Commit Graph

111 Commits

Author SHA1 Message Date
Victor Stinner e444752fab
gh-74953: Add _PyTime_FromMicrosecondsClamp() function (#93942) 2022-06-17 16:11:13 +02:00
Victor Stinner 7cdaf87ec5
gh-91731: Replace Py_BUILD_ASSERT() with static_assert() (#91730)
Python 3.11 now uses C11 standard which adds static_assert()
to <assert.h>.

* In pytime.c, replace Py_BUILD_ASSERT() with preprocessor checks on
  SIZEOF_TIME_T with #error.
* On macOS, py_mach_timebase_info() now accepts timebase members with
  the same size than _PyTime_t.
* py_get_monotonic_clock() now saturates GetTickCount64() to
  _PyTime_MAX: GetTickCount64() is unsigned, whereas _PyTime_t is
  signed.
2022-04-20 19:26:40 +02:00
Victor Stinner b556f53785
bpo-46670: Test if a macro is defined, not its value (GH-31178)
* audioop.c: #ifdef WORDS_BIGENDIAN
* ctypes.h: #ifdef USING_MALLOC_CLOSURE_DOT_C
* _ctypes/malloc_closure.c: #ifdef HAVE_FFI_CLOSURE_ALLOC
  and #ifdef USING_APPLE_OS_LIBFFI
* pytime.c: #ifdef __APPLE__
* unicodeobject.c: #ifdef HAVE_NON_UNICODE_WCHAR_T_REPRESENTATION
2022-02-07 01:46:51 +01:00
Victor Stinner 2f92e2a590
bpo-45412: Remove Py_SET_ERRNO_ON_MATH_ERROR() macro (GH-28820)
Remove the following math macros using the errno variable:

* Py_ADJUST_ERANGE1()
* Py_ADJUST_ERANGE2()
* Py_OVERFLOWED()
* Py_SET_ERANGE_IF_OVERFLOW()
* Py_SET_ERRNO_ON_MATH_ERROR()

Create pycore_pymath.h internal header file.

Rename Py_ADJUST_ERANGE1() and Py_ADJUST_ERANGE2() to
_Py_ADJUST_ERANGE1() and _Py_ADJUST_ERANGE2(), and convert these
macros to static inline functions.

Move the following macros to pycore_pymath.h:

* _Py_IntegralTypeSigned()
* _Py_IntegralTypeMax()
* _Py_IntegralTypeMin()
* _Py_InIntegralTypeRange()
2021-10-11 21:00:25 +02:00
Victor Stinner 833fdf126c
bpo-41710: Add private _PyDeadline_Get() function (GH-28674)
Add a private C API for deadlines: add _PyDeadline_Init() and
_PyDeadline_Get() functions.

* Add _PyTime_Add() and _PyTime_Mul() functions which compute t1+t2
  and t1*t2 and clamp the result on overflow.
* _PyTime_MulDiv() now uses _PyTime_Add() and _PyTime_Mul().
2021-10-01 13:29:25 +02:00
Victor Stinner 0231b6da45
bpo-41710: Fix building pytime.c on Windows (GH-28644) 2021-09-30 03:50:29 +02:00
Victor Stinner d62d925823
bpo-41710: Add pytime_add() and pytime_mul() (GH-28642)
Add pytime_add() and pytime_mul() functions to pytime.c to compute
t+t2 and t*k with clamping to [_PyTime_MIN; _PyTime_MAX].

Fix pytime.h: _PyTime_FromTimeval() is not implemented on Windows.
2021-09-30 03:07:11 +02:00
Victor Stinner 09796f2f14
bpo-41710: Add _PyTime_AsTimespec_clamp() (GH-28629)
Add the _PyTime_AsTimespec_clamp() function: similar to
_PyTime_AsTimespec(), but clamp to _PyTime_t min/max and don't raise
an exception.

PyThread_acquire_lock_timed() now uses _PyTime_AsTimespec_clamp() to
remove the Py_UNREACHABLE() code path.

* Add _PyTime_AsTime_t() function.
* Add PY_TIME_T_MIN and PY_TIME_T_MAX constants.
* Replace _PyTime_AsTimeval_noraise() with _PyTime_AsTimeval_clamp().
* Add pytime_divide_round_up() function.
* Fix integer overflow in pytime_divide().
* Add pytime_divmod() function.
2021-09-30 02:11:41 +02:00
Victor Stinner f35ddf2422
bpo-41299: QueryPerformanceFrequency() cannot fail (GH-28552)
py_win_perf_counter_frequency() no longer checks for
QueryPerformanceFrequency() failure. According to the
QueryPerformanceFrequency() documentation, the function can no longer
fails since Windows XP.
2021-09-25 00:31:56 +02:00
Victor Stinner 58f8adfda3
bpo-21302: time.sleep() uses waitable timer on Windows (GH-28483)
On Windows, time.sleep() now uses a waitable timer which has a
resolution of 100 ns (10^-7 sec). Previously, it had a solution of 1
ms (10^-3 sec).

* On Windows, time.sleep() now calls PyErr_CheckSignals() before
  resetting the SIGINT event.
* Add _PyTime_As100Nanoseconds() function.
* Complete and update time.sleep() documentation.

Co-authored-by: Livius <egyszeregy@freemail.hu>
2021-09-22 16:09:30 +02:00
Victor Stinner b49263b698
bpo-21302: Add _PyTime_AsNanoseconds() (GH-28350)
Refactor pytime.c:

* Add pytime_from_nanoseconds() and pytime_as_nanoseconds(),
  and use explicitly these functions
* Add two empty lines between functions
* PEP 7: add braces { ... }
* C99: declare variables where they are set
* Rename private functions to lowercase
* Rename error_time_t_overflow() to pytime_time_t_overflow()
* Rename win_perf_counter_frequency() to py_win_perf_counter_frequency()
* py_get_monotonic_clock(): add an assertion to detect overflow when
  mach_absolute_time() unsigned uint64_t is casted to _PyTime_t
  (signed int64_t).

_testcapi: use _PyTime_FromNanoseconds().
2021-09-15 14:26:43 +02:00
Victor Stinner ae6cd7cfda
bpo-37205: time.time() cannot fail with fatal error (GH-23314)
time.time(), time.perf_counter() and time.monotonic() functions can
no longer fail with a Python fatal error, instead raise a regular
Python exception on failure.

Remove _PyTime_Init(): don't check system, monotonic and perf counter
clocks at startup anymore.

On error, _PyTime_GetSystemClock(), _PyTime_GetMonotonicClock() and
_PyTime_GetPerfCounter() now silently ignore the error and return 0.
They cannot fail with a Python fatal error anymore.

Add py_mach_timebase_info() and win_perf_counter_frequency()
sub-functions.
2020-11-16 16:08:05 +01:00
Victor Stinner 3df5c68487
bpo-37205: time.perf_counter() and time.monotonic() are system-wide (GH-23284)
time.perf_counter() on Windows and time.monotonic() on macOS are now
system-wide. Previously, they used an offset computed at startup to
reduce the precision loss caused by the float type. Use
time.perf_counter_ns() and time.monotonic_ns() added in Python 3.7 to
avoid this precision loss.
2020-11-16 13:21:45 +01:00
Ronald Oussoren 41761933c1
bpo-41100: Support macOS 11 and Apple Silicon (GH-22855)
Co-authored-by:  Lawrence D’Anna <lawrence_danna@apple.com>

* Add support for macOS 11 and Apple Silicon (aka arm64)
   
  As a side effect of this work use the system copy of libffi on macOS, and remove the vendored copy

* Support building on recent versions of macOS while deploying to older versions

  This allows building installers on macOS 11 while still supporting macOS 10.9.
2020-11-08 10:05:27 +01:00
Minmin Gong f660567937
bpo-40650: Include winsock2.h in pytime.c, instead of a full windows.h (GH-20137) 2020-05-18 17:22:53 +01:00
Serhiy Storchaka eebaa9bfc5
bpo-38249: Expand Py_UNREACHABLE() to __builtin_unreachable() in the release mode. (GH-16329)
Co-authored-by: Victor Stinner <vstinner@python.org>
2020-03-09 20:49:52 +02:00
Michael Felt de6f38db48
bpo-39502: Fix 64-bit Python PyTime_localtime() on AIX (GH-18285)
Fix time.localtime() on 64-bit AIX to support years before 1902 and after 2038.
2020-02-07 18:56:16 +01:00
Benjamin Peterson f1c19031fd bpo-38068: Clean up gettimeofday configure logic. (GH-15775)
Assume gettimeofday exists and takes two arguments.
2019-09-10 03:37:59 -07:00
Victor Stinner 8709490f48
bpo-34373: Fix time.mktime() on AIX (GH-12726)
Fix time.mktime() error handling on AIX for year before 1970.

Other changes:

* mktime(): rename variable 'buf' to 'tm'.
* _PyTime_localtime():

  * Use "localtime" rather than "ctime" in the error message
    (specific to AIX).
  * Always initialize errno to 0 just in case if localtime_r()
    doesn't set errno on error.
  * On AIX, avoid abs() which is limited to int type.
  * EINVAL constant is now always available.
2019-04-09 19:12:26 +02:00
Michael Felt e2926b7248 bpo-34373: fix test_mktime and test_pthread_getcpuclickid tests on AIX (GH-8726)
* Fix test_mktime on AIX by adding code to get mktime to behave the
  same way as it does on other *nix systems
* Fix test_pthread_getcpuclickid in AIX by adjusting the test case
  expectations when running on AIX in 32-bit mode

Patch by Michael Felt.
2018-12-28 23:57:37 +10:00
luzpaz a5293b4ff2 Fix miscellaneous typos (#4275) 2017-11-05 15:37:50 +02:00
Victor Stinner c29b585fd4
bpo-31784: Implement PEP 564: add time.time_ns() (#3989)
Add new time functions:

* time.clock_gettime_ns()
* time.clock_settime_ns()
* time.monotonic_ns()
* time.perf_counter_ns()
* time.process_time_ns()
* time.time_ns()

Add new _PyTime functions:

* _PyTime_FromTimespec()
* _PyTime_FromNanosecondsObject()
* _PyTime_FromTimeval()

Other changes:

* Add also os.times() tests to test_os.
* pytime_fromtimeval() and pytime_fromtimeval() now return
  _PyTime_MAX or _PyTime_MIN on overflow, rather than undefined
  behaviour
* _PyTime_FromNanoseconds() parameter type changes from long long to
  _PyTime_t
2017-11-02 07:28:27 -07:00
Pablo Galindo 2c15b29aea bpo-31786: Make functions in the select module blocking when timeout is a small negative value. (#4003) 2017-10-17 17:14:41 +03:00
Victor Stinner bdaeb7d237 bpo-31773: _PyTime_GetPerfCounter() uses _PyTime_t (GH-3983)
* Rewrite win_perf_counter() to only use integers internally.
* Add _PyTime_MulDiv() which compute "ticks * mul / div"
  in two parts (int part and remaining) to prevent integer overflow.
* Clock frequency is checked at initialization for integer overflow.
* Enhance also pymonotonic() to reduce the precision loss on macOS
  (mach_absolute_time() clock).
2017-10-16 08:44:31 -07:00
Victor Stinner cba9a0c6de bpo-31773: time.perf_counter() uses again double (GH-3964)
time.clock() and time.perf_counter() now use again C double
internally.

Remove also _PyTime_GetWinPerfCounterWithInfo(): use
_PyTime_GetPerfCounterDoubleWithInfo() instead on Windows.
2017-10-12 08:51:56 -07:00
Victor Stinner 277c84067f Cleanup pytime.c (#3955)
* Move _PyTime_overflow() at the top
* Move assertion on numerator into _PyTime_ObjectToDenominator()
* PEP 7: add { ... } to if blocks
2017-10-11 08:11:38 -07:00
Victor Stinner a997c7b434 bpo-31415: Add _PyTime_GetPerfCounter() and use it for -X importtime (#3936)
* Add _PyTime_GetPerfCounter()
* Use _PyTime_GetPerfCounter() for -X importtime
2017-10-10 02:51:50 -07:00
Barry Warsaw b2e5794870 bpo-31338 (#3374)
* Add Py_UNREACHABLE() as an alias to abort().
* Use Py_UNREACHABLE() instead of assert(0)
* Convert more unreachable code to use Py_UNREACHABLE()
* Document Py_UNREACHABLE() and a few other macros.
2017-09-14 18:13:16 -07:00
Han Lee 829dacce4f bpo-26669: Fix nan arg value error in pytime.c (#3085)
* Fix #26669

* Modify NaN check function and error message

* Fix pytime.c when arg is nan

* fix whitespace
2017-09-08 16:05:05 -07:00
Benjamin Peterson a853a8ba78 bpo-31373: fix undefined floating-point demotions (#3396) 2017-09-07 11:13:59 -07:00
Antoine Pitrou bcaac8188b Revert "pytime: include winsock2, so we can have a complete timeval type (#3377)" (#3383)
This reverts commit 833860615b, as it broke Windows builds.
2017-09-06 13:31:09 +02:00
Benjamin Peterson 833860615b pytime: include winsock2, so we can have a complete timeval type (#3377) 2017-09-05 20:45:48 -07:00
haney c90e960150 bpo-30183: Fixes HP-UX cc compilation error in pytime.c (#1351)
* bpo-30183: Fixes HP-UX cc compilation error in pytime.c

HP-UX does not support the CLOCK_MONOTONIC identifier, and will fail to
compile:

    "Python/pytime.c", line 723: error #2020: identifier
    "CLOCK_MONOTONIC" is undefined
          const clockid_t clk_id = CLOCK_MONOTONIC;

Add a new section for __hpux that calls 'gethrtime()' instead of
'clock_gettime()'.

* bpo-30183: Removes unnecessary return
2017-06-21 20:18:21 +02:00
Alexander Belopolsky 3e7a3cb903 Issue #28148: Stop using localtime() and gmtime() in the time module.
Introduced platform independent _PyTime_localtime API that is similar
to POSIX localtime_r, but available on all platforms.  Patch by Ed
Schouten.
2016-09-28 17:31:35 -04:00
Benjamin Peterson af580dff4a replace PY_LONG_LONG with long long 2016-09-06 10:46:49 -07:00
Benjamin Peterson ed4aa83ff7 require a long long data type (closes #27961) 2016-09-05 17:44:18 -07:00
Victor Stinner e0a0afdf70 Merge 3.5 (pytime) 2015-11-10 12:11:52 +01:00
Victor Stinner c379ade1bb pytime.c: rename pygettimeofday_new() to pygettimeofday()
I forgot to rename it in my previous refactoring of pytime.c.
2015-11-10 12:11:39 +01:00
Serhiy Storchaka fad85aadb0 Issue #25558: Use compile-time asserts. 2015-11-07 15:42:38 +02:00
Victor Stinner b7a8af20ff Fix _PyTime_AsTimevalStruct_impl() on OpenBSD
On the x86 OpenBSD 5.8 buildbot, the integer overflow check is ignored. Copy
the tv_sec variable into a Py_time_t variable instead of "simply" casting it to
Py_time_t, to fix the integer overflow check.
2015-10-01 08:44:03 +02:00
Victor Stinner c29f399e7e Backout change 28d3bcb1bad6: "Try to fix _PyTime_AsTimevalStruct_impl() on
OpenBSD", I'm not sure that the change was really needed. I read the test
result of an old build because the OpenBSD was 100 builds late.
2015-09-30 22:50:12 +02:00
Victor Stinner 2bfed53b88 Try to fix _PyTime_AsTimevalStruct_impl() on OpenBSD
It looks like the check for integer overflow doesn't work on x86 OpenBSD 5.8.
2015-09-29 13:41:46 +02:00
Victor Stinner ec26f83f2e Issue #25155: Fix _PyTime_Divide() rounding
_PyTime_Divide() rounding was wrong: copy code from Python default which has
now much better unit tests.
2015-09-18 14:21:14 +02:00
Victor Stinner 9a8b177e60 Issue #25155: Add _PyTime_AsTimevalTime_t() function
On Windows, the tv_sec field of the timeval structure has the type C long,
whereas it has the type C time_t on all other platforms. A C long has a size of
32 bits (signed inter, 1 bit for the sign, 31 bits for the value) which is not
enough to store an Epoch timestamp after the year 2038.

Add the _PyTime_AsTimevalTime_t() function written for datetime.datetime.now():
convert a _PyTime_t timestamp to a (secs, us) tuple where secs type is time_t.
It allows to support dates after the year 2038 on Windows.

Enhance also _PyTime_AsTimeval_impl() to detect overflow on the number of
seconds when rounding the number of microseconds.
2015-09-18 13:36:17 +02:00
Victor Stinner 1e2b6882fc Issue #25155: Add _PyTime_AsTimevalTime_t() function
On Windows, the tv_sec field of the timeval structure has the type C long,
whereas it has the type C time_t on all other platforms. A C long has a size of
32 bits (signed inter, 1 bit for the sign, 31 bits for the value) which is not
enough to store an Epoch timestamp after the year 2038.

Add the _PyTime_AsTimevalTime_t() function written for datetime.datetime.now():
convert a _PyTime_t timestamp to a (secs, us) tuple where secs type is time_t.
It allows to support dates after the year 2038 on Windows.

Enhance also _PyTime_AsTimeval_impl() to detect overflow on the number of
seconds when rounding the number of microseconds.
2015-09-18 13:23:02 +02:00
Victor Stinner 51b9398444 pytime: oops, fix typos on Windows 2015-09-10 16:00:06 +02:00
Victor Stinner c60542b12b pytime: add _PyTime_check_mul_overflow() macro to avoid undefined behaviour
Overflow test in test_FromSecondsObject() fails on FreeBSD 10.0 buildbot which
uses clang. clang implements more aggressive optimization which gives
different result than GCC on undefined behaviours.

Check if a multiplication will overflow, instead of checking if a
multiplicatin had overflowed, to avoid undefined behaviour.

Add also debug information if the test on overflow fails.
2015-09-10 15:55:07 +02:00
Victor Stinner ff0ed3e71c New try to fix test_time.test_AsSecondsDouble() on x86 buildbots.
Use volatile keyword in _PyTime_AsSecondsDouble()
2015-09-10 13:25:17 +02:00
Victor Stinner 1efbebaac2 Try to fix test_time.test_AsSecondsDouble() on "x86 Gentoo Non-Debug with X 3.x" buildbot
Use volatile keyword in _PyTime_Round()
2015-09-10 11:48:00 +02:00
Victor Stinner 9c72f9b30a Fix test_time on Windows
* Filter values which would overflow on conversion to the C long type
  (for timeval.tv_sec).
* Adjust also the message of OverflowError on PyTime conversions
* test_time: add debug information if a timestamp conversion fails
2015-09-10 09:10:14 +02:00