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cd8f19328a
- Minor adjustments to header includes, whitespace, and a compiler warning fix during merge * origin/topic/neverlord/gh-1408: Add new Timer class to the telemetry API Fix build with latest VectorVal API Update baselines Prefix telemetry BIFs with __ Expose telemetry API to scripting land Add handle types for histogram metrics Move duplicated code to detail header Adhere to Zeek coding style Apply suggestions from code review Add telemetry Manager to Zeek setup / teardown Add missing whitespaces for Zeek coding style Add gauge metric types Add scaffold for new metrics API with counters
57 lines
1.2 KiB
C++
57 lines
1.2 KiB
C++
// See the file "COPYING" in the main distribution directory for copyright.
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#pragma once
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#include <chrono>
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#include "zeek/telemetry/Histogram.h"
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namespace zeek::telemetry {
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/// Convenience helper for measuring durations such as latency using a histogram
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/// with second resolution. The measurement starts when creating the objects and
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/// finishes when the Timer goes out of scope.
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class [[nodiscard]] Timer {
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public:
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using Clock = std::chrono::steady_clock;
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explicit Timer(DblHistogram h) : h_(h)
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{
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start_ = Clock::now();
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}
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Timer(const Timer&) = delete;
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Timer&operator=(const Timer&) = delete;
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~Timer()
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{
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Observe(h_, start_);
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}
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/// @return The histogram handle.
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auto Handle() const noexcept
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{
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return h_;
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}
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/// @return The recorded start time.
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auto Started() const noexcept
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{
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return start_;
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}
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/// Calls `h.Observe` with the time passed since `start`.
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static void Observe(DblHistogram h, Clock::time_point start)
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{
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using DblSec = std::chrono::duration<double>;
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if ( auto end = Clock::now(); end > start )
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h.Observe(std::chrono::duration_cast<DblSec>(end - start).count());
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}
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private:
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DblHistogram h_;
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Clock::time_point start_;
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};
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} // namespace zeek::telemetry
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