diff options
| -rw-r--r-- | generic/tclClock.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/generic/tclClock.c b/generic/tclClock.c index 3ec94fb..32ba145 100644 --- a/generic/tclClock.c +++ b/generic/tclClock.c @@ -1994,22 +1994,23 @@ ClockSecondsObjCmd( static void TzsetIfNecessary(void) { - static char* tzWas = NULL; /* Previous value of TZ, protected by + static char* tzWas = INT2PTR(-1); /* Previous value of TZ, protected by * clockMutex. */ const char* tzIsNow; /* Current value of TZ */ Tcl_MutexLock(&clockMutex); tzIsNow = getenv("TZ"); - if (tzIsNow != NULL && (tzWas == NULL || strcmp(tzIsNow, tzWas) != 0)) { + if (tzIsNow != NULL && (tzWas == NULL || tzWas == INT2PTR(-1) + || strcmp(tzIsNow, tzWas) != 0)) { tzset(); - if (tzWas != NULL) { + if (tzWas != NULL && tzWas != INT2PTR(-1)) { ckfree(tzWas); } tzWas = ckalloc(strlen(tzIsNow) + 1); strcpy(tzWas, tzIsNow); } else if (tzIsNow == NULL && tzWas != NULL) { tzset(); - ckfree(tzWas); + if (tzWas != INT2PTR(-1)) ckfree(tzWas); tzWas = NULL; } Tcl_MutexUnlock(&clockMutex); |