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bpo-31786: Make functions in the select module blocking when timeout is a small negative value. (#4003)

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Pablo Galindo 2017-10-17 15:14:41 +01:00 • committed by Serhiy Storchaka
parent 552be9d7e6
commit 2c15b29aea
7 changed files with 65 additions and 12 deletions
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13
Include/pytime.h
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@ -29,9 +29,20 @@ typedef enum {
_PyTime_ROUND_CEILING=1,
/* Round to nearest with ties going to nearest even integer.
For example, used to round from a Python float. */
_PyTime_ROUND_HALF_EVEN
_PyTime_ROUND_HALF_EVEN=2,
/* Round away from zero
For example, used for timeout. _PyTime_ROUND_CEILING rounds
-1e-9 to 0 milliseconds which causes bpo-31786 issue.
_PyTime_ROUND_UP rounds -1e-9 to -1 millisecond which keeps
the timeout sign as expected. select.poll(timeout) must block
for negative values." */
_PyTime_ROUND_UP=3,
/* _PyTime_ROUND_TIMEOUT (an alias for _PyTime_ROUND_UP) should be
used for timeouts. */
_PyTime_ROUND_TIMEOUT = _PyTime_ROUND_UP
} _PyTime_round_t;
/* Convert a time_t to a PyLong. */
PyAPI_FUNC(PyObject *) _PyLong_FromTime_t(
time_t sec);