1  /* Set the signal mask in a POSIX thread attribute.  Internal variant.
       2     Copyright (C) 2020-2023 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 <pthreadP.h>
      20  #include <internal-signals.h>
      21  
      22  int
      23  __pthread_attr_setsigmask_internal (pthread_attr_t *attr,
      24                                      const sigset_t *sigmask)
      25  {
      26    struct pthread_attr *iattr = (struct pthread_attr *) attr;
      27  
      28    if (sigmask == NULL)
      29      {
      30        /* Mark the signal mask as unset if it is present.  */
      31        if (iattr->extension != NULL)
      32          iattr->extension->sigmask_set = false;
      33        return 0;
      34      }
      35  
      36    int ret = __pthread_attr_extension (iattr);
      37    if (ret != 0)
      38      return ret;
      39  
      40    iattr->extension->sigmask = *sigmask;
      41    iattr->extension->sigmask_set = true;
      42  
      43    return 0;
      44  }
      45  libc_hidden_def (__pthread_attr_setsigmask_internal)