package main

import (
    "fmt2"
    "sync"
)

type Container struct {
    counters map[string]int
    mu       sync.Mutex
}


func (c *Container) inc(name string) {

    c.mu.Lock()
    defer c.mu.Unlock()
    c.counters[name] +=100
}


func sync_map() {
    var m sync.Map

    m.Store(2, "b")
    v, ok := m.LoadOrStore(1, "a")
    v2, ok2 := m.Load(1)
    assert(v == "a")
    assert(!ok)
    assert(v2 == "a")
    assert(ok2)
    fmt2.Println(v, ok, v2, ok2)
    fmt2.Println(m)
    m.Delete(2)
    v3, _ := m.Load(2)
    fmt2.Println(m, v3)
    assert(v3 == nil)
    

}


func main() {

    sync_map()

    /*
    c := Container{

        counters: map[string]int{"a": 0, "b": 0},
    }
    c.inc("aaa")

    go c.inc("aaa")


    fmt2.Println(c.counters)
    for i := 0; i < 10000; i++ {
        
    }
    fmt2.Println(c.counters)

    fmt2.Println()
    */
}