xref: /aosp_15_r20/external/llvm-libc/src/pthread/pthread_attr_getstack.cpp (revision 71db0c75aadcf003ffe3238005f61d7618a3fead)
1  //===-- Implementation of the pthread_attr_getstack -----------------===//
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_attr_getstack.h"
10  #include "pthread_attr_getstacksize.h"
11  
12  #include "src/__support/common.h"
13  #include "src/__support/macros/config.h"
14  #include "src/__support/macros/optimization.h"
15  
16  #include <pthread.h>
17  
18  namespace LIBC_NAMESPACE_DECL {
19  
20  LLVM_LIBC_FUNCTION(int, pthread_attr_getstack,
21                     (const pthread_attr_t *__restrict attr,
22                      void **__restrict stack, size_t *__restrict stacksize)) {
23    // As of writing this `pthread_attr_getstacksize` can never fail.
24    int result = LIBC_NAMESPACE::pthread_attr_getstacksize(attr, stacksize);
25    if (LIBC_UNLIKELY(result != 0))
26      return result;
27    *stack = attr->__stack;
28    return 0;
29  }
30  
31  } // namespace LIBC_NAMESPACE_DECL
32