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41 lines
972 B
C++
41 lines
972 B
C++
#include <common/DateLUT.h>
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#include <Poco/Exception.h>
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#pragma GCC diagnostic push
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#ifdef __APPLE__
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#pragma GCC diagnostic ignored "-Wold-style-cast"
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#endif
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#include <unicode/timezone.h>
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#include <unicode/unistr.h>
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#pragma GCC diagnostic pop
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DateLUT::DateLUT()
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{
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/// Initialize the pointer to the default DateLUTImpl.
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std::unique_ptr<icu::TimeZone> tz(icu::TimeZone::createDefault());
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if (tz == nullptr)
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throw Poco::Exception("Failed to determine the host time zone.");
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icu::UnicodeString u_out;
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tz->getID(u_out);
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std::string default_time_zone;
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u_out.toUTF8String(default_time_zone);
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default_impl.store(&getImplementation(default_time_zone), std::memory_order_release);
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}
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const DateLUTImpl & DateLUT::getImplementation(const std::string & time_zone) const
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{
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std::lock_guard<std::mutex> lock(mutex);
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auto it = impls.emplace(time_zone, nullptr).first;
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if (!it->second)
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it->second = std::make_unique<DateLUTImpl>(time_zone);
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return *it->second;
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}
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