SearchCancellation.h

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// Copyright (c) 2009-2014 Alan Wright. All rights reserved.
// Distributable under the terms of either the Apache License (Version 2.0)
// or the GNU Lesser General Public License.
//
// Extended by UnionTech Software Technology Co., Ltd. (2024)
// Added search cancellation support for responsive user interactions
 
#ifndef SEARCHCANCELLATION_H
#define SEARCHCANCELLATION_H
 
#include "LuceneTypes.h"
#include <atomic>
 
namespace Lucene {
 
class LPPAPI SearchCancellation {
public:
    static void setFlag(std::atomic<bool>* flag);
 
    static std::atomic<bool>* getFlag();
 
    static void clear();
 
    static bool shouldCancel();
};
 
class LPPAPI SearchCancellationGuard {
public:
    explicit SearchCancellationGuard(std::atomic<bool>* flag);
    ~SearchCancellationGuard();
 
    // Non-copyable and non-movable
    SearchCancellationGuard(const SearchCancellationGuard&) = delete;
    SearchCancellationGuard& operator=(const SearchCancellationGuard&) = delete;
    SearchCancellationGuard(SearchCancellationGuard&&) = delete;
    SearchCancellationGuard& operator=(SearchCancellationGuard&&) = delete;
};
 
}
 
#endif // SEARCHCANCELLATION_H