SV platform dependency builds

/*

 * $Id$

 * Portable Audio I/O Library

 * Win32 platform-specific support functions

 *

 * Based on the Open Source API proposed by Ross Bencina

 * Copyright (c) 1999-2008 Ross Bencina

 *

 * Permission is hereby granted, free of charge, to any person obtaining

 * a copy of this software and associated documentation files

 * (the "Software"), to deal in the Software without restriction,

 * including without limitation the rights to use, copy, modify, merge,

 * publish, distribute, sublicense, and/or sell copies of the Software,

 * and to permit persons to whom the Software is furnished to do so,

 * subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be

 * included in all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR

 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF

 * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION

 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

 */

/*

 * The text above constitutes the entire PortAudio license; however, 

 * the PortAudio community also makes the following non-binding requests:

 *

 * Any person wishing to distribute modifications to the Software is

 * requested to send the modifications to the original developer so that

 * they can be incorporated into the canonical version. It is also 

 * requested that these non-binding requests be included along with the 

 * license above.

 */

/** @file

 @ingroup win_src

 @brief Win32 implementation of platform-specific PaUtil support functions.

*/

#include <windows.h>

#if defined(WINAPI_FAMILY) && (WINAPI_FAMILY == WINAPI_FAMILY_APP)

        #include <sys/timeb.h> /* for _ftime_s() */

#else

        #include <mmsystem.h> /* for timeGetTime() */

        #if (defined(WIN32) && (defined(_MSC_VER) && (_MSC_VER >= 1200))) && !defined(_WIN32_WCE) /* MSC version 6 and above */

        #pragma comment( lib, "winmm.lib" )

        #endif

#endif

#include "pa_util.h"

/*

   Track memory allocations to avoid leaks.

 */

#if PA_TRACK_MEMORY

static int numAllocations_ = 0;

#endif

void *PaUtil_AllocateMemory( long size )

{

    void *result = GlobalAlloc( GPTR, size );

#if PA_TRACK_MEMORY

    if( result != NULL ) numAllocations_ += 1;

#endif

    return result;

}

void PaUtil_FreeMemory( void *block )

{

    if( block != NULL )

    {

        GlobalFree( block );

#if PA_TRACK_MEMORY

        numAllocations_ -= 1;

#endif

    }

}

int PaUtil_CountCurrentlyAllocatedBlocks( void )

{

#if PA_TRACK_MEMORY

    return numAllocations_;

#else

    return 0;

#endif

}

void Pa_Sleep( long msec )

{

    Sleep( msec );

}

static int usePerformanceCounter_;

static double secondsPerTick_;

void PaUtil_InitializeClock( void )

{

    LARGE_INTEGER ticksPerSecond;

    if( QueryPerformanceFrequency( &ticksPerSecond ) != 0 )

    {

        usePerformanceCounter_ = 1;

        secondsPerTick_ = 1.0 / (double)ticksPerSecond.QuadPart;

    }

    else

    {

        usePerformanceCounter_ = 0;

    }

}

double PaUtil_GetTime( void )

{

    LARGE_INTEGER time;

    if( usePerformanceCounter_ )

    {

        /*

            Note: QueryPerformanceCounter has a known issue where it can skip forward

            by a few seconds (!) due to a hardware bug on some PCI-ISA bridge hardware.

            This is documented here:

            http://support.microsoft.com/default.aspx?scid=KB;EN-US;Q274323&

            The work-arounds are not very paletable and involve querying GetTickCount 

            at every time step.

            Using rdtsc is not a good option on multi-core systems.

            For now we just use QueryPerformanceCounter(). It's good, most of the time.

        */

        QueryPerformanceCounter( &time );

        return time.QuadPart * secondsPerTick_;

    }

    else

    {

#ifndef UNDER_CE

        #if defined(WINAPI_FAMILY) && (WINAPI_FAMILY == WINAPI_FAMILY_APP)

        return GetTickCount64() * .001;

        #else

        return timeGetTime() * .001;

        #endif

#else

        return GetTickCount() * .001;

#endif                

    }

}