FTS *
fts_open_b(char * const *argv, int options, fts_block_t compar)
{
FTS *sp;
struct _fts_private *priv;
/* Check arguments. */
if ((errno = _fts_open_argcheck(argv, options)) != 0)
return (NULL);
/* Check to make sure we have the block runtime. */
if (_Block_copy == 0) {
errno = ENOSYS;
return (NULL);
}
/* Allocate/initialize the stream. */
if ((priv = calloc(1, sizeof(*priv))) == NULL)
return (NULL);
sp = &priv->ftsp_fts;
sp->fts_compar_b = _Block_copy(compar);
sp->fts_options = options | FTS_COMPAR_B;
return (_fts_open_common(argv, priv));
}
/**
* Register a block to be performed at exit.
*/
int
atexit_b(atexit_block func)
{
struct atexit_fn fn;
int error;
if (_Block_copy == 0) {
errno = ENOSYS;
return -1;
}
func = _Block_copy(func);
// Blocks are not C++ destructors, but they have the same signature (a
// single void* parameter), so we can pretend that they are.
fn.fn_type = ATEXIT_FN_CXA;
fn.fn_ptr.cxa_func = (void(*)(void*))GET_BLOCK_FUNCTION(func);
fn.fn_arg = func;
fn.fn_dso = NULL;
error = atexit_register(&fn);
return (error);
}
static const void *
BlockRetainCallback(CFAllocatorRef allocator, const void *value)
{
return (const void *) _Block_copy((void *) value);
}
