mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-03 04:12:10 +08:00
4a94e36819
This commit brings all the changes made by running gdb/copyright.py as per GDB's Start of New Year Procedure. For the avoidance of doubt, all changes in this commits were performed by the script.
68 lines
2.2 KiB
C++
68 lines
2.2 KiB
C++
/* Copyright (C) 2017-2022 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program 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 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program 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 program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef COMMON_DEFAULT_INIT_ALLOC_H
|
|
#define COMMON_DEFAULT_INIT_ALLOC_H
|
|
|
|
namespace gdb {
|
|
|
|
/* An allocator that default constructs using default-initialization
|
|
rather than value-initialization. The idea is to use this when you
|
|
don't want to default construct elements of containers of trivial
|
|
types using zero-initialization. */
|
|
|
|
/* Mostly as implementation convenience, this is implemented as an
|
|
adapter that given an allocator A, overrides 'A::construct()'. 'A'
|
|
defaults to std::allocator<T>. */
|
|
|
|
template<typename T, typename A = std::allocator<T>>
|
|
class default_init_allocator : public A
|
|
{
|
|
public:
|
|
/* Pull in A's ctors. */
|
|
using A::A;
|
|
|
|
/* Override rebind. */
|
|
template<typename U>
|
|
struct rebind
|
|
{
|
|
/* A couple helpers just to make it a bit more readable. */
|
|
typedef std::allocator_traits<A> traits_;
|
|
typedef typename traits_::template rebind_alloc<U> alloc_;
|
|
|
|
/* This is what we're after. */
|
|
typedef default_init_allocator<U, alloc_> other;
|
|
};
|
|
|
|
/* Make the base allocator's construct method(s) visible. */
|
|
using A::construct;
|
|
|
|
/* .. and provide an override/overload for the case of default
|
|
construction (i.e., no arguments). This is where we construct
|
|
with default-init. */
|
|
template <typename U>
|
|
void construct (U *ptr)
|
|
noexcept (std::is_nothrow_default_constructible<U>::value)
|
|
{
|
|
::new ((void *) ptr) U; /* default-init */
|
|
}
|
|
};
|
|
|
|
} /* namespace gdb */
|
|
|
|
#endif /* COMMON_DEFAULT_INIT_ALLOC_H */
|