1 files changed, 90 insertions, 0 deletions
diff --git a/Final/cpp/lib/common/sys/apr/APRBase.cpp b/Final/cpp/lib/common/sys/apr/APRBase.cpp
new file mode 100644
index 0000000000..861071499f
--- /dev/null
+++ b/Final/cpp/lib/common/sys/apr/APRBase.cpp
@@ -0,0 +1,90 @@
+/*
+ *
+ * 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 <iostream>
+#include <QpidError.h>
+#include "APRBase.h"
+
+using namespace qpid::sys;
+
+APRBase* APRBase::instance = 0;
+
+APRBase* APRBase::getInstance(){
+    if(instance == 0){
+	instance = new APRBase();
+    }
+    return instance;
+}
+
+
+APRBase::APRBase() : count(0){
+    apr_initialize();
+    CHECK_APR_SUCCESS(apr_pool_create(&pool, 0));
+    CHECK_APR_SUCCESS(apr_thread_mutex_create(&mutex, APR_THREAD_MUTEX_NESTED, pool));
+}
+
+APRBase::~APRBase(){
+    CHECK_APR_SUCCESS(apr_thread_mutex_destroy(mutex));
+    apr_pool_destroy(pool);
+    apr_terminate();  
+}
+
+bool APRBase::_increment(){
+    bool deleted(false);
+    CHECK_APR_SUCCESS(apr_thread_mutex_lock(mutex));
+    if(this == instance){
+	count++;
+    }else{
+	deleted = true;
+    }
+    CHECK_APR_SUCCESS(apr_thread_mutex_unlock(mutex));
+    return !deleted;
+}
+
+void APRBase::_decrement(){
+    APRBase* copy = 0;
+    CHECK_APR_SUCCESS(apr_thread_mutex_lock(mutex));
+    if(--count == 0){
+	copy = instance;
+	instance = 0;
+    }
+    CHECK_APR_SUCCESS(apr_thread_mutex_unlock(mutex));
+    if(copy != 0){
+	delete copy;
+    }
+}
+
+void APRBase::increment(){
+    int count = 0;
+    while(count++ < 2 && !getInstance()->_increment()){
+        std::cout << "WARNING: APR initialization triggered concurrently with termination." << std::endl;
+    }
+}
+
+void APRBase::decrement(){
+    getInstance()->_decrement();
+}
+
+std::string qpid::sys::get_desc(apr_status_t status){
+    const int size = 50;
+    char tmp[size];
+    return std::string(apr_strerror(status, tmp, size));
+}
+