Setting variable to NULL after free
In my company there is a coding rule that says, after freeing any memory, reset the variable to NULL. For example … void … Read more
malloc
What is a Memory Heap?
What is a memory heap ? Best Answer 8
Why malloc+memset is slower than calloc?
It’s known that calloc is different than malloc in that it initializes the memory allocated. With calloc, the memory is set to zero. … Read more
How do malloc() and free() work?
I want to know how malloc and free work. int main() { unsigned char *p = (unsigned char*)malloc(4*sizeof(unsigned char)); memset(p,0,4); strcpy((char*)p,”abcdabcd”); // **deliberately … Read more
Why is the use of alloca() not considered good practice?
alloca() allocates memory on the stack rather than on the heap, as in the case of malloc(). So, when I return from the … Read more
In what cases do I use malloc and/or new?
I see in C++ there are multiple ways to allocate and free data and I understand that when you call malloc you should … Read more
What REALLY happens when you don’t free after malloc before program termination?
We are all taught that you MUST free every pointer that is allocated. I’m a bit curious, though, about the real cost of … Read more
Difference between malloc and calloc?
What is the difference between doing: ptr = malloc (MAXELEMS * sizeof(char *)); or: ptr = calloc (MAXELEMS, sizeof(char*)); When is it a … Read more
Do I cast the result of malloc?
someone suggested in a comment that I should not cast the result of malloc. i.e., I should do this: int *sieve = malloc(sizeof(*sieve) * length); rather than: int … Read more
