diff options
Diffstat (limited to 'src/core/hle/kernel/svc.cpp')
-rw-r--r-- | src/core/hle/kernel/svc.cpp | 27 |
1 files changed, 9 insertions, 18 deletions
diff --git a/src/core/hle/kernel/svc.cpp b/src/core/hle/kernel/svc.cpp index bd67fc96d..823d1d403 100644 --- a/src/core/hle/kernel/svc.cpp +++ b/src/core/hle/kernel/svc.cpp @@ -1677,18 +1677,20 @@ static ResultCode SignalProcessWideKey(Core::System& system, VAddr condition_var // Atomically read the value of the mutex. u32 mutex_val = 0; + u32 update_val = 0; + const VAddr mutex_address = thread->GetMutexWaitAddress(); do { - monitor.SetExclusive(current_core, thread->GetMutexWaitAddress()); + monitor.SetExclusive(current_core, mutex_address); // If the mutex is not yet acquired, acquire it. - mutex_val = Memory::Read32(thread->GetMutexWaitAddress()); + mutex_val = Memory::Read32(mutex_address); if (mutex_val != 0) { - monitor.ClearExclusive(); - break; + update_val = mutex_val | Mutex::MutexHasWaitersFlag; + } else { + update_val = thread->GetWaitHandle(); } - } while (!monitor.ExclusiveWrite32(current_core, thread->GetMutexWaitAddress(), - thread->GetWaitHandle())); + } while (!monitor.ExclusiveWrite32(current_core, mutex_address, update_val)); if (mutex_val == 0) { // We were able to acquire the mutex, resume this thread. ASSERT(thread->GetStatus() == ThreadStatus::WaitCondVar); @@ -1702,20 +1704,9 @@ static ResultCode SignalProcessWideKey(Core::System& system, VAddr condition_var thread->SetLockOwner(nullptr); thread->SetMutexWaitAddress(0); thread->SetWaitHandle(0); + thread->SetWaitSynchronizationResult(RESULT_SUCCESS); system.PrepareReschedule(thread->GetProcessorID()); } else { - // Atomically signal that the mutex now has a waiting thread. - do { - monitor.SetExclusive(current_core, thread->GetMutexWaitAddress()); - - // Ensure that the mutex value is still what we expect. - u32 value = Memory::Read32(thread->GetMutexWaitAddress()); - // TODO(Subv): When this happens, the kernel just clears the exclusive state and - // retries the initial read for this thread. - ASSERT_MSG(mutex_val == value, "Unhandled synchronization primitive case"); - } while (!monitor.ExclusiveWrite32(current_core, thread->GetMutexWaitAddress(), - mutex_val | Mutex::MutexHasWaitersFlag)); - // The mutex is already owned by some other thread, make this thread wait on it. const Handle owner_handle = static_cast<Handle>(mutex_val & Mutex::MutexOwnerMask); const auto& handle_table = system.Kernel().CurrentProcess()->GetHandleTable(); |