afb81b8278
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39 lines
754 B
C++
39 lines
754 B
C++
// This file is part of Desktop App Toolkit,
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// a set of libraries for developing nice desktop applications.
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//
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// For license and copyright information please follow this link:
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// https://github.com/desktop-app/legal/blob/master/LEGAL
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//
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#pragma once
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#include "base/basic_types.h"
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#include <QtCore/QFile>
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namespace base {
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class FileLock {
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public:
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FileLock();
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bool lock(QFile &file, QIODevice::OpenMode mode);
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[[nodiscard]] bool locked() const;
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void unlock();
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static constexpr auto kSkipBytes = size_type(4);
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~FileLock();
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private:
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class Lock;
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struct Descriptor;
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struct LockingPid;
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static constexpr auto kLockOffset = index_type(0);
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static constexpr auto kLockLimit = kSkipBytes;
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std::unique_ptr<Lock> _lock;
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};
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} // namespace base
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