1 /* futex operations for glibc-internal use. Stub version; do not include 2 this file directly. 3 Copyright (C) 2014-2022 Free Software Foundation, Inc. 4 This file is part of the GNU C Library. 5 6 The GNU C Library is free software; you can redistribute it and/or 7 modify it under the terms of the GNU Lesser General Public 8 License as published by the Free Software Foundation; either 9 version 2.1 of the License, or (at your option) any later version. 10 11 The GNU C Library is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 Lesser General Public License for more details. 15 16 You should have received a copy of the GNU Lesser General Public 17 License along with the GNU C Library; if not, see 18 <https://www.gnu.org/licenses/>. */ 19 20 #ifndef STUB_FUTEX_INTERNAL_H 21 #define STUB_FUTEX_INTERNAL_H 22 23 #include <pthread.h> 24 25 /* Returns EINVAL if PSHARED is neither PTHREAD_PROCESS_PRIVATE nor 26 PTHREAD_PROCESS_SHARED; otherwise, returns 0 if PSHARED is supported, and 27 ENOTSUP if not. */ 28 static __always_inline int futex_supports_pshared(int pshared)29futex_supports_pshared (int pshared) 30 { 31 if (__glibc_likely (pshared == PTHREAD_PROCESS_PRIVATE)) 32 return 0; 33 else if (pshared == PTHREAD_PROCESS_SHARED) 34 return 0; 35 else 36 return EINVAL; 37 } 38 39 #endif /* futex-internal.h */ 40