/*
 *
 * 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.
 *
 */
#ifndef _APRBase_
#define _APRBase_

#include <string>
#include "apr_thread_mutex.h"
#include "apr_errno.h"

namespace qpid {
namespace concurrent {

    /**
     * Use of APR libraries necessitates explicit init and terminate
     * calls. Any class using APR libs should obtain the reference to
     * this singleton and increment on construction, decrement on
     * destruction. This class can then correctly initialise apr
     * before the first use and terminate after the last use.
     */
    class APRBase{
	static APRBase* instance;
	apr_pool_t* pool;
	apr_thread_mutex_t* mutex;
	int count;

	APRBase();
	~APRBase();
	static APRBase* getInstance();
	bool _increment();
	void _decrement();
    public:
	static void increment();
	static void decrement();
    };

    //this is also a convenient place for a helper function for error checking:
    void check(apr_status_t status, const std::string& file, const int line);
    std::string get_desc(apr_status_t status);

#define CHECK_APR_SUCCESS(A) check(A, __FILE__, __LINE__); 

}
}




#endif