Added ordered_list driver and some parts of init ram disk

kernel/drivers/ordered_list.h

@@ -0,0 +1,34 @@
+#ifndef ORDERED_LIST
+#define ORDERED_LIST
+
+#include <stdint.h>
+#include "../libc/string.h"
+
+/* Our list is always in a 'sorted state',
+ * it can store anything that can be casted
+ * to void* */
+typedef void* type_t;
+/* The following predicate should return non-zero
+ * if the first argument is less than the second */
+typedef int8_t (*lessthan_predicate_t)(type_t, type_t);
+typedef struct {
+    type_t *array;
+    uint32_t size;
+    uint32_t max_size;
+    lessthan_predicate_t less_then;
+} ordered_list_t;
+uint8_t standard_lessthan_predicate(type_t a, type_t b);
+
+// Create an ordered list
+ordered_list_t create_ordered_list(uint32_t max_size, lessthan_predicate_t less_than);
+ordered_list_t place_ordered_list(void *addr, uint32_t max_size, lessthan_predicate_t less_than);
+// Destroy an ordered list
+void destroy_ordered_list(ordered_list_t *array);
+// Insert item into the array
+void insert_ordered_list(type_t item, ordered_list_t *array);
+// Find item at given index
+type_t lookup_ordered_list(uint32_t i, ordered_list_t *array);
+// Delete item from the array
+void remove_ordered_list(uint32_t i, ordered_list_t *array);
+
+#endif