Freeing dynamic memory

[Matty_Alan]

Ok so what im going to attempt to do is extend dynamic memory by creating a new slot of dynamic memory, copy the data over so there identical (well except for the new unused space) and then swap the pointers over so the old pointer has the new memory address and the new(temporery) pointer points to the old slot

The question here is when I free the memory allocated to the temp pointer will it free up too much space now that the pointer has been swaped to a smaller array? or will it automaticly detect how big the array is?

cheers Matty

[Dino]

It will be automatically detected and free the correct amount.

What you are doing has already been implemented by realloc().

[laserlight]

Which pointer originally pointed to the first element of the dynamic array does not matter; the size of the array will be accounted for whether you use delete[] (or free(), as the case may be) on one pointer or the other, so long as you get it right.

[Matty_Alan]

What you are doing has already been implemented by realloc().

Oh ok I was under the impression that realloc() only shortend but not extended memory, is there a C++ equivilent of realloc()?

[laserlight]

is there a C++ equivilent of realloc()?

std::realloc()

But no, there is no equivalent in the same vein as new[] and delete[]. Just use a std::vector, or some other appropriate container.

[Matty_Alan]

LOL I was afraid that was going to sound like a stupid question, but you knew what i ment

thanx 4 the help