CoroutineCPP is a wrapper for epoll and socket which is implemented with C++20. It supports the syntax of coroutine and can be easily used out of box.
- coroutine supported
If you use CMake for your project. All you need is adding some code to your CMakeLists.txt and add coroutinecpp as a dependency.
add_subdirectory(coroutinecpp)
target_link_library(<your_project> PUBLIC coroutinecpp)You can write a echo server like this.
co_cpp::Task<void> echo(co_cpp::Socket sock)
{
auto &ctx = co_await this_core::excutor;
while (true)
{
auto [content, ok_read] = co_await sock.read();
if (!ok_read)
{
co_cpp::log("return code:", ok_read);
co_return;
}
auto [len, ok_write] = co_await sock.write(content);
if (!ok_write)
{
co_cpp::log("return code:", ok_write);
co_return;
}
}
}
co_cpp::Task<void> listen(co_cpp::Socket sock)
{
auto &ctx = co_await this_core::excutor;
while (true)
{
auto [sock_fd, ok] = co_await sock.accept();
if (!ok)
{
co_return;
}
co_cpp::co_spawn(ctx, echo(co_cpp::Socket{ctx,sock_fd}));
}
}
int main()
{
co_cpp::IOContext ctx;
co_cpp::Socket socket(ctx);
socket.bind(8080);
co_cpp::co_spawn(ctx, listen(std::move(socket)));
ctx.run();
return 0;
}
Getting the context in your coroutine frame is easy, just use co_await this_core::excutor, the reference of context is returned immediately.
co_cpp::Task<T> holds the promise_type which is needed in coroutine. Forget the promise_type, the lifetime is handled well by Task and IOContext.
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