Event.cpp

#include "Event.h"
#include <sstream>

namespace FCam {

    // Gets the next pending event. Returns false if there are no
    // outstanding events. 
    bool getNextEvent(Event *e) {
    pthread_mutex_lock(&EventGenerator::_eventQueueMutex);
    if (!EventGenerator::_eventQueue.size()) {
        pthread_mutex_unlock(&EventGenerator::_eventQueueMutex);
        return false;
    }
    *e = EventGenerator::_eventQueue.front();
    EventGenerator::_eventQueue.pop();
    pthread_mutex_unlock(&EventGenerator::_eventQueueMutex);
    return true;
    }

    void EventGenerator::postEvent(Event e) {
    e.creator = this;
    pthread_mutex_lock(&_eventQueueMutex);
    _eventQueue.push(e);
    pthread_mutex_unlock(&_eventQueueMutex);
    }

    std::string Event::description() const {
    return creator->getEventString(*this);
    }

    std::string EventGenerator::getEventString(const Event &e) const {
    std::stringstream str;
    str << "Unknown event of type " << e.type;
    str << " with data " << e.iData;
    str << " generated by " << std::hex << ((unsigned)(e.creator));
    return str.str();
    }

    std::queue<Event> EventGenerator::_eventQueue;
    pthread_mutex_t EventGenerator::_eventQueueMutex = PTHREAD_MUTEX_INITIALIZER;
}

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