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javathread-safetygrammarbnfmodifier

"threadsafe" modifier in JAVA?

I just came across a BNF Grammar for JAVA. In it, "modifier" has a terminal symbol called "threadsafe". However, I have never seen it before and have not been able to locate that modifier in The Java Language Specification, Java SE 7 Edition (docs.oracle.com/javase/specs/jls/se7/jls7.pdf). Yet, I found it here, describing it in bullet 16 as:

If another thread excuting this code at the same time can not change the value of a variable then the variable is threadsafe and the compiler may do clever things with it to make the code faster or smaller.

Is this a real modifier? Is it supposed to be introduced in upcomming versions of JAVA?

Solution

  • Try to find it here, at the official source of Java BNF.