/*******************************************************************************
* BPoll.h File poll class
* T.Barnaby, BEAM Ltd, 01/4/05
* Copyright (c) 2012 All Right Reserved, Beam Ltd, http://www.beam.ltd.uk
*******************************************************************************
*/
#ifndef BPOLL_H
#define BPOLL_H 1
#include <BList.h>
#include <BError.h>
#include <sys/poll.h>
/// \brief This class provides an interface for polling a number of file descriptors.
/// It uses round robin polling
class BPoll {
public:
typedef struct pollfd PollFd;
BPoll();
~BPoll();
void append(int fd, int events = POLLIN|POLLERR|POLLHUP|POLLNVAL); ///< Append a file descriptor to polling list
void delFd(int fd); ///< Remove a file descriptor from polling list
BError doPoll(int& fd, int timeoutUs = -1); ///< Perform polling operation
BError doPollEvents(int& fd, int& events, int timeoutUs = -1); ///< Perform polling operation and return events
int getPollFdsNum();
PollFd* getPollFds();
void clear();
private:
int nextFd(int i);
int ofdsNum; ///< The number of FD's in list
PollFd* ofds; ///< The list of poll fd's
int ofdsNext; ///< The next list entry for round robin polling
};
#endif