chrome/browser/sync_file_system/task_logger.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/sync_file_system/task_logger.h"
   6
   7 #include "base/lazy_instance.h"
   8 #include "base/stl_util.h"
   9 #include "base/synchronization/lock.h"
  10
  11 namespace sync_file_system {
  12
  13 namespace {
  14
  15 const size_t kMaxLogSize = 500;
  16
  17 int g_next_log_id = 1;
  18 base::LazyInstance<base::Lock>::Leaky g_log_id_lock = LAZY_INSTANCE_INITIALIZER;
  19
  20 int GenerateLogID() {
  21   base::AutoLock lock(g_log_id_lock.Get());
  22   return g_next_log_id++;
  23 }
  24
  25 }  // namespace
  26
  27 typedef TaskLogger::TaskLog TaskLog;
  28
  29 TaskLogger::TaskLog::TaskLog() : log_id(GenerateLogID()) {}
  30 TaskLogger::TaskLog::~TaskLog() {}
  31
  32 TaskLogger::TaskLogger() {}
  33
  34 TaskLogger::~TaskLogger() {
  35   ClearLog();
  36 }
  37
  38 void TaskLogger::RecordLog(scoped_ptr<TaskLog> log) {
  39   if (!log)
  40     return;
  41
  42   if (log_history_.size() >= kMaxLogSize) {
  43     delete log_history_.front();
  44     log_history_.pop_front();
  45   }
  46
  47   log_history_.push_back(log.release());
  48
  49   FOR_EACH_OBSERVER(Observer, observers_,
  50                     OnLogRecorded(*log_history_.back()));
  51 }
  52
  53 void TaskLogger::ClearLog() {
  54   STLDeleteContainerPointers(log_history_.begin(), log_history_.end());
  55   log_history_.clear();
  56 }
  57
  58 void TaskLogger::AddObserver(Observer* observer) {
  59   observers_.AddObserver(observer);
  60 }
  61
  62 void TaskLogger::RemoveObserver(Observer* observer) {
  63   observers_.RemoveObserver(observer);
  64 }
  65
  66 const TaskLogger::LogList& TaskLogger::GetLog() const {
  67   return log_history_;
  68 }
  69
  70 }  // namespace sync_file_system