1 files changed, 84 insertions, 0 deletions
diff --git a/src/mailbox.cpp b/src/mailbox.cpp
new file mode 100644
index 0000000..d1fd065
--- /dev/null
+++ b/src/mailbox.cpp
@@ -0,0 +1,84 @@
+/*
+    Copyright (c) 2007-2013 Contributors as noted in the AUTHORS file
+
+    This file is part of 0MQ.
+
+    0MQ is free software; you can redistribute it and/or modify it under
+    the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    0MQ is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "mailbox.hpp"
+#include "err.hpp"
+
+zmq::mailbox_t::mailbox_t ()
+{
+    //  Get the pipe into passive state. That way, if the users starts by
+    //  polling on the associated file descriptor it will get woken up when
+    //  new command is posted.
+    bool ok = cpipe.read (NULL);
+    zmq_assert (!ok);
+    active = false;
+}
+
+zmq::mailbox_t::~mailbox_t ()
+{
+    //  TODO: Retrieve and deallocate commands inside the cpipe.
+
+    // Work around problem that other threads might still be in our
+    // send() method, by waiting on the mutex before disappearing.
+    sync.lock ();
+    sync.unlock ();
+}
+
+zmq::fd_t zmq::mailbox_t::get_fd ()
+{
+    return signaler.get_fd ();
+}
+
+void zmq::mailbox_t::send (const command_t &cmd_)
+{
+    sync.lock ();
+    cpipe.write (cmd_, false);
+    bool ok = cpipe.flush ();
+    sync.unlock ();
+    if (!ok)
+        signaler.send ();
+}
+
+int zmq::mailbox_t::recv (command_t *cmd_, int timeout_)
+{
+    //  Try to get the command straight away.
+    if (active) {
+        bool ok = cpipe.read (cmd_);
+        if (ok)
+            return 0;
+
+        //  If there are no more commands available, switch into passive state.
+        active = false;
+        signaler.recv ();
+    }
+
+    //  Wait for signal from the command sender.
+    int rc = signaler.wait (timeout_);
+    if (rc != 0 && (errno == EAGAIN || errno == EINTR))
+        return -1;
+
+    //  We've got the signal. Now we can switch into active state.
+    active = true;
+
+    //  Get a command.
+    errno_assert (rc == 0);
+    bool ok = cpipe.read (cmd_);
+    zmq_assert (ok);
+    return 0;
+}