mirror of https://github.com/PentHertz/srsLTE.git
116 lines
2.7 KiB
C++
116 lines
2.7 KiB
C++
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2021 Software Radio Systems Limited
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*
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* By using this file, you agree to the terms and conditions set
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* forth in the LICENSE file which can be found at the top level of
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* the distribution.
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*
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*/
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/******************************************************************************
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* File: timeout.h
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* Description: Millisecond resolution timeouts. Uses a dedicated thread to
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* call an optional callback function upon timeout expiry.
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* Reference:
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*****************************************************************************/
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#ifndef SRSRAN_TIMEOUT_H
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#define SRSRAN_TIMEOUT_H
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#include "srsran/phy/utils/debug.h"
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#include <pthread.h>
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#include <stdint.h>
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#include <sys/time.h>
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#include <unistd.h>
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namespace srsran {
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class timeout_callback
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{
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public:
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virtual void timeout_expired(uint32_t timeout_id) = 0;
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};
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class timeout
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{
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public:
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timeout() : running(false), callback(NULL), thread(0), timeout_id(0) {}
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~timeout()
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{
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if (running && callback)
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pthread_join(thread, NULL);
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}
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void start(int duration_msec_, uint32_t timeout_id_ = 0, timeout_callback* callback_ = NULL)
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{
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if (duration_msec_ < 0)
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return;
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reset();
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gettimeofday(&start_time[1], NULL);
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duration_msec = duration_msec_;
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running = true;
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timeout_id = timeout_id_;
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callback = callback_;
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if (callback)
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pthread_create(&thread, NULL, &thread_start, this);
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}
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void reset()
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{
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if (callback)
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pthread_cancel(thread);
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running = false;
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}
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static void* thread_start(void* t_)
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{
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timeout* t = (timeout*)t_;
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t->thread_func();
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return NULL;
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}
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void thread_func()
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{
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// substract time elapsed until now from timer duration
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gettimeofday(&start_time[2], NULL);
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get_time_interval(start_time);
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int32_t usec = duration_msec * 1000 - start_time[0].tv_usec;
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if (usec > 0)
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usleep(usec);
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if (callback && running)
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callback->timeout_expired(timeout_id);
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}
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bool expired()
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{
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if (running) {
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gettimeofday(&start_time[2], NULL);
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get_time_interval(start_time);
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return start_time[0].tv_usec > duration_msec * 1000;
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} else {
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return false;
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}
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}
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int32_t get_msec_to_expire()
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{
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if (running) {
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gettimeofday(&start_time[2], NULL);
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get_time_interval(start_time);
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return (duration_msec * 1000 - start_time[0].tv_usec) / 1000;
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}
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return 0;
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}
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bool is_running() { return running; }
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private:
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struct timeval start_time[3];
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pthread_t thread;
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uint32_t timeout_id;
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timeout_callback* callback;
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bool running;
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int duration_msec;
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};
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} // namespace srsran
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#endif // SRSRAN_TIMEOUT_H
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