Wednesday, July 29, 2009

Wife says: "I can't believe it works"

Just a teaser:

int main()
{
try
{
using asio::ip::tcp;
using namespace boost::lambda;

asio::io_service io_service;
tcp::acceptor acceptor(io_service,
tcp::endpoint(tcp::v4(), 54321));

const int max_clients = 100;
coroutine coro[max_clients];
std::auto_ptr<tcp::socket> socket[max_clients];
asio::error_code ec[max_clients];
std::size_t length[max_clients];
boost::array<char, 1024> data[max_clients];

// Kick off all the coroutines.
int n = -1;
for (int i = 0; i < max_clients; ++i)
{
socket[i].reset(new tcp::socket(io_service));
io_service.post(
unlambda((
var(n) = i
)));
}

for (; io_service.run_one() > 0; n = -1)
{
if (n != -1)
{
reenter (coro[n])
{
entry:
for (;;)
{
// Wait for a client to connect.
yield acceptor.async_accept(
*socket[n],
unlambda((
var(n) = n,
var(ec[n]) = _1
)));

// Echo at will.
while (!ec[n])
{
yield socket[n]->async_read_some(
asio::buffer(data[n]),
unlambda((
var(n) = n,
var(ec[n]) = _1,
var(length[n]) = _2
)));

if (!ec[n])
{
yield asio::async_write(
*socket[n],
asio::buffer(data[n], length[n]),
unlambda((
var(n) = n,
var(ec[n]) = _1
)));
}
}

// Clean up before accepting next client.
socket[n]->close();
}
}
}
}
}
catch (std::exception& e)
{
std::cerr << "Exception: " << e.what() << "\n";
}
}

One function. One fully asynchronous server. Bog standard C++.

15 comments:

macbirdie said...

Cute!

Thanks for boost::asio by the way!

Anonymous said...

yield in c++?

wait, what compiler is this using?

chris said...

Tested with: g++ 3.4.5, 4.1, 4.3 and 4.4; MSVC 8.0 and 9.0.

Obviously there's a little bit of something not shown in the snippet :)

Anonymous said...

I envy the fact that your wife understands enough about what you do to not understand how that works :~(

Gryffin said...

Thanks for this. learning a little more on asio. http://www.directics.com/altera/

john said...

آهنگ جدید
امین کامی ثابتی تو قلب من
دانلود آهنگ آصف آریا هیس
آهنگ کارن کیان دلتنگتم این روزا

youtube channel said...

What a good blog you have here. Please update it more often. This topics is my interest. Thank you. .

토토사이트
온라인카지노
파워볼사이트

dermatologist said...

I want to say thanks for beautiful blog sharing with us. Your blog really great resource to update my knowledge

스포츠토토
토토
안전놀이터
토토사이트

directory bristolpost said...

Thanks for providing recent updates regarding the concern, I look forward to read more

토토사이트
온라인카지노
파워볼게임
바카라사이트

토토사이트추천 said...

This is such a great resource that you are providing and you give it away for free. I love seeing blog that understand the value. Im glad to have found this post as its such an interesting one! I am always on the lookout for quality posts and articles so i suppose im lucky to have found this! I hope you will be adding more in the future. 토토사이트추천

메이저놀이터 said...

Hello, I'm happy to see some great articles on your site. Would you like to come to my site later? My site also has posts, comments and communities similar to yours. Please visit and take a look 메이저놀이터

안전놀이터추천 said...

Hello, I read the post well. 안전놀이터추천 It's a really interesting topic and it has helped me a lot. In fact, I also run a website with similar content to your posting. Please visit once

casinositeone.JDS said...


I was very pleased to find this page. I wanted to thank you for your time due to this wonderful read!!
카지노사이트원
카지노사이트
바카라사이트

casinosite777infoJDS said...

I definitely loved every part of it and I have you bookmarked to check out new information on your blog.
카지노사이트777
카지노사이트
바카라사이트

casinositezoneJDS said...


Positive site, where did u come up with the information on this posting?I have read a few of the articles on your website now, and I really like your style.
카지노사이트존
카지노사이트
바카라사이트