mach msg server

gistfile1.txt

void mach_msg_server(mach_port_t exception_port) {
        mach_msg_return_t r;
        
        r = mach_msg(&msg.head, MACH_RCV_MSG|MACH_RCV_LARGE|MACH_RCV_TIMEOUT, 0, sizeof(msg), exception_port, 0, MACH_PORT_NULL);
        assert(r != MACH_RCV_TIMED_OUT);
        assert (r == MACH_MSG_SUCCESS);
        
        mach_exc_server(&msg.head, &reply.head);
        
        r = mach_msg(&reply.head, MACH_SEND_MSG|MACH_SEND_TIMEOUT, reply.head.msgh_size, 0, MACH_PORT_NULL, 0 ,MACH_PORT_NULL);
        assert(r != MACH_SEND_TIMED_OUT);
        assert(r == MACH_MSG_SUCCESS);
    }