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unix/modtime: Implement ticks_ms(), ticks_us() and ticks_diff().

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All of these functions return positive small int, thus range is 2 bits less
than word size (30 bit on 32-bit systems, 62 bit on 64-bit systems).
This commit is contained in:
Paul Sokolovsky 2015-10-17 15:53:55 +03:00
parent fd379db286
commit 8ee153f234
3 changed files with 34 additions and 0 deletions
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4
py/smallint.h
View File

@ -36,11 +36,15 @@
#define MP_SMALL_INT_MIN ((mp_int_t)(((mp_int_t)WORD_MSBIT_HIGH) >> 1))
#define MP_SMALL_INT_FITS(n) ((((n) ^ ((n) << 1)) & WORD_MSBIT_HIGH) == 0)
// Mask to truncate mp_int_t to positive value
#define MP_SMALL_INT_POSITIVE_MASK ~(WORD_MSBIT_HIGH | (WORD_MSBIT_HIGH >> 1))
#elif MICROPY_OBJ_REPR == MICROPY_OBJ_REPR_B
#define MP_SMALL_INT_MIN ((mp_int_t)(((mp_int_t)WORD_MSBIT_HIGH) >> 2))
#define MP_SMALL_INT_FITS(n) ((((n) & MP_SMALL_INT_MIN) == 0) || (((n) & MP_SMALL_INT_MIN) == MP_SMALL_INT_MIN))
// Mask to truncate mp_int_t to positive value
#define MP_SMALL_INT_POSITIVE_MASK ~(WORD_MSBIT_HIGH | (WORD_MSBIT_HIGH >> 1) | (WORD_MSBIT_HIGH >> 2))
#endif

27
unix/modtime.c
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@ -31,6 +31,7 @@
#include <math.h>
#include "py/runtime.h"
#include "py/smallint.h"
#ifdef _WIN32
void msec_sleep_tv(struct timeval *tv) {
@ -69,6 +70,29 @@ STATIC mp_obj_t mod_time_time(void) {
}
STATIC MP_DEFINE_CONST_FUN_OBJ_0(mod_time_time_obj, mod_time_time);
STATIC mp_obj_t mod_time_ticks_us(void) {
struct timeval tv;
gettimeofday(&tv, NULL);
mp_uint_t us = tv.tv_sec * 1000000 + tv.tv_usec;
return MP_OBJ_NEW_SMALL_INT(us & MP_SMALL_INT_POSITIVE_MASK);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_0(mod_time_ticks_us_obj, mod_time_ticks_us);
STATIC mp_obj_t mod_time_ticks_ms(void) {
struct timeval tv;
gettimeofday(&tv, NULL);
mp_uint_t ms = tv.tv_sec * 1000 + tv.tv_usec / 1000;
return MP_OBJ_NEW_SMALL_INT(ms & MP_SMALL_INT_POSITIVE_MASK);
}
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
@ -116,6 +140,9 @@ STATIC const mp_map_elem_t mp_module_time_globals_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR_sleep_ms), (mp_obj_t)&mod_time_sleep_ms_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_sleep_us), (mp_obj_t)&mod_time_sleep_us_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_time), (mp_obj_t)&mod_time_time_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_ticks_ms), (mp_obj_t)&mod_time_ticks_ms_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_ticks_us), (mp_obj_t)&mod_time_ticks_us_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_ticks_diff), (mp_obj_t)&mod_time_ticks_diff_obj },
};
STATIC MP_DEFINE_CONST_DICT(mp_module_time_globals, mp_module_time_globals_table);

3
unix/qstrdefsport.h
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@ -62,6 +62,9 @@ Q(clock)
Q(sleep)
Q(sleep_ms)
Q(sleep_us)
Q(ticks_ms)
Q(ticks_us)
Q(ticks_diff)
Q(socket)
Q(sockaddr_in)