M.S. / Computer Science & Engineering / Programming in a multiprocessing environment creates additional complexity issues above those encountered in a uniprocessing model. Animation of the underlying software data structures has been shown to help in management of such issues in uniprocessing environments. Animation tools for multiprocessing environments should also be of assistance to software engineers constructing parallel processing software systems. MPA is an environment that supports creation ofanimations that support multiprocessing applications in the Smalltalk programming environment.

Thesis (M.S.)--Oregon Graduate Center, 1988.

M.S. / Computer Science & Engineering / QUICKTALK is a dialect of Smalltalk-80 that can be compiled directly into native machine code, instead of virtual machine bytecodes. The dialect includes "hints" on the class of method arguments, instance variables, and class variables. The dialect is designed to describe primitive Smalltalk methods. Improved performance over bytecodes is achieved by eliminating the interpreter loop on bytecode execution, by reducing the number of message send/returns via binding some target methods at compilation, and by eliminating redundant class checking. Changes to the Smalltalk- 80 system and compiler to support the dialect are identified and performance measurements are given.

Thesis (M.S.)--Rochester Institute of Technology, 1984. / Typescript. Includes bibliographical references and appendices.

Thesis (Ph. D.) Oregon Graduate Center.

A number of essential issues in translating Smalltalk to Java are addressed. The fIrst chapter gives a brief overview of Smalltalk and Java with respect to the relevant language features that will be translated. In the next section a convention is proposed for mapping Smalltalk method selectors to Java method names. The dynamic nature of Smalltalk instance methods is compared with Java's static type model as well as a solution to simulate the dynamic nature of Smalltalk in Java. A Java class hierarchy that parallels the Smalltalk class hierarchy (including the metaclass objects) is suggested. A further proposal is given for translating the dynamic attributes of Smalltalk class methods to the same behaviour to Java. These proposals are used to support ways of mapping both Smalltalk instance methods, as well as Smalltalk class methods to their Java counterparts. Ways of translating Smalltalk class variables, Smalltalk class instance variables and Smalltalk global variables are illustrated. A method for translating Smalltalk blocks to Java inner classes is implemented using Java exceptions to unwind the call stack. Various types of Small talk blocks are translated with increasing complexity. The various types of blocks translated are simple blocks; blocks with references to variables in the enclosing context; blocks with block arguments; blocks that need to refer to their own context executed from other contexts; blocks with multiple exit points as well as nested blocks. Some performance tests to illustrate the impact of using exceptions in Java are also reported. The next section introduces the Small talk grammar with the necessary productions used to implement a parser. Lexical and syntax analysis are explained. A brief overview of a recursive descent parser is given where an example of Smalltalk source code is parsed and all the relevant parse nodes illustrated. The encoding in each parse node to Java source is shown. The last section focuses on similar initiatives being pursued and compares the solutions in the dissertation against them. This dissertation focuses on key areas of the Smalltalk to Java translation process, but a few peculiar and unique Smalltalk features are not addressed. These are discussed in the last section and some suggestions are made on how the translations can be achieved. / Dissertation (MSc (Computer Science))--University of Pretoria, 2006. / Computer Science / unrestricted