1 files changed, 67 insertions, 0 deletions
diff --git a/src/resource.c b/src/resource.c
new file mode 100644
index 0000000..8d28f64
--- /dev/null
+++ b/src/resource.c
@@ -0,0 +1,67 @@
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <wayland-client.h>
+
+#include "Xlib-wayland.h"
+
+#include "private.h"
+
+union entry {
+	uintptr_t next;
+	void *data;
+};
+
+XID
+csx_display_add_resource(struct csx_display *display, void *p)
+{
+	union entry *e, *map;
+	int size;
+
+	if (display->free_resource > 0) {
+		e = display->resource_map + display->free_resource;
+		display->free_resource = e->next;
+	} else {
+		if (display->resource_count == display->resource_size) {
+			if (display->resource_size == 0)
+				size = 256;
+			else
+				size = display->resource_size * 2;
+			map = realloc(display->resource_map,
+				      size * sizeof *e);
+			if (map == NULL)
+				abort(); /* FIXME: how do we handle OOM? */
+			display->resource_map = map;
+			display->resource_size = size;
+		}
+
+		e = display->resource_map + display->resource_count;
+		display->resource_count++;
+	}
+
+	e->data = p;
+
+	return e - display->resource_map;
+}
+
+void
+csx_display_remove_resource(struct csx_display *display, XID id)
+{
+	union entry *e;
+
+	e = display->resource_map + id;
+	e->next = display->free_resource;
+	display->free_resource = id;
+}
+
+void *
+csx_display_lookup_resource(struct csx_display *display, XID id)
+{
+	/* FIXME: verify that we're looking up a valid resource:
+	 * inside valid range and not in free-list. */
+
+	if (id >= display->resource_size)
+		return NULL;
+
+	return display->resource_map[id].data;
+}