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-rw-r--r--portaudio/src/os/win/pa_win_util.c160
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diff --git a/portaudio/src/os/win/pa_win_util.c b/portaudio/src/os/win/pa_win_util.c
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--- a/portaudio/src/os/win/pa_win_util.c
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-/*
- * $Id$
- * 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
- }
-}