在goroutine中使用指针接收器

Question

I have a method with a pointer receiver, I was wondering if using this pointer receiver is safe to use inside a goroutine within this method? or should I pass this pointer receiver as a parameter?

for example:

func (m *dummyStruct) doSomething {
    /* do a bunch of stuff */
    go func() {
        m.a = x
        m.doSomethingElse()
    }()
    return y
}

I know that I can not go wrong by passing m as a parameter to the goroutine but I was wondering if it is extremely necessary

Answer 1

If you are modifying state of m, you'll need a mutex lock and careful locking patterns.

Other than that, this will increase context switching across your thread boundries under most circumstances.

This is why we have the Go idiom:

Do not communicate by sharing memory; instead, share memory by communicating.

https://blog.golang.org/share-memory-by-communicating