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authorpeter <peter@FreeBSD.org>2008-06-01 00:03:21 +0000
committerpeter <peter@FreeBSD.org>2008-06-01 00:03:21 +0000
commita2be5f0c15218b0177d73b17d9bcb7589965d685 (patch)
treec9f0cd9c22378356a1716d32e13e70bc90f98b9c /libstdc++/include/ext/debug_allocator.h
parent9e0f3cc19c9df1594c9cc36cfd8fddc83c52ad12 (diff)
downloadFreeBSD-src-a2be5f0c15218b0177d73b17d9bcb7589965d685.zip
FreeBSD-src-a2be5f0c15218b0177d73b17d9bcb7589965d685.tar.gz
Reorganize the gcc vendor import work area. This flattens out a bunch
of unnecessary path components that are relics of cvs2svn. (These are directory moves)
Diffstat (limited to 'libstdc++/include/ext/debug_allocator.h')
-rw-r--r--libstdc++/include/ext/debug_allocator.h128
1 files changed, 128 insertions, 0 deletions
diff --git a/libstdc++/include/ext/debug_allocator.h b/libstdc++/include/ext/debug_allocator.h
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+// Allocators -*- C++ -*-
+
+// Copyright (C) 2001, 2002, 2003, 2004, 2005 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+// 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.
+
+/*
+ * Copyright (c) 1996-1997
+ * Silicon Graphics Computer Systems, Inc.
+ *
+ * Permission to use, copy, modify, distribute and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appear in all copies and
+ * that both that copyright notice and this permission notice appear
+ * in supporting documentation. Silicon Graphics makes no
+ * representations about the suitability of this software for any
+ * purpose. It is provided "as is" without express or implied warranty.
+ */
+
+/** @file ext/debug_allocator.h
+ * This file is a GNU extension to the Standard C++ Library.
+ * You should only include this header if you are using GCC 3 or later.
+ */
+
+#ifndef _DEBUG_ALLOCATOR_H
+#define _DEBUG_ALLOCATOR_H 1
+
+#include <stdexcept>
+
+_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
+
+ using std::size_t;
+
+ /**
+ * @brief A meta-allocator with debugging bits, as per [20.4].
+ *
+ * This is precisely the allocator defined in the C++ Standard.
+ * - all allocation calls operator new
+ * - all deallocation calls operator delete
+ */
+ template<typename _Alloc>
+ class debug_allocator
+ {
+ public:
+ typedef typename _Alloc::size_type size_type;
+ typedef typename _Alloc::difference_type difference_type;
+ typedef typename _Alloc::pointer pointer;
+ typedef typename _Alloc::const_pointer const_pointer;
+ typedef typename _Alloc::reference reference;
+ typedef typename _Alloc::const_reference const_reference;
+ typedef typename _Alloc::value_type value_type;
+
+ private:
+ // _M_extra is the number of objects that correspond to the
+ // extra space where debug information is stored.
+ size_type _M_extra;
+
+ _Alloc _M_allocator;
+
+ public:
+ debug_allocator()
+ {
+ const size_t __obj_size = sizeof(value_type);
+ _M_extra = (sizeof(size_type) + __obj_size - 1) / __obj_size;
+ }
+
+ pointer
+ allocate(size_type __n)
+ {
+ pointer __res = _M_allocator.allocate(__n + _M_extra);
+ size_type* __ps = reinterpret_cast<size_type*>(__res);
+ *__ps = __n;
+ return __res + _M_extra;
+ }
+
+ pointer
+ allocate(size_type __n, const void* __hint)
+ {
+ pointer __res = _M_allocator.allocate(__n + _M_extra, __hint);
+ size_type* __ps = reinterpret_cast<size_type*>(__res);
+ *__ps = __n;
+ return __res + _M_extra;
+ }
+
+ void
+ deallocate(pointer __p, size_type __n)
+ {
+ if (__p)
+ {
+ pointer __real_p = __p - _M_extra;
+ if (*reinterpret_cast<size_type*>(__real_p) != __n)
+ {
+ throw std::runtime_error("debug_allocator::deallocate"
+ " wrong size");
+ }
+ _M_allocator.deallocate(__real_p, __n + _M_extra);
+ }
+ else
+ throw std::runtime_error("debug_allocator::deallocate null pointer");
+ }
+ };
+
+_GLIBCXX_END_NAMESPACE
+
+#endif
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