Imported gcc-4.4.3

[msp430-gcc.git] / libstdc++-v3 / src / bitmap_allocator.cc

diff --git a/libstdc++-v3/src/bitmap_allocator.cc b/libstdc++-v3/src/bitmap_allocator.cc
new file mode 100644 (file)
index 0000000..686a5ef
--- /dev/null
+++ b/libstdc++-v3/src/bitmap_allocator.cc
@@ -0,0 +1,122 @@
+// Bitmap Allocator. Out of line function definitions. -*- C++ -*-
+
+// Copyright (C) 2004, 2005, 2006, 2007, 2008, 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/bitmap_allocator.h>
+
+_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
+
+  namespace __detail
+  {
+    template class __mini_vector<
+      std::pair<bitmap_allocator<char>::_Alloc_block*,
+               bitmap_allocator<char>::_Alloc_block*> >;
+
+    template class __mini_vector<
+      std::pair<bitmap_allocator<wchar_t>::_Alloc_block*,
+               bitmap_allocator<wchar_t>::_Alloc_block*> >;
+
+    template class __mini_vector<size_t*>;
+
+    template size_t** __lower_bound(size_t**, size_t**, size_t const&, 
+                                   free_list::_LT_pointer_compare);
+  }
+
+  size_t*
+  free_list::
+  _M_get(size_t __sz) throw(std::bad_alloc)
+  {
+#if defined __GTHREADS
+    __mutex_type& __bfl_mutex = _M_get_mutex();
+#endif
+    const vector_type& __free_list = _M_get_free_list();
+    using __gnu_cxx::__detail::__lower_bound;
+    iterator __tmp = __lower_bound(__free_list.begin(), __free_list.end(), 
+                                  __sz, _LT_pointer_compare());
+
+    if (__tmp == __free_list.end() || !_M_should_i_give(**__tmp, __sz))
+      {
+       // We release the lock here, because operator new is
+       // guaranteed to be thread-safe by the underlying
+       // implementation.
+#if defined __GTHREADS
+       __bfl_mutex.unlock();
+#endif
+       // Try twice to get the memory: once directly, and the 2nd
+       // time after clearing the free list. If both fail, then throw
+       // std::bad_alloc().
+       int __ctr = 2;
+       while (__ctr)
+         {
+           size_t* __ret = 0;
+           --__ctr;
+           __try
+             {
+               __ret = reinterpret_cast<size_t*>
+                 (::operator new(__sz + sizeof(size_t)));
+             }
+           __catch(...)
+             {
+               this->_M_clear();
+             }
+           if (!__ret)
+             continue;
+           *__ret = __sz;
+           return __ret + 1;
+         }
+       std::__throw_bad_alloc();
+      }
+    else
+      {
+       size_t* __ret = *__tmp;
+       _M_get_free_list().erase(__tmp);
+#if defined __GTHREADS
+       __bfl_mutex.unlock();
+#endif
+       return __ret + 1;
+      }
+  }
+
+  void
+  free_list::
+  _M_clear()
+  {
+#if defined __GTHREADS
+    __gnu_cxx::__scoped_lock __bfl_lock(_M_get_mutex());
+#endif
+    vector_type& __free_list = _M_get_free_list();
+    iterator __iter = __free_list.begin();
+    while (__iter != __free_list.end())
+      {
+       ::operator delete((void*)*__iter);
+       ++__iter;
+      }
+    __free_list.clear();
+  }
+
+  // Instantiations.
+  template class bitmap_allocator<char>;
+  template class bitmap_allocator<wchar_t>;
+
+_GLIBCXX_END_NAMESPACE