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Shared memory The essence of interprocess communication is to allow different processes to access a common resource.1. Shared memory is the fastest way to communicate between processes (why)2. Shared memory does not provide any synchronization

http://www.ibm.com/developerworks/cn/linux/thread/posix_thread3/#1When multithreading wants to wait for a condition to be set up, use pthread_cond_wait to block the thread, First clear the role of wait, pthread wait and lock can block the

In PHP, the so-called output buffer, is the code in the Echo or other output commands in the execution is written to the PHP buffer, after the script execution or force the output cache command, will output data to the browser (where PHP buffer Is

NANOMSG Experiment--pubsubThe Publish subscription model is a common feature provided by many message middleware. The message mechanism enables the message publisher and the message to receive (consume) peopleTo decouple. PubSub mode is also one of

Text: C Language Multithreaded programmingNote: The content of this article originates from the Internet, thanks to the author! multithreaded programming for Windows C languageIn multithreaded programming in Windows, the functions that create

Compile and install httpd (CentOS-6) Ready to work: 1. Turn off firewall 6:service iptables stop;chkconfing iptables off7:systemctl Stop firewalld;systemctl Disable Firewalld There is another way: clear all rules to temporarily stop the

1 Preface Recent work is not too busy, just have time to understand some other things, originally intended to go to the physical examination this morning, but to see the weather or tomorrow to go again, there is a big reason: there is no

Demo Effect: 1, the first level menu 2, Level two menu 3. Perform operation Script reference: Copy Code code as follows: #!/bin/bash #author Lic (Oldboy Linux student) #date 1304 disk_no= "/DEV/SDA1" Nginx_dir= "/usr/local/

What are 0x0d and 0x0a , it's possible that most people know it's a carriage return and a newline character, but that's a carriage return, which is a newline. It is estimated that a lot of people are not clear for a moment--- Perhaps you do not

The critical section can be used to achieve thread synchronization. The event and mutex (mutex) can also be done.Thread events in the Win32 APIHANDLE hevent = NULL;void maintestfun{hevent = CreateEvent (null,false,false,null);SetEvent (hevent);Char

Thread SynchronizationWhen using multiple threads in a program, there are generally few threads that can perform completely independent operations during their lifetimes. There are more cases where some threads do some processing, and other threads

Copy Code code as follows: #include #include pthread_mutex_t Device_mutex; int count=0; void Thread_func1 () { while (1) { Pthread_mutex_lock (&device_mutex); printf ("Thread1:%d\n", count); Pthread_mutex_unlock (&device_mutex);

typedef struct MSG_HDR_S { uint32 msg_type; UInt32 Msg_len; UInt32 msg_src; UInt32 msg_dst; } msg_hdr_t; typedef struct MSG_S { msg_hdr_t Hdr; Uint8 data[100]; } msg_t;Here is an explanation of the message

The question of whether multiple threads access the same variable requires locking is discussed earlier. Today's code validates the previous conjecture that the minimum exchange data for 32-bit CPUs and memory is 4 bytes/times, which is why the

From WIN2000 to win XP, and then to WIN2003, the increase in security for MS IIS servers is obvious. In WIN2000, a normal PHP shell can break it down; In Win XP, even if safe mode = off, you cannot execute system commands with functions such as

This article will give a detailed explanation of the mutex, and use a mutex solution in the previous article, two semaphores to solve only after the child thread finished processing and statistics of the input, the main thread can continue to

In WIN2000, a normal PHP shell can break it down; In Win XP, even if safe mode = off, you cannot execute system commands with functions such as system (), but we can also use the COM () function to break through; to win 2003, even if both IIS and

Today, a friend shouted in the Linux Group that he needed to write a script to implement unified security configuration for more than 100 Linux systems, and then asked someone to write the script. I have nothing to worry about. They are all very

The article is too long, do not introduce too much, anyway, the head of the article explains the approximate meaning ...The original text reads as follows:Wrote a simple queue task to handle. Multi-process tasks, which may be used by asynchronous

Thread synchronization mechanism mutual exclusion lock communication mechanismint Pthread_mutex_init (pthread_mutex_t *__mutex, __const pthread_mutexattr_t *__mutexattr) : Initialize mutex, return successfully 0Parameter 1: Mutex to