sysdeps/htl/pt-rwlock-rdlock.c

   1 /* Acquire a rwlock for reading.  Generic version.
   2    Copyright (C) 2002-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library;  if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <pthread.h>
  20 #include <pt-internal.h>
  21
  22 /* Implemented in pt-rwlock-timedrdlock.c.  */
  23 extern int __pthread_rwlock_timedrdlock_internal (struct __pthread_rwlock
  24                                                   *rwlock,
  25                                                   clockid_t clockid,
  26                                                   const struct timespec
  27                                                   *abstime);
  28
  29 /* Acquire RWLOCK for reading, block if we can't get it.  */
  30 int
  31 __pthread_rwlock_rdlock (struct __pthread_rwlock *rwlock)
  32 {
  33   return __pthread_rwlock_timedrdlock_internal (rwlock, -1, 0);
  34 }
  35 weak_alias (__pthread_rwlock_rdlock, pthread_rwlock_rdlock);