libstdc++-v3/config/os/irix/atomicity.h

   1 // Low-level functions for atomic operations: IRIX version  -*- C++ -*-
   2
   3 // Copyright (C) 2001, 2004, 2005, 2009 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // Under Section 7 of GPL version 3, you are granted additional
  17 // permissions described in the GCC Runtime Library Exception, version
  18 // 3.1, as published by the Free Software Foundation.
  19
  20 // You should have received a copy of the GNU General Public License and
  21 // a copy of the GCC Runtime Library Exception along with this program;
  22 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23 // <http://www.gnu.org/licenses/>.
  24
  25 #include <mutex.h>
  26 #include <ext/atomicity.h>
  27
  28 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
  29
  30   _Atomic_word
  31   __exchange_and_add(volatile _Atomic_word* __mem, int __val)
  32   { return (_Atomic_word) test_then_add((unsigned long*) const_cast<_Atomic_word*>(__mem), __val); }
  33
  34   void
  35   __atomic_add(volatile _Atomic_word* __mem, int __val)
  36   { __exchange_and_add(__mem, __val); }
  37
  38 _GLIBCXX_END_NAMESPACE