Switched definitively to the works-for-now approach of requiring an explicit opt-in where somebody wants to clock a whole-cycle receiver from a half-cycle clock.

ClockReceiver/ClockReceiver.hpp

@@ -9,6 +9,8 @@
 #ifndef ClockReceiver_hpp
 #define ClockReceiver_hpp
 
+#include <cstdio>
+
 /*!
 	Provides a class that wraps a plain int, providing most of the basic arithmetic and
 	Boolean operators, but forcing callers and receivers to be explicit as to usage.
@@ -118,13 +120,7 @@ class HalfCycles: public WrappedInt<HalfCycles> {
 		inline HalfCycles(const HalfCycles &half_cycles) : WrappedInt<HalfCycles>(half_cycles.length_) {}
 };
 
-/*!
-	ClockReceiver is a template for components that receove a clock, measured either
-	in cycles or in half cycles. They are expected to implement either of the run_for
-	methods and to declare that they are `using` the other; buying into the template
-	means that the other run_for will automatically map appropriately to the implemented
-	one, so callers may use either.
-
+/*
 	Alignment rule:
 
 		run_for(Cycles) may be called only at the start of a cycle. E.g. the following
@@ -150,22 +146,24 @@ class HalfCycles: public WrappedInt<HalfCycles> {
 		of a full cycle. The second will do the second half. Etc.
 
 */
-template <class T> class ClockReceiver {
+
+/*!
+	If a component implements only run_for(Cycles), an owner can wrap it in HalfClockReceiver
+	automatically to gain run_for(HalfCycles).
+*/
+template <class T> class HalfClockReceiver: public T {
 	public:
-		ClockReceiver() : half_cycle_carry_(0) {}
-
-		inline void run_for(const Cycles &cycles) {
-			static_cast<T *>(this)->run_for(HalfCycles(cycles));
-		}
+		using T::T;
 
+		using T::run_for;
 		inline void run_for(const HalfCycles &half_cycles) {
 			int cycles = half_cycles.as_int() + half_cycle_carry_;
 			half_cycle_carry_ = cycles & 1;
-			static_cast<T *>(this)->run_for(Cycles(cycles >> 1));
+			T::run_for(Cycles(cycles >> 1));
 		}
 
 	private:
-		int half_cycle_carry_;
+		int half_cycle_carry_ = 0;
 };
 
 #endif /* ClockReceiver_hpp */

Components/6522/6522.hpp

@@ -13,8 +13,6 @@
 #include <typeinfo>
 #include <cstdio>
 
-#include "../../ClockReceiver/ClockReceiver.hpp"
-
 namespace MOS {
 
 /*!
@@ -28,7 +26,7 @@ namespace MOS {
 	Consumers should derive their own curiously-recurring-template-pattern subclass,
 	implementing bus communications as required.
 */
-template <class T> class MOS6522: public ClockReceiver<MOS6522<T>> {
+template <class T> class MOS6522 {
 	private:
 		enum InterruptFlag: uint8_t {
 			CA2ActiveEdge	= 1 << 0,

Components/6532/6532.hpp

@@ -12,8 +12,6 @@
 #include <cstdint>
 #include <cstdio>
 
-#include "../../ClockReceiver/ClockReceiver.hpp"
-
 namespace MOS {
 
 /*!
@@ -27,7 +25,7 @@ namespace MOS {
 	Consumers should derive their own curiously-recurring-template-pattern subclass,
 	implementing bus communications as required.
 */
-template <class T> class MOS6532: public ClockReceiver<MOS6532<T>> {
+template <class T> class MOS6532 {
 	public:
 		inline void set_ram(uint16_t address, uint8_t value)	{	ram_[address&0x7f] = value;		}
 		inline uint8_t get_ram(uint16_t address)				{	return ram_[address & 0x7f];	}
@@ -106,7 +104,6 @@ template <class T> class MOS6532: public ClockReceiver<MOS6532<T>> {
 			return 0xff;
 		}
 
-		using ClockReceiver<MOS6532<T>>::run_for;
 		inline void run_for(const Cycles &cycles) {
 			unsigned int number_of_cycles = (unsigned int)cycles.as_int();
 

Components/6560/6560.hpp

@@ -41,7 +41,7 @@ class Speaker: public ::Outputs::Filter<Speaker> {
 
 	@c set_register and @c get_register provide register access.
 */
-template <class T> class MOS6560: public ClockReceiver<MOS6560<T>> {
+template <class T> class MOS6560 {
 	public:
 		MOS6560() :
 				crt_(new Outputs::CRT::CRT(65*4, 4, Outputs::CRT::NTSC60, 2)),
@@ -147,7 +147,6 @@ template <class T> class MOS6560: public ClockReceiver<MOS6560<T>> {
 			}
 		}
 
-		using ClockReceiver<MOS6560<T>>::run_for;
 		/*!
 			Runs for cycles. Derr.
 		*/

Machines/Atari2600/TIA.hpp

@@ -12,11 +12,10 @@
 #include <cstdint>
 
 #include "../CRTMachine.hpp"
-#include "../../ClockReceiver/ClockReceiver.hpp"
 
 namespace Atari2600 {
 
-class TIA: public ClockReceiver<TIA> {
+class TIA {
 	public:
 		TIA();
 		// The supplied hook is for unit testing only; if instantiated with a line_end_function then it will
@@ -32,7 +31,6 @@ class TIA: public ClockReceiver<TIA> {
 			Advances the TIA by @c cycles. Any queued setters take effect in the first cycle performed.
 		*/
 		void run_for(const Cycles &cycles);
-		using ClockReceiver<TIA>::run_for;
 		void set_output_mode(OutputMode output_mode);
 
 		void set_sync(bool sync);

Machines/Electron/Electron.hpp

@@ -11,6 +11,7 @@
 
 #include "../../Processors/6502/6502.hpp"
 #include "../../Storage/Tape/Tape.hpp"
+#include "../../ClockReceiver/ClockReceiver.hpp"
 
 #include "../ConfigurationTarget.hpp"
 #include "../CRTMachine.hpp"

Machines/Electron/Video.hpp

@@ -22,7 +22,7 @@ namespace Electron {
 	running either at 40 or 80 columns. Memory is shared between video and CPU; when the video
 	is accessing it the CPU may not.
 */
-class VideoOutput: public ClockReceiver<VideoOutput> {
+class VideoOutput {
 	public:
 		/*!
 			Instantiates a VideoOutput that will read its pixels from @c memory. The pointer supplied
@@ -35,7 +35,6 @@ class VideoOutput: public ClockReceiver<VideoOutput> {
 
 		/// Produces the next @c cycles of video output.
 		void run_for(const Cycles &cycles);
-		using ClockReceiver<VideoOutput>::run_for;
 
 		/*!
 			Writes @c value to the register at @c address. May mutate the results of @c get_next_interrupt,

Machines/Oric/Video.hpp

@@ -14,12 +14,11 @@
 
 namespace Oric {
 
-class VideoOutput: public ClockReceiver<VideoOutput> {
+class VideoOutput {
 	public:
 		VideoOutput(uint8_t *memory);
 		std::shared_ptr<Outputs::CRT::CRT> get_crt();
 		void run_for(const Cycles &cycles);
-		using ClockReceiver<VideoOutput>::run_for;
 		void set_colour_rom(const std::vector<uint8_t> &rom);
 		void set_output_device(Outputs::CRT::OutputDevice output_device);
 

Machines/ZX8081/Video.hpp

@@ -24,7 +24,7 @@ namespace ZX8081 {
 	a 1-bit graphic and output over the next 4 cycles, picking between the white level
 	and the black level.
 */
-class Video: public ClockReceiver<Video> {
+class Video {
 	public:
 		/// Constructs an instance of the video feed; a CRT is also created.
 		Video();
@@ -33,7 +33,6 @@ class Video: public ClockReceiver<Video> {
 
 		/// Advances time by @c cycles.
 		void run_for(const HalfCycles &);
-		using ClockReceiver<Video>::run_for;
 		/// Forces output to catch up to the current output position.
 		void flush();
 

Machines/ZX8081/ZX8081.cpp

@@ -180,7 +180,8 @@ HalfCycles Machine::perform_machine_cycle(const CPU::Z80::PartialMachineCycle &c
 		default: break;
 	}
 
-	if(typer_) typer_->update(cycle.length.as_int());
+	// This will lose some precision; TODO: bring inside the [Half]ClockReceiver domain.
+	if(typer_) typer_->update(cycle.length.as_int() / 2);
 
 	return HalfCycles(0);
 }

Machines/ZX8081/ZX8081.hpp

@@ -100,7 +100,7 @@ class Machine:
 		void set_hsync(bool sync);
 		void update_sync();
 
-		Storage::Tape::BinaryTapePlayer tape_player_;
+		HalfClockReceiver<Storage::Tape::BinaryTapePlayer> tape_player_;
 		Storage::Tape::ZX8081::Parser parser_;
 
 		bool is_zx81_;

Outputs/Speaker.hpp

@@ -135,7 +135,7 @@ class Speaker {
 
 	Call `run_for` to request that the next period of input data is collected.
 */
-template <class T> class Filter: public Speaker, public ClockReceiver<Filter<T>> {
+template <class T> class Filter: public Speaker {
 	public:
 		~Filter() {
 			_queue->flush();

Processors/6502/6502.hpp

@@ -128,7 +128,7 @@ class ProcessorBase {
 	that will cause call outs when the program counter reaches those addresses. @c return_from_subroutine can be used to exit from a
 	jammed state.
 */
-template <class T> class Processor: public ProcessorBase, public ClockReceiver<Processor<T>> {
+template <class T> class Processor: public ProcessorBase {
 	private:
 		const MicroOp *scheduled_program_counter_;
 
@@ -283,7 +283,6 @@ template <class T> class Processor: public ProcessorBase, public ClockReceiver<P
 		}
 
 	public:
-		using ClockReceiver<Processor<T>>::run_for;
 		/*!
 			Runs the 6502 for a supplied number of cycles.
 

Processors/Z80/Z80.hpp

@@ -164,7 +164,7 @@ struct PartialMachineCycle {
 	order to provide the bus on which the Z80 operates and @c flush(), which is called upon completion of a continuous run
 	of cycles to allow a subclass to bring any on-demand activities up to date.
 */
-template <class T> class Processor: public ClockReceiver<Processor<T>> {
+template <class T> class Processor {
 	private:
 		uint8_t a_;
 		RegisterPair bc_, de_, hl_;
@@ -849,7 +849,6 @@ template <class T> class Processor: public ClockReceiver<Processor<T>> {
 			copy_program(irq_mode2_program, irq_program_[2]);
 		}
 
-		using ClockReceiver<Processor<T>>::run_for;
 		/*!
 			Runs the Z80 for a supplied number of cycles.
 

Storage/Disk/DigitalPhaseLockedLoop.hpp

@@ -16,7 +16,7 @@
 
 namespace Storage {
 
-class DigitalPhaseLockedLoop: public ClockReceiver<DigitalPhaseLockedLoop> {
+class DigitalPhaseLockedLoop {
 	public:
 		/*!
 			Instantiates a @c DigitalPhaseLockedLoop.
@@ -32,7 +32,6 @@ class DigitalPhaseLockedLoop: public ClockReceiver<DigitalPhaseLockedLoop> {
 			@c number_of_cycles The time to run the loop for.
 		*/
 		void run_for(const Cycles &cycles);
-		using ClockReceiver<DigitalPhaseLockedLoop>::run_for;
 
 		/*!
 			Announces a pulse at the current time.

Storage/Tape/Tape.hpp

@@ -101,7 +101,6 @@ class TapePlayer: public TimedEventLoop {
 		bool has_tape();
 		std::shared_ptr<Storage::Tape::Tape> get_tape();
 
-		using TimedEventLoop::run_for;
 		void run_for(const Cycles &cycles);
 
 		void run_for_input_pulse();
@@ -132,7 +131,6 @@ class BinaryTapePlayer: public TapePlayer {
 		void set_tape_output(bool set);
 		bool get_input();
 
-		using TapePlayer::run_for;
 		void run_for(const Cycles &cycles);
 
 		class Delegate {

Storage/TimedEventLoop.hpp

@@ -10,7 +10,6 @@
 #define TimedEventLoop_hpp
 
 #include "Storage.hpp"
-
 #include "../ClockReceiver/ClockReceiver.hpp"
 #include "../SignalProcessing/Stepper.hpp"
 
@@ -38,7 +37,7 @@ namespace Storage {
 		@c reset_timer to initiate a distinctly-timed stream or @c jump_to_next_event to short-circuit the timing
 		loop and fast forward immediately to the next event.
 	*/
-	class TimedEventLoop: public ClockReceiver<TimedEventLoop> {
+	class TimedEventLoop {
 		public:
 			/*!
 				Constructs a timed event loop that will be clocked at @c input_clock_rate.
@@ -49,7 +48,6 @@ namespace Storage {
 				Advances the event loop by @c number_of_cycles cycles.
 			*/
 			void run_for(const Cycles &cycles);
-			using ClockReceiver<TimedEventLoop>::run_for;
 
 			/*!
 				@returns the number of whole cycles remaining until the next event is triggered.