summaryrefslogtreecommitdiffstatshomepage
path: root/3rdparty/asio/src/examples/cpp03/timeouts/blocking_udp_client.cpp
diff options
context:
space:
mode:
Diffstat (limited to '3rdparty/asio/src/examples/cpp03/timeouts/blocking_udp_client.cpp')
-rw-r--r--3rdparty/asio/src/examples/cpp03/timeouts/blocking_udp_client.cpp182
1 files changed, 0 insertions, 182 deletions
diff --git a/3rdparty/asio/src/examples/cpp03/timeouts/blocking_udp_client.cpp b/3rdparty/asio/src/examples/cpp03/timeouts/blocking_udp_client.cpp
deleted file mode 100644
index fd2da7640b8..00000000000
--- a/3rdparty/asio/src/examples/cpp03/timeouts/blocking_udp_client.cpp
+++ /dev/null
@@ -1,182 +0,0 @@
-//
-// blocking_udp_client.cpp
-// ~~~~~~~~~~~~~~~~~~~~~~~
-//
-// Copyright (c) 2003-2016 Christopher M. Kohlhoff (chris at kohlhoff dot com)
-//
-// Distributed under the Boost Software License, Version 1.0. (See accompanying
-// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-//
-
-#include "asio/deadline_timer.hpp"
-#include "asio/io_context.hpp"
-#include "asio/ip/udp.hpp"
-#include <cstdlib>
-#include <boost/bind.hpp>
-#include <boost/date_time/posix_time/posix_time_types.hpp>
-#include <iostream>
-
-using asio::deadline_timer;
-using asio::ip::udp;
-
-//----------------------------------------------------------------------
-
-//
-// This class manages socket timeouts by applying the concept of a deadline.
-// Each asynchronous operation is given a deadline by which it must complete.
-// Deadlines are enforced by an "actor" that persists for the lifetime of the
-// client object:
-//
-// +----------------+
-// | |
-// | check_deadline |<---+
-// | | |
-// +----------------+ | async_wait()
-// | |
-// +---------+
-//
-// If the actor determines that the deadline has expired, any outstanding
-// socket operations are cancelled. The socket operations themselves are
-// implemented as transient actors:
-//
-// +---------------+
-// | |
-// | receive |
-// | |
-// +---------------+
-// |
-// async_- | +----------------+
-// receive() | | |
-// +--->| handle_receive |
-// | |
-// +----------------+
-//
-// The client object runs the io_context to block thread execution until the
-// actor completes.
-//
-class client
-{
-public:
- client(const udp::endpoint& listen_endpoint)
- : socket_(io_context_, listen_endpoint),
- deadline_(io_context_)
- {
- // No deadline is required until the first socket operation is started. We
- // set the deadline to positive infinity so that the actor takes no action
- // until a specific deadline is set.
- deadline_.expires_at(boost::posix_time::pos_infin);
-
- // Start the persistent actor that checks for deadline expiry.
- check_deadline();
- }
-
- std::size_t receive(const asio::mutable_buffer& buffer,
- boost::posix_time::time_duration timeout, asio::error_code& ec)
- {
- // Set a deadline for the asynchronous operation.
- deadline_.expires_from_now(timeout);
-
- // Set up the variables that receive the result of the asynchronous
- // operation. The error code is set to would_block to signal that the
- // operation is incomplete. Asio guarantees that its asynchronous
- // operations will never fail with would_block, so any other value in
- // ec indicates completion.
- ec = asio::error::would_block;
- std::size_t length = 0;
-
- // Start the asynchronous operation itself. The handle_receive function
- // used as a callback will update the ec and length variables.
- socket_.async_receive(asio::buffer(buffer),
- boost::bind(&client::handle_receive, _1, _2, &ec, &length));
-
- // Block until the asynchronous operation has completed.
- do io_context_.run_one(); while (ec == asio::error::would_block);
-
- return length;
- }
-
-private:
- void check_deadline()
- {
- // Check whether the deadline has passed. We compare the deadline against
- // the current time since a new asynchronous operation may have moved the
- // deadline before this actor had a chance to run.
- if (deadline_.expires_at() <= deadline_timer::traits_type::now())
- {
- // The deadline has passed. The outstanding asynchronous operation needs
- // to be cancelled so that the blocked receive() function will return.
- //
- // Please note that cancel() has portability issues on some versions of
- // Microsoft Windows, and it may be necessary to use close() instead.
- // Consult the documentation for cancel() for further information.
- socket_.cancel();
-
- // There is no longer an active deadline. The expiry is set to positive
- // infinity so that the actor takes no action until a new deadline is set.
- deadline_.expires_at(boost::posix_time::pos_infin);
- }
-
- // Put the actor back to sleep.
- deadline_.async_wait(boost::bind(&client::check_deadline, this));
- }
-
- static void handle_receive(
- const asio::error_code& ec, std::size_t length,
- asio::error_code* out_ec, std::size_t* out_length)
- {
- *out_ec = ec;
- *out_length = length;
- }
-
-private:
- asio::io_context io_context_;
- udp::socket socket_;
- deadline_timer deadline_;
-};
-
-//----------------------------------------------------------------------
-
-int main(int argc, char* argv[])
-{
- try
- {
- using namespace std; // For atoi.
-
- if (argc != 3)
- {
- std::cerr << "Usage: blocking_udp_timeout <listen_addr> <listen_port>\n";
- return 1;
- }
-
- udp::endpoint listen_endpoint(
- asio::ip::make_address(argv[1]),
- std::atoi(argv[2]));
-
- client c(listen_endpoint);
-
- for (;;)
- {
- char data[1024];
- asio::error_code ec;
- std::size_t n = c.receive(asio::buffer(data),
- boost::posix_time::seconds(10), ec);
-
- if (ec)
- {
- std::cout << "Receive error: " << ec.message() << "\n";
- }
- else
- {
- std::cout << "Received: ";
- std::cout.write(data, n);
- std::cout << "\n";
- }
- }
- }
- catch (std::exception& e)
- {
- std::cerr << "Exception: " << e.what() << "\n";
- }
-
- return 0;
-}