mirror of
https://github.com/MoleskiCoder/EightBit.git
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111 lines
3.0 KiB
C++
111 lines
3.0 KiB
C++
#pragma once
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#include "EventArgs.h"
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#include "Signal.h"
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#define DECLARE_PIN_SIGNALS(name) \
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Signal<EventArgs> Raising ## name; \
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Signal<EventArgs> Raised ## name; \
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Signal<EventArgs> Lowering ## name; \
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Signal<EventArgs> Lowered ## name;
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#define DECLARE_PIN_LEVEL_RAISE(name) \
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virtual void raise ## name();
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#define DECLARE_PIN_LEVEL_LOWER(name) \
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virtual void lower ## name();
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#define DECLARE_PIN_LEVEL_CHANGERS(name) \
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DECLARE_PIN_LEVEL_RAISE(name) \
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DECLARE_PIN_LEVEL_LOWER(name)
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#define DEFINE_PIN_LEVEL_RAISE(name, within) \
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void EightBit:: within ::raise ## name() { \
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if (lowered( name ())) { \
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Raising ## name.fire(EventArgs::empty()); \
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raise( name ()); \
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Raised ## name.fire(EventArgs::empty()); \
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} \
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}
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#define DEFINE_PIN_LEVEL_LOWER(name, within) \
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void EightBit:: within ::lower ## name() { \
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if (raised( name ())) { \
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Lowering ## name.fire(EventArgs::empty()); \
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lower( name ()); \
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Lowered ## name.fire(EventArgs::empty()); \
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} \
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}
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#define DEFINE_PIN_LEVEL_CHANGERS(name, within) \
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DEFINE_PIN_LEVEL_RAISE(name, within) \
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DEFINE_PIN_LEVEL_LOWER(name, within)
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#define DECLARE_PIN_MEMBER(name) \
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PinLevel m_## name ## _Line = PinLevel::Low;
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#define DEFINE_PIN_ACTIVATOR(name, on, off) \
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template <class T> class _Activate ## name final { \
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T& m_parent; \
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public: \
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_Activate ## name(T& parent) \
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: m_parent(parent) { \
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m_parent. on ## name(); \
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} \
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~_Activate ## name() { \
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m_parent. off ## name(); \
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} \
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};
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#define DEFINE_PIN_ACTIVATOR_LOW(name) \
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DEFINE_PIN_ACTIVATOR(name, lower, raise)
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#define DEFINE_PIN_ACTIVATOR_HIGH(name) \
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DEFINE_PIN_ACTIVATOR(name, raise, lower)
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#define DECLARE_PIN(name, visibility) \
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public: \
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DECLARE_PIN_SIGNALS(name) \
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[[nodiscard]] PinLevel& name () noexcept { \
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return m_## name ## _Line; \
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} \
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visibility : \
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DECLARE_PIN_LEVEL_CHANGERS(name) \
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private: \
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DECLARE_PIN_MEMBER(name)
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// Input pins may be external controlled
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#define DECLARE_PIN_INPUT(name) \
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DECLARE_PIN(name, public)
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// Output pins can only be internally controlled
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#define DECLARE_PIN_OUTPUT(name) \
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DECLARE_PIN(name, protected)
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namespace EightBit {
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class Device {
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public:
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enum class PinLevel {
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Low, High
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};
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[[nodiscard]] static constexpr auto raised(const PinLevel line) { return line == PinLevel::High; }
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static void raise(PinLevel& line) noexcept { line = PinLevel::High; }
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[[nodiscard]] static constexpr auto lowered(const PinLevel line) { return line == PinLevel::Low; }
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static void lower(PinLevel& line) noexcept { line = PinLevel::Low; }
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static void match(PinLevel& line, int condition) noexcept { match(line, condition != 0); }
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static void match(PinLevel& line, bool condition) noexcept { condition ? raise(line) : lower(line); }
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static void match(PinLevel& out, PinLevel in) noexcept { out = in; }
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virtual ~Device() = default;
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[[nodiscard]] bool powered() noexcept { return raised(POWER()); }
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DECLARE_PIN_INPUT(POWER)
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protected:
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Device() noexcept = default;
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};
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}
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