0,0 → 1,59 |
// Support routines for the -*- C++ -*- dynamic memory management. |
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// Copyright (C) 1997-2015 Free Software Foundation, Inc. |
// |
// This file is part of GCC. |
// |
// GCC 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. |
// |
// GCC 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/>. |
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#include <bits/c++config.h> |
#include <cstdlib> |
#include <bits/exception_defines.h> |
#include "new" |
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using std::new_handler; |
using std::bad_alloc; |
#if _GLIBCXX_HOSTED |
using std::malloc; |
#else |
// A freestanding C runtime may not provide "malloc" -- but there is no |
// other reasonable way to implement "operator new". |
extern "C" void *malloc (std::size_t); |
#endif |
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_GLIBCXX_WEAK_DEFINITION void * |
operator new (std::size_t sz) _GLIBCXX_THROW (std::bad_alloc) |
{ |
void *p; |
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/* malloc (0) is unpredictable; avoid it. */ |
if (sz == 0) |
sz = 1; |
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while (__builtin_expect ((p = malloc (sz)) == 0, false)) |
{ |
new_handler handler = std::get_new_handler (); |
if (! handler) |
_GLIBCXX_THROW_OR_ABORT(bad_alloc()); |
handler (); |
} |
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return p; |
} |