New submission from STINNER Victor:
The current code of PyThread_acquire_lock_timed() (the implementation not using
semaphore) doesn't compute correctly the timeout when pthread_cond_timedwait()
is interrupted by a signal. We should recompute the timeout using a deadline.
Something like select.select():
if (tvp)
deadline = _PyTime_GetMonotonicClock() + timeout;
do {
... use tvp
if (errno != EINTR)
break;
/* select() was interrupted by a signal */
if (PyErr_CheckSignals())
goto finally;
if (tvp) {
timeout = deadline - _PyTime_GetMonotonicClock();
if (timeout < 0) {
n = 0;
break;
}
_PyTime_AsTimeval_noraise(timeout, &tv, _PyTime_ROUND_CEILING);
/* retry select() with the recomputed timeout */
}
} while (1);
----------
messages: 296896
nosy: haypo, neologix, pitrou
priority: normal
severity: normal
status: open
title: PyThread_acquire_lock_timed() should recompute the timeout when
interrupted by a signal
versions: Python 3.7
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Python tracker <[email protected]>
<http://bugs.python.org/issue30768>
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