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bpo-31784: Implement PEP 564: add time.time_ns() (#3989)

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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
This commit is contained in:
Victor Stinner 2017-11-02 07:28:27 -07:00 • committed by GitHub
parent e314853d57
commit c29b585fd4
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9 changed files with 593 additions and 175 deletions
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20
Include/pytime.h
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@ -85,7 +85,11 @@ PyAPI_FUNC(_PyTime_t) _PyTime_FromSeconds(int seconds);
((_PyTime_t)(seconds) * (1000 * 1000 * 1000))
/* Create a timestamp from a number of nanoseconds. */
PyAPI_FUNC(_PyTime_t) _PyTime_FromNanoseconds(long long ns);
PyAPI_FUNC(_PyTime_t) _PyTime_FromNanoseconds(_PyTime_t ns);
/* Create a timestamp from nanoseconds (Python int). */
PyAPI_FUNC(int) _PyTime_FromNanosecondsObject(_PyTime_t *t,
PyObject *obj);
/* Convert a number of seconds (Python float or int) to a timetamp.
Raise an exception and return -1 on error, return 0 on success. */
@ -114,6 +118,10 @@ PyAPI_FUNC(_PyTime_t) _PyTime_AsMicroseconds(_PyTime_t t,
object. */
PyAPI_FUNC(PyObject *) _PyTime_AsNanosecondsObject(_PyTime_t t);
/* Create a timestamp from a timeval structure.
Raise an exception and return -1 on overflow, return 0 on success. */
PyAPI_FUNC(int) _PyTime_FromTimeval(_PyTime_t *tp, struct timeval *tv);
/* Convert a timestamp to a timeval structure (microsecond resolution).
tv_usec is always positive.
Raise an exception and return -1 if the conversion overflowed,
@ -140,12 +148,22 @@ PyAPI_FUNC(int) _PyTime_AsTimevalTime_t(
_PyTime_round_t round);
#if defined(HAVE_CLOCK_GETTIME) || defined(HAVE_KQUEUE)
/* Create a timestamp from a timespec structure.
Raise an exception and return -1 on overflow, return 0 on success. */
PyAPI_FUNC(int) _PyTime_FromTimespec(_PyTime_t *tp, struct timespec *ts);
/* Convert a timestamp to a timespec structure (nanosecond resolution).
tv_nsec is always positive.
Raise an exception and return -1 on error, return 0 on success. */
PyAPI_FUNC(int) _PyTime_AsTimespec(_PyTime_t t, struct timespec *ts);
#endif
/* Compute ticks * mul / div.
The caller must ensure that ((div - 1) * mul) cannot overflow. */
PyAPI_FUNC(_PyTime_t) _PyTime_MulDiv(_PyTime_t ticks,
_PyTime_t mul,
_PyTime_t div);
/* Get the current time from the system clock.
The function cannot fail. _PyTime_Init() ensures that the system clock