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1 /* Threads compatibility routines for libgcc2. */
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2 /* Compile this one with gcc. */
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3 /* Copyright (C) 2003, 2004, 2009 Free Software Foundation, Inc.
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify it under
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8 the terms of the GNU General Public License as published by the Free
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9 Software Foundation; either version 3, or (at your option) any later
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10 version.
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11
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12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 Under Section 7 of GPL version 3, you are granted additional
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18 permissions described in the GCC Runtime Library Exception, version
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19 3.1, as published by the Free Software Foundation.
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20
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21 You should have received a copy of the GNU General Public License and
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22 a copy of the GCC Runtime Library Exception along with this program;
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23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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24 <http://www.gnu.org/licenses/>. */
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25
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26 #include "gthr-gnat.h"
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27
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28 #ifndef HIDE_EXPORTS
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29 #pragma GCC visibility push(default)
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30 #endif
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31
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32 #ifdef __cplusplus
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33 #define UNUSED(x)
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34 #else
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35 #define UNUSED(x) x __attribute__((unused))
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36 #endif
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37
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38 void __gnat_default_lock (void);
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39 void __gnat_default_unlock (void);
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40
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41 void
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42 __gnat_default_lock (void)
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43 {
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44 return;
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45 }
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46
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47 void
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48 __gnat_default_unlock (void)
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49 {
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50 return;
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51 }
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52
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53 static void (*__gnat_task_lock) (void) = *__gnat_default_lock;
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54 static void (*__gnat_task_unlock) (void) = *__gnat_default_unlock;
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55
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56 void
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57 __gnat_install_locks (void (*lock) (void), void (*unlock) (void))
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58 {
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59 __gnat_task_lock = lock;
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60 __gnat_task_unlock = unlock;
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61 }
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62
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63 int
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64 __gthread_active_p (void)
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65 {
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66 return 0;
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67 }
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68
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69 int
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70 __gthread_mutex_lock (__gthread_mutex_t * UNUSED (mutex))
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71 {
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72 __gnat_task_lock ();
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73 return 0;
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74 }
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75
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76 int
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77 __gthread_mutex_unlock (__gthread_mutex_t * UNUSED (mutex))
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78 {
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79 __gnat_task_unlock ();
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80 return 0;
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81 }
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82
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83 #ifndef HIDE_EXPORTS
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84 #pragma GCC visibility pop
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85 #endif
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