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gh-112606: Use pthread_cond_timedwait_relative_np() in parking_lot.c when available (#112616)

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Add a configure define for HAVE_PTHREAD_COND_TIMEDWAIT_RELATIVE_NP and
replaces pthread_cond_timedwait() with pthread_cond_timedwait_relative_np()
for relative time when supported in semaphore waiting logic.
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Matt Prodani 2024-01-30 16:22:17 -05:00 • committed by GitHub
parent fda7445ca5
commit e5e186609f
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4 changed files with 17 additions and 3 deletions
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Python/parking_lot.c
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@ -158,11 +158,15 @@ _PySemaphore_PlatformWait(_PySemaphore *sema, _PyTime_t timeout)
if (sema->counter == 0) {
if (timeout >= 0) {
struct timespec ts;
#if defined(HAVE_PTHREAD_COND_TIMEDWAIT_RELATIVE_NP)
_PyTime_AsTimespec_clamp(timeout, &ts);
err = pthread_cond_timedwait_relative_np(&sema->cond, &sema->mutex, &ts);
#else
_PyTime_t deadline = _PyTime_Add(_PyTime_GetSystemClock(), timeout);
_PyTime_AsTimespec_clamp(deadline, &ts);
err = pthread_cond_timedwait(&sema->cond, &sema->mutex, &ts);
#endif // HAVE_PTHREAD_COND_TIMEDWAIT_RELATIVE_NP
}
else {
err = pthread_cond_wait(&sema->cond, &sema->mutex);