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* localtime.c: Lessen lock overhead for gmtime etc.

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(gmtcheck): Lock only if !gmt_is_set.
(gmtime_r, offtime, timeoff): Do not lock; gmtcheck now does this.
This commit is contained in:
Paul Eggert
2014-08-22 18:18:03 -07:00
parent b3c8309836
commit b5296f12c9
1 changed files with 3 additions and 19 deletions
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22
localtime.c
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@ -1244,12 +1244,15 @@ gmtcheck(void)
{
if (gmt_is_set)
return;
if (lock() != 0)
return;
#ifdef ALL_STATE
gmtptr = malloc(sizeof *gmtptr);
#endif
if (gmtptr)
gmtload(gmtptr);
gmt_is_set = true;
unlock();
}
/*
@ -1403,14 +1406,8 @@ gmtime(const time_t *const timep)
struct tm *
gmtime_r(const time_t *const timep, struct tm *tmp)
{
int err = lock();
if (err) {
errno = err;
return NULL;
}
gmtcheck();
tmp = gmtsub(timep, 0, tmp);
unlock();
return tmp;
}
@ -1420,14 +1417,8 @@ struct tm *
offtime(const time_t *const timep, const long offset)
{
struct tm *tmp;
int err = lock();
if (err) {
errno = err;
return NULL;
}
gmtcheck();
tmp = gmtsub(timep, offset, &tm);
unlock();
return tmp;
}
@ -1995,17 +1986,10 @@ time_t
timeoff(struct tm *const tmp, const long offset)
{
time_t t;
int err;
if (tmp)
tmp->tm_isdst = 0;
err = lock();
if (err) {
errno = err;
return -1;
}
gmtcheck();
t = time1(tmp, gmtsub, offset);
unlock();
return t;
}