objective c usleep

usage examples are available in three files. How to get the execution time of a line or a piece of code 1, usually use the Microtime function to get the microsecond time before and after the code and then compare the difference of two values, as follows But this method is very limited, not a wide range of applications, and every time you need to write a lot of code, suitable for simple debugging. Please see the PHP manual for details.2, by using the Benchmark_timer class to get co

the beam cola echo "Client Connection close\n"; Return } if ($RecvData ===false) { /* Since we are using NONBLOBK mode The situation here is that the external connection has no access to the information */ $NoRecvData =true; Clear out last Errror Socket_clear_error ($ServerSocket); } if ($NoRecvData $NoRemoteRecvData) { If external connections and VNC connections are not available to read, Let the program sleep for 0.1 seconds to avoid long-term CPU resources

/Timer. php'; $ timer = new Benchmark_Timer (); $ timer-> start (); $ timer-> setMarker ("marker 01"); usleep (1 ); $ timer-> setMarker ("marker 02"); usleep (2); $ timer-> setMarker ("marker 03"); usleep (3 ); $ timer-> stop (); $ timer-> display (); There are two ways to print the result:One is table output., $ Timer-> display (); suchManual var_dump or print_

[] ="Dhcp.wlan0.result"; static int Dhcp_reset () { int stop_wait = 5; int start_wait = 10; int result_wait = 20; char Kvalue[property_value_max] = {'} '}; LOGD ("Kevin start Dhcp_reset"); Property_set ("Ctl.stop", dhcp_server); While (stop_wait--> 0) { Usleep (500000); if (Property_get (Dhcp_prop, Kvalue, NULL)) { if (strcmp (Kvalue, "stopped") = = 0) { LOGD ("Kevin:property name is%s get_value \ Is%s and

function:Linux provides a sleep function with different time accuracy. Some of these functions appear in the Linux high version, and some are non-thread safe. The following is a detailed description of each sleep function.Sleep#include From the parameter name of sleep, you can see that the function's sleep time unit is seconds. Since this sleep function may be interrupted by external signals, it has a return value that indicates the rest of the sleep time. If the time specified by the parameter

Benchmark_timer (); $timer->start (); $timer->setmarker (" Marker "); Usleep (1); $timer->setmarker (" marker "); Usleep (2); $timer->setmarker (" marker "); Usleep (3); Timer->stop (); $timer->display (); There are two ways to print results: One is tabular output , $timer->display (), and the following figure Another is manual var_dump or Print_

original is this: "After the data is written, give a stop signal must be delayed after 10MS,24C02 need so long load data" This is 24C02 electrical characteristics. In the Write function make a usleep (10000). Add: Our CPU is 6 cores 500M frequency, the computation processing ability is extremely strong. If the user layer to write a general delay program does not work, generally use 2 for, a for execution 10,000 times, on the PC there will be obvious

Article from: http://blog.sina.com.cn/s/blog_77051ec50101br8g.html It is often necessary to do some delay processing in Linux shell scripts.So you often use sleep or usleep functions.Here's a look at the difference between sleep and usleep: Sleep: Default in seconds. Usleep: The default is in microseconds. 1s = 1000ms = 1000000us Sleep can specify not only t

Analysis of Run loop in IOSAlthough Runloop is the key concept that the thread wants to close, but the runloop in cocoa is not used much, the View related blog post has not got to get started its "why". So shallow to learn a few days, a humble share of the shallow, as a note, write down its why. There is no wrong or wrong place, also hope to advise, not very grateful.Run Loop FAQWhen the thread finishes executing, it is destroyed. In order for the line Cheng Nen to run all the time, we can get a

Description: function name: SleepFunction: Execution hangs for a period of timeUsage: unsigned sleep (unsigned seconds);Using the top file in VC#include In the GCC compiler, the header file used differs depending on the GCC versionThe header files that the Linux system needs to add #include Note:In VC, the first English character in sleep is an uppercase "S"In standard C is sleep, do not capitalize. The following uses uppercase to illustrate, specifically what to see you with what compiler. Simp

[Php]// Ensure the maximum number of sub-ProcessesIf ($ this-> _ maxFork> 0 $ this-> _ children> $ this-> _ maxFork){Yii: log ("_ children>". $ this-> _ maxFork, CLogger: LEVEL_WARNING ,__ METHOD __);$ This-> handler (SIGCHLD );Usleep (200 );Continue;}/*** Monitoring signal* @ Param object socket $ clientt* @ Return boolean*/Public function handler ($ signo ){Yii: log ("handler {$ signo}", CLogger: LEVEL_INFO, _ METHOD __);Switch (intval ($ signo )){

() function to obtain the IServiceManager interface of SM;Call IServiceManager: addService () to save the object reference to the Binder Driver andRegister and manage ServiceManager so that other processes can find the corresponding service process through ServiceManager: getService The above code is the same as that of serviceTestB service process. B. Test the Service ProcessTestService. cpp:# Include # Include # Include # Include # Include # Include Using namespace android; Enum {CALCULATE_A

parameter. function foo() { $o = $last = ''; do { $last = $o; usleep(10); $t = explode(' ', microtime()); $o = substr(base_convert(strtr($t[0].$t[1].$t[1], '.', ''), 10, 36), 0, 12); }while($o == $last); return $o;}Of course, this generation algorithm also has limitations. A 12-bit 36-digit number can have a maximum of pow (36, 12) states. When the total volume exceeds pow (36, 12), repetition is inevitable. The most easy to think o

This article mainly introduces the example of using multiple processes to simultaneously control file read/write in php. For more information, see The code is as follows: /** * Write Data * @ Param [string] $ path [file path] * @ Param [string] $ mode [file opening mode] * @ Param [string] $ data [data] * @ Return [bool] */ Function writeData ($ path, $ mode, $ data ){ $ Fp = fopen ($ path, $ mode ); $ Retries = 0; $ Max_retries = 100; Do { If ($ retries> 0 ){

. in addition, to determine the impact of result processing callback on performance comparison test results, you can use usleep to simulate the data processing logic (such as extraction, word segmentation, writing files or databases) that is more appropriate in reality ). The callback functions used in performance testing are: The code is as follows: Function callback ($ data, $ delay ){ Preg_match_all ('/(. +)

Linux timer use Postedon2010-03-2017: 40feisky read (1073) Comments (0) edit favorite use timer is nothing more than to periodically execute a task, or it takes a specified time to execute a task. To achieve this goal, there are generally... Linux timer usage Posted on feisky reading (1073) Comments (0) edit favorites The purpose of using a timer is nothing more than to periodically execute a task, or to execute a task at a specified time. To achieve this goal, there are generally two common ef

(! Isset ($ this-> oMemcache )){ $ This-> oMemcache = new Memcache (); $ This-> oMemcache-> connect ('2017. 0.0.1 ', 127 ); } Return $ this-> oMemcache; } /* Add a key to MeMcache */ Public addMemcache ($ sKey, $ sValue, $ iTimeout ){ For ($ I = 0; $ I $ BRes = $ this-> oMemcache-> add ($ sKey, $ sValue, $ iTimeout ); If ($ bRes ){ Return true; } // If the lock fails, apply the new lock after sleep. Usleep ($ this-> iLockRetryInterval * 1000 )

Copy codeThe Code is as follows:/*** Write data* @ Param [string] $ path [file path]* @ Param [string] $ mode [file opening mode]* @ Param [string] $ data [data]* @ Return [bool]*/Function writeData ($ path, $ mode, $ data ){$ Fp = fopen ($ path, $ mode );$ Retries = 0;$ Max_retries = 100;Do {If ($ retries> 0 ){Usleep (rand (1, 10000 ));}$ Retries + = 1;} While (! Flock ($ fp, LOCK_EX) and $ retries If ($ retries = $ max_retries ){Return false;}Fwrite

c). Synchronously sends, waits for a response, and receives 1 system messages after a timeout.Put code on it.#include #include"caf/all.hpp"#include"caf/io/all.hpp"#includestring>#include#include#includeusing namespacestd;using namespacecaf;behavior Fun (Event_based_actor*Self ) { return{[Self] (Const string STR,ConstActor buddy)string{aout (self)Endl; //Self->delayed_send (buddy,std::chrono::milliseconds), "I ' m lated"); //std::this_thread::sleep_for (Std::chrono::seconds (1)); //

: WaitUnLock (){While (this-> Lock = 1){Printf ("Queue String Waiting \ n ");Usleep (200000 );}Printf ("Queue String UnLocked \ n ");} Void StringQueue: Lockdata (){Printf ("Queue String Locked \ n ");This-> Lock = 1;}Void StringQueue: UnLockdata (){Printf ("Queue String UnLocked \ n ");This-> Lock = 0;}Void StringQueue: WaitUnLock (){While (this-> Lock = 1){Printf ("Queue String Waiting \ n ");Usleep (2000