C ++非阻塞ASIO运行 [英] C++ Non-Blocking ASIO Run

问题描述

我创建了一系列跟多的libcurl并通过ASIO异步下载文件和Boost功能。

I have created a series of functions that talk to Libcurl Multi and download files asynchronously via ASIO and Boost.

显然，虽然当我打电话io_service.run它阻止我的主线程在运行时。我曾试图使它非阻塞，但我的应用程序崩溃。

Obviously though when I call io_service.run it blocks my main thread when it is run. I have tried to make it non blocking but my app crashes.

我想知道什么是在后台运行这一点，在非阻塞的方式最简单，最好的方法，并调用它，当它完成一个回调函数（像你如何能做到这在JavaScript）。

I was wondering what is the simplest and best approach to running this in the background, in a non-blocking manner and have it call a call-back function when it is done (Like how you can do it in javascript).

所以，我可以只是去：

Runthisinthebackground( thingtodo, callback); 

有将运行thingtodo并将结果返回到回调。但有一件事这必须使用库，比如可以在与出C ++ 11作为其设备的移动应用程序在Android和iOS上运行运行提升

It would run the thingtodo and return the result to the callback. One thing though this must use Libraries such as boost that can run on devices with out C++ 11 as its for a mobile app running on Android and iOS

推荐答案

运行 io_service对象在另一个线程和后它的功能：

Run io_service in another thread and post to it your functions:

asio::io_service io_service;
// give it some work, to prevent premature exit
shared_ptr<asio::io_service::work> work(new asio::io_service::work(io_service));
boost::thread t(&asio::io_service::run, &io_service);
t.detach();
//...
io_service.post(yourFunctor); // yourFunctor will be executed in the separate thread

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