Common: Add a built-in profiler

Source/Core/Common/Profiler.h

@@ -0,0 +1,59 @@
+// Copyright 2014 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <list>
+#include <string>
+
+#include "CommonTypes.h"
+
+class Profiler
+{
+public:
+	Profiler(const std::string& name);
+	~Profiler();
+
+	static std::string ToString();
+
+	void Start();
+	void Stop();
+	std::string Read();
+
+private:
+	static std::list<Profiler*> s_all_profilers;
+	static u32 s_max_length;
+	static u64 s_frame_time;
+	static u64 s_usecs_frame;
+
+	static std::string s_lazy_result;
+	static int s_lazy_delay;
+
+	std::string m_name;
+	u64 m_usecs;
+	u64 m_usecs_min;
+	u64 m_usecs_max;
+	u64 m_usecs_quad;
+	u64 m_calls;
+	u64 m_time;
+	int m_depth;
+};
+
+class ProfilerExecuter
+{
+public:
+	ProfilerExecuter(Profiler* _p) : m_p(_p)
+	{
+		m_p->Start();
+	}
+	~ProfilerExecuter()
+	{
+		m_p->Stop();
+	}
+private:
+	Profiler* m_p;
+};
+
+// Warning: This profiler isn't thread safe. Only profile functions which doesn't run simultaneously
+#define PROFILE(name) static Profiler prof_gen(name); ProfilerExecuter prof_e(&prof_gen);