moby/vendor/golang.org/x/sync/syncmap/go19.go

// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build go1.9
// +build go1.9

package syncmap

import "sync" // home to the standard library's sync.map implementation as of Go 1.9

// Map is a concurrent map with amortized-constant-time loads, stores, and deletes.
// It is safe for multiple goroutines to call a Map's methods concurrently.
//
// The zero Map is valid and empty.
//
// A Map must not be copied after first use.
type Map = sync.Map