Report EMFILE/ENFILE from xs_socket()

This patch propoagates the error from signaler and mailbox
initialisation up the stack.

To achieve this signaler and mailbox classes were re-written
is C-like syntax.

Finally, shutdown_stress test now ignores EMFILE/ENFILE errors.
Thus, the tests should pass even on OSX which sets the max
number of file descriptors pretty low by default.

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

1 files changed, 9 insertions, 4 deletions

diff --git a/tests/shutdown_stress.cpp b/tests/shutdown_stress.cpp
index 27ab1f0..f106cc0 100644
--- a/tests/shutdown_stress.cpp
+++ b/tests/shutdown_stress.cpp
@@ -69,13 +69,18 @@ int XS_TEST_MAIN ()
 
         for (i = 0; i != THREAD_COUNT; i++) {
             s2 = xs_socket (ctx, XS_SUB);
-            assert (s2);
-            threads [i] = thread_create (shutdown_stress_worker, s2);
-            assert (threads [i]);
+            if (!s2 && (errno == EMFILE || errno == ENFILE))
+                threads [i] = NULL;
+            else {
+                assert (s2);
+                threads [i] = thread_create (shutdown_stress_worker, s2);
+                assert (threads [i]);
+            }
         }
 
         for (i = 0; i != THREAD_COUNT; i++)
-            thread_join (threads [i]);
+            if (threads [i])
+                thread_join (threads [i]);
 
         rc = xs_close (s1);
         assert (rc == 0);