Imported gcc-4.4.3

[msp430-gcc.git] / libstdc++-v3 / include / debug / safe_iterator.tcc

diff --git a/libstdc++-v3/include/debug/safe_iterator.tcc b/libstdc++-v3/include/debug/safe_iterator.tcc
new file mode 100644 (file)
index 0000000..d4f2aee
--- /dev/null
+++ b/libstdc++-v3/include/debug/safe_iterator.tcc
@@ -0,0 +1,143 @@
+// Debugging iterator implementation (out of line) -*- C++ -*-
+
+// Copyright (C) 2003, 2004, 2005, 2006, 2007, 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/>.
+
+/** @file debug/safe_iterator.tcc
+ *  This file is a GNU debug extension to the Standard C++ Library.
+ */
+
+#ifndef _GLIBCXX_DEBUG_SAFE_ITERATOR_TCC
+#define _GLIBCXX_DEBUG_SAFE_ITERATOR_TCC 1
+
+namespace __gnu_debug
+{
+  template<typename _Iterator, typename _Sequence>
+    bool
+    _Safe_iterator<_Iterator, _Sequence>::
+    _M_can_advance(const difference_type& __n) const
+    {
+      typedef typename _Sequence::const_iterator const_iterator;
+
+      if (this->_M_singular())
+       return false;
+      if (__n == 0)
+       return true;
+      if (__n < 0)
+       {
+         const_iterator __begin =
+           static_cast<const _Sequence*>(_M_sequence)->begin();
+         std::pair<difference_type, _Distance_precision> __dist =
+           this->_M_get_distance(__begin, *this);
+         bool __ok =  ((__dist.second == __dp_exact && __dist.first >= -__n)
+                       || (__dist.second != __dp_exact && __dist.first > 0));
+         return __ok;
+       }
+      else
+       {
+         const_iterator __end =
+           static_cast<const _Sequence*>(_M_sequence)->end();
+         std::pair<difference_type, _Distance_precision> __dist =
+           this->_M_get_distance(*this, __end);
+         bool __ok = ((__dist.second == __dp_exact && __dist.first >= __n)
+                      || (__dist.second != __dp_exact && __dist.first > 0));
+         return __ok;
+       }
+    }
+
+  template<typename _Iterator, typename _Sequence>
+    template<typename _Other>
+      bool
+      _Safe_iterator<_Iterator, _Sequence>::
+      _M_valid_range(const _Safe_iterator<_Other, _Sequence>& __rhs) const
+      {
+       if (!_M_can_compare(__rhs))
+         return false;
+
+       /* Determine if we can order the iterators without the help of
+          the container */
+       std::pair<difference_type, _Distance_precision> __dist =
+         this->_M_get_distance(*this, __rhs);
+       switch (__dist.second) {
+       case __dp_equality:
+         if (__dist.first == 0)
+           return true;
+         break;
+
+       case __dp_sign:
+       case __dp_exact:
+         return __dist.first >= 0;
+       }
+
+       /* We can only test for equality, but check if one of the
+          iterators is at an extreme. */
+       if (_M_is_begin() || __rhs._M_is_end())
+         return true;
+       else if (_M_is_end() || __rhs._M_is_begin())
+         return false;
+
+       // Assume that this is a valid range; we can't check anything else
+       return true;
+      }
+
+  template<typename _Iterator, typename _Sequence>
+    void
+    _Safe_iterator<_Iterator, _Sequence>::
+    _M_invalidate()
+    {
+      __gnu_cxx::__scoped_lock sentry(this->_M_get_mutex());
+      _M_invalidate_single();
+    }
+
+  template<typename _Iterator, typename _Sequence>
+    void
+    _Safe_iterator<_Iterator, _Sequence>::
+    _M_invalidate_single()
+    {
+      typedef typename _Sequence::iterator iterator;
+      typedef typename _Sequence::const_iterator const_iterator;
+
+      if (!this->_M_singular())
+       {
+         for (_Safe_iterator_base* __iter = _M_sequence->_M_iterators;
+              __iter; __iter = __iter->_M_next)
+           {
+             iterator* __victim = static_cast<iterator*>(__iter);
+             if (this->base() == __victim->base())
+               __victim->_M_version = 0;
+           }
+
+         for (_Safe_iterator_base* __iter2 = _M_sequence->_M_const_iterators;
+              __iter2; __iter2 = __iter2->_M_next)
+           {
+             const_iterator* __victim = static_cast<const_iterator*>(__iter2);
+             if (__victim->base() == this->base())
+               __victim->_M_version = 0;
+           }
+         _M_version = 0;
+       }
+    }
+} // namespace __gnu_debug
+
+#endif
+