dolphin/Source/Core/VideoCommon/PerfQueryBase.h

// Copyright 2012 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.

#pragma once

#include <memory>
#include "Common/CommonTypes.h"

enum PerfQueryType
{
	PQ_ZCOMP_INPUT_ZCOMPLOC = 0,
	PQ_ZCOMP_OUTPUT_ZCOMPLOC,
	PQ_ZCOMP_INPUT,
	PQ_ZCOMP_OUTPUT,
	PQ_BLEND_INPUT,
	PQ_EFB_COPY_CLOCKS,
	PQ_NUM_MEMBERS
};

enum PerfQueryGroup
{
	PQG_ZCOMP_ZCOMPLOC,
	PQG_ZCOMP,
	PQG_EFB_COPY_CLOCKS,
	PQG_NUM_MEMBERS,
};

class PerfQueryBase
{
public:
	PerfQueryBase()
		: m_query_count(0)
	{
	}

	virtual ~PerfQueryBase() {}

	// Checks if performance queries are enabled in the gameini configuration.
	// NOTE: Called from CPU+GPU thread
	static bool ShouldEmulate();

	// Begin querying the specified value for the following host GPU commands
	virtual void EnableQuery(PerfQueryGroup type) {}

	// Stop querying the specified value for the following host GPU commands
	virtual void DisableQuery(PerfQueryGroup type) {}

	// Reset query counters to zero and drop any pending queries
	virtual void ResetQuery() {}

	// Return the measured value for the specified query type
	// NOTE: Called from CPU thread
	virtual u32 GetQueryResult(PerfQueryType type) { return 0; }

	// Request the value of any pending queries - causes a pipeline flush and thus should be used carefully!
	virtual void FlushResults() {}

	// True if there are no further pending query results
	// NOTE: Called from CPU thread
	virtual bool IsFlushed() const { return true; }

protected:
	// TODO: sloppy
	volatile u32 m_query_count;
	volatile u32 m_results[PQG_NUM_MEMBERS];
};

extern std::unique_ptr<PerfQueryBase> g_perf_query;