internal RecordEnumerable(LogRecordSequence recordSequence,
CLFS_CONTEXT_MODE mode,
ulong startLsn)
{
this.recordSequence = recordSequence;
this.mode = mode;
this.startLsn = startLsn;
}
internal LogLogRecordEnumerator(LogRecordSequence recordSequence,
CLFS_CONTEXT_MODE mode,
ulong startLsn)
{
this.recordSequence = recordSequence;
this.mode = mode;
this.startLsn = startLsn;
this.syncRoot = new object();
this.state = State.BeforeFirst;
}
public static bool ReadLogRecordSync(SafeMarshalContext pvMarshal,
[In] ref ulong plsnFirst,
CLFS_CONTEXT_MODE ecxMode,
out byte* ppvReadBuffer,
out int pcbReadBuffer,
out byte peRecordType,
out ulong plsnUndoNext,
out ulong plsnPrevious,
out SafeReadContext ppvReadContext)
{
if (!_ReadLogRecord(pvMarshal,
ref plsnFirst,
ecxMode,
out ppvReadBuffer,
out pcbReadBuffer,
out peRecordType,
out plsnUndoNext,
out plsnPrevious,
out ppvReadContext,
null))
{
uint errorCode = (uint)Marshal.GetLastWin32Error();
Utility.CloseInvalidOutSafeHandle(ppvReadContext);
ppvReadContext = null;
if (errorCode == Error.ERROR_IO_PENDING)
{
// The CLFS API was called with a NULL overlapped, so the operation should not be asynchronous.
// This means that CLFS has a bug, so it is not safe to continue processing.
DiagnosticUtility.FailFast("No async in ReadLogRecordSync");
}
switch (errorCode)
{
case Error.ERROR_HANDLE_EOF:
return false;
case Error.ERROR_NOT_FOUND:
case Error.ERROR_LOG_START_OF_LOG:
case Error.ERROR_LOG_BLOCK_INVALID:
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(Error.ArgumentInvalid(SR.Argument_InvalidStartSequenceNumber));
case Error.ERROR_LOG_BLOCK_INCOMPLETE:
case Error.ERROR_INVALID_HANDLE:
case Error.ERROR_ACCESS_DENIED:
case Error.ERROR_INVALID_PARAMETER:
case Error.ERROR_IO_DEVICE:
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(Error.ExceptionForKnownCode(errorCode));
default:
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(Error.ExceptionForUnknownCode(errorCode));
}
}
return true;
}
extern static bool _ReadLogRecord(
SafeMarshalContext pvMarshal,
[In] ref ulong plsnFirst,
CLFS_CONTEXT_MODE ecxMode,
out byte* ppvReadBuffer,
out int pcbReadBuffer,
out byte peRecordType,
out ulong plsnUndoNext,
out ulong plsnPrevious,
out SafeReadContext ppvReadContext,
NativeOverlapped* pOverlapped);
