http://duoduokou.com/cplusplus/17734810148746010878.html WebApr 11, 2024 · 上述例子中的第二个线程就会在get()处等待第一个线程中的promise使用set_value(int)设置值后再开始下面代码的执行,这就实现了线程间的通信功能,工作中自己写多线程thread用的还是多一点,有天在github上看到c++线程池的实现用的是std::async,就查了下相关知识记录一下。
::promise - cplusplus.com
WebFutures and Promises. std::future and std::promise were introduced in C++11's concurrency API as the two ends of a read-write channel.std::future represents the consumer/read-end and std::promise the producer/write-end.. A std::future object may be created either by a call to std::async or through a std::packaged_task or a … WebFeb 5, 2024 · std:: promise. std:: promise. 2) non-void specialization, used to communicate objects between threads. 3) void specialization, used to communicate stateless events. The class template std::promise provides a facility to store a value or … atomic_compare_exchange_weak atomic_compare_exchange_weak_explicit … 2) Constructs the promise with an empty shared state. The shared state is … The class template std::future provides a mechanism to access the result of … The lookup for the identifier swap in the exception specification finds this … The operation behaves as though set_value, set_exception, … chip gratis antivirus
C++ : What is std::promise? - YouTube
WebFutures and Promises. Promises and Futures are used to ferry a single object from one thread to another. A std::promise object is set by the thread which generates the result. A std::future object can be used to retrieve a value, to test to see if a value is available, or to halt execution until the value is available. WebJun 12, 2012 · std::promise is the channel or pathway for information to be returned from the async function. std::future is the synchronization mechanism thats makes the caller … WebThe std::all_of () function is a STL Algorithm in C++. It can be used to check if all the elements of a sequence satisfies a condition or not. The sequence can be a vector, array, list or any other sequential container. We need to include the header file to use the std::all_of () function. chip gratis download