SCSCP
  
  
              Symbolic Computation Software Composability Protocol
  
  
                                 Version 2.2.3
  
  
                               24 September 2017
  
  
                              Alexander Konovalov
  
                                  Steve Linton
  
  
  
  Alexander Konovalov
      Email:    mailto:alexander dot konovalov at st-andrews dot ac dot uk
      Homepage: http://www.cs.st-andrews.ac.uk/~alexk/
      Address:  School of Computer Science
                University of St Andrews
                Jack Cole Building, North Haugh,
                St Andrews, Fife, KY16 9SX, Scotland
  
  
  Steve Linton
      Email:    mailto:sal at cs dot st-andrews dot ac dot uk
      Homepage: http://www.cs.st-andrews.ac.uk/~sal/
      Address:  School of Computer Science
                University of St Andrews
                Jack Cole Building, North Haugh,
                St Andrews, Fife, KY16 9SX, Scotland
  
  
  
  -------------------------------------------------------
  Abstract
  The   GAP   package  SCSCP  implements  the  Symbolic  Computation  Software
  Composability  protocol  (http://www.symbolic-computing.org/scscp)  for  the
  computational algebra system GAP.
  
  
  -------------------------------------------------------
  Copyright
  © 2007-2017 by Alexander Konovalov and Steve Linton
  
  SCSCP  is  free software; you can redistribute it and/or modify it under the
  terms  of  the  GNU General Public License as published by the Free Software
  Foundation;  either  version 2 of the License, or (at your option) any later
  version.      For      details,      see      the     FSF's     own     site
  http://www.gnu.org/licenses/gpl.html.
  
  If you obtained SCSCP, we would be grateful for a short notification sent to
  one of the authors.
  
  If  you  publish  a  result  which  was partially obtained with the usage of
  SCSCP, please cite it in the following form:
  
  A.  Konovalov  and  S.  Linton.  SCSCP  ---  Symbolic  Computation  Software
  Composability          Protocol,         Version         2.2.3;         2017
  (https://gap-packages.github.io/scscp/).
  
  
  -------------------------------------------------------
  Acknowledgements
  The development of the SCSCP package has been supported by:
  
      EU  FP6  Programme  project  026133  SCIEnce  -  Symbolic  Computation
        Infrastructure for Europe (see http://www.symbolic-computing.org/).
  
      OpenDreamKit  Horizon  2020  European Research Infrastructures project
        #676541 (see http://opendreamkit.org/).
  
  
  -------------------------------------------------------
  Colophon
  Versions history:
  
      Version 0.1 - first half of 2007;
  
      Version 0.2 - December 2007;
  
      Version 0.3 - May 2008;
  
      Version 0.4 - August 2008;
  
      Version 1.0 - March 2009;
  
      Version 1.1 - May 2009;
  
      Version 1.2 - March 2010.
  
      Version 2.0 - October 2011.
  
      Version 2.1 - March 2012.
  
      Version 2.2 - February 2017.
  
  
  -------------------------------------------------------
  
  
  Contents (scscp)
  
  1 Preface
  2 Installation
    2.1 Installation and system requirements
    2.2 Configuration files
  3 Using streams
    3.1 Input-output TCP streams
      3.1-1 IsInputOutputTCPStream
      3.1-2 IsInputOutputTCPStreamRep
      3.1-3 InputOutputTCPStream
    3.2 Example of client-server communication via input-output TCP streams
  4 Message exchange by SCSCP
    4.1 Communication with the SCSCP server
      4.1-1 StartSCSCPsession
      4.1-2 OMPutProcedureCall
      4.1-3 SCSCPwait
      4.1-4 OMGetObjectWithAttributes
    4.2 Communication with the SCSCP client
      4.2-1 OMPutProcedureCompleted
      4.2-2 OMPutProcedureTerminated
    4.3 Example: SCSCP session
  5 Running SCSCP server
    5.1 Installation of SCSCP procedures
      5.1-1 InstallSCSCPprocedure
      5.1-2 OMsymRecord
    5.2 Starting SCSCP server
      5.2-1 RunSCSCPserver
    5.3 Procedures to get information about the SCSCP server
      5.3-1 GetServiceDescription
      5.3-2 GetAllowedHeads
      5.3-3 IsAllowedHead
      5.3-4 GetTransientCD
      5.3-5 GetSignature
  6 Client's functionality
    6.1 SCSCP connections
      6.1-1 IsSCSCPconnection
      6.1-2 NewSCSCPconnection
      6.1-3 CloseSCSCPconnection
    6.2 Processes
      6.2-1 IsProcess
      6.2-2 NewProcess
      6.2-3 CompleteProcess
      6.2-4 TerminateProcess
    6.3 All-in-one tool: sending request and getting result
      6.3-1 EvaluateBySCSCP
    6.4 Switching between Binary and XML OpenMath Encodings
      6.4-1 SwitchSCSCPmodeToBinary
    6.5 Remote objects
      6.5-1 StoreAsRemoteObjectPersistently
      6.5-2 IsRemoteObject
      6.5-3 RemoteObjectsFamily
      6.5-4 RetrieveRemoteObject
      6.5-5 UnbindRemoteObject
  7 Examples of SCSCP usage
    7.1 Providing services with the SCSCP package
    7.2 Identifying groups of order 512
  8 Parallel computing with SCSCP
    8.1 Managing multiple requests
      8.1-1 SynchronizeProcesses
      8.1-2 FirstProcess
      8.1-3 SCSCPservers
      8.1-4 ParQuickWithSCSCP
      8.1-5 FirstTrueProcess
    8.2 MasterWorker skeleton
      8.2-1 ParListWithSCSCP
      8.2-2 SCSCPreset
      8.2-3 SCSCPLogTracesToGlobal
    8.3 Example: parallelising Karatsuba multiplication for polynomials
  9 Service functions
    9.1 Pinging SCSCP servers
      9.1-1 PingSCSCPservice
      9.1-2 PingStatistic
    9.2 Info classes for SCSCP
      9.2-1 InfoSCSCP
      9.2-2 InfoMasterWorker
    9.3 Other SCSCP Utilities
      9.3-1 DateISO8601
      9.3-2 CurrentTimestamp
      9.3-3 Hostname
      9.3-4 MemoryUsageByGAPinKbytes
      9.3-5 LastReceivedCallID
      9.3-6 IO_PickleToString
      9.3-7 IO_UnpickleFromString