Java theory and practice: Managing volatility

Jun 19, 2007 ... Volatile variables in the Java language can be thought of as " synchronized lite";
they require less coding to use than synchronized blocks and often have less
runtime overhead, but they can only be used to do a subset of the things that
synchronized can. This article presents some patterns for using volatile ...

5 things you didn't know about ...: Multithreaded Java programming

Nov 9, 2010 ... In this installment of the 5 things series, I introduce some of the subtler aspects of
multithreaded programming with synchronized methods, volatile variables, and
atomic classes. My discussion focuses especially on how some of these
constructs interact with the JVM and Java compiler, and how the different ...

Java theory and practice: Fixing the Java Memory Model, Part 2

Mar 30, 2004 ... ... the Java Memory Model (JMM). In Part 1 of this series, columnist Brian Goetz
focused on some of the serious flaws that were found in the original JMM, which
resulted in some surprisingly difficult semantics for concepts that were supposed
to be simple. This month, he reveals how the semantics of volatile ...

Javaの理論と実践: volatile を扱う

2007年6月19日 ... Java 言語に元々含まれている同期機構として、synchronized ブロック (およびメソッド)
volatile 変数の 2 つがあります。どちらも、スレッド・セーフにコードを描画するために
提供されています。2 つのうち、volatile 変数の方が同期の仕組みとしては強力でない (
しかし場合によると、より単純、あるいはコストが安い) のですが、誤っ ...

JVM concurrency: Java and Scala concurrency basics

Mar 25, 2014 ... But the less-than-bulletproof initial specifications for sharing data among threads
occasioned major changes in the Java language update for Java 5 (JSR-133).
The Java Language Specification for Java 5 corrected and formalized the
operation of synchronized and volatile . The specification also spelled ...

dW:Java:Multithreaded Java programming:volatile vs threadlocal ...

hi guys, in what scenarios would you consider the use of threadlocal to be
superior to simply making the data volatile? is there performance benefits from
using volatile over threadlocal? any reason by this? Thanks in advance, Steven.
Log in to reply. Updated on Oct 3, 2007 at 5:32 AM by SystemAdmin.

Double-checked locking and the Singleton pattern

May 1, 2002 ... Double-checked locking is one such idiom in the Java programming language
that should never be used. In this article, Peter Haggar ... According to the JLS (
see Related topics), variables declared volatile are supposed to be sequentially
consistent, and therefore, not reordered. But two problems occur ...

Java theory and practice: Building a better HashMap

Aug 21, 2003 ... There are two language mechanisms for guaranteeing consistency of memory
operations across threads -- synchronized and volatile . According to the JLS, "In
the absence of explicit synchronization, an implementation is free to update the
main memory in an order that may be surprising." This means that ...

Java concurrency bug patterns for multicore systems

Dec 21, 2010 ... By studying concurrency bug patterns, you both increase your general
awareness of concurrency programming and learn to recognize coding idioms
that don't, or might not, work. In this article, authors Zhi Da Luo, Yarden Nir-
Buchbinder, and Raja Das unpack six lesser-known concurrency bugs that ...

dW:Java:Java filter:about volatile keyword - Java filter Forum

Re: about volatile keyword. Oct 28, 2004. This is the accepted answer. This is the
accepted answer. The volatile keyword is most typically used to ensure that
threads have the most current value of the variable. Threads may make copies of
instance variables; volatile makes certain the value is the same in ...

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