robocall blocking device

Transferred from: http://blog.csdn.net/yikai2009/article/details/8653697Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.Directory (?) [-] Blocking Blocking operations Non-blocking operation Blocking mode-read-implementation

blocking and non-blocking IO in Linux device drivers:Blocking and non-blocking in 1.Linux device drivers Summary: http://m.blog.csdn.net/blog/dongteen/17264501Blocking and non-blocking io:http://m.blog.csdn.net/blog/dongteen/17264

Today accidentally received a message, really shocked me, blog Xuan sent me a message, said it is my blog article has characteristics can be out of the book, this simply let me flattered, I just a junior technical house, write blog is also some of their own learning ideas and in the Internet to see some of my blog post and the comprehensive write, In short this gives the additional impetus, lets oneself move forward, hoped and everybody can share some own experience, in the most needs the strugg

In the previous study of network programming, I have learned I/O model Linux System application Programming-network programming (I/O model), below to learn the I/O model in the device driver application.Recall that there are five types of I/O models under Unix/linux, namely:A--blocking I/OB--Non-blocking I/OC--I/O multiplexing (SELECT and poll)D--signal-driven I/

/** * Author:hasen * Reference: Linux device Driver Development Details * Introduction: Android Small rookie Linux * device driver Development Learning Journey * Topic: blocking and non-blocking I/o * date:2014-11-05 * * Blocking An action is when a

A blocking operation means that when a device operation fails to obtain the resource, the process suspends until the operation meets the operational conditions. A non-blocking process does not stop when it cannot perform device operations. The suspended process enters the sleep state and is removed from the running que

「 Blocking and non-blocking definitions 」A blocking operation means that when a device operation fails to obtain the resource, the process suspends until the operation meets the operational conditions. The suspended process enters the sleep state and is removed from the running queue of the scheduler until the waiting

Blocking and non-blocking of Linux Device Driver Programming-general Linux technology-Linux programming and kernel information. The following is a detailed description. A blocking operation means that when a device operation fails to obtain the resource, the process suspends

but no data is available (not yet), the process must be blocked. This process is immediately awakened when data is reached, and that data is returned to the caller, even if it is less than the number requested in the count parameter to the method. If a process calls write and there is no space in the buffer, the process must be blocked and it must be in a different wait queue that is used as read. When some data is written to the hardware device

Driver of a blocking character device [Overview] First, it is clear that whether you are sleeping, sleep, blocking, or hanging, processes are essentially put on the waiting queue. [Sleep implementation] Sleep is processed by waiting for the queue. A waiting queue is a simple linked list composed of processes waiting for certain events. The kernel uses wake_queue