I am passing some weakrefs from Python into C++ class, but C++ destructors are actively trying to access the ref when the real object is already dead, obviously it crashes... Is there any Python C...

Currently I encountered a weak link issue on Mac OS X 10.6.7 with Xcode 4.0.2. $ gcc --version i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5666) (dot 3) As the developer document s...

During compiling this C code extern void Default_Handler(void); void NMI_Handler(void) __attribute__ ((weak, alias ("Default_Handler"))); I've recive this error: 'NMI_Handler' aliased to undef...

I'm getting a weird gcc behaviour when dealing with weak const variables on different optimize levels (i.e. -O0 or -O1). Here is the code: def.h: declarations const int var; int copy; int do_copy(v...

For legacy reasons I need to use intrusive pointers, as I need the ability to convert raw pointers to smart pointers. However I noticed there is no weak intrusive pointer for boost. I did find a t...

I have the following piece of code: private final List<WeakReference<T>> slaves; public void updateOrdering() { // removes void weak references // and ensures that weak references...

I always using [weak self] in swift closure to prevent reference cycle. Here is the code below, is it the correct way? someTask(completion: {[weak self] (result) in if self == nil { return } ...

Consider the simple program below: __attribute__((weak)) void weakf(void); int main(int argc, char *argv[]) { weakf(); } When compiling this with gcc and running it on a Linux PC, it segfaults...

I want to build a class TParent containing several child objects by using aggregation. Some of the objects are independant, while some can be also dependant on the other children. All the children ...

I'm using Swift 2 and using WeakContainer as a way to store a set of weak objects, much like NSHashTable.weakObjectsHashTable() struct WeakContainer<T: AnyObject> { weak var value: T? } pu...

If I have a closure in another closure is it enough to use unowned/weak once in the outer closure to avoid retain cycles? Example: foo.aClosure({[unowned self] (allowed: Bool) in if allowed { s...

In GCC, If a variable is declared with weak attribute, and, in (static) linking time, no definition is found, the variable will have address zero, i.e., if a pointer is initialized with the address...

This is used in the weakify pattern of Objective-C My guess is that it means: assign a weak reference to self with the name 'weakSelf' and the typeof self (e.g. MyViewController) If it's correct an...

What is the difference between passing [weak self] as an argument to a closure vs passing [weak self] () For example : dispatch_async(dispatch_get_main_queue()) { [weak self] in //Some code her...

Let's say I have a some objects representing network connections. Once these connections are disconnected, the associated objects disappear. I don't want to hang on to a connection object which is ...

I am a little confused by something I am seeing in Xcode 7, the 3 colors below all have a separate address as you would expect, but the weak colors all have the same address. I understand that the ...

i want to make a weak pointer to self in swift like how we used to in objective-c like __weak Something *weakself = self; I have found people explaining how to use a 'weak self' inside a block,...

I got a problem dealing with soft and weak references. Code has a flag that switches all logic between soft and weak references. And while with weak references all seems to be working ok, with soft...

What is the proper way to add objects in NSMutableArray which is strongly defined by property. [tapBlockView setTapBlock:^(UIImage* image) { [self.myImageArray addObject:image]; // self retain cy...

As you read here in most cases a IBOutlet should be weak. Now as you can read in the development library not all classes support weak references. (e.g. NSTextView). This means you have to use assi...

I'm trying to understand the way ARC works, and as far as I know, I should be doing something wrong here. This is the code I'm using: Interface: @interface ViewController : UIViewController{ } ...

I am currently in a situation like: struct A { shared_ptr<B> b; }; struct B { shared_ptr<A> a; }; //... shared_ptr<A> a(new A()); shared_ptr<B> b(new B()); a->...

There seem to be 3 ways of telling GCC to weak link a symbol: __attribute__((weak_import)) __attribute__((weak)) #pragma weak symbol_name None of these work for me: #pragma weak asdf extern vo...