some change

Signed-off-by: xushuai <xushvai@gmail.com>
add comment

Signed-off-by: xushuai <xushvai@gmail.com>
implement SetCurTime func

Signed-off-by: xushuai <xushvai@gmail.com>
add WriteInfoLog func

Signed-off-by: xushuai <xushvai@gmail.com>