Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/lldb/tools/lldb-perf/lib/Gauge.h

@@ -0,0 +1,51 @@
+//===-- Gauge.h -------------------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef PerfTestDriver_Gauge_h
+#define PerfTestDriver_Gauge_h
+
+#include <functional>
+#include <string>
+
+#include "Results.h"
+
+namespace lldb_perf {
+
+template <class T> class Gauge {
+public:
+  typedef T ValueType;
+
+  Gauge() {}
+
+  virtual ~Gauge() {}
+
+  virtual void Start() = 0;
+
+  virtual ValueType Stop() = 0;
+
+  virtual ValueType GetStartValue() const = 0;
+
+  virtual ValueType GetStopValue() const = 0;
+
+  virtual ValueType GetDeltaValue() const = 0;
+};
+
+template <class T>
+Results::ResultSP GetResult(const char *description, T value);
+
+template <> Results::ResultSP GetResult(const char *description, double value);
+
+template <>
+Results::ResultSP GetResult(const char *description, uint64_t value);
+
+template <>
+Results::ResultSP GetResult(const char *description, std::string value);
+}
+
+#endif