1 | /* lockfile - Handle locking and unlocking of stream. |
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2 | Copyright (C) 1996, 1998, 2000 Free Software Foundation, Inc. |
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3 | This file is part of the GNU C Library. |
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4 | |
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5 | The GNU C Library is free software; you can redistribute it and/or |
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6 | modify it under the terms of the GNU Library General Public License as |
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7 | published by the Free Software Foundation; either version 2 of the |
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8 | License, or (at your option) any later version. |
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9 | |
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10 | The GNU C Library is distributed in the hope that it will be useful, |
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11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 | Library General Public License for more details. |
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14 | |
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15 | You should have received a copy of the GNU Library General Public |
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16 | License along with the GNU C Library; see the file COPYING.LIB. If not, |
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17 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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18 | Boston, MA 02111-1307, USA. */ |
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19 | |
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20 | #include <sys/lock.h> |
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21 | #include <stdio.h> |
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22 | #include <pthread.h> |
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23 | #include "internals.h" |
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24 | |
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25 | #ifdef USE_IN_LIBIO |
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26 | #include "../libio/libioP.h" |
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27 | #endif |
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28 | |
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29 | #ifndef SHARED |
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30 | /* We need a hook to force this file to be linked in when static |
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31 | libpthread is used. */ |
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32 | const int __pthread_provide_lockfile = 0; |
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33 | #endif |
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34 | |
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35 | void |
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36 | __flockfile (FILE *stream) |
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37 | { |
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38 | __lock_acquire_recursive (*(_LOCK_RECURSIVE_T *)&stream->_lock); |
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39 | } |
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40 | #undef _IO_flockfile |
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41 | strong_alias (__flockfile, _IO_flockfile) |
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42 | weak_alias (__flockfile, flockfile); |
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43 | |
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44 | |
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45 | void |
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46 | __funlockfile (FILE *stream) |
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47 | { |
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48 | __lock_release_recursive (*(_LOCK_RECURSIVE_T *)&stream->_lock); |
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49 | } |
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50 | #undef _IO_funlockfile |
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51 | strong_alias (__funlockfile, _IO_funlockfile) |
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52 | weak_alias (__funlockfile, funlockfile); |
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53 | |
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54 | |
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55 | int |
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56 | __ftrylockfile (FILE *stream) |
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57 | { |
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58 | return __lock_try_acquire_recursive (*(_LOCK_RECURSIVE_T *)&stream->_lock); |
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59 | } |
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60 | strong_alias (__ftrylockfile, _IO_ftrylockfile) |
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61 | weak_alias (__ftrylockfile, ftrylockfile); |
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62 | |
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63 | void |
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64 | __flockfilelist(void) |
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65 | { |
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66 | #ifdef USE_IN_LIBIO |
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67 | _IO_list_lock(); |
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68 | #endif |
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69 | } |
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70 | |
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71 | void |
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72 | __funlockfilelist(void) |
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73 | { |
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74 | #ifdef USE_IN_LIBIO |
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75 | _IO_list_unlock(); |
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76 | #endif |
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77 | } |
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78 | |
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79 | void |
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80 | __fresetlockfiles (void) |
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81 | { |
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82 | #ifdef USE_IN_LIBIO |
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83 | _IO_ITER i; |
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84 | |
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85 | pthread_mutexattr_t attr; |
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86 | |
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87 | __pthread_mutexattr_init (&attr); |
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88 | __pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE_NP); |
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89 | |
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90 | for (i = _IO_iter_begin(); i != _IO_iter_end(); i = _IO_iter_next(i)) |
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91 | __pthread_mutex_init (_IO_iter_file(i)->_lock, &attr); |
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92 | |
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93 | __pthread_mutexattr_destroy (&attr); |
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94 | |
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95 | _IO_list_resetlock(); |
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96 | #endif |
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97 | } |
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