1 //===-- Implementation of the pthread_mutexattr_setpshared ----------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "pthread_mutexattr_setpshared.h" 10 #include "pthread_mutexattr.h" 11 12 #include "src/__support/common.h" 13 14 #include <errno.h> 15 #include <pthread.h> 16 17 namespace LIBC_NAMESPACE { 18 19 LLVM_LIBC_FUNCTION(int, pthread_mutexattr_setpshared, 20 (pthread_mutexattr_t *__restrict attr, int pshared)) { 21 if (pshared != PTHREAD_PROCESS_PRIVATE && pshared != PTHREAD_PROCESS_SHARED) 22 return EINVAL; 23 pthread_mutexattr_t old = *attr; 24 old &= ~unsigned(PThreadMutexAttrPos::PSHARED_MASK); 25 *attr = old | (pshared << unsigned(PThreadMutexAttrPos::PSHARED_SHIFT)); 26 return 0; 27 } 28 29 } // namespace LIBC_NAMESPACE 30