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

1 files changed, 73 insertions, 0 deletions

diff --git a/cpp/src/qpid/sys/Waitable.h b/cpp/src/qpid/sys/Waitable.h
new file mode 100644
index 0000000000..eb71a1d742
--- /dev/null
+++ b/cpp/src/qpid/sys/Waitable.h
@@ -0,0 +1,73 @@
+#ifndef QPID_SYS_WAITABLE_H
+#define QPID_SYS_WAITABLE_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 "Monitor.h"
+
+#include <assert.h>
+
+namespace qpid {
+namespace sys {
+
+/**
+ * A monitor that keeps track of waiting threads.
+ * Threads that use a WaitLock are counted as waiters, threads that
+ * use a normal ScopedLock are not considered waiters.
+ */
+class Waitable : public Monitor {
+  public:
+    Waitable() : waiters(0) {}
+
+    /** Use this inside a scoped lock around the
+     * call to Monitor::wait to be counted as a waiter
+     */
+    struct ScopedWait {
+        Waitable& w;
+        ScopedWait(Waitable& w_) : w(w_) { ++w.waiters; }
+        ~ScopedWait() { --w.waiters; w.notifyAll(); }
+    };
+
+    /** Block till all waiters have finished waiting.
+     * The calling thread does not count as a waiter.
+     *@pre Must be called inside a ScopedLock but NOT a ScopedWait.
+     */
+    bool waitAll(Duration timeout=TIME_INFINITE) {
+        AbsTime deadline(now(), timeout);
+        while (waiters > 0) {
+            if (!wait(deadline)) {
+                assert(timeout != TIME_INFINITE);
+                return false;
+            }
+        }
+        return true;
+    }
+
+  private:
+  friend struct ScopedWait;
+    size_t waiters;
+};
+
+}} // namespace qpid::sys
+
+
+
+#endif  /*!QPID_SYS_WAITABLE_H*/