您是否需要使用互斥锁来锁定const？

Question

I am programming in go and using mutex lock to lock certain variables so they cannot be overwritten while being read.

This got me thinking. Since you can read a variable multiple times. Is there a scenario where you ever have to lock a constant variable?

Answer 1

The rule is simple: if multiple goroutines access a variable concurrently, and at least one of the accesses is a write, then synchronization is required.

If we talk about constants, then there is no variable, and you cannot take the address of a constant (for details, see Find address of constant in go), so it is not possible to modify constant values.

You do not need any synchronization to access constants from multiple goroutines.