gettimeofday

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Linux C Language Acquisition system time information

For example, get the current year:/* Get current system time temporarily not usedint iyear = 0;int sysyear = 0;time_t now;struct TM *timenow;Time (&now);TimeNow = LocalTime (&now);Sysyear = timenow->tm_year+1900;*/How to get system time under

Simple analysis on the function _c language of precise control time under Linux

If only the test time is OK, but if the program uses the time control class functions, such as times, Gettimeofday itself will consume a lot of time, and increase the cost of program execution, so that the time is not accurate. In this case, the

Script MSAgent Components The Microsoft Wizard pulled out the system with its own pet _vbs

Copy Code code as follows: ' On Error Resume Next Stragentname = "Merlin" Stragentpath = "C:\windows\msagent\chars\" & Stragentname & ". ACS" Scriptcomplete=0 Set objagent = WScript.CreateObject ("Agent.control.2", "Agent_")

How Android uses Uinput to simulate input devices _android

In Google remote, the Android receiver receives the IR code from the socket and then simulates the IR code to System processing, which is the principle of the Google remote receiver. How does the system end simulate input event?Method One: Through

PHP Concise function (PHP simple and clear function syntax) _php tips

1, with MySQL-relatedMysql_connectEstablish a connection to the MySQL serverGrammarResource mysql_connect (String server[,string usingname[,string password[, BOOL New_link[,int Client_flags]]]eg Copy Code code as follows: $DB _host = "

PHP Concise function Summary _php tips

PHP Concise function Topic: Class of bacteria-like PHP concise function Brief introduction: PHP simple and clear function syntax For the crowd: interested in the open source community, interested in PHP, have a little time to understand the

PHP Date Function and PHP time function __ function

Checkdate: Verify the correctness of the date. Date: Format the time of the server. Strftime: The time of the server is formatted locally. GETDATE: Get time and date information.

Libaio asynchronous I/O test code

Need Libaio libaio-devel bag, go to http://rpm.pbone.net/index.php3. This is imitate Libaio-oracle writes, which good person goes to do a test, sends out the result, best can compare with glibc in the same environment If there is something wrong

struct Timeval and struct TIMESPEC

Timeval DESCRIPTIONThe functions Gettimeofday and Settimeofday can get and set the time asAs a timezone. The TV argument is a timeval struct, as specified in : structTimeval{time_t tv_sec; * Seconds * *suseconds_t tv_usec; * Microseconds * *};The

Advanced Programming for the UNIX Environment reading notes (5)

Catalog: http://blog.csdn.net/alex_my/article/details/39346381 Date and time The functions involved are listed below, followed by examples to run, output results, more intuitive. Time this piece of information is limited, if wrong, still look

"Linux_unix system Programming" CHAPTER10 time

Chapter10 time1: Real time: The starting point for measuring this time is two: (1) a certain standard point; (2) a fixed spot in the process life cycle (usually initiated by the program)2: Process time: The total amount of CPU time used by a process,

Summary of simple PHP Functions

Interested in open-source communities, php, and a little time to understand php Interested in open-source communities, php, and a little time to understand php Simple PHP Functions Topic: simple PHP Functions Brief Introduction: PHP is simple

Php time and date functions-PHP source code

Ec (2); setlocale () mktime () getdate obtains the time and date information. Syntax: arraygetdate (inttimestamp); Return Value: Array Function Type: time and date content description returned array elements include the following items: & quot;

Reproduced Summary of C + + multithreading programming

Original: http://www.cnblogs.com/zhiranok/archive/2012/05/13/cpp_multi_thread.htmlIn the development of C + + programs, generally in the throughput, concurrency, real-time high requirements. When designing a C + + program, the following points can

Time operation functions accurate to microseconds in Linux

Article Title: time-based operation functions accurate to microseconds in Linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems,

Time drift Detected

Oracle 11.2.0.3 database is installed on solaris10. After the database is manually created, it is found that there is a very regular alarm information in the alarm log, which is reported every 76 minutes. The alarm information is as follows: Tue Aug 

Linux seqlock & RCU Analysis

There are many synchronization mechanisms in the Linux kernel. The classic ones include spin_lock (waiting lock), mutex (mutex lock), semaphore (semaphore), and so on. And almost all of them have corresponding rw_xxx (read/write locks), so that the

Step-by-Step Linux Network Programming-ping command Implementation Analysis

Let's talk about the principles of the Ping program. In fact, it's quite simple. A host system says to another host system: I love you (ICMP packets ), then, if the host believes you or wants to communicate with you, it will return the I love you

Time-precise functions in Linux

If only the test time is okay, but if the program uses time control functions, such as time and gettimeofday, it will consume a lot of time and increase the program execution cost, the obtained time is not accurate.In this case, the CPU heartbeat

Condition variables of pthread

Introduction: The related functions are as follows:1 int pthread_cond_init (pthread_cond_t * cond, pthread_condattr_t * cond_attr );2 int pthread_cond_wait (pthread_cond_t * cond, pthread_mutex_t * mutex );3 int pthread_cond_timewait (pthread_cond_t

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