ThreadPool(size_t);//构造函数,size_t n 表示连接数template<classF,class... Args>auto enqueue(F&& f, Args&&... args)//任务管道函数-> std::future<typename std::result_of<F(Args...)>::type>;//利用尾置限定符 std future用来获取异步任务的结果~ThreadPool();private://need to keep tra...
java的线程池支持主要通过ThreadPoolExecutor来实现,我们使用的ExecutorService的各种线程池策略都是基于ThreadPoolExecutor实现的,所以ThreadPoolExecutor十分重要。要弄明白各种线程池策略,必须先弄明白ThreadPoolExecutor。 1. 实现原理 首先看一个线程池的流程图: Paste_Image.png step1.调用ThreadPoolExecutor的execute提交...
importjava.util.concurrent.ArrayBlockingQueue;importjava.util.concurrent.Executors;importjava.util.concurrent.ThreadFactory;importjava.util.concurrent.ThreadPoolExecutor;importjava.util.concurrent.TimeUnit;publicclassWorkerPool{publicstaticvoidmain(String args[])throwsInterruptedException{//RejectedExecutionHandler ...
corePoolSize: 线程池核心线程数(平时保留的线程数),使用时机: 在初始时刻,每次请求进来都会创建一个线程直到达到该size maximumPoolSize: 线程池最大线程数,使用时机: 当workQueue都放不下时,启动新线程,直到最大线程数,此时到达线程池的极限 keepAliveTime/unit: 超出corePoolSize数量的线程的保留时间,unit为时间...
int c = ctl.get(); // workerCountOf(c)取出低29位的值即当前活动的线程数,如果小于corePoolSize, // 则新建一工作线程放入线程池中,并将该线程用来执行当前任务 if (workerCountOf(c)<corePoolSize){ //addWorker中的第二个参数表示限制添加线程的数量是根据corePoolSize来判断还是maximumPoolSize来判断; ...
Submit implementation The complete submit functions looks like this: // Submit a function to be executed asynchronously by the pooltemplate<typenameF,typename...Args>autosubmit(F&&f,Args&&...args)->std::future<decltype(f(args...))>{// Create a function with bounded parameters ready to execu...
CThreadPool::CThreadPool The constructor for the thread pool. CThreadPool::~CThreadPool The destructor for the thread pool. Public Methods 展開表格 Name Description CThreadPool::AddRef Implementation of IUnknown::AddRef. CThreadPool::GetNumThreads Call this method to get the number of threa...
The most important method of the thread pool is the one responsible of adding work to the queue. I called this method submit. It's not difficult to understand how it works but its implementation can seem scary at first. Let's think about what should do and after that we will worry abou...
public class CustomScheduledExecutor extends ScheduledThreadPoolExecutor { static class CustomTask<V> implements RunnableScheduledFuture<V> { ... } protected <V> RunnableScheduledFuture<V> decorateTask( Runnable r, RunnableScheduledFuture<V> task) { return new CustomTask<V>(r, task); } protected <...
You can create a thread pool through the following construction methods (in fact, there are other constructors, you can go deep into the source code to view, but in the end they are all calling the following constructor to create a thread pool); ...