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/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* Timer module */
#include <stdint.h>
#include <stdio.h>
#include <time.h>
#include "task.h"
#include "timer.h"
static timestamp_t boot_time;
void usleep(unsigned us)
{
task_wait_event(us);
}
timestamp_t _get_time(void)
{
struct timespec ts;
timestamp_t ret;
clock_gettime(CLOCK_MONOTONIC, &ts);
ret.val = 1000000 * (uint64_t)ts.tv_sec + ts.tv_nsec / 1000;
return ret;
}
timestamp_t get_time(void)
{
timestamp_t ret = _get_time();
ret.val -= boot_time.val;
return ret;
}
void udelay(unsigned us)
{
timestamp_t deadline = get_time();
deadline.val += us;
while (get_time().val < deadline.val)
;
}
int timestamp_expired(timestamp_t deadline, const timestamp_t *now)
{
timestamp_t now_val;
if (!now) {
now_val = get_time();
now = &now_val;
}
return ((int64_t)(now->val - deadline.val) >= 0);
}
void timer_init(void)
{
boot_time = _get_time();
}
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