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The "Double-Checked Locking is Broken" Declaration

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Description: Details on the reasons - some very subtle - why double-checked locking cannot be relied upon to be safe. Signed by a number of experts, including Sun engineers.
The "Double-Checked Locking is Broken" Declaration The "Double-Checked Locking is Broken" Declaration (IBM Research) Joshua Bloch (Javasoft), , Cliff Click (Hotspot JVM project), Double-Checked Locking is widely cited and used as an efficient method for implementing lazy initialization in a multithreaded environment.
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