U32 CPtsRecordBase::TotalRecSize (BOOL fIncludePhantoms /* = TRUE */ ) const
{
U32 cbMyRet;
const CharVarField * pVarField;
U32 i;
cbMyRet = size;
if (m_cVarFields > 0)
{
pVarField = ConstVarField (0);
for (i = 1; i <= m_cVarFields; i ++)
{
if (fIncludePhantoms || (pVarField->ConstPtr() != NULL))
{
// is this the record's last varfield?
if (i < m_cVarFields)
{
// round non-last field size to four-byte size, since
// PTS requires that subsequent fields be aligned
// on four-byte boundaries in a contiguous row buffer.
cbMyRet += RoundSize (pVarField->Size());
}
else
{
// for the last varfield, leave its size true.
cbMyRet += pVarField->Size();
}
}
pVarField ++;
}
}
return (cbMyRet);
} /* end of CPtsRecordBase::TotalRecSize */
void CPtsRecordBase::ConvertVarFieldOffsetsToPointers
(U32 cbActualTotalRecordSize)
{
BOOL fHaveVarData; // does our record have actual data?
CharVarField * pVarField;
U32 i;
// do we have variable field data, or are we a "truncated" record
// with just our fixed header part?
fHaveVarData = (cbActualTotalRecordSize == TotalRecSize());
// we only allow all variable length fields, or none.
assert ((cbActualTotalRecordSize == size) || fHaveVarData);
if (VarFieldCount() > 0)
{
// may have offset varfields, so change them into pointers
pVarField = VarField(0);
for (i = 0; i < VarFieldCount(); i ++)
{
if (fHaveVarData)
{
// got vardata, but is descriptor converted to pointer form yet?
if (! pVarField->IsPointerForm ())
{
// nope, let's convert descriptor to pointer form.
// offset should be somewhere within our record data, or it
// could be an empty var field (jlo)
assert ((pVarField->Size()==0) ||
((pVarField->Offset() >= size) &&
(pVarField->Offset() <=
(cbActualTotalRecordSize - pVarField->Size()))));
// varfield's data should also be four-byte aligned:
assert (pVarField->Offset() == RoundSize (pVarField->Offset()));
if ((pVarField->Offset() >= size) &&
(pVarField->Offset() <=
(cbActualTotalRecordSize - pVarField->Size())))
{
// got varfield data, so make an honest varfield pointer
pVarField->ChangeOffsetToPointer (this);
}
else
{
// this is either an empty var field, or it has an invalid offset.
// either way, set to be empty. (jlo)
pVarField->Set (NULL, 0);
}
}
}
else
{
// for now, we mark a phantom by setting its ptr to zero,
// while leaving its data size value intact.
pVarField->SetOffset (0);
}
// jlo - advance to next pVarField
pVarField++;
}
}
// all done
return;
} /* end of CPtsRecordBase::ConvertVarFieldOffsetsToPointers */
void CPtsRecordBase::WriteRecordAsSgl (Message *pMsg, U32 iSgl) const
{
const U32 cbTotalRec = TotalRecSize (FALSE); // only real data
CPtsRecordBase strHeader (*this); // modifiable copy of our header data
const CharVarField * pVarField;
const CharVarField * pVarFieldToWrite;
U32 cbWritten;
CharVarField strVarField;
U32 offVarData;
U32 i;
assert (pMsg != NULL);
// build up a single SGL for all of our data
pMsg->AllocateSgl(iSgl, cbTotalRec);
// we write the fixed header data in a couple of pieces: base header,
// other fixed header data except for trailing varfield descriptors,
// and finally the varfield descriptors themselves.
// we might need to patch strHeader.m_mFlags; this is why we write
// our header separately from the derived record's fixed header.
// At present however, we have no flags to modify.
// strHeader.m_mFlags &= ~k_PRBVarAddressesAreAbsolute;
// write header to SGL
pMsg->CopyToSgl (iSgl, 0, &strHeader, sizeof (strHeader));
// (header should always have a round size)
assert (sizeof (strHeader) == RoundSize (sizeof (strHeader)));
cbWritten = sizeof (strHeader);
// write derived class' fixed data, except for varfield descriptors
i = size - m_cVarFields * sizeof (CharVarField) - sizeof (strHeader);
// (derived class' fixed data should also have a round size)
assert (i == RoundSize (i));
pMsg->CopyToSgl (iSgl, cbWritten, ((U8 *) this) + cbWritten, i);
cbWritten += i;
// next, the varfields (if any)
if (m_cVarFields > 0)
{
// now scoot through writing fixed up offset versions of each
// varfield to SGL:
pVarField = ConstVarField (0);
// we're advanced to the start of our varfield descriptors
assert (cbWritten == (size - m_cVarFields * sizeof (CharVarField)));
// each varfield descriptor also must have a round size
assert (sizeof (*pVarField) == RoundSize (sizeof (*pVarField)));
// go through varfields, fixing up & writing each descriptor
offVarData = size; // offset of first var field's data
for (i = 0; i < m_cVarFields; i ++)
{
if (pVarField->IsPointerForm ())
{
// build up corrected offset form of varfield descriptor
if (pVarField->HasRealData())
{
// keep size, change to offset in our own synthetic record
strVarField.SetOffset (offVarData, pVarField->m_cbData);
// bump offset of next varfield, if any
offVarData += RoundSize (strVarField.Size());
}
else
{
// if it was a phantom, it's now empty.
// (we don't like munging phantoms)
assert (pVarField->ConstPtr() == NULL);
strVarField.Set (NULL, 0);
}
// we write our fabricated varfield descriptor:
pVarFieldToWrite = &strVarField;
}
else
{
// varfield descriptor is already in offset form, so we don't
// have to do anything to prep it for writing.
pVarFieldToWrite = pVarField;
}
// write varfield to SGL
pMsg->CopyToSgl (iSgl, cbWritten,
(void *) pVarFieldToWrite, sizeof (*pVarFieldToWrite));
cbWritten += RoundSize (sizeof (*pVarFieldToWrite));
// done with this varfield, move on to next
pVarField ++;
}
// phew! All done with header, including varfield descriptors.
// Now write varfield data.
pVarField = ConstVarField(0);
for (i = 0; i < m_cVarFields; i ++)
{
// write varfield's actual data, if any
// Note that we copy only the bytes which are actually defined
// for the varfield, but we allot it space in the SGL buffer
// for the varfield's four-byte rounded varfield data size.
// PTS defines this layout; all PTS record fields must be four-byte
// aligned, including varfield data.
if (pVarField->HasRealData ())
{
// we copy just the true amount of varfield data into the SGL
pMsg->CopyToSgl (iSgl, cbWritten, (void *) pVarField->ConstPtr(),
pVarField->Size());
// but then we account for it as if we had written the
// four-byte rounded equivalent. This is accounted for
// by the total size calculations used for AllocateSgl().
cbWritten += RoundSize (pVarField->Size());
}
// jlo - advance to next pVarfield
pVarField++;
}
}
// all done
return;
} /* end of CPtsRecordBase::WriteRecordAsSgl */
void Flush(void* memory, AllocatorSizeType size)
{
if (memory)
DCFlushRange(memory, RoundSize(size));
}
void Clear(void* memory, AllocatorSizeType size)
{
if (memory)
memset(memory, 0, RoundSize(size));
}
void* Allocate(AllocatorSizeType size)
{
return memalign(32, RoundSize(size));
}
