Hi all,
I am trying to understand the following code from _libssh2_wait_socket:
https://github.com/libssh2/libssh2/blob/a88a727c2a1840f979b34f12bcce3d55dcd7ea6e/src/session.c#L598-L607
/* figure out what to wait for */
dir = libssh2_session_block_directions(session);
if(!dir) {
_libssh2_debug(session, LIBSSH2_TRACE_SOCKET,
"Nothing to wait for in wait_socket");
/* To avoid that we hang below just because there's nothing set to
wait for, we timeout on 1 second to also avoid busy-looping
during this condition */
ms_to_next = 1000;
}
Presumably we only arrive at this point if a call has already returned
EAGAIN, so I would expect that libssh2_session_block_directions never
returns 0 here. Are there any normal situations where this could occur
other than a bug in the library? I'm writing an asynchronous wrapper
over libssh2; what is the recommended way to deal with this condition
in a non-blocking context? Should I simply try again in 1 second like
_libssh2_wait_socket does?
Thanks for any help and suggestions.
Best,
Evan
--
Evan Mesterhazy
etm2...@columbia.edu
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