framework/common/tcuCPUWarmup.hpp

#ifndef _TCUCPUWARMUP_HPP
#define _TCUCPUWARMUP_HPP
/*-------------------------------------------------------------------------
 * drawElements Quality Program Tester Core
 * ----------------------------------------
 *
 * Copyright 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 *//*!
 * \file
 * \brief CPU warm-up utility, used to counteract CPU throttling.
 *//*--------------------------------------------------------------------*/

namespace tcu
{

//! Does some dummy calculations to try and get the CPU working at full speed.
void warmupCPU (void);

namespace warmupCPUInternal
{

// \note Used in an attempt to prevent compiler from doing optimizations. Not supposed to be touched elsewhere.

class Dummy
{
public:
								Dummy	(void) : m_v(new float) {}
								~Dummy	(void) { delete m_v; }

	volatile float* volatile	m_v;
};

extern volatile Dummy g_dummy;

};

} // tcu

#endif // _TCUCPUWARMUP_HPP