SubscriptionHandle.h

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#pragma once
 
#include <RobotAPI/libraries/armem/core/MemoryID.h>
 
namespace armarx::armem::client::util
{
 
    class MemoryListener;
 
    class SubscriptionHandle
    {
        friend class MemoryListener;
 
    public:
        SubscriptionHandle();
        SubscriptionHandle(SubscriptionHandle&& other);
 
        /**
        * @brief Assignment operator.
        *
        * @note Intentional call by value, since this leverages the move constructor. See
        * https://stackoverflow.com/a/11540204 (section "Move assignment operators").
        */
        SubscriptionHandle& operator=(SubscriptionHandle other);
 
        friend void swap(SubscriptionHandle& first, SubscriptionHandle& second);
 
        void release();
 
    private:
        SubscriptionHandle(MemoryListener* memoryListener, const MemoryID& memoryID, long id);
 
    private:
        bool valid = false;
        MemoryListener* memoryListener = nullptr;
        MemoryID memoryID;
        long id = 0;
    };
 
    class ScopedSubscriptionHandle
    {
    public:
        ScopedSubscriptionHandle();
        ScopedSubscriptionHandle(SubscriptionHandle&& handle);
 
        /**
        * @brief Assignment operator.
        *
        * @note Intentional call by value, since this leverages the move constructor. See
        * https://stackoverflow.com/a/11540204 (section "Move assignment operators").
        */
        ScopedSubscriptionHandle& operator=(SubscriptionHandle handle);
 
        ~ScopedSubscriptionHandle();
 
    private:
        SubscriptionHandle handle;
    };
 
    void swap(SubscriptionHandle& first, SubscriptionHandle& second);
 
} // namespace armarx::armem::client::util