| /* |
| * Copyright (C) 2017 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. |
| */ |
| |
| #include "chre/platform/linux/platform_log.h" |
| |
| #include <cstdarg> |
| #include <cstdio> |
| #include <iostream> |
| |
| #include "chre/platform/fatal_error.h" |
| #include "chre/platform/shared/bt_snoop_log.h" |
| |
| void chrePlatformBtSnoopLog(BtSnoopDirection /*direction*/, |
| const uint8_t * /*buffer*/, size_t /*size*/) { |
| // Unimplemented in this platform |
| } |
| |
| namespace chre { |
| |
| void PlatformLog::logLooper() { |
| while (1) { |
| char *logMessage = nullptr; |
| |
| { |
| std::unique_lock<std::mutex> lock(mMutex); |
| mConditionVariable.wait( |
| lock, [this] { return (!mLogQueue.empty() || mStopLogger); }); |
| |
| if (!mLogQueue.empty()) { |
| // Move the log message to avoid holding a lock for longer than |
| // required. |
| logMessage = mLogQueue.front(); |
| mLogQueue.pop(); |
| } else if (mStopLogger) { |
| // The stop logger is checked in an else-if to allow the main log queue |
| // to drain when the logger is stopping. |
| break; |
| } |
| } |
| |
| // If we get here, there must be a log message to output. This is outside of |
| // the context of the lock which means that the logging thread will only be |
| // blocked for the minimum amount of time. |
| std::cerr << logMessage << std::endl; |
| free(logMessage); |
| } |
| } |
| |
| PlatformLog::PlatformLog() { |
| mLoggerThread = std::thread(&PlatformLog::logLooper, this); |
| } |
| |
| PlatformLog::~PlatformLog() { |
| { |
| std::unique_lock<std::mutex> lock(mMutex); |
| mStopLogger = true; |
| mConditionVariable.notify_one(); |
| } |
| |
| mLoggerThread.join(); |
| } |
| |
| void PlatformLog::logVa(chreLogLevel /*logLevel*/, const char *formatStr, |
| va_list args) { |
| char *formattedStr; |
| int result = vasprintf(&formattedStr, formatStr, args); |
| |
| if (result >= 0) { |
| std::unique_lock<std::mutex> lock(mMutex); |
| mLogQueue.push(formattedStr); |
| mConditionVariable.notify_one(); |
| } else { |
| FATAL_ERROR("Failed to allocate log message"); |
| } |
| } |
| |
| } // namespace chre |