With atomic.Pointer one can make an atomic pointer to a known type using generics. A func() is essentially already a pointer but is not part of the * syntax so it can't go into the atomic.Pointer. Closest usable data structure seems to be atomic.Value but it's very unergonomic. Is there a readily available tool that I'm missing?

With atomic.Pointer one can make an atomic pointer to a known type using generics. A func() is essentially already a pointer but is not part of the * syntax so it can't go into the atomic.Pointer. Closest usable data structure seems to be atomic.Value but it's very unergonomic. Is there a readily available tool that I'm missing?

• go
• concurrency
• atomic

• I realize now that slices and maps have the exact same ergonomics problem. – Ayberk Özgür Commented Mar 21 at 13:48
• 1 Although function values are implemented as a pointer, there's nothing in the language specification that requires this implementation. Slices contain a pointer, but are not pointers themselves. There is not an ergonomic problem to solve with these types. – Thundercat Commented Mar 21 at 14:56

1 Answer 1

func() can't go into atomic.Pointer, but *func() can.

f := func() {
    fmt.Println("hello world")
}
p := atomic.Pointer[func()]{}
p.Store(&f)
g := p.Load()
(*g)()