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ntdll: Use a pthread mutex for the timezone section. 

Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Alexandre Julliard 2020-07-13 18:44:02 +02:00
parent 992bdd77a0
commit 99520e1997
1 changed files with 4 additions and 12 deletions
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16
dlls/ntdll/unix/system.c
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@ -1876,17 +1876,9 @@ static time_t find_dst_change(unsigned long min, unsigned long max, int *is_dst)
return min;
}
static RTL_CRITICAL_SECTION TIME_tz_section;
static RTL_CRITICAL_SECTION_DEBUG critsect_debug =
{
0, 0, &TIME_tz_section,
{ &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": TIME_tz_section") }
};
static RTL_CRITICAL_SECTION TIME_tz_section = { &critsect_debug, -1, 0, 0, 0, 0 };
static void get_timezone_info( RTL_DYNAMIC_TIME_ZONE_INFORMATION *tzi )
{
static pthread_mutex_t tz_mutex = PTHREAD_MUTEX_INITIALIZER;
static RTL_DYNAMIC_TIME_ZONE_INFORMATION cached_tzi;
static int current_year = -1, current_bias = 65535;
struct tm *tm;
@ -1894,7 +1886,7 @@ static void get_timezone_info( RTL_DYNAMIC_TIME_ZONE_INFORMATION *tzi )
time_t year_start, year_end, tmp, dlt = 0, std = 0;
int is_dst, bias;
RtlEnterCriticalSection( &TIME_tz_section );
pthread_mutex_lock( &tz_mutex );
year_start = time(NULL);
tm = gmtime(&year_start);
@ -1904,7 +1896,7 @@ static void get_timezone_info( RTL_DYNAMIC_TIME_ZONE_INFORMATION *tzi )
if (current_year == tm->tm_year && current_bias == bias)
{
*tzi = cached_tzi;
RtlLeaveCriticalSection( &TIME_tz_section );
pthread_mutex_unlock( &tz_mutex );
return;
}
@ -1997,7 +1989,7 @@ static void get_timezone_info( RTL_DYNAMIC_TIME_ZONE_INFORMATION *tzi )
find_reg_tz_info(tzi, tz_name, current_year + 1900);
cached_tzi = *tzi;
RtlLeaveCriticalSection( &TIME_tz_section );
pthread_mutex_unlock( &tz_mutex );
}