Big update.

src/PerformanceMonitor.h

@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU GPL v2 license, you may redistribute it and/or modify it under version 2 of the License, or (at your option), any later version.
+ */
+
+#ifndef _PLAYERBOT_PERFORMANCEMONITOR_H
+#define _PLAYERBOT_PERFORMANCEMONITOR_H
+
+#include "Common.h"
+
+#include <chrono>
+#include <ctime>
+#include <map>
+#include <mutex>
+#include <vector>
+
+typedef std::vector<std::string> PerformanceStack;
+
+struct PerformanceData
+{
+    uint32 minTime;
+    uint32 maxTime;
+    uint32 totalTime;
+    uint32 count;
+    std::mutex lock;
+};
+
+enum PerformanceMetric
+{
+    PERF_MON_TRIGGER,
+    PERF_MON_VALUE,
+    PERF_MON_ACTION,
+    PERF_MON_RNDBOT,
+    PERF_MON_TOTAL
+};
+
+class PerformanceMonitorOperation
+{
+    public:
+        PerformanceMonitorOperation(PerformanceData* data, std::string const name, PerformanceStack* stack);
+        void finish();
+
+    private:
+        PerformanceData* data;
+        std::string const name;
+        PerformanceStack* stack;
+        std::chrono::milliseconds started;
+};
+
+class PerformanceMonitor
+{
+    public:
+        PerformanceMonitor() { };
+        virtual ~PerformanceMonitor() { };
+        static PerformanceMonitor* instance()
+        {
+            static PerformanceMonitor instance;
+            return &instance;
+        }
+
+	public:
+        PerformanceMonitorOperation* start(PerformanceMetric metric, std::string const name, PerformanceStack* stack = nullptr);
+        void PrintStats(bool perTick = false,  bool fullStack = false);
+        void Reset();
+
+	private:
+        std::map<PerformanceMetric, std::map<std::string, PerformanceData*> > data;
+        std::mutex lock;
+};
+
+#define sPerformanceMonitor PerformanceMonitor::instance()
+
+#endif