clock_impl.cpp

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/** @file
 *  @author Bram de Greve (bramz@users.sourceforge.net)
 *  @author Tom De Muer (tomdemuer@users.sourceforge.net)
 *
 *  *** BEGIN LICENSE INFORMATION ***
 *  
 *  The contents of this file are subject to the Common Public Attribution License 
 *  Version 1.0 (the "License"); you may not use this file except in compliance with 
 *  the License. You may obtain a copy of the License at 
 *  http://lass.sourceforge.net/cpal-license. The License is based on the 
 *  Mozilla Public License Version 1.1 but Sections 14 and 15 have been added to cover 
 *  use of software over a computer network and provide for limited attribution for 
 *  the Original Developer. In addition, Exhibit A has been modified to be consistent 
 *  with Exhibit B.
 *  
 *  Software distributed under the License is distributed on an "AS IS" basis, WITHOUT 
 *  WARRANTY OF ANY KIND, either express or implied. See the License for the specific 
 *  language governing rights and limitations under the License.
 *  
 *  The Original Code is LASS - Library of Assembled Shared Sources.
 *  
 *  The Initial Developer of the Original Code is Bram de Greve and Tom De Muer.
 *  The Original Developer is the Initial Developer.
 *  
 *  All portions of the code written by the Initial Developer are:
 *  Copyright (C) 2004-2007 the Initial Developer.
 *  All Rights Reserved.
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 *  Contributor(s):
 *
 *  Alternatively, the contents of this file may be used under the terms of the 
 *  GNU General Public License Version 2 or later (the GPL), in which case the 
 *  provisions of GPL are applicable instead of those above.  If you wish to allow use
 *  of your version of this file only under the terms of the GPL and not to allow 
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 *  deleting the provisions above and replace them with the notice and other 
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 *  a recipient may use your version of this file under either the CPAL or the GPL.
 *  
 *  *** END LICENSE INFORMATION ***
 */



#include "util_common.h"
#include "clock_impl.h"

// --- win32 ---------------------------------------------------------------------------------------

#if defined(LASS_UTIL_CLOCK_WIN32)
#   pragma LASS_NOTE("util::Clock: using win32 implementation")

#define NOMINMAX
#define WIN32_LEAN_AND_MEAN
#include <windows.h>

namespace lass
{
namespace util
{
namespace impl
{

const ClockImpl::TTick ClockImpl::frequency()
{
    TTick result;
    LASS_ENFORCE_WINAPI(QueryPerformanceFrequency(reinterpret_cast<LARGE_INTEGER*>(&result)))
        ("Hardware does not support a high-resolution performance counter.");
    return result;
}



const ClockImpl::TTick ClockImpl::tick()
{
    TTick result;
    LASS_ENFORCE_WINAPI(QueryPerformanceCounter(reinterpret_cast<LARGE_INTEGER*>(&result)));
    return result;
}

}

}

}

#endif

// --- standard c ----------------------------------------------------------------------------------

#if defined(LASS_UTIL_CLOCK_STANDARD_C)
//# if !defined(CLK_TCK)
//#     include <unistd.h>
//#     define CLK_TCK sysconf(_SC_CLK_TCK)
//# endif
//# pragma LASS_NOTE("util::Clock: using standard C implementation")

namespace lass
{
namespace util
{
namespace impl
{

const ClockImpl::TTick ClockImpl::frequency()
{
    return CLOCKS_PER_SEC;
}



const ClockImpl::TTick ClockImpl::tick()
{
    return ::clock();
}

}

}

}

#endif

// EOF