[444] | 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 Library General Public License as |
---|
| 7 | published by the Free Software Foundation; either version 2 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 | Library General Public License for more details. |
---|
| 14 | |
---|
| 15 | You should have received a copy of the GNU Library General Public |
---|
| 16 | License along with the GNU C Library; see the file COPYING.LIB. If not, |
---|
| 17 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
---|
| 18 | Boston, MA 02111-1307, USA. */ |
---|
| 19 | |
---|
| 20 | #include <sys/lock.h> |
---|
| 21 | #include <stdio.h> |
---|
| 22 | #include <pthread.h> |
---|
| 23 | #include "internals.h" |
---|
| 24 | |
---|
| 25 | #ifdef USE_IN_LIBIO |
---|
| 26 | #include "../libio/libioP.h" |
---|
| 27 | #endif |
---|
| 28 | |
---|
| 29 | #ifndef SHARED |
---|
| 30 | /* We need a hook to force this file to be linked in when static |
---|
| 31 | libpthread is used. */ |
---|
| 32 | const int __pthread_provide_lockfile = 0; |
---|
| 33 | #endif |
---|
| 34 | |
---|
| 35 | void |
---|
| 36 | __flockfile (FILE *stream) |
---|
| 37 | { |
---|
| 38 | __lock_acquire_recursive (*(_LOCK_RECURSIVE_T *)&stream->_lock); |
---|
| 39 | } |
---|
| 40 | #undef _IO_flockfile |
---|
| 41 | strong_alias (__flockfile, _IO_flockfile) |
---|
| 42 | weak_alias (__flockfile, flockfile); |
---|
| 43 | |
---|
| 44 | |
---|
| 45 | void |
---|
| 46 | __funlockfile (FILE *stream) |
---|
| 47 | { |
---|
| 48 | __lock_release_recursive (*(_LOCK_RECURSIVE_T *)&stream->_lock); |
---|
| 49 | } |
---|
| 50 | #undef _IO_funlockfile |
---|
| 51 | strong_alias (__funlockfile, _IO_funlockfile) |
---|
| 52 | weak_alias (__funlockfile, funlockfile); |
---|
| 53 | |
---|
| 54 | |
---|
| 55 | int |
---|
| 56 | __ftrylockfile (FILE *stream) |
---|
| 57 | { |
---|
| 58 | return __lock_try_acquire_recursive (*(_LOCK_RECURSIVE_T *)&stream->_lock); |
---|
| 59 | } |
---|
| 60 | strong_alias (__ftrylockfile, _IO_ftrylockfile) |
---|
| 61 | weak_alias (__ftrylockfile, ftrylockfile); |
---|
| 62 | |
---|
| 63 | void |
---|
| 64 | __flockfilelist(void) |
---|
| 65 | { |
---|
| 66 | #ifdef USE_IN_LIBIO |
---|
| 67 | _IO_list_lock(); |
---|
| 68 | #endif |
---|
| 69 | } |
---|
| 70 | |
---|
| 71 | void |
---|
| 72 | __funlockfilelist(void) |
---|
| 73 | { |
---|
| 74 | #ifdef USE_IN_LIBIO |
---|
| 75 | _IO_list_unlock(); |
---|
| 76 | #endif |
---|
| 77 | } |
---|
| 78 | |
---|
| 79 | void |
---|
| 80 | __fresetlockfiles (void) |
---|
| 81 | { |
---|
| 82 | #ifdef USE_IN_LIBIO |
---|
| 83 | _IO_ITER i; |
---|
| 84 | |
---|
| 85 | pthread_mutexattr_t attr; |
---|
| 86 | |
---|
| 87 | __pthread_mutexattr_init (&attr); |
---|
| 88 | __pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE_NP); |
---|
| 89 | |
---|
| 90 | for (i = _IO_iter_begin(); i != _IO_iter_end(); i = _IO_iter_next(i)) |
---|
| 91 | __pthread_mutex_init (_IO_iter_file(i)->_lock, &attr); |
---|
| 92 | |
---|
| 93 | __pthread_mutexattr_destroy (&attr); |
---|
| 94 | |
---|
| 95 | _IO_list_resetlock(); |
---|
| 96 | #endif |
---|
| 97 | } |
---|