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 PrepareToCommit() // Writes pages to the underlying file ( which will be fully buffered ).
{
if ( Saved ) return;
// Save the pages.
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;
}
}
Saved = true;
}