wait function

Introduction-Getch Brief IntroductionRefer to the old TC version getch description. (the article introduces a bit narrow, the application point is some dinosaur game era development details)#include /**/int __cdecl getch (void);Remember reading a

 implementation of Linux file systemLinux has a tree structure to organize files, the top of the number is the root directory/, the node is the directory, and the stub point is the data file contained. We can perform various operations on files,

Process exitThe process end indicates that the process is about to end, and the process exit methods in the Linux system are divided into normal exit and exception exit.Exit functionThe process has three normal termination methods and two kinds of

8.1: IntroductionThis chapter describes the process Control for UNIX, including creating new processes, executing programs, and terminating processes. It also describes the various id--of the process properties, the actual, valid, and saved user and

The core concept in the operating system is the process: This is an abstraction of the running program.A process is a type of activity that has programs, inputs, outputs, and states. A single processor can be shared by a number of processes, and it

Zombie Process: The essence is the process descriptor task_struct;Maintain the state of the child process, including the child process ID, the terminating state, and the resource utilization of the process (CPU time, memory)int Wait (INT*STAT_LOC):

Sometimes we need to start another program (process) in our own program to help us do some work, so how do we start other processes in our own process? There are a number of ways to do this in Linux, and here's a description of the differences

ThreadsWe all know that the execution of a program is done by the process, while the actual execution of the code in the process is a thread to complete, it is the real execution flow. Usually a program is called a thread (threads) in a line of

What is a zombie process ?First the kernel releases all the stores used by the terminating process (called the exit system call), closes all open files, and so on, but the kernel holds a certain amount of information for each terminating child

Process Status:1) Overview of the status of the process:1.1) Running (R), running or going to run1.2) interruptible (S), blocked while waiting for an event, may be activated by a signal1.3) uninterruptible (D), blocked while waiting for an event,

Introduction:For each process, there is a non-negative integer representing the unique process ID. Although the ID of a process is unique, it is reusable. There are some specialized processes in the system. A process such as ID 0 is usually a

Subprocess is used to replace some old modules and functions, such as Os.system, os.spawn*, os.popen*, popen2.*, and commands.*.The purpose of subprocess is to start a new process and communicate with it.1.PopenOnly one class is defined in the

Read the reading notes of high performance JavaScript Several principles: 1, put the script on the bottom in head, to ensure that before JS load, can load the normal display of the page. inline and external files This seed file is about

Suddenly jump to wait function WaitForSingleObject, because the following Mutex, Semaphore, Event, Waitabletimer and other synchronization means to use this function; But the wait function does more than waitforsingleobject it, but it's the simplest.

The first class of delay function prototypes are: (Busy, etc.)void Ndelay (unsigned long nsecs);void Udelay (unsigned long usecs);void Mdelay (unsigned long msecs);Description: Kernel functions ndelay, Udelay, and mdelay are useful for short delays,

Method for detecting element occurrences.Although it is based on JQuery, but the code is very concise, can be modified into a pure JS version.TextJQuery.fn.wait =function(Func, Times, Interval) {var _times = Times | | -1,100 times _interval =

One, the basic concept of threading1, the definition of the thread:Threads are also referred to as lightweight process (LWP) Computer science terminology, which refers to the scheduling unit of a running program. A thread is an entity in a process,

1. Operation function of system call---file #inlclude int open (char *name,int how) file Open #include int close (int fd) file closed size_t Read (int fd,void *buf, size_t count) size_t write (int fd,const void *buf,size_t count) Sleep (1) The

Today's poetry sharing: On the days of the Partridge and the late day of the Southern Song of Xin Qiji Late day, a sad, Willow pond Green is gentle. If the eyes are not left to hate, do not believe that the world has a bald head. Intestine has

How to load: The code is as follows Copy Code Well, first look at the code simplification effect: Determine if test equals 1 end alert results The code is as follows Copy Code $ ('