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/*
*
* 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/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();
}
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));
}
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