diff --git a/Utilities/Thread.cpp b/Utilities/Thread.cpp
index b24ad1036f..10970be896 100644
--- a/Utilities/Thread.cpp
+++ b/Utilities/Thread.cpp
@@ -1,4 +1,5 @@
 #include "stdafx.h"
+#include "Emu/System.h"
 #include "Log.h"
 #include "Thread.h"
 
@@ -207,3 +208,66 @@ bool thread::joinable() const
 {
 	return m_thr.joinable();
 }
+
+struct g_waiter_map_t
+{
+	// TODO: optimize (use custom lightweight readers-writer lock)
+
+	std::mutex m_mutex;
+	
+	struct waiter
+	{
+		u64 signal_id;
+		NamedThreadBase* thread;
+	};
+
+	std::vector<waiter> m_waiters;
+
+} g_waiter_map;
+
+bool waiter_is_stopped(const char* func_name, u64 signal_id)
+{
+	if (Emu.IsStopped())
+	{
+		LOG_WARNING(Log::HLE, "%s() aborted (signal_id=0x%llx)", func_name, signal_id);
+		return true;
+	}
+	return false;
+}
+
+void waiter_register(u64 signal_id, NamedThreadBase* thread)
+{
+	std::lock_guard<std::mutex> lock(g_waiter_map.m_mutex);
+
+	// add waiter
+	g_waiter_map.m_waiters.push_back({ signal_id, thread });
+}
+
+void waiter_unregister(u64 signal_id, NamedThreadBase* thread)
+{
+	std::lock_guard<std::mutex> lock(g_waiter_map.m_mutex);
+
+	// remove waiter
+	for (s32 i = g_waiter_map.m_waiters.size() - 1; i >= 0; i--)
+	{
+		if (g_waiter_map.m_waiters[i].signal_id == signal_id && g_waiter_map.m_waiters[i].thread == thread)
+		{
+			g_waiter_map.m_waiters.erase(g_waiter_map.m_waiters.begin() + i);
+			return;
+		}
+	}
+}
+
+void waiter_signal(u64 signal_id)
+{
+	std::lock_guard<std::mutex> lock(g_waiter_map.m_mutex);
+
+	// find waiter and signal
+	for (auto& v : g_waiter_map.m_waiters)
+	{
+		if (v.signal_id == signal_id)
+		{
+			v.thread->Notify();
+		}
+	}
+}
diff --git a/Utilities/Thread.h b/Utilities/Thread.h
index 2566cdf43b..acef1eb77b 100644
--- a/Utilities/Thread.h
+++ b/Utilities/Thread.h
@@ -69,4 +69,32 @@ public:
 	void detach();
 	void join();
 	bool joinable() const;
-};
\ No newline at end of file
+};
+
+// for internal use (checks if Emu is stopped)
+bool waiter_is_stopped(const char* func_name, u64 signal_id);
+// for internal use
+void waiter_register(u64 signal_id, NamedThreadBase* thread);
+// for internal use
+void waiter_unregister(u64 signal_id, NamedThreadBase* thread);
+
+// wait until waiter_func() returns true, signal_id is arbitrary number
+template<typename WT> static __forceinline void waiter_op(const char* func_name, u64 signal_id, const WT waiter_func)
+{
+	if (waiter_func()) return;
+
+	NamedThreadBase* thread = GetCurrentNamedThread();
+	waiter_register(signal_id, thread);
+
+	while (true)
+	{
+		thread->WaitForAnySignal(1);
+		if (waiter_is_stopped(func_name, signal_id)) break;
+		if (waiter_func()) break;
+	}
+
+	waiter_unregister(signal_id, thread);
+}
+
+// signal all threads waiting on waiter_op() with the same signal_id (signaling only hints those threads that corresponding conditions are *probably* met)
+void waiter_signal(u64 signal_id);
diff --git a/rpcs3/Emu/SysCalls/Modules/cellSync.cpp b/rpcs3/Emu/SysCalls/Modules/cellSync.cpp
index df4de7b5a8..5f55d6d0fa 100644
--- a/rpcs3/Emu/SysCalls/Modules/cellSync.cpp
+++ b/rpcs3/Emu/SysCalls/Modules/cellSync.cpp
@@ -60,15 +60,10 @@ s32 cellSyncMutexLock(vm::ptr<CellSyncMutex> mutex)
 	});
 
 	// prx: wait until this old value is equal to m_rel
-	while (order != mutex->data.read_relaxed().m_rel)
+	waiter_op(__FUNCTION__, mutex.addr(), [mutex, order]()
 	{
-		std::this_thread::sleep_for(std::chrono::milliseconds(1)); // hack
-		if (Emu.IsStopped())
-		{
-			cellSync->Warning("cellSyncMutexLock(mutex_addr=0x%x) aborted", mutex.addr());
-			break;
-		}
-	}
+		return order == mutex->data.read_relaxed().m_rel;
+	});
 
 	// prx: sync
 	mutex->data.read_sync();
@@ -116,6 +111,8 @@ s32 cellSyncMutexUnlock(vm::ptr<CellSyncMutex> mutex)
 	{
 		mutex.m_rel++;
 	});
+
+	waiter_signal(mutex.addr());
 	return CELL_OK;
 }