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extmod/moduos_dupterm: Reuse dupterm_arr_obj for write operations.

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Instead of allocating new array object header again and again, causing
memory fragmentation.
This commit is contained in:
Paul Sokolovsky 2016-07-07 02:16:24 +03:00
parent ec7fe92531
commit a4c8a1ffe8
1 changed files with 10 additions and 1 deletions
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11
extmod/moduos_dupterm.c
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@ -31,6 +31,7 @@
#include "py/nlr.h"
#include "py/runtime.h"
#include "py/objtuple.h"
#include "py/objarray.h"
#include "py/stream.h"
#if MICROPY_PY_OS_DUPTERM
@ -51,8 +52,16 @@ void mp_uos_dupterm_tx_strn(const char *str, size_t len) {
if (nlr_push(&nlr) == 0) {
mp_obj_t write_m[3];
mp_load_method(MP_STATE_PORT(term_obj), MP_QSTR_write, write_m);
write_m[2] = mp_obj_new_bytearray_by_ref(len, (char*)str);
mp_obj_array_t *arr = MP_OBJ_TO_PTR(MP_STATE_PORT(dupterm_arr_obj));
void *org_items = arr->items;
arr->items = (void*)str;
arr->len = len;
write_m[2] = MP_STATE_PORT(dupterm_arr_obj);
mp_call_method_n_kw(1, 0, write_m);
arr = MP_OBJ_TO_PTR(MP_STATE_PORT(dupterm_arr_obj));
arr->items = org_items;
arr->len = 1;
nlr_pop();
} else {
mp_uos_deactivate("dupterm: Exception in write() method, deactivating: ", nlr.ret_val);