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C++

/**
*
* \section COPYRIGHT
*
* Copyright 2013-2020 Software Radio Systems Limited
*
* By using this file, you agree to the terms and conditions set
* forth in the LICENSE file which can be found at the top level of
* the distribution.
*
*/
#ifndef SRSLOG_EVENT_TRACE_H
#define SRSLOG_EVENT_TRACE_H
#include <chrono>
#include <string>
namespace srslog {
class log_channel;
/// The event tracing framework allows to trace any kind of event inside an
/// application.
/// To enable event tracing the ENABLE_SRSLOG_EVENT_TRACE macro symbol should
/// be defined, otherwise calls to the tracing framework will be ignored. This
/// is important to avoid the overhead of tracing when it is not required.
/// For details about each event trace type please refer to:
/// https://docs.google.com/document/d/1CvAClvFfyA5R-PhYUmn5OOQtYMH4h6I0nSsKchNAySU/edit
/// Initializes the event trace framework saving the trace events to a
/// "event_trace.log" file.
void event_trace_init();
/// Initializes the event trace framework using the specified log channel to log
/// all trace events.
void event_trace_init(log_channel& c);
#ifdef ENABLE_SRSLOG_EVENT_TRACE
/// Generates the begin phase of a duration event.
void trace_duration_begin(const std::string& category, const std::string& name);
/// Generates the end phase of a duration event.
void trace_duration_end(const std::string& category, const std::string& name);
/// Generates a complete event.
#define trace_complete_event(C, N) \
auto scoped_complete_event_variable = srslog::detail::scoped_complete_event(C, N)
#else
/// No-ops.
#define trace_duration_begin(C, N)
#define trace_duration_end(C, N)
#define trace_complete_event(C, N)
#endif
namespace detail {
/// Scoped type object for implementing a complete event.
class scoped_complete_event
{
public:
scoped_complete_event(std::string cat, std::string n) :
category(std::move(cat)),
name(std::move(n)),
start(std::chrono::steady_clock::now())
{}
~scoped_complete_event();
private:
const std::string category;
const std::string name;
std::chrono::time_point<std::chrono::steady_clock> start;
};
} // namespace detail
} // namespace srslog
#endif // SRSLOG_EVENT_TRACE_H