poll_set.h

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#ifndef ROSCPP_POLL_SET_H
#define ROSCPP_POLL_SET_H

#include <vector>
#include "io.h"
#include "common.h"
#include <boost/shared_ptr.hpp>
#include <boost/function.hpp>
#include <boost/thread/mutex.hpp>

namespace ros
{

class Transport;
typedef boost::shared_ptr<Transport> TransportPtr;

class ROSCPP_DECL PollSet
{
public:
  PollSet();
  ~PollSet();

  typedef boost::function<void(int)> SocketUpdateFunc;
  bool addSocket(int sock, const SocketUpdateFunc& update_func, const TransportPtr& transport = TransportPtr());
  bool delSocket(int sock);

  bool addEvents(int sock, int events);
  bool delEvents(int sock, int events);

  void update(int poll_timeout);

  void signal();

private:
  void createNativePollset();

  void onLocalPipeEvents(int events);

  struct SocketInfo
  {
    TransportPtr transport_;
    SocketUpdateFunc func_;
    int fd_;
    int events_;
  };
  typedef std::map<int, SocketInfo> M_SocketInfo;
  M_SocketInfo socket_info_;
  boost::mutex socket_info_mutex_;
  bool sockets_changed_;

  boost::mutex just_deleted_mutex_;
  typedef std::vector<int> V_int;
  V_int just_deleted_;

  std::vector<socket_pollfd> ufds_;

  boost::mutex signal_mutex_;
  signal_fd_t signal_pipe_[2];

  int epfd_;
};

}

#endif // ROSCPP_POLL_SET_H