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Which of the following is an atomic operation?

 
azuki ooh
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(a) temp = temp + 1;
(b) X = temp;
(c) int temp = X;

I read somewhere that assignment operation are atomic. Incremental operation is not. So I conclude that (c) is atomic. Am I right?
 
Henry Wong
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azuki ooh wrote:(a) temp = temp + 1;
(b) X = temp;
(c) int temp = X;

I read somewhere that assignment operation are atomic. Incremental operation is not. So I conclude that (c) is atomic. Am I right?


Yes, C is definitely atomic. B may also be atomic, depending on the data type and the JVM. Also, there are other issues, such as register caching. Atomic doesn't mean thread safe.

Henry
 
azuki ooh
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Thanks!
 
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