[Kernel::WaitSync1] Instant timeout if ns == 0

include/kernel/kernel_types.hpp

@@ -23,6 +23,9 @@ namespace SVCResult {
 
         BadThreadPriority = 0xE0E01BFD,
         PortNameTooLong = 0xE0E0181E,
+
+        // Returned when a thread stops waiting due to timing out
+        Timeout = 0x9401BFE,
 	};
 }
 

src/core/kernel/events.cpp

@@ -103,6 +103,12 @@ void Kernel::waitSynchronization1() {
 	if (!shouldWaitOnObject(object)) {
 		regs[0] = SVCResult::Success;
 	} else {
+		// Timeout is 0, don't bother waiting, instantly timeout
+		if (ns == 0) {
+			regs[0] = SVCResult::Timeout;
+			return;
+		}
+
 		regs[0] = SVCResult::Success;
 
 		auto& t = threads[currentThreadIndex];