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◆ main openmsx / src / debugger / Probe.hh
2.4 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
e8555c89 Andy McCall 1 
#ifndef PROBE_HH
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#define PROBE_HH
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#include "TclObject.hh"
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#include "TraceValue.hh"
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#include "Subject.hh"
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#include "static_string_view.hh"
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#include <string>
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#include <type_traits>
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namespace openmsx {
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class Debugger;
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class ProbeBase : public Subject<ProbeBase>
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{
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public:
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	ProbeBase(const ProbeBase&) = delete;
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	ProbeBase(ProbeBase&&) = delete;
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	ProbeBase& operator=(const ProbeBase&) = delete;
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	ProbeBase& operator=(ProbeBase&&) = delete;
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	[[nodiscard]] const std::string& getName() const { return name; }
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	[[nodiscard]] std::string_view getDescription() const { return description; }
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	[[nodiscard]] virtual TclObject getValue() const = 0;
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	[[nodiscard]] virtual TraceValue getTraceValue() const = 0;
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protected:
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	ProbeBase(Debugger& debugger, std::string name,
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	          static_string_view description);
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	~ProbeBase();
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private:
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	Debugger& debugger;
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	const std::string name;
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	const static_string_view description;
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};
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template<typename T> class Probe final : public ProbeBase
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{
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public:
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	Probe(Debugger& debugger, std::string name,
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	      static_string_view description, T t);
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	Probe& operator=(const T& newValue) {
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		if (value != newValue) {
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			value = newValue;
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			notify();
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		}
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		return *this;
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	}
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	[[nodiscard]] operator const T&() const {
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		return value;
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	}
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private:
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	[[nodiscard]] TclObject getValue() const override;
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	[[nodiscard]] TraceValue getTraceValue() const override;
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	T value;
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};
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template<typename T>
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Probe<T>::Probe(Debugger& debugger_, std::string name_,
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                static_string_view description_, T t)
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	: ProbeBase(debugger_, std::move(name_), std::move(description_))
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	, value(std::move(t))
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{
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}
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template<typename T>
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TclObject Probe<T>::getValue() const
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{
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	return TclObject(value);
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}
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template<typename T>
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TraceValue Probe<T>::getTraceValue() const
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{
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	// Note: T=void is handled by full specialization below
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	if constexpr (std::is_same_v<T, bool>) {
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		return TraceValue{uint64_t(value)};
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	} else if constexpr (std::is_integral_v<T>) {
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		return TraceValue{uint64_t(value)};
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	} else if constexpr (std::is_floating_point_v<T>) {
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		return TraceValue{double(value)};
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	} else {
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		return TraceValue{zstring_view(value)};
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	}
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}
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// specialization for void
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template<> class Probe<void> final : public ProbeBase
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{
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public:
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	Probe(Debugger& debugger, std::string name, static_string_view description);
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	void signal() const;
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private:
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	[[nodiscard]] TclObject getValue() const override;
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	[[nodiscard]] TraceValue getTraceValue() const override;
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};
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} // namespace openmsx
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#endif