Creating a branch for experimenting with some ideas for JMS client.rajith_jms_client

git-svn-id: https://svn.apache.org/repos/asf/qpid/branches/rajith_jms_client@1128369 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 74 insertions, 0 deletions

diff --git a/qpid/cpp/src/qpid/sys/apr/APRBase.h b/qpid/cpp/src/qpid/sys/apr/APRBase.h
new file mode 100644
index 0000000000..7b5644a129
--- /dev/null
+++ b/qpid/cpp/src/qpid/sys/apr/APRBase.h
@@ -0,0 +1,74 @@
+/*
+ *
+ * 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.
+ *
+ */
+#ifndef _APRBase_
+#define _APRBase_
+
+#include <string>
+#include <apr_thread_mutex.h>
+#include <apr_errno.h>
+
+namespace qpid {
+namespace sys {
+
+    /**
+     * Use of APR libraries necessitates explicit init and terminate
+     * calls. Any class using APR libs should obtain the reference to
+     * this singleton and increment on construction, decrement on
+     * destruction. This class can then correctly initialise apr
+     * before the first use and terminate after the last use.
+     */
+    class APRBase{
+	static APRBase* instance;
+	apr_pool_t* pool;
+	apr_thread_mutex_t* mutex;
+	int count;
+
+	APRBase();
+	~APRBase();
+	static APRBase* getInstance();
+	bool _increment();
+	void _decrement();
+    public:
+	static void increment();
+	static void decrement();
+    };
+
+    //this is also a convenient place for a helper function for error checking:
+    void check(apr_status_t status, const char* file, const int line);
+    std::string get_desc(apr_status_t status);
+
+#define CHECK_APR_SUCCESS(A) qpid::sys::check(A, __FILE__, __LINE__); 
+
+}
+}
+
+// Inlined as it is called *a lot*
+void inline qpid::sys::check(apr_status_t status, const char* file, const int line){
+    if (status != APR_SUCCESS){
+        char tmp[256];
+        throw Exception(QPID_MSG(apr_strerror(status, tmp, size)))
+    }
+}
+
+
+
+
+#endif