2007-07-02 <aconway@redhat.com

         * qpid/sys/Shlib.h, .cpp: Portable shared library abstraction.
          - Shlib: load, unload, getSymbol
          - AutoShlib: unload in destructor.
         * qpid/sys/apr/Shlib.cpp sys/posix/Shlib.cpp: APR/Posix impls

         * qpid/sys/Module.h: Reimplemented Module in terms of AutoShlib.
         * qpid/Plugin.cpp, .h: Removed dlopen - use Shlib instead.

         * qpid/broker/Broker.cpp: Added missing #include "qpid/log/Statement.h"
         * tests/Shlib.cpp, shlibtest.cpp: Unit test


git-svn-id: https://svn.apache.org/repos/asf/incubator/qpid/trunk/qpid@553056 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 60 insertions, 0 deletions

diff --git a/cpp/src/qpid/sys/posix/Shlib.cpp b/cpp/src/qpid/sys/posix/Shlib.cpp
new file mode 100644
index 0000000000..2630337408
--- /dev/null
+++ b/cpp/src/qpid/sys/posix/Shlib.cpp
@@ -0,0 +1,60 @@
+/*
+ * 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/Shlib.h"
+
+#include <qpid/QpidError.h>
+#include <dlfcn.h>
+
+
+namespace qpid {
+namespace sys {
+
+void Shlib::load(const char* name) {
+    dlerror();
+    handle = ::dlopen(name, RTLD_NOW);
+    const char* error = ::dlerror();
+    if (error) {
+        THROW_QPID_ERROR(INTERNAL_ERROR, error);
+    }
+}
+
+void  Shlib::unload() {
+    if (handle) {
+        ::dlerror();
+        ::dlclose(handle);
+        const char* error = ::dlerror();
+        if (error) {
+            THROW_QPID_ERROR(INTERNAL_ERROR, error);
+        }
+        handle = 0;
+    }
+}
+
+void*  Shlib::getSymbol(const char* name) {
+    ::dlerror();
+    void* sym = ::dlsym(handle, name);
+    const char* error = ::dlerror();
+    if (error) 
+        THROW_QPID_ERROR(INTERNAL_ERROR, error);
+    return sym;
+}
+
+}} // namespace qpid::sys