af63ba4b30
gcc/cp/ * cp-tree.h (enum cp_tree_index): Add CPTI_ALIGN_TYPE. (align_type_node): New macro. * call.c (build_operator_new_call): Handle C++17 aligned new. (second_parm_is_size_t, build_op_delete_call): Likewise. (non_placement_deallocation_fn_p): Likewise. Rename to usual_deallocation_fn_p. (aligned_allocation_fn_p, aligned_deallocation_fn_p): New. * decl.c (cxx_init_decl_processing): Add aligned new support. * init.c (type_has_new_extended_alignment): New. (build_new_1): Handle aligned new. * tree.c (vec_copy_and_insert): New. gcc/c-family/ * c.opt: Add -faligned-new and -Waligned-new. * c-common.c (max_align_t_align): Split out from... (cxx_fundamental_alignment_p): ...here. * c-common.h: Declare it. * c-cppbuiltin.c (c_cpp_builtins): Handle aligned new. libstdc++-v3/ * libsupc++/new: Declare aligned new/delete operators. * config/abi/pre/gnu.ver: Export them. * configure.ac: Check for aligned_alloc, posix_memalign, memalign, _aligned_malloc. * libsupc++/new_opa.cc: New. * libsupc++/new_opant.cc: New. * libsupc++/new_opva.cc: New. * libsupc++/new_opva.cc: New. * libsupc++/del_opa.cc: New. * libsupc++/del_opant.cc: New. * libsupc++/del_opsa.cc: New. * libsupc++/del_opva.cc: New. * libsupc++/del_opvant.cc: New. * libsupc++/del_opvsa.cc: New. * libsupc++/Makefile.am: Build them. From-SVN: r240056
77 lines
2.2 KiB
C++
77 lines
2.2 KiB
C++
// Support routines for the -*- C++ -*- dynamic memory management.
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// Copyright (C) 1997-2016 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 <stdlib.h>
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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_HAVE_ALIGNED_ALLOC
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#if _GLIBCXX_HAVE__ALIGNED_MALLOC
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#define aligned_alloc(al,sz) _aligned_malloc(sz,al)
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#elif _GLIBCXX_HAVE_POSIX_MEMALIGN
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static inline void*
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aligned_alloc (std::size_t al, std::size_t sz)
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{
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void *ptr;
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int ret = posix_memalign (&ptr, al, sz);
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if (ret == 0)
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return ptr;
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return nullptr;
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}
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#elif _GLIBCXX_HAVE_MEMALIGN
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#include <malloc.h>
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#define aligned_alloc memalign
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#else
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// The C library doesn't provide any aligned allocation functions, declare
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// aligned_alloc and get a link failure if aligned new is used.
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extern "C" void *aligned_alloc(std::size_t, std::size_t);
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#endif
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#endif
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_GLIBCXX_WEAK_DEFINITION void *
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operator new (std::size_t sz, std::align_val_t al)
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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 = aligned_alloc ((std::size_t)al, sz)) == 0,
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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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