ApplicationFactory.cpp

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#include <application/ApplicationFactory.hpp>

namespace mic {
namespace application {

// Init application instance - as NULL.
boost::atomic<ApplicationFactory*> ApplicationFactory::instance_(NULL);

// Initilize mutex.
boost::mutex ApplicationFactory::instantiation_mutex;



ApplicationFactory* ApplicationFactory::getInstance() {
    // Try to load the instance - first check.
    ApplicationFactory* tmp = instance_.load(boost::memory_order_consume);
    // If instance does not exist.
    if (!tmp) {
        // Enter critical section.
        boost::mutex::scoped_lock guard(instantiation_mutex);
        // Try to load the instance - second check.
        tmp = instance_.load(boost::memory_order_consume);
        // If still does not exist - create new instance.
        if (!tmp) {
            tmp = new ApplicationFactory;
            instance_.store(tmp, boost::memory_order_release);
        }//: if
        // Exit critical section.
    }//: if
    // Return instance.
    return tmp;
}


ApplicationFactory::ApplicationFactory() {
    // NULL pointer - important!
    internal_factory = nullptr;
}

ApplicationFactory::~ApplicationFactory() {
    // TODO Auto-generated destructor stub
}

} /* namespace application */
} /* namespace mic */