PORT_FLAG_USE_USER_MEMCPY
bool userCopy = (flags & PORT_FLAG_USE_USER_MEMCPY) != 0;
bool userCopy = (flags & PORT_FLAG_USE_USER_MEMCPY) != 0;
flags | PORT_FLAG_USE_USER_MEMCPY | B_CAN_INTERRUPT, timeout);
flags | PORT_FLAG_USE_USER_MEMCPY | B_CAN_INTERRUPT, timeout);
bufferSize, flags | PORT_FLAG_USE_USER_MEMCPY | B_CAN_INTERRUPT,