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kernel: User{Event, Timer}: Use atomic access where necessary

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This commit is contained in:
Pawel Dziepak 2013-11-05 20:28:25 +01:00
parent f4b088a992
commit e7dba861fd
2 changed files with 10 additions and 13 deletions
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19
src/system/kernel/UserEvent.cpp
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@ -38,16 +38,13 @@ struct SignalEvent::EventSignal : Signal {
void SetUnused()
{
fInUse = 0;
// mark not-in-use
atomic_set(&fInUse, 0);
}
virtual void Handled()
{
// mark not-in-use
{
InterruptsSpinLocker _(gSchedulerLock);
fInUse = 0;
}
SetUnused();
Signal::Handled();
}
@ -121,11 +118,12 @@ TeamSignalEvent::Fire()
InterruptsSpinLocker locker(gSchedulerLock);
status_t error = send_signal_to_team_locked(fTeam, fSignal->Number(),
fSignal, B_DO_NOT_RESCHEDULE);
locker.Unlock();
// There are situations (for certain signals), in which
// send_signal_to_team_locked() succeeds without queuing the signal.
if (error != B_OK || !fSignal->IsPending())
fSignal->SetUnused();
locker.Unlock();
return error;
}
@ -166,8 +164,6 @@ ThreadSignalEvent::Create(Thread* thread, uint32 signalNumber, int32 signalCode,
status_t
ThreadSignalEvent::Fire()
{
dprintf("THREAD\n");
if (fSignal->MarkUsed())
return B_BUSY;
@ -177,11 +173,12 @@ ThreadSignalEvent::Fire()
InterruptsSpinLocker locker(gSchedulerLock);
status_t error = send_signal_to_thread_locked(fThread, fSignal->Number(),
fSignal, B_DO_NOT_RESCHEDULE);
locker.Unlock();
// There are situations (for certain signals), in which
// send_signal_to_team_locked() succeeds without queuing the signal.
if (error != B_OK || !fSignal->IsPending())
fSignal->SetUnused();
locker.Unlock();
return error;
}
@ -233,7 +230,7 @@ void
CreateThreadEvent::DoDPC(DPCQueue* queue)
{
// We're no longer queued in the DPC queue, so we can be reused.
fPendingDPC = 0;
atomic_set(&fPendingDPC, 0);
// create the thread
thread_id threadID = thread_create_thread(fCreationAttributes, false);

4
src/system/kernel/UserTimer.cpp
View File

@ -287,9 +287,9 @@ UserTimer::CancelTimer()
{
ASSERT(fScheduled);
fSkip = 1;
atomic_set(&fSkip, 1);
cancel_timer(&fTimer);
fSkip = 0;
atomic_set(&fSkip, 0);
}