114 lines
4.1 KiB
C
114 lines
4.1 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <string.h>
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#include "py/obj.h"
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#include "py/runtime.h"
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typedef struct _mp_obj_closure_t {
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mp_obj_base_t base;
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mp_obj_t fun;
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size_t n_closed;
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mp_obj_t closed[];
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} mp_obj_closure_t;
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STATIC mp_obj_t closure_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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mp_obj_closure_t *self = MP_OBJ_TO_PTR(self_in);
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// need to concatenate closed-over-vars and args
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size_t n_total = self->n_closed + n_args + 2 * n_kw;
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if (n_total <= 5) {
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// use stack to allocate temporary args array
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mp_obj_t args2[5];
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memcpy(args2, self->closed, self->n_closed * sizeof(mp_obj_t));
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memcpy(args2 + self->n_closed, args, (n_args + 2 * n_kw) * sizeof(mp_obj_t));
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return mp_call_function_n_kw(self->fun, self->n_closed + n_args, n_kw, args2);
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} else {
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// use heap to allocate temporary args array
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mp_obj_t *args2 = m_new(mp_obj_t, n_total);
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memcpy(args2, self->closed, self->n_closed * sizeof(mp_obj_t));
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memcpy(args2 + self->n_closed, args, (n_args + 2 * n_kw) * sizeof(mp_obj_t));
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mp_obj_t res = mp_call_function_n_kw(self->fun, self->n_closed + n_args, n_kw, args2);
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m_del(mp_obj_t, args2, n_total);
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return res;
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}
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}
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#if MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_DETAILED
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STATIC void closure_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) {
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(void)kind;
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mp_obj_closure_t *o = MP_OBJ_TO_PTR(o_in);
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mp_print_str(print, "<closure ");
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mp_obj_print_helper(print, o->fun, PRINT_REPR);
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mp_printf(print, " at %p, n_closed=%u ", o, (int)o->n_closed);
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for (size_t i = 0; i < o->n_closed; i++) {
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if (o->closed[i] == MP_OBJ_NULL) {
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mp_print_str(print, "(nil)");
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} else {
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mp_obj_print_helper(print, o->closed[i], PRINT_REPR);
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}
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mp_print_str(print, " ");
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}
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mp_print_str(print, ">");
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}
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#endif
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#if MICROPY_PY_FUNCTION_ATTRS
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STATIC void mp_obj_closure_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
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// forward to self_in->fun
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mp_obj_closure_t *o = MP_OBJ_TO_PTR(self_in);
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mp_load_method_maybe(o->fun, attr, dest);
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}
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#define CLOSURE_TYPE_ATTR attr, mp_obj_closure_attr,
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#else
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#define CLOSURE_TYPE_ATTR
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#endif
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#if MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_DETAILED
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#define CLOSURE_TYPE_PRINT print, closure_print,
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#else
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#define CLOSURE_TYPE_PRINT
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#endif
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MP_DEFINE_CONST_OBJ_TYPE(
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mp_type_closure,
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MP_QSTR_closure,
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MP_TYPE_FLAG_BINDS_SELF,
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CLOSURE_TYPE_ATTR
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CLOSURE_TYPE_PRINT
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call, closure_call
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);
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mp_obj_t mp_obj_new_closure(mp_obj_t fun, size_t n_closed_over, const mp_obj_t *closed) {
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mp_obj_closure_t *o = mp_obj_malloc_var(mp_obj_closure_t, mp_obj_t, n_closed_over, &mp_type_closure);
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o->fun = fun;
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o->n_closed = n_closed_over;
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memcpy(o->closed, closed, n_closed_over * sizeof(mp_obj_t));
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return MP_OBJ_FROM_PTR(o);
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}
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