Core/HostTiming: Allow events to be advanced manually.

src/common/fiber.cpp

@@ -110,7 +110,7 @@ Fiber::Fiber(std::function<void(void*)>&& entry_point_func, void* start_paramete
                                                           FiberStartFunc);
 }
 
-Fiber::Fiber() : guard{}, entry_point{}, start_parameter{}, previous_fiber{} {
+Fiber::Fiber() {
     impl = std::make_unique<FiberImpl>();
 }
 

src/common/wall_clock.cpp

@@ -42,14 +42,15 @@ public:
 
     u64 GetClockCycles() override {
         std::chrono::nanoseconds time_now = GetTimeNS();
-        const u128 temporal = Common::Multiply64Into128(time_now.count(), emulated_clock_frequency);
-        return Common::Divide128On32(temporal, 1000000000).first;
+        const u128 temporary =
+            Common::Multiply64Into128(time_now.count(), emulated_clock_frequency);
+        return Common::Divide128On32(temporary, 1000000000).first;
     }
 
     u64 GetCPUCycles() override {
         std::chrono::nanoseconds time_now = GetTimeNS();
-        const u128 temporal = Common::Multiply64Into128(time_now.count(), emulated_cpu_frequency);
-        return Common::Divide128On32(temporal, 1000000000).first;
+        const u128 temporary = Common::Multiply64Into128(time_now.count(), emulated_cpu_frequency);
+        return Common::Divide128On32(temporary, 1000000000).first;
     }
 
 private:

src/core/host_timing.cpp

@@ -42,7 +42,7 @@ CoreTiming::CoreTiming() {
 CoreTiming::~CoreTiming() = default;
 
 void CoreTiming::ThreadEntry(CoreTiming& instance) {
-    instance.Advance();
+    instance.ThreadLoop();
 }
 
 void CoreTiming::Initialize() {
@@ -137,11 +137,8 @@ void CoreTiming::RemoveEvent(const std::shared_ptr<EventType>& event_type) {
     basic_lock.unlock();
 }
 
-void CoreTiming::Advance() {
-    has_started = true;
-    while (!shutting_down) {
-        while (!paused) {
-            paused_set = false;
+std::optional<u64> CoreTiming::Advance() {
+    advance_lock.lock();
     basic_lock.lock();
     global_timer = GetGlobalTimeNs().count();
 
@@ -159,16 +156,30 @@ void CoreTiming::Advance() {
     }
 
     if (!event_queue.empty()) {
-                std::chrono::nanoseconds next_time =
-                    std::chrono::nanoseconds(event_queue.front().time - global_timer);
+        const u64 next_time = event_queue.front().time - global_timer;
         basic_lock.unlock();
-                event.WaitFor(next_time);
+        advance_lock.unlock();
+        return next_time;
     } else {
         basic_lock.unlock();
+        advance_lock.unlock();
+        return std::nullopt;
+    }
+}
+
+void CoreTiming::ThreadLoop() {
+    has_started = true;
+    while (!shutting_down) {
+        while (!paused) {
+            paused_set = false;
+            const auto next_time = Advance();
+            if (next_time) {
+                std::chrono::nanoseconds next_time_ns = std::chrono::nanoseconds(*next_time);
+                event.WaitFor(next_time_ns);
+            } else {
                 wait_set = true;
                 event.Wait();
             }
-
             wait_set = false;
         }
         paused_set = true;

src/core/host_timing.h

@@ -103,6 +103,9 @@ public:
     /// Returns current time in nanoseconds.
     std::chrono::nanoseconds GetGlobalTimeNs() const;
 
+    /// Checks for events manually and returns time in nanoseconds for next event, threadsafe.
+    std::optional<u64> Advance();
+
 private:
     struct Event;
 
@@ -110,7 +113,7 @@ private:
     void ClearPendingEvents();
 
     static void ThreadEntry(CoreTiming& instance);
-    void Advance();
+    void ThreadLoop();
 
     std::unique_ptr<Common::WallClock> clock;
 
@@ -128,6 +131,7 @@ private:
     std::shared_ptr<EventType> ev_lost;
     Common::Event event{};
     Common::SpinLock basic_lock{};
+    Common::SpinLock advance_lock{};
     std::unique_ptr<std::thread> timer_thread;
     std::atomic<bool> paused{};
     std::atomic<bool> paused_set{};