Intermediate checkin with preliminary work on epoll based net IO

git-svn-id: https://svn.apache.org/repos/asf/incubator/qpid/trunk/qpid@548337 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 93 insertions, 0 deletions

diff --git a/cpp/src/qpid/sys/Poller.h b/cpp/src/qpid/sys/Poller.h
new file mode 100644
index 0000000000..6fedd669a0
--- /dev/null
+++ b/cpp/src/qpid/sys/Poller.h
@@ -0,0 +1,93 @@
+#ifndef _sys_Poller_h
+#define _sys_Poller_h
+
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+
+#include "Time.h"
+
+#include <stdint.h>
+
+#include <boost/shared_ptr.hpp>
+
+namespace qpid {
+namespace sys {
+
+/**
+ * Handle class to use for polling
+ */
+class Poller;
+class PollerHandlePrivate;
+class PollerHandle {
+    friend class Poller;
+
+    PollerHandlePrivate* impl;
+    const int fd;
+
+public:
+    PollerHandle(int fd0);
+    virtual ~PollerHandle();
+
+    int getFD() const { return fd; }
+};
+
+/**
+ * Poller: abstract class to encapsulate a file descriptor poll to be used
+ * by a reactor
+ */
+class PollerPrivate;
+class Poller {
+    PollerPrivate* impl;
+
+public:
+    typedef boost::shared_ptr<Poller> shared_ptr;
+
+    enum Direction {
+        NONE,
+        IN,
+        OUT,
+        INOUT,
+        SHUTDOWN
+    };
+
+    struct Event {
+        PollerHandle* handle;
+        Direction dir;
+        
+        Event(PollerHandle* handle0, Direction dir0) :
+          handle(handle0),
+          dir(dir0) {
+        }
+    };
+    
+    Poller();
+    ~Poller();
+    void shutdown();
+
+    void addFd(PollerHandle& handle, Direction dir);
+    void delFd(PollerHandle& handle);
+    void modFd(PollerHandle& handle, Direction dir);
+    void rearmFd(PollerHandle& handle);
+    Event wait(Duration timeout = TIME_INFINITE);
+};
+
+}}
+#endif // _sys_Poller_h