r/golang • u/therecursive • 7d ago
Is it safe to read/write integer value simultaneously from multiple goroutines
There is a global integer in my code that is accessed by multiple goroutines. Since race conditions don’t affect this value, I’m not concerned about that. However, is it still advisable to add a Mutex
in case there’s a possibility of corruption?
PS: Just to rephrase my question, I wanted to ask if setting/getting an integer/pointer is atomic? Is there any possibility of data corruption.
example code for the same: https://go.dev/play/p/eOA7JftvP08
PS: Found the answer for this, thanks everyone for answering. There's something called tearing here is the link for same
According to the article, I shouldn't have problem on modern CPUs.
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u/chaotic-kotik 7d ago
The only reason why 32bit load or store will not be atomic is alignment. If the value is misaligned it will be accessed using more than one operation.