From ed188cb4dbe90d3ebb4f7f251e04b5e8d2d3c143 Mon Sep 17 00:00:00 2001
From: Tuncer Ayaz <tuncer.ayaz@gmail.com>
Date: Sat, 23 Jan 2010 00:16:26 +0100
Subject: Remove mutex lock around sys_gettimeofday() in os:timestamp/0
In the erlang-questions thread "os:timestamp() uses mutex lock"
Jonas Falkevik questioned the need for a mutex lock in
os:timestamp/0. The mutex lock *is* needed in erlang:now()
to guarantee the uniqueness of the returned time, but serves
no useful purpose in os:timestamp().
Signed-off-by: Tuncer Ayaz <tuncer.ayaz@gmail.com>
---
erts/emulator/beam/erl_time_sup.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/erts/emulator/beam/erl_time_sup.c b/erts/emulator/beam/erl_time_sup.c
index 76bfdecd9f..28bbcc15ce 100644
--- a/erts/emulator/beam/erl_time_sup.c
+++ b/erts/emulator/beam/erl_time_sup.c
@@ -754,12 +754,8 @@ get_sys_now(Uint* megasec, Uint* sec, Uint* microsec)
{
SysTimeval now;
- erts_smp_mtx_lock(&erts_timeofday_mtx);
-
sys_gettimeofday(&now);
- erts_smp_mtx_unlock(&erts_timeofday_mtx);
-
*megasec = (Uint) (now.tv_sec / 1000000);
*sec = (Uint) (now.tv_sec % 1000000);
*microsec = (Uint) (now.tv_usec);
--
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