micropython/py/objclosure.c

74 lines
2.4 KiB
C

#include <string.h>
#include "mpconfig.h"
#include "nlr.h"
#include "misc.h"
#include "qstr.h"
#include "obj.h"
#include "objtuple.h"
#include "runtime.h"
typedef struct _mp_obj_closure_t {
mp_obj_base_t base;
mp_obj_t fun;
machine_uint_t n_closed;
mp_obj_t closed[];
} mp_obj_closure_t;
mp_obj_t closure_call(mp_obj_t self_in, uint n_args, uint n_kw, const mp_obj_t *args) {
mp_obj_closure_t *self = self_in;
// need to concatenate closed-over-vars and args
int n_total = self->n_closed + n_args + 2 * n_kw;
if (n_total <= 5) {
// use stack to allocate temporary args array
mp_obj_t args2[5];
memcpy(args2, self->closed, self->n_closed * sizeof(mp_obj_t));
memcpy(args2 + self->n_closed, args, (n_args + 2 * n_kw) * sizeof(mp_obj_t));
return mp_call_function_n_kw(self->fun, self->n_closed + n_args, n_kw, args2);
} else {
// use heap to allocate temporary args array
mp_obj_t *args2 = m_new(mp_obj_t, n_total);
memcpy(args2, self->closed, self->n_closed * sizeof(mp_obj_t));
memcpy(args2 + self->n_closed, args, (n_args + 2 * n_kw) * sizeof(mp_obj_t));
mp_obj_t res = mp_call_function_n_kw(self->fun, self->n_closed + n_args, n_kw, args2);
m_del(mp_obj_t, args2, n_total);
return res;
}
}
#if MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_DETAILED
STATIC void closure_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t o_in, mp_print_kind_t kind) {
mp_obj_closure_t *o = o_in;
print(env, "<closure %s at %p, n_closed=%u ", mp_obj_fun_get_name(o->fun), o, o->n_closed);
for (int i = 0; i < o->n_closed; i++) {
if (o->closed[i] == MP_OBJ_NULL) {
print(env, "(nil)");
} else {
mp_obj_print_helper(print, env, o->closed[i], PRINT_REPR);
}
print(env, " ");
}
print(env, ">");
}
#endif
const mp_obj_type_t closure_type = {
{ &mp_type_type },
.name = MP_QSTR_closure,
#if MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_DETAILED
.print = closure_print,
#endif
.call = closure_call,
};
mp_obj_t mp_obj_new_closure(mp_obj_t fun, uint n_closed_over, const mp_obj_t *closed) {
mp_obj_closure_t *o = m_new_obj_var(mp_obj_closure_t, mp_obj_t, n_closed_over);
o->base.type = &closure_type;
o->fun = fun;
o->n_closed = n_closed_over;
memcpy(o->closed, closed, n_closed_over * sizeof(mp_obj_t));
return o;
}