Question

I have a structure:

typedef struct
{
char *ptr;
} A;

And a map

typedef std::map<std::wstring, A> myMap;

I have allocated memory for the ptr field using malloc while filling up the map.
To prevent memory leaks while clearing the map, I have the following code (actualMap is the actual map that I have to clear):

for (myMap::iterator iter = actualMap.begin(); iter != actualMap.end(); ++iter)
{
    Free((iter->second).ptr);
}
actualMap.clear();

However, when I start the application normally, I’m getting an exception while Free is being executed. This exception is not being generated when I start the application directly via VS2010.
Have I missed something?

Thanks.

Answer 1

I recommend you use C++ std::string instead of raw pointer

struct A
{ 
  std::wstring data;
};

std::map<std::wstring, A> myMap;

actualMap.clear();

A only has one pointer which points to string, so myMap can be:

std::map<std::wstring, std::wstring> myMap;