Delete DataLog abstraction, which was almost unused.

webrtc/system_wrappers/include/data_log_impl.h

-/*
- *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-// This file contains the helper classes for the DataLog APIs. See data_log.h
-// for the APIs.
-//
-// These classes are helper classes used for logging data for offline
-// processing. Data logged with these classes can conveniently be parsed and
-// processed with e.g. Matlab.
-#ifndef WEBRTC_SYSTEM_WRAPPERS_INCLUDE_DATA_LOG_IMPL_H_
-#define WEBRTC_SYSTEM_WRAPPERS_INCLUDE_DATA_LOG_IMPL_H_
-
-#include <map>
-#include <memory>
-#include <sstream>
-#include <string>
-#include <vector>
-
-#include "webrtc/base/platform_thread.h"
-#include "webrtc/typedefs.h"
-
-namespace webrtc {
-
-class CriticalSectionWrapper;
-class EventWrapper;
-class LogTable;
-class RWLockWrapper;
-
-// All container classes need to implement a ToString-function to be
-// writable to file. Enforce this via the Container interface.
-class Container {
- public:
-  virtual ~Container() {}
-
-  virtual void ToString(std::string* container_string) const = 0;
-};
-
-template<class T>
-class ValueContainer : public Container {
- public:
-  explicit ValueContainer(T data) : data_(data) {}
-
-  virtual void ToString(std::string* container_string) const {
-    *container_string = "";
-    std::stringstream ss;
-    ss << data_ << ",";
-    ss >> *container_string;
-  }
-
- private:
-  T   data_;
-};
-
-template<class T>
-class MultiValueContainer : public Container {
- public:
-  MultiValueContainer(const T* data, int length)
-    : data_(data, data + length) {
-  }
-
-  virtual void ToString(std::string* container_string) const {
-    *container_string = "";
-    std::stringstream ss;
-    for (size_t i = 0; i < data_.size(); ++i)
-      ss << data_[i] << ",";
-    *container_string += ss.str();
-  }
-
- private:
-  std::vector<T>  data_;
-};
-
-class DataLogImpl {
- public:
-  ~DataLogImpl();
-
-  // The implementation of the CreateLog() method declared in data_log.h.
-  // See data_log.h for a description.
-  static int CreateLog();
-
-  // The implementation of the StaticInstance() method declared in data_log.h.
-  // See data_log.h for a description.
-  static DataLogImpl* StaticInstance();
-
-  // The implementation of the ReturnLog() method declared in data_log.h. See
-  // data_log.h for a description.
-  static void ReturnLog();
-
-  // The implementation of the AddTable() method declared in data_log.h. See
-  // data_log.h for a description.
-  int AddTable(const std::string& table_name);
-
-  // The implementation of the AddColumn() method declared in data_log.h. See
-  // data_log.h for a description.
-  int AddColumn(const std::string& table_name,
-                const std::string& column_name,
-                int multi_value_length);
-
-  // Inserts a Container into a table with name table_name at the column
-  // with name column_name.
-  // column_name is treated in a case sensitive way.
-  int InsertCell(const std::string& table_name,
-                 const std::string& column_name,
-                 const Container* value_container);
-
-  // The implementation of the NextRow() method declared in data_log.h. See
-  // data_log.h for a description.
-  int NextRow(const std::string& table_name);
-
- private:
-  DataLogImpl();
-
-  // Initializes the DataLogImpl object, allocates and starts the
-  // thread file_writer_thread_.
-  int Init();
-
-  // Write all complete rows in every table to file.
-  // This function should only be called by the file_writer_thread_ if that
-  // thread is running to avoid race conditions.
-  void Flush();
-
-  // Run() is called by the thread file_writer_thread_.
-  static bool Run(void* obj);
-
-  // This function writes data to file. Note, it blocks if there is no data
-  // that should be written to file availble. Flush is the non-blocking
-  // version of this function.
-  void Process();
-
-  // Stops the continuous calling of Process().
-  void StopThread();
-
-  // Collection of tables indexed by the table name as std::string.
-  typedef std::map<std::string, LogTable*> TableMap;
-  typedef std::unique_ptr<CriticalSectionWrapper> CritSectScopedPtr;
-
-  static CritSectScopedPtr  crit_sect_;
-  static DataLogImpl*       instance_;
-  int                       counter_;
-  TableMap                  tables_;
-  EventWrapper*             flush_event_;
-  // This is a unique_ptr so that we don't have to create threads in the no-op
-  // impl.
-  std::unique_ptr<rtc::PlatformThread> file_writer_thread_;
-  RWLockWrapper*            tables_lock_;
-};
-
-}  // namespace webrtc
-
-#endif  // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_DATA_LOG_IMPL_H_