memory allocations in c++ functions

[syedshan]

hello every one,

If I allocate a memory using malloc or _aligned_malloc() in some function, note that this is internal to the function only.

Hence when I come out of the function will this memory be released automatically or do I have to release them manually.

It is because when I try to release the memory, it gives me some error.

Thanks

 

[Dan Mills]

You have to release the memory manually, otherwise you get a memory leak once the last pointer to the memory goes out of scope.

I would suspect that you may be writing past the end of the allocated space, or may be modifying the pointer to the memory before passing it to free.

Regards, Dan.

 

[FvM]

Two additional comments:

- An automatic memory allocation and release inside a function can be achieved by using local C++ class objects. If it's appropriate for embedded design depends on the effectivity of your compiler tool and available resources.

- I can imagine only a few cases where malloc() and corresponding free() of local memory makes sense. Usually, temporary local variable storage will be made on the stack.