gthr-gnat.c revision 132718 
1/* Threads compatibility routines for libgcc2.  */
2/* Compile this one with gcc.  */
3/* Copyright (C) 2003 Free Software Foundation, Inc.
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify it under
8the terms of the GNU General Public License as published by the Free
9Software Foundation; either version 2, or (at your option) any later
10version.
11
12GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13WARRANTY; without even the implied warranty of MERCHANTABILITY or
14FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15for more details.
16
17You should have received a copy of the GNU General Public License
18along with GCC; see the file COPYING.  If not, write to the Free
19Software Foundation, 59 Temple Place - Suite 330, Boston, MA
2002111-1307, USA.  */
21
22/* As a special exception, if you link this library with other files,
23   some of which are compiled with GCC, to produce an executable,
24   this library does not by itself cause the resulting executable
25   to be covered by the GNU General Public License.
26   This exception does not however invalidate any other reasons why
27   the executable file might be covered by the GNU General Public License.  */
28
29
30#include "gthr-gnat.h"
31
32#ifdef __cplusplus
33#define UNUSED(x)
34#else
35#define UNUSED(x) x __attribute__((unused))
36#endif
37
38void __gnat_default_lock (void);
39void __gnat_default_unlock (void);
40
41void
42__gnat_default_lock (void)
43{
44  return;
45}
46
47void
48__gnat_default_unlock (void)
49{
50  return;
51}
52
53static void (*__gnat_task_lock) (void) = *__gnat_default_lock;
54static void (*__gnat_task_unlock) (void) = *__gnat_default_unlock;
55
56 void
57__gnat_install_locks (void (*lock) (void), void (*unlock) (void))
58{
59  __gnat_task_lock = lock;
60  __gnat_task_unlock = unlock;
61}
62
63int
64__gthread_active_p (void)
65{
66  return 0;
67}
68
69int
70__gthread_mutex_lock (__gthread_mutex_t * UNUSED (mutex))
71{
72  __gnat_task_lock ();
73  return 0;
74}
75
76int
77__gthread_mutex_unlock (__gthread_mutex_t * UNUSED (mutex))
78{
79  __gnat_task_unlock ();
80  return 0;
81}
82