py/obj: Introduce mp_obj_malloc macro to allocate, and set object type.

This is to replace the following:

    mp_foo_obj_t *self = m_new_obj(mp_foo_obj_t);
    self->base.type = &mp_type_foo;

with:

    mp_foo_obj_t *self = mp_obj_malloc(mp_foo_obj_t, &mp_type_foo);

Calling the function is less code than inlining setting the type
everywhere, adds up to ~100 bytes on PYBV11.

It also helps to avoid an easy mistake of forgetting to set the type.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/py/dynruntime.h b/py/dynruntime.h
index b9dca60d13..32ca708b95 100644
--- a/py/dynruntime.h
+++ b/py/dynruntime.h
@@ -126,6 +126,8 @@ static inline void *m_realloc_dyn(void *ptr, size_t new_num_bytes) {
 #define mp_obj_get_array(o, len, items)     (mp_obj_get_array_dyn((o), (len), (items)))
 #define mp_obj_list_append(list, item)      (mp_fun_table.list_append((list), (item)))
 
+#define mp_obj_malloc_helper(n, t)          (mp_obj_malloc_helper_dyn(n, t))
+
 static inline mp_obj_t mp_obj_new_str_of_type_dyn(const mp_obj_type_t *type, const byte *data, size_t len) {
     if (type == &mp_type_str) {
         return mp_obj_new_str((const char *)data, len);
@@ -163,6 +165,12 @@ static inline mp_obj_t mp_obj_len_dyn(mp_obj_t o) {
     return mp_fun_table.call_function_n_kw(mp_fun_table.load_name(MP_QSTR_len), 1, &o);
 }
 
+static inline void *mp_obj_malloc_helper_dyn(size_t num_bytes, const mp_obj_type_t *type) {
+    mp_obj_base_t *base = (mp_obj_base_t *)m_malloc(num_bytes);
+    base->type = type;
+    return base;
+}
+
 /******************************************************************************/
 // General runtime functions