nptl/sem_init.c

   1 /* Copyright (C) 2002 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <errno.h>
  21 #include <semaphore.h>
  22 #include <lowlevellock.h>
  23 #include <shlib-compat.h>
  24 #include "semaphoreP.h"
  25
  26
  27 int
  28 __new_sem_init (sem, pshared, value)
  29      sem_t *sem;
  30      int pshared;
  31      unsigned int value;
  32 {
  33   /* Parameter sanity check.  */
  34   if (__builtin_expect (value > SEM_VALUE_MAX, 0))
  35     {
  36       __set_errno (EINVAL);
  37       return -1;
  38     }
  39
  40   /* Map to the internal type.  */
  41   struct sem *isem = (struct sem *) sem;
  42
  43   /* Use the value the user provided.  */
  44   isem->count = value;
  45
  46   /* We can completely ignore the PSHARED parameter since inter-process
  47      use needs no special preparation.  */
  48
  49   return 0;
  50 }
  51 versioned_symbol (libpthread, __new_sem_init, sem_init, GLIBC_2_1);
  52 #if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1)
  53 strong_alias (__new_sem_init, __old_sem_init)
  54 compat_symbol (libpthread, __old_sem_init, sem_init, GLIBC_2_0);
  55 #endif