05599927b9
[ Merge from http://go/wvgerrit/71443 ] The assumption that the metrics will always outlive the CdmSession instance appears not to always hold (at least in a non-android multi-threaded solution). The shared_ptr ensures that the metrics are available even in these rare race conditions. BUG: http://b/123321465 Test: CDM unit tests. Also http://go/wvgerrit/71264 parallel tests. Change-Id: Iaa6a8f6c0fdc46a911789759d6e1228d849aa237
35 lines
931 B
C++
35 lines
931 B
C++
#ifndef WVCDM_METRICS_TIMER_METRIC_H_
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#define WVCDM_METRICS_TIMER_METRIC_H_
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#include <chrono>
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namespace wvcdm {
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namespace metrics {
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class TimerMetric {
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public:
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// Constructs a new TimerMetric.
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explicit TimerMetric() : is_started_(false) {}
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// Starts the clock running. If the clock was previously set, this resets it.
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// IsStarted will return true after this call.
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void Start();
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// Returns whether or not the timer has started.
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bool IsStarted() const { return is_started_; }
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// Stops the clock and clears the current value. IsStarted will return false
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// after this call.
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void Clear();
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// Returns the current clock value as milliseconds (AsMs) or microseconds
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// (AsUs).
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double AsMs() const;
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double AsUs() const;
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private:
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std::chrono::steady_clock clock_;
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std::chrono::time_point<std::chrono::steady_clock> start_;
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bool is_started_;
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};
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} // namespace metrics
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} // namespace wvcdm
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#endif
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