadCallbackObject *callback_object = [[MainThreadCallbackObject alloc] init];
 	callback_object->callback = callback;
 	callback_object->user_data = user_data;
-	NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:milliseconds/1000.0 target:callback_object selector:@selector(invoke:) userInfo:nil repeats:YES];
+	[callback_object performSelectorOnMainThread:@selector(invoke:) withObject:nil waitUntilDone:NO];
 	[callback_object release];
-	return (struct gral_timer *)timer;
-}
-
-void gral_timer_delete(struct gral_timer *timer) {
-	[(NSTimer *)timer invalidate];
 }
 
 

gral_windows.cpp

@@ -152,6 +152,7 @@ static ID2D1Factory *factory;
 static ID2D1StrokeStyle *stroke_style;
 static IWICImagingFactory *imaging_factory;
 static IDWriteFactory *dwrite_factory;
+static DWORD main_thread_id;
 
 struct gral_draw_context {
 	ID2D1HwndRenderTarget *target;
@@ -534,6 +535,7 @@ void gral_application_delete(gral_application *application) {
 }
 
 int gral_application_run(gral_application *application, int argc_, char **argv_) {
+	main_thread_id = GetCurrentThreadId();
 	int argc;
 	LPWSTR *argv = CommandLineToArgvW(GetCommandLine(), &argc);
 	if (argc > 1) {
@@ -1052,27 +1054,6 @@ void gral_window_clipboard_paste(gral_window *window, void (*callback)(char cons
 	CloseClipboard();
 }
 
-struct MainThreadCallbackData {
-	void (*callback)(void *user_data);
-	void *user_data;
-};
-
-static void CALLBACK main_thread_completion_routine(ULONG_PTR parameter) {
-	MainThreadCallbackData *callback_data = (MainThreadCallbackData *)parameter;
-	callback_data->callback(callback_data->user_data);
-	delete callback_data;
-}
-
-void gral_window_run_on_main_thread(gral_window *window, void (*callback)(void *user_data), void *user_data) {
-	MainThreadCallbackData *callback_data = new MainThreadCallbackData();
-	callback_data->callback = callback;
-	callback_data->user_data = user_data;
-	DWORD thread_id = GetWindowThreadProcessId((HWND)window, NULL);
-	HANDLE thread = OpenThread(THREAD_SET_CONTEXT, FALSE, thread_id);
-	QueueUserAPC(&main_thread_completion_routine, thread, (ULONG_PTR)callback_data);
-	CloseHandle(thread);
-}
-
 static void CALLBACK timer_completion_routine(LPVOID lpArgToCompletionRoutine, DWORD dwTimerLowValue, DWORD dwTimerHighValue) {
 	gral_timer *timer = (gral_timer *)lpArgToCompletionRoutine;
 	timer->callback(timer->user_data);
@@ -1095,6 +1076,26 @@ void gral_timer_delete(gral_timer *timer) {
 	delete timer;
 }
 
+struct MainThreadCallbackData {
+	void (*callback)(void *user_data);
+	void *user_data;
+};
+
+static void CALLBACK main_thread_completion_routine(ULONG_PTR parameter) {
+	MainThreadCallbackData *callback_data = (MainThreadCallbackData *)parameter;
+	callback_data->callback(callback_data->user_data);
+	delete callback_data;
+}
+
+void gral_run_on_main_thread(void (*callback)(void *user_data), void *user_data) {
+	MainThreadCallbackData *callback_data = new MainThreadCallbackData();
+	callback_data->callback = callback;
+	callback_data->user_data = user_data;
+	HANDLE thread = OpenThread(THREAD_SET_CONTEXT, FALSE, main_thread_id);
+	QueueUserAPC(&main_thread_completion_routine, thread, (ULONG_PTR)callback_data);
+	CloseHandle(thread);
+}
+
 
 /*=========
     FILE