void
lwmsg_session_generate_cookie(
LWMsgSessionCookie* cookie
)
{
mt m;
uint32_t seed[3];
uint32_t s;
int i;
LWMsgTime now;
lwmsg_time_now(&now);
/* Add in 32 bits of data from the address of the cookie */
seed[0] = (uint32_t) (size_t) cookie;
/* Add in 32 bits of data from the current pid */
seed[1] = (uint32_t) getpid();
/* Add in 32 bits of data from the current time */
seed[2] = (uint32_t) now.microseconds;
mt_init_by_array(&m, seed, sizeof(seed) / sizeof(*seed));
for (i = 0; i < sizeof(cookie->bytes); i += sizeof(s))
{
s = mt_genrand_int32(&m);
memcpy(cookie->bytes + i, &s, sizeof(s));
}
}
static
LWMsgStatus
lwmsg_clock_update(
LWMsgClock* clock
)
{
LWMsgTime now, diff;
LWMsgStatus status = LWMSG_STATUS_SUCCESS;
BAIL_ON_ERROR(status = lwmsg_time_now(&now));
if (clock->last_time.seconds == 0 &&
clock->last_time.microseconds == 0)
{
clock->adjust.seconds = -now.seconds;
clock->adjust.microseconds = -now.microseconds;
}
else if (lwmsg_time_compare(&now, &clock->last_time) <= LWMSG_TIME_EQUAL)
{
lwmsg_time_difference(&now, &clock->last_time, &diff);
diff.microseconds++;
lwmsg_time_sum(&clock->adjust, &diff, &clock->adjust);
}
clock->last_time = now;
error:
return status;
}