Why do I need strand per connection when using boost::asio?

Question

I\'m reviewing HTTP Server 3 example on Boost\'s website.

Could you guys please explain why I need strand per connection ? As I can see we call re

Answer 1

I believe it is because the composed operation async_write. async_write is composed of multiple socket::async_write_some asynchronously. Strand is helpful to serialize those operations. Chris Kohlhoff, the author of asio, talks about it briefly in his boostcon talk at around 1:17.