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/*
ghostl.h - Implementation of a bare-bones, mostly no-op, C++ STL shell
that allows building some Arduino ESP8266/ESP32
libraries on Aruduino AVR.
Copyright (c) 2019 Dirk O. Kaar. All rights reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __ghostl_h
#define __ghostl_h
#if defined(ARDUINO_ARCH_SAMD)
#include <atomic>
#endif
namespace std
{
#if !defined(ARDUINO_ARCH_SAMD)
typedef enum memory_order {
memory_order_relaxed,
memory_order_acquire,
memory_order_release,
memory_order_seq_cst
} memory_order;
template< typename T > class atomic {
private:
T value;
public:
atomic() {}
atomic(T desired) { value = desired; }
void store(T desired, std::memory_order = std::memory_order_seq_cst) volatile noexcept { value = desired; }
T load(std::memory_order = std::memory_order_seq_cst) const volatile noexcept { return value; }
};
inline void atomic_thread_fence(std::memory_order order) noexcept {}
template< typename T > T&& move(T& t) noexcept { return static_cast<T&&>(t); }
#endif
template< typename T, unsigned long N > struct array
{
T _M_elems[N];
decltype(sizeof(0)) size() const { return N; }
T& operator[](decltype(sizeof(0)) i) { return _M_elems[i]; }
const T& operator[](decltype(sizeof(0)) i) const { return _M_elems[i]; }
};
template< typename T > class unique_ptr
{
public:
using pointer = T*;
unique_ptr() noexcept : ptr(nullptr) {}
unique_ptr(pointer p) : ptr(p) {}
pointer operator->() const noexcept { return ptr; }
T& operator[](decltype(sizeof(0)) i) const { return ptr[i]; }
void reset(pointer p = pointer()) noexcept
{
delete ptr;
ptr = p;
}
T& operator*() const { return *ptr; }
private:
pointer ptr;
};
template< typename T > using function = T*;
using nullptr_t = decltype(nullptr);
template<typename T>
struct identity {
typedef T type;
};
template <typename T>
inline T&& forward(typename identity<T>::type& t) noexcept
{
return static_cast<typename identity<T>::type&&>(t);
}
}
#endif // __ghostl_h