From f61e1ef7589da893b9b54448224dc0961515eb40 Mon Sep 17 00:00:00 2001
From: Alan Conway <aconway@apache.org>
Date: Fri, 26 Oct 2007 19:48:31 +0000
Subject: Session resume support in client & broker: Client can resume a
 session after voluntary suspend() or network failure. Frames lost in network
 failure are automatically re-transmitted for transparent re-connection.

client::Session improvements:
 - Locking to avoid races between network & user threads.
 - Replaced client::StateManager with sys::StateMonitor - avoid heap allocation.

qpid::Exception clean up:
 - use QPID_MSG consistently to format exception messages.
 - throw typed exceptions (in reply_exceptions.h) for AMQP exceptions.
 - re-throw correct typed exception on client for exceptions from broker.
 - Removed QpidError.h

rubygen/templates/constants.rb:
 - constants.h: Added FOO_CLASS_ID and FOO_BAR_METHOD_ID constants.
 - reply_constants.h: Added throwReplyException(code, text)

log::Logger:
 - Fixed shutdown race in Statement::~Initializer()


git-svn-id: https://svn.apache.org/repos/asf/incubator/qpid/trunk/qpid@588761 13f79535-47bb-0310-9956-ffa450edef68
---
 cpp/src/qpid/sys/StateMonitor.h | 78 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 cpp/src/qpid/sys/StateMonitor.h

(limited to 'cpp/src/qpid/sys/StateMonitor.h')

diff --git a/cpp/src/qpid/sys/StateMonitor.h b/cpp/src/qpid/sys/StateMonitor.h
new file mode 100644
index 0000000000..5a92756f3a
--- /dev/null
+++ b/cpp/src/qpid/sys/StateMonitor.h
@@ -0,0 +1,78 @@
+#ifndef QPID_SYS_STATEMONITOR_H
+#define QPID_SYS_STATEMONITOR_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 "qpid/sys/Waitable.h"
+
+#include <bitset>
+
+namespace qpid {
+namespace sys {
+
+/**
+ * A monitor with an enum state value.
+ *
+ *@param Enum: enum type to use for states.
+ *@param EnumMax: Highest enum value.
+ */
+template <class Enum, size_t MaxEnum>
+class StateMonitor : public Waitable
+{
+  public:
+    struct Set : public std::bitset<MaxEnum + 1> {
+        Set() {}
+        Set(Enum s) { set(s); }
+        Set(Enum s, Enum t) { set(s).set(t); }
+        Set(Enum s, Enum t, Enum u) { set(s).set(t).set(u); }
+        Set(Enum s, Enum t, Enum u, Enum v) { set(s).set(t).set(u).set(v); }
+    };
+
+
+    StateMonitor(Enum initial) { state=initial; }
+
+    /** @pre Caller holds a ScopedLock. */
+    void set(Enum s) { state=s; notifyAll(); }
+    /** @pre Caller holds a ScopedLock. */
+    StateMonitor& operator=(Enum s) { set(s); return *this; }
+
+    /** @pre Caller holds a ScopedLock. */
+    Enum get() const { return state; }
+    /** @pre Caller holds a ScopedLock. */
+    operator Enum() const { return state; }
+
+    /** @pre Caller holds a ScopedLock */
+    void waitFor(Enum s) { ScopedWait(*this); while (s != state) wait(); }
+    /** @pre Caller holds a ScopedLock */
+    void waitFor(Set s) { ScopedWait(*this); while (!s.test(state)) wait(); }
+    /** @pre Caller holds a ScopedLock */
+    void waitNot(Enum s) { ScopedWait(*this); while (s == state) wait(); }
+    /** @pre Caller holds a ScopedLock */
+    void waitNot(Set s) { ScopedWait(*this); while (s.test(state)) wait(); }
+    
+  private:
+    Enum state;
+};
+
+}}
+
+
+#endif  /*!QPID_SYS_STATEMONITOR_H*/
-- 
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