Add the skeleton for the tracer

src/anki/util/Trace.h

@@ -0,0 +1,90 @@
+// Copyright (C) 2009-2018, Panagiotis Christopoulos Charitos and contributors.
+// All rights reserved.
+// Code licensed under the BSD License.
+// http://www.anki3d.org/LICENSE
+
+#pragma once
+
+#include <anki/util/File.h>
+
+namespace anki
+{
+
+/// @addtogroup util_other
+/// @{
+
+/// Tracer.
+class Tracer : public NonCopyable
+{
+public:
+	Tracer();
+
+	~Tracer();
+
+	ANKI_USE_RESULT Error init(GenericMemoryPoolAllocator<U8> alloc, const CString& cacheDir);
+
+	void registerEvent(const char* name);
+
+	void registerCounter(const char* name);
+
+	void startEvent();
+
+	void stopEvent(U64 hash);
+
+	void increaseCounter(const char* eventName, U64 hash, U64 value);
+
+	/// Call it to begin the frame.
+	void beginFrame();
+
+	/// Call it to end the frame.
+	void endFrame();
+
+	Bool getEnabled() const
+	{
+		return m_enabled;
+	}
+
+	void setEnabled(Bool enable)
+	{
+		m_enabled = enable;
+	}
+
+private:
+	GenericMemoryPoolAllocator<U8> m_alloc;
+
+	Bool8 m_enabled = false;
+
+	File m_traceFile;
+	File m_counterFile;
+
+	struct Event
+	{
+		const char* m_name;
+		Second m_timestamp;
+		Second m_duration;
+		ThreadId m_tid;
+	};
+
+	struct Counter
+	{
+		const char* m_name;
+		U64 m_hash;
+		U64 m_value;
+	};
+
+	class PerThread
+	{
+	public:
+		ThreadId m_tid;
+		DynamicArray<Event> m_events;
+		DynamicArray<Counter> m_counters;
+	};
+
+	static thread_local PerThread* m_perThread;
+
+	DynamicArray<PerThread> m_perThread;
+	Mutex m_perThreadMtx;
+};
+/// @}
+
+} // end namespace anki