/// <summary>
/// Assume the given cursor is writable and has already been positioned at the record offset.
/// </summary>
public virtual long IncrementCounter(PageCursor cursor, int threadId)
{
int recordOffset = cursor.Offset;
int fieldOffset = recordOffset + (_fieldSize * threadId);
int checksumOffset = recordOffset + _checksumFieldOffset;
long newValue = 1 + cursor.GetLong(fieldOffset);
cursor.PutLong(fieldOffset, newValue);
cursor.PutLong(checksumOffset, 1 + cursor.GetLong(checksumOffset));
return(newValue);
}
/// <summary>
/// Verify the checksums on all the records on the given page
/// </summary>
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: public void verifyCheckSums(org.neo4j.io.pagecache.PageCursor cursor) throws java.io.IOException
public virtual void VerifyCheckSums(PageCursor cursor)
{
int recordsPerPage = RecordsPerPage;
for (int i = 0; i < recordsPerPage; i++)
{
int recordOffset = i * _recordSize;
long expectedChecksum;
long actualChecksum;
do
{
actualChecksum = 0;
for (int j = 0; j < _numberOfThreads; j++)
{
actualChecksum += cursor.GetLong(recordOffset + (j * _fieldSize));
}
expectedChecksum = cursor.GetLong(recordOffset + _checksumFieldOffset);
} while (cursor.ShouldRetry());
string msg = "Checksum for record " + i + " on page " + cursor.CurrentPageId;
assertThat(msg, actualChecksum, @is(expectedChecksum));
}
}
/// <summary>
/// Sum up the fields for the given thread for all records on the given page.
/// </summary>
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in C#:
//ORIGINAL LINE: public long sumCountsForThread(org.neo4j.io.pagecache.PageCursor cursor, int threadId) throws java.io.IOException
public virtual long SumCountsForThread(PageCursor cursor, int threadId)
{
int recordsPerPage = RecordsPerPage;
int fieldOffset = _fieldSize * threadId;
long sum;
do
{
sum = 0;
for (int i = 0; i < recordsPerPage; i++)
{
sum += cursor.GetLong((i * _recordSize) + fieldOffset);
}
} while (cursor.ShouldRetry());
return(sum);
}
public override long GetLong(long index, int offset)
{
long pageId = pageId(index);
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);
}
}
