52 lines
2.3 KiB
C#
52 lines
2.3 KiB
C#
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using System.Globalization;
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using System.Threading;
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namespace Umbraco.Core
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{
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static class ThreadExtensions
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{
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public static void SanitizeThreadCulture(this Thread thread)
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{
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// get the current culture
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var currentCulture = CultureInfo.CurrentCulture;
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// at the top of any culture should be the invariant culture - find it
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// doing an .Equals comparison ensure that we *will* find it and not loop
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// endlessly
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var invariantCulture = currentCulture;
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while (invariantCulture.Equals(CultureInfo.InvariantCulture) == false)
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invariantCulture = invariantCulture.Parent;
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// now that invariant culture should be the same object as CultureInfo.InvariantCulture
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// yet for some reasons, sometimes it is not - and this breaks anything that loops on
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// culture.Parent until a reference equality to CultureInfo.InvariantCulture. See, for
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// example, the following code in PerformanceCounterLib.IsCustomCategory:
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//
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// CultureInfo culture = CultureInfo.CurrentCulture;
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// while (culture != CultureInfo.InvariantCulture)
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// {
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// library = GetPerformanceCounterLib(machine, culture);
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// if (library.IsCustomCategory(category))
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// return true;
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// culture = culture.Parent;
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// }
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//
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// The reference comparisons never succeeds, hence the loop never ends, and the
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// application hangs.
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//
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// granted, that comparison should probably be a .Equals comparison, but who knows
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// how many times the framework assumes that it can do a reference comparison? So,
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// better fix the cultures.
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if (ReferenceEquals(invariantCulture, CultureInfo.InvariantCulture))
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return;
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// if we do not have equality, fix cultures by replacing them with a culture with
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// the same name, but obtained here and now, with a proper invariant top culture
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thread.CurrentCulture = CultureInfo.GetCultureInfo(thread.CurrentCulture.Name);
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thread.CurrentUICulture = CultureInfo.GetCultureInfo(thread.CurrentUICulture.Name);
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}
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}
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}
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