1 /* 2 * Derived from bionic/libc/include/sys/eventfd.h 3 * 4 * Copyright (C) 2008 The Android Open Source Project 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * * Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * * Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the 15 * distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 20 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 21 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 24 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 27 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 #ifndef _SYS_EVENTFD_PORTABLE_H 31 #define _SYS_EVENTFD_PORTABLE_H 32 33 #include <portability.h> 34 #include <sys/cdefs.h> 35 #include <fcntl_portable.h> 36 37 __BEGIN_DECLS 38 39 /* 40 * EFD_SEMAPHORE is defined in recent linux kernels; 41 * but isn't mentioned elsewhere. See linux 3.4 42 * include/linux/eventfd.h for example. 43 */ 44 #define EFD_SEMAPHORE (1 << 0) 45 46 #define EFD_SEMAPHORE_PORTABLE EFD_SEMAPHORE 47 #define EFD_CLOEXEC_PORTABLE O_CLOEXEC_PORTABLE 48 #define EFD_NONBLOCK_PORTABLE O_NONBLOCK_PORTABLE 49 50 /* type of event counter */ 51 typedef uint64_t eventfd_portable_t; 52 53 extern int WRAP(eventfd)(unsigned int initval, int flags); 54 55 #if 0 56 /* Compatibility with GLibc; libportable versions don't appear to be necessary */ 57 extern int eventfd_read(int fd, eventfd_t *counter); 58 extern int eventfd_write(int fd, const eventfd_t counter); 59 #endif 60 61 __END_DECLS 62 63 #endif /* _SYS_EVENTFD_H */ 64