From: Zhiyi Zhang zzhang@codeweavers.com
After 7161dcd, the timezone bias is calculated every time when SystemTimeOfDayInformation is queried. This restores the cache for timezone bias.
Improve HROT framerate from ~100fps to ~500fps.
Signed-off-by: Zhiyi Zhang zzhang@codeweavers.com --- dlls/ntdll/unix/system.c | 26 +++++++++++++++++++------- 1 file changed, 19 insertions(+), 7 deletions(-)
diff --git a/dlls/ntdll/unix/system.c b/dlls/ntdll/unix/system.c index f374fdec131..dc2dbd76f26 100644 --- a/dlls/ntdll/unix/system.c +++ b/dlls/ntdll/unix/system.c @@ -236,6 +236,8 @@ static unsigned int logical_proc_info_len, logical_proc_info_alloc_len; static SYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX *logical_proc_info_ex; static unsigned int logical_proc_info_ex_size, logical_proc_info_ex_alloc_size;
+static pthread_mutex_t timezone_mutex = PTHREAD_MUTEX_INITIALIZER; + /******************************************************************************* * Architecture specific feature detection for CPUs * @@ -2562,17 +2564,27 @@ NTSTATUS WINAPI NtQuerySystemInformation( SYSTEM_INFORMATION_CLASS class,
case SystemTimeOfDayInformation: /* 3 */ { + static time_t last_utc, last_bias; struct tm *tm; - time_t now; + time_t utc; SYSTEM_TIMEOFDAY_INFORMATION sti = {{{ 0 }}};
sti.BootTime.QuadPart = server_start_time; - now = time( NULL ); - tm = gmtime( &now ); - sti.TimeZoneBias.QuadPart = mktime( tm ) - now; - tm = localtime( &now ); - if (tm->tm_isdst) sti.TimeZoneBias.QuadPart -= 3600; - sti.TimeZoneBias.QuadPart *= TICKSPERSEC; + + utc = time( NULL ); + pthread_mutex_lock( &timezone_mutex ); + if (utc != last_utc) + { + last_utc = utc; + tm = gmtime( &utc ); + last_bias = mktime( tm ) - utc; + tm = localtime( &utc ); + if (tm->tm_isdst) last_bias -= 3600; + last_bias *= TICKSPERSEC; + } + sti.TimeZoneBias.QuadPart = last_bias; + pthread_mutex_unlock( &timezone_mutex ); + NtQuerySystemTime( &sti.SystemTime );
if (size <= sizeof(sti))