1 files changed, 55 insertions, 0 deletions

diff --git a/src/core/hle/service/time/system_clock_context_update_callback.cpp b/src/core/hle/service/time/system_clock_context_update_callback.cpp
new file mode 100644
index 000000000..5cdb80703
--- /dev/null
+++ b/src/core/hle/service/time/system_clock_context_update_callback.cpp
@@ -0,0 +1,55 @@
+// Copyright 2019 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/kernel/writable_event.h"
+#include "core/hle/service/time/errors.h"
+#include "core/hle/service/time/system_clock_context_update_callback.h"
+
+namespace Service::Time::Clock {
+
+SystemClockContextUpdateCallback::SystemClockContextUpdateCallback() = default;
+SystemClockContextUpdateCallback::~SystemClockContextUpdateCallback() = default;
+
+bool SystemClockContextUpdateCallback::NeedUpdate(const SystemClockContext& value) const {
+    if (has_context) {
+        return context.offset != value.offset ||
+               context.steady_time_point.clock_source_id != value.steady_time_point.clock_source_id;
+    }
+
+    return true;
+}
+
+void SystemClockContextUpdateCallback::RegisterOperationEvent(
+    std::shared_ptr<Kernel::WritableEvent>&& writable_event) {
+    operation_event_list.emplace_back(std::move(writable_event));
+}
+
+void SystemClockContextUpdateCallback::BroadcastOperationEvent() {
+    for (const auto& writable_event : operation_event_list) {
+        writable_event->Signal();
+    }
+}
+
+ResultCode SystemClockContextUpdateCallback::Update(const SystemClockContext& value) {
+    ResultCode result{RESULT_SUCCESS};
+
+    if (NeedUpdate(value)) {
+        context = value;
+        has_context = true;
+
+        result = Update();
+
+        if (result == RESULT_SUCCESS) {
+            BroadcastOperationEvent();
+        }
+    }
+
+    return result;
+}
+
+ResultCode SystemClockContextUpdateCallback::Update() {
+    return RESULT_SUCCESS;
+}
+
+} // namespace Service::Time::Clock