May 2006
Intermediate to advanced
432 pages
12h 21m
English
book
Java Concurrency in Practice
by Brian Goetz, Tim Peierls, Joshua Bloch, Joseph Bowbeer, David Holmes, Doug Lea
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Chapter 16. The Java Memory Model
Throughout this book, we've mostly avoided the low-level details of the Java Memory Model (JMM) and instead focused on higher-level design issues such as safe publication, specification of, and adherence to synchronization policies. These derive their safety from the JMM, and you may find it easier to use these mechanisms effectively when you understand why they work. This chapter pulls back the curtain to reveal the low-level requirements and guarantees of the Java Memory Model and the reasoning behind some of the higher-level design rules offered in this book.
16.1. What is a Memory Model, and Why would I Want One?
Suppose one thread assigns a value to aVariable:
aVariable = 3;
A memory model addresses the ...