Concurrent Hash Map in Go

main.go

package main

import (
	"fmt"
	"sync"
)

var (
	PROC_MAP = struct {
		sync.RWMutex
		m map[string]bool
	}{m: make(map[string]bool)}
)

func record(data string) {
	PROC_MAP.Lock()
	PROC_MAP.m[data] = true
	PROC_MAP.Unlock()
}

func verify(data string) bool {
	PROC_MAP.RLock()
	status := PROC_MAP.m[data]
	PROC_MAP.RUnlock()
	return status
}

func main() {

	record("bar")
	record("foo")

	done := make(chan bool)
	go func() {
		fmt.Println("Verify [bar]", verify("bar"))
		fmt.Println("Verify [foobar]", verify("foobar"))
		fmt.Println("Verify [foo]", verify("foo"))
		done <- true
	}()
	<-done
}