Re: delete, hash_map

From:
SimpleCode <DragonXLong@gmail.com>
Newsgroups:
comp.lang.c++
Date:
5 May 2007 02:03:56 -0700
Message-ID:
<1178355836.551586.220550@q75g2000hsh.googlegroups.com>

Well, either the object has already been deleted,
or its destructor does an illegal operation (e.g.
maybe a recursion problem?).
It is impossible to tell from the code you've posted.


My code:
#include <hash_map>
stdext::hash_map<moving_vehicle*, COsgCar*> g_hash; //global
variable
typedef pair<moving_vehicle*, COsgCar*> Ptr_Pair;

void COsgView::setRootChild(float x, float y, float z, float angle,
int type, moving_vehicle* pMovingVehicle)
{
                /**** new, only hear ****/
    COsgCar * osgcar = new COsgCar(x, y, z, angle, type);
                g_hash.insert(Ptr_Pair(pMovingVehicle, osgcar));
}

vehicle_node* car_list::delete_car(vehicle_node *k)
{
    stdext::hash_map<moving_vehicle*, COsgCar*>::iterator hash_Iter;
    hash_Iter = g_hash.find(k->vehicle_p);
    if (hash_Iter != g_hash.end())
    {
        COsgCar *p = g_hash[k->vehicle_p];
        g_hash.erase(hash_Iter);
        delete p; /**** If I comment, there is no problem ***/
                                p = NULL;
                }
}

A puzzle.
----------------
Regards Lung

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