wait

Is there a version of the wait() system call that sets a timeout?

由 倾然丶 夕夏残阳落幕 提交于 2019-11-26 22:04:01
问题 Is there any way to use the wait() system call with a timeout, besides using a busy-waiting or busy-sleeping loop? I've got a parent process that fork s itself and exec s a child executable. It then waits for the child to finish, grabs its output by whatever means appropriate, and and performs further processing. If the process does not finish within a certain period of time, it assumes that its execution timed out, and does something else. Unfortunately, this timeout detection is necessary

How do you have the code pause for a couple of seconds in android?

由 試著忘記壹切 提交于 2019-11-26 21:55:54
Basically I need a pause (based on just a few seconds) to be put into one action so that the user can see what happens before the next action is taken. So for blackjack, when it's the dealer's turn and he decides to hit, he hits, a card is added, and then he decides what to do next. So before he decides on what to do next, I want the code to pause so it can be "seen" as to what the dealer is doing this way the dealer doesn't complete his actions in less than a second and the player only sees the results. Thanks in advance! I should note I have tried using wait(insert number here); but i am

How to wait for element to load in selenium webdriver?

由 有些话、适合烂在心里 提交于 2019-11-26 21:22:21
问题 I am new to selenium webdriver and am testing one application. In my application, I have to test about linking Facebook Account. Whenever I click on link the pop up will be displayed where I have to enter credentials. I am able to link sometimes and sometimes the test fails. I know the reason because it takes time to load pop up window and next command is executed so it is not able to find the element. I have used Thread.Sleep but I want to use implicit wait or explicit wait which is always a

Synchronous Wait Without Blocking the UI-Thread

由 本秂侑毒 提交于 2019-11-26 20:29:00
问题 Is there a synchronous wait function that won't tie up the UI-thread in .NET WPF? Something like: Sub OnClick(sender As Object, e As MouseEventArgs) Handles button1.Click Wait(2000) 'Ui still processes other events here MessageBox.Show("Is has been 2 seconds since you clicked the button!") End Sub 回答1: You can use a DispatcherTimer for that sort of thing. Edit: This might do as well... private void Wait(double seconds) { var frame = new DispatcherFrame(); new Thread((ThreadStart)(() => {

How to wait till the response comes from the $http request, in angularjs?

由 空扰寡人 提交于 2019-11-26 19:20:56
I am using some data which is from a RESTful service in multiple pages. So I am using angular factories for that. So, I required to get the data once from the server, and everytime I am getting the data with that defined service. Just like a global variables. Here is the sample: var myApp = angular.module('myservices', []); myApp.factory('myService', function($http) { $http({method:"GET", url:"/my/url"}).success(function(result){ return result; }); }); In my controller I am using this service as: function myFunction($scope, myService) { $scope.data = myService; console.log("data.name"+$scope

How to wait for a keypress in R?

由 白昼怎懂夜的黑 提交于 2019-11-26 18:23:33
I want to pause my R script until the user presses a key. How do I do this? nnn As someone already wrote in a comment, you don't have to use the cat before readline() . Simply write: readline(prompt="Press [enter] to continue") If you don't want to assign it to a variable and don't want a return printed in the console, wrap the readline() in an invisible() : invisible(readline(prompt="Press [enter] to continue")) Gravitas Method 1 Waits until you press [enter] in the console: cat ("Press [enter] to continue") line <- readline() Wrapping into a function: readkey <- function() { cat ("Press

Terminating idle mysql connections

由 做~自己de王妃 提交于 2019-11-26 18:03:44
问题 I see a lot of connections are open and remain idle for a long time, say 5 minutes. Is there any solution to terminate / close it from server without restarting the mysql service? I am maintaining a legacy PHP system and can not close the connections those are established to execute the query. Should I reduce the timeout values in my.cnf file those defaults to 8 hours? # default 28800 seconds interactive_timeout=60 wait_timeout=60 回答1: Manual cleanup: You can KILL the processid. mysql> show

fork() and wait() with two child processes

由 家住魔仙堡 提交于 2019-11-26 18:00:03
问题 I need to use the fork() and wait() functions to complete an assignment. We are modelling non-deterministic behaviour and need the program to fork() if there is more than one possible transition. In order to try and work out how fork and wait work, I have just made a simple program. I think I understand now how the calls work and would be fine if the program only branched once because the parent process could use the exit status from the single child process to determine whether the child

Wait and notify in Consumer and Producer Threads

由 非 Y 不嫁゛ 提交于 2019-11-26 17:25:22
问题 Just started learning multi-threading. I have 5 producers and 2 consumers in multiple threads. Basically this program adds 100 items into the queue. The producer will stop adding when the queue size is 100. I would like the consumer to notify the producer when the consumer removes all the items from the queue so that the producer can start adding again. Currently the producer will wait but never gets notified by the consumer. Producer: public class Producer implements Runnable { private

Wait for a while without blocking main thread

由 丶灬走出姿态 提交于 2019-11-26 16:58:32
问题 I wish my method to wait about 500 ms and then check if some flag has changed. How to complete this without blocking the rest of my application? 回答1: Thread.Sleep(500) will force the current thread to wait 500ms. It works, but it's not what you want if your entire application is running on one thread. In that case, you'll want to use a Timer , like so: using System.Timers; void Main() { Timer t = new Timer(); t.Interval = 500; // In milliseconds t.AutoReset = false; // Stops it from repeating
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