Re: libssh thread support

[Aris Adamantiadis <aris@xxxxxxxxxxxx>]

Hi,

I see a typo in the tutorial. You should read "your *can't* use several
channels in a same session at the same time".
So, let C be a channel, you cannot do
thread 1:
 ssh_channel_read(C,...)
thread 2:
 ssh_channel_write(C, ...)

You will have to use your own locking to avoid reads during your writes
and vice-versa.

Kr,

Aris

Le 13/04/11 22:54, Andrew Tappert a écrit :
> 
> I'm considering using libssh in an application I'm developing.  I would
> be using libssh to execute a program on the server, and my application
> would then speak an application-specific binary protocol with that
> program.  In this protocol, the requests and responses are asynchronous,
> so I would have a reader thread that reads "responses" from the ssh
> connection, while the main thread writes "requests" to it.  Is this
> possible with libssh?  Would I need locking so that a read and a write
> don't occur simultaneously?
> 
> In the libssh tutorial, I see the following:
> 
> "At all times, you may use different sessions inside threads, make
> parallel connections, read/write on different sessions and so on. You
> can use a single session in several channels at the same time. This will
> lead to internal state corruption. This limitation is being worked out
> and will maybe disappear later."
> 
> Could you please clarify this statement?  I don't think it is clear what
> it is exactly that will lead to internal state corruption.
> 
> Thanks,
> Andrew
>