py/modsys: Initial implementation of sys.getsizeof().

Implemented as a new MP_UNARY_OP. This patch adds support lists, dicts and
instances.

1 files changed, 6 insertions, 0 deletions

diff --git a/py/objdict.c b/py/objdict.c
index a272ebdb6..f6357a905 100644
--- a/py/objdict.c
+++ b/py/objdict.c
@@ -105,6 +105,12 @@ STATIC mp_obj_t dict_unary_op(mp_uint_t op, mp_obj_t self_in) {
     switch (op) {
         case MP_UNARY_OP_BOOL: return mp_obj_new_bool(self->map.used != 0);
         case MP_UNARY_OP_LEN: return MP_OBJ_NEW_SMALL_INT(self->map.used);
+        #if MICROPY_PY_SYS_GETSIZEOF
+        case MP_UNARY_OP_SIZEOF: {
+            size_t sz = sizeof(*self) + sizeof(*self->map.table) * self->map.alloc;
+            return MP_OBJ_NEW_SMALL_INT(sz);
+        }
+        #endif
         default: return MP_OBJ_NULL; // op not supported
     }
 }