2025-01-12 20:37:50 +08:00

227 lines
5.5 KiB
C++

//
// promise.cpp
// ~~~~~~~~~~~
//
// Copyright (c) 2021-2023 Klemens D. Morgenstern
// (klemens dot morgenstern at gmx dot net)
//
// 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)
//
// Disable autolinking for unit tests.
#if !defined(BOOST_ALL_NO_LIB)
#define BOOST_ALL_NO_LIB 1
#endif // !defined(BOOST_ALL_NO_LIB)
// Test that header file is self-contained.
#include <boost/asio/experimental/promise.hpp>
#include <boost/asio/append.hpp>
#include <boost/asio/bind_cancellation_slot.hpp>
#include <boost/asio/compose.hpp>
#include <boost/asio/deferred.hpp>
#include <boost/asio/experimental/use_promise.hpp>
#include <boost/asio/steady_timer.hpp>
#include "../unit_test.hpp"
namespace promise {
void promise_tester()
{
using namespace boost::asio;
using namespace std::chrono;
io_context ctx;
steady_timer timer1{ctx}, timer2{ctx};
const auto started_when = steady_clock::now();
timer1.expires_at(started_when + milliseconds(5000));
timer2.expires_at(started_when + milliseconds(1000));
auto p1 = timer1.async_wait(experimental::use_promise);
steady_clock::time_point completed_when;
boost::system::error_code ec;
bool called = false;
p1([&](boost::system::error_code ec_)
{
ec = ec_;
called = true;
completed_when = steady_clock::now();
});
steady_clock::time_point timer2_done;
timer2.async_wait(
[&](boost::system::error_code)
{
timer2_done = steady_clock::now();
p1.cancel();
});
ctx.run();
static_assert(
boost::asio::is_async_operation<decltype(p1)>::value,
"promise is async_op");
BOOST_ASIO_CHECK(timer2_done + milliseconds(1) > started_when);
BOOST_ASIO_CHECK(completed_when > timer2_done);
BOOST_ASIO_CHECK(called);
BOOST_ASIO_CHECK(ec == error::operation_aborted);
timer1.expires_after(milliseconds(0));
auto p2 = timer1.async_wait(
boost::asio::append(experimental::use_promise, 123));
ec = boost::asio::error::would_block;
called = false;
p2([&](boost::system::error_code ec_, int i)
{
BOOST_ASIO_CHECK(i == 123);
ec = ec_;
called = true;
});
BOOST_ASIO_CHECK(ec == boost::asio::error::would_block);
BOOST_ASIO_CHECK(!called);
ctx.restart();
ctx.run();
static_assert(
boost::asio::is_async_operation<decltype(p2)>::value,
"promise is async_op");
BOOST_ASIO_CHECK(!ec);
BOOST_ASIO_CHECK(called);
}
void promise_slot_tester()
{
using namespace boost::asio;
using namespace std::chrono;
io_context ctx;
steady_timer timer1{ctx}, timer2{ctx};
const auto started_when = steady_clock::now();
timer1.expires_at(started_when + milliseconds(2500));
timer2.expires_at(started_when + milliseconds(1000));
auto p = timer1.async_wait(experimental::use_promise);
steady_clock::time_point completed_when;
boost::system::error_code ec;
bool called = false;
boost::asio::cancellation_signal sig;
p(boost::asio::bind_cancellation_slot(
sig.slot(),
[&](boost::system::error_code ec_)
{
ec = ec_;
called = true;
completed_when = steady_clock::now();
}));
steady_clock::time_point timer2_done;
timer2.async_wait(
[&](boost::system::error_code)
{
timer2_done = steady_clock::now();
sig.emit(boost::asio::cancellation_type::all);
});
ctx.run();
static_assert(
boost::asio::is_async_operation<decltype(p)>::value,
"promise is async_op");
BOOST_ASIO_CHECK(timer2_done + milliseconds(1) > started_when);
BOOST_ASIO_CHECK(completed_when > timer2_done);
BOOST_ASIO_CHECK(called);
BOOST_ASIO_CHECK(ec == error::operation_aborted);
}
void early_completion()
{
using namespace boost::asio;
using namespace std::chrono;
io_context ctx;
auto p = boost::asio::post(ctx, boost::asio::experimental::use_promise);
ctx.run();
BOOST_ASIO_CHECK(p.completed());
bool completed = false;
p([&]{completed = true;});
BOOST_ASIO_CHECK(!completed);
ctx.restart();
ctx.run();
BOOST_ASIO_CHECK(completed);
}
struct test_cancel_impl_op
{
boost::asio::steady_timer & tim;
boost::system::error_code &ec;
template<typename Self>
void operator()(Self& self)
{
tim.async_wait(std::forward<Self>(self));
}
template<typename Self>
void operator()(Self& self, boost::system::error_code ec_)
{
ec = ec_;
self.complete(ec_);
}
};
template <typename CompletionToken>
BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(
CompletionToken, void(boost::system::error_code))
test_cancel_impl(boost::asio::steady_timer & tim,
boost::system::error_code &ec,
CompletionToken&& token)
{
return boost::asio::async_compose<CompletionToken, void(boost::system::error_code)>(
test_cancel_impl_op{tim, ec}, token, tim);
}
void test_cancel()
{
boost::asio::io_context ctx;
boost::asio::steady_timer tim{ctx, std::chrono::seconds(10)};
boost::system::error_code ec;
{
auto p = test_cancel_impl(
tim, ec, boost::asio::experimental::use_promise);
}
ctx.run();
BOOST_ASIO_CHECK_MESSAGE(
ec == boost::asio::error::operation_aborted,
ec.message());
}
} // namespace promise
BOOST_ASIO_TEST_SUITE
(
"promise",
BOOST_ASIO_TEST_CASE(promise::promise_tester)
BOOST_ASIO_TEST_CASE(promise::promise_slot_tester)
BOOST_ASIO_TEST_CASE(promise::early_completion)
BOOST_ASIO_TEST_CASE(promise::test_cancel)
)