Function safe_realloc

src/foundation/platform.h:22–32

Safe realloc: frees old pointer on failure instead of leaking it. * Returns NULL on allocation failure (old memory is freed). */

/* Safe realloc: frees old pointer on failure instead of leaking it.
 * Returns NULL on allocation failure (old memory is freed). */
static inline void *safe_realloc(void *ptr, size_t size) {
    enum { SAFE_REALLOC_MIN = 1 };
    if (size == 0) {
        size = SAFE_REALLOC_MIN;
    }
    void *tmp = realloc(ptr, size);
    if (!tmp) {
        free(ptr);
    }
    return tmp;
}

/* Safe free: frees and NULLs a pointer to prevent double-free / use-after-free.
 * Use via the safe_free() macro so the caller's pointer is actually cleared. */