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Kernel: Implement FUTEX_WAKE of arbitrary count.

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Previously we just woke all waiters no matter how many were
requested. Fix this by implementing WaitQueue::wake_n(..).
This commit is contained in:
Brian Gianforcaro 2020-04-25 16:57:12 -07:00 • committed by Andreas Kling
parent e8f6f655bf
commit 1f64e3eb16
3 changed files with 17 additions and 2 deletions
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15
Kernel/WaitQueue.cpp
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@ -55,6 +55,21 @@ void WaitQueue::wake_one(Atomic<bool>* lock)
Scheduler::stop_idling();
}
void WaitQueue::wake_n(i32 wake_count)
{
InterruptDisabler disabler;
if (m_threads.is_empty())
return;
for (i32 i = 0; i < wake_count; ++i) {
Thread* thread = m_threads.take_first();
if (!thread)
break;
thread->wake_from_queue();
}
Scheduler::stop_idling();
}
void WaitQueue::wake_all()
{
InterruptDisabler disabler;