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2021-11-24 16:09:25
33.9MB
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Shell脚本高级编程教程，希望对你有所帮助。
Example 10-23. Using continue N in an actual task：
1 # Albert Reiner gives an example of how to use "continue N":
2 # ---------------------------------------------------------
3
4 # Suppose I have a large number of jobs that need to be run, with
5 #+ any data that is to be treated in files of a given name pattern in a
6 #+ directory. There are several machines that access this directory, and
7 #+ I want to distribute the work over these different boxen. Then I
8 #+ usually nohup something like the following on every box:
9
10 while true
11 do
12 for n in .iso.*
13 do
14 [ "$n" = ".iso.opts" ] && continue
15 beta=${n#.iso.}
16 [ -r .Iso.$beta ] && continue
17 [ -r .lock.$beta ] && sleep 10 && continue
18 lockfile -r0 .lock.$beta || continue
19 echo -n "$beta: " `date`
20 run-isotherm $beta
21 date
22 ls -alF .Iso.$beta
23 [ -r .Iso.$beta ] && rm -f .lock.$beta
24 continue 2
25 done
26 break
27 done
28
29 # The details, in particular the sleep N, are particular to my
30 #+ application, but the general pattern is:
31
32 while true
33 do
34 for job in {pattern}
35 do
36 {job already done or running} && continue
37 {mark job as running, do job, mark job as done}
38 continue 2
39 done
40 break # Or something like `sleep 600' to avoid termination.
41 done
42
43 # This way the script will stop only when there are no more jobs to do
44 #+ (including jobs that were added during runtime). Through the use
45 #+ of appropriate lockfiles it can be run on several machines
46 #+ concurrently without duplication of calculations [which run a couple
47 #+ of hours in my case, so I really want to avoid this]. Also, as search
48 #+ always starts again from the beginning, one can encode priorities in
49 #+ the file names. Of course, one could also do this without `continue
2021-11-23 12:41:33
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☆ 资源说明：☆
[Wrox] C++ 多核高级编程 (英文版)
[Wrox] Professional Multicore Programming Design and Implementation for C++ Developers (E-Book)
☆ 出版信息：☆
[出版机构] Wrox
[出版日期] 2008年09月09日
[图书页数] 648页
[图书语言] 英语
[图书格式] PDF
-
[本书主要内容]
并发编程和同步带来的各种缺陷、陷阱和挑战
调试和测试多核编程的方法与技术
如何使川跨下台技术米利用处理器的特定特性
操作系统在多核编程中的任务
将框架类作为并发构建块加以利用的方法
如何通过使用接口类宋降低任务同步和通信的复杂性
本书适合于希望从事多核编程和多核应用程序开发的开发人员
本资料共包含以下附件：
[Wrox] Professional Multicore Programming Design and Implementation for C++ Developers.rar
2021-11-22 23:44:41
14.47MB
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