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1 | // Boilerplate support routines for -*- C++ -*- dynamic memory management. | |
2 | ||
3 | // Copyright (C) 1997-2024 Free Software Foundation, Inc. | |
4 | // | |
5 | // This file is part of GCC. | |
6 | // | |
7 | // GCC is free software; you can redistribute it and/or modify | |
8 | // it under the terms of the GNU General Public License as published by | |
9 | // the Free Software Foundation; either version 3, or (at your option) | |
10 | // any later version. | |
11 | // | |
12 | // GCC is distributed in the hope that it will be useful, | |
13 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | // GNU General Public License for more details. | |
16 | // | |
17 | // Under Section 7 of GPL version 3, you are granted additional | |
18 | // permissions described in the GCC Runtime Library Exception, version | |
19 | // 3.1, as published by the Free Software Foundation. | |
20 | ||
21 | // You should have received a copy of the GNU General Public License and | |
22 | // a copy of the GCC Runtime Library Exception along with this program; | |
23 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
24 | // <http://www.gnu.org/licenses/>. | |
25 | ||
26 | #include <bits/c++config.h> | |
27 | ||
28 | #if !_GLIBCXX_HOSTED | |
29 | // A freestanding C runtime may not provide "free" -- but there is no | |
30 | // other reasonable way to implement "operator delete". | |
31 | namespace std | |
32 | { | |
33 | _GLIBCXX_BEGIN_NAMESPACE_VERSION | |
34 | extern "C" void free(void*); | |
35 | _GLIBCXX_END_NAMESPACE_VERSION | |
36 | } // namespace | |
37 | #else | |
38 | # include <cstdlib> | |
39 | #endif | |
40 | ||
41 | #include "new" | |
42 | ||
43 | // The sized deletes are defined in other files. | |
44 | #pragma GCC diagnostic ignored "-Wsized-deallocation" | |
45 | ||
46 | _GLIBCXX_WEAK_DEFINITION void | |
47 | operator delete(void* ptr, std::align_val_t) noexcept | |
48 | { | |
49 | #if _GLIBCXX_HAVE_ALIGNED_ALLOC || _GLIBCXX_HAVE_POSIX_MEMALIGN \ | |
50 | || _GLIBCXX_HAVE_MEMALIGN | |
51 | std::free (ptr); | |
52 | #elif _GLIBCXX_HAVE__ALIGNED_MALLOC | |
53 | _aligned_free (ptr); | |
54 | #else | |
55 | if (ptr) | |
56 | std::free (((void **) ptr)[-1]); // See aligned_alloc in new_opa.cc | |
57 | #endif | |
58 | } |