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//
// bind_cancellation_slot.cpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2025 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)
//
// 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/bind_cancellation_slot.hpp>
#include <functional>
#include <boost/asio/cancellation_signal.hpp>
#include <boost/asio/io_context.hpp>
#include <boost/asio/steady_timer.hpp>
#include "unit_test.hpp"
using namespace boost::asio;
namespace bindns = std;
typedef steady_timer timer;
namespace chronons = boost::asio::chrono;
void increment_on_cancel(int* count, const boost::system::error_code& error)
{
if (error == boost::asio::error::operation_aborted)
++(*count);
}
void bind_cancellation_slot_to_function_object_test()
{
io_context ioc;
cancellation_signal sig;
int count = 0;
timer t(ioc, chronons::seconds(5));
t.async_wait(
bind_cancellation_slot(sig.slot(),
bindns::bind(&increment_on_cancel,
&count, bindns::placeholders::_1)));
ioc.poll();
BOOST_ASIO_CHECK(count == 0);
sig.emit(boost::asio::cancellation_type::all);
ioc.run();
BOOST_ASIO_CHECK(count == 1);
t.async_wait(
bind_cancellation_slot(sig.slot(),
bind_cancellation_slot(sig.slot(),
bindns::bind(&increment_on_cancel,
&count, bindns::placeholders::_1))));
ioc.restart();
ioc.poll();
BOOST_ASIO_CHECK(count == 1);
sig.emit(boost::asio::cancellation_type::all);
ioc.run();
BOOST_ASIO_CHECK(count == 2);
}
struct incrementer_token_v1
{
explicit incrementer_token_v1(int* c) : count(c) {}
int* count;
};
struct incrementer_handler_v1
{
explicit incrementer_handler_v1(incrementer_token_v1 t) : count(t.count) {}
void operator()(boost::system::error_code error)
{
increment_on_cancel(count, error);
}
int* count;
};
namespace boost {
namespace asio {
template <>
class async_result<incrementer_token_v1, void(boost::system::error_code)>
{
public:
typedef incrementer_handler_v1 completion_handler_type;
typedef void return_type;
explicit async_result(completion_handler_type&) {}
return_type get() {}
};
} // namespace asio
} // namespace boost
void bind_cancellation_slot_to_completion_token_v1_test()
{
io_context ioc;
cancellation_signal sig;
int count = 0;
timer t(ioc, chronons::seconds(5));
t.async_wait(
bind_cancellation_slot(sig.slot(),
incrementer_token_v1(&count)));
ioc.poll();
BOOST_ASIO_CHECK(count == 0);
sig.emit(boost::asio::cancellation_type::all);
ioc.run();
BOOST_ASIO_CHECK(count == 1);
}
struct incrementer_token_v2
{
explicit incrementer_token_v2(int* c) : count(c) {}
int* count;
};
namespace boost {
namespace asio {
template <>
class async_result<incrementer_token_v2, void(boost::system::error_code)>
{
public:
#if !defined(BOOST_ASIO_HAS_RETURN_TYPE_DEDUCTION)
typedef void return_type;
#endif // !defined(BOOST_ASIO_HAS_RETURN_TYPE_DEDUCTION)
template <typename Initiation, typename... Args>
static void initiate(Initiation initiation,
incrementer_token_v2 token, Args&&... args)
{
initiation(
bindns::bind(&increment_on_cancel,
token.count, bindns::placeholders::_1),
static_cast<Args&&>(args)...);
}
};
} // namespace asio
} // namespace boost
void bind_cancellation_slot_to_completion_token_v2_test()
{
io_context ioc;
cancellation_signal sig;
int count = 0;
timer t(ioc, chronons::seconds(5));
t.async_wait(
bind_cancellation_slot(sig.slot(),
incrementer_token_v2(&count)));
ioc.poll();
BOOST_ASIO_CHECK(count == 0);
sig.emit(boost::asio::cancellation_type::all);
ioc.run();
BOOST_ASIO_CHECK(count == 1);
}
void partial_bind_cancellation_slot()
{
io_context ioc;
cancellation_signal sig;
int count = 0;
timer t(ioc, chronons::seconds(5));
t.async_wait(bind_cancellation_slot(sig.slot()))(
bindns::bind(&increment_on_cancel,
&count, bindns::placeholders::_1));
ioc.poll();
BOOST_ASIO_CHECK(count == 0);
sig.emit(boost::asio::cancellation_type::all);
ioc.run();
BOOST_ASIO_CHECK(count == 1);
t.async_wait()(
bind_cancellation_slot(sig.slot()))(
incrementer_token_v2(&count));
ioc.restart();
ioc.poll();
BOOST_ASIO_CHECK(count == 1);
sig.emit(boost::asio::cancellation_type::all);
ioc.run();
BOOST_ASIO_CHECK(count == 2);
}
BOOST_ASIO_TEST_SUITE
(
"bind_cancellation_slot",
BOOST_ASIO_TEST_CASE(bind_cancellation_slot_to_function_object_test)
BOOST_ASIO_TEST_CASE(bind_cancellation_slot_to_completion_token_v1_test)
BOOST_ASIO_TEST_CASE(bind_cancellation_slot_to_completion_token_v2_test)
BOOST_ASIO_TEST_CASE(partial_bind_cancellation_slot)
)
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