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// Copyright 2012 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.

package sync_test

import (
	"fmt"
	"sync"
)

type httpPkg struct{}

func (httpPkg) Get(url string) {}

var http httpPkg

// This example fetches several URLs concurrently,
// using a WaitGroup to block until all the fetches are complete.
func ExampleWaitGroup() {
	var wg sync.WaitGroup
	var urls = []string{
		"http://www.golang.org/",
		"http://www.google.com/",
		"http://www.example.com/",
	}
	for _, url := range urls {
		// Increment the WaitGroup counter.
		wg.Add(1)
		// Launch a goroutine to fetch the URL.
		go func(url string) {
			// Decrement the counter when the goroutine completes.
			defer wg.Done()
			// Fetch the URL.
			http.Get(url)
		}(url)
	}
	// Wait for all HTTP fetches to complete.
	wg.Wait()
}

func ExampleOnce() {
	var once sync.Once
	onceBody := func() {
		fmt.Println("Only once")
	}
	done := make(chan bool)
	for i := 0; i < 10; i++ {
		go func() {
			once.Do(onceBody)
			done <- true
		}()
	}
	for i := 0; i < 10; i++ {
		<-done
	}
	// Output:
	// Only once
}

Batal

⬅ src 27 item

Nama	Tipe	Ukuran	Diubah	Aksi
📁atomic	dir	—	2024-02-02 18:09	📂 Buka
🔵cond.go	go	4 KB	2024-02-02 18:09	✏️ 👁️
🔵cond_test.go	go	5 KB	2024-02-02 18:09	✏️ 👁️
🔵example_pool_test.go	go	1017 B	2024-02-02 18:09	✏️ 👁️
🔵example_test.go	go	1.1 KB	2024-02-02 18:09	✏️ 👁️
🔵export_test.go	go	1.2 KB	2024-02-02 18:09	✏️ 👁️
🔵map.go	go	15 KB	2024-02-02 18:09	✏️ 👁️
🔵map_bench_test.go	go	11.2 KB	2024-02-02 18:09	✏️ 👁️
🔵map_reference_test.go	go	5.4 KB	2024-02-02 18:09	✏️ 👁️
🔵map_test.go	go	6.7 KB	2024-02-02 18:09	✏️ 👁️
🔵mutex.go	go	8.3 KB	2024-02-02 18:09	✏️ 👁️
🔵mutex_test.go	go	5.9 KB	2024-02-02 18:09	✏️ 👁️
🔵once.go	go	2.4 KB	2024-02-02 18:09	✏️ 👁️
🔵once_test.go	go	1.1 KB	2024-02-02 18:09	✏️ 👁️
🔵oncefunc.go	go	2 KB	2024-02-02 18:09	✏️ 👁️
🔵oncefunc_test.go	go	6.9 KB	2024-02-02 18:09	✏️ 👁️
🔵pool.go	go	9 KB	2024-02-02 18:09	✏️ 👁️
🔵pool_test.go	go	8.1 KB	2024-02-02 18:09	✏️ 👁️
🔵poolqueue.go	go	8.7 KB	2024-02-02 18:09	✏️ 👁️
🔵runtime.go	go	2.3 KB	2024-02-02 18:09	✏️ 👁️
🔵runtime2.go	go	465 B	2024-02-02 18:09	✏️ 👁️
🔵runtime2_lockrank.go	go	546 B	2024-02-02 18:09	✏️ 👁️
🔵runtime_sema_test.go	go	1.3 KB	2024-02-02 18:09	✏️ 👁️
🔵rwmutex.go	go	7 KB	2024-02-02 18:09	✏️ 👁️
🔵rwmutex_test.go	go	4.9 KB	2024-02-02 18:09	✏️ 👁️
🔵waitgroup.go	go	3.9 KB	2024-02-02 18:09	✏️ 👁️
🔵waitgroup_test.go	go	3 KB	2024-02-02 18:09	✏️ 👁️

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