objective c usleep

The following code can be used for reference:static void _sleep_response_timeout (modbus_t *ctx) {#ifdef _WIN32/ * Usleep doesn ' t exist on Windows */ sleep ( Ctx->response_timeout.tv_sec * + (ctx->response_timeout.tv_usec/1000)); #else/ * Usleep Source Code */ struct TIMESPEC request, remaining; Request.tv_sec = ctx->response_timeout.tv_sec; Request.tv_nsec = ((long int) ctx->re

Sign up for a system service to boot from. 1 Script Authoring #vim test.sh Copy Code code as follows: #!/bin/bash #description: hello.sh #chkconfig: 2345 20 81 exec_path=/usr/local/ exec=hello.sh daemon=/usr/local/hello.sh Pid_file=/var/run/hello.sh.pid . /etc/rc.d/init.d/functions if [!-X $EXEC _path/$EXEC]; Then echo "ERROR: $DAEMON not Found" Exit 1 Fi Stop () { echo "stoping $EXEC ..." PS aux | grep "$DAEMON" | Kill-9 ' awk ' {print $} ' >/dev/null 2>1

of the returned results, but no other complex operations are performed. In addition, in order to determine the effect of the result processing callback on the performance comparison test results, it is possible to use the Usleep simulation real-world data processing logic (such as extraction, participle, write file or database, etc.).The callback functions that are used in the performance test are: Copy Code code as follows: function

The Linux boot service is to use service + TFTPD, the (Ubuntu) service will go to find/ETC/INIT.D under the launch program, service +TFTPD can run. Chkconfig is used to add the service to the boot list. Chkconfig--add tftpd chkconfig--list chkconfig tftpd on/off Writing shell Scripts #!/bin/bash #description: tftpd #chkconfig: 2345-Bayi set-e #及时返回错误 exec_path=/software/tftp-1.0/exec=tftpd daemon=/sof TWARE/TFTP-1.0/TFTPD Pid_file=/var/run/tftpd.pid #. /etc/rc.d/init.d/functions IF [!-X $E

) { socket_close ($socket) is stopped; Print (' Network exception, please check the network connection!! '); Exit (); } Refresh frequency (250 milliseconds) usleep (250000); } Set the blocking mode @socket_set_block ($socket); Send command to Device Socket_write ($socket, $in, strlen ($in)); Close connection socket_close ($socket); Send_socker_xdcoder $buffer to return value function Send_soc

latency can be reduced to this smaller fragment, and the custom sleep is as follows Copy Code code as follows: void sleep (int seconds, const bool* run) { int count = seconds * 10; while (*run count > 0) { --count; Usleep (100000); } } Note that the second parameter of this sleep must be a pointer type, because we need to detect its real time value, not just the values it passes in, but the corresponding functio

Time_sleep_until ($future) {if ($future Trigger_error ("Time in Past", e_user_warning);return false;}Usleep (($future-microtime (1)) *1000000);return true;}}?> Returns false and generates a warningVar_dump (Time_sleep_until (Time ()-1));may only work on faster computers, 'll sleep up to 0.2 secondsVar_dump (Time_sleep_until (Time () +0.2));?> // +----------------------------------------------------------------------+// | PHP Version 4 |// +--------

Use Rights: All usersUse mode: Sleep [--help] [--version] NUMBER[SMHD]Description: Sleep can be used to delay the current action for a period of timeParameter description:--HELP: Display auxiliary messages--version: Display version numberNumber: Length of time, followed by S, M, H or DWhere S is the second, M is minutes, H is the hour, D is the number of daysExample:Delay 1 minutes after displaying the current time, and then display the time again:Date;sleep 1m;dateThis command is more used in s

, SOCK_STREAM, SOL_TCP) or die ("cocould not create socket! "); // Set the timeout value $ timeout = 2; $ time = time (); // set the non-blocking mode @ socket_set_nonblock ($ socket); // determine the timeout value while (! @ Socket_connect ($ socket, $ address, $ service_port) {$ err = socket_last_error ($ socket); // The connection is successful. if ($ err = 10056) {break;} // connection failure. Determine the timeout time. Stop if (time ()-$ time) >=$ timeout) {socket_close ($ socket ); prin

= $ config_file_lock_path. "/". $ this-> name;}}$ This-> mode = $ mode;$ This-> handle = @ fopen ($ this-> name, $ mode );If ($ this-> handle = false ){Throw new Exception ($ php_errormsg );}}Public function close (){If ($ this-> handle! = Null ){@ Fclose ($ this-> handle );$ This-> handle = null;}}Public function _ destruct (){$ This-> close ();}Public function lock ($ lockType, $ nonBlockingLock = false){If ($ nonBlockingLock ){Return flock ($ this-> handle, $ lockType | LOCK_NB );} Else {Ret

. 0.0.1 ';If (strlen ($ ip )){If ($ this-> fp = fsockopen ($ ip, 23 )){Fputs ($ this-> fp, $ this-> conn1 );$ This-> Sleep ();Fputs ($ this-> fp, $ this-> conn2 );$ This-> Sleep ();$ This-> GetResponse ($ r );$ R = explode ("\ n", $ r );$ This-> loginprompt = $ r [count ($ r)-1];Fputs ($ this-> fp, "$ user \ n ");$ This-> Sleep ();Fputs ($ this-> fp, "$ pass \ n ");If ($ this-> use_usleep) usleep ($ this-> loginsleeptime );Else sleep (1 );$ This-> Get

Apache restart will have to revisit, fastcgi will be better.The following code, under the current folder, can generate a test.txt and write a timestamp every 20 seconds, regardless of whether the client closes the browser.Ignore_user_abort (TRUE);Set_time_limit (0);function Write_txt () {if (!file_exists ("Test.txt")) {$fp = fopen ("Test.txt", "WB");Fclose ($FP);}$str = file_get_contents (' test.txt ');$str. = "\ r \ n". Date ("H:i:s");$fp = fopen ("Test.txt", "WB");Fwrite ($fp, $STR);Fclose ($

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 ){Usleep