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/*
* Copyright 2020 The Android Open Source Project
*
* 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
*
* http://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.
*/
#define LOG_TAG "BtStopWatchLegacy"
#include "common/stop_watch_legacy.h"
#include <bluetooth/log.h>
#include <array>
#include <iomanip>
#include <mutex>
#include <sstream>
#include <utility>
namespace bluetooth {
namespace common {
static const int LOG_BUFFER_LENGTH = 10;
static std::array<StopWatchLog, LOG_BUFFER_LENGTH> stopwatch_logs;
static int current_buffer_index;
static std::recursive_mutex stopwatch_log_mutex;
void StopWatchLegacy::RecordLog(StopWatchLog log) {
std::unique_lock<std::recursive_mutex> lock(stopwatch_log_mutex, std::defer_lock);
if (!lock.try_lock()) {
log::info(
"try_lock fail. log content: {}, took {} us", log.message,
static_cast<size_t>(
std::chrono::duration_cast<std::chrono::microseconds>(
stopwatch_logs[current_buffer_index % LOG_BUFFER_LENGTH].end_timestamp -
stopwatch_logs[current_buffer_index % LOG_BUFFER_LENGTH]
.start_timestamp)
.count()));
return;
}
if (current_buffer_index >= LOG_BUFFER_LENGTH) {
current_buffer_index = 0;
}
stopwatch_logs[current_buffer_index] = std::move(log);
current_buffer_index++;
lock.unlock();
}
void StopWatchLegacy::DumpStopWatchLog() {
std::lock_guard<std::recursive_mutex> lock(stopwatch_log_mutex);
log::info("=-----------------------------------=");
log::info("bluetooth stopwatch log history:");
for (int i = 0; i < LOG_BUFFER_LENGTH; i++) {
if (current_buffer_index >= LOG_BUFFER_LENGTH) {
current_buffer_index = 0;
}
if (stopwatch_logs[current_buffer_index].message.empty()) {
current_buffer_index++;
continue;
}
std::stringstream ss;
auto now = stopwatch_logs[current_buffer_index].timestamp;
auto millis =
std::chrono::duration_cast<std::chrono::milliseconds>(now.time_since_epoch()) % 1000;
auto now_time_t = std::chrono::system_clock::to_time_t(now);
ss << std::put_time(std::localtime(&now_time_t), "%Y-%m-%d %H:%M:%S");
ss << '.' << std::setfill('0') << std::setw(3) << millis.count();
std::string start_timestamp = ss.str();
log::info("{}: {}: took {} us", start_timestamp, stopwatch_logs[current_buffer_index].message,
static_cast<size_t>(std::chrono::duration_cast<std::chrono::microseconds>(
stopwatch_logs[current_buffer_index].end_timestamp -
stopwatch_logs[current_buffer_index].start_timestamp)
.count()));
current_buffer_index++;
}
log::info("=-----------------------------------=");
}
StopWatchLegacy::StopWatchLegacy(std::string text)
: text_(std::move(text)),
timestamp_(std::chrono::system_clock::now()),
start_timestamp_(std::chrono::high_resolution_clock::now()) {}
StopWatchLegacy::~StopWatchLegacy() {
StopWatchLog sw_log;
sw_log.timestamp = timestamp_;
sw_log.start_timestamp = start_timestamp_;
sw_log.end_timestamp = std::chrono::high_resolution_clock::now();
sw_log.message = std::move(text_);
RecordLog(std::move(sw_log));
}
} // namespace common
} // namespace bluetooth
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