How does the C++ thread understand

This article mainly introduces "how to understand C++ threads". In daily operation, I believe many people have doubts about how to understand C++ threads. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful to answer the questions of "how do C++ threads understand"! Next, please follow the editor to study!

CP.4: think in terms of tasks, not threads

Reason (reason)

Threading is a concept at the implementation level, a way to understand machine action. A task is an application-level concept, and you want it to be executed concurrently with other tasks. The concept of application is easier to understand.

Example (sample)

Void some_fun ()

{

Std::string msg, msg2

Std::thread publisher ([&] {msg = "Hello";}); / / bad: less expressive

/ / and more error-prone

Auto pubtask = std::async ([&] {msg2 = "Hello";}); / / OK

/ /...

Publisher.join ()

}

Note (Note)

Except for async (), the standard library features are low-level, machine-oriented, thread / lock-level. These are necessary as foundations, but we must strive to raise the level of abstraction: for productivity, for reliability, and for performance. This is a topic that has a significant impact on the use of higher-level, more application-oriented libraries (building them on top of the annotation library functionality, if possible).

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