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kernelbase: Improve Get{, Dynamic}TimeZoneInformation() performance. 

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=49808
Signed-off-by: Akihiro Sagawa <sagawa.aki@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Akihiro Sagawa 2020-09-25 00:07:50 +09:00 committed by Alexandre Julliard
parent d6da10f3fb
commit d5edadf35a
1 changed files with 40 additions and 7 deletions
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47
dlls/kernelbase/locale.c
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@ -4122,6 +4122,20 @@ INT WINAPI DECLSPEC_HOTPATCH GetCalendarInfoEx( const WCHAR *locale, CALID calen
return GetCalendarInfoW( lcid, calendar, type, data, count, value );
}
static CRITICAL_SECTION tzname_section;
static CRITICAL_SECTION_DEBUG tzname_section_debug =
{
0, 0, &locale_section,
{ &tzname_section_debug.ProcessLocksList, &tzname_section_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": tzname_section") }
};
static CRITICAL_SECTION tzname_section = { &tzname_section_debug, -1, 0, 0, 0, 0 };
static struct {
LCID lcid;
WCHAR key_name[128];
WCHAR standard_name[32];
WCHAR daylight_name[32];
} cached_tzname;
/***********************************************************************
* GetDynamicTimeZoneInformation (kernelbase.@)
@ -4134,15 +4148,34 @@ DWORD WINAPI DECLSPEC_HOTPATCH GetDynamicTimeZoneInformation( DYNAMIC_TIME_ZONE_
if (!set_ntstatus( RtlQueryDynamicTimeZoneInformation( (RTL_DYNAMIC_TIME_ZONE_INFORMATION *)info )))
return TIME_ZONE_ID_INVALID;
if (!RegOpenKeyExW( tz_key, info->TimeZoneKeyName, 0, KEY_ALL_ACCESS, &key ))
RtlEnterCriticalSection( &tzname_section );
if (cached_tzname.lcid == GetThreadLocale() &&
!wcscmp( info->TimeZoneKeyName, cached_tzname.key_name ))
{
RegLoadMUIStringW( key, L"MUI_Std", info->StandardName,
sizeof(info->StandardName), NULL, 0, system_dir );
RegLoadMUIStringW( key, L"MUI_Dlt", info->DaylightName,
sizeof(info->DaylightName), NULL, 0, system_dir );
RegCloseKey( key );
wcscpy( info->StandardName, cached_tzname.standard_name );
wcscpy( info->DaylightName, cached_tzname.daylight_name );
RtlLeaveCriticalSection( &tzname_section );
}
else
{
RtlLeaveCriticalSection( &tzname_section );
if (!RegOpenKeyExW( tz_key, info->TimeZoneKeyName, 0, KEY_ALL_ACCESS, &key ))
{
RegLoadMUIStringW( key, L"MUI_Std", info->StandardName,
sizeof(info->StandardName), NULL, 0, system_dir );
RegLoadMUIStringW( key, L"MUI_Dlt", info->DaylightName,
sizeof(info->DaylightName), NULL, 0, system_dir );
RegCloseKey( key );
}
else return TIME_ZONE_ID_INVALID;
RtlEnterCriticalSection( &tzname_section );
cached_tzname.lcid = GetThreadLocale();
wcscpy( cached_tzname.key_name, info->TimeZoneKeyName );
wcscpy( cached_tzname.standard_name, info->StandardName );
wcscpy( cached_tzname.daylight_name, info->DaylightName );
RtlLeaveCriticalSection( &tzname_section );
}
else return TIME_ZONE_ID_INVALID;
NtQuerySystemTime( &now );
return get_timezone_id( (TIME_ZONE_INFORMATION *)info, now, FALSE );