HostTiming: Pause the hardware clock on pause.

src/core/core.cpp

@@ -137,8 +137,8 @@ struct System::Impl {
     ResultStatus Pause() {
         status = ResultStatus::Success;
 
-        kernel.Suspend(true);
         core_timing.SyncPause(true);
+        kernel.Suspend(true);
         cpu_manager.Pause(true);
 
         return status;

src/core/core_timing.cpp

@@ -77,6 +77,9 @@ void CoreTiming::SyncPause(bool is_paused) {
         return;
     }
     Pause(is_paused);
+    if (!is_paused) {
+        pause_event.Set();
+    }
     event.Set();
     while (paused_set != is_paused)
         ;
@@ -197,6 +200,9 @@ void CoreTiming::ThreadLoop() {
             wait_set = false;
         }
         paused_set = true;
+        clock->Pause(true);
+        pause_event.Wait();
+        clock->Pause(false);
     }
 }
 

src/core/core_timing.h

@@ -136,6 +136,7 @@ private:
 
     std::shared_ptr<EventType> ev_lost;
     Common::Event event{};
+    Common::Event pause_event{};
     Common::SpinLock basic_lock{};
     Common::SpinLock advance_lock{};
     std::unique_ptr<std::thread> timer_thread;