BPoll.h

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/*******************************************************************************
 *  BPoll.h     File poll class
 *  T.Barnaby,  BEAM Ltd,   01/4/05
 *  Copyright (c) 2022 All Right Reserved, Beam Ltd, https://www.beam.ltd.uk
 *  For license see LICENSE.txt at the root of the beamlib source tree.
 *******************************************************************************
 */
#ifndef BPOLL_H
#define BPOLL_H 1
 
#include <BList.h>
#include <BError.h>
 
#if TARGET_win32 || TARGET_win64
//#undef _WIN32_WINNT
//#define _WIN32_WINNT  WindowsVista
#include <winsock2.h>
 
#ifdef ZAP
#define POLLRDNORM 0x0100
#define POLLRDBAND 0x0200
#define POLLIN    (POLLRDNORM | POLLRDBAND)
#define POLLPRI    0x0400
 
#define POLLWRNORM 0x0010
#define POLLOUT   (POLLWRNORM)
#define POLLWRBAND 0x0020
 
#define POLLERR    0x0001
#define POLLHUP    0x0002
#define POLLNVAL   0x0004
 
struct pollfd {
    int     fd;     /* File descriptor to poll.  */
    short int   events;     /* Types of events poller cares about.  */
    short int   revents;    /* Types of events that actually occurred.  */
};
#endif
 
#define NFDBITS     (8 * sizeof(int))
 
#else
#include <sys/poll.h>
#endif
 
class BPoll {
public:
    typedef struct pollfd PollFd;
 
            BPoll();
            ~BPoll();
            
    void        append(int fd, int events = POLLIN|POLLERR|POLLHUP|POLLNVAL);   
    void        delFd(int fd);                          
 
    BError      doPoll(int& fd, int timeoutUs = -1);                
    BError      doPollEvents(int& fd, int& events, int timeoutUs = -1);     
 
    int     getPollFdsNum();
    PollFd*     getPollFds();
    void        clear();
private:
    int     nextFd(int i);
    
    int     ofdsNum;            
    PollFd*     ofds;               
    int     ofdsNext;           
};
 
#endif