try_pop()

template<typename T , size_t Capacity>

std::optional< T > MayaFlux::Journal::RingBuffer< T, Capacity >::try_pop ( )

inlinenoexcept

Attempt to read an element.

Returns

Element if available, nullopt if buffer empty

Definition at line 50 of file RingBuffer.hpp.

    {
        const auto current_read = m_read_index.load(std::memory_order_relaxed);
 
        if (current_read == m_write_index.load(std::memory_order_acquire)) {
            return std::nullopt;
        }
 
        T item = m_buffer[current_read];
 
        // (release semantics for writer)
        m_read_index.store(increment(current_read), std::memory_order_release);
 
        return item;
    }

References MayaFlux::Journal::RingBuffer< T, Capacity >::increment(), MayaFlux::Journal::RingBuffer< T, Capacity >::m_buffer, MayaFlux::Journal::RingBuffer< T, Capacity >::m_read_index, and MayaFlux::Journal::RingBuffer< T, Capacity >::m_write_index.

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