42 lines
1.4 KiB
C++
42 lines
1.4 KiB
C++
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#pragma once
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#include <mutex>
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#include <QDateTime>
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namespace Bloom
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{
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/**
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* Some (maybe all) QDateTime static functions are not thread-safe and thus can result in data races.
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* This trivial helper class wraps some of these functions and employs a mutex to prevent data races.
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*/
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class DateTime
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{
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private:
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static inline std::mutex currentDateTimeMutex;
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public:
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/**
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* The QDateTime::currentDateTime() static function is not thread-safe. This may be caused by the
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* underlying interfacing with the system clock.
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*
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* @return
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*/
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static QDateTime currentDateTime() {
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auto lock = std::unique_lock(DateTime::currentDateTimeMutex);
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return QDateTime::currentDateTime();
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}
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/**
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* The QDateTime::timeZoneAbbreviation() is a non-static member function but it may still interface with the
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* system clock. This can result in race conditions when called simultaneously to QDateTime::currentDateTime(),
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* and so any calls to it must require possession of the mutex.
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*
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* @param dateTime
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* @return
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*/
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static QString getTimeZoneAbbreviation(const QDateTime& dateTime) {
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auto lock = std::unique_lock(DateTime::currentDateTimeMutex);
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return dateTime.timeZoneAbbreviation();
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}
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};
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}
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