| // Copyright 2021 The Abseil Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef ABSL_STRINGS_CORD_ANALYSIS_H_ |
| #define ABSL_STRINGS_CORD_ANALYSIS_H_ |
| |
| #include <cstddef> |
| #include <cstdint> |
| |
| #include "absl/base/config.h" |
| #include "absl/strings/internal/cord_internal.h" |
| |
| namespace absl { |
| ABSL_NAMESPACE_BEGIN |
| namespace cord_internal { |
| |
| // Returns the *approximate* number of bytes held in full or in part by this |
| // Cord (which may not remain the same between invocations). Cords that share |
| // memory could each be "charged" independently for the same shared memory. |
| size_t GetEstimatedMemoryUsage(const CordRep* rep); |
| |
| // Returns the *approximate* number of bytes held in full or in part by this |
| // CordRep weighted by the sharing ratio of that data. For example, if some data |
| // edge is shared by 4 different Cords, then each cord is attribute 1/4th of |
| // the total memory usage as a 'fair share' of the total memory usage. |
| size_t GetEstimatedFairShareMemoryUsage(const CordRep* rep); |
| |
| } // namespace cord_internal |
| ABSL_NAMESPACE_END |
| } // namespace absl |
| |
| |
| #endif // ABSL_STRINGS_CORD_ANALYSIS_H_ |