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85 lines
2.3 KiB
85 lines
2.3 KiB
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "chre/platform/linux/platform_log.h"
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#include <cstdarg>
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#include <cstdio>
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#include <iostream>
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#include "chre/platform/fatal_error.h"
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namespace chre {
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void PlatformLog::logLooper() {
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while (1) {
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char *logMessage = nullptr;
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{
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std::unique_lock<std::mutex> lock(mMutex);
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mConditionVariable.wait(
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lock, [this] { return (!mLogQueue.empty() || mStopLogger); });
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if (!mLogQueue.empty()) {
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// Move the log message to avoid holding a lock for longer than
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// required.
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logMessage = mLogQueue.front();
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mLogQueue.pop();
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} else if (mStopLogger) {
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// The stop logger is checked in an else-if to allow the main log queue
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// to drain when the logger is stopping.
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break;
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}
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}
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// If we get here, there must be a log message to output. This is outside of
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// the context of the lock which means that the logging thread will only be
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// blocked for the minimum amount of time.
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std::cerr << logMessage << std::endl;
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free(logMessage);
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}
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}
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PlatformLog::PlatformLog() {
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mLoggerThread = std::thread(&PlatformLog::logLooper, this);
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}
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PlatformLog::~PlatformLog() {
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{
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std::unique_lock<std::mutex> lock(mMutex);
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mStopLogger = true;
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mConditionVariable.notify_one();
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}
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mLoggerThread.join();
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}
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void PlatformLog::logVa(chreLogLevel /*logLevel*/, const char *formatStr,
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va_list args) {
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char *formattedStr;
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int result = vasprintf(&formattedStr, formatStr, args);
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if (result >= 0) {
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std::unique_lock<std::mutex> lock(mMutex);
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mLogQueue.push(formattedStr);
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mConditionVariable.notify_one();
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} else {
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FATAL_ERROR("Failed to allocate log message");
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}
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}
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} // namespace chre
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