/* Copyright (C) 2007-2020 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 <https://www.gnu.org/licenses/>. */ #ifndef _SYS_EVENTFD_H #define _SYS_EVENTFD_H 1 #include <stdint.h> /* Get the platform-dependent flags. */ #include <bits/eventfd.h> /* Type for event counter. */ typedef uint64_t eventfd_t; __BEGIN_DECLS /* Return file descriptor for generic event channel. Set initial value to COUNT. */ extern int eventfd (unsigned 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 */