mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-19 10:32:02 -05:00
8d353a5b3b
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/trunk@189 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
135 lines
3.3 KiB
C
135 lines
3.3 KiB
C
/*
|
|
* $Id$
|
|
* Portable Audio I/O Library
|
|
* Win32 platform-specific support functions
|
|
*
|
|
* Based on the Open Source API proposed by Ross Bencina
|
|
* Copyright (c) 1999-2000 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.
|
|
*
|
|
* 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.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/** @file
|
|
Win32 platform-specific support functions.
|
|
|
|
@todo Implement workaround for QueryPerformanceCounter() skipping forward
|
|
bug. (see msdn kb Q274323).
|
|
*/
|
|
|
|
#include <windows.h>
|
|
#include <mmsystem.h> /* for timeGetTime() */
|
|
|
|
#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_ )
|
|
{
|
|
/* FIXME:
|
|
according to this knowledge-base article, QueryPerformanceCounter
|
|
can skip forward by seconds!
|
|
http://support.microsoft.com/default.aspx?scid=KB;EN-US;Q274323&
|
|
|
|
it may be better to use the rtdsc instruction using inline asm,
|
|
however then a method is needed to calculate a ticks/seconds ratio.
|
|
*/
|
|
QueryPerformanceCounter( &time );
|
|
return time.QuadPart * secondsPerTick_;
|
|
}
|
|
else
|
|
{
|
|
return timeGetTime() * .001;
|
|
}
|
|
}
|