/// <summary>
/// Non-blocking receive of next message from the transmission stream.
/// <para>
/// If loss has occurred then <seealso cref="LappedCount()"/> will be incremented.
///
/// </para>
/// </summary>
/// <returns> true if transmission is available with <seealso cref="Offset()"/>, <seealso cref="Length()"/> and <seealso cref="TypeId()"/>
/// set for the next message to be consumed. If no transmission is available then false. </returns>
public bool ReceiveNext()
{
var isAvailable = false;
var buffer = _buffer;
var tail = buffer.GetLongVolatile(_tailCounterIndex);
var cursor = _nextRecord;
if (tail > cursor)
{
var recordOffset = (int)cursor & (_capacity - 1);
if (!Validate(cursor))
{
_lappedCount.LazySet(_lappedCount.Get() + 1);
cursor = buffer.GetLong(_latestCounterIndex);
recordOffset = (int)cursor & (_capacity - 1);
}
_cursor = cursor;
_nextRecord = cursor + BitUtil.Align(buffer.GetInt(RecordDescriptor.GetLengthOffset(recordOffset)), RecordDescriptor.RecordAlignment);
if (RecordDescriptor.PaddingMsgTypeID == buffer.GetInt(RecordDescriptor.GetTypeOffset(recordOffset)))
{
recordOffset = 0;
_cursor = _nextRecord;
_nextRecord += BitUtil.Align(buffer.GetInt(RecordDescriptor.GetLengthOffset(recordOffset)), RecordDescriptor.RecordAlignment);
}
_recordOffset = recordOffset;
isAvailable = true;
}
return(isAvailable);
}
/// <summary>
/// The length of the next message in the transmission stream.
/// </summary>
/// <returns> length of the next message in the transmission stream. </returns>
public int Length()
{
return(_buffer.GetInt(RecordDescriptor.GetLengthOffset(_recordOffset)) - RecordDescriptor.HeaderLength);
}
/// <summary>
/// The offset for the beginning of the next message in the transmission stream.
/// </summary>
/// <returns> offset for the beginning of the next message in the transmission stream. </returns>
public int Offset()
{
return(RecordDescriptor.GetMsgOffset(_recordOffset));
}
/// <summary>
/// Type of the message received.
/// </summary>
/// <returns> typeId of the message received. </returns>
public int TypeId()
{
return(_buffer.GetInt(RecordDescriptor.GetTypeOffset(_recordOffset)));
}
