读者—写者问题(Readers-Writers problem)也是一个经典的并发程序设计问题,是经常出现的一种同步问题。计算机系统中的数据(文件、记录)常被多个进程共享,但其中某些进程可能只要求读数据(称为读者Reader);另一些进程则要求修改数据(称为写者Writer)。就共享数据而言,Reader和Writer是两组并发进程共享一组数据区,要求:
(1)允许多个读者同时执行读操作;
(2)不允许读者、写者同时操作;
(3)不允许多个写者同时操作。...
分类:
编程语言 时间:
2014-12-17 20:54:39
阅读次数:
221
Domino表单保存后,文档默认增加$Readers域的设置
【背景】
今天遇到一个奇怪的问题,一个表单一保存后,文档属性中会有一个$Readers域。查遍了各种资料无果。...
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其他好文 时间:
2014-12-10 19:54:39
阅读次数:
217
here is a great website:Learn to program by Chris Pine. This article assumes readers are all programming nebys. Of course I'm not, I skiped a lot:)The...
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其他好文 时间:
2014-11-13 23:46:53
阅读次数:
273
## 同步与异步 阻塞还是不阻塞,轮询还是事件驱动 Netty是事件驱动的 ## Buffer and Stream > Java has two kinds of classes for input and output (I/O): streams and readers/writers. Streams (InputStream, ...
分类:
编程语言 时间:
2014-11-11 11:01:56
阅读次数:
218
BACKGROUNDElectronic devices, such as electronic book readers ("eBook reader devices"), cellular telephones, portable media players, desktop computers...
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其他好文 时间:
2014-07-13 11:50:01
阅读次数:
271
As an introduction this chapter is aimed at readers who are familiar with the Web, HTTP, and Apache, but are not security experts. It is not intended ...
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其他好文 时间:
2014-06-21 15:08:28
阅读次数:
259
BACKGROUNDThe present invention relates generally to multithreaded programming and, more specifically, to mutual exclusion of readers and writers in a...
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其他好文 时间:
2014-06-19 00:28:09
阅读次数:
260
As an introduction this chapter is aimed at readers who are familiar with the Web, HTTP, and Apache, but are not security experts. It is not intended ...
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其他好文 时间:
2014-06-15 06:46:21
阅读次数:
219