Re: Multithreading question

[Stefano Mtangoo <mwinjilisti@xxxxxxxxx>]

Thanks Tilo.
That makes it plain clear.
Thanks!

On Tue, Apr 2, 2019, 11:40 Tilo Eckert <tilo.eckert@xxxxxxx> wrote:

> Hi Stefano,
>
> you cannot use a single session in multiple threads concurrently. That
> also applies to all channels created for that session. See here:
> http://api.libssh.org/stable/libssh_tutor_threads.html
>
> If you are talking about command execution via
> ssh_channel_request_exec(), you will have to create a channel for each
> command because the channel is closed when the command ends. Channel
> reuse is not possible when running single commands. SFTP channels can be
> reused.
>
> Regards
> Tilo Eckert
>
> Am 30.03.2019 um 10:51 schrieb Stefano Mtangoo:
> > Until now I have been using libssh on the main thread. But It is
> > annoying as it will sometimes freeze the UI. Network woes sometimes
> > makes UI freezing and that isn't nice. So I want to move all operations
> > to another thread. But I have questions that I cannot find answers to:
> > 1. If I store session in Main UI and pass it in every thread (sometimes
> > mutiple threads will be running under same session) do I have to do
> > locking or libssh provides one? The docs on MT seems to indicate that
> > for dynamic linked DLL
> >
> > 2. I plan to create new sftp object per thread with sftp_new(). What is
> > the performance impact compared to psersisting it?
> >
> > 3. I plan to create new channel for each command from same session when
> > sending a command. How much is performance impacted compared to
> > persisting a channel
> >
> > I do simple command for file management via SFTP (CRUD) plus sending
> > some commands to remote SSH server.
> >
> > Thank you.
> >
> > --
> > for me to live is Christ to die is gain
>
>
>