1 files changed, 72 insertions, 0 deletions
diff --git a/tools/lldb-perf/lib/Metric.h b/tools/lldb-perf/lib/Metric.h
new file mode 100644
index 0000000000000..45342d25b41ae
--- /dev/null
+++ b/tools/lldb-perf/lib/Metric.h
@@ -0,0 +1,72 @@
+//===-- Metric.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__Metric__
+#define __PerfTestDriver__Metric__
+
+#include <vector>
+#include <string>
+#include <mach/task_info.h>
+
+namespace lldb_perf {
+
+class MemoryStats;
+
+template <class ValueType>
+class Metric
+{
+public:
+    enum class StandardDeviationMode
+    {
+        eSample,
+        ePopulation
+    };
+    
+    Metric ();
+    Metric (const char*, const char* = NULL);
+    
+    void
+    Append (ValueType v);
+    
+    ValueType
+    GetAverage () const;
+    
+    size_t
+    GetCount () const;
+    
+    ValueType
+    GetSum () const;
+    
+    ValueType
+    GetStandardDeviation (StandardDeviationMode mode = StandardDeviationMode::ePopulation) const;
+    
+    const char*
+    GetName () const
+    {
+        if (m_name.empty())
+            return NULL;
+        return m_name.c_str();
+    }
+
+    const char*
+    GetDescription () const
+    {
+        if (m_description.empty())
+            return NULL;
+        return m_description.c_str();
+    }
+
+private:
+    std::string m_name;
+    std::string m_description;
+    std::vector<ValueType> m_dataset;
+};
+}
+
+#endif /* defined(__PerfTestDriver__Metric__) */