libc/src/pthread/pthread_rwlockattr_setkind_np.cpp

   1 //===-- Implementation of the pthread_rwlockattr_setkind_np ---------------===//
   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_rwlockattr_setkind_np.h"
  10
  11 #include "src/__support/common.h"
  12 #include "src/__support/macros/config.h"
  13 #include "src/errno/libc_errno.h"
  14
  15 #include <pthread.h> // pthread_rwlockattr_t
  16
  17 namespace LIBC_NAMESPACE_DECL {
  18
  19 LLVM_LIBC_FUNCTION(int, pthread_rwlockattr_setkind_np,
  20                    (pthread_rwlockattr_t * attr, int pref)) {
  21
  22   if (pref != PTHREAD_RWLOCK_PREFER_READER_NP &&
  23       pref != PTHREAD_RWLOCK_PREFER_WRITER_NP &&
  24       pref != PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP)
  25     return EINVAL;
  26
  27   attr->pref = pref;
  28   return 0;
  29 }
  30
  31 } // namespace LIBC_NAMESPACE_DECL