mirror of https://gitee.com/bigwinds/arangodb
61 lines
2.1 KiB
C++
61 lines
2.1 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2018 ArangoDB GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Andrey Abramov
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/// @author Vasiliy Nabatchikov
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////////////////////////////////////////////////////////////////////////////////
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#include <mutex>
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#include "velocypack/StringRef.h"
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#include "LogicalDataSource.h"
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namespace arangodb {
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/*static*/ LogicalDataSource::Type const& LogicalDataSource::Type::emplace(
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arangodb::velocypack::StringRef const& name
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) {
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struct Less {
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bool operator()(
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arangodb::velocypack::StringRef const& lhs,
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arangodb::velocypack::StringRef const& rhs
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) const noexcept {
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return lhs.compare(rhs) < 0;
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}
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};
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static std::mutex mutex;
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static std::map<arangodb::velocypack::StringRef, LogicalDataSource::Type, Less> types;
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std::lock_guard<std::mutex> lock(mutex);
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auto itr = types.emplace(name, Type());
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if (itr.second) {
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const_cast<std::string&>(itr.first->second._name) = name.toString(); // update '_name'
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const_cast<arangodb::velocypack::StringRef&>(itr.first->first) =
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itr.first->second.name(); // point key at value stored in '_name'
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}
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return itr.first->second;
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}
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} // arangodb
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// -----------------------------------------------------------------------------
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// --SECTION-- END-OF-FILE
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// -----------------------------------------------------------------------------
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