Imported Upstream version 2.1.3upstream/2.1.3

1 files changed, 99 insertions, 0 deletions

diff --git a/src/poller_base.cpp b/src/poller_base.cpp
new file mode 100644
index 0000000..d5fb985
--- /dev/null
+++ b/src/poller_base.cpp
@@ -0,0 +1,99 @@
+/*
+    Copyright (c) 2007-2011 iMatix Corporation
+    Copyright (c) 2007-2011 Other 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 "poller_base.hpp"
+#include "i_poll_events.hpp"
+#include "err.hpp"
+
+zmq::poller_base_t::poller_base_t ()
+{
+}
+
+zmq::poller_base_t::~poller_base_t ()
+{
+    //  Make sure there is no more load on the shutdown.
+    zmq_assert (get_load () == 0);
+}
+
+int zmq::poller_base_t::get_load ()
+{
+    return load.get ();
+}
+
+void zmq::poller_base_t::adjust_load (int amount_)
+{
+    if (amount_ > 0)
+        load.add (amount_);
+    else if (amount_ < 0)
+        load.sub (-amount_);
+}
+
+void zmq::poller_base_t::add_timer (int timeout_, i_poll_events *sink_, int id_)
+{
+    uint64_t expiration = clock.now_ms () + timeout_;
+    timer_info_t info = {sink_, id_};
+    timers.insert (timers_t::value_type (expiration, info));
+}
+
+void zmq::poller_base_t::cancel_timer (i_poll_events *sink_, int id_)
+{
+    //  Complexity of this operation is O(n). We assume it is rarely used.
+    for (timers_t::iterator it = timers.begin (); it != timers.end (); ++it)
+        if (it->second.sink == sink_ && it->second.id == id_) {
+            timers.erase (it);
+            return;
+        }
+
+    //  Timer not found.
+    zmq_assert (false);
+}
+
+uint64_t zmq::poller_base_t::execute_timers ()
+{
+    //  Fast track.
+    if (timers.empty ())
+        return 0;
+
+    //  Get the current time.
+    uint64_t current = clock.now_ms ();
+
+    //   Execute the timers that are already due.
+    timers_t::iterator it = timers.begin ();
+    while (it != timers.end ()) {
+
+        //  If we have to wait to execute the item, same will be true about
+        //  all the following items (multimap is sorted). Thus we can stop
+        //  checking the subsequent timers and return the time to wait for
+        //  the next timer (at least 1ms).
+        if (it->first > current)
+            return it->first - current;
+
+        //  Trigger the timer.
+        it->second.sink->timer_event (it->second.id);
+
+        //  Remove it from the list of active timers.
+        timers_t::iterator o = it;
+        ++it;
+        timers.erase (o);
+    }
+
+    //  There are no more timers.
+    return 0;
+}