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#include "stdafx.h"
#include "LargeBuffer.h"
using namespace CpuCompute;
void LargeBuffer::deallocate()
{
if( nullptr == pv )
return;
VirtualFree( pv, 0, MEM_RELEASE );
pv = nullptr;
}
HRESULT LargeBuffer::allocate( size_t cb )
{
deallocate();
pv = VirtualAlloc( nullptr, cb, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE );
if( nullptr != pv )
return S_OK;
return HRESULT_FROM_WIN32( GetLastError() );
}
HRESULT LargeBuffer::setReadOnly( size_t cb )
{
if( nullptr != pv )
{
DWORD op = 0;
if( VirtualProtect( pv, cb, PAGE_READONLY, &op ) )
return S_OK;
return HRESULT_FROM_WIN32( GetLastError() );
}
else
return OLE_E_BLANK;
}
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