#include "precomp.h"

Include dependency graph for utility.c:

Functions
PVOID	AllocateMemory (IN UINT Size)

VOID	FreeMemory (IN PVOID Pointer)

UINT	GetMemoryAllocationCount ()

UINT	GetDigitCount (IN UINT Number)

MMRESULT	Win32ErrorToMmResult (IN UINT ErrorCode)

MMRESULT	TranslateInternalMmResult (IN MMRESULT Result)

Variables
static HANDLE	ProcessHeapHandle = NULL

static UINT	CurrentAllocations = 0

Function Documentation

◆ AllocateMemory()

PVOID AllocateMemory ( IN UINT Size )

Definition at line 20 of file utility.c.

{
    PVOID Pointer = NULL;
 
    if ( ! ProcessHeapHandle )
        ProcessHeapHandle = GetProcessHeap();
 
    Pointer = HeapAlloc(ProcessHeapHandle, HEAP_ZERO_MEMORY, Size);
 
    if ( ! Pointer )
        return NULL;
 
    ++ CurrentAllocations;
 
    return Pointer;
}

◆ FreeMemory()

VOID FreeMemory ( IN PVOID Pointer )

Definition at line 42 of file utility.c.

{
    SND_ASSERT( ProcessHeapHandle );
    SND_ASSERT( Pointer );
 
    HeapFree(ProcessHeapHandle, 0, Pointer);
 
    -- CurrentAllocations;
}

◆ GetDigitCount()

UINT GetDigitCount ( IN UINT Number )

Definition at line 68 of file utility.c.

{
    UINT Value = Number;
    ULONG Digits = 1;
 
    while ( Value > 9 )
    {
        Value /= 10;
        ++ Digits;
    }
 
    return Digits;
}

Referenced by DetectNt4SoundDevices(), and OpenSoundDeviceRegKey().

◆ GetMemoryAllocationCount()

UINT GetMemoryAllocationCount ( )

Definition at line 58 of file utility.c.

{
    return CurrentAllocations;
}

Referenced by DriverProc().

◆ TranslateInternalMmResult()

MMRESULT TranslateInternalMmResult ( IN MMRESULT Result )

Definition at line 132 of file utility.c.

{
    switch ( Result )
    {
        case MMSYSERR_INVALPARAM :
        case MMSYSERR_INVALFLAG :
        {
            return MMSYSERR_ERROR;
        }
    }
 
    return Result;
}

Referenced by CreateSoundDeviceInstance(), CreateSoundThread(), DestroySoundDeviceInstance(), GetNt4SoundDeviceCapabilities(), GetSoundDeviceCapabilities(), MmeCloseDevice(), MmeGetDeviceInterfaceString(), MmeGetLineInfo(), MmeGetPosition(), MmeOpenDevice(), MmeSetState(), OpenNt4KernelSoundDevice(), PopulateWdmDeviceList(), PrepareWaveHeader(), QueryNt4WaveDeviceFormatSupport(), QueryWaveDeviceFormatSupport(), SetNt4WaveDeviceFormat(), SetWaveDeviceFormat(), StopStreaming(), UnlistSoundDeviceInstance(), UnprepareWaveHeader(), WdmAudCloseSoundDeviceByLegacy(), WdmAudCloseSoundDeviceByMMixer(), WdmAudCommitWaveBufferByLegacy(), WdmAudCommitWaveBufferByMMixer(), WdmAudGetCapabilitiesByLegacy(), WdmAudGetDeviceInterfaceStringByLegacy(), WdmAudGetNumWdmDevsByLegacy(), WdmAudGetWavePositionByLegacy(), WdmAudSetMixerDeviceFormatByLegacy(), WdmAudSetWaveDeviceFormatByLegacy(), WdmAudSetWaveDeviceFormatByMMixer(), WdmAudSetWaveStateByLegacy(), and WriteWaveHeader().

◆ Win32ErrorToMmResult()

MMRESULT Win32ErrorToMmResult ( IN UINT ErrorCode )

Definition at line 87 of file utility.c.

{
    switch ( ErrorCode )
    {
        case NO_ERROR :
        case ERROR_IO_PENDING :
            return MMSYSERR_NOERROR;
 
        case ERROR_BUSY :
            return MMSYSERR_ALLOCATED;
 
        case ERROR_NOT_SUPPORTED :
        case ERROR_INVALID_FUNCTION :
            return MMSYSERR_NOTSUPPORTED;
 
        case ERROR_NOT_ENOUGH_MEMORY :
            return MMSYSERR_NOMEM;
 
        case ERROR_ACCESS_DENIED :
            return MMSYSERR_BADDEVICEID;
 
        case ERROR_INSUFFICIENT_BUFFER :
            return MMSYSERR_INVALPARAM;
 
        case ERROR_INVALID_PARAMETER :
            return MMSYSERR_INVALPARAM;
 
 
        default :
            return MMSYSERR_ERROR;
    }
}

Referenced by CreateSoundThread(), InitEntrypointMutexes(), OpenKernelSoundDeviceByName(), and SyncOverlappedDeviceIoControl().

Variable Documentation

◆ CurrentAllocations

UINT CurrentAllocations = 0

static

Definition at line 14 of file utility.c.

Referenced by AllocateMemory(), FreeMemory(), and GetMemoryAllocationCount().

◆ ProcessHeapHandle

HANDLE ProcessHeapHandle = NULL