| /* 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 Library General Public License as |
| published by the Free Software Foundation; either version 2 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 |
| Library General Public License for more details. |
| |
| You should have received a copy of the GNU Library General Public |
| License along with the GNU C Library; see the file COPYING.LIB. If not, |
| write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include <sys/lock.h> |
| #include <stdio.h> |
| #include <pthread.h> |
| #include "internals.h" |
| |
| #ifdef USE_IN_LIBIO |
| #include "../libio/libioP.h" |
| #endif |
| |
| #ifndef SHARED |
| /* We need a hook to force this file to be linked in when static |
| libpthread is used. */ |
| const int __pthread_provide_lockfile = 0; |
| #endif |
| |
| void |
| __flockfile (FILE *stream) |
| { |
| __lock_acquire_recursive (*(_LOCK_RECURSIVE_T *)&stream->_lock); |
| } |
| #undef _IO_flockfile |
| strong_alias (__flockfile, _IO_flockfile) |
| weak_alias (__flockfile, flockfile); |
| |
| |
| void |
| __funlockfile (FILE *stream) |
| { |
| __lock_release_recursive (*(_LOCK_RECURSIVE_T *)&stream->_lock); |
| } |
| #undef _IO_funlockfile |
| strong_alias (__funlockfile, _IO_funlockfile) |
| weak_alias (__funlockfile, funlockfile); |
| |
| |
| int |
| __ftrylockfile (FILE *stream) |
| { |
| return __lock_try_acquire_recursive (*(_LOCK_RECURSIVE_T *)&stream->_lock); |
| } |
| strong_alias (__ftrylockfile, _IO_ftrylockfile) |
| weak_alias (__ftrylockfile, ftrylockfile); |
| |
| void |
| __flockfilelist(void) |
| { |
| #ifdef USE_IN_LIBIO |
| _IO_list_lock(); |
| #endif |
| } |
| |
| void |
| __funlockfilelist(void) |
| { |
| #ifdef USE_IN_LIBIO |
| _IO_list_unlock(); |
| #endif |
| } |
| |
| void |
| __fresetlockfiles (void) |
| { |
| #ifdef USE_IN_LIBIO |
| _IO_ITER i; |
| |
| pthread_mutexattr_t attr; |
| |
| __pthread_mutexattr_init (&attr); |
| __pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE_NP); |
| |
| for (i = _IO_iter_begin(); i != _IO_iter_end(); i = _IO_iter_next(i)) |
| __pthread_mutex_init (_IO_iter_file(i)->_lock, &attr); |
| |
| __pthread_mutexattr_destroy (&attr); |
| |
| _IO_list_resetlock(); |
| #endif |
| } |