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py: Add iter_buf to getiter type method.

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Allows to iterate over the following without allocating on the heap:
- tuple
- list
- string, bytes
- bytearray, array
- dict (not dict.keys, dict.values, dict.items)
- set, frozenset

Allows to call the following without heap memory:
- all, any, min, max, sum

TODO: still need to allocate stack memory in bytecode for iter_buf.
This commit is contained in:
Damien George
2016-01-09 23:14:54 +00:00
parent 101886f529
commit ae8d867586
36 changed files with 162 additions and 106 deletions
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3
extmod/modbtree.c
View File

@@ -184,7 +184,8 @@ STATIC mp_obj_t btree_items(size_t n_args, const mp_obj_t *args) {
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(btree_items_obj, 1, 4, btree_items);
STATIC mp_obj_t btree_getiter(mp_obj_t self_in) {
STATIC mp_obj_t btree_getiter(mp_obj_t self_in, mp_obj_iter_buf_t *iter_buf) {
(void)iter_buf;
mp_obj_btree_t *self = MP_OBJ_TO_PTR(self_in);
if (self->next_flags != 0) {
// If we're called immediately after keys(), values(), or items(),

4
extmod/vfs_fat_file.c
View File

@@ -264,7 +264,7 @@ const mp_obj_type_t mp_type_fileio = {
.name = MP_QSTR_FileIO,
.print = file_obj_print,
.make_new = file_obj_make_new,
.getiter = mp_identity,
.getiter = mp_identity_getiter,
.iternext = mp_stream_unbuffered_iter,
.protocol = &fileio_stream_p,
.locals_dict = (mp_obj_dict_t*)&rawfile_locals_dict,
@@ -283,7 +283,7 @@ const mp_obj_type_t mp_type_textio = {
.name = MP_QSTR_TextIOWrapper,
.print = file_obj_print,
.make_new = file_obj_make_new,
.getiter = mp_identity,
.getiter = mp_identity_getiter,
.iternext = mp_stream_unbuffered_iter,
.protocol = &textio_stream_p,
.locals_dict = (mp_obj_dict_t*)&rawfile_locals_dict,