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#pragma once
#include <utility>
#include <memory>
namespace phosphor
{
namespace inventory
{
namespace manager
{
class Manager;
namespace actions
{
namespace details
{
namespace holder
{
/** @struct Base
* @brief Event action functor holder base.
*
* Provides an un-templated holder for actionsof any type with the correct
* function call signature.
*/
struct Base
{
Base() = default;
virtual ~Base() = default;
Base(const Base&) = delete;
Base& operator=(const Base&) = delete;
Base(Base&&) = default;
Base& operator=(Base&&) = default;
virtual void operator()(Manager &mgr) const = 0;
virtual void operator()(Manager &mgr)
{
const_cast<const Base &>(*this)(mgr);
}
};
/** @struct Holder
* @brief Event action functor holder.
*
* Adapts a functor of any type (with the correct function call
* signature) to a non-templated type usable by the manager for
* actions.
*
* @tparam T - The functor type.
*/
template <typename T>
struct Holder final : public Base
{
Holder() = delete;
~Holder() = default;
Holder(const Holder&) = delete;
Holder & operator=(const Holder&) = delete;
Holder(Holder&&) = default;
Holder& operator=(Holder&&) = default;
explicit Holder(T &&func) : _func(std::forward<T>(func)) {}
virtual void operator()(Manager &mgr) const override
{
_func(mgr);
}
virtual void operator()(Manager &mgr) override
{
_func(mgr);
}
private:
T _func;
};
} // namespace holder
/** @struct Wrapper
* @brief Provides implicit type conversion from action functors.
*
* Converts action functors to ptr-to-holder.
*/
struct Wrapper
{
template <typename T>
Wrapper(T &&func) :
_ptr(static_cast<std::shared_ptr<holder::Base>>(
std::make_shared<holder::Holder<T>>(
std::forward<T>(func)))) { }
~Wrapper() = default;
Wrapper(const Wrapper&) = default;
Wrapper& operator=(const Wrapper&) = delete;
Wrapper(Wrapper&&) = default;
Wrapper& operator=(Wrapper&&) = default;
void operator()(Manager &mgr)
{
(*_ptr)(mgr);
}
void operator()(Manager &mgr) const
{
(*_ptr)(mgr);
}
private:
std::shared_ptr<holder::Base> _ptr;
};
} // namespace details
/** @brief The default action. */
inline void noop(Manager &mgr) noexcept { }
/** @brief Destroy an object action. */
inline auto destroyObject(const char *path)
{
return [path](auto &m){m.destroyObject(path);};
}
} // namespace actions
} // namespace manager
} // namespace inventory
} // namespace phosphor
// vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4
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