Add Stopwatch class

1 files changed, 40 insertions, 0 deletions

diff --git a/toolsrc/include/Stopwatch.h b/toolsrc/include/Stopwatch.h
new file mode 100644
index 000000000..2bd5c31bf
--- /dev/null
+++ b/toolsrc/include/Stopwatch.h
@@ -0,0 +1,40 @@
+#pragma once
+
+#include <chrono>
+#include <string>
+
+namespace vcpkg
+{
+    class Stopwatch
+    {
+    public:
+        static Stopwatch createUnstarted();
+
+        static Stopwatch createStarted();
+
+        bool isRunning() const;
+
+        Stopwatch& start();
+
+        Stopwatch& stop();
+
+        Stopwatch& reset();
+
+        template <class TimeUnit>
+        TimeUnit elapsed() const
+        {
+            return std::chrono::duration_cast<TimeUnit>(elapsedNanos());
+        }
+
+        std::string toString() const;
+
+    private:
+        Stopwatch();
+
+        std::chrono::nanoseconds elapsedNanos() const;
+
+        bool m_isRunning;
+        std::chrono::nanoseconds m_elapsedNanos;
+        std::chrono::steady_clock::time_point m_startTick;
+    };
+}