1 // Low-level functions for atomic operations: sh version -*- C++ -*-
3 // Copyright (C) 1999, 2001, 2002, 2003, 2004, 2005, 2006, 2009
4 // Free Software Foundation, Inc.
6 // This file is part of the GNU ISO C++ Library. This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 3, or (at your option)
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
17 // Under Section 7 of GPL version 3, you are granted additional
18 // permissions described in the GCC Runtime Library Exception, version
19 // 3.1, as published by the Free Software Foundation.
21 // You should have received a copy of the GNU General Public License and
22 // a copy of the GCC Runtime Library Exception along with this program;
23 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 // <http://www.gnu.org/licenses/>.
28 #include <ext/atomicity.h>
30 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
32 typedef int _Atomic_word;
35 __attribute__ ((__unused__))
36 __exchange_and_add (volatile _Atomic_word* __mem, int __val) throw ()
38 _Atomic_word __result;
47 : "+m" (*__mem), "=&r" (__result)
48 : "r" (__mem), "rI08" (__val)
56 __attribute__ ((__unused__))
57 __atomic_add (volatile _Atomic_word* __mem, int __val) throw ()
65 : "r" (__mem), "rI08" (__val)
69 _GLIBCXX_END_NAMESPACE
73 /* This is generic/atomicity.h */
75 #include <ext/atomicity.h>
76 #include <ext/concurrence.h>
80 __gnu_cxx::__mutex atomic_mutex;
81 } // anonymous namespace
83 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
86 __attribute__ ((__unused__))
87 __exchange_and_add(volatile _Atomic_word* __mem, int __val) throw ()
89 __gnu_cxx::__scoped_lock sentry(atomic_mutex);
90 _Atomic_word __result;
97 __attribute__ ((__unused__))
98 __atomic_add(volatile _Atomic_word* __mem, int __val) throw ()
99 { __exchange_and_add(__mem, __val); }
101 _GLIBCXX_END_NAMESPACE
103 #endif /* !__SH4A__ */