1 files changed, 107 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/sys/Timer.h b/qpid/cpp/src/qpid/sys/Timer.h
new file mode 100644
index 0000000000..98ba39ce38
--- /dev/null
+++ b/qpid/cpp/src/qpid/sys/Timer.h
@@ -0,0 +1,107 @@
+/*
+ *
+ * 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.
+ *
+ */
+#ifndef sys_Timer
+#define sys_Timer
+
+#include "qpid/sys/TimerWarnings.h"
+#include "qpid/sys/Monitor.h"
+#include "qpid/sys/Mutex.h"
+#include "qpid/sys/Thread.h"
+#include "qpid/sys/Runnable.h"
+#include "qpid/RefCounted.h"
+#include "qpid/CommonImportExport.h"
+#include <memory>
+#include <queue>
+
+#include <boost/intrusive_ptr.hpp>
+
+namespace qpid {
+namespace sys {
+
+class Timer;
+
+class TimerTask : public RefCounted {
+  friend class Timer;
+  friend bool operator<(const boost::intrusive_ptr<TimerTask>&,
+                        const boost::intrusive_ptr<TimerTask>&);
+
+    std::string name;
+    AbsTime sortTime;
+    Duration period;
+    AbsTime nextFireTime;
+    Mutex callbackLock;
+    volatile bool cancelled;
+
+    bool readyToFire() const;
+    void fireTask();
+
+  public:
+    QPID_COMMON_EXTERN TimerTask(Duration period, const std::string& name);
+    QPID_COMMON_EXTERN TimerTask(AbsTime fireTime, const std::string& name);
+    QPID_COMMON_EXTERN virtual ~TimerTask();
+
+    QPID_COMMON_EXTERN void setupNextFire();
+    QPID_COMMON_EXTERN void restart();
+    QPID_COMMON_EXTERN void cancel();
+
+    std::string getName() const { return name; }
+
+  protected:
+    // Must be overridden with callback
+    virtual void fire() = 0;
+};
+
+// For the priority_queue order
+bool operator<(const boost::intrusive_ptr<TimerTask>& a,
+               const boost::intrusive_ptr<TimerTask>& b);
+
+class Timer : private Runnable {
+    qpid::sys::Monitor monitor;
+    std::priority_queue<boost::intrusive_ptr<TimerTask> > tasks;
+    qpid::sys::Thread runner;
+    bool active;
+
+    // Runnable interface
+    void run();
+
+  public:
+    QPID_COMMON_EXTERN Timer();
+    QPID_COMMON_EXTERN virtual ~Timer();
+
+    QPID_COMMON_EXTERN virtual void add(boost::intrusive_ptr<TimerTask> task);
+    QPID_COMMON_EXTERN virtual void start();
+    QPID_COMMON_EXTERN virtual void stop();
+
+  protected:
+    QPID_COMMON_EXTERN virtual void fire(boost::intrusive_ptr<TimerTask> task);
+    QPID_COMMON_EXTERN virtual void drop(boost::intrusive_ptr<TimerTask> task);
+    // Allow derived classes to change the late/overran thresholds.
+    Duration late;
+    Duration overran;
+    Duration lateCancel;
+    TimerWarnings warn;
+};
+
+
+}}
+
+
+#endif