diff options
Diffstat (limited to 'gcc-4.4.3/libstdc++-v3/config/cpu/i386/atomicity.h')
-rw-r--r-- | gcc-4.4.3/libstdc++-v3/config/cpu/i386/atomicity.h | 70 |
1 files changed, 0 insertions, 70 deletions
diff --git a/gcc-4.4.3/libstdc++-v3/config/cpu/i386/atomicity.h b/gcc-4.4.3/libstdc++-v3/config/cpu/i386/atomicity.h deleted file mode 100644 index de2b329e8..000000000 --- a/gcc-4.4.3/libstdc++-v3/config/cpu/i386/atomicity.h +++ /dev/null @@ -1,70 +0,0 @@ -// Low-level functions for atomic operations: x86, x >= 3 version -*- C++ -*- - -// Copyright (C) 2003, 2004, 2005, 2009 Free Software Foundation, Inc. -// -// This file is part of the GNU ISO C++ Library. This library is free -// software; you can redistribute it and/or modify it under the -// terms of the GNU General Public License as published by the -// Free Software Foundation; either version 3, or (at your option) -// any later version. - -// This library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU General Public License for more details. - -// Under Section 7 of GPL version 3, you are granted additional -// permissions described in the GCC Runtime Library Exception, version -// 3.1, as published by the Free Software Foundation. - -// You should have received a copy of the GNU General Public License and -// a copy of the GCC Runtime Library Exception along with this program; -// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -// <http://www.gnu.org/licenses/>. - -#include <ext/atomicity.h> - -_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx) - - template<int __inst> - struct _Atomicity_lock - { - static volatile _Atomic_word _S_atomicity_lock; - }; - - template<int __inst> - volatile _Atomic_word _Atomicity_lock<__inst>::_S_atomicity_lock = 0; - - template volatile _Atomic_word _Atomicity_lock<0>::_S_atomicity_lock; - - _Atomic_word - __attribute__ ((__unused__)) - __exchange_and_add(volatile _Atomic_word* __mem, int __val) - { - register _Atomic_word __result, __tmp = 1; - - // Obtain the atomic exchange/add spin lock. - do - { - __asm__ __volatile__ ("xchg{l} {%0,%1|%1,%0}" - : "=m" (_Atomicity_lock<0>::_S_atomicity_lock), - "+r" (__tmp) - : "m" (_Atomicity_lock<0>::_S_atomicity_lock)); - } - while (__tmp); - - __result = *__mem; - *__mem += __val; - - // Release spin lock. - _Atomicity_lock<0>::_S_atomicity_lock = 0; - - return __result; - } - - void - __attribute__ ((__unused__)) - __atomic_add(volatile _Atomic_word* __mem, int __val) - { __exchange_and_add(__mem, __val); } - -_GLIBCXX_END_NAMESPACE |