synchronization

How to force threads to work in strict order?

由 人盡茶涼 提交于 2019-12-08 08:30:06
问题 I'm writing a multi-thread console application using WinAPI's critical sections as the synchronizing mechanism. I need to create 5 threads, every thread has its own string to be displayed by the thread. Threads should output their strings sequentially, one by one. So, I have thread function: void thread_routine(void* data) { std::string* st = (std::string*)data; while(1) { /* enter critical section */ std::cout << st; // not exactly that way, but I hope that you understood what I've meant.

Serial Task Executor; is this thread safe?

由 寵の児 提交于 2019-12-08 08:26:49
问题 I have a class that I've created to allow asynchronous sequential execution of tasks, using the ThreadPool as the means of execution. The idea is that I'll have multiple instances running serial tasks in the background, but I don't want to have a separate dedicated Thread for each instance. What I'd like to check is whether this class is actually thread safe. It's fairly brief, so I thought I'd run it by the experts here, in case I'm missing something obvious. I've omitted a few of the

Needed clarifications for NSFetchedResultsController and NSFetchedResultsControllerDelegate

由 谁说胖子不能爱 提交于 2019-12-08 08:02:01
问题 Within SO there are a lot of questions/replies about NSFetchedResultsController and delegate. Sometimes the delegate fires, sometimes not. And since Core Data is quite complex argument is quite difficult to understand what is going on without spending a lot of time on it. In addition, the documentations says that there are several problems but it does not list them. There are several known issues and behavior changes with NSFetchedResultsController on various releases of iOS. Hence, I need

MySQL Database synchronization

由 孤街浪徒 提交于 2019-12-08 07:55:03
问题 Is there any free MySQL synchronization tool out there? I need to synchronize the database structure across servers. Data synchronization is not necessary (but is a plus). It needs to be free (for non commercial use), not a free trial. Edit: None of the answers so far has worked, were free, or a suitable to my needs. 回答1: Toad® for MySQL can do both a "Schema Compare" as well as a "Data Compare" (and a lot more). By the way: the software is freeware - in case somebody asks. 回答2: The only

Synchronizing code with two subversion repositories

由 两盒软妹~` 提交于 2019-12-08 07:37:29
问题 Searching here I found that this question was already asked, but I think my situation is worse!-( I'm a total novice with Internet repositories development. A book I'm reading contains an interesting sample project - a social network in ASP.Net. The author put the code as a CodePlex project. I tried to "get" the version through VisualSVN (subversion) but failed. So what I did was download the code as a zip file (i.e. disconnected from the project's repository), created my own local repository

Swing timer synchronization

由 自闭症网瘾萝莉.ら 提交于 2019-12-08 07:33:11
问题 I'm confused about how the Swing timer work. In the code below, I want to display from 0~9 every 400ms in the first text field when press START (once). After that the second text field will display "Finished". public class Main extends JPanel{ private static final long serialVersionUID = 1L; private JButton bStart; private JTextField tTest; private JTextField tNumber; Main(){ bStart = new JButton("Start"); bStart.addActionListener(new ActionListener(){ @Override public void actionPerformed

Help me to understand JSF managed bean scope from concurrency view

由 痴心易碎 提交于 2019-12-08 06:58:28
Can anyone help me to understand the JSF managed bean scope from a concurrency perspective ? My Understanding: Once i have a bean scoped in a session scope that's mean : there is only one user can access this managed bean so there is no possibility to concurrency occur. Also, once i use a bean in a request scope then this bean will be created once a request had initiated and that bean will be removed once a response returned. (each clients have different copy of this bean) Also, once i use a bean in a none scope then once the user call the bean it will be created and after finish the call the

Using Git and Dropbox on different machines without Problems?

由 痞子三分冷 提交于 2019-12-08 06:46:16
问题 I already found some similar topics to this, but it wasn't exactly the same. I am working on webdesign projects on three different machines Office Windows PC Home Windows PC MacBook I keep my whole Project-Folder synchronized trough DropBox. This works very well and I'll keep that for sure. I don't share any projects with other persons with DropBox. Now I'd like to use Git for version controlling and to collaborate on code projects with other persons. I still work on all three machines, but

Is it possible to use multi-threading effectively for a short period of time

由 吃可爱长大的小学妹 提交于 2019-12-08 06:35:22
问题 Consider I have a one-thread code that does something in the main thread and it takes about 10-20 ms. I would like to utilize two cores of my processor and split the task for two threads living at different cores. Technically I should probably resume two sleeping threads and make myself to sleep until they're done and sleep again. Nothing scaring if the task is long enough to execute. But for 10-20 ms I suspect the penalty of using well-known synchronization techniques would cost me a large

Sync DB between Windows Mobile and MySQL

由 a 夏天 提交于 2019-12-08 06:27:46
问题 I am trying to create a windows mobile application that contains a database and can occasionally be connected to the Internet. When connected, I would like to sync the local database with the central database server. The central server is a MySQL server. The local database can be anything (probably SQL Compact). What I did so far: Installed Microsoft Sync Framework Installed MySQL for ADO.NET Created a Smart Device Project Created a WCF Library (from this tutorial) Created a connection to the
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