/*

 * Copyright (c) 2011, 2013 Nicira, Inc.

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at:

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#include <config.h>

#include "timer.h"

#include "openvswitch/poll-loop.h"

#include "timeval.h"

/* Returns the number of milliseconds until 'timer' expires. */

long long int

timer_msecs_until_expired(const struct timer *timer)

{

    switch (timer->t) {

    case LLONG_MAX: return LLONG_MAX;

    case LLONG_MIN: return 0;

    default: return timer->t - time_msec();

    }

}

/* Causes poll_block() to wake when 'timer' expires.

 *

 * ('where' is used in debug logging.  Commonly one would use timer_wait() to

 * automatically provide the caller's source file and line number for

 * 'where'.) */

void

timer_wait_at(const struct timer *timer, const char *where)

{

    if (timer->t < LLONG_MAX) {

        poll_timer_wait_until_at(timer->t, where);

    }

}