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单片机与4*4按键接口程序，C语言代码，简单使用。
单片机与4*4按键接口程序，C语言代码，简单使用。-SCM and 4* 4 keypad interface program, C language code, simple to use.
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A user
A user-space device driver can do many of the things that kernel drivers can t, such as perform a long-running computation, block while waiting for an event, or read files from the file system. Unlike kernel drivers, a user-space device driver can use other device drivers--that is, access the network, talk to a serial port, get interactive input from the user, pop up GUI windows, or read from disks. User-space drivers implemented using FUSD can be much easier to debug it is impossible for them to crash the machine, are easily traceable using tools such as gdb, and can be killed and restarted without rebooting even if they become corrupted. FUSD drivers don t have to be in C--Perl, Python, or any other language that knows how to read from and write to a file descriptor can work with FUSD. User-space drivers can be swapped out, whereas kernel drivers lock physical memory.-A user-space device driver can do many of the things that kernel drivers can t, such as perform a long-running comput
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dgdf g豆腐干 反对广泛生生世世 事实
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通过研究Linux的线程机制和信号量实现读者写者(Reader
通过研究Linux的线程机制和信号量实现读者写者(Reader-Writer)问题并发控制。
1)写-写互斥：不能有两个写者同时进行写操作；
2）读-写互斥：不能同时有一个线程在读，而另一个线程在写；
3）读-读允许：可以有一个或多个读者在读；
4）读者优先的附加限制：如果读者申请进行读操作时已有另一个读者正在进行读操作，则该读者可直接开始读操作；
5）写者优先的附加限制：如果一个读者申请进行读操作时已有另一个写者在等待访问共享资源，则该读者必须等到没有写者处于等待状态后才能开始读操作。
-By studying the Linux thread mechanism and semaphores realize readers who write (Reader-Writer) the issue of concurrency control. 1) to write- write mutex: Can not write at the same time there are two write operations 2) read- write mutex: Can not have a thread at the same time in reading and writing another thread 3) Reading- Reading of permit: can have one or more readers read 4) the priority of additional restrictions readers: If the readers apply for a read operation, there was another reader being read, the reader can be directly started reading operation 5) to write additional priority Restrictions: If an application for a reader reading write operation has been in waiting for another visit to a shared resource, the read
- 2022-02-06 09:26:49下载
- 积分：1
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An operatin system writin with C ,with read/write support for FAT12 file system
An operatin system writin with C ,with read/write support for FAT12 file system-An operatin system writin with C ,with read/write support for FAT12 file system
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DustFS 文件系统实现源码，研究文件系统的朋友可以下载参考！...
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bankers algorithm examples
银行家算法的实例-bankers algorithm examples
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于渊《自己动手写操作系统》源代码及相关工具
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生产者和消费者
生产者和消费者实验代码，主要是为了应付操作系统实验而选择的代码。希望可以帮助到大家顺利完成实验吧，不挂科。代码有相应的注释，大家应该看得懂。代码的环境是VC6.0就可以编译，很方便。好了，大家有兴趣就下载来用用吧。
- 2022-12-01 10:45:03下载
- 积分：1
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磁盘调度算法实现
资源描述实现了磁盘调度，希望可以帮助同学们解决问题
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