mirror of
https://github.com/yuzu-emu/yuzu.git
synced 2024-12-25 18:30:06 +00:00
SVC: Correct ArbitrateUnlock
This commit is contained in:
parent
3b5b950c89
commit
203e706302
@ -84,10 +84,11 @@ ResultCode Mutex::TryAcquire(VAddr address, Handle holding_thread_handle,
|
||||
|
||||
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);
|
||||
std::shared_ptr<Thread> requesting_thread =
|
||||
handle_table.Get<Thread>(requesting_thread_handle);
|
||||
|
||||
// TODO(Subv): It is currently unknown if it is possible to lock a mutex in behalf of another
|
||||
// thread.
|
||||
// TODO(Subv): It is currently unknown if it is possible to lock a mutex in behalf of
|
||||
// another thread.
|
||||
ASSERT(requesting_thread == current_thread);
|
||||
|
||||
current_thread->SetSynchronizationResults(nullptr, RESULT_SUCCESS);
|
||||
@ -123,47 +124,47 @@ ResultCode Mutex::TryAcquire(VAddr address, Handle holding_thread_handle,
|
||||
return current_thread->GetSignalingResult();
|
||||
}
|
||||
|
||||
ResultCode Mutex::Release(VAddr address) {
|
||||
// The mutex address must be 4-byte aligned
|
||||
if ((address % sizeof(u32)) != 0) {
|
||||
LOG_ERROR(Kernel, "Address is not 4-byte aligned! address={:016X}", address);
|
||||
return ERR_INVALID_ADDRESS;
|
||||
}
|
||||
std::pair<ResultCode, std::shared_ptr<Thread>> Mutex::Unlock(std::shared_ptr<Thread> owner,
|
||||
VAddr address) {
|
||||
// The mutex address must be 4-byte aligned
|
||||
if ((address % sizeof(u32)) != 0) {
|
||||
LOG_ERROR(Kernel, "Address is not 4-byte aligned! address={:016X}", address);
|
||||
return {ERR_INVALID_ADDRESS, nullptr};
|
||||
}
|
||||
|
||||
std::shared_ptr<Thread> current_thread =
|
||||
SharedFrom(system.CurrentScheduler().GetCurrentThread());
|
||||
auto [thread, num_waiters] = GetHighestPriorityMutexWaitingThread(current_thread, address);
|
||||
|
||||
// There are no more threads waiting for the mutex, release it completely.
|
||||
if (thread == nullptr) {
|
||||
auto [new_owner, num_waiters] = GetHighestPriorityMutexWaitingThread(owner, address);
|
||||
if (new_owner == nullptr) {
|
||||
system.Memory().Write32(address, 0);
|
||||
return RESULT_SUCCESS;
|
||||
return {RESULT_SUCCESS, nullptr};
|
||||
}
|
||||
|
||||
// Transfer the ownership of the mutex from the previous owner to the new one.
|
||||
TransferMutexOwnership(address, current_thread, thread);
|
||||
|
||||
u32 mutex_value = thread->GetWaitHandle();
|
||||
|
||||
TransferMutexOwnership(address, owner, new_owner);
|
||||
u32 mutex_value = new_owner->GetWaitHandle();
|
||||
if (num_waiters >= 2) {
|
||||
// Notify the guest that there are still some threads waiting for the mutex
|
||||
mutex_value |= Mutex::MutexHasWaitersFlag;
|
||||
}
|
||||
|
||||
// Grant the mutex to the next waiting thread and resume it.
|
||||
new_owner->SetSynchronizationResults(nullptr, RESULT_SUCCESS);
|
||||
new_owner->ResumeFromWait();
|
||||
new_owner->SetLockOwner(nullptr);
|
||||
system.Memory().Write32(address, mutex_value);
|
||||
|
||||
ASSERT(thread->GetStatus() == ThreadStatus::WaitMutex);
|
||||
thread->ResumeFromWait();
|
||||
|
||||
thread->SetLockOwner(nullptr);
|
||||
thread->SetCondVarWaitAddress(0);
|
||||
thread->SetMutexWaitAddress(0);
|
||||
thread->SetWaitHandle(0);
|
||||
thread->SetWaitSynchronizationResult(RESULT_SUCCESS);
|
||||
|
||||
system.PrepareReschedule();
|
||||
|
||||
return RESULT_SUCCESS;
|
||||
return {RESULT_SUCCESS, new_owner};
|
||||
}
|
||||
|
||||
ResultCode Mutex::Release(VAddr address) {
|
||||
auto& kernel = system.Kernel();
|
||||
SchedulerLock lock(kernel);
|
||||
|
||||
std::shared_ptr<Thread> current_thread =
|
||||
SharedFrom(kernel.CurrentScheduler().GetCurrentThread());
|
||||
|
||||
auto [result, new_owner] = Unlock(current_thread, address);
|
||||
|
||||
if (result != RESULT_SUCCESS && new_owner != nullptr) {
|
||||
new_owner->SetSynchronizationResults(nullptr, result);
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
} // namespace Kernel
|
||||
|
@ -28,6 +28,9 @@ public:
|
||||
ResultCode TryAcquire(VAddr address, Handle holding_thread_handle,
|
||||
Handle requesting_thread_handle);
|
||||
|
||||
/// Unlocks a mutex for owner at address
|
||||
std::pair<ResultCode, std::shared_ptr<Thread>> Unlock(std::shared_ptr<Thread> owner, VAddr address);
|
||||
|
||||
/// Releases the mutex at the specified address.
|
||||
ResultCode Release(VAddr address);
|
||||
|
||||
|
@ -80,7 +80,7 @@ void Thread::CancelWakeupTimer() {
|
||||
|
||||
void Thread::ResumeFromWait() {
|
||||
ASSERT_MSG(wait_objects.empty(), "Thread is waking up while waiting for objects");
|
||||
|
||||
SchedulerLock lock(kernel);
|
||||
switch (status) {
|
||||
case ThreadStatus::Paused:
|
||||
case ThreadStatus::WaitSynch:
|
||||
|
Loading…
Reference in New Issue
Block a user