objective c usleep

Function name: sleepHeader file: #include #include Function: Execution suspend specified number of secondsSyntax: unsigned sleep (unsigned seconds);#include 　　Function name: usleepHeader files: #include Function: Usleep function suspends the process for a period of time, in microseconds (one out of 10,000 seconds);Syntax: void usleep (int micro_seconds);return value: NoneDescription: This function temporari

Thread congestion caused by usleep: The thread is inexplicably congested. When we use GDB attach, we find that the thread is blocked in the usleep call. It seems that we have heard of such problems from other colleagues. Change usleep to select. OS version: [Umg @ zjdxc-slee1 umg] $ uname-Linux zjdxc-slee1 2.6.18-53. el5pae #1 SMP wed Oct 10 16:48:18

Function Name: Sleep Header file: #include #include Function: Execution suspend specified number of seconds Grammar: Unsigned sleep (unsigned seconds); Example: #include #include int main () { int A; A=1; printf ("Hello"); Sleep (a); * VC Use sleep*/ printf ("World"); return 0; } Function Name: Usleep Header files: #include Function: Usleep function to suspend the process for a period of time, the U

Function Name: Sleep Header file: #include #include Function: Execution suspend specified number of seconds Grammar: Unsigned sleep (unsigned seconds); Example: #include #include int main () { int A; A=1; printf ("Hello"); Sleep (a); * VC Use sleep*/ printf ("World"); return 0; } Function Name: Usleep Header files: #include Function: Usleep function to suspend the process for a period of time, the Unit

ArticleDirectory Latency using I/O Ports Latency using a combination of languages Linux accurate time sequence (sleep, usleep, nanosleep) 11:36:48| Category:Linux| Tag:None |Font SizeSubscription First of all, I will say that it is not guaranteed that the process you run in user-mode can accurately control the time sequence because Linux is a multi-job environment. the progress you are performing will be paused for a

First, the native environmentCPU Information Intel (R) Core (TM) i3 CPU - 2 . 27GHzIntel (R) Core (TM) i3 CPU M @ 2.27GHzIntel (R) Core (TM) i3 CPU M @ 2. 27GHzIntel (R) Core (TM) i3 CPU M @ 2. 27GHzMemory information1990228 KBSecond, build the test code1. Test code#include #includeusing namespacestd;#defineElapsedTime 1intMain (void) {cout"Current pid:"Endl; while(1) { //Usleep (elapsedtime); } return 0;}2. Compiling# g+

Definitions and usage The Usleep () function delays code execution for several microseconds. Grammar Usleep (microseconds) parameter description microseconds required. The pause time in microseconds. return value no return value. Tips and Comments Note: This function cannot work on a Windows system until PHP 5.Note: One microsecond equals one out of 10,000 seconds. Example Output: 09:23:14 09:23:24

Code Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> Take the name, phonenumber, and age fields as an example. Input data in the text box on the iPhone, load the data into the array, and write

GCD: A solution to the parallel operation of the Apple for multi-coreGCD automatically manages the life cycle of threads (create threads, schedule tasks, destroy threads)Queue: Used to hold tasks (serial queue, parallel queue)Task: What action to

First of all, I would like to thank the following two blogs for putting me out of a major misunderstanding: Http://www.cppblog.com/kongque/archive/2011/01/18/138765.aspx Http://blog.csdn.net/zjwoody/article/details/7882240 In one of my projects, because of the need to communicate with the serial port, every read/write operation requires a delay of usleep (1000) = 1 ms, but the traffic is very large, every job has about 300 such communications, which

redemption code, the worst case will take 4 minutes to respond to the user, but of course it can be generated asynchronously with Message Queuing, but why uniqid need so much time to generate a simple string?Then go to see the implementation of Uniqid source code, paste the followingPhp_function (uniqid) {char *prefix = ""; #if defined (__cygwin__) zend_bool more_entropy = 1; #else zend_bool mor e_entropy = 0; #endif char *uniqid; int sec, USEC, Prefix_len = 0; struct Timeval TV;

PHP4 User Manual: function-usleep. Usleep (PHP3, PHP44.0.0) usleep-description of the number of milliseconds in which the voidusleep (intmicro_seconds) usleep () function pauses the number of milliseconds specified by micro_seconds (PHP 3, PHP 4> = 4.0.0) usleep-description

minutes to respond to the user, but of course it can be generated asynchronously with Message Queuing, but why uniqid need so much time to generate a simple string? and then go to see the implementation of the Uniqid source code, which is affixed to the following Php_function (uniqid) {char *prefix = ""; #if defined (__cygwin__) zend_bool more_entropy = 1; #else zend_bool mor e_entropy = 0; #endif char *uniqid; int sec, USEC, Prefix_len = 0; struct Timeval TV;

Usleep (PHP 3, PHP 4 >= 4.0.0) usleep--Pause execution for how many milliseconds to describe void Usleep (int micro_seconds) The Usleep () function pauses the number of milliseconds specified by the program execution by Micro_seconds See website Building server script class \phpphp user manual Fancyfunction.sleep.html>

memory pool for that thread6.When retain count increase?When will memory count increase?Answer: See iOS face question (i)7.What is commonly used NSObject class methods?Which methods of class nsobject are often used?Answer: NSObject is the base class of Objetive-c, which is composed of NSObject class and a series of protocols.Class methods Alloc, Class, Description object Methods init, Dealloc, –performselector:withobject:afterdelay: etc. are often us

Refer: [1] Reference Database: programming guide for Memory Management Assign a pointer P1 to another P2, that is, P2 = p1. In fact, P1 and P2 point to the same instance object. Any operation on P1 will affect P2, because they point to the instance objects of the same address. If you need to copy an object, instead of assigning values to pointers, you can use the copy constructor in C ++ to implement this function. Objetive-C is implemented through t

When writing application-level programs, sometimes you need to delay, what should I do?In the kernel code, we often see such a header file using # include The prompt error is as follows:error:no such file or directory.It is not very strange, obviously the file is there, how can not be called, and the kernel a lot of file calls very happy. What is this for?Because the kernel program differs from the application, some special kernel header file compilers are not allowed to be called by the applica

;mysqli->query ("Select num from goods WHERE id=1 LIMIT 1 for UPDATE"); $row = $result->fetch_assoc (); $num = Intval ($row [' num ']); if ($num > 0) { usleep); $this->mysqli->query ("UPDATE goods SET num=num-1"); $affected _rows = $this->mysqli->affected_rows; if ($affected _rows = = 1) { $this->mysqli->query ("INSERT into log (good_id) VALUES ({$num})"); $affected _rows = $this->mysqli->affected_rows; if ($aff

, here will not repeat, wait for time, interested to fill the gap here.The Linux kernel provides SYS_ADJTIMEX system tuning to support the above two interface functions. In addition, a sys_clock_adjtime system tune is provided to support POSIX clock tunning.Third, process sleep1, seconds sleep function: Sleep #include unsigned int sleep (unsigned int seconds); Calling this function causes the current process to Sleep,seconds (based on Clock_realtime) to return to the execution

);D. echo explain ($ remain );32. Which of the following functions removes a directory from a file system?A. rmdir ()B. dir ()C. del ()D. dir_gone ()33. What is the difference between sleep () and usleep ()?A. sleep () suspends operations and usleep () resumes themB. sleep () accepts seconds and usleep () accepts millisecondsC. sleep () works for the current pro