/// <summary>
/// Initializes a new instance of the <see cref="ConcurrentRequestExecutor"/> class with the specified
/// connection and memory pool.
/// </summary>
/// <param name="connection">The <see cref="S7Connection"/> that is used for this executor.</param>
/// <param name="memoryPool">
/// The <see cref="MemoryPool{T}" /> that is used for request and response memory allocations.
/// </param>
public ConcurrentRequestExecutor(S7Connection connection, MemoryPool <byte>?memoryPool = default)
{
if (connection.Parameters == null)
{
Sally7CommunicationSetupException.ThrowConnectionParametersNotSet();
}
Connection = connection;
socket = connection.TcpClient.Client;
bufferSize = connection.Parameters.GetRequiredBufferSize();
maxRequests = connection.Parameters.MaximumNumberOfConcurrentRequests;
this.memoryPool = memoryPool ?? MemoryPool <byte> .Shared;
jobPool = new JobPool(connection.Parameters.MaximumNumberOfConcurrentRequests);
sendSignal = new Signal();
receiveSignal = new Signal();
if (!sendSignal.TryInit())
{
Sally7Exception.ThrowFailedToInitSendingSignal();
}
if (!receiveSignal.TryInit())
{
Sally7Exception.ThrowFailedToInitReceivingSignal();
}
reader = new SocketTpktReader(socket);
#if !NETSTANDARD2_1_OR_GREATER && !NET5_0_OR_GREATER
sendAwaitable = new SocketAwaitable(new SocketAsyncEventArgs());
#endif
}
private static Tsap GetDestinationTsap(CpuType cpuType, int?rack, int?slot)
{
switch (cpuType)
{
case CpuType.S7_200:
return(new Tsap(0x10, 0x00));
case CpuType.S7_300:
case CpuType.S7_400:
case CpuType.S7_1200:
case CpuType.S7_1500:
if (rack == null)
{
Sally7CommunicationSetupException.ThrowDestinationRackIsNull(cpuType, rack);
}
if (slot == null)
{
Sally7CommunicationSetupException.ThrowDestinationSlotIsNull(cpuType, slot);
}
return(new Tsap(0x03, (byte)((rack.GetValueOrDefault() << 5) | slot.GetValueOrDefault())));
default:
Sally7CommunicationSetupException.ThrowCpuTypeNotSupported(cpuType);
return(default); // to make the compiler happy
}
}
private static Tsap GetSourceTsap(CpuType cpuType)
{
switch (cpuType)
{
case CpuType.S7_200:
return(new Tsap(0x10, 0x00));
case CpuType.S7_300:
case CpuType.S7_400:
case CpuType.S7_1200:
return(new Tsap(0x01, 0x00));
case CpuType.S7_1500:
return(new Tsap(0x10, 0x02));
default:
Sally7CommunicationSetupException.ThrowCpuTypeNotSupported(cpuType);
return(default); // to make the compiler happy
}
}
