bitmap_allocator.h: Clean-up add/remove functions.

2004-10-14  Dhruv Matani  <dhruvbird@gmx.net>

	* ext/bitmap_allocator.h: Clean-up add/remove functions.
	* src/bitmap_allocator.cc: New file. Contains the out-of-line
	function definitions, static initialization of variables, and
	explicit instantiations needed for the allocator.
	* src/Makefile.am: Add.
	* src/Makefile.in: Regenerate.
	* config/linker.map.gnu: Add the necessary symbols.

From-SVN: r89042

1 files changed, 133 insertions, 0 deletions

diff --git a/libstdc++-v3/src/bitmap_allocator.cc b/libstdc++-v3/src/bitmap_allocator.cc
new file mode 100644
index 0000000..f37c5dc
--- /dev/null
+++ b/libstdc++-v3/src/bitmap_allocator.cc
@@ -0,0 +1,133 @@
+// Bitmap Allocator. Out of line function definitions. -*- C++ -*-
+
+// Copyright (C) 2004 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 2, 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.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING.  If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction.  Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License.  This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+#include <ext/bitmap_allocator.h>
+
+namespace __gnu_cxx
+{
+  namespace balloc
+  {
+    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<unsigned int*>;
+
+    template unsigned int** __lower_bound
+    (unsigned int**, unsigned int**, 
+     unsigned int const&, free_list::_LT_pointer_compare);
+  }
+
+#if defined __GTHREADS
+  _Mutex free_list::_S_bfl_mutex;
+#endif
+  free_list::vector_type free_list::_S_free_list;
+
+  unsigned int*
+  free_list::
+  _M_get(unsigned int __sz) throw(std::bad_alloc)
+  {
+#if defined __GTHREADS
+    _Lock __bfl_lock(&_S_bfl_mutex);
+    __bfl_lock._M_lock();
+#endif
+    iterator __temp = 
+      __gnu_cxx::balloc::__lower_bound
+      (_S_free_list.begin(), _S_free_list.end(), 
+       __sz, _LT_pointer_compare());
+
+    if (__temp == _S_free_list.end() || !_M_should_i_give(**__temp, __sz))
+      {
+	// We release the lock here, because operator new is
+	// guaranteed to be thread-safe by the underlying
+	// implementation.
+#if defined __GTHREADS
+	__bfl_lock._M_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().
+	unsigned int __ctr = 2;
+	while (__ctr)
+	  {
+	    unsigned int* __ret = 0;
+	    --__ctr;
+	    try
+	      {
+		__ret = reinterpret_cast<unsigned int*>
+		  (::operator new(__sz + sizeof(unsigned int)));
+	      }
+	    catch(...)
+	      {
+		this->_M_clear();
+	      }
+	    if (!__ret)
+	      continue;
+	    *__ret = __sz;
+	    return reinterpret_cast<unsigned int*>
+	      (reinterpret_cast<char*>(__ret) + sizeof(unsigned int));
+	  }
+	throw std::bad_alloc();
+      }
+    else
+      {
+	unsigned int* __ret = *__temp;
+	_S_free_list.erase(__temp);
+#if defined __GTHREADS
+	__bfl_lock._M_unlock();
+#endif
+	return reinterpret_cast<unsigned int*>
+	  (reinterpret_cast<char*>(__ret) + sizeof(unsigned int));
+      }
+  }
+
+  void 
+  free_list::
+  _M_clear()
+  {
+#if defined __GTHREADS
+    _Auto_Lock __bfl_lock(&_S_bfl_mutex);
+#endif
+    iterator __iter = _S_free_list.begin();
+    while (__iter != _S_free_list.end())
+      {
+	operator delete((void*)*__iter);
+	++__iter;
+      }
+    _S_free_list.clear();
+  }
+
+  // Instantiations.
+  template class bitmap_allocator<char>;
+  template class bitmap_allocator<wchar_t>;
+} // namespace __gnu_cxx