/*
 * Copyright (C) 2015, 2016 "IoT.bzh"
 * Author "Romain Forlot" <romain.forlot@iot.bzh>
 *
 * 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.
 */

#pragma once

#include <sys/timeb.h>

/*
 * @brief return epoch in milliseconds
 *
 * @return long long int epoch in milliseconds
 */
typedef long long int (*TimeFunction)();

/**
 * @struct FrequencyClock 
 * @brief A frequency counting clock.
 *
 * @var FrequencyClock::frequency
 *  the clock frequency in Hz.
 * @var FrequencyClock::last_time
 *  the last time (in milliseconds since startup) that the clock
 *	ticked.
 * @var FrequencyClock::time_function
 *  a function returning current time
 */
typedef struct {
		float frequency;
		unsigned long lastTick;
		TimeFunction timeFunction;
} FrequencyClock;