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7 Commits

Author SHA1 Message Date
Victor Stinner 5c5022b862
gh-112567: Add _PyTimeFraction C API (#112568) 
Use a fraction internally in the _PyTime API to reduce the risk of
integer overflow: simplify the fraction using Greatest Common
Divisor (GCD). The fraction API is used by time functions:
perf_counter(), monotonic() and process_time().

For example, QueryPerformanceFrequency() usually returns 10 MHz on
Windows 10 and newer. The fraction SEC_TO_NS / frequency =
1_000_000_000 / 10_000_000 can be simplified to 100 / 1.

* Add _PyTimeFraction type.
* Add functions:

  * _PyTimeFraction_Set()
  * _PyTimeFraction_Mul()
  * _PyTimeFraction_Resolution()

* No longer check "numer * denom <= _PyTime_MAX" in
  _PyTimeFraction_Set(). _PyTimeFraction_Mul() uses _PyTime_Mul()
  which handles integer overflow.
 2023-12-01 19:50:10 +01:00
Victor Stinner 05a370abd6
gh-112567: Add _Py_GetTicksPerSecond() function (#112587) 
* Move _PyRuntimeState.time to _posixstate.ticks_per_second and
  time_module_state.ticks_per_second.
* Add time_module_state.clocks_per_second.
* Rename _PyTime_GetClockWithInfo() to py_clock().
* Rename _PyTime_GetProcessTimeWithInfo() to py_process_time().
* Add process_time_times() helper function, called by
  py_process_time().
* os.times() is now always built: no longer rely on HAVE_TIMES.
 2023-12-01 17:05:56 +01:00
Masaru Tsuchiyama de2a4036cb
gh-108277: Add os.timerfd_create() function (#108382) 
Add wrapper for timerfd_create, timerfd_settime, and timerfd_gettime to os module.

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>
Co-authored-by: Erlend E. Aasland <erlend.aasland@protonmail.com>
Co-authored-by: Victor Stinner <vstinner@python.org>
 2023-10-07 19:33:22 +02:00
Victor Stinner 3f7e93be51
gh-107211: No longer export PyTime internal functions (#108422) 
No longer export these 2 internal C API functions:

* _PyTime_AsNanoseconds()
* _PyTime_GetSystemClockWithInfo()

Change comment style to "// comment" and add comment explaining why
other functions have to be exported.
 2023-08-24 17:17:40 +02:00
Victor Stinner 0d0520af83
gh-107211: No longer export internal functions (3) (#107215) 
No longer export these 14 internal C API functions:

* _PySys_Audit()
* _PySys_SetAttr()
* _PyTraceBack_FromFrame()
* _PyTraceBack_Print_Indented()
* _PyUnicode_FormatAdvancedWriter()
* _PyUnicode_ScanIdentifier()
* _PyWarnings_Init()
* _Py_DumpASCII()
* _Py_DumpDecimal()
* _Py_DumpHexadecimal()
* _Py_DumpTraceback()
* _Py_DumpTracebackThreads()
* _Py_WriteIndent()
* _Py_WriteIndentedMargin()
 2023-07-25 02:25:45 +00:00
Victor Stinner 46d77610fc
gh-106316: Remove pytime.h header file (#106317) 
Remove the "cpython/pytime.h" header file: it only contained private
functions. Move functions to the internal pycore_time.h header file.

Move tests from _testcapi to _testinternalcapi. Rename also test
methods to have the same name than tested C functions.

No longer export these functions:

* _PyTime_Add()
* _PyTime_As100Nanoseconds()
* _PyTime_FromMicrosecondsClamp()
* _PyTime_FromTimespec()
* _PyTime_FromTimeval()
* _PyTime_GetPerfCounterWithInfo()
* _PyTime_MulDiv()
 2023-07-01 22:27:18 +00:00
Eric Snow 8a3f06c54b
gh-81057: Move time Globals to _PyRuntimeState (gh-100122) 
https://github.com/python/cpython/issues/81057
 2022-12-08 16:46:09 -07:00