lv2: Fix lwmutex locking

rpcs3/Emu/Cell/lv2/sys_lwcond.cpp

@@ -266,7 +266,7 @@ error_code _sys_lwcond_queue_wait(ppu_thread& ppu, u32 lwcond_id, u32 lwmutex_id
 			return cpu;
 		}
 
-		mutex->signaled++;
+		mutex->signaled = 1;
 		return nullptr;
 	});
 

rpcs3/Emu/Cell/lv2/sys_lwmutex.cpp

@@ -75,22 +75,16 @@ error_code _sys_lwmutex_lock(ppu_thread& ppu, u32 lwmutex_id, u64 timeout)
 
 	const auto mutex = idm::get<lv2_obj, lv2_lwmutex>(lwmutex_id, [&](lv2_lwmutex& mutex)
 	{
-		if (u32 value = mutex.signaled)
+		if (mutex.signaled.try_dec())
 		{
-			if (mutex.signaled.compare_and_swap_test(value, value - 1))
+			return true;
-			{
-				return true;
-			}
 		}
 
 		std::lock_guard lock(mutex.mutex);
 
-		if (u32 value = mutex.signaled)
+		if (mutex.signaled.try_dec())
 		{
-			if (mutex.signaled.compare_and_swap_test(value, value - 1))
+			return true;
-			{
-				return true;
-			}
 		}
 
 		mutex.sq.emplace_back(&ppu);
@@ -152,15 +146,7 @@ error_code _sys_lwmutex_trylock(u32 lwmutex_id)
 
 	const auto mutex = idm::check<lv2_obj, lv2_lwmutex>(lwmutex_id, [&](lv2_lwmutex& mutex)
 	{
-		if (u32 value = mutex.signaled)
+		return mutex.signaled.try_dec();
-		{
-			if (mutex.signaled.compare_and_swap_test(value, value - 1))
-			{
-				return true;
-			}
-		}
-
-		return false;
 	});
 
 	if (!mutex)
@@ -189,7 +175,7 @@ error_code _sys_lwmutex_unlock(ppu_thread& ppu, u32 lwmutex_id)
 			return cpu;
 		}
 
-		mutex.signaled++;
+		mutex.signaled = 1;
 		return nullptr;
 	});