From 5566c5dff4d6430f704aeb66ca45615cb0df0176 Mon Sep 17 00:00:00 2001
From: Nicolas James <nj3ahxac@gmail.com>
Date: Wed, 8 Apr 2026 14:04:03 +1000
Subject: Reduce thread contention by introducing an atomic time point class -
 greatly reduces locking

---
 src/strategies/low_latency2/swapchain_monitor.hh | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'src/strategies/low_latency2/swapchain_monitor.hh')

diff --git a/src/strategies/low_latency2/swapchain_monitor.hh b/src/strategies/low_latency2/swapchain_monitor.hh
index a5f8362..28771cf 100644
--- a/src/strategies/low_latency2/swapchain_monitor.hh
+++ b/src/strategies/low_latency2/swapchain_monitor.hh
@@ -2,8 +2,10 @@
 #ifndef SWAPCHAIN_MONITOR_HH_
 #define SWAPCHAIN_MONITOR_HH_
 
+#include "atomic_time_point.hh"
 #include "frame_span.hh"
 
+#include <atomic>
 #include <vulkan/vulkan.h>
 
 #include <chrono>
@@ -40,12 +42,11 @@ class SwapchainMonitor final {
     std::mutex mutex{};
     std::chrono::microseconds present_delay{};
     bool was_low_latency_requested{};
+    AtomicTimePoint last_signal_time{};
 
     std::condition_variable_any cv{};
     std::jthread monitor_worker{};
 
-    std::optional<std::chrono::steady_clock::time_point> last_signal_time;
-
     void do_monitor(const std::stop_token stoken);
 
   public:
-- 
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