Eugene,
On Wed, 16 Jul 2003, Eugene LiS User wrote:
> Hello,
>
> The driver I'm porting uses sleep() function calls
> in its ..._open() function.
>
> Q1:
> Is sleep(channel, pri) a legitimate call in the LiS environment?
No, not in Linux. These are SVR4 specific.
>
> Q2:
> What 'include' file should I use in order to get
> PZERO PCATCH constants defined.
Don't exist in Linux. These are SVR4 specific.
>
> Q3:
> What would be the closest LiS/Linux equivalent to the
> sleep_spinunlock(channel, PZERO, mylock_lock)
> function.
Declare a Linux wait queue. Add you process in open() to the
wait queue with add_wait_queue_exclusive(), set current->state =
TASK_INTERRUPTIBLE, release your spinlock, and call schedule().
In your read putp call wake_up_interruptible() with the wait
queue you declared. Your open() routine will exit the
schedule() call. It can then call getq().
Put this in your queue private structure:
typedef struct priv {
.
.
wait_queue_head_t *sleep;
.
.
} priv_t;
In open() do something like:
{
DECLARE_WAITQUEUE(wait, current);
add_wait_queue_exclusive(priv->sleep, &wait);
while (!(mp = getq(RD(q)))) {
lis_spin_unlock(mylock_lock);
set_current_state(TASK_INTERRUPTIBLE);
schedule();
lis_spin_lock(mylock_lock);
}
set_current_state(TASK_RUNNING);
remove_wait_queue(priv->sleep, &wait);
/* here you have mp */
}
In your read putp() do something like.
int read_putp(queue_t *q, mblk_t *mp)
{
priv_t *priv = q->q_ptr;
putq(q, mp);
if (waitqueue_active(priv->sleep))
wake_up_interruptible(priv->sleep);
return (0);
}
--brian
>
> thanks a lot for your comments.
> --
> Eugene
>
>
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--
Brian F. G. Bidulock � The reasonable man adapts himself to the �
[EMAIL PROTECTED] � world; the unreasonable one persists in �
http://www.openss7.org/ � trying to adapt the world to himself. �
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� unreasonable man. -- George Bernard Shaw �
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