About: Quaject     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : owl:Thing, within Data Space : dbpedia.demo.openlinksw.com associated with source document(s)
QRcode icon
http://dbpedia.demo.openlinksw.com/describe/?url=http%3A%2F%2Fdbpedia.org%2Fresource%2FQuaject

In computer science, a quaject is an object-like data structure containing both data and code (or pointers to code), exposed as an interface in the form of callentries, and can accept a list of callentries to other quajects for callbacks and callouts. They were developed by Alexia Massalin in 1989 for the Synthesis kernel, and named for the Qua! Machine, a unique hardware platform built by Massalin. The origin of the term 'qua' is unclear; Massalin claims humorously that it is a sound made by koalas.

AttributesValues
rdfs:label
  • Quaject (en)
rdfs:comment
  • In computer science, a quaject is an object-like data structure containing both data and code (or pointers to code), exposed as an interface in the form of callentries, and can accept a list of callentries to other quajects for callbacks and callouts. They were developed by Alexia Massalin in 1989 for the Synthesis kernel, and named for the Qua! Machine, a unique hardware platform built by Massalin. The origin of the term 'qua' is unclear; Massalin claims humorously that it is a sound made by koalas. (en)
dcterms:subject
Wikipage page ID
Wikipage revision ID
Link from a Wikipage to another Wikipage
sameAs
dbp:wikiPageUsesTemplate
has abstract
  • In computer science, a quaject is an object-like data structure containing both data and code (or pointers to code), exposed as an interface in the form of callentries, and can accept a list of callentries to other quajects for callbacks and callouts. They were developed by Alexia Massalin in 1989 for the Synthesis kernel, and named for the Qua! Machine, a unique hardware platform built by Massalin. The origin of the term 'qua' is unclear; Massalin claims humorously that it is a sound made by koalas. The main purpose of quajects is to provide an abstraction to manage self-modifying code, by allowing runtime code optimizing on a per-object basis. While the original Synthesis kernel required quajects to be written in hand-developed assembly language, this was done to avoid developing a complex compiler; Massalin noted that just-in-time compilation (JIT) for a high-level programming language that permits runtime code generation, as in Lisp or Smalltalk, can also apply this approach, though she also asserted that the complexity of such a compiler was likely to be prohibitive. Quajects differ from more conventional objects in two key ways: first, they always use a form of the dependency injection pattern to manage both interfaces to other quajects, and continuations out of the quaject; the list of callentry references for this is part of quaject creation, and may be updated during the quaject's lifetime. Second, and more critically, a given quaject's set of methods can be unique to the specific quaject; methods for a type or class of quajects are stored as one or more templates, rather than as fixed code. While shared methods can be accessed through a common table of pointers, individual quajects can also have methods that are generated specifically to tailor the performance for that quaject's behavior. (en)
prov:wasDerivedFrom
page length (characters) of wiki page
foaf:isPrimaryTopicOf
is Link from a Wikipage to another Wikipage of
is foaf:primaryTopic of
Faceted Search & Find service v1.17_git139 as of Feb 29 2024


Alternative Linked Data Documents: ODE     Content Formats:   [cxml] [csv]     RDF   [text] [turtle] [ld+json] [rdf+json] [rdf+xml]     ODATA   [atom+xml] [odata+json]     Microdata   [microdata+json] [html]    About   
This material is Open Knowledge   W3C Semantic Web Technology [RDF Data] Valid XHTML + RDFa
OpenLink Virtuoso version 08.03.3330 as of Mar 19 2024, on Linux (x86_64-generic-linux-glibc212), Single-Server Edition (378 GB total memory, 59 GB memory in use)
Data on this page belongs to its respective rights holders.
Virtuoso Faceted Browser Copyright © 2009-2024 OpenLink Software