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                <textarea name="file_content" style="width:100%; height:400px; font-family:monospace;">/* Copyright (C) 2002-2018 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   &lt;http://www.gnu.org/licenses/&gt;.  */

#ifndef	_SYS_EPOLL_H
#define	_SYS_EPOLL_H	1

#include &lt;stdint.h&gt;
#include &lt;sys/types.h&gt;

#include &lt;bits/types/sigset_t.h&gt;

/* Get the platform-dependent flags.  */
#include &lt;bits/epoll.h&gt;

#ifndef __EPOLL_PACKED
# define __EPOLL_PACKED
#endif


enum EPOLL_EVENTS
  {
    EPOLLIN = 0x001,
#define EPOLLIN EPOLLIN
    EPOLLPRI = 0x002,
#define EPOLLPRI EPOLLPRI
    EPOLLOUT = 0x004,
#define EPOLLOUT EPOLLOUT
    EPOLLRDNORM = 0x040,
#define EPOLLRDNORM EPOLLRDNORM
    EPOLLRDBAND = 0x080,
#define EPOLLRDBAND EPOLLRDBAND
    EPOLLWRNORM = 0x100,
#define EPOLLWRNORM EPOLLWRNORM
    EPOLLWRBAND = 0x200,
#define EPOLLWRBAND EPOLLWRBAND
    EPOLLMSG = 0x400,
#define EPOLLMSG EPOLLMSG
    EPOLLERR = 0x008,
#define EPOLLERR EPOLLERR
    EPOLLHUP = 0x010,
#define EPOLLHUP EPOLLHUP
    EPOLLRDHUP = 0x2000,
#define EPOLLRDHUP EPOLLRDHUP
    EPOLLEXCLUSIVE = 1u &lt;&lt; 28,
#define EPOLLEXCLUSIVE EPOLLEXCLUSIVE
    EPOLLWAKEUP = 1u &lt;&lt; 29,
#define EPOLLWAKEUP EPOLLWAKEUP
    EPOLLONESHOT = 1u &lt;&lt; 30,
#define EPOLLONESHOT EPOLLONESHOT
    EPOLLET = 1u &lt;&lt; 31
#define EPOLLET EPOLLET
  };


/* Valid opcodes ( &quot;op&quot; parameter ) to issue to epoll_ctl().  */
#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.  */


typedef union epoll_data
{
  void *ptr;
  int fd;
  uint32_t u32;
  uint64_t u64;
} epoll_data_t;

struct epoll_event
{
  uint32_t events;	/* Epoll events */
  epoll_data_t data;	/* User data variable */
} __EPOLL_PACKED;


__BEGIN_DECLS

/* Creates an epoll instance.  Returns an fd for the new instance.
   The &quot;size&quot; parameter is a hint specifying the number of file
   descriptors to be associated with the new instance.  The fd
   returned by epoll_create() should be closed with close().  */
extern int epoll_create (int __size) __THROW;

/* Same as epoll_create but with an FLAGS parameter.  The unused SIZE
   parameter has been dropped.  */
extern int epoll_create1 (int __flags) __THROW;


/* Manipulate an epoll instance &quot;epfd&quot;. Returns 0 in case of success,
   -1 in case of error ( the &quot;errno&quot; variable will contain the
   specific error code ) The &quot;op&quot; parameter is one of the EPOLL_CTL_*
   constants defined above. The &quot;fd&quot; parameter is the target of the
   operation. The &quot;event&quot; parameter describes which events the caller
   is interested in and any associated user data.  */
extern int epoll_ctl (int __epfd, int __op, int __fd,
		      struct epoll_event *__event) __THROW;


/* Wait for events on an epoll instance &quot;epfd&quot;. Returns the number of
   triggered events returned in &quot;events&quot; buffer. Or -1 in case of
   error with the &quot;errno&quot; variable set to the specific error code. The
   &quot;events&quot; parameter is a buffer that will contain triggered
   events. The &quot;maxevents&quot; is the maximum number of events to be
   returned ( usually size of &quot;events&quot; ). The &quot;timeout&quot; parameter
   specifies the maximum wait time in milliseconds (-1 == infinite).

   This function is a cancellation point and therefore not marked with
   __THROW.  */
extern int epoll_wait (int __epfd, struct epoll_event *__events,
		       int __maxevents, int __timeout);


/* Same as epoll_wait, but the thread&#039;s signal mask is temporarily
   and atomically replaced with the one provided as parameter.

   This function is a cancellation point and therefore not marked with
   __THROW.  */
extern int epoll_pwait (int __epfd, struct epoll_event *__events,
			int __maxevents, int __timeout,
			const __sigset_t *__ss);

__END_DECLS

#endif /* sys/epoll.h */
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