From a9459bc7233e92a6516c3fbc8a18a9d33966e244 Mon Sep 17 00:00:00 2001 From: Paul Sokolovsky Date: Sun, 2 Feb 2014 00:57:06 +0200 Subject: unix: Add basic time module (with time() and clock() functions). Both return int so far (single-precision float doesn't have enough bits to represent int32 precisely). --- unix/time.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 unix/time.c (limited to 'unix/time.c') diff --git a/unix/time.c b/unix/time.c new file mode 100644 index 0000000000..acea69178a --- /dev/null +++ b/unix/time.c @@ -0,0 +1,25 @@ +#include +#include + +#include "misc.h" +#include "mpconfig.h" +#include "qstr.h" +#include "obj.h" +#include "runtime.h" + +static mp_obj_t mod_time_time() { + return mp_obj_new_int((machine_int_t)time(NULL)); +} +static MP_DEFINE_CONST_FUN_OBJ_0(mod_time_time_obj, mod_time_time); + +// Note: this is deprecated since CPy3.3, but pystone still uses it. +static mp_obj_t mod_time_clock() { + return mp_obj_new_int((machine_int_t)clock()); +} +static MP_DEFINE_CONST_FUN_OBJ_0(mod_time_clock_obj, mod_time_clock); + +void time_init() { + mp_obj_t m = mp_obj_new_module(QSTR_FROM_STR_STATIC("time")); + rt_store_attr(m, QSTR_FROM_STR_STATIC("time"), (mp_obj_t)&mod_time_time_obj); + rt_store_attr(m, QSTR_FROM_STR_STATIC("clock"), (mp_obj_t)&mod_time_clock_obj); +} -- cgit v1.2.3 From 6964422cf426164b39abdc66f260be4f582309e0 Mon Sep 17 00:00:00 2001 From: Paul Sokolovsky Date: Sun, 2 Feb 2014 08:56:20 +0200 Subject: unix time.clock(): Actually return float value. --- unix/time.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'unix/time.c') diff --git a/unix/time.c b/unix/time.c index acea69178a..9d8cf497c4 100644 --- a/unix/time.c +++ b/unix/time.c @@ -14,7 +14,12 @@ static MP_DEFINE_CONST_FUN_OBJ_0(mod_time_time_obj, mod_time_time); // Note: this is deprecated since CPy3.3, but pystone still uses it. static mp_obj_t mod_time_clock() { - return mp_obj_new_int((machine_int_t)clock()); +// return mp_obj_new_int((machine_int_t)clock()); + // POSIX requires CLOCKS_PER_SEC equals 1000000, so that's what we assume + // float cannot represent full range of int32 precisely, so we pre-divide + // int to reduce resolution, and then actually do float division hoping + // to preserve integer part resolution. + return mp_obj_new_float((float)(clock() / 1000) / 1000.0); } static MP_DEFINE_CONST_FUN_OBJ_0(mod_time_clock_obj, mod_time_clock); -- cgit v1.2.3