SHM_RENAME_EXCHANGE
SHM_RENAME_EXCHANGE
(flags & SHM_RENAME_EXCHANGE) != 0) {
if ((flags & SHM_RENAME_EXCHANGE) != 0 && fd_to != NULL)
if ((flags & SHM_RENAME_EXCHANGE) != 0 && fd_to != NULL) {
SHM_RENAME_EXCHANGE) == 0,
SHM_RENAME_EXCHANGE) == 0,