60 lines
1.8 KiB
C++
60 lines
1.8 KiB
C++
// Support routines for the -*- C++ -*- dynamic memory management.
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// Copyright (C) 1997-2017 Free Software Foundation, Inc.
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//
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// This file is part of GCC.
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//
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// GCC is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 3, or (at your option)
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// any later version.
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//
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// GCC is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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#include <bits/c++config.h>
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#include <cstdlib>
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#include <bits/exception_defines.h>
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#include "new"
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using std::new_handler;
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using std::bad_alloc;
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#if _GLIBCXX_HOSTED
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using std::malloc;
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#else
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// A freestanding C runtime may not provide "malloc" -- but there is no
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// other reasonable way to implement "operator new".
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extern "C" void *malloc (std::size_t);
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#endif
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_GLIBCXX_WEAK_DEFINITION void *
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operator new (std::size_t sz) _GLIBCXX_THROW (std::bad_alloc)
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{
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void *p;
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/* malloc (0) is unpredictable; avoid it. */
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if (sz == 0)
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sz = 1;
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while (__builtin_expect ((p = malloc (sz)) == 0, false))
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{
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new_handler handler = std::get_new_handler ();
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if (! handler)
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_GLIBCXX_THROW_OR_ABORT(bad_alloc());
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handler ();
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}
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return p;
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}
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