while 1

Part 1 Read Zen of Python and input import this in the python parser. A novice Python may notice the word "parse" and think that python is just another scripting language."It must be slow! " There is no doubt that the python program is not compiled

Multi-thread programming in LinuxFrom: http://www.china-pub.com Author: Yao jifeng (09:05:00)1 IntroductionThread technology was proposed as early as 1960s, but the real application of multithreading to the operating system was in the middle of

Pipeline (PIPE ):Used for communication between kinship processes (such as parent and child processes and sibling processes)A process writes data to the pipeline: the number of bytes written is smaller than pipe_buf, which is an atomic operation.

This problem occurs because some header files must contain the windows. h header files. For example, when mmsystem. h is used. # Ifndef setjmp_test_h# Define setjmp_test_h# Include # Ifdef _ cplusplusExtern "C "{# Endif# Define maxtask 20/* Maximum

How can I ensure thread security in iOS-multithreading? ios-MultithreadingI. Preface Some time ago I read several open-source projects and found that they have different ways to maintain thread synchronization.@ Synchronized, NSLock,

Linux inter-process communication (IPC) programming practices (10) System V semaphores --- typical PV operations// P primitive // P (semaphore * S)Wait (semaphore * S ){-- S-> value; if (S-> value {// Set the current process to blocking// Insert the

/* Chen 24c01 (1 k) memory I2C bus Experiment C language example single-byte and unsigned long integer read/write program sda scl can be any common I/O */// # Include # Define trytime 250// Number of attempts to perform the operation again when the

If, while usage differences in different languagesIf, while, and other branch loop structures inherit the external scope, that is, the external variables are visible inside the branch loop structure.However, the C language does not support the

1. Wait for the process to exit In Linux, the wait function is used to obtain the end information of the sub-process. The function prototype is as follows:   # Include Pid_t wait (int * statloc );   The function that calls wait is blocked until any

1 multiprocessing Module(1.) Direct import from multiprocessing import processimport osimport timedef info (name): print ("Name:", name) print (' Parent process: ', Os.getppid ()) print (' Process ID: ', os.getpid ()) print ("------------

Look back at the producer consumer model. #include #include#includestring.h>#include#include#include#include#defineErr_exit (M) Do{perror (M); Exit (Exit_failure); } while(0)#defineConsumers_count 1#defineProducers_count 2#defineBuffsize

The server listens to two ports, which are then connected by the client, and no end has a send thread and accept thread dedicated to sending and receivingService-side process: Create a socket, bind port (to populate the network address structure

definition : Semaphore is a counter that is used to control access to shared data objects by multiple processes. In order to obtain a shared resource, the process needs to perform the following actionsSignal usage steps:1: Initialize

Transferred from: http://blog.sina.com.cn/s/blog_66cc44d00100in5b.htmlMultithreading under a Linux system follows the POSIX threading interface, called Pthread. To write multithreaded programs under Linux, you need to use the header file pthread.h,

Linuxa process or thread is bound toCPUIn order for the program to have better performance, it is sometimes necessary to bind a process or thread to a specific CPU, which can reduce the overhead of scheduling and protect critical processes or

Review:Process creationFork ();Process terminationExit (0)/return 0;Process waitWait ()/waitpid (pid,null,0);Process substitutionexec function Family------------------------1.system () functionSystem-execute a shell command#include int system (const

(a) Correct the wrong question:Error message One:Error reason: There is no semicolon behind the while.Correction Method:Add a semicolon after the while.Correct the error message one after the compilation without errors, but run an error.Error

This example describes the file synchronization server implemented by Python. Share to everyone for your reference. The implementation methods are as follows: The service side uses Asyncore to save the file to local. The client uses Pyinotify to

A recent example is done with the RTSP protocol. The server has already, just need to do the client to do the line, in the process of the discovery of a number of problems, is about the UDP client binding problem.Perhaps everyone in the book to see

Dis-disassembler for Python bytecode, that is, the Python code is disassembled into bytecode instructions.Super easy to use:python-m Dis xxx.pyWhen I saw on the internet that while 1 was faster than while, I was confused and why was there such a