uclibc-ng/libpthread/linuxthreads/lockfile.c

/* lockfile - Handle locking and unlocking of stream.
   Copyright (C) 1996, 1998, 2000 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public License as
   published by the Free Software Foundation; either version 2.1 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If
   not, see <http://www.gnu.org/licenses/>.  */

#include <stdio.h>
#include <pthread.h>

extern __typeof(pthread_mutexattr_init) __pthread_mutexattr_init attribute_hidden;
extern __typeof(pthread_mutexattr_settype) __pthread_mutexattr_settype attribute_hidden;
extern __typeof(pthread_mutexattr_destroy) __pthread_mutexattr_destroy attribute_hidden;

/* Note: glibc puts flockfile, funlockfile, and ftrylockfile in both
 * libc and libpthread.  In uClibc, they are now in libc only.  */

void __fresetlockfiles (void);
void __fresetlockfiles (void)
{
  FILE *fp;
  pthread_mutexattr_t attr;

  __pthread_mutexattr_init(&attr);
  __pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE_NP);

  for (fp = _stdio_openlist; fp != NULL; fp = fp->__nextopen)
    __pthread_mutex_init(&fp->__lock, &attr);

  __pthread_mutexattr_destroy(&attr);
}