template<>classfuture<void>; (3)(since C++11) The class templatestd::futureprovides a mechanism to access the result of asynchronous operations: An asynchronous operation (created viastd::async,std::packaged_tas
~future(); (C++11 起) 释放任何共享状态。这表示 如果当前对象持有其共享状态的最后一个引用,那么就会销毁共享状态。 当前对象放弃它的共享状态的引用。 而这些操作不会阻塞等待共享状态变为就绪,但在满足以下所有条件时这些操作可能会阻塞: 共享状态是由对 std::async 的调用创建的。 共享状态尚未就绪。
future::valid future::wait future::wait_for future::wait_untilfuture() noexcept; (1) (since C++11) future( future&& other ) noexcept; (2) (since C++11) future( const future& other ) = delete; (3) (since C++11) Constructs a std::future object. 1...
std::future<void>specialization voidget(); (3)(since C++11) Thegetmember function waits (by callingwait()) until the shared state is ready, then retrieves the value stored in the shared state (if any). Right after calling this function,valid()isfalse. ...
std::async 是C++11 引入的一个函数模板,用于异步地执行一个函数,并返回一个 std::future 对象,该对象可用于获取函数的执行结果。 2. 参数 std::async 有两个主要的参数形式: std::future<typename std::result_of<F(Args...)>::type> async(F&& f, Args&&... ...
External Links−Non-ANSI/ISO Libraries−Index−std Symbol Index C reference C89,C95,C99,C11,C17,C23│Compiler supportC99,C23 Language Basic concepts Keywords Preprocessor Expressions Declaration Initialization Functions Statements Headers Type support ...
#include <iostream>#include <future>#include <thread>intmain(){// future from a packaged_taskstd::packaged_task<int()>task([](){return7;});// wrap the functionstd::future<int>f1=task.get_future();// get a futurestd::thread(std::move(task)).detach();// launch on a thread//...
std::future<typenamestd::result_of<Function(Args...)>::type> async(std::launchpolicy, Function&&f, Args&&...args); (2)(seit C++11) Die Template-Funktionasyncführt die Funktionfasynchron (möglicherweise in einem separaten Thread) und gibt einenstd::future, die schließlich halten ...
The asynchronous ones use the hazelcast::client::Future<T> future object. It works similar to the std::future.If you are ready to go, let's start to use Hazelcast C++ client!The first step is the configuration. You can configure the C++ client programmatically. See the Programmatic ...
double func(int val); // 使用std::async创建异步任务 // 使用std::future获取结果 // future模板中存放返回值类型 std::future<double> result = std::async(func, 5); 获取异步任务的返回值 等待异步任务结束,但是不获取返回值: result.wait(); 获取异步任务的返回值: int val = result.get(); ...