+#define array_lock(array) \
+ ((array).locked \
+ || (mlock((array).data, array_byte_len(array)) == 0 \
+ && ((array).locked = true)))
+
+#define array_unlock(array) \
+ if ((array).locked) { \
+ (void)munlock((array).data, array_byte_len(array)); \
+ (array).locked = false; \
+ }
+
+
+/******* ADDING ELEMENTS *******/
+
+#define array_add(array, obj) \
+ do { \
+ array_ensure_capacity_delta(array, 1); \
+ (array).data[(array).len++] = (obj); \
+ } while (0)
+
+#define array_append(array, objs, Len) \
+ do { \
+ const typeof((array).len) __len = (Len); \
+ array_ensure_capacity_delta(array, __len); \
+ memcpy((array).data + (array).len, objs, \
+ __len * sizeof(*(array).data)); \
+ (array).len += __len; \
+ } while (0)
+
+
+/******* ACCESSSING ELEMENTS ********/
+
+/** Getting the n'th element of the array.
+ */