From dd5f2316dbf3271cdc9431ec7b2f278f2f00cb1c Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Fri, 7 Nov 2025 21:37:38 +0000
Subject: [PATCH 1/4] Initial plan


From c36489729b652ffe17f90f0d2d3d8377c124a039 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Fri, 7 Nov 2025 21:50:04 +0000
Subject: [PATCH 2/4] Add thread-safety protections to Truthiness algorithm

Co-authored-by: wdconinc <4656391+wdconinc@users.noreply.github.com>
---
 src/algorithms/reco/Truthiness.cc |  7 +++++--
 src/algorithms/reco/Truthiness.h  | 12 +++++++++---
 2 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/src/algorithms/reco/Truthiness.cc b/src/algorithms/reco/Truthiness.cc
index e479159c5c..45fb4447e1 100644
--- a/src/algorithms/reco/Truthiness.cc
+++ b/src/algorithms/reco/Truthiness.cc
@@ -136,8 +136,11 @@ void Truthiness::process(const Truthiness::Input& input,
 
   // Update statistics using online updating formula
   // avg_n = avg_(n-1) + (x_n - avg_(n-1)) / n
-  m_event_count++;
-  m_average_truthiness += (truthiness - m_average_truthiness) / m_event_count;
+  {
+    std::lock_guard<std::mutex> lock(m_stats_mutex);
+    m_event_count++;
+    m_average_truthiness += (truthiness - m_average_truthiness) / m_event_count;
+  }
 
   // Report final truthiness
   debug("Event truthiness: {:.6f} (from {} associations, {} unassociated MC, {} unassociated RC)",
diff --git a/src/algorithms/reco/Truthiness.h b/src/algorithms/reco/Truthiness.h
index f842c76556..64839582fd 100644
--- a/src/algorithms/reco/Truthiness.h
+++ b/src/algorithms/reco/Truthiness.h
@@ -7,6 +7,8 @@
 #include <edm4eic/MCRecoParticleAssociationCollection.h>
 #include <edm4eic/ReconstructedParticleCollection.h>
 #include <edm4hep/MCParticleCollection.h>
+#include <atomic>
+#include <mutex>
 #include <stdint.h>
 #include <string>
 #include <string_view>
@@ -35,7 +37,8 @@ class Truthiness : public TruthinessAlgorithm, public WithPodConfig<TruthinessCo
 
 private:
   mutable double m_average_truthiness{0.0};
-  mutable uint64_t m_event_count{0};
+  mutable std::atomic<uint64_t> m_event_count{0};
+  mutable std::mutex m_stats_mutex;
 
 public:
   Truthiness(std::string_view name)
@@ -55,8 +58,11 @@ class Truthiness : public TruthinessAlgorithm, public WithPodConfig<TruthinessCo
   void process(const Input&, const Output&) const final;
 
   // Accessors for statistics
-  double getAverageTruthiness() const { return m_average_truthiness; }
-  uint64_t getEventCount() const { return m_event_count; }
+  double getAverageTruthiness() const {
+    std::lock_guard<std::mutex> lock(m_stats_mutex);
+    return m_average_truthiness;
+  }
+  uint64_t getEventCount() const { return m_event_count.load(); }
 };
 
 } // namespace eicrecon

From 3ac170d3930a9970fa5eca28f8dbfcdb185b73da Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Fri, 7 Nov 2025 21:51:46 +0000
Subject: [PATCH 3/4] Complete thread-safety improvements

Co-authored-by: wdconinc <4656391+wdconinc@users.noreply.github.com>
---
 _codeql_detected_source_root | 1 +
 1 file changed, 1 insertion(+)
 create mode 120000 _codeql_detected_source_root

diff --git a/_codeql_detected_source_root b/_codeql_detected_source_root
new file mode 120000
index 0000000000..945c9b46d6
--- /dev/null
+++ b/_codeql_detected_source_root
@@ -0,0 +1 @@
+.
\ No newline at end of file

From aa0f84d614145f4b34dc789b1fc4b649d6113ee2 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Fri, 7 Nov 2025 21:52:07 +0000
Subject: [PATCH 4/4] Remove temporary codeql artifact

Co-authored-by: wdconinc <4656391+wdconinc@users.noreply.github.com>
---
 _codeql_detected_source_root | 1 -
 1 file changed, 1 deletion(-)
 delete mode 120000 _codeql_detected_source_root

diff --git a/_codeql_detected_source_root b/_codeql_detected_source_root
deleted file mode 120000
index 945c9b46d6..0000000000
--- a/_codeql_detected_source_root
+++ /dev/null
@@ -1 +0,0 @@
-.
\ No newline at end of file