《Operating System Concepts》學習第 10 天，p62-p75 總結，總計 14 頁。

一、技術總結

1.  system call

(1)  定義

The primary interface between processes and the operating system, providing a means to invoke services made available by the operating system.

(2)  類型

System calls can be grouped roughly into six major categories: process control, file management, device management, information maintenance, communications, and protection。

2.  interprocess communication

(1)  分類

There are two common models of interprocess communication: the message-

passing model and the shared-memory model.

二、英語總結(生詞：3)

1.rewind

(1)rewind: re-("again") + wind("to turn, to twist")
vi/vt. go back to the beginning, move back to the start.
示例：We may also read(), write(), or reposition() (rewind or skip to the end of the file, for example)(《Operating System Concepts》第 71 頁)。

2.exclusive

(1)exclusive:ex-("out, away") + claudere("to close, to shout out")
adj. exclusive refers to sth is limited, restricted or not shared with others--it implies that others are shut out or excluded。常見的用法有：exclusive use(專用), exclusiver access(獨占式訪問), exclusive right(專有權)。
示例：A system with multiple users may require us to first request() a device, to ensure exclusive use of it(《Operating System Concepts》第 72 頁)。
(2)exclusive vs privileged
exclusive 強調 restriction or sole access(not shared or available to others), privileged 強調 special advantage or benefit(having something valuable or favorable)。

3.eligible

(1)eligible: e-("out, from") + legere("to choose")
adj. able to choosen(有資格的)。
示例：In this section, we describe the steps in this procedure, from compiling a program to placing it in memory, where it becomes eligible to run on an available CPU core(《Operating System Concepts》第 75 頁)。

關于英語的注解同步更新匯總到 https://github.com/codists/English-In-CS-Books 倉庫。

三、其它

看了還不能實際地去運用是最讓人痛苦的，更痛苦的是這兩天有一個面試因為算法掛了，看來算法是繞不過去的門檻，今年打算再開一個算法的坑。

四、參考資料

1. 編程

(1) Abraham Silberschatz，Peter Baer Galvin，Greg Gagne《Operating System Concepts》：https://book.douban.com/subject/30272539/

2. 英語

(1) Etymology Dictionary：https://www.etymonline.com

(2) Cambridge Dictionary：https://dictionary.cambridge.org

歡迎搜索及關注：編程人(a_codists)