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/*
* Copyright 2013-2019 Software Radio Systems Limited
*
* This file is part of srsLTE.
*
* srsLTE is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* srsLTE is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* A copy of the GNU Affero General Public License can be found in
* the LICENSE file in the top-level directory of this distribution
* and at http://www.gnu.org/licenses/.
*
*/
/******************************************************************************
* File: metrics_hub.h
* Description: Centralizes metrics interfaces to allow different metrics clients
* to get metrics
*****************************************************************************/
#ifndef SRSLTE_METRICS_HUB_H
#define SRSLTE_METRICS_HUB_H
#include <vector>
#include "srslte/common/threads.h"
#include "srslte/srslte.h"
namespace srslte {
template<typename metrics_t>
class metrics_interface
{
public:
virtual bool get_metrics(metrics_t &m) = 0;
};
template<typename metrics_t>
class metrics_listener
{
public:
virtual void set_metrics(metrics_t &m, const uint32_t period_usec) = 0;
virtual void stop() = 0;
};
template<typename metrics_t>
class metrics_hub : public periodic_thread
{
public:
metrics_hub()
:m(NULL)
{
for (int i = 0; i < 3; ++i) {
sleep_period_start[i] = (struct timeval){};
}
}
bool init(metrics_interface<metrics_t> *m_, float report_period_secs_=1.0) {
m = m_;
// Start with user-default priority
start_periodic(report_period_secs_*1e6, -2);
return true;
}
void stop() {
stop_thread();
// stop all listeners
for (uint32_t i=0;i<listeners.size();i++) {
listeners[i]->stop();
}
thread_cancel();
wait_thread_finish();
}
void add_listener(metrics_listener<metrics_t> *listener) {
listeners.push_back(listener);
}
private:
void run_period(){
// get current time and check how long we slept
gettimeofday(&sleep_period_start[2], NULL);
get_time_interval(sleep_period_start);
uint32_t period = sleep_period_start[0].tv_sec*1e6 + sleep_period_start[0].tv_usec;
if (m) {
metrics_t metric;
m->get_metrics(metric);
for (uint32_t i=0;i<listeners.size();i++) {
listeners[i]->set_metrics(metric, period);
}
}
// store start of sleep period
gettimeofday(&sleep_period_start[1], NULL);
}
metrics_interface<metrics_t> *m;
std::vector<metrics_listener<metrics_t>*> listeners;
struct timeval sleep_period_start[3];
};
} // namespace srslte
#endif // SRSLTE_METRICS_HUB_H