1 files changed, 96 insertions, 0 deletions
diff --git a/cpp/src/qpid/sys/APRBase.cpp b/cpp/src/qpid/sys/APRBase.cpp
new file mode 100644
index 0000000000..91e2b9f428
--- /dev/null
+++ b/cpp/src/qpid/sys/APRBase.cpp
@@ -0,0 +1,96 @@
+/*
+ *
+ * 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 <iostream>
+#include "qpid/sys/APRBase.h"
+#include "qpid/QpidError.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();
+}
+
+void qpid::sys::check(apr_status_t status, const std::string& file, const int line){
+    if (status != APR_SUCCESS){
+        const int size = 50;
+        char tmp[size];
+        std::string msg(apr_strerror(status, tmp, size));
+        throw QpidError(APR_ERROR + ((int) status), msg, file, line);
+    }
+}
+
+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));
+}
+