C++ schedule_timeout函数代码示例

/******************************************************************************
 *
 *  usb_cpia_cleanup
 *
 *****************************************************************************/
void cpia2_usb_cleanup(void)
{
	schedule_timeout(2 * HZ);
	usb_deregister(&cpia2_driver);
}

/*
 * receive a message from an RxRPC socket
 * - we need to be careful about two or more threads calling recvmsg
 *   simultaneously
 */
int rxrpc_recvmsg(struct kiocb *iocb, struct socket *sock,
		  struct msghdr *msg, size_t len, int flags)
{
	struct rxrpc_skb_priv *sp;
	struct rxrpc_call *call = NULL, *continue_call = NULL;
	struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
	struct sk_buff *skb;
	long timeo;
	int copy, ret, ullen, offset, copied = 0;
	u32 abort_code;

	DEFINE_WAIT(wait);

	_enter(",,,%zu,%d", len, flags);

	if (flags & (MSG_OOB | MSG_TRUNC))
		return -EOPNOTSUPP;

	ullen = msg->msg_flags & MSG_CMSG_COMPAT ? 4 : sizeof(unsigned long);

	timeo = sock_rcvtimeo(&rx->sk, flags & MSG_DONTWAIT);
	msg->msg_flags |= MSG_MORE;

	lock_sock(&rx->sk);

	for (;;) {
		/* return immediately if a client socket has no outstanding
		 * calls */
		if (RB_EMPTY_ROOT(&rx->calls)) {
			if (copied)
				goto out;
			if (rx->sk.sk_state != RXRPC_SERVER_LISTENING) {
				release_sock(&rx->sk);
				if (continue_call)
					rxrpc_put_call(continue_call);
				return -ENODATA;
			}
		}

		/* get the next message on the Rx queue */
		skb = skb_peek(&rx->sk.sk_receive_queue);
		if (!skb) {
			/* nothing remains on the queue */
			if (copied &&
			    (msg->msg_flags & MSG_PEEK || timeo == 0))
				goto out;

			/* wait for a message to turn up */
			release_sock(&rx->sk);
			prepare_to_wait_exclusive(rx->sk), &wait,
						  TASK_INTERRUPTIBLE);
			ret = sock_error(&rx->sk);
			if (ret)
				goto wait_error;

			if (skb_queue_empty(&rx->sk.sk_receive_queue)) {
				if (signal_pending(current))
					goto wait_interrupted;
				timeo = schedule_timeout(timeo);
			}
			finish_wait(sk_sleep(rx->sk), &wait);
			lock_sock(&rx->sk);
			continue;
		}

	peek_next_packet:
		sp = rxrpc_skb(skb);
		call = sp->call;
		ASSERT(call != NULL);

		_debug("next pkt %s", rxrpc_pkts[sp->hdr.type]);

		/* make sure we wait for the state to be updated in this call */
		spin_lock_bh(&call->lock);
		spin_unlock_bh(&call->lock);

		if (test_bit(RXRPC_CALL_RELEASED, &call->flags)) {
			_debug("packet from released call");
			if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
				BUG();
			rxrpc_free_skb(skb);
			continue;
		}

		/* determine whether to continue last data receive */
		if (continue_call) {
			_debug("maybe cont");
			if (call != continue_call ||
			    skb->mark != RXRPC_SKB_MARK_DATA) {
				release_sock(&rx->sk);
				rxrpc_put_call(continue_call);
				_leave(" = %d [noncont]", copied);
				return copied;
			}
		}
//.........这里部分代码省略.........

static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
			 unsigned char __user *buf, size_t nr)
{
	unsigned char __user *b = buf;
	DECLARE_WAITQUEUE(wait, current);
	int c;
	int minimum, time;
	ssize_t retval = 0;
	ssize_t size;
	long timeout;
	unsigned long flags;
	int packet;
	struct tty_buffer *head;
	int count;

do_it_again:

	if (WARN_ON(!tty->read_buf))
		return -EAGAIN;

	c = job_control(tty, file);
	if (c < 0)
		return c;

	minimum = time = 0;
	timeout = MAX_SCHEDULE_TIMEOUT;
	if (!tty->icanon) {
		time = (HZ / 10) * TIME_CHAR(tty);
		minimum = MIN_CHAR(tty);
		if (minimum) {
			if (time)
				tty->minimum_to_wake = 1;
			else if (!waitqueue_active(&tty->read_wait) ||
				 (tty->minimum_to_wake > minimum))
				tty->minimum_to_wake = minimum;
		} else {
			timeout = 0;
			if (time) {
				timeout = time;
				time = 0;
			}
			tty->minimum_to_wake = minimum = 1;
		}
	}

	if (file->f_flags & O_NONBLOCK) {
		if (!mutex_trylock(&tty->atomic_read_lock))
			return -EAGAIN;
	} else {
		if (mutex_lock_interruptible(&tty->atomic_read_lock))
			return -ERESTARTSYS;
	}
	packet = tty->packet;

	add_wait_queue(&tty->read_wait, &wait);
	while (nr) {
		
		if (packet && tty->link->ctrl_status) {
			unsigned char cs;
			if (b != buf)
				break;
			spin_lock_irqsave(&tty->link->ctrl_lock, flags);
			cs = tty->link->ctrl_status;
			tty->link->ctrl_status = 0;
			spin_unlock_irqrestore(&tty->link->ctrl_lock, flags);
			if (tty_put_user(tty, cs, b++)) {
				retval = -EFAULT;
				b--;
				break;
			}
			nr--;
			break;
		}
		set_current_state(TASK_INTERRUPTIBLE);

		if (((minimum - (b - buf)) < tty->minimum_to_wake) &&
		    ((minimum - (b - buf)) >= 1))
			tty->minimum_to_wake = (minimum - (b - buf));

		if (!input_available_p(tty, 0)) {
			if (test_bit(TTY_OTHER_CLOSED, &tty->flags)) {
				retval = -EIO;
				break;
			}
			if (tty_hung_up_p(file))
				break;
			if (!timeout)
				break;
			if (file->f_flags & O_NONBLOCK) {
				retval = -EAGAIN;
				break;
			}
			if (signal_pending(current)) {
				retval = -ERESTARTSYS;
				break;
			}
			
			n_tty_set_room(tty);
			timeout = schedule_timeout(timeout);
			BUG_ON(!tty->read_buf);
//.........这里部分代码省略.........

static void do_catch_up(struct spk_synth *synth)
{
	int synth_full_val = 0;
	static u_char ch;
	static u_char last = '\0';
	unsigned long flags;
	unsigned long jiff_max;
	unsigned long timeout = msecs_to_jiffies(4000);
	DEFINE_WAIT(wait);
	struct var_t *jiffy_delta;
	struct var_t *delay_time;
	int jiffy_delta_val;
	int delay_time_val;

	jiffy_delta = spk_get_var(JIFFY);
	delay_time = spk_get_var(DELAY);
	spin_lock_irqsave(&speakup_info.spinlock, flags);
	jiffy_delta_val = jiffy_delta->u.n.value;
	spin_unlock_irqrestore(&speakup_info.spinlock, flags);
	jiff_max = jiffies + jiffy_delta_val;

	while (!kthread_should_stop()) {
		/* if no ctl-a in 4, send data anyway */
		spin_lock_irqsave(&flush_lock, flags);
		while (is_flushing && timeout) {
			prepare_to_wait(&flush, &wait, TASK_INTERRUPTIBLE);
			spin_unlock_irqrestore(&flush_lock, flags);
			timeout = schedule_timeout(timeout);
			spin_lock_irqsave(&flush_lock, flags);
		}
		finish_wait(&flush, &wait);
		is_flushing = 0;
		spin_unlock_irqrestore(&flush_lock, flags);

		spin_lock_irqsave(&speakup_info.spinlock, flags);
		if (speakup_info.flushing) {
			speakup_info.flushing = 0;
			spin_unlock_irqrestore(&speakup_info.spinlock, flags);
			synth->flush(synth);
			continue;
		}
		if (synth_buffer_empty()) {
			spin_unlock_irqrestore(&speakup_info.spinlock, flags);
			break;
		}
		ch = synth_buffer_peek();
		set_current_state(TASK_INTERRUPTIBLE);
		delay_time_val = delay_time->u.n.value;
		synth_full_val = synth_full();
		spin_unlock_irqrestore(&speakup_info.spinlock, flags);
		if (ch == '\n')
			ch = 0x0D;
		if (synth_full_val || !spk_serial_out(ch)) {
			schedule_timeout(msecs_to_jiffies(delay_time_val));
			continue;
		}
		set_current_state(TASK_RUNNING);
		spin_lock_irqsave(&speakup_info.spinlock, flags);
		synth_buffer_getc();
		spin_unlock_irqrestore(&speakup_info.spinlock, flags);
		if (ch == '[')
			in_escape = 1;
		else if (ch == ']')
			in_escape = 0;
		else if (ch <= SPACE) {
			if (!in_escape && strchr(",.!?;:", last))
				spk_serial_out(PROCSPEECH);
			if (time_after_eq(jiffies, jiff_max)) {
				if (!in_escape)
					spk_serial_out(PROCSPEECH);
				spin_lock_irqsave(&speakup_info.spinlock,
						flags);
				jiffy_delta_val = jiffy_delta->u.n.value;
				delay_time_val = delay_time->u.n.value;
				spin_unlock_irqrestore(&speakup_info.spinlock,
						flags);
				schedule_timeout(msecs_to_jiffies
						 (delay_time_val));
				jiff_max = jiffies + jiffy_delta_val;
			}
		}
		last = ch;
	}
	if (!in_escape)
		spk_serial_out(PROCSPEECH);
}

static int
lnet_acceptor(void *arg)
{
	struct socket *newsock;
	int rc;
	__u32 magic;
	__u32 peer_ip;
	int peer_port;
	int secure = (int)((long_ptr_t)arg);

	LASSERT(lnet_acceptor_state.pta_sock == NULL);

	cfs_block_allsigs();

	rc = lnet_sock_listen(&lnet_acceptor_state.pta_sock, 0, accept_port,
			      accept_backlog);
	if (rc != 0) {
		if (rc == -EADDRINUSE)
			LCONSOLE_ERROR_MSG(0x122, "Can't start acceptor on port %d: port already in use\n",
					   accept_port);
		else
			LCONSOLE_ERROR_MSG(0x123, "Can't start acceptor on port %d: unexpected error %d\n",
					   accept_port, rc);

		lnet_acceptor_state.pta_sock = NULL;
	} else {
		LCONSOLE(0, "Accept %s, port %d\n", accept_type, accept_port);
	}

	/* set init status and unblock parent */
	lnet_acceptor_state.pta_shutdown = rc;
	complete(&lnet_acceptor_state.pta_signal);

	if (rc != 0)
		return rc;

	while (!lnet_acceptor_state.pta_shutdown) {

		rc = lnet_sock_accept(&newsock, lnet_acceptor_state.pta_sock);
		if (rc != 0) {
			if (rc != -EAGAIN) {
				CWARN("Accept error %d: pausing...\n", rc);
				set_current_state(TASK_UNINTERRUPTIBLE);
				schedule_timeout(cfs_time_seconds(1));
			}
			continue;
		}

		/* maybe the LNet acceptor thread has been waken */
		if (lnet_acceptor_state.pta_shutdown) {
			sock_release(newsock);
			break;
		}

		rc = lnet_sock_getaddr(newsock, 1, &peer_ip, &peer_port);
		if (rc != 0) {
			CERROR("Can't determine new connection's address\n");
			goto failed;
		}

		if (secure && peer_port > LNET_ACCEPTOR_MAX_RESERVED_PORT) {
			CERROR("Refusing connection from %pI4h: insecure port %d\n",
			       &peer_ip, peer_port);
			goto failed;
		}

		rc = lnet_sock_read(newsock, &magic, sizeof(magic),
				    accept_timeout);
		if (rc != 0) {
			CERROR("Error %d reading connection request from %pI4h\n",
				rc, &peer_ip);
			goto failed;
		}

		rc = lnet_accept(newsock, magic);
		if (rc != 0)
			goto failed;

		continue;

failed:
		sock_release(newsock);
	}

	sock_release(lnet_acceptor_state.pta_sock);
	lnet_acceptor_state.pta_sock = NULL;

	CDEBUG(D_NET, "Acceptor stopping\n");

	/* unblock lnet_acceptor_stop() */
	complete(&lnet_acceptor_state.pta_signal);
	return 0;
}

static int init_port(void)
{
	int i, nlow, nhigh;
	
	/* Reserve io region. */
#if defined(LIRC_ALLOW_MMAPPED_IO)
	/* Future MMAP-Developers: Attention!
	   For memory mapped I/O you *might* need to use ioremap() first,
	   for the NSLU2 it's done in boot code. */
	if(((iommap != 0)
	    && (request_mem_region(iommap, 8<<ioshift,
				   LIRC_DRIVER_NAME) == NULL))
	   || ((iommap == 0)
	       && (request_region(io, 8, LIRC_DRIVER_NAME) == NULL)))
#else
	if(request_region(io, 8, LIRC_DRIVER_NAME)==NULL)
#endif
	{
		printk(KERN_ERR  LIRC_DRIVER_NAME  
		       ": port %04x already in use\n", io);
		printk(KERN_WARNING LIRC_DRIVER_NAME  
		       ": use 'setserial /dev/ttySX uart none'\n");
		printk(KERN_WARNING LIRC_DRIVER_NAME  
		       ": or compile the serial port driver as module and\n");
		printk(KERN_WARNING LIRC_DRIVER_NAME  
		       ": make sure this module is loaded first\n");
		return(-EBUSY);
	}
	
	hardware_init_port();

	/* Initialize pulse/space widths */
	init_timing_params(duty_cycle, freq);

	/* If pin is high, then this must be an active low receiver. */
	if(sense==-1)
	{
		/* wait 1/2 sec for the power supply */
		
		set_current_state(TASK_INTERRUPTIBLE);
		schedule_timeout(HZ/2);
		
		/* probe 9 times every 0.04s, collect "votes" for
		   active high/low */
		nlow = 0;
		nhigh = 0;
		for(i = 0; i < 9; i ++)
		{
			if (sinp(UART_MSR) & hardware[type].signal_pin)
			{
				nlow++;
			}
			else
			{
				nhigh++;
			}
			schedule_timeout(HZ/25);
		}
		sense = (nlow >= nhigh ? 1 : 0);
		printk(KERN_INFO  LIRC_DRIVER_NAME  ": auto-detected active "
		       "%s receiver\n",sense ? "low":"high");
	}
	else
	{
		printk(KERN_INFO  LIRC_DRIVER_NAME  ": Manually using active "
		       "%s receiver\n",sense ? "low":"high");
	};
	
	return 0;
}

static int cifs_oplock_thread(void * dummyarg)
{
    struct oplock_q_entry * oplock_item;
    struct cifsTconInfo *pTcon;
    struct inode * inode;
    __u16  netfid;
    int rc;

    daemonize("cifsoplockd");
    allow_signal(SIGTERM);

    oplockThread = current;
    do {
        set_current_state(TASK_INTERRUPTIBLE);

        schedule_timeout(1*HZ);
        spin_lock(&GlobalMid_Lock);
        if(list_empty(&GlobalOplock_Q)) {
            spin_unlock(&GlobalMid_Lock);
            set_current_state(TASK_INTERRUPTIBLE);
            schedule_timeout(39*HZ);
        } else {
            oplock_item = list_entry(GlobalOplock_Q.next,
                                     struct oplock_q_entry, qhead);
            if(oplock_item) {
                cFYI(1,("found oplock item to write out"));
                pTcon = oplock_item->tcon;
                inode = oplock_item->pinode;
                netfid = oplock_item->netfid;
                spin_unlock(&GlobalMid_Lock);
                DeleteOplockQEntry(oplock_item);
                /* can not grab inode sem here since it would
                deadlock when oplock received on delete
                since vfs_unlink holds the i_sem across
                the call */
                /* down(&inode->i_sem);*/
                if (S_ISREG(inode->i_mode)) {
                    rc = filemap_fdatawrite(inode->i_mapping);
                    if(CIFS_I(inode)->clientCanCacheRead == 0) {
                        filemap_fdatawait(inode->i_mapping);
                        invalidate_remote_inode(inode);
                    }
                } else
                    rc = 0;
                /* up(&inode->i_sem);*/
                if (rc)
                    CIFS_I(inode)->write_behind_rc = rc;
                cFYI(1,("Oplock flush inode %p rc %d",inode,rc));

                /* releasing a stale oplock after recent reconnection
                of smb session using a now incorrect file
                handle is not a data integrity issue but do
                not bother sending an oplock release if session
                to server still is disconnected since oplock
                already released by the server in that case */
                if(pTcon->tidStatus != CifsNeedReconnect) {
                    rc = CIFSSMBLock(0, pTcon, netfid,
                                     0 /* len */ , 0 /* offset */, 0,
                                     0, LOCKING_ANDX_OPLOCK_RELEASE,
                                     0 /* wait flag */);
                    cFYI(1,("Oplock release rc = %d ",rc));
                }
            } else
                spin_unlock(&GlobalMid_Lock);
        }
    } while(!signal_pending(current));
    complete_and_exit (&cifs_oplock_exited, 0);
    oplockThread = NULL;
}

void
one_core_wq_wait( OneCore      *core,
                  OneWaitQueue *queue,
                  int          *timeout_ms )
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0)
     DEFINE_WAIT(wait);

     int timeout = 0;

     if (timeout_ms)
          timeout = *timeout_ms * HZ / 1000;


     D_MAGIC_ASSERT( core, OneCore );
     D_MAGIC_ASSERT( queue, OneWaitQueue );

     prepare_to_wait( &queue->queue, &wait, TASK_INTERRUPTIBLE );

     one_core_unlock( core );

     if (timeout_ms) {
          timeout = schedule_timeout(timeout);
          if (timeout) {
               timeout = timeout * 1000 / HZ;

               *timeout_ms = timeout ? timeout : 1;
          }
          else
               *timeout_ms = 0;
     }
     else
          schedule();

     one_core_lock( core );

     finish_wait( &queue->queue, &wait );
#else
     wait_queue_t wait;
     int          timeout = 0;

     if (timeout_ms)
          timeout = *timeout_ms * HZ / 1000;


     D_MAGIC_ASSERT( core, OneCore );
     D_MAGIC_ASSERT( queue, OneWaitQueue );

     init_waitqueue_entry(&wait, current);

     current->state = TASK_INTERRUPTIBLE;

     write_lock( &queue->queue.lock);
     __add_wait_queue( &queue->queue, &wait);
     write_unlock( &queue->queue.lock );

     one_core_unlock( core );

     if (timeout_ms) {
          timeout = schedule_timeout(timeout);
          if (timeout) {
               timeout = timeout * 1000 / HZ;

               *timeout_ms = timeout ? timeout : 1;
          }
          else
               *timeout_ms = 0;
     }
     else
          schedule();

     one_core_lock( core );

     write_lock( &queue->queue.lock );
     __remove_wait_queue( &queue->queue, &wait );
     write_unlock( &queue->queue.lock );
#endif
}

static void do_catch_up(struct spk_synth *synth)
{
	u_char ch;
	static u_char last;
	unsigned long flags;
	unsigned long jiff_max;
	struct var_t *jiffy_delta;
	struct var_t *delay_time;
	int jiffy_delta_val;
	int delay_time_val;

	jiffy_delta = spk_get_var(JIFFY);
	delay_time = spk_get_var(DELAY);
	spk_lock(flags);
	jiffy_delta_val = jiffy_delta->u.n.value;
	spk_unlock(flags);
	jiff_max = jiffies + jiffy_delta_val;

	while (!kthread_should_stop()) {
		spk_lock(flags);
		if (speakup_info.flushing) {
			speakup_info.flushing = 0;
			spk_unlock(flags);
			synth->flush(synth);
			continue;
		}
		if (synth_buffer_empty()) {
			spk_unlock(flags);
			break;
		}
		ch = synth_buffer_peek();
		set_current_state(TASK_INTERRUPTIBLE);
		delay_time_val = delay_time->u.n.value;
		spk_unlock(flags);
		if (ch == '\n')
			ch = 0x0D;
		if (dt_sendchar(ch)) {
			schedule_timeout(msecs_to_jiffies(delay_time_val));
			continue;
		}
		set_current_state(TASK_RUNNING);
		spk_lock(flags);
		synth_buffer_getc();
		spk_unlock(flags);
		if (ch == '[')
			in_escape = 1;
		else if (ch == ']')
			in_escape = 0;
		else if (ch <= SPACE) {
			if (!in_escape && strchr(",.!?;:", last))
				dt_sendchar(PROCSPEECH);
			if (jiffies >= jiff_max) {
				if (!in_escape)
					dt_sendchar(PROCSPEECH);
				spk_lock(flags);
				jiffy_delta_val = jiffy_delta->u.n.value;
				delay_time_val = delay_time->u.n.value;
				spk_unlock(flags);
				schedule_timeout(msecs_to_jiffies
						 (delay_time_val));
				jiff_max = jiffies + jiffy_delta_val;
			}
		}
		last = ch;
		ch = 0;
	}
	if (!in_escape)
		dt_sendchar(PROCSPEECH);
}

static void do_catch_up(struct spk_synth *synth)
{
	u_char ch;
	int timeout;
	unsigned long flags;
	unsigned long jiff_max;
	struct var_t *jiffy_delta;
	struct var_t *delay_time;
	struct var_t *full_time;
	int delay_time_val;
	int full_time_val;
	int jiffy_delta_val;

	jiffy_delta = get_var(JIFFY);
	delay_time = get_var(DELAY);
	full_time = get_var(FULL);
spk_lock(flags);
	jiffy_delta_val = jiffy_delta->u.n.value;
	spk_unlock(flags);

	jiff_max = jiffies + jiffy_delta_val;
	while (!kthread_should_stop()) {
		spk_lock(flags);
		if (speakup_info.flushing) {
			speakup_info.flushing = 0;
			spk_unlock(flags);
			synth->flush(synth);
			continue;
		}
		if (synth_buffer_empty()) {
			spk_unlock(flags);
			break;
		}
		set_current_state(TASK_INTERRUPTIBLE);
		full_time_val = full_time->u.n.value;
		spk_unlock(flags);
		if (synth_full()) {
			schedule_timeout(msecs_to_jiffies(full_time_val));
			continue;
		}
		set_current_state(TASK_RUNNING);
		timeout = 1000;
		while (synth_writable())
			if (--timeout <= 0)
				break;
		if (timeout <= 0) {
			oops();
			break;
		}
		spk_lock(flags);
		ch = synth_buffer_getc();
		spk_unlock(flags);
		if (ch == '\n')
			ch = PROCSPEECH;
		outb_p(ch, synth_port);
		SWAIT;
		if ((jiffies >= jiff_max) && (ch == SPACE)) {
			timeout = 1000;
			while (synth_writable())
				if (--timeout <= 0)
					break;
			if (timeout <= 0) {
				oops();
				break;
			}
			outb_p(PROCSPEECH, synth_port);
			spk_lock(flags);
			jiffy_delta_val = jiffy_delta->u.n.value;
			delay_time_val = delay_time->u.n.value;
			spk_unlock(flags);
			schedule_timeout(msecs_to_jiffies(delay_time_val));
			jiff_max = jiffies+jiffy_delta_val;
		}
	}
	timeout = 1000;
	while (synth_writable())
		if (--timeout <= 0)
			break;
	if (timeout <= 0)
		oops();
	else
		outb_p(PROCSPEECH, synth_port);
}

static void do_catch_up(struct spk_synth *synth)
{
	u_char ch;
	unsigned long flags;
	unsigned long jiff_max;
	int timeout;
	int delay_time_val;
	int jiffy_delta_val;
	int full_time_val;
	struct var_t *delay_time;
	struct var_t *full_time;
	struct var_t *jiffy_delta;

	jiffy_delta = spk_get_var(JIFFY);
	delay_time = spk_get_var(DELAY);
	full_time = spk_get_var(FULL);

	spin_lock_irqsave(&speakup_info.spinlock, flags);
	jiffy_delta_val = jiffy_delta->u.n.value;
	spin_unlock_irqrestore(&speakup_info.spinlock, flags);

	jiff_max = jiffies + jiffy_delta_val;
	while (!kthread_should_stop()) {
		spin_lock_irqsave(&speakup_info.spinlock, flags);
		if (speakup_info.flushing) {
			speakup_info.flushing = 0;
			spin_unlock_irqrestore(&speakup_info.spinlock, flags);
			synth->flush(synth);
			continue;
		}
		if (synth_buffer_empty()) {
			spin_unlock_irqrestore(&speakup_info.spinlock, flags);
			break;
		}
		set_current_state(TASK_INTERRUPTIBLE);
		full_time_val = full_time->u.n.value;
		spin_unlock_irqrestore(&speakup_info.spinlock, flags);
		if (synth_full()) {
			schedule_timeout(msecs_to_jiffies(full_time_val));
			continue;
		}
		set_current_state(TASK_RUNNING);
		timeout = SPK_XMITR_TIMEOUT;
		while (synth_writable()) {
			if (!--timeout)
				break;
			udelay(1);
		}
		spin_lock_irqsave(&speakup_info.spinlock, flags);
		ch = synth_buffer_getc();
		spin_unlock_irqrestore(&speakup_info.spinlock, flags);
		if (ch == '\n')
			ch = PROCSPEECH;
		outb_p(ch, speakup_info.port_tts);
		if (time_after_eq(jiffies, jiff_max) && ch == SPACE) {
			timeout = SPK_XMITR_TIMEOUT;
			while (synth_writable()) {
				if (!--timeout)
					break;
				udelay(1);
			}
			outb_p(PROCSPEECH, speakup_info.port_tts);
			spin_lock_irqsave(&speakup_info.spinlock, flags);
			jiffy_delta_val = jiffy_delta->u.n.value;
			delay_time_val = delay_time->u.n.value;
			spin_unlock_irqrestore(&speakup_info.spinlock, flags);
			schedule_timeout(msecs_to_jiffies(delay_time_val));
			jiff_max = jiffies+jiffy_delta_val;
		}
	}
	timeout = SPK_XMITR_TIMEOUT;
	while (synth_writable()) {
		if (!--timeout)
			break;
		udelay(1);
	}
	outb_p(PROCSPEECH, speakup_info.port_tts);
}

//.........这里部分代码省略.........
	return 0;
}

static ssize_t ad1889_write(struct file *file, const char __user *buffer, size_t count,
	loff_t *ppos)
{
	ad1889_dev_t *dev = (ad1889_dev_t *)file->private_data;
	ad1889_state_t *state = &dev->state[AD_WAV_STATE];
	volatile struct dmabuf *dmabuf = &state->dmabuf;
	ssize_t ret = 0;
	DECLARE_WAITQUEUE(wait, current);

	down(&state->sem);
#if 0
	if (dmabuf->mapped) {
		ret = -ENXIO;
		goto err1;
	}
#endif
	if (!access_ok(VERIFY_READ, buffer, count)) {
		ret = -EFAULT;
		goto err1;
	}

	add_wait_queue(&state->dmabuf.wait, &wait);

	/* start filling dma buffer.... */
	while (count > 0) {
		long rem;
		long cnt = count;
		unsigned long flags;

		for (;;) {
			long used_bytes;
			long timeout;	/* max time for DMA in jiffies */

			/* buffer is full if wr catches up to rd */
			spin_lock_irqsave(&state->card->lock, flags);
			used_bytes = dmabuf->wr_ptr - dmabuf->rd_ptr;
			timeout = (dmabuf->dma_len * HZ) / dmabuf->rate;
			spin_unlock_irqrestore(&state->card->lock, flags);

			/* adjust for buffer wrap around */
			used_bytes = (used_bytes + DMA_SIZE) & (DMA_SIZE - 1);

			/* If at least one page unused */
			if (used_bytes < (DMA_SIZE - 0x1000))
				break;

			/* dma buffer full */

			if (file->f_flags & O_NONBLOCK) {
				ret = -EAGAIN;
				goto err2;
			}

			set_current_state(TASK_INTERRUPTIBLE);
			schedule_timeout(timeout + 1);
			if (signal_pending(current)) {
				ret = -ERESTARTSYS;
				goto err2;
			}
		}

		/* watch out for wrapping around static buffer */
		spin_lock_irqsave(&state->card->lock, flags);
		rem = DMA_SIZE - dmabuf->wr_ptr;
		if (cnt > rem)
			cnt = rem;

		rem = dmabuf->wr_ptr;

		/* update dma pointers */
		dmabuf->wr_ptr += cnt;
		dmabuf->wr_ptr &= DMA_SIZE - 1;	/* wrap ptr if necessary */
		spin_unlock_irqrestore(&state->card->lock, flags);

		/* transfer unwrapped chunk */
		if (copy_from_user(dmabuf->rawbuf + rem, buffer, cnt)) {
			ret = -EFAULT;
			goto err2;
		}

		DBG("Writing 0x%lx bytes to +0x%lx\n", cnt, rem);

		/* update counters */
		count -= cnt;
		buffer += cnt;
		ret += cnt;

		/* we have something to play - go play it! */
		ad1889_trigger_playback(dev);
	}

err2:
	remove_wait_queue(&state->dmabuf.wait, &wait);
err1:
	up(&state->sem);
	return ret;
}

static int
zpios_thread_main(void *data)
{
	thread_data_t *thr = (thread_data_t *)data;
	run_args_t *run_args = thr->run_args;
	zpios_time_t t;
	dmu_obj_t obj;
	__u64 offset;
	__u32 chunk_size;
	zpios_region_t *region;
	char *buf;
	unsigned int random_int;
	int chunk_noise = run_args->chunk_noise;
	int chunk_noise_tmp = 0;
	int thread_delay = run_args->thread_delay;
	int thread_delay_tmp = 0;
	int i, rc = 0;

	if (chunk_noise) {
		get_random_bytes(&random_int, sizeof (unsigned int));
		chunk_noise_tmp = (random_int % (chunk_noise * 2))-chunk_noise;
	}

	/*
	 * It's OK to vmem_alloc() this memory because it will be copied
	 * in to the slab and pointers to the slab copy will be setup in
	 * the bio when the IO is submitted.  This of course is not ideal
	 * since we want a zero-copy IO path if possible.  It would be nice
	 * to have direct access to those slab entries.
	 */
	chunk_size = run_args->chunk_size + chunk_noise_tmp;
	buf = (char *)vmem_alloc(chunk_size, KM_SLEEP);
	ASSERT(buf);

	/* Trivial data verification pattern for now. */
	if (run_args->flags & DMU_VERIFY)
		memset(buf, 'z', chunk_size);

	/* Write phase */
	mutex_enter(&thr->lock);
	thr->stats.wr_time.start = zpios_timespec_now();
	mutex_exit(&thr->lock);

	while (zpios_get_work_item(run_args, &obj, &offset,
	    &chunk_size, &region, DMU_WRITE)) {
		if (thread_delay) {
			get_random_bytes(&random_int, sizeof (unsigned int));
			thread_delay_tmp = random_int % thread_delay;
			set_current_state(TASK_UNINTERRUPTIBLE);
			schedule_timeout(thread_delay_tmp); /* In jiffies */
		}

		t.start = zpios_timespec_now();
		rc = zpios_dmu_write(run_args, obj.os, obj.obj,
		    offset, chunk_size, buf);
		t.stop  = zpios_timespec_now();
		t.delta = zpios_timespec_sub(t.stop, t.start);

		if (rc) {
			zpios_print(run_args->file, "IO error while doing "
			    "dmu_write(): %d\n", rc);
			break;
		}

		mutex_enter(&thr->lock);
		thr->stats.wr_data += chunk_size;
		thr->stats.wr_chunks++;
		thr->stats.wr_time.delta = zpios_timespec_add(
		    thr->stats.wr_time.delta, t.delta);
		mutex_exit(&thr->lock);

		mutex_enter(&region->lock);
		region->stats.wr_data += chunk_size;
		region->stats.wr_chunks++;
		region->stats.wr_time.delta = zpios_timespec_add(
		    region->stats.wr_time.delta, t.delta);

		/* First time region was accessed */
		if (region->init_offset == offset)
			region->stats.wr_time.start = t.start;

		mutex_exit(&region->lock);
	}

	mutex_enter(&run_args->lock_ctl);
	run_args->threads_done++;
	mutex_exit(&run_args->lock_ctl);

	mutex_enter(&thr->lock);
	thr->rc = rc;
	thr->stats.wr_time.stop = zpios_timespec_now();
	mutex_exit(&thr->lock);
	wake_up(&run_args->waitq);

	set_current_state(TASK_UNINTERRUPTIBLE);
	schedule();

	/* Check if we should exit */
	mutex_enter(&thr->lock);
	rc = thr->rc;
//.........这里部分代码省略.........

int vmw_fallback_wait(struct vmw_private *dev_priv,
		      bool lazy,
		      bool fifo_idle,
		      uint32_t sequence,
		      bool interruptible,
		      unsigned long timeout)
{
	struct vmw_fifo_state *fifo_state = &dev_priv->fifo;

	uint32_t count = 0;
	uint32_t signal_seq;
	int ret;
	unsigned long end_jiffies = jiffies + timeout;
	bool (*wait_condition)(struct vmw_private *, uint32_t);
	DEFINE_WAIT(__wait);

	wait_condition = (fifo_idle) ? &vmw_fifo_idle :
		&vmw_fence_signaled;

	/**
	 * Block command submission while waiting for idle.
	 */

	if (fifo_idle)
		down_read(&fifo_state->rwsem);
	signal_seq = atomic_read_unchecked(&dev_priv->fence_seq);
	ret = 0;

	for (;;) {
		prepare_to_wait(&dev_priv->fence_queue, &__wait,
				(interruptible) ?
				TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE);
		if (wait_condition(dev_priv, sequence))
			break;
		if (time_after_eq(jiffies, end_jiffies)) {
			DRM_ERROR("SVGA device lockup.\n");
			break;
		}
		if (lazy)
			schedule_timeout(1);
		else if ((++count & 0x0F) == 0) {
			/**
			 * FIXME: Use schedule_hr_timeout here for
			 * newer kernels and lower CPU utilization.
			 */

			__set_current_state(TASK_RUNNING);
			schedule();
			__set_current_state((interruptible) ?
					    TASK_INTERRUPTIBLE :
					    TASK_UNINTERRUPTIBLE);
		}
		if (interruptible && signal_pending(current)) {
			ret = -ERESTARTSYS;
			break;
		}
	}
	finish_wait(&dev_priv->fence_queue, &__wait);
	if (ret == 0 && fifo_idle) {
		__le32 __iomem *fifo_mem = dev_priv->mmio_virt;
		iowrite32(signal_seq, fifo_mem + SVGA_FIFO_FENCE);
	}
	wake_up_all(&dev_priv->fence_queue);
	if (fifo_idle)
		up_read(&fifo_state->rwsem);

	return ret;
}

static void bluecard_write_wakeup(bluecard_info_t *info)
{
	if (!info) {
		BT_ERR("Unknown device");
		return;
	}

	if (!test_bit(XMIT_SENDING_READY, &(info->tx_state)))
		return;

	if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
		set_bit(XMIT_WAKEUP, &(info->tx_state));
		return;
	}

	do {
		register unsigned int iobase = info->p_dev->resource[0]->start;
		register unsigned int offset;
		register unsigned char command;
		register unsigned long ready_bit;
		register struct sk_buff *skb;
		register int len;

		clear_bit(XMIT_WAKEUP, &(info->tx_state));

		if (!pcmcia_dev_present(info->p_dev))
			return;

		if (test_bit(XMIT_BUFFER_NUMBER, &(info->tx_state))) {
			if (!test_bit(XMIT_BUF_TWO_READY, &(info->tx_state)))
				break;
			offset = 0x10;
			command = REG_COMMAND_TX_BUF_TWO;
			ready_bit = XMIT_BUF_TWO_READY;
		} else {
			if (!test_bit(XMIT_BUF_ONE_READY, &(info->tx_state)))
				break;
			offset = 0x00;
			command = REG_COMMAND_TX_BUF_ONE;
			ready_bit = XMIT_BUF_ONE_READY;
		}

		if (!(skb = skb_dequeue(&(info->txq))))
			break;

		if (bt_cb(skb)->pkt_type & 0x80) {
			/* Disable RTS */
			info->ctrl_reg |= REG_CONTROL_RTS;
			outb(info->ctrl_reg, iobase + REG_CONTROL);
		}

		/* Activate LED */
		bluecard_enable_activity_led(info);

		/* Send frame */
		len = bluecard_write(iobase, offset, skb->data, skb->len);

		/* Tell the FPGA to send the data */
		outb_p(command, iobase + REG_COMMAND);

		/* Mark the buffer as dirty */
		clear_bit(ready_bit, &(info->tx_state));

		if (bt_cb(skb)->pkt_type & 0x80) {
			DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
			DEFINE_WAIT(wait);

			unsigned char baud_reg;

			switch (bt_cb(skb)->pkt_type) {
			case PKT_BAUD_RATE_460800:
				baud_reg = REG_CONTROL_BAUD_RATE_460800;
				break;
			case PKT_BAUD_RATE_230400:
				baud_reg = REG_CONTROL_BAUD_RATE_230400;
				break;
			case PKT_BAUD_RATE_115200:
				baud_reg = REG_CONTROL_BAUD_RATE_115200;
				break;
			case PKT_BAUD_RATE_57600:
				/* Fall through... */
			default:
				baud_reg = REG_CONTROL_BAUD_RATE_57600;
				break;
			}

			/* Wait until the command reaches the baseband */
			prepare_to_wait(&wq, &wait, TASK_INTERRUPTIBLE);
			schedule_timeout(HZ/10);
			finish_wait(&wq, &wait);

			/* Set baud on baseband */
			info->ctrl_reg &= ~0x03;
			info->ctrl_reg |= baud_reg;
			outb(info->ctrl_reg, iobase + REG_CONTROL);

			/* Enable RTS */
			info->ctrl_reg &= ~REG_CONTROL_RTS;
			outb(info->ctrl_reg, iobase + REG_CONTROL);

//.........这里部分代码省略.........