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Full Discussion: Atomicity
Top Forums Programming Atomicity Post 51097 by S.P.Prasad on Tuesday 11th of May 2004 01:33:28 AM
Old 05-11-2004
Please visit the link within this post.

_check_lock and _clear_lock on AIX


I tested the code implementing the routines and the code behaves fine in Unit testing.

Also if someone can explain me in detail "The word variable must be aligned on a full word boundary." as stated in the page. Please correct me if I am worng - "A group of related bytes that are treated as a single addressable unit or entity in memory is called as a WORD. Hence size of a word varies from one computer to another, depending on the CPU. For computers with a 16-bit CPU, a word is 16 bits (2 bytes)."

Single Word = Single addressable unit by CPU
Word Boundary = Address completely divisible by number of bytes that represents a single addressable unit.

Example Single Word length = 16 bits then a word boundary is any address that is completely divisible by 16, which would mean that the variable referenced here should begin at 0,16,32,48,64 ... and so on memory locations and the variable should consume 16 bits of memory.

Am I correct? What extra care should I take into account during coding?

Please let me know whether these are a proven set of standard 'C' routines. Please let me know your honest opinions before I put it into the production system and have a go.

Thanks in advance

Last edited by S.P.Prasad; 05-11-2004 at 05:11 AM..
 
PPI::Token::Word(3)					User Contributed Perl Documentation				       PPI::Token::Word(3)

NAME
PPI::Token::Word - The generic "word" Token INHERITANCE
PPI::Token::Word isa PPI::Token isa PPI::Element DESCRIPTION
A "PPI::Token::Word" object is a PPI-specific representation of several different types of word-like things, and is one of the most common Token classes found in typical documents. Specifically, it includes not only barewords, but also any other valid Perl identifier including non-operator keywords and core functions, and any include "::" separators inside it, as long as it fits the format of a class, function, etc. METHODS
There are no methods available for "PPI::Token::Word" beyond those provided by its PPI::Token and PPI::Element parent classes. We expect to add additional methods to help further resolve a Word as a function, method, etc over time. If you need such a thing right now, look at Perl::Critic::Utils. literal Returns the value of the Word as a string. This assumes (often incorrectly) that the Word is a bareword and not a function, method, keyword, etc. This differs from "content" because "Foo'Bar" expands to "Foo::Bar". method_call Answers whether this is the name of a method in a method call. Returns true if yes, false if no, and nothing if unknown. TO DO
- Add "function", "method" etc detector methods SUPPORT
See the support section in the main module. AUTHOR
Adam Kennedy <adamk@cpan.org> COPYRIGHT
Copyright 2001 - 2011 Adam Kennedy. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. The full text of the license can be found in the LICENSE file included with this module. perl v5.18.2 2011-02-25 PPI::Token::Word(3)
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