libcruft-util/stringid.cpp

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/*
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* 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
*
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* http://www.apache.org/licenses/LICENSE-2.0
*
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* 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.
*
* Copyright 2014 Danny Robson <danny@nerdcruft.net>
*/
#include "stringid.hpp"
#include "raii.hpp"
#include <stdexcept>
#include <mutex>
using util::stringid;
//-----------------------------------------------------------------------------
stringid::id_t
stringid::add (const std::string key) {
auto pos = m_map.find (key);
if (pos != m_map.end ())
throw std::invalid_argument ("duplicate stringid key");
static std::mutex s_lock;
std::lock_guard<std::mutex> guard (s_lock);
id_t id = m_map.size ();
m_map[key] = id;
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return id;
}
//-----------------------------------------------------------------------------
stringid::id_t
stringid::find (const std::string &key) const {
auto pos = m_map.find (key);
if (pos == m_map.end ())
throw std::out_of_range ("invalid stringid key");
return pos->second;
}
//-----------------------------------------------------------------------------
void
stringid::clear (void) {
m_map.clear ();
}