1 files changed, 61 insertions, 0 deletions
diff --git a/src/buildtool/common/statistics.hpp b/src/buildtool/common/statistics.hpp
new file mode 100644
index 00000000..a7b89791
--- /dev/null
+++ b/src/buildtool/common/statistics.hpp
@@ -0,0 +1,61 @@
+#ifndef INCLUDED_SRC_BUILDTOOL_COMMON_STATISTICS_HPP
+#define INCLUDED_SRC_BUILDTOOL_COMMON_STATISTICS_HPP
+
+#include <atomic>
+
+class Statistics {
+  public:
+    [[nodiscard]] static auto Instance() noexcept -> Statistics& {
+        static Statistics instance{};
+        return instance;
+    }
+
+    void Reset() noexcept {
+        num_actions_queued_ = 0;
+        num_actions_cached_ = 0;
+        num_actions_flaky_ = 0;
+        num_actions_flaky_tainted_ = 0;
+        num_rebuilt_actions_compared_ = 0;
+        num_rebuilt_actions_missing_ = 0;
+    }
+    void IncrementActionsQueuedCounter() noexcept { ++num_actions_queued_; }
+    void IncrementActionsCachedCounter() noexcept { ++num_actions_cached_; }
+    void IncrementActionsFlakyCounter() noexcept { ++num_actions_flaky_; }
+    void IncrementActionsFlakyTaintedCounter() noexcept {
+        ++num_actions_flaky_tainted_;
+    }
+    void IncrementRebuiltActionMissingCounter() noexcept {
+        ++num_rebuilt_actions_missing_;
+    }
+    void IncrementRebuiltActionComparedCounter() noexcept {
+        ++num_rebuilt_actions_compared_;
+    }
+    [[nodiscard]] auto ActionsQueuedCounter() const noexcept -> int {
+        return num_actions_queued_;
+    }
+    [[nodiscard]] auto ActionsCachedCounter() const noexcept -> int {
+        return num_actions_cached_;
+    }
+    [[nodiscard]] auto ActionsFlakyCounter() const noexcept -> int {
+        return num_actions_flaky_;
+    }
+    [[nodiscard]] auto ActionsFlakyTaintedCounter() const noexcept -> int {
+        return num_actions_flaky_tainted_;
+    }
+    [[nodiscard]] auto RebuiltActionMissingCounter() const noexcept -> int {
+        return num_rebuilt_actions_missing_;
+    }
+    [[nodiscard]] auto RebuiltActionComparedCounter() const noexcept -> int {
+        return num_rebuilt_actions_compared_;
+    }
+
+  private:
+    std::atomic<int> num_actions_queued_{};
+    std::atomic<int> num_actions_cached_{};
+    std::atomic<int> num_actions_flaky_{};
+    std::atomic<int> num_actions_flaky_tainted_{};
+    std::atomic<int> num_rebuilt_actions_missing_{};
+    std::atomic<int> num_rebuilt_actions_compared_{};
+};
+
+#endif  // INCLUDED_SRC_BUILDTOOL_COMMON_STATISTICS_HPP