1 /* Copyright (C) 2007-2014 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library. If not, see
16 <http://www.gnu.org/licenses/>. */
18 #ifndef _SYS_EVENTFD_H
19 #define _SYS_EVENTFD_H 1
24 /* Type for event counter. */
25 typedef uint64_t eventfd_t
;
27 /* Flags for signalfd. */
31 #define EFD_SEMAPHORE EFD_SEMAPHORE
32 EFD_CLOEXEC
= 010000000,
33 #define EFD_CLOEXEC EFD_CLOEXEC
34 EFD_NONBLOCK
= 00200004 /* HPUX has separate NDELAY & NONBLOCK */
35 #define EFD_NONBLOCK EFD_NONBLOCK
41 /* Return file descriptor for generic event channel. Set initial
43 extern int eventfd (int __count
, int __flags
) __THROW
;
45 /* Read event counter and possibly wait for events. */
46 extern int eventfd_read (int __fd
, eventfd_t
*__value
);
48 /* Increment event counter. */
49 extern int eventfd_write (int __fd
, eventfd_t __value
);
53 #endif /* sys/eventfd.h */