NAME¶

SDL_realloc - Change the size of allocated memory.

HEADER FILE¶

Defined in SDL3/SDL_stdinc.h

SYNOPSIS¶

#include "SDL3/SDL.h"

void * SDL_realloc(void *mem, size_t size);

DESCRIPTION¶

The memory returned by this function must be freed with

SDL_free ().

If size is 0, it will be set to 1. Note that this is unlike some other C runtime realloc implementations, which may treat realloc(mem,0) the same way as free(mem) .

If mem is NULL, the behavior of this function is equivalent to

SDL_malloc (). Otherwise, the function can have one of three possible outcomes:

• If it returns the same pointer as mem , it means that mem was resized
in place without freeing.

• If it returns a different non-NULL pointer, it means that mem was freed
and cannot be dereferenced anymore.

• If it returns NULL (indicating failure), then mem will remain valid and
must still be freed with SDL_free ().

FUNCTION PARAMETERS¶

mem

a pointer to allocated memory to reallocate, or NULL.

size

the new size of the memory.

RETURN VALUE¶

Returns a pointer to the newly allocated memory, or NULL if allocation failed.

THREAD SAFETY¶

It is safe to call this function from any thread.

AVAILABILITY¶

This function is available since SDL 3.1.3.

SEE ALSO¶

•(3), SDL_free(3), •(3), SDL_malloc(3), •(3), SDL_calloc(3)