NO-JIRA: create branch for qpid-cpp 0.34 RC process

git-svn-id: https://svn.apache.org/repos/asf/qpid/branches/qpid-cpp-0.34-rc@1687469 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 77 insertions, 0 deletions

diff --git a/qpid/cpp/src/qpid/sys/Shlib.h b/qpid/cpp/src/qpid/sys/Shlib.h
new file mode 100644
index 0000000000..2ce5a49fcb
--- /dev/null
+++ b/qpid/cpp/src/qpid/sys/Shlib.h
@@ -0,0 +1,77 @@
+#ifndef QPID_SYS_SHLIB_H
+#define QPID_SYS_SHLIB_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/CommonImportExport.h" 
+#include "qpid/sys/IntegerTypes.h" 
+#include <boost/noncopyable.hpp>
+#include <iostream>
+
+namespace qpid {
+namespace sys {
+
+/** Encapsulates a shared library handle.
+ *@see AutoShlib
+ */
+class Shlib {
+  public:
+    /** Load a shared library */
+    Shlib(const char* libname) { load(libname); }
+
+    /** Load a shared library */
+    Shlib(const std::string& libname) { load(libname.c_str()); }
+
+    /** Unload shared library. */
+    QPID_COMMON_EXTERN void unload();
+
+    /** Look up symbol. */
+    QPID_COMMON_EXTERN void* getSymbol(const char* symbol);
+
+    /** Look up symbol in shared library, cast it to the desired
+     * pointer type, void* by default.
+     */
+    template <class T>
+    T getSymbol(const char* symbol) {
+        // Double cast avoids warning about casting object to function pointer
+        return reinterpret_cast<T>(reinterpret_cast<intptr_t>(
+                                       this->getSymbol(symbol)));
+    }
+    
+  private:
+    void* handle;
+    QPID_COMMON_EXTERN void load(const char* libname);
+};
+
+/** A shared library handle that unloads the shlib in it's dtor */
+class AutoShlib : public Shlib {
+  public:
+    /** Load shared library */
+    AutoShlib(const std::string& libname) : Shlib(libname) {}
+    /** Calls unload() */
+    QPID_COMMON_EXTERN ~AutoShlib() throw();
+};
+
+    
+}} // namespace qpid::sys
+
+#endif  /*!QPID_SYS_SHLIB_H*/