CMappedMemory::CMappedMemory(const TCHAR* FileName)
: CFileAccess(FileName)
{
SYSTEM_INFO sysinfo;
m_AllocSize = 0;
m_DirectFile = 0;
m_FileMapping = 0;
m_Base = NULL;
GetSystemInfo(&sysinfo);
m_AllocGranularity = sysinfo.dwAllocationGranularity; // usually 64kb
m_MinAllocGranularity = m_AllocGranularity; // must be at least one segment
m_MaxAllocGranularity = m_AllocGranularity << 4; // usually 1mb for fast increasing
m_DirectFile = CreateFile(FileName, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL | FILE_FLAG_RANDOM_ACCESS, 0);
if (m_DirectFile == INVALID_HANDLE_VALUE)
LOGSYS(logCRITICAL, _T("CreateFile failed"));
uint32_t size = GetFileSize(m_DirectFile, NULL);
size = (size + m_AllocGranularity - 1) & ~(m_AllocGranularity - 1);
if (size == 0)
size = m_AllocGranularity;
_SetSize(size);
m_AllocSize = size;
InitJournal();
}
Box::Box(Vector3D<double> pos, double width, double length, double height)
{
_SetType(BOX);
_SetPos(pos);
_SetSize(width, length, height);
mSweepBox = SharedPtr<SweepBox>(new SweepBox);
}
uint32_t CFileAccess::Size(uint32_t NewSize)
{
m_Size = NewSize;
if (!m_Journal.Use)
{
NewSize = (NewSize + m_AllocGranularity - 1) & ~(m_AllocGranularity - 1);
if (NewSize == 0)
NewSize = m_AllocGranularity;
if (NewSize != m_AllocSize)
{
m_AllocSize = _SetSize(NewSize);
// adapt Alloc Granularity
uint32_t t = _time32(NULL);
uint32_t d = t - m_LastAllocTime;
m_LastAllocTime = t;
if (d < 30) // increase alloc stepping
{
if (m_AllocGranularity < m_MaxAllocGranularity)
m_AllocGranularity = m_AllocGranularity << 1;
} else if (d > 120) // decrease alloc stepping
{
if (m_AllocGranularity > m_MinAllocGranularity)
m_AllocGranularity = m_AllocGranularity >> 1;
}
}
Box::Box(WeakPtr<SweepBox> sweepBox)
{
_SetType(BOX);
_SetId(sweepBox.lock()->GetId());
_SetPos(sweepBox.lock()->GetPos());
_SetSize(sweepBox.lock()->GetWidth(), sweepBox.lock()->GetLength(), sweepBox.lock()->GetHeight());
_SetVelocity(sweepBox.lock()->GetVelocity());//TODO this is probably unecessary, so optimize out
mSweepBox = SharedPtr<SweepBox>(new SweepBox);
}
