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/*
*
* 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));
}
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