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- // 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 <stdint.h>
- #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_
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