multithreading

问题 I am trying to write a OpenMp program. I have a for loop which iterates 100 times. I have divided that into 10 threads. Each thread runs 10 iterations and generates some count based on some condition. So as per this logic each thread will generate its own count. All I want is to copy this count to a variable which will hold the sum of all counts from all threads. If we make this variable(shared) to write in the loop, I guess it will serialize the threads. I just want to copy the last count of

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 5 days ago . My blocking ring queue don't use lock or Mutex , only two SemaphoreSlim (block than 0 and than max element, so write and read part of array never intersects) and two int indexes modified by Interlocked.Decrement (not determine write/read index, but make it unique and correct move).

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 5 days ago . My blocking ring queue don't use lock or Mutex , only two SemaphoreSlim (block than 0 and than max element, so write and read part of array never intersects) and two int indexes modified by Interlocked.Decrement (not determine write/read index, but make it unique and correct move).

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 5 days ago . My blocking ring queue don't use lock or Mutex , only two SemaphoreSlim (block than 0 and than max element, so write and read part of array never intersects) and two int indexes modified by Interlocked.Decrement (not determine write/read index, but make it unique and correct move).

问题 I have 2 threads running in the same function. I want to edit the data structures later in the code, but I want to make sure that both the threads have read the data and any future changes in the dict_list and ans_list will not be read by these threads. I was thinking of making use of commands such as wait() and notify() just before mutex.acquire() but since both the threads are using the same function, the second thread will have to wait for a notify that will never come. How can I approach

问题 Background Workflow: I have a client (jquery/ajax html page) calling our RESTful WebAPI to get some data (Patient 'encounters' - e.g. admission to a hospital, visit to a clinic, etc.). e.g. public async Task<string> GetEncounters(string patientId) { PatientChart patientChart = await _myService.GetPatientChart(patientId); string message = string.Empty; if (patientChart.Encounters.Status == PatientChart.StatusNotApplicable) { message = "List of Encounters is not available. A request has been

问题 Folks so my problem is that I have 3 Threads. 1Thread(Bot1) public class Bot1 implements Runnable { String name; public Bot1(String s) throws Exception{ ChatterBotFactory factory = new ChatterBotFactory(); ChatterBot bot1 = factory.create(ChatterBotType.CLEVERBOT); ChatterBotSession bot1session = bot1.createSession(); name=s; name=bot1session.think(s); } public void run(){ System.out.println("b1: "+name); } } And the others are same. Only names are Bot2 and Bot3 . But the code is almost same.

问题 Folks so my problem is that I have 3 Threads. 1Thread(Bot1) public class Bot1 implements Runnable { String name; public Bot1(String s) throws Exception{ ChatterBotFactory factory = new ChatterBotFactory(); ChatterBot bot1 = factory.create(ChatterBotType.CLEVERBOT); ChatterBotSession bot1session = bot1.createSession(); name=s; name=bot1session.think(s); } public void run(){ System.out.println("b1: "+name); } } And the others are same. Only names are Bot2 and Bot3 . But the code is almost same.

问题 Currently i am troubling that how to get data from database inside my thread class. I can't make bean of my thread class because new instance is created of thread on every request. MyThread.class class MyThread implements Runnable{ public void run(){ //How to get Employee data and also data from other tables.?????? } } EmployeeDAO.class @Component("employeeDAO") public class EmployeeDAO { @Cacheable(value = "employeeCache") public List<Employee> getEmployees() { //got data from database

问题 I know in a multithread environment doing this is not safe: if (some_var > 0) { // Do something. } Because when comparing, there might be another thread changing the value. What if some_var is a counter. That is, it can only increment, never decreases. Then is following operation thread safe? if(some_counter >0) { // Do something. } Also does it make difference if some_counter is either byte, or int32, int64? 回答1: What if some_var is a counter. That is, it can only increment, never decreases.