Revokes -[CSMachine init] and the slightly troubling create-on-demand semantics it places upon subclasses via .machine. Therefore each machine must announce its own implementation of -init.

OSBindings/Mac/Clock Signal/Machine/CSMachine+Subclassing.h

@@ -11,7 +11,5 @@
 
 @interface CSMachine (Subclassing)
 
-- (CRTMachine::Machine * const)machine;
 - (void)setupOutputWithAspectRatio:(float)aspectRatio;
-
 @end

OSBindings/Mac/Clock Signal/Machine/CSMachine.h

@@ -18,6 +18,15 @@
 
 @interface CSMachine : NSObject
 
+- (instancetype)init NS_UNAVAILABLE;
+/*!
+	Initialises an instance of CSMachine.
+	
+	@param machine The pointer to an instance of @c CRTMachine::Machine* . C++ type is omitted because
+	this header is visible to Swift, and the designated initialiser cannot be placed into a category.
+*/
+- (instancetype)initWithMachine:(void *)machine NS_DESIGNATED_INITIALIZER;
+
 - (void)runForNumberOfCycles:(int)numberOfCycles;
 
 - (float)idealSamplingRateFromRange:(NSRange)range;

OSBindings/Mac/Clock Signal/Machine/CSMachine.mm

@@ -39,14 +39,17 @@ struct MachineDelegate: CRTMachine::Machine::Delegate {
 @implementation CSMachine {
 	SpeakerDelegate _speakerDelegate;
 	MachineDelegate _machineDelegate;
+	CRTMachine::Machine *_machine;
 }
 
-- (instancetype)init {
+- (instancetype)initWithMachine:(void *)machine {
 	self = [super init];
 	if(self) {
+		_machine = (CRTMachine::Machine *)machine;
 		_machineDelegate.machine = self;
-		self.machine->set_delegate(&_machineDelegate);
 		_speakerDelegate.machine = self;
+
+		_machine->set_delegate(&_machineDelegate);
 	}
 	return self;
 }
@@ -66,14 +69,14 @@ struct MachineDelegate: CRTMachine::Machine::Delegate {
 - (void)dealloc {
 	[_view performWithGLContext:^{
 		@synchronized(self) {
-			self.machine->close_output();
+			_machine->close_output();
 		}
 	}];
 }
 
 - (float)idealSamplingRateFromRange:(NSRange)range {
 	@synchronized(self) {
-		std::shared_ptr<Outputs::Speaker> speaker = self.machine->get_speaker();
+		std::shared_ptr<Outputs::Speaker> speaker = _machine->get_speaker();
 		if(speaker)
 		{
 			return speaker->get_ideal_clock_rate_in_range((float)range.location, (float)(range.location + range.length));
@@ -90,7 +93,7 @@ struct MachineDelegate: CRTMachine::Machine::Delegate {
 
 - (BOOL)setSpeakerDelegate:(Outputs::Speaker::Delegate *)delegate sampleRate:(float)sampleRate bufferSize:(NSUInteger)bufferSize {
 	@synchronized(self) {
-		std::shared_ptr<Outputs::Speaker> speaker = self.machine->get_speaker();
+		std::shared_ptr<Outputs::Speaker> speaker = _machine->get_speaker();
 		if(speaker)
 		{
 			speaker->set_output_rate(sampleRate, (int)bufferSize);
@@ -103,7 +106,7 @@ struct MachineDelegate: CRTMachine::Machine::Delegate {
 
 - (void)runForNumberOfCycles:(int)numberOfCycles {
 	@synchronized(self) {
-		self.machine->run_for(Cycles(numberOfCycles));
+		_machine->run_for(Cycles(numberOfCycles));
 	}
 }
 
@@ -115,26 +118,26 @@ struct MachineDelegate: CRTMachine::Machine::Delegate {
 }
 
 - (void)setupOutputWithAspectRatio:(float)aspectRatio {
-	self.machine->setup_output(aspectRatio);
+	_machine->setup_output(aspectRatio);
 
 	// Since OS X v10.6, Macs have had a gamma of 2.2.
-	self.machine->get_crt()->set_output_gamma(2.2f);
+	_machine->get_crt()->set_output_gamma(2.2f);
 }
 
 - (void)drawViewForPixelSize:(CGSize)pixelSize onlyIfDirty:(BOOL)onlyIfDirty {
-	self.machine->get_crt()->draw_frame((unsigned int)pixelSize.width, (unsigned int)pixelSize.height, onlyIfDirty ? true : false);
+	_machine->get_crt()->draw_frame((unsigned int)pixelSize.width, (unsigned int)pixelSize.height, onlyIfDirty ? true : false);
 }
 
 - (double)clockRate {
-	return self.machine->get_clock_rate();
+	return _machine->get_clock_rate();
 }
 
 - (BOOL)clockIsUnlimited {
-	return self.machine->get_clock_is_unlimited() ? YES : NO;
+	return _machine->get_clock_is_unlimited() ? YES : NO;
 }
 
 - (void)paste:(NSString *)paste {
-	Utility::TypeRecipient *typeRecipient = dynamic_cast<Utility::TypeRecipient *>(self.machine);
+	Utility::TypeRecipient *typeRecipient = dynamic_cast<Utility::TypeRecipient *>(_machine);
 	if(typeRecipient)
 		typeRecipient->set_typer_for_string([paste UTF8String]);
 }
@@ -142,7 +145,7 @@ struct MachineDelegate: CRTMachine::Machine::Delegate {
 - (void)applyTarget:(const StaticAnalyser::Target &)target {
 	@synchronized(self) {
 		ConfigurationTarget::Machine *const configurationTarget =
-			dynamic_cast<ConfigurationTarget::Machine *>(self.machine);
+			dynamic_cast<ConfigurationTarget::Machine *>(_machine);
 		if(configurationTarget) configurationTarget->configure_as_target(target);
 	}
 }
@@ -150,7 +153,7 @@ struct MachineDelegate: CRTMachine::Machine::Delegate {
 - (void)applyMedia:(const StaticAnalyser::Media &)media {
 	@synchronized(self) {
 		ConfigurationTarget::Machine *const configurationTarget =
-			dynamic_cast<ConfigurationTarget::Machine *>(self.machine);
+			dynamic_cast<ConfigurationTarget::Machine *>(_machine);
 		if(configurationTarget) configurationTarget->insert_media(media);
 	}
 }

OSBindings/Mac/Clock Signal/Machine/Wrappers/CSAmstradCPC.h

@@ -11,4 +11,6 @@
 
 @interface CSAmstradCPC : CSMachine <CSKeyboardMachine>
 
+- (instancetype)init;
+
 @end

OSBindings/Mac/Clock Signal/Machine/Wrappers/CSAmstradCPC.mm

@@ -18,17 +18,13 @@
 	std::unique_ptr<AmstradCPC::Machine> _amstradCPC;
 }
 
-- (CRTMachine::Machine * const)machine {
-	if(!_amstradCPC) {
-		_amstradCPC.reset(AmstradCPC::Machine::AmstradCPC());
-	}
-	return _amstradCPC.get();
-}
-
 - (instancetype)init {
-	self = [super init];
+	AmstradCPC::Machine *machine = AmstradCPC::Machine::AmstradCPC();
+
+	self = [super initWithMachine:machine];
 	if(self) {
-		[self machine];
+		_amstradCPC.reset(machine);
+
 		NSDictionary *roms = @{
 			@(AmstradCPC::ROMType::OS464) : @"os464",
 			@(AmstradCPC::ROMType::OS664) : @"os664",

OSBindings/Mac/Clock Signal/Machine/Wrappers/CSAtari2600.h

@@ -12,6 +12,8 @@
 
 @interface CSAtari2600 : CSMachine <CSJoystickMachine>
 
+- (instancetype)init;
+
 - (void)setResetLineEnabled:(BOOL)enabled;
 
 @property (nonatomic, assign) BOOL colourButton;

OSBindings/Mac/Clock Signal/Machine/Wrappers/CSAtari2600.mm

@@ -15,11 +15,13 @@
 	std::unique_ptr<Atari2600::Machine> _atari2600;
 }
 
-- (CRTMachine::Machine * const)machine {
+- (instancetype)init {
-	if(!_atari2600) {
+	Atari2600::Machine *machine = Atari2600::Machine::Atari2600();
-		_atari2600.reset(Atari2600::Machine::Atari2600());
+	self = [super initWithMachine:machine];
+	if(self) {
+		_atari2600.reset(machine);
 	}
-	return _atari2600.get();
+	return self;
 }
 
 - (void)setDirection:(CSJoystickDirection)direction onPad:(NSUInteger)pad isPressed:(BOOL)isPressed {

OSBindings/Mac/Clock Signal/Machine/Wrappers/CSElectron.h

@@ -12,6 +12,8 @@
 
 @interface CSElectron : CSMachine <CSKeyboardMachine, CSFastLoading>
 
+- (instancetype)init;
+
 @property (nonatomic, assign) BOOL useFastLoadingHack;
 @property (nonatomic, assign) BOOL useTelevisionOutput;
 

OSBindings/Mac/Clock Signal/Machine/Wrappers/CSElectron.mm

@@ -19,16 +19,13 @@
 	std::unique_ptr<Electron::Machine> _electron;
 }
 
-- (CRTMachine::Machine * const)machine {
-	if(!_electron) {
-		_electron.reset(Electron::Machine::Electron());
-	}
-	return _electron.get();
-}
-
 - (instancetype)init {
-	self = [super init];
+	Electron::Machine *machine = Electron::Machine::Electron();
+
+	self = [super initWithMachine:machine];
 	if(self) {
+		_electron.reset(machine);
+
 		[self setOSROM:[self rom:@"os"]];
 		[self setBASICROM:[self rom:@"basic"]];
 		[self setDFSROM:[self rom:@"DFS-1770-2.20"]];

OSBindings/Mac/Clock Signal/Machine/Wrappers/CSOric.h

@@ -12,6 +12,8 @@
 
 @interface CSOric : CSMachine <CSKeyboardMachine, CSFastLoading>
 
+- (instancetype)init;
+
 @property (nonatomic, assign) BOOL useFastLoadingHack;
 @property (nonatomic, assign) BOOL useCompositeOutput;
 

OSBindings/Mac/Clock Signal/Machine/Wrappers/CSOric.mm

@@ -19,16 +19,13 @@
 	std::unique_ptr<Oric::Machine> _oric;
 }
 
-- (CRTMachine::Machine * const)machine {
-	if(!_oric) {
-		_oric.reset(Oric::Machine::Oric());
-	}
-	return _oric.get();
-}
-
 - (instancetype)init {
-	self = [super init];
+	Oric::Machine *machine = Oric::Machine::Oric();
+
+	self = [super initWithMachine:machine];
 	if(self) {
+		_oric.reset(machine);
+
 		NSData *basic10 = [self rom:@"basic10"];
 		NSData *basic11 = [self rom:@"basic11"];
 		NSData *colour = [self rom:@"colour"];

OSBindings/Mac/Clock Signal/Machine/Wrappers/CSVic20.h

@@ -28,6 +28,8 @@ typedef NS_ENUM(NSInteger, CSVic20MemorySize)
 
 @interface CSVic20 : CSMachine <CSKeyboardMachine, CSFastLoading>
 
+- (instancetype)init;
+
 @property (nonatomic, assign) BOOL useFastLoadingHack;
 @property (nonatomic, assign) CSVic20Country country;
 @property (nonatomic, assign) CSVic20MemorySize memorySize;

OSBindings/Mac/Clock Signal/Machine/Wrappers/CSVic20.mm

@@ -13,6 +13,7 @@
 #include "G64.hpp"
 #include "D64.hpp"
 
+#import "CSmachine+Subclassing.h"
 #import "NSBundle+DataResource.h"
 
 using namespace Commodore::Vic20;
@@ -22,17 +23,14 @@ using namespace Commodore::Vic20;
 	BOOL _joystickMode;
 }
 
-- (CRTMachine::Machine * const)machine	{
-	if(!_vic20) {
-		_vic20.reset(Commodore::Vic20::Machine::Vic20());
-	}
-	return _vic20.get();
-}
 - (NSString *)userDefaultsPrefix		{	return @"vic20";	}
 
 - (instancetype)init {
-	self = [super init];
+	Machine *machine = Commodore::Vic20::Machine::Vic20();
+
+	self = [super initWithMachine:machine];
 	if(self) {
+		_vic20.reset(machine);
 		[self setDriveROM:[[NSBundle mainBundle] dataForResource:@"1540" withExtension:@"bin" subdirectory:@"ROMImages/Commodore1540"]];
 		[self setBASICROM:[self rom:@"basic"]];
 		[self setCountry:CSVic20CountryEuropean];

OSBindings/Mac/Clock Signal/Machine/Wrappers/CSZX8081.h

@@ -12,6 +12,8 @@
 
 @interface CSZX8081 : CSMachine <CSKeyboardMachine, CSFastLoading>
 
+- (instancetype)init;
+
 @property (nonatomic, assign) BOOL useFastLoadingHack;
 
 @property (nonatomic, assign) BOOL useAutomaticTapeMotorControl;

OSBindings/Mac/Clock Signal/Machine/Wrappers/CSZX8081.mm

@@ -18,16 +18,12 @@
 	std::unique_ptr<ZX8081::Machine> _zx8081;
 }
 
-- (CRTMachine::Machine * const)machine {
-	if(!_zx8081) {
-		_zx8081.reset(ZX8081::Machine::ZX8081());
-	}
-	return _zx8081.get();
-}
-
 - (instancetype)init {
-	self = [super init];
+	ZX8081::Machine *machine = ZX8081::Machine::ZX8081();
+
+	self = [super initWithMachine:machine];
 	if(self) {
+		_zx8081.reset(machine);
 		_zx8081->set_rom(ZX8081::ROMType::ZX80, [self rom:@"zx80"].stdVector8);
 		_zx8081->set_rom(ZX8081::ROMType::ZX81, [self rom:@"zx81"].stdVector8);
 	}