1  /* Acquire a rwlock for reading.  Generic version.
       2     Copyright (C) 2002-2023 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);