From ccd469450aaf62e6d0ce41a9738823d19d749a78 Mon Sep 17 00:00:00 2001 From: Doan Tran Cong Danh Date: Thu, 28 Nov 2019 19:25:03 +0700 Subject: [PATCH] date.c: switch to reentrant {gm,local}time_r Originally, git was intended to be single-thread executable. `gmtime(3)' and `localtime(3)' can be used in such codebase for cleaner code. Overtime, we're employing multithread in our code base. Let's phase out `gmtime(3)' and `localtime(3)' in favour of `gmtime_r(3)' and `localtime_r(3)'. Signed-off-by: Doan Tran Cong Danh Signed-off-by: Junio C Hamano --- date.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/date.c b/date.c index 041db7db4e..b0d9a8421d 100644 --- a/date.c +++ b/date.c @@ -64,16 +64,16 @@ static time_t gm_time_t(timestamp_t time, int tz) * thing, which means that tz -0100 is passed in as the integer -100, * even though it means "sixty minutes off" */ -static struct tm *time_to_tm(timestamp_t time, int tz) +static struct tm *time_to_tm(timestamp_t time, int tz, struct tm *tm) { time_t t = gm_time_t(time, tz); - return gmtime(&t); + return gmtime_r(&t, tm); } -static struct tm *time_to_tm_local(timestamp_t time) +static struct tm *time_to_tm_local(timestamp_t time, struct tm *tm) { time_t t = time; - return localtime(&t); + return localtime_r(&t, tm); } /* @@ -283,6 +283,7 @@ static void show_date_normal(struct strbuf *buf, timestamp_t time, struct tm *tm const char *show_date(timestamp_t time, int tz, const struct date_mode *mode) { struct tm *tm; + struct tm tmbuf = { 0 }; struct tm human_tm = { 0 }; int human_tz = -1; static struct strbuf timebuf = STRBUF_INIT; @@ -318,11 +319,11 @@ const char *show_date(timestamp_t time, int tz, const struct date_mode *mode) } if (mode->local) - tm = time_to_tm_local(time); + tm = time_to_tm_local(time, &tmbuf); else - tm = time_to_tm(time, tz); + tm = time_to_tm(time, tz, &tmbuf); if (!tm) { - tm = time_to_tm(0, 0); + tm = time_to_tm(0, 0, &tmbuf); tz = 0; } @@ -959,10 +960,11 @@ void datestamp(struct strbuf *out) { time_t now; int offset; + struct tm tm = { 0 }; time(&now); - offset = tm_to_time_t(localtime(&now)) - now; + offset = tm_to_time_t(localtime_r(&now, &tm)) - now; offset /= 60; date_string(now, offset, out);