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py/objdict: Add mp_const_empty_dict_obj, use it for mp_const_empty_map.

This commit is contained in:
Jim Mussared 2020-10-09 17:10:29 +11:00 committed by Damien George
parent fa12bfc227
commit 880875bea1
3 changed files with 18 additions and 14 deletions
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11
py/map.c
View File

@ -40,17 +40,6 @@
#define DEBUG_printf(...) (void)0
#endif
// Fixed empty map. Useful when need to call kw-receiving functions
// without any keywords from C, etc.
const mp_map_t mp_const_empty_map = {
.all_keys_are_qstrs = 0,
.is_fixed = 1,
.is_ordered = 1,
.used = 0,
.alloc = 0,
.table = NULL,
};
// This table of sizes is used to control the growth of hash tables.
// The first set of sizes are chosen so the allocation fits exactly in a
// 4-word GC block, and it's not so important for these small values to be

9
py/obj.h
View File

@ -422,8 +422,6 @@ typedef enum _mp_map_lookup_kind_t {
MP_MAP_LOOKUP_ADD_IF_NOT_FOUND_OR_REMOVE_IF_FOUND = 3, // only valid for mp_set_lookup
} mp_map_lookup_kind_t;
extern const mp_map_t mp_const_empty_map;
static inline bool mp_map_slot_is_filled(const mp_map_t *map, size_t pos) {
assert(pos < map->alloc);
return (map)->table[pos].key != MP_OBJ_NULL && (map)->table[pos].key != MP_OBJ_SENTINEL;
@ -685,17 +683,22 @@ extern const struct _mp_obj_bool_t mp_const_false_obj;
extern const struct _mp_obj_bool_t mp_const_true_obj;
#endif
// Constant objects, globally accessible: b'', (), Ellipsis, NotImplemented, GeneratorExit()
// Constant objects, globally accessible: b'', (), {}, Ellipsis, NotImplemented, GeneratorExit()
// The below macros are for convenience only.
#define mp_const_empty_bytes (MP_OBJ_FROM_PTR(&mp_const_empty_bytes_obj))
#define mp_const_empty_tuple (MP_OBJ_FROM_PTR(&mp_const_empty_tuple_obj))
#define mp_const_notimplemented (MP_OBJ_FROM_PTR(&mp_const_notimplemented_obj))
extern const struct _mp_obj_str_t mp_const_empty_bytes_obj;
extern const struct _mp_obj_tuple_t mp_const_empty_tuple_obj;
extern const struct _mp_obj_dict_t mp_const_empty_dict_obj;
extern const struct _mp_obj_singleton_t mp_const_ellipsis_obj;
extern const struct _mp_obj_singleton_t mp_const_notimplemented_obj;
extern const struct _mp_obj_exception_t mp_const_GeneratorExit_obj;
// Fixed empty map. Useful when calling keyword-receiving functions
// without any keywords from C, etc.
#define mp_const_empty_map (mp_const_empty_dict_obj.map)
// General API for objects
// These macros are derived from more primitive ones and are used to

12
py/objdict.c
View File

@ -33,6 +33,18 @@
#include "py/objtype.h"
#include "py/objstr.h"
const mp_obj_dict_t mp_const_empty_dict_obj = {
.base = { .type = &mp_type_dict },
.map = {
.all_keys_are_qstrs = 0,
.is_fixed = 1,
.is_ordered = 1,
.used = 0,
.alloc = 0,
.table = NULL,
}
};
STATIC mp_obj_t dict_update(size_t n_args, const mp_obj_t *args, mp_map_t *kwargs);
// This is a helper function to iterate through a dictionary. The state of