private void BreakChecksum(PageCursor cursor)
{
// Doesn't matter which bits we destroy actually. Destroying the first ones requires
// no additional knowledge about where checksum is stored
long existing = cursor.GetLong(cursor.Offset);
cursor.PutLong(cursor.Offset, ~existing);
}
public override long Get(long index)
{
long pageId = pageId(index);
int offset = offset(index);
try
{
using (PageCursor cursor = PagedFile.io(pageId, PF_SHARED_READ_LOCK))
{
cursor.Next();
long result;
do
{
result = cursor.GetLong(offset);
} while (cursor.ShouldRetry());
CheckBounds(cursor);
return(result);
}
}
catch (IOException e)
{
throw new UncheckedIOException(e);
}
}