CODEWITHSUNDEEP
c++c++11std-function
Cristiano
Cristiano

Reputation: 876

Delete pointer to std::function

I have a function like this:

void cb( void *obj )
{
    if(nullptr != obj)
    {
        auto f = static_cast< function<void()>* >(obj);
        (*f)();
    }
}

and I use it this way:

auto obj = new function<void()> ( bind(&AClass::AMethod, &x) );
cb(obj);

where AClass is a class, AMethod is a method of AClass and x is an instance of AClass.

Now the question is: why deleting the pointer to std::function inside cb makes the program crash:

void cb( void *o )
{
    if(nullptr != o)
    {
        auto f = static_cast< function<void()>* >(o);
        (*f)();
        delete f; // <===
    }
}

whilst deleting it after the call to cb does not?

auto obj = new function<void()> ( bind(&AClass::AMethod, &x) );
cb(obj);
delete obj; // <===

Upvotes: 2

Views: 1743

Answers (1)

goji
goji

Reputation: 7132

This works fine on both g++ 4.8.1 and clang 3.4. Also both show nothing of interest valgrind. So maybe the problem is somewhere else in your code or related to your compiler version?

I tested deleteing at both of the mentioned places.

Upvotes: 2

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