| // Copyright 2023 The Pigweed 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. |
| |
| #include "pw_bluetooth_sapphire/internal/host/common/retire_log.h" |
| |
| #include <limits> |
| |
| namespace bt::internal { |
| |
| RetireLog::RetireLog(size_t min_depth, size_t max_depth) |
| : min_depth_(min_depth), max_depth_(max_depth) { |
| BT_ASSERT(min_depth_ > 0); |
| BT_ASSERT(min_depth_ <= max_depth_); |
| |
| // For simplicity, log indexes are computed with doubles, so limit the depth |
| // to 2**53 in which precision is preserved, assuming IEEE-754 DPFPs. |
| BT_ASSERT(max_depth_ <= |
| (decltype(max_depth_){1} << std::numeric_limits<double>::digits)); |
| buffer_.reserve(max_depth_); |
| std::apply( |
| [this](auto&... scratchpad) { (scratchpad.reserve(max_depth_), ...); }, |
| quantile_scratchpads_); |
| } |
| |
| void RetireLog::Retire(size_t byte_count, |
| pw::chrono::SystemClock::duration age) { |
| if (depth() < max_depth_) { |
| buffer_.push_back({byte_count, age}); |
| return; |
| } |
| buffer_[next_insertion_index_] = {byte_count, age}; |
| next_insertion_index_ = (next_insertion_index_ + 1) % depth(); |
| } |
| |
| } // namespace bt::internal |