1 // Copyright 2017 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef BASE_METRICS_RECORD_HISTOGRAM_CHECKER_H_ 6 #define BASE_METRICS_RECORD_HISTOGRAM_CHECKER_H_ 7 8 #include <stdint.h> 9 10 #include "base/base_export.h" 11 12 namespace base { 13 14 // RecordHistogramChecker provides an interface for checking whether 15 // the given histogram should be recorded. 16 class BASE_EXPORT RecordHistogramChecker { 17 public: 18 virtual ~RecordHistogramChecker() = default; 19 20 // Returns true iff the given histogram should be recorded. 21 // This method may be called on any thread, so it should not mutate any state. 22 virtual bool ShouldRecord(uint64_t histogram_hash) const = 0; 23 }; 24 25 } // namespace base 26 27 #endif // BASE_METRICS_RECORD_HISTOGRAM_CHECKER_H_ 28
