blob: dbd5530b486448859b3728de3829670fb7319e9f [file] [log] [blame]
// 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