1  /* pthread_barrier_init.  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 <string.h>
      21  #include <assert.h>
      22  
      23  #include <pt-internal.h>
      24  
      25  int
      26  pthread_barrier_init (pthread_barrier_t *barrier,
      27  		      const pthread_barrierattr_t *attr, unsigned count)
      28  {
      29    ASSERT_TYPE_SIZE (pthread_barrier_t, __SIZEOF_PTHREAD_BARRIER_T);
      30  
      31    if (count == 0)
      32      return EINVAL;
      33  
      34    memset (barrier, 0, sizeof *barrier);
      35  
      36    barrier->__lock = PTHREAD_SPINLOCK_INITIALIZER;
      37    barrier->__pending = count;
      38    barrier->__count = count;
      39  
      40    if (attr == NULL
      41        || memcmp (attr, &__pthread_default_barrierattr, sizeof (*attr)) == 0)
      42      /* Use the default attributes.  */
      43      return 0;
      44  
      45    /* Non-default attributes.  */
      46  
      47    barrier->__attr = malloc (sizeof *attr);
      48    if (barrier->__attr == NULL)
      49      return ENOMEM;
      50  
      51    *barrier->__attr = *attr;
      52    return 0;
      53  }