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Diffstat (limited to 'absl/strings/cord_analysis.h')
-rw-r--r-- | absl/strings/cord_analysis.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/absl/strings/cord_analysis.h b/absl/strings/cord_analysis.h new file mode 100644 index 00000000..7041ad1a --- /dev/null +++ b/absl/strings/cord_analysis.h @@ -0,0 +1,44 @@ +// 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_ |