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py/objgenerator: Eliminate need for mp_obj_gen_wrap wrapper instances.

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For generating functions there is no need to wrap the bytecode function in
a generator wrapper instance.  Instead the type of the bytecode function
can be changed to mp_type_gen_wrap.  This reduces code size and saves a
block of GC heap RAM for each generator.
This commit is contained in:
Damien George 2018-06-29 16:32:58 +10:00
parent 8f86fbfd6c
commit b488a4a848
3 changed files with 7 additions and 20 deletions
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9
py/emitglue.c
View File

@ -146,14 +146,13 @@ mp_obj_t mp_make_function_from_raw_code(const mp_raw_code_t *rc, mp_obj_t def_ar
// rc->kind should always be set and BYTECODE is the only remaining case
assert(rc->kind == MP_CODE_BYTECODE);
fun = mp_obj_new_fun_bc(def_args, def_kw_args, rc->data.u_byte.bytecode, rc->data.u_byte.const_table);
// check for generator functions and if so change the type of the object
if ((rc->scope_flags & MP_SCOPE_FLAG_GENERATOR) != 0) {
((mp_obj_base_t*)MP_OBJ_TO_PTR(fun))->type = &mp_type_gen_wrap;
}
break;
}
// check for generator functions and if so wrap in generator object
if ((rc->scope_flags & MP_SCOPE_FLAG_GENERATOR) != 0) {
fun = mp_obj_new_gen_wrap(fun);
}
return fun;
}

1
py/obj.h
View File

@ -547,6 +547,7 @@ extern const mp_obj_type_t mp_type_slice;
extern const mp_obj_type_t mp_type_zip;
extern const mp_obj_type_t mp_type_array;
extern const mp_obj_type_t mp_type_super;
extern const mp_obj_type_t mp_type_gen_wrap;
extern const mp_obj_type_t mp_type_gen_instance;
extern const mp_obj_type_t mp_type_fun_builtin_0;
extern const mp_obj_type_t mp_type_fun_builtin_1;

17
py/objgenerator.c
View File

@ -37,11 +37,6 @@
/******************************************************************************/
/* generator wrapper */
typedef struct _mp_obj_gen_wrap_t {
mp_obj_base_t base;
mp_obj_t *fun;
} mp_obj_gen_wrap_t;
typedef struct _mp_obj_gen_instance_t {
mp_obj_base_t base;
mp_obj_dict_t *globals;
@ -49,9 +44,8 @@ typedef struct _mp_obj_gen_instance_t {
} mp_obj_gen_instance_t;
STATIC mp_obj_t gen_wrap_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
mp_obj_gen_wrap_t *self = MP_OBJ_TO_PTR(self_in);
mp_obj_fun_bc_t *self_fun = (mp_obj_fun_bc_t*)self->fun;
assert(self_fun->base.type == &mp_type_fun_bc);
// A generating function is just a bytecode function with type mp_type_gen_wrap
mp_obj_fun_bc_t *self_fun = MP_OBJ_TO_PTR(self_in);
// bytecode prelude: get state size and exception stack size
size_t n_state = mp_decode_uint_value(self_fun->bytecode);
@ -76,13 +70,6 @@ const mp_obj_type_t mp_type_gen_wrap = {
.unary_op = mp_generic_unary_op,
};
mp_obj_t mp_obj_new_gen_wrap(mp_obj_t fun) {
mp_obj_gen_wrap_t *o = m_new_obj(mp_obj_gen_wrap_t);
o->base.type = &mp_type_gen_wrap;
o->fun = MP_OBJ_TO_PTR(fun);
return MP_OBJ_FROM_PTR(o);
}
/******************************************************************************/
/* generator instance */