Wrote up cleanup gunk on Mac OS X. Really gunk; I don't like what all this does but I don't think there's another way.

button_darwin.m

@@ -1,30 +1,19 @@
 // 7 april 2015
 #import "uipriv_darwin.h"
 
-#ifdef uiLogAllocations
-@interface loggingNSButton : NSButton
+@interface uiNSButton : NSButton <uiFreeOnDealloc>
+@property uiControl *uiC;
+@property void (*uiOnClicked)(uiControl *, void *);
+@property void *uiOnClickedData;
+@property NSMutableArray *uiFreeList;
 @end
 
-@implementation loggingNSButton
+@implementation uiNSButton
 
-uiLogObjCClassAllocations
+uiLogObjCClassAllocations(uiDoFreeOnDealloc(self.uiFreeList);)
+uiFreeOnDeallocImpl
 
-@end
-#else
-#define loggingNSButton NSButton
-#endif
-
-@interface button : NSObject
-@property uiControl *c;
-@property void (*onClicked)(uiControl *, void *);
-@property void *onClickedData;
-@end
-
-@implementation button
-
-uiLogObjCClassAllocations
-
-- (IBAction)buttonClicked:(id)sender
+- (IBAction)uiButtonClicked:(id)sender
 {
 	(*(self.onClicked))(self.c, self.onClickedData);
 }
@@ -39,21 +28,21 @@ static void defaultOnClicked(uiControl *c, void *data)
 // TODO destruction
 uiControl *uiNewButton(const char *text)
 {
-	button *b;
-	NSButton *bb;
+	uiControl *c;
+	uiNSButton *b;
 
-	b = [button new];
-	b.c = uiDarwinNewControl([loggingNSButton class], NO, NO, b);
+	c = uiDarwinNewControl([uiNSButton class], NO, NO, NULL);
+	b = (uiNSButton *) uiControlHandle(c);
+	b.c = c;
 
-	bb = (NSButton *) uiControlHandle(b.c);
-	[bb setTitle:toNSString(text)];
-	[bb setButtonType:NSMomentaryPushInButton];
-	[bb setBordered:YES];
-	[bb setBezelStyle:NSRoundedBezelStyle];
+	[b setTitle:toNSString(text)];
+	[b setButtonType:NSMomentaryPushInButton];
+	[b setBordered:YES];
+	[b setBezelStyle:NSRoundedBezelStyle];
 	setStandardControlFont((NSControl *) bb);
 
-	[bb setTarget:b];
-	[bb setAction:@selector(buttonClicked:)];
+	[b setTarget:b];
+	[b setAction:@selector(uiButtonClicked:)];
 
 	b.onClicked = defaultOnClicked;
 
@@ -66,7 +55,7 @@ void uiButtonOnClicked(uiControl *c, void (*f)(uiControl *, void *), void *data)
 {
 	button *b;
 
-	b = (button *) uiDarwinControlData(c);
+	b = (uiNSButton *) uiControlHandle(c);
 	b.onClicked = f;
 	b.onClickedData = data;
 }

container_darwin.m

@@ -10,7 +10,10 @@
 // thanks to mikeash and JtRip in irc.freenode.net/#macdev
 @implementation uiContainer
 
-uiLogObjCClassAllocations
+uiLogObjCClassAllocations(
+	if (self.child != NULL)
+		uiControlDestroy(self.child);
+)
 
 - (void)setFrameSize:(NSSize)s
 {

init_darwin.m

@@ -6,7 +6,7 @@
 
 @implementation uiApplication
 
-uiLogObjCClassAllocations
+uiLogObjCClassAllocations()
 
 // hey look! we're overriding terminate:!
 // we're going to make sure we can go back to main() whether Cocoa likes it or not!

newcontrol_darwin.m

@@ -13,6 +13,11 @@ struct uiSingleViewControl {
 
 #define S(c) ((uiSingleViewControl *) (c))
 
+static void singleDestroy(uiControl *c)
+{
+	[S(c)->view release];
+}
+
 static uintptr_t singleHandle(uiControl *c)
 {
 	return (uintptr_t) (S(c)->view);
@@ -59,6 +64,7 @@ static void singleResize(uiControl *c, intmax_t x, intmax_t y, intmax_t width, i
 uiControl *uiDarwinNewControl(Class class, BOOL inScrollView, BOOL scrollViewHasBorder, void *data)
 {
 	uiSingleViewControl *c;
+	uiFreeOnDealloc *freer;
 
 	c = uiNew(uiSingleViewControl);
 	// thanks to autoxr and arwyn in irc.freenode.net/#macdev
@@ -79,6 +85,7 @@ uiControl *uiDarwinNewControl(Class class, BOOL inScrollView, BOOL scrollViewHas
 		c->immediate = (NSView *) (c->scrollView);
 	}
 
+	c->control.destroy = singleDestroy;
 	c->control.handle = singleHandle;
 	c->control.setParent = singleSetParent;
 	c->control.preferredSize = singlePreferredSize;
@@ -86,6 +93,9 @@ uiControl *uiDarwinNewControl(Class class, BOOL inScrollView, BOOL scrollViewHas
 
 	c->data = data;
 
+	freer = (uiFreeOnDealloc *) (c->view);
+	[freer uiFreeOnDealloc:c];
+
 	return (uiControl *) c;
 }
 

uipriv_darwin.h

@@ -14,7 +14,7 @@ struct uiSizing {
 // TODO see if we can override alloc instead
 #ifdef uiLogAllocations
 #import <stdio.h>
-#define uiLogObjCClassAllocations \
+#define uiLogObjCClassAllocations(deallocCode) \
 + (id)alloc \
 { \
 	id thing; \
@@ -24,15 +24,32 @@ struct uiSizing {
 } \
 - (void)dealloc \
 { \
+	deallocCode \
 	[super dealloc]; \
 	fprintf(stderr, "%p free\n", self); \
 }
 #else
-#define uiLogObjCClassAllocations
+#define uiLogObjCClassAllocations(deallocCode) \
+- (void)dealloc \
+{ \
+	deallocCode \
+	[super dealloc]; \
+}
 #endif
 
 // util_darwin.m
 extern void setStandardControlFont(NSControl *);
+@protocol uiFreeOnDealloc
+- (void)uiFreeOnDealloc:(void *)p;
+@end
+#define uiFreeOnDeallocImpl \
+- (void)uiFreeOnDealloc:(void *)p \
+{ \
+	if (self.uiFreeList == nil) \
+		self.uiFreeList = [NSMutableArray new]; \
+	[self.uiFreeList addObject:[NSValue valueWIthPointer:p]]; \
+}
+extern void uiDoFreeOnDealloc(NSMutableArray *);
 
 // container_darwin.m
 @interface uiContainer : NSView

util_darwin.m

@@ -6,3 +6,13 @@ void setStandardControlFont(NSControl *control)
 {
 	[control setFont:[NSFont systemFontOfSize:[NSFont systemFontSizeForControlSize:NSRegularControlSize]]];
 }
+
+void uiDoFreeOnDealloc(NSMutableArray *m)
+{
+	[m enumerateObjectsUsingBlock:^(id obj, NSUInteger index, BOOL *stop) {
+		NSValue *v = (NSValue *) obj;
+
+		uiFree([v pointerValue]);
+	}];
+	[m release];
+}

window_darwin.m

@@ -10,7 +10,7 @@
 
 @implementation loggingNSWindow
 
-uiLogObjCClassAllocations
+uiLogObjCClassAllocations()
 
 @end
 #else
@@ -25,7 +25,7 @@ uiLogObjCClassAllocations
 
 @implementation uiWindowDelegate
 
-uiLogObjCClassAllocations
+uiLogObjCClassAllocations()
 
 - (BOOL)windowShouldClose:(id)win
 {