libpthread/linuxthreads.old/lockfile.c

   1 /* lockfile - Handle locking and unlocking of stream.
   2    Copyright (C) 1996, 1998, 2000 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 License as
   7    published by the Free Software Foundation; either version 2.1 of the
   8    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; see the file COPYING.LIB.  If
  17    not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #include <stdio.h>
  20 #include <pthread.h>
  21
  22 extern __typeof(pthread_mutexattr_init) __pthread_mutexattr_init attribute_hidden;
  23 extern __typeof(pthread_mutexattr_settype) __pthread_mutexattr_settype attribute_hidden;
  24 extern __typeof(pthread_mutexattr_destroy) __pthread_mutexattr_destroy attribute_hidden;
  25
  26 /* Note: glibc puts flockfile, funlockfile, and ftrylockfile in both
  27  * libc and libpthread.  In uClibc, they are now in libc only.  */
  28
  29 void __fresetlockfiles (void);
  30 void __fresetlockfiles (void)
  31 {
  32   FILE *fp;
  33   pthread_mutexattr_t attr;
  34
  35   __pthread_mutexattr_init(&attr);
  36   __pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE_NP);
  37
  38   for (fp = _stdio_openlist; fp != NULL; fp = fp->__nextopen)
  39     __pthread_mutex_init(&fp->__lock, &attr);
  40
  41   __pthread_mutexattr_destroy(&attr);
  42 }