ICU-13300 Added thread safety note to TimeZone::detectHostTimeZone().

X-SVN-Rev: 41421

diff --git a/icu4c/source/i18n/unicode/timezone.h b/icu4c/source/i18n/unicode/timezone.h
index 83dee317784a819962d4118f6bf39fafdee28082..064703e1587397aa8c11314884dbb2d93b39e2e9 100644 (file)
--- a/icu4c/source/i18n/unicode/timezone.h
+++ b/icu4c/source/i18n/unicode/timezone.h
@@ -284,6 +284,8 @@ public:
      * and may return a different TimeZone from the one returned by
      * TimeZone::createDefault().
      *
+     * <p>This function is not thread safe.</p>
+     *
      * @return  A new instance of TimeZone detected from the current host system
      *          configuration.
      * @stable ICU 55