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