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- //
- // io_context.cpp
- // ~~~~~~~~~~~~~~
- //
- // Copyright (c) 2003-2019 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/io_context.hpp>
- #include <sstream>
- #include <boost/asio/bind_executor.hpp>
- #include <boost/asio/dispatch.hpp>
- #include <boost/asio/post.hpp>
- #include <boost/asio/detail/thread.hpp>
- #include "unit_test.hpp"
- #if defined(BOOST_ASIO_HAS_BOOST_DATE_TIME)
- # include <boost/asio/deadline_timer.hpp>
- #else // defined(BOOST_ASIO_HAS_BOOST_DATE_TIME)
- # include <boost/asio/steady_timer.hpp>
- #endif // defined(BOOST_ASIO_HAS_BOOST_DATE_TIME)
- #if defined(BOOST_ASIO_HAS_BOOST_BIND)
- # include <boost/bind.hpp>
- #else // defined(BOOST_ASIO_HAS_BOOST_BIND)
- # include <functional>
- #endif // defined(BOOST_ASIO_HAS_BOOST_BIND)
- using namespace boost::asio;
- #if defined(BOOST_ASIO_HAS_BOOST_BIND)
- namespace bindns = boost;
- #else // defined(BOOST_ASIO_HAS_BOOST_BIND)
- namespace bindns = std;
- #endif
- #if defined(BOOST_ASIO_HAS_BOOST_DATE_TIME)
- typedef deadline_timer timer;
- namespace chronons = boost::posix_time;
- #elif defined(BOOST_ASIO_HAS_CHRONO)
- typedef steady_timer timer;
- namespace chronons = boost::asio::chrono;
- #endif // defined(BOOST_ASIO_HAS_BOOST_DATE_TIME)
- void increment(int* count)
- {
- ++(*count);
- }
- void decrement_to_zero(io_context* ioc, int* count)
- {
- if (*count > 0)
- {
- --(*count);
- int before_value = *count;
- boost::asio::post(*ioc, bindns::bind(decrement_to_zero, ioc, count));
- // Handler execution cannot nest, so count value should remain unchanged.
- BOOST_ASIO_CHECK(*count == before_value);
- }
- }
- void nested_decrement_to_zero(io_context* ioc, int* count)
- {
- if (*count > 0)
- {
- --(*count);
- boost::asio::dispatch(*ioc,
- bindns::bind(nested_decrement_to_zero, ioc, count));
- // Handler execution is nested, so count value should now be zero.
- BOOST_ASIO_CHECK(*count == 0);
- }
- }
- void sleep_increment(io_context* ioc, int* count)
- {
- timer t(*ioc, chronons::seconds(2));
- t.wait();
- if (++(*count) < 3)
- boost::asio::post(*ioc, bindns::bind(sleep_increment, ioc, count));
- }
- void start_sleep_increments(io_context* ioc, int* count)
- {
- // Give all threads a chance to start.
- timer t(*ioc, chronons::seconds(2));
- t.wait();
- // Start the first of three increments.
- boost::asio::post(*ioc, bindns::bind(sleep_increment, ioc, count));
- }
- void throw_exception()
- {
- throw 1;
- }
- void io_context_run(io_context* ioc)
- {
- ioc->run();
- }
- void io_context_test()
- {
- io_context ioc;
- int count = 0;
- boost::asio::post(ioc, bindns::bind(increment, &count));
- // No handlers can be called until run() is called.
- BOOST_ASIO_CHECK(!ioc.stopped());
- BOOST_ASIO_CHECK(count == 0);
- ioc.run();
- // The run() call will not return until all work has finished.
- BOOST_ASIO_CHECK(ioc.stopped());
- BOOST_ASIO_CHECK(count == 1);
- count = 0;
- ioc.restart();
- boost::asio::post(ioc, bindns::bind(increment, &count));
- boost::asio::post(ioc, bindns::bind(increment, &count));
- boost::asio::post(ioc, bindns::bind(increment, &count));
- boost::asio::post(ioc, bindns::bind(increment, &count));
- boost::asio::post(ioc, bindns::bind(increment, &count));
- // No handlers can be called until run() is called.
- BOOST_ASIO_CHECK(!ioc.stopped());
- BOOST_ASIO_CHECK(count == 0);
- ioc.run();
- // The run() call will not return until all work has finished.
- BOOST_ASIO_CHECK(ioc.stopped());
- BOOST_ASIO_CHECK(count == 5);
- count = 0;
- ioc.restart();
- executor_work_guard<io_context::executor_type> w = make_work_guard(ioc);
- boost::asio::post(ioc, bindns::bind(&io_context::stop, &ioc));
- BOOST_ASIO_CHECK(!ioc.stopped());
- ioc.run();
- // The only operation executed should have been to stop run().
- BOOST_ASIO_CHECK(ioc.stopped());
- BOOST_ASIO_CHECK(count == 0);
- ioc.restart();
- boost::asio::post(ioc, bindns::bind(increment, &count));
- w.reset();
- // No handlers can be called until run() is called.
- BOOST_ASIO_CHECK(!ioc.stopped());
- BOOST_ASIO_CHECK(count == 0);
- ioc.run();
- // The run() call will not return until all work has finished.
- BOOST_ASIO_CHECK(ioc.stopped());
- BOOST_ASIO_CHECK(count == 1);
- count = 10;
- ioc.restart();
- boost::asio::post(ioc, bindns::bind(decrement_to_zero, &ioc, &count));
- // No handlers can be called until run() is called.
- BOOST_ASIO_CHECK(!ioc.stopped());
- BOOST_ASIO_CHECK(count == 10);
- ioc.run();
- // The run() call will not return until all work has finished.
- BOOST_ASIO_CHECK(ioc.stopped());
- BOOST_ASIO_CHECK(count == 0);
- count = 10;
- ioc.restart();
- boost::asio::post(ioc, bindns::bind(nested_decrement_to_zero, &ioc, &count));
- // No handlers can be called until run() is called.
- BOOST_ASIO_CHECK(!ioc.stopped());
- BOOST_ASIO_CHECK(count == 10);
- ioc.run();
- // The run() call will not return until all work has finished.
- BOOST_ASIO_CHECK(ioc.stopped());
- BOOST_ASIO_CHECK(count == 0);
- count = 10;
- ioc.restart();
- boost::asio::dispatch(ioc,
- bindns::bind(nested_decrement_to_zero, &ioc, &count));
- // No handlers can be called until run() is called, even though nested
- // delivery was specifically allowed in the previous call.
- BOOST_ASIO_CHECK(!ioc.stopped());
- BOOST_ASIO_CHECK(count == 10);
- ioc.run();
- // The run() call will not return until all work has finished.
- BOOST_ASIO_CHECK(ioc.stopped());
- BOOST_ASIO_CHECK(count == 0);
- count = 0;
- int count2 = 0;
- ioc.restart();
- BOOST_ASIO_CHECK(!ioc.stopped());
- boost::asio::post(ioc, bindns::bind(start_sleep_increments, &ioc, &count));
- boost::asio::post(ioc, bindns::bind(start_sleep_increments, &ioc, &count2));
- boost::asio::detail::thread thread1(bindns::bind(io_context_run, &ioc));
- boost::asio::detail::thread thread2(bindns::bind(io_context_run, &ioc));
- thread1.join();
- thread2.join();
- // The run() calls will not return until all work has finished.
- BOOST_ASIO_CHECK(ioc.stopped());
- BOOST_ASIO_CHECK(count == 3);
- BOOST_ASIO_CHECK(count2 == 3);
- count = 10;
- io_context ioc2;
- boost::asio::dispatch(ioc, boost::asio::bind_executor(ioc2,
- bindns::bind(decrement_to_zero, &ioc2, &count)));
- ioc.restart();
- BOOST_ASIO_CHECK(!ioc.stopped());
- ioc.run();
- // No decrement_to_zero handlers can be called until run() is called on the
- // second io_context object.
- BOOST_ASIO_CHECK(ioc.stopped());
- BOOST_ASIO_CHECK(count == 10);
- ioc2.run();
- // The run() call will not return until all work has finished.
- BOOST_ASIO_CHECK(count == 0);
- count = 0;
- int exception_count = 0;
- ioc.restart();
- boost::asio::post(ioc, &throw_exception);
- boost::asio::post(ioc, bindns::bind(increment, &count));
- boost::asio::post(ioc, bindns::bind(increment, &count));
- boost::asio::post(ioc, &throw_exception);
- boost::asio::post(ioc, bindns::bind(increment, &count));
- // No handlers can be called until run() is called.
- BOOST_ASIO_CHECK(!ioc.stopped());
- BOOST_ASIO_CHECK(count == 0);
- BOOST_ASIO_CHECK(exception_count == 0);
- for (;;)
- {
- try
- {
- ioc.run();
- break;
- }
- catch (int)
- {
- ++exception_count;
- }
- }
- // The run() calls will not return until all work has finished.
- BOOST_ASIO_CHECK(ioc.stopped());
- BOOST_ASIO_CHECK(count == 3);
- BOOST_ASIO_CHECK(exception_count == 2);
- }
- class test_service : public boost::asio::io_context::service
- {
- public:
- static boost::asio::io_context::id id;
- test_service(boost::asio::io_context& s)
- : boost::asio::io_context::service(s) {}
- private:
- virtual void shutdown_service() {}
- };
- boost::asio::io_context::id test_service::id;
- void io_context_service_test()
- {
- boost::asio::io_context ioc1;
- boost::asio::io_context ioc2;
- boost::asio::io_context ioc3;
- // Implicit service registration.
- boost::asio::use_service<test_service>(ioc1);
- BOOST_ASIO_CHECK(boost::asio::has_service<test_service>(ioc1));
- test_service* svc1 = new test_service(ioc1);
- try
- {
- boost::asio::add_service(ioc1, svc1);
- BOOST_ASIO_ERROR("add_service did not throw");
- }
- catch (boost::asio::service_already_exists&)
- {
- }
- delete svc1;
- // Explicit service registration.
- test_service* svc2 = new test_service(ioc2);
- boost::asio::add_service(ioc2, svc2);
- BOOST_ASIO_CHECK(boost::asio::has_service<test_service>(ioc2));
- BOOST_ASIO_CHECK(&boost::asio::use_service<test_service>(ioc2) == svc2);
- test_service* svc3 = new test_service(ioc2);
- try
- {
- boost::asio::add_service(ioc2, svc3);
- BOOST_ASIO_ERROR("add_service did not throw");
- }
- catch (boost::asio::service_already_exists&)
- {
- }
- delete svc3;
- // Explicit registration with invalid owner.
- test_service* svc4 = new test_service(ioc2);
- try
- {
- boost::asio::add_service(ioc3, svc4);
- BOOST_ASIO_ERROR("add_service did not throw");
- }
- catch (boost::asio::invalid_service_owner&)
- {
- }
- delete svc4;
- BOOST_ASIO_CHECK(!boost::asio::has_service<test_service>(ioc3));
- }
- BOOST_ASIO_TEST_SUITE
- (
- "io_context",
- BOOST_ASIO_TEST_CASE(io_context_test)
- BOOST_ASIO_TEST_CASE(io_context_service_test)
- )
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