I don't use this package, so this question is just out of curiosity.
I would like to know "what" is "atomic", indeed.

I understand that an atomic operation will modify a 32 or 64 bits shared
variable with one machine instruction, and that no goroutine can see a
half-done modification.
So, "atomic" can mean that all bits are changed, or none of them.

But does "atomic" also mean that the change is immediately visible to other
goroutine ? or will the change only be visible to them "eventually" ?

Is the code below:

   var a int64

   atomic.AddInt64(&a, 1)

the same as:

   a += 1


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postedNov 21, '14 at 6:13p
activeNov 24, '14 at 7:45a



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