sysdeps/mach/hurd/cthreads.c

   1 /* Copyright (C) 1997-2018 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    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <libc-lock.h>
  19 #include <errno.h>
  20 #include <stdlib.h>
  21
  22 /* Placeholder for key creation routine from Hurd cthreads library.  */
  23 int
  24 weak_function
  25 cthread_keycreate (cthread_key_t *key)
  26 {
  27   __set_errno (ENOSYS);
  28  *key = -1;
  29   return -1;
  30 }
  31
  32 /* Placeholder for key retrieval routine from Hurd cthreads library.  */
  33 int
  34 weak_function
  35 cthread_getspecific (cthread_key_t key, void **pval)
  36 {
  37   *pval = NULL;
  38   __set_errno (ENOSYS);
  39   return -1;
  40 }
  41
  42 /* Placeholder for key setting routine from Hurd cthreads library.  */
  43 int
  44 weak_function
  45 cthread_setspecific (cthread_key_t key, void *val)
  46 {
  47   __set_errno (ENOSYS);
  48   return -1;
  49 }
  50
  51 /* Call cthread_getspecific which gets a pointer to the return value instead
  52    of just returning it.  */
  53 void *
  54 __libc_getspecific (cthread_key_t key)
  55 {
  56   void *val;
  57   cthread_getspecific (key, &val);
  58   return val;
  59 }