Skip to content
Standard C Snippets
Branch: master
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Type Name Latest commit message Commit time
Failed to load latest commit information.

Standard C Snippets

0 Memory Allocation

void * malloc(size_t size)

reserves (bytes * count) and returns a pointer to the allocated memory.

If size is 0, then malloc() returns either NULL, or a unique pointer value that can later be successfully passed to free().

If ptr is NULL, no operation is performed.

void * realloc(void *ptr, size_t size);

If ptr is NULL, then the call is equivalent to malloc(size), for all values of size; if size is equal to zero, and ptr is not NULL, then the call is equivalent to free(ptr).

Unless ptr is NULL, it must have been returned by an earlier call to malloc(), calloc(), or realloc().

If the area pointed to was moved, a free(ptr) is done.

The realloc() function call returns a pointer to the newly allocated memory, which is suitably aligned for any built-in type and may be different from ptr, or NULL if the request fails. If size was equal to 0, either NULL or a pointer suitable to be passed to free() is returned. If realloc() fails, the original block is left untouched; it is not freed or moved.

List of allocating C functions

You can’t perform that action at this time.