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86 lines
3.0 KiB
Diff
86 lines
3.0 KiB
Diff
# Adds threadsafe recreateDefault() method to ICU::Timezone.
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diff --git a/intl/icu/source/i18n/timezone.cpp b/intl/icu/source/i18n/timezone.cpp
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--- a/intl/icu/source/i18n/timezone.cpp
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+++ b/intl/icu/source/i18n/timezone.cpp
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@@ -108,16 +108,19 @@ static const UChar WORLD[] = {0x
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static const UChar GMT_ID[] = {0x47, 0x4D, 0x54, 0x00}; /* "GMT" */
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static const UChar UNKNOWN_ZONE_ID[] = {0x45, 0x74, 0x63, 0x2F, 0x55, 0x6E, 0x6B, 0x6E, 0x6F, 0x77, 0x6E, 0x00}; /* "Etc/Unknown" */
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static const int32_t GMT_ID_LENGTH = 3;
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static const int32_t UNKNOWN_ZONE_ID_LENGTH = 11;
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static icu::TimeZone* DEFAULT_ZONE = NULL;
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static icu::UInitOnce gDefaultZoneInitOnce = U_INITONCE_INITIALIZER;
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+// Prevents DEFAULT_ZONE from being deleted while another thread is cloning it.
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+static UMutex gDefaultZoneMutex = U_MUTEX_INITIALIZER;
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+
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static icu::TimeZone* _GMT = NULL;
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static icu::TimeZone* _UNKNOWN_ZONE = NULL;
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static icu::UInitOnce gStaticZonesInitOnce = U_INITONCE_INITIALIZER;
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static char TZDATA_VERSION[16];
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static icu::UInitOnce gTZDataVersionInitOnce = U_INITONCE_INITIALIZER;
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static int32_t* MAP_SYSTEM_ZONES = NULL;
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@@ -554,26 +557,36 @@ static void U_CALLCONV initDefault()
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}
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// -------------------------------------
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TimeZone* U_EXPORT2
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TimeZone::createDefault()
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{
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umtx_initOnce(gDefaultZoneInitOnce, initDefault);
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+
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+ Mutex mutex_lock(&gDefaultZoneMutex);
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return (DEFAULT_ZONE != NULL) ? DEFAULT_ZONE->clone() : NULL;
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}
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+void
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+TimeZone::recreateDefault()
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+{
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+ TimeZone *default_zone = TimeZone::detectHostTimeZone();
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+ adoptDefault(default_zone);
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+}
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+
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// -------------------------------------
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void U_EXPORT2
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TimeZone::adoptDefault(TimeZone* zone)
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{
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if (zone != NULL)
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{
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+ Mutex mutex_lock(&gDefaultZoneMutex);
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TimeZone *old = DEFAULT_ZONE;
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DEFAULT_ZONE = zone;
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delete old;
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ucln_i18n_registerCleanup(UCLN_I18N_TIMEZONE, timeZone_cleanup);
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}
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}
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// -------------------------------------
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diff --git a/intl/icu/source/i18n/unicode/timezone.h b/intl/icu/source/i18n/unicode/timezone.h
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--- a/intl/icu/source/i18n/unicode/timezone.h
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+++ b/intl/icu/source/i18n/unicode/timezone.h
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@@ -299,16 +299,19 @@ public:
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* and made the default.
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*
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* @return A default TimeZone. Clients are responsible for deleting the time zone
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* object returned.
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* @stable ICU 2.0
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*/
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static TimeZone* U_EXPORT2 createDefault(void);
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+#define ICU_TZ_HAS_RECREATE_DEFAULT
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+ static void U_EXPORT2 recreateDefault();
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+
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/**
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* Sets the default time zone (i.e., what's returned by createDefault()) to be the
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* specified time zone. If NULL is specified for the time zone, the default time
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* zone is set to the default host time zone. This call adopts the TimeZone object
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* passed in; the client is no longer responsible for deleting it.
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*
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* <p>This function is not thread safe. It is an error for multiple threads
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* to concurrently attempt to set the default time zone, or for any thread
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