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Issue #22117: Add a new _PyTime_FromSeconds() function

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Fix also _Py_InitializeEx_Private(): initialize time before initializing
import, import_init() uses the _PyTime API (for thread locks).
This commit is contained in:
Victor Stinner 2015-04-03 13:10:54 +02:00
parent 21dfffa218
commit 13019fdef3
6 changed files with 45 additions and 5 deletions
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17
Python/pytime.c
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@ -158,6 +158,19 @@ _PyTime_overflow(void)
"timestamp too large to convert to C _PyTime_t");
}
_PyTime_t
_PyTime_FromSeconds(int seconds)
{
_PyTime_t t;
/* ensure that integer overflow cannot happen, int type should have 32
bits, whereas _PyTime_t type has at least 64 bits (SEC_TO_MS takes 30
bits). */
assert((seconds >= 0 && seconds <= _PyTime_MAX / SEC_TO_NS)
|| (seconds < 0 && seconds >= _PyTime_MIN / SEC_TO_NS));
t = (_PyTime_t)seconds * SEC_TO_NS;
return t;
}
_PyTime_t
_PyTime_FromNanoseconds(PY_LONG_LONG ns)
{
@ -657,5 +670,9 @@ _PyTime_Init(void)
/* ensure that the operating system provides a monotonic clock */
if (_PyTime_GetMonotonicClockWithInfo(&t, NULL) < 0)
return -1;
/* check that _PyTime_FromSeconds() cannot overflow */
assert(INT_MAX <= _PyTime_MAX / SEC_TO_NS);
assert(INT_MIN >= _PyTime_MIN / SEC_TO_NS);
return 0;
}