chrome/browser/media_galleries/linux/mtp_device_task_helper_map_service.cc

   1 // Copyright 2013 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/media_galleries/linux/mtp_device_task_helper_map_service.h"
   6
   7 #include "base/logging.h"
   8 #include "base/stl_util.h"
   9 #include "chrome/browser/media_galleries/linux/mtp_device_task_helper.h"
  10 #include "content/public/browser/browser_thread.h"
  11
  12 namespace {
  13
  14 base::LazyInstance<MTPDeviceTaskHelperMapService>
  15     g_mtp_device_task_helper_map_service = LAZY_INSTANCE_INITIALIZER;
  16
  17 }  // namespace
  18
  19 // static
  20 MTPDeviceTaskHelperMapService* MTPDeviceTaskHelperMapService::GetInstance() {
  21   return g_mtp_device_task_helper_map_service.Pointer();
  22 }
  23
  24 MTPDeviceTaskHelper* MTPDeviceTaskHelperMapService::CreateDeviceTaskHelper(
  25     const std::string& storage_name,
  26     const bool read_only) {
  27   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
  28   DCHECK(!storage_name.empty());
  29   const MTPDeviceTaskHelperKey key =
  30       GetMTPDeviceTaskHelperKey(storage_name, read_only);
  31   DCHECK(!ContainsKey(task_helper_map_, key));
  32   MTPDeviceTaskHelper* task_helper = new MTPDeviceTaskHelper();
  33   task_helper_map_[key] = task_helper;
  34   return task_helper;
  35 }
  36
  37 void MTPDeviceTaskHelperMapService::DestroyDeviceTaskHelper(
  38     const std::string& storage_name,
  39     const bool read_only) {
  40   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
  41   const MTPDeviceTaskHelperKey key =
  42       GetMTPDeviceTaskHelperKey(storage_name, read_only);
  43   TaskHelperMap::iterator it = task_helper_map_.find(key);
  44   if (it == task_helper_map_.end())
  45     return;
  46   delete it->second;
  47   task_helper_map_.erase(it);
  48 }
  49
  50 MTPDeviceTaskHelper* MTPDeviceTaskHelperMapService::GetDeviceTaskHelper(
  51     const std::string& storage_name,
  52     const bool read_only) {
  53   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
  54   DCHECK(!storage_name.empty());
  55   const MTPDeviceTaskHelperKey key =
  56       GetMTPDeviceTaskHelperKey(storage_name, read_only);
  57   TaskHelperMap::const_iterator it = task_helper_map_.find(key);
  58   return (it != task_helper_map_.end()) ? it->second : NULL;
  59 }
  60
  61 // static
  62 MTPDeviceTaskHelperMapService::MTPDeviceTaskHelperKey
  63 MTPDeviceTaskHelperMapService::GetMTPDeviceTaskHelperKey(
  64     const std::string& storage_name,
  65     const bool read_only) {
  66   return (read_only ? "ReadOnly" : "ReadWrite") + std::string("|") +
  67          storage_name;
  68 }
  69
  70 MTPDeviceTaskHelperMapService::MTPDeviceTaskHelperMapService() {
  71 }
  72
  73 MTPDeviceTaskHelperMapService::~MTPDeviceTaskHelperMapService() {
  74 }