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Merge pull request #2266 from FernandoS27/arbitration

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Kernel: Fixes to Arbitration and SignalProcessWideKey Management
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bunnei 2019-03-28 21:42:24 -04:00 • committed by GitHub
commit f770c17d01
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6 changed files with 22 additions and 14 deletions
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19
src/core/hle/kernel/svc.cpp
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@ -1353,7 +1353,7 @@ static ResultCode WaitProcessWideKeyAtomic(VAddr mutex_addr, VAddr condition_var
current_thread->SetCondVarWaitAddress(condition_variable_addr);
current_thread->SetMutexWaitAddress(mutex_addr);
current_thread->SetWaitHandle(thread_handle);
current_thread->SetStatus(ThreadStatus::WaitMutex);
current_thread->SetStatus(ThreadStatus::WaitCondVar);
current_thread->InvalidateWakeupCallback();
current_thread->WakeAfterDelay(nano_seconds);
@ -1397,10 +1397,10 @@ static ResultCode SignalProcessWideKey(VAddr condition_variable_addr, s32 target
// them all.
std::size_t last = waiting_threads.size();
if (target != -1)
last = target;
last = std::min(waiting_threads.size(), static_cast<std::size_t>(target));
// If there are no threads waiting on this condition variable, just exit
if (last > waiting_threads.size())
if (last == 0)
return RESULT_SUCCESS;
for (std::size_t index = 0; index < last; ++index) {
@ -1408,6 +1408,9 @@ static ResultCode SignalProcessWideKey(VAddr condition_variable_addr, s32 target
ASSERT(thread->GetCondVarWaitAddress() == condition_variable_addr);
// liberate Cond Var Thread.
thread->SetCondVarWaitAddress(0);
std::size_t current_core = Core::System::GetInstance().CurrentCoreIndex();
auto& monitor = Core::System::GetInstance().Monitor();
@ -1426,10 +1429,9 @@ static ResultCode SignalProcessWideKey(VAddr condition_variable_addr, s32 target
}
} while (!monitor.ExclusiveWrite32(current_core, thread->GetMutexWaitAddress(),
thread->GetWaitHandle()));
if (mutex_val == 0) {
// We were able to acquire the mutex, resume this thread.
ASSERT(thread->GetStatus() == ThreadStatus::WaitMutex);
ASSERT(thread->GetStatus() == ThreadStatus::WaitCondVar);
thread->ResumeFromWait();
auto* const lock_owner = thread->GetLockOwner();
@ -1439,8 +1441,8 @@ static ResultCode SignalProcessWideKey(VAddr condition_variable_addr, s32 target
thread->SetLockOwner(nullptr);
thread->SetMutexWaitAddress(0);
thread->SetCondVarWaitAddress(0);
thread->SetWaitHandle(0);
Core::System::GetInstance().CpuCore(thread->GetProcessorID()).PrepareReschedule();
} else {
// Atomically signal that the mutex now has a waiting thread.
do {
@ -1459,12 +1461,11 @@ static ResultCode SignalProcessWideKey(VAddr condition_variable_addr, s32 target
const auto& handle_table = Core::CurrentProcess()->GetHandleTable();
auto owner = handle_table.Get<Thread>(owner_handle);
ASSERT(owner);
ASSERT(thread->GetStatus() == ThreadStatus::WaitMutex);
ASSERT(thread->GetStatus() == ThreadStatus::WaitCondVar);
thread->InvalidateWakeupCallback();
thread->SetStatus(ThreadStatus::WaitMutex);
owner->AddMutexWaiter(thread);
Core::System::GetInstance().CpuCore(thread->GetProcessorID()).PrepareReschedule();
}
}