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SVC: Correct SignalEvent, ClearEvent, ResetSignal, WaitSynchronization, CancelSynchronization, ArbitrateLock

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This commit is contained in:
Fernando Sahmkow 2020-02-25 16:38:33 -04:00
parent ef4afa9760
commit 3b5b950c89
8 changed files with 136 additions and 92 deletions
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71
src/core/hle/kernel/mutex.cpp
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@ -72,42 +72,55 @@ ResultCode Mutex::TryAcquire(VAddr address, Handle holding_thread_handle,
return ERR_INVALID_ADDRESS;
}
const auto& handle_table = system.Kernel().CurrentProcess()->GetHandleTable();
auto& kernel = system.Kernel();
std::shared_ptr<Thread> current_thread =
SharedFrom(system.CurrentScheduler().GetCurrentThread());
std::shared_ptr<Thread> holding_thread = handle_table.Get<Thread>(holding_thread_handle);
std::shared_ptr<Thread> requesting_thread = handle_table.Get<Thread>(requesting_thread_handle);
SharedFrom(kernel.CurrentScheduler().GetCurrentThread());
{
SchedulerLock lock(kernel);
// The mutex address must be 4-byte aligned
if ((address % sizeof(u32)) != 0) {
return ERR_INVALID_ADDRESS;
}
// TODO(Subv): It is currently unknown if it is possible to lock a mutex in behalf of another
// thread.
ASSERT(requesting_thread == current_thread);
const auto& handle_table = kernel.CurrentProcess()->GetHandleTable();
std::shared_ptr<Thread> holding_thread = handle_table.Get<Thread>(holding_thread_handle);
std::shared_ptr<Thread> requesting_thread = handle_table.Get<Thread>(requesting_thread_handle);
const u32 addr_value = system.Memory().Read32(address);
// TODO(Subv): It is currently unknown if it is possible to lock a mutex in behalf of another
// thread.
ASSERT(requesting_thread == current_thread);
// If the mutex isn't being held, just return success.
if (addr_value != (holding_thread_handle | Mutex::MutexHasWaitersFlag)) {
return RESULT_SUCCESS;
current_thread->SetSynchronizationResults(nullptr, RESULT_SUCCESS);
const u32 addr_value = system.Memory().Read32(address);
// If the mutex isn't being held, just return success.
if (addr_value != (holding_thread_handle | Mutex::MutexHasWaitersFlag)) {
return RESULT_SUCCESS;
}
if (holding_thread == nullptr) {
return ERR_INVALID_HANDLE;
}
// Wait until the mutex is released
current_thread->SetMutexWaitAddress(address);
current_thread->SetWaitHandle(requesting_thread_handle);
current_thread->SetStatus(ThreadStatus::WaitMutex);
// Update the lock holder thread's priority to prevent priority inversion.
holding_thread->AddMutexWaiter(current_thread);
}
if (holding_thread == nullptr) {
LOG_ERROR(Kernel, "Holding thread does not exist! thread_handle={:08X}",
holding_thread_handle);
return ERR_INVALID_HANDLE;
{
SchedulerLock lock(kernel);
auto* owner = current_thread->GetLockOwner();
if (owner != nullptr) {
owner->RemoveMutexWaiter(current_thread);
}
}
// Wait until the mutex is released
current_thread->SetMutexWaitAddress(address);
current_thread->SetWaitHandle(requesting_thread_handle);
current_thread->SetStatus(ThreadStatus::WaitMutex);
current_thread->InvalidateWakeupCallback();
// Update the lock holder thread's priority to prevent priority inversion.
holding_thread->AddMutexWaiter(current_thread);
system.PrepareReschedule();
return RESULT_SUCCESS;
return current_thread->GetSignalingResult();
}
ResultCode Mutex::Release(VAddr address) {