Add device support & testing. Bus semantic fix.

This adds nn_device and nng_device.  There were some internal changes
required to fix shutdown / close issues.  Note that we shut down the
sockets when exiting from device -- this is required to make both threads
see the failure and bail, since we are not using a single event loop.

I also noticed that the bus protocol had a bug where it would send
messages back to the originator.  This was specifically tested for in
the compat_device test, and we have fixed it.

1 files changed, 19 insertions, 0 deletions

diff --git a/src/core/device.h b/src/core/device.h
new file mode 100644
index 00000000..973a4cb7
--- /dev/null
+++ b/src/core/device.h
@@ -0,0 +1,19 @@
+//
+// Copyright 2017 Garrett D'Amore <garrett@damore.org>
+//
+// This software is supplied under the terms of the MIT License, a
+// copy of which should be located in the distribution where this
+// file was obtained (LICENSE.txt).  A copy of the license may also be
+// found online at https://opensource.org/licenses/MIT.
+//
+
+#ifndef CORE_DEVICE_H
+#define CORE_DEVICE_H
+
+// Device takes messages from one side, and forwards them to the other.
+// It works in both directions.  Arguably we should build versions of this
+// that are unidirectional, and we could extend this API with user-defined
+// filtering functions.
+extern int nni_device(nni_sock *, nni_sock *);
+
+#endif // CORE_DEVICE_H