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// Copyright (C) 2011-2021 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>
namespace isc {
namespace asiolink {
namespace {
// A trivial wrapper for std::function. SunStudio doesn't seem to be capable
// of handling a std::function object if directly passed to
// io_service::post().
class CallbackWrapper {
public:
/// \brief Constructor
CallbackWrapper(const std::function<void()>& callback) :
callback_(callback) {}
/// \brief Function operator
void operator()() {
callback_();
}
private:
/// \brief The callback function
std::function<void()> callback_;
};
}
class IOServiceImpl {
private:
IOServiceImpl(const IOService& source);
IOServiceImpl& operator=(const IOService& source);
public:
/// \brief The constructor
IOServiceImpl() :
io_service_(),
work_(new boost::asio::io_service::work(io_service_)) {
};
/// \brief The destructor.
~IOServiceImpl() {};
//@}
/// \brief Start the underlying event loop.
///
/// This method does not return control to the caller until
/// the \c stop() method is called via some handler.
void run() {
io_service_.run();
};
/// \brief Run the underlying event loop for a single event.
///
/// This method return control to the caller as soon as the
/// first handler has completed. (If no handlers are ready when
/// it is run, it will block until one is.)
void run_one() {
io_service_.run_one();
};
/// \brief Run the underlying event loop for a ready events.
///
/// This method executes handlers for all ready events and returns.
/// It will return immediately if there are no ready events.
void poll() {
io_service_.poll();
};
/// \brief Stop the underlying event loop.
///
/// This will return the control to the caller of the \c run() method.
void stop() {
io_service_.stop();
}
/// \brief Indicates if the IOService has been stopped.
///
/// \return true if the IOService has been stopped, false otherwise.
bool stopped() const {
return (io_service_.stopped());
}
/// \brief Restarts the IOService in preparation for a subsequent \c run() invocation.
void restart() {
io_service_.reset();
}
/// \brief Removes IO service work object to let it finish running
/// when all handlers have been invoked.
void stopWork() {
work_.reset();
}
/// \brief Return the native \c io_service object used in this wrapper.
///
/// This is a short term work around to support other Kea modules
/// that share the same \c io_service with the authoritative server.
/// It will eventually be removed once the wrapper interface is
/// generalized.
boost::asio::io_service& get_io_service() {
return (io_service_);
}
/// \brief Post a callback on the IO service
///
/// \param callback The callback to be run on the IO service.
void post(const std::function<void ()>& callback) {
const CallbackWrapper wrapper(callback);
io_service_.post(wrapper);
}
private:
boost::asio::io_service io_service_;
boost::shared_ptr<boost::asio::io_service::work> work_;
};
IOService::IOService() : io_impl_(new IOServiceImpl()) {
}
IOService::~IOService() {
}
void
IOService::run() {
io_impl_->run();
}
void
IOService::run_one() {
io_impl_->run_one();
}
void
IOService::poll() {
io_impl_->poll();
}
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_service&
IOService::get_io_service() {
return (io_impl_->get_io_service());
}
void
IOService::post(const std::function<void ()>& callback) {
return (io_impl_->post(callback));
}
} // namespace asiolink
} // namespace isc
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