Man page - sdl_realloc(3)

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Manual

SDL_realloc

NAME
HEADER FILE
SYNOPSIS
DESCRIPTION
FUNCTION PARAMETERS
RETURN VALUE
THREAD SAFETY
AVAILABILITY
SEE ALSO

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 ().

If the allocation is successfully resized, the returned pointer is guaranteed to be aligned to either the fundamental alignment ( alignof(max_align_t) in C11 and later) or 2 sizeof(void ) , whichever is smaller.

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 3.2.0.