libpthread/nptl/sysdeps/unix/sysv/linux/libc_pthread_init.c

   1 /* Copyright (C) 2002,2003,2005,2006,2007,2009 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <unistd.h>
  20 #include <list.h>
  21 #include <fork.h>
  22 #include <dl-sysdep.h>
  23 #include <tls.h>
  24 #include <string.h>
  25 #include <pthreadP.h>
  26 #include <bits/libc-lock.h>
  27 #include <sysdep.h>
  28 #include <ldsodefs.h>
  29
  30
  31 #ifdef TLS_MULTIPLE_THREADS_IN_TCB
  32 void
  33 #else
  34 extern int __libc_multiple_threads attribute_hidden;
  35
  36 int *
  37 #endif
  38 __libc_pthread_init (
  39      unsigned long int *ptr,
  40      void (*reclaim) (void))
  41 {
  42   /* Remember the pointer to the generation counter in libpthread.  */
  43   __fork_generation_pointer = ptr;
  44
  45   /* Called by a child after fork.  */
  46   __register_atfork (NULL, NULL, reclaim, NULL);
  47
  48 #ifndef TLS_MULTIPLE_THREADS_IN_TCB
  49   return &__libc_multiple_threads;
  50 #endif
  51 }