unix/modtime: Use ticks_diff() implementation from extmod/utime_mphal.c.

unix/modtime.c

@@ -37,6 +37,7 @@
 #include "py/runtime.h"
 #include "py/smallint.h"
 #include "py/mphal.h"
+#include "extmod/utime_mphal.h"
 
 #ifdef _WIN32
 static inline int msec_sleep_tv(struct timeval *tv) {
@@ -92,13 +93,6 @@ STATIC mp_obj_t mod_time_ticks_ms(void) {
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_0(mod_time_ticks_ms_obj, mod_time_ticks_ms);
 
-STATIC mp_obj_t mod_time_ticks_diff(mp_obj_t oldval, mp_obj_t newval) {
-    mp_uint_t old = MP_OBJ_SMALL_INT_VALUE(oldval);
-    mp_uint_t new = MP_OBJ_SMALL_INT_VALUE(newval);
-    return MP_OBJ_NEW_SMALL_INT((new - old) & MP_SMALL_INT_POSITIVE_MASK);
-}
-STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_time_ticks_diff_obj, mod_time_ticks_diff);
-
 // Note: this is deprecated since CPy3.3, but pystone still uses it.
 STATIC mp_obj_t mod_time_clock(void) {
 #if MICROPY_PY_BUILTINS_FLOAT
@@ -190,7 +184,7 @@ STATIC const mp_rom_map_elem_t mp_module_time_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_time), MP_ROM_PTR(&mod_time_time_obj) },
     { MP_ROM_QSTR(MP_QSTR_ticks_ms), MP_ROM_PTR(&mod_time_ticks_ms_obj) },
     { MP_ROM_QSTR(MP_QSTR_ticks_us), MP_ROM_PTR(&mod_time_ticks_us_obj) },
-    { MP_ROM_QSTR(MP_QSTR_ticks_diff), MP_ROM_PTR(&mod_time_ticks_diff_obj) },
+    { MP_ROM_QSTR(MP_QSTR_ticks_diff), MP_ROM_PTR(&mp_utime_ticks_diff_obj) },
     { MP_ROM_QSTR(MP_QSTR_strftime), MP_ROM_PTR(&mod_time_strftime_obj) },
 };
 

unix/mpconfigport.h

@@ -106,6 +106,7 @@
 
 #define MICROPY_PY_OS_STATVFS       (1)
 #define MICROPY_PY_UTIME            (1)
+#define MICROPY_PY_UTIME_MP_HAL     (1)
 #define MICROPY_PY_UERRNO           (1)
 #define MICROPY_PY_UCTYPES          (1)
 #define MICROPY_PY_UZLIB            (1)