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/*
* 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
/*
* @brief return epoch in milliseconds
*
* @return long long int epoch in milliseconds
*/
typedef long long int (*time_function_t)();
long long int system_time_us();
long long int system_time_ms();
long long int system_time_s();
/**
* @class frequency_clock_t
* @brief A frequency counting clock.
*
* @var frequency_clock_t::frequency
* the clock frequency in Hz.
* @var frequency_clock_t::last_time
* the last time (in milliseconds since startup) that the clock
* ticked.
* @var frequency_clock_t::time_function
* a function returning current time
*/
class frequency_clock_t
{
private:
float frequency_;
unsigned long last_tick_;
time_function_t time_function_;
public:
frequency_clock_t();
frequency_clock_t(float frequency);
frequency_clock_t(float frequency, unsigned long last_tick, time_function_t time_function);
float get_frequency() const;
static float frequency_to_period(float frequency);
bool started();
time_function_t get_time_function();
bool elapsed(bool stagger);
void tick();
};
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