31 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9#include "pthread_mutexattr_setpshared.h"10#include "pthread_mutexattr.h"11 12#include "src/__support/common.h"13#include "src/__support/libc_errno.h"14#include "src/__support/macros/config.h"15 16#include <pthread.h>17 18namespace LIBC_NAMESPACE_DECL {19 20LLVM_LIBC_FUNCTION(int, pthread_mutexattr_setpshared,21 (pthread_mutexattr_t *__restrict attr, int pshared)) {22 if (pshared != PTHREAD_PROCESS_PRIVATE && pshared != PTHREAD_PROCESS_SHARED)23 return EINVAL;24 pthread_mutexattr_t old = *attr;25 old &= ~unsigned(PThreadMutexAttrPos::PSHARED_MASK);26 *attr = old | (pshared << unsigned(PThreadMutexAttrPos::PSHARED_SHIFT));27 return 0;28}29 30} // namespace LIBC_NAMESPACE_DECL31