Posix EventChannel implementation using epoll. Placeholder for kevents.

Dynamic thread pool EventChannelThreads to serve EventChannel.
Misc cleanup/enhancements.


git-svn-id: https://svn.apache.org/repos/asf/incubator/qpid/trunk/qpid@480582 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 60 insertions, 0 deletions

diff --git a/cpp/src/qpid/ExceptionHolder.h b/cpp/src/qpid/ExceptionHolder.h
new file mode 100644
index 0000000000..c2deca803e
--- /dev/null
+++ b/cpp/src/qpid/ExceptionHolder.h
@@ -0,0 +1,60 @@
+#ifndef _qpid_ExceptionHolder_h
+#define _qpid_ExceptionHolder_h
+
+/*
+ *
+ * Copyright (c) 2006 The Apache Software Foundation
+ *
+ * Licensed 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/Exception.h>
+#include <boost/shared_ptr.hpp>
+
+namespace qpid {
+
+/**
+ * Holder for a heap-allocated exc eption that can be stack allocated
+ * and thrown safely.
+ *
+ * Basically this is a shared_ptr with the Exception functions added
+ * so the catcher need not be aware that it is a pointer rather than a
+ * reference.
+ * 
+ * shared_ptr is chosen over auto_ptr because it has normal 
+ * copy semantics. 
+ */
+class ExceptionHolder : public Exception, public boost::shared_ptr<Exception>
+{
+  public:
+    typedef boost::shared_ptr<Exception> shared_ptr;
+
+    ExceptionHolder() throw() {}
+    ExceptionHolder(Exception* p) throw() : shared_ptr(p) {}
+    ExceptionHolder(shared_ptr p) throw() : shared_ptr(p) {}
+
+    ExceptionHolder(const Exception& e) throw() : shared_ptr(e.clone()) {}
+    ExceptionHolder(const std::exception& e);
+
+    const char* what() const throw() { return (*this)->what(); }
+    std::string toString() const throw() { return (*this)->toString(); }
+    virtual Exception* clone() const throw() { return (*this)->clone(); }
+    virtual void throwSelf() const { (*this)->throwSelf(); }
+};
+
+} // namespace qpid
+
+
+
+#endif  /*!_qpid_ExceptionHolder_h*/