rtos programming

Multiprocessing Module Introduction The multithreading in Python does not take advantage of multicore, and if you want to fully use the resources of multicore CPUs (Os.cpu_count () Viewing), most of the situations in Python require multiple processes. Python provides the multiprocessing. The multiprocessing module is used to open sub-processes and perform our custom tasks (such as functions) in the subprocess, which is similar to the programming inter

The diagram shows a framework for how to organize memory in a typical C + + program. The instructions in the program (which are stored at the bottom level) and global variables are often stored statically (static area), which is located at the beginning of the near machine address space where the address number is smaller. The amount of memory allocated in the zone does not change during program operation.The highest address area in memory represents the stack area. When your program calls a fun

Learning QT Programming, sometimes we want to make good-looking and relatively cool picture, then we often use some of the skills of QT. Here I have a small example to show the QT techniques, this QT programming, as shown: (Remove the title bar and set the window after transparent) QQ Mini version of the network chat software detailed in QT programming-my QQ (LAN

In November 2014, the author wrote a: based on the C programming language, how to Keil software in the modular programming document , and upload to Baidu Library. And in May this year, the content of the document was updated and perfected. In the beginning to practice programming friends a reference, send this blog, to facilitate more friends to see. If you reade

For reasons of interest, in recent years, especially in some open source architecture or projects to learn a bit of experience or methods worth learning. Think about it, always good reputation in Unix should have something worth learning. I found the English version of the UNIX programming art, it was too slow to read a day, and eventually turned to the Chinese version. Summarize some of the principles or knowledge that you think are more useful to me

Because PROCFS's default action function uses only one page of caching, it is troublesome to handle large proc files, and is less flexible when outputting data from a series of structures, and needs to implement iterations in the Read_proc function, which is prone to bugs. So the kernel hackers have done some research on the/proc code, abstracting the commonality, and eventually formed the Seq_file (Sequence file: Sequence files) interface. This interface provides a simple set of functions to so

the application's buffer. The read call is blocked, usually because the data on the sending end is not reached. two. Blocking (default) and Nonblock mode read/write behavior difference: Setting socket FD to Nonblock (non-blocking) is a common practice in server programming where the pattern of using blocking IO and creating a thread for each client is costly and scalable (with a lot of switching overhead), and more generally, a thread pool + Nonblock

;"]. Or back to the code,result = Env->newobjectarray (size, intarrcls, NULL);The function is to allocate space for result. Jintarray Iarr = env->newintarray (size);is to allocate space for a one-dimensional int array Iarr. Env->setintarrayregion (Iarr, 0, size, TMP);is to assign a value to the Iarr. Env->setobjectarrayelement (result, I, Iarr);is to assign a value to the first element of result. With these steps, we create a two-dimensional int array and assign the value so that we can return i

Introduction to a simple programming language With computer hardware and software knowledge background of the programmer, understand the computer CPU composition and how to manage memory, assembly language is running in the CPU, the compiler language and interpretation of language implementation principles, common data structure, getting started new programming language barrier is not too big. First of al

Shanxin: The Enlightenment teacher on the Memory programming road(http://news.csdn.net/n/20080908/118821.html) Liu Tie: The Physics Teacher's program introductory course(http://news.csdn.net/n/20080908/118828.html) Moyu: "Programming, starting with a simple start"(http://news.csdn.net/n/20080908/118827.html) Hu Rui: "Thanks to Zhu Zhontao, Tsinghua University computer Department"(http://news.csdn.net/n/2

So you want to program.You may have heard of the C language, java,c++ these "daunting" nouns. It's good to watch the IT elites on the computer screen and you dream of being like them. But how to get started.Please don't expect me to start teaching you how to use C + + to make a popular global game. I can tell you this is a very good language, but it is not suitable for beginners, this sentence I know not to say, but I have seen too many students because of the choice of C + + as the starter lang

Some time ago, this article on csdn tired of programming books. To try these 3 interesting ways to improve your programming skills, see a very interesting website: http://www.codewars.com/dashboard You can do some programming exercises on it, often by completing a small method or function, and now it supports languages such as Ruby, JavaScript, and Coffeescript,