eventdispatcher.h

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*
* This file contains private API, this might break at any time between releases.
* You have been warned!
*
*/
#ifndef ZYPP_BASE_EVENTDISPATCHER_DEFINED
#define ZYPP_BASE_EVENTDISPATCHER_DEFINED

#include <zypp/zyppng/base/zyppglobal.h>
#include <zypp/zyppng/base/Signals>
#include <zypp/zyppng/base/Base>
#include <zypp/zyppng/base/AbstractEventSource>
#include <memory>
#include <functional>

namespace zyppng {

class SocketNotifier;
class Timer;
class EventDispatcher;


class EventDispatcherPrivate;

class LIBZYPP_NG_EXPORT EventDispatcher : public Base
{
  ZYPP_DECLARE_PRIVATE(EventDispatcher)
  friend class AbstractEventSource;
  friend class Timer;

public:

  using Ptr = std::shared_ptr<EventDispatcher>;
  using WeakPtr = std::shared_ptr<EventDispatcher>;
  using IdleFunction = std::function<bool ()>;

  static std::shared_ptr<EventDispatcher> createMain ( );

  static std::shared_ptr<EventDispatcher> createForThread ( );

  virtual ~EventDispatcher();

  virtual bool run_once();

  virtual void run ();

  virtual void quit ();

  template< typename T = IdleFunction >
  static void invokeOnIdle ( T &&callback )
  {
    auto ev = instance();
    if ( ev )
      ev->invokeOnIdleImpl( std::forward<T>(callback) );
  }

  template< typename T >
  static void unrefLater ( T &&ptr ) {
    auto ev = instance();
    if ( ev )
      ev->unrefLaterImpl( std::static_pointer_cast<void>( std::forward<T>(ptr) ) );
  }

  ulong runningTimers() const;

  static std::shared_ptr<EventDispatcher> instance();

protected:

  EventDispatcher( void *ctx = nullptr );

  void unrefLaterImpl ( std::shared_ptr<void> &&ptr );

  void invokeOnIdleImpl ( IdleFunction &&callback );

  virtual void updateEventSource ( AbstractEventSource *notifier, int fd, int mode );

  virtual void removeEventSource   ( AbstractEventSource *notifier, int fd = -1 );

  virtual void registerTimer ( Timer *timer );

  virtual void removeTimer ( Timer *timer );
};

}

#endif