eBook - pdf - Manning - 2013 - The Well-Grounded Java Developer.pdf

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Vital techniques of Java 7 and

polyglot programming

The

Benjamin J. Evans

Martijn Verburg

OREWORD BY

Dr. Heinz Kabutz

MANNING

www.it-ebooks.info

RULES OF THE JAVA MEMORY MODEL

Example of Synchronizes-With

JMM has the following rules:

■

An unlock operation on a monitor Synchronizes-With later lock operations

A write to a volatile variable Synchronizes-With later reads of the variable

If an action A Synchronizes-With action B, then A Happens-Before B

If A comes before B in program order within a thread, then A Happens-Before B