2015-12-09 07:57:17 +00:00
<!DOCTYPE HTML>
< html lang = "zh-tw" >
< head >
< meta charset = "UTF-8" >
< meta http-equiv = "X-UA-Compatible" content = "IE=edge" / >
2015-12-31 08:20:27 +00:00
< title > Goroutines | Go语言圣经< / title >
2015-12-09 07:57:17 +00:00
< meta content = "text/html; charset=utf-8" http-equiv = "Content-Type" >
< meta name = "description" content = "" >
2016-01-02 08:04:45 +00:00
< meta name = "generator" content = "GitBook 2.6.6" >
2015-12-09 07:57:17 +00:00
< meta name = "HandheldFriendly" content = "true" / >
< meta name = "viewport" content = "width=device-width, initial-scale=1, user-scalable=no" >
< meta name = "apple-mobile-web-app-capable" content = "yes" >
< meta name = "apple-mobile-web-app-status-bar-style" content = "black" >
< link rel = "apple-touch-icon-precomposed" sizes = "152x152" href = "../gitbook/images/apple-touch-icon-precomposed-152.png" >
< link rel = "shortcut icon" href = "../gitbook/images/favicon.ico" type = "image/x-icon" >
< link rel = "stylesheet" href = "../gitbook/style.css" >
2015-12-28 08:08:26 +00:00
< link rel = "stylesheet" href = "../gitbook/plugins/gitbook-plugin-katex/katex.min.css" >
2015-12-09 07:57:17 +00:00
< link rel = "stylesheet" href = "../gitbook/plugins/gitbook-plugin-highlight/website.css" >
< link rel = "stylesheet" href = "../gitbook/plugins/gitbook-plugin-fontsettings/website.css" >
< link rel = "next" href = "../ch8/ch8-02.html" / >
< link rel = "prev" href = "../ch8/ch8.html" / >
< / head >
< body >
2016-01-02 08:04:45 +00:00
< div class = "book"
data-level="8.1"
data-chapter-title="Goroutines"
data-filepath="ch8/ch8-01.md"
data-basepath=".."
data-revision="Sat Jan 02 2016 16:00:23 GMT+0800 (中国标准时间)"
data-innerlanguage="">
2015-12-09 07:57:17 +00:00
< div class = "book-summary" >
< nav role = "navigation" >
< ul class = "summary" >
< li class = "chapter " data-level = "0" data-path = "index.html" >
< a href = "../index.html" >
< i class = "fa fa-check" > < / i >
前言
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "0.1" data-path = "ch0/ch0-01.html" >
< a href = "../ch0/ch0-01.html" >
< i class = "fa fa-check" > < / i >
< b > 0.1.< / b >
Go語言起源
< / a >
< / li >
< li class = "chapter " data-level = "0.2" data-path = "ch0/ch0-02.html" >
< a href = "../ch0/ch0-02.html" >
< i class = "fa fa-check" > < / i >
< b > 0.2.< / b >
Go語言項目
< / a >
< / li >
< li class = "chapter " data-level = "0.3" data-path = "ch0/ch0-03.html" >
< a href = "../ch0/ch0-03.html" >
< i class = "fa fa-check" > < / i >
< b > 0.3.< / b >
本書的組織
< / a >
< / li >
< li class = "chapter " data-level = "0.4" data-path = "ch0/ch0-04.html" >
< a href = "../ch0/ch0-04.html" >
< i class = "fa fa-check" > < / i >
< b > 0.4.< / b >
更多的信息
< / a >
< / li >
< li class = "chapter " data-level = "0.5" data-path = "ch0/ch0-05.html" >
< a href = "../ch0/ch0-05.html" >
< i class = "fa fa-check" > < / i >
< b > 0.5.< / b >
2015-12-21 04:55:18 +00:00
致謝
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "1" data-path = "ch1/ch1.html" >
< a href = "../ch1/ch1.html" >
< i class = "fa fa-check" > < / i >
< b > 1.< / b >
入門
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "1.1" data-path = "ch1/ch1-01.html" >
< a href = "../ch1/ch1-01.html" >
< i class = "fa fa-check" > < / i >
< b > 1.1.< / b >
Hello, World
< / a >
< / li >
< li class = "chapter " data-level = "1.2" data-path = "ch1/ch1-02.html" >
< a href = "../ch1/ch1-02.html" >
< i class = "fa fa-check" > < / i >
< b > 1.2.< / b >
命令行參數
< / a >
< / li >
< li class = "chapter " data-level = "1.3" data-path = "ch1/ch1-03.html" >
< a href = "../ch1/ch1-03.html" >
< i class = "fa fa-check" > < / i >
< b > 1.3.< / b >
2015-12-21 04:55:18 +00:00
査找重複的行
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "1.4" data-path = "ch1/ch1-04.html" >
< a href = "../ch1/ch1-04.html" >
< i class = "fa fa-check" > < / i >
< b > 1.4.< / b >
2015-12-21 04:55:18 +00:00
GIF動畵
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "1.5" data-path = "ch1/ch1-05.html" >
< a href = "../ch1/ch1-05.html" >
< i class = "fa fa-check" > < / i >
< b > 1.5.< / b >
2015-12-28 08:08:26 +00:00
獲取URL
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "1.6" data-path = "ch1/ch1-06.html" >
< a href = "../ch1/ch1-06.html" >
< i class = "fa fa-check" > < / i >
< b > 1.6.< / b >
2015-12-28 08:08:26 +00:00
併發獲取多個URL
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "1.7" data-path = "ch1/ch1-07.html" >
< a href = "../ch1/ch1-07.html" >
< i class = "fa fa-check" > < / i >
< b > 1.7.< / b >
Web服務
< / a >
< / li >
< li class = "chapter " data-level = "1.8" data-path = "ch1/ch1-08.html" >
< a href = "../ch1/ch1-08.html" >
< i class = "fa fa-check" > < / i >
< b > 1.8.< / b >
本章要點
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "2" data-path = "ch2/ch2.html" >
< a href = "../ch2/ch2.html" >
< i class = "fa fa-check" > < / i >
< b > 2.< / b >
程序結構
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "2.1" data-path = "ch2/ch2-01.html" >
< a href = "../ch2/ch2-01.html" >
< i class = "fa fa-check" > < / i >
< b > 2.1.< / b >
命名
< / a >
< / li >
< li class = "chapter " data-level = "2.2" data-path = "ch2/ch2-02.html" >
< a href = "../ch2/ch2-02.html" >
< i class = "fa fa-check" > < / i >
< b > 2.2.< / b >
聲明
< / a >
< / li >
< li class = "chapter " data-level = "2.3" data-path = "ch2/ch2-03.html" >
< a href = "../ch2/ch2-03.html" >
< i class = "fa fa-check" > < / i >
< b > 2.3.< / b >
變量
< / a >
< / li >
< li class = "chapter " data-level = "2.4" data-path = "ch2/ch2-04.html" >
< a href = "../ch2/ch2-04.html" >
< i class = "fa fa-check" > < / i >
< b > 2.4.< / b >
賦值
< / a >
< / li >
< li class = "chapter " data-level = "2.5" data-path = "ch2/ch2-05.html" >
< a href = "../ch2/ch2-05.html" >
< i class = "fa fa-check" > < / i >
< b > 2.5.< / b >
類型
< / a >
< / li >
< li class = "chapter " data-level = "2.6" data-path = "ch2/ch2-06.html" >
< a href = "../ch2/ch2-06.html" >
< i class = "fa fa-check" > < / i >
< b > 2.6.< / b >
包和文件
< / a >
< / li >
< li class = "chapter " data-level = "2.7" data-path = "ch2/ch2-07.html" >
< a href = "../ch2/ch2-07.html" >
< i class = "fa fa-check" > < / i >
< b > 2.7.< / b >
作用域
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "3" data-path = "ch3/ch3.html" >
< a href = "../ch3/ch3.html" >
< i class = "fa fa-check" > < / i >
< b > 3.< / b >
基礎數據類型
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "3.1" data-path = "ch3/ch3-01.html" >
< a href = "../ch3/ch3-01.html" >
< i class = "fa fa-check" > < / i >
< b > 3.1.< / b >
整型
< / a >
< / li >
< li class = "chapter " data-level = "3.2" data-path = "ch3/ch3-02.html" >
< a href = "../ch3/ch3-02.html" >
< i class = "fa fa-check" > < / i >
< b > 3.2.< / b >
浮點數
< / a >
< / li >
< li class = "chapter " data-level = "3.3" data-path = "ch3/ch3-03.html" >
< a href = "../ch3/ch3-03.html" >
< i class = "fa fa-check" > < / i >
< b > 3.3.< / b >
2015-12-21 04:55:18 +00:00
複數
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "3.4" data-path = "ch3/ch3-04.html" >
< a href = "../ch3/ch3-04.html" >
< i class = "fa fa-check" > < / i >
< b > 3.4.< / b >
2015-12-21 04:55:18 +00:00
布爾型
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "3.5" data-path = "ch3/ch3-05.html" >
< a href = "../ch3/ch3-05.html" >
< i class = "fa fa-check" > < / i >
< b > 3.5.< / b >
字符串
< / a >
< / li >
< li class = "chapter " data-level = "3.6" data-path = "ch3/ch3-06.html" >
< a href = "../ch3/ch3-06.html" >
< i class = "fa fa-check" > < / i >
< b > 3.6.< / b >
常量
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "4" data-path = "ch4/ch4.html" >
< a href = "../ch4/ch4.html" >
< i class = "fa fa-check" > < / i >
< b > 4.< / b >
2015-12-21 04:55:18 +00:00
複合數據類型
2015-12-09 07:57:17 +00:00
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "4.1" data-path = "ch4/ch4-01.html" >
< a href = "../ch4/ch4-01.html" >
< i class = "fa fa-check" > < / i >
< b > 4.1.< / b >
數組
< / a >
< / li >
< li class = "chapter " data-level = "4.2" data-path = "ch4/ch4-02.html" >
< a href = "../ch4/ch4-02.html" >
< i class = "fa fa-check" > < / i >
< b > 4.2.< / b >
2015-12-31 08:20:27 +00:00
Slice
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "4.3" data-path = "ch4/ch4-03.html" >
< a href = "../ch4/ch4-03.html" >
< i class = "fa fa-check" > < / i >
< b > 4.3.< / b >
2015-12-31 08:20:27 +00:00
Map
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "4.4" data-path = "ch4/ch4-04.html" >
< a href = "../ch4/ch4-04.html" >
< i class = "fa fa-check" > < / i >
< b > 4.4.< / b >
結構體
< / a >
< / li >
< li class = "chapter " data-level = "4.5" data-path = "ch4/ch4-05.html" >
< a href = "../ch4/ch4-05.html" >
< i class = "fa fa-check" > < / i >
< b > 4.5.< / b >
JSON
< / a >
< / li >
< li class = "chapter " data-level = "4.6" data-path = "ch4/ch4-06.html" >
< a href = "../ch4/ch4-06.html" >
< i class = "fa fa-check" > < / i >
< b > 4.6.< / b >
文本和HTML模闆
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "5" data-path = "ch5/ch5.html" >
< a href = "../ch5/ch5.html" >
< i class = "fa fa-check" > < / i >
< b > 5.< / b >
函數
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "5.1" data-path = "ch5/ch5-01.html" >
< a href = "../ch5/ch5-01.html" >
< i class = "fa fa-check" > < / i >
< b > 5.1.< / b >
函數聲明
< / a >
< / li >
< li class = "chapter " data-level = "5.2" data-path = "ch5/ch5-02.html" >
< a href = "../ch5/ch5-02.html" >
< i class = "fa fa-check" > < / i >
< b > 5.2.< / b >
遞歸
< / a >
< / li >
< li class = "chapter " data-level = "5.3" data-path = "ch5/ch5-03.html" >
< a href = "../ch5/ch5-03.html" >
< i class = "fa fa-check" > < / i >
< b > 5.3.< / b >
多返迴值
< / a >
< / li >
< li class = "chapter " data-level = "5.4" data-path = "ch5/ch5-04.html" >
< a href = "../ch5/ch5-04.html" >
< i class = "fa fa-check" > < / i >
< b > 5.4.< / b >
錯誤
< / a >
< / li >
< li class = "chapter " data-level = "5.5" data-path = "ch5/ch5-05.html" >
< a href = "../ch5/ch5-05.html" >
< i class = "fa fa-check" > < / i >
< b > 5.5.< / b >
函數值
< / a >
< / li >
< li class = "chapter " data-level = "5.6" data-path = "ch5/ch5-06.html" >
< a href = "../ch5/ch5-06.html" >
< i class = "fa fa-check" > < / i >
< b > 5.6.< / b >
匿名函數
< / a >
< / li >
< li class = "chapter " data-level = "5.7" data-path = "ch5/ch5-07.html" >
< a href = "../ch5/ch5-07.html" >
< i class = "fa fa-check" > < / i >
< b > 5.7.< / b >
可變參數
< / a >
< / li >
< li class = "chapter " data-level = "5.8" data-path = "ch5/ch5-08.html" >
< a href = "../ch5/ch5-08.html" >
< i class = "fa fa-check" > < / i >
< b > 5.8.< / b >
Deferred函數
< / a >
< / li >
< li class = "chapter " data-level = "5.9" data-path = "ch5/ch5-09.html" >
< a href = "../ch5/ch5-09.html" >
< i class = "fa fa-check" > < / i >
< b > 5.9.< / b >
Panic異常
< / a >
< / li >
< li class = "chapter " data-level = "5.10" data-path = "ch5/ch5-10.html" >
< a href = "../ch5/ch5-10.html" >
< i class = "fa fa-check" > < / i >
< b > 5.10.< / b >
2015-12-28 08:08:26 +00:00
Recover捕獲異常
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "6" data-path = "ch6/ch6.html" >
< a href = "../ch6/ch6.html" >
< i class = "fa fa-check" > < / i >
< b > 6.< / b >
方法
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "6.1" data-path = "ch6/ch6-01.html" >
< a href = "../ch6/ch6-01.html" >
< i class = "fa fa-check" > < / i >
< b > 6.1.< / b >
方法聲明
< / a >
< / li >
< li class = "chapter " data-level = "6.2" data-path = "ch6/ch6-02.html" >
< a href = "../ch6/ch6-02.html" >
< i class = "fa fa-check" > < / i >
< b > 6.2.< / b >
2015-12-21 04:55:18 +00:00
基於指針對象的方法
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "6.3" data-path = "ch6/ch6-03.html" >
< a href = "../ch6/ch6-03.html" >
< i class = "fa fa-check" > < / i >
< b > 6.3.< / b >
通過嵌入結構體來擴展類型
< / a >
< / li >
< li class = "chapter " data-level = "6.4" data-path = "ch6/ch6-04.html" >
< a href = "../ch6/ch6-04.html" >
< i class = "fa fa-check" > < / i >
< b > 6.4.< / b >
2015-12-21 04:55:18 +00:00
方法值和方法表達式
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "6.5" data-path = "ch6/ch6-05.html" >
< a href = "../ch6/ch6-05.html" >
< i class = "fa fa-check" > < / i >
< b > 6.5.< / b >
示例: Bit數組
< / a >
< / li >
< li class = "chapter " data-level = "6.6" data-path = "ch6/ch6-06.html" >
< a href = "../ch6/ch6-06.html" >
< i class = "fa fa-check" > < / i >
< b > 6.6.< / b >
封裝
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "7" data-path = "ch7/ch7.html" >
< a href = "../ch7/ch7.html" >
< i class = "fa fa-check" > < / i >
< b > 7.< / b >
接口
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "7.1" data-path = "ch7/ch7-01.html" >
< a href = "../ch7/ch7-01.html" >
< i class = "fa fa-check" > < / i >
< b > 7.1.< / b >
2015-12-21 04:55:18 +00:00
接口是合約
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "7.2" data-path = "ch7/ch7-02.html" >
< a href = "../ch7/ch7-02.html" >
< i class = "fa fa-check" > < / i >
< b > 7.2.< / b >
接口類型
< / a >
< / li >
< li class = "chapter " data-level = "7.3" data-path = "ch7/ch7-03.html" >
< a href = "../ch7/ch7-03.html" >
< i class = "fa fa-check" > < / i >
< b > 7.3.< / b >
實現接口的條件
< / a >
< / li >
< li class = "chapter " data-level = "7.4" data-path = "ch7/ch7-04.html" >
< a href = "../ch7/ch7-04.html" >
< i class = "fa fa-check" > < / i >
< b > 7.4.< / b >
flag.Value接口
< / a >
< / li >
< li class = "chapter " data-level = "7.5" data-path = "ch7/ch7-05.html" >
< a href = "../ch7/ch7-05.html" >
< i class = "fa fa-check" > < / i >
< b > 7.5.< / b >
接口值
< / a >
< / li >
< li class = "chapter " data-level = "7.6" data-path = "ch7/ch7-06.html" >
< a href = "../ch7/ch7-06.html" >
< i class = "fa fa-check" > < / i >
< b > 7.6.< / b >
sort.Interface接口
< / a >
< / li >
< li class = "chapter " data-level = "7.7" data-path = "ch7/ch7-07.html" >
< a href = "../ch7/ch7-07.html" >
< i class = "fa fa-check" > < / i >
< b > 7.7.< / b >
http.Handler接口
< / a >
< / li >
< li class = "chapter " data-level = "7.8" data-path = "ch7/ch7-08.html" >
< a href = "../ch7/ch7-08.html" >
< i class = "fa fa-check" > < / i >
< b > 7.8.< / b >
error接口
< / a >
< / li >
< li class = "chapter " data-level = "7.9" data-path = "ch7/ch7-09.html" >
< a href = "../ch7/ch7-09.html" >
< i class = "fa fa-check" > < / i >
< b > 7.9.< / b >
2015-12-21 04:55:18 +00:00
示例: 表達式求值
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "7.10" data-path = "ch7/ch7-10.html" >
< a href = "../ch7/ch7-10.html" >
< i class = "fa fa-check" > < / i >
< b > 7.10.< / b >
類型斷言
< / a >
< / li >
< li class = "chapter " data-level = "7.11" data-path = "ch7/ch7-11.html" >
< a href = "../ch7/ch7-11.html" >
< i class = "fa fa-check" > < / i >
< b > 7.11.< / b >
2015-12-21 04:55:18 +00:00
基於類型斷言識别錯誤類型
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "7.12" data-path = "ch7/ch7-12.html" >
< a href = "../ch7/ch7-12.html" >
< i class = "fa fa-check" > < / i >
< b > 7.12.< / b >
通過類型斷言査詢接口
< / a >
< / li >
< li class = "chapter " data-level = "7.13" data-path = "ch7/ch7-13.html" >
< a href = "../ch7/ch7-13.html" >
< i class = "fa fa-check" > < / i >
< b > 7.13.< / b >
類型分支
< / a >
< / li >
< li class = "chapter " data-level = "7.14" data-path = "ch7/ch7-14.html" >
< a href = "../ch7/ch7-14.html" >
< i class = "fa fa-check" > < / i >
< b > 7.14.< / b >
示例: 基於標記的XML解碼
< / a >
< / li >
< li class = "chapter " data-level = "7.15" data-path = "ch7/ch7-15.html" >
< a href = "../ch7/ch7-15.html" >
< i class = "fa fa-check" > < / i >
< b > 7.15.< / b >
補充幾點
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "8" data-path = "ch8/ch8.html" >
< a href = "../ch8/ch8.html" >
< i class = "fa fa-check" > < / i >
< b > 8.< / b >
Goroutines和Channels
< / a >
< ul class = "articles" >
< li class = "chapter active" data-level = "8.1" data-path = "ch8/ch8-01.html" >
< a href = "../ch8/ch8-01.html" >
< i class = "fa fa-check" > < / i >
< b > 8.1.< / b >
Goroutines
< / a >
< / li >
< li class = "chapter " data-level = "8.2" data-path = "ch8/ch8-02.html" >
< a href = "../ch8/ch8-02.html" >
< i class = "fa fa-check" > < / i >
< b > 8.2.< / b >
2015-12-21 04:55:18 +00:00
示例: 併發的Clock服務
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "8.3" data-path = "ch8/ch8-03.html" >
< a href = "../ch8/ch8-03.html" >
< i class = "fa fa-check" > < / i >
< b > 8.3.< / b >
2015-12-21 04:55:18 +00:00
示例: 併發的Echo服務
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "8.4" data-path = "ch8/ch8-04.html" >
< a href = "../ch8/ch8-04.html" >
< i class = "fa fa-check" > < / i >
< b > 8.4.< / b >
Channels
< / a >
< / li >
< li class = "chapter " data-level = "8.5" data-path = "ch8/ch8-05.html" >
< a href = "../ch8/ch8-05.html" >
< i class = "fa fa-check" > < / i >
< b > 8.5.< / b >
併行的循環
< / a >
< / li >
< li class = "chapter " data-level = "8.6" data-path = "ch8/ch8-06.html" >
< a href = "../ch8/ch8-06.html" >
< i class = "fa fa-check" > < / i >
< b > 8.6.< / b >
2015-12-21 04:55:18 +00:00
示例: 併發的Web爬蟲
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "8.7" data-path = "ch8/ch8-07.html" >
< a href = "../ch8/ch8-07.html" >
< i class = "fa fa-check" > < / i >
< b > 8.7.< / b >
2015-12-21 04:55:18 +00:00
基於select的多路複用
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "8.8" data-path = "ch8/ch8-08.html" >
< a href = "../ch8/ch8-08.html" >
< i class = "fa fa-check" > < / i >
< b > 8.8.< / b >
2015-12-21 04:55:18 +00:00
示例: 併發的字典遍歷
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "8.9" data-path = "ch8/ch8-09.html" >
< a href = "../ch8/ch8-09.html" >
< i class = "fa fa-check" > < / i >
< b > 8.9.< / b >
2015-12-28 08:08:26 +00:00
併發的退出
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "8.10" data-path = "ch8/ch8-10.html" >
< a href = "../ch8/ch8-10.html" >
< i class = "fa fa-check" > < / i >
< b > 8.10.< / b >
示例: 聊天服務
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "9" data-path = "ch9/ch9.html" >
< a href = "../ch9/ch9.html" >
< i class = "fa fa-check" > < / i >
< b > 9.< / b >
2015-12-21 04:55:18 +00:00
基於共享變量的併發
2015-12-09 07:57:17 +00:00
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "9.1" data-path = "ch9/ch9-01.html" >
< a href = "../ch9/ch9-01.html" >
< i class = "fa fa-check" > < / i >
< b > 9.1.< / b >
競爭條件
< / a >
< / li >
< li class = "chapter " data-level = "9.2" data-path = "ch9/ch9-02.html" >
< a href = "../ch9/ch9-02.html" >
< i class = "fa fa-check" > < / i >
< b > 9.2.< / b >
sync.Mutex互斥鎖
< / a >
< / li >
< li class = "chapter " data-level = "9.3" data-path = "ch9/ch9-03.html" >
< a href = "../ch9/ch9-03.html" >
< i class = "fa fa-check" > < / i >
< b > 9.3.< / b >
sync.RWMutex讀寫鎖
< / a >
< / li >
< li class = "chapter " data-level = "9.4" data-path = "ch9/ch9-04.html" >
< a href = "../ch9/ch9-04.html" >
< i class = "fa fa-check" > < / i >
< b > 9.4.< / b >
2015-12-21 04:55:18 +00:00
內存同步
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "9.5" data-path = "ch9/ch9-05.html" >
< a href = "../ch9/ch9-05.html" >
< i class = "fa fa-check" > < / i >
< b > 9.5.< / b >
sync.Once初始化
< / a >
< / li >
< li class = "chapter " data-level = "9.6" data-path = "ch9/ch9-06.html" >
< a href = "../ch9/ch9-06.html" >
< i class = "fa fa-check" > < / i >
< b > 9.6.< / b >
競爭條件檢測
< / a >
< / li >
< li class = "chapter " data-level = "9.7" data-path = "ch9/ch9-07.html" >
< a href = "../ch9/ch9-07.html" >
< i class = "fa fa-check" > < / i >
< b > 9.7.< / b >
2015-12-21 04:55:18 +00:00
示例: 併發的非阻塞緩存
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "9.8" data-path = "ch9/ch9-08.html" >
< a href = "../ch9/ch9-08.html" >
< i class = "fa fa-check" > < / i >
< b > 9.8.< / b >
2015-12-21 04:55:18 +00:00
Goroutines和線程
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "10" data-path = "ch10/ch10.html" >
< a href = "../ch10/ch10.html" >
< i class = "fa fa-check" > < / i >
< b > 10.< / b >
包和工具
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "10.1" data-path = "ch10/ch10-01.html" >
< a href = "../ch10/ch10-01.html" >
< i class = "fa fa-check" > < / i >
< b > 10.1.< / b >
簡介
< / a >
< / li >
< li class = "chapter " data-level = "10.2" data-path = "ch10/ch10-02.html" >
< a href = "../ch10/ch10-02.html" >
< i class = "fa fa-check" > < / i >
< b > 10.2.< / b >
導入路徑
< / a >
< / li >
< li class = "chapter " data-level = "10.3" data-path = "ch10/ch10-03.html" >
< a href = "../ch10/ch10-03.html" >
< i class = "fa fa-check" > < / i >
< b > 10.3.< / b >
包聲明
< / a >
< / li >
< li class = "chapter " data-level = "10.4" data-path = "ch10/ch10-04.html" >
< a href = "../ch10/ch10-04.html" >
< i class = "fa fa-check" > < / i >
< b > 10.4.< / b >
導入聲明
< / a >
< / li >
< li class = "chapter " data-level = "10.5" data-path = "ch10/ch10-05.html" >
< a href = "../ch10/ch10-05.html" >
< i class = "fa fa-check" > < / i >
< b > 10.5.< / b >
匿名導入
< / a >
< / li >
< li class = "chapter " data-level = "10.6" data-path = "ch10/ch10-06.html" >
< a href = "../ch10/ch10-06.html" >
< i class = "fa fa-check" > < / i >
< b > 10.6.< / b >
包和命名
< / a >
< / li >
< li class = "chapter " data-level = "10.7" data-path = "ch10/ch10-07.html" >
< a href = "../ch10/ch10-07.html" >
< i class = "fa fa-check" > < / i >
< b > 10.7.< / b >
工具
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "11" data-path = "ch11/ch11.html" >
< a href = "../ch11/ch11.html" >
< i class = "fa fa-check" > < / i >
< b > 11.< / b >
測試
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "11.1" data-path = "ch11/ch11-01.html" >
< a href = "../ch11/ch11-01.html" >
< i class = "fa fa-check" > < / i >
< b > 11.1.< / b >
go test
< / a >
< / li >
< li class = "chapter " data-level = "11.2" data-path = "ch11/ch11-02.html" >
< a href = "../ch11/ch11-02.html" >
< i class = "fa fa-check" > < / i >
< b > 11.2.< / b >
測試函數
< / a >
< / li >
< li class = "chapter " data-level = "11.3" data-path = "ch11/ch11-03.html" >
< a href = "../ch11/ch11-03.html" >
< i class = "fa fa-check" > < / i >
< b > 11.3.< / b >
測試覆蓋率
< / a >
< / li >
< li class = "chapter " data-level = "11.4" data-path = "ch11/ch11-04.html" >
< a href = "../ch11/ch11-04.html" >
< i class = "fa fa-check" > < / i >
< b > 11.4.< / b >
基準測試
< / a >
< / li >
< li class = "chapter " data-level = "11.5" data-path = "ch11/ch11-05.html" >
< a href = "../ch11/ch11-05.html" >
< i class = "fa fa-check" > < / i >
< b > 11.5.< / b >
剖析
< / a >
< / li >
< li class = "chapter " data-level = "11.6" data-path = "ch11/ch11-06.html" >
< a href = "../ch11/ch11-06.html" >
< i class = "fa fa-check" > < / i >
< b > 11.6.< / b >
示例函數
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "12" data-path = "ch12/ch12.html" >
< a href = "../ch12/ch12.html" >
< i class = "fa fa-check" > < / i >
< b > 12.< / b >
反射
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "12.1" data-path = "ch12/ch12-01.html" >
< a href = "../ch12/ch12-01.html" >
< i class = "fa fa-check" > < / i >
< b > 12.1.< / b >
2015-12-21 04:55:18 +00:00
爲何需要反射?
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "12.2" data-path = "ch12/ch12-02.html" >
< a href = "../ch12/ch12-02.html" >
< i class = "fa fa-check" > < / i >
< b > 12.2.< / b >
reflect.Type和reflect.Value
< / a >
< / li >
< li class = "chapter " data-level = "12.3" data-path = "ch12/ch12-03.html" >
< a href = "../ch12/ch12-03.html" >
< i class = "fa fa-check" > < / i >
< b > 12.3.< / b >
Display遞歸打印
< / a >
< / li >
< li class = "chapter " data-level = "12.4" data-path = "ch12/ch12-04.html" >
< a href = "../ch12/ch12-04.html" >
< i class = "fa fa-check" > < / i >
< b > 12.4.< / b >
2015-12-21 04:55:18 +00:00
示例: 編碼S表達式
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "12.5" data-path = "ch12/ch12-05.html" >
< a href = "../ch12/ch12-05.html" >
< i class = "fa fa-check" > < / i >
< b > 12.5.< / b >
通過reflect.Value脩改值
< / a >
< / li >
< li class = "chapter " data-level = "12.6" data-path = "ch12/ch12-06.html" >
< a href = "../ch12/ch12-06.html" >
< i class = "fa fa-check" > < / i >
< b > 12.6.< / b >
2015-12-21 04:55:18 +00:00
示例: 解碼S表達式
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "12.7" data-path = "ch12/ch12-07.html" >
< a href = "../ch12/ch12-07.html" >
< i class = "fa fa-check" > < / i >
< b > 12.7.< / b >
2015-12-28 08:08:26 +00:00
獲取結構體字段標識
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "chapter " data-level = "12.8" data-path = "ch12/ch12-08.html" >
< a href = "../ch12/ch12-08.html" >
< i class = "fa fa-check" > < / i >
< b > 12.8.< / b >
顯示一個類型的方法集
< / a >
< / li >
< li class = "chapter " data-level = "12.9" data-path = "ch12/ch12-09.html" >
< a href = "../ch12/ch12-09.html" >
< i class = "fa fa-check" > < / i >
< b > 12.9.< / b >
幾點忠告
< / a >
< / li >
< / ul >
< / li >
< li class = "chapter " data-level = "13" data-path = "ch13/ch13.html" >
< a href = "../ch13/ch13.html" >
< i class = "fa fa-check" > < / i >
< b > 13.< / b >
底層編程
< / a >
< ul class = "articles" >
< li class = "chapter " data-level = "13.1" data-path = "ch13/ch13-01.html" >
< a href = "../ch13/ch13-01.html" >
< i class = "fa fa-check" > < / i >
< b > 13.1.< / b >
unsafe.Sizeof, Alignof 和 Offsetof
< / a >
< / li >
< li class = "chapter " data-level = "13.2" data-path = "ch13/ch13-02.html" >
< a href = "../ch13/ch13-02.html" >
< i class = "fa fa-check" > < / i >
< b > 13.2.< / b >
unsafe.Pointer
< / a >
< / li >
< li class = "chapter " data-level = "13.3" data-path = "ch13/ch13-03.html" >
< a href = "../ch13/ch13-03.html" >
< i class = "fa fa-check" > < / i >
< b > 13.3.< / b >
示例: 深度相等判斷
< / a >
< / li >
< li class = "chapter " data-level = "13.4" data-path = "ch13/ch13-04.html" >
< a href = "../ch13/ch13-04.html" >
< i class = "fa fa-check" > < / i >
< b > 13.4.< / b >
通過cgo調用C代碼
< / a >
< / li >
< li class = "chapter " data-level = "13.5" data-path = "ch13/ch13-05.html" >
< a href = "../ch13/ch13-05.html" >
< i class = "fa fa-check" > < / i >
< b > 13.5.< / b >
幾點忠告
< / a >
< / li >
< / ul >
< / li >
2015-12-24 06:47:06 +00:00
< li class = "chapter " data-level = "14" data-path = "CONTRIBUTORS.html" >
2015-12-09 07:57:17 +00:00
2015-12-24 06:47:06 +00:00
< a href = "../CONTRIBUTORS.html" >
2015-12-09 07:57:17 +00:00
< i class = "fa fa-check" > < / i >
2015-12-21 04:55:18 +00:00
< b > 14.< / b >
2015-12-09 07:57:17 +00:00
2015-12-24 06:47:06 +00:00
附録
2015-12-09 07:57:17 +00:00
< / a >
< / li >
< li class = "divider" > < / li >
< li >
< a href = "https://www.gitbook.com" target = "blank" class = "gitbook-link" >
本書使用 GitBook 釋出
< / a >
< / li >
< / ul >
< / nav >
< / div >
< div class = "book-body" >
< div class = "body-inner" >
< div class = "book-header" role = "navigation" >
<!-- Actions Left -->
<!-- Title -->
< h1 >
< i class = "fa fa-circle-o-notch fa-spin" > < / i >
2015-12-31 08:20:27 +00:00
< a href = "../" > Go语言圣经< / a >
2015-12-09 07:57:17 +00:00
< / h1 >
< / div >
< div class = "page-wrapper" tabindex = "-1" role = "main" >
< div class = "page-inner" >
< section class = "normal" id = "section-" >
< h2 id = "81-goroutines" > 8.1. Goroutines< / h2 >
2015-12-28 08:08:26 +00:00
< p > 在 Go語 言 中 ， 每 一 個 併 發 的 執 行 單 元 叫 作 一 個 goroutine。 設 想 這 里 有 一 個 程 序 有 兩 個 函 數 ， 一 個 函 數 做 一 些 計 算 ， 另 一 個 輸 出 一 些 結 果 ， 假 設 兩 個 函 數 沒 有 相 互 之 間 的 調 用 關 繫 。 一 個 線 性 的 程 序 會 先 調 用 其 中 的 一 個 函 數 ， 然 後 再 調 用 來 一 個 ， 但 如 果 是 在 有 兩 個 甚 至 更 多 個 goroutine的 程 序 中 ， 對 兩 個 函 數 的 調 用 就 可 以 在 同 一 時 間 。 我 們 馬 上 就 會 看 到 這 樣 的 一 個 程 序 。 < / p >
< p > 如 果 你 使 用 過 操 作 繫 統 或 者 其 它 語 言 提 供 的 線 程 ， 那 麽 你 可 以 簡 單 地 把 goroutine類 比 作 一 個 線 程 ， 這 樣 你 就 可 以 寫 出 一 些 正 確 的 程 序 了 。 goroutine和 線 程 的 本 質 區 别 會 在 9.8節 中 講 。 < / p >
2015-12-21 04:55:18 +00:00
< p > 當 一 個 程 序 啟 動 時 ， 其 主 函 數 卽 在 一 個 單 獨 的 goroutine中 運 行 ， 我 們 叫 它 main goroutine。 新 的 goroutine會 用 go語 句 來 創 建 。 在 語 法 上 ， go語 句 是 一 個 普 通 的 函 數 或 方 法 調 用 前 加 上 關 鍵 字 go。 go語 句 會 使 其 語 句 中 的 函 數 在 一 個 新 創 建 的 goroutine中 運 行 。 而 go語 句 本 身 會 迅 速 地 完 成 。 < / p >
2015-12-09 07:57:17 +00:00
< pre > < code class = "lang-go" > f() < span class = "hljs-comment" > // call f(); wait for it to return< / span >
< span class = "hljs-keyword" > go< / span > f() < span class = "hljs-comment" > // create a new goroutine that calls f(); don' t wait< / span >
< / code > < / pre >
2015-12-21 04:55:18 +00:00
< p > 在 下 面 的 例 子 中 ， main goroutine會 計 算 第 45個 菲 波 那 契 數 。 由 於 計 算 函 數 使 用 了 效 率 非 常 低 的 遞 歸 ， 所 以 會 運 行 相 當 可 觀 的 一 段 時 間 ， 在 這 期 間 我 們 想 要 讓 用 戶 看 到 一 個 可 見 的 標 識 來 表 明 程 序 依 然 在 正 常 運 行 ， 所 以 顯 示 一 個 動 畵 的 小 圖 標 ： < / p >
2015-12-09 07:57:17 +00:00
< pre > < code class = "lang-go" > gopl.io/ch8/spinner
< span class = "hljs-keyword" > func< / span > main() {
< span class = "hljs-keyword" > go< / span > spinner(< span class = "hljs-number" > 100< / span > * time.Millisecond)
< span class = "hljs-keyword" > const< / span > n = < span class = "hljs-number" > 45< / span >
fibN := fib(n) < span class = "hljs-comment" > // slow< / span >
fmt.Printf(< span class = "hljs-string" > " \rFibonacci(%d) = %d\n" < / span > , n, fibN)
}
< span class = "hljs-keyword" > func< / span > spinner(delay time.Duration) {
< span class = "hljs-keyword" > for< / span > {
< span class = "hljs-keyword" > for< / span > _, r := < span class = "hljs-keyword" > range< / span > < span class = "hljs-string" > `-\|/`< / span > {
fmt.Printf(< span class = "hljs-string" > " \r%c" < / span > , r)
time.Sleep(delay)
}
}
}
< span class = "hljs-keyword" > func< / span > fib(x < span class = "hljs-typename" > int< / span > ) < span class = "hljs-typename" > int< / span > {
< span class = "hljs-keyword" > if< / span > x < < span class = "hljs-number" > 2< / span > {
< span class = "hljs-keyword" > return< / span > x
}
< span class = "hljs-keyword" > return< / span > fib(x-< span class = "hljs-number" > 1< / span > ) + fib(x-< span class = "hljs-number" > 2< / span > )
}
< / code > < / pre >
2015-12-21 04:55:18 +00:00
< p > 動 畵 顯 示 了 幾 秒 之 後 ， fib(45)的 調 用 成 功 地 返 迴 ， 併 且 打 印 結 果 ：
2015-12-09 07:57:17 +00:00
Fibonacci(45) = 1134903170< / p >
2015-12-28 08:08:26 +00:00
< p > 然 後 主 函 數 返 迴 。 當 主 函 數 返 迴 時 ， 所 有 的 goroutine都 會 直 接 打 斷 ， 程 序 退 出 。 除 了 從 主 函 數 退 出 或 者 直 接 退 出 程 序 之 外 ， 沒 有 其 它 的 編 程 方 法 能 夠 讓 一 個 goroutine來 打 斷 另 一 個 的 執 行 ， 但 是 我 們 之 後 可 以 看 到 ， 可 以 通 過 goroutine之 間 的 通 信 來 讓 一 個 goroutine請 求 請 求 其 它 的 goroutine， 併 讓 其 自 己 結 束 執 行 。 < / p >
2015-12-21 04:55:18 +00:00
< p > 註 意 這 里 的 兩 個 獨 立 的 單 元 是 如 何 進 行 組 合 的 ， spinning和 菲 波 那 契 的 計 算 。 每 一 個 都 是 寫 在 獨 立 的 函 數 中 ， 但 是 每 一 個 函 數 都 會 併 發 地 執 行 。 < / p >
2015-12-09 07:57:17 +00:00
< / section >
< / div >
< / div >
< / div >
< a href = "../ch8/ch8.html" class = "navigation navigation-prev " aria-label = "Previous page: Goroutines和Channels" > < i class = "fa fa-angle-left" > < / i > < / a >
2015-12-21 04:55:18 +00:00
< a href = "../ch8/ch8-02.html" class = "navigation navigation-next " aria-label = "Next page: 示例: 併發的Clock服務" > < i class = "fa fa-angle-right" > < / i > < / a >
2015-12-09 07:57:17 +00:00
< / div >
< / div >
< script src = "../gitbook/app.js" > < / script >
< script src = "../gitbook/plugins/gitbook-plugin-sharing/buttons.js" > < / script >
< script src = "../gitbook/plugins/gitbook-plugin-fontsettings/buttons.js" > < / script >
< script >
require(["gitbook"], function(gitbook) {
2015-12-28 08:08:26 +00:00
var config = {"katex":{},"highlight":{},"sharing":{"facebook":true,"twitter":true,"google":false,"weibo":false,"instapaper":false,"vk":false,"all":["facebook","google","twitter","weibo","instapaper"]},"fontsettings":{"theme":"white","family":"sans","size":2}};
2015-12-09 07:57:17 +00:00
gitbook.start(config);
});
< / script >
< / body >
< / html >
