mirror of
https://github.com/JakubMelka/PDF4QT.git
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57 lines
2.1 KiB
C++
57 lines
2.1 KiB
C++
// MIT License
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//
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// Copyright (c) 2018-2025 Jakub Melka and Contributors
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#ifndef PDFOPERATIONCONTROL_H
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#define PDFOPERATIONCONTROL_H
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#include "pdfglobal.h"
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namespace pdf
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{
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/// Operation controller. This interface can be used for
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/// long operation interruption - so operation is cancelled
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/// immediately.
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class PDFOperationControl
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{
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public:
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constexpr PDFOperationControl() = default;
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virtual ~PDFOperationControl() = default;
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/// Returns true, if operation is cancelled and
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/// processed data should be abandoned. It is safe
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/// to call this function in another thread, implementators
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/// of this interface must ensure thread safety.
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/// If this function returns true, it must return true until
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/// all operations are stopped and correctly handled.
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virtual bool isOperationCancelled() const = 0;
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static inline bool isOperationCancelled(const PDFOperationControl* operationControl)
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{
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return operationControl && operationControl->isOperationCancelled();
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}
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};
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}
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#endif // PDFOPERATIONCONTROL_H
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