Q is a software bus supporting RPCs and message passing
Date/Time of Processing: Monday 30 May 1994 04:54:32Pm Overall Assessment of System: OK Classification of System: C Basis of Classification -- Syntax Errors PASS Completeness PASS Independence from External Libraries FAIL Independence from a Specific Ada Compiler FAIL Explanations for failures -- System withs non-standard library units that are not provided System contains compiler-specific pragmas or uses Machine_Code Number of ... Files 19 Library Units 22 Lines 3052 Statements 1093 Comments 795 Unidentified Withed Units -- 6 unidentified withed units
languages/ada/distproc/q: File Name Size --------- ---- README 1,949 q.zip 324,687 Totals ============== ============== 2 Files 326,636
ASSET_A_503: Q - An Ada-C Interprocess Communication Support Utility, V. 3.2 Q is a software bus system used as part of the ARPA sponsored Arcadia project. Q provides both remote procedure call (RPC) and message-passing semantics as a layer above Unix sockets. It uses the Open Network Computing (ONC) industrial standard. Q supports several important capabilities: 1. Multi-language support: both embedding and interoperability. 2. ONC RPC compatibility. 3. Version of XDR for Ada. 4. Implementation of clients and servers is orthogonal to their mapping to Unix processes. This means that a single Unix process can contain arbitrary collections of clients and servers. 5. Q extends the existing ONC remote procedure-call (RPC) paradigm to allow more flexible control: a. Out-of-order replies by server. b. Message passing (mix and match with RPC). c. Exception returns with associated value. d. Acknowledgement of request from servers to clients. e. Continuation by server tasks after replying to a request. f. Connection failure notification. g. Priority service requests. h. User definable authorization mechanisms. i. Interprocess callback support. Additionally, Q provides a set of matched C and Ada interfaces designed to support interprocess communication between these two languages. Certain of these adaptations were necessitated by the lack of key C language features in the Ada language. Additional features were inspired by language features present in the Ada language which are not commonly found in C language implementations. Q defines an interprocess communication model common to both languages, and a type space common to both languages. In order to construct Q, you will also need the Arpc support package. Arpc is a re-engineered version of the publically available Sun ONC RPC/XDR, version 4.0.
01 August 1993 3.2g Release to ASSET 14 January 1994 3.2g Initial release to the PAL
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