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timer.c
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timer.c
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/*
* Copyright 2010-2015 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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.
*/
/**
* @file timer.c
* @brief Linux implementation of the timer interface.
*/
#include <stddef.h>
#include <sys/types.h>
#include "timer_linux.h"
char expired(Timer* timer) {
struct timeval now, res;
gettimeofday(&now, NULL);
timersub(&timer->end_time, &now, &res);
return res.tv_sec < 0 || (res.tv_sec == 0 && res.tv_usec <= 0);
}
void countdown_ms(Timer* timer, unsigned int timeout) {
struct timeval now;
gettimeofday(&now, NULL);
struct timeval interval = { timeout / 1000, (timeout % 1000) * 1000 };
timeradd(&now, &interval, &timer->end_time);
}
void countdown(Timer* timer, unsigned int timeout) {
struct timeval now;
gettimeofday(&now, NULL);
struct timeval interval = { timeout, 0 };
timeradd(&now, &interval, &timer->end_time);
}
int left_ms(Timer* timer) {
struct timeval now, res;
gettimeofday(&now, NULL);
timersub(&timer->end_time, &now, &res);
return (res.tv_sec < 0) ? 0 : res.tv_sec * 1000 + res.tv_usec / 1000;
}
void InitTimer(Timer* timer) {
timer->end_time = (struct timeval ) { 0, 0 };
}