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static_container
// vi:set ft=cpp: -*- Mode: C++ -*-
/*
* Copyright (C) 2012-2013 Technische Universität Dresden.
* Copyright (C) 2016-2017, 2020, 2023-2024 Kernkonzept GmbH.
*
* License: see LICENSE.spdx (in this directory or the directories above)
*/
#pragma once
#include <l4/cxx/type_traits>
#include <stddef.h>
namespace cxx {
template< typename T >
class Static_container
{
private:
struct X : T
{
void *operator new (size_t, void *p) noexcept { return p; }
void operator delete (void *) {}
X() = default;
template<typename ...Args>
X(Args && ...a) : T(cxx::forward<Args>(a)...) {}
};
public:
void operator = (Static_container const &) = delete;
Static_container(Static_container const &) = delete;
Static_container() = default;
T *get() { return reinterpret_cast<X*>(_s); }
T *operator -> () { return get(); }
T &operator * () { return *get(); }
operator T* () { return get(); }
void construct()
{ new (reinterpret_cast<void*>(_s)) X; }
template< typename ...Args >
void construct(Args && ...args)
{ new (reinterpret_cast<void*>(_s)) X(cxx::forward<Args>(args)...); }
private:
char _s[sizeof(X)] __attribute__((aligned(__alignof(X))));
};
}
cxx
Our C++ library.
Definition arith:11