/usr/include/x86_64-linux-gnu/sys/eventfd.h is in libc6-dev 2.15-0ubuntu10.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 | /* 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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