public void Commit( CommitStage c )
{
if ( Saved ) return;
if ( c == CommitStage.Prepare )
{
// Save the pages to the underlying stream.
foreach ( G.KeyValuePair<long,IndexPage> pair in PageMap )
{
IndexPage p = pair.Value;
if ( !p.Saved )
{
p.WriteHeader();
F.Position = (long)p.PageId * IndexPage.PageSize;
// For last page, only write the amount actually used (so file size is minimised)
F.Write( p.Data, 0, p.PageId == PageAlloc-1 ? p.Size() : IndexPage.PageSize );
p.Saved = true;
}
}
}
else if ( c == CommitStage.Rollback )
{
PageMap.Clear();
Initialise();
}
else F.Commit( c );
if ( c >= CommitStage.Flush ) Saved = true;
}
public void Commit( CommitStage c )
{
if ( c == CommitStage.Rollback )
{
Buffers.Clear();
UnsavedPageNums.Clear();
UnsavedAdded = false;
ReadAvail = 0;
WriteAvail = 0;
CurBufferNum = -1;
}
else if ( c == CommitStage.Write )
{
foreach ( long bufferNum in UnsavedPageNums )
{
byte [] b = GetBuffer( bufferNum );
long pos = bufferNum << BufferShift;
long n = Len - pos;
if ( n > BufferSize ) n = BufferSize;
if ( BaseStream.Position != pos ) BaseStream.Position = pos;
BaseStream.Write( b, 0, (int)n );
}
UnsavedPageNums.Clear();
UnsavedAdded = false;
BaseStream.SetLength( Len );
}
else if ( c == CommitStage.Flush )
{
BaseStream.Flush( true );
}
}
public void Rollback()
{
Buffers.Clear();
UnsavedPageNums.Clear();
UnsavedAdded = false;
ReadAvail = 0;
WriteAvail = 0;
CurBufferNum = -1;
}
public void Rollback()
{
if ( Saved ) return;
PageMap.Clear();
Initialise();
}
