Subject: Re: Using libSSH2 in fiber-based parallel system

Re: Using libSSH2 in fiber-based parallel system

From: Alexander Lamaison <>
Date: Tue, 14 Oct 2014 22:18:54 +0100

On 13 October 2014 11:55, Martin DraĆĄar <> wrote:
> I have a program that uses fibers as a mean for parallelism and would
> like to use libssh2 in it. However, some of these functions seem more
> apt for thread-based parallelism. I have in mind functions using e.g.
> the BLOCK_ADJUST macros.
> So I just want to ask you, if the following approach I want to use is
> the correct one. Instead of calling libssh2_session_handshake I have
> this cycle that is basically BLOCK_ADJUST sans keepalive:
> while (socket not read or written to)
> {
> session_startup(session, socket);
> yield(); // Pass execution to another fiber
> }
> I ask, because the session_startup function is not exported into public API.

Using libssh2 in non-blocking mode you bypass BLOCK_ADJUST altogether.
Maybe something like this?

int rc;
while((rc = libssh2_session_startup(session, socket)) != LIBSSH2_ERROR_EAGAIN)


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Received on 2014-10-14