Add glib main loop integration, use it in flower client.

wayland-glib.c

@@ -0,0 +1,83 @@
+#include <stdint.h>
+#include <glib/giochannel.h>
+#include "wayland-client.h"
+#include "wayland-glib.h"
+
+struct _WaylandSource {
+	GSource source;
+	GPollFD pfd;
+	uint32_t mask;
+	struct wl_display *display;
+};
+
+static gboolean
+wayland_source_prepare(GSource *base, gint *timeout)
+{
+	WaylandSource *source = (WaylandSource *) base;
+
+	*timeout = -1;
+
+	/* We have to add/remove the GPollFD if we want to update our
+	 * poll event mask dynamically.  Instead, let's just flush all
+	 * write on idle instead, which is what this amounts to. */
+
+	while (source->mask & WL_DISPLAY_WRITABLE)
+		wl_display_iterate(source->display,
+				   WL_DISPLAY_WRITABLE);
+
+	return FALSE;
+}
+
+static gboolean
+wayland_source_check(GSource *base)
+{
+	WaylandSource *source = (WaylandSource *) base;
+
+	return source->pfd.revents;
+}
+
+static gboolean
+wayland_source_dispatch(GSource *base,
+			GSourceFunc callback,
+			gpointer data)
+{
+	WaylandSource *source = (WaylandSource *) base;
+
+	wl_display_iterate(source->display,
+			   WL_DISPLAY_READABLE | WL_DISPLAY_WRITABLE);
+
+	return TRUE;
+}
+
+static GSourceFuncs wayland_source_funcs = {
+	wayland_source_prepare,
+	wayland_source_check,
+	wayland_source_dispatch,
+	NULL
+};
+
+static int
+wayland_source_update(uint32_t mask, void *data)
+{
+	WaylandSource *source = data;
+
+	source->mask = mask;
+
+	return 0;
+}
+
+GSource *
+wayland_source_new(struct wl_display *display)
+{
+	WaylandSource *source;
+
+	source = (WaylandSource *) g_source_new(&wayland_source_funcs,
+						sizeof (WaylandSource));
+	source->display = display;
+	source->pfd.fd = wl_display_get_fd(display,
+					   wayland_source_update, source);
+	source->pfd.events = G_IO_IN | G_IO_ERR;
+	g_source_add_poll(&source->source, &source->pfd);
+
+	return &source->source;
+}