// Copyright 2017 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef BASE_METRICS_RECORD_HISTOGRAM_CHECKER_H_ #define BASE_METRICS_RECORD_HISTOGRAM_CHECKER_H_ #include #include "base/base_export.h" namespace base { // RecordHistogramChecker provides an interface for checking whether // the given histogram should be recorded. class BASE_EXPORT RecordHistogramChecker { public: virtual ~RecordHistogramChecker() = default; // Returns true iff the given histogram should be recorded. // This method may be called on any thread, so it should not mutate any state. // |histogram_hash| corresponds to the result of HashMetricNameAs32Bits(). virtual bool ShouldRecord(uint32_t histogram_hash) const = 0; }; } // namespace base #endif // BASE_METRICS_RECORD_HISTOGRAM_CHECKER_H_