text: /****************************************************************************
   * fs/vfs/fs_epoll.c
   *
   *   Copyright (C) 2015 Anton D. Kachalov. All rights reserved.
   *   Author: Anton D. Kachalov <mouse@mayc.ru>
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   * 3. Neither the name NuttX nor the names of its contributors may be
   *    used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
   * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
   * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   ****************************************************************************/
  
  #ifndef __INCLUDE_SYS_EPOLL_H
  #define __INCLUDE_SYS_EPOLL_H
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  #include <poll.h>
  
  /****************************************************************************
   * Pre-processor Definitions
   ****************************************************************************/
  
  #define EPOLL_CTL_ADD 1 /* Add a file descriptor to the interface.  */
  #define EPOLL_CTL_DEL 2 /* Remove a file descriptor from the interface.  */
  #define EPOLL_CTL_MOD 3 /* Change file descriptor epoll_event structure.  */
  
  /****************************************************************************
   * Public Types
   ****************************************************************************/
  
  enum EPOLL_EVENTS
    {
      EPOLLIN = POLLIN,
  #define EPOLLIN EPOLLIN
      EPOLLPRI = POLLPRI,
  #define EPOLLPRI EPOLLPRI
      EPOLLOUT = POLLOUT,
  #define EPOLLOUT EPOLLOUT
      EPOLLRDNORM = POLLRDNORM,
  #define EPOLLRDNORM EPOLLRDNORM
      EPOLLRDBAND = POLLRDBAND,
  #define EPOLLRDBAND EPOLLRDBAND
      EPOLLWRNORM = POLLWRNORM,
  #define EPOLLWRNORM EPOLLWRNORM
      EPOLLWRBAND = POLLWRBAND,
  #define EPOLLWRBAND EPOLLWRBAND
      EPOLLERR = POLLERR,
  #define EPOLLERR EPOLLERR
      EPOLLHUP = POLLHUP,
  #define EPOLLHUP EPOLLHUP
      EPOLLRDHUP = 0x2000,
  #define EPOLLRDHUP EPOLLRDHUP
      EPOLLWAKEUP = 1u << 29,
  #define EPOLLWAKEUP EPOLLWAKEUP
      EPOLLONESHOT = 1u << 30,
  #define EPOLLONESHOT EPOLLONESHOT
    };
  
  /* Flags to be passed to epoll_create1.  */
  
  enum
  {
    EPOLL_CLOEXEC = 02000000
  #define EPOLL_CLOEXEC EPOLL_CLOEXEC
  };
  
  typedef union poll_data
  {
    FAR void    *ptr;
    int          fd;
    uint32_t     u32;
  } epoll_data_t;
  
  struct epoll_event
  {
    uint32_t     events;
    epoll_data_t data;
  };
  
  /****************************************************************************
   * Public Data
   ****************************************************************************/
  
  #undef EXTERN
  #if defined(__cplusplus)
  #define EXTERN extern "C"
  extern "C"
  {
  #else
  #define EXTERN extern
  #endif
  
  /****************************************************************************
   * Public Function Prototypes
   ****************************************************************************/
  
  int epoll_create(int size);
  int epoll_create1(int flags);
  int epoll_ctl(int epfd, int op, int fd, FAR struct epoll_event *ev);
  int epoll_wait(int epfd, FAR struct epoll_event *evs,
                 int maxevents, int timeout);
  int epoll_pwait(int epfd, FAR struct epoll_event *evs,
                  int maxevents, int timeout, FAR const sigset_t *sigmask);
  
  void epoll_close(int epfd);
  
  #undef EXTERN
  #if defined(__cplusplus)
  }
  #endif
  
  #endif /* __INCLUDE_SYS_EPOLL_H */
  