stdlib.h> (See libbsd(7) for include usage.)
reallocf(void *ptr, size_t size);
reallocf() function changes the size of the previously allocated memory referenced by ptr to size bytes. The contents of the memory are unchanged up to the lesser of the new and old sizes. If the new size is larger, the contents of the newly allocated portion of the memory are undefined. Upon success, the memory referenced by ptr is freed and a pointer to the newly allocated memory is returned. Note that
reallocf() may move the memory allocation, resulting in a different return value than ptr. If ptr is
reallocf() function behaves identically to
malloc() for the specified size. Upon failure, when the requested memory cannot be allocated, the passed pointer is freed to ease the problems with traditional coding styles for
reallocf() causing memory leaks in libraries.
reallocf() function returns a pointer, possibly identical to ptr, to the allocated memory if successful; otherwise a
NULL pointer is returned, and errno is set to
ENOMEM if the error was the result of an allocation failure. The buffer is deallocated in this case.
brk(2), mmap(2), alloca(3), calloc(3), free(3), malloc(3), posix_memalign(3), realloc(3),
reallocf() function first appeared in FreeBSD 3.0.