1  /* Copyright (C) 2003-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <assert.h>
      19  #include <errno.h>
      20  #include <futex-internal.h>
      21  #include <time.h>
      22  #include <sysdep.h>
      23  #include "pthreadP.h"
      24  
      25  
      26  int
      27  __pthread_condattr_setclock (pthread_condattr_t *attr, clockid_t clock_id)
      28  {
      29    /* Only a few clocks are allowed.  */
      30    if (clock_id != CLOCK_MONOTONIC && clock_id != CLOCK_REALTIME)
      31      /* If more clocks are allowed some day the storing of the clock ID
      32         in the pthread_cond_t structure needs to be adjusted.  */
      33      return EINVAL;
      34  
      35    /* Make sure the value fits in the bits we reserved.  */
      36    assert (clock_id < (1 << COND_CLOCK_BITS));
      37  
      38    int *valuep = &((struct pthread_condattr *) attr)->value;
      39  
      40    *valuep = ((*valuep & ~(((1 << COND_CLOCK_BITS) - 1) << 1))
      41  	     | (clock_id << 1));
      42  
      43    return 0;
      44  }
      45  versioned_symbol (libc, __pthread_condattr_setclock,
      46  		  pthread_condattr_setclock, GLIBC_2_34);
      47  
      48  #if OTHER_SHLIB_COMPAT (libpthread, GLIBC_2_3_3, GLIBC_2_34)
      49  compat_symbol (libpthread, __pthread_condattr_setclock,
      50  	       pthread_condattr_setclock, GLIBC_2_3_3);
      51  #endif