From 100434.3031@CompuServe.COM Thu Jul 18 13:03:26 1996 Received: from arl-img-5.compuserve.com (arl-img-5.compuserve.com [149.174.217.135]) by dkuug.dk (8.6.12/8.6.12) with ESMTP id NAA10252 for ; Thu, 18 Jul 1996 13:03:23 +0200 Received: by arl-img-5.compuserve.com (8.6.10/5.950515) id HAA18570; Thu, 18 Jul 1996 07:02:45 -0400 Date: 18 Jul 96 07:01:13 EDT From: Jean Stride <100434.3031@CompuServe.COM> To: ISO/IEC JTC 1/SC 24 Subject: (SC22docs.73) Document SC22 N2203 Message-ID: <960718110112_100434.3031_BHG127-1@CompuServe.COM> Please note that this document will be issued as an SC 24 document - this is an advance copy ISO/IEC JTC 1/SC22 Programming languages, their environments and system software interfaces Secretariat: U.S.A. (ANSI) ISO/IEC JTC 1/SC22 N2203 July 1996 TITLE: SC22/WG21 Response to SC24/WG6 Liaison Statement SOURCE: Secretariat, ISO/IEC JTC 1/SC22 WORK ITEM: N/A STATUS: N/A CROSS REFERENCE: SC22 N2194 DOCUMENT TYPE: Response to Liaison Statement ACTION: To SC22 Member Bodies for information. Address reply to: ISO/IEC JTC 1/SC22 Secretariat William C. Rinehuls 8457 Rushing Creek Court Springfield, VA 22153 USA Tel: +1 (703) 912-9680 Fax: +1 (703) 912-2973 email: rinehuls@access.digex.net ________________________________________________________________________ Subject: WG21 N0961: response to SC24/WG6 liason stmt WG21 acknowledges the liason statement from SC 24/WG 6 (SC 24/N 1577== SC 22/WG 21/N 0960) and thanks the authors for their contribution. The statement was distributed and discussed at WG21's Stockholm meeting on 7-Jul-96. Mr. Karl Soop also attended the meeting on behalf of SC 24/WG 6, and explained the background of the liason statement. The provision of support for concurrency in C++ has been discussed within WG21. Various implementations of C++ have provided concurrency in several forms. A recently published book from MIT Press(*) lists 18 different implementations of concurrency in C++, some involving language extensions and others using library facilities. The implementations have different capabilities and purposes. Although it would clearly be a benefit to the programming community, an attempt to agree on one concurrency facility for all C++ programmers would be difficult at this time. The C++ standard is now at the CD stage, and no national body has requested the addition of concurrency support in their CD ballot comments. Therefore, WG21 feels it would be inappropriate to take on the task of adding such support as part of its current standard, even as an informative annex. Of course, such a facility could be proposed later as an adendum or a technical report. If the facility were implemented as an optional library, it could also be advanced by another working group, e.g., SC 24/WG 6. Mr. Dag Bruck (dag@dynasim.se), a representative of Sweden to WG21, has volunteered to be the point of contact should WG6 wish to continue to discuss the technical details of their proposal. (*) Mr. Bruck will be able to supply the exact reference to this book.