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6f7fa17e40
2000-09-01 Ulrich Drepper <drepper@redhat.com> * lockfile.c (__flockfile): If _IO_USER_LOCK bit is set don't do anything. (__funlockfile): Likewise. (__ftrylockfile): If _IO_USER_LOCK bit is set return always 0.
111 lines
2.5 KiB
C
111 lines
2.5 KiB
C
/* lockfile - Handle locking and unlocking of stream.
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Copyright (C) 1996, 1998, 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <bits/libc-lock.h>
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#include <stdio.h>
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#include <pthread.h>
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#ifdef USE_IN_LIBIO
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#include "../libio/libioP.h"
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#endif
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void
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__flockfile (FILE *stream)
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{
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#ifdef USE_IN_LIBIO
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if ((stream->_flags & _IO_USER_LOCK) == 0)
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__pthread_mutex_lock (stream->_lock);
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#else
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#endif
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}
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#ifdef USE_IN_LIBIO
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#undef _IO_flockfile
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strong_alias (__flockfile, _IO_flockfile)
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#endif
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weak_alias (__flockfile, flockfile);
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void
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__funlockfile (FILE *stream)
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{
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#ifdef USE_IN_LIBIO
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if ((stream->_flags & _IO_USER_LOCK) == 0)
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__pthread_mutex_unlock (stream->_lock);
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#else
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#endif
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}
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#ifdef USE_IN_LIBIO
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#undef _IO_funlockfile
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strong_alias (__funlockfile, _IO_funlockfile)
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#endif
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weak_alias (__funlockfile, funlockfile);
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int
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__ftrylockfile (FILE *stream)
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{
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#ifdef USE_IN_LIBIO
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if ((stream->_flags & _IO_USER_LOCK) == 0)
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return __pthread_mutex_trylock (stream->_lock);
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else
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return 0;
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#else
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#endif
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}
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#ifdef USE_IN_LIBIO
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strong_alias (__ftrylockfile, _IO_ftrylockfile)
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#endif
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weak_alias (__ftrylockfile, ftrylockfile);
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void
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__flockfilelist(void)
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{
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#ifdef USE_IN_LIBIO
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_IO_list_lock();
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#endif
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}
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void
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__funlockfilelist(void)
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{
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#ifdef USE_IN_LIBIO
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_IO_list_unlock();
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#endif
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}
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void
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__fresetlockfiles (void)
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{
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#ifdef USE_IN_LIBIO
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_IO_ITER i;
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pthread_mutexattr_t attr;
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__pthread_mutexattr_init (&attr);
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__pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE_NP);
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for (i = _IO_iter_begin(); i != _IO_iter_end(); i = _IO_iter_next(i))
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__pthread_mutex_init (_IO_iter_file(i)->_lock, &attr);
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__pthread_mutexattr_destroy (&attr);
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_IO_list_resetlock();
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#endif
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}
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