| 55 | } |
| 56 | |
| 57 | void accept() |
| 58 | { |
| 59 | acceptor_.async_accept( |
| 60 | [this](boost::system::error_code ec, tcp::socket new_socket) |
| 61 | { |
| 62 | if (!ec) |
| 63 | { |
| 64 | // Take ownership of the newly accepted socket. |
| 65 | socket_ = std::move(new_socket); |
| 66 | |
| 67 | // Inform the io_context that we are about to fork. The io_context |
| 68 | // cleans up any internal resources, such as threads, that may |
| 69 | // interfere with forking. |
| 70 | io_context_.notify_fork(boost::asio::io_context::fork_prepare); |
| 71 | |
| 72 | if (fork() == 0) |
| 73 | { |
| 74 | // Inform the io_context that the fork is finished and that this |
| 75 | // is the child process. The io_context uses this opportunity to |
| 76 | // create any internal file descriptors that must be private to |
| 77 | // the new process. |
| 78 | io_context_.notify_fork(boost::asio::io_context::fork_child); |
| 79 | |
| 80 | // The child won't be accepting new connections, so we can close |
| 81 | // the acceptor. It remains open in the parent. |
| 82 | acceptor_.close(); |
| 83 | |
| 84 | // The child process is not interested in processing the SIGCHLD |
| 85 | // signal. |
| 86 | signal_.cancel(); |
| 87 | |
| 88 | read(); |
| 89 | } |
| 90 | else |
| 91 | { |
| 92 | |
| 93 | // Inform the io_context that the fork is finished (or failed) |
| 94 | // and that this is the parent process. The io_context uses this |
| 95 | // opportunity to recreate any internal resources that were |
| 96 | // cleaned up during preparation for the fork. |
| 97 | io_context_.notify_fork(boost::asio::io_context::fork_parent); |
| 98 | |
| 99 | // The parent process can now close the newly accepted socket. It |
| 100 | // remains open in the child. |
| 101 | socket_.close(); |
| 102 | |
| 103 | accept(); |
| 104 | } |
| 105 | } |
| 106 | else |
| 107 | { |
| 108 | std::cerr << "Accept error: " << ec.message() << std::endl; |
| 109 | accept(); |
| 110 | } |
| 111 | }); |
| 112 | } |
| 113 | |
| 114 | void read() |
nothing calls this directly
no test coverage detected