diff options
Diffstat (limited to 'qpid/cpp/src/qpid/sys/apr/APRBase.cpp')
-rw-r--r-- | qpid/cpp/src/qpid/sys/apr/APRBase.cpp | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/sys/apr/APRBase.cpp b/qpid/cpp/src/qpid/sys/apr/APRBase.cpp new file mode 100644 index 0000000000..8bdba66bdc --- /dev/null +++ b/qpid/cpp/src/qpid/sys/apr/APRBase.cpp @@ -0,0 +1,89 @@ +/* + * + * 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 "qpid/log/Statement.h" +#include "qpid/sys/apr/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()) + QPID_LOG(warning, "APR initialization triggered concurrently with termination."); +} + +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)); +} + |