async_size.hpp

/*
 * VecMem project, part of the ACTS project (R&D line)
 *
 * (c) 2025 CERN for the benefit of the ACTS project
 *
 * Mozilla Public License Version 2.0
 */
#pragma once
 
// Local include(s).
#include "vecmem/memory/unique_ptr.hpp"
#include "vecmem/utils/abstract_event.hpp"
 
// System include(s).
#include <memory>
#include <type_traits>
 
namespace vecmem {
 
template <typename SIZE_TYPE>
class async_size : public abstract_event {
 
public:
    using size_type = SIZE_TYPE;
    using storage_type = unique_alloc_ptr<size_type>;
    using const_reference =
        std::add_lvalue_reference_t<std::add_const_t<size_type>>;
    using event_type = std::unique_ptr<abstract_event>;
 
    async_size(storage_type size, event_type event);
 
    const_reference get() const;
 
 
    void wait() override;
 
    void ignore() override;
 
 
private:
    storage_type m_size;
    event_type m_event;
 
};  // class async_size
 
}  // namespace vecmem
 
// Include the implementation.
#include "vecmem/utils/impl/async_size.ipp"