synchronization

问题 I am sorry, I have stupid question. I have two threads. Thread_Main and Thread_Simple, in Thread_Main performed method A() and method B(). In Thread_Simple performed method C(). Now: first performed method A(), then performed method C(), then performed method B(), then performed method A(), then performed method C(), then method B(), ... But I want: first performed method A(), then performed method B(), then performed method C(), then A(), B(), C(), ... How can to do it? I just have access to

问题 so I was looking over my next school assignment, and I'm baffled. I figured I would come to the experts for some direction. My knowledge on synchronization is severely lacking, and I didn't do so hot on the "mcopyfile" assignment it refers to. Terrible would probably be a good word for it. If I could get some direction on how to accomplish this problem, it would be much appreciated. Not looking for someone to do my assignment, just need someone to point me in the right direction. baby steps.

问题 I am trying to create an automatic process which will synchronize the databases of two servers. One site is live, and I need the testing environment to sync up with the live site every so often (I am thinking a cron job for that). How can I implement this? 回答1: You can keep the systems up to date with MySQL replication http://dev.mysql.com/doc/refman/5.0/en/replication.html You are basically looking at a Master-Slave configuration If you'd like something a little simpler, you can use

问题 I have a producer and a consumer. Producer fills its internal queue with objects, consumer takes these objects one by one. I want to synchronize the cosumer with the producer, so that the consumer blocks when there are no objects ready, and I want to synchronize the producer with itself, so that it stops producing when the queue is full (and starts again when there’s space). How do I do that? I was able to solve a simpler case without the queue using NSConditionalLock , but with the queue the

问题 I am looking for an inter-processes barrier implementation. Processes are in shared memory (ie. on the same ndoe). Processes are MPI ones. I do not want to use the MPI_Barrier function, because the general policy for all the MPI implementation is active waiting. I want my processes sleeping as long as they wait. The restrictions: should be in C, maybe in C++ no spinlock, so it could use semaphore linux OS I am confident it exists thousands of barrier implementation, but I do not find any?!

问题 I am new on this so i do not find the answer on the internet or i am not sure if the answer is that. What i am trying to do is to make my app sync all the contacts in the native contact app like whatsapp or facebook does. I also wanted to link contacts. Any hint or tutorial would be great. Something like this: What are the benefits of putting my app over there? I am very new on this. Please I hope an answer do not vote down D:. Any answer is welcome. 回答1: Account Manager requires several key

问题 Introduction Hi, I am going to ask a question which seems utopic for me, but I need to know if there is a way to achieve what I need. And if not, I need to know why not . The idea Suppose I have a database structure, in MySql . I want to create some solution to allow anyone (no matter who, no matter where) to have a synchronized copy (updated clone) of this database (with its content) Well, and it is not going to be just one synchronized copy, it could (and should) be a multiple replication

问题 I've to create a big directory where all users from multiple active directorys are referenced. I just need some few Informations like original DN and Name , maybe mail... I decided to build my trees like follows: [collector directory] | |-->[ OU <Name of Location1> ] -> [ {Objects Location1} ] | |-->[ OU <Name of Location2> ] -> [ {Objects Location2} ] I started by installing openldap on a debian system and created ldap export with ldapserch from and stored it in an .ldsi file. I read man

问题 It's possible to add the volatile modifier to a field that is private and static? Example Code // I don't know when test is initalized public class Test { private static String secretString; public Test() { secretString = "random"; } } public class ReflectionTest extends Thread { public void run() { Class<?> testClass = Class.forName("Test"); Field testField = testClass.getDeclaredField("secretString"); while (testField.get(null) == null) { // Sleep, i don't know when test is initalized //

问题 This is the Github Repository which I am using https://github.com/ilkerulutas/BinanceSdk The code is working fine on a console application but it takes too much time to get a response in windows form application. //Async Method public async Task<TimeResponse> Time() { return await SendRequest<TimeResponse>("time", ApiVersion.Version1, ApiMethodType.None, HttpMethod.Get); } //Sync Method public TimeResponse TimeSync() => Time().Result; I am calling both but async method is giving status