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146 lines
2.9 KiB
C
146 lines
2.9 KiB
C
/*
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* PROJECT: ReactOS Sound System "MME Buddy" Library
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* LICENSE: GPL - See COPYING in the top level directory
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* FILE: lib/sound/mmebuddy/utility.c
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*
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* PURPOSE: Provides utility functions used by the library.
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*
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* PROGRAMMERS: Andrew Greenwood (silverblade@reactos.org)
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*/
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#include "precomp.h"
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static HANDLE ProcessHeapHandle = NULL;
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static UINT CurrentAllocations = 0;
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/*
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Allocates memory, zeroes it, and increases the allocation count.
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*/
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PVOID
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AllocateMemory(
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IN UINT Size)
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{
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PVOID Pointer = NULL;
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if ( ! ProcessHeapHandle )
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ProcessHeapHandle = GetProcessHeap();
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Pointer = HeapAlloc(ProcessHeapHandle, HEAP_ZERO_MEMORY, Size);
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if ( ! Pointer )
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return NULL;
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++ CurrentAllocations;
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return Pointer;
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}
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/*
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Frees memory and reduces the allocation count.
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*/
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VOID
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FreeMemory(
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IN PVOID Pointer)
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{
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SND_ASSERT( ProcessHeapHandle );
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SND_ASSERT( Pointer );
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HeapFree(ProcessHeapHandle, 0, Pointer);
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-- CurrentAllocations;
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}
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/*
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Returns the current number of memory allocations outstanding. Useful for
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detecting/tracing memory leaks.
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*/
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UINT
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GetMemoryAllocationCount()
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{
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return CurrentAllocations;
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}
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/*
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Count the number of digits in a UINT
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*/
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UINT
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GetDigitCount(
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IN UINT Number)
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{
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UINT Value = Number;
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ULONG Digits = 1;
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while ( Value > 9 )
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{
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Value /= 10;
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++ Digits;
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}
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return Digits;
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}
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/*
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Translate a Win32 error code into an MMRESULT code.
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*/
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MMRESULT
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Win32ErrorToMmResult(
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IN UINT ErrorCode)
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{
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switch ( ErrorCode )
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{
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case NO_ERROR :
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case ERROR_IO_PENDING :
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return MMSYSERR_NOERROR;
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case ERROR_BUSY :
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return MMSYSERR_ALLOCATED;
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case ERROR_NOT_SUPPORTED :
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case ERROR_INVALID_FUNCTION :
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return MMSYSERR_NOTSUPPORTED;
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case ERROR_NOT_ENOUGH_MEMORY :
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return MMSYSERR_NOMEM;
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case ERROR_ACCESS_DENIED :
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return MMSYSERR_BADDEVICEID;
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case ERROR_INSUFFICIENT_BUFFER :
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return MMSYSERR_INVALPARAM;
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case ERROR_INVALID_PARAMETER :
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return MMSYSERR_INVALPARAM;
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default :
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return MMSYSERR_ERROR;
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}
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}
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/*
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If a function invokes another function, this aids in translating the
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result code so that it is applicable in the context of the original caller.
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For example, specifying that an invalid parameter was passed probably does
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not make much sense if the parameter wasn't passed by the original caller!
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This could potentially highlight internal logic problems.
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However, things like MMSYSERR_NOMEM make sense to return to the caller.
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*/
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MMRESULT
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TranslateInternalMmResult(
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IN MMRESULT Result)
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{
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switch ( Result )
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{
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case MMSYSERR_INVALPARAM :
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case MMSYSERR_INVALFLAG :
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{
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return MMSYSERR_ERROR;
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}
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}
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return Result;
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}
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