/* Copyright (C) 2007, 2008, 2009 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifndef _SYS_EVENTFD_H
#define _SYS_EVENTFD_H 1
#include <stdint.h>
/* Type for event counter. */
typedef uint64_t eventfd_t;
/* Flags for signalfd. */
enum
{
EFD_SEMAPHORE = 1,
#define EFD_SEMAPHORE EFD_SEMAPHORE
EFD_CLOEXEC = 02000000,
#define EFD_CLOEXEC EFD_CLOEXEC
EFD_NONBLOCK = 04000
#define EFD_NONBLOCK EFD_NONBLOCK
};
__BEGIN_DECLS
/* Return file descriptor for generic event channel. Set initial
value to COUNT. */
extern int eventfd (int __count, int __flags) __THROW;
/* Read event counter and possibly wait for events. */
extern int eventfd_read (int __fd, eventfd_t *__value);
/* Increment event counter. */
extern int eventfd_write (int __fd, eventfd_t __value);
__END_DECLS
#endif /* sys/eventfd.h */
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