question about auto_ptr

[Bruintje Beer]

Does the code below solve memory leaks on variable m if there is an
exception thrown or do I have to cleanup the auto_ptr myself ?

void A::f()
{
try
{
auto_ptr<Object> m(new Object());

some exception thrown

}
catch(MyException& ex)
{
// some stuff
}
}

 

[Ian Collins]

Does the code below solve memory leaks on variable m if there is an
exception thrown or do I have to cleanup the auto_ptr myself ?

No, that's the function of std::auto_ptr.

void A::f()
{
try
{
auto_ptr<Object> m(new Object());

some exception thrown

the object will be freed here.

 

[Vincent Jacques]

Bruintje Beer a écrit :

Does the code below solve memory leaks on variable m if there is an
exception thrown or do I have to cleanup the auto_ptr myself ?

As soon as you put your pointer in auto_ptr, you're assured it will be
deleted when the auto_ptr is destroyed.

void A::f()
{
try
{
auto_ptr<Object> m(new Object());

some exception thrown

}
catch(MyException& ex)
{
// some stuff
}
}

In this code, the auto_ptr is destroyed at the end of the try block
(exception thrown or not), so there is no memory leak.

Cheers,