Question

ARC/ObjC++: ObjC objects as C++ member variable

Consider

class SomeCppClass {
    NSLock * someLock ;
    public:
    SomeCppClass() {
        someLock = [[NSLock alloc] init] ;
    }
    void atomicInsert(SomeOtherCppClass * c) {
        [someLock lock] ;
        // do atomic C++ stuff
        [someLock unlock] ;
    }

    ~SomeCppClass() {
        // ? Huh ?
        // ? can I just say:
        someLock = 0 ;
        // ?
    }
}

Guess I had to encounter the opposite case of my previous question 🙂

Answer 1

Under ARC, when the instance of SomeCppClass is destroyed, someLock will be released automatically. This will happen whether or not you define your own destructor.

You don’t need to assign nil/null to that member in your destructor.