sysdeps/mach/hurd/cthreads.c

   1 /* Copyright (C) 1997-2019 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 <libc-lock.h>
  19 #include <errno.h>
  20 #include <stdlib.h>
  21 #include <cthreads.h>
  22
  23 /* This serves as stub "self" pointer for libc locks when TLS is not initialized
  24    yet.  */
  25 char __libc_lock_self0[0];
  26
  27 /* Placeholder for key creation routine from Hurd cthreads library.  */
  28 int
  29 weak_function
  30 __cthread_keycreate (cthread_key_t *key)
  31 {
  32   __set_errno (ENOSYS);
  33  *key = -1;
  34   return -1;
  35 }
  36
  37 /* Placeholder for key retrieval routine from Hurd cthreads library.  */
  38 int
  39 weak_function
  40 __cthread_getspecific (cthread_key_t key, void **pval)
  41 {
  42   *pval = NULL;
  43   __set_errno (ENOSYS);
  44   return -1;
  45 }
  46
  47 /* Placeholder for key setting routine from Hurd cthreads library.  */
  48 int
  49 weak_function
  50 __cthread_setspecific (cthread_key_t key, void *val)
  51 {
  52   __set_errno (ENOSYS);
  53   return -1;
  54 }