Function debug_ring_write

kernel/src/debug_ring_write.hpp:45–77

<!-- description --> @brief Outputs a character to the serial port. <!-- inputs/outputs --> @param mut_ring the debug ring to output to @param c the character to output

    ///   @param c the character to output
    ///
    constexpr void
    debug_ring_write(loader::debug_ring_t &mut_ring, bsl::char_type const c) noexcept
    {
        bsl::uintmx mut_epos{mut_ring.epos};
        bsl::uintmx mut_spos{mut_ring.spos};

        *mut_ring.buf.at_if(mut_epos) = c;
        ++mut_epos;

        if (mut_epos >= mut_ring.buf.size()) {
            mut_epos = {};
        }
        else {
            bsl::touch();
        }

        if (mut_epos == mut_spos) {
            ++mut_spos;

            if (mut_spos >= mut_ring.buf.size()) {
                mut_spos = {};
            }
            else {
                bsl::touch();
            }
        }
        else {
            bsl::touch();
        }

        mut_ring.epos = mut_epos;
        mut_ring.spos = mut_spos;
    }

    /// <!-- description -->
    ///   @brief Outputs a string to the serial port.