CODEWITHSUNDEEP
c++windowsboost-asio
Al Kurlansky
Al Kurlansky

Reputation: 307

interrupting boost::asio::async_receive_from from another thread

I am reading multicast input using async_receive_from. So the idea is that when I detect a gap, I will notify another helper thread to request/get the gap filling messages. While this is in the works the main thread will continue to receive and queue any incoming messages. This part I can implement. The other thread can use waitforsingleobject and I can pass it the details through shared memory and notify an event to wake it up.

But once it completes it task, how do I get the helper thread to interrupt the async_receive_from in the initiating thread? And when it comes up out of the the read it knows who interrupted so it will then know what to do next?

Upvotes: 0

Views: 829

Answers (1)

Nim
Nim

Reputation: 33655

Why are you using shared memory between threads?

That aside, the mechanism you should use for executing something in the context of the io_service which is managing the socket is post(). You can post any arbitrary event to the io_service, and it will execute in that context. Quite easy really... Because you are calling async_receive_from, it's not blocking, i.e. the io_service can dispatch other events, which is why the post will work.

Upvotes: 1

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