Re: l4-hackers Digest, Vol 76, Issue 13

Hi,

the open_component and close_component function do get as first parameter the sender of the invocation (see Chapter 2.3 in the Dice manual http://www.inf.tu-dresden.de/content/institutes/sya/os/forschung/projekte/di...).

To get the thread ID of the server to which you want to send the open_call or close_call, you need some name service. See http://www.inf.tu-dresden.de/index.php?node_id=1314&ln=en and http://www.inf.tu-dresden.de/index.php?node_id=1315&ln=en.

Cheers, Ron.

fang zhengshu wrote:

hi all,

could someone tell me how to get the thread id when do the open_call()/close_call()? or we can get the thread id unless wo do the l4_ipc_send() operation?

I only want to get the thread id who do the open_call()/close_call() operation? When more than one task do the operation The server can store the thread id.

thank you and best wishes.

On Sun, Aug 30, 2009 at 6:00 PM, <l4-hackers-request@os.inf.tu-dresden.de mailto:l4-hackers-request@os.inf.tu-dresden.de> wrote:

Send l4-hackers mailing list submissions to
       l4-hackers@os.inf.tu-dresden.de
<mailto:l4-hackers@os.inf.tu-dresden.de>

To subscribe or unsubscribe via the World Wide Web, visit
       http://os.inf.tu-dresden.de/mailman/listinfo/l4-hackers
or, via email, send a message with subject or body 'help' to
       l4-hackers-request@os.inf.tu-dresden.de
<mailto:l4-hackers-request@os.inf.tu-dresden.de>

You can reach the person managing the list at
       l4-hackers-owner@os.inf.tu-dresden.de
<mailto:l4-hackers-owner@os.inf.tu-dresden.de>

When replying, please edit your Subject line so it is more specific
than "Re: Contents of l4-hackers digest..."


Today's Topics:

  1. Re: can server side get the thread id of client side?
     (fang zhengshu)


----------------------------------------------------------------------

Message: 1
Date: Sun, 30 Aug 2009 02:57:16 -0400
From: fang zhengshu <fangzhsh07@gmail.com <mailto:fangzhsh07@gmail.com>>
To: l4-hackers@os.inf.tu-dresden.de
<mailto:l4-hackers@os.inf.tu-dresden.de>
Subject: Re: can server side get the thread id of client side?
Message-ID:
       <a73d246f0908292357w7ddaed5cwdb2a3013b07020c5@mail.gmail.com
<mailto:a73d246f0908292357w7ddaed5cwdb2a3013b07020c5@mail.gmail.com>>
Content-Type: text/plain; charset="iso-8859-1"

hi all,

 3. Re: can server side get the thread id of client side?
>      (Bj?rn D?bel)
> Message: 3
> Date: Fri, 28 Aug 2009 09:40:17 +0200
> From: Bj?rn D?bel <doebel@os.inf.tu-dresden.de
<mailto:doebel@os.inf.tu-dresden.de>>
> To: L4 Hackers <l4-hackers@os.inf.tu-dresden.de
<mailto:l4-hackers@os.inf.tu-dresden.de>>
> Subject: Re: can server side get the thread id of client side?
> Message-ID: <4A9789E1.7080503@os.inf.tu-dresden.de
<mailto:4A9789E1.7080503@os.inf.tu-dresden.de>>
> Content-Type: text/plain; charset=ISO-8859-1
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Hi,
>
> > I know that the client side can get the server's thread_id throw
name
> > service. I want to ask can the server side get the client's
task_id or
> > thread_id?
> > or must the client side send the thread_id to server?
>
> your server will call either l4_ipc_wait() or
l4_ipc_reply_and_wait() in
> order to receive the message from the client. In both cases there is a
> src parameter which will contain the client's thread ID after the
system
> call returns.
>
sorry for not explaining it clearly.
if I defined two functions in idl file, just like:
interface test{
int open(int fd, int flags);
int close(fd);
};

 and I implement them in the server side.
I know that when I use open()/close() in the client side, the server
will
call the function open_component()/close_component() which are in
the server
side.

In the open_component()/close_component() function I want to get
thread id
of the caller to do some operation flag.but as we know, when we call
open()/close() in client side, the open_component()/close_component()
function in server side will be executed. so we can not use
l4_ipc_wait() or
l4_ipc_reply_and_wait() function in the
open_component()/close_component()
function, or it will be stop and wait for a message in the function.
So in
order to get the thread id in the
open_component()/close_component(), when
or where should I use the l4_ipc_wait() or l4_ipc_reply and wait()
 to get
the thread id?

thank you!





--
fang,