observable_not.hpp

// Copyright Take Vos 2020.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt)
 
#pragma once
 
#include "observable_unary.hpp"
 
namespace tt::detail {
 
template<typename OT>
class observable_not final : public observable_unary<bool,OT> {
public:
    observable_not(std::shared_ptr<observable_base<OT>> const &operand) noexcept :
        observable_unary<bool,OT>(operand) {}
 
    virtual bool load() const noexcept override {
        ttlet lock = std::scoped_lock(observable_unary<bool,OT>::_mutex);
        return !this->_operand_cache;
    }
 
    virtual bool store(bool const &new_value) noexcept override {
        return this->_operand->store(static_cast<OT>(!new_value));
    }
};
 
}