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/**
* Copyright (C) 2015 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include <cstring>
#include <iosfwd>
#include <string>
#include "mongo/base/disallow_copying.h"
#include "mongo/base/string_data.h"
namespace mongo {
/**
* this is a thread safe string
* you will never get a bad pointer, though data may be mungedd
*/
class ThreadSafeString {
MONGO_DISALLOW_COPYING(ThreadSafeString);
public:
ThreadSafeString(size_t size = 256) : _size(size), _buf(new char[size]) {
memset(_buf, '\0', _size);
}
~ThreadSafeString() {
delete[] _buf;
}
std::string toString() const {
return _buf;
}
ThreadSafeString& operator=(StringData str) {
size_t s = str.size();
if (s >= _size - 2)
s = _size - 2;
strncpy(_buf, str.rawData(), s);
_buf[s] = '\0';
return *this;
}
bool empty() const {
return _buf[0] == '\0';
}
private:
const size_t _size;
char* const _buf;
};
std::ostream& operator<<(std::ostream& s, const ThreadSafeString& o);
} // namespace mongo
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