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ntpshm: Pass upcoming leap second. 

Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
master
Miroslav Lichvar 2014-06-20 16:32:49 +02:00 committed by Richard Cochran
parent 2aa6b10c3b
commit bc84b88053
1 changed files with 26 additions and 1 deletions
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27
ntpshm.c
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@ -28,6 +28,11 @@
#define NS_PER_SEC 1000000000
/* NTP leap values */
#define LEAP_NORMAL 0x0
#define LEAP_INSERT 0x1
#define LEAP_DELETE 0x2
/* Key of the first SHM segment */
#define SHMKEY 0x4e545030
@ -61,6 +66,7 @@ struct shmTime {
struct ntpshm_servo {
struct servo servo;
struct shmTime *shm;
int leap;
};
static void ntpshm_destroy(struct servo *servo)
@ -91,7 +97,18 @@ static double ntpshm_sample(struct servo *servo,
s->shm->receiveTimeStampNSec = local_ts % NS_PER_SEC;
s->shm->receiveTimeStampUSec = s->shm->receiveTimeStampNSec / 1000;
s->shm->precision = -30; /* 1 nanosecond */
s->shm->leap = 0;
switch (s->leap) {
case -1:
s->shm->leap = LEAP_DELETE;
break;
case 1:
s->shm->leap = LEAP_INSERT;
break;
default:
s->shm->leap = LEAP_NORMAL;
}
/* TODO: write memory barrier */
s->shm->count++;
@ -109,6 +126,13 @@ static void ntpshm_reset(struct servo *servo)
{
}
static void ntpshm_leap(struct servo *servo, int leap)
{
struct ntpshm_servo *s = container_of(servo, struct ntpshm_servo, servo);
s->leap = leap;
}
struct servo *ntpshm_servo_create(void)
{
struct ntpshm_servo *s;
@ -122,6 +146,7 @@ struct servo *ntpshm_servo_create(void)
s->servo.sample = ntpshm_sample;
s->servo.sync_interval = ntpshm_sync_interval;
s->servo.reset = ntpshm_reset;
s->servo.leap = ntpshm_leap;
shmid = shmget(SHMKEY + ntpshm_segment, sizeof (struct shmTime),
IPC_CREAT | 0600);