mirror of
https://github.com/bitcoin/bitcoin.git
synced 2026-03-20 20:49:50 +01:00
306ccd4927
-BEGIN VERIFY SCRIPT- ./contrib/devtools/copyright_header.py update ./ -END VERIFY SCRIPT- Commits of previous years: - 2021:f47dda2c58- 2020:fa0074e2d8- 2019:aaaaad6ac9
47 lines
1.6 KiB
C++
47 lines
1.6 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
|
|
// Copyright (c) 2009-2022 The Bitcoin Core developers
|
|
// Distributed under the MIT software license, see the accompanying
|
|
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
|
|
|
|
#ifndef BITCOIN_SUPPORT_ALLOCATORS_ZEROAFTERFREE_H
|
|
#define BITCOIN_SUPPORT_ALLOCATORS_ZEROAFTERFREE_H
|
|
|
|
#include <support/cleanse.h>
|
|
|
|
#include <memory>
|
|
#include <vector>
|
|
|
|
template <typename T>
|
|
struct zero_after_free_allocator : public std::allocator<T> {
|
|
using base = std::allocator<T>;
|
|
using traits = std::allocator_traits<base>;
|
|
using size_type = typename traits::size_type;
|
|
using difference_type = typename traits::difference_type;
|
|
using pointer = typename traits::pointer;
|
|
using const_pointer = typename traits::const_pointer;
|
|
using value_type = typename traits::value_type;
|
|
zero_after_free_allocator() noexcept {}
|
|
zero_after_free_allocator(const zero_after_free_allocator& a) noexcept : base(a) {}
|
|
template <typename U>
|
|
zero_after_free_allocator(const zero_after_free_allocator<U>& a) noexcept : base(a)
|
|
{
|
|
}
|
|
~zero_after_free_allocator() noexcept {}
|
|
template <typename _Other>
|
|
struct rebind {
|
|
typedef zero_after_free_allocator<_Other> other;
|
|
};
|
|
|
|
void deallocate(T* p, std::size_t n)
|
|
{
|
|
if (p != nullptr)
|
|
memory_cleanse(p, sizeof(T) * n);
|
|
std::allocator<T>::deallocate(p, n);
|
|
}
|
|
};
|
|
|
|
/** Byte-vector that clears its contents before deletion. */
|
|
using SerializeData = std::vector<std::byte, zero_after_free_allocator<std::byte>>;
|
|
|
|
#endif // BITCOIN_SUPPORT_ALLOCATORS_ZEROAFTERFREE_H
|