time_t wtimegm (struct tm *tm)
{
time_t ret;
char *tz;
tz = environment_getVariable("TZ");
environment_setVariable("TZ", "");
tzset();
ret = mktime(tm);
if (tz)
environment_setVariable("TZ", tz);
else
environment_deleteVariable("TZ");
tzset();
return ret;
}
time_t wtimegm (struct tm *tm)
{
time_t ret;
char *tz;
/* Used since the timezone setting needs to be atomic */
wthread_static_mutex_lock(&envLock);
tz = environment_getVariable("TZ");
environment_setVariable("TZ", "UTC");
tzset();
ret = mktime(tm);
if (tz)
environment_setVariable("TZ", tz);
else
environment_deleteVariable("TZ");
tzset();
wthread_static_mutex_unlock(&envLock);
return ret;
}
mama_status
mamaTimeZone_check (mamaTimeZone timeZone)
{
if (!timeZone)
{
return MAMA_STATUS_INVALID_ARG;
}
else
{
mamaTimeZoneImpl* impl = (mamaTimeZoneImpl*)timeZone;
const char* tzSaved = NULL;
time_t tzClock;
time_t gmClock;
struct tm tzTm;
/* get the mutex for the accessing thread stops other threads
* from calling this method at the same time as the TZ update
* thread. */
wthread_static_mutex_lock (&sCheck_mutex);
/* Save the current value of TZ: */
tzSaved = environment_getVariable("TZ");
if (tzSaved && tzSaved[0])
{
tzSaved = strdup(tzSaved);
}
/* Switch TZ to the mTz zone: */
if (impl->mTz[0])
{
environment_setVariable("TZ", impl->mTz);
}
else
{
environment_deleteVariable("TZ");
}
tzset();
/* Get the mTz time: */
time (&tzClock);
localtime_r (&tzClock, &tzTm);
/* Switch TZ to the UTC: */
environment_setVariable("TZ", "UTC");
tzset();
/* Get the GMT time: */
gmClock = mktime(&tzTm);
/* Restore original TZ */
if (tzSaved && tzSaved[0])
{
environment_setVariable("TZ", tzSaved);
free ((void*)tzSaved);
}
else
{
environment_deleteVariable("TZ");
}
tzset();
impl->mOffset = difftime (gmClock, tzClock);
/* release the mutex on this method */
wthread_static_mutex_unlock (&sCheck_mutex);
return MAMA_STATUS_OK;
}
}
