another UI attempt, I guess.

sorry.

src/libui_sdl/libui/unix/main.c

@@ -0,0 +1,108 @@
+// 6 april 2015
+#include "uipriv_unix.h"
+
+uiInitOptions options;
+
+const char *uiInit(uiInitOptions *o)
+{
+	GError *err = NULL;
+	const char *msg;
+
+	options = *o;
+	if (gtk_init_with_args(NULL, NULL, NULL, NULL, NULL, &err) == FALSE) {
+		msg = g_strdup(err->message);
+		g_error_free(err);
+		return msg;
+	}
+	initAlloc();
+	loadFutures();
+	return NULL;
+}
+
+void uiUninit(void)
+{
+	uninitMenus();
+	uninitAlloc();
+}
+
+void uiFreeInitError(const char *err)
+{
+	g_free((gpointer) err);
+}
+
+static gboolean (*iteration)(gboolean) = NULL;
+
+void uiMain(void)
+{
+	iteration = gtk_main_iteration_do;
+	gtk_main();
+}
+
+static gboolean stepsQuit = FALSE;
+
+// the only difference is we ignore the return value from gtk_main_iteration_do(), since it will always be TRUE if gtk_main() was never called
+// gtk_main_iteration_do() will still run the main loop regardless
+static gboolean stepsIteration(gboolean block)
+{
+	gtk_main_iteration_do(block);
+	return stepsQuit;
+}
+
+void uiMainSteps(void)
+{
+	iteration = stepsIteration;
+}
+
+int uiMainStep(int wait)
+{
+	gboolean block;
+
+	block = FALSE;
+	if (wait)
+		block = TRUE;
+	return (*iteration)(block) == FALSE;
+}
+
+// gtk_main_quit() may run immediately, or it may wait for other pending events; "it depends" (thanks mclasen in irc.gimp.net/#gtk+)
+// PostQuitMessage() on Windows always waits, so we must do so too
+// we'll do it by using an idle callback
+static gboolean quit(gpointer data)
+{
+	if (iteration == stepsIteration)
+		stepsQuit = TRUE;
+		// TODO run a gtk_main() here just to do the cleanup steps of syncing the clipboard and other stuff gtk_main() does before it returns
+	else
+		gtk_main_quit();
+	return FALSE;
+}
+
+void uiQuit(void)
+{
+	gdk_threads_add_idle(quit, NULL);
+}
+
+struct queued {
+	void (*f)(void *);
+	void *data;
+};
+
+static gboolean doqueued(gpointer data)
+{
+	struct queued *q = (struct queued *) data;
+
+	(*(q->f))(q->data);
+	g_free(q);
+	return FALSE;
+}
+
+void uiQueueMain(void (*f)(void *data), void *data)
+{
+	struct queued *q;
+
+	// we have to use g_new0()/g_free() because uiAlloc() is only safe to call on the main thread
+	// for some reason it didn't affect me, but it did affect krakjoe
+	q = g_new0(struct queued, 1);
+	q->f = f;
+	q->data = data;
+	gdk_threads_add_idle(doqueued, q);
+}