io_service.cc

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// Copyright (C) 2011-2025 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
#include <config.h>
 
#include <asiolink/asio_wrapper.h>
#include <asiolink/io_service.h>
 
#include <unistd.h>             // for some IPC/network system calls
#include <netinet/in.h>
#include <boost/shared_ptr.hpp>
#include <sys/socket.h>
 
#include <chrono>
 
using namespace std::chrono;
 
namespace isc {
namespace asiolink {
 
class IOServiceImpl {

private:
    IOServiceImpl(const IOService& source);
    IOServiceImpl& operator=(const IOService& source);
public:
    IOServiceImpl() :
        io_service_(),
        work_(boost::asio::make_work_guard(io_service_)) {
    };

    ~IOServiceImpl() = default;

    void run() {
        io_service_.run();
    };

    size_t runOne() {
        return (static_cast<size_t>(io_service_.run_one()));
    };

    size_t runOneFor(size_t wait_time_usecs, bool& timed_out) {
        size_t cnt = io_service_.run_one_for(microseconds(wait_time_usecs));
        timed_out = (!cnt && !io_service_.stopped());
        return (cnt);
    };

    size_t poll() {
        return (static_cast<size_t>(io_service_.poll()));
    };

    size_t pollOne() {
        return (static_cast<size_t>(io_service_.poll_one()));
    };

    void stop() {
        io_service_.stop();
    }

    bool stopped() const {
        return (io_service_.stopped());
    }

    void restart() {
        io_service_.restart();
    }

    void stopWork() {
        work_.reset();
    }

    boost::asio::io_context& getInternalIOService() {
        return (io_service_);
    }

    void post(const std::function<void ()>& callback) {
        boost::asio::post(io_service_, callback);
    }
 
private:
    boost::asio::io_context io_service_;
    boost::asio::executor_work_guard<boost::asio::io_context::executor_type> work_;
};
 
IOService::IOService() : io_impl_(new IOServiceImpl()) {
}
 
IOService::~IOService() {
}
 
void
IOService::run() {
    io_impl_->run();
}
 
size_t
IOService::runOne() {
    return (io_impl_->runOne());
}
 
size_t
IOService::runOneFor(size_t wait_time_usecs, bool& timed_out) {
    return (io_impl_->runOneFor(wait_time_usecs, timed_out));
};
 
size_t
IOService::poll() {
    return (io_impl_->poll());
}
 
size_t
IOService::pollOne() {
    return (io_impl_->pollOne());
}
 
void
IOService::stop() {
    io_impl_->stop();
}
 
bool
IOService::stopped() const {
    return (io_impl_->stopped());
}
 
void
IOService::restart() {
    io_impl_->restart();
}
 
void
IOService::stopWork() {
    io_impl_->stopWork();
}
 
boost::asio::io_context&
IOService::getInternalIOService() {
    return (io_impl_->getInternalIOService());
}
 
void
IOService::post(const std::function<void ()>& callback) {
    return (io_impl_->post(callback));
}
 
void
IOService::stopAndPoll(bool ignore_errors) {
    stop();
    restart();
    if (ignore_errors) {
        try {
            poll();
        } catch (...) {
            // Ignore all exceptions.
        }
    } else {
        poll();
    }
}
 
}  // namespace asiolink
}  // namespace isc