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 | #include "src/__support/libc_errno.h" |
14 | #include "src/__support/macros/config.h" |
15 | |
16 | #include <pthread.h> |
17 | |
18 | namespace LIBC_NAMESPACE_DECL { |
19 | |
20 | LLVM_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_DECL |
31 |